V4L/DVB (4118): Whitespace cleanups
[linux-2.6.git] / drivers / media / video / saa7134 / saa6752hs.c
1 #include <linux/module.h>
2 #include <linux/kernel.h>
3 #include <linux/sched.h>
4 #include <linux/string.h>
5 #include <linux/timer.h>
6 #include <linux/delay.h>
7 #include <linux/errno.h>
8 #include <linux/slab.h>
9 #include <linux/poll.h>
10 #include <linux/i2c.h>
11 #include <linux/types.h>
12 #include <linux/videodev2.h>
13 #include <media/v4l2-common.h>
14 #include <linux/init.h>
15 #include <linux/crc32.h>
16
17
18 #define MPEG_VIDEO_TARGET_BITRATE_MAX  27000
19 #define MPEG_VIDEO_MAX_BITRATE_MAX     27000
20 #define MPEG_TOTAL_TARGET_BITRATE_MAX  27000
21 #define MPEG_PID_MAX ((1 << 14) - 1)
22
23 /* Addresses to scan */
24 static unsigned short normal_i2c[] = {0x20, I2C_CLIENT_END};
25 I2C_CLIENT_INSMOD;
26
27 MODULE_DESCRIPTION("device driver for saa6752hs MPEG2 encoder");
28 MODULE_AUTHOR("Andrew de Quincey");
29 MODULE_LICENSE("GPL");
30
31 static struct i2c_driver driver;
32 static struct i2c_client client_template;
33
34 enum saa6752hs_videoformat {
35         SAA6752HS_VF_D1 = 0,    /* standard D1 video format: 720x576 */
36         SAA6752HS_VF_2_3_D1 = 1,/* 2/3D1 video format: 480x576 */
37         SAA6752HS_VF_1_2_D1 = 2,/* 1/2D1 video format: 352x576 */
38         SAA6752HS_VF_SIF = 3,   /* SIF video format: 352x288 */
39         SAA6752HS_VF_UNKNOWN,
40 };
41
42 static const struct v4l2_format v4l2_format_table[] =
43 {
44         [SAA6752HS_VF_D1] =
45                 { .fmt = { .pix = { .width = 720, .height = 576 }}},
46         [SAA6752HS_VF_2_3_D1] =
47                 { .fmt = { .pix = { .width = 480, .height = 576 }}},
48         [SAA6752HS_VF_1_2_D1] =
49                 { .fmt = { .pix = { .width = 352, .height = 576 }}},
50         [SAA6752HS_VF_SIF] =
51                 { .fmt = { .pix = { .width = 352, .height = 288 }}},
52         [SAA6752HS_VF_UNKNOWN] =
53                 { .fmt = { .pix = { .width = 0, .height = 0}}},
54 };
55
56 struct saa6752hs_state {
57         struct i2c_client             client;
58         struct v4l2_mpeg_compression  params;
59         enum saa6752hs_videoformat    video_format;
60         v4l2_std_id                   standard;
61 };
62
63 enum saa6752hs_command {
64         SAA6752HS_COMMAND_RESET = 0,
65         SAA6752HS_COMMAND_STOP = 1,
66         SAA6752HS_COMMAND_START = 2,
67         SAA6752HS_COMMAND_PAUSE = 3,
68         SAA6752HS_COMMAND_RECONFIGURE = 4,
69         SAA6752HS_COMMAND_SLEEP = 5,
70         SAA6752HS_COMMAND_RECONFIGURE_FORCE = 6,
71
72         SAA6752HS_COMMAND_MAX
73 };
74
75 /* ---------------------------------------------------------------------- */
76
77 static u8 PAT[] = {
78         0xc2, /* i2c register */
79         0x00, /* table number for encoder */
80
81         0x47, /* sync */
82         0x40, 0x00, /* transport_error_indicator(0), payload_unit_start(1), transport_priority(0), pid(0) */
83         0x10, /* transport_scrambling_control(00), adaptation_field_control(01), continuity_counter(0) */
84
85         0x00, /* PSI pointer to start of table */
86
87         0x00, /* tid(0) */
88         0xb0, 0x0d, /* section_syntax_indicator(1), section_length(13) */
89
90         0x00, 0x01, /* transport_stream_id(1) */
91
92         0xc1, /* version_number(0), current_next_indicator(1) */
93
94         0x00, 0x00, /* section_number(0), last_section_number(0) */
95
96         0x00, 0x01, /* program_number(1) */
97
98         0xe0, 0x00, /* PMT PID */
99
100         0x00, 0x00, 0x00, 0x00 /* CRC32 */
101 };
102
103 static u8 PMT[] = {
104         0xc2, /* i2c register */
105         0x01, /* table number for encoder */
106
107         0x47, /* sync */
