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1/*********************************************************************
2 *
3 * Filename: ma600.c
4 * Version: 0.1
5 * Description: Implementation of the MA600 dongle
6 * Status: Experimental.
7 * Author: Leung <95Etwl@alumni.ee.ust.hk> http://www.engsvr.ust/~eetwl95
8 * Created at: Sat Jun 10 20:02:35 2000
9 * Modified at: Sat Aug 16 09:34:13 2003
10 * Modified by: Martin Diehl <mad@mdiehl.de> (modified for new sir_dev)
11 *
12 * Note: very thanks to Mr. Maru Wang <maru@mobileaction.com.tw> for providing
13 * information on the MA600 dongle
14 *
15 * Copyright (c) 2000 Leung, All Rights Reserved.
16 *
17 * This program is free software; you can redistribute it and/or
18 * modify it under the terms of the GNU General Public License as
19 * published by the Free Software Foundation; either version 2 of
20 * the License, or (at your option) any later version.
21 *
22 * This program is distributed in the hope that it will be useful,
23 * but WITHOUT ANY WARRANTY; without even the implied warranty of
24 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
25 * GNU General Public License for more details.
26 *
27 * You should have received a copy of the GNU General Public License
28 * along with this program; if not, write to the Free Software
29 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
30 * MA 02111-1307 USA
31 *
32 ********************************************************************/
33
34#include <linux/module.h>
35#include <linux/delay.h>
36#include <linux/init.h>
37
38#include <net/irda/irda.h>
39
40#include "sir-dev.h"
41
42static int ma600_open(struct sir_dev *);
43static int ma600_close(struct sir_dev *);
44static int ma600_change_speed(struct sir_dev *, unsigned);
45static int ma600_reset(struct sir_dev *);
46
47/* control byte for MA600 */
48#define MA600_9600 0x00
49#define MA600_19200 0x01
50#define MA600_38400 0x02
51#define MA600_57600 0x03
52#define MA600_115200 0x04
53#define MA600_DEV_ID1 0x05
54#define MA600_DEV_ID2 0x06
55#define MA600_2400 0x08
56
57static struct dongle_driver ma600 = {
58 .owner = THIS_MODULE,
59 .driver_name = "MA600",
60 .type = IRDA_MA600_DONGLE,
61 .open = ma600_open,
62 .close = ma600_close,
63 .reset = ma600_reset,
64 .set_speed = ma600_change_speed,
65};
66
67
68static int __init ma600_sir_init(void)
69{
70 IRDA_DEBUG(2, "%s()\n", __func__);
71 return irda_register_dongle(&ma600);
72}
73
74static void __exit ma600_sir_cleanup(void)
75{
76 IRDA_DEBUG(2, "%s()\n", __func__);
77 irda_unregister_dongle(&ma600);
78}
79
80/*
81 Power on:
82 (0) Clear RTS and DTR for 1 second
83 (1) Set RTS and DTR for 1 second
84 (2) 9600 bps now
85 Note: assume RTS, DTR are clear before
86*/
87static int ma600_open(struct sir_dev *dev)
88{
89 struct qos_info *qos = &dev->qos;
90
91 IRDA_DEBUG(2, "%s()\n", __func__);
92
93 sirdev_set_dtr_rts(dev, TRUE, TRUE);
94
95 /* Explicitly set the speeds we can accept */
96 qos->baud_rate.bits &= IR_2400|IR_9600|IR_19200|IR_38400
97 |IR_57600|IR_115200;
98 /* Hm, 0x01 means 10ms - for >= 1ms we would need 0x07 */
99 qos->min_turn_time.bits = 0x01; /* Needs at least 1 ms */
100 irda_qos_bits_to_value(qos);
101
102 /* irda thread waits 50 msec for power settling */
103
104 return 0;
105}
106
107static int ma600_close(struct sir_dev *dev)
108{
109 IRDA_DEBUG(2, "%s()\n", __func__);
110
111 /* Power off dongle */
112 sirdev_set_dtr_rts(dev, FALSE, FALSE);
113
114 return 0;
115}
116
117static __u8 get_control_byte(__u32 speed)
118{
119 __u8 byte;
120
121 switch (speed) {
122 default:
123 case 115200:
124 byte = MA600_115200;
125 break;
126 case 57600:
127 byte = MA600_57600;
128 break;
129 case 38400:
130 byte = MA600_38400;
131 break;
132 case 19200:
133 byte = MA600_19200;
134 break;
135 case 9600:
136 byte = MA600_9600;
137 break;
138 case 2400:
139 byte = MA600_2400;
140 break;
141 }
142
143 return byte;
144}
145
146/*
147 * Function ma600_change_speed (dev, speed)
148 *
149 * Set the speed for the MA600 type dongle.
