drivers/media/i2c/saa6752hs.c

/* [<][>][^][v][top][bottom][index][help] */
This source file includes following definitions.
to_state
saa6752hs_chip_command
set_reg8
set_reg16
saa6752hs_set_bitrate
saa6752hs_try_ctrl
saa6752hs_s_ctrl
saa6752hs_init
saa6752hs_get_fmt
saa6752hs_set_fmt
saa6752hs_s_std
saa6752hs_probe
saa6752hs_remove
   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2  /*
   3     saa6752hs - i2c-driver for the saa6752hs by Philips
   4 
   5     Copyright (C) 2004 Andrew de Quincey
   6 
   7     AC-3 support:
   8 
   9     Copyright (C) 2008 Hans Verkuil <hverkuil@xs4all.nl>
  10 
  11   */
  12 
  13 #include <linux/module.h>
  14 #include <linux/kernel.h>
  15 #include <linux/string.h>
  16 #include <linux/timer.h>
  17 #include <linux/delay.h>
  18 #include <linux/errno.h>
  19 #include <linux/slab.h>
  20 #include <linux/poll.h>
  21 #include <linux/i2c.h>
  22 #include <linux/types.h>
  23 #include <linux/videodev2.h>
  24 #include <linux/init.h>
  25 #include <linux/crc32.h>
  26 #include <media/v4l2-device.h>
  27 #include <media/v4l2-ctrls.h>
  28 #include <media/v4l2-common.h>
  29 
  30 #define MPEG_VIDEO_TARGET_BITRATE_MAX  27000
  31 #define MPEG_VIDEO_MAX_BITRATE_MAX     27000
  32 #define MPEG_TOTAL_TARGET_BITRATE_MAX  27000
  33 #define MPEG_PID_MAX ((1 << 14) - 1)
  34 
  35 
  36 MODULE_DESCRIPTION("device driver for saa6752hs MPEG2 encoder");
  37 MODULE_AUTHOR("Andrew de Quincey");
  38 MODULE_LICENSE("GPL");
  39 
  40 enum saa6752hs_videoformat {
  41         SAA6752HS_VF_D1 = 0,    /* standard D1 video format: 720x576 */
  42         SAA6752HS_VF_2_3_D1 = 1,/* 2/3D1 video format: 480x576 */
  43         SAA6752HS_VF_1_2_D1 = 2,/* 1/2D1 video format: 352x576 */
  44         SAA6752HS_VF_SIF = 3,   /* SIF video format: 352x288 */
  45         SAA6752HS_VF_UNKNOWN,
  46 };
  47 
  48 struct saa6752hs_mpeg_params {
  49         /* transport streams */
  50         __u16                           ts_pid_pmt;
  51         __u16                           ts_pid_audio;
  52         __u16                           ts_pid_video;
  53         __u16                           ts_pid_pcr;
  54 
  55         /* audio */
  56         enum v4l2_mpeg_audio_encoding    au_encoding;
  57         enum v4l2_mpeg_audio_l2_bitrate  au_l2_bitrate;
  58         enum v4l2_mpeg_audio_ac3_bitrate au_ac3_bitrate;
  59 
  60         /* video */
  61         enum v4l2_mpeg_video_aspect     vi_aspect;
  62         enum v4l2_mpeg_video_bitrate_mode vi_bitrate_mode;
  63         __u32                           vi_bitrate;
  64         __u32                           vi_bitrate_peak;
  65 };
  66 
  67 static const struct v4l2_format v4l2_format_table[] =
  68 {
  69         [SAA6752HS_VF_D1] =
  70                 { .fmt = { .pix = { .width = 720, .height = 576 }}},
  71         [SAA6752HS_VF_2_3_D1] =
  72                 { .fmt = { .pix = { .width = 480, .height = 576 }}},
  73         [SAA6752HS_VF_1_2_D1] =
  74                 { .fmt = { .pix = { .width = 352, .height = 576 }}},
  75         [SAA6752HS_VF_SIF] =
  76                 { .fmt = { .pix = { .width = 352, .height = 288 }}},
  77         [SAA6752HS_VF_UNKNOWN] =
  78                 { .fmt = { .pix = { .width = 0, .height = 0}}},
  79 };
  80 
  81 struct saa6752hs_state {
  82         struct v4l2_subdev            sd;
  83         struct v4l2_ctrl_handler      hdl;
  84         struct { /* video bitrate mode control cluster */
  85                 struct v4l2_ctrl *video_bitrate_mode;
  86                 struct v4l2_ctrl *video_bitrate;
  87                 struct v4l2_ctrl *video_bitrate_peak;
  88         };
  89         u32                           revision;
  90         int                           has_ac3;
  91         struct saa6752hs_mpeg_params  params;
  92         enum saa6752hs_videoformat    video_format;
