drivers/media/video/saa7134/saa6752hs.c

   1 #include <linux/module.h>
   2 #include <linux/kernel.h>
   3 #include <linux/string.h>
   4 #include <linux/timer.h>
   5 #include <linux/delay.h>
   6 #include <linux/errno.h>
   7 #include <linux/slab.h>
   8 #include <linux/poll.h>
   9 #include <linux/i2c.h>
  10 #include <linux/types.h>
  11 #include <linux/videodev2.h>
  12 #include <media/v4l2-common.h>
  13 #include <linux/init.h>
  14 #include <linux/crc32.h>
  15
  16
  17 #define MPEG_VIDEO_TARGET_BITRATE_MAX  27000
  18 #define MPEG_VIDEO_MAX_BITRATE_MAX     27000
  19 #define MPEG_TOTAL_TARGET_BITRATE_MAX  27000
  20 #define MPEG_PID_MAX ((1 << 14) - 1)
  21
  22 /* Addresses to scan */
  23 static unsigned short normal_i2c[] = {0x20, I2C_CLIENT_END};
  24 I2C_CLIENT_INSMOD;
  25
  26 MODULE_DESCRIPTION("device driver for saa6752hs MPEG2 encoder");
  27 MODULE_AUTHOR("Andrew de Quincey");
  28 MODULE_LICENSE("GPL");
  29
  30 static struct i2c_driver driver;
  31 static struct i2c_client client_template;
  32
  33 enum saa6752hs_videoformat {
  34         SAA6752HS_VF_D1 = 0,    /* standard D1 video format: 720x576 */
  35         SAA6752HS_VF_2_3_D1 = 1,/* 2/3D1 video format: 480x576 */
  36         SAA6752HS_VF_1_2_D1 = 2,/* 1/2D1 video format: 352x576 */
  37         SAA6752HS_VF_SIF = 3,   /* SIF video format: 352x288 */
  38         SAA6752HS_VF_UNKNOWN,
  39 };
  40
  41 struct saa6752hs_mpeg_params {
  42         /* transport streams */
  43         __u16                           ts_pid_pmt;
  44         __u16                           ts_pid_audio;
  45         __u16                           ts_pid_video;
  46         __u16                           ts_pid_pcr;
  47
  48         /* audio */
  49         enum v4l2_mpeg_audio_l2_bitrate au_l2_bitrate;
  50
  51         /* video */
  52         enum v4l2_mpeg_video_aspect     vi_aspect;
  53         enum v4l2_mpeg_video_bitrate_mode vi_bitrate_mode;
  54         __u32                           vi_bitrate;
  55         __u32                           vi_bitrate_peak;
  56 };
  57
  58 static const struct v4l2_format v4l2_format_table[] =
  59 {
  60         [SAA6752HS_VF_D1] =
  61                 { .fmt = { .pix = { .width = 720, .height = 576 }}},
  62         [SAA6752HS_VF_2_3_D1] =
  63                 { .fmt = { .pix = { .width = 480, .height = 576 }}},
  64         [SAA6752HS_VF_1_2_D1] =
  65                 { .fmt = { .pix = { .width = 352, .height = 576 }}},
  66         [SAA6752HS_VF_SIF] =
  67                 { .fmt = { .pix = { .width = 352, .height = 288 }}},
  68         [SAA6752HS_VF_UNKNOWN] =
  69                 { .fmt = { .pix = { .width = 0, .height = 0}}},
  70 };
  71
  72 struct saa6752hs_state {
  73         struct i2c_client             client;
  74         struct saa6752hs_mpeg_params  params;
  75         enum saa6752hs_videoformat    video_format;
  76         v4l2_std_id                   standard;
  77 };
  78
  79 enum saa6752hs_command {
  80         SAA6752HS_COMMAND_RESET = 0,
  81         SAA6752HS_COMMAND_STOP = 1,
  82         SAA6752HS_COMMAND_START = 2,
  83         SAA6752HS_COMMAND_PAUSE = 3,
  84         SAA6752HS_COMMAND_RECONFIGURE = 4,
  85         SAA6752HS_COMMAND_SLEEP = 5,
  86         SAA6752HS_COMMAND_RECONFIGURE_FORCE = 6,
  87
  88         SAA6752HS_COMMAND_MAX
  89 };
  90
  91 /* ---------------------------------------------------------------------- */
  92
  93 static u8 PAT[] = {
  94         0xc2, /* i2c register */
