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/videodev.h>
  13 #include <linux/init.h>
  14 #include <linux/crc32.h>
  15
  16 #include <media/id.h>
  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 static const struct v4l2_format v4l2_format_table[] =
  43 {
  44         [SAA6752HS_VF_D1] =
  45                 { .fmt = { .pix = { .width = 720, .height = 576 }}},
  46         [SAA6752HS_VF_2_3_D1] =
  47                 { .fmt = { .pix = { .width = 480, .height = 576 }}},
  48         [SAA6752HS_VF_1_2_D1] =
  49                 { .fmt = { .pix = { .width = 352, .height = 576 }}},
  50         [SAA6752HS_VF_SIF] =
  51                 { .fmt = { .pix = { .width = 352, .height = 288 }}},
  52         [SAA6752HS_VF_UNKNOWN] =
  53                 { .fmt = { .pix = { .width = 0, .height = 0}}},
  54 };
  55
  56 struct saa6752hs_state {
  57         struct i2c_client             client;
  58         struct v4l2_mpeg_compression  params;
  59         enum saa6752hs_videoformat    video_format;
  60 };
  61
  62 enum saa6752hs_command {
  63         SAA6752HS_COMMAND_RESET = 0,
  64         SAA6752HS_COMMAND_STOP = 1,
  65         SAA6752HS_COMMAND_START = 2,
  66         SAA6752HS_COMMAND_PAUSE = 3,
  67         SAA6752HS_COMMAND_RECONFIGURE = 4,
  68         SAA6752HS_COMMAND_SLEEP = 5,
  69         SAA6752HS_COMMAND_RECONFIGURE_FORCE = 6,
  70
  71         SAA6752HS_COMMAND_MAX
  72 };
  73
  74 /* ---------------------------------------------------------------------- */
  75
  76 static u8 PAT[] = {
  77         0xc2, // i2c register
  78         0x00, // table number for encoder
  79
  80         0x47, // sync
  81         0x40, 0x00, // transport_error_indicator(0), payload_unit_start(1), transport_priority(0), pid(0)
  82         0x10, // transport_scrambling_control(00), adaptation_field_control(01), continuity_counter(0)
  83
  84         0x00, // PSI pointer to start of table
  85
  86         0x00, // tid(0)
  87         0xb0, 0x0d, // section_syntax_indicator(1), section_length(13)
  88
  89         0x00, 0x01, // transport_stream_id(1)
  90
  91         0xc1, // version_number(0), current_next_indicator(1)
  92
  93         0x00, 0x00, // section_number(0), last_section_number(0)
  94
  95         0x00, 0x01, // program_number(1)
  96
  97         0xe0, 0x00, // PMT PID
  98
  99         0x00, 0x00, 0x00, 0x00 // CRC32
 100 };
 101
 102 static u8 PMT[] = {
 103         0xc2, // i2c register
 104         0x01, // table number for encoder
 105
 106         0x47, // sync
 107         0x40, 0x00, // transport_error_indicator(0), payload_unit_start(1), transport_priority(0), pid
 108         0x10, // transport_scrambling_control(00), adaptation_field_control(01), continuity_counter(0)
 109
 110         0x00, // PSI pointer to start of table
 111
 112         0x02, // tid(2)
 113         0xb0, 0x17, // section_syntax_indicator(1), section_length(23)
 114
 115         0x00, 0x01, // program_number(1)
 116
 117         0xc1, // version_number(0), current_next_indicator(1)
 118
 119         0x00, 0x00, // section_number(0), last_section_number(0)
 120
 121         0xe0, 0x00, // PCR_PID
 122
 123         0xf0, 0x00, // program_info_length(0)
 124
 125         0x02, 0xe0, 0x00, 0xf0, 0x00, // video stream type(2), pid
 126         0x04, 0xe0, 0x00, 0xf0, 0x00, // audio stream type(4), pid
 127
 128         0x00, 0x00, 0x00, 0x00 // CRC32
 129 };
 130
 131 static struct v4l2_mpeg_compression param_defaults =
 132 {
 133         .st_type         = V4L2_MPEG_TS_2,
 134         .st_bitrate      = {
