?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
[XFRM]: skb_cow_data() does not set proper owner for new skbs.
[linux-2.6/verdex.git] / drivers / media / video / vpx3220.c
blob0fd6c9a709179b845c59730e9e5d399daf8e0f19
1 /*
2 * vpx3220a, vpx3216b & vpx3214c video decoder driver version 0.0.1
3 *
4 * Copyright (C) 2001 Laurent Pinchart <lpinchart@freegates.be>
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
19 */
20
21 #include <linux/module.h>
22 #include <linux/init.h>
23 #include <linux/delay.h>
24 #include <linux/types.h>
25 #include <linux/slab.h>
26
27 #include <linux/byteorder/swab.h>
28
29 #include <asm/io.h>
30 #include <asm/uaccess.h>
31
32 #include <linux/i2c.h>
33 #include <linux/i2c-dev.h>
34
35 #define I2C_NAME(x) (x)->name
36
37 #include <linux/videodev.h>
38 #include <linux/video_decoder.h>
39
40 #define I2C_VPX3220 0x86
41 #define VPX3220_DEBUG KERN_DEBUG "vpx3220: "
42
43 static int debug = 0;
44 module_param(debug, int, 0);
45 MODULE_PARM_DESC(debug, "Debug level (0-1)");
46
47 #define dprintk(num, format, args...) \
48 do { \
49 if (debug >= num) \
50 printk(format, ##args); \
51 } while (0)
52
53 #define VPX_TIMEOUT_COUNT 10
54
55 /* ----------------------------------------------------------------------- */
56
57 struct vpx3220 {
58 unsigned char reg[255];
59
60 int norm;
61 int input;
62 int enable;
63 int bright;
64 int contrast;
65 int hue;
66 int sat;
67 };
68
69 static char *inputs[] = { "internal", "composite", "svideo" };
70
71 /* ----------------------------------------------------------------------- */
72 static inline int
73 vpx3220_write (struct i2c_client *client,
74 u8 reg,
75 u8 value)
76 {
77 struct vpx3220 *decoder = i2c_get_clientdata(client);
78
79 decoder->reg[reg] = value;
80 return i2c_smbus_write_byte_data(client, reg, value);
81 }
82
83 static inline int
84 vpx3220_read (struct i2c_client *client,
85 u8 reg)
86 {
87 return i2c_smbus_read_byte_data(client, reg);
88 }
89
90 static int
91 vpx3220_fp_status (struct i2c_client *client)
92 {
93 unsigned char status;
94 unsigned int i;
95
96 for (i = 0; i < VPX_TIMEOUT_COUNT; i++) {
97 status = vpx3220_read(client, 0x29);
98
99 if (!(status & 4))
100 return 0;
101
102 udelay(10);
103
104 if (need_resched())
105 cond_resched();
106 }
107
108 return -1;
109 }
110
111 static int
112 vpx3220_fp_write (struct i2c_client *client,
113 u8 fpaddr,
114 u16 data)
115 {
116 /* Write the 16-bit address to the FPWR register */
117 if (i2c_smbus_write_word_data(client, 0x27, swab16(fpaddr)) == -1) {
118 dprintk(1, VPX3220_DEBUG "%s: failed\n", __func__);
119 return -1;
120 }
121
122 if (vpx3220_fp_status(client) < 0)
123 return -1;
124
125 /* Write the 16-bit data to the FPDAT register */
126 if (i2c_smbus_write_word_data(client, 0x28, swab16(data)) == -1) {
127 dprintk(1, VPX3220_DEBUG "%s: failed\n", __func__);
128 return -1;
129 }
130
131 return 0;
132 }
133
134 static u16
135 vpx3220_fp_read (struct i2c_client *client,
136 u16 fpaddr)
137 {
138 s16 data;
139
140 /* Write the 16-bit address to the FPRD register */
