Linux Kernel  3.7.1
 All Data Structures Namespaces Files Functions Variables Typedefs Enumerations Enumerator Macros Groups Pages
saa6752hs.c
Go to the documentation of this file.
1  /*
2  saa6752hs - i2c-driver for the saa6752hs by Philips
3 
4  Copyright (C) 2004 Andrew de Quincey
5 
6  AC-3 support:
7 
8  Copyright (C) 2008 Hans Verkuil <[email protected]>
9 
10  This program is free software; you can redistribute it and/or modify
11  it under the terms of the GNU General Public License vs published by
12  the Free Software Foundation; either version 2 of the License, or
13  (at your option) any later version.
14 
15  This program is distributed in the hope that it will be useful,
16  but WITHOUT ANY WARRANTY; without even the implied warranty of
17  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18  GNU General Public License for more details.
19 
20  You should have received a copy of the GNU General Public License
21  along with this program; if not, write to the Free Software
22  Foundation, Inc., 675 Mvss Ave, Cambridge, MA 02139, USA.
23  */
24 
25 #include <linux/module.h>
26 #include <linux/kernel.h>
27 #include <linux/string.h>
28 #include <linux/timer.h>
29 #include <linux/delay.h>
30 #include <linux/errno.h>
31 #include <linux/slab.h>
32 #include <linux/poll.h>
33 #include <linux/i2c.h>
34 #include <linux/types.h>
35 #include <linux/videodev2.h>
36 #include <media/v4l2-device.h>
37 #include <media/v4l2-common.h>
38 #include <media/v4l2-chip-ident.h>
39 #include <linux/init.h>
40 #include <linux/crc32.h>
41 
42 #define MPEG_VIDEO_TARGET_BITRATE_MAX 27000
43 #define MPEG_VIDEO_MAX_BITRATE_MAX 27000
44 #define MPEG_TOTAL_TARGET_BITRATE_MAX 27000
45 #define MPEG_PID_MAX ((1 << 14) - 1)
46 
47 
48 MODULE_DESCRIPTION("device driver for saa6752hs MPEG2 encoder");
49 MODULE_AUTHOR("Andrew de Quincey");
50 MODULE_LICENSE("GPL");
51 
52 enum saa6752hs_videoformat {
53  SAA6752HS_VF_D1 = 0, /* standard D1 video format: 720x576 */
54  SAA6752HS_VF_2_3_D1 = 1,/* 2/3D1 video format: 480x576 */
55  SAA6752HS_VF_1_2_D1 = 2,/* 1/2D1 video format: 352x576 */
56  SAA6752HS_VF_SIF = 3, /* SIF video format: 352x288 */
57  SAA6752HS_VF_UNKNOWN,
58 };
59 
60 struct saa6752hs_mpeg_params {
61  /* transport streams */
62  __u16 ts_pid_pmt;
63  __u16 ts_pid_audio;
64  __u16 ts_pid_video;
65  __u16 ts_pid_pcr;
66 
67  /* audio */
68  enum v4l2_mpeg_audio_encoding au_encoding;
69  enum v4l2_mpeg_audio_l2_bitrate au_l2_bitrate;
70  enum v4l2_mpeg_audio_ac3_bitrate au_ac3_bitrate;
71 
72  /* video */
73  enum v4l2_mpeg_video_aspect vi_aspect;
74  enum v4l2_mpeg_video_bitrate_mode vi_bitrate_mode;
75  __u32 vi_bitrate;
76  __u32 vi_bitrate_peak;
77 };
78 
79 static const struct v4l2_format v4l2_format_table[] =
80 {
81  [SAA6752HS_VF_D1] =
82  { .fmt = { .pix = { .width = 720, .height = 576 }}},
83  [SAA6752HS_VF_2_3_D1] =
84  { .fmt = { .pix = { .width = 480, .height = 576 }}},
85  [SAA6752HS_VF_1_2_D1] =
86  { .fmt = { .pix = { .width = 352, .height = 576 }}},
87  [SAA6752HS_VF_SIF] =
88  { .fmt = { .pix = { .width = 352, .height = 288 }}},
89  [SAA6752HS_VF_UNKNOWN] =
90  { .fmt = { .pix = { .width = 0, .height = 0}}},
91 };
92 
93 struct saa6752hs_state {
94  struct v4l2_subdev sd;
95  int chip;
96  u32 revision;
97  int has_ac3;
98  struct saa6752hs_mpeg_params params;
99  enum saa6752hs_videoformat video_format;
100  v4l2_std_id standard;
101 };
102 
103 enum saa6752hs_command {
104  SAA6752HS_COMMAND_RESET = 0,
105  SAA6752HS_COMMAND_STOP = 1,
106  SAA6752HS_COMMAND_START = 2,
107  SAA6752HS_COMMAND_PAUSE = 3,
108  SAA6752HS_COMMAND_RECONFIGURE = 4,
109  SAA6752HS_COMMAND_SLEEP = 5,
110  SAA6752HS_COMMAND_RECONFIGURE_FORCE = 6,
111 
112  SAA6752HS_COMMAND_MAX
113 };
114 
115 static inline struct saa6752hs_state *to_state(struct v4l2_subdev *sd)
116 {
117  return container_of(sd, struct saa6752hs_state, sd);
