drivers/media/video/saa7134/saa6752hs.c

   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>
  16
  17
  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)
  22
  23 /* Addresses to scan */
  24 static unsigned short normal_i2c[] = {0x20, I2C_CLIENT_END};
  25 I2C_CLIENT_INSMOD;
  26
  27 MODULE_DESCRIPTION("device driver for saa6752hs MPEG2 encoder");
  28 MODULE_AUTHOR("Andrew de Quincey");
  29 MODULE_LICENSE("GPL");
  30
  31 static struct i2c_driver driver;
  32 static struct i2c_client client_template;
  33
  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 */
  39         SAA6752HS_VF_UNKNOWN,
  40 };
  41
  42 struct saa6752hs_mpeg_params {
  43         /* transport streams */
  44         __u16                           ts_pid_pmt;
  45         __u16                           ts_pid_audio;
  46         __u16                           ts_pid_video;
  47         __u16                           ts_pid_pcr;
  48
  49         /* audio */
  50         enum v4l2_mpeg_audio_l2_bitrate au_l2_bitrate;
  51
  52         /* video */
  53         enum v4l2_mpeg_video_aspect     vi_aspect;
  54         enum v4l2_mpeg_video_bitrate_mode vi_bitrate_mode;
  55         __u32                           vi_bitrate;
  56         __u32                           vi_bitrate_peak;
  57 };
  58
  59 static const struct v4l2_format v4l2_format_table[] =
  60 {
  61         [SAA6752HS_VF_D1] =
  62                 { .fmt = { .pix = { .width = 720, .height = 576 }}},
  63         [SAA6752HS_VF_2_3_D1] =
  64                 { .fmt = { .pix = { .width = 480, .height = 576 }}},
  65         [SAA6752HS_VF_1_2_D1] =
  66                 { .fmt = { .pix = { .width = 352, .height = 576 }}},
  67         [SAA6752HS_VF_SIF] =
  68                 { .fmt = { .pix = { .width = 352, .height = 288 }}},
  69         [SAA6752HS_VF_UNKNOWN] =
  70                 { .fmt = { .pix = { .width = 0, .height = 0}}},
  71 };
  72
  73 struct saa6752hs_state {
  74         struct i2c_client             client;
  75         struct v4l2_mpeg_compression  old_params;
  76         struct saa6752hs_mpeg_params  params;
  77         enum saa6752hs_videoformat    video_format;
  78         v4l2_std_id                   standard;
  79 };
  80
  81 enum saa6752hs_command {
  82         SAA6752HS_COMMAND_RESET = 0,
  83         SAA6752HS_COMMAND_STOP = 1,
  84         SAA6752HS_COMMAND_START = 2,
  85         SAA6752HS_COMMAND_PAUSE = 3,
  86         SAA6752HS_COMMAND_RECONFIGURE = 4,
  87         SAA6752HS_COMMAND_SLEEP = 5,
  88         SAA6752HS_COMMAND_RECONFIGURE_FORCE = 6,
  89
  90         SAA6752HS_COMMAND_MAX
  91 };
  92
  93 /* ---------------------------------------------------------------------- */
  94
  95 static u8 PAT[] = {
  96         0xc2, /* i2c register */
  97         0x00, /* table number for encoder */
  98
  99         0x47, /* sync */
 100         0x40, 0x00, /* transport_error_indicator(0), payload_unit_start(1), transport_priority(0), pid(0) */
 101         0x10, /* transport_scrambling_control(00), adaptation_field_control(01), continuity_counter(0) */
 102
 103         0x00, /* PSI pointer to start of table */
 104
 105         0x00, /* tid(0) */
 106         0xb0, 0x0d, /* section_syntax_indicator(1), section_length(13) */
 107
 108         0x00, 0x01, /* transport_stream_id(1) */
 109
 110         0xc1, /* version_number(0), current_next_indicator(1) */
 111
 112         0x00, 0x00, /* section_number(0), last_section_number(0) */
 113
 114         0x00, 0x01, /* program_number(1) */
 115
 116         0xe0, 0x00, /* PMT PID */
 117
 118         0x00, 0x00, 0x00, 0x00 /* CRC32 */
 119 };
 120
 121 static u8 PMT[] = {
 122         0xc2, /* i2c register */
 123         0x01, /* table number for encoder */
 124
 125         0x47, /* sync */
 126         0x40, 0x00, /* transport_error_indicator(0), payload_unit_start(1), transport_priority(0), pid */
 127         0x10, /* transport_scrambling_control(00), adaptation_field_control(01), continuity_counter(0) */
 128
 129         0x00, /* PSI pointer to start of table */
 130