  95         0x00, /* table number for encoder */
  96
  97         0x47, /* sync */
  98         0x40, 0x00, /* transport_error_indicator(0), payload_unit_start(1), transport_priority(0), pid(0) */
  99         0x10, /* transport_scrambling_control(00), adaptation_field_control(01), continuity_counter(0) */
 100
 101         0x00, /* PSI pointer to start of table */
 102
 103         0x00, /* tid(0) */
 104         0xb0, 0x0d, /* section_syntax_indicator(1), section_length(13) */
 105
 106         0x00, 0x01, /* transport_stream_id(1) */
 107
 108         0xc1, /* version_number(0), current_next_indicator(1) */
 109
 110         0x00, 0x00, /* section_number(0), last_section_number(0) */
 111
 112         0x00, 0x01, /* program_number(1) */
 113
 114         0xe0, 0x00, /* PMT PID */
 115
 116         0x00, 0x00, 0x00, 0x00 /* CRC32 */
 117 };
 118
 119 static u8 PMT[] = {
 120         0xc2, /* i2c register */
 121         0x01, /* table number for encoder */
 122
 123         0x47, /* sync */
 124         0x40, 0x00, /* transport_error_indicator(0), payload_unit_start(1), transport_priority(0), pid */
 125         0x10, /* transport_scrambling_control(00), adaptation_field_control(01), continuity_counter(0) */
 126
 127         0x00, /* PSI pointer to start of table */
 128
 129         0x02, /* tid(2) */
 130         0xb0, 0x17, /* section_syntax_indicator(1), section_length(23) */
 131
 132         0x00, 0x01, /* program_number(1) */
 133
 134         0xc1, /* version_number(0), current_next_indicator(1) */
 135
 136         0x00, 0x00, /* section_number(0), last_section_number(0) */
 137
 138         0xe0, 0x00, /* PCR_PID */
 139
 140         0xf0, 0x00, /* program_info_length(0) */
 141
 142         0x02, 0xe0, 0x00, 0xf0, 0x00, /* video stream type(2), pid */
 143         0x04, 0xe0, 0x00, 0xf0, 0x00, /* audio stream type(4), pid */
 144
 145         0x00, 0x00, 0x00, 0x00 /* CRC32 */
 146 };
 147
 148 static struct saa6752hs_mpeg_params param_defaults =
 149 {
 150         .ts_pid_pmt      = 16,
 151         .ts_pid_video    = 260,
 152         .ts_pid_audio    = 256,
 153         .ts_pid_pcr      = 259,
 154
 155         .vi_aspect       = V4L2_MPEG_VIDEO_ASPECT_4x3,
 156         .vi_bitrate      = 4000,
 157         .vi_bitrate_peak = 6000,
 158         .vi_bitrate_mode = V4L2_MPEG_VIDEO_BITRATE_MODE_VBR,
 159
 160         .au_l2_bitrate   = V4L2_MPEG_AUDIO_L2_BITRATE_256K,
 161 };
 162
 163 /* ---------------------------------------------------------------------- */
 164
 165 static int saa6752hs_chip_command(struct i2c_client* client,
 166                                   enum saa6752hs_command command)
 167 {
 168         unsigned char buf[3];
 169         unsigned long timeout;
 170         int status = 0;
 171
 172         /* execute the command */
 173         switch(command) {
 174         case SAA6752HS_COMMAND_RESET:
 175                 buf[0] = 0x00;
 176                 break;
 177
 178         case SAA6752HS_COMMAND_STOP:
 179                 buf[0] = 0x03;
 180                 break;
 181
 182         case SAA6752HS_COMMAND_START:
 183                 buf[0] = 0x02;
 184                 break;
 185
 186         case SAA6752HS_COMMAND_PAUSE:
 187                 buf[0] = 0x04;
 188                 break;
 189
 190         case SAA6752HS_COMMAND_RECONFIGURE:
 191                 buf[0] = 0x05;
 192                 break;
 193
 194         case SAA6752HS_COMMAND_SLEEP:
 195                 buf[0] = 0x06;
 196                 break;
 197