  93         v4l2_std_id                   standard;
  94 };
  95 
  96 enum saa6752hs_command {
  97         SAA6752HS_COMMAND_RESET = 0,
  98         SAA6752HS_COMMAND_STOP = 1,
  99         SAA6752HS_COMMAND_START = 2,
 100         SAA6752HS_COMMAND_PAUSE = 3,
 101         SAA6752HS_COMMAND_RECONFIGURE = 4,
 102         SAA6752HS_COMMAND_SLEEP = 5,
 103         SAA6752HS_COMMAND_RECONFIGURE_FORCE = 6,
 104 
 105         SAA6752HS_COMMAND_MAX
 106 };
 107 
 108 static inline struct saa6752hs_state *to_state(struct v4l2_subdev *sd)
 109 {
 110         return container_of(sd, struct saa6752hs_state, sd);
 111 }
 112 
 113 /* ---------------------------------------------------------------------- */
 114 
 115 static const u8 PAT[] = {
 116         0xc2, /* i2c register */
 117         0x00, /* table number for encoder */
 118 
 119         0x47, /* sync */
 120         0x40, 0x00, /* transport_error_indicator(0), payload_unit_start(1), transport_priority(0), pid(0) */
 121         0x10, /* transport_scrambling_control(00), adaptation_field_control(01), continuity_counter(0) */
 122 
 123         0x00, /* PSI pointer to start of table */
 124 
 125         0x00, /* tid(0) */
 126         0xb0, 0x0d, /* section_syntax_indicator(1), section_length(13) */
 127 
 128         0x00, 0x01, /* transport_stream_id(1) */
 129 
 130         0xc1, /* version_number(0), current_next_indicator(1) */
 131 
 132         0x00, 0x00, /* section_number(0), last_section_number(0) */
 133 
 134         0x00, 0x01, /* program_number(1) */
 135 
 136         0xe0, 0x00, /* PMT PID */
 137 
 138         0x00, 0x00, 0x00, 0x00 /* CRC32 */
 139 };
 140 
 141 static const u8 PMT[] = {
 142         0xc2, /* i2c register */
 143         0x01, /* table number for encoder */
 144 
 145         0x47, /* sync */
 146         0x40, 0x00, /* transport_error_indicator(0), payload_unit_start(1), transport_priority(0), pid */
 147         0x10, /* transport_scrambling_control(00), adaptation_field_control(01), continuity_counter(0) */
 148 
 149         0x00, /* PSI pointer to start of table */
 150 
 151         0x02, /* tid(2) */
 152         0xb0, 0x17, /* section_syntax_indicator(1), section_length(23) */
 153 
 154         0x00, 0x01, /* program_number(1) */
 155 
 156         0xc1, /* version_number(0), current_next_indicator(1) */
 157 
 158         0x00, 0x00, /* section_number(0), last_section_number(0) */
 159 
 160         0xe0, 0x00, /* PCR_PID */
 161 
 162         0xf0, 0x00, /* program_info_length(0) */
 163 
 164         0x02, 0xe0, 0x00, 0xf0, 0x00, /* video stream type(2), pid */
 165         0x04, 0xe0, 0x00, 0xf0, 0x00, /* audio stream type(4), pid */
 166 
 167         0x00, 0x00, 0x00, 0x00 /* CRC32 */
 168 };
 169 
 170 static const u8 PMT_AC3[] = {
 171         0xc2, /* i2c register */
 172         0x01, /* table number for encoder(1) */
 173         0x47, /* sync */
 174 
 175         0x40, /* transport_error_indicator(0), payload_unit_start(1), transport_priority(0) */
 176         0x10, /* PMT PID (0x0010) */
 177         0x10, /* transport_scrambling_control(00), adaptation_field_control(01), continuity_counter(0) */
 178 
 179         0x00, /* PSI pointer to start of table */
 180 
 181         0x02, /* TID (2) */
 182         0xb0, 0x1a, /* section_syntax_indicator(1), section_length(26) */
 183 
 184         0x00, 0x01, /* program_number(1) */
 185 
 186         0xc1, /* version_number(0), current_next_indicator(1) */
 187 
 188         0x00, 0x00, /* section_number(0), last_section_number(0) */
 189 
 190         0xe1, 0x04, /* PCR_PID (0x0104) */
 191 
 192         0xf0, 0x00, /* program_info_length(0) */
 193 
 194         0x02, 0xe1, 0x00, 0xf0, 0x00, /* video stream type(2), pid */
 195         0x06, 0xe1, 0x03, 0xf0, 0x03, /* audio stream type(6), pid */
 196         0x6a, /* AC3 */
