summaryrefslogtreecommitdiffstats
path: root/drivers/media/video/bt819.c
blob: 3ee0afca76a7f1b206a39688648aacbd68e4ae5e (plain)
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
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
/* 
 *  bt819 - BT819A VideoStream Decoder (Rockwell Part)
 *
 * Copyright (C) 1999 Mike Bernson <mike@mlb.org>
 * Copyright (C) 1998 Dave Perks <dperks@ibm.net>
 *
 * Modifications for LML33/DC10plus unified driver
 * Copyright (C) 2000 Serguei Miridonov <mirsev@cicese.mx>
 *  
 * Changes by Ronald Bultje <rbultje@ronald.bitfreak.net>
 *    - moved over to linux>=2.4.x i2c protocol (9/9/2002)
 *
 * This code was modify/ported from the saa7111 driver written
 * by Dave Perks.
 *
 * 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("Brooktree-819 video decoder driver");
MODULE_AUTHOR("Mike Bernson & Dave Perks");
MODULE_LICENSE("GPL");

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

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

#include <linux/video_decoder.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 bt819 {
	unsigned char reg[32];

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

struct timing {
	int hactive;
	int hdelay;
	int vactive;
	int vdelay;
	int hscale;
	int vscale;
};

/* for values, see the bt819 datasheet */
static struct timing timing_data[] = {
	{864 - 24, 20, 625 - 2, 1, 0x0504, 0x0000},
	{858 - 24, 20, 525 - 2, 1, 0x00f8, 0x0000},
};

#define   I2C_BT819        0x8a

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

static inline int
bt819_write (struct i2c_client *client,
	     u8                 reg,
	     u8                 value)
{
	struct bt819 *decoder = i2c_get_clientdata(client);

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

static inline int
bt819_setbit (struct i2c_client *client,
	      u8                 reg,
	      u8                 bit,
	      u8                 value)
{
	struct bt819 *decoder = i2c_get_clientdata(client);

	return bt819_write(client, reg,
			   (decoder->
			    reg[reg] & ~(1 << bit)) |
			    (value ? (1 << bit) : 0));
}

static int
bt819_write_block (struct i2c_client *client,
		   const u8          *data,
		   unsigned int       len)
{
	int ret = -1;
	u8 reg;

	/* the bt819 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 bt819 *decoder = 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++] =
				    decoder->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 = bt819_write(client, reg, *data++)) < 0)
				break;
			len -= 2;
		}
	}

	return ret;
}

static inline int
bt819_read (struct i2c_client *client,
	    u8                 reg)
{
	return i2c_smbus_read_byte_data(client, reg);
}

static int
bt819_init (struct i2c_client *client)
{
	struct bt819 *decoder = i2c_get_clientdata(client);

	static unsigned char init[] = {
		//0x1f, 0x00,     /* Reset */
		0x01, 0x59,	/* 0x01 input format */
		0x02, 0x00,	/* 0x02 temporal decimation */
		0x03, 0x12,	/* 0x03 Cropping msb */
		0x04, 0x16,	/* 0x04 Vertical Delay, lsb */
		0x05, 0xe0,	/* 0x05 Vertical Active lsb */
		0x06, 0x80,	/* 0x06 Horizontal Delay lsb */
		0x07, 0xd0,	/* 0x07 Horizontal Active lsb */
		0x08, 0x00,	/* 0x08 Horizontal Scaling msb */
		0x09, 0xf8,	/* 0x09 Horizontal Scaling lsb */
		0x0a, 0x00,	/* 0x0a Brightness control */
		0x0b, 0x30,	/* 0x0b Miscellaneous control */
		0x0c, 0xd8,	/* 0x0c Luma Gain lsb */
		0x0d, 0xfe,	/* 0x0d Chroma Gain (U) lsb */
		0x0e, 0xb4,	/* 0x0e Chroma Gain (V) msb */
		0x0f, 0x00,	/* 0x0f Hue control */
		0x12, 0x04,	/* 0x12 Output Format */
		0x13, 0x20,	/* 0x13 Vertial Scaling msb 0x00
					   chroma comb OFF, line drop scaling, interlace scaling
					   BUG? Why does turning the chroma comb on fuck up color?
					   Bug in the bt819 stepping on my board?
					*/
		0x14, 0x00,	/* 0x14 Vertial Scaling lsb */
		0x16, 0x07,	/* 0x16 Video Timing Polarity 
					   ACTIVE=active low
					   FIELD: high=odd, 
					   vreset=active high,
					   hreset=active high */
		0x18, 0x68,	/* 0x18 AGC Delay */
		0x19, 0x5d,	/* 0x19 Burst Gate Delay */
		0x1a, 0x80,	/* 0x1a ADC Interface */
	};

