1 /*********************************************************************
2 *
3 * Filename: timer.c
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: Wed Dec 8 12:50:34 1999
10 * Modified by: Dag Brattli <dagb@cs.uit.no>
11 *
12 * Copyright (c) 1997, 1999 Dag Brattli <dagb@cs.uit.no>,
13 * All Rights Reserved.
14 *
15 * This program is free software; you can redistribute it and/or
16 * modify it under the terms of the GNU General Public License as
17 * published by the Free Software Foundation; either version 2 of
18 * the License, or (at your option) any later version.
19 *
20 * Neither Dag Brattli nor University of Tromsų admit liability nor
21 * provide warranty for any of this software. This material is
22 * provided "AS-IS" and at no charge.
23 *
24 ********************************************************************/
25
26 #include <asm/system.h>
27 #include <linux/config.h>
28 #include <linux/delay.h>
29
30 #include <net/irda/timer.h>
31 #include <net/irda/irda.h>
32 #include <net/irda/irtty.h>
33 #include <net/irda/irlap.h>
34 #include <net/irda/irlmp_event.h>
35
36 static void irlap_slot_timer_expired(void* data);
37 static void irlap_query_timer_expired(void* data);
38 static void irlap_final_timer_expired(void* data);
39 static void irlap_wd_timer_expired(void* data);
40 static void irlap_backoff_timer_expired(void* data);
41
42 static void irlap_media_busy_expired(void* data);
43 /*
44 * Function irda_start_timer (timer, timeout)
45 *
46 * Start an IrDA timer
47 *
48 */
49 void irda_start_timer(struct timer_list *ptimer, int timeout, void *data,
50 TIMER_CALLBACK callback)
51 {
52 del_timer(ptimer);
53
54 ptimer->data = (unsigned long) data;
55
56 /*
57 * For most architectures void * is the same as unsigned long, but
58 * at least we try to use void * as long as possible. Since the
59 * timer functions use unsigned long, we cast the function here
60 */
61 ptimer->function = (void (*)(unsigned long)) callback;
62 ptimer->expires = jiffies + timeout;
63
64 add_timer(ptimer);
65 }
66
67 void irlap_start_slot_timer(struct irlap_cb *self, int timeout)
68 {
69 irda_start_timer(&self->slot_timer, timeout, (void *) self,
70 irlap_slot_timer_expired);
71 }
72
73 void irlap_start_query_timer(struct irlap_cb *self, int timeout)
74 {
75 irda_start_timer( &self->query_timer, timeout, (void *) self,
76 irlap_query_timer_expired);
77 }
78
79 void irlap_start_final_timer(struct irlap_cb *self, int timeout)
80 {
81 irda_start_timer(&self->final_timer, timeout, (void *) self,
82 irlap_final_timer_expired);
83 }
84
85 void irlap_start_wd_timer(struct irlap_cb *self, int timeout)
86 {
87 irda_start_timer(&self->wd_timer, timeout, (void *) self,
88 irlap_wd_timer_expired);
89 }
90
91 void irlap_start_backoff_timer(struct irlap_cb *self, int timeout)
92 {
93 irda_start_timer(&self->backoff_timer, timeout, (void *) self,
94 irlap_backoff_timer_expired);
95 }
96
97 void irlap_start_mbusy_timer(struct irlap_cb *self)
98 {
99 irda_start_timer(&self->media_busy_timer, MEDIABUSY_TIMEOUT,
100 (void *) self, irlap_media_busy_expired);
101 }
102
103 void irlap_stop_mbusy_timer(struct irlap_cb *self)
104 {
105 /* If timer is activated, kill it! */
106 if(timer_pending(&self->media_busy_timer))
107 del_timer(&self->media_busy_timer);
108
109 #ifdef CONFIG_IRDA_ULTRA
110 /* Send any pending Ultra frames if any */
111 if (!skb_queue_empty(&self->txq_ultra))
112 /* Note : we don't send the frame, just post an event.
113 * Frames will be sent only if we are in NDM mode (see
114 * irlap_event.c).
