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 <asm/system.h>
  28 #include <linux/config.h>
  29 #include <linux/delay.h>
  30
  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>
  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 timeout)
  51 {
  52         irda_start_timer( &self->query_timer, timeout, (void *) self,
  53                           irlap_query_timer_expired);
  54 }
  55
  56 void irlap_start_final_timer(struct irlap_cb *self, int timeout)
  57 {
  58         irda_start_timer(&self->final_timer, timeout, (void *) self,
  59                          irlap_final_timer_expired);
  60 }
  61
  62 void irlap_start_wd_timer(struct irlap_cb *self, int timeout)
  63 {
  64         irda_start_timer(&self->wd_timer, timeout, (void *) self,
  65                          irlap_wd_timer_expired);
  66 }
  67
  68 void irlap_start_backoff_timer(struct irlap_cb *self, int timeout)
  69 {
  70         irda_start_timer(&self->backoff_timer, timeout, (void *) self,
  71                          irlap_backoff_timer_expired);
  72 }
  73
  74 void irlap_start_mbusy_timer(struct irlap_cb *self, int timeout)
  75 {
  76         irda_start_timer(&self->media_busy_timer, timeout,
  77                          (void *) self, irlap_media_busy_expired);
  78 }
  79
  80 void irlap_stop_mbusy_timer(struct irlap_cb *self)
  81 {
  82         /* If timer is activated, kill it! */
  83         del_timer(&self->media_busy_timer);
  84
  85         /* If we are in NDM, there is a bunch of events in LAP that
  86          * that be pending due to the media_busy condition, such as
  87          * CONNECT_REQUEST and SEND_UI_FRAME. If we don't generate
  88          * an event, they will wait forever...
  89          * Jean II */
  90         if (self->state == LAP_NDM)
  91                 irlap_do_event(self, MEDIA_BUSY_TIMER_EXPIRED, NULL, NULL);
  92 }
  93
  94 void irlmp_start_watchdog_timer(struct lsap_cb *self, int timeout)
  95 {
  96         irda_start_timer(&self->watchdog_timer, timeout, (void *) self,
  97                          irlmp_watchdog_timer_expired);
  98 }
  99
 100 void irlmp_start_discovery_timer(struct irlmp_cb *self, int timeout)
 101 {
 102         irda_start_timer(&self->discovery_timer, timeout, (void *) self,
 103                          irlmp_discovery_timer_expired);
 104 }
 105
 106 void irlmp_start_idle_timer(struct lap_cb *self, int timeout)
 107 {
 108         irda_start_timer(&self->idle_timer, timeout, (void *) self,
 109                          irlmp_idle_timer_expired);
 110 }
 111
 112 void irlmp_stop_idle_timer(struct lap_cb *self)
 113 {
 114         /* If timer is activated, kill it! */
 115         del_timer(&self->idle_timer);
 116 }
 117
 118 /*
 119  * Function irlap_slot_timer_expired (data)
 120  *
 121  *    IrLAP slot timer has expired
 122  *
 123  */
 124 static void irlap_slot_timer_expired(void *data)
 125 {
 126         struct irlap_cb *self = (struct irlap_cb *) data;
 127
 128         ASSERT(self != NULL, return;);
 129         ASSERT(self->magic == LAP_MAGIC, return;);
 130
 131         irlap_do_event(self, SLOT_TIMER_EXPIRED, NULL, NULL);
 132 }
 133
 134 /*
 135  * Function irlap_query_timer_expired (data)
 136  *
 137  *    IrLAP query timer has expired
 138  *
 139  */
 140 static void irlap_query_timer_expired(void *data)
 141 {
 142         struct irlap_cb *self = (struct irlap_cb *) data;
 143
 144         ASSERT(self != NULL, return;);
 145         ASSERT(self->magic == LAP_MAGIC, return;);
 146
 147         irlap_do_event(self, QUERY_TIMER_EXPIRED, NULL, NULL);
 148 }
 149
 150 /*
 151  * Function irda_final_timer_expired (data)
 152  *
 153  *
 154  *
 155  */
 156 static void irlap_final_timer_expired(void *data)
 157 {
 158         struct irlap_cb *self = (struct irlap_cb *) data;
 159
 160         ASSERT(self != NULL, return;);
 161         ASSERT(self->magic == LAP_MAGIC, return;);
 162
 163         irlap_do_event(self, FINAL_TIMER_EXPIRED, NULL, NULL);
 164 }
 165
 166 /*
 167  * Function irda_wd_timer_expired (data)
 168  *
 169  *
 170  *
 171  */
 172 static void irlap_wd_timer_expired(void *data)
 173 {
 174         struct irlap_cb *self = (struct irlap_cb *) data;
 175
 176         ASSERT(self != NULL, return;);
 177         ASSERT(self->magic == LAP_MAGIC, return;);
 178
 179         irlap_do_event(self, WD_TIMER_EXPIRED, NULL, NULL);
 180 }
 181
 182 /*
 183  * Function irda_backoff_timer_expired (data)
 184  *
 185  *
 186  *
 187  */
 188 static void irlap_backoff_timer_expired(void *data)
 189 {
 190         struct irlap_cb *self = (struct irlap_cb *) data;
 191
 192         ASSERT(self != NULL, return;);
 193         ASSERT(self->magic == LAP_MAGIC, return;);
 194
 195         irlap_do_event(self, BACKOFF_TIMER_EXPIRED, NULL, NULL);
 196 }
 197
 198
 199 /*
 200  * Function irtty_media_busy_expired (data)
 201  *
 202  *
 203  */
 204 void irlap_media_busy_expired(void* data)
 205 {
 206         struct irlap_cb *self = (struct irlap_cb *) data;
 207
 208         ASSERT(self != NULL, return;);
 209
 210         irda_device_set_media_busy(self->netdev, FALSE);
 211         /* Note : the LAP event will be send in irlap_stop_mbusy_timer(),
 212         * to catch other cases where the flag is cleared (for example
 213         * after a discovery) - Jean II */
 214 }