kernel/drivers/media/i2c/saa6752hs.c

   1  /*
   2     saa6752hs - i2c-driver for the saa6752hs by Philips
   3
   4     Copyright (C) 2004 Andrew de Quincey
   5
   6     AC-3 support:
   7
   8     Copyright (C) 2008 Hans Verkuil <hverkuil@xs4all.nl>
   9
  10     This program is free software; you can redistribute it and/or modify
  11     it under the terms of the GNU General Public License vs published by
  12     the Free Software Foundation; either version 2 of the License, or
  13     (at your option) any later version.
  14
  15     This program is distributed in the hope that it will be useful,
  16     but WITHOUT ANY WARRANTY; without even the implied warranty of
  17     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18     GNU General Public License for more details.
  19
  20     You should have received a copy of the GNU General Public License
  21     along with this program; if not, write to the Free Software
  22     Foundation, Inc., 675 Mvss Ave, Cambridge, MA 02139, USA.
  23   */
  24
  25 #include <linux/module.h>
  26 #include <linux/kernel.h>
  27 #include <linux/string.h>
  28 #include <linux/timer.h>
  29 #include <linux/delay.h>
  30 #include <linux/errno.h>
  31 #include <linux/slab.h>
  32 #include <linux/poll.h>
  33 #include <linux/i2c.h>
  34 #include <linux/types.h>
  35 #include <linux/videodev2.h>
  36 #include <linux/init.h>
  37 #include <linux/crc32.h>
  38 #include <media/v4l2-device.h>
  39 #include <media/v4l2-ctrls.h>
  40 #include <media/v4l2-common.h>
  41
  42 #define MPEG_VIDEO_TARGET_BITRATE_MAX  27000
  43 #define MPEG_VIDEO_MAX_BITRATE_MAX     27000
  44 #define MPEG_TOTAL_TARGET_BITRATE_MAX  27000
  45 #define MPEG_PID_MAX ((1 << 14) - 1)
  46
  47
  48 MODULE_DESCRIPTION("device driver for saa6752hs MPEG2 encoder");
  49 MODULE_AUTHOR("Andrew de Quincey");
  50 MODULE_LICENSE("GPL");
  51
  52 enum saa6752hs_videoformat {
  53         SAA6752HS_VF_D1 = 0,    /* standard D1 video format: 720x576 */
  54         SAA6752HS_VF_2_3_D1 = 1,/* 2/3D1 video format: 480x576 */
  55         SAA6752HS_VF_1_2_D1 = 2,/* 1/2D1 video format: 352x576 */
  56         SAA6752HS_VF_SIF = 3,   /* SIF video format: 352x288 */
  57         SAA6752HS_VF_UNKNOWN,
  58 };
  59
  60 struct saa6752hs_mpeg_params {
  61         /* transport streams */
  62         __u16                           ts_pid_pmt;
  63         __u16                           ts_pid_audio;
  64         __u16                           ts_pid_video;
  65         __u16                           ts_pid_pcr;
  66
  67         /* audio */
  68         enum v4l2_mpeg_audio_encoding    au_encoding;
  69         enum v4l2_mpeg_audio_l2_bitrate  au_l2_bitrate;
  70         enum v4l2_mpeg_audio_ac3_bitrate au_ac3_bitrate;
  71
  72         /* video */
  73         enum v4l2_mpeg_video_aspect     vi_aspect;
  74         enum v4l2_mpeg_video_bitrate_mode vi_bitrate_mode;
  75         __u32                           vi_bitrate;
  76         __u32                           vi_bitrate_peak;
  77 };
  78
  79 static const struct v4l2_format v4l2_format_table[] =
  80 {
  81         [SAA6752HS_VF_D1] =
  82                 { .fmt = { .pix = { .width = 720, .height = 576 }}},
  83         [SAA6752HS_VF_2_3_D1] =
  84                 { .fmt = { .pix = { .width = 480, .height = 576 }}},
  85         [SAA6752HS_VF_1_2_D1] =
  86                 { .fmt = { .pix = { .width = 352, .height = 576 }}},
  87         [SAA6752HS_VF_SIF] =
  88                 { .fmt = { .pix = { .width = 352, .height = 288 }}},
  89         [SAA6752HS_VF_UNKNOWN] =
  90                 { .fmt = { .pix = { .width = 0, .height = 0}}},
  91 };
  92
  93 struct saa6752hs_state {
  94         struct v4l2_subdev            sd;
  95         struct v4l2_ctrl_handler      hdl;
