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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/char/pcmcia
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/char/pcmcia')
-rw-r--r--drivers/char/pcmcia/Kconfig68
-rw-r--r--drivers/char/pcmcia/Makefile11
-rw-r--r--drivers/char/pcmcia/cm4000_cs.c1912
-rw-r--r--drivers/char/pcmcia/cm4040_cs.c684
-rw-r--r--drivers/char/pcmcia/cm4040_cs.h48
-rw-r--r--drivers/char/pcmcia/scr24x_cs.c359
-rw-r--r--drivers/char/pcmcia/synclink_cs.c4292
7 files changed, 7374 insertions, 0 deletions
diff --git a/drivers/char/pcmcia/Kconfig b/drivers/char/pcmcia/Kconfig
new file mode 100644
index 000000000..f5d589b2b
--- /dev/null
+++ b/drivers/char/pcmcia/Kconfig
@@ -0,0 +1,68 @@
+# SPDX-License-Identifier: GPL-2.0-only
+#
+# PCMCIA character device configuration
+#
+
+menu "PCMCIA character devices"
+ depends on PCMCIA!=n
+
+config SYNCLINK_CS
+ tristate "SyncLink PC Card support"
+ depends on PCMCIA && TTY
+ help
+ Enable support for the SyncLink PC Card serial adapter, running
+ asynchronous and HDLC communications up to 512Kbps. The port is
+ selectable for RS-232, V.35, RS-449, RS-530, and X.21
+
+ This driver may be built as a module ( = code which can be
+ inserted in and removed from the running kernel whenever you want).
+ The module will be called synclink_cs. If you want to do that, say M
+ here.
+
+config CARDMAN_4000
+ tristate "Omnikey Cardman 4000 support"
+ depends on PCMCIA
+ select BITREVERSE
+ help
+ Enable support for the Omnikey Cardman 4000 PCMCIA Smartcard
+ reader.
+
+ This kernel driver requires additional userspace support, either
+ by the vendor-provided PC/SC ifd_handler (http://www.omnikey.com/),
+ or via the cm4000 backend of OpenCT (http://www.opensc-project.org/opensc).
+
+config CARDMAN_4040
+ tristate "Omnikey CardMan 4040 support"
+ depends on PCMCIA
+ help
+ Enable support for the Omnikey CardMan 4040 PCMCIA Smartcard
+ reader.
+
+ This card is basically a USB CCID device connected to a FIFO
+ in I/O space. To use the kernel driver, you will need either the
+ PC/SC ifdhandler provided from the Omnikey homepage
+ (http://www.omnikey.com/), or a current development version of OpenCT
+ (http://www.opensc-project.org/opensc).
+
+config SCR24X
+ tristate "SCR24x Chip Card Interface support"
+ depends on PCMCIA
+ help
+ Enable support for the SCR24x PCMCIA Chip Card Interface.
+
+ To compile this driver as a module, choose M here.
+ The module will be called scr24x_cs..
+
+ If unsure say N.
+
+config IPWIRELESS
+ tristate "IPWireless 3G UMTS PCMCIA card support"
+ depends on PCMCIA && NETDEVICES && TTY
+ select PPP
+ help
+ This is a driver for 3G UMTS PCMCIA card from IPWireless company. In
+ some countries (for example Czech Republic, T-Mobile ISP) this card
+ is shipped for service called UMTS 4G.
+
+endmenu
+
diff --git a/drivers/char/pcmcia/Makefile b/drivers/char/pcmcia/Makefile
new file mode 100644
index 000000000..024eed1c4
--- /dev/null
+++ b/drivers/char/pcmcia/Makefile
@@ -0,0 +1,11 @@
+# SPDX-License-Identifier: GPL-2.0-only
+#
+# drivers/char/pcmcia/Makefile
+#
+# Makefile for the Linux PCMCIA char device drivers.
+#
+
+obj-$(CONFIG_SYNCLINK_CS) += synclink_cs.o
+obj-$(CONFIG_CARDMAN_4000) += cm4000_cs.o
+obj-$(CONFIG_CARDMAN_4040) += cm4040_cs.o
+obj-$(CONFIG_SCR24X) += scr24x_cs.o
diff --git a/drivers/char/pcmcia/cm4000_cs.c b/drivers/char/pcmcia/cm4000_cs.c
new file mode 100644
index 000000000..e656f42a2
--- /dev/null
+++ b/drivers/char/pcmcia/cm4000_cs.c
@@ -0,0 +1,1912 @@
+ /*
+ * A driver for the PCMCIA Smartcard Reader "Omnikey CardMan Mobile 4000"
+ *
+ * cm4000_cs.c support.linux@omnikey.com
+ *
+ * Tue Oct 23 11:32:43 GMT 2001 herp - cleaned up header files
+ * Sun Jan 20 10:11:15 MET 2002 herp - added modversion header files
+ * Thu Nov 14 16:34:11 GMT 2002 mh - added PPS functionality
+ * Tue Nov 19 16:36:27 GMT 2002 mh - added SUSPEND/RESUME functionailty
+ * Wed Jul 28 12:55:01 CEST 2004 mh - kernel 2.6 adjustments
+ *
+ * current version: 2.4.0gm4
+ *
+ * (C) 2000,2001,2002,2003,2004 Omnikey AG
+ *
+ * (C) 2005-2006 Harald Welte <laforge@gnumonks.org>
+ * - Adhere to Kernel process/coding-style.rst
+ * - Port to 2.6.13 "new" style PCMCIA
+ * - Check for copy_{from,to}_user return values
+ * - Use nonseekable_open()
+ * - add class interface for udev device creation
+ *
+ * All rights reserved. Licensed under dual BSD/GPL license.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/init.h>
+#include <linux/fs.h>
+#include <linux/delay.h>
+#include <linux/bitrev.h>
+#include <linux/mutex.h>
+#include <linux/uaccess.h>
+#include <linux/io.h>
+
+#include <pcmcia/cistpl.h>
+#include <pcmcia/cisreg.h>
+#include <pcmcia/ciscode.h>
+#include <pcmcia/ds.h>
+
+#include <linux/cm4000_cs.h>
+
+/* #define ATR_CSUM */
+
+#define reader_to_dev(x) (&x->p_dev->dev)
+
+/* n (debug level) is ignored */
+/* additional debug output may be enabled by re-compiling with
+ * CM4000_DEBUG set */
+/* #define CM4000_DEBUG */
+#define DEBUGP(n, rdr, x, args...) do { \
+ dev_dbg(reader_to_dev(rdr), "%s:" x, \
+ __func__ , ## args); \
+ } while (0)
+
+static DEFINE_MUTEX(cmm_mutex);
+
+#define T_1SEC (HZ)
+#define T_10MSEC msecs_to_jiffies(10)
+#define T_20MSEC msecs_to_jiffies(20)
+#define T_40MSEC msecs_to_jiffies(40)
+#define T_50MSEC msecs_to_jiffies(50)
+#define T_100MSEC msecs_to_jiffies(100)
+#define T_500MSEC msecs_to_jiffies(500)
+
+static void cm4000_release(struct pcmcia_device *link);
+
+static int major; /* major number we get from the kernel */
+
+/* note: the first state has to have number 0 always */
+
+#define M_FETCH_ATR 0
+#define M_TIMEOUT_WAIT 1
+#define M_READ_ATR_LEN 2
+#define M_READ_ATR 3
+#define M_ATR_PRESENT 4
+#define M_BAD_CARD 5
+#define M_CARDOFF 6
+
+#define LOCK_IO 0
+#define LOCK_MONITOR 1
+
+#define IS_AUTOPPS_ACT 6
+#define IS_PROCBYTE_PRESENT 7
+#define IS_INVREV 8
+#define IS_ANY_T0 9
+#define IS_ANY_T1 10
+#define IS_ATR_PRESENT 11
+#define IS_ATR_VALID 12
+#define IS_CMM_ABSENT 13
+#define IS_BAD_LENGTH 14
+#define IS_BAD_CSUM 15
+#define IS_BAD_CARD 16
+
+#define REG_FLAGS0(x) (x + 0)
+#define REG_FLAGS1(x) (x + 1)
+#define REG_NUM_BYTES(x) (x + 2)
+#define REG_BUF_ADDR(x) (x + 3)
+#define REG_BUF_DATA(x) (x + 4)
+#define REG_NUM_SEND(x) (x + 5)
+#define REG_BAUDRATE(x) (x + 6)
+#define REG_STOPBITS(x) (x + 7)
+
+struct cm4000_dev {
+ struct pcmcia_device *p_dev;
+
+ unsigned char atr[MAX_ATR];
+ unsigned char rbuf[512];
+ unsigned char sbuf[512];
+
+ wait_queue_head_t devq; /* when removing cardman must not be
+ zeroed! */
+
+ wait_queue_head_t ioq; /* if IO is locked, wait on this Q */
+ wait_queue_head_t atrq; /* wait for ATR valid */
+ wait_queue_head_t readq; /* used by write to wake blk.read */
+
+ /* warning: do not move this struct group.
+ * initialising to zero depends on it - see ZERO_DEV below. */
+ struct_group(init,
+ unsigned char atr_csum;
+ unsigned char atr_len_retry;
+ unsigned short atr_len;
+ unsigned short rlen; /* bytes avail. after write */
+ unsigned short rpos; /* latest read pos. write zeroes */
+ unsigned char procbyte; /* T=0 procedure byte */
+ unsigned char mstate; /* state of card monitor */
+ unsigned char cwarn; /* slow down warning */
+ unsigned char flags0; /* cardman IO-flags 0 */
+ unsigned char flags1; /* cardman IO-flags 1 */
+ unsigned int mdelay; /* variable monitor speeds, in jiffies */
+
+ unsigned int baudv; /* baud value for speed */
+ unsigned char ta1;
+ unsigned char proto; /* T=0, T=1, ... */
+ unsigned long flags; /* lock+flags (MONITOR,IO,ATR) * for concurrent
+ access */
+
+ unsigned char pts[4];
+
+ struct timer_list timer; /* used to keep monitor running */
+ int monitor_running;
+ );
+};
+
+#define ZERO_DEV(dev) memset(&((dev)->init), 0, sizeof((dev)->init))
+
+static struct pcmcia_device *dev_table[CM4000_MAX_DEV];
+static struct class *cmm_class;
+
+/* This table doesn't use spaces after the comma between fields and thus
+ * violates process/coding-style.rst. However, I don't really think wrapping it around will
+ * make it any clearer to read -HW */
+static unsigned char fi_di_table[10][14] = {
+/*FI 00 01 02 03 04 05 06 07 08 09 10 11 12 13 */
+/*DI */
+/* 0 */ {0x11,0x11,0x11,0x11,0x11,0x11,0x11,0x11,0x11,0x11,0x11,0x11,0x11,0x11},
+/* 1 */ {0x01,0x11,0x11,0x11,0x11,0x11,0x11,0x11,0x11,0x91,0x11,0x11,0x11,0x11},
+/* 2 */ {0x02,0x12,0x22,0x32,0x11,0x11,0x11,0x11,0x11,0x92,0xA2,0xB2,0x11,0x11},
+/* 3 */ {0x03,0x13,0x23,0x33,0x43,0x53,0x63,0x11,0x11,0x93,0xA3,0xB3,0xC3,0xD3},
+/* 4 */ {0x04,0x14,0x24,0x34,0x44,0x54,0x64,0x11,0x11,0x94,0xA4,0xB4,0xC4,0xD4},
+/* 5 */ {0x00,0x15,0x25,0x35,0x45,0x55,0x65,0x11,0x11,0x95,0xA5,0xB5,0xC5,0xD5},
+/* 6 */ {0x06,0x16,0x26,0x36,0x46,0x56,0x66,0x11,0x11,0x96,0xA6,0xB6,0xC6,0xD6},
+/* 7 */ {0x11,0x11,0x11,0x11,0x11,0x11,0x11,0x11,0x11,0x11,0x11,0x11,0x11,0x11},
+/* 8 */ {0x08,0x11,0x28,0x38,0x48,0x58,0x68,0x11,0x11,0x98,0xA8,0xB8,0xC8,0xD8},
+/* 9 */ {0x09,0x19,0x29,0x39,0x49,0x59,0x69,0x11,0x11,0x99,0xA9,0xB9,0xC9,0xD9}
+};
+
+#ifndef CM4000_DEBUG
+#define xoutb outb
+#define xinb inb
+#else
+static inline void xoutb(unsigned char val, unsigned short port)
+{
+ pr_debug("outb(val=%.2x,port=%.4x)\n", val, port);
+ outb(val, port);
+}
+static inline unsigned char xinb(unsigned short port)
+{
+ unsigned char val;
+
+ val = inb(port);
+ pr_debug("%.2x=inb(%.4x)\n", val, port);
+
+ return val;
+}
+#endif
+
+static inline unsigned char invert_revert(unsigned char ch)
+{
+ return bitrev8(~ch);
+}
+
+static void str_invert_revert(unsigned char *b, int len)
+{
+ int i;
+
+ for (i = 0; i < len; i++)
+ b[i] = invert_revert(b[i]);
+}
+
+#define ATRLENCK(dev,pos) \
+ if (pos>=dev->atr_len || pos>=MAX_ATR) \
+ goto return_0;
+
+static unsigned int calc_baudv(unsigned char fidi)
+{
+ unsigned int wcrcf, wbrcf, fi_rfu, di_rfu;
+
+ fi_rfu = 372;
+ di_rfu = 1;
+
+ /* FI */
+ switch ((fidi >> 4) & 0x0F) {
+ case 0x00:
+ wcrcf = 372;
+ break;
+ case 0x01:
+ wcrcf = 372;
+ break;
+ case 0x02:
+ wcrcf = 558;
+ break;
+ case 0x03:
+ wcrcf = 744;
+ break;
+ case 0x04:
+ wcrcf = 1116;
+ break;
+ case 0x05:
+ wcrcf = 1488;
+ break;
+ case 0x06:
+ wcrcf = 1860;
+ break;
+ case 0x07:
+ wcrcf = fi_rfu;
+ break;
+ case 0x08:
+ wcrcf = fi_rfu;
+ break;
+ case 0x09:
+ wcrcf = 512;
+ break;
+ case 0x0A:
+ wcrcf = 768;
+ break;
+ case 0x0B:
+ wcrcf = 1024;
+ break;
+ case 0x0C:
+ wcrcf = 1536;
+ break;
+ case 0x0D:
+ wcrcf = 2048;
+ break;
+ default:
+ wcrcf = fi_rfu;
+ break;
+ }
+
+ /* DI */
+ switch (fidi & 0x0F) {
+ case 0x00:
+ wbrcf = di_rfu;
+ break;
+ case 0x01:
+ wbrcf = 1;
+ break;
+ case 0x02:
+ wbrcf = 2;
+ break;
+ case 0x03:
+ wbrcf = 4;
+ break;
+ case 0x04:
+ wbrcf = 8;
+ break;
+ case 0x05:
+ wbrcf = 16;
+ break;
+ case 0x06:
+ wbrcf = 32;
+ break;
+ case 0x07:
+ wbrcf = di_rfu;
+ break;
+ case 0x08:
+ wbrcf = 12;
+ break;
+ case 0x09:
+ wbrcf = 20;
+ break;
+ default:
+ wbrcf = di_rfu;
+ break;
+ }
+
+ return (wcrcf / wbrcf);
+}
+
+static unsigned short io_read_num_rec_bytes(unsigned int iobase,
+ unsigned short *s)
+{
+ unsigned short tmp;
+
+ tmp = *s = 0;
+ do {
+ *s = tmp;
+ tmp = inb(REG_NUM_BYTES(iobase)) |
+ (inb(REG_FLAGS0(iobase)) & 4 ? 0x100 : 0);
+ } while (tmp != *s);
+
+ return *s;
+}
+
+static int parse_atr(struct cm4000_dev *dev)
+{
+ unsigned char any_t1, any_t0;
+ unsigned char ch, ifno;
+ int ix, done;
+
+ DEBUGP(3, dev, "-> parse_atr: dev->atr_len = %i\n", dev->atr_len);
+
+ if (dev->atr_len < 3) {
+ DEBUGP(5, dev, "parse_atr: atr_len < 3\n");
+ return 0;
+ }
+
+ if (dev->atr[0] == 0x3f)
+ set_bit(IS_INVREV, &dev->flags);
+ else
+ clear_bit(IS_INVREV, &dev->flags);
+ ix = 1;
+ ifno = 1;
+ ch = dev->atr[1];
+ dev->proto = 0; /* XXX PROTO */
+ any_t1 = any_t0 = done = 0;
+ dev->ta1 = 0x11; /* defaults to 9600 baud */
+ do {
+ if (ifno == 1 && (ch & 0x10)) {
+ /* read first interface byte and TA1 is present */
+ dev->ta1 = dev->atr[2];
+ DEBUGP(5, dev, "Card says FiDi is 0x%.2x\n", dev->ta1);
+ ifno++;
+ } else if ((ifno == 2) && (ch & 0x10)) { /* TA(2) */
+ dev->ta1 = 0x11;
+ ifno++;
+ }
+
+ DEBUGP(5, dev, "Yi=%.2x\n", ch & 0xf0);
+ ix += ((ch & 0x10) >> 4) /* no of int.face chars */
+ +((ch & 0x20) >> 5)
+ + ((ch & 0x40) >> 6)
+ + ((ch & 0x80) >> 7);
+ /* ATRLENCK(dev,ix); */
+ if (ch & 0x80) { /* TDi */
+ ch = dev->atr[ix];
+ if ((ch & 0x0f)) {
+ any_t1 = 1;
+ DEBUGP(5, dev, "card is capable of T=1\n");
+ } else {
+ any_t0 = 1;
+ DEBUGP(5, dev, "card is capable of T=0\n");
+ }
+ } else
+ done = 1;
+ } while (!done);
+
+ DEBUGP(5, dev, "ix=%d noHist=%d any_t1=%d\n",
+ ix, dev->atr[1] & 15, any_t1);
+ if (ix + 1 + (dev->atr[1] & 0x0f) + any_t1 != dev->atr_len) {
+ DEBUGP(5, dev, "length error\n");
+ return 0;
+ }
+ if (any_t0)
+ set_bit(IS_ANY_T0, &dev->flags);
+
+ if (any_t1) { /* compute csum */
+ dev->atr_csum = 0;
+#ifdef ATR_CSUM
+ for (i = 1; i < dev->atr_len; i++)
+ dev->atr_csum ^= dev->atr[i];
+ if (dev->atr_csum) {
+ set_bit(IS_BAD_CSUM, &dev->flags);
+ DEBUGP(5, dev, "bad checksum\n");
+ goto return_0;
+ }
+#endif
+ if (any_t0 == 0)
+ dev->proto = 1; /* XXX PROTO */
+ set_bit(IS_ANY_T1, &dev->flags);
+ }
+
+ return 1;
+}
+
+struct card_fixup {
+ char atr[12];
+ u_int8_t atr_len;
+ u_int8_t stopbits;
+};
+
+static struct card_fixup card_fixups[] = {
+ { /* ACOS */
+ .atr = { 0x3b, 0xb3, 0x11, 0x00, 0x00, 0x41, 0x01 },
+ .atr_len = 7,
+ .stopbits = 0x03,
+ },
+ { /* Motorola */
+ .atr = {0x3b, 0x76, 0x13, 0x00, 0x00, 0x80, 0x62, 0x07,
+ 0x41, 0x81, 0x81 },
+ .atr_len = 11,
+ .stopbits = 0x04,
+ },
+};
+
+static void set_cardparameter(struct cm4000_dev *dev)
+{
+ int i;
+ unsigned int iobase = dev->p_dev->resource[0]->start;
+ u_int8_t stopbits = 0x02; /* ISO default */
+
+ DEBUGP(3, dev, "-> set_cardparameter\n");
+
+ dev->flags1 = dev->flags1 | (((dev->baudv - 1) & 0x0100) >> 8);
+ xoutb(dev->flags1, REG_FLAGS1(iobase));
+ DEBUGP(5, dev, "flags1 = 0x%02x\n", dev->flags1);
+
+ /* set baudrate */
+ xoutb((unsigned char)((dev->baudv - 1) & 0xFF), REG_BAUDRATE(iobase));
+
+ DEBUGP(5, dev, "baudv = %i -> write 0x%02x\n", dev->baudv,
+ ((dev->baudv - 1) & 0xFF));
+
+ /* set stopbits */
+ for (i = 0; i < ARRAY_SIZE(card_fixups); i++) {
+ if (!memcmp(dev->atr, card_fixups[i].atr,
+ card_fixups[i].atr_len))
+ stopbits = card_fixups[i].stopbits;
+ }
+ xoutb(stopbits, REG_STOPBITS(iobase));
+
+ DEBUGP(3, dev, "<- set_cardparameter\n");
+}
+
+static int set_protocol(struct cm4000_dev *dev, struct ptsreq *ptsreq)
+{
+
+ unsigned long tmp, i;
+ unsigned short num_bytes_read;
+ unsigned char pts_reply[4];
+ ssize_t rc;
+ unsigned int iobase = dev->p_dev->resource[0]->start;
+
+ rc = 0;
+
+ DEBUGP(3, dev, "-> set_protocol\n");
+ DEBUGP(5, dev, "ptsreq->Protocol = 0x%.8x, ptsreq->Flags=0x%.8x, "
+ "ptsreq->pts1=0x%.2x, ptsreq->pts2=0x%.2x, "
+ "ptsreq->pts3=0x%.2x\n", (unsigned int)ptsreq->protocol,
+ (unsigned int)ptsreq->flags, ptsreq->pts1, ptsreq->pts2,
+ ptsreq->pts3);
+
+ /* Fill PTS structure */
+ dev->pts[0] = 0xff;
+ dev->pts[1] = 0x00;
+ tmp = ptsreq->protocol;
+ while ((tmp = (tmp >> 1)) > 0)
+ dev->pts[1]++;
+ dev->proto = dev->pts[1]; /* Set new protocol */
+ dev->pts[1] = (0x01 << 4) | (dev->pts[1]);
+
+ /* Correct Fi/Di according to CM4000 Fi/Di table */
+ DEBUGP(5, dev, "Ta(1) from ATR is 0x%.2x\n", dev->ta1);
+ /* set Fi/Di according to ATR TA(1) */
+ dev->pts[2] = fi_di_table[dev->ta1 & 0x0F][(dev->ta1 >> 4) & 0x0F];
+
+ /* Calculate PCK character */
+ dev->pts[3] = dev->pts[0] ^ dev->pts[1] ^ dev->pts[2];
+
+ DEBUGP(5, dev, "pts0=%.2x, pts1=%.2x, pts2=%.2x, pts3=%.2x\n",
+ dev->pts[0], dev->pts[1], dev->pts[2], dev->pts[3]);
+
+ /* check card convention */
+ if (test_bit(IS_INVREV, &dev->flags))
+ str_invert_revert(dev->pts, 4);
+
+ /* reset SM */
+ xoutb(0x80, REG_FLAGS0(iobase));
+
+ /* Enable access to the message buffer */
+ DEBUGP(5, dev, "Enable access to the messages buffer\n");
+ dev->flags1 = 0x20 /* T_Active */
+ | (test_bit(IS_INVREV, &dev->flags) ? 0x02 : 0x00) /* inv parity */
+ | ((dev->baudv >> 8) & 0x01); /* MSB-baud */
+ xoutb(dev->flags1, REG_FLAGS1(iobase));
+
+ DEBUGP(5, dev, "Enable message buffer -> flags1 = 0x%.2x\n",
+ dev->flags1);
+
+ /* write challenge to the buffer */
+ DEBUGP(5, dev, "Write challenge to buffer: ");
+ for (i = 0; i < 4; i++) {
+ xoutb(i, REG_BUF_ADDR(iobase));
+ xoutb(dev->pts[i], REG_BUF_DATA(iobase)); /* buf data */
+#ifdef CM4000_DEBUG
+ pr_debug("0x%.2x ", dev->pts[i]);
+ }
+ pr_debug("\n");
+#else
+ }
+#endif
+
+ /* set number of bytes to write */
+ DEBUGP(5, dev, "Set number of bytes to write\n");
+ xoutb(0x04, REG_NUM_SEND(iobase));
+
+ /* Trigger CARDMAN CONTROLLER */
+ xoutb(0x50, REG_FLAGS0(iobase));
+
+ /* Monitor progress */
+ /* wait for xmit done */
+ DEBUGP(5, dev, "Waiting for NumRecBytes getting valid\n");
+
+ for (i = 0; i < 100; i++) {
+ if (inb(REG_FLAGS0(iobase)) & 0x08) {
+ DEBUGP(5, dev, "NumRecBytes is valid\n");
+ break;
+ }
+ /* can not sleep as this is in atomic context */
+ mdelay(10);
+ }
+ if (i == 100) {
+ DEBUGP(5, dev, "Timeout waiting for NumRecBytes getting "
+ "valid\n");
+ rc = -EIO;
+ goto exit_setprotocol;
+ }
+
+ DEBUGP(5, dev, "Reading NumRecBytes\n");
+ for (i = 0; i < 100; i++) {
+ io_read_num_rec_bytes(iobase, &num_bytes_read);
+ if (num_bytes_read >= 4) {
+ DEBUGP(2, dev, "NumRecBytes = %i\n", num_bytes_read);
+ if (num_bytes_read > 4) {
+ rc = -EIO;
+ goto exit_setprotocol;
+ }
+ break;
+ }
+ /* can not sleep as this is in atomic context */
+ mdelay(10);
+ }
+
+ /* check whether it is a short PTS reply? */
+ if (num_bytes_read == 3)
+ i = 0;
+
+ if (i == 100) {
+ DEBUGP(5, dev, "Timeout reading num_bytes_read\n");
+ rc = -EIO;
+ goto exit_setprotocol;
+ }
+
+ DEBUGP(5, dev, "Reset the CARDMAN CONTROLLER\n");
+ xoutb(0x80, REG_FLAGS0(iobase));
+
+ /* Read PPS reply */
+ DEBUGP(5, dev, "Read PPS reply\n");
+ for (i = 0; i < num_bytes_read; i++) {
+ xoutb(i, REG_BUF_ADDR(iobase));
+ pts_reply[i] = inb(REG_BUF_DATA(iobase));
+ }
+
+#ifdef CM4000_DEBUG
+ DEBUGP(2, dev, "PTSreply: ");
+ for (i = 0; i < num_bytes_read; i++) {
+ pr_debug("0x%.2x ", pts_reply[i]);
+ }
+ pr_debug("\n");
+#endif /* CM4000_DEBUG */
+
+ DEBUGP(5, dev, "Clear Tactive in Flags1\n");
+ xoutb(0x20, REG_FLAGS1(iobase));
+
+ /* Compare ptsreq and ptsreply */
+ if ((dev->pts[0] == pts_reply[0]) &&
+ (dev->pts[1] == pts_reply[1]) &&
+ (dev->pts[2] == pts_reply[2]) && (dev->pts[3] == pts_reply[3])) {
+ /* setcardparameter according to PPS */
+ dev->baudv = calc_baudv(dev->pts[2]);
+ set_cardparameter(dev);
+ } else if ((dev->pts[0] == pts_reply[0]) &&
+ ((dev->pts[1] & 0xef) == pts_reply[1]) &&
+ ((pts_reply[0] ^ pts_reply[1]) == pts_reply[2])) {
+ /* short PTS reply, set card parameter to default values */
+ dev->baudv = calc_baudv(0x11);
+ set_cardparameter(dev);
+ } else
+ rc = -EIO;
+
+exit_setprotocol:
+ DEBUGP(3, dev, "<- set_protocol\n");
+ return rc;
+}
+
+static int io_detect_cm4000(unsigned int iobase, struct cm4000_dev *dev)
+{
+
+ /* note: statemachine is assumed to be reset */
+ if (inb(REG_FLAGS0(iobase)) & 8) {
+ clear_bit(IS_ATR_VALID, &dev->flags);
+ set_bit(IS_CMM_ABSENT, &dev->flags);
+ return 0; /* detect CMM = 1 -> failure */
+ }
+ /* xoutb(0x40, REG_FLAGS1(iobase)); detectCMM */
+ xoutb(dev->flags1 | 0x40, REG_FLAGS1(iobase));
+ if ((inb(REG_FLAGS0(iobase)) & 8) == 0) {
+ clear_bit(IS_ATR_VALID, &dev->flags);
+ set_bit(IS_CMM_ABSENT, &dev->flags);
+ return 0; /* detect CMM=0 -> failure */
+ }
+ /* clear detectCMM again by restoring original flags1 */
+ xoutb(dev->flags1, REG_FLAGS1(iobase));
+ return 1;
+}
+
+static void terminate_monitor(struct cm4000_dev *dev)
+{
+
+ /* tell the monitor to stop and wait until
+ * it terminates.
+ */
+ DEBUGP(3, dev, "-> terminate_monitor\n");
+ wait_event_interruptible(dev->devq,
+ test_and_set_bit(LOCK_MONITOR,
+ (void *)&dev->flags));
+
+ /* now, LOCK_MONITOR has been set.
+ * allow a last cycle in the monitor.
+ * the monitor will indicate that it has
+ * finished by clearing this bit.
+ */
+ DEBUGP(5, dev, "Now allow last cycle of monitor!\n");
+ while (test_bit(LOCK_MONITOR, (void *)&dev->flags))
+ msleep(25);
+
+ DEBUGP(5, dev, "Delete timer\n");
+ del_timer_sync(&dev->timer);
+#ifdef CM4000_DEBUG
+ dev->monitor_running = 0;
+#endif
+
+ DEBUGP(3, dev, "<- terminate_monitor\n");
+}
+
+/*
+ * monitor the card every 50msec. as a side-effect, retrieve the
+ * atr once a card is inserted. another side-effect of retrieving the
+ * atr is that the card will be powered on, so there is no need to
+ * power on the card explicitly from the application: the driver
+ * is already doing that for you.