 197         0x01, /* Descriptor_length(1) */
 198         0x00, /* component_type_flag(0), bsid_flag(0), mainid_flag(0), asvc_flag(0), reserved flags(0) */
 199 
 200         0xED, 0xDE, 0x2D, 0xF3 /* CRC32 BE */
 201 };
 202 
 203 static const struct saa6752hs_mpeg_params param_defaults =
 204 {
 205         .ts_pid_pmt      = 16,
 206         .ts_pid_video    = 260,
 207         .ts_pid_audio    = 256,
 208         .ts_pid_pcr      = 259,
 209 
 210         .vi_aspect       = V4L2_MPEG_VIDEO_ASPECT_4x3,
 211         .vi_bitrate      = 4000,
 212         .vi_bitrate_peak = 6000,
 213         .vi_bitrate_mode = V4L2_MPEG_VIDEO_BITRATE_MODE_VBR,
 214 
 215         .au_encoding     = V4L2_MPEG_AUDIO_ENCODING_LAYER_2,
 216         .au_l2_bitrate   = V4L2_MPEG_AUDIO_L2_BITRATE_256K,
 217         .au_ac3_bitrate  = V4L2_MPEG_AUDIO_AC3_BITRATE_256K,
 218 };
 219 
 220 /* ---------------------------------------------------------------------- */
 221 
 222 static int saa6752hs_chip_command(struct i2c_client *client,
 223                                   enum saa6752hs_command command)
 224 {
 225         unsigned char buf[3];
 226         unsigned long timeout;
 227         int status = 0;
 228 
 229         /* execute the command */
 230         switch(command) {
 231         case SAA6752HS_COMMAND_RESET:
 232                 buf[0] = 0x00;
 233                 break;
 234 
 235         case SAA6752HS_COMMAND_STOP:
 236                 buf[0] = 0x03;
 237                 break;
 238 
 239         case SAA6752HS_COMMAND_START:
 240                 buf[0] = 0x02;
 241                 break;
 242 
 243         case SAA6752HS_COMMAND_PAUSE:
 244                 buf[0] = 0x04;
 245                 break;
 246 
 247         case SAA6752HS_COMMAND_RECONFIGURE:
 248                 buf[0] = 0x05;
 249                 break;
 250 
 251         case SAA6752HS_COMMAND_SLEEP:
 252                 buf[0] = 0x06;
 253                 break;
 254 
 255         case SAA6752HS_COMMAND_RECONFIGURE_FORCE:
 256                 buf[0] = 0x07;
 257                 break;
 258 
 259         default:
 260                 return -EINVAL;
 261         }
 262 
 263         /* set it and wait for it to be so */
 264         i2c_master_send(client, buf, 1);
 265         timeout = jiffies + HZ * 3;
 266         for (;;) {
 267                 /* get the current status */
 268                 buf[0] = 0x10;
 269                 i2c_master_send(client, buf, 1);
 270                 i2c_master_recv(client, buf, 1);
 271 
 272                 if (!(buf[0] & 0x20))
 273                         break;
 274                 if (time_after(jiffies,timeout)) {
 275                         status = -ETIMEDOUT;
 276                         break;
 277                 }
 278 
 279                 msleep(10);
 280         }
 281 
 282         /* delay a bit to let encoder settle */
 283         msleep(50);
 284 
 285         return status;
 286 }
 287 
 288 
 289 static inline void set_reg8(struct i2c_client *client, uint8_t reg, uint8_t val)
 290 {
 291         u8 buf[2];
 292 
 293         buf[0] = reg;
 294         buf[1] = val;
 295         i2c_master_send(client, buf, 2);
 296 }
 297 
 298 static inline void set_reg16(struct i2c_client *client, uint8_t reg, uint16_t val)
 299 {
 300         u8 buf[3];
 301 
 302         buf[0] = reg;
 303         buf[1] = val >> 8;
 304         buf[2] = val & 0xff;
 305         i2c_master_send(client, buf, 3);
 306 }
 307 
 308 static int saa6752hs_set_bitrate(struct i2c_client *client,
 309                                  struct saa6752hs_state *h)
 310 {
 311         struct saa6752hs_mpeg_params *params = &h->params;
 312         int tot_bitrate;
 313         int is_384k;
 314 
 315         /* set the bitrate mode */
 316         set_reg8(client, 0x71,
