Merge branch 'drm-patches' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied...
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / net / irda / timer.c
blob0e17f976add69990b8ad346312b9f30133b257bb
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>
12 * Copyright (c) 1997, 1999 Dag Brattli <dagb@cs.uit.no>,
13 * All Rights Reserved.
14 * Copyright (c) 2000-2002 Jean Tourrilhes <jt@hpl.hp.com>
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.
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.
25 ********************************************************************/
27 #include <asm/system.h>
28 #include <linux/config.h>
29 #include <linux/delay.h>
31 #include <net/irda/timer.h>
32 #include <net/irda/irda.h>
33 #include <net/irda/irda_device.h>
34 #include <net/irda/irlap.h>
35 #include <net/irda/irlmp.h>
37 extern int sysctl_slot_timeout;
39 static void irlap_slot_timer_expired(void* data);
40 static void irlap_query_timer_expired(void* data);
41 static void irlap_final_timer_expired(void* data);
42 static void irlap_wd_timer_expired(void* data);
43 static void irlap_backoff_timer_expired(void* data);
44 static void irlap_media_busy_expired(void* data);
46 void irlap_start_slot_timer(struct irlap_cb *self, int timeout)
48 irda_start_timer(&self->slot_timer, timeout, (void *) self,
49 irlap_slot_timer_expired);
52 void irlap_start_query_timer(struct irlap_cb *self, int S, int s)
54 int timeout;
56 /* Calculate when the peer discovery should end. Normally, we
57 * get the end-of-discovery frame, so this is just in case
58 * we miss it.
59 * Basically, we multiply the number of remaining slots by our
60 * slot time, plus add some extra time to properly receive the last
61 * discovery packet (which is longer due to extra discovery info),
62 * to avoid messing with for incomming connections requests and
63 * to accomodate devices that perform discovery slower than us.
64 * Jean II */
65 timeout = ((sysctl_slot_timeout * HZ / 1000) * (S - s)
66 + XIDEXTRA_TIMEOUT + SMALLBUSY_TIMEOUT);
68 /* Set or re-set the timer. We reset the timer for each received
69 * discovery query, which allow us to automatically adjust to
70 * the speed of the peer discovery (faster or slower). Jean II */
71 irda_start_timer( &self->query_timer, timeout, (void *) self,
72 irlap_query_timer_expired);
75 void irlap_start_final_timer(struct irlap_cb *self, int timeout)
77 irda_start_timer(&self->final_timer, timeout, (void *) self,
78 irlap_final_timer_expired);
81 void irlap_start_wd_timer(struct irlap_cb *self, int timeout)
83 irda_start_timer(&self->wd_timer, timeout, (void *) self,
84 irlap_wd_timer_expired);
87 void irlap_start_backoff_timer(struct irlap_cb *self, int timeout)
89 irda_start_timer(&self->backoff_timer, timeout, (void *) self,
90 irlap_backoff_timer_expired);
93 void irlap_start_mbusy_timer(struct irlap_cb *self, int timeout)
95 irda_start_timer(&self->media_busy_timer, timeout,
96 (void *) self, irlap_media_busy_expired);
99 void irlap_stop_mbusy_timer(struct irlap_cb *self)
101 /* If timer is activated, kill it! */
102 del_timer(&self->media_busy_timer);
104 /* If we are in NDM, there is a bunch of events in LAP that
105 * that be pending due to the media_busy condition, such as
106 * CONNECT_REQUEST and SEND_UI_FRAME. If we don't generate
107 * an event, they will wait forever...
108 * Jean II */
109 if (self->state == LAP_NDM)
110 irlap_do_event(self, MEDIA_BUSY_TIMER_EXPIRED, NULL, NULL);
113 void irlmp_start_watchdog_timer(struct lsap_cb *self, int timeout)
115 irda_start_timer(&self->watchdog_timer, timeout, (void *) self,
116 irlmp_watchdog_timer_expired);
119 void irlmp_start_discovery_timer(struct irlmp_cb *self, int timeout)
121 irda_start_timer(&self->discovery_timer, timeout, (void *) self,
122 irlmp_discovery_timer_expired);
125 void irlmp_start_idle_timer(struct lap_cb *self, int timeout)
127 irda_start_timer(&self->idle_timer, timeout, (void *) self,
128 irlmp_idle_timer_expired);
131 void irlmp_stop_idle_timer(struct lap_cb *self)
133 /* If timer is activated, kill it! */
134 del_timer(&self->idle_timer);
138 * Function irlap_slot_timer_expired (data)
140 * IrLAP slot timer has expired
143 static void irlap_slot_timer_expired(void *data)
145 struct irlap_cb *self = (struct irlap_cb *) data;
147 IRDA_ASSERT(self != NULL, return;);
148 IRDA_ASSERT(self->magic == LAP_MAGIC, return;);
150 irlap_do_event(self, SLOT_TIMER_EXPIRED, NULL, NULL);
154 * Function irlap_query_timer_expired (data)
156 * IrLAP query timer has expired
159 static void irlap_query_timer_expired(void *data)
161 struct irlap_cb *self = (struct irlap_cb *) data;
163 IRDA_ASSERT(self != NULL, return;);
164 IRDA_ASSERT(self->magic == LAP_MAGIC, return;);
166 irlap_do_event(self, QUERY_TIMER_EXPIRED, NULL, NULL);
170 * Function irda_final_timer_expired (data)
175 static void irlap_final_timer_expired(void *data)
177 struct irlap_cb *self = (struct irlap_cb *) data;
179 IRDA_ASSERT(self != NULL, return;);
180 IRDA_ASSERT(self->magic == LAP_MAGIC, return;);
182 irlap_do_event(self, FINAL_TIMER_EXPIRED, NULL, NULL);
186 * Function irda_wd_timer_expired (data)
191 static void irlap_wd_timer_expired(void *data)
193 struct irlap_cb *self = (struct irlap_cb *) data;
195 IRDA_ASSERT(self != NULL, return;);
196 IRDA_ASSERT(self->magic == LAP_MAGIC, return;);
198 irlap_do_event(self, WD_TIMER_EXPIRED, NULL, NULL);
202 * Function irda_backoff_timer_expired (data)
207 static void irlap_backoff_timer_expired(void *data)
209 struct irlap_cb *self = (struct irlap_cb *) data;
211 IRDA_ASSERT(self != NULL, return;);
212 IRDA_ASSERT(self->magic == LAP_MAGIC, return;);
214 irlap_do_event(self, BACKOFF_TIMER_EXPIRED, NULL, NULL);
219 * Function irtty_media_busy_expired (data)
223 void irlap_media_busy_expired(void* data)
225 struct irlap_cb *self = (struct irlap_cb *) data;
227 IRDA_ASSERT(self != NULL, return;);
229 irda_device_set_media_busy(self->netdev, FALSE);
230 /* Note : the LAP event will be send in irlap_stop_mbusy_timer(),
231 * to catch other cases where the flag is cleared (for example
232 * after a discovery) - Jean II */