 131         0x02, /* tid(2) */
 132         0xb0, 0x17, /* section_syntax_indicator(1), section_length(23) */
 133
 134         0x00, 0x01, /* program_number(1) */
 135
 136         0xc1, /* version_number(0), current_next_indicator(1) */
 137
 138         0x00, 0x00, /* section_number(0), last_section_number(0) */
 139
 140         0xe0, 0x00, /* PCR_PID */
 141
 142         0xf0, 0x00, /* program_info_length(0) */
 143
 144         0x02, 0xe0, 0x00, 0xf0, 0x00, /* video stream type(2), pid */
 145         0x04, 0xe0, 0x00, 0xf0, 0x00, /* audio stream type(4), pid */
 146
 147         0x00, 0x00, 0x00, 0x00 /* CRC32 */
 148 };
 149
 150 static struct saa6752hs_mpeg_params param_defaults =
 151 {
 152         .ts_pid_pmt      = 16,
 153         .ts_pid_video    = 260,
 154         .ts_pid_audio    = 256,
 155         .ts_pid_pcr      = 259,
 156
 157         .vi_aspect       = V4L2_MPEG_VIDEO_ASPECT_4x3,
 158         .vi_bitrate      = 4000,
 159         .vi_bitrate_peak = 6000,
 160         .vi_bitrate_mode = V4L2_MPEG_VIDEO_BITRATE_MODE_VBR,
 161
 162         .au_l2_bitrate   = V4L2_MPEG_AUDIO_L2_BITRATE_256K,
 163 };
 164
 165 static struct v4l2_mpeg_compression old_param_defaults =
 166 {
 167         .st_type         = V4L2_MPEG_TS_2,
 168         .st_bitrate      = {
 169                 .mode    = V4L2_BITRATE_CBR,
 170                 .target  = 7000,
 171         },
 172
 173         .ts_pid_pmt      = 16,
 174         .ts_pid_video    = 260,
 175         .ts_pid_audio    = 256,
 176         .ts_pid_pcr      = 259,
 177
 178         .vi_type         = V4L2_MPEG_VI_2,
 179         .vi_aspect_ratio = V4L2_MPEG_ASPECT_4_3,
 180         .vi_bitrate      = {
 181                 .mode    = V4L2_BITRATE_VBR,
 182                 .target  = 4000,
 183                 .max     = 6000,
 184         },
 185
 186         .au_type         = V4L2_MPEG_AU_2_II,
 187         .au_bitrate      = {
 188                 .mode    = V4L2_BITRATE_CBR,
 189                 .target  = 256,
 190         },
 191
 192 };
 193
 194 /* ---------------------------------------------------------------------- */
 195
 196 static int saa6752hs_chip_command(struct i2c_client* client,
 197                                   enum saa6752hs_command command)
 198 {
 199         unsigned char buf[3];
 200         unsigned long timeout;
 201         int status = 0;
 202
 203         /* execute the command */
 204         switch(command) {
 205         case SAA6752HS_COMMAND_RESET:
 206                 buf[0] = 0x00;
 207                 break;
 208
 209         case SAA6752HS_COMMAND_STOP:
 210                 buf[0] = 0x03;
 211                 break;
 212
 213         case SAA6752HS_COMMAND_START:
 214                 buf[0] = 0x02;
 215                 break;
 216
 217         case SAA6752HS_COMMAND_PAUSE:
 218                 buf[0] = 0x04;
 219                 break;
 220
 221         case SAA6752HS_COMMAND_RECONFIGURE:
 222                 buf[0] = 0x05;
 223                 break;
 224
 225         case SAA6752HS_COMMAND_SLEEP:
 226                 buf[0] = 0x06;
 227                 break;
 228
 229         case SAA6752HS_COMMAND_RECONFIGURE_FORCE:
 230                 buf[0] = 0x07;
 231                 break;
 232
 233         default:
 234                 return -EINVAL;
 235         }
 236
 237         /* set it and wait for it to be so */
 238         i2c_master_send(client, buf, 1);
 239         timeout = jiffies + HZ * 3;
 240         for (;;) {
 241                 /* get the current status */
 242                 buf[0] = 0x10;
 243                 i2c_master_send(client, buf, 1);
 244                 i2c_master_recv(client, buf, 1);
 245
 246                 if (!(buf[0] & 0x20))
 247                         break;
 248                 if (time_after(jiffies,timeout)) {
 249                         status = -ETIMEDOUT;
 250                         break;
 251                 }
 252
 253                 msleep(10);
 254         }
 255
 256         /* delay a bit to let encoder settle */
 257         msleep(50);
 258
