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