137b58f2c666aae638c0199e95bfac15a5576149
[linux-2.6.git] / drivers / media / video / vpx3220.c
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, 0x73,             /* 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,              /* Vertical lines in (16 lines
216                                  * skipped by the VFE) */
217         0x8a, 288,              /* 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, 0x77,             /* 13.5 MHz transport, Forced
225                                  * mode, latch windows */
226         0xf2, 0x3d1,            /* PAL B,G,H,I, composite input */
227         0xe7, 0x241,            /* PAL/SECAM set to 288 lines */
228 };
229
230 static const unsigned short init_secam[] = {
231         0x88, 23,               /* Window 1 vertical begin */
232         0x89, 288,              /* Vertical lines in (16 lines
233                                  * skipped by the VFE) */
234         0x8a, 288,              /* Vertical lines out (16 lines
235                                  * skipped by the VFE) */
236         0x8b, 16,               /* Horizontal begin */
237         0x8c, 768,              /* Horizontal length */
238         0x8d, 784,              /* Number of pixels
239                                  * Must be >= Horizontal begin + Horizontal length */
240         0x8f, 0xc00,            /* Disable window 2 */
241         0xf0, 0x77,             /* 13.5 MHz transport, Forced
242                                  * mode, latch windows */
243         0xf2, 0x3d5,            /* SECAM, composite input */
244         0xe7, 0x241,            /* PAL/SECAM set to 288 lines */
245 };
246
247 static const unsigned char init_common[] = {
248         0xf2, 0x00,             /* Disable all outputs */
249         0x33, 0x0d,             /* Luma : VIN2, Chroma : CIN
250                                  * (clamp off) */
251         0xd8, 0xa8,             /* HREF/VREF active high, VREF
252                                  * pulse = 2, Odd/Even flag */
253         0x20, 0x03,             /* IF compensation 0dB/oct */
254         0xe0, 0xff,             /* Open up all comparators */
255         0xe1, 0x00,
256         0xe2, 0x7f,
257         0xe3, 0x80,
258         0xe4, 0x7f,
259         0xe5, 0x80,
260         0xe6, 0x00,             /* Brightness set to 0 */
261         0xe7, 0xe0,             /* Contrast to 1.0, noise shaping
262                                  * 10 to 8 2-bit error diffusion */
263         0xe8, 0xf8,             /* YUV422, CbCr binary offset,
264                                  * ... (p.32) */
265         0xea, 0x18,             /* LLC2 connected, output FIFO
266                                  * reset with VACTintern */
267         0xf0, 0x8a,             /* Half full level to 10, bus
268                                  * shuffler [7:0, 23:16, 15:8] */
269         0xf1, 0x18,             /* Single clock, sync mode, no
270                                  * FE delay, no HLEN counter */
271         0xf8, 0x12,             /* Port A, PIXCLK, HF# & FE#
272                                  * strength to 2 */
273         0xf9, 0x24,             /* Port B, HREF, VREF, PREF &
274                                  * ALPHA strength to 4 */
275 };
276
277 static const unsigned short init_fp[] = {
278         0x59, 0,
279         0xa0, 2070,             /* ACC reference */
280         0xa3, 0,
281         0xa4, 0,
282         0xa8, 30,
283         0xb2, 768,
284         0xbe, 27,
285         0x58, 0,
286         0x26, 0,
287         0x4b, 0x298,            /* PLL gain */
288 };
289
290 static void
291 vpx3220_dump_i2c (struct i2c_client *client)
292 {
293         int len = sizeof(init_common);
294         const unsigned char *data = init_common;
295
296         while (len > 1) {
297                 dprintk(1,
298                         KERN_DEBUG "vpx3216b i2c reg 0x%02x data 0x%02x\n",
299                         *data, vpx3220_read(client, *data));
300                 data += 2;
301                 len -= 2;
302         }
303 }
304
305 static int
306 vpx3220_command (struct i2c_client *client,
307                  unsigned int       cmd,
308                  void              *arg)
309 {
310         struct vpx3220 *decoder = i2c_get_clientdata(client);
311
312         switch (cmd) {
313         case 0:
314         {
315                 vpx3220_write_block(client, init_common,
316                                     sizeof(init_common));
317                 vpx3220_write_fp_block(client, init_fp,
318                                        sizeof(init_fp) >> 1);
319                 switch (decoder->norm) {
320                         
321                 case VIDEO_MODE_NTSC:
322                         vpx3220_write_fp_block(client, init_ntsc,
323                                                sizeof(init_ntsc) >> 1);
324                         break;
325
326                 case VIDEO_MODE_PAL:
327                         vpx3220_write_fp_block(client, init_pal,
328                                                sizeof(init_pal) >> 1);
