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/*********************************************************************
*
* Filename: esi.c
* Version: 1.6
* Description: Driver for the Extended Systems JetEye PC dongle
* Status: Experimental.
* Author: Dag Brattli <dagb@cs.uit.no>
* Created at: Sat Feb 21 18:54:38 1998
* Modified at: Sun Oct 27 22:01:04 2002
* Modified by: Martin Diehl <mad@mdiehl.de>
*
* Copyright (c) 1999 Dag Brattli, <dagb@cs.uit.no>,
* Copyright (c) 1998 Thomas Davis, <ratbert@radiks.net>,
* Copyright (c) 2002 Martin Diehl, <mad@mdiehl.de>,
* All Rights Reserved.
*
* 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, see <http://www.gnu.org/licenses/>.
*
********************************************************************/
#include <linux/module.h>
#include <linux/delay.h>
#include <linux/init.h>
#include <net/irda/irda.h>
#include "sir-dev.h"
static int esi_open(struct sir_dev *);
static int esi_close(struct sir_dev *);
static int esi_change_speed(struct sir_dev *, unsigned);
static int esi_reset(struct sir_dev *);
static struct dongle_driver esi = {
.owner = THIS_MODULE,
.driver_name = "JetEye PC ESI-9680 PC",
.type = IRDA_ESI_DONGLE,
.open = esi_open,
.close = esi_close,
.reset = esi_reset,
.set_speed = esi_change_speed,
};
static int __init esi_sir_init(void)
{
return irda_register_dongle(&esi);
}
static void __exit esi_sir_cleanup(void)
{
irda_unregister_dongle(&esi);
}
static int esi_open(struct sir_dev *dev)
{
struct qos_info *qos = &dev->qos;
/* Power up and set dongle to 9600 baud */
sirdev_set_dtr_rts(dev, FALSE, TRUE);
qos->baud_rate.bits &= IR_9600|IR_19200|IR_115200;
qos->min_turn_time.bits = 0x01; /* Needs at least 10 ms */
irda_qos_bits_to_value(qos);
/* irda thread waits 50 msec for power settling */
return 0;
}
static int esi_close(struct sir_dev *dev)
{
/* Power off dongle */
sirdev_set_dtr_rts(dev, FALSE, FALSE);
return 0;
}
/*
* Function esi_change_speed (task)
*
* Set the speed for the Extended Systems JetEye PC ESI-9680 type dongle
* Apparently (see old esi-driver) no delays are needed here...
*
*/
static int esi_change_speed(struct sir_dev *dev, unsigned speed)
{
int ret = 0;
int dtr, rts;
switch (speed) {
case 19200:
dtr = TRUE;
rts = FALSE;
break;
case 115200:
dtr = rts = TRUE;
break;
default:
ret = -EINVAL;
speed = 9600;
/* fall through */
case 9600:
dtr = FALSE;
rts = TRUE;
break;
}
/* Change speed of dongle */
sirdev_set_dtr_rts(dev, dtr, rts);
dev->speed = speed;
return ret;
}
/*
* Function esi_reset (task)
*
* Reset dongle;
*
*/
static int esi_reset(struct sir_dev *dev)
{
sirdev_set_dtr_rts(dev, FALSE, FALSE);
/* Hm, the old esi-driver left the dongle unpowered relying on
* the following speed change to repower. This might work for
* the esi because we only need the modem lines. However, now the
* general rule is reset must bring the dongle to some working
* well-known state because speed change might write to registers.
* The old esi-driver didn't any delay here - let's hope it' fine.
*/
sirdev_set_dtr_rts(dev, FALSE, TRUE);
dev->speed = 9600;
return 0;
}
MODULE_AUTHOR("Dag Brattli <dagb@cs.uit.no>");
MODULE_DESCRIPTION("Extended Systems JetEye PC dongle driver");
MODULE_LICENSE("GPL");
MODULE_ALIAS("irda-dongle-1"); /* IRDA_ESI_DONGLE */
module_init(esi_sir_init);
module_exit(esi_sir_cleanup);
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