141 if (i2c_smbus_write_word_data(client, 0x26, swab16(fpaddr)) == -1) {
142 dprintk(1, VPX3220_DEBUG "%s: failed\n", __func__);
143 return -1;
144 }
145
146 if (vpx3220_fp_status(client) < 0)
147 return -1;
148
149 /* Read the 16-bit data from the FPDAT register */
150 data = i2c_smbus_read_word_data(client, 0x28);
151 if (data == -1) {
152 dprintk(1, VPX3220_DEBUG "%s: failed\n", __func__);
153 return -1;
154 }
155
156 return swab16(data);
157 }
158
159 static int
160 vpx3220_write_block (struct i2c_client *client,
161 const u8 *data,
162 unsigned int len)
163 {
164 u8 reg;
165 int ret = -1;
166
167 while (len >= 2) {
168 reg = *data++;
169 if ((ret =
170 vpx3220_write(client, reg, *data++)) < 0)
171 break;
172 len -= 2;
173 }
174
175 return ret;
176 }
177
178 static int
179 vpx3220_write_fp_block (struct i2c_client *client,
180 const u16 *data,
181 unsigned int len)
182 {
183 u8 reg;
184 int ret = 0;
185
186 while (len > 1) {
187 reg = *data++;
188 ret |= vpx3220_fp_write(client, reg, *data++);
189 len -= 2;
190 }
191
192 return ret;
193 }
194
195 /* ---------------------------------------------------------------------- */
196
197 static const unsigned short init_ntsc[] = {
198 0x1c, 0x00, /* NTSC tint angle */
199 0x88, 17, /* Window 1 vertical */
200 0x89, 240, /* Vertical lines in */
201 0x8a, 240, /* Vertical lines out */
202 0x8b, 000, /* Horizontal begin */
203 0x8c, 640, /* Horizontal length */
204 0x8d, 640, /* Number of pixels */
205 0x8f, 0xc00, /* Disable window 2 */
206 0xf0, 0x173, /* 13.5 MHz transport, Forced
207 * mode, latch windows */
208 0xf2, 0x13, /* NTSC M, composite input */
209 0xe7, 0x1e1, /* Enable vertical standard
210 * locking @ 240 lines */
211 };
212
213 static const unsigned short init_pal[] = {
214 0x88, 23, /* Window 1 vertical begin */
215 0x89, 288 + 16, /* Vertical lines in (16 lines
216 * skipped by the VFE) */
217 0x8a, 288 + 16, /* Vertical lines out (16 lines
218 * skipped by the VFE) */
219 0x8b, 16, /* Horizontal begin */
220 0x8c, 768, /* Horizontal length */
221 0x8d, 784, /* Number of pixels
222 * Must be >= Horizontal begin + Horizontal length */
223 0x8f, 0xc00, /* Disable window 2 */
224 0xf0, 0x177, /* 13.5 MHz transport, Forced
225 * mode, latch windows */
226 0xf2, 0x3d1, /* PAL B,G,H,I, composite input */
227 0xe7, 0x261, /* PAL/SECAM set to 288 + 16 lines
228 * change to 0x241 for 288 lines */
229 };
230
231 static const unsigned short init_secam[] = {
232 0x88, 23 - 16, /* Window 1 vertical begin */
233 0x89, 288 + 16, /* Vertical lines in (16 lines
234 * skipped by the VFE) */
235 0x8a, 288 + 16, /* Vertical lines out (16 lines
236 * skipped by the VFE) */
237 0x8b, 16, /* Horizontal begin */
238 0x8c, 768, /* Horizontal length */
239 0x8d, 784, /* Number of pixels
240 * Must be >= Horizontal begin + Horizontal length */
241 0x8f, 0xc00, /* Disable window 2 */
242 0xf0, 0x177, /* 13.5 MHz transport, Forced
243 * mode, latch windows */
244 0xf2, 0x3d5, /* SECAM, composite input */
245 0xe7, 0x261, /* PAL/SECAM set to 288 + 16 lines
