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gerrit-public.fairphone.software / kernel / msm-4.9 / 4dbf6bc239c169b032777616806ecc648058f6b2 / . / drivers / isdn / i4l / isdn_tty.c
blob: fc8454d2eea5f9343be87eaf0f3e867fb4294ca4 [file] [log] [blame]
/* $Id: isdn_tty.c,v 1.1.2.3 2004/02/10 01:07:13 keil Exp $
*
* Linux ISDN subsystem, tty functions and AT-command emulator (linklevel).
*
* Copyright 1994-1999 by Fritz Elfert (fritz@isdn4linux.de)
* Copyright 1995,96 by Thinking Objects Software GmbH Wuerzburg
*
* This software may be used and distributed according to the terms
* of the GNU General Public License, incorporated herein by reference.
*
*/
#undef ISDN_TTY_STAT_DEBUG
#include <linux/isdn.h>
#include <linux/slab.h>
#include <linux/delay.h>
#include <linux/smp_lock.h>
#include "isdn_common.h"
#include "isdn_tty.h"
#ifdef CONFIG_ISDN_AUDIO
#include "isdn_audio.h"
#define VBUF 0x3e0
#define VBUFX (VBUF/16)
#endif
#define FIX_FILE_TRANSFER
#define DUMMY_HAYES_AT
/* Prototypes */
static int isdn_tty_edit_at(const char *, int, modem_info *);
static void isdn_tty_check_esc(const u_char *, u_char, int, int *, u_long *);
static void isdn_tty_modem_reset_regs(modem_info *, int);
static void isdn_tty_cmd_ATA(modem_info *);
static void isdn_tty_flush_buffer(struct tty_struct *);
static void isdn_tty_modem_result(int, modem_info *);
#ifdef CONFIG_ISDN_AUDIO
static int isdn_tty_countDLE(unsigned char *, int);
#endif
/* Leave this unchanged unless you know what you do! */
#define MODEM_PARANOIA_CHECK
#define MODEM_DO_RESTART
static int bit2si[8] =
{1, 5, 7, 7, 7, 7, 7, 7};
static int si2bit[8] =
{4, 1, 4, 4, 4, 4, 4, 4};
char *isdn_tty_revision = "$Revision: 1.1.2.3 $";
/* isdn_tty_try_read() is called from within isdn_tty_rcv_skb()
* to stuff incoming data directly into a tty's flip-buffer. This
* is done to speed up tty-receiving if the receive-queue is empty.
* This routine MUST be called with interrupts off.
* Return:
* 1 = Success
* 0 = Failure, data has to be buffered and later processed by
* isdn_tty_readmodem().
*/
static int
isdn_tty_try_read(modem_info * info, struct sk_buff *skb)
{
int c;
int len;
struct tty_struct *tty;
char last;
if (info->online) {
if ((tty = info->tty)) {
if (info->mcr & UART_MCR_RTS) {
len = skb->len
#ifdef CONFIG_ISDN_AUDIO
+ ISDN_AUDIO_SKB_DLECOUNT(skb)
#endif
;
c = tty_buffer_request_room(tty, len);
if (c >= len) {
#ifdef CONFIG_ISDN_AUDIO
if (ISDN_AUDIO_SKB_DLECOUNT(skb)) {
int l = skb->len;
unsigned char *dp = skb->data;
while (--l) {
if (*dp == DLE)
tty_insert_flip_char(tty, DLE, 0);
tty_insert_flip_char(tty, *dp++, 0);
}
if (*dp == DLE)
tty_insert_flip_char(tty, DLE, 0);
last = *dp;
} else {
#endif
if(len > 1)
tty_insert_flip_string(tty, skb->data, len - 1);
last = skb->data[len - 1];
#ifdef CONFIG_ISDN_AUDIO
}
#endif
if (info->emu.mdmreg[REG_CPPP] & BIT_CPPP)
tty_insert_flip_char(tty, last, 0xFF);
else
tty_insert_flip_char(tty, last, TTY_NORMAL);
tty_flip_buffer_push(tty);
kfree_skb(skb);
return 1;
}
}
}
}
return 0;
}
/* isdn_tty_readmodem() is called periodically from within timer-interrupt.
* It tries getting received data from the receive queue an stuff it into
* the tty's flip-buffer.
*/
void
isdn_tty_readmodem(void)
{
int resched = 0;
int midx;
int i;
int r;
struct tty_struct *tty;
modem_info *info;
for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
if ((midx = dev->m_idx[i]) >= 0) {
info = &dev->mdm.info[midx];
if (info->online) {
r = 0;
#ifdef CONFIG_ISDN_AUDIO
isdn_audio_eval_dtmf(info);
if ((info->vonline & 1) && (info->emu.vpar[1]))
isdn_audio_eval_silence(info);
#endif
if ((tty = info->tty)) {
if (info->mcr & UART_MCR_RTS) {
/* CISCO AsyncPPP Hack */
if (!(info->emu.mdmreg[REG_CPPP] & BIT_CPPP))
r = isdn_readbchan_tty(info->isdn_driver, info->isdn_channel, tty, 0);
else
r = isdn_readbchan_tty(info->isdn_driver, info->isdn_channel, tty, 1);
if (r)
tty_flip_buffer_push(tty);
} else
r = 1;
} else
r = 1;
if (r) {
info->rcvsched = 0;
resched = 1;
} else
info->rcvsched = 1;
}
}
}
if (!resched)
isdn_timer_ctrl(ISDN_TIMER_MODEMREAD, 0);
}
int
isdn_tty_rcv_skb(int i, int di, int channel, struct sk_buff *skb)
{
ulong flags;
int midx;
#ifdef CONFIG_ISDN_AUDIO
int ifmt;
#endif
modem_info *info;
if ((midx = dev->m_idx[i]) < 0) {
/* if midx is invalid, packet is not for tty */
return 0;
}
info = &dev->mdm.info[midx];
#ifdef CONFIG_ISDN_AUDIO
ifmt = 1;
if ((info->vonline) && (!info->emu.vpar[4]))
isdn_audio_calc_dtmf(info, skb->data, skb->len, ifmt);
if ((info->vonline & 1) && (info->emu.vpar[1]))
isdn_audio_calc_silence(info, skb->data, skb->len, ifmt);
#endif
if ((info->online < 2)
#ifdef CONFIG_ISDN_AUDIO
&& (!(info->vonline & 1))
#endif
) {
/* If Modem not listening, drop data */
kfree_skb(skb);
return 1;
}
if (info->emu.mdmreg[REG_T70] & BIT_T70) {
if (info->emu.mdmreg[REG_T70] & BIT_T70_EXT) {
/* T.70 decoding: throw away the T.70 header (2 or 4 bytes) */
if (skb->data[0] == 3) /* pure data packet -> 4 byte headers */
skb_pull(skb, 4);
else
if (skb->data[0] == 1) /* keepalive packet -> 2 byte hdr */
skb_pull(skb, 2);
} else
/* T.70 decoding: Simply throw away the T.70 header (4 bytes) */
if ((skb->data[0] == 1) && ((skb->data[1] == 0) || (skb->data[1] == 1)))
skb_pull(skb, 4);
}
#ifdef CONFIG_ISDN_AUDIO
ISDN_AUDIO_SKB_DLECOUNT(skb) = 0;
ISDN_AUDIO_SKB_LOCK(skb) = 0;
if (info->vonline & 1) {
/* voice conversion/compression */
switch (info->emu.vpar[3]) {
case 2:
case 3:
case 4:
/* adpcm
* Since compressed data takes less
* space, we can overwrite the buffer.
*/
skb_trim(skb, isdn_audio_xlaw2adpcm(info->adpcmr,
ifmt,
skb->data,
skb->data,
skb->len));
break;
case 5:
/* a-law */
if (!ifmt)
isdn_audio_ulaw2alaw(skb->data, skb->len);
break;
case 6:
/* u-law */
if (ifmt)
isdn_audio_alaw2ulaw(skb->data, skb->len);
break;
}
ISDN_AUDIO_SKB_DLECOUNT(skb) =
isdn_tty_countDLE(skb->data, skb->len);
}
#ifdef CONFIG_ISDN_TTY_FAX
else {
if (info->faxonline & 2) {
isdn_tty_fax_bitorder(info, skb);
ISDN_AUDIO_SKB_DLECOUNT(skb) =
isdn_tty_countDLE(skb->data, skb->len);
}
}
#endif
#endif
/* Try to deliver directly via tty-buf if queue is empty */
spin_lock_irqsave(&info->readlock, flags);
if (skb_queue_empty(&dev->drv[di]->rpqueue[channel]))
if (isdn_tty_try_read(info, skb)) {
spin_unlock_irqrestore(&info->readlock, flags);
return 1;
}
/* Direct deliver failed or queue wasn't empty.
* Queue up for later dequeueing via timer-irq.
*/
__skb_queue_tail(&dev->drv[di]->rpqueue[channel], skb);
dev->drv[di]->rcvcount[channel] +=
(skb->len
#ifdef CONFIG_ISDN_AUDIO
+ ISDN_AUDIO_SKB_DLECOUNT(skb)
#endif
);
spin_unlock_irqrestore(&info->readlock, flags);
/* Schedule dequeuing */
if ((dev->modempoll) && (info->rcvsched))
isdn_timer_ctrl(ISDN_TIMER_MODEMREAD, 1);
return 1;
}
static void
isdn_tty_cleanup_xmit(modem_info * info)
{
skb_queue_purge(&info->xmit_queue);
#ifdef CONFIG_ISDN_AUDIO
skb_queue_purge(&info->dtmf_queue);
#endif
}
static void
isdn_tty_tint(modem_info * info)
{
struct sk_buff *skb = skb_dequeue(&info->xmit_queue);
int len, slen;
if (!skb)
return;
len = skb->len;
if ((slen = isdn_writebuf_skb_stub(info->isdn_driver,
info->isdn_channel, 1, skb)) == len) {
struct tty_struct *tty = info->tty;
info->send_outstanding++;
info->msr &= ~UART_MSR_CTS;
info->lsr &= ~UART_LSR_TEMT;
tty_wakeup(tty);
return;
}
if (slen < 0) {
/* Error: no channel, already shutdown, or wrong parameter */
dev_kfree_skb(skb);
return;
}
skb_queue_head(&info->xmit_queue, skb);
}
#ifdef CONFIG_ISDN_AUDIO
static int
isdn_tty_countDLE(unsigned char *buf, int len)
{
int count = 0;
while (len--)
if (*buf++ == DLE)
count++;
return count;
}
/* This routine is called from within isdn_tty_write() to perform
* DLE-decoding when sending audio-data.
*/
static int
isdn_tty_handleDLEdown(modem_info * info, atemu * m, int len)
{
unsigned char *p = &info->xmit_buf[info->xmit_count];
int count = 0;
while (len > 0) {
if (m->lastDLE) {
m->lastDLE = 0;
switch (*p) {
case DLE:
/* Escape code */
if (len > 1)
memmove(p, p + 1, len - 1);
p--;
count++;
break;
case ETX:
/* End of data */
info->vonline |= 4;
return count;
case DC4:
/* Abort RX */
info->vonline &= ~1;
#ifdef ISDN_DEBUG_MODEM_VOICE
printk(KERN_DEBUG
"DLEdown: got DLE-DC4, send DLE-ETX on ttyI%d\n",
info->line);
#endif
isdn_tty_at_cout("\020\003", info);
if (!info->vonline) {
#ifdef ISDN_DEBUG_MODEM_VOICE
printk(KERN_DEBUG
"DLEdown: send VCON on ttyI%d\n",
info->line);
#endif
isdn_tty_at_cout("\r\nVCON\r\n", info);
}
/* Fall through */
case 'q':
case 's':
/* Silence */
if (len > 1)
memmove(p, p + 1, len - 1);
p--;
break;
}
} else {
if (*p == DLE)
m->lastDLE = 1;
else
count++;
}
p++;
len--;
}
if (len < 0) {
printk(KERN_WARNING "isdn_tty: len<0 in DLEdown\n");
return 0;
}
return count;
}
/* This routine is called from within isdn_tty_write() when receiving
* audio-data. It interrupts receiving, if an character other than
* ^S or ^Q is sent.
*/
static int
isdn_tty_end_vrx(const char *buf, int c)
{
char ch;
while (c--) {
ch = *buf;
if ((ch != 0x11) && (ch != 0x13))
return 1;
buf++;
}
return 0;
}
static int voice_cf[7] =
{0, 0, 4, 3, 2, 0, 0};
#endif /* CONFIG_ISDN_AUDIO */
/* isdn_tty_senddown() is called either directly from within isdn_tty_write()
* or via timer-interrupt from within isdn_tty_modem_xmit(). It pulls
* outgoing data from the tty's xmit-buffer, handles voice-decompression or
* T.70 if necessary, and finally queues it up for sending via isdn_tty_tint.
*/
static void
isdn_tty_senddown(modem_info * info)
{
int buflen;
int skb_res;
#ifdef CONFIG_ISDN_AUDIO
int audio_len;
#endif
struct sk_buff *skb;
#ifdef CONFIG_ISDN_AUDIO
if (info->vonline & 4) {
info->vonline &= ~6;
if (!info->vonline) {
#ifdef ISDN_DEBUG_MODEM_VOICE
printk(KERN_DEBUG
"senddown: send VCON on ttyI%d\n",
info->line);
#endif
isdn_tty_at_cout("\r\nVCON\r\n", info);
}
}
#endif
if (!(buflen = info->xmit_count))
return;
if ((info->emu.mdmreg[REG_CTS] & BIT_CTS) != 0)
info->msr &= ~UART_MSR_CTS;
info->lsr &= ~UART_LSR_TEMT;
/* info->xmit_count is modified here and in isdn_tty_write().
* So we return here if isdn_tty_write() is in the
* critical section.
*/
atomic_inc(&info->xmit_lock);
if (!(atomic_dec_and_test(&info->xmit_lock)))
return;
if (info->isdn_driver < 0) {
info->xmit_count = 0;
return;
}
skb_res = dev->drv[info->isdn_driver]->interface->hl_hdrlen + 4;
#ifdef CONFIG_ISDN_AUDIO
if (info->vonline & 2)
audio_len = buflen * voice_cf[info->emu.vpar[3]];
else
audio_len = 0;
skb = dev_alloc_skb(skb_res + buflen + audio_len);
#else
skb = dev_alloc_skb(skb_res + buflen);
#endif
if (!skb) {
printk(KERN_WARNING
"isdn_tty: Out of memory in ttyI%d senddown\n",
info->line);
return;
}
skb_reserve(skb, skb_res);
memcpy(skb_put(skb, buflen), info->xmit_buf, buflen);
info->xmit_count = 0;
#ifdef CONFIG_ISDN_AUDIO
if (info->vonline & 2) {
/* For now, ifmt is fixed to 1 (alaw), since this
* is used with ISDN everywhere in the world, except
* US, Canada and Japan.
* Later, when US-ISDN protocols are implemented,
* this setting will depend on the D-channel protocol.
