Linux Audio

Check our new training course

Embedded Linux Audio

Check our new training course
with Creative Commons CC-BY-SA
lecture materials

Bootlin logo

Elixir Cross Referencer

Loading...
  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
/* 
    saa7185 - Philips SAA7185B video encoder 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>
    
    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/wrapper.h>

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

#include <linux/i2c-old.h>

#include <linux/video_encoder.h>

#define DEBUG(x)		/* Debug driver */

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

struct saa7185 {
	struct i2c_bus *bus;
	int addr;
	unsigned char reg[128];

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

#define   I2C_SAA7185        0x88

#define I2C_DELAY   10

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

static int saa7185_read(struct saa7185 *dev)
{
	int ack;

	LOCK_I2C_BUS(dev->bus);

	i2c_start(dev->bus);
	i2c_sendbyte(dev->bus, dev->addr | 1, I2C_DELAY);
	ack = i2c_readbyte(dev->bus, 1);
	i2c_stop(dev->bus);
	UNLOCK_I2C_BUS(dev->bus);
	return ack;
}

static int saa7185_write(struct saa7185 *dev, unsigned char subaddr,
			 unsigned char data)
{
	int ack;

	DEBUG(printk
	      (KERN_DEBUG "SAA7185: %02x set to %02x\n", subaddr, data);
	    )
	    LOCK_I2C_BUS(dev->bus);

	i2c_start(dev->bus);
	i2c_sendbyte(dev->bus, dev->addr, I2C_DELAY);
	i2c_sendbyte(dev->bus, subaddr, I2C_DELAY);
	ack = i2c_sendbyte(dev->bus, data, I2C_DELAY);
	dev->reg[subaddr] = data;
	i2c_stop(dev->bus);
	UNLOCK_I2C_BUS(dev->bus);
	return ack;
}

static int saa7185_write_block(struct saa7185 *dev,
			       unsigned const char *data, unsigned int len)
{
	int ack = -1;
	unsigned subaddr;

	while (len > 1) {
		LOCK_I2C_BUS(dev->bus);
		i2c_start(dev->bus);
		i2c_sendbyte(dev->bus, dev->addr, I2C_DELAY);
		ack = i2c_sendbyte(dev->bus, (subaddr = *data++), I2C_DELAY);
		ack = i2c_sendbyte(dev->bus, (dev->reg[subaddr] = *data++), I2C_DELAY);
		len -= 2;
		while (len > 1 && *data == ++subaddr) {
			data++;
			ack = i2c_sendbyte(dev->bus, (dev->reg[subaddr] = *data++), I2C_DELAY);
			len -= 2;
		}
		i2c_stop(dev->bus);
		UNLOCK_I2C_BUS(dev->bus);
	}
	return ack;
}

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

static const unsigned char init_common[] = {
	0x3a, 0x0f,		/* CBENB=0, V656=0, VY2C=1, YUV2C=1, MY2C=1, MUV2C=1 */

	0x42, 0x6b,		/* OVLY0=107 */
	0x43, 0x00,		/* OVLU0=0     white */
	0x44, 0x00,		/* OVLV0=0   */
	0x45, 0x22,		/* OVLY1=34  */
	0x46, 0xac,		/* OVLU1=172   yellow */
	0x47, 0x0e,		/* OVLV1=14  */
	0x48, 0x03,		/* OVLY2=3   */
	0x49, 0x1d,		/* OVLU2=29    cyan */
	0x4a, 0xac,		/* OVLV2=172 */
	0x4b, 0xf0,		/* OVLY3=240 */
	0x4c, 0xc8,		/* OVLU3=200   green */
	0x4d, 0xb9,		/* OVLV3=185 */
	0x4e, 0xd4,		/* OVLY4=212 */
	0x4f, 0x38,		/* OVLU4=56    magenta */
	0x50, 0x47,		/* OVLV4=71  */
	0x51, 0xc1,		/* OVLY5=193 */
	0x52, 0xe3,		/* OVLU5=227   red */
	0x53, 0x54,		/* OVLV5=84  */
	0x54, 0xa3,		/* OVLY6=163 */
	0x55, 0x54,		/* OVLU6=84    blue */
	0x56, 0xf2,		/* OVLV6=242 */
	0x57, 0x90,		/* OVLY7=144 */
	0x58, 0x00,		/* OVLU7=0     black */
	0x59, 0x00,		/* OVLV7=0   */