  96         struct { /* video bitrate mode control cluster */
  97                 struct v4l2_ctrl *video_bitrate_mode;
  98                 struct v4l2_ctrl *video_bitrate;
  99                 struct v4l2_ctrl *video_bitrate_peak;
 100         };
 101         u32                           revision;
 102         int                           has_ac3;
 103         struct saa6752hs_mpeg_params  params;
 104         enum saa6752hs_videoformat    video_format;
 105         v4l2_std_id                   standard;
 106 };
 107
 108 enum saa6752hs_command {
 109         SAA6752HS_COMMAND_RESET = 0,
 110         SAA6752HS_COMMAND_STOP = 1,
 111         SAA6752HS_COMMAND_START = 2,
 112         SAA6752HS_COMMAND_PAUSE = 3,
 113         SAA6752HS_COMMAND_RECONFIGURE = 4,
 114         SAA6752HS_COMMAND_SLEEP = 5,
 115         SAA6752HS_COMMAND_RECONFIGURE_FORCE = 6,
 116
 117         SAA6752HS_COMMAND_MAX
 118 };
 119
 120 static inline struct saa6752hs_state *to_state(struct v4l2_subdev *sd)
 121 {
 122         return container_of(sd, struct saa6752hs_state, sd);
 123 }
 124
 125 /* ---------------------------------------------------------------------- */
 126
 127 static const u8 PAT[] = {
 128         0xc2, /* i2c register */
 129         0x00, /* table number for encoder */
 130
 131         0x47, /* sync */
 132         0x40, 0x00, /* transport_error_indicator(0), payload_unit_start(1), transport_priority(0), pid(0) */
 133         0x10, /* transport_scrambling_control(00), adaptation_field_control(01), continuity_counter(0) */
 134
 135         0x00, /* PSI pointer to start of table */
 136
 137         0x00, /* tid(0) */
 138         0xb0, 0x0d, /* section_syntax_indicator(1), section_length(13) */
 139
 140         0x00, 0x01, /* transport_stream_id(1) */
 141
 142         0xc1, /* version_number(0), current_next_indicator(1) */
 143
 144         0x00, 0x00, /* section_number(0), last_section_number(0) */
 145
 146         0x00, 0x01, /* program_number(1) */
 147
 148         0xe0, 0x00, /* PMT PID */
 149
 150         0x00, 0x00, 0x00, 0x00 /* CRC32 */
 151 };
 152
 153 static const u8 PMT[] = {
 154         0xc2, /* i2c register */
 155         0x01, /* table number for encoder */
 156
 157         0x47, /* sync */
 158         0x40, 0x00, /* transport_error_indicator(0), payload_unit_start(1), transport_priority(0), pid */
 159         0x10, /* transport_scrambling_control(00), adaptation_field_control(01), continuity_counter(0) */
 160
 161         0x00, /* PSI pointer to start of table */
 162
 163         0x02, /* tid(2) */
 164         0xb0, 0x17, /* section_syntax_indicator(1), section_length(23) */
 165
 166         0x00, 0x01, /* program_number(1) */
 167
 168         0xc1, /* version_number(0), current_next_indicator(1) */
 169
 170         0x00, 0x00, /* section_number(0), last_section_number(0) */
 171
 172         0xe0, 0x00, /* PCR_PID */
 173
 174         0xf0, 0x00, /* program_info_length(0) */
 175
 176         0x02, 0xe0, 0x00, 0xf0, 0x00, /* video stream type(2), pid */
 177         0x04, 0xe0, 0x00, 0xf0, 0x00, /* audio stream type(4), pid */
 178
 179         0x00, 0x00, 0x00, 0x00 /* CRC32 */
 180 };
 181
 182 static const u8 PMT_AC3[] = {
 183         0xc2, /* i2c register */
 184         0x01, /* table number for encoder(1) */
 185         0x47, /* sync */
 186
 187         0x40, /* transport_error_indicator(0), payload_unit_start(1), transport_priority(0) */
 188         0x10, /* PMT PID (0x0010) */
 189         0x10, /* transport_scrambling_control(00), adaptation_field_control(01), continuity_counter(0) */
 190
 191         0x00, /* PSI pointer to start of table */
 192
 193         0x02, /* TID (2) */
 194         0xb0, 0x1a, /* section_syntax_indicator(1), section_length(26) */
 195
 196         0x00, 0x01, /* program_number(1) */
 197
