/*********************************************************************
   *
   * Filename:      timer.c
   * Version:
   * Description:
   * Status:        Experimental.
   * Author:        Dag Brattli <dagb@cs.uit.no>
   * Created at:    Sat Aug 16 00:59:29 1997
   * Modified at:   Wed Dec  8 12:50:34 1999
   * Modified by:   Dag Brattli <dagb@cs.uit.no>
   *
   *     Copyright (c) 1997, 1999 Dag Brattli <dagb@cs.uit.no>,
   *     All Rights Reserved.
   *     Copyright (c) 2000-2002 Jean Tourrilhes <jt@hpl.hp.com>
   *
   *     This program is free software; you can redistribute it and/or
   *     modify it under the terms of the GNU General Public License as
   *     published by the Free Software Foundation; either version 2 of
   *     the License, or (at your option) any later version.
   *
   *     Neither Dag Brattli nor University of Tromsø admit liability nor
   *     provide warranty for any of this software. This material is
   *     provided "AS-IS" and at no charge.
   *
   ********************************************************************/
  
  #include <linux/delay.h>
  
  #include <net/irda/timer.h>
  #include <net/irda/irda.h>
  #include <net/irda/irda_device.h>
  #include <net/irda/irlap.h>
  #include <net/irda/irlmp.h>
  
  extern int  sysctl_slot_timeout;
  
  static void irlap_slot_timer_expired(void* data);
  static void irlap_query_timer_expired(void* data);
  static void irlap_final_timer_expired(void* data);
  static void irlap_wd_timer_expired(void* data);
  static void irlap_backoff_timer_expired(void* data);
  static void irlap_media_busy_expired(void* data);
  
  void irlap_start_slot_timer(struct irlap_cb *self, int timeout)
  {
  	irda_start_timer(&self->slot_timer, timeout, (void *) self,
  			 irlap_slot_timer_expired);
  }
  
  void irlap_start_query_timer(struct irlap_cb *self, int S, int s)
  {
  	int timeout;
  
  	/* Calculate when the peer discovery should end. Normally, we
  	 * get the end-of-discovery frame, so this is just in case
  	 * we miss it.
  	 * Basically, we multiply the number of remaining slots by our
  	 * slot time, plus add some extra time to properly receive the last
  	 * discovery packet (which is longer due to extra discovery info),
  	 * to avoid messing with for incoming connections requests and
  	 * to accommodate devices that perform discovery slower than us.
  	 * Jean II */
  	timeout = ((sysctl_slot_timeout * HZ / 1000) * (S - s)
  		   + XIDEXTRA_TIMEOUT + SMALLBUSY_TIMEOUT);
  
  	/* Set or re-set the timer. We reset the timer for each received
  	 * discovery query, which allow us to automatically adjust to
  	 * the speed of the peer discovery (faster or slower). Jean II */
  	irda_start_timer( &self->query_timer, timeout, (void *) self,
  			  irlap_query_timer_expired);
  }
  
  void irlap_start_final_timer(struct irlap_cb *self, int timeout)
  {
  	irda_start_timer(&self->final_timer, timeout, (void *) self,
  			 irlap_final_timer_expired);
  }
  
  void irlap_start_wd_timer(struct irlap_cb *self, int timeout)
  {
  	irda_start_timer(&self->wd_timer, timeout, (void *) self,
  			 irlap_wd_timer_expired);
  }
  
  void irlap_start_backoff_timer(struct irlap_cb *self, int timeout)
  {
  	irda_start_timer(&self->backoff_timer, timeout, (void *) self,
  			 irlap_backoff_timer_expired);
  }
  
  void irlap_start_mbusy_timer(struct irlap_cb *self, int timeout)
  {
  	irda_start_timer(&self->media_busy_timer, timeout,
  			 (void *) self, irlap_media_busy_expired);
  }
  
  void irlap_stop_mbusy_timer(struct irlap_cb *self)
  {
  	/* If timer is activated, kill it! */
  	del_timer(&self->media_busy_timer);
  
