1 /*********************************************************************
2 *
3 * Filename: timer.h
4 * Version:
5 * Description:
6 * Status: Experimental.
7 * Author: Dag Brattli <dagb@cs.uit.no>
8 * Created at: Sat Aug 16 00:59:29 1997
9 * Modified at: Thu Oct 7 12:25:24 1999
10 * Modified by: Dag Brattli <dagb@cs.uit.no>
11 *
12 * Copyright (c) 1997, 1998-1999 Dag Brattli <dagb@cs.uit.no>,
13 * All Rights Reserved.
14 * Copyright (c) 2000-2002 Jean Tourrilhes <jt@hpl.hp.com>
15 *
16 * This program is free software; you can redistribute it and/or
17 * modify it under the terms of the GNU General Public License as
18 * published by the Free Software Foundation; either version 2 of
19 * the License, or (at your option) any later version.
20 *
21 * Neither Dag Brattli nor University of Tromsø admit liability nor
22 * provide warranty for any of this software. This material is
23 * provided "AS-IS" and at no charge.
24 *
25 ********************************************************************/
26
27 #ifndef TIMER_H
28 #define TIMER_H
29
30 #include <linux/timer.h>
31 #include <linux/jiffies.h>
32
33 #include <asm/param.h> /* for HZ */
34
35 #include <net/irda/irda.h>
36
37 /* A few forward declarations (to make compiler happy) */
38 struct irlmp_cb;
39 struct irlap_cb;
40 struct lsap_cb;
41 struct lap_cb;
42
43 /*
44 * Timeout definitions, some defined in IrLAP 6.13.5 - p. 92
45 */
46 #define POLL_TIMEOUT (450*HZ/1000) /* Must never exceed 500 ms */
47 #define FINAL_TIMEOUT (500*HZ/1000) /* Must never exceed 500 ms */
48
49 /*
50 * Normally twice of p-timer. Note 3, IrLAP 6.3.11.2 - p. 60 suggests
51 * at least twice duration of the P-timer.
52 */
53 #define WD_TIMEOUT (POLL_TIMEOUT*2)
54
55 #define MEDIABUSY_TIMEOUT (500*HZ/1000) /* 500 msec */
56 #define SMALLBUSY_TIMEOUT (100*HZ/1000) /* 100 msec - IrLAP 6.13.4 */
57
58 /*
59 * Slot timer must never exceed 85 ms, and must always be at least 25 ms,
60 * suggested to 75-85 msec by IrDA lite. This doesn't work with a lot of
61 * devices, and other stackes uses a lot more, so it's best we do it as well
62 * (Note : this is the default value and sysctl overides it - Jean II)
63 */
64 #define SLOT_TIMEOUT (90*HZ/1000)
65
66 /*
67 * The latest discovery frame (XID) is longer due to the extra discovery
68 * information (hints, device name...). This is its extra length.
69 * We use that when setting the query timeout. Jean II
70 */
71 #define XIDEXTRA_TIMEOUT (34*HZ/1000) /* 34 msec */
72
73 #define WATCHDOG_TIMEOUT (20*HZ) /* 20 sec */
74
75 typedef void (*TIMER_CALLBACK)(void *);
76
77 static inline void irda_start_timer(struct timer_list *ptimer, int timeout,
78 void* data, TIMER_CALLBACK callback)
79 {
80 ptimer->function = (void (*)(unsigned long)) callback;
81 ptimer->data = (unsigned long) data;
82
83 /* Set new value for timer (update or add timer).
84 * We use mod_timer() because it's more efficient and also
85 * safer with respect to race conditions - Jean II */
86 mod_timer(ptimer, jiffies + timeout);
87 }
88
89
90 void irlap_start_slot_timer(struct irlap_cb *self, int timeout);
91 void irlap_start_query_timer(struct irlap_cb *self, int S, int s);
92 void irlap_start_final_timer(struct irlap_cb *self, int timeout);
93 void irlap_start_wd_timer(struct irlap_cb *self, int timeout);
94 void irlap_start_backoff_timer(struct irlap_cb *self, int timeout);
95
96 void irlap_start_mbusy_timer(struct irlap_cb *self, int timeout);
97 void irlap_stop_mbusy_timer(struct irlap_cb *);
98
99 void irlmp_start_watchdog_timer(struct lsap_cb *, int timeout);
100 void irlmp_start_discovery_timer(struct irlmp_cb *, int timeout);
101 void irlmp_start_idle_timer(struct lap_cb *, int timeout);
102 void irlmp_stop_idle_timer(struct lap_cb *self);
103
104 #endif
105
106
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