*/
int ifmt = 1;
/* voice conversion/decompression */
switch (info->emu.vpar[3]) {
case 2:
case 3:
case 4:
/* adpcm, compatible to ZyXel 1496 modem
* with ROM revision 6.01
*/
audio_len = isdn_audio_adpcm2xlaw(info->adpcms,
ifmt,
skb->data,
skb_put(skb, audio_len),
buflen);
skb_pull(skb, buflen);
skb_trim(skb, audio_len);
break;
case 5:
/* a-law */
if (!ifmt)
isdn_audio_alaw2ulaw(skb->data,
buflen);
break;
case 6:
/* u-law */
if (ifmt)
isdn_audio_ulaw2alaw(skb->data,
buflen);
break;
}
}
#endif /* CONFIG_ISDN_AUDIO */
if (info->emu.mdmreg[REG_T70] & BIT_T70) {
/* Add T.70 simplified header */
if (info->emu.mdmreg[REG_T70] & BIT_T70_EXT)
memcpy(skb_push(skb, 2), "\1\0", 2);
else
memcpy(skb_push(skb, 4), "\1\0\1\0", 4);
}
skb_queue_tail(&info->xmit_queue, skb);
}
/************************************************************
*
* Modem-functions
*
* mostly "stolen" from original Linux-serial.c and friends.
*
************************************************************/
/* The next routine is called once from within timer-interrupt
* triggered within isdn_tty_modem_ncarrier(). It calls
* isdn_tty_modem_result() to stuff a "NO CARRIER" Message
* into the tty's buffer.
*/
static void
isdn_tty_modem_do_ncarrier(unsigned long data)
{
modem_info *info = (modem_info *) data;
isdn_tty_modem_result(RESULT_NO_CARRIER, info);
}
/* Next routine is called, whenever the DTR-signal is raised.
* It checks the ncarrier-flag, and triggers the above routine
* when necessary. The ncarrier-flag is set, whenever DTR goes
* low.
*/
static void
isdn_tty_modem_ncarrier(modem_info * info)
{
if (info->ncarrier) {
info->nc_timer.expires = jiffies + HZ;
add_timer(&info->nc_timer);
}
}
/*
* return the usage calculated by si and layer 2 protocol
*/
static int
isdn_calc_usage(int si, int l2)
{
int usg = ISDN_USAGE_MODEM;
#ifdef CONFIG_ISDN_AUDIO
if (si == 1) {
switch(l2) {
case ISDN_PROTO_L2_MODEM:
usg = ISDN_USAGE_MODEM;
break;
#ifdef CONFIG_ISDN_TTY_FAX
case ISDN_PROTO_L2_FAX:
usg = ISDN_USAGE_FAX;
break;
#endif
case ISDN_PROTO_L2_TRANS:
default:
usg = ISDN_USAGE_VOICE;
break;
}
}
#endif
return(usg);
}
/* isdn_tty_dial() performs dialing of a tty an the necessary
* setup of the lower levels before that.
*/
static void
isdn_tty_dial(char *n, modem_info * info, atemu * m)
{
int usg = ISDN_USAGE_MODEM;
int si = 7;
int l2 = m->mdmreg[REG_L2PROT];
u_long flags;
isdn_ctrl cmd;
int i;
int j;
for (j = 7; j >= 0; j--)
if (m->mdmreg[REG_SI1] & (1 << j)) {
si = bit2si[j];
break;
}
usg = isdn_calc_usage(si, l2);
#ifdef CONFIG_ISDN_AUDIO
if ((si == 1) &&
(l2 != ISDN_PROTO_L2_MODEM)
#ifdef CONFIG_ISDN_TTY_FAX
&& (l2 != ISDN_PROTO_L2_FAX)
#endif
) {
l2 = ISDN_PROTO_L2_TRANS;
usg = ISDN_USAGE_VOICE;
}
#endif
m->mdmreg[REG_SI1I] = si2bit[si];
spin_lock_irqsave(&dev->lock, flags);
i = isdn_get_free_channel(usg, l2, m->mdmreg[REG_L3PROT], -1, -1, m->msn);
if (i < 0) {
spin_unlock_irqrestore(&dev->lock, flags);
isdn_tty_modem_result(RESULT_NO_DIALTONE, info);
} else {
info->isdn_driver = dev->drvmap[i];
info->isdn_channel = dev->chanmap[i];
info->drv_index = i;
dev->m_idx[i] = info->line;
dev->usage[i] |= ISDN_USAGE_OUTGOING;
info->last_dir = 1;
strcpy(info->last_num, n);
isdn_info_update();
spin_unlock_irqrestore(&dev->lock, flags);
cmd.driver = info->isdn_driver;
cmd.arg = info->isdn_channel;
cmd.command = ISDN_CMD_CLREAZ;
isdn_command(&cmd);
strcpy(cmd.parm.num, isdn_map_eaz2msn(m->msn, info->isdn_driver));
cmd.driver = info->isdn_driver;
cmd.command = ISDN_CMD_SETEAZ;
isdn_command(&cmd);
cmd.driver = info->isdn_driver;
cmd.command = ISDN_CMD_SETL2;
info->last_l2 = l2;
cmd.arg = info->isdn_channel + (l2 << 8);
isdn_command(&cmd);
cmd.driver = info->isdn_driver;
cmd.command = ISDN_CMD_SETL3;
cmd.arg = info->isdn_channel + (m->mdmreg[REG_L3PROT] << 8);
#ifdef CONFIG_ISDN_TTY_FAX
if (l2 == ISDN_PROTO_L2_FAX) {
cmd.parm.fax = info->fax;
info->fax->direction = ISDN_TTY_FAX_CONN_OUT;
}
#endif
isdn_command(&cmd);
cmd.driver = info->isdn_driver;
cmd.arg = info->isdn_channel;
sprintf(cmd.parm.setup.phone, "%s", n);
sprintf(cmd.parm.setup.eazmsn, "%s",
isdn_map_eaz2msn(m->msn, info->isdn_driver));
cmd.parm.setup.si1 = si;
cmd.parm.setup.si2 = m->mdmreg[REG_SI2];
cmd.command = ISDN_CMD_DIAL;
info->dialing = 1;
info->emu.carrierwait = 0;
strcpy(dev->num[i], n);
isdn_info_update();
isdn_command(&cmd);
isdn_timer_ctrl(ISDN_TIMER_CARRIER, 1);
}
}
/* isdn_tty_hangup() disassociates a tty from the real
* ISDN-line (hangup). The usage-status is cleared
* and some cleanup is done also.
*/
void
isdn_tty_modem_hup(modem_info * info, int local)
{
isdn_ctrl cmd;
int di, ch;
if (!info)
return;
di = info->isdn_driver;
ch = info->isdn_channel;
if (di < 0 || ch < 0)
return;
info->isdn_driver = -1;
info->isdn_channel = -1;
#ifdef ISDN_DEBUG_MODEM_HUP
printk(KERN_DEBUG "Mhup ttyI%d\n", info->line);
#endif
info->rcvsched = 0;
isdn_tty_flush_buffer(info->tty);
if (info->online) {
info->last_lhup = local;
info->online = 0;
isdn_tty_modem_result(RESULT_NO_CARRIER, info);
}
#ifdef CONFIG_ISDN_AUDIO
info->vonline = 0;
#ifdef CONFIG_ISDN_TTY_FAX
info->faxonline = 0;
info->fax->phase = ISDN_FAX_PHASE_IDLE;
#endif
info->emu.vpar[4] = 0;
info->emu.vpar[5] = 8;
kfree(info->dtmf_state);
info->dtmf_state = NULL;
kfree(info->silence_state);
info->silence_state = NULL;
kfree(info->adpcms);
info->adpcms = NULL;
kfree(info->adpcmr);
info->adpcmr = NULL;
#endif
if ((info->msr & UART_MSR_RI) &&
(info->emu.mdmreg[REG_RUNG] & BIT_RUNG))
isdn_tty_modem_result(RESULT_RUNG, info);
info->msr &= ~(UART_MSR_DCD | UART_MSR_RI);
info->lsr |= UART_LSR_TEMT;
if (local) {
cmd.driver = di;
cmd.command = ISDN_CMD_HANGUP;
cmd.arg = ch;
isdn_command(&cmd);
}
isdn_all_eaz(di, ch);
info->emu.mdmreg[REG_RINGCNT] = 0;
isdn_free_channel(di, ch, 0);
if (info->drv_index >= 0) {
dev->m_idx[info->drv_index] = -1;
info->drv_index = -1;
}
}
/*
* Begin of a CAPI like interface, currently used only for
* supplementary service (CAPI 2.0 part III)
*/
#include <linux/isdn/capicmd.h>
int
isdn_tty_capi_facility(capi_msg *cm) {
return(-1); /* dummy */
}
/* isdn_tty_suspend() tries to suspend the current tty connection
*/
static void
isdn_tty_suspend(char *id, modem_info * info, atemu * m)
{
isdn_ctrl cmd;
int l;
if (!info)
return;
#ifdef ISDN_DEBUG_MODEM_SERVICES
printk(KERN_DEBUG "Msusp ttyI%d\n", info->line);
#endif
l = strlen(id);
if ((info->isdn_driver >= 0)) {
cmd.parm.cmsg.Length = l+18;
cmd.parm.cmsg.Command = CAPI_FACILITY;
cmd.parm.cmsg.Subcommand = CAPI_REQ;
cmd.parm.cmsg.adr.Controller = info->isdn_driver + 1;
cmd.parm.cmsg.para[0] = 3; /* 16 bit 0x0003 suplementary service */
cmd.parm.cmsg.para[1] = 0;
cmd.parm.cmsg.para[2] = l + 3;
cmd.parm.cmsg.para[3] = 4; /* 16 bit 0x0004 Suspend */
cmd.parm.cmsg.para[4] = 0;
cmd.parm.cmsg.para[5] = l;
strncpy(&cmd.parm.cmsg.para[6], id, l);
cmd.command = CAPI_PUT_MESSAGE;
cmd.driver = info->isdn_driver;
cmd.arg = info->isdn_channel;
isdn_command(&cmd);
}
}
/* isdn_tty_resume() tries to resume a suspended call
* setup of the lower levels before that. unfortunatly here is no
* checking for compatibility of used protocols implemented by Q931
* It does the same things like isdn_tty_dial, the last command
* is different, may be we can merge it.
*/
static void
isdn_tty_resume(char *id, modem_info * info, atemu * m)
{
int usg = ISDN_USAGE_MODEM;
int si = 7;
int l2 = m->mdmreg[REG_L2PROT];
isdn_ctrl cmd;
ulong flags;
int i;
int j;
int l;
l = strlen(id);
for (j = 7; j >= 0; j--)
if (m->mdmreg[REG_SI1] & (1 << j)) {
si = bit2si[j];
break;
}
usg = isdn_calc_usage(si, l2);
#ifdef CONFIG_ISDN_AUDIO
if ((si == 1) &&
(l2 != ISDN_PROTO_L2_MODEM)
#ifdef CONFIG_ISDN_TTY_FAX
&& (l2 != ISDN_PROTO_L2_FAX)
#endif
) {
l2 = ISDN_PROTO_L2_TRANS;
usg = ISDN_USAGE_VOICE;
}
#endif
m->mdmreg[REG_SI1I] = si2bit[si];
spin_lock_irqsave(&dev->lock, flags);
i = isdn_get_free_channel(usg, l2, m->mdmreg[REG_L3PROT], -1, -1, m->msn);
if (i < 0) {
spin_unlock_irqrestore(&dev->lock, flags);
isdn_tty_modem_result(RESULT_NO_DIALTONE, info);
} else {
info->isdn_driver = dev->drvmap[i];
info->isdn_channel = dev->chanmap[i];
info->drv_index = i;
dev->m_idx[i] = info->line;
dev->usage[i] |= ISDN_USAGE_OUTGOING;
info->last_dir = 1;
// strcpy(info->last_num, n);
isdn_info_update();
spin_unlock_irqrestore(&dev->lock, flags);
cmd.driver = info->isdn_driver;
cmd.arg = info->isdn_channel;
cmd.command = ISDN_CMD_CLREAZ;
isdn_command(&cmd);
strcpy(cmd.parm.num, isdn_map_eaz2msn(m->msn, info->isdn_driver));
cmd.driver = info->isdn_driver;
cmd.command = ISDN_CMD_SETEAZ;
isdn_command(&cmd);
cmd.driver = info->isdn_driver;
cmd.command = ISDN_CMD_SETL2;
info->last_l2 = l2;
cmd.arg = info->isdn_channel + (l2 << 8);
isdn_command(&cmd);
cmd.driver = info->isdn_driver;
cmd.command = ISDN_CMD_SETL3;
cmd.arg = info->isdn_channel + (m->mdmreg[REG_L3PROT] << 8);
isdn_command(&cmd);
cmd.driver = info->isdn_driver;
cmd.arg = info->isdn_channel;
cmd.parm.cmsg.Length = l+18;
cmd.parm.cmsg.Command = CAPI_FACILITY;
cmd.parm.cmsg.Subcommand = CAPI_REQ;
cmd.parm.cmsg.adr.Controller = info->isdn_driver + 1;
cmd.parm.cmsg.para[0] = 3; /* 16 bit 0x0003 suplementary service */
cmd.parm.cmsg.para[1] = 0;
cmd.parm.cmsg.para[2] = l+3;
cmd.parm.cmsg.para[3] = 5; /* 16 bit 0x0005 Resume */
cmd.parm.cmsg.para[4] = 0;
cmd.parm.cmsg.para[5] = l;
strncpy(&cmd.parm.cmsg.para[6], id, l);
cmd.command =CAPI_PUT_MESSAGE;
info->dialing = 1;
// strcpy(dev->num[i], n);
isdn_info_update();
isdn_command(&cmd);
isdn_timer_ctrl(ISDN_TIMER_CARRIER, 1);
}
}
/* isdn_tty_send_msg() sends a message to a HL driver
* This is used for hybrid modem cards to send AT commands to it
*/
static void
isdn_tty_send_msg(modem_info * info, atemu * m, char *msg)
{
int usg = ISDN_USAGE_MODEM;
int si = 7;
int l2 = m->mdmreg[REG_L2PROT];
isdn_ctrl cmd;
ulong flags;
int i;
int j;
int l;
l = strlen(msg);
if (!l) {
isdn_tty_modem_result(RESULT_ERROR, info);
return;
}
for (j = 7; j >= 0; j--)
if (m->mdmreg[REG_SI1] & (1 << j)) {
si = bit2si[j];
break;
}
usg = isdn_calc_usage(si, l2);
#ifdef CONFIG_ISDN_AUDIO
if ((si == 1) &&
(l2 != ISDN_PROTO_L2_MODEM)
#ifdef CONFIG_ISDN_TTY_FAX
&& (l2 != ISDN_PROTO_L2_FAX)
#endif
) {
l2 = ISDN_PROTO_L2_TRANS;
usg = ISDN_USAGE_VOICE;
}
#endif
m->mdmreg[REG_SI1I] = si2bit[si];
spin_lock_irqsave(&dev->lock, flags);
i = isdn_get_free_channel(usg, l2, m->mdmreg[REG_L3PROT], -1, -1, m->msn);
if (i < 0) {
spin_unlock_irqrestore(&dev->lock, flags);
isdn_tty_modem_result(RESULT_NO_DIALTONE, info);
} else {
info->isdn_driver = dev->drvmap[i];
info->isdn_channel = dev->chanmap[i];
info->drv_index = i;
dev->m_idx[i] = info->line;
dev->usage[i] |= ISDN_USAGE_OUTGOING;
info->last_dir = 1;
isdn_info_update();
spin_unlock_irqrestore(&dev->lock, flags);
cmd.driver = info->isdn_driver;
cmd.arg = info->isdn_channel;
cmd.command = ISDN_CMD_CLREAZ;
isdn_command(&cmd);
strcpy(cmd.parm.num, isdn_map_eaz2msn(m->msn, info->isdn_driver));
cmd.driver = info->isdn_driver;
cmd.command = ISDN_CMD_SETEAZ;
isdn_command(&cmd);
cmd.driver = info->isdn_driver;
cmd.command = ISDN_CMD_SETL2;
info->last_l2 = l2;
cmd.arg = info->isdn_channel + (l2 << 8);
isdn_command(&cmd);
cmd.driver = info->isdn_driver;
cmd.command = ISDN_CMD_SETL3;
cmd.arg = info->isdn_channel + (m->mdmreg[REG_L3PROT] << 8);
isdn_command(&cmd);
cmd.driver = info->isdn_driver;
cmd.arg = info->isdn_channel;
cmd.parm.cmsg.Length = l+14;
cmd.parm.cmsg.Command = CAPI_MANUFACTURER;
cmd.parm.cmsg.Subcommand = CAPI_REQ;
cmd.parm.cmsg.adr.Controller = info->isdn_driver + 1;
cmd.parm.cmsg.para[0] = l+1;
strncpy(&cmd.parm.cmsg.para[1], msg, l);
cmd.parm.cmsg.para[l+1] = 0xd;
cmd.command =CAPI_PUT_MESSAGE;
/* info->dialing = 1;
strcpy(dev->num[i], n);
isdn_info_update();
*/
isdn_command(&cmd);
}
}
static inline int
isdn_tty_paranoia_check(modem_info *info, char *name, const char *routine)
{
#ifdef MODEM_PARANOIA_CHECK
if (!info) {
printk(KERN_WARNING "isdn_tty: null info_struct for %s in %s\n",
name, routine);
return 1;
}
if (info->magic != ISDN_ASYNC_MAGIC) {
printk(KERN_WARNING "isdn_tty: bad magic for modem struct %s in %s\n",
name, routine);
return 1;
}
#endif
return 0;
}
/*
* This routine is called to set the UART divisor registers to match
* the specified baud rate for a serial port.