+ */
+
+static void monitor_card(struct timer_list *t)
+{
+ struct cm4000_dev *dev = from_timer(dev, t, timer);
+ unsigned int iobase = dev->p_dev->resource[0]->start;
+ unsigned short s;
+ struct ptsreq ptsreq;
+ int i, atrc;
+
+ DEBUGP(7, dev, "-> monitor_card\n");
+
+ /* if someone has set the lock for us: we're done! */
+ if (test_and_set_bit(LOCK_MONITOR, &dev->flags)) {
+ DEBUGP(4, dev, "About to stop monitor\n");
+ /* no */
+ dev->rlen =
+ dev->rpos =
+ dev->atr_csum = dev->atr_len_retry = dev->cwarn = 0;
+ dev->mstate = M_FETCH_ATR;
+ clear_bit(LOCK_MONITOR, &dev->flags);
+ /* close et al. are sleeping on devq, so wake it */
+ wake_up_interruptible(&dev->devq);
+ DEBUGP(2, dev, "<- monitor_card (we are done now)\n");
+ return;
+ }
+
+ /* try to lock io: if it is already locked, just add another timer */
+ if (test_and_set_bit(LOCK_IO, (void *)&dev->flags)) {
+ DEBUGP(4, dev, "Couldn't get IO lock\n");
+ goto return_with_timer;
+ }
+
+ /* is a card/a reader inserted at all ? */
+ dev->flags0 = xinb(REG_FLAGS0(iobase));
+ DEBUGP(7, dev, "dev->flags0 = 0x%2x\n", dev->flags0);
+ DEBUGP(7, dev, "smartcard present: %s\n",
+ dev->flags0 & 1 ? "yes" : "no");
+ DEBUGP(7, dev, "cardman present: %s\n",
+ dev->flags0 == 0xff ? "no" : "yes");
+
+ if ((dev->flags0 & 1) == 0 /* no smartcard inserted */
+ || dev->flags0 == 0xff) { /* no cardman inserted */
+ /* no */
+ dev->rlen =
+ dev->rpos =
+ dev->atr_csum = dev->atr_len_retry = dev->cwarn = 0;
+ dev->mstate = M_FETCH_ATR;
+
+ dev->flags &= 0x000000ff; /* only keep IO and MONITOR locks */
+
+ if (dev->flags0 == 0xff) {
+ DEBUGP(4, dev, "set IS_CMM_ABSENT bit\n");
+ set_bit(IS_CMM_ABSENT, &dev->flags);
+ } else if (test_bit(IS_CMM_ABSENT, &dev->flags)) {
+ DEBUGP(4, dev, "clear IS_CMM_ABSENT bit "
+ "(card is removed)\n");
+ clear_bit(IS_CMM_ABSENT, &dev->flags);
+ }
+
+ goto release_io;
+ } else if ((dev->flags0 & 1) && test_bit(IS_CMM_ABSENT, &dev->flags)) {
+ /* cardman and card present but cardman was absent before
+ * (after suspend with inserted card) */
+ DEBUGP(4, dev, "clear IS_CMM_ABSENT bit (card is inserted)\n");
+ clear_bit(IS_CMM_ABSENT, &dev->flags);
+ }
+
+ if (test_bit(IS_ATR_VALID, &dev->flags) == 1) {
+ DEBUGP(7, dev, "believe ATR is already valid (do nothing)\n");
+ goto release_io;
+ }
+
+ switch (dev->mstate) {
+ case M_CARDOFF: {
+ unsigned char flags0;
+
+ DEBUGP(4, dev, "M_CARDOFF\n");
+ flags0 = inb(REG_FLAGS0(iobase));
+ if (flags0 & 0x02) {
+ /* wait until Flags0 indicate power is off */
+ dev->mdelay = T_10MSEC;
+ } else {
+ /* Flags0 indicate power off and no card inserted now;
+ * Reset CARDMAN CONTROLLER */
+ xoutb(0x80, REG_FLAGS0(iobase));
+
+ /* prepare for fetching ATR again: after card off ATR
+ * is read again automatically */
+ dev->rlen =
+ dev->rpos =
+ dev->atr_csum =
+ dev->atr_len_retry = dev->cwarn = 0;
+ dev->mstate = M_FETCH_ATR;
+
+ /* minimal gap between CARDOFF and read ATR is 50msec */
+ dev->mdelay = T_50MSEC;
+ }
+ break;
+ }
+ case M_FETCH_ATR:
+ DEBUGP(4, dev, "M_FETCH_ATR\n");
+ xoutb(0x80, REG_FLAGS0(iobase));
+ DEBUGP(4, dev, "Reset BAUDV to 9600\n");
+ dev->baudv = 0x173; /* 9600 */
+ xoutb(0x02, REG_STOPBITS(iobase)); /* stopbits=2 */
+ xoutb(0x73, REG_BAUDRATE(iobase)); /* baud value */
+ xoutb(0x21, REG_FLAGS1(iobase)); /* T_Active=1, baud
+ value */
+ /* warm start vs. power on: */
+ xoutb(dev->flags0 & 2 ? 0x46 : 0x44, REG_FLAGS0(iobase));
+ dev->mdelay = T_40MSEC;
+ dev->mstate = M_TIMEOUT_WAIT;
+ break;
+ case M_TIMEOUT_WAIT:
+ DEBUGP(4, dev, "M_TIMEOUT_WAIT\n");
+ /* numRecBytes */
+ io_read_num_rec_bytes(iobase, &dev->atr_len);
+ dev->mdelay = T_10MSEC;
+ dev->mstate = M_READ_ATR_LEN;
+ break;
+ case M_READ_ATR_LEN:
+ DEBUGP(4, dev, "M_READ_ATR_LEN\n");
+ /* infinite loop possible, since there is no timeout */
+
+#define MAX_ATR_LEN_RETRY 100
+
+ if (dev->atr_len == io_read_num_rec_bytes(iobase, &s)) {
+ if (dev->atr_len_retry++ >= MAX_ATR_LEN_RETRY) { /* + XX msec */
+ dev->mdelay = T_10MSEC;
+ dev->mstate = M_READ_ATR;
+ }
+ } else {
+ dev->atr_len = s;
+ dev->atr_len_retry = 0; /* set new timeout */
+ }
+
+ DEBUGP(4, dev, "Current ATR_LEN = %i\n", dev->atr_len);
+ break;
+ case M_READ_ATR:
+ DEBUGP(4, dev, "M_READ_ATR\n");
+ xoutb(0x80, REG_FLAGS0(iobase)); /* reset SM */
+ for (i = 0; i < dev->atr_len; i++) {
+ xoutb(i, REG_BUF_ADDR(iobase));
+ dev->atr[i] = inb(REG_BUF_DATA(iobase));
+ }
+ /* Deactivate T_Active flags */
+ DEBUGP(4, dev, "Deactivate T_Active flags\n");
+ dev->flags1 = 0x01;
+ xoutb(dev->flags1, REG_FLAGS1(iobase));
+
+ /* atr is present (which doesn't mean it's valid) */
+ set_bit(IS_ATR_PRESENT, &dev->flags);
+ if (dev->atr[0] == 0x03)
+ str_invert_revert(dev->atr, dev->atr_len);
+ atrc = parse_atr(dev);
+ if (atrc == 0) { /* atr invalid */
+ dev->mdelay = 0;
+ dev->mstate = M_BAD_CARD;
+ } else {
+ dev->mdelay = T_50MSEC;
+ dev->mstate = M_ATR_PRESENT;
+ set_bit(IS_ATR_VALID, &dev->flags);
+ }
+
+ if (test_bit(IS_ATR_VALID, &dev->flags) == 1) {
+ DEBUGP(4, dev, "monitor_card: ATR valid\n");
+ /* if ta1 == 0x11, no PPS necessary (default values) */
+ /* do not do PPS with multi protocol cards */
+ if ((test_bit(IS_AUTOPPS_ACT, &dev->flags) == 0) &&
+ (dev->ta1 != 0x11) &&
+ !(test_bit(IS_ANY_T0, &dev->flags) &&
+ test_bit(IS_ANY_T1, &dev->flags))) {
+ DEBUGP(4, dev, "Perform AUTOPPS\n");
+ set_bit(IS_AUTOPPS_ACT, &dev->flags);
+ ptsreq.protocol = (0x01 << dev->proto);
+ ptsreq.flags = 0x01;
+ ptsreq.pts1 = 0x00;
+ ptsreq.pts2 = 0x00;
+ ptsreq.pts3 = 0x00;
+ if (set_protocol(dev, &ptsreq) == 0) {
+ DEBUGP(4, dev, "AUTOPPS ret SUCC\n");
+ clear_bit(IS_AUTOPPS_ACT, &dev->flags);
+ wake_up_interruptible(&dev->atrq);
+ } else {
+ DEBUGP(4, dev, "AUTOPPS failed: "
+ "repower using defaults\n");
+ /* prepare for repowering */
+ clear_bit(IS_ATR_PRESENT, &dev->flags);
+ clear_bit(IS_ATR_VALID, &dev->flags);
+ dev->rlen =
+ dev->rpos =
+ dev->atr_csum =
+ dev->atr_len_retry = dev->cwarn = 0;
+ dev->mstate = M_FETCH_ATR;
+
+ dev->mdelay = T_50MSEC;
+ }
+ } else {
+ /* for cards which use slightly different
+ * params (extra guard time) */
+ set_cardparameter(dev);
+ if (test_bit(IS_AUTOPPS_ACT, &dev->flags) == 1)
+ DEBUGP(4, dev, "AUTOPPS already active "
+ "2nd try:use default values\n");
+ if (dev->ta1 == 0x11)
+ DEBUGP(4, dev, "No AUTOPPS necessary "
+ "TA(1)==0x11\n");
+ if (test_bit(IS_ANY_T0, &dev->flags)
+ && test_bit(IS_ANY_T1, &dev->flags))
+ DEBUGP(4, dev, "Do NOT perform AUTOPPS "
+ "with multiprotocol cards\n");
+ clear_bit(IS_AUTOPPS_ACT, &dev->flags);
+ wake_up_interruptible(&dev->atrq);
+ }
+ } else {
+ DEBUGP(4, dev, "ATR invalid\n");
+ wake_up_interruptible(&dev->atrq);
+ }
+ break;
+ case M_BAD_CARD:
+ DEBUGP(4, dev, "M_BAD_CARD\n");
+ /* slow down warning, but prompt immediately after insertion */
+ if (dev->cwarn == 0 || dev->cwarn == 10) {
+ set_bit(IS_BAD_CARD, &dev->flags);
+ dev_warn(&dev->p_dev->dev, MODULE_NAME ": ");
+ if (test_bit(IS_BAD_CSUM, &dev->flags)) {
+ DEBUGP(4, dev, "ATR checksum (0x%.2x, should "
+ "be zero) failed\n", dev->atr_csum);
+ }
+#ifdef CM4000_DEBUG
+ else if (test_bit(IS_BAD_LENGTH, &dev->flags)) {
+ DEBUGP(4, dev, "ATR length error\n");
+ } else {
+ DEBUGP(4, dev, "card damaged or wrong way "
+ "inserted\n");
+ }
+#endif
+ dev->cwarn = 0;
+ wake_up_interruptible(&dev->atrq); /* wake open */
+ }
+ dev->cwarn++;
+ dev->mdelay = T_100MSEC;
+ dev->mstate = M_FETCH_ATR;
+ break;
+ default:
+ DEBUGP(7, dev, "Unknown action\n");
+ break; /* nothing */
+ }
+
+release_io:
+ DEBUGP(7, dev, "release_io\n");
+ clear_bit(LOCK_IO, &dev->flags);
+ wake_up_interruptible(&dev->ioq); /* whoever needs IO */
+
+return_with_timer:
+ DEBUGP(7, dev, "<- monitor_card (returns with timer)\n");
+ mod_timer(&dev->timer, jiffies + dev->mdelay);
+ clear_bit(LOCK_MONITOR, &dev->flags);
+}
+
+/* Interface to userland (file_operations) */
+
+static ssize_t cmm_read(struct file *filp, __user char *buf, size_t count,
+ loff_t *ppos)
+{
+ struct cm4000_dev *dev = filp->private_data;
+ unsigned int iobase = dev->p_dev->resource[0]->start;
+ ssize_t rc;
+ int i, j, k;
+
+ DEBUGP(2, dev, "-> cmm_read(%s,%d)\n", current->comm, current->pid);
+
+ if (count == 0) /* according to manpage */
+ return 0;
+
+ if (!pcmcia_dev_present(dev->p_dev) || /* device removed */
+ test_bit(IS_CMM_ABSENT, &dev->flags))
+ return -ENODEV;
+
+ if (test_bit(IS_BAD_CSUM, &dev->flags))
+ return -EIO;
+
+ /* also see the note about this in cmm_write */
+ if (wait_event_interruptible
+ (dev->atrq,
+ ((filp->f_flags & O_NONBLOCK)
+ || (test_bit(IS_ATR_PRESENT, (void *)&dev->flags) != 0)))) {
+ if (filp->f_flags & O_NONBLOCK)
+ return -EAGAIN;
+ return -ERESTARTSYS;
+ }
+
+ if (test_bit(IS_ATR_VALID, &dev->flags) == 0)
+ return -EIO;
+
+ /* this one implements blocking IO */
+ if (wait_event_interruptible
+ (dev->readq,
+ ((filp->f_flags & O_NONBLOCK) || (dev->rpos < dev->rlen)))) {
+ if (filp->f_flags & O_NONBLOCK)
+ return -EAGAIN;
+ return -ERESTARTSYS;
+ }
+
+ /* lock io */
+ if (wait_event_interruptible
+ (dev->ioq,
+ ((filp->f_flags & O_NONBLOCK)
+ || (test_and_set_bit(LOCK_IO, (void *)&dev->flags) == 0)))) {
+ if (filp->f_flags & O_NONBLOCK)
+ return -EAGAIN;
+ return -ERESTARTSYS;
+ }
+
+ rc = 0;
+ dev->flags0 = inb(REG_FLAGS0(iobase));
+ if ((dev->flags0 & 1) == 0 /* no smartcard inserted */
+ || dev->flags0 == 0xff) { /* no cardman inserted */
+ clear_bit(IS_ATR_VALID, &dev->flags);
+ if (dev->flags0 & 1) {
+ set_bit(IS_CMM_ABSENT, &dev->flags);
+ rc = -ENODEV;
+ } else {
+ rc = -EIO;
+ }
+ goto release_io;
+ }
+
+ DEBUGP(4, dev, "begin read answer\n");
+ j = min(count, (size_t)(dev->rlen - dev->rpos));
+ k = dev->rpos;
+ if (k + j > 255)
+ j = 256 - k;
+ DEBUGP(4, dev, "read1 j=%d\n", j);
+ for (i = 0; i < j; i++) {
+ xoutb(k++, REG_BUF_ADDR(iobase));
+ dev->rbuf[i] = xinb(REG_BUF_DATA(iobase));
+ }
+ j = min(count, (size_t)(dev->rlen - dev->rpos));
+ if (k + j > 255) {
+ DEBUGP(4, dev, "read2 j=%d\n", j);
+ dev->flags1 |= 0x10; /* MSB buf addr set */
+ xoutb(dev->flags1, REG_FLAGS1(iobase));
+ for (; i < j; i++) {
+ xoutb(k++, REG_BUF_ADDR(iobase));
+ dev->rbuf[i] = xinb(REG_BUF_DATA(iobase));
+ }
+ }
+
+ if (dev->proto == 0 && count > dev->rlen - dev->rpos && i) {
+ DEBUGP(4, dev, "T=0 and count > buffer\n");
+ dev->rbuf[i] = dev->rbuf[i - 1];
+ dev->rbuf[i - 1] = dev->procbyte;
+ j++;
+ }
+ count = j;
+
+ dev->rpos = dev->rlen + 1;
+
+ /* Clear T1Active */
+ DEBUGP(4, dev, "Clear T1Active\n");
+ dev->flags1 &= 0xdf;
+ xoutb(dev->flags1, REG_FLAGS1(iobase));
+
+ xoutb(0, REG_FLAGS1(iobase)); /* clear detectCMM */
+ /* last check before exit */
+ if (!io_detect_cm4000(iobase, dev)) {
+ rc = -ENODEV;
+ goto release_io;
+ }
+
+ if (test_bit(IS_INVREV, &dev->flags) && count > 0)
+ str_invert_revert(dev->rbuf, count);
+
+ if (copy_to_user(buf, dev->rbuf, count))
+ rc = -EFAULT;
+
+release_io:
+ clear_bit(LOCK_IO, &dev->flags);
+ wake_up_interruptible(&dev->ioq);
+
+ DEBUGP(2, dev, "<- cmm_read returns: rc = %zi\n",
+ (rc < 0 ? rc : count));
+ return rc < 0 ? rc : count;
+}
+
+static ssize_t cmm_write(struct file *filp, const char __user *buf,
+ size_t count, loff_t *ppos)
+{
+ struct cm4000_dev *dev = filp->private_data;
+ unsigned int iobase = dev->p_dev->resource[0]->start;
+ unsigned short s;
+ unsigned char infolen;
+ unsigned char sendT0;
+ unsigned short nsend;
+ unsigned short nr;
+ ssize_t rc;
+ int i;
+
+ DEBUGP(2, dev, "-> cmm_write(%s,%d)\n", current->comm, current->pid);
+
+ if (count == 0) /* according to manpage */
+ return 0;
+
+ if (dev->proto == 0 && count < 4) {
+ /* T0 must have at least 4 bytes */
+ DEBUGP(4, dev, "T0 short write\n");
+ return -EIO;
+ }
+
+ nr = count & 0x1ff; /* max bytes to write */
+
+ sendT0 = dev->proto ? 0 : nr > 5 ? 0x08 : 0;
+
+ if (!pcmcia_dev_present(dev->p_dev) || /* device removed */
+ test_bit(IS_CMM_ABSENT, &dev->flags))
+ return -ENODEV;
+
+ if (test_bit(IS_BAD_CSUM, &dev->flags)) {
+ DEBUGP(4, dev, "bad csum\n");
+ return -EIO;
+ }
+
+ /*
+ * wait for atr to become valid.
+ * note: it is important to lock this code. if we dont, the monitor
+ * could be run between test_bit and the call to sleep on the
+ * atr-queue. if *then* the monitor detects atr valid, it will wake up
+ * any process on the atr-queue, *but* since we have been interrupted,
+ * we do not yet sleep on this queue. this would result in a missed
+ * wake_up and the calling process would sleep forever (until
+ * interrupted). also, do *not* restore_flags before sleep_on, because
+ * this could result in the same situation!
+ */
+ if (wait_event_interruptible
+ (dev->atrq,
+ ((filp->f_flags & O_NONBLOCK)
+ || (test_bit(IS_ATR_PRESENT, (void *)&dev->flags) != 0)))) {
+ if (filp->f_flags & O_NONBLOCK)
+ return -EAGAIN;
+ return -ERESTARTSYS;
+ }
+
+ if (test_bit(IS_ATR_VALID, &dev->flags) == 0) { /* invalid atr */
+ DEBUGP(4, dev, "invalid ATR\n");
+ return -EIO;
+ }
+
+ /* lock io */
+ if (wait_event_interruptible
+ (dev->ioq,
+ ((filp->f_flags & O_NONBLOCK)
+ || (test_and_set_bit(LOCK_IO, (void *)&dev->flags) == 0)))) {
+ if (filp->f_flags & O_NONBLOCK)
+ return -EAGAIN;
+ return -ERESTARTSYS;
+ }
+
+ if (copy_from_user(dev->sbuf, buf, ((count > 512) ? 512 : count)))
+ return -EFAULT;
+
+ rc = 0;
+ dev->flags0 = inb(REG_FLAGS0(iobase));
+ if ((dev->flags0 & 1) == 0 /* no smartcard inserted */
+ || dev->flags0 == 0xff) { /* no cardman inserted */
+ clear_bit(IS_ATR_VALID, &dev->flags);
+ if (dev->flags0 & 1) {
+ set_bit(IS_CMM_ABSENT, &dev->flags);
+ rc = -ENODEV;
+ } else {
+ DEBUGP(4, dev, "IO error\n");
+ rc = -EIO;
+ }
+ goto release_io;
+ }
+
+ xoutb(0x80, REG_FLAGS0(iobase)); /* reset SM */
+
+ if (!io_detect_cm4000(iobase, dev)) {
+ rc = -ENODEV;
+ goto release_io;
+ }
+
+ /* reflect T=0 send/read mode in flags1 */
+ dev->flags1 |= (sendT0);
+
+ set_cardparameter(dev);
+
+ /* dummy read, reset flag procedure received */
+ inb(REG_FLAGS1(iobase));
+
+ dev->flags1 = 0x20 /* T_Active */
+ | (sendT0)
+ | (test_bit(IS_INVREV, &dev->flags) ? 2 : 0)/* inverse parity */
+ | (((dev->baudv - 1) & 0x0100) >> 8); /* MSB-Baud */
+ DEBUGP(1, dev, "set dev->flags1 = 0x%.2x\n", dev->flags1);
+ xoutb(dev->flags1, REG_FLAGS1(iobase));
+
+ /* xmit data */
+ DEBUGP(4, dev, "Xmit data\n");
+ for (i = 0; i < nr; i++) {
+ if (i >= 256) {
+ dev->flags1 = 0x20 /* T_Active */
+ | (sendT0) /* SendT0 */
+ /* inverse parity: */
+ | (test_bit(IS_INVREV, &dev->flags) ? 2 : 0)
+ | (((dev->baudv - 1) & 0x0100) >> 8) /* MSB-Baud */
+ | 0x10; /* set address high */
+ DEBUGP(4, dev, "dev->flags = 0x%.2x - set address "
+ "high\n", dev->flags1);
+ xoutb(dev->flags1, REG_FLAGS1(iobase));
+ }
+ if (test_bit(IS_INVREV, &dev->flags)) {
+ DEBUGP(4, dev, "Apply inverse convention for 0x%.2x "
+ "-> 0x%.2x\n", (unsigned char)dev->sbuf[i],
+ invert_revert(dev->sbuf[i]));
+ xoutb(i, REG_BUF_ADDR(iobase));
+ xoutb(invert_revert(dev->sbuf[i]),
+ REG_BUF_DATA(iobase));
+ } else {
+ xoutb(i, REG_BUF_ADDR(iobase));
+ xoutb(dev->sbuf[i], REG_BUF_DATA(iobase));
+ }
+ }
+ DEBUGP(4, dev, "Xmit done\n");
+
+ if (dev->proto == 0) {
+ /* T=0 proto: 0 byte reply */
+ if (nr == 4) {
+ DEBUGP(4, dev, "T=0 assumes 0 byte reply\n");
+ xoutb(i, REG_BUF_ADDR(iobase));
+ if (test_bit(IS_INVREV, &dev->flags))
+ xoutb(0xff, REG_BUF_DATA(iobase));
+ else
+ xoutb(0x00, REG_BUF_DATA(iobase));
+ }
+
+ /* numSendBytes */
+ if (sendT0)
+ nsend = nr;
+ else {
+ if (nr == 4)
+ nsend = 5;
+ else {
+ nsend = 5 + (unsigned char)dev->sbuf[4];
+ if (dev->sbuf[4] == 0)
+ nsend += 0x100;
+ }
+ }
+ } else
+ nsend = nr;
+
+ /* T0: output procedure byte */
+ if (test_bit(IS_INVREV, &dev->flags)) {
+ DEBUGP(4, dev, "T=0 set Procedure byte (inverse-reverse) "
+ "0x%.2x\n", invert_revert(dev->sbuf[1]));
+ xoutb(invert_revert(dev->sbuf[1]), REG_NUM_BYTES(iobase));
+ } else {
+ DEBUGP(4, dev, "T=0 set Procedure byte 0x%.2x\n", dev->sbuf[1]);
+ xoutb(dev->sbuf[1], REG_NUM_BYTES(iobase));
+ }
+
+ DEBUGP(1, dev, "set NumSendBytes = 0x%.2x\n",
+ (unsigned char)(nsend & 0xff));
+ xoutb((unsigned char)(nsend & 0xff), REG_NUM_SEND(iobase));
+
+ DEBUGP(1, dev, "Trigger CARDMAN CONTROLLER (0x%.2x)\n",
+ 0x40 /* SM_Active */
+ | (dev->flags0 & 2 ? 0 : 4) /* power on if needed */
+ |(dev->proto ? 0x10 : 0x08) /* T=1/T=0 */
+ |(nsend & 0x100) >> 8 /* MSB numSendBytes */ );
+ xoutb(0x40 /* SM_Active */
+ | (dev->flags0 & 2 ? 0 : 4) /* power on if needed */
+ |(dev->proto ? 0x10 : 0x08) /* T=1/T=0 */
+ |(nsend & 0x100) >> 8, /* MSB numSendBytes */
+ REG_FLAGS0(iobase));
+
+ /* wait for xmit done */
+ if (dev->proto == 1) {
+ DEBUGP(4, dev, "Wait for xmit done\n");
+ for (i = 0; i < 1000; i++) {
+ if (inb(REG_FLAGS0(iobase)) & 0x08)
+ break;
+ msleep_interruptible(10);
+ }
+ if (i == 1000) {
+ DEBUGP(4, dev, "timeout waiting for xmit done\n");
+ rc = -EIO;
+ goto release_io;
+ }
+ }
+
+ /* T=1: wait for infoLen */
+
+ infolen = 0;
+ if (dev->proto) {
+ /* wait until infoLen is valid */
+ for (i = 0; i < 6000; i++) { /* max waiting time of 1 min */
+ io_read_num_rec_bytes(iobase, &s);
+ if (s >= 3) {
+ infolen = inb(REG_FLAGS1(iobase));
+ DEBUGP(4, dev, "infolen=%d\n", infolen);
+ break;
+ }
+ msleep_interruptible(10);
+ }
+ if (i == 6000) {
+ DEBUGP(4, dev, "timeout waiting for infoLen\n");
+ rc = -EIO;
+ goto release_io;
+ }
+ } else
+ clear_bit(IS_PROCBYTE_PRESENT, &dev->flags);
+
+ /* numRecBytes | bit9 of numRecytes */
+ io_read_num_rec_bytes(iobase, &dev->rlen);
+ for (i = 0; i < 600; i++) { /* max waiting time of 2 sec */
+ if (dev->proto) {
+ if (dev->rlen >= infolen + 4)
+ break;
+ }
+ msleep_interruptible(10);
+ /* numRecBytes | bit9 of numRecytes */
+ io_read_num_rec_bytes(iobase, &s);
+ if (s > dev->rlen) {
+ DEBUGP(1, dev, "NumRecBytes inc (reset timeout)\n");
+ i = 0; /* reset timeout */
+ dev->rlen = s;
+ }
+ /* T=0: we are done when numRecBytes doesn't
+ * increment any more and NoProcedureByte
+ * is set and numRecBytes == bytes sent + 6
+ * (header bytes + data + 1 for sw2)
+ * except when the card replies an error
+ * which means, no data will be sent back.
+ */
+ else if (dev->proto == 0) {
+ if ((inb(REG_BUF_ADDR(iobase)) & 0x80)) {
+ /* no procedure byte received since last read */
+ DEBUGP(1, dev, "NoProcedure byte set\n");
+ /* i=0; */
+ } else {
+ /* procedure byte received since last read */
+ DEBUGP(1, dev, "NoProcedure byte unset "
+ "(reset timeout)\n");
+ dev->procbyte = inb(REG_FLAGS1(iobase));
+ DEBUGP(1, dev, "Read procedure byte 0x%.2x\n",
+ dev->procbyte);
+ i = 0; /* resettimeout */
+ }
+ if (inb(REG_FLAGS0(iobase)) & 0x08) {
+ DEBUGP(1, dev, "T0Done flag (read reply)\n");
+ break;
+ }
+ }
+ if (dev->proto)
+ infolen = inb(REG_FLAGS1(iobase));
+ }
+ if (i == 600) {
+ DEBUGP(1, dev, "timeout waiting for numRecBytes\n");
+ rc = -EIO;
+ goto release_io;
+ } else {
+ if (dev->proto == 0) {
+ DEBUGP(1, dev, "Wait for T0Done bit to be set\n");
+ for (i = 0; i < 1000; i++) {
+ if (inb(REG_FLAGS0(iobase)) & 0x08)
+ break;
+ msleep_interruptible(10);
+ }
+ if (i == 1000) {
+ DEBUGP(1, dev, "timeout waiting for T0Done\n");
+ rc = -EIO;
+ goto release_io;
+ }
+
+ dev->procbyte = inb(REG_FLAGS1(iobase));
+ DEBUGP(4, dev, "Read procedure byte 0x%.2x\n",
+ dev->procbyte);
+
+ io_read_num_rec_bytes(iobase, &dev->rlen);
+ DEBUGP(4, dev, "Read NumRecBytes = %i\n", dev->rlen);
+
+ }
+ }
+ /* T=1: read offset=zero, T=0: read offset=after challenge */
+ dev->rpos = dev->proto ? 0 : nr == 4 ? 5 : nr > dev->rlen ? 5 : nr;
+ DEBUGP(4, dev, "dev->rlen = %i, dev->rpos = %i, nr = %i\n",
+ dev->rlen, dev->rpos, nr);
+
+release_io:
+ DEBUGP(4, dev, "Reset SM\n");
+ xoutb(0x80, REG_FLAGS0(iobase)); /* reset SM */
+
+ if (rc < 0) {
+ DEBUGP(4, dev, "Write failed but clear T_Active\n");
+ dev->flags1 &= 0xdf;
+ xoutb(dev->flags1, REG_FLAGS1(iobase));
+ }
+
+ clear_bit(LOCK_IO, &dev->flags);
+ wake_up_interruptible(&dev->ioq);
+ wake_up_interruptible(&dev->readq); /* tell read we have data */
+
+ /* ITSEC E2: clear write buffer */
+ memset((char *)dev->sbuf, 0, 512);
+
+ /* return error or actually written bytes */
+ DEBUGP(2, dev, "<- cmm_write\n");
+ return rc < 0 ? rc : nr;
+}
+
+static void start_monitor(struct cm4000_dev *dev)
+{
+ DEBUGP(3, dev, "-> start_monitor\n");
+ if (!dev->monitor_running) {
+ DEBUGP(5, dev, "create, init and add timer\n");
+ timer_setup(&dev->timer, monitor_card, 0);
+ dev->monitor_running = 1;
+ mod_timer(&dev->timer, jiffies);
+ } else
+ DEBUGP(5, dev, "monitor already running\n");
+ DEBUGP(3, dev, "<- start_monitor\n");
+}
+
+static void stop_monitor(struct cm4000_dev *dev)
+{
+ DEBUGP(3, dev, "-> stop_monitor\n");
+ if (dev->monitor_running) {
+ DEBUGP(5, dev, "stopping monitor\n");
+ terminate_monitor(dev);
+ /* reset monitor SM */
+ clear_bit(IS_ATR_VALID, &dev->flags);
+ clear_bit(IS_ATR_PRESENT, &dev->flags);
+ } else
+ DEBUGP(5, dev, "monitor already stopped\n");
+ DEBUGP(3, dev, "<- stop_monitor\n");
+}
+
+static long cmm_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
+{
+ struct cm4000_dev *dev = filp->private_data;
+ unsigned int iobase = dev->p_dev->resource[0]->start;
+ struct inode *inode = file_inode(filp);
+ struct pcmcia_device *link;
+ int rc;
+ void __user *argp = (void __user *)arg;
+#ifdef CM4000_DEBUG
+ char *ioctl_names[CM_IOC_MAXNR + 1] = {
+ [_IOC_NR(CM_IOCGSTATUS)] "CM_IOCGSTATUS",
+ [_IOC_NR(CM_IOCGATR)] "CM_IOCGATR",
+ [_IOC_NR(CM_IOCARDOFF)] "CM_IOCARDOFF",
+ [_IOC_NR(CM_IOCSPTS)] "CM_IOCSPTS",
+ [_IOC_NR(CM_IOSDBGLVL)] "CM4000_DBGLVL",
+ };
+ DEBUGP(3, dev, "cmm_ioctl(device=%d.%d) %s\n", imajor(inode),
+ iminor(inode), ioctl_names[_IOC_NR(cmd)]);
+#endif
+
+ mutex_lock(&cmm_mutex);
+ rc = -ENODEV;
+ link = dev_table[iminor(inode)];
+ if (!pcmcia_dev_present(link)) {
+ DEBUGP(4, dev, "DEV_OK false\n");
+ goto out;
+ }
+
+ if (test_bit(IS_CMM_ABSENT, &dev->flags)) {
+ DEBUGP(4, dev, "CMM_ABSENT flag set\n");
+ goto out;
+ }
+ rc = -EINVAL;
+
+ if (_IOC_TYPE(cmd) != CM_IOC_MAGIC) {
+ DEBUGP(4, dev, "ioctype mismatch\n");
+ goto out;
+ }
+ if (_IOC_NR(cmd) > CM_IOC_MAXNR) {
+ DEBUGP(4, dev, "iocnr mismatch\n");
+ goto out;
+ }
+ rc = 0;
+
+ switch (cmd) {
+ case CM_IOCGSTATUS:
+ DEBUGP(4, dev, " ... in CM_IOCGSTATUS\n");
+ {
+ int status;
+
+ /* clear other bits, but leave inserted & powered as
+ * they are */
+ status = dev->flags0 & 3;
+ if (test_bit(IS_ATR_PRESENT, &dev->flags))
+ status |= CM_ATR_PRESENT;
+ if (test_bit(IS_ATR_VALID, &dev->flags))
+ status |= CM_ATR_VALID;
+ if (test_bit(IS_CMM_ABSENT, &dev->flags))
+ status |= CM_NO_READER;
+ if (test_bit(IS_BAD_CARD, &dev->flags))
+ status |= CM_BAD_CARD;
+ if (copy_to_user(argp, &status, sizeof(int)))
+ rc = -EFAULT;
+ }
+ break;
+ case CM_IOCGATR:
+ DEBUGP(4, dev, "... in CM_IOCGATR\n");
+ {
+ struct atreq __user *atreq = argp;
+ int tmp;
+ /* allow nonblocking io and being interrupted */
+ if (wait_event_interruptible
+ (dev->atrq,
+ ((filp->f_flags & O_NONBLOCK)
+ || (test_bit(IS_ATR_PRESENT, (void *)&dev->flags)
+ != 0)))) {
+ if (filp->f_flags & O_NONBLOCK)
+ rc = -EAGAIN;
+ else
+ rc = -ERESTARTSYS;
+ break;
+ }
+
+ rc = -EFAULT;
+ if (test_bit(IS_ATR_VALID, &dev->flags) == 0) {
+ tmp = -1;
+ if (copy_to_user(&(atreq->atr_len), &tmp,
+ sizeof(int)))
+ break;
+ } else {
+ if (copy_to_user(atreq->atr, dev->atr,
+ dev->atr_len))
+ break;
+
+ tmp = dev->atr_len;
+ if (copy_to_user(&(atreq->atr_len), &tmp, sizeof(int)))
+ break;
+ }
+ rc = 0;
+ break;
+ }
+ case CM_IOCARDOFF:
+
+#ifdef CM4000_DEBUG
+ DEBUGP(4, dev, "... in CM_IOCARDOFF\n");
+ if (dev->flags0 & 0x01) {
+ DEBUGP(4, dev, " Card inserted\n");
+ } else {
+ DEBUGP(2, dev, " No card inserted\n");
+ }
+ if (dev->flags0 & 0x02) {
+ DEBUGP(4, dev, " Card powered\n");
+ } else {
+ DEBUGP(2, dev, " Card not powered\n");
+ }
+#endif
+
+ /* is a card inserted and powered? */
+ if ((dev->flags0 & 0x01) && (dev->flags0 & 0x02)) {
+
+ /* get IO lock */
+ if (wait_event_interruptible
+ (dev->ioq,
+ ((filp->f_flags & O_NONBLOCK)
+ || (test_and_set_bit(LOCK_IO, (void *)&dev->flags)
+ == 0)))) {
+ if (filp->f_flags & O_NONBLOCK)
+ rc = -EAGAIN;
+ else
+ rc = -ERESTARTSYS;
+ break;
+ }
+ /* Set Flags0 = 0x42 */
+ DEBUGP(4, dev, "Set Flags0=0x42 \n");
+ xoutb(0x42, REG_FLAGS0(iobase));
+ clear_bit(IS_ATR_PRESENT, &dev->flags);
+ clear_bit(IS_ATR_VALID, &dev->flags);
+ dev->mstate = M_CARDOFF;
+ clear_bit(LOCK_IO, &dev->flags);
+ if (wait_event_interruptible
+ (dev->atrq,
+ ((filp->f_flags & O_NONBLOCK)
+ || (test_bit(IS_ATR_VALID, (void *)&dev->flags) !=
+ 0)))) {
+ if (filp->f_flags & O_NONBLOCK)
+ rc = -EAGAIN;
+ else
+ rc = -ERESTARTSYS;
+ break;
+ }
+ }
+ /* release lock */
+ clear_bit(LOCK_IO, &dev->flags);
+ wake_up_interruptible(&dev->ioq);
+
+ rc = 0;
+ break;
+ case CM_IOCSPTS:
+ {
+ struct ptsreq krnptsreq;
+
+ if (copy_from_user(&krnptsreq, argp,
+ sizeof(struct ptsreq))) {
+ rc = -EFAULT;
+ break;
+ }
+
+ rc = 0;
+ DEBUGP(4, dev, "... in CM_IOCSPTS\n");
+ /* wait for ATR to get valid */
+ if (wait_event_interruptible
+ (dev->atrq,
+ ((filp->f_flags & O_NONBLOCK)
+ || (test_bit(IS_ATR_PRESENT, (void *)&dev->flags)
+ != 0)))) {
+ if (filp->f_flags & O_NONBLOCK)
+ rc = -EAGAIN;
+ else
+ rc = -ERESTARTSYS;
+ break;
+ }
+ /* get IO lock */
+ if (wait_event_interruptible
+ (dev->ioq,
+ ((filp->f_flags & O_NONBLOCK)
+ || (test_and_set_bit(LOCK_IO, (void *)&dev->flags)
+ == 0)))) {
+ if (filp->f_flags & O_NONBLOCK)
+ rc = -EAGAIN;
+ else
+ rc = -ERESTARTSYS;
+ break;
+ }
+
+ if ((rc = set_protocol(dev, &krnptsreq)) != 0) {
+ /* auto power_on again */
+ dev->mstate = M_FETCH_ATR;
+ clear_bit(IS_ATR_VALID, &dev->flags);
+ }
+ /* release lock */
+ clear_bit(LOCK_IO, &dev->flags);
+ wake_up_interruptible(&dev->ioq);
+
+ }
+ break;
+#ifdef CM4000_DEBUG
+ case CM_IOSDBGLVL:
+ rc = -ENOTTY;
+ break;
+#endif
+ default:
+ DEBUGP(4, dev, "... in default (unknown IOCTL code)\n");
+ rc = -ENOTTY;
+ }
+out:
+ mutex_unlock(&cmm_mutex);
+ return rc;
+}
+
+static int cmm_open(struct inode *inode, struct file *filp)
+{
+ struct cm4000_dev *dev;
+ struct pcmcia_device *link;
+ int minor = iminor(inode);
+ int ret;
+
+ if (minor >= CM4000_MAX_DEV)
+ return -ENODEV;
+
+ mutex_lock(&cmm_mutex);
+ link = dev_table[minor];
+ if (link == NULL || !pcmcia_dev_present(link)) {
+ ret = -ENODEV;
+ goto out;
+ }
+
+ if (link->open) {
+ ret = -EBUSY;
+ goto out;
+ }
+
+ dev = link->priv;
+ filp->private_data = dev;
+
+ DEBUGP(2, dev, "-> cmm_open(device=%d.%d process=%s,%d)\n",
+ imajor(inode), minor, current->comm, current->pid);
+
+ /* init device variables, they may be "polluted" after close
+ * or, the device may never have been closed (i.e. open failed)
+ */
+
+ ZERO_DEV(dev);
+
+ /* opening will always block since the
+ * monitor will be started by open, which
+ * means we have to wait for ATR becoming
+ * valid = block until valid (or card
+ * inserted)
+ */
+ if (filp->f_flags & O_NONBLOCK) {
+ ret = -EAGAIN;
+ goto out;
+ }
+
+ dev->mdelay = T_50MSEC;
+
+ /* start monitoring the cardstatus */
+ start_monitor(dev);
+
+ link->open = 1; /* only one open per device */
+
+ DEBUGP(2, dev, "<- cmm_open\n");
+ ret = stream_open(inode, filp);
+out:
+ mutex_unlock(&cmm_mutex);
+ return ret;
+}
+
+static int cmm_close(struct inode *inode, struct file *filp)
+{
+ struct cm4000_dev *dev;
+ struct pcmcia_device *link;
+ int minor = iminor(inode);
+
+ if (minor >= CM4000_MAX_DEV)
+ return -ENODEV;
+
+ link = dev_table[minor];
+ if (link == NULL)
+ return -ENODEV;
+
+ dev = link->priv;
+
+ DEBUGP(2, dev, "-> cmm_close(maj/min=%d.%d)\n",
+ imajor(inode), minor);
+
+ stop_monitor(dev);
+
+ ZERO_DEV(dev);
+
+ link->open = 0; /* only one open per device */
+ wake_up(&dev->devq); /* socket removed? */
+
+ DEBUGP(2, dev, "cmm_close\n");
+ return 0;
+}
+
+static void cmm_cm4000_release(struct pcmcia_device * link)
+{
+ struct cm4000_dev *dev = link->priv;
+
+ /* dont terminate the monitor, rather rely on
+ * close doing that for us.
