aboutsummaryrefslogtreecommitdiff
path: root/drivers/media/video/vpx3220.c
blob: 2f67b4c5c823bf396a4a2d17ebdabde113eafe6f (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
/*
 * 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 <linux/slab.h>
#include <asm/uaccess.h>
#include <linux/i2c.h>
#include <linux/videodev2.h>
#include <media/v4l2-device.h>
#include <media/v4l2-chip-ident.h>
#include <media/v4l2-ctrls.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 {
	struct v4l2_subdev sd;
	struct v4l2_ctrl_handler hdl;
	unsigned char reg[255];

	v4l2_std_id norm;
	int ident;
	int input;
	int enable;
};

static inline struct vpx3220 *to_vpx3220(struct v4l2_subdev *sd)
{
	return container_of(sd, struct vpx3220, sd);
}

static inline struct v4l2_subdev *to_sd(struct v4l2_ctrl *ctrl)
{
	return &container_of(ctrl->handler, struct vpx3220, hdl)->sd;
}

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

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

static inline int vpx3220_write(struct v4l2_subdev *sd, u8 reg, u8 value)
{
	struct i2c_client *client = v4l2_get_subdevdata(sd);
	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 v4l2_subdev *sd, u8 reg)
{
	struct i2c_client *client = v4l2_get_subdevdata(sd);

	return i2c_smbus_read_byte_data(client, reg);
}

static int vpx3220_fp_status(struct v4l2_subdev *sd)
{
	unsigned char status;
	unsigned int i;

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

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

		udelay(10);

		if (need_resched())
			cond_resched();
	}

	return -1;
}

static int vpx3220_fp_write(struct v4l2_subdev *sd, u8 fpaddr, u16 data)
{
	struct i2c_client *client = v4l2_get_subdevdata(sd);

	/* Write the 16-bit address to the FPWR register */
	if (i2c_smbus_write_word_data(client, 0x27, swab16(fpaddr)) == -1) {
		v4l2_dbg(1, debug, sd, "%s: failed\n", __func__);
		return -1;
	}

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

	/* Write the 16-bit data to the FPDAT register */
	if (i2c_smbus_write_word_data(client, 0x28, swab16(data)) == -1) {
		v4l2_dbg(1, debug, sd, "%s: failed\n", __func__);
		return -1;
	}

	return 0;
}

static u16 vpx3220_fp_read(struct v4l2_subdev *sd, u16 fpaddr)
{
	struct i2c_client *client = v4l2_get_subdevdata(sd);
	s16 data;

	/* Write the 16-bit address to the FPRD register */
	if (i2c_smbus_write_word_data(client, 0x26, swab16(fpaddr)) == -1) {
		v4l2_dbg(1, debug, sd, "%s: failed\n", __func__);
		return -1;
	}

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

	/* Read the 16-bit data from the FPDAT register */
	data = i2c_smbus_read_word_data(client, 0x28);
	if (data == -1) {
		v4l2_dbg(1, debug, sd, "%s: failed\n", __func__);
		return -1;
	}

	return swab16(data);
}

static int vpx3220_write_block(struct v4l2_subdev *sd, const u8 *data, unsigned int len)
{
	u8 reg;
	int ret = -1;

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

	return ret;
}

static int vpx3220_write_fp_block(struct v4l2_subdev *sd,
		const u16 *data, unsigned int len)
{
	u8 reg;
	int ret = 0;

	while (len > 1) {
		reg = *data++;
		ret |= vpx3220_fp_write(sd, 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_init(struct v4l2_subdev *sd, u32 val)
{
	struct vpx3220 *decoder = to_vpx3220(sd);

	vpx3220_write_block(sd, init_common, sizeof(init_common));
	vpx3220_write_fp_block(sd, init_fp, sizeof(init_fp) >> 1);
	if (decoder->norm & V4L2_STD_NTSC)
		vpx3220_write_fp_block(sd, init_ntsc, sizeof(init_ntsc) >> 1);
	else if (decoder->norm & V4L2_STD_PAL)
		vpx3220_write_fp_block(sd, init_pal, sizeof(init_pal) >> 1);
	else if (decoder->norm & V4L2_STD_SECAM)
		vpx3220_write_fp_block(sd, init_secam, sizeof(init_secam) >> 1);
	else
		vpx3220_write_fp_block(sd, init_pal, sizeof(init_pal) >> 1);
	return 0;
}

static int vpx3220_status(struct v4l2_subdev *sd, u32 *pstatus, v4l2_std_id *pstd)
{
	int res = V4L2_IN_ST_NO_SIGNAL, status;
	v4l2_std_id std = 0;

	status = vpx3220_fp_read(sd, 0x0f3);

	v4l2_dbg(1, debug, sd, "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 (pstd)
		*pstd = std;
	if (pstatus)
		*pstatus = res;
	return 0;
}

static int vpx3220_querystd(struct v4l2_subdev *sd, v4l2_std_id *std)
{
	v4l2_dbg(1, debug, sd, "querystd\n");
	return vpx3220_status(sd, NULL, std);
}

static int vpx3220_g_input_status(struct v4l2_subdev *sd, u32 *status)
{
	v4l2_dbg(1, debug, sd, "g_input_status\n");
	return vpx3220_status(sd, status, NULL);
}

static int vpx3220_s_std(struct v4l2_subdev *sd, v4l2_std_id std)
{
	struct vpx3220 *decoder = to_vpx3220(sd);
	int temp_input;

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

	v4l2_dbg(1, debug, sd, "s_std %llx\n", (unsigned long long)std);
	if (std & V4L2_STD_NTSC) {
		vpx3220_write_fp_block(sd, init_ntsc, sizeof(init_ntsc) >> 1);
		v4l2_dbg(1, debug, sd, "norm switched to NTSC\n");
	} else if (std & V4L2_STD_PAL) {
		vpx3220_write_fp_block(sd, init_pal, sizeof(init_pal) >> 1);
		v4l2_dbg(1, debug, sd, "norm switched to PAL\n");
	} else if (std & V4L2_STD_SECAM) {
		vpx3220_write_fp_block(sd, init_secam, sizeof(init_secam) >> 1);
		v4l2_dbg(1, debug, sd, "norm switched to SECAM\n");
	} else {
		return -EINVAL;
	}

	decoder->norm = std;

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

static int vpx3220_s_routing(struct v4l2_subdev *sd,
			     u32 input, u32 output, u32 config)
{
	int data;

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

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

	if (input > 2)
		return -EINVAL;

	v4l2_dbg(1, debug, sd, "input switched to %s\n", inputs[input]);

	vpx3220_write(sd, 0x33, input_vals[input][0]);

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

	udelay(10);
	return 0;
}

static int vpx3220_s_stream(struct v4l2_subdev *sd, int enable)
{
	v4l2_dbg(1, debug, sd, "s_stream %s\n", enable ? "on" : "off");

	vpx3220_write(sd, 0xf2, (enable ? 0x1b : 0x00));
	return 0;
}

static int vpx3220_s_ctrl(struct v4l2_ctrl *ctrl)
{
	struct v4l2_subdev *sd = to_sd(ctrl);

	switch (ctrl->id) {
	case V4L2_CID_BRIGHTNESS:
		vpx3220_write(sd, 0xe6, ctrl->val);
		return 0;
	case V4L2_CID_CONTRAST:
		/* Bit 7 and 8 is for noise shaping */
		vpx3220_write(sd, 0xe7, ctrl->val + 192);
		return 0;
	case V4L2_CID_SATURATION:
		vpx3220_fp_write(sd, 0xa0, ctrl->val);
		return 0;
	case V4L2_CID_HUE:
		vpx3220_fp_write(sd, 0x1c, ctrl->val);
		return 0;
	}
	return -EINVAL;
}

static int vpx3220_g_chip_ident(struct v4l2_subdev *sd, struct v4l2_dbg_chip_ident *chip)
{
	struct vpx3220 *decoder = to_vpx3220(sd);
	struct i2c_client *client = v4l2_get_subdevdata(sd);

	return v4l2_chip_ident_i2c_client(client, chip, decoder->ident, 0);
}

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

static const struct v4l2_ctrl_ops vpx3220_ctrl_ops = {
	.s_ctrl = vpx3220_s_ctrl,
};

static const struct v4l2_subdev_core_ops vpx3220_core_ops = {
	.g_chip_ident = vpx3220_g_chip_ident,
	.init = vpx3220_init,
	.g_ext_ctrls = v4l2_subdev_g_ext_ctrls,
	.try_ext_ctrls = v4l2_subdev_try_ext_ctrls,
	.s_ext_ctrls = v4l2_subdev_s_ext_ctrls,
	.g_ctrl = v4l2_subdev_g_ctrl,
	.s_ctrl = v4l2_subdev_s_ctrl,
	.queryctrl = v4l2_subdev_queryctrl,
	.querymenu = v4l2_subdev_querymenu,
	.s_std = vpx3220_s_std,
};

static const struct v4l2_subdev_video_ops vpx3220_video_ops = {
	.s_routing = vpx3220_s_routing,
	.s_stream = vpx3220_s_stream,
	.querystd = vpx3220_querystd,
	.g_input_status = vpx3220_g_input_status,
};

static const struct v4l2_subdev_ops vpx3220_ops = {
	.core = &vpx3220_core_ops,
	.video = &vpx3220_video_ops,
};

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

static int vpx3220_probe(struct i2c_client *client,
			const struct i2c_device_id *id)
{
	struct vpx3220 *decoder;
	struct v4l2_subdev *sd;
	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;
	sd = &decoder->sd;
	v4l2_i2c_subdev_init(sd, client, &vpx3220_ops);
	decoder->norm = V4L2_STD_PAL;
	decoder->input = 0;
	decoder->enable = 1;
	v4l2_ctrl_handler_init(&decoder->hdl, 4);
	v4l2_ctrl_new_std(&decoder->hdl, &vpx3220_ctrl_ops,
		V4L2_CID_BRIGHTNESS, -128, 127, 1, 0);
	v4l2_ctrl_new_std(&decoder->hdl, &vpx3220_ctrl_ops,
		V4L2_CID_CONTRAST, 0, 63, 1, 32);
	v4l2_ctrl_new_std(&decoder->hdl, &vpx3220_ctrl_ops,
		V4L2_CID_SATURATION, 0, 4095, 1, 2048);
	v4l2_ctrl_new_std(&decoder->hdl, &vpx3220_ctrl_ops,
		V4L2_CID_HUE, -512, 511, 1, 0);
	sd->ctrl_handler = &decoder->hdl;
	if (decoder->hdl.error) {
		int err = decoder->hdl.error;

		v4l2_ctrl_handler_free(&decoder->hdl);
		kfree(decoder);
		return err;
	}
	v4l2_ctrl_handler_setup(&decoder->hdl);

	ver = i2c_smbus_read_byte_data(client, 0x00);
	pn = (i2c_smbus_read_byte_data(client, 0x02) << 8) +
		i2c_smbus_read_byte_data(client, 0x01);
	decoder->ident = V4L2_IDENT_VPX3220A;
	if (ver == 0xec) {
		switch (pn) {
		case 0x4680:
			name = "vpx3220a";
			break;
		case 0x4260:
			name = "vpx3216b";
			decoder->ident = V4L2_IDENT_VPX3216B;
			break;
		case 0x4280:
			name = "vpx3214c";
			decoder->ident = V4L2_IDENT_VPX3214C;
			break;
		}
	}
	if (name)
		v4l2_info(sd, "%s found @ 0x%x (%s)\n", name,
			client->addr << 1, client->adapter->name);
	else
		v4l2_info(sd, "chip (%02x:%04x) found @ 0x%x (%s)\n",
			ver, pn, client->addr << 1, client->adapter->name);

	vpx3220_write_block(sd, init_common, sizeof(init_common));
	vpx3220_write_fp_block(sd, init_fp, sizeof(init_fp) >> 1);
	/* Default to PAL */
	vpx3220_write_fp_block(sd, init_pal, sizeof(init_pal) >> 1);
	return 0;
}

static int vpx3220_remove(struct i2c_client *client)
{
	struct v4l2_subdev *sd = i2c_get_clientdata(client);
	struct vpx3220 *decoder = to_vpx3220(sd);

	v4l2_device_unregister_subdev(sd);
	v4l2_ctrl_handler_free(&decoder->hdl);
	kfree(decoder);
	return 0;
}

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

static struct i2c_driver vpx3220_driver = {
	.driver = {
		.owner	= THIS_MODULE,
		.name	= "vpx3220",
	},
	.probe		= vpx3220_probe,
	.remove		= vpx3220_remove,
	.id_table	= vpx3220_id,
};

module_i2c_driver(vpx3220_driver);