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[XFRM]: skb_cow_data() does not set proper owner for new skbs.
[linux-2.6/verdex.git] / drivers / media / video / saa7111.c
blob0a873112ae23db9a0a82a69056a1f733eb32f015
1 /*
2 * saa7111 - Philips SAA7111A video decoder driver version 0.0.3
3 *
4 * Copyright (C) 1998 Dave Perks <dperks@ibm.net>
5 *
6 * Slight changes for video timing and attachment output by
7 * Wolfgang Scherr <scherr@net4you.net>
8 *
9 * Changes by Ronald Bultje <rbultje@ronald.bitfreak.net>
10 * - moved over to linux>=2.4.x i2c protocol (1/1/2003)
11 *
12 * Changes by Michael Hunold <michael@mihu.de>
13 * - implemented DECODER_SET_GPIO, DECODER_INIT, DECODER_SET_VBI_BYPASS
14 *
15 * This program is free software; you can redistribute it and/or modify
16 * it under the terms of the GNU General Public License as published by
17 * the Free Software Foundation; either version 2 of the License, or
18 * (at your option) any later version.
19 *
20 * This program is distributed in the hope that it will be useful,
21 * but WITHOUT ANY WARRANTY; without even the implied warranty of
22 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
23 * GNU General Public License for more details.
24 *
25 * You should have received a copy of the GNU General Public License
26 * along with this program; if not, write to the Free Software
27 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
28 */
29
30 #include <linux/module.h>
31 #include <linux/init.h>
32 #include <linux/delay.h>
33 #include <linux/errno.h>
34 #include <linux/fs.h>
35 #include <linux/kernel.h>
36 #include <linux/major.h>
37 #include <linux/slab.h>
38 #include <linux/mm.h>
39 #include <linux/pci.h>
40 #include <linux/signal.h>
41 #include <asm/io.h>
42 #include <asm/pgtable.h>
43 #include <asm/page.h>
44 #include <linux/sched.h>
45 #include <asm/segment.h>
46 #include <linux/types.h>
47
48 #include <linux/videodev.h>
49 #include <asm/uaccess.h>
50
51 MODULE_DESCRIPTION("Philips SAA7111 video decoder driver");
52 MODULE_AUTHOR("Dave Perks");
53 MODULE_LICENSE("GPL");
54
55 #include <linux/i2c.h>
56 #include <linux/i2c-dev.h>
57
58 #define I2C_NAME(s) (s)->name
59
60 #include <linux/video_decoder.h>
61
62 static int debug = 0;
63 module_param(debug, int, 0644);
64 MODULE_PARM_DESC(debug, "Debug level (0-1)");
65
66 #define dprintk(num, format, args...) \
67 do { \
68 if (debug >= num) \
69 printk(format, ##args); \
70 } while (0)
71
72 /* ----------------------------------------------------------------------- */
73
74 struct saa7111 {
75 unsigned char reg[32];
76
77 int norm;
78 int input;
79 int enable;
80 int bright;
81 int contrast;
82 int hue;
83 int sat;
84 };
85
86 #define I2C_SAA7111 0x48
87
88 /* ----------------------------------------------------------------------- */
89
90 static inline int
91 saa7111_write (struct i2c_client *client,
92 u8 reg,
93 u8 value)
94 {
95 struct saa7111 *decoder = i2c_get_clientdata(client);
96
97 decoder->reg[reg] = value;
98 return i2c_smbus_write_byte_data(client, reg, value);
99 }
100
101 static int
102 saa7111_write_block (struct i2c_client *client,
103 const u8 *data,
104 unsigned int len)
105 {
106 int ret = -1;
107 u8 reg;
108
109 /* the saa7111 has an autoincrement function, use it if
110 * the adapter understands raw I2C */
111 if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
112 /* do raw I2C, not smbus compatible */
