1/*********************************************************************
  2 *                
  3 * Filename:      esi.c
  4 * Version:       1.6
  5 * Description:   Driver for the Extended Systems JetEye PC dongle
  6 * Status:        Experimental.
  7 * Author:        Dag Brattli <dagb@cs.uit.no>
  8 * Created at:    Sat Feb 21 18:54:38 1998
  9 * Modified at:   Sun Oct 27 22:01:04 2002
 10 * Modified by:   Martin Diehl <mad@mdiehl.de>
 11 * 
 12 *     Copyright (c) 1999 Dag Brattli, <dagb@cs.uit.no>,
 13 *     Copyright (c) 1998 Thomas Davis, <ratbert@radiks.net>,
 14 *     Copyright (c) 2002 Martin Diehl, <mad@mdiehl.de>,
 15 *     All Rights Reserved.
 16 *     
 17 *     This program is free software; you can redistribute it and/or 
 18 *     modify it under the terms of the GNU General Public License as 
 19 *     published by the Free Software Foundation; either version 2 of 
 20 *     the License, or (at your option) any later version.
 21 * 
 22 *     This program is distributed in the hope that it will be useful,
 23 *     but WITHOUT ANY WARRANTY; without even the implied warranty of
 24 *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 25 *     GNU General Public License for more details.
 26 * 
 27 *     You should have received a copy of the GNU General Public License 
 28 *     along with this program; if not, see <http://www.gnu.org/licenses/>.
 29 *     
 30 ********************************************************************/
 31
 32#include <linux/module.h>
 33#include <linux/delay.h>
 34#include <linux/init.h>
 35
 36#include <net/irda/irda.h>
 37
 38#include "sir-dev.h"
 39
 40static int esi_open(struct sir_dev *);
 41static int esi_close(struct sir_dev *);
 42static int esi_change_speed(struct sir_dev *, unsigned);
 43static int esi_reset(struct sir_dev *);
 44
 45static struct dongle_driver esi = {
 46	.owner		= THIS_MODULE,
 47	.driver_name	= "JetEye PC ESI-9680 PC",
 48	.type		= IRDA_ESI_DONGLE,
 49	.open		= esi_open,
 50	.close		= esi_close,
 51	.reset		= esi_reset,
 52	.set_speed	= esi_change_speed,
 53};
 54
 55static int __init esi_sir_init(void)
 56{
 57	return irda_register_dongle(&esi);
 58}
 59
 60static void __exit esi_sir_cleanup(void)
 61{
 62	irda_unregister_dongle(&esi);
 63}
 64
 65static int esi_open(struct sir_dev *dev)
 66{
 67	struct qos_info *qos = &dev->qos;
 68
 69	/* Power up and set dongle to 9600 baud */
 70	sirdev_set_dtr_rts(dev, FALSE, TRUE);
 71
 72	qos->baud_rate.bits &= IR_9600|IR_19200|IR_115200;
 73	qos->min_turn_time.bits = 0x01; /* Needs at least 10 ms */
 74	irda_qos_bits_to_value(qos);
 75
 76	/* irda thread waits 50 msec for power settling */
 77
 78	return 0;
 79}
 80
 81static int esi_close(struct sir_dev *dev)
 82{
 83	/* Power off dongle */
 84	sirdev_set_dtr_rts(dev, FALSE, FALSE);
 85
 86	return 0;
 87}
 88
 89/*
 90 * Function esi_change_speed (task)
 91 *
 92 * Set the speed for the Extended Systems JetEye PC ESI-9680 type dongle
 93 * Apparently (see old esi-driver) no delays are needed here...
 94 *
 95 */
 96static int esi_change_speed(struct sir_dev *dev, unsigned speed)
 97{
 98	int ret = 0;
 99	int dtr, rts;
100	
101	switch (speed) {
102	case 19200:
103		dtr = TRUE;
104		rts = FALSE;
105		break;
106	case 115200:
107		dtr = rts = TRUE;
108		break;
109	default:
110		ret = -EINVAL;
111		speed = 9600;
112		/* fall through */
113	case 9600:
114		dtr = FALSE;
115		rts = TRUE;
116		break;
117	}
118
119	/* Change speed of dongle */
120	sirdev_set_dtr_rts(dev, dtr, rts);
121	dev->speed = speed;
122
123	return ret;
124}
125
126/*
127 * Function esi_reset (task)
128 *
129 *    Reset dongle;
130 *
131 */
132static int esi_reset(struct sir_dev *dev)
133{
134	sirdev_set_dtr_rts(dev, FALSE, FALSE);
135
136	/* Hm, the old esi-driver left the dongle unpowered relying on
137	 * the following speed change to repower. This might work for
138	 * the esi because we only need the modem lines. However, now the
139	 * general rule is reset must bring the dongle to some working
140	 * well-known state because speed change might write to registers.
141	 * The old esi-driver didn't any delay here - let's hope it' fine.
142	 */
143
144	sirdev_set_dtr_rts(dev, FALSE, TRUE);
145	dev->speed = 9600;
146
147	return 0;
148}
149
150MODULE_AUTHOR("Dag Brattli <dagb@cs.uit.no>");
151MODULE_DESCRIPTION("Extended Systems JetEye PC dongle driver");
152MODULE_LICENSE("GPL");
153MODULE_ALIAS("irda-dongle-1"); /* IRDA_ESI_DONGLE */
154
155module_init(esi_sir_init);
156module_exit(esi_sir_cleanup);
157