 259         return status;
 260 }
 261
 262
 263 static int saa6752hs_set_bitrate(struct i2c_client* client,
 264                                  struct saa6752hs_mpeg_params* params)
 265 {
 266         u8 buf[3];
 267         int tot_bitrate;
 268
 269         /* set the bitrate mode */
 270         buf[0] = 0x71;
 271         buf[1] = (params->vi_bitrate_mode == V4L2_MPEG_VIDEO_BITRATE_MODE_VBR) ? 0 : 1;
 272         i2c_master_send(client, buf, 2);
 273
 274         /* set the video bitrate */
 275         if (params->vi_bitrate_mode == V4L2_MPEG_VIDEO_BITRATE_MODE_VBR) {
 276                 /* set the target bitrate */
 277                 buf[0] = 0x80;
 278                 buf[1] = params->vi_bitrate >> 8;
 279                 buf[2] = params->vi_bitrate & 0xff;
 280                 i2c_master_send(client, buf, 3);
 281
 282                 /* set the max bitrate */
 283                 buf[0] = 0x81;
 284                 buf[1] = params->vi_bitrate_peak >> 8;
 285                 buf[2] = params->vi_bitrate_peak & 0xff;
 286                 i2c_master_send(client, buf, 3);
 287                 tot_bitrate = params->vi_bitrate_peak;
 288         } else {
 289                 /* set the target bitrate (no max bitrate for CBR) */
 290                 buf[0] = 0x81;
 291                 buf[1] = params->vi_bitrate >> 8;
 292                 buf[2] = params->vi_bitrate & 0xff;
 293                 i2c_master_send(client, buf, 3);
 294                 tot_bitrate = params->vi_bitrate;
 295         }
 296
 297         /* set the audio bitrate */
 298         buf[0] = 0x94;
 299         buf[1] = (V4L2_MPEG_AUDIO_L2_BITRATE_256K == params->au_l2_bitrate) ? 0 : 1;
 300         i2c_master_send(client, buf, 2);
 301         tot_bitrate += (V4L2_MPEG_AUDIO_L2_BITRATE_256K == params->au_l2_bitrate) ? 256 : 384;
 302
 303         /* Note: the total max bitrate is determined by adding the video and audio
 304            bitrates together and also adding an extra 768kbit/s to stay on the
 305            safe side. If more control should be required, then an extra MPEG control
 306            should be added. */
 307         tot_bitrate += 768;
 308         if (tot_bitrate > MPEG_TOTAL_TARGET_BITRATE_MAX)
 309                 tot_bitrate = MPEG_TOTAL_TARGET_BITRATE_MAX;
 310
 311         /* set the total bitrate */
 312         buf[0] = 0xb1;
 313         buf[1] = tot_bitrate >> 8;
 314         buf[2] = tot_bitrate & 0xff;
 315         i2c_master_send(client, buf, 3);
 316
 317         return 0;
 318 }
 319
 320 static void saa6752hs_set_subsampling(struct i2c_client* client,
 321                                       struct v4l2_format* f)
 322 {
 323         struct saa6752hs_state *h = i2c_get_clientdata(client);
 324         int dist_352, dist_480, dist_720;
 325
 326         /*
 327           FIXME: translate and round width/height into EMPRESS
 328           subsample type:
 329
 330           type   |   PAL   |  NTSC
 331           ---------------------------
 332           SIF    | 352x288 | 352x240
 333           1/2 D1 | 352x576 | 352x480
 334           2/3 D1 | 480x576 | 480x480
 335           D1     | 720x576 | 720x480
 336         */
 337
 338         dist_352 = abs(f->fmt.pix.width - 352);
 339         dist_480 = abs(f->fmt.pix.width - 480);
 340         dist_720 = abs(f->fmt.pix.width - 720);
 341         if (dist_720 < dist_480) {
 342                 f->fmt.pix.width = 720;
 343                 f->fmt.pix.height = 576;
 344                 h->video_format = SAA6752HS_VF_D1;
 345         }
 346         else if (dist_480 < dist_352) {
 347                 f->fmt.pix.width = 480;
 348                 f->fmt.pix.height = 576;
 349                 h->video_format = SAA6752HS_VF_2_3_D1;
 350         }
 351         else {
 352                 f->fmt.pix.width = 352;
 353                 if (abs(f->fmt.pix.height - 576) <
 354                     abs(f->fmt.pix.height - 288)) {
 355                         f->fmt.pix.height = 576;
 356                         h->video_format = SAA6752HS_VF_1_2_D1;
 357                 }
