diff options
Diffstat (limited to 'drivers/isdn/i4l/isdn_tty.c')
| -rw-r--r-- | drivers/isdn/i4l/isdn_tty.c | 3778 |
1 files changed, 3778 insertions, 0 deletions
diff --git a/drivers/isdn/i4l/isdn_tty.c b/drivers/isdn/i4l/isdn_tty.c new file mode 100644 index 000000000..bc912611f --- /dev/null +++ b/drivers/isdn/i4l/isdn_tty.c @@ -0,0 +1,3778 @@ +/* + * Linux ISDN subsystem, tty functions and AT-command emulator (linklevel). + * + * Copyright 1994-1999 by Fritz Elfert (fritz@isdn4linux.de) + * Copyright 1995,96 by Thinking Objects Software GmbH Wuerzburg + * + * This software may be used and distributed according to the terms + * of the GNU General Public License, incorporated herein by reference. + * + */ +#undef ISDN_TTY_STAT_DEBUG + +#include <linux/isdn.h> +#include <linux/serial.h> /* ASYNC_* flags */ +#include <linux/slab.h> +#include <linux/delay.h> +#include <linux/mutex.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 DEFINE_MUTEX(modem_info_mutex); +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}; + +/* 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) +{ + struct tty_port *port = &info->port; + int c; + int len; + char last; + + if (!info->online) + return 0; + + if (!(info->mcr & UART_MCR_RTS)) + return 0; + + len = skb->len +#ifdef CONFIG_ISDN_AUDIO + + ISDN_AUDIO_SKB_DLECOUNT(skb) +#endif + ; + + c = tty_buffer_request_room(port, len); + if (c < len) + return 0; + +#ifdef CONFIG_ISDN_AUDIO + if (ISDN_AUDIO_SKB_DLECOUNT(skb)) { + int l = skb->len; + unsigned char *dp = skb->data; + while (--l) { + if (*dp == DLE) + tty_insert_flip_char(port, DLE, 0); + tty_insert_flip_char(port, *dp++, 0); + } + if (*dp == DLE) + tty_insert_flip_char(port, DLE, 0); + last = *dp; + } else { +#endif + if (len > 1) + tty_insert_flip_string(port, skb->data, len - 1); + last = skb->data[len - 1]; +#ifdef CONFIG_ISDN_AUDIO + } +#endif + if (info->emu.mdmreg[REG_CPPP] & BIT_CPPP) + tty_insert_flip_char(port, last, 0xFF); + else + tty_insert_flip_char(port, last, TTY_NORMAL); + tty_flip_buffer_push(port); + kfree_skb(skb); + + return 1; +} + +/* isdn_tty_readmodem() is called periodically from within timer-interrupt. + * It tries getting received data from the receive queue an stuff it into + * the tty's flip-buffer. + */ +void +isdn_tty_readmodem(void) +{ + int resched = 0; + int midx; + int i; + int r; + modem_info *info; + + for (i = 0; i < ISDN_MAX_CHANNELS; i++) { + midx = dev->m_idx[i]; + if (midx < 0) + continue; + + info = &dev->mdm.info[midx]; + if (!info->online) + continue; + + 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 (info->mcr & UART_MCR_RTS) { + /* CISCO AsyncPPP Hack */ + if (!(info->emu.mdmreg[REG_CPPP] & BIT_CPPP)) + r = isdn_readbchan_tty(info->isdn_driver, + info->isdn_channel, + &info->port, 0); + else + r = isdn_readbchan_tty(info->isdn_driver, + info->isdn_channel, + &info->port, 1); + if (r) + tty_flip_buffer_push(&info->port); + } else + r = 1; + + if (r) { + info->rcvsched = 0; + resched = 1; + } else + info->rcvsched = 1; + } + if (!resched) + isdn_timer_ctrl(ISDN_TIMER_MODEMREAD, 0); +} + +int +isdn_tty_rcv_skb(int i, int di, int channel, struct sk_buff *skb) +{ + ulong flags; + int midx; +#ifdef CONFIG_ISDN_AUDIO + int ifmt; +#endif + modem_info *info; + + if ((midx = dev->m_idx[i]) < 0) { + /* if midx is invalid, packet is not for tty */ + return 0; + } + info = &dev->mdm.info[midx]; +#ifdef CONFIG_ISDN_AUDIO + ifmt = 1; + + if ((info->vonline) && (!info->emu.vpar[4])) + isdn_audio_calc_dtmf(info, skb->data, skb->len, ifmt); + if ((info->vonline & 1) && (info->emu.vpar[1])) + isdn_audio_calc_silence(info, skb->data, skb->len, ifmt); +#endif + if ((info->online < 2) +#ifdef CONFIG_ISDN_AUDIO + && (!(info->vonline & 1)) +#endif + ) { + /* If Modem not listening, drop data */ + kfree_skb(skb); + return 1; + } + if (info->emu.mdmreg[REG_T70] & BIT_T70) { + if (info->emu.mdmreg[REG_T70] & BIT_T70_EXT) { + /* T.70 decoding: throw away the T.70 header (2 or 4 bytes) */ + if (skb->data[0] == 3) /* pure data packet -> 4 byte headers */ + skb_pull(skb, 4); + else + if (skb->data[0] == 1) /* keepalive packet -> 2 byte hdr */ + skb_pull(skb, 2); + } else + /* T.70 decoding: Simply throw away the T.70 header (4 bytes) */ + if ((skb->data[0] == 1) && ((skb->data[1] == 0) || (skb->data[1] == 1))) + skb_pull(skb, 4); + } +#ifdef CONFIG_ISDN_AUDIO + ISDN_AUDIO_SKB_DLECOUNT(skb) = 0; + ISDN_AUDIO_SKB_LOCK(skb) = 0; + if (info->vonline & 1) { + /* voice conversion/compression */ + switch (info->emu.vpar[3]) { + case 2: + case 3: + case 4: + /* adpcm + * Since compressed data takes less + * space, we can overwrite the buffer. + */ + skb_trim(skb, isdn_audio_xlaw2adpcm(info->adpcmr, + ifmt, + skb->data, + skb->data, + skb->len)); + break; + case 5: + /* a-law */ + if (!ifmt) + isdn_audio_ulaw2alaw(skb->data, skb->len); + break; + case 6: + /* u-law */ + if (ifmt) + isdn_audio_alaw2ulaw(skb->data, skb->len); + break; + } + ISDN_AUDIO_SKB_DLECOUNT(skb) = + isdn_tty_countDLE(skb->data, skb->len); + } +#ifdef CONFIG_ISDN_TTY_FAX + else { + if (info->faxonline & 2) { + isdn_tty_fax_bitorder(info, skb); + ISDN_AUDIO_SKB_DLECOUNT(skb) = + isdn_tty_countDLE(skb->data, skb->len); + } + } +#endif +#endif + /* Try to deliver directly via tty-buf if queue is empty */ + spin_lock_irqsave(&info->readlock, flags); + if (skb_queue_empty(&dev->drv[di]->rpqueue[channel])) + if (isdn_tty_try_read(info, skb)) { + spin_unlock_irqrestore(&info->readlock, flags); + return 1; + } + /* Direct deliver failed or queue wasn't empty. + * Queue up for later dequeueing via timer-irq. + */ + __skb_queue_tail(&dev->drv[di]->rpqueue[channel], skb); + dev->drv[di]->rcvcount[channel] += + (skb->len +#ifdef CONFIG_ISDN_AUDIO + + ISDN_AUDIO_SKB_DLECOUNT(skb) +#endif + ); + spin_unlock_irqrestore(&info->readlock, flags); + /* Schedule dequeuing */ + if ((dev->modempoll) && (info->rcvsched)) + isdn_timer_ctrl(ISDN_TIMER_MODEMREAD, 1); + return 1; +} + +static void +isdn_tty_cleanup_xmit(modem_info *info) +{ + skb_queue_purge(&info->xmit_queue); +#ifdef CONFIG_ISDN_AUDIO + skb_queue_purge(&info->dtmf_queue); +#endif +} + +static void +isdn_tty_tint(modem_info *info) +{ + struct sk_buff *skb = skb_dequeue(&info->xmit_queue); + int len, slen; + + if (!skb) + return; + len = skb->len; + if ((slen = isdn_writebuf_skb_stub(info->isdn_driver, + info->isdn_channel, 1, skb)) == len) { + struct tty_struct *tty = info->port.