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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
commit2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch)
tree848558de17fb3008cdf4d861b01ac7781903ce39 /drivers/net/wan
parentInitial commit. (diff)
downloadlinux-2c3c1048746a4622d8c89a29670120dc8fab93c4.tar.xz
linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.zip
Adding upstream version 6.1.76.upstream/6.1.76
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'drivers/net/wan')
-rw-r--r--drivers/net/wan/.gitignore2
-rw-r--r--drivers/net/wan/Kconfig248
-rw-r--r--drivers/net/wan/Makefile62
-rw-r--r--drivers/net/wan/c101.c440
-rw-r--r--drivers/net/wan/farsync.c2596
-rw-r--r--drivers/net/wan/farsync.h347
-rw-r--r--drivers/net/wan/fsl_ucc_hdlc.c1310
-rw-r--r--drivers/net/wan/fsl_ucc_hdlc.h145
-rw-r--r--drivers/net/wan/hd64570.c724
-rw-r--r--drivers/net/wan/hd64570.h242
-rw-r--r--drivers/net/wan/hd64572.c636
-rw-r--r--drivers/net/wan/hd64572.h522
-rw-r--r--drivers/net/wan/hdlc.c379
-rw-r--r--drivers/net/wan/hdlc_cisco.c383
-rw-r--r--drivers/net/wan/hdlc_fr.c1300
-rw-r--r--drivers/net/wan/hdlc_ppp.c725
-rw-r--r--drivers/net/wan/hdlc_raw.c112
-rw-r--r--drivers/net/wan/hdlc_raw_eth.c132
-rw-r--r--drivers/net/wan/hdlc_x25.c384
-rw-r--r--drivers/net/wan/ixp4xx_hss.c1545
-rw-r--r--drivers/net/wan/lapbether.c526
-rw-r--r--drivers/net/wan/n2.c546
-rw-r--r--drivers/net/wan/pc300too.c513
-rw-r--r--drivers/net/wan/pci200syn.c433
-rw-r--r--drivers/net/wan/slic_ds26522.c244
-rw-r--r--drivers/net/wan/slic_ds26522.h130
-rw-r--r--drivers/net/wan/wanxl.c844
-rw-r--r--drivers/net/wan/wanxl.h149
-rw-r--r--drivers/net/wan/wanxlfw.S894
-rw-r--r--drivers/net/wan/wanxlfw.inc_shipped158
30 files changed, 16671 insertions, 0 deletions
diff --git a/drivers/net/wan/.gitignore b/drivers/net/wan/.gitignore
new file mode 100644
index 000000000..247bfbf10
--- /dev/null
+++ b/drivers/net/wan/.gitignore
@@ -0,0 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0-only
+wanxlfw.inc
diff --git a/drivers/net/wan/Kconfig b/drivers/net/wan/Kconfig
new file mode 100644
index 000000000..dcb069dde
--- /dev/null
+++ b/drivers/net/wan/Kconfig
@@ -0,0 +1,248 @@
+# SPDX-License-Identifier: GPL-2.0-only
+#
+# wan devices configuration
+#
+
+menuconfig WAN
+ bool "Wan interfaces support"
+ help
+ Wide Area Networks (WANs), such as X.25, Frame Relay and leased
+ lines, are used to interconnect Local Area Networks (LANs) over vast
+ distances with data transfer rates significantly higher than those
+ achievable with commonly used asynchronous modem connections.
+
+ Usually, a quite expensive external device called a `WAN router' is
+ needed to connect to a WAN. As an alternative, a relatively
+ inexpensive WAN interface card can allow your Linux box to directly
+ connect to a WAN.
+
+ If you have one of those cards and wish to use it under Linux,
+ say Y here and also to the WAN driver for your card.
+
+ If unsure, say N.
+
+if WAN
+
+# Generic HDLC
+config HDLC
+ tristate "Generic HDLC layer"
+ help
+ Say Y to this option if your Linux box contains a WAN (Wide Area
+ Network) card supported by this driver and you are planning to
+ connect the box to a WAN.
+
+ You will need supporting software from
+ <http://www.kernel.org/pub/linux/utils/net/hdlc/>.
+ Generic HDLC driver currently supports raw HDLC, Cisco HDLC, Frame
+ Relay, synchronous Point-to-Point Protocol (PPP) and X.25.
+
+ To compile this driver as a module, choose M here: the
+ module will be called hdlc.
+
+ If unsure, say N.
+
+config HDLC_RAW
+ tristate "Raw HDLC support"
+ depends on HDLC
+ help
+ Generic HDLC driver supporting raw HDLC over WAN connections.
+
+ If unsure, say N.
+
+config HDLC_RAW_ETH
+ tristate "Raw HDLC Ethernet device support"
+ depends on HDLC
+ help
+ Generic HDLC driver supporting raw HDLC Ethernet device emulation
+ over WAN connections.
+
+ You will need it for Ethernet over HDLC bridges.
+
+ If unsure, say N.
+
+config HDLC_CISCO
+ tristate "Cisco HDLC support"
+ depends on HDLC
+ help
+ Generic HDLC driver supporting Cisco HDLC over WAN connections.
+
+ If unsure, say N.
+
+config HDLC_FR
+ tristate "Frame Relay support"
+ depends on HDLC
+ help
+ Generic HDLC driver supporting Frame Relay over WAN connections.
+
+ If unsure, say N.
+
+config HDLC_PPP
+ tristate "Synchronous Point-to-Point Protocol (PPP) support"
+ depends on HDLC
+ help
+ Generic HDLC driver supporting PPP over WAN connections.
+
+ If unsure, say N.
+
+config HDLC_X25
+ tristate "X.25 protocol support"
+ depends on HDLC && (LAPB=m && HDLC=m || LAPB=y)
+ help
+ Generic HDLC driver supporting X.25 over WAN connections.
+
+ If unsure, say N.
+
+comment "X.25/LAPB support is disabled"
+ depends on HDLC && (LAPB!=m || HDLC!=m) && LAPB!=y
+
+config PCI200SYN
+ tristate "Goramo PCI200SYN support"
+ depends on HDLC && PCI
+ help
+ Driver for PCI200SYN cards by Goramo sp. j.
+
+ If you have such a card, say Y here and see
+ <http://www.kernel.org/pub/linux/utils/net/hdlc/>.
+
+ To compile this as a module, choose M here: the
+ module will be called pci200syn.
+
+ If unsure, say N.
+
+config WANXL
+ tristate "SBE Inc. wanXL support"
+ depends on HDLC && PCI
+ help
+ Driver for wanXL PCI cards by SBE Inc.
+
+ If you have such a card, say Y here and see
+ <http://www.kernel.org/pub/linux/utils/net/hdlc/>.
+
+ To compile this as a module, choose M here: the
+ module will be called wanxl.
+
+ If unsure, say N.
+
+config WANXL_BUILD_FIRMWARE
+ bool "rebuild wanXL firmware"
+ depends on WANXL && !PREVENT_FIRMWARE_BUILD
+ help
+ Allows you to rebuild firmware run by the QUICC processor.
+ It requires m68k toolchains and hexdump programs.
+
+ You should never need this option, say N.
+
+config PC300TOO
+ tristate "Cyclades PC300 RSV/X21 alternative support"
+ depends on HDLC && PCI
+ help
+ Alternative driver for PC300 RSV/X21 PCI cards made by
+ Cyclades, Inc. If you have such a card, say Y here and see
+ <http://www.kernel.org/pub/linux/utils/net/hdlc/>.
+
+ To compile this as a module, choose M here: the module
+ will be called pc300too.
+
+ If unsure, say N here.
+
+config N2
+ tristate "SDL RISCom/N2 support"
+ depends on HDLC && ISA
+ help
+ Driver for RISCom/N2 single or dual channel ISA cards by
+ SDL Communications Inc.
+
+ If you have such a card, say Y here and see
+ <http://www.kernel.org/pub/linux/utils/net/hdlc/>.
+
+ Note that N2csu and N2dds cards are not supported by this driver.
+
+ To compile this driver as a module, choose M here: the module
+ will be called n2.
+
+ If unsure, say N.
+
+config C101
+ tristate "Moxa C101 support"
+ depends on HDLC && ISA
+ help
+ Driver for C101 SuperSync ISA cards by Moxa Technologies Co., Ltd.
+
+ If you have such a card, say Y here and see
+ <http://www.kernel.org/pub/linux/utils/net/hdlc/>.
+
+ To compile this driver as a module, choose M here: the
+ module will be called c101.
+
+ If unsure, say N.
+
+config FARSYNC
+ tristate "FarSync T-Series support"
+ depends on HDLC && PCI
+ help
+ Support for the FarSync T-Series X.21 (and V.35/V.24) cards by
+ FarSite Communications Ltd.
+
+ Synchronous communication is supported on all ports at speeds up to
+ 8Mb/s (128K on V.24) using synchronous PPP, Cisco HDLC, raw HDLC,
+ Frame Relay or X.25/LAPB.
+
+ If you want the module to be automatically loaded when the interface
+ is referenced then you should add "alias hdlcX farsync" to a file
+ in /etc/modprobe.d/ for each interface, where X is 0, 1, 2, ..., or
+ simply use "alias hdlc* farsync" to indicate all of them.
+
+ To compile this driver as a module, choose M here: the
+ module will be called farsync.
+
+config FSL_UCC_HDLC
+ tristate "Freescale QUICC Engine HDLC support"
+ depends on HDLC
+ depends on QUICC_ENGINE
+ help
+ Driver for Freescale QUICC Engine HDLC controller. The driver
+ supports HDLC in NMSI and TDM mode.
+
+ To compile this driver as a module, choose M here: the
+ module will be called fsl_ucc_hdlc.
+
+config SLIC_DS26522
+ tristate "Slic Maxim ds26522 card support"
+ depends on SPI
+ depends on FSL_SOC || ARCH_MXC || ARCH_LAYERSCAPE || COMPILE_TEST
+ select BITREVERSE
+ help
+ This module initializes and configures the slic maxim card
+ in T1 or E1 mode.
+
+ To compile this driver as a module, choose M here: the
+ module will be called slic_ds26522.
+
+config IXP4XX_HSS
+ tristate "Intel IXP4xx HSS (synchronous serial port) support"
+ depends on HDLC && IXP4XX_NPE && IXP4XX_QMGR
+ depends on ARCH_IXP4XX && OF
+ select MFD_SYSCON
+ help
+ Say Y here if you want to use built-in HSS ports
+ on IXP4xx processor.
+
+# X.25 network drivers
+config LAPBETHER
+ tristate "LAPB over Ethernet driver"
+ depends on LAPB && X25
+ help
+ Driver for a pseudo device (typically called /dev/lapb0) which allows
+ you to open an LAPB point-to-point connection to some other computer
+ on your Ethernet network.
+
+ In order to do this, you need to say Y or M to the driver for your
+ Ethernet card as well as to "LAPB Data Link Driver".
+
+ To compile this driver as a module, choose M here: the
+ module will be called lapbether.
+
+
+ If unsure, say N.
+
+endif # WAN
diff --git a/drivers/net/wan/Makefile b/drivers/net/wan/Makefile
new file mode 100644
index 000000000..5bec8fae4
--- /dev/null
+++ b/drivers/net/wan/Makefile
@@ -0,0 +1,62 @@
+# SPDX-License-Identifier: GPL-2.0
+#
+# Makefile for the Linux network (wan) device drivers.
+#
+# 3 Aug 2000, Christoph Hellwig <hch@infradead.org>
+# Rewritten to use lists instead of if-statements.
+#
+
+obj-$(CONFIG_HDLC) += hdlc.o
+obj-$(CONFIG_HDLC_RAW) += hdlc_raw.o
+obj-$(CONFIG_HDLC_RAW_ETH) += hdlc_raw_eth.o
+obj-$(CONFIG_HDLC_CISCO) += hdlc_cisco.o
+obj-$(CONFIG_HDLC_FR) += hdlc_fr.o
+obj-$(CONFIG_HDLC_PPP) += hdlc_ppp.o
+obj-$(CONFIG_HDLC_X25) += hdlc_x25.o
+
+obj-$(CONFIG_FARSYNC) += farsync.o
+
+obj-$(CONFIG_LAPBETHER) += lapbether.o
+obj-$(CONFIG_N2) += n2.o
+obj-$(CONFIG_C101) += c101.o
+obj-$(CONFIG_WANXL) += wanxl.o
+obj-$(CONFIG_PCI200SYN) += pci200syn.o
+obj-$(CONFIG_PC300TOO) += pc300too.o
+obj-$(CONFIG_IXP4XX_HSS) += ixp4xx_hss.o
+obj-$(CONFIG_FSL_UCC_HDLC) += fsl_ucc_hdlc.o
+obj-$(CONFIG_SLIC_DS26522) += slic_ds26522.o
+
+clean-files := wanxlfw.inc
+$(obj)/wanxl.o: $(obj)/wanxlfw.inc
+
+CROSS_COMPILE_M68K = m68k-linux-gnu-
+
+ifeq ($(CONFIG_WANXL_BUILD_FIRMWARE),y)
+ifeq ($(ARCH),m68k)
+ M68KCC = $(CC)
+ M68KLD = $(LD)
+else
+ M68KCC = $(CROSS_COMPILE_M68K)gcc
+ M68KLD = $(CROSS_COMPILE_M68K)ld
+endif
+
+quiet_cmd_build_wanxlfw = BLDFW $@
+ cmd_build_wanxlfw = hexdump -ve '"\n" 16/1 "0x%02X,"' $< | \
+ sed 's/0x ,//g;1s/^/static const u8 firmware[]={/;$$s/,$$/\n};\n/' > $@
+
+$(obj)/wanxlfw.inc: $(obj)/wanxlfw.bin FORCE
+ $(call if_changed,build_wanxlfw)
+
+quiet_cmd_m68kld_bin_o = M68KLD $@
+ cmd_m68kld_bin_o = $(M68KLD) --oformat binary -Ttext 0x1000 $< -o $@
+
+$(obj)/wanxlfw.bin: $(obj)/wanxlfw.o FORCE
+ $(call if_changed,m68kld_bin_o)
+
+quiet_cmd_m68kas_o_S = M68KAS $@
+ cmd_m68kas_o_S = $(M68KCC) -D__ASSEMBLY__ -Wp,-MD,$(depfile) -I$(srctree)/include/uapi -c -o $@ $<
+
+$(obj)/wanxlfw.o: $(src)/wanxlfw.S FORCE
+ $(call if_changed_dep,m68kas_o_S)
+endif
+targets += wanxlfw.inc wanxlfw.bin wanxlfw.o
diff --git a/drivers/net/wan/c101.c b/drivers/net/wan/c101.c
new file mode 100644
index 000000000..8dd14d916
--- /dev/null
+++ b/drivers/net/wan/c101.c
@@ -0,0 +1,440 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Moxa C101 synchronous serial card driver for Linux
+ *
+ * Copyright (C) 2000-2003 Krzysztof Halasa <khc@pm.waw.pl>
+ *
+ * For information see <https://www.kernel.org/pub/linux/utils/net/hdlc/>
+ *
+ * Sources of information:
+ * Hitachi HD64570 SCA User's Manual
+ * Moxa C101 User's Manual
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/capability.h>
+#include <linux/slab.h>
+#include <linux/types.h>
+#include <linux/string.h>
+#include <linux/errno.h>
+#include <linux/init.h>
+#include <linux/netdevice.h>
+#include <linux/hdlc.h>
+#include <linux/delay.h>
+#include <asm/io.h>
+
+#include "hd64570.h"
+
+static const char *version = "Moxa C101 driver version: 1.15";
+static const char *devname = "C101";
+
+#undef DEBUG_PKT
+#define DEBUG_RINGS
+
+#define C101_PAGE 0x1D00
+#define C101_DTR 0x1E00
+#define C101_SCA 0x1F00
+#define C101_WINDOW_SIZE 0x2000
+#define C101_MAPPED_RAM_SIZE 0x4000
+
+#define RAM_SIZE (256 * 1024)
+#define TX_RING_BUFFERS 10
+#define RX_RING_BUFFERS ((RAM_SIZE - C101_WINDOW_SIZE) / \
+ (sizeof(pkt_desc) + HDLC_MAX_MRU) - TX_RING_BUFFERS)
+
+#define CLOCK_BASE 9830400 /* 9.8304 MHz */
+#define PAGE0_ALWAYS_MAPPED
+
+static char *hw; /* pointer to hw=xxx command line string */
+
+typedef struct card_s {
+ struct net_device *dev;
+ spinlock_t lock; /* TX lock */
+ u8 __iomem *win0base; /* ISA window base address */
+ u32 phy_winbase; /* ISA physical base address */
+ sync_serial_settings settings;
+ int rxpart; /* partial frame received, next frame invalid*/
+ unsigned short encoding;
+ unsigned short parity;
+ u16 rx_ring_buffers; /* number of buffers in a ring */
+ u16 tx_ring_buffers;
+ u16 buff_offset; /* offset of first buffer of first channel */
+ u16 rxin; /* rx ring buffer 'in' pointer */
+ u16 txin; /* tx ring buffer 'in' and 'last' pointers */
+ u16 txlast;
+ u8 rxs, txs, tmc; /* SCA registers */
+ u8 irq; /* IRQ (3-15) */
+ u8 page;
+
+ struct card_s *next_card;
+} card_t;
+
+typedef card_t port_t;
+
+static card_t *first_card;
+static card_t **new_card = &first_card;
+
+#define sca_in(reg, card) readb((card)->win0base + C101_SCA + (reg))
+#define sca_out(value, reg, card) writeb(value, (card)->win0base + C101_SCA + (reg))
+#define sca_inw(reg, card) readw((card)->win0base + C101_SCA + (reg))
+
+/* EDA address register must be set in EDAL, EDAH order - 8 bit ISA bus */
+#define sca_outw(value, reg, card) do { \
+ writeb(value & 0xFF, (card)->win0base + C101_SCA + (reg)); \
+ writeb((value >> 8) & 0xFF, (card)->win0base + C101_SCA + (reg + 1));\
+} while (0)
+
+#define port_to_card(port) (port)
+#define log_node(port) (0)
+#define phy_node(port) (0)
+#define winsize(card) (C101_WINDOW_SIZE)
+#define win0base(card) ((card)->win0base)
+#define winbase(card) ((card)->win0base + 0x2000)
+#define get_port(card, port) (card)
+static void sca_msci_intr(port_t *port);
+
+static inline u8 sca_get_page(card_t *card)
+{
+ return card->page;
+}
+
+static inline void openwin(card_t *card, u8 page)
+{
+ card->page = page;
+ writeb(page, card->win0base + C101_PAGE);
+}
+
+#include "hd64570.c"
+
+static inline void set_carrier(port_t *port)
+{
+ if (!(sca_in(MSCI1_OFFSET + ST3, port) & ST3_DCD))
+ netif_carrier_on(port_to_dev(port));
+ else
+ netif_carrier_off(port_to_dev(port));
+}
+
+static void sca_msci_intr(port_t *port)
+{
+ u8 stat = sca_in(MSCI0_OFFSET + ST1, port); /* read MSCI ST1 status */
+
+ /* Reset MSCI TX underrun and CDCD (ignored) status bit */
+ sca_out(stat & (ST1_UDRN | ST1_CDCD), MSCI0_OFFSET + ST1, port);
+
+ if (stat & ST1_UDRN) {
+ /* TX Underrun error detected */
+ port_to_dev(port)->stats.tx_errors++;
+ port_to_dev(port)->stats.tx_fifo_errors++;
+ }
+
+ stat = sca_in(MSCI1_OFFSET + ST1, port); /* read MSCI1 ST1 status */
+ /* Reset MSCI CDCD status bit - uses ch#2 DCD input */
+ sca_out(stat & ST1_CDCD, MSCI1_OFFSET + ST1, port);
+
+ if (stat & ST1_CDCD)
+ set_carrier(port);
+}
+
+static void c101_set_iface(port_t *port)
+{
+ u8 rxs = port->rxs & CLK_BRG_MASK;
+ u8 txs = port->txs & CLK_BRG_MASK;
+
+ switch (port->settings.clock_type) {
+ case CLOCK_INT:
+ rxs |= CLK_BRG_RX; /* TX clock */
+ txs |= CLK_RXCLK_TX; /* BRG output */
+ break;
+
+ case CLOCK_TXINT:
+ rxs |= CLK_LINE_RX; /* RXC input */
+ txs |= CLK_BRG_TX; /* BRG output */
+ break;
+
+ case CLOCK_TXFROMRX:
+ rxs |= CLK_LINE_RX; /* RXC input */
+ txs |= CLK_RXCLK_TX; /* RX clock */
+ break;
+
+ default: /* EXTernal clock */
+ rxs |= CLK_LINE_RX; /* RXC input */
+ txs |= CLK_LINE_TX; /* TXC input */
+ }
+
+ port->rxs = rxs;
+ port->txs = txs;
+ sca_out(rxs, MSCI1_OFFSET + RXS, port);
+ sca_out(txs, MSCI1_OFFSET + TXS, port);
+ sca_set_port(port);
+}
+
+static int c101_open(struct net_device *dev)
+{
+ port_t *port = dev_to_port(dev);
+ int result;
+
+ result = hdlc_open(dev);
+ if (result)
+ return result;
+
+ writeb(1, port->win0base + C101_DTR);
+ sca_out(0, MSCI1_OFFSET + CTL, port); /* RTS uses ch#2 output */
+ sca_open(dev);
+ /* DCD is connected to port 2 !@#$%^& - disable MSCI0 CDCD interrupt */
+ sca_out(IE1_UDRN, MSCI0_OFFSET + IE1, port);
+ sca_out(IE0_TXINT, MSCI0_OFFSET + IE0, port);
+
+ set_carrier(port);
+
+ /* enable MSCI1 CDCD interrupt */
+ sca_out(IE1_CDCD, MSCI1_OFFSET + IE1, port);
+ sca_out(IE0_RXINTA, MSCI1_OFFSET + IE0, port);
+ sca_out(0x48, IER0, port); /* TXINT #0 and RXINT #1 */
+ c101_set_iface(port);
+ return 0;
+}
+
+static int c101_close(struct net_device *dev)
+{
+ port_t *port = dev_to_port(dev);
+
+ sca_close(dev);
+ writeb(0, port->win0base + C101_DTR);
+ sca_out(CTL_NORTS, MSCI1_OFFSET + CTL, port);
+ hdlc_close(dev);
+ return 0;
+}
+
+static int c101_siocdevprivate(struct net_device *dev, struct ifreq *ifr,
+ void __user *data, int cmd)
+{
+#ifdef DEBUG_RINGS
+ port_t *port = dev_to_port(dev);
+
+ if (cmd == SIOCDEVPRIVATE) {
+ sca_dump_rings(dev);
+ printk(KERN_DEBUG "MSCI1: ST: %02x %02x %02x %02x\n",
+ sca_in(MSCI1_OFFSET + ST0, port),
+ sca_in(MSCI1_OFFSET + ST1, port),
+ sca_in(MSCI1_OFFSET + ST2, port),
+ sca_in(MSCI1_OFFSET + ST3, port));
+ return 0;
+ }
+#endif
+
+ return -EOPNOTSUPP;
+}
+
+static int c101_ioctl(struct net_device *dev, struct if_settings *ifs)
+{
+ const size_t size = sizeof(sync_serial_settings);
+ sync_serial_settings new_line;
+ sync_serial_settings __user *line = ifs->ifs_ifsu.sync;
+ port_t *port = dev_to_port(dev);
+
+ switch (ifs->type) {
+ case IF_GET_IFACE:
+ ifs->type = IF_IFACE_SYNC_SERIAL;
+ if (ifs->size < size) {
+ ifs->size = size; /* data size wanted */
+ return -ENOBUFS;
+ }
+ if (copy_to_user(line, &port->settings, size))
+ return -EFAULT;
+ return 0;
+
+ case IF_IFACE_SYNC_SERIAL:
+ if (!capable(CAP_NET_ADMIN))
+ return -EPERM;
+
+ if (copy_from_user(&new_line, line, size))
+ return -EFAULT;
+
+ if (new_line.clock_type != CLOCK_EXT &&
+ new_line.clock_type != CLOCK_TXFROMRX &&
+ new_line.clock_type != CLOCK_INT &&
+ new_line.clock_type != CLOCK_TXINT)
+ return -EINVAL; /* No such clock setting */
+
+ if (new_line.loopback != 0 && new_line.loopback != 1)
+ return -EINVAL;
+
+ memcpy(&port->settings, &new_line, size); /* Update settings */
+ c101_set_iface(port);
+ return 0;
+
+ default:
+ return hdlc_ioctl(dev, ifs);
+ }
+}
+
+static void c101_destroy_card(card_t *card)
+{
+ readb(card->win0base + C101_PAGE); /* Resets SCA? */
+
+ if (card->irq)
+ free_irq(card->irq, card);
+
+ if (card->win0base) {
+ iounmap(card->win0base);
+ release_mem_region(card->phy_winbase, C101_MAPPED_RAM_SIZE);
+ }
+
+ free_netdev(card->dev);
+
+ kfree(card);
+}
+
+static const struct net_device_ops c101_ops = {
+ .ndo_open = c101_open,
+ .ndo_stop = c101_close,
+ .ndo_start_xmit = hdlc_start_xmit,
+ .ndo_siocwandev = c101_ioctl,
+ .ndo_siocdevprivate = c101_siocdevprivate,
+};
+
+static int __init c101_run(unsigned long irq, unsigned long winbase)
+{
+ struct net_device *dev;
+ hdlc_device *hdlc;
+ card_t *card;
+ int result;
+
+ if (irq < 3 || irq > 15 || irq == 6) /* FIXME */ {
+ pr_err("invalid IRQ value\n");
+ return -ENODEV;
+ }
+
+ if (winbase < 0xC0000 || winbase > 0xDFFFF || (winbase & 0x3FFF) != 0) {
+ pr_err("invalid RAM value\n");
+ return -ENODEV;
+ }
+
+ card = kzalloc(sizeof(card_t), GFP_KERNEL);
+ if (!card)
+ return -ENOBUFS;
+
+ card->dev = alloc_hdlcdev(card);
+ if (!card->dev) {
+ pr_err("unable to allocate memory\n");
+ kfree(card);
+ return -ENOBUFS;
+ }
+
+ if (request_irq(irq, sca_intr, 0, devname, card)) {
+ pr_err("could not allocate IRQ\n");
+ c101_destroy_card(card);
+ return -EBUSY;
+ }
+ card->irq = irq;
+
+ if (!request_mem_region(winbase, C101_MAPPED_RAM_SIZE, devname)) {
+ pr_err("could not request RAM window\n");
+ c101_destroy_card(card);
+ return -EBUSY;
+ }
+ card->phy_winbase = winbase;
+ card->win0base = ioremap(winbase, C101_MAPPED_RAM_SIZE);
+ if (!card->win0base) {
+ pr_err("could not map I/O address\n");
+ c101_destroy_card(card);
+ return -EFAULT;
+ }
+
+ card->tx_ring_buffers = TX_RING_BUFFERS;
+ card->rx_ring_buffers = RX_RING_BUFFERS;
+ card->buff_offset = C101_WINDOW_SIZE; /* Bytes 1D00-1FFF reserved */
+
+ readb(card->win0base + C101_PAGE); /* Resets SCA? */
+ udelay(100);
+ writeb(0, card->win0base + C101_PAGE);
+ writeb(0, card->win0base + C101_DTR); /* Power-up for RAM? */
+
+ sca_init(card, 0);
+
+ dev = port_to_dev(card);
+ hdlc = dev_to_hdlc(dev);
+
+ spin_lock_init(&card->lock);
+ dev->irq = irq;
+ dev->mem_start = winbase;
+ dev->mem_end = winbase + C101_MAPPED_RAM_SIZE - 1;
+ dev->tx_queue_len = 50;
+ dev->netdev_ops = &c101_ops;
+ hdlc->attach = sca_attach;
+ hdlc->xmit = sca_xmit;
+ card->settings.clock_type = CLOCK_EXT;
+
+ result = register_hdlc_device(dev);
+ if (result) {
+ pr_warn("unable to register hdlc device\n");
+ c101_destroy_card(card);
+ return result;
+ }
+
+ sca_init_port(card); /* Set up C101 memory */
+ set_carrier(card);
+
+ netdev_info(dev, "Moxa C101 on IRQ%u, using %u TX + %u RX packets rings\n",
+ card->irq, card->tx_ring_buffers, card->rx_ring_buffers);
+
+ *new_card = card;
+ new_card = &card->next_card;
+ return 0;
+}
+
+static int __init c101_init(void)
+{
+ if (!hw) {
+#ifdef MODULE
+ pr_info("no card initialized\n");
+#endif
+ return -EINVAL; /* no parameters specified, abort */
+ }
+
+ pr_info("%s\n", version);
+
+ do {
+ unsigned long irq, ram;
+
+ irq = simple_strtoul(hw, &hw, 0);
+
+ if (*hw++ != ',')
+ break;
+ ram = simple_strtoul(hw, &hw, 0);
+
+ if (*hw == ':' || *hw == '\x0')
+ c101_run(irq, ram);
+
+ if (*hw == '\x0')
+ return first_card ? 0 : -EINVAL;
+ } while (*hw++ == ':');
+
+ pr_err("invalid hardware parameters\n");
+ return first_card ? 0 : -EINVAL;
+}
+
+static void __exit c101_cleanup(void)
+{
+ card_t *card = first_card;
+
+ while (card) {
+ card_t *ptr = card;
+
+ card = card->next_card;
+ unregister_hdlc_device(port_to_dev(ptr));
+ c101_destroy_card(ptr);
+ }
+}
+
+module_init(c101_init);
+module_exit(c101_cleanup);
+
+MODULE_AUTHOR("Krzysztof Halasa <khc@pm.waw.pl>");
+MODULE_DESCRIPTION("Moxa C101 serial port driver");
+MODULE_LICENSE("GPL v2");
+module_param(hw, charp, 0444);
+MODULE_PARM_DESC(hw, "irq,ram:irq,...");
diff --git a/drivers/net/wan/farsync.c b/drivers/net/wan/farsync.c
new file mode 100644
index 000000000..5b01642ca
--- /dev/null
+++ b/drivers/net/wan/farsync.c
@@ -0,0 +1,2596 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/* FarSync WAN driver for Linux (2.6.x kernel version)
+ *
+ * Actually sync driver for X.21, V.35 and V.24 on FarSync T-series cards
+ *
+ * Copyright (C) 2001-2004 FarSite Communications Ltd.
+ * www.farsite.co.uk
+ *
+ * Author: R.J.Dunlop <bob.dunlop@farsite.co.uk>
+ * Maintainer: Kevin Curtis <kevin.curtis@farsite.co.uk>
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/version.h>
+#include <linux/pci.h>
+#include <linux/sched.h>
+#include <linux/slab.h>
+#include <linux/ioport.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/delay.h>
+#include <linux/if.h>
+#include <linux/hdlc.h>
+#include <asm/io.h>
+#include <linux/uaccess.h>
+
+#include "farsync.h"
+
+/* Module info
+ */
+MODULE_AUTHOR("R.J.Dunlop <bob.dunlop@farsite.co.uk>");
+MODULE_DESCRIPTION("FarSync T-Series WAN driver. FarSite Communications Ltd.");
+MODULE_LICENSE("GPL");
+
+/* Driver configuration and global parameters
+ * ==========================================
+ */
+
+/* Number of ports (per card) and cards supported
+ */
+#define FST_MAX_PORTS 4
+#define FST_MAX_CARDS 32
+
+/* Default parameters for the link
+ */
+#define FST_TX_QUEUE_LEN 100 /* At 8Mbps a longer queue length is
+ * useful
+ */
+#define FST_TXQ_DEPTH 16 /* This one is for the buffering
+ * of frames on the way down to the card
+ * so that we can keep the card busy
+ * and maximise throughput
+ */
+#define FST_HIGH_WATER_MARK 12 /* Point at which we flow control
+ * network layer
+ */
+#define FST_LOW_WATER_MARK 8 /* Point at which we remove flow
+ * control from network layer
+ */
+#define FST_MAX_MTU 8000 /* Huge but possible */
+#define FST_DEF_MTU 1500 /* Common sane value */
+
+#define FST_TX_TIMEOUT (2 * HZ)
+
+#ifdef ARPHRD_RAWHDLC
+#define ARPHRD_MYTYPE ARPHRD_RAWHDLC /* Raw frames */
+#else
+#define ARPHRD_MYTYPE ARPHRD_HDLC /* Cisco-HDLC (keepalives etc) */
+#endif
+
+/* Modules parameters and associated variables
+ */
+static int fst_txq_low = FST_LOW_WATER_MARK;
+static int fst_txq_high = FST_HIGH_WATER_MARK;
+static int fst_max_reads = 7;
+static int fst_excluded_cards;
+static int fst_excluded_list[FST_MAX_CARDS];
+
+module_param(fst_txq_low, int, 0);
+module_param(fst_txq_high, int, 0);
+module_param(fst_max_reads, int, 0);
+module_param(fst_excluded_cards, int, 0);
+module_param_array(fst_excluded_list, int, NULL, 0);
+
+/* Card shared memory layout
+ * =========================
+ */
+#pragma pack(1)
+
+/* This information is derived in part from the FarSite FarSync Smc.h
+ * file. Unfortunately various name clashes and the non-portability of the
+ * bit field declarations in that file have meant that I have chosen to
+ * recreate the information here.
+ *
+ * The SMC (Shared Memory Configuration) has a version number that is
+ * incremented every time there is a significant change. This number can
+ * be used to check that we have not got out of step with the firmware
+ * contained in the .CDE files.
+ */
+#define SMC_VERSION 24
+
+#define FST_MEMSIZE 0x100000 /* Size of card memory (1Mb) */
+
+#define SMC_BASE 0x00002000L /* Base offset of the shared memory window main
+ * configuration structure
+ */
+#define BFM_BASE 0x00010000L /* Base offset of the shared memory window DMA
+ * buffers
+ */
+
+#define LEN_TX_BUFFER 8192 /* Size of packet buffers */
+#define LEN_RX_BUFFER 8192
+
+#define LEN_SMALL_TX_BUFFER 256 /* Size of obsolete buffs used for DOS diags */
+#define LEN_SMALL_RX_BUFFER 256
+
+#define NUM_TX_BUFFER 2 /* Must be power of 2. Fixed by firmware */
+#define NUM_RX_BUFFER 8
+
+/* Interrupt retry time in milliseconds */
+#define INT_RETRY_TIME 2
+
+/* The Am186CH/CC processors support a SmartDMA mode using circular pools
+ * of buffer descriptors. The structure is almost identical to that used
+ * in the LANCE Ethernet controllers. Details available as PDF from the
+ * AMD web site: https://www.amd.com/products/epd/processors/\
+ * 2.16bitcont/3.am186cxfa/a21914/21914.pdf
+ */
+struct txdesc { /* Transmit descriptor */
+ volatile u16 ladr; /* Low order address of packet. This is a
+ * linear address in the Am186 memory space
+ */
+ volatile u8 hadr; /* High order address. Low 4 bits only, high 4
+ * bits must be zero
+ */
+ volatile u8 bits; /* Status and config */
+ volatile u16 bcnt; /* 2s complement of packet size in low 15 bits.
+ * Transmit terminal count interrupt enable in
+ * top bit.
+ */
+ u16 unused; /* Not used in Tx */
+};
+
+struct rxdesc { /* Receive descriptor */
+ volatile u16 ladr; /* Low order address of packet */
+ volatile u8 hadr; /* High order address */
+ volatile u8 bits; /* Status and config */
+ volatile u16 bcnt; /* 2s complement of buffer size in low 15 bits.
+ * Receive terminal count interrupt enable in
+ * top bit.
+ */
+ volatile u16 mcnt; /* Message byte count (15 bits) */
+};
+
+/* Convert a length into the 15 bit 2's complement */
+/* #define cnv_bcnt(len) (( ~(len) + 1 ) & 0x7FFF ) */
+/* Since we need to set the high bit to enable the completion interrupt this
+ * can be made a lot simpler
+ */
+#define cnv_bcnt(len) (-(len))
+
+/* Status and config bits for the above */
+#define DMA_OWN 0x80 /* SmartDMA owns the descriptor */
+#define TX_STP 0x02 /* Tx: start of packet */
+#define TX_ENP 0x01 /* Tx: end of packet */
+#define RX_ERR 0x40 /* Rx: error (OR of next 4 bits) */
+#define RX_FRAM 0x20 /* Rx: framing error */
+#define RX_OFLO 0x10 /* Rx: overflow error */
+#define RX_CRC 0x08 /* Rx: CRC error */
+#define RX_HBUF 0x04 /* Rx: buffer error */
+#define RX_STP 0x02 /* Rx: start of packet */
+#define RX_ENP 0x01 /* Rx: end of packet */
+
+/* Interrupts from the card are caused by various events which are presented
+ * in a circular buffer as several events may be processed on one physical int
+ */
+#define MAX_CIRBUFF 32
+
+struct cirbuff {
+ u8 rdindex; /* read, then increment and wrap */
+ u8 wrindex; /* write, then increment and wrap */
+ u8 evntbuff[MAX_CIRBUFF];
+};
+
+/* Interrupt event codes.
+ * Where appropriate the two low order bits indicate the port number
+ */
+#define CTLA_CHG 0x18 /* Control signal changed */
+#define CTLB_CHG 0x19
+#define CTLC_CHG 0x1A
+#define CTLD_CHG 0x1B
+
+#define INIT_CPLT 0x20 /* Initialisation complete */
+#define INIT_FAIL 0x21 /* Initialisation failed */
+
+#define ABTA_SENT 0x24 /* Abort sent */
+#define ABTB_SENT 0x25
+#define ABTC_SENT 0x26
+#define ABTD_SENT 0x27
+
+#define TXA_UNDF 0x28 /* Transmission underflow */
+#define TXB_UNDF 0x29
+#define TXC_UNDF 0x2A
+#define TXD_UNDF 0x2B
+
+#define F56_INT 0x2C
+#define M32_INT 0x2D
+
+#define TE1_ALMA 0x30
+
+/* Port physical configuration. See farsync.h for field values */
+struct port_cfg {
+ u16 lineInterface; /* Physical interface type */
+ u8 x25op; /* Unused at present */
+ u8 internalClock; /* 1 => internal clock, 0 => external */
+ u8 transparentMode; /* 1 => on, 0 => off */
+ u8 invertClock; /* 0 => normal, 1 => inverted */
+ u8 padBytes[6]; /* Padding */
+ u32 lineSpeed; /* Speed in bps */
+};
+
+/* TE1 port physical configuration */
+struct su_config {
+ u32 dataRate;
+ u8 clocking;
+ u8 framing;
+ u8 structure;
+ u8 interface;
+ u8 coding;
+ u8 lineBuildOut;
+ u8 equalizer;
+ u8 transparentMode;
+ u8 loopMode;
+ u8 range;
+ u8 txBufferMode;
+ u8 rxBufferMode;
+ u8 startingSlot;
+ u8 losThreshold;
+ u8 enableIdleCode;
+ u8 idleCode;
+ u8 spare[44];
+};
+
+/* TE1 Status */
+struct su_status {
+ u32 receiveBufferDelay;
+ u32 framingErrorCount;
+ u32 codeViolationCount;
+ u32 crcErrorCount;
+ u32 lineAttenuation;
+ u8 portStarted;
+ u8 lossOfSignal;
+ u8 receiveRemoteAlarm;
+ u8 alarmIndicationSignal;
+ u8 spare[40];
+};
+
+/* Finally sling all the above together into the shared memory structure.
+ * Sorry it's a hodge podge of arrays, structures and unused bits, it's been
+ * evolving under NT for some time so I guess we're stuck with it.
+ * The structure starts at offset SMC_BASE.
+ * See farsync.h for some field values.
+ */
+struct fst_shared {
+ /* DMA descriptor rings */
+ struct rxdesc rxDescrRing[FST_MAX_PORTS][NUM_RX_BUFFER];
+ struct txdesc txDescrRing[FST_MAX_PORTS][NUM_TX_BUFFER];
+
+ /* Obsolete small buffers */
+ u8 smallRxBuffer[FST_MAX_PORTS][NUM_RX_BUFFER][LEN_SMALL_RX_BUFFER];
+ u8 smallTxBuffer[FST_MAX_PORTS][NUM_TX_BUFFER][LEN_SMALL_TX_BUFFER];
+
+ u8 taskStatus; /* 0x00 => initialising, 0x01 => running,
+ * 0xFF => halted
+ */
+
+ u8 interruptHandshake; /* Set to 0x01 by adapter to signal interrupt,
+ * set to 0xEE by host to acknowledge interrupt
+ */
+
+ u16 smcVersion; /* Must match SMC_VERSION */
+
+ u32 smcFirmwareVersion; /* 0xIIVVRRBB where II = product ID, VV = major
+ * version, RR = revision and BB = build
+ */
+
+ u16 txa_done; /* Obsolete completion flags */
+ u16 rxa_done;
+ u16 txb_done;
+ u16 rxb_done;
+ u16 txc_done;
+ u16 rxc_done;
+ u16 txd_done;
+ u16 rxd_done;
+
+ u16 mailbox[4]; /* Diagnostics mailbox. Not used */
+
+ struct cirbuff interruptEvent; /* interrupt causes */
+
+ u32 v24IpSts[FST_MAX_PORTS]; /* V.24 control input status */
+ u32 v24OpSts[FST_MAX_PORTS]; /* V.24 control output status */
+
+ struct port_cfg portConfig[FST_MAX_PORTS];
+
+ u16 clockStatus[FST_MAX_PORTS]; /* lsb: 0=> present, 1=> absent */
+
+ u16 cableStatus; /* lsb: 0=> present, 1=> absent */
+
+ u16 txDescrIndex[FST_MAX_PORTS]; /* transmit descriptor ring index */
+ u16 rxDescrIndex[FST_MAX_PORTS]; /* receive descriptor ring index */
+
+ u16 portMailbox[FST_MAX_PORTS][2]; /* command, modifier */
+ u16 cardMailbox[4]; /* Not used */
+
+ /* Number of times the card thinks the host has
+ * missed an interrupt by not acknowledging
+ * within 2mS (I guess NT has problems)
+ */
+ u32 interruptRetryCount;
+
+ /* Driver private data used as an ID. We'll not
+ * use this as I'd rather keep such things
+ * in main memory rather than on the PCI bus
+ */
+ u32 portHandle[FST_MAX_PORTS];
+
+ /* Count of Tx underflows for stats */
+ u32 transmitBufferUnderflow[FST_MAX_PORTS];
+
+ /* Debounced V.24 control input status */
+ u32 v24DebouncedSts[FST_MAX_PORTS];
+
+ /* Adapter debounce timers. Don't touch */
+ u32 ctsTimer[FST_MAX_PORTS];
+ u32 ctsTimerRun[FST_MAX_PORTS];
+ u32 dcdTimer[FST_MAX_PORTS];
+ u32 dcdTimerRun[FST_MAX_PORTS];
+
+ u32 numberOfPorts; /* Number of ports detected at startup */
+
+ u16 _reserved[64];
+
+ u16 cardMode; /* Bit-mask to enable features:
+ * Bit 0: 1 enables LED identify mode
+ */
+
+ u16 portScheduleOffset;
+
+ struct su_config suConfig; /* TE1 Bits */
+ struct su_status suStatus;
+
+ u32 endOfSmcSignature; /* endOfSmcSignature MUST be the last member of
+ * the structure and marks the end of shared
+ * memory. Adapter code initializes it as
+ * END_SIG.
+ */
+};
+
+/* endOfSmcSignature value */
+#define END_SIG 0x12345678
+
+/* Mailbox values. (portMailbox) */
+#define NOP 0 /* No operation */
+#define ACK 1 /* Positive acknowledgement to PC driver */
+#define NAK 2 /* Negative acknowledgement to PC driver */
+#define STARTPORT 3 /* Start an HDLC port */
+#define STOPPORT 4 /* Stop an HDLC port */
+#define ABORTTX 5 /* Abort the transmitter for a port */
+#define SETV24O 6 /* Set V24 outputs */
+
+/* PLX Chip Register Offsets */
+#define CNTRL_9052 0x50 /* Control Register */
+#define CNTRL_9054 0x6c /* Control Register */
+
+#define INTCSR_9052 0x4c /* Interrupt control/status register */
+#define INTCSR_9054 0x68 /* Interrupt control/status register */
+
+/* 9054 DMA Registers */
+/* Note that we will be using DMA Channel 0 for copying rx data
+ * and Channel 1 for copying tx data
+ */
+#define DMAMODE0 0x80
+#define DMAPADR0 0x84
+#define DMALADR0 0x88
+#define DMASIZ0 0x8c
+#define DMADPR0 0x90
+#define DMAMODE1 0x94
+#define DMAPADR1 0x98
+#define DMALADR1 0x9c
+#define DMASIZ1 0xa0
+#define DMADPR1 0xa4
+#define DMACSR0 0xa8
+#define DMACSR1 0xa9
+#define DMAARB 0xac
+#define DMATHR 0xb0
+#define DMADAC0 0xb4
+#define DMADAC1 0xb8
+#define DMAMARBR 0xac
+
+#define FST_MIN_DMA_LEN 64
+#define FST_RX_DMA_INT 0x01
+#define FST_TX_DMA_INT 0x02
+#define FST_CARD_INT 0x04
+
+/* Larger buffers are positioned in memory at offset BFM_BASE */
+struct buf_window {
+ u8 txBuffer[FST_MAX_PORTS][NUM_TX_BUFFER][LEN_TX_BUFFER];
+ u8 rxBuffer[FST_MAX_PORTS][NUM_RX_BUFFER][LEN_RX_BUFFER];
+};
+
+/* Calculate offset of a buffer object within the shared memory window */
+#define BUF_OFFSET(X) (BFM_BASE + offsetof(struct buf_window, X))
+
+#pragma pack()
+
+/* Device driver private information
+ * =================================
+ */
+/* Per port (line or channel) information
+ */
+struct fst_port_info {
+ struct net_device *dev; /* Device struct - must be first */
+ struct fst_card_info *card; /* Card we're associated with */
+ int index; /* Port index on the card */
+ int hwif; /* Line hardware (lineInterface copy) */
+ int run; /* Port is running */
+ int mode; /* Normal or FarSync raw */
+ int rxpos; /* Next Rx buffer to use */
+ int txpos; /* Next Tx buffer to use */
+ int txipos; /* Next Tx buffer to check for free */
+ int start; /* Indication of start/stop to network */
+ /* A sixteen entry transmit queue
+ */
+ int txqs; /* index to get next buffer to tx */
+ int txqe; /* index to queue next packet */
+ struct sk_buff *txq[FST_TXQ_DEPTH]; /* The queue */
+ int rxqdepth;
+};
+
+/* Per card information
+ */
+struct fst_card_info {
+ char __iomem *mem; /* Card memory mapped to kernel space */
+ char __iomem *ctlmem; /* Control memory for PCI cards */
+ unsigned int phys_mem; /* Physical memory window address */
+ unsigned int phys_ctlmem; /* Physical control memory address */
+ unsigned int irq; /* Interrupt request line number */
+ unsigned int nports; /* Number of serial ports */
+ unsigned int type; /* Type index of card */
+ unsigned int state; /* State of card */
+ spinlock_t card_lock; /* Lock for SMP access */
+ unsigned short pci_conf; /* PCI card config in I/O space */
+ /* Per port info */
+ struct fst_port_info ports[FST_MAX_PORTS];
+ struct pci_dev *device; /* Information about the pci device */
+ int card_no; /* Inst of the card on the system */
+ int family; /* TxP or TxU */
+ int dmarx_in_progress;
+ int dmatx_in_progress;
+ unsigned long int_count;
+ unsigned long int_time_ave;
+ void *rx_dma_handle_host;
+ dma_addr_t rx_dma_handle_card;
+ void *tx_dma_handle_host;
+ dma_addr_t tx_dma_handle_card;
+ struct sk_buff *dma_skb_rx;
+ struct fst_port_info *dma_port_rx;
+ struct fst_port_info *dma_port_tx;
+ int dma_len_rx;
+ int dma_len_tx;
+ int dma_txpos;
+ int dma_rxpos;
+};
+
+/* Convert an HDLC device pointer into a port info pointer and similar */
+#define dev_to_port(D) (dev_to_hdlc(D)->priv)
+#define port_to_dev(P) ((P)->dev)
+
+/* Shared memory window access macros
+ *
+ * We have a nice memory based structure above, which could be directly
+ * mapped on i386 but might not work on other architectures unless we use
+ * the readb,w,l and writeb,w,l macros. Unfortunately these macros take
+ * physical offsets so we have to convert. The only saving grace is that
+ * this should all collapse back to a simple indirection eventually.
+ */
+#define WIN_OFFSET(X) ((long)&(((struct fst_shared *)SMC_BASE)->X))
+
+#define FST_RDB(C, E) (readb((C)->mem + WIN_OFFSET(E)))
+#define FST_RDW(C, E) (readw((C)->mem + WIN_OFFSET(E)))
+#define FST_RDL(C, E) (readl((C)->mem + WIN_OFFSET(E)))
+
+#define FST_WRB(C, E, B) (writeb((B), (C)->mem + WIN_OFFSET(E)))
+#define FST_WRW(C, E, W) (writew((W), (C)->mem + WIN_OFFSET(E)))
+#define FST_WRL(C, E, L) (writel((L), (C)->mem + WIN_OFFSET(E)))
+
+/* Debug support
+ */
+#if FST_DEBUG
+
+static int fst_debug_mask = { FST_DEBUG };
+
+/* Most common debug activity is to print something if the corresponding bit
+ * is set in the debug mask. Note: this uses a non-ANSI extension in GCC to
+ * support variable numbers of macro parameters. The inverted if prevents us
+ * eating someone else's else clause.
+ */
+#define dbg(F, fmt, args...) \
+do { \
+ if (fst_debug_mask & (F)) \
+ printk(KERN_DEBUG pr_fmt(fmt), ##args); \
+} while (0)
+#else
+#define dbg(F, fmt, args...) \
+do { \
+ if (0) \
+ printk(KERN_DEBUG pr_fmt(fmt), ##args); \
+} while (0)
+#endif
+
+/* PCI ID lookup table
+ */
+static const struct pci_device_id fst_pci_dev_id[] = {
+ {PCI_VENDOR_ID_FARSITE, PCI_DEVICE_ID_FARSITE_T2P, PCI_ANY_ID,
+ PCI_ANY_ID, 0, 0, FST_TYPE_T2P},
+
+ {PCI_VENDOR_ID_FARSITE, PCI_DEVICE_ID_FARSITE_T4P, PCI_ANY_ID,
+ PCI_ANY_ID, 0, 0, FST_TYPE_T4P},
+
+ {PCI_VENDOR_ID_FARSITE, PCI_DEVICE_ID_FARSITE_T1U, PCI_ANY_ID,
+ PCI_ANY_ID, 0, 0, FST_TYPE_T1U},
+
+ {PCI_VENDOR_ID_FARSITE, PCI_DEVICE_ID_FARSITE_T2U, PCI_ANY_ID,
+ PCI_ANY_ID, 0, 0, FST_TYPE_T2U},
+
+ {PCI_VENDOR_ID_FARSITE, PCI_DEVICE_ID_FARSITE_T4U, PCI_ANY_ID,
+ PCI_ANY_ID, 0, 0, FST_TYPE_T4U},
+
+ {PCI_VENDOR_ID_FARSITE, PCI_DEVICE_ID_FARSITE_TE1, PCI_ANY_ID,
+ PCI_ANY_ID, 0, 0, FST_TYPE_TE1},
+
+ {PCI_VENDOR_ID_FARSITE, PCI_DEVICE_ID_FARSITE_TE1C, PCI_ANY_ID,
+ PCI_ANY_ID, 0, 0, FST_TYPE_TE1},
+ {0,} /* End */
+};
+
+MODULE_DEVICE_TABLE(pci, fst_pci_dev_id);
+
+/* Device Driver Work Queues
+ *
+ * So that we don't spend too much time processing events in the
+ * Interrupt Service routine, we will declare a work queue per Card
+ * and make the ISR schedule a task in the queue for later execution.
+ * In the 2.4 Kernel we used to use the immediate queue for BH's
+ * Now that they are gone, tasklets seem to be much better than work
+ * queues.
+ */
+
+static void do_bottom_half_tx(struct fst_card_info *card);
+static void do_bottom_half_rx(struct fst_card_info *card);
+static void fst_process_tx_work_q(struct tasklet_struct *unused);
+static void fst_process_int_work_q(struct tasklet_struct *unused);
+
+static DECLARE_TASKLET(fst_tx_task, fst_process_tx_work_q);
+static DECLARE_TASKLET(fst_int_task, fst_process_int_work_q);
+
+static struct fst_card_info *fst_card_array[FST_MAX_CARDS];
+static DEFINE_SPINLOCK(fst_work_q_lock);
+static u64 fst_work_txq;
+static u64 fst_work_intq;
+
+static void
+fst_q_work_item(u64 *queue, int card_index)
+{
+ unsigned long flags;
+ u64 mask;
+
+ /* Grab the queue exclusively
+ */
+ spin_lock_irqsave(&fst_work_q_lock, flags);
+
+ /* Making an entry in the queue is simply a matter of setting
+ * a bit for the card indicating that there is work to do in the
+ * bottom half for the card. Note the limitation of 64 cards.
+ * That ought to be enough
+ */
+ mask = (u64)1 << card_index;
+ *queue |= mask;
+ spin_unlock_irqrestore(&fst_work_q_lock, flags);
+}
+
+static void
+fst_process_tx_work_q(struct tasklet_struct *unused)
+{
+ unsigned long flags;
+ u64 work_txq;
+ int i;
+
+ /* Grab the queue exclusively
+ */
+ dbg(DBG_TX, "fst_process_tx_work_q\n");
+ spin_lock_irqsave(&fst_work_q_lock, flags);
+ work_txq = fst_work_txq;
+ fst_work_txq = 0;
+ spin_unlock_irqrestore(&fst_work_q_lock, flags);
+
+ /* Call the bottom half for each card with work waiting
+ */
+ for (i = 0; i < FST_MAX_CARDS; i++) {
+ if (work_txq & 0x01) {
+ if (fst_card_array[i]) {
+ dbg(DBG_TX, "Calling tx bh for card %d\n", i);
+ do_bottom_half_tx(fst_card_array[i]);
+ }
+ }
+ work_txq = work_txq >> 1;
+ }
+}
+
+static void
+fst_process_int_work_q(struct tasklet_struct *unused)
+{
+ unsigned long flags;
+ u64 work_intq;
+ int i;
+
+ /* Grab the queue exclusively
+ */
+ dbg(DBG_INTR, "fst_process_int_work_q\n");
+ spin_lock_irqsave(&fst_work_q_lock, flags);
+ work_intq = fst_work_intq;
+ fst_work_intq = 0;
+ spin_unlock_irqrestore(&fst_work_q_lock, flags);
+
+ /* Call the bottom half for each card with work waiting
+ */
+ for (i = 0; i < FST_MAX_CARDS; i++) {
+ if (work_intq & 0x01) {
+ if (fst_card_array[i]) {
+ dbg(DBG_INTR,
+ "Calling rx & tx bh for card %d\n", i);
+ do_bottom_half_rx(fst_card_array[i]);
+ do_bottom_half_tx(fst_card_array[i]);
+ }
+ }
+ work_intq = work_intq >> 1;
+ }
+}
+
+/* Card control functions
+ * ======================
+ */
+/* Place the processor in reset state
+ *
+ * Used to be a simple write to card control space but a glitch in the latest
+ * AMD Am186CH processor means that we now have to do it by asserting and de-
+ * asserting the PLX chip PCI Adapter Software Reset. Bit 30 in CNTRL register
+ * at offset 9052_CNTRL. Note the updates for the TXU.
+ */
+static inline void
+fst_cpureset(struct fst_card_info *card)
+{
+ unsigned char interrupt_line_register;
+ unsigned int regval;
+
+ if (card->family == FST_FAMILY_TXU) {
+ if (pci_read_config_byte
+ (card->device, PCI_INTERRUPT_LINE, &interrupt_line_register)) {
+ dbg(DBG_ASS,
+ "Error in reading interrupt line register\n");
+ }
+ /* Assert PLX software reset and Am186 hardware reset
+ * and then deassert the PLX software reset but 186 still in reset
+ */
+ outw(0x440f, card->pci_conf + CNTRL_9054 + 2);
+ outw(0x040f, card->pci_conf + CNTRL_9054 + 2);
+ /* We are delaying here to allow the 9054 to reset itself
+ */
+ usleep_range(10, 20);
+ outw(0x240f, card->pci_conf + CNTRL_9054 + 2);
+ /* We are delaying here to allow the 9054 to reload its eeprom
+ */
+ usleep_range(10, 20);
+ outw(0x040f, card->pci_conf + CNTRL_9054 + 2);
+
+ if (pci_write_config_byte
+ (card->device, PCI_INTERRUPT_LINE, interrupt_line_register)) {
+ dbg(DBG_ASS,
+ "Error in writing interrupt line register\n");
+ }
+
+ } else {
+ regval = inl(card->pci_conf + CNTRL_9052);
+
+ outl(regval | 0x40000000, card->pci_conf + CNTRL_9052);
+ outl(regval & ~0x40000000, card->pci_conf + CNTRL_9052);
+ }
+}
+
+/* Release the processor from reset
+ */
+static inline void
+fst_cpurelease(struct fst_card_info *card)
+{
+ if (card->family == FST_FAMILY_TXU) {
+ /* Force posted writes to complete
+ */
+ (void)readb(card->mem);
+
+ /* Release LRESET DO = 1
+ * Then release Local Hold, DO = 1
+ */
+ outw(0x040e, card->pci_conf + CNTRL_9054 + 2);
+ outw(0x040f, card->pci_conf + CNTRL_9054 + 2);
+ } else {
+ (void)readb(card->ctlmem);
+ }
+}
+
+/* Clear the cards interrupt flag
+ */
+static inline void
+fst_clear_intr(struct fst_card_info *card)
+{
+ if (card->family == FST_FAMILY_TXU) {
+ (void)readb(card->ctlmem);
+ } else {
+ /* Poke the appropriate PLX chip register (same as enabling interrupts)
+ */
+ outw(0x0543, card->pci_conf + INTCSR_9052);
+ }
+}
+
+/* Enable card interrupts
+ */
+static inline void
+fst_enable_intr(struct fst_card_info *card)
+{
+ if (card->family == FST_FAMILY_TXU)
+ outl(0x0f0c0900, card->pci_conf + INTCSR_9054);
+ else
+ outw(0x0543, card->pci_conf + INTCSR_9052);
+}
+
+/* Disable card interrupts
+ */
+static inline void
+fst_disable_intr(struct fst_card_info *card)
+{
+ if (card->family == FST_FAMILY_TXU)
+ outl(0x00000000, card->pci_conf + INTCSR_9054);
+ else
+ outw(0x0000, card->pci_conf + INTCSR_9052);
+}
+
+/* Process the result of trying to pass a received frame up the stack
+ */
+static void
+fst_process_rx_status(int rx_status, char *name)
+{
+ switch (rx_status) {
+ case NET_RX_SUCCESS:
+ {
+ /* Nothing to do here
+ */
+ break;
+ }
+ case NET_RX_DROP:
+ {
+ dbg(DBG_ASS, "%s: Received packet dropped\n", name);
+ break;
+ }
+ }
+}
+
+/* Initilaise DMA for PLX 9054
+ */
+static inline void
+fst_init_dma(struct fst_card_info *card)
+{
+ /* This is only required for the PLX 9054
+ */
+ if (card->family == FST_FAMILY_TXU) {
+ pci_set_master(card->device);
+ outl(0x00020441, card->pci_conf + DMAMODE0);
+ outl(0x00020441, card->pci_conf + DMAMODE1);
+ outl(0x0, card->pci_conf + DMATHR);
+ }
+}
+
+/* Tx dma complete interrupt
+ */
+static void
+fst_tx_dma_complete(struct fst_card_info *card, struct fst_port_info *port,
+ int len, int txpos)
+{
+ struct net_device *dev = port_to_dev(port);
+
+ /* Everything is now set, just tell the card to go
+ */
+ dbg(DBG_TX, "fst_tx_dma_complete\n");
+ FST_WRB(card, txDescrRing[port->index][txpos].bits,
+ DMA_OWN | TX_STP | TX_ENP);
+ dev->stats.tx_packets++;
+ dev->stats.tx_bytes += len;
+ netif_trans_update(dev);
+}
+
+/* Mark it for our own raw sockets interface
+ */
+static __be16 farsync_type_trans(struct sk_buff *skb, struct net_device *dev)
+{
+ skb->dev = dev;
+ skb_reset_mac_header(skb);
+ skb->pkt_type = PACKET_HOST;
+ return htons(ETH_P_CUST);
+}
+
+/* Rx dma complete interrupt
+ */
+static void
+fst_rx_dma_complete(struct fst_card_info *card, struct fst_port_info *port,
+ int len, struct sk_buff *skb, int rxp)
+{
+ struct net_device *dev = port_to_dev(port);
+ int pi;
+ int rx_status;
+
+ dbg(DBG_TX, "fst_rx_dma_complete\n");
+ pi = port->index;
+ skb_put_data(skb, card->rx_dma_handle_host, len);
+
+ /* Reset buffer descriptor */
+ FST_WRB(card, rxDescrRing[pi][rxp].bits, DMA_OWN);
+
+ /* Update stats */
+ dev->stats.rx_packets++;
+ dev->stats.rx_bytes += len;
+
+ /* Push upstream */
+ dbg(DBG_RX, "Pushing the frame up the stack\n");
+ if (port->mode == FST_RAW)
+ skb->protocol = farsync_type_trans(skb, dev);
+ else
+ skb->protocol = hdlc_type_trans(skb, dev);
+ rx_status = netif_rx(skb);
+ fst_process_rx_status(rx_status, port_to_dev(port)->name);
+ if (rx_status == NET_RX_DROP)
+ dev->stats.rx_dropped++;
+}
+
+/* Receive a frame through the DMA
+ */
+static inline void
+fst_rx_dma(struct fst_card_info *card, dma_addr_t dma, u32 mem, int len)
+{
+ /* This routine will setup the DMA and start it
+ */
+
+ dbg(DBG_RX, "In fst_rx_dma %x %x %d\n", (u32)dma, mem, len);
+ if (card->dmarx_in_progress)
+ dbg(DBG_ASS, "In fst_rx_dma while dma in progress\n");
+
+ outl(dma, card->pci_conf + DMAPADR0); /* Copy to here */
+ outl(mem, card->pci_conf + DMALADR0); /* from here */
+ outl(len, card->pci_conf + DMASIZ0); /* for this length */
+ outl(0x00000000c, card->pci_conf + DMADPR0); /* In this direction */
+
+ /* We use the dmarx_in_progress flag to flag the channel as busy
+ */
+ card->dmarx_in_progress = 1;
+ outb(0x03, card->pci_conf + DMACSR0); /* Start the transfer */
+}
+
+/* Send a frame through the DMA
+ */
+static inline void
+fst_tx_dma(struct fst_card_info *card, dma_addr_t dma, u32 mem, int len)
+{
+ /* This routine will setup the DMA and start it.
+ */
+
+ dbg(DBG_TX, "In fst_tx_dma %x %x %d\n", (u32)dma, mem, len);
+ if (card->dmatx_in_progress)
+ dbg(DBG_ASS, "In fst_tx_dma while dma in progress\n");
+
+ outl(dma, card->pci_conf + DMAPADR1); /* Copy from here */
+ outl(mem, card->pci_conf + DMALADR1); /* to here */
+ outl(len, card->pci_conf + DMASIZ1); /* for this length */
+ outl(0x000000004, card->pci_conf + DMADPR1); /* In this direction */
+
+ /* We use the dmatx_in_progress to flag the channel as busy
+ */
+ card->dmatx_in_progress = 1;
+ outb(0x03, card->pci_conf + DMACSR1); /* Start the transfer */
+}
+
+/* Issue a Mailbox command for a port.
+ * Note we issue them on a fire and forget basis, not expecting to see an
+ * error and not waiting for completion.
+ */
+static void
+fst_issue_cmd(struct fst_port_info *port, unsigned short cmd)
+{
+ struct fst_card_info *card;
+ unsigned short mbval;
+ unsigned long flags;
+ int safety;
+
+ card = port->card;
+ spin_lock_irqsave(&card->card_lock, flags);
+ mbval = FST_RDW(card, portMailbox[port->index][0]);
+
+ safety = 0;
+ /* Wait for any previous command to complete */
+ while (mbval > NAK) {
+ spin_unlock_irqrestore(&card->card_lock, flags);
+ schedule_timeout_uninterruptible(1);
+ spin_lock_irqsave(&card->card_lock, flags);
+
+ if (++safety > 2000) {
+ pr_err("Mailbox safety timeout\n");
+ break;
+ }
+
+ mbval = FST_RDW(card, portMailbox[port->index][0]);
+ }
+ if (safety > 0)
+ dbg(DBG_CMD, "Mailbox clear after %d jiffies\n", safety);
+
+ if (mbval == NAK)
+ dbg(DBG_CMD, "issue_cmd: previous command was NAK'd\n");
+
+ FST_WRW(card, portMailbox[port->index][0], cmd);
+
+ if (cmd == ABORTTX || cmd == STARTPORT) {
+ port->txpos = 0;
+ port->txipos = 0;
+ port->start = 0;
+ }
+
+ spin_unlock_irqrestore(&card->card_lock, flags);
+}
+
+/* Port output signals control
+ */
+static inline void
+fst_op_raise(struct fst_port_info *port, unsigned int outputs)
+{
+ outputs |= FST_RDL(port->card, v24OpSts[port->index]);
+ FST_WRL(port->card, v24OpSts[port->index], outputs);
+
+ if (port->run)
+ fst_issue_cmd(port, SETV24O);
+}
+
+static inline void
+fst_op_lower(struct fst_port_info *port, unsigned int outputs)
+{
+ outputs = ~outputs & FST_RDL(port->card, v24OpSts[port->index]);
+ FST_WRL(port->card, v24OpSts[port->index], outputs);
+
+ if (port->run)
+ fst_issue_cmd(port, SETV24O);
+}
+
+/* Setup port Rx buffers
+ */
+static void
+fst_rx_config(struct fst_port_info *port)
+{
+ int i;
+ int pi;
+ unsigned int offset;
+ unsigned long flags;
+ struct fst_card_info *card;
+
+ pi = port->index;
+ card = port->card;
+ spin_lock_irqsave(&card->card_lock, flags);
+ for (i = 0; i < NUM_RX_BUFFER; i++) {
+ offset = BUF_OFFSET(rxBuffer[pi][i][0]);
+
+ FST_WRW(card, rxDescrRing[pi][i].ladr, (u16)offset);
+ FST_WRB(card, rxDescrRing[pi][i].hadr, (u8)(offset >> 16));
+ FST_WRW(card, rxDescrRing[pi][i].bcnt, cnv_bcnt(LEN_RX_BUFFER));
+ FST_WRW(card, rxDescrRing[pi][i].mcnt, LEN_RX_BUFFER);
+ FST_WRB(card, rxDescrRing[pi][i].bits, DMA_OWN);
+ }
+ port->rxpos = 0;
+ spin_unlock_irqrestore(&card->card_lock, flags);
+}
+
+/* Setup port Tx buffers
+ */
+static void
+fst_tx_config(struct fst_port_info *port)
+{
+ int i;
+ int pi;
+ unsigned int offset;
+ unsigned long flags;
+ struct fst_card_info *card;
+
+ pi = port->index;
+ card = port->card;
+ spin_lock_irqsave(&card->card_lock, flags);
+ for (i = 0; i < NUM_TX_BUFFER; i++) {
+ offset = BUF_OFFSET(txBuffer[pi][i][0]);
+
+ FST_WRW(card, txDescrRing[pi][i].ladr, (u16)offset);
+ FST_WRB(card, txDescrRing[pi][i].hadr, (u8)(offset >> 16));
+ FST_WRW(card, txDescrRing[pi][i].bcnt, 0);
+ FST_WRB(card, txDescrRing[pi][i].bits, 0);
+ }
+ port->txpos = 0;
+ port->txipos = 0;
+ port->start = 0;
+ spin_unlock_irqrestore(&card->card_lock, flags);
+}
+
+/* TE1 Alarm change interrupt event
+ */
+static void
+fst_intr_te1_alarm(struct fst_card_info *card, struct fst_port_info *port)
+{
+ u8 los;
+ u8 rra;
+ u8 ais;
+
+ los = FST_RDB(card, suStatus.lossOfSignal);
+ rra = FST_RDB(card, suStatus.receiveRemoteAlarm);
+ ais = FST_RDB(card, suStatus.alarmIndicationSignal);
+
+ if (los) {
+ /* Lost the link
+ */
+ if (netif_carrier_ok(port_to_dev(port))) {
+ dbg(DBG_INTR, "Net carrier off\n");
+ netif_carrier_off(port_to_dev(port));
+ }
+ } else {
+ /* Link available
+ */
+ if (!netif_carrier_ok(port_to_dev(port))) {
+ dbg(DBG_INTR, "Net carrier on\n");
+ netif_carrier_on(port_to_dev(port));
+ }
+ }
+
+ if (los)
+ dbg(DBG_INTR, "Assert LOS Alarm\n");
+ else
+ dbg(DBG_INTR, "De-assert LOS Alarm\n");
+ if (rra)
+ dbg(DBG_INTR, "Assert RRA Alarm\n");
+ else
+ dbg(DBG_INTR, "De-assert RRA Alarm\n");
+
+ if (ais)
+ dbg(DBG_INTR, "Assert AIS Alarm\n");
+ else
+ dbg(DBG_INTR, "De-assert AIS Alarm\n");
+}
+
+/* Control signal change interrupt event
+ */
+static void
+fst_intr_ctlchg(struct fst_card_info *card, struct fst_port_info *port)
+{
+ int signals;
+
+ signals = FST_RDL(card, v24DebouncedSts[port->index]);
+
+ if (signals & ((port->hwif == X21 || port->hwif == X21D)
+ ? IPSTS_INDICATE : IPSTS_DCD)) {
+ if (!netif_carrier_ok(port_to_dev(port))) {
+ dbg(DBG_INTR, "DCD active\n");
+ netif_carrier_on(port_to_dev(port));
+ }
+ } else {
+ if (netif_carrier_ok(port_to_dev(port))) {
+ dbg(DBG_INTR, "DCD lost\n");
+ netif_carrier_off(port_to_dev(port));
+ }
+ }
+}
+
+/* Log Rx Errors
+ */
+static void
+fst_log_rx_error(struct fst_card_info *card, struct fst_port_info *port,
+ unsigned char dmabits, int rxp, unsigned short len)
+{
+ struct net_device *dev = port_to_dev(port);
+
+ /* Increment the appropriate error counter
+ */
+ dev->stats.rx_errors++;
+ if (dmabits & RX_OFLO) {
+ dev->stats.rx_fifo_errors++;
+ dbg(DBG_ASS, "Rx fifo error on card %d port %d buffer %d\n",
+ card->card_no, port->index, rxp);
+ }
+ if (dmabits & RX_CRC) {
+ dev->stats.rx_crc_errors++;
+ dbg(DBG_ASS, "Rx crc error on card %d port %d\n",
+ card->card_no, port->index);
+ }
+ if (dmabits & RX_FRAM) {
+ dev->stats.rx_frame_errors++;
+ dbg(DBG_ASS, "Rx frame error on card %d port %d\n",
+ card->card_no, port->index);
+ }
+ if (dmabits == (RX_STP | RX_ENP)) {
+ dev->stats.rx_length_errors++;
+ dbg(DBG_ASS, "Rx length error (%d) on card %d port %d\n",
+ len, card->card_no, port->index);
+ }
+}
+
+/* Rx Error Recovery
+ */
+static void
+fst_recover_rx_error(struct fst_card_info *card, struct fst_port_info *port,
+ unsigned char dmabits, int rxp, unsigned short len)
+{
+ int i;
+ int pi;
+
+ pi = port->index;
+ /* Discard buffer descriptors until we see the start of the
+ * next frame. Note that for long frames this could be in
+ * a subsequent interrupt.
+ */
+ i = 0;
+ while ((dmabits & (DMA_OWN | RX_STP)) == 0) {
+ FST_WRB(card, rxDescrRing[pi][rxp].bits, DMA_OWN);
+ rxp = (rxp + 1) % NUM_RX_BUFFER;
+ if (++i > NUM_RX_BUFFER) {
+ dbg(DBG_ASS, "intr_rx: Discarding more bufs"
+ " than we have\n");
+ break;
+ }
+ dmabits = FST_RDB(card, rxDescrRing[pi][rxp].bits);
+ dbg(DBG_ASS, "DMA Bits of next buffer was %x\n", dmabits);
+ }
+ dbg(DBG_ASS, "There were %d subsequent buffers in error\n", i);
+
+ /* Discard the terminal buffer */
+ if (!(dmabits & DMA_OWN)) {
+ FST_WRB(card, rxDescrRing[pi][rxp].bits, DMA_OWN);
+ rxp = (rxp + 1) % NUM_RX_BUFFER;
+ }
+ port->rxpos = rxp;
+}
+
+/* Rx complete interrupt
+ */
+static void
+fst_intr_rx(struct fst_card_info *card, struct fst_port_info *port)
+{
+ unsigned char dmabits;
+ int pi;
+ int rxp;
+ int rx_status;
+ unsigned short len;
+ struct sk_buff *skb;
+ struct net_device *dev = port_to_dev(port);
+
+ /* Check we have a buffer to process */
+ pi = port->index;
+ rxp = port->rxpos;
+ dmabits = FST_RDB(card, rxDescrRing[pi][rxp].bits);
+ if (dmabits & DMA_OWN) {
+ dbg(DBG_RX | DBG_INTR, "intr_rx: No buffer port %d pos %d\n",
+ pi, rxp);
+ return;
+ }
+ if (card->dmarx_in_progress)
+ return;
+
+ /* Get buffer length */
+ len = FST_RDW(card, rxDescrRing[pi][rxp].mcnt);
+ /* Discard the CRC */
+ len -= 2;
+ if (len == 0) {
+ /* This seems to happen on the TE1 interface sometimes
+ * so throw the frame away and log the event.
+ */
+ pr_err("Frame received with 0 length. Card %d Port %d\n",
+ card->card_no, port->index);
+ /* Return descriptor to card */
+ FST_WRB(card, rxDescrRing[pi][rxp].bits, DMA_OWN);
+
+ rxp = (rxp + 1) % NUM_RX_BUFFER;
+ port->rxpos = rxp;
+ return;
+ }
+
+ /* Check buffer length and for other errors. We insist on one packet
+ * in one buffer. This simplifies things greatly and since we've
+ * allocated 8K it shouldn't be a real world limitation
+ */
+ dbg(DBG_RX, "intr_rx: %d,%d: flags %x len %d\n", pi, rxp, dmabits, len);
+ if (dmabits != (RX_STP | RX_ENP) || len > LEN_RX_BUFFER - 2) {
+ fst_log_rx_error(card, port, dmabits, rxp, len);
+ fst_recover_rx_error(card, port, dmabits, rxp, len);
+ return;
+ }
+
+ /* Allocate SKB */
+ skb = dev_alloc_skb(len);
+ if (!skb) {
+ dbg(DBG_RX, "intr_rx: can't allocate buffer\n");
+
+ dev->stats.rx_dropped++;
+
+ /* Return descriptor to card */
+ FST_WRB(card, rxDescrRing[pi][rxp].bits, DMA_OWN);
+
+ rxp = (rxp + 1) % NUM_RX_BUFFER;
+ port->rxpos = rxp;
+ return;
+ }
+
+ /* We know the length we need to receive, len.
+ * It's not worth using the DMA for reads of less than
+ * FST_MIN_DMA_LEN
+ */
+
+ if (len < FST_MIN_DMA_LEN || card->family == FST_FAMILY_TXP) {
+ memcpy_fromio(skb_put(skb, len),
+ card->mem + BUF_OFFSET(rxBuffer[pi][rxp][0]),
+ len);
+
+ /* Reset buffer descriptor */
+ FST_WRB(card, rxDescrRing[pi][rxp].bits, DMA_OWN);
+
+ /* Update stats */
+ dev->stats.rx_packets++;
+ dev->stats.rx_bytes += len;
+
+ /* Push upstream */
+ dbg(DBG_RX, "Pushing frame up the stack\n");
+ if (port->mode == FST_RAW)
+ skb->protocol = farsync_type_trans(skb, dev);
+ else
+ skb->protocol = hdlc_type_trans(skb, dev);
+ rx_status = netif_rx(skb);
+ fst_process_rx_status(rx_status, port_to_dev(port)->name);
+ if (rx_status == NET_RX_DROP)
+ dev->stats.rx_dropped++;
+ } else {
+ card->dma_skb_rx = skb;
+ card->dma_port_rx = port;
+ card->dma_len_rx = len;
+ card->dma_rxpos = rxp;
+ fst_rx_dma(card, card->rx_dma_handle_card,
+ BUF_OFFSET(rxBuffer[pi][rxp][0]), len);
+ }
+ if (rxp != port->rxpos) {
+ dbg(DBG_ASS, "About to increment rxpos by more than 1\n");
+ dbg(DBG_ASS, "rxp = %d rxpos = %d\n", rxp, port->rxpos);
+ }
+ rxp = (rxp + 1) % NUM_RX_BUFFER;
+ port->rxpos = rxp;
+}
+
+/* The bottom half to the ISR
+ *
+ */
+
+static void
+do_bottom_half_tx(struct fst_card_info *card)
+{
+ struct fst_port_info *port;
+ int pi;
+ int txq_length;
+ struct sk_buff *skb;
+ unsigned long flags;
+ struct net_device *dev;
+
+ /* Find a free buffer for the transmit
+ * Step through each port on this card
+ */
+
+ dbg(DBG_TX, "do_bottom_half_tx\n");
+ for (pi = 0, port = card->ports; pi < card->nports; pi++, port++) {
+ if (!port->run)
+ continue;
+
+ dev = port_to_dev(port);
+ while (!(FST_RDB(card, txDescrRing[pi][port->txpos].bits) &
+ DMA_OWN) &&
+ !(card->dmatx_in_progress)) {
+ /* There doesn't seem to be a txdone event per-se
+ * We seem to have to deduce it, by checking the DMA_OWN
+ * bit on the next buffer we think we can use
+ */
+ spin_lock_irqsave(&card->card_lock, flags);
+ txq_length = port->txqe - port->txqs;
+ if (txq_length < 0) {
+ /* This is the case where one has wrapped and the
+ * maths gives us a negative number
+ */
+ txq_length = txq_length + FST_TXQ_DEPTH;
+ }
+ spin_unlock_irqrestore(&card->card_lock, flags);
+ if (txq_length > 0) {
+ /* There is something to send
+ */
+ spin_lock_irqsave(&card->card_lock, flags);
+ skb = port->txq[port->txqs];
+ port->txqs++;
+ if (port->txqs == FST_TXQ_DEPTH)
+ port->txqs = 0;
+
+ spin_unlock_irqrestore(&card->card_lock, flags);
+ /* copy the data and set the required indicators on the
+ * card.
+ */
+ FST_WRW(card, txDescrRing[pi][port->txpos].bcnt,
+ cnv_bcnt(skb->len));
+ if (skb->len < FST_MIN_DMA_LEN ||
+ card->family == FST_FAMILY_TXP) {
+ /* Enqueue the packet with normal io */
+ memcpy_toio(card->mem +
+ BUF_OFFSET(txBuffer[pi]
+ [port->
+ txpos][0]),
+ skb->data, skb->len);
+ FST_WRB(card,
+ txDescrRing[pi][port->txpos].
+ bits,
+ DMA_OWN | TX_STP | TX_ENP);
+ dev->stats.tx_packets++;
+ dev->stats.tx_bytes += skb->len;
+ netif_trans_update(dev);
+ } else {
+ /* Or do it through dma */
+ memcpy(card->tx_dma_handle_host,
+ skb->data, skb->len);
+ card->dma_port_tx = port;
+ card->dma_len_tx = skb->len;
+ card->dma_txpos = port->txpos;
+ fst_tx_dma(card,
+ card->tx_dma_handle_card,
+ BUF_OFFSET(txBuffer[pi]
+ [port->txpos][0]),
+ skb->len);
+ }
+ if (++port->txpos >= NUM_TX_BUFFER)
+ port->txpos = 0;
+ /* If we have flow control on, can we now release it?