 358                 else {
 359                         f->fmt.pix.height = 288;
 360                         h->video_format = SAA6752HS_VF_SIF;
 361                 }
 362         }
 363 }
 364
 365
 366 static void saa6752hs_old_set_params(struct i2c_client* client,
 367                                  struct v4l2_mpeg_compression* params)
 368 {
 369         struct saa6752hs_state *h = i2c_get_clientdata(client);
 370
 371         /* check PIDs */
 372         if (params->ts_pid_pmt <= MPEG_PID_MAX) {
 373                 h->old_params.ts_pid_pmt = params->ts_pid_pmt;
 374                 h->params.ts_pid_pmt = params->ts_pid_pmt;
 375         }
 376         if (params->ts_pid_pcr <= MPEG_PID_MAX) {
 377                 h->old_params.ts_pid_pcr = params->ts_pid_pcr;
 378                 h->params.ts_pid_pcr = params->ts_pid_pcr;
 379         }
 380         if (params->ts_pid_video <= MPEG_PID_MAX) {
 381                 h->old_params.ts_pid_video = params->ts_pid_video;
 382                 h->params.ts_pid_video = params->ts_pid_video;
 383         }
 384         if (params->ts_pid_audio <= MPEG_PID_MAX) {
 385                 h->old_params.ts_pid_audio = params->ts_pid_audio;
 386                 h->params.ts_pid_audio = params->ts_pid_audio;
 387         }
 388
 389         /* check bitrate parameters */
 390         if ((params->vi_bitrate.mode == V4L2_BITRATE_CBR) ||
 391             (params->vi_bitrate.mode == V4L2_BITRATE_VBR)) {
 392                 h->old_params.vi_bitrate.mode = params->vi_bitrate.mode;
 393                 h->params.vi_bitrate_mode = (params->vi_bitrate.mode == V4L2_BITRATE_VBR) ?
 394                        V4L2_MPEG_VIDEO_BITRATE_MODE_VBR : V4L2_MPEG_VIDEO_BITRATE_MODE_CBR;
 395         }
 396         if (params->vi_bitrate.mode != V4L2_BITRATE_NONE)
 397                 h->old_params.st_bitrate.target = params->st_bitrate.target;
 398         if (params->vi_bitrate.mode != V4L2_BITRATE_NONE)
 399                 h->old_params.vi_bitrate.target = params->vi_bitrate.target;
 400         if (params->vi_bitrate.mode == V4L2_BITRATE_VBR)
 401                 h->old_params.vi_bitrate.max = params->vi_bitrate.max;
 402         if (params->au_bitrate.mode != V4L2_BITRATE_NONE)
 403                 h->old_params.au_bitrate.target = params->au_bitrate.target;
 404
 405         /* aspect ratio */
 406         if (params->vi_aspect_ratio == V4L2_MPEG_ASPECT_4_3 ||
 407             params->vi_aspect_ratio == V4L2_MPEG_ASPECT_16_9) {
 408                 h->old_params.vi_aspect_ratio = params->vi_aspect_ratio;
 409                 if (params->vi_aspect_ratio == V4L2_MPEG_ASPECT_4_3)
 410                         h->params.vi_aspect = V4L2_MPEG_VIDEO_ASPECT_4x3;
 411                 else
 412                         h->params.vi_aspect = V4L2_MPEG_VIDEO_ASPECT_16x9;
 413         }
 414
 415         /* range checks */
 416         if (h->old_params.st_bitrate.target > MPEG_TOTAL_TARGET_BITRATE_MAX)
 417                 h->old_params.st_bitrate.target = MPEG_TOTAL_TARGET_BITRATE_MAX;
 418         if (h->old_params.vi_bitrate.target > MPEG_VIDEO_TARGET_BITRATE_MAX)
 419                 h->old_params.vi_bitrate.target = MPEG_VIDEO_TARGET_BITRATE_MAX;
 420         if (h->old_params.vi_bitrate.max > MPEG_VIDEO_MAX_BITRATE_MAX)
 421                 h->old_params.vi_bitrate.max = MPEG_VIDEO_MAX_BITRATE_MAX;
 422         h->params.vi_bitrate = params->vi_bitrate.target;
 423         h->params.vi_bitrate_peak = params->vi_bitrate.max;
 424         if (h->old_params.au_bitrate.target <= 256) {
 425                 h->old_params.au_bitrate.target = 256;
 426                 h->params.au_l2_bitrate = V4L2_MPEG_AUDIO_L2_BITRATE_256K;
 427         }
 428         else {
 429                 h->old_params.au_bitrate.target = 384;
 430                 h->params.au_l2_bitrate = V4L2_MPEG_AUDIO_L2_BITRATE_384K;
 431         }
 432 }
 433
 434 static int handle_ctrl(struct saa6752hs_mpeg_params *params,
 435                 struct v4l2_ext_control *ctrl, unsigned int cmd)
 436 {
 437         int old = 0, new;