 198         0xc1, /* version_number(0), current_next_indicator(1) */
 199
 200         0x00, 0x00, /* section_number(0), last_section_number(0) */
 201
 202         0xe1, 0x04, /* PCR_PID (0x0104) */
 203
 204         0xf0, 0x00, /* program_info_length(0) */
 205
 206         0x02, 0xe1, 0x00, 0xf0, 0x00, /* video stream type(2), pid */
 207         0x06, 0xe1, 0x03, 0xf0, 0x03, /* audio stream type(6), pid */
 208         0x6a, /* AC3 */
 209         0x01, /* Descriptor_length(1) */
 210         0x00, /* component_type_flag(0), bsid_flag(0), mainid_flag(0), asvc_flag(0), reserved flags(0) */
 211
 212         0xED, 0xDE, 0x2D, 0xF3 /* CRC32 BE */
 213 };
 214
 215 static const struct saa6752hs_mpeg_params param_defaults =
 216 {
 217         .ts_pid_pmt      = 16,
 218         .ts_pid_video    = 260,
 219         .ts_pid_audio    = 256,
 220         .ts_pid_pcr      = 259,
 221
 222         .vi_aspect       = V4L2_MPEG_VIDEO_ASPECT_4x3,
 223         .vi_bitrate      = 4000,
 224         .vi_bitrate_peak = 6000,
 225         .vi_bitrate_mode = V4L2_MPEG_VIDEO_BITRATE_MODE_VBR,
 226
 227         .au_encoding     = V4L2_MPEG_AUDIO_ENCODING_LAYER_2,
 228         .au_l2_bitrate   = V4L2_MPEG_AUDIO_L2_BITRATE_256K,
 229         .au_ac3_bitrate  = V4L2_MPEG_AUDIO_AC3_BITRATE_256K,
 230 };
 231
 232 /* ---------------------------------------------------------------------- */
 233
 234 static int saa6752hs_chip_command(struct i2c_client *client,
 235                                   enum saa6752hs_command command)
 236 {
 237         unsigned char buf[3];
 238         unsigned long timeout;
 239         int status = 0;
 240
 241         /* execute the command */
 242         switch(command) {
 243         case SAA6752HS_COMMAND_RESET:
 244                 buf[0] = 0x00;
 245                 break;
 246
 247         case SAA6752HS_COMMAND_STOP:
 248                 buf[0] = 0x03;
 249                 break;
 250
 251         case SAA6752HS_COMMAND_START:
 252                 buf[0] = 0x02;
 253                 break;
 254
 255         case SAA6752HS_COMMAND_PAUSE:
 256                 buf[0] = 0x04;
 257                 break;
 258
 259         case SAA6752HS_COMMAND_RECONFIGURE:
 260                 buf[0] = 0x05;
 261                 break;
 262
 263         case SAA6752HS_COMMAND_SLEEP:
 264                 buf[0] = 0x06;
 265                 break;
 266
 267         case SAA6752HS_COMMAND_RECONFIGURE_FORCE:
 268                 buf[0] = 0x07;
 269                 break;
 270
 271         default:
 272                 return -EINVAL;
 273         }
 274
 275         /* set it and wait for it to be so */
 276         i2c_master_send(client, buf, 1);
 277         timeout = jiffies + HZ * 3;
 278         for (;;) {
 279                 /* get the current status */
 280                 buf[0] = 0x10;
 281                 i2c_master_send(client, buf, 1);
 282                 i2c_master_recv(client, buf, 1);
 283
 284                 if (!(buf[0] & 0x20))
 285                         break;
 286                 if (time_after(jiffies,timeout)) {
 287                         status = -ETIMEDOUT;
 288                         break;
 289                 }
 290
 291                 msleep(10);
 292         }
 293
 294         /* delay a bit to let encoder settle */
 295         msleep(50);
 296
 297         return status;
 298 }
 299
 300
 301 static inline void set_reg8(struct i2c_client *client, uint8_t reg, uint8_t val)
 302 {
 303         u8 buf[2];
 304
 305         buf[0] = reg;
 306         buf[1] = val;
 307         i2c_master_send(client, buf, 2);
 308 }
 309
 310 static inline void set_reg16(struct i2c_client *client, uint8_t reg, uint16_t val)
 311 {
 312         u8 buf[3];
 313
 314         buf[0] = reg;
 315         buf[1] = val >> 8;
 316         buf[2] = val & 0xff;
