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linux/drivers/isdn/icn/icn.c
Dave Jones 138b9dd1fd [PATCH] icn driver fails to unload when no hardware present 
Fix a null dereference in module unload path.

Found by a simple modprobe icn ; rmmod icn

Signed-off-by: Dave Jones <davej@redhat.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-08-08 16:21:32 -07:00

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/* $Id: icn.c,v 1.65.6.8 2001/09/23 22:24:55 kai Exp $
*
* ISDN low-level module for the ICN active ISDN-Card.
*
* Copyright 1994,95,96 by Fritz Elfert (fritz@isdn4linux.de)
*
* This software may be used and distributed according to the terms
* of the GNU General Public License, incorporated herein by reference.
*
*/
#include "icn.h"
#include <linux/module.h>
#include <linux/init.h>
static int portbase = ICN_BASEADDR;
static unsigned long membase = ICN_MEMADDR;
static char *icn_id = "\0";
static char *icn_id2 = "\0";
MODULE_DESCRIPTION("ISDN4Linux: Driver for ICN active ISDN card");
MODULE_AUTHOR("Fritz Elfert");
MODULE_LICENSE("GPL");
module_param(portbase, int, 0);
MODULE_PARM_DESC(portbase, "Port address of first card");
module_param(membase, ulong, 0);
MODULE_PARM_DESC(membase, "Shared memory address of all cards");
module_param(icn_id, charp, 0);
MODULE_PARM_DESC(icn_id, "ID-String of first card");
module_param(icn_id2, charp, 0);
MODULE_PARM_DESC(icn_id2, "ID-String of first card, second S0 (4B only)");
/*
* Verbose bootcode- and protocol-downloading.
*/
#undef BOOT_DEBUG
/*
* Verbose Shmem-Mapping.
*/
#undef MAP_DEBUG
static char
*revision = "$Revision: 1.65.6.8 $";
static int icn_addcard(int, char *, char *);
/*
* Free send-queue completely.
* Parameter:
* card = pointer to card struct
* channel = channel number
*/
static void
icn_free_queue(icn_card * card, int channel)
{
struct sk_buff_head *queue = &card->spqueue[channel];
struct sk_buff *skb;
skb_queue_purge(queue);
card->xlen[channel] = 0;
card->sndcount[channel] = 0;
if ((skb = card->xskb[channel])) {
card->xskb[channel] = NULL;
dev_kfree_skb(skb);
}
}
/* Put a value into a shift-register, highest bit first.
* Parameters:
* port = port for output (bit 0 is significant)
* val = value to be output
* firstbit = Bit-Number of highest bit
* bitcount = Number of bits to output
*/
static inline void
icn_shiftout(unsigned short port,
unsigned long val,
int firstbit,
int bitcount)
{
register u_char s;
register u_char c;
for (s = firstbit, c = bitcount; c > 0; s--, c--)
OUTB_P((u_char) ((val >> s) & 1) ? 0xff : 0, port);
}
/*
* disable a cards shared memory
*/
static inline void
icn_disable_ram(icn_card * card)
{
OUTB_P(0, ICN_MAPRAM);
}
/*
* enable a cards shared memory
*/
static inline void
icn_enable_ram(icn_card * card)
{
OUTB_P(0xff, ICN_MAPRAM);
}
/*
* Map a cards channel0 (Bank0/Bank8) or channel1 (Bank4/Bank12)
*
* must called with holding the devlock
*/
static inline void
icn_map_channel(icn_card * card, int channel)
{
#ifdef MAP_DEBUG
printk(KERN_DEBUG "icn_map_channel %d %d\n", dev.channel, channel);
#endif
if ((channel == dev.channel) && (card == dev.mcard))
return;
if (dev.mcard)
icn_disable_ram(dev.mcard);
icn_shiftout(ICN_BANK, chan2bank[channel], 3, 4); /* Select Bank */
icn_enable_ram(card);
dev.mcard = card;
dev.channel = channel;
#ifdef MAP_DEBUG
printk(KERN_DEBUG "icn_map_channel done\n");
#endif
}
/*
* Lock a cards channel.
* Return 0 if requested card/channel is unmapped (failure).
* Return 1 on success.
*
* must called with holding the devlock
*/
static inline int
icn_lock_channel(icn_card * card, int channel)
{
register int retval;
#ifdef MAP_DEBUG
printk(KERN_DEBUG "icn_lock_channel %d\n", channel);
#endif
if ((dev.channel == channel) && (card == dev.mcard)) {
dev.chanlock++;
retval = 1;
#ifdef MAP_DEBUG
printk(KERN_DEBUG "icn_lock_channel %d OK\n", channel);
#endif
} else {
retval = 0;
#ifdef MAP_DEBUG
printk(KERN_DEBUG "icn_lock_channel %d FAILED, dc=%d\n", channel, dev.channel);
#endif
}
return retval;
}
/*
* Release current card/channel lock
*
* must called with holding the devlock
*/
static inline void
__icn_release_channel(void)
{
#ifdef MAP_DEBUG
printk(KERN_DEBUG "icn_release_channel l=%d\n", dev.chanlock);
#endif
if (dev.chanlock > 0)
dev.chanlock--;
}
/*
* Release current card/channel lock
*/
static inline void
icn_release_channel(void)
{
ulong flags;
spin_lock_irqsave(&dev.devlock, flags);
__icn_release_channel();
spin_unlock_irqrestore(&dev.devlock, flags);
}
/*
* Try to map and lock a cards channel.
* Return 1 on success, 0 on failure.
*/
static inline int
icn_trymaplock_channel(icn_card * card, int channel)
{
ulong flags;
#ifdef MAP_DEBUG
printk(KERN_DEBUG "trymaplock c=%d dc=%d l=%d\n", channel, dev.channel,
dev.chanlock);
#endif
spin_lock_irqsave(&dev.devlock, flags);
if ((!dev.chanlock) ||
((dev.channel == channel) && (dev.mcard == card))) {
dev.chanlock++;
icn_map_channel(card, channel);
spin_unlock_irqrestore(&dev.devlock, flags);
#ifdef MAP_DEBUG
printk(KERN_DEBUG "trymaplock %d OK\n", channel);
#endif
return 1;
}
spin_unlock_irqrestore(&dev.devlock, flags);
#ifdef MAP_DEBUG
printk(KERN_DEBUG "trymaplock %d FAILED\n", channel);
#endif
return 0;
}
/*
* Release current card/channel lock,
* then map same or other channel without locking.
*/
static inline void
icn_maprelease_channel(icn_card * card, int channel)
{
ulong flags;
#ifdef MAP_DEBUG
printk(KERN_DEBUG "map_release c=%d l=%d\n", channel, dev.chanlock);
#endif
spin_lock_irqsave(&dev.devlock, flags);
if (dev.chanlock > 0)
dev.chanlock--;
if (!dev.chanlock)
icn_map_channel(card, channel);
spin_unlock_irqrestore(&dev.devlock, flags);
}
/* Get Data from the B-Channel, assemble fragmented packets and put them
* into receive-queue. Wake up any B-Channel-reading processes.