*/
static void
isdn_tty_change_speed(modem_info * info)
{
uint cflag,
cval,
fcr,
quot;
int i;
if (!info->tty || !info->tty->termios)
return;
cflag = info->tty->termios->c_cflag;
quot = i = cflag & CBAUD;
if (i & CBAUDEX) {
i &= ~CBAUDEX;
if (i < 1 || i > 2)
info->tty->termios->c_cflag &= ~CBAUDEX;
else
i += 15;
}
if (quot) {
info->mcr |= UART_MCR_DTR;
isdn_tty_modem_ncarrier(info);
} else {
info->mcr &= ~UART_MCR_DTR;
if (info->emu.mdmreg[REG_DTRHUP] & BIT_DTRHUP) {
#ifdef ISDN_DEBUG_MODEM_HUP
printk(KERN_DEBUG "Mhup in changespeed\n");
#endif
if (info->online)
info->ncarrier = 1;
isdn_tty_modem_reset_regs(info, 0);
isdn_tty_modem_hup(info, 1);
}
return;
}
/* byte size and parity */
cval = cflag & (CSIZE | CSTOPB);
cval >>= 4;
if (cflag & PARENB)
cval |= UART_LCR_PARITY;
if (!(cflag & PARODD))
cval |= UART_LCR_EPAR;
fcr = 0;
/* CTS flow control flag and modem status interrupts */
if (cflag & CRTSCTS) {
info->flags |= ISDN_ASYNC_CTS_FLOW;
} else
info->flags &= ~ISDN_ASYNC_CTS_FLOW;
if (cflag & CLOCAL)
info->flags &= ~ISDN_ASYNC_CHECK_CD;
else {
info->flags |= ISDN_ASYNC_CHECK_CD;
}
}
static int
isdn_tty_startup(modem_info * info)
{
if (info->flags & ISDN_ASYNC_INITIALIZED)
return 0;
isdn_lock_drivers();
#ifdef ISDN_DEBUG_MODEM_OPEN
printk(KERN_DEBUG "starting up ttyi%d ...\n", info->line);
#endif
/*
* Now, initialize the UART
*/
info->mcr = UART_MCR_DTR | UART_MCR_RTS | UART_MCR_OUT2;
if (info->tty)
clear_bit(TTY_IO_ERROR, &info->tty->flags);
/*
* and set the speed of the serial port
*/
isdn_tty_change_speed(info);
info->flags |= ISDN_ASYNC_INITIALIZED;
info->msr |= (UART_MSR_DSR | UART_MSR_CTS);
info->send_outstanding = 0;
return 0;
}
/*
* This routine will shutdown a serial port; interrupts are disabled, and
* DTR is dropped if the hangup on close termio flag is on.
*/
static void
isdn_tty_shutdown(modem_info * info)
{
if (!(info->flags & ISDN_ASYNC_INITIALIZED))
return;
#ifdef ISDN_DEBUG_MODEM_OPEN
printk(KERN_DEBUG "Shutting down isdnmodem port %d ....\n", info->line);
#endif
isdn_unlock_drivers();
info->msr &= ~UART_MSR_RI;
if (!info->tty || (info->tty->termios->c_cflag & HUPCL)) {
info->mcr &= ~(UART_MCR_DTR | UART_MCR_RTS);
if (info->emu.mdmreg[REG_DTRHUP] & BIT_DTRHUP) {
isdn_tty_modem_reset_regs(info, 0);
#ifdef ISDN_DEBUG_MODEM_HUP
printk(KERN_DEBUG "Mhup in isdn_tty_shutdown\n");
#endif
isdn_tty_modem_hup(info, 1);
}
}
if (info->tty)
set_bit(TTY_IO_ERROR, &info->tty->flags);
info->flags &= ~ISDN_ASYNC_INITIALIZED;
}
/* isdn_tty_write() is the main send-routine. It is called from the upper
* levels within the kernel to perform sending data. Depending on the
* online-flag it either directs output to the at-command-interpreter or
* to the lower level. Additional tasks done here:
* - If online, check for escape-sequence (+++)
* - If sending audio-data, call isdn_tty_DLEdown() to parse DLE-codes.
* - If receiving audio-data, call isdn_tty_end_vrx() to abort if needed.
* - If dialing, abort dial.
*/
static int
isdn_tty_write(struct tty_struct *tty, const u_char * buf, int count)
{
int c;
int total = 0;
modem_info *info = (modem_info *) tty->driver_data;
atemu *m = &info->emu;
if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_write"))
return 0;
/* See isdn_tty_senddown() */
atomic_inc(&info->xmit_lock);
while (1) {
c = count;
if (c > info->xmit_size - info->xmit_count)
c = info->xmit_size - info->xmit_count;
if (info->isdn_driver >= 0 && c > dev->drv[info->isdn_driver]->maxbufsize)
c = dev->drv[info->isdn_driver]->maxbufsize;
if (c <= 0)
break;
if ((info->online > 1)
#ifdef CONFIG_ISDN_AUDIO
|| (info->vonline & 3)
#endif
) {
#ifdef CONFIG_ISDN_AUDIO
if (!info->vonline)
#endif
isdn_tty_check_esc(buf, m->mdmreg[REG_ESC], c,
&(m->pluscount),
&(m->lastplus));
memcpy(&(info->xmit_buf[info->xmit_count]), buf, c);
#ifdef CONFIG_ISDN_AUDIO
if (info->vonline) {
int cc = isdn_tty_handleDLEdown(info, m, c);
if (info->vonline & 2) {
if (!cc) {
/* If DLE decoding results in zero-transmit, but
* c originally was non-zero, do a wakeup.
*/
tty_wakeup(tty);
info->msr |= UART_MSR_CTS;
info->lsr |= UART_LSR_TEMT;
}
info->xmit_count += cc;
}
if ((info->vonline & 3) == 1) {
/* Do NOT handle Ctrl-Q or Ctrl-S
* when in full-duplex audio mode.
*/
if (isdn_tty_end_vrx(buf, c)) {
info->vonline &= ~1;
#ifdef ISDN_DEBUG_MODEM_VOICE
printk(KERN_DEBUG
"got !^Q/^S, send DLE-ETX,VCON on ttyI%d\n",
info->line);
#endif
isdn_tty_at_cout("\020\003\r\nVCON\r\n", info);
}
}
} else
if (TTY_IS_FCLASS1(info)) {
int cc = isdn_tty_handleDLEdown(info, m, c);
if (info->vonline & 4) { /* ETX seen */
isdn_ctrl c;
c.command = ISDN_CMD_FAXCMD;
c.driver = info->isdn_driver;
c.arg = info->isdn_channel;
c.parm.aux.cmd = ISDN_FAX_CLASS1_CTRL;
c.parm.aux.subcmd = ETX;
isdn_command(&c);
}
info->vonline = 0;
#ifdef ISDN_DEBUG_MODEM_VOICE
printk(KERN_DEBUG "fax dle cc/c %d/%d\n", cc, c);
#endif
info->xmit_count += cc;
} else
#endif
info->xmit_count += c;
} else {
info->msr |= UART_MSR_CTS;
info->lsr |= UART_LSR_TEMT;
if (info->dialing) {
info->dialing = 0;
#ifdef ISDN_DEBUG_MODEM_HUP
printk(KERN_DEBUG "Mhup in isdn_tty_write\n");
#endif
isdn_tty_modem_result(RESULT_NO_CARRIER, info);
isdn_tty_modem_hup(info, 1);
} else
c = isdn_tty_edit_at(buf, c, info);
}
buf += c;
count -= c;
total += c;
}
atomic_dec(&info->xmit_lock);
if ((info->xmit_count) || !skb_queue_empty(&info->xmit_queue)) {
if (m->mdmreg[REG_DXMT] & BIT_DXMT) {
isdn_tty_senddown(info);
isdn_tty_tint(info);
}
isdn_timer_ctrl(ISDN_TIMER_MODEMXMIT, 1);
}
return total;
}
static int
isdn_tty_write_room(struct tty_struct *tty)
{
modem_info *info = (modem_info *) tty->driver_data;
int ret;
if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_write_room"))
return 0;
if (!info->online)
return info->xmit_size;
ret = info->xmit_size - info->xmit_count;
return (ret < 0) ? 0 : ret;
}
static int
isdn_tty_chars_in_buffer(struct tty_struct *tty)
{
modem_info *info = (modem_info *) tty->driver_data;
if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_chars_in_buffer"))
return 0;
if (!info->online)
return 0;
return (info->xmit_count);
}
static void
isdn_tty_flush_buffer(struct tty_struct *tty)
{
modem_info *info;
if (!tty) {
return;
}
info = (modem_info *) tty->driver_data;
if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_flush_buffer")) {
return;
}
isdn_tty_cleanup_xmit(info);
info->xmit_count = 0;
tty_wakeup(tty);
}
static void
isdn_tty_flush_chars(struct tty_struct *tty)
{
modem_info *info = (modem_info *) tty->driver_data;
if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_flush_chars"))
return;
if ((info->xmit_count) || !skb_queue_empty(&info->xmit_queue))
isdn_timer_ctrl(ISDN_TIMER_MODEMXMIT, 1);
}
/*
* ------------------------------------------------------------
* isdn_tty_throttle()
*
* This routine is called by the upper-layer tty layer to signal that
* incoming characters should be throttled.
* ------------------------------------------------------------
*/
static void
isdn_tty_throttle(struct tty_struct *tty)
{
modem_info *info = (modem_info *) tty->driver_data;
if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_throttle"))
return;
if (I_IXOFF(tty))
info->x_char = STOP_CHAR(tty);
info->mcr &= ~UART_MCR_RTS;
}
static void
isdn_tty_unthrottle(struct tty_struct *tty)
{
modem_info *info = (modem_info *) tty->driver_data;
if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_unthrottle"))
return;
if (I_IXOFF(tty)) {
if (info->x_char)
info->x_char = 0;
else
info->x_char = START_CHAR(tty);
}
info->mcr |= UART_MCR_RTS;
}
/*
* ------------------------------------------------------------
* isdn_tty_ioctl() and friends
* ------------------------------------------------------------
*/
/*
* isdn_tty_get_lsr_info - get line status register info
*
* Purpose: Let user call ioctl() to get info when the UART physically
* is emptied. On bus types like RS485, the transmitter must
* release the bus after transmitting. This must be done when
* the transmit shift register is empty, not be done when the
* transmit holding register is empty. This functionality
* allows RS485 driver to be written in user space.
*/
static int
isdn_tty_get_lsr_info(modem_info * info, uint __user * value)
{
u_char status;
uint result;
status = info->lsr;
result = ((status & UART_LSR_TEMT) ? TIOCSER_TEMT : 0);
return put_user(result, value);
}
static int
isdn_tty_tiocmget(struct tty_struct *tty, struct file *file)
{
modem_info *info = (modem_info *) tty->driver_data;
u_char control, status;
if (isdn_tty_paranoia_check(info, tty->name, __func__))
return -ENODEV;
if (tty->flags & (1 << TTY_IO_ERROR))
return -EIO;
lock_kernel();
#ifdef ISDN_DEBUG_MODEM_IOCTL
printk(KERN_DEBUG "ttyI%d ioctl TIOCMGET\n", info->line);
#endif
control = info->mcr;
status = info->msr;
unlock_kernel();
return ((control & UART_MCR_RTS) ? TIOCM_RTS : 0)
| ((control & UART_MCR_DTR) ? TIOCM_DTR : 0)
| ((status & UART_MSR_DCD) ? TIOCM_CAR : 0)
| ((status & UART_MSR_RI) ? TIOCM_RNG : 0)
| ((status & UART_MSR_DSR) ? TIOCM_DSR : 0)
| ((status & UART_MSR_CTS) ? TIOCM_CTS : 0);
}
static int
isdn_tty_tiocmset(struct tty_struct *tty, struct file *file,
unsigned int set, unsigned int clear)
{
modem_info *info = (modem_info *) tty->driver_data;
if (isdn_tty_paranoia_check(info, tty->name, __func__))
return -ENODEV;
if (tty->flags & (1 << TTY_IO_ERROR))
return -EIO;
#ifdef ISDN_DEBUG_MODEM_IOCTL
printk(KERN_DEBUG "ttyI%d ioctl TIOCMxxx: %x %x\n", info->line, set, clear);
#endif
lock_kernel();
if (set & TIOCM_RTS)
info->mcr |= UART_MCR_RTS;
if (set & TIOCM_DTR) {
info->mcr |= UART_MCR_DTR;
isdn_tty_modem_ncarrier(info);
}
if (clear & TIOCM_RTS)
info->mcr &= ~UART_MCR_RTS;
if (clear & TIOCM_DTR) {
info->mcr &= ~UART_MCR_DTR;
if (info->emu.mdmreg[REG_DTRHUP] & BIT_DTRHUP) {
isdn_tty_modem_reset_regs(info, 0);
#ifdef ISDN_DEBUG_MODEM_HUP
printk(KERN_DEBUG "Mhup in TIOCMSET\n");
#endif
if (info->online)
info->ncarrier = 1;
isdn_tty_modem_hup(info, 1);
}
}
unlock_kernel();
return 0;
}
static int
isdn_tty_ioctl(struct tty_struct *tty, struct file *file,
uint cmd, ulong arg)
{
modem_info *info = (modem_info *) tty->driver_data;
int retval;
if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_ioctl"))
return -ENODEV;
if (tty->flags & (1 << TTY_IO_ERROR))
return -EIO;
switch (cmd) {
case TCSBRK: /* SVID version: non-zero arg --> no break */
#ifdef ISDN_DEBUG_MODEM_IOCTL
printk(KERN_DEBUG "ttyI%d ioctl TCSBRK\n", info->line);
#endif
retval = tty_check_change(tty);
if (retval)
return retval;
tty_wait_until_sent(tty, 0);
return 0;
case TCSBRKP: /* support for POSIX tcsendbreak() */
#ifdef ISDN_DEBUG_MODEM_IOCTL
printk(KERN_DEBUG "ttyI%d ioctl TCSBRKP\n", info->line);
#endif
retval = tty_check_change(tty);
if (retval)
return retval;
tty_wait_until_sent(tty, 0);
return 0;
case TIOCSERGETLSR: /* Get line status register */
#ifdef ISDN_DEBUG_MODEM_IOCTL
printk(KERN_DEBUG "ttyI%d ioctl TIOCSERGETLSR\n", info->line);
#endif
return isdn_tty_get_lsr_info(info, (uint __user *) arg);
default:
#ifdef ISDN_DEBUG_MODEM_IOCTL
printk(KERN_DEBUG "UNKNOWN ioctl 0x%08x on ttyi%d\n", cmd, info->line);
#endif
return -ENOIOCTLCMD;
}
return 0;
}
static void
isdn_tty_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
{
modem_info *info = (modem_info *) tty->driver_data;
if (!old_termios)
isdn_tty_change_speed(info);
else {
if (tty->termios->c_cflag == old_termios->c_cflag &&
tty->termios->c_ispeed == old_termios->c_ispeed &&
tty->termios->c_ospeed == old_termios->c_ospeed)
return;
isdn_tty_change_speed(info);
if ((old_termios->c_cflag & CRTSCTS) &&
!(tty->termios->c_cflag & CRTSCTS))
tty->hw_stopped = 0;
}
}
/*
* ------------------------------------------------------------
* isdn_tty_open() and friends
* ------------------------------------------------------------
*/
static int
isdn_tty_block_til_ready(struct tty_struct *tty, struct file *filp, modem_info * info)
{
DECLARE_WAITQUEUE(wait, NULL);
int do_clocal = 0;
int retval;
/*
* If the device is in the middle of being closed, then block
* until it's done, and then try again.