 317         i2c_master_send(client, buf, 3);
 318 }
 319
 320 static int saa6752hs_set_bitrate(struct i2c_client *client,
 321                                  struct saa6752hs_state *h)
 322 {
 323         struct saa6752hs_mpeg_params *params = &h->params;
 324         int tot_bitrate;
 325         int is_384k;
 326
 327         /* set the bitrate mode */
 328         set_reg8(client, 0x71,
 329                 params->vi_bitrate_mode != V4L2_MPEG_VIDEO_BITRATE_MODE_VBR);
 330
 331         /* set the video bitrate */
 332         if (params->vi_bitrate_mode == V4L2_MPEG_VIDEO_BITRATE_MODE_VBR) {
 333                 /* set the target bitrate */
 334                 set_reg16(client, 0x80, params->vi_bitrate);
 335
 336                 /* set the max bitrate */
 337                 set_reg16(client, 0x81, params->vi_bitrate_peak);
 338                 tot_bitrate = params->vi_bitrate_peak;
 339         } else {
 340                 /* set the target bitrate (no max bitrate for CBR) */
 341                 set_reg16(client, 0x81, params->vi_bitrate);
 342                 tot_bitrate = params->vi_bitrate;
 343         }
 344
 345         /* set the audio encoding */
 346         set_reg8(client, 0x93,
 347                         params->au_encoding == V4L2_MPEG_AUDIO_ENCODING_AC3);
 348
 349         /* set the audio bitrate */
 350         if (params->au_encoding == V4L2_MPEG_AUDIO_ENCODING_AC3)
 351                 is_384k = V4L2_MPEG_AUDIO_AC3_BITRATE_384K == params->au_ac3_bitrate;
 352         else
 353                 is_384k = V4L2_MPEG_AUDIO_L2_BITRATE_384K == params->au_l2_bitrate;
 354         set_reg8(client, 0x94, is_384k);
 355         tot_bitrate += is_384k ? 384 : 256;
 356
 357         /* Note: the total max bitrate is determined by adding the video and audio
 358            bitrates together and also adding an extra 768kbit/s to stay on the
 359            safe side. If more control should be required, then an extra MPEG control
 360            should be added. */
 361         tot_bitrate += 768;
 362         if (tot_bitrate > MPEG_TOTAL_TARGET_BITRATE_MAX)
 363                 tot_bitrate = MPEG_TOTAL_TARGET_BITRATE_MAX;
 364
 365         /* set the total bitrate */
 366         set_reg16(client, 0xb1, tot_bitrate);
 367         return 0;
 368 }
 369
 370 static int saa6752hs_try_ctrl(struct v4l2_ctrl *ctrl)
 371 {
 372         struct saa6752hs_state *h =
 373                 container_of(ctrl->handler, struct saa6752hs_state, hdl);
 374
 375         switch (ctrl->id) {
 376         case V4L2_CID_MPEG_VIDEO_BITRATE_MODE:
 377                 /* peak bitrate shall be >= normal bitrate */
 378                 if (ctrl->val == V4L2_MPEG_VIDEO_BITRATE_MODE_VBR &&
 379                     h->video_bitrate_peak->val < h->video_bitrate->val)
 380                         h->video_bitrate_peak->val = h->video_bitrate->val;
 381                 break;
 382         }
 383         return 0;
 384 }
 385
 386 static int saa6752hs_s_ctrl(struct v4l2_ctrl *ctrl)
 387 {
 388         struct saa6752hs_state *h =
 389                 container_of(ctrl->handler, struct saa6752hs_state, hdl);
 390         struct saa6752hs_mpeg_params *params = &h->params;
 391
 392         switch (ctrl->id) {
 393         case V4L2_CID_MPEG_STREAM_TYPE:
 394                 break;
 395         case V4L2_CID_MPEG_STREAM_PID_PMT:
 396                 params->ts_pid_pmt = ctrl->val;
 397                 break;
 398         case V4L2_CID_MPEG_STREAM_PID_AUDIO:
 399                 params->ts_pid_audio = ctrl->val;
 400                 break;
 401         case V4L2_CID_MPEG_STREAM_PID_VIDEO:
 402                 params->ts_pid_video = ctrl->val;
 403                 break;
 404         case V4L2_CID_MPEG_STREAM_PID_PCR:
 405                 params->ts_pid_pcr = ctrl->val;