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->port.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->port.xmit_buf, buflen); + info->xmit_count = 0; +#ifdef CONFIG_ISDN_AUDIO + if (info->vonline & 2) { + /* For now, ifmt is fixed to 1 (alaw), since this + * is used with ISDN everywhere in the world, except + * US, Canada and Japan. + * Later, when US-ISDN protocols are implemented, + * this setting will depend on the D-channel protocol. + */ + int ifmt = 1; + + /* voice conversion/decompression */ + switch (info->emu.vpar[3]) { + case 2: + case 3: + case 4: + /* adpcm, compatible to ZyXel 1496 modem + * with ROM revision 6.01 + */ + audio_len = isdn_audio_adpcm2xlaw(info->adpcms, + ifmt, + skb->data, + skb_put(skb, audio_len), + buflen); + skb_pull(skb, buflen); + skb_trim(skb, audio_len); + break; + case 5: + /* a-law */ + if (!ifmt) + isdn_audio_alaw2ulaw(skb->data, + buflen); + break; + case 6: + /* u-law */ + if (ifmt) + isdn_audio_ulaw2alaw(skb->data, + buflen); + break; + } + } +#endif /* CONFIG_ISDN_AUDIO */ + if (info->emu.mdmreg[REG_T70] & BIT_T70) { + /* Add T.70 simplified header */ + if (info->emu.mdmreg[REG_T70] & BIT_T70_EXT) + memcpy(skb_push(skb, 2), "\1\0", 2); + else + memcpy(skb_push(skb, 4), "\1\0\1\0", 4); + } + skb_queue_tail(&info->xmit_queue, skb); +} + +/************************************************************ + * + * Modem-functions + * + * mostly "stolen" from original Linux-serial.c and friends. + * + ************************************************************/ + +/* The next routine is called once from within timer-interrupt + * triggered within isdn_tty_modem_ncarrier(). It calls + * isdn_tty_modem_result() to stuff a "NO CARRIER" Message + * into the tty's buffer. + */ +static void +isdn_tty_modem_do_ncarrier(unsigned long data) +{ + modem_info *info = (modem_info *) data; + isdn_tty_modem_result(RESULT_NO_CARRIER, info); +} + +/* Next routine is called, whenever the DTR-signal is raised. + * It checks the ncarrier-flag, and triggers the above routine + * when necessary. The ncarrier-flag is set, whenever DTR goes + * low. + */ +static void +isdn_tty_modem_ncarrier(modem_info *info) +{ + if (info->ncarrier) { + info->nc_timer.expires = jiffies + HZ; + add_timer(&info->nc_timer); + } +} + +/* + * return the usage calculated by si and layer 2 protocol + */ +static int +isdn_calc_usage(int si, int l2) +{ + int usg = ISDN_USAGE_MODEM; + +#ifdef CONFIG_ISDN_AUDIO + if (si == 1) { + switch (l2) { + case ISDN_PROTO_L2_MODEM: + usg = ISDN_USAGE_MODEM; + break; +#ifdef CONFIG_ISDN_TTY_FAX + case ISDN_PROTO_L2_FAX: + usg = ISDN_USAGE_FAX; + break; +#endif + case ISDN_PROTO_L2_TRANS: + default: + usg = ISDN_USAGE_VOICE; + break; + } + } +#endif + return (usg); +} + +/* isdn_tty_dial() performs dialing of a tty an the necessary + * setup of the lower levels before that. + */ +static void +isdn_tty_dial(char *n, modem_info *info, atemu *m) +{ + int usg = ISDN_USAGE_MODEM; + int si = 7; + int l2 = m->mdmreg[REG_L2PROT]; + u_long flags; + isdn_ctrl cmd; + int i; + int j; + + for (j = 7; j >= 0; j--) + if (m->mdmreg[REG_SI1] & (1 << j)) { + si = bit2si[j]; + break; + } + usg = isdn_calc_usage(si, l2); +#ifdef CONFIG_ISDN_AUDIO + if ((si == 1) && + (l2 != ISDN_PROTO_L2_MODEM) +#ifdef CONFIG_ISDN_TTY_FAX + && (l2 != ISDN_PROTO_L2_FAX) +#endif + ) { + l2 = ISDN_PROTO_L2_TRANS; + usg = ISDN_USAGE_VOICE; + } +#endif + m->mdmreg[REG_SI1I] = si2bit[si]; + spin_lock_irqsave(&dev->lock, flags); + i = isdn_get_free_channel(usg, l2, m->mdmreg[REG_L3PROT], -1, -1, m->msn); + if (i < 0) { + spin_unlock_irqrestore(&dev->lock, flags); + isdn_tty_modem_result(RESULT_NO_DIALTONE, info); + } else { + info->isdn_driver = dev->drvmap[i]; + info->isdn_channel = dev->chanmap[i]; + info->drv_index = i; + dev->m_idx[i] = info->line; + dev->usage[i] |= ISDN_USAGE_OUTGOING; + info->last_dir = 1; + strcpy(info->last_num, n); + isdn_info_update(); + spin_unlock_irqrestore(&dev->lock, flags); + cmd.driver = info->isdn_driver; + cmd.arg = info->isdn_channel; + cmd.command = ISDN_CMD_CLREAZ; + isdn_command(&cmd); + strcpy(cmd.parm.num, isdn_map_eaz2msn(m->msn, info->isdn_driver)); + cmd.driver = info->isdn_driver; + cmd.command = ISDN_CMD_SETEAZ; + isdn_command(&cmd); + cmd.driver = info->isdn_driver; + cmd.command = ISDN_CMD_SETL2; + info->last_l2 = l2; + cmd.arg = info->isdn_channel + (l2 << 8); + isdn_command(&cmd); + cmd.driver = info->isdn_driver; + cmd.command = ISDN_CMD_SETL3; + cmd.arg = info->isdn_channel + (m->mdmreg[REG_L3PROT] << 8); +#ifdef CONFIG_ISDN_TTY_FAX + if (l2 == ISDN_PROTO_L2_FAX) { + cmd.parm.fax = info->fax; + info->fax->direction = ISDN_TTY_FAX_CONN_OUT; + } +#endif + isdn_command(&cmd); + cmd.driver = info->isdn_driver; + cmd.arg = info->isdn_channel; + sprintf(cmd.parm.setup.phone, "%s", n); + sprintf(cmd.parm.setup.eazmsn, "%s", + isdn_map_eaz2msn(m->msn, info->isdn_driver)); + cmd.parm.setup.si1 = si; + cmd.parm.setup.si2 = m->mdmreg[REG_SI2]; + cmd.command = ISDN_CMD_DIAL; + info->dialing = 1; + info->emu.carrierwait = 0; + strcpy(dev->num[i], n); + isdn_info_update(); + isdn_command(&cmd); + isdn_timer_ctrl(ISDN_TIMER_CARRIER, 1); + } +} + +/* isdn_tty_hangup() disassociates a tty from the real + * ISDN-line (hangup). The usage-status is cleared + * and some cleanup is done also. + */ +void +isdn_tty_modem_hup(modem_info *info, int local) +{ + isdn_ctrl cmd; + int di, ch; + + if (!info) + return; + + di = info->isdn_driver; + ch = info->isdn_channel; + if (di < 0 || ch < 0) + return; + + info->isdn_driver = -1; + info->isdn_channel = -1; + +#ifdef ISDN_DEBUG_MODEM_HUP + printk(KERN_DEBUG "Mhup ttyI%d\n", info->line); +#endif + info->rcvsched = 0; + isdn_tty_flush_buffer(info->port.tty); + if (info->online) { + info->last_lhup = local; + info->online = 0; + isdn_tty_modem_result(RESULT_NO_CARRIER, info); + } +#ifdef CONFIG_ISDN_AUDIO + info->vonline = 0; +#ifdef CONFIG_ISDN_TTY_FAX + info->faxonline = 0; + info->fax->phase = ISDN_FAX_PHASE_IDLE; +#endif + info->emu.vpar[4] = 0; + info->emu.vpar[5] = 8; + kfree(info->dtmf_state); + info->dtmf_state = NULL; + kfree(info->silence_state); + info->silence_state = NULL; + kfree(info->adpcms); + info->adpcms = NULL; + kfree(info->adpcmr); + info->adpcmr = NULL; +#endif + if ((info->msr & UART_MSR_RI) && + (info->emu.mdmreg[REG_RUNG] & BIT_RUNG)) + isdn_tty_modem_result(RESULT_RUNG, info); + info->msr &= ~(UART_MSR_DCD | UART_MSR_RI); + info->lsr |= UART_LSR_TEMT; + + if (local) { + cmd.driver = di; + cmd.command = ISDN_CMD_HANGUP; + cmd.arg = ch; + isdn_command(&cmd); + } + + isdn_all_eaz(di, ch); + info->emu.mdmreg[REG_RINGCNT] = 0; + isdn_free_channel(di, ch, 0); + + if (info->drv_index >= 0) { + dev->m_idx[info->drv_index] = -1; + info->drv_index = -1; + } +} + +/* + * Begin of a CAPI like interface, currently used only for + * supplementary service (CAPI 2.0 part III) + */ +#include <linux/isdn/capicmd.h> +#include <linux/module.