aboutsummaryrefslogblamecommitdiffstats
path: root/drivers/media/video/saa7111.c
blob: 8c06592b37ff125a0f50fba400a01e64115f7e26 (plain) (tree)
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











































                                                                          






















































































































































































































































































































































































































































                                                                              
 
                                              


                                                                                

                                          






















                                                                        
                                                                

                               


                                             

                                                                       
                                                              



                               






























































                                                                             
                   

                                  

                                    



















                                                   
/* 
 * saa7111 - Philips SAA7111A video decoder driver version 0.0.3
 *
 * Copyright (C) 1998 Dave Perks <dperks@ibm.net>
 *
 * Slight changes for video timing and attachment output by
 * Wolfgang Scherr <scherr@net4you.net>
 *
 * Changes by Ronald Bultje <rbultje@ronald.bitfreak.net>
 *    - moved over to linux>=2.4.x i2c protocol (1/1/2003)
 *
 * Changes by Michael Hunold <michael@mihu.de>
 *    - implemented DECODER_SET_GPIO, DECODER_INIT, DECODER_SET_VBI_BYPASS
 *
 * 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("Philips SAA7111 video decoder 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_decoder.h>

static int debug = 0;
module_param(debug, int, 0644);
MODULE_PARM_DESC(debug, "Debug level (0-1)");

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

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

struct saa7111 {
	unsigned char reg[32];

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

#define   I2C_SAA7111        0x48

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

static inline int
saa7111_write (struct i2c_client *client,
	       u8                 reg,
	       u8                 value)
{
	struct saa7111 *decoder = i2c_get_clientdata(client);

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

static int
saa7111_write_block (struct i2c_client *client,
		     const u8          *data,
		     unsigned int       len)
{
	int ret = -1;
	u8 reg;

	/* the saa7111 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 saa7111 *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 = saa7111_write(client, reg,
						 *data++)) < 0)
				break;
			len -= 2;
		}
	}

	return ret;
}

static int
saa7111_init_decoder (struct i2c_client *client,
	      struct video_decoder_init *init)
{
	return saa7111_write_block(client, init->data, init->len);
}

static inline int
saa7111_read (struct i2c_client *client,
	      u8                 reg)
{
	return i2c_smbus_read_byte_data(client, reg);
}

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

static const unsigned char saa7111_i2c_init[] = {
	0x00, 0x00,		/* 00 - ID byte */
	0x01, 0x00,		/* 01 - reserved */

	/*front end */
	0x02, 0xd0,		/* 02 - FUSE=3, GUDL=2, MODE=0 */
	0x03, 0x23,		/* 03 - HLNRS=0, VBSL=1, WPOFF=0,
				 * HOLDG=0, GAFIX=0, GAI1=256, GAI2=256 */
	0x04, 0x00,		/* 04 - GAI1=256 */
	0x05, 0x00,		/* 05 - GAI2=256 */

	/* decoder */
	0x06, 0xf3,		/* 06 - HSB at  13(50Hz) /  17(60Hz)
				 * pixels after end of last line */
	/*0x07, 0x13,     * 07 - HSS at 113(50Hz) / 117(60Hz) pixels
				 * after end of last line */
	0x07, 0xe8,		/* 07 - HSS seems to be needed to
				 * work with NTSC, too */
	0x08, 0xc8,		/* 08 - AUFD=1, FSEL=1, EXFIL=0,
				 * VTRC=1, HPLL=0, VNOI=0 */
	0x09, 0x01,		/* 09 - BYPS=0, PREF=0, BPSS=0,
				 * VBLB=0, UPTCV=0, APER=1 */
	0x0a, 0x80,		/* 0a - BRIG=128 */
	0x0b, 0x47,		/* 0b - CONT=1.109 */
	0x0c, 0x40,		/* 0c - SATN=1.0 */
	0x0d, 0x00,		/* 0d - HUE=0 */
	0x0e, 0x01,		/* 0e - CDTO=0, CSTD=0, DCCF=0,
				 * FCTC=0, CHBW=1 */
	0x0f, 0x00,		/* 0f - reserved */
	0x10, 0x48,		/* 10 - OFTS=1, HDEL=0, VRLN=1, YDEL=0 */
	0x11, 0x1c,		/* 11 - GPSW=0, CM99=0, FECO=0, COMPO=1,
				 * OEYC=1, OEHV=1, VIPB=0, COLO=0 */
	0x12, 0x00,		/* 12 - output control 2 */
	0x13, 0x00,		/* 13 - output control 3 */
	0x14, 0x00,		/* 14 - reserved */
	0x15, 0x00,		/* 15 - VBI */
	0x16, 0x00,		/* 16 - VBI */
	0x17, 0x00,		/* 17 - VBI */
};

