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