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. unfortunately 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 = min(strlen(msg), sizeof(cmd.parm) - sizeof(cmd.parm.cmsg) + + sizeof(cmd.parm.cmsg.para) - 2); + + 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) +{ + struct tty_port *port = &info->port; + uint cflag, + cval, + quot; + int i; + + if (!port->tty) + return; + cflag = port->tty->termios.c_cflag; + + quot = i = cflag & CBAUD; + if (i & CBAUDEX) { + i &= ~CBAUDEX; + if (i < 1 || i > 2) + port->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; + + if (cflag & CLOCAL) + port->flags &= ~ASYNC_CHECK_CD; + else { + port->flags |= ASYNC_CHECK_CD; + } +} + +static int +isdn_tty_startup(modem_info *info) +{ + if (info->port.flags & 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->port.tty) + clear_bit(TTY_IO_ERROR, &info->port.tty->flags); + /* + * and set the speed of the serial port + */ + isdn_tty_change_speed(info); + + info->port.flags |= 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->port.flags & 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->port.tty || (info->port.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->port.tty) + set_bit(TTY_IO_ERROR, &info->port.tty->flags); + + info->port.flags &= ~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->port.xmit_buf[info->xmit_count], buf, c); +#ifdef CONFIG_ISDN_AUDIO + if (info->vonline) { + int cc = isdn_tty_handleDLEdown(info, m, c); + if (info->vonline & 2) { + if (!cc) { + /* If DLE decoding results in zero-transmit, but + * c originally was non-zero, do a wakeup. + */ + tty_wakeup(tty); + info->msr |= UART_MSR_CTS; + info->lsr |= UART_LSR_TEMT; + } + info->xmit_count += cc; + } + if ((info->vonline & 3) == 1) { + /* Do NOT handle Ctrl-Q or Ctrl-S + * when in full-duplex audio mode. + */ + if (isdn_tty_end_vrx(buf, c)) { + info->vonline &= ~1; +#ifdef ISDN_DEBUG_MODEM_VOICE + printk(KERN_DEBUG + "got !^Q/^S, send DLE-ETX,VCON on ttyI%d\n", + info->line); +#endif + isdn_tty_at_cout("\020\003\r\nVCON\r\n", info); + } + } + } else + if (TTY_IS_FCLASS1(info)) { + int cc = isdn_tty_handleDLEdown(info, m, c); + + if (info->vonline & 4) { /* ETX seen */ + isdn_ctrl c; + + c.command = ISDN_CMD_FAXCMD; + c.driver = info->isdn_driver; + c.arg = info->isdn_channel; + c.parm.aux.cmd = ISDN_FAX_CLASS1_CTRL; + c.parm.aux.subcmd = ETX; + isdn_command(&c); + } + info->vonline = 0; +#ifdef ISDN_DEBUG_MODEM_VOICE + printk(KERN_DEBUG "fax dle cc/c %d/%d\n", cc, c); +#endif + info->xmit_count += cc; + } else +#endif + info->xmit_count += c; + } else { + info->msr |= UART_MSR_CTS; + info->lsr |= UART_LSR_TEMT; + if (info->dialing) { + info->dialing = 0; +#ifdef ISDN_DEBUG_MODEM_HUP + printk(KERN_DEBUG "Mhup in isdn_tty_write\n"); +#endif + isdn_tty_modem_result(RESULT_NO_CARRIER, info); + isdn_tty_modem_hup(info, 1); + } else + c = isdn_tty_edit_at(buf, c, info); + } + buf += c; + count -= c; + total += c; + } + atomic_dec(&info->xmit_lock); + if ((info->xmit_count) || !skb_queue_empty(&info->xmit_queue)) { + if (m->mdmreg[REG_DXMT] & BIT_DXMT) { + isdn_tty_senddown(info); + isdn_tty_tint(info); + } + isdn_timer_ctrl(ISDN_TIMER_MODEMXMIT, 1); + } + return total; +} + +static int +isdn_tty_write_room(struct tty_struct *tty) +{ + modem_info *info = (modem_info *) tty->driver_data; + int ret; + + if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_write_room")) + return 0; + if (!info->online) + return info->xmit_size; + ret = info->xmit_size - info->xmit_count; + return (ret < 0) ? 0 : ret; +} + +static int +isdn_tty_chars_in_buffer(struct tty_struct *tty) +{ + modem_info *info = (modem_info *) tty->driver_data; + + if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_chars_in_buffer")) + return 0; + if (!info->online) + return 0; + return (info->xmit_count); +} + +static void +isdn_tty_flush_buffer(struct tty_struct *tty) +{ + modem_info *info; + + if (!tty) { + return; + } + info = (modem_info *) tty->driver_data; + if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_flush_buffer")) { + return; + } + isdn_tty_cleanup_xmit(info); + info->xmit_count = 0; + tty_wakeup(tty); +} + +static void +isdn_tty_flush_chars(struct tty_struct *tty) +{ + modem_info *info = (modem_info *) tty->driver_data; + + if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_flush_chars")) + return; + if ((info->xmit_count) || !skb_queue_empty(&info->xmit_queue)) + isdn_timer_ctrl(ISDN_TIMER_MODEMXMIT, 1); +} + +/* + * ------------------------------------------------------------ + * isdn_tty_throttle() + * + * This routine is called by the upper-layer tty layer to signal that + * incoming characters should be throttled. + * ------------------------------------------------------------ + */ +static void +isdn_tty_throttle(struct tty_struct *tty) +{ + modem_info *info = (modem_info *) tty->driver_data; + + if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_throttle")) + return; + if (I_IXOFF(tty)) + info->x_char = STOP_CHAR(tty); + info->mcr &= ~UART_MCR_RTS; +} + +static void +isdn_tty_unthrottle(struct tty_struct *tty) +{ + modem_info *info = (modem_info *) tty->driver_data; + + if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_unthrottle")) + return; + if (I_IXOFF(tty)) { + if (info->x_char) + info->x_char = 0; + else + info->x_char = START_CHAR(tty); + } + info->mcr |= UART_MCR_RTS; +} + +/* + * ------------------------------------------------------------ + * isdn_tty_ioctl() and friends + * ------------------------------------------------------------ + */ + +/* + * isdn_tty_get_lsr_info - get line status register info + * + * Purpose: Let user call ioctl() to get info when the UART physically + * is emptied. On bus types like RS485, the transmitter must + * release the bus