* This routine is called via timer-callback from icn_pollbchan().
*/
static void
icn_pollbchan_receive(int channel, icn_card * card)
{
int mch = channel + ((card->secondhalf) ? 2 : 0);
int eflag;
int cnt;
struct sk_buff *skb;
if (icn_trymaplock_channel(card, mch)) {
while (rbavl) {
cnt = readb(&rbuf_l);
if ((card->rcvidx[channel] + cnt) > 4000) {
printk(KERN_WARNING
"icn: (%s) bogus packet on ch%d, dropping.\n",
CID,
channel + 1);
card->rcvidx[channel] = 0;
eflag = 0;
} else {
memcpy_fromio(&card->rcvbuf[channel][card->rcvidx[channel]],
&rbuf_d, cnt);
card->rcvidx[channel] += cnt;
eflag = readb(&rbuf_f);
}
rbnext;
icn_maprelease_channel(card, mch & 2);
if (!eflag) {
if ((cnt = card->rcvidx[channel])) {
if (!(skb = dev_alloc_skb(cnt))) {
printk(KERN_WARNING "icn: receive out of memory\n");
break;
}
memcpy(skb_put(skb, cnt), card->rcvbuf[channel], cnt);
card->rcvidx[channel] = 0;
card->interface.rcvcallb_skb(card->myid, channel, skb);
}
}
if (!icn_trymaplock_channel(card, mch))
break;
}
icn_maprelease_channel(card, mch & 2);
}
}
/* Send data-packet to B-Channel, split it up into fragments of
* ICN_FRAGSIZE length. If last fragment is sent out, signal
* success to upper layers via statcallb with ISDN_STAT_BSENT argument.
* This routine is called via timer-callback from icn_pollbchan() or
* directly from icn_sendbuf().
*/
static void
icn_pollbchan_send(int channel, icn_card * card)
{
int mch = channel + ((card->secondhalf) ? 2 : 0);
int cnt;
unsigned long flags;
struct sk_buff *skb;
isdn_ctrl cmd;
if (!(card->sndcount[channel] || card->xskb[channel] ||
!skb_queue_empty(&card->spqueue[channel])))
return;
if (icn_trymaplock_channel(card, mch)) {
while (sbfree &&
(card->sndcount[channel] ||
!skb_queue_empty(&card->spqueue[channel]) ||
card->xskb[channel])) {
spin_lock_irqsave(&card->lock, flags);
if (card->xmit_lock[channel]) {
spin_unlock_irqrestore(&card->lock, flags);
break;
}
card->xmit_lock[channel]++;
spin_unlock_irqrestore(&card->lock, flags);
skb = card->xskb[channel];
if (!skb) {
skb = skb_dequeue(&card->spqueue[channel]);
if (skb) {
/* Pop ACK-flag off skb.
* Store length to xlen.
*/
if (*(skb_pull(skb,1)))
card->xlen[channel] = skb->len;
else
card->xlen[channel] = 0;
}
}
if (!skb)
break;
if (skb->len > ICN_FRAGSIZE) {
writeb(0xff, &sbuf_f);
cnt = ICN_FRAGSIZE;
} else {
writeb(0x0, &sbuf_f);
cnt = skb->len;
}
writeb(cnt, &sbuf_l);
memcpy_toio(&sbuf_d, skb->data, cnt);
skb_pull(skb, cnt);
sbnext; /* switch to next buffer */
icn_maprelease_channel(card, mch & 2);
spin_lock_irqsave(&card->lock, flags);
card->sndcount[channel] -= cnt;
if (!skb->len) {
if (card->xskb[channel])
card->xskb[channel] = NULL;
card->xmit_lock[channel] = 0;
spin_unlock_irqrestore(&card->lock, flags);
dev_kfree_skb(skb);
if (card->xlen[channel]) {
cmd.command = ISDN_STAT_BSENT;
cmd.driver = card->myid;
cmd.arg = channel;
cmd.parm.length = card->xlen[channel];
card->interface.statcallb(&cmd);
}
} else {
card->xskb[channel] = skb;
card->xmit_lock[channel] = 0;
spin_unlock_irqrestore(&card->lock, flags);
}
if (!icn_trymaplock_channel(card, mch))
break;
}
icn_maprelease_channel(card, mch & 2);
}
}
/* Send/Receive Data to/from the B-Channel.
* This routine is called via timer-callback.
* It schedules itself while any B-Channel is open.
*/
static void
icn_pollbchan(unsigned long data)
{
icn_card *card = (icn_card *) data;
unsigned long flags;
if (card->flags & ICN_FLAGS_B1ACTIVE) {
icn_pollbchan_receive(0, card);
icn_pollbchan_send(0, card);
}
if (card->flags & ICN_FLAGS_B2ACTIVE) {
icn_pollbchan_receive(1, card);
icn_pollbchan_send(1, card);
}
if (card->flags & (ICN_FLAGS_B1ACTIVE | ICN_FLAGS_B2ACTIVE)) {
/* schedule b-channel polling again */
spin_lock_irqsave(&card->lock, flags);
mod_timer(&card->rb_timer, jiffies+ICN_TIMER_BCREAD);
card->flags |= ICN_FLAGS_RBTIMER;
spin_unlock_irqrestore(&card->lock, flags);
} else
card->flags &= ~ICN_FLAGS_RBTIMER;
}
typedef struct icn_stat {
char *statstr;
int command;
int action;
} icn_stat;
/* *INDENT-OFF* */
static icn_stat icn_stat_table[] =
{
{"BCON_", ISDN_STAT_BCONN, 1}, /* B-Channel connected */
{"BDIS_", ISDN_STAT_BHUP, 2}, /* B-Channel disconnected */
/*
** add d-channel connect and disconnect support to link-level
*/
{"DCON_", ISDN_STAT_DCONN, 10}, /* D-Channel connected */
{"DDIS_", ISDN_STAT_DHUP, 11}, /* D-Channel disconnected */
{"DCAL_I", ISDN_STAT_ICALL, 3}, /* Incoming call dialup-line */
{"DSCA_I", ISDN_STAT_ICALL, 3}, /* Incoming call 1TR6-SPV */
{"FCALL", ISDN_STAT_ICALL, 4}, /* Leased line connection up */
{"CIF", ISDN_STAT_CINF, 5}, /* Charge-info, 1TR6-type */
{"AOC", ISDN_STAT_CINF, 6}, /* Charge-info, DSS1-type */
{"CAU", ISDN_STAT_CAUSE, 7}, /* Cause code */
{"TEI OK", ISDN_STAT_RUN, 0}, /* Card connected to wallplug */
{"E_L1: ACT FAIL", ISDN_STAT_BHUP, 8}, /* Layer-1 activation failed */
{"E_L2: DATA LIN", ISDN_STAT_BHUP, 8}, /* Layer-2 data link lost */
{"E_L1: ACTIVATION FAILED",
ISDN_STAT_BHUP, 8}, /* Layer-1 activation failed */
{NULL, 0, -1}
};
/* *INDENT-ON* */
/*
* Check Statusqueue-Pointer from isdn-cards.