 135                 .mode    = V4L2_BITRATE_CBR,
 136                 .target  = 7000,
 137         },
 138
 139         .ts_pid_pmt      = 16,
 140         .ts_pid_video    = 260,
 141         .ts_pid_audio    = 256,
 142         .ts_pid_pcr      = 259,
 143
 144         .vi_type         = V4L2_MPEG_VI_2,
 145         .vi_aspect_ratio = V4L2_MPEG_ASPECT_4_3,
 146         .vi_bitrate      = {
 147                 .mode    = V4L2_BITRATE_VBR,
 148                 .target  = 4000,
 149                 .max     = 6000,
 150         },
 151
 152         .au_type         = V4L2_MPEG_AU_2_II,
 153         .au_bitrate      = {
 154                 .mode    = V4L2_BITRATE_CBR,
 155                 .target  = 256,
 156         },
 157
 158 #if 0
 159         /* FIXME: size? via S_FMT? */
 160         .video_format = MPEG_VIDEO_FORMAT_D1,
 161 #endif
 162 };
 163
 164 /* ---------------------------------------------------------------------- */
 165
 166 static int saa6752hs_chip_command(struct i2c_client* client,
 167                                   enum saa6752hs_command command)
 168 {
 169         unsigned char buf[3];
 170         unsigned long timeout;
 171         int status = 0;
 172
 173         // execute the command
 174         switch(command) {
 175         case SAA6752HS_COMMAND_RESET:
 176                 buf[0] = 0x00;
 177                 break;
 178
 179         case SAA6752HS_COMMAND_STOP:
 180                 buf[0] = 0x03;
 181                 break;
 182
 183         case SAA6752HS_COMMAND_START:
 184                 buf[0] = 0x02;
 185                 break;
 186
 187         case SAA6752HS_COMMAND_PAUSE:
 188                 buf[0] = 0x04;
 189                 break;
 190
 191         case SAA6752HS_COMMAND_RECONFIGURE:
 192                 buf[0] = 0x05;
 193                 break;
 194
 195         case SAA6752HS_COMMAND_SLEEP:
 196                 buf[0] = 0x06;
 197                 break;
 198
 199         case SAA6752HS_COMMAND_RECONFIGURE_FORCE:
 200                 buf[0] = 0x07;
 201                 break;
 202
 203         default:
 204                 return -EINVAL;
 205         }
 206
 207         // set it and wait for it to be so
 208         i2c_master_send(client, buf, 1);
 209         timeout = jiffies + HZ * 3;
 210         for (;;) {
 211                 // get the current status
 212                 buf[0] = 0x10;
 213                 i2c_master_send(client, buf, 1);
 214                 i2c_master_recv(client, buf, 1);
 215
 216                 if (!(buf[0] & 0x20))
 217                         break;
 218                 if (time_after(jiffies,timeout)) {
 219                         status = -ETIMEDOUT;
 220                         break;
 221                 }
 222
 223                 // wait a bit
 224                 msleep(10);
 225         }
 226
 227         // delay a bit to let encoder settle
 228         msleep(50);
 229
 230         // done
 231         return status;
 232 }
 233
 234
 235 static int saa6752hs_set_bitrate(struct i2c_client* client,
 236                                  struct v4l2_mpeg_compression* params)
 237 {
 238         u8 buf[3];
 239
 240         // set the bitrate mode
 241         buf[0] = 0x71;
 242         buf[1] = (params->vi_bitrate.mode == V4L2_BITRATE_VBR) ? 0 : 1;
 243         i2c_master_send(client, buf, 2);
 244
 245         // set the video bitrate
 246         if (params->vi_bitrate.mode == V4L2_BITRATE_VBR) {
 247                 // set the target bitrate
 248                 buf[0] = 0x80;
 249                 buf[1] = params->vi_bitrate.target >> 8;