118 }
119 
120 /* ---------------------------------------------------------------------- */
121 
122 static u8 PAT[] = {
123  0xc2, /* i2c register */
124  0x00, /* table number for encoder */
125 
126  0x47, /* sync */
127  0x40, 0x00, /* transport_error_indicator(0), payload_unit_start(1), transport_priority(0), pid(0) */
128  0x10, /* transport_scrambling_control(00), adaptation_field_control(01), continuity_counter(0) */
129 
130  0x00, /* PSI pointer to start of table */
131 
132  0x00, /* tid(0) */
133  0xb0, 0x0d, /* section_syntax_indicator(1), section_length(13) */
134 
135  0x00, 0x01, /* transport_stream_id(1) */
136 
137  0xc1, /* version_number(0), current_next_indicator(1) */
138 
139  0x00, 0x00, /* section_number(0), last_section_number(0) */
140 
141  0x00, 0x01, /* program_number(1) */
142 
143  0xe0, 0x00, /* PMT PID */
144 
145  0x00, 0x00, 0x00, 0x00 /* CRC32 */
146 };
147 
148 static u8 PMT[] = {
149  0xc2, /* i2c register */
150  0x01, /* table number for encoder */
151 
152  0x47, /* sync */
153  0x40, 0x00, /* transport_error_indicator(0), payload_unit_start(1), transport_priority(0), pid */
154  0x10, /* transport_scrambling_control(00), adaptation_field_control(01), continuity_counter(0) */
155 
156  0x00, /* PSI pointer to start of table */
157 
158  0x02, /* tid(2) */
159  0xb0, 0x17, /* section_syntax_indicator(1), section_length(23) */
160 
161  0x00, 0x01, /* program_number(1) */
162 
163  0xc1, /* version_number(0), current_next_indicator(1) */
164 
165  0x00, 0x00, /* section_number(0), last_section_number(0) */
166 
167  0xe0, 0x00, /* PCR_PID */
168 
169  0xf0, 0x00, /* program_info_length(0) */
170 
171  0x02, 0xe0, 0x00, 0xf0, 0x00, /* video stream type(2), pid */
172  0x04, 0xe0, 0x00, 0xf0, 0x00, /* audio stream type(4), pid */
173 
174  0x00, 0x00, 0x00, 0x00 /* CRC32 */
175 };
176 
177 static u8 PMT_AC3[] = {
178  0xc2, /* i2c register */
179  0x01, /* table number for encoder(1) */
180  0x47, /* sync */
181 
182  0x40, /* transport_error_indicator(0), payload_unit_start(1), transport_priority(0) */
183  0x10, /* PMT PID (0x0010) */
184  0x10, /* transport_scrambling_control(00), adaptation_field_control(01), continuity_counter(0) */
185 
186  0x00, /* PSI pointer to start of table */
187 
188  0x02, /* TID (2) */
189  0xb0, 0x1a, /* section_syntax_indicator(1), section_length(26) */
190 
191  0x00, 0x01, /* program_number(1) */
192 
193  0xc1, /* version_number(0), current_next_indicator(1) */
194 
195  0x00, 0x00, /* section_number(0), last_section_number(0) */
196 
197  0xe1, 0x04, /* PCR_PID (0x0104) */
198 
199  0xf0, 0x00, /* program_info_length(0) */
200 
201  0x02, 0xe1, 0x00, 0xf0, 0x00, /* video stream type(2), pid */
202  0x06, 0xe1, 0x03, 0xf0, 0x03, /* audio stream type(6), pid */
203  0x6a, /* AC3 */
204  0x01, /* Descriptor_length(1) */
205  0x00, /* component_type_flag(0), bsid_flag(0), mainid_flag(0), asvc_flag(0), reserved flags(0) */
206 
207  0xED, 0xDE, 0x2D, 0xF3 /* CRC32 BE */
208 };
209 
210 static struct saa6752hs_mpeg_params param_defaults =
211 {
212  .ts_pid_pmt = 16,
213  .ts_pid_video = 260,
214  .ts_pid_audio = 256,
215  .ts_pid_pcr = 259,
216 
217  .vi_aspect = V4L2_MPEG_VIDEO_ASPECT_4x3,
218  .vi_bitrate = 4000,
219  .vi_bitrate_peak = 6000,
220  .vi_bitrate_mode = V4L2_MPEG_VIDEO_BITRATE_MODE_VBR,
221 
222  .au_encoding = V4L2_MPEG_AUDIO_ENCODING_LAYER_2,
223  .au_l2_bitrate = V4L2_MPEG_AUDIO_L2_BITRATE_256K,
224  .au_ac3_bitrate = V4L2_MPEG_AUDIO_AC3_BITRATE_256K,
225 };
226 
227 /* ---------------------------------------------------------------------- */
228 
229 static int saa6752hs_chip_command(struct i2c_client *client,
230  enum saa6752hs_command command)
231 {
232  unsigned char buf[3];
233  unsigned long timeout;
234  int status = 0;
235 
236  /* execute the command */
237  switch(command) {
238  case SAA6752HS_COMMAND_RESET:
239  buf[0] = 0x00;
240  break;
241 
242  case SAA6752HS_COMMAND_STOP:
243  buf[0] = 0x03;
244  break;
245 
246  case SAA6752HS_COMMAND_START:
247  buf[0] = 0x02;
248  break;
249 
250  case SAA6752HS_COMMAND_PAUSE:
251  buf[0] = 0x04;
252  break;
253 
254  case SAA6752HS_COMMAND_RECONFIGURE:
255  buf[0] = 0x05;
256  break;
257 
258  case SAA6752HS_COMMAND_SLEEP:
259  buf[0] = 0x06;
260  break;
261 
262  case SAA6752HS_COMMAND_RECONFIGURE_FORCE:
263  buf[0] = 0x07;
264  break;
265 
266  default:
267  return -EINVAL;
268  }
269 
270  /* set it and wait for it to be so */
271  i2c_master_send(client, buf, 1);
272  timeout = jiffies + HZ * 3;
273  for (;;) {
274  /* get the current status */
275  buf[0] = 0x10;
276  i2c_master_send(client, buf, 1);
277  i2c_master_recv(client, buf, 1);
278 
279  if (!(buf[0] & 0x20))
280  break;
281  if (time_after(jiffies,timeout)) {
282  status = -ETIMEDOUT;
283  break;
284  }
285 
286  msleep(10);
287  }
288 
289  /* delay a bit to let encoder settle */
290  msleep(50);
291 
292  return status;
293 }
294 
295 
296 static inline void set_reg8(struct i2c_client *client, uint8_t reg, uint8_t val)
297 {
298  u8 buf[2];
299 
300  buf[0] = reg;
301  buf[1] = val;
302  i2c_master_send(client, buf, 2);
303 }
304 
305 static inline void set_reg16(struct i2c_client *client, uint8_t reg, uint16_t val)
306 {
307  u8 buf[3];
308 
309  buf[0] = reg;
310  buf[1] = val >> 8;
311  buf[2] = val & 0xff;
312  i2c_master_send(client, buf, 3);
313 }
314 
315 static int saa6752hs_set_bitrate(struct i2c_client *client,
316  struct saa6752hs_state *h)
317 {
318  struct saa6752hs_mpeg_params *params = &h->params;
319  int tot_bitrate;
320  int is_384k;
321 
322  /* set the bitrate mode */
323  set_reg8(client, 0x71,
324  params->vi_bitrate_mode != V4L2_MPEG_VIDEO_BITRATE_MODE_VBR);
325 
326  /* set the video bitrate */
327  if (params->vi_bitrate_mode == V4L2_MPEG_VIDEO_BITRATE_MODE_VBR) {
328  /* set the target bitrate */
329  set_reg16(client, 0x80, params->vi_bitrate);
330 
331  /* set the max bitrate */
332  set_reg16(client, 0x81, params->vi_bitrate_peak);
333  tot_bitrate = params->vi_bitrate_peak;
334  } else {
335  /* set the target bitrate (no max bitrate for CBR) */
336  set_reg16(client, 0x81, params->vi_bitrate);
337  tot_bitrate = params->vi_bitrate;
338  }
339 
340  /* set the audio encoding */
341  set_reg8(client, 0x93,
342  params->au_encoding == V4L2_MPEG_AUDIO_ENCODING_AC3);
343 
344  /* set the audio bitrate */
345  if (params->au_encoding == V4L2_MPEG_AUDIO_ENCODING_AC3)
346  is_384k = V4L2_MPEG_AUDIO_AC3_BITRATE_384K == params->au_ac3_bitrate;
347  else
348  is_384k = V4L2_MPEG_AUDIO_L2_BITRATE_384K == params->au_l2_bitrate;
349  set_reg8(client, 0x94, is_384k);
350  tot_bitrate += is_384k ? 384 : 256;
351 
352  /* Note: the total max bitrate is determined by adding the video and audio
353  bitrates together and also adding an extra 768kbit/s to stay on the
354  safe side. If more control should be required, then an extra MPEG control
355  should be added. */
356  tot_bitrate += 768;
357  if (tot_bitrate > MPEG_TOTAL_TARGET_BITRATE_MAX)
358  tot_bitrate = MPEG_TOTAL_TARGET_BITRATE_MAX;
359 
360  /* set the total bitrate */
361  set_reg16(client, 0xb1, tot_bitrate);
362  return 0;
363 }
364 
365 
366 static int get_ctrl(int has_ac3, struct saa6752hs_mpeg_params *params,
367  struct v4l2_ext_control *ctrl)
368 {
369  switch (ctrl->id) {
370  case V4L2_CID_MPEG_STREAM_TYPE:
371  ctrl->value = V4L2_MPEG_STREAM_TYPE_MPEG2_TS;
372  break;
373  case V4L2_CID_MPEG_STREAM_PID_PMT:
374  ctrl->value = params->ts_pid_pmt;
375  break;
376  case V4L2_CID_MPEG_STREAM_PID_AUDIO:
377  ctrl->value = params->ts_pid_audio;
378  break;
379  case V4L2_CID_MPEG_STREAM_PID_VIDEO:
380  ctrl->value = params->ts_pid_video;
381  break;
382  case V4L2_CID_MPEG_STREAM_PID_PCR:
383  ctrl->value = params->ts_pid_pcr;
384  break;
385  case V4L2_CID_MPEG_AUDIO_ENCODING:
386  ctrl->value = params->au_encoding;
387  break;
388  case V4L2_CID_MPEG_AUDIO_L2_BITRATE:
389  ctrl->value = params->au_l2_bitrate;
390  break;
391  case V4L2_CID_MPEG_AUDIO_AC3_BITRATE:
392  if (!has_ac3)
393  return -EINVAL;
394  ctrl->value = params->au_ac3_bitrate;
395  break;
396  case V4L2_CID_MPEG_AUDIO_SAMPLING_FREQ:
397  ctrl->value = V4L2_MPEG_AUDIO_SAMPLING_FREQ_48000;
398  break;
399  case V4L2_CID_MPEG_VIDEO_ENCODING:
400  ctrl->value = V4L2_MPEG_VIDEO_ENCODING_MPEG_2;
401  break;
402  case V4L2_CID_MPEG_VIDEO_ASPECT:
403  ctrl->value = params->vi_aspect;
404  break;
405  case V4L2_CID_MPEG_VIDEO_BITRATE:
406  ctrl->value = params->vi_bitrate * 1000;
407  break;
408  case V4L2_CID_MPEG_VIDEO_BITRATE_PEAK:
409  ctrl->value = params->vi_bitrate_peak * 1000;
410  break;
411  case V4L2_CID_MPEG_VIDEO_BITRATE_MODE:
412  ctrl->value = params->vi_bitrate_mode;
413  break;
414  default:
415  return -EINVAL;
416  }
417  return 0;
418 }
419 
420 static int handle_ctrl(int has_ac3, struct saa6752hs_mpeg_params *params,
421  struct v4l2_ext_control *ctrl, int set)
422 {
423  int old = 0, new;
424 
425  new = ctrl->value;
426  switch (ctrl->id) {
427  case V4L2_CID_MPEG_STREAM_TYPE:
428  old = V4L2_MPEG_STREAM_TYPE_MPEG2_TS;
429  if (set && new != old)
430  return -ERANGE;
431  new = old;
432  break;
433  case V4L2_CID_MPEG_STREAM_PID_PMT:
434  old = params->ts_pid_pmt;
435  if (set && new > MPEG_PID_MAX)
436  return -ERANGE;
437  if (new > MPEG_PID_MAX)
438  new = MPEG_PID_MAX;
439  params->ts_pid_pmt = new;
440  break;
441  case V4L2_CID_MPEG_STREAM_PID_AUDIO:
442  old = params->ts_pid_audio;
443  if (set && new > MPEG_PID_MAX)
444  return -ERANGE;
445  if (new > MPEG_PID_MAX)
446  new = MPEG_PID_MAX;
447  params->ts_pid_audio = new;
448  break;
449  case V4L2_CID_MPEG_STREAM_PID_VIDEO:
450  old = params->ts_pid_video;
451  if (set && new > MPEG_PID_MAX)
452  return -ERANGE;
453  if (new > MPEG_PID_MAX)
454  new = MPEG_PID_MAX;
455  params->ts_pid_video = new;
456  break;
457  case V4L2_CID_MPEG_STREAM_PID_PCR:
458  old = params->ts_pid_pcr;
459  if (set && new > MPEG_PID_MAX)
460  return -ERANGE;
461  if (new > MPEG_PID_MAX)
462  new = MPEG_PID_MAX;
463  params->ts_pid_pcr = new;
464  break;
465  case V4L2_CID_MPEG_AUDIO_ENCODING:
466  old = params->au_encoding;
467  if (set && new != V4L2_MPEG_AUDIO_ENCODING_LAYER_2 &&
468  (!has_ac3 || new != V4L2_MPEG_AUDIO_ENCODING_AC3))
469  return -ERANGE;
470  params->au_encoding = new;
471  break;
472  case V4L2_CID_MPEG_AUDIO_L2_BITRATE:
473  old = params->au_l2_bitrate;
474  if (set && new != V4L2_MPEG_AUDIO_L2_BITRATE_256K &&
475  new != V4L2_MPEG_AUDIO_L2_BITRATE_384K)
476  return -ERANGE;
477  if (new <= V4L2_MPEG_AUDIO_L2_BITRATE_256K)
478  new = V4L2_MPEG_AUDIO_L2_BITRATE_256K;
479  else
480  new = V4L2_MPEG_AUDIO_L2_BITRATE_384K;
481  params->au_l2_bitrate = new;
482  break;
483  case V4L2_CID_MPEG_AUDIO_AC3_BITRATE:
484  if (!has_ac3)
485  return -EINVAL;
486  old = params->au_ac3_bitrate;
487  if (set && new != V4L2_MPEG_AUDIO_AC3_BITRATE_256K &&
488  new != V4L2_MPEG_AUDIO_AC3_BITRATE_384K)
489  return -ERANGE;
490  if (new <= V4L2_MPEG_AUDIO_AC3_BITRATE_256K)
491  new = V4L2_MPEG_AUDIO_AC3_BITRATE_256K;
492  else
493  new = V4L2_MPEG_AUDIO_AC3_BITRATE_384K;
494  params->au_ac3_bitrate = new;
495  break;
496  case V4L2_CID_MPEG_AUDIO_SAMPLING_FREQ:
497  old = V4L2_MPEG_AUDIO_SAMPLING_FREQ_48000;
498  if (set && new != old)
499  return -ERANGE;
500  new = old;
501  break;
502  case V4L2_CID_MPEG_VIDEO_ENCODING:
503  old = V4L2_MPEG_VIDEO_ENCODING_MPEG_2;
504  if (set && new != old)
505  return -ERANGE;
506  new = old;
507  break;
508  case V4L2_CID_MPEG_VIDEO_ASPECT:
509  old = params->vi_aspect;
510  if (set && new != V4L2_MPEG_VIDEO_ASPECT_16x9 &&
