[PATCH] v4l: update for SAA7134 cards
[linux-2.6.git] / drivers / media / video / saa7134 / saa6752hs.c
blobd14158b111bf655914f0fe691536d235a56fdc5c
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/videodev.h>
13 #include <linux/init.h>
14 #include <linux/crc32.h>
16 #include <media/id.h>
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)
23 /* Addresses to scan */
24 static unsigned short normal_i2c[] = {0x20, I2C_CLIENT_END};
25 static unsigned short normal_i2c_range[] = {I2C_CLIENT_END};
26 I2C_CLIENT_INSMOD;
28 MODULE_DESCRIPTION("device driver for saa6752hs MPEG2 encoder");
29 MODULE_AUTHOR("Andrew de Quincey");
30 MODULE_LICENSE("GPL");
32 static struct i2c_driver driver;
33 static struct i2c_client client_template;
35 enum saa6752hs_videoformat {
36 SAA6752HS_VF_D1 = 0, /* standard D1 video format: 720x576 */
37 SAA6752HS_VF_2_3_D1 = 1,/* 2/3D1 video format: 480x576 */
38 SAA6752HS_VF_1_2_D1 = 2,/* 1/2D1 video format: 352x576 */
39 SAA6752HS_VF_SIF = 3, /* SIF video format: 352x288 */
40 SAA6752HS_VF_UNKNOWN,
43 static const struct v4l2_format v4l2_format_table[] =
45 [SAA6752HS_VF_D1] =
46 { .fmt = { .pix = { .width = 720, .height = 576 }}},
47 [SAA6752HS_VF_2_3_D1] =
48 { .fmt = { .pix = { .width = 480, .height = 576 }}},
49 [SAA6752HS_VF_1_2_D1] =
50 { .fmt = { .pix = { .width = 352, .height = 576 }}},
51 [SAA6752HS_VF_SIF] =
52 { .fmt = { .pix = { .width = 352, .height = 288 }}},
53 [SAA6752HS_VF_UNKNOWN] =
54 { .fmt = { .pix = { .width = 0, .height = 0}}},
57 struct saa6752hs_state {
58 struct i2c_client client;
59 struct v4l2_mpeg_compression params;
60 enum saa6752hs_videoformat video_format;
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,
72 SAA6752HS_COMMAND_MAX
75 /* ---------------------------------------------------------------------- */
77 static u8 PAT[] = {
78 0xc2, // i2c register
79 0x00, // table number for encoder
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)
85 0x00, // PSI pointer to start of table
87 0x00, // tid(0)
88 0xb0, 0x0d, // section_syntax_indicator(1), section_length(13)
90 0x00, 0x01, // transport_stream_id(1)
92 0xc1, // version_number(0), current_next_indicator(1)
94 0x00, 0x00, // section_number(0), last_section_number(0)
96 0x00, 0x01, // program_number(1)
98 0xe0, 0x00, // PMT PID
100 0x00, 0x00, 0x00, 0x00 // CRC32
103 static u8 PMT[] = {
104 0xc2, // i2c register
105 0x01, // table number for encoder
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)
111 0x00, // PSI pointer to start of table
113 0x02, // tid(2)
114 0xb0, 0x17, // section_syntax_indicator(1), section_length(23)
116 0x00, 0x01, // program_number(1)
118 0xc1, // version_number(0), current_next_indicator(1)
120 0x00, 0x00, // section_number(0), last_section_number(0)
122 0xe0, 0x00, // PCR_PID
124 0xf0, 0x00, // program_info_length(0)
126 0x02, 0xe0, 0x00, 0xf0, 0x00, // video stream type(2), pid
127 0x04, 0xe0, 0x00, 0xf0, 0x00, // audio stream type(4), pid
129 0x00, 0x00, 0x00, 0x00 // CRC32
132 static struct v4l2_mpeg_compression param_defaults =
134 .st_type = V4L2_MPEG_TS_2,
135 .st_bitrate = {
136 .mode = V4L2_BITRATE_CBR,
137 .target = 7000,
140 .ts_pid_pmt = 16,
141 .ts_pid_video = 260,
142 .ts_pid_audio = 256,
143 .ts_pid_pcr = 259,
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,
153 .au_type = V4L2_MPEG_AU_2_II,
154 .au_bitrate = {
155 .mode = V4L2_BITRATE_CBR,
156 .target = 256,
