summaryrefslogtreecommitdiffstats
path: root/drivers/media/video/vpx3220.c
blob: cd2064e7733b041f0ddb1031587d38e732968d6b (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
/*
 * vpx3220a, vpx3216b & vpx3214c video decoder driver version 0.0.1
 *
 * Copyright (C) 2001 Laurent Pinchart <lpinchart@freegates.be>
 *
 * 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/types.h>
#include <asm/uaccess.h>
#include <linux/i2c.h>
#include <media/v4l2-common.h>
#include <media/v4l2-i2c-drv-legacy.h>
#include <linux/videodev.h>
#include <linux/videodev2.h>
#include <linux/video_decoder.h>

MODULE_DESCRIPTION("vpx3220a/vpx3216b/vpx3214c video decoder driver");
MODULE_AUTHOR("Laurent Pinchart");
MODULE_LICENSE("GPL");

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

#define VPX_TIMEOUT_COUNT  10

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

struct vpx3220 {
	unsigned char reg[255];

	v4l2_std_id norm;
	int input;
	int enable;
	int bright;
	int contrast;
	int hue;
	int sat;
};

static char *inputs[] = { "internal", "composite", "svideo" };

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

static inline int vpx3220_write(struct i2c_client *client, u8 reg, u8 value)
{
	struct vpx3220 *decoder = i2c_get_clientdata(client);

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

static inline int vpx3220_read(struct i2c_client *client, u8 reg)
{
	return i2c_smbus_read_byte_data(client, reg);
}

static int vpx3220_fp_status(struct i2c_client *client)
{
	unsigned char status;
	unsigned int i;

	for (i = 0; i < VPX_TIMEOUT_COUNT; i++) {
		status = vpx3220_read(client, 0x29);

		if (!(status & 4))
			return 0;

		udelay(10);

		if (need_resched())
			cond_resched();
	}

	return -1;
}

static int vpx3220_fp_write(struct i2c_client *client, u8 fpaddr, u16 data)
{
	/* Write the 16-bit address to the FPWR register */
	if (i2c_smbus_write_word_data(client, 0x27, swab16(fpaddr)) == -1) {
		v4l_dbg(1, debug, client, "%s: failed\n", __func__);
		return -1;
	}

	if (vpx3220_fp_status(client) < 0)
		return -1;

	/* Write the 16-bit data to the FPDAT register */
	if (i2c_smbus_write_word_data(client, 0x28, swab16(data)) == -1) {
		v4l_dbg(1, debug, client, "%s: failed\n", __func__);
		return -1;
	}

	return 0;
}

static u16 vpx3220_fp_read(struct i2c_client *client, u16 fpaddr)
{
	s16 data;

	/* Write the 16-bit address to the FPRD register */
	if (i2c_smbus_write_word_data(client, 0x26, swab16(fpaddr)) == -1) {
		v4l_dbg(1, debug, client, "%s: failed\n", __func__);
		return -1;
	}

	if (vpx3220_fp_status(client) < 0)
		return -1;

	/* Read the 16-bit data from the FPDAT register */
	data = i2c_smbus_read_word_data(client, 0x28);
	if (data == -1) {
		v4l_dbg(1, debug, client, "%s: failed\n", __func__);
		return -1;
	}

	return swab16(data);
}

static int vpx3220_write_block(struct i2c_client *client, const u8 *data, unsigned int len)
{
	u8 reg;
	int ret = -1;

	while (len >= 2) {
		reg = *data++;
		ret = vpx3220_write(client, reg, *data++);
		if (ret < 0)
			break;
		len -= 2;
	}

	return ret;
}

static int vpx3220_write_fp_block(struct i2c_client *client,
		const u16 *data, unsigned int len)
{
	u8 reg;
	int ret = 0;

	while (len > 1) {
		reg = *data++;
		ret |= vpx3220_fp_write(client, reg, *data++);
		len -= 2;
	}

	return ret;
}

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

static const unsigned short init_ntsc[] = {
	0x1c, 0x00,		/* NTSC tint angle */
	0x88, 17,		/* Window 1 vertical */
	0x89, 240,		/* Vertical lines in */
	0x8a, 240,		/* Vertical lines out */
	0x8b, 000,		/* Horizontal begin */
	0x8c, 640,		/* Horizontal length */
	0x8d, 640,		/* Number of pixels */
	0x8f, 0xc00,		/* Disable window 2 */
	0xf0, 0x73,		/* 13.5 MHz transport, Forced
				 * mode, latch windows */
	0xf2, 0x13,		/* NTSC M, composite input */
	0xe7, 0x1e1,		/* Enable vertical standard
				 * locking @ 240 lines */
};