static int
saa7111_command (struct i2c_client *client,
		 unsigned int       cmd,
		 void              *arg)
{
	struct saa7111 *decoder = i2c_get_clientdata(client);

	switch (cmd) {

	case 0:
	case DECODER_INIT:
	{
		struct video_decoder_init *init = arg;
		if (NULL != init)
			return saa7111_init_decoder(client, init);
		else {
			struct video_decoder_init vdi;
			vdi.data = saa7111_i2c_init;
			vdi.len = sizeof(saa7111_i2c_init);
			return saa7111_init_decoder(client, &vdi);
		}
	}

	case DECODER_DUMP:
	{
		int i;

		for (i = 0; i < 32; i += 16) {
			int j;

			printk(KERN_DEBUG "%s: %03x", I2C_NAME(client), i);
			for (j = 0; j < 16; ++j) {
				printk(" %02x",
				       saa7111_read(client, i + j));
			}
			printk("\n");
		}
	}
		break;

	case DECODER_GET_CAPABILITIES:
	{
		struct video_decoder_capability *cap = arg;

		cap->flags = VIDEO_DECODER_PAL |
			     VIDEO_DECODER_NTSC |
			     VIDEO_DECODER_SECAM |
			     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 = saa7111_read(client, 0x1f);
		dprintk(1, KERN_DEBUG "%s status: 0x%02x\n", I2C_NAME(client),
			status);
		res = 0;
		if ((status & (1 << 6)) == 0) {
			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;
		case VIDEO_MODE_SECAM:
			res |= DECODER_STATUS_SECAM;
			break;
		default:
		case VIDEO_MODE_AUTO:
			if ((status & (1 << 5)) != 0) {
				res |= DECODER_STATUS_NTSC;
			} else {
				res |= DECODER_STATUS_PAL;
			}
			break;
		}
		if ((status & (1 << 0)) != 0) {
			res |= DECODER_STATUS_COLOR;
		}
		*iarg = res;
	}
		break;

	case DECODER_SET_GPIO:
	{
		int *iarg = arg;
		if (0 != *iarg) {
			saa7111_write(client, 0x11,
				(decoder->reg[0x11] | 0x80));
		} else {
			saa7111_write(client, 0x11,
				(decoder->reg[0x11] & 0x7f));
		}
		break;
	}

	case DECODER_SET_VBI_BYPASS:
	{
		int *iarg = arg;
		if (0 != *iarg) {
			saa7111_write(client, 0x13,
				(decoder->reg[0x13] & 0xf0) | 0x0a);
		} else {
			saa7111_write(client, 0x13,
				(decoder->reg[0x13] & 0xf0));
		}
		break;
	}

	case DECODER_SET_NORM:
	{
		int *iarg = arg;

		switch (*iarg) {

		case VIDEO_MODE_NTSC:
			saa7111_write(client, 0x08,
				      (decoder->reg[0x08] & 0x3f) | 0x40);
			saa7111_write(client, 0x0e,
				      (decoder->reg[0x0e] & 0x8f));
			break;

		case VIDEO_MODE_PAL:
			saa7111_write(client, 0x08,
				      (decoder->reg[0x08] & 0x3f) | 0x00);
			saa7111_write(client, 0x0e,
				      (decoder->reg[0x0e] & 0x8f));
			break;

		case VIDEO_MODE_SECAM:
			saa7111_write(client, 0x08,
				      (decoder->reg[0x08] & 0x3f) | 0x00);
			saa7111_write(client, 0x0e,
				      (decoder->reg[0x0e] & 0x8f) | 0x50);
			break;

		case VIDEO_MODE_AUTO:
			saa7111_write(client, 0x08,
				      (decoder->reg[0x08] & 0x3f) | 0x80);
			saa7111_write(client, 0x0e,
				      (decoder->reg[0x0e] & 0x8f));
			break;

		default:
			return -EINVAL;

		}
		decoder->norm = *iarg;
	}
		break;

	case DECODER_SET_INPUT:
	{
		int *iarg = arg;

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

		if (decoder->input != *iarg) {
			decoder->input = *iarg;
			/* select mode */
			saa7111_write(client, 0x02,
				      (decoder->
				       reg[0x02] & 0xf8) | decoder->input);
			/* bypass chrominance trap for modes 4..7 */
			saa7111_write(client, 0x09,
				      (decoder->
				       reg[0x09] & 0x7f) | ((decoder->
							     input >
							     3) ? 0x80 :
							    0));
		}
	}
		break;

	case DECODER_SET_OUTPUT:
	{
		int *iarg = arg;