+ */
+ if (port->start) {
+ if (txq_length < fst_txq_low) {
+ netif_wake_queue(port_to_dev
+ (port));
+ port->start = 0;
+ }
+ }
+ dev_kfree_skb(skb);
+ } else {
+ /* Nothing to send so break out of the while loop
+ */
+ break;
+ }
+ }
+ }
+}
+
+static void
+do_bottom_half_rx(struct fst_card_info *card)
+{
+ struct fst_port_info *port;
+ int pi;
+ int rx_count = 0;
+
+ /* Check for rx completions on all ports on this card */
+ dbg(DBG_RX, "do_bottom_half_rx\n");
+ for (pi = 0, port = card->ports; pi < card->nports; pi++, port++) {
+ if (!port->run)
+ continue;
+
+ while (!(FST_RDB(card, rxDescrRing[pi][port->rxpos].bits)
+ & DMA_OWN) && !(card->dmarx_in_progress)) {
+ if (rx_count > fst_max_reads) {
+ /* Don't spend forever in receive processing
+ * Schedule another event
+ */
+ fst_q_work_item(&fst_work_intq, card->card_no);
+ tasklet_schedule(&fst_int_task);
+ break; /* Leave the loop */
+ }
+ fst_intr_rx(card, port);
+ rx_count++;
+ }
+ }
+}
+
+/* The interrupt service routine
+ * Dev_id is our fst_card_info pointer
+ */
+static irqreturn_t
+fst_intr(int dummy, void *dev_id)
+{
+ struct fst_card_info *card = dev_id;
+ struct fst_port_info *port;
+ int rdidx; /* Event buffer indices */
+ int wridx;
+ int event; /* Actual event for processing */
+ unsigned int dma_intcsr = 0;
+ unsigned int do_card_interrupt;
+ unsigned int int_retry_count;
+
+ /* Check to see if the interrupt was for this card
+ * return if not
+ * Note that the call to clear the interrupt is important
+ */
+ dbg(DBG_INTR, "intr: %d %p\n", card->irq, card);
+ if (card->state != FST_RUNNING) {
+ pr_err("Interrupt received for card %d in a non running state (%d)\n",
+ card->card_no, card->state);
+
+ /* It is possible to really be running, i.e. we have re-loaded
+ * a running card
+ * Clear and reprime the interrupt source
+ */
+ fst_clear_intr(card);
+ return IRQ_HANDLED;
+ }
+
+ /* Clear and reprime the interrupt source */
+ fst_clear_intr(card);
+
+ /* Is the interrupt for this card (handshake == 1)
+ */
+ do_card_interrupt = 0;
+ if (FST_RDB(card, interruptHandshake) == 1) {
+ do_card_interrupt += FST_CARD_INT;
+ /* Set the software acknowledge */
+ FST_WRB(card, interruptHandshake, 0xEE);
+ }
+ if (card->family == FST_FAMILY_TXU) {
+ /* Is it a DMA Interrupt
+ */
+ dma_intcsr = inl(card->pci_conf + INTCSR_9054);
+ if (dma_intcsr & 0x00200000) {
+ /* DMA Channel 0 (Rx transfer complete)
+ */
+ dbg(DBG_RX, "DMA Rx xfer complete\n");
+ outb(0x8, card->pci_conf + DMACSR0);
+ fst_rx_dma_complete(card, card->dma_port_rx,
+ card->dma_len_rx, card->dma_skb_rx,
+ card->dma_rxpos);
+ card->dmarx_in_progress = 0;
+ do_card_interrupt += FST_RX_DMA_INT;
+ }
+ if (dma_intcsr & 0x00400000) {
+ /* DMA Channel 1 (Tx transfer complete)
+ */
+ dbg(DBG_TX, "DMA Tx xfer complete\n");
+ outb(0x8, card->pci_conf + DMACSR1);
+ fst_tx_dma_complete(card, card->dma_port_tx,
+ card->dma_len_tx, card->dma_txpos);
+ card->dmatx_in_progress = 0;
+ do_card_interrupt += FST_TX_DMA_INT;
+ }
+ }
+
+ /* Have we been missing Interrupts
+ */
+ int_retry_count = FST_RDL(card, interruptRetryCount);
+ if (int_retry_count) {
+ dbg(DBG_ASS, "Card %d int_retry_count is %d\n",
+ card->card_no, int_retry_count);
+ FST_WRL(card, interruptRetryCount, 0);
+ }
+
+ if (!do_card_interrupt)
+ return IRQ_HANDLED;
+
+ /* Scehdule the bottom half of the ISR */
+ fst_q_work_item(&fst_work_intq, card->card_no);
+ tasklet_schedule(&fst_int_task);
+
+ /* Drain the event queue */
+ rdidx = FST_RDB(card, interruptEvent.rdindex) & 0x1f;
+ wridx = FST_RDB(card, interruptEvent.wrindex) & 0x1f;
+ while (rdidx != wridx) {
+ event = FST_RDB(card, interruptEvent.evntbuff[rdidx]);
+ port = &card->ports[event & 0x03];
+
+ dbg(DBG_INTR, "Processing Interrupt event: %x\n", event);
+
+ switch (event) {
+ case TE1_ALMA:
+ dbg(DBG_INTR, "TE1 Alarm intr\n");
+ if (port->run)
+ fst_intr_te1_alarm(card, port);
+ break;
+
+ case CTLA_CHG:
+ case CTLB_CHG:
+ case CTLC_CHG:
+ case CTLD_CHG:
+ if (port->run)
+ fst_intr_ctlchg(card, port);
+ break;
+
+ case ABTA_SENT:
+ case ABTB_SENT:
+ case ABTC_SENT:
+ case ABTD_SENT:
+ dbg(DBG_TX, "Abort complete port %d\n", port->index);
+ break;
+
+ case TXA_UNDF:
+ case TXB_UNDF:
+ case TXC_UNDF:
+ case TXD_UNDF:
+ /* Difficult to see how we'd get this given that we
+ * always load up the entire packet for DMA.
+ */
+ dbg(DBG_TX, "Tx underflow port %d\n", port->index);
+ port_to_dev(port)->stats.tx_errors++;
+ port_to_dev(port)->stats.tx_fifo_errors++;
+ dbg(DBG_ASS, "Tx underflow on card %d port %d\n",
+ card->card_no, port->index);
+ break;
+
+ case INIT_CPLT:
+ dbg(DBG_INIT, "Card init OK intr\n");
+ break;
+
+ case INIT_FAIL:
+ dbg(DBG_INIT, "Card init FAILED intr\n");
+ card->state = FST_IFAILED;
+ break;
+
+ default:
+ pr_err("intr: unknown card event %d. ignored\n", event);
+ break;
+ }
+
+ /* Bump and wrap the index */
+ if (++rdidx >= MAX_CIRBUFF)
+ rdidx = 0;
+ }
+ FST_WRB(card, interruptEvent.rdindex, rdidx);
+ return IRQ_HANDLED;
+}
+
+/* Check that the shared memory configuration is one that we can handle
+ * and that some basic parameters are correct
+ */
+static void
+check_started_ok(struct fst_card_info *card)
+{
+ int i;
+
+ /* Check structure version and end marker */
+ if (FST_RDW(card, smcVersion) != SMC_VERSION) {
+ pr_err("Bad shared memory version %d expected %d\n",
+ FST_RDW(card, smcVersion), SMC_VERSION);
+ card->state = FST_BADVERSION;
+ return;
+ }
+ if (FST_RDL(card, endOfSmcSignature) != END_SIG) {
+ pr_err("Missing shared memory signature\n");
+ card->state = FST_BADVERSION;
+ return;
+ }
+ /* Firmware status flag, 0x00 = initialising, 0x01 = OK, 0xFF = fail */
+ i = FST_RDB(card, taskStatus);
+ if (i == 0x01) {
+ card->state = FST_RUNNING;
+ } else if (i == 0xFF) {
+ pr_err("Firmware initialisation failed. Card halted\n");
+ card->state = FST_HALTED;
+ return;
+ } else if (i != 0x00) {
+ pr_err("Unknown firmware status 0x%x\n", i);
+ card->state = FST_HALTED;
+ return;
+ }
+
+ /* Finally check the number of ports reported by firmware against the
+ * number we assumed at card detection. Should never happen with
+ * existing firmware etc so we just report it for the moment.
+ */
+ if (FST_RDL(card, numberOfPorts) != card->nports) {
+ pr_warn("Port count mismatch on card %d. Firmware thinks %d we say %d\n",
+ card->card_no,
+ FST_RDL(card, numberOfPorts), card->nports);
+ }
+}
+
+static int
+set_conf_from_info(struct fst_card_info *card, struct fst_port_info *port,
+ struct fstioc_info *info)
+{
+ int err;
+ unsigned char my_framing;
+
+ /* Set things according to the user set valid flags
+ * Several of the old options have been invalidated/replaced by the
+ * generic hdlc package.
+ */
+ err = 0;
+ if (info->valid & FSTVAL_PROTO) {
+ if (info->proto == FST_RAW)
+ port->mode = FST_RAW;
+ else
+ port->mode = FST_GEN_HDLC;
+ }
+
+ if (info->valid & FSTVAL_CABLE)
+ err = -EINVAL;
+
+ if (info->valid & FSTVAL_SPEED)
+ err = -EINVAL;
+
+ if (info->valid & FSTVAL_PHASE)
+ FST_WRB(card, portConfig[port->index].invertClock,
+ info->invertClock);
+ if (info->valid & FSTVAL_MODE)
+ FST_WRW(card, cardMode, info->cardMode);
+ if (info->valid & FSTVAL_TE1) {
+ FST_WRL(card, suConfig.dataRate, info->lineSpeed);
+ FST_WRB(card, suConfig.clocking, info->clockSource);
+ my_framing = FRAMING_E1;
+ if (info->framing == E1)
+ my_framing = FRAMING_E1;
+ if (info->framing == T1)
+ my_framing = FRAMING_T1;
+ if (info->framing == J1)
+ my_framing = FRAMING_J1;
+ FST_WRB(card, suConfig.framing, my_framing);
+ FST_WRB(card, suConfig.structure, info->structure);
+ FST_WRB(card, suConfig.interface, info->interface);
+ FST_WRB(card, suConfig.coding, info->coding);
+ FST_WRB(card, suConfig.lineBuildOut, info->lineBuildOut);
+ FST_WRB(card, suConfig.equalizer, info->equalizer);
+ FST_WRB(card, suConfig.transparentMode, info->transparentMode);
+ FST_WRB(card, suConfig.loopMode, info->loopMode);
+ FST_WRB(card, suConfig.range, info->range);
+ FST_WRB(card, suConfig.txBufferMode, info->txBufferMode);
+ FST_WRB(card, suConfig.rxBufferMode, info->rxBufferMode);
+ FST_WRB(card, suConfig.startingSlot, info->startingSlot);
+ FST_WRB(card, suConfig.losThreshold, info->losThreshold);
+ if (info->idleCode)
+ FST_WRB(card, suConfig.enableIdleCode, 1);
+ else
+ FST_WRB(card, suConfig.enableIdleCode, 0);
+ FST_WRB(card, suConfig.idleCode, info->idleCode);
+#if FST_DEBUG
+ if (info->valid & FSTVAL_TE1) {
+ printk("Setting TE1 data\n");
+ printk("Line Speed = %d\n", info->lineSpeed);
+ printk("Start slot = %d\n", info->startingSlot);
+ printk("Clock source = %d\n", info->clockSource);
+ printk("Framing = %d\n", my_framing);
+ printk("Structure = %d\n", info->structure);
+ printk("interface = %d\n", info->interface);
+ printk("Coding = %d\n", info->coding);
+ printk("Line build out = %d\n", info->lineBuildOut);
+ printk("Equaliser = %d\n", info->equalizer);
+ printk("Transparent mode = %d\n",
+ info->transparentMode);
+ printk("Loop mode = %d\n", info->loopMode);
+ printk("Range = %d\n", info->range);
+ printk("Tx Buffer mode = %d\n", info->txBufferMode);
+ printk("Rx Buffer mode = %d\n", info->rxBufferMode);
+ printk("LOS Threshold = %d\n", info->losThreshold);
+ printk("Idle Code = %d\n", info->idleCode);
+ }
+#endif
+ }
+#if FST_DEBUG
+ if (info->valid & FSTVAL_DEBUG)
+ fst_debug_mask = info->debug;
+#endif
+
+ return err;
+}
+
+static void
+gather_conf_info(struct fst_card_info *card, struct fst_port_info *port,
+ struct fstioc_info *info)
+{
+ int i;
+
+ memset(info, 0, sizeof(struct fstioc_info));
+
+ i = port->index;
+ info->kernelVersion = LINUX_VERSION_CODE;
+ info->nports = card->nports;
+ info->type = card->type;
+ info->state = card->state;
+ info->proto = FST_GEN_HDLC;
+ info->index = i;
+#if FST_DEBUG
+ info->debug = fst_debug_mask;
+#endif
+
+ /* Only mark information as valid if card is running.
+ * Copy the data anyway in case it is useful for diagnostics
+ */
+ info->valid = ((card->state == FST_RUNNING) ? FSTVAL_ALL : FSTVAL_CARD)
+#if FST_DEBUG
+ | FSTVAL_DEBUG
+#endif
+ ;
+
+ info->lineInterface = FST_RDW(card, portConfig[i].lineInterface);
+ info->internalClock = FST_RDB(card, portConfig[i].internalClock);
+ info->lineSpeed = FST_RDL(card, portConfig[i].lineSpeed);
+ info->invertClock = FST_RDB(card, portConfig[i].invertClock);
+ info->v24IpSts = FST_RDL(card, v24IpSts[i]);
+ info->v24OpSts = FST_RDL(card, v24OpSts[i]);
+ info->clockStatus = FST_RDW(card, clockStatus[i]);
+ info->cableStatus = FST_RDW(card, cableStatus);
+ info->cardMode = FST_RDW(card, cardMode);
+ info->smcFirmwareVersion = FST_RDL(card, smcFirmwareVersion);
+
+ /* The T2U can report cable presence for both A or B
+ * in bits 0 and 1 of cableStatus. See which port we are and
+ * do the mapping.
+ */
+ if (card->family == FST_FAMILY_TXU) {
+ if (port->index == 0) {
+ /* Port A
+ */
+ info->cableStatus = info->cableStatus & 1;
+ } else {
+ /* Port B
+ */
+ info->cableStatus = info->cableStatus >> 1;
+ info->cableStatus = info->cableStatus & 1;
+ }
+ }
+ /* Some additional bits if we are TE1
+ */
+ if (card->type == FST_TYPE_TE1) {
+ info->lineSpeed = FST_RDL(card, suConfig.dataRate);
+ info->clockSource = FST_RDB(card, suConfig.clocking);
+ info->framing = FST_RDB(card, suConfig.framing);
+ info->structure = FST_RDB(card, suConfig.structure);
+ info->interface = FST_RDB(card, suConfig.interface);
+ info->coding = FST_RDB(card, suConfig.coding);
+ info->lineBuildOut = FST_RDB(card, suConfig.lineBuildOut);
+ info->equalizer = FST_RDB(card, suConfig.equalizer);
+ info->loopMode = FST_RDB(card, suConfig.loopMode);
+ info->range = FST_RDB(card, suConfig.range);
+ info->txBufferMode = FST_RDB(card, suConfig.txBufferMode);
+ info->rxBufferMode = FST_RDB(card, suConfig.rxBufferMode);
+ info->startingSlot = FST_RDB(card, suConfig.startingSlot);
+ info->losThreshold = FST_RDB(card, suConfig.losThreshold);
+ if (FST_RDB(card, suConfig.enableIdleCode))
+ info->idleCode = FST_RDB(card, suConfig.idleCode);
+ else
+ info->idleCode = 0;
+ info->receiveBufferDelay =
+ FST_RDL(card, suStatus.receiveBufferDelay);
+ info->framingErrorCount =
+ FST_RDL(card, suStatus.framingErrorCount);
+ info->codeViolationCount =
+ FST_RDL(card, suStatus.codeViolationCount);
+ info->crcErrorCount = FST_RDL(card, suStatus.crcErrorCount);
+ info->lineAttenuation = FST_RDL(card, suStatus.lineAttenuation);
+ info->lossOfSignal = FST_RDB(card, suStatus.lossOfSignal);
+ info->receiveRemoteAlarm =
+ FST_RDB(card, suStatus.receiveRemoteAlarm);
+ info->alarmIndicationSignal =
+ FST_RDB(card, suStatus.alarmIndicationSignal);
+ }
+}
+
+static int
+fst_set_iface(struct fst_card_info *card, struct fst_port_info *port,
+ struct if_settings *ifs)
+{
+ sync_serial_settings sync;
+ int i;
+
+ if (ifs->size != sizeof(sync))
+ return -ENOMEM;
+
+ if (copy_from_user(&sync, ifs->ifs_ifsu.sync, sizeof(sync)))
+ return -EFAULT;
+
+ if (sync.loopback)
+ return -EINVAL;
+
+ i = port->index;
+
+ switch (ifs->type) {
+ case IF_IFACE_V35:
+ FST_WRW(card, portConfig[i].lineInterface, V35);
+ port->hwif = V35;
+ break;
+
+ case IF_IFACE_V24:
+ FST_WRW(card, portConfig[i].lineInterface, V24);
+ port->hwif = V24;
+ break;
+
+ case IF_IFACE_X21:
+ FST_WRW(card, portConfig[i].lineInterface, X21);
+ port->hwif = X21;
+ break;
+
+ case IF_IFACE_X21D:
+ FST_WRW(card, portConfig[i].lineInterface, X21D);
+ port->hwif = X21D;
+ break;
+
+ case IF_IFACE_T1:
+ FST_WRW(card, portConfig[i].lineInterface, T1);
+ port->hwif = T1;
+ break;
+
+ case IF_IFACE_E1:
+ FST_WRW(card, portConfig[i].lineInterface, E1);
+ port->hwif = E1;
+ break;
+
+ case IF_IFACE_SYNC_SERIAL:
+ break;
+
+ default:
+ return -EINVAL;
+ }
+
+ switch (sync.clock_type) {
+ case CLOCK_EXT:
+ FST_WRB(card, portConfig[i].internalClock, EXTCLK);
+ break;
+
+ case CLOCK_INT:
+ FST_WRB(card, portConfig[i].internalClock, INTCLK);
+ break;
+
+ default:
+ return -EINVAL;
+ }
+ FST_WRL(card, portConfig[i].lineSpeed, sync.clock_rate);
+ return 0;
+}
+
+static int
+fst_get_iface(struct fst_card_info *card, struct fst_port_info *port,
+ struct if_settings *ifs)
+{
+ sync_serial_settings sync;
+ int i;
+
+ /* First check what line type is set, we'll default to reporting X.21
+ * if nothing is set as IF_IFACE_SYNC_SERIAL implies it can't be
+ * changed
+ */
+ switch (port->hwif) {
+ case E1:
+ ifs->type = IF_IFACE_E1;
+ break;
+ case T1:
+ ifs->type = IF_IFACE_T1;
+ break;
+ case V35:
+ ifs->type = IF_IFACE_V35;
+ break;
+ case V24:
+ ifs->type = IF_IFACE_V24;
+ break;
+ case X21D:
+ ifs->type = IF_IFACE_X21D;
+ break;
+ case X21:
+ default:
+ ifs->type = IF_IFACE_X21;
+ break;
+ }
+ if (!ifs->size)
+ return 0; /* only type requested */
+
+ if (ifs->size < sizeof(sync))
+ return -ENOMEM;
+
+ i = port->index;
+ memset(&sync, 0, sizeof(sync));
+ sync.clock_rate = FST_RDL(card, portConfig[i].lineSpeed);
+ /* Lucky card and linux use same encoding here */
+ sync.clock_type = FST_RDB(card, portConfig[i].internalClock) ==
+ INTCLK ? CLOCK_INT : CLOCK_EXT;
+ sync.loopback = 0;
+
+ if (copy_to_user(ifs->ifs_ifsu.sync, &sync, sizeof(sync)))
+ return -EFAULT;
+
+ ifs->size = sizeof(sync);
+ return 0;
+}
+
+static int
+fst_siocdevprivate(struct net_device *dev, struct ifreq *ifr, void __user *data, int cmd)
+{
+ struct fst_card_info *card;
+ struct fst_port_info *port;
+ struct fstioc_write wrthdr;
+ struct fstioc_info info;
+ unsigned long flags;
+ void *buf;
+
+ dbg(DBG_IOCTL, "ioctl: %x, %p\n", cmd, data);
+
+ port = dev_to_port(dev);
+ card = port->card;
+
+ if (!capable(CAP_NET_ADMIN))
+ return -EPERM;
+
+ switch (cmd) {
+ case FSTCPURESET:
+ fst_cpureset(card);
+ card->state = FST_RESET;
+ return 0;
+
+ case FSTCPURELEASE:
+ fst_cpurelease(card);
+ card->state = FST_STARTING;
+ return 0;
+
+ case FSTWRITE: /* Code write (download) */
+
+ /* First copy in the header with the length and offset of data
+ * to write
+ */
+ if (!data)
+ return -EINVAL;
+
+ if (copy_from_user(&wrthdr, data, sizeof(struct fstioc_write)))
+ return -EFAULT;
+
+ /* Sanity check the parameters. We don't support partial writes
+ * when going over the top
+ */
+ if (wrthdr.size > FST_MEMSIZE || wrthdr.offset > FST_MEMSIZE ||
+ wrthdr.size + wrthdr.offset > FST_MEMSIZE)
+ return -ENXIO;
+
+ /* Now copy the data to the card. */
+
+ buf = memdup_user(data + sizeof(struct fstioc_write),
+ wrthdr.size);
+ if (IS_ERR(buf))
+ return PTR_ERR(buf);
+
+ memcpy_toio(card->mem + wrthdr.offset, buf, wrthdr.size);
+ kfree(buf);
+
+ /* Writes to the memory of a card in the reset state constitute
+ * a download
+ */
+ if (card->state == FST_RESET)
+ card->state = FST_DOWNLOAD;
+
+ return 0;
+
+ case FSTGETCONF:
+
+ /* If card has just been started check the shared memory config
+ * version and marker
+ */
+ if (card->state == FST_STARTING) {
+ check_started_ok(card);
+
+ /* If everything checked out enable card interrupts */
+ if (card->state == FST_RUNNING) {
+ spin_lock_irqsave(&card->card_lock, flags);
+ fst_enable_intr(card);
+ FST_WRB(card, interruptHandshake, 0xEE);
+ spin_unlock_irqrestore(&card->card_lock, flags);
+ }
+ }
+
+ if (!data)
+ return -EINVAL;
+
+ gather_conf_info(card, port, &info);
+
+ if (copy_to_user(data, &info, sizeof(info)))
+ return -EFAULT;
+
+ return 0;
+
+ case FSTSETCONF:
+ /* Most of the settings have been moved to the generic ioctls
+ * this just covers debug and board ident now
+ */
+
+ if (card->state != FST_RUNNING) {
+ pr_err("Attempt to configure card %d in non-running state (%d)\n",
+ card->card_no, card->state);
+ return -EIO;
+ }
+ if (copy_from_user(&info, data, sizeof(info)))
+ return -EFAULT;
+
+ return set_conf_from_info(card, port, &info);
+ default:
+ return -EINVAL;
+ }
+}
+
+static int
+fst_ioctl(struct net_device *dev, struct if_settings *ifs)
+{
+ struct fst_card_info *card;
+ struct fst_port_info *port;
+
+ dbg(DBG_IOCTL, "SIOCDEVPRIVATE, %x\n", ifs->type);
+
+ port = dev_to_port(dev);
+ card = port->card;
+
+ if (!capable(CAP_NET_ADMIN))
+ return -EPERM;
+
+ switch (ifs->type) {
+ case IF_GET_IFACE:
+ return fst_get_iface(card, port, ifs);
+
+ case IF_IFACE_SYNC_SERIAL:
+ case IF_IFACE_V35:
+ case IF_IFACE_V24:
+ case IF_IFACE_X21:
+ case IF_IFACE_X21D:
+ case IF_IFACE_T1:
+ case IF_IFACE_E1:
+ return fst_set_iface(card, port, ifs);
+
+ case IF_PROTO_RAW:
+ port->mode = FST_RAW;
+ return 0;
+
+ case IF_GET_PROTO:
+ if (port->mode == FST_RAW) {
+ ifs->type = IF_PROTO_RAW;
+ return 0;
+ }
+ return hdlc_ioctl(dev, ifs);
+
+ default:
+ port->mode = FST_GEN_HDLC;
+ dbg(DBG_IOCTL, "Passing this type to hdlc %x\n",
+ ifs->type);
+ return hdlc_ioctl(dev, ifs);
+ }
+}
+
+static void
+fst_openport(struct fst_port_info *port)
+{
+ int signals;
+
+ /* Only init things if card is actually running. This allows open to
+ * succeed for downloads etc.
+ */
+ if (port->card->state == FST_RUNNING) {
+ if (port->run) {
+ dbg(DBG_OPEN, "open: found port already running\n");
+
+ fst_issue_cmd(port, STOPPORT);
+ port->run = 0;
+ }
+
+ fst_rx_config(port);
+ fst_tx_config(port);
+ fst_op_raise(port, OPSTS_RTS | OPSTS_DTR);
+
+ fst_issue_cmd(port, STARTPORT);
+ port->run = 1;
+
+ signals = FST_RDL(port->card, v24DebouncedSts[port->index]);
+ if (signals & ((port->hwif == X21 || port->hwif == X21D)
+ ? IPSTS_INDICATE : IPSTS_DCD))
+ netif_carrier_on(port_to_dev(port));
+ else
+ netif_carrier_off(port_to_dev(port));
+
+ port->txqe = 0;
+ port->txqs = 0;
+ }
+}
+
+static void
+fst_closeport(struct fst_port_info *port)
+{
+ if (port->card->state == FST_RUNNING) {
+ if (port->run) {
+ port->run = 0;
+ fst_op_lower(port, OPSTS_RTS | OPSTS_DTR);
+
+ fst_issue_cmd(port, STOPPORT);
+ } else {
+ dbg(DBG_OPEN, "close: port not running\n");
+ }
+ }
+}
+
+static int
+fst_open(struct net_device *dev)
+{
+ int err;
+ struct fst_port_info *port;
+
+ port = dev_to_port(dev);
+ if (!try_module_get(THIS_MODULE))
+ return -EBUSY;
+
+ if (port->mode != FST_RAW) {
+ err = hdlc_open(dev);
+ if (err) {
+ module_put(THIS_MODULE);
+ return err;
+ }
+ }
+
+ fst_openport(port);
+ netif_wake_queue(dev);
+ return 0;
+}
+
+static int
+fst_close(struct net_device *dev)
+{
+ struct fst_port_info *port;
+ struct fst_card_info *card;
+ unsigned char tx_dma_done;
+ unsigned char rx_dma_done;
+
+ port = dev_to_port(dev);
+ card = port->card;
+
+ tx_dma_done = inb(card->pci_conf + DMACSR1);
+ rx_dma_done = inb(card->pci_conf + DMACSR0);
+ dbg(DBG_OPEN,
+ "Port Close: tx_dma_in_progress = %d (%x) rx_dma_in_progress = %d (%x)\n",
+ card->dmatx_in_progress, tx_dma_done, card->dmarx_in_progress,
+ rx_dma_done);
+
+ netif_stop_queue(dev);
+ fst_closeport(dev_to_port(dev));
+ if (port->mode != FST_RAW)
+ hdlc_close(dev);
+
+ module_put(THIS_MODULE);
+ return 0;
+}
+
+static int
+fst_attach(struct net_device *dev, unsigned short encoding, unsigned short parity)
+{
+ /* Setting currently fixed in FarSync card so we check and forget
+ */
+ if (encoding != ENCODING_NRZ || parity != PARITY_CRC16_PR1_CCITT)
+ return -EINVAL;
+ return 0;
+}
+
+static void
+fst_tx_timeout(struct net_device *dev, unsigned int txqueue)
+{
+ struct fst_port_info *port;
+ struct fst_card_info *card;
+
+ port = dev_to_port(dev);
+ card = port->card;
+ dev->stats.tx_errors++;
+ dev->stats.tx_aborted_errors++;
+ dbg(DBG_ASS, "Tx timeout card %d port %d\n",
+ card->card_no, port->index);
+ fst_issue_cmd(port, ABORTTX);
+
+ netif_trans_update(dev);
+ netif_wake_queue(dev);
+ port->start = 0;
+}
+
+static netdev_tx_t
+fst_start_xmit(struct sk_buff *skb, struct net_device *dev)
+{
+ struct fst_card_info *card;
+ struct fst_port_info *port;
+ unsigned long flags;
+ int txq_length;
+
+ port = dev_to_port(dev);
+ card = port->card;
+ dbg(DBG_TX, "fst_start_xmit: length = %d\n", skb->len);
+
+ /* Drop packet with error if we don't have carrier */
+ if (!netif_carrier_ok(dev)) {
+ dev_kfree_skb(skb);
+ dev->stats.tx_errors++;
+ dev->stats.tx_carrier_errors++;
+ dbg(DBG_ASS,
+ "Tried to transmit but no carrier on card %d port %d\n",
+ card->card_no, port->index);
+ return NETDEV_TX_OK;
+ }
+
+ /* Drop it if it's too big! MTU failure ? */
+ if (skb->len > LEN_TX_BUFFER) {
+ dbg(DBG_ASS, "Packet too large %d vs %d\n", skb->len,
+ LEN_TX_BUFFER);
+ dev_kfree_skb(skb);
+ dev->stats.tx_errors++;
+ return NETDEV_TX_OK;
+ }
+
+ /* We are always going to queue the packet
+ * so that the bottom half is the only place we tx from
+ * Check there is room in the port txq
+ */
+ spin_lock_irqsave(&card->card_lock, flags);
+ txq_length = port->txqe - port->txqs;
+ if (txq_length < 0) {
+ /* This is the case where the next free has wrapped but the
+ * last used hasn't
+ */
+ txq_length = txq_length + FST_TXQ_DEPTH;
+ }
+ spin_unlock_irqrestore(&card->card_lock, flags);
+ if (txq_length > fst_txq_high) {
+ /* We have got enough buffers in the pipeline. Ask the network
+ * layer to stop sending frames down
+ */
+ netif_stop_queue(dev);
+ port->start = 1; /* I'm using this to signal stop sent up */
+ }
+
+ if (txq_length == FST_TXQ_DEPTH - 1) {
+ /* This shouldn't have happened but such is life
+ */
+ dev_kfree_skb(skb);
+ dev->stats.tx_errors++;
+ dbg(DBG_ASS, "Tx queue overflow card %d port %d\n",
+ card->card_no, port->index);
+ return NETDEV_TX_OK;
+ }
+
+ /* queue the buffer
+ */
+ spin_lock_irqsave(&card->card_lock, flags);
+ port->txq[port->txqe] = skb;
+ port->txqe++;
+ if (port->txqe == FST_TXQ_DEPTH)
+ port->txqe = 0;
+ spin_unlock_irqrestore(&card->card_lock, flags);
+
+ /* Scehdule the bottom half which now does transmit processing */
+ fst_q_work_item(&fst_work_txq, card->card_no);
+ tasklet_schedule(&fst_tx_task);
+
+ return NETDEV_TX_OK;
+}
+
+/* Card setup having checked hardware resources.
+ * Should be pretty bizarre if we get an error here (kernel memory
+ * exhaustion is one possibility). If we do see a problem we report it
+ * via a printk and leave the corresponding interface and all that follow
+ * disabled.
+ */
+static char *type_strings[] = {
+ "no hardware", /* Should never be seen */
+ "FarSync T2P",
+ "FarSync T4P",
+ "FarSync T1U",
+ "FarSync T2U",
+ "FarSync T4U",
+ "FarSync TE1"
+};
+
+static int
+fst_init_card(struct fst_card_info *card)
+{
+ int i;
+ int err;
+
+ /* We're working on a number of ports based on the card ID. If the
+ * firmware detects something different later (should never happen)
+ * we'll have to revise it in some way then.
+ */
+ for (i = 0; i < card->nports; i++) {
+ err = register_hdlc_device(card->ports[i].dev);
+ if (err < 0) {
+ pr_err("Cannot register HDLC device for port %d (errno %d)\n",
+ i, -err);
+ while (i--)
+ unregister_hdlc_device(card->ports[i].dev);
+ return err;
+ }
+ }
+
+ pr_info("%s-%s: %s IRQ%d, %d ports\n",
+ port_to_dev(&card->ports[0])->name,
+ port_to_dev(&card->ports[card->nports - 1])->name,
+ type_strings[card->type], card->irq, card->nports);
+ return 0;
+}
+
+static const struct net_device_ops fst_ops = {
+ .ndo_open = fst_open,
+ .ndo_stop = fst_close,
+ .ndo_start_xmit = hdlc_start_xmit,
+ .ndo_siocwandev = fst_ioctl,
+ .ndo_siocdevprivate = fst_siocdevprivate,
+ .ndo_tx_timeout = fst_tx_timeout,
+};
+
+/* Initialise card when detected.
+ * Returns 0 to indicate success, or errno otherwise.
+ */
+static int
+fst_add_one(struct pci_dev *pdev, const struct pci_device_id *ent)
+{
+ static int no_of_cards_added;
+ struct fst_card_info *card;
+ int err = 0;
+ int i;
+
+ printk_once(KERN_INFO
+ pr_fmt("FarSync WAN driver " FST_USER_VERSION
+ " (c) 2001-2004 FarSite Communications Ltd.\n"));
+#if FST_DEBUG
+ dbg(DBG_ASS, "The value of debug mask is %x\n", fst_debug_mask);
+#endif
+ /* We are going to be clever and allow certain cards not to be
+ * configured. An exclude list can be provided in /etc/modules.conf
+ */
+ if (fst_excluded_cards != 0) {
+ /* There are cards to exclude
+ *
+ */
+ for (i = 0; i < fst_excluded_cards; i++) {
+ if (pdev->devfn >> 3 == fst_excluded_list[i]) {
+ pr_info("FarSync PCI device %d not assigned\n",
+ (pdev->devfn) >> 3);
+ return -EBUSY;
+ }
+ }
+ }
+
+ /* Allocate driver private data */
+ card = kzalloc(sizeof(struct fst_card_info), GFP_KERNEL);
+ if (!card)
+ return -ENOMEM;
+
+ /* Try to enable the device */
+ err = pci_enable_device(pdev);
+ if (err) {
+ pr_err("Failed to enable card. Err %d\n", -err);
+ goto enable_fail;
+ }
+
+ err = pci_request_regions(pdev, "FarSync");
+ if (err) {
+ pr_err("Failed to allocate regions. Err %d\n", -err);
+ goto regions_fail;
+ }
+
+ /* Get virtual addresses of memory regions */
+ card->pci_conf = pci_resource_start(pdev, 1);
+ card->phys_mem = pci_resource_start(pdev, 2);
+ card->phys_ctlmem = pci_resource_start(pdev, 3);
+ card->mem = ioremap(card->phys_mem, FST_MEMSIZE);
+ if (!card->mem) {
+ pr_err("Physical memory remap failed\n");
+ err = -ENODEV;
+ goto ioremap_physmem_fail;
+ }
+ card->ctlmem = ioremap(card->phys_ctlmem, 0x10);
+ if (!card->ctlmem) {
+ pr_err("Control memory remap failed\n");
+ err = -ENODEV;
+ goto ioremap_ctlmem_fail;
+ }
+ dbg(DBG_PCI, "kernel mem %p, ctlmem %p\n", card->mem, card->ctlmem);
+
+ /* Register the interrupt handler */
+ if (request_irq(pdev->irq, fst_intr, IRQF_SHARED, FST_DEV_NAME, card)) {
+ pr_err("Unable to register interrupt %d\n", card->irq);
+ err = -ENODEV;
+ goto irq_fail;
+ }
+
+ /* Record info we need */
+ card->irq = pdev->irq;
+ card->type = ent->driver_data;
+ card->family = ((ent->driver_data == FST_TYPE_T2P) ||
+ (ent->driver_data == FST_TYPE_T4P))
+ ? FST_FAMILY_TXP : FST_FAMILY_TXU;
+ if (ent->driver_data == FST_TYPE_T1U ||
+ ent->driver_data == FST_TYPE_TE1)
+ card->nports = 1;
+ else
+ card->nports = ((ent->driver_data == FST_TYPE_T2P) ||
+ (ent->driver_data == FST_TYPE_T2U)) ? 2 : 4;
+
+ card->state = FST_UNINIT;
+ spin_lock_init(&card->card_lock);
+
+ for (i = 0; i < card->nports; i++) {
+ struct net_device *dev = alloc_hdlcdev(&card->ports[i]);
+ hdlc_device *hdlc;
+
+ if (!dev) {
+ while (i--)
+ free_netdev(card->ports[i].dev);
+ pr_err("FarSync: out of memory\n");
+ err = -ENOMEM;
+ goto hdlcdev_fail;
+ }
+ card->ports[i].dev = dev;
+ card->ports[i].card = card;
+ card->ports[i].index = i;
+ card->ports[i].run = 0;
+
+ hdlc = dev_to_hdlc(dev);
+
+ /* Fill in the net device info */
+ /* Since this is a PCI setup this is purely
+ * informational. Give them the buffer addresses
+ * and basic card I/O.
+ */
+ dev->mem_start = card->phys_mem
+ + BUF_OFFSET(txBuffer[i][0][0]);
+ dev->mem_end = card->phys_mem
+ + BUF_OFFSET(txBuffer[i][NUM_TX_BUFFER - 1][LEN_RX_BUFFER - 1]);
+ dev->base_addr = card->pci_conf;
+ dev->irq = card->irq;
+
+ dev->netdev_ops = &fst_ops;
+ dev->tx_queue_len = FST_TX_QUEUE_LEN;
+ dev->watchdog_timeo = FST_TX_TIMEOUT;
+ hdlc->attach = fst_attach;
+ hdlc->xmit = fst_start_xmit;
+ }
+
+ card->device = pdev;
+
+ dbg(DBG_PCI, "type %d nports %d irq %d\n", card->type,
+ card->nports, card->irq);
+ dbg(DBG_PCI, "conf %04x mem %08x ctlmem %08x\n",
+ card->pci_conf, card->phys_mem, card->phys_ctlmem);
+
+ /* Reset the card's processor */
+ fst_cpureset(card);
+ card->state = FST_RESET;
+
+ /* Initialise DMA (if required) */
+ fst_init_dma(card);
+
+ /* Record driver data for later use */
+ pci_set_drvdata(pdev, card);
+
+ /* Remainder of card setup */
+ if (no_of_cards_added >= FST_MAX_CARDS) {
+ pr_err("FarSync: too many cards\n");
+ err = -ENOMEM;
+ goto card_array_fail;
+ }
+ fst_card_array[no_of_cards_added] = card;
+ card->card_no = no_of_cards_added++; /* Record instance and bump it */
+ err = fst_init_card(card);
+ if (err)
+ goto init_card_fail;
+ if (card->family == FST_FAMILY_TXU) {
+ /* Allocate a dma buffer for transmit and receives
+ */
+ card->rx_dma_handle_host =
+ dma_alloc_coherent(&card->device->dev, FST_MAX_MTU,
+ &card->rx_dma_handle_card, GFP_KERNEL);
+ if (!card->rx_dma_handle_host) {
+ pr_err("Could not allocate rx dma buffer\n");
+ err = -ENOMEM;
+ goto rx_dma_fail;
+ }
+ card->tx_dma_handle_host =
+ dma_alloc_coherent(&card->device->dev, FST_MAX_MTU,
+ &card->tx_dma_handle_card, GFP_KERNEL);
+ if (!card->tx_dma_handle_host) {
+ pr_err("Could not allocate tx dma buffer\n");
+ err = -ENOMEM;
+ goto tx_dma_fail;
+ }
+ }
+ return 0; /* Success */
+
+tx_dma_fail:
+ dma_free_coherent(&card->device->dev, FST_MAX_MTU,
+ card->rx_dma_handle_host, card->rx_dma_handle_card);
+rx_dma_fail:
+ fst_disable_intr(card);
+ for (i = 0 ; i < card->nports ; i++)
+ unregister_hdlc_device(card->ports[i].dev);
+init_card_fail:
+ fst_card_array[card->card_no] = NULL;
+card_array_fail:
+ for (i = 0 ; i < card->nports ; i++)
+ free_netdev(card->ports[i].dev);
+hdlcdev_fail:
+ free_irq(card->irq, card);
+irq_fail:
+ iounmap(card->ctlmem);
+ioremap_ctlmem_fail:
+ iounmap(card->mem);
+ioremap_physmem_fail:
+ pci_release_regions(pdev);
+regions_fail:
+ pci_disable_device(pdev);
+enable_fail:
+ kfree(card);
+ return err;
+}
+
+/* Cleanup and close down a card
+ */
+static void
+fst_remove_one(struct pci_dev *pdev)
+{
+ struct fst_card_info *card;
+ int i;
+
+ card = pci_get_drvdata(pdev);
+
+ for (i = 0; i < card->nports; i++) {
+ struct net_device *dev = port_to_dev(&card->ports[i]);
+
+ unregister_hdlc_device(dev);
+ free_netdev(dev);
+ }
+
+ fst_disable_intr(card);
+ free_irq(card->irq, card);
+
+ iounmap(card->ctlmem);
+ iounmap(card->mem);
+ pci_release_regions(pdev);
+ if (card->family == FST_FAMILY_TXU) {
+ /* Free dma buffers
+ */
+ dma_free_coherent(&card->device->dev, FST_MAX_MTU,
+ card->rx_dma_handle_host,
+ card->rx_dma_handle_card);
+ dma_free_coherent(&card->device->dev, FST_MAX_MTU,
+ card->tx_dma_handle_host,
+ card->tx_dma_handle_card);
+ }
+ fst_card_array[card->card_no] = NULL;
+ kfree(card);
+}
+
+static struct pci_driver fst_driver = {
+ .name = FST_NAME,
+ .id_table = fst_pci_dev_id,
+ .probe = fst_add_one,
+ .remove = fst_remove_one,
+};
+
+static int __init
+fst_init(void)
+{
+ int i;
+
+ for (i = 0; i < FST_MAX_CARDS; i++)
+ fst_card_array[i] = NULL;
+ return pci_register_driver(&fst_driver);
+}
+
+static void __exit
+fst_cleanup_module(void)
+{
+ pr_info("FarSync WAN driver unloading\n");
+ pci_unregister_driver(&fst_driver);
+}
+
+module_init(fst_init);
+module_exit(fst_cleanup_module);
diff --git a/drivers/net/wan/farsync.h b/drivers/net/wan/farsync.h
new file mode 100644
index 000000000..63908dbbb
--- /dev/null
+++ b/drivers/net/wan/farsync.h
@@ -0,0 +1,347 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * FarSync X21 driver for Linux
+ *
+ * Actually sync driver for X.21, V.35 and V.24 on FarSync T-series cards
+ *
+ * Copyright (C) 2001 FarSite Communications Ltd.
+ * www.farsite.co.uk
+ *
+ * Author: R.J.Dunlop <bob.dunlop@farsite.co.uk>
+ *
+ * For the most part this file only contains structures and information
+ * that is visible to applications outside the driver. Shared memory
+ * layout etc is internal to the driver and described within farsync.c.
+ * Overlap exists in that the values used for some fields within the
+ * ioctl interface extend into the cards firmware interface so values in
+ * this file may not be changed arbitrarily.
+ */
+
+/* What's in a name
+ *
+ * The project name for this driver is Oscar. The driver is intended to be
+ * used with the FarSite T-Series cards (T2P & T4P) running in the high
+ * speed frame shifter mode. This is sometimes referred to as X.21 mode
+ * which is a complete misnomer as the card continues to support V.24 and
+ * V.35 as well as X.21.
+ *
+ * A short common prefix is useful for routines within the driver to avoid
+ * conflict with other similar drivers and I chosen to use "fst_" for this
+ * purpose (FarSite T-series).
+ *
+ * Finally the device driver needs a short network interface name. Since
+ * "hdlc" is already in use I've chosen the even less informative "sync"
+ * for the present.
+ */
+#define FST_NAME "fst" /* In debug/info etc */
+#define FST_NDEV_NAME "sync" /* For net interface */
+#define FST_DEV_NAME "farsync" /* For misc interfaces */
+
+
+/* User version number
+ *
+ * This version number is incremented with each official release of the
+ * package and is a simplified number for normal user reference.
+ * Individual files are tracked by the version control system and may
+ * have individual versions (or IDs) that move much faster than
+ * the release version as individual updates are tracked.
+ */
+#define FST_USER_VERSION "1.04"
+
+
+/* Ioctl call command values
+ */
+#define FSTWRITE (SIOCDEVPRIVATE+10)
+#define FSTCPURESET (SIOCDEVPRIVATE+11)
+#define FSTCPURELEASE (SIOCDEVPRIVATE+12)
+#define FSTGETCONF (SIOCDEVPRIVATE+13)
+#define FSTSETCONF (SIOCDEVPRIVATE+14)
+
+
+/* FSTWRITE
+ *
+ * Used to write a block of data (firmware etc) before the card is running
+ */
+struct fstioc_write {
+ unsigned int size;
+ unsigned int offset;
+ unsigned char data[];
+};
+
+
+/* FSTCPURESET and FSTCPURELEASE
+ *
+ * These take no additional data.
+ * FSTCPURESET forces the cards CPU into a reset state and holds it there.
+ * FSTCPURELEASE releases the CPU from this reset state allowing it to run,
+ * the reset vector should be setup before this ioctl is run.
+ */
+
+/* FSTGETCONF and FSTSETCONF
+ *
+ * Get and set a card/ports configuration.
+ * In order to allow selective setting of items and for the kernel to
+ * indicate a partial status response the first field "valid" is a bitmask
+ * indicating which other fields in the structure are valid.
+ * Many of the field names in this structure match those used in the
+ * firmware shared memory configuration interface and come originally from
+ * the NT header file Smc.h
+ *
+ * When used with FSTGETCONF this structure should be zeroed before use.
+ * This is to allow for possible future expansion when some of the fields
+ * might be used to indicate a different (expanded) structure.
+ */
+struct fstioc_info {
+ unsigned int valid; /* Bits of structure that are valid */
+ unsigned int nports; /* Number of serial ports */
+ unsigned int type; /* Type index of card */
+ unsigned int state; /* State of card */
+ unsigned int index; /* Index of port ioctl was issued on */
+ unsigned int smcFirmwareVersion;
+ unsigned long kernelVersion; /* What Kernel version we are working with */
+ unsigned short lineInterface; /* Physical interface type */
+ unsigned char proto; /* Line protocol */
+ unsigned char internalClock; /* 1 => internal clock, 0 => external */
+ unsigned int lineSpeed; /* Speed in bps */
+ unsigned int v24IpSts; /* V.24 control input status */
+ unsigned int v24OpSts; /* V.24 control output status */
+ unsigned short clockStatus; /* lsb: 0=> present, 1=> absent */
+ unsigned short cableStatus; /* lsb: 0=> present, 1=> absent */
+ unsigned short cardMode; /* lsb: LED id mode */
+ unsigned short debug; /* Debug flags */
+ unsigned char transparentMode; /* Not used always 0 */
+ unsigned char invertClock; /* Invert clock feature for syncing */
+ unsigned char startingSlot; /* Time slot to use for start of tx */
+ unsigned char clockSource; /* External or internal */
+ unsigned char framing; /* E1, T1 or J1 */
+ unsigned char structure; /* unframed, double, crc4, f4, f12, */
+ /* f24 f72 */
+ unsigned char interface; /* rj48c or bnc */
+ unsigned char coding; /* hdb3 b8zs */
+ unsigned char lineBuildOut; /* 0, -7.5, -15, -22 */
+ unsigned char equalizer; /* short or lon haul settings */
+ unsigned char loopMode; /* various loopbacks */
+ unsigned char range; /* cable lengths */
+ unsigned char txBufferMode; /* tx elastic buffer depth */
+ unsigned char rxBufferMode; /* rx elastic buffer depth */
+ unsigned char losThreshold; /* Attenuation on LOS signal */
+ unsigned char idleCode; /* Value to send as idle timeslot */
+ unsigned int receiveBufferDelay; /* delay thro rx buffer timeslots */
+ unsigned int framingErrorCount; /* framing errors */
+ unsigned int codeViolationCount; /* code violations */
+ unsigned int crcErrorCount; /* CRC errors */
+ int lineAttenuation; /* in dB*/
+ unsigned short lossOfSignal;
+ unsigned short receiveRemoteAlarm;
+ unsigned short alarmIndicationSignal;
+};
+
+/* "valid" bitmask */
+#define FSTVAL_NONE 0x00000000 /* Nothing valid (firmware not running).
+ * Slight misnomer. In fact nports,
+ * type, state and index will be set
+ * based on hardware detected.
+ */
+#define FSTVAL_OMODEM 0x0000001F /* First 5 bits correspond to the
+ * output status bits defined for
+ * v24OpSts
+ */
+#define FSTVAL_SPEED 0x00000020 /* internalClock, lineSpeed, clockStatus
+ */
+#define FSTVAL_CABLE 0x00000040 /* lineInterface, cableStatus */
+#define FSTVAL_IMODEM 0x00000080 /* v24IpSts */
+#define FSTVAL_CARD 0x00000100 /* nports, type, state, index,
+ * smcFirmwareVersion
+ */
+#define FSTVAL_PROTO 0x00000200 /* proto */
+#define FSTVAL_MODE 0x00000400 /* cardMode */
+#define FSTVAL_PHASE 0x00000800 /* Clock phase */
+#define FSTVAL_TE1 0x00001000 /* T1E1 Configuration */
+#define FSTVAL_DEBUG 0x80000000 /* debug */
+#define FSTVAL_ALL 0x00001FFF /* Note: does not include DEBUG flag */
+
+/* "type" */
+#define FST_TYPE_NONE 0 /* Probably should never happen */
+#define FST_TYPE_T2P 1 /* T2P X21 2 port card */
+#define FST_TYPE_T4P 2 /* T4P X21 4 port card */
+#define FST_TYPE_T1U 3 /* T1U X21 1 port card */
+#define FST_TYPE_T2U 4 /* T2U X21 2 port card */
+#define FST_TYPE_T4U 5 /* T4U X21 4 port card */
+#define FST_TYPE_TE1 6 /* T1E1 X21 1 port card */
+
+/* "family" */
+#define FST_FAMILY_TXP 0 /* T2P or T4P */
+#define FST_FAMILY_TXU 1 /* T1U or T2U or T4U */
+
+/* "state" */
+#define FST_UNINIT 0 /* Raw uninitialised state following
+ * system startup */
+#define FST_RESET 1 /* Processor held in reset state */
+#define FST_DOWNLOAD 2 /* Card being downloaded */
+#define FST_STARTING 3 /* Released following download */
+#define FST_RUNNING 4 /* Processor running */
+#define FST_BADVERSION 5 /* Bad shared memory version detected */
+#define FST_HALTED 6 /* Processor flagged a halt */
+#define FST_IFAILED 7 /* Firmware issued initialisation failed
+ * interrupt
+ */
+/* "lineInterface" */
+#define V24 1
+#define X21 2
+#define V35 3
+#define X21D 4
+#define T1 5
+#define E1 6
+#define J1 7
+
+/* "proto" */
+#define FST_RAW 4 /* Two way raw packets */
+#define FST_GEN_HDLC 5 /* Using "Generic HDLC" module */
+
+/* "internalClock" */
+#define INTCLK 1
+#define EXTCLK 0
+
+/* "v24IpSts" bitmask */
+#define IPSTS_CTS 0x00000001 /* Clear To Send (Indicate for X.21) */
+#define IPSTS_INDICATE IPSTS_CTS
+#define IPSTS_DSR 0x00000002 /* Data Set Ready (T2P Port A) */
+#define IPSTS_DCD 0x00000004 /* Data Carrier Detect */
+#define IPSTS_RI 0x00000008 /* Ring Indicator (T2P Port A) */
+#define IPSTS_TMI 0x00000010 /* Test Mode Indicator (Not Supported)*/
+
+/* "v24OpSts" bitmask */
+#define OPSTS_RTS 0x00000001 /* Request To Send (Control for X.21) */
+#define OPSTS_CONTROL OPSTS_RTS
+#define OPSTS_DTR 0x00000002 /* Data Terminal Ready */
+#define OPSTS_DSRS 0x00000004 /* Data Signalling Rate Select (Not
+ * Supported) */
+#define OPSTS_SS 0x00000008 /* Select Standby (Not Supported) */
+#define OPSTS_LL 0x00000010 /* Maintenance Test (Not Supported) */
+
+/* "cardMode" bitmask */
+#define CARD_MODE_IDENTIFY 0x0001
+
+/*
+ * Constants for T1/E1 configuration
+ */
+
+/*
+ * Clock source
+ */
+#define CLOCKING_SLAVE 0
+#define CLOCKING_MASTER 1
+
+/*
+ * Framing
+ */
+#define FRAMING_E1 0
+#define FRAMING_J1 1
+#define FRAMING_T1 2
+
+/*
+ * Structure
+ */
+#define STRUCTURE_UNFRAMED 0
+#define STRUCTURE_E1_DOUBLE 1
+#define STRUCTURE_E1_CRC4 2
+#define STRUCTURE_E1_CRC4M 3
+#define STRUCTURE_T1_4 4
+#define STRUCTURE_T1_12 5
+#define STRUCTURE_T1_24 6
+#define STRUCTURE_T1_72 7
+
+/*
+ * Interface
+ */
+#define INTERFACE_RJ48C 0
+#define INTERFACE_BNC 1
+
+/*
+ * Coding
+ */
+
+#define CODING_HDB3 0
+#define CODING_NRZ 1
+#define CODING_CMI 2
+#define CODING_CMI_HDB3 3
+#define CODING_CMI_B8ZS 4
+#define CODING_AMI 5
+#define CODING_AMI_ZCS 6
+#define CODING_B8ZS 7
+
+/*
+ * Line Build Out
+ */
+#define LBO_0dB 0
+#define LBO_7dB5 1
+#define LBO_15dB 2
+#define LBO_22dB5 3
+
+/*
+ * Range for long haul t1 > 655ft
+ */
+#define RANGE_0_133_FT 0
+#define RANGE_0_40_M RANGE_0_133_FT
+#define RANGE_133_266_FT 1
+#define RANGE_40_81_M RANGE_133_266_FT
+#define RANGE_266_399_FT 2
+#define RANGE_81_122_M RANGE_266_399_FT
+#define RANGE_399_533_FT 3
+#define RANGE_122_162_M RANGE_399_533_FT
+#define RANGE_533_655_FT 4
+#define RANGE_162_200_M RANGE_533_655_FT
+/*
+ * Receive Equaliser
+ */
+#define EQUALIZER_SHORT 0
+#define EQUALIZER_LONG 1
+
+/*
+ * Loop modes
+ */
+#define LOOP_NONE 0
+#define LOOP_LOCAL 1
+#define LOOP_PAYLOAD_EXC_TS0 2
+#define LOOP_PAYLOAD_INC_TS0 3
+#define LOOP_REMOTE 4
+
+/*
+ * Buffer modes
+ */
+#define BUFFER_2_FRAME 0
+#define BUFFER_1_FRAME 1
+#define BUFFER_96_BIT 2
+#define BUFFER_NONE 3
+
+/* Debug support
+ *
+ * These should only be enabled for development kernels, production code
+ * should define FST_DEBUG=0 in order to exclude the code.
+ * Setting FST_DEBUG=1 will include all the debug code but in a disabled
+ * state, use the FSTSETCONF ioctl to enable specific debug actions, or
+ * FST_DEBUG can be set to prime the debug selection.
+ */
+#define FST_DEBUG 0x0000
+#if FST_DEBUG
+
+extern int fst_debug_mask; /* Bit mask of actions to debug, bits
+ * listed below. Note: Bit 0 is used
+ * to trigger the inclusion of this
+ * code, without enabling any actions.
+ */
+#define DBG_INIT 0x0002 /* Card detection and initialisation */
+#define DBG_OPEN 0x0004 /* Open and close sequences */
+#define DBG_PCI 0x0008 /* PCI config operations */
+#define DBG_IOCTL 0x0010 /* Ioctls and other config */
+#define DBG_INTR 0x0020 /* Interrupt routines (be careful) */
+#define DBG_TX 0x0040 /* Packet transmission */
+#define DBG_RX 0x0080 /* Packet reception */
+#define DBG_CMD 0x0100 /* Port command issuing */
+
+#define DBG_ASS 0xFFFF /* Assert like statements. Code that
+ * should never be reached, if you see
+ * one of these then I've been an ass
+ */
+#endif /* FST_DEBUG */
+
diff --git a/drivers/net/wan/fsl_ucc_hdlc.c b/drivers/net/wan/fsl_ucc_hdlc.c
new file mode 100644
index 000000000..5fec8abe8
--- /dev/null
+++ b/drivers/net/wan/fsl_ucc_hdlc.c
@@ -0,0 +1,1310 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/* Freescale QUICC Engine HDLC Device Driver
+ *
+ * Copyright 2016 Freescale Semiconductor Inc.
+ */
+
+#include <linux/delay.h>
+#include <linux/dma-mapping.h>
+#include <linux/hdlc.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/irq.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/netdevice.h>
+#include <linux/of_address.h>
+#include <linux/of_irq.h>
+#include <linux/of_platform.h>
+#include <linux/platform_device.h>
+#include <linux/sched.h>
+#include <linux/skbuff.h>
+#include <linux/slab.h>
+#include <linux/spinlock.h>
+#include <linux/stddef.h>
+#include <soc/fsl/qe/qe_tdm.h>
+#include <uapi/linux/if_arp.h>
+
+#include "fsl_ucc_hdlc.h"
+
+#define DRV_DESC "Freescale QE UCC HDLC Driver"
+#define DRV_NAME "ucc_hdlc"
+
+#define TDM_PPPOHT_SLIC_MAXIN
+#define RX_BD_ERRORS (R_CD_S | R_OV_S | R_CR_S | R_AB_S | R_NO_S | R_LG_S)
+
+static int uhdlc_close(struct net_device *dev);
+
+static struct ucc_tdm_info utdm_primary_info = {
+ .uf_info = {
+ .tsa = 0,
+ .cdp = 0,
+ .cds = 1,
+ .ctsp = 1,
+ .ctss = 1,
+ .revd = 0,
+ .urfs = 256,
+ .utfs = 256,
+ .urfet = 128,
+ .urfset = 192,
+ .utfet = 128,
+ .utftt = 0x40,
+ .ufpt = 256,
+ .mode = UCC_FAST_PROTOCOL_MODE_HDLC,
+ .ttx_trx = UCC_FAST_GUMR_TRANSPARENT_TTX_TRX_NORMAL,
+ .tenc = UCC_FAST_TX_ENCODING_NRZ,
+ .renc = UCC_FAST_RX_ENCODING_NRZ,
+ .tcrc = UCC_FAST_16_BIT_CRC,
+ .synl = UCC_FAST_SYNC_LEN_NOT_USED,
+ },
+
+ .si_info = {
+#ifdef TDM_PPPOHT_SLIC_MAXIN
+ .simr_rfsd = 1,
+ .simr_tfsd = 2,
+#else
+ .simr_rfsd = 0,
+ .simr_tfsd = 0,
+#endif
+ .simr_crt = 0,
+ .simr_sl = 0,
+ .simr_ce = 1,
+ .simr_fe = 1,
+ .simr_gm = 0,
+ },
+};
+
+static struct ucc_tdm_info utdm_info[UCC_MAX_NUM];
+
+static int uhdlc_init(struct ucc_hdlc_private *priv)
+{
+ struct ucc_tdm_info *ut_info;
+ struct ucc_fast_info *uf_info;
+ u32 cecr_subblock;
+ u16 bd_status;
+ int ret, i;
+ void *bd_buffer;
+ dma_addr_t bd_dma_addr;
+ s32 riptr;
+ s32 tiptr;
+ u32 gumr;
+
+ ut_info = priv->ut_info;
+ uf_info = &ut_info->uf_info;
+
+ if (priv->tsa) {
+ uf_info->tsa = 1;
+ uf_info->ctsp = 1;
+ uf_info->cds = 1;
+ uf_info->ctss = 1;
+ } else {
+ uf_info->cds = 0;
+ uf_info->ctsp = 0;
+ uf_info->ctss = 0;
+ }
+
+ /* This sets HPM register in CMXUCR register which configures a
+ * open drain connected HDLC bus
+ */
+ if (priv->hdlc_bus)
+ uf_info->brkpt_support = 1;
+
+ uf_info->uccm_mask = ((UCC_HDLC_UCCE_RXB | UCC_HDLC_UCCE_RXF |
+ UCC_HDLC_UCCE_TXB) << 16);
+
+ ret = ucc_fast_init(uf_info, &priv->uccf);
+ if (ret) {
+ dev_err(priv->dev, "Failed to init uccf.");
+ return ret;
+ }
+
+ priv->uf_regs = priv->uccf->uf_regs;
+ ucc_fast_disable(priv->uccf, COMM_DIR_RX | COMM_DIR_TX);
+
+ /* Loopback mode */
+ if (priv->loopback) {
+ dev_info(priv->dev, "Loopback Mode\n");
+ /* use the same clock when work in loopback */
+ qe_setbrg(ut_info->uf_info.rx_clock, 20000000, 1);
+
+ gumr = ioread32be(&priv->uf_regs->gumr);
+ gumr |= (UCC_FAST_GUMR_LOOPBACK | UCC_FAST_GUMR_CDS |
+ UCC_FAST_GUMR_TCI);
+ gumr &= ~(UCC_FAST_GUMR_CTSP | UCC_FAST_GUMR_RSYN);
+ iowrite32be(gumr, &priv->uf_regs->gumr);
+ }
+
+ /* Initialize SI */
+ if (priv->tsa)
+ ucc_tdm_init(priv->utdm, priv->ut_info);
+
+ /* Write to QE CECR, UCCx channel to Stop Transmission */
+ cecr_subblock = ucc_fast_get_qe_cr_subblock(uf_info->ucc_num);
+ ret = qe_issue_cmd(QE_STOP_TX, cecr_subblock,
+ QE_CR_PROTOCOL_UNSPECIFIED, 0);
+
+ /* Set UPSMR normal mode (need fixed)*/
+ iowrite32be(0, &priv->uf_regs->upsmr);
+
+ /* hdlc_bus mode */
+ if (priv->hdlc_bus) {
+ u32 upsmr;
+
+ dev_info(priv->dev, "HDLC bus Mode\n");
+ upsmr = ioread32be(&priv->uf_regs->upsmr);
+
+ /* bus mode and retransmit enable, with collision window
+ * set to 8 bytes
+ */
+ upsmr |= UCC_HDLC_UPSMR_RTE | UCC_HDLC_UPSMR_BUS |
+ UCC_HDLC_UPSMR_CW8;
+ iowrite32be(upsmr, &priv->uf_regs->upsmr);
+
+ /* explicitly disable CDS & CTSP */
+ gumr = ioread32be(&priv->uf_regs->gumr);
+ gumr &= ~(UCC_FAST_GUMR_CDS | UCC_FAST_GUMR_CTSP);
+ /* set automatic sync to explicitly ignore CD signal */
+ gumr |= UCC_FAST_GUMR_SYNL_AUTO;
+ iowrite32be(gumr, &priv->uf_regs->gumr);
+ }
+
+ priv->rx_ring_size = RX_BD_RING_LEN;
+ priv->tx_ring_size = TX_BD_RING_LEN;
+ /* Alloc Rx BD */
+ priv->rx_bd_base = dma_alloc_coherent(priv->dev,
+ RX_BD_RING_LEN * sizeof(struct qe_bd),
+ &priv->dma_rx_bd, GFP_KERNEL);
+
+ if (!priv->rx_bd_base) {
+ dev_err(priv->dev, "Cannot allocate MURAM memory for RxBDs\n");
+ ret = -ENOMEM;
+ goto free_uccf;
+ }
+
+ /* Alloc Tx BD */
+ priv->tx_bd_base = dma_alloc_coherent(priv->dev,
+ TX_BD_RING_LEN * sizeof(struct qe_bd),
+ &priv->dma_tx_bd, GFP_KERNEL);
+
+ if (!priv->tx_bd_base) {
+ dev_err(priv->dev, "Cannot allocate MURAM memory for TxBDs\n");
+ ret = -ENOMEM;
+ goto free_rx_bd;
+ }
+
+ /* Alloc parameter ram for ucc hdlc */
+ priv->ucc_pram_offset = qe_muram_alloc(sizeof(struct ucc_hdlc_param),
+ ALIGNMENT_OF_UCC_HDLC_PRAM);
+
+ if (priv->ucc_pram_offset < 0) {
+ dev_err(priv->dev, "Can not allocate MURAM for hdlc parameter.\n");
+ ret = -ENOMEM;
+ goto free_tx_bd;
+ }
+
+ priv->rx_skbuff = kcalloc(priv->rx_ring_size,
+ sizeof(*priv->rx_skbuff),
+ GFP_KERNEL);
+ if (!priv->rx_skbuff) {
+ ret = -ENOMEM;
+ goto free_ucc_pram;
+ }
+
+ priv->tx_skbuff = kcalloc(priv->tx_ring_size,
+ sizeof(*priv->tx_skbuff),
+ GFP_KERNEL);
+ if (!priv->tx_skbuff) {
+ ret = -ENOMEM;
+ goto free_rx_skbuff;
+ }
+
+ priv->skb_curtx = 0;
+ priv->skb_dirtytx = 0;
+ priv->curtx_bd = priv->tx_bd_base;
+ priv->dirty_tx = priv->tx_bd_base;
+ priv->currx_bd = priv->rx_bd_base;
+ priv->currx_bdnum = 0;
+
+ /* init parameter base */
+ cecr_subblock = ucc_fast_get_qe_cr_subblock(uf_info->ucc_num);
+ ret = qe_issue_cmd(QE_ASSIGN_PAGE_TO_DEVICE, cecr_subblock,
+ QE_CR_PROTOCOL_UNSPECIFIED, priv->ucc_pram_offset);
+
+ priv->ucc_pram = (struct ucc_hdlc_param __iomem *)
+ qe_muram_addr(priv->ucc_pram_offset);
+
+ /* Zero out parameter ram */
+ memset_io(priv->ucc_pram, 0, sizeof(struct ucc_hdlc_param));
+
+ /* Alloc riptr, tiptr */
+ riptr = qe_muram_alloc(32, 32);
+ if (riptr < 0) {
+ dev_err(priv->dev, "Cannot allocate MURAM mem for Receive internal temp data pointer\n");
+ ret = -ENOMEM;
+ goto free_tx_skbuff;
+ }
+
+ tiptr = qe_muram_alloc(32, 32);
+ if (tiptr < 0) {
+ dev_err(priv->dev, "Cannot allocate MURAM mem for Transmit internal temp data pointer\n");
+ ret = -ENOMEM;
+ goto free_riptr;
+ }
+ if (riptr != (u16)riptr || tiptr != (u16)tiptr) {
+ dev_err(priv->dev, "MURAM allocation out of addressable range\n");
+ ret = -ENOMEM;
+ goto free_tiptr;
+ }
+
+ /* Set RIPTR, TIPTR */
+ iowrite16be(riptr, &priv->ucc_pram->riptr);
+ iowrite16be(tiptr, &priv->ucc_pram->tiptr);
+
+ /* Set MRBLR */
+ iowrite16be(MAX_RX_BUF_LENGTH, &priv->ucc_pram->mrblr);
+
+ /* Set RBASE, TBASE */
+ iowrite32be(priv->dma_rx_bd, &priv->ucc_pram->rbase);
+ iowrite32be(priv->dma_tx_bd, &priv->ucc_pram->tbase);
+
+ /* Set RSTATE, TSTATE */
+ iowrite32be(BMR_GBL | BMR_BIG_ENDIAN, &priv->ucc_pram->rstate);
+ iowrite32be(BMR_GBL | BMR_BIG_ENDIAN, &priv->ucc_pram->tstate);
+
+ /* Set C_MASK, C_PRES for 16bit CRC */
+ iowrite32be(CRC_16BIT_MASK, &priv->ucc_pram->c_mask);
+ iowrite32be(CRC_16BIT_PRES, &priv->ucc_pram->c_pres);
+
+ iowrite16be(MAX_FRAME_LENGTH, &priv->ucc_pram->mflr);
+ iowrite16be(DEFAULT_RFTHR, &priv->ucc_pram->rfthr);
+ iowrite16be(DEFAULT_RFTHR, &priv->ucc_pram->rfcnt);
+ iowrite16be(priv->hmask, &priv->ucc_pram->hmask);
+ iowrite16be(DEFAULT_HDLC_ADDR, &priv->ucc_pram->haddr1);
+ iowrite16be(DEFAULT_HDLC_ADDR, &priv->ucc_pram->haddr2);
+ iowrite16be(DEFAULT_HDLC_ADDR, &priv->ucc_pram->haddr3);
+ iowrite16be(DEFAULT_HDLC_ADDR, &priv->ucc_pram->haddr4);
+
+ /* Get BD buffer */
+ bd_buffer = dma_alloc_coherent(priv->dev,
+ (RX_BD_RING_LEN + TX_BD_RING_LEN) * MAX_RX_BUF_LENGTH,
+ &bd_dma_addr, GFP_KERNEL);
+
+ if (!bd_buffer) {
+ dev_err(priv->dev, "Could not allocate buffer descriptors\n");
+ ret = -ENOMEM;
+ goto free_tiptr;
+ }
+
+ priv->rx_buffer = bd_buffer;
+ priv->tx_buffer = bd_buffer + RX_BD_RING_LEN * MAX_RX_BUF_LENGTH;
+
+ priv->dma_rx_addr = bd_dma_addr;
+ priv->dma_tx_addr = bd_dma_addr + RX_BD_RING_LEN * MAX_RX_BUF_LENGTH;
+
+ for (i = 0; i < RX_BD_RING_LEN; i++) {
+ if (i < (RX_BD_RING_LEN - 1))
+ bd_status = R_E_S | R_I_S;
+ else
+ bd_status = R_E_S | R_I_S | R_W_S;
+
+ priv->rx_bd_base[i].status = cpu_to_be16(bd_status);
+ priv->rx_bd_base[i].buf = cpu_to_be32(priv->dma_rx_addr + i * MAX_RX_BUF_LENGTH);
+ }
+
+ for (i = 0; i < TX_BD_RING_LEN; i++) {
+ if (i < (TX_BD_RING_LEN - 1))
+ bd_status = T_I_S | T_TC_S;
+ else
+ bd_status = T_I_S | T_TC_S | T_W_S;
+
+ priv->tx_bd_base[i].status = cpu_to_be16(bd_status);
+ priv->tx_bd_base[i].buf = cpu_to_be32(priv->dma_tx_addr + i * MAX_RX_BUF_LENGTH);
+ }
+ dma_wmb();
+
+ return 0;
+
+free_tiptr:
+ qe_muram_free(tiptr);
+free_riptr:
+ qe_muram_free(riptr);
+free_tx_skbuff:
+ kfree(priv->tx_skbuff);
+free_rx_skbuff:
+ kfree(priv->rx_skbuff);
+free_ucc_pram:
+ qe_muram_free(priv->ucc_pram_offset);
+free_tx_bd:
+ dma_free_coherent(priv->dev,
+ TX_BD_RING_LEN * sizeof(struct qe_bd),
+ priv->tx_bd_base, priv->dma_tx_bd);
+free_rx_bd:
+ dma_free_coherent(priv->dev,
+ RX_BD_RING_LEN * sizeof(struct qe_bd),
+ priv->rx_bd_base, priv->dma_rx_bd);
+free_uccf:
+ ucc_fast_free(priv->uccf);
+
+ return ret;
+}
+
+static netdev_tx_t ucc_hdlc_tx(struct sk_buff *skb, struct net_device *dev)
+{
+ hdlc_device *hdlc = dev_to_hdlc(dev);
+ struct ucc_hdlc_private *priv = (struct ucc_hdlc_private *)hdlc->priv;
+ struct qe_bd *bd;
+ u16 bd_status;
+ unsigned long flags;
+ __be16 *proto_head;
+
+ switch (dev->type) {
+ case ARPHRD_RAWHDLC:
+ if (skb_headroom(skb) < HDLC_HEAD_LEN) {
+ dev->stats.tx_dropped++;
+ dev_kfree_skb(skb);
+ netdev_err(dev, "No enough space for hdlc head\n");
+ return -ENOMEM;
+ }
+
+ skb_push(skb, HDLC_HEAD_LEN);
+
+ proto_head = (__be16 *)skb->data;
+ *proto_head = htons(DEFAULT_HDLC_HEAD);
+
+ dev->stats.tx_bytes += skb->len;
+ break;
+
+ case ARPHRD_PPP:
+ proto_head = (__be16 *)skb->data;
+ if (*proto_head != htons(DEFAULT_PPP_HEAD)) {
+ dev->stats.tx_dropped++;
+ dev_kfree_skb(skb);
+ netdev_err(dev, "Wrong ppp header\n");
+ return -ENOMEM;
+ }
+
+ dev->stats.tx_bytes += skb->len;
+ break;
+
+ case ARPHRD_ETHER:
+ dev->stats.tx_bytes += skb->len;
+ break;
+
+ default:
+ dev->stats.tx_dropped++;
+ dev_kfree_skb(skb);
+ return -ENOMEM;
+ }
+ netdev_sent_queue(dev, skb->len);
+ spin_lock_irqsave(&priv->lock, flags);
+
+ dma_rmb();
+ /* Start from the next BD that should be filled */
+ bd = priv->curtx_bd;
+ bd_status = be16_to_cpu(bd->status);
+ /* Save the skb pointer so we can free it later */
+ priv->tx_skbuff[priv->skb_curtx] = skb;
+
+ /* Update the current skb pointer (wrapping if this was the last) */
+ priv->skb_curtx =
+ (priv->skb_curtx + 1) & TX_RING_MOD_MASK(TX_BD_RING_LEN);
+
+ /* copy skb data to tx buffer for sdma processing */
+ memcpy(priv->tx_buffer + (be32_to_cpu(bd->buf) - priv->dma_tx_addr),
+ skb->data, skb->len);
+
+ /* set bd status and length */
+ bd_status = (bd_status & T_W_S) | T_R_S | T_I_S | T_L_S | T_TC_S;
+
+ bd->length = cpu_to_be16(skb->len);
+ bd->status = cpu_to_be16(bd_status);
+
+ /* Move to next BD in the ring */
+ if (!(bd_status & T_W_S))
+ bd += 1;
+ else
+ bd = priv->tx_bd_base;
+
+ if (bd == priv->dirty_tx) {
+ if (!netif_queue_stopped(dev))
+ netif_stop_queue(dev);
+ }
+
+ priv->curtx_bd = bd;
+
+ spin_unlock_irqrestore(&priv->lock, flags);
+
+ return NETDEV_TX_OK;
+}
+
+static int hdlc_tx_restart(struct ucc_hdlc_private *priv)
+{
+ u32 cecr_subblock;
+
+ cecr_subblock =
+ ucc_fast_get_qe_cr_subblock(priv->ut_info->uf_info.ucc_num);
+
+ qe_issue_cmd(QE_RESTART_TX, cecr_subblock,
+ QE_CR_PROTOCOL_UNSPECIFIED, 0);
+ return 0;
+}
+
+static int hdlc_tx_done(struct ucc_hdlc_private *priv)
+{
+ /* Start from the next BD that should be filled */
+ struct net_device *dev = priv->ndev;
+ unsigned int bytes_sent = 0;
+ int howmany = 0;
+ struct qe_bd *bd; /* BD pointer */
+ u16 bd_status;
+ int tx_restart = 0;
+
+ dma_rmb();
+ bd = priv->dirty_tx;
+ bd_status = be16_to_cpu(bd->status);
+
+ /* Normal processing. */
+ while ((bd_status & T_R_S) == 0) {
+ struct sk_buff *skb;
+
+ if (bd_status & T_UN_S) { /* Underrun */
+ dev->stats.tx_fifo_errors++;
+ tx_restart = 1;
+ }
+ if (bd_status & T_CT_S) { /* Carrier lost */
+ dev->stats.tx_carrier_errors++;
+ tx_restart = 1;
+ }
+
+ /* BD contains already transmitted buffer. */
+ /* Handle the transmitted buffer and release */
+ /* the BD to be used with the current frame */
+
+ skb = priv->tx_skbuff[priv->skb_dirtytx];
+ if (!skb)
+ break;
+ howmany++;
+ bytes_sent += skb->len;
+ dev->stats.tx_packets++;
+ memset(priv->tx_buffer +
+ (be32_to_cpu(bd->buf) - priv->dma_tx_addr),
+ 0, skb->len);
+ dev_consume_skb_irq(skb);
+
+ priv->tx_skbuff[priv->skb_dirtytx] = NULL;
+ priv->skb_dirtytx =
+ (priv->skb_dirtytx +
+ 1) & TX_RING_MOD_MASK(TX_BD_RING_LEN);
+
+ /* We freed a buffer, so now we can restart transmission */
+ if (netif_queue_stopped(dev))
+ netif_wake_queue(dev);
+
+ /* Advance the confirmation BD pointer */
+ if (!(bd_status & T_W_S))
+ bd += 1;
+ else
+ bd = priv->tx_bd_base;
+ bd_status = be16_to_cpu(bd->status);
+ }
+ priv->dirty_tx = bd;
+
+ if (tx_restart)
+ hdlc_tx_restart(priv);
+
+ netdev_completed_queue(dev, howmany, bytes_sent);
+ return 0;
+}
+
+static int hdlc_rx_done(struct ucc_hdlc_private *priv, int rx_work_limit)
+{
+ struct net_device *dev = priv->ndev;
+ struct sk_buff *skb = NULL;
+ hdlc_device *hdlc = dev_to_hdlc(dev);
+ struct qe_bd *bd;
+ u16 bd_status;
+ u16 length, howmany = 0;
+ u8 *bdbuffer;
+
+ dma_rmb();
+ bd = priv->currx_bd;
+ bd_status = be16_to_cpu(bd->status);
+
+ /* while there are received buffers and BD is full (~R_E) */
+ while (!((bd_status & (R_E_S)) || (--rx_work_limit < 0))) {
+ if (bd_status & (RX_BD_ERRORS)) {
+ dev->stats.rx_errors++;
+
+ if (bd_status & R_CD_S)
+ dev->stats.collisions++;
+ if (bd_status & R_OV_S)
+ dev->stats.rx_fifo_errors++;
+ if (bd_status & R_CR_S)
+ dev->stats.rx_crc_errors++;
+ if (bd_status & R_AB_S)
+ dev->stats.rx_over_errors++;
+ if (bd_status & R_NO_S)
+ dev->stats.rx_frame_errors++;
+ if (bd_status & R_LG_S)
+ dev->stats.rx_length_errors++;
+
+ goto recycle;
+ }
+ bdbuffer = priv->rx_buffer +
+ (priv->currx_bdnum * MAX_RX_BUF_LENGTH);
+ length = be16_to_cpu(bd->length);
+
+ switch (dev->type) {
+ case ARPHRD_RAWHDLC:
+ bdbuffer += HDLC_HEAD_LEN;
+ length -= (HDLC_HEAD_LEN + HDLC_CRC_SIZE);
+
+ skb = dev_alloc_skb(length);
+ if (!skb) {
+ dev->stats.rx_dropped++;
+ return -ENOMEM;
+ }
+
+ skb_put(skb, length);
+ skb->len = length;
+ skb->dev = dev;
+ memcpy(skb->data, bdbuffer, length);
+ break;
+
+ case ARPHRD_PPP:
+ case ARPHRD_ETHER:
+ length -= HDLC_CRC_SIZE;
+
+ skb = dev_alloc_skb(length);
+ if (!skb) {
+ dev->stats.rx_dropped++;
+ return -ENOMEM;
+ }
+
+ skb_put(skb, length);
+ skb->len = length;
+ skb->dev = dev;
+ memcpy(skb->data, bdbuffer, length);
+ break;
+ }
+
+ dev->stats.rx_packets++;
+ dev->stats.rx_bytes += skb->len;
+ howmany++;
+ if (hdlc->proto)
+ skb->protocol = hdlc_type_trans(skb, dev);
+ netif_receive_skb(skb);
+
+recycle:
+ bd->status = cpu_to_be16((bd_status & R_W_S) | R_E_S | R_I_S);
+
+ /* update to point at the next bd */
+ if (bd_status & R_W_S) {
+ priv->currx_bdnum = 0;
+ bd = priv->rx_bd_base;
+ } else {
+ if (priv->currx_bdnum < (RX_BD_RING_LEN - 1))
+ priv->currx_bdnum += 1;
+ else
+ priv->currx_bdnum = RX_BD_RING_LEN - 1;
+
+ bd += 1;
+ }
+
+ bd_status = be16_to_cpu(bd->status);
+ }
+ dma_rmb();
+
+ priv->currx_bd = bd;
+ return howmany;
+}
+
+static int ucc_hdlc_poll(struct napi_struct *napi, int budget)
+{
+ struct ucc_hdlc_private *priv = container_of(napi,
+ struct ucc_hdlc_private,
+ napi);
+ int howmany;
+
+ /* Tx event processing */
+ spin_lock(&priv->lock);
+ hdlc_tx_done(priv);
+ spin_unlock(&priv->lock);
+
+ howmany = 0;
+ howmany += hdlc_rx_done(priv, budget - howmany);
+
+ if (howmany < budget) {
+ napi_complete_done(napi, howmany);
+ qe_setbits_be32(priv->uccf->p_uccm,
+ (UCCE_HDLC_RX_EVENTS | UCCE_HDLC_TX_EVENTS) << 16);
+ }
+
+ return howmany;
+}
+
+static irqreturn_t ucc_hdlc_irq_handler(int irq, void *dev_id)
+{
+ struct ucc_hdlc_private *priv = (struct ucc_hdlc_private *)dev_id;
+ struct net_device *dev = priv->ndev;
+ struct ucc_fast_private *uccf;
+ u32 ucce;
+ u32 uccm;
+
+ uccf = priv->uccf;
+
+ ucce = ioread32be(uccf->p_ucce);
+ uccm = ioread32be(uccf->p_uccm);
+ ucce &= uccm;
+ iowrite32be(ucce, uccf->p_ucce);
+ if (!ucce)
+ return IRQ_NONE;
+
+ if ((ucce >> 16) & (UCCE_HDLC_RX_EVENTS | UCCE_HDLC_TX_EVENTS)) {
+ if (napi_schedule_prep(&priv->napi)) {
+ uccm &= ~((UCCE_HDLC_RX_EVENTS | UCCE_HDLC_TX_EVENTS)
+ << 16);
+ iowrite32be(uccm, uccf->p_uccm);
+ __napi_schedule(&priv->napi);
+ }
+ }
+
+ /* Errors and other events */
+ if (ucce >> 16 & UCC_HDLC_UCCE_BSY)
+ dev->stats.rx_missed_errors++;
+ if (ucce >> 16 & UCC_HDLC_UCCE_TXE)
+ dev->stats.tx_errors++;
+
+ return IRQ_HANDLED;
+}
+
+static int uhdlc_ioctl(struct net_device *dev, struct if_settings *ifs)
+{
+ const size_t size = sizeof(te1_settings);
+ te1_settings line;
+ struct ucc_hdlc_private *priv = netdev_priv(dev);
+
+ switch (ifs->type) {
+ case IF_GET_IFACE:
+ ifs->type = IF_IFACE_E1;
+ if (ifs->size < size) {
+ ifs->size = size; /* data size wanted */
+ return -ENOBUFS;
+ }
+ memset(&line, 0, sizeof(line));
+ line.clock_type = priv->clocking;
+
+ if (copy_to_user(ifs->ifs_ifsu.sync, &line, size))
+ return -EFAULT;
+ return 0;
+
+ default:
+ return hdlc_ioctl(dev, ifs);
+ }
+}
+
+static int uhdlc_open(struct net_device *dev)
+{
+ u32 cecr_subblock;
+ hdlc_device *hdlc = dev_to_hdlc(dev);
+ struct ucc_hdlc_private *priv = hdlc->priv;
+ struct ucc_tdm *utdm = priv->utdm;
+ int rc = 0;
+
+ if (priv->hdlc_busy != 1) {
+ if (request_irq(priv->ut_info->uf_info.irq,
+ ucc_hdlc_irq_handler, 0, "hdlc", priv))
+ return -ENODEV;
+
+ cecr_subblock = ucc_fast_get_qe_cr_subblock(
+ priv->ut_info->uf_info.ucc_num);
+
+ qe_issue_cmd(QE_INIT_TX_RX, cecr_subblock,
+ QE_CR_PROTOCOL_UNSPECIFIED, 0);
+
+ ucc_fast_enable(priv->uccf, COMM_DIR_RX | COMM_DIR_TX);
+
+ /* Enable the TDM port */
+ if (priv->tsa)
+ qe_setbits_8(&utdm->si_regs->siglmr1_h, 0x1 << utdm->tdm_port);
+
+ priv->hdlc_busy = 1;
+ netif_device_attach(priv->ndev);
+ napi_enable(&priv->napi);
+ netdev_reset_queue(dev);
+ netif_start_queue(dev);
+
+ rc = hdlc_open(dev);
+ if (rc)
+ uhdlc_close(dev);
+ }
+
+ return rc;
+}
+
+static void uhdlc_memclean(struct ucc_hdlc_private *priv)
+{
+ qe_muram_free(ioread16be(&priv->ucc_pram->riptr));
+ qe_muram_free(ioread16be(&priv->ucc_pram->tiptr));
+
+ if (priv->rx_bd_base) {
+ dma_free_coherent(priv->dev,
+ RX_BD_RING_LEN * sizeof(struct qe_bd),
+ priv->rx_bd_base, priv->dma_rx_bd);
+
+ priv->rx_bd_base = NULL;
+ priv->dma_rx_bd = 0;
+ }
+
+ if (priv->tx_bd_base) {
+ dma_free_coherent(priv->dev,
+ TX_BD_RING_LEN * sizeof(struct qe_bd),
+ priv->tx_bd_base, priv->dma_tx_bd);
+
+ priv->tx_bd_base = NULL;
+ priv->dma_tx_bd = 0;
+ }
+
+ if (priv->ucc_pram) {
+ qe_muram_free(priv->ucc_pram_offset);
+ priv->ucc_pram = NULL;
+ priv->ucc_pram_offset = 0;
+ }
+
+ kfree(priv->rx_skbuff);
+ priv->rx_skbuff = NULL;
+
+ kfree(priv->tx_skbuff);
+ priv->tx_skbuff = NULL;
+
+ if (priv->uf_regs) {
+ iounmap(priv->uf_regs);
+ priv->uf_regs = NULL;
+ }
+
+ if (priv->uccf) {
+ ucc_fast_free(priv->uccf);
+ priv->uccf = NULL;
+ }
+
+ if (priv->rx_buffer) {
+ dma_free_coherent(priv->dev,
+ RX_BD_RING_LEN * MAX_RX_BUF_LENGTH,
+ priv->rx_buffer, priv->dma_rx_addr);
+ priv->rx_buffer = NULL;
+ priv->dma_rx_addr = 0;
+ }
+
+ if (priv->tx_buffer) {
+ dma_free_coherent(priv->dev,
+ TX_BD_RING_LEN * MAX_RX_BUF_LENGTH,
+ priv->tx_buffer, priv->dma_tx_addr);
+ priv->tx_buffer = NULL;
+ priv->dma_tx_addr = 0;
+ }
+}
+
+static int uhdlc_close(struct net_device *dev)
+{
+ struct ucc_hdlc_private *priv = dev_to_hdlc(dev)->priv;
+ struct ucc_tdm *utdm = priv->utdm;
+ u32 cecr_subblock;
+
+ napi_disable(&priv->napi);
+ cecr_subblock = ucc_fast_get_qe_cr_subblock(
+ priv->ut_info->uf_info.ucc_num);
+
+ qe_issue_cmd(QE_GRACEFUL_STOP_TX, cecr_subblock,
+ (u8)QE_CR_PROTOCOL_UNSPECIFIED, 0);
+ qe_issue_cmd(QE_CLOSE_RX_BD, cecr_subblock,
+ (u8)QE_CR_PROTOCOL_UNSPECIFIED, 0);
+
+ if (priv->tsa)
+ qe_clrbits_8(&utdm->si_regs->siglmr1_h, 0x1 << utdm->tdm_port);
+
+ ucc_fast_disable(priv->uccf, COMM_DIR_RX | COMM_DIR_TX);
+
+ free_irq(priv->ut_info->uf_info.irq, priv);
+ netif_stop_queue(dev);
+ netdev_reset_queue(dev);
+ priv->hdlc_busy = 0;
+
+ hdlc_close(dev);
+
+ return 0;
+}
+
+static int ucc_hdlc_attach(struct net_device *dev, unsigned short encoding,
+ unsigned short parity)
+{
+ struct ucc_hdlc_private *priv = dev_to_hdlc(dev)->priv;
+
+ if (encoding != ENCODING_NRZ &&
+ encoding != ENCODING_NRZI)
+ return -EINVAL;
+
+ if (parity != PARITY_NONE &&
+ parity != PARITY_CRC32_PR1_CCITT &&
+ parity != PARITY_CRC16_PR0_CCITT &&
+ parity != PARITY_CRC16_PR1_CCITT)
+ return -EINVAL;
+
+ priv->encoding = encoding;
+ priv->parity = parity;
+
+ return 0;
+}
+
+#ifdef CONFIG_PM
+static void store_clk_config(struct ucc_hdlc_private *priv)
+{
+ struct qe_mux __iomem *qe_mux_reg = &qe_immr->qmx;
+
+ /* store si clk */
+ priv->cmxsi1cr_h = ioread32be(&qe_mux_reg->cmxsi1cr_h);
+ priv->cmxsi1cr_l = ioread32be(&qe_mux_reg->cmxsi1cr_l);
+
+ /* store si sync */
+ priv->cmxsi1syr = ioread32be(&qe_mux_reg->cmxsi1syr);
+
+ /* store ucc clk */
+ memcpy_fromio(priv->cmxucr, qe_mux_reg->cmxucr, 4 * sizeof(u32));
+}
+
+static void resume_clk_config(struct ucc_hdlc_private *priv)
+{
+ struct qe_mux __iomem *qe_mux_reg = &qe_immr->qmx;
+
+ memcpy_toio(qe_mux_reg->cmxucr, priv->cmxucr, 4 * sizeof(u32));
+
+ iowrite32be(priv->cmxsi1cr_h, &qe_mux_reg->cmxsi1cr_h);
+ iowrite32be(priv->cmxsi1cr_l, &qe_mux_reg->cmxsi1cr_l);
+
+ iowrite32be(priv->cmxsi1syr, &qe_mux_reg->cmxsi1syr);
+}
+
+static int uhdlc_suspend(struct device *dev)
+{
+ struct ucc_hdlc_private *priv = dev_get_drvdata(dev);
+ struct ucc_fast __iomem *uf_regs;
+
+ if (!priv)
+ return -EINVAL;
+
+ if (!netif_running(priv->ndev))
+ return 0;
+
+ netif_device_detach(priv->ndev);
+ napi_disable(&priv->napi);
+
+ uf_regs = priv->uf_regs;
+
+ /* backup gumr guemr*/
+ priv->gumr = ioread32be(&uf_regs->gumr);
+ priv->guemr = ioread8(&uf_regs->guemr);
+
+ priv->ucc_pram_bak = kmalloc(sizeof(*priv->ucc_pram_bak),
+ GFP_KERNEL);
+ if (!priv->ucc_pram_bak)
+ return -ENOMEM;
+
+ /* backup HDLC parameter */
+ memcpy_fromio(priv->ucc_pram_bak, priv->ucc_pram,
+ sizeof(struct ucc_hdlc_param));
+
+ /* store the clk configuration */
+ store_clk_config(priv);
+
+ /* save power */
+ ucc_fast_disable(priv->uccf, COMM_DIR_RX | COMM_DIR_TX);
+
+ return 0;
+}
+
+static int uhdlc_resume(struct device *dev)
+{
+ struct ucc_hdlc_private *priv = dev_get_drvdata(dev);
+ struct ucc_tdm *utdm;
+ struct ucc_tdm_info *ut_info;
+ struct ucc_fast __iomem *uf_regs;
+ struct ucc_fast_private *uccf;
+ struct ucc_fast_info *uf_info;
+ int i;
+ u32 cecr_subblock;
+ u16 bd_status;
+
+ if (!priv)
+ return -EINVAL;
+
+ if (!netif_running(priv->ndev))
+ return 0;
+
+ utdm = priv->utdm;
+ ut_info = priv->ut_info;
+ uf_info = &ut_info->uf_info;
+ uf_regs = priv->uf_regs;
+ uccf = priv->uccf;
+
+ /* restore gumr guemr */
+ iowrite8(priv->guemr, &uf_regs->guemr);
+ iowrite32be(priv->gumr, &uf_regs->gumr);
+
+ /* Set Virtual Fifo registers */
+ iowrite16be(uf_info->urfs, &uf_regs->urfs);
+ iowrite16be(uf_info->urfet, &uf_regs->urfet);
+ iowrite16be(uf_info->urfset, &uf_regs->urfset);
+ iowrite16be(uf_info->utfs, &uf_regs->utfs);
+ iowrite16be(uf_info->utfet, &uf_regs->utfet);
+ iowrite16be(uf_info->utftt, &uf_regs->utftt);
+ /* utfb, urfb are offsets from MURAM base */
+ iowrite32be(uccf->ucc_fast_tx_virtual_fifo_base_offset, &uf_regs->utfb);
+ iowrite32be(uccf->ucc_fast_rx_virtual_fifo_base_offset, &uf_regs->urfb);
+
+ /* Rx Tx and sync clock routing */
+ resume_clk_config(priv);
+
+ iowrite32be(uf_info->uccm_mask, &uf_regs->uccm);
+ iowrite32be(0xffffffff, &uf_regs->ucce);
+
+ ucc_fast_disable(priv->uccf, COMM_DIR_RX | COMM_DIR_TX);
+
+ /* rebuild SIRAM */
+ if (priv->tsa)
+ ucc_tdm_init(priv->utdm, priv->ut_info);
+
+ /* Write to QE CECR, UCCx channel to Stop Transmission */
+ cecr_subblock = ucc_fast_get_qe_cr_subblock(uf_info->ucc_num);
+ qe_issue_cmd(QE_STOP_TX, cecr_subblock,
+ (u8)QE_CR_PROTOCOL_UNSPECIFIED, 0);
+
+ /* Set UPSMR normal mode */
+ iowrite32be(0, &uf_regs->upsmr);
+
+ /* init parameter base */
+ cecr_subblock = ucc_fast_get_qe_cr_subblock(uf_info->ucc_num);
+ qe_issue_cmd(QE_ASSIGN_PAGE_TO_DEVICE, cecr_subblock,
+ QE_CR_PROTOCOL_UNSPECIFIED, priv->ucc_pram_offset);
+
+ priv->ucc_pram = (struct ucc_hdlc_param __iomem *)
+ qe_muram_addr(priv->ucc_pram_offset);
+
+ /* restore ucc parameter */
+ memcpy_toio(priv->ucc_pram, priv->ucc_pram_bak,
+ sizeof(struct ucc_hdlc_param));
+ kfree(priv->ucc_pram_bak);
+
+ /* rebuild BD entry */
+ for (i = 0; i < RX_BD_RING_LEN; i++) {
+ if (i < (RX_BD_RING_LEN - 1))
+ bd_status = R_E_S | R_I_S;
+ else
+ bd_status = R_E_S | R_I_S | R_W_S;
+
+ priv->rx_bd_base[i].status = cpu_to_be16(bd_status);
+ priv->rx_bd_base[i].buf = cpu_to_be32(priv->dma_rx_addr + i * MAX_RX_BUF_LENGTH);
+ }
+
+ for (i = 0; i < TX_BD_RING_LEN; i++) {
+ if (i < (TX_BD_RING_LEN - 1))
+ bd_status = T_I_S | T_TC_S;
+ else
+ bd_status = T_I_S | T_TC_S | T_W_S;
+
+ priv->tx_bd_base[i].status = cpu_to_be16(bd_status);
+ priv->tx_bd_base[i].buf = cpu_to_be32(priv->dma_tx_addr + i * MAX_RX_BUF_LENGTH);
+ }
+ dma_wmb();
+
+ /* if hdlc is busy enable TX and RX */
+ if (priv->hdlc_busy == 1) {
+ cecr_subblock = ucc_fast_get_qe_cr_subblock(
+ priv->ut_info->uf_info.ucc_num);
+
+ qe_issue_cmd(QE_INIT_TX_RX, cecr_subblock,
+ (u8)QE_CR_PROTOCOL_UNSPECIFIED, 0);
+
+ ucc_fast_enable(priv->uccf, COMM_DIR_RX | COMM_DIR_TX);
+
+ /* Enable the TDM port */
+ if (priv->tsa)
+ qe_setbits_8(&utdm->si_regs->siglmr1_h, 0x1 << utdm->tdm_port);
+ }
+
+ napi_enable(&priv->napi);
+ netif_device_attach(priv->ndev);
+
+ return 0;
+}
+
+static const struct dev_pm_ops uhdlc_pm_ops = {
+ .suspend = uhdlc_suspend,
+ .resume = uhdlc_resume,
+ .freeze = uhdlc_suspend,
+ .thaw = uhdlc_resume,
+};
+
+#define HDLC_PM_OPS (&uhdlc_pm_ops)
+
+#else
+
+#define HDLC_PM_OPS NULL
+
+#endif
+static void uhdlc_tx_timeout(struct net_device *ndev, unsigned int txqueue)
+{
+ netdev_err(ndev, "%s\n", __func__);
+}
+
+static const struct net_device_ops uhdlc_ops = {
+ .ndo_open = uhdlc_open,
+ .ndo_stop = uhdlc_close,
+ .ndo_start_xmit = hdlc_start_xmit,
+ .ndo_siocwandev = uhdlc_ioctl,
+ .ndo_tx_timeout = uhdlc_tx_timeout,
+};
+
+static int hdlc_map_iomem(char *name, int init_flag, void __iomem **ptr)
+{
+ struct device_node *np;
+ struct platform_device *pdev;
+ struct resource *res;
+ static int siram_init_flag;
+ int ret = 0;
+
+ np = of_find_compatible_node(NULL, NULL, name);
+ if (!np)
+ return -EINVAL;
+
+ pdev = of_find_device_by_node(np);
+ if (!pdev) {
+ pr_err("%pOFn: failed to lookup pdev\n", np);
+ of_node_put(np);
+ return -EINVAL;
+ }
+
+ of_node_put(np);
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!res) {
+ ret = -EINVAL;
+ goto error_put_device;
+ }
+ *ptr = ioremap(res->start, resource_size(res));
+ if (!*ptr) {
+ ret = -ENOMEM;
+ goto error_put_device;
+ }
+
+ /* We've remapped the addresses, and we don't need the device any
+ * more, so we should release it.
