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
160