 250                 buf[2] = params->vi_bitrate.target & 0xff;
 251                 i2c_master_send(client, buf, 3);
 252
 253                 // set the max bitrate
 254                 buf[0] = 0x81;
 255                 buf[1] = params->vi_bitrate.max >> 8;
 256                 buf[2] = params->vi_bitrate.max & 0xff;
 257                 i2c_master_send(client, buf, 3);
 258         } else {
 259                 // set the target bitrate (no max bitrate for CBR)
 260                 buf[0] = 0x81;
 261                 buf[1] = params->vi_bitrate.target >> 8;
 262                 buf[2] = params->vi_bitrate.target & 0xff;
 263                 i2c_master_send(client, buf, 3);
 264         }
 265
 266         // set the audio bitrate
 267         buf[0] = 0x94;
 268         buf[1] = (256 == params->au_bitrate.target) ? 0 : 1;
 269         i2c_master_send(client, buf, 2);
 270
 271         // set the total bitrate
 272         buf[0] = 0xb1;
 273         buf[1] = params->st_bitrate.target >> 8;
 274         buf[2] = params->st_bitrate.target & 0xff;
 275         i2c_master_send(client, buf, 3);
 276
 277         // return success
 278         return 0;
 279 }
 280
 281 static void saa6752hs_set_subsampling(struct i2c_client* client,
 282                                       struct v4l2_format* f)
 283 {
 284         struct saa6752hs_state *h = i2c_get_clientdata(client);
 285         int dist_352, dist_480, dist_720;
 286
 287         /*
 288           FIXME: translate and round width/height into EMPRESS
 289           subsample type:
 290
 291           type   |   PAL   |  NTSC
 292           ---------------------------
 293           SIF    | 352x288 | 352x240
 294           1/2 D1 | 352x576 | 352x480
 295           2/3 D1 | 480x576 | 480x480
 296           D1     | 720x576 | 720x480
 297         */
 298
 299         dist_352 = abs(f->fmt.pix.width - 352);
 300         dist_480 = abs(f->fmt.pix.width - 480);
 301         dist_720 = abs(f->fmt.pix.width - 720);
 302         if (dist_720 < dist_480) {
 303                 f->fmt.pix.width = 720;
 304                 f->fmt.pix.height = 576;
 305                 h->video_format = SAA6752HS_VF_D1;
 306         }
 307         else if (dist_480 < dist_352) {
 308                 f->fmt.pix.width = 480;
 309                 f->fmt.pix.height = 576;
 310                 h->video_format = SAA6752HS_VF_2_3_D1;
 311         }
 312         else {
 313                 f->fmt.pix.width = 352;
 314                 if (abs(f->fmt.pix.height - 576) <
 315                     abs(f->fmt.pix.height - 288)) {
 316                         f->fmt.pix.height = 576;
 317                         h->video_format = SAA6752HS_VF_1_2_D1;
 318                 }
 319                 else {
 320                         f->fmt.pix.height = 288;
 321                         h->video_format = SAA6752HS_VF_SIF;
 322                 }
 323         }
 324 }
 325
 326
 327 static void saa6752hs_set_params(struct i2c_client* client,
 328                                  struct v4l2_mpeg_compression* params)
 329 {
 330         struct saa6752hs_state *h = i2c_get_clientdata(client);
 331
 332         /* check PIDs */
 333         if (params->ts_pid_pmt <= MPEG_PID_MAX)
 334                 h->params.ts_pid_pmt = params->ts_pid_pmt;
 335         if (params->ts_pid_pcr <= MPEG_PID_MAX)
 336                 h->params.ts_pid_pcr = params->ts_pid_pcr;
 337         if (params->ts_pid_video <= MPEG_PID_MAX)
 338                 h->params.ts_pid_video = params->ts_pid_video;