+ */
+ DEBUGP(3, dev, "-> cmm_cm4000_release\n");
+ while (link->open) {
+ printk(KERN_INFO MODULE_NAME ": delaying release until "
+ "process has terminated\n");
+ /* note: don't interrupt us:
+ * close the applications which own
+ * the devices _first_ !
+ */
+ wait_event(dev->devq, (link->open == 0));
+ }
+ /* dev->devq=NULL; this cannot be zeroed earlier */
+ DEBUGP(3, dev, "<- cmm_cm4000_release\n");
+ return;
+}
+
+/*==== Interface to PCMCIA Layer =======================================*/
+
+static int cm4000_config_check(struct pcmcia_device *p_dev, void *priv_data)
+{
+ return pcmcia_request_io(p_dev);
+}
+
+static int cm4000_config(struct pcmcia_device * link, int devno)
+{
+ link->config_flags |= CONF_AUTO_SET_IO;
+
+ /* read the config-tuples */
+ if (pcmcia_loop_config(link, cm4000_config_check, NULL))
+ goto cs_release;
+
+ if (pcmcia_enable_device(link))
+ goto cs_release;
+
+ return 0;
+
+cs_release:
+ cm4000_release(link);
+ return -ENODEV;
+}
+
+static int cm4000_suspend(struct pcmcia_device *link)
+{
+ struct cm4000_dev *dev;
+
+ dev = link->priv;
+ stop_monitor(dev);
+
+ return 0;
+}
+
+static int cm4000_resume(struct pcmcia_device *link)
+{
+ struct cm4000_dev *dev;
+
+ dev = link->priv;
+ if (link->open)
+ start_monitor(dev);
+
+ return 0;
+}
+
+static void cm4000_release(struct pcmcia_device *link)
+{
+ cmm_cm4000_release(link); /* delay release until device closed */
+ pcmcia_disable_device(link);
+}
+
+static int cm4000_probe(struct pcmcia_device *link)
+{
+ struct cm4000_dev *dev;
+ int i, ret;
+
+ for (i = 0; i < CM4000_MAX_DEV; i++)
+ if (dev_table[i] == NULL)
+ break;
+
+ if (i == CM4000_MAX_DEV) {
+ printk(KERN_NOTICE MODULE_NAME ": all devices in use\n");
+ return -ENODEV;
+ }
+
+ /* create a new cm4000_cs device */
+ dev = kzalloc(sizeof(struct cm4000_dev), GFP_KERNEL);
+ if (dev == NULL)
+ return -ENOMEM;
+
+ dev->p_dev = link;
+ link->priv = dev;
+ dev_table[i] = link;
+
+ init_waitqueue_head(&dev->devq);
+ init_waitqueue_head(&dev->ioq);
+ init_waitqueue_head(&dev->atrq);
+ init_waitqueue_head(&dev->readq);
+
+ ret = cm4000_config(link, i);
+ if (ret) {
+ dev_table[i] = NULL;
+ kfree(dev);
+ return ret;
+ }
+
+ device_create(cmm_class, NULL, MKDEV(major, i), NULL, "cmm%d", i);
+
+ return 0;
+}
+
+static void cm4000_detach(struct pcmcia_device *link)
+{
+ struct cm4000_dev *dev = link->priv;
+ int devno;
+
+ /* find device */
+ for (devno = 0; devno < CM4000_MAX_DEV; devno++)
+ if (dev_table[devno] == link)
+ break;
+ if (devno == CM4000_MAX_DEV)
+ return;
+
+ stop_monitor(dev);
+
+ cm4000_release(link);
+
+ dev_table[devno] = NULL;
+ kfree(dev);
+
+ device_destroy(cmm_class, MKDEV(major, devno));
+
+ return;
+}
+
+static const struct file_operations cm4000_fops = {
+ .owner = THIS_MODULE,
+ .read = cmm_read,
+ .write = cmm_write,
+ .unlocked_ioctl = cmm_ioctl,
+ .open = cmm_open,
+ .release= cmm_close,
+ .llseek = no_llseek,
+};
+
+static const struct pcmcia_device_id cm4000_ids[] = {
+ PCMCIA_DEVICE_MANF_CARD(0x0223, 0x0002),
+ PCMCIA_DEVICE_PROD_ID12("CardMan", "4000", 0x2FB368CA, 0xA2BD8C39),
+ PCMCIA_DEVICE_NULL,
+};
+MODULE_DEVICE_TABLE(pcmcia, cm4000_ids);
+
+static struct pcmcia_driver cm4000_driver = {
+ .owner = THIS_MODULE,
+ .name = "cm4000_cs",
+ .probe = cm4000_probe,
+ .remove = cm4000_detach,
+ .suspend = cm4000_suspend,
+ .resume = cm4000_resume,
+ .id_table = cm4000_ids,
+};
+
+static int __init cmm_init(void)
+{
+ int rc;
+
+ cmm_class = class_create(THIS_MODULE, "cardman_4000");
+ if (IS_ERR(cmm_class))
+ return PTR_ERR(cmm_class);
+
+ major = register_chrdev(0, DEVICE_NAME, &cm4000_fops);
+ if (major < 0) {
+ printk(KERN_WARNING MODULE_NAME
+ ": could not get major number\n");
+ class_destroy(cmm_class);
+ return major;
+ }
+
+ rc = pcmcia_register_driver(&cm4000_driver);
+ if (rc < 0) {
+ unregister_chrdev(major, DEVICE_NAME);
+ class_destroy(cmm_class);
+ return rc;
+ }
+
+ return 0;
+}
+
+static void __exit cmm_exit(void)
+{
+ pcmcia_unregister_driver(&cm4000_driver);
+ unregister_chrdev(major, DEVICE_NAME);
+ class_destroy(cmm_class);
+};
+
+module_init(cmm_init);
+module_exit(cmm_exit);
+MODULE_LICENSE("Dual BSD/GPL");
diff --git a/drivers/char/pcmcia/cm4040_cs.c b/drivers/char/pcmcia/cm4040_cs.c
new file mode 100644
index 000000000..827711911
--- /dev/null
+++ b/drivers/char/pcmcia/cm4040_cs.c
@@ -0,0 +1,684 @@
+/*
+ * A driver for the Omnikey PCMCIA smartcard reader CardMan 4040
+ *
+ * (c) 2000-2004 Omnikey AG (http://www.omnikey.com/)
+ *
+ * (C) 2005-2006 Harald Welte <laforge@gnumonks.org>
+ * - add support for poll()
+ * - driver cleanup
+ * - add waitqueues
+ * - adhere to linux kernel coding style and policies
+ * - support 2.6.13 "new style" pcmcia interface
+ * - add class interface for udev device creation
+ *
+ * The device basically is a USB CCID compliant device that has been
+ * attached to an I/O-Mapped FIFO.
+ *
+ * All rights reserved, Dual BSD/GPL Licensed.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/init.h>
+#include <linux/fs.h>
+#include <linux/delay.h>
+#include <linux/poll.h>
+#include <linux/mutex.h>
+#include <linux/wait.h>
+#include <linux/uaccess.h>
+#include <asm/io.h>
+
+#include <pcmcia/cistpl.h>
+#include <pcmcia/cisreg.h>
+#include <pcmcia/ciscode.h>
+#include <pcmcia/ds.h>
+
+#include "cm4040_cs.h"
+
+
+#define reader_to_dev(x) (&x->p_dev->dev)
+
+/* n (debug level) is ignored */
+/* additional debug output may be enabled by re-compiling with
+ * CM4040_DEBUG set */
+/* #define CM4040_DEBUG */
+#define DEBUGP(n, rdr, x, args...) do { \
+ dev_dbg(reader_to_dev(rdr), "%s:" x, \
+ __func__ , ## args); \
+ } while (0)
+
+static DEFINE_MUTEX(cm4040_mutex);
+
+#define CCID_DRIVER_BULK_DEFAULT_TIMEOUT (150*HZ)
+#define CCID_DRIVER_ASYNC_POWERUP_TIMEOUT (35*HZ)
+#define CCID_DRIVER_MINIMUM_TIMEOUT (3*HZ)
+#define READ_WRITE_BUFFER_SIZE 512
+#define POLL_LOOP_COUNT 1000
+
+/* how often to poll for fifo status change */
+#define POLL_PERIOD msecs_to_jiffies(10)
+
+static void reader_release(struct pcmcia_device *link);
+
+static int major;
+static struct class *cmx_class;
+
+#define BS_READABLE 0x01
+#define BS_WRITABLE 0x02
+
+struct reader_dev {
+ struct pcmcia_device *p_dev;
+ wait_queue_head_t devq;
+ wait_queue_head_t poll_wait;
+ wait_queue_head_t read_wait;
+ wait_queue_head_t write_wait;
+ unsigned long buffer_status;
+ unsigned long timeout;
+ unsigned char s_buf[READ_WRITE_BUFFER_SIZE];
+ unsigned char r_buf[READ_WRITE_BUFFER_SIZE];
+ struct timer_list poll_timer;
+};
+
+static struct pcmcia_device *dev_table[CM_MAX_DEV];
+
+#ifndef CM4040_DEBUG
+#define xoutb outb
+#define xinb inb
+#else
+static inline void xoutb(unsigned char val, unsigned short port)
+{
+ pr_debug("outb(val=%.2x,port=%.4x)\n", val, port);
+ outb(val, port);
+}
+
+static inline unsigned char xinb(unsigned short port)
+{
+ unsigned char val;
+
+ val = inb(port);
+ pr_debug("%.2x=inb(%.4x)\n", val, port);
+ return val;
+}
+#endif
+
+/* poll the device fifo status register. not to be confused with
+ * the poll syscall. */
+static void cm4040_do_poll(struct timer_list *t)
+{
+ struct reader_dev *dev = from_timer(dev, t, poll_timer);
+ unsigned int obs = xinb(dev->p_dev->resource[0]->start
+ + REG_OFFSET_BUFFER_STATUS);
+
+ if ((obs & BSR_BULK_IN_FULL)) {
+ set_bit(BS_READABLE, &dev->buffer_status);
+ DEBUGP(4, dev, "waking up read_wait\n");
+ wake_up_interruptible(&dev->read_wait);
+ } else
+ clear_bit(BS_READABLE, &dev->buffer_status);
+
+ if (!(obs & BSR_BULK_OUT_FULL)) {
+ set_bit(BS_WRITABLE, &dev->buffer_status);
+ DEBUGP(4, dev, "waking up write_wait\n");
+ wake_up_interruptible(&dev->write_wait);
+ } else
+ clear_bit(BS_WRITABLE, &dev->buffer_status);
+
+ if (dev->buffer_status)
+ wake_up_interruptible(&dev->poll_wait);
+
+ mod_timer(&dev->poll_timer, jiffies + POLL_PERIOD);
+}
+
+static void cm4040_stop_poll(struct reader_dev *dev)
+{
+ del_timer_sync(&dev->poll_timer);
+}
+
+static int wait_for_bulk_out_ready(struct reader_dev *dev)
+{
+ int i, rc;
+ int iobase = dev->p_dev->resource[0]->start;
+
+ for (i = 0; i < POLL_LOOP_COUNT; i++) {
+ if ((xinb(iobase + REG_OFFSET_BUFFER_STATUS)
+ & BSR_BULK_OUT_FULL) == 0) {
+ DEBUGP(4, dev, "BulkOut empty (i=%d)\n", i);
+ return 1;
+ }
+ }
+
+ DEBUGP(4, dev, "wait_event_interruptible_timeout(timeout=%ld\n",
+ dev->timeout);
+ rc = wait_event_interruptible_timeout(dev->write_wait,
+ test_and_clear_bit(BS_WRITABLE,
+ &dev->buffer_status),
+ dev->timeout);
+
+ if (rc > 0)
+ DEBUGP(4, dev, "woke up: BulkOut empty\n");
+ else if (rc == 0)
+ DEBUGP(4, dev, "woke up: BulkOut full, returning 0 :(\n");
+ else if (rc < 0)
+ DEBUGP(4, dev, "woke up: signal arrived\n");
+
+ return rc;
+}
+
+/* Write to Sync Control Register */
+static int write_sync_reg(unsigned char val, struct reader_dev *dev)
+{
+ int iobase = dev->p_dev->resource[0]->start;
+ int rc;
+
+ rc = wait_for_bulk_out_ready(dev);
+ if (rc <= 0)
+ return rc;
+
+ xoutb(val, iobase + REG_OFFSET_SYNC_CONTROL);
+ rc = wait_for_bulk_out_ready(dev);
+ if (rc <= 0)
+ return rc;
+
+ return 1;
+}
+
+static int wait_for_bulk_in_ready(struct reader_dev *dev)
+{
+ int i, rc;
+ int iobase = dev->p_dev->resource[0]->start;
+
+ for (i = 0; i < POLL_LOOP_COUNT; i++) {
+ if ((xinb(iobase + REG_OFFSET_BUFFER_STATUS)
+ & BSR_BULK_IN_FULL) == BSR_BULK_IN_FULL) {
+ DEBUGP(3, dev, "BulkIn full (i=%d)\n", i);
+ return 1;
+ }
+ }
+
+ DEBUGP(4, dev, "wait_event_interruptible_timeout(timeout=%ld\n",
+ dev->timeout);
+ rc = wait_event_interruptible_timeout(dev->read_wait,
+ test_and_clear_bit(BS_READABLE,
+ &dev->buffer_status),
+ dev->timeout);
+ if (rc > 0)
+ DEBUGP(4, dev, "woke up: BulkIn full\n");
+ else if (rc == 0)
+ DEBUGP(4, dev, "woke up: BulkIn not full, returning 0 :(\n");
+ else if (rc < 0)
+ DEBUGP(4, dev, "woke up: signal arrived\n");
+
+ return rc;
+}
+
+static ssize_t cm4040_read(struct file *filp, char __user *buf,
+ size_t count, loff_t *ppos)
+{
+ struct reader_dev *dev = filp->private_data;
+ int iobase = dev->p_dev->resource[0]->start;
+ size_t bytes_to_read;
+ unsigned long i;
+ size_t min_bytes_to_read;
+ int rc;
+
+ DEBUGP(2, dev, "-> cm4040_read(%s,%d)\n", current->comm, current->pid);
+
+ if (count == 0)
+ return 0;
+
+ if (count < 10)
+ return -EFAULT;
+
+ if (filp->f_flags & O_NONBLOCK) {
+ DEBUGP(4, dev, "filep->f_flags O_NONBLOCK set\n");
+ DEBUGP(2, dev, "<- cm4040_read (failure)\n");
+ return -EAGAIN;
+ }
+
+ if (!pcmcia_dev_present(dev->p_dev))
+ return -ENODEV;
+
+ for (i = 0; i < 5; i++) {
+ rc = wait_for_bulk_in_ready(dev);
+ if (rc <= 0) {
+ DEBUGP(5, dev, "wait_for_bulk_in_ready rc=%.2x\n", rc);
+ DEBUGP(2, dev, "<- cm4040_read (failed)\n");
+ if (rc == -ERESTARTSYS)
+ return rc;
+ return -EIO;
+ }
+ dev->r_buf[i] = xinb(iobase + REG_OFFSET_BULK_IN);
+#ifdef CM4040_DEBUG
+ pr_debug("%lu:%2x ", i, dev->r_buf[i]);
+ }
+ pr_debug("\n");
+#else
+ }
+#endif
+
+ bytes_to_read = 5 + le32_to_cpu(*(__le32 *)&dev->r_buf[1]);
+
+ DEBUGP(6, dev, "BytesToRead=%zu\n", bytes_to_read);
+
+ min_bytes_to_read = min(count, bytes_to_read + 5);
+ min_bytes_to_read = min_t(size_t, min_bytes_to_read, READ_WRITE_BUFFER_SIZE);
+
+ DEBUGP(6, dev, "Min=%zu\n", min_bytes_to_read);
+
+ for (i = 0; i < (min_bytes_to_read-5); i++) {
+ rc = wait_for_bulk_in_ready(dev);
+ if (rc <= 0) {
+ DEBUGP(5, dev, "wait_for_bulk_in_ready rc=%.2x\n", rc);
+ DEBUGP(2, dev, "<- cm4040_read (failed)\n");
+ if (rc == -ERESTARTSYS)
+ return rc;
+ return -EIO;
+ }
+ dev->r_buf[i+5] = xinb(iobase + REG_OFFSET_BULK_IN);
+#ifdef CM4040_DEBUG
+ pr_debug("%lu:%2x ", i, dev->r_buf[i]);
+ }
+ pr_debug("\n");
+#else
+ }
+#endif
+
+ *ppos = min_bytes_to_read;
+ if (copy_to_user(buf, dev->r_buf, min_bytes_to_read))
+ return -EFAULT;
+
+ rc = wait_for_bulk_in_ready(dev);
+ if (rc <= 0) {
+ DEBUGP(5, dev, "wait_for_bulk_in_ready rc=%.2x\n", rc);
+ DEBUGP(2, dev, "<- cm4040_read (failed)\n");
+ if (rc == -ERESTARTSYS)
+ return rc;
+ return -EIO;
+ }
+
+ rc = write_sync_reg(SCR_READER_TO_HOST_DONE, dev);
+ if (rc <= 0) {
+ DEBUGP(5, dev, "write_sync_reg c=%.2x\n", rc);
+ DEBUGP(2, dev, "<- cm4040_read (failed)\n");
+ if (rc == -ERESTARTSYS)
+ return rc;
+ else
+ return -EIO;
+ }
+
+ xinb(iobase + REG_OFFSET_BULK_IN);
+
+ DEBUGP(2, dev, "<- cm4040_read (successfully)\n");
+ return min_bytes_to_read;
+}
+
+static ssize_t cm4040_write(struct file *filp, const char __user *buf,
+ size_t count, loff_t *ppos)
+{
+ struct reader_dev *dev = filp->private_data;
+ int iobase = dev->p_dev->resource[0]->start;
+ ssize_t rc;
+ int i;
+ unsigned int bytes_to_write;
+
+ DEBUGP(2, dev, "-> cm4040_write(%s,%d)\n", current->comm, current->pid);
+
+ if (count == 0) {
+ DEBUGP(2, dev, "<- cm4040_write empty read (successfully)\n");
+ return 0;
+ }
+
+ if ((count < 5) || (count > READ_WRITE_BUFFER_SIZE)) {
+ DEBUGP(2, dev, "<- cm4040_write buffersize=%zd < 5\n", count);
+ return -EIO;
+ }
+
+ if (filp->f_flags & O_NONBLOCK) {
+ DEBUGP(4, dev, "filep->f_flags O_NONBLOCK set\n");
+ DEBUGP(4, dev, "<- cm4040_write (failure)\n");
+ return -EAGAIN;
+ }
+
+ if (!pcmcia_dev_present(dev->p_dev))
+ return -ENODEV;
+
+ bytes_to_write = count;
+ if (copy_from_user(dev->s_buf, buf, bytes_to_write))
+ return -EFAULT;
+
+ switch (dev->s_buf[0]) {
+ case CMD_PC_TO_RDR_XFRBLOCK:
+ case CMD_PC_TO_RDR_SECURE:
+ case CMD_PC_TO_RDR_TEST_SECURE:
+ case CMD_PC_TO_RDR_OK_SECURE:
+ dev->timeout = CCID_DRIVER_BULK_DEFAULT_TIMEOUT;
+ break;
+
+ case CMD_PC_TO_RDR_ICCPOWERON:
+ dev->timeout = CCID_DRIVER_ASYNC_POWERUP_TIMEOUT;
+ break;
+
+ case CMD_PC_TO_RDR_GETSLOTSTATUS:
+ case CMD_PC_TO_RDR_ICCPOWEROFF:
+ case CMD_PC_TO_RDR_GETPARAMETERS:
+ case CMD_PC_TO_RDR_RESETPARAMETERS:
+ case CMD_PC_TO_RDR_SETPARAMETERS:
+ case CMD_PC_TO_RDR_ESCAPE:
+ case CMD_PC_TO_RDR_ICCCLOCK:
+ default:
+ dev->timeout = CCID_DRIVER_MINIMUM_TIMEOUT;
+ break;
+ }
+
+ rc = write_sync_reg(SCR_HOST_TO_READER_START, dev);
+ if (rc <= 0) {
+ DEBUGP(5, dev, "write_sync_reg c=%.2zx\n", rc);
+ DEBUGP(2, dev, "<- cm4040_write (failed)\n");
+ if (rc == -ERESTARTSYS)
+ return rc;
+ else
+ return -EIO;
+ }
+
+ DEBUGP(4, dev, "start \n");
+
+ for (i = 0; i < bytes_to_write; i++) {
+ rc = wait_for_bulk_out_ready(dev);
+ if (rc <= 0) {
+ DEBUGP(5, dev, "wait_for_bulk_out_ready rc=%.2zx\n",
+ rc);
+ DEBUGP(2, dev, "<- cm4040_write (failed)\n");
+ if (rc == -ERESTARTSYS)
+ return rc;
+ else
+ return -EIO;
+ }
+
+ xoutb(dev->s_buf[i],iobase + REG_OFFSET_BULK_OUT);
+ }
+ DEBUGP(4, dev, "end\n");
+
+ rc = write_sync_reg(SCR_HOST_TO_READER_DONE, dev);
+
+ if (rc <= 0) {
+ DEBUGP(5, dev, "write_sync_reg c=%.2zx\n", rc);
+ DEBUGP(2, dev, "<- cm4040_write (failed)\n");
+ if (rc == -ERESTARTSYS)
+ return rc;
+ else
+ return -EIO;
+ }
+
+ DEBUGP(2, dev, "<- cm4040_write (successfully)\n");
+ return count;
+}
+
+static __poll_t cm4040_poll(struct file *filp, poll_table *wait)
+{
+ struct reader_dev *dev = filp->private_data;
+ __poll_t mask = 0;
+
+ poll_wait(filp, &dev->poll_wait, wait);
+
+ if (test_and_clear_bit(BS_READABLE, &dev->buffer_status))
+ mask |= EPOLLIN | EPOLLRDNORM;
+ if (test_and_clear_bit(BS_WRITABLE, &dev->buffer_status))
+ mask |= EPOLLOUT | EPOLLWRNORM;
+
+ DEBUGP(2, dev, "<- cm4040_poll(%u)\n", mask);
+
+ return mask;
+}
+
+static int cm4040_open(struct inode *inode, struct file *filp)
+{
+ struct reader_dev *dev;
+ struct pcmcia_device *link;
+ int minor = iminor(inode);
+ int ret;
+
+ if (minor >= CM_MAX_DEV)
+ return -ENODEV;
+
+ mutex_lock(&cm4040_mutex);
+ link = dev_table[minor];
+ if (link == NULL || !pcmcia_dev_present(link)) {
+ ret = -ENODEV;
+ goto out;
+ }
+
+ if (link->open) {
+ ret = -EBUSY;
+ goto out;
+ }
+
+ dev = link->priv;
+ filp->private_data = dev;
+
+ if (filp->f_flags & O_NONBLOCK) {
+ DEBUGP(4, dev, "filep->f_flags O_NONBLOCK set\n");
+ ret = -EAGAIN;
+ goto out;
+ }
+
+ link->open = 1;
+
+ mod_timer(&dev->poll_timer, jiffies + POLL_PERIOD);
+
+ DEBUGP(2, dev, "<- cm4040_open (successfully)\n");
+ ret = nonseekable_open(inode, filp);
+out:
+ mutex_unlock(&cm4040_mutex);
+ return ret;
+}
+
+static int cm4040_close(struct inode *inode, struct file *filp)
+{
+ struct reader_dev *dev = filp->private_data;
+ struct pcmcia_device *link;
+ int minor = iminor(inode);
+
+ DEBUGP(2, dev, "-> cm4040_close(maj/min=%d.%d)\n", imajor(inode),
+ iminor(inode));
+
+ if (minor >= CM_MAX_DEV)
+ return -ENODEV;
+
+ link = dev_table[minor];
+ if (link == NULL)
+ return -ENODEV;
+
+ cm4040_stop_poll(dev);
+
+ link->open = 0;
+ wake_up(&dev->devq);
+
+ DEBUGP(2, dev, "<- cm4040_close\n");
+ return 0;
+}
+
+static void cm4040_reader_release(struct pcmcia_device *link)
+{
+ struct reader_dev *dev = link->priv;
+
+ DEBUGP(3, dev, "-> cm4040_reader_release\n");
+ while (link->open) {
+ DEBUGP(3, dev, MODULE_NAME ": delaying release "
+ "until process has terminated\n");
+ wait_event(dev->devq, (link->open == 0));
+ }
+ DEBUGP(3, dev, "<- cm4040_reader_release\n");
+ return;
+}
+
+static int cm4040_config_check(struct pcmcia_device *p_dev, void *priv_data)
+{
+ return pcmcia_request_io(p_dev);
+}
+
+
+static int reader_config(struct pcmcia_device *link, int devno)
+{
+ struct reader_dev *dev;
+ int fail_rc;
+
+ link->config_flags |= CONF_AUTO_SET_IO;
+
+ if (pcmcia_loop_config(link, cm4040_config_check, NULL))
+ goto cs_release;
+
+ fail_rc = pcmcia_enable_device(link);
+ if (fail_rc != 0) {
+ dev_info(&link->dev, "pcmcia_enable_device failed 0x%x\n",
+ fail_rc);
+ goto cs_release;
+ }
+
+ dev = link->priv;
+
+ DEBUGP(2, dev, "device " DEVICE_NAME "%d at %pR\n", devno,
+ link->resource[0]);
+ DEBUGP(2, dev, "<- reader_config (succ)\n");
+
+ return 0;
+
+cs_release:
+ reader_release(link);
+ return -ENODEV;
+}
+
+static void reader_release(struct pcmcia_device *link)
+{
+ cm4040_reader_release(link);
+ pcmcia_disable_device(link);
+}
+
+static int reader_probe(struct pcmcia_device *link)
+{
+ struct reader_dev *dev;
+ int i, ret;
+
+ for (i = 0; i < CM_MAX_DEV; i++) {
+ if (dev_table[i] == NULL)
+ break;
+ }
+
+ if (i == CM_MAX_DEV)
+ return -ENODEV;
+
+ dev = kzalloc(sizeof(struct reader_dev), GFP_KERNEL);
+ if (dev == NULL)
+ return -ENOMEM;
+
+ dev->timeout = CCID_DRIVER_MINIMUM_TIMEOUT;
+ dev->buffer_status = 0;
+
+ link->priv = dev;
+ dev->p_dev = link;
+
+ dev_table[i] = link;
+
+ init_waitqueue_head(&dev->devq);
+ init_waitqueue_head(&dev->poll_wait);
+ init_waitqueue_head(&dev->read_wait);
+ init_waitqueue_head(&dev->write_wait);
+ timer_setup(&dev->poll_timer, cm4040_do_poll, 0);
+
+ ret = reader_config(link, i);
+ if (ret) {
+ dev_table[i] = NULL;
+ kfree(dev);
+ return ret;
+ }
+
+ device_create(cmx_class, NULL, MKDEV(major, i), NULL, "cmx%d", i);
+
+ return 0;
+}
+
+static void reader_detach(struct pcmcia_device *link)
+{
+ struct reader_dev *dev = link->priv;
+ int devno;
+
+ /* find device */
+ for (devno = 0; devno < CM_MAX_DEV; devno++) {
+ if (dev_table[devno] == link)
+ break;
+ }
+ if (devno == CM_MAX_DEV)
+ return;
+
+ reader_release(link);
+
+ dev_table[devno] = NULL;
+ kfree(dev);
+
+ device_destroy(cmx_class, MKDEV(major, devno));
+
+ return;
+}
+
+static const struct file_operations reader_fops = {
+ .owner = THIS_MODULE,
+ .read = cm4040_read,
+ .write = cm4040_write,
+ .open = cm4040_open,
+ .release = cm4040_close,
+ .poll = cm4040_poll,
+ .llseek = no_llseek,
+};
+
+static const struct pcmcia_device_id cm4040_ids[] = {
+ PCMCIA_DEVICE_MANF_CARD(0x0223, 0x0200),
+ PCMCIA_DEVICE_PROD_ID12("OMNIKEY", "CardMan 4040",
+ 0xE32CDD8C, 0x8F23318B),
+ PCMCIA_DEVICE_NULL,
+};
+MODULE_DEVICE_TABLE(pcmcia, cm4040_ids);
+
+static struct pcmcia_driver reader_driver = {
+ .owner = THIS_MODULE,
+ .name = "cm4040_cs",
+ .probe = reader_probe,
+ .remove = reader_detach,
+ .id_table = cm4040_ids,
+};
+
+static int __init cm4040_init(void)
+{
+ int rc;
+
+ cmx_class = class_create(THIS_MODULE, "cardman_4040");
+ if (IS_ERR(cmx_class))
+ return PTR_ERR(cmx_class);
+
+ major = register_chrdev(0, DEVICE_NAME, &reader_fops);
+ if (major < 0) {
+ printk(KERN_WARNING MODULE_NAME
+ ": could not get major number\n");
+ class_destroy(cmx_class);
+ return major;
+ }
+
+ rc = pcmcia_register_driver(&reader_driver);
+ if (rc < 0) {
+ unregister_chrdev(major, DEVICE_NAME);
+ class_destroy(cmx_class);
+ return rc;
+ }
+
+ return 0;
+}
+
+static void __exit cm4040_exit(void)
+{
+ pcmcia_unregister_driver(&reader_driver);
+ unregister_chrdev(major, DEVICE_NAME);
+ class_destroy(cmx_class);
+}
+
+module_init(cm4040_init);
+module_exit(cm4040_exit);
+MODULE_LICENSE("Dual BSD/GPL");
diff --git a/drivers/char/pcmcia/cm4040_cs.h b/drivers/char/pcmcia/cm4040_cs.h
new file mode 100644
index 000000000..e2ffff995
--- /dev/null
+++ b/drivers/char/pcmcia/cm4040_cs.h
@@ -0,0 +1,48 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _CM4040_H_
+#define _CM4040_H_
+
+#define CM_MAX_DEV 4
+
+#define DEVICE_NAME "cmx"
+#define MODULE_NAME "cm4040_cs"
+
+#define REG_OFFSET_BULK_OUT 0
+#define REG_OFFSET_BULK_IN 0
+#define REG_OFFSET_BUFFER_STATUS 1
+#define REG_OFFSET_SYNC_CONTROL 2
+
+#define BSR_BULK_IN_FULL 0x02
+#define BSR_BULK_OUT_FULL 0x01
+
+#define SCR_HOST_TO_READER_START 0x80
+#define SCR_ABORT 0x40
+#define SCR_EN_NOTIFY 0x20
+#define SCR_ACK_NOTIFY 0x10
+#define SCR_READER_TO_HOST_DONE 0x08
+#define SCR_HOST_TO_READER_DONE 0x04
+#define SCR_PULSE_INTERRUPT 0x02
+#define SCR_POWER_DOWN 0x01
+
+
+#define CMD_PC_TO_RDR_ICCPOWERON 0x62
+#define CMD_PC_TO_RDR_GETSLOTSTATUS 0x65
+#define CMD_PC_TO_RDR_ICCPOWEROFF 0x63
+#define CMD_PC_TO_RDR_SECURE 0x69
+#define CMD_PC_TO_RDR_GETPARAMETERS 0x6C
+#define CMD_PC_TO_RDR_RESETPARAMETERS 0x6D
+#define CMD_PC_TO_RDR_SETPARAMETERS 0x61
+#define CMD_PC_TO_RDR_XFRBLOCK 0x6F
+#define CMD_PC_TO_RDR_ESCAPE 0x6B
+#define CMD_PC_TO_RDR_ICCCLOCK 0x6E
+#define CMD_PC_TO_RDR_TEST_SECURE 0x74
+#define CMD_PC_TO_RDR_OK_SECURE 0x89
+
+
+#define CMD_RDR_TO_PC_SLOTSTATUS 0x81
+#define CMD_RDR_TO_PC_DATABLOCK 0x80
+#define CMD_RDR_TO_PC_PARAMETERS 0x82
+#define CMD_RDR_TO_PC_ESCAPE 0x83
+#define CMD_RDR_TO_PC_OK_SECURE 0x89
+
+#endif /* _CM4040_H_ */
diff --git a/drivers/char/pcmcia/scr24x_cs.c b/drivers/char/pcmcia/scr24x_cs.c
new file mode 100644
index 000000000..1bdce08fa
--- /dev/null
+++ b/drivers/char/pcmcia/scr24x_cs.c
@@ -0,0 +1,359 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * SCR24x PCMCIA Smart Card Reader Driver
+ *
+ * Copyright (C) 2005-2006 TL Sudheendran
+ * Copyright (C) 2016 Lubomir Rintel
+ *
+ * Derived from "scr24x_v4.2.6_Release.tar.gz" driver by TL Sudheendran.