246 * change to 0x241 for 288 lines */
247 };
248
249 static const unsigned char init_common[] = {
250 0xf2, 0x00, /* Disable all outputs */
251 0x33, 0x0d, /* Luma : VIN2, Chroma : CIN
252 * (clamp off) */
253 0xd8, 0xa8, /* HREF/VREF active high, VREF
254 * pulse = 2, Odd/Even flag */
255 0x20, 0x03, /* IF compensation 0dB/oct */
256 0xe0, 0xff, /* Open up all comparators */
257 0xe1, 0x00,
258 0xe2, 0x7f,
259 0xe3, 0x80,
260 0xe4, 0x7f,
261 0xe5, 0x80,
262 0xe6, 0x00, /* Brightness set to 0 */
263 0xe7, 0xe0, /* Contrast to 1.0, noise shaping
264 * 10 to 8 2-bit error diffusion */
265 0xe8, 0xf8, /* YUV422, CbCr binary offset,
266 * ... (p.32) */
267 0xea, 0x18, /* LLC2 connected, output FIFO
268 * reset with VACTintern */
269 0xf0, 0x8a, /* Half full level to 10, bus
270 * shuffler [7:0, 23:16, 15:8] */
271 0xf1, 0x18, /* Single clock, sync mode, no
272 * FE delay, no HLEN counter */
273 0xf8, 0x12, /* Port A, PIXCLK, HF# & FE#
274 * strength to 2 */
275 0xf9, 0x24, /* Port B, HREF, VREF, PREF &
276 * ALPHA strength to 4 */
277 };
278
279 static const unsigned short init_fp[] = {
280 0x59, 0,
281 0xa0, 2070, /* ACC reference */
282 0xa3, 0,
283 0xa4, 0,
284 0xa8, 30,
285 0xb2, 768,
286 0xbe, 27,
287 0x58, 0,
288 0x26, 0,
289 0x4b, 0x298, /* PLL gain */
290 };
291
292 static void
293 vpx3220_dump_i2c (struct i2c_client *client)
294 {
295 int len = sizeof(init_common);
296 const unsigned char *data = init_common;
297
298 while (len > 1) {
299 dprintk(1,
300 KERN_DEBUG "vpx3216b i2c reg 0x%02x data 0x%02x\n",
301 *data, vpx3220_read(client, *data));
302 data += 2;
303 len -= 2;
304 }
305 }
306
307 static int
308 vpx3220_command (struct i2c_client *client,
309 unsigned int cmd,
310 void *arg)
311 {
312 struct vpx3220 *decoder = i2c_get_clientdata(client);
313
314 switch (cmd) {
315 case 0:
316 {
317 vpx3220_write_block(client, init_common,
318 sizeof(init_common));
319 vpx3220_write_fp_block(client, init_fp,
320 sizeof(init_fp) >> 1);
321 switch (decoder->norm) {
322
323 case VIDEO_MODE_NTSC:
324 vpx3220_write_fp_block(client, init_ntsc,
325 sizeof(init_ntsc) >> 1);
326 break;
327
328 case VIDEO_MODE_PAL:
329 vpx3220_write_fp_block(client, init_pal,
330 sizeof(init_pal) >> 1);
331 break;
332 case VIDEO_MODE_SECAM:
333 vpx3220_write_fp_block(client, init_secam,
334 sizeof(init_secam) >> 1);
335 break;
336 default:
337 vpx3220_write_fp_block(client, init_pal,
338 sizeof(init_pal) >> 1);
339 break;
340 }
341 }
342 break;
343
344 case DECODER_DUMP:
345 {
346 vpx3220_dump_i2c(client);
347 }
348 break;
349
350 case DECODER_GET_CAPABILITIES:
351 {
352 struct video_decoder_capability *cap = arg;
353
354 dprintk(1, KERN_DEBUG "%s: DECODER_GET_CAPABILITIES\n",
355 I2C_NAME(client));
356
357 cap->flags = VIDEO_DECODER_PAL |
358 VIDEO_DECODER_NTSC |
359 VIDEO_DECODER_SECAM |
360 VIDEO_DECODER_AUTO |
361 VIDEO_DECODER_CCIR;
362 cap->inputs = 3;
363 cap->outputs = 1;
364 }
365 break;
366
367 case DECODER_GET_STATUS:
368 {
369 int res = 0, status;
370
371 dprintk(1, KERN_INFO "%s: DECODER_GET_STATUS\n",