 406                 break;
 407         case V4L2_CID_MPEG_AUDIO_ENCODING:
 408                 params->au_encoding = ctrl->val;
 409                 break;
 410         case V4L2_CID_MPEG_AUDIO_L2_BITRATE:
 411                 params->au_l2_bitrate = ctrl->val;
 412                 break;
 413         case V4L2_CID_MPEG_AUDIO_AC3_BITRATE:
 414                 params->au_ac3_bitrate = ctrl->val;
 415                 break;
 416         case V4L2_CID_MPEG_AUDIO_SAMPLING_FREQ:
 417                 break;
 418         case V4L2_CID_MPEG_VIDEO_ENCODING:
 419                 break;
 420         case V4L2_CID_MPEG_VIDEO_ASPECT:
 421                 params->vi_aspect = ctrl->val;
 422                 break;
 423         case V4L2_CID_MPEG_VIDEO_BITRATE_MODE:
 424                 params->vi_bitrate_mode = ctrl->val;
 425                 params->vi_bitrate = h->video_bitrate->val / 1000;
 426                 params->vi_bitrate_peak = h->video_bitrate_peak->val / 1000;
 427                 v4l2_ctrl_activate(h->video_bitrate_peak,
 428                                 ctrl->val == V4L2_MPEG_VIDEO_BITRATE_MODE_VBR);
 429                 break;
 430         default:
 431                 return -EINVAL;
 432         }
 433         return 0;
 434 }
 435
 436 static int saa6752hs_init(struct v4l2_subdev *sd, u32 leading_null_bytes)
 437 {
 438         unsigned char buf[9], buf2[4];
 439         struct saa6752hs_state *h = to_state(sd);
 440         struct i2c_client *client = v4l2_get_subdevdata(sd);
 441         unsigned size;
 442         u32 crc;
 443         unsigned char localPAT[256];
 444         unsigned char localPMT[256];
 445
 446         /* Set video format - must be done first as it resets other settings */
 447         set_reg8(client, 0x41, h->video_format);
 448
 449         /* Set number of lines in input signal */
 450         set_reg8(client, 0x40, (h->standard & V4L2_STD_525_60) ? 1 : 0);
 451
 452         /* set bitrate */
 453         saa6752hs_set_bitrate(client, h);
 454
 455         /* Set GOP structure {3, 13} */
 456         set_reg16(client, 0x72, 0x030d);
 457
 458         /* Set minimum Q-scale {4} */
 459         set_reg8(client, 0x82, 0x04);
 460
 461         /* Set maximum Q-scale {12} */
 462         set_reg8(client, 0x83, 0x0c);
 463
 464         /* Set Output Protocol */
 465         set_reg8(client, 0xd0, 0x81);
 466
 467         /* Set video output stream format {TS} */
 468         set_reg8(client, 0xb0, 0x05);
 469
 470         /* Set leading null byte for TS */
 471         set_reg16(client, 0xf6, leading_null_bytes);
 472
 473         /* compute PAT */
 474         memcpy(localPAT, PAT, sizeof(PAT));
 475         localPAT[17] = 0xe0 | ((h->params.ts_pid_pmt >> 8) & 0x0f);
 476         localPAT[18] = h->params.ts_pid_pmt & 0xff;
 477         crc = crc32_be(~0, &localPAT[7], sizeof(PAT) - 7 - 4);
 478         localPAT[sizeof(PAT) - 4] = (crc >> 24) & 0xFF;
 479         localPAT[sizeof(PAT) - 3] = (crc >> 16) & 0xFF;
 480         localPAT[sizeof(PAT) - 2] = (crc >> 8) & 0xFF;
 481         localPAT[sizeof(PAT) - 1] = crc & 0xFF;
 482
 483         /* compute PMT */
 484         if (h->params.au_encoding == V4L2_MPEG_AUDIO_ENCODING_AC3) {
 485                 size = sizeof(PMT_AC3);
 486                 memcpy(localPMT, PMT_AC3, size);
 487         } else {
 488                 size = sizeof(PMT);
 489                 memcpy(localPMT, PMT, size);
 490         }
 491         localPMT[3] = 0x40 | ((h->params.ts_pid_pmt >> 8) & 0x0f);
 492         localPMT[4] = h->params.ts_pid_pmt & 0xff;
 493         localPMT[15] = 0xE0 | ((h->params.ts_pid_pcr >> 8) & 0x0F);
 494         localPMT[16] = h->params.ts_pid_pcr & 0xFF;
 495         localPMT[20] = 0xE0 | ((h->params.ts_pid_video >> 8) & 0x0F);
 496         localPMT[21] = h->params.ts_pid_video & 0xFF;