108         0x40, 0x00, /* transport_error_indicator(0), payload_unit_start(1), transport_priority(0), pid */
109         0x10, /* transport_scrambling_control(00), adaptation_field_control(01), continuity_counter(0) */
110
111         0x00, /* PSI pointer to start of table */
112
113         0x02, /* tid(2) */
114         0xb0, 0x17, /* section_syntax_indicator(1), section_length(23) */
115
116         0x00, 0x01, /* program_number(1) */
117
118         0xc1, /* version_number(0), current_next_indicator(1) */
119
120         0x00, 0x00, /* section_number(0), last_section_number(0) */
121
122         0xe0, 0x00, /* PCR_PID */
123
124         0xf0, 0x00, /* program_info_length(0) */
125
126         0x02, 0xe0, 0x00, 0xf0, 0x00, /* video stream type(2), pid */
127         0x04, 0xe0, 0x00, 0xf0, 0x00, /* audio stream type(4), pid */
128
129         0x00, 0x00, 0x00, 0x00 /* CRC32 */
130 };
131
132 static struct v4l2_mpeg_compression param_defaults =
133 {
134         .st_type         = V4L2_MPEG_TS_2,
135         .st_bitrate      = {
136                 .mode    = V4L2_BITRATE_CBR,
137                 .target  = 7000,
138         },
139
140         .ts_pid_pmt      = 16,
141         .ts_pid_video    = 260,
142         .ts_pid_audio    = 256,
143         .ts_pid_pcr      = 259,
144
145         .vi_type         = V4L2_MPEG_VI_2,
146         .vi_aspect_ratio = V4L2_MPEG_ASPECT_4_3,
147         .vi_bitrate      = {
148                 .mode    = V4L2_BITRATE_VBR,
149                 .target  = 4000,
150                 .max     = 6000,
151         },
152
153         .au_type         = V4L2_MPEG_AU_2_II,
154         .au_bitrate      = {
155                 .mode    = V4L2_BITRATE_CBR,
156                 .target  = 256,
157         },
158
159 };
160
161 /* ---------------------------------------------------------------------- */
162
163 static int saa6752hs_chip_command(struct i2c_client* client,
164                                   enum saa6752hs_command command)
165 {
166         unsigned char buf[3];
167         unsigned long timeout;
168         int status = 0;
169
170         /* execute the command */
171         switch(command) {
172         case SAA6752HS_COMMAND_RESET:
173                 buf[0] = 0x00;
174                 break;
175
176         case SAA6752HS_COMMAND_STOP:
177                 buf[0] = 0x03;
178                 break;
179
180         case SAA6752HS_COMMAND_START:
181                 buf[0] = 0x02;
182                 break;
183
184         case SAA6752HS_COMMAND_PAUSE:
185                 buf[0] = 0x04;
186                 break;
187
188         case SAA6752HS_COMMAND_RECONFIGURE:
189                 buf[0] = 0x05;
190                 break;
191
192         case SAA6752HS_COMMAND_SLEEP:
193                 buf[0] = 0x06;
194                 break;
195
196         case SAA6752HS_COMMAND_RECONFIGURE_FORCE:
197                 buf[0] = 0x07;
198                 break;
199
200         default:
201                 return -EINVAL;
202         }
203
204         /* set it and wait for it to be so */
205         i2c_master_send(client, buf, 1);
206         timeout = jiffies + HZ * 3;
207         for (;;) {
208                 /* get the current status */
209                 buf[0] = 0x10;
210                 i2c_master_send(client, buf, 1);
211                 i2c_master_recv(client, buf, 1);
212
213                 if (!(buf[0] & 0x20))
214                         break;
215                 if (time_after(jiffies,timeout)) {
216                         status = -ETIMEDOUT;
217                         break;
218                 }
219
220                 msleep(10);
221         }
222
223         /* delay a bit to let encoder settle */
224         msleep(50);
