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/*

 *  $Id: timer.c,v 1.1 2005-12-20 10:17:12 jcastillo Exp $

 *  Copyright (C) 1996  SpellCaster Telecommunications Inc.

 *

 *  This program is free software; you can redistribute it and/or modify

 *  it under the terms of the GNU General Public License as published by

 *  the Free Software Foundation; either version 2 of the License, or

 *  (at your option) any later version.

 *

 *  This program is distributed in the hope that it will be useful,

 *  but WITHOUT ANY WARRANTY; without even the implied warranty of

 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 *  GNU General Public License for more details.

 *

 *  You should have received a copy of the GNU General Public License

 *  along with this program; if not, write to the Free Software

 *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

 *

 *  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

 */

#define __NO_VERSION__

#include "includes.h"

#include "hardware.h"

#include "message.h"

#include "card.h"

extern board *adapter[];

extern void flushreadfifo(int);

extern int  startproc(int);

extern int  indicate_status(int, int, unsigned long, char *);

extern int  sendmessage(int, unsigned int, unsigned int, unsigned int,

        unsigned int, unsigned int, unsigned int, unsigned int *);

/*

 * Write the proper values into the I/O ports following a reset

 */

void setup_ports(int card)

{

        outb((adapter[card]->rambase >> 12), adapter[card]->ioport[EXP_BASE]);

        /* And the IRQ */

        outb((adapter[card]->interrupt | 0x80),

                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 check_reset(unsigned long data)

{

        unsigned long flags;

        unsigned long sig;

        int card = (unsigned int) data;

        pr_debug("%s: check_timer timer called\n", adapter[card]->devicename);

        /* Setup the io ports */

        setup_ports(card);

        save_flags(flags);

        cli();

        outb(adapter[card]->ioport[adapter[card]->shmem_pgport],

                (adapter[card]->shmem_magic>>14) | 0x80);

        sig = (unsigned long) *((unsigned long *)(adapter[card]->rambase + SIG_OFFSET));

        /* check the signature */

        if(sig == SIGNATURE) {

                flushreadfifo(card);

                restore_flags(flags);

                /* See if we need to do a startproc */

                if (adapter[card]->StartOnReset)

                        startproc(card);

        }

        else  {

                pr_debug("%s: No signature yet, waiting another %d jiffies.\n",

                        adapter[card]->devicename, CHECKRESET_TIME);

                del_timer(&adapter[card]->reset_timer);

                adapter[card]->reset_timer.expires = jiffies + CHECKRESET_TIME;

                add_timer(&adapter[card]->reset_timer);

        }

        restore_flags(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 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", adapter[card]->devicename);

        /*

         * check the results of the last PhyStat and change only if

         * has changed drastically

         */

        if (adapter[card]->nphystat && !adapter[card]->phystat) {   /* All is well */

                pr_debug("PhyStat transition to RUN\n");

                pr_info("%s: Switch contacted, transmitter enabled\n",

                        adapter[card]->devicename);

                indicate_status(card, ISDN_STAT_RUN, 0, NULL);

        }

        else if (!adapter[card]->nphystat && adapter[card]->phystat) {   /* All is not well */

                pr_debug("PhyStat transition to STOP\n");

                pr_info("%s: Switch connection lost, transmitter disabled\n",

                        adapter[card]->devicename);

                indicate_status(card, ISDN_STAT_STOP, 0, NULL);

        }

        adapter[card]->phystat = adapter[card]->nphystat;

        /* Reinitialize the timer */

        save_flags(flags);

        cli();

        del_timer(&adapter[card]->stat_timer);

        adapter[card]->stat_timer.expires = jiffies + CHECKSTAT_TIME;

        add_timer(&adapter[card]->stat_timer);

        restore_flags(flags);

        /* Send a new cePhyStatus message */

        sendmessage(card, CEPID,ceReqTypePhy,ceReqClass2,

                ceReqPhyStatus,0,0,NULL);

}

/*

 * When in trace mode, this callback is used to swap the working shared

 * RAM page to the trace page(s) and process all received messages. It

 * must be called often enough to get all of the messages out of RAM before

 * it loops around.

 * Trace messages are \n terminated strings.

 * We output the messages in 64 byte chunks through readstat. Each chunk

 * is scanned for a \n followed by a time stamp. If the timerstamp is older

 * than the current time, scanning stops and the page and offset are recorded

 * as the starting point the next time the trace timer is called. The final

 * step is to restore the working page and reset the timer.

 */

void trace_timer(unsigned long data)

{

        unsigned long flags;

        /*

         * Disable interrupts and swap the first page

         */

        save_flags(flags);

        cli();

}