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path: root/drivers/net/irda/act200l.c
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Diffstat (limited to 'drivers/net/irda/act200l.c')
-rw-r--r--drivers/net/irda/act200l.c297
1 files changed, 297 insertions, 0 deletions
diff --git a/drivers/net/irda/act200l.c b/drivers/net/irda/act200l.c
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index 000000000000..756cd44e857a
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+++ b/drivers/net/irda/act200l.c
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1/*********************************************************************
2 *
3 * Filename: act200l.c
4 * Version: 0.8
5 * Description: Implementation for the ACTiSYS ACT-IR200L dongle
6 * Status: Experimental.
7 * Author: SHIMIZU Takuya <tshimizu@ga2.so-net.ne.jp>
8 * Created at: Fri Aug 3 17:35:42 2001
9 * Modified at: Fri Aug 17 10:22:40 2001
10 * Modified by: SHIMIZU Takuya <tshimizu@ga2.so-net.ne.jp>
11 *
12 * Copyright (c) 2001 SHIMIZU Takuya, All Rights Reserved.
13 *
14 * This program is free software; you can redistribute it and/or
15 * modify it under the terms of the GNU General Public License as
16 * published by the Free Software Foundation; either version 2 of
17 * the License, or (at your option) any later version.
18 *
19 ********************************************************************/
20
21#include <linux/module.h>
22#include <linux/delay.h>
23#include <linux/tty.h>
24#include <linux/init.h>
25
26#include <net/irda/irda.h>
27#include <net/irda/irda_device.h>
28
29static int act200l_reset(struct irda_task *task);
30static void act200l_open(dongle_t *self, struct qos_info *qos);
31static void act200l_close(dongle_t *self);
32static int act200l_change_speed(struct irda_task *task);
33
34/* Regsiter 0: Control register #1 */
35#define ACT200L_REG0 0x00
36#define ACT200L_TXEN 0x01 /* Enable transmitter */
37#define ACT200L_RXEN 0x02 /* Enable receiver */
38
39/* Register 1: Control register #2 */
40#define ACT200L_REG1 0x10
41#define ACT200L_LODB 0x01 /* Load new baud rate count value */
42#define ACT200L_WIDE 0x04 /* Expand the maximum allowable pulse */
43
44/* Register 4: Output Power register */
45#define ACT200L_REG4 0x40
46#define ACT200L_OP0 0x01 /* Enable LED1C output */
47#define ACT200L_OP1 0x02 /* Enable LED2C output */
48#define ACT200L_BLKR 0x04
49
50/* Register 5: Receive Mode register */
51#define ACT200L_REG5 0x50
52#define ACT200L_RWIDL 0x01 /* fixed 1.6us pulse mode */
53
54/* Register 6: Receive Sensitivity register #1 */
55#define ACT200L_REG6 0x60
56#define ACT200L_RS0 0x01 /* receive threshold bit 0 */
57#define ACT200L_RS1 0x02 /* receive threshold bit 1 */
58
59/* Register 7: Receive Sensitivity register #2 */
60#define ACT200L_REG7 0x70
61#define ACT200L_ENPOS 0x04 /* Ignore the falling edge */
62
63/* Register 8,9: Baud Rate Dvider register #1,#2 */
64#define ACT200L_REG8 0x80
65#define ACT200L_REG9 0x90
66
67#define ACT200L_2400 0x5f
68#define ACT200L_9600 0x17
69#define ACT200L_19200 0x0b
70#define ACT200L_38400 0x05
71#define ACT200L_57600 0x03
72#define ACT200L_115200 0x01
73
74/* Register 13: Control register #3 */
75#define ACT200L_REG13 0xd0
76#define ACT200L_SHDW 0x01 /* Enable access to shadow registers */
77
78/* Register 15: Status register */
79#define ACT200L_REG15 0xf0
80
81/* Register 21: Control register #4 */
82#define ACT200L_REG21 0x50
83#define ACT200L_EXCK 0x02 /* Disable clock output driver */