	struct timing *timing = &timing_data[decoder->norm];

	init[0x03 * 2 - 1] =
	    (((timing->vdelay >> 8) & 0x03) << 6) | (((timing->
						       vactive >> 8) &
						      0x03) << 4) |
	    (((timing->hdelay >> 8) & 0x03) << 2) | ((timing->
						      hactive >> 8) &
						     0x03);
	init[0x04 * 2 - 1] = timing->vdelay & 0xff;
	init[0x05 * 2 - 1] = timing->vactive & 0xff;
	init[0x06 * 2 - 1] = timing->hdelay & 0xff;
	init[0x07 * 2 - 1] = timing->hactive & 0xff;
	init[0x08 * 2 - 1] = timing->hscale >> 8;
	init[0x09 * 2 - 1] = timing->hscale & 0xff;
	/* 0x15 in array is address 0x19 */
	init[0x15 * 2 - 1] = (decoder->norm == 0) ? 115 : 93;	/* Chroma burst delay */
	/* reset */
	bt819_write(client, 0x1f, 0x00);
	mdelay(1);

	/* init */
	return bt819_write_block(client, init, sizeof(init));

}

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

static int
bt819_command (struct i2c_client *client,
	       unsigned int       cmd,
	       void              *arg)
{
	int temp;

	struct bt819 *decoder = i2c_get_clientdata(client);

	if (!decoder->initialized) {	// First call to bt819_init could be
		bt819_init(client);	// without #FRST = 0
		decoder->initialized = 1;
	}

	switch (cmd) {

	case 0:
		/* This is just for testing!!! */
		bt819_init(client);
		break;

	case DECODER_GET_CAPABILITIES:
	{
		struct video_decoder_capability *cap = arg;

		cap->flags = VIDEO_DECODER_PAL |
			     VIDEO_DECODER_NTSC |
			     VIDEO_DECODER_AUTO |
			     VIDEO_DECODER_CCIR;
		cap->inputs = 8;
		cap->outputs = 1;
	}
		break;

	case DECODER_GET_STATUS:
	{
		int *iarg = arg;
		int status;
		int res;

		status = bt819_read(client, 0x00);
		res = 0;
		if ((status & 0x80)) {
			res |= DECODER_STATUS_GOOD;
		}
		switch (decoder->norm) {
		case VIDEO_MODE_NTSC:
			res |= DECODER_STATUS_NTSC;
			break;
		case VIDEO_MODE_PAL:
			res |= DECODER_STATUS_PAL;
			break;
		default:
		case VIDEO_MODE_AUTO:
			if ((status & 0x10)) {
				res |= DECODER_STATUS_PAL;
			} else {
				res |= DECODER_STATUS_NTSC;
			}
			break;
		}
		res |= DECODER_STATUS_COLOR;
		*iarg = res;

		dprintk(1, KERN_INFO "%s: get status %x\n", I2C_NAME(client),
			*iarg);
	}
		break;

	case DECODER_SET_NORM:
	{
		int *iarg = arg;
		struct timing *timing = NULL;

		dprintk(1, KERN_INFO "%s: set norm %x\n", I2C_NAME(client),
			*iarg);