 438         int set = (cmd == VIDIOC_S_EXT_CTRLS);
 439
 440         new = ctrl->value;
 441         switch (ctrl->id) {
 442                 case V4L2_CID_MPEG_STREAM_TYPE:
 443                         old = V4L2_MPEG_STREAM_TYPE_MPEG2_TS;
 444                         if (set && new != old)
 445                                 return -ERANGE;
 446                         new = old;
 447                         break;
 448                 case V4L2_CID_MPEG_STREAM_PID_PMT:
 449                         old = params->ts_pid_pmt;
 450                         if (set && new > MPEG_PID_MAX)
 451                                 return -ERANGE;
 452                         if (new > MPEG_PID_MAX)
 453                                 new = MPEG_PID_MAX;
 454                         params->ts_pid_pmt = new;
 455                         break;
 456                 case V4L2_CID_MPEG_STREAM_PID_AUDIO:
 457                         old = params->ts_pid_audio;
 458                         if (set && new > MPEG_PID_MAX)
 459                                 return -ERANGE;
 460                         if (new > MPEG_PID_MAX)
 461                                 new = MPEG_PID_MAX;
 462                         params->ts_pid_audio = new;
 463                         break;
 464                 case V4L2_CID_MPEG_STREAM_PID_VIDEO:
 465                         old = params->ts_pid_video;
 466                         if (set && new > MPEG_PID_MAX)
 467                                 return -ERANGE;
 468                         if (new > MPEG_PID_MAX)
 469                                 new = MPEG_PID_MAX;
 470                         params->ts_pid_video = new;
 471                         break;
 472                 case V4L2_CID_MPEG_STREAM_PID_PCR:
 473                         old = params->ts_pid_pcr;
 474                         if (set && new > MPEG_PID_MAX)
 475                                 return -ERANGE;
 476                         if (new > MPEG_PID_MAX)
 477                                 new = MPEG_PID_MAX;
 478                         params->ts_pid_pcr = new;
 479                         break;
 480                 case V4L2_CID_MPEG_AUDIO_ENCODING:
 481                         old = V4L2_MPEG_AUDIO_ENCODING_LAYER_2;
 482                         if (set && new != old)
 483                                 return -ERANGE;
 484                         new = old;
 485                         break;
 486                 case V4L2_CID_MPEG_AUDIO_L2_BITRATE:
 487                         old = params->au_l2_bitrate;
 488                         if (set && new != V4L2_MPEG_AUDIO_L2_BITRATE_256K &&
 489                                    new != V4L2_MPEG_AUDIO_L2_BITRATE_384K)
 490                                 return -ERANGE;
 491                         if (new <= V4L2_MPEG_AUDIO_L2_BITRATE_256K)
 492                                 new = V4L2_MPEG_AUDIO_L2_BITRATE_256K;
 493                         else
 494                                 new = V4L2_MPEG_AUDIO_L2_BITRATE_384K;
 495                         params->au_l2_bitrate = new;
 496                         break;
 497                 case V4L2_CID_MPEG_AUDIO_SAMPLING_FREQ:
 498                         old = V4L2_MPEG_AUDIO_SAMPLING_FREQ_48000;
 499                         if (set && new != old)
 500                                 return -ERANGE;
 501                         new = old;
 502                         break;
 503                 case V4L2_CID_MPEG_VIDEO_ENCODING:
 504                         old = V4L2_MPEG_VIDEO_ENCODING_MPEG_2;
 505                         if (set && new != old)
 506                                 return -ERANGE;
 507                         new = old;
 508                         break;
 509                 case V4L2_CID_MPEG_VIDEO_ASPECT:
 510                         old = params->vi_aspect;
 511                         if (set && new != V4L2_MPEG_VIDEO_ASPECT_16x9 &&
 512                                    new != V4L2_MPEG_VIDEO_ASPECT_4x3)
 513                                 return -ERANGE;
 514                         if (new != V4L2_MPEG_VIDEO_ASPECT_16x9)