+ */
+
+#include <linux/device.h>
+#include <linux/module.h>
+#include <linux/delay.h>
+#include <linux/cdev.h>
+#include <linux/slab.h>
+#include <linux/fs.h>
+#include <linux/io.h>
+#include <linux/uaccess.h>
+
+#include <pcmcia/cistpl.h>
+#include <pcmcia/ds.h>
+
+#define CCID_HEADER_SIZE 10
+#define CCID_LENGTH_OFFSET 1
+#define CCID_MAX_LEN 271
+
+#define SCR24X_DATA(n) (1 + n)
+#define SCR24X_CMD_STATUS 7
+#define CMD_START 0x40
+#define CMD_WRITE_BYTE 0x41
+#define CMD_READ_BYTE 0x42
+#define STATUS_BUSY 0x80
+
+struct scr24x_dev {
+ struct device *dev;
+ struct cdev c_dev;
+ unsigned char buf[CCID_MAX_LEN];
+ int devno;
+ struct mutex lock;
+ struct kref refcnt;
+ u8 __iomem *regs;
+};
+
+#define SCR24X_DEVS 8
+static DECLARE_BITMAP(scr24x_minors, SCR24X_DEVS);
+
+static struct class *scr24x_class;
+static dev_t scr24x_devt;
+
+static void scr24x_delete(struct kref *kref)
+{
+ struct scr24x_dev *dev = container_of(kref, struct scr24x_dev,
+ refcnt);
+
+ kfree(dev);
+}
+
+static int scr24x_wait_ready(struct scr24x_dev *dev)
+{
+ u_char status;
+ int timeout = 100;
+
+ do {
+ status = ioread8(dev->regs + SCR24X_CMD_STATUS);
+ if (!(status & STATUS_BUSY))
+ return 0;
+
+ msleep(20);
+ } while (--timeout);
+
+ return -EIO;
+}
+
+static int scr24x_open(struct inode *inode, struct file *filp)
+{
+ struct scr24x_dev *dev = container_of(inode->i_cdev,
+ struct scr24x_dev, c_dev);
+
+ kref_get(&dev->refcnt);
+ filp->private_data = dev;
+
+ return stream_open(inode, filp);
+}
+
+static int scr24x_release(struct inode *inode, struct file *filp)
+{
+ struct scr24x_dev *dev = filp->private_data;
+
+ /* We must not take the dev->lock here as scr24x_delete()
+ * might be called to remove the dev structure altogether.
+ * We don't need the lock anyway, since after the reference
+ * acquired in probe() is released in remove() the chrdev
+ * is already unregistered and noone can possibly acquire
+ * a reference via open() anymore. */
+ kref_put(&dev->refcnt, scr24x_delete);
+ return 0;
+}
+
+static int read_chunk(struct scr24x_dev *dev, size_t offset, size_t limit)
+{
+ size_t i, y;
+ int ret;
+
+ for (i = offset; i < limit; i += 5) {
+ iowrite8(CMD_READ_BYTE, dev->regs + SCR24X_CMD_STATUS);
+ ret = scr24x_wait_ready(dev);
+ if (ret < 0)
+ return ret;
+
+ for (y = 0; y < 5 && i + y < limit; y++)
+ dev->buf[i + y] = ioread8(dev->regs + SCR24X_DATA(y));
+ }
+
+ return 0;
+}
+
+static ssize_t scr24x_read(struct file *filp, char __user *buf, size_t count,
+ loff_t *ppos)
+{
+ struct scr24x_dev *dev = filp->private_data;
+ int ret;
+ int len;
+
+ if (count < CCID_HEADER_SIZE)
+ return -EINVAL;
+
+ if (mutex_lock_interruptible(&dev->lock))
+ return -ERESTARTSYS;
+
+ if (!dev->dev) {
+ ret = -ENODEV;
+ goto out;
+ }
+
+ ret = scr24x_wait_ready(dev);
+ if (ret < 0)
+ goto out;
+ len = CCID_HEADER_SIZE;
+ ret = read_chunk(dev, 0, len);
+ if (ret < 0)
+ goto out;
+
+ len += le32_to_cpu(*(__le32 *)(&dev->buf[CCID_LENGTH_OFFSET]));
+ if (len > sizeof(dev->buf)) {
+ ret = -EIO;
+ goto out;
+ }
+ ret = read_chunk(dev, CCID_HEADER_SIZE, len);
+ if (ret < 0)
+ goto out;
+
+ if (len < count)
+ count = len;
+
+ if (copy_to_user(buf, dev->buf, count)) {
+ ret = -EFAULT;
+ goto out;
+ }
+
+ ret = count;
+out:
+ mutex_unlock(&dev->lock);
+ return ret;
+}
+
+static ssize_t scr24x_write(struct file *filp, const char __user *buf,
+ size_t count, loff_t *ppos)
+{
+ struct scr24x_dev *dev = filp->private_data;
+ size_t i, y;
+ int ret;
+
+ if (mutex_lock_interruptible(&dev->lock))
+ return -ERESTARTSYS;
+
+ if (!dev->dev) {
+ ret = -ENODEV;
+ goto out;
+ }
+
+ if (count > sizeof(dev->buf)) {
+ ret = -EINVAL;
+ goto out;
+ }
+
+ if (copy_from_user(dev->buf, buf, count)) {
+ ret = -EFAULT;
+ goto out;
+ }
+
+ ret = scr24x_wait_ready(dev);
+ if (ret < 0)
+ goto out;
+
+ iowrite8(CMD_START, dev->regs + SCR24X_CMD_STATUS);
+ ret = scr24x_wait_ready(dev);
+ if (ret < 0)
+ goto out;
+
+ for (i = 0; i < count; i += 5) {
+ for (y = 0; y < 5 && i + y < count; y++)
+ iowrite8(dev->buf[i + y], dev->regs + SCR24X_DATA(y));
+
+ iowrite8(CMD_WRITE_BYTE, dev->regs + SCR24X_CMD_STATUS);
+ ret = scr24x_wait_ready(dev);
+ if (ret < 0)
+ goto out;
+ }
+
+ ret = count;
+out:
+ mutex_unlock(&dev->lock);
+ return ret;
+}
+
+static const struct file_operations scr24x_fops = {
+ .owner = THIS_MODULE,
+ .read = scr24x_read,
+ .write = scr24x_write,
+ .open = scr24x_open,
+ .release = scr24x_release,
+ .llseek = no_llseek,
+};
+
+static int scr24x_config_check(struct pcmcia_device *link, void *priv_data)
+{
+ if (resource_size(link->resource[PCMCIA_IOPORT_0]) != 0x11)
+ return -ENODEV;
+ return pcmcia_request_io(link);
+}
+
+static int scr24x_probe(struct pcmcia_device *link)
+{
+ struct scr24x_dev *dev;
+ int ret;
+
+ dev = kzalloc(sizeof(*dev), GFP_KERNEL);
+ if (!dev)
+ return -ENOMEM;
+
+ dev->devno = find_first_zero_bit(scr24x_minors, SCR24X_DEVS);
+ if (dev->devno >= SCR24X_DEVS) {
+ ret = -EBUSY;
+ goto err;
+ }
+
+ mutex_init(&dev->lock);
+ kref_init(&dev->refcnt);
+
+ link->priv = dev;
+ link->config_flags |= CONF_ENABLE_IRQ | CONF_AUTO_SET_IO;
+
+ ret = pcmcia_loop_config(link, scr24x_config_check, NULL);
+ if (ret < 0)
+ goto err;
+
+ dev->dev = &link->dev;
+ dev->regs = devm_ioport_map(&link->dev,
+ link->resource[PCMCIA_IOPORT_0]->start,
+ resource_size(link->resource[PCMCIA_IOPORT_0]));
+ if (!dev->regs) {
+ ret = -EIO;
+ goto err;
+ }
+
+ cdev_init(&dev->c_dev, &scr24x_fops);
+ dev->c_dev.owner = THIS_MODULE;
+ ret = cdev_add(&dev->c_dev, MKDEV(MAJOR(scr24x_devt), dev->devno), 1);
+ if (ret < 0)
+ goto err;
+
+ ret = pcmcia_enable_device(link);
+ if (ret < 0) {
+ pcmcia_disable_device(link);
+ goto err;
+ }
+
+ device_create(scr24x_class, NULL, MKDEV(MAJOR(scr24x_devt), dev->devno),
+ NULL, "scr24x%d", dev->devno);
+
+ dev_info(&link->dev, "SCR24x Chip Card Interface\n");
+ return 0;
+
+err:
+ if (dev->devno < SCR24X_DEVS)
+ clear_bit(dev->devno, scr24x_minors);
+ kfree (dev);
+ return ret;
+}
+
+static void scr24x_remove(struct pcmcia_device *link)
+{
+ struct scr24x_dev *dev = (struct scr24x_dev *)link->priv;
+
+ device_destroy(scr24x_class, MKDEV(MAJOR(scr24x_devt), dev->devno));
+ mutex_lock(&dev->lock);
+ pcmcia_disable_device(link);
+ cdev_del(&dev->c_dev);
+ clear_bit(dev->devno, scr24x_minors);
+ dev->dev = NULL;
+ mutex_unlock(&dev->lock);
+
+ kref_put(&dev->refcnt, scr24x_delete);
+}
+
+static const struct pcmcia_device_id scr24x_ids[] = {
+ PCMCIA_DEVICE_PROD_ID12("HP", "PC Card Smart Card Reader",
+ 0x53cb94f9, 0xbfdf89a5),
+ PCMCIA_DEVICE_PROD_ID1("SCR241 PCMCIA", 0x6271efa3),
+ PCMCIA_DEVICE_PROD_ID1("SCR243 PCMCIA", 0x2054e8de),
+ PCMCIA_DEVICE_PROD_ID1("SCR24x PCMCIA", 0x54a33665),
+ PCMCIA_DEVICE_NULL
+};
+MODULE_DEVICE_TABLE(pcmcia, scr24x_ids);
+
+static struct pcmcia_driver scr24x_driver = {
+ .owner = THIS_MODULE,
+ .name = "scr24x_cs",
+ .probe = scr24x_probe,
+ .remove = scr24x_remove,
+ .id_table = scr24x_ids,
+};
+
+static int __init scr24x_init(void)
+{
+ int ret;
+
+ scr24x_class = class_create(THIS_MODULE, "scr24x");
+ if (IS_ERR(scr24x_class))
+ return PTR_ERR(scr24x_class);
+
+ ret = alloc_chrdev_region(&scr24x_devt, 0, SCR24X_DEVS, "scr24x");
+ if (ret < 0) {
+ class_destroy(scr24x_class);
+ return ret;
+ }
+
+ ret = pcmcia_register_driver(&scr24x_driver);
+ if (ret < 0) {
+ unregister_chrdev_region(scr24x_devt, SCR24X_DEVS);
+ class_destroy(scr24x_class);
+ }
+
+ return ret;
+}
+
+static void __exit scr24x_exit(void)
+{
+ pcmcia_unregister_driver(&scr24x_driver);
+ unregister_chrdev_region(scr24x_devt, SCR24X_DEVS);
+ class_destroy(scr24x_class);
+}
+
+module_init(scr24x_init);
+module_exit(scr24x_exit);
+
+MODULE_AUTHOR("Lubomir Rintel");
+MODULE_DESCRIPTION("SCR24x PCMCIA Smart Card Reader Driver");
+MODULE_LICENSE("GPL");
diff --git a/drivers/char/pcmcia/synclink_cs.c b/drivers/char/pcmcia/synclink_cs.c
new file mode 100644
index 000000000..b2735be81
--- /dev/null
+++ b/drivers/char/pcmcia/synclink_cs.c
@@ -0,0 +1,4292 @@
+/*
+ * linux/drivers/char/pcmcia/synclink_cs.c
+ *
+ * $Id: synclink_cs.c,v 4.34 2005/09/08 13:20:54 paulkf Exp $
+ *
+ * Device driver for Microgate SyncLink PC Card
+ * multiprotocol serial adapter.
+ *
+ * written by Paul Fulghum for Microgate Corporation
+ * paulkf@microgate.com
+ *
+ * Microgate and SyncLink are trademarks of Microgate Corporation
+ *
+ * This code is released under the GNU General Public License (GPL)
+ *
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
+ * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
+ * OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#define VERSION(ver,rel,seq) (((ver)<<16) | ((rel)<<8) | (seq))
+#if defined(__i386__)
+# define BREAKPOINT() asm(" int $3");
+#else
+# define BREAKPOINT() { }
+#endif
+
+#define MAX_DEVICE_COUNT 4
+
+#include <linux/module.h>
+#include <linux/errno.h>
+#include <linux/signal.h>
+#include <linux/sched.h>
+#include <linux/timer.h>
+#include <linux/time.h>
+#include <linux/interrupt.h>
+#include <linux/tty.h>
+#include <linux/tty_flip.h>
+#include <linux/serial.h>
+#include <linux/major.h>
+#include <linux/string.h>
+#include <linux/fcntl.h>
+#include <linux/ptrace.h>
+#include <linux/ioport.h>
+#include <linux/mm.h>
+#include <linux/seq_file.h>
+#include <linux/slab.h>
+#include <linux/netdevice.h>
+#include <linux/vmalloc.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+#include <linux/ioctl.h>
+#include <linux/synclink.h>
+
+#include <asm/io.h>
+#include <asm/irq.h>
+#include <asm/dma.h>
+#include <linux/bitops.h>
+#include <asm/types.h>
+#include <linux/termios.h>
+#include <linux/workqueue.h>
+#include <linux/hdlc.h>
+
+#include <pcmcia/cistpl.h>
+#include <pcmcia/cisreg.h>
+#include <pcmcia/ds.h>
+
+#if defined(CONFIG_HDLC) || (defined(CONFIG_HDLC_MODULE) && defined(CONFIG_SYNCLINK_CS_MODULE))
+#define SYNCLINK_GENERIC_HDLC 1
+#else
+#define SYNCLINK_GENERIC_HDLC 0
+#endif
+
+#define GET_USER(error,value,addr) error = get_user(value,addr)
+#define COPY_FROM_USER(error,dest,src,size) error = copy_from_user(dest,src,size) ? -EFAULT : 0
+#define PUT_USER(error,value,addr) error = put_user(value,addr)
+#define COPY_TO_USER(error,dest,src,size) error = copy_to_user(dest,src,size) ? -EFAULT : 0
+
+#include <linux/uaccess.h>
+
+static MGSL_PARAMS default_params = {
+ MGSL_MODE_HDLC, /* unsigned long mode */
+ 0, /* unsigned char loopback; */
+ HDLC_FLAG_UNDERRUN_ABORT15, /* unsigned short flags; */
+ HDLC_ENCODING_NRZI_SPACE, /* unsigned char encoding; */
+ 0, /* unsigned long clock_speed; */
+ 0xff, /* unsigned char addr_filter; */
+ HDLC_CRC_16_CCITT, /* unsigned short crc_type; */
+ HDLC_PREAMBLE_LENGTH_8BITS, /* unsigned char preamble_length; */
+ HDLC_PREAMBLE_PATTERN_NONE, /* unsigned char preamble; */
+ 9600, /* unsigned long data_rate; */
+ 8, /* unsigned char data_bits; */
+ 1, /* unsigned char stop_bits; */
+ ASYNC_PARITY_NONE /* unsigned char parity; */
+};
+
+typedef struct {
+ int count;
+ unsigned char status;
+ char data[1];
+} RXBUF;
+
+/* The queue of BH actions to be performed */
+
+#define BH_RECEIVE 1
+#define BH_TRANSMIT 2
+#define BH_STATUS 4
+
+#define IO_PIN_SHUTDOWN_LIMIT 100
+
+#define RELEVANT_IFLAG(iflag) (iflag & (IGNBRK|BRKINT|IGNPAR|PARMRK|INPCK))
+
+struct _input_signal_events {
+ int ri_up;
+ int ri_down;
+ int dsr_up;
+ int dsr_down;
+ int dcd_up;
+ int dcd_down;
+ int cts_up;
+ int cts_down;
+};
+
+
+/*
+ * Device instance data structure
+ */
+
+typedef struct _mgslpc_info {
+ struct tty_port port;
+ void *if_ptr; /* General purpose pointer (used by SPPP) */
+ int magic;
+ int line;
+
+ struct mgsl_icount icount;
+
+ int timeout;
+ int x_char; /* xon/xoff character */
+ unsigned char read_status_mask;
+ unsigned char ignore_status_mask;
+
+ unsigned char *tx_buf;
+ int tx_put;
+ int tx_get;
+ int tx_count;
+
+ /* circular list of fixed length rx buffers */
+
+ unsigned char *rx_buf; /* memory allocated for all rx buffers */
+ int rx_buf_total_size; /* size of memory allocated for rx buffers */
+ int rx_put; /* index of next empty rx buffer */
+ int rx_get; /* index of next full rx buffer */
+ int rx_buf_size; /* size in bytes of single rx buffer */
+ int rx_buf_count; /* total number of rx buffers */
+ int rx_frame_count; /* number of full rx buffers */
+
+ wait_queue_head_t status_event_wait_q;
+ wait_queue_head_t event_wait_q;
+ struct timer_list tx_timer; /* HDLC transmit timeout timer */
+ struct _mgslpc_info *next_device; /* device list link */
+
+ unsigned short imra_value;
+ unsigned short imrb_value;
+ unsigned char pim_value;
+
+ spinlock_t lock;
+ struct work_struct task; /* task structure for scheduling bh */
+
+ u32 max_frame_size;
+
+ u32 pending_bh;
+
+ bool bh_running;
+ bool bh_requested;
+
+ int dcd_chkcount; /* check counts to prevent */
+ int cts_chkcount; /* too many IRQs if a signal */
+ int dsr_chkcount; /* is floating */
+ int ri_chkcount;
+
+ bool rx_enabled;
+ bool rx_overflow;
+
+ bool tx_enabled;
+ bool tx_active;
+ bool tx_aborting;
+ u32 idle_mode;
+
+ int if_mode; /* serial interface selection (RS-232, v.35 etc) */
+
+ char device_name[25]; /* device instance name */
+
+ unsigned int io_base; /* base I/O address of adapter */
+ unsigned int irq_level;
+
+ MGSL_PARAMS params; /* communications parameters */
+
+ unsigned char serial_signals; /* current serial signal states */
+
+ bool irq_occurred; /* for diagnostics use */
+ char testing_irq;
+ unsigned int init_error; /* startup error (DIAGS) */
+
+ char *flag_buf;
+ bool drop_rts_on_tx_done;
+
+ struct _input_signal_events input_signal_events;
+
+ /* PCMCIA support */
+ struct pcmcia_device *p_dev;
+ int stop;
+
+ /* SPPP/Cisco HDLC device parts */
+ int netcount;
+ spinlock_t netlock;
+
+#if SYNCLINK_GENERIC_HDLC
+ struct net_device *netdev;
+#endif
+
+} MGSLPC_INFO;
+
+#define MGSLPC_MAGIC 0x5402
+
+/*
+ * The size of the serial xmit buffer is 1 page, or 4096 bytes
+ */
+#define TXBUFSIZE 4096
+
+
+#define CHA 0x00 /* channel A offset */
+#define CHB 0x40 /* channel B offset */
+
+/*
+ * FIXME: PPC has PVR defined in asm/reg.h. For now we just undef it.
+ */
+#undef PVR
+
+#define RXFIFO 0
+#define TXFIFO 0
+#define STAR 0x20
+#define CMDR 0x20
+#define RSTA 0x21
+#define PRE 0x21
+#define MODE 0x22
+#define TIMR 0x23
+#define XAD1 0x24
+#define XAD2 0x25
+#define RAH1 0x26
+#define RAH2 0x27
+#define DAFO 0x27
+#define RAL1 0x28
+#define RFC 0x28
+#define RHCR 0x29
+#define RAL2 0x29
+#define RBCL 0x2a
+#define XBCL 0x2a
+#define RBCH 0x2b
+#define XBCH 0x2b
+#define CCR0 0x2c
+#define CCR1 0x2d
+#define CCR2 0x2e
+#define CCR3 0x2f
+#define VSTR 0x34
+#define BGR 0x34
+#define RLCR 0x35
+#define AML 0x36
+#define AMH 0x37
+#define GIS 0x38
+#define IVA 0x38
+#define IPC 0x39
+#define ISR 0x3a
+#define IMR 0x3a
+#define PVR 0x3c
+#define PIS 0x3d
+#define PIM 0x3d
+#define PCR 0x3e
+#define CCR4 0x3f
+
+// IMR/ISR
+
+#define IRQ_BREAK_ON BIT15 // rx break detected
+#define IRQ_DATAOVERRUN BIT14 // receive data overflow
+#define IRQ_ALLSENT BIT13 // all sent
+#define IRQ_UNDERRUN BIT12 // transmit data underrun
+#define IRQ_TIMER BIT11 // timer interrupt
+#define IRQ_CTS BIT10 // CTS status change
+#define IRQ_TXREPEAT BIT9 // tx message repeat
+#define IRQ_TXFIFO BIT8 // transmit pool ready
+#define IRQ_RXEOM BIT7 // receive message end
+#define IRQ_EXITHUNT BIT6 // receive frame start
+#define IRQ_RXTIME BIT6 // rx char timeout
+#define IRQ_DCD BIT2 // carrier detect status change
+#define IRQ_OVERRUN BIT1 // receive frame overflow
+#define IRQ_RXFIFO BIT0 // receive pool full
+
+// STAR
+
+#define XFW BIT6 // transmit FIFO write enable
+#define CEC BIT2 // command executing
+#define CTS BIT1 // CTS state
+
+#define PVR_DTR BIT0
+#define PVR_DSR BIT1
+#define PVR_RI BIT2
+#define PVR_AUTOCTS BIT3
+#define PVR_RS232 0x20 /* 0010b */
+#define PVR_V35 0xe0 /* 1110b */
+#define PVR_RS422 0x40 /* 0100b */
+
+/* Register access functions */
+
+#define write_reg(info, reg, val) outb((val),(info)->io_base + (reg))
+#define read_reg(info, reg) inb((info)->io_base + (reg))
+
+#define read_reg16(info, reg) inw((info)->io_base + (reg))
+#define write_reg16(info, reg, val) outw((val), (info)->io_base + (reg))
+
+#define set_reg_bits(info, reg, mask) \
+ write_reg(info, (reg), \
+ (unsigned char) (read_reg(info, (reg)) | (mask)))
+#define clear_reg_bits(info, reg, mask) \
+ write_reg(info, (reg), \
+ (unsigned char) (read_reg(info, (reg)) & ~(mask)))
+/*
+ * interrupt enable/disable routines
+ */
+static void irq_disable(MGSLPC_INFO *info, unsigned char channel, unsigned short mask)
+{
+ if (channel == CHA) {
+ info->imra_value |= mask;
+ write_reg16(info, CHA + IMR, info->imra_value);
+ } else {
+ info->imrb_value |= mask;
+ write_reg16(info, CHB + IMR, info->imrb_value);
+ }
+}
+static void irq_enable(MGSLPC_INFO *info, unsigned char channel, unsigned short mask)
+{
+ if (channel == CHA) {
+ info->imra_value &= ~mask;
+ write_reg16(info, CHA + IMR, info->imra_value);
+ } else {
+ info->imrb_value &= ~mask;
+ write_reg16(info, CHB + IMR, info->imrb_value);
+ }
+}
+
+#define port_irq_disable(info, mask) \
+ { info->pim_value |= (mask); write_reg(info, PIM, info->pim_value); }
+
+#define port_irq_enable(info, mask) \
+ { info->pim_value &= ~(mask); write_reg(info, PIM, info->pim_value); }
+
+static void rx_start(MGSLPC_INFO *info);
+static void rx_stop(MGSLPC_INFO *info);
+
+static void tx_start(MGSLPC_INFO *info, struct tty_struct *tty);
+static void tx_stop(MGSLPC_INFO *info);
+static void tx_set_idle(MGSLPC_INFO *info);
+
+static void get_signals(MGSLPC_INFO *info);
+static void set_signals(MGSLPC_INFO *info);
+
+static void reset_device(MGSLPC_INFO *info);
+
+static void hdlc_mode(MGSLPC_INFO *info);
+static void async_mode(MGSLPC_INFO *info);
+
+static void tx_timeout(struct timer_list *t);
+
+static int carrier_raised(struct tty_port *port);
+static void dtr_rts(struct tty_port *port, int onoff);
+
+#if SYNCLINK_GENERIC_HDLC
+#define dev_to_port(D) (dev_to_hdlc(D)->priv)
+static void hdlcdev_tx_done(MGSLPC_INFO *info);
+static void hdlcdev_rx(MGSLPC_INFO *info, char *buf, int size);
+static int hdlcdev_init(MGSLPC_INFO *info);
+static void hdlcdev_exit(MGSLPC_INFO *info);
+#endif
+
+static void trace_block(MGSLPC_INFO *info,const char* data, int count, int xmit);
+
+static bool register_test(MGSLPC_INFO *info);
+static bool irq_test(MGSLPC_INFO *info);
+static int adapter_test(MGSLPC_INFO *info);
+
+static int claim_resources(MGSLPC_INFO *info);
+static void release_resources(MGSLPC_INFO *info);
+static int mgslpc_add_device(MGSLPC_INFO *info);
+static void mgslpc_remove_device(MGSLPC_INFO *info);
+
+static bool rx_get_frame(MGSLPC_INFO *info, struct tty_struct *tty);
+static void rx_reset_buffers(MGSLPC_INFO *info);
+static int rx_alloc_buffers(MGSLPC_INFO *info);
+static void rx_free_buffers(MGSLPC_INFO *info);
+
+static irqreturn_t mgslpc_isr(int irq, void *dev_id);
+
+/*
+ * Bottom half interrupt handlers
+ */
+static void bh_handler(struct work_struct *work);
+static void bh_transmit(MGSLPC_INFO *info, struct tty_struct *tty);
+static void bh_status(MGSLPC_INFO *info);
+
+/*
+ * ioctl handlers
+ */
+static int tiocmget(struct tty_struct *tty);
+static int tiocmset(struct tty_struct *tty,
+ unsigned int set, unsigned int clear);
+static int get_stats(MGSLPC_INFO *info, struct mgsl_icount __user *user_icount);
+static int get_params(MGSLPC_INFO *info, MGSL_PARAMS __user *user_params);
+static int set_params(MGSLPC_INFO *info, MGSL_PARAMS __user *new_params, struct tty_struct *tty);
+static int get_txidle(MGSLPC_INFO *info, int __user *idle_mode);
+static int set_txidle(MGSLPC_INFO *info, int idle_mode);
+static int set_txenable(MGSLPC_INFO *info, int enable, struct tty_struct *tty);
+static int tx_abort(MGSLPC_INFO *info);
+static int set_rxenable(MGSLPC_INFO *info, int enable);
+static int wait_events(MGSLPC_INFO *info, int __user *mask);
+
+static MGSLPC_INFO *mgslpc_device_list = NULL;
+static int mgslpc_device_count = 0;
+
+/*
+ * Set this param to non-zero to load eax with the
+ * .text section address and breakpoint on module load.
+ * This is useful for use with gdb and add-symbol-file command.
+ */
+static bool break_on_load;
+
+/*
+ * Driver major number, defaults to zero to get auto
+ * assigned major number. May be forced as module parameter.
+ */
+static int ttymajor=0;
+
+static int debug_level = 0;
+static int maxframe[MAX_DEVICE_COUNT] = {0,};
+
+module_param(break_on_load, bool, 0);
+module_param(ttymajor, int, 0);
+module_param(debug_level, int, 0);
+module_param_array(maxframe, int, NULL, 0);
+
+MODULE_LICENSE("GPL");
+
+static char *driver_name = "SyncLink PC Card driver";
+static char *driver_version = "$Revision: 4.34 $";
+
+static struct tty_driver *serial_driver;
+
+/* number of characters left in xmit buffer before we ask for more */
+#define WAKEUP_CHARS 256
+
+static void mgslpc_change_params(MGSLPC_INFO *info, struct tty_struct *tty);
+static void mgslpc_wait_until_sent(struct tty_struct *tty, int timeout);
+
+/* PCMCIA prototypes */
+
+static int mgslpc_config(struct pcmcia_device *link);
+static void mgslpc_release(u_long arg);
+static void mgslpc_detach(struct pcmcia_device *p_dev);
+
+/*
+ * 1st function defined in .text section. Calling this function in
+ * init_module() followed by a breakpoint allows a remote debugger
+ * (gdb) to get the .text address for the add-symbol-file command.
+ * This allows remote debugging of dynamically loadable modules.
+ */
+static void* mgslpc_get_text_ptr(void)
+{
+ return mgslpc_get_text_ptr;
+}
+
+/**
+ * line discipline callback wrappers
+ *
+ * The wrappers maintain line discipline references
+ * while calling into the line discipline.