after transmitting. This must be done when + * the transmit shift register is empty, not be done when the + * transmit holding register is empty. This functionality + * allows RS485 driver to be written in user space. + */ +static int +isdn_tty_get_lsr_info(modem_info *info, uint __user *value) +{ + u_char status; + uint result; + + status = info->lsr; + result = ((status & UART_LSR_TEMT) ? TIOCSER_TEMT : 0); + return put_user(result, value); +} + + +static int +isdn_tty_tiocmget(struct tty_struct *tty) +{ + modem_info *info = (modem_info *) tty->driver_data; + u_char control, status; + + if (isdn_tty_paranoia_check(info, tty->name, __func__)) + return -ENODEV; + if (tty->flags & (1 << TTY_IO_ERROR)) + return -EIO; + + mutex_lock(&modem_info_mutex); +#ifdef ISDN_DEBUG_MODEM_IOCTL + printk(KERN_DEBUG "ttyI%d ioctl TIOCMGET\n", info->line); +#endif + + control = info->mcr; + status = info->msr; + mutex_unlock(&modem_info_mutex); + 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, + unsigned int set, unsigned int clear) +{ + modem_info *info = (modem_info *) tty->driver_data; + + if (isdn_tty_paranoia_check(info, tty->name, __func__)) + return -ENODEV; + if (tty->flags & (1 << TTY_IO_ERROR)) + return -EIO; + +#ifdef ISDN_DEBUG_MODEM_IOCTL + printk(KERN_DEBUG "ttyI%d ioctl TIOCMxxx: %x %x\n", info->line, set, clear); +#endif + + mutex_lock(&modem_info_mutex); + 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); + } + } + mutex_unlock(&modem_info_mutex); + return 0; +} + +static int +isdn_tty_ioctl(struct tty_struct *tty, uint cmd, ulong arg) +{ + modem_info *info = (modem_info *) tty->driver_data; + int retval; + + if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_ioctl")) + return -ENODEV; + if (tty->flags & (1 << TTY_IO_ERROR)) + return -EIO; + switch (cmd) { + case TCSBRK: /* SVID version: non-zero arg --> no break */ +#ifdef ISDN_DEBUG_MODEM_IOCTL + printk(KERN_DEBUG "ttyI%d ioctl TCSBRK\n", info->line); +#endif + retval = tty_check_change(tty); + if (retval) + return retval; + tty_wait_until_sent(tty, 0); + return 0; + case TCSBRKP: /* support for POSIX tcsendbreak() */ +#ifdef ISDN_DEBUG_MODEM_IOCTL + printk(KERN_DEBUG "ttyI%d ioctl TCSBRKP\n", info->line); +#endif + retval = tty_check_change(tty); + if (retval) + return retval; + tty_wait_until_sent(tty, 0); + return 0; + case TIOCSERGETLSR: /* Get line status register */ +#ifdef ISDN_DEBUG_MODEM_IOCTL + printk(KERN_DEBUG "ttyI%d ioctl TIOCSERGETLSR\n", info->line); +#endif + return isdn_tty_get_lsr_info(info, (uint __user *) arg); + default: +#ifdef ISDN_DEBUG_MODEM_IOCTL + printk(KERN_DEBUG "UNKNOWN ioctl 0x%08x on ttyi%d\n", cmd, info->line); +#endif + return -ENOIOCTLCMD; + } + return 0; +} + +static void +isdn_tty_set_termios(struct tty_struct *tty, struct ktermios *old_termios) +{ + modem_info *info = (modem_info *) tty->driver_data; + + if (!old_termios) + isdn_tty_change_speed(info); + else { + if (tty->termios.c_cflag == old_termios->c_cflag && + tty->termios.c_ispeed == old_termios->c_ispeed && + tty->termios.c_ospeed == old_termios->c_ospeed) + return; + isdn_tty_change_speed(info); + } +} + +/* + * ------------------------------------------------------------ + * isdn_tty_open() and friends + * ------------------------------------------------------------ + */ + +static int isdn_tty_install(struct tty_driver *driver, struct tty_struct *tty) +{ + modem_info *info = &dev->mdm.info[tty->index]; + + if (isdn_tty_paranoia_check(info, tty->name, __func__)) + return -ENODEV; + + tty->driver_data = info; + + return tty_port_install(&info->port, driver, tty); +} + +/* + * 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 = tty->driver_data; + struct tty_port *port = &info->port; + int retval; + +#ifdef ISDN_DEBUG_MODEM_OPEN + printk(KERN_DEBUG "isdn_tty_open %s, count = %d\n", tty->name, + port->count); +#endif + port->count++; + port->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 + return retval; + } + retval = tty_port_block_til_ready(port, tty, filp); + if (retval) { +#ifdef ISDN_DEBUG_MODEM_OPEN + printk(KERN_DEBUG "isdn_tty_open return after isdn_tty_block_til_ready \n"); +#endif + 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; + struct tty_port *port = &info->port; + 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) && (port->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", port->count); + port->count = 1; + } + if (--port->count < 0) { + printk(KERN_ERR "isdn_tty_close: bad port count for ttyi%d: %d\n", + info->line, port->count); + port->count = 0; + } + if (port->count) { +#ifdef ISDN_DEBUG_MODEM_OPEN + printk(KERN_DEBUG "isdn_tty_close after info->count != 0\n"); +#endif + return; + } + port->flags |= ASYNC_CLOSING; + + 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 (port->flags & ASYNC_INITIALIZED) { + tty_wait_until_sent_from_close(tty, 3000); /* 30 seconds timeout */ + /* + * Before we drop DTR, make sure the UART transmitter + * has completely drained; this is especially + * important if there is a transmit FIFO! + */ + timeout = jiffies + HZ; + while (!(info->lsr & UART_LSR_TEMT)) { + schedule_timeout_interruptible(20); + if (time_after(jiffies, timeout)) + break; + } + } + dev->modempoll--; + isdn_tty_shutdown(info); + isdn_tty_flush_buffer(tty); + tty_ldisc_flush(tty); + port->tty = NULL; + info->ncarrier = 0; + + tty_port_close_end(port, tty); +#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; + struct tty_port *port = &info->port; + + if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_hangup")) + return; + isdn_tty_shutdown(info); + port->count = 0; + port->flags &= ~ASYNC_NORMAL_ACTIVE; + port->tty = NULL; + wake_up_interruptible(&port->open_wait); +} + +/* This routine initializes all emulator-data. + */ +static void +isdn_tty_reset_profile(atemu *m) +{ + m->profile[0] = 0; + m->profile[1] = 0; + m->profile[2] = 43; + m->profile[3] = 13; + m->profile[4] = 10; + m->profile[5] = 8; + m->profile[6] = 3; + m->profile[7] = 60; + m->profile[8] = 2; + m->profile[9] = 6; + m->profile[10] = 7; + m->profile[11] = 70; + m->profile[12] = 0x45; + m->profile[13] = 4; + m->profile[14] = ISDN_PROTO_L2_X75I; + m->profile[15] = ISDN_PROTO_L3_TRANS; + m->profile[16] = ISDN_SERIAL_XMIT_SIZE / 16; + m->profile[17] = ISDN_MODEM_WINSIZE; + m->profile[18] = 4; + m->profile[19] = 0; + m->profile[20] = 0; + m->profile[23] = 