1 /* $Id: timer.c,v 1.3.6.1 2001/09/23 22:24:59 kai Exp $
3 * Copyright (C) 1996 SpellCaster Telecommunications Inc.
5 * This software may be used and distributed according to the terms
6 * of the GNU General Public License, incorporated herein by reference.
8 * For more information, please contact gpl-info@spellcast.com or write:
10 * SpellCaster Telecommunications Inc.
11 * 5621 Finch Avenue East, Unit #3
12 * Scarborough, Ontario Canada
15 * +1 (416) 297-6433 Facsimile
25 * Write the proper values into the I/O ports following a reset
27 static void setup_ports(int card)
30 outb((sc_adapter[card]->rambase >> 12), sc_adapter[card]->ioport[EXP_BASE]);
33 outb((sc_adapter[card]->interrupt | 0x80),
34 sc_adapter[card]->ioport[IRQ_SELECT]);
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.
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.
46 void sc_check_reset(unsigned long data)
50 int card = (unsigned int) data;
52 pr_debug("%s: check_timer timer called\n",
53 sc_adapter[card]->devicename);
55 /* Setup the io ports */
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));
63 /* check the signature */
64 if(sig == SIGNATURE) {
66 spin_unlock_irqrestore(&sc_adapter[card]->lock, flags);
67 /* See if we need to do a startproc */
68 if (sc_adapter[card]->StartOnReset)
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);
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.
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).
88 void check_phystat(unsigned long data)
91 int card = (unsigned int) data;
93 pr_debug("%s: Checking status...\n", sc_adapter[card]->devicename);
95 * check the results of the last PhyStat and change only if
96 * has changed drastically
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);
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);
109 indicate_status(card, ISDN_STAT_STOP, 0, NULL);
112 sc_adapter[card]->phystat = sc_adapter[card]->nphystat;
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);
119 /* Send a new cePhyStatus message */
120 sendmessage(card, CEPID,ceReqTypePhy,ceReqClass2,
121 ceReqPhyStatus,0,0,NULL);