84#define ACT200L_OSCL 0x04 /* oscillator in low power, medium accuracy mode */
85
86static struct dongle_reg dongle = {
87 .type = IRDA_ACT200L_DONGLE,
88 .open = act200l_open,
89 .close = act200l_close,
90 .reset = act200l_reset,
91 .change_speed = act200l_change_speed,
92 .owner = THIS_MODULE,
93};
94
95static int __init act200l_init(void)
96{
97 return irda_device_register_dongle(&dongle);
98}
99
100static void __exit act200l_cleanup(void)
101{
102 irda_device_unregister_dongle(&dongle);
103}
104
105static void act200l_open(dongle_t *self, struct qos_info *qos)
106{
107 IRDA_DEBUG(2, "%s()\n", __FUNCTION__ );
108
109 /* Power on the dongle */
110 self->set_dtr_rts(self->dev, TRUE, TRUE);
111
112 /* Set the speeds we can accept */
113 qos->baud_rate.bits &= IR_9600|IR_19200|IR_38400|IR_57600|IR_115200;
114 qos->min_turn_time.bits = 0x03;
115}
116
117static void act200l_close(dongle_t *self)
118{
119 IRDA_DEBUG(2, "%s()\n", __FUNCTION__ );
120
121 /* Power off the dongle */
122 self->set_dtr_rts(self->dev, FALSE, FALSE);
123}
124
125/*
126 * Function act200l_change_speed (dev, speed)
127 *
128 * Set the speed for the ACTiSYS ACT-IR200L type dongle.
129 *
130 */
131static int act200l_change_speed(struct irda_task *task)
132{
133 dongle_t *self = (dongle_t *) task->instance;
134 __u32 speed = (__u32) task->param;
135 __u8 control[3];
136 int ret = 0;
137
138 IRDA_DEBUG(2, "%s()\n", __FUNCTION__ );
139
140 self->speed_task = task;
141
142 switch (task->state) {
143 case IRDA_TASK_INIT:
144 if (irda_task_execute(self, act200l_reset, NULL, task,
145 (void *) speed))
146 {
147 /* Dongle need more time to reset */
148 irda_task_next_state(task, IRDA_TASK_CHILD_WAIT);
149
150 /* Give reset 1 sec to finish */
151 ret = msecs_to_jiffies(1000);
152 }
153 break;
154 case IRDA_TASK_CHILD_WAIT:
155 IRDA_WARNING("%s(), resetting dongle timed out!\n",
156 __FUNCTION__);
157 ret = -1;
158 break;
159 case IRDA_TASK_CHILD_DONE:
160 /* Clear DTR and set RTS to enter command mode */
161 self->set_dtr_rts(self->dev, FALSE, TRUE);
162
163 switch (speed) {
164 case 9600:
165 default:
166 control[0] = ACT200L_REG8 | (ACT200L_9600 & 0x0f);
167 control[1] = ACT200L_REG9 | ((ACT200L_9600 >> 4) & 0x0f);
168 break;
169 case 19200:
170 control[0] = ACT200L_REG8 | (ACT200L_19200 & 0x0f);
171 control[1] = ACT200L_REG9 | ((ACT200L_19200 >> 4) & 0x0f);
172 break;
173 case 38400:
174 control[0] = ACT200L_REG8 | (ACT200L_38400 & 0x0f);
175 control[1] = ACT200L_REG9 | ((ACT200L_38400 >> 4) & 0x0f);
176 break;
177 case 57600:
178 control[0] = ACT200L_REG8 | (ACT200L_57600 & 0x0f);
179 control[1] = ACT200L_REG9 | ((ACT200L_57600 >> 4) & 0x0f);
180 break;
181 case 115200:
182 control[0] = ACT200L_REG8 | (ACT200L_115200 & 0x0f);
183 control[1] = ACT200L_REG9 | ((ACT200L_115200 >> 4) & 0x0f);
184 break;
185 }
186 control[2] = ACT200L_REG1 | ACT200L_LODB | ACT200L_WIDE;
187
188 /* Write control bytes */
189 self->write(self->dev, control, 3);
190 irda_task_next_state(task, IRDA_TASK_WAIT);
191 ret = msecs_to_jiffies(5);
192 break;
193 case IRDA_TASK_WAIT:
194 /* Go back to normal mode */
195 self->set_dtr_rts(self->dev, TRUE, TRUE);
196
197 irda_task_next_state(task, IRDA_TASK_DONE);
198 self->speed_task = NULL;
199 break;
200 default:
201 IRDA_ERROR("%s(), unknown state %d\n",
202 __FUNCTION__, task->state);
203 irda_task_next_state(task, IRDA_TASK_DONE);
204 self->speed_task = NULL;
205 ret = -1;
206 break;
207 }
208 return ret;
209}
210
211/*
212 * Function act200l_reset (driver)
213 *
214 * Reset the ACTiSYS ACT-IR200L type dongle.
