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-rw-r--r--drivers/net/ethernet/seeq/Kconfig34
-rw-r--r--drivers/net/ethernet/seeq/Makefile7
-rw-r--r--drivers/net/ethernet/seeq/ether3.c894
-rw-r--r--drivers/net/ethernet/seeq/ether3.h174
-rw-r--r--drivers/net/ethernet/seeq/sgiseeq.c848
-rw-r--r--drivers/net/ethernet/seeq/sgiseeq.h104
6 files changed, 2061 insertions, 0 deletions
diff --git a/drivers/net/ethernet/seeq/Kconfig b/drivers/net/ethernet/seeq/Kconfig
new file mode 100644
index 000000000..ad1df3757
--- /dev/null
+++ b/drivers/net/ethernet/seeq/Kconfig
@@ -0,0 +1,34 @@
+# SPDX-License-Identifier: GPL-2.0-only
+#
+# SEEQ device configuration
+#
+
+config NET_VENDOR_SEEQ
+ bool "SEEQ devices"
+ default y
+ depends on HAS_IOMEM
+ help
+ If you have a network (Ethernet) card belonging to this class, say Y.
+
+ Note that the answer to this question doesn't directly affect the
+ kernel: saying N will just cause the configurator to skip all
+ the questions about SEEQ devices. If you say Y, you will be asked for
+ your specific card in the following questions.
+
+if NET_VENDOR_SEEQ
+
+config ARM_ETHER3
+ tristate "Acorn/ANT Ether3 support"
+ depends on ARM && ARCH_ACORN
+ help
+ If you have an Acorn system with one of these network cards, you
+ should say Y to this option if you wish to use it with Linux.
+
+config SGISEEQ
+ tristate "SGI Seeq ethernet controller support"
+ depends on SGI_HAS_SEEQ
+ help
+ Say Y here if you have an Seeq based Ethernet network card. This is
+ used in many Silicon Graphics machines.
+
+endif # NET_VENDOR_SEEQ
diff --git a/drivers/net/ethernet/seeq/Makefile b/drivers/net/ethernet/seeq/Makefile
new file mode 100644
index 000000000..02aad7869
--- /dev/null
+++ b/drivers/net/ethernet/seeq/Makefile
@@ -0,0 +1,7 @@
+# SPDX-License-Identifier: GPL-2.0-only
+#
+# Makefile for the SEEQ network device drivers
+#
+
+obj-$(CONFIG_ARM_ETHER3) += ether3.o
+obj-$(CONFIG_SGISEEQ) += sgiseeq.o
diff --git a/drivers/net/ethernet/seeq/ether3.c b/drivers/net/ethernet/seeq/ether3.c
new file mode 100644
index 000000000..65c98837e
--- /dev/null
+++ b/drivers/net/ethernet/seeq/ether3.c
@@ -0,0 +1,894 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * linux/drivers/acorn/net/ether3.c
+ *
+ * Copyright (C) 1995-2000 Russell King
+ *
+ * SEEQ nq8005 ethernet driver for Acorn/ANT Ether3 card
+ * for Acorn machines
+ *
+ * By Russell King, with some suggestions from borris@ant.co.uk
+ *
+ * Changelog:
+ * 1.04 RMK 29/02/1996 Won't pass packets that are from our ethernet
+ * address up to the higher levels - they're
+ * silently ignored. I/F can now be put into
+ * multicast mode. Receiver routine optimised.
+ * 1.05 RMK 30/02/1996 Now claims interrupt at open when part of
+ * the kernel rather than when a module.
+ * 1.06 RMK 02/03/1996 Various code cleanups
+ * 1.07 RMK 13/10/1996 Optimised interrupt routine and transmit
+ * routines.
+ * 1.08 RMK 14/10/1996 Fixed problem with too many packets,
+ * prevented the kernel message about dropped
+ * packets appearing too many times a second.
+ * Now does not disable all IRQs, only the IRQ
+ * used by this card.
+ * 1.09 RMK 10/11/1996 Only enables TX irq when buffer space is low,
+ * but we still service the TX queue if we get a
+ * RX interrupt.
+ * 1.10 RMK 15/07/1997 Fixed autoprobing of NQ8004.
+ * 1.11 RMK 16/11/1997 Fixed autoprobing of NQ8005A.
+ * 1.12 RMK 31/12/1997 Removed reference to dev_tint for Linux 2.1.
+ * RMK 27/06/1998 Changed asm/delay.h to linux/delay.h.
+ * 1.13 RMK 29/06/1998 Fixed problem with transmission of packets.
+ * Chip seems to have a bug in, whereby if the
+ * packet starts two bytes from the end of the
+ * buffer, it corrupts the receiver chain, and
+ * never updates the transmit status correctly.
+ * 1.14 RMK 07/01/1998 Added initial code for ETHERB addressing.
+ * 1.15 RMK 30/04/1999 More fixes to the transmit routine for buggy
+ * hardware.
+ * 1.16 RMK 10/02/2000 Updated for 2.3.43
+ * 1.17 RMK 13/05/2000 Updated for 2.3.99-pre8
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/fcntl.h>
+#include <linux/interrupt.h>
+#include <linux/ioport.h>
+#include <linux/in.h>
+#include <linux/slab.h>
+#include <linux/string.h>
+#include <linux/errno.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/skbuff.h>
+#include <linux/device.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+#include <linux/bitops.h>
+
+#include <asm/ecard.h>
+#include <asm/io.h>
+
+static char version[] = "ether3 ethernet driver (c) 1995-2000 R.M.King v1.17\n";
+
+#include "ether3.h"
+
+static unsigned int net_debug = NET_DEBUG;
+
+static void ether3_setmulticastlist(struct net_device *dev);
+static int ether3_rx(struct net_device *dev, unsigned int maxcnt);
+static void ether3_tx(struct net_device *dev);
+static int ether3_open (struct net_device *dev);
+static netdev_tx_t ether3_sendpacket(struct sk_buff *skb,
+ struct net_device *dev);
+static irqreturn_t ether3_interrupt (int irq, void *dev_id);
+static int ether3_close (struct net_device *dev);
+static void ether3_setmulticastlist (struct net_device *dev);
+static void ether3_timeout(struct net_device *dev, unsigned int txqueue);
+
+#define BUS_16 2
+#define BUS_8 1
+#define BUS_UNKNOWN 0
+
+/* --------------------------------------------------------------------------- */
+
+typedef enum {
+ buffer_write,
+ buffer_read
+} buffer_rw_t;
+
+/*
+ * ether3 read/write. Slow things down a bit...
+ * The SEEQ8005 doesn't like us writing to its registers
+ * too quickly.
+ */
+static inline void ether3_outb(int v, void __iomem *r)
+{
+ writeb(v, r);
+ udelay(1);
+}
+
+static inline void ether3_outw(int v, void __iomem *r)
+{
+ writew(v, r);
+ udelay(1);
+}
+#define ether3_inb(r) ({ unsigned int __v = readb((r)); udelay(1); __v; })
+#define ether3_inw(r) ({ unsigned int __v = readw((r)); udelay(1); __v; })
+
+static int
+ether3_setbuffer(struct net_device *dev, buffer_rw_t read, int start)
+{
+ int timeout = 1000;
+
+ ether3_outw(priv(dev)->regs.config1 | CFG1_LOCBUFMEM, REG_CONFIG1);
+ ether3_outw(priv(dev)->regs.command | CMD_FIFOWRITE, REG_COMMAND);
+
+ while ((ether3_inw(REG_STATUS) & STAT_FIFOEMPTY) == 0) {
+ if (!timeout--) {
+ printk("%s: setbuffer broken\n", dev->name);
+ priv(dev)->broken = 1;
+ return 1;
+ }
+ udelay(1);
+ }
+
+ if (read == buffer_read) {
+ ether3_outw(start, REG_DMAADDR);
+ ether3_outw(priv(dev)->regs.command | CMD_FIFOREAD, REG_COMMAND);
+ } else {
+ ether3_outw(priv(dev)->regs.command | CMD_FIFOWRITE, REG_COMMAND);
+ ether3_outw(start, REG_DMAADDR);
+ }
+ return 0;
+}
+
+/*
+ * write data to the buffer memory
+ */
+#define ether3_writebuffer(dev,data,length) \
+ writesw(REG_BUFWIN, (data), (length) >> 1)
+
+#define ether3_writeword(dev,data) \
+ writew((data), REG_BUFWIN)
+
+#define ether3_writelong(dev,data) { \
+ void __iomem *reg_bufwin = REG_BUFWIN; \
+ writew((data), reg_bufwin); \
+ writew((data) >> 16, reg_bufwin); \
+}
+
+/*
+ * read data from the buffer memory
+ */
+#define ether3_readbuffer(dev,data,length) \
+ readsw(REG_BUFWIN, (data), (length) >> 1)
+
+#define ether3_readword(dev) \
+ readw(REG_BUFWIN)
+
+#define ether3_readlong(dev) \
+ readw(REG_BUFWIN) | (readw(REG_BUFWIN) << 16)
+
+/*
+ * Switch LED off...
+ */
+static void ether3_ledoff(struct timer_list *t)
+{
+ struct dev_priv *private = from_timer(private, t, timer);
+ struct net_device *dev = private->dev;
+
+ ether3_outw(priv(dev)->regs.config2 |= CFG2_CTRLO, REG_CONFIG2);
+}
+
+/*
+ * switch LED on...
+ */
+static inline void ether3_ledon(struct net_device *dev)
+{
+ del_timer(&priv(dev)->timer);
+ priv(dev)->timer.expires = jiffies + HZ / 50; /* leave on for 1/50th second */
+ add_timer(&priv(dev)->timer);
+ if (priv(dev)->regs.config2 & CFG2_CTRLO)
+ ether3_outw(priv(dev)->regs.config2 &= ~CFG2_CTRLO, REG_CONFIG2);
+}
+
+/*
+ * Read the ethernet address string from the on board rom.
+ * This is an ascii string!!!