113 struct saa7111 *decoder = i2c_get_clientdata(client);
114 struct i2c_msg msg;
115 u8 block_data[32];
116
117 msg.addr = client->addr;
118 msg.flags = 0;
119 while (len >= 2) {
120 msg.buf = (char *) block_data;
121 msg.len = 0;
122 block_data[msg.len++] = reg = data[0];
123 do {
124 block_data[msg.len++] =
125 decoder->reg[reg++] = data[1];
126 len -= 2;
127 data += 2;
128 } while (len >= 2 && data[0] == reg &&
129 msg.len < 32);
130 if ((ret = i2c_transfer(client->adapter,
131 &msg, 1)) < 0)
132 break;
133 }
134 } else {
135 /* do some slow I2C emulation kind of thing */
136 while (len >= 2) {
137 reg = *data++;
138 if ((ret = saa7111_write(client, reg,
139 *data++)) < 0)
140 break;
141 len -= 2;
142 }
143 }
144
145 return ret;
146 }
147
148 static int
149 saa7111_init_decoder (struct i2c_client *client,
150 struct video_decoder_init *init)
151 {
152 return saa7111_write_block(client, init->data, init->len);
153 }
154
155 static inline int
156 saa7111_read (struct i2c_client *client,
157 u8 reg)
158 {
159 return i2c_smbus_read_byte_data(client, reg);
160 }
161
162 /* ----------------------------------------------------------------------- */
163
164 static const unsigned char saa7111_i2c_init[] = {
165 0x00, 0x00, /* 00 - ID byte */
166 0x01, 0x00, /* 01 - reserved */
167
168 /*front end */
169 0x02, 0xd0, /* 02 - FUSE=3, GUDL=2, MODE=0 */
170 0x03, 0x23, /* 03 - HLNRS=0, VBSL=1, WPOFF=0,
171 * HOLDG=0, GAFIX=0, GAI1=256, GAI2=256 */
172 0x04, 0x00, /* 04 - GAI1=256 */
173 0x05, 0x00, /* 05 - GAI2=256 */
174
175 /* decoder */
176 0x06, 0xf3, /* 06 - HSB at 13(50Hz) / 17(60Hz)
177 * pixels after end of last line */
178 /*0x07, 0x13, * 07 - HSS at 113(50Hz) / 117(60Hz) pixels
179 * after end of last line */
180 0x07, 0xe8, /* 07 - HSS seems to be needed to
181 * work with NTSC, too */
182 0x08, 0xc8, /* 08 - AUFD=1, FSEL=1, EXFIL=0,
183 * VTRC=1, HPLL=0, VNOI=0 */
184 0x09, 0x01, /* 09 - BYPS=0, PREF=0, BPSS=0,
185 * VBLB=0, UPTCV=0, APER=1 */
186 0x0a, 0x80, /* 0a - BRIG=128 */
187 0x0b, 0x47, /* 0b - CONT=1.109 */
188 0x0c, 0x40, /* 0c - SATN=1.0 */
189 0x0d, 0x00, /* 0d - HUE=0 */
190 0x0e, 0x01, /* 0e - CDTO=0, CSTD=0, DCCF=0,
191 * FCTC=0, CHBW=1 */
192 0x0f, 0x00, /* 0f - reserved */
193 0x10, 0x48, /* 10 - OFTS=1, HDEL=0, VRLN=1, YDEL=0 */
194 0x11, 0x1c, /* 11 - GPSW=0, CM99=0, FECO=0, COMPO=1,
195 * OEYC=1, OEHV=1, VIPB=0, COLO=0 */
196 0x12, 0x00, /* 12 - output control 2 */
197 0x13, 0x00, /* 13 - output control 3 */
198 0x14, 0x00, /* 14 - reserved */
199 0x15, 0x00, /* 15 - VBI */
200 0x16, 0x00, /* 16 - VBI */
201 0x17, 0x00, /* 17 - VBI */
202 };
203
204 static int
205 saa7111_command (struct i2c_client *client,
206 unsigned int cmd,
207 void *arg)
208 {
209 struct saa7111 *decoder = i2c_get_clientdata(client);
210
211 switch (cmd) {
212
213 case 0:
214 case DECODER_INIT:
215 {
216 struct video_decoder_init *init = arg;
217 if (NULL != init)
218 return saa7111_init_decoder(client, init);
219 else {
220 struct video_decoder_init vdi;
221 vdi.data = saa7111_i2c_init;
222 vdi.len = sizeof(saa7111_i2c_init);
223 return saa7111_init_decoder(client, &vdi);
224 }
225 }
226
227 case DECODER_DUMP:
228 {
229 int i;
230
231 for (i = 0; i < 32; i += 16) {
232 int j;
233
234 printk(KERN_DEBUG "%s: %03x", I2C_NAME(client), i);
235 for (j = 0; j < 16; ++j) {
236 printk(" %02x",
237 saa7111_read(client, i + j));
238 }
239 printk("\n");
240 }
241 }
242 break;
243