+ */
+ put_device(&pdev->dev);
+
+ if (init_flag && siram_init_flag == 0) {
+ memset_io(*ptr, 0, resource_size(res));
+ siram_init_flag = 1;
+ }
+ return 0;
+
+error_put_device:
+ put_device(&pdev->dev);
+
+ return ret;
+}
+
+static int ucc_hdlc_probe(struct platform_device *pdev)
+{
+ struct device_node *np = pdev->dev.of_node;
+ struct ucc_hdlc_private *uhdlc_priv = NULL;
+ struct ucc_tdm_info *ut_info;
+ struct ucc_tdm *utdm = NULL;
+ struct resource res;
+ struct net_device *dev;
+ hdlc_device *hdlc;
+ int ucc_num;
+ const char *sprop;
+ int ret;
+ u32 val;
+
+ ret = of_property_read_u32_index(np, "cell-index", 0, &val);
+ if (ret) {
+ dev_err(&pdev->dev, "Invalid ucc property\n");
+ return -ENODEV;
+ }
+
+ ucc_num = val - 1;
+ if (ucc_num > (UCC_MAX_NUM - 1) || ucc_num < 0) {
+ dev_err(&pdev->dev, ": Invalid UCC num\n");
+ return -EINVAL;
+ }
+
+ memcpy(&utdm_info[ucc_num], &utdm_primary_info,
+ sizeof(utdm_primary_info));
+
+ ut_info = &utdm_info[ucc_num];
+ ut_info->uf_info.ucc_num = ucc_num;
+
+ sprop = of_get_property(np, "rx-clock-name", NULL);
+ if (sprop) {
+ ut_info->uf_info.rx_clock = qe_clock_source(sprop);
+ if ((ut_info->uf_info.rx_clock < QE_CLK_NONE) ||
+ (ut_info->uf_info.rx_clock > QE_CLK24)) {
+ dev_err(&pdev->dev, "Invalid rx-clock-name property\n");
+ return -EINVAL;
+ }
+ } else {
+ dev_err(&pdev->dev, "Invalid rx-clock-name property\n");
+ return -EINVAL;
+ }
+
+ sprop = of_get_property(np, "tx-clock-name", NULL);
+ if (sprop) {
+ ut_info->uf_info.tx_clock = qe_clock_source(sprop);
+ if ((ut_info->uf_info.tx_clock < QE_CLK_NONE) ||
+ (ut_info->uf_info.tx_clock > QE_CLK24)) {
+ dev_err(&pdev->dev, "Invalid tx-clock-name property\n");
+ return -EINVAL;
+ }
+ } else {
+ dev_err(&pdev->dev, "Invalid tx-clock-name property\n");
+ return -EINVAL;
+ }
+
+ ret = of_address_to_resource(np, 0, &res);
+ if (ret)
+ return -EINVAL;
+
+ ut_info->uf_info.regs = res.start;
+ ut_info->uf_info.irq = irq_of_parse_and_map(np, 0);
+
+ uhdlc_priv = kzalloc(sizeof(*uhdlc_priv), GFP_KERNEL);
+ if (!uhdlc_priv)
+ return -ENOMEM;
+
+ dev_set_drvdata(&pdev->dev, uhdlc_priv);
+ uhdlc_priv->dev = &pdev->dev;
+ uhdlc_priv->ut_info = ut_info;
+
+ if (of_get_property(np, "fsl,tdm-interface", NULL))
+ uhdlc_priv->tsa = 1;
+
+ if (of_get_property(np, "fsl,ucc-internal-loopback", NULL))
+ uhdlc_priv->loopback = 1;
+
+ if (of_get_property(np, "fsl,hdlc-bus", NULL))
+ uhdlc_priv->hdlc_bus = 1;
+
+ if (uhdlc_priv->tsa == 1) {
+ utdm = kzalloc(sizeof(*utdm), GFP_KERNEL);
+ if (!utdm) {
+ ret = -ENOMEM;
+ dev_err(&pdev->dev, "No mem to alloc ucc tdm data\n");
+ goto free_uhdlc_priv;
+ }
+ uhdlc_priv->utdm = utdm;
+ ret = ucc_of_parse_tdm(np, utdm, ut_info);
+ if (ret)
+ goto free_utdm;
+
+ ret = hdlc_map_iomem("fsl,t1040-qe-si", 0,
+ (void __iomem **)&utdm->si_regs);
+ if (ret)
+ goto free_utdm;
+ ret = hdlc_map_iomem("fsl,t1040-qe-siram", 1,
+ (void __iomem **)&utdm->siram);
+ if (ret)
+ goto unmap_si_regs;
+ }
+
+ if (of_property_read_u16(np, "fsl,hmask", &uhdlc_priv->hmask))
+ uhdlc_priv->hmask = DEFAULT_ADDR_MASK;
+
+ ret = uhdlc_init(uhdlc_priv);
+ if (ret) {
+ dev_err(&pdev->dev, "Failed to init uhdlc\n");
+ goto undo_uhdlc_init;
+ }
+
+ dev = alloc_hdlcdev(uhdlc_priv);
+ if (!dev) {
+ ret = -ENOMEM;
+ pr_err("ucc_hdlc: unable to allocate memory\n");
+ goto undo_uhdlc_init;
+ }
+
+ uhdlc_priv->ndev = dev;
+ hdlc = dev_to_hdlc(dev);
+ dev->tx_queue_len = 16;
+ dev->netdev_ops = &uhdlc_ops;
+ dev->watchdog_timeo = 2 * HZ;
+ hdlc->attach = ucc_hdlc_attach;
+ hdlc->xmit = ucc_hdlc_tx;
+ netif_napi_add_weight(dev, &uhdlc_priv->napi, ucc_hdlc_poll, 32);
+ if (register_hdlc_device(dev)) {
+ ret = -ENOBUFS;
+ pr_err("ucc_hdlc: unable to register hdlc device\n");
+ goto free_dev;
+ }
+
+ return 0;
+
+free_dev:
+ free_netdev(dev);
+undo_uhdlc_init:
+ if (utdm)
+ iounmap(utdm->siram);
+unmap_si_regs:
+ if (utdm)
+ iounmap(utdm->si_regs);
+free_utdm:
+ if (uhdlc_priv->tsa)
+ kfree(utdm);
+free_uhdlc_priv:
+ kfree(uhdlc_priv);
+ return ret;
+}
+
+static int ucc_hdlc_remove(struct platform_device *pdev)
+{
+ struct ucc_hdlc_private *priv = dev_get_drvdata(&pdev->dev);
+
+ uhdlc_memclean(priv);
+
+ if (priv->utdm->si_regs) {
+ iounmap(priv->utdm->si_regs);
+ priv->utdm->si_regs = NULL;
+ }
+
+ if (priv->utdm->siram) {
+ iounmap(priv->utdm->siram);
+ priv->utdm->siram = NULL;
+ }
+ kfree(priv);
+
+ dev_info(&pdev->dev, "UCC based hdlc module removed\n");
+
+ return 0;
+}
+
+static const struct of_device_id fsl_ucc_hdlc_of_match[] = {
+ {
+ .compatible = "fsl,ucc-hdlc",
+ },
+ {},
+};
+
+MODULE_DEVICE_TABLE(of, fsl_ucc_hdlc_of_match);
+
+static struct platform_driver ucc_hdlc_driver = {
+ .probe = ucc_hdlc_probe,
+ .remove = ucc_hdlc_remove,
+ .driver = {
+ .name = DRV_NAME,
+ .pm = HDLC_PM_OPS,
+ .of_match_table = fsl_ucc_hdlc_of_match,
+ },
+};
+
+module_platform_driver(ucc_hdlc_driver);
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION(DRV_DESC);
diff --git a/drivers/net/wan/fsl_ucc_hdlc.h b/drivers/net/wan/fsl_ucc_hdlc.h
new file mode 100644
index 000000000..71d5ad0a7
--- /dev/null
+++ b/drivers/net/wan/fsl_ucc_hdlc.h
@@ -0,0 +1,145 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/* Freescale QUICC Engine HDLC Device Driver
+ *
+ * Copyright 2014 Freescale Semiconductor Inc.
+ */
+
+#ifndef _UCC_HDLC_H_
+#define _UCC_HDLC_H_
+
+#include <linux/kernel.h>
+#include <linux/list.h>
+
+#include <soc/fsl/qe/immap_qe.h>
+#include <soc/fsl/qe/qe.h>
+
+#include <soc/fsl/qe/ucc.h>
+#include <soc/fsl/qe/ucc_fast.h>
+
+/* UCC HDLC event register */
+#define UCCE_HDLC_RX_EVENTS \
+(UCC_HDLC_UCCE_RXF | UCC_HDLC_UCCE_RXB | UCC_HDLC_UCCE_BSY)
+#define UCCE_HDLC_TX_EVENTS (UCC_HDLC_UCCE_TXB | UCC_HDLC_UCCE_TXE)
+
+struct ucc_hdlc_param {
+ __be16 riptr;
+ __be16 tiptr;
+ __be16 res0;
+ __be16 mrblr;
+ __be32 rstate;
+ __be32 rbase;
+ __be16 rbdstat;
+ __be16 rbdlen;
+ __be32 rdptr;
+ __be32 tstate;
+ __be32 tbase;
+ __be16 tbdstat;
+ __be16 tbdlen;
+ __be32 tdptr;
+ __be32 rbptr;
+ __be32 tbptr;
+ __be32 rcrc;
+ __be32 res1;
+ __be32 tcrc;
+ __be32 res2;
+ __be32 res3;
+ __be32 c_mask;
+ __be32 c_pres;
+ __be16 disfc;
+ __be16 crcec;
+ __be16 abtsc;
+ __be16 nmarc;
+ __be32 max_cnt;
+ __be16 mflr;
+ __be16 rfthr;
+ __be16 rfcnt;
+ __be16 hmask;
+ __be16 haddr1;
+ __be16 haddr2;
+ __be16 haddr3;
+ __be16 haddr4;
+ __be16 ts_tmp;
+ __be16 tmp_mb;
+};
+
+struct ucc_hdlc_private {
+ struct ucc_tdm *utdm;
+ struct ucc_tdm_info *ut_info;
+ struct ucc_fast_private *uccf;
+ struct device *dev;
+ struct net_device *ndev;
+ struct napi_struct napi;
+ struct ucc_fast __iomem *uf_regs; /* UCC Fast registers */
+ struct ucc_hdlc_param __iomem *ucc_pram;
+ u16 tsa;
+ bool hdlc_busy;
+ bool loopback;
+ bool hdlc_bus;
+
+ u8 *tx_buffer;
+ u8 *rx_buffer;
+ dma_addr_t dma_tx_addr;
+ dma_addr_t dma_rx_addr;
+
+ struct qe_bd *tx_bd_base;
+ struct qe_bd *rx_bd_base;
+ dma_addr_t dma_tx_bd;
+ dma_addr_t dma_rx_bd;
+ struct qe_bd *curtx_bd;
+ struct qe_bd *currx_bd;
+ struct qe_bd *dirty_tx;
+ u16 currx_bdnum;
+
+ struct sk_buff **tx_skbuff;
+ struct sk_buff **rx_skbuff;
+ u16 skb_curtx;
+ u16 skb_currx;
+ unsigned short skb_dirtytx;
+
+ unsigned short tx_ring_size;
+ unsigned short rx_ring_size;
+ s32 ucc_pram_offset;
+
+ unsigned short encoding;
+ unsigned short parity;
+ unsigned short hmask;
+ u32 clocking;
+ spinlock_t lock; /* lock for Tx BD and Tx buffer */
+#ifdef CONFIG_PM
+ struct ucc_hdlc_param *ucc_pram_bak;
+ u32 gumr;
+ u8 guemr;
+ u32 cmxsi1cr_l, cmxsi1cr_h;
+ u32 cmxsi1syr;
+ u32 cmxucr[4];
+#endif
+};
+
+#define TX_BD_RING_LEN 0x10
+#define RX_BD_RING_LEN 0x20
+#define RX_CLEAN_MAX 0x10
+#define NUM_OF_BUF 4
+#define MAX_RX_BUF_LENGTH (48 * 0x20)
+#define MAX_FRAME_LENGTH (MAX_RX_BUF_LENGTH + 8)
+#define ALIGNMENT_OF_UCC_HDLC_PRAM 64
+#define SI_BANK_SIZE 128
+#define MAX_HDLC_NUM 4
+#define HDLC_HEAD_LEN 2
+#define HDLC_CRC_SIZE 2
+#define TX_RING_MOD_MASK(size) (size - 1)
+#define RX_RING_MOD_MASK(size) (size - 1)
+
+#define HDLC_HEAD_MASK 0x0000
+#define DEFAULT_HDLC_HEAD 0xff44
+#define DEFAULT_ADDR_MASK 0x00ff
+#define DEFAULT_HDLC_ADDR 0x00ff
+
+#define BMR_GBL 0x20000000
+#define BMR_BIG_ENDIAN 0x10000000
+#define CRC_16BIT_MASK 0x0000F0B8
+#define CRC_16BIT_PRES 0x0000FFFF
+#define DEFAULT_RFTHR 1
+
+#define DEFAULT_PPP_HEAD 0xff03
+
+#endif
diff --git a/drivers/net/wan/hd64570.c b/drivers/net/wan/hd64570.c
new file mode 100644
index 000000000..0d19e39fe
--- /dev/null
+++ b/drivers/net/wan/hd64570.c
@@ -0,0 +1,724 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Hitachi SCA HD64570 driver for Linux
+ *
+ * Copyright (C) 1998-2003 Krzysztof Halasa <khc@pm.waw.pl>
+ *
+ * Source of information: Hitachi HD64570 SCA User's Manual
+ *
+ * We use the following SCA memory map:
+ *
+ * Packet buffer descriptor rings - starting from winbase or win0base:
+ * rx_ring_buffers * sizeof(pkt_desc) = logical channel #0 RX ring
+ * tx_ring_buffers * sizeof(pkt_desc) = logical channel #0 TX ring
+ * rx_ring_buffers * sizeof(pkt_desc) = logical channel #1 RX ring (if used)
+ * tx_ring_buffers * sizeof(pkt_desc) = logical channel #1 TX ring (if used)
+ *
+ * Packet data buffers - starting from winbase + buff_offset:
+ * rx_ring_buffers * HDLC_MAX_MRU = logical channel #0 RX buffers
+ * tx_ring_buffers * HDLC_MAX_MRU = logical channel #0 TX buffers
+ * rx_ring_buffers * HDLC_MAX_MRU = logical channel #0 RX buffers (if used)
+ * tx_ring_buffers * HDLC_MAX_MRU = logical channel #0 TX buffers (if used)
+ */
+
+#include <linux/bitops.h>
+#include <linux/errno.h>
+#include <linux/fcntl.h>
+#include <linux/hdlc.h>
+#include <linux/in.h>
+#include <linux/interrupt.h>
+#include <linux/ioport.h>
+#include <linux/jiffies.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/netdevice.h>
+#include <linux/skbuff.h>
+#include <linux/string.h>
+#include <linux/types.h>
+#include <asm/io.h>
+#include <linux/uaccess.h>
+#include "hd64570.h"
+
+#define get_msci(port) (phy_node(port) ? MSCI1_OFFSET : MSCI0_OFFSET)
+#define get_dmac_rx(port) (phy_node(port) ? DMAC1RX_OFFSET : DMAC0RX_OFFSET)
+#define get_dmac_tx(port) (phy_node(port) ? DMAC1TX_OFFSET : DMAC0TX_OFFSET)
+
+#define SCA_INTR_MSCI(node) (node ? 0x10 : 0x01)
+#define SCA_INTR_DMAC_RX(node) (node ? 0x20 : 0x02)
+#define SCA_INTR_DMAC_TX(node) (node ? 0x40 : 0x04)
+
+static inline struct net_device *port_to_dev(port_t *port)
+{
+ return port->dev;
+}
+
+static inline int sca_intr_status(card_t *card)
+{
+ u8 result = 0;
+ u8 isr0 = sca_in(ISR0, card);
+ u8 isr1 = sca_in(ISR1, card);
+
+ if (isr1 & 0x03)
+ result |= SCA_INTR_DMAC_RX(0);
+ if (isr1 & 0x0C)
+ result |= SCA_INTR_DMAC_TX(0);
+ if (isr1 & 0x30)
+ result |= SCA_INTR_DMAC_RX(1);
+ if (isr1 & 0xC0)
+ result |= SCA_INTR_DMAC_TX(1);
+ if (isr0 & 0x0F)
+ result |= SCA_INTR_MSCI(0);
+ if (isr0 & 0xF0)
+ result |= SCA_INTR_MSCI(1);
+
+ if (!(result & SCA_INTR_DMAC_TX(0)))
+ if (sca_in(DSR_TX(0), card) & DSR_EOM)
+ result |= SCA_INTR_DMAC_TX(0);
+ if (!(result & SCA_INTR_DMAC_TX(1)))
+ if (sca_in(DSR_TX(1), card) & DSR_EOM)
+ result |= SCA_INTR_DMAC_TX(1);
+
+ return result;
+}
+
+static inline port_t *dev_to_port(struct net_device *dev)
+{
+ return dev_to_hdlc(dev)->priv;
+}
+
+static inline u16 next_desc(port_t *port, u16 desc, int transmit)
+{
+ return (desc + 1) % (transmit ? port_to_card(port)->tx_ring_buffers
+ : port_to_card(port)->rx_ring_buffers);
+}
+
+static inline u16 desc_abs_number(port_t *port, u16 desc, int transmit)
+{
+ u16 rx_buffs = port_to_card(port)->rx_ring_buffers;
+ u16 tx_buffs = port_to_card(port)->tx_ring_buffers;
+
+ desc %= (transmit ? tx_buffs : rx_buffs); // called with "X + 1" etc.
+ return log_node(port) * (rx_buffs + tx_buffs) +
+ transmit * rx_buffs + desc;
+}
+
+static inline u16 desc_offset(port_t *port, u16 desc, int transmit)
+{
+ /* Descriptor offset always fits in 16 bits */
+ return desc_abs_number(port, desc, transmit) * sizeof(pkt_desc);
+}
+
+static inline pkt_desc __iomem *desc_address(port_t *port, u16 desc,
+ int transmit)
+{
+#ifdef PAGE0_ALWAYS_MAPPED
+ return (pkt_desc __iomem *)(win0base(port_to_card(port))
+ + desc_offset(port, desc, transmit));
+#else
+ return (pkt_desc __iomem *)(winbase(port_to_card(port))
+ + desc_offset(port, desc, transmit));
+#endif
+}
+
+static inline u32 buffer_offset(port_t *port, u16 desc, int transmit)
+{
+ return port_to_card(port)->buff_offset +
+ desc_abs_number(port, desc, transmit) * (u32)HDLC_MAX_MRU;
+}
+
+static inline void sca_set_carrier(port_t *port)
+{
+ if (!(sca_in(get_msci(port) + ST3, port_to_card(port)) & ST3_DCD)) {
+#ifdef DEBUG_LINK
+ printk(KERN_DEBUG "%s: sca_set_carrier on\n",
+ port_to_dev(port)->name);
+#endif
+ netif_carrier_on(port_to_dev(port));
+ } else {
+#ifdef DEBUG_LINK
+ printk(KERN_DEBUG "%s: sca_set_carrier off\n",
+ port_to_dev(port)->name);
+#endif
+ netif_carrier_off(port_to_dev(port));
+ }
+}
+
+static void sca_init_port(port_t *port)
+{
+ card_t *card = port_to_card(port);
+ int transmit, i;
+
+ port->rxin = 0;
+ port->txin = 0;
+ port->txlast = 0;
+
+#ifndef PAGE0_ALWAYS_MAPPED
+ openwin(card, 0);
+#endif
+
+ for (transmit = 0; transmit < 2; transmit++) {
+ u16 dmac = transmit ? get_dmac_tx(port) : get_dmac_rx(port);
+ u16 buffs = transmit ? card->tx_ring_buffers
+ : card->rx_ring_buffers;
+
+ for (i = 0; i < buffs; i++) {
+ pkt_desc __iomem *desc = desc_address(port, i, transmit);
+ u16 chain_off = desc_offset(port, i + 1, transmit);
+ u32 buff_off = buffer_offset(port, i, transmit);
+
+ writew(chain_off, &desc->cp);
+ writel(buff_off, &desc->bp);
+ writew(0, &desc->len);
+ writeb(0, &desc->stat);
+ }
+
+ /* DMA disable - to halt state */
+ sca_out(0, transmit ? DSR_TX(phy_node(port)) :
+ DSR_RX(phy_node(port)), card);
+ /* software ABORT - to initial state */
+ sca_out(DCR_ABORT, transmit ? DCR_TX(phy_node(port)) :
+ DCR_RX(phy_node(port)), card);
+
+ /* current desc addr */
+ sca_out(0, dmac + CPB, card); /* pointer base */
+ sca_outw(desc_offset(port, 0, transmit), dmac + CDAL, card);
+ if (!transmit)
+ sca_outw(desc_offset(port, buffs - 1, transmit),
+ dmac + EDAL, card);
+ else
+ sca_outw(desc_offset(port, 0, transmit), dmac + EDAL,
+ card);
+
+ /* clear frame end interrupt counter */
+ sca_out(DCR_CLEAR_EOF, transmit ? DCR_TX(phy_node(port)) :
+ DCR_RX(phy_node(port)), card);
+
+ if (!transmit) { /* Receive */
+ /* set buffer length */
+ sca_outw(HDLC_MAX_MRU, dmac + BFLL, card);
+ /* Chain mode, Multi-frame */
+ sca_out(0x14, DMR_RX(phy_node(port)), card);
+ sca_out(DIR_EOME | DIR_BOFE, DIR_RX(phy_node(port)),
+ card);
+ /* DMA enable */
+ sca_out(DSR_DE, DSR_RX(phy_node(port)), card);
+ } else { /* Transmit */
+ /* Chain mode, Multi-frame */
+ sca_out(0x14, DMR_TX(phy_node(port)), card);
+ /* enable underflow interrupts */
+ sca_out(DIR_BOFE, DIR_TX(phy_node(port)), card);
+ }
+ }
+ sca_set_carrier(port);
+}
+
+#ifdef NEED_SCA_MSCI_INTR
+/* MSCI interrupt service */
+static inline void sca_msci_intr(port_t *port)
+{
+ u16 msci = get_msci(port);
+ card_t *card = port_to_card(port);
+ u8 stat = sca_in(msci + ST1, card); /* read MSCI ST1 status */
+
+ /* Reset MSCI TX underrun and CDCD status bit */
+ sca_out(stat & (ST1_UDRN | ST1_CDCD), msci + ST1, card);
+
+ if (stat & ST1_UDRN) {
+ /* TX Underrun error detected */
+ port_to_dev(port)->stats.tx_errors++;
+ port_to_dev(port)->stats.tx_fifo_errors++;
+ }
+
+ if (stat & ST1_CDCD)
+ sca_set_carrier(port);
+}
+#endif
+
+static inline void sca_rx(card_t *card, port_t *port, pkt_desc __iomem *desc,
+ u16 rxin)
+{
+ struct net_device *dev = port_to_dev(port);
+ struct sk_buff *skb;
+ u16 len;
+ u32 buff;
+ u32 maxlen;
+ u8 page;
+
+ len = readw(&desc->len);
+ skb = dev_alloc_skb(len);
+ if (!skb) {
+ dev->stats.rx_dropped++;
+ return;
+ }
+
+ buff = buffer_offset(port, rxin, 0);
+ page = buff / winsize(card);
+ buff = buff % winsize(card);
+ maxlen = winsize(card) - buff;
+
+ openwin(card, page);
+
+ if (len > maxlen) {
+ memcpy_fromio(skb->data, winbase(card) + buff, maxlen);
+ openwin(card, page + 1);
+ memcpy_fromio(skb->data + maxlen, winbase(card), len - maxlen);
+ } else {
+ memcpy_fromio(skb->data, winbase(card) + buff, len);
+ }
+
+#ifndef PAGE0_ALWAYS_MAPPED
+ openwin(card, 0); /* select pkt_desc table page back */
+#endif
+ skb_put(skb, len);
+#ifdef DEBUG_PKT
+ printk(KERN_DEBUG "%s RX(%i):", dev->name, skb->len);
+ debug_frame(skb);
+#endif
+ dev->stats.rx_packets++;
+ dev->stats.rx_bytes += skb->len;
+ skb->protocol = hdlc_type_trans(skb, dev);
+ netif_rx(skb);
+}
+
+/* Receive DMA interrupt service */
+static inline void sca_rx_intr(port_t *port)
+{
+ struct net_device *dev = port_to_dev(port);
+ u16 dmac = get_dmac_rx(port);
+ card_t *card = port_to_card(port);
+ u8 stat = sca_in(DSR_RX(phy_node(port)), card); /* read DMA Status */
+
+ /* Reset DSR status bits */
+ sca_out((stat & (DSR_EOT | DSR_EOM | DSR_BOF | DSR_COF)) | DSR_DWE,
+ DSR_RX(phy_node(port)), card);
+
+ if (stat & DSR_BOF)
+ /* Dropped one or more frames */
+ dev->stats.rx_over_errors++;
+
+ while (1) {
+ u32 desc_off = desc_offset(port, port->rxin, 0);
+ pkt_desc __iomem *desc;
+ u32 cda = sca_inw(dmac + CDAL, card);
+
+ if (cda >= desc_off && (cda < desc_off + sizeof(pkt_desc)))
+ break; /* No frame received */
+
+ desc = desc_address(port, port->rxin, 0);
+ stat = readb(&desc->stat);
+ if (!(stat & ST_RX_EOM))
+ port->rxpart = 1; /* partial frame received */
+ else if ((stat & ST_ERROR_MASK) || port->rxpart) {
+ dev->stats.rx_errors++;
+ if (stat & ST_RX_OVERRUN)
+ dev->stats.rx_fifo_errors++;
+ else if ((stat & (ST_RX_SHORT | ST_RX_ABORT |
+ ST_RX_RESBIT)) || port->rxpart)
+ dev->stats.rx_frame_errors++;
+ else if (stat & ST_RX_CRC)
+ dev->stats.rx_crc_errors++;
+ if (stat & ST_RX_EOM)
+ port->rxpart = 0; /* received last fragment */
+ } else {
+ sca_rx(card, port, desc, port->rxin);
+ }
+
+ /* Set new error descriptor address */
+ sca_outw(desc_off, dmac + EDAL, card);
+ port->rxin = next_desc(port, port->rxin, 0);
+ }
+
+ /* make sure RX DMA is enabled */
+ sca_out(DSR_DE, DSR_RX(phy_node(port)), card);
+}
+
+/* Transmit DMA interrupt service */
+static inline void sca_tx_intr(port_t *port)
+{
+ struct net_device *dev = port_to_dev(port);
+ u16 dmac = get_dmac_tx(port);
+ card_t *card = port_to_card(port);
+ u8 stat;
+
+ spin_lock(&port->lock);
+
+ stat = sca_in(DSR_TX(phy_node(port)), card); /* read DMA Status */
+
+ /* Reset DSR status bits */
+ sca_out((stat & (DSR_EOT | DSR_EOM | DSR_BOF | DSR_COF)) | DSR_DWE,
+ DSR_TX(phy_node(port)), card);
+
+ while (1) {
+ pkt_desc __iomem *desc;
+
+ u32 desc_off = desc_offset(port, port->txlast, 1);
+ u32 cda = sca_inw(dmac + CDAL, card);
+
+ if (cda >= desc_off && (cda < desc_off + sizeof(pkt_desc)))
+ break; /* Transmitter is/will_be sending this frame */
+
+ desc = desc_address(port, port->txlast, 1);
+ dev->stats.tx_packets++;
+ dev->stats.tx_bytes += readw(&desc->len);
+ writeb(0, &desc->stat); /* Free descriptor */
+ port->txlast = next_desc(port, port->txlast, 1);
+ }
+
+ netif_wake_queue(dev);
+ spin_unlock(&port->lock);
+}
+
+static irqreturn_t sca_intr(int irq, void *dev_id)
+{
+ card_t *card = dev_id;
+ int i;
+ u8 stat;
+ int handled = 0;
+ u8 page = sca_get_page(card);
+
+ while ((stat = sca_intr_status(card)) != 0) {
+ handled = 1;
+ for (i = 0; i < 2; i++) {
+ port_t *port = get_port(card, i);
+
+ if (port) {
+ if (stat & SCA_INTR_MSCI(i))
+ sca_msci_intr(port);
+
+ if (stat & SCA_INTR_DMAC_RX(i))
+ sca_rx_intr(port);
+
+ if (stat & SCA_INTR_DMAC_TX(i))
+ sca_tx_intr(port);
+ }
+ }
+ }
+
+ openwin(card, page); /* Restore original page */
+ return IRQ_RETVAL(handled);
+}
+
+static void sca_set_port(port_t *port)
+{
+ card_t *card = port_to_card(port);
+ u16 msci = get_msci(port);
+ u8 md2 = sca_in(msci + MD2, card);
+ unsigned int tmc, br = 10, brv = 1024;
+
+ if (port->settings.clock_rate > 0) {
+ /* Try lower br for better accuracy*/
+ do {
+ br--;
+ brv >>= 1; /* brv = 2^9 = 512 max in specs */
+
+ /* Baud Rate = CLOCK_BASE / TMC / 2^BR */
+ tmc = CLOCK_BASE / brv / port->settings.clock_rate;
+ } while (br > 1 && tmc <= 128);
+
+ if (tmc < 1) {
+ tmc = 1;
+ br = 0; /* For baud=CLOCK_BASE we use tmc=1 br=0 */
+ brv = 1;
+ } else if (tmc > 255) {
+ tmc = 256; /* tmc=0 means 256 - low baud rates */
+ }
+
+ port->settings.clock_rate = CLOCK_BASE / brv / tmc;
+ } else {
+ br = 9; /* Minimum clock rate */
+ tmc = 256; /* 8bit = 0 */
+ port->settings.clock_rate = CLOCK_BASE / (256 * 512);
+ }
+
+ port->rxs = (port->rxs & ~CLK_BRG_MASK) | br;
+ port->txs = (port->txs & ~CLK_BRG_MASK) | br;
+ port->tmc = tmc;
+
+ /* baud divisor - time constant*/
+ sca_out(port->tmc, msci + TMC, card);
+
+ /* Set BRG bits */
+ sca_out(port->rxs, msci + RXS, card);
+ sca_out(port->txs, msci + TXS, card);
+
+ if (port->settings.loopback)
+ md2 |= MD2_LOOPBACK;
+ else
+ md2 &= ~MD2_LOOPBACK;
+
+ sca_out(md2, msci + MD2, card);
+}
+
+static void sca_open(struct net_device *dev)
+{
+ port_t *port = dev_to_port(dev);
+ card_t *card = port_to_card(port);
+ u16 msci = get_msci(port);
+ u8 md0, md2;
+
+ switch (port->encoding) {
+ case ENCODING_NRZ:
+ md2 = MD2_NRZ;
+ break;
+ case ENCODING_NRZI:
+ md2 = MD2_NRZI;
+ break;
+ case ENCODING_FM_MARK:
+ md2 = MD2_FM_MARK;
+ break;
+ case ENCODING_FM_SPACE:
+ md2 = MD2_FM_SPACE;
+ break;
+ default:
+ md2 = MD2_MANCHESTER;
+ }
+
+ if (port->settings.loopback)
+ md2 |= MD2_LOOPBACK;
+
+ switch (port->parity) {
+ case PARITY_CRC16_PR0:
+ md0 = MD0_HDLC | MD0_CRC_16_0;
+ break;
+ case PARITY_CRC16_PR1:
+ md0 = MD0_HDLC | MD0_CRC_16;
+ break;
+ case PARITY_CRC16_PR0_CCITT:
+ md0 = MD0_HDLC | MD0_CRC_ITU_0;
+ break;
+ case PARITY_CRC16_PR1_CCITT:
+ md0 = MD0_HDLC | MD0_CRC_ITU;
+ break;
+ default:
+ md0 = MD0_HDLC | MD0_CRC_NONE;
+ }
+
+ sca_out(CMD_RESET, msci + CMD, card);
+ sca_out(md0, msci + MD0, card);
+ sca_out(0x00, msci + MD1, card); /* no address field check */
+ sca_out(md2, msci + MD2, card);
+ sca_out(0x7E, msci + IDL, card); /* flag character 0x7E */
+ sca_out(CTL_IDLE, msci + CTL, card);
+
+ /* Allow at least 8 bytes before requesting RX DMA operation */
+ /* TX with higher priority and possibly with shorter transfers */
+ sca_out(0x07, msci + RRC, card); /* +1=RXRDY/DMA activation condition*/
+ sca_out(0x10, msci + TRC0, card); /* = TXRDY/DMA activation condition*/
+ sca_out(0x14, msci + TRC1, card); /* +1=TXRDY/DMA deactiv condition */
+
+/* We're using the following interrupts:
+ * - TXINT (DMAC completed all transmisions, underrun or DCD change)
+ * - all DMA interrupts
+ */
+ sca_set_carrier(port);
+
+ /* MSCI TX INT and RX INT A IRQ enable */
+ sca_out(IE0_TXINT | IE0_RXINTA, msci + IE0, card);
+ sca_out(IE1_UDRN | IE1_CDCD, msci + IE1, card);
+ sca_out(sca_in(IER0, card) | (phy_node(port) ? 0xC0 : 0x0C),
+ IER0, card); /* TXINT and RXINT */
+ /* enable DMA IRQ */
+ sca_out(sca_in(IER1, card) | (phy_node(port) ? 0xF0 : 0x0F),
+ IER1, card);
+
+ sca_out(port->tmc, msci + TMC, card); /* Restore registers */
+ sca_out(port->rxs, msci + RXS, card);
+ sca_out(port->txs, msci + TXS, card);
+ sca_out(CMD_TX_ENABLE, msci + CMD, card);
+ sca_out(CMD_RX_ENABLE, msci + CMD, card);
+
+ netif_start_queue(dev);
+}
+
+static void sca_close(struct net_device *dev)
+{
+ port_t *port = dev_to_port(dev);
+ card_t *card = port_to_card(port);
+
+ /* reset channel */
+ sca_out(CMD_RESET, get_msci(port) + CMD, port_to_card(port));
+ /* disable MSCI interrupts */
+ sca_out(sca_in(IER0, card) & (phy_node(port) ? 0x0F : 0xF0),
+ IER0, card);
+ /* disable DMA interrupts */
+ sca_out(sca_in(IER1, card) & (phy_node(port) ? 0x0F : 0xF0),
+ IER1, card);
+
+ netif_stop_queue(dev);
+}
+
+static int sca_attach(struct net_device *dev, unsigned short encoding,
+ unsigned short parity)
+{
+ if (encoding != ENCODING_NRZ &&
+ encoding != ENCODING_NRZI &&
+ encoding != ENCODING_FM_MARK &&
+ encoding != ENCODING_FM_SPACE &&
+ encoding != ENCODING_MANCHESTER)
+ return -EINVAL;
+
+ if (parity != PARITY_NONE &&
+ parity != PARITY_CRC16_PR0 &&
+ parity != PARITY_CRC16_PR1 &&
+ parity != PARITY_CRC16_PR0_CCITT &&
+ parity != PARITY_CRC16_PR1_CCITT)
+ return -EINVAL;
+
+ dev_to_port(dev)->encoding = encoding;
+ dev_to_port(dev)->parity = parity;
+ return 0;
+}
+
+#ifdef DEBUG_RINGS
+static void sca_dump_rings(struct net_device *dev)
+{
+ port_t *port = dev_to_port(dev);
+ card_t *card = port_to_card(port);
+ u16 cnt;
+#ifndef PAGE0_ALWAYS_MAPPED
+ u8 page = sca_get_page(card);
+
+ openwin(card, 0);
+#endif
+
+ printk(KERN_DEBUG "RX ring: CDA=%u EDA=%u DSR=%02X in=%u %sactive",
+ sca_inw(get_dmac_rx(port) + CDAL, card),
+ sca_inw(get_dmac_rx(port) + EDAL, card),
+ sca_in(DSR_RX(phy_node(port)), card), port->rxin,
+ sca_in(DSR_RX(phy_node(port)), card) & DSR_DE ? "" : "in");
+ for (cnt = 0; cnt < port_to_card(port)->rx_ring_buffers; cnt++)
+ pr_cont(" %02X", readb(&(desc_address(port, cnt, 0)->stat)));
+ pr_cont("\n");
+
+ printk(KERN_DEBUG "TX ring: CDA=%u EDA=%u DSR=%02X in=%u "
+ "last=%u %sactive",
+ sca_inw(get_dmac_tx(port) + CDAL, card),
+ sca_inw(get_dmac_tx(port) + EDAL, card),
+ sca_in(DSR_TX(phy_node(port)), card), port->txin, port->txlast,
+ sca_in(DSR_TX(phy_node(port)), card) & DSR_DE ? "" : "in");
+
+ for (cnt = 0; cnt < port_to_card(port)->tx_ring_buffers; cnt++)
+ pr_cont(" %02X", readb(&(desc_address(port, cnt, 1)->stat)));
+ pr_cont("\n");
+
+ printk(KERN_DEBUG "MSCI: MD: %02x %02x %02x, ST: %02x %02x %02x %02x,"
+ " FST: %02x CST: %02x %02x\n",
+ sca_in(get_msci(port) + MD0, card),
+ sca_in(get_msci(port) + MD1, card),
+ sca_in(get_msci(port) + MD2, card),
+ sca_in(get_msci(port) + ST0, card),
+ sca_in(get_msci(port) + ST1, card),
+ sca_in(get_msci(port) + ST2, card),
+ sca_in(get_msci(port) + ST3, card),
+ sca_in(get_msci(port) + FST, card),
+ sca_in(get_msci(port) + CST0, card),
+ sca_in(get_msci(port) + CST1, card));
+
+ printk(KERN_DEBUG "ISR: %02x %02x %02x\n", sca_in(ISR0, card),
+ sca_in(ISR1, card), sca_in(ISR2, card));
+
+#ifndef PAGE0_ALWAYS_MAPPED
+ openwin(card, page); /* Restore original page */
+#endif
+}
+#endif /* DEBUG_RINGS */
+
+static netdev_tx_t sca_xmit(struct sk_buff *skb, struct net_device *dev)
+{
+ port_t *port = dev_to_port(dev);
+ card_t *card = port_to_card(port);
+ pkt_desc __iomem *desc;
+ u32 buff, len;
+ u8 page;
+ u32 maxlen;
+
+ spin_lock_irq(&port->lock);
+
+ desc = desc_address(port, port->txin + 1, 1);
+ BUG_ON(readb(&desc->stat)); /* previous xmit should stop queue */
+
+#ifdef DEBUG_PKT
+ printk(KERN_DEBUG "%s TX(%i):", dev->name, skb->len);
+ debug_frame(skb);
+#endif
+
+ desc = desc_address(port, port->txin, 1);
+ buff = buffer_offset(port, port->txin, 1);
+ len = skb->len;
+ page = buff / winsize(card);
+ buff = buff % winsize(card);
+ maxlen = winsize(card) - buff;
+
+ openwin(card, page);
+ if (len > maxlen) {
+ memcpy_toio(winbase(card) + buff, skb->data, maxlen);
+ openwin(card, page + 1);
+ memcpy_toio(winbase(card), skb->data + maxlen, len - maxlen);
+ } else {
+ memcpy_toio(winbase(card) + buff, skb->data, len);
+ }
+
+#ifndef PAGE0_ALWAYS_MAPPED
+ openwin(card, 0); /* select pkt_desc table page back */
+#endif
+ writew(len, &desc->len);
+ writeb(ST_TX_EOM, &desc->stat);
+
+ port->txin = next_desc(port, port->txin, 1);
+ sca_outw(desc_offset(port, port->txin, 1),
+ get_dmac_tx(port) + EDAL, card);
+
+ sca_out(DSR_DE, DSR_TX(phy_node(port)), card); /* Enable TX DMA */
+
+ desc = desc_address(port, port->txin + 1, 1);
+ if (readb(&desc->stat)) /* allow 1 packet gap */
+ netif_stop_queue(dev);
+
+ spin_unlock_irq(&port->lock);
+
+ dev_kfree_skb(skb);
+ return NETDEV_TX_OK;
+}
+
+#ifdef NEED_DETECT_RAM
+static u32 sca_detect_ram(card_t *card, u8 __iomem *rambase, u32 ramsize)
+{
+ /* Round RAM size to 32 bits, fill from end to start */
+ u32 i = ramsize &= ~3;
+ u32 size = winsize(card);
+
+ openwin(card, (i - 4) / size); /* select last window */
+
+ do {
+ i -= 4;
+ if ((i + 4) % size == 0)
+ openwin(card, i / size);
+ writel(i ^ 0x12345678, rambase + i % size);
+ } while (i > 0);
+
+ for (i = 0; i < ramsize ; i += 4) {
+ if (i % size == 0)
+ openwin(card, i / size);
+
+ if (readl(rambase + i % size) != (i ^ 0x12345678))
+ break;
+ }
+
+ return i;
+}
+#endif /* NEED_DETECT_RAM */
+
+static void sca_init(card_t *card, int wait_states)
+{
+ sca_out(wait_states, WCRL, card); /* Wait Control */
+ sca_out(wait_states, WCRM, card);
+ sca_out(wait_states, WCRH, card);
+
+ sca_out(0, DMER, card); /* DMA Master disable */
+ sca_out(0x03, PCR, card); /* DMA priority */
+ sca_out(0, DSR_RX(0), card); /* DMA disable - to halt state */
+ sca_out(0, DSR_TX(0), card);
+ sca_out(0, DSR_RX(1), card);
+ sca_out(0, DSR_TX(1), card);
+ sca_out(DMER_DME, DMER, card); /* DMA Master enable */
+}
diff --git a/drivers/net/wan/hd64570.h b/drivers/net/wan/hd64570.h
new file mode 100644
index 000000000..24529996c
--- /dev/null
+++ b/drivers/net/wan/hd64570.h
@@ -0,0 +1,242 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __HD64570_H
+#define __HD64570_H
+
+/* SCA HD64570 register definitions - all addresses for mode 0 (8086 MPU)
+ and 1 (64180 MPU). For modes 2 and 3, XOR the address with 0x01.
+
+ Source: HD64570 SCA User's Manual
+*/
+
+
+
+/* SCA Control Registers */
+#define LPR 0x00 /* Low Power */
+
+/* Wait controller registers */
+#define PABR0 0x02 /* Physical Address Boundary 0 */
+#define PABR1 0x03 /* Physical Address Boundary 1 */
+#define WCRL 0x04 /* Wait Control L */
+#define WCRM 0x05 /* Wait Control M */
+#define WCRH 0x06 /* Wait Control H */
+
+#define PCR 0x08 /* DMA Priority Control */
+#define DMER 0x09 /* DMA Master Enable */
+
+
+/* Interrupt registers */
+#define ISR0 0x10 /* Interrupt Status 0 */
+#define ISR1 0x11 /* Interrupt Status 1 */
+#define ISR2 0x12 /* Interrupt Status 2 */
+
+#define IER0 0x14 /* Interrupt Enable 0 */
+#define IER1 0x15 /* Interrupt Enable 1 */
+#define IER2 0x16 /* Interrupt Enable 2 */
+
+#define ITCR 0x18 /* Interrupt Control */
+#define IVR 0x1A /* Interrupt Vector */
+#define IMVR 0x1C /* Interrupt Modified Vector */
+
+
+
+/* MSCI channel (port) 0 registers - offset 0x20
+ MSCI channel (port) 1 registers - offset 0x40 */
+
+#define MSCI0_OFFSET 0x20
+#define MSCI1_OFFSET 0x40
+
+#define TRBL 0x00 /* TX/RX buffer L */
+#define TRBH 0x01 /* TX/RX buffer H */
+#define ST0 0x02 /* Status 0 */
+#define ST1 0x03 /* Status 1 */
+#define ST2 0x04 /* Status 2 */
+#define ST3 0x05 /* Status 3 */
+#define FST 0x06 /* Frame Status */
+#define IE0 0x08 /* Interrupt Enable 0 */
+#define IE1 0x09 /* Interrupt Enable 1 */
+#define IE2 0x0A /* Interrupt Enable 2 */
+#define FIE 0x0B /* Frame Interrupt Enable */
+#define CMD 0x0C /* Command */
+#define MD0 0x0E /* Mode 0 */
+#define MD1 0x0F /* Mode 1 */
+#define MD2 0x10 /* Mode 2 */
+#define CTL 0x11 /* Control */
+#define SA0 0x12 /* Sync/Address 0 */
+#define SA1 0x13 /* Sync/Address 1 */
+#define IDL 0x14 /* Idle Pattern */
+#define TMC 0x15 /* Time Constant */
+#define RXS 0x16 /* RX Clock Source */
+#define TXS 0x17 /* TX Clock Source */
+#define TRC0 0x18 /* TX Ready Control 0 */
+#define TRC1 0x19 /* TX Ready Control 1 */
+#define RRC 0x1A /* RX Ready Control */
+#define CST0 0x1C /* Current Status 0 */
+#define CST1 0x1D /* Current Status 1 */
+
+
+/* Timer channel 0 (port 0 RX) registers - offset 0x60
+ Timer channel 1 (port 0 TX) registers - offset 0x68
+ Timer channel 2 (port 1 RX) registers - offset 0x70
+ Timer channel 3 (port 1 TX) registers - offset 0x78
+*/
+
+#define TIMER0RX_OFFSET 0x60
+#define TIMER0TX_OFFSET 0x68
+#define TIMER1RX_OFFSET 0x70
+#define TIMER1TX_OFFSET 0x78
+
+#define TCNTL 0x00 /* Up-counter L */
+#define TCNTH 0x01 /* Up-counter H */
+#define TCONRL 0x02 /* Constant L */
+#define TCONRH 0x03 /* Constant H */
+#define TCSR 0x04 /* Control/Status */
+#define TEPR 0x05 /* Expand Prescale */
+
+
+
+/* DMA channel 0 (port 0 RX) registers - offset 0x80
+ DMA channel 1 (port 0 TX) registers - offset 0xA0
+ DMA channel 2 (port 1 RX) registers - offset 0xC0
+ DMA channel 3 (port 1 TX) registers - offset 0xE0
+*/
+
+#define DMAC0RX_OFFSET 0x80
+#define DMAC0TX_OFFSET 0xA0
+#define DMAC1RX_OFFSET 0xC0
+#define DMAC1TX_OFFSET 0xE0
+
+#define BARL 0x00 /* Buffer Address L (chained block) */
+#define BARH 0x01 /* Buffer Address H (chained block) */
+#define BARB 0x02 /* Buffer Address B (chained block) */
+
+#define DARL 0x00 /* RX Destination Addr L (single block) */
+#define DARH 0x01 /* RX Destination Addr H (single block) */
+#define DARB 0x02 /* RX Destination Addr B (single block) */
+
+#define SARL 0x04 /* TX Source Address L (single block) */
+#define SARH 0x05 /* TX Source Address H (single block) */
+#define SARB 0x06 /* TX Source Address B (single block) */
+
+#define CPB 0x06 /* Chain Pointer Base (chained block) */
+
+#define CDAL 0x08 /* Current Descriptor Addr L (chained block) */
+#define CDAH 0x09 /* Current Descriptor Addr H (chained block) */
+#define EDAL 0x0A /* Error Descriptor Addr L (chained block) */
+#define EDAH 0x0B /* Error Descriptor Addr H (chained block) */
+#define BFLL 0x0C /* RX Receive Buffer Length L (chained block)*/
+#define BFLH 0x0D /* RX Receive Buffer Length H (chained block)*/
+#define BCRL 0x0E /* Byte Count L */
+#define BCRH 0x0F /* Byte Count H */
+#define DSR 0x10 /* DMA Status */
+#define DSR_RX(node) (DSR + (node ? DMAC1RX_OFFSET : DMAC0RX_OFFSET))
+#define DSR_TX(node) (DSR + (node ? DMAC1TX_OFFSET : DMAC0TX_OFFSET))
+#define DMR 0x11 /* DMA Mode */
+#define DMR_RX(node) (DMR + (node ? DMAC1RX_OFFSET : DMAC0RX_OFFSET))
+#define DMR_TX(node) (DMR + (node ? DMAC1TX_OFFSET : DMAC0TX_OFFSET))
+#define FCT 0x13 /* Frame End Interrupt Counter */
+#define FCT_RX(node) (FCT + (node ? DMAC1RX_OFFSET : DMAC0RX_OFFSET))
+#define FCT_TX(node) (FCT + (node ? DMAC1TX_OFFSET : DMAC0TX_OFFSET))
+#define DIR 0x14 /* DMA Interrupt Enable */
+#define DIR_RX(node) (DIR + (node ? DMAC1RX_OFFSET : DMAC0RX_OFFSET))
+#define DIR_TX(node) (DIR + (node ? DMAC1TX_OFFSET : DMAC0TX_OFFSET))
+#define DCR 0x15 /* DMA Command */
+#define DCR_RX(node) (DCR + (node ? DMAC1RX_OFFSET : DMAC0RX_OFFSET))
+#define DCR_TX(node) (DCR + (node ? DMAC1TX_OFFSET : DMAC0TX_OFFSET))
+
+
+
+
+/* Descriptor Structure */
+
+typedef struct {
+ u16 cp; /* Chain Pointer */
+ u32 bp; /* Buffer Pointer (24 bits) */
+ u16 len; /* Data Length */
+ u8 stat; /* Status */
+ u8 unused; /* pads to 2-byte boundary */
+}__packed pkt_desc;
+
+
+/* Packet Descriptor Status bits */
+
+#define ST_TX_EOM 0x80 /* End of frame */
+#define ST_TX_EOT 0x01 /* End of transmission */
+
+#define ST_RX_EOM 0x80 /* End of frame */
+#define ST_RX_SHORT 0x40 /* Short frame */
+#define ST_RX_ABORT 0x20 /* Abort */
+#define ST_RX_RESBIT 0x10 /* Residual bit */
+#define ST_RX_OVERRUN 0x08 /* Overrun */
+#define ST_RX_CRC 0x04 /* CRC */
+
+#define ST_ERROR_MASK 0x7C
+
+#define DIR_EOTE 0x80 /* Transfer completed */
+#define DIR_EOME 0x40 /* Frame Transfer Completed (chained-block) */
+#define DIR_BOFE 0x20 /* Buffer Overflow/Underflow (chained-block)*/
+#define DIR_COFE 0x10 /* Counter Overflow (chained-block) */
+
+
+#define DSR_EOT 0x80 /* Transfer completed */
+#define DSR_EOM 0x40 /* Frame Transfer Completed (chained-block) */
+#define DSR_BOF 0x20 /* Buffer Overflow/Underflow (chained-block)*/
+#define DSR_COF 0x10 /* Counter Overflow (chained-block) */
+#define DSR_DE 0x02 /* DMA Enable */
+#define DSR_DWE 0x01 /* DMA Write Disable */
+
+/* DMA Master Enable Register (DMER) bits */
+#define DMER_DME 0x80 /* DMA Master Enable */
+
+
+#define CMD_RESET 0x21 /* Reset Channel */
+#define CMD_TX_ENABLE 0x02 /* Start transmitter */
+#define CMD_RX_ENABLE 0x12 /* Start receiver */
+
+#define MD0_HDLC 0x80 /* Bit-sync HDLC mode */
+#define MD0_CRC_ENA 0x04 /* Enable CRC code calculation */
+#define MD0_CRC_CCITT 0x02 /* CCITT CRC instead of CRC-16 */
+#define MD0_CRC_PR1 0x01 /* Initial all-ones instead of all-zeros */
+
+#define MD0_CRC_NONE 0x00
+#define MD0_CRC_16_0 0x04
+#define MD0_CRC_16 0x05
+#define MD0_CRC_ITU_0 0x06
+#define MD0_CRC_ITU 0x07
+
+#define MD2_NRZ 0x00
+#define MD2_NRZI 0x20
+#define MD2_MANCHESTER 0x80
+#define MD2_FM_MARK 0xA0
+#define MD2_FM_SPACE 0xC0
+#define MD2_LOOPBACK 0x03 /* Local data Loopback */
+
+#define CTL_NORTS 0x01
+#define CTL_IDLE 0x10 /* Transmit an idle pattern */
+#define CTL_UDRNC 0x20 /* Idle after CRC or FCS+flag transmission */
+
+#define ST0_TXRDY 0x02 /* TX ready */
+#define ST0_RXRDY 0x01 /* RX ready */
+
+#define ST1_UDRN 0x80 /* MSCI TX underrun */
+#define ST1_CDCD 0x04 /* DCD level changed */
+
+#define ST3_CTS 0x08 /* modem input - /CTS */
+#define ST3_DCD 0x04 /* modem input - /DCD */
+
+#define IE0_TXINT 0x80 /* TX INT MSCI interrupt enable */
+#define IE0_RXINTA 0x40 /* RX INT A MSCI interrupt enable */
+#define IE1_UDRN 0x80 /* TX underrun MSCI interrupt enable */
+#define IE1_CDCD 0x04 /* DCD level changed */
+
+#define DCR_ABORT 0x01 /* Software abort command */
+#define DCR_CLEAR_EOF 0x02 /* Clear EOF interrupt */
+
+/* TX and RX Clock Source - RXS and TXS */
+#define CLK_BRG_MASK 0x0F
+#define CLK_LINE_RX 0x00 /* TX/RX clock line input */
+#define CLK_LINE_TX 0x00 /* TX/RX line input */
+#define CLK_BRG_RX 0x40 /* internal baud rate generator */
+#define CLK_BRG_TX 0x40 /* internal baud rate generator */
+#define CLK_RXCLK_TX 0x60 /* TX clock from RX clock */
+
+#endif
diff --git a/drivers/net/wan/hd64572.c b/drivers/net/wan/hd64572.c
new file mode 100644
index 000000000..534369ffe
--- /dev/null
+++ b/drivers/net/wan/hd64572.c
@@ -0,0 +1,636 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Hitachi (now Renesas) SCA-II HD64572 driver for Linux
+ *
+ * Copyright (C) 1998-2008 Krzysztof Halasa <khc@pm.waw.pl>
+ *
+ * Source of information: HD64572 SCA-II User's Manual
+ *
+ * We use the following SCA memory map:
+ *
+ * Packet buffer descriptor rings - starting from card->rambase:
+ * rx_ring_buffers * sizeof(pkt_desc) = logical channel #0 RX ring
+ * tx_ring_buffers * sizeof(pkt_desc) = logical channel #0 TX ring
+ * rx_ring_buffers * sizeof(pkt_desc) = logical channel #1 RX ring (if used)
+ * tx_ring_buffers * sizeof(pkt_desc) = logical channel #1 TX ring (if used)
+ *
+ * Packet data buffers - starting from card->rambase + buff_offset:
+ * rx_ring_buffers * HDLC_MAX_MRU = logical channel #0 RX buffers
+ * tx_ring_buffers * HDLC_MAX_MRU = logical channel #0 TX buffers
+ * rx_ring_buffers * HDLC_MAX_MRU = logical channel #0 RX buffers (if used)
+ * tx_ring_buffers * HDLC_MAX_MRU = logical channel #0 TX buffers (if used)
+ */
+
+#include <linux/bitops.h>
+#include <linux/errno.h>
+#include <linux/fcntl.h>
+#include <linux/hdlc.h>
+#include <linux/in.h>
+#include <linux/interrupt.h>
+#include <linux/ioport.h>
+#include <linux/jiffies.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/netdevice.h>
+#include <linux/skbuff.h>
+#include <linux/string.h>
+#include <linux/types.h>
+#include <asm/io.h>
+#include <linux/uaccess.h>
+#include "hd64572.h"
+
+#define NAPI_WEIGHT 16
+
+#define get_msci(port) ((port)->chan ? MSCI1_OFFSET : MSCI0_OFFSET)
+#define get_dmac_rx(port) ((port)->chan ? DMAC1RX_OFFSET : DMAC0RX_OFFSET)
+#define get_dmac_tx(port) ((port)->chan ? DMAC1TX_OFFSET : DMAC0TX_OFFSET)
+
+#define sca_in(reg, card) readb((card)->scabase + (reg))
+#define sca_out(value, reg, card) writeb(value, (card)->scabase + (reg))
+#define sca_inw(reg, card) readw((card)->scabase + (reg))
+#define sca_outw(value, reg, card) writew(value, (card)->scabase + (reg))
+#define sca_inl(reg, card) readl((card)->scabase + (reg))
+#define sca_outl(value, reg, card) writel(value, (card)->scabase + (reg))
+
+static int sca_poll(struct napi_struct *napi, int budget);
+
+static inline port_t *dev_to_port(struct net_device *dev)
+{
+ return dev_to_hdlc(dev)->priv;
+}
+
+static inline void enable_intr(port_t *port)
+{
+ /* enable DMIB and MSCI RXINTA interrupts */
+ sca_outl(sca_inl(IER0, port->card) |
+ (port->chan ? 0x08002200 : 0x00080022), IER0, port->card);
+}
+
+static inline void disable_intr(port_t *port)
+{
+ sca_outl(sca_inl(IER0, port->card) &
+ (port->chan ? 0x00FF00FF : 0xFF00FF00), IER0, port->card);
+}
+
+static inline u16 desc_abs_number(port_t *port, u16 desc, int transmit)
+{
+ u16 rx_buffs = port->card->rx_ring_buffers;
+ u16 tx_buffs = port->card->tx_ring_buffers;
+
+ desc %= (transmit ? tx_buffs : rx_buffs); // called with "X + 1" etc.