 198         case SAA6752HS_COMMAND_RECONFIGURE_FORCE:
 199                 buf[0] = 0x07;
 200                 break;
 201
 202         default:
 203                 return -EINVAL;
 204         }
 205
 206         /* set it and wait for it to be so */
 207         i2c_master_send(client, buf, 1);
 208         timeout = jiffies + HZ * 3;
 209         for (;;) {
 210                 /* get the current status */
 211                 buf[0] = 0x10;
 212                 i2c_master_send(client, buf, 1);
 213                 i2c_master_recv(client, buf, 1);
 214
 215                 if (!(buf[0] & 0x20))
 216                         break;
 217                 if (time_after(jiffies,timeout)) {
 218                         status = -ETIMEDOUT;
 219                         break;
 220                 }
 221
 222                 msleep(10);
 223         }
 224
 225         /* delay a bit to let encoder settle */
 226         msleep(50);
 227
 228         return status;
 229 }
 230
 231
 232 static int saa6752hs_set_bitrate(struct i2c_client* client,
 233                                  struct saa6752hs_mpeg_params* params)
 234 {
 235         u8 buf[3];
 236         int tot_bitrate;
 237
 238         /* set the bitrate mode */
 239         buf[0] = 0x71;
 240         buf[1] = (params->vi_bitrate_mode == V4L2_MPEG_VIDEO_BITRATE_MODE_VBR) ? 0 : 1;
 241         i2c_master_send(client, buf, 2);
 242
 243         /* set the video bitrate */
 244         if (params->vi_bitrate_mode == V4L2_MPEG_VIDEO_BITRATE_MODE_VBR) {
 245                 /* set the target bitrate */
 246                 buf[0] = 0x80;
 247                 buf[1] = params->vi_bitrate >> 8;
 248                 buf[2] = params->vi_bitrate & 0xff;
 249                 i2c_master_send(client, buf, 3);
 250
 251                 /* set the max bitrate */
 252                 buf[0] = 0x81;
 253                 buf[1] = params->vi_bitrate_peak >> 8;
 254                 buf[2] = params->vi_bitrate_peak & 0xff;
 255                 i2c_master_send(client, buf, 3);
 256                 tot_bitrate = params->vi_bitrate_peak;
 257         } else {
 258                 /* set the target bitrate (no max bitrate for CBR) */
 259                 buf[0] = 0x81;
 260                 buf[1] = params->vi_bitrate >> 8;
 261                 buf[2] = params->vi_bitrate & 0xff;
 262                 i2c_master_send(client, buf, 3);
 263                 tot_bitrate = params->vi_bitrate;
 264         }
 265
 266         /* set the audio bitrate */
 267         buf[0] = 0x94;
 268         buf[1] = (V4L2_MPEG_AUDIO_L2_BITRATE_256K == params->au_l2_bitrate) ? 0 : 1;
 269         i2c_master_send(client, buf, 2);
 270         tot_bitrate += (V4L2_MPEG_AUDIO_L2_BITRATE_256K == params->au_l2_bitrate) ? 256 : 384;
 271
 272         /* Note: the total max bitrate is determined by adding the video and audio
 273            bitrates together and also adding an extra 768kbit/s to stay on the
 274            safe side. If more control should be required, then an extra MPEG control
 275            should be added. */
 276         tot_bitrate += 768;
 277         if (tot_bitrate > MPEG_TOTAL_TARGET_BITRATE_MAX)
 278                 tot_bitrate = MPEG_TOTAL_TARGET_BITRATE_MAX;
 279
 280         /* set the total bitrate */
 281         buf[0] = 0xb1;
 282         buf[1] = tot_bitrate >> 8;
 283         buf[2] = tot_bitrate & 0xff;
 284         i2c_master_send(client, buf, 3);
 285
 286         return 0;
 287 }
 288
 289 static void saa6752hs_set_subsampling(struct i2c_client* client,