 339         if (params->ts_pid_audio <= MPEG_PID_MAX)
 340                 h->params.ts_pid_audio = params->ts_pid_audio;
 341
 342         /* check bitrate parameters */
 343         if ((params->vi_bitrate.mode == V4L2_BITRATE_CBR) ||
 344             (params->vi_bitrate.mode == V4L2_BITRATE_VBR))
 345                 h->params.vi_bitrate.mode = params->vi_bitrate.mode;
 346         if (params->vi_bitrate.mode != V4L2_BITRATE_NONE)
 347                 h->params.st_bitrate.target = params->st_bitrate.target;
 348         if (params->vi_bitrate.mode != V4L2_BITRATE_NONE)
 349                 h->params.vi_bitrate.target = params->vi_bitrate.target;
 350         if (params->vi_bitrate.mode == V4L2_BITRATE_VBR)
 351                 h->params.vi_bitrate.max = params->vi_bitrate.max;
 352         if (params->au_bitrate.mode != V4L2_BITRATE_NONE)
 353                 h->params.au_bitrate.target = params->au_bitrate.target;
 354
 355         /* aspect ratio */
 356         if (params->vi_aspect_ratio == V4L2_MPEG_ASPECT_4_3 ||
 357             params->vi_aspect_ratio == V4L2_MPEG_ASPECT_16_9)
 358                 h->params.vi_aspect_ratio = params->vi_aspect_ratio;
 359
 360         /* range checks */
 361         if (h->params.st_bitrate.target > MPEG_TOTAL_TARGET_BITRATE_MAX)
 362                 h->params.st_bitrate.target = MPEG_TOTAL_TARGET_BITRATE_MAX;
 363         if (h->params.vi_bitrate.target > MPEG_VIDEO_TARGET_BITRATE_MAX)
 364                 h->params.vi_bitrate.target = MPEG_VIDEO_TARGET_BITRATE_MAX;
 365         if (h->params.vi_bitrate.max > MPEG_VIDEO_MAX_BITRATE_MAX)
 366                 h->params.vi_bitrate.max = MPEG_VIDEO_MAX_BITRATE_MAX;
 367         if (h->params.au_bitrate.target <= 256)
 368                 h->params.au_bitrate.target = 256;
 369         else
 370                 h->params.au_bitrate.target = 384;
 371 }
 372
 373 static int saa6752hs_init(struct i2c_client* client)
 374 {
 375         unsigned char buf[9], buf2[4];
 376         struct saa6752hs_state *h;
 377         u32 crc;
 378         unsigned char localPAT[256];
 379         unsigned char localPMT[256];
 380
 381         h = i2c_get_clientdata(client);
 382
 383         // Set video format - must be done first as it resets other settings
 384         buf[0] = 0x41;
 385         buf[1] = h->video_format;
 386         i2c_master_send(client, buf, 2);
 387
 388         // set bitrate
 389         saa6752hs_set_bitrate(client, &h->params);
 390
 391         // Set GOP structure {3, 13}
 392         buf[0] = 0x72;
 393         buf[1] = 0x03;
 394         buf[2] = 0x0D;
 395         i2c_master_send(client,buf,3);
 396
 397         // Set minimum Q-scale {4}
 398         buf[0] = 0x82;
 399         buf[1] = 0x04;
 400         i2c_master_send(client,buf,2);
 401
 402         // Set maximum Q-scale {12}
 403         buf[0] = 0x83;
 404         buf[1] = 0x0C;
 405         i2c_master_send(client,buf,2);
 406
 407         // Set Output Protocol
 408         buf[0] = 0xD0;
 409         buf[1] = 0x81;
 410         i2c_master_send(client,buf,2);
 411
 412         // Set video output stream format {TS}
 413         buf[0] = 0xB0;
 414         buf[1] = 0x05;
 415         i2c_master_send(client,buf,2);
 416
 417         /* compute PAT */
 418         memcpy(localPAT, PAT, sizeof(PAT));
 419         localPAT[17] = 0xe0 | ((h->params.ts_pid_pmt >> 8) & 0x0f);
 420         localPAT[18] = h->params.ts_pid_pmt & 0xff;
 421         crc = crc32_be(~0, &localPAT[7], sizeof(PAT) - 7 - 4);
 422         localPAT[sizeof(PAT) - 4] = (crc >> 24) & 0xFF;