 317                 params->vi_bitrate_mode != V4L2_MPEG_VIDEO_BITRATE_MODE_VBR);
 318 
 319         /* set the video bitrate */
 320         if (params->vi_bitrate_mode == V4L2_MPEG_VIDEO_BITRATE_MODE_VBR) {
 321                 /* set the target bitrate */
 322                 set_reg16(client, 0x80, params->vi_bitrate);
 323 
 324                 /* set the max bitrate */
 325                 set_reg16(client, 0x81, params->vi_bitrate_peak);
 326                 tot_bitrate = params->vi_bitrate_peak;
 327         } else {
 328                 /* set the target bitrate (no max bitrate for CBR) */
 329                 set_reg16(client, 0x81, params->vi_bitrate);
 330                 tot_bitrate = params->vi_bitrate;
 331         }
 332 
 333         /* set the audio encoding */
 334         set_reg8(client, 0x93,
 335                         params->au_encoding == V4L2_MPEG_AUDIO_ENCODING_AC3);
 336 
 337         /* set the audio bitrate */
 338         if (params->au_encoding == V4L2_MPEG_AUDIO_ENCODING_AC3)
 339                 is_384k = V4L2_MPEG_AUDIO_AC3_BITRATE_384K == params->au_ac3_bitrate;
 340         else
 341                 is_384k = V4L2_MPEG_AUDIO_L2_BITRATE_384K == params->au_l2_bitrate;
 342         set_reg8(client, 0x94, is_384k);
 343         tot_bitrate += is_384k ? 384 : 256;
 344 
 345         /* Note: the total max bitrate is determined by adding the video and audio
 346            bitrates together and also adding an extra 768kbit/s to stay on the
 347            safe side. If more control should be required, then an extra MPEG control
 348            should be added. */
 349         tot_bitrate += 768;
 350         if (tot_bitrate > MPEG_TOTAL_TARGET_BITRATE_MAX)
 351                 tot_bitrate = MPEG_TOTAL_TARGET_BITRATE_MAX;
 352 
 353         /* set the total bitrate */
 354         set_reg16(client, 0xb1, tot_bitrate);
 355         return 0;
 356 }
 357 
 358 static int saa6752hs_try_ctrl(struct v4l2_ctrl *ctrl)
 359 {
 360         struct saa6752hs_state *h =
 361                 container_of(ctrl->handler, struct saa6752hs_state, hdl);
 362 
 363         switch (ctrl->id) {
 364         case V4L2_CID_MPEG_VIDEO_BITRATE_MODE:
 365                 /* peak bitrate shall be >= normal bitrate */
 366                 if (ctrl->val == V4L2_MPEG_VIDEO_BITRATE_MODE_VBR &&
 367                     h->video_bitrate_peak->val < h->video_bitrate->val)
 368                         h->video_bitrate_peak->val = h->video_bitrate->val;
 369                 break;
 370         }
 371         return 0;
 372 }
 373 
 374 static int saa6752hs_s_ctrl(struct v4l2_ctrl *ctrl)
 375 {
 376         struct saa6752hs_state *h =
 377                 container_of(ctrl->handler, struct saa6752hs_state, hdl);
 378         struct saa6752hs_mpeg_params *params = &h->params;
 379 
 380         switch (ctrl->id) {
 381         case V4L2_CID_MPEG_STREAM_TYPE:
 382                 break;
 383         case V4L2_CID_MPEG_STREAM_PID_PMT:
 384                 params->ts_pid_pmt = ctrl->val;
 385                 break;
 386         case V4L2_CID_MPEG_STREAM_PID_AUDIO:
 387                 params->ts_pid_audio = ctrl->val;
 388                 break;
 389         case V4L2_CID_MPEG_STREAM_PID_VIDEO:
 390                 params->ts_pid_video = ctrl->val;
 391                 break;
 392         case V4L2_CID_MPEG_STREAM_PID_PCR:
 393                 params->ts_pid_pcr = ctrl->val;
 394                 break;
 395         case V4L2_CID_MPEG_AUDIO_ENCODING:
 396                 params->au_encoding = ctrl->val;
 397                 break;
 398         case V4L2_CID_MPEG_AUDIO_L2_BITRATE:
 399                 params->au_l2_bitrate = ctrl->val;
 400                 break;
 401         case V4L2_CID_MPEG_AUDIO_AC3_BITRATE:
 402                 params->au_ac3_bitrate = ctrl->val;
 403                 break;