150 *
151 * The dongle has already been reset to a known state (dongle default)
152 * We cycle through speeds by pulsing RTS low and then high.
153 */
154
155/*
156 * Function ma600_change_speed (dev, speed)
157 *
158 * Set the speed for the MA600 type dongle.
159 *
160 * Algorithm
161 * 1. Reset (already done by irda thread state machine)
162 * 2. clear RTS, set DTR and wait for 1ms
163 * 3. send Control Byte to the MA600 through TXD to set new baud rate
164 * wait until the stop bit of Control Byte is sent (for 9600 baud rate,
165 * it takes about 10 msec)
166 * 4. set RTS, set DTR (return to NORMAL Operation)
167 * 5. wait at least 10 ms, new setting (baud rate, etc) takes effect here
168 * after
169 */
170
171/* total delays are only about 20ms - let's just sleep for now to
172 * avoid the state machine complexity before we get things working
173 */
174
175static int ma600_change_speed(struct sir_dev *dev, unsigned speed)
176{
177 u8 byte;
178
179 IRDA_DEBUG(2, "%s(), speed=%d (was %d)\n", __func__,
180 speed, dev->speed);
181
182 /* dongle already reset, dongle and port at default speed (9600) */
183
184 /* Set RTS low for 1 ms */
185 sirdev_set_dtr_rts(dev, TRUE, FALSE);
186 mdelay(1);
187
188 /* Write control byte */
189 byte = get_control_byte(speed);
190 sirdev_raw_write(dev, &byte, sizeof(byte));
191
192 /* Wait at least 10ms: fake wait_until_sent - 10 bits at 9600 baud*/
193 msleep(15); /* old ma600 uses 15ms */
194
195#if 1
196 /* read-back of the control byte. ma600 is the first dongle driver
197 * which uses this so there might be some unidentified issues.
198 * Disable this in case of problems with readback.
199 */
200
201 sirdev_raw_read(dev, &byte, sizeof(byte));
202 if (byte != get_control_byte(speed)) {
203 IRDA_WARNING("%s(): bad control byte read-back %02x != %02x\n",
204 __func__, (unsigned) byte,
205 (unsigned) get_control_byte(speed));
206 return -1;
207 }
208 else
209 IRDA_DEBUG(2, "%s() control byte write read OK\n", __func__);
210#endif
211
212 /* Set DTR, Set RTS */
213 sirdev_set_dtr_rts(dev, TRUE, TRUE);
214
215 /* Wait at least 10ms */
216 msleep(10);
217
218 /* dongle is now switched to the new speed */
219 dev->speed = speed;
220
221 return 0;
222}
223
224/*
225 * Function ma600_reset (dev)
226 *
227 * This function resets the ma600 dongle.
228 *
229 * Algorithm:
230 * 0. DTR=0, RTS=1 and wait 10 ms
231 * 1. DTR=1, RTS=1 and wait 10 ms
232 * 2. 9600 bps now
233 */
234
235/* total delays are only about 20ms - let's just sleep for now to
236 * avoid the state machine complexity before we get things working
237 */
238
239static int ma600_reset(struct sir_dev *dev)
240{
241 IRDA_DEBUG(2, "%s()\n", __func__);
242
243 /* Reset the dongle : set DTR low for 10 ms */
244 sirdev_set_dtr_rts(dev, FALSE, TRUE);
245 msleep(10);
246
247 /* Go back to normal mode */
248 sirdev_set_dtr_rts(dev, TRUE, TRUE);
249 msleep(10);
250
251 dev->speed = 9600; /* That's the dongle-default */
252
253 return 0;
254}
255
256MODULE_AUTHOR("Leung <95Etwl@alumni.ee.ust.hk> http://www.engsvr.ust/~eetwl95");
257MODULE_DESCRIPTION("MA600 dongle driver version 0.1");
258MODULE_LICENSE("GPL");
259MODULE_ALIAS("irda-dongle-11"); /* IRDA_MA600_DONGLE */
260
261module_init(ma600_sir_init);
262module_exit(ma600_sir_cleanup);
263
1/*********************************************************************
2 *
3 * Filename: ma600.c
4 * Version: 0.1
5 * Description: Implementation of the MA600 dongle
6 * Status: Experimental.
