Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
diff --git a/drivers/isdn/i4l/isdn_tty.c b/drivers/isdn/i4l/isdn_tty.c
new file mode 100644
index 0000000..e21007e
--- /dev/null
+++ b/drivers/isdn/i4l/isdn_tty.c
@@ -0,0 +1,3911 @@
+/* $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/config.h>
+#include <linux/isdn.h>
+#include <linux/delay.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;
+
+ if (info->online) {
+ if ((tty = info->tty)) {
+ if (info->mcr & UART_MCR_RTS) {
+ c = TTY_FLIPBUF_SIZE - tty->flip.count;
+ len = skb->len
+#ifdef CONFIG_ISDN_AUDIO
+ + ISDN_AUDIO_SKB_DLECOUNT(skb)
+#endif
+ ;
+ if (c >= len) {
+#ifdef CONFIG_ISDN_AUDIO
+ if (ISDN_AUDIO_SKB_DLECOUNT(skb))
+ while (skb->len--) {
+ if (*skb->data == DLE)
+ tty_insert_flip_char(tty, DLE, 0);
+ tty_insert_flip_char(tty, *skb->data++, 0);
+ } else {
+#endif
+ memcpy(tty->flip.char_buf_ptr,
+ skb->data, len);
+ tty->flip.count += len;
+ tty->flip.char_buf_ptr += len;
+ memset(tty->flip.flag_buf_ptr, 0, len);
+ tty->flip.flag_buf_ptr += len;
+#ifdef CONFIG_ISDN_AUDIO
+ }
+#endif
+ if (info->emu.mdmreg[REG_CPPP] & BIT_CPPP)
+ tty->flip.flag_buf_ptr[len - 1] = 0xff;
+ schedule_delayed_work(&tty->flip.work, 1);
+ 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 c;
+ 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) {
+ c = TTY_FLIPBUF_SIZE - tty->flip.count;
+ if (c > 0) {
+ r = isdn_readbchan(info->isdn_driver, info->isdn_channel,
+ tty->flip.char_buf_ptr,
+ tty->flip.flag_buf_ptr, c, NULL);
+ /* CISCO AsyncPPP Hack */
+ if (!(info->emu.mdmreg[REG_CPPP] & BIT_CPPP))
+ memset(tty->flip.flag_buf_ptr, 0, r);
+ tty->flip.count += r;
+ tty->flip.flag_buf_ptr += r;
+ tty->flip.char_buf_ptr += r;
+ if (r)
+ schedule_delayed_work(&tty->flip.work, 1);
+ }
+ } 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-flip-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;
+}
+
+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 flip-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
+ */
+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;
+ if (info->dtmf_state) {
+ kfree(info->dtmf_state);
+ info->dtmf_state = NULL;
+ }
+ if (info->silence_state) {
+ kfree(info->silence_state);
+ info->silence_state = NULL;
+ }
+ if (info->adpcms) {
+ kfree(info->adpcms);
+ info->adpcms = NULL;
+ }
+ if (info->adpcmr) {
+ 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_len(&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;
+ wake_up_interruptible(&tty->write_wait);
+ 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_len(&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, __FUNCTION__))
+ return -ENODEV;
+ if (tty->flags & (1 << TTY_IO_ERROR))
+ return -EIO;
+
+#ifdef ISDN_DEBUG_MODEM_IOCTL
+ printk(KERN_DEBUG "ttyI%d ioctl TIOCMGET\n", info->line);
+#endif
+
+ control = info->mcr;
+ status = info->msr;
+ 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, __FUNCTION__))
+ 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
+
+ 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);
+ }
+ }
+ 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 TIOCGSOFTCAR:
+#ifdef ISDN_DEBUG_MODEM_IOCTL
+ printk(KERN_DEBUG "ttyI%d ioctl TIOCGSOFTCAR\n", info->line);
+#endif
+ return put_user(C_CLOCAL(tty) ? 1 : 0, (ulong __user *) arg);
+ case TIOCSSOFTCAR:
+#ifdef ISDN_DEBUG_MODEM_IOCTL
+ printk(KERN_DEBUG "ttyI%d ioctl TIOCSSOFTCAR\n", info->line);
+#endif
+ if (get_user(arg, (ulong __user *) arg))
+ return -EFAULT;
+ tty->termios->c_cflag =
+ ((tty->termios->c_cflag & ~CLOCAL) |
+ (arg ? CLOCAL : 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 termios *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)
+ 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", __FUNCTION__);
+ 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
+ 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)) {
+ set_current_state(TASK_INTERRUPTIBLE);
+ schedule_timeout(20);
+ if (time_after(jiffies,timeout))
+ break;
+ }
+ }
+ dev->modempoll--;
+ isdn_tty_shutdown(info);
+
+ if (tty->driver->flush_buffer)
+ tty->driver->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 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->devfs_name = "isdn/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_NO_DEVFS;
+ 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);
+ init_MUTEX(&info->write_sem);
+ 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;
+
+ if (!msg) {
+ printk(KERN_WARNING "isdn_tty: Null-Message in isdn_tty_at_cout\n");
+ return;
+ }
+ 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 flip, if online and */
+ /* data is in queue or flip buffer is full */
+ if ((info->online) && (((tty->flip.count + strlen(msg)) >= TTY_FLIPBUF_SIZE) ||
+ (!skb_queue_empty(&dev->drv[info->isdn_driver]->rpqueue[info->isdn_channel])))) {
+ skb = alloc_skb(strlen(msg), GFP_ATOMIC);
+ if (!skb) {
+ spin_unlock_irqrestore(&info->readlock, flags);
+ return;
+ }
+ sp = skb_put(skb, strlen(msg));
+#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->flip.count >= TTY_FLIPBUF_SIZE)
+ break;
+ tty_insert_flip_char(tty, c, 0);
+ }
+ }
+ 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);
+ schedule_delayed_work(&tty->flip.work, 1);
+ }
+}
+
+/*
+ * 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;
+ }
+ tty_ldisc_flush(info->tty);
+ 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,#.*WPTS-", *p) && *p && --cnt>0) {
+ if ((*p >= '0' && *p <= '9') || ((*p == 'S') && 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))
+ 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);
+}