aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/media/video/adv7175.c
blob: 4fc08b17d4d085933d0e420558f3d8e0b29b0560 (plain) (blame)
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
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
/* 
 *  adv7175 - adv7175a video encoder driver version 0.0.3
 *
 * Copyright (C) 1998 Dave Perks <dperks@ibm.net>
 * Copyright (C) 1999 Wolfgang Scherr <scherr@net4you.net>
 * Copyright (C) 2000 Serguei Miridonov <mirsev@cicese.mx>
 *    - some corrections for Pinnacle Systems Inc. DC10plus card.
 *
 * Changes by Ronald Bultje <rbultje@ronald.bitfreak.net>
 *    - moved over to linux>=2.4.x i2c protocol (9/9/2002)
 *
 * 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.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

#include <linux/module.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/errno.h>
#include <linux/fs.h>
#include <linux/kernel.h>
#include <linux/major.h>
#include <linux/slab.h>
#include <linux/mm.h>
#include <linux/pci.h>
#include <linux/signal.h>
#include <asm/io.h>
#include <asm/pgtable.h>
#include <asm/page.h>
#include <linux/sched.h>
#include <linux/types.h>

#include <linux/videodev.h>
#include <asm/uaccess.h>

MODULE_DESCRIPTION("Analog Devices ADV7175 video encoder driver");
MODULE_AUTHOR("Dave Perks");
MODULE_LICENSE("GPL");

#include <linux/i2c.h>
#include <linux/i2c-dev.h>

#define I2C_NAME(s) (s)->name

#include <linux/video_encoder.h>

static int debug = 0;
module_param(debug, int, 0);
MODULE_PARM_DESC(debug, "Debug level (0-1)");

#define dprintk(num, format, args...) \
	do { \
		if (debug >= num) \
			printk(format, ##args); \
	} while (0)

/* ----------------------------------------------------------------------- */

struct adv7175 {
	unsigned char reg[128];

	int norm;
	int input;
	int enable;
	int bright;
	int contrast;
	int hue;
	int sat;
};

#define   I2C_ADV7175        0xd4
#define   I2C_ADV7176        0x54

static char adv7175_name[] = "adv7175";
static char adv7176_name[] = "adv7176";

static char *inputs[] = { "pass_through", "play_back", "color_bar" };
static char *norms[] = { "PAL", "NTSC", "SECAM->PAL (may not work!)" };

/* ----------------------------------------------------------------------- */

static inline int
adv7175_write (struct i2c_client *client,
	       u8                 reg,
	       u8                 value)
{
	struct adv7175 *encoder = i2c_get_clientdata(client);

	encoder->reg[reg] = value;
	return i2c_smbus_write_byte_data(client, reg, value);
}

static inline int
adv7175_read (struct i2c_client *client,
	      u8                 reg)
{
	return i2c_smbus_read_byte_data(client, reg);
}

static int
adv7175_write_block (struct i2c_client *client,
		     const u8          *data,
		     unsigned int       len)
{
	int ret = -1;
	u8 reg;

	/* the adv7175 has an autoincrement function, use it if
	 * the adapter understands raw I2C */
	if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
		/* do raw I2C, not smbus compatible */
		struct adv7175 *encoder = i2c_get_clientdata(client);
		struct i2c_msg msg;
		u8 block_data[32];

		msg.addr = client->addr;
		msg.flags = 0;
		while (len >= 2) {
			msg.buf = (char *) block_data;
			msg.len = 0;
			block_data[msg.len++] = reg = data[0];
			do {
				block_data[msg.len++] =
				    encoder->reg[reg++] = data[1];
				len -= 2;
				data += 2;
			} while (len >= 2 && data[0] == reg &&
				 msg.len < 32);
			if ((ret = i2c_transfer(client->adapter,
						&msg, 1)) < 0)
				break;
		}
	} else {
		/* do some slow I2C emulation kind of thing */
		while (len >= 2) {
			reg = *data++;
			if ((ret = adv7175_write(client, reg,
						 *data++)) < 0)
				break;
			len -= 2;
		}
	}

	return ret;
}

static void
set_subcarrier_freq (struct i2c_client *client,
		     int                pass_through)
{
	/* for some reason pass_through NTSC needs
	 * a different sub-carrier freq to remain stable. */
	if(pass_through)
		adv7175_write(client, 0x02, 0x00);
	else
		adv7175_write(client, 0x02, 0x55);

	adv7175_write(client, 0x03, 0x55);
	adv7175_write(client, 0x04, 0x55);
	adv7175_write(client, 0x05, 0x25);
}