7 * Author: Leung <95Etwl@alumni.ee.ust.hk> http://www.engsvr.ust/~eetwl95
8 * Created at: Sat Jun 10 20:02:35 2000
9 * Modified at: Sat Aug 16 09:34:13 2003
10 * Modified by: Martin Diehl <mad@mdiehl.de> (modified for new sir_dev)
11 *
12 * Note: very thanks to Mr. Maru Wang <maru@mobileaction.com.tw> for providing
13 * information on the MA600 dongle
14 *
15 * Copyright (c) 2000 Leung, All Rights Reserved.
16 *
17 * This program is free software; you can redistribute it and/or
18 * modify it under the terms of the GNU General Public License as
19 * published by the Free Software Foundation; either version 2 of
20 * the License, or (at your option) any later version.
21 *
22 * This program is distributed in the hope that it will be useful,
23 * but WITHOUT ANY WARRANTY; without even the implied warranty of
24 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
25 * GNU General Public License for more details.
26 *
27 * You should have received a copy of the GNU General Public License
28 * along with this program; if not, see <http://www.gnu.org/licenses/>.
29 *
30 ********************************************************************/
31
32#include <linux/module.h>
33#include <linux/delay.h>
34#include <linux/init.h>
35
36#include <net/irda/irda.h>
37
38#include "sir-dev.h"
39
40static int ma600_open(struct sir_dev *);
41static int ma600_close(struct sir_dev *);
42static int ma600_change_speed(struct sir_dev *, unsigned);
43static int ma600_reset(struct sir_dev *);
44
45/* control byte for MA600 */
46#define MA600_9600 0x00
47#define MA600_19200 0x01
48#define MA600_38400 0x02
49#define MA600_57600 0x03
50#define MA600_115200 0x04
51#define MA600_DEV_ID1 0x05
52#define MA600_DEV_ID2 0x06
53#define MA600_2400 0x08
54
55static struct dongle_driver ma600 = {
56 .owner = THIS_MODULE,
57 .driver_name = "MA600",
58 .type = IRDA_MA600_DONGLE,
59 .open = ma600_open,
60 .close = ma600_close,
61 .reset = ma600_reset,
62 .set_speed = ma600_change_speed,
63};
64
65
66static int __init ma600_sir_init(void)
67{
68 return irda_register_dongle(&ma600);
69}
70
71static void __exit ma600_sir_cleanup(void)
72{
73 irda_unregister_dongle(&ma600);
74}
75
76/*
77 Power on:
78 (0) Clear RTS and DTR for 1 second
79 (1) Set RTS and DTR for 1 second
80 (2) 9600 bps now
81 Note: assume RTS, DTR are clear before
82*/
83static int ma600_open(struct sir_dev *dev)
84{
85 struct qos_info *qos = &dev->qos;
86
87 sirdev_set_dtr_rts(dev, TRUE, TRUE);
88
89 /* Explicitly set the speeds we can accept */
90 qos->baud_rate.bits &= IR_2400|IR_9600|IR_19200|IR_38400
91 |IR_57600|IR_115200;
92 /* Hm, 0x01 means 10ms - for >= 1ms we would need 0x07 */
93 qos->min_turn_time.bits = 0x01; /* Needs at least 1 ms */
94 irda_qos_bits_to_value(qos);
95
96 /* irda thread waits 50 msec for power settling */
97
98 return 0;
99}
100
101static int ma600_close(struct sir_dev *dev)
102{
103 /* Power off dongle */
104 sirdev_set_dtr_rts(dev, FALSE, FALSE);
105
106 return 0;
107}
108
109static __u8 get_control_byte(__u32 speed)
110{
111 __u8 byte;
112
113 switch (speed) {
114 default:
115 case 115200:
116 byte = MA600_115200;
117 break;
118 case 57600:
119 byte = MA600_57600;
120 break;
121 case 38400:
122 byte = MA600_38400;
123 break;
124 case 19200:
125 byte = MA600_19200;
126 break;
127 case 9600:
128 byte = MA600_9600;
129 break;
130 case 2400:
131 byte = MA600_2400;
132 break;
133 }
134
135 return byte;
136}
137
138/*
139 * Function ma600_change_speed (dev, speed)
140 *
141 * Set the speed for the MA600 type dongle.