static const unsigned short init_pal[] = {
	0x88, 23,		/* Window 1 vertical begin */
	0x89, 288,		/* Vertical lines in (16 lines
				 * skipped by the VFE) */
	0x8a, 288,		/* Vertical lines out (16 lines
				 * skipped by the VFE) */
	0x8b, 16,		/* Horizontal begin */
	0x8c, 768,		/* Horizontal length */
	0x8d, 784, 		/* Number of pixels
				 * Must be >= Horizontal begin + Horizontal length */
	0x8f, 0xc00,		/* Disable window 2 */
	0xf0, 0x77,		/* 13.5 MHz transport, Forced
				 * mode, latch windows */
	0xf2, 0x3d1,		/* PAL B,G,H,I, composite input */
	0xe7, 0x241,		/* PAL/SECAM set to 288 lines */
};

static const unsigned short init_secam[] = {
	0x88, 23,		/* Window 1 vertical begin */
	0x89, 288,		/* Vertical lines in (16 lines
				 * skipped by the VFE) */
	0x8a, 288,		/* Vertical lines out (16 lines
				 * skipped by the VFE) */
	0x8b, 16,		/* Horizontal begin */
	0x8c, 768,		/* Horizontal length */
	0x8d, 784,		/* Number of pixels
				 * Must be >= Horizontal begin + Horizontal length */
	0x8f, 0xc00,		/* Disable window 2 */
	0xf0, 0x77,		/* 13.5 MHz transport, Forced
				 * mode, latch windows */
	0xf2, 0x3d5,		/* SECAM, composite input */
	0xe7, 0x241,		/* PAL/SECAM set to 288 lines */
};

static const unsigned char init_common[] = {
	0xf2, 0x00,		/* Disable all outputs */
	0x33, 0x0d,		/* Luma : VIN2, Chroma : CIN
				 * (clamp off) */
	0xd8, 0xa8,		/* HREF/VREF active high, VREF
				 * pulse = 2, Odd/Even flag */
	0x20, 0x03,		/* IF compensation 0dB/oct */
	0xe0, 0xff,		/* Open up all comparators */
	0xe1, 0x00,
	0xe2, 0x7f,
	0xe3, 0x80,
	0xe4, 0x7f,
	0xe5, 0x80,
	0xe6, 0x00,		/* Brightness set to 0 */
	0xe7, 0xe0,		/* Contrast to 1.0, noise shaping
				 * 10 to 8 2-bit error diffusion */
	0xe8, 0xf8,		/* YUV422, CbCr binary offset,
				 * ... (p.32) */
	0xea, 0x18,		/* LLC2 connected, output FIFO
				 * reset with VACTintern */
	0xf0, 0x8a,		/* Half full level to 10, bus
				 * shuffler [7:0, 23:16, 15:8] */
	0xf1, 0x18,		/* Single clock, sync mode, no
				 * FE delay, no HLEN counter */
	0xf8, 0x12,		/* Port A, PIXCLK, HF# & FE#
				 * strength to 2 */
	0xf9, 0x24,		/* Port B, HREF, VREF, PREF &
				 * ALPHA strength to 4 */
};

static const unsigned short init_fp[] = {
	0x59, 0,
	0xa0, 2070,		/* ACC reference */
	0xa3, 0,
	0xa4, 0,
	0xa8, 30,
	0xb2, 768,
	0xbe, 27,
	0x58, 0,
	0x26, 0,
	0x4b, 0x298,		/* PLL gain */
};


static int vpx3220_command(struct i2c_client *client, unsigned cmd, void *arg)
{
	struct vpx3220 *decoder = i2c_get_clientdata(client);

	switch (cmd) {
	case VIDIOC_INT_INIT:
	{
		vpx3220_write_block(client, init_common,
				    sizeof(init_common));
		vpx3220_write_fp_block(client, init_fp,
				       sizeof(init_fp) >> 1);
		if (decoder->norm & V4L2_STD_NTSC) {
			vpx3220_write_fp_block(client, init_ntsc,
					       sizeof(init_ntsc) >> 1);
		} else if (decoder->norm & V4L2_STD_PAL) {
			vpx3220_write_fp_block(client, init_pal,
					       sizeof(init_pal) >> 1);
		} else if (decoder->norm & V4L2_STD_SECAM) {
			vpx3220_write_fp_block(client, init_secam,
					       sizeof(init_secam) >> 1);
		} else {
			vpx3220_write_fp_block(client, init_pal,
					       sizeof(init_pal) >> 1);
		}
		break;
	}