*/
if (tty_hung_up_p(filp) ||
(info->flags & ISDN_ASYNC_CLOSING)) {
if (info->flags & ISDN_ASYNC_CLOSING)
interruptible_sleep_on(&info->close_wait);
#ifdef MODEM_DO_RESTART
if (info->flags & ISDN_ASYNC_HUP_NOTIFY)
return -EAGAIN;
else
return -ERESTARTSYS;
#else
return -EAGAIN;
#endif
}
/*
* If non-blocking mode is set, then make the check up front
* and then exit.
*/
if ((filp->f_flags & O_NONBLOCK) ||
(tty->flags & (1 << TTY_IO_ERROR))) {
if (info->flags & ISDN_ASYNC_CALLOUT_ACTIVE)
return -EBUSY;
info->flags |= ISDN_ASYNC_NORMAL_ACTIVE;
return 0;
}
if (info->flags & ISDN_ASYNC_CALLOUT_ACTIVE) {
if (info->normal_termios.c_cflag & CLOCAL)
do_clocal = 1;
} else {
if (tty->termios->c_cflag & CLOCAL)
do_clocal = 1;
}
/*
* Block waiting for the carrier detect and the line to become
* free (i.e., not in use by the callout). While we are in
* this loop, info->count is dropped by one, so that
* isdn_tty_close() knows when to free things. We restore it upon
* exit, either normal or abnormal.
*/
retval = 0;
add_wait_queue(&info->open_wait, &wait);
#ifdef ISDN_DEBUG_MODEM_OPEN
printk(KERN_DEBUG "isdn_tty_block_til_ready before block: ttyi%d, count = %d\n",
info->line, info->count);
#endif
if (!(tty_hung_up_p(filp)))
info->count--;
info->blocked_open++;
while (1) {
set_current_state(TASK_INTERRUPTIBLE);
if (tty_hung_up_p(filp) ||
!(info->flags & ISDN_ASYNC_INITIALIZED)) {
#ifdef MODEM_DO_RESTART
if (info->flags & ISDN_ASYNC_HUP_NOTIFY)
retval = -EAGAIN;
else
retval = -ERESTARTSYS;
#else
retval = -EAGAIN;
#endif
break;
}
if (!(info->flags & ISDN_ASYNC_CALLOUT_ACTIVE) &&
!(info->flags & ISDN_ASYNC_CLOSING) &&
(do_clocal || (info->msr & UART_MSR_DCD))) {
break;
}
if (signal_pending(current)) {
retval = -ERESTARTSYS;
break;
}
#ifdef ISDN_DEBUG_MODEM_OPEN
printk(KERN_DEBUG "isdn_tty_block_til_ready blocking: ttyi%d, count = %d\n",
info->line, info->count);
#endif
schedule();
}
current->state = TASK_RUNNING;
remove_wait_queue(&info->open_wait, &wait);
if (!tty_hung_up_p(filp))
info->count++;
info->blocked_open--;
#ifdef ISDN_DEBUG_MODEM_OPEN
printk(KERN_DEBUG "isdn_tty_block_til_ready after blocking: ttyi%d, count = %d\n",
info->line, info->count);
#endif
if (retval)
return retval;
info->flags |= ISDN_ASYNC_NORMAL_ACTIVE;
return 0;
}
/*
* This routine is called whenever a serial port is opened. It
* enables interrupts for a serial port, linking in its async structure into
* the IRQ chain. It also performs the serial-specific
* initialization for the tty structure.
*/
static int
isdn_tty_open(struct tty_struct *tty, struct file *filp)
{
modem_info *info;
int retval, line;
line = tty->index;
if (line < 0 || line >= ISDN_MAX_CHANNELS)
return -ENODEV;
info = &dev->mdm.info[line];
if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_open"))
return -ENODEV;
if (!try_module_get(info->owner)) {
printk(KERN_WARNING "%s: cannot reserve module\n", __func__);
return -ENODEV;
}
#ifdef ISDN_DEBUG_MODEM_OPEN
printk(KERN_DEBUG "isdn_tty_open %s, count = %d\n", tty->name,
info->count);
#endif
info->count++;
tty->driver_data = info;
info->tty = tty;
/*
* Start up serial port
*/
retval = isdn_tty_startup(info);
if (retval) {
#ifdef ISDN_DEBUG_MODEM_OPEN
printk(KERN_DEBUG "isdn_tty_open return after startup\n");
#endif
module_put(info->owner);
return retval;
}
retval = isdn_tty_block_til_ready(tty, filp, info);
if (retval) {
#ifdef ISDN_DEBUG_MODEM_OPEN
printk(KERN_DEBUG "isdn_tty_open return after isdn_tty_block_til_ready \n");
#endif
module_put(info->owner);
return retval;
}
#ifdef ISDN_DEBUG_MODEM_OPEN
printk(KERN_DEBUG "isdn_tty_open ttyi%d successful...\n", info->line);
#endif
dev->modempoll++;
#ifdef ISDN_DEBUG_MODEM_OPEN
printk(KERN_DEBUG "isdn_tty_open normal exit\n");
#endif
return 0;
}
static void
isdn_tty_close(struct tty_struct *tty, struct file *filp)
{
modem_info *info = (modem_info *) tty->driver_data;
ulong timeout;
if (!info || isdn_tty_paranoia_check(info, tty->name, "isdn_tty_close"))
return;
if (tty_hung_up_p(filp)) {
#ifdef ISDN_DEBUG_MODEM_OPEN
printk(KERN_DEBUG "isdn_tty_close return after tty_hung_up_p\n");
#endif
return;
}
if ((tty->count == 1) && (info->count != 1)) {
/*
* Uh, oh. tty->count is 1, which means that the tty
* structure will be freed. Info->count should always
* be one in these conditions. If it's greater than
* one, we've got real problems, since it means the
* serial port won't be shutdown.
*/
printk(KERN_ERR "isdn_tty_close: bad port count; tty->count is 1, "
"info->count is %d\n", info->count);
info->count = 1;
}
if (--info->count < 0) {
printk(KERN_ERR "isdn_tty_close: bad port count for ttyi%d: %d\n",
info->line, info->count);
info->count = 0;
}
if (info->count) {
#ifdef ISDN_DEBUG_MODEM_OPEN
printk(KERN_DEBUG "isdn_tty_close after info->count != 0\n");
#endif
module_put(info->owner);
return;
}
info->flags |= ISDN_ASYNC_CLOSING;
/*
* Save the termios structure, since this port may have
* separate termios for callout and dialin.
*/
if (info->flags & ISDN_ASYNC_NORMAL_ACTIVE)
info->normal_termios = *tty->termios;
if (info->flags & ISDN_ASYNC_CALLOUT_ACTIVE)
info->callout_termios = *tty->termios;
tty->closing = 1;
/*
* At this point we stop accepting input. To do this, we
* disable the receive line status interrupts, and tell the
* interrupt driver to stop checking the data ready bit in the
* line status register.
*/
if (info->flags & ISDN_ASYNC_INITIALIZED) {
tty_wait_until_sent(tty, 3000); /* 30 seconds timeout */
/*
* Before we drop DTR, make sure the UART transmitter
* has completely drained; this is especially
* important if there is a transmit FIFO!
*/
timeout = jiffies + HZ;
while (!(info->lsr & UART_LSR_TEMT)) {
schedule_timeout_interruptible(20);
if (time_after(jiffies,timeout))
break;
}
}
dev->modempoll--;
isdn_tty_shutdown(info);
isdn_tty_flush_buffer(tty);
tty_ldisc_flush(tty);
info->tty = NULL;
info->ncarrier = 0;
tty->closing = 0;
module_put(info->owner);
if (info->blocked_open) {
msleep_interruptible(500);
wake_up_interruptible(&info->open_wait);
}
info->flags &= ~(ISDN_ASYNC_NORMAL_ACTIVE | ISDN_ASYNC_CLOSING);
wake_up_interruptible(&info->close_wait);
#ifdef ISDN_DEBUG_MODEM_OPEN
printk(KERN_DEBUG "isdn_tty_close normal exit\n");
#endif
}
/*
* isdn_tty_hangup() --- called by tty_hangup() when a hangup is signaled.
*/
static void
isdn_tty_hangup(struct tty_struct *tty)
{
modem_info *info = (modem_info *) tty->driver_data;
if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_hangup"))
return;
isdn_tty_shutdown(info);
info->count = 0;
info->flags &= ~(ISDN_ASYNC_NORMAL_ACTIVE | ISDN_ASYNC_CALLOUT_ACTIVE);
info->tty = NULL;
wake_up_interruptible(&info->open_wait);
}
/* This routine initializes all emulator-data.
*/
static void
isdn_tty_reset_profile(atemu * m)
{
m->profile[0] = 0;
m->profile[1] = 0;
m->profile[2] = 43;
m->profile[3] = 13;
m->profile[4] = 10;
m->profile[5] = 8;
m->profile[6] = 3;
m->profile[7] = 60;
m->profile[8] = 2;
m->profile[9] = 6;
m->profile[10] = 7;
m->profile[11] = 70;
m->profile[12] = 0x45;
m->profile[13] = 4;
m->profile[14] = ISDN_PROTO_L2_X75I;
m->profile[15] = ISDN_PROTO_L3_TRANS;
m->profile[16] = ISDN_SERIAL_XMIT_SIZE / 16;
m->profile[17] = ISDN_MODEM_WINSIZE;
m->profile[18] = 4;
m->profile[19] = 0;
m->profile[20] = 0;
m->profile[23] = 0;
m->pmsn[0] = '\0';
m->plmsn[0] = '\0';
}
#ifdef CONFIG_ISDN_AUDIO
static void
isdn_tty_modem_reset_vpar(atemu * m)
{
m->vpar[0] = 2; /* Voice-device (2 = phone line) */
m->vpar[1] = 0; /* Silence detection level (0 = none ) */
m->vpar[2] = 70; /* Silence interval (7 sec. ) */
m->vpar[3] = 2; /* Compression type (1 = ADPCM-2 ) */
m->vpar[4] = 0; /* DTMF detection level (0 = softcode ) */
m->vpar[5] = 8; /* DTMF interval (8 * 5 ms. ) */
}
#endif
#ifdef CONFIG_ISDN_TTY_FAX
static void
isdn_tty_modem_reset_faxpar(modem_info * info)
{
T30_s *f = info->fax;
f->code = 0;
f->phase = ISDN_FAX_PHASE_IDLE;
f->direction = 0;
f->resolution = 1; /* fine */
f->rate = 5; /* 14400 bit/s */
f->width = 0;
f->length = 0;
f->compression = 0;
f->ecm = 0;
f->binary = 0;
f->scantime = 0;
memset(&f->id[0], 32, FAXIDLEN - 1);
f->id[FAXIDLEN - 1] = 0;
f->badlin = 0;
f->badmul = 0;
f->bor = 0;
f->nbc = 0;
f->cq = 0;
f->cr = 0;
f->ctcrty = 0;
f->minsp = 0;
f->phcto = 30;
f->rel = 0;
memset(&f->pollid[0], 32, FAXIDLEN - 1);
f->pollid[FAXIDLEN - 1] = 0;
}
#endif
static void
isdn_tty_modem_reset_regs(modem_info * info, int force)
{
atemu *m = &info->emu;
if ((m->mdmreg[REG_DTRR] & BIT_DTRR) || force) {
memcpy(m->mdmreg, m->profile, ISDN_MODEM_NUMREG);
memcpy(m->msn, m->pmsn, ISDN_MSNLEN);
memcpy(m->lmsn, m->plmsn, ISDN_LMSNLEN);
info->xmit_size = m->mdmreg[REG_PSIZE] * 16;
}
#ifdef CONFIG_ISDN_AUDIO
isdn_tty_modem_reset_vpar(m);
#endif
#ifdef CONFIG_ISDN_TTY_FAX
isdn_tty_modem_reset_faxpar(info);
#endif
m->mdmcmdl = 0;
}
static void
modem_write_profile(atemu * m)
{
memcpy(m->profile, m->mdmreg, ISDN_MODEM_NUMREG);
memcpy(m->pmsn, m->msn, ISDN_MSNLEN);
memcpy(m->plmsn, m->lmsn, ISDN_LMSNLEN);
if (dev->profd)
send_sig(SIGIO, dev->profd, 1);
}
static const struct tty_operations modem_ops = {
.open = isdn_tty_open,
.close = isdn_tty_close,
.write = isdn_tty_write,
.flush_chars = isdn_tty_flush_chars,
.write_room = isdn_tty_write_room,
.chars_in_buffer = isdn_tty_chars_in_buffer,
.flush_buffer = isdn_tty_flush_buffer,
.ioctl = isdn_tty_ioctl,
.throttle = isdn_tty_throttle,
.unthrottle = isdn_tty_unthrottle,
.set_termios = isdn_tty_set_termios,
.hangup = isdn_tty_hangup,
.tiocmget = isdn_tty_tiocmget,
.tiocmset = isdn_tty_tiocmset,
};
int
isdn_tty_modem_init(void)
{
isdn_modem_t *m;
int i, retval;
modem_info *info;
m = &dev->mdm;
m->tty_modem = alloc_tty_driver(ISDN_MAX_CHANNELS);
if (!m->tty_modem)
return -ENOMEM;
m->tty_modem->name = "ttyI";
m->tty_modem->major = ISDN_TTY_MAJOR;
m->tty_modem->minor_start = 0;
m->tty_modem->type = TTY_DRIVER_TYPE_SERIAL;
m->tty_modem->subtype = SERIAL_TYPE_NORMAL;
m->tty_modem->init_termios = tty_std_termios;
m->tty_modem->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL;
m->tty_modem->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
m->tty_modem->driver_name = "isdn_tty";
tty_set_operations(m->tty_modem, &modem_ops);
retval = tty_register_driver(m->tty_modem);
if (retval) {
printk(KERN_WARNING "isdn_tty: Couldn't register modem-device\n");
goto err;
}
for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
info = &m->info[i];
#ifdef CONFIG_ISDN_TTY_FAX
if (!(info->fax = kmalloc(sizeof(T30_s), GFP_KERNEL))) {
printk(KERN_ERR "Could not allocate fax t30-buffer\n");
retval = -ENOMEM;
goto err_unregister;
}
#endif
#ifdef MODULE
info->owner = THIS_MODULE;
#endif
spin_lock_init(&info->readlock);
sprintf(info->last_cause, "0000");
sprintf(info->last_num, "none");
info->last_dir = 0;
info->last_lhup = 1;
info->last_l2 = -1;
info->last_si = 0;
isdn_tty_reset_profile(&info->emu);
isdn_tty_modem_reset_regs(info, 1);
info->magic = ISDN_ASYNC_MAGIC;
info->line = i;
info->tty = NULL;
info->x_char = 0;
info->count = 0;
info->blocked_open = 0;
init_waitqueue_head(&info->open_wait);
init_waitqueue_head(&info->close_wait);
info->isdn_driver = -1;
info->isdn_channel = -1;
info->drv_index = -1;
info->xmit_size = ISDN_SERIAL_XMIT_SIZE;
init_timer(&info->nc_timer);
info->nc_timer.function = isdn_tty_modem_do_ncarrier;
info->nc_timer.data = (unsigned long) info;
skb_queue_head_init(&info->xmit_queue);
#ifdef CONFIG_ISDN_AUDIO
skb_queue_head_init(&info->dtmf_queue);
#endif
if (!(info->xmit_buf = kmalloc(ISDN_SERIAL_XMIT_MAX + 5, GFP_KERNEL))) {
printk(KERN_ERR "Could not allocate modem xmit-buffer\n");
retval = -ENOMEM;
goto err_unregister;
}
/* Make room for T.70 header */
info->xmit_buf += 4;
}
return 0;
err_unregister:
for (i--; i >= 0; i--) {
info = &m->info[i];
#ifdef CONFIG_ISDN_TTY_FAX
kfree(info->fax);
#endif
kfree(info->xmit_buf - 4);
}
tty_unregister_driver(m->tty_modem);
err:
put_tty_driver(m->tty_modem);
m->tty_modem = NULL;
return retval;
}
void
isdn_tty_exit(void)
{
modem_info *info;
int i;
for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
info = &dev->mdm.info[i];
isdn_tty_cleanup_xmit(info);
#ifdef CONFIG_ISDN_TTY_FAX
kfree(info->fax);
#endif
kfree(info->xmit_buf - 4);
}
tty_unregister_driver(dev->mdm.tty_modem);
put_tty_driver(dev->mdm.tty_modem);
dev->mdm.tty_modem = NULL;
}
/*
* isdn_tty_match_icall(char *MSN, atemu *tty_emulator, int dev_idx)
* match the MSN against the MSNs (glob patterns) defined for tty_emulator,
* and return 0 for match, 1 for no match, 2 if MSN could match if longer.