 290                                       struct v4l2_format* f)
 291 {
 292         struct saa6752hs_state *h = i2c_get_clientdata(client);
 293         int dist_352, dist_480, dist_720;
 294
 295         /*
 296           FIXME: translate and round width/height into EMPRESS
 297           subsample type:
 298
 299           type   |   PAL   |  NTSC
 300           ---------------------------
 301           SIF    | 352x288 | 352x240
 302           1/2 D1 | 352x576 | 352x480
 303           2/3 D1 | 480x576 | 480x480
 304           D1     | 720x576 | 720x480
 305         */
 306
 307         dist_352 = abs(f->fmt.pix.width - 352);
 308         dist_480 = abs(f->fmt.pix.width - 480);
 309         dist_720 = abs(f->fmt.pix.width - 720);
 310         if (dist_720 < dist_480) {
 311                 f->fmt.pix.width = 720;
 312                 f->fmt.pix.height = 576;
 313                 h->video_format = SAA6752HS_VF_D1;
 314         }
 315         else if (dist_480 < dist_352) {
 316                 f->fmt.pix.width = 480;
 317                 f->fmt.pix.height = 576;
 318                 h->video_format = SAA6752HS_VF_2_3_D1;
 319         }
 320         else {
 321                 f->fmt.pix.width = 352;
 322                 if (abs(f->fmt.pix.height - 576) <
 323                     abs(f->fmt.pix.height - 288)) {
 324                         f->fmt.pix.height = 576;
 325                         h->video_format = SAA6752HS_VF_1_2_D1;
 326                 }
 327                 else {
 328                         f->fmt.pix.height = 288;
 329                         h->video_format = SAA6752HS_VF_SIF;
 330                 }
 331         }
 332 }
 333
 334
 335 static int handle_ctrl(struct saa6752hs_mpeg_params *params,
 336                 struct v4l2_ext_control *ctrl, unsigned int cmd)
 337 {
 338         int old = 0, new;
 339         int set = (cmd == VIDIOC_S_EXT_CTRLS);
 340
 341         new = ctrl->value;
 342         switch (ctrl->id) {
 343                 case V4L2_CID_MPEG_STREAM_TYPE:
 344                         old = V4L2_MPEG_STREAM_TYPE_MPEG2_TS;
 345                         if (set && new != old)
 346                                 return -ERANGE;
 347                         new = old;
 348                         break;
 349                 case V4L2_CID_MPEG_STREAM_PID_PMT:
 350                         old = params->ts_pid_pmt;
 351                         if (set && new > MPEG_PID_MAX)
 352                                 return -ERANGE;
 353                         if (new > MPEG_PID_MAX)
 354                                 new = MPEG_PID_MAX;
 355                         params->ts_pid_pmt = new;
 356                         break;
 357                 case V4L2_CID_MPEG_STREAM_PID_AUDIO:
 358                         old = params->ts_pid_audio;
 359                         if (set && new > MPEG_PID_MAX)
 360                                 return -ERANGE;
 361                         if (new > MPEG_PID_MAX)
 362                                 new = MPEG_PID_MAX;
 363                         params->ts_pid_audio = new;
 364                         break;
 365                 case V4L2_CID_MPEG_STREAM_PID_VIDEO:
 366                         old = params->ts_pid_video;
 367                         if (set && new > MPEG_PID_MAX)
 368                                 return -ERANGE;
 369                         if (new > MPEG_PID_MAX)
 370                                 new = MPEG_PID_MAX;
 371                         params->ts_pid_video = new;