+ */
+static int
+ether3_addr(char *addr, struct expansion_card *ec)
+{
+ struct in_chunk_dir cd;
+ char *s;
+
+ if (ecard_readchunk(&cd, ec, 0xf5, 0) && (s = strchr(cd.d.string, '('))) {
+ int i;
+ for (i = 0; i<6; i++) {
+ addr[i] = simple_strtoul(s + 1, &s, 0x10);
+ if (*s != (i==5?')' : ':' ))
+ break;
+ }
+ if (i == 6)
+ return 0;
+ }
+ /* I wonder if we should even let the user continue in this case
+ * - no, it would be better to disable the device
+ */
+ printk(KERN_ERR "ether3: Couldn't read a valid MAC address from card.\n");
+ return -ENODEV;
+}
+
+/* --------------------------------------------------------------------------- */
+
+static int
+ether3_ramtest(struct net_device *dev, unsigned char byte)
+{
+ unsigned char *buffer = kmalloc(RX_END, GFP_KERNEL);
+ int i,ret = 0;
+ int max_errors = 4;
+ int bad = -1;
+
+ if (!buffer)
+ return 1;
+
+ memset(buffer, byte, RX_END);
+ ether3_setbuffer(dev, buffer_write, 0);
+ ether3_writebuffer(dev, buffer, TX_END);
+ ether3_setbuffer(dev, buffer_write, RX_START);
+ ether3_writebuffer(dev, buffer + RX_START, RX_LEN);
+ memset(buffer, byte ^ 0xff, RX_END);
+ ether3_setbuffer(dev, buffer_read, 0);
+ ether3_readbuffer(dev, buffer, TX_END);
+ ether3_setbuffer(dev, buffer_read, RX_START);
+ ether3_readbuffer(dev, buffer + RX_START, RX_LEN);
+
+ for (i = 0; i < RX_END; i++) {
+ if (buffer[i] != byte) {
+ if (max_errors > 0 && bad != buffer[i]) {
+ printk("%s: RAM failed with (%02X instead of %02X) at 0x%04X",
+ dev->name, buffer[i], byte, i);
+ ret = 2;
+ max_errors--;
+ bad = i;
+ }
+ } else {
+ if (bad != -1) {
+ if (bad != i - 1)
+ printk(" - 0x%04X\n", i - 1);
+ printk("\n");
+ bad = -1;
+ }
+ }
+ }
+ if (bad != -1)
+ printk(" - 0xffff\n");
+ kfree(buffer);
+
+ return ret;
+}
+
+/* ------------------------------------------------------------------------------- */
+
+static int ether3_init_2(struct net_device *dev)
+{
+ int i;
+
+ priv(dev)->regs.config1 = CFG1_RECVCOMPSTAT0|CFG1_DMABURST8;
+ priv(dev)->regs.config2 = CFG2_CTRLO|CFG2_RECVCRC|CFG2_ERRENCRC;
+ priv(dev)->regs.command = 0;
+
+ /*
+ * Set up our hardware address
+ */
+ ether3_outw(priv(dev)->regs.config1 | CFG1_BUFSELSTAT0, REG_CONFIG1);
+ for (i = 0; i < 6; i++)
+ ether3_outb(dev->dev_addr[i], REG_BUFWIN);
+
+ if (dev->flags & IFF_PROMISC)
+ priv(dev)->regs.config1 |= CFG1_RECVPROMISC;
+ else if (dev->flags & IFF_MULTICAST)
+ priv(dev)->regs.config1 |= CFG1_RECVSPECBRMULTI;
+ else
+ priv(dev)->regs.config1 |= CFG1_RECVSPECBROAD;
+
+ /*
+ * There is a problem with the NQ8005 in that it occasionally loses the
+ * last two bytes. To get round this problem, we receive the CRC as
+ * well. That way, if we do lose the last two, then it doesn't matter.
+ */
+ ether3_outw(priv(dev)->regs.config1 | CFG1_TRANSEND, REG_CONFIG1);
+ ether3_outw((TX_END>>8) - 1, REG_BUFWIN);
+ ether3_outw(priv(dev)->rx_head, REG_RECVPTR);
+ ether3_outw(0, REG_TRANSMITPTR);
+ ether3_outw(priv(dev)->rx_head >> 8, REG_RECVEND);
+ ether3_outw(priv(dev)->regs.config2, REG_CONFIG2);
+ ether3_outw(priv(dev)->regs.config1 | CFG1_LOCBUFMEM, REG_CONFIG1);
+ ether3_outw(priv(dev)->regs.command, REG_COMMAND);
+
+ i = ether3_ramtest(dev, 0x5A);
+ if(i)
+ return i;
+ i = ether3_ramtest(dev, 0x1E);
+ if(i)
+ return i;
+
+ ether3_setbuffer(dev, buffer_write, 0);
+ ether3_writelong(dev, 0);
+ return 0;
+}
+
+static void
+ether3_init_for_open(struct net_device *dev)
+{
+ int i;
+
+ /* Reset the chip */
+ ether3_outw(CFG2_RESET, REG_CONFIG2);
+ udelay(4);
+
+ priv(dev)->regs.command = 0;
+ ether3_outw(CMD_RXOFF|CMD_TXOFF, REG_COMMAND);
+ while (ether3_inw(REG_STATUS) & (STAT_RXON|STAT_TXON))
+ barrier();
+
+ ether3_outw(priv(dev)->regs.config1 | CFG1_BUFSELSTAT0, REG_CONFIG1);
+ for (i = 0; i < 6; i++)
+ ether3_outb(dev->dev_addr[i], REG_BUFWIN);
+
+ priv(dev)->tx_head = 0;
+ priv(dev)->tx_tail = 0;
+ priv(dev)->regs.config2 |= CFG2_CTRLO;
+ priv(dev)->rx_head = RX_START;
+
+ ether3_outw(priv(dev)->regs.config1 | CFG1_TRANSEND, REG_CONFIG1);
+ ether3_outw((TX_END>>8) - 1, REG_BUFWIN);
+ ether3_outw(priv(dev)->rx_head, REG_RECVPTR);
+ ether3_outw(priv(dev)->rx_head >> 8, REG_RECVEND);
+ ether3_outw(0, REG_TRANSMITPTR);
+ ether3_outw(priv(dev)->regs.config2, REG_CONFIG2);
+ ether3_outw(priv(dev)->regs.config1 | CFG1_LOCBUFMEM, REG_CONFIG1);
+
+ ether3_setbuffer(dev, buffer_write, 0);
+ ether3_writelong(dev, 0);
+
+ priv(dev)->regs.command = CMD_ENINTRX | CMD_ENINTTX;
+ ether3_outw(priv(dev)->regs.command | CMD_RXON, REG_COMMAND);
+}
+
+static inline int
+ether3_probe_bus_8(struct net_device *dev, int val)
+{
+ int write_low, write_high, read_low, read_high;
+
+ write_low = val & 255;
+ write_high = val >> 8;
+
+ printk(KERN_DEBUG "ether3_probe: write8 [%02X:%02X]", write_high, write_low);
+
+ ether3_outb(write_low, REG_RECVPTR);
+ ether3_outb(write_high, REG_RECVPTR + 4);
+
+ read_low = ether3_inb(REG_RECVPTR);
+ read_high = ether3_inb(REG_RECVPTR + 4);
+
+ printk(", read8 [%02X:%02X]\n", read_high, read_low);
+
+ return read_low == write_low && read_high == write_high;
+}
+
+static inline int
+ether3_probe_bus_16(struct net_device *dev, int val)
+{
+ int read_val;
+
+ ether3_outw(val, REG_RECVPTR);
+ read_val = ether3_inw(REG_RECVPTR);
+
+ printk(KERN_DEBUG "ether3_probe: write16 [%04X], read16 [%04X]\n", val, read_val);
+
+ return read_val == val;
+}
+
+/*
+ * Open/initialize the board. This is called (in the current kernel)
+ * sometime after booting when the 'ifconfig' program is run.
+ *
+ * This routine should set everything up anew at each open, even
+ * registers that "should" only need to be set once at boot, so that
+ * there is non-reboot way to recover if something goes wrong.
+ */
+static int
+ether3_open(struct net_device *dev)
+{
+ if (request_irq(dev->irq, ether3_interrupt, 0, "ether3", dev))
+ return -EAGAIN;
+
+ ether3_init_for_open(dev);
+
+ netif_start_queue(dev);
+
+ return 0;
+}
+
+/*
+ * The inverse routine to ether3_open().
+ */
+static int
+ether3_close(struct net_device *dev)
+{
+ netif_stop_queue(dev);
+
+ disable_irq(dev->irq);
+
+ ether3_outw(CMD_RXOFF|CMD_TXOFF, REG_COMMAND);
+ priv(dev)->regs.command = 0;
+ while (ether3_inw(REG_STATUS) & (STAT_RXON|STAT_TXON))
+ barrier();
+ ether3_outb(0x80, REG_CONFIG2 + 4);
+ ether3_outw(0, REG_COMMAND);
+
+ free_irq(dev->irq, dev);
+
+ return 0;
+}
+
+/*
+ * Set or clear promiscuous/multicast mode filter for this adaptor.
+ *
+ * We don't attempt any packet filtering. The card may have a SEEQ 8004
+ * in which does not have the other ethernet address registers present...