+ *
+ * ldisc_receive_buf - pass receive data to line discipline
+ */
+
+static void ldisc_receive_buf(struct tty_struct *tty,
+ const __u8 *data, char *flags, int count)
+{
+ struct tty_ldisc *ld;
+ if (!tty)
+ return;
+ ld = tty_ldisc_ref(tty);
+ if (ld) {
+ if (ld->ops->receive_buf)
+ ld->ops->receive_buf(tty, data, flags, count);
+ tty_ldisc_deref(ld);
+ }
+}
+
+static const struct tty_port_operations mgslpc_port_ops = {
+ .carrier_raised = carrier_raised,
+ .dtr_rts = dtr_rts
+};
+
+static int mgslpc_probe(struct pcmcia_device *link)
+{
+ MGSLPC_INFO *info;
+ int ret;
+
+ if (debug_level >= DEBUG_LEVEL_INFO)
+ printk("mgslpc_attach\n");
+
+ info = kzalloc(sizeof(MGSLPC_INFO), GFP_KERNEL);
+ if (!info) {
+ printk("Error can't allocate device instance data\n");
+ return -ENOMEM;
+ }
+
+ info->magic = MGSLPC_MAGIC;
+ tty_port_init(&info->port);
+ info->port.ops = &mgslpc_port_ops;
+ INIT_WORK(&info->task, bh_handler);
+ info->max_frame_size = 4096;
+ init_waitqueue_head(&info->status_event_wait_q);
+ init_waitqueue_head(&info->event_wait_q);
+ spin_lock_init(&info->lock);
+ spin_lock_init(&info->netlock);
+ memcpy(&info->params,&default_params,sizeof(MGSL_PARAMS));
+ info->idle_mode = HDLC_TXIDLE_FLAGS;
+ info->imra_value = 0xffff;
+ info->imrb_value = 0xffff;
+ info->pim_value = 0xff;
+
+ info->p_dev = link;
+ link->priv = info;
+
+ /* Initialize the struct pcmcia_device structure */
+
+ ret = mgslpc_config(link);
+ if (ret != 0)
+ goto failed;
+
+ ret = mgslpc_add_device(info);
+ if (ret != 0)
+ goto failed_release;
+
+ return 0;
+
+failed_release:
+ mgslpc_release((u_long)link);
+failed:
+ tty_port_destroy(&info->port);
+ kfree(info);
+ return ret;
+}
+
+/* Card has been inserted.
+ */
+
+static int mgslpc_ioprobe(struct pcmcia_device *p_dev, void *priv_data)
+{
+ return pcmcia_request_io(p_dev);
+}
+
+static int mgslpc_config(struct pcmcia_device *link)
+{
+ MGSLPC_INFO *info = link->priv;
+ int ret;
+
+ if (debug_level >= DEBUG_LEVEL_INFO)
+ printk("mgslpc_config(0x%p)\n", link);
+
+ link->config_flags |= CONF_ENABLE_IRQ | CONF_AUTO_SET_IO;
+
+ ret = pcmcia_loop_config(link, mgslpc_ioprobe, NULL);
+ if (ret != 0)
+ goto failed;
+
+ link->config_index = 8;
+ link->config_regs = PRESENT_OPTION;
+
+ ret = pcmcia_request_irq(link, mgslpc_isr);
+ if (ret)
+ goto failed;
+ ret = pcmcia_enable_device(link);
+ if (ret)
+ goto failed;
+
+ info->io_base = link->resource[0]->start;
+ info->irq_level = link->irq;
+ return 0;
+
+failed:
+ mgslpc_release((u_long)link);
+ return -ENODEV;
+}
+
+/* Card has been removed.
+ * Unregister device and release PCMCIA configuration.
+ * If device is open, postpone until it is closed.
+ */
+static void mgslpc_release(u_long arg)
+{
+ struct pcmcia_device *link = (struct pcmcia_device *)arg;
+
+ if (debug_level >= DEBUG_LEVEL_INFO)
+ printk("mgslpc_release(0x%p)\n", link);
+
+ pcmcia_disable_device(link);
+}
+
+static void mgslpc_detach(struct pcmcia_device *link)
+{
+ if (debug_level >= DEBUG_LEVEL_INFO)
+ printk("mgslpc_detach(0x%p)\n", link);
+
+ ((MGSLPC_INFO *)link->priv)->stop = 1;
+ mgslpc_release((u_long)link);
+
+ mgslpc_remove_device((MGSLPC_INFO *)link->priv);
+}
+
+static int mgslpc_suspend(struct pcmcia_device *link)
+{
+ MGSLPC_INFO *info = link->priv;
+
+ info->stop = 1;
+
+ return 0;
+}
+
+static int mgslpc_resume(struct pcmcia_device *link)
+{
+ MGSLPC_INFO *info = link->priv;
+
+ info->stop = 0;
+
+ return 0;
+}
+
+
+static inline bool mgslpc_paranoia_check(MGSLPC_INFO *info,
+ char *name, const char *routine)
+{
+#ifdef MGSLPC_PARANOIA_CHECK
+ static const char *badmagic =
+ "Warning: bad magic number for mgsl struct (%s) in %s\n";
+ static const char *badinfo =
+ "Warning: null mgslpc_info for (%s) in %s\n";
+
+ if (!info) {
+ printk(badinfo, name, routine);
+ return true;
+ }
+ if (info->magic != MGSLPC_MAGIC) {
+ printk(badmagic, name, routine);
+ return true;
+ }
+#else
+ if (!info)
+ return true;
+#endif
+ return false;
+}
+
+
+#define CMD_RXFIFO BIT7 // release current rx FIFO
+#define CMD_RXRESET BIT6 // receiver reset
+#define CMD_RXFIFO_READ BIT5
+#define CMD_START_TIMER BIT4
+#define CMD_TXFIFO BIT3 // release current tx FIFO
+#define CMD_TXEOM BIT1 // transmit end message
+#define CMD_TXRESET BIT0 // transmit reset
+
+static bool wait_command_complete(MGSLPC_INFO *info, unsigned char channel)
+{
+ int i = 0;
+ /* wait for command completion */
+ while (read_reg(info, (unsigned char)(channel+STAR)) & BIT2) {
+ udelay(1);
+ if (i++ == 1000)
+ return false;
+ }
+ return true;
+}
+
+static void issue_command(MGSLPC_INFO *info, unsigned char channel, unsigned char cmd)
+{
+ wait_command_complete(info, channel);
+ write_reg(info, (unsigned char) (channel + CMDR), cmd);
+}
+
+static void tx_pause(struct tty_struct *tty)
+{
+ MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data;
+ unsigned long flags;
+
+ if (mgslpc_paranoia_check(info, tty->name, "tx_pause"))
+ return;
+ if (debug_level >= DEBUG_LEVEL_INFO)
+ printk("tx_pause(%s)\n", info->device_name);
+
+ spin_lock_irqsave(&info->lock, flags);
+ if (info->tx_enabled)
+ tx_stop(info);
+ spin_unlock_irqrestore(&info->lock, flags);
+}
+
+static void tx_release(struct tty_struct *tty)
+{
+ MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data;
+ unsigned long flags;
+
+ if (mgslpc_paranoia_check(info, tty->name, "tx_release"))
+ return;
+ if (debug_level >= DEBUG_LEVEL_INFO)
+ printk("tx_release(%s)\n", info->device_name);
+
+ spin_lock_irqsave(&info->lock, flags);
+ if (!info->tx_enabled)
+ tx_start(info, tty);
+ spin_unlock_irqrestore(&info->lock, flags);
+}
+
+/* Return next bottom half action to perform.
+ * or 0 if nothing to do.
+ */
+static int bh_action(MGSLPC_INFO *info)
+{
+ unsigned long flags;
+ int rc = 0;
+
+ spin_lock_irqsave(&info->lock, flags);
+
+ if (info->pending_bh & BH_RECEIVE) {
+ info->pending_bh &= ~BH_RECEIVE;
+ rc = BH_RECEIVE;
+ } else if (info->pending_bh & BH_TRANSMIT) {
+ info->pending_bh &= ~BH_TRANSMIT;
+ rc = BH_TRANSMIT;
+ } else if (info->pending_bh & BH_STATUS) {
+ info->pending_bh &= ~BH_STATUS;
+ rc = BH_STATUS;
+ }
+
+ if (!rc) {
+ /* Mark BH routine as complete */
+ info->bh_running = false;
+ info->bh_requested = false;
+ }
+
+ spin_unlock_irqrestore(&info->lock, flags);
+
+ return rc;
+}
+
+static void bh_handler(struct work_struct *work)
+{
+ MGSLPC_INFO *info = container_of(work, MGSLPC_INFO, task);
+ struct tty_struct *tty;
+ int action;
+
+ if (debug_level >= DEBUG_LEVEL_BH)
+ printk("%s(%d):bh_handler(%s) entry\n",
+ __FILE__,__LINE__,info->device_name);
+
+ info->bh_running = true;
+ tty = tty_port_tty_get(&info->port);
+
+ while((action = bh_action(info)) != 0) {
+
+ /* Process work item */
+ if (debug_level >= DEBUG_LEVEL_BH)
+ printk("%s(%d):bh_handler() work item action=%d\n",
+ __FILE__,__LINE__,action);
+
+ switch (action) {
+
+ case BH_RECEIVE:
+ while(rx_get_frame(info, tty));
+ break;
+ case BH_TRANSMIT:
+ bh_transmit(info, tty);
+ break;
+ case BH_STATUS:
+ bh_status(info);
+ break;
+ default:
+ /* unknown work item ID */
+ printk("Unknown work item ID=%08X!\n", action);
+ break;
+ }
+ }
+
+ tty_kref_put(tty);
+ if (debug_level >= DEBUG_LEVEL_BH)
+ printk("%s(%d):bh_handler(%s) exit\n",
+ __FILE__,__LINE__,info->device_name);
+}
+
+static void bh_transmit(MGSLPC_INFO *info, struct tty_struct *tty)
+{
+ if (debug_level >= DEBUG_LEVEL_BH)
+ printk("bh_transmit() entry on %s\n", info->device_name);
+
+ if (tty)
+ tty_wakeup(tty);
+}
+
+static void bh_status(MGSLPC_INFO *info)
+{
+ info->ri_chkcount = 0;
+ info->dsr_chkcount = 0;
+ info->dcd_chkcount = 0;
+ info->cts_chkcount = 0;
+}
+
+/* eom: non-zero = end of frame */
+static void rx_ready_hdlc(MGSLPC_INFO *info, int eom)
+{
+ unsigned char data[2];
+ unsigned char fifo_count, read_count, i;
+ RXBUF *buf = (RXBUF*)(info->rx_buf + (info->rx_put * info->rx_buf_size));
+
+ if (debug_level >= DEBUG_LEVEL_ISR)
+ printk("%s(%d):rx_ready_hdlc(eom=%d)\n", __FILE__, __LINE__, eom);
+
+ if (!info->rx_enabled)
+ return;
+
+ if (info->rx_frame_count >= info->rx_buf_count) {
+ /* no more free buffers */
+ issue_command(info, CHA, CMD_RXRESET);
+ info->pending_bh |= BH_RECEIVE;
+ info->rx_overflow = true;
+ info->icount.buf_overrun++;
+ return;
+ }
+
+ if (eom) {
+ /* end of frame, get FIFO count from RBCL register */
+ fifo_count = (unsigned char)(read_reg(info, CHA+RBCL) & 0x1f);
+ if (fifo_count == 0)
+ fifo_count = 32;
+ } else
+ fifo_count = 32;
+
+ do {
+ if (fifo_count == 1) {
+ read_count = 1;
+ data[0] = read_reg(info, CHA + RXFIFO);
+ } else {
+ read_count = 2;
+ *((unsigned short *) data) = read_reg16(info, CHA + RXFIFO);
+ }
+ fifo_count -= read_count;
+ if (!fifo_count && eom)
+ buf->status = data[--read_count];
+
+ for (i = 0; i < read_count; i++) {
+ if (buf->count >= info->max_frame_size) {
+ /* frame too large, reset receiver and reset current buffer */
+ issue_command(info, CHA, CMD_RXRESET);
+ buf->count = 0;
+ return;
+ }
+ *(buf->data + buf->count) = data[i];
+ buf->count++;
+ }
+ } while (fifo_count);
+
+ if (eom) {
+ info->pending_bh |= BH_RECEIVE;
+ info->rx_frame_count++;
+ info->rx_put++;
+ if (info->rx_put >= info->rx_buf_count)
+ info->rx_put = 0;
+ }
+ issue_command(info, CHA, CMD_RXFIFO);
+}
+
+static void rx_ready_async(MGSLPC_INFO *info, int tcd)
+{
+ struct tty_port *port = &info->port;
+ unsigned char data, status, flag;
+ int fifo_count;
+ int work = 0;
+ struct mgsl_icount *icount = &info->icount;
+
+ if (tcd) {
+ /* early termination, get FIFO count from RBCL register */
+ fifo_count = (unsigned char)(read_reg(info, CHA+RBCL) & 0x1f);
+
+ /* Zero fifo count could mean 0 or 32 bytes available.
+ * If BIT5 of STAR is set then at least 1 byte is available.
+ */
+ if (!fifo_count && (read_reg(info,CHA+STAR) & BIT5))
+ fifo_count = 32;
+ } else
+ fifo_count = 32;
+
+ tty_buffer_request_room(port, fifo_count);
+ /* Flush received async data to receive data buffer. */
+ while (fifo_count) {
+ data = read_reg(info, CHA + RXFIFO);
+ status = read_reg(info, CHA + RXFIFO);
+ fifo_count -= 2;
+
+ icount->rx++;
+ flag = TTY_NORMAL;
+
+ // if no frameing/crc error then save data
+ // BIT7:parity error
+ // BIT6:framing error
+
+ if (status & (BIT7 | BIT6)) {
+ if (status & BIT7)
+ icount->parity++;
+ else
+ icount->frame++;
+
+ /* discard char if tty control flags say so */
+ if (status & info->ignore_status_mask)
+ continue;
+
+ status &= info->read_status_mask;
+
+ if (status & BIT7)
+ flag = TTY_PARITY;
+ else if (status & BIT6)
+ flag = TTY_FRAME;
+ }
+ work += tty_insert_flip_char(port, data, flag);
+ }
+ issue_command(info, CHA, CMD_RXFIFO);
+
+ if (debug_level >= DEBUG_LEVEL_ISR) {
+ printk("%s(%d):rx_ready_async",
+ __FILE__,__LINE__);
+ printk("%s(%d):rx=%d brk=%d parity=%d frame=%d overrun=%d\n",
+ __FILE__,__LINE__,icount->rx,icount->brk,
+ icount->parity,icount->frame,icount->overrun);
+ }
+
+ if (work)
+ tty_flip_buffer_push(port);
+}
+
+
+static void tx_done(MGSLPC_INFO *info, struct tty_struct *tty)
+{
+ if (!info->tx_active)
+ return;
+
+ info->tx_active = false;
+ info->tx_aborting = false;
+
+ if (info->params.mode == MGSL_MODE_ASYNC)
+ return;
+
+ info->tx_count = info->tx_put = info->tx_get = 0;
+ del_timer(&info->tx_timer);
+
+ if (info->drop_rts_on_tx_done) {
+ get_signals(info);
+ if (info->serial_signals & SerialSignal_RTS) {
+ info->serial_signals &= ~SerialSignal_RTS;
+ set_signals(info);
+ }
+ info->drop_rts_on_tx_done = false;
+ }
+
+#if SYNCLINK_GENERIC_HDLC
+ if (info->netcount)
+ hdlcdev_tx_done(info);
+ else
+#endif
+ {
+ if (tty && (tty->flow.stopped || tty->hw_stopped)) {
+ tx_stop(info);
+ return;
+ }
+ info->pending_bh |= BH_TRANSMIT;
+ }
+}
+
+static void tx_ready(MGSLPC_INFO *info, struct tty_struct *tty)
+{
+ unsigned char fifo_count = 32;
+ int c;
+
+ if (debug_level >= DEBUG_LEVEL_ISR)
+ printk("%s(%d):tx_ready(%s)\n", __FILE__, __LINE__, info->device_name);
+
+ if (info->params.mode == MGSL_MODE_HDLC) {
+ if (!info->tx_active)
+ return;
+ } else {
+ if (tty && (tty->flow.stopped || tty->hw_stopped)) {
+ tx_stop(info);
+ return;
+ }
+ if (!info->tx_count)
+ info->tx_active = false;
+ }
+
+ if (!info->tx_count)
+ return;
+
+ while (info->tx_count && fifo_count) {
+ c = min(2, min_t(int, fifo_count, min(info->tx_count, TXBUFSIZE - info->tx_get)));
+
+ if (c == 1) {
+ write_reg(info, CHA + TXFIFO, *(info->tx_buf + info->tx_get));
+ } else {
+ write_reg16(info, CHA + TXFIFO,
+ *((unsigned short*)(info->tx_buf + info->tx_get)));
+ }
+ info->tx_count -= c;
+ info->tx_get = (info->tx_get + c) & (TXBUFSIZE - 1);
+ fifo_count -= c;
+ }
+
+ if (info->params.mode == MGSL_MODE_ASYNC) {
+ if (info->tx_count < WAKEUP_CHARS)
+ info->pending_bh |= BH_TRANSMIT;
+ issue_command(info, CHA, CMD_TXFIFO);
+ } else {
+ if (info->tx_count)
+ issue_command(info, CHA, CMD_TXFIFO);
+ else
+ issue_command(info, CHA, CMD_TXFIFO + CMD_TXEOM);
+ }
+}
+
+static void cts_change(MGSLPC_INFO *info, struct tty_struct *tty)
+{
+ get_signals(info);
+ if ((info->cts_chkcount)++ >= IO_PIN_SHUTDOWN_LIMIT)
+ irq_disable(info, CHB, IRQ_CTS);
+ info->icount.cts++;
+ if (info->serial_signals & SerialSignal_CTS)
+ info->input_signal_events.cts_up++;
+ else
+ info->input_signal_events.cts_down++;
+ wake_up_interruptible(&info->status_event_wait_q);
+ wake_up_interruptible(&info->event_wait_q);
+
+ if (tty && tty_port_cts_enabled(&info->port)) {
+ if (tty->hw_stopped) {
+ if (info->serial_signals & SerialSignal_CTS) {
+ if (debug_level >= DEBUG_LEVEL_ISR)
+ printk("CTS tx start...");
+ tty->hw_stopped = 0;
+ tx_start(info, tty);
+ info->pending_bh |= BH_TRANSMIT;
+ return;
+ }
+ } else {
+ if (!(info->serial_signals & SerialSignal_CTS)) {
+ if (debug_level >= DEBUG_LEVEL_ISR)
+ printk("CTS tx stop...");
+ tty->hw_stopped = 1;
+ tx_stop(info);
+ }
+ }
+ }
+ info->pending_bh |= BH_STATUS;
+}
+
+static void dcd_change(MGSLPC_INFO *info, struct tty_struct *tty)
+{
+ get_signals(info);
+ if ((info->dcd_chkcount)++ >= IO_PIN_SHUTDOWN_LIMIT)
+ irq_disable(info, CHB, IRQ_DCD);
+ info->icount.dcd++;
+ if (info->serial_signals & SerialSignal_DCD) {
+ info->input_signal_events.dcd_up++;
+ }
+ else
+ info->input_signal_events.dcd_down++;
+#if SYNCLINK_GENERIC_HDLC
+ if (info->netcount) {
+ if (info->serial_signals & SerialSignal_DCD)
+ netif_carrier_on(info->netdev);
+ else
+ netif_carrier_off(info->netdev);
+ }
+#endif
+ wake_up_interruptible(&info->status_event_wait_q);
+ wake_up_interruptible(&info->event_wait_q);
+
+ if (tty_port_check_carrier(&info->port)) {
+ if (debug_level >= DEBUG_LEVEL_ISR)
+ printk("%s CD now %s...", info->device_name,
+ (info->serial_signals & SerialSignal_DCD) ? "on" : "off");
+ if (info->serial_signals & SerialSignal_DCD)
+ wake_up_interruptible(&info->port.open_wait);
+ else {
+ if (debug_level >= DEBUG_LEVEL_ISR)
+ printk("doing serial hangup...");
+ if (tty)
+ tty_hangup(tty);
+ }
+ }
+ info->pending_bh |= BH_STATUS;
+}
+
+static void dsr_change(MGSLPC_INFO *info)
+{
+ get_signals(info);
+ if ((info->dsr_chkcount)++ >= IO_PIN_SHUTDOWN_LIMIT)
+ port_irq_disable(info, PVR_DSR);
+ info->icount.dsr++;
+ if (info->serial_signals & SerialSignal_DSR)
+ info->input_signal_events.dsr_up++;
+ else
+ info->input_signal_events.dsr_down++;
+ wake_up_interruptible(&info->status_event_wait_q);
+ wake_up_interruptible(&info->event_wait_q);
+ info->pending_bh |= BH_STATUS;
+}
+
+static void ri_change(MGSLPC_INFO *info)
+{
+ get_signals(info);
+ if ((info->ri_chkcount)++ >= IO_PIN_SHUTDOWN_LIMIT)
+ port_irq_disable(info, PVR_RI);
+ info->icount.rng++;
+ if (info->serial_signals & SerialSignal_RI)
+ info->input_signal_events.ri_up++;
+ else
+ info->input_signal_events.ri_down++;
+ wake_up_interruptible(&info->status_event_wait_q);
+ wake_up_interruptible(&info->event_wait_q);
+ info->pending_bh |= BH_STATUS;
+}
+
+/* Interrupt service routine entry point.
+ *
+ * Arguments:
+ *
+ * irq interrupt number that caused interrupt
+ * dev_id device ID supplied during interrupt registration
+ */
+static irqreturn_t mgslpc_isr(int dummy, void *dev_id)
+{
+ MGSLPC_INFO *info = dev_id;
+ struct tty_struct *tty;
+ unsigned short isr;
+ unsigned char gis, pis;
+ int count=0;
+
+ if (debug_level >= DEBUG_LEVEL_ISR)
+ printk("mgslpc_isr(%d) entry.\n", info->irq_level);
+
+ if (!(info->p_dev->_locked))
+ return IRQ_HANDLED;
+
+ tty = tty_port_tty_get(&info->port);
+
+ spin_lock(&info->lock);
+
+ while ((gis = read_reg(info, CHA + GIS))) {
+ if (debug_level >= DEBUG_LEVEL_ISR)
+ printk("mgslpc_isr %s gis=%04X\n", info->device_name,gis);
+
+ if ((gis & 0x70) || count > 1000) {
+ printk("synclink_cs:hardware failed or ejected\n");
+ break;
+ }
+ count++;
+
+ if (gis & (BIT1 | BIT0)) {
+ isr = read_reg16(info, CHB + ISR);
+ if (isr & IRQ_DCD)
+ dcd_change(info, tty);
+ if (isr & IRQ_CTS)
+ cts_change(info, tty);
+ }
+ if (gis & (BIT3 | BIT2))
+ {
+ isr = read_reg16(info, CHA + ISR);
+ if (isr & IRQ_TIMER) {
+ info->irq_occurred = true;
+ irq_disable(info, CHA, IRQ_TIMER);
+ }
+
+ /* receive IRQs */
+ if (isr & IRQ_EXITHUNT) {
+ info->icount.exithunt++;
+ wake_up_interruptible(&info->event_wait_q);
+ }
+ if (isr & IRQ_BREAK_ON) {
+ info->icount.brk++;
+ if (info->port.flags & ASYNC_SAK)
+ do_SAK(tty);
+ }
+ if (isr & IRQ_RXTIME) {
+ issue_command(info, CHA, CMD_RXFIFO_READ);
+ }
+ if (isr & (IRQ_RXEOM | IRQ_RXFIFO)) {
+ if (info->params.mode == MGSL_MODE_HDLC)
+ rx_ready_hdlc(info, isr & IRQ_RXEOM);
+ else
+ rx_ready_async(info, isr & IRQ_RXEOM);
+ }
+
+ /* transmit IRQs */
+ if (isr & IRQ_UNDERRUN) {
+ if (info->tx_aborting)
+ info->icount.txabort++;
+ else
+ info->icount.txunder++;
+ tx_done(info, tty);
+ }
+ else if (isr & IRQ_ALLSENT) {
+ info->icount.txok++;
+ tx_done(info, tty);
+ }
+ else if (isr & IRQ_TXFIFO)
+ tx_ready(info, tty);
+ }
+ if (gis & BIT7) {
+ pis = read_reg(info, CHA + PIS);
+ if (pis & BIT1)
+ dsr_change(info);
+ if (pis & BIT2)
+ ri_change(info);
+ }
+ }
+
+ /* Request bottom half processing if there's something
+ * for it to do and the bh is not already running
+ */
+
+ if (info->pending_bh && !info->bh_running && !info->bh_requested) {
+ if (debug_level >= DEBUG_LEVEL_ISR)
+ printk("%s(%d):%s queueing bh task.\n",
+ __FILE__,__LINE__,info->device_name);
+ schedule_work(&info->task);
+ info->bh_requested = true;
+ }
+
+ spin_unlock(&info->lock);
+ tty_kref_put(tty);
+
+ if (debug_level >= DEBUG_LEVEL_ISR)
+ printk("%s(%d):mgslpc_isr(%d)exit.\n",
+ __FILE__, __LINE__, info->irq_level);
+
+ return IRQ_HANDLED;
+}
+
+/* Initialize and start device.
+ */
+static int startup(MGSLPC_INFO * info, struct tty_struct *tty)
+{
+ int retval = 0;
+
+ if (debug_level >= DEBUG_LEVEL_INFO)
+ printk("%s(%d):startup(%s)\n", __FILE__, __LINE__, info->device_name);
+
+ if (tty_port_initialized(&info->port))
+ return 0;
+
+ if (!info->tx_buf) {
+ /* allocate a page of memory for a transmit buffer */
+ info->tx_buf = (unsigned char *)get_zeroed_page(GFP_KERNEL);
+ if (!info->tx_buf) {
+ printk(KERN_ERR"%s(%d):%s can't allocate transmit buffer\n",
+ __FILE__, __LINE__, info->device_name);
+ return -ENOMEM;
+ }
+ }
+
+ info->pending_bh = 0;
+
+ memset(&info->icount, 0, sizeof(info->icount));
+
+ timer_setup(&info->tx_timer, tx_timeout, 0);
+
+ /* Allocate and claim adapter resources */
+ retval = claim_resources(info);
+
+ /* perform existence check and diagnostics */
+ if (!retval)
+ retval = adapter_test(info);
+
+ if (retval) {
+ if (capable(CAP_SYS_ADMIN) && tty)
+ set_bit(TTY_IO_ERROR, &tty->flags);
+ release_resources(info);
+ return retval;
+ }
+
+ /* program hardware for current parameters */
+ mgslpc_change_params(info, tty);
+
+ if (tty)
+ clear_bit(TTY_IO_ERROR, &tty->flags);
+
+ tty_port_set_initialized(&info->port, 1);
+
+ return 0;
+}
+
+/* Called by mgslpc_close() and mgslpc_hangup() to shutdown hardware
+ */
+static void shutdown(MGSLPC_INFO * info, struct tty_struct *tty)
+{
+ unsigned long flags;
+
+ if (!tty_port_initialized(&info->port))
+ return;
+
+ if (debug_level >= DEBUG_LEVEL_INFO)
+ printk("%s(%d):mgslpc_shutdown(%s)\n",
+ __FILE__, __LINE__, info->device_name);
+
+ /* clear status wait queue because status changes */
+ /* can't happen after shutting down the hardware */
+ wake_up_interruptible(&info->status_event_wait_q);
+ wake_up_interruptible(&info->event_wait_q);
+
+ del_timer_sync(&info->tx_timer);
+
+ if (info->tx_buf) {
+ free_page((unsigned long) info->tx_buf);
+ info->tx_buf = NULL;
+ }
+
+ spin_lock_irqsave(&info->lock, flags);
+
+ rx_stop(info);
+ tx_stop(info);
+
+ /* TODO:disable interrupts instead of reset to preserve signal states */
+ reset_device(info);
+
+ if (!tty || C_HUPCL(tty)) {
+ info->serial_signals &= ~(SerialSignal_RTS | SerialSignal_DTR);
+ set_signals(info);
+ }
+
+ spin_unlock_irqrestore(&info->lock, flags);
+
+ release_resources(info);
+
+ if (tty)
+ set_bit(TTY_IO_ERROR, &tty->flags);
+
+ tty_port_set_initialized(&info->port, 0);
+}
+
+static void mgslpc_program_hw(MGSLPC_INFO *info, struct tty_struct *tty)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&info->lock, flags);
+
+ rx_stop(info);
+ tx_stop(info);
+ info->tx_count = info->tx_put = info->tx_get = 0;
+
+ if (info->params.mode == MGSL_MODE_HDLC || info->netcount)
+ hdlc_mode(info);
+ else
+ async_mode(info);
+
+ set_signals(info);
+
+ info->dcd_chkcount = 0;
+ info->cts_chkcount = 0;
+ info->ri_chkcount = 0;
+ info->dsr_chkcount = 0;
+
+ irq_enable(info, CHB, IRQ_DCD | IRQ_CTS);
+ port_irq_enable(info, (unsigned char) PVR_DSR | PVR_RI);
+ get_signals(info);
+
+ if (info->netcount || (tty && C_CREAD(tty)))
+ rx_start(info);
+
+ spin_unlock_irqrestore(&info->lock, flags);
+}
+
+/* Reconfigure adapter based on new parameters
+ */
+static void mgslpc_change_params(MGSLPC_INFO *info, struct tty_struct *tty)
+{
+ unsigned cflag;
+ int bits_per_char;
+
+ if (!tty)
+ return;
+
+ if (debug_level >= DEBUG_LEVEL_INFO)
+ printk("%s(%d):mgslpc_change_params(%s)\n",
+ __FILE__, __LINE__, info->device_name);
+
+ cflag = tty->termios.c_cflag;
+
+ /* if B0 rate (hangup) specified then negate RTS and DTR */
+ /* otherwise assert RTS and DTR */
+ if (cflag & CBAUD)
+ info->serial_signals |= SerialSignal_RTS | SerialSignal_DTR;
+ else
+ info->serial_signals &= ~(SerialSignal_RTS | SerialSignal_DTR);
+
+ /* byte size and parity */
+ if ((cflag & CSIZE) != CS8) {
+ cflag &= ~CSIZE;
+ cflag |= CS7;
+ tty->termios.c_cflag = cflag;
+ }
+ info->params.data_bits = tty_get_char_size(cflag);
+
+ if (cflag & CSTOPB)
+ info->params.stop_bits = 2;
+ else
+ info->params.stop_bits = 1;
+
+ info->params.parity = ASYNC_PARITY_NONE;
+ if (cflag & PARENB) {
+ if (cflag & PARODD)
+ info->params.parity = ASYNC_PARITY_ODD;
+ else
+ info->params.parity = ASYNC_PARITY_EVEN;
+ if (cflag & CMSPAR)
+ info->params.parity = ASYNC_PARITY_SPACE;
+ }
+
+ /* calculate number of jiffies to transmit a full
+ * FIFO (32 bytes) at specified data rate
+ */
+ bits_per_char = info->params.data_bits +
+ info->params.stop_bits + 1;
+
+ /* if port data rate is set to 460800 or less then
+ * allow tty settings to override, otherwise keep the
+ * current data rate.
+ */
+ if (info->params.data_rate <= 460800) {
+ info->params.data_rate = tty_get_baud_rate(tty);
+ }
+
+ if (info->params.data_rate) {
+ info->timeout = (32*HZ*bits_per_char) /
+ info->params.data_rate;
+ }
+ info->timeout += HZ/50; /* Add .02 seconds of slop */
+
+ tty_port_set_cts_flow(&info->port, cflag & CRTSCTS);
+ tty_port_set_check_carrier(&info->port, ~cflag & CLOCAL);
+
+ /* process tty input control flags */
+
+ info->read_status_mask = 0;
+ if (I_INPCK(tty))
+ info->read_status_mask |= BIT7 | BIT6;
+ if (I_IGNPAR(tty))
+ info->ignore_status_mask |= BIT7 | BIT6;
+
+ mgslpc_program_hw(info, tty);
+}
+
+/* Add a character to the transmit buffer
+ */
+static int mgslpc_put_char(struct tty_struct *tty, unsigned char ch)
+{
+ MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data;
+ unsigned long flags;
+
+ if (debug_level >= DEBUG_LEVEL_INFO) {
+ printk("%s(%d):mgslpc_put_char(%d) on %s\n",
+ __FILE__, __LINE__, ch, info->device_name);
+ }
+
+ if (mgslpc_paranoia_check(info, tty->name, "mgslpc_put_char"))
+ return 0;
+
+ if (!info->tx_buf)
+ return 0;
+
+ spin_lock_irqsave(&info->lock, flags);
+
+ if (info->params.mode == MGSL_MODE_ASYNC || !info->tx_active) {
+ if (info->tx_count < TXBUFSIZE - 1) {
+ info->tx_buf[info->tx_put++] = ch;
+ info->tx_put &= TXBUFSIZE-1;
+ info->tx_count++;
+ }
+ }
+
+ spin_unlock_irqrestore(&info->lock, flags);
+ return 1;
+}
+
+/* Enable transmitter so remaining characters in the
+ * transmit buffer are sent.
