TTY: add tty_port_tty_hangup helper
[linux-3.10.git] / net / irda / timer.c
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  *     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 #include <linux/delay.h>
28
29 #include <net/irda/timer.h>
30 #include <net/irda/irda.h>
31 #include <net/irda/irda_device.h>
32 #include <net/irda/irlap.h>
33 #include <net/irda/irlmp.h>
34
35 extern int  sysctl_slot_timeout;
36
37 static void irlap_slot_timer_expired(void* data);
38 static void irlap_query_timer_expired(void* data);
39 static void irlap_final_timer_expired(void* data);
40 static void irlap_wd_timer_expired(void* data);
41 static void irlap_backoff_timer_expired(void* data);
42 static void irlap_media_busy_expired(void* data);
43
44 void irlap_start_slot_timer(struct irlap_cb *self, int timeout)
45 {
46         irda_start_timer(&self->slot_timer, timeout, (void *) self,
47                          irlap_slot_timer_expired);
48 }
49
50 void irlap_start_query_timer(struct irlap_cb *self, int S, int s)
51 {
52         int timeout;
53
54         /* Calculate when the peer discovery should end. Normally, we
55          * get the end-of-discovery frame, so this is just in case
56          * we miss it.
57          * Basically, we multiply the number of remaining slots by our
58          * slot time, plus add some extra time to properly receive the last
59          * discovery packet (which is longer due to extra discovery info),
60          * to avoid messing with for incoming connections requests and
61          * to accommodate devices that perform discovery slower than us.
62          * Jean II */
63         timeout = ((sysctl_slot_timeout * HZ / 1000) * (S - s)
64                    + XIDEXTRA_TIMEOUT + SMALLBUSY_TIMEOUT);
65
66         /* Set or re-set the timer. We reset the timer for each received
67          * discovery query, which allow us to automatically adjust to
68          * the speed of the peer discovery (faster or slower). Jean II */
69         irda_start_timer( &self->query_timer, timeout, (void *) self,
70                           irlap_query_timer_expired);
71 }
72
73 void irlap_start_final_timer(struct irlap_cb *self, int timeout)
74 {
75         irda_start_timer(&self->final_timer, timeout, (void *) self,
76                          irlap_final_timer_expired);
77 }
78
79 void irlap_start_wd_timer(struct irlap_cb *self, int timeout)
80 {
81         irda_start_timer(&self->wd_timer, timeout, (void *) self,
82                          irlap_wd_timer_expired);
83 }
84
85 void irlap_start_backoff_timer(struct irlap_cb *self, int timeout)
86 {
87         irda_start_timer(&self->backoff_timer, timeout, (void *) self,
88                          irlap_backoff_timer_expired);
89 }
90
91 void irlap_start_mbusy_timer(struct irlap_cb *self, int timeout)
92 {
93         irda_start_timer(&self->media_busy_timer, timeout,
94                          (void *) self, irlap_media_busy_expired);
95 }
96
97 void irlap_stop_mbusy_timer(struct irlap_cb *self)
98 {
99         /* If timer is activated, kill it! */
100         del_timer(&self->media_busy_timer);
101
102         /* If we are in NDM, there is a bunch of events in LAP that
103          * that be pending due to the media_busy condition, such as
104          * CONNECT_REQUEST and SEND_UI_FRAME. If we don't generate
105          * an event, they will wait forever...
106          * Jean II */
107         if (self->state == LAP_NDM)
108                 irlap_do_event(self, MEDIA_BUSY_TIMER_EXPIRED, NULL, NULL);
109 }
110
111 void irlmp_start_watchdog_timer(struct lsap_cb *self, int timeout)
112 {
113         irda_start_timer(&self->watchdog_timer, timeout, (void *) self,
114                          irlmp_watchdog_timer_expired);
115 }
116
117 void irlmp_start_discovery_timer(struct irlmp_cb *self, int timeout)
118 {
119         irda_start_timer(&self->discovery_timer, timeout, (void *) self,
120                          irlmp_discovery_timer_expired);
121 }
122
123 void irlmp_start_idle_timer(struct lap_cb *self, int timeout)
124 {
125         irda_start_timer(&self->idle_timer, timeout, (void *) self,
126                          irlmp_idle_timer_expired);
127 }
128
129 void irlmp_stop_idle_timer(struct lap_cb *self)
130 {
131         /* If timer is activated, kill it! */
132         del_timer(&self->idle_timer);
133 }
134
135 /*
136  * Function irlap_slot_timer_expired (data)
137  *
138  *    IrLAP slot timer has expired
139  *
140  */
141 static void irlap_slot_timer_expired(void *data)
142 {
143         struct irlap_cb *self = (struct irlap_cb *) data;
144
145         IRDA_ASSERT(self != NULL, return;);
146         IRDA_ASSERT(self->magic == LAP_MAGIC, return;);
147
148         irlap_do_event(self, SLOT_TIMER_EXPIRED, NULL, NULL);
149 }
150
151 /*
152  * Function irlap_query_timer_expired (data)
153  *
154  *    IrLAP query timer has expired
155  *
156  */
157 static void irlap_query_timer_expired(void *data)
158 {
159         struct irlap_cb *self = (struct irlap_cb *) data;
160
161         IRDA_ASSERT(self != NULL, return;);
162         IRDA_ASSERT(self->magic == LAP_MAGIC, return;);
163
164         irlap_do_event(self, QUERY_TIMER_EXPIRED, NULL, NULL);
165 }
166
167 /*
168  * Function irda_final_timer_expired (data)
169  *
170  *
171  *
172  */
173 static void irlap_final_timer_expired(void *data)
174 {
175         struct irlap_cb *self = (struct irlap_cb *) data;
176
177         IRDA_ASSERT(self != NULL, return;);
178         IRDA_ASSERT(self->magic == LAP_MAGIC, return;);
179
180         irlap_do_event(self, FINAL_TIMER_EXPIRED, NULL, NULL);
181 }
182
183 /*
184  * Function irda_wd_timer_expired (data)
185  *
186  *
187  *
188  */
189 static void irlap_wd_timer_expired(void *data)
190 {
191         struct irlap_cb *self = (struct irlap_cb *) data;
192
193         IRDA_ASSERT(self != NULL, return;);
194         IRDA_ASSERT(self->magic == LAP_MAGIC, return;);
195
196         irlap_do_event(self, WD_TIMER_EXPIRED, NULL, NULL);
197 }
198
199 /*
200  * Function irda_backoff_timer_expired (data)
201  *
202  *
203  *
204  */
205 static void irlap_backoff_timer_expired(void *data)
206 {
207         struct irlap_cb *self = (struct irlap_cb *) data;
208
209         IRDA_ASSERT(self != NULL, return;);
210         IRDA_ASSERT(self->magic == LAP_MAGIC, return;);
211
212         irlap_do_event(self, BACKOFF_TIMER_EXPIRED, NULL, NULL);
213 }
214
215
216 /*
217  * Function irtty_media_busy_expired (data)
218  *
219  *
220  */
221 static void irlap_media_busy_expired(void *data)
222 {
223         struct irlap_cb *self = (struct irlap_cb *) data;
224
225         IRDA_ASSERT(self != NULL, return;);
226
227         irda_device_set_media_busy(self->netdev, FALSE);
228         /* Note : the LAP event will be send in irlap_stop_mbusy_timer(),
229         * to catch other cases where the flag is cleared (for example
230         * after a discovery) - Jean II */
231 }