 404         case V4L2_CID_MPEG_AUDIO_SAMPLING_FREQ:
 405                 break;
 406         case V4L2_CID_MPEG_VIDEO_ENCODING:
 407                 break;
 408         case V4L2_CID_MPEG_VIDEO_ASPECT:
 409                 params->vi_aspect = ctrl->val;
 410                 break;
 411         case V4L2_CID_MPEG_VIDEO_BITRATE_MODE:
 412                 params->vi_bitrate_mode = ctrl->val;
 413                 params->vi_bitrate = h->video_bitrate->val / 1000;
 414                 params->vi_bitrate_peak = h->video_bitrate_peak->val / 1000;
 415                 v4l2_ctrl_activate(h->video_bitrate_peak,
 416                                 ctrl->val == V4L2_MPEG_VIDEO_BITRATE_MODE_VBR);
 417                 break;
 418         default:
 419                 return -EINVAL;
 420         }
 421         return 0;
 422 }
 423 
 424 static int saa6752hs_init(struct v4l2_subdev *sd, u32 leading_null_bytes)
 425 {
 426         unsigned char buf[9], buf2[4];
 427         struct saa6752hs_state *h = to_state(sd);
 428         struct i2c_client *client = v4l2_get_subdevdata(sd);
 429         unsigned size;
 430         u32 crc;
 431         unsigned char localPAT[256];
 432         unsigned char localPMT[256];
 433 
 434         /* Set video format - must be done first as it resets other settings */
 435         set_reg8(client, 0x41, h->video_format);
 436 
 437         /* Set number of lines in input signal */
 438         set_reg8(client, 0x40, (h->standard & V4L2_STD_525_60) ? 1 : 0);
 439 
 440         /* set bitrate */
 441         saa6752hs_set_bitrate(client, h);
 442 
 443         /* Set GOP structure {3, 13} */
 444         set_reg16(client, 0x72, 0x030d);
 445 
 446         /* Set minimum Q-scale {4} */
 447         set_reg8(client, 0x82, 0x04);
 448 
 449         /* Set maximum Q-scale {12} */
 450         set_reg8(client, 0x83, 0x0c);
 451 
 452         /* Set Output Protocol */
 453         set_reg8(client, 0xd0, 0x81);
 454 
 455         /* Set video output stream format {TS} */
 456         set_reg8(client, 0xb0, 0x05);
 457 
 458         /* Set leading null byte for TS */
 459         set_reg16(client, 0xf6, leading_null_bytes);
 460 
 461         /* compute PAT */
 462         memcpy(localPAT, PAT, sizeof(PAT));
 463         localPAT[17] = 0xe0 | ((h->params.ts_pid_pmt >> 8) & 0x0f);
 464         localPAT[18] = h->params.ts_pid_pmt & 0xff;
 465         crc = crc32_be(~0, &localPAT[7], sizeof(PAT) - 7 - 4);
 466         localPAT[sizeof(PAT) - 4] = (crc >> 24) & 0xFF;
 467         localPAT[sizeof(PAT) - 3] = (crc >> 16) & 0xFF;
 468         localPAT[sizeof(PAT) - 2] = (crc >> 8) & 0xFF;
 469         localPAT[sizeof(PAT) - 1] = crc & 0xFF;
 470 
 471         /* compute PMT */
 472         if (h->params.au_encoding == V4L2_MPEG_AUDIO_ENCODING_AC3) {
 473                 size = sizeof(PMT_AC3);
 474                 memcpy(localPMT, PMT_AC3, size);
 475         } else {
 476                 size = sizeof(PMT);
 477                 memcpy(localPMT, PMT, size);
 478         }
 479         localPMT[3] = 0x40 | ((h->params.ts_pid_pmt >> 8) & 0x0f);
 480         localPMT[4] = h->params.ts_pid_pmt & 0xff;
 481         localPMT[15] = 0xE0 | ((h->params.ts_pid_pcr >> 8) & 0x0F);
 482         localPMT[16] = h->params.ts_pid_pcr & 0xFF;
 483         localPMT[20] = 0xE0 | ((h->params.ts_pid_video >> 8) & 0x0F);
 484         localPMT[21] = h->params.ts_pid_video & 0xFF;
 485         localPMT[25] = 0xE0 | ((h->params.ts_pid_audio >> 8) & 0x0F);
 486         localPMT[26] = h->params.ts_pid_audio & 0xFF;
 487         crc = crc32_be(~0, &localPMT[7], size - 7 - 4);
 488         localPMT[size - 4] = (crc >> 24) & 0xFF;
 489         localPMT[size - 3] = (crc >> 16) & 0xFF;
 490         localPMT[size - 2] = (crc >> 8) & 0xFF;
 491         localPMT[size - 1] = crc & 0xFF;
 492 
 493         /* Set Audio PID */