+ */
+static void ether3_setmulticastlist(struct net_device *dev)
+{
+ priv(dev)->regs.config1 &= ~CFG1_RECVPROMISC;
+
+ if (dev->flags & IFF_PROMISC) {
+ /* promiscuous mode */
+ priv(dev)->regs.config1 |= CFG1_RECVPROMISC;
+ } else if (dev->flags & IFF_ALLMULTI || !netdev_mc_empty(dev)) {
+ priv(dev)->regs.config1 |= CFG1_RECVSPECBRMULTI;
+ } else
+ priv(dev)->regs.config1 |= CFG1_RECVSPECBROAD;
+
+ ether3_outw(priv(dev)->regs.config1 | CFG1_LOCBUFMEM, REG_CONFIG1);
+}
+
+static void ether3_timeout(struct net_device *dev, unsigned int txqueue)
+{
+ unsigned long flags;
+
+ del_timer(&priv(dev)->timer);
+
+ local_irq_save(flags);
+ printk(KERN_ERR "%s: transmit timed out, network cable problem?\n", dev->name);
+ printk(KERN_ERR "%s: state: { status=%04X cfg1=%04X cfg2=%04X }\n", dev->name,
+ ether3_inw(REG_STATUS), ether3_inw(REG_CONFIG1), ether3_inw(REG_CONFIG2));
+ printk(KERN_ERR "%s: { rpr=%04X rea=%04X tpr=%04X }\n", dev->name,
+ ether3_inw(REG_RECVPTR), ether3_inw(REG_RECVEND), ether3_inw(REG_TRANSMITPTR));
+ printk(KERN_ERR "%s: tx head=%X tx tail=%X\n", dev->name,
+ priv(dev)->tx_head, priv(dev)->tx_tail);
+ ether3_setbuffer(dev, buffer_read, priv(dev)->tx_tail);
+ printk(KERN_ERR "%s: packet status = %08X\n", dev->name, ether3_readlong(dev));
+ local_irq_restore(flags);
+
+ priv(dev)->regs.config2 |= CFG2_CTRLO;
+ dev->stats.tx_errors += 1;
+ ether3_outw(priv(dev)->regs.config2, REG_CONFIG2);
+ priv(dev)->tx_head = priv(dev)->tx_tail = 0;
+
+ netif_wake_queue(dev);
+}
+
+/*
+ * Transmit a packet
+ */
+static netdev_tx_t
+ether3_sendpacket(struct sk_buff *skb, struct net_device *dev)
+{
+ unsigned long flags;
+ unsigned int length = ETH_ZLEN < skb->len ? skb->len : ETH_ZLEN;
+ unsigned int ptr, next_ptr;
+
+ if (priv(dev)->broken) {
+ dev_kfree_skb(skb);
+ dev->stats.tx_dropped++;
+ netif_start_queue(dev);
+ return NETDEV_TX_OK;
+ }
+
+ length = (length + 1) & ~1;
+ if (length != skb->len) {
+ if (skb_padto(skb, length))
+ goto out;
+ }
+
+ next_ptr = (priv(dev)->tx_head + 1) & 15;
+
+ local_irq_save(flags);
+
+ if (priv(dev)->tx_tail == next_ptr) {
+ local_irq_restore(flags);
+ return NETDEV_TX_BUSY; /* unable to queue */
+ }
+
+ ptr = 0x600 * priv(dev)->tx_head;
+ priv(dev)->tx_head = next_ptr;
+ next_ptr *= 0x600;
+
+#define TXHDR_FLAGS (TXHDR_TRANSMIT|TXHDR_CHAINCONTINUE|TXHDR_DATAFOLLOWS|TXHDR_ENSUCCESS)
+
+ ether3_setbuffer(dev, buffer_write, next_ptr);
+ ether3_writelong(dev, 0);
+ ether3_setbuffer(dev, buffer_write, ptr);
+ ether3_writelong(dev, 0);
+ ether3_writebuffer(dev, skb->data, length);
+ ether3_writeword(dev, htons(next_ptr));
+ ether3_writeword(dev, TXHDR_CHAINCONTINUE >> 16);
+ ether3_setbuffer(dev, buffer_write, ptr);
+ ether3_writeword(dev, htons((ptr + length + 4)));
+ ether3_writeword(dev, TXHDR_FLAGS >> 16);
+ ether3_ledon(dev);
+
+ if (!(ether3_inw(REG_STATUS) & STAT_TXON)) {
+ ether3_outw(ptr, REG_TRANSMITPTR);
+ ether3_outw(priv(dev)->regs.command | CMD_TXON, REG_COMMAND);
+ }
+
+ next_ptr = (priv(dev)->tx_head + 1) & 15;
+ local_irq_restore(flags);
+
+ dev_kfree_skb(skb);
+
+ if (priv(dev)->tx_tail == next_ptr)
+ netif_stop_queue(dev);
+
+ out:
+ return NETDEV_TX_OK;
+}
+
+static irqreturn_t
+ether3_interrupt(int irq, void *dev_id)
+{
+ struct net_device *dev = (struct net_device *)dev_id;
+ unsigned int status, handled = IRQ_NONE;
+
+#if NET_DEBUG > 1
+ if(net_debug & DEBUG_INT)
+ printk("eth3irq: %d ", irq);
+#endif
+
+ status = ether3_inw(REG_STATUS);
+
+ if (status & STAT_INTRX) {
+ ether3_outw(CMD_ACKINTRX | priv(dev)->regs.command, REG_COMMAND);
+ ether3_rx(dev, 12);
+ handled = IRQ_HANDLED;
+ }
+
+ if (status & STAT_INTTX) {
+ ether3_outw(CMD_ACKINTTX | priv(dev)->regs.command, REG_COMMAND);
+ ether3_tx(dev);
+ handled = IRQ_HANDLED;
+ }
+
+#if NET_DEBUG > 1
+ if(net_debug & DEBUG_INT)
+ printk("done\n");
+#endif
+ return handled;
+}
+
+/*
+ * If we have a good packet(s), get it/them out of the buffers.
+ */
+static int ether3_rx(struct net_device *dev, unsigned int maxcnt)
+{
+ unsigned int next_ptr = priv(dev)->rx_head, received = 0;
+
+ ether3_ledon(dev);
+
+ do {
+ unsigned int this_ptr, status;
+ unsigned char addrs[16];
+
+ /*
+ * read the first 16 bytes from the buffer.
+ * This contains the status bytes etc and ethernet addresses,
+ * and we also check the source ethernet address to see if
+ * it originated from us.
+ */
+ {
+ unsigned int temp_ptr;
+ ether3_setbuffer(dev, buffer_read, next_ptr);
+ temp_ptr = ether3_readword(dev);
+ status = ether3_readword(dev);
+ if ((status & (RXSTAT_DONE | RXHDR_CHAINCONTINUE | RXHDR_RECEIVE)) !=
+ (RXSTAT_DONE | RXHDR_CHAINCONTINUE) || !temp_ptr)
+ break;
+
+ this_ptr = next_ptr + 4;
+ next_ptr = ntohs(temp_ptr);
+ }
+ ether3_setbuffer(dev, buffer_read, this_ptr);
+ ether3_readbuffer(dev, addrs+2, 12);
+
+if (next_ptr < RX_START || next_ptr >= RX_END) {
+ printk("%s: bad next pointer @%04X: ", dev->name, priv(dev)->rx_head);
+ printk("%02X %02X %02X %02X ", next_ptr >> 8, next_ptr & 255, status & 255, status >> 8);
+ printk("%pM %pM\n", addrs + 2, addrs + 8);
+ next_ptr = priv(dev)->rx_head;
+ break;
+}
+ /*
+ * ignore our own packets...
+ */
+ if (!(*(unsigned long *)&dev->dev_addr[0] ^ *(unsigned long *)&addrs[2+6]) &&
+ !(*(unsigned short *)&dev->dev_addr[4] ^ *(unsigned short *)&addrs[2+10])) {
+ maxcnt ++; /* compensate for loopedback packet */
+ ether3_outw(next_ptr >> 8, REG_RECVEND);
+ } else
+ if (!(status & (RXSTAT_OVERSIZE|RXSTAT_CRCERROR|RXSTAT_DRIBBLEERROR|RXSTAT_SHORTPACKET))) {
+ unsigned int length = next_ptr - this_ptr;
+ struct sk_buff *skb;
+
+ if (next_ptr <= this_ptr)
+ length += RX_END - RX_START;
+
+ skb = netdev_alloc_skb(dev, length + 2);
+ if (skb) {
+ unsigned char *buf;
+
+ skb_reserve(skb, 2);
+ buf = skb_put(skb, length);
+ ether3_readbuffer(dev, buf + 12, length - 12);
+ ether3_outw(next_ptr >> 8, REG_RECVEND);
+ *(unsigned short *)(buf + 0) = *(unsigned short *)(addrs + 2);
+ *(unsigned long *)(buf + 2) = *(unsigned long *)(addrs + 4);
+ *(unsigned long *)(buf + 6) = *(unsigned long *)(addrs + 8);
+ *(unsigned short *)(buf + 10) = *(unsigned short *)(addrs + 12);
+ skb->protocol = eth_type_trans(skb, dev);
+ netif_rx(skb);
+ received ++;
+ } else {
+ ether3_outw(next_ptr >> 8, REG_RECVEND);
+ dev->stats.rx_dropped++;
+ goto done;
+ }
+ } else {
+ struct net_device_stats *stats = &dev->stats;
+ ether3_outw(next_ptr >> 8, REG_RECVEND);
+ if (status & RXSTAT_OVERSIZE) stats->rx_over_errors ++;
+ if (status & RXSTAT_CRCERROR) stats->rx_crc_errors ++;
+ if (status & RXSTAT_DRIBBLEERROR) stats->rx_fifo_errors ++;
+ if (status & RXSTAT_SHORTPACKET) stats->rx_length_errors ++;
+ stats->rx_errors++;
+ }
+ }
+ while (-- maxcnt);
+
+done:
+ dev->stats.rx_packets += received;
+ priv(dev)->rx_head = next_ptr;
+ /*
+ * If rx went off line, then that means that the buffer may be full. We
+ * have dropped at least one packet.
+ */
+ if (!(ether3_inw(REG_STATUS) & STAT_RXON)) {
+ dev->stats.rx_dropped++;
+ ether3_outw(next_ptr, REG_RECVPTR);
+ ether3_outw(priv(dev)->regs.command | CMD_RXON, REG_COMMAND);
+ }
+
+ return maxcnt;
+}
+
+/*
+ * Update stats for the transmitted packet(s)
+ */
+static void ether3_tx(struct net_device *dev)
+{
+ unsigned int tx_tail = priv(dev)->tx_tail;
+ int max_work = 14;
+
+ do {
+ unsigned long status;
+
+ /*
+ * Read the packet header
+ */
+ ether3_setbuffer(dev, buffer_read, tx_tail * 0x600);
+ status = ether3_readlong(dev);
+
+ /*
+ * Check to see if this packet has been transmitted
+ */
+ if ((status & (TXSTAT_DONE | TXHDR_TRANSMIT)) !=
+ (TXSTAT_DONE | TXHDR_TRANSMIT))
+ break;
+
+ /*
+ * Update errors
+ */
+ if (!(status & (TXSTAT_BABBLED | TXSTAT_16COLLISIONS)))
+ dev->stats.tx_packets++;
+ else {
+ dev->stats.tx_errors++;
+ if (status & TXSTAT_16COLLISIONS)
+ dev->stats.collisions += 16;
+ if (status & TXSTAT_BABBLED)
+ dev->stats.tx_fifo_errors++;
+ }
+
+ tx_tail = (tx_tail + 1) & 15;
+ } while (--max_work);
+
+ if (priv(dev)->tx_tail != tx_tail) {
+ priv(dev)->tx_tail = tx_tail;
+ netif_wake_queue(dev);
+ }
+}
+
+static void ether3_banner(void)
+{
+ static unsigned version_printed = 0;
+
+ if (net_debug && version_printed++ == 0)
+ printk(KERN_INFO "%s", version);
+}
+
+static const struct net_device_ops ether3_netdev_ops = {
+ .ndo_open = ether3_open,
+ .ndo_stop = ether3_close,
+ .ndo_start_xmit = ether3_sendpacket,
+ .ndo_set_rx_mode = ether3_setmulticastlist,
+ .ndo_tx_timeout = ether3_timeout,
+ .ndo_validate_addr = eth_validate_addr,
+ .ndo_set_mac_address = eth_mac_addr,
+};
+
+static int
+ether3_probe(struct expansion_card *ec, const struct ecard_id *id)
+{
+ const struct ether3_data *data = id->data;
+ struct net_device *dev;
+ int bus_type, ret;
+
+ ether3_banner();
+
+ ret = ecard_request_resources(ec);
+ if (ret)
+ goto out;
+
+ dev = alloc_etherdev(sizeof(struct dev_priv));
+ if (!dev) {
+ ret = -ENOMEM;
+ goto release;
+ }
+
+ SET_NETDEV_DEV(dev, &ec->dev);
+
+ priv(dev)->base = ecardm_iomap(ec, ECARD_RES_MEMC, 0, 0);
+ if (!priv(dev)->base) {
+ ret = -ENOMEM;
+ goto free;
+ }
+
+ ec->irqaddr = priv(dev)->base + data->base_offset;
+ ec->irqmask = 0xf0;
+
+ priv(dev)->seeq = priv(dev)->base + data->base_offset;
+ dev->irq = ec->irq;
+
+ ether3_addr(dev->dev_addr, ec);
+
+ priv(dev)->dev = dev;
+ timer_setup(&priv(dev)->timer, ether3_ledoff, 0);
+
+ /* Reset card...