 515                                 new = V4L2_MPEG_VIDEO_ASPECT_4x3;
 516                         params->vi_aspect = new;
 517                         break;
 518                 case V4L2_CID_MPEG_VIDEO_BITRATE:
 519                         old = params->vi_bitrate * 1000;
 520                         new = 1000 * (new / 1000);
 521                         if (set && new > MPEG_VIDEO_TARGET_BITRATE_MAX * 1000)
 522                                 return -ERANGE;
 523                         if (new > MPEG_VIDEO_TARGET_BITRATE_MAX * 1000)
 524                                 new = MPEG_VIDEO_TARGET_BITRATE_MAX * 1000;
 525                         params->vi_bitrate = new / 1000;
 526                         break;
 527                 case V4L2_CID_MPEG_VIDEO_BITRATE_PEAK:
 528                         old = params->vi_bitrate_peak * 1000;
 529                         new = 1000 * (new / 1000);
 530                         if (set && new > MPEG_VIDEO_TARGET_BITRATE_MAX * 1000)
 531                                 return -ERANGE;
 532                         if (new > MPEG_VIDEO_TARGET_BITRATE_MAX * 1000)
 533                                 new = MPEG_VIDEO_TARGET_BITRATE_MAX * 1000;
 534                         params->vi_bitrate_peak = new / 1000;
 535                         break;
 536                 case V4L2_CID_MPEG_VIDEO_BITRATE_MODE:
 537                         old = params->vi_bitrate_mode;
 538                         params->vi_bitrate_mode = new;
 539                         break;
 540                 default:
 541                         return -EINVAL;
 542         }
 543         if (cmd == VIDIOC_G_EXT_CTRLS)
 544                 ctrl->value = old;
 545         else
 546                 ctrl->value = new;
 547         return 0;
 548 }
 549
 550 static int saa6752hs_init(struct i2c_client* client)
 551 {
 552         unsigned char buf[9], buf2[4];
 553         struct saa6752hs_state *h;
 554         u32 crc;
 555         unsigned char localPAT[256];
 556         unsigned char localPMT[256];
 557
 558         h = i2c_get_clientdata(client);
 559
 560         /* Set video format - must be done first as it resets other settings */
 561         buf[0] = 0x41;
 562         buf[1] = h->video_format;
 563         i2c_master_send(client, buf, 2);
 564
 565         /* Set number of lines in input signal */
 566         buf[0] = 0x40;
 567         buf[1] = 0x00;
 568         if (h->standard & V4L2_STD_525_60)
 569                 buf[1] = 0x01;
 570         i2c_master_send(client, buf, 2);
 571
 572         /* set bitrate */
 573         saa6752hs_set_bitrate(client, &h->params);
 574
 575         /* Set GOP structure {3, 13} */
 576         buf[0] = 0x72;
 577         buf[1] = 0x03;
 578         buf[2] = 0x0D;
 579         i2c_master_send(client,buf,3);
 580
 581         /* Set minimum Q-scale {4} */
 582         buf[0] = 0x82;
 583         buf[1] = 0x04;
 584         i2c_master_send(client,buf,2);
 585
 586         /* Set maximum Q-scale {12} */
 587         buf[0] = 0x83;
 588         buf[1] = 0x0C;
 589         i2c_master_send(client,buf,2);
 590
 591         /* Set Output Protocol */
 592         buf[0] = 0xD0;
 593         buf[1] = 0x81;
 594         i2c_master_send(client,buf,2);
 595
 596         /* Set video output stream format {TS} */
 597         buf[0] = 0xB0;
 598         buf[1] = 0x05;
 599         i2c_master_send(client,buf,2);
 600
 601         /* compute PAT */
 602         memcpy(localPAT, PAT, sizeof(PAT));
 603         localPAT[17] = 0xe0 | ((h->params.ts_pid_pmt >> 8) & 0x0f);
 604         localPAT[18] = h->params.ts_pid_pmt & 0xff;
 605         crc = crc32_be(~0, &localPAT[7], sizeof(PAT) - 7 - 4);
 606         localPAT[sizeof(PAT) - 4] = (crc >> 24) & 0xFF;
 607         localPAT[sizeof(PAT) - 3] = (crc >> 16) & 0xFF;
 608         localPAT[sizeof(PAT) - 2] = (crc >> 8) & 0xFF;
 609         localPAT[sizeof(PAT) - 1] = crc & 0xFF;
 610
 611         /* compute PMT */
 612         memcpy(localPMT, PMT, sizeof(PMT));
