1/* $Id: timer.c,v 1.3.6.1 2001/09/23 22:24:59 kai Exp $
  2 *
  3 * Copyright (C) 1996  SpellCaster Telecommunications Inc.
  4 *
  5 * This software may be used and distributed according to the terms
  6 * of the GNU General Public License, incorporated herein by reference.
  7 *
  8 * For more information, please contact gpl-info@spellcast.com or write:
  9 *
 10 *     SpellCaster Telecommunications Inc.
 11 *     5621 Finch Avenue East, Unit #3
 12 *     Scarborough, Ontario  Canada
 13 *     M1B 2T9
 14 *     +1 (416) 297-8565
 15 *     +1 (416) 297-6433 Facsimile
 16 */
 17
 18#include "includes.h"
 19#include "hardware.h"
 20#include "message.h"
 21#include "card.h"
 22
 23
 24/*
 25 * Write the proper values into the I/O ports following a reset
 26 */
 27static void setup_ports(int card)
 28{
 29
 30	outb((sc_adapter[card]->rambase >> 12), sc_adapter[card]->ioport[EXP_BASE]);
 31
 32	/* And the IRQ */
 33	outb((sc_adapter[card]->interrupt | 0x80),
 34		sc_adapter[card]->ioport[IRQ_SELECT]);
 35}
 36
 37/*
 38 * Timed function to check the status of a previous reset
 39 * Must be very fast as this function runs in the context of
 40 * an interrupt handler.
 41 *
 42 * Setup the ioports for the board that were cleared by the reset.
 43 * Then, check to see if the signate has been set. Next, set the
 44 * signature to a known value and issue a startproc if needed.
 45 */
 46void sc_check_reset(unsigned long data)
 47{
 48	unsigned long flags;
 49	unsigned long sig;
 50	int card = (unsigned int) data;
 51
 52	pr_debug("%s: check_timer timer called\n",
 53		sc_adapter[card]->devicename);
 54
 55	/* Setup the io ports */
 56	setup_ports(card);
 57
 58	spin_lock_irqsave(&sc_adapter[card]->lock, flags);
 59	outb(sc_adapter[card]->ioport[sc_adapter[card]->shmem_pgport],
 60		(sc_adapter[card]->shmem_magic>>14) | 0x80);
 61	sig = (unsigned long) *((unsigned long *)(sc_adapter[card]->rambase + SIG_OFFSET));
 62
 63	/* check the signature */
 64	if(sig == SIGNATURE) {
 65		flushreadfifo(card);
 66		spin_unlock_irqrestore(&sc_adapter[card]->lock, flags);
 67		/* See if we need to do a startproc */
 68		if (sc_adapter[card]->StartOnReset)
 69			startproc(card);
 70	} else  {
 71		pr_debug("%s: No signature yet, waiting another %lu jiffies.\n",
 72			sc_adapter[card]->devicename, CHECKRESET_TIME);
 73		mod_timer(&sc_adapter[card]->reset_timer, jiffies+CHECKRESET_TIME);
 74		spin_unlock_irqrestore(&sc_adapter[card]->lock, flags);
 75	}
 76}
 77
 78/*
 79 * Timed function to check the status of a previous reset
 80 * Must be very fast as this function runs in the context of
 81 * an interrupt handler.
 82 *
 83 * Send check sc_adapter->phystat to see if the channels are up
 84 * If they are, tell ISDN4Linux that the board is up. If not,
 85 * tell IADN4Linux that it is up. Always reset the timer to
 86 * fire again (endless loop).
 87 */
 88void check_phystat(unsigned long data)
 89{
 90	unsigned long flags;
 91	int card = (unsigned int) data;
 92
 93	pr_debug("%s: Checking status...\n", sc_adapter[card]->devicename);
 94	/* 
 95	 * check the results of the last PhyStat and change only if
 96	 * has changed drastically
 97	 */
 98	if (sc_adapter[card]->nphystat && !sc_adapter[card]->phystat) {   /* All is well */
 99		pr_debug("PhyStat transition to RUN\n");
100		pr_info("%s: Switch contacted, transmitter enabled\n", 
101			sc_adapter[card]->devicename);
102		indicate_status(card, ISDN_STAT_RUN, 0, NULL);
103	}
104	else if (!sc_adapter[card]->nphystat && sc_adapter[card]->phystat) {   /* All is not well */
105		pr_debug("PhyStat transition to STOP\n");
106		pr_info("%s: Switch connection lost, transmitter disabled\n", 
107			sc_adapter[card]->devicename);
108
109		indicate_status(card, ISDN_STAT_STOP, 0, NULL);
110	}
111
112	sc_adapter[card]->phystat = sc_adapter[card]->nphystat;
113
114	/* Reinitialize the timer */
115	spin_lock_irqsave(&sc_adapter[card]->lock, flags);
116	mod_timer(&sc_adapter[card]->stat_timer, jiffies+CHECKSTAT_TIME);
117	spin_unlock_irqrestore(&sc_adapter[card]->lock, flags);
118
119	/* Send a new cePhyStatus message */
120	sendmessage(card, CEPID,ceReqTypePhy,ceReqClass2,
121		ceReqPhyStatus,0,0,NULL);
122}
123