  	/* If we are in NDM, there is a bunch of events in LAP that
  	 * that be pending due to the media_busy condition, such as
  	 * CONNECT_REQUEST and SEND_UI_FRAME. If we don't generate
  	 * an event, they will wait forever...
  	 * Jean II */
  	if (self->state == LAP_NDM)
  		irlap_do_event(self, MEDIA_BUSY_TIMER_EXPIRED, NULL, NULL);
  }
  
  void irlmp_start_watchdog_timer(struct lsap_cb *self, int timeout)
  {
  	irda_start_timer(&self->watchdog_timer, timeout, (void *) self,
  			 irlmp_watchdog_timer_expired);
  }
  
  void irlmp_start_discovery_timer(struct irlmp_cb *self, int timeout)
  {
  	irda_start_timer(&self->discovery_timer, timeout, (void *) self,
  			 irlmp_discovery_timer_expired);
  }
  
  void irlmp_start_idle_timer(struct lap_cb *self, int timeout)
  {
  	irda_start_timer(&self->idle_timer, timeout, (void *) self,
  			 irlmp_idle_timer_expired);
  }
  
  void irlmp_stop_idle_timer(struct lap_cb *self)
  {
  	/* If timer is activated, kill it! */
  	del_timer(&self->idle_timer);
  }
  
  /*
   * Function irlap_slot_timer_expired (data)
   *
   *    IrLAP slot timer has expired
   *
   */
  static void irlap_slot_timer_expired(void *data)
  {
  	struct irlap_cb *self = (struct irlap_cb *) data;
  
  	IRDA_ASSERT(self != NULL, return;);
  	IRDA_ASSERT(self->magic == LAP_MAGIC, return;);
  
  	irlap_do_event(self, SLOT_TIMER_EXPIRED, NULL, NULL);
  }
  
  /*
   * Function irlap_query_timer_expired (data)
   *
   *    IrLAP query timer has expired
   *
   */
  static void irlap_query_timer_expired(void *data)
  {
  	struct irlap_cb *self = (struct irlap_cb *) data;
  
  	IRDA_ASSERT(self != NULL, return;);
  	IRDA_ASSERT(self->magic == LAP_MAGIC, return;);
  
  	irlap_do_event(self, QUERY_TIMER_EXPIRED, NULL, NULL);
  }
  
  /*
   * Function irda_final_timer_expired (data)
   *
   *
   *
   */
  static void irlap_final_timer_expired(void *data)
  {
  	struct irlap_cb *self = (struct irlap_cb *) data;
  
  	IRDA_ASSERT(self != NULL, return;);
  	IRDA_ASSERT(self->magic == LAP_MAGIC, return;);
  
  	irlap_do_event(self, FINAL_TIMER_EXPIRED, NULL, NULL);
  }
  
  /*
   * Function irda_wd_timer_expired (data)
   *
   *
   *
   */
  static void irlap_wd_timer_expired(void *data)
  {
  	struct irlap_cb *self = (struct irlap_cb *) data;
  
  	IRDA_ASSERT(self != NULL, return;);
  	IRDA_ASSERT(self->magic == LAP_MAGIC, return;);
  
  	irlap_do_event(self, WD_TIMER_EXPIRED, NULL, NULL);
  }
  
  /*
   * Function irda_backoff_timer_expired (data)
   *
   *
   *
   */
  static void irlap_backoff_timer_expired(void *data)
  {
  	struct irlap_cb *self = (struct irlap_cb *) data;
  
  	IRDA_ASSERT(self != NULL, return;);
  	IRDA_ASSERT(self->magic == LAP_MAGIC, return;);
  
  	irlap_do_event(self, BACKOFF_TIMER_EXPIRED, NULL, NULL);
  }
  
  
  /*
   * Function irtty_media_busy_expired (data)
   *
   *
   */
  static void irlap_media_busy_expired(void *data)
  {
  	struct irlap_cb *self = (struct irlap_cb *) data;
  
  	IRDA_ASSERT(self != NULL, return;);
  
  	irda_device_set_media_busy(self->netdev, FALSE);
  	/* Note : the LAP event will be send in irlap_stop_mbusy_timer(),
  	* to catch other cases where the flag is cleared (for example
  	* after a discovery) - Jean II */
  }