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) 2000-2001 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/irtty.h>
  34 #include <net/irda/irlap.h>
  35 #include <net/irda/irlmp_event.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
  43 static void irlap_media_busy_expired(void* data);
  44 /*
  45  * Function irda_start_timer (timer, timeout)
  46  *
  47  *    Start an IrDA timer
  48  *
  49  */
  50 void irda_start_timer(struct timer_list *ptimer, int timeout, void *data,
  51                       TIMER_CALLBACK callback)
  52 {
  53         del_timer(ptimer);
  54
  55         ptimer->data = (unsigned long) data;
  56
  57         /*
  58          * For most architectures void * is the same as unsigned long, but
  59          * at least we try to use void * as long as possible. Since the
  60          * timer functions use unsigned long, we cast the function here
  61          */
  62         ptimer->function = (void (*)(unsigned long)) callback;
  63         ptimer->expires = jiffies + timeout;
  64
  65         add_timer(ptimer);
  66 }
  67
  68 void irlap_start_slot_timer(struct irlap_cb *self, int timeout)
  69 {
  70         irda_start_timer(&self->slot_timer, timeout, (void *) self,
  71                          irlap_slot_timer_expired);
  72 }
  73
  74 void irlap_start_query_timer(struct irlap_cb *self, int timeout)
  75 {
  76         irda_start_timer( &self->query_timer, timeout, (void *) self,
  77                           irlap_query_timer_expired);
  78 }
  79
  80 void irlap_start_final_timer(struct irlap_cb *self, int timeout)
  81 {
  82         irda_start_timer(&self->final_timer, timeout, (void *) self,
  83                          irlap_final_timer_expired);
  84 }
  85
  86 void irlap_start_wd_timer(struct irlap_cb *self, int timeout)
  87 {
  88         irda_start_timer(&self->wd_timer, timeout, (void *) self,
  89                          irlap_wd_timer_expired);
  90 }
  91
  92 void irlap_start_backoff_timer(struct irlap_cb *self, int timeout)
  93 {
  94         irda_start_timer(&self->backoff_timer, timeout, (void *) self,
  95                          irlap_backoff_timer_expired);
  96 }
  97
  98 void irlap_start_mbusy_timer(struct irlap_cb *self, int timeout)
  99 {
 100         irda_start_timer(&self->media_busy_timer, timeout,
 101                          (void *) self, irlap_media_busy_expired);
 102 }
 103
 104 void irlap_stop_mbusy_timer(struct irlap_cb *self)
 105 {
 106         /* If timer is activated, kill it! */
 107         del_timer(&self->media_busy_timer);
 108
 109         /* If we are in NDM, there is a bunch of events in LAP that
 110          * that be pending due to the media_busy condition, such as
 111          * CONNECT_REQUEST and SEND_UI_FRAME. If we don't generate
 112          * an event, they will wait forever...
 113          * Jean II */
 114         if (self->state == LAP_NDM)
 115                 irlap_do_event(self, MEDIA_BUSY_TIMER_EXPIRED, NULL, NULL);
 116 }
 117
 118 void irlmp_start_watchdog_timer(struct lsap_cb *self, int timeout)
 119 {
 120         irda_start_timer(&self->watchdog_timer, timeout, (void *) self,
 121                          irlmp_watchdog_timer_expired);
 122 }
 123
 124 void irlmp_start_discovery_timer(struct irlmp_cb *self, int timeout)
 125 {
 126         irda_start_timer(&self->discovery_timer, timeout, (void *) self,
 127                          irlmp_discovery_timer_expired);
 128 }
 129
 130 void irlmp_start_idle_timer(struct lap_cb *self, int timeout)
 131 {
 132         irda_start_timer(&self->idle_timer, timeout, (void *) self,
 133                          irlmp_idle_timer_expired);
 134 }
 135
 136 void irlmp_stop_idle_timer(struct lap_cb *self)
 137 {
 138         /* If timer is activated, kill it! */
 139         if(timer_pending(&self->idle_timer))
 140                 del_timer(&self->idle_timer);
 141 }
 142
 143 /*
 144  * Function irlap_slot_timer_expired (data)
 145  *
 146  *    IrLAP slot timer has expired
 147  *
 148  */
 149 static void irlap_slot_timer_expired(void *data)
 150 {
 151         struct irlap_cb *self = (struct irlap_cb *) data;
 152
 153         ASSERT(self != NULL, return;);
 154         ASSERT(self->magic == LAP_MAGIC, return;);
 155
 156         irlap_do_event(self, SLOT_TIMER_EXPIRED, NULL, NULL);
 157 }
 158
 159 /*
 160  * Function irlap_query_timer_expired (data)
 161  *
 162  *    IrLAP query timer has expired
 163  *
 164  */
 165 static void irlap_query_timer_expired(void *data)
 166 {
 167         struct irlap_cb *self = (struct irlap_cb *) data;
 168
 169         ASSERT(self != NULL, return;);
 170         ASSERT(self->magic == LAP_MAGIC, return;);
 171
 172         irlap_do_event(self, QUERY_TIMER_EXPIRED, NULL, NULL);
 173 }
 174
 175 /*
 176  * Function irda_final_timer_expired (data)
 177  *
 178  *
 179  *
 180  */
 181 static void irlap_final_timer_expired(void *data)
 182 {
 183         struct irlap_cb *self = (struct irlap_cb *) data;
 184
 185         ASSERT(self != NULL, return;);
 186         ASSERT(self->magic == LAP_MAGIC, return;);
 187
 188         irlap_do_event(self, FINAL_TIMER_EXPIRED, NULL, NULL);
 189 }
 190
 191 /*
 192  * Function irda_wd_timer_expired (data)
 193  *
 194  *
 195  *
 196  */
 197 static void irlap_wd_timer_expired(void *data)
 198 {
 199         struct irlap_cb *self = (struct irlap_cb *) data;
 200
 201         ASSERT(self != NULL, return;);
 202         ASSERT(self->magic == LAP_MAGIC, return;);
 203
 204         irlap_do_event(self, WD_TIMER_EXPIRED, NULL, NULL);
 205 }
 206
 207 /*
 208  * Function irda_backoff_timer_expired (data)
 209  *
 210  *
 211  *
 212  */
 213 static void irlap_backoff_timer_expired(void *data)
 214 {
 215         struct irlap_cb *self = (struct irlap_cb *) data;
 216
 217         ASSERT(self != NULL, return;);
 218         ASSERT(self->magic == LAP_MAGIC, return;);
 219
 220         irlap_do_event(self, BACKOFF_TIMER_EXPIRED, NULL, NULL);
 221 }
 222
 223
 224 /*
 225  * Function irtty_media_busy_expired (data)
 226  *
 227  *
 228  */
 229 void irlap_media_busy_expired(void* data)
 230 {
 231         struct irlap_cb *self = (struct irlap_cb *) data;
 232
 233         ASSERT(self != NULL, return;);
 234
 235         irda_device_set_media_busy(self->netdev, FALSE);
 236         /* Note : the LAP event will be send in irlap_stop_mbusy_timer(),
 237         * to catch other cases where the flag is cleared (for example
 238         * after a discovery) - Jean II */
 239 }