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, write to the Free Software 
 29 *     Foundation, Inc., 59 Temple Place, Suite 330, Boston, 
 30 *     MA 02111-1307 USA
 31 *     
 32 ********************************************************************/
 33
 34#include <linux/module.h>
 35#include <linux/delay.h>
 36#include <linux/init.h>
 37
 38#include <net/irda/irda.h>
 39
 40#include "sir-dev.h"
 41
 42static int esi_open(struct sir_dev *);
 43static int esi_close(struct sir_dev *);
 44static int esi_change_speed(struct sir_dev *, unsigned);
 45static int esi_reset(struct sir_dev *);
 46
 47static struct dongle_driver esi = {
 48	.owner		= THIS_MODULE,
 49	.driver_name	= "JetEye PC ESI-9680 PC",
 50	.type		= IRDA_ESI_DONGLE,
 51	.open		= esi_open,
 52	.close		= esi_close,
 53	.reset		= esi_reset,
 54	.set_speed	= esi_change_speed,
 55};
 56
 57static int __init esi_sir_init(void)
 58{
 59	return irda_register_dongle(&esi);
 60}
 61
 62static void __exit esi_sir_cleanup(void)
 63{
 64	irda_unregister_dongle(&esi);
 65}
 66
 67static int esi_open(struct sir_dev *dev)
 68{
 69	struct qos_info *qos = &dev->qos;
 70
 71	/* Power up and set dongle to 9600 baud */
 72	sirdev_set_dtr_rts(dev, FALSE, TRUE);
 73
 74	qos->baud_rate.bits &= IR_9600|IR_19200|IR_115200;
 75	qos->min_turn_time.bits = 0x01; /* Needs at least 10 ms */
 76	irda_qos_bits_to_value(qos);
 77
 78	/* irda thread waits 50 msec for power settling */
 79
 80	return 0;
 81}
 82
 83static int esi_close(struct sir_dev *dev)
 84{
 85	/* Power off dongle */
 86	sirdev_set_dtr_rts(dev, FALSE, FALSE);
 87
 88	return 0;
 89}
 90
 91/*
 92 * Function esi_change_speed (task)
 93 *
 94 * Set the speed for the Extended Systems JetEye PC ESI-9680 type dongle
 95 * Apparently (see old esi-driver) no delays are needed here...
 96 *
 97 */
 98static int esi_change_speed(struct sir_dev *dev, unsigned speed)
 99{
100	int ret = 0;
101	int dtr, rts;
102	
103	switch (speed) {
104	case 19200:
105		dtr = TRUE;
106		rts = FALSE;
107		break;
108	case 115200:
109		dtr = rts = TRUE;
110		break;
111	default:
112		ret = -EINVAL;
113		speed = 9600;
114		/* fall through */
115	case 9600:
116		dtr = FALSE;
117		rts = TRUE;
118		break;
119	}
120
121	/* Change speed of dongle */
122	sirdev_set_dtr_rts(dev, dtr, rts);
123	dev->speed = speed;
124
125	return ret;
126}
127
128/*
129 * Function esi_reset (task)
130 *
131 *    Reset dongle;
132 *
133 */
134static int esi_reset(struct sir_dev *dev)
135{
136	sirdev_set_dtr_rts(dev, FALSE, FALSE);
137
138	/* Hm, the old esi-driver left the dongle unpowered relying on
139	 * the following speed change to repower. This might work for
140	 * the esi because we only need the modem lines. However, now the
141	 * general rule is reset must bring the dongle to some working
142	 * well-known state because speed change might write to registers.
143	 * The old esi-driver didn't any delay here - let's hope it' fine.
144	 */
145
146	sirdev_set_dtr_rts(dev, FALSE, TRUE);
147	dev->speed = 9600;
148
149	return 0;
150}
151
152MODULE_AUTHOR("Dag Brattli <dagb@cs.uit.no>");
153MODULE_DESCRIPTION("Extended Systems JetEye PC dongle driver");
154MODULE_LICENSE("GPL");
155MODULE_ALIAS("irda-dongle-1"); /* IRDA_ESI_DONGLE */
156
157module_init(esi_sir_init);
158module_exit(esi_sir_cleanup);
159