225
226         return status;
227 }
228
229
230 static int saa6752hs_set_bitrate(struct i2c_client* client,
231                                  struct v4l2_mpeg_compression* params)
232 {
233         u8 buf[3];
234
235         /* set the bitrate mode */
236         buf[0] = 0x71;
237         buf[1] = (params->vi_bitrate.mode == V4L2_BITRATE_VBR) ? 0 : 1;
238         i2c_master_send(client, buf, 2);
239
240         /* set the video bitrate */
241         if (params->vi_bitrate.mode == V4L2_BITRATE_VBR) {
242                 /* set the target bitrate */
243                 buf[0] = 0x80;
244                 buf[1] = params->vi_bitrate.target >> 8;
245                 buf[2] = params->vi_bitrate.target & 0xff;
246                 i2c_master_send(client, buf, 3);
247
248                 /* set the max bitrate */
249                 buf[0] = 0x81;
250                 buf[1] = params->vi_bitrate.max >> 8;
251                 buf[2] = params->vi_bitrate.max & 0xff;
252                 i2c_master_send(client, buf, 3);
253         } else {
254                 /* set the target bitrate (no max bitrate for CBR) */
255                 buf[0] = 0x81;
256                 buf[1] = params->vi_bitrate.target >> 8;
257                 buf[2] = params->vi_bitrate.target & 0xff;
258                 i2c_master_send(client, buf, 3);
259         }
260
261         /* set the audio bitrate */
262         buf[0] = 0x94;
263         buf[1] = (256 == params->au_bitrate.target) ? 0 : 1;
264         i2c_master_send(client, buf, 2);
265
266         /* set the total bitrate */
267         buf[0] = 0xb1;
268         buf[1] = params->st_bitrate.target >> 8;
269         buf[2] = params->st_bitrate.target & 0xff;
270         i2c_master_send(client, buf, 3);
271
272         return 0;
273 }
274
275 static void saa6752hs_set_subsampling(struct i2c_client* client,
276                                       struct v4l2_format* f)
277 {
278         struct saa6752hs_state *h = i2c_get_clientdata(client);
279         int dist_352, dist_480, dist_720;
280
281         /*
282           FIXME: translate and round width/height into EMPRESS
283           subsample type:
284
285           type   |   PAL   |  NTSC
286           ---------------------------
287           SIF    | 352x288 | 352x240
288           1/2 D1 | 352x576 | 352x480
289           2/3 D1 | 480x576 | 480x480
290           D1     | 720x576 | 720x480
291         */
292
293         dist_352 = abs(f->fmt.pix.width - 352);
294         dist_480 = abs(f->fmt.pix.width - 480);
295         dist_720 = abs(f->fmt.pix.width - 720);
296         if (dist_720 < dist_480) {
297                 f->fmt.pix.width = 720;
298                 f->fmt.pix.height = 576;
299                 h->video_format = SAA6752HS_VF_D1;
300         }
301         else if (dist_480 < dist_352) {
302                 f->fmt.pix.width = 480;
303                 f->fmt.pix.height = 576;
304                 h->video_format = SAA6752HS_VF_2_3_D1;
305         }
306         else {
307                 f->fmt.pix.width = 352;
308                 if (abs(f->fmt.pix.height - 576) <
309                     abs(f->fmt.pix.height - 288)) {
310                         f->fmt.pix.height = 576;
311                         h->video_format = SAA6752HS_VF_1_2_D1;
312                 }
313                 else {
314                         f->fmt.pix.height = 288;
315                         h->video_format = SAA6752HS_VF_SIF;
316                 }
317         }
318 }
319
320
321 static void saa6752hs_set_params(struct i2c_client* client,
322                                  struct v4l2_mpeg_compression* params)
323 {
324         struct saa6752hs_state *h = i2c_get_clientdata(client);
325
