2005-04-17 06:20:36 +08:00
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/*********************************************************************
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*
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* Filename: timer.h
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* Version:
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* Description:
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* Status: Experimental.
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* Author: Dag Brattli <dagb@cs.uit.no>
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* Created at: Sat Aug 16 00:59:29 1997
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* Modified at: Thu Oct 7 12:25:24 1999
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* Modified by: Dag Brattli <dagb@cs.uit.no>
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*
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* Copyright (c) 1997, 1998-1999 Dag Brattli <dagb@cs.uit.no>,
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* All Rights Reserved.
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* Copyright (c) 2000-2002 Jean Tourrilhes <jt@hpl.hp.com>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* Neither Dag Brattli nor University of Troms<EFBFBD> admit liability nor
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* provide warranty for any of this software. This material is
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* provided "AS-IS" and at no charge.
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*
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********************************************************************/
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#ifndef TIMER_H
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#define TIMER_H
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#include <linux/timer.h>
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2006-12-04 12:15:30 +08:00
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#include <linux/jiffies.h>
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2005-04-17 06:20:36 +08:00
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#include <asm/param.h> /* for HZ */
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#include <net/irda/irda.h>
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/* A few forward declarations (to make compiler happy) */
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struct irlmp_cb;
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struct irlap_cb;
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struct lsap_cb;
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struct lap_cb;
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/*
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* Timeout definitions, some defined in IrLAP 6.13.5 - p. 92
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*/
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#define POLL_TIMEOUT (450*HZ/1000) /* Must never exceed 500 ms */
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#define FINAL_TIMEOUT (500*HZ/1000) /* Must never exceed 500 ms */
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/*
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* Normally twice of p-timer. Note 3, IrLAP 6.3.11.2 - p. 60 suggests
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* at least twice duration of the P-timer.
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*/
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#define WD_TIMEOUT (POLL_TIMEOUT*2)
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#define MEDIABUSY_TIMEOUT (500*HZ/1000) /* 500 msec */
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#define SMALLBUSY_TIMEOUT (100*HZ/1000) /* 100 msec - IrLAP 6.13.4 */
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/*
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* Slot timer must never exceed 85 ms, and must always be at least 25 ms,
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* suggested to 75-85 msec by IrDA lite. This doesn't work with a lot of
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* devices, and other stackes uses a lot more, so it's best we do it as well
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* (Note : this is the default value and sysctl overides it - Jean II)
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*/
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#define SLOT_TIMEOUT (90*HZ/1000)
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/*
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* The latest discovery frame (XID) is longer due to the extra discovery
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* information (hints, device name...). This is its extra length.
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* We use that when setting the query timeout. Jean II
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*/
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#define XIDEXTRA_TIMEOUT (34*HZ/1000) /* 34 msec */
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#define WATCHDOG_TIMEOUT (20*HZ) /* 20 sec */
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typedef void (*TIMER_CALLBACK)(void *);
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static inline void irda_start_timer(struct timer_list *ptimer, int timeout,
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void* data, TIMER_CALLBACK callback)
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{
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ptimer->function = (void (*)(unsigned long)) callback;
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ptimer->data = (unsigned long) data;
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/* Set new value for timer (update or add timer).
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* We use mod_timer() because it's more efficient and also
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* safer with respect to race conditions - Jean II */
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mod_timer(ptimer, jiffies + timeout);
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}
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void irlap_start_slot_timer(struct irlap_cb *self, int timeout);
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void irlap_start_query_timer(struct irlap_cb *self, int S, int s);
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void irlap_start_final_timer(struct irlap_cb *self, int timeout);
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void irlap_start_wd_timer(struct irlap_cb *self, int timeout);
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void irlap_start_backoff_timer(struct irlap_cb *self, int timeout);
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void irlap_start_mbusy_timer(struct irlap_cb *self, int timeout);
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void irlap_stop_mbusy_timer(struct irlap_cb *);
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void irlmp_start_watchdog_timer(struct lsap_cb *, int timeout);
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void irlmp_start_discovery_timer(struct irlmp_cb *, int timeout);
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void irlmp_start_idle_timer(struct lap_cb *, int timeout);
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void irlmp_stop_idle_timer(struct lap_cb *self);
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#endif
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