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[PATCH] W1: possible cleanups
[linux-2.6/verdex.git] / drivers / media / video / adv7170.c
blob48709582a18612400040d91a53e4368cb0cf2081
1 /*
2 * adv7170 - adv7170, adv7171 video encoder driver version 0.0.1
3 *
4 * Copyright (C) 2002 Maxim Yevtyushkin <max@linuxmedialabs.com>
5 *
6 * Based on adv7176 driver by:
7 *
8 * Copyright (C) 1998 Dave Perks <dperks@ibm.net>
9 * Copyright (C) 1999 Wolfgang Scherr <scherr@net4you.net>
10 * Copyright (C) 2000 Serguei Miridonov <mirsev@cicese.mx>
11 * - some corrections for Pinnacle Systems Inc. DC10plus card.
12 *
13 * Changes by Ronald Bultje <rbultje@ronald.bitfreak.net>
14 * - moved over to linux>=2.4.x i2c protocol (1/1/2003)
15 *
16 * This program is free software; you can redistribute it and/or modify
17 * it under the terms of the GNU General Public License as published by
18 * the Free Software Foundation; either version 2 of the License, or
19 * (at your option) any later version.
20 *
21 * This program is distributed in the hope that it will be useful,
22 * but WITHOUT ANY WARRANTY; without even the implied warranty of
23 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
24 * GNU General Public License for more details.
25 *
26 * You should have received a copy of the GNU General Public License
27 * along with this program; if not, write to the Free Software
28 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
29 */
30
31 #include <linux/module.h>
32 #include <linux/init.h>
33 #include <linux/delay.h>
34 #include <linux/errno.h>
35 #include <linux/fs.h>
36 #include <linux/kernel.h>
37 #include <linux/major.h>
38 #include <linux/slab.h>
39 #include <linux/mm.h>
40 #include <linux/pci.h>
41 #include <linux/signal.h>
42 #include <asm/io.h>
43 #include <asm/pgtable.h>
44 #include <asm/page.h>
45 #include <linux/sched.h>
46 #include <linux/types.h>
47
48 #include <linux/videodev.h>
49 #include <asm/uaccess.h>
50
51 MODULE_DESCRIPTION("Analog Devices ADV7170 video encoder driver");
52 MODULE_AUTHOR("Maxim Yevtyushkin");
53 MODULE_LICENSE("GPL");
54
55 #include <linux/i2c.h>
56
57 #define I2C_NAME(x) (x)->name
58
59 #include <linux/video_encoder.h>
60
61 static int debug = 0;
62 module_param(debug, int, 0);
63 MODULE_PARM_DESC(debug, "Debug level (0-1)");
64
65 #define dprintk(num, format, args...) \
66 do { \
67 if (debug >= num) \
68 printk(format, ##args); \
69 } while (0)
70
71 /* ----------------------------------------------------------------------- */
72
73 struct adv7170 {
74 unsigned char reg[128];
75
76 int norm;
77 int input;
78 int enable;
79 int bright;
80 int contrast;
81 int hue;
82 int sat;
83 };
84
85 #define I2C_ADV7170 0xd4
86 #define I2C_ADV7171 0x54
87
88 static char adv7170_name[] = "adv7170";
89 static char adv7171_name[] = "adv7171";
90
91 static char *inputs[] = { "pass_through", "play_back" };
92 static char *norms[] = { "PAL", "NTSC" };
93
94 /* ----------------------------------------------------------------------- */
95
96 static inline int
97 adv7170_write (struct i2c_client *client,
98 u8 reg,
99 u8 value)
100 {
101 struct adv7170 *encoder = i2c_get_clientdata(client);
102
103 encoder->reg[reg] = value;
104 return i2c_smbus_write_byte_data(client, reg, value);
105 }
106
107 static inline int
108 adv7170_read (struct i2c_client *client,
109 u8 reg)
110 {
111 return i2c_smbus_read_byte_data(client, reg);
112 }
113
114 static int
115 adv7170_write_block (struct i2c_client *client,
116 const u8 *data,
117 unsigned int len)
118 {
119 int ret = -1;
120 u8 reg;
121
122 /* the adv7170 has an autoincrement function, use it if
123 * the adapter understands raw I2C */
124 if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
125 /* do raw I2C, not smbus compatible */
126 struct adv7170 *encoder = i2c_get_clientdata(client);
127 u8 block_data[32];
128 int block_len;
129
130 while (len >= 2) {
131 block_len = 0;
132 block_data[block_len++] = reg = data[0];
133 do {
134 block_data[block_len++] =
135 encoder->reg[reg++] = data[1];
136 len -= 2;
137 data += 2;
138 } while (len >= 2 && data[0] == reg &&
139 block_len < 32);
140 if ((ret = i2c_master_send(client, block_data,
141 block_len)) < 0)
142 break;
143 }
144 } else {
145 /* do some slow I2C emulation kind of thing */
146 while (len >= 2) {
147 reg = *data++;
148 if ((ret = adv7170_write(client, reg,
149 *data++)) < 0)
150 break;
151 len -= 2;
152 }
153 }
154
155 return ret;
156 }
157
158 /* ----------------------------------------------------------------------- */
159 // Output filter: S-Video Composite
160
161 #define MR050 0x11 //0x09
162 #define MR060 0x14 //0x0c
163
164 //---------------------------------------------------------------------------
165
166 #define TR0MODE 0x4c
167 #define TR0RST 0x80
168
169 #define TR1CAPT 0x00
170 #define TR1PLAY 0x00
171
172
173 static const unsigned char init_NTSC[] = {
174 0x00, 0x10, // MR0
175 0x01, 0x20, // MR1
176 0x02, 0x0e, // MR2 RTC control: bits 2 and 1
177 0x03, 0x80, // MR3
178 0x04, 0x30, // MR4
179 0x05, 0x00, // Reserved
180 0x06, 0x00, // Reserved
181 0x07, TR0MODE, // TM0
182 0x08, TR1CAPT, // TM1
183 0x09, 0x16, // Fsc0
184 0x0a, 0x7c, // Fsc1
185 0x0b, 0xf0, // Fsc2
186 0x0c, 0x21, // Fsc3
187 0x0d, 0x00, // Subcarrier Phase
188 0x0e, 0x00, // Closed Capt. Ext 0
189 0x0f, 0x00, // Closed Capt. Ext 1
190 0x10, 0x00, // Closed Capt. 0
191 0x11, 0x00, // Closed Capt. 1
192 0x12, 0x00, // Pedestal Ctl 0
193 0x13, 0x00, // Pedestal Ctl 1
194 0x14, 0x00, // Pedestal Ctl 2
195 0x15, 0x00, // Pedestal Ctl 3
196 0x16, 0x00, // CGMS_WSS_0
197 0x17, 0x00, // CGMS_WSS_1
198 0x18, 0x00, // CGMS_WSS_2
199 0x19, 0x00, // Teletext Ctl
200 };
201
202 static const unsigned char init_PAL[] = {
203 0x00, 0x71, // MR0
204 0x01, 0x20, // MR1
205 0x02, 0x0e, // MR2 RTC control: bits 2 and 1
206 0x03, 0x80, // MR3
207 0x04, 0x30, // MR4
208 0x05, 0x00, // Reserved
209 0x06, 0x00, // Reserved
210 0x07, TR0MODE, // TM0
211 0x08, TR1CAPT, // TM1
212 0x09, 0xcb, // Fsc0
213 0x0a, 0x8a, // Fsc1
214 0x0b, 0x09, // Fsc2
215 0x0c, 0x2a, // Fsc3
216 0x0d, 0x00, // Subcarrier Phase
217 0x0e, 0x00, // Closed Capt. Ext 0
218 0x0f, 0x00, // Closed Capt. Ext 1
219 0x10, 0x00, // Closed Capt. 0
220 0x11, 0x00, // Closed Capt. 1
221 0x12, 0x00, // Pedestal Ctl 0
222 0x13, 0x00, // Pedestal Ctl 1
223 0x14, 0x00, // Pedestal Ctl 2
224 0x15, 0x00, // Pedestal Ctl 3
225 0x16, 0x00, // CGMS_WSS_0
226 0x17, 0x00, // CGMS_WSS_1
227 0x18, 0x00, // CGMS_WSS_2
228 0x19, 0x00, // Teletext Ctl
229 };
230
231
232 static int
233 adv7170_command (struct i2c_client *client,
234 unsigned int cmd,
235 void * arg)
236 {
237 struct adv7170 *encoder = i2c_get_clientdata(client);
238
239 switch (cmd) {
240
241 case 0:
242 #if 0
243 /* This is just for testing!!! */
244 adv7170_write_block(client, init_common,
245 sizeof(init_common));
246 adv7170_write(client, 0x07, TR0MODE | TR0RST);
247 adv7170_write(client, 0x07, TR0MODE);
248 #endif
249 break;
250
251 case ENCODER_GET_CAPABILITIES:
252 {
253 struct video_encoder_capability *cap = arg;
254
255 cap->flags = VIDEO_ENCODER_PAL |
256 VIDEO_ENCODER_NTSC;
257 cap->inputs = 2;
258 cap->outputs = 1;
259 }
260 break;
261
262 case ENCODER_SET_NORM:
263 {
264 int iarg = *(int *) arg;
265
266 dprintk(1, KERN_DEBUG "%s_command: set norm %d",
267 I2C_NAME(client), iarg);
268
269 switch (iarg) {
270
271 case VIDEO_MODE_NTSC:
272 adv7170_write_block(client, init_NTSC,
273 sizeof(init_NTSC));
274 if (encoder->input == 0)
275 adv7170_write(client, 0x02, 0x0e); // Enable genlock
276 adv7170_write(client, 0x07, TR0MODE | TR0RST);
277 adv7170_write(client, 0x07, TR0MODE);
278 break;
279
280 case VIDEO_MODE_PAL:
281 adv7170_write_block(client, init_PAL,
282 sizeof(init_PAL));
283 if (encoder->input == 0)
284 adv7170_write(client, 0x02, 0x0e); // Enable genlock
285 adv7170_write(client, 0x07, TR0MODE | TR0RST);
286 adv7170_write(client, 0x07, TR0MODE);
287 break;
288
289 default:
290 dprintk(1, KERN_ERR "%s: illegal norm: %d\n",
291 I2C_NAME(client), iarg);
292 return -EINVAL;
293
294 }
295 dprintk(1, KERN_DEBUG "%s: switched to %s\n", I2C_NAME(client),
296 norms[iarg]);
297 encoder->norm = iarg;
298 }
299 break;
300
301 case ENCODER_SET_INPUT:
302 {
303 int iarg = *(int *) arg;
304
305 /* RJ: *iarg = 0: input is from decoder
306 *iarg = 1: input is from ZR36060
307 *iarg = 2: color bar */
308
309 dprintk(1, KERN_DEBUG "%s_command: set input from %s\n",
310 I2C_NAME(client),
311 iarg == 0 ? "decoder" : "ZR36060");
312
313 switch (iarg) {
314
315 case 0:
316 adv7170_write(client, 0x01, 0x20);
317 adv7170_write(client, 0x08, TR1CAPT); /* TR1 */
318 adv7170_write(client, 0x02, 0x0e); // Enable genlock
319 adv7170_write(client, 0x07, TR0MODE | TR0RST);
320 adv7170_write(client, 0x07, TR0MODE);
321 //udelay(10);
322 break;
323
324 case 1:
325 adv7170_write(client, 0x01, 0x00);
326 adv7170_write(client, 0x08, TR1PLAY); /* TR1 */
327 adv7170_write(client, 0x02, 0x08);
328 adv7170_write(client, 0x07, TR0MODE | TR0RST);
329 adv7170_write(client, 0x07, TR0MODE);
330 //udelay(10);
331 break;
332
333 default:
334 dprintk(1, KERN_ERR "%s: illegal input: %d\n",
335 I2C_NAME(client), iarg);
336 return -EINVAL;
337
338 }
339 dprintk(1, KERN_DEBUG "%s: switched to %s\n", I2C_NAME(client),
340 inputs[iarg]);
341 encoder->input = iarg;
342 }
343 break;
344
345 case ENCODER_SET_OUTPUT:
346 {
347 int *iarg = arg;
348
349 /* not much choice of outputs */
350 if (*iarg != 0) {
351 return -EINVAL;
352 }
353 }
354 break;
355
356 case ENCODER_ENABLE_OUTPUT:
357 {
358 int *iarg = arg;
359
360 encoder->enable = !!*iarg;
361 }
362 break;
363
364 default:
365 return -EINVAL;
366 }
367
368 return 0;
369 }
370
371 /* ----------------------------------------------------------------------- */
372
373 /*
374 * Generic i2c probe
375 * concerning the addresses: i2c wants 7 bit (without the r/w bit), so '>>1'
376 */
377 static unsigned short normal_i2c[] =
378 { I2C_ADV7170 >> 1, (I2C_ADV7170 >> 1) + 1,
379 I2C_ADV7171 >> 1, (I2C_ADV7171 >> 1) + 1,
380 I2C_CLIENT_END
381 };
382
383 static unsigned short ignore = I2C_CLIENT_END;
384
385 static struct i2c_client_address_data addr_data = {
386 .normal_i2c = normal_i2c,
387 .probe = &ignore,
388 .ignore = &ignore,
389 };
390
391 static struct i2c_driver i2c_driver_adv7170;
392
393 static int
394 adv7170_detect_client (struct i2c_adapter *adapter,
395 int address,
396 int kind)
397 {
398 int i;
399 struct i2c_client *client;
400 struct adv7170 *encoder;
401 char *dname;
402
403 dprintk(1,
404 KERN_INFO
405 "adv7170.c: detecting adv7170 client on address 0x%x\n",
406 address << 1);
407
408 /* Check if the adapter supports the needed features */
409 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
410 return 0;
411
412 client = kzalloc(sizeof(struct i2c_client), GFP_KERNEL);
413 if (client == 0)
414 return -ENOMEM;
415 client->addr = address;
416 client->adapter = adapter;
417 client->driver = &i2c_driver_adv7170;
418 if ((client->addr == I2C_ADV7170 >> 1) ||
419 (client->addr == (I2C_ADV7170 >> 1) + 1)) {
420 dname = adv7170_name;
421 } else if ((client->addr == I2C_ADV7171 >> 1) ||
422 (client->addr == (I2C_ADV7171 >> 1) + 1)) {
423 dname = adv7171_name;
424 } else {
425 /* We should never get here!!! */
426 kfree(client);
427 return 0;
428 }
429 strlcpy(I2C_NAME(client), dname, sizeof(I2C_NAME(client)));
430
431 encoder = kzalloc(sizeof(struct adv7170), GFP_KERNEL);
432 if (encoder == NULL) {
433 kfree(client);
434 return -ENOMEM;
435 }
436 encoder->norm = VIDEO_MODE_NTSC;
437 encoder->input = 0;
438 encoder->enable = 1;
439 i2c_set_clientdata(client, encoder);
440
441 i = i2c_attach_client(client);
442 if (i) {
443 kfree(client);
444 kfree(encoder);
445 return i;
446 }
447
448 i = adv7170_write_block(client, init_NTSC, sizeof(init_NTSC));
449 if (i >= 0) {
450 i = adv7170_write(client, 0x07, TR0MODE | TR0RST);
451 i = adv7170_write(client, 0x07, TR0MODE);
452 i = adv7170_read(client, 0x12);
453 dprintk(1, KERN_INFO "%s_attach: rev. %d at 0x%02x\n",
454 I2C_NAME(client), i & 1, client->addr << 1);
455 }
456 if (i < 0) {
457 dprintk(1, KERN_ERR "%s_attach: init error 0x%x\n",
458 I2C_NAME(client), i);
459 }
460
461 return 0;
462 }
463
464 static int
465 adv7170_attach_adapter (struct i2c_adapter *adapter)
466 {
467 dprintk(1,
468 KERN_INFO
469 "adv7170.c: starting probe for adapter %s (0x%x)\n",
470 I2C_NAME(adapter), adapter->id);
471 return i2c_probe(adapter, &addr_data, &adv7170_detect_client);
472 }
473
474 static int
475 adv7170_detach_client (struct i2c_client *client)
476 {
477 struct adv7170 *encoder = i2c_get_clientdata(client);
478 int err;
479
480 err = i2c_detach_client(client);
481 if (err) {
482 return err;
483 }
484
485 kfree(encoder);
486 kfree(client);
487
488 return 0;
489 }
490
491 /* ----------------------------------------------------------------------- */
492
493 static struct i2c_driver i2c_driver_adv7170 = {
494 .driver = {
495 .name = "adv7170", /* name */
496 },
497
498 .id = I2C_DRIVERID_ADV7170,
499
500 .attach_adapter = adv7170_attach_adapter,
501 .detach_client = adv7170_detach_client,
502 .command = adv7170_command,
503 };
504
505 static int __init
506 adv7170_init (void)
507 {
508 return i2c_add_driver(&i2c_driver_adv7170);
509 }
510
511 static void __exit
512 adv7170_exit (void)
513 {
514 i2c_del_driver(&i2c_driver_adv7170);
515 }
516
517 module_init(adv7170_init);
518 module_exit(adv7170_exit);
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