372 I2C_NAME(client));
373
374 status = vpx3220_fp_read(client, 0x0f3);
375
376 dprintk(1, KERN_INFO "%s: status: 0x%04x\n", I2C_NAME(client),
377 status);
378
379 if (status < 0)
380 return status;
381
382 if ((status & 0x20) == 0) {
383 res |= DECODER_STATUS_GOOD | DECODER_STATUS_COLOR;
384
385 switch (status & 0x18) {
386
387 case 0x00:
388 case 0x10:
389 case 0x14:
390 case 0x18:
391 res |= DECODER_STATUS_PAL;
392 break;
393
394 case 0x08:
395 res |= DECODER_STATUS_SECAM;
396 break;
397
398 case 0x04:
399 case 0x0c:
400 case 0x1c:
401 res |= DECODER_STATUS_NTSC;
402 break;
403 }
404 }
405
406 *(int *) arg = res;
407 }
408 break;
409
410 case DECODER_SET_NORM:
411 {
412 int *iarg = arg, data;
413
414 dprintk(1, KERN_DEBUG "%s: DECODER_SET_NORM %d\n",
415 I2C_NAME(client), *iarg);
416 switch (*iarg) {
417
418 case VIDEO_MODE_NTSC:
419 vpx3220_write_fp_block(client, init_ntsc,
420 sizeof(init_ntsc) >> 1);
421 dprintk(1, KERN_INFO "%s: norm switched to NTSC\n",
422 I2C_NAME(client));
423 break;
424
425 case VIDEO_MODE_PAL:
426 vpx3220_write_fp_block(client, init_pal,
427 sizeof(init_pal) >> 1);
428 dprintk(1, KERN_INFO "%s: norm switched to PAL\n",
429 I2C_NAME(client));
430 break;
431
432 case VIDEO_MODE_SECAM:
433 vpx3220_write_fp_block(client, init_secam,
434 sizeof(init_secam) >> 1);
435 dprintk(1, KERN_INFO "%s: norm switched to SECAM\n",
436 I2C_NAME(client));
437 break;
438
439 case VIDEO_MODE_AUTO:
440 /* FIXME This is only preliminary support */
441 data = vpx3220_fp_read(client, 0xf2) & 0x20;
442 vpx3220_fp_write(client, 0xf2, 0x00c0 | data);
443 dprintk(1, KERN_INFO "%s: norm switched to Auto\n",
444 I2C_NAME(client));
445 break;
446
447 default:
448 return -EINVAL;
449
450 }
451 decoder->norm = *iarg;
452 }
453 break;
454
455 case DECODER_SET_INPUT:
456 {
457 int *iarg = arg, data;
458
459 /* RJ: *iarg = 0: ST8 (PCTV) input
460 *iarg = 1: COMPOSITE input
461 *iarg = 2: SVHS input */
462
463 const int input[3][2] = {
464 {0x0c, 0},
465 {0x0d, 0},
466 {0x0e, 1}
467 };
468
469 if (*iarg < 0 || *iarg > 2)
470 return -EINVAL;
471
472 dprintk(1, KERN_INFO "%s: input switched to %s\n",
473 I2C_NAME(client), inputs[*iarg]);
474
475 vpx3220_write(client, 0x33, input[*iarg][0]);
476
477 data = vpx3220_fp_read(client, 0xf2) & ~(0x0020);
478 if (data < 0)
479 return data;
480 /* 0x0010 is required to latch the setting */
481 vpx3220_fp_write(client, 0xf2,
482 data | (input[*iarg][1] << 5) | 0x0010);
483
484 udelay(10);
485 }
486 break;
487
488 case DECODER_SET_OUTPUT:
489 {
490 int *iarg = arg;
491
492 /* not much choice of outputs */
493 if (*iarg != 0) {
494 return -EINVAL;
495 }
496 }
497 break;
498
499 case DECODER_ENABLE_OUTPUT:
500 {
501 int *iarg = arg;
502
503 dprintk(1, KERN_DEBUG "%s: DECODER_ENABLE_OUTPUT %d\n",
504 I2C_NAME(client), *iarg);
505
506 vpx3220_write(client, 0xf2, (*iarg ? 0x1b : 0x00));
507 }
508 break;
509
510 case DECODER_SET_PICTURE:
511 {
512 struct video_picture *pic = arg;
513
514 if (decoder->bright != pic->brightness) {
515 /* We want -128 to 128 we get 0-65535 */
