1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
|
/*********************************************************************
*
* Filename: girbil.c
* Version: 1.2
* Description: Implementation for the Greenwich GIrBIL dongle
* Status: Experimental.
* Author: Dag Brattli <dagb@cs.uit.no>
* Created at: Sat Feb 6 21:02:33 1999
* Modified at: Fri Dec 17 09:13:20 1999
* Modified by: Dag Brattli <dagb@cs.uit.no>
*
* Copyright (c) 1999 Dag Brattli, All Rights Reserved.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* Neither Dag Brattli nor University of Tromsø admit liability nor
* provide warranty for any of this software. This material is
* provided "AS-IS" and at no charge.
*
********************************************************************/
#include <linux/module.h>
#include <linux/delay.h>
#include <linux/init.h>
#include <net/irda/irda.h>
#include "sir-dev.h"
static int girbil_reset(struct sir_dev *dev);
static int girbil_open(struct sir_dev *dev);
static int girbil_close(struct sir_dev *dev);
static int girbil_change_speed(struct sir_dev *dev, unsigned speed);
/* Control register 1 */
#define GIRBIL_TXEN 0x01 /* Enable transmitter */
#define GIRBIL_RXEN 0x02 /* Enable receiver */
#define GIRBIL_ECAN 0x04 /* Cancel self emitted data */
#define GIRBIL_ECHO 0x08 /* Echo control characters */
/* LED Current Register (0x2) */
#define GIRBIL_HIGH 0x20
#define GIRBIL_MEDIUM 0x21
#define GIRBIL_LOW 0x22
/* Baud register (0x3) */
#define GIRBIL_2400 0x30
#define GIRBIL_4800 0x31
#define GIRBIL_9600 0x32
#define GIRBIL_19200 0x33
#define GIRBIL_38400 0x34
#define GIRBIL_57600 0x35
#define GIRBIL_115200 0x36
/* Mode register (0x4) */
#define GIRBIL_IRDA 0x40
#define GIRBIL_ASK 0x41
/* Control register 2 (0x5) */
#define GIRBIL_LOAD 0x51 /* Load the new baud rate value */
static struct dongle_driver girbil = {
.owner = THIS_MODULE,
.driver_name = "Greenwich GIrBIL",
.type = IRDA_GIRBIL_DONGLE,
.open = girbil_open,
.close = girbil_close,
.reset = girbil_reset,
.set_speed = girbil_change_speed,
};
static int __init girbil_sir_init(void)
{
return irda_register_dongle(&girbil);
}
static void __exit girbil_sir_cleanup(void)
{
irda_unregister_dongle(&girbil);
}
static int girbil_open(struct sir_dev *dev)
{
struct qos_info *qos = &dev->qos;
IRDA_DEBUG(2, "%s()\n", __func__);
/* Power on dongle */
sirdev_set_dtr_rts(dev, TRUE, TRUE);
qos->baud_rate.bits &= IR_9600|IR_19200|IR_38400|IR_57600|IR_115200;
qos->min_turn_time.bits = 0x03;
irda_qos_bits_to_value(qos);
/* irda thread waits 50 msec for power settling */
return 0;
}
static int girbil_close(struct sir_dev *dev)
{
IRDA_DEBUG(2, "%s()\n", __func__);
/* Power off dongle */
sirdev_set_dtr_rts(dev, FALSE, FALSE);
return 0;
}
/*
* Function girbil_change_speed (dev, speed)
*
* Set the speed for the Girbil type dongle.
*
*/
#define GIRBIL_STATE_WAIT_SPEED (SIRDEV_STATE_DONGLE_SPEED + 1)
static int girbil_change_speed(struct sir_dev *dev, unsigned speed)
{
unsigned state = dev->fsm.substate;
unsigned delay = 0;
u8 control[2];
static int ret = 0;
IRDA_DEBUG(2, "%s()\n", __func__);
/* dongle alread reset - port and dongle at default speed */
switch(state) {
case SIRDEV_STATE_DONGLE_SPEED:
/* Set DTR and Clear RTS to enter command mode */
sirdev_set_dtr_rts(dev, FALSE, TRUE);
udelay(25); /* better wait a little while */
ret = 0;
switch (speed) {
default:
ret = -EINVAL;
/* fall through */
case 9600:
control[0] = GIRBIL_9600;
break;
case 19200:
control[0] = GIRBIL_19200;
break;
case 34800:
control[0] = GIRBIL_38400;
break;
case 57600:
control[0] = GIRBIL_57600;
break;
case 115200:
control[0] = GIRBIL_115200;
break;
}
control[1] = GIRBIL_LOAD;
/* Write control bytes */
sirdev_raw_write(dev, control, 2);
dev->speed = speed;
state = GIRBIL_STATE_WAIT_SPEED;
delay = 100;
break;
case GIRBIL_STATE_WAIT_SPEED:
/* Go back to normal mode */
sirdev_set_dtr_rts(dev, TRUE, TRUE);
udelay(25); /* better wait a little while */
break;
default:
IRDA_ERROR("%s - undefined state %d\n", __func__, state);
ret = -EINVAL;
break;
}
dev->fsm.substate = state;
return (delay > 0) ? delay : ret;
}
/*
* Function girbil_reset (driver)
*
* This function resets the girbil dongle.
*
* Algorithm:
* 0. set RTS, and wait at least 5 ms
* 1. clear RTS
*/
#define GIRBIL_STATE_WAIT1_RESET (SIRDEV_STATE_DONGLE_RESET + 1)
#define GIRBIL_STATE_WAIT2_RESET (SIRDEV_STATE_DONGLE_RESET + 2)
#define GIRBIL_STATE_WAIT3_RESET (SIRDEV_STATE_DONGLE_RESET + 3)
static int girbil_reset(struct sir_dev *dev)
{
unsigned state = dev->fsm.substate;
unsigned delay = 0;
u8 control = GIRBIL_TXEN | GIRBIL_RXEN;
int ret = 0;
IRDA_DEBUG(2, "%s()\n", __func__);
switch (state) {
case SIRDEV_STATE_DONGLE_RESET:
/* Reset dongle */
sirdev_set_dtr_rts(dev, TRUE, FALSE);
/* Sleep at least 5 ms */
delay = 20;
state = GIRBIL_STATE_WAIT1_RESET;
break;
case GIRBIL_STATE_WAIT1_RESET:
/* Set DTR and clear RTS to enter command mode */
sirdev_set_dtr_rts(dev, FALSE, TRUE);
delay = 20;
state = GIRBIL_STATE_WAIT2_RESET;
break;
case GIRBIL_STATE_WAIT2_RESET:
/* Write control byte */
sirdev_raw_write(dev, &control, 1);
delay = 20;
state = GIRBIL_STATE_WAIT3_RESET;
break;
case GIRBIL_STATE_WAIT3_RESET:
/* Go back to normal mode */
sirdev_set_dtr_rts(dev, TRUE, TRUE);
dev->speed = 9600;
break;
default:
IRDA_ERROR("%s(), undefined state %d\n", __func__, state);
ret = -1;
break;
}
dev->fsm.substate = state;
return (delay > 0) ? delay : ret;
}
MODULE_AUTHOR("Dag Brattli <dagb@cs.uit.no>");
MODULE_DESCRIPTION("Greenwich GIrBIL dongle driver");
MODULE_LICENSE("GPL");
MODULE_ALIAS("irda-dongle-4"); /* IRDA_GIRBIL_DONGLE */
module_init(girbil_sir_init);
module_exit(girbil_sir_cleanup);
|