 372                         break;
 373                 case V4L2_CID_MPEG_STREAM_PID_PCR:
 374                         old = params->ts_pid_pcr;
 375                         if (set && new > MPEG_PID_MAX)
 376                                 return -ERANGE;
 377                         if (new > MPEG_PID_MAX)
 378                                 new = MPEG_PID_MAX;
 379                         params->ts_pid_pcr = new;
 380                         break;
 381                 case V4L2_CID_MPEG_AUDIO_ENCODING:
 382                         old = V4L2_MPEG_AUDIO_ENCODING_LAYER_2;
 383                         if (set && new != old)
 384                                 return -ERANGE;
 385                         new = old;
 386                         break;
 387                 case V4L2_CID_MPEG_AUDIO_L2_BITRATE:
 388                         old = params->au_l2_bitrate;
 389                         if (set && new != V4L2_MPEG_AUDIO_L2_BITRATE_256K &&
 390                                    new != V4L2_MPEG_AUDIO_L2_BITRATE_384K)
 391                                 return -ERANGE;
 392                         if (new <= V4L2_MPEG_AUDIO_L2_BITRATE_256K)
 393                                 new = V4L2_MPEG_AUDIO_L2_BITRATE_256K;
 394                         else
 395                                 new = V4L2_MPEG_AUDIO_L2_BITRATE_384K;
 396                         params->au_l2_bitrate = new;
 397                         break;
 398                 case V4L2_CID_MPEG_AUDIO_SAMPLING_FREQ:
 399                         old = V4L2_MPEG_AUDIO_SAMPLING_FREQ_48000;
 400                         if (set && new != old)
 401                                 return -ERANGE;
 402                         new = old;
 403                         break;
 404                 case V4L2_CID_MPEG_VIDEO_ENCODING:
 405                         old = V4L2_MPEG_VIDEO_ENCODING_MPEG_2;
 406                         if (set && new != old)
 407                                 return -ERANGE;
 408                         new = old;
 409                         break;
 410                 case V4L2_CID_MPEG_VIDEO_ASPECT:
 411                         old = params->vi_aspect;
 412                         if (set && new != V4L2_MPEG_VIDEO_ASPECT_16x9 &&
 413                                    new != V4L2_MPEG_VIDEO_ASPECT_4x3)
 414                                 return -ERANGE;
 415                         if (new != V4L2_MPEG_VIDEO_ASPECT_16x9)
 416                                 new = V4L2_MPEG_VIDEO_ASPECT_4x3;
 417                         params->vi_aspect = new;
 418                         break;
 419                 case V4L2_CID_MPEG_VIDEO_BITRATE:
 420                         old = params->vi_bitrate * 1000;
 421                         new = 1000 * (new / 1000);
 422                         if (set && new > MPEG_VIDEO_TARGET_BITRATE_MAX * 1000)
 423                                 return -ERANGE;
 424                         if (new > MPEG_VIDEO_TARGET_BITRATE_MAX * 1000)
 425                                 new = MPEG_VIDEO_TARGET_BITRATE_MAX * 1000;
 426                         params->vi_bitrate = new / 1000;
 427                         break;
 428                 case V4L2_CID_MPEG_VIDEO_BITRATE_PEAK:
 429                         old = params->vi_bitrate_peak * 1000;
 430                         new = 1000 * (new / 1000);
 431                         if (set && new > MPEG_VIDEO_TARGET_BITRATE_MAX * 1000)
 432                                 return -ERANGE;
