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
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
|
/*********************************************************************
*
* Filename: tekram.c
* Version: 1.2
* Description: Implementation of the Tekram IrMate IR-210B dongle
* Status: Experimental.
* Author: Dag Brattli <dagb@cs.uit.no>
* Created at: Wed Oct 21 20:02:35 1998
* Modified at: Fri Dec 17 09:13:09 1999
* Modified by: Dag Brattli <dagb@cs.uit.no>
*
* Copyright (c) 1998-1999 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/tty.h>
#include <linux/init.h>
#include <net/irda/irda.h>
#include <net/irda/irda_device.h>
static void tekram_open(dongle_t *self, struct qos_info *qos);
static void tekram_close(dongle_t *self);
static int tekram_change_speed(struct irda_task *task);
static int tekram_reset(struct irda_task *task);
#define TEKRAM_115200 0x00
#define TEKRAM_57600 0x01
#define TEKRAM_38400 0x02
#define TEKRAM_19200 0x03
#define TEKRAM_9600 0x04
#define TEKRAM_PW 0x10 /* Pulse select bit */
static struct dongle_reg dongle = {
.type = IRDA_TEKRAM_DONGLE,
.open = tekram_open,
.close = tekram_close,
.reset = tekram_reset,
.change_speed = tekram_change_speed,
.owner = THIS_MODULE,
};
static int __init tekram_init(void)
{
return irda_device_register_dongle(&dongle);
}
static void __exit tekram_cleanup(void)
{
irda_device_unregister_dongle(&dongle);
}
static void tekram_open(dongle_t *self, struct qos_info *qos)
{
IRDA_DEBUG(2, "%s()\n", __FUNCTION__ );
qos->baud_rate.bits &= IR_9600|IR_19200|IR_38400|IR_57600|IR_115200;
qos->min_turn_time.bits = 0x01; /* Needs at least 10 ms */
irda_qos_bits_to_value(qos);
}
static void tekram_close(dongle_t *self)
{
IRDA_DEBUG(2, "%s()\n", __FUNCTION__ );
/* Power off dongle */
self->set_dtr_rts(self->dev, FALSE, FALSE);
if (self->reset_task)
irda_task_delete(self->reset_task);
if (self->speed_task)
irda_task_delete(self->speed_task);
}
/*
* Function tekram_change_speed (dev, state, speed)
*
* Set the speed for the Tekram IRMate 210 type dongle. Warning, this
* function must be called with a process context!
*
* Algorithm
* 1. clear DTR
* 2. set RTS, and wait at least 7 us
* 3. send Control Byte to the IR-210 through TXD to set new baud rate
* wait until the stop bit of Control Byte is sent (for 9600 baud rate,
* it takes about 100 msec)
* 5. clear RTS (return to NORMAL Operation)
* 6. wait at least 50 us, new setting (baud rate, etc) takes effect here
* after
*/
static int tekram_change_speed(struct irda_task *task)
{
dongle_t *self = (dongle_t *) task->instance;
__u32 speed = (__u32) task->param;
__u8 byte;
int ret = 0;
IRDA_DEBUG(2, "%s()\n", __FUNCTION__ );
IRDA_ASSERT(task != NULL, return -1;);
if (self->speed_task && self->speed_task != task) {
IRDA_DEBUG(0, "%s(), busy!\n", __FUNCTION__ );
return msecs_to_jiffies(10);
} else
self->speed_task = task;
switch (speed) {
default:
case 9600:
byte = TEKRAM_PW|TEKRAM_9600;
break;
case 19200:
byte = TEKRAM_PW|TEKRAM_19200;
break;
case 38400:
byte = TEKRAM_PW|TEKRAM_38400;
break;
case 57600:
byte = TEKRAM_PW|TEKRAM_57600;
break;
case 115200:
byte = TEKRAM_115200;
break;
}
switch (task->state) {
case IRDA_TASK_INIT:
case IRDA_TASK_CHILD_INIT:
/*
* Need to reset the dongle and go to 9600 bps before
* programming
*/
if (irda_task_execute(self, tekram_reset, NULL, task,
(void *) speed))
{
/* Dongle need more time to reset */
irda_task_next_state(task, IRDA_TASK_CHILD_WAIT);
/* Give reset 1 sec to finish */
ret = msecs_to_jiffies(1000);
} else
irda_task_next_state(task, IRDA_TASK_CHILD_DONE);
break;
case IRDA_TASK_CHILD_WAIT:
IRDA_WARNING("%s(), resetting dongle timed out!\n",
__FUNCTION__);
ret = -1;
break;
case IRDA_TASK_CHILD_DONE:
/* Set DTR, Clear RTS */
self->set_dtr_rts(self->dev, TRUE, FALSE);
/* Wait at least 7us */
udelay(14);
/* Write control byte */
self->write(self->dev, &byte, 1);
irda_task_next_state(task, IRDA_TASK_WAIT);
/* Wait at least 100 ms */
ret = msecs_to_jiffies(150);
break;
case IRDA_TASK_WAIT:
/* Set DTR, Set RTS */
self->set_dtr_rts(self->dev, TRUE, TRUE);
irda_task_next_state(task, IRDA_TASK_DONE);
self->speed_task = NULL;
break;
default:
IRDA_ERROR("%s(), unknown state %d\n",
__FUNCTION__, task->state);
irda_task_next_state(task, IRDA_TASK_DONE);
self->speed_task = NULL;
ret = -1;
break;
}
return ret;
}
/*
* Function tekram_reset (driver)
*
* This function resets the tekram dongle. Warning, this function
* must be called with a process context!!
*
* Algorithm:
* 0. Clear RTS and DTR, and wait 50 ms (power off the IR-210 )
* 1. clear RTS
* 2. set DTR, and wait at least 1 ms
* 3. clear DTR to SPACE state, wait at least 50 us for further
* operation
*/
int tekram_reset(struct irda_task *task)
{
dongle_t *self = (dongle_t *) task->instance;
int ret = 0;
IRDA_DEBUG(2, "%s()\n", __FUNCTION__ );
IRDA_ASSERT(task != NULL, return -1;);
if (self->reset_task && self->reset_task != task) {
IRDA_DEBUG(0, "%s(), busy!\n", __FUNCTION__ );
return msecs_to_jiffies(10);
} else
self->reset_task = task;
/* Power off dongle */
//self->set_dtr_rts(self->dev, FALSE, FALSE);
self->set_dtr_rts(self->dev, TRUE, TRUE);
switch (task->state) {
case IRDA_TASK_INIT:
irda_task_next_state(task, IRDA_TASK_WAIT1);
/* Sleep 50 ms */
ret = msecs_to_jiffies(50);
break;
case IRDA_TASK_WAIT1:
/* Clear DTR, Set RTS */
self->set_dtr_rts(self->dev, FALSE, TRUE);
irda_task_next_state(task, IRDA_TASK_WAIT2);
/* Should sleep 1 ms */
ret = msecs_to_jiffies(1);
break;
case IRDA_TASK_WAIT2:
/* Set DTR, Set RTS */
self->set_dtr_rts(self->dev, TRUE, TRUE);
/* Wait at least 50 us */
udelay(75);
irda_task_next_state(task, IRDA_TASK_DONE);
self->reset_task = NULL;
break;
default:
IRDA_ERROR("%s(), unknown state %d\n",
__FUNCTION__, task->state);
irda_task_next_state(task, IRDA_TASK_DONE);
self->reset_task = NULL;
ret = -1;
}
return ret;
}
MODULE_AUTHOR("Dag Brattli <dagb@cs.uit.no>");
MODULE_DESCRIPTION("Tekram IrMate IR-210B dongle driver");
MODULE_LICENSE("GPL");
MODULE_ALIAS("irda-dongle-0"); /* IRDA_TEKRAM_DONGLE */
/*
* Function init_module (void)
*
* Initialize Tekram module
*
*/
module_init(tekram_init);
/*
* Function cleanup_module (void)
*
* Cleanup Tekram module
*
*/
module_exit(tekram_cleanup);
|