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

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

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

			/* RJ: If output should be disabled (for
			 * playing videos), we also need a open PLL.
			 * The input is set to 0 (where no input
			 * source is connected), although this
			 * is not necessary.
			 *
			 * If output should be enabled, we have to
			 * reverse the above.
			 */

			if (decoder->enable) {
				saa7111_write(client, 0x02,
					      (decoder->
					       reg[0x02] & 0xf8) |
					      decoder->input);
				saa7111_write(client, 0x08,
					      (decoder->reg[0x08] & 0xfb));
				saa7111_write(client, 0x11,
					      (decoder->
					       reg[0x11] & 0xf3) | 0x0c);
			} else {
				saa7111_write(client, 0x02,
					      (decoder->reg[0x02] & 0xf8));
				saa7111_write(client, 0x08,
					      (decoder->
					       reg[0x08] & 0xfb) | 0x04);
				saa7111_write(client, 0x11,
					      (decoder->reg[0x11] & 0xf3));
			}
		}
	}
		break;

	case DECODER_SET_PICTURE:
	{
		struct video_picture *pic = arg;

		if (decoder->bright != pic->brightness) {
			/* We want 0 to 255 we get 0-65535 */
			decoder->bright = pic->brightness;
			saa7111_write(client, 0x0a, decoder->bright >> 8);
		}
		if (decoder->contrast != pic->contrast) {
			/* We want 0 to 127 we get 0-65535 */
			decoder->contrast = pic->contrast;
			saa7111_write(client, 0x0b,
				      decoder->contrast >> 9);
		}
		if (decoder->sat != pic->colour) {
			/* We want 0 to 127 we get 0-65535 */
			decoder->sat = pic->colour;
			saa7111_write(client, 0x0c, decoder->sat >> 9);
		}
		if (decoder->hue != pic->hue) {
			/* We want -128 to 127 we get 0-65535 */
			decoder->hue = pic->hue;
			saa7111_write(client, 0x0d,
				      (decoder->hue - 32768) >> 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_SAA7111 >> 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_saa7111;

static int
saa7111_detect_client (struct i2c_adapter *adapter,
		       int                 address,
		       int                 kind)
{
	int i;
	struct i2c_client *client;
	struct saa7111 *decoder;
	struct video_decoder_init vdi;

	dprintk(1,
		KERN_INFO
		"saa7111.c: detecting saa7111 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 = kzalloc(sizeof(struct i2c_client), GFP_KERNEL);
	if (client == 0)
		return -ENOMEM;
	client->addr = address;
	client->adapter = adapter;
	client->driver = &i2c_driver_saa7111;
	strlcpy(I2C_NAME(client), "saa7111", sizeof(I2C_NAME(client)));

	decoder = kzalloc(sizeof(struct saa7111), GFP_KERNEL);
	if (decoder == NULL) {
		kfree(client);
		return -ENOMEM;
	}
	decoder->norm = VIDEO_MODE_NTSC;
	decoder->input = 0;
	decoder->enable = 1;
	decoder->bright = 32768;
	decoder->contrast = 32768;
	decoder->hue = 32768;
	decoder->sat = 32768;
	i2c_set_clientdata(client, decoder);

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

	vdi.data = saa7111_i2c_init;
	vdi.len = sizeof(saa7111_i2c_init);
	i = saa7111_init_decoder(client, &vdi);
	if (i < 0) {
		dprintk(1, KERN_ERR "%s_attach error: init status %d\n",
			I2C_NAME(client), i);
	} else {
		dprintk(1,
			KERN_INFO
			"%s_attach: chip version %x at address 0x%x\n",
			I2C_NAME(client), saa7111_read(client, 0x00) >> 4,
			client->addr << 1);
	}

	return 0;
}

static int
saa7111_attach_adapter (struct i2c_adapter *adapter)
{
	dprintk(1,
		KERN_INFO
		"saa7111.c: starting probe for adapter %s (0x%x)\n",
		I2C_NAME(adapter), adapter->id);
	return i2c_probe(adapter, &addr_data, &saa7111_detect_client);
}

static int
saa7111_detach_client (struct i2c_client *client)
{
	struct saa7111 *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_saa7111 = {
	.driver = {
		.name = "saa7111",
	},

	.id = I2C_DRIVERID_SAA7111A,

	.attach_adapter = saa7111_attach_adapter,
	.detach_client = saa7111_detach_client,
	.command = saa7111_command,
};

static int __init
saa7111_init (void)
{
	return i2c_add_driver(&i2c_driver_saa7111);
}

static void __exit
saa7111_exit (void)
{
	i2c_del_driver(&i2c_driver_saa7111);
}

module_init(saa7111_init);
module_exit(saa7111_exit);