159 #if 0
160 /* FIXME: size? via S_FMT? */
161 .video_format = MPEG_VIDEO_FORMAT_D1,
162 #endif
165 /* ---------------------------------------------------------------------- */
167 static int saa6752hs_chip_command(struct i2c_client* client,
168 enum saa6752hs_command command)
170 unsigned char buf[3];
171 unsigned long timeout;
172 int status = 0;
174 // execute the command
175 switch(command) {
176 case SAA6752HS_COMMAND_RESET:
177 buf[0] = 0x00;
178 break;
180 case SAA6752HS_COMMAND_STOP:
181 buf[0] = 0x03;
182 break;
184 case SAA6752HS_COMMAND_START:
185 buf[0] = 0x02;
186 break;
188 case SAA6752HS_COMMAND_PAUSE:
189 buf[0] = 0x04;
190 break;
192 case SAA6752HS_COMMAND_RECONFIGURE:
193 buf[0] = 0x05;
194 break;
196 case SAA6752HS_COMMAND_SLEEP:
197 buf[0] = 0x06;
198 break;
200 case SAA6752HS_COMMAND_RECONFIGURE_FORCE:
201 buf[0] = 0x07;
202 break;
204 default:
205 return -EINVAL;
208 // set it and wait for it to be so
209 i2c_master_send(client, buf, 1);
210 timeout = jiffies + HZ * 3;
211 for (;;) {
212 // get the current status
213 buf[0] = 0x10;
214 i2c_master_send(client, buf, 1);
215 i2c_master_recv(client, buf, 1);
217 if (!(buf[0] & 0x20))
218 break;
219 if (time_after(jiffies,timeout)) {
220 status = -ETIMEDOUT;
221 break;
224 // wait a bit
225 msleep(10);
228 // delay a bit to let encoder settle
229 msleep(50);
231 // done
232 return status;
236 static int saa6752hs_set_bitrate(struct i2c_client* client,
237 struct v4l2_mpeg_compression* params)
239 u8 buf[3];
241 // set the bitrate mode
242 buf[0] = 0x71;
243 buf[1] = (params->vi_bitrate.mode == V4L2_BITRATE_VBR) ? 0 : 1;
244 i2c_master_send(client, buf, 2);
246 // set the video bitrate
247 if (params->vi_bitrate.mode == V4L2_BITRATE_VBR) {
248 // set the target bitrate
249 buf[0] = 0x80;
250 buf[1] = params->vi_bitrate.target >> 8;
251 buf[2] = params->vi_bitrate.target & 0xff;
252 i2c_master_send(client, buf, 3);
254 // set the max bitrate
255 buf[0] = 0x81;
256 buf[1] = params->vi_bitrate.max >> 8;
257 buf[2] = params->vi_bitrate.max & 0xff;
258 i2c_master_send(client, buf, 3);
259 } else {
260 // set the target bitrate (no max bitrate for CBR)
261 buf[0] = 0x81;
262 buf[1] = params->vi_bitrate.target >> 8;
263 buf[2] = params->vi_bitrate.target & 0xff;
264 i2c_master_send(client, buf, 3);
267 // set the audio bitrate
268 buf[0] = 0x94;
269 buf[1] = (256 == params->au_bitrate.target) ? 0 : 1;
270 i2c_master_send(client, buf, 2);
272 // set the total bitrate
273 buf[0] = 0xb1;
274 buf[1] = params->st_bitrate.target >> 8;
275 buf[2] = params->st_bitrate.target & 0xff;
276 i2c_master_send(client, buf, 3);
278 // return success
279 return 0;
282 static void saa6752hs_set_subsampling(struct i2c_client* client,
283 struct v4l2_format* f)
285 struct saa6752hs_state *h = i2c_get_clientdata(client);
286 int dist_352, dist_480, dist_720;
289 FIXME: translate and round width/height into EMPRESS
290 subsample type:
292 type | PAL | NTSC
293 ---------------------------
294 SIF | 352x288 | 352x240
295 1/2 D1 | 352x576 | 352x480
296 2/3 D1 | 480x576 | 480x480
297 D1 | 720x576 | 720x480
300 dist_352 = abs(f->fmt.pix.width - 352);
301 dist_480 = abs(f->fmt.pix.width - 480);
302 dist_720 = abs(f->fmt.pix.width - 720);
303 if (dist_720 < dist_480) {
304 f->fmt.pix.width = 720;
305 f->fmt.pix.height = 576;
306 h->video_format = SAA6752HS_VF_D1;
308 else if (dist_480 < dist_352) {