 494         set_reg16(client, 0xc1, h->params.ts_pid_audio);
 495 
 496         /* Set Video PID */
 497         set_reg16(client, 0xc0, h->params.ts_pid_video);
 498 
 499         /* Set PCR PID */
 500         set_reg16(client, 0xc4, h->params.ts_pid_pcr);
 501 
 502         /* Send SI tables */
 503         i2c_master_send(client, localPAT, sizeof(PAT));
 504         i2c_master_send(client, localPMT, size);
 505 
 506         /* mute then unmute audio. This removes buzzing artefacts */
 507         set_reg8(client, 0xa4, 1);
 508         set_reg8(client, 0xa4, 0);
 509 
 510         /* start it going */
 511         saa6752hs_chip_command(client, SAA6752HS_COMMAND_START);
 512 
 513         /* readout current state */
 514         buf[0] = 0xE1;
 515         buf[1] = 0xA7;
 516         buf[2] = 0xFE;
 517         buf[3] = 0x82;
 518         buf[4] = 0xB0;
 519         i2c_master_send(client, buf, 5);
 520         i2c_master_recv(client, buf2, 4);
 521 
 522         /* change aspect ratio */
 523         buf[0] = 0xE0;
 524         buf[1] = 0xA7;
 525         buf[2] = 0xFE;
 526         buf[3] = 0x82;
 527         buf[4] = 0xB0;
 528         buf[5] = buf2[0];
 529         switch (h->params.vi_aspect) {
 530         case V4L2_MPEG_VIDEO_ASPECT_16x9:
 531                 buf[6] = buf2[1] | 0x40;
 532                 break;
 533         case V4L2_MPEG_VIDEO_ASPECT_4x3:
 534         default:
 535                 buf[6] = buf2[1] & 0xBF;
 536                 break;
 537         }
 538         buf[7] = buf2[2];
 539         buf[8] = buf2[3];
 540         i2c_master_send(client, buf, 9);
 541 
 542         return 0;
 543 }
 544 
 545 static int saa6752hs_get_fmt(struct v4l2_subdev *sd,
 546                 struct v4l2_subdev_pad_config *cfg,
 547                 struct v4l2_subdev_format *format)
 548 {
 549         struct v4l2_mbus_framefmt *f = &format->format;
 550         struct saa6752hs_state *h = to_state(sd);
 551 
 552         if (format->pad)
 553                 return -EINVAL;
 554 
 555         if (h->video_format == SAA6752HS_VF_UNKNOWN)
 556                 h->video_format = SAA6752HS_VF_D1;
 557         f->width = v4l2_format_table[h->video_format].fmt.pix.width;
 558         f->height = v4l2_format_table[h->video_format].fmt.pix.height;
 559         f->code = MEDIA_BUS_FMT_FIXED;
 560         f->field = V4L2_FIELD_INTERLACED;
 561         f->colorspace = V4L2_COLORSPACE_SMPTE170M;
 562         return 0;
 563 }
 564 
 565 static int saa6752hs_set_fmt(struct v4l2_subdev *sd,
 566                 struct v4l2_subdev_pad_config *cfg,
 567                 struct v4l2_subdev_format *format)
 568 {
 569         struct v4l2_mbus_framefmt *f = &format->format;
 570         struct saa6752hs_state *h = to_state(sd);
 571         int dist_352, dist_480, dist_720;
 572 
 573         if (format->pad)
 574                 return -EINVAL;
 575 
 576         f->code = MEDIA_BUS_FMT_FIXED;
 577 
 578         dist_352 = abs(f->width - 352);
 579         dist_480 = abs(f->width - 480);
 580         dist_720 = abs(f->width - 720);
 581         if (dist_720 < dist_480) {
 582                 f->width = 720;
 583                 f->height = 576;
 584         } else if (dist_480 < dist_352) {
 585                 f->width = 480;
 586                 f->height = 576;
 587         } else {
 588                 f->width = 352;
 589                 if (abs(f->height - 576) < abs(f->height - 288))
 590                         f->height = 576;
 591                 else
 592                         f->height = 288;
 593         }
 594         f->field = V4L2_FIELD_INTERLACED;
 595         f->colorspace = V4L2_COLORSPACE_SMPTE170M;
 596 
 597         if (format->which == V4L2_SUBDEV_FORMAT_TRY) {
 598                 cfg->try_fmt = *f;
 599                 return 0;
 600         }
 601 
 602         /*