+ */
+static void mgslpc_flush_chars(struct tty_struct *tty)
+{
+ MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data;
+ unsigned long flags;
+
+ if (debug_level >= DEBUG_LEVEL_INFO)
+ printk("%s(%d):mgslpc_flush_chars() entry on %s tx_count=%d\n",
+ __FILE__, __LINE__, info->device_name, info->tx_count);
+
+ if (mgslpc_paranoia_check(info, tty->name, "mgslpc_flush_chars"))
+ return;
+
+ if (info->tx_count <= 0 || tty->flow.stopped ||
+ tty->hw_stopped || !info->tx_buf)
+ return;
+
+ if (debug_level >= DEBUG_LEVEL_INFO)
+ printk("%s(%d):mgslpc_flush_chars() entry on %s starting transmitter\n",
+ __FILE__, __LINE__, info->device_name);
+
+ spin_lock_irqsave(&info->lock, flags);
+ if (!info->tx_active)
+ tx_start(info, tty);
+ spin_unlock_irqrestore(&info->lock, flags);
+}
+
+/* Send a block of data
+ *
+ * Arguments:
+ *
+ * tty pointer to tty information structure
+ * buf pointer to buffer containing send data
+ * count size of send data in bytes
+ *
+ * Returns: number of characters written
+ */
+static int mgslpc_write(struct tty_struct * tty,
+ const unsigned char *buf, int count)
+{
+ int c, ret = 0;
+ MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data;
+ unsigned long flags;
+
+ if (debug_level >= DEBUG_LEVEL_INFO)
+ printk("%s(%d):mgslpc_write(%s) count=%d\n",
+ __FILE__, __LINE__, info->device_name, count);
+
+ if (mgslpc_paranoia_check(info, tty->name, "mgslpc_write") ||
+ !info->tx_buf)
+ goto cleanup;
+
+ if (info->params.mode == MGSL_MODE_HDLC) {
+ if (count > TXBUFSIZE) {
+ ret = -EIO;
+ goto cleanup;
+ }
+ if (info->tx_active)
+ goto cleanup;
+ else if (info->tx_count)
+ goto start;
+ }
+
+ for (;;) {
+ c = min(count,
+ min(TXBUFSIZE - info->tx_count - 1,
+ TXBUFSIZE - info->tx_put));
+ if (c <= 0)
+ break;
+
+ memcpy(info->tx_buf + info->tx_put, buf, c);
+
+ spin_lock_irqsave(&info->lock, flags);
+ info->tx_put = (info->tx_put + c) & (TXBUFSIZE-1);
+ info->tx_count += c;
+ spin_unlock_irqrestore(&info->lock, flags);
+
+ buf += c;
+ count -= c;
+ ret += c;
+ }
+start:
+ if (info->tx_count && !tty->flow.stopped && !tty->hw_stopped) {
+ spin_lock_irqsave(&info->lock, flags);
+ if (!info->tx_active)
+ tx_start(info, tty);
+ spin_unlock_irqrestore(&info->lock, flags);
+ }
+cleanup:
+ if (debug_level >= DEBUG_LEVEL_INFO)
+ printk("%s(%d):mgslpc_write(%s) returning=%d\n",
+ __FILE__, __LINE__, info->device_name, ret);
+ return ret;
+}
+
+/* Return the count of free bytes in transmit buffer
+ */
+static unsigned int mgslpc_write_room(struct tty_struct *tty)
+{
+ MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data;
+ int ret;
+
+ if (mgslpc_paranoia_check(info, tty->name, "mgslpc_write_room"))
+ return 0;
+
+ if (info->params.mode == MGSL_MODE_HDLC) {
+ /* HDLC (frame oriented) mode */
+ if (info->tx_active)
+ return 0;
+ else
+ return HDLC_MAX_FRAME_SIZE;
+ } else {
+ ret = TXBUFSIZE - info->tx_count - 1;
+ if (ret < 0)
+ ret = 0;
+ }
+
+ if (debug_level >= DEBUG_LEVEL_INFO)
+ printk("%s(%d):mgslpc_write_room(%s)=%d\n",
+ __FILE__, __LINE__, info->device_name, ret);
+ return ret;
+}
+
+/* Return the count of bytes in transmit buffer
+ */
+static unsigned int mgslpc_chars_in_buffer(struct tty_struct *tty)
+{
+ MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data;
+ unsigned int rc;
+
+ if (debug_level >= DEBUG_LEVEL_INFO)
+ printk("%s(%d):mgslpc_chars_in_buffer(%s)\n",
+ __FILE__, __LINE__, info->device_name);
+
+ if (mgslpc_paranoia_check(info, tty->name, "mgslpc_chars_in_buffer"))
+ return 0;
+
+ if (info->params.mode == MGSL_MODE_HDLC)
+ rc = info->tx_active ? info->max_frame_size : 0;
+ else
+ rc = info->tx_count;
+
+ if (debug_level >= DEBUG_LEVEL_INFO)
+ printk("%s(%d):mgslpc_chars_in_buffer(%s)=%u\n",
+ __FILE__, __LINE__, info->device_name, rc);
+
+ return rc;
+}
+
+/* Discard all data in the send buffer
+ */
+static void mgslpc_flush_buffer(struct tty_struct *tty)
+{
+ MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data;
+ unsigned long flags;
+
+ if (debug_level >= DEBUG_LEVEL_INFO)
+ printk("%s(%d):mgslpc_flush_buffer(%s) entry\n",
+ __FILE__, __LINE__, info->device_name);
+
+ if (mgslpc_paranoia_check(info, tty->name, "mgslpc_flush_buffer"))
+ return;
+
+ spin_lock_irqsave(&info->lock, flags);
+ info->tx_count = info->tx_put = info->tx_get = 0;
+ del_timer(&info->tx_timer);
+ spin_unlock_irqrestore(&info->lock, flags);
+
+ wake_up_interruptible(&tty->write_wait);
+ tty_wakeup(tty);
+}
+
+/* Send a high-priority XON/XOFF character
+ */
+static void mgslpc_send_xchar(struct tty_struct *tty, char ch)
+{
+ MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data;
+ unsigned long flags;
+
+ if (debug_level >= DEBUG_LEVEL_INFO)
+ printk("%s(%d):mgslpc_send_xchar(%s,%d)\n",
+ __FILE__, __LINE__, info->device_name, ch);
+
+ if (mgslpc_paranoia_check(info, tty->name, "mgslpc_send_xchar"))
+ return;
+
+ info->x_char = ch;
+ if (ch) {
+ spin_lock_irqsave(&info->lock, flags);
+ if (!info->tx_enabled)
+ tx_start(info, tty);
+ spin_unlock_irqrestore(&info->lock, flags);
+ }
+}
+
+/* Signal remote device to throttle send data (our receive data)
+ */
+static void mgslpc_throttle(struct tty_struct * tty)
+{
+ MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data;
+ unsigned long flags;
+
+ if (debug_level >= DEBUG_LEVEL_INFO)
+ printk("%s(%d):mgslpc_throttle(%s) entry\n",
+ __FILE__, __LINE__, info->device_name);
+
+ if (mgslpc_paranoia_check(info, tty->name, "mgslpc_throttle"))
+ return;
+
+ if (I_IXOFF(tty))
+ mgslpc_send_xchar(tty, STOP_CHAR(tty));
+
+ if (C_CRTSCTS(tty)) {
+ spin_lock_irqsave(&info->lock, flags);
+ info->serial_signals &= ~SerialSignal_RTS;
+ set_signals(info);
+ spin_unlock_irqrestore(&info->lock, flags);
+ }
+}
+
+/* Signal remote device to stop throttling send data (our receive data)
+ */
+static void mgslpc_unthrottle(struct tty_struct * tty)
+{
+ MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data;
+ unsigned long flags;
+
+ if (debug_level >= DEBUG_LEVEL_INFO)
+ printk("%s(%d):mgslpc_unthrottle(%s) entry\n",
+ __FILE__, __LINE__, info->device_name);
+
+ if (mgslpc_paranoia_check(info, tty->name, "mgslpc_unthrottle"))
+ return;
+
+ if (I_IXOFF(tty)) {
+ if (info->x_char)
+ info->x_char = 0;
+ else
+ mgslpc_send_xchar(tty, START_CHAR(tty));
+ }
+
+ if (C_CRTSCTS(tty)) {
+ spin_lock_irqsave(&info->lock, flags);
+ info->serial_signals |= SerialSignal_RTS;
+ set_signals(info);
+ spin_unlock_irqrestore(&info->lock, flags);
+ }
+}
+
+/* get the current serial statistics
+ */
+static int get_stats(MGSLPC_INFO * info, struct mgsl_icount __user *user_icount)
+{
+ int err;
+ if (debug_level >= DEBUG_LEVEL_INFO)
+ printk("get_params(%s)\n", info->device_name);
+ if (!user_icount) {
+ memset(&info->icount, 0, sizeof(info->icount));
+ } else {
+ COPY_TO_USER(err, user_icount, &info->icount, sizeof(struct mgsl_icount));
+ if (err)
+ return -EFAULT;
+ }
+ return 0;
+}
+
+/* get the current serial parameters
+ */
+static int get_params(MGSLPC_INFO * info, MGSL_PARAMS __user *user_params)
+{
+ int err;
+ if (debug_level >= DEBUG_LEVEL_INFO)
+ printk("get_params(%s)\n", info->device_name);
+ COPY_TO_USER(err,user_params, &info->params, sizeof(MGSL_PARAMS));
+ if (err)
+ return -EFAULT;
+ return 0;
+}
+
+/* set the serial parameters
+ *
+ * Arguments:
+ *
+ * info pointer to device instance data
+ * new_params user buffer containing new serial params
+ *
+ * Returns: 0 if success, otherwise error code
+ */
+static int set_params(MGSLPC_INFO * info, MGSL_PARAMS __user *new_params, struct tty_struct *tty)
+{
+ unsigned long flags;
+ MGSL_PARAMS tmp_params;
+ int err;
+
+ if (debug_level >= DEBUG_LEVEL_INFO)
+ printk("%s(%d):set_params %s\n", __FILE__,__LINE__,
+ info->device_name);
+ COPY_FROM_USER(err,&tmp_params, new_params, sizeof(MGSL_PARAMS));
+ if (err) {
+ if (debug_level >= DEBUG_LEVEL_INFO)
+ printk("%s(%d):set_params(%s) user buffer copy failed\n",
+ __FILE__, __LINE__, info->device_name);
+ return -EFAULT;
+ }
+
+ spin_lock_irqsave(&info->lock, flags);
+ memcpy(&info->params,&tmp_params,sizeof(MGSL_PARAMS));
+ spin_unlock_irqrestore(&info->lock, flags);
+
+ mgslpc_change_params(info, tty);
+
+ return 0;
+}
+
+static int get_txidle(MGSLPC_INFO * info, int __user *idle_mode)
+{
+ int err;
+ if (debug_level >= DEBUG_LEVEL_INFO)
+ printk("get_txidle(%s)=%d\n", info->device_name, info->idle_mode);
+ COPY_TO_USER(err,idle_mode, &info->idle_mode, sizeof(int));
+ if (err)
+ return -EFAULT;
+ return 0;
+}
+
+static int set_txidle(MGSLPC_INFO * info, int idle_mode)
+{
+ unsigned long flags;
+ if (debug_level >= DEBUG_LEVEL_INFO)
+ printk("set_txidle(%s,%d)\n", info->device_name, idle_mode);
+ spin_lock_irqsave(&info->lock, flags);
+ info->idle_mode = idle_mode;
+ tx_set_idle(info);
+ spin_unlock_irqrestore(&info->lock, flags);
+ return 0;
+}
+
+static int get_interface(MGSLPC_INFO * info, int __user *if_mode)
+{
+ int err;
+ if (debug_level >= DEBUG_LEVEL_INFO)
+ printk("get_interface(%s)=%d\n", info->device_name, info->if_mode);
+ COPY_TO_USER(err,if_mode, &info->if_mode, sizeof(int));
+ if (err)
+ return -EFAULT;
+ return 0;
+}
+
+static int set_interface(MGSLPC_INFO * info, int if_mode)
+{
+ unsigned long flags;
+ unsigned char val;
+ if (debug_level >= DEBUG_LEVEL_INFO)
+ printk("set_interface(%s,%d)\n", info->device_name, if_mode);
+ spin_lock_irqsave(&info->lock, flags);
+ info->if_mode = if_mode;
+
+ val = read_reg(info, PVR) & 0x0f;
+ switch (info->if_mode)
+ {
+ case MGSL_INTERFACE_RS232: val |= PVR_RS232; break;
+ case MGSL_INTERFACE_V35: val |= PVR_V35; break;
+ case MGSL_INTERFACE_RS422: val |= PVR_RS422; break;
+ }
+ write_reg(info, PVR, val);
+
+ spin_unlock_irqrestore(&info->lock, flags);
+ return 0;
+}
+
+static int set_txenable(MGSLPC_INFO * info, int enable, struct tty_struct *tty)
+{
+ unsigned long flags;
+
+ if (debug_level >= DEBUG_LEVEL_INFO)
+ printk("set_txenable(%s,%d)\n", info->device_name, enable);
+
+ spin_lock_irqsave(&info->lock, flags);
+ if (enable) {
+ if (!info->tx_enabled)
+ tx_start(info, tty);
+ } else {
+ if (info->tx_enabled)
+ tx_stop(info);
+ }
+ spin_unlock_irqrestore(&info->lock, flags);
+ return 0;
+}
+
+static int tx_abort(MGSLPC_INFO * info)
+{
+ unsigned long flags;
+
+ if (debug_level >= DEBUG_LEVEL_INFO)
+ printk("tx_abort(%s)\n", info->device_name);
+
+ spin_lock_irqsave(&info->lock, flags);
+ if (info->tx_active && info->tx_count &&
+ info->params.mode == MGSL_MODE_HDLC) {
+ /* clear data count so FIFO is not filled on next IRQ.
+ * This results in underrun and abort transmission.
+ */
+ info->tx_count = info->tx_put = info->tx_get = 0;
+ info->tx_aborting = true;
+ }
+ spin_unlock_irqrestore(&info->lock, flags);
+ return 0;
+}
+
+static int set_rxenable(MGSLPC_INFO * info, int enable)
+{
+ unsigned long flags;
+
+ if (debug_level >= DEBUG_LEVEL_INFO)
+ printk("set_rxenable(%s,%d)\n", info->device_name, enable);
+
+ spin_lock_irqsave(&info->lock, flags);
+ if (enable) {
+ if (!info->rx_enabled)
+ rx_start(info);
+ } else {
+ if (info->rx_enabled)
+ rx_stop(info);
+ }
+ spin_unlock_irqrestore(&info->lock, flags);
+ return 0;
+}
+
+/* wait for specified event to occur
+ *
+ * Arguments: info pointer to device instance data
+ * mask pointer to bitmask of events to wait for
+ * Return Value: 0 if successful and bit mask updated with
+ * of events triggerred,
+ * otherwise error code
+ */
+static int wait_events(MGSLPC_INFO * info, int __user *mask_ptr)
+{
+ unsigned long flags;
+ int s;
+ int rc=0;
+ struct mgsl_icount cprev, cnow;
+ int events;
+ int mask;
+ struct _input_signal_events oldsigs, newsigs;
+ DECLARE_WAITQUEUE(wait, current);
+
+ COPY_FROM_USER(rc,&mask, mask_ptr, sizeof(int));
+ if (rc)
+ return -EFAULT;
+
+ if (debug_level >= DEBUG_LEVEL_INFO)
+ printk("wait_events(%s,%d)\n", info->device_name, mask);
+
+ spin_lock_irqsave(&info->lock, flags);
+
+ /* return immediately if state matches requested events */
+ get_signals(info);
+ s = info->serial_signals;
+ events = mask &
+ ( ((s & SerialSignal_DSR) ? MgslEvent_DsrActive:MgslEvent_DsrInactive) +
+ ((s & SerialSignal_DCD) ? MgslEvent_DcdActive:MgslEvent_DcdInactive) +
+ ((s & SerialSignal_CTS) ? MgslEvent_CtsActive:MgslEvent_CtsInactive) +
+ ((s & SerialSignal_RI) ? MgslEvent_RiActive :MgslEvent_RiInactive) );
+ if (events) {
+ spin_unlock_irqrestore(&info->lock, flags);
+ goto exit;
+ }
+
+ /* save current irq counts */
+ cprev = info->icount;
+ oldsigs = info->input_signal_events;
+
+ if ((info->params.mode == MGSL_MODE_HDLC) &&
+ (mask & MgslEvent_ExitHuntMode))
+ irq_enable(info, CHA, IRQ_EXITHUNT);
+
+ set_current_state(TASK_INTERRUPTIBLE);
+ add_wait_queue(&info->event_wait_q, &wait);
+
+ spin_unlock_irqrestore(&info->lock, flags);
+
+
+ for(;;) {
+ schedule();
+ if (signal_pending(current)) {
+ rc = -ERESTARTSYS;
+ break;
+ }
+
+ /* get current irq counts */
+ spin_lock_irqsave(&info->lock, flags);
+ cnow = info->icount;
+ newsigs = info->input_signal_events;
+ set_current_state(TASK_INTERRUPTIBLE);
+ spin_unlock_irqrestore(&info->lock, flags);
+
+ /* if no change, wait aborted for some reason */
+ if (newsigs.dsr_up == oldsigs.dsr_up &&
+ newsigs.dsr_down == oldsigs.dsr_down &&
+ newsigs.dcd_up == oldsigs.dcd_up &&
+ newsigs.dcd_down == oldsigs.dcd_down &&
+ newsigs.cts_up == oldsigs.cts_up &&
+ newsigs.cts_down == oldsigs.cts_down &&
+ newsigs.ri_up == oldsigs.ri_up &&
+ newsigs.ri_down == oldsigs.ri_down &&
+ cnow.exithunt == cprev.exithunt &&
+ cnow.rxidle == cprev.rxidle) {
+ rc = -EIO;
+ break;
+ }
+
+ events = mask &
+ ( (newsigs.dsr_up != oldsigs.dsr_up ? MgslEvent_DsrActive:0) +
+ (newsigs.dsr_down != oldsigs.dsr_down ? MgslEvent_DsrInactive:0) +
+ (newsigs.dcd_up != oldsigs.dcd_up ? MgslEvent_DcdActive:0) +
+ (newsigs.dcd_down != oldsigs.dcd_down ? MgslEvent_DcdInactive:0) +
+ (newsigs.cts_up != oldsigs.cts_up ? MgslEvent_CtsActive:0) +
+ (newsigs.cts_down != oldsigs.cts_down ? MgslEvent_CtsInactive:0) +
+ (newsigs.ri_up != oldsigs.ri_up ? MgslEvent_RiActive:0) +
+ (newsigs.ri_down != oldsigs.ri_down ? MgslEvent_RiInactive:0) +
+ (cnow.exithunt != cprev.exithunt ? MgslEvent_ExitHuntMode:0) +
+ (cnow.rxidle != cprev.rxidle ? MgslEvent_IdleReceived:0) );
+ if (events)
+ break;
+
+ cprev = cnow;
+ oldsigs = newsigs;
+ }
+
+ remove_wait_queue(&info->event_wait_q, &wait);
+ set_current_state(TASK_RUNNING);
+
+ if (mask & MgslEvent_ExitHuntMode) {
+ spin_lock_irqsave(&info->lock, flags);
+ if (!waitqueue_active(&info->event_wait_q))
+ irq_disable(info, CHA, IRQ_EXITHUNT);
+ spin_unlock_irqrestore(&info->lock, flags);
+ }
+exit:
+ if (rc == 0)
+ PUT_USER(rc, events, mask_ptr);
+ return rc;
+}
+
+static int modem_input_wait(MGSLPC_INFO *info,int arg)
+{
+ unsigned long flags;
+ int rc;
+ struct mgsl_icount cprev, cnow;
+ DECLARE_WAITQUEUE(wait, current);
+
+ /* save current irq counts */
+ spin_lock_irqsave(&info->lock, flags);
+ cprev = info->icount;
+ add_wait_queue(&info->status_event_wait_q, &wait);
+ set_current_state(TASK_INTERRUPTIBLE);
+ spin_unlock_irqrestore(&info->lock, flags);
+
+ for(;;) {
+ schedule();
+ if (signal_pending(current)) {
+ rc = -ERESTARTSYS;
+ break;
+ }
+
+ /* get new irq counts */
+ spin_lock_irqsave(&info->lock, flags);
+ cnow = info->icount;
+ set_current_state(TASK_INTERRUPTIBLE);
+ spin_unlock_irqrestore(&info->lock, flags);
+
+ /* if no change, wait aborted for some reason */
+ if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
+ cnow.dcd == cprev.dcd && cnow.cts == cprev.cts) {
+ rc = -EIO;
+ break;
+ }
+
+ /* check for change in caller specified modem input */
+ if ((arg & TIOCM_RNG && cnow.rng != cprev.rng) ||
+ (arg & TIOCM_DSR && cnow.dsr != cprev.dsr) ||
+ (arg & TIOCM_CD && cnow.dcd != cprev.dcd) ||
+ (arg & TIOCM_CTS && cnow.cts != cprev.cts)) {
+ rc = 0;
+ break;
+ }
+
+ cprev = cnow;
+ }
+ remove_wait_queue(&info->status_event_wait_q, &wait);
+ set_current_state(TASK_RUNNING);
+ return rc;
+}
+
+/* return the state of the serial control and status signals
+ */
+static int tiocmget(struct tty_struct *tty)
+{
+ MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data;
+ unsigned int result;
+ unsigned long flags;
+
+ spin_lock_irqsave(&info->lock, flags);
+ get_signals(info);
+ spin_unlock_irqrestore(&info->lock, flags);
+
+ result = ((info->serial_signals & SerialSignal_RTS) ? TIOCM_RTS:0) +
+ ((info->serial_signals & SerialSignal_DTR) ? TIOCM_DTR:0) +
+ ((info->serial_signals & SerialSignal_DCD) ? TIOCM_CAR:0) +
+ ((info->serial_signals & SerialSignal_RI) ? TIOCM_RNG:0) +
+ ((info->serial_signals & SerialSignal_DSR) ? TIOCM_DSR:0) +
+ ((info->serial_signals & SerialSignal_CTS) ? TIOCM_CTS:0);
+
+ if (debug_level >= DEBUG_LEVEL_INFO)
+ printk("%s(%d):%s tiocmget() value=%08X\n",
+ __FILE__, __LINE__, info->device_name, result);
+ return result;
+}
+
+/* set modem control signals (DTR/RTS)
+ */
+static int tiocmset(struct tty_struct *tty,
+ unsigned int set, unsigned int clear)
+{
+ MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data;
+ unsigned long flags;
+
+ if (debug_level >= DEBUG_LEVEL_INFO)
+ printk("%s(%d):%s tiocmset(%x,%x)\n",
+ __FILE__, __LINE__, info->device_name, set, clear);
+
+ if (set & TIOCM_RTS)
+ info->serial_signals |= SerialSignal_RTS;
+ if (set & TIOCM_DTR)
+ info->serial_signals |= SerialSignal_DTR;
+ if (clear & TIOCM_RTS)
+ info->serial_signals &= ~SerialSignal_RTS;
+ if (clear & TIOCM_DTR)
+ info->serial_signals &= ~SerialSignal_DTR;
+
+ spin_lock_irqsave(&info->lock, flags);
+ set_signals(info);
+ spin_unlock_irqrestore(&info->lock, flags);
+
+ return 0;
+}
+
+/* Set or clear transmit break condition
+ *
+ * Arguments: tty pointer to tty instance data
+ * break_state -1=set break condition, 0=clear
+ */
+static int mgslpc_break(struct tty_struct *tty, int break_state)
+{
+ MGSLPC_INFO * info = (MGSLPC_INFO *)tty->driver_data;
+ unsigned long flags;
+
+ if (debug_level >= DEBUG_LEVEL_INFO)
+ printk("%s(%d):mgslpc_break(%s,%d)\n",
+ __FILE__, __LINE__, info->device_name, break_state);
+
+ if (mgslpc_paranoia_check(info, tty->name, "mgslpc_break"))
+ return -EINVAL;
+
+ spin_lock_irqsave(&info->lock, flags);
+ if (break_state == -1)
+ set_reg_bits(info, CHA+DAFO, BIT6);
+ else
+ clear_reg_bits(info, CHA+DAFO, BIT6);
+ spin_unlock_irqrestore(&info->lock, flags);
+ return 0;
+}
+
+static int mgslpc_get_icount(struct tty_struct *tty,
+ struct serial_icounter_struct *icount)
+{
+ MGSLPC_INFO * info = (MGSLPC_INFO *)tty->driver_data;
+ struct mgsl_icount cnow; /* kernel counter temps */
+ unsigned long flags;
+
+ spin_lock_irqsave(&info->lock, flags);
+ cnow = info->icount;
+ spin_unlock_irqrestore(&info->lock, flags);
+
+ icount->cts = cnow.cts;
+ icount->dsr = cnow.dsr;
+ icount->rng = cnow.rng;
+ icount->dcd = cnow.dcd;
+ icount->rx = cnow.rx;
+ icount->tx = cnow.tx;
+ icount->frame = cnow.frame;
+ icount->overrun = cnow.overrun;
+ icount->parity = cnow.parity;
+ icount->brk = cnow.brk;
+ icount->buf_overrun = cnow.buf_overrun;
+
+ return 0;
+}
+
+/* Service an IOCTL request
+ *
+ * Arguments:
+ *
+ * tty pointer to tty instance data
+ * cmd IOCTL command code
+ * arg command argument/context
+ *
+ * Return Value: 0 if success, otherwise error code
+ */
+static int mgslpc_ioctl(struct tty_struct *tty,
+ unsigned int cmd, unsigned long arg)
+{
+ MGSLPC_INFO * info = (MGSLPC_INFO *)tty->driver_data;
+ void __user *argp = (void __user *)arg;
+
+ if (debug_level >= DEBUG_LEVEL_INFO)
+ printk("%s(%d):mgslpc_ioctl %s cmd=%08X\n", __FILE__, __LINE__,
+ info->device_name, cmd);
+
+ if (mgslpc_paranoia_check(info, tty->name, "mgslpc_ioctl"))
+ return -ENODEV;
+
+ if (cmd != TIOCMIWAIT) {
+ if (tty_io_error(tty))
+ return -EIO;
+ }
+
+ switch (cmd) {
+ case MGSL_IOCGPARAMS:
+ return get_params(info, argp);
+ case MGSL_IOCSPARAMS:
+ return set_params(info, argp, tty);
+ case MGSL_IOCGTXIDLE:
+ return get_txidle(info, argp);
+ case MGSL_IOCSTXIDLE:
+ return set_txidle(info, (int)arg);
+ case MGSL_IOCGIF:
+ return get_interface(info, argp);
+ case MGSL_IOCSIF:
+ return set_interface(info,(int)arg);
+ case MGSL_IOCTXENABLE:
+ return set_txenable(info,(int)arg, tty);
+ case MGSL_IOCRXENABLE:
+ return set_rxenable(info,(int)arg);
+ case MGSL_IOCTXABORT:
+ return tx_abort(info);
+ case MGSL_IOCGSTATS:
+ return get_stats(info, argp);
+ case MGSL_IOCWAITEVENT:
+ return wait_events(info, argp);
+ case TIOCMIWAIT:
+ return modem_input_wait(info,(int)arg);
+ default:
+ return -ENOIOCTLCMD;
+ }
+ return 0;
+}
+
+/* Set new termios settings
+ *
+ * Arguments:
+ *
+ * tty pointer to tty structure
+ * termios pointer to buffer to hold returned old termios
+ */
+static void mgslpc_set_termios(struct tty_struct *tty,
+ const struct ktermios *old_termios)
+{
+ MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data;
+ unsigned long flags;
+
+ if (debug_level >= DEBUG_LEVEL_INFO)
+ printk("%s(%d):mgslpc_set_termios %s\n", __FILE__, __LINE__,
+ tty->driver->name);
+
+ /* just return if nothing has changed */
+ if ((tty->termios.c_cflag == old_termios->c_cflag)
+ && (RELEVANT_IFLAG(tty->termios.c_iflag)
+ == RELEVANT_IFLAG(old_termios->c_iflag)))
+ return;
+
+ mgslpc_change_params(info, tty);
+
+ /* Handle transition to B0 status */
+ if ((old_termios->c_cflag & CBAUD) && !C_BAUD(tty)) {
+ info->serial_signals &= ~(SerialSignal_RTS | SerialSignal_DTR);
+ spin_lock_irqsave(&info->lock, flags);
+ set_signals(info);
+ spin_unlock_irqrestore(&info->lock, flags);
+ }
+
+ /* Handle transition away from B0 status */
+ if (!(old_termios->c_cflag & CBAUD) && C_BAUD(tty)) {
+ info->serial_signals |= SerialSignal_DTR;
+ if (!C_CRTSCTS(tty) || !tty_throttled(tty))
+ info->serial_signals |= SerialSignal_RTS;
+ spin_lock_irqsave(&info->lock, flags);
+ set_signals(info);
+ spin_unlock_irqrestore(&info->lock, flags);
+ }
+
+ /* Handle turning off CRTSCTS */
+ if (old_termios->c_cflag & CRTSCTS && !C_CRTSCTS(tty)) {
+ tty->hw_stopped = 0;
+ tx_release(tty);
+ }
+}
+
+static void mgslpc_close(struct tty_struct *tty, struct file * filp)
+{
+ MGSLPC_INFO * info = (MGSLPC_INFO *)tty->driver_data;
+ struct tty_port *port = &info->port;
+
+ if (mgslpc_paranoia_check(info, tty->name, "mgslpc_close"))
+ return;
+
+ if (debug_level >= DEBUG_LEVEL_INFO)
+ printk("%s(%d):mgslpc_close(%s) entry, count=%d\n",
+ __FILE__, __LINE__, info->device_name, port->count);
+
+ if (tty_port_close_start(port, tty, filp) == 0)
+ goto cleanup;
+
+ if (tty_port_initialized(port))
+ mgslpc_wait_until_sent(tty, info->timeout);
+
+ mgslpc_flush_buffer(tty);
+
+ tty_ldisc_flush(tty);
+ shutdown(info, tty);
+
+ tty_port_close_end(port, tty);
+ tty_port_tty_set(port, NULL);
+cleanup:
+ if (debug_level >= DEBUG_LEVEL_INFO)
+ printk("%s(%d):mgslpc_close(%s) exit, count=%d\n", __FILE__, __LINE__,
+ tty->driver->name, port->count);
+}
+
+/* Wait until the transmitter is empty.
+ */
+static void mgslpc_wait_until_sent(struct tty_struct *tty, int timeout)
+{
+ MGSLPC_INFO * info = (MGSLPC_INFO *)tty->driver_data;
+ unsigned long orig_jiffies, char_time;
+
+ if (!info)
+ return;
+
+ if (debug_level >= DEBUG_LEVEL_INFO)
+ printk("%s(%d):mgslpc_wait_until_sent(%s) entry\n",
+ __FILE__, __LINE__, info->device_name);
+
+ if (mgslpc_paranoia_check(info, tty->name, "mgslpc_wait_until_sent"))
+ return;
+
+ if (!tty_port_initialized(&info->port))
+ goto exit;
+
+ orig_jiffies = jiffies;
+
+ /* Set check interval to 1/5 of estimated time to
+ * send a character, and make it at least 1. The check
+ * interval should also be less than the timeout.
+ * Note: use tight timings here to satisfy the NIST-PCTS.
+ */
+
+ if (info->params.data_rate) {
+ char_time = info->timeout/(32 * 5);
+ if (!char_time)
+ char_time++;
+ } else
+ char_time = 1;
+
+ if (timeout)
+ char_time = min_t(unsigned long, char_time, timeout);
+
+ if (info->params.mode == MGSL_MODE_HDLC) {
+ while (info->tx_active) {
+ msleep_interruptible(jiffies_to_msecs(char_time));
+ if (signal_pending(current))
+ break;
+ if (timeout && time_after(jiffies, orig_jiffies + timeout))
+ break;
+ }
+ } else {
+ while ((info->tx_count || info->tx_active) &&
+ info->tx_enabled) {
+ msleep_interruptible(jiffies_to_msecs(char_time));
+ if (signal_pending(current))
+ break;
+ if (timeout && time_after(jiffies, orig_jiffies + timeout))
+ break;
+ }
+ }
+
+exit:
+ if (debug_level >= DEBUG_LEVEL_INFO)
+ printk("%s(%d):mgslpc_wait_until_sent(%s) exit\n",
+ __FILE__, __LINE__, info->device_name);
+}
+
+/* Called by tty_hangup() when a hangup is signaled.
+ * This is the same as closing all open files for the port.
