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
|
/*********************************************************************
*
* Filename: act200l.c
* Version: 0.8
* Description: Implementation for the ACTiSYS ACT-IR200L dongle
* Status: Experimental.
* Author: SHIMIZU Takuya <tshimizu@ga2.so-net.ne.jp>
* Created at: Fri Aug 3 17:35:42 2001
* Modified at: Fri Aug 17 10:22:40 2001
* Modified by: SHIMIZU Takuya <tshimizu@ga2.so-net.ne.jp>
*
* Copyright (c) 2001 SHIMIZU Takuya, 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.
*
********************************************************************/
#include <linux/module.h>
#include <linux/delay.h>
#include <linux/init.h>
#include <net/irda/irda.h>
#include "sir-dev.h"
static int act200l_reset(struct sir_dev *dev);
static int act200l_open(struct sir_dev *dev);
static int act200l_close(struct sir_dev *dev);
static int act200l_change_speed(struct sir_dev *dev, unsigned speed);
/* Regsiter 0: Control register #1 */
#define ACT200L_REG0 0x00
#define ACT200L_TXEN 0x01 /* Enable transmitter */
#define ACT200L_RXEN 0x02 /* Enable receiver */
/* Register 1: Control register #2 */
#define ACT200L_REG1 0x10
#define ACT200L_LODB 0x01 /* Load new baud rate count value */
#define ACT200L_WIDE 0x04 /* Expand the maximum allowable pulse */
/* Register 4: Output Power register */
#define ACT200L_REG4 0x40
#define ACT200L_OP0 0x01 /* Enable LED1C output */
#define ACT200L_OP1 0x02 /* Enable LED2C output */
#define ACT200L_BLKR 0x04
/* Register 5: Receive Mode register */
#define ACT200L_REG5 0x50
#define ACT200L_RWIDL 0x01 /* fixed 1.6us pulse mode */
/* Register 6: Receive Sensitivity register #1 */
#define ACT200L_REG6 0x60
#define ACT200L_RS0 0x01 /* receive threshold bit 0 */
#define ACT200L_RS1 0x02 /* receive threshold bit 1 */
/* Register 7: Receive Sensitivity register #2 */
#define ACT200L_REG7 0x70
#define ACT200L_ENPOS 0x04 /* Ignore the falling edge */
/* Register 8,9: Baud Rate Dvider register #1,#2 */
#define ACT200L_REG8 0x80
#define ACT200L_REG9 0x90
#define ACT200L_2400 0x5f
#define ACT200L_9600 0x17
#define ACT200L_19200 0x0b
#define ACT200L_38400 0x05
#define ACT200L_57600 0x03
#define ACT200L_115200 0x01
/* Register 13: Control register #3 */
#define ACT200L_REG13 0xd0
#define ACT200L_SHDW 0x01 /* Enable access to shadow registers */
/* Register 15: Status register */
#define ACT200L_REG15 0xf0
/* Register 21: Control register #4 */
#define ACT200L_REG21 0x50
#define ACT200L_EXCK 0x02 /* Disable clock output driver */
#define ACT200L_OSCL 0x04 /* oscillator in low power, medium accuracy mode */
static struct dongle_driver act200l = {
.owner = THIS_MODULE,
.driver_name = "ACTiSYS ACT-IR200L",
.type = IRDA_ACT200L_DONGLE,
.open = act200l_open,
.close = act200l_close,
.reset = act200l_reset,
.set_speed = act200l_change_speed,
};
static int __init act200l_sir_init(void)
{
return irda_register_dongle(&act200l);
}
static void __exit act200l_sir_cleanup(void)
{
irda_unregister_dongle(&act200l);
}
static int act200l_open(struct sir_dev *dev)
{
struct qos_info *qos = &dev->qos;
IRDA_DEBUG(2, "%s()\n", __func__ );
/* Power on the dongle */
sirdev_set_dtr_rts(dev, TRUE, TRUE);
/* Set the speeds we can accept */
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 act200l_close(struct sir_dev *dev)
{
IRDA_DEBUG(2, "%s()\n", __func__ );
/* Power off the dongle */
sirdev_set_dtr_rts(dev, FALSE, FALSE);
return 0;
}
/*
* Function act200l_change_speed (dev, speed)
*
* Set the speed for the ACTiSYS ACT-IR200L type dongle.