*/
static int
isdn_tty_match_icall(char *cid, atemu *emu, int di)
{
#ifdef ISDN_DEBUG_MODEM_ICALL
printk(KERN_DEBUG "m_fi: msn=%s lmsn=%s mmsn=%s mreg[SI1]=%d mreg[SI2]=%d\n",
emu->msn, emu->lmsn, isdn_map_eaz2msn(emu->msn, di),
emu->mdmreg[REG_SI1], emu->mdmreg[REG_SI2]);
#endif
if (strlen(emu->lmsn)) {
char *p = emu->lmsn;
char *q;
int tmp;
int ret = 0;
while (1) {
if ((q = strchr(p, ';')))
*q = '\0';
if ((tmp = isdn_msncmp(cid, isdn_map_eaz2msn(p, di))) > ret)
ret = tmp;
#ifdef ISDN_DEBUG_MODEM_ICALL
printk(KERN_DEBUG "m_fi: lmsnX=%s mmsn=%s -> tmp=%d\n",
p, isdn_map_eaz2msn(emu->msn, di), tmp);
#endif
if (q) {
*q = ';';
p = q;
p++;
}
if (!tmp)
return 0;
if (!q)
break;
}
return ret;
} else {
int tmp;
tmp = isdn_msncmp(cid, isdn_map_eaz2msn(emu->msn, di));
#ifdef ISDN_DEBUG_MODEM_ICALL
printk(KERN_DEBUG "m_fi: mmsn=%s -> tmp=%d\n",
isdn_map_eaz2msn(emu->msn, di), tmp);
#endif
return tmp;
}
}
/*
* An incoming call-request has arrived.
* Search the tty-devices for an appropriate device and bind
* it to the ISDN-Channel.
* Return:
*
* 0 = No matching device found.
* 1 = A matching device found.
* 3 = No match found, but eventually would match, if
* CID is longer.
*/
int
isdn_tty_find_icall(int di, int ch, setup_parm *setup)
{
char *eaz;
int i;
int wret;
int idx;
int si1;
int si2;
char *nr;
ulong flags;
if (!setup->phone[0]) {
nr = "0";
printk(KERN_INFO "isdn_tty: Incoming call without OAD, assuming '0'\n");
} else
nr = setup->phone;
si1 = (int) setup->si1;
si2 = (int) setup->si2;
if (!setup->eazmsn[0]) {
printk(KERN_WARNING "isdn_tty: Incoming call without CPN, assuming '0'\n");
eaz = "0";
} else
eaz = setup->eazmsn;
#ifdef ISDN_DEBUG_MODEM_ICALL
printk(KERN_DEBUG "m_fi: eaz=%s si1=%d si2=%d\n", eaz, si1, si2);
#endif
wret = 0;
spin_lock_irqsave(&dev->lock, flags);
for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
modem_info *info = &dev->mdm.info[i];
if (info->count == 0)
continue;
if ((info->emu.mdmreg[REG_SI1] & si2bit[si1]) && /* SI1 is matching */
(info->emu.mdmreg[REG_SI2] == si2)) { /* SI2 is matching */
idx = isdn_dc2minor(di, ch);
#ifdef ISDN_DEBUG_MODEM_ICALL
printk(KERN_DEBUG "m_fi: match1 wret=%d\n", wret);
printk(KERN_DEBUG "m_fi: idx=%d flags=%08lx drv=%d ch=%d usg=%d\n", idx,
info->flags, info->isdn_driver, info->isdn_channel,
dev->usage[idx]);
#endif
if (
#ifndef FIX_FILE_TRANSFER
(info->flags & ISDN_ASYNC_NORMAL_ACTIVE) &&
#endif
(info->isdn_driver == -1) &&
(info->isdn_channel == -1) &&
(USG_NONE(dev->usage[idx]))) {
int matchret;
if ((matchret = isdn_tty_match_icall(eaz, &info->emu, di)) > wret)
wret = matchret;
if (!matchret) { /* EAZ is matching */
info->isdn_driver = di;
info->isdn_channel = ch;
info->drv_index = idx;
dev->m_idx[idx] = info->line;
dev->usage[idx] &= ISDN_USAGE_EXCLUSIVE;
dev->usage[idx] |= isdn_calc_usage(si1, info->emu.mdmreg[REG_L2PROT]);
strcpy(dev->num[idx], nr);
strcpy(info->emu.cpn, eaz);
info->emu.mdmreg[REG_SI1I] = si2bit[si1];
info->emu.mdmreg[REG_PLAN] = setup->plan;
info->emu.mdmreg[REG_SCREEN] = setup->screen;
isdn_info_update();
spin_unlock_irqrestore(&dev->lock, flags);
printk(KERN_INFO "isdn_tty: call from %s, -> RING on ttyI%d\n", nr,
info->line);
info->msr |= UART_MSR_RI;
isdn_tty_modem_result(RESULT_RING, info);
isdn_timer_ctrl(ISDN_TIMER_MODEMRING, 1);
return 1;
}
}
}
}
spin_unlock_irqrestore(&dev->lock, flags);
printk(KERN_INFO "isdn_tty: call from %s -> %s %s\n", nr, eaz,
((dev->drv[di]->flags & DRV_FLAG_REJBUS) && (wret != 2))? "rejected" : "ignored");
return (wret == 2)?3:0;
}
#define TTY_IS_ACTIVE(info) \
(info->flags & (ISDN_ASYNC_NORMAL_ACTIVE | ISDN_ASYNC_CALLOUT_ACTIVE))
int
isdn_tty_stat_callback(int i, isdn_ctrl *c)
{
int mi;
modem_info *info;
char *e;
if (i < 0)
return 0;
if ((mi = dev->m_idx[i]) >= 0) {
info = &dev->mdm.info[mi];
switch (c->command) {
case ISDN_STAT_CINF:
printk(KERN_DEBUG "CHARGEINFO on ttyI%d: %ld %s\n", info->line, c->arg, c->parm.num);
info->emu.charge = (unsigned) simple_strtoul(c->parm.num, &e, 10);
if (e == (char *)c->parm.num)
info->emu.charge = 0;
break;
case ISDN_STAT_BSENT:
#ifdef ISDN_TTY_STAT_DEBUG
printk(KERN_DEBUG "tty_STAT_BSENT ttyI%d\n", info->line);
#endif
if ((info->isdn_driver == c->driver) &&
(info->isdn_channel == c->arg)) {
info->msr |= UART_MSR_CTS;
if (info->send_outstanding)
if (!(--info->send_outstanding))
info->lsr |= UART_LSR_TEMT;
isdn_tty_tint(info);
return 1;
}
break;
case ISDN_STAT_CAUSE:
#ifdef ISDN_TTY_STAT_DEBUG
printk(KERN_DEBUG "tty_STAT_CAUSE ttyI%d\n", info->line);
#endif
/* Signal cause to tty-device */
strncpy(info->last_cause, c->parm.num, 5);
return 1;
case ISDN_STAT_DISPLAY:
#ifdef ISDN_TTY_STAT_DEBUG
printk(KERN_DEBUG "tty_STAT_DISPLAY ttyI%d\n", info->line);
#endif
/* Signal display to tty-device */
if ((info->emu.mdmreg[REG_DISPLAY] & BIT_DISPLAY) &&
!(info->emu.mdmreg[REG_RESPNUM] & BIT_RESPNUM)) {
isdn_tty_at_cout("\r\n", info);
isdn_tty_at_cout("DISPLAY: ", info);
isdn_tty_at_cout(c->parm.display, info);
isdn_tty_at_cout("\r\n", info);
}
return 1;
case ISDN_STAT_DCONN:
#ifdef ISDN_TTY_STAT_DEBUG
printk(KERN_DEBUG "tty_STAT_DCONN ttyI%d\n", info->line);
#endif
if (TTY_IS_ACTIVE(info)) {
if (info->dialing == 1) {
info->dialing = 2;
return 1;
}
}
break;
case ISDN_STAT_DHUP:
#ifdef ISDN_TTY_STAT_DEBUG
printk(KERN_DEBUG "tty_STAT_DHUP ttyI%d\n", info->line);
#endif
if (TTY_IS_ACTIVE(info)) {
if (info->dialing == 1)
isdn_tty_modem_result(RESULT_BUSY, info);
if (info->dialing > 1)
isdn_tty_modem_result(RESULT_NO_CARRIER, info);
info->dialing = 0;
#ifdef ISDN_DEBUG_MODEM_HUP
printk(KERN_DEBUG "Mhup in ISDN_STAT_DHUP\n");
#endif
isdn_tty_modem_hup(info, 0);
return 1;
}
break;
case ISDN_STAT_BCONN:
#ifdef ISDN_TTY_STAT_DEBUG
printk(KERN_DEBUG "tty_STAT_BCONN ttyI%d\n", info->line);
#endif
/* Wake up any processes waiting
* for incoming call of this device when
* DCD follow the state of incoming carrier
*/
if (info->blocked_open &&
(info->emu.mdmreg[REG_DCD] & BIT_DCD)) {
wake_up_interruptible(&info->open_wait);
}
/* Schedule CONNECT-Message to any tty
* waiting for it and
* set DCD-bit of its modem-status.
*/
if (TTY_IS_ACTIVE(info) ||
(info->blocked_open && (info->emu.mdmreg[REG_DCD] & BIT_DCD))) {
info->msr |= UART_MSR_DCD;
info->emu.charge = 0;
if (info->dialing & 0xf)
info->last_dir = 1;
else
info->last_dir = 0;
info->dialing = 0;
info->rcvsched = 1;
if (USG_MODEM(dev->usage[i])) {
if (info->emu.mdmreg[REG_L2PROT] == ISDN_PROTO_L2_MODEM) {
strcpy(info->emu.connmsg, c->parm.num);
isdn_tty_modem_result(RESULT_CONNECT, info);
} else
isdn_tty_modem_result(RESULT_CONNECT64000, info);
}
if (USG_VOICE(dev->usage[i]))
isdn_tty_modem_result(RESULT_VCON, info);
return 1;
}
break;
case ISDN_STAT_BHUP:
#ifdef ISDN_TTY_STAT_DEBUG
printk(KERN_DEBUG "tty_STAT_BHUP ttyI%d\n", info->line);
#endif
if (TTY_IS_ACTIVE(info)) {
#ifdef ISDN_DEBUG_MODEM_HUP
printk(KERN_DEBUG "Mhup in ISDN_STAT_BHUP\n");
#endif
isdn_tty_modem_hup(info, 0);
return 1;
}
break;
case ISDN_STAT_NODCH:
#ifdef ISDN_TTY_STAT_DEBUG
printk(KERN_DEBUG "tty_STAT_NODCH ttyI%d\n", info->line);
#endif
if (TTY_IS_ACTIVE(info)) {
if (info->dialing) {
info->dialing = 0;
info->last_l2 = -1;
info->last_si = 0;
sprintf(info->last_cause, "0000");
isdn_tty_modem_result(RESULT_NO_DIALTONE, info);
}
isdn_tty_modem_hup(info, 0);
return 1;
}
break;
case ISDN_STAT_UNLOAD:
#ifdef ISDN_TTY_STAT_DEBUG
printk(KERN_DEBUG "tty_STAT_UNLOAD ttyI%d\n", info->line);
#endif
for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
info = &dev->mdm.info[i];
if (info->isdn_driver == c->driver) {
if (info->online)
isdn_tty_modem_hup(info, 1);
}
}
return 1;
#ifdef CONFIG_ISDN_TTY_FAX
case ISDN_STAT_FAXIND:
if (TTY_IS_ACTIVE(info)) {
isdn_tty_fax_command(info, c);
}
break;
#endif
#ifdef CONFIG_ISDN_AUDIO
case ISDN_STAT_AUDIO:
if (TTY_IS_ACTIVE(info)) {
switch(c->parm.num[0]) {
case ISDN_AUDIO_DTMF:
if (info->vonline) {
isdn_audio_put_dle_code(info,
c->parm.num[1]);
}
break;
}
}
break;
#endif
}
}
return 0;
}
/*********************************************************************
Modem-Emulator-Routines
*********************************************************************/
#define cmdchar(c) ((c>=' ')&&(c<=0x7f))
/*
* Put a message from the AT-emulator into receive-buffer of tty,
* convert CR, LF, and BS to values in modem-registers 3, 4 and 5.
