1/* $Id: timer.c,v 1.1.1.1 2008/10/15 03:26:34 james26_jang 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#define __NO_VERSION__
19#include "includes.h"
20#include "hardware.h"
21#include "message.h"
22#include "card.h"
23
24extern board *adapter[];
25
26extern void flushreadfifo(int);
27extern int  startproc(int);
28extern int  indicate_status(int, int, unsigned long, char *);
29extern int  sendmessage(int, unsigned int, unsigned int, unsigned int,
30        unsigned int, unsigned int, unsigned int, unsigned int *);
31
32
33/*
34 * Write the proper values into the I/O ports following a reset
35 */
36void setup_ports(int card)
37{
38
39	outb((adapter[card]->rambase >> 12), adapter[card]->ioport[EXP_BASE]);
40
41	/* And the IRQ */
42	outb((adapter[card]->interrupt | 0x80),
43		adapter[card]->ioport[IRQ_SELECT]);
44}
45
46/*
47 * Timed function to check the status of a previous reset
48 * Must be very fast as this function runs in the context of
49 * an interrupt handler.
50 *
51 * Setup the ioports for the board that were cleared by the reset.
52 * Then, check to see if the signate has been set. Next, set the
53 * signature to a known value and issue a startproc if needed.
54 */
55void check_reset(unsigned long data)
56{
57	unsigned long flags;
58	unsigned long sig;
59	int card = (unsigned int) data;
60
61	pr_debug("%s: check_timer timer called\n", adapter[card]->devicename);
62
63	/* Setup the io ports */
64	setup_ports(card);
65
66  	save_flags(flags);
67	cli();
68	outb(adapter[card]->ioport[adapter[card]->shmem_pgport],
69		(adapter[card]->shmem_magic>>14) | 0x80);
70	sig = (unsigned long) *((unsigned long *)(adapter[card]->rambase + SIG_OFFSET));
71
72	/* check the signature */
73	if(sig == SIGNATURE) {
74		flushreadfifo(card);
75		restore_flags(flags);
76		/* See if we need to do a startproc */
77		if (adapter[card]->StartOnReset)
78			startproc(card);
79	}
80	else  {
81		pr_debug("%s: No signature yet, waiting another %d jiffies.\n",
82			adapter[card]->devicename, CHECKRESET_TIME);
83		mod_timer(&adapter[card]->reset_timer, jiffies+CHECKRESET_TIME);
84	}
85	restore_flags(flags);
86
87}
88
89/*
90 * Timed function to check the status of a previous reset
91 * Must be very fast as this function runs in the context of
92 * an interrupt handler.
93 *
94 * Send check adapter->phystat to see if the channels are up
95 * If they are, tell ISDN4Linux that the board is up. If not,
96 * tell IADN4Linux that it is up. Always reset the timer to
97 * fire again (endless loop).
98 */
99void check_phystat(unsigned long data)
100{
101	unsigned long flags;
102	int card = (unsigned int) data;
103
104	pr_debug("%s: Checking status...\n", adapter[card]->devicename);
105	/*
106	 * check the results of the last PhyStat and change only if
107	 * has changed drastically
108	 */
109	if (adapter[card]->nphystat && !adapter[card]->phystat) {   /* All is well */
110		pr_debug("PhyStat transition to RUN\n");
111		pr_info("%s: Switch contacted, transmitter enabled\n",
112			adapter[card]->devicename);
113		indicate_status(card, ISDN_STAT_RUN, 0, NULL);
114	}
115	else if (!adapter[card]->nphystat && adapter[card]->phystat) {   /* All is not well */
116		pr_debug("PhyStat transition to STOP\n");
117		pr_info("%s: Switch connection lost, transmitter disabled\n",
118			adapter[card]->devicename);
119
120		indicate_status(card, ISDN_STAT_STOP, 0, NULL);
121	}
122
123	adapter[card]->phystat = adapter[card]->nphystat;
124
125	/* Reinitialize the timer */
126	save_flags(flags);
127	cli();
128	mod_timer(&adapter[card]->stat_timer, jiffies+CHECKSTAT_TIME);
129	restore_flags(flags);
130
131	/* Send a new cePhyStatus message */
132	sendmessage(card, CEPID,ceReqTypePhy,ceReqClass2,
133		ceReqPhyStatus,0,0,NULL);
134}
135
136/*
137 * When in trace mode, this callback is used to swap the working shared
138 * RAM page to the trace page(s) and process all received messages. It
139 * must be called often enough to get all of the messages out of RAM before
140 * it loops around.
141 * Trace messages are \n terminated strings.
142 * We output the messages in 64 byte chunks through readstat. Each chunk
143 * is scanned for a \n followed by a time stamp. If the timerstamp is older
144 * than the current time, scanning stops and the page and offset are recorded
145 * as the starting point the next time the trace timer is called. The final
146 * step is to restore the working page and reset the timer.
147 */
148void trace_timer(unsigned long data)
149{
150	unsigned long flags;
151
152	/*
153	 * Disable interrupts and swap the first page
154	 */
155	save_flags(flags);
156	cli();
157}
158