 497         localPMT[25] = 0xE0 | ((h->params.ts_pid_audio >> 8) & 0x0F);
 498         localPMT[26] = h->params.ts_pid_audio & 0xFF;
 499         crc = crc32_be(~0, &localPMT[7], size - 7 - 4);
 500         localPMT[size - 4] = (crc >> 24) & 0xFF;
 501         localPMT[size - 3] = (crc >> 16) & 0xFF;
 502         localPMT[size - 2] = (crc >> 8) & 0xFF;
 503         localPMT[size - 1] = crc & 0xFF;
 504
 505         /* Set Audio PID */
 506         set_reg16(client, 0xc1, h->params.ts_pid_audio);
 507
 508         /* Set Video PID */
 509         set_reg16(client, 0xc0, h->params.ts_pid_video);
 510
 511         /* Set PCR PID */
 512         set_reg16(client, 0xc4, h->params.ts_pid_pcr);
 513
 514         /* Send SI tables */
 515         i2c_master_send(client, localPAT, sizeof(PAT));
 516         i2c_master_send(client, localPMT, size);
 517
 518         /* mute then unmute audio. This removes buzzing artefacts */
 519         set_reg8(client, 0xa4, 1);
 520         set_reg8(client, 0xa4, 0);
 521
 522         /* start it going */
 523         saa6752hs_chip_command(client, SAA6752HS_COMMAND_START);
 524
 525         /* readout current state */
 526         buf[0] = 0xE1;
 527         buf[1] = 0xA7;
 528         buf[2] = 0xFE;
 529         buf[3] = 0x82;
 530         buf[4] = 0xB0;
 531         i2c_master_send(client, buf, 5);
 532         i2c_master_recv(client, buf2, 4);
 533
 534         /* change aspect ratio */
 535         buf[0] = 0xE0;
 536         buf[1] = 0xA7;
 537         buf[2] = 0xFE;
 538         buf[3] = 0x82;
 539         buf[4] = 0xB0;
 540         buf[5] = buf2[0];
 541         switch (h->params.vi_aspect) {
 542         case V4L2_MPEG_VIDEO_ASPECT_16x9:
 543                 buf[6] = buf2[1] | 0x40;
 544                 break;
 545         case V4L2_MPEG_VIDEO_ASPECT_4x3:
 546         default:
 547                 buf[6] = buf2[1] & 0xBF;
 548                 break;
 549         }
 550         buf[7] = buf2[2];
 551         buf[8] = buf2[3];
 552         i2c_master_send(client, buf, 9);
 553
 554         return 0;
 555 }
 556
 557 static int saa6752hs_g_mbus_fmt(struct v4l2_subdev *sd, struct v4l2_mbus_framefmt *f)
 558 {
 559         struct saa6752hs_state *h = to_state(sd);
 560
 561         if (h->video_format == SAA6752HS_VF_UNKNOWN)
 562                 h->video_format = SAA6752HS_VF_D1;
 563         f->width = v4l2_format_table[h->video_format].fmt.pix.width;
 564         f->height = v4l2_format_table[h->video_format].fmt.pix.height;
 565         f->code = MEDIA_BUS_FMT_FIXED;
 566         f->field = V4L2_FIELD_INTERLACED;
 567         f->colorspace = V4L2_COLORSPACE_SMPTE170M;
 568         return 0;
 569 }
 570
 571 static int saa6752hs_try_mbus_fmt(struct v4l2_subdev *sd, struct v4l2_mbus_framefmt *f)
 572 {
 573         int dist_352, dist_480, dist_720;
 574
 575         f->code = MEDIA_BUS_FMT_FIXED;
 576
 577         dist_352 = abs(f->width - 352);
 578         dist_480 = abs(f->width - 480);
 579         dist_720 = abs(f->width - 720);
 580         if (dist_720 < dist_480) {
 581                 f->width = 720;
 582                 f->height = 576;
 583         } else if (dist_480 < dist_352) {
 584                 f->width = 480;
 585                 f->height = 576;
 586         } else {
 587                 f->width = 352;
 588                 if (abs(f->height - 576) < abs(f->height - 288))
 589                         f->height = 576;
 590                 else
 591                         f->height = 288;
 592         }
 593         f->field = V4L2_FIELD_INTERLACED;
 594         f->colorspace = V4L2_COLORSPACE_SMPTE170M;
 595         return 0;
 596 }
 597
 598 static int saa6752hs_s_mbus_fmt(struct v4l2_subdev *sd, struct v4l2_mbus_framefmt *f)
 599 {
 600         struct saa6752hs_state *h = to_state(sd);
 601