 613         localPMT[3] = 0x40 | ((h->params.ts_pid_pmt >> 8) & 0x0f);
 614         localPMT[4] = h->params.ts_pid_pmt & 0xff;
 615         localPMT[15] = 0xE0 | ((h->params.ts_pid_pcr >> 8) & 0x0F);
 616         localPMT[16] = h->params.ts_pid_pcr & 0xFF;
 617         localPMT[20] = 0xE0 | ((h->params.ts_pid_video >> 8) & 0x0F);
 618         localPMT[21] = h->params.ts_pid_video & 0xFF;
 619         localPMT[25] = 0xE0 | ((h->params.ts_pid_audio >> 8) & 0x0F);
 620         localPMT[26] = h->params.ts_pid_audio & 0xFF;
 621         crc = crc32_be(~0, &localPMT[7], sizeof(PMT) - 7 - 4);
 622         localPMT[sizeof(PMT) - 4] = (crc >> 24) & 0xFF;
 623         localPMT[sizeof(PMT) - 3] = (crc >> 16) & 0xFF;
 624         localPMT[sizeof(PMT) - 2] = (crc >> 8) & 0xFF;
 625         localPMT[sizeof(PMT) - 1] = crc & 0xFF;
 626
 627         /* Set Audio PID */
 628         buf[0] = 0xC1;
 629         buf[1] = (h->params.ts_pid_audio >> 8) & 0xFF;
 630         buf[2] = h->params.ts_pid_audio & 0xFF;
 631         i2c_master_send(client,buf,3);
 632
 633         /* Set Video PID */
 634         buf[0] = 0xC0;
 635         buf[1] = (h->params.ts_pid_video >> 8) & 0xFF;
 636         buf[2] = h->params.ts_pid_video & 0xFF;
 637         i2c_master_send(client,buf,3);
 638
 639         /* Set PCR PID */
 640         buf[0] = 0xC4;
 641         buf[1] = (h->params.ts_pid_pcr >> 8) & 0xFF;
 642         buf[2] = h->params.ts_pid_pcr & 0xFF;
 643         i2c_master_send(client,buf,3);
 644
 645         /* Send SI tables */
 646         i2c_master_send(client,localPAT,sizeof(PAT));
 647         i2c_master_send(client,localPMT,sizeof(PMT));
 648
 649         /* mute then unmute audio. This removes buzzing artefacts */
 650         buf[0] = 0xa4;
 651         buf[1] = 1;
 652         i2c_master_send(client, buf, 2);
 653         buf[1] = 0;
 654         i2c_master_send(client, buf, 2);
 655
 656         /* start it going */
 657         saa6752hs_chip_command(client, SAA6752HS_COMMAND_START);
 658
 659         /* readout current state */
 660         buf[0] = 0xE1;
 661         buf[1] = 0xA7;
 662         buf[2] = 0xFE;
 663         buf[3] = 0x82;
 664         buf[4] = 0xB0;
 665         i2c_master_send(client, buf, 5);
 666         i2c_master_recv(client, buf2, 4);
 667
 668         /* change aspect ratio */
 669         buf[0] = 0xE0;
 670         buf[1] = 0xA7;
 671         buf[2] = 0xFE;
 672         buf[3] = 0x82;
 673         buf[4] = 0xB0;
 674         buf[5] = buf2[0];
 675         switch(h->params.vi_aspect) {
 676         case V4L2_MPEG_VIDEO_ASPECT_16x9:
 677                 buf[6] = buf2[1] | 0x40;
 678                 break;
 679         case V4L2_MPEG_VIDEO_ASPECT_4x3:
 680         default:
 681                 buf[6] = buf2[1] & 0xBF;
 682                 break;
 683                 break;
 684         }
 685         buf[7] = buf2[2];
 686         buf[8] = buf2[3];
 687         i2c_master_send(client, buf, 9);
 688
 689         return 0;
 690 }
 691
 692 static int saa6752hs_attach(struct i2c_adapter *adap, int addr, int kind)
 693 {
 694         struct saa6752hs_state *h;
 695
 696
 697         if (NULL == (h = kzalloc(sizeof(*h), GFP_KERNEL)))
 698                 return -ENOMEM;
 699         h->client = client_template;
 700         h->params = param_defaults;
 701         h->old_params = old_param_defaults;
 702         h->client.adapter = adap;
 703         h->client.addr = addr;
 704
 705         /* Assume 625 input lines */
 706         h->standard = 0;
 707
 708         i2c_set_clientdata(&h->client, h);
 709         i2c_attach_client(&h->client);
 710
 711         v4l_info(&h->client,"saa6752hs: chip found @ 0x%x\n", addr<<1);
 712
 713         return 0;
 714 }
 715
 716 static int saa6752hs_probe(struct i2c_adapter *adap)
 717 {
 718         if (adap->class & I2C_CLASS_TV_ANALOG)
 719                 return i2c_probe(adap, &addr_data, saa6752hs_attach);
 720         return 0;
 721 }
 722
 723 static int saa6752hs_detach(struct i2c_client *client)
 724 {
 725         struct saa6752hs_state *h;
 726
 727         h = i2c_get_clientdata(client);