 423         localPAT[sizeof(PAT) - 3] = (crc >> 16) & 0xFF;
 424         localPAT[sizeof(PAT) - 2] = (crc >> 8) & 0xFF;
 425         localPAT[sizeof(PAT) - 1] = crc & 0xFF;
 426
 427         /* compute PMT */
 428         memcpy(localPMT, PMT, sizeof(PMT));
 429         localPMT[3] = 0x40 | ((h->params.ts_pid_pmt >> 8) & 0x0f);
 430         localPMT[4] = h->params.ts_pid_pmt & 0xff;
 431         localPMT[15] = 0xE0 | ((h->params.ts_pid_pcr >> 8) & 0x0F);
 432         localPMT[16] = h->params.ts_pid_pcr & 0xFF;
 433         localPMT[20] = 0xE0 | ((h->params.ts_pid_video >> 8) & 0x0F);
 434         localPMT[21] = h->params.ts_pid_video & 0xFF;
 435         localPMT[25] = 0xE0 | ((h->params.ts_pid_audio >> 8) & 0x0F);
 436         localPMT[26] = h->params.ts_pid_audio & 0xFF;
 437         crc = crc32_be(~0, &localPMT[7], sizeof(PMT) - 7 - 4);
 438         localPMT[sizeof(PMT) - 4] = (crc >> 24) & 0xFF;
 439         localPMT[sizeof(PMT) - 3] = (crc >> 16) & 0xFF;
 440         localPMT[sizeof(PMT) - 2] = (crc >> 8) & 0xFF;
 441         localPMT[sizeof(PMT) - 1] = crc & 0xFF;
 442
 443         // Set Audio PID
 444         buf[0] = 0xC1;
 445         buf[1] = (h->params.ts_pid_audio >> 8) & 0xFF;
 446         buf[2] = h->params.ts_pid_audio & 0xFF;
 447         i2c_master_send(client,buf,3);
 448
 449         // Set Video PID
 450         buf[0] = 0xC0;
 451         buf[1] = (h->params.ts_pid_video >> 8) & 0xFF;
 452         buf[2] = h->params.ts_pid_video & 0xFF;
 453         i2c_master_send(client,buf,3);
 454
 455         // Set PCR PID
 456         buf[0] = 0xC4;
 457         buf[1] = (h->params.ts_pid_pcr >> 8) & 0xFF;
 458         buf[2] = h->params.ts_pid_pcr & 0xFF;
 459         i2c_master_send(client,buf,3);
 460
 461         // Send SI tables
 462         i2c_master_send(client,localPAT,sizeof(PAT));
 463         i2c_master_send(client,localPMT,sizeof(PMT));
 464
 465         // mute then unmute audio. This removes buzzing artefacts
 466         buf[0] = 0xa4;
 467         buf[1] = 1;
 468         i2c_master_send(client, buf, 2);
 469         buf[1] = 0;
 470         i2c_master_send(client, buf, 2);
 471
 472         // start it going
 473         saa6752hs_chip_command(client, SAA6752HS_COMMAND_START);
 474
 475         // readout current state
 476         buf[0] = 0xE1;
 477         buf[1] = 0xA7;
 478         buf[2] = 0xFE;
 479         buf[3] = 0x82;
 480         buf[4] = 0xB0;
 481         i2c_master_send(client, buf, 5);
 482         i2c_master_recv(client, buf2, 4);
 483
 484         // change aspect ratio
 485         buf[0] = 0xE0;
 486         buf[1] = 0xA7;
 487         buf[2] = 0xFE;
 488         buf[3] = 0x82;
 489         buf[4] = 0xB0;
 490         buf[5] = buf2[0];
 491         switch(h->params.vi_aspect_ratio) {
 492         case V4L2_MPEG_ASPECT_16_9:
 493                 buf[6] = buf2[1] | 0x40;
 494                 break;
 495         case V4L2_MPEG_ASPECT_4_3:
 496         default:
 497                 buf[6] = buf2[1] & 0xBF;
 498                 break;
 499                 break;
 500         }
 501         buf[7] = buf2[2];
 502         buf[8] = buf2[3];
 503         i2c_master_send(client, buf, 9);
 504
 505         // return success
 506         return 0;
 507 }
 508
 509 static int saa6752hs_attach(struct i2c_adapter *adap, int addr, int kind)
 510 {
 511         struct saa6752hs_state *h;
 512
 513         printk("saa6752hs: chip found @ 0x%x\n", addr<<1);
 514
 515         if (NULL == (h = kmalloc(sizeof(*h), GFP_KERNEL)))
 516                 return -ENOMEM;
 517         memset(h,0,sizeof(*h));