 602         if (f->code != MEDIA_BUS_FMT_FIXED)
 603                 return -EINVAL;
 604
 605         /*
 606           FIXME: translate and round width/height into EMPRESS
 607           subsample type:
 608
 609           type   |   PAL   |  NTSC
 610           ---------------------------
 611           SIF    | 352x288 | 352x240
 612           1/2 D1 | 352x576 | 352x480
 613           2/3 D1 | 480x576 | 480x480
 614           D1     | 720x576 | 720x480
 615         */
 616
 617         saa6752hs_try_mbus_fmt(sd, f);
 618         if (f->width == 720)
 619                 h->video_format = SAA6752HS_VF_D1;
 620         else if (f->width == 480)
 621                 h->video_format = SAA6752HS_VF_2_3_D1;
 622         else if (f->height == 576)
 623                 h->video_format = SAA6752HS_VF_1_2_D1;
 624         else
 625                 h->video_format = SAA6752HS_VF_SIF;
 626         return 0;
 627 }
 628
 629 static int saa6752hs_s_std(struct v4l2_subdev *sd, v4l2_std_id std)
 630 {
 631         struct saa6752hs_state *h = to_state(sd);
 632
 633         h->standard = std;
 634         return 0;
 635 }
 636
 637 /* ----------------------------------------------------------------------- */
 638
 639 static const struct v4l2_ctrl_ops saa6752hs_ctrl_ops = {
 640         .try_ctrl = saa6752hs_try_ctrl,
 641         .s_ctrl = saa6752hs_s_ctrl,
 642 };
 643
 644 static const struct v4l2_subdev_core_ops saa6752hs_core_ops = {
 645         .init = saa6752hs_init,
 646 };
 647
 648 static const struct v4l2_subdev_video_ops saa6752hs_video_ops = {
 649         .s_std = saa6752hs_s_std,
 650         .s_mbus_fmt = saa6752hs_s_mbus_fmt,
 651         .try_mbus_fmt = saa6752hs_try_mbus_fmt,
 652         .g_mbus_fmt = saa6752hs_g_mbus_fmt,
 653 };
 654
 655 static const struct v4l2_subdev_ops saa6752hs_ops = {
 656         .core = &saa6752hs_core_ops,
 657         .video = &saa6752hs_video_ops,
 658 };
 659
 660 static int saa6752hs_probe(struct i2c_client *client,
 661                 const struct i2c_device_id *id)
 662 {
 663         struct saa6752hs_state *h;
 664         struct v4l2_subdev *sd;
 665         struct v4l2_ctrl_handler *hdl;
 666         u8 addr = 0x13;
 667         u8 data[12];
 668
 669         v4l_info(client, "chip found @ 0x%x (%s)\n",
 670                         client->addr << 1, client->adapter->name);
 671
 672         h = devm_kzalloc(&client->dev, sizeof(*h), GFP_KERNEL);
 673         if (h == NULL)
 674                 return -ENOMEM;
 675         sd = &h->sd;
 676         v4l2_i2c_subdev_init(sd, client, &saa6752hs_ops);
 677
 678         i2c_master_send(client, &addr, 1);
 679         i2c_master_recv(client, data, sizeof(data));
 680         h->revision = (data[8] << 8) | data[9];
 681         h->has_ac3 = 0;
 682         if (h->revision == 0x0206) {
 683                 h->has_ac3 = 1;
 684                 v4l_info(client, "supports AC-3\n");
 685         }
 686         h->params = param_defaults;
 687
 688         hdl = &h->hdl;
 689         v4l2_ctrl_handler_init(hdl, 14);
 690         v4l2_ctrl_new_std_menu(hdl, &saa6752hs_ctrl_ops,
 691                 V4L2_CID_MPEG_AUDIO_ENCODING,
 692                 h->has_ac3 ? V4L2_MPEG_AUDIO_ENCODING_AC3 :
 693                         V4L2_MPEG_AUDIO_ENCODING_LAYER_2,
 694                 0x0d, V4L2_MPEG_AUDIO_ENCODING_LAYER_2);
 695
 696         v4l2_ctrl_new_std_menu(hdl, &saa6752hs_ctrl_ops,
 697                 V4L2_CID_MPEG_AUDIO_L2_BITRATE,
 698                 V4L2_MPEG_AUDIO_L2_BITRATE_384K,
 699                 ~((1 << V4L2_MPEG_AUDIO_L2_BITRATE_256K) |
 700                   (1 << V4L2_MPEG_AUDIO_L2_BITRATE_384K)),
 701                 V4L2_MPEG_AUDIO_L2_BITRATE_256K);
 702
 703         if (h->has_ac3)
 704                 v4l2_ctrl_new_std_menu(hdl, &saa6752hs_ctrl_ops,
