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1da177e4 LT |
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 | extern board *sc_adapter[]; | |
24 | ||
25 | extern void flushreadfifo(int); | |
26 | extern int startproc(int); | |
27 | extern int indicate_status(int, int, unsigned long, char *); | |
28 | extern int sendmessage(int, unsigned int, unsigned int, unsigned int, | |
29 | unsigned int, unsigned int, unsigned int, unsigned int *); | |
30 | ||
31 | ||
32 | /* | |
33 | * Write the proper values into the I/O ports following a reset | |
34 | */ | |
e3ca5e76 | 35 | static void setup_ports(int card) |
1da177e4 LT |
36 | { |
37 | ||
38 | outb((sc_adapter[card]->rambase >> 12), sc_adapter[card]->ioport[EXP_BASE]); | |
39 | ||
40 | /* And the IRQ */ | |
41 | outb((sc_adapter[card]->interrupt | 0x80), | |
42 | sc_adapter[card]->ioport[IRQ_SELECT]); | |
43 | } | |
44 | ||
45 | /* | |
46 | * Timed function to check the status of a previous reset | |
47 | * Must be very fast as this function runs in the context of | |
48 | * an interrupt handler. | |
49 | * | |
50 | * Setup the ioports for the board that were cleared by the reset. | |
51 | * Then, check to see if the signate has been set. Next, set the | |
52 | * signature to a known value and issue a startproc if needed. | |
53 | */ | |
54 | void check_reset(unsigned long data) | |
55 | { | |
56 | unsigned long flags; | |
57 | unsigned long sig; | |
58 | int card = (unsigned int) data; | |
59 | ||
60 | pr_debug("%s: check_timer timer called\n", | |
61 | sc_adapter[card]->devicename); | |
62 | ||
63 | /* Setup the io ports */ | |
64 | setup_ports(card); | |
65 | ||
66 | spin_lock_irqsave(&sc_adapter[card]->lock, flags); | |
67 | outb(sc_adapter[card]->ioport[sc_adapter[card]->shmem_pgport], | |
68 | (sc_adapter[card]->shmem_magic>>14) | 0x80); | |
69 | sig = (unsigned long) *((unsigned long *)(sc_adapter[card]->rambase + SIG_OFFSET)); | |
70 | ||
71 | /* check the signature */ | |
72 | if(sig == SIGNATURE) { | |
73 | flushreadfifo(card); | |
74 | spin_unlock_irqrestore(&sc_adapter[card]->lock, flags); | |
75 | /* See if we need to do a startproc */ | |
76 | if (sc_adapter[card]->StartOnReset) | |
77 | startproc(card); | |
78 | } else { | |
79 | pr_debug("%s: No signature yet, waiting another %d jiffies.\n", | |
80 | sc_adapter[card]->devicename, CHECKRESET_TIME); | |
81 | mod_timer(&sc_adapter[card]->reset_timer, jiffies+CHECKRESET_TIME); | |
82 | spin_unlock_irqrestore(&sc_adapter[card]->lock, flags); | |
83 | } | |
84 | } | |
85 | ||
86 | /* | |
87 | * Timed function to check the status of a previous reset | |
88 | * Must be very fast as this function runs in the context of | |
89 | * an interrupt handler. | |
90 | * | |
91 | * Send check sc_adapter->phystat to see if the channels are up | |
92 | * If they are, tell ISDN4Linux that the board is up. If not, | |
93 | * tell IADN4Linux that it is up. Always reset the timer to | |
94 | * fire again (endless loop). | |
95 | */ | |
96 | void check_phystat(unsigned long data) | |
97 | { | |
98 | unsigned long flags; | |
99 | int card = (unsigned int) data; | |
100 | ||
101 | pr_debug("%s: Checking status...\n", sc_adapter[card]->devicename); | |
102 | /* | |
103 | * check the results of the last PhyStat and change only if | |
104 | * has changed drastically | |
105 | */ | |
106 | if (sc_adapter[card]->nphystat && !sc_adapter[card]->phystat) { /* All is well */ | |
107 | pr_debug("PhyStat transition to RUN\n"); | |
108 | pr_info("%s: Switch contacted, transmitter enabled\n", | |
109 | sc_adapter[card]->devicename); | |
110 | indicate_status(card, ISDN_STAT_RUN, 0, NULL); | |
111 | } | |
112 | else if (!sc_adapter[card]->nphystat && sc_adapter[card]->phystat) { /* All is not well */ | |
113 | pr_debug("PhyStat transition to STOP\n"); | |
114 | pr_info("%s: Switch connection lost, transmitter disabled\n", | |
115 | sc_adapter[card]->devicename); | |
116 | ||
117 | indicate_status(card, ISDN_STAT_STOP, 0, NULL); | |
118 | } | |
119 | ||
120 | sc_adapter[card]->phystat = sc_adapter[card]->nphystat; | |
121 | ||
122 | /* Reinitialize the timer */ | |
123 | spin_lock_irqsave(&sc_adapter[card]->lock, flags); | |
124 | mod_timer(&sc_adapter[card]->stat_timer, jiffies+CHECKSTAT_TIME); | |
125 | spin_unlock_irqrestore(&sc_adapter[card]->lock, flags); | |
126 | ||
127 | /* Send a new cePhyStatus message */ | |
128 | sendmessage(card, CEPID,ceReqTypePhy,ceReqClass2, | |
129 | ceReqPhyStatus,0,0,NULL); | |
130 | } | |
131 |