 433                         if (new > MPEG_VIDEO_TARGET_BITRATE_MAX * 1000)
 434                                 new = MPEG_VIDEO_TARGET_BITRATE_MAX * 1000;
 435                         params->vi_bitrate_peak = new / 1000;
 436                         break;
 437                 case V4L2_CID_MPEG_VIDEO_BITRATE_MODE:
 438                         old = params->vi_bitrate_mode;
 439                         params->vi_bitrate_mode = new;
 440                         break;
 441                 default:
 442                         return -EINVAL;
 443         }
 444         if (cmd == VIDIOC_G_EXT_CTRLS)
 445                 ctrl->value = old;
 446         else
 447                 ctrl->value = new;
 448         return 0;
 449 }
 450
 451 static int saa6752hs_init(struct i2c_client* client)
 452 {
 453         unsigned char buf[9], buf2[4];
 454         struct saa6752hs_state *h;
 455         u32 crc;
 456         unsigned char localPAT[256];
 457         unsigned char localPMT[256];
 458
 459         h = i2c_get_clientdata(client);
 460
 461         /* Set video format - must be done first as it resets other settings */
 462         buf[0] = 0x41;
 463         buf[1] = h->video_format;
 464         i2c_master_send(client, buf, 2);
 465
 466         /* Set number of lines in input signal */
 467         buf[0] = 0x40;
 468         buf[1] = 0x00;
 469         if (h->standard & V4L2_STD_525_60)
 470                 buf[1] = 0x01;
 471         i2c_master_send(client, buf, 2);
 472
 473         /* set bitrate */
 474         saa6752hs_set_bitrate(client, &h->params);
 475
 476         /* Set GOP structure {3, 13} */
 477         buf[0] = 0x72;
 478         buf[1] = 0x03;
 479         buf[2] = 0x0D;
 480         i2c_master_send(client,buf,3);
 481
 482         /* Set minimum Q-scale {4} */
 483         buf[0] = 0x82;
 484         buf[1] = 0x04;
 485         i2c_master_send(client,buf,2);
 486
 487         /* Set maximum Q-scale {12} */
 488         buf[0] = 0x83;
 489         buf[1] = 0x0C;
 490         i2c_master_send(client,buf,2);
 491
 492         /* Set Output Protocol */
 493         buf[0] = 0xD0;
 494         buf[1] = 0x81;
 495         i2c_master_send(client,buf,2);
 496
 497         /* Set video output stream format {TS} */
 498         buf[0] = 0xB0;
 499         buf[1] = 0x05;
 500         i2c_master_send(client,buf,2);
 501
 502         /* compute PAT */
 503         memcpy(localPAT, PAT, sizeof(PAT));
 504         localPAT[17] = 0xe0 | ((h->params.ts_pid_pmt >> 8) & 0x0f);
 505         localPAT[18] = h->params.ts_pid_pmt & 0xff;
 506         crc = crc32_be(~0, &localPAT[7], sizeof(PAT) - 7 - 4);
 507         localPAT[sizeof(PAT) - 4] = (crc >> 24) & 0xFF;
 508         localPAT[sizeof(PAT) - 3] = (crc >> 16) & 0xFF;
 509         localPAT[sizeof(PAT) - 2] = (crc >> 8) & 0xFF;
 510         localPAT[sizeof(PAT) - 1] = crc & 0xFF;
 511
 512         /* compute PMT */
 513         memcpy(localPMT, PMT, sizeof(PMT));
 514         localPMT[3] = 0x40 | ((h->params.ts_pid_pmt >> 8) & 0x0f);
 515         localPMT[4] = h->params.ts_pid_pmt & 0xff;
 516         localPMT[15] = 0xE0 | ((h->params.ts_pid_pcr >> 8) & 0x0F);
 517         localPMT[16] = h->params.ts_pid_pcr & 0xFF;
 518         localPMT[20] = 0xE0 | ((h->params.ts_pid_video >> 8) & 0x0F);
 519         localPMT[21] = h->params.ts_pid_video & 0xFF;
 520         localPMT[25] = 0xE0 | ((h->params.ts_pid_audio >> 8) & 0x0F);
 521         localPMT[26] = h->params.ts_pid_audio & 0xFF;
 522         crc = crc32_be(~0, &localPMT[7], sizeof(PMT) - 7 - 4);