+ */
+ ether3_outb(0x80, REG_CONFIG2 + 4);
+ bus_type = BUS_UNKNOWN;
+ udelay(4);
+
+ /* Test using Receive Pointer (16-bit register) to find out
+ * how the ether3 is connected to the bus...
+ */
+ if (ether3_probe_bus_8(dev, 0x100) &&
+ ether3_probe_bus_8(dev, 0x201))
+ bus_type = BUS_8;
+
+ if (bus_type == BUS_UNKNOWN &&
+ ether3_probe_bus_16(dev, 0x101) &&
+ ether3_probe_bus_16(dev, 0x201))
+ bus_type = BUS_16;
+
+ switch (bus_type) {
+ case BUS_UNKNOWN:
+ printk(KERN_ERR "%s: unable to identify bus width\n", dev->name);
+ ret = -ENODEV;
+ goto free;
+
+ case BUS_8:
+ printk(KERN_ERR "%s: %s found, but is an unsupported "
+ "8-bit card\n", dev->name, data->name);
+ ret = -ENODEV;
+ goto free;
+
+ default:
+ break;
+ }
+
+ if (ether3_init_2(dev)) {
+ ret = -ENODEV;
+ goto free;
+ }
+
+ dev->netdev_ops = &ether3_netdev_ops;
+ dev->watchdog_timeo = 5 * HZ / 100;
+
+ ret = register_netdev(dev);
+ if (ret)
+ goto free;
+
+ printk("%s: %s in slot %d, %pM\n",
+ dev->name, data->name, ec->slot_no, dev->dev_addr);
+
+ ecard_set_drvdata(ec, dev);
+ return 0;
+
+ free:
+ free_netdev(dev);
+ release:
+ ecard_release_resources(ec);
+ out:
+ return ret;
+}
+
+static void ether3_remove(struct expansion_card *ec)
+{
+ struct net_device *dev = ecard_get_drvdata(ec);
+
+ ecard_set_drvdata(ec, NULL);
+
+ unregister_netdev(dev);
+ free_netdev(dev);
+ ecard_release_resources(ec);
+}
+
+static struct ether3_data ether3 = {
+ .name = "ether3",
+ .base_offset = 0,
+};
+
+static struct ether3_data etherb = {
+ .name = "etherb",
+ .base_offset = 0x800,
+};
+
+static const struct ecard_id ether3_ids[] = {
+ { MANU_ANT2, PROD_ANT_ETHER3, &ether3 },
+ { MANU_ANT, PROD_ANT_ETHER3, &ether3 },
+ { MANU_ANT, PROD_ANT_ETHERB, &etherb },
+ { 0xffff, 0xffff }
+};
+
+static struct ecard_driver ether3_driver = {
+ .probe = ether3_probe,
+ .remove = ether3_remove,
+ .id_table = ether3_ids,
+ .drv = {
+ .name = "ether3",
+ },
+};
+
+static int __init ether3_init(void)
+{
+ return ecard_register_driver(&ether3_driver);
+}
+
+static void __exit ether3_exit(void)
+{
+ ecard_remove_driver(&ether3_driver);
+}
+
+module_init(ether3_init);
+module_exit(ether3_exit);
+
+MODULE_LICENSE("GPL");
diff --git a/drivers/net/ethernet/seeq/ether3.h b/drivers/net/ethernet/seeq/ether3.h
new file mode 100644
index 000000000..585dd51be
--- /dev/null
+++ b/drivers/net/ethernet/seeq/ether3.h
@@ -0,0 +1,174 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * linux/drivers/acorn/net/ether3.h
+ *
+ * Copyright (C) 1995-2000 Russell King
+ *
+ * network driver for Acorn/ANT Ether3 cards
+ */
+
+#ifndef _LINUX_ether3_H
+#define _LINUX_ether3_H
+
+/* use 0 for production, 1 for verification, >2 for debug. debug flags: */
+#define DEBUG_TX 2
+#define DEBUG_RX 4
+#define DEBUG_INT 8
+#define DEBUG_IC 16
+#ifndef NET_DEBUG
+#define NET_DEBUG 0
+#endif
+
+#define priv(dev) ((struct dev_priv *)netdev_priv(dev))
+
+/* Command register definitions & bits */
+#define REG_COMMAND (priv(dev)->seeq + 0x0000)
+#define CMD_ENINTDMA 0x0001
+#define CMD_ENINTRX 0x0002
+#define CMD_ENINTTX 0x0004
+#define CMD_ENINTBUFWIN 0x0008
+#define CMD_ACKINTDMA 0x0010
+#define CMD_ACKINTRX 0x0020
+#define CMD_ACKINTTX 0x0040
+#define CMD_ACKINTBUFWIN 0x0080
+#define CMD_DMAON 0x0100
+#define CMD_RXON 0x0200
+#define CMD_TXON 0x0400
+#define CMD_DMAOFF 0x0800
+#define CMD_RXOFF 0x1000
+#define CMD_TXOFF 0x2000
+#define CMD_FIFOREAD 0x4000
+#define CMD_FIFOWRITE 0x8000
+
+/* status register */
+#define REG_STATUS (priv(dev)->seeq + 0x0000)
+#define STAT_ENINTSTAT 0x0001
+#define STAT_ENINTRX 0x0002
+#define STAT_ENINTTX 0x0004
+#define STAT_ENINTBUFWIN 0x0008
+#define STAT_INTDMA 0x0010
+#define STAT_INTRX 0x0020
+#define STAT_INTTX 0x0040
+#define STAT_INTBUFWIN 0x0080
+#define STAT_DMAON 0x0100
+#define STAT_RXON 0x0200
+#define STAT_TXON 0x0400
+#define STAT_FIFOFULL 0x2000
+#define STAT_FIFOEMPTY 0x4000
+#define STAT_FIFODIR 0x8000
+
+/* configuration register 1 */
+#define REG_CONFIG1 (priv(dev)->seeq + 0x0040)
+#define CFG1_BUFSELSTAT0 0x0000
+#define CFG1_BUFSELSTAT1 0x0001
+#define CFG1_BUFSELSTAT2 0x0002
+#define CFG1_BUFSELSTAT3 0x0003
+#define CFG1_BUFSELSTAT4 0x0004
+#define CFG1_BUFSELSTAT5 0x0005
+#define CFG1_ADDRPROM 0x0006
+#define CFG1_TRANSEND 0x0007
+#define CFG1_LOCBUFMEM 0x0008
+#define CFG1_INTVECTOR 0x0009
+#define CFG1_RECVSPECONLY 0x0000
+#define CFG1_RECVSPECBROAD 0x4000
+#define CFG1_RECVSPECBRMULTI 0x8000
+#define CFG1_RECVPROMISC 0xC000
+
+/* The following aren't in 8004 */
+#define CFG1_DMABURSTCONT 0x0000
+#define CFG1_DMABURST800NS 0x0010
+#define CFG1_DMABURST1600NS 0x0020
+#define CFG1_DMABURST3200NS 0x0030
+#define CFG1_DMABURST1 0x0000
+#define CFG1_DMABURST4 0x0040
+#define CFG1_DMABURST8 0x0080
+#define CFG1_DMABURST16 0x00C0
+#define CFG1_RECVCOMPSTAT0 0x0100
+#define CFG1_RECVCOMPSTAT1 0x0200
+#define CFG1_RECVCOMPSTAT2 0x0400
+#define CFG1_RECVCOMPSTAT3 0x0800
+#define CFG1_RECVCOMPSTAT4 0x1000
+#define CFG1_RECVCOMPSTAT5 0x2000
+
+/* configuration register 2 */
+#define REG_CONFIG2 (priv(dev)->seeq + 0x0080)
+#define CFG2_BYTESWAP 0x0001
+#define CFG2_ERRENCRC 0x0008
+#define CFG2_ERRENDRIBBLE 0x0010
+#define CFG2_ERRSHORTFRAME 0x0020
+#define CFG2_SLOTSELECT 0x0040
+#define CFG2_PREAMSELECT 0x0080
+#define CFG2_ADDRLENGTH 0x0100
+#define CFG2_RECVCRC 0x0200
+#define CFG2_XMITNOCRC 0x0400
+#define CFG2_LOOPBACK 0x0800
+#define CFG2_CTRLO 0x1000
+#define CFG2_RESET 0x8000
+
+#define REG_RECVEND (priv(dev)->seeq + 0x00c0)
+
+#define REG_BUFWIN (priv(dev)->seeq + 0x0100)
+
+#define REG_RECVPTR (priv(dev)->seeq + 0x0140)
+
+#define REG_TRANSMITPTR (priv(dev)->seeq + 0x0180)
+
+#define REG_DMAADDR (priv(dev)->seeq + 0x01c0)
+
+/*
+ * Cards transmit/receive headers
+ */
+#define TX_NEXT (0xffff)
+#define TXHDR_ENBABBLEINT (1 << 16)
+#define TXHDR_ENCOLLISIONINT (1 << 17)
+#define TXHDR_EN16COLLISION (1 << 18)
+#define TXHDR_ENSUCCESS (1 << 19)
+#define TXHDR_DATAFOLLOWS (1 << 21)
+#define TXHDR_CHAINCONTINUE (1 << 22)
+#define TXHDR_TRANSMIT (1 << 23)
+#define TXSTAT_BABBLED (1 << 24)
+#define TXSTAT_COLLISION (1 << 25)
+#define TXSTAT_16COLLISIONS (1 << 26)
+#define TXSTAT_DONE (1 << 31)
+
+#define RX_NEXT (0xffff)
+#define RXHDR_CHAINCONTINUE (1 << 6)
+#define RXHDR_RECEIVE (1 << 7)
+#define RXSTAT_OVERSIZE (1 << 8)
+#define RXSTAT_CRCERROR (1 << 9)
+#define RXSTAT_DRIBBLEERROR (1 << 10)
+#define RXSTAT_SHORTPACKET (1 << 11)
+#define RXSTAT_DONE (1 << 15)
+
+
+#define TX_START 0x0000
+#define TX_END 0x6000
+#define RX_START 0x6000
+#define RX_LEN 0xA000
+#define RX_END 0x10000
+/* must be a power of 2 and greater than MAX_TX_BUFFERED */
+#define MAX_TXED 16
+#define MAX_TX_BUFFERED 10
+
+struct dev_priv {
+ void __iomem *base;
+ void __iomem *seeq;
+ struct {
+ unsigned int command;
+ unsigned int config1;
+ unsigned int config2;
+ } regs;
+ unsigned char tx_head; /* buffer nr to insert next packet */
+ unsigned char tx_tail; /* buffer nr of transmitting packet */
+ unsigned int rx_head; /* address to fetch next packet from */
+ struct timer_list timer;
+ struct net_device *dev;
+ int broken; /* 0 = ok, 1 = something went wrong */
+};
+
+struct ether3_data {
+ const char name[8];
+ unsigned long base_offset;
+};
+
+#endif
diff --git a/drivers/net/ethernet/seeq/sgiseeq.c b/drivers/net/ethernet/seeq/sgiseeq.c
new file mode 100644
index 000000000..37ff25a84
--- /dev/null
+++ b/drivers/net/ethernet/seeq/sgiseeq.c
@@ -0,0 +1,848 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * sgiseeq.c: Seeq8003 ethernet driver for SGI machines.