+ return port->chan * (rx_buffs + tx_buffs) + transmit * rx_buffs + desc;
+}
+
+static inline u16 desc_offset(port_t *port, u16 desc, int transmit)
+{
+ /* Descriptor offset always fits in 16 bits */
+ return desc_abs_number(port, desc, transmit) * sizeof(pkt_desc);
+}
+
+static inline pkt_desc __iomem *desc_address(port_t *port, u16 desc,
+ int transmit)
+{
+ return (pkt_desc __iomem *)(port->card->rambase +
+ desc_offset(port, desc, transmit));
+}
+
+static inline u32 buffer_offset(port_t *port, u16 desc, int transmit)
+{
+ return port->card->buff_offset +
+ desc_abs_number(port, desc, transmit) * (u32)HDLC_MAX_MRU;
+}
+
+static inline void sca_set_carrier(port_t *port)
+{
+ if (!(sca_in(get_msci(port) + ST3, port->card) & ST3_DCD)) {
+#ifdef DEBUG_LINK
+ printk(KERN_DEBUG "%s: sca_set_carrier on\n",
+ port->netdev.name);
+#endif
+ netif_carrier_on(port->netdev);
+ } else {
+#ifdef DEBUG_LINK
+ printk(KERN_DEBUG "%s: sca_set_carrier off\n",
+ port->netdev.name);
+#endif
+ netif_carrier_off(port->netdev);
+ }
+}
+
+static void sca_init_port(port_t *port)
+{
+ card_t *card = port->card;
+ u16 dmac_rx = get_dmac_rx(port), dmac_tx = get_dmac_tx(port);
+ int transmit, i;
+
+ port->rxin = 0;
+ port->txin = 0;
+ port->txlast = 0;
+
+ for (transmit = 0; transmit < 2; transmit++) {
+ u16 buffs = transmit ? card->tx_ring_buffers
+ : card->rx_ring_buffers;
+
+ for (i = 0; i < buffs; i++) {
+ pkt_desc __iomem *desc = desc_address(port, i, transmit);
+ u16 chain_off = desc_offset(port, i + 1, transmit);
+ u32 buff_off = buffer_offset(port, i, transmit);
+
+ writel(chain_off, &desc->cp);
+ writel(buff_off, &desc->bp);
+ writew(0, &desc->len);
+ writeb(0, &desc->stat);
+ }
+ }
+
+ /* DMA disable - to halt state */
+ sca_out(0, DSR_RX(port->chan), card);
+ sca_out(0, DSR_TX(port->chan), card);
+
+ /* software ABORT - to initial state */
+ sca_out(DCR_ABORT, DCR_RX(port->chan), card);
+ sca_out(DCR_ABORT, DCR_TX(port->chan), card);
+
+ /* current desc addr */
+ sca_outl(desc_offset(port, 0, 0), dmac_rx + CDAL, card);
+ sca_outl(desc_offset(port, card->tx_ring_buffers - 1, 0),
+ dmac_rx + EDAL, card);
+ sca_outl(desc_offset(port, 0, 1), dmac_tx + CDAL, card);
+ sca_outl(desc_offset(port, 0, 1), dmac_tx + EDAL, card);
+
+ /* clear frame end interrupt counter */
+ sca_out(DCR_CLEAR_EOF, DCR_RX(port->chan), card);
+ sca_out(DCR_CLEAR_EOF, DCR_TX(port->chan), card);
+
+ /* Receive */
+ sca_outw(HDLC_MAX_MRU, dmac_rx + BFLL, card); /* set buffer length */
+ sca_out(0x14, DMR_RX(port->chan), card); /* Chain mode, Multi-frame */
+ sca_out(DIR_EOME, DIR_RX(port->chan), card); /* enable interrupts */
+ sca_out(DSR_DE, DSR_RX(port->chan), card); /* DMA enable */
+
+ /* Transmit */
+ sca_out(0x14, DMR_TX(port->chan), card); /* Chain mode, Multi-frame */
+ sca_out(DIR_EOME, DIR_TX(port->chan), card); /* enable interrupts */
+
+ sca_set_carrier(port);
+ netif_napi_add_weight(port->netdev, &port->napi, sca_poll,
+ NAPI_WEIGHT);
+}
+
+/* MSCI interrupt service */
+static inline void sca_msci_intr(port_t *port)
+{
+ u16 msci = get_msci(port);
+ card_t *card = port->card;
+
+ if (sca_in(msci + ST1, card) & ST1_CDCD) {
+ /* Reset MSCI CDCD status bit */
+ sca_out(ST1_CDCD, msci + ST1, card);
+ sca_set_carrier(port);
+ }
+}
+
+static inline void sca_rx(card_t *card, port_t *port, pkt_desc __iomem *desc,
+ u16 rxin)
+{
+ struct net_device *dev = port->netdev;
+ struct sk_buff *skb;
+ u16 len;
+ u32 buff;
+
+ len = readw(&desc->len);
+ skb = dev_alloc_skb(len);
+ if (!skb) {
+ dev->stats.rx_dropped++;
+ return;
+ }
+
+ buff = buffer_offset(port, rxin, 0);
+ memcpy_fromio(skb->data, card->rambase + buff, len);
+
+ skb_put(skb, len);
+#ifdef DEBUG_PKT
+ printk(KERN_DEBUG "%s RX(%i):", dev->name, skb->len);
+ debug_frame(skb);
+#endif
+ dev->stats.rx_packets++;
+ dev->stats.rx_bytes += skb->len;
+ skb->protocol = hdlc_type_trans(skb, dev);
+ netif_receive_skb(skb);
+}
+
+/* Receive DMA service */
+static inline int sca_rx_done(port_t *port, int budget)
+{
+ struct net_device *dev = port->netdev;
+ u16 dmac = get_dmac_rx(port);
+ card_t *card = port->card;
+ u8 stat = sca_in(DSR_RX(port->chan), card); /* read DMA Status */
+ int received = 0;
+
+ /* Reset DSR status bits */
+ sca_out((stat & (DSR_EOT | DSR_EOM | DSR_BOF | DSR_COF)) | DSR_DWE,
+ DSR_RX(port->chan), card);
+
+ if (stat & DSR_BOF)
+ /* Dropped one or more frames */
+ dev->stats.rx_over_errors++;
+
+ while (received < budget) {
+ u32 desc_off = desc_offset(port, port->rxin, 0);
+ pkt_desc __iomem *desc;
+ u32 cda = sca_inl(dmac + CDAL, card);
+
+ if ((cda >= desc_off) && (cda < desc_off + sizeof(pkt_desc)))
+ break; /* No frame received */
+
+ desc = desc_address(port, port->rxin, 0);
+ stat = readb(&desc->stat);
+ if (!(stat & ST_RX_EOM))
+ port->rxpart = 1; /* partial frame received */
+ else if ((stat & ST_ERROR_MASK) || port->rxpart) {
+ dev->stats.rx_errors++;
+ if (stat & ST_RX_OVERRUN)
+ dev->stats.rx_fifo_errors++;
+ else if ((stat & (ST_RX_SHORT | ST_RX_ABORT |
+ ST_RX_RESBIT)) || port->rxpart)
+ dev->stats.rx_frame_errors++;
+ else if (stat & ST_RX_CRC)
+ dev->stats.rx_crc_errors++;
+ if (stat & ST_RX_EOM)
+ port->rxpart = 0; /* received last fragment */
+ } else {
+ sca_rx(card, port, desc, port->rxin);
+ received++;
+ }
+
+ /* Set new error descriptor address */
+ sca_outl(desc_off, dmac + EDAL, card);
+ port->rxin = (port->rxin + 1) % card->rx_ring_buffers;
+ }
+
+ /* make sure RX DMA is enabled */
+ sca_out(DSR_DE, DSR_RX(port->chan), card);
+ return received;
+}
+
+/* Transmit DMA service */
+static inline void sca_tx_done(port_t *port)
+{
+ struct net_device *dev = port->netdev;
+ card_t *card = port->card;
+ u8 stat;
+ unsigned count = 0;
+
+ spin_lock(&port->lock);
+
+ stat = sca_in(DSR_TX(port->chan), card); /* read DMA Status */
+
+ /* Reset DSR status bits */
+ sca_out((stat & (DSR_EOT | DSR_EOM | DSR_BOF | DSR_COF)) | DSR_DWE,
+ DSR_TX(port->chan), card);
+
+ while (1) {
+ pkt_desc __iomem *desc = desc_address(port, port->txlast, 1);
+ u8 stat = readb(&desc->stat);
+
+ if (!(stat & ST_TX_OWNRSHP))
+ break; /* not yet transmitted */
+ if (stat & ST_TX_UNDRRUN) {
+ dev->stats.tx_errors++;
+ dev->stats.tx_fifo_errors++;
+ } else {
+ dev->stats.tx_packets++;
+ dev->stats.tx_bytes += readw(&desc->len);
+ }
+ writeb(0, &desc->stat); /* Free descriptor */
+ count++;
+ port->txlast = (port->txlast + 1) % card->tx_ring_buffers;
+ }
+
+ if (count)
+ netif_wake_queue(dev);
+ spin_unlock(&port->lock);
+}
+
+static int sca_poll(struct napi_struct *napi, int budget)
+{
+ port_t *port = container_of(napi, port_t, napi);
+ u32 isr0 = sca_inl(ISR0, port->card);
+ int received = 0;
+
+ if (isr0 & (port->chan ? 0x08000000 : 0x00080000))
+ sca_msci_intr(port);
+
+ if (isr0 & (port->chan ? 0x00002000 : 0x00000020))
+ sca_tx_done(port);
+
+ if (isr0 & (port->chan ? 0x00000200 : 0x00000002))
+ received = sca_rx_done(port, budget);
+
+ if (received < budget) {
+ napi_complete_done(napi, received);
+ enable_intr(port);
+ }
+
+ return received;
+}
+
+static irqreturn_t sca_intr(int irq, void *dev_id)
+{
+ card_t *card = dev_id;
+ u32 isr0 = sca_inl(ISR0, card);
+ int i, handled = 0;
+
+ for (i = 0; i < 2; i++) {
+ port_t *port = get_port(card, i);
+ if (port && (isr0 & (i ? 0x08002200 : 0x00080022))) {
+ handled = 1;
+ disable_intr(port);
+ napi_schedule(&port->napi);
+ }
+ }
+
+ return IRQ_RETVAL(handled);
+}
+
+static void sca_set_port(port_t *port)
+{
+ card_t *card = port->card;
+ u16 msci = get_msci(port);
+ u8 md2 = sca_in(msci + MD2, card);
+ unsigned int tmc, br = 10, brv = 1024;
+
+ if (port->settings.clock_rate > 0) {
+ /* Try lower br for better accuracy*/
+ do {
+ br--;
+ brv >>= 1; /* brv = 2^9 = 512 max in specs */
+
+ /* Baud Rate = CLOCK_BASE / TMC / 2^BR */
+ tmc = CLOCK_BASE / brv / port->settings.clock_rate;
+ } while (br > 1 && tmc <= 128);
+
+ if (tmc < 1) {
+ tmc = 1;
+ br = 0; /* For baud=CLOCK_BASE we use tmc=1 br=0 */
+ brv = 1;
+ } else if (tmc > 255) {
+ tmc = 256; /* tmc=0 means 256 - low baud rates */
+ }
+
+ port->settings.clock_rate = CLOCK_BASE / brv / tmc;
+ } else {
+ br = 9; /* Minimum clock rate */
+ tmc = 256; /* 8bit = 0 */
+ port->settings.clock_rate = CLOCK_BASE / (256 * 512);
+ }
+
+ port->rxs = (port->rxs & ~CLK_BRG_MASK) | br;
+ port->txs = (port->txs & ~CLK_BRG_MASK) | br;
+ port->tmc = tmc;
+
+ /* baud divisor - time constant*/
+ sca_out(port->tmc, msci + TMCR, card);
+ sca_out(port->tmc, msci + TMCT, card);
+
+ /* Set BRG bits */
+ sca_out(port->rxs, msci + RXS, card);
+ sca_out(port->txs, msci + TXS, card);
+
+ if (port->settings.loopback)
+ md2 |= MD2_LOOPBACK;
+ else
+ md2 &= ~MD2_LOOPBACK;
+
+ sca_out(md2, msci + MD2, card);
+}
+
+static void sca_open(struct net_device *dev)
+{
+ port_t *port = dev_to_port(dev);
+ card_t *card = port->card;
+ u16 msci = get_msci(port);
+ u8 md0, md2;
+
+ switch (port->encoding) {
+ case ENCODING_NRZ:
+ md2 = MD2_NRZ;
+ break;
+ case ENCODING_NRZI:
+ md2 = MD2_NRZI;
+ break;
+ case ENCODING_FM_MARK:
+ md2 = MD2_FM_MARK;
+ break;
+ case ENCODING_FM_SPACE:
+ md2 = MD2_FM_SPACE;
+ break;
+ default:
+ md2 = MD2_MANCHESTER;
+ }
+
+ if (port->settings.loopback)
+ md2 |= MD2_LOOPBACK;
+
+ switch (port->parity) {
+ case PARITY_CRC16_PR0:
+ md0 = MD0_HDLC | MD0_CRC_16_0;
+ break;
+ case PARITY_CRC16_PR1:
+ md0 = MD0_HDLC | MD0_CRC_16;
+ break;
+ case PARITY_CRC32_PR1_CCITT:
+ md0 = MD0_HDLC | MD0_CRC_ITU32;
+ break;
+ case PARITY_CRC16_PR1_CCITT:
+ md0 = MD0_HDLC | MD0_CRC_ITU;
+ break;
+ default:
+ md0 = MD0_HDLC | MD0_CRC_NONE;
+ }
+
+ sca_out(CMD_RESET, msci + CMD, card);
+ sca_out(md0, msci + MD0, card);
+ sca_out(0x00, msci + MD1, card); /* no address field check */
+ sca_out(md2, msci + MD2, card);
+ sca_out(0x7E, msci + IDL, card); /* flag character 0x7E */
+ /* Skip the rest of underrun frame */
+ sca_out(CTL_IDLE | CTL_URCT | CTL_URSKP, msci + CTL, card);
+ sca_out(0x0F, msci + RNR, card); /* +1=RX DMA activation condition */
+ sca_out(0x3C, msci + TFS, card); /* +1 = TX start */
+ sca_out(0x38, msci + TCR, card); /* =Critical TX DMA activ condition */
+ sca_out(0x38, msci + TNR0, card); /* =TX DMA activation condition */
+ sca_out(0x3F, msci + TNR1, card); /* +1=TX DMA deactivation condition*/
+
+/* We're using the following interrupts:
+ - RXINTA (DCD changes only)
+ - DMIB (EOM - single frame transfer complete)
+*/
+ sca_outl(IE0_RXINTA | IE0_CDCD, msci + IE0, card);
+
+ sca_out(port->tmc, msci + TMCR, card);
+ sca_out(port->tmc, msci + TMCT, card);
+ sca_out(port->rxs, msci + RXS, card);
+ sca_out(port->txs, msci + TXS, card);
+ sca_out(CMD_TX_ENABLE, msci + CMD, card);
+ sca_out(CMD_RX_ENABLE, msci + CMD, card);
+
+ sca_set_carrier(port);
+ enable_intr(port);
+ napi_enable(&port->napi);
+ netif_start_queue(dev);
+}
+
+static void sca_close(struct net_device *dev)
+{
+ port_t *port = dev_to_port(dev);
+
+ /* reset channel */
+ sca_out(CMD_RESET, get_msci(port) + CMD, port->card);
+ disable_intr(port);
+ napi_disable(&port->napi);
+ netif_stop_queue(dev);
+}
+
+static int sca_attach(struct net_device *dev, unsigned short encoding,
+ unsigned short parity)
+{
+ if (encoding != ENCODING_NRZ &&
+ encoding != ENCODING_NRZI &&
+ encoding != ENCODING_FM_MARK &&
+ encoding != ENCODING_FM_SPACE &&
+ encoding != ENCODING_MANCHESTER)
+ return -EINVAL;
+
+ if (parity != PARITY_NONE &&
+ parity != PARITY_CRC16_PR0 &&
+ parity != PARITY_CRC16_PR1 &&
+ parity != PARITY_CRC32_PR1_CCITT &&
+ parity != PARITY_CRC16_PR1_CCITT)
+ return -EINVAL;
+
+ dev_to_port(dev)->encoding = encoding;
+ dev_to_port(dev)->parity = parity;
+ return 0;
+}
+
+#ifdef DEBUG_RINGS
+static void sca_dump_rings(struct net_device *dev)
+{
+ port_t *port = dev_to_port(dev);
+ card_t *card = port->card;
+ u16 cnt;
+
+ printk(KERN_DEBUG "RX ring: CDA=%u EDA=%u DSR=%02X in=%u %sactive",
+ sca_inl(get_dmac_rx(port) + CDAL, card),
+ sca_inl(get_dmac_rx(port) + EDAL, card),
+ sca_in(DSR_RX(port->chan), card), port->rxin,
+ sca_in(DSR_RX(port->chan), card) & DSR_DE ? "" : "in");
+ for (cnt = 0; cnt < port->card->rx_ring_buffers; cnt++)
+ pr_cont(" %02X", readb(&(desc_address(port, cnt, 0)->stat)));
+ pr_cont("\n");
+
+ printk(KERN_DEBUG "TX ring: CDA=%u EDA=%u DSR=%02X in=%u "
+ "last=%u %sactive",
+ sca_inl(get_dmac_tx(port) + CDAL, card),
+ sca_inl(get_dmac_tx(port) + EDAL, card),
+ sca_in(DSR_TX(port->chan), card), port->txin, port->txlast,
+ sca_in(DSR_TX(port->chan), card) & DSR_DE ? "" : "in");
+
+ for (cnt = 0; cnt < port->card->tx_ring_buffers; cnt++)
+ pr_cont(" %02X", readb(&(desc_address(port, cnt, 1)->stat)));
+ pr_cont("\n");
+
+ printk(KERN_DEBUG "MSCI: MD: %02x %02x %02x,"
+ " ST: %02x %02x %02x %02x %02x, FST: %02x CST: %02x %02x\n",
+ sca_in(get_msci(port) + MD0, card),
+ sca_in(get_msci(port) + MD1, card),
+ sca_in(get_msci(port) + MD2, card),
+ sca_in(get_msci(port) + ST0, card),
+ sca_in(get_msci(port) + ST1, card),
+ sca_in(get_msci(port) + ST2, card),
+ sca_in(get_msci(port) + ST3, card),
+ sca_in(get_msci(port) + ST4, card),
+ sca_in(get_msci(port) + FST, card),
+ sca_in(get_msci(port) + CST0, card),
+ sca_in(get_msci(port) + CST1, card));
+
+ printk(KERN_DEBUG "ILAR: %02x ISR: %08x %08x\n", sca_in(ILAR, card),
+ sca_inl(ISR0, card), sca_inl(ISR1, card));
+}
+#endif /* DEBUG_RINGS */
+
+static netdev_tx_t sca_xmit(struct sk_buff *skb, struct net_device *dev)
+{
+ port_t *port = dev_to_port(dev);
+ card_t *card = port->card;
+ pkt_desc __iomem *desc;
+ u32 buff, len;
+
+ spin_lock_irq(&port->lock);
+
+ desc = desc_address(port, port->txin + 1, 1);
+ BUG_ON(readb(&desc->stat)); /* previous xmit should stop queue */
+
+#ifdef DEBUG_PKT
+ printk(KERN_DEBUG "%s TX(%i):", dev->name, skb->len);
+ debug_frame(skb);
+#endif
+
+ desc = desc_address(port, port->txin, 1);
+ buff = buffer_offset(port, port->txin, 1);
+ len = skb->len;
+ memcpy_toio(card->rambase + buff, skb->data, len);
+
+ writew(len, &desc->len);
+ writeb(ST_TX_EOM, &desc->stat);
+
+ port->txin = (port->txin + 1) % card->tx_ring_buffers;
+ sca_outl(desc_offset(port, port->txin, 1),
+ get_dmac_tx(port) + EDAL, card);
+
+ sca_out(DSR_DE, DSR_TX(port->chan), card); /* Enable TX DMA */
+
+ desc = desc_address(port, port->txin + 1, 1);
+ if (readb(&desc->stat)) /* allow 1 packet gap */
+ netif_stop_queue(dev);
+
+ spin_unlock_irq(&port->lock);
+
+ dev_kfree_skb(skb);
+ return NETDEV_TX_OK;
+}
+
+static u32 sca_detect_ram(card_t *card, u8 __iomem *rambase, u32 ramsize)
+{
+ /* Round RAM size to 32 bits, fill from end to start */
+ u32 i = ramsize &= ~3;
+
+ do {
+ i -= 4;
+ writel(i ^ 0x12345678, rambase + i);
+ } while (i > 0);
+
+ for (i = 0; i < ramsize ; i += 4) {
+ if (readl(rambase + i) != (i ^ 0x12345678))
+ break;
+ }
+
+ return i;
+}
+
+static void sca_init(card_t *card, int wait_states)
+{
+ sca_out(wait_states, WCRL, card); /* Wait Control */
+ sca_out(wait_states, WCRM, card);
+ sca_out(wait_states, WCRH, card);
+
+ sca_out(0, DMER, card); /* DMA Master disable */
+ sca_out(0x03, PCR, card); /* DMA priority */
+ sca_out(0, DSR_RX(0), card); /* DMA disable - to halt state */
+ sca_out(0, DSR_TX(0), card);
+ sca_out(0, DSR_RX(1), card);
+ sca_out(0, DSR_TX(1), card);
+ sca_out(DMER_DME, DMER, card); /* DMA Master enable */
+}
diff --git a/drivers/net/wan/hd64572.h b/drivers/net/wan/hd64572.h
new file mode 100644
index 000000000..9c87b8628
--- /dev/null
+++ b/drivers/net/wan/hd64572.h
@@ -0,0 +1,522 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * hd64572.h Description of the Hitachi HD64572 (SCA-II), valid for
+ * CPU modes 0 & 2.
+ *
+ * Author: Ivan Passos <ivan@cyclades.com>
+ *
+ * Copyright: (c) 2000-2001 Cyclades Corp.
+ *
+ * $Log: hd64572.h,v $
+ * Revision 3.1 2001/06/15 12:41:10 regina
+ * upping major version number
+ *
+ * Revision 1.1.1.1 2001/06/13 20:24:49 daniela
+ * PC300 initial CVS version (3.4.0-pre1)
+ *
+ * Revision 1.0 2000/01/25 ivan
+ * Initial version.
+ */
+
+#ifndef __HD64572_H
+#define __HD64572_H
+
+/* Illegal Access Register */
+#define ILAR 0x00
+
+/* Wait Controller Registers */
+#define PABR0L 0x20 /* Physical Addr Boundary Register 0 L */
+#define PABR0H 0x21 /* Physical Addr Boundary Register 0 H */
+#define PABR1L 0x22 /* Physical Addr Boundary Register 1 L */
+#define PABR1H 0x23 /* Physical Addr Boundary Register 1 H */
+#define WCRL 0x24 /* Wait Control Register L */
+#define WCRM 0x25 /* Wait Control Register M */
+#define WCRH 0x26 /* Wait Control Register H */
+
+/* Interrupt Registers */
+#define IVR 0x60 /* Interrupt Vector Register */
+#define IMVR 0x64 /* Interrupt Modified Vector Register */
+#define ITCR 0x68 /* Interrupt Control Register */
+#define ISR0 0x6c /* Interrupt Status Register 0 */
+#define ISR1 0x70 /* Interrupt Status Register 1 */
+#define IER0 0x74 /* Interrupt Enable Register 0 */
+#define IER1 0x78 /* Interrupt Enable Register 1 */
+
+/* Register Access Macros (chan is 0 or 1 in _any_ case) */
+#define M_REG(reg, chan) (reg + 0x80*chan) /* MSCI */
+#define DRX_REG(reg, chan) (reg + 0x40*chan) /* DMA Rx */
+#define DTX_REG(reg, chan) (reg + 0x20*(2*chan + 1)) /* DMA Tx */
+#define TRX_REG(reg, chan) (reg + 0x20*chan) /* Timer Rx */
+#define TTX_REG(reg, chan) (reg + 0x10*(2*chan + 1)) /* Timer Tx */
+#define ST_REG(reg, chan) (reg + 0x80*chan) /* Status Cnt */
+#define IR0_DRX(val, chan) ((val)<<(8*(chan))) /* Int DMA Rx */
+#define IR0_DTX(val, chan) ((val)<<(4*(2*chan + 1))) /* Int DMA Tx */
+#define IR0_M(val, chan) ((val)<<(8*(chan))) /* Int MSCI */
+
+/* MSCI Channel Registers */
+#define MSCI0_OFFSET 0x00
+#define MSCI1_OFFSET 0x80
+
+#define MD0 0x138 /* Mode reg 0 */
+#define MD1 0x139 /* Mode reg 1 */
+#define MD2 0x13a /* Mode reg 2 */
+#define MD3 0x13b /* Mode reg 3 */
+#define CTL 0x130 /* Control reg */
+#define RXS 0x13c /* RX clock source */
+#define TXS 0x13d /* TX clock source */
+#define EXS 0x13e /* External clock input selection */
+#define TMCT 0x144 /* Time constant (Tx) */
+#define TMCR 0x145 /* Time constant (Rx) */
+#define CMD 0x128 /* Command reg */
+#define ST0 0x118 /* Status reg 0 */
+#define ST1 0x119 /* Status reg 1 */
+#define ST2 0x11a /* Status reg 2 */
+#define ST3 0x11b /* Status reg 3 */
+#define ST4 0x11c /* Status reg 4 */
+#define FST 0x11d /* frame Status reg */
+#define IE0 0x120 /* Interrupt enable reg 0 */
+#define IE1 0x121 /* Interrupt enable reg 1 */
+#define IE2 0x122 /* Interrupt enable reg 2 */
+#define IE4 0x124 /* Interrupt enable reg 4 */
+#define FIE 0x125 /* Frame Interrupt enable reg */
+#define SA0 0x140 /* Syn Address reg 0 */
+#define SA1 0x141 /* Syn Address reg 1 */
+#define IDL 0x142 /* Idle register */
+#define TRBL 0x100 /* TX/RX buffer reg L */
+#define TRBK 0x101 /* TX/RX buffer reg K */
+#define TRBJ 0x102 /* TX/RX buffer reg J */
+#define TRBH 0x103 /* TX/RX buffer reg H */
+#define TRC0 0x148 /* TX Ready control reg 0 */
+#define TRC1 0x149 /* TX Ready control reg 1 */
+#define RRC 0x14a /* RX Ready control reg */
+#define CST0 0x108 /* Current Status Register 0 */
+#define CST1 0x109 /* Current Status Register 1 */
+#define CST2 0x10a /* Current Status Register 2 */
+#define CST3 0x10b /* Current Status Register 3 */
+#define GPO 0x131 /* General Purpose Output Pin Ctl Reg */
+#define TFS 0x14b /* Tx Start Threshold Ctl Reg */
+#define TFN 0x143 /* Inter-transmit-frame Time Fill Ctl Reg */
+#define TBN 0x110 /* Tx Buffer Number Reg */
+#define RBN 0x111 /* Rx Buffer Number Reg */
+#define TNR0 0x150 /* Tx DMA Request Ctl Reg 0 */
+#define TNR1 0x151 /* Tx DMA Request Ctl Reg 1 */
+#define TCR 0x152 /* Tx DMA Critical Request Reg */
+#define RNR 0x154 /* Rx DMA Request Ctl Reg */
+#define RCR 0x156 /* Rx DMA Critical Request Reg */
+
+/* Timer Registers */
+#define TIMER0RX_OFFSET 0x00
+#define TIMER0TX_OFFSET 0x10
+#define TIMER1RX_OFFSET 0x20
+#define TIMER1TX_OFFSET 0x30
+
+#define TCNTL 0x200 /* Timer Upcounter L */
+#define TCNTH 0x201 /* Timer Upcounter H */
+#define TCONRL 0x204 /* Timer Constant Register L */
+#define TCONRH 0x205 /* Timer Constant Register H */
+#define TCSR 0x206 /* Timer Control/Status Register */
+#define TEPR 0x207 /* Timer Expand Prescale Register */
+
+/* DMA registers */
+#define PCR 0x40 /* DMA priority control reg */
+#define DRR 0x44 /* DMA reset reg */
+#define DMER 0x07 /* DMA Master Enable reg */
+#define BTCR 0x08 /* Burst Tx Ctl Reg */
+#define BOLR 0x0c /* Back-off Length Reg */
+#define DSR_RX(chan) (0x48 + 2*chan) /* DMA Status Reg (Rx) */
+#define DSR_TX(chan) (0x49 + 2*chan) /* DMA Status Reg (Tx) */
+#define DIR_RX(chan) (0x4c + 2*chan) /* DMA Interrupt Enable Reg (Rx) */
+#define DIR_TX(chan) (0x4d + 2*chan) /* DMA Interrupt Enable Reg (Tx) */
+#define FCT_RX(chan) (0x50 + 2*chan) /* Frame End Interrupt Counter (Rx) */
+#define FCT_TX(chan) (0x51 + 2*chan) /* Frame End Interrupt Counter (Tx) */
+#define DMR_RX(chan) (0x54 + 2*chan) /* DMA Mode Reg (Rx) */
+#define DMR_TX(chan) (0x55 + 2*chan) /* DMA Mode Reg (Tx) */
+#define DCR_RX(chan) (0x58 + 2*chan) /* DMA Command Reg (Rx) */
+#define DCR_TX(chan) (0x59 + 2*chan) /* DMA Command Reg (Tx) */
+
+/* DMA Channel Registers */
+#define DMAC0RX_OFFSET 0x00
+#define DMAC0TX_OFFSET 0x20
+#define DMAC1RX_OFFSET 0x40
+#define DMAC1TX_OFFSET 0x60
+
+#define DARL 0x80 /* Dest Addr Register L (single-block, RX only) */
+#define DARH 0x81 /* Dest Addr Register H (single-block, RX only) */
+#define DARB 0x82 /* Dest Addr Register B (single-block, RX only) */
+#define DARBH 0x83 /* Dest Addr Register BH (single-block, RX only) */
+#define SARL 0x80 /* Source Addr Register L (single-block, TX only) */
+#define SARH 0x81 /* Source Addr Register H (single-block, TX only) */
+#define SARB 0x82 /* Source Addr Register B (single-block, TX only) */
+#define DARBH 0x83 /* Source Addr Register BH (single-block, TX only) */
+#define BARL 0x80 /* Buffer Addr Register L (chained-block) */
+#define BARH 0x81 /* Buffer Addr Register H (chained-block) */
+#define BARB 0x82 /* Buffer Addr Register B (chained-block) */
+#define BARBH 0x83 /* Buffer Addr Register BH (chained-block) */
+#define CDAL 0x84 /* Current Descriptor Addr Register L */
+#define CDAH 0x85 /* Current Descriptor Addr Register H */
+#define CDAB 0x86 /* Current Descriptor Addr Register B */
+#define CDABH 0x87 /* Current Descriptor Addr Register BH */
+#define EDAL 0x88 /* Error Descriptor Addr Register L */
+#define EDAH 0x89 /* Error Descriptor Addr Register H */
+#define EDAB 0x8a /* Error Descriptor Addr Register B */
+#define EDABH 0x8b /* Error Descriptor Addr Register BH */
+#define BFLL 0x90 /* RX Buffer Length L (only RX) */
+#define BFLH 0x91 /* RX Buffer Length H (only RX) */
+#define BCRL 0x8c /* Byte Count Register L */
+#define BCRH 0x8d /* Byte Count Register H */
+
+/* Block Descriptor Structure */
+typedef struct {
+ unsigned long next; /* pointer to next block descriptor */
+ unsigned long ptbuf; /* buffer pointer */
+ unsigned short len; /* data length */
+ unsigned char status; /* status */
+ unsigned char filler[5]; /* alignment filler (16 bytes) */
+} pcsca_bd_t;
+
+/* Block Descriptor Structure */
+typedef struct {
+ u32 cp; /* pointer to next block descriptor */
+ u32 bp; /* buffer pointer */
+ u16 len; /* data length */
+ u8 stat; /* status */
+ u8 unused; /* pads to 4-byte boundary */
+}pkt_desc;
+
+
+/*
+ Descriptor Status definitions:
+
+ Bit Transmission Reception
+
+ 7 EOM EOM
+ 6 - Short Frame
+ 5 - Abort
+ 4 - Residual bit
+ 3 Underrun Overrun
+ 2 - CRC
+ 1 Ownership Ownership
+ 0 EOT -
+*/
+#define DST_EOT 0x01 /* End of transmit command */
+#define DST_OSB 0x02 /* Ownership bit */
+#define DST_CRC 0x04 /* CRC Error */
+#define DST_OVR 0x08 /* Overrun */
+#define DST_UDR 0x08 /* Underrun */
+#define DST_RBIT 0x10 /* Residual bit */
+#define DST_ABT 0x20 /* Abort */
+#define DST_SHRT 0x40 /* Short Frame */
+#define DST_EOM 0x80 /* End of Message */
+
+/* Packet Descriptor Status bits */
+
+#define ST_TX_EOM 0x80 /* End of frame */
+#define ST_TX_UNDRRUN 0x08
+#define ST_TX_OWNRSHP 0x02
+#define ST_TX_EOT 0x01 /* End of transmission */
+
+#define ST_RX_EOM 0x80 /* End of frame */
+#define ST_RX_SHORT 0x40 /* Short frame */
+#define ST_RX_ABORT 0x20 /* Abort */
+#define ST_RX_RESBIT 0x10 /* Residual bit */
+#define ST_RX_OVERRUN 0x08 /* Overrun */
+#define ST_RX_CRC 0x04 /* CRC */
+#define ST_RX_OWNRSHP 0x02
+
+#define ST_ERROR_MASK 0x7C
+
+/* Status Counter Registers */
+#define CMCR 0x158 /* Counter Master Ctl Reg */
+#define TECNTL 0x160 /* Tx EOM Counter L */
+#define TECNTM 0x161 /* Tx EOM Counter M */
+#define TECNTH 0x162 /* Tx EOM Counter H */
+#define TECCR 0x163 /* Tx EOM Counter Ctl Reg */
+#define URCNTL 0x164 /* Underrun Counter L */
+#define URCNTH 0x165 /* Underrun Counter H */
+#define URCCR 0x167 /* Underrun Counter Ctl Reg */
+#define RECNTL 0x168 /* Rx EOM Counter L */
+#define RECNTM 0x169 /* Rx EOM Counter M */
+#define RECNTH 0x16a /* Rx EOM Counter H */
+#define RECCR 0x16b /* Rx EOM Counter Ctl Reg */
+#define ORCNTL 0x16c /* Overrun Counter L */
+#define ORCNTH 0x16d /* Overrun Counter H */
+#define ORCCR 0x16f /* Overrun Counter Ctl Reg */
+#define CECNTL 0x170 /* CRC Counter L */
+#define CECNTH 0x171 /* CRC Counter H */
+#define CECCR 0x173 /* CRC Counter Ctl Reg */
+#define ABCNTL 0x174 /* Abort frame Counter L */
+#define ABCNTH 0x175 /* Abort frame Counter H */
+#define ABCCR 0x177 /* Abort frame Counter Ctl Reg */
+#define SHCNTL 0x178 /* Short frame Counter L */
+#define SHCNTH 0x179 /* Short frame Counter H */
+#define SHCCR 0x17b /* Short frame Counter Ctl Reg */
+#define RSCNTL 0x17c /* Residual bit Counter L */
+#define RSCNTH 0x17d /* Residual bit Counter H */
+#define RSCCR 0x17f /* Residual bit Counter Ctl Reg */
+
+/* Register Programming Constants */
+
+#define IR0_DMIC 0x00000001
+#define IR0_DMIB 0x00000002
+#define IR0_DMIA 0x00000004
+#define IR0_EFT 0x00000008
+#define IR0_DMAREQ 0x00010000
+#define IR0_TXINT 0x00020000
+#define IR0_RXINTB 0x00040000
+#define IR0_RXINTA 0x00080000
+#define IR0_TXRDY 0x00100000
+#define IR0_RXRDY 0x00200000
+
+#define MD0_CRC16_0 0x00
+#define MD0_CRC16_1 0x01
+#define MD0_CRC32 0x02
+#define MD0_CRC_CCITT 0x03
+#define MD0_CRCC0 0x04
+#define MD0_CRCC1 0x08
+#define MD0_AUTO_ENA 0x10
+#define MD0_ASYNC 0x00
+#define MD0_BY_MSYNC 0x20
+#define MD0_BY_BISYNC 0x40
+#define MD0_BY_EXT 0x60
+#define MD0_BIT_SYNC 0x80
+#define MD0_TRANSP 0xc0
+
+#define MD0_HDLC 0x80 /* Bit-sync HDLC mode */
+
+#define MD0_CRC_NONE 0x00
+#define MD0_CRC_16_0 0x04
+#define MD0_CRC_16 0x05
+#define MD0_CRC_ITU32 0x06
+#define MD0_CRC_ITU 0x07
+
+#define MD1_NOADDR 0x00
+#define MD1_SADDR1 0x40
+#define MD1_SADDR2 0x80
+#define MD1_DADDR 0xc0
+
+#define MD2_NRZI_IEEE 0x40
+#define MD2_MANCHESTER 0x80
+#define MD2_FM_MARK 0xA0
+#define MD2_FM_SPACE 0xC0
+#define MD2_LOOPBACK 0x03 /* Local data Loopback */
+
+#define MD2_F_DUPLEX 0x00
+#define MD2_AUTO_ECHO 0x01
+#define MD2_LOOP_HI_Z 0x02
+#define MD2_LOOP_MIR 0x03
+#define MD2_ADPLL_X8 0x00
+#define MD2_ADPLL_X16 0x08
+#define MD2_ADPLL_X32 0x10
+#define MD2_NRZ 0x00
+#define MD2_NRZI 0x20
+#define MD2_NRZ_IEEE 0x40
+#define MD2_MANCH 0x00
+#define MD2_FM1 0x20
+#define MD2_FM0 0x40
+#define MD2_FM 0x80
+
+#define CTL_RTS 0x01
+#define CTL_DTR 0x02
+#define CTL_SYN 0x04
+#define CTL_IDLC 0x10
+#define CTL_UDRNC 0x20
+#define CTL_URSKP 0x40
+#define CTL_URCT 0x80
+
+#define CTL_NORTS 0x01
+#define CTL_NODTR 0x02
+#define CTL_IDLE 0x10
+
+#define RXS_BR0 0x01
+#define RXS_BR1 0x02
+#define RXS_BR2 0x04
+#define RXS_BR3 0x08
+#define RXS_ECLK 0x00
+#define RXS_ECLK_NS 0x20
+#define RXS_IBRG 0x40
+#define RXS_PLL1 0x50
+#define RXS_PLL2 0x60
+#define RXS_PLL3 0x70
+#define RXS_DRTXC 0x80
+
+#define TXS_BR0 0x01
+#define TXS_BR1 0x02
+#define TXS_BR2 0x04
+#define TXS_BR3 0x08
+#define TXS_ECLK 0x00
+#define TXS_IBRG 0x40
+#define TXS_RCLK 0x60
+#define TXS_DTRXC 0x80
+
+#define EXS_RES0 0x01
+#define EXS_RES1 0x02
+#define EXS_RES2 0x04
+#define EXS_TES0 0x10
+#define EXS_TES1 0x20
+#define EXS_TES2 0x40
+
+#define CLK_BRG_MASK 0x0F
+#define CLK_PIN_OUT 0x80
+#define CLK_LINE 0x00 /* clock line input */
+#define CLK_BRG 0x40 /* internal baud rate generator */
+#define CLK_TX_RXCLK 0x60 /* TX clock from RX clock */
+
+#define CMD_RX_RST 0x11
+#define CMD_RX_ENA 0x12
+#define CMD_RX_DIS 0x13
+#define CMD_RX_CRC_INIT 0x14
+#define CMD_RX_MSG_REJ 0x15
+#define CMD_RX_MP_SRCH 0x16
+#define CMD_RX_CRC_EXC 0x17
+#define CMD_RX_CRC_FRC 0x18
+#define CMD_TX_RST 0x01
+#define CMD_TX_ENA 0x02
+#define CMD_TX_DISA 0x03
+#define CMD_TX_CRC_INIT 0x04
+#define CMD_TX_CRC_EXC 0x05
+#define CMD_TX_EOM 0x06
+#define CMD_TX_ABORT 0x07
+#define CMD_TX_MP_ON 0x08
+#define CMD_TX_BUF_CLR 0x09
+#define CMD_TX_DISB 0x0b
+#define CMD_CH_RST 0x21
+#define CMD_SRCH_MODE 0x31
+#define CMD_NOP 0x00
+
+#define CMD_RESET 0x21
+#define CMD_TX_ENABLE 0x02
+#define CMD_RX_ENABLE 0x12
+
+#define ST0_RXRDY 0x01
+#define ST0_TXRDY 0x02
+#define ST0_RXINTB 0x20
+#define ST0_RXINTA 0x40
+#define ST0_TXINT 0x80
+
+#define ST1_IDLE 0x01
+#define ST1_ABORT 0x02
+#define ST1_CDCD 0x04
+#define ST1_CCTS 0x08
+#define ST1_SYN_FLAG 0x10
+#define ST1_CLMD 0x20
+#define ST1_TXIDLE 0x40
+#define ST1_UDRN 0x80
+
+#define ST2_CRCE 0x04
+#define ST2_ONRN 0x08
+#define ST2_RBIT 0x10
+#define ST2_ABORT 0x20
+#define ST2_SHORT 0x40
+#define ST2_EOM 0x80
+
+#define ST3_RX_ENA 0x01
+#define ST3_TX_ENA 0x02
+#define ST3_DCD 0x04
+#define ST3_CTS 0x08
+#define ST3_SRCH_MODE 0x10
+#define ST3_SLOOP 0x20
+#define ST3_GPI 0x80
+
+#define ST4_RDNR 0x01
+#define ST4_RDCR 0x02
+#define ST4_TDNR 0x04
+#define ST4_TDCR 0x08
+#define ST4_OCLM 0x20
+#define ST4_CFT 0x40
+#define ST4_CGPI 0x80
+
+#define FST_CRCEF 0x04
+#define FST_OVRNF 0x08
+#define FST_RBIF 0x10
+#define FST_ABTF 0x20
+#define FST_SHRTF 0x40
+#define FST_EOMF 0x80
+
+#define IE0_RXRDY 0x01
+#define IE0_TXRDY 0x02
+#define IE0_RXINTB 0x20
+#define IE0_RXINTA 0x40
+#define IE0_TXINT 0x80
+#define IE0_UDRN 0x00008000 /* TX underrun MSCI interrupt enable */
+#define IE0_CDCD 0x00000400 /* CD level change interrupt enable */
+
+#define IE1_IDLD 0x01
+#define IE1_ABTD 0x02
+#define IE1_CDCD 0x04
+#define IE1_CCTS 0x08
+#define IE1_SYNCD 0x10
+#define IE1_CLMD 0x20
+#define IE1_IDL 0x40
+#define IE1_UDRN 0x80
+
+#define IE2_CRCE 0x04
+#define IE2_OVRN 0x08
+#define IE2_RBIT 0x10
+#define IE2_ABT 0x20
+#define IE2_SHRT 0x40
+#define IE2_EOM 0x80
+
+#define IE4_RDNR 0x01
+#define IE4_RDCR 0x02
+#define IE4_TDNR 0x04
+#define IE4_TDCR 0x08
+#define IE4_OCLM 0x20
+#define IE4_CFT 0x40
+#define IE4_CGPI 0x80
+
+#define FIE_CRCEF 0x04
+#define FIE_OVRNF 0x08
+#define FIE_RBIF 0x10
+#define FIE_ABTF 0x20
+#define FIE_SHRTF 0x40
+#define FIE_EOMF 0x80
+
+#define DSR_DWE 0x01
+#define DSR_DE 0x02
+#define DSR_REF 0x04
+#define DSR_UDRF 0x04
+#define DSR_COA 0x08
+#define DSR_COF 0x10
+#define DSR_BOF 0x20
+#define DSR_EOM 0x40
+#define DSR_EOT 0x80
+
+#define DIR_REF 0x04
+#define DIR_UDRF 0x04
+#define DIR_COA 0x08
+#define DIR_COF 0x10
+#define DIR_BOF 0x20
+#define DIR_EOM 0x40
+#define DIR_EOT 0x80
+
+#define DIR_REFE 0x04
+#define DIR_UDRFE 0x04
+#define DIR_COAE 0x08
+#define DIR_COFE 0x10
+#define DIR_BOFE 0x20
+#define DIR_EOME 0x40
+#define DIR_EOTE 0x80
+
+#define DMR_CNTE 0x02
+#define DMR_NF 0x04
+#define DMR_SEOME 0x08
+#define DMR_TMOD 0x10
+
+#define DMER_DME 0x80 /* DMA Master Enable */
+
+#define DCR_SW_ABT 0x01
+#define DCR_FCT_CLR 0x02
+
+#define DCR_ABORT 0x01
+#define DCR_CLEAR_EOF 0x02
+
+#define PCR_COTE 0x80
+#define PCR_PR0 0x01
+#define PCR_PR1 0x02
+#define PCR_PR2 0x04
+#define PCR_CCC 0x08
+#define PCR_BRC 0x10
+#define PCR_OSB 0x40
+#define PCR_BURST 0x80
+
+#endif /* (__HD64572_H) */
diff --git a/drivers/net/wan/hdlc.c b/drivers/net/wan/hdlc.c
new file mode 100644
index 000000000..cbed10b1d
--- /dev/null
+++ b/drivers/net/wan/hdlc.c
@@ -0,0 +1,379 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Generic HDLC support routines for Linux
+ *
+ * Copyright (C) 1999 - 2008 Krzysztof Halasa <khc@pm.waw.pl>
+ *
+ * Currently supported:
+ * * raw IP-in-HDLC
+ * * Cisco HDLC
+ * * Frame Relay with ANSI or CCITT LMI (both user and network side)
+ * * PPP
+ * * X.25
+ *
+ * Use sethdlc utility to set line parameters, protocol and PVCs
+ *
+ * How does it work:
+ * - proto->open(), close(), start(), stop() calls are serialized.
+ * The order is: open, [ start, stop ... ] close ...
+ * - proto->start() and stop() are called with spin_lock_irq held.
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/errno.h>
+#include <linux/hdlc.h>
+#include <linux/if_arp.h>
+#include <linux/inetdevice.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/notifier.h>
+#include <linux/pkt_sched.h>
+#include <linux/poll.h>
+#include <linux/rtnetlink.h>
+#include <linux/skbuff.h>
+#include <linux/slab.h>
+#include <net/net_namespace.h>
+
+static const char *version = "HDLC support module revision 1.22";
+
+#undef DEBUG_LINK
+
+static struct hdlc_proto *first_proto;
+
+static int hdlc_rcv(struct sk_buff *skb, struct net_device *dev,
+ struct packet_type *p, struct net_device *orig_dev)
+{
+ struct hdlc_device *hdlc;
+
+ /* First make sure "dev" is an HDLC device */
+ if (!(dev->priv_flags & IFF_WAN_HDLC)) {
+ kfree_skb(skb);
+ return NET_RX_SUCCESS;
+ }
+
+ hdlc = dev_to_hdlc(dev);
+
+ if (!net_eq(dev_net(dev), &init_net)) {
+ kfree_skb(skb);
+ return 0;
+ }
+
+ BUG_ON(!hdlc->proto->netif_rx);
+ return hdlc->proto->netif_rx(skb);
+}
+
+netdev_tx_t hdlc_start_xmit(struct sk_buff *skb, struct net_device *dev)
+{
+ hdlc_device *hdlc = dev_to_hdlc(dev);
+
+ if (hdlc->proto->xmit)
+ return hdlc->proto->xmit(skb, dev);
+
+ return hdlc->xmit(skb, dev); /* call hardware driver directly */
+}
+EXPORT_SYMBOL(hdlc_start_xmit);
+
+static inline void hdlc_proto_start(struct net_device *dev)
+{
+ hdlc_device *hdlc = dev_to_hdlc(dev);
+
+ if (hdlc->proto->start)
+ hdlc->proto->start(dev);
+}
+
+static inline void hdlc_proto_stop(struct net_device *dev)
+{
+ hdlc_device *hdlc = dev_to_hdlc(dev);
+
+ if (hdlc->proto->stop)
+ hdlc->proto->stop(dev);
+}
+
+static int hdlc_device_event(struct notifier_block *this, unsigned long event,
+ void *ptr)
+{
+ struct net_device *dev = netdev_notifier_info_to_dev(ptr);
+ hdlc_device *hdlc;
+ unsigned long flags;
+ int on;
+
+ if (!net_eq(dev_net(dev), &init_net))
+ return NOTIFY_DONE;
+
+ if (!(dev->priv_flags & IFF_WAN_HDLC))
+ return NOTIFY_DONE; /* not an HDLC device */
+
+ if (event != NETDEV_CHANGE)
+ return NOTIFY_DONE; /* Only interested in carrier changes */
+
+ on = netif_carrier_ok(dev);
+
+#ifdef DEBUG_LINK
+ printk(KERN_DEBUG "%s: hdlc_device_event NETDEV_CHANGE, carrier %i\n",
+ dev->name, on);
+#endif
+
+ hdlc = dev_to_hdlc(dev);
+ spin_lock_irqsave(&hdlc->state_lock, flags);
+
+ if (hdlc->carrier == on)
+ goto carrier_exit; /* no change in DCD line level */
+
+ hdlc->carrier = on;
+
+ if (!hdlc->open)
+ goto carrier_exit;
+
+ if (hdlc->carrier) {
+ netdev_info(dev, "Carrier detected\n");
+ hdlc_proto_start(dev);
+ } else {
+ netdev_info(dev, "Carrier lost\n");
+ hdlc_proto_stop(dev);
+ }
+
+carrier_exit:
+ spin_unlock_irqrestore(&hdlc->state_lock, flags);
+ return NOTIFY_DONE;
+}
+
+/* Must be called by hardware driver when HDLC device is being opened */
+int hdlc_open(struct net_device *dev)
+{
+ hdlc_device *hdlc = dev_to_hdlc(dev);
+#ifdef DEBUG_LINK
+ printk(KERN_DEBUG "%s: hdlc_open() carrier %i open %i\n", dev->name,
+ hdlc->carrier, hdlc->open);
+#endif
+
+ if (!hdlc->proto)
+ return -ENOSYS; /* no protocol attached */
+
+ if (hdlc->proto->open) {
+ int result = hdlc->proto->open(dev);
+
+ if (result)
+ return result;
+ }
+
+ spin_lock_irq(&hdlc->state_lock);
+
+ if (hdlc->carrier) {
+ netdev_info(dev, "Carrier detected\n");
+ hdlc_proto_start(dev);
+ } else {
+ netdev_info(dev, "No carrier\n");
+ }
+
+ hdlc->open = 1;
+
+ spin_unlock_irq(&hdlc->state_lock);
+ return 0;
+}
+EXPORT_SYMBOL(hdlc_open);
+
+/* Must be called by hardware driver when HDLC device is being closed */
+void hdlc_close(struct net_device *dev)
+{
+ hdlc_device *hdlc = dev_to_hdlc(dev);
+#ifdef DEBUG_LINK
+ printk(KERN_DEBUG "%s: hdlc_close() carrier %i open %i\n", dev->name,
+ hdlc->carrier, hdlc->open);
+#endif
+
+ spin_lock_irq(&hdlc->state_lock);
+
+ hdlc->open = 0;
+ if (hdlc->carrier)
+ hdlc_proto_stop(dev);
+
+ spin_unlock_irq(&hdlc->state_lock);
+
+ if (hdlc->proto->close)
+ hdlc->proto->close(dev);
+}
+EXPORT_SYMBOL(hdlc_close);
+
+int hdlc_ioctl(struct net_device *dev, struct if_settings *ifs)
+{
+ struct hdlc_proto *proto = first_proto;
+ int result;
+
+ if (dev_to_hdlc(dev)->proto) {
+ result = dev_to_hdlc(dev)->proto->ioctl(dev, ifs);
+ if (result != -EINVAL)
+ return result;
+ }
+
+ /* Not handled by currently attached protocol (if any) */
+
+ while (proto) {
+ result = proto->ioctl(dev, ifs);
+ if (result != -EINVAL)
+ return result;
+ proto = proto->next;
+ }
+ return -EINVAL;
+}
+EXPORT_SYMBOL(hdlc_ioctl);
+
+static const struct header_ops hdlc_null_ops;
+
+static void hdlc_setup_dev(struct net_device *dev)
+{
+ /* Re-init all variables changed by HDLC protocol drivers,
+ * including ether_setup() called from hdlc_raw_eth.c.
+ */
+ dev->flags = IFF_POINTOPOINT | IFF_NOARP;
+ dev->priv_flags = IFF_WAN_HDLC;
+ dev->mtu = HDLC_MAX_MTU;
+ dev->min_mtu = 68;
+ dev->max_mtu = HDLC_MAX_MTU;
+ dev->type = ARPHRD_RAWHDLC;
+ dev->hard_header_len = 0;
+ dev->needed_headroom = 0;
+ dev->addr_len = 0;
+ dev->header_ops = &hdlc_null_ops;
+}
+
+static void hdlc_setup(struct net_device *dev)
+{
+ hdlc_device *hdlc = dev_to_hdlc(dev);
+
+ hdlc_setup_dev(dev);
+ hdlc->carrier = 1;
+ hdlc->open = 0;
+ spin_lock_init(&hdlc->state_lock);
+}
+
+struct net_device *alloc_hdlcdev(void *priv)
+{
+ struct net_device *dev;
+
+ dev = alloc_netdev(sizeof(struct hdlc_device), "hdlc%d",
+ NET_NAME_UNKNOWN, hdlc_setup);
+ if (dev)
+ dev_to_hdlc(dev)->priv = priv;
+ return dev;
+}
+EXPORT_SYMBOL(alloc_hdlcdev);
+
+void unregister_hdlc_device(struct net_device *dev)
+{
+ rtnl_lock();
+ detach_hdlc_protocol(dev);
+ unregister_netdevice(dev);
+ rtnl_unlock();
+}
+EXPORT_SYMBOL(unregister_hdlc_device);
+
+int attach_hdlc_protocol(struct net_device *dev, struct hdlc_proto *proto,
+ size_t size)
+{
+ int err;
+
+ err = detach_hdlc_protocol(dev);
+ if (err)
+ return err;
+
+ if (!try_module_get(proto->module))
+ return -ENOSYS;
+
+ if (size) {
+ dev_to_hdlc(dev)->state = kmalloc(size, GFP_KERNEL);
+ if (!dev_to_hdlc(dev)->state) {
+ module_put(proto->module);
+ return -ENOBUFS;
+ }
+ }
+ dev_to_hdlc(dev)->proto = proto;
+
+ return 0;
+}
+EXPORT_SYMBOL(attach_hdlc_protocol);
+
+int detach_hdlc_protocol(struct net_device *dev)
+{
+ hdlc_device *hdlc = dev_to_hdlc(dev);
+ int err;
+
+ if (hdlc->proto) {
+ err = call_netdevice_notifiers(NETDEV_PRE_TYPE_CHANGE, dev);
+ err = notifier_to_errno(err);
+ if (err) {
+ netdev_err(dev, "Refused to change device type\n");
+ return err;
+ }
+
+ if (hdlc->proto->detach)
+ hdlc->proto->detach(dev);
+ module_put(hdlc->proto->module);
+ hdlc->proto = NULL;
+ }
+ kfree(hdlc->state);
+ hdlc->state = NULL;
+ hdlc_setup_dev(dev);
+
+ return 0;
+}
+EXPORT_SYMBOL(detach_hdlc_protocol);
+
+void register_hdlc_protocol(struct hdlc_proto *proto)
+{
+ rtnl_lock();
+ proto->next = first_proto;
+ first_proto = proto;
+ rtnl_unlock();
+}
+EXPORT_SYMBOL(register_hdlc_protocol);
+
+void unregister_hdlc_protocol(struct hdlc_proto *proto)
+{
+ struct hdlc_proto **p;
+
+ rtnl_lock();
+ p = &first_proto;
+ while (*p != proto) {
+ BUG_ON(!*p);
+ p = &((*p)->next);
+ }
+ *p = proto->next;
+ rtnl_unlock();
+}
+EXPORT_SYMBOL(unregister_hdlc_protocol);
+
+MODULE_AUTHOR("Krzysztof Halasa <khc@pm.waw.pl>");
+MODULE_DESCRIPTION("HDLC support module");
+MODULE_LICENSE("GPL v2");
+
+static struct packet_type hdlc_packet_type __read_mostly = {
+ .type = cpu_to_be16(ETH_P_HDLC),
+ .func = hdlc_rcv,
+};
+
+static struct notifier_block hdlc_notifier = {
+ .notifier_call = hdlc_device_event,
+};
+
+static int __init hdlc_module_init(void)
+{
+ int result;
+
+ pr_info("%s\n", version);
+ result = register_netdevice_notifier(&hdlc_notifier);
+ if (result)
+ return result;
+ dev_add_pack(&hdlc_packet_type);
+ return 0;
+}
+
+static void __exit hdlc_module_exit(void)
+{
+ dev_remove_pack(&hdlc_packet_type);
+ unregister_netdevice_notifier(&hdlc_notifier);
+}
+
+module_init(hdlc_module_init);
+module_exit(hdlc_module_exit);
diff --git a/drivers/net/wan/hdlc_cisco.c b/drivers/net/wan/hdlc_cisco.c
new file mode 100644
index 000000000..cdebe65a7
--- /dev/null
+++ b/drivers/net/wan/hdlc_cisco.c
@@ -0,0 +1,383 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Generic HDLC support routines for Linux
+ * Cisco HDLC support
+ *
+ * Copyright (C) 2000 - 2006 Krzysztof Halasa <khc@pm.waw.pl>
+ */
+
+#include <linux/errno.h>
+#include <linux/hdlc.h>
+#include <linux/if_arp.h>
+#include <linux/inetdevice.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/pkt_sched.h>
+#include <linux/poll.h>
+#include <linux/rtnetlink.h>
+#include <linux/skbuff.h>
+
+#undef DEBUG_HARD_HEADER
+
+#define CISCO_MULTICAST 0x8F /* Cisco multicast address */
+#define CISCO_UNICAST 0x0F /* Cisco unicast address */
+#define CISCO_KEEPALIVE 0x8035 /* Cisco keepalive protocol */
+#define CISCO_SYS_INFO 0x2000 /* Cisco interface/system info */
+#define CISCO_ADDR_REQ 0 /* Cisco address request */
+#define CISCO_ADDR_REPLY 1 /* Cisco address reply */
+#define CISCO_KEEPALIVE_REQ 2 /* Cisco keepalive request */
+
+struct hdlc_header {
+ u8 address;
+ u8 control;
+ __be16 protocol;
+} __packed;
+
+struct cisco_packet {
+ __be32 type; /* code */
+ __be32 par1;
+ __be32 par2;
+ __be16 rel; /* reliability */
+ __be32 time;
+} __packed;
+#define CISCO_PACKET_LEN 18
+#define CISCO_BIG_PACKET_LEN 20
+
+struct cisco_state {
+ cisco_proto settings;
+
+ struct timer_list timer;
+ struct net_device *dev;
+ spinlock_t lock;
+ unsigned long last_poll;
+ int up;
+ u32 txseq; /* TX sequence number, 0 = none */
+ u32 rxseq; /* RX sequence number */
+};
+
+static int cisco_ioctl(struct net_device *dev, struct if_settings *ifs);
+
+static inline struct cisco_state *state(hdlc_device *hdlc)
+{
+ return (struct cisco_state *)hdlc->state;
+}
+
+static int cisco_hard_header(struct sk_buff *skb, struct net_device *dev,
+ u16 type, const void *daddr, const void *saddr,
+ unsigned int len)
+{
+ struct hdlc_header *data;
+#ifdef DEBUG_HARD_HEADER
+ netdev_dbg(dev, "%s called\n", __func__);
+#endif
+
+ skb_push(skb, sizeof(struct hdlc_header));
+ data = (struct hdlc_header *)skb->data;
+ if (type == CISCO_KEEPALIVE)
+ data->address = CISCO_MULTICAST;
+ else
+ data->address = CISCO_UNICAST;
+ data->control = 0;
+ data->protocol = htons(type);
+
+ return sizeof(struct hdlc_header);
+}
+
+static void cisco_keepalive_send(struct net_device *dev, u32 type,
+ __be32 par1, __be32 par2)
+{
+ struct sk_buff *skb;
+ struct cisco_packet *data;
+
+ skb = dev_alloc_skb(sizeof(struct hdlc_header) +
+ sizeof(struct cisco_packet));
+ if (!skb)
+ return;
+
+ skb_reserve(skb, 4);
+ cisco_hard_header(skb, dev, CISCO_KEEPALIVE, NULL, NULL, 0);
+ data = (struct cisco_packet *)(skb->data + 4);
+
+ data->type = htonl(type);
+ data->par1 = par1;
+ data->par2 = par2;
+ data->rel = cpu_to_be16(0xFFFF);
+ /* we will need do_div here if 1000 % HZ != 0 */
+ data->time = htonl((jiffies - INITIAL_JIFFIES) * (1000 / HZ));
+
+ skb_put(skb, sizeof(struct cisco_packet));
+ skb->priority = TC_PRIO_CONTROL;
+ skb->dev = dev;
+ skb->protocol = htons(ETH_P_HDLC);
+ skb_reset_network_header(skb);
+
+ dev_queue_xmit(skb);
+}
+
+static __be16 cisco_type_trans(struct sk_buff *skb, struct net_device *dev)
+{
+ struct hdlc_header *data = (struct hdlc_header *)skb->data;
+
+ if (skb->len < sizeof(struct hdlc_header))
+ return cpu_to_be16(ETH_P_HDLC);
+
+ if (data->address != CISCO_MULTICAST &&
+ data->address != CISCO_UNICAST)
+ return cpu_to_be16(ETH_P_HDLC);
+
+ switch (data->protocol) {
+ case cpu_to_be16(ETH_P_IP):
+ case cpu_to_be16(ETH_P_IPX):
+ case cpu_to_be16(ETH_P_IPV6):
+ skb_pull(skb, sizeof(struct hdlc_header));
+ return data->protocol;
+ default:
+ return cpu_to_be16(ETH_P_HDLC);
+ }
+}
+
+static int cisco_rx(struct sk_buff *skb)
+{
+ struct net_device *dev = skb->dev;
+ hdlc_device *hdlc = dev_to_hdlc(dev);
+ struct cisco_state *st = state(hdlc);
+ struct hdlc_header *data = (struct hdlc_header *)skb->data;
+ struct cisco_packet *cisco_data;
+ struct in_device *in_dev;
+ __be32 addr, mask;
+ u32 ack;
+
+ if (skb->len < sizeof(struct hdlc_header))
+ goto rx_error;
+
+ if (data->address != CISCO_MULTICAST &&
+ data->address != CISCO_UNICAST)
+ goto rx_error;
+
+ switch (ntohs(data->protocol)) {
+ case CISCO_SYS_INFO:
+ /* Packet is not needed, drop it. */
+ dev_kfree_skb_any(skb);
+ return NET_RX_SUCCESS;
+
+ case CISCO_KEEPALIVE:
+ if ((skb->len != sizeof(struct hdlc_header) +
+ CISCO_PACKET_LEN) &&
+ (skb->len != sizeof(struct hdlc_header) +
+ CISCO_BIG_PACKET_LEN)) {
+ netdev_info(dev, "Invalid length of Cisco control packet (%d bytes)\n",
+ skb->len);
+ goto rx_error;
+ }
+
+ cisco_data = (struct cisco_packet *)(skb->data + sizeof
+ (struct hdlc_header));
+
+ switch (ntohl(cisco_data->type)) {
+ case CISCO_ADDR_REQ: /* Stolen from syncppp.c :-) */
+ rcu_read_lock();
+ in_dev = __in_dev_get_rcu(dev);
+ addr = 0;
+ mask = ~cpu_to_be32(0); /* is the mask correct? */
+
+ if (in_dev != NULL) {
+ const struct in_ifaddr *ifa;
+
+ in_dev_for_each_ifa_rcu(ifa, in_dev) {
+ if (strcmp(dev->name,
+ ifa->ifa_label) == 0) {
+ addr = ifa->ifa_local;
+ mask = ifa->ifa_mask;
+ break;
+ }
+ }
+
+ cisco_keepalive_send(dev, CISCO_ADDR_REPLY,
+ addr, mask);
+ }
+ rcu_read_unlock();
+ dev_kfree_skb_any(skb);
+ return NET_RX_SUCCESS;
+
+ case CISCO_ADDR_REPLY:
+ netdev_info(dev, "Unexpected Cisco IP address reply\n");
+ goto rx_error;
+
+ case CISCO_KEEPALIVE_REQ:
+ spin_lock(&st->lock);
+ st->rxseq = ntohl(cisco_data->par1);
+ ack = ntohl(cisco_data->par2);
+ if (ack && (ack == st->txseq ||
+ /* our current REQ may be in transit */
+ ack == st->txseq - 1)) {
+ st->last_poll = jiffies;
+ if (!st->up) {
+ u32 sec, min, hrs, days;
+
+ sec = ntohl(cisco_data->time) / 1000;
+ min = sec / 60; sec -= min * 60;
+ hrs = min / 60; min -= hrs * 60;
+ days = hrs / 24; hrs -= days * 24;
+ netdev_info(dev, "Link up (peer uptime %ud%uh%um%us)\n",
+ days, hrs, min, sec);
+ netif_dormant_off(dev);
+ st->up = 1;
+ }
+ }
+ spin_unlock(&st->lock);
+
+ dev_kfree_skb_any(skb);
+ return NET_RX_SUCCESS;
+ } /* switch (keepalive type) */
+ } /* switch (protocol) */
+
+ netdev_info(dev, "Unsupported protocol %x\n", ntohs(data->protocol));
+ dev_kfree_skb_any(skb);
+ return NET_RX_DROP;
+
+rx_error:
+ dev->stats.rx_errors++; /* Mark error */
+ dev_kfree_skb_any(skb);
+ return NET_RX_DROP;
+}
+
+static void cisco_timer(struct timer_list *t)
+{
+ struct cisco_state *st = from_timer(st, t, timer);
+ struct net_device *dev = st->dev;
+
+ spin_lock(&st->lock);
+ if (st->up &&
+ time_after(jiffies, st->last_poll + st->settings.timeout * HZ)) {
+ st->up = 0;
+ netdev_info(dev, "Link down\n");
+ netif_dormant_on(dev);
+ }
+
+ cisco_keepalive_send(dev, CISCO_KEEPALIVE_REQ, htonl(++st->txseq),
+ htonl(st->rxseq));
+ spin_unlock(&st->lock);
+
+ st->timer.expires = jiffies + st->settings.interval * HZ;
+ add_timer(&st->timer);
+}
+
+static void cisco_start(struct net_device *dev)
+{
+ hdlc_device *hdlc = dev_to_hdlc(dev);
+ struct cisco_state *st = state(hdlc);
+ unsigned long flags;
+
+ spin_lock_irqsave(&st->lock, flags);
+ st->up = st->txseq = st->rxseq = 0;
+ spin_unlock_irqrestore(&st->lock, flags);
+
+ st->dev = dev;
+ timer_setup(&st->timer, cisco_timer, 0);
+ st->timer.expires = jiffies + HZ; /* First poll after 1 s */
+ add_timer(&st->timer);
+}
+
+static void cisco_stop(struct net_device *dev)
+{
+ hdlc_device *hdlc = dev_to_hdlc(dev);
+ struct cisco_state *st = state(hdlc);
+ unsigned long flags;
+
+ del_timer_sync(&st->timer);
+
+ spin_lock_irqsave(&st->lock, flags);
+ netif_dormant_on(dev);
+ st->up = st->txseq = 0;
+ spin_unlock_irqrestore(&st->lock, flags);
+}
+
+static struct hdlc_proto proto = {
+ .start = cisco_start,
+ .stop = cisco_stop,
+ .type_trans = cisco_type_trans,
+ .ioctl = cisco_ioctl,
+ .netif_rx = cisco_rx,
+ .module = THIS_MODULE,
+};
+
+static const struct header_ops cisco_header_ops = {
+ .create = cisco_hard_header,
+};
+
+static int cisco_ioctl(struct net_device *dev, struct if_settings *ifs)
+{
+ cisco_proto __user *cisco_s = ifs->ifs_ifsu.cisco;
+ const size_t size = sizeof(cisco_proto);
+ cisco_proto new_settings;
+ hdlc_device *hdlc = dev_to_hdlc(dev);
+ int result;
+
+ switch (ifs->type) {
+ case IF_GET_PROTO:
+ if (dev_to_hdlc(dev)->proto != &proto)
+ return -EINVAL;
+ ifs->type = IF_PROTO_CISCO;
+ if (ifs->size < size) {
+ ifs->size = size; /* data size wanted */
+ return -ENOBUFS;
+ }
+ if (copy_to_user(cisco_s, &state(hdlc)->settings, size))
+ return -EFAULT;
+ return 0;
+
+ case IF_PROTO_CISCO:
+ if (!capable(CAP_NET_ADMIN))
+ return -EPERM;
+
+ if (dev->flags & IFF_UP)
+ return -EBUSY;
+
+ if (copy_from_user(&new_settings, cisco_s, size))
+ return -EFAULT;
+
+ if (new_settings.interval < 1 ||
+ new_settings.timeout < 2)
+ return -EINVAL;
+
+ result = hdlc->attach(dev, ENCODING_NRZ,
+ PARITY_CRC16_PR1_CCITT);
+ if (result)
+ return result;
+
+ result = attach_hdlc_protocol(dev, &proto,
+ sizeof(struct cisco_state));
+ if (result)
+ return result;
+
+ memcpy(&state(hdlc)->settings, &new_settings, size);
+ spin_lock_init(&state(hdlc)->lock);
+ dev->header_ops = &cisco_header_ops;
+ dev->hard_header_len = sizeof(struct hdlc_header);
+ dev->type = ARPHRD_CISCO;
+ call_netdevice_notifiers(NETDEV_POST_TYPE_CHANGE, dev);
+ netif_dormant_on(dev);
+ return 0;
+ }
+
+ return -EINVAL;
+}
+
+static int __init hdlc_cisco_init(void)
+{
+ register_hdlc_protocol(&proto);
+ return 0;
+}
+
+static void __exit hdlc_cisco_exit(void)
+{
+ unregister_hdlc_protocol(&proto);
+}
+
+module_init(hdlc_cisco_init);
+module_exit(hdlc_cisco_exit);
+
+MODULE_AUTHOR("Krzysztof Halasa <khc@pm.waw.pl>");
+MODULE_DESCRIPTION("Cisco HDLC protocol support for generic HDLC");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/net/wan/hdlc_fr.c b/drivers/net/wan/hdlc_fr.c
new file mode 100644
index 000000000..81e72bc18
--- /dev/null
+++ b/drivers/net/wan/hdlc_fr.c
@@ -0,0 +1,1300 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Generic HDLC support routines for Linux
+ * Frame Relay support
+ *
+ * Copyright (C) 1999 - 2006 Krzysztof Halasa <khc@pm.waw.pl>
+ *
+
+ Theory of PVC state
+
+ DCE mode:
+
+ (exist,new) -> 0,0 when "PVC create" or if "link unreliable"
+ 0,x -> 1,1 if "link reliable" when sending FULL STATUS
+ 1,1 -> 1,0 if received FULL STATUS ACK
+
+ (active) -> 0 when "ifconfig PVC down" or "link unreliable" or "PVC create"
+ -> 1 when "PVC up" and (exist,new) = 1,0
+
+ DTE mode:
+ (exist,new,active) = FULL STATUS if "link reliable"
+ = 0, 0, 0 if "link unreliable"
+ No LMI:
+ active = open and "link reliable"
+ exist = new = not used
+
+ CCITT LMI: ITU-T Q.933 Annex A
+ ANSI LMI: ANSI T1.617 Annex D
+ CISCO LMI: the original, aka "Gang of Four" LMI
+
+*/
+
+#include <linux/errno.h>
+#include <linux/etherdevice.h>
+#include <linux/hdlc.h>
+#include <linux/if_arp.h>
+#include <linux/inetdevice.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/pkt_sched.h>
+#include <linux/poll.h>
+#include <linux/rtnetlink.h>
+#include <linux/skbuff.h>
+#include <linux/slab.h>
+
+#undef DEBUG_PKT
+#undef DEBUG_ECN
+#undef DEBUG_LINK
+#undef DEBUG_PROTO
+#undef DEBUG_PVC
+
+#define FR_UI 0x03
+#define FR_PAD 0x00
+
+#define NLPID_IP 0xCC
+#define NLPID_IPV6 0x8E
+#define NLPID_SNAP 0x80
+#define NLPID_PAD 0x00
+#define NLPID_CCITT_ANSI_LMI 0x08
+#define NLPID_CISCO_LMI 0x09
+
+#define LMI_CCITT_ANSI_DLCI 0 /* LMI DLCI */
+#define LMI_CISCO_DLCI 1023
+
+#define LMI_CALLREF 0x00 /* Call Reference */
+#define LMI_ANSI_LOCKSHIFT 0x95 /* ANSI locking shift */
+#define LMI_ANSI_CISCO_REPTYPE 0x01 /* report type */
+#define LMI_CCITT_REPTYPE 0x51
+#define LMI_ANSI_CISCO_ALIVE 0x03 /* keep alive */
+#define LMI_CCITT_ALIVE 0x53
+#define LMI_ANSI_CISCO_PVCSTAT 0x07 /* PVC status */
+#define LMI_CCITT_PVCSTAT 0x57
+
+#define LMI_FULLREP 0x00 /* full report */
+#define LMI_INTEGRITY 0x01 /* link integrity report */
+#define LMI_SINGLE 0x02 /* single PVC report */
+
+#define LMI_STATUS_ENQUIRY 0x75
+#define LMI_STATUS 0x7D /* reply */
+
+#define LMI_REPT_LEN 1 /* report type element length */
+#define LMI_INTEG_LEN 2 /* link integrity element length */
+
+#define LMI_CCITT_CISCO_LENGTH 13 /* LMI frame lengths */
+#define LMI_ANSI_LENGTH 14
+
+struct fr_hdr {
+#if defined(__LITTLE_ENDIAN_BITFIELD)
+ unsigned ea1: 1;
+ unsigned cr: 1;
+ unsigned dlcih: 6;
+
+ unsigned ea2: 1;
+ unsigned de: 1;
+ unsigned becn: 1;
+ unsigned fecn: 1;
+ unsigned dlcil: 4;
+#else
+ unsigned dlcih: 6;
+ unsigned cr: 1;
+ unsigned ea1: 1;
+
+ unsigned dlcil: 4;
+ unsigned fecn: 1;
+ unsigned becn: 1;
+ unsigned de: 1;
+ unsigned ea2: 1;
+#endif
+} __packed;
+
+struct pvc_device {
+ struct net_device *frad;
+ struct net_device *main;
+ struct net_device *ether; /* bridged Ethernet interface */
+ struct pvc_device *next; /* Sorted in ascending DLCI order */
+ int dlci;
+ int open_count;
+
+ struct {
+ unsigned int new: 1;
+ unsigned int active: 1;
+ unsigned int exist: 1;
+ unsigned int deleted: 1;
+ unsigned int fecn: 1;
+ unsigned int becn: 1;
+ unsigned int bandwidth; /* Cisco LMI reporting only */
+ } state;
+};
+
+struct frad_state {
+ fr_proto settings;
+ struct pvc_device *first_pvc;
+ int dce_pvc_count;
+
+ struct timer_list timer;
+ struct net_device *dev;
+ unsigned long last_poll;
+ int reliable;
+ int dce_changed;
+ int request;
+ int fullrep_sent;
+ u32 last_errors; /* last errors bit list */
+ u8 n391cnt;
+ u8 txseq; /* TX sequence number */
+ u8 rxseq; /* RX sequence number */
+};
+
+static int fr_ioctl(struct net_device *dev, struct if_settings *ifs);
+
+static inline u16 q922_to_dlci(u8 *hdr)
+{
+ return ((hdr[0] & 0xFC) << 2) | ((hdr[1] & 0xF0) >> 4);
+}
+
+static inline void dlci_to_q922(u8 *hdr, u16 dlci)
+{
+ hdr[0] = (dlci >> 2) & 0xFC;
+ hdr[1] = ((dlci << 4) & 0xF0) | 0x01;
+}
+
+static inline struct frad_state *state(hdlc_device *hdlc)
+{
+ return (struct frad_state *)(hdlc->state);
+}
+
+static inline struct pvc_device *find_pvc(hdlc_device *hdlc, u16 dlci)
+{
+ struct pvc_device *pvc = state(hdlc)->first_pvc;
+
+ while (pvc) {
+ if (pvc->dlci == dlci)
+ return pvc;
+ if (pvc->dlci > dlci)
+ return NULL; /* the list is sorted */
+ pvc = pvc->next;
+ }
+
+ return NULL;
+}
+
+static struct pvc_device *add_pvc(struct net_device *dev, u16 dlci)
+{
+ hdlc_device *hdlc = dev_to_hdlc(dev);
+ struct pvc_device *pvc, **pvc_p = &state(hdlc)->first_pvc;
+
+ while (*pvc_p) {
+ if ((*pvc_p)->dlci == dlci)
+ return *pvc_p;
+ if ((*pvc_p)->dlci > dlci)
+ break; /* the list is sorted */
+ pvc_p = &(*pvc_p)->next;
+ }
+
+ pvc = kzalloc(sizeof(*pvc), GFP_ATOMIC);
+#ifdef DEBUG_PVC
+ printk(KERN_DEBUG "add_pvc: allocated pvc %p, frad %p\n", pvc, dev);
+#endif
+ if (!pvc)
+ return NULL;
+
+ pvc->dlci = dlci;
+ pvc->frad = dev;
+ pvc->next = *pvc_p; /* Put it in the chain */
+ *pvc_p = pvc;
+ return pvc;
+}
+
+static inline int pvc_is_used(struct pvc_device *pvc)
+{
+ return pvc->main || pvc->ether;
+}
+
+static inline void pvc_carrier(int on, struct pvc_device *pvc)
+{
+ if (on) {
+ if (pvc->main)
+ if (!netif_carrier_ok(pvc->main))
+ netif_carrier_on(pvc->main);
+ if (pvc->ether)
+ if (!netif_carrier_ok(pvc->ether))
+ netif_carrier_on(pvc->ether);
+ } else {
+ if (pvc->main)
+ if (netif_carrier_ok(pvc->main))
+ netif_carrier_off(pvc->main);
+ if (pvc->ether)
+ if (netif_carrier_ok(pvc->ether))
+ netif_carrier_off(pvc->ether);
+ }
+}
+
+static inline void delete_unused_pvcs(hdlc_device *hdlc)
+{
+ struct pvc_device **pvc_p = &state(hdlc)->first_pvc;
+
+ while (*pvc_p) {
+ if (!pvc_is_used(*pvc_p)) {
+ struct pvc_device *pvc = *pvc_p;
+#ifdef DEBUG_PVC
+ printk(KERN_DEBUG "freeing unused pvc: %p\n", pvc);
+#endif
+ *pvc_p = pvc->next;
+ kfree(pvc);
+ continue;
+ }
+ pvc_p = &(*pvc_p)->next;
+ }
+}
+
+static inline struct net_device **get_dev_p(struct pvc_device *pvc,
+ int type)
+{
+ if (type == ARPHRD_ETHER)
+ return &pvc->ether;
+ else
+ return &pvc->main;
+}
+
+static int fr_hard_header(struct sk_buff *skb, u16 dlci)
+{
+ if (!skb->dev) { /* Control packets */
+ switch (dlci) {
+ case LMI_CCITT_ANSI_DLCI:
+ skb_push(skb, 4);
+ skb->data[3] = NLPID_CCITT_ANSI_LMI;
+ break;
+
+ case LMI_CISCO_DLCI:
+ skb_push(skb, 4);
+ skb->data[3] = NLPID_CISCO_LMI;
+ break;
+
+ default:
+ return -EINVAL;
+ }
+
+ } else if (skb->dev->type == ARPHRD_DLCI) {
+ switch (skb->protocol) {
+ case htons(ETH_P_IP):
+ skb_push(skb, 4);
+ skb->data[3] = NLPID_IP;
+ break;
+
+ case htons(ETH_P_IPV6):
+ skb_push(skb, 4);
+ skb->data[3] = NLPID_IPV6;
+ break;
+
+ default:
+ skb_push(skb, 10);
+ skb->data[3] = FR_PAD;
+ skb->data[4] = NLPID_SNAP;
+ /* OUI 00-00-00 indicates an Ethertype follows */
+ skb->data[5] = 0x00;
+ skb->data[6] = 0x00;
+ skb->data[7] = 0x00;
+ /* This should be an Ethertype: */
+ *(__be16 *)(skb->data + 8) = skb->protocol;
+ }
+
+ } else if (skb->dev->type == ARPHRD_ETHER) {
+ skb_push(skb, 10);
+ skb->data[3] = FR_PAD;
+ skb->data[4] = NLPID_SNAP;
+ /* OUI 00-80-C2 stands for the 802.1 organization */
+ skb->data[5] = 0x00;
+ skb->data[6] = 0x80;
+ skb->data[7] = 0xC2;
+ /* PID 00-07 stands for Ethernet frames without FCS */
+ skb->data[8] = 0x00;
+ skb->data[9] = 0x07;
+
+ } else {
+ return -EINVAL;
+ }
+
+ dlci_to_q922(skb->data, dlci);
+ skb->data[2] = FR_UI;
+ return 0;
+}
+
+static int pvc_open(struct net_device *dev)
+{
+ struct pvc_device *pvc = dev->ml_priv;
+
+ if ((pvc->frad->flags & IFF_UP) == 0)
+ return -EIO; /* Frad must be UP in order to activate PVC */
+
+ if (pvc->open_count++ == 0) {
+ hdlc_device *hdlc = dev_to_hdlc(pvc->frad);
+
+ if (state(hdlc)->settings.lmi == LMI_NONE)
+ pvc->state.active = netif_carrier_ok(pvc->frad);
+
+ pvc_carrier(pvc->state.active, pvc);
+ state(hdlc)->dce_changed = 1;
+ }
+ return 0;
+}
+
+static int pvc_close(struct net_device *dev)
+{
+ struct pvc_device *pvc = dev->ml_priv;
+
+ if (--pvc->open_count == 0) {
+ hdlc_device *hdlc = dev_to_hdlc(pvc->frad);
+
+ if (state(hdlc)->settings.lmi == LMI_NONE)
+ pvc->state.active = 0;
+
+ if (state(hdlc)->settings.dce) {
+ state(hdlc)->dce_changed = 1;
+ pvc->state.active = 0;
+ }
+ }
+ return 0;
+}
+
+static int pvc_ioctl(struct net_device *dev, struct if_settings *ifs)
+{
+ struct pvc_device *pvc = dev->ml_priv;
+ fr_proto_pvc_info info;
+
+ if (ifs->type == IF_GET_PROTO) {
+ if (dev->type == ARPHRD_ETHER)
+ ifs->type = IF_PROTO_FR_ETH_PVC;
+ else
+ ifs->type = IF_PROTO_FR_PVC;
+
+ if (ifs->size < sizeof(info)) {
+ /* data size wanted */
+ ifs->size = sizeof(info);
+ return -ENOBUFS;
+ }
+
+ info.dlci = pvc->dlci;
+ memcpy(info.master, pvc->frad->name, IFNAMSIZ);
+ if (copy_to_user(ifs->ifs_ifsu.fr_pvc_info,
+ &info, sizeof(info)))
+ return -EFAULT;
+ return 0;
+ }
+
+ return -EINVAL;
+}
+
+static netdev_tx_t pvc_xmit(struct sk_buff *skb, struct net_device *dev)
+{
+ struct pvc_device *pvc = dev->ml_priv;
+
+ if (!pvc->state.active)
+ goto drop;
+
+ if (dev->type == ARPHRD_ETHER) {
+ int pad = ETH_ZLEN - skb->len;
+
+ if (pad > 0) { /* Pad the frame with zeros */
+ if (__skb_pad(skb, pad, false))
+ goto drop;
+ skb_put(skb, pad);
+ }
+ }
+
+ /* We already requested the header space with dev->needed_headroom.