		switch (*iarg) {
		case VIDEO_MODE_NTSC:
			bt819_setbit(client, 0x01, 0, 1);
			bt819_setbit(client, 0x01, 1, 0);
			bt819_setbit(client, 0x01, 5, 0);
			bt819_write(client, 0x18, 0x68);
			bt819_write(client, 0x19, 0x5d);
			//bt819_setbit(client, 0x1a,  5, 1);
			timing = &timing_data[VIDEO_MODE_NTSC];
			break;
		case VIDEO_MODE_PAL:
			bt819_setbit(client, 0x01, 0, 1);
			bt819_setbit(client, 0x01, 1, 1);
			bt819_setbit(client, 0x01, 5, 1);
			bt819_write(client, 0x18, 0x7f);
			bt819_write(client, 0x19, 0x72);
			//bt819_setbit(client, 0x1a,  5, 0);
			timing = &timing_data[VIDEO_MODE_PAL];
			break;
		case VIDEO_MODE_AUTO:
			bt819_setbit(client, 0x01, 0, 0);
			bt819_setbit(client, 0x01, 1, 0);
			break;
		default:
			dprintk(1,
				KERN_ERR
				"%s: unsupported norm %d\n",
				I2C_NAME(client), *iarg);
			return -EINVAL;
		}

		if (timing) {
			bt819_write(client, 0x03,
				    (((timing->vdelay >> 8) & 0x03) << 6) |
				    (((timing->vactive >> 8) & 0x03) << 4) |
				    (((timing->hdelay >> 8) & 0x03) << 2) |
				     ((timing->hactive >> 8) & 0x03) );
			bt819_write(client, 0x04, timing->vdelay & 0xff);
			bt819_write(client, 0x05, timing->vactive & 0xff);
			bt819_write(client, 0x06, timing->hdelay & 0xff);
			bt819_write(client, 0x07, timing->hactive & 0xff);
			bt819_write(client, 0x08, (timing->hscale >> 8) & 0xff);
			bt819_write(client, 0x09, timing->hscale & 0xff);
		}

		decoder->norm = *iarg;
	}
		break;

	case DECODER_SET_INPUT:
	{
		int *iarg = arg;

		dprintk(1, KERN_INFO "%s: set input %x\n", I2C_NAME(client),
			*iarg);

		if (*iarg < 0 || *iarg > 7) {
			return -EINVAL;
		}

		if (decoder->input != *iarg) {
			decoder->input = *iarg;
			/* select mode */
			if (decoder->input == 0) {
				bt819_setbit(client, 0x0b, 6, 0);
				bt819_setbit(client, 0x1a, 1, 1);
			} else {
				bt819_setbit(client, 0x0b, 6, 1);
				bt819_setbit(client, 0x1a, 1, 0);
			}
		}
	}
		break;

	case DECODER_SET_OUTPUT:
	{
		int *iarg = arg;

		dprintk(1, KERN_INFO "%s: set output %x\n", I2C_NAME(client),
			*iarg);

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

	case DECODER_ENABLE_OUTPUT:
	{
		int *iarg = arg;
		int enable = (*iarg != 0);

		dprintk(1, KERN_INFO "%s: enable output %x\n",
			I2C_NAME(client), *iarg);

		if (decoder->enable != enable) {
			decoder->enable = enable;

			if (decoder->enable) {
				bt819_setbit(client, 0x16, 7, 0);
			} else {
				bt819_setbit(client, 0x16, 7, 1);
			}
		}
	}
		break;

	case DECODER_SET_PICTURE:
	{
		struct video_picture *pic = arg;

		dprintk(1,
			KERN_INFO
			"%s: set picture brightness %d contrast %d colour %d\n",
			I2C_NAME(client), pic->brightness, pic->contrast,
			pic->colour);


		if (decoder->bright != pic->brightness) {
			/* We want -128 to 127 we get 0-65535 */
			decoder->bright = pic->brightness;
			bt819_write(client, 0x0a,
				    (decoder->bright >> 8) - 128);
		}

		if (decoder->contrast != pic->contrast) {
			/* We want 0 to 511 we get 0-65535 */
			decoder->contrast = pic->contrast;
			bt819_write(client, 0x0c,
				    (decoder->contrast >> 7) & 0xff);
			bt819_setbit(client, 0x0b, 2,
				     ((decoder->contrast >> 15) & 0x01));
		}