	0x5a, 0x00,		/* CHPS=0    */
	0x5b, 0x76,		/* GAINU=118 */
	0x5c, 0xa5,		/* GAINV=165 */
	0x5d, 0x3c,		/* BLCKL=60  */
	0x5e, 0x3a,		/* BLNNL=58  */
	0x5f, 0x3a,		/* CCRS=0, BLNVB=58 */
	0x60, 0x00,		/* NULL      */

/* 0x61 - 0x66 set according to norm */

	0x67, 0x00,		/* 0 : caption 1st byte odd  field */
	0x68, 0x00,		/* 0 : caption 2nd byte odd  field */
	0x69, 0x00,		/* 0 : caption 1st byte even field */
	0x6a, 0x00,		/* 0 : caption 2nd byte even field */

	0x6b, 0x91,		/* MODIN=2, PCREF=0, SCCLN=17 */
	0x6c, 0x20,		/* SRCV1=0, TRCV2=1, ORCV1=0, PRCV1=0, CBLF=0, ORCV2=0, PRCV2=0 */
	0x6d, 0x00,		/* SRCM1=0, CCEN=0 */

	0x6e, 0x0e,		/* HTRIG=0x005, approx. centered, at least for PAL */
	0x6f, 0x00,		/* HTRIG upper bits */
	0x70, 0x20,		/* PHRES=0, SBLN=1, VTRIG=0 */

/* The following should not be needed */

	0x71, 0x15,		/* BMRQ=0x115 */
	0x72, 0x90,		/* EMRQ=0x690 */
	0x73, 0x61,		/* EMRQ=0x690, BMRQ=0x115 */
	0x74, 0x00,		/* NULL       */
	0x75, 0x00,		/* NULL       */
	0x76, 0x00,		/* NULL       */
	0x77, 0x15,		/* BRCV=0x115 */
	0x78, 0x90,		/* ERCV=0x690 */
	0x79, 0x61,		/* ERCV=0x690, BRCV=0x115 */

/* Field length controls */

	0x7a, 0x70,		/* FLC=0 */

/* The following should not be needed if SBLN = 1 */

	0x7b, 0x16,		/* FAL=22 */
	0x7c, 0x35,		/* LAL=244 */
	0x7d, 0x20,		/* LAL=244, FAL=22 */
};

static const unsigned char init_pal[] = {
	0x61, 0x1e,		/* FISE=0, PAL=1, SCBW=1, RTCE=1, YGS=1, INPI=0, DOWN=0 */
	0x62, 0xc8,		/* DECTYP=1, BSTA=72 */
	0x63, 0xcb,		/* FSC0 */
	0x64, 0x8a,		/* FSC1 */
	0x65, 0x09,		/* FSC2 */
	0x66, 0x2a,		/* FSC3 */
};

static const unsigned char init_ntsc[] = {
	0x61, 0x1d,		/* FISE=1, PAL=0, SCBW=1, RTCE=1, YGS=1, INPI=0, DOWN=0 */
	0x62, 0xe6,		/* DECTYP=1, BSTA=102 */
	0x63, 0x1f,		/* FSC0 */
	0x64, 0x7c,		/* FSC1 */
	0x65, 0xf0,		/* FSC2 */
	0x66, 0x21,		/* FSC3 */
};

static int saa7185_attach(struct i2c_device *device)
{
	int i;
	struct saa7185 *encoder;