309 f->fmt.pix.width = 480;
310 f->fmt.pix.height = 576;
311 h->video_format = SAA6752HS_VF_2_3_D1;
313 else {
314 f->fmt.pix.width = 352;
315 if (abs(f->fmt.pix.height - 576) <
316 abs(f->fmt.pix.height - 288)) {
317 f->fmt.pix.height = 576;
318 h->video_format = SAA6752HS_VF_1_2_D1;
320 else {
321 f->fmt.pix.height = 288;
322 h->video_format = SAA6752HS_VF_SIF;
328 static void saa6752hs_set_params(struct i2c_client* client,
329 struct v4l2_mpeg_compression* params)
331 struct saa6752hs_state *h = i2c_get_clientdata(client);
333 /* check PIDs */
334 if (params->ts_pid_pmt <= MPEG_PID_MAX)
335 h->params.ts_pid_pmt = params->ts_pid_pmt;
336 if (params->ts_pid_pcr <= MPEG_PID_MAX)
337 h->params.ts_pid_pcr = params->ts_pid_pcr;
338 if (params->ts_pid_video <= MPEG_PID_MAX)
339 h->params.ts_pid_video = params->ts_pid_video;
340 if (params->ts_pid_audio <= MPEG_PID_MAX)
341 h->params.ts_pid_audio = params->ts_pid_audio;
343 /* check bitrate parameters */
344 if ((params->vi_bitrate.mode == V4L2_BITRATE_CBR) ||
345 (params->vi_bitrate.mode == V4L2_BITRATE_VBR))
346 h->params.vi_bitrate.mode = params->vi_bitrate.mode;
347 if (params->vi_bitrate.mode != V4L2_BITRATE_NONE)
348 h->params.st_bitrate.target = params->st_bitrate.target;
349 if (params->vi_bitrate.mode != V4L2_BITRATE_NONE)
350 h->params.vi_bitrate.target = params->vi_bitrate.target;
351 if (params->vi_bitrate.mode == V4L2_BITRATE_VBR)
352 h->params.vi_bitrate.max = params->vi_bitrate.max;
353 if (params->au_bitrate.mode != V4L2_BITRATE_NONE)
354 h->params.au_bitrate.target = params->au_bitrate.target;
356 /* aspect ratio */
357 if (params->vi_aspect_ratio == V4L2_MPEG_ASPECT_4_3 ||
358 params->vi_aspect_ratio == V4L2_MPEG_ASPECT_16_9)
359 h->params.vi_aspect_ratio = params->vi_aspect_ratio;
361 /* range checks */
362 if (h->params.st_bitrate.target > MPEG_TOTAL_TARGET_BITRATE_MAX)
363 h->params.st_bitrate.target = MPEG_TOTAL_TARGET_BITRATE_MAX;
364 if (h->params.vi_bitrate.target > MPEG_VIDEO_TARGET_BITRATE_MAX)
365 h->params.vi_bitrate.target = MPEG_VIDEO_TARGET_BITRATE_MAX;
366 if (h->params.vi_bitrate.max > MPEG_VIDEO_MAX_BITRATE_MAX)
367 h->params.vi_bitrate.max = MPEG_VIDEO_MAX_BITRATE_MAX;
368 if (h->params.au_bitrate.target <= 256)
369 h->params.au_bitrate.target = 256;
370 else
371 h->params.au_bitrate.target = 384;
374 static int saa6752hs_init(struct i2c_client* client)
376 unsigned char buf[9], buf2[4];
377 struct saa6752hs_state *h;
378 u32 crc;
379 unsigned char localPAT[256];
380 unsigned char localPMT[256];
382 h = i2c_get_clientdata(client);
384 // Set video format - must be done first as it resets other settings
385 buf[0] = 0x41;
386 buf[1] = h->video_format;
387 i2c_master_send(client, buf, 2);
389 // set bitrate
390 saa6752hs_set_bitrate(client, &h->params);
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);
398 // Set minimum Q-scale {4}
399 buf[0] = 0x82;
400 buf[1] = 0x04;
401 i2c_master_send(client,buf,2);
403 // Set maximum Q-scale {12}
404 buf[0] = 0x83;
405 buf[1] = 0x0C;
406 i2c_master_send(client,buf,2);
408 // Set Output Protocol
409 buf[0] = 0xD0;
410 buf[1] = 0x81;
411 i2c_master_send(client,buf,2);
413 // Set video output stream format {TS}
414 buf[0] = 0xB0;
415 buf[1] = 0x05;
416 i2c_master_send(client,buf,2);
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;
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;
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);