 518         h->client = client_template;
 519         h->params = param_defaults;
 520         h->client.adapter = adap;
 521         h->client.addr = addr;
 522
 523         i2c_set_clientdata(&h->client, h);
 524         i2c_attach_client(&h->client);
 525         return 0;
 526 }
 527
 528 static int saa6752hs_probe(struct i2c_adapter *adap)
 529 {
 530         if (adap->class & I2C_CLASS_TV_ANALOG)
 531                 return i2c_probe(adap, &addr_data, saa6752hs_attach);
 532         return 0;
 533 }
 534
 535 static int saa6752hs_detach(struct i2c_client *client)
 536 {
 537         struct saa6752hs_state *h;
 538
 539         h = i2c_get_clientdata(client);
 540         i2c_detach_client(client);
 541         kfree(h);
 542         return 0;
 543 }
 544
 545 static int
 546 saa6752hs_command(struct i2c_client *client, unsigned int cmd, void *arg)
 547 {
 548         struct saa6752hs_state *h = i2c_get_clientdata(client);
 549         struct v4l2_mpeg_compression *params = arg;
 550         int err = 0;
 551
 552         switch (cmd) {
 553         case VIDIOC_S_MPEGCOMP:
 554                 if (NULL == params) {
 555                         /* apply settings and start encoder */
 556                         saa6752hs_init(client);
 557                         break;
 558                 }
 559                 saa6752hs_set_params(client, params);
 560                 /* fall through */
 561         case VIDIOC_G_MPEGCOMP:
 562                 *params = h->params;
 563                 break;
 564         case VIDIOC_G_FMT:
 565         {
 566            struct v4l2_format *f = arg;
 567
 568            if (h->video_format == SAA6752HS_VF_UNKNOWN)
 569                    h->video_format = SAA6752HS_VF_D1;
 570            f->fmt.pix.width =
 571                    v4l2_format_table[h->video_format].fmt.pix.width;
 572            f->fmt.pix.height =
 573                    v4l2_format_table[h->video_format].fmt.pix.height;
 574            break ;
 575         }
 576         case VIDIOC_S_FMT:
 577         {
 578                 struct v4l2_format *f = arg;
 579
 580                 saa6752hs_set_subsampling(client, f);
 581                 break;
 582         }
 583         default:
 584                 /* nothing */
 585                 break;
 586         }
 587
 588         return err;
 589 }
 590
 591 /* ----------------------------------------------------------------------- */
 592
 593 static struct i2c_driver driver = {
 594         .owner          = THIS_MODULE,
 595         .name           = "i2c saa6752hs MPEG encoder",
 596         .id             = I2C_DRIVERID_SAA6752HS,
 597         .flags          = I2C_DF_NOTIFY,
 598         .attach_adapter = saa6752hs_probe,
 599         .detach_client  = saa6752hs_detach,
 600         .command        = saa6752hs_command,
 601 };
 602
 603 static struct i2c_client client_template =
 604 {
 605         I2C_DEVNAME("saa6752hs"),
 606         .flags      = I2C_CLIENT_ALLOW_USE,
 607         .driver     = &driver,
 608 };
 609
 610 static int __init saa6752hs_init_module(void)
 611 {
 612         return i2c_add_driver(&driver);
 613 }
 614
 615 static void __exit saa6752hs_cleanup_module(void)
 616 {
 617         i2c_del_driver(&driver);
 618 }
 619
 620 module_init(saa6752hs_init_module);
 621 module_exit(saa6752hs_cleanup_module);
 622
 623 /*
 624  * Overrides for Emacs so that we follow Linus's tabbing style.
 625  * ---------------------------------------------------------------------------
 626  * Local variables:
 627  * c-basic-offset: 8
 628  * End:
 629  */