0; + m->pmsn[0] = '\0'; + m->plmsn[0] = '\0'; +} + +#ifdef CONFIG_ISDN_AUDIO +static void +isdn_tty_modem_reset_vpar(atemu *m) +{ + m->vpar[0] = 2; /* Voice-device (2 = phone line) */ + m->vpar[1] = 0; /* Silence detection level (0 = none ) */ + m->vpar[2] = 70; /* Silence interval (7 sec. ) */ + m->vpar[3] = 2; /* Compression type (1 = ADPCM-2 ) */ + m->vpar[4] = 0; /* DTMF detection level (0 = softcode ) */ + m->vpar[5] = 8; /* DTMF interval (8 * 5 ms. ) */ +} +#endif + +#ifdef CONFIG_ISDN_TTY_FAX +static void +isdn_tty_modem_reset_faxpar(modem_info *info) +{ + T30_s *f = info->fax; + + f->code = 0; + f->phase = ISDN_FAX_PHASE_IDLE; + f->direction = 0; + f->resolution = 1; /* fine */ + f->rate = 5; /* 14400 bit/s */ + f->width = 0; + f->length = 0; + f->compression = 0; + f->ecm = 0; + f->binary = 0; + f->scantime = 0; + memset(&f->id[0], 32, FAXIDLEN - 1); + f->id[FAXIDLEN - 1] = 0; + f->badlin = 0; + f->badmul = 0; + f->bor = 0; + f->nbc = 0; + f->cq = 0; + f->cr = 0; + f->ctcrty = 0; + f->minsp = 0; + f->phcto = 30; + f->rel = 0; + memset(&f->pollid[0], 32, FAXIDLEN - 1); + f->pollid[FAXIDLEN - 1] = 0; +} +#endif + +static void +isdn_tty_modem_reset_regs(modem_info *info, int force) +{ + atemu *m = &info->emu; + if ((m->mdmreg[REG_DTRR] & BIT_DTRR) || force) { + memcpy(m->mdmreg, m->profile, ISDN_MODEM_NUMREG); + memcpy(m->msn, m->pmsn, ISDN_MSNLEN); + memcpy(m->lmsn, m->plmsn, ISDN_LMSNLEN); + info->xmit_size = m->mdmreg[REG_PSIZE] * 16; + } +#ifdef CONFIG_ISDN_AUDIO + isdn_tty_modem_reset_vpar(m); +#endif +#ifdef CONFIG_ISDN_TTY_FAX + isdn_tty_modem_reset_faxpar(info); +#endif + m->mdmcmdl = 0; +} + +static void +modem_write_profile(atemu *m) +{ + memcpy(m->profile, m->mdmreg, ISDN_MODEM_NUMREG); + memcpy(m->pmsn, m->msn, ISDN_MSNLEN); + memcpy(m->plmsn, m->lmsn, ISDN_LMSNLEN); + if (dev->profd) + send_sig(SIGIO, dev->profd, 1); +} + +static const struct tty_operations modem_ops = { + .install = isdn_tty_install, + .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, +}; + +static int isdn_tty_carrier_raised(struct tty_port *port) +{ + modem_info *info = container_of(port, modem_info, port); + return info->msr & UART_MSR_DCD; +} + +static const struct tty_port_operations isdn_tty_port_ops = { + .carrier_raised = isdn_tty_carrier_raised, +}; + +int +isdn_tty_modem_init(void) +{ + isdn_modem_t *m; + int i, retval; + modem_info *info; + + m = &dev->mdm; + m->tty_modem = alloc_tty_driver(ISDN_MAX_CHANNELS); + if (!m->tty_modem) + return -ENOMEM; + m->tty_modem->name = "ttyI"; + m->tty_modem->major = ISDN_TTY_MAJOR; + m->tty_modem->minor_start = 0; + m->tty_modem->type = TTY_DRIVER_TYPE_SERIAL; + m->tty_modem->subtype = SERIAL_TYPE_NORMAL; + m->tty_modem->init_termios = tty_std_termios; + m->tty_modem->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL; + m->tty_modem->flags = TTY_DRIVER_REAL_RAW; + 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 + tty_port_init(&info->port); + info->port.ops = &isdn_tty_port_ops; + spin_lock_init(&info->readlock); + sprintf(info->last_cause, "0000"); + sprintf(info->last_num, "none"); + info->last_dir = 0; + info->last_lhup = 1; + info->last_l2 = -1; + info->last_si = 0; + isdn_tty_reset_profile(&info->emu); + isdn_tty_modem_reset_regs(info, 1); + info->magic = ISDN_ASYNC_MAGIC; + info->line = i; + info->x_char = 0; + 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 + info->port.xmit_buf = kmalloc(ISDN_SERIAL_XMIT_MAX + 5, + GFP_KERNEL); + if (!info->port.xmit_buf) { + printk(KERN_ERR "Could not allocate modem xmit-buffer\n"); + retval = -ENOMEM; + goto err_unregister; + } + /* Make room for T.70 header */ + info->port.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->port.xmit_buf - 4); + info->port.xmit_buf = NULL; + tty_port_destroy(&info->port); + } + 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->port.xmit_buf - 4); + info->port.xmit_buf = NULL; + tty_port_destroy(&info->port); + } + 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->port.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->port.flags, info->isdn_driver, + info->isdn_channel, dev->usage[idx]); +#endif + if ( +#ifndef FIX_FILE_TRANSFER + (info->port.flags & 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->port.flags & ASYNC_NORMAL_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->port.blocked_open && + (info->emu.mdmreg[REG_DCD] & BIT_DCD)) { + wake_up_interruptible(&info->port.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->port.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_port *port = &info->port; + atemu *m = &info->emu; + char *p; + char c; + u_long flags; + struct sk_buff *skb = NULL; + char *sp = NULL; + int l; + + if (!msg) { + printk(KERN_WARNING "isdn_tty: Null-Message in isdn_tty_at_cout\n"); + return; + } + + l = strlen(msg); + + spin_lock_irqsave(&info->readlock, flags); + if (port->flags & ASYNC_CLOSING) { + spin_unlock_irqrestore(&info->readlock, flags); + return; + } + + /* use queue instead of direct, if online and */ + /* data is in queue or buffer is full */ + if (info->online && ((tty_buffer_request_room(port, l) < l) || + !skb_queue_empty(&dev->drv[info->isdn_driver]->rpqueue[info->isdn_channel]))) { + skb = alloc_skb(l, GFP_ATOMIC); + if (!skb) { + spin_unlock_irqrestore(&info->readlock, flags); + return; + } + sp = skb_put(skb, l); +#ifdef CONFIG_ISDN_AUDIO + ISDN_AUDIO_SKB_DLECOUNT(skb) = 0; + ISDN_AUDIO_SKB_LOCK(skb) = 0; +#endif + } + + for (p = msg; *p; p++) { + switch (*p) { + case '\r': + c = m->mdmreg[REG_CR]; + break; + case '\n': + c = m->mdmreg[REG_LF]; + break; + case '\b': + c = m->mdmreg[REG_BS]; + break; + default: + c = *p; + } + if (skb) { + *sp++ = c; + } else { + if (tty_insert_flip_char(port, c, TTY_NORMAL) == 0) + break; + } + } + if (skb) { + __skb_queue_tail(&dev->drv[info->isdn_driver]->rpqueue[info->isdn_channel], skb); + dev->drv[info->isdn_driver]->rcvcount[info->isdn_channel] += skb->len; + spin_unlock_irqrestore(&info->readlock, flags); + /* Schedule dequeuing */ + if (dev->modempoll && info->rcvsched) + isdn_timer_ctrl(ISDN_TIMER_MODEMREAD, 1); + + } else { + spin_unlock_irqrestore(&info->readlock, flags); + tty_flip_buffer_push(port); + } +} + +/* + * 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->port.flags & ASYNC_CLOSING), + (!info->port.tty)); +#endif + m->mdmreg[REG_RINGCNT] = 0; + del_timer(&info->nc_timer); + info->ncarrier = 0; + if ((info->port.flags & ASYNC_CLOSING) || (!info->port.