244 case DECODER_GET_CAPABILITIES:
245 {
246 struct video_decoder_capability *cap = arg;
247
248 cap->flags = VIDEO_DECODER_PAL |
249 VIDEO_DECODER_NTSC |
250 VIDEO_DECODER_SECAM |
251 VIDEO_DECODER_AUTO |
252 VIDEO_DECODER_CCIR;
253 cap->inputs = 8;
254 cap->outputs = 1;
255 }
256 break;
257
258 case DECODER_GET_STATUS:
259 {
260 int *iarg = arg;
261 int status;
262 int res;
263
264 status = saa7111_read(client, 0x1f);
265 dprintk(1, KERN_DEBUG "%s status: 0x%02x\n", I2C_NAME(client),
266 status);
267 res = 0;
268 if ((status & (1 << 6)) == 0) {
269 res |= DECODER_STATUS_GOOD;
270 }
271 switch (decoder->norm) {
272 case VIDEO_MODE_NTSC:
273 res |= DECODER_STATUS_NTSC;
274 break;
275 case VIDEO_MODE_PAL:
276 res |= DECODER_STATUS_PAL;
277 break;
278 case VIDEO_MODE_SECAM:
279 res |= DECODER_STATUS_SECAM;
280 break;
281 default:
282 case VIDEO_MODE_AUTO:
283 if ((status & (1 << 5)) != 0) {
284 res |= DECODER_STATUS_NTSC;
285 } else {
286 res |= DECODER_STATUS_PAL;
287 }
288 break;
289 }
290 if ((status & (1 << 0)) != 0) {
291 res |= DECODER_STATUS_COLOR;
292 }
293 *iarg = res;
294 }
295 break;
296
297 case DECODER_SET_GPIO:
298 {
299 int *iarg = arg;
300 if (0 != *iarg) {
301 saa7111_write(client, 0x11,
302 (decoder->reg[0x11] | 0x80));
303 } else {
304 saa7111_write(client, 0x11,
305 (decoder->reg[0x11] & 0x7f));
306 }
307 break;
308 }
309
310 case DECODER_SET_VBI_BYPASS:
311 {
312 int *iarg = arg;
313 if (0 != *iarg) {
314 saa7111_write(client, 0x13,
315 (decoder->reg[0x13] & 0xf0) | 0x0a);
316 } else {
317 saa7111_write(client, 0x13,
318 (decoder->reg[0x13] & 0xf0));
319 }
320 break;
321 }
322
323 case DECODER_SET_NORM:
324 {
325 int *iarg = arg;
326
327 switch (*iarg) {
328
329 case VIDEO_MODE_NTSC:
330 saa7111_write(client, 0x08,
331 (decoder->reg[0x08] & 0x3f) | 0x40);
332 saa7111_write(client, 0x0e,
333 (decoder->reg[0x0e] & 0x8f));
334 break;
335
336 case VIDEO_MODE_PAL:
337 saa7111_write(client, 0x08,
338 (decoder->reg[0x08] & 0x3f) | 0x00);
339 saa7111_write(client, 0x0e,
340 (decoder->reg[0x0e] & 0x8f));
341 break;
342
343 case VIDEO_MODE_SECAM:
344 saa7111_write(client, 0x08,
345 (decoder->reg[0x08] & 0x3f) | 0x00);
346 saa7111_write(client, 0x0e,
347 (decoder->reg[0x0e] & 0x8f) | 0x50);
348 break;
349
350 case VIDEO_MODE_AUTO:
351 saa7111_write(client, 0x08,
352 (decoder->reg[0x08] & 0x3f) | 0x80);
353 saa7111_write(client, 0x0e,
354 (decoder->reg[0x0e] & 0x8f));
355 break;
356
357 default:
358 return -EINVAL;
359
360 }
361 decoder->norm = *iarg;
362 }
363 break;
364
365 case DECODER_SET_INPUT:
366 {
367 int *iarg = arg;
368
369 if (*iarg < 0 || *iarg > 7) {
370 return -EINVAL;
371 }
372
373 if (decoder->input != *iarg) {
374 decoder->input = *iarg;
375 /* select mode */
376 saa7111_write(client, 0x02,
377 (decoder->
378 reg[0x02] & 0xf8) | decoder->input);
379 /* bypass chrominance trap for modes 4..7 */
380 saa7111_write(client, 0x09,
381 (decoder->
382 reg[0x09] & 0x7f) | ((decoder->
383 input >
384 3) ? 0x80 :
385 0));
386 }
387 }
388 break;
389
390 case DECODER_SET_OUTPUT:
391 {
392 int *iarg = arg;
393
394 /* not much choice of outputs */
395 if (*iarg != 0) {
396 return -EINVAL;
397 }
398 }
399 break;
400
401 case DECODER_ENABLE_OUTPUT:
402 {
403 int *iarg = arg;
404 int enable = (*iarg != 0);
405
406 if (decoder->enable != enable) {
407 decoder->enable = enable;
408
409 /* RJ: If output should be disabled (for
410 * playing videos), we also need a open PLL.