*/
void
isdn_tty_at_cout(char *msg, modem_info * info)
{
struct tty_struct *tty;
atemu *m = &info->emu;
char *p;
char c;
u_long flags;
struct sk_buff *skb = NULL;
char *sp = NULL;
int l;
if (!msg) {
printk(KERN_WARNING "isdn_tty: Null-Message in isdn_tty_at_cout\n");
return;
}
l = strlen(msg);
spin_lock_irqsave(&info->readlock, flags);
tty = info->tty;
if ((info->flags & ISDN_ASYNC_CLOSING) || (!tty)) {
spin_unlock_irqrestore(&info->readlock, flags);
return;
}
/* use queue instead of direct, if online and */
/* data is in queue or buffer is full */
if (info->online && ((tty_buffer_request_room(tty, l) < l) ||
!skb_queue_empty(&dev->drv[info->isdn_driver]->rpqueue[info->isdn_channel]))) {
skb = alloc_skb(l, GFP_ATOMIC);
if (!skb) {
spin_unlock_irqrestore(&info->readlock, flags);
return;
}
sp = skb_put(skb, l);
#ifdef CONFIG_ISDN_AUDIO
ISDN_AUDIO_SKB_DLECOUNT(skb) = 0;
ISDN_AUDIO_SKB_LOCK(skb) = 0;
#endif
}
for (p = msg; *p; p++) {
switch (*p) {
case '\r':
c = m->mdmreg[REG_CR];
break;
case '\n':
c = m->mdmreg[REG_LF];
break;
case '\b':
c = m->mdmreg[REG_BS];
break;
default:
c = *p;
}
if (skb) {
*sp++ = c;
} else {
if(tty_insert_flip_char(tty, c, TTY_NORMAL) == 0)
break;
}
}
if (skb) {
__skb_queue_tail(&dev->drv[info->isdn_driver]->rpqueue[info->isdn_channel], skb);
dev->drv[info->isdn_driver]->rcvcount[info->isdn_channel] += skb->len;
spin_unlock_irqrestore(&info->readlock, flags);
/* Schedule dequeuing */
if (dev->modempoll && info->rcvsched)
isdn_timer_ctrl(ISDN_TIMER_MODEMREAD, 1);
} else {
spin_unlock_irqrestore(&info->readlock, flags);
tty_flip_buffer_push(tty);
}
}
/*
* Perform ATH Hangup
*/
static void
isdn_tty_on_hook(modem_info * info)
{
if (info->isdn_channel >= 0) {
#ifdef ISDN_DEBUG_MODEM_HUP
printk(KERN_DEBUG "Mhup in isdn_tty_on_hook\n");
#endif
isdn_tty_modem_hup(info, 1);
}
}
static void
isdn_tty_off_hook(void)
{
printk(KERN_DEBUG "isdn_tty_off_hook\n");
}
#define PLUSWAIT1 (HZ/2) /* 0.5 sec. */
#define PLUSWAIT2 (HZ*3/2) /* 1.5 sec */
/*
* Check Buffer for Modem-escape-sequence, activate timer-callback to
* isdn_tty_modem_escape() if sequence found.
*
* Parameters:
* p pointer to databuffer
* plus escape-character
* count length of buffer
* pluscount count of valid escape-characters so far
* lastplus timestamp of last character
*/
static void
isdn_tty_check_esc(const u_char * p, u_char plus, int count, int *pluscount,
u_long *lastplus)
{
if (plus > 127)
return;
if (count > 3) {
p += count - 3;
count = 3;
*pluscount = 0;
}
while (count > 0) {
if (*(p++) == plus) {
if ((*pluscount)++) {
/* Time since last '+' > 0.5 sec. ? */
if (time_after(jiffies, *lastplus + PLUSWAIT1))
*pluscount = 1;
} else {
/* Time since last non-'+' < 1.5 sec. ? */
if (time_before(jiffies, *lastplus + PLUSWAIT2))
*pluscount = 0;
}
if ((*pluscount == 3) && (count == 1))
isdn_timer_ctrl(ISDN_TIMER_MODEMPLUS, 1);
if (*pluscount > 3)
*pluscount = 1;
} else
*pluscount = 0;
*lastplus = jiffies;
count--;
}
}
/*
* Return result of AT-emulator to tty-receive-buffer, depending on
* modem-register 12, bit 0 and 1.
* For CONNECT-messages also switch to online-mode.
* For RING-message handle auto-ATA if register 0 != 0
*/
static void
isdn_tty_modem_result(int code, modem_info * info)
{
atemu *m = &info->emu;
static char *msg[] =
{"OK", "CONNECT", "RING", "NO CARRIER", "ERROR",
"CONNECT 64000", "NO DIALTONE", "BUSY", "NO ANSWER",
"RINGING", "NO MSN/EAZ", "VCON", "RUNG"};
char s[ISDN_MSNLEN+10];
switch (code) {
case RESULT_RING:
m->mdmreg[REG_RINGCNT]++;
if (m->mdmreg[REG_RINGCNT] == m->mdmreg[REG_RINGATA])
/* Automatically accept incoming call */
isdn_tty_cmd_ATA(info);
break;
case RESULT_NO_CARRIER:
#ifdef ISDN_DEBUG_MODEM_HUP
printk(KERN_DEBUG "modem_result: NO CARRIER %d %d\n",
(info->flags & ISDN_ASYNC_CLOSING),
(!info->tty));
#endif
m->mdmreg[REG_RINGCNT] = 0;
del_timer(&info->nc_timer);
info->ncarrier = 0;
if ((info->flags & ISDN_ASYNC_CLOSING) || (!info->tty)) {
return;
}
#ifdef CONFIG_ISDN_AUDIO
if (info->vonline & 1) {
#ifdef ISDN_DEBUG_MODEM_VOICE
printk(KERN_DEBUG "res3: send DLE-ETX on ttyI%d\n",
info->line);
#endif
/* voice-recording, add DLE-ETX */
isdn_tty_at_cout("\020\003", info);
}
if (info->vonline & 2) {
#ifdef ISDN_DEBUG_MODEM_VOICE
printk(KERN_DEBUG "res3: send DLE-DC4 on ttyI%d\n",
info->line);
#endif
/* voice-playing, add DLE-DC4 */
isdn_tty_at_cout("\020\024", info);
}
#endif
break;
case RESULT_CONNECT:
case RESULT_CONNECT64000:
sprintf(info->last_cause, "0000");
if (!info->online)
info->online = 2;
break;
case RESULT_VCON:
#ifdef ISDN_DEBUG_MODEM_VOICE
printk(KERN_DEBUG "res3: send VCON on ttyI%d\n",
info->line);
#endif
sprintf(info->last_cause, "0000");
if (!info->online)
info->online = 1;
break;
} /* switch(code) */
if (m->mdmreg[REG_RESP] & BIT_RESP) {
/* Show results */
if (m->mdmreg[REG_RESPNUM] & BIT_RESPNUM) {
/* Show numeric results only */
sprintf(s, "\r\n%d\r\n", code);
isdn_tty_at_cout(s, info);
} else {
if (code == RESULT_RING) {
/* return if "show RUNG" and ringcounter>1 */
if ((m->mdmreg[REG_RUNG] & BIT_RUNG) &&
(m->mdmreg[REG_RINGCNT] > 1))
return;
/* print CID, _before_ _every_ ring */
if (!(m->mdmreg[REG_CIDONCE] & BIT_CIDONCE)) {
isdn_tty_at_cout("\r\nCALLER NUMBER: ", info);
isdn_tty_at_cout(dev->num[info->drv_index], info);
if (m->mdmreg[REG_CDN] & BIT_CDN) {
isdn_tty_at_cout("\r\nCALLED NUMBER: ", info);
isdn_tty_at_cout(info->emu.cpn, info);
}
}
}
isdn_tty_at_cout("\r\n", info);
isdn_tty_at_cout(msg[code], info);
switch (code) {
case RESULT_CONNECT:
switch (m->mdmreg[REG_L2PROT]) {
case ISDN_PROTO_L2_MODEM:
isdn_tty_at_cout(" ", info);
isdn_tty_at_cout(m->connmsg, info);
break;
}
break;
case RESULT_RING:
/* Append CPN, if enabled */
if ((m->mdmreg[REG_CPN] & BIT_CPN)) {
sprintf(s, "/%s", m->cpn);
isdn_tty_at_cout(s, info);
}
/* Print CID only once, _after_ 1st RING */
if ((m->mdmreg[REG_CIDONCE] & BIT_CIDONCE) &&
(m->mdmreg[REG_RINGCNT] == 1)) {
isdn_tty_at_cout("\r\n", info);
isdn_tty_at_cout("CALLER NUMBER: ", info);
isdn_tty_at_cout(dev->num[info->drv_index], info);
if (m->mdmreg[REG_CDN] & BIT_CDN) {
isdn_tty_at_cout("\r\nCALLED NUMBER: ", info);
isdn_tty_at_cout(info->emu.cpn, info);
}
}
break;
case RESULT_NO_CARRIER:
case RESULT_NO_DIALTONE:
case RESULT_BUSY:
case RESULT_NO_ANSWER:
m->mdmreg[REG_RINGCNT] = 0;
/* Append Cause-Message if enabled */
if (m->mdmreg[REG_RESPXT] & BIT_RESPXT) {
sprintf(s, "/%s", info->last_cause);
isdn_tty_at_cout(s, info);
}
break;
case RESULT_CONNECT64000:
/* Append Protocol to CONNECT message */
switch (m->mdmreg[REG_L2PROT]) {
case ISDN_PROTO_L2_X75I:
case ISDN_PROTO_L2_X75UI:
case ISDN_PROTO_L2_X75BUI:
isdn_tty_at_cout("/X.75", info);
break;
case ISDN_PROTO_L2_HDLC:
isdn_tty_at_cout("/HDLC", info);
break;
case ISDN_PROTO_L2_V11096:
isdn_tty_at_cout("/V110/9600", info);
break;
case ISDN_PROTO_L2_V11019:
isdn_tty_at_cout("/V110/19200", info);
break;
case ISDN_PROTO_L2_V11038:
isdn_tty_at_cout("/V110/38400", info);
break;
}
if (m->mdmreg[REG_T70] & BIT_T70) {
isdn_tty_at_cout("/T.70", info);
if (m->mdmreg[REG_T70] & BIT_T70_EXT)
isdn_tty_at_cout("+", info);
}
break;
}
isdn_tty_at_cout("\r\n", info);
}
}
if (code == RESULT_NO_CARRIER) {
if ((info->flags & ISDN_ASYNC_CLOSING) || (!info->tty)) {
return;
}
#ifdef CONFIG_ISDN_AUDIO
if ( !info->vonline )
tty_ldisc_flush(info->tty);
#else
tty_ldisc_flush(info->tty);
#endif
if ((info->flags & ISDN_ASYNC_CHECK_CD) &&
(!((info->flags & ISDN_ASYNC_CALLOUT_ACTIVE) &&
(info->flags & ISDN_ASYNC_CALLOUT_NOHUP)))) {
tty_hangup(info->tty);
}
}
}
/*
* Display a modem-register-value.
*/
static void
isdn_tty_show_profile(int ridx, modem_info * info)
{
char v[6];
sprintf(v, "\r\n%d", info->emu.mdmreg[ridx]);
isdn_tty_at_cout(v, info);
}
/*
* Get MSN-string from char-pointer, set pointer to end of number
*/
static void
isdn_tty_get_msnstr(char *n, char **p)
{
int limit = ISDN_MSNLEN - 1;
while (((*p[0] >= '0' && *p[0] <= '9') ||
/* Why a comma ??? */
(*p[0] == ',') || (*p[0] == ':')) &&
(limit--))
*n++ = *p[0]++;
*n = '\0';
}
/*
* Get phone-number from modem-commandbuffer
*/
static void
isdn_tty_getdial(char *p, char *q,int cnt)
{
int first = 1;
int limit = ISDN_MSNLEN - 1; /* MUST match the size of interface var to avoid
buffer overflow */
while (strchr(" 0123456789,#.*WPTSR-", *p) && *p && --cnt>0) {
if ((*p >= '0' && *p <= '9') || ((*p == 'S') && first) ||
((*p == 'R') && first) ||
(*p == '*') || (*p == '#')) {
*q++ = *p;
limit--;
}
if(!limit)
break;
p++;
first = 0;
}
*q = 0;
}
#define PARSE_ERROR { isdn_tty_modem_result(RESULT_ERROR, info); return; }
#define PARSE_ERROR1 { isdn_tty_modem_result(RESULT_ERROR, info); return 1; }
static void
isdn_tty_report(modem_info * info)
{
atemu *m = &info->emu;
char s[80];
isdn_tty_at_cout("\r\nStatistics of last connection:\r\n\r\n", info);
sprintf(s, " Remote Number: %s\r\n", info->last_num);
isdn_tty_at_cout(s, info);
sprintf(s, " Direction: %s\r\n", info->last_dir ? "outgoing" : "incoming");
isdn_tty_at_cout(s, info);
isdn_tty_at_cout(" Layer-2 Protocol: ", info);
switch (info->last_l2) {
case ISDN_PROTO_L2_X75I:
isdn_tty_at_cout("X.75i", info);
break;
case ISDN_PROTO_L2_X75UI:
isdn_tty_at_cout("X.75ui", info);
break;
case ISDN_PROTO_L2_X75BUI:
isdn_tty_at_cout("X.75bui", info);
break;
case ISDN_PROTO_L2_HDLC:
isdn_tty_at_cout("HDLC", info);
break;
case ISDN_PROTO_L2_V11096:
isdn_tty_at_cout("V.110 9600 Baud", info);
break;
case ISDN_PROTO_L2_V11019:
isdn_tty_at_cout("V.110 19200 Baud", info);
break;
case ISDN_PROTO_L2_V11038:
isdn_tty_at_cout("V.110 38400 Baud", info);
break;
case ISDN_PROTO_L2_TRANS:
isdn_tty_at_cout("transparent", info);
break;
case ISDN_PROTO_L2_MODEM:
isdn_tty_at_cout("modem", info);
break;
case ISDN_PROTO_L2_FAX:
isdn_tty_at_cout("fax", info);
break;
default:
isdn_tty_at_cout("unknown", info);
break;
}
if (m->mdmreg[REG_T70] & BIT_T70) {
isdn_tty_at_cout("/T.70", info);
if (m->mdmreg[REG_T70] & BIT_T70_EXT)
isdn_tty_at_cout("+", info);
}
isdn_tty_at_cout("\r\n", info);
isdn_tty_at_cout(" Service: ", info);
switch (info->last_si) {
case 1:
isdn_tty_at_cout("audio\r\n", info);
break;
case 5:
isdn_tty_at_cout("btx\r\n", info);
break;
case 7:
isdn_tty_at_cout("data\r\n", info);
break;
default:
sprintf(s, "%d\r\n", info->last_si);
isdn_tty_at_cout(s, info);
break;
}
sprintf(s, " Hangup location: %s\r\n", info->last_lhup ? "local" : "remote");
isdn_tty_at_cout(s, info);
sprintf(s, " Last cause: %s\r\n", info->last_cause);
isdn_tty_at_cout(s, info);
}
/*
* Parse AT&.. commands.