326         /* check PIDs */
327         if (params->ts_pid_pmt <= MPEG_PID_MAX)
328                 h->params.ts_pid_pmt = params->ts_pid_pmt;
329         if (params->ts_pid_pcr <= MPEG_PID_MAX)
330                 h->params.ts_pid_pcr = params->ts_pid_pcr;
331         if (params->ts_pid_video <= MPEG_PID_MAX)
332                 h->params.ts_pid_video = params->ts_pid_video;
333         if (params->ts_pid_audio <= MPEG_PID_MAX)
334                 h->params.ts_pid_audio = params->ts_pid_audio;
335
336         /* check bitrate parameters */
337         if ((params->vi_bitrate.mode == V4L2_BITRATE_CBR) ||
338             (params->vi_bitrate.mode == V4L2_BITRATE_VBR))
339                 h->params.vi_bitrate.mode = params->vi_bitrate.mode;
340         if (params->vi_bitrate.mode != V4L2_BITRATE_NONE)
341                 h->params.st_bitrate.target = params->st_bitrate.target;
342         if (params->vi_bitrate.mode != V4L2_BITRATE_NONE)
343                 h->params.vi_bitrate.target = params->vi_bitrate.target;
344         if (params->vi_bitrate.mode == V4L2_BITRATE_VBR)
345                 h->params.vi_bitrate.max = params->vi_bitrate.max;
346         if (params->au_bitrate.mode != V4L2_BITRATE_NONE)
347                 h->params.au_bitrate.target = params->au_bitrate.target;
348
349         /* aspect ratio */
350         if (params->vi_aspect_ratio == V4L2_MPEG_ASPECT_4_3 ||
351             params->vi_aspect_ratio == V4L2_MPEG_ASPECT_16_9)
352                 h->params.vi_aspect_ratio = params->vi_aspect_ratio;
353
354         /* range checks */
355         if (h->params.st_bitrate.target > MPEG_TOTAL_TARGET_BITRATE_MAX)
356                 h->params.st_bitrate.target = MPEG_TOTAL_TARGET_BITRATE_MAX;
357         if (h->params.vi_bitrate.target > MPEG_VIDEO_TARGET_BITRATE_MAX)
358                 h->params.vi_bitrate.target = MPEG_VIDEO_TARGET_BITRATE_MAX;
359         if (h->params.vi_bitrate.max > MPEG_VIDEO_MAX_BITRATE_MAX)
360                 h->params.vi_bitrate.max = MPEG_VIDEO_MAX_BITRATE_MAX;
361         if (h->params.au_bitrate.target <= 256)
362                 h->params.au_bitrate.target = 256;
363         else
364                 h->params.au_bitrate.target = 384;
365 }
366
367 static int saa6752hs_init(struct i2c_client* client)
368 {
369         unsigned char buf[9], buf2[4];
370         struct saa6752hs_state *h;
371         u32 crc;
372         unsigned char localPAT[256];
373         unsigned char localPMT[256];
374
375         h = i2c_get_clientdata(client);
376
377         /* Set video format - must be done first as it resets other settings */
378         buf[0] = 0x41;
379         buf[1] = h->video_format;
380         i2c_master_send(client, buf, 2);
381
382         /* Set number of lines in input signal */
383         buf[0] = 0x40;
384         buf[1] = 0x00;
385         if (h->standard & V4L2_STD_525_60)
386                 buf[1] = 0x01;
387         i2c_master_send(client, buf, 2);
388
389         /* set bitrate */
390         saa6752hs_set_bitrate(client, &h->params);
391
392         /* Set GOP structure {3, 13} */
393         buf[0] = 0x72;
394         buf[1] = 0x03;
395         buf[2] = 0x0D;
396         i2c_master_send(client,buf,3);
397
398         /* Set minimum Q-scale {4} */
399         buf[0] = 0x82;
400         buf[1] = 0x04;
401         i2c_master_send(client,buf,2);
402
403         /* Set maximum Q-scale {12} */
404         buf[0] = 0x83;
405         buf[1] = 0x0C;
406         i2c_master_send(client,buf,2);
407
408         /* Set Output Protocol */
409         buf[0] = 0xD0;
410         buf[1] = 0x81;
411         i2c_master_send(client,buf,2);
412
413         /* Set video output stream format {TS} */
414         buf[0] = 0xB0;