+ *
+ * Copyright (C) 1996 David S. Miller (davem@davemloft.net)
+ */
+
+#undef DEBUG
+
+#include <linux/dma-mapping.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/errno.h>
+#include <linux/types.h>
+#include <linux/interrupt.h>
+#include <linux/string.h>
+#include <linux/delay.h>
+#include <linux/netdevice.h>
+#include <linux/platform_device.h>
+#include <linux/etherdevice.h>
+#include <linux/skbuff.h>
+
+#include <asm/sgi/hpc3.h>
+#include <asm/sgi/ip22.h>
+#include <asm/sgi/seeq.h>
+
+#include "sgiseeq.h"
+
+static char *sgiseeqstr = "SGI Seeq8003";
+
+/*
+ * If you want speed, you do something silly, it always has worked for me. So,
+ * with that in mind, I've decided to make this driver look completely like a
+ * stupid Lance from a driver architecture perspective. Only difference is that
+ * here our "ring buffer" looks and acts like a real Lance one does but is
+ * laid out like how the HPC DMA and the Seeq want it to. You'd be surprised
+ * how a stupid idea like this can pay off in performance, not to mention
+ * making this driver 2,000 times easier to write. ;-)
+ */
+
+/* Tune these if we tend to run out often etc. */
+#define SEEQ_RX_BUFFERS 16
+#define SEEQ_TX_BUFFERS 16
+
+#define PKT_BUF_SZ 1584
+
+#define NEXT_RX(i) (((i) + 1) & (SEEQ_RX_BUFFERS - 1))
+#define NEXT_TX(i) (((i) + 1) & (SEEQ_TX_BUFFERS - 1))
+#define PREV_RX(i) (((i) - 1) & (SEEQ_RX_BUFFERS - 1))
+#define PREV_TX(i) (((i) - 1) & (SEEQ_TX_BUFFERS - 1))
+
+#define TX_BUFFS_AVAIL(sp) ((sp->tx_old <= sp->tx_new) ? \
+ sp->tx_old + (SEEQ_TX_BUFFERS - 1) - sp->tx_new : \
+ sp->tx_old - sp->tx_new - 1)
+
+#define VIRT_TO_DMA(sp, v) ((sp)->srings_dma + \
+ (dma_addr_t)((unsigned long)(v) - \
+ (unsigned long)((sp)->rx_desc)))
+
+/* Copy frames shorter than rx_copybreak, otherwise pass on up in
+ * a full sized sk_buff. Value of 100 stolen from tulip.c (!alpha).
+ */
+static int rx_copybreak = 100;
+
+#define PAD_SIZE (128 - sizeof(struct hpc_dma_desc) - sizeof(void *))
+
+struct sgiseeq_rx_desc {
+ volatile struct hpc_dma_desc rdma;
+ u8 padding[PAD_SIZE];
+ struct sk_buff *skb;
+};
+
+struct sgiseeq_tx_desc {
+ volatile struct hpc_dma_desc tdma;
+ u8 padding[PAD_SIZE];
+ struct sk_buff *skb;
+};
+
+/*
+ * Warning: This structure is laid out in a certain way because HPC dma
+ * descriptors must be 8-byte aligned. So don't touch this without
+ * some care.
+ */
+struct sgiseeq_init_block { /* Note the name ;-) */
+ struct sgiseeq_rx_desc rxvector[SEEQ_RX_BUFFERS];
+ struct sgiseeq_tx_desc txvector[SEEQ_TX_BUFFERS];
+};
+
+struct sgiseeq_private {
+ struct sgiseeq_init_block *srings;
+ dma_addr_t srings_dma;
+
+ /* Ptrs to the descriptors in uncached space. */
+ struct sgiseeq_rx_desc *rx_desc;
+ struct sgiseeq_tx_desc *tx_desc;
+
+ char *name;
+ struct hpc3_ethregs *hregs;
+ struct sgiseeq_regs *sregs;
+
+ /* Ring entry counters. */
+ unsigned int rx_new, tx_new;
+ unsigned int rx_old, tx_old;
+
+ int is_edlc;
+ unsigned char control;
+ unsigned char mode;
+
+ spinlock_t tx_lock;
+};
+
+static inline void dma_sync_desc_cpu(struct net_device *dev, void *addr)
+{
+ struct sgiseeq_private *sp = netdev_priv(dev);
+
+ dma_sync_single_for_cpu(dev->dev.parent, VIRT_TO_DMA(sp, addr),
+ sizeof(struct sgiseeq_rx_desc), DMA_BIDIRECTIONAL);
+}
+
+static inline void dma_sync_desc_dev(struct net_device *dev, void *addr)
+{
+ struct sgiseeq_private *sp = netdev_priv(dev);
+
+ dma_sync_single_for_device(dev->dev.parent, VIRT_TO_DMA(sp, addr),
+ sizeof(struct sgiseeq_rx_desc), DMA_BIDIRECTIONAL);
+}
+
+static inline void hpc3_eth_reset(struct hpc3_ethregs *hregs)
+{
+ hregs->reset = HPC3_ERST_CRESET | HPC3_ERST_CLRIRQ;
+ udelay(20);
+ hregs->reset = 0;
+}
+
+static inline void reset_hpc3_and_seeq(struct hpc3_ethregs *hregs,
+ struct sgiseeq_regs *sregs)
+{
+ hregs->rx_ctrl = hregs->tx_ctrl = 0;
+ hpc3_eth_reset(hregs);
+}
+
+#define RSTAT_GO_BITS (SEEQ_RCMD_IGOOD | SEEQ_RCMD_IEOF | SEEQ_RCMD_ISHORT | \
+ SEEQ_RCMD_IDRIB | SEEQ_RCMD_ICRC)
+
+static inline void seeq_go(struct sgiseeq_private *sp,
+ struct hpc3_ethregs *hregs,
+ struct sgiseeq_regs *sregs)
+{
+ sregs->rstat = sp->mode | RSTAT_GO_BITS;
+ hregs->rx_ctrl = HPC3_ERXCTRL_ACTIVE;
+}
+
+static inline void __sgiseeq_set_mac_address(struct net_device *dev)
+{
+ struct sgiseeq_private *sp = netdev_priv(dev);
+ struct sgiseeq_regs *sregs = sp->sregs;
+ int i;
+
+ sregs->tstat = SEEQ_TCMD_RB0;
+ for (i = 0; i < 6; i++)
+ sregs->rw.eth_addr[i] = dev->dev_addr[i];
+}
+
+static int sgiseeq_set_mac_address(struct net_device *dev, void *addr)
+{
+ struct sgiseeq_private *sp = netdev_priv(dev);
+ struct sockaddr *sa = addr;
+
+ memcpy(dev->dev_addr, sa->sa_data, dev->addr_len);
+
+ spin_lock_irq(&sp->tx_lock);
+ __sgiseeq_set_mac_address(dev);
+ spin_unlock_irq(&sp->tx_lock);
+
+ return 0;
+}
+
+#define TCNTINFO_INIT (HPCDMA_EOX | HPCDMA_ETXD)
+#define RCNTCFG_INIT (HPCDMA_OWN | HPCDMA_EORP | HPCDMA_XIE)
+#define RCNTINFO_INIT (RCNTCFG_INIT | (PKT_BUF_SZ & HPCDMA_BCNT))
+
+static int seeq_init_ring(struct net_device *dev)
+{
+ struct sgiseeq_private *sp = netdev_priv(dev);
+ int i;
+
+ netif_stop_queue(dev);
+ sp->rx_new = sp->tx_new = 0;
+ sp->rx_old = sp->tx_old = 0;
+
+ __sgiseeq_set_mac_address(dev);
+
+ /* Setup tx ring. */
+ for(i = 0; i < SEEQ_TX_BUFFERS; i++) {
+ sp->tx_desc[i].tdma.cntinfo = TCNTINFO_INIT;
+ dma_sync_desc_dev(dev, &sp->tx_desc[i]);
+ }
+
+ /* And now the rx ring. */
+ for (i = 0; i < SEEQ_RX_BUFFERS; i++) {
+ if (!sp->rx_desc[i].skb) {
+ dma_addr_t dma_addr;
+ struct sk_buff *skb = netdev_alloc_skb(dev, PKT_BUF_SZ);
+
+ if (skb == NULL)
+ return -ENOMEM;
+ skb_reserve(skb, 2);
+ dma_addr = dma_map_single(dev->dev.parent,
+ skb->data - 2,
+ PKT_BUF_SZ, DMA_FROM_DEVICE);
+ sp->rx_desc[i].skb = skb;
+ sp->rx_desc[i].rdma.pbuf = dma_addr;
+ }
+ sp->rx_desc[i].rdma.cntinfo = RCNTINFO_INIT;
+ dma_sync_desc_dev(dev, &sp->rx_desc[i]);
+ }
+ sp->rx_desc[i - 1].rdma.cntinfo |= HPCDMA_EOR;
+ dma_sync_desc_dev(dev, &sp->rx_desc[i - 1]);
+ return 0;
+}
+
+static void seeq_purge_ring(struct net_device *dev)
+{