	case VIDIOC_QUERYSTD:
	case VIDIOC_INT_G_INPUT_STATUS:
	{
		int res = V4L2_IN_ST_NO_SIGNAL, status;
		v4l2_std_id std = 0;

		v4l_dbg(1, debug, client, "VIDIOC_QUERYSTD/VIDIOC_INT_G_INPUT_STATUS\n");

		status = vpx3220_fp_read(client, 0x0f3);

		v4l_dbg(1, debug, client, "status: 0x%04x\n", status);

		if (status < 0)
			return status;

		if ((status & 0x20) == 0) {
			res = 0;

			switch (status & 0x18) {
			case 0x00:
			case 0x10:
			case 0x14:
			case 0x18:
				std = V4L2_STD_PAL;
				break;

			case 0x08:
				std = V4L2_STD_SECAM;
				break;

			case 0x04:
			case 0x0c:
			case 0x1c:
				std = V4L2_STD_NTSC;
				break;
			}
		}

		if (cmd == VIDIOC_QUERYSTD)
			*(v4l2_std_id *)arg = std;
		else
			*(int *)arg = res;
		break;
	}

	case VIDIOC_S_STD:
	{
		v4l2_std_id *iarg = arg;
		int temp_input;

		/* Here we back up the input selection because it gets
		   overwritten when we fill the registers with the
		   choosen video norm */
		temp_input = vpx3220_fp_read(client, 0xf2);

		v4l_dbg(1, debug, client, "VIDIOC_S_STD %llx\n", *iarg);
		if (*iarg & V4L2_STD_NTSC) {
			vpx3220_write_fp_block(client, init_ntsc,
					       sizeof(init_ntsc) >> 1);
			v4l_dbg(1, debug, client, "norm switched to NTSC\n");
		} else if (*iarg & V4L2_STD_PAL) {
			vpx3220_write_fp_block(client, init_pal,
					       sizeof(init_pal) >> 1);
			v4l_dbg(1, debug, client, "norm switched to PAL\n");
		} else if (*iarg & V4L2_STD_SECAM) {
			vpx3220_write_fp_block(client, init_secam,
					       sizeof(init_secam) >> 1);
			v4l_dbg(1, debug, client, "norm switched to SECAM\n");
		} else {
			return -EINVAL;
		}

		decoder->norm = *iarg;

		/* And here we set the backed up video input again */
		vpx3220_fp_write(client, 0xf2, temp_input | 0x0010);
		udelay(10);
		break;
	}

	case VIDIOC_INT_S_VIDEO_ROUTING:
	{
		struct v4l2_routing *route = arg;
		int data;

		/* RJ:  *iarg = 0: ST8 (PCTV) input
		 *iarg = 1: COMPOSITE  input
		 *iarg = 2: SVHS       input  */

		const int input[3][2] = {
			{0x0c, 0},
			{0x0d, 0},
			{0x0e, 1}
		};

		if (route->input < 0 || route->input > 2)
			return -EINVAL;

		v4l_dbg(1, debug, client, "input switched to %s\n", inputs[route->input]);

		vpx3220_write(client, 0x33, input[route->input][0]);

		data = vpx3220_fp_read(client, 0xf2) & ~(0x0020);
		if (data < 0)
			return data;
		/* 0x0010 is required to latch the setting */
		vpx3220_fp_write(client, 0xf2,
				 data | (input[route->input][1] << 5) | 0x0010);

		udelay(10);
		break;
	}

	case VIDIOC_STREAMON:
	case VIDIOC_STREAMOFF:
	{
		int on = cmd == VIDIOC_STREAMON;
		v4l_dbg(1, debug, client, "VIDIOC_STREAM%s\n", on ? "ON" : "OFF");

		vpx3220_write(client, 0xf2, (on ? 0x1b : 0x00));
		break;
	}

	case VIDIOC_QUERYCTRL:
	{
		struct v4l2_queryctrl *qc = arg;

		switch (qc->id) {
		case V4L2_CID_BRIGHTNESS:
			v4l2_ctrl_query_fill(qc, -128, 127, 1, 0);
			break;

		case V4L2_CID_CONTRAST:
			v4l2_ctrl_query_fill(qc, 0, 63, 1, 32);
			break;

		case V4L2_CID_SATURATION:
			v4l2_ctrl_query_fill(qc, 0, 4095, 1, 2048);
			break;

		case V4L2_CID_HUE:
			v4l2_ctrl_query_fill(qc, -512, 511, 1, 0);
			break;

		default:
			return -EINVAL;
		}
		break;
	}

	case VIDIOC_G_CTRL:
	{
		struct v4l2_control *ctrl = arg;