511  new != V4L2_MPEG_VIDEO_ASPECT_4x3)
512  return -ERANGE;
513  if (new != V4L2_MPEG_VIDEO_ASPECT_16x9)
514  new = V4L2_MPEG_VIDEO_ASPECT_4x3;
515  params->vi_aspect = new;
516  break;
517  case V4L2_CID_MPEG_VIDEO_BITRATE:
518  old = params->vi_bitrate * 1000;
519  new = 1000 * (new / 1000);
520  if (set && new > MPEG_VIDEO_TARGET_BITRATE_MAX * 1000)
521  return -ERANGE;
522  if (new > MPEG_VIDEO_TARGET_BITRATE_MAX * 1000)
523  new = MPEG_VIDEO_TARGET_BITRATE_MAX * 1000;
524  params->vi_bitrate = new / 1000;
525  break;
526  case V4L2_CID_MPEG_VIDEO_BITRATE_PEAK:
527  old = params->vi_bitrate_peak * 1000;
528  new = 1000 * (new / 1000);
529  if (set && new > MPEG_VIDEO_TARGET_BITRATE_MAX * 1000)
530  return -ERANGE;
531  if (new > MPEG_VIDEO_TARGET_BITRATE_MAX * 1000)
532  new = MPEG_VIDEO_TARGET_BITRATE_MAX * 1000;
533  params->vi_bitrate_peak = new / 1000;
534  break;
535  case V4L2_CID_MPEG_VIDEO_BITRATE_MODE:
536  old = params->vi_bitrate_mode;
537  params->vi_bitrate_mode = new;
538  break;
539  default:
540  return -EINVAL;
541  }
542  ctrl->value = new;
543  return 0;
544 }
545 
546 
547 static int saa6752hs_queryctrl(struct v4l2_subdev *sd, struct v4l2_queryctrl *qctrl)
548 {
549  struct saa6752hs_state *h = to_state(sd);
550  struct saa6752hs_mpeg_params *params = &h->params;
551  int err;
552 
553  switch (qctrl->id) {
554  case V4L2_CID_MPEG_AUDIO_ENCODING:
555  return v4l2_ctrl_query_fill(qctrl,
556  V4L2_MPEG_AUDIO_ENCODING_LAYER_2,
557  h->has_ac3 ? V4L2_MPEG_AUDIO_ENCODING_AC3 :
558  V4L2_MPEG_AUDIO_ENCODING_LAYER_2,
559  1, V4L2_MPEG_AUDIO_ENCODING_LAYER_2);
560 
561  case V4L2_CID_MPEG_AUDIO_L2_BITRATE:
562  return v4l2_ctrl_query_fill(qctrl,
563  V4L2_MPEG_AUDIO_L2_BITRATE_256K,
564  V4L2_MPEG_AUDIO_L2_BITRATE_384K, 1,
565  V4L2_MPEG_AUDIO_L2_BITRATE_256K);
566 
567  case V4L2_CID_MPEG_AUDIO_AC3_BITRATE:
568  if (!h->has_ac3)
569  return -EINVAL;
570  return v4l2_ctrl_query_fill(qctrl,
571  V4L2_MPEG_AUDIO_AC3_BITRATE_256K,
572  V4L2_MPEG_AUDIO_AC3_BITRATE_384K, 1,
573  V4L2_MPEG_AUDIO_AC3_BITRATE_256K);
574 
575  case V4L2_CID_MPEG_AUDIO_SAMPLING_FREQ:
576  return v4l2_ctrl_query_fill(qctrl,
577  V4L2_MPEG_AUDIO_SAMPLING_FREQ_48000,
578  V4L2_MPEG_AUDIO_SAMPLING_FREQ_48000, 1,
579  V4L2_MPEG_AUDIO_SAMPLING_FREQ_48000);
580 
581  case V4L2_CID_MPEG_VIDEO_ENCODING:
582  return v4l2_ctrl_query_fill(qctrl,
583  V4L2_MPEG_VIDEO_ENCODING_MPEG_2,
584  V4L2_MPEG_VIDEO_ENCODING_MPEG_2, 1,
585  V4L2_MPEG_VIDEO_ENCODING_MPEG_2);
586 
587  case V4L2_CID_MPEG_VIDEO_ASPECT:
588  return v4l2_ctrl_query_fill(qctrl,
589  V4L2_MPEG_VIDEO_ASPECT_4x3,
590  V4L2_MPEG_VIDEO_ASPECT_16x9, 1,
591  V4L2_MPEG_VIDEO_ASPECT_4x3);
592 
593  case V4L2_CID_MPEG_VIDEO_BITRATE_PEAK:
594  err = v4l2_ctrl_query_fill(qctrl, 0, 27000000, 1, 8000000);
595  if (err == 0 &&
596  params->vi_bitrate_mode ==
597  V4L2_MPEG_VIDEO_BITRATE_MODE_CBR)
598  qctrl->flags |= V4L2_CTRL_FLAG_INACTIVE;
599  return err;
600 
601  case V4L2_CID_MPEG_STREAM_TYPE:
602  return v4l2_ctrl_query_fill(qctrl,
603  V4L2_MPEG_STREAM_TYPE_MPEG2_TS,
604  V4L2_MPEG_STREAM_TYPE_MPEG2_TS, 1,
605  V4L2_MPEG_STREAM_TYPE_MPEG2_TS);
606 
607  case V4L2_CID_MPEG_VIDEO_BITRATE_MODE:
608  return v4l2_ctrl_query_fill(qctrl,
609  V4L2_MPEG_VIDEO_BITRATE_MODE_VBR,
610  V4L2_MPEG_VIDEO_BITRATE_MODE_CBR, 1,
611  V4L2_MPEG_VIDEO_BITRATE_MODE_VBR);
612  case V4L2_CID_MPEG_VIDEO_BITRATE:
613  return v4l2_ctrl_query_fill(qctrl, 0, 27000000, 1, 6000000);
614  case V4L2_CID_MPEG_STREAM_PID_PMT:
615  return v4l2_ctrl_query_fill(qctrl, 0, (1 << 14) - 1, 1, 16);
616  case V4L2_CID_MPEG_STREAM_PID_AUDIO:
617  return v4l2_ctrl_query_fill(qctrl, 0, (1 << 14) - 1, 1, 260);
618  case V4L2_CID_MPEG_STREAM_PID_VIDEO:
619  return v4l2_ctrl_query_fill(qctrl, 0, (1 << 14) - 1, 1, 256);
620  case V4L2_CID_MPEG_STREAM_PID_PCR:
621  return v4l2_ctrl_query_fill(qctrl, 0, (1 << 14) - 1, 1, 259);