+ struct sgiseeq_private *sp = netdev_priv(dev);
+ int i;
+
+ /* clear tx ring. */
+ for (i = 0; i < SEEQ_TX_BUFFERS; i++) {
+ if (sp->tx_desc[i].skb) {
+ dev_kfree_skb(sp->tx_desc[i].skb);
+ sp->tx_desc[i].skb = NULL;
+ }
+ }
+
+ /* And now the rx ring. */
+ for (i = 0; i < SEEQ_RX_BUFFERS; i++) {
+ if (sp->rx_desc[i].skb) {
+ dev_kfree_skb(sp->rx_desc[i].skb);
+ sp->rx_desc[i].skb = NULL;
+ }
+ }
+}
+
+#ifdef DEBUG
+static struct sgiseeq_private *gpriv;
+static struct net_device *gdev;
+
+static void sgiseeq_dump_rings(void)
+{
+ static int once;
+ struct sgiseeq_rx_desc *r = gpriv->rx_desc;
+ struct sgiseeq_tx_desc *t = gpriv->tx_desc;
+ struct hpc3_ethregs *hregs = gpriv->hregs;
+ int i;
+
+ if (once)
+ return;
+ once++;
+ printk("RING DUMP:\n");
+ for (i = 0; i < SEEQ_RX_BUFFERS; i++) {
+ printk("RX [%d]: @(%p) [%08x,%08x,%08x] ",
+ i, (&r[i]), r[i].rdma.pbuf, r[i].rdma.cntinfo,
+ r[i].rdma.pnext);
+ i += 1;
+ printk("-- [%d]: @(%p) [%08x,%08x,%08x]\n",
+ i, (&r[i]), r[i].rdma.pbuf, r[i].rdma.cntinfo,
+ r[i].rdma.pnext);
+ }
+ for (i = 0; i < SEEQ_TX_BUFFERS; i++) {
+ printk("TX [%d]: @(%p) [%08x,%08x,%08x] ",
+ i, (&t[i]), t[i].tdma.pbuf, t[i].tdma.cntinfo,
+ t[i].tdma.pnext);
+ i += 1;
+ printk("-- [%d]: @(%p) [%08x,%08x,%08x]\n",
+ i, (&t[i]), t[i].tdma.pbuf, t[i].tdma.cntinfo,
+ t[i].tdma.pnext);
+ }
+ printk("INFO: [rx_new = %d rx_old=%d] [tx_new = %d tx_old = %d]\n",
+ gpriv->rx_new, gpriv->rx_old, gpriv->tx_new, gpriv->tx_old);
+ printk("RREGS: rx_cbptr[%08x] rx_ndptr[%08x] rx_ctrl[%08x]\n",
+ hregs->rx_cbptr, hregs->rx_ndptr, hregs->rx_ctrl);
+ printk("TREGS: tx_cbptr[%08x] tx_ndptr[%08x] tx_ctrl[%08x]\n",
+ hregs->tx_cbptr, hregs->tx_ndptr, hregs->tx_ctrl);
+}
+#endif
+
+#define TSTAT_INIT_SEEQ (SEEQ_TCMD_IPT|SEEQ_TCMD_I16|SEEQ_TCMD_IC|SEEQ_TCMD_IUF)
+#define TSTAT_INIT_EDLC ((TSTAT_INIT_SEEQ) | SEEQ_TCMD_RB2)
+
+static int init_seeq(struct net_device *dev, struct sgiseeq_private *sp,
+ struct sgiseeq_regs *sregs)
+{
+ struct hpc3_ethregs *hregs = sp->hregs;
+ int err;
+
+ reset_hpc3_and_seeq(hregs, sregs);
+ err = seeq_init_ring(dev);
+ if (err)
+ return err;
+
+ /* Setup to field the proper interrupt types. */
+ if (sp->is_edlc) {
+ sregs->tstat = TSTAT_INIT_EDLC;
+ sregs->rw.wregs.control = sp->control;
+ sregs->rw.wregs.frame_gap = 0;
+ } else {
+ sregs->tstat = TSTAT_INIT_SEEQ;
+ }
+
+ hregs->rx_ndptr = VIRT_TO_DMA(sp, sp->rx_desc);
+ hregs->tx_ndptr = VIRT_TO_DMA(sp, sp->tx_desc);
+
+ seeq_go(sp, hregs, sregs);
+ return 0;
+}
+
+static void record_rx_errors(struct net_device *dev, unsigned char status)
+{
+ if (status & SEEQ_RSTAT_OVERF ||
+ status & SEEQ_RSTAT_SFRAME)
+ dev->stats.rx_over_errors++;
+ if (status & SEEQ_RSTAT_CERROR)
+ dev->stats.rx_crc_errors++;
+ if (status & SEEQ_RSTAT_DERROR)
+ dev->stats.rx_frame_errors++;
+ if (status & SEEQ_RSTAT_REOF)
+ dev->stats.rx_errors++;
+}
+
+static inline void rx_maybe_restart(struct sgiseeq_private *sp,
+ struct hpc3_ethregs *hregs,
+ struct sgiseeq_regs *sregs)
+{
+ if (!(hregs->rx_ctrl & HPC3_ERXCTRL_ACTIVE)) {
+ hregs->rx_ndptr = VIRT_TO_DMA(sp, sp->rx_desc + sp->rx_new);
+ seeq_go(sp, hregs, sregs);
+ }
+}
+
+static inline void sgiseeq_rx(struct net_device *dev, struct sgiseeq_private *sp,
+ struct hpc3_ethregs *hregs,
+ struct sgiseeq_regs *sregs)
+{
+ struct sgiseeq_rx_desc *rd;
+ struct sk_buff *skb = NULL;
+ struct sk_buff *newskb;
+ unsigned char pkt_status;
+ int len = 0;
+ unsigned int orig_end = PREV_RX(sp->rx_new);
+
+ /* Service every received packet. */
+ rd = &sp->rx_desc[sp->rx_new];
+ dma_sync_desc_cpu(dev, rd);
+ while (!(rd->rdma.cntinfo & HPCDMA_OWN)) {
+ len = PKT_BUF_SZ - (rd->rdma.cntinfo & HPCDMA_BCNT) - 3;
+ dma_unmap_single(dev->dev.parent, rd->rdma.pbuf,
+ PKT_BUF_SZ, DMA_FROM_DEVICE);
+ pkt_status = rd->skb->data[len];
+ if (pkt_status & SEEQ_RSTAT_FIG) {
+ /* Packet is OK. */
+ /* We don't want to receive our own packets */
+ if (!ether_addr_equal(rd->skb->data + 6, dev->dev_addr)) {
+ if (len > rx_copybreak) {
+ skb = rd->skb;
+ newskb = netdev_alloc_skb(dev, PKT_BUF_SZ);
+ if (!newskb) {
+ newskb = skb;
+ skb = NULL;
+ goto memory_squeeze;
+ }
+ skb_reserve(newskb, 2);
+ } else {
+ skb = netdev_alloc_skb_ip_align(dev, len);
+ if (skb)
+ skb_copy_to_linear_data(skb, rd->skb->data, len);
+
+ newskb = rd->skb;
+ }
+memory_squeeze:
+ if (skb) {
+ skb_put(skb, len);
+ skb->protocol = eth_type_trans(skb, dev);
+ netif_rx(skb);
+ dev->stats.rx_packets++;
+ dev->stats.rx_bytes += len;
+ } else {
+ dev->stats.rx_dropped++;
+ }
+ } else {
+ /* Silently drop my own packets */
+ newskb = rd->skb;
+ }
+ } else {
+ record_rx_errors(dev, pkt_status);
+ newskb = rd->skb;
+ }
+ rd->skb = newskb;
+ rd->rdma.pbuf = dma_map_single(dev->dev.parent,
+ newskb->data - 2,
+ PKT_BUF_SZ, DMA_FROM_DEVICE);
+
+ /* Return the entry to the ring pool. */
+ rd->rdma.cntinfo = RCNTINFO_INIT;
+ sp->rx_new = NEXT_RX(sp->rx_new);
+ dma_sync_desc_dev(dev, rd);
+ rd = &sp->rx_desc[sp->rx_new];
+ dma_sync_desc_cpu(dev, rd);
+ }
+ dma_sync_desc_dev(dev, rd);
+
+ dma_sync_desc_cpu(dev, &sp->rx_desc[orig_end]);
+ sp->rx_desc[orig_end].rdma.cntinfo &= ~(HPCDMA_EOR);
+ dma_sync_desc_dev(dev, &sp->rx_desc[orig_end]);
+ dma_sync_desc_cpu(dev, &sp->rx_desc[PREV_RX(sp->rx_new)]);
+ sp->rx_desc[PREV_RX(sp->rx_new)].rdma.cntinfo |= HPCDMA_EOR;
+ dma_sync_desc_dev(dev, &sp->rx_desc[PREV_RX(sp->rx_new)]);
+ rx_maybe_restart(sp, hregs, sregs);
+}
+
+static inline void tx_maybe_reset_collisions(struct sgiseeq_private *sp,
+ struct sgiseeq_regs *sregs)
+{
+ if (sp->is_edlc) {
+ sregs->rw.wregs.control = sp->control & ~(SEEQ_CTRL_XCNT);
+ sregs->rw.wregs.control = sp->control;
+ }
+}
+
+static inline void kick_tx(struct net_device *dev,
+ struct sgiseeq_private *sp,
+ struct hpc3_ethregs *hregs)
+{
+ struct sgiseeq_tx_desc *td;
+ int i = sp->tx_old;
+
+ /* If the HPC aint doin nothin, and there are more packets
+ * with ETXD cleared and XIU set we must make very certain
+ * that we restart the HPC else we risk locking up the
+ * adapter. The following code is only safe iff the HPCDMA
+ * is not active!