415         buf[1] = 0x05;
416         i2c_master_send(client,buf,2);
417
418         /* compute PAT */
419         memcpy(localPAT, PAT, sizeof(PAT));
420         localPAT[17] = 0xe0 | ((h->params.ts_pid_pmt >> 8) & 0x0f);
421         localPAT[18] = h->params.ts_pid_pmt & 0xff;
422         crc = crc32_be(~0, &localPAT[7], sizeof(PAT) - 7 - 4);
423         localPAT[sizeof(PAT) - 4] = (crc >> 24) & 0xFF;
424         localPAT[sizeof(PAT) - 3] = (crc >> 16) & 0xFF;
425         localPAT[sizeof(PAT) - 2] = (crc >> 8) & 0xFF;
426         localPAT[sizeof(PAT) - 1] = crc & 0xFF;
427
428         /* compute PMT */
429         memcpy(localPMT, PMT, sizeof(PMT));
430         localPMT[3] = 0x40 | ((h->params.ts_pid_pmt >> 8) & 0x0f);
431         localPMT[4] = h->params.ts_pid_pmt & 0xff;
432         localPMT[15] = 0xE0 | ((h->params.ts_pid_pcr >> 8) & 0x0F);
433         localPMT[16] = h->params.ts_pid_pcr & 0xFF;
434         localPMT[20] = 0xE0 | ((h->params.ts_pid_video >> 8) & 0x0F);
435         localPMT[21] = h->params.ts_pid_video & 0xFF;
436         localPMT[25] = 0xE0 | ((h->params.ts_pid_audio >> 8) & 0x0F);
437         localPMT[26] = h->params.ts_pid_audio & 0xFF;
438         crc = crc32_be(~0, &localPMT[7], sizeof(PMT) - 7 - 4);
439         localPMT[sizeof(PMT) - 4] = (crc >> 24) & 0xFF;
440         localPMT[sizeof(PMT) - 3] = (crc >> 16) & 0xFF;
441         localPMT[sizeof(PMT) - 2] = (crc >> 8) & 0xFF;
442         localPMT[sizeof(PMT) - 1] = crc & 0xFF;
443
444         /* Set Audio PID */
445         buf[0] = 0xC1;
446         buf[1] = (h->params.ts_pid_audio >> 8) & 0xFF;
447         buf[2] = h->params.ts_pid_audio & 0xFF;
448         i2c_master_send(client,buf,3);
449
450         /* Set Video PID */
451         buf[0] = 0xC0;
452         buf[1] = (h->params.ts_pid_video >> 8) & 0xFF;
453         buf[2] = h->params.ts_pid_video & 0xFF;
454         i2c_master_send(client,buf,3);
455
456         /* Set PCR PID */
457         buf[0] = 0xC4;
458         buf[1] = (h->params.ts_pid_pcr >> 8) & 0xFF;
459         buf[2] = h->params.ts_pid_pcr & 0xFF;
460         i2c_master_send(client,buf,3);
461
462         /* Send SI tables */
463         i2c_master_send(client,localPAT,sizeof(PAT));
464         i2c_master_send(client,localPMT,sizeof(PMT));
465
466         /* mute then unmute audio. This removes buzzing artefacts */
467         buf[0] = 0xa4;
468         buf[1] = 1;
469         i2c_master_send(client, buf, 2);
470         buf[1] = 0;
471         i2c_master_send(client, buf, 2);
472
473         /* start it going */
474         saa6752hs_chip_command(client, SAA6752HS_COMMAND_START);
475
476         /* readout current state */
477         buf[0] = 0xE1;
478         buf[1] = 0xA7;
479         buf[2] = 0xFE;
480         buf[3] = 0x82;
481         buf[4] = 0xB0;
482         i2c_master_send(client, buf, 5);
483         i2c_master_recv(client, buf2, 4);
484
485         /* change aspect ratio */
486         buf[0] = 0xE0;
487         buf[1] = 0xA7;
488         buf[2] = 0xFE;
489         buf[3] = 0x82;
490         buf[4] = 0xB0;
491         buf[5] = buf2[0];
492         switch(h->params.vi_aspect_ratio) {
493         case V4L2_MPEG_ASPECT_16_9:
494                 buf[6] = buf2[1] | 0x40;
495                 break;
496         case V4L2_MPEG_ASPECT_4_3:
497         default:
498                 buf[6] = buf2[1] & 0xBF;
499                 break;
500                 break;
501         }
502         buf[7] = buf2[2];
503         buf[8] = buf2[3];
504         i2c_master_send(client, buf, 9);
505
506         return 0;
507 }
508
509 static int saa6752hs_attach(struct i2c_adapter *adap, int addr, int kind)
510 {
511         struct saa6752hs_state *h;
512
513