411 * The input is set to 0 (where no input
412 * source is connected), although this
413 * is not necessary.
414 *
415 * If output should be enabled, we have to
416 * reverse the above.
417 */
418
419 if (decoder->enable) {
420 saa7111_write(client, 0x02,
421 (decoder->
422 reg[0x02] & 0xf8) |
423 decoder->input);
424 saa7111_write(client, 0x08,
425 (decoder->reg[0x08] & 0xfb));
426 saa7111_write(client, 0x11,
427 (decoder->
428 reg[0x11] & 0xf3) | 0x0c);
429 } else {
430 saa7111_write(client, 0x02,
431 (decoder->reg[0x02] & 0xf8));
432 saa7111_write(client, 0x08,
433 (decoder->
434 reg[0x08] & 0xfb) | 0x04);
435 saa7111_write(client, 0x11,
436 (decoder->reg[0x11] & 0xf3));
437 }
438 }
439 }
440 break;
441
442 case DECODER_SET_PICTURE:
443 {
444 struct video_picture *pic = arg;
445
446 if (decoder->bright != pic->brightness) {
447 /* We want 0 to 255 we get 0-65535 */
448 decoder->bright = pic->brightness;
449 saa7111_write(client, 0x0a, decoder->bright >> 8);
450 }
451 if (decoder->contrast != pic->contrast) {
452 /* We want 0 to 127 we get 0-65535 */
453 decoder->contrast = pic->contrast;
454 saa7111_write(client, 0x0b,
455 decoder->contrast >> 9);
456 }
457 if (decoder->sat != pic->colour) {
458 /* We want 0 to 127 we get 0-65535 */
459 decoder->sat = pic->colour;
460 saa7111_write(client, 0x0c, decoder->sat >> 9);
461 }
462 if (decoder->hue != pic->hue) {
463 /* We want -128 to 127 we get 0-65535 */
464 decoder->hue = pic->hue;
465 saa7111_write(client, 0x0d,
466 (decoder->hue - 32768) >> 8);
467 }
468 }
469 break;
470
471 default:
472 return -EINVAL;
473 }
474
475 return 0;
476 }
477
478 /* ----------------------------------------------------------------------- */
479
480 /*
481 * Generic i2c probe
482 * concerning the addresses: i2c wants 7 bit (without the r/w bit), so '>>1'
483 */
484 static unsigned short normal_i2c[] = { I2C_SAA7111 >> 1, I2C_CLIENT_END };
485 static unsigned short normal_i2c_range[] = { I2C_CLIENT_END };
486
487 static unsigned short probe[2] = { I2C_CLIENT_END, I2C_CLIENT_END };
488 static unsigned short probe_range[2] = { I2C_CLIENT_END, I2C_CLIENT_END };
489 static unsigned short ignore[2] = { I2C_CLIENT_END, I2C_CLIENT_END };
490 static unsigned short ignore_range[2] = { I2C_CLIENT_END, I2C_CLIENT_END };
491 static unsigned short force[2] = { I2C_CLIENT_END , I2C_CLIENT_END };
492
493 static struct i2c_client_address_data addr_data = {
494 .normal_i2c = normal_i2c,
495 .normal_i2c_range = normal_i2c_range,
496 .probe = probe,
497 .probe_range = probe_range,
498 .ignore = ignore,
499 .ignore_range = ignore_range,
500 .force = force
501 };
502
503 static struct i2c_driver i2c_driver_saa7111;
504
505 static int
506 saa7111_detect_client (struct i2c_adapter *adapter,
507 int address,
508 int kind)
509 {
510 int i;
511 struct i2c_client *client;
512 struct saa7111 *decoder;
513 struct video_decoder_init vdi;