622 
623  default:
624  break;
625  }
626  return -EINVAL;
627 }
628 
629 static int saa6752hs_querymenu(struct v4l2_subdev *sd, struct v4l2_querymenu *qmenu)
630 {
631  static const u32 mpeg_audio_encoding[] = {
632  V4L2_MPEG_AUDIO_ENCODING_LAYER_2,
633  V4L2_CTRL_MENU_IDS_END
634  };
635  static const u32 mpeg_audio_ac3_encoding[] = {
636  V4L2_MPEG_AUDIO_ENCODING_LAYER_2,
637  V4L2_MPEG_AUDIO_ENCODING_AC3,
638  V4L2_CTRL_MENU_IDS_END
639  };
640  static u32 mpeg_audio_l2_bitrate[] = {
641  V4L2_MPEG_AUDIO_L2_BITRATE_256K,
642  V4L2_MPEG_AUDIO_L2_BITRATE_384K,
643  V4L2_CTRL_MENU_IDS_END
644  };
645  static u32 mpeg_audio_ac3_bitrate[] = {
646  V4L2_MPEG_AUDIO_AC3_BITRATE_256K,
647  V4L2_MPEG_AUDIO_AC3_BITRATE_384K,
648  V4L2_CTRL_MENU_IDS_END
649  };
650  struct saa6752hs_state *h = to_state(sd);
651  struct v4l2_queryctrl qctrl;
652  int err;
653 
654  qctrl.id = qmenu->id;
655  err = saa6752hs_queryctrl(sd, &qctrl);
656  if (err)
657  return err;
658  switch (qmenu->id) {
659  case V4L2_CID_MPEG_AUDIO_L2_BITRATE:
660  return v4l2_ctrl_query_menu_valid_items(qmenu,
661  mpeg_audio_l2_bitrate);
662  case V4L2_CID_MPEG_AUDIO_AC3_BITRATE:
663  if (!h->has_ac3)
664  return -EINVAL;
665  return v4l2_ctrl_query_menu_valid_items(qmenu,
666  mpeg_audio_ac3_bitrate);
667  case V4L2_CID_MPEG_AUDIO_ENCODING:
668  return v4l2_ctrl_query_menu_valid_items(qmenu,
669  h->has_ac3 ? mpeg_audio_ac3_encoding :
670  mpeg_audio_encoding);
671  }
672  return v4l2_ctrl_query_menu(qmenu, &qctrl, NULL);
673 }
674 
675 static int saa6752hs_init(struct v4l2_subdev *sd, u32 leading_null_bytes)
676 {
677  unsigned char buf[9], buf2[4];
678  struct saa6752hs_state *h = to_state(sd);
679  struct i2c_client *client = v4l2_get_subdevdata(sd);
680  unsigned size;
681  u32 crc;
682  unsigned char localPAT[256];
683  unsigned char localPMT[256];
684 
685  /* Set video format - must be done first as it resets other settings */
686  set_reg8(client, 0x41, h->video_format);
687 
688  /* Set number of lines in input signal */
689  set_reg8(client, 0x40, (h->standard & V4L2_STD_525_60) ? 1 : 0);
690 
691  /* set bitrate */
692  saa6752hs_set_bitrate(client, h);
693 
694  /* Set GOP structure {3, 13} */
695  set_reg16(client, 0x72, 0x030d);
696 
697  /* Set minimum Q-scale {4} */
698  set_reg8(client, 0x82, 0x04);
699 
700  /* Set maximum Q-scale {12} */
701  set_reg8(client, 0x83, 0x0c);
702 
703  /* Set Output Protocol */
704  set_reg8(client, 0xd0, 0x81);
705 
706  /* Set video output stream format {TS} */
707  set_reg8(client, 0xb0, 0x05);
708 
709  /* Set leading null byte for TS */
710  set_reg16(client, 0xf6, leading_null_bytes);
711 
712  /* compute PAT */
713  memcpy(localPAT, PAT, sizeof(PAT));
714  localPAT[17] = 0xe0 | ((h->params.ts_pid_pmt >> 8) & 0x0f);
715  localPAT[18] = h->params.ts_pid_pmt & 0xff;
716  crc = crc32_be(~0, &localPAT[7], sizeof(PAT) - 7 - 4);
717  localPAT[sizeof(PAT) - 4] = (crc >> 24) & 0xFF;
718  localPAT[sizeof(PAT) - 3] = (crc >> 16) & 0xFF;
719  localPAT[sizeof(PAT) - 2] = (crc >> 8) & 0xFF;
720  localPAT[sizeof(PAT) - 1] = crc & 0xFF;
721 
722  /* compute PMT */
723  if (h->params.au_encoding == V4L2_MPEG_AUDIO_ENCODING_AC3) {
724  size = sizeof(PMT_AC3);
725  memcpy(localPMT, PMT_AC3, size);
726  } else {
727  size = sizeof(PMT);
728  memcpy(localPMT, PMT, size);
729  }
730  localPMT[3] = 0x40 | ((h->params.ts_pid_pmt >> 8) & 0x0f);
731  localPMT[4] = h->params.ts_pid_pmt & 0xff;
732  localPMT[15] = 0xE0 | ((h->params.ts_pid_pcr >> 8) & 0x0F);
733  localPMT[16] = h->params.ts_pid_pcr & 0xFF;
734  localPMT[20] = 0xE0 | ((h->params.ts_pid_video >> 8) & 0x0F);
735  localPMT[21] = h->params.ts_pid_video & 0xFF;
736  localPMT[25] = 0xE0 | ((h->params.ts_pid_audio >> 8) & 0x0F);
737  localPMT[26] = h->params.ts_pid_audio & 0xFF;
738  crc = crc32_be(~0, &localPMT[7], size - 7 - 4);