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->port.flags & ASYNC_CLOSING) || (!info->port.tty)) + return; + + if (info->port.flags & ASYNC_CHECK_CD) + tty_hangup(info->port.tty); + } +} + + +/* + * Display a modem-register-value. + */ +static void +isdn_tty_show_profile(int ridx, modem_info *info) +{ + char v[6]; + + sprintf(v, "\r\n%d", info->emu.mdmreg[ridx]); + isdn_tty_at_cout(v, info); +} + +/* + * Get MSN-string from char-pointer, set pointer to end of number + */ +static void +isdn_tty_get_msnstr(char *n, char **p) +{ + int limit = ISDN_MSNLEN - 1; + + while (((*p[0] >= '0' && *p[0] <= '9') || + /* Why a comma ??? */ + (*p[0] == ',') || (*p[0] == ':')) && + (limit--)) + *n++ = *p[0]++; + *n = '\0'; +} + +/* + * Get phone-number from modem-commandbuffer + */ +static void +isdn_tty_getdial(char *p, char *q, int cnt) +{ + int first = 1; + int limit = ISDN_MSNLEN - 1; /* MUST match the size of interface var to avoid + buffer overflow */ + + while (strchr(" 0123456789,#.*WPTSR-", *p) && *p && --cnt > 0) { + if ((*p >= '0' && *p <= '9') || ((*p == 'S') && first) || + ((*p == 'R') && first) || + (*p == '*') || (*p == '#')) { + *q++ = *p; + limit--; + } + if (!limit) + break; + p++; + first = 0; + } + *q = 0; +} + +#define PARSE_ERROR { isdn_tty_modem_result(RESULT_ERROR, info); return; } +#define PARSE_ERROR1 { isdn_tty_modem_result(RESULT_ERROR, info); return 1; } + +static void +isdn_tty_report(modem_info *info) +{ + atemu *m = &info->emu; + char s[80]; + + isdn_tty_at_cout("\r\nStatistics of last connection:\r\n\r\n", info); + sprintf(s, " Remote Number: %s\r\n", info->last_num); + isdn_tty_at_cout(s, info); + sprintf(s, " Direction: %s\r\n", info->last_dir ? "outgoing" : "incoming"); + isdn_tty_at_cout(s, info); + isdn_tty_at_cout(" Layer-2 Protocol: ", info); + switch (info->last_l2) { + case ISDN_PROTO_L2_X75I: + isdn_tty_at_cout("X.75i", info); + break; + case ISDN_PROTO_L2_X75UI: + isdn_tty_at_cout("X.75ui", info); + break; + case ISDN_PROTO_L2_X75BUI: + isdn_tty_at_cout("X.75bui", info); + break; + case ISDN_PROTO_L2_HDLC: + isdn_tty_at_cout("HDLC", info); + break; + case ISDN_PROTO_L2_V11096: + isdn_tty_at_cout("V.110 9600 Baud", info); + break; + case ISDN_PROTO_L2_V11019: + isdn_tty_at_cout("V.110 19200 Baud", info); + break; + case ISDN_PROTO_L2_V11038: + isdn_tty_at_cout("V.110 38400 Baud", info); + break; + case ISDN_PROTO_L2_TRANS: + isdn_tty_at_cout("transparent", info); + break; + case ISDN_PROTO_L2_MODEM: + isdn_tty_at_cout("modem", info); + break; + case ISDN_PROTO_L2_FAX: + isdn_tty_at_cout("fax", info); + break; + default: + isdn_tty_at_cout("unknown", info); + break; + } + if (m->mdmreg[REG_T70] & BIT_T70) { + isdn_tty_at_cout("/T.70", info); + if (m->mdmreg[REG_T70] & BIT_T70_EXT) + isdn_tty_at_cout("+", info); + } + isdn_tty_at_cout("\r\n", info); + isdn_tty_at_cout(" Service: ", info); + switch (info->last_si) { + case 1: + isdn_tty_at_cout("audio\r\n", info); + break; + case 5: + isdn_tty_at_cout("btx\r\n", info); + break; + case 7: + isdn_tty_at_cout("data\r\n", info); + break; + default: + sprintf(s, "%d\r\n", info->last_si); + isdn_tty_at_cout(s, info); + break; + } + sprintf(s, " Hangup location: %s\r\n", info->last_lhup ? "local" : "remote"); + isdn_tty_at_cout(s, info); + sprintf(s, " Last cause: %s\r\n", info->last_cause); + isdn_tty_at_cout(s, info); +} + +/* + * Parse AT&.. commands. + */ +static int +isdn_tty_cmd_ATand(char **p, modem_info *info) +{ + atemu *m = &info->emu; + int i; + char rb[100]; + +#define MAXRB (sizeof(rb) - 1) + + switch (*p[0]) { + case 'B': + /* &B - Set Buffersize */ + p[0]++; + i = isdn_getnum(p); + if ((i < 0) || (i > ISDN_SERIAL_XMIT_MAX)) + PARSE_ERROR1; +#ifdef CONFIG_ISDN_AUDIO + if ((m->mdmreg[REG_SI1] & 1) && (i > VBUF)) + PARSE_ERROR1; +#endif + m->mdmreg[REG_PSIZE] = i / 16; + info->xmit_size = m->mdmreg[REG_PSIZE] * 16; + switch (m->mdmreg[REG_L2PROT]) { + case ISDN_PROTO_L2_V11096: + case ISDN_PROTO_L2_V11019: + case ISDN_PROTO_L2_V11038: + info->xmit_size /= 10; + } + break; + case 'C': + /* &C - DCD Status */ + p[0]++; + switch (isdn_getnum(p)) { + case 0: + m->mdmreg[REG_DCD] &= ~BIT_DCD; + break; + case 1: + m->mdmreg[REG_DCD] |= BIT_DCD; + break; + default: + PARSE_ERROR1 + } + break; + case 'D': + /* &D - Set DTR-Low-behavior */ + p[0]++; + switch (isdn_getnum(p)) { + case 0: + m->mdmreg[REG_DTRHUP] &= ~BIT_DTRHUP; + m->mdmreg[REG_DTRR] &= ~BIT_DTRR; + break; + case 2: + m->mdmreg[REG_DTRHUP] |= BIT_DTRHUP; + m->mdmreg[REG_DTRR] &= ~BIT_DTRR; + break; + case 3: + m->mdmreg[REG_DTRHUP] |= BIT_DTRHUP; + m->mdmreg[REG_DTRR] |= BIT_DTRR; + break; + default: + PARSE_ERROR1 + } + break; + case 'E': + /* &E -Set EAZ/MSN */ + p[0]++; + isdn_tty_get_msnstr(m->msn, p); + break; + case 'F': + /* &F -Set Factory-Defaults */ + p[0]++; + if (info->msr & UART_MSR_DCD) + PARSE_ERROR1; + isdn_tty_reset_profile(m); + isdn_tty_modem_reset_regs(info, 1); + break; +#ifdef DUMMY_HAYES_AT + case 'K': + /* only for be compilant with common scripts */ + /* &K Flowcontrol - no function */ + p[0]++; + isdn_getnum(p); + break; +#endif + case 'L': + /* &L -Set Numbers to listen on */ + p[0]++; + i = 0; + while (*p[0] && (strchr("0123456789,-*[]?;", *p[0])) && + (i < ISDN_LMSNLEN - 1)) + m->lmsn[i++] = *p[0]++; + m->lmsn[i] = '\0'; + break; + case 'R': + /* &R - Set V.110 bitrate adaption */ + p[0]++; + i = isdn_getnum(p); + switch (i) { + case 0: + /* Switch off V.110, back to X.75 */ + m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_X75I; + m->mdmreg[REG_SI2] = 0; + info->xmit_size = m->mdmreg[REG_PSIZE] * 16; + break; + case 9600: + m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_V11096; + m->mdmreg[REG_SI2] = 197; + info->xmit_size = m->mdmreg[REG_PSIZE] * 16 / 10; + break; + case 19200: + m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_V11019; + m->mdmreg[REG_SI2] = 199; + info->xmit_size = m->mdmreg[REG_PSIZE] * 16 / 10; + break; + case 38400: + m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_V11038; + m->mdmreg[REG_SI2] = 198; /* no existing standard for this */ + info->xmit_size = m->mdmreg[REG_PSIZE] * 16 / 10; + break; + default: + PARSE_ERROR1; + } + /* Switch off T.70 */ + m->mdmreg[REG_T70] &= ~(BIT_T70 | BIT_T70_EXT); + /* Set Service 7 */ + m->mdmreg[REG_SI1] |= 4; + break; + case 'S': + /* &S - Set Windowsize */ + p[0]++; + i = isdn_getnum(p); + if ((i > 0) && (i < 9)) + m->mdmreg[REG_WSIZE] = i; + else + PARSE_ERROR1; + break; + case 'V': + /* &V - Show registers */ + p[0]++; + isdn_tty_at_cout("\r\n", info); + for (i = 0; i < ISDN_MODEM_NUMREG; i++) { + sprintf(rb, "S%02d=%03d%s", i, + m->mdmreg[i], ((i + 1) % 10) ? " " : "\r\n"); + isdn_tty_at_cout(rb, info); + } + sprintf(rb, "\r\nEAZ/MSN: %.50s\r\n", + strlen(m->msn) ? m->msn : "None"); + isdn_tty_at_cout(rb, info); + if (strlen(m->lmsn)) { + isdn_tty_at_cout("\r\nListen: ", info); + isdn_tty_at_cout(m->lmsn, info); + isdn_tty_at_cout("\r\n", info); + } + break; + case 'W': + /* &W - Write Profile */ + p[0]++; + switch (*p[0]) { + case '0': + p[0]++; + modem_write_profile(m); + break; + default: + PARSE_ERROR1; + } + break; + case 'X': + /* &X - Switch to BTX-Mode and T.70 */ + p[0]++; + switch (isdn_getnum(p)) { + case 0: + m->mdmreg[REG_T70] &= ~(BIT_T70 | BIT_T70_EXT); + info->xmit_size = m->mdmreg[REG_PSIZE] * 16; + break; + case 1: + m->mdmreg[REG_T70] |= BIT_T70; + m->mdmreg[REG_T70] &= ~BIT_T70_EXT; + m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_X75I; + info->xmit_size = 112; + m->mdmreg[REG_SI1] = 4; + m->mdmreg[REG_SI2] = 0; + break; + case 2: + m->mdmreg[REG_T70] |= (BIT_T70 | BIT_T70_EXT); + m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_X75I; + info->xmit_size = 112; + m->mdmreg[REG_SI1] = 4; + m->mdmreg[REG_SI2] = 0; + break; + default: + PARSE_ERROR1; + } + break; + default: + PARSE_ERROR1; + } + return 0; +} + +static int +isdn_tty_check_ats(int mreg, int mval, modem_info *info, atemu *m) +{ + /* Some plausibility checks */ + switch (mreg) { + case REG_L2PROT: + if (mval > ISDN_PROTO_L2_MAX) + return 1; + break; + case REG_PSIZE: + if ((mval * 16) > ISDN_SERIAL_XMIT_MAX) + return 1; +#ifdef CONFIG_ISDN_AUDIO + if ((m->mdmreg[REG_SI1] & 1) && (mval > VBUFX)) + return 1; +#endif + info->xmit_size = mval * 16; + switch (m->mdmreg[REG_L2PROT]) { + case ISDN_PROTO_L2_V11096: + case ISDN_PROTO_L2_V11019: + case ISDN_PROTO_L2_V11038: + info->xmit_size /= 10; + } + break; + case REG_SI1I: + case REG_PLAN: + case REG_SCREEN: + /* readonly registers */ + return 1; + } + return 0; +} + +/* + * Perform ATS command + */ +static int +isdn_tty_cmd_ATS(char **p, modem_info *info) +{ + atemu *m = &info->emu; + int bitpos; + int mreg; + int mval; + int bval; + + mreg = isdn_getnum(p); + if (mreg < 0 || mreg >= ISDN_MODEM_NUMREG) + PARSE_ERROR1; + switch (*p[0]) { + case '=': + p[0]++; + mval = isdn_getnum(p); + if (mval < 0 || mval > 255) + PARSE_ERROR1; + if (isdn_tty_check_ats(mreg, mval, info, m)) + PARSE_ERROR1; + m->mdmreg[mreg] = mval; + break; + case '.': + /* Set/Clear a single bit */ + p[0]++; + bitpos = isdn_getnum(p); + if ((bitpos < 0) || (bitpos > 7)) + PARSE_ERROR1; + switch (*p[0]) { + case '=': + p[0]++; + bval = isdn_getnum(p); + if (bval < 0 || bval > 1) + PARSE_ERROR1; + if (bval) + mval = m->mdmreg[mreg] | (1 << bitpos); + else + mval = m->mdmreg[mreg] & ~(1 << bitpos); + if (isdn_tty_check_ats(mreg, mval, info, m)) + PARSE_ERROR1; + m->mdmreg[mreg] = mval; + break; + case '?': + p[0]++; + isdn_tty_at_cout("\r\n", info); + isdn_tty_at_cout((m->mdmreg[mreg] & (1 << bitpos)) ? "1" : "0", + info); + break; + default: + PARSE_ERROR1; + } + break; + case '?': + p[0]++; + isdn_tty_show_profile(mreg, info); + break; + default: + PARSE_ERROR1; + break; + } + return 0; +} + +/* + * Perform ATA command + */ +static void +isdn_tty_cmd_ATA(modem_info *info) +{ + atemu *m = &info->emu; + isdn_ctrl cmd; + int l2; + + if (info->msr & UART_MSR_RI) { + /* Accept incoming call */ + info->last_dir = 0; + strcpy(info->last_num, dev->num[info->drv_index]); + m->mdmreg[REG_RINGCNT] = 0; + info->msr &= ~UART_MSR_RI; + l2 = m->mdmreg[REG_L2PROT]; +#ifdef CONFIG_ISDN_AUDIO + /* If more than one bit set in reg18, autoselect Layer2 */ + if ((m->mdmreg[REG_SI1] & m->mdmreg[REG_SI1I]) != m->mdmreg[REG_SI1]) { + if (m->mdmreg[REG_SI1I] == 1) { + if ((l2 != ISDN_PROTO_L2_MODEM) && (l2 != ISDN_PROTO_L2_FAX)) + l2 = ISDN_PROTO_L2_TRANS; + } else + l2 = ISDN_PROTO_L2_X75I; + } +#endif + cmd.driver = info->isdn_driver; + cmd.command = ISDN_CMD_SETL2; + cmd.arg = info->isdn_channel + (l2 << 8); + info->last_l2 = l2; + isdn_command(&cmd); + cmd.driver = info->isdn_driver; + cmd.command = ISDN_CMD_SETL3; + cmd.arg = info->isdn_channel + (m->mdmreg[REG_L3PROT] << 8); +#ifdef CONFIG_ISDN_TTY_FAX + if (l2 == ISDN_PROTO_L2_FAX) { + cmd.parm.fax = info->fax; + info->fax->direction = ISDN_TTY_FAX_CONN_IN; + } +#endif + isdn_command(&cmd); + cmd.driver = info->isdn_driver; + cmd.arg = info->isdn_channel; + cmd.command = ISDN_CMD_ACCEPTD; + info->dialing = 16; + info->emu.carrierwait = 0; + isdn_command(&cmd); + isdn_timer_ctrl(ISDN_TIMER_CARRIER, 1); + } else + isdn_tty_modem_result(RESULT_NO_ANSWER, info); +} + +#ifdef CONFIG_ISDN_AUDIO +/* + * Parse AT+F.. commands + */ +static int +isdn_tty_cmd_PLUSF(char **p, modem_info *info) +{ + atemu *m = &info->emu; + char rs[20]; + + if (!strncmp(p[0], "CLASS", 5)) { + p[0] += 5; + switch (*p[0]) { + case '?': + p[0]++; + sprintf(rs, "\r\n%d", + (m->mdmreg[REG_SI1] & 1) ? 8 : 0); +#ifdef CONFIG_ISDN_TTY_FAX + if (TTY_IS_FCLASS2(info)) + sprintf(rs, "\r\n2"); + else if (TTY_IS_FCLASS1(info)) + sprintf(rs, "\r\n1"); +#endif + isdn_tty_at_cout(rs, info); + break; + case '=': + p[0]++; + switch (*p[0]) { + case '0': + p[0]++; + m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_X75I; + m->mdmreg[REG_L3PROT] = ISDN_PROTO_L3_TRANS; + m->mdmreg[REG_SI1] = 4; + info->xmit_size = + m->mdmreg[REG_PSIZE] * 16; + break; +#ifdef CONFIG_ISDN_TTY_FAX + case '1': + p[0]++; + if (!(dev->global_features & + ISDN_FEATURE_L3_FCLASS1)) + PARSE_ERROR1; + m->mdmreg[REG_SI1] = 1; + m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_FAX; + m->mdmreg[REG_L3PROT] = ISDN_PROTO_L3_FCLASS1; + info->xmit_size = + m->mdmreg[REG_PSIZE] * 16; + break; + case '2': + p[0]++; + if (!