* If there are new status-replies from the interface, check
* them against B-Channel-connects/disconnects and set flags accordingly.
* Wake-Up any processes, who are reading the status-device.
* If there are B-Channels open, initiate a timer-callback to
* icn_pollbchan().
* This routine is called periodically via timer.
*/
static void
icn_parse_status(u_char * status, int channel, icn_card * card)
{
icn_stat *s = icn_stat_table;
int action = -1;
unsigned long flags;
isdn_ctrl cmd;
while (s->statstr) {
if (!strncmp(status, s->statstr, strlen(s->statstr))) {
cmd.command = s->command;
action = s->action;
break;
}
s++;
}
if (action == -1)
return;
cmd.driver = card->myid;
cmd.arg = channel;
switch (action) {
case 11:
spin_lock_irqsave(&card->lock, flags);
icn_free_queue(card,channel);
card->rcvidx[channel] = 0;
if (card->flags &
((channel)?ICN_FLAGS_B2ACTIVE:ICN_FLAGS_B1ACTIVE)) {
isdn_ctrl ncmd;
card->flags &= ~((channel)?
ICN_FLAGS_B2ACTIVE:ICN_FLAGS_B1ACTIVE);
memset(&ncmd, 0, sizeof(ncmd));
ncmd.driver = card->myid;
ncmd.arg = channel;
ncmd.command = ISDN_STAT_BHUP;
spin_unlock_irqrestore(&card->lock, flags);
card->interface.statcallb(&cmd);
} else
spin_unlock_irqrestore(&card->lock, flags);
break;
case 1:
spin_lock_irqsave(&card->lock, flags);
icn_free_queue(card,channel);
card->flags |= (channel) ?
ICN_FLAGS_B2ACTIVE : ICN_FLAGS_B1ACTIVE;
spin_unlock_irqrestore(&card->lock, flags);
break;
case 2:
spin_lock_irqsave(&card->lock, flags);
card->flags &= ~((channel) ?
ICN_FLAGS_B2ACTIVE : ICN_FLAGS_B1ACTIVE);
icn_free_queue(card, channel);
card->rcvidx[channel] = 0;
spin_unlock_irqrestore(&card->lock, flags);
break;
case 3:
{
char *t = status + 6;
char *s = strchr(t, ',');
*s++ = '\0';
strlcpy(cmd.parm.setup.phone, t,
sizeof(cmd.parm.setup.phone));
s = strchr(t = s, ',');
*s++ = '\0';
if (!strlen(t))
cmd.parm.setup.si1 = 0;
else
cmd.parm.setup.si1 =
simple_strtoul(t, NULL, 10);
s = strchr(t = s, ',');
*s++ = '\0';
if (!strlen(t))
cmd.parm.setup.si2 = 0;
else
cmd.parm.setup.si2 =
simple_strtoul(t, NULL, 10);
strlcpy(cmd.parm.setup.eazmsn, s,
sizeof(cmd.parm.setup.eazmsn));
}
cmd.parm.setup.plan = 0;
cmd.parm.setup.screen = 0;
break;
case 4:
sprintf(cmd.parm.setup.phone, "LEASED%d", card->myid);
sprintf(cmd.parm.setup.eazmsn, "%d", channel + 1);
cmd.parm.setup.si1 = 7;
cmd.parm.setup.si2 = 0;
cmd.parm.setup.plan = 0;
cmd.parm.setup.screen = 0;
break;
case 5:
strlcpy(cmd.parm.num, status + 3, sizeof(cmd.parm.num));
break;
case 6:
snprintf(cmd.parm.num, sizeof(cmd.parm.num), "%d",
(int) simple_strtoul(status + 7, NULL, 16));
break;
case 7:
status += 3;
if (strlen(status) == 4)
snprintf(cmd.parm.num, sizeof(cmd.parm.num), "%s%c%c",
status + 2, *status, *(status + 1));
else
strlcpy(cmd.parm.num, status + 1, sizeof(cmd.parm.num));
break;
case 8:
spin_lock_irqsave(&card->lock, flags);
card->flags &= ~ICN_FLAGS_B1ACTIVE;
icn_free_queue(card, 0);
card->rcvidx[0] = 0;
spin_unlock_irqrestore(&card->lock, flags);
cmd.arg = 0;
cmd.driver = card->myid;
card->interface.statcallb(&cmd);
cmd.command = ISDN_STAT_DHUP;
cmd.arg = 0;
cmd.driver = card->myid;
card->interface.statcallb(&cmd);
cmd.command = ISDN_STAT_BHUP;
spin_lock_irqsave(&card->lock, flags);
card->flags &= ~ICN_FLAGS_B2ACTIVE;
icn_free_queue(card, 1);
card->rcvidx[1] = 0;
spin_unlock_irqrestore(&card->lock, flags);
cmd.arg = 1;
cmd.driver = card->myid;
card->interface.statcallb(&cmd);
cmd.command = ISDN_STAT_DHUP;
cmd.arg = 1;
cmd.driver = card->myid;
break;
}
card->interface.statcallb(&cmd);
return;
}
static void
icn_putmsg(icn_card * card, unsigned char c)
{
ulong flags;
spin_lock_irqsave(&card->lock, flags);
*card->msg_buf_write++ = (c == 0xff) ? '\n' : c;
if (card->msg_buf_write == card->msg_buf_read) {
if (++card->msg_buf_read > card->msg_buf_end)
card->msg_buf_read = card->msg_buf;
}
if (card->msg_buf_write > card->msg_buf_end)
card->msg_buf_write = card->msg_buf;
spin_unlock_irqrestore(&card->lock, flags);
}
static void
icn_polldchan(unsigned long data)
{
icn_card *card = (icn_card *) data;