*
*/
static int act200l_change_speed(struct sir_dev *dev, unsigned speed)
{
u8 control[3];
int ret = 0;
IRDA_DEBUG(2, "%s()\n", __func__ );
/* Clear DTR and set RTS to enter command mode */
sirdev_set_dtr_rts(dev, FALSE, TRUE);
switch (speed) {
default:
ret = -EINVAL;
/* fall through */
case 9600:
control[0] = ACT200L_REG8 | (ACT200L_9600 & 0x0f);
control[1] = ACT200L_REG9 | ((ACT200L_9600 >> 4) & 0x0f);
break;
case 19200:
control[0] = ACT200L_REG8 | (ACT200L_19200 & 0x0f);
control[1] = ACT200L_REG9 | ((ACT200L_19200 >> 4) & 0x0f);
break;
case 38400:
control[0] = ACT200L_REG8 | (ACT200L_38400 & 0x0f);
control[1] = ACT200L_REG9 | ((ACT200L_38400 >> 4) & 0x0f);
break;
case 57600:
control[0] = ACT200L_REG8 | (ACT200L_57600 & 0x0f);
control[1] = ACT200L_REG9 | ((ACT200L_57600 >> 4) & 0x0f);
break;
case 115200:
control[0] = ACT200L_REG8 | (ACT200L_115200 & 0x0f);
control[1] = ACT200L_REG9 | ((ACT200L_115200 >> 4) & 0x0f);
break;
}
control[2] = ACT200L_REG1 | ACT200L_LODB | ACT200L_WIDE;
/* Write control bytes */
sirdev_raw_write(dev, control, 3);
msleep(5);
/* Go back to normal mode */
sirdev_set_dtr_rts(dev, TRUE, TRUE);
dev->speed = speed;
return ret;
}
/*
* Function act200l_reset (driver)
*
* Reset the ACTiSYS ACT-IR200L type dongle.
*/
#define ACT200L_STATE_WAIT1_RESET (SIRDEV_STATE_DONGLE_RESET+1)
#define ACT200L_STATE_WAIT2_RESET (SIRDEV_STATE_DONGLE_RESET+2)
static int act200l_reset(struct sir_dev *dev)
{
unsigned state = dev->fsm.substate;
unsigned delay = 0;
static const u8 control[9] = {
ACT200L_REG15,
ACT200L_REG13 | ACT200L_SHDW,
ACT200L_REG21 | ACT200L_EXCK | ACT200L_OSCL,
ACT200L_REG13,
ACT200L_REG7 | ACT200L_ENPOS,
ACT200L_REG6 | ACT200L_RS0 | ACT200L_RS1,
ACT200L_REG5 | ACT200L_RWIDL,
ACT200L_REG4 | ACT200L_OP0 | ACT200L_OP1 | ACT200L_BLKR,
ACT200L_REG0 | ACT200L_TXEN | ACT200L_RXEN
};
int ret = 0;
IRDA_DEBUG(2, "%s()\n", __func__ );
switch (state) {
case SIRDEV_STATE_DONGLE_RESET:
/* Reset the dongle : set RTS low for 25 ms */
sirdev_set_dtr_rts(dev, TRUE, FALSE);
state = ACT200L_STATE_WAIT1_RESET;
delay = 50;
break;
case ACT200L_STATE_WAIT1_RESET:
/* Clear DTR and set RTS to enter command mode */
sirdev_set_dtr_rts(dev, FALSE, TRUE);
udelay(25); /* better wait for some short while */
/* Write control bytes */
sirdev_raw_write(dev, control, sizeof(control));
state = ACT200L_STATE_WAIT2_RESET;
delay = 15;
break;
case ACT200L_STATE_WAIT2_RESET:
/* Go back to normal mode */
sirdev_set_dtr_rts(dev, TRUE, TRUE);
dev->speed = 9600;
break;
default:
IRDA_ERROR("%s(), unknown state %d\n", __func__, state);
ret = -1;
break;
}
dev->fsm.substate = state;
return (delay > 0) ? delay : ret;
}
MODULE_AUTHOR("SHIMIZU Takuya <tshimizu@ga2.so-net.ne.jp>");
MODULE_DESCRIPTION("ACTiSYS ACT-IR200L dongle driver");
MODULE_LICENSE("GPL");
MODULE_ALIAS("irda-dongle-10"); /* IRDA_ACT200L_DONGLE */
module_init(act200l_sir_init);
module_exit(act200l_sir_cleanup);
|