739  localPMT[size - 4] = (crc >> 24) & 0xFF;
740  localPMT[size - 3] = (crc >> 16) & 0xFF;
741  localPMT[size - 2] = (crc >> 8) & 0xFF;
742  localPMT[size - 1] = crc & 0xFF;
743 
744  /* Set Audio PID */
745  set_reg16(client, 0xc1, h->params.ts_pid_audio);
746 
747  /* Set Video PID */
748  set_reg16(client, 0xc0, h->params.ts_pid_video);
749 
750  /* Set PCR PID */
751  set_reg16(client, 0xc4, h->params.ts_pid_pcr);
752 
753  /* Send SI tables */
754  i2c_master_send(client, localPAT, sizeof(PAT));
755  i2c_master_send(client, localPMT, size);
756 
757  /* mute then unmute audio. This removes buzzing artefacts */
758  set_reg8(client, 0xa4, 1);
759  set_reg8(client, 0xa4, 0);
760 
761  /* start it going */
762  saa6752hs_chip_command(client, SAA6752HS_COMMAND_START);
763 
764  /* readout current state */
765  buf[0] = 0xE1;
766  buf[1] = 0xA7;
767  buf[2] = 0xFE;
768  buf[3] = 0x82;
769  buf[4] = 0xB0;
770  i2c_master_send(client, buf, 5);
771  i2c_master_recv(client, buf2, 4);
772 
773  /* change aspect ratio */
774  buf[0] = 0xE0;
775  buf[1] = 0xA7;
776  buf[2] = 0xFE;
777  buf[3] = 0x82;
778  buf[4] = 0xB0;
779  buf[5] = buf2[0];
780  switch (h->params.vi_aspect) {
781  case V4L2_MPEG_VIDEO_ASPECT_16x9:
782  buf[6] = buf2[1] | 0x40;
783  break;
784  case V4L2_MPEG_VIDEO_ASPECT_4x3:
785  default:
786  buf[6] = buf2[1] & 0xBF;
787  break;
788  }
789  buf[7] = buf2[2];
790  buf[8] = buf2[3];
791  i2c_master_send(client, buf, 9);
792 
793  return 0;
794 }
795 
796 static int saa6752hs_do_ext_ctrls(struct v4l2_subdev *sd, struct v4l2_ext_controls *ctrls, int set)
797 {
798  struct saa6752hs_state *h = to_state(sd);
799  struct saa6752hs_mpeg_params params;
800  int i;
801 
802  if (ctrls->ctrl_class != V4L2_CTRL_CLASS_MPEG)
803  return -EINVAL;
804 
805  params = h->params;
806  for (i = 0; i < ctrls->count; i++) {
807  int err = handle_ctrl(h->has_ac3, &params, ctrls->controls + i, set);
808 
809  if (err) {
810  ctrls->error_idx = i;
811  return err;
812  }
813  }
814  if (set)
815  h->params = params;
816  return 0;
817 }
818 
819 static int saa6752hs_s_ext_ctrls(struct v4l2_subdev *sd, struct v4l2_ext_controls *ctrls)
820 {
821  return saa6752hs_do_ext_ctrls(sd, ctrls, 1);
822 }
823 
824 static int saa6752hs_try_ext_ctrls(struct v4l2_subdev *sd, struct v4l2_ext_controls *ctrls)
825 {
826  return saa6752hs_do_ext_ctrls(sd, ctrls, 0);
827 }
828 
829 static int saa6752hs_g_ext_ctrls(struct v4l2_subdev *sd, struct v4l2_ext_controls *ctrls)
830 {
831  struct saa6752hs_state *h = to_state(sd);
832  int i;
833 
834  if (ctrls->ctrl_class != V4L2_CTRL_CLASS_MPEG)
835  return -EINVAL;
836 
837  for (i = 0; i < ctrls->count; i++) {
838  int err = get_ctrl(h->has_ac3, &h->params, ctrls->controls + i);
839 
840  if (err) {
841  ctrls->error_idx = i;
842  return err;
843  }
844  }
845  return 0;
846 }
847 
848 static int saa6752hs_g_mbus_fmt(struct v4l2_subdev *sd, struct v4l2_mbus_framefmt *f)
849 {
850  struct saa6752hs_state *h = to_state(sd);
851 
852  if (h->video_format == SAA6752HS_VF_UNKNOWN)
853  h->video_format = SAA6752HS_VF_D1;
854  f->width = v4l2_format_table[h->video_format].fmt.pix.width;
855  f->height = v4l2_format_table[h->video_format].fmt.pix.height;
856  f->code = V4L2_MBUS_FMT_FIXED;
857  f->field = V4L2_FIELD_INTERLACED;
858  f->colorspace = V4L2_COLORSPACE_SMPTE170M;
859  return 0;
860 }
861 
862 static int saa6752hs_s_mbus_fmt(struct v4l2_subdev *sd, struct v4l2_mbus_framefmt *f)
863 {
864  struct saa6752hs_state *h = to_state(sd);
865  int dist_352, dist_480, dist_720;
866 
867  if (f->code != V4L2_MBUS_FMT_FIXED)
868  return -EINVAL;
869 
870  /*
871  FIXME: translate and round width/height into EMPRESS
872  subsample type:
873 
874  type | PAL | NTSC
875  ---------------------------
876  SIF | 352x288 | 352x240
877  1/2 D1 | 352x576 | 352x480
878  2/3 D1 | 480x576 | 480x480
879  D1 | 720x576 | 720x480