(dev->global_features & + ISDN_FEATURE_L3_FCLASS2)) + PARSE_ERROR1; + m->mdmreg[REG_SI1] = 1; + m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_FAX; + m->mdmreg[REG_L3PROT] = ISDN_PROTO_L3_FCLASS2; + info->xmit_size = + m->mdmreg[REG_PSIZE] * 16; + break; +#endif + case '8': + p[0]++; + /* L2 will change on dialout with si=1 */ + m->mdmreg[REG_L2PROT] = ISDN_PROTO_L2_X75I; + m->mdmreg[REG_L3PROT] = ISDN_PROTO_L3_TRANS; + m->mdmreg[REG_SI1] = 5; + info->xmit_size = VBUF; + break; + case '?': + p[0]++; + strcpy(rs, "\r\n0,"); +#ifdef CONFIG_ISDN_TTY_FAX + if (dev->global_features & + ISDN_FEATURE_L3_FCLASS1) + strcat(rs, "1,"); + if (dev->global_features & + ISDN_FEATURE_L3_FCLASS2) + strcat(rs, "2,"); +#endif + strcat(rs, "8"); + isdn_tty_at_cout(rs, info); + break; + default: + PARSE_ERROR1; + } + break; + default: + PARSE_ERROR1; + } + return 0; + } +#ifdef CONFIG_ISDN_TTY_FAX + return (isdn_tty_cmd_PLUSF_FAX(p, info)); +#else + PARSE_ERROR1; +#endif +} + +/* + * Parse AT+V.. commands + */ +static int +isdn_tty_cmd_PLUSV(char **p, modem_info *info) +{ + atemu *m = &info->emu; + isdn_ctrl cmd; + static char *vcmd[] = + {"NH", "IP", "LS", "RX", "SD", "SM", "TX", "DD", NULL}; + int i; + int par1; + int par2; + char rs[20]; + + i = 0; + while (vcmd[i]) { + if (!strncmp(vcmd[i], p[0], 2)) { + p[0] += 2; + break; + } + i++; + } + switch (i) { + case 0: + /* AT+VNH - Auto hangup feature */ + switch (*p[0]) { + case '?': + p[0]++; + isdn_tty_at_cout("\r\n1", info); + break; + case '=': + p[0]++; + switch (*p[0]) { + case '1': + p[0]++; + break; + case '?': + p[0]++; + isdn_tty_at_cout("\r\n1", info); + break; + default: + PARSE_ERROR1; + } + break; + default: + PARSE_ERROR1; + } + break; + case 1: + /* AT+VIP - Reset all voice parameters */ + isdn_tty_modem_reset_vpar(m); + break; + case 2: + /* AT+VLS - Select device, accept incoming call */ + switch (*p[0]) { + case '?': + p[0]++; + sprintf(rs, "\r\n%d", m->vpar[0]); + isdn_tty_at_cout(rs, info); + break; + case '=': + p[0]++; + switch (*p[0]) { + case '0': + p[0]++; + m->vpar[0] = 0; + break; + case '2': + p[0]++; + m->vpar[0] = 2; + break; + case '?': + p[0]++; + isdn_tty_at_cout("\r\n0,2", info); + break; + default: + PARSE_ERROR1; + } + break; + default: + PARSE_ERROR1; + } + break; + case 3: + /* AT+VRX - Start recording */ + if (!m->vpar[0]) + PARSE_ERROR1; + if (info->online != 1) { + isdn_tty_modem_result(RESULT_NO_ANSWER, info); + return 1; + } + info->dtmf_state = isdn_audio_dtmf_init(info->dtmf_state); + if (!info->dtmf_state) { + printk(KERN_WARNING "isdn_tty: Couldn't malloc dtmf state\n"); + PARSE_ERROR1; + } + info->silence_state = isdn_audio_silence_init(info->silence_state); + if (!info->silence_state) { + printk(KERN_WARNING "isdn_tty: Couldn't malloc silence state\n"); + PARSE_ERROR1; + } + if (m->vpar[3] < 5) { + info->adpcmr = isdn_audio_adpcm_init(info->adpcmr, m->vpar[3]); + if (!info->adpcmr) { + printk(KERN_WARNING "isdn_tty: Couldn't malloc adpcm state\n"); + PARSE_ERROR1; + } + } +#ifdef ISDN_DEBUG_AT + printk(KERN_DEBUG "AT: +VRX\n"); +#endif + info->vonline |= 1; + isdn_tty_modem_result(RESULT_CONNECT, info); + return 0; + break; + case 4: + /* AT+VSD - Silence detection */ + switch (*p[0]) { + case '?': + p[0]++; + sprintf(rs, "\r\n<%d>,<%d>", + m->vpar[1], + m->vpar[2]); + isdn_tty_at_cout(rs, info); + break; + case '=': + p[0]++; + if ((*p[0] >= '0') && (*p[0] <= '9')) { + par1 = isdn_getnum(p); + if ((par1 < 0) || (par1 > 31)) + PARSE_ERROR1; + if (*p[0] != ',') + PARSE_ERROR1; + p[0]++; + par2 = isdn_getnum(p); + if ((par2 < 0) || (par2 > 255)) + PARSE_ERROR1; + m->vpar[1] = par1; + m->vpar[2] = par2; + break; + } else + if (*p[0] == '?') { + p[0]++; + isdn_tty_at_cout("\r\n<0-31>,<0-255>", + info); + break; + } else + PARSE_ERROR1; + break; + default: + PARSE_ERROR1; + } + break; + case 5: + /* AT+VSM - Select compression */ + switch (*p[0]) { + case '?': + p[0]++; + sprintf(rs, "\r\n<%d>,<%d><8000>", + m->vpar[3], + m->vpar[1]); + isdn_tty_at_cout(rs, info); + break; + case '=': + p[0]++; + switch (*p[0]) { + case '2': + case '3': + case '4': + case '5': + case '6': + par1 = isdn_getnum(p); + if ((par1 < 2) || (par1 > 6)) + PARSE_ERROR1; + m->vpar[3] = par1; + break; + case '?': + p[0]++; + isdn_tty_at_cout("\r\n2;ADPCM;2;0;(8000)\r\n", + info); + isdn_tty_at_cout("3;ADPCM;3;0;(8000)\r\n", + info); + isdn_tty_at_cout("4;ADPCM;4;0;(8000)\r\n", + info); + isdn_tty_at_cout("5;ALAW;8;0;(8000)\r\n", + info); + isdn_tty_at_cout("6;ULAW;8;0;(8000)\r\n", + info); + break; + default: + PARSE_ERROR1; + } + break; + default: + PARSE_ERROR1; + } + break; + case 6: + /* AT+VTX - Start sending */ + if (!m->vpar[0]) + PARSE_ERROR1; + if (info->online != 1) { + isdn_tty_modem_result(RESULT_NO_ANSWER, info); + return 1; + } + info->dtmf_state = isdn_audio_dtmf_init(info->dtmf_state); + if (!info->dtmf_state) { + printk(KERN_WARNING "isdn_tty: Couldn't malloc dtmf state\n"); + PARSE_ERROR1; + } + if (m->vpar[3] < 5) { + info->adpcms = isdn_audio_adpcm_init(info->adpcms, m->vpar[3]); + if (!info->adpcms) { + printk(KERN_WARNING "isdn_tty: Couldn't malloc adpcm state\n"); + PARSE_ERROR1; + } + } +#ifdef ISDN_DEBUG_AT + printk(KERN_DEBUG "AT: +VTX\n"); +#endif + m->lastDLE = 0; + info->vonline |= 2; + isdn_tty_modem_result(RESULT_CONNECT, info); + return 0; + break; + case 7: + /* AT+VDD - DTMF detection */ + switch (*p[0]) { + case '?': + p[0]++; + sprintf(rs, "\r\n<%d>,<%d>", + m->vpar[4], + m->vpar[5]); + isdn_tty_at_cout(rs, info); + break; + case '=': + p[0]++; + if ((*p[0] >= '0') && (*p[0] <= '9')) { + if (info->online != 1) + PARSE_ERROR1; + par1 = isdn_getnum(p); + if ((par1 < 0) || (par1 > 15)) + PARSE_ERROR1; + if (*p[0] != ',') + PARSE_ERROR1; + p[0]++; + par2 = isdn_getnum(p); + if ((par2 < 0) || (par2 > 255)) + PARSE_ERROR1; + m->vpar[4] = par1; + m->vpar[5] = par2; + cmd.driver = info->isdn_driver; + cmd.command = ISDN_CMD_AUDIO; + cmd.arg = info->isdn_channel + (ISDN_AUDIO_SETDD << 8); + cmd.parm.num[0] = par1; + cmd.parm.num[1] = par2; + isdn_command(&cmd); + break; + } else + if (*p[0] == '?') { + p[0]++; + isdn_tty_at_cout("\r\n<0-15>,<0-255>", + info); + break; + } else + PARSE_ERROR1; + break; + default: + PARSE_ERROR1; + } + break; + default: + PARSE_ERROR1; + } + return 0; +} +#endif /* CONFIG_ISDN_AUDIO */ + +/* + * Parse and perform an AT-command-line. + */ +static void +isdn_tty_parse_at(modem_info *info) +{ + atemu *m = &info->emu; + char *p; + char ds[ISDN_MSNLEN]; + +#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; + 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++; + snprintf(ds, sizeof(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]) && (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) + continue; + 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); +} |