int mch = card->secondhalf ? 2 : 0;
int avail = 0;
int left;
u_char c;
int ch;
unsigned long flags;
int i;
u_char *p;
isdn_ctrl cmd;
if (icn_trymaplock_channel(card, mch)) {
avail = msg_avail;
for (left = avail, i = readb(&msg_o); left > 0; i++, left--) {
c = readb(&dev.shmem->comm_buffers.iopc_buf[i & 0xff]);
icn_putmsg(card, c);
if (c == 0xff) {
card->imsg[card->iptr] = 0;
card->iptr = 0;
if (card->imsg[0] == '0' && card->imsg[1] >= '0' &&
card->imsg[1] <= '2' && card->imsg[2] == ';') {
ch = (card->imsg[1] - '0') - 1;
p = &card->imsg[3];
icn_parse_status(p, ch, card);
} else {
p = card->imsg;
if (!strncmp(p, "DRV1.", 5)) {
u_char vstr[10];
u_char *q = vstr;
printk(KERN_INFO "icn: (%s) %s\n", CID, p);
if (!strncmp(p + 7, "TC", 2)) {
card->ptype = ISDN_PTYPE_1TR6;
card->interface.features |= ISDN_FEATURE_P_1TR6;
printk(KERN_INFO
"icn: (%s) 1TR6-Protocol loaded and running\n", CID);
}
if (!strncmp(p + 7, "EC", 2)) {
card->ptype = ISDN_PTYPE_EURO;
card->interface.features |= ISDN_FEATURE_P_EURO;
printk(KERN_INFO
"icn: (%s) Euro-Protocol loaded and running\n", CID);
}
p = strstr(card->imsg, "BRV") + 3;
while (*p) {
if (*p >= '0' && *p <= '9')
*q++ = *p;
p++;
}
*q = '\0';
strcat(vstr, "000");
vstr[3] = '\0';
card->fw_rev = (int) simple_strtoul(vstr, NULL, 10);
continue;
}
}
} else {
card->imsg[card->iptr] = c;
if (card->iptr < 59)
card->iptr++;
}
}
writeb((readb(&msg_o) + avail) & 0xff, &msg_o);
icn_release_channel();
}
if (avail) {
cmd.command = ISDN_STAT_STAVAIL;
cmd.driver = card->myid;
cmd.arg = avail;
card->interface.statcallb(&cmd);
}
spin_lock_irqsave(&card->lock, flags);
if (card->flags & (ICN_FLAGS_B1ACTIVE | ICN_FLAGS_B2ACTIVE))
if (!(card->flags & ICN_FLAGS_RBTIMER)) {
/* schedule b-channel polling */
card->flags |= ICN_FLAGS_RBTIMER;
del_timer(&card->rb_timer);
card->rb_timer.function = icn_pollbchan;
card->rb_timer.data = (unsigned long) card;
card->rb_timer.expires = jiffies + ICN_TIMER_BCREAD;
add_timer(&card->rb_timer);
}
/* schedule again */
mod_timer(&card->st_timer, jiffies+ICN_TIMER_DCREAD);
spin_unlock_irqrestore(&card->lock, flags);
}
/* Append a packet to the transmit buffer-queue.
* Parameters:
* channel = Number of B-channel
* skb = pointer to sk_buff
* card = pointer to card-struct
* Return:
* Number of bytes transferred, -E??? on error
*/
static int
icn_sendbuf(int channel, int ack, struct sk_buff *skb, icn_card * card)
{
int len = skb->len;
unsigned long flags;
struct sk_buff *nskb;
if (len > 4000) {
printk(KERN_WARNING
"icn: Send packet too large\n");
return -EINVAL;
}
if (len) {
if (!(card->flags & (channel) ? ICN_FLAGS_B2ACTIVE : ICN_FLAGS_B1ACTIVE))
return 0;
if (card->sndcount[channel] > ICN_MAX_SQUEUE)
return 0;
#warning TODO test headroom or use skb->nb to flag ACK
nskb = skb_clone(skb, GFP_ATOMIC);
if (nskb) {
/* Push ACK flag as one
* byte in front of data.
*/
*(skb_push(nskb, 1)) = ack?1:0;
skb_queue_tail(&card->spqueue[channel], nskb);
dev_kfree_skb(skb);
} else
len = 0;
spin_lock_irqsave(&card->lock, flags);
card->sndcount[channel] += len;
spin_unlock_irqrestore(&card->lock, flags);
}
return len;
}
/*
* Check card's status after starting the bootstrap loader.
* On entry, the card's shared memory has already to be mapped.
* Return:
* 0 on success (Boot loader ready)
* -EIO on failure (timeout)
*/
static int
icn_check_loader(int cardnumber)
{
int timer = 0;
while (1) {
#ifdef BOOT_DEBUG
printk(KERN_DEBUG "Loader %d ?\n", cardnumber);
#endif
if (readb(&dev.shmem->data_control.scns) ||
readb(&dev.shmem->data_control.scnr)) {
if (timer++ > 5) {
printk(KERN_WARNING
"icn: Boot-Loader %d timed out.\n",
cardnumber);
icn_release_channel();
return -EIO;
}
#ifdef BOOT_DEBUG
printk(KERN_DEBUG "Loader %d TO?\n", cardnumber);
#endif
msleep_interruptible(ICN_BOOT_TIMEOUT1);
} else {
#ifdef BOOT_DEBUG
printk(KERN_DEBUG "Loader %d OK\n", cardnumber);
#endif
icn_release_channel();
return 0;
}
}
}
/* Load the boot-code into the interface-card's memory and start it.
* Always called from user-process.