#ifdef ENCODER_DUMP
static void
dump (struct i2c_client *client)
{
	struct adv7175 *encoder = i2c_get_clientdata(client);
	int i, j;

	printk(KERN_INFO "%s: registry dump\n", I2C_NAME(client));
	for (i = 0; i < 182 / 8; i++) {
		printk("%s: 0x%02x -", I2C_NAME(client), i * 8);
		for (j = 0; j < 8; j++) {
			printk(" 0x%02x", encoder->reg[i * 8 + j]);
		}
		printk("\n");
	}
}
#endif

/* ----------------------------------------------------------------------- */
// Output filter:  S-Video  Composite

#define MR050       0x11	//0x09
#define MR060       0x14	//0x0c

//---------------------------------------------------------------------------

#define TR0MODE     0x46
#define TR0RST	    0x80

#define TR1CAPT	    0x80
#define TR1PLAY	    0x00

static const unsigned char init_common[] = {

	0x00, MR050,		/* MR0, PAL enabled */
	0x01, 0x00,		/* MR1 */
	0x02, 0x0c,		/* subc. freq. */
	0x03, 0x8c,		/* subc. freq. */
	0x04, 0x79,		/* subc. freq. */
	0x05, 0x26,		/* subc. freq. */
	0x06, 0x40,		/* subc. phase */

	0x07, TR0MODE,		/* TR0, 16bit */
	0x08, 0x21,		/*  */
	0x09, 0x00,		/*  */
	0x0a, 0x00,		/*  */
	0x0b, 0x00,		/*  */
	0x0c, TR1CAPT,		/* TR1 */
	0x0d, 0x4f,		/* MR2 */
	0x0e, 0x00,		/*  */
	0x0f, 0x00,		/*  */
	0x10, 0x00,		/*  */
	0x11, 0x00,		/*  */
};

static const unsigned char init_pal[] = {
	0x00, MR050,		/* MR0, PAL enabled */
	0x01, 0x00,		/* MR1 */
	0x02, 0x0c,		/* subc. freq. */
	0x03, 0x8c,		/* subc. freq. */
	0x04, 0x79,		/* subc. freq. */
	0x05, 0x26,		/* subc. freq. */
	0x06, 0x40,		/* subc. phase */
};

static const unsigned char init_ntsc[] = {
	0x00, MR060,		/* MR0, NTSC enabled */
	0x01, 0x00,		/* MR1 */
	0x02, 0x55,		/* subc. freq. */
	0x03, 0x55,		/* subc. freq. */
	0x04, 0x55,		/* subc. freq. */
	0x05, 0x25,		/* subc. freq. */
	0x06, 0x1a,		/* subc. phase */
};

static int
adv7175_command (struct i2c_client *client,
		 unsigned int       cmd,
		 void              *arg)
{
	struct adv7175 *encoder = i2c_get_clientdata(client);

	switch (cmd) {

	case 0:
		/* This is just for testing!!! */
		adv7175_write_block(client, init_common,
				    sizeof(init_common));
		adv7175_write(client, 0x07, TR0MODE | TR0RST);
		adv7175_write(client, 0x07, TR0MODE);
	        break;

	case ENCODER_GET_CAPABILITIES:
	{
		struct video_encoder_capability *cap = arg;

		cap->flags = VIDEO_ENCODER_PAL |
			     VIDEO_ENCODER_NTSC |
			     VIDEO_ENCODER_SECAM; /* well, hacky */
		cap->inputs = 2;
		cap->outputs = 1;
	}
		break;

	case ENCODER_SET_NORM:
	{
		int iarg = *(int *) arg;

		switch (iarg) {

		case VIDEO_MODE_NTSC:
			adv7175_write_block(client, init_ntsc,
					    sizeof(init_ntsc));
			if (encoder->input == 0)
				adv7175_write(client, 0x0d, 0x4f);	// Enable genlock
			adv7175_write(client, 0x07, TR0MODE | TR0RST);
			adv7175_write(client, 0x07, TR0MODE);
			break;

