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
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
esi_sir_init(void)55 static int __init esi_sir_init(void)
56 {
57 return irda_register_dongle(&esi);
58 }
59
esi_sir_cleanup(void)60 static void __exit esi_sir_cleanup(void)
61 {
62 irda_unregister_dongle(&esi);
63 }
64
esi_open(struct sir_dev * dev)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
esi_close(struct sir_dev * dev)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 */
esi_change_speed(struct sir_dev * dev,unsigned speed)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 */
esi_reset(struct sir_dev * dev)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
158