516 decoder->bright = pic->brightness;
517 vpx3220_write(client, 0xe6,
518 (decoder->bright - 32768) >> 8);
519 }
520 if (decoder->contrast != pic->contrast) {
521 /* We want 0 to 64 we get 0-65535 */
522 /* Bit 7 and 8 is for noise shaping */
523 decoder->contrast = pic->contrast;
524 vpx3220_write(client, 0xe7,
525 (decoder->contrast >> 10) + 192);
526 }
527 if (decoder->sat != pic->colour) {
528 /* We want 0 to 4096 we get 0-65535 */
529 decoder->sat = pic->colour;
530 vpx3220_fp_write(client, 0xa0,
531 decoder->sat >> 4);
532 }
533 if (decoder->hue != pic->hue) {
534 /* We want -512 to 512 we get 0-65535 */
535 decoder->hue = pic->hue;
536 vpx3220_fp_write(client, 0x1c,
537 ((decoder->hue - 32768) >> 6) & 0xFFF);
538 }
539 }
540 break;
541
542 default:
543 return -EINVAL;
544 }
545
546 return 0;
547 }
548
549 static int
550 vpx3220_init_client (struct i2c_client *client)
551 {
552 vpx3220_write_block(client, init_common, sizeof(init_common));
553 vpx3220_write_fp_block(client, init_fp, sizeof(init_fp) >> 1);
554 /* Default to PAL */
555 vpx3220_write_fp_block(client, init_pal, sizeof(init_pal) >> 1);
556
557 return 0;
558 }
559
560 /* -----------------------------------------------------------------------
561 * Client managment code
562 */
563
564 /*
565 * Generic i2c probe
566 * concerning the addresses: i2c wants 7 bit (without the r/w bit), so '>>1'
567 */
568 static unsigned short normal_i2c[] =
569 { I2C_VPX3220 >> 1, (I2C_VPX3220 >> 1) + 4,
570 I2C_CLIENT_END
571 };
572 static unsigned short normal_i2c_range[] = { I2C_CLIENT_END };
573
574 static unsigned short probe[2] = { I2C_CLIENT_END, I2C_CLIENT_END };
575 static unsigned short probe_range[2] = { I2C_CLIENT_END, I2C_CLIENT_END };
576 static unsigned short ignore[2] = { I2C_CLIENT_END, I2C_CLIENT_END };
577 static unsigned short ignore_range[2] = { I2C_CLIENT_END, I2C_CLIENT_END };
578 static unsigned short force[2] = { I2C_CLIENT_END , I2C_CLIENT_END };
579
580 static struct i2c_client_address_data addr_data = {
581 .normal_i2c = normal_i2c,
582 .normal_i2c_range = normal_i2c_range,
583 .probe = probe,
584 .probe_range = probe_range,
585 .ignore = ignore,
586 .ignore_range = ignore_range,
587 .force = force
588 };
589
590 static struct i2c_driver vpx3220_i2c_driver;
591
592 static int
593 vpx3220_detach_client (struct i2c_client *client)
594 {
595 struct vpx3220 *decoder = i2c_get_clientdata(client);
596 int err;
597
598 err = i2c_detach_client(client);
599 if (err) {
600 return err;
601 }
602
603 kfree(decoder);
604 kfree(client);
605
606 return 0;
607 }
608
609 static int
610 vpx3220_detect_client (struct i2c_adapter *adapter,
611 int address,
612 int kind)
613 {
614 int err;
615 struct i2c_client *client;
616 struct vpx3220 *decoder;
617
618 dprintk(1, VPX3220_DEBUG "%s\n", __func__);
619
620 /* Check if the adapter supports the needed features */
621 if (!i2c_check_functionality
622 (adapter, I2C_FUNC_SMBUS_BYTE_DATA | I2C_FUNC_SMBUS_WORD_DATA))
623 return 0;
624
625 client = kmalloc(sizeof(struct i2c_client), GFP_KERNEL);
626 if (client == NULL) {
627 return -ENOMEM;
628 }
629
630 memset(client, 0, sizeof(struct i2c_client));
631
632 client->addr = address;
633 client->adapter = adapter;
634 client->driver = &vpx3220_i2c_driver;
635 client->flags = I2C_CLIENT_ALLOW_USE;
636
637 /* Check for manufacture ID and part number */
638 if (kind < 0) {
639 u8 id;
640 u16 pn;
641
642 id = vpx3220_read(client, 0x00);
643 if (id != 0xec) {
644 dprintk(1,
645 KERN_INFO
646 "vpx3220_attach: Wrong manufacturer ID (0x%02x)\n",
647 id);
648 kfree(client);
649 return 0;
650 }
651
652 pn = (vpx3220_read(client, 0x02) << 8) +
653 vpx3220_read(client, 0x01);
654 switch (pn) {
655 case 0x4680:
656 strlcpy(I2C_NAME(client), "vpx3220a",
657 sizeof(I2C_NAME(client)));
658 break;
659 case 0x4260:
660 strlcpy(I2C_NAME(client), "vpx3216b",
661 sizeof(I2C_NAME(client)));
662 break;
663 case 0x4280:
664 strlcpy(I2C_NAME(client), "vpx3214c",
665 sizeof(I2C_NAME(client)));
666 break;
667 default:
668 dprintk(1,
669 KERN_INFO
670 "%s: Wrong part number (0x%04x)\n",
671 __func__, pn);
672 kfree(client);
673 return 0;
674 }
675 } else {
676 strlcpy(I2C_NAME(client), "forced vpx32xx",
677 sizeof(I2C_NAME(client)));
678 }
679
680 decoder = kmalloc(sizeof(struct vpx3220), GFP_KERNEL);
681 if (decoder == NULL) {
682 kfree(client);
683 return -ENOMEM;
684 }
685 memset(decoder, 0, sizeof(struct vpx3220));
686 decoder->norm = VIDEO_MODE_PAL;
687 decoder->input = 0;
688 decoder->enable = 1;
689 decoder->bright = 32768;
690 decoder->contrast = 32768;
691 decoder->hue = 32768;
692 decoder->sat = 32768;
693 i2c_set_clientdata(client, decoder);
694
695 err = i2c_attach_client(client);
696 if (err) {
697 kfree(client);
698 kfree(decoder);
699 return err;
700 }
701
702 dprintk(1, KERN_INFO "%s: vpx32xx client found at address 0x%02x\n",
703 I2C_NAME(client), client->addr << 1);
704
705 vpx3220_init_client(client);
706
707 return 0;
708 }
709
710 static int
711 vpx3220_attach_adapter (struct i2c_adapter *adapter)
712 {
713 int ret;
714
715 ret = i2c_probe(adapter, &addr_data, &vpx3220_detect_client);
716 dprintk(1, VPX3220_DEBUG "%s: i2c_probe returned %d\n",
717 __func__, ret);
718 return ret;
719 }
720
721 /* -----------------------------------------------------------------------
722 * Driver initialization and cleanup code
723 */
724
725 static struct i2c_driver vpx3220_i2c_driver = {
726 .owner = THIS_MODULE,
727 .name = "vpx3220",
728
729 .id = I2C_DRIVERID_VPX3220,
730 .flags = I2C_DF_NOTIFY,
731
732 .attach_adapter = vpx3220_attach_adapter,
733 .detach_client = vpx3220_detach_client,
734 .command = vpx3220_command,
735 };
736
737 static int __init
738 vpx3220_init (void)
739 {
740 return i2c_add_driver(&vpx3220_i2c_driver);
741 }
742
743 static void __exit
744 vpx3220_cleanup (void)
745 {
746 i2c_del_driver(&vpx3220_i2c_driver);
747 }
748
749 module_init(vpx3220_init);
750 module_exit(vpx3220_cleanup);
751
752 MODULE_DESCRIPTION("vpx3220a/vpx3216b/vpx3214c video encoder driver");
753 MODULE_AUTHOR("Laurent Pinchart");
754 MODULE_LICENSE("GPL");
Verdex Pro support