115 * Also, moved this code from irlap_media_busy_expired()
116 * to here to catch properly all cases...
117 * Jean II */
118 irlap_do_event(self, SEND_UI_FRAME, NULL, NULL);
119 #endif /* CONFIG_IRDA_ULTRA */
120 }
121
122 void irlmp_start_watchdog_timer(struct lsap_cb *self, int timeout)
123 {
124 irda_start_timer(&self->watchdog_timer, timeout, (void *) self,
125 irlmp_watchdog_timer_expired);
126 }
127
128 void irlmp_start_discovery_timer(struct irlmp_cb *self, int timeout)
129 {
130 irda_start_timer(&self->discovery_timer, timeout, (void *) self,
131 irlmp_discovery_timer_expired);
132 }
133
134 void irlmp_start_idle_timer(struct lap_cb *self, int timeout)
135 {
136 irda_start_timer(&self->idle_timer, timeout, (void *) self,
137 irlmp_idle_timer_expired);
138 }
139
140 void irlmp_stop_idle_timer(struct lap_cb *self)
141 {
142 /* If timer is activated, kill it! */
143 if(timer_pending(&self->idle_timer))
144 del_timer(&self->idle_timer);
145 }
146
147 /*
148 * Function irlap_slot_timer_expired (data)
149 *
150 * IrLAP slot timer has expired
151 *
152 */
153 static void irlap_slot_timer_expired(void *data)
154 {
155 struct irlap_cb *self = (struct irlap_cb *) data;
156
157 ASSERT(self != NULL, return;);
158 ASSERT(self->magic == LAP_MAGIC, return;);
159
160 irlap_do_event(self, SLOT_TIMER_EXPIRED, NULL, NULL);
161 }
162
163 /*
164 * Function irlap_query_timer_expired (data)
165 *
166 * IrLAP query timer has expired
167 *
168 */
169 static void irlap_query_timer_expired(void *data)
170 {
171 struct irlap_cb *self = (struct irlap_cb *) data;
172
173 ASSERT(self != NULL, return;);
174 ASSERT(self->magic == LAP_MAGIC, return;);
175
176 irlap_do_event(self, QUERY_TIMER_EXPIRED, NULL, NULL);
177 }
178
179 /*
180 * Function irda_final_timer_expired (data)
181 *
182 *
183 *
184 */
185 static void irlap_final_timer_expired(void *data)
186 {
187 struct irlap_cb *self = (struct irlap_cb *) data;
188
189 ASSERT(self != NULL, return;);
190 ASSERT(self->magic == LAP_MAGIC, return;);
191
192 irlap_do_event(self, FINAL_TIMER_EXPIRED, NULL, NULL);
193 }
194
195 /*
196 * Function irda_wd_timer_expired (data)
197 *
198 *
199 *
200 */
201 static void irlap_wd_timer_expired(void *data)
202 {
203 struct irlap_cb *self = (struct irlap_cb *) data;
204
205 ASSERT(self != NULL, return;);
206 ASSERT(self->magic == LAP_MAGIC, return;);
207
208 irlap_do_event(self, WD_TIMER_EXPIRED, NULL, NULL);
209 }
210
211 /*
212 * Function irda_backoff_timer_expired (data)
213 *
214 *
215 *
216 */
217 static void irlap_backoff_timer_expired(void *data)
218 {
219 struct irlap_cb *self = (struct irlap_cb *) data;
220
221 ASSERT(self != NULL, return;);
222 ASSERT(self->magic == LAP_MAGIC, return;);
223
224 irlap_do_event(self, BACKOFF_TIMER_EXPIRED, NULL, NULL);
225 }
226
227
228 /*
229 * Function irtty_media_busy_expired (data)
230 *
231 *
232 */
233 void irlap_media_busy_expired(void* data)
234 {
235 struct irlap_cb *self = (struct irlap_cb *) data;
236
237 ASSERT(self != NULL, return;);
238
239 irda_device_set_media_busy(self->netdev, FALSE);
240 /* Note : will deal with Ultra frames */
241 }
242
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