*
* Parameters:
* buffer = pointer to packet
* Return:
* 0 if successfully loaded
*/
#ifdef BOOT_DEBUG
#define SLEEP(sec) { \
int slsec = sec; \
printk(KERN_DEBUG "SLEEP(%d)\n",slsec); \
while (slsec) { \
msleep_interruptible(1000); \
slsec--; \
} \
}
#else
#define SLEEP(sec)
#endif
static int
icn_loadboot(u_char __user * buffer, icn_card * card)
{
int ret;
u_char *codebuf;
unsigned long flags;
#ifdef BOOT_DEBUG
printk(KERN_DEBUG "icn_loadboot called, buffaddr=%08lx\n", (ulong) buffer);
#endif
if (!(codebuf = kmalloc(ICN_CODE_STAGE1, GFP_KERNEL))) {
printk(KERN_WARNING "icn: Could not allocate code buffer\n");
ret = -ENOMEM;
goto out;
}
if (copy_from_user(codebuf, buffer, ICN_CODE_STAGE1)) {
ret = -EFAULT;
goto out_kfree;
}
if (!card->rvalid) {
if (!request_region(card->port, ICN_PORTLEN, card->regname)) {
printk(KERN_WARNING
"icn: (%s) ports 0x%03x-0x%03x in use.\n",
CID,
card->port,
card->port + ICN_PORTLEN);
ret = -EBUSY;
goto out_kfree;
}
card->rvalid = 1;
if (card->doubleS0)
card->other->rvalid = 1;
}
if (!dev.mvalid) {
if (!request_mem_region(dev.memaddr, 0x4000, "icn-isdn (all cards)")) {
printk(KERN_WARNING
"icn: memory at 0x%08lx in use.\n", dev.memaddr);
ret = -EBUSY;
goto out_kfree;
}
dev.shmem = ioremap(dev.memaddr, 0x4000);
dev.mvalid = 1;
}
OUTB_P(0, ICN_RUN); /* Reset Controller */
OUTB_P(0, ICN_MAPRAM); /* Disable RAM */
icn_shiftout(ICN_CFG, 0x0f, 3, 4); /* Windowsize= 16k */
icn_shiftout(ICN_CFG, dev.memaddr, 23, 10); /* Set RAM-Addr. */
#ifdef BOOT_DEBUG
printk(KERN_DEBUG "shmem=%08lx\n", dev.memaddr);
#endif
SLEEP(1);
#ifdef BOOT_DEBUG
printk(KERN_DEBUG "Map Bank 0\n");
#endif
spin_lock_irqsave(&dev.devlock, flags);
icn_map_channel(card, 0); /* Select Bank 0 */
icn_lock_channel(card, 0); /* Lock Bank 0 */
spin_unlock_irqrestore(&dev.devlock, flags);
SLEEP(1);
memcpy_toio(dev.shmem, codebuf, ICN_CODE_STAGE1); /* Copy code */
#ifdef BOOT_DEBUG
printk(KERN_DEBUG "Bootloader transferred\n");
#endif
if (card->doubleS0) {
SLEEP(1);
#ifdef BOOT_DEBUG
printk(KERN_DEBUG "Map Bank 8\n");
#endif
spin_lock_irqsave(&dev.devlock, flags);
__icn_release_channel();
icn_map_channel(card, 2); /* Select Bank 8 */
icn_lock_channel(card, 2); /* Lock Bank 8 */
spin_unlock_irqrestore(&dev.devlock, flags);
SLEEP(1);
memcpy_toio(dev.shmem, codebuf, ICN_CODE_STAGE1); /* Copy code */
#ifdef BOOT_DEBUG
printk(KERN_DEBUG "Bootloader transferred\n");
#endif
}
SLEEP(1);
OUTB_P(0xff, ICN_RUN); /* Start Boot-Code */
if ((ret = icn_check_loader(card->doubleS0 ? 2 : 1))) {
goto out_kfree;
}
if (!card->doubleS0) {
ret = 0;
goto out_kfree;
}
/* reached only, if we have a Double-S0-Card */
#ifdef BOOT_DEBUG
printk(KERN_DEBUG "Map Bank 0\n");
#endif
spin_lock_irqsave(&dev.devlock, flags);
icn_map_channel(card, 0); /* Select Bank 0 */
icn_lock_channel(card, 0); /* Lock Bank 0 */
spin_unlock_irqrestore(&dev.devlock, flags);
SLEEP(1);
ret = (icn_check_loader(1));
out_kfree:
kfree(codebuf);
out:
return ret;
}
static int
icn_loadproto(u_char __user * buffer, icn_card * card)
{
register u_char __user *p = buffer;
u_char codebuf[256];
uint left = ICN_CODE_STAGE2;
uint cnt;
int timer;
unsigned long flags;
#ifdef BOOT_DEBUG
printk(KERN_DEBUG "icn_loadproto called\n");
#endif
if (!access_ok(VERIFY_READ, buffer, ICN_CODE_STAGE2))
return -EFAULT;
timer = 0;
spin_lock_irqsave(&dev.devlock, flags);
if (card->secondhalf) {
icn_map_channel(card, 2);
icn_lock_channel(card, 2);
} else {
icn_map_channel(card, 0);
icn_lock_channel(card, 0);
}
spin_unlock_irqrestore(&dev.devlock, flags);
while (left) {
if (sbfree) { /* If there is a free buffer... */
cnt = left;
if (cnt > 256)
cnt = 256;
if (copy_from_user(codebuf, p, cnt)) {
icn_maprelease_channel(card, 0);
return -EFAULT;
}
memcpy_toio(&sbuf_l, codebuf, cnt); /* copy data */
sbnext; /* switch to next buffer */
p += cnt;
left -= cnt;
timer = 0;
} else {
#ifdef BOOT_DEBUG
printk(KERN_DEBUG "boot 2 !sbfree\n");
#endif
if (timer++ > 5) {
icn_maprelease_channel(card, 0);
return -EIO;
}
set_current_state(TASK_INTERRUPTIBLE);
schedule_timeout(10);
}
}
writeb(0x20, &sbuf_n);
timer = 0;
while (1) {
if (readb(&cmd_o) || readb(&cmd_i)) {
#ifdef BOOT_DEBUG
printk(KERN_DEBUG "Proto?\n");
#endif
if (timer++ > 5) {
printk(KERN_WARNING
"icn: (%s) Protocol timed out.\n",
CID);
#ifdef BOOT_DEBUG
printk(KERN_DEBUG "Proto TO!\n");
#endif
icn_maprelease_channel(card, 0);
return -EIO;
}
#ifdef BOOT_DEBUG
printk(KERN_DEBUG "Proto TO?\n");
#endif
msleep_interruptible(ICN_BOOT_TIMEOUT1);
} else {
if ((card->secondhalf) || (!card->doubleS0)) {
#ifdef BOOT_DEBUG
printk(KERN_DEBUG "Proto loaded, install poll-timer %d\n",
card->secondhalf);
#endif
spin_lock_irqsave(&card->lock, flags);
init_timer(&card->st_timer);
card->st_timer.expires = jiffies + ICN_TIMER_DCREAD;
card->st_timer.function = icn_polldchan;
card->st_timer.data = (unsigned long) card;
add_timer(&card->st_timer);
card->flags |= ICN_FLAGS_RUNNING;
if (card->doubleS0) {
init_timer(&card->other->st_timer);
card->other->st_timer.expires = jiffies + ICN_TIMER_DCREAD;
card->other->st_timer.function = icn_polldchan;
card->other->st_timer.data = (unsigned long) card->other;
add_timer(&card->other->st_timer);
card->other->flags |= ICN_FLAGS_RUNNING;
}
spin_unlock_irqrestore(&card->lock, flags);
}
icn_maprelease_channel(card, 0);
return 0;
}
}
}
/* Read the Status-replies from the Interface */
static int
icn_readstatus(u_char __user *buf, int len, icn_card * card)
