1/********************************************************************* 2 * 3 * Filename: timer.h 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: Thu Oct 7 12:25:24 1999 10 * Modified by: Dag Brattli <dagb@cs.uit.no> 11 * 12 * Copyright (c) 1997, 1998-1999 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#ifndef TIMER_H 28#define TIMER_H 29 30#include <linux/timer.h> 31#include <linux/jiffies.h> 32 33#include <asm/param.h> /* for HZ */ 34 35#include <net/irda/irda.h> 36 37/* A few forward declarations (to make compiler happy) */ 38struct irlmp_cb; 39struct irlap_cb; 40struct lsap_cb; 41struct lap_cb; 42 43/* 44 * Timeout definitions, some defined in IrLAP 6.13.5 - p. 92 45 */ 46#define POLL_TIMEOUT (450*HZ/1000) /* Must never exceed 500 ms */ 47#define FINAL_TIMEOUT (500*HZ/1000) /* Must never exceed 500 ms */ 48 49/* 50 * Normally twice of p-timer. Note 3, IrLAP 6.3.11.2 - p. 60 suggests 51 * at least twice duration of the P-timer. 52 */ 53#define WD_TIMEOUT (POLL_TIMEOUT*2) 54 55#define MEDIABUSY_TIMEOUT (500*HZ/1000) /* 500 msec */ 56#define SMALLBUSY_TIMEOUT (100*HZ/1000) /* 100 msec - IrLAP 6.13.4 */ 57 58/* 59 * Slot timer must never exceed 85 ms, and must always be at least 25 ms, 60 * suggested to 75-85 msec by IrDA lite. This doesn't work with a lot of 61 * devices, and other stackes uses a lot more, so it's best we do it as well 62 * (Note : this is the default value and sysctl overides it - Jean II) 63 */ 64#define SLOT_TIMEOUT (90*HZ/1000) 65 66/* 67 * The latest discovery frame (XID) is longer due to the extra discovery 68 * information (hints, device name...). This is its extra length. 69 * We use that when setting the query timeout. Jean II 70 */ 71#define XIDEXTRA_TIMEOUT (34*HZ/1000) /* 34 msec */ 72 73#define WATCHDOG_TIMEOUT (20*HZ) /* 20 sec */ 74 75typedef void (*TIMER_CALLBACK)(void *); 76 77static inline void irda_start_timer(struct timer_list *ptimer, int timeout, 78 void* data, TIMER_CALLBACK callback) 79{ 80 ptimer->function = (void (*)(unsigned long)) callback; 81 ptimer->data = (unsigned long) data; 82 83 /* Set new value for timer (update or add timer). 84 * We use mod_timer() because it's more efficient and also 85 * safer with respect to race conditions - Jean II */ 86 mod_timer(ptimer, jiffies + timeout); 87} 88 89 90void irlap_start_slot_timer(struct irlap_cb *self, int timeout); 91void irlap_start_query_timer(struct irlap_cb *self, int S, int s); 92void irlap_start_final_timer(struct irlap_cb *self, int timeout); 93void irlap_start_wd_timer(struct irlap_cb *self, int timeout); 94void irlap_start_backoff_timer(struct irlap_cb *self, int timeout); 95 96void irlap_start_mbusy_timer(struct irlap_cb *self, int timeout); 97void irlap_stop_mbusy_timer(struct irlap_cb *); 98 99void irlmp_start_watchdog_timer(struct lsap_cb *, int timeout); 100void irlmp_start_discovery_timer(struct irlmp_cb *, int timeout); 101void irlmp_start_idle_timer(struct lap_cb *, int timeout); 102void irlmp_stop_idle_timer(struct lap_cb *self); 103 104#endif 105 106