*/
static int
isdn_tty_cmd_ATand(char **p, modem_info * info)
{
atemu *m = &info->emu;
int i;
char rb[100];
#define MAXRB (sizeof(rb) - 1)
switch (*p[0]) {
case 'B':
/* &B - Set Buffersize */
p[0]++;
i = isdn_getnum(p);
if ((i < 0) || (i > ISDN_SERIAL_XMIT_MAX))
PARSE_ERROR1;
#ifdef CONFIG_ISDN_AUDIO
if ((m->mdmreg[REG_SI1] & 1) && (i > VBUF))
PARSE_ERROR1;
#endif
m->mdmreg[REG_PSIZE] = i / 16;
info->xmit_size = m->mdmreg[REG_PSIZE] * 16;
switch (m->mdmreg[REG_L2PROT]) {
case ISDN_PROTO_L2_V11096:
case ISDN_PROTO_L2_V11019:
case ISDN_PROTO_L2_V11038:
info->xmit_size /= 10;
}
break;
case 'C':
/* &C - DCD Status */
p[0]++;
switch (isdn_getnum(p)) {
case 0:
m->mdmreg[REG_DCD] &= ~BIT_DCD;
break;
case 1:
m->mdmreg[REG_DCD] |= BIT_DCD;
break;
default:
PARSE_ERROR1
}
break;
case 'D':
/* &D - Set DTR-Low-behavior */
p[0]++;
switch (isdn_getnum(p)) {
case 0:
m->mdmreg[REG_DTRHUP] &= ~BIT_DTRHUP;
m->mdmreg[REG_DTRR] &= ~BIT_DTRR;
break;
case 2:
m->mdmreg[REG_DTRHUP] |= BIT_DTRHUP;
m->mdmreg[REG_DTRR] &= ~BIT_DTRR;
break;
case 3:
m->mdmreg[REG_DTRHUP] |= BIT_DTRHUP;
m->mdmreg[REG_DTRR] |= BIT_DTRR;
break;
default:
PARSE_ERROR1
}
break;
case 'E':
/* &E -Set EAZ/MSN */
p[0]++;
isdn_tty_get_msnstr(m->msn, p);
break;
case 'F':
/* &F -Set Factory-Defaults */
p[0]++;
if (info->msr & UART_MSR_DCD)
PARSE_ERROR1;
isdn_tty_reset_profile(m);
isdn_tty_modem_reset_regs(info, 1);
break;
#ifdef DUMMY_HAYES_AT
case 'K':
/* only for be compilant with common scripts */
/* &K Flowcontrol - no function */
p[0]++;
isdn_getnum(p);
break;
#endif
case 'L':
/* &L -Set Numbers to listen on */
p[0]++;
i = 0;
while (*p[0] && (strchr("0123456789,-*[]?;", *p[0])) &&
(i < ISDN_LMSNLEN - 1))
m->lmsn[i++] = *p[0]++;
m->lmsn[i] = '\0';
break;
case 'R':
/* &R - Set V.110 bitrate adaption */
p[0]++;
i = isdn_getnum(p);
switch (i) {
case 0:
/* Switch off V.110, back to X.75 */
m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_X75I;
m->mdmreg[REG_SI2] = 0;
info->xmit_size = m->mdmreg[REG_PSIZE] * 16;
break;
case 9600:
m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_V11096;
m->mdmreg[REG_SI2] = 197;
info->xmit_size = m->mdmreg[REG_PSIZE] * 16 / 10;
break;
case 19200:
m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_V11019;
m->mdmreg[REG_SI2] = 199;
info->xmit_size = m->mdmreg[REG_PSIZE] * 16 / 10;
break;
case 38400:
m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_V11038;
m->mdmreg[REG_SI2] = 198; /* no existing standard for this */
info->xmit_size = m->mdmreg[REG_PSIZE] * 16 / 10;
break;
default:
PARSE_ERROR1;
}
/* Switch off T.70 */
m->mdmreg[REG_T70] &= ~(BIT_T70 | BIT_T70_EXT);
/* Set Service 7 */
m->mdmreg[REG_SI1] |= 4;
break;
case 'S':
/* &S - Set Windowsize */
p[0]++;
i = isdn_getnum(p);
if ((i > 0) && (i < 9))
m->mdmreg[REG_WSIZE] = i;
else
PARSE_ERROR1;
break;
case 'V':
/* &V - Show registers */
p[0]++;
isdn_tty_at_cout("\r\n", info);
for (i = 0; i < ISDN_MODEM_NUMREG; i++) {
sprintf(rb, "S%02d=%03d%s", i,
m->mdmreg[i], ((i + 1) % 10) ? " " : "\r\n");
isdn_tty_at_cout(rb, info);
}
sprintf(rb, "\r\nEAZ/MSN: %.50s\r\n",
strlen(m->msn) ? m->msn : "None");
isdn_tty_at_cout(rb, info);
if (strlen(m->lmsn)) {
isdn_tty_at_cout("\r\nListen: ", info);
isdn_tty_at_cout(m->lmsn, info);
isdn_tty_at_cout("\r\n", info);
}
break;
case 'W':
/* &W - Write Profile */
p[0]++;
switch (*p[0]) {
case '0':
p[0]++;
modem_write_profile(m);
break;
default:
PARSE_ERROR1;
}
break;
case 'X':
/* &X - Switch to BTX-Mode and T.70 */
p[0]++;
switch (isdn_getnum(p)) {
case 0:
m->mdmreg[REG_T70] &= ~(BIT_T70 | BIT_T70_EXT);
info->xmit_size = m->mdmreg[REG_PSIZE] * 16;
break;
case 1:
m->mdmreg[REG_T70] |= BIT_T70;
m->mdmreg[REG_T70] &= ~BIT_T70_EXT;
m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_X75I;
info->xmit_size = 112;
m->mdmreg[REG_SI1] = 4;
m->mdmreg[REG_SI2] = 0;
break;
case 2:
m->mdmreg[REG_T70] |= (BIT_T70 | BIT_T70_EXT);
m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_X75I;
info->xmit_size = 112;
m->mdmreg[REG_SI1] = 4;
m->mdmreg[REG_SI2] = 0;
break;
default:
PARSE_ERROR1;
}
break;
default:
PARSE_ERROR1;
}
return 0;
}
static int
isdn_tty_check_ats(int mreg, int mval, modem_info * info, atemu * m)
{
/* Some plausibility checks */
switch (mreg) {
case REG_L2PROT:
if (mval > ISDN_PROTO_L2_MAX)
return 1;
break;
case REG_PSIZE:
if ((mval * 16) > ISDN_SERIAL_XMIT_MAX)
return 1;
#ifdef CONFIG_ISDN_AUDIO
if ((m->mdmreg[REG_SI1] & 1) && (mval > VBUFX))
return 1;
#endif
info->xmit_size = mval * 16;
switch (m->mdmreg[REG_L2PROT]) {
case ISDN_PROTO_L2_V11096:
case ISDN_PROTO_L2_V11019:
case ISDN_PROTO_L2_V11038:
info->xmit_size /= 10;
}
break;
case REG_SI1I:
case REG_PLAN:
case REG_SCREEN:
/* readonly registers */
return 1;
}
return 0;
}
/*
* Perform ATS command
*/
static int
isdn_tty_cmd_ATS(char **p, modem_info * info)
{
atemu *m = &info->emu;
int bitpos;
int mreg;
int mval;
int bval;
mreg = isdn_getnum(p);
if (mreg < 0 || mreg >= ISDN_MODEM_NUMREG)
PARSE_ERROR1;
switch (*p[0]) {
case '=':
p[0]++;
mval = isdn_getnum(p);
if (mval < 0 || mval > 255)
PARSE_ERROR1;
if (isdn_tty_check_ats(mreg, mval, info, m))
PARSE_ERROR1;
m->mdmreg[mreg] = mval;
break;
case '.':
/* Set/Clear a single bit */
p[0]++;
bitpos = isdn_getnum(p);
if ((bitpos < 0) || (bitpos > 7))
PARSE_ERROR1;
switch (*p[0]) {
case '=':
p[0]++;
bval = isdn_getnum(p);
if (bval < 0 || bval > 1)
PARSE_ERROR1;
if (bval)
mval = m->mdmreg[mreg] | (1 << bitpos);
else
mval = m->mdmreg[mreg] & ~(1 << bitpos);
if (isdn_tty_check_ats(mreg, mval, info, m))
PARSE_ERROR1;
m->mdmreg[mreg] = mval;
break;
case '?':
p[0]++;
isdn_tty_at_cout("\r\n", info);
isdn_tty_at_cout((m->mdmreg[mreg] & (1 << bitpos)) ? "1" : "0",
info);
break;
default:
PARSE_ERROR1;
}
break;
case '?':
p[0]++;
isdn_tty_show_profile(mreg, info);
break;
default:
PARSE_ERROR1;
break;
}
return 0;
}
/*
* Perform ATA command
*/
static void
isdn_tty_cmd_ATA(modem_info * info)
{
atemu *m = &info->emu;
isdn_ctrl cmd;
int l2;
if (info->msr & UART_MSR_RI) {
/* Accept incoming call */
info->last_dir = 0;
strcpy(info->last_num, dev->num[info->drv_index]);
m->mdmreg[REG_RINGCNT] = 0;
info->msr &= ~UART_MSR_RI;
l2 = m->mdmreg[REG_L2PROT];
#ifdef CONFIG_ISDN_AUDIO
/* If more than one bit set in reg18, autoselect Layer2 */
if ((m->mdmreg[REG_SI1] & m->mdmreg[REG_SI1I]) != m->mdmreg[REG_SI1]) {
if (m->mdmreg[REG_SI1I] == 1) {
if ((l2 != ISDN_PROTO_L2_MODEM) && (l2 != ISDN_PROTO_L2_FAX))
l2 = ISDN_PROTO_L2_TRANS;
} else
l2 = ISDN_PROTO_L2_X75I;
}
#endif
cmd.driver = info->isdn_driver;
cmd.command = ISDN_CMD_SETL2;
cmd.arg = info->isdn_channel + (l2 << 8);
info->last_l2 = l2;
isdn_command(&cmd);
cmd.driver = info->isdn_driver;
cmd.command = ISDN_CMD_SETL3;
cmd.arg = info->isdn_channel + (m->mdmreg[REG_L3PROT] << 8);
#ifdef CONFIG_ISDN_TTY_FAX
if (l2 == ISDN_PROTO_L2_FAX) {
cmd.parm.fax = info->fax;
info->fax->direction = ISDN_TTY_FAX_CONN_IN;
}
#endif
isdn_command(&cmd);
cmd.driver = info->isdn_driver;
cmd.arg = info->isdn_channel;
cmd.command = ISDN_CMD_ACCEPTD;
info->dialing = 16;
info->emu.carrierwait = 0;
isdn_command(&cmd);
isdn_timer_ctrl(ISDN_TIMER_CARRIER, 1);
} else
isdn_tty_modem_result(RESULT_NO_ANSWER, info);
}
#ifdef CONFIG_ISDN_AUDIO
/*
* Parse AT+F.. commands
*/
static int
isdn_tty_cmd_PLUSF(char **p, modem_info * info)
{
atemu *m = &info->emu;
char rs[20];
if (!strncmp(p[0], "CLASS", 5)) {
p[0] += 5;
switch (*p[0]) {
case '?':
p[0]++;
sprintf(rs, "\r\n%d",
(m->mdmreg[REG_SI1] & 1) ? 8 : 0);
#ifdef CONFIG_ISDN_TTY_FAX
if (TTY_IS_FCLASS2(info))
sprintf(rs, "\r\n2");
else if (TTY_IS_FCLASS1(info))
sprintf(rs, "\r\n1");
#endif
isdn_tty_at_cout(rs, info);
break;
case '=':
p[0]++;
switch (*p[0]) {
case '0':
p[0]++;
m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_X75I;
m->mdmreg[REG_L3PROT] = ISDN_PROTO_L3_TRANS;
m->mdmreg[REG_SI1] = 4;
info->xmit_size =
m->mdmreg[REG_PSIZE] * 16;
break;
#ifdef CONFIG_ISDN_TTY_FAX
case '1':
p[0]++;
if (!(dev->global_features &
ISDN_FEATURE_L3_FCLASS1))
PARSE_ERROR1;
m->mdmreg[REG_SI1] = 1;
m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_FAX;
m->mdmreg[REG_L3PROT] = ISDN_PROTO_L3_FCLASS1;
info->xmit_size =
m->mdmreg[REG_PSIZE] * 16;
break;
case '2':
p[0]++;
if (!(dev->global_features &
ISDN_FEATURE_L3_FCLASS2))
PARSE_ERROR1;
m->mdmreg[REG_SI1] = 1;
m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_FAX;
m->mdmreg[REG_L3PROT] = ISDN_PROTO_L3_FCLASS2;
info->xmit_size =
m->mdmreg[REG_PSIZE] * 16;
break;
#endif
case '8':
p[0]++;
/* L2 will change on dialout with si=1 */
m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_X75I;
m->mdmreg[REG_L3PROT] = ISDN_PROTO_L3_TRANS;
m->mdmreg[REG_SI1] = 5;
info->xmit_size = VBUF;
break;
case '?':
p[0]++;
strcpy(rs, "\r\n0,");
#ifdef CONFIG_ISDN_TTY_FAX
if (dev->global_features &
ISDN_FEATURE_L3_FCLASS1)
strcat(rs, "1,");
if (dev->global_features &
ISDN_FEATURE_L3_FCLASS2)
strcat(rs, "2,");
#endif
strcat(rs, "8");
isdn_tty_at_cout(rs, info);
break;
default:
PARSE_ERROR1;
}
break;
default:
PARSE_ERROR1;
}
return 0;
}
#ifdef CONFIG_ISDN_TTY_FAX
return (isdn_tty_cmd_PLUSF_FAX(p, info));
#else
PARSE_ERROR1;
#endif
}
/*
* Parse AT+V.. commands
*/
static int
isdn_tty_cmd_PLUSV(char **p, modem_info * info)
{
atemu *m = &info->emu;
isdn_ctrl cmd;
static char *vcmd[] =
{"NH", "IP", "LS", "RX", "SD", "SM", "TX", "DD", NULL};
int i;
int par1;
int par2;
char rs[20];
i = 0;
while (vcmd[i]) {
if (!strncmp(vcmd[i], p[0], 2)) {
p[0] += 2;
break;
}
i++;
}
switch (i) {
case 0:
/* AT+VNH - Auto hangup feature */
switch (*p[0]) {
case '?':
p[0]++;
isdn_tty_at_cout("\r\n1", info);
break;
case '=':
p[0]++;
switch (*p[0]) {
case '1':
p[0]++;
break;
case '?':
p[0]++;
isdn_tty_at_cout("\r\n1", info);
break;
default:
PARSE_ERROR1;
}
break;
default:
PARSE_ERROR1;
}
break;
case 1:
/* AT+VIP - Reset all voice parameters */
isdn_tty_modem_reset_vpar(m);
break;
case 2:
/* AT+VLS - Select device, accept incoming call */
switch (*p[0]) {
case '?':
p[0]++;
sprintf(rs, "\r\n%d", m->vpar[0]);
isdn_tty_at_cout(rs, info);
break;
case '=':
p[0]++;
switch (*p[0]) {
case '0':
p[0]++;
m->vpar[0] = 0;
break;
case '2':
p[0]++;
m->vpar[0] = 2;
break;
case '?':
p[0]++;
isdn_tty_at_cout("\r\n0,2", info);
break;
default:
PARSE_ERROR1;
}
break;
default:
PARSE_ERROR1;
}
break;
case 3:
/* AT+VRX - Start recording */
if (!m->vpar[0])
PARSE_ERROR1;
if (info->online != 1) {
isdn_tty_modem_result(RESULT_NO_ANSWER, info);