215 */
216static int act200l_reset(struct irda_task *task)
217{
218 dongle_t *self = (dongle_t *) task->instance;
219 __u8 control[9] = {
220 ACT200L_REG15,
221 ACT200L_REG13 | ACT200L_SHDW,
222 ACT200L_REG21 | ACT200L_EXCK | ACT200L_OSCL,
223 ACT200L_REG13,
224 ACT200L_REG7 | ACT200L_ENPOS,
225 ACT200L_REG6 | ACT200L_RS0 | ACT200L_RS1,
226 ACT200L_REG5 | ACT200L_RWIDL,
227 ACT200L_REG4 | ACT200L_OP0 | ACT200L_OP1 | ACT200L_BLKR,
228 ACT200L_REG0 | ACT200L_TXEN | ACT200L_RXEN
229 };
230 int ret = 0;
231
232 IRDA_DEBUG(2, "%s()\n", __FUNCTION__ );
233
234 self->reset_task = task;
235
236 switch (task->state) {
237 case IRDA_TASK_INIT:
238 /* Power on the dongle */
239 self->set_dtr_rts(self->dev, TRUE, TRUE);
240
241 irda_task_next_state(task, IRDA_TASK_WAIT1);
242 ret = msecs_to_jiffies(50);
243 break;
244 case IRDA_TASK_WAIT1:
245 /* Reset the dongle : set RTS low for 25 ms */
246 self->set_dtr_rts(self->dev, TRUE, FALSE);
247
248 irda_task_next_state(task, IRDA_TASK_WAIT2);
249 ret = msecs_to_jiffies(50);
250 break;
251 case IRDA_TASK_WAIT2:
252 /* Clear DTR and set RTS to enter command mode */
253 self->set_dtr_rts(self->dev, FALSE, TRUE);
254
255 /* Write control bytes */
256 self->write(self->dev, control, 9);
257 irda_task_next_state(task, IRDA_TASK_WAIT3);
258 ret = msecs_to_jiffies(15);
259 break;
260 case IRDA_TASK_WAIT3:
261 /* Go back to normal mode */
262 self->set_dtr_rts(self->dev, TRUE, TRUE);
263
264 irda_task_next_state(task, IRDA_TASK_DONE);
265 self->reset_task = NULL;
266 break;
267 default:
268 IRDA_ERROR("%s(), unknown state %d\n",
269 __FUNCTION__, task->state);
270 irda_task_next_state(task, IRDA_TASK_DONE);
271 self->reset_task = NULL;
272 ret = -1;
273 break;
274 }
275 return ret;
276}
277
278MODULE_AUTHOR("SHIMIZU Takuya <tshimizu@ga2.so-net.ne.jp>");
279MODULE_DESCRIPTION("ACTiSYS ACT-IR200L dongle driver");
280MODULE_LICENSE("GPL");
281MODULE_ALIAS("irda-dongle-10"); /* IRDA_ACT200L_DONGLE */
282
283/*
284 * Function init_module (void)
285 *
286 * Initialize ACTiSYS ACT-IR200L module
287 *
288 */
289module_init(act200l_init);
290
291/*
292 * Function cleanup_module (void)
293 *
294 * Cleanup ACTiSYS ACT-IR200L module
295 *
296 */
297module_exit(act200l_cleanup);
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-22 07:15:26 -0500