+++ /dev/null
- /*
- * 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");
+++ /dev/null
-/*
- * 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 bool carrier_raised(struct tty_port *port);
-static void dtr_rts(struct tty_port *port, bool active);
-
-#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, true);
-
- 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, false);
-}
-
-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 bool 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);
-
- return info->serial_signals & SerialSignal_DCD;
-}
-
-static void dtr_rts(struct tty_port *port, bool active)
-{
- MGSLPC_INFO *info = container_of(port, MGSLPC_INFO, port);
- unsigned long flags;
-
- spin_lock_irqsave(&info->lock, flags);
- if (active)
- 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 */
-
projects / platform / kernel / linux-starfive.git / commitdiff