329                         break;
330                 case VIDEO_MODE_SECAM:
331                         vpx3220_write_fp_block(client, init_secam,
332                                                sizeof(init_secam) >> 1);
333                         break;
334                 default:
335                         vpx3220_write_fp_block(client, init_pal,
336                                                sizeof(init_pal) >> 1);
337                         break;
338                 }
339         }               
340                 break;
341
342         case DECODER_DUMP:
343         {
344                 vpx3220_dump_i2c(client);
345         }
346                 break;
347
348         case DECODER_GET_CAPABILITIES:
349         {
350                 struct video_decoder_capability *cap = arg;
351
352                 dprintk(1, KERN_DEBUG "%s: DECODER_GET_CAPABILITIES\n",
353                         I2C_NAME(client));
354
355                 cap->flags = VIDEO_DECODER_PAL |
356                              VIDEO_DECODER_NTSC |
357                              VIDEO_DECODER_SECAM |
358                              VIDEO_DECODER_AUTO |
359                              VIDEO_DECODER_CCIR;
360                 cap->inputs = 3;
361                 cap->outputs = 1;
362         }
363                 break;
364
365         case DECODER_GET_STATUS:
366         {
367                 int res = 0, status;
368
369                 dprintk(1, KERN_INFO "%s: DECODER_GET_STATUS\n",
370                         I2C_NAME(client));
371
372                 status = vpx3220_fp_read(client, 0x0f3);
373
374                 dprintk(1, KERN_INFO "%s: status: 0x%04x\n", I2C_NAME(client),
375                         status);
376
377                 if (status < 0)
378                         return status;
379
380                 if ((status & 0x20) == 0) {
381                         res |= DECODER_STATUS_GOOD | DECODER_STATUS_COLOR;
382
383                         switch (status & 0x18) {
384
385                         case 0x00:
386                         case 0x10:
387                         case 0x14:
388                         case 0x18:
389                                 res |= DECODER_STATUS_PAL;
390                                 break;
391
392                         case 0x08:
393                                 res |= DECODER_STATUS_SECAM;
394                                 break;
395
396                         case 0x04:
397                         case 0x0c:
398                         case 0x1c:
399                                 res |= DECODER_STATUS_NTSC;
400                                 break;
401                         }
402                 }
403
404                 *(int *) arg = res;
405         }
406                 break;
407
408         case DECODER_SET_NORM:
409         {
410                 int *iarg = arg, data;
411                 int temp_input;
412
413                 /* Here we back up the input selection because it gets
414                    overwritten when we fill the registers with the
415                    choosen video norm */
416                 temp_input = vpx3220_fp_read(client, 0xf2);
417
418                 dprintk(1, KERN_DEBUG "%s: DECODER_SET_NORM %d\n",
419                         I2C_NAME(client), *iarg);
420                 switch (*iarg) {
421
422                 case VIDEO_MODE_NTSC:
423                         vpx3220_write_fp_block(client, init_ntsc,
424                                                sizeof(init_ntsc) >> 1);
425                         dprintk(1, KERN_INFO "%s: norm switched to NTSC\n",
426                                 I2C_NAME(client));
427                         break;
428
429                 case VIDEO_MODE_PAL:
430                         vpx3220_write_fp_block(client, init_pal,
431                                                sizeof(init_pal) >> 1);
432                         dprintk(1, KERN_INFO "%s: norm switched to PAL\n",
433                                 I2C_NAME(client));
434                         break;
435
436                 case VIDEO_MODE_SECAM:
437                         vpx3220_write_fp_block(client, init_secam,
438                                                sizeof(init_secam) >> 1);
439                         dprintk(1, KERN_INFO "%s: norm switched to SECAM\n",
440                                 I2C_NAME(client));
441                         break;
442
443                 case VIDEO_MODE_AUTO:
444                         /* FIXME This is only preliminary support */
445                         data = vpx3220_fp_read(client, 0xf2) & 0x20;
446                         vpx3220_fp_write(client, 0xf2, 0x00c0 | data);
447                         dprintk(1, KERN_INFO "%s: norm switched to Auto\n",
448                                 I2C_NAME(client));
449                         break;
450
451                 default:
452                         return -EINVAL;
453
454                 }
455                 decoder->norm = *iarg;
456
457                 /* And here we set the backed up video input again */