+ */
+ td = &sp->tx_desc[i];
+ dma_sync_desc_cpu(dev, td);
+ while ((td->tdma.cntinfo & (HPCDMA_XIU | HPCDMA_ETXD)) ==
+ (HPCDMA_XIU | HPCDMA_ETXD)) {
+ i = NEXT_TX(i);
+ td = &sp->tx_desc[i];
+ dma_sync_desc_cpu(dev, td);
+ }
+ if (td->tdma.cntinfo & HPCDMA_XIU) {
+ dma_sync_desc_dev(dev, td);
+ hregs->tx_ndptr = VIRT_TO_DMA(sp, td);
+ hregs->tx_ctrl = HPC3_ETXCTRL_ACTIVE;
+ }
+}
+
+static inline void sgiseeq_tx(struct net_device *dev, struct sgiseeq_private *sp,
+ struct hpc3_ethregs *hregs,
+ struct sgiseeq_regs *sregs)
+{
+ struct sgiseeq_tx_desc *td;
+ unsigned long status = hregs->tx_ctrl;
+ int j;
+
+ tx_maybe_reset_collisions(sp, sregs);
+
+ if (!(status & (HPC3_ETXCTRL_ACTIVE | SEEQ_TSTAT_PTRANS))) {
+ /* Oops, HPC detected some sort of error. */
+ if (status & SEEQ_TSTAT_R16)
+ dev->stats.tx_aborted_errors++;
+ if (status & SEEQ_TSTAT_UFLOW)
+ dev->stats.tx_fifo_errors++;
+ if (status & SEEQ_TSTAT_LCLS)
+ dev->stats.collisions++;
+ }
+
+ /* Ack 'em... */
+ for (j = sp->tx_old; j != sp->tx_new; j = NEXT_TX(j)) {
+ td = &sp->tx_desc[j];
+
+ dma_sync_desc_cpu(dev, td);
+ if (!(td->tdma.cntinfo & (HPCDMA_XIU)))
+ break;
+ if (!(td->tdma.cntinfo & (HPCDMA_ETXD))) {
+ dma_sync_desc_dev(dev, td);
+ if (!(status & HPC3_ETXCTRL_ACTIVE)) {
+ hregs->tx_ndptr = VIRT_TO_DMA(sp, td);
+ hregs->tx_ctrl = HPC3_ETXCTRL_ACTIVE;
+ }
+ break;
+ }
+ dev->stats.tx_packets++;
+ sp->tx_old = NEXT_TX(sp->tx_old);
+ td->tdma.cntinfo &= ~(HPCDMA_XIU | HPCDMA_XIE);
+ td->tdma.cntinfo |= HPCDMA_EOX;
+ if (td->skb) {
+ dev_kfree_skb_any(td->skb);
+ td->skb = NULL;
+ }
+ dma_sync_desc_dev(dev, td);
+ }
+}
+
+static irqreturn_t sgiseeq_interrupt(int irq, void *dev_id)
+{
+ struct net_device *dev = (struct net_device *) dev_id;
+ struct sgiseeq_private *sp = netdev_priv(dev);
+ struct hpc3_ethregs *hregs = sp->hregs;
+ struct sgiseeq_regs *sregs = sp->sregs;
+
+ spin_lock(&sp->tx_lock);
+
+ /* Ack the IRQ and set software state. */
+ hregs->reset = HPC3_ERST_CLRIRQ;
+
+ /* Always check for received packets. */
+ sgiseeq_rx(dev, sp, hregs, sregs);
+
+ /* Only check for tx acks if we have something queued. */
+ if (sp->tx_old != sp->tx_new)
+ sgiseeq_tx(dev, sp, hregs, sregs);
+
+ if ((TX_BUFFS_AVAIL(sp) > 0) && netif_queue_stopped(dev)) {
+ netif_wake_queue(dev);
+ }
+ spin_unlock(&sp->tx_lock);
+
+ return IRQ_HANDLED;
+}
+
+static int sgiseeq_open(struct net_device *dev)
+{
+ struct sgiseeq_private *sp = netdev_priv(dev);
+ struct sgiseeq_regs *sregs = sp->sregs;
+ unsigned int irq = dev->irq;
+ int err;
+
+ if (request_irq(irq, sgiseeq_interrupt, 0, sgiseeqstr, dev)) {
+ printk(KERN_ERR "Seeq8003: Can't get irq %d\n", dev->irq);
+ return -EAGAIN;
+ }
+
+ err = init_seeq(dev, sp, sregs);
+ if (err)
+ goto out_free_irq;
+
+ netif_start_queue(dev);
+
+ return 0;
+
+out_free_irq:
+ free_irq(irq, dev);
+
+ return err;
+}
+
+static int sgiseeq_close(struct net_device *dev)
+{
+ struct sgiseeq_private *sp = netdev_priv(dev);
+ struct sgiseeq_regs *sregs = sp->sregs;
+ unsigned int irq = dev->irq;
+
+ netif_stop_queue(dev);
+
+ /* Shutdown the Seeq. */
+ reset_hpc3_and_seeq(sp->hregs, sregs);
+ free_irq(irq, dev);
+ seeq_purge_ring(dev);
+
+ return 0;
+}
+
+static inline int sgiseeq_reset(struct net_device *dev)
+{
+ struct sgiseeq_private *sp = netdev_priv(dev);
+ struct sgiseeq_regs *sregs = sp->sregs;
+ int err;
+
+ err = init_seeq(dev, sp, sregs);
+ if (err)
+ return err;
+
+ netif_trans_update(dev); /* prevent tx timeout */
+ netif_wake_queue(dev);
+
+ return 0;
+}
+
+static netdev_tx_t
+sgiseeq_start_xmit(struct sk_buff *skb, struct net_device *dev)
+{
+ struct sgiseeq_private *sp = netdev_priv(dev);
+ struct hpc3_ethregs *hregs = sp->hregs;
+ unsigned long flags;
+ struct sgiseeq_tx_desc *td;
+ int len, entry;
+
+ spin_lock_irqsave(&sp->tx_lock, flags);
+
+ /* Setup... */
+ len = skb->len;
+ if (len < ETH_ZLEN) {
+ if (skb_padto(skb, ETH_ZLEN)) {
+ spin_unlock_irqrestore(&sp->tx_lock, flags);
+ return NETDEV_TX_OK;
+ }
+ len = ETH_ZLEN;
+ }
+
+ dev->stats.tx_bytes += len;
+ entry = sp->tx_new;
+ td = &sp->tx_desc[entry];
+ dma_sync_desc_cpu(dev, td);
+
+ /* Create entry. There are so many races with adding a new
+ * descriptor to the chain:
+ * 1) Assume that the HPC is off processing a DMA chain while
+ * we are changing all of the following.
+ * 2) Do no allow the HPC to look at a new descriptor until
+ * we have completely set up it's state. This means, do
+ * not clear HPCDMA_EOX in the current last descritptor
+ * until the one we are adding looks consistent and could
+ * be processes right now.
+ * 3) The tx interrupt code must notice when we've added a new
+ * entry and the HPC got to the end of the chain before we
+ * added this new entry and restarted it.
+ */
+ td->skb = skb;
+ td->tdma.pbuf = dma_map_single(dev->dev.parent, skb->data,
+ len, DMA_TO_DEVICE);
+ td->tdma.cntinfo = (len & HPCDMA_BCNT) |
+ HPCDMA_XIU | HPCDMA_EOXP | HPCDMA_XIE | HPCDMA_EOX;
+ dma_sync_desc_dev(dev, td);
+ if (sp->tx_old != sp->tx_new) {
+ struct sgiseeq_tx_desc *backend;
+
+ backend = &sp->tx_desc[PREV_TX(sp->tx_new)];
+ dma_sync_desc_cpu(dev, backend);
+ backend->tdma.cntinfo &= ~HPCDMA_EOX;
+ dma_sync_desc_dev(dev, backend);
+ }
+ sp->tx_new = NEXT_TX(sp->tx_new); /* Advance. */
+
+ /* Maybe kick the HPC back into motion. */
+ if (!(hregs->tx_ctrl & HPC3_ETXCTRL_ACTIVE))
+ kick_tx(dev, sp, hregs);
+
+ if (!TX_BUFFS_AVAIL(sp))
+ netif_stop_queue(dev);
+ spin_unlock_irqrestore(&sp->tx_lock, flags);
+
+ return NETDEV_TX_OK;
+}
+
+static void timeout(struct net_device *dev, unsigned int txqueue)
+{
+ printk(KERN_NOTICE "%s: transmit timed out, resetting\n", dev->name);
+ sgiseeq_reset(dev);
+
+ netif_trans_update(dev); /* prevent tx timeout */
+ netif_wake_queue(dev);
+}
+
+static void sgiseeq_set_multicast(struct net_device *dev)
+{
+ struct sgiseeq_private *sp = netdev_priv(dev);
+ unsigned char oldmode = sp->mode;
+
+ if(dev->flags & IFF_PROMISC)
+ sp->mode = SEEQ_RCMD_RANY;
+ else if ((dev->flags & IFF_ALLMULTI) || !netdev_mc_empty(dev))
+ sp->mode = SEEQ_RCMD_RBMCAST;
+ else
+ sp->mode = SEEQ_RCMD_RBCAST;
+
+ /* XXX I know this sucks, but is there a better way to reprogram
+ * XXX the receiver? At least, this shouldn't happen too often.