+ * So this is just a protection in case the upper layer didn't take
+ * dev->needed_headroom into consideration.
+ */
+ if (skb_headroom(skb) < 10) {
+ struct sk_buff *skb2 = skb_realloc_headroom(skb, 10);
+
+ if (!skb2)
+ goto drop;
+ dev_kfree_skb(skb);
+ skb = skb2;
+ }
+
+ skb->dev = dev;
+ if (fr_hard_header(skb, pvc->dlci))
+ goto drop;
+
+ dev->stats.tx_bytes += skb->len;
+ dev->stats.tx_packets++;
+ if (pvc->state.fecn) /* TX Congestion counter */
+ dev->stats.tx_compressed++;
+ skb->dev = pvc->frad;
+ skb->protocol = htons(ETH_P_HDLC);
+ skb_reset_network_header(skb);
+ dev_queue_xmit(skb);
+ return NETDEV_TX_OK;
+
+drop:
+ dev->stats.tx_dropped++;
+ kfree_skb(skb);
+ return NETDEV_TX_OK;
+}
+
+static inline void fr_log_dlci_active(struct pvc_device *pvc)
+{
+ netdev_info(pvc->frad, "DLCI %d [%s%s%s]%s %s\n",
+ pvc->dlci,
+ pvc->main ? pvc->main->name : "",
+ pvc->main && pvc->ether ? " " : "",
+ pvc->ether ? pvc->ether->name : "",
+ pvc->state.new ? " new" : "",
+ !pvc->state.exist ? "deleted" :
+ pvc->state.active ? "active" : "inactive");
+}
+
+static inline u8 fr_lmi_nextseq(u8 x)
+{
+ x++;
+ return x ? x : 1;
+}
+
+static void fr_lmi_send(struct net_device *dev, int fullrep)
+{
+ hdlc_device *hdlc = dev_to_hdlc(dev);
+ struct sk_buff *skb;
+ struct pvc_device *pvc = state(hdlc)->first_pvc;
+ int lmi = state(hdlc)->settings.lmi;
+ int dce = state(hdlc)->settings.dce;
+ int len = lmi == LMI_ANSI ? LMI_ANSI_LENGTH : LMI_CCITT_CISCO_LENGTH;
+ int stat_len = (lmi == LMI_CISCO) ? 6 : 3;
+ u8 *data;
+ int i = 0;
+
+ if (dce && fullrep) {
+ len += state(hdlc)->dce_pvc_count * (2 + stat_len);
+ if (len > HDLC_MAX_MRU) {
+ netdev_warn(dev, "Too many PVCs while sending LMI full report\n");
+ return;
+ }
+ }
+
+ skb = dev_alloc_skb(len);
+ if (!skb)
+ return;
+
+ memset(skb->data, 0, len);
+ skb_reserve(skb, 4);
+ if (lmi == LMI_CISCO)
+ fr_hard_header(skb, LMI_CISCO_DLCI);
+ else
+ fr_hard_header(skb, LMI_CCITT_ANSI_DLCI);
+
+ data = skb_tail_pointer(skb);
+ data[i++] = LMI_CALLREF;
+ data[i++] = dce ? LMI_STATUS : LMI_STATUS_ENQUIRY;
+ if (lmi == LMI_ANSI)
+ data[i++] = LMI_ANSI_LOCKSHIFT;
+ data[i++] = lmi == LMI_CCITT ? LMI_CCITT_REPTYPE :
+ LMI_ANSI_CISCO_REPTYPE;
+ data[i++] = LMI_REPT_LEN;
+ data[i++] = fullrep ? LMI_FULLREP : LMI_INTEGRITY;
+ data[i++] = lmi == LMI_CCITT ? LMI_CCITT_ALIVE : LMI_ANSI_CISCO_ALIVE;
+ data[i++] = LMI_INTEG_LEN;
+ data[i++] = state(hdlc)->txseq =
+ fr_lmi_nextseq(state(hdlc)->txseq);
+ data[i++] = state(hdlc)->rxseq;
+
+ if (dce && fullrep) {
+ while (pvc) {
+ data[i++] = lmi == LMI_CCITT ? LMI_CCITT_PVCSTAT :
+ LMI_ANSI_CISCO_PVCSTAT;
+ data[i++] = stat_len;
+
+ /* LMI start/restart */
+ if (state(hdlc)->reliable && !pvc->state.exist) {
+ pvc->state.exist = pvc->state.new = 1;
+ fr_log_dlci_active(pvc);
+ }
+
+ /* ifconfig PVC up */
+ if (pvc->open_count && !pvc->state.active &&
+ pvc->state.exist && !pvc->state.new) {
+ pvc_carrier(1, pvc);
+ pvc->state.active = 1;
+ fr_log_dlci_active(pvc);
+ }
+
+ if (lmi == LMI_CISCO) {
+ data[i] = pvc->dlci >> 8;
+ data[i + 1] = pvc->dlci & 0xFF;
+ } else {
+ data[i] = (pvc->dlci >> 4) & 0x3F;
+ data[i + 1] = ((pvc->dlci << 3) & 0x78) | 0x80;
+ data[i + 2] = 0x80;
+ }
+
+ if (pvc->state.new)
+ data[i + 2] |= 0x08;
+ else if (pvc->state.active)
+ data[i + 2] |= 0x02;
+
+ i += stat_len;
+ pvc = pvc->next;
+ }
+ }
+
+ skb_put(skb, i);
+ skb->priority = TC_PRIO_CONTROL;
+ skb->dev = dev;
+ skb->protocol = htons(ETH_P_HDLC);
+ skb_reset_network_header(skb);
+
+ dev_queue_xmit(skb);
+}
+
+static void fr_set_link_state(int reliable, struct net_device *dev)
+{
+ hdlc_device *hdlc = dev_to_hdlc(dev);
+ struct pvc_device *pvc = state(hdlc)->first_pvc;
+
+ state(hdlc)->reliable = reliable;
+ if (reliable) {
+ netif_dormant_off(dev);
+ state(hdlc)->n391cnt = 0; /* Request full status */
+ state(hdlc)->dce_changed = 1;
+
+ if (state(hdlc)->settings.lmi == LMI_NONE) {
+ while (pvc) { /* Activate all PVCs */
+ pvc_carrier(1, pvc);
+ pvc->state.exist = pvc->state.active = 1;
+ pvc->state.new = 0;
+ pvc = pvc->next;
+ }
+ }
+ } else {
+ netif_dormant_on(dev);
+ while (pvc) { /* Deactivate all PVCs */
+ pvc_carrier(0, pvc);
+ pvc->state.exist = pvc->state.active = 0;
+ pvc->state.new = 0;
+ if (!state(hdlc)->settings.dce)
+ pvc->state.bandwidth = 0;
+ pvc = pvc->next;
+ }
+ }
+}
+
+static void fr_timer(struct timer_list *t)
+{
+ struct frad_state *st = from_timer(st, t, timer);
+ struct net_device *dev = st->dev;
+ hdlc_device *hdlc = dev_to_hdlc(dev);
+ int i, cnt = 0, reliable;
+ u32 list;
+
+ if (state(hdlc)->settings.dce) {
+ reliable = state(hdlc)->request &&
+ time_before(jiffies, state(hdlc)->last_poll +
+ state(hdlc)->settings.t392 * HZ);
+ state(hdlc)->request = 0;
+ } else {
+ state(hdlc)->last_errors <<= 1; /* Shift the list */
+ if (state(hdlc)->request) {
+ if (state(hdlc)->reliable)
+ netdev_info(dev, "No LMI status reply received\n");
+ state(hdlc)->last_errors |= 1;
+ }
+
+ list = state(hdlc)->last_errors;
+ for (i = 0; i < state(hdlc)->settings.n393; i++, list >>= 1)
+ cnt += (list & 1); /* errors count */
+
+ reliable = (cnt < state(hdlc)->settings.n392);
+ }
+
+ if (state(hdlc)->reliable != reliable) {
+ netdev_info(dev, "Link %sreliable\n", reliable ? "" : "un");
+ fr_set_link_state(reliable, dev);
+ }
+
+ if (state(hdlc)->settings.dce) {
+ state(hdlc)->timer.expires = jiffies +
+ state(hdlc)->settings.t392 * HZ;
+ } else {
+ if (state(hdlc)->n391cnt)
+ state(hdlc)->n391cnt--;
+
+ fr_lmi_send(dev, state(hdlc)->n391cnt == 0);
+
+ state(hdlc)->last_poll = jiffies;
+ state(hdlc)->request = 1;
+ state(hdlc)->timer.expires = jiffies +
+ state(hdlc)->settings.t391 * HZ;
+ }
+
+ add_timer(&state(hdlc)->timer);
+}
+
+static int fr_lmi_recv(struct net_device *dev, struct sk_buff *skb)
+{
+ hdlc_device *hdlc = dev_to_hdlc(dev);
+ struct pvc_device *pvc;
+ u8 rxseq, txseq;
+ int lmi = state(hdlc)->settings.lmi;
+ int dce = state(hdlc)->settings.dce;
+ int stat_len = (lmi == LMI_CISCO) ? 6 : 3, reptype, error, no_ram, i;
+
+ if (skb->len < (lmi == LMI_ANSI ? LMI_ANSI_LENGTH :
+ LMI_CCITT_CISCO_LENGTH)) {
+ netdev_info(dev, "Short LMI frame\n");
+ return 1;
+ }
+
+ if (skb->data[3] != (lmi == LMI_CISCO ? NLPID_CISCO_LMI :
+ NLPID_CCITT_ANSI_LMI)) {
+ netdev_info(dev, "Received non-LMI frame with LMI DLCI\n");
+ return 1;
+ }
+
+ if (skb->data[4] != LMI_CALLREF) {
+ netdev_info(dev, "Invalid LMI Call reference (0x%02X)\n",
+ skb->data[4]);
+ return 1;
+ }
+
+ if (skb->data[5] != (dce ? LMI_STATUS_ENQUIRY : LMI_STATUS)) {
+ netdev_info(dev, "Invalid LMI Message type (0x%02X)\n",
+ skb->data[5]);
+ return 1;
+ }
+
+ if (lmi == LMI_ANSI) {
+ if (skb->data[6] != LMI_ANSI_LOCKSHIFT) {
+ netdev_info(dev, "Not ANSI locking shift in LMI message (0x%02X)\n",
+ skb->data[6]);
+ return 1;
+ }
+ i = 7;
+ } else {
+ i = 6;
+ }
+
+ if (skb->data[i] != (lmi == LMI_CCITT ? LMI_CCITT_REPTYPE :
+ LMI_ANSI_CISCO_REPTYPE)) {
+ netdev_info(dev, "Not an LMI Report type IE (0x%02X)\n",
+ skb->data[i]);
+ return 1;
+ }
+
+ if (skb->data[++i] != LMI_REPT_LEN) {
+ netdev_info(dev, "Invalid LMI Report type IE length (%u)\n",
+ skb->data[i]);
+ return 1;
+ }
+
+ reptype = skb->data[++i];
+ if (reptype != LMI_INTEGRITY && reptype != LMI_FULLREP) {
+ netdev_info(dev, "Unsupported LMI Report type (0x%02X)\n",
+ reptype);
+ return 1;
+ }
+
+ if (skb->data[++i] != (lmi == LMI_CCITT ? LMI_CCITT_ALIVE :
+ LMI_ANSI_CISCO_ALIVE)) {
+ netdev_info(dev, "Not an LMI Link integrity verification IE (0x%02X)\n",
+ skb->data[i]);
+ return 1;
+ }
+
+ if (skb->data[++i] != LMI_INTEG_LEN) {
+ netdev_info(dev, "Invalid LMI Link integrity verification IE length (%u)\n",
+ skb->data[i]);
+ return 1;
+ }
+ i++;
+
+ state(hdlc)->rxseq = skb->data[i++]; /* TX sequence from peer */
+ rxseq = skb->data[i++]; /* Should confirm our sequence */
+
+ txseq = state(hdlc)->txseq;
+
+ if (dce)
+ state(hdlc)->last_poll = jiffies;
+
+ error = 0;
+ if (!state(hdlc)->reliable)
+ error = 1;
+
+ if (rxseq == 0 || rxseq != txseq) { /* Ask for full report next time */
+ state(hdlc)->n391cnt = 0;
+ error = 1;
+ }
+
+ if (dce) {
+ if (state(hdlc)->fullrep_sent && !error) {
+/* Stop sending full report - the last one has been confirmed by DTE */
+ state(hdlc)->fullrep_sent = 0;
+ pvc = state(hdlc)->first_pvc;
+ while (pvc) {
+ if (pvc->state.new) {
+ pvc->state.new = 0;
+
+/* Tell DTE that new PVC is now active */
+ state(hdlc)->dce_changed = 1;
+ }
+ pvc = pvc->next;
+ }
+ }
+
+ if (state(hdlc)->dce_changed) {
+ reptype = LMI_FULLREP;
+ state(hdlc)->fullrep_sent = 1;
+ state(hdlc)->dce_changed = 0;
+ }
+
+ state(hdlc)->request = 1; /* got request */
+ fr_lmi_send(dev, reptype == LMI_FULLREP ? 1 : 0);
+ return 0;
+ }
+
+ /* DTE */
+
+ state(hdlc)->request = 0; /* got response, no request pending */
+
+ if (error)
+ return 0;
+
+ if (reptype != LMI_FULLREP)
+ return 0;
+
+ pvc = state(hdlc)->first_pvc;
+
+ while (pvc) {
+ pvc->state.deleted = 1;
+ pvc = pvc->next;
+ }
+
+ no_ram = 0;
+ while (skb->len >= i + 2 + stat_len) {
+ u16 dlci;
+ u32 bw;
+ unsigned int active, new;
+
+ if (skb->data[i] != (lmi == LMI_CCITT ? LMI_CCITT_PVCSTAT :
+ LMI_ANSI_CISCO_PVCSTAT)) {
+ netdev_info(dev, "Not an LMI PVC status IE (0x%02X)\n",
+ skb->data[i]);
+ return 1;
+ }
+
+ if (skb->data[++i] != stat_len) {
+ netdev_info(dev, "Invalid LMI PVC status IE length (%u)\n",
+ skb->data[i]);
+ return 1;
+ }
+ i++;
+
+ new = !!(skb->data[i + 2] & 0x08);
+ active = !!(skb->data[i + 2] & 0x02);
+ if (lmi == LMI_CISCO) {
+ dlci = (skb->data[i] << 8) | skb->data[i + 1];
+ bw = (skb->data[i + 3] << 16) |
+ (skb->data[i + 4] << 8) |
+ (skb->data[i + 5]);
+ } else {
+ dlci = ((skb->data[i] & 0x3F) << 4) |
+ ((skb->data[i + 1] & 0x78) >> 3);
+ bw = 0;
+ }
+
+ pvc = add_pvc(dev, dlci);
+
+ if (!pvc && !no_ram) {
+ netdev_warn(dev, "Memory squeeze on fr_lmi_recv()\n");
+ no_ram = 1;
+ }
+
+ if (pvc) {
+ pvc->state.exist = 1;
+ pvc->state.deleted = 0;
+ if (active != pvc->state.active ||
+ new != pvc->state.new ||
+ bw != pvc->state.bandwidth ||
+ !pvc->state.exist) {
+ pvc->state.new = new;
+ pvc->state.active = active;
+ pvc->state.bandwidth = bw;
+ pvc_carrier(active, pvc);
+ fr_log_dlci_active(pvc);
+ }
+ }
+
+ i += stat_len;
+ }
+
+ pvc = state(hdlc)->first_pvc;
+
+ while (pvc) {
+ if (pvc->state.deleted && pvc->state.exist) {
+ pvc_carrier(0, pvc);
+ pvc->state.active = pvc->state.new = 0;
+ pvc->state.exist = 0;
+ pvc->state.bandwidth = 0;
+ fr_log_dlci_active(pvc);
+ }
+ pvc = pvc->next;
+ }
+
+ /* Next full report after N391 polls */
+ state(hdlc)->n391cnt = state(hdlc)->settings.n391;
+
+ return 0;
+}
+
+static int fr_snap_parse(struct sk_buff *skb, struct pvc_device *pvc)
+{
+ /* OUI 00-00-00 indicates an Ethertype follows */
+ if (skb->data[0] == 0x00 &&
+ skb->data[1] == 0x00 &&
+ skb->data[2] == 0x00) {
+ if (!pvc->main)
+ return -1;
+ skb->dev = pvc->main;
+ skb->protocol = *(__be16 *)(skb->data + 3); /* Ethertype */
+ skb_pull(skb, 5);
+ skb_reset_mac_header(skb);
+ return 0;
+
+ /* OUI 00-80-C2 stands for the 802.1 organization */
+ } else if (skb->data[0] == 0x00 &&
+ skb->data[1] == 0x80 &&
+ skb->data[2] == 0xC2) {
+ /* PID 00-07 stands for Ethernet frames without FCS */
+ if (skb->data[3] == 0x00 &&
+ skb->data[4] == 0x07) {
+ if (!pvc->ether)
+ return -1;
+ skb_pull(skb, 5);
+ if (skb->len < ETH_HLEN)
+ return -1;
+ skb->protocol = eth_type_trans(skb, pvc->ether);
+ return 0;
+
+ /* PID unsupported */
+ } else {
+ return -1;
+ }
+
+ /* OUI unsupported */
+ } else {
+ return -1;
+ }
+}
+
+static int fr_rx(struct sk_buff *skb)
+{
+ struct net_device *frad = skb->dev;
+ hdlc_device *hdlc = dev_to_hdlc(frad);
+ struct fr_hdr *fh = (struct fr_hdr *)skb->data;
+ u8 *data = skb->data;
+ u16 dlci;
+ struct pvc_device *pvc;
+ struct net_device *dev;
+
+ if (skb->len < 4 || fh->ea1 || !fh->ea2 || data[2] != FR_UI)
+ goto rx_error;
+
+ dlci = q922_to_dlci(skb->data);
+
+ if ((dlci == LMI_CCITT_ANSI_DLCI &&
+ (state(hdlc)->settings.lmi == LMI_ANSI ||
+ state(hdlc)->settings.lmi == LMI_CCITT)) ||
+ (dlci == LMI_CISCO_DLCI &&
+ state(hdlc)->settings.lmi == LMI_CISCO)) {
+ if (fr_lmi_recv(frad, skb))
+ goto rx_error;
+ dev_kfree_skb_any(skb);
+ return NET_RX_SUCCESS;
+ }
+
+ pvc = find_pvc(hdlc, dlci);
+ if (!pvc) {
+#ifdef DEBUG_PKT
+ netdev_info(frad, "No PVC for received frame's DLCI %d\n",
+ dlci);
+#endif
+ goto rx_drop;
+ }
+
+ if (pvc->state.fecn != fh->fecn) {
+#ifdef DEBUG_ECN
+ printk(KERN_DEBUG "%s: DLCI %d FECN O%s\n", frad->name,
+ dlci, fh->fecn ? "N" : "FF");
+#endif
+ pvc->state.fecn ^= 1;
+ }
+
+ if (pvc->state.becn != fh->becn) {
+#ifdef DEBUG_ECN
+ printk(KERN_DEBUG "%s: DLCI %d BECN O%s\n", frad->name,
+ dlci, fh->becn ? "N" : "FF");
+#endif
+ pvc->state.becn ^= 1;
+ }
+
+ skb = skb_share_check(skb, GFP_ATOMIC);
+ if (!skb) {
+ frad->stats.rx_dropped++;
+ return NET_RX_DROP;
+ }
+
+ if (data[3] == NLPID_IP) {
+ if (!pvc->main)
+ goto rx_drop;
+ skb_pull(skb, 4); /* Remove 4-byte header (hdr, UI, NLPID) */
+ skb->dev = pvc->main;
+ skb->protocol = htons(ETH_P_IP);
+ skb_reset_mac_header(skb);
+
+ } else if (data[3] == NLPID_IPV6) {
+ if (!pvc->main)
+ goto rx_drop;
+ skb_pull(skb, 4); /* Remove 4-byte header (hdr, UI, NLPID) */
+ skb->dev = pvc->main;
+ skb->protocol = htons(ETH_P_IPV6);
+ skb_reset_mac_header(skb);
+
+ } else if (data[3] == FR_PAD) {
+ if (skb->len < 5)
+ goto rx_error;
+ if (data[4] == NLPID_SNAP) { /* A SNAP header follows */
+ skb_pull(skb, 5);
+ if (skb->len < 5) /* Incomplete SNAP header */
+ goto rx_error;
+ if (fr_snap_parse(skb, pvc))
+ goto rx_drop;
+ } else {
+ goto rx_drop;
+ }
+
+ } else {
+ netdev_info(frad, "Unsupported protocol, NLPID=%x length=%i\n",
+ data[3], skb->len);
+ goto rx_drop;
+ }
+
+ dev = skb->dev;
+ dev->stats.rx_packets++; /* PVC traffic */
+ dev->stats.rx_bytes += skb->len;
+ if (pvc->state.becn)
+ dev->stats.rx_compressed++;
+ netif_rx(skb);
+ return NET_RX_SUCCESS;
+
+rx_error:
+ frad->stats.rx_errors++; /* Mark error */
+rx_drop:
+ dev_kfree_skb_any(skb);
+ return NET_RX_DROP;
+}
+
+static void fr_start(struct net_device *dev)
+{
+ hdlc_device *hdlc = dev_to_hdlc(dev);
+#ifdef DEBUG_LINK
+ printk(KERN_DEBUG "fr_start\n");
+#endif
+ if (state(hdlc)->settings.lmi != LMI_NONE) {
+ state(hdlc)->reliable = 0;
+ state(hdlc)->dce_changed = 1;
+ state(hdlc)->request = 0;
+ state(hdlc)->fullrep_sent = 0;
+ state(hdlc)->last_errors = 0xFFFFFFFF;
+ state(hdlc)->n391cnt = 0;
+ state(hdlc)->txseq = state(hdlc)->rxseq = 0;
+
+ state(hdlc)->dev = dev;
+ timer_setup(&state(hdlc)->timer, fr_timer, 0);
+ /* First poll after 1 s */
+ state(hdlc)->timer.expires = jiffies + HZ;
+ add_timer(&state(hdlc)->timer);
+ } else {
+ fr_set_link_state(1, dev);
+ }
+}
+
+static void fr_stop(struct net_device *dev)
+{
+ hdlc_device *hdlc = dev_to_hdlc(dev);
+#ifdef DEBUG_LINK
+ printk(KERN_DEBUG "fr_stop\n");
+#endif
+ if (state(hdlc)->settings.lmi != LMI_NONE)
+ del_timer_sync(&state(hdlc)->timer);
+ fr_set_link_state(0, dev);
+}
+
+static void fr_close(struct net_device *dev)
+{
+ hdlc_device *hdlc = dev_to_hdlc(dev);
+ struct pvc_device *pvc = state(hdlc)->first_pvc;
+
+ while (pvc) { /* Shutdown all PVCs for this FRAD */
+ if (pvc->main)
+ dev_close(pvc->main);
+ if (pvc->ether)
+ dev_close(pvc->ether);
+ pvc = pvc->next;
+ }
+}
+
+static void pvc_setup(struct net_device *dev)
+{
+ dev->type = ARPHRD_DLCI;
+ dev->flags = IFF_POINTOPOINT;
+ dev->hard_header_len = 0;
+ dev->addr_len = 2;
+ netif_keep_dst(dev);
+}
+
+static const struct net_device_ops pvc_ops = {
+ .ndo_open = pvc_open,
+ .ndo_stop = pvc_close,
+ .ndo_start_xmit = pvc_xmit,
+ .ndo_siocwandev = pvc_ioctl,
+};
+
+static int fr_add_pvc(struct net_device *frad, unsigned int dlci, int type)
+{
+ hdlc_device *hdlc = dev_to_hdlc(frad);
+ struct pvc_device *pvc;
+ struct net_device *dev;
+ int used;
+
+ pvc = add_pvc(frad, dlci);
+ if (!pvc) {
+ netdev_warn(frad, "Memory squeeze on fr_add_pvc()\n");
+ return -ENOBUFS;
+ }
+
+ if (*get_dev_p(pvc, type))
+ return -EEXIST;
+
+ used = pvc_is_used(pvc);
+
+ if (type == ARPHRD_ETHER)
+ dev = alloc_netdev(0, "pvceth%d", NET_NAME_UNKNOWN,
+ ether_setup);
+ else
+ dev = alloc_netdev(0, "pvc%d", NET_NAME_UNKNOWN, pvc_setup);
+
+ if (!dev) {
+ netdev_warn(frad, "Memory squeeze on fr_pvc()\n");
+ delete_unused_pvcs(hdlc);
+ return -ENOBUFS;
+ }
+
+ if (type == ARPHRD_ETHER) {
+ dev->priv_flags &= ~IFF_TX_SKB_SHARING;
+ eth_hw_addr_random(dev);
+ } else {
+ __be16 addr = htons(dlci);
+
+ dev_addr_set(dev, (u8 *)&addr);
+ dlci_to_q922(dev->broadcast, dlci);
+ }
+ dev->netdev_ops = &pvc_ops;
+ dev->mtu = HDLC_MAX_MTU;
+ dev->min_mtu = 68;
+ dev->max_mtu = HDLC_MAX_MTU;
+ dev->needed_headroom = 10;
+ dev->priv_flags |= IFF_NO_QUEUE;
+ dev->ml_priv = pvc;
+
+ if (register_netdevice(dev) != 0) {
+ free_netdev(dev);
+ delete_unused_pvcs(hdlc);
+ return -EIO;
+ }
+
+ dev->needs_free_netdev = true;
+ *get_dev_p(pvc, type) = dev;
+ if (!used) {
+ state(hdlc)->dce_changed = 1;
+ state(hdlc)->dce_pvc_count++;
+ }
+ return 0;
+}
+
+static int fr_del_pvc(hdlc_device *hdlc, unsigned int dlci, int type)
+{
+ struct pvc_device *pvc;
+ struct net_device *dev;
+
+ pvc = find_pvc(hdlc, dlci);
+ if (!pvc)
+ return -ENOENT;
+
+ dev = *get_dev_p(pvc, type);
+ if (!dev)
+ return -ENOENT;
+
+ if (dev->flags & IFF_UP)
+ return -EBUSY; /* PVC in use */
+
+ unregister_netdevice(dev); /* the destructor will free_netdev(dev) */
+ *get_dev_p(pvc, type) = NULL;
+
+ if (!pvc_is_used(pvc)) {
+ state(hdlc)->dce_pvc_count--;
+ state(hdlc)->dce_changed = 1;
+ }
+ delete_unused_pvcs(hdlc);
+ return 0;
+}
+
+static void fr_destroy(struct net_device *frad)
+{
+ hdlc_device *hdlc = dev_to_hdlc(frad);
+ struct pvc_device *pvc = state(hdlc)->first_pvc;
+
+ state(hdlc)->first_pvc = NULL; /* All PVCs destroyed */
+ state(hdlc)->dce_pvc_count = 0;
+ state(hdlc)->dce_changed = 1;
+
+ while (pvc) {
+ struct pvc_device *next = pvc->next;
+ /* destructors will free_netdev() main and ether */
+ if (pvc->main)
+ unregister_netdevice(pvc->main);
+
+ if (pvc->ether)
+ unregister_netdevice(pvc->ether);
+
+ kfree(pvc);
+ pvc = next;
+ }
+}
+
+static struct hdlc_proto proto = {
+ .close = fr_close,
+ .start = fr_start,
+ .stop = fr_stop,
+ .detach = fr_destroy,
+ .ioctl = fr_ioctl,
+ .netif_rx = fr_rx,
+ .module = THIS_MODULE,
+};
+
+static int fr_ioctl(struct net_device *dev, struct if_settings *ifs)
+{
+ fr_proto __user *fr_s = ifs->ifs_ifsu.fr;
+ const size_t size = sizeof(fr_proto);
+ fr_proto new_settings;
+ hdlc_device *hdlc = dev_to_hdlc(dev);
+ fr_proto_pvc pvc;
+ int result;
+
+ switch (ifs->type) {
+ case IF_GET_PROTO:
+ if (dev_to_hdlc(dev)->proto != &proto) /* Different proto */
+ return -EINVAL;
+ ifs->type = IF_PROTO_FR;
+ if (ifs->size < size) {
+ ifs->size = size; /* data size wanted */
+ return -ENOBUFS;
+ }
+ if (copy_to_user(fr_s, &state(hdlc)->settings, size))
+ return -EFAULT;
+ return 0;
+
+ case IF_PROTO_FR:
+ if (!capable(CAP_NET_ADMIN))
+ return -EPERM;
+
+ if (dev->flags & IFF_UP)
+ return -EBUSY;
+
+ if (copy_from_user(&new_settings, fr_s, size))
+ return -EFAULT;
+
+ if (new_settings.lmi == LMI_DEFAULT)
+ new_settings.lmi = LMI_ANSI;
+
+ if ((new_settings.lmi != LMI_NONE &&
+ new_settings.lmi != LMI_ANSI &&
+ new_settings.lmi != LMI_CCITT &&
+ new_settings.lmi != LMI_CISCO) ||
+ new_settings.t391 < 1 ||
+ new_settings.t392 < 2 ||
+ new_settings.n391 < 1 ||
+ new_settings.n392 < 1 ||
+ new_settings.n393 < new_settings.n392 ||
+ new_settings.n393 > 32 ||
+ (new_settings.dce != 0 &&
+ new_settings.dce != 1))
+ return -EINVAL;
+
+ result = hdlc->attach(dev, ENCODING_NRZ,
+ PARITY_CRC16_PR1_CCITT);
+ if (result)
+ return result;
+
+ if (dev_to_hdlc(dev)->proto != &proto) { /* Different proto */
+ result = attach_hdlc_protocol(dev, &proto,
+ sizeof(struct frad_state));
+ if (result)
+ return result;
+ state(hdlc)->first_pvc = NULL;
+ state(hdlc)->dce_pvc_count = 0;
+ }
+ memcpy(&state(hdlc)->settings, &new_settings, size);
+ dev->type = ARPHRD_FRAD;
+ call_netdevice_notifiers(NETDEV_POST_TYPE_CHANGE, dev);
+ return 0;
+
+ case IF_PROTO_FR_ADD_PVC:
+ case IF_PROTO_FR_DEL_PVC:
+ case IF_PROTO_FR_ADD_ETH_PVC:
+ case IF_PROTO_FR_DEL_ETH_PVC:
+ if (dev_to_hdlc(dev)->proto != &proto) /* Different proto */
+ return -EINVAL;
+
+ if (!capable(CAP_NET_ADMIN))
+ return -EPERM;
+
+ if (copy_from_user(&pvc, ifs->ifs_ifsu.fr_pvc,
+ sizeof(fr_proto_pvc)))
+ return -EFAULT;
+
+ if (pvc.dlci <= 0 || pvc.dlci >= 1024)
+ return -EINVAL; /* Only 10 bits, DLCI 0 reserved */
+
+ if (ifs->type == IF_PROTO_FR_ADD_ETH_PVC ||
+ ifs->type == IF_PROTO_FR_DEL_ETH_PVC)
+ result = ARPHRD_ETHER; /* bridged Ethernet device */
+ else
+ result = ARPHRD_DLCI;
+
+ if (ifs->type == IF_PROTO_FR_ADD_PVC ||
+ ifs->type == IF_PROTO_FR_ADD_ETH_PVC)
+ return fr_add_pvc(dev, pvc.dlci, result);
+ else
+ return fr_del_pvc(hdlc, pvc.dlci, result);
+ }
+
+ return -EINVAL;
+}
+
+static int __init hdlc_fr_init(void)
+{
+ register_hdlc_protocol(&proto);
+ return 0;
+}
+
+static void __exit hdlc_fr_exit(void)
+{
+ unregister_hdlc_protocol(&proto);
+}
+
+module_init(hdlc_fr_init);
+module_exit(hdlc_fr_exit);
+
+MODULE_AUTHOR("Krzysztof Halasa <khc@pm.waw.pl>");
+MODULE_DESCRIPTION("Frame-Relay protocol support for generic HDLC");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/net/wan/hdlc_ppp.c b/drivers/net/wan/hdlc_ppp.c
new file mode 100644
index 000000000..37a3c989c
--- /dev/null
+++ b/drivers/net/wan/hdlc_ppp.c
@@ -0,0 +1,725 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Generic HDLC support routines for Linux
+ * Point-to-point protocol support
+ *
+ * Copyright (C) 1999 - 2008 Krzysztof Halasa <khc@pm.waw.pl>
+ */
+
+#include <linux/errno.h>
+#include <linux/hdlc.h>
+#include <linux/if_arp.h>
+#include <linux/inetdevice.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/pkt_sched.h>
+#include <linux/poll.h>
+#include <linux/skbuff.h>
+#include <linux/slab.h>
+#include <linux/spinlock.h>
+
+#define DEBUG_CP 0 /* also bytes# to dump */
+#define DEBUG_STATE 0
+#define DEBUG_HARD_HEADER 0
+
+#define HDLC_ADDR_ALLSTATIONS 0xFF
+#define HDLC_CTRL_UI 0x03
+
+#define PID_LCP 0xC021
+#define PID_IP 0x0021
+#define PID_IPCP 0x8021
+#define PID_IPV6 0x0057
+#define PID_IPV6CP 0x8057
+
+enum {IDX_LCP = 0, IDX_IPCP, IDX_IPV6CP, IDX_COUNT};
+enum {CP_CONF_REQ = 1, CP_CONF_ACK, CP_CONF_NAK, CP_CONF_REJ, CP_TERM_REQ,
+ CP_TERM_ACK, CP_CODE_REJ, LCP_PROTO_REJ, LCP_ECHO_REQ, LCP_ECHO_REPLY,
+ LCP_DISC_REQ, CP_CODES};
+#if DEBUG_CP
+static const char *const code_names[CP_CODES] = {
+ "0", "ConfReq", "ConfAck", "ConfNak", "ConfRej", "TermReq",
+ "TermAck", "CodeRej", "ProtoRej", "EchoReq", "EchoReply", "Discard"
+};
+
+static char debug_buffer[64 + 3 * DEBUG_CP];
+#endif
+
+enum {LCP_OPTION_MRU = 1, LCP_OPTION_ACCM, LCP_OPTION_MAGIC = 5};
+
+struct hdlc_header {
+ u8 address;
+ u8 control;
+ __be16 protocol;
+};
+
+struct cp_header {
+ u8 code;
+ u8 id;
+ __be16 len;
+};
+
+struct proto {
+ struct net_device *dev;
+ struct timer_list timer;
+ unsigned long timeout;
+ u16 pid; /* protocol ID */
+ u8 state;
+ u8 cr_id; /* ID of last Configuration-Request */
+ u8 restart_counter;
+};
+
+struct ppp {
+ struct proto protos[IDX_COUNT];
+ spinlock_t lock;
+ unsigned long last_pong;
+ unsigned int req_timeout, cr_retries, term_retries;
+ unsigned int keepalive_interval, keepalive_timeout;
+ u8 seq; /* local sequence number for requests */
+ u8 echo_id; /* ID of last Echo-Request (LCP) */
+};
+
+enum {CLOSED = 0, STOPPED, STOPPING, REQ_SENT, ACK_RECV, ACK_SENT, OPENED,
+ STATES, STATE_MASK = 0xF};
+enum {START = 0, STOP, TO_GOOD, TO_BAD, RCR_GOOD, RCR_BAD, RCA, RCN, RTR, RTA,
+ RUC, RXJ_GOOD, RXJ_BAD, EVENTS};
+enum {INV = 0x10, IRC = 0x20, ZRC = 0x40, SCR = 0x80, SCA = 0x100,
+ SCN = 0x200, STR = 0x400, STA = 0x800, SCJ = 0x1000};
+
+#if DEBUG_STATE
+static const char *const state_names[STATES] = {
+ "Closed", "Stopped", "Stopping", "ReqSent", "AckRecv", "AckSent",
+ "Opened"
+};
+
+static const char *const event_names[EVENTS] = {
+ "Start", "Stop", "TO+", "TO-", "RCR+", "RCR-", "RCA", "RCN",
+ "RTR", "RTA", "RUC", "RXJ+", "RXJ-"
+};
+#endif
+
+static struct sk_buff_head tx_queue; /* used when holding the spin lock */
+
+static int ppp_ioctl(struct net_device *dev, struct if_settings *ifs);
+
+static inline struct ppp *get_ppp(struct net_device *dev)
+{
+ return (struct ppp *)dev_to_hdlc(dev)->state;
+}
+
+static inline struct proto *get_proto(struct net_device *dev, u16 pid)
+{
+ struct ppp *ppp = get_ppp(dev);
+
+ switch (pid) {
+ case PID_LCP:
+ return &ppp->protos[IDX_LCP];
+ case PID_IPCP:
+ return &ppp->protos[IDX_IPCP];
+ case PID_IPV6CP:
+ return &ppp->protos[IDX_IPV6CP];
+ default:
+ return NULL;
+ }
+}
+
+static inline const char *proto_name(u16 pid)
+{
+ switch (pid) {
+ case PID_LCP:
+ return "LCP";
+ case PID_IPCP:
+ return "IPCP";
+ case PID_IPV6CP:
+ return "IPV6CP";
+ default:
+ return NULL;
+ }
+}
+
+static __be16 ppp_type_trans(struct sk_buff *skb, struct net_device *dev)
+{
+ struct hdlc_header *data = (struct hdlc_header *)skb->data;
+
+ if (skb->len < sizeof(struct hdlc_header))
+ return htons(ETH_P_HDLC);
+ if (data->address != HDLC_ADDR_ALLSTATIONS ||
+ data->control != HDLC_CTRL_UI)
+ return htons(ETH_P_HDLC);
+
+ switch (data->protocol) {
+ case cpu_to_be16(PID_IP):
+ skb_pull(skb, sizeof(struct hdlc_header));
+ return htons(ETH_P_IP);
+
+ case cpu_to_be16(PID_IPV6):
+ skb_pull(skb, sizeof(struct hdlc_header));
+ return htons(ETH_P_IPV6);
+
+ default:
+ return htons(ETH_P_HDLC);
+ }
+}
+
+static int ppp_hard_header(struct sk_buff *skb, struct net_device *dev,
+ u16 type, const void *daddr, const void *saddr,
+ unsigned int len)
+{
+ struct hdlc_header *data;
+#if DEBUG_HARD_HEADER
+ printk(KERN_DEBUG "%s: ppp_hard_header() called\n", dev->name);
+#endif
+
+ skb_push(skb, sizeof(struct hdlc_header));
+ data = (struct hdlc_header *)skb->data;
+
+ data->address = HDLC_ADDR_ALLSTATIONS;
+ data->control = HDLC_CTRL_UI;
+ switch (type) {
+ case ETH_P_IP:
+ data->protocol = htons(PID_IP);
+ break;
+ case ETH_P_IPV6:
+ data->protocol = htons(PID_IPV6);
+ break;
+ case PID_LCP:
+ case PID_IPCP:
+ case PID_IPV6CP:
+ data->protocol = htons(type);
+ break;
+ default: /* unknown protocol */
+ data->protocol = 0;
+ }
+ return sizeof(struct hdlc_header);
+}
+
+static void ppp_tx_flush(void)
+{
+ struct sk_buff *skb;
+
+ while ((skb = skb_dequeue(&tx_queue)) != NULL)
+ dev_queue_xmit(skb);
+}
+
+static void ppp_tx_cp(struct net_device *dev, u16 pid, u8 code,
+ u8 id, unsigned int len, const void *data)
+{
+ struct sk_buff *skb;
+ struct cp_header *cp;
+ unsigned int magic_len = 0;
+ static u32 magic;
+
+#if DEBUG_CP
+ int i;
+ char *ptr;
+#endif
+
+ if (pid == PID_LCP && (code == LCP_ECHO_REQ || code == LCP_ECHO_REPLY))
+ magic_len = sizeof(magic);
+
+ skb = dev_alloc_skb(sizeof(struct hdlc_header) +
+ sizeof(struct cp_header) + magic_len + len);
+ if (!skb)
+ return;
+
+ skb_reserve(skb, sizeof(struct hdlc_header));
+
+ cp = skb_put(skb, sizeof(struct cp_header));
+ cp->code = code;
+ cp->id = id;
+ cp->len = htons(sizeof(struct cp_header) + magic_len + len);
+
+ if (magic_len)
+ skb_put_data(skb, &magic, magic_len);
+ if (len)
+ skb_put_data(skb, data, len);
+
+#if DEBUG_CP
+ BUG_ON(code >= CP_CODES);
+ ptr = debug_buffer;
+ *ptr = '\x0';
+ for (i = 0; i < min_t(unsigned int, magic_len + len, DEBUG_CP); i++) {
+ sprintf(ptr, " %02X", skb->data[sizeof(struct cp_header) + i]);
+ ptr += strlen(ptr);
+ }
+ printk(KERN_DEBUG "%s: TX %s [%s id 0x%X]%s\n", dev->name,
+ proto_name(pid), code_names[code], id, debug_buffer);
+#endif
+
+ ppp_hard_header(skb, dev, pid, NULL, NULL, 0);
+
+ skb->priority = TC_PRIO_CONTROL;
+ skb->dev = dev;
+ skb->protocol = htons(ETH_P_HDLC);
+ skb_reset_network_header(skb);
+ skb_queue_tail(&tx_queue, skb);
+}
+
+/* State transition table (compare STD-51)
+ Events Actions
+ TO+ = Timeout with counter > 0 irc = Initialize-Restart-Count
+ TO- = Timeout with counter expired zrc = Zero-Restart-Count
+
+ RCR+ = Receive-Configure-Request (Good) scr = Send-Configure-Request
+ RCR- = Receive-Configure-Request (Bad)
+ RCA = Receive-Configure-Ack sca = Send-Configure-Ack
+ RCN = Receive-Configure-Nak/Rej scn = Send-Configure-Nak/Rej
+
+ RTR = Receive-Terminate-Request str = Send-Terminate-Request
+ RTA = Receive-Terminate-Ack sta = Send-Terminate-Ack
+
+ RUC = Receive-Unknown-Code scj = Send-Code-Reject
+ RXJ+ = Receive-Code-Reject (permitted)
+ or Receive-Protocol-Reject
+ RXJ- = Receive-Code-Reject (catastrophic)
+ or Receive-Protocol-Reject
+*/
+static int cp_table[EVENTS][STATES] = {
+ /* CLOSED STOPPED STOPPING REQ_SENT ACK_RECV ACK_SENT OPENED
+ 0 1 2 3 4 5 6 */
+ {IRC|SCR|3, INV , INV , INV , INV , INV , INV }, /* START */
+ { INV , 0 , 0 , 0 , 0 , 0 , 0 }, /* STOP */
+ { INV , INV ,STR|2, SCR|3 ,SCR|3, SCR|5 , INV }, /* TO+ */
+ { INV , INV , 1 , 1 , 1 , 1 , INV }, /* TO- */
+ { STA|0 ,IRC|SCR|SCA|5, 2 , SCA|5 ,SCA|6, SCA|5 ,SCR|SCA|5}, /* RCR+ */
+ { STA|0 ,IRC|SCR|SCN|3, 2 , SCN|3 ,SCN|4, SCN|3 ,SCR|SCN|3}, /* RCR- */
+ { STA|0 , STA|1 , 2 , IRC|4 ,SCR|3, 6 , SCR|3 }, /* RCA */
+ { STA|0 , STA|1 , 2 ,IRC|SCR|3,SCR|3,IRC|SCR|5, SCR|3 }, /* RCN */
+ { STA|0 , STA|1 ,STA|2, STA|3 ,STA|3, STA|3 ,ZRC|STA|2}, /* RTR */
+ { 0 , 1 , 1 , 3 , 3 , 5 , SCR|3 }, /* RTA */
+ { SCJ|0 , SCJ|1 ,SCJ|2, SCJ|3 ,SCJ|4, SCJ|5 , SCJ|6 }, /* RUC */
+ { 0 , 1 , 2 , 3 , 3 , 5 , 6 }, /* RXJ+ */
+ { 0 , 1 , 1 , 1 , 1 , 1 ,IRC|STR|2}, /* RXJ- */
+};
+
+/* SCA: RCR+ must supply id, len and data
+ SCN: RCR- must supply code, id, len and data
+ STA: RTR must supply id
+ SCJ: RUC must supply CP packet len and data */
+static void ppp_cp_event(struct net_device *dev, u16 pid, u16 event, u8 code,
+ u8 id, unsigned int len, const void *data)
+{
+ int old_state, action;
+ struct ppp *ppp = get_ppp(dev);
+ struct proto *proto = get_proto(dev, pid);
+
+ old_state = proto->state;
+ BUG_ON(old_state >= STATES);
+ BUG_ON(event >= EVENTS);
+
+#if DEBUG_STATE
+ printk(KERN_DEBUG "%s: %s ppp_cp_event(%s) %s ...\n", dev->name,
+ proto_name(pid), event_names[event], state_names[proto->state]);
+#endif
+
+ action = cp_table[event][old_state];
+
+ proto->state = action & STATE_MASK;
+ if (action & (SCR | STR)) /* set Configure-Req/Terminate-Req timer */
+ mod_timer(&proto->timer, proto->timeout =
+ jiffies + ppp->req_timeout * HZ);
+ if (action & ZRC)
+ proto->restart_counter = 0;
+ if (action & IRC)
+ proto->restart_counter = (proto->state == STOPPING) ?
+ ppp->term_retries : ppp->cr_retries;
+
+ if (action & SCR) /* send Configure-Request */
+ ppp_tx_cp(dev, pid, CP_CONF_REQ, proto->cr_id = ++ppp->seq,
+ 0, NULL);
+ if (action & SCA) /* send Configure-Ack */
+ ppp_tx_cp(dev, pid, CP_CONF_ACK, id, len, data);
+ if (action & SCN) /* send Configure-Nak/Reject */
+ ppp_tx_cp(dev, pid, code, id, len, data);
+ if (action & STR) /* send Terminate-Request */
+ ppp_tx_cp(dev, pid, CP_TERM_REQ, ++ppp->seq, 0, NULL);
+ if (action & STA) /* send Terminate-Ack */
+ ppp_tx_cp(dev, pid, CP_TERM_ACK, id, 0, NULL);
+ if (action & SCJ) /* send Code-Reject */
+ ppp_tx_cp(dev, pid, CP_CODE_REJ, ++ppp->seq, len, data);
+
+ if (old_state != OPENED && proto->state == OPENED) {
+ netdev_info(dev, "%s up\n", proto_name(pid));
+ if (pid == PID_LCP) {
+ netif_dormant_off(dev);
+ ppp_cp_event(dev, PID_IPCP, START, 0, 0, 0, NULL);
+ ppp_cp_event(dev, PID_IPV6CP, START, 0, 0, 0, NULL);
+ ppp->last_pong = jiffies;
+ mod_timer(&proto->timer, proto->timeout =
+ jiffies + ppp->keepalive_interval * HZ);
+ }
+ }
+ if (old_state == OPENED && proto->state != OPENED) {
+ netdev_info(dev, "%s down\n", proto_name(pid));
+ if (pid == PID_LCP) {
+ netif_dormant_on(dev);
+ ppp_cp_event(dev, PID_IPCP, STOP, 0, 0, 0, NULL);
+ ppp_cp_event(dev, PID_IPV6CP, STOP, 0, 0, 0, NULL);
+ }
+ }
+ if (old_state != CLOSED && proto->state == CLOSED)
+ del_timer(&proto->timer);
+
+#if DEBUG_STATE
+ printk(KERN_DEBUG "%s: %s ppp_cp_event(%s) ... %s\n", dev->name,
+ proto_name(pid), event_names[event], state_names[proto->state]);
+#endif
+}
+
+static void ppp_cp_parse_cr(struct net_device *dev, u16 pid, u8 id,
+ unsigned int req_len, const u8 *data)
+{
+ static u8 const valid_accm[6] = { LCP_OPTION_ACCM, 6, 0, 0, 0, 0 };
+ const u8 *opt;
+ u8 *out;
+ unsigned int len = req_len, nak_len = 0, rej_len = 0;
+
+ out = kmalloc(len, GFP_ATOMIC);
+ if (!out) {
+ dev->stats.rx_dropped++;
+ return; /* out of memory, ignore CR packet */
+ }
+
+ for (opt = data; len; len -= opt[1], opt += opt[1]) {
+ if (len < 2 || opt[1] < 2 || len < opt[1])
+ goto err_out;
+
+ if (pid == PID_LCP)
+ switch (opt[0]) {
+ case LCP_OPTION_MRU:
+ continue; /* MRU always OK and > 1500 bytes? */
+
+ case LCP_OPTION_ACCM: /* async control character map */
+ if (opt[1] < sizeof(valid_accm))
+ goto err_out;
+ if (!memcmp(opt, valid_accm,
+ sizeof(valid_accm)))
+ continue;
+ if (!rej_len) { /* NAK it */
+ memcpy(out + nak_len, valid_accm,
+ sizeof(valid_accm));
+ nak_len += sizeof(valid_accm);
+ continue;
+ }
+ break;
+ case LCP_OPTION_MAGIC:
+ if (len < 6)
+ goto err_out;
+ if (opt[1] != 6 || (!opt[2] && !opt[3] &&
+ !opt[4] && !opt[5]))
+ break; /* reject invalid magic number */
+ continue;
+ }
+ /* reject this option */
+ memcpy(out + rej_len, opt, opt[1]);
+ rej_len += opt[1];
+ }
+
+ if (rej_len)
+ ppp_cp_event(dev, pid, RCR_BAD, CP_CONF_REJ, id, rej_len, out);
+ else if (nak_len)
+ ppp_cp_event(dev, pid, RCR_BAD, CP_CONF_NAK, id, nak_len, out);
+ else
+ ppp_cp_event(dev, pid, RCR_GOOD, CP_CONF_ACK, id, req_len, data);
+
+ kfree(out);
+ return;
+
+err_out:
+ dev->stats.rx_errors++;
+ kfree(out);
+}
+
+static int ppp_rx(struct sk_buff *skb)
+{
+ struct hdlc_header *hdr = (struct hdlc_header *)skb->data;
+ struct net_device *dev = skb->dev;
+ struct ppp *ppp = get_ppp(dev);
+ struct proto *proto;
+ struct cp_header *cp;
+ unsigned long flags;
+ unsigned int len;
+ u16 pid;
+#if DEBUG_CP
+ int i;
+ char *ptr;
+#endif
+
+ spin_lock_irqsave(&ppp->lock, flags);
+ /* Check HDLC header */
+ if (skb->len < sizeof(struct hdlc_header))
+ goto rx_error;
+ cp = skb_pull(skb, sizeof(struct hdlc_header));
+ if (hdr->address != HDLC_ADDR_ALLSTATIONS ||
+ hdr->control != HDLC_CTRL_UI)
+ goto rx_error;
+
+ pid = ntohs(hdr->protocol);
+ proto = get_proto(dev, pid);
+ if (!proto) {
+ if (ppp->protos[IDX_LCP].state == OPENED)
+ ppp_tx_cp(dev, PID_LCP, LCP_PROTO_REJ,
+ ++ppp->seq, skb->len + 2, &hdr->protocol);
+ goto rx_error;
+ }
+
+ len = ntohs(cp->len);
+ if (len < sizeof(struct cp_header) /* no complete CP header? */ ||
+ skb->len < len /* truncated packet? */)
+ goto rx_error;
+ skb_pull(skb, sizeof(struct cp_header));
+ len -= sizeof(struct cp_header);
+
+ /* HDLC and CP headers stripped from skb */
+#if DEBUG_CP
+ if (cp->code < CP_CODES)
+ sprintf(debug_buffer, "[%s id 0x%X]", code_names[cp->code],
+ cp->id);
+ else
+ sprintf(debug_buffer, "[code %u id 0x%X]", cp->code, cp->id);
+ ptr = debug_buffer + strlen(debug_buffer);
+ for (i = 0; i < min_t(unsigned int, len, DEBUG_CP); i++) {
+ sprintf(ptr, " %02X", skb->data[i]);
+ ptr += strlen(ptr);
+ }
+ printk(KERN_DEBUG "%s: RX %s %s\n", dev->name, proto_name(pid),
+ debug_buffer);
+#endif
+
+ /* LCP only */
+ if (pid == PID_LCP)
+ switch (cp->code) {
+ case LCP_PROTO_REJ:
+ pid = ntohs(*(__be16 *)skb->data);
+ if (pid == PID_LCP || pid == PID_IPCP ||
+ pid == PID_IPV6CP)
+ ppp_cp_event(dev, pid, RXJ_BAD, 0, 0,
+ 0, NULL);
+ goto out;
+
+ case LCP_ECHO_REQ: /* send Echo-Reply */
+ if (len >= 4 && proto->state == OPENED)
+ ppp_tx_cp(dev, PID_LCP, LCP_ECHO_REPLY,
+ cp->id, len - 4, skb->data + 4);
+ goto out;
+
+ case LCP_ECHO_REPLY:
+ if (cp->id == ppp->echo_id)
+ ppp->last_pong = jiffies;
+ goto out;
+
+ case LCP_DISC_REQ: /* discard */
+ goto out;
+ }
+
+ /* LCP, IPCP and IPV6CP */
+ switch (cp->code) {
+ case CP_CONF_REQ:
+ ppp_cp_parse_cr(dev, pid, cp->id, len, skb->data);
+ break;
+
+ case CP_CONF_ACK:
+ if (cp->id == proto->cr_id)
+ ppp_cp_event(dev, pid, RCA, 0, 0, 0, NULL);
+ break;
+
+ case CP_CONF_REJ:
+ case CP_CONF_NAK:
+ if (cp->id == proto->cr_id)
+ ppp_cp_event(dev, pid, RCN, 0, 0, 0, NULL);
+ break;
+
+ case CP_TERM_REQ:
+ ppp_cp_event(dev, pid, RTR, 0, cp->id, 0, NULL);
+ break;
+
+ case CP_TERM_ACK:
+ ppp_cp_event(dev, pid, RTA, 0, 0, 0, NULL);
+ break;
+
+ case CP_CODE_REJ:
+ ppp_cp_event(dev, pid, RXJ_BAD, 0, 0, 0, NULL);
+ break;
+
+ default:
+ len += sizeof(struct cp_header);
+ if (len > dev->mtu)
+ len = dev->mtu;
+ ppp_cp_event(dev, pid, RUC, 0, 0, len, cp);
+ break;
+ }
+ goto out;
+
+rx_error:
+ dev->stats.rx_errors++;
+out:
+ spin_unlock_irqrestore(&ppp->lock, flags);
+ dev_kfree_skb_any(skb);
+ ppp_tx_flush();
+ return NET_RX_DROP;
+}
+
+static void ppp_timer(struct timer_list *t)
+{
+ struct proto *proto = from_timer(proto, t, timer);
+ struct ppp *ppp = get_ppp(proto->dev);
+ unsigned long flags;
+
+ spin_lock_irqsave(&ppp->lock, flags);
+ /* mod_timer could be called after we entered this function but
+ * before we got the lock.
+ */
+ if (timer_pending(&proto->timer)) {
+ spin_unlock_irqrestore(&ppp->lock, flags);
+ return;
+ }
+ switch (proto->state) {
+ case STOPPING:
+ case REQ_SENT:
+ case ACK_RECV:
+ case ACK_SENT:
+ if (proto->restart_counter) {
+ ppp_cp_event(proto->dev, proto->pid, TO_GOOD, 0, 0,
+ 0, NULL);
+ proto->restart_counter--;
+ } else if (netif_carrier_ok(proto->dev))
+ ppp_cp_event(proto->dev, proto->pid, TO_GOOD, 0, 0,
+ 0, NULL);
+ else
+ ppp_cp_event(proto->dev, proto->pid, TO_BAD, 0, 0,
+ 0, NULL);
+ break;
+
+ case OPENED:
+ if (proto->pid != PID_LCP)
+ break;
+ if (time_after(jiffies, ppp->last_pong +
+ ppp->keepalive_timeout * HZ)) {
+ netdev_info(proto->dev, "Link down\n");
+ ppp_cp_event(proto->dev, PID_LCP, STOP, 0, 0, 0, NULL);
+ ppp_cp_event(proto->dev, PID_LCP, START, 0, 0, 0, NULL);
+ } else { /* send keep-alive packet */
+ ppp->echo_id = ++ppp->seq;
+ ppp_tx_cp(proto->dev, PID_LCP, LCP_ECHO_REQ,
+ ppp->echo_id, 0, NULL);
+ proto->timer.expires = jiffies +
+ ppp->keepalive_interval * HZ;
+ add_timer(&proto->timer);
+ }
+ break;
+ }
+ spin_unlock_irqrestore(&ppp->lock, flags);
+ ppp_tx_flush();
+}
+
+static void ppp_start(struct net_device *dev)
+{
+ struct ppp *ppp = get_ppp(dev);
+ int i;
+
+ for (i = 0; i < IDX_COUNT; i++) {
+ struct proto *proto = &ppp->protos[i];
+
+ proto->dev = dev;
+ timer_setup(&proto->timer, ppp_timer, 0);
+ proto->state = CLOSED;
+ }
+ ppp->protos[IDX_LCP].pid = PID_LCP;
+ ppp->protos[IDX_IPCP].pid = PID_IPCP;
+ ppp->protos[IDX_IPV6CP].pid = PID_IPV6CP;
+
+ ppp_cp_event(dev, PID_LCP, START, 0, 0, 0, NULL);
+}
+
+static void ppp_stop(struct net_device *dev)
+{
+ ppp_cp_event(dev, PID_LCP, STOP, 0, 0, 0, NULL);
+}
+
+static void ppp_close(struct net_device *dev)
+{
+ ppp_tx_flush();
+}
+
+static struct hdlc_proto proto = {
+ .start = ppp_start,
+ .stop = ppp_stop,
+ .close = ppp_close,
+ .type_trans = ppp_type_trans,
+ .ioctl = ppp_ioctl,
+ .netif_rx = ppp_rx,
+ .module = THIS_MODULE,
+};
+
+static const struct header_ops ppp_header_ops = {
+ .create = ppp_hard_header,
+};
+
+static int ppp_ioctl(struct net_device *dev, struct if_settings *ifs)
+{
+ hdlc_device *hdlc = dev_to_hdlc(dev);
+ struct ppp *ppp;
+ int result;
+
+ switch (ifs->type) {
+ case IF_GET_PROTO:
+ if (dev_to_hdlc(dev)->proto != &proto)
+ return -EINVAL;
+ ifs->type = IF_PROTO_PPP;
+ return 0; /* return protocol only, no settable parameters */
+
+ case IF_PROTO_PPP:
+ if (!capable(CAP_NET_ADMIN))
+ return -EPERM;
+
+ if (dev->flags & IFF_UP)
+ return -EBUSY;
+
+ /* no settable parameters */
+
+ result = hdlc->attach(dev, ENCODING_NRZ,
+ PARITY_CRC16_PR1_CCITT);
+ if (result)
+ return result;
+
+ result = attach_hdlc_protocol(dev, &proto, sizeof(struct ppp));
+ if (result)
+ return result;
+
+ ppp = get_ppp(dev);
+ spin_lock_init(&ppp->lock);
+ ppp->req_timeout = 2;
+ ppp->cr_retries = 10;
+ ppp->term_retries = 2;
+ ppp->keepalive_interval = 10;
+ ppp->keepalive_timeout = 60;
+
+ dev->hard_header_len = sizeof(struct hdlc_header);
+ dev->header_ops = &ppp_header_ops;
+ dev->type = ARPHRD_PPP;
+ call_netdevice_notifiers(NETDEV_POST_TYPE_CHANGE, dev);
+ netif_dormant_on(dev);
+ return 0;
+ }
+
+ return -EINVAL;
+}
+
+static int __init hdlc_ppp_init(void)
+{
+ skb_queue_head_init(&tx_queue);
+ register_hdlc_protocol(&proto);
+ return 0;
+}
+
+static void __exit hdlc_ppp_exit(void)
+{
+ unregister_hdlc_protocol(&proto);
+}
+
+module_init(hdlc_ppp_init);
+module_exit(hdlc_ppp_exit);
+
+MODULE_AUTHOR("Krzysztof Halasa <khc@pm.waw.pl>");
+MODULE_DESCRIPTION("PPP protocol support for generic HDLC");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/net/wan/hdlc_raw.c b/drivers/net/wan/hdlc_raw.c
new file mode 100644
index 000000000..4a2f06872
--- /dev/null
+++ b/drivers/net/wan/hdlc_raw.c
@@ -0,0 +1,112 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Generic HDLC support routines for Linux
+ * HDLC support
+ *
+ * Copyright (C) 1999 - 2006 Krzysztof Halasa <khc@pm.waw.pl>
+ */
+
+#include <linux/errno.h>
+#include <linux/hdlc.h>
+#include <linux/if_arp.h>
+#include <linux/inetdevice.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/pkt_sched.h>
+#include <linux/poll.h>
+#include <linux/rtnetlink.h>
+#include <linux/skbuff.h>
+
+
+static int raw_ioctl(struct net_device *dev, struct if_settings *ifs);
+
+static __be16 raw_type_trans(struct sk_buff *skb, struct net_device *dev)
+{
+ return cpu_to_be16(ETH_P_IP);
+}
+
+static struct hdlc_proto proto = {
+ .type_trans = raw_type_trans,
+ .ioctl = raw_ioctl,
+ .module = THIS_MODULE,
+};
+
+
+static int raw_ioctl(struct net_device *dev, struct if_settings *ifs)
+{
+ raw_hdlc_proto __user *raw_s = ifs->ifs_ifsu.raw_hdlc;
+ const size_t size = sizeof(raw_hdlc_proto);
+ raw_hdlc_proto new_settings;
+ hdlc_device *hdlc = dev_to_hdlc(dev);
+ int result;
+
+ switch (ifs->type) {
+ case IF_GET_PROTO:
+ if (dev_to_hdlc(dev)->proto != &proto)
+ return -EINVAL;
+ ifs->type = IF_PROTO_HDLC;
+ if (ifs->size < size) {
+ ifs->size = size; /* data size wanted */
+ return -ENOBUFS;
+ }
+ if (copy_to_user(raw_s, hdlc->state, size))
+ return -EFAULT;
+ return 0;
+
+ case IF_PROTO_HDLC:
+ if (!capable(CAP_NET_ADMIN))
+ return -EPERM;
+
+ if (dev->flags & IFF_UP)
+ return -EBUSY;
+
+ if (copy_from_user(&new_settings, raw_s, size))
+ return -EFAULT;
+
+ if (new_settings.encoding == ENCODING_DEFAULT)
+ new_settings.encoding = ENCODING_NRZ;
+
+ if (new_settings.parity == PARITY_DEFAULT)
+ new_settings.parity = PARITY_CRC16_PR1_CCITT;
+
+ result = hdlc->attach(dev, new_settings.encoding,
+ new_settings.parity);
+ if (result)
+ return result;
+
+ result = attach_hdlc_protocol(dev, &proto,
+ sizeof(raw_hdlc_proto));
+ if (result)
+ return result;
+ memcpy(hdlc->state, &new_settings, size);
+ dev->type = ARPHRD_RAWHDLC;
+ call_netdevice_notifiers(NETDEV_POST_TYPE_CHANGE, dev);
+ netif_dormant_off(dev);
+ return 0;
+ }
+
+ return -EINVAL;
+}
+
+
+static int __init hdlc_raw_init(void)
+{
+ register_hdlc_protocol(&proto);
+ return 0;
+}
+
+
+
+static void __exit hdlc_raw_exit(void)
+{
+ unregister_hdlc_protocol(&proto);
+}
+
+
+module_init(hdlc_raw_init);
+module_exit(hdlc_raw_exit);
+
+MODULE_AUTHOR("Krzysztof Halasa <khc@pm.waw.pl>");
+MODULE_DESCRIPTION("Raw HDLC protocol support for generic HDLC");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/net/wan/hdlc_raw_eth.c b/drivers/net/wan/hdlc_raw_eth.c
new file mode 100644
index 000000000..0a66b7356
--- /dev/null
+++ b/drivers/net/wan/hdlc_raw_eth.c
@@ -0,0 +1,132 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Generic HDLC support routines for Linux
+ * HDLC Ethernet emulation support
+ *
+ * Copyright (C) 2002-2006 Krzysztof Halasa <khc@pm.waw.pl>
+ */
+
+#include <linux/errno.h>
+#include <linux/etherdevice.h>
+#include <linux/gfp.h>
+#include <linux/hdlc.h>
+#include <linux/if_arp.h>
+#include <linux/inetdevice.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/pkt_sched.h>
+#include <linux/poll.h>
+#include <linux/rtnetlink.h>
+#include <linux/skbuff.h>
+
+static int raw_eth_ioctl(struct net_device *dev, struct if_settings *ifs);
+
+static netdev_tx_t eth_tx(struct sk_buff *skb, struct net_device *dev)
+{
+ int pad = ETH_ZLEN - skb->len;
+ if (pad > 0) { /* Pad the frame with zeros */
+ int len = skb->len;
+ if (skb_tailroom(skb) < pad)
+ if (pskb_expand_head(skb, 0, pad, GFP_ATOMIC)) {
+ dev->stats.tx_dropped++;
+ dev_kfree_skb(skb);
+ return 0;
+ }
+ skb_put(skb, pad);
+ memset(skb->data + len, 0, pad);
+ }
+ return dev_to_hdlc(dev)->xmit(skb, dev);
+}
+
+
+static struct hdlc_proto proto = {
+ .type_trans = eth_type_trans,
+ .xmit = eth_tx,
+ .ioctl = raw_eth_ioctl,
+ .module = THIS_MODULE,
+};
+
+
+static int raw_eth_ioctl(struct net_device *dev, struct if_settings *ifs)
+{
+ raw_hdlc_proto __user *raw_s = ifs->ifs_ifsu.raw_hdlc;
+ const size_t size = sizeof(raw_hdlc_proto);
+ raw_hdlc_proto new_settings;
+ hdlc_device *hdlc = dev_to_hdlc(dev);
+ unsigned int old_qlen;
+ int result;
+
+ switch (ifs->type) {
+ case IF_GET_PROTO:
+ if (dev_to_hdlc(dev)->proto != &proto)
+ return -EINVAL;
+ ifs->type = IF_PROTO_HDLC_ETH;
+ if (ifs->size < size) {
+ ifs->size = size; /* data size wanted */
+ return -ENOBUFS;
+ }
+ if (copy_to_user(raw_s, hdlc->state, size))
+ return -EFAULT;
+ return 0;
+
+ case IF_PROTO_HDLC_ETH:
+ if (!capable(CAP_NET_ADMIN))
+ return -EPERM;
+
+ if (dev->flags & IFF_UP)
+ return -EBUSY;
+
+ if (copy_from_user(&new_settings, raw_s, size))
+ return -EFAULT;
+
+ if (new_settings.encoding == ENCODING_DEFAULT)
+ new_settings.encoding = ENCODING_NRZ;
+
+ if (new_settings.parity == PARITY_DEFAULT)
+ new_settings.parity = PARITY_CRC16_PR1_CCITT;
+
+ result = hdlc->attach(dev, new_settings.encoding,
+ new_settings.parity);
+ if (result)
+ return result;
+
+ result = attach_hdlc_protocol(dev, &proto,
+ sizeof(raw_hdlc_proto));
+ if (result)
+ return result;
+ memcpy(hdlc->state, &new_settings, size);
+ old_qlen = dev->tx_queue_len;
+ ether_setup(dev);
+ dev->tx_queue_len = old_qlen;
+ dev->priv_flags &= ~IFF_TX_SKB_SHARING;
+ eth_hw_addr_random(dev);
+ call_netdevice_notifiers(NETDEV_POST_TYPE_CHANGE, dev);
+ netif_dormant_off(dev);
+ return 0;
+ }
+
+ return -EINVAL;
+}
+
+
+static int __init hdlc_eth_init(void)
+{
+ register_hdlc_protocol(&proto);
+ return 0;
+}
+
+
+
+static void __exit hdlc_eth_exit(void)
+{
+ unregister_hdlc_protocol(&proto);
+}
+
+
+module_init(hdlc_eth_init);
+module_exit(hdlc_eth_exit);
+
+MODULE_AUTHOR("Krzysztof Halasa <khc@pm.waw.pl>");
+MODULE_DESCRIPTION("Ethernet encapsulation support for generic HDLC");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/net/wan/hdlc_x25.c b/drivers/net/wan/hdlc_x25.c
new file mode 100644
index 000000000..f72c92c24
--- /dev/null
+++ b/drivers/net/wan/hdlc_x25.c
@@ -0,0 +1,384 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Generic HDLC support routines for Linux
+ * X.25 support
+ *
+ * Copyright (C) 1999 - 2006 Krzysztof Halasa <khc@pm.waw.pl>
+ */
+
+#include <linux/errno.h>
+#include <linux/gfp.h>
+#include <linux/hdlc.h>
+#include <linux/if_arp.h>
+#include <linux/inetdevice.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/lapb.h>
+#include <linux/module.h>
+#include <linux/pkt_sched.h>
+#include <linux/poll.h>
+#include <linux/rtnetlink.h>
+#include <linux/skbuff.h>
+#include <net/x25device.h>
+
+struct x25_state {
+ x25_hdlc_proto settings;
+ bool up;
+ spinlock_t up_lock; /* Protects "up" */
+ struct sk_buff_head rx_queue;
+ struct tasklet_struct rx_tasklet;
+};
+
+static int x25_ioctl(struct net_device *dev, struct if_settings *ifs);
+
+static struct x25_state *state(hdlc_device *hdlc)
+{
+ return hdlc->state;
+}
+
+static void x25_rx_queue_kick(struct tasklet_struct *t)
+{
+ struct x25_state *x25st = from_tasklet(x25st, t, rx_tasklet);
+ struct sk_buff *skb = skb_dequeue(&x25st->rx_queue);
+
+ while (skb) {
+ netif_receive_skb_core(skb);
+ skb = skb_dequeue(&x25st->rx_queue);
+ }
+}
+
+/* These functions are callbacks called by LAPB layer */
+
+static void x25_connect_disconnect(struct net_device *dev, int reason, int code)
+{
+ struct x25_state *x25st = state(dev_to_hdlc(dev));
+ struct sk_buff *skb;
+ unsigned char *ptr;
+
+ skb = __dev_alloc_skb(1, GFP_ATOMIC | __GFP_NOMEMALLOC);
+ if (!skb)
+ return;
+
+ ptr = skb_put(skb, 1);
+ *ptr = code;
+
+ skb->protocol = x25_type_trans(skb, dev);
+
+ skb_queue_tail(&x25st->rx_queue, skb);
+ tasklet_schedule(&x25st->rx_tasklet);
+}
+
+static void x25_connected(struct net_device *dev, int reason)
+{
+ x25_connect_disconnect(dev, reason, X25_IFACE_CONNECT);
+}
+
+static void x25_disconnected(struct net_device *dev, int reason)
+{
+ x25_connect_disconnect(dev, reason, X25_IFACE_DISCONNECT);
+}
+
+static int x25_data_indication(struct net_device *dev, struct sk_buff *skb)
+{
+ struct x25_state *x25st = state(dev_to_hdlc(dev));
+ unsigned char *ptr;
+
+ if (skb_cow(skb, 1)) {
+ kfree_skb(skb);
+ return NET_RX_DROP;
+ }
+
+ skb_push(skb, 1);
+
+ ptr = skb->data;
+ *ptr = X25_IFACE_DATA;
+
+ skb->protocol = x25_type_trans(skb, dev);
+
+ skb_queue_tail(&x25st->rx_queue, skb);
+ tasklet_schedule(&x25st->rx_tasklet);
+ return NET_RX_SUCCESS;
+}
+
+static void x25_data_transmit(struct net_device *dev, struct sk_buff *skb)
+{
+ hdlc_device *hdlc = dev_to_hdlc(dev);
+
+ skb_reset_network_header(skb);
+ skb->protocol = hdlc_type_trans(skb, dev);
+
+ if (dev_nit_active(dev))
+ dev_queue_xmit_nit(skb, dev);
+
+ hdlc->xmit(skb, dev); /* Ignore return value :-( */
+}
+
+static netdev_tx_t x25_xmit(struct sk_buff *skb, struct net_device *dev)
+{
+ hdlc_device *hdlc = dev_to_hdlc(dev);
+ struct x25_state *x25st = state(hdlc);
+ int result;
+
+ /* There should be a pseudo header of 1 byte added by upper layers.
+ * Check to make sure it is there before reading it.
+ */
+ if (skb->len < 1) {
+ kfree_skb(skb);
+ return NETDEV_TX_OK;
+ }
+
+ spin_lock_bh(&x25st->up_lock);
+ if (!x25st->up) {
+ spin_unlock_bh(&x25st->up_lock);
+ kfree_skb(skb);
+ return NETDEV_TX_OK;
+ }
+
+ switch (skb->data[0]) {
+ case X25_IFACE_DATA: /* Data to be transmitted */
+ skb_pull(skb, 1);
+ result = lapb_data_request(dev, skb);
+ if (result != LAPB_OK)
+ dev_kfree_skb(skb);
+ spin_unlock_bh(&x25st->up_lock);
+ return NETDEV_TX_OK;
+
+ case X25_IFACE_CONNECT:
+ result = lapb_connect_request(dev);
+ if (result != LAPB_OK) {
+ if (result == LAPB_CONNECTED)
+ /* Send connect confirm. msg to level 3 */
+ x25_connected(dev, 0);
+ else
+ netdev_err(dev, "LAPB connect request failed, error code = %i\n",
+ result);
+ }
+ break;
+
+ case X25_IFACE_DISCONNECT:
+ result = lapb_disconnect_request(dev);
+ if (result != LAPB_OK) {
+ if (result == LAPB_NOTCONNECTED)
+ /* Send disconnect confirm. msg to level 3 */
+ x25_disconnected(dev, 0);
+ else
+ netdev_err(dev, "LAPB disconnect request failed, error code = %i\n",
+ result);
+ }
+ break;
+
+ default: /* to be defined */
+ break;
+ }
+
+ spin_unlock_bh(&x25st->up_lock);
+ dev_kfree_skb(skb);
+ return NETDEV_TX_OK;
+}
+
+static int x25_open(struct net_device *dev)
+{
+ static const struct lapb_register_struct cb = {
+ .connect_confirmation = x25_connected,
+ .connect_indication = x25_connected,
+ .disconnect_confirmation = x25_disconnected,
+ .disconnect_indication = x25_disconnected,
+ .data_indication = x25_data_indication,
+ .data_transmit = x25_data_transmit,
+ };
+ hdlc_device *hdlc = dev_to_hdlc(dev);
+ struct x25_state *x25st = state(hdlc);
+ struct lapb_parms_struct params;
+ int result;
+
+ result = lapb_register(dev, &cb);
+ if (result != LAPB_OK)
+ return -ENOMEM;
+
+ result = lapb_getparms(dev, &params);
+ if (result != LAPB_OK)
+ return -EINVAL;
+
+ if (state(hdlc)->settings.dce)
+ params.mode = params.mode | LAPB_DCE;
+
+ if (state(hdlc)->settings.modulo == 128)
+ params.mode = params.mode | LAPB_EXTENDED;
+
+ params.window = state(hdlc)->settings.window;
+ params.t1 = state(hdlc)->settings.t1;
+ params.t2 = state(hdlc)->settings.t2;
+ params.n2 = state(hdlc)->settings.n2;
+
+ result = lapb_setparms(dev, &params);
+ if (result != LAPB_OK)
+ return -EINVAL;
+
+ spin_lock_bh(&x25st->up_lock);
+ x25st->up = true;
+ spin_unlock_bh(&x25st->up_lock);
+
+ return 0;
+}
+
+static void x25_close(struct net_device *dev)
+{
+ hdlc_device *hdlc = dev_to_hdlc(dev);
+ struct x25_state *x25st = state(hdlc);
+
+ spin_lock_bh(&x25st->up_lock);
+ x25st->up = false;
+ spin_unlock_bh(&x25st->up_lock);
+
+ lapb_unregister(dev);
+ tasklet_kill(&x25st->rx_tasklet);
+}
+
+static int x25_rx(struct sk_buff *skb)
+{
+ struct net_device *dev = skb->dev;
+ hdlc_device *hdlc = dev_to_hdlc(dev);
+ struct x25_state *x25st = state(hdlc);
+
+ skb = skb_share_check(skb, GFP_ATOMIC);
+ if (!skb) {
+ dev->stats.rx_dropped++;
+ return NET_RX_DROP;
+ }
+
+ spin_lock_bh(&x25st->up_lock);
+ if (!x25st->up) {
+ spin_unlock_bh(&x25st->up_lock);
+ kfree_skb(skb);
+ dev->stats.rx_dropped++;
+ return NET_RX_DROP;
+ }
+
+ if (lapb_data_received(dev, skb) == LAPB_OK) {
+ spin_unlock_bh(&x25st->up_lock);
+ return NET_RX_SUCCESS;
+ }
+
+ spin_unlock_bh(&x25st->up_lock);
+ dev->stats.rx_errors++;
+ dev_kfree_skb_any(skb);
+ return NET_RX_DROP;
+}
+
+static struct hdlc_proto proto = {
+ .open = x25_open,
+ .close = x25_close,
+ .ioctl = x25_ioctl,
+ .netif_rx = x25_rx,
+ .xmit = x25_xmit,
+ .module = THIS_MODULE,
+};
+
+static int x25_ioctl(struct net_device *dev, struct if_settings *ifs)
+{
+ x25_hdlc_proto __user *x25_s = ifs->ifs_ifsu.x25;
+ const size_t size = sizeof(x25_hdlc_proto);
+ hdlc_device *hdlc = dev_to_hdlc(dev);
+ x25_hdlc_proto new_settings;
+ int result;
+
+ switch (ifs->type) {
+ case IF_GET_PROTO:
+ if (dev_to_hdlc(dev)->proto != &proto)
+ return -EINVAL;
+ ifs->type = IF_PROTO_X25;
+ if (ifs->size < size) {
+ ifs->size = size; /* data size wanted */
+ return -ENOBUFS;
+ }
+ if (copy_to_user(x25_s, &state(hdlc)->settings, size))
+ return -EFAULT;
+ return 0;
+
+ case IF_PROTO_X25:
+ if (!capable(CAP_NET_ADMIN))
+ return -EPERM;
+
+ if (dev->flags & IFF_UP)
+ return -EBUSY;
+
+ /* backward compatibility */
+ if (ifs->size == 0) {
+ new_settings.dce = 0;
+ new_settings.modulo = 8;
+ new_settings.window = 7;
+ new_settings.t1 = 3;
+ new_settings.t2 = 1;
+ new_settings.n2 = 10;
+ } else {
+ if (copy_from_user(&new_settings, x25_s, size))
+ return -EFAULT;
+
+ if ((new_settings.dce != 0 &&
+ new_settings.dce != 1) ||
+ (new_settings.modulo != 8 &&
+ new_settings.modulo != 128) ||
+ new_settings.window < 1 ||
+ (new_settings.modulo == 8 &&
+ new_settings.window > 7) ||
+ (new_settings.modulo == 128 &&
+ new_settings.window > 127) ||
+ new_settings.t1 < 1 ||
+ new_settings.t1 > 255 ||
+ new_settings.t2 < 1 ||
+ new_settings.t2 > 255 ||
+ new_settings.n2 < 1 ||
+ new_settings.n2 > 255)
+ return -EINVAL;
+ }
+
+ result = hdlc->attach(dev, ENCODING_NRZ,
+ PARITY_CRC16_PR1_CCITT);
+ if (result)
+ return result;
+
+ result = attach_hdlc_protocol(dev, &proto,
+ sizeof(struct x25_state));
+ if (result)
+ return result;
+
+ memcpy(&state(hdlc)->settings, &new_settings, size);
+ state(hdlc)->up = false;
+ spin_lock_init(&state(hdlc)->up_lock);
+ skb_queue_head_init(&state(hdlc)->rx_queue);
+ tasklet_setup(&state(hdlc)->rx_tasklet, x25_rx_queue_kick);
+
+ /* There's no header_ops so hard_header_len should be 0. */
+ dev->hard_header_len = 0;
+ /* When transmitting data:
+ * first we'll remove a pseudo header of 1 byte,
+ * then we'll prepend an LAPB header of at most 3 bytes.
+ */
+ dev->needed_headroom = 3 - 1;
+
+ dev->type = ARPHRD_X25;
+ call_netdevice_notifiers(NETDEV_POST_TYPE_CHANGE, dev);
+ netif_dormant_off(dev);
+ return 0;
+ }
+
+ return -EINVAL;
+}
+
+static int __init hdlc_x25_init(void)
+{
+ register_hdlc_protocol(&proto);
+ return 0;
+}
+
+static void __exit hdlc_x25_exit(void)
+{
+ unregister_hdlc_protocol(&proto);
+}
+
+module_init(hdlc_x25_init);
+module_exit(hdlc_x25_exit);
+
+MODULE_AUTHOR("Krzysztof Halasa <khc@pm.waw.pl>");
+MODULE_DESCRIPTION("X.25 protocol support for generic HDLC");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/net/wan/ixp4xx_hss.c b/drivers/net/wan/ixp4xx_hss.c
new file mode 100644
index 000000000..e46b7f5ee
--- /dev/null
+++ b/drivers/net/wan/ixp4xx_hss.c
@@ -0,0 +1,1545 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Intel IXP4xx HSS (synchronous serial port) driver for Linux
+ *
+ * Copyright (C) 2007-2008 Krzysztof Hałasa <khc@pm.waw.pl>
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/module.h>
+#include <linux/bitops.h>
+#include <linux/cdev.h>
+#include <linux/dma-mapping.h>
+#include <linux/dmapool.h>
+#include <linux/fs.h>
+#include <linux/hdlc.h>
+#include <linux/io.h>
+#include <linux/kernel.h>
+#include <linux/mfd/syscon.h>
+#include <linux/platform_device.h>
+#include <linux/poll.h>
+#include <linux/regmap.h>
+#include <linux/slab.h>
+#include <linux/gpio/consumer.h>
+#include <linux/of.h>
+#include <linux/soc/ixp4xx/npe.h>
+#include <linux/soc/ixp4xx/qmgr.h>
+#include <linux/soc/ixp4xx/cpu.h>
+
+/* This is what all IXP4xx platforms we know uses, if more frequencies
+ * are needed, we need to migrate to the clock framework.
+ */
+#define IXP4XX_TIMER_FREQ 66666000
+
+#define DEBUG_DESC 0
+#define DEBUG_RX 0
+#define DEBUG_TX 0
+#define DEBUG_PKT_BYTES 0
+#define DEBUG_CLOSE 0
+
+#define DRV_NAME "ixp4xx_hss"
+
+#define PKT_EXTRA_FLAGS 0 /* orig 1 */
+#define PKT_NUM_PIPES 1 /* 1, 2 or 4 */
+#define PKT_PIPE_FIFO_SIZEW 4 /* total 4 dwords per HSS */
+
+#define RX_DESCS 16 /* also length of all RX queues */
+#define TX_DESCS 16 /* also length of all TX queues */
+
+#define POOL_ALLOC_SIZE (sizeof(struct desc) * (RX_DESCS + TX_DESCS))
+#define RX_SIZE (HDLC_MAX_MRU + 4) /* NPE needs more space */
+#define MAX_CLOSE_WAIT 1000 /* microseconds */
+#define HSS_COUNT 2
+#define FRAME_SIZE 256 /* doesn't matter at this point */
+#define FRAME_OFFSET 0
+#define MAX_CHANNELS (FRAME_SIZE / 8)
+
+#define NAPI_WEIGHT 16
+
+/* Queue IDs */
+#define HSS0_PKT_RX_QUEUE 13 /* orig size = 32 dwords */
+#define HSS0_PKT_TX0_QUEUE 14 /* orig size = 16 dwords */
+#define HSS0_PKT_TX1_QUEUE 15
+#define HSS0_PKT_TX2_QUEUE 16
+#define HSS0_PKT_TX3_QUEUE 17
+#define HSS0_PKT_RXFREE0_QUEUE 18 /* orig size = 16 dwords */
+#define HSS0_PKT_RXFREE1_QUEUE 19
+#define HSS0_PKT_RXFREE2_QUEUE 20
+#define HSS0_PKT_RXFREE3_QUEUE 21
+#define HSS0_PKT_TXDONE_QUEUE 22 /* orig size = 64 dwords */
+
+#define HSS1_PKT_RX_QUEUE 0
+#define HSS1_PKT_TX0_QUEUE 5
+#define HSS1_PKT_TX1_QUEUE 6
+#define HSS1_PKT_TX2_QUEUE 7
+#define HSS1_PKT_TX3_QUEUE 8
+#define HSS1_PKT_RXFREE0_QUEUE 1
+#define HSS1_PKT_RXFREE1_QUEUE 2
+#define HSS1_PKT_RXFREE2_QUEUE 3
+#define HSS1_PKT_RXFREE3_QUEUE 4
+#define HSS1_PKT_TXDONE_QUEUE 9
+
+#define NPE_PKT_MODE_HDLC 0
+#define NPE_PKT_MODE_RAW 1
+#define NPE_PKT_MODE_56KMODE 2
+#define NPE_PKT_MODE_56KENDIAN_MSB 4
+
+/* PKT_PIPE_HDLC_CFG_WRITE flags */
+#define PKT_HDLC_IDLE_ONES 0x1 /* default = flags */
+#define PKT_HDLC_CRC_32 0x2 /* default = CRC-16 */
+#define PKT_HDLC_MSB_ENDIAN 0x4 /* default = LE */
+
+/* hss_config, PCRs */
+/* Frame sync sampling, default = active low */
+#define PCR_FRM_SYNC_ACTIVE_HIGH 0x40000000
+#define PCR_FRM_SYNC_FALLINGEDGE 0x80000000
+#define PCR_FRM_SYNC_RISINGEDGE 0xC0000000
+
+/* Frame sync pin: input (default) or output generated off a given clk edge */
+#define PCR_FRM_SYNC_OUTPUT_FALLING 0x20000000
+#define PCR_FRM_SYNC_OUTPUT_RISING 0x30000000
+
+/* Frame and data clock sampling on edge, default = falling */
+#define PCR_FCLK_EDGE_RISING 0x08000000
+#define PCR_DCLK_EDGE_RISING 0x04000000
+
+/* Clock direction, default = input */
+#define PCR_SYNC_CLK_DIR_OUTPUT 0x02000000
+
+/* Generate/Receive frame pulses, default = enabled */
+#define PCR_FRM_PULSE_DISABLED 0x01000000
+
+ /* Data rate is full (default) or half the configured clk speed */
+#define PCR_HALF_CLK_RATE 0x00200000
+
+/* Invert data between NPE and HSS FIFOs? (default = no) */
+#define PCR_DATA_POLARITY_INVERT 0x00100000
+
+/* TX/RX endianness, default = LSB */
+#define PCR_MSB_ENDIAN 0x00080000
+
+/* Normal (default) / open drain mode (TX only) */
+#define PCR_TX_PINS_OPEN_DRAIN 0x00040000
+
+/* No framing bit transmitted and expected on RX? (default = framing bit) */
+#define PCR_SOF_NO_FBIT 0x00020000
+
+/* Drive data pins? */
+#define PCR_TX_DATA_ENABLE 0x00010000
+
+/* Voice 56k type: drive the data pins low (default), high, high Z */
+#define PCR_TX_V56K_HIGH 0x00002000
+#define PCR_TX_V56K_HIGH_IMP 0x00004000
+
+/* Unassigned type: drive the data pins low (default), high, high Z */
+#define PCR_TX_UNASS_HIGH 0x00000800
+#define PCR_TX_UNASS_HIGH_IMP 0x00001000
+
+/* T1 @ 1.544MHz only: Fbit dictated in FIFO (default) or high Z */
+#define PCR_TX_FB_HIGH_IMP 0x00000400
+
+/* 56k data endiannes - which bit unused: high (default) or low */
+#define PCR_TX_56KE_BIT_0_UNUSED 0x00000200
+
+/* 56k data transmission type: 32/8 bit data (default) or 56K data */
+#define PCR_TX_56KS_56K_DATA 0x00000100
+
+/* hss_config, cCR */
+/* Number of packetized clients, default = 1 */
+#define CCR_NPE_HFIFO_2_HDLC 0x04000000
+#define CCR_NPE_HFIFO_3_OR_4HDLC 0x08000000
+
+/* default = no loopback */
+#define CCR_LOOPBACK 0x02000000
+
+/* HSS number, default = 0 (first) */
+#define CCR_SECOND_HSS 0x01000000
+
+/* hss_config, clkCR: main:10, num:10, denom:12 */
+#define CLK42X_SPEED_EXP ((0x3FF << 22) | (2 << 12) | 15) /*65 KHz*/
+
+#define CLK42X_SPEED_512KHZ ((130 << 22) | (2 << 12) | 15)
+#define CLK42X_SPEED_1536KHZ ((43 << 22) | (18 << 12) | 47)
+#define CLK42X_SPEED_1544KHZ ((43 << 22) | (33 << 12) | 192)
+#define CLK42X_SPEED_2048KHZ ((32 << 22) | (34 << 12) | 63)
+#define CLK42X_SPEED_4096KHZ ((16 << 22) | (34 << 12) | 127)
+#define CLK42X_SPEED_8192KHZ ((8 << 22) | (34 << 12) | 255)
+
+#define CLK46X_SPEED_512KHZ ((130 << 22) | (24 << 12) | 127)
+#define CLK46X_SPEED_1536KHZ ((43 << 22) | (152 << 12) | 383)
+#define CLK46X_SPEED_1544KHZ ((43 << 22) | (66 << 12) | 385)
+#define CLK46X_SPEED_2048KHZ ((32 << 22) | (280 << 12) | 511)
+#define CLK46X_SPEED_4096KHZ ((16 << 22) | (280 << 12) | 1023)
+#define CLK46X_SPEED_8192KHZ ((8 << 22) | (280 << 12) | 2047)
+
+/* HSS_CONFIG_CLOCK_CR register consists of 3 parts:
+ * A (10 bits), B (10 bits) and C (12 bits).
+ * IXP42x HSS clock generator operation (verified with an oscilloscope):
+ * Each clock bit takes 7.5 ns (1 / 133.xx MHz).
+ * The clock sequence consists of (C - B) states of 0s and 1s, each state is
+ * A bits wide. It's followed by (B + 1) states of 0s and 1s, each state is
+ * (A + 1) bits wide.
+ *
+ * The resulting average clock frequency (assuming 33.333 MHz oscillator) is:
+ * freq = 66.666 MHz / (A + (B + 1) / (C + 1))
+ * minimum freq = 66.666 MHz / (A + 1)
+ * maximum freq = 66.666 MHz / A
+ *
+ * Example: A = 2, B = 2, C = 7, CLOCK_CR register = 2 << 22 | 2 << 12 | 7
+ * freq = 66.666 MHz / (2 + (2 + 1) / (7 + 1)) = 28.07 MHz (Mb/s).
+ * The clock sequence is: 1100110011 (5 doubles) 000111000 (3 triples).
+ * The sequence takes (C - B) * A + (B + 1) * (A + 1) = 5 * 2 + 3 * 3 bits
+ * = 19 bits (each 7.5 ns long) = 142.5 ns (then the sequence repeats).
+ * The sequence consists of 4 complete clock periods, thus the average
+ * frequency (= clock rate) is 4 / 142.5 ns = 28.07 MHz (Mb/s).
+ * (max specified clock rate for IXP42x HSS is 8.192 Mb/s).
+ */
+
+/* hss_config, LUT entries */
+#define TDMMAP_UNASSIGNED 0
+#define TDMMAP_HDLC 1 /* HDLC - packetized */
+#define TDMMAP_VOICE56K 2 /* Voice56K - 7-bit channelized */
+#define TDMMAP_VOICE64K 3 /* Voice64K - 8-bit channelized */
+
+/* offsets into HSS config */
+#define HSS_CONFIG_TX_PCR 0x00 /* port configuration registers */
+#define HSS_CONFIG_RX_PCR 0x04
+#define HSS_CONFIG_CORE_CR 0x08 /* loopback control, HSS# */
+#define HSS_CONFIG_CLOCK_CR 0x0C /* clock generator control */
+#define HSS_CONFIG_TX_FCR 0x10 /* frame configuration registers */
+#define HSS_CONFIG_RX_FCR 0x14
+#define HSS_CONFIG_TX_LUT 0x18 /* channel look-up tables */
+#define HSS_CONFIG_RX_LUT 0x38
+
+/* NPE command codes */
+/* writes the ConfigWord value to the location specified by offset */
+#define PORT_CONFIG_WRITE 0x40
+
+/* triggers the NPE to load the contents of the configuration table */
+#define PORT_CONFIG_LOAD 0x41
+
+/* triggers the NPE to return an HssErrorReadResponse message */
+#define PORT_ERROR_READ 0x42
+
+/* triggers the NPE to reset internal status and enable the HssPacketized
+ * operation for the flow specified by pPipe
+ */
+#define PKT_PIPE_FLOW_ENABLE 0x50
+#define PKT_PIPE_FLOW_DISABLE 0x51
+#define PKT_NUM_PIPES_WRITE 0x52
+#define PKT_PIPE_FIFO_SIZEW_WRITE 0x53
+#define PKT_PIPE_HDLC_CFG_WRITE 0x54
+#define PKT_PIPE_IDLE_PATTERN_WRITE 0x55
+#define PKT_PIPE_RX_SIZE_WRITE 0x56
+#define PKT_PIPE_MODE_WRITE 0x57
+
+/* HDLC packet status values - desc->status */
+#define ERR_SHUTDOWN 1 /* stop or shutdown occurrence */
+#define ERR_HDLC_ALIGN 2 /* HDLC alignment error */
+#define ERR_HDLC_FCS 3 /* HDLC Frame Check Sum error */
+#define ERR_RXFREE_Q_EMPTY 4 /* RX-free queue became empty while receiving
+ * this packet (if buf_len < pkt_len)
+ */
+#define ERR_HDLC_TOO_LONG 5 /* HDLC frame size too long */
+#define ERR_HDLC_ABORT 6 /* abort sequence received */
+#define ERR_DISCONNECTING 7 /* disconnect is in progress */
+
+#ifdef __ARMEB__
+typedef struct sk_buff buffer_t;
+#define free_buffer dev_kfree_skb
+#define free_buffer_irq dev_consume_skb_irq
+#else
+typedef void buffer_t;
+#define free_buffer kfree
+#define free_buffer_irq kfree
+#endif
+
+struct port {
+ struct device *dev;
+ struct npe *npe;
+ unsigned int txreadyq;
+ unsigned int rxtrigq;
+ unsigned int rxfreeq;
+ unsigned int rxq;
+ unsigned int txq;
+ unsigned int txdoneq;
+ struct gpio_desc *cts;
+ struct gpio_desc *rts;
+ struct gpio_desc *dcd;
+ struct gpio_desc *dtr;
+ struct gpio_desc *clk_internal;
+ struct net_device *netdev;
+ struct napi_struct napi;
+ buffer_t *rx_buff_tab[RX_DESCS], *tx_buff_tab[TX_DESCS];
+ struct desc *desc_tab; /* coherent */
+ dma_addr_t desc_tab_phys;
+ unsigned int id;
+ unsigned int clock_type, clock_rate, loopback;
+ unsigned int initialized, carrier;
+ u8 hdlc_cfg;
+ u32 clock_reg;
+};
+
+/* NPE message structure */
+struct msg {
+#ifdef __ARMEB__
+ u8 cmd, unused, hss_port, index;
+ union {
+ struct { u8 data8a, data8b, data8c, data8d; };
+ struct { u16 data16a, data16b; };
+ struct { u32 data32; };
+ };
+#else
+ u8 index, hss_port, unused, cmd;
+ union {
+ struct { u8 data8d, data8c, data8b, data8a; };
+ struct { u16 data16b, data16a; };
+ struct { u32 data32; };
+ };
+#endif
+};
+
+/* HDLC packet descriptor */
+struct desc {
+ u32 next; /* pointer to next buffer, unused */
+
+#ifdef __ARMEB__
+ u16 buf_len; /* buffer length */
+ u16 pkt_len; /* packet length */
+ u32 data; /* pointer to data buffer in RAM */
+ u8 status;
+ u8 error_count;
+ u16 __reserved;
+#else
+ u16 pkt_len; /* packet length */
+ u16 buf_len; /* buffer length */
+ u32 data; /* pointer to data buffer in RAM */
+ u16 __reserved;
+ u8 error_count;
+ u8 status;
+#endif
+ u32 __reserved1[4];
+};
+
+#define rx_desc_phys(port, n) ((port)->desc_tab_phys + \
+ (n) * sizeof(struct desc))
+#define rx_desc_ptr(port, n) (&(port)->desc_tab[n])
+
+#define tx_desc_phys(port, n) ((port)->desc_tab_phys + \
+ ((n) + RX_DESCS) * sizeof(struct desc))
+#define tx_desc_ptr(port, n) (&(port)->desc_tab[(n) + RX_DESCS])
+
+/*****************************************************************************
+ * global variables
+ ****************************************************************************/
+
+static int ports_open;
+static struct dma_pool *dma_pool;
+static DEFINE_SPINLOCK(npe_lock);
+
+/*****************************************************************************
+ * utility functions
+ ****************************************************************************/
+
+static inline struct port *dev_to_port(struct net_device *dev)
+{
+ return dev_to_hdlc(dev)->priv;
+}
+
+#ifndef __ARMEB__
+static inline void memcpy_swab32(u32 *dest, u32 *src, int cnt)
+{
+ int i;
+
+ for (i = 0; i < cnt; i++)
+ dest[i] = swab32(src[i]);
+}
+#endif
+
+/*****************************************************************************
+ * HSS access
+ ****************************************************************************/
+
+static void hss_npe_send(struct port *port, struct msg *msg, const char *what)
+{
+ u32 *val = (u32 *)msg;
+
+ if (npe_send_message(port->npe, msg, what)) {
+ pr_crit("HSS-%i: unable to send command [%08X:%08X] to %s\n",
+ port->id, val[0], val[1], npe_name(port->npe));
+ BUG();
+ }
+}
+
+static void hss_config_set_lut(struct port *port)
+{
+ struct msg msg;
+ int ch;
+
+ memset(&msg, 0, sizeof(msg));
+ msg.cmd = PORT_CONFIG_WRITE;
+ msg.hss_port = port->id;
+
+ for (ch = 0; ch < MAX_CHANNELS; ch++) {
+ msg.data32 >>= 2;
+ msg.data32 |= TDMMAP_HDLC << 30;
+
+ if (ch % 16 == 15) {
+ msg.index = HSS_CONFIG_TX_LUT + ((ch / 4) & ~3);
+ hss_npe_send(port, &msg, "HSS_SET_TX_LUT");
+
+ msg.index += HSS_CONFIG_RX_LUT - HSS_CONFIG_TX_LUT;
+ hss_npe_send(port, &msg, "HSS_SET_RX_LUT");
+ }
+ }
+}
+
+static void hss_config(struct port *port)
+{
+ struct msg msg;
+
+ memset(&msg, 0, sizeof(msg));
+ msg.cmd = PORT_CONFIG_WRITE;
+ msg.hss_port = port->id;
+ msg.index = HSS_CONFIG_TX_PCR;
+ msg.data32 = PCR_FRM_PULSE_DISABLED | PCR_MSB_ENDIAN |
+ PCR_TX_DATA_ENABLE | PCR_SOF_NO_FBIT;
+ if (port->clock_type == CLOCK_INT)
+ msg.data32 |= PCR_SYNC_CLK_DIR_OUTPUT;
+ hss_npe_send(port, &msg, "HSS_SET_TX_PCR");
+
+ msg.index = HSS_CONFIG_RX_PCR;
+ msg.data32 ^= PCR_TX_DATA_ENABLE | PCR_DCLK_EDGE_RISING;
+ hss_npe_send(port, &msg, "HSS_SET_RX_PCR");
+
+ memset(&msg, 0, sizeof(msg));
+ msg.cmd = PORT_CONFIG_WRITE;
+ msg.hss_port = port->id;
+ msg.index = HSS_CONFIG_CORE_CR;
+ msg.data32 = (port->loopback ? CCR_LOOPBACK : 0) |
+ (port->id ? CCR_SECOND_HSS : 0);
+ hss_npe_send(port, &msg, "HSS_SET_CORE_CR");
+
+ memset(&msg, 0, sizeof(msg));
+ msg.cmd = PORT_CONFIG_WRITE;
+ msg.hss_port = port->id;
+ msg.index = HSS_CONFIG_CLOCK_CR;
+ msg.data32 = port->clock_reg;
+ hss_npe_send(port, &msg, "HSS_SET_CLOCK_CR");
+
+ memset(&msg, 0, sizeof(msg));
+ msg.cmd = PORT_CONFIG_WRITE;
+ msg.hss_port = port->id;
+ msg.index = HSS_CONFIG_TX_FCR;
+ msg.data16a = FRAME_OFFSET;
+ msg.data16b = FRAME_SIZE - 1;
+ hss_npe_send(port, &msg, "HSS_SET_TX_FCR");
+
+ memset(&msg, 0, sizeof(msg));
+ msg.cmd = PORT_CONFIG_WRITE;
+ msg.hss_port = port->id;
+ msg.index = HSS_CONFIG_RX_FCR;
+ msg.data16a = FRAME_OFFSET;
+ msg.data16b = FRAME_SIZE - 1;
+ hss_npe_send(port, &msg, "HSS_SET_RX_FCR");
+
+ hss_config_set_lut(port);
+
+ memset(&msg, 0, sizeof(msg));
+ msg.cmd = PORT_CONFIG_LOAD;
+ msg.hss_port = port->id;
+ hss_npe_send(port, &msg, "HSS_LOAD_CONFIG");
+
+ if (npe_recv_message(port->npe, &msg, "HSS_LOAD_CONFIG") ||
+ /* HSS_LOAD_CONFIG for port #1 returns port_id = #4 */
+ msg.cmd != PORT_CONFIG_LOAD || msg.data32) {
+ pr_crit("HSS-%i: HSS_LOAD_CONFIG failed\n", port->id);
+ BUG();
+ }
+
+ /* HDLC may stop working without this - check FIXME */
+ npe_recv_message(port->npe, &msg, "FLUSH_IT");
+}
+
+static void hss_set_hdlc_cfg(struct port *port)
+{
+ struct msg msg;
+
+ memset(&msg, 0, sizeof(msg));
+ msg.cmd = PKT_PIPE_HDLC_CFG_WRITE;
+ msg.hss_port = port->id;
+ msg.data8a = port->hdlc_cfg; /* rx_cfg */
+ msg.data8b = port->hdlc_cfg | (PKT_EXTRA_FLAGS << 3); /* tx_cfg */
+ hss_npe_send(port, &msg, "HSS_SET_HDLC_CFG");
+}
+
+static u32 hss_get_status(struct port *port)
+{
+ struct msg msg;
+
+ memset(&msg, 0, sizeof(msg));
+ msg.cmd = PORT_ERROR_READ;
+ msg.hss_port = port->id;
+ hss_npe_send(port, &msg, "PORT_ERROR_READ");
+ if (npe_recv_message(port->npe, &msg, "PORT_ERROR_READ")) {
+ pr_crit("HSS-%i: unable to read HSS status\n", port->id);
+ BUG();
+ }
+
+ return msg.data32;
+}
+
+static void hss_start_hdlc(struct port *port)
+{
+ struct msg msg;
+
+ memset(&msg, 0, sizeof(msg));
+ msg.cmd = PKT_PIPE_FLOW_ENABLE;
+ msg.hss_port = port->id;
+ msg.data32 = 0;
+ hss_npe_send(port, &msg, "HSS_ENABLE_PKT_PIPE");
+}
+
+static void hss_stop_hdlc(struct port *port)
+{
+ struct msg msg;
+
+ memset(&msg, 0, sizeof(msg));
+ msg.cmd = PKT_PIPE_FLOW_DISABLE;
+ msg.hss_port = port->id;
+ hss_npe_send(port, &msg, "HSS_DISABLE_PKT_PIPE");
+ hss_get_status(port); /* make sure it's halted */
+}
+
+static int hss_load_firmware(struct port *port)
+{
+ struct msg msg;
+ int err;
+
+ if (port->initialized)
+ return 0;
+
+ if (!npe_running(port->npe)) {
+ err = npe_load_firmware(port->npe, npe_name(port->npe),
+ port->dev);
+ if (err)
+ return err;
+ }
+
+ /* HDLC mode configuration */
+ memset(&msg, 0, sizeof(msg));
+ msg.cmd = PKT_NUM_PIPES_WRITE;
+ msg.hss_port = port->id;
+ msg.data8a = PKT_NUM_PIPES;
+ hss_npe_send(port, &msg, "HSS_SET_PKT_PIPES");
+
+ msg.cmd = PKT_PIPE_FIFO_SIZEW_WRITE;
+ msg.data8a = PKT_PIPE_FIFO_SIZEW;
+ hss_npe_send(port, &msg, "HSS_SET_PKT_FIFO");
+
+ msg.cmd = PKT_PIPE_MODE_WRITE;
+ msg.data8a = NPE_PKT_MODE_HDLC;
+ /* msg.data8b = inv_mask */
+ /* msg.data8c = or_mask */
+ hss_npe_send(port, &msg, "HSS_SET_PKT_MODE");
+
+ msg.cmd = PKT_PIPE_RX_SIZE_WRITE;
+ msg.data16a = HDLC_MAX_MRU; /* including CRC */
+ hss_npe_send(port, &msg, "HSS_SET_PKT_RX_SIZE");
+
+ msg.cmd = PKT_PIPE_IDLE_PATTERN_WRITE;
+ msg.data32 = 0x7F7F7F7F; /* ??? FIXME */
+ hss_npe_send(port, &msg, "HSS_SET_PKT_IDLE");
+
+ port->initialized = 1;
+ return 0;
+}
+
+/*****************************************************************************
+ * packetized (HDLC) operation
+ ****************************************************************************/
+
+static inline void debug_pkt(struct net_device *dev, const char *func,
+ u8 *data, int len)
+{
+#if DEBUG_PKT_BYTES
+ int i;
+
+ printk(KERN_DEBUG "%s: %s(%i)", dev->name, func, len);
+ for (i = 0; i < len; i++) {
+ if (i >= DEBUG_PKT_BYTES)
+ break;
+ printk("%s%02X", !(i % 4) ? " " : "", data[i]);
+ }
+ printk("\n");
+#endif
+}
+
+static inline void debug_desc(u32 phys, struct desc *desc)
+{
+#if DEBUG_DESC
+ printk(KERN_DEBUG "%X: %X %3X %3X %08X %X %X\n",
+ phys, desc->next, desc->buf_len, desc->pkt_len,
+ desc->data, desc->status, desc->error_count);
+#endif
+}
+
+static inline int queue_get_desc(unsigned int queue, struct port *port,
+ int is_tx)
+{
+ u32 phys, tab_phys, n_desc;
+ struct desc *tab;
+
+ phys = qmgr_get_entry(queue);
+ if (!phys)
+ return -1;
+
+ BUG_ON(phys & 0x1F);
+ tab_phys = is_tx ? tx_desc_phys(port, 0) : rx_desc_phys(port, 0);
+ tab = is_tx ? tx_desc_ptr(port, 0) : rx_desc_ptr(port, 0);
+ n_desc = (phys - tab_phys) / sizeof(struct desc);
+ BUG_ON(n_desc >= (is_tx ? TX_DESCS : RX_DESCS));
+ debug_desc(phys, &tab[n_desc]);
+ BUG_ON(tab[n_desc].next);
+ return n_desc;
+}
+
+static inline void queue_put_desc(unsigned int queue, u32 phys,
+ struct desc *desc)
+{
+ debug_desc(phys, desc);
+ BUG_ON(phys & 0x1F);
+ qmgr_put_entry(queue, phys);
+ /* Don't check for queue overflow here, we've allocated sufficient
+ * length and queues >= 32 don't support this check anyway.
+ */
+}
+
+static inline void dma_unmap_tx(struct port *port, struct desc *desc)
+{
+#ifdef __ARMEB__
+ dma_unmap_single(&port->netdev->dev, desc->data,
+ desc->buf_len, DMA_TO_DEVICE);
+#else
+ dma_unmap_single(&port->netdev->dev, desc->data & ~3,
+ ALIGN((desc->data & 3) + desc->buf_len, 4),
+ DMA_TO_DEVICE);
+#endif
+}
+
+static void hss_hdlc_set_carrier(void *pdev, int carrier)
+{
+ struct net_device *netdev = pdev;
+ struct port *port = dev_to_port(netdev);
+ unsigned long flags;
+
+ spin_lock_irqsave(&npe_lock, flags);
+ port->carrier = carrier;
+ if (!port->loopback) {
+ if (carrier)
+ netif_carrier_on(netdev);
+ else
+ netif_carrier_off(netdev);
+ }
+ spin_unlock_irqrestore(&npe_lock, flags);
+}
+
+static void hss_hdlc_rx_irq(void *pdev)
+{
+ struct net_device *dev = pdev;
+ struct port *port = dev_to_port(dev);
+
+#if DEBUG_RX
+ printk(KERN_DEBUG "%s: hss_hdlc_rx_irq\n", dev->name);
+#endif
+ qmgr_disable_irq(port->rxq);
+ napi_schedule(&port->napi);
+}
+
+static int hss_hdlc_poll(struct napi_struct *napi, int budget)
+{
+ struct port *port = container_of(napi, struct port, napi);
+ struct net_device *dev = port->netdev;
+ unsigned int rxq = port->rxq;
+ unsigned int rxfreeq = port->rxfreeq;
+ int received = 0;
+
+#if DEBUG_RX
+ printk(KERN_DEBUG "%s: hss_hdlc_poll\n", dev->name);
+#endif
+
+ while (received < budget) {
+ struct sk_buff *skb;
+ struct desc *desc;
+ int n;
+#ifdef __ARMEB__
+ struct sk_buff *temp;
+ u32 phys;
+#endif
+
+ n = queue_get_desc(rxq, port, 0);
+ if (n < 0) {
+#if DEBUG_RX
+ printk(KERN_DEBUG "%s: hss_hdlc_poll"
+ " napi_complete\n", dev->name);
+#endif
+ napi_complete(napi);
+ qmgr_enable_irq(rxq);
+ if (!qmgr_stat_empty(rxq) &&
+ napi_reschedule(napi)) {
+#if DEBUG_RX
+ printk(KERN_DEBUG "%s: hss_hdlc_poll"
+ " napi_reschedule succeeded\n",
+ dev->name);
+#endif
+ qmgr_disable_irq(rxq);
+ continue;
+ }
+#if DEBUG_RX
+ printk(KERN_DEBUG "%s: hss_hdlc_poll all done\n",
+ dev->name);
+#endif
+ return received; /* all work done */
+ }
+
+ desc = rx_desc_ptr(port, n);
+#if 0 /* FIXME - error_count counts modulo 256, perhaps we should use it */
+ if (desc->error_count)
+ printk(KERN_DEBUG "%s: hss_hdlc_poll status 0x%02X"
+ " errors %u\n", dev->name, desc->status,
+ desc->error_count);
+#endif
+ skb = NULL;
+ switch (desc->status) {
+ case 0:
+#ifdef __ARMEB__
+ skb = netdev_alloc_skb(dev, RX_SIZE);
+ if (skb) {
+ phys = dma_map_single(&dev->dev, skb->data,
+ RX_SIZE,
+ DMA_FROM_DEVICE);
+ if (dma_mapping_error(&dev->dev, phys)) {
+ dev_kfree_skb(skb);
+ skb = NULL;
+ }
+ }
+#else
+ skb = netdev_alloc_skb(dev, desc->pkt_len);
+#endif
+ if (!skb)
+ dev->stats.rx_dropped++;
+ break;
+ case ERR_HDLC_ALIGN:
+ case ERR_HDLC_ABORT:
+ dev->stats.rx_frame_errors++;
+ dev->stats.rx_errors++;
+ break;
+ case ERR_HDLC_FCS:
+ dev->stats.rx_crc_errors++;
+ dev->stats.rx_errors++;
+ break;
+ case ERR_HDLC_TOO_LONG:
+ dev->stats.rx_length_errors++;
+ dev->stats.rx_errors++;
+ break;
+ default: /* FIXME - remove printk */
+ netdev_err(dev, "hss_hdlc_poll: status 0x%02X errors %u\n",
+ desc->status, desc->error_count);
+ dev->stats.rx_errors++;
+ }
+
+ if (!skb) {
+ /* put the desc back on RX-ready queue */
+ desc->buf_len = RX_SIZE;
+ desc->pkt_len = desc->status = 0;
+ queue_put_desc(rxfreeq, rx_desc_phys(port, n), desc);
+ continue;
+ }
+
+ /* process received frame */
+#ifdef __ARMEB__
+ temp = skb;
+ skb = port->rx_buff_tab[n];
+ dma_unmap_single(&dev->dev, desc->data,
+ RX_SIZE, DMA_FROM_DEVICE);
+#else
+ dma_sync_single_for_cpu(&dev->dev, desc->data,
+ RX_SIZE, DMA_FROM_DEVICE);
+ memcpy_swab32((u32 *)skb->data, (u32 *)port->rx_buff_tab[n],
+ ALIGN(desc->pkt_len, 4) / 4);
+#endif
+ skb_put(skb, desc->pkt_len);
+
+ debug_pkt(dev, "hss_hdlc_poll", skb->data, skb->len);
+
+ skb->protocol = hdlc_type_trans(skb, dev);
+ dev->stats.rx_packets++;
+ dev->stats.rx_bytes += skb->len;
+ netif_receive_skb(skb);
+
+ /* put the new buffer on RX-free queue */
+#ifdef __ARMEB__
+ port->rx_buff_tab[n] = temp;
+ desc->data = phys;
+#endif
+ desc->buf_len = RX_SIZE;
+ desc->pkt_len = 0;
+ queue_put_desc(rxfreeq, rx_desc_phys(port, n), desc);
+ received++;
+ }
+#if DEBUG_RX
+ printk(KERN_DEBUG "hss_hdlc_poll: end, not all work done\n");
+#endif
+ return received; /* not all work done */
+}
+
+static void hss_hdlc_txdone_irq(void *pdev)
+{
+ struct net_device *dev = pdev;
+ struct port *port = dev_to_port(dev);
+ int n_desc;
+
+#if DEBUG_TX
+ printk(KERN_DEBUG DRV_NAME ": hss_hdlc_txdone_irq\n");
+#endif
+ while ((n_desc = queue_get_desc(port->txdoneq,
+ port, 1)) >= 0) {
+ struct desc *desc;
+ int start;
+
+ desc = tx_desc_ptr(port, n_desc);
+
+ dev->stats.tx_packets++;
+ dev->stats.tx_bytes += desc->pkt_len;
+
+ dma_unmap_tx(port, desc);
+#if DEBUG_TX
+ printk(KERN_DEBUG "%s: hss_hdlc_txdone_irq free %p\n",
+ dev->name, port->tx_buff_tab[n_desc]);
+#endif
+ free_buffer_irq(port->tx_buff_tab[n_desc]);
+ port->tx_buff_tab[n_desc] = NULL;
+
+ start = qmgr_stat_below_low_watermark(port->txreadyq);
+ queue_put_desc(port->txreadyq,
+ tx_desc_phys(port, n_desc), desc);
+ if (start) { /* TX-ready queue was empty */
+#if DEBUG_TX
+ printk(KERN_DEBUG "%s: hss_hdlc_txdone_irq xmit"
+ " ready\n", dev->name);
+#endif
+ netif_wake_queue(dev);
+ }
+ }
+}
+
+static int hss_hdlc_xmit(struct sk_buff *skb, struct net_device *dev)
+{
+ struct port *port = dev_to_port(dev);
+ unsigned int txreadyq = port->txreadyq;
+ int len, offset, bytes, n;
+ void *mem;
+ u32 phys;
+ struct desc *desc;
+
+#if DEBUG_TX
+ printk(KERN_DEBUG "%s: hss_hdlc_xmit\n", dev->name);
+#endif
+
+ if (unlikely(skb->len > HDLC_MAX_MRU)) {
+ dev_kfree_skb(skb);
+ dev->stats.tx_errors++;
+ return NETDEV_TX_OK;
+ }
+
+ debug_pkt(dev, "hss_hdlc_xmit", skb->data, skb->len);
+
+ len = skb->len;
+#ifdef __ARMEB__
+ offset = 0; /* no need to keep alignment */
+ bytes = len;
+ mem = skb->data;
+#else
+ offset = (int)skb->data & 3; /* keep 32-bit alignment */
+ bytes = ALIGN(offset + len, 4);
+ mem = kmalloc(bytes, GFP_ATOMIC);
+ if (!mem) {
+ dev_kfree_skb(skb);
+ dev->stats.tx_dropped++;
+ return NETDEV_TX_OK;
+ }
+ memcpy_swab32(mem, (u32 *)((uintptr_t)skb->data & ~3), bytes / 4);
+ dev_kfree_skb(skb);
+#endif
+
+ phys = dma_map_single(&dev->dev, mem, bytes, DMA_TO_DEVICE);
+ if (dma_mapping_error(&dev->dev, phys)) {
+#ifdef __ARMEB__
+ dev_kfree_skb(skb);
+#else
+ kfree(mem);
+#endif
+ dev->stats.tx_dropped++;
+ return NETDEV_TX_OK;
+ }
+
+ n = queue_get_desc(txreadyq, port, 1);
+ BUG_ON(n < 0);
+ desc = tx_desc_ptr(port, n);
+
+#ifdef __ARMEB__
+ port->tx_buff_tab[n] = skb;
+#else
+ port->tx_buff_tab[n] = mem;
+#endif
+ desc->data = phys + offset;
+ desc->buf_len = desc->pkt_len = len;
+
+ wmb();
+ queue_put_desc(port->txq, tx_desc_phys(port, n), desc);
+
+ if (qmgr_stat_below_low_watermark(txreadyq)) { /* empty */
+#if DEBUG_TX
+ printk(KERN_DEBUG "%s: hss_hdlc_xmit queue full\n", dev->name);
+#endif
+ netif_stop_queue(dev);
+ /* we could miss TX ready interrupt */
+ if (!qmgr_stat_below_low_watermark(txreadyq)) {
+#if DEBUG_TX
+ printk(KERN_DEBUG "%s: hss_hdlc_xmit ready again\n",
+ dev->name);
+#endif
+ netif_wake_queue(dev);
+ }
+ }
+
+#if DEBUG_TX
+ printk(KERN_DEBUG "%s: hss_hdlc_xmit end\n", dev->name);
+#endif
+ return NETDEV_TX_OK;
+}
+
+static int request_hdlc_queues(struct port *port)
+{
+ int err;
+
+ err = qmgr_request_queue(port->rxfreeq, RX_DESCS, 0, 0,
+ "%s:RX-free", port->netdev->name);
+ if (err)
+ return err;
+
+ err = qmgr_request_queue(port->rxq, RX_DESCS, 0, 0,
+ "%s:RX", port->netdev->name);
+ if (err)
+ goto rel_rxfree;
+
+ err = qmgr_request_queue(port->txq, TX_DESCS, 0, 0,
+ "%s:TX", port->netdev->name);
+ if (err)
+ goto rel_rx;
+
+ err = qmgr_request_queue(port->txreadyq, TX_DESCS, 0, 0,
+ "%s:TX-ready", port->netdev->name);
+ if (err)
+ goto rel_tx;
+
+ err = qmgr_request_queue(port->txdoneq, TX_DESCS, 0, 0,
+ "%s:TX-done", port->netdev->name);
+ if (err)
+ goto rel_txready;
+ return 0;
+
+rel_txready:
+ qmgr_release_queue(port->txreadyq);
+rel_tx:
+ qmgr_release_queue(port->txq);
+rel_rx:
+ qmgr_release_queue(port->rxq);
+rel_rxfree:
+ qmgr_release_queue(port->rxfreeq);
+ printk(KERN_DEBUG "%s: unable to request hardware queues\n",
+ port->netdev->name);
+ return err;
+}
+
+static void release_hdlc_queues(struct port *port)
+{
+ qmgr_release_queue(port->rxfreeq);
+ qmgr_release_queue(port->rxq);
+ qmgr_release_queue(port->txdoneq);
+ qmgr_release_queue(port->txq);
+ qmgr_release_queue(port->txreadyq);
+}
+
+static int init_hdlc_queues(struct port *port)
+{
+ int i;
+
+ if (!ports_open) {
+ dma_pool = dma_pool_create(DRV_NAME, &port->netdev->dev,
+ POOL_ALLOC_SIZE, 32, 0);
+ if (!dma_pool)
+ return -ENOMEM;
+ }
+
+ port->desc_tab = dma_pool_zalloc(dma_pool, GFP_KERNEL,
+ &port->desc_tab_phys);
+ if (!port->desc_tab)
+ return -ENOMEM;
+ memset(port->rx_buff_tab, 0, sizeof(port->rx_buff_tab)); /* tables */
+ memset(port->tx_buff_tab, 0, sizeof(port->tx_buff_tab));
+
+ /* Setup RX buffers */
+ for (i = 0; i < RX_DESCS; i++) {
+ struct desc *desc = rx_desc_ptr(port, i);
+ buffer_t *buff;
+ void *data;
+#ifdef __ARMEB__
+ buff = netdev_alloc_skb(port->netdev, RX_SIZE);
+ if (!buff)
+ return -ENOMEM;
+ data = buff->data;
+#else
+ buff = kmalloc(RX_SIZE, GFP_KERNEL);
+ if (!buff)
+ return -ENOMEM;
+ data = buff;
+#endif
+ desc->buf_len = RX_SIZE;
+ desc->data = dma_map_single(&port->netdev->dev, data,
+ RX_SIZE, DMA_FROM_DEVICE);
+ if (dma_mapping_error(&port->netdev->dev, desc->data)) {
+ free_buffer(buff);
+ return -EIO;
+ }
+ port->rx_buff_tab[i] = buff;
+ }
+
+ return 0;
+}
+
+static void destroy_hdlc_queues(struct port *port)
+{
+ int i;
+
+ if (port->desc_tab) {
+ for (i = 0; i < RX_DESCS; i++) {
+ struct desc *desc = rx_desc_ptr(port, i);
+ buffer_t *buff = port->rx_buff_tab[i];
+
+ if (buff) {
+ dma_unmap_single(&port->netdev->dev,
+ desc->data, RX_SIZE,
+ DMA_FROM_DEVICE);
+ free_buffer(buff);
+ }
+ }
+ for (i = 0; i < TX_DESCS; i++) {
+ struct desc *desc = tx_desc_ptr(port, i);
+ buffer_t *buff = port->tx_buff_tab[i];
+
+ if (buff) {
+ dma_unmap_tx(port, desc);
+ free_buffer(buff);
+ }
+ }
+ dma_pool_free(dma_pool, port->desc_tab, port->desc_tab_phys);
+ port->desc_tab = NULL;
+ }
+
+ if (!ports_open && dma_pool) {
+ dma_pool_destroy(dma_pool);
+ dma_pool = NULL;
+ }
+}
+
+static irqreturn_t hss_hdlc_dcd_irq(int irq, void *data)
+{
+ struct net_device *dev = data;
+ struct port *port = dev_to_port(dev);
+ int val;
+
+ val = gpiod_get_value(port->dcd);
+ hss_hdlc_set_carrier(dev, val);
+
+ return IRQ_HANDLED;
+}
+
+static int hss_hdlc_open(struct net_device *dev)
+{
+ struct port *port = dev_to_port(dev);
+ unsigned long flags;
+ int i, err = 0;
+ int val;
+
+ err = hdlc_open(dev);
+ if (err)
+ return err;
+
+ err = hss_load_firmware(port);
+ if (err)
+ goto err_hdlc_close;
+
+ err = request_hdlc_queues(port);
+ if (err)
+ goto err_hdlc_close;
+
+ err = init_hdlc_queues(port);
+ if (err)
+ goto err_destroy_queues;
+
+ spin_lock_irqsave(&npe_lock, flags);
+
+ /* Set the carrier, the GPIO is flagged active low so this will return
+ * 1 if DCD is asserted.
+ */
+ val = gpiod_get_value(port->dcd);
+ hss_hdlc_set_carrier(dev, val);
+
+ /* Set up an IRQ for DCD */
+ err = request_irq(gpiod_to_irq(port->dcd), hss_hdlc_dcd_irq, 0, "IXP4xx HSS", dev);
+ if (err) {
+ dev_err(&dev->dev, "ixp4xx_hss: failed to request DCD IRQ (%i)\n", err);
+ goto err_unlock;
+ }
+
+ /* GPIOs are flagged active low so this asserts DTR and RTS */
+ gpiod_set_value(port->dtr, 1);
+ gpiod_set_value(port->rts, 1);
+
+ spin_unlock_irqrestore(&npe_lock, flags);
+
+ /* Populate queues with buffers, no failure after this point */
+ for (i = 0; i < TX_DESCS; i++)
+ queue_put_desc(port->txreadyq,
+ tx_desc_phys(port, i), tx_desc_ptr(port, i));
+
+ for (i = 0; i < RX_DESCS; i++)
+ queue_put_desc(port->rxfreeq,
+ rx_desc_phys(port, i), rx_desc_ptr(port, i));
+
+ napi_enable(&port->napi);
+ netif_start_queue(dev);
+
+ qmgr_set_irq(port->rxq, QUEUE_IRQ_SRC_NOT_EMPTY,
+ hss_hdlc_rx_irq, dev);
+
+ qmgr_set_irq(port->txdoneq, QUEUE_IRQ_SRC_NOT_EMPTY,
+ hss_hdlc_txdone_irq, dev);
+ qmgr_enable_irq(port->txdoneq);
+
+ ports_open++;
+
+ hss_set_hdlc_cfg(port);
+ hss_config(port);
+
+ hss_start_hdlc(port);
+
+ /* we may already have RX data, enables IRQ */
+ napi_schedule(&port->napi);
+ return 0;
+
+err_unlock:
+ spin_unlock_irqrestore(&npe_lock, flags);
+err_destroy_queues:
+ destroy_hdlc_queues(port);
+ release_hdlc_queues(port);
+err_hdlc_close:
+ hdlc_close(dev);
+ return err;
+}
+
+static int hss_hdlc_close(struct net_device *dev)
+{
+ struct port *port = dev_to_port(dev);
+ unsigned long flags;
+ int i, buffs = RX_DESCS; /* allocated RX buffers */
+
+ spin_lock_irqsave(&npe_lock, flags);
+ ports_open--;
+ qmgr_disable_irq(port->rxq);
+ netif_stop_queue(dev);
+ napi_disable(&port->napi);
+
+ hss_stop_hdlc(port);
+
+ while (queue_get_desc(port->rxfreeq, port, 0) >= 0)
+ buffs--;
+ while (queue_get_desc(port->rxq, port, 0) >= 0)
+ buffs--;
+
+ if (buffs)
+ netdev_crit(dev, "unable to drain RX queue, %i buffer(s) left in NPE\n",
+ buffs);
+
+ buffs = TX_DESCS;
+ while (queue_get_desc(port->txq, port, 1) >= 0)
+ buffs--; /* cancel TX */
+
+ i = 0;
+ do {
+ while (queue_get_desc(port->txreadyq, port, 1) >= 0)
+ buffs--;
+ if (!buffs)
+ break;
+ } while (++i < MAX_CLOSE_WAIT);
+
+ if (buffs)
+ netdev_crit(dev, "unable to drain TX queue, %i buffer(s) left in NPE\n",
+ buffs);
+#if DEBUG_CLOSE
+ if (!buffs)
+ printk(KERN_DEBUG "Draining TX queues took %i cycles\n", i);
+#endif
+ qmgr_disable_irq(port->txdoneq);
+
+ free_irq(gpiod_to_irq(port->dcd), dev);
+ /* GPIOs are flagged active low so this de-asserts DTR and RTS */
+ gpiod_set_value(port->dtr, 0);
+ gpiod_set_value(port->rts, 0);
+ spin_unlock_irqrestore(&npe_lock, flags);
+
+ destroy_hdlc_queues(port);
+ release_hdlc_queues(port);
+ hdlc_close(dev);
+ return 0;
+}
+
+static int hss_hdlc_attach(struct net_device *dev, unsigned short encoding,
+ unsigned short parity)
+{
+ struct port *port = dev_to_port(dev);
+
+ if (encoding != ENCODING_NRZ)
+ return -EINVAL;
+
+ switch (parity) {
+ case PARITY_CRC16_PR1_CCITT:
+ port->hdlc_cfg = 0;
+ return 0;
+
+ case PARITY_CRC32_PR1_CCITT:
+ port->hdlc_cfg = PKT_HDLC_CRC_32;
+ return 0;
+
+ default:
+ return -EINVAL;
+ }
+}
+
+static u32 check_clock(u32 timer_freq, u32 rate, u32 a, u32 b, u32 c,
+ u32 *best, u32 *best_diff, u32 *reg)
+{
+ /* a is 10-bit, b is 10-bit, c is 12-bit */
+ u64 new_rate;
+ u32 new_diff;
+
+ new_rate = timer_freq * (u64)(c + 1);
+ do_div(new_rate, a * (c + 1) + b + 1);
+ new_diff = abs((u32)new_rate - rate);
+
+ if (new_diff < *best_diff) {
+ *best = new_rate;
+ *best_diff = new_diff;
+ *reg = (a << 22) | (b << 12) | c;
+ }
+ return new_diff;
+}
+
+static void find_best_clock(u32 timer_freq, u32 rate, u32 *best, u32 *reg)
+{
+ u32 a, b, diff = 0xFFFFFFFF;
+
+ a = timer_freq / rate;
+
+ if (a > 0x3FF) { /* 10-bit value - we can go as slow as ca. 65 kb/s */
+ check_clock(timer_freq, rate, 0x3FF, 1, 1, best, &diff, reg);
+ return;
+ }
+ if (a == 0) { /* > 66.666 MHz */
+ a = 1; /* minimum divider is 1 (a = 0, b = 1, c = 1) */
+ rate = timer_freq;
+ }
+
+ if (rate * a == timer_freq) { /* don't divide by 0 later */
+ check_clock(timer_freq, rate, a - 1, 1, 1, best, &diff, reg);
+ return;
+ }
+
+ for (b = 0; b < 0x400; b++) {
+ u64 c = (b + 1) * (u64)rate;
+
+ do_div(c, timer_freq - rate * a);
+ c--;
+ if (c >= 0xFFF) { /* 12-bit - no need to check more 'b's */
+ if (b == 0 && /* also try a bit higher rate */
+ !check_clock(timer_freq, rate, a - 1, 1, 1, best,
+ &diff, reg))
+ return;
+ check_clock(timer_freq, rate, a, b, 0xFFF, best,
+ &diff, reg);
+ return;
+ }
+ if (!check_clock(timer_freq, rate, a, b, c, best, &diff, reg))
+ return;
+ if (!check_clock(timer_freq, rate, a, b, c + 1, best, &diff,
+ reg))
+ return;
+ }
+}
+
+static int hss_hdlc_set_clock(struct port *port, unsigned int clock_type)
+{
+ switch (clock_type) {
+ case CLOCK_DEFAULT:
+ case CLOCK_EXT:
+ gpiod_set_value(port->clk_internal, 0);
+ return CLOCK_EXT;
+ case CLOCK_INT:
+ gpiod_set_value(port->clk_internal, 1);
+ return CLOCK_INT;
+ default:
+ return -EINVAL;
+ }
+}
+
+static int hss_hdlc_ioctl(struct net_device *dev, struct if_settings *ifs)
+{
+ const size_t size = sizeof(sync_serial_settings);
+ sync_serial_settings new_line;
+ sync_serial_settings __user *line = ifs->ifs_ifsu.sync;
+ struct port *port = dev_to_port(dev);
+ unsigned long flags;
+ int clk;
+
+ switch (ifs->type) {
+ case IF_GET_IFACE:
+ ifs->type = IF_IFACE_V35;
+ if (ifs->size < size) {
+ ifs->size = size; /* data size wanted */
+ return -ENOBUFS;
+ }
+ memset(&new_line, 0, sizeof(new_line));
+ new_line.clock_type = port->clock_type;
+ new_line.clock_rate = port->clock_rate;
+ new_line.loopback = port->loopback;
+ if (copy_to_user(line, &new_line, size))
+ return -EFAULT;
+ return 0;
+
+ case IF_IFACE_SYNC_SERIAL:
+ case IF_IFACE_V35:
+ if (!capable(CAP_NET_ADMIN))
+ return -EPERM;
+ if (copy_from_user(&new_line, line, size))
+ return -EFAULT;
+
+ clk = new_line.clock_type;
+ hss_hdlc_set_clock(port, clk);
+
+ if (clk != CLOCK_EXT && clk != CLOCK_INT)
+ return -EINVAL; /* No such clock setting */
+
+ if (new_line.loopback != 0 && new_line.loopback != 1)
+ return -EINVAL;
+
+ port->clock_type = clk; /* Update settings */
+ if (clk == CLOCK_INT) {
+ find_best_clock(IXP4XX_TIMER_FREQ,
+ new_line.clock_rate,
+ &port->clock_rate, &port->clock_reg);
+ } else {
+ port->clock_rate = 0;
+ port->clock_reg = CLK42X_SPEED_2048KHZ;
+ }
+ port->loopback = new_line.loopback;
+
+ spin_lock_irqsave(&npe_lock, flags);
+
+ if (dev->flags & IFF_UP)
+ hss_config(port);
+
+ if (port->loopback || port->carrier)
+ netif_carrier_on(port->netdev);
+ else
+ netif_carrier_off(port->netdev);
+ spin_unlock_irqrestore(&npe_lock, flags);
+
+ return 0;
+
+ default:
+ return hdlc_ioctl(dev, ifs);
+ }
+}
+
+/*****************************************************************************
+ * initialization
+ ****************************************************************************/
+
+static const struct net_device_ops hss_hdlc_ops = {
+ .ndo_open = hss_hdlc_open,
+ .ndo_stop = hss_hdlc_close,
+ .ndo_start_xmit = hdlc_start_xmit,
+ .ndo_siocwandev = hss_hdlc_ioctl,
+};
+
+static int ixp4xx_hss_probe(struct platform_device *pdev)
+{
+ struct of_phandle_args queue_spec;
+ struct of_phandle_args npe_spec;
+ struct device *dev = &pdev->dev;
+ struct net_device *ndev;
+ struct device_node *np;
+ struct regmap *rmap;
+ struct port *port;
+ hdlc_device *hdlc;
+ int err;
+ u32 val;
+
+ /*
+ * Go into the syscon and check if we have the HSS and HDLC
+ * features available, else this will not work.
+ */
+ rmap = syscon_regmap_lookup_by_compatible("syscon");
+ if (IS_ERR(rmap))
+ return dev_err_probe(dev, PTR_ERR(rmap),
+ "failed to look up syscon\n");
+
+ val = cpu_ixp4xx_features(rmap);
+
+ if ((val & (IXP4XX_FEATURE_HDLC | IXP4XX_FEATURE_HSS)) !=
+ (IXP4XX_FEATURE_HDLC | IXP4XX_FEATURE_HSS)) {
+ dev_err(dev, "HDLC and HSS feature unavailable in platform\n");
+ return -ENODEV;
+ }
+
+ np = dev->of_node;
+
+ port = devm_kzalloc(dev, sizeof(*port), GFP_KERNEL);
+ if (!port)
+ return -ENOMEM;
+
+ err = of_parse_phandle_with_fixed_args(np, "intel,npe-handle", 1, 0,
+ &npe_spec);
+ if (err)
+ return dev_err_probe(dev, err, "no NPE engine specified\n");
+ /* NPE ID 0x00, 0x10, 0x20... */
+ port->npe = npe_request(npe_spec.args[0] << 4);
+ if (!port->npe) {
+ dev_err(dev, "unable to obtain NPE instance\n");
+ return -ENODEV;
+ }
+
+ /* Get the TX ready queue as resource from queue manager */
+ err = of_parse_phandle_with_fixed_args(np, "intek,queue-chl-txready", 1, 0,
+ &queue_spec);
+ if (err)
+ return dev_err_probe(dev, err, "no txready queue phandle\n");
+ port->txreadyq = queue_spec.args[0];
+ /* Get the RX trig queue as resource from queue manager */
+ err = of_parse_phandle_with_fixed_args(np, "intek,queue-chl-rxtrig", 1, 0,
+ &queue_spec);
+ if (err)
+ return dev_err_probe(dev, err, "no rxtrig queue phandle\n");
+ port->rxtrigq = queue_spec.args[0];
+ /* Get the RX queue as resource from queue manager */
+ err = of_parse_phandle_with_fixed_args(np, "intek,queue-pkt-rx", 1, 0,
+ &queue_spec);
+ if (err)
+ return dev_err_probe(dev, err, "no RX queue phandle\n");
+ port->rxq = queue_spec.args[0];
+ /* Get the TX queue as resource from queue manager */
+ err = of_parse_phandle_with_fixed_args(np, "intek,queue-pkt-tx", 1, 0,
+ &queue_spec);
+ if (err)
+ return dev_err_probe(dev, err, "no RX queue phandle\n");
+ port->txq = queue_spec.args[0];
+ /* Get the RX free queue as resource from queue manager */
+ err = of_parse_phandle_with_fixed_args(np, "intek,queue-pkt-rxfree", 1, 0,
+ &queue_spec);
+ if (err)
+ return dev_err_probe(dev, err, "no RX free queue phandle\n");
+ port->rxfreeq = queue_spec.args[0];
+ /* Get the TX done queue as resource from queue manager */
+ err = of_parse_phandle_with_fixed_args(np, "intek,queue-pkt-txdone", 1, 0,
+ &queue_spec);
+ if (err)
+ return dev_err_probe(dev, err, "no TX done queue phandle\n");
+ port->txdoneq = queue_spec.args[0];
+
+ /* Obtain all the line control GPIOs */
+ port->cts = devm_gpiod_get(dev, "cts", GPIOD_OUT_LOW);
+ if (IS_ERR(port->cts))
+ return dev_err_probe(dev, PTR_ERR(port->cts), "unable to get CTS GPIO\n");
+ port->rts = devm_gpiod_get(dev, "rts", GPIOD_OUT_LOW);
+ if (IS_ERR(port->rts))
+ return dev_err_probe(dev, PTR_ERR(port->rts), "unable to get RTS GPIO\n");
+ port->dcd = devm_gpiod_get(dev, "dcd", GPIOD_IN);
+ if (IS_ERR(port->dcd))
+ return dev_err_probe(dev, PTR_ERR(port->dcd), "unable to get DCD GPIO\n");
+ port->dtr = devm_gpiod_get(dev, "dtr", GPIOD_OUT_LOW);
+ if (IS_ERR(port->dtr))
+ return dev_err_probe(dev, PTR_ERR(port->dtr), "unable to get DTR GPIO\n");
+ port->clk_internal = devm_gpiod_get(dev, "clk-internal", GPIOD_OUT_LOW);
+ if (IS_ERR(port->clk_internal))
+ return dev_err_probe(dev, PTR_ERR(port->clk_internal),
+ "unable to get CLK internal GPIO\n");
+
+ ndev = alloc_hdlcdev(port);
+ port->netdev = alloc_hdlcdev(port);
+ if (!port->netdev) {
+ err = -ENOMEM;
+ goto err_plat;
+ }
+
+ SET_NETDEV_DEV(ndev, &pdev->dev);
+ hdlc = dev_to_hdlc(ndev);
+ hdlc->attach = hss_hdlc_attach;
+ hdlc->xmit = hss_hdlc_xmit;
+ ndev->netdev_ops = &hss_hdlc_ops;
+ ndev->tx_queue_len = 100;
+ port->clock_type = CLOCK_EXT;
+ port->clock_rate = 0;
+ port->clock_reg = CLK42X_SPEED_2048KHZ;
+ port->id = pdev->id;
+ port->dev = &pdev->dev;
+ netif_napi_add_weight(ndev, &port->napi, hss_hdlc_poll, NAPI_WEIGHT);
+
+ err = register_hdlc_device(ndev);
+ if (err)
+ goto err_free_netdev;
+
+ platform_set_drvdata(pdev, port);
+
+ netdev_info(ndev, "initialized\n");
+ return 0;
+
+err_free_netdev:
+ free_netdev(ndev);
+err_plat:
+ npe_release(port->npe);
+ return err;
+}
+
+static int ixp4xx_hss_remove(struct platform_device *pdev)
+{
+ struct port *port = platform_get_drvdata(pdev);
+
+ unregister_hdlc_device(port->netdev);
+ free_netdev(port->netdev);
+ npe_release(port->npe);
+ return 0;
+}
+
+static struct platform_driver ixp4xx_hss_driver = {
+ .driver.name = DRV_NAME,
+ .probe = ixp4xx_hss_probe,
+ .remove = ixp4xx_hss_remove,
+};
+module_platform_driver(ixp4xx_hss_driver);
+
+MODULE_AUTHOR("Krzysztof Halasa");
+MODULE_DESCRIPTION("Intel IXP4xx HSS driver");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:ixp4xx_hss");
diff --git a/drivers/net/wan/lapbether.c b/drivers/net/wan/lapbether.c
new file mode 100644
index 000000000..56326f38f
--- /dev/null
+++ b/drivers/net/wan/lapbether.c
@@ -0,0 +1,526 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * "LAPB via ethernet" driver release 001
+ *
+ * This code REQUIRES 2.1.15 or higher/ NET3.038
+ *
+ * This is a "pseudo" network driver to allow LAPB over Ethernet.
+ *
+ * This driver can use any ethernet destination address, and can be
+ * limited to accept frames from one dedicated ethernet card only.
+ *
+ * History
+ * LAPBETH 001 Jonathan Naylor Cloned from bpqether.c
+ * 2000-10-29 Henner Eisen lapb_data_indication() return status.
+ * 2000-11-14 Henner Eisen dev_hold/put, NETDEV_GOING_DOWN support
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/errno.h>
+#include <linux/types.h>
+#include <linux/socket.h>
+#include <linux/in.h>
+#include <linux/slab.h>
+#include <linux/kernel.h>
+#include <linux/string.h>
+#include <linux/net.h>
+#include <linux/inet.h>
+#include <linux/netdevice.h>
+#include <linux/if_arp.h>
+#include <linux/skbuff.h>
+#include <net/sock.h>
+#include <linux/uaccess.h>
+#include <linux/mm.h>
+#include <linux/interrupt.h>
+#include <linux/notifier.h>
+#include <linux/stat.h>
+#include <linux/module.h>
+#include <linux/lapb.h>
+#include <linux/init.h>
+
+#include <net/x25device.h>
+
+static const u8 bcast_addr[6] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
+
+/* If this number is made larger, check that the temporary string buffer
+ * in lapbeth_new_device is large enough to store the probe device name.
+ */
+#define MAXLAPBDEV 100
+
+struct lapbethdev {
+ struct list_head node;
+ struct net_device *ethdev; /* link to ethernet device */
+ struct net_device *axdev; /* lapbeth device (lapb#) */
+ bool up;
+ spinlock_t up_lock; /* Protects "up" */
+ struct sk_buff_head rx_queue;
+ struct napi_struct napi;
+};
+
+static LIST_HEAD(lapbeth_devices);
+
+static void lapbeth_connected(struct net_device *dev, int reason);
+static void lapbeth_disconnected(struct net_device *dev, int reason);
+
+/* ------------------------------------------------------------------------ */
+
+/* Get the LAPB device for the ethernet device
+ */
+static struct lapbethdev *lapbeth_get_x25_dev(struct net_device *dev)
+{
+ struct lapbethdev *lapbeth;
+
+ list_for_each_entry_rcu(lapbeth, &lapbeth_devices, node, lockdep_rtnl_is_held()) {
+ if (lapbeth->ethdev == dev)
+ return lapbeth;
+ }
+ return NULL;
+}
+
+static __inline__ int dev_is_ethdev(struct net_device *dev)
+{
+ return dev->type == ARPHRD_ETHER && strncmp(dev->name, "dummy", 5);
+}
+
+/* ------------------------------------------------------------------------ */
+
+static int lapbeth_napi_poll(struct napi_struct *napi, int budget)
+{
+ struct lapbethdev *lapbeth = container_of(napi, struct lapbethdev,
+ napi);
+ struct sk_buff *skb;
+ int processed = 0;
+
+ for (; processed < budget; ++processed) {
+ skb = skb_dequeue(&lapbeth->rx_queue);
+ if (!skb)
+ break;
+ netif_receive_skb_core(skb);
+ }
+
+ if (processed < budget)
+ napi_complete(napi);
+
+ return processed;
+}
+
+/* Receive a LAPB frame via an ethernet interface.
+ */
+static int lapbeth_rcv(struct sk_buff *skb, struct net_device *dev,
+ struct packet_type *ptype, struct net_device *orig_dev)
+{
+ int len, err;
+ struct lapbethdev *lapbeth;
+
+ if (dev_net(dev) != &init_net)
+ goto drop;
+
+ skb = skb_share_check(skb, GFP_ATOMIC);
+ if (!skb)
+ return NET_RX_DROP;
+
+ if (!pskb_may_pull(skb, 2))
+ goto drop;
+
+ rcu_read_lock();
+ lapbeth = lapbeth_get_x25_dev(dev);
+ if (!lapbeth)
+ goto drop_unlock_rcu;
+ spin_lock_bh(&lapbeth->up_lock);
+ if (!lapbeth->up)
+ goto drop_unlock;
+
+ len = skb->data[0] + skb->data[1] * 256;
+ dev->stats.rx_packets++;
+ dev->stats.rx_bytes += len;
+
+ skb_pull(skb, 2); /* Remove the length bytes */
+ skb_trim(skb, len); /* Set the length of the data */
+
+ err = lapb_data_received(lapbeth->axdev, skb);
+ if (err != LAPB_OK) {
+ printk(KERN_DEBUG "lapbether: lapb_data_received err - %d\n", err);
+ goto drop_unlock;
+ }
+out:
+ spin_unlock_bh(&lapbeth->up_lock);
+ rcu_read_unlock();
+ return 0;
+drop_unlock:
+ kfree_skb(skb);
+ goto out;
+drop_unlock_rcu:
+ rcu_read_unlock();
+drop:
+ kfree_skb(skb);
+ return 0;
+}
+
+static int lapbeth_data_indication(struct net_device *dev, struct sk_buff *skb)
+{
+ struct lapbethdev *lapbeth = netdev_priv(dev);
+ unsigned char *ptr;
+
+ if (skb_cow(skb, 1)) {
+ kfree_skb(skb);
+ return NET_RX_DROP;
+ }
+
+ skb_push(skb, 1);
+
+ ptr = skb->data;
+ *ptr = X25_IFACE_DATA;
+
+ skb->protocol = x25_type_trans(skb, dev);
+
+ skb_queue_tail(&lapbeth->rx_queue, skb);
+ napi_schedule(&lapbeth->napi);
+ return NET_RX_SUCCESS;
+}
+
+/* Send a LAPB frame via an ethernet interface
+ */
+static netdev_tx_t lapbeth_xmit(struct sk_buff *skb,
+ struct net_device *dev)
+{
+ struct lapbethdev *lapbeth = netdev_priv(dev);
+ int err;
+
+ spin_lock_bh(&lapbeth->up_lock);
+ if (!lapbeth->up)
+ goto drop;
+
+ /* There should be a pseudo header of 1 byte added by upper layers.
+ * Check to make sure it is there before reading it.
+ */
+ if (skb->len < 1)
+ goto drop;
+
+ switch (skb->data[0]) {
+ case X25_IFACE_DATA:
+ break;
+ case X25_IFACE_CONNECT:
+ err = lapb_connect_request(dev);
+ if (err == LAPB_CONNECTED)
+ lapbeth_connected(dev, LAPB_OK);
+ else if (err != LAPB_OK)
+ pr_err("lapb_connect_request error: %d\n", err);
+ goto drop;
+ case X25_IFACE_DISCONNECT:
+ err = lapb_disconnect_request(dev);
+ if (err == LAPB_NOTCONNECTED)
+ lapbeth_disconnected(dev, LAPB_OK);
+ else if (err != LAPB_OK)
+ pr_err("lapb_disconnect_request err: %d\n", err);
+ fallthrough;
+ default:
+ goto drop;
+ }
+
+ skb_pull(skb, 1);
+
+ err = lapb_data_request(dev, skb);
+ if (err != LAPB_OK) {
+ pr_err("lapb_data_request error - %d\n", err);
+ goto drop;
+ }
+out:
+ spin_unlock_bh(&lapbeth->up_lock);
+ return NETDEV_TX_OK;
+drop:
+ kfree_skb(skb);
+ goto out;
+}
+
+static void lapbeth_data_transmit(struct net_device *ndev, struct sk_buff *skb)
+{
+ struct lapbethdev *lapbeth = netdev_priv(ndev);
+ unsigned char *ptr;
+ struct net_device *dev;
+ int size = skb->len;
+
+ ptr = skb_push(skb, 2);
+
+ *ptr++ = size % 256;
+ *ptr++ = size / 256;
+
+ ndev->stats.tx_packets++;
+ ndev->stats.tx_bytes += size;
+
+ skb->dev = dev = lapbeth->ethdev;
+
+ skb->protocol = htons(ETH_P_DEC);
+
+ skb_reset_network_header(skb);
+
+ dev_hard_header(skb, dev, ETH_P_DEC, bcast_addr, NULL, 0);
+
+ dev_queue_xmit(skb);
+}
+
+static void lapbeth_connected(struct net_device *dev, int reason)
+{
+ struct lapbethdev *lapbeth = netdev_priv(dev);
+ unsigned char *ptr;
+ struct sk_buff *skb = __dev_alloc_skb(1, GFP_ATOMIC | __GFP_NOMEMALLOC);
+
+ if (!skb)
+ return;
+
+ ptr = skb_put(skb, 1);
+ *ptr = X25_IFACE_CONNECT;
+
+ skb->protocol = x25_type_trans(skb, dev);
+
+ skb_queue_tail(&lapbeth->rx_queue, skb);
+ napi_schedule(&lapbeth->napi);
+}
+
+static void lapbeth_disconnected(struct net_device *dev, int reason)
+{
+ struct lapbethdev *lapbeth = netdev_priv(dev);
+ unsigned char *ptr;
+ struct sk_buff *skb = __dev_alloc_skb(1, GFP_ATOMIC | __GFP_NOMEMALLOC);
+
+ if (!skb)
+ return;
+
+ ptr = skb_put(skb, 1);
+ *ptr = X25_IFACE_DISCONNECT;
+
+ skb->protocol = x25_type_trans(skb, dev);
+
+ skb_queue_tail(&lapbeth->rx_queue, skb);
+ napi_schedule(&lapbeth->napi);
+}
+
+/* Set AX.25 callsign
+ */
+static int lapbeth_set_mac_address(struct net_device *dev, void *addr)
+{
+ struct sockaddr *sa = addr;
+
+ dev_addr_set(dev, sa->sa_data);
+ return 0;
+}
+
+static const struct lapb_register_struct lapbeth_callbacks = {
+ .connect_confirmation = lapbeth_connected,
+ .connect_indication = lapbeth_connected,
+ .disconnect_confirmation = lapbeth_disconnected,
+ .disconnect_indication = lapbeth_disconnected,
+ .data_indication = lapbeth_data_indication,
+ .data_transmit = lapbeth_data_transmit,
+};
+
+/* open/close a device
+ */
+static int lapbeth_open(struct net_device *dev)
+{
+ struct lapbethdev *lapbeth = netdev_priv(dev);
+ int err;
+
+ napi_enable(&lapbeth->napi);
+
+ err = lapb_register(dev, &lapbeth_callbacks);
+ if (err != LAPB_OK) {
+ napi_disable(&lapbeth->napi);
+ pr_err("lapb_register error: %d\n", err);
+ return -ENODEV;
+ }
+
+ spin_lock_bh(&lapbeth->up_lock);
+ lapbeth->up = true;
+ spin_unlock_bh(&lapbeth->up_lock);
+
+ return 0;
+}
+
+static int lapbeth_close(struct net_device *dev)
+{
+ struct lapbethdev *lapbeth = netdev_priv(dev);
+ int err;
+
+ spin_lock_bh(&lapbeth->up_lock);
+ lapbeth->up = false;
+ spin_unlock_bh(&lapbeth->up_lock);
+
+ err = lapb_unregister(dev);
+ if (err != LAPB_OK)
+ pr_err("lapb_unregister error: %d\n", err);
+
+ napi_disable(&lapbeth->napi);
+
+ return 0;
+}
+
+/* ------------------------------------------------------------------------ */
+
+static const struct net_device_ops lapbeth_netdev_ops = {
+ .ndo_open = lapbeth_open,
+ .ndo_stop = lapbeth_close,
+ .ndo_start_xmit = lapbeth_xmit,
+ .ndo_set_mac_address = lapbeth_set_mac_address,
+};
+
+static void lapbeth_setup(struct net_device *dev)
+{
+ dev->netdev_ops = &lapbeth_netdev_ops;
+ dev->needs_free_netdev = true;
+ dev->type = ARPHRD_X25;
+ dev->hard_header_len = 0;
+ dev->mtu = 1000;
+ dev->addr_len = 0;
+}
+
+/* Setup a new device.
+ */
+static int lapbeth_new_device(struct net_device *dev)
+{
+ struct net_device *ndev;
+ struct lapbethdev *lapbeth;
+ int rc = -ENOMEM;
+
+ ASSERT_RTNL();
+
+ if (dev->type != ARPHRD_ETHER)
+ return -EINVAL;
+
+ ndev = alloc_netdev(sizeof(*lapbeth), "lapb%d", NET_NAME_UNKNOWN,
+ lapbeth_setup);
+ if (!ndev)
+ goto out;
+
+ /* When transmitting data:
+ * first this driver removes a pseudo header of 1 byte,
+ * then the lapb module prepends an LAPB header of at most 3 bytes,
+ * then this driver prepends a length field of 2 bytes,
+ * then the underlying Ethernet device prepends its own header.
+ */
+ ndev->needed_headroom = -1 + 3 + 2 + dev->hard_header_len
+ + dev->needed_headroom;
+ ndev->needed_tailroom = dev->needed_tailroom;
+
+ lapbeth = netdev_priv(ndev);
+ lapbeth->axdev = ndev;
+
+ dev_hold(dev);
+ lapbeth->ethdev = dev;
+
+ lapbeth->up = false;
+ spin_lock_init(&lapbeth->up_lock);
+
+ skb_queue_head_init(&lapbeth->rx_queue);
+ netif_napi_add_weight(ndev, &lapbeth->napi, lapbeth_napi_poll, 16);
+
+ rc = -EIO;
+ if (register_netdevice(ndev))
+ goto fail;
+
+ list_add_rcu(&lapbeth->node, &lapbeth_devices);
+ rc = 0;
+out:
+ return rc;
+fail:
+ dev_put(dev);
+ free_netdev(ndev);
+ goto out;
+}
+
+/* Free a lapb network device.
+ */
+static void lapbeth_free_device(struct lapbethdev *lapbeth)
+{
+ dev_put(lapbeth->ethdev);
+ list_del_rcu(&lapbeth->node);
+ unregister_netdevice(lapbeth->axdev);
+}
+
+/* Handle device status changes.
+ *
+ * Called from notifier with RTNL held.