		if (decoder->sat != pic->colour) {
			/* We want 0 to 511 we get 0-65535 */
			decoder->sat = pic->colour;
			bt819_write(client, 0x0d,
				    (decoder->sat >> 7) & 0xff);
			bt819_setbit(client, 0x0b, 1,
				     ((decoder->sat >> 15) & 0x01));

			temp = (decoder->sat * 201) / 237;
			bt819_write(client, 0x0e, (temp >> 7) & 0xff);
			bt819_setbit(client, 0x0b, 0, (temp >> 15) & 0x01);
		}

		if (decoder->hue != pic->hue) {
			/* We want -128 to 127 we get 0-65535 */
			decoder->hue = pic->hue;
			bt819_write(client, 0x0f,
				    128 - (decoder->hue >> 8));
		}
	}
		break;

	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_BT819 >> 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_bt819;

static int
bt819_detect_client (struct i2c_adapter *adapter,
		     int                 address,
		     int                 kind)
{
	int i, id;
	struct bt819 *decoder;
	struct i2c_client *client;

	dprintk(1,
		KERN_INFO
		"saa7111.c: detecting bt819 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_bt819;
	client->flags = I2C_CLIENT_ALLOW_USE;

	decoder = kmalloc(sizeof(struct bt819), GFP_KERNEL);
	if (decoder == NULL) {
		kfree(client);
		return -ENOMEM;
	}

	memset(decoder, 0, sizeof(struct bt819));
	decoder->norm = VIDEO_MODE_NTSC;
	decoder->input = 0;
	decoder->enable = 1;
	decoder->bright = 32768;
	decoder->contrast = 32768;
	decoder->hue = 32768;
	decoder->sat = 32768;
	decoder->initialized = 0;
	i2c_set_clientdata(client, decoder);

	id = bt819_read(client, 0x17);
	switch (id & 0xf0) {
	case 0x70:
		strlcpy(I2C_NAME(client), "bt819a", sizeof(I2C_NAME(client)));
		break;
	case 0x60:
		strlcpy(I2C_NAME(client), "bt817a", sizeof(I2C_NAME(client)));
		break;
	case 0x20:
		strlcpy(I2C_NAME(client), "bt815a", sizeof(I2C_NAME(client)));
		break;
	default:
		dprintk(1,
			KERN_ERR
			"bt819: unknown chip version 0x%x (ver 0x%x)\n",
			id & 0xf0, id & 0x0f);
		kfree(decoder);
		kfree(client);
		return 0;
	}

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

	i = bt819_init(client);
	if (i < 0) {
		dprintk(1, KERN_ERR "%s_attach: init status %d\n",
			I2C_NAME(client), i);
	} else {
		dprintk(1,
			KERN_INFO
			"%s_attach: chip version 0x%x at address 0x%x\n",
			I2C_NAME(client), id & 0x0f,
			client->addr << 1);
	}

	return 0;
}

static int
bt819_attach_adapter (struct i2c_adapter *adapter)
{
	return i2c_probe(adapter, &addr_data, &bt819_detect_client);
}

static int
bt819_detach_client (struct i2c_client *client)
{
	struct bt819 *decoder = i2c_get_clientdata(client);
	int err;

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

	kfree(decoder);
	kfree(client);

	return 0;
}

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

static struct i2c_driver i2c_driver_bt819 = {
	.owner = THIS_MODULE,
	.name = "bt819",

	.id = I2C_DRIVERID_BT819,
	.flags = I2C_DF_NOTIFY,

	.attach_adapter = bt819_attach_adapter,
	.detach_client = bt819_detach_client,
	.command = bt819_command,
};

static int __init
bt819_init_module (void)
{
	return i2c_add_driver(&i2c_driver_bt819);
}

static void __exit
bt819_exit (void)
{
	i2c_del_driver(&i2c_driver_bt819);
}

module_init(bt819_init_module);
module_exit(bt819_exit);
OpenPOWER on IntegriCloud