514         if (NULL == (h = kzalloc(sizeof(*h), GFP_KERNEL)))
515                 return -ENOMEM;
516         h->client = client_template;
517         h->params = param_defaults;
518         h->client.adapter = adap;
519         h->client.addr = addr;
520
521         /* Assume 625 input lines */
522         h->standard = 0;
523
524         i2c_set_clientdata(&h->client, h);
525         i2c_attach_client(&h->client);
526
527         v4l_info(&h->client,"saa6752hs: chip found @ 0x%x\n", addr<<1);
528
529         return 0;
530 }
531
532 static int saa6752hs_probe(struct i2c_adapter *adap)
533 {
534         if (adap->class & I2C_CLASS_TV_ANALOG)
535                 return i2c_probe(adap, &addr_data, saa6752hs_attach);
536         return 0;
537 }
538
539 static int saa6752hs_detach(struct i2c_client *client)
540 {
541         struct saa6752hs_state *h;
542
543         h = i2c_get_clientdata(client);
544         i2c_detach_client(client);
545         kfree(h);
546         return 0;
547 }
548
549 static int
550 saa6752hs_command(struct i2c_client *client, unsigned int cmd, void *arg)
551 {
552         struct saa6752hs_state *h = i2c_get_clientdata(client);
553         struct v4l2_mpeg_compression *params = arg;
554         int err = 0;
555
556         switch (cmd) {
557         case VIDIOC_S_MPEGCOMP:
558                 if (NULL == params) {
559                         /* apply settings and start encoder */
560                         saa6752hs_init(client);
561                         break;
562                 }
563                 saa6752hs_set_params(client, params);
564                 /* fall through */
565         case VIDIOC_G_MPEGCOMP:
566                 *params = h->params;
567                 break;
568         case VIDIOC_G_FMT:
569         {
570            struct v4l2_format *f = arg;
571
572            if (h->video_format == SAA6752HS_VF_UNKNOWN)
573                    h->video_format = SAA6752HS_VF_D1;
574            f->fmt.pix.width =
575                    v4l2_format_table[h->video_format].fmt.pix.width;
576            f->fmt.pix.height =
577                    v4l2_format_table[h->video_format].fmt.pix.height;
578            break ;
579         }
580         case VIDIOC_S_FMT:
581         {
582                 struct v4l2_format *f = arg;
583
584                 saa6752hs_set_subsampling(client, f);
585                 break;
586         }
587         case VIDIOC_S_STD:
588                 h->standard = *((v4l2_std_id *) arg);
589                 break;
590         default:
591                 /* nothing */
592                 break;
593         }
594
595         return err;
596 }
597
598 /* ----------------------------------------------------------------------- */
599
600 static struct i2c_driver driver = {
601         .driver = {
602                 .name   = "saa6752hs",
603         },
604         .id             = I2C_DRIVERID_SAA6752HS,
605         .attach_adapter = saa6752hs_probe,
606         .detach_client  = saa6752hs_detach,
607         .command        = saa6752hs_command,
608 };
609
610 static struct i2c_client client_template =
611 {
612         .name       = "saa6752hs",
613         .driver     = &driver,
614 };
615
616 static int __init saa6752hs_init_module(void)
617 {
618         return i2c_add_driver(&driver);
619 }
620
621 static void __exit saa6752hs_cleanup_module(void)
622 {
623         i2c_del_driver(&driver);
624 }
625
626 module_init(saa6752hs_init_module);
627 module_exit(saa6752hs_cleanup_module);
628
629 /*
630  * Overrides for Emacs so that we follow Linus's tabbing style.
631  * ---------------------------------------------------------------------------
632  * Local variables:
633  * c-basic-offset: 8
634  * End:
635  */