diff options
Diffstat (limited to 'drivers/isdn/i4l/isdn_tty.c')
| -rw-r--r-- | drivers/isdn/i4l/isdn_tty.c | 178 |
1 files changed, 93 insertions, 85 deletions
diff --git a/drivers/isdn/i4l/isdn_tty.c b/drivers/isdn/i4l/isdn_tty.c index 1ff307276d2d..74b05188c18f 100644 --- a/drivers/isdn/i4l/isdn_tty.c +++ b/drivers/isdn/i4l/isdn_tty.c @@ -65,49 +65,54 @@ isdn_tty_try_read(modem_info *info, struct sk_buff *skb) struct tty_struct *tty; char last; - if (info->online) { - if ((tty = info->tty)) { - if (info->mcr & UART_MCR_RTS) { - len = skb->len + if (!info->online) + return 0; + + tty = info->tty; + if (!tty) + return 0; + + if (!(info->mcr & UART_MCR_RTS)) + return 0; + + len = skb->len #ifdef CONFIG_ISDN_AUDIO - + ISDN_AUDIO_SKB_DLECOUNT(skb) + + ISDN_AUDIO_SKB_DLECOUNT(skb) #endif - ; + ; + + c = tty_buffer_request_room(tty, len); + if (c < len) + return 0; - c = tty_buffer_request_room(tty, len); - if (c >= len) { -#ifdef CONFIG_ISDN_AUDIO - if (ISDN_AUDIO_SKB_DLECOUNT(skb)) { - int l = skb->len; - unsigned char *dp = skb->data; - while (--l) { - if (*dp == DLE) - tty_insert_flip_char(tty, DLE, 0); - tty_insert_flip_char(tty, *dp++, 0); - } - if (*dp == DLE) - tty_insert_flip_char(tty, DLE, 0); - last = *dp; - } else { -#endif - if (len > 1) - tty_insert_flip_string(tty, skb->data, len - 1); - last = skb->data[len - 1]; #ifdef CONFIG_ISDN_AUDIO - } + if (ISDN_AUDIO_SKB_DLECOUNT(skb)) { + int l = skb->len; + unsigned char *dp = skb->data; + while (--l) { + if (*dp == DLE) + tty_insert_flip_char(tty, DLE, 0); + tty_insert_flip_char(tty, *dp++, 0); + } + if (*dp == DLE) + tty_insert_flip_char(tty, DLE, 0); + last = *dp; + } else { #endif - if (info->emu.mdmreg[REG_CPPP] & BIT_CPPP) - tty_insert_flip_char(tty, last, 0xFF); - else - tty_insert_flip_char(tty, last, TTY_NORMAL); - tty_flip_buffer_push(tty); - kfree_skb(skb); - return 1; - } - } - } + if (len > 1) + tty_insert_flip_string(tty, skb->data, len - 1); + last = skb->data[len - 1]; +#ifdef CONFIG_ISDN_AUDIO } - return 0; +#endif + if (info->emu.mdmreg[REG_CPPP] & BIT_CPPP) + tty_insert_flip_char(tty, last, 0xFF); + else + tty_insert_flip_char(tty, last, TTY_NORMAL); + tty_flip_buffer_push(tty); + kfree_skb(skb); + + return 1; } /* isdn_tty_readmodem() is called periodically from within timer-interrupt. @@ -125,35 +130,39 @@ isdn_tty_readmodem(void) 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; + 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 ((tty = info->tty)) { - if (info->mcr & UART_MCR_RTS) { - /* CISCO AsyncPPP Hack */ - if (!(info->emu.mdmreg[REG_CPPP] & BIT_CPPP)) - r = isdn_readbchan_tty(info->isdn_driver, info->isdn_channel, tty, 0); - else - r = isdn_readbchan_tty(info->isdn_driver, info->isdn_channel, tty, 1); - if (r) - tty_flip_buffer_push(tty); - } else - r = 1; - } else - r = 1; - if (r) { - info->rcvsched = 0; - resched = 1; - } else - info->rcvsched = 1; - } - } + isdn_audio_eval_dtmf(info); + if ((info->vonline & 1) && (info->emu.vpar[1])) + isdn_audio_eval_silence(info); +#endif + tty = info->tty; + if (tty) { + if (info->mcr & UART_MCR_RTS) { + /* CISCO AsyncPPP Hack */ + if (!(info->emu.mdmreg[REG_CPPP] & BIT_CPPP)) + r = isdn_readbchan_tty(info->isdn_driver, info->isdn_channel, tty, 0); + else + r = isdn_readbchan_tty(info->isdn_driver, info->isdn_channel, tty, 1); + if (r) + tty_flip_buffer_push(tty); + } else + r = 1; + } else + r = 1; + if (r) { + info->rcvsched = 0; + resched = 1; + } else + info->rcvsched = 1; } if (!resched) isdn_timer_ctrl(ISDN_TIMER_MODEMREAD, 0); @@ -3769,19 +3778,19 @@ isdn_tty_modem_escape(void) 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); - } + 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); } @@ -3839,15 +3848,14 @@ isdn_tty_carrier_timeout(void) 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; - } + 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); } |