458                 vpx3220_fp_write(client, 0xf2, temp_input | 0x0010);
459                 udelay(10);
460         }
461                 break;
462
463         case DECODER_SET_INPUT:
464         {
465                 int *iarg = arg, data;
466
467                 /* RJ:  *iarg = 0: ST8 (PCTV) input
468                  *iarg = 1: COMPOSITE  input
469                  *iarg = 2: SVHS       input  */
470
471                 const int input[3][2] = {
472                         {0x0c, 0},
473                         {0x0d, 0},
474                         {0x0e, 1}
475                 };
476
477                 if (*iarg < 0 || *iarg > 2)
478                         return -EINVAL;
479
480                 dprintk(1, KERN_INFO "%s: input switched to %s\n",
481                         I2C_NAME(client), inputs[*iarg]);
482
483                 vpx3220_write(client, 0x33, input[*iarg][0]);
484
485                 data = vpx3220_fp_read(client, 0xf2) & ~(0x0020);
486                 if (data < 0)
487                         return data;
488                 /* 0x0010 is required to latch the setting */
489                 vpx3220_fp_write(client, 0xf2,
490                                  data | (input[*iarg][1] << 5) | 0x0010);
491
492                 udelay(10);
493         }
494                 break;
495
496         case DECODER_SET_OUTPUT:
497         {
498                 int *iarg = arg;
499
500                 /* not much choice of outputs */
501                 if (*iarg != 0) {
502                         return -EINVAL;
503                 }
504         }
505                 break;
506
507         case DECODER_ENABLE_OUTPUT:
508         {
509                 int *iarg = arg;
510
511                 dprintk(1, KERN_DEBUG "%s: DECODER_ENABLE_OUTPUT %d\n",
512                         I2C_NAME(client), *iarg);
513
514                 vpx3220_write(client, 0xf2, (*iarg ? 0x1b : 0x00));
515         }
516                 break;
517
518         case DECODER_SET_PICTURE:
519         {
520                 struct video_picture *pic = arg;
521
522                 if (decoder->bright != pic->brightness) {
523                         /* We want -128 to 128 we get 0-65535 */
524                         decoder->bright = pic->brightness;
525                         vpx3220_write(client, 0xe6,
526                                       (decoder->bright - 32768) >> 8);
527                 }
528                 if (decoder->contrast != pic->contrast) {
529                         /* We want 0 to 64 we get 0-65535 */
530                         /* Bit 7 and 8 is for noise shaping */
531                         decoder->contrast = pic->contrast;
532                         vpx3220_write(client, 0xe7,
533                                       (decoder->contrast >> 10) + 192);
534                 }
535                 if (decoder->sat != pic->colour) {
536                         /* We want 0 to 4096 we get 0-65535 */
537                         decoder->sat = pic->colour;
538                         vpx3220_fp_write(client, 0xa0,
539                                          decoder->sat >> 4);
540                 }
541                 if (decoder->hue != pic->hue) {
542                         /* We want -512 to 512 we get 0-65535 */
543                         decoder->hue = pic->hue;
544                         vpx3220_fp_write(client, 0x1c,
545                                          ((decoder->hue - 32768) >> 6) & 0xFFF);
546                 }
547         }
548                 break;
549
550         default:
551                 return -EINVAL;
552         }
553
554         return 0;
555 }
556
557 static int
558 vpx3220_init_client (struct i2c_client *client)
559 {
560         vpx3220_write_block(client, init_common, sizeof(init_common));
561         vpx3220_write_fp_block(client, init_fp, sizeof(init_fp) >> 1);
562         /* Default to PAL */
563         vpx3220_write_fp_block(client, init_pal, sizeof(init_pal) >> 1);
564
565         return 0;
566 }
567
568 /* -----------------------------------------------------------------------
569  * Client managment code
570  */
571
572 /*
573  * Generic i2c probe
574  * concerning the addresses: i2c wants 7 bit (without the r/w bit), so '>>1'
575  */
576 static unsigned short normal_i2c[] =
577     { I2C_VPX3220 >> 1, (I2C_VPX3220 >> 1) + 4,
578         I2C_CLIENT_END
579 };
580
581 static unsigned short ignore = I2C_CLIENT_END;
582                                                                                 
583 static struct i2c_client_address_data addr_data = {
584         .normal_i2c             = normal_i2c,
585         .probe                  = &ignore,
586         .ignore                 = &ignore,
587 };
588
589 static struct i2c_driver vpx3220_i2c_driver;
590
591 static int
592 vpx3220_detach_client (struct i2c_client *client)
593 {
594         struct vpx3220 *decoder = i2c_get_clientdata(client);
595         int err;
596
597         err = i2c_detach_client(client);
598         if (err) {
599                 return err;