 523         localPMT[sizeof(PMT) - 4] = (crc >> 24) & 0xFF;
 524         localPMT[sizeof(PMT) - 3] = (crc >> 16) & 0xFF;
 525         localPMT[sizeof(PMT) - 2] = (crc >> 8) & 0xFF;
 526         localPMT[sizeof(PMT) - 1] = crc & 0xFF;
 527
 528         /* Set Audio PID */
 529         buf[0] = 0xC1;
 530         buf[1] = (h->params.ts_pid_audio >> 8) & 0xFF;
 531         buf[2] = h->params.ts_pid_audio & 0xFF;
 532         i2c_master_send(client,buf,3);
 533
 534         /* Set Video PID */
 535         buf[0] = 0xC0;
 536         buf[1] = (h->params.ts_pid_video >> 8) & 0xFF;
 537         buf[2] = h->params.ts_pid_video & 0xFF;
 538         i2c_master_send(client,buf,3);
 539
 540         /* Set PCR PID */
 541         buf[0] = 0xC4;
 542         buf[1] = (h->params.ts_pid_pcr >> 8) & 0xFF;
 543         buf[2] = h->params.ts_pid_pcr & 0xFF;
 544         i2c_master_send(client,buf,3);
 545
 546         /* Send SI tables */
 547         i2c_master_send(client,localPAT,sizeof(PAT));
 548         i2c_master_send(client,localPMT,sizeof(PMT));
 549
 550         /* mute then unmute audio. This removes buzzing artefacts */
 551         buf[0] = 0xa4;
 552         buf[1] = 1;
 553         i2c_master_send(client, buf, 2);
 554         buf[1] = 0;
 555         i2c_master_send(client, buf, 2);
 556
 557         /* start it going */
 558         saa6752hs_chip_command(client, SAA6752HS_COMMAND_START);
 559
 560         /* readout current state */
 561         buf[0] = 0xE1;
 562         buf[1] = 0xA7;
 563         buf[2] = 0xFE;
 564         buf[3] = 0x82;
 565         buf[4] = 0xB0;
 566         i2c_master_send(client, buf, 5);
 567         i2c_master_recv(client, buf2, 4);
 568
 569         /* change aspect ratio */
 570         buf[0] = 0xE0;
 571         buf[1] = 0xA7;
 572         buf[2] = 0xFE;
 573         buf[3] = 0x82;
 574         buf[4] = 0xB0;
 575         buf[5] = buf2[0];
 576         switch(h->params.vi_aspect) {
 577         case V4L2_MPEG_VIDEO_ASPECT_16x9:
 578                 buf[6] = buf2[1] | 0x40;
 579                 break;
 580         case V4L2_MPEG_VIDEO_ASPECT_4x3:
 581         default:
 582                 buf[6] = buf2[1] & 0xBF;
 583                 break;
 584                 break;
 585         }
 586         buf[7] = buf2[2];
 587         buf[8] = buf2[3];
 588         i2c_master_send(client, buf, 9);
 589
 590         return 0;
 591 }
 592
 593 static int saa6752hs_attach(struct i2c_adapter *adap, int addr, int kind)
 594 {
 595         struct saa6752hs_state *h;
 596
 597
 598         if (NULL == (h = kzalloc(sizeof(*h), GFP_KERNEL)))
 599                 return -ENOMEM;
 600         h->client = client_template;
 601         h->params = param_defaults;
 602         h->client.adapter = adap;
 603         h->client.addr = addr;
 604
 605         /* Assume 625 input lines */
 606         h->standard = 0;
 607
 608         i2c_set_clientdata(&h->client, h);
 609         i2c_attach_client(&h->client);
 610
 611         v4l_info(&h->client,"saa6752hs: chip found @ 0x%x\n", addr<<1);
 612
 613         return 0;
 614 }
 615
 616 static int saa6752hs_probe(struct i2c_adapter *adap)
 617 {
 618         if (adap->class & I2C_CLASS_TV_ANALOG)
 619                 return i2c_probe(adap, &addr_data, saa6752hs_attach);
 620         return 0;
 621 }
 622
 623 static int saa6752hs_detach(struct i2c_client *client)
 624 {
 625         struct saa6752hs_state *h;
 626
 627         h = i2c_get_clientdata(client);