 728         i2c_detach_client(client);
 729         kfree(h);
 730         return 0;
 731 }
 732
 733 static int
 734 saa6752hs_command(struct i2c_client *client, unsigned int cmd, void *arg)
 735 {
 736         struct saa6752hs_state *h = i2c_get_clientdata(client);
 737         struct v4l2_ext_controls *ctrls = arg;
 738         struct v4l2_mpeg_compression *old_params = arg;
 739         struct saa6752hs_mpeg_params params;
 740         int err = 0;
 741         int i;
 742
 743         switch (cmd) {
 744         case VIDIOC_S_MPEGCOMP:
 745                 if (NULL == old_params) {
 746                         /* apply settings and start encoder */
 747                         saa6752hs_init(client);
 748                         break;
 749                 }
 750                 saa6752hs_old_set_params(client, old_params);
 751                 /* fall through */
 752         case VIDIOC_G_MPEGCOMP:
 753                 *old_params = h->old_params;
 754                 break;
 755         case VIDIOC_S_EXT_CTRLS:
 756                 if (ctrls->ctrl_class != V4L2_CTRL_CLASS_MPEG)
 757                         return -EINVAL;
 758                 if (ctrls->count == 0) {
 759                         /* apply settings and start encoder */
 760                         saa6752hs_init(client);
 761                         break;
 762                 }
 763                 /* fall through */
 764         case VIDIOC_TRY_EXT_CTRLS:
 765         case VIDIOC_G_EXT_CTRLS:
 766                 if (ctrls->ctrl_class != V4L2_CTRL_CLASS_MPEG)
 767                         return -EINVAL;
 768                 params = h->params;
 769                 for (i = 0; i < ctrls->count; i++) {
 770                         if ((err = handle_ctrl(&params, ctrls->controls + i, cmd))) {
 771                                 ctrls->error_idx = i;
 772                                 return err;
 773                         }
 774                 }
 775                 h->params = params;
 776                 break;
 777         case VIDIOC_G_FMT:
 778         {
 779            struct v4l2_format *f = arg;
 780
 781            if (h->video_format == SAA6752HS_VF_UNKNOWN)
 782                    h->video_format = SAA6752HS_VF_D1;
 783            f->fmt.pix.width =
 784                    v4l2_format_table[h->video_format].fmt.pix.width;
 785            f->fmt.pix.height =
 786                    v4l2_format_table[h->video_format].fmt.pix.height;
 787            break ;
 788         }
 789         case VIDIOC_S_FMT:
 790         {
 791                 struct v4l2_format *f = arg;
 792
 793                 saa6752hs_set_subsampling(client, f);
 794                 break;
 795         }
 796         case VIDIOC_S_STD:
 797                 h->standard = *((v4l2_std_id *) arg);
 798                 break;
 799         default:
 800                 /* nothing */
 801                 break;
 802         }
 803
 804         return err;
 805 }
 806
 807 /* ----------------------------------------------------------------------- */
 808
 809 static struct i2c_driver driver = {
 810         .driver = {
 811                 .name   = "saa6752hs",
 812         },
 813         .id             = I2C_DRIVERID_SAA6752HS,
 814         .attach_adapter = saa6752hs_probe,
 815         .detach_client  = saa6752hs_detach,
 816         .command        = saa6752hs_command,
 817 };
 818
 819 static struct i2c_client client_template =
 820 {
 821         .name       = "saa6752hs",
 822         .driver     = &driver,
 823 };
 824
 825 static int __init saa6752hs_init_module(void)
 826 {
 827         return i2c_add_driver(&driver);
 828 }
 829
 830 static void __exit saa6752hs_cleanup_module(void)
 831 {
 832         i2c_del_driver(&driver);
 833 }
 834
 835 module_init(saa6752hs_init_module);
 836 module_exit(saa6752hs_cleanup_module);
 837
 838 /*
 839  * Overrides for Emacs so that we follow Linus's tabbing style.
 840  * ---------------------------------------------------------------------------
 841  * Local variables:
 842  * c-basic-offset: 8
 843  * End:
 844  */