		switch (ctrl->id) {
		case V4L2_CID_BRIGHTNESS:
			ctrl->value = decoder->bright;
			break;
		case V4L2_CID_CONTRAST:
			ctrl->value = decoder->contrast;
			break;
		case V4L2_CID_SATURATION:
			ctrl->value = decoder->sat;
			break;
		case V4L2_CID_HUE:
			ctrl->value = decoder->hue;
			break;
		default:
			return -EINVAL;
		}
		break;
	}

	case VIDIOC_S_CTRL:
	{
		struct v4l2_control *ctrl = arg;

		switch (ctrl->id) {
		case V4L2_CID_BRIGHTNESS:
			if (decoder->bright != ctrl->value) {
				decoder->bright = ctrl->value;
				vpx3220_write(client, 0xe6, decoder->bright);
			}
			break;
		case V4L2_CID_CONTRAST:
			if (decoder->contrast != ctrl->value) {
				/* Bit 7 and 8 is for noise shaping */
				decoder->contrast = ctrl->value;
				vpx3220_write(client, 0xe7,
						decoder->contrast + 192);
			}
			break;
		case V4L2_CID_SATURATION:
			if (decoder->sat != ctrl->value) {
				decoder->sat = ctrl->value;
				vpx3220_fp_write(client, 0xa0, decoder->sat);
			}
			break;
		case V4L2_CID_HUE:
			if (decoder->hue != ctrl->value) {
				decoder->hue = ctrl->value;
				vpx3220_fp_write(client, 0x1c, decoder->hue);
			}
			break;
		default:
			return -EINVAL;
		}
		break;
	}

	default:
		return -EINVAL;
	}

	return 0;
}

static int vpx3220_init_client(struct i2c_client *client)
{
	vpx3220_write_block(client, init_common, sizeof(init_common));
	vpx3220_write_fp_block(client, init_fp, sizeof(init_fp) >> 1);
	/* Default to PAL */
	vpx3220_write_fp_block(client, init_pal, sizeof(init_pal) >> 1);

	return 0;
}

/* -----------------------------------------------------------------------
 * Client management code
 */

static unsigned short normal_i2c[] = { 0x86 >> 1, 0x8e >> 1, I2C_CLIENT_END };

I2C_CLIENT_INSMOD;

static int vpx3220_probe(struct i2c_client *client,
			const struct i2c_device_id *id)
{
	struct vpx3220 *decoder;
	const char *name = NULL;
	u8 ver;
	u16 pn;

	/* Check if the adapter supports the needed features */
	if (!i2c_check_functionality(client->adapter,
		I2C_FUNC_SMBUS_BYTE_DATA | I2C_FUNC_SMBUS_WORD_DATA))
		return -ENODEV;

	decoder = kzalloc(sizeof(struct vpx3220), GFP_KERNEL);
	if (decoder == NULL)
		return -ENOMEM;
	decoder->norm = V4L2_STD_PAL;
	decoder->input = 0;
	decoder->enable = 1;
	decoder->bright = 32768;
	decoder->contrast = 32768;
	decoder->hue = 32768;
	decoder->sat = 32768;
	i2c_set_clientdata(client, decoder);

	ver = i2c_smbus_read_byte_data(client, 0x00);
	pn = (i2c_smbus_read_byte_data(client, 0x02) << 8) +
		i2c_smbus_read_byte_data(client, 0x01);
	if (ver == 0xec) {
		switch (pn) {
		case 0x4680:
			name = "vpx3220a";
			break;
		case 0x4260:
			name = "vpx3216b";
			break;
		case 0x4280:
			name = "vpx3214c";
			break;
		}
	}
	if (name)
		v4l_info(client, "%s found @ 0x%x (%s)\n", name,
			client->addr << 1, client->adapter->name);
	else
		v4l_info(client, "chip (%02x:%04x) found @ 0x%x (%s)\n",
			ver, pn, client->addr << 1, client->adapter->name);

	vpx3220_init_client(client);
	return 0;
}

static int vpx3220_remove(struct i2c_client *client)
{
	kfree(i2c_get_clientdata(client));
	return 0;
}

static const struct i2c_device_id vpx3220_id[] = {
	{ "vpx3220a", 0 },
	{ "vpx3216b", 0 },
	{ "vpx3214c", 0 },
	{ }
};
MODULE_DEVICE_TABLE(i2c, vpx3220_id);

static struct v4l2_i2c_driver_data v4l2_i2c_data = {
	.name = "vpx3220",
	.driverid = I2C_DRIVERID_VPX3220,
	.command = vpx3220_command,
	.probe = vpx3220_probe,
	.remove = vpx3220_remove,
	.id_table = vpx3220_id,
};