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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, write to the Free Software | |
26 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, | |
27 | * MA 02111-1307 USA | |
28 | * | |
29 | ********************************************************************/ | |
30 | ||
31 | #include <linux/module.h> | |
32 | #include <linux/delay.h> | |
33 | #include <linux/init.h> | |
34 | ||
35 | #include <net/irda/irda.h> | |
36 | // #include <net/irda/irda_device.h> | |
37 | ||
38 | #include "sir-dev.h" | |
39 | ||
40 | /* | |
41 | * Belkin is selling a dongle called the SmartBeam. | |
42 | * In fact, there is two hardware version of this dongle, of course with | |
43 | * the same name and looking the exactly same (grrr...). | |
44 | * I guess that I've got the old one, because inside I don't have | |
45 | * a jumper for IrDA/ASK... | |
46 | * | |
47 | * As far as I can make it from info on their web site, the old dongle | |
48 | * support only 9600 b/s, which make our life much simpler as far as | |
49 | * the driver is concerned, but you might not like it very much ;-) | |
50 | * The new SmartBeam does 115 kb/s, and I've not tested it... | |
51 | * | |
52 | * Belkin claim that the correct driver for the old dongle (in Windows) | |
53 | * is the generic Parallax 9500a driver, but the Linux LiteLink driver | |
54 | * fails for me (probably because Linux-IrDA doesn't rate fallback), | |
55 | * so I created this really dumb driver... | |
56 | * | |
57 | * In fact, this driver doesn't do much. The only thing it does is to | |
58 | * prevent Linux-IrDA to use any other speed than 9600 b/s ;-) This | |
59 | * driver is called "old_belkin" so that when the new SmartBeam is supported | |
60 | * its driver can be called "belkin" instead of "new_belkin". | |
61 | * | |
62 | * Note : this driver was written without any info/help from Belkin, | |
63 | * so a lot of info here might be totally wrong. Blame me ;-) | |
64 | */ | |
65 | ||
66 | static int old_belkin_open(struct sir_dev *dev); | |
67 | static int old_belkin_close(struct sir_dev *dev); | |
68 | static int old_belkin_change_speed(struct sir_dev *dev, unsigned speed); | |
69 | static int old_belkin_reset(struct sir_dev *dev); | |
70 | ||
71 | static struct dongle_driver old_belkin = { | |
72 | .owner = THIS_MODULE, | |
73 | .driver_name = "Old Belkin SmartBeam", | |
74 | .type = IRDA_OLD_BELKIN_DONGLE, | |
75 | .open = old_belkin_open, | |
76 | .close = old_belkin_close, | |
77 | .reset = old_belkin_reset, | |
78 | .set_speed = old_belkin_change_speed, | |
79 | }; | |
80 | ||
81 | static int __init old_belkin_sir_init(void) | |
82 | { | |
83 | return irda_register_dongle(&old_belkin); | |
84 | } | |
85 | ||
86 | static void __exit old_belkin_sir_cleanup(void) | |
87 | { | |
88 | irda_unregister_dongle(&old_belkin); | |
89 | } | |
90 | ||
91 | static int old_belkin_open(struct sir_dev *dev) | |
92 | { | |
93 | struct qos_info *qos = &dev->qos; | |
94 | ||
a97a6f10 | 95 | IRDA_DEBUG(2, "%s()\n", __func__); |
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96 | |
97 | /* Power on dongle */ | |
98 | sirdev_set_dtr_rts(dev, TRUE, TRUE); | |
99 | ||
100 | /* Not too fast, please... */ | |
101 | qos->baud_rate.bits &= IR_9600; | |
102 | /* Needs at least 10 ms (totally wild guess, can do probably better) */ | |
103 | qos->min_turn_time.bits = 0x01; | |
104 | irda_qos_bits_to_value(qos); | |
105 | ||
106 | /* irda thread waits 50 msec for power settling */ | |
107 | ||
108 | return 0; | |
109 | } | |
110 | ||
111 | static int old_belkin_close(struct sir_dev *dev) | |
112 | { | |
a97a6f10 | 113 | IRDA_DEBUG(2, "%s()\n", __func__); |
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114 | |
115 | /* Power off dongle */ | |
116 | sirdev_set_dtr_rts(dev, FALSE, FALSE); | |
117 | ||
118 | return 0; | |
119 | } | |
120 | ||
121 | /* | |
122 | * Function old_belkin_change_speed (task) | |
123 | * | |
124 | * With only one speed available, not much to do... | |
125 | */ | |
126 | static int old_belkin_change_speed(struct sir_dev *dev, unsigned speed) | |
127 | { | |
a97a6f10 | 128 | IRDA_DEBUG(2, "%s()\n", __func__); |
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129 | |
130 | dev->speed = 9600; | |
131 | return (speed==dev->speed) ? 0 : -EINVAL; | |
132 | } | |
133 | ||
134 | /* | |
135 | * Function old_belkin_reset (task) | |
136 | * | |
137 | * Reset the Old-Belkin type dongle. | |
138 | * | |
139 | */ | |
140 | static int old_belkin_reset(struct sir_dev *dev) | |
141 | { | |
a97a6f10 | 142 | IRDA_DEBUG(2, "%s()\n", __func__); |
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143 | |
144 | /* This dongles speed "defaults" to 9600 bps ;-) */ | |
145 | dev->speed = 9600; | |
146 | ||
147 | return 0; | |
148 | } | |
149 | ||
150 | MODULE_AUTHOR("Jean Tourrilhes <jt@hpl.hp.com>"); | |
151 | MODULE_DESCRIPTION("Belkin (old) SmartBeam dongle driver"); | |
152 | MODULE_LICENSE("GPL"); | |
153 | MODULE_ALIAS("irda-dongle-7"); /* IRDA_OLD_BELKIN_DONGLE */ | |
154 | ||
155 | module_init(old_belkin_sir_init); | |
156 | module_exit(old_belkin_sir_cleanup); |