		case VIDEO_MODE_PAL:
			adv7175_write_block(client, init_pal,
					    sizeof(init_pal));
			if (encoder->input == 0)
				adv7175_write(client, 0x0d, 0x4f);	// Enable genlock
			adv7175_write(client, 0x07, TR0MODE | TR0RST);
			adv7175_write(client, 0x07, TR0MODE);
			break;

		case VIDEO_MODE_SECAM:	// WARNING! ADV7176 does not support SECAM.
			/* This is an attempt to convert
			 * SECAM->PAL (typically it does not work
			 * due to genlock: when decoder is in SECAM
			 * and encoder in in PAL the subcarrier can
			 * not be syncronized with horizontal
			 * quency) */
			adv7175_write_block(client, init_pal,
					    sizeof(init_pal));
			if (encoder->input == 0)
				adv7175_write(client, 0x0d, 0x49);	// Disable genlock
			adv7175_write(client, 0x07, TR0MODE | TR0RST);
			adv7175_write(client, 0x07, TR0MODE);
			break;
		default:
			dprintk(1, KERN_ERR "%s: illegal norm: %d\n",
				I2C_NAME(client), iarg);
			return -EINVAL;

		}
		dprintk(1, KERN_INFO "%s: switched to %s\n", I2C_NAME(client),
			norms[iarg]);
		encoder->norm = iarg;
	}
		break;

	case ENCODER_SET_INPUT:
	{
		int iarg = *(int *) arg;

		/* RJ: *iarg = 0: input is from SAA7110
		 *iarg = 1: input is from ZR36060
		 *iarg = 2: color bar */

		switch (iarg) {

		case 0:
			adv7175_write(client, 0x01, 0x00);

			if (encoder->norm == VIDEO_MODE_NTSC)
				set_subcarrier_freq(client, 1);

			adv7175_write(client, 0x0c, TR1CAPT);	/* TR1 */
			if (encoder->norm == VIDEO_MODE_SECAM)
				adv7175_write(client, 0x0d, 0x49);	// Disable genlock
			else
				adv7175_write(client, 0x0d, 0x4f);	// Enable genlock
			adv7175_write(client, 0x07, TR0MODE | TR0RST);
			adv7175_write(client, 0x07, TR0MODE);
			//udelay(10);
			break;

		case 1:
			adv7175_write(client, 0x01, 0x00);

			if (encoder->norm == VIDEO_MODE_NTSC)
				set_subcarrier_freq(client, 0);

			adv7175_write(client, 0x0c, TR1PLAY);	/* TR1 */
			adv7175_write(client, 0x0d, 0x49);
			adv7175_write(client, 0x07, TR0MODE | TR0RST);
			adv7175_write(client, 0x07, TR0MODE);
			//udelay(10);
			break;

		case 2:
			adv7175_write(client, 0x01, 0x80);

			if (encoder->norm == VIDEO_MODE_NTSC)
				set_subcarrier_freq(client, 0);

			adv7175_write(client, 0x0d, 0x49);
			adv7175_write(client, 0x07, TR0MODE | TR0RST);
			adv7175_write(client, 0x07, TR0MODE);
			//udelay(10);
			break;

		default:
			dprintk(1, KERN_ERR "%s: illegal input: %d\n",
				I2C_NAME(client), iarg);
			return -EINVAL;

		}
		dprintk(1, KERN_INFO "%s: switched to %s\n", I2C_NAME(client),
			inputs[iarg]);
		encoder->input = iarg;
	}
		break;

	case ENCODER_SET_OUTPUT:
	{
		int *iarg = arg;

		/* not much choice of outputs */
		if (*iarg != 0) {
			return -EINVAL;
		}
	}
		break;

	case ENCODER_ENABLE_OUTPUT:
	{
		int *iarg = arg;

		encoder->enable = !!*iarg;
	}
		break;