880  */
881 
882  dist_352 = abs(f->width - 352);
883  dist_480 = abs(f->width - 480);
884  dist_720 = abs(f->width - 720);
885  if (dist_720 < dist_480) {
886  f->width = 720;
887  f->height = 576;
888  h->video_format = SAA6752HS_VF_D1;
889  } else if (dist_480 < dist_352) {
890  f->width = 480;
891  f->height = 576;
892  h->video_format = SAA6752HS_VF_2_3_D1;
893  } else {
894  f->width = 352;
895  if (abs(f->height - 576) <
896  abs(f->height - 288)) {
897  f->height = 576;
898  h->video_format = SAA6752HS_VF_1_2_D1;
899  } else {
900  f->height = 288;
901  h->video_format = SAA6752HS_VF_SIF;
902  }
903  }
904  f->field = V4L2_FIELD_INTERLACED;
905  f->colorspace = V4L2_COLORSPACE_SMPTE170M;
906  return 0;
907 }
908 
909 static int saa6752hs_s_std(struct v4l2_subdev *sd, v4l2_std_id std)
910 {
911  struct saa6752hs_state *h = to_state(sd);
912 
913  h->standard = std;
914  return 0;
915 }
916 
917 static int saa6752hs_g_chip_ident(struct v4l2_subdev *sd, struct v4l2_dbg_chip_ident *chip)
918 {
919  struct i2c_client *client = v4l2_get_subdevdata(sd);
920  struct saa6752hs_state *h = to_state(sd);
921 
922  return v4l2_chip_ident_i2c_client(client,
923  chip, h->chip, h->revision);
924 }
925 
926 /* ----------------------------------------------------------------------- */
927 
928 static const struct v4l2_subdev_core_ops saa6752hs_core_ops = {
929  .g_chip_ident = saa6752hs_g_chip_ident,
930  .init = saa6752hs_init,
931  .queryctrl = saa6752hs_queryctrl,
932  .querymenu = saa6752hs_querymenu,
933  .g_ext_ctrls = saa6752hs_g_ext_ctrls,
934  .s_ext_ctrls = saa6752hs_s_ext_ctrls,
935  .try_ext_ctrls = saa6752hs_try_ext_ctrls,
936  .s_std = saa6752hs_s_std,
937 };
938 
939 static const struct v4l2_subdev_video_ops saa6752hs_video_ops = {
940  .s_mbus_fmt = saa6752hs_s_mbus_fmt,
941  .g_mbus_fmt = saa6752hs_g_mbus_fmt,
942 };
943 
944 static const struct v4l2_subdev_ops saa6752hs_ops = {
945  .core = &saa6752hs_core_ops,
946  .video = &saa6752hs_video_ops,
947 };
948 
949 static int saa6752hs_probe(struct i2c_client *client,
950  const struct i2c_device_id *id)
951 {
952  struct saa6752hs_state *h = kzalloc(sizeof(*h), GFP_KERNEL);
953  struct v4l2_subdev *sd;
954  u8 addr = 0x13;
955  u8 data[12];
956 
957  v4l_info(client, "chip found @ 0x%x (%s)\n",
958  client->addr << 1, client->adapter->name);
959  if (h == NULL)
960  return -ENOMEM;
961  sd = &h->sd;
962  v4l2_i2c_subdev_init(sd, client, &saa6752hs_ops);
963 
964  i2c_master_send(client, &addr, 1);
965  i2c_master_recv(client, data, sizeof(data));
966  h->chip = V4L2_IDENT_SAA6752HS;
967  h->revision = (data[8] << 8) | data[9];
968  h->has_ac3 = 0;
969  if (h->revision == 0x0206) {
970  h->chip = V4L2_IDENT_SAA6752HS_AC3;
971  h->has_ac3 = 1;
972  v4l_info(client, "support AC-3\n");
973  }
974  h->params = param_defaults;
975  h->standard = 0; /* Assume 625 input lines */
976  return 0;
977 }
978 
979 static int saa6752hs_remove(struct i2c_client *client)
980 {
981  struct v4l2_subdev *sd = i2c_get_clientdata(client);
982 
983  v4l2_device_unregister_subdev(sd);
984  kfree(to_state(sd));
985  return 0;
986 }
987 
988 static const struct i2c_device_id saa6752hs_id[] = {
989  { "saa6752hs", 0 },
990  { }
991 };
992 MODULE_DEVICE_TABLE(i2c, saa6752hs_id);
993 
994 static struct i2c_driver saa6752hs_driver = {
995  .driver = {
996  .owner = THIS_MODULE,
997  .name = "saa6752hs",
998  },
999  .probe = saa6752hs_probe,
1000  .remove = saa6752hs_remove,
1001  .id_table = saa6752hs_id,
1002 };
1003 
1004 module_i2c_driver(saa6752hs_driver);
1005 
1006 /*
1007  * Overrides for Emacs so that we follow Linus's tabbing style.
1008  * ---------------------------------------------------------------------------
1009  * Local variables:
1010  * c-basic-offset: 8
1011  * End:
1012  */
Generated on Thu Jan 10 2013 13:48:31 for Linux Kernel by   doxygen 1.8.2