	MOD_INC_USE_COUNT;
	
	device->data = encoder = kmalloc(sizeof(struct saa7185), GFP_KERNEL);
	if (encoder == NULL) {
		MOD_DEC_USE_COUNT;
		return -ENOMEM;
	}


	memset(encoder, 0, sizeof(struct saa7185));
	strcpy(device->name, "saa7185");
	encoder->bus = device->bus;
	encoder->addr = device->addr;
	encoder->norm = VIDEO_MODE_NTSC;
	encoder->enable = 1;

	i = saa7185_write_block(encoder, init_common, sizeof(init_common));
	if (i >= 0) {
		i = saa7185_write_block(encoder, init_ntsc,
					sizeof(init_ntsc));
	}
	if (i < 0) {
		printk(KERN_ERR "%s_attach: init error %d\n", device->name,
		       i);
	} else {
		printk(KERN_INFO "%s_attach: chip version %d\n",
		       device->name, saa7185_read(encoder) >> 5);
	}

	return 0;
}


static int saa7185_detach(struct i2c_device *device)
{
	struct saa7185 *encoder = device->data;
	saa7185_write(encoder, 0x61, (encoder->reg[0x61]) | 0x40);	/* SW: output off is active */
	//saa7185_write(encoder, 0x3a, (encoder->reg[0x3a]) | 0x80); /* SW: color bar */
	kfree(encoder);
	MOD_DEC_USE_COUNT;
	return 0;
}

static int saa7185_command(struct i2c_device *device, unsigned int cmd,
			   void *arg)
{
	struct saa7185 *encoder = device->data;

	switch (cmd) {

	case ENCODER_GET_CAPABILITIES:
		{
			struct video_encoder_capability *cap = arg;

			cap->flags
			    = VIDEO_ENCODER_PAL
			    | VIDEO_ENCODER_NTSC
			    | VIDEO_ENCODER_SECAM | VIDEO_ENCODER_CCIR;
			cap->inputs = 1;
			cap->outputs = 1;
		}
		break;

	case ENCODER_SET_NORM:
		{
			int *iarg = arg;

			switch (*iarg) {

			case VIDEO_MODE_NTSC:
				saa7185_write_block(encoder, init_ntsc,
						    sizeof(init_ntsc));
				break;

			case VIDEO_MODE_PAL:
				saa7185_write_block(encoder, init_pal,
						    sizeof(init_pal));
				break;

			case VIDEO_MODE_SECAM:
			default:
				return -EINVAL;

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

	case ENCODER_SET_INPUT:
		{
			int *iarg = arg;

			/* RJ: *iarg = 0: input is from SA7111
			   *iarg = 1: input is from ZR36060 */

			switch (*iarg) {

			case 0:
				/* Switch RTCE to 1 */
				saa7185_write(encoder, 0x61,
					      (encoder->
					       reg[0x61] & 0xf7) | 0x08);
				saa7185_write(encoder, 0x6e, 0x01);
				break;

			case 1:
				/* Switch RTCE to 0 */
				saa7185_write(encoder, 0x61,
					      (encoder->
					       reg[0x61] & 0xf7) | 0x00);
				/* SW: a slight sync problem... */
				saa7185_write(encoder, 0x6e, 0x00);
				break;

			default:
				return -EINVAL;

			}
		}
		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;
			saa7185_write(encoder, 0x61,
				      (encoder->
				       reg[0x61] & 0xbf) | (encoder->
							    enable ? 0x00 :
							    0x40));
		}
		break;

	default:
		return -EINVAL;
	}

	return 0;
}

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

static struct i2c_driver i2c_driver_saa7185 = {
	"saa7185",		/* name */
	I2C_DRIVERID_VIDEOENCODER,	/* ID */
	I2C_SAA7185, I2C_SAA7185 + 1,

	saa7185_attach,
	saa7185_detach,
	saa7185_command
};

EXPORT_NO_SYMBOLS;

static int saa7185_init(void)
{
	return i2c_register_driver(&i2c_driver_saa7185);
}

static void saa7185_exit(void)
{
	i2c_unregister_driver(&i2c_driver_saa7185);
}

module_init(saa7185_init);
module_exit(saa7185_exit);
MODULE_LICENSE("GPL");