+ */
+static void mgslpc_hangup(struct tty_struct *tty)
+{
+ MGSLPC_INFO * info = (MGSLPC_INFO *)tty->driver_data;
+
+ if (debug_level >= DEBUG_LEVEL_INFO)
+ printk("%s(%d):mgslpc_hangup(%s)\n",
+ __FILE__, __LINE__, info->device_name);
+
+ if (mgslpc_paranoia_check(info, tty->name, "mgslpc_hangup"))
+ return;
+
+ mgslpc_flush_buffer(tty);
+ shutdown(info, tty);
+ tty_port_hangup(&info->port);
+}
+
+static int carrier_raised(struct tty_port *port)
+{
+ MGSLPC_INFO *info = container_of(port, MGSLPC_INFO, port);
+ unsigned long flags;
+
+ spin_lock_irqsave(&info->lock, flags);
+ get_signals(info);
+ spin_unlock_irqrestore(&info->lock, flags);
+
+ if (info->serial_signals & SerialSignal_DCD)
+ return 1;
+ return 0;
+}
+
+static void dtr_rts(struct tty_port *port, int onoff)
+{
+ MGSLPC_INFO *info = container_of(port, MGSLPC_INFO, port);
+ unsigned long flags;
+
+ spin_lock_irqsave(&info->lock, flags);
+ if (onoff)
+ info->serial_signals |= SerialSignal_RTS | SerialSignal_DTR;
+ else
+ info->serial_signals &= ~(SerialSignal_RTS | SerialSignal_DTR);
+ set_signals(info);
+ spin_unlock_irqrestore(&info->lock, flags);
+}
+
+
+static int mgslpc_open(struct tty_struct *tty, struct file * filp)
+{
+ MGSLPC_INFO *info;
+ struct tty_port *port;
+ int retval, line;
+ unsigned long flags;
+
+ /* verify range of specified line number */
+ line = tty->index;
+ if (line >= mgslpc_device_count) {
+ printk("%s(%d):mgslpc_open with invalid line #%d.\n",
+ __FILE__, __LINE__, line);
+ return -ENODEV;
+ }
+
+ /* find the info structure for the specified line */
+ info = mgslpc_device_list;
+ while(info && info->line != line)
+ info = info->next_device;
+ if (mgslpc_paranoia_check(info, tty->name, "mgslpc_open"))
+ return -ENODEV;
+
+ port = &info->port;
+ tty->driver_data = info;
+ tty_port_tty_set(port, tty);
+
+ if (debug_level >= DEBUG_LEVEL_INFO)
+ printk("%s(%d):mgslpc_open(%s), old ref count = %d\n",
+ __FILE__, __LINE__, tty->driver->name, port->count);
+
+ spin_lock_irqsave(&info->netlock, flags);
+ if (info->netcount) {
+ retval = -EBUSY;
+ spin_unlock_irqrestore(&info->netlock, flags);
+ goto cleanup;
+ }
+ spin_lock(&port->lock);
+ port->count++;
+ spin_unlock(&port->lock);
+ spin_unlock_irqrestore(&info->netlock, flags);
+
+ if (port->count == 1) {
+ /* 1st open on this device, init hardware */
+ retval = startup(info, tty);
+ if (retval < 0)
+ goto cleanup;
+ }
+
+ retval = tty_port_block_til_ready(&info->port, tty, filp);
+ if (retval) {
+ if (debug_level >= DEBUG_LEVEL_INFO)
+ printk("%s(%d):block_til_ready(%s) returned %d\n",
+ __FILE__, __LINE__, info->device_name, retval);
+ goto cleanup;
+ }
+
+ if (debug_level >= DEBUG_LEVEL_INFO)
+ printk("%s(%d):mgslpc_open(%s) success\n",
+ __FILE__, __LINE__, info->device_name);
+ retval = 0;
+
+cleanup:
+ return retval;
+}
+
+/*
+ * /proc fs routines....
+ */
+
+static inline void line_info(struct seq_file *m, MGSLPC_INFO *info)
+{
+ char stat_buf[30];
+ unsigned long flags;
+
+ seq_printf(m, "%s:io:%04X irq:%d",
+ info->device_name, info->io_base, info->irq_level);
+
+ /* output current serial signal states */
+ spin_lock_irqsave(&info->lock, flags);
+ get_signals(info);
+ spin_unlock_irqrestore(&info->lock, flags);
+
+ stat_buf[0] = 0;
+ stat_buf[1] = 0;
+ if (info->serial_signals & SerialSignal_RTS)
+ strcat(stat_buf, "|RTS");
+ if (info->serial_signals & SerialSignal_CTS)
+ strcat(stat_buf, "|CTS");
+ if (info->serial_signals & SerialSignal_DTR)
+ strcat(stat_buf, "|DTR");
+ if (info->serial_signals & SerialSignal_DSR)
+ strcat(stat_buf, "|DSR");
+ if (info->serial_signals & SerialSignal_DCD)
+ strcat(stat_buf, "|CD");
+ if (info->serial_signals & SerialSignal_RI)
+ strcat(stat_buf, "|RI");
+
+ if (info->params.mode == MGSL_MODE_HDLC) {
+ seq_printf(m, " HDLC txok:%d rxok:%d",
+ info->icount.txok, info->icount.rxok);
+ if (info->icount.txunder)
+ seq_printf(m, " txunder:%d", info->icount.txunder);
+ if (info->icount.txabort)
+ seq_printf(m, " txabort:%d", info->icount.txabort);
+ if (info->icount.rxshort)
+ seq_printf(m, " rxshort:%d", info->icount.rxshort);
+ if (info->icount.rxlong)
+ seq_printf(m, " rxlong:%d", info->icount.rxlong);
+ if (info->icount.rxover)
+ seq_printf(m, " rxover:%d", info->icount.rxover);
+ if (info->icount.rxcrc)
+ seq_printf(m, " rxcrc:%d", info->icount.rxcrc);
+ } else {
+ seq_printf(m, " ASYNC tx:%d rx:%d",
+ info->icount.tx, info->icount.rx);
+ if (info->icount.frame)
+ seq_printf(m, " fe:%d", info->icount.frame);
+ if (info->icount.parity)
+ seq_printf(m, " pe:%d", info->icount.parity);
+ if (info->icount.brk)
+ seq_printf(m, " brk:%d", info->icount.brk);
+ if (info->icount.overrun)
+ seq_printf(m, " oe:%d", info->icount.overrun);
+ }
+
+ /* Append serial signal status to end */
+ seq_printf(m, " %s\n", stat_buf+1);
+
+ seq_printf(m, "txactive=%d bh_req=%d bh_run=%d pending_bh=%x\n",
+ info->tx_active,info->bh_requested,info->bh_running,
+ info->pending_bh);
+}
+
+/* Called to print information about devices
+ */
+static int mgslpc_proc_show(struct seq_file *m, void *v)
+{
+ MGSLPC_INFO *info;
+
+ seq_printf(m, "synclink driver:%s\n", driver_version);
+
+ info = mgslpc_device_list;
+ while (info) {
+ line_info(m, info);
+ info = info->next_device;
+ }
+ return 0;
+}
+
+static int rx_alloc_buffers(MGSLPC_INFO *info)
+{
+ /* each buffer has header and data */
+ info->rx_buf_size = sizeof(RXBUF) + info->max_frame_size;
+
+ /* calculate total allocation size for 8 buffers */
+ info->rx_buf_total_size = info->rx_buf_size * 8;
+
+ /* limit total allocated memory */
+ if (info->rx_buf_total_size > 0x10000)
+ info->rx_buf_total_size = 0x10000;
+
+ /* calculate number of buffers */
+ info->rx_buf_count = info->rx_buf_total_size / info->rx_buf_size;
+
+ info->rx_buf = kmalloc(info->rx_buf_total_size, GFP_KERNEL);
+ if (info->rx_buf == NULL)
+ return -ENOMEM;
+
+ /* unused flag buffer to satisfy receive_buf calling interface */
+ info->flag_buf = kzalloc(info->max_frame_size, GFP_KERNEL);
+ if (!info->flag_buf) {
+ kfree(info->rx_buf);
+ info->rx_buf = NULL;
+ return -ENOMEM;
+ }
+
+ rx_reset_buffers(info);
+ return 0;
+}
+
+static void rx_free_buffers(MGSLPC_INFO *info)
+{
+ kfree(info->rx_buf);
+ info->rx_buf = NULL;
+ kfree(info->flag_buf);
+ info->flag_buf = NULL;
+}
+
+static int claim_resources(MGSLPC_INFO *info)
+{
+ if (rx_alloc_buffers(info) < 0) {
+ printk("Can't allocate rx buffer %s\n", info->device_name);
+ release_resources(info);
+ return -ENODEV;
+ }
+ return 0;
+}
+
+static void release_resources(MGSLPC_INFO *info)
+{
+ if (debug_level >= DEBUG_LEVEL_INFO)
+ printk("release_resources(%s)\n", info->device_name);
+ rx_free_buffers(info);
+}
+
+/* Add the specified device instance data structure to the
+ * global linked list of devices and increment the device count.
+ *
+ * Arguments: info pointer to device instance data
+ */
+static int mgslpc_add_device(MGSLPC_INFO *info)
+{
+ MGSLPC_INFO *current_dev = NULL;
+ struct device *tty_dev;
+ int ret;
+
+ info->next_device = NULL;
+ info->line = mgslpc_device_count;
+ sprintf(info->device_name,"ttySLP%d",info->line);
+
+ if (info->line < MAX_DEVICE_COUNT) {
+ if (maxframe[info->line])
+ info->max_frame_size = maxframe[info->line];
+ }
+
+ mgslpc_device_count++;
+
+ if (!mgslpc_device_list)
+ mgslpc_device_list = info;
+ else {
+ current_dev = mgslpc_device_list;
+ while (current_dev->next_device)
+ current_dev = current_dev->next_device;
+ current_dev->next_device = info;
+ }
+
+ if (info->max_frame_size < 4096)
+ info->max_frame_size = 4096;
+ else if (info->max_frame_size > 65535)
+ info->max_frame_size = 65535;
+
+ printk("SyncLink PC Card %s:IO=%04X IRQ=%d\n",
+ info->device_name, info->io_base, info->irq_level);
+
+#if SYNCLINK_GENERIC_HDLC
+ ret = hdlcdev_init(info);
+ if (ret != 0)
+ goto failed;
+#endif
+
+ tty_dev = tty_port_register_device(&info->port, serial_driver, info->line,
+ &info->p_dev->dev);
+ if (IS_ERR(tty_dev)) {
+ ret = PTR_ERR(tty_dev);
+#if SYNCLINK_GENERIC_HDLC
+ hdlcdev_exit(info);
+#endif
+ goto failed;
+ }
+
+ return 0;
+
+failed:
+ if (current_dev)
+ current_dev->next_device = NULL;
+ else
+ mgslpc_device_list = NULL;
+ mgslpc_device_count--;
+ return ret;
+}
+
+static void mgslpc_remove_device(MGSLPC_INFO *remove_info)
+{
+ MGSLPC_INFO *info = mgslpc_device_list;
+ MGSLPC_INFO *last = NULL;
+
+ while(info) {
+ if (info == remove_info) {
+ if (last)
+ last->next_device = info->next_device;
+ else
+ mgslpc_device_list = info->next_device;
+ tty_unregister_device(serial_driver, info->line);
+#if SYNCLINK_GENERIC_HDLC
+ hdlcdev_exit(info);
+#endif
+ release_resources(info);
+ tty_port_destroy(&info->port);
+ kfree(info);
+ mgslpc_device_count--;
+ return;
+ }
+ last = info;
+ info = info->next_device;
+ }
+}
+
+static const struct pcmcia_device_id mgslpc_ids[] = {
+ PCMCIA_DEVICE_MANF_CARD(0x02c5, 0x0050),
+ PCMCIA_DEVICE_NULL
+};
+MODULE_DEVICE_TABLE(pcmcia, mgslpc_ids);
+
+static struct pcmcia_driver mgslpc_driver = {
+ .owner = THIS_MODULE,
+ .name = "synclink_cs",
+ .probe = mgslpc_probe,
+ .remove = mgslpc_detach,
+ .id_table = mgslpc_ids,
+ .suspend = mgslpc_suspend,
+ .resume = mgslpc_resume,
+};
+
+static const struct tty_operations mgslpc_ops = {
+ .open = mgslpc_open,
+ .close = mgslpc_close,
+ .write = mgslpc_write,
+ .put_char = mgslpc_put_char,
+ .flush_chars = mgslpc_flush_chars,
+ .write_room = mgslpc_write_room,
+ .chars_in_buffer = mgslpc_chars_in_buffer,
+ .flush_buffer = mgslpc_flush_buffer,
+ .ioctl = mgslpc_ioctl,
+ .throttle = mgslpc_throttle,
+ .unthrottle = mgslpc_unthrottle,
+ .send_xchar = mgslpc_send_xchar,
+ .break_ctl = mgslpc_break,
+ .wait_until_sent = mgslpc_wait_until_sent,
+ .set_termios = mgslpc_set_termios,
+ .stop = tx_pause,
+ .start = tx_release,
+ .hangup = mgslpc_hangup,
+ .tiocmget = tiocmget,
+ .tiocmset = tiocmset,
+ .get_icount = mgslpc_get_icount,
+ .proc_show = mgslpc_proc_show,
+};
+
+static int __init synclink_cs_init(void)
+{
+ int rc;
+
+ if (break_on_load) {
+ mgslpc_get_text_ptr();
+ BREAKPOINT();
+ }
+
+ serial_driver = tty_alloc_driver(MAX_DEVICE_COUNT,
+ TTY_DRIVER_REAL_RAW |
+ TTY_DRIVER_DYNAMIC_DEV);
+ if (IS_ERR(serial_driver)) {
+ rc = PTR_ERR(serial_driver);
+ goto err;
+ }
+
+ /* Initialize the tty_driver structure */
+ serial_driver->driver_name = "synclink_cs";
+ serial_driver->name = "ttySLP";
+ serial_driver->major = ttymajor;
+ serial_driver->minor_start = 64;
+ serial_driver->type = TTY_DRIVER_TYPE_SERIAL;
+ serial_driver->subtype = SERIAL_TYPE_NORMAL;
+ serial_driver->init_termios = tty_std_termios;
+ serial_driver->init_termios.c_cflag =
+ B9600 | CS8 | CREAD | HUPCL | CLOCAL;
+ tty_set_operations(serial_driver, &mgslpc_ops);
+
+ rc = tty_register_driver(serial_driver);
+ if (rc < 0) {
+ printk(KERN_ERR "%s(%d):Couldn't register serial driver\n",
+ __FILE__, __LINE__);
+ goto err_put_tty;
+ }
+
+ rc = pcmcia_register_driver(&mgslpc_driver);
+ if (rc < 0)
+ goto err_unreg_tty;
+
+ printk(KERN_INFO "%s %s, tty major#%d\n", driver_name, driver_version,
+ serial_driver->major);
+
+ return 0;
+err_unreg_tty:
+ tty_unregister_driver(serial_driver);
+err_put_tty:
+ tty_driver_kref_put(serial_driver);
+err:
+ return rc;
+}
+
+static void __exit synclink_cs_exit(void)
+{
+ pcmcia_unregister_driver(&mgslpc_driver);
+ tty_unregister_driver(serial_driver);
+ tty_driver_kref_put(serial_driver);
+}
+
+module_init(synclink_cs_init);
+module_exit(synclink_cs_exit);
+
+static void mgslpc_set_rate(MGSLPC_INFO *info, unsigned char channel, unsigned int rate)
+{
+ unsigned int M, N;
+ unsigned char val;
+
+ /* note:standard BRG mode is broken in V3.2 chip
+ * so enhanced mode is always used
+ */
+
+ if (rate) {
+ N = 3686400 / rate;
+ if (!N)
+ N = 1;
+ N >>= 1;
+ for (M = 1; N > 64 && M < 16; M++)
+ N >>= 1;
+ N--;
+
+ /* BGR[5..0] = N
+ * BGR[9..6] = M
+ * BGR[7..0] contained in BGR register
+ * BGR[9..8] contained in CCR2[7..6]
+ * divisor = (N+1)*2^M
+ *
+ * Note: M *must* not be zero (causes asymetric duty cycle)
+ */
+ write_reg(info, (unsigned char) (channel + BGR),
+ (unsigned char) ((M << 6) + N));
+ val = read_reg(info, (unsigned char) (channel + CCR2)) & 0x3f;
+ val |= ((M << 4) & 0xc0);
+ write_reg(info, (unsigned char) (channel + CCR2), val);
+ }
+}
+
+/* Enabled the AUX clock output at the specified frequency.
+ */
+static void enable_auxclk(MGSLPC_INFO *info)
+{
+ unsigned char val;
+
+ /* MODE
+ *
+ * 07..06 MDS[1..0] 10 = transparent HDLC mode
+ * 05 ADM Address Mode, 0 = no addr recognition
+ * 04 TMD Timer Mode, 0 = external
+ * 03 RAC Receiver Active, 0 = inactive
+ * 02 RTS 0=RTS active during xmit, 1=RTS always active
+ * 01 TRS Timer Resolution, 1=512
+ * 00 TLP Test Loop, 0 = no loop
+ *
+ * 1000 0010
+ */
+ val = 0x82;
+
+ /* channel B RTS is used to enable AUXCLK driver on SP505 */
+ if (info->params.mode == MGSL_MODE_HDLC && info->params.clock_speed)
+ val |= BIT2;
+ write_reg(info, CHB + MODE, val);
+
+ /* CCR0
+ *
+ * 07 PU Power Up, 1=active, 0=power down
+ * 06 MCE Master Clock Enable, 1=enabled
+ * 05 Reserved, 0
+ * 04..02 SC[2..0] Encoding
+ * 01..00 SM[1..0] Serial Mode, 00=HDLC
+ *
+ * 11000000
+ */
+ write_reg(info, CHB + CCR0, 0xc0);
+
+ /* CCR1
+ *
+ * 07 SFLG Shared Flag, 0 = disable shared flags
+ * 06 GALP Go Active On Loop, 0 = not used
+ * 05 GLP Go On Loop, 0 = not used
+ * 04 ODS Output Driver Select, 1=TxD is push-pull output
+ * 03 ITF Interframe Time Fill, 0=mark, 1=flag
+ * 02..00 CM[2..0] Clock Mode
+ *
+ * 0001 0111
+ */
+ write_reg(info, CHB + CCR1, 0x17);
+
+ /* CCR2 (Channel B)
+ *
+ * 07..06 BGR[9..8] Baud rate bits 9..8
+ * 05 BDF Baud rate divisor factor, 0=1, 1=BGR value
+ * 04 SSEL Clock source select, 1=submode b
+ * 03 TOE 0=TxCLK is input, 1=TxCLK is output
+ * 02 RWX Read/Write Exchange 0=disabled
+ * 01 C32, CRC select, 0=CRC-16, 1=CRC-32
+ * 00 DIV, data inversion 0=disabled, 1=enabled
+ *
+ * 0011 1000
+ */
+ if (info->params.mode == MGSL_MODE_HDLC && info->params.clock_speed)
+ write_reg(info, CHB + CCR2, 0x38);
+ else
+ write_reg(info, CHB + CCR2, 0x30);
+
+ /* CCR4
+ *
+ * 07 MCK4 Master Clock Divide by 4, 1=enabled
+ * 06 EBRG Enhanced Baud Rate Generator Mode, 1=enabled
+ * 05 TST1 Test Pin, 0=normal operation
+ * 04 ICD Ivert Carrier Detect, 1=enabled (active low)
+ * 03..02 Reserved, must be 0
+ * 01..00 RFT[1..0] RxFIFO Threshold 00=32 bytes
+ *
+ * 0101 0000
+ */
+ write_reg(info, CHB + CCR4, 0x50);
+
+ /* if auxclk not enabled, set internal BRG so
+ * CTS transitions can be detected (requires TxC)
+ */
+ if (info->params.mode == MGSL_MODE_HDLC && info->params.clock_speed)
+ mgslpc_set_rate(info, CHB, info->params.clock_speed);
+ else
+ mgslpc_set_rate(info, CHB, 921600);
+}
+
+static void loopback_enable(MGSLPC_INFO *info)
+{
+ unsigned char val;
+
+ /* CCR1:02..00 CM[2..0] Clock Mode = 111 (clock mode 7) */
+ val = read_reg(info, CHA + CCR1) | (BIT2 | BIT1 | BIT0);
+ write_reg(info, CHA + CCR1, val);
+
+ /* CCR2:04 SSEL Clock source select, 1=submode b */
+ val = read_reg(info, CHA + CCR2) | (BIT4 | BIT5);
+ write_reg(info, CHA + CCR2, val);
+
+ /* set LinkSpeed if available, otherwise default to 2Mbps */
+ if (info->params.clock_speed)
+ mgslpc_set_rate(info, CHA, info->params.clock_speed);
+ else
+ mgslpc_set_rate(info, CHA, 1843200);
+
+ /* MODE:00 TLP Test Loop, 1=loopback enabled */
+ val = read_reg(info, CHA + MODE) | BIT0;
+ write_reg(info, CHA + MODE, val);
+}
+
+static void hdlc_mode(MGSLPC_INFO *info)
+{
+ unsigned char val;
+ unsigned char clkmode, clksubmode;
+
+ /* disable all interrupts */
+ irq_disable(info, CHA, 0xffff);
+ irq_disable(info, CHB, 0xffff);
+ port_irq_disable(info, 0xff);
+
+ /* assume clock mode 0a, rcv=RxC xmt=TxC */
+ clkmode = clksubmode = 0;
+ if (info->params.flags & HDLC_FLAG_RXC_DPLL
+ && info->params.flags & HDLC_FLAG_TXC_DPLL) {
+ /* clock mode 7a, rcv = DPLL, xmt = DPLL */
+ clkmode = 7;
+ } else if (info->params.flags & HDLC_FLAG_RXC_BRG
+ && info->params.flags & HDLC_FLAG_TXC_BRG) {
+ /* clock mode 7b, rcv = BRG, xmt = BRG */
+ clkmode = 7;
+ clksubmode = 1;
+ } else if (info->params.flags & HDLC_FLAG_RXC_DPLL) {
+ if (info->params.flags & HDLC_FLAG_TXC_BRG) {
+ /* clock mode 6b, rcv = DPLL, xmt = BRG/16 */
+ clkmode = 6;
+ clksubmode = 1;
+ } else {
+ /* clock mode 6a, rcv = DPLL, xmt = TxC */
+ clkmode = 6;
+ }
+ } else if (info->params.flags & HDLC_FLAG_TXC_BRG) {
+ /* clock mode 0b, rcv = RxC, xmt = BRG */
+ clksubmode = 1;
+ }
+
+ /* MODE
+ *
+ * 07..06 MDS[1..0] 10 = transparent HDLC mode
+ * 05 ADM Address Mode, 0 = no addr recognition
+ * 04 TMD Timer Mode, 0 = external
+ * 03 RAC Receiver Active, 0 = inactive
+ * 02 RTS 0=RTS active during xmit, 1=RTS always active
+ * 01 TRS Timer Resolution, 1=512
+ * 00 TLP Test Loop, 0 = no loop
+ *
+ * 1000 0010
+ */
+ val = 0x82;
+ if (info->params.loopback)
+ val |= BIT0;
+
+ /* preserve RTS state */
+ if (info->serial_signals & SerialSignal_RTS)
+ val |= BIT2;
+ write_reg(info, CHA + MODE, val);
+
+ /* CCR0
+ *
+ * 07 PU Power Up, 1=active, 0=power down
+ * 06 MCE Master Clock Enable, 1=enabled
+ * 05 Reserved, 0
+ * 04..02 SC[2..0] Encoding
+ * 01..00 SM[1..0] Serial Mode, 00=HDLC
+ *
+ * 11000000
+ */
+ val = 0xc0;
+ switch (info->params.encoding)
+ {
+ case HDLC_ENCODING_NRZI:
+ val |= BIT3;
+ break;
+ case HDLC_ENCODING_BIPHASE_SPACE:
+ val |= BIT4;
+ break; // FM0
+ case HDLC_ENCODING_BIPHASE_MARK:
+ val |= BIT4 | BIT2;
+ break; // FM1
+ case HDLC_ENCODING_BIPHASE_LEVEL:
+ val |= BIT4 | BIT3;
+ break; // Manchester
+ }
+ write_reg(info, CHA + CCR0, val);
+
+ /* CCR1
+ *
+ * 07 SFLG Shared Flag, 0 = disable shared flags
+ * 06 GALP Go Active On Loop, 0 = not used
+ * 05 GLP Go On Loop, 0 = not used
+ * 04 ODS Output Driver Select, 1=TxD is push-pull output
+ * 03 ITF Interframe Time Fill, 0=mark, 1=flag
+ * 02..00 CM[2..0] Clock Mode
+ *
+ * 0001 0000
+ */
+ val = 0x10 + clkmode;
+ write_reg(info, CHA + CCR1, val);
+
+ /* CCR2
+ *
+ * 07..06 BGR[9..8] Baud rate bits 9..8
+ * 05 BDF Baud rate divisor factor, 0=1, 1=BGR value
+ * 04 SSEL Clock source select, 1=submode b
+ * 03 TOE 0=TxCLK is input, 0=TxCLK is input
+ * 02 RWX Read/Write Exchange 0=disabled
+ * 01 C32, CRC select, 0=CRC-16, 1=CRC-32
+ * 00 DIV, data inversion 0=disabled, 1=enabled
+ *
+ * 0000 0000
+ */
+ val = 0x00;
+ if (clkmode == 2 || clkmode == 3 || clkmode == 6
+ || clkmode == 7 || (clkmode == 0 && clksubmode == 1))
+ val |= BIT5;
+ if (clksubmode)
+ val |= BIT4;
+ if (info->params.crc_type == HDLC_CRC_32_CCITT)
+ val |= BIT1;
+ if (info->params.encoding == HDLC_ENCODING_NRZB)
+ val |= BIT0;
+ write_reg(info, CHA + CCR2, val);
+
+ /* CCR3
+ *
+ * 07..06 PRE[1..0] Preamble count 00=1, 01=2, 10=4, 11=8
+ * 05 EPT Enable preamble transmission, 1=enabled
+ * 04 RADD Receive address pushed to FIFO, 0=disabled
+ * 03 CRL CRC Reset Level, 0=FFFF
+ * 02 RCRC Rx CRC 0=On 1=Off
+ * 01 TCRC Tx CRC 0=On 1=Off
+ * 00 PSD DPLL Phase Shift Disable
+ *
+ * 0000 0000
+ */
+ val = 0x00;
+ if (info->params.crc_type == HDLC_CRC_NONE)
+ val |= BIT2 | BIT1;
+ if (info->params.preamble != HDLC_PREAMBLE_PATTERN_NONE)
+ val |= BIT5;
+ switch (info->params.preamble_length)
+ {
+ case HDLC_PREAMBLE_LENGTH_16BITS:
+ val |= BIT6;
+ break;
+ case HDLC_PREAMBLE_LENGTH_32BITS:
+ val |= BIT6;
+ break;
+ case HDLC_PREAMBLE_LENGTH_64BITS:
+ val |= BIT7 | BIT6;
+ break;
+ }
+ write_reg(info, CHA + CCR3, val);
+
+ /* PRE - Preamble pattern */
+ val = 0;
+ switch (info->params.preamble)
+ {
+ case HDLC_PREAMBLE_PATTERN_FLAGS: val = 0x7e; break;
+ case HDLC_PREAMBLE_PATTERN_10: val = 0xaa; break;
+ case HDLC_PREAMBLE_PATTERN_01: val = 0x55; break;
+ case HDLC_PREAMBLE_PATTERN_ONES: val = 0xff; break;
+ }
+ write_reg(info, CHA + PRE, val);
+
+ /* CCR4
+ *
+ * 07 MCK4 Master Clock Divide by 4, 1=enabled
+ * 06 EBRG Enhanced Baud Rate Generator Mode, 1=enabled
+ * 05 TST1 Test Pin, 0=normal operation
+ * 04 ICD Ivert Carrier Detect, 1=enabled (active low)
+ * 03..02 Reserved, must be 0
+ * 01..00 RFT[1..0] RxFIFO Threshold 00=32 bytes
+ *
+ * 0101 0000
+ */
+ val = 0x50;
+ write_reg(info, CHA + CCR4, val);
+ if (info->params.flags & HDLC_FLAG_RXC_DPLL)
+ mgslpc_set_rate(info, CHA, info->params.clock_speed * 16);
+ else
+ mgslpc_set_rate(info, CHA, info->params.clock_speed);
+
+ /* RLCR Receive length check register
+ *
+ * 7 1=enable receive length check
+ * 6..0 Max frame length = (RL + 1) * 32
+ */
+ write_reg(info, CHA + RLCR, 0);
+
+ /* XBCH Transmit Byte Count High
+ *
+ * 07 DMA mode, 0 = interrupt driven
+ * 06 NRM, 0=ABM (ignored)
+ * 05 CAS Carrier Auto Start
+ * 04 XC Transmit Continuously (ignored)
+ * 03..00 XBC[10..8] Transmit byte count bits 10..8
+ *
+ * 0000 0000
+ */
+ val = 0x00;
+ if (info->params.flags & HDLC_FLAG_AUTO_DCD)
+ val |= BIT5;
+ write_reg(info, CHA + XBCH, val);
+ enable_auxclk(info);
+ if (info->params.loopback || info->testing_irq)
+ loopback_enable(info);
+ if (info->params.flags & HDLC_FLAG_AUTO_CTS)
+ {
+ irq_enable(info, CHB, IRQ_CTS);
+ /* PVR[3] 1=AUTO CTS active */
+ set_reg_bits(info, CHA + PVR, BIT3);
+ } else
+ clear_reg_bits(info, CHA + PVR, BIT3);
+
+ irq_enable(info, CHA,
+ IRQ_RXEOM | IRQ_RXFIFO | IRQ_ALLSENT |
+ IRQ_UNDERRUN | IRQ_TXFIFO);
+ issue_command(info, CHA, CMD_TXRESET + CMD_RXRESET);
+ wait_command_complete(info, CHA);
+ read_reg16(info, CHA + ISR); /* clear pending IRQs */
+
+ /* Master clock mode enabled above to allow reset commands
+ * to complete even if no data clocks are present.
+ *
+ * Disable master clock mode for normal communications because
+ * V3.2 of the ESCC2 has a bug that prevents the transmit all sent
+ * IRQ when in master clock mode.
+ *
+ * Leave master clock mode enabled for IRQ test because the
+ * timer IRQ used by the test can only happen in master clock mode.
+ */
+ if (!info->testing_irq)
+ clear_reg_bits(info, CHA + CCR0, BIT6);
+
+ tx_set_idle(info);
+
+ tx_stop(info);
+ rx_stop(info);
+}
+
+static void rx_stop(MGSLPC_INFO *info)
+{
+ if (debug_level >= DEBUG_LEVEL_ISR)
+ printk("%s(%d):rx_stop(%s)\n",
+ __FILE__, __LINE__, info->device_name);
+
+ /* MODE:03 RAC Receiver Active, 0=inactive */
+ clear_reg_bits(info, CHA + MODE, BIT3);
+
+ info->rx_enabled = false;
+ info->rx_overflow = false;
+}
+
+static void rx_start(MGSLPC_INFO *info)
+{
+ if (debug_level >= DEBUG_LEVEL_ISR)
+ printk("%s(%d):rx_start(%s)\n",
+ __FILE__, __LINE__, info->device_name);
+
+ rx_reset_buffers(info);
+ info->rx_enabled = false;
+ info->rx_overflow = false;
+
+ /* MODE:03 RAC Receiver Active, 1=active */
+ set_reg_bits(info, CHA + MODE, BIT3);
+
+ info->rx_enabled = true;
+}
+
+static void tx_start(MGSLPC_INFO *info, struct tty_struct *tty)
+{
+ if (debug_level >= DEBUG_LEVEL_ISR)
+ printk("%s(%d):tx_start(%s)\n",
+ __FILE__, __LINE__, info->device_name);
+
+ if (info->tx_count) {
+ /* If auto RTS enabled and RTS is inactive, then assert */
+ /* RTS and set a flag indicating that the driver should */
+ /* negate RTS when the transmission completes. */
+ info->drop_rts_on_tx_done = false;
+
+ if (info->params.flags & HDLC_FLAG_AUTO_RTS) {
+ get_signals(info);
+ if (!(info->serial_signals & SerialSignal_RTS)) {
+ info->serial_signals |= SerialSignal_RTS;
+ set_signals(info);
+ info->drop_rts_on_tx_done = true;
+ }
+ }
+
+ if (info->params.mode == MGSL_MODE_ASYNC) {
+ if (!info->tx_active) {
+ info->tx_active = true;
+ tx_ready(info, tty);
+ }
+ } else {
+ info->tx_active = true;
+ tx_ready(info, tty);
+ mod_timer(&info->tx_timer, jiffies +
+ msecs_to_jiffies(5000));
+ }
+ }
+
+ if (!info->tx_enabled)
+ info->tx_enabled = true;
+}
+
+static void tx_stop(MGSLPC_INFO *info)
+{
+ if (debug_level >= DEBUG_LEVEL_ISR)
+ printk("%s(%d):tx_stop(%s)\n",
+ __FILE__, __LINE__, info->device_name);
+
+ del_timer(&info->tx_timer);
+
+ info->tx_enabled = false;
+ info->tx_active = false;
+}
+
+/* Reset the adapter to a known state and prepare it for further use.
