1 /*********************************************************************
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>
12 * Copyright (c) 2001 SHIMIZU Takuya, All Rights Reserved.
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.
19 ********************************************************************/
21 #include <linux/module.h>
22 #include <linux/delay.h>
23 #include <linux/tty.h>
24 #include <linux/init.h>
26 #include <net/irda/irda.h>
27 #include <net/irda/irda_device.h>
29 static int act200l_reset(struct irda_task *task);
30 static void act200l_open(dongle_t *self, struct qos_info *qos);
31 static void act200l_close(dongle_t *self);
32 static int act200l_change_speed(struct irda_task *task);
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 */
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 */
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
50 /* Register 5: Receive Mode register */
51 #define ACT200L_REG5 0x50
52 #define ACT200L_RWIDL 0x01 /* fixed 1.6us pulse mode */
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 */
59 /* Register 7: Receive Sensitivity register #2 */
60 #define ACT200L_REG7 0x70
61 #define ACT200L_ENPOS 0x04 /* Ignore the falling edge */
63 /* Register 8,9: Baud Rate Dvider register #1,#2 */
64 #define ACT200L_REG8 0x80
65 #define ACT200L_REG9 0x90
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
74 /* Register 13: Control register #3 */
75 #define ACT200L_REG13 0xd0
76 #define ACT200L_SHDW 0x01 /* Enable access to shadow registers */
78 /* Register 15: Status register */
79 #define ACT200L_REG15 0xf0
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 */
86 static struct dongle_reg dongle = {
87 .type = IRDA_ACT200L_DONGLE,
89 .close = act200l_close,
90 .reset = act200l_reset,
91 .change_speed = act200l_change_speed,
95 static int __init act200l_init(void)
97 return irda_device_register_dongle(&dongle);
100 static void __exit act200l_cleanup(void)
102 irda_device_unregister_dongle(&dongle);
105 static void act200l_open(dongle_t *self, struct qos_info *qos)
107 IRDA_DEBUG(2, "%s()\n", __FUNCTION__ );
109 /* Power on the dongle */
110 self->set_dtr_rts(self->dev, TRUE, TRUE);
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;
117 static void act200l_close(dongle_t *self)
119 IRDA_DEBUG(2, "%s()\n", __FUNCTION__ );
121 /* Power off the dongle */
122 self->set_dtr_rts(self->dev, FALSE, FALSE);
126 * Function act200l_change_speed (dev, speed)
128 * Set the speed for the ACTiSYS ACT-IR200L type dongle.
131 static int act200l_change_speed(struct irda_task *task)
133 dongle_t *self = (dongle_t *) task->instance;
134 __u32 speed = (__u32) task->param;
138 IRDA_DEBUG(2, "%s()\n", __FUNCTION__ );
140 self->speed_task = task;
142 switch (task->state) {
144 if (irda_task_execute(self, act200l_reset, NULL, task,
147 /* Dongle need more time to reset */
148 irda_task_next_state(task, IRDA_TASK_CHILD_WAIT);
150 /* Give reset 1 sec to finish */
151 ret = msecs_to_jiffies(1000);
154 case IRDA_TASK_CHILD_WAIT:
155 IRDA_WARNING("%s(), resetting dongle timed out!\n",
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);
166 control[0] = ACT200L_REG8 | (ACT200L_9600 & 0x0f);
167 control[1] = ACT200L_REG9 | ((ACT200L_9600 >> 4) & 0x0f);
170 control[0] = ACT200L_REG8 | (ACT200L_19200 & 0x0f);
171 control[1] = ACT200L_REG9 | ((ACT200L_19200 >> 4) & 0x0f);
174 control[0] = ACT200L_REG8 | (ACT200L_38400 & 0x0f);
175 control[1] = ACT200L_REG9 | ((ACT200L_38400 >> 4) & 0x0f);
178 control[0] = ACT200L_REG8 | (ACT200L_57600 & 0x0f);
179 control[1] = ACT200L_REG9 | ((ACT200L_57600 >> 4) & 0x0f);
182 control[0] = ACT200L_REG8 | (ACT200L_115200 & 0x0f);
183 control[1] = ACT200L_REG9 | ((ACT200L_115200 >> 4) & 0x0f);
186 control[2] = ACT200L_REG1 | ACT200L_LODB | ACT200L_WIDE;
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);
194 /* Go back to normal mode */
195 self->set_dtr_rts(self->dev, TRUE, TRUE);
197 irda_task_next_state(task, IRDA_TASK_DONE);
198 self->speed_task = NULL;
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;
212 * Function act200l_reset (driver)
214 * Reset the ACTiSYS ACT-IR200L type dongle.
216 static int act200l_reset(struct irda_task *task)
218 dongle_t *self = (dongle_t *) task->instance;
221 ACT200L_REG13 | ACT200L_SHDW,
222 ACT200L_REG21 | ACT200L_EXCK | ACT200L_OSCL,
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
232 IRDA_DEBUG(2, "%s()\n", __FUNCTION__ );
234 self->reset_task = task;
236 switch (task->state) {
238 /* Power on the dongle */
239 self->set_dtr_rts(self->dev, TRUE, TRUE);
241 irda_task_next_state(task, IRDA_TASK_WAIT1);
242 ret = msecs_to_jiffies(50);
244 case IRDA_TASK_WAIT1:
245 /* Reset the dongle : set RTS low for 25 ms */
246 self->set_dtr_rts(self->dev, TRUE, FALSE);
248 irda_task_next_state(task, IRDA_TASK_WAIT2);
249 ret = msecs_to_jiffies(50);
251 case IRDA_TASK_WAIT2:
252 /* Clear DTR and set RTS to enter command mode */
253 self->set_dtr_rts(self->dev, FALSE, TRUE);
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);
260 case IRDA_TASK_WAIT3:
261 /* Go back to normal mode */
262 self->set_dtr_rts(self->dev, TRUE, TRUE);
264 irda_task_next_state(task, IRDA_TASK_DONE);
265 self->reset_task = NULL;
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;
278 MODULE_AUTHOR("SHIMIZU Takuya <tshimizu@ga2.so-net.ne.jp>");
279 MODULE_DESCRIPTION("ACTiSYS ACT-IR200L dongle driver");
280 MODULE_LICENSE("GPL");
281 MODULE_ALIAS("irda-dongle-10"); /* IRDA_ACT200L_DONGLE */
284 * Function init_module (void)
286 * Initialize ACTiSYS ACT-IR200L module
289 module_init(act200l_init);
292 * Function cleanup_module (void)
294 * Cleanup ACTiSYS ACT-IR200L module
297 module_exit(act200l_cleanup);