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1da177e4 LT |
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 | |
e8478de3 | 28 | * along with this program; if not, see <http://www.gnu.org/licenses/>. |
1da177e4 LT |
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 | ||
40 | static int esi_open(struct sir_dev *); | |
41 | static int esi_close(struct sir_dev *); | |
42 | static int esi_change_speed(struct sir_dev *, unsigned); | |
43 | static int esi_reset(struct sir_dev *); | |
44 | ||
45 | static 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 | ||
55 | static int __init esi_sir_init(void) | |
56 | { | |
57 | return irda_register_dongle(&esi); | |
58 | } | |
59 | ||
60 | static void __exit esi_sir_cleanup(void) | |
61 | { | |
62 | irda_unregister_dongle(&esi); | |
63 | } | |
64 | ||
65 | static 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 | ||
81 | static 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 | */ | |
96 | static 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 | */ | |
132 | static 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 | ||
150 | MODULE_AUTHOR("Dag Brattli <dagb@cs.uit.no>"); | |
151 | MODULE_DESCRIPTION("Extended Systems JetEye PC dongle driver"); | |
152 | MODULE_LICENSE("GPL"); | |
153 | MODULE_ALIAS("irda-dongle-1"); /* IRDA_ESI_DONGLE */ | |
154 | ||
155 | module_init(esi_sir_init); | |
156 | module_exit(esi_sir_cleanup); | |
157 |