+ */
+static void reset_device(MGSLPC_INFO *info)
+{
+ /* power up both channels (set BIT7) */
+ write_reg(info, CHA + CCR0, 0x80);
+ write_reg(info, CHB + CCR0, 0x80);
+ write_reg(info, CHA + MODE, 0);
+ write_reg(info, CHB + MODE, 0);
+
+ /* disable all interrupts */
+ irq_disable(info, CHA, 0xffff);
+ irq_disable(info, CHB, 0xffff);
+ port_irq_disable(info, 0xff);
+
+ /* PCR Port Configuration Register
+ *
+ * 07..04 DEC[3..0] Serial I/F select outputs
+ * 03 output, 1=AUTO CTS control enabled
+ * 02 RI Ring Indicator input 0=active
+ * 01 DSR input 0=active
+ * 00 DTR output 0=active
+ *
+ * 0000 0110
+ */
+ write_reg(info, PCR, 0x06);
+
+ /* PVR Port Value Register
+ *
+ * 07..04 DEC[3..0] Serial I/F select (0000=disabled)
+ * 03 AUTO CTS output 1=enabled
+ * 02 RI Ring Indicator input
+ * 01 DSR input
+ * 00 DTR output (1=inactive)
+ *
+ * 0000 0001
+ */
+// write_reg(info, PVR, PVR_DTR);
+
+ /* IPC Interrupt Port Configuration
+ *
+ * 07 VIS 1=Masked interrupts visible
+ * 06..05 Reserved, 0
+ * 04..03 SLA Slave address, 00 ignored
+ * 02 CASM Cascading Mode, 1=daisy chain
+ * 01..00 IC[1..0] Interrupt Config, 01=push-pull output, active low
+ *
+ * 0000 0101
+ */
+ write_reg(info, IPC, 0x05);
+}
+
+static void async_mode(MGSLPC_INFO *info)
+{
+ unsigned char val;
+
+ /* disable all interrupts */
+ irq_disable(info, CHA, 0xffff);
+ irq_disable(info, CHB, 0xffff);
+ port_irq_disable(info, 0xff);
+
+ /* MODE
+ *
+ * 07 Reserved, 0
+ * 06 FRTS RTS State, 0=active
+ * 05 FCTS Flow Control on CTS
+ * 04 FLON Flow Control Enable
+ * 03 RAC Receiver Active, 0 = inactive
+ * 02 RTS 0=Auto RTS, 1=manual RTS
+ * 01 TRS Timer Resolution, 1=512
+ * 00 TLP Test Loop, 0 = no loop
+ *
+ * 0000 0110
+ */
+ val = 0x06;
+ if (info->params.loopback)
+ val |= BIT0;
+
+ /* preserve RTS state */
+ if (!(info->serial_signals & SerialSignal_RTS))
+ val |= BIT6;
+ write_reg(info, CHA + MODE, val);
+
+ /* CCR0
+ *
+ * 07 PU Power Up, 1=active, 0=power down
+ * 06 MCE Master Clock Enable, 1=enabled
+ * 05 Reserved, 0
+ * 04..02 SC[2..0] Encoding, 000=NRZ
+ * 01..00 SM[1..0] Serial Mode, 11=Async
+ *
+ * 1000 0011
+ */
+ write_reg(info, CHA + CCR0, 0x83);
+
+ /* CCR1
+ *
+ * 07..05 Reserved, 0
+ * 04 ODS Output Driver Select, 1=TxD is push-pull output
+ * 03 BCR Bit Clock Rate, 1=16x
+ * 02..00 CM[2..0] Clock Mode, 111=BRG
+ *
+ * 0001 1111
+ */
+ write_reg(info, CHA + CCR1, 0x1f);
+
+ /* CCR2 (channel A)
+ *
+ * 07..06 BGR[9..8] Baud rate bits 9..8
+ * 05 BDF Baud rate divisor factor, 0=1, 1=BGR value
+ * 04 SSEL Clock source select, 1=submode b
+ * 03 TOE 0=TxCLK is input, 0=TxCLK is input
+ * 02 RWX Read/Write Exchange 0=disabled
+ * 01 Reserved, 0
+ * 00 DIV, data inversion 0=disabled, 1=enabled
+ *
+ * 0001 0000
+ */
+ write_reg(info, CHA + CCR2, 0x10);
+
+ /* CCR3
+ *
+ * 07..01 Reserved, 0
+ * 00 PSD DPLL Phase Shift Disable
+ *
+ * 0000 0000
+ */
+ write_reg(info, CHA + CCR3, 0);
+
+ /* CCR4
+ *
+ * 07 MCK4 Master Clock Divide by 4, 1=enabled
+ * 06 EBRG Enhanced Baud Rate Generator Mode, 1=enabled
+ * 05 TST1 Test Pin, 0=normal operation
+ * 04 ICD Ivert Carrier Detect, 1=enabled (active low)
+ * 03..00 Reserved, must be 0
+ *
+ * 0101 0000
+ */
+ write_reg(info, CHA + CCR4, 0x50);
+ mgslpc_set_rate(info, CHA, info->params.data_rate * 16);
+
+ /* DAFO Data Format
+ *
+ * 07 Reserved, 0
+ * 06 XBRK transmit break, 0=normal operation
+ * 05 Stop bits (0=1, 1=2)
+ * 04..03 PAR[1..0] Parity (01=odd, 10=even)
+ * 02 PAREN Parity Enable
+ * 01..00 CHL[1..0] Character Length (00=8, 01=7)
+ *
+ */
+ val = 0x00;
+ if (info->params.data_bits != 8)
+ val |= BIT0; /* 7 bits */
+ if (info->params.stop_bits != 1)
+ val |= BIT5;
+ if (info->params.parity != ASYNC_PARITY_NONE)
+ {
+ val |= BIT2; /* Parity enable */
+ if (info->params.parity == ASYNC_PARITY_ODD)
+ val |= BIT3;
+ else
+ val |= BIT4;
+ }
+ write_reg(info, CHA + DAFO, val);
+
+ /* RFC Rx FIFO Control
+ *
+ * 07 Reserved, 0
+ * 06 DPS, 1=parity bit not stored in data byte
+ * 05 DXS, 0=all data stored in FIFO (including XON/XOFF)
+ * 04 RFDF Rx FIFO Data Format, 1=status byte stored in FIFO
+ * 03..02 RFTH[1..0], rx threshold, 11=16 status + 16 data byte
+ * 01 Reserved, 0
+ * 00 TCDE Terminate Char Detect Enable, 0=disabled
+ *
+ * 0101 1100
+ */
+ write_reg(info, CHA + RFC, 0x5c);
+
+ /* RLCR Receive length check register
+ *
+ * Max frame length = (RL + 1) * 32
+ */
+ write_reg(info, CHA + RLCR, 0);
+
+ /* XBCH Transmit Byte Count High
+ *
+ * 07 DMA mode, 0 = interrupt driven
+ * 06 NRM, 0=ABM (ignored)
+ * 05 CAS Carrier Auto Start
+ * 04 XC Transmit Continuously (ignored)
+ * 03..00 XBC[10..8] Transmit byte count bits 10..8
+ *
+ * 0000 0000
+ */
+ val = 0x00;
+ if (info->params.flags & HDLC_FLAG_AUTO_DCD)
+ val |= BIT5;
+ write_reg(info, CHA + XBCH, val);
+ if (info->params.flags & HDLC_FLAG_AUTO_CTS)
+ irq_enable(info, CHA, IRQ_CTS);
+
+ /* MODE:03 RAC Receiver Active, 1=active */
+ set_reg_bits(info, CHA + MODE, BIT3);
+ enable_auxclk(info);
+ if (info->params.flags & HDLC_FLAG_AUTO_CTS) {
+ irq_enable(info, CHB, IRQ_CTS);
+ /* PVR[3] 1=AUTO CTS active */
+ set_reg_bits(info, CHA + PVR, BIT3);
+ } else
+ clear_reg_bits(info, CHA + PVR, BIT3);
+ irq_enable(info, CHA,
+ IRQ_RXEOM | IRQ_RXFIFO | IRQ_BREAK_ON | IRQ_RXTIME |
+ IRQ_ALLSENT | IRQ_TXFIFO);
+ issue_command(info, CHA, CMD_TXRESET + CMD_RXRESET);
+ wait_command_complete(info, CHA);
+ read_reg16(info, CHA + ISR); /* clear pending IRQs */
+}
+
+/* Set the HDLC idle mode for the transmitter.
+ */
+static void tx_set_idle(MGSLPC_INFO *info)
+{
+ /* Note: ESCC2 only supports flags and one idle modes */
+ if (info->idle_mode == HDLC_TXIDLE_FLAGS)
+ set_reg_bits(info, CHA + CCR1, BIT3);
+ else
+ clear_reg_bits(info, CHA + CCR1, BIT3);
+}
+
+/* get state of the V24 status (input) signals.
+ */
+static void get_signals(MGSLPC_INFO *info)
+{
+ unsigned char status = 0;
+
+ /* preserve RTS and DTR */
+ info->serial_signals &= SerialSignal_RTS | SerialSignal_DTR;
+
+ if (read_reg(info, CHB + VSTR) & BIT7)
+ info->serial_signals |= SerialSignal_DCD;
+ if (read_reg(info, CHB + STAR) & BIT1)
+ info->serial_signals |= SerialSignal_CTS;
+
+ status = read_reg(info, CHA + PVR);
+ if (!(status & PVR_RI))
+ info->serial_signals |= SerialSignal_RI;
+ if (!(status & PVR_DSR))
+ info->serial_signals |= SerialSignal_DSR;
+}
+
+/* Set the state of RTS and DTR based on contents of
+ * serial_signals member of device extension.
+ */
+static void set_signals(MGSLPC_INFO *info)
+{
+ unsigned char val;
+
+ val = read_reg(info, CHA + MODE);
+ if (info->params.mode == MGSL_MODE_ASYNC) {
+ if (info->serial_signals & SerialSignal_RTS)
+ val &= ~BIT6;
+ else
+ val |= BIT6;
+ } else {
+ if (info->serial_signals & SerialSignal_RTS)
+ val |= BIT2;
+ else
+ val &= ~BIT2;
+ }
+ write_reg(info, CHA + MODE, val);
+
+ if (info->serial_signals & SerialSignal_DTR)
+ clear_reg_bits(info, CHA + PVR, PVR_DTR);
+ else
+ set_reg_bits(info, CHA + PVR, PVR_DTR);
+}
+
+static void rx_reset_buffers(MGSLPC_INFO *info)
+{
+ RXBUF *buf;
+ int i;
+
+ info->rx_put = 0;
+ info->rx_get = 0;
+ info->rx_frame_count = 0;
+ for (i=0 ; i < info->rx_buf_count ; i++) {
+ buf = (RXBUF*)(info->rx_buf + (i * info->rx_buf_size));
+ buf->status = buf->count = 0;
+ }
+}
+
+/* Attempt to return a received HDLC frame
+ * Only frames received without errors are returned.
+ *
+ * Returns true if frame returned, otherwise false
+ */
+static bool rx_get_frame(MGSLPC_INFO *info, struct tty_struct *tty)
+{
+ unsigned short status;
+ RXBUF *buf;
+ unsigned int framesize = 0;
+ unsigned long flags;
+ bool return_frame = false;
+
+ if (info->rx_frame_count == 0)
+ return false;
+
+ buf = (RXBUF*)(info->rx_buf + (info->rx_get * info->rx_buf_size));
+
+ status = buf->status;
+
+ /* 07 VFR 1=valid frame
+ * 06 RDO 1=data overrun
+ * 05 CRC 1=OK, 0=error
+ * 04 RAB 1=frame aborted
+ */
+ if ((status & 0xf0) != 0xA0) {
+ if (!(status & BIT7) || (status & BIT4))
+ info->icount.rxabort++;
+ else if (status & BIT6)
+ info->icount.rxover++;
+ else if (!(status & BIT5)) {
+ info->icount.rxcrc++;
+ if (info->params.crc_type & HDLC_CRC_RETURN_EX)
+ return_frame = true;
+ }
+ framesize = 0;
+#if SYNCLINK_GENERIC_HDLC
+ {
+ info->netdev->stats.rx_errors++;
+ info->netdev->stats.rx_frame_errors++;
+ }
+#endif
+ } else
+ return_frame = true;
+
+ if (return_frame)
+ framesize = buf->count;
+
+ if (debug_level >= DEBUG_LEVEL_BH)
+ printk("%s(%d):rx_get_frame(%s) status=%04X size=%d\n",
+ __FILE__, __LINE__, info->device_name, status, framesize);
+
+ if (debug_level >= DEBUG_LEVEL_DATA)
+ trace_block(info, buf->data, framesize, 0);
+
+ if (framesize) {
+ if ((info->params.crc_type & HDLC_CRC_RETURN_EX &&
+ framesize+1 > info->max_frame_size) ||
+ framesize > info->max_frame_size)
+ info->icount.rxlong++;
+ else {
+ if (status & BIT5)
+ info->icount.rxok++;
+
+ if (info->params.crc_type & HDLC_CRC_RETURN_EX) {
+ *(buf->data + framesize) = status & BIT5 ? RX_OK:RX_CRC_ERROR;
+ ++framesize;
+ }
+
+#if SYNCLINK_GENERIC_HDLC
+ if (info->netcount)
+ hdlcdev_rx(info, buf->data, framesize);
+ else
+#endif
+ ldisc_receive_buf(tty, buf->data, info->flag_buf, framesize);
+ }
+ }
+
+ spin_lock_irqsave(&info->lock, flags);
+ buf->status = buf->count = 0;
+ info->rx_frame_count--;
+ info->rx_get++;
+ if (info->rx_get >= info->rx_buf_count)
+ info->rx_get = 0;
+ spin_unlock_irqrestore(&info->lock, flags);
+
+ return true;
+}
+
+static bool register_test(MGSLPC_INFO *info)
+{
+ static unsigned char patterns[] =
+ { 0x00, 0xff, 0xaa, 0x55, 0x69, 0x96, 0x0f };
+ static unsigned int count = ARRAY_SIZE(patterns);
+ unsigned int i;
+ bool rc = true;
+ unsigned long flags;
+
+ spin_lock_irqsave(&info->lock, flags);
+ reset_device(info);
+
+ for (i = 0; i < count; i++) {
+ write_reg(info, XAD1, patterns[i]);
+ write_reg(info, XAD2, patterns[(i + 1) % count]);
+ if ((read_reg(info, XAD1) != patterns[i]) ||
+ (read_reg(info, XAD2) != patterns[(i + 1) % count])) {
+ rc = false;
+ break;
+ }
+ }
+
+ spin_unlock_irqrestore(&info->lock, flags);
+ return rc;
+}
+
+static bool irq_test(MGSLPC_INFO *info)
+{
+ unsigned long end_time;
+ unsigned long flags;
+
+ spin_lock_irqsave(&info->lock, flags);
+ reset_device(info);
+
+ info->testing_irq = true;
+ hdlc_mode(info);
+
+ info->irq_occurred = false;
+
+ /* init hdlc mode */
+
+ irq_enable(info, CHA, IRQ_TIMER);
+ write_reg(info, CHA + TIMR, 0); /* 512 cycles */
+ issue_command(info, CHA, CMD_START_TIMER);
+
+ spin_unlock_irqrestore(&info->lock, flags);
+
+ end_time=100;
+ while(end_time-- && !info->irq_occurred) {
+ msleep_interruptible(10);
+ }
+
+ info->testing_irq = false;
+
+ spin_lock_irqsave(&info->lock, flags);
+ reset_device(info);
+ spin_unlock_irqrestore(&info->lock, flags);
+
+ return info->irq_occurred;
+}
+
+static int adapter_test(MGSLPC_INFO *info)
+{
+ if (!register_test(info)) {
+ info->init_error = DiagStatus_AddressFailure;
+ printk("%s(%d):Register test failure for device %s Addr=%04X\n",
+ __FILE__, __LINE__, info->device_name, (unsigned short)(info->io_base));
+ return -ENODEV;
+ }
+
+ if (!irq_test(info)) {
+ info->init_error = DiagStatus_IrqFailure;
+ printk("%s(%d):Interrupt test failure for device %s IRQ=%d\n",
+ __FILE__, __LINE__, info->device_name, (unsigned short)(info->irq_level));
+ return -ENODEV;
+ }
+
+ if (debug_level >= DEBUG_LEVEL_INFO)
+ printk("%s(%d):device %s passed diagnostics\n",
+ __FILE__, __LINE__, info->device_name);
+ return 0;
+}
+
+static void trace_block(MGSLPC_INFO *info,const char* data, int count, int xmit)
+{
+ int i;
+ int linecount;
+ if (xmit)
+ printk("%s tx data:\n", info->device_name);
+ else
+ printk("%s rx data:\n", info->device_name);
+
+ while(count) {
+ if (count > 16)
+ linecount = 16;
+ else
+ linecount = count;
+
+ for(i=0;i<linecount;i++)
+ printk("%02X ", (unsigned char)data[i]);
+ for(;i<17;i++)
+ printk(" ");
+ for(i=0;i<linecount;i++) {
+ if (data[i]>=040 && data[i]<=0176)
+ printk("%c", data[i]);
+ else
+ printk(".");
+ }
+ printk("\n");
+
+ data += linecount;
+ count -= linecount;
+ }
+}
+
+/* HDLC frame time out
+ * update stats and do tx completion processing
+ */
+static void tx_timeout(struct timer_list *t)
+{
+ MGSLPC_INFO *info = from_timer(info, t, tx_timer);
+ unsigned long flags;
+
+ if (debug_level >= DEBUG_LEVEL_INFO)
+ printk("%s(%d):tx_timeout(%s)\n",
+ __FILE__, __LINE__, info->device_name);
+ if (info->tx_active &&
+ info->params.mode == MGSL_MODE_HDLC) {
+ info->icount.txtimeout++;
+ }
+ spin_lock_irqsave(&info->lock, flags);
+ info->tx_active = false;
+ info->tx_count = info->tx_put = info->tx_get = 0;
+
+ spin_unlock_irqrestore(&info->lock, flags);
+
+#if SYNCLINK_GENERIC_HDLC
+ if (info->netcount)
+ hdlcdev_tx_done(info);
+ else
+#endif
+ {
+ struct tty_struct *tty = tty_port_tty_get(&info->port);
+ bh_transmit(info, tty);
+ tty_kref_put(tty);
+ }
+}
+
+#if SYNCLINK_GENERIC_HDLC
+
+/**
+ * called by generic HDLC layer when protocol selected (PPP, frame relay, etc.)
+ * set encoding and frame check sequence (FCS) options
+ *
+ * dev pointer to network device structure
+ * encoding serial encoding setting
+ * parity FCS setting
+ *
+ * returns 0 if success, otherwise error code
+ */
+static int hdlcdev_attach(struct net_device *dev, unsigned short encoding,
+ unsigned short parity)
+{
+ MGSLPC_INFO *info = dev_to_port(dev);
+ struct tty_struct *tty;
+ unsigned char new_encoding;
+ unsigned short new_crctype;
+
+ /* return error if TTY interface open */
+ if (info->port.count)
+ return -EBUSY;
+
+ switch (encoding)
+ {
+ case ENCODING_NRZ: new_encoding = HDLC_ENCODING_NRZ; break;
+ case ENCODING_NRZI: new_encoding = HDLC_ENCODING_NRZI_SPACE; break;
+ case ENCODING_FM_MARK: new_encoding = HDLC_ENCODING_BIPHASE_MARK; break;
+ case ENCODING_FM_SPACE: new_encoding = HDLC_ENCODING_BIPHASE_SPACE; break;
+ case ENCODING_MANCHESTER: new_encoding = HDLC_ENCODING_BIPHASE_LEVEL; break;
+ default: return -EINVAL;
+ }
+
+ switch (parity)
+ {
+ case PARITY_NONE: new_crctype = HDLC_CRC_NONE; break;
+ case PARITY_CRC16_PR1_CCITT: new_crctype = HDLC_CRC_16_CCITT; break;
+ case PARITY_CRC32_PR1_CCITT: new_crctype = HDLC_CRC_32_CCITT; break;
+ default: return -EINVAL;
+ }
+
+ info->params.encoding = new_encoding;
+ info->params.crc_type = new_crctype;
+
+ /* if network interface up, reprogram hardware */
+ if (info->netcount) {
+ tty = tty_port_tty_get(&info->port);
+ mgslpc_program_hw(info, tty);
+ tty_kref_put(tty);
+ }
+
+ return 0;
+}
+
+/**
+ * called by generic HDLC layer to send frame
+ *
+ * skb socket buffer containing HDLC frame
+ * dev pointer to network device structure
+ */
+static netdev_tx_t hdlcdev_xmit(struct sk_buff *skb,
+ struct net_device *dev)
+{
+ MGSLPC_INFO *info = dev_to_port(dev);
+ unsigned long flags;
+
+ if (debug_level >= DEBUG_LEVEL_INFO)
+ printk(KERN_INFO "%s:hdlc_xmit(%s)\n", __FILE__, dev->name);
+
+ /* stop sending until this frame completes */
+ netif_stop_queue(dev);
+
+ /* copy data to device buffers */
+ skb_copy_from_linear_data(skb, info->tx_buf, skb->len);
+ info->tx_get = 0;
+ info->tx_put = info->tx_count = skb->len;
+
+ /* update network statistics */
+ dev->stats.tx_packets++;
+ dev->stats.tx_bytes += skb->len;
+
+ /* done with socket buffer, so free it */
+ dev_kfree_skb(skb);
+
+ /* save start time for transmit timeout detection */
+ netif_trans_update(dev);
+
+ /* start hardware transmitter if necessary */
+ spin_lock_irqsave(&info->lock, flags);
+ if (!info->tx_active) {
+ struct tty_struct *tty = tty_port_tty_get(&info->port);
+ tx_start(info, tty);
+ tty_kref_put(tty);
+ }
+ spin_unlock_irqrestore(&info->lock, flags);
+
+ return NETDEV_TX_OK;
+}
+
+/**
+ * called by network layer when interface enabled
+ * claim resources and initialize hardware
+ *
+ * dev pointer to network device structure
+ *
+ * returns 0 if success, otherwise error code
+ */
+static int hdlcdev_open(struct net_device *dev)
+{
+ MGSLPC_INFO *info = dev_to_port(dev);
+ struct tty_struct *tty;
+ int rc;
+ unsigned long flags;
+
+ if (debug_level >= DEBUG_LEVEL_INFO)
+ printk("%s:hdlcdev_open(%s)\n", __FILE__, dev->name);
+
+ /* generic HDLC layer open processing */
+ rc = hdlc_open(dev);
+ if (rc != 0)
+ return rc;
+
+ /* arbitrate between network and tty opens */
+ spin_lock_irqsave(&info->netlock, flags);
+ if (info->port.count != 0 || info->netcount != 0) {
+ printk(KERN_WARNING "%s: hdlc_open returning busy\n", dev->name);
+ spin_unlock_irqrestore(&info->netlock, flags);
+ return -EBUSY;
+ }
+ info->netcount=1;
+ spin_unlock_irqrestore(&info->netlock, flags);
+
+ tty = tty_port_tty_get(&info->port);
+ /* claim resources and init adapter */
+ rc = startup(info, tty);
+ if (rc != 0) {
+ tty_kref_put(tty);
+ spin_lock_irqsave(&info->netlock, flags);
+ info->netcount=0;
+ spin_unlock_irqrestore(&info->netlock, flags);
+ return rc;
+ }
+ /* assert RTS and DTR, apply hardware settings */
+ info->serial_signals |= SerialSignal_RTS | SerialSignal_DTR;
+ mgslpc_program_hw(info, tty);
+ tty_kref_put(tty);
+
+ /* enable network layer transmit */
+ netif_trans_update(dev);
+ netif_start_queue(dev);
+
+ /* inform generic HDLC layer of current DCD status */
+ spin_lock_irqsave(&info->lock, flags);
+ get_signals(info);
+ spin_unlock_irqrestore(&info->lock, flags);
+ if (info->serial_signals & SerialSignal_DCD)
+ netif_carrier_on(dev);
+ else
+ netif_carrier_off(dev);
+ return 0;
+}
+
+/**
+ * called by network layer when interface is disabled
+ * shutdown hardware and release resources
+ *
+ * dev pointer to network device structure
+ *
+ * returns 0 if success, otherwise error code
+ */
+static int hdlcdev_close(struct net_device *dev)
+{
+ MGSLPC_INFO *info = dev_to_port(dev);
+ struct tty_struct *tty = tty_port_tty_get(&info->port);
+ unsigned long flags;
+
+ if (debug_level >= DEBUG_LEVEL_INFO)
+ printk("%s:hdlcdev_close(%s)\n", __FILE__, dev->name);
+
+ netif_stop_queue(dev);
+
+ /* shutdown adapter and release resources */
+ shutdown(info, tty);
+ tty_kref_put(tty);
+ hdlc_close(dev);
+
+ spin_lock_irqsave(&info->netlock, flags);
+ info->netcount=0;
+ spin_unlock_irqrestore(&info->netlock, flags);
+
+ return 0;
+}
+
+/**
+ * called by network layer to process IOCTL call to network device
+ *
+ * dev pointer to network device structure
+ * ifs pointer to network interface settings structure
+ *
+ * returns 0 if success, otherwise error code
+ */
+static int hdlcdev_wan_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;
+ MGSLPC_INFO *info = dev_to_port(dev);
+ unsigned int flags;
+
+ if (debug_level >= DEBUG_LEVEL_INFO)
+ printk("%s:hdlcdev_ioctl(%s)\n", __FILE__, dev->name);
+
+ /* return error if TTY interface open */
+ if (info->port.count)
+ return -EBUSY;
+
+ memset(&new_line, 0, size);
+
+ switch (ifs->type) {
+ case IF_GET_IFACE: /* return current sync_serial_settings */
+
+ ifs->type = IF_IFACE_SYNC_SERIAL;
+ if (ifs->size < size) {
+ ifs->size = size; /* data size wanted */
+ return -ENOBUFS;
+ }
+
+ flags = info->params.flags & (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_RXC_DPLL |
+ HDLC_FLAG_RXC_BRG | HDLC_FLAG_RXC_TXCPIN |
+ HDLC_FLAG_TXC_TXCPIN | HDLC_FLAG_TXC_DPLL |
+ HDLC_FLAG_TXC_BRG | HDLC_FLAG_TXC_RXCPIN);
+
+ switch (flags){
+ case (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_TXCPIN): new_line.clock_type = CLOCK_EXT; break;
+ case (HDLC_FLAG_RXC_BRG | HDLC_FLAG_TXC_BRG): new_line.clock_type = CLOCK_INT; break;
+ case (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_BRG): new_line.clock_type = CLOCK_TXINT; break;
+ case (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_RXCPIN): new_line.clock_type = CLOCK_TXFROMRX; break;
+ default: new_line.clock_type = CLOCK_DEFAULT;
+ }
+
+ new_line.clock_rate = info->params.clock_speed;
+ new_line.loopback = info->params.loopback ? 1:0;
+
+ if (copy_to_user(line, &new_line, size))
+ return -EFAULT;
+ return 0;
+
+ case IF_IFACE_SYNC_SERIAL: /* set sync_serial_settings */
+
+ if(!capable(CAP_NET_ADMIN))
+ return -EPERM;
+ if (copy_from_user(&new_line, line, size))
+ return -EFAULT;
+
+ switch (new_line.clock_type)
+ {
+ case CLOCK_EXT: flags = HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_TXCPIN; break;
+ case CLOCK_TXFROMRX: flags = HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_RXCPIN; break;
+ case CLOCK_INT: flags = HDLC_FLAG_RXC_BRG | HDLC_FLAG_TXC_BRG; break;
+ case CLOCK_TXINT: flags = HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_BRG; break;
+ case CLOCK_DEFAULT: flags = info->params.flags &
+ (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_RXC_DPLL |
+ HDLC_FLAG_RXC_BRG | HDLC_FLAG_RXC_TXCPIN |
+ HDLC_FLAG_TXC_TXCPIN | HDLC_FLAG_TXC_DPLL |
+ HDLC_FLAG_TXC_BRG | HDLC_FLAG_TXC_RXCPIN); break;
+ default: return -EINVAL;
+ }
+
+ if (new_line.loopback != 0 && new_line.loopback != 1)
+ return -EINVAL;
+
+ info->params.flags &= ~(HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_RXC_DPLL |
+ HDLC_FLAG_RXC_BRG | HDLC_FLAG_RXC_TXCPIN |
+ HDLC_FLAG_TXC_TXCPIN | HDLC_FLAG_TXC_DPLL |
+ HDLC_FLAG_TXC_BRG | HDLC_FLAG_TXC_RXCPIN);
+ info->params.flags |= flags;
+
+ info->params.loopback = new_line.loopback;
+
+ if (flags & (HDLC_FLAG_RXC_BRG | HDLC_FLAG_TXC_BRG))
+ info->params.clock_speed = new_line.clock_rate;
+ else
+ info->params.clock_speed = 0;
+
+ /* if network interface up, reprogram hardware */
+ if (info->netcount) {
+ struct tty_struct *tty = tty_port_tty_get(&info->port);
+ mgslpc_program_hw(info, tty);
+ tty_kref_put(tty);
+ }
+ return 0;
+ default:
+ return hdlc_ioctl(dev, ifs);
+ }
+}
+
+/**
+ * called by network layer when transmit timeout is detected
+ *
+ * dev pointer to network device structure
+ */
+static void hdlcdev_tx_timeout(struct net_device *dev, unsigned int txqueue)
+{
+ MGSLPC_INFO *info = dev_to_port(dev);
+ unsigned long flags;
+
+ if (debug_level >= DEBUG_LEVEL_INFO)
+ printk("hdlcdev_tx_timeout(%s)\n", dev->name);
+
+ dev->stats.tx_errors++;
+ dev->stats.tx_aborted_errors++;
+
+ spin_lock_irqsave(&info->lock, flags);
+ tx_stop(info);
+ spin_unlock_irqrestore(&info->lock, flags);
+
+ netif_wake_queue(dev);
+}
+
+/**
+ * called by device driver when transmit completes
+ * reenable network layer transmit if stopped
+ *
+ * info pointer to device instance information
+ */
+static void hdlcdev_tx_done(MGSLPC_INFO *info)
+{
+ if (netif_queue_stopped(info->netdev))
+ netif_wake_queue(info->netdev);
+}
+
+/**
+ * called by device driver when frame received
+ * pass frame to network layer
+ *
+ * info pointer to device instance information
+ * buf pointer to buffer contianing frame data
+ * size count of data bytes in buf
+ */
+static void hdlcdev_rx(MGSLPC_INFO *info, char *buf, int size)
+{
+ struct sk_buff *skb = dev_alloc_skb(size);
+ struct net_device *dev = info->netdev;
+
+ if (debug_level >= DEBUG_LEVEL_INFO)
+ printk("hdlcdev_rx(%s)\n", dev->name);
+
+ if (skb == NULL) {
+ printk(KERN_NOTICE "%s: can't alloc skb, dropping packet\n", dev->name);
+ dev->stats.rx_dropped++;
+ return;
+ }
+
+ skb_put_data(skb, buf, size);
+
+ skb->protocol = hdlc_type_trans(skb, dev);
+
+ dev->stats.rx_packets++;
+ dev->stats.rx_bytes += size;
+
+ netif_rx(skb);
+}
+
+static const struct net_device_ops hdlcdev_ops = {
+ .ndo_open = hdlcdev_open,
+ .ndo_stop = hdlcdev_close,
+ .ndo_start_xmit = hdlc_start_xmit,
+ .ndo_siocwandev = hdlcdev_wan_ioctl,
+ .ndo_tx_timeout = hdlcdev_tx_timeout,
+};
+
+/**
+ * called by device driver when adding device instance
+ * do generic HDLC initialization
+ *
+ * info pointer to device instance information
+ *
+ * returns 0 if success, otherwise error code
+ */
+static int hdlcdev_init(MGSLPC_INFO *info)
+{
+ int rc;
+ struct net_device *dev;
+ hdlc_device *hdlc;
+
+ /* allocate and initialize network and HDLC layer objects */
+
+ dev = alloc_hdlcdev(info);
+ if (dev == NULL) {
+ printk(KERN_ERR "%s:hdlc device allocation failure\n", __FILE__);
+ return -ENOMEM;
+ }
+
+ /* for network layer reporting purposes only */
+ dev->base_addr = info->io_base;
+ dev->irq = info->irq_level;
+
+ /* network layer callbacks and settings */
+ dev->netdev_ops = &hdlcdev_ops;
+ dev->watchdog_timeo = 10 * HZ;
+ dev->tx_queue_len = 50;
+
+ /* generic HDLC layer callbacks and settings */
+ hdlc = dev_to_hdlc(dev);
+ hdlc->attach = hdlcdev_attach;
+ hdlc->xmit = hdlcdev_xmit;
+
+ /* register objects with HDLC layer */
+ rc = register_hdlc_device(dev);
+ if (rc) {
+ printk(KERN_WARNING "%s:unable to register hdlc device\n", __FILE__);
+ free_netdev(dev);
+ return rc;
+ }
+
+ info->netdev = dev;
+ return 0;
+}
+
+/**
+ * called by device driver when removing device instance
+ * do generic HDLC cleanup
+ *
+ * info pointer to device instance information
+ */
+static void hdlcdev_exit(MGSLPC_INFO *info)
+{
+ unregister_hdlc_device(info->netdev);
+ free_netdev(info->netdev);
+ info->netdev = NULL;
+}
+
+#endif /* CONFIG_HDLC */
+
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-06 16:59:17 +0000