 628         i2c_detach_client(client);
 629         kfree(h);
 630         return 0;
 631 }
 632
 633 static int
 634 saa6752hs_command(struct i2c_client *client, unsigned int cmd, void *arg)
 635 {
 636         struct saa6752hs_state *h = i2c_get_clientdata(client);
 637         struct v4l2_ext_controls *ctrls = arg;
 638         struct saa6752hs_mpeg_params params;
 639         int err = 0;
 640         int i;
 641
 642         switch (cmd) {
 643         case VIDIOC_S_EXT_CTRLS:
 644                 if (ctrls->ctrl_class != V4L2_CTRL_CLASS_MPEG)
 645                         return -EINVAL;
 646                 if (ctrls->count == 0) {
 647                         /* apply settings and start encoder */
 648                         saa6752hs_init(client);
 649                         break;
 650                 }
 651                 /* fall through */
 652         case VIDIOC_TRY_EXT_CTRLS:
 653         case VIDIOC_G_EXT_CTRLS:
 654                 if (ctrls->ctrl_class != V4L2_CTRL_CLASS_MPEG)
 655                         return -EINVAL;
 656                 params = h->params;
 657                 for (i = 0; i < ctrls->count; i++) {
 658                         if ((err = handle_ctrl(&params, ctrls->controls + i, cmd))) {
 659                                 ctrls->error_idx = i;
 660                                 return err;
 661                         }
 662                 }
 663                 h->params = params;
 664                 break;
 665         case VIDIOC_G_FMT:
 666         {
 667            struct v4l2_format *f = arg;
 668
 669            if (h->video_format == SAA6752HS_VF_UNKNOWN)
 670                    h->video_format = SAA6752HS_VF_D1;
 671            f->fmt.pix.width =
 672                    v4l2_format_table[h->video_format].fmt.pix.width;
 673            f->fmt.pix.height =
 674                    v4l2_format_table[h->video_format].fmt.pix.height;
 675            break ;
 676         }
 677         case VIDIOC_S_FMT:
 678         {
 679                 struct v4l2_format *f = arg;
 680
 681                 saa6752hs_set_subsampling(client, f);
 682                 break;
 683         }
 684         case VIDIOC_S_STD:
 685                 h->standard = *((v4l2_std_id *) arg);
 686                 break;
 687         default:
 688                 /* nothing */
 689                 break;
 690         }
 691
 692         return err;
 693 }
 694
 695 /* ----------------------------------------------------------------------- */
 696
 697 static struct i2c_driver driver = {
 698         .driver = {
 699                 .name   = "saa6752hs",
 700         },
 701         .id             = I2C_DRIVERID_SAA6752HS,
 702         .attach_adapter = saa6752hs_probe,
 703         .detach_client  = saa6752hs_detach,
 704         .command        = saa6752hs_command,
 705 };
 706
 707 static struct i2c_client client_template =
 708 {
 709         .name       = "saa6752hs",
 710         .driver     = &driver,
 711 };
 712
 713 static int __init saa6752hs_init_module(void)
 714 {
 715         return i2c_add_driver(&driver);
 716 }
 717
 718 static void __exit saa6752hs_cleanup_module(void)
 719 {
 720         i2c_del_driver(&driver);
 721 }
 722
 723 module_init(saa6752hs_init_module);
 724 module_exit(saa6752hs_cleanup_module);
 725
 726 /*
 727  * Overrides for Emacs so that we follow Linus's tabbing style.
 728  * ---------------------------------------------------------------------------
 729  * Local variables:
 730  * c-basic-offset: 8
 731  * End:
 732  */