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
158