1 /*********************************************************************
2 *
3 * Filename: old_belkin.c
4 * Version: 1.1
5 * Description: Driver for the Belkin (old) SmartBeam dongle
6 * Status: Experimental...
7 * Author: Jean Tourrilhes <jt@hpl.hp.com>
8 * Created at: 22/11/99
9 * Modified at: Fri Dec 17 09:13:32 1999
10 * Modified by: Dag Brattli <dagb@cs.uit.no>
11 *
12 * Copyright (c) 1999 Jean Tourrilhes, All Rights Reserved.
13 *
14 * This program is free software; you can redistribute it and/or
15 * modify it under the terms of the GNU General Public License as
16 * published by the Free Software Foundation; either version 2 of
17 * the License, or (at your option) any later version.
18 *
19 * This program is distributed in the hope that it will be useful,
20 * but WITHOUT ANY WARRANTY; without even the implied warranty of
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 * GNU General Public License for more details.
23 *
24 * You should have received a copy of the GNU General Public License
25 * along with this program; if not, see <http://www.gnu.org/licenses/>.
26 *
27 ********************************************************************/
28
29 #include <linux/module.h>
30 #include <linux/delay.h>
31 #include <linux/init.h>
32
33 #include <net/irda/irda.h>
34 // #include <net/irda/irda_device.h>
35
36 #include "sir-dev.h"
37
38 /*
39 * Belkin is selling a dongle called the SmartBeam.
40 * In fact, there is two hardware version of this dongle, of course with
41 * the same name and looking the exactly same (grrr...).
42 * I guess that I've got the old one, because inside I don't have
43 * a jumper for IrDA/ASK...
44 *
45 * As far as I can make it from info on their web site, the old dongle
46 * support only 9600 b/s, which make our life much simpler as far as
47 * the driver is concerned, but you might not like it very much ;-)
48 * The new SmartBeam does 115 kb/s, and I've not tested it...
49 *
50 * Belkin claim that the correct driver for the old dongle (in Windows)
51 * is the generic Parallax 9500a driver, but the Linux LiteLink driver
52 * fails for me (probably because Linux-IrDA doesn't rate fallback),
53 * so I created this really dumb driver...
54 *
55 * In fact, this driver doesn't do much. The only thing it does is to
56 * prevent Linux-IrDA to use any other speed than 9600 b/s ;-) This
57 * driver is called "old_belkin" so that when the new SmartBeam is supported
58 * its driver can be called "belkin" instead of "new_belkin".
59 *
60 * Note : this driver was written without any info/help from Belkin,
61 * so a lot of info here might be totally wrong. Blame me ;-)
62 */
63
64 static int old_belkin_open(struct sir_dev *dev);
65 static int old_belkin_close(struct sir_dev *dev);
66 static int old_belkin_change_speed(struct sir_dev *dev, unsigned speed);
67 static int old_belkin_reset(struct sir_dev *dev);
68
69 static struct dongle_driver old_belkin = {
70 .owner = THIS_MODULE,
71 .driver_name = "Old Belkin SmartBeam",
72 .type = IRDA_OLD_BELKIN_DONGLE,
73 .open = old_belkin_open,
74 .close = old_belkin_close,
75 .reset = old_belkin_reset,
76 .set_speed = old_belkin_change_speed,
77 };
78
old_belkin_sir_init(void)79 static int __init old_belkin_sir_init(void)
80 {
81 return irda_register_dongle(&old_belkin);
82 }
83
old_belkin_sir_cleanup(void)84 static void __exit old_belkin_sir_cleanup(void)
85 {
86 irda_unregister_dongle(&old_belkin);
87 }
88
old_belkin_open(struct sir_dev * dev)89 static int old_belkin_open(struct sir_dev *dev)
90 {
91 struct qos_info *qos = &dev->qos;
92
93 /* Power on dongle */
94 sirdev_set_dtr_rts(dev, TRUE, TRUE);
95
96 /* Not too fast, please... */
97 qos->baud_rate.bits &= IR_9600;
98 /* Needs at least 10 ms (totally wild guess, can do probably better) */
99 qos->min_turn_time.bits = 0x01;
100 irda_qos_bits_to_value(qos);
101
102 /* irda thread waits 50 msec for power settling */
103
104 return 0;
105 }
106
old_belkin_close(struct sir_dev * dev)107 static int old_belkin_close(struct sir_dev *dev)
108 {
109 /* Power off dongle */
110 sirdev_set_dtr_rts(dev, FALSE, FALSE);
111
112 return 0;
113 }
114
115 /*
116 * Function old_belkin_change_speed (task)
117 *
118 * With only one speed available, not much to do...
119 */
old_belkin_change_speed(struct sir_dev * dev,unsigned speed)120 static int old_belkin_change_speed(struct sir_dev *dev, unsigned speed)
121 {
122 dev->speed = 9600;
123 return (speed==dev->speed) ? 0 : -EINVAL;
124 }
125
126 /*
127 * Function old_belkin_reset (task)
128 *
129 * Reset the Old-Belkin type dongle.
130 *
131 */
old_belkin_reset(struct sir_dev * dev)132 static int old_belkin_reset(struct sir_dev *dev)
133 {
134 /* This dongles speed "defaults" to 9600 bps ;-) */
135 dev->speed = 9600;
136
137 return 0;
138 }
139
140 MODULE_AUTHOR("Jean Tourrilhes <jt@hpl.hp.com>");
141 MODULE_DESCRIPTION("Belkin (old) SmartBeam dongle driver");
142 MODULE_LICENSE("GPL");
143 MODULE_ALIAS("irda-dongle-7"); /* IRDA_OLD_BELKIN_DONGLE */
144
145 module_init(old_belkin_sir_init);
146 module_exit(old_belkin_sir_cleanup);
147