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);
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);
462 // Send SI tables
463 i2c_master_send(client,localPAT,sizeof(PAT));
464 i2c_master_send(client,localPMT,sizeof(PMT));
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);
473 // start it going
474 saa6752hs_chip_command(client, SAA6752HS_COMMAND_START);
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);
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;
502 buf[7] = buf2[2];
503 buf[8] = buf2[3];
504 i2c_master_send(client, buf, 9);
506 // return success
507 return 0;
510 static int saa6752hs_attach(struct i2c_adapter *adap, int addr, int kind)
512 struct saa6752hs_state *h;
514 printk("saa6752hs: chip found @ 0x%x\n", addr<<1);
516 if (NULL == (h = kmalloc(sizeof(*h), GFP_KERNEL)))
517 return -ENOMEM;
518 memset(h,0,sizeof(*h));
519 h->client = client_template;
520 h->params = param_defaults;
521 h->client.adapter = adap;
522 h->client.addr = addr;
524 i2c_set_clientdata(&h->client, h);
525 i2c_attach_client(&h->client);
526 return 0;
529 static int saa6752hs_probe(struct i2c_adapter *adap)
531 if (adap->class & I2C_CLASS_TV_ANALOG)
532 return i2c_probe(adap, &addr_data, saa6752hs_attach);
533 return 0;
536 static int saa6752hs_detach(struct i2c_client *client)
538 struct saa6752hs_state *h;
540 h = i2c_get_clientdata(client);
541 i2c_detach_client(client);
542 kfree(h);
543 return 0;
546 static int
547 saa6752hs_command(struct i2c_client *client, unsigned int cmd, void *arg)
549 struct saa6752hs_state *h = i2c_get_clientdata(client);
550 struct v4l2_mpeg_compression *params = arg;
551 int err = 0;
553 switch (cmd) {
554 case VIDIOC_S_MPEGCOMP:
555 if (NULL == params) {
556 /* apply settings and start encoder */
557 saa6752hs_init(client);
558 break;
560 saa6752hs_set_params(client, params);
561 /* fall through */
562 case VIDIOC_G_MPEGCOMP:
563 *params = h->params;
564 break;
565 case VIDIOC_G_FMT:
567 struct v4l2_format *f = arg;
569 if (h->video_format == SAA6752HS_VF_UNKNOWN)
570 h->video_format = SAA6752HS_VF_D1;
571 f->fmt.pix.width =
572 v4l2_format_table[h->video_format].fmt.pix.width;
573 f->fmt.pix.height =
574 v4l2_format_table[h->video_format].fmt.pix.height;
575 break ;
577 case VIDIOC_S_FMT:
579 struct v4l2_format *f = arg;
581 saa6752hs_set_subsampling(client, f);
582 break;
584 default:
585 /* nothing */
586 break;
589 return err;
592 /* ----------------------------------------------------------------------- */
594 static struct i2c_driver driver = {
595 .owner = THIS_MODULE,
596 .name = "i2c saa6752hs MPEG encoder",
597 .id = I2C_DRIVERID_SAA6752HS,
598 .flags = I2C_DF_NOTIFY,
599 .attach_adapter = saa6752hs_probe,
600 .detach_client = saa6752hs_detach,
601 .command = saa6752hs_command,
604 static struct i2c_client client_template =
606 I2C_DEVNAME("saa6752hs"),
607 .flags = I2C_CLIENT_ALLOW_USE,
608 .driver = &driver,
611 static int __init saa6752hs_init_module(void)
613 return i2c_add_driver(&driver);
616 static void __exit saa6752hs_cleanup_module(void)
618 i2c_del_driver(&driver);
621 module_init(saa6752hs_init_module);
622 module_exit(saa6752hs_cleanup_module);
625 * Overrides for Emacs so that we follow Linus's tabbing style.
626 * ---------------------------------------------------------------------------
627 * Local variables:
628 * c-basic-offset: 8
629 * End: