irda_device.c

sparc硬件平台上的红外协议

/*********************************************************************
*
* Filename:      irda_device.c
* Version:       0.9
* Description:   Utility functions used by the device drivers
* Status:        Experimental.
* Author:        Dag Brattli <[e-mail]>
* Created at:    Sat Oct  9 09:22:27 1999
* Modified at:   Sun Jan 23 17:41:24 2000
* Modified by:   Dag Brattli <[e-mail]>
*
*     Copyright (c) 1999-2000 Dag Brattli, All Rights Reserved.
*     Copyright (c) 2000-2001 Jean Tourrilhes <[e-mail]>
*
*     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.
*
*     This program is distributed in the hope that it will be useful,
*     but WITHOUT ANY WARRANTY; without even the implied warranty of
*     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
*     GNU General Public License for more details.
*
*     You should have received a copy of the GNU General Public License
*     along with this program; if not, write to the Free Software
*     Foundation, Inc., 59 Temple Place, Suite 330, Boston,
*     MA 02111-1307 USA
*
********************************************************************/

#include <string.h>

#include "skbuff.h"

#include "netdevice.h"

#include "irda_device.h"
#include "irlap.h"
#include "timer.h"
#include "wrapper.h"
#include "irda.h"
#include <time.h>
//	static void __irda_task_delete(struct irda_task *task);

static hashbin_t *dongles = NULL;
static hashbin_t *tasks = NULL;

#ifdef CONFIG_IRDA_DEBUG
static const char *task_state[] = {
	"IRDA_TASK_INIT",
		"IRDA_TASK_DONE",
		"IRDA_TASK_WAIT",
		"IRDA_TASK_WAIT1",
		"IRDA_TASK_WAIT2",
		"IRDA_TASK_WAIT3",
		"IRDA_TASK_CHILD_INIT",
		"IRDA_TASK_CHILD_WAIT",
		"IRDA_TASK_CHILD_DONE",
};
#endif	/* CONFIG_IRDA_DEBUG */


/*
* Function irda_device_set_media_busy (self, status)
*
*    Called when we have detected that another station is transmitting
*    in contention mode.
*/
void irda_device_set_media_busy(struct net_device *dev, int status)
{
	struct irlap_cb *self;
	
	
	IRDA_DEBUG(1, "%s(%s)\n", __FUNCTION__, status ? "TRUE" : "FALSE");
	
	self = (struct irlap_cb *) dev->atalk_ptr;
	
	/* Some drivers may enable the receive interrupt before calling
	* irlap_open(), or they may disable the receive interrupt
	* after calling irlap_close().
	* The IrDA stack is protected from this in irlap_driver_rcv().
	* However, the driver calls directly the wrapper, that calls
	* us directly. Make sure we protect ourselves.
	* Jean II */
	
	
	if (!self || self->magic != LAP_MAGIC)
		return;
	if (status) {
		self->media_busy = TRUE;
		
		if (status == SMALL)
			irlap_start_mbusy_timer(self, SMALLBUSY_TIMEOUT);
		else
			irlap_start_mbusy_timer(self, MEDIABUSY_TIMEOUT);
		
	} else {
		
		self->media_busy = FALSE;
		irlap_stop_mbusy_timer(self);
	}
	
}