514
515 dprintk(1,
516 KERN_INFO
517 "saa7111.c: detecting saa7111 client on address 0x%x\n",
518 address << 1);
519
520 /* Check if the adapter supports the needed features */
521 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
522 return 0;
523
524 client = kmalloc(sizeof(struct i2c_client), GFP_KERNEL);
525 if (client == 0)
526 return -ENOMEM;
527 memset(client, 0, sizeof(struct i2c_client));
528 client->addr = address;
529 client->adapter = adapter;
530 client->driver = &i2c_driver_saa7111;
531 client->flags = I2C_CLIENT_ALLOW_USE;
532 strlcpy(I2C_NAME(client), "saa7111", sizeof(I2C_NAME(client)));
533
534 decoder = kmalloc(sizeof(struct saa7111), GFP_KERNEL);
535 if (decoder == NULL) {
536 kfree(client);
537 return -ENOMEM;
538 }
539 memset(decoder, 0, sizeof(struct saa7111));
540 decoder->norm = VIDEO_MODE_NTSC;
541 decoder->input = 0;
542 decoder->enable = 1;
543 decoder->bright = 32768;
544 decoder->contrast = 32768;
545 decoder->hue = 32768;
546 decoder->sat = 32768;
547 i2c_set_clientdata(client, decoder);
548
549 i = i2c_attach_client(client);
550 if (i) {
551 kfree(client);
552 kfree(decoder);
553 return i;
554 }
555
556 vdi.data = saa7111_i2c_init;
557 vdi.len = sizeof(saa7111_i2c_init);
558 i = saa7111_init_decoder(client, &vdi);
559 if (i < 0) {
560 dprintk(1, KERN_ERR "%s_attach error: init status %d\n",
561 I2C_NAME(client), i);
562 } else {
563 dprintk(1,
564 KERN_INFO
565 "%s_attach: chip version %x at address 0x%x\n",
566 I2C_NAME(client), saa7111_read(client, 0x00) >> 4,
567 client->addr << 1);
568 }
569
570 return 0;
571 }
572
573 static int
574 saa7111_attach_adapter (struct i2c_adapter *adapter)
575 {
576 dprintk(1,
577 KERN_INFO
578 "saa7111.c: starting probe for adapter %s (0x%x)\n",
579 I2C_NAME(adapter), adapter->id);
580 return i2c_probe(adapter, &addr_data, &saa7111_detect_client);
581 }
582
583 static int
584 saa7111_detach_client (struct i2c_client *client)
585 {
586 struct saa7111 *decoder = i2c_get_clientdata(client);
587 int err;
588
589 err = i2c_detach_client(client);
590 if (err) {
591 return err;
592 }
593
594 kfree(decoder);
595 kfree(client);
596
597 return 0;
598 }
599
600 /* ----------------------------------------------------------------------- */
601
602 static struct i2c_driver i2c_driver_saa7111 = {
603 .owner = THIS_MODULE,
604 .name = "saa7111",
605
606 .id = I2C_DRIVERID_SAA7111A,
607 .flags = I2C_DF_NOTIFY,
608
609 .attach_adapter = saa7111_attach_adapter,
610 .detach_client = saa7111_detach_client,
611 .command = saa7111_command,
612 };
613
614 static int __init
615 saa7111_init (void)
616 {
617 return i2c_add_driver(&i2c_driver_saa7111);
618 }
619
620 static void __exit
621 saa7111_exit (void)
622 {
623 i2c_del_driver(&i2c_driver_saa7111);
624 }
625
626 module_init(saa7111_init);
627 module_exit(saa7111_exit);
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