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marcus.erl |
/*********************************************************************
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*
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* Filename: esi.c
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* Version: 1.6
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* Description: Driver for the Extended Systems JetEye PC dongle
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* Status: Experimental.
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* Author: Dag Brattli <dagb@cs.uit.no>
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* Created at: Sat Feb 21 18:54:38 1998
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* Modified at: Sun Oct 27 22:01:04 2002
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* Modified by: Martin Diehl <mad@mdiehl.de>
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*
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* Copyright (c) 1999 Dag Brattli, <dagb@cs.uit.no>,
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* Copyright (c) 1998 Thomas Davis, <ratbert@radiks.net>,
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* Copyright (c) 2002 Martin Diehl, <mad@mdiehl.de>,
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* All Rights Reserved.
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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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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*
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********************************************************************/
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#include <linux/module.h>
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#include <linux/delay.h>
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#include <linux/init.h>
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#include <net/irda/irda.h>
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#include "sir-dev.h"
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static int esi_open(struct sir_dev *);
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static int esi_close(struct sir_dev *);
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static int esi_change_speed(struct sir_dev *, unsigned);
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static int esi_reset(struct sir_dev *);
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static struct dongle_driver esi = {
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.owner = THIS_MODULE,
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.driver_name = "JetEye PC ESI-9680 PC",
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.type = IRDA_ESI_DONGLE,
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.open = esi_open,
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.close = esi_close,
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.reset = esi_reset,
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.set_speed = esi_change_speed,
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};
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static int __init esi_sir_init(void)
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{
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return irda_register_dongle(&esi);
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}
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static void __exit esi_sir_cleanup(void)
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{
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irda_unregister_dongle(&esi);
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}
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static int esi_open(struct sir_dev *dev)
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{
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struct qos_info *qos = &dev->qos;
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/* Power up and set dongle to 9600 baud */
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sirdev_set_dtr_rts(dev, FALSE, TRUE);
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qos->baud_rate.bits &= IR_9600|IR_19200|IR_115200;
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qos->min_turn_time.bits = 0x01; /* Needs at least 10 ms */
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irda_qos_bits_to_value(qos);
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/* irda thread waits 50 msec for power settling */
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return 0;
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}
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static int esi_close(struct sir_dev *dev)
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{
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/* Power off dongle */
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sirdev_set_dtr_rts(dev, FALSE, FALSE);
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return 0;
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}
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/*
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* Function esi_change_speed (task)
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*
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* Set the speed for the Extended Systems JetEye PC ESI-9680 type dongle
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* Apparently (see old esi-driver) no delays are needed here...
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*
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*/
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static int esi_change_speed(struct sir_dev *dev, unsigned speed)
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{
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int ret = 0;
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int dtr, rts;
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switch (speed) {
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case 19200:
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dtr = TRUE;
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rts = FALSE;
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break;
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case 115200:
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dtr = rts = TRUE;
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break;
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default:
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ret = -EINVAL;
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speed = 9600;
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/* fall through */
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case 9600:
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dtr = FALSE;
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rts = TRUE;
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break;
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}
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/* Change speed of dongle */
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sirdev_set_dtr_rts(dev, dtr, rts);
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dev->speed = speed;
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return ret;
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}
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/*
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* Function esi_reset (task)
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*
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* Reset dongle;
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*
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*/
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static int esi_reset(struct sir_dev *dev)
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{
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sirdev_set_dtr_rts(dev, FALSE, FALSE);
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/* Hm, the old esi-driver left the dongle unpowered relying on
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* the following speed change to repower. This might work for
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* the esi because we only need the modem lines. However, now the
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* general rule is reset must bring the dongle to some working
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* well-known state because speed change might write to registers.
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* The old esi-driver didn't any delay here - let's hope it' fine.
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*/
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sirdev_set_dtr_rts(dev, FALSE, TRUE);
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dev->speed = 9600;
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return 0;
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}
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MODULE_AUTHOR("Dag Brattli <dagb@cs.uit.no>");
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MODULE_DESCRIPTION("Extended Systems JetEye PC dongle driver");
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MODULE_LICENSE("GPL");
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MODULE_ALIAS("irda-dongle-1"); /* IRDA_ESI_DONGLE */
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module_init(esi_sir_init);
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module_exit(esi_sir_cleanup);
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