{
int count;
u_char __user *p;
for (p = buf, count = 0; count < len; p++, count++) {
if (card->msg_buf_read == card->msg_buf_write)
return count;
put_user(*card->msg_buf_read++, p);
if (card->msg_buf_read > card->msg_buf_end)
card->msg_buf_read = card->msg_buf;
}
return count;
}
/* Put command-strings into the command-queue of the Interface */
static int
icn_writecmd(const u_char * buf, int len, int user, icn_card * card)
{
int mch = card->secondhalf ? 2 : 0;
int pp;
int i;
int count;
int xcount;
int ocount;
int loop;
unsigned long flags;
int lastmap_channel;
struct icn_card *lastmap_card;
u_char *p;
isdn_ctrl cmd;
u_char msg[0x100];
ocount = 1;
xcount = loop = 0;
while (len) {
count = cmd_free;
if (count > len)
count = len;
if (user) {
if (copy_from_user(msg, buf, count))
return -EFAULT;
} else
memcpy(msg, buf, count);
spin_lock_irqsave(&dev.devlock, flags);
lastmap_card = dev.mcard;
lastmap_channel = dev.channel;
icn_map_channel(card, mch);
icn_putmsg(card, '>');
for (p = msg, pp = readb(&cmd_i), i = count; i > 0; i--, p++, pp
++) {
writeb((*p == '\n') ? 0xff : *p,
&dev.shmem->comm_buffers.pcio_buf[pp & 0xff]);
len--;
xcount++;
icn_putmsg(card, *p);
if ((*p == '\n') && (i > 1)) {
icn_putmsg(card, '>');
ocount++;
}
ocount++;
}
writeb((readb(&cmd_i) + count) & 0xff, &cmd_i);
if (lastmap_card)
icn_map_channel(lastmap_card, lastmap_channel);
spin_unlock_irqrestore(&dev.devlock, flags);
if (len) {
mdelay(1);
if (loop++ > 20)
break;
} else
break;
}
if (len && (!user))
printk(KERN_WARNING "icn: writemsg incomplete!\n");
cmd.command = ISDN_STAT_STAVAIL;
cmd.driver = card->myid;
cmd.arg = ocount;
card->interface.statcallb(&cmd);
return xcount;
}
/*
* Delete card's pending timers, send STOP to linklevel
*/
static void
icn_stopcard(icn_card * card)
{
unsigned long flags;
isdn_ctrl cmd;
spin_lock_irqsave(&card->lock, flags);
if (card->flags & ICN_FLAGS_RUNNING) {
card->flags &= ~ICN_FLAGS_RUNNING;
del_timer(&card->st_timer);
del_timer(&card->rb_timer);
spin_unlock_irqrestore(&card->lock, flags);
cmd.command = ISDN_STAT_STOP;
cmd.driver = card->myid;
card->interface.statcallb(&cmd);
if (card->doubleS0)
icn_stopcard(card->other);
} else
spin_unlock_irqrestore(&card->lock, flags);
}
static void
icn_stopallcards(void)
{
icn_card *p = cards;
while (p) {
icn_stopcard(p);
p = p->next;
}
}
/*
* Unmap all cards, because some of them may be mapped accidetly during
* autoprobing of some network drivers (SMC-driver?)
*/
static void
icn_disable_cards(void)
{
icn_card *card = cards;
while (card) {
if (!request_region(card->port, ICN_PORTLEN, "icn-isdn")) {
printk(KERN_WARNING
"icn: (%s) ports 0x%03x-0x%03x in use.\n",
CID,
card->port,
card->port + ICN_PORTLEN);
} else {
OUTB_P(0, ICN_RUN); /* Reset Controller */
OUTB_P(0, ICN_MAPRAM); /* Disable RAM */
release_region(card->port, ICN_PORTLEN);
}
card = card->next;
}
}
static int
icn_command(isdn_ctrl * c, icn_card * card)
{
ulong a;
ulong flags;
int i;
char cbuf[60];
isdn_ctrl cmd;
icn_cdef cdef;
char __user *arg;
switch (c->command) {
case ISDN_CMD_IOCTL:
memcpy(&a, c->parm.num, sizeof(ulong));
arg = (char __user *)a;
switch (c->arg) {
case ICN_IOCTL_SETMMIO:
if (dev.memaddr != (a & 0x0ffc000)) {
if (!request_mem_region(a & 0x0ffc000, 0x4000, "icn-isdn (all cards)")) {
printk(KERN_WARNING
"icn: memory at 0x%08lx in use.\n",
a & 0x0ffc000);
return -EINVAL;
}
release_mem_region(a & 0x0ffc000, 0x4000);
icn_stopallcards();
spin_lock_irqsave(&card->lock, flags);
if (dev.mvalid) {
iounmap(dev.shmem);
release_mem_region(dev.memaddr, 0x4000);
}
dev.mvalid = 0;
dev.memaddr = a & 0x0ffc000;
spin_unlock_irqrestore(&card->lock, flags);
printk(KERN_INFO
"icn: (%s) mmio set to 0x%08lx\n",
CID,
dev.memaddr);
}
break;
case ICN_IOCTL_GETMMIO:
return (long) dev.memaddr;
case ICN_IOCTL_SETPORT:
if (a == 0x300 || a == 0x310 || a == 0x320 || a == 0x330
|| a == 0x340 || a == 0x350 || a == 0x360 ||
a == 0x308 || a == 0x318 || a == 0x328 || a == 0x338
|| a == 0x348 || a == 0x358 || a == 0x368) {
if (card->port != (unsigned short) a) {
if (!request_region((unsigned short) a, ICN_PORTLEN, "icn-isdn")) {
printk(KERN_WARNING
"icn: (%s) ports 0x%03x-0x%03x in use.\n",
CID, (int) a, (int) a + ICN_PORTLEN);
return -EINVAL;
}
release_region((unsigned short) a, ICN_PORTLEN);
icn_stopcard(card);
spin_lock_irqsave(&card->lock, flags);
if (card->rvalid)
release_region(card->port, ICN_PORTLEN);
card->port = (unsigned short) a;
card->rvalid = 0;
if (card->doubleS0) {
card->other->port = (unsigned short) a;
card->other->rvalid = 0;
}
spin_unlock_irqrestore(&card->lock, flags);
printk(KERN_INFO
"icn: (%s) port set to 0x%03x\n",
CID, card->port);
}
} else
return -EINVAL;
break;
case ICN_IOCTL_GETPORT:
return (int) card->port;
case ICN_IOCTL_GETDOUBLE:
return (int) card->doubleS0;
case ICN_IOCTL_DEBUGVAR:
if (copy_to_user(arg,
&card,
sizeof(ulong)))
return -EFAULT;
a += sizeof(ulong);
{
ulong l = (ulong) & dev;
if (copy_to_user(arg,
&l,
sizeof(ulong)))
return -EFAULT;
}
return 0;
case ICN_IOCTL_LOADBOOT:
if (dev.firstload) {
icn_disable_cards();
dev.firstload = 0;
}
icn_stopcard(card);
return (icn_loadboot(arg, card));
case ICN_IOCTL_LOADPROTO:
icn_stopcard(card);
if ((i = (icn_loadproto(arg, card))))
return i;
if (card->doubleS0)
i = icn_loadproto(arg + ICN_CODE_STAGE2, card->other);
return i;
break;
case ICN_IOCTL_ADDCARD:
if (!dev.firstload)
return -EBUSY;
if (copy_from_user(&cdef,
arg,
sizeof(cdef)))
