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[/] [or1k/] [trunk/] [rc203soc/] [sw/] [uClinux/] [drivers/] [isdn/] [sc/] [timer.c] - Rev 1765
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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(); }