 705                         V4L2_CID_MPEG_AUDIO_AC3_BITRATE,
 706                         V4L2_MPEG_AUDIO_AC3_BITRATE_384K,
 707                         ~((1 << V4L2_MPEG_AUDIO_AC3_BITRATE_256K) |
 708                           (1 << V4L2_MPEG_AUDIO_AC3_BITRATE_384K)),
 709                         V4L2_MPEG_AUDIO_AC3_BITRATE_256K);
 710
 711         v4l2_ctrl_new_std_menu(hdl, &saa6752hs_ctrl_ops,
 712                 V4L2_CID_MPEG_AUDIO_SAMPLING_FREQ,
 713                 V4L2_MPEG_AUDIO_SAMPLING_FREQ_48000,
 714                 ~(1 << V4L2_MPEG_AUDIO_SAMPLING_FREQ_48000),
 715                 V4L2_MPEG_AUDIO_SAMPLING_FREQ_48000);
 716
 717         v4l2_ctrl_new_std_menu(hdl, &saa6752hs_ctrl_ops,
 718                 V4L2_CID_MPEG_VIDEO_ENCODING,
 719                 V4L2_MPEG_VIDEO_ENCODING_MPEG_2,
 720                 ~(1 << V4L2_MPEG_VIDEO_ENCODING_MPEG_2),
 721                 V4L2_MPEG_VIDEO_ENCODING_MPEG_2);
 722
 723         v4l2_ctrl_new_std_menu(hdl, &saa6752hs_ctrl_ops,
 724                 V4L2_CID_MPEG_VIDEO_ASPECT,
 725                 V4L2_MPEG_VIDEO_ASPECT_16x9, 0x01,
 726                 V4L2_MPEG_VIDEO_ASPECT_4x3);
 727
 728         h->video_bitrate_peak = v4l2_ctrl_new_std(hdl, &saa6752hs_ctrl_ops,
 729                 V4L2_CID_MPEG_VIDEO_BITRATE_PEAK,
 730                 1000000, 27000000, 1000, 8000000);
 731
 732         v4l2_ctrl_new_std_menu(hdl, &saa6752hs_ctrl_ops,
 733                 V4L2_CID_MPEG_STREAM_TYPE,
 734                 V4L2_MPEG_STREAM_TYPE_MPEG2_TS,
 735                 ~(1 << V4L2_MPEG_STREAM_TYPE_MPEG2_TS),
 736                 V4L2_MPEG_STREAM_TYPE_MPEG2_TS);
 737
 738         h->video_bitrate_mode = v4l2_ctrl_new_std_menu(hdl, &saa6752hs_ctrl_ops,
 739                 V4L2_CID_MPEG_VIDEO_BITRATE_MODE,
 740                 V4L2_MPEG_VIDEO_BITRATE_MODE_CBR, 0,
 741                 V4L2_MPEG_VIDEO_BITRATE_MODE_VBR);
 742         h->video_bitrate = v4l2_ctrl_new_std(hdl, &saa6752hs_ctrl_ops,
 743                 V4L2_CID_MPEG_VIDEO_BITRATE, 1000000, 27000000, 1000, 6000000);
 744         v4l2_ctrl_new_std(hdl, &saa6752hs_ctrl_ops,
 745                 V4L2_CID_MPEG_STREAM_PID_PMT, 0, (1 << 14) - 1, 1, 16);
 746         v4l2_ctrl_new_std(hdl, &saa6752hs_ctrl_ops,
 747                 V4L2_CID_MPEG_STREAM_PID_AUDIO, 0, (1 << 14) - 1, 1, 260);
 748         v4l2_ctrl_new_std(hdl, &saa6752hs_ctrl_ops,
 749                 V4L2_CID_MPEG_STREAM_PID_VIDEO, 0, (1 << 14) - 1, 1, 256);
 750         v4l2_ctrl_new_std(hdl, &saa6752hs_ctrl_ops,
 751                 V4L2_CID_MPEG_STREAM_PID_PCR, 0, (1 << 14) - 1, 1, 259);
 752         sd->ctrl_handler = hdl;
 753         if (hdl->error) {
 754                 int err = hdl->error;
 755
 756                 v4l2_ctrl_handler_free(hdl);
 757                 return err;
 758         }
 759         v4l2_ctrl_cluster(3, &h->video_bitrate_mode);
 760         v4l2_ctrl_handler_setup(hdl);
 761         h->standard = 0; /* Assume 625 input lines */
 762         return 0;
 763 }
 764
 765 static int saa6752hs_remove(struct i2c_client *client)
 766 {
 767         struct v4l2_subdev *sd = i2c_get_clientdata(client);
 768
 769         v4l2_device_unregister_subdev(sd);
 770         v4l2_ctrl_handler_free(&to_state(sd)->hdl);
 771         return 0;
 772 }
 773
 774 static const struct i2c_device_id saa6752hs_id[] = {
 775         { "saa6752hs", 0 },
 776         { }
 777 };
 778 MODULE_DEVICE_TABLE(i2c, saa6752hs_id);
 779
 780 static struct i2c_driver saa6752hs_driver = {
 781         .driver = {
 782                 .owner  = THIS_MODULE,
 783                 .name   = "saa6752hs",
 784         },
 785         .probe          = saa6752hs_probe,
 786         .remove         = saa6752hs_remove,
 787         .id_table       = saa6752hs_id,
 788 };
 789
 790 module_i2c_driver(saa6752hs_driver);