return -EFAULT;
return (icn_addcard(cdef.port, cdef.id1, cdef.id2));
break;
case ICN_IOCTL_LEASEDCFG:
if (a) {
if (!card->leased) {
card->leased = 1;
while (card->ptype == ISDN_PTYPE_UNKNOWN) {
msleep_interruptible(ICN_BOOT_TIMEOUT1);
}
msleep_interruptible(ICN_BOOT_TIMEOUT1);
sprintf(cbuf, "00;FV2ON\n01;EAZ%c\n02;EAZ%c\n",
(a & 1)?'1':'C', (a & 2)?'2':'C');
i = icn_writecmd(cbuf, strlen(cbuf), 0, card);
printk(KERN_INFO
"icn: (%s) Leased-line mode enabled\n",
CID);
cmd.command = ISDN_STAT_RUN;
cmd.driver = card->myid;
cmd.arg = 0;
card->interface.statcallb(&cmd);
}
} else {
if (card->leased) {
card->leased = 0;
sprintf(cbuf, "00;FV2OFF\n");
i = icn_writecmd(cbuf, strlen(cbuf), 0, card);
printk(KERN_INFO
"icn: (%s) Leased-line mode disabled\n",
CID);
cmd.command = ISDN_STAT_RUN;
cmd.driver = card->myid;
cmd.arg = 0;
card->interface.statcallb(&cmd);
}
}
return 0;
default:
return -EINVAL;
}
break;
case ISDN_CMD_DIAL:
if (!card->flags & ICN_FLAGS_RUNNING)
return -ENODEV;
if (card->leased)
break;
if ((c->arg & 255) < ICN_BCH) {
char *p;
char dial[50];
char dcode[4];
a = c->arg;
p = c->parm.setup.phone;
if (*p == 's' || *p == 'S') {
/* Dial for SPV */
p++;
strcpy(dcode, "SCA");
} else
/* Normal Dial */
strcpy(dcode, "CAL");
strcpy(dial, p);
sprintf(cbuf, "%02d;D%s_R%s,%02d,%02d,%s\n", (int) (a + 1),
dcode, dial, c->parm.setup.si1,
c->parm.setup.si2, c->parm.setup.eazmsn);
i = icn_writecmd(cbuf, strlen(cbuf), 0, card);
}
break;
case ISDN_CMD_ACCEPTD:
if (!card->flags & ICN_FLAGS_RUNNING)
return -ENODEV;
if (c->arg < ICN_BCH) {
a = c->arg + 1;
if (card->fw_rev >= 300) {
switch (card->l2_proto[a - 1]) {
case ISDN_PROTO_L2_X75I:
sprintf(cbuf, "%02d;BX75\n", (int) a);
break;
case ISDN_PROTO_L2_HDLC:
sprintf(cbuf, "%02d;BTRA\n", (int) a);
break;
}
i = icn_writecmd(cbuf, strlen(cbuf), 0, card);
}
sprintf(cbuf, "%02d;DCON_R\n", (int) a);
i = icn_writecmd(cbuf, strlen(cbuf), 0, card);
}
break;
case ISDN_CMD_ACCEPTB:
if (!card->flags & ICN_FLAGS_RUNNING)
return -ENODEV;
if (c->arg < ICN_BCH) {
a = c->arg + 1;
if (card->fw_rev >= 300)
switch (card->l2_proto[a - 1]) {
case ISDN_PROTO_L2_X75I:
sprintf(cbuf, "%02d;BCON_R,BX75\n", (int) a);
break;
case ISDN_PROTO_L2_HDLC:
sprintf(cbuf, "%02d;BCON_R,BTRA\n", (int) a);
break;
} else
sprintf(cbuf, "%02d;BCON_R\n", (int) a);
i = icn_writecmd(cbuf, strlen(cbuf), 0, card);
}
break;
case ISDN_CMD_HANGUP:
if (!card->flags & ICN_FLAGS_RUNNING)
return -ENODEV;
if (c->arg < ICN_BCH) {
a = c->arg + 1;
sprintf(cbuf, "%02d;BDIS_R\n%02d;DDIS_R\n", (int) a, (int) a);
i = icn_writecmd(cbuf, strlen(cbuf), 0, card);
}
break;
case ISDN_CMD_SETEAZ:
if (!card->flags & ICN_FLAGS_RUNNING)
return -ENODEV;
if (card->leased)
break;
if (c->arg < ICN_BCH) {
a = c->arg + 1;
if (card->ptype == ISDN_PTYPE_EURO) {
sprintf(cbuf, "%02d;MS%s%s\n", (int) a,
c->parm.num[0] ? "N" : "ALL", c->parm.num);
} else
sprintf(cbuf, "%02d;EAZ%s\n", (int) a,
c->parm.num[0] ? (char *)(c->parm.num) : "0123456789");
i = icn_writecmd(cbuf, strlen(cbuf), 0, card);
}
break;
case ISDN_CMD_CLREAZ:
if (!card->flags & ICN_FLAGS_RUNNING)
return -ENODEV;
if (card->leased)
break;
if (c->arg < ICN_BCH) {
a = c->arg + 1;
if (card->ptype == ISDN_PTYPE_EURO)
sprintf(cbuf, "%02d;MSNC\n", (int) a);
else
sprintf(cbuf, "%02d;EAZC\n", (int) a);
i = icn_writecmd(cbuf, strlen(cbuf), 0, card);
}
break;
case ISDN_CMD_SETL2:
if (!card->flags & ICN_FLAGS_RUNNING)
return -ENODEV;
if ((c->arg & 255) < ICN_BCH) {
a = c->arg;
switch (a >> 8) {
case ISDN_PROTO_L2_X75I:
sprintf(cbuf, "%02d;BX75\n", (int) (a & 255) + 1);
break;
case ISDN_PROTO_L2_HDLC:
sprintf(cbuf, "%02d;BTRA\n", (int) (a & 255) + 1);
break;
default:
return -EINVAL;
}
i = icn_writecmd(cbuf, strlen(cbuf), 0, card);
card->l2_proto[a & 255] = (a >> 8);
}
break;
case ISDN_CMD_SETL3:
if (!card->flags & ICN_FLAGS_RUNNING)
return -ENODEV;
return 0;
default:
return -EINVAL;
}
return 0;
}
/*
* Find card with given driverId
*/
static inline icn_card *
icn_findcard(int driverid)
{
icn_card *p = cards;
while (p) {
if (p->myid == driverid)
return p;
p = p->next;
}
return (icn_card *) 0;
}
/*
* Wrapper functions for interface to linklevel
*/
static int
if_command(isdn_ctrl * c)
{
icn_card *card = icn_findcard(c->driver);
if (card)
return (icn_command(c, card));
printk(KERN_ERR
"icn: if_command %d called with invalid driverId %d!\n",
c->command, c->driver);
return -ENODEV;
}
static int
if_writecmd(const u_char __user *buf, int len, int id, int channel)
{
icn_card *card = icn_findcard(id);
if (card) {
if (!card->flags & ICN_FLAGS_RUNNING)
return -ENODEV;
return (icn_writecmd(buf, len, 1, card));
}
printk(KERN_ERR
"icn: if_writecmd called with invalid driverId!\n");
return -ENODEV;
}
static int
if_readstatus(u_char __user *buf, int len, int id, int channel)
{
icn_card *card = icn_findcard(id);
if (card) {
if (!card->flags & ICN_FLAGS_RUNNING)
return -ENODEV;
return (icn_readstatus(buf, len, card));
}
printk(KERN_ERR
"icn: if_readstatus called with invalid driverId!\n");
return -ENODEV;
}
static int
if_sendbuf(int id, int channel, int ack, struct sk_buff *skb)
{
icn_card *card = icn_findcard(id);
if (card) {
if (!card->flags & ICN_FLAGS_RUNNING)
return -ENODEV;
return (icn_sendbuf(channel, ack, skb, card));
}
printk(KERN_ERR
"icn: if_sendbuf called with invalid driverId!\n");
return -ENODEV;
}
/*
* Allocate a new card-struct, initialize it
* link it into cards-list and register it at linklevel.