142 *
143 * The dongle has already been reset to a known state (dongle default)
144 * We cycle through speeds by pulsing RTS low and then high.
145 */
146
147/*
148 * Function ma600_change_speed (dev, speed)
149 *
150 * Set the speed for the MA600 type dongle.
151 *
152 * Algorithm
153 * 1. Reset (already done by irda thread state machine)
154 * 2. clear RTS, set DTR and wait for 1ms
155 * 3. send Control Byte to the MA600 through TXD to set new baud rate
156 * wait until the stop bit of Control Byte is sent (for 9600 baud rate,
157 * it takes about 10 msec)
158 * 4. set RTS, set DTR (return to NORMAL Operation)
159 * 5. wait at least 10 ms, new setting (baud rate, etc) takes effect here
160 * after
161 */
162
163/* total delays are only about 20ms - let's just sleep for now to
164 * avoid the state machine complexity before we get things working
165 */
166
167static int ma600_change_speed(struct sir_dev *dev, unsigned speed)
168{
169 u8 byte;
170
171 pr_debug("%s(), speed=%d (was %d)\n", __func__,
172 speed, dev->speed);
173
174 /* dongle already reset, dongle and port at default speed (9600) */
175
176 /* Set RTS low for 1 ms */
177 sirdev_set_dtr_rts(dev, TRUE, FALSE);
178 mdelay(1);
179
180 /* Write control byte */
181 byte = get_control_byte(speed);
182 sirdev_raw_write(dev, &byte, sizeof(byte));
183
184 /* Wait at least 10ms: fake wait_until_sent - 10 bits at 9600 baud*/
185 msleep(15); /* old ma600 uses 15ms */
186
187#if 1
188 /* read-back of the control byte. ma600 is the first dongle driver
189 * which uses this so there might be some unidentified issues.
190 * Disable this in case of problems with readback.
191 */
192
193 sirdev_raw_read(dev, &byte, sizeof(byte));
194 if (byte != get_control_byte(speed)) {
195 net_warn_ratelimited("%s(): bad control byte read-back %02x != %02x\n",
196 __func__, (unsigned)byte,
197 (unsigned)get_control_byte(speed));
198 return -1;
199 }
200 else
201 pr_debug("%s() control byte write read OK\n", __func__);
202#endif
203
204 /* Set DTR, Set RTS */
205 sirdev_set_dtr_rts(dev, TRUE, TRUE);
206
207 /* Wait at least 10ms */
208 msleep(10);
209
210 /* dongle is now switched to the new speed */
211 dev->speed = speed;
212
213 return 0;
214}
215
216/*
217 * Function ma600_reset (dev)
218 *
219 * This function resets the ma600 dongle.
220 *
221 * Algorithm:
222 * 0. DTR=0, RTS=1 and wait 10 ms
223 * 1. DTR=1, RTS=1 and wait 10 ms
224 * 2. 9600 bps now
225 */
226
227/* total delays are only about 20ms - let's just sleep for now to
228 * avoid the state machine complexity before we get things working
229 */
230
231static int ma600_reset(struct sir_dev *dev)
232{
233 /* Reset the dongle : set DTR low for 10 ms */
234 sirdev_set_dtr_rts(dev, FALSE, TRUE);
235 msleep(10);
236
237 /* Go back to normal mode */
238 sirdev_set_dtr_rts(dev, TRUE, TRUE);
239 msleep(10);
240
241 dev->speed = 9600; /* That's the dongle-default */
242
243 return 0;
244}
245
246MODULE_AUTHOR("Leung <95Etwl@alumni.ee.ust.hk> http://www.engsvr.ust/~eetwl95");
247MODULE_DESCRIPTION("MA600 dongle driver version 0.1");
248MODULE_LICENSE("GPL");
249MODULE_ALIAS("irda-dongle-11"); /* IRDA_MA600_DONGLE */
250
251module_init(ma600_sir_init);
252module_exit(ma600_sir_cleanup);
253