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>
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};
27 MODULE_DESCRIPTION("device driver for saa6752hs MPEG2 encoder");
28 MODULE_AUTHOR("Andrew de Quincey");
29 MODULE_LICENSE("GPL");
31 static struct i2c_driver driver;
32 static struct i2c_client client_template;
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 */
42 static const struct v4l2_format v4l2_format_table[] =
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 }}},
51 { .fmt = { .pix = { .width = 352, .height = 288 }}},
52 [SAA6752HS_VF_UNKNOWN] =
53 { .fmt = { .pix = { .width = 0, .height = 0}}},
56 struct saa6752hs_state {
57 struct i2c_client client;
58 struct v4l2_mpeg_compression params;
59 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,
75 /* ---------------------------------------------------------------------- */
78 0xc2, /* i2c register */
79 0x00, /* table number for encoder */
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 */
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 */
104 0xc2, /* i2c register */
105 0x01, /* table number for encoder */
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 */
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,
136 .mode = V4L2_BITRATE_CBR,
145 .vi_type = V4L2_MPEG_VI_2,
146 .vi_aspect_ratio = V4L2_MPEG_ASPECT_4_3,
148 .mode = V4L2_BITRATE_VBR,
153 .au_type = V4L2_MPEG_AU_2_II,
155 .mode = V4L2_BITRATE_CBR,
161 /* ---------------------------------------------------------------------- */
163 static int saa6752hs_chip_command(struct i2c_client* client,
164 enum saa6752hs_command command)
166 unsigned char buf[3];
167 unsigned long timeout;
170 /* execute the command */
172 case SAA6752HS_COMMAND_RESET:
176 case SAA6752HS_COMMAND_STOP:
180 case SAA6752HS_COMMAND_START:
184 case SAA6752HS_COMMAND_PAUSE:
188 case SAA6752HS_COMMAND_RECONFIGURE:
192 case SAA6752HS_COMMAND_SLEEP:
196 case SAA6752HS_COMMAND_RECONFIGURE_FORCE:
204 /* set it and wait for it to be so */
205 i2c_master_send(client, buf, 1);
206 timeout = jiffies + HZ * 3;
208 /* get the current status */
210 i2c_master_send(client, buf, 1);
211 i2c_master_recv(client, buf, 1);
213 if (!(buf[0] & 0x20))
215 if (time_after(jiffies,timeout)) {
223 /* delay a bit to let encoder settle */
230 static int saa6752hs_set_bitrate(struct i2c_client* client,
231 struct v4l2_mpeg_compression* params)
235 /* set the bitrate mode */
237 buf[1] = (params->vi_bitrate.mode == V4L2_BITRATE_VBR) ? 0 : 1;
238 i2c_master_send(client, buf, 2);
240 /* set the video bitrate */
241 if (params->vi_bitrate.mode == V4L2_BITRATE_VBR) {
242 /* set the target bitrate */
244 buf[1] = params->vi_bitrate.target >> 8;
245 buf[2] = params->vi_bitrate.target & 0xff;
246 i2c_master_send(client, buf, 3);
248 /* set the max bitrate */
250 buf[1] = params->vi_bitrate.max >> 8;
251 buf[2] = params->vi_bitrate.max & 0xff;
252 i2c_master_send(client, buf, 3);
254 /* set the target bitrate (no max bitrate for CBR) */
256 buf[1] = params->vi_bitrate.target >> 8;
257 buf[2] = params->vi_bitrate.target & 0xff;
258 i2c_master_send(client, buf, 3);
261 /* set the audio bitrate */
263 buf[1] = (256 == params->au_bitrate.target) ? 0 : 1;
264 i2c_master_send(client, buf, 2);
266 /* set the total bitrate */
268 buf[1] = params->st_bitrate.target >> 8;
269 buf[2] = params->st_bitrate.target & 0xff;
270 i2c_master_send(client, buf, 3);
275 static void saa6752hs_set_subsampling(struct i2c_client* client,
276 struct v4l2_format* f)
278 struct saa6752hs_state *h = i2c_get_clientdata(client);
279 int dist_352, dist_480, dist_720;
282 FIXME: translate and round width/height into EMPRESS
286 ---------------------------
287 SIF | 352x288 | 352x240
288 1/2 D1 | 352x576 | 352x480
289 2/3 D1 | 480x576 | 480x480
290 D1 | 720x576 | 720x480
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;
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;
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;
314 f->fmt.pix.height = 288;
315 h->video_format = SAA6752HS_VF_SIF;
321 static void saa6752hs_set_params(struct i2c_client* client,
322 struct v4l2_mpeg_compression* params)
324 struct saa6752hs_state *h = i2c_get_clientdata(client);