*/
static icn_card *
icn_initcard(int port, char *id)
{
icn_card *card;
int i;
if (!(card = (icn_card *) kmalloc(sizeof(icn_card), GFP_KERNEL))) {
printk(KERN_WARNING
"icn: (%s) Could not allocate card-struct.\n", id);
return (icn_card *) 0;
}
memset((char *) card, 0, sizeof(icn_card));
spin_lock_init(&card->lock);
card->port = port;
card->interface.owner = THIS_MODULE;
card->interface.hl_hdrlen = 1;
card->interface.channels = ICN_BCH;
card->interface.maxbufsize = 4000;
card->interface.command = if_command;
card->interface.writebuf_skb = if_sendbuf;
card->interface.writecmd = if_writecmd;
card->interface.readstat = if_readstatus;
card->interface.features = ISDN_FEATURE_L2_X75I |
ISDN_FEATURE_L2_HDLC |
ISDN_FEATURE_L3_TRANS |
ISDN_FEATURE_P_UNKNOWN;
card->ptype = ISDN_PTYPE_UNKNOWN;
strlcpy(card->interface.id, id, sizeof(card->interface.id));
card->msg_buf_write = card->msg_buf;
card->msg_buf_read = card->msg_buf;
card->msg_buf_end = &card->msg_buf[sizeof(card->msg_buf) - 1];
for (i = 0; i < ICN_BCH; i++) {
card->l2_proto[i] = ISDN_PROTO_L2_X75I;
skb_queue_head_init(&card->spqueue[i]);
}
card->next = cards;
cards = card;
if (!register_isdn(&card->interface)) {
cards = cards->next;
printk(KERN_WARNING
"icn: Unable to register %s\n", id);
kfree(card);
return (icn_card *) 0;
}
card->myid = card->interface.channels;
sprintf(card->regname, "icn-isdn (%s)", card->interface.id);
return card;
}
static int
icn_addcard(int port, char *id1, char *id2)
{
icn_card *card;
icn_card *card2;
if (!(card = icn_initcard(port, id1))) {
return -EIO;
}
if (!strlen(id2)) {
printk(KERN_INFO
"icn: (%s) ICN-2B, port 0x%x added\n",
card->interface.id, port);
return 0;
}
if (!(card2 = icn_initcard(port, id2))) {
printk(KERN_INFO
"icn: (%s) half ICN-4B, port 0x%x added\n",
card2->interface.id, port);
return 0;
}
card->doubleS0 = 1;
card->secondhalf = 0;
card->other = card2;
card2->doubleS0 = 1;
card2->secondhalf = 1;
card2->other = card;
printk(KERN_INFO
"icn: (%s and %s) ICN-4B, port 0x%x added\n",
card->interface.id, card2->interface.id, port);
return 0;
}
#ifndef MODULE
static int __init
icn_setup(char *line)
{
char *p, *str;
int ints[3];
static char sid[20];
static char sid2[20];
str = get_options(line, 2, ints);
if (ints[0])
portbase = ints[1];
if (ints[0] > 1)
membase = (unsigned long)ints[2];
if (str && *str) {
strcpy(sid, str);
icn_id = sid;
if ((p = strchr(sid, ','))) {
*p++ = 0;
strcpy(sid2, p);
icn_id2 = sid2;
}
}
return(1);
}
__setup("icn=", icn_setup);
#endif /* MODULE */
static int __init icn_init(void)
{
char *p;
char rev[10];
memset(&dev, 0, sizeof(icn_dev));
dev.memaddr = (membase & 0x0ffc000);
dev.channel = -1;
dev.mcard = NULL;
dev.firstload = 1;
spin_lock_init(&dev.devlock);
if ((p = strchr(revision, ':'))) {
strcpy(rev, p + 1);
p = strchr(rev, '$');
*p = 0;
} else
strcpy(rev, " ??? ");
printk(KERN_NOTICE "ICN-ISDN-driver Rev%smem=0x%08lx\n", rev,
dev.memaddr);
return (icn_addcard(portbase, icn_id, icn_id2));
}
static void __exit icn_exit(void)
{
isdn_ctrl cmd;
icn_card *card = cards;
icn_card *last, *tmpcard;
int i;
unsigned long flags;
icn_stopallcards();
while (card) {
cmd.command = ISDN_STAT_UNLOAD;
cmd.driver = card->myid;
card->interface.statcallb(&cmd);
spin_lock_irqsave(&card->lock, flags);
if (card->rvalid) {
OUTB_P(0, ICN_RUN); /* Reset Controller */
OUTB_P(0, ICN_MAPRAM); /* Disable RAM */
if (card->secondhalf || (!card->doubleS0)) {
release_region(card->port, ICN_PORTLEN);
card->rvalid = 0;
}
for (i = 0; i < ICN_BCH; i++)
icn_free_queue(card, i);
}
tmpcard = card->next;
spin_unlock_irqrestore(&card->lock, flags);
card = tmpcard;
}
card = cards;
cards = NULL;
while (card) {
last = card;
card = card->next;
kfree(last);
}
if (dev.mvalid) {
iounmap(dev.shmem);
release_mem_region(dev.memaddr, 0x4000);
}
printk(KERN_NOTICE "ICN-ISDN-driver unloaded\n");
}
module_init(icn_init);
module_exit(icn_exit);
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