600         }
601
602         kfree(decoder);
603         kfree(client);
604
605         return 0;
606 }
607
608 static int
609 vpx3220_detect_client (struct i2c_adapter *adapter,
610                        int                 address,
611                        int                 kind)
612 {
613         int err;
614         struct i2c_client *client;
615         struct vpx3220 *decoder;
616
617         dprintk(1, VPX3220_DEBUG "%s\n", __func__);
618
619         /* Check if the adapter supports the needed features */
620         if (!i2c_check_functionality
621             (adapter, I2C_FUNC_SMBUS_BYTE_DATA | I2C_FUNC_SMBUS_WORD_DATA))
622                 return 0;
623
624         client = kmalloc(sizeof(struct i2c_client), GFP_KERNEL);
625         if (client == NULL) {
626                 return -ENOMEM;
627         }
628
629         memset(client, 0, sizeof(struct i2c_client));
630
631         client->addr = address;
632         client->adapter = adapter;
633         client->driver = &vpx3220_i2c_driver;
634         client->flags = I2C_CLIENT_ALLOW_USE;
635
636         /* Check for manufacture ID and part number */
637         if (kind < 0) {
638                 u8 id;
639                 u16 pn;
640
641                 id = vpx3220_read(client, 0x00);
642                 if (id != 0xec) {
643                         dprintk(1,
644                                 KERN_INFO
645                                 "vpx3220_attach: Wrong manufacturer ID (0x%02x)\n",
646                                 id);
647                         kfree(client);
648                         return 0;
649                 }
650
651                 pn = (vpx3220_read(client, 0x02) << 8) +
652                     vpx3220_read(client, 0x01);
653                 switch (pn) {
654                 case 0x4680:
655                         strlcpy(I2C_NAME(client), "vpx3220a",
656                                 sizeof(I2C_NAME(client)));
657                         break;
658                 case 0x4260:
659                         strlcpy(I2C_NAME(client), "vpx3216b",
660                                 sizeof(I2C_NAME(client)));
661                         break;
662                 case 0x4280:
663                         strlcpy(I2C_NAME(client), "vpx3214c",
664                                 sizeof(I2C_NAME(client)));
665                         break;
666                 default:
667                         dprintk(1,
668                                 KERN_INFO 
669                                 "%s: Wrong part number (0x%04x)\n",
670                                 __func__, pn);
671                         kfree(client);
672                         return 0;
673                 }
674         } else {
675                 strlcpy(I2C_NAME(client), "forced vpx32xx",
676                         sizeof(I2C_NAME(client)));
677         }
678
679         decoder = kmalloc(sizeof(struct vpx3220), GFP_KERNEL);
680         if (decoder == NULL) {
681                 kfree(client);
682                 return -ENOMEM;
683         }
684         memset(decoder, 0, sizeof(struct vpx3220));
685         decoder->norm = VIDEO_MODE_PAL;
686         decoder->input = 0;
687         decoder->enable = 1;
688         decoder->bright = 32768;
689         decoder->contrast = 32768;
690         decoder->hue = 32768;
691         decoder->sat = 32768;
692         i2c_set_clientdata(client, decoder);
693
694         err = i2c_attach_client(client);
695         if (err) {
696                 kfree(client);
697                 kfree(decoder);
698                 return err;
699         }
700
701         dprintk(1, KERN_INFO "%s: vpx32xx client found at address 0x%02x\n",
702                 I2C_NAME(client), client->addr << 1);
703
704         vpx3220_init_client(client);
705
706         return 0;
707 }
708
709 static int
710 vpx3220_attach_adapter (struct i2c_adapter *adapter)
711 {
712         int ret;
713
714         ret = i2c_probe(adapter, &addr_data, &vpx3220_detect_client);
715         dprintk(1, VPX3220_DEBUG "%s: i2c_probe returned %d\n",
716                 __func__, ret);
717         return ret;
718 }
719
720 /* -----------------------------------------------------------------------
721  * Driver initialization and cleanup code
722  */
723
724 static struct i2c_driver vpx3220_i2c_driver = {
725         .owner = THIS_MODULE,
726         .name = "vpx3220",
727
728         .id = I2C_DRIVERID_VPX3220,
729         .flags = I2C_DF_NOTIFY,
730
731         .attach_adapter = vpx3220_attach_adapter,
732         .detach_client = vpx3220_detach_client,
733         .command = vpx3220_command,
734 };
735
736 static int __init
737 vpx3220_init (void)
738 {
739         return i2c_add_driver(&vpx3220_i2c_driver);
740 }
741
742 static void __exit
743 vpx3220_cleanup (void)
744 {
745         i2c_del_driver(&vpx3220_i2c_driver);
746 }
747
748 module_init(vpx3220_init);
749 module_exit(vpx3220_cleanup);
750
751 MODULE_DESCRIPTION("vpx3220a/vpx3216b/vpx3214c video encoder driver");
752 MODULE_AUTHOR("Laurent Pinchart");
753 MODULE_LICENSE("GPL");