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;
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;
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;
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;
364 h->params.au_bitrate.target = 384;
367 static int saa6752hs_init(struct i2c_client* client)
369 unsigned char buf[9], buf2[4];
370 struct saa6752hs_state *h;
372 unsigned char localPAT[256];
373 unsigned char localPMT[256];
375 h = i2c_get_clientdata(client);
377 /* Set video format - must be done first as it resets other settings */
379 buf[1] = h->video_format;
380 i2c_master_send(client, buf, 2);
382 /* Set number of lines in input signal */
385 if (h->standard & V4L2_STD_525_60)
387 i2c_master_send(client, buf, 2);
390 saa6752hs_set_bitrate(client, &h->params);
392 /* Set GOP structure {3, 13} */
396 i2c_master_send(client,buf,3);
398 /* Set minimum Q-scale {4} */
401 i2c_master_send(client,buf,2);
403 /* Set maximum Q-scale {12} */
406 i2c_master_send(client,buf,2);
408 /* Set Output Protocol */
411 i2c_master_send(client,buf,2);
413 /* Set video output stream format {TS} */
416 i2c_master_send(client,buf,2);
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;
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;
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);
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);
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);
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 */
469 i2c_master_send(client, buf, 2);
471 i2c_master_send(client, buf, 2);
474 saa6752hs_chip_command(client, SAA6752HS_COMMAND_START);
476 /* readout current state */
482 i2c_master_send(client, buf, 5);
483 i2c_master_recv(client, buf2, 4);
485 /* change aspect ratio */
492 switch(h->params.vi_aspect_ratio) {
493 case V4L2_MPEG_ASPECT_16_9:
494 buf[6] = buf2[1] | 0x40;
496 case V4L2_MPEG_ASPECT_4_3:
498 buf[6] = buf2[1] & 0xBF;
504 i2c_master_send(client, buf, 9);
509 static int saa6752hs_attach(struct i2c_adapter *adap, int addr, int kind)
511 struct saa6752hs_state *h;
514 if (NULL == (h = kzalloc(sizeof(*h), GFP_KERNEL)))
516 h->client = client_template;
517 h->params = param_defaults;
518 h->client.adapter = adap;
519 h->client.addr = addr;
521 /* Assume 625 input lines */
524 i2c_set_clientdata(&h->client, h);
525 i2c_attach_client(&h->client);
527 v4l_info(&h->client,"saa6752hs: chip found @ 0x%x\n", addr<<1);
532 static int saa6752hs_probe(struct i2c_adapter *adap)
534 if (adap->class & I2C_CLASS_TV_ANALOG)
535 return i2c_probe(adap, &addr_data, saa6752hs_attach);
539 static int saa6752hs_detach(struct i2c_client *client)
541 struct saa6752hs_state *h;
543 h = i2c_get_clientdata(client);
544 i2c_detach_client(client);
550 saa6752hs_command(struct i2c_client *client, unsigned int cmd, void *arg)
552 struct saa6752hs_state *h = i2c_get_clientdata(client);
553 struct v4l2_mpeg_compression *params = arg;
557 case VIDIOC_S_MPEGCOMP:
558 if (NULL == params) {
559 /* apply settings and start encoder */
560 saa6752hs_init(client);
563 saa6752hs_set_params(client, params);
565 case VIDIOC_G_MPEGCOMP:
570 struct v4l2_format *f = arg;
572 if (h->video_format == SAA6752HS_VF_UNKNOWN)
573 h->video_format = SAA6752HS_VF_D1;
575 v4l2_format_table[h->video_format].fmt.pix.width;
577 v4l2_format_table[h->video_format].fmt.pix.height;
582 struct v4l2_format *f = arg;
584 saa6752hs_set_subsampling(client, f);
588 h->standard = *((v4l2_std_id *) arg);
598 /* ----------------------------------------------------------------------- */
600 static struct i2c_driver driver = {
604 .id = I2C_DRIVERID_SAA6752HS,
605 .attach_adapter = saa6752hs_probe,
606 .detach_client = saa6752hs_detach,
607 .command = saa6752hs_command,
610 static struct i2c_client client_template =
616 static int __init saa6752hs_init_module(void)
618 return i2c_add_driver(&driver);
621 static void __exit saa6752hs_cleanup_module(void)
623 i2c_del_driver(&driver);
626 module_init(saa6752hs_init_module);
627 module_exit(saa6752hs_cleanup_module);
630 * Overrides for Emacs so that we follow Linus's tabbing style.
631 * ---------------------------------------------------------------------------