+ */
+
+ if (oldmode != sp->mode)
+ sgiseeq_reset(dev);
+}
+
+static inline void setup_tx_ring(struct net_device *dev,
+ struct sgiseeq_tx_desc *buf,
+ int nbufs)
+{
+ struct sgiseeq_private *sp = netdev_priv(dev);
+ int i = 0;
+
+ while (i < (nbufs - 1)) {
+ buf[i].tdma.pnext = VIRT_TO_DMA(sp, buf + i + 1);
+ buf[i].tdma.pbuf = 0;
+ dma_sync_desc_dev(dev, &buf[i]);
+ i++;
+ }
+ buf[i].tdma.pnext = VIRT_TO_DMA(sp, buf);
+ dma_sync_desc_dev(dev, &buf[i]);
+}
+
+static inline void setup_rx_ring(struct net_device *dev,
+ struct sgiseeq_rx_desc *buf,
+ int nbufs)
+{
+ struct sgiseeq_private *sp = netdev_priv(dev);
+ int i = 0;
+
+ while (i < (nbufs - 1)) {
+ buf[i].rdma.pnext = VIRT_TO_DMA(sp, buf + i + 1);
+ buf[i].rdma.pbuf = 0;
+ dma_sync_desc_dev(dev, &buf[i]);
+ i++;
+ }
+ buf[i].rdma.pbuf = 0;
+ buf[i].rdma.pnext = VIRT_TO_DMA(sp, buf);
+ dma_sync_desc_dev(dev, &buf[i]);
+}
+
+static const struct net_device_ops sgiseeq_netdev_ops = {
+ .ndo_open = sgiseeq_open,
+ .ndo_stop = sgiseeq_close,
+ .ndo_start_xmit = sgiseeq_start_xmit,
+ .ndo_tx_timeout = timeout,
+ .ndo_set_rx_mode = sgiseeq_set_multicast,
+ .ndo_set_mac_address = sgiseeq_set_mac_address,
+ .ndo_validate_addr = eth_validate_addr,
+};
+
+static int sgiseeq_probe(struct platform_device *pdev)
+{
+ struct sgiseeq_platform_data *pd = dev_get_platdata(&pdev->dev);
+ struct hpc3_regs *hpcregs = pd->hpc;
+ struct sgiseeq_init_block *sr;
+ unsigned int irq = pd->irq;
+ struct sgiseeq_private *sp;
+ struct net_device *dev;
+ int err;
+
+ dev = alloc_etherdev(sizeof (struct sgiseeq_private));
+ if (!dev) {
+ err = -ENOMEM;
+ goto err_out;
+ }
+
+ platform_set_drvdata(pdev, dev);
+ SET_NETDEV_DEV(dev, &pdev->dev);
+ sp = netdev_priv(dev);
+
+ /* Make private data page aligned */
+ sr = dma_alloc_noncoherent(&pdev->dev, sizeof(*sp->srings),
+ &sp->srings_dma, DMA_BIDIRECTIONAL, GFP_KERNEL);
+ if (!sr) {
+ printk(KERN_ERR "Sgiseeq: Page alloc failed, aborting.\n");
+ err = -ENOMEM;
+ goto err_out_free_dev;
+ }
+ sp->srings = sr;
+ sp->rx_desc = sp->srings->rxvector;
+ sp->tx_desc = sp->srings->txvector;
+ spin_lock_init(&sp->tx_lock);
+
+ /* A couple calculations now, saves many cycles later. */
+ setup_rx_ring(dev, sp->rx_desc, SEEQ_RX_BUFFERS);
+ setup_tx_ring(dev, sp->tx_desc, SEEQ_TX_BUFFERS);
+
+ memcpy(dev->dev_addr, pd->mac, ETH_ALEN);
+
+#ifdef DEBUG
+ gpriv = sp;
+ gdev = dev;
+#endif
+ sp->sregs = (struct sgiseeq_regs *) &hpcregs->eth_ext[0];
+ sp->hregs = &hpcregs->ethregs;
+ sp->name = sgiseeqstr;
+ sp->mode = SEEQ_RCMD_RBCAST;
+
+ /* Setup PIO and DMA transfer timing */
+ sp->hregs->pconfig = 0x161;
+ sp->hregs->dconfig = HPC3_EDCFG_FIRQ | HPC3_EDCFG_FEOP |
+ HPC3_EDCFG_FRXDC | HPC3_EDCFG_PTO | 0x026;
+
+ /* Setup PIO and DMA transfer timing */
+ sp->hregs->pconfig = 0x161;
+ sp->hregs->dconfig = HPC3_EDCFG_FIRQ | HPC3_EDCFG_FEOP |
+ HPC3_EDCFG_FRXDC | HPC3_EDCFG_PTO | 0x026;
+
+ /* Reset the chip. */
+ hpc3_eth_reset(sp->hregs);
+
+ sp->is_edlc = !(sp->sregs->rw.rregs.collision_tx[0] & 0xff);
+ if (sp->is_edlc)
+ sp->control = SEEQ_CTRL_XCNT | SEEQ_CTRL_ACCNT |
+ SEEQ_CTRL_SFLAG | SEEQ_CTRL_ESHORT |
+ SEEQ_CTRL_ENCARR;
+
+ dev->netdev_ops = &sgiseeq_netdev_ops;
+ dev->watchdog_timeo = (200 * HZ) / 1000;
+ dev->irq = irq;
+
+ if (register_netdev(dev)) {
+ printk(KERN_ERR "Sgiseeq: Cannot register net device, "
+ "aborting.\n");
+ err = -ENODEV;
+ goto err_out_free_attrs;
+ }
+
+ printk(KERN_INFO "%s: %s %pM\n", dev->name, sgiseeqstr, dev->dev_addr);
+
+ return 0;
+
+err_out_free_attrs:
+ dma_free_noncoherent(&pdev->dev, sizeof(*sp->srings), sp->srings,
+ sp->srings_dma, DMA_BIDIRECTIONAL);
+err_out_free_dev:
+ free_netdev(dev);
+
+err_out:
+ return err;
+}
+
+static int sgiseeq_remove(struct platform_device *pdev)
+{
+ struct net_device *dev = platform_get_drvdata(pdev);
+ struct sgiseeq_private *sp = netdev_priv(dev);
+
+ unregister_netdev(dev);
+ dma_free_noncoherent(&pdev->dev, sizeof(*sp->srings), sp->srings,
+ sp->srings_dma, DMA_BIDIRECTIONAL);
+ free_netdev(dev);
+
+ return 0;
+}
+
+static struct platform_driver sgiseeq_driver = {
+ .probe = sgiseeq_probe,
+ .remove = sgiseeq_remove,
+ .driver = {
+ .name = "sgiseeq",
+ }
+};
+
+module_platform_driver(sgiseeq_driver);
+
+MODULE_DESCRIPTION("SGI Seeq 8003 driver");
+MODULE_AUTHOR("Linux/MIPS Mailing List <linux-mips@linux-mips.org>");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:sgiseeq");
diff --git a/drivers/net/ethernet/seeq/sgiseeq.h b/drivers/net/ethernet/seeq/sgiseeq.h
new file mode 100644
index 000000000..2f65c5560
--- /dev/null
+++ b/drivers/net/ethernet/seeq/sgiseeq.h
@@ -0,0 +1,104 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * sgiseeq.h: Defines for the Seeq8003 ethernet controller.
+ *
+ * Copyright (C) 1996 David S. Miller (davem@davemloft.net)
+ */
+#ifndef _SGISEEQ_H
+#define _SGISEEQ_H
+
+struct sgiseeq_wregs {
+ volatile unsigned int multicase_high[2];
+ volatile unsigned int frame_gap;
+ volatile unsigned int control;
+};
+
+struct sgiseeq_rregs {
+ volatile unsigned int collision_tx[2];
+ volatile unsigned int collision_all[2];
+ volatile unsigned int _unused0;
+ volatile unsigned int rflags;
+};
+
+struct sgiseeq_regs {
+ union {
+ volatile unsigned int eth_addr[6];
+ volatile unsigned int multicast_low[6];
+ struct sgiseeq_wregs wregs;
+ struct sgiseeq_rregs rregs;
+ } rw;
+ volatile unsigned int rstat;
+ volatile unsigned int tstat;
+};
+
+/* Seeq8003 receive status register */
+#define SEEQ_RSTAT_OVERF 0x001 /* Overflow */
+#define SEEQ_RSTAT_CERROR 0x002 /* CRC error */
+#define SEEQ_RSTAT_DERROR 0x004 /* Dribble error */
+#define SEEQ_RSTAT_SFRAME 0x008 /* Short frame */
+#define SEEQ_RSTAT_REOF 0x010 /* Received end of frame */
+#define SEEQ_RSTAT_FIG 0x020 /* Frame is good */
+#define SEEQ_RSTAT_TIMEO 0x040 /* Timeout, or late receive */
+#define SEEQ_RSTAT_WHICH 0x080 /* Which status, 1=old 0=new */
+#define SEEQ_RSTAT_LITTLE 0x100 /* DMA is done in little endian format */
+#define SEEQ_RSTAT_SDMA 0x200 /* DMA has started */
+#define SEEQ_RSTAT_ADMA 0x400 /* DMA is active */
+#define SEEQ_RSTAT_ROVERF 0x800 /* Receive buffer overflow */
+
+/* Seeq8003 receive command register */
+#define SEEQ_RCMD_RDISAB 0x000 /* Disable receiver on the Seeq8003 */
+#define SEEQ_RCMD_IOVERF 0x001 /* IRQ on buffer overflows */
+#define SEEQ_RCMD_ICRC 0x002 /* IRQ on CRC errors */
+#define SEEQ_RCMD_IDRIB 0x004 /* IRQ on dribble errors */
+#define SEEQ_RCMD_ISHORT 0x008 /* IRQ on short frames */
+#define SEEQ_RCMD_IEOF 0x010 /* IRQ on end of frame */
+#define SEEQ_RCMD_IGOOD 0x020 /* IRQ on good frames */
+#define SEEQ_RCMD_RANY 0x040 /* Receive any frame */
+#define SEEQ_RCMD_RBCAST 0x080 /* Receive broadcasts */
+#define SEEQ_RCMD_RBMCAST 0x0c0 /* Receive broadcasts/multicasts */
+
+/* Seeq8003 transmit status register */
+#define SEEQ_TSTAT_UFLOW 0x001 /* Transmit buffer underflow */
+#define SEEQ_TSTAT_CLS 0x002 /* Collision detected */
+#define SEEQ_TSTAT_R16 0x004 /* Did 16 retries to tx a frame */
+#define SEEQ_TSTAT_PTRANS 0x008 /* Packet was transmitted ok */
+#define SEEQ_TSTAT_LCLS 0x010 /* Late collision occurred */
+#define SEEQ_TSTAT_WHICH 0x080 /* Which status, 1=old 0=new */
+#define SEEQ_TSTAT_TLE 0x100 /* DMA is done in little endian format */
+#define SEEQ_TSTAT_SDMA 0x200 /* DMA has started */
+#define SEEQ_TSTAT_ADMA 0x400 /* DMA is active */
+
+/* Seeq8003 transmit command register */
+#define SEEQ_TCMD_RB0 0x00 /* Register bank zero w/station addr */
+#define SEEQ_TCMD_IUF 0x01 /* IRQ on tx underflow */
+#define SEEQ_TCMD_IC 0x02 /* IRQ on collisions */
+#define SEEQ_TCMD_I16 0x04 /* IRQ after 16 failed attempts to tx frame */
+#define SEEQ_TCMD_IPT 0x08 /* IRQ when packet successfully transmitted */
+#define SEEQ_TCMD_RB1 0x20 /* Register bank one w/multi-cast low byte */
+#define SEEQ_TCMD_RB2 0x40 /* Register bank two w/multi-cast high byte */
+
+/* Seeq8003 control register */
+#define SEEQ_CTRL_XCNT 0x01
+#define SEEQ_CTRL_ACCNT 0x02
+#define SEEQ_CTRL_SFLAG 0x04
+#define SEEQ_CTRL_EMULTI 0x08
+#define SEEQ_CTRL_ESHORT 0x10
+#define SEEQ_CTRL_ENCARR 0x20
+
+/* Seeq8003 control registers on the SGI Hollywood HPC. */
+#define SEEQ_HPIO_P1BITS 0x00000001 /* cycles to stay in P1 phase for PIO */
+#define SEEQ_HPIO_P2BITS 0x00000060 /* cycles to stay in P2 phase for PIO */
+#define SEEQ_HPIO_P3BITS 0x00000100 /* cycles to stay in P3 phase for PIO */
+#define SEEQ_HDMA_D1BITS 0x00000006 /* cycles to stay in D1 phase for DMA */
+#define SEEQ_HDMA_D2BITS 0x00000020 /* cycles to stay in D2 phase for DMA */
+#define SEEQ_HDMA_D3BITS 0x00000000 /* cycles to stay in D3 phase for DMA */
+#define SEEQ_HDMA_TIMEO 0x00030000 /* cycles for DMA timeout */
+#define SEEQ_HCTL_NORM 0x00000000 /* Normal operation mode */
+#define SEEQ_HCTL_RESET 0x00000001 /* Reset Seeq8003 and HPC interface */
+#define SEEQ_HCTL_IPEND 0x00000002 /* IRQ is pending for the chip */
+#define SEEQ_HCTL_IPG 0x00001000 /* Inter-packet gap */
+#define SEEQ_HCTL_RFIX 0x00002000 /* At rxdc, clear end-of-packet */
+#define SEEQ_HCTL_EFIX 0x00004000 /* fixes intr status bit settings */
+#define SEEQ_HCTL_IFIX 0x00008000 /* enable startup timeouts */
+
+#endif /* !(_SGISEEQ_H) */
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-28 14:50:35 +0000