#ifdef ENCODER_DUMP
	case ENCODER_DUMP:
	{
		dump(client);
	}
		break;
#endif

	default:
		return -EINVAL;
	}

	return 0;
}

/* ----------------------------------------------------------------------- */

/*
 * Generic i2c probe
 * concerning the addresses: i2c wants 7 bit (without the r/w bit), so '>>1'
 */
static unsigned short normal_i2c[] =
    { I2C_ADV7175 >> 1, (I2C_ADV7175 >> 1) + 1,
	I2C_ADV7176 >> 1, (I2C_ADV7176 >> 1) + 1,
	I2C_CLIENT_END
};

static unsigned short ignore = I2C_CLIENT_END;
                                                                                
static struct i2c_client_address_data addr_data = {
	.normal_i2c		= normal_i2c,
	.probe			= &ignore,
	.ignore			= &ignore,
};

static struct i2c_driver i2c_driver_adv7175;

static int
adv7175_detect_client (struct i2c_adapter *adapter,
		       int                 address,
		       int                 kind)
{
	int i;
	struct i2c_client *client;
	struct adv7175 *encoder;
	char *dname;

	dprintk(1,
		KERN_INFO
		"adv7175.c: detecting adv7175 client on address 0x%x\n",
		address << 1);

	/* Check if the adapter supports the needed features */
	if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
		return 0;

	client = kmalloc(sizeof(struct i2c_client), GFP_KERNEL);
	if (client == 0)
		return -ENOMEM;
	memset(client, 0, sizeof(struct i2c_client));
	client->addr = address;
	client->adapter = adapter;
	client->driver = &i2c_driver_adv7175;
	client->flags = I2C_CLIENT_ALLOW_USE;
	if ((client->addr == I2C_ADV7175 >> 1) ||
	    (client->addr == (I2C_ADV7175 >> 1) + 1)) {
		dname = adv7175_name;
	} else if ((client->addr == I2C_ADV7176 >> 1) ||
		   (client->addr == (I2C_ADV7176 >> 1) + 1)) {
		dname = adv7176_name;
	} else {
		/* We should never get here!!! */
		kfree(client);
		return 0;
	}
	strlcpy(I2C_NAME(client), dname, sizeof(I2C_NAME(client)));

	encoder = kmalloc(sizeof(struct adv7175), GFP_KERNEL);
	if (encoder == NULL) {
		kfree(client);
		return -ENOMEM;
	}
	memset(encoder, 0, sizeof(struct adv7175));
	encoder->norm = VIDEO_MODE_PAL;
	encoder->input = 0;
	encoder->enable = 1;
	i2c_set_clientdata(client, encoder);

	i = i2c_attach_client(client);
	if (i) {
		kfree(client);
		kfree(encoder);
		return i;
	}

	i = adv7175_write_block(client, init_common, sizeof(init_common));
	if (i >= 0) {
		i = adv7175_write(client, 0x07, TR0MODE | TR0RST);
		i = adv7175_write(client, 0x07, TR0MODE);
		i = adv7175_read(client, 0x12);
		dprintk(1, KERN_INFO "%s_attach: rev. %d at 0x%x\n",
			I2C_NAME(client), i & 1, client->addr << 1);
	}
	if (i < 0) {
		dprintk(1, KERN_ERR "%s_attach: init error 0x%x\n",
			I2C_NAME(client), i);
	}

	return 0;
}

static int
adv7175_attach_adapter (struct i2c_adapter *adapter)
{
	dprintk(1,
		KERN_INFO
		"adv7175.c: starting probe for adapter %s (0x%x)\n",
		I2C_NAME(adapter), adapter->id);
	return i2c_probe(adapter, &addr_data, &adv7175_detect_client);
}

static int
adv7175_detach_client (struct i2c_client *client)
{
	struct adv7175 *encoder = i2c_get_clientdata(client);
	int err;

	err = i2c_detach_client(client);
	if (err) {
		return err;
	}

	kfree(encoder);
	kfree(client);

	return 0;
}

/* ----------------------------------------------------------------------- */

static struct i2c_driver i2c_driver_adv7175 = {
	.owner = THIS_MODULE,
	.name = "adv7175",	/* name */

	.id = I2C_DRIVERID_ADV7175,

	.attach_adapter = adv7175_attach_adapter,
	.detach_client = adv7175_detach_client,
	.command = adv7175_command,
};

static int __init
adv7175_init (void)
{
	return i2c_add_driver(&i2c_driver_adv7175);
}

static void __exit
adv7175_exit (void)
{
	i2c_del_driver(&i2c_driver_adv7175);
}

module_init(adv7175_init);
module_exit(adv7175_exit);