diff options
Diffstat (limited to 'kernel/drivers/isdn/sc/timer.c')
| -rw-r--r-- | kernel/drivers/isdn/sc/timer.c | 122 |
1 files changed, 122 insertions, 0 deletions
diff --git a/kernel/drivers/isdn/sc/timer.c b/kernel/drivers/isdn/sc/timer.c new file mode 100644 index 000000000..6fbac2230 --- /dev/null +++ b/kernel/drivers/isdn/sc/timer.c @@ -0,0 +1,122 @@ +/* $Id: timer.c,v 1.3.6.1 2001/09/23 22:24:59 kai Exp $ + * + * Copyright (C) 1996 SpellCaster Telecommunications Inc. + * + * This software may be used and distributed according to the terms + * of the GNU General Public License, incorporated herein by reference. + * + * For more information, please contact gpl-info@spellcast.com or write: + * + * SpellCaster Telecommunications Inc. + * 5621 Finch Avenue East, Unit #3 + * Scarborough, Ontario Canada + * M1B 2T9 + * +1 (416) 297-8565 + * +1 (416) 297-6433 Facsimile + */ + +#include "includes.h" +#include "hardware.h" +#include "message.h" +#include "card.h" + + +/* + * Write the proper values into the I/O ports following a reset + */ +static void setup_ports(int card) +{ + + outb((sc_adapter[card]->rambase >> 12), sc_adapter[card]->ioport[EXP_BASE]); + + /* And the IRQ */ + outb((sc_adapter[card]->interrupt | 0x80), + sc_adapter[card]->ioport[IRQ_SELECT]); +} + +/* + * Timed function to check the status of a previous reset + * Must be very fast as this function runs in the context of + * an interrupt handler. + * + * Setup the ioports for the board that were cleared by the reset. + * Then, check to see if the signate has been set. Next, set the + * signature to a known value and issue a startproc if needed. + */ +void sc_check_reset(unsigned long data) +{ + unsigned long flags; + unsigned long sig; + int card = (unsigned int) data; + + pr_debug("%s: check_timer timer called\n", + sc_adapter[card]->devicename); + + /* Setup the io ports */ + setup_ports(card); + + spin_lock_irqsave(&sc_adapter[card]->lock, flags); + outb(sc_adapter[card]->ioport[sc_adapter[card]->shmem_pgport], + (sc_adapter[card]->shmem_magic >> 14) | 0x80); + sig = (unsigned long) *((unsigned long *)(sc_adapter[card]->rambase + SIG_OFFSET)); + + /* check the signature */ + if (sig == SIGNATURE) { + flushreadfifo(card); + spin_unlock_irqrestore(&sc_adapter[card]->lock, flags); + /* See if we need to do a startproc */ + if (sc_adapter[card]->StartOnReset) + startproc(card); + } else { + pr_debug("%s: No signature yet, waiting another %lu jiffies.\n", + sc_adapter[card]->devicename, CHECKRESET_TIME); + mod_timer(&sc_adapter[card]->reset_timer, jiffies + CHECKRESET_TIME); + spin_unlock_irqrestore(&sc_adapter[card]->lock, flags); + } +} + +/* + * Timed function to check the status of a previous reset + * Must be very fast as this function runs in the context of + * an interrupt handler. + * + * Send check sc_adapter->phystat to see if the channels are up + * If they are, tell ISDN4Linux that the board is up. If not, + * tell IADN4Linux that it is up. Always reset the timer to + * fire again (endless loop). + */ +void check_phystat(unsigned long data) +{ + unsigned long flags; + int card = (unsigned int) data; + + pr_debug("%s: Checking status...\n", sc_adapter[card]->devicename); + /* + * check the results of the last PhyStat and change only if + * has changed drastically + */ + if (sc_adapter[card]->nphystat && !sc_adapter[card]->phystat) { /* All is well */ + pr_debug("PhyStat transition to RUN\n"); + pr_info("%s: Switch contacted, transmitter enabled\n", + sc_adapter[card]->devicename); + indicate_status(card, ISDN_STAT_RUN, 0, NULL); + } + else if (!sc_adapter[card]->nphystat && sc_adapter[card]->phystat) { /* All is not well */ + pr_debug("PhyStat transition to STOP\n"); + pr_info("%s: Switch connection lost, transmitter disabled\n", + sc_adapter[card]->devicename); + + indicate_status(card, ISDN_STAT_STOP, 0, NULL); + } + + sc_adapter[card]->phystat = sc_adapter[card]->nphystat; + + /* Reinitialize the timer */ + spin_lock_irqsave(&sc_adapter[card]->lock, flags); + mod_timer(&sc_adapter[card]->stat_timer, jiffies + CHECKSTAT_TIME); + spin_unlock_irqrestore(&sc_adapter[card]->lock, flags); + + /* Send a new cePhyStatus message */ + sendmessage(card, CEPID, ceReqTypePhy, ceReqClass2, + ceReqPhyStatus, 0, 0, NULL); +} |