 603           FIXME: translate and round width/height into EMPRESS
 604           subsample type:
 605 
 606           type   |   PAL   |  NTSC
 607           ---------------------------
 608           SIF    | 352x288 | 352x240
 609           1/2 D1 | 352x576 | 352x480
 610           2/3 D1 | 480x576 | 480x480
 611           D1     | 720x576 | 720x480
 612         */
 613 
 614         if (f->code != MEDIA_BUS_FMT_FIXED)
 615                 return -EINVAL;
 616 
 617         if (f->width == 720)
 618                 h->video_format = SAA6752HS_VF_D1;
 619         else if (f->width == 480)
 620                 h->video_format = SAA6752HS_VF_2_3_D1;
 621         else if (f->height == 576)
 622                 h->video_format = SAA6752HS_VF_1_2_D1;
 623         else
 624                 h->video_format = SAA6752HS_VF_SIF;
 625         return 0;
 626 }
 627 
 628 static int saa6752hs_s_std(struct v4l2_subdev *sd, v4l2_std_id std)
 629 {
 630         struct saa6752hs_state *h = to_state(sd);
 631 
 632         h->standard = std;
 633         return 0;
 634 }
 635 
 636 /* ----------------------------------------------------------------------- */
 637 
 638 static const struct v4l2_ctrl_ops saa6752hs_ctrl_ops = {
 639         .try_ctrl = saa6752hs_try_ctrl,
 640         .s_ctrl = saa6752hs_s_ctrl,
 641 };
 642 
 643 static const struct v4l2_subdev_core_ops saa6752hs_core_ops = {
 644         .init = saa6752hs_init,
 645 };
 646 
 647 static const struct v4l2_subdev_video_ops saa6752hs_video_ops = {
 648         .s_std = saa6752hs_s_std,
 649 };
 650 
 651 static const struct v4l2_subdev_pad_ops saa6752hs_pad_ops = {
 652         .get_fmt = saa6752hs_get_fmt,
 653         .set_fmt = saa6752hs_set_fmt,
 654 };
 655 
 656 static const struct v4l2_subdev_ops saa6752hs_ops = {
 657         .core = &saa6752hs_core_ops,
 658         .video = &saa6752hs_video_ops,
 659         .pad = &saa6752hs_pad_ops,
 660 };
 661 
 662 static int saa6752hs_probe(struct i2c_client *client,
 663                 const struct i2c_device_id *id)
 664 {
 665         struct saa6752hs_state *h;
 666         struct v4l2_subdev *sd;
 667         struct v4l2_ctrl_handler *hdl;
 668         u8 addr = 0x13;
 669         u8 data[12];
 670 
 671         v4l_info(client, "chip found @ 0x%x (%s)\n",
 672                         client->addr << 1, client->adapter->name);
 673 
 674         h = devm_kzalloc(&client->dev, sizeof(*h), GFP_KERNEL);
 675         if (h == NULL)
 676                 return -ENOMEM;
 677         sd = &h->sd;
 678         v4l2_i2c_subdev_init(sd, client, &saa6752hs_ops);
 679 
 680         i2c_master_send(client, &addr, 1);
 681         i2c_master_recv(client, data, sizeof(data));
 682         h->revision = (data[8] << 8) | data[9];
 683         h->has_ac3 = 0;
 684         if (h->revision == 0x0206) {
 685                 h->has_ac3 = 1;
 686                 v4l_info(client, "supports AC-3\n");
 687         }
 688         h->params = param_defaults;
 689 
 690         hdl = &h->hdl;
 691         v4l2_ctrl_handler_init(hdl, 14);
 692         v4l2_ctrl_new_std_menu(hdl, &saa6752hs_ctrl_ops,
 693                 V4L2_CID_MPEG_AUDIO_ENCODING,
 694                 h->has_ac3 ? V4L2_MPEG_AUDIO_ENCODING_AC3 :
 695                         V4L2_MPEG_AUDIO_ENCODING_LAYER_2,
 696                 0x0d, V4L2_MPEG_AUDIO_ENCODING_LAYER_2);
 697 
 698         v4l2_ctrl_new_std_menu(hdl, &saa6752hs_ctrl_ops,
 699                 V4L2_CID_MPEG_AUDIO_L2_BITRATE,
 700                 V4L2_MPEG_AUDIO_L2_BITRATE_384K,
 701                 ~((1 << V4L2_MPEG_AUDIO_L2_BITRATE_256K) |
 702                   (1 << V4L2_MPEG_AUDIO_L2_BITRATE_384K)),
 703                 V4L2_MPEG_AUDIO_L2_BITRATE_256K);
 704 
 705         if (h->has_ac3)
 706                 v4l2_ctrl_new_std_menu(hdl, &saa6752hs_ctrl_ops,
 707                         V4L2_CID_MPEG_AUDIO_AC3_BITRATE,