+ */
+static int lapbeth_device_event(struct notifier_block *this,
+ unsigned long event, void *ptr)
+{
+ struct lapbethdev *lapbeth;
+ struct net_device *dev = netdev_notifier_info_to_dev(ptr);
+
+ if (dev_net(dev) != &init_net)
+ return NOTIFY_DONE;
+
+ if (!dev_is_ethdev(dev) && !lapbeth_get_x25_dev(dev))
+ return NOTIFY_DONE;
+
+ switch (event) {
+ case NETDEV_UP:
+ /* New ethernet device -> new LAPB interface */
+ if (!lapbeth_get_x25_dev(dev))
+ lapbeth_new_device(dev);
+ break;
+ case NETDEV_GOING_DOWN:
+ /* ethernet device closes -> close LAPB interface */
+ lapbeth = lapbeth_get_x25_dev(dev);
+ if (lapbeth)
+ dev_close(lapbeth->axdev);
+ break;
+ case NETDEV_UNREGISTER:
+ /* ethernet device disappears -> remove LAPB interface */
+ lapbeth = lapbeth_get_x25_dev(dev);
+ if (lapbeth)
+ lapbeth_free_device(lapbeth);
+ break;
+ }
+
+ return NOTIFY_DONE;
+}
+
+/* ------------------------------------------------------------------------ */
+
+static struct packet_type lapbeth_packet_type __read_mostly = {
+ .type = cpu_to_be16(ETH_P_DEC),
+ .func = lapbeth_rcv,
+};
+
+static struct notifier_block lapbeth_dev_notifier = {
+ .notifier_call = lapbeth_device_event,
+};
+
+static const char banner[] __initconst =
+ KERN_INFO "LAPB Ethernet driver version 0.02\n";
+
+static int __init lapbeth_init_driver(void)
+{
+ dev_add_pack(&lapbeth_packet_type);
+
+ register_netdevice_notifier(&lapbeth_dev_notifier);
+
+ printk(banner);
+
+ return 0;
+}
+module_init(lapbeth_init_driver);
+
+static void __exit lapbeth_cleanup_driver(void)
+{
+ struct lapbethdev *lapbeth;
+ struct list_head *entry, *tmp;
+
+ dev_remove_pack(&lapbeth_packet_type);
+ unregister_netdevice_notifier(&lapbeth_dev_notifier);
+
+ rtnl_lock();
+ list_for_each_safe(entry, tmp, &lapbeth_devices) {
+ lapbeth = list_entry(entry, struct lapbethdev, node);
+
+ dev_put(lapbeth->ethdev);
+ unregister_netdevice(lapbeth->axdev);
+ }
+ rtnl_unlock();
+}
+module_exit(lapbeth_cleanup_driver);
+
+MODULE_AUTHOR("Jonathan Naylor <g4klx@g4klx.demon.co.uk>");
+MODULE_DESCRIPTION("The unofficial LAPB over Ethernet driver");
+MODULE_LICENSE("GPL");
diff --git a/drivers/net/wan/n2.c b/drivers/net/wan/n2.c
new file mode 100644
index 000000000..f3e80722b
--- /dev/null
+++ b/drivers/net/wan/n2.c
@@ -0,0 +1,546 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * SDL Inc. RISCom/N2 synchronous serial card driver for Linux
+ *
+ * Copyright (C) 1998-2003 Krzysztof Halasa <khc@pm.waw.pl>
+ *
+ * For information see <https://www.kernel.org/pub/linux/utils/net/hdlc/>
+ *
+ * Note: integrated CSU/DSU/DDS are not supported by this driver
+ *
+ * Sources of information:
+ * Hitachi HD64570 SCA User's Manual
+ * SDL Inc. PPP/HDLC/CISCO driver
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/capability.h>
+#include <linux/slab.h>
+#include <linux/types.h>
+#include <linux/fcntl.h>
+#include <linux/in.h>
+#include <linux/string.h>
+#include <linux/errno.h>
+#include <linux/init.h>
+#include <linux/ioport.h>
+#include <linux/moduleparam.h>
+#include <linux/netdevice.h>
+#include <linux/hdlc.h>
+#include <asm/io.h>
+#include "hd64570.h"
+
+static const char *version = "SDL RISCom/N2 driver version: 1.15";
+static const char *devname = "RISCom/N2";
+
+#undef DEBUG_PKT
+#define DEBUG_RINGS
+
+#define USE_WINDOWSIZE 16384
+#define USE_BUS16BITS 1
+#define CLOCK_BASE 9830400 /* 9.8304 MHz */
+#define MAX_PAGES 16 /* 16 RAM pages at max */
+#define MAX_RAM_SIZE 0x80000 /* 512 KB */
+#if MAX_RAM_SIZE > MAX_PAGES * USE_WINDOWSIZE
+#undef MAX_RAM_SIZE
+#define MAX_RAM_SIZE (MAX_PAGES * USE_WINDOWSIZE)
+#endif
+#define N2_IOPORTS 0x10
+#define NEED_DETECT_RAM
+#define NEED_SCA_MSCI_INTR
+#define MAX_TX_BUFFERS 10
+
+static char *hw; /* pointer to hw=xxx command line string */
+
+/* RISCom/N2 Board Registers */
+
+/* PC Control Register */
+#define N2_PCR 0
+#define PCR_RUNSCA 1 /* Run 64570 */
+#define PCR_VPM 2 /* Enable VPM - needed if using RAM above 1 MB */
+#define PCR_ENWIN 4 /* Open window */
+#define PCR_BUS16 8 /* 16-bit bus */
+
+/* Memory Base Address Register */
+#define N2_BAR 2
+
+/* Page Scan Register */
+#define N2_PSR 4
+#define WIN16K 0x00
+#define WIN32K 0x20
+#define WIN64K 0x40
+#define PSR_WINBITS 0x60
+#define PSR_DMAEN 0x80
+#define PSR_PAGEBITS 0x0F
+
+/* Modem Control Reg */
+#define N2_MCR 6
+#define CLOCK_OUT_PORT1 0x80
+#define CLOCK_OUT_PORT0 0x40
+#define TX422_PORT1 0x20
+#define TX422_PORT0 0x10
+#define DSR_PORT1 0x08
+#define DSR_PORT0 0x04
+#define DTR_PORT1 0x02
+#define DTR_PORT0 0x01
+
+typedef struct port_s {
+ struct net_device *dev;
+ struct card_s *card;
+ spinlock_t lock; /* TX lock */
+ sync_serial_settings settings;
+ int valid; /* port enabled */
+ int rxpart; /* partial frame received, next frame invalid*/
+ unsigned short encoding;
+ unsigned short parity;
+ u16 rxin; /* rx ring buffer 'in' pointer */
+ u16 txin; /* tx ring buffer 'in' and 'last' pointers */
+ u16 txlast;
+ u8 rxs, txs, tmc; /* SCA registers */
+ u8 phy_node; /* physical port # - 0 or 1 */
+ u8 log_node; /* logical port # */
+} port_t;
+
+typedef struct card_s {
+ u8 __iomem *winbase; /* ISA window base address */
+ u32 phy_winbase; /* ISA physical base address */
+ u32 ram_size; /* number of bytes */
+ u16 io; /* IO Base address */
+ u16 buff_offset; /* offset of first buffer of first channel */
+ u16 rx_ring_buffers; /* number of buffers in a ring */
+ u16 tx_ring_buffers;
+ u8 irq; /* IRQ (3-15) */
+
+ port_t ports[2];
+ struct card_s *next_card;
+} card_t;
+
+static card_t *first_card;
+static card_t **new_card = &first_card;
+
+#define sca_reg(reg, card) (0x8000 | (card)->io | \
+ ((reg) & 0x0F) | (((reg) & 0xF0) << 6))
+#define sca_in(reg, card) inb(sca_reg(reg, card))
+#define sca_out(value, reg, card) outb(value, sca_reg(reg, card))
+#define sca_inw(reg, card) inw(sca_reg(reg, card))
+#define sca_outw(value, reg, card) outw(value, sca_reg(reg, card))
+
+#define port_to_card(port) ((port)->card)
+#define log_node(port) ((port)->log_node)
+#define phy_node(port) ((port)->phy_node)
+#define winsize(card) (USE_WINDOWSIZE)
+#define winbase(card) ((card)->winbase)
+#define get_port(card, port) ((card)->ports[port].valid ? \
+ &(card)->ports[port] : NULL)
+
+static __inline__ u8 sca_get_page(card_t *card)
+{
+ return inb(card->io + N2_PSR) & PSR_PAGEBITS;
+}
+
+static __inline__ void openwin(card_t *card, u8 page)
+{
+ u8 psr = inb(card->io + N2_PSR);
+
+ outb((psr & ~PSR_PAGEBITS) | page, card->io + N2_PSR);
+}
+
+#include "hd64570.c"
+
+static void n2_set_iface(port_t *port)
+{
+ card_t *card = port->card;
+ int io = card->io;
+ u8 mcr = inb(io + N2_MCR);
+ u8 msci = get_msci(port);
+ u8 rxs = port->rxs & CLK_BRG_MASK;
+ u8 txs = port->txs & CLK_BRG_MASK;
+
+ switch (port->settings.clock_type) {
+ case CLOCK_INT:
+ mcr |= port->phy_node ? CLOCK_OUT_PORT1 : CLOCK_OUT_PORT0;
+ rxs |= CLK_BRG_RX; /* BRG output */
+ txs |= CLK_RXCLK_TX; /* RX clock */
+ break;
+
+ case CLOCK_TXINT:
+ mcr |= port->phy_node ? CLOCK_OUT_PORT1 : CLOCK_OUT_PORT0;
+ rxs |= CLK_LINE_RX; /* RXC input */
+ txs |= CLK_BRG_TX; /* BRG output */
+ break;
+
+ case CLOCK_TXFROMRX:
+ mcr |= port->phy_node ? CLOCK_OUT_PORT1 : CLOCK_OUT_PORT0;
+ rxs |= CLK_LINE_RX; /* RXC input */
+ txs |= CLK_RXCLK_TX; /* RX clock */
+ break;
+
+ default: /* Clock EXTernal */
+ mcr &= port->phy_node ? ~CLOCK_OUT_PORT1 : ~CLOCK_OUT_PORT0;
+ rxs |= CLK_LINE_RX; /* RXC input */
+ txs |= CLK_LINE_TX; /* TXC input */
+ }
+
+ outb(mcr, io + N2_MCR);
+ port->rxs = rxs;
+ port->txs = txs;
+ sca_out(rxs, msci + RXS, card);
+ sca_out(txs, msci + TXS, card);
+ sca_set_port(port);
+}
+
+static int n2_open(struct net_device *dev)
+{
+ port_t *port = dev_to_port(dev);
+ int io = port->card->io;
+ u8 mcr = inb(io + N2_MCR) |
+ (port->phy_node ? TX422_PORT1 : TX422_PORT0);
+ int result;
+
+ result = hdlc_open(dev);
+ if (result)
+ return result;
+
+ mcr &= port->phy_node ? ~DTR_PORT1 : ~DTR_PORT0; /* set DTR ON */
+ outb(mcr, io + N2_MCR);
+
+ outb(inb(io + N2_PCR) | PCR_ENWIN, io + N2_PCR); /* open window */
+ outb(inb(io + N2_PSR) | PSR_DMAEN, io + N2_PSR); /* enable dma */
+ sca_open(dev);
+ n2_set_iface(port);
+ return 0;
+}
+
+static int n2_close(struct net_device *dev)
+{
+ port_t *port = dev_to_port(dev);
+ int io = port->card->io;
+ u8 mcr = inb(io + N2_MCR) |
+ (port->phy_node ? TX422_PORT1 : TX422_PORT0);
+
+ sca_close(dev);
+ mcr |= port->phy_node ? DTR_PORT1 : DTR_PORT0; /* set DTR OFF */
+ outb(mcr, io + N2_MCR);
+ hdlc_close(dev);
+ return 0;
+}
+
+static int n2_siocdevprivate(struct net_device *dev, struct ifreq *ifr,
+ void __user *data, int cmd)
+{
+#ifdef DEBUG_RINGS
+ if (cmd == SIOCDEVPRIVATE) {
+ sca_dump_rings(dev);
+ return 0;
+ }
+#endif
+ return -EOPNOTSUPP;
+}
+
+static int n2_ioctl(struct net_device *dev, struct if_settings *ifs)
+{
+ const size_t size = sizeof(sync_serial_settings);
+ sync_serial_settings new_line;
+ sync_serial_settings __user *line = ifs->ifs_ifsu.sync;
+ port_t *port = dev_to_port(dev);
+
+ switch (ifs->type) {
+ case IF_GET_IFACE:
+ ifs->type = IF_IFACE_SYNC_SERIAL;
+ if (ifs->size < size) {
+ ifs->size = size; /* data size wanted */
+ return -ENOBUFS;
+ }
+ if (copy_to_user(line, &port->settings, size))
+ return -EFAULT;
+ return 0;
+
+ case IF_IFACE_SYNC_SERIAL:
+ if (!capable(CAP_NET_ADMIN))
+ return -EPERM;
+
+ if (copy_from_user(&new_line, line, size))
+ return -EFAULT;
+
+ if (new_line.clock_type != CLOCK_EXT &&
+ new_line.clock_type != CLOCK_TXFROMRX &&
+ new_line.clock_type != CLOCK_INT &&
+ new_line.clock_type != CLOCK_TXINT)
+ return -EINVAL; /* No such clock setting */
+
+ if (new_line.loopback != 0 && new_line.loopback != 1)
+ return -EINVAL;
+
+ memcpy(&port->settings, &new_line, size); /* Update settings */
+ n2_set_iface(port);
+ return 0;
+
+ default:
+ return hdlc_ioctl(dev, ifs);
+ }
+}
+
+static void n2_destroy_card(card_t *card)
+{
+ int cnt;
+
+ for (cnt = 0; cnt < 2; cnt++)
+ if (card->ports[cnt].card) {
+ struct net_device *dev = port_to_dev(&card->ports[cnt]);
+
+ unregister_hdlc_device(dev);
+ }
+
+ if (card->irq)
+ free_irq(card->irq, card);
+
+ if (card->winbase) {
+ iounmap(card->winbase);
+ release_mem_region(card->phy_winbase, USE_WINDOWSIZE);
+ }
+
+ if (card->io)
+ release_region(card->io, N2_IOPORTS);
+ if (card->ports[0].dev)
+ free_netdev(card->ports[0].dev);
+ if (card->ports[1].dev)
+ free_netdev(card->ports[1].dev);
+ kfree(card);
+}
+
+static const struct net_device_ops n2_ops = {
+ .ndo_open = n2_open,
+ .ndo_stop = n2_close,
+ .ndo_start_xmit = hdlc_start_xmit,
+ .ndo_siocwandev = n2_ioctl,
+ .ndo_siocdevprivate = n2_siocdevprivate,
+};
+
+static int __init n2_run(unsigned long io, unsigned long irq,
+ unsigned long winbase, long valid0, long valid1)
+{
+ card_t *card;
+ u8 cnt, pcr;
+ int i;
+
+ if (io < 0x200 || io > 0x3FF || (io % N2_IOPORTS) != 0) {
+ pr_err("invalid I/O port value\n");
+ return -ENODEV;
+ }
+
+ if (irq < 3 || irq > 15 || irq == 6) /* FIXME */ {
+ pr_err("invalid IRQ value\n");
+ return -ENODEV;
+ }
+
+ if (winbase < 0xA0000 || winbase > 0xFFFFF || (winbase & 0xFFF) != 0) {
+ pr_err("invalid RAM value\n");
+ return -ENODEV;
+ }
+
+ card = kzalloc(sizeof(card_t), GFP_KERNEL);
+ if (!card)
+ return -ENOBUFS;
+
+ card->ports[0].dev = alloc_hdlcdev(&card->ports[0]);
+ card->ports[1].dev = alloc_hdlcdev(&card->ports[1]);
+ if (!card->ports[0].dev || !card->ports[1].dev) {
+ pr_err("unable to allocate memory\n");
+ n2_destroy_card(card);
+ return -ENOMEM;
+ }
+
+ if (!request_region(io, N2_IOPORTS, devname)) {
+ pr_err("I/O port region in use\n");
+ n2_destroy_card(card);
+ return -EBUSY;
+ }
+ card->io = io;
+
+ if (request_irq(irq, sca_intr, 0, devname, card)) {
+ pr_err("could not allocate IRQ\n");
+ n2_destroy_card(card);
+ return -EBUSY;
+ }
+ card->irq = irq;
+
+ if (!request_mem_region(winbase, USE_WINDOWSIZE, devname)) {
+ pr_err("could not request RAM window\n");
+ n2_destroy_card(card);
+ return -EBUSY;
+ }
+ card->phy_winbase = winbase;
+ card->winbase = ioremap(winbase, USE_WINDOWSIZE);
+ if (!card->winbase) {
+ pr_err("ioremap() failed\n");
+ n2_destroy_card(card);
+ return -EFAULT;
+ }
+
+ outb(0, io + N2_PCR);
+ outb(winbase >> 12, io + N2_BAR);
+
+ switch (USE_WINDOWSIZE) {
+ case 16384:
+ outb(WIN16K, io + N2_PSR);
+ break;
+
+ case 32768:
+ outb(WIN32K, io + N2_PSR);
+ break;
+
+ case 65536:
+ outb(WIN64K, io + N2_PSR);
+ break;
+
+ default:
+ pr_err("invalid window size\n");
+ n2_destroy_card(card);
+ return -ENODEV;
+ }
+
+ pcr = PCR_ENWIN | PCR_VPM | (USE_BUS16BITS ? PCR_BUS16 : 0);
+ outb(pcr, io + N2_PCR);
+
+ card->ram_size = sca_detect_ram(card, card->winbase, MAX_RAM_SIZE);
+
+ /* number of TX + RX buffers for one port */
+ i = card->ram_size / ((valid0 + valid1) * (sizeof(pkt_desc) +
+ HDLC_MAX_MRU));
+
+ card->tx_ring_buffers = min(i / 2, MAX_TX_BUFFERS);
+ card->rx_ring_buffers = i - card->tx_ring_buffers;
+
+ card->buff_offset = (valid0 + valid1) * sizeof(pkt_desc) *
+ (card->tx_ring_buffers + card->rx_ring_buffers);
+
+ pr_info("RISCom/N2 %u KB RAM, IRQ%u, using %u TX + %u RX packets rings\n",
+ card->ram_size / 1024, card->irq,
+ card->tx_ring_buffers, card->rx_ring_buffers);
+
+ if (card->tx_ring_buffers < 1) {
+ pr_err("RAM test failed\n");
+ n2_destroy_card(card);
+ return -EIO;
+ }
+
+ pcr |= PCR_RUNSCA; /* run SCA */
+ outb(pcr, io + N2_PCR);
+ outb(0, io + N2_MCR);
+
+ sca_init(card, 0);
+ for (cnt = 0; cnt < 2; cnt++) {
+ port_t *port = &card->ports[cnt];
+ struct net_device *dev = port_to_dev(port);
+ hdlc_device *hdlc = dev_to_hdlc(dev);
+
+ if ((cnt == 0 && !valid0) || (cnt == 1 && !valid1))
+ continue;
+
+ port->phy_node = cnt;
+ port->valid = 1;
+
+ if ((cnt == 1) && valid0)
+ port->log_node = 1;
+
+ spin_lock_init(&port->lock);
+ dev->irq = irq;
+ dev->mem_start = winbase;
+ dev->mem_end = winbase + USE_WINDOWSIZE - 1;
+ dev->tx_queue_len = 50;
+ dev->netdev_ops = &n2_ops;
+ hdlc->attach = sca_attach;
+ hdlc->xmit = sca_xmit;
+ port->settings.clock_type = CLOCK_EXT;
+ port->card = card;
+
+ if (register_hdlc_device(dev)) {
+ pr_warn("unable to register hdlc device\n");
+ port->card = NULL;
+ n2_destroy_card(card);
+ return -ENOBUFS;
+ }
+ sca_init_port(port); /* Set up SCA memory */
+
+ netdev_info(dev, "RISCom/N2 node %d\n", port->phy_node);
+ }
+
+ *new_card = card;
+ new_card = &card->next_card;
+
+ return 0;
+}
+
+static int __init n2_init(void)
+{
+ if (!hw) {
+#ifdef MODULE
+ pr_info("no card initialized\n");
+#endif
+ return -EINVAL; /* no parameters specified, abort */
+ }
+
+ pr_info("%s\n", version);
+
+ do {
+ unsigned long io, irq, ram;
+ long valid[2] = { 0, 0 }; /* Default = both ports disabled */
+
+ io = simple_strtoul(hw, &hw, 0);
+
+ if (*hw++ != ',')
+ break;
+ irq = simple_strtoul(hw, &hw, 0);
+
+ if (*hw++ != ',')
+ break;
+ ram = simple_strtoul(hw, &hw, 0);
+
+ if (*hw++ != ',')
+ break;
+ while (1) {
+ if (*hw == '0' && !valid[0])
+ valid[0] = 1; /* Port 0 enabled */
+ else if (*hw == '1' && !valid[1])
+ valid[1] = 1; /* Port 1 enabled */
+ else
+ break;
+ hw++;
+ }
+
+ if (!valid[0] && !valid[1])
+ break; /* at least one port must be used */
+
+ if (*hw == ':' || *hw == '\x0')
+ n2_run(io, irq, ram, valid[0], valid[1]);
+
+ if (*hw == '\x0')
+ return first_card ? 0 : -EINVAL;
+ } while (*hw++ == ':');
+
+ pr_err("invalid hardware parameters\n");
+ return first_card ? 0 : -EINVAL;
+}
+
+static void __exit n2_cleanup(void)
+{
+ card_t *card = first_card;
+
+ while (card) {
+ card_t *ptr = card;
+
+ card = card->next_card;
+ n2_destroy_card(ptr);
+ }
+}
+
+module_init(n2_init);
+module_exit(n2_cleanup);
+
+MODULE_AUTHOR("Krzysztof Halasa <khc@pm.waw.pl>");
+MODULE_DESCRIPTION("RISCom/N2 serial port driver");
+MODULE_LICENSE("GPL v2");
+module_param(hw, charp, 0444);
+MODULE_PARM_DESC(hw, "io,irq,ram,ports:io,irq,...");
diff --git a/drivers/net/wan/pc300too.c b/drivers/net/wan/pc300too.c
new file mode 100644
index 000000000..4766446f0
--- /dev/null
+++ b/drivers/net/wan/pc300too.c
@@ -0,0 +1,513 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Cyclades PC300 synchronous serial card driver for Linux
+ *
+ * Copyright (C) 2000-2008 Krzysztof Halasa <khc@pm.waw.pl>
+ *
+ * For information see <https://www.kernel.org/pub/linux/utils/net/hdlc/>.
+ *
+ * Sources of information:
+ * Hitachi HD64572 SCA-II User's Manual
+ * Original Cyclades PC300 Linux driver
+ *
+ * This driver currently supports only PC300/RSV (V.24/V.35) and
+ * PC300/X21 cards.
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/sched.h>
+#include <linux/types.h>
+#include <linux/fcntl.h>
+#include <linux/in.h>
+#include <linux/string.h>
+#include <linux/errno.h>
+#include <linux/init.h>
+#include <linux/ioport.h>
+#include <linux/moduleparam.h>
+#include <linux/netdevice.h>
+#include <linux/hdlc.h>
+#include <linux/pci.h>
+#include <linux/delay.h>
+#include <asm/io.h>
+
+#include "hd64572.h"
+
+#undef DEBUG_PKT
+#define DEBUG_RINGS
+
+#define PC300_PLX_SIZE 0x80 /* PLX control window size (128 B) */
+#define PC300_SCA_SIZE 0x400 /* SCA window size (1 KB) */
+#define MAX_TX_BUFFERS 10
+
+static int pci_clock_freq = 33000000;
+static int use_crystal_clock;
+static unsigned int CLOCK_BASE;
+
+/* Masks to access the init_ctrl PLX register */
+#define PC300_CLKSEL_MASK (0x00000004UL)
+#define PC300_CHMEDIA_MASK(port) (0x00000020UL << ((port) * 3))
+#define PC300_CTYPE_MASK (0x00000800UL)
+
+enum { PC300_RSV = 1, PC300_X21, PC300_TE }; /* card types */
+
+/* PLX PCI9050-1 local configuration and shared runtime registers.
+ * This structure can be used to access 9050 registers (memory mapped).
+ */
+typedef struct {
+ u32 loc_addr_range[4]; /* 00-0Ch : Local Address Ranges */
+ u32 loc_rom_range; /* 10h : Local ROM Range */
+ u32 loc_addr_base[4]; /* 14-20h : Local Address Base Addrs */
+ u32 loc_rom_base; /* 24h : Local ROM Base */
+ u32 loc_bus_descr[4]; /* 28-34h : Local Bus Descriptors */
+ u32 rom_bus_descr; /* 38h : ROM Bus Descriptor */
+ u32 cs_base[4]; /* 3C-48h : Chip Select Base Addrs */
+ u32 intr_ctrl_stat; /* 4Ch : Interrupt Control/Status */
+ u32 init_ctrl; /* 50h : EEPROM ctrl, Init Ctrl, etc */
+} plx9050;
+
+typedef struct port_s {
+ struct napi_struct napi;
+ struct net_device *netdev;
+ struct card_s *card;
+ spinlock_t lock; /* TX lock */
+ sync_serial_settings settings;
+ int rxpart; /* partial frame received, next frame invalid*/
+ unsigned short encoding;
+ unsigned short parity;
+ unsigned int iface;
+ u16 rxin; /* rx ring buffer 'in' pointer */
+ u16 txin; /* tx ring buffer 'in' and 'last' pointers */
+ u16 txlast;
+ u8 rxs, txs, tmc; /* SCA registers */
+ u8 chan; /* physical port # - 0 or 1 */
+} port_t;
+
+typedef struct card_s {
+ int type; /* RSV, X21, etc. */
+ int n_ports; /* 1 or 2 ports */
+ u8 __iomem *rambase; /* buffer memory base (virtual) */
+ u8 __iomem *scabase; /* SCA memory base (virtual) */
+ plx9050 __iomem *plxbase; /* PLX registers memory base (virtual) */
+ u32 init_ctrl_value; /* Saved value - 9050 bug workaround */
+ u16 rx_ring_buffers; /* number of buffers in a ring */
+ u16 tx_ring_buffers;
+ u16 buff_offset; /* offset of first buffer of first channel */
+ u8 irq; /* interrupt request level */
+
+ port_t ports[2];
+} card_t;
+
+#define get_port(card, port) ((port) < (card)->n_ports ? \
+ (&(card)->ports[port]) : (NULL))
+
+#include "hd64572.c"
+
+static void pc300_set_iface(port_t *port)
+{
+ card_t *card = port->card;
+ u32 __iomem *init_ctrl = &card->plxbase->init_ctrl;
+ u16 msci = get_msci(port);
+ u8 rxs = port->rxs & CLK_BRG_MASK;
+ u8 txs = port->txs & CLK_BRG_MASK;
+
+ sca_out(EXS_TES1, (port->chan ? MSCI1_OFFSET : MSCI0_OFFSET) + EXS,
+ port->card);
+ switch (port->settings.clock_type) {
+ case CLOCK_INT:
+ rxs |= CLK_BRG; /* BRG output */
+ txs |= CLK_PIN_OUT | CLK_TX_RXCLK; /* RX clock */
+ break;
+
+ case CLOCK_TXINT:
+ rxs |= CLK_LINE; /* RXC input */
+ txs |= CLK_PIN_OUT | CLK_BRG; /* BRG output */
+ break;
+
+ case CLOCK_TXFROMRX:
+ rxs |= CLK_LINE; /* RXC input */
+ txs |= CLK_PIN_OUT | CLK_TX_RXCLK; /* RX clock */
+ break;
+
+ default: /* EXTernal clock */
+ rxs |= CLK_LINE; /* RXC input */
+ txs |= CLK_PIN_OUT | CLK_LINE; /* TXC input */
+ break;
+ }
+
+ port->rxs = rxs;
+ port->txs = txs;
+ sca_out(rxs, msci + RXS, card);
+ sca_out(txs, msci + TXS, card);
+ sca_set_port(port);
+
+ if (port->card->type == PC300_RSV) {
+ if (port->iface == IF_IFACE_V35)
+ writel(card->init_ctrl_value |
+ PC300_CHMEDIA_MASK(port->chan), init_ctrl);
+ else
+ writel(card->init_ctrl_value &
+ ~PC300_CHMEDIA_MASK(port->chan), init_ctrl);
+ }
+}
+
+static int pc300_open(struct net_device *dev)
+{
+ port_t *port = dev_to_port(dev);
+ int result = hdlc_open(dev);
+
+ if (result)
+ return result;
+
+ sca_open(dev);
+ pc300_set_iface(port);
+ return 0;
+}
+
+static int pc300_close(struct net_device *dev)
+{
+ sca_close(dev);
+ hdlc_close(dev);
+ return 0;
+}
+
+static int pc300_siocdevprivate(struct net_device *dev, struct ifreq *ifr,
+ void __user *data, int cmd)
+{
+#ifdef DEBUG_RINGS
+ if (cmd == SIOCDEVPRIVATE) {
+ sca_dump_rings(dev);
+ return 0;
+ }
+#endif
+ return -EOPNOTSUPP;
+}
+
+static int pc300_ioctl(struct net_device *dev, struct if_settings *ifs)
+{
+ const size_t size = sizeof(sync_serial_settings);
+ sync_serial_settings new_line;
+ sync_serial_settings __user *line = ifs->ifs_ifsu.sync;
+ int new_type;
+ port_t *port = dev_to_port(dev);
+
+ if (ifs->type == IF_GET_IFACE) {
+ ifs->type = port->iface;
+ if (ifs->size < size) {
+ ifs->size = size; /* data size wanted */
+ return -ENOBUFS;
+ }
+ if (copy_to_user(line, &port->settings, size))
+ return -EFAULT;
+ return 0;
+ }
+
+ if (port->card->type == PC300_X21 &&
+ (ifs->type == IF_IFACE_SYNC_SERIAL ||
+ ifs->type == IF_IFACE_X21))
+ new_type = IF_IFACE_X21;
+
+ else if (port->card->type == PC300_RSV &&
+ (ifs->type == IF_IFACE_SYNC_SERIAL ||
+ ifs->type == IF_IFACE_V35))
+ new_type = IF_IFACE_V35;
+
+ else if (port->card->type == PC300_RSV &&
+ ifs->type == IF_IFACE_V24)
+ new_type = IF_IFACE_V24;
+
+ else
+ return hdlc_ioctl(dev, ifs);
+
+ if (!capable(CAP_NET_ADMIN))
+ return -EPERM;
+
+ if (copy_from_user(&new_line, line, size))
+ return -EFAULT;
+
+ if (new_line.clock_type != CLOCK_EXT &&
+ new_line.clock_type != CLOCK_TXFROMRX &&
+ new_line.clock_type != CLOCK_INT &&
+ new_line.clock_type != CLOCK_TXINT)
+ return -EINVAL; /* No such clock setting */
+
+ if (new_line.loopback != 0 && new_line.loopback != 1)
+ return -EINVAL;
+
+ memcpy(&port->settings, &new_line, size); /* Update settings */
+ port->iface = new_type;
+ pc300_set_iface(port);
+ return 0;
+}
+
+static void pc300_pci_remove_one(struct pci_dev *pdev)
+{
+ int i;
+ card_t *card = pci_get_drvdata(pdev);
+
+ for (i = 0; i < 2; i++)
+ if (card->ports[i].card)
+ unregister_hdlc_device(card->ports[i].netdev);
+
+ if (card->irq)
+ free_irq(card->irq, card);
+
+ if (card->rambase)
+ iounmap(card->rambase);
+ if (card->scabase)
+ iounmap(card->scabase);
+ if (card->plxbase)
+ iounmap(card->plxbase);
+
+ pci_release_regions(pdev);
+ pci_disable_device(pdev);
+ if (card->ports[0].netdev)
+ free_netdev(card->ports[0].netdev);
+ if (card->ports[1].netdev)
+ free_netdev(card->ports[1].netdev);
+ kfree(card);
+}
+
+static const struct net_device_ops pc300_ops = {
+ .ndo_open = pc300_open,
+ .ndo_stop = pc300_close,
+ .ndo_start_xmit = hdlc_start_xmit,
+ .ndo_siocwandev = pc300_ioctl,
+ .ndo_siocdevprivate = pc300_siocdevprivate,
+};
+
+static int pc300_pci_init_one(struct pci_dev *pdev,
+ const struct pci_device_id *ent)
+{
+ card_t *card;
+ u32 __iomem *p;
+ int i;
+ u32 ramsize;
+ u32 ramphys; /* buffer memory base */
+ u32 scaphys; /* SCA memory base */
+ u32 plxphys; /* PLX registers memory base */
+
+ i = pci_enable_device(pdev);
+ if (i)
+ return i;
+
+ i = pci_request_regions(pdev, "PC300");
+ if (i) {
+ pci_disable_device(pdev);
+ return i;
+ }
+
+ card = kzalloc(sizeof(card_t), GFP_KERNEL);
+ if (!card) {
+ pci_release_regions(pdev);
+ pci_disable_device(pdev);
+ return -ENOBUFS;
+ }
+ pci_set_drvdata(pdev, card);
+
+ if (pci_resource_len(pdev, 0) != PC300_PLX_SIZE ||
+ pci_resource_len(pdev, 2) != PC300_SCA_SIZE ||
+ pci_resource_len(pdev, 3) < 16384) {
+ pr_err("invalid card EEPROM parameters\n");
+ pc300_pci_remove_one(pdev);
+ return -EFAULT;
+ }
+
+ plxphys = pci_resource_start(pdev, 0) & PCI_BASE_ADDRESS_MEM_MASK;
+ card->plxbase = ioremap(plxphys, PC300_PLX_SIZE);
+
+ scaphys = pci_resource_start(pdev, 2) & PCI_BASE_ADDRESS_MEM_MASK;
+ card->scabase = ioremap(scaphys, PC300_SCA_SIZE);
+
+ ramphys = pci_resource_start(pdev, 3) & PCI_BASE_ADDRESS_MEM_MASK;
+ card->rambase = pci_ioremap_bar(pdev, 3);
+
+ if (!card->plxbase || !card->scabase || !card->rambase) {
+ pr_err("ioremap() failed\n");
+ pc300_pci_remove_one(pdev);
+ return -ENOMEM;
+ }
+
+ /* PLX PCI 9050 workaround for local configuration register read bug */
+ pci_write_config_dword(pdev, PCI_BASE_ADDRESS_0, scaphys);
+ card->init_ctrl_value = readl(&((plx9050 __iomem *)card->scabase)->init_ctrl);
+ pci_write_config_dword(pdev, PCI_BASE_ADDRESS_0, plxphys);
+
+ if (pdev->device == PCI_DEVICE_ID_PC300_TE_1 ||
+ pdev->device == PCI_DEVICE_ID_PC300_TE_2)
+ card->type = PC300_TE; /* not fully supported */
+ else if (card->init_ctrl_value & PC300_CTYPE_MASK)
+ card->type = PC300_X21;
+ else
+ card->type = PC300_RSV;
+
+ if (pdev->device == PCI_DEVICE_ID_PC300_RX_1 ||
+ pdev->device == PCI_DEVICE_ID_PC300_TE_1)
+ card->n_ports = 1;
+ else
+ card->n_ports = 2;
+
+ for (i = 0; i < card->n_ports; i++) {
+ card->ports[i].netdev = alloc_hdlcdev(&card->ports[i]);
+ if (!card->ports[i].netdev) {
+ pr_err("unable to allocate memory\n");
+ pc300_pci_remove_one(pdev);
+ return -ENOMEM;
+ }
+ }
+
+ /* Reset PLX */
+ p = &card->plxbase->init_ctrl;
+ writel(card->init_ctrl_value | 0x40000000, p);
+ readl(p); /* Flush the write - do not use sca_flush */
+ udelay(1);
+
+ writel(card->init_ctrl_value, p);
+ readl(p); /* Flush the write - do not use sca_flush */
+ udelay(1);
+
+ /* Reload Config. Registers from EEPROM */
+ writel(card->init_ctrl_value | 0x20000000, p);
+ readl(p); /* Flush the write - do not use sca_flush */
+ udelay(1);
+
+ writel(card->init_ctrl_value, p);
+ readl(p); /* Flush the write - do not use sca_flush */
+ udelay(1);
+
+ ramsize = sca_detect_ram(card, card->rambase,
+ pci_resource_len(pdev, 3));
+
+ if (use_crystal_clock)
+ card->init_ctrl_value &= ~PC300_CLKSEL_MASK;
+ else
+ card->init_ctrl_value |= PC300_CLKSEL_MASK;
+
+ writel(card->init_ctrl_value, &card->plxbase->init_ctrl);
+ /* number of TX + RX buffers for one port */
+ i = ramsize / (card->n_ports * (sizeof(pkt_desc) + HDLC_MAX_MRU));
+ card->tx_ring_buffers = min(i / 2, MAX_TX_BUFFERS);
+ card->rx_ring_buffers = i - card->tx_ring_buffers;
+
+ card->buff_offset = card->n_ports * sizeof(pkt_desc) *
+ (card->tx_ring_buffers + card->rx_ring_buffers);
+
+ pr_info("PC300/%s, %u KB RAM at 0x%x, IRQ%u, using %u TX + %u RX packets rings\n",
+ card->type == PC300_X21 ? "X21" :
+ card->type == PC300_TE ? "TE" : "RSV",
+ ramsize / 1024, ramphys, pdev->irq,
+ card->tx_ring_buffers, card->rx_ring_buffers);
+
+ if (card->tx_ring_buffers < 1) {
+ pr_err("RAM test failed\n");
+ pc300_pci_remove_one(pdev);
+ return -EFAULT;
+ }
+
+ /* Enable interrupts on the PCI bridge, LINTi1 active low */
+ writew(0x0041, &card->plxbase->intr_ctrl_stat);
+
+ /* Allocate IRQ */
+ if (request_irq(pdev->irq, sca_intr, IRQF_SHARED, "pc300", card)) {
+ pr_warn("could not allocate IRQ%d\n", pdev->irq);
+ pc300_pci_remove_one(pdev);
+ return -EBUSY;
+ }
+ card->irq = pdev->irq;
+
+ sca_init(card, 0);
+
+ // COTE not set - allows better TX DMA settings
+ // sca_out(sca_in(PCR, card) | PCR_COTE, PCR, card);
+
+ sca_out(0x10, BTCR, card);
+
+ for (i = 0; i < card->n_ports; i++) {
+ port_t *port = &card->ports[i];
+ struct net_device *dev = port->netdev;
+ hdlc_device *hdlc = dev_to_hdlc(dev);
+
+ port->chan = i;
+
+ spin_lock_init(&port->lock);
+ dev->irq = card->irq;
+ dev->mem_start = ramphys;
+ dev->mem_end = ramphys + ramsize - 1;
+ dev->tx_queue_len = 50;
+ dev->netdev_ops = &pc300_ops;
+ hdlc->attach = sca_attach;
+ hdlc->xmit = sca_xmit;
+ port->settings.clock_type = CLOCK_EXT;
+ port->card = card;
+ if (card->type == PC300_X21)
+ port->iface = IF_IFACE_X21;
+ else
+ port->iface = IF_IFACE_V35;
+
+ sca_init_port(port);
+ if (register_hdlc_device(dev)) {
+ pr_err("unable to register hdlc device\n");
+ port->card = NULL;
+ pc300_pci_remove_one(pdev);
+ return -ENOBUFS;
+ }
+
+ netdev_info(dev, "PC300 channel %d\n", port->chan);
+ }
+ return 0;
+}
+
+static const struct pci_device_id pc300_pci_tbl[] = {
+ { PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_PC300_RX_1, PCI_ANY_ID,
+ PCI_ANY_ID, 0, 0, 0 },
+ { PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_PC300_RX_2, PCI_ANY_ID,
+ PCI_ANY_ID, 0, 0, 0 },
+ { PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_PC300_TE_1, PCI_ANY_ID,
+ PCI_ANY_ID, 0, 0, 0 },
+ { PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_PC300_TE_2, PCI_ANY_ID,
+ PCI_ANY_ID, 0, 0, 0 },
+ { 0, }
+};
+
+static struct pci_driver pc300_pci_driver = {
+ .name = "PC300",
+ .id_table = pc300_pci_tbl,
+ .probe = pc300_pci_init_one,
+ .remove = pc300_pci_remove_one,
+};
+
+static int __init pc300_init_module(void)
+{
+ if (pci_clock_freq < 1000000 || pci_clock_freq > 80000000) {
+ pr_err("Invalid PCI clock frequency\n");
+ return -EINVAL;
+ }
+ if (use_crystal_clock != 0 && use_crystal_clock != 1) {
+ pr_err("Invalid 'use_crystal_clock' value\n");
+ return -EINVAL;
+ }
+
+ CLOCK_BASE = use_crystal_clock ? 24576000 : pci_clock_freq;
+
+ return pci_register_driver(&pc300_pci_driver);
+}
+
+static void __exit pc300_cleanup_module(void)
+{
+ pci_unregister_driver(&pc300_pci_driver);
+}
+
+MODULE_AUTHOR("Krzysztof Halasa <khc@pm.waw.pl>");
+MODULE_DESCRIPTION("Cyclades PC300 serial port driver");
+MODULE_LICENSE("GPL v2");
+MODULE_DEVICE_TABLE(pci, pc300_pci_tbl);
+module_param(pci_clock_freq, int, 0444);
+MODULE_PARM_DESC(pci_clock_freq, "System PCI clock frequency in Hz");
+module_param(use_crystal_clock, int, 0444);
+MODULE_PARM_DESC(use_crystal_clock,
+ "Use 24.576 MHz clock instead of PCI clock");
+module_init(pc300_init_module);
+module_exit(pc300_cleanup_module);
diff --git a/drivers/net/wan/pci200syn.c b/drivers/net/wan/pci200syn.c
new file mode 100644
index 000000000..ea86c7035
--- /dev/null
+++ b/drivers/net/wan/pci200syn.c
@@ -0,0 +1,433 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Goramo PCI200SYN synchronous serial card driver for Linux
+ *
+ * Copyright (C) 2002-2008 Krzysztof Halasa <khc@pm.waw.pl>
+ *
+ * For information see <https://www.kernel.org/pub/linux/utils/net/hdlc/>
+ *
+ * Sources of information:
+ * Hitachi HD64572 SCA-II User's Manual
+ * PLX Technology Inc. PCI9052 Data Book
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/capability.h>
+#include <linux/slab.h>
+#include <linux/types.h>
+#include <linux/fcntl.h>
+#include <linux/in.h>
+#include <linux/string.h>
+#include <linux/errno.h>
+#include <linux/init.h>
+#include <linux/ioport.h>
+#include <linux/netdevice.h>
+#include <linux/hdlc.h>
+#include <linux/pci.h>
+#include <linux/delay.h>
+#include <asm/io.h>
+
+#include "hd64572.h"
+
+#undef DEBUG_PKT
+#define DEBUG_RINGS
+
+#define PCI200SYN_PLX_SIZE 0x80 /* PLX control window size (128b) */
+#define PCI200SYN_SCA_SIZE 0x400 /* SCA window size (1Kb) */
+#define MAX_TX_BUFFERS 10
+
+static int pci_clock_freq = 33000000;
+#define CLOCK_BASE pci_clock_freq
+
+/* PLX PCI9052 local configuration and shared runtime registers.
+ * This structure can be used to access 9052 registers (memory mapped).
+ */
+typedef struct {
+ u32 loc_addr_range[4]; /* 00-0Ch : Local Address Ranges */
+ u32 loc_rom_range; /* 10h : Local ROM Range */
+ u32 loc_addr_base[4]; /* 14-20h : Local Address Base Addrs */
+ u32 loc_rom_base; /* 24h : Local ROM Base */
+ u32 loc_bus_descr[4]; /* 28-34h : Local Bus Descriptors */
+ u32 rom_bus_descr; /* 38h : ROM Bus Descriptor */
+ u32 cs_base[4]; /* 3C-48h : Chip Select Base Addrs */
+ u32 intr_ctrl_stat; /* 4Ch : Interrupt Control/Status */
+ u32 init_ctrl; /* 50h : EEPROM ctrl, Init Ctrl, etc */
+} plx9052;
+
+typedef struct port_s {
+ struct napi_struct napi;
+ struct net_device *netdev;
+ struct card_s *card;
+ spinlock_t lock; /* TX lock */
+ sync_serial_settings settings;
+ int rxpart; /* partial frame received, next frame invalid*/
+ unsigned short encoding;
+ unsigned short parity;
+ u16 rxin; /* rx ring buffer 'in' pointer */
+ u16 txin; /* tx ring buffer 'in' and 'last' pointers */
+ u16 txlast;
+ u8 rxs, txs, tmc; /* SCA registers */
+ u8 chan; /* physical port # - 0 or 1 */
+} port_t;
+
+typedef struct card_s {
+ u8 __iomem *rambase; /* buffer memory base (virtual) */
+ u8 __iomem *scabase; /* SCA memory base (virtual) */
+ plx9052 __iomem *plxbase;/* PLX registers memory base (virtual) */
+ u16 rx_ring_buffers; /* number of buffers in a ring */
+ u16 tx_ring_buffers;
+ u16 buff_offset; /* offset of first buffer of first channel */
+ u8 irq; /* interrupt request level */
+
+ port_t ports[2];
+} card_t;
+
+#define get_port(card, port) (&(card)->ports[port])
+#define sca_flush(card) (sca_in(IER0, card))
+
+static inline void new_memcpy_toio(char __iomem *dest, char *src, int length)
+{
+ int len;
+
+ do {
+ len = length > 256 ? 256 : length;
+ memcpy_toio(dest, src, len);
+ dest += len;
+ src += len;
+ length -= len;
+ readb(dest);
+ } while (len);
+}
+
+#undef memcpy_toio
+#define memcpy_toio new_memcpy_toio
+
+#include "hd64572.c"
+
+static void pci200_set_iface(port_t *port)
+{
+ card_t *card = port->card;
+ u16 msci = get_msci(port);
+ u8 rxs = port->rxs & CLK_BRG_MASK;
+ u8 txs = port->txs & CLK_BRG_MASK;
+
+ sca_out(EXS_TES1, (port->chan ? MSCI1_OFFSET : MSCI0_OFFSET) + EXS,
+ port->card);
+ switch (port->settings.clock_type) {
+ case CLOCK_INT:
+ rxs |= CLK_BRG; /* BRG output */
+ txs |= CLK_PIN_OUT | CLK_TX_RXCLK; /* RX clock */
+ break;
+
+ case CLOCK_TXINT:
+ rxs |= CLK_LINE; /* RXC input */
+ txs |= CLK_PIN_OUT | CLK_BRG; /* BRG output */
+ break;
+
+ case CLOCK_TXFROMRX:
+ rxs |= CLK_LINE; /* RXC input */
+ txs |= CLK_PIN_OUT | CLK_TX_RXCLK; /* RX clock */
+ break;
+
+ default: /* EXTernal clock */
+ rxs |= CLK_LINE; /* RXC input */
+ txs |= CLK_PIN_OUT | CLK_LINE; /* TXC input */
+ break;
+ }
+
+ port->rxs = rxs;
+ port->txs = txs;
+ sca_out(rxs, msci + RXS, card);
+ sca_out(txs, msci + TXS, card);
+ sca_set_port(port);
+}
+
+static int pci200_open(struct net_device *dev)
+{
+ port_t *port = dev_to_port(dev);
+ int result = hdlc_open(dev);
+
+ if (result)
+ return result;
+
+ sca_open(dev);
+ pci200_set_iface(port);
+ sca_flush(port->card);
+ return 0;
+}
+
+static int pci200_close(struct net_device *dev)
+{
+ sca_close(dev);
+ sca_flush(dev_to_port(dev)->card);
+ hdlc_close(dev);
+ return 0;
+}
+
+static int pci200_siocdevprivate(struct net_device *dev, struct ifreq *ifr,
+ void __user *data, int cmd)
+{
+#ifdef DEBUG_RINGS
+ if (cmd == SIOCDEVPRIVATE) {
+ sca_dump_rings(dev);
+ return 0;
+ }
+#endif
+ return -EOPNOTSUPP;
+}
+
+static int pci200_ioctl(struct net_device *dev, struct if_settings *ifs)
+{
+ const size_t size = sizeof(sync_serial_settings);
+ sync_serial_settings new_line;
+ sync_serial_settings __user *line = ifs->ifs_ifsu.sync;
+ port_t *port = dev_to_port(dev);
+
+ switch (ifs->type) {
+ case IF_GET_IFACE:
+ ifs->type = IF_IFACE_V35;
+ if (ifs->size < size) {
+ ifs->size = size; /* data size wanted */
+ return -ENOBUFS;
+ }
+ if (copy_to_user(line, &port->settings, size))
+ return -EFAULT;
+ return 0;
+
+ case IF_IFACE_V35:
+ case IF_IFACE_SYNC_SERIAL:
+ if (!capable(CAP_NET_ADMIN))
+ return -EPERM;
+
+ if (copy_from_user(&new_line, line, size))
+ return -EFAULT;
+
+ if (new_line.clock_type != CLOCK_EXT &&
+ new_line.clock_type != CLOCK_TXFROMRX &&
+ new_line.clock_type != CLOCK_INT &&
+ new_line.clock_type != CLOCK_TXINT)
+ return -EINVAL; /* No such clock setting */
+
+ if (new_line.loopback != 0 && new_line.loopback != 1)
+ return -EINVAL;
+
+ memcpy(&port->settings, &new_line, size); /* Update settings */
+ pci200_set_iface(port);
+ sca_flush(port->card);
+ return 0;
+
+ default:
+ return hdlc_ioctl(dev, ifs);
+ }
+}
+
+static void pci200_pci_remove_one(struct pci_dev *pdev)
+{
+ int i;
+ card_t *card = pci_get_drvdata(pdev);
+
+ for (i = 0; i < 2; i++)
+ if (card->ports[i].card)
+ unregister_hdlc_device(card->ports[i].netdev);
+
+ if (card->irq)
+ free_irq(card->irq, card);
+
+ if (card->rambase)
+ iounmap(card->rambase);
+ if (card->scabase)
+ iounmap(card->scabase);
+ if (card->plxbase)
+ iounmap(card->plxbase);
+
+ pci_release_regions(pdev);
+ pci_disable_device(pdev);
+ if (card->ports[0].netdev)
+ free_netdev(card->ports[0].netdev);
+ if (card->ports[1].netdev)
+ free_netdev(card->ports[1].netdev);
+ kfree(card);
+}
+
+static const struct net_device_ops pci200_ops = {
+ .ndo_open = pci200_open,
+ .ndo_stop = pci200_close,
+ .ndo_start_xmit = hdlc_start_xmit,
+ .ndo_siocwandev = pci200_ioctl,
+ .ndo_siocdevprivate = pci200_siocdevprivate,
+};
+
+static int pci200_pci_init_one(struct pci_dev *pdev,
+ const struct pci_device_id *ent)
+{
+ card_t *card;
+ u32 __iomem *p;
+ int i;
+ u32 ramsize;
+ u32 ramphys; /* buffer memory base */
+ u32 scaphys; /* SCA memory base */
+ u32 plxphys; /* PLX registers memory base */
+
+ i = pci_enable_device(pdev);
+ if (i)
+ return i;
+
+ i = pci_request_regions(pdev, "PCI200SYN");
+ if (i) {
+ pci_disable_device(pdev);
+ return i;
+ }
+
+ card = kzalloc(sizeof(card_t), GFP_KERNEL);
+ if (!card) {
+ pci_release_regions(pdev);
+ pci_disable_device(pdev);
+ return -ENOBUFS;
+ }
+ pci_set_drvdata(pdev, card);
+ card->ports[0].netdev = alloc_hdlcdev(&card->ports[0]);
+ card->ports[1].netdev = alloc_hdlcdev(&card->ports[1]);
+ if (!card->ports[0].netdev || !card->ports[1].netdev) {
+ pr_err("unable to allocate memory\n");
+ pci200_pci_remove_one(pdev);
+ return -ENOMEM;
+ }
+
+ if (pci_resource_len(pdev, 0) != PCI200SYN_PLX_SIZE ||
+ pci_resource_len(pdev, 2) != PCI200SYN_SCA_SIZE ||
+ pci_resource_len(pdev, 3) < 16384) {
+ pr_err("invalid card EEPROM parameters\n");
+ pci200_pci_remove_one(pdev);
+ return -EFAULT;
+ }
+
+ plxphys = pci_resource_start(pdev, 0) & PCI_BASE_ADDRESS_MEM_MASK;
+ card->plxbase = ioremap(plxphys, PCI200SYN_PLX_SIZE);
+
+ scaphys = pci_resource_start(pdev, 2) & PCI_BASE_ADDRESS_MEM_MASK;
+ card->scabase = ioremap(scaphys, PCI200SYN_SCA_SIZE);
+
+ ramphys = pci_resource_start(pdev, 3) & PCI_BASE_ADDRESS_MEM_MASK;
+ card->rambase = pci_ioremap_bar(pdev, 3);
+
+ if (!card->plxbase || !card->scabase || !card->rambase) {
+ pr_err("ioremap() failed\n");
+ pci200_pci_remove_one(pdev);
+ return -EFAULT;
+ }
+
+ /* Reset PLX */
+ p = &card->plxbase->init_ctrl;
+ writel(readl(p) | 0x40000000, p);
+ readl(p); /* Flush the write - do not use sca_flush */
+ udelay(1);
+
+ writel(readl(p) & ~0x40000000, p);
+ readl(p); /* Flush the write - do not use sca_flush */
+ udelay(1);
+
+ ramsize = sca_detect_ram(card, card->rambase,
+ pci_resource_len(pdev, 3));
+
+ /* number of TX + RX buffers for one port - this is dual port card */
+ i = ramsize / (2 * (sizeof(pkt_desc) + HDLC_MAX_MRU));
+ card->tx_ring_buffers = min(i / 2, MAX_TX_BUFFERS);
+ card->rx_ring_buffers = i - card->tx_ring_buffers;
+
+ card->buff_offset = 2 * sizeof(pkt_desc) * (card->tx_ring_buffers +
+ card->rx_ring_buffers);
+
+ pr_info("%u KB RAM at 0x%x, IRQ%u, using %u TX + %u RX packets rings\n",
+ ramsize / 1024, ramphys,
+ pdev->irq, card->tx_ring_buffers, card->rx_ring_buffers);
+
+ if (card->tx_ring_buffers < 1) {
+ pr_err("RAM test failed\n");
+ pci200_pci_remove_one(pdev);
+ return -EFAULT;
+ }
+
+ /* Enable interrupts on the PCI bridge */
+ p = &card->plxbase->intr_ctrl_stat;
+ writew(readw(p) | 0x0040, p);
+
+ /* Allocate IRQ */
+ if (request_irq(pdev->irq, sca_intr, IRQF_SHARED, "pci200syn", card)) {
+ pr_warn("could not allocate IRQ%d\n", pdev->irq);
+ pci200_pci_remove_one(pdev);
+ return -EBUSY;
+ }
+ card->irq = pdev->irq;
+
+ sca_init(card, 0);
+
+ for (i = 0; i < 2; i++) {
+ port_t *port = &card->ports[i];
+ struct net_device *dev = port->netdev;
+ hdlc_device *hdlc = dev_to_hdlc(dev);
+
+ port->chan = i;
+
+ spin_lock_init(&port->lock);
+ dev->irq = card->irq;
+ dev->mem_start = ramphys;
+ dev->mem_end = ramphys + ramsize - 1;
+ dev->tx_queue_len = 50;
+ dev->netdev_ops = &pci200_ops;
+ hdlc->attach = sca_attach;
+ hdlc->xmit = sca_xmit;
+ port->settings.clock_type = CLOCK_EXT;
+ port->card = card;
+ sca_init_port(port);
+ if (register_hdlc_device(dev)) {
+ pr_err("unable to register hdlc device\n");
+ port->card = NULL;
+ pci200_pci_remove_one(pdev);
+ return -ENOBUFS;
+ }
+
+ netdev_info(dev, "PCI200SYN channel %d\n", port->chan);
+ }
+
+ sca_flush(card);
+ return 0;
+}
+
+static const struct pci_device_id pci200_pci_tbl[] = {
+ { PCI_VENDOR_ID_PLX, PCI_DEVICE_ID_PLX_9050, PCI_VENDOR_ID_PLX,
+ PCI_DEVICE_ID_PLX_PCI200SYN, 0, 0, 0 },
+ { 0, }
+};
+
+static struct pci_driver pci200_pci_driver = {
+ .name = "PCI200SYN",
+ .id_table = pci200_pci_tbl,
+ .probe = pci200_pci_init_one,
+ .remove = pci200_pci_remove_one,
+};
+
+static int __init pci200_init_module(void)
+{
+ if (pci_clock_freq < 1000000 || pci_clock_freq > 80000000) {
+ pr_err("Invalid PCI clock frequency\n");
+ return -EINVAL;
+ }
+ return pci_register_driver(&pci200_pci_driver);
+}
+
+static void __exit pci200_cleanup_module(void)
+{
+ pci_unregister_driver(&pci200_pci_driver);
+}
+
+MODULE_AUTHOR("Krzysztof Halasa <khc@pm.waw.pl>");
+MODULE_DESCRIPTION("Goramo PCI200SYN serial port driver");
+MODULE_LICENSE("GPL v2");
+MODULE_DEVICE_TABLE(pci, pci200_pci_tbl);
+module_param(pci_clock_freq, int, 0444);
+MODULE_PARM_DESC(pci_clock_freq, "System PCI clock frequency in Hz");
+module_init(pci200_init_module);
+module_exit(pci200_cleanup_module);
diff --git a/drivers/net/wan/slic_ds26522.c b/drivers/net/wan/slic_ds26522.c
new file mode 100644
index 000000000..6063552ce
--- /dev/null
+++ b/drivers/net/wan/slic_ds26522.c
@@ -0,0 +1,244 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * drivers/net/wan/slic_ds26522.c
+ *
+ * Copyright (C) 2016 Freescale Semiconductor, Inc.
+ *
+ * Author:Zhao Qiang<qiang.zhao@nxp.com>
+ */
+
+#include <linux/bitrev.h>
+#include <linux/module.h>
+#include <linux/device.h>
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/kthread.h>
+#include <linux/spi/spi.h>
+#include <linux/wait.h>
+#include <linux/param.h>
+#include <linux/delay.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/io.h>
+#include "slic_ds26522.h"
+
+#define SLIC_TRANS_LEN 1
+#define SLIC_TWO_LEN 2
+#define SLIC_THREE_LEN 3
+
+static struct spi_device *g_spi;
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Zhao Qiang<B45475@freescale.com>");
+
+/* the read/write format of address is
+ * w/r|A13|A12|A11|A10|A9|A8|A7|A6|A5|A4|A3|A2|A1|A0|x
+ */
+static void slic_write(struct spi_device *spi, u16 addr,
+ u8 data)
+{
+ u8 temp[3];
+
+ addr = bitrev16(addr) >> 1;
+ data = bitrev8(data);
+ temp[0] = (u8)((addr >> 8) & 0x7f);
+ temp[1] = (u8)(addr & 0xfe);
+ temp[2] = data;
+
+ /* write spi addr and value */
+ spi_write(spi, &temp[0], SLIC_THREE_LEN);
+}
+
+static u8 slic_read(struct spi_device *spi, u16 addr)
+{
+ u8 temp[2];
+ u8 data;
+
+ addr = bitrev16(addr) >> 1;
+ temp[0] = (u8)(((addr >> 8) & 0x7f) | 0x80);
+ temp[1] = (u8)(addr & 0xfe);
+
+ spi_write_then_read(spi, &temp[0], SLIC_TWO_LEN, &data,
+ SLIC_TRANS_LEN);
+
+ data = bitrev8(data);
+ return data;
+}
+
+static bool get_slic_product_code(struct spi_device *spi)
+{
+ u8 device_id;
+
+ device_id = slic_read(spi, DS26522_IDR_ADDR);
+ if ((device_id & 0xf8) == 0x68)
+ return true;
+ else
+ return false;
+}
+
+static void ds26522_e1_spec_config(struct spi_device *spi)
+{
+ /* Receive E1 Mode, Framer Disabled */
+ slic_write(spi, DS26522_RMMR_ADDR, DS26522_RMMR_E1);
+
+ /* Transmit E1 Mode, Framer Disable */
+ slic_write(spi, DS26522_TMMR_ADDR, DS26522_TMMR_E1);
+
+ /* Receive E1 Mode Framer Enable */
+ slic_write(spi, DS26522_RMMR_ADDR,
+ slic_read(spi, DS26522_RMMR_ADDR) | DS26522_RMMR_FRM_EN);
+
+ /* Transmit E1 Mode Framer Enable */
+ slic_write(spi, DS26522_TMMR_ADDR,
+ slic_read(spi, DS26522_TMMR_ADDR) | DS26522_TMMR_FRM_EN);
+
+ /* RCR1, receive E1 B8zs & ESF */
+ slic_write(spi, DS26522_RCR1_ADDR,
+ DS26522_RCR1_E1_HDB3 | DS26522_RCR1_E1_CCS);
+
+ /* RSYSCLK=2.048MHz, RSYNC-Output */
+ slic_write(spi, DS26522_RIOCR_ADDR,
+ DS26522_RIOCR_2048KHZ | DS26522_RIOCR_RSIO_OUT);
+
+ /* TCR1 Transmit E1 b8zs */
+ slic_write(spi, DS26522_TCR1_ADDR, DS26522_TCR1_TB8ZS);
+
+ /* TSYSCLK=2.048MHz, TSYNC-Output */
+ slic_write(spi, DS26522_TIOCR_ADDR,
+ DS26522_TIOCR_2048KHZ | DS26522_TIOCR_TSIO_OUT);
+
+ /* Set E1TAF */
+ slic_write(spi, DS26522_E1TAF_ADDR, DS26522_E1TAF_DEFAULT);
+
+ /* Set E1TNAF register */
+ slic_write(spi, DS26522_E1TNAF_ADDR, DS26522_E1TNAF_DEFAULT);
+
+ /* Receive E1 Mode Framer Enable & init Done */
+ slic_write(spi, DS26522_RMMR_ADDR, slic_read(spi, DS26522_RMMR_ADDR) |
+ DS26522_RMMR_INIT_DONE);
+
+ /* Transmit E1 Mode Framer Enable & init Done */
+ slic_write(spi, DS26522_TMMR_ADDR, slic_read(spi, DS26522_TMMR_ADDR) |
+ DS26522_TMMR_INIT_DONE);
+
+ /* Configure LIU E1 mode */
+ slic_write(spi, DS26522_LTRCR_ADDR, DS26522_LTRCR_E1);
+
+ /* E1 Mode default 75 ohm w/Transmit Impedance Matlinking */
+ slic_write(spi, DS26522_LTITSR_ADDR,
+ DS26522_LTITSR_TLIS_75OHM | DS26522_LTITSR_LBOS_75OHM);
+
+ /* E1 Mode default 75 ohm Long Haul w/Receive Impedance Matlinking */
+ slic_write(spi, DS26522_LRISMR_ADDR,
+ DS26522_LRISMR_75OHM | DS26522_LRISMR_MAX);
+
+ /* Enable Transmit output */
+ slic_write(spi, DS26522_LMCR_ADDR, DS26522_LMCR_TE);
+}
+
+static int slic_ds26522_init_configure(struct spi_device *spi)
+{
+ u16 addr;
+
+ /* set clock */
+ slic_write(spi, DS26522_GTCCR_ADDR, DS26522_GTCCR_BPREFSEL_REFCLKIN |
+ DS26522_GTCCR_BFREQSEL_2048KHZ |
+ DS26522_GTCCR_FREQSEL_2048KHZ);
+ slic_write(spi, DS26522_GTCR2_ADDR, DS26522_GTCR2_TSSYNCOUT);
+ slic_write(spi, DS26522_GFCR_ADDR, DS26522_GFCR_BPCLK_2048KHZ);
+
+ /* set gtcr */
+ slic_write(spi, DS26522_GTCR1_ADDR, DS26522_GTCR1);
+
+ /* Global LIU Software Reset Register */
+ slic_write(spi, DS26522_GLSRR_ADDR, DS26522_GLSRR_RESET);
+
+ /* Global Framer and BERT Software Reset Register */
+ slic_write(spi, DS26522_GFSRR_ADDR, DS26522_GFSRR_RESET);
+
+ usleep_range(100, 120);
+
+ slic_write(spi, DS26522_GLSRR_ADDR, DS26522_GLSRR_NORMAL);
+ slic_write(spi, DS26522_GFSRR_ADDR, DS26522_GFSRR_NORMAL);
+
+ /* Perform RX/TX SRESET,Reset receiver */
+ slic_write(spi, DS26522_RMMR_ADDR, DS26522_RMMR_SFTRST);
+
+ /* Reset tranceiver */
+ slic_write(spi, DS26522_TMMR_ADDR, DS26522_TMMR_SFTRST);
+
+ usleep_range(100, 120);
+
+ /* Zero all Framer Registers */
+ for (addr = DS26522_RF_ADDR_START; addr <= DS26522_RF_ADDR_END;
+ addr++)
+ slic_write(spi, addr, 0);
+
+ for (addr = DS26522_TF_ADDR_START; addr <= DS26522_TF_ADDR_END;
+ addr++)
+ slic_write(spi, addr, 0);
+
+ for (addr = DS26522_LIU_ADDR_START; addr <= DS26522_LIU_ADDR_END;
+ addr++)
+ slic_write(spi, addr, 0);
+
+ for (addr = DS26522_BERT_ADDR_START; addr <= DS26522_BERT_ADDR_END;
+ addr++)
+ slic_write(spi, addr, 0);
+
+ /* setup ds26522 for E1 specification */
+ ds26522_e1_spec_config(spi);
+
+ slic_write(spi, DS26522_GTCR1_ADDR, 0x00);
+
+ return 0;
+}
+
+static void slic_ds26522_remove(struct spi_device *spi)
+{
+ pr_info("DS26522 module uninstalled\n");
+}
+
+static int slic_ds26522_probe(struct spi_device *spi)
+{
+ int ret = 0;
+
+ g_spi = spi;
+ spi->bits_per_word = 8;
+
+ if (!get_slic_product_code(spi))
+ return ret;
+
+ ret = slic_ds26522_init_configure(spi);
+ if (ret == 0)
+ pr_info("DS26522 cs%d configured\n", spi->chip_select);
+
+ return ret;
+}
+
+static const struct spi_device_id slic_ds26522_id[] = {
+ { .name = "ds26522" },
+ { /* sentinel */ },
+};
+MODULE_DEVICE_TABLE(spi, slic_ds26522_id);
+
+static const struct of_device_id slic_ds26522_match[] = {
+ {
+ .compatible = "maxim,ds26522",
+ },
+ {},
+};
+MODULE_DEVICE_TABLE(of, slic_ds26522_match);
+
+static struct spi_driver slic_ds26522_driver = {
+ .driver = {
+ .name = "ds26522",
+ .bus = &spi_bus_type,
+ .of_match_table = slic_ds26522_match,
+ },
+ .probe = slic_ds26522_probe,
+ .remove = slic_ds26522_remove,
+ .id_table = slic_ds26522_id,
+};
+
+module_spi_driver(slic_ds26522_driver);
diff --git a/drivers/net/wan/slic_ds26522.h b/drivers/net/wan/slic_ds26522.h
new file mode 100644
index 000000000..59f987e4f
--- /dev/null
+++ b/drivers/net/wan/slic_ds26522.h
@@ -0,0 +1,130 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * drivers/tdm/line_ctrl/slic_ds26522.h
+ *
+ * Copyright 2016 Freescale Semiconductor, Inc.
+ *
+ * Author: Zhao Qiang <B45475@freescale.com>
+ */
+
+#define DS26522_RF_ADDR_START 0x00
+#define DS26522_RF_ADDR_END 0xef
+#define DS26522_GLB_ADDR_START 0xf0
+#define DS26522_GLB_ADDR_END 0xff
+#define DS26522_TF_ADDR_START 0x100
+#define DS26522_TF_ADDR_END 0x1ef
+#define DS26522_LIU_ADDR_START 0x1000
+#define DS26522_LIU_ADDR_END 0x101f
+#define DS26522_TEST_ADDR_START 0x1008
+#define DS26522_TEST_ADDR_END 0x101f
+#define DS26522_BERT_ADDR_START 0x1100
+#define DS26522_BERT_ADDR_END 0x110f
+
+#define DS26522_RMMR_ADDR 0x80
+#define DS26522_RCR1_ADDR 0x81
+#define DS26522_RCR3_ADDR 0x83
+#define DS26522_RIOCR_ADDR 0x84
+
+#define DS26522_GTCR1_ADDR 0xf0
+#define DS26522_GFCR_ADDR 0xf1
+#define DS26522_GTCR2_ADDR 0xf2
+#define DS26522_GTCCR_ADDR 0xf3
+#define DS26522_GLSRR_ADDR 0xf5
+#define DS26522_GFSRR_ADDR 0xf6
+#define DS26522_IDR_ADDR 0xf8
+
+#define DS26522_E1TAF_ADDR 0x164
+#define DS26522_E1TNAF_ADDR 0x165
+#define DS26522_TMMR_ADDR 0x180
+#define DS26522_TCR1_ADDR 0x181
+#define DS26522_TIOCR_ADDR 0x184
+
+#define DS26522_LTRCR_ADDR 0x1000
+#define DS26522_LTITSR_ADDR 0x1001
+#define DS26522_LMCR_ADDR 0x1002
+#define DS26522_LRISMR_ADDR 0x1007
+
+#define MAX_NUM_OF_CHANNELS 8
+#define PQ_MDS_8E1T1_BRD_REV 0x00
+#define PQ_MDS_8E1T1_PLD_REV 0x00
+
+#define DS26522_GTCCR_BPREFSEL_REFCLKIN 0xa0
+#define DS26522_GTCCR_BFREQSEL_1544KHZ 0x08
+#define DS26522_GTCCR_FREQSEL_1544KHZ 0x04
+#define DS26522_GTCCR_BFREQSEL_2048KHZ 0x00
+#define DS26522_GTCCR_FREQSEL_2048KHZ 0x00
+
+#define DS26522_GFCR_BPCLK_2048KHZ 0x00
+
+#define DS26522_GTCR2_TSSYNCOUT 0x02
+#define DS26522_GTCR1 0x00
+
+#define DS26522_GFSRR_RESET 0x01
+#define DS26522_GFSRR_NORMAL 0x00
+
+#define DS26522_GLSRR_RESET 0x01
+#define DS26522_GLSRR_NORMAL 0x00
+
+#define DS26522_RMMR_SFTRST 0x02
+#define DS26522_RMMR_FRM_EN 0x80
+#define DS26522_RMMR_INIT_DONE 0x40
+#define DS26522_RMMR_T1 0x00
+#define DS26522_RMMR_E1 0x01
+
+#define DS26522_E1TAF_DEFAULT 0x1b
+#define DS26522_E1TNAF_DEFAULT 0x40
+
+#define DS26522_TMMR_SFTRST 0x02
+#define DS26522_TMMR_FRM_EN 0x80
+#define DS26522_TMMR_INIT_DONE 0x40
+#define DS26522_TMMR_T1 0x00
+#define DS26522_TMMR_E1 0x01
+
+#define DS26522_RCR1_T1_SYNCT 0x80
+#define DS26522_RCR1_T1_RB8ZS 0x40
+#define DS26522_RCR1_T1_SYNCC 0x08
+
+#define DS26522_RCR1_E1_HDB3 0x40
+#define DS26522_RCR1_E1_CCS 0x20
+
+#define DS26522_RIOCR_1544KHZ 0x00
+#define DS26522_RIOCR_2048KHZ 0x10
+#define DS26522_RIOCR_RSIO_OUT 0x00
+
+#define DS26522_RCR3_FLB 0x01
+
+#define DS26522_TIOCR_1544KHZ 0x00
+#define DS26522_TIOCR_2048KHZ 0x10
+#define DS26522_TIOCR_TSIO_OUT 0x04
+
+#define DS26522_TCR1_TB8ZS 0x04
+
+#define DS26522_LTRCR_T1 0x02
+#define DS26522_LTRCR_E1 0x00
+
+#define DS26522_LTITSR_TLIS_75OHM 0x00
+#define DS26522_LTITSR_LBOS_75OHM 0x00
+#define DS26522_LTITSR_TLIS_100OHM 0x10
+#define DS26522_LTITSR_TLIS_0DB_CSU 0x00
+
+#define DS26522_LRISMR_75OHM 0x00
+#define DS26522_LRISMR_100OHM 0x10
+#define DS26522_LRISMR_MAX 0x03
+
+#define DS26522_LMCR_TE 0x01
+
+enum line_rate {
+ LINE_RATE_T1, /* T1 line rate (1.544 Mbps) */
+ LINE_RATE_E1 /* E1 line rate (2.048 Mbps) */
+};
+
+enum tdm_trans_mode {
+ NORMAL = 0,
+ FRAMER_LB
+};
+
+enum card_support_type {
+ LM_CARD = 0,
+ DS26522_CARD,
+ NO_CARD
+};
diff --git a/drivers/net/wan/wanxl.c b/drivers/net/wan/wanxl.c
new file mode 100644
index 000000000..5a9e26218
--- /dev/null
+++ b/drivers/net/wan/wanxl.c
@@ -0,0 +1,844 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * wanXL serial card driver for Linux
+ * host part
+ *
+ * Copyright (C) 2003 Krzysztof Halasa <khc@pm.waw.pl>
+ *
+ * Status:
+ * - Only DTE (external clock) support with NRZ and NRZI encodings
+ * - wanXL100 will require minor driver modifications, no access to hw
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/sched.h>
+#include <linux/types.h>
+#include <linux/fcntl.h>
+#include <linux/string.h>
+#include <linux/errno.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/ioport.h>
+#include <linux/netdevice.h>
+#include <linux/hdlc.h>
+#include <linux/pci.h>
+#include <linux/dma-mapping.h>
+#include <linux/delay.h>
+#include <asm/io.h>
+
+#include "wanxl.h"
+
+static const char *version = "wanXL serial card driver version: 0.48";
+
+#define PLX_CTL_RESET 0x40000000 /* adapter reset */
+
+#undef DEBUG_PKT
+#undef DEBUG_PCI
+
+/* MAILBOX #1 - PUTS COMMANDS */
+#define MBX1_CMD_ABORTJ 0x85000000 /* Abort and Jump */
+#ifdef __LITTLE_ENDIAN
+#define MBX1_CMD_BSWAP 0x8C000001 /* little-endian Byte Swap Mode */
+#else
+#define MBX1_CMD_BSWAP 0x8C000000 /* big-endian Byte Swap Mode */
+#endif
+
+/* MAILBOX #2 - DRAM SIZE */
+#define MBX2_MEMSZ_MASK 0xFFFF0000 /* PUTS Memory Size Register mask */
+
+struct port {
+ struct net_device *dev;
+ struct card *card;
+ spinlock_t lock; /* for wanxl_xmit */
+ int node; /* physical port #0 - 3 */
+ unsigned int clock_type;
+ int tx_in, tx_out;
+ struct sk_buff *tx_skbs[TX_BUFFERS];
+};
+
+struct card_status {
+ desc_t rx_descs[RX_QUEUE_LENGTH];
+ port_status_t port_status[4];
+};
+
+struct card {
+ int n_ports; /* 1, 2 or 4 ports */
+ u8 irq;
+
+ u8 __iomem *plx; /* PLX PCI9060 virtual base address */
+ struct pci_dev *pdev; /* for pci_name(pdev) */
+ int rx_in;
+ struct sk_buff *rx_skbs[RX_QUEUE_LENGTH];
+ struct card_status *status; /* shared between host and card */
+ dma_addr_t status_address;
+ struct port ports[]; /* 1 - 4 port structures follow */
+};
+
+static inline struct port *dev_to_port(struct net_device *dev)
+{
+ return (struct port *)dev_to_hdlc(dev)->priv;
+}
+
+static inline port_status_t *get_status(struct port *port)
+{
+ return &port->card->status->port_status[port->node];
+}
+
+#ifdef DEBUG_PCI
+static inline dma_addr_t pci_map_single_debug(struct pci_dev *pdev, void *ptr,
+ size_t size, int direction)
+{
+ dma_addr_t addr = dma_map_single(&pdev->dev, ptr, size, direction);
+
+ if (addr + size > 0x100000000LL)
+ pr_crit("%s: pci_map_single() returned memory at 0x%llx!\n",
+ pci_name(pdev), (unsigned long long)addr);
+ return addr;
+}
+
+#undef pci_map_single
+#define pci_map_single pci_map_single_debug
+#endif
+
+/* Cable and/or personality module change interrupt service */
+static inline void wanxl_cable_intr(struct port *port)
+{
+ u32 value = get_status(port)->cable;
+ int valid = 1;
+ const char *cable, *pm, *dte = "", *dsr = "", *dcd = "";
+
+ switch (value & 0x7) {
+ case STATUS_CABLE_V35:
+ cable = "V.35";
+ break;
+ case STATUS_CABLE_X21:
+ cable = "X.21";
+ break;
+ case STATUS_CABLE_V24:
+ cable = "V.24";
+ break;
+ case STATUS_CABLE_EIA530:
+ cable = "EIA530";
+ break;
+ case STATUS_CABLE_NONE:
+ cable = "no";
+ break;
+ default:
+ cable = "invalid";
+ }
+
+ switch ((value >> STATUS_CABLE_PM_SHIFT) & 0x7) {
+ case STATUS_CABLE_V35:
+ pm = "V.35";
+ break;
+ case STATUS_CABLE_X21:
+ pm = "X.21";
+ break;
+ case STATUS_CABLE_V24:
+ pm = "V.24";
+ break;
+ case STATUS_CABLE_EIA530:
+ pm = "EIA530";
+ break;
+ case STATUS_CABLE_NONE:
+ pm = "no personality";
+ valid = 0;
+ break;
+ default:
+ pm = "invalid personality";
+ valid = 0;
+ }
+
+ if (valid) {
+ if ((value & 7) == ((value >> STATUS_CABLE_PM_SHIFT) & 7)) {
+ dsr = (value & STATUS_CABLE_DSR) ? ", DSR ON" :
+ ", DSR off";
+ dcd = (value & STATUS_CABLE_DCD) ? ", carrier ON" :
+ ", carrier off";
+ }
+ dte = (value & STATUS_CABLE_DCE) ? " DCE" : " DTE";
+ }
+ netdev_info(port->dev, "%s%s module, %s cable%s%s\n",
+ pm, dte, cable, dsr, dcd);
+
+ if (value & STATUS_CABLE_DCD)
+ netif_carrier_on(port->dev);
+ else
+ netif_carrier_off(port->dev);
+}
+
+/* Transmit complete interrupt service */
+static inline void wanxl_tx_intr(struct port *port)
+{
+ struct net_device *dev = port->dev;
+
+ while (1) {
+ desc_t *desc = &get_status(port)->tx_descs[port->tx_in];
+ struct sk_buff *skb = port->tx_skbs[port->tx_in];
+
+ switch (desc->stat) {
+ case PACKET_FULL:
+ case PACKET_EMPTY:
+ netif_wake_queue(dev);
+ return;
+
+ case PACKET_UNDERRUN:
+ dev->stats.tx_errors++;
+ dev->stats.tx_fifo_errors++;
+ break;
+
+ default:
+ dev->stats.tx_packets++;
+ dev->stats.tx_bytes += skb->len;
+ }
+ desc->stat = PACKET_EMPTY; /* Free descriptor */
+ dma_unmap_single(&port->card->pdev->dev, desc->address,
+ skb->len, DMA_TO_DEVICE);
+ dev_consume_skb_irq(skb);
+ port->tx_in = (port->tx_in + 1) % TX_BUFFERS;
+ }
+}
+
+/* Receive complete interrupt service */
+static inline void wanxl_rx_intr(struct card *card)
+{
+ desc_t *desc;
+
+ while (desc = &card->status->rx_descs[card->rx_in],
+ desc->stat != PACKET_EMPTY) {
+ if ((desc->stat & PACKET_PORT_MASK) > card->n_ports) {
+ pr_crit("%s: received packet for nonexistent port\n",
+ pci_name(card->pdev));
+ } else {
+ struct sk_buff *skb = card->rx_skbs[card->rx_in];
+ struct port *port = &card->ports[desc->stat &
+ PACKET_PORT_MASK];
+ struct net_device *dev = port->dev;
+
+ if (!skb) {
+ dev->stats.rx_dropped++;
+ } else {
+ dma_unmap_single(&card->pdev->dev,
+ desc->address, BUFFER_LENGTH,
+ DMA_FROM_DEVICE);
+ skb_put(skb, desc->length);
+
+#ifdef DEBUG_PKT
+ printk(KERN_DEBUG "%s RX(%i):", dev->name,
+ skb->len);
+ debug_frame(skb);
+#endif
+ dev->stats.rx_packets++;
+ dev->stats.rx_bytes += skb->len;
+ skb->protocol = hdlc_type_trans(skb, dev);
+ netif_rx(skb);
+ skb = NULL;
+ }
+
+ if (!skb) {
+ skb = dev_alloc_skb(BUFFER_LENGTH);
+ desc->address = skb ?
+ dma_map_single(&card->pdev->dev,
+ skb->data,
+ BUFFER_LENGTH,
+ DMA_FROM_DEVICE) : 0;
+ card->rx_skbs[card->rx_in] = skb;
+ }
+ }
+ desc->stat = PACKET_EMPTY; /* Free descriptor */
+ card->rx_in = (card->rx_in + 1) % RX_QUEUE_LENGTH;
+ }
+}
+
+static irqreturn_t wanxl_intr(int irq, void *dev_id)
+{
+ struct card *card = dev_id;
+ int i;
+ u32 stat;
+ int handled = 0;
+
+ while ((stat = readl(card->plx + PLX_DOORBELL_FROM_CARD)) != 0) {
+ handled = 1;
+ writel(stat, card->plx + PLX_DOORBELL_FROM_CARD);
+
+ for (i = 0; i < card->n_ports; i++) {
+ if (stat & (1 << (DOORBELL_FROM_CARD_TX_0 + i)))
+ wanxl_tx_intr(&card->ports[i]);
+ if (stat & (1 << (DOORBELL_FROM_CARD_CABLE_0 + i)))
+ wanxl_cable_intr(&card->ports[i]);
+ }
+ if (stat & (1 << DOORBELL_FROM_CARD_RX))
+ wanxl_rx_intr(card);
+ }
+
+ return IRQ_RETVAL(handled);
+}
+
+static netdev_tx_t wanxl_xmit(struct sk_buff *skb, struct net_device *dev)
+{
+ struct port *port = dev_to_port(dev);
+ desc_t *desc;
+
+ spin_lock(&port->lock);
+
+ desc = &get_status(port)->tx_descs[port->tx_out];
+ if (desc->stat != PACKET_EMPTY) {
+ /* should never happen - previous xmit should stop queue */
+#ifdef DEBUG_PKT
+ printk(KERN_DEBUG "%s: transmitter buffer full\n", dev->name);
+#endif
+ netif_stop_queue(dev);
+ spin_unlock(&port->lock);
+ return NETDEV_TX_BUSY; /* request packet to be queued */
+ }
+
+#ifdef DEBUG_PKT
+ printk(KERN_DEBUG "%s TX(%i):", dev->name, skb->len);
+ debug_frame(skb);
+#endif
+
+ port->tx_skbs[port->tx_out] = skb;
+ desc->address = dma_map_single(&port->card->pdev->dev, skb->data,
+ skb->len, DMA_TO_DEVICE);
+ desc->length = skb->len;
+ desc->stat = PACKET_FULL;
+ writel(1 << (DOORBELL_TO_CARD_TX_0 + port->node),
+ port->card->plx + PLX_DOORBELL_TO_CARD);
+
+ port->tx_out = (port->tx_out + 1) % TX_BUFFERS;
+
+ if (get_status(port)->tx_descs[port->tx_out].stat != PACKET_EMPTY) {
+ netif_stop_queue(dev);
+#ifdef DEBUG_PKT
+ printk(KERN_DEBUG "%s: transmitter buffer full\n", dev->name);
+#endif
+ }
+
+ spin_unlock(&port->lock);
+ return NETDEV_TX_OK;
+}
+
+static int wanxl_attach(struct net_device *dev, unsigned short encoding,
+ unsigned short parity)
+{
+ struct port *port = dev_to_port(dev);
+
+ if (encoding != ENCODING_NRZ &&
+ encoding != ENCODING_NRZI)
+ return -EINVAL;
+
+ if (parity != PARITY_NONE &&
+ parity != PARITY_CRC32_PR1_CCITT &&
+ parity != PARITY_CRC16_PR1_CCITT &&
+ parity != PARITY_CRC32_PR0_CCITT &&
+ parity != PARITY_CRC16_PR0_CCITT)
+ return -EINVAL;
+
+ get_status(port)->encoding = encoding;
+ get_status(port)->parity = parity;
+ return 0;
+}
+
+static int wanxl_ioctl(struct net_device *dev, struct if_settings *ifs)
+{
+ const size_t size = sizeof(sync_serial_settings);
+ sync_serial_settings line;
+ struct port *port = dev_to_port(dev);
+
+ switch (ifs->type) {
+ case IF_GET_IFACE:
+ ifs->type = IF_IFACE_SYNC_SERIAL;
+ if (ifs->size < size) {
+ ifs->size = size; /* data size wanted */
+ return -ENOBUFS;
+ }
+ memset(&line, 0, sizeof(line));
+ line.clock_type = get_status(port)->clocking;
+ line.clock_rate = 0;
+ line.loopback = 0;
+
+ if (copy_to_user(ifs->ifs_ifsu.sync, &line, size))
+ return -EFAULT;
+ return 0;
+
+ case IF_IFACE_SYNC_SERIAL:
+ if (!capable(CAP_NET_ADMIN))
+ return -EPERM;
+ if (dev->flags & IFF_UP)
+ return -EBUSY;
+
+ if (copy_from_user(&line, ifs->ifs_ifsu.sync,
+ size))
+ return -EFAULT;
+
+ if (line.clock_type != CLOCK_EXT &&
+ line.clock_type != CLOCK_TXFROMRX)
+ return -EINVAL; /* No such clock setting */
+
+ if (line.loopback != 0)
+ return -EINVAL;
+
+ get_status(port)->clocking = line.clock_type;
+ return 0;
+
+ default:
+ return hdlc_ioctl(dev, ifs);
+ }
+}
+
+static int wanxl_open(struct net_device *dev)
+{
+ struct port *port = dev_to_port(dev);
+ u8 __iomem *dbr = port->card->plx + PLX_DOORBELL_TO_CARD;
+ unsigned long timeout;
+ int i;
+
+ if (get_status(port)->open) {
+ netdev_err(dev, "port already open\n");
+ return -EIO;
+ }
+
+ i = hdlc_open(dev);
+ if (i)
+ return i;
+
+ port->tx_in = port->tx_out = 0;
+ for (i = 0; i < TX_BUFFERS; i++)
+ get_status(port)->tx_descs[i].stat = PACKET_EMPTY;
+ /* signal the card */
+ writel(1 << (DOORBELL_TO_CARD_OPEN_0 + port->node), dbr);
+
+ timeout = jiffies + HZ;
+ do {
+ if (get_status(port)->open) {
+ netif_start_queue(dev);
+ return 0;
+ }
+ } while (time_after(timeout, jiffies));
+
+ netdev_err(dev, "unable to open port\n");
+ /* ask the card to close the port, should it be still alive */
+ writel(1 << (DOORBELL_TO_CARD_CLOSE_0 + port->node), dbr);
+ return -EFAULT;
+}
+
+static int wanxl_close(struct net_device *dev)
+{
+ struct port *port = dev_to_port(dev);
+ unsigned long timeout;
+ int i;
+
+ hdlc_close(dev);
+ /* signal the card */
+ writel(1 << (DOORBELL_TO_CARD_CLOSE_0 + port->node),
+ port->card->plx + PLX_DOORBELL_TO_CARD);
+
+ timeout = jiffies + HZ;
+ do {
+ if (!get_status(port)->open)
+ break;
+ } while (time_after(timeout, jiffies));
+
+ if (get_status(port)->open)
+ netdev_err(dev, "unable to close port\n");
+
+ netif_stop_queue(dev);
+
+ for (i = 0; i < TX_BUFFERS; i++) {
+ desc_t *desc = &get_status(port)->tx_descs[i];
+
+ if (desc->stat != PACKET_EMPTY) {
+ desc->stat = PACKET_EMPTY;
+ dma_unmap_single(&port->card->pdev->dev,
+ desc->address, port->tx_skbs[i]->len,
+ DMA_TO_DEVICE);
+ dev_kfree_skb(port->tx_skbs[i]);
+ }
+ }
+ return 0;
+}
+
+static struct net_device_stats *wanxl_get_stats(struct net_device *dev)
+{
+ struct port *port = dev_to_port(dev);
+
+ dev->stats.rx_over_errors = get_status(port)->rx_overruns;
+ dev->stats.rx_frame_errors = get_status(port)->rx_frame_errors;
+ dev->stats.rx_errors = dev->stats.rx_over_errors +
+ dev->stats.rx_frame_errors;
+ return &dev->stats;
+}
+
+static int wanxl_puts_command(struct card *card, u32 cmd)
+{
+ unsigned long timeout = jiffies + 5 * HZ;
+
+ writel(cmd, card->plx + PLX_MAILBOX_1);
+ do {
+ if (readl(card->plx + PLX_MAILBOX_1) == 0)
+ return 0;
+
+ schedule();
+ } while (time_after(timeout, jiffies));
+
+ return -1;
+}
+
+static void wanxl_reset(struct card *card)
+{
+ u32 old_value = readl(card->plx + PLX_CONTROL) & ~PLX_CTL_RESET;
+
+ writel(0x80, card->plx + PLX_MAILBOX_0);
+ writel(old_value | PLX_CTL_RESET, card->plx + PLX_CONTROL);
+ readl(card->plx + PLX_CONTROL); /* wait for posted write */
+ udelay(1);
+ writel(old_value, card->plx + PLX_CONTROL);
+ readl(card->plx + PLX_CONTROL); /* wait for posted write */
+}
+
+static void wanxl_pci_remove_one(struct pci_dev *pdev)
+{
+ struct card *card = pci_get_drvdata(pdev);
+ int i;
+
+ for (i = 0; i < card->n_ports; i++) {
+ unregister_hdlc_device(card->ports[i].dev);
+ free_netdev(card->ports[i].dev);
+ }
+
+ /* unregister and free all host resources */
+ if (card->irq)
+ free_irq(card->irq, card);
+
+ wanxl_reset(card);
+
+ for (i = 0; i < RX_QUEUE_LENGTH; i++)
+ if (card->rx_skbs[i]) {
+ dma_unmap_single(&card->pdev->dev,
+ card->status->rx_descs[i].address,
+ BUFFER_LENGTH, DMA_FROM_DEVICE);
+ dev_kfree_skb(card->rx_skbs[i]);
+ }
+
+ if (card->plx)
+ iounmap(card->plx);
+
+ if (card->status)
+ dma_free_coherent(&pdev->dev, sizeof(struct card_status),
+ card->status, card->status_address);
+
+ pci_release_regions(pdev);
+ pci_disable_device(pdev);
+ kfree(card);
+}
+
+#include "wanxlfw.inc"
+
+static const struct net_device_ops wanxl_ops = {
+ .ndo_open = wanxl_open,
+ .ndo_stop = wanxl_close,
+ .ndo_start_xmit = hdlc_start_xmit,
+ .ndo_siocwandev = wanxl_ioctl,
+ .ndo_get_stats = wanxl_get_stats,
+};
+
+static int wanxl_pci_init_one(struct pci_dev *pdev,
+ const struct pci_device_id *ent)
+{
+ struct card *card;
+ u32 ramsize, stat;
+ unsigned long timeout;
+ u32 plx_phy; /* PLX PCI base address */
+ u32 mem_phy; /* memory PCI base addr */
+ u8 __iomem *mem; /* memory virtual base addr */
+ int i, ports;
+
+#ifndef MODULE
+ pr_info_once("%s\n", version);
+#endif
+
+ i = pci_enable_device(pdev);
+ if (i)
+ return i;
+
+ /* QUICC can only access first 256 MB of host RAM directly,
+ * but PLX9060 DMA does 32-bits for actual packet data transfers
+ */
+
+ /* FIXME when PCI/DMA subsystems are fixed.
+ * We set both dma_mask and consistent_dma_mask to 28 bits
+ * and pray pci_alloc_consistent() will use this info. It should
+ * work on most platforms
+ */
+ if (dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(28)) ||
+ dma_set_mask(&pdev->dev, DMA_BIT_MASK(28))) {
+ pr_err("No usable DMA configuration\n");
+ pci_disable_device(pdev);
+ return -EIO;
+ }
+
+ i = pci_request_regions(pdev, "wanXL");
+ if (i) {
+ pci_disable_device(pdev);
+ return i;
+ }
+
+ switch (pdev->device) {
+ case PCI_DEVICE_ID_SBE_WANXL100:
+ ports = 1;
+ break;
+ case PCI_DEVICE_ID_SBE_WANXL200:
+ ports = 2;
+ break;
+ default:
+ ports = 4;
+ }
+
+ card = kzalloc(struct_size(card, ports, ports), GFP_KERNEL);
+ if (!card) {
+ pci_release_regions(pdev);
+ pci_disable_device(pdev);
+ return -ENOBUFS;
+ }
+
+ pci_set_drvdata(pdev, card);
+ card->pdev = pdev;
+
+ card->status = dma_alloc_coherent(&pdev->dev,
+ sizeof(struct card_status),
+ &card->status_address, GFP_KERNEL);
+ if (!card->status) {
+ wanxl_pci_remove_one(pdev);
+ return -ENOBUFS;
+ }
+
+#ifdef DEBUG_PCI
+ printk(KERN_DEBUG "wanXL %s: pci_alloc_consistent() returned memory"
+ " at 0x%LX\n", pci_name(pdev),
+ (unsigned long long)card->status_address);
+#endif
+
+ /* FIXME when PCI/DMA subsystems are fixed.
+ * We set both dma_mask and consistent_dma_mask back to 32 bits
+ * to indicate the card can do 32-bit DMA addressing
+ */
+ if (dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32)) ||
+ dma_set_mask(&pdev->dev, DMA_BIT_MASK(32))) {
+ pr_err("No usable DMA configuration\n");
+ wanxl_pci_remove_one(pdev);
+ return -EIO;
+ }
+
+ /* set up PLX mapping */
+ plx_phy = pci_resource_start(pdev, 0);
+
+ card->plx = ioremap(plx_phy, 0x70);
+ if (!card->plx) {
+ pr_err("ioremap() failed\n");
+ wanxl_pci_remove_one(pdev);
+ return -EFAULT;
+ }
+
+#if RESET_WHILE_LOADING
+ wanxl_reset(card);
+#endif
+
+ timeout = jiffies + 20 * HZ;
+ while ((stat = readl(card->plx + PLX_MAILBOX_0)) != 0) {
+ if (time_before(timeout, jiffies)) {
+ pr_warn("%s: timeout waiting for PUTS to complete\n",
+ pci_name(pdev));
+ wanxl_pci_remove_one(pdev);
+ return -ENODEV;
+ }
+
+ switch (stat & 0xC0) {
+ case 0x00: /* hmm - PUTS completed with non-zero code? */
+ case 0x80: /* PUTS still testing the hardware */
+ break;
+
+ default:
+ pr_warn("%s: PUTS test 0x%X failed\n",
+ pci_name(pdev), stat & 0x30);
+ wanxl_pci_remove_one(pdev);
+ return -ENODEV;
+ }
+
+ schedule();
+ }
+
+ /* get on-board memory size (PUTS detects no more than 4 MB) */
+ ramsize = readl(card->plx + PLX_MAILBOX_2) & MBX2_MEMSZ_MASK;
+
+ /* set up on-board RAM mapping */
+ mem_phy = pci_resource_start(pdev, 2);
+
+ /* sanity check the board's reported memory size */
+ if (ramsize < BUFFERS_ADDR +
+ (TX_BUFFERS + RX_BUFFERS) * BUFFER_LENGTH * ports) {
+ pr_warn("%s: no enough on-board RAM (%u bytes detected, %u bytes required)\n",
+ pci_name(pdev), ramsize,
+ BUFFERS_ADDR +
+ (TX_BUFFERS + RX_BUFFERS) * BUFFER_LENGTH * ports);
+ wanxl_pci_remove_one(pdev);
+ return -ENODEV;
+ }
+
+ if (wanxl_puts_command(card, MBX1_CMD_BSWAP)) {
+ pr_warn("%s: unable to Set Byte Swap Mode\n", pci_name(pdev));
+ wanxl_pci_remove_one(pdev);
+ return -ENODEV;
+ }
+
+ for (i = 0; i < RX_QUEUE_LENGTH; i++) {
+ struct sk_buff *skb = dev_alloc_skb(BUFFER_LENGTH);
+
+ card->rx_skbs[i] = skb;
+ if (skb)
+ card->status->rx_descs[i].address =
+ dma_map_single(&card->pdev->dev, skb->data,
+ BUFFER_LENGTH, DMA_FROM_DEVICE);
+ }
+
+ mem = ioremap(mem_phy, PDM_OFFSET + sizeof(firmware));
+ if (!mem) {
+ pr_err("ioremap() failed\n");
+ wanxl_pci_remove_one(pdev);
+ return -EFAULT;
+ }
+
+ for (i = 0; i < sizeof(firmware); i += 4)
+ writel(ntohl(*(__be32 *)(firmware + i)), mem + PDM_OFFSET + i);
+
+ for (i = 0; i < ports; i++)
+ writel(card->status_address +
+ (void *)&card->status->port_status[i] -
+ (void *)card->status, mem + PDM_OFFSET + 4 + i * 4);
+ writel(card->status_address, mem + PDM_OFFSET + 20);
+ writel(PDM_OFFSET, mem);
+ iounmap(mem);
+
+ writel(0, card->plx + PLX_MAILBOX_5);
+
+ if (wanxl_puts_command(card, MBX1_CMD_ABORTJ)) {
+ pr_warn("%s: unable to Abort and Jump\n", pci_name(pdev));
+ wanxl_pci_remove_one(pdev);
+ return -ENODEV;
+ }
+
+ timeout = jiffies + 5 * HZ;
+ do {
+ stat = readl(card->plx + PLX_MAILBOX_5);
+ if (stat)
+ break;
+ schedule();
+ } while (time_after(timeout, jiffies));
+
+ if (!stat) {
+ pr_warn("%s: timeout while initializing card firmware\n",
+ pci_name(pdev));
+ wanxl_pci_remove_one(pdev);
+ return -ENODEV;
+ }
+
+#if DETECT_RAM
+ ramsize = stat;
+#endif
+
+ pr_info("%s: at 0x%X, %u KB of RAM at 0x%X, irq %u\n",
+ pci_name(pdev), plx_phy, ramsize / 1024, mem_phy, pdev->irq);
+
+ /* Allocate IRQ */
+ if (request_irq(pdev->irq, wanxl_intr, IRQF_SHARED, "wanXL", card)) {
+ pr_warn("%s: could not allocate IRQ%i\n",
+ pci_name(pdev), pdev->irq);
+ wanxl_pci_remove_one(pdev);
+ return -EBUSY;
+ }
+ card->irq = pdev->irq;
+
+ for (i = 0; i < ports; i++) {
+ hdlc_device *hdlc;
+ struct port *port = &card->ports[i];
+ struct net_device *dev = alloc_hdlcdev(port);
+
+ if (!dev) {
+ pr_err("%s: unable to allocate memory\n",
+ pci_name(pdev));
+ wanxl_pci_remove_one(pdev);
+ return -ENOMEM;
+ }
+
+ port->dev = dev;
+ hdlc = dev_to_hdlc(dev);
+ spin_lock_init(&port->lock);
+ dev->tx_queue_len = 50;
+ dev->netdev_ops = &wanxl_ops;
+ hdlc->attach = wanxl_attach;
+ hdlc->xmit = wanxl_xmit;
+ port->card = card;
+ port->node = i;
+ get_status(port)->clocking = CLOCK_EXT;
+ if (register_hdlc_device(dev)) {
+ pr_err("%s: unable to register hdlc device\n",
+ pci_name(pdev));
+ free_netdev(dev);
+ wanxl_pci_remove_one(pdev);
+ return -ENOBUFS;
+ }
+ card->n_ports++;
+ }
+
+ pr_info("%s: port", pci_name(pdev));
+ for (i = 0; i < ports; i++)
+ pr_cont("%s #%i: %s",
+ i ? "," : "", i, card->ports[i].dev->name);
+ pr_cont("\n");
+
+ for (i = 0; i < ports; i++)
+ wanxl_cable_intr(&card->ports[i]); /* get carrier status etc.*/
+
+ return 0;
+}
+
+static const struct pci_device_id wanxl_pci_tbl[] = {
+ { PCI_VENDOR_ID_SBE, PCI_DEVICE_ID_SBE_WANXL100, PCI_ANY_ID,
+ PCI_ANY_ID, 0, 0, 0 },
+ { PCI_VENDOR_ID_SBE, PCI_DEVICE_ID_SBE_WANXL200, PCI_ANY_ID,
+ PCI_ANY_ID, 0, 0, 0 },
+ { PCI_VENDOR_ID_SBE, PCI_DEVICE_ID_SBE_WANXL400, PCI_ANY_ID,
+ PCI_ANY_ID, 0, 0, 0 },
+ { 0, }
+};
+
+static struct pci_driver wanxl_pci_driver = {
+ .name = "wanXL",
+ .id_table = wanxl_pci_tbl,
+ .probe = wanxl_pci_init_one,
+ .remove = wanxl_pci_remove_one,
+};
+
+static int __init wanxl_init_module(void)
+{
+#ifdef MODULE
+ pr_info("%s\n", version);
+#endif
+ return pci_register_driver(&wanxl_pci_driver);
+}
+
+static void __exit wanxl_cleanup_module(void)
+{
+ pci_unregister_driver(&wanxl_pci_driver);
+}
+
+MODULE_AUTHOR("Krzysztof Halasa <khc@pm.waw.pl>");
+MODULE_DESCRIPTION("SBE Inc. wanXL serial port driver");
+MODULE_LICENSE("GPL v2");
+MODULE_DEVICE_TABLE(pci, wanxl_pci_tbl);
+
+module_init(wanxl_init_module);
+module_exit(wanxl_cleanup_module);
diff --git a/drivers/net/wan/wanxl.h b/drivers/net/wan/wanxl.h
new file mode 100644
index 000000000..0b0198bf2
--- /dev/null
+++ b/drivers/net/wan/wanxl.h
@@ -0,0 +1,149 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * wanXL serial card driver for Linux
+ * definitions common to host driver and card firmware
+ *
+ * Copyright (C) 2003 Krzysztof Halasa <khc@pm.waw.pl>
+ */
+
+#define RESET_WHILE_LOADING 0
+
+/* you must rebuild the firmware if any of the following is changed */
+#define DETECT_RAM 0 /* needed for > 4MB RAM, 16 MB maximum */
+#define QUICC_MEMCPY_USES_PLX 1 /* must be used if the host has > 256 MB RAM */
+
+
+#define STATUS_CABLE_V35 2
+#define STATUS_CABLE_X21 3
+#define STATUS_CABLE_V24 4
+#define STATUS_CABLE_EIA530 5
+#define STATUS_CABLE_INVALID 6
+#define STATUS_CABLE_NONE 7
+
+#define STATUS_CABLE_DCE 0x8000
+#define STATUS_CABLE_DSR 0x0010
+#define STATUS_CABLE_DCD 0x0008
+#define STATUS_CABLE_PM_SHIFT 5
+
+#define PDM_OFFSET 0x1000
+
+#define TX_BUFFERS 10 /* per port */
+#define RX_BUFFERS 30
+#define RX_QUEUE_LENGTH 40 /* card->host queue length - per card */
+
+#define PACKET_EMPTY 0x00
+#define PACKET_FULL 0x10
+#define PACKET_SENT 0x20 /* TX only */
+#define PACKET_UNDERRUN 0x30 /* TX only */
+#define PACKET_PORT_MASK 0x03 /* RX only */
+
+/* bit numbers in PLX9060 doorbell registers */
+#define DOORBELL_FROM_CARD_TX_0 0 /* packet sent by the card */
+#define DOORBELL_FROM_CARD_TX_1 1
+#define DOORBELL_FROM_CARD_TX_2 2
+#define DOORBELL_FROM_CARD_TX_3 3
+#define DOORBELL_FROM_CARD_RX 4
+#define DOORBELL_FROM_CARD_CABLE_0 5 /* cable/PM/etc. changed */
+#define DOORBELL_FROM_CARD_CABLE_1 6
+#define DOORBELL_FROM_CARD_CABLE_2 7
+#define DOORBELL_FROM_CARD_CABLE_3 8
+
+#define DOORBELL_TO_CARD_OPEN_0 0
+#define DOORBELL_TO_CARD_OPEN_1 1
+#define DOORBELL_TO_CARD_OPEN_2 2
+#define DOORBELL_TO_CARD_OPEN_3 3
+#define DOORBELL_TO_CARD_CLOSE_0 4
+#define DOORBELL_TO_CARD_CLOSE_1 5
+#define DOORBELL_TO_CARD_CLOSE_2 6
+#define DOORBELL_TO_CARD_CLOSE_3 7
+#define DOORBELL_TO_CARD_TX_0 8 /* outbound packet queued */
+#define DOORBELL_TO_CARD_TX_1 9
+#define DOORBELL_TO_CARD_TX_2 10
+#define DOORBELL_TO_CARD_TX_3 11
+
+/* firmware-only status bits, starting from last DOORBELL_TO_CARD + 1 */
+#define TASK_SCC_0 12
+#define TASK_SCC_1 13
+#define TASK_SCC_2 14
+#define TASK_SCC_3 15
+
+#define ALIGN32(x) (((x) + 3) & 0xFFFFFFFC)
+#define BUFFER_LENGTH ALIGN32(HDLC_MAX_MRU + 4) /* 4 bytes for 32-bit CRC */
+
+/* Address of TX and RX buffers in 68360 address space */
+#define BUFFERS_ADDR 0x4000 /* 16 KB */
+
+#ifndef __ASSEMBLER__
+#define PLX_OFFSET 0
+#else
+#define PLX_OFFSET PLX + 0x80
+#endif
+
+#define PLX_MAILBOX_0 (PLX_OFFSET + 0x40)
+#define PLX_MAILBOX_1 (PLX_OFFSET + 0x44)
+#define PLX_MAILBOX_2 (PLX_OFFSET + 0x48)
+#define PLX_MAILBOX_3 (PLX_OFFSET + 0x4C)
+#define PLX_MAILBOX_4 (PLX_OFFSET + 0x50)
+#define PLX_MAILBOX_5 (PLX_OFFSET + 0x54)
+#define PLX_MAILBOX_6 (PLX_OFFSET + 0x58)
+#define PLX_MAILBOX_7 (PLX_OFFSET + 0x5C)
+#define PLX_DOORBELL_TO_CARD (PLX_OFFSET + 0x60)
+#define PLX_DOORBELL_FROM_CARD (PLX_OFFSET + 0x64)
+#define PLX_INTERRUPT_CS (PLX_OFFSET + 0x68)
+#define PLX_CONTROL (PLX_OFFSET + 0x6C)
+
+#ifdef __ASSEMBLER__
+#define PLX_DMA_0_MODE (PLX + 0x100)
+#define PLX_DMA_0_PCI (PLX + 0x104)
+#define PLX_DMA_0_LOCAL (PLX + 0x108)
+#define PLX_DMA_0_LENGTH (PLX + 0x10C)
+#define PLX_DMA_0_DESC (PLX + 0x110)
+#define PLX_DMA_1_MODE (PLX + 0x114)
+#define PLX_DMA_1_PCI (PLX + 0x118)
+#define PLX_DMA_1_LOCAL (PLX + 0x11C)
+#define PLX_DMA_1_LENGTH (PLX + 0x120)
+#define PLX_DMA_1_DESC (PLX + 0x124)
+#define PLX_DMA_CMD_STS (PLX + 0x128)
+#define PLX_DMA_ARBITR_0 (PLX + 0x12C)
+#define PLX_DMA_ARBITR_1 (PLX + 0x130)
+#endif
+
+#define DESC_LENGTH 12
+
+/* offsets from start of status_t */
+/* card to host */
+#define STATUS_OPEN 0
+#define STATUS_CABLE (STATUS_OPEN + 4)
+#define STATUS_RX_OVERRUNS (STATUS_CABLE + 4)
+#define STATUS_RX_FRAME_ERRORS (STATUS_RX_OVERRUNS + 4)
+
+/* host to card */
+#define STATUS_PARITY (STATUS_RX_FRAME_ERRORS + 4)
+#define STATUS_ENCODING (STATUS_PARITY + 4)
+#define STATUS_CLOCKING (STATUS_ENCODING + 4)
+#define STATUS_TX_DESCS (STATUS_CLOCKING + 4)
+
+#ifndef __ASSEMBLER__
+
+typedef struct {
+ volatile u32 stat;
+ u32 address; /* PCI address */
+ volatile u32 length;
+}desc_t;
+
+
+typedef struct {
+// Card to host
+ volatile u32 open;
+ volatile u32 cable;
+ volatile u32 rx_overruns;
+ volatile u32 rx_frame_errors;
+
+// Host to card
+ u32 parity;
+ u32 encoding;
+ u32 clocking;
+ desc_t tx_descs[TX_BUFFERS];
+}port_status_t;
+
+#endif /* __ASSEMBLER__ */
diff --git a/drivers/net/wan/wanxlfw.S b/drivers/net/wan/wanxlfw.S
new file mode 100644
index 000000000..6c3735ac8
--- /dev/null
+++ b/drivers/net/wan/wanxlfw.S
@@ -0,0 +1,894 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+.psize 0
+/*
+ wanXL serial card driver for Linux
+ card firmware part
+
+ Copyright (C) 2003 Krzysztof Halasa <khc@pm.waw.pl>
+
+
+
+
+
+ DPRAM BDs:
+ 0x000 - 0x050 TX#0 0x050 - 0x140 RX#0
+ 0x140 - 0x190 TX#1 0x190 - 0x280 RX#1
+ 0x280 - 0x2D0 TX#2 0x2D0 - 0x3C0 RX#2
+ 0x3C0 - 0x410 TX#3 0x410 - 0x500 RX#3
+
+
+ 000 5FF 1536 Bytes Dual-Port RAM User Data / BDs
+ 600 6FF 256 Bytes Dual-Port RAM User Data / BDs
+ 700 7FF 256 Bytes Dual-Port RAM User Data / BDs
+ C00 CBF 192 Bytes Dual-Port RAM Parameter RAM Page 1
+ D00 DBF 192 Bytes Dual-Port RAM Parameter RAM Page 2
+ E00 EBF 192 Bytes Dual-Port RAM Parameter RAM Page 3
+ F00 FBF 192 Bytes Dual-Port RAM Parameter RAM Page 4
+
+ local interrupts level
+ NMI 7
+ PIT timer, CPM (RX/TX complete) 4
+ PCI9060 DMA and PCI doorbells 3
+ Cable - not used 1
+*/
+
+#include <linux/hdlc.h>
+#include <linux/hdlc/ioctl.h>
+#include "wanxl.h"
+
+/* memory addresses and offsets */
+
+MAX_RAM_SIZE = 16 * 1024 * 1024 // max RAM supported by hardware
+
+PCI9060_VECTOR = 0x0000006C
+CPM_IRQ_BASE = 0x40
+ERROR_VECTOR = CPM_IRQ_BASE * 4
+SCC1_VECTOR = (CPM_IRQ_BASE + 0x1E) * 4
+SCC2_VECTOR = (CPM_IRQ_BASE + 0x1D) * 4
+SCC3_VECTOR = (CPM_IRQ_BASE + 0x1C) * 4
+SCC4_VECTOR = (CPM_IRQ_BASE + 0x1B) * 4
+CPM_IRQ_LEVEL = 4
+TIMER_IRQ = 128
+TIMER_IRQ_LEVEL = 4
+PITR_CONST = 0x100 + 16 // 1 Hz timer
+
+MBAR = 0x0003FF00
+
+VALUE_WINDOW = 0x40000000
+ORDER_WINDOW = 0xC0000000
+
+PLX = 0xFFF90000
+
+CSRA = 0xFFFB0000
+CSRB = 0xFFFB0002
+CSRC = 0xFFFB0004
+CSRD = 0xFFFB0006
+STATUS_CABLE_LL = 0x2000
+STATUS_CABLE_DTR = 0x1000
+
+DPRBASE = 0xFFFC0000
+
+SCC1_BASE = DPRBASE + 0xC00
+MISC_BASE = DPRBASE + 0xCB0
+SCC2_BASE = DPRBASE + 0xD00
+SCC3_BASE = DPRBASE + 0xE00
+SCC4_BASE = DPRBASE + 0xF00
+
+// offset from SCCx_BASE
+// SCC_xBASE contain offsets from DPRBASE and must be divisible by 8
+SCC_RBASE = 0 // 16-bit RxBD base address
+SCC_TBASE = 2 // 16-bit TxBD base address
+SCC_RFCR = 4 // 8-bit Rx function code
+SCC_TFCR = 5 // 8-bit Tx function code
+SCC_MRBLR = 6 // 16-bit maximum Rx buffer length
+SCC_C_MASK = 0x34 // 32-bit CRC constant
+SCC_C_PRES = 0x38 // 32-bit CRC preset
+SCC_MFLR = 0x46 // 16-bit max Rx frame length (without flags)
+
+REGBASE = DPRBASE + 0x1000
+PICR = REGBASE + 0x026 // 16-bit periodic irq control
+PITR = REGBASE + 0x02A // 16-bit periodic irq timing
+OR1 = REGBASE + 0x064 // 32-bit RAM bank #1 options
+CICR = REGBASE + 0x540 // 32(24)-bit CP interrupt config
+CIMR = REGBASE + 0x548 // 32-bit CP interrupt mask
+CISR = REGBASE + 0x54C // 32-bit CP interrupts in-service
+PADIR = REGBASE + 0x550 // 16-bit PortA data direction bitmap
+PAPAR = REGBASE + 0x552 // 16-bit PortA pin assignment bitmap
+PAODR = REGBASE + 0x554 // 16-bit PortA open drain bitmap
+PADAT = REGBASE + 0x556 // 16-bit PortA data register
+
+PCDIR = REGBASE + 0x560 // 16-bit PortC data direction bitmap
+PCPAR = REGBASE + 0x562 // 16-bit PortC pin assignment bitmap
+PCSO = REGBASE + 0x564 // 16-bit PortC special options
+PCDAT = REGBASE + 0x566 // 16-bit PortC data register
+PCINT = REGBASE + 0x568 // 16-bit PortC interrupt control
+CR = REGBASE + 0x5C0 // 16-bit Command register
+
+SCC1_REGS = REGBASE + 0x600
+SCC2_REGS = REGBASE + 0x620
+SCC3_REGS = REGBASE + 0x640
+SCC4_REGS = REGBASE + 0x660
+SICR = REGBASE + 0x6EC // 32-bit SI clock route
+
+// offset from SCCx_REGS
+SCC_GSMR_L = 0x00 // 32 bits
+SCC_GSMR_H = 0x04 // 32 bits
+SCC_PSMR = 0x08 // 16 bits
+SCC_TODR = 0x0C // 16 bits
+SCC_DSR = 0x0E // 16 bits
+SCC_SCCE = 0x10 // 16 bits
+SCC_SCCM = 0x14 // 16 bits
+SCC_SCCS = 0x17 // 8 bits
+
+#if QUICC_MEMCPY_USES_PLX
+ .macro memcpy_from_pci src, dest, len // len must be < 8 MB
+ addl #3, \len
+ andl #0xFFFFFFFC, \len // always copy n * 4 bytes
+ movel \src, PLX_DMA_0_PCI
+ movel \dest, PLX_DMA_0_LOCAL
+ movel \len, PLX_DMA_0_LENGTH
+ movel #0x0103, PLX_DMA_CMD_STS // start channel 0 transfer
+ bsr memcpy_from_pci_run
+ .endm
+
+ .macro memcpy_to_pci src, dest, len
+ addl #3, \len
+ andl #0xFFFFFFFC, \len // always copy n * 4 bytes
+ movel \src, PLX_DMA_1_LOCAL
+ movel \dest, PLX_DMA_1_PCI
+ movel \len, PLX_DMA_1_LENGTH
+ movel #0x0301, PLX_DMA_CMD_STS // start channel 1 transfer
+ bsr memcpy_to_pci_run
+ .endm
+
+#else
+
+ .macro memcpy src, dest, len // len must be < 65536 bytes
+ movel %d7, -(%sp) // src and dest must be < 256 MB
+ movel \len, %d7 // bits 0 and 1
+ lsrl #2, \len
+ andl \len, \len
+ beq 99f // only 0 - 3 bytes
+ subl #1, \len // for dbf
+98: movel (\src)+, (\dest)+
+ dbfw \len, 98b
+99: movel %d7, \len
+ btstl #1, \len
+ beq 99f
+ movew (\src)+, (\dest)+
+99: btstl #0, \len
+ beq 99f
+ moveb (\src)+, (\dest)+
+99:
+ movel (%sp)+, %d7
+ .endm
+
+ .macro memcpy_from_pci src, dest, len
+ addl #VALUE_WINDOW, \src
+ memcpy \src, \dest, \len
+ .endm
+
+ .macro memcpy_to_pci src, dest, len
+ addl #VALUE_WINDOW, \dest
+ memcpy \src, \dest, \len
+ .endm
+#endif
+
+
+ .macro wait_for_command
+99: btstl #0, CR
+ bne 99b
+ .endm
+
+
+
+
+/****************************** card initialization *******************/
+ .text
+ .global _start
+_start: bra init
+
+ .org _start + 4
+ch_status_addr: .long 0, 0, 0, 0
+rx_descs_addr: .long 0
+
+init:
+#if DETECT_RAM
+ movel OR1, %d0
+ andl #0xF00007FF, %d0 // mask AMxx bits
+ orl #0xFFFF800 & ~(MAX_RAM_SIZE - 1), %d0 // update RAM bank size
+ movel %d0, OR1
+#endif
+
+ addl #VALUE_WINDOW, rx_descs_addr // PCI addresses of shared data
+ clrl %d0 // D0 = 4 * port
+init_1: tstl ch_status_addr(%d0)
+ beq init_2
+ addl #VALUE_WINDOW, ch_status_addr(%d0)
+init_2: addl #4, %d0
+ cmpl #4 * 4, %d0
+ bne init_1
+
+ movel #pci9060_interrupt, PCI9060_VECTOR
+ movel #error_interrupt, ERROR_VECTOR
+ movel #port_interrupt_1, SCC1_VECTOR
+ movel #port_interrupt_2, SCC2_VECTOR
+ movel #port_interrupt_3, SCC3_VECTOR
+ movel #port_interrupt_4, SCC4_VECTOR
+ movel #timer_interrupt, TIMER_IRQ * 4
+
+ movel #0x78000000, CIMR // only SCCx IRQs from CPM
+ movew #(TIMER_IRQ_LEVEL << 8) + TIMER_IRQ, PICR // interrupt from PIT
+ movew #PITR_CONST, PITR
+
+ // SCC1=SCCa SCC2=SCCb SCC3=SCCc SCC4=SCCd prio=4 HP=-1 IRQ=64-79
+ movel #0xD41F40 + (CPM_IRQ_LEVEL << 13), CICR
+ movel #0x543, PLX_DMA_0_MODE // 32-bit, Ready, Burst, IRQ
+ movel #0x543, PLX_DMA_1_MODE
+ movel #0x0, PLX_DMA_0_DESC // from PCI to local
+ movel #0x8, PLX_DMA_1_DESC // from local to PCI
+ movel #0x101, PLX_DMA_CMD_STS // enable both DMA channels
+ // enable local IRQ, DMA, doorbells and PCI IRQ
+ orl #0x000F0300, PLX_INTERRUPT_CS
+
+#if DETECT_RAM
+ bsr ram_test
+#else
+ movel #1, PLX_MAILBOX_5 // non-zero value = init complete
+#endif
+ bsr check_csr
+
+ movew #0xFFFF, PAPAR // all pins are clocks/data
+ clrw PADIR // first function
+ clrw PCSO // CD and CTS always active
+
+
+/****************************** main loop *****************************/
+
+main: movel channel_stats, %d7 // D7 = doorbell + irq status
+ clrl channel_stats
+
+ tstl %d7
+ bne main_1
+ // nothing to do - wait for next event
+ stop #0x2200 // supervisor + IRQ level 2
+ movew #0x2700, %sr // disable IRQs again
+ bra main
+
+main_1: clrl %d0 // D0 = 4 * port
+ clrl %d6 // D6 = doorbell to host value
+
+main_l: btstl #DOORBELL_TO_CARD_CLOSE_0, %d7
+ beq main_op
+ bclrl #DOORBELL_TO_CARD_OPEN_0, %d7 // in case both bits are set
+ bsr close_port
+main_op:
+ btstl #DOORBELL_TO_CARD_OPEN_0, %d7
+ beq main_cl
+ bsr open_port
+main_cl:
+ btstl #DOORBELL_TO_CARD_TX_0, %d7
+ beq main_txend
+ bsr tx
+main_txend:
+ btstl #TASK_SCC_0, %d7
+ beq main_next
+ bsr tx_end
+ bsr rx
+
+main_next:
+ lsrl #1, %d7 // port status for next port
+ addl #4, %d0 // D0 = 4 * next port
+ cmpl #4 * 4, %d0
+ bne main_l
+ movel %d6, PLX_DOORBELL_FROM_CARD // signal the host
+ bra main
+
+
+/****************************** open port *****************************/
+
+open_port: // D0 = 4 * port, D6 = doorbell to host
+ movel ch_status_addr(%d0), %a0 // A0 = port status address
+ tstl STATUS_OPEN(%a0)
+ bne open_port_ret // port already open
+ movel #1, STATUS_OPEN(%a0) // confirm the port is open
+// setup BDs
+ clrl tx_in(%d0)
+ clrl tx_out(%d0)
+ clrl tx_count(%d0)
+ clrl rx_in(%d0)
+
+ movel SICR, %d1 // D1 = clock settings in SICR
+ andl clocking_mask(%d0), %d1
+ cmpl #CLOCK_TXFROMRX, STATUS_CLOCKING(%a0)
+ bne open_port_clock_ext
+ orl clocking_txfromrx(%d0), %d1
+ bra open_port_set_clock
+
+open_port_clock_ext:
+ orl clocking_ext(%d0), %d1
+open_port_set_clock:
+ movel %d1, SICR // update clock settings in SICR
+
+ orw #STATUS_CABLE_DTR, csr_output(%d0) // DTR on
+ bsr check_csr // call with disabled timer interrupt
+
+// Setup TX descriptors
+ movel first_buffer(%d0), %d1 // D1 = starting buffer address
+ movel tx_first_bd(%d0), %a1 // A1 = starting TX BD address
+ movel #TX_BUFFERS - 2, %d2 // D2 = TX_BUFFERS - 1 counter
+ movel #0x18000000, %d3 // D3 = initial TX BD flags: Int + Last
+ cmpl #PARITY_NONE, STATUS_PARITY(%a0)
+ beq open_port_tx_loop
+ bsetl #26, %d3 // TX BD flag: Transmit CRC
+open_port_tx_loop:
+ movel %d3, (%a1)+ // TX flags + length
+ movel %d1, (%a1)+ // buffer address
+ addl #BUFFER_LENGTH, %d1
+ dbfw %d2, open_port_tx_loop
+
+ bsetl #29, %d3 // TX BD flag: Wrap (last BD)
+ movel %d3, (%a1)+ // Final TX flags + length
+ movel %d1, (%a1)+ // buffer address
+
+// Setup RX descriptors // A1 = starting RX BD address
+ movel #RX_BUFFERS - 2, %d2 // D2 = RX_BUFFERS - 1 counter
+open_port_rx_loop:
+ movel #0x90000000, (%a1)+ // RX flags + length
+ movel %d1, (%a1)+ // buffer address
+ addl #BUFFER_LENGTH, %d1
+ dbfw %d2, open_port_rx_loop
+
+ movel #0xB0000000, (%a1)+ // Final RX flags + length
+ movel %d1, (%a1)+ // buffer address
+
+// Setup port parameters
+ movel scc_base_addr(%d0), %a1 // A1 = SCC_BASE address
+ movel scc_reg_addr(%d0), %a2 // A2 = SCC_REGS address
+
+ movel #0xFFFF, SCC_SCCE(%a2) // clear status bits
+ movel #0x0000, SCC_SCCM(%a2) // interrupt mask
+
+ movel tx_first_bd(%d0), %d1
+ movew %d1, SCC_TBASE(%a1) // D1 = offset of first TxBD
+ addl #TX_BUFFERS * 8, %d1
+ movew %d1, SCC_RBASE(%a1) // D1 = offset of first RxBD
+ moveb #0x8, SCC_RFCR(%a1) // Intel mode, 1000
+ moveb #0x8, SCC_TFCR(%a1)
+
+// Parity settings
+ cmpl #PARITY_CRC16_PR1_CCITT, STATUS_PARITY(%a0)
+ bne open_port_parity_1
+ clrw SCC_PSMR(%a2) // CRC16-CCITT
+ movel #0xF0B8, SCC_C_MASK(%a1)
+ movel #0xFFFF, SCC_C_PRES(%a1)
+ movew #HDLC_MAX_MRU + 2, SCC_MFLR(%a1) // 2 bytes for CRC
+ movew #2, parity_bytes(%d0)
+ bra open_port_2
+
+open_port_parity_1:
+ cmpl #PARITY_CRC32_PR1_CCITT, STATUS_PARITY(%a0)
+ bne open_port_parity_2
+ movew #0x0800, SCC_PSMR(%a2) // CRC32-CCITT
+ movel #0xDEBB20E3, SCC_C_MASK(%a1)
+ movel #0xFFFFFFFF, SCC_C_PRES(%a1)
+ movew #HDLC_MAX_MRU + 4, SCC_MFLR(%a1) // 4 bytes for CRC
+ movew #4, parity_bytes(%d0)
+ bra open_port_2
+
+open_port_parity_2:
+ cmpl #PARITY_CRC16_PR0_CCITT, STATUS_PARITY(%a0)
+ bne open_port_parity_3
+ clrw SCC_PSMR(%a2) // CRC16-CCITT preset 0
+ movel #0xF0B8, SCC_C_MASK(%a1)
+ clrl SCC_C_PRES(%a1)
+ movew #HDLC_MAX_MRU + 2, SCC_MFLR(%a1) // 2 bytes for CRC
+ movew #2, parity_bytes(%d0)
+ bra open_port_2
+
+open_port_parity_3:
+ cmpl #PARITY_CRC32_PR0_CCITT, STATUS_PARITY(%a0)
+ bne open_port_parity_4
+ movew #0x0800, SCC_PSMR(%a2) // CRC32-CCITT preset 0
+ movel #0xDEBB20E3, SCC_C_MASK(%a1)
+ clrl SCC_C_PRES(%a1)
+ movew #HDLC_MAX_MRU + 4, SCC_MFLR(%a1) // 4 bytes for CRC
+ movew #4, parity_bytes(%d0)
+ bra open_port_2
+
+open_port_parity_4:
+ clrw SCC_PSMR(%a2) // no parity
+ movel #0xF0B8, SCC_C_MASK(%a1)
+ movel #0xFFFF, SCC_C_PRES(%a1)
+ movew #HDLC_MAX_MRU, SCC_MFLR(%a1) // 0 bytes for CRC
+ clrw parity_bytes(%d0)
+
+open_port_2:
+ movel #0x00000003, SCC_GSMR_H(%a2) // RTSM
+ cmpl #ENCODING_NRZI, STATUS_ENCODING(%a0)
+ bne open_port_nrz
+ movel #0x10040900, SCC_GSMR_L(%a2) // NRZI: TCI Tend RECN+TENC=1
+ bra open_port_3
+
+open_port_nrz:
+ movel #0x10040000, SCC_GSMR_L(%a2) // NRZ: TCI Tend RECN+TENC=0
+open_port_3:
+ movew #BUFFER_LENGTH, SCC_MRBLR(%a1)
+ movel %d0, %d1
+ lsll #4, %d1 // D1 bits 7 and 6 = port
+ orl #1, %d1
+ movew %d1, CR // Init SCC RX and TX params
+ wait_for_command
+
+ // TCI Tend ENR ENT
+ movew #0x001F, SCC_SCCM(%a2) // TXE RXF BSY TXB RXB interrupts
+ orl #0x00000030, SCC_GSMR_L(%a2) // enable SCC
+open_port_ret:
+ rts
+
+
+/****************************** close port ****************************/
+
+close_port: // D0 = 4 * port, D6 = doorbell to host
+ movel scc_reg_addr(%d0), %a0 // A0 = SCC_REGS address
+ clrw SCC_SCCM(%a0) // no SCC interrupts
+ andl #0xFFFFFFCF, SCC_GSMR_L(%a0) // Disable ENT and ENR
+
+ andw #~STATUS_CABLE_DTR, csr_output(%d0) // DTR off
+ bsr check_csr // call with disabled timer interrupt
+
+ movel ch_status_addr(%d0), %d1
+ clrl STATUS_OPEN(%d1) // confirm the port is closed
+ rts
+
+
+/****************************** transmit packet ***********************/
+// queue packets for transmission
+tx: // D0 = 4 * port, D6 = doorbell to host
+ cmpl #TX_BUFFERS, tx_count(%d0)
+ beq tx_ret // all DB's = descs in use
+
+ movel tx_out(%d0), %d1
+ movel %d1, %d2 // D1 = D2 = tx_out BD# = desc#
+ mulul #DESC_LENGTH, %d2 // D2 = TX desc offset
+ addl ch_status_addr(%d0), %d2
+ addl #STATUS_TX_DESCS, %d2 // D2 = TX desc address
+ cmpl #PACKET_FULL, (%d2) // desc status
+ bne tx_ret
+
+// queue it
+ movel 4(%d2), %a0 // PCI address
+ lsll #3, %d1 // BD is 8-bytes long
+ addl tx_first_bd(%d0), %d1 // D1 = current tx_out BD addr
+
+ movel 4(%d1), %a1 // A1 = dest address
+ movel 8(%d2), %d2 // D2 = length
+ movew %d2, 2(%d1) // length into BD
+ memcpy_from_pci %a0, %a1, %d2
+ bsetl #31, (%d1) // CP go ahead
+
+// update tx_out and tx_count
+ movel tx_out(%d0), %d1
+ addl #1, %d1
+ cmpl #TX_BUFFERS, %d1
+ bne tx_1
+ clrl %d1
+tx_1: movel %d1, tx_out(%d0)
+
+ addl #1, tx_count(%d0)
+ bra tx
+
+tx_ret: rts
+
+
+/****************************** packet received ***********************/
+
+// Service receive buffers // D0 = 4 * port, D6 = doorbell to host
+rx: movel rx_in(%d0), %d1 // D1 = rx_in BD#
+ lsll #3, %d1 // BD is 8-bytes long
+ addl rx_first_bd(%d0), %d1 // D1 = current rx_in BD address
+ movew (%d1), %d2 // D2 = RX BD flags
+ btstl #15, %d2
+ bne rx_ret // BD still empty
+
+ btstl #1, %d2
+ bne rx_overrun
+
+ tstw parity_bytes(%d0)
+ bne rx_parity
+ bclrl #2, %d2 // do not test for CRC errors
+rx_parity:
+ andw #0x0CBC, %d2 // mask status bits
+ cmpw #0x0C00, %d2 // correct frame
+ bne rx_bad_frame
+ clrl %d3
+ movew 2(%d1), %d3
+ subw parity_bytes(%d0), %d3 // D3 = packet length
+ cmpw #HDLC_MAX_MRU, %d3
+ bgt rx_bad_frame
+
+rx_good_frame:
+ movel rx_out, %d2
+ mulul #DESC_LENGTH, %d2
+ addl rx_descs_addr, %d2 // D2 = RX desc address
+ cmpl #PACKET_EMPTY, (%d2) // desc stat
+ bne rx_overrun
+
+ movel %d3, 8(%d2)
+ movel 4(%d1), %a0 // A0 = source address
+ movel 4(%d2), %a1
+ tstl %a1
+ beq rx_ignore_data
+ memcpy_to_pci %a0, %a1, %d3
+rx_ignore_data:
+ movel packet_full(%d0), (%d2) // update desc stat
+
+// update D6 and rx_out
+ bsetl #DOORBELL_FROM_CARD_RX, %d6 // signal host that RX completed
+ movel rx_out, %d2
+ addl #1, %d2
+ cmpl #RX_QUEUE_LENGTH, %d2
+ bne rx_1
+ clrl %d2
+rx_1: movel %d2, rx_out
+
+rx_free_bd:
+ andw #0xF000, (%d1) // clear CM and error bits
+ bsetl #31, (%d1) // free BD
+// update rx_in
+ movel rx_in(%d0), %d1
+ addl #1, %d1
+ cmpl #RX_BUFFERS, %d1
+ bne rx_2
+ clrl %d1
+rx_2: movel %d1, rx_in(%d0)
+ bra rx
+
+rx_overrun:
+ movel ch_status_addr(%d0), %d2
+ addl #1, STATUS_RX_OVERRUNS(%d2)
+ bra rx_free_bd
+
+rx_bad_frame:
+ movel ch_status_addr(%d0), %d2
+ addl #1, STATUS_RX_FRAME_ERRORS(%d2)
+ bra rx_free_bd
+
+rx_ret: rts
+
+
+/****************************** packet transmitted ********************/
+
+// Service transmit buffers // D0 = 4 * port, D6 = doorbell to host
+tx_end: tstl tx_count(%d0)
+ beq tx_end_ret // TX buffers already empty
+
+ movel tx_in(%d0), %d1
+ movel %d1, %d2 // D1 = D2 = tx_in BD# = desc#
+ lsll #3, %d1 // BD is 8-bytes long
+ addl tx_first_bd(%d0), %d1 // D1 = current tx_in BD address
+ movew (%d1), %d3 // D3 = TX BD flags
+ btstl #15, %d3
+ bne tx_end_ret // BD still being transmitted
+
+// update D6, tx_in and tx_count
+ orl bell_tx(%d0), %d6 // signal host that TX desc freed
+ subl #1, tx_count(%d0)
+ movel tx_in(%d0), %d1
+ addl #1, %d1
+ cmpl #TX_BUFFERS, %d1
+ bne tx_end_1
+ clrl %d1
+tx_end_1:
+ movel %d1, tx_in(%d0)
+
+// free host's descriptor
+ mulul #DESC_LENGTH, %d2 // D2 = TX desc offset
+ addl ch_status_addr(%d0), %d2
+ addl #STATUS_TX_DESCS, %d2 // D2 = TX desc address
+ btstl #1, %d3
+ bne tx_end_underrun
+ movel #PACKET_SENT, (%d2)
+ bra tx_end
+
+tx_end_underrun:
+ movel #PACKET_UNDERRUN, (%d2)
+ bra tx_end
+
+tx_end_ret: rts
+
+
+/****************************** PLX PCI9060 DMA memcpy ****************/
+
+#if QUICC_MEMCPY_USES_PLX
+// called with interrupts disabled
+memcpy_from_pci_run:
+ movel %d0, -(%sp)
+ movew %sr, -(%sp)
+memcpy_1:
+ movel PLX_DMA_CMD_STS, %d0 // do not btst PLX register directly
+ btstl #4, %d0 // transfer done?
+ bne memcpy_end
+ stop #0x2200 // enable PCI9060 interrupts
+ movew #0x2700, %sr // disable interrupts again
+ bra memcpy_1
+
+memcpy_to_pci_run:
+ movel %d0, -(%sp)
+ movew %sr, -(%sp)
+memcpy_2:
+ movel PLX_DMA_CMD_STS, %d0 // do not btst PLX register directly
+ btstl #12, %d0 // transfer done?
+ bne memcpy_end
+ stop #0x2200 // enable PCI9060 interrupts
+ movew #0x2700, %sr // disable interrupts again
+ bra memcpy_2
+
+memcpy_end:
+ movew (%sp)+, %sr
+ movel (%sp)+, %d0
+ rts
+#endif
+
+
+
+
+
+
+/****************************** PLX PCI9060 interrupt *****************/
+
+pci9060_interrupt:
+ movel %d0, -(%sp)
+
+ movel PLX_DOORBELL_TO_CARD, %d0
+ movel %d0, PLX_DOORBELL_TO_CARD // confirm all requests
+ orl %d0, channel_stats
+
+ movel #0x0909, PLX_DMA_CMD_STS // clear DMA ch #0 and #1 interrupts
+
+ movel (%sp)+, %d0
+ rte
+
+/****************************** SCC interrupts ************************/
+
+port_interrupt_1:
+ orl #0, SCC1_REGS + SCC_SCCE; // confirm SCC events
+ orl #1 << TASK_SCC_0, channel_stats
+ movel #0x40000000, CISR
+ rte
+
+port_interrupt_2:
+ orl #0, SCC2_REGS + SCC_SCCE; // confirm SCC events
+ orl #1 << TASK_SCC_1, channel_stats
+ movel #0x20000000, CISR
+ rte
+
+port_interrupt_3:
+ orl #0, SCC3_REGS + SCC_SCCE; // confirm SCC events
+ orl #1 << TASK_SCC_2, channel_stats
+ movel #0x10000000, CISR
+ rte
+
+port_interrupt_4:
+ orl #0, SCC4_REGS + SCC_SCCE; // confirm SCC events
+ orl #1 << TASK_SCC_3, channel_stats
+ movel #0x08000000, CISR
+ rte
+
+error_interrupt:
+ rte
+
+
+/****************************** cable and PM routine ******************/
+// modified registers: none
+check_csr:
+ movel %d0, -(%sp)
+ movel %d1, -(%sp)
+ movel %d2, -(%sp)
+ movel %a0, -(%sp)
+ movel %a1, -(%sp)
+
+ clrl %d0 // D0 = 4 * port
+ movel #CSRA, %a0 // A0 = CSR address
+
+check_csr_loop:
+ movew (%a0), %d1 // D1 = CSR input bits
+ andl #0xE7, %d1 // PM and cable sense bits (no DCE bit)
+ cmpw #STATUS_CABLE_V35 * (1 + 1 << STATUS_CABLE_PM_SHIFT), %d1
+ bne check_csr_1
+ movew #0x0E08, %d1
+ bra check_csr_valid
+
+check_csr_1:
+ cmpw #STATUS_CABLE_X21 * (1 + 1 << STATUS_CABLE_PM_SHIFT), %d1
+ bne check_csr_2
+ movew #0x0408, %d1
+ bra check_csr_valid
+
+check_csr_2:
+ cmpw #STATUS_CABLE_V24 * (1 + 1 << STATUS_CABLE_PM_SHIFT), %d1
+ bne check_csr_3
+ movew #0x0208, %d1
+ bra check_csr_valid
+
+check_csr_3:
+ cmpw #STATUS_CABLE_EIA530 * (1 + 1 << STATUS_CABLE_PM_SHIFT), %d1
+ bne check_csr_disable
+ movew #0x0D08, %d1
+ bra check_csr_valid
+
+check_csr_disable:
+ movew #0x0008, %d1 // D1 = disable everything
+ movew #0x80E7, %d2 // D2 = input mask: ignore DSR
+ bra check_csr_write
+
+check_csr_valid: // D1 = mode and IRQ bits
+ movew csr_output(%d0), %d2
+ andw #0x3000, %d2 // D2 = requested LL and DTR bits
+ orw %d2, %d1 // D1 = all requested output bits
+ movew #0x80FF, %d2 // D2 = input mask: include DSR
+
+check_csr_write:
+ cmpw old_csr_output(%d0), %d1
+ beq check_csr_input
+ movew %d1, old_csr_output(%d0)
+ movew %d1, (%a0) // Write CSR output bits
+
+check_csr_input:
+ movew (PCDAT), %d1
+ andw dcd_mask(%d0), %d1
+ beq check_csr_dcd_on // DCD and CTS signals are negated
+ movew (%a0), %d1 // D1 = CSR input bits
+ andw #~STATUS_CABLE_DCD, %d1 // DCD off
+ bra check_csr_previous
+
+check_csr_dcd_on:
+ movew (%a0), %d1 // D1 = CSR input bits
+ orw #STATUS_CABLE_DCD, %d1 // DCD on
+check_csr_previous:
+ andw %d2, %d1 // input mask
+ movel ch_status_addr(%d0), %a1
+ cmpl STATUS_CABLE(%a1), %d1 // check for change
+ beq check_csr_next
+ movel %d1, STATUS_CABLE(%a1) // update status
+ movel bell_cable(%d0), PLX_DOORBELL_FROM_CARD // signal the host
+
+check_csr_next:
+ addl #2, %a0 // next CSR register
+ addl #4, %d0 // D0 = 4 * next port
+ cmpl #4 * 4, %d0
+ bne check_csr_loop
+
+ movel (%sp)+, %a1
+ movel (%sp)+, %a0
+ movel (%sp)+, %d2
+ movel (%sp)+, %d1
+ movel (%sp)+, %d0
+ rts
+
+
+/****************************** timer interrupt ***********************/
+
+timer_interrupt:
+ bsr check_csr
+ rte
+
+
+/****************************** RAM sizing and test *******************/
+#if DETECT_RAM
+ram_test:
+ movel #0x12345678, %d1 // D1 = test value
+ movel %d1, (128 * 1024 - 4)
+ movel #128 * 1024, %d0 // D0 = RAM size tested
+ram_test_size:
+ cmpl #MAX_RAM_SIZE, %d0
+ beq ram_test_size_found
+ movel %d0, %a0
+ addl #128 * 1024 - 4, %a0
+ cmpl (%a0), %d1
+ beq ram_test_size_check
+ram_test_next_size:
+ lsll #1, %d0
+ bra ram_test_size
+
+ram_test_size_check:
+ eorl #0xFFFFFFFF, %d1
+ movel %d1, (128 * 1024 - 4)
+ cmpl (%a0), %d1
+ bne ram_test_next_size
+
+ram_test_size_found: // D0 = RAM size
+ movel %d0, %a0 // A0 = fill ptr
+ subl #firmware_end + 4, %d0
+ lsrl #2, %d0
+ movel %d0, %d1 // D1 = DBf counter
+ram_test_fill:
+ movel %a0, -(%a0)
+ dbfw %d1, ram_test_fill
+ subl #0x10000, %d1
+ cmpl #0xFFFFFFFF, %d1
+ bne ram_test_fill
+
+ram_test_loop: // D0 = DBf counter
+ cmpl (%a0)+, %a0
+ dbnew %d0, ram_test_loop
+ bne ram_test_found_bad
+ subl #0x10000, %d0
+ cmpl #0xFFFFFFFF, %d0
+ bne ram_test_loop
+ bra ram_test_all_ok
+
+ram_test_found_bad:
+ subl #4, %a0
+ram_test_all_ok:
+ movel %a0, PLX_MAILBOX_5
+ rts
+#endif
+
+
+/****************************** constants *****************************/
+
+scc_reg_addr:
+ .long SCC1_REGS, SCC2_REGS, SCC3_REGS, SCC4_REGS
+scc_base_addr:
+ .long SCC1_BASE, SCC2_BASE, SCC3_BASE, SCC4_BASE
+
+tx_first_bd:
+ .long DPRBASE
+ .long DPRBASE + (TX_BUFFERS + RX_BUFFERS) * 8
+ .long DPRBASE + (TX_BUFFERS + RX_BUFFERS) * 8 * 2
+ .long DPRBASE + (TX_BUFFERS + RX_BUFFERS) * 8 * 3
+
+rx_first_bd:
+ .long DPRBASE + TX_BUFFERS * 8
+ .long DPRBASE + TX_BUFFERS * 8 + (TX_BUFFERS + RX_BUFFERS) * 8
+ .long DPRBASE + TX_BUFFERS * 8 + (TX_BUFFERS + RX_BUFFERS) * 8 * 2
+ .long DPRBASE + TX_BUFFERS * 8 + (TX_BUFFERS + RX_BUFFERS) * 8 * 3
+
+first_buffer:
+ .long BUFFERS_ADDR
+ .long BUFFERS_ADDR + (TX_BUFFERS + RX_BUFFERS) * BUFFER_LENGTH
+ .long BUFFERS_ADDR + (TX_BUFFERS + RX_BUFFERS) * BUFFER_LENGTH * 2
+ .long BUFFERS_ADDR + (TX_BUFFERS + RX_BUFFERS) * BUFFER_LENGTH * 3
+
+bell_tx:
+ .long 1 << DOORBELL_FROM_CARD_TX_0, 1 << DOORBELL_FROM_CARD_TX_1
+ .long 1 << DOORBELL_FROM_CARD_TX_2, 1 << DOORBELL_FROM_CARD_TX_3
+
+bell_cable:
+ .long 1 << DOORBELL_FROM_CARD_CABLE_0, 1 << DOORBELL_FROM_CARD_CABLE_1
+ .long 1 << DOORBELL_FROM_CARD_CABLE_2, 1 << DOORBELL_FROM_CARD_CABLE_3
+
+packet_full:
+ .long PACKET_FULL, PACKET_FULL + 1, PACKET_FULL + 2, PACKET_FULL + 3
+
+clocking_ext:
+ .long 0x0000002C, 0x00003E00, 0x002C0000, 0x3E000000
+clocking_txfromrx:
+ .long 0x0000002D, 0x00003F00, 0x002D0000, 0x3F000000
+clocking_mask:
+ .long 0x000000FF, 0x0000FF00, 0x00FF0000, 0xFF000000
+dcd_mask:
+ .word 0x020, 0, 0x080, 0, 0x200, 0, 0x800
+
+ .ascii "wanXL firmware\n"
+ .asciz "Copyright (C) 2003 Krzysztof Halasa <khc@pm.waw.pl>\n"
+
+
+/****************************** variables *****************************/
+
+ .align 4
+channel_stats: .long 0
+
+tx_in: .long 0, 0, 0, 0 // transmitted
+tx_out: .long 0, 0, 0, 0 // received from host for transmission
+tx_count: .long 0, 0, 0, 0 // currently in transmit queue
+
+rx_in: .long 0, 0, 0, 0 // received from port
+rx_out: .long 0 // transmitted to host
+parity_bytes: .word 0, 0, 0, 0, 0, 0, 0 // only 4 words are used
+
+csr_output: .word 0
+old_csr_output: .word 0, 0, 0, 0, 0, 0, 0
+ .align 4
+firmware_end: // must be dword-aligned
diff --git a/drivers/net/wan/wanxlfw.inc_shipped b/drivers/net/wan/wanxlfw.inc_shipped
new file mode 100644
index 000000000..73da688f9
--- /dev/null
+++ b/drivers/net/wan/wanxlfw.inc_shipped
@@ -0,0 +1,158 @@
+static u8 firmware[]={
+0x60,0x00,0x00,0x16,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x06,0xB9,0x40,0x00,0x00,0x00,0x00,0x00,
+0x10,0x14,0x42,0x80,0x4A,0xB0,0x09,0xB0,0x00,0x00,0x10,0x04,0x67,0x00,0x00,0x0E,
+0x06,0xB0,0x40,0x00,0x00,0x00,0x09,0xB0,0x00,0x00,0x10,0x04,0x58,0x80,0x0C,0x80,
+0x00,0x00,0x00,0x10,0x66,0x00,0xFF,0xDE,0x21,0xFC,0x00,0x00,0x16,0xBC,0x00,0x6C,
+0x21,0xFC,0x00,0x00,0x17,0x5E,0x01,0x00,0x21,0xFC,0x00,0x00,0x16,0xDE,0x01,0x78,
+0x21,0xFC,0x00,0x00,0x16,0xFE,0x01,0x74,0x21,0xFC,0x00,0x00,0x17,0x1E,0x01,0x70,
+0x21,0xFC,0x00,0x00,0x17,0x3E,0x01,0x6C,0x21,0xFC,0x00,0x00,0x18,0x4C,0x02,0x00,
+0x23,0xFC,0x78,0x00,0x00,0x00,0xFF,0xFC,0x15,0x48,0x33,0xFC,0x04,0x80,0xFF,0xFC,
+0x10,0x26,0x33,0xFC,0x01,0x10,0xFF,0xFC,0x10,0x2A,0x23,0xFC,0x00,0xD4,0x9F,0x40,
+0xFF,0xFC,0x15,0x40,0x23,0xFC,0x00,0x00,0x05,0x43,0xFF,0xF9,0x01,0x00,0x23,0xFC,
+0x00,0x00,0x05,0x43,0xFF,0xF9,0x01,0x14,0x23,0xFC,0x00,0x00,0x00,0x00,0xFF,0xF9,
+0x01,0x10,0x23,0xFC,0x00,0x00,0x00,0x08,0xFF,0xF9,0x01,0x24,0x23,0xFC,0x00,0x00,
+0x01,0x01,0xFF,0xF9,0x01,0x28,0x00,0xB9,0x00,0x0F,0x03,0x00,0xFF,0xF9,0x00,0xE8,
+0x23,0xFC,0x00,0x00,0x00,0x01,0xFF,0xF9,0x00,0xD4,0x61,0x00,0x06,0x74,0x33,0xFC,
+0xFF,0xFF,0xFF,0xFC,0x15,0x52,0x42,0x79,0xFF,0xFC,0x15,0x50,0x42,0x79,0xFF,0xFC,
+0x15,0x64,0x2E,0x3A,0x08,0x50,0x42,0xB9,0x00,0x00,0x19,0x54,0x4A,0x87,0x66,0x00,
+0x00,0x0E,0x4E,0x72,0x22,0x00,0x46,0xFC,0x27,0x00,0x60,0x00,0xFF,0xE6,0x42,0x80,
+0x42,0x86,0x08,0x07,0x00,0x04,0x67,0x00,0x00,0x0A,0x08,0x87,0x00,0x00,0x61,0x00,
+0x02,0xA0,0x08,0x07,0x00,0x00,0x67,0x00,0x00,0x06,0x61,0x00,0x00,0x36,0x08,0x07,
+0x00,0x08,0x67,0x00,0x00,0x06,0x61,0x00,0x02,0xB8,0x08,0x07,0x00,0x0C,0x67,0x00,
+0x00,0x0A,0x61,0x00,0x04,0x94,0x61,0x00,0x03,0x60,0xE2,0x8F,0x58,0x80,0x0C,0x80,
+0x00,0x00,0x00,0x10,0x66,0x00,0xFF,0xBC,0x23,0xC6,0xFF,0xF9,0x00,0xE4,0x60,0x00,
+0xFF,0x92,0x20,0x70,0x09,0xB0,0x00,0x00,0x10,0x04,0x4A,0xA8,0x00,0x00,0x66,0x00,
+0x02,0x4E,0x21,0x7C,0x00,0x00,0x00,0x01,0x00,0x00,0x42,0xB0,0x09,0xB0,0x00,0x00,
+0x19,0x58,0x42,0xB0,0x09,0xB0,0x00,0x00,0x19,0x68,0x42,0xB0,0x09,0xB0,0x00,0x00,
+0x19,0x78,0x42,0xB0,0x09,0xB0,0x00,0x00,0x19,0x88,0x22,0x39,0xFF,0xFC,0x16,0xEC,
+0xC2,0xB0,0x09,0xB0,0x00,0x00,0x18,0xF2,0x0C,0xA8,0x00,0x00,0x00,0x04,0x00,0x18,
+0x66,0x00,0x00,0x0E,0x82,0xB0,0x09,0xB0,0x00,0x00,0x18,0xE2,0x60,0x00,0x00,0x0A,
+0x82,0xB0,0x09,0xB0,0x00,0x00,0x18,0xD2,0x23,0xC1,0xFF,0xFC,0x16,0xEC,0x00,0x70,
+0x10,0x00,0x09,0xB0,0x00,0x00,0x19,0xAA,0x61,0x00,0x05,0x76,0x22,0x30,0x09,0xB0,
+0x00,0x00,0x18,0x92,0x22,0x70,0x09,0xB0,0x00,0x00,0x18,0x72,0x74,0x08,0x26,0x3C,
+0x18,0x00,0x00,0x00,0x0C,0xA8,0x00,0x00,0x00,0x01,0x00,0x10,0x67,0x00,0x00,0x06,
+0x08,0xC3,0x00,0x1A,0x22,0xC3,0x22,0xC1,0x06,0x81,0x00,0x00,0x05,0xFC,0x51,0xCA,
+0xFF,0xF4,0x08,0xC3,0x00,0x1D,0x22,0xC3,0x22,0xC1,0x74,0x1C,0x22,0xFC,0x90,0x00,
+0x00,0x00,0x22,0xC1,0x06,0x81,0x00,0x00,0x05,0xFC,0x51,0xCA,0xFF,0xF0,0x22,0xFC,
+0xB0,0x00,0x00,0x00,0x22,0xC1,0x22,0x70,0x09,0xB0,0x00,0x00,0x18,0x62,0x24,0x70,
+0x09,0xB0,0x00,0x00,0x18,0x52,0x25,0x7C,0x00,0x00,0xFF,0xFF,0x00,0x10,0x25,0x7C,
+0x00,0x00,0x00,0x00,0x00,0x14,0x22,0x30,0x09,0xB0,0x00,0x00,0x18,0x72,0x33,0x41,
+0x00,0x02,0x06,0x81,0x00,0x00,0x00,0x50,0x33,0x41,0x00,0x00,0x13,0x7C,0x00,0x08,
+0x00,0x04,0x13,0x7C,0x00,0x08,0x00,0x05,0x0C,0xA8,0x00,0x00,0x00,0x05,0x00,0x10,
+0x66,0x00,0x00,0x2A,0x42,0x6A,0x00,0x08,0x23,0x7C,0x00,0x00,0xF0,0xB8,0x00,0x34,
+0x23,0x7C,0x00,0x00,0xFF,0xFF,0x00,0x38,0x33,0x7C,0x05,0xFA,0x00,0x46,0x31,0xBC,
+0x00,0x02,0x09,0xB0,0x00,0x00,0x19,0x9C,0x60,0x00,0x00,0xBC,0x0C,0xA8,0x00,0x00,
+0x00,0x07,0x00,0x10,0x66,0x00,0x00,0x2C,0x35,0x7C,0x08,0x00,0x00,0x08,0x23,0x7C,
+0xDE,0xBB,0x20,0xE3,0x00,0x34,0x23,0x7C,0xFF,0xFF,0xFF,0xFF,0x00,0x38,0x33,0x7C,
+0x05,0xFC,0x00,0x46,0x31,0xBC,0x00,0x04,0x09,0xB0,0x00,0x00,0x19,0x9C,0x60,0x00,
+0x00,0x86,0x0C,0xA8,0x00,0x00,0x00,0x04,0x00,0x10,0x66,0x00,0x00,0x26,0x42,0x6A,
+0x00,0x08,0x23,0x7C,0x00,0x00,0xF0,0xB8,0x00,0x34,0x42,0xA9,0x00,0x38,0x33,0x7C,
+0x05,0xFA,0x00,0x46,0x31,0xBC,0x00,0x02,0x09,0xB0,0x00,0x00,0x19,0x9C,0x60,0x00,
+0x00,0x56,0x0C,0xA8,0x00,0x00,0x00,0x06,0x00,0x10,0x66,0x00,0x00,0x28,0x35,0x7C,
+0x08,0x00,0x00,0x08,0x23,0x7C,0xDE,0xBB,0x20,0xE3,0x00,0x34,0x42,0xA9,0x00,0x38,
+0x33,0x7C,0x05,0xFC,0x00,0x46,0x31,0xBC,0x00,0x04,0x09,0xB0,0x00,0x00,0x19,0x9C,
+0x60,0x00,0x00,0x24,0x42,0x6A,0x00,0x08,0x23,0x7C,0x00,0x00,0xF0,0xB8,0x00,0x34,
+0x23,0x7C,0x00,0x00,0xFF,0xFF,0x00,0x38,0x33,0x7C,0x05,0xF8,0x00,0x46,0x42,0x70,
+0x09,0xB0,0x00,0x00,0x19,0x9C,0x25,0x7C,0x00,0x00,0x00,0x03,0x00,0x04,0x0C,0xA8,
+0x00,0x00,0x00,0x02,0x00,0x14,0x66,0x00,0x00,0x0E,0x25,0x7C,0x10,0x04,0x09,0x00,
+0x00,0x00,0x60,0x00,0x00,0x0A,0x25,0x7C,0x10,0x04,0x00,0x00,0x00,0x00,0x33,0x7C,
+0x05,0xFC,0x00,0x06,0x22,0x00,0xE9,0x89,0x00,0x81,0x00,0x00,0x00,0x01,0x33,0xC1,
+0xFF,0xFC,0x15,0xC0,0x08,0x39,0x00,0x00,0xFF,0xFC,0x15,0xC0,0x66,0x00,0xFF,0xF6,
+0x35,0x7C,0x00,0x1F,0x00,0x14,0x00,0xAA,0x00,0x00,0x00,0x30,0x00,0x00,0x4E,0x75,
+0x20,0x70,0x09,0xB0,0x00,0x00,0x18,0x52,0x42,0x68,0x00,0x14,0x02,0xA8,0xFF,0xFF,
+0xFF,0xCF,0x00,0x00,0x02,0x70,0xEF,0xFF,0x09,0xB0,0x00,0x00,0x19,0xAA,0x61,0x00,
+0x03,0x70,0x22,0x30,0x09,0xB0,0x00,0x00,0x10,0x04,0x42,0xB0,0x19,0x90,0x4E,0x75,
+0x0C,0xB0,0x00,0x00,0x00,0x0A,0x09,0xB0,0x00,0x00,0x19,0x78,0x67,0x00,0x00,0xA8,
+0x22,0x30,0x09,0xB0,0x00,0x00,0x19,0x68,0x24,0x01,0x4C,0x3C,0x20,0x00,0x00,0x00,
+0x00,0x0C,0xD4,0xB0,0x09,0xB0,0x00,0x00,0x10,0x04,0x06,0x82,0x00,0x00,0x00,0x1C,
+0x0C,0xB0,0x00,0x00,0x00,0x10,0x29,0x90,0x66,0x00,0x00,0x7C,0x20,0x70,0x29,0xA0,
+0x00,0x04,0xE7,0x89,0xD2,0xB0,0x09,0xB0,0x00,0x00,0x18,0x72,0x22,0x70,0x19,0xA0,
+0x00,0x04,0x24,0x30,0x29,0xA0,0x00,0x08,0x31,0x82,0x19,0xA0,0x00,0x02,0x56,0x82,
+0x02,0x82,0xFF,0xFF,0xFF,0xFC,0x23,0xC8,0xFF,0xF9,0x01,0x04,0x23,0xC9,0xFF,0xF9,
+0x01,0x08,0x23,0xC2,0xFF,0xF9,0x01,0x0C,0x23,0xFC,0x00,0x00,0x01,0x03,0xFF,0xF9,
+0x01,0x28,0x61,0x00,0x01,0xF6,0x08,0xF0,0x00,0x1F,0x19,0x90,0x22,0x30,0x09,0xB0,
+0x00,0x00,0x19,0x68,0x52,0x81,0x0C,0x81,0x00,0x00,0x00,0x0A,0x66,0x00,0x00,0x04,
+0x42,0x81,0x21,0x81,0x09,0xB0,0x00,0x00,0x19,0x68,0x52,0xB0,0x09,0xB0,0x00,0x00,
+0x19,0x78,0x60,0x00,0xFF,0x4C,0x4E,0x75,0x22,0x30,0x09,0xB0,0x00,0x00,0x19,0x88,
+0xE7,0x89,0xD2,0xB0,0x09,0xB0,0x00,0x00,0x18,0x82,0x34,0x30,0x19,0x90,0x08,0x02,
+0x00,0x0F,0x66,0x00,0x01,0x12,0x08,0x02,0x00,0x01,0x66,0x00,0x00,0xE6,0x4A,0x70,
+0x09,0xB0,0x00,0x00,0x19,0x9C,0x66,0x00,0x00,0x06,0x08,0x82,0x00,0x02,0x02,0x42,
+0x0C,0xBC,0x0C,0x42,0x0C,0x00,0x66,0x00,0x00,0xDC,0x42,0x83,0x36,0x30,0x19,0xA0,
+0x00,0x02,0x96,0x70,0x09,0xB0,0x00,0x00,0x19,0x9C,0x0C,0x43,0x05,0xF8,0x6E,0x00,
+0x00,0xC4,0x24,0x3A,0x04,0x84,0x4C,0x3C,0x20,0x00,0x00,0x00,0x00,0x0C,0xD4,0xBA,
+0xFA,0xF4,0x0C,0xB0,0x00,0x00,0x00,0x00,0x29,0x90,0x66,0x00,0x00,0x96,0x21,0x83,
+0x29,0xA0,0x00,0x08,0x20,0x70,0x19,0xA0,0x00,0x04,0x22,0x70,0x29,0xA0,0x00,0x04,
+0x4A,0x89,0x67,0x00,0x00,0x2A,0x56,0x83,0x02,0x83,0xFF,0xFF,0xFF,0xFC,0x23,0xC8,
+0xFF,0xF9,0x01,0x1C,0x23,0xC9,0xFF,0xF9,0x01,0x18,0x23,0xC3,0xFF,0xF9,0x01,0x20,
+0x23,0xFC,0x00,0x00,0x03,0x01,0xFF,0xF9,0x01,0x28,0x61,0x00,0x01,0x2C,0x21,0xB0,
+0x09,0xB0,0x00,0x00,0x18,0xC2,0x29,0x90,0x08,0xC6,0x00,0x04,0x24,0x3A,0x04,0x1A,
+0x52,0x82,0x0C,0x82,0x00,0x00,0x00,0x28,0x66,0x00,0x00,0x04,0x42,0x82,0x23,0xC2,
+0x00,0x00,0x19,0x98,0x02,0x70,0xF0,0x00,0x19,0x90,0x08,0xF0,0x00,0x1F,0x19,0x90,
+0x22,0x30,0x09,0xB0,0x00,0x00,0x19,0x88,0x52,0x81,0x0C,0x81,0x00,0x00,0x00,0x1E,
+0x66,0x00,0x00,0x04,0x42,0x81,0x21,0x81,0x09,0xB0,0x00,0x00,0x19,0x88,0x60,0x00,
+0xFE,0xF8,0x24,0x30,0x09,0xB0,0x00,0x00,0x10,0x04,0x52,0xB0,0x29,0xA0,0x00,0x08,
+0x60,0x00,0xFF,0xC2,0x24,0x30,0x09,0xB0,0x00,0x00,0x10,0x04,0x52,0xB0,0x29,0xA0,
+0x00,0x0C,0x60,0x00,0xFF,0xB0,0x4E,0x75,0x4A,0xB0,0x09,0xB0,0x00,0x00,0x19,0x78,
+0x67,0x00,0x00,0x86,0x22,0x30,0x09,0xB0,0x00,0x00,0x19,0x58,0x24,0x01,0xE7,0x89,
+0xD2,0xB0,0x09,0xB0,0x00,0x00,0x18,0x72,0x36,0x30,0x19,0x90,0x08,0x03,0x00,0x0F,
+0x66,0x00,0x00,0x66,0x8C,0xB0,0x09,0xB0,0x00,0x00,0x18,0xA2,0x53,0xB0,0x09,0xB0,
+0x00,0x00,0x19,0x78,0x22,0x30,0x09,0xB0,0x00,0x00,0x19,0x58,0x52,0x81,0x0C,0x81,
+0x00,0x00,0x00,0x0A,0x66,0x00,0x00,0x04,0x42,0x81,0x21,0x81,0x09,0xB0,0x00,0x00,
+0x19,0x58,0x4C,0x3C,0x20,0x00,0x00,0x00,0x00,0x0C,0xD4,0xB0,0x09,0xB0,0x00,0x00,
+0x10,0x04,0x06,0x82,0x00,0x00,0x00,0x1C,0x08,0x03,0x00,0x01,0x66,0x00,0x00,0x0E,
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