return 1;
}
info->dtmf_state = isdn_audio_dtmf_init(info->dtmf_state);
if (!info->dtmf_state) {
printk(KERN_WARNING "isdn_tty: Couldn't malloc dtmf state\n");
PARSE_ERROR1;
}
info->silence_state = isdn_audio_silence_init(info->silence_state);
if (!info->silence_state) {
printk(KERN_WARNING "isdn_tty: Couldn't malloc silence state\n");
PARSE_ERROR1;
}
if (m->vpar[3] < 5) {
info->adpcmr = isdn_audio_adpcm_init(info->adpcmr, m->vpar[3]);
if (!info->adpcmr) {
printk(KERN_WARNING "isdn_tty: Couldn't malloc adpcm state\n");
PARSE_ERROR1;
}
}
#ifdef ISDN_DEBUG_AT
printk(KERN_DEBUG "AT: +VRX\n");
#endif
info->vonline |= 1;
isdn_tty_modem_result(RESULT_CONNECT, info);
return 0;
break;
case 4:
/* AT+VSD - Silence detection */
switch (*p[0]) {
case '?':
p[0]++;
sprintf(rs, "\r\n<%d>,<%d>",
m->vpar[1],
m->vpar[2]);
isdn_tty_at_cout(rs, info);
break;
case '=':
p[0]++;
if ((*p[0]>='0') && (*p[0]<='9')) {
par1 = isdn_getnum(p);
if ((par1 < 0) || (par1 > 31))
PARSE_ERROR1;
if (*p[0] != ',')
PARSE_ERROR1;
p[0]++;
par2 = isdn_getnum(p);
if ((par2 < 0) || (par2 > 255))
PARSE_ERROR1;
m->vpar[1] = par1;
m->vpar[2] = par2;
break;
} else
if (*p[0] == '?') {
p[0]++;
isdn_tty_at_cout("\r\n<0-31>,<0-255>",
info);
break;
} else
PARSE_ERROR1;
break;
default:
PARSE_ERROR1;
}
break;
case 5:
/* AT+VSM - Select compression */
switch (*p[0]) {
case '?':
p[0]++;
sprintf(rs, "\r\n<%d>,<%d><8000>",
m->vpar[3],
m->vpar[1]);
isdn_tty_at_cout(rs, info);
break;
case '=':
p[0]++;
switch (*p[0]) {
case '2':
case '3':
case '4':
case '5':
case '6':
par1 = isdn_getnum(p);
if ((par1 < 2) || (par1 > 6))
PARSE_ERROR1;
m->vpar[3] = par1;
break;
case '?':
p[0]++;
isdn_tty_at_cout("\r\n2;ADPCM;2;0;(8000)\r\n",
info);
isdn_tty_at_cout("3;ADPCM;3;0;(8000)\r\n",
info);
isdn_tty_at_cout("4;ADPCM;4;0;(8000)\r\n",
info);
isdn_tty_at_cout("5;ALAW;8;0;(8000)\r\n",
info);
isdn_tty_at_cout("6;ULAW;8;0;(8000)\r\n",
info);
break;
default:
PARSE_ERROR1;
}
break;
default:
PARSE_ERROR1;
}
break;
case 6:
/* AT+VTX - Start sending */
if (!m->vpar[0])
PARSE_ERROR1;
if (info->online != 1) {
isdn_tty_modem_result(RESULT_NO_ANSWER, info);
return 1;
}
info->dtmf_state = isdn_audio_dtmf_init(info->dtmf_state);
if (!info->dtmf_state) {
printk(KERN_WARNING "isdn_tty: Couldn't malloc dtmf state\n");
PARSE_ERROR1;
}
if (m->vpar[3] < 5) {
info->adpcms = isdn_audio_adpcm_init(info->adpcms, m->vpar[3]);
if (!info->adpcms) {
printk(KERN_WARNING "isdn_tty: Couldn't malloc adpcm state\n");
PARSE_ERROR1;
}
}
#ifdef ISDN_DEBUG_AT
printk(KERN_DEBUG "AT: +VTX\n");
#endif
m->lastDLE = 0;
info->vonline |= 2;
isdn_tty_modem_result(RESULT_CONNECT, info);
return 0;
break;
case 7:
/* AT+VDD - DTMF detection */
switch (*p[0]) {
case '?':
p[0]++;
sprintf(rs, "\r\n<%d>,<%d>",
m->vpar[4],
m->vpar[5]);
isdn_tty_at_cout(rs, info);
break;
case '=':
p[0]++;
if ((*p[0]>='0') && (*p[0]<='9')) {
if (info->online != 1)
PARSE_ERROR1;
par1 = isdn_getnum(p);
if ((par1 < 0) || (par1 > 15))
PARSE_ERROR1;
if (*p[0] != ',')
PARSE_ERROR1;
p[0]++;
par2 = isdn_getnum(p);
if ((par2 < 0) || (par2 > 255))
PARSE_ERROR1;
m->vpar[4] = par1;
m->vpar[5] = par2;
cmd.driver = info->isdn_driver;
cmd.command = ISDN_CMD_AUDIO;
cmd.arg = info->isdn_channel + (ISDN_AUDIO_SETDD << 8);
cmd.parm.num[0] = par1;
cmd.parm.num[1] = par2;
isdn_command(&cmd);
break;
} else
if (*p[0] == '?') {
p[0]++;
isdn_tty_at_cout("\r\n<0-15>,<0-255>",
info);
break;
} else
PARSE_ERROR1;
break;
default:
PARSE_ERROR1;
}
break;
default:
PARSE_ERROR1;
}
return 0;
}
#endif /* CONFIG_ISDN_AUDIO */
/*
* Parse and perform an AT-command-line.
*/
static void
isdn_tty_parse_at(modem_info * info)
{
atemu *m = &info->emu;
char *p;
char ds[40];
#ifdef ISDN_DEBUG_AT
printk(KERN_DEBUG "AT: '%s'\n", m->mdmcmd);
#endif
for (p = &m->mdmcmd[2]; *p;) {
switch (*p) {
case ' ':
p++;
break;
case 'A':
/* A - Accept incoming call */
p++;
isdn_tty_cmd_ATA(info);
return;
break;
case 'D':
/* D - Dial */
if (info->msr & UART_MSR_DCD)
PARSE_ERROR;
if (info->msr & UART_MSR_RI) {
isdn_tty_modem_result(RESULT_NO_CARRIER, info);
return;
}
isdn_tty_getdial(++p, ds, sizeof ds);
p += strlen(p);
if (!strlen(m->msn))
isdn_tty_modem_result(RESULT_NO_MSN_EAZ, info);
else if (strlen(ds))
isdn_tty_dial(ds, info, m);
else
PARSE_ERROR;
return;
case 'E':
/* E - Turn Echo on/off */
p++;
switch (isdn_getnum(&p)) {
case 0:
m->mdmreg[REG_ECHO] &= ~BIT_ECHO;
break;
case 1:
m->mdmreg[REG_ECHO] |= BIT_ECHO;
break;
default:
PARSE_ERROR;
}
break;
case 'H':
/* H - On/Off-hook */
p++;
switch (*p) {
case '0':
p++;
isdn_tty_on_hook(info);
break;
case '1':
p++;
isdn_tty_off_hook();
break;
default:
isdn_tty_on_hook(info);
break;
}
break;
case 'I':
/* I - Information */
p++;
isdn_tty_at_cout("\r\nLinux ISDN", info);
switch (*p) {
case '0':
case '1':
p++;
break;
case '2':
p++;
isdn_tty_report(info);
break;
case '3':
p++;
sprintf(ds, "\r\n%d", info->emu.charge);
isdn_tty_at_cout(ds, info);
break;
default:;
}
break;
#ifdef DUMMY_HAYES_AT
case 'L':
case 'M':
/* only for be compilant with common scripts */
/* no function */
p++;
isdn_getnum(&p);
break;
#endif
case 'O':
/* O - Go online */
p++;
if (info->msr & UART_MSR_DCD)
/* if B-Channel is up */
isdn_tty_modem_result((m->mdmreg[REG_L2PROT] == ISDN_PROTO_L2_MODEM) ? RESULT_CONNECT:RESULT_CONNECT64000, info);
else
isdn_tty_modem_result(RESULT_NO_CARRIER, info);
return;
case 'Q':
/* Q - Turn Emulator messages on/off */
p++;
switch (isdn_getnum(&p)) {
case 0:
m->mdmreg[REG_RESP] |= BIT_RESP;
break;
case 1:
m->mdmreg[REG_RESP] &= ~BIT_RESP;
break;
default:
PARSE_ERROR;
}
break;
case 'S':
/* S - Set/Get Register */
p++;
if (isdn_tty_cmd_ATS(&p, info))
return;
break;
case 'V':
/* V - Numeric or ASCII Emulator-messages */
p++;
switch (isdn_getnum(&p)) {
case 0:
m->mdmreg[REG_RESP] |= BIT_RESPNUM;
break;
case 1:
m->mdmreg[REG_RESP] &= ~BIT_RESPNUM;
break;
default:
PARSE_ERROR;
}
break;
case 'Z':
/* Z - Load Registers from Profile */
p++;
if (info->msr & UART_MSR_DCD) {
info->online = 0;
isdn_tty_on_hook(info);
}
isdn_tty_modem_reset_regs(info, 1);
break;
case '+':
p++;
switch (*p) {
#ifdef CONFIG_ISDN_AUDIO
case 'F':
p++;
if (isdn_tty_cmd_PLUSF(&p, info))
return;
break;
case 'V':
if ((!(m->mdmreg[REG_SI1] & 1)) ||
(m->mdmreg[REG_L2PROT] == ISDN_PROTO_L2_MODEM))
PARSE_ERROR;
p++;
if (isdn_tty_cmd_PLUSV(&p, info))
return;
break;
#endif /* CONFIG_ISDN_AUDIO */
case 'S': /* SUSPEND */
p++;
isdn_tty_get_msnstr(ds, &p);
isdn_tty_suspend(ds, info, m);
break;
case 'R': /* RESUME */
p++;
isdn_tty_get_msnstr(ds, &p);
isdn_tty_resume(ds, info, m);
break;
case 'M': /* MESSAGE */
p++;
isdn_tty_send_msg(info, m, p);
break;
default:
PARSE_ERROR;
}
break;
case '&':
p++;
if (isdn_tty_cmd_ATand(&p, info))
return;
break;
default:
PARSE_ERROR;
}
}
#ifdef CONFIG_ISDN_AUDIO
if (!info->vonline)
#endif
isdn_tty_modem_result(RESULT_OK, info);
}
/* Need own toupper() because standard-toupper is not available
* within modules.
*/
#define my_toupper(c) (((c>='a')&&(c<='z'))?(c&0xdf):c)
/*
* Perform line-editing of AT-commands
*
* Parameters:
* p inputbuffer
* count length of buffer
* channel index to line (minor-device)
*/
static int
isdn_tty_edit_at(const char *p, int count, modem_info * info)
{
atemu *m = &info->emu;
int total = 0;
u_char c;
char eb[2];
int cnt;
for (cnt = count; cnt > 0; p++, cnt--) {
c = *p;
total++;
if (c == m->mdmreg[REG_CR] || c == m->mdmreg[REG_LF]) {
/* Separator (CR or LF) */
m->mdmcmd[m->mdmcmdl] = 0;
if (m->mdmreg[REG_ECHO] & BIT_ECHO) {
eb[0] = c;
eb[1] = 0;
isdn_tty_at_cout(eb, info);
}
if ((m->mdmcmdl >= 2) && (!(strncmp(m->mdmcmd, "AT", 2))))
isdn_tty_parse_at(info);
m->mdmcmdl = 0;
continue;
}
if (c == m->mdmreg[REG_BS] && m->mdmreg[REG_BS] < 128) {
/* Backspace-Function */
if ((m->mdmcmdl > 2) || (!m->mdmcmdl)) {
if (m->mdmcmdl)
m->mdmcmdl--;
if (m->mdmreg[REG_ECHO] & BIT_ECHO)
isdn_tty_at_cout("\b", info);
}
continue;
}
if (cmdchar(c)) {
if (m->mdmreg[REG_ECHO] & BIT_ECHO) {
eb[0] = c;
eb[1] = 0;
isdn_tty_at_cout(eb, info);
}
if (m->mdmcmdl < 255) {
c = my_toupper(c);
switch (m->mdmcmdl) {
case 1:
if (c == 'T') {
m->mdmcmd[m->mdmcmdl] = c;
m->mdmcmd[++m->mdmcmdl] = 0;
break;
} else
m->mdmcmdl = 0;
/* Fall through, check for 'A' */
case 0:
if (c == 'A') {
m->mdmcmd[m->mdmcmdl] = c;
m->mdmcmd[++m->mdmcmdl] = 0;
}
break;
default:
m->mdmcmd[m->mdmcmdl] = c;
m->mdmcmd[++m->mdmcmdl] = 0;
}
}
}
}
return total;
}
/*
* Switch all modem-channels who are online and got a valid
* escape-sequence 1.5 seconds ago, to command-mode.
* This function is called every second via timer-interrupt from within
* timer-dispatcher isdn_timer_function()
*/
void
isdn_tty_modem_escape(void)
{
int ton = 0;
int i;
int midx;
for (i = 0; i < ISDN_MAX_CHANNELS; i++)
if (USG_MODEM(dev->usage[i]))
if ((midx = dev->m_idx[i]) >= 0) {
modem_info *info = &dev->mdm.info[midx];
if (info->online) {
ton = 1;
if ((info->emu.pluscount == 3) &&
time_after(jiffies , info->emu.lastplus + PLUSWAIT2)) {
info->emu.pluscount = 0;
info->online = 0;
isdn_tty_modem_result(RESULT_OK, info);
}
}
}
isdn_timer_ctrl(ISDN_TIMER_MODEMPLUS, ton);
}
/*
* Put a RING-message to all modem-channels who have the RI-bit set.
* This function is called every second via timer-interrupt from within
* timer-dispatcher isdn_timer_function()
*/
void
isdn_tty_modem_ring(void)
{
int ton = 0;
int i;
for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
modem_info *info = &dev->mdm.info[i];
if (info->msr & UART_MSR_RI) {
ton = 1;
isdn_tty_modem_result(RESULT_RING, info);
}
}
isdn_timer_ctrl(ISDN_TIMER_MODEMRING, ton);
}
/*
* For all online tty's, try sending data to
* the lower levels.
*/
void
isdn_tty_modem_xmit(void)
{
int ton = 1;
int i;
for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
modem_info *info = &dev->mdm.info[i];
if (info->online) {
ton = 1;
isdn_tty_senddown(info);
isdn_tty_tint(info);
}
}
isdn_timer_ctrl(ISDN_TIMER_MODEMXMIT, ton);
}
/*
* Check all channels if we have a 'no carrier' timeout.
* Timeout value is set by Register S7.
*/
void
isdn_tty_carrier_timeout(void)
{
int ton = 0;
int i;
for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
modem_info *info = &dev->mdm.info[i];
if (info->dialing) {
if (info->emu.carrierwait++ > info->emu.mdmreg[REG_WAITC]) {
info->dialing = 0;
isdn_tty_modem_result(RESULT_NO_CARRIER, info);
isdn_tty_modem_hup(info, 1);
}
else
ton = 1;
}
}
isdn_timer_ctrl(ISDN_TIMER_CARRIER, ton);
}