 708                         V4L2_MPEG_AUDIO_AC3_BITRATE_384K,
 709                         ~((1 << V4L2_MPEG_AUDIO_AC3_BITRATE_256K) |
 710                           (1 << V4L2_MPEG_AUDIO_AC3_BITRATE_384K)),
 711                         V4L2_MPEG_AUDIO_AC3_BITRATE_256K);
 712 
 713         v4l2_ctrl_new_std_menu(hdl, &saa6752hs_ctrl_ops,
 714                 V4L2_CID_MPEG_AUDIO_SAMPLING_FREQ,
 715                 V4L2_MPEG_AUDIO_SAMPLING_FREQ_48000,
 716                 ~(1 << V4L2_MPEG_AUDIO_SAMPLING_FREQ_48000),
 717                 V4L2_MPEG_AUDIO_SAMPLING_FREQ_48000);
 718 
 719         v4l2_ctrl_new_std_menu(hdl, &saa6752hs_ctrl_ops,
 720                 V4L2_CID_MPEG_VIDEO_ENCODING,
 721                 V4L2_MPEG_VIDEO_ENCODING_MPEG_2,
 722                 ~(1 << V4L2_MPEG_VIDEO_ENCODING_MPEG_2),
 723                 V4L2_MPEG_VIDEO_ENCODING_MPEG_2);
 724 
 725         v4l2_ctrl_new_std_menu(hdl, &saa6752hs_ctrl_ops,
 726                 V4L2_CID_MPEG_VIDEO_ASPECT,
 727                 V4L2_MPEG_VIDEO_ASPECT_16x9, 0x01,
 728                 V4L2_MPEG_VIDEO_ASPECT_4x3);
 729 
 730         h->video_bitrate_peak = v4l2_ctrl_new_std(hdl, &saa6752hs_ctrl_ops,
 731                 V4L2_CID_MPEG_VIDEO_BITRATE_PEAK,
 732                 1000000, 27000000, 1000, 8000000);
 733 
 734         v4l2_ctrl_new_std_menu(hdl, &saa6752hs_ctrl_ops,
 735                 V4L2_CID_MPEG_STREAM_TYPE,
 736                 V4L2_MPEG_STREAM_TYPE_MPEG2_TS,
 737                 ~(1 << V4L2_MPEG_STREAM_TYPE_MPEG2_TS),
 738                 V4L2_MPEG_STREAM_TYPE_MPEG2_TS);
 739 
 740         h->video_bitrate_mode = v4l2_ctrl_new_std_menu(hdl, &saa6752hs_ctrl_ops,
 741                 V4L2_CID_MPEG_VIDEO_BITRATE_MODE,
 742                 V4L2_MPEG_VIDEO_BITRATE_MODE_CBR, 0,
 743                 V4L2_MPEG_VIDEO_BITRATE_MODE_VBR);
 744         h->video_bitrate = v4l2_ctrl_new_std(hdl, &saa6752hs_ctrl_ops,
 745                 V4L2_CID_MPEG_VIDEO_BITRATE, 1000000, 27000000, 1000, 6000000);
 746         v4l2_ctrl_new_std(hdl, &saa6752hs_ctrl_ops,
 747                 V4L2_CID_MPEG_STREAM_PID_PMT, 0, (1 << 14) - 1, 1, 16);
 748         v4l2_ctrl_new_std(hdl, &saa6752hs_ctrl_ops,
 749                 V4L2_CID_MPEG_STREAM_PID_AUDIO, 0, (1 << 14) - 1, 1, 260);
 750         v4l2_ctrl_new_std(hdl, &saa6752hs_ctrl_ops,
 751                 V4L2_CID_MPEG_STREAM_PID_VIDEO, 0, (1 << 14) - 1, 1, 256);
 752         v4l2_ctrl_new_std(hdl, &saa6752hs_ctrl_ops,
 753                 V4L2_CID_MPEG_STREAM_PID_PCR, 0, (1 << 14) - 1, 1, 259);
 754         sd->ctrl_handler = hdl;
 755         if (hdl->error) {
 756                 int err = hdl->error;
 757 
 758                 v4l2_ctrl_handler_free(hdl);
 759                 return err;
 760         }
 761         v4l2_ctrl_cluster(3, &h->video_bitrate_mode);
 762         v4l2_ctrl_handler_setup(hdl);
 763         h->standard = 0; /* Assume 625 input lines */
 764         return 0;
 765 }
 766 
 767 static int saa6752hs_remove(struct i2c_client *client)
 768 {
 769         struct v4l2_subdev *sd = i2c_get_clientdata(client);
 770 
 771         v4l2_device_unregister_subdev(sd);
 772         v4l2_ctrl_handler_free(&to_state(sd)->hdl);
 773         return 0;
 774 }
 775 
 776 static const struct i2c_device_id saa6752hs_id[] = {
 777         { "saa6752hs", 0 },
 778         { }
 779 };
 780 MODULE_DEVICE_TABLE(i2c, saa6752hs_id);
 781 
 782 static struct i2c_driver saa6752hs_driver = {
 783         .driver = {
 784                 .name   = "saa6752hs",
 785         },
 786         .probe          = saa6752hs_probe,
 787         .remove         = saa6752hs_remove,
 788         .id_table       = saa6752hs_id,
 789 };
 790 
 791 module_i2c_driver(saa6752hs_driver);
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root/drivers/media/i2c/saa6752hs.c

DEFINITIONS
