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 static unsigned short normal_i2c_range[] = {I2C_CLIENT_END};
  26 I2C_CLIENT_INSMOD;
  27
  28 MODULE_DESCRIPTION("device driver for saa6752hs MPEG2 encoder");
  29 MODULE_AUTHOR("Andrew de Quincey");
  30 MODULE_LICENSE("GPL");
  31
  32 static struct i2c_driver driver;
  33 static struct i2c_client client_template;
  34
  35 enum saa6752hs_videoformat {
  36         SAA6752HS_VF_D1 = 0,    /* standard D1 video format: 720x576 */
  37         SAA6752HS_VF_2_3_D1 = 1,/* 2/3D1 video format: 480x576 */
  38         SAA6752HS_VF_1_2_D1 = 2,/* 1/2D1 video format: 352x576 */
  39         SAA6752HS_VF_SIF = 3,   /* SIF video format: 352x288 */
  40         SAA6752HS_VF_UNKNOWN,
  41 };
  42
  43 static const struct v4l2_format v4l2_format_table[] =
  44 {
  45         [SAA6752HS_VF_D1] = {
  46                 .fmt.pix.width = 720, .fmt.pix.height = 576 },
  47         [SAA6752HS_VF_2_3_D1] = {
  48                 .fmt.pix.width = 480, .fmt.pix.height = 576 },
  49         [SAA6752HS_VF_1_2_D1] = {
  50                 .fmt.pix.width = 352, .fmt.pix.height = 576 },
  51         [SAA6752HS_VF_SIF] = {
  52                 .fmt.pix.width = 352, .fmt.pix.height = 288 },
  53         [SAA6752HS_VF_UNKNOWN] = {
  54                 .fmt.pix.width = 0, .fmt.pix.height = 0},
  55 };
  56
  57 struct saa6752hs_state {
  58         struct i2c_client             client;
  59         struct v4l2_mpeg_compression  params;
  60         enum saa6752hs_videoformat    video_format;
  61 };
  62
  63 enum saa6752hs_command {
  64         SAA6752HS_COMMAND_RESET = 0,
  65         SAA6752HS_COMMAND_STOP = 1,
  66         SAA6752HS_COMMAND_START = 2,
  67         SAA6752HS_COMMAND_PAUSE = 3,
  68         SAA6752HS_COMMAND_RECONFIGURE = 4,
  69         SAA6752HS_COMMAND_SLEEP = 5,
  70         SAA6752HS_COMMAND_RECONFIGURE_FORCE = 6,
  71
  72         SAA6752HS_COMMAND_MAX
  73 };
  74
  75 /* ---------------------------------------------------------------------- */
  76
  77 static u8 PAT[] = {
  78         0xc2, // i2c register
  79         0x00, // table number for encoder
  80
  81         0x47, // sync
  82         0x40, 0x00, // transport_error_indicator(0), payload_unit_start(1), transport_priority(0), pid(0)
  83         0x10, // transport_scrambling_control(00), adaptation_field_control(01), continuity_counter(0)
  84
  85         0x00, // PSI pointer to start of table
  86
  87         0x00, // tid(0)
  88         0xb0, 0x0d, // section_syntax_indicator(1), section_length(13)
  89
  90         0x00, 0x01, // transport_stream_id(1)
  91
  92         0xc1, // version_number(0), current_next_indicator(1)
  93
  94         0x00, 0x00, // section_number(0), last_section_number(0)
  95
  96         0x00, 0x01, // program_number(1)
  97
  98         0xe0, 0x00, // PMT PID
  99
 100         0x00, 0x00, 0x00, 0x00 // CRC32
 101 };
 102
 103 static u8 PMT[] = {
 104         0xc2, // i2c register
 105         0x01, // table number for encoder
 106
 107         0x47, // sync
 108         0x40, 0x00, // transport_error_indicator(0), payload_unit_start(1), transport_priority(0), pid
 109         0x10, // transport_scrambling_control(00), adaptation_field_control(01), continuity_counter(0)
 110
 111         0x00, // PSI pointer to start of table
 112
 113         0x02, // tid(2)
 114         0xb0, 0x17, // section_syntax_indicator(1), section_length(23)
 115
 116         0x00, 0x01, // program_number(1)
 117
 118         0xc1, // version_number(0), current_next_indicator(1)
 119
 120         0x00, 0x00, // section_number(0), last_section_number(0)
 121
 122         0xe0, 0x00, // PCR_PID
 123
 124         0xf0, 0x00, // program_info_length(0)
 125
 126         0x02, 0xe0, 0x00, 0xf0, 0x00, // video stream type(2), pid
 127         0x04, 0xe0, 0x00, 0xf0, 0x00, // audio stream type(4), pid
 128
 129         0x00, 0x00, 0x00, 0x00 // CRC32
 130 };
 131
 132 static struct v4l2_mpeg_compression param_defaults =
 133 {
 134         .st_type         = V4L2_MPEG_TS_2,
 135         .st_bitrate      = {
 136                 .mode    = V4L2_BITRATE_CBR,
 137                 .target  = 7000,
 138         },
 139
 140         .ts_pid_pmt      = 16,
 141         .ts_pid_video    = 260,
 142         .ts_pid_audio    = 256,
 143         .ts_pid_pcr      = 259,
 144
 145         .vi_type         = V4L2_MPEG_VI_2,
 146         .vi_aspect_ratio = V4L2_MPEG_ASPECT_4_3,
 147         .vi_bitrate      = {
 148                 .mode    = V4L2_BITRATE_VBR,
 149                 .target  = 4000,
 150                 .max     = 6000,
 151         },
 152
 153         .au_type         = V4L2_MPEG_AU_2_II,
 154         .au_bitrate      = {
 155                 .mode    = V4L2_BITRATE_CBR,
 156                 .target  = 256,
 157         },
 158
 159 #if 0
 160         /* FIXME: size? via S_FMT? */
 161         .video_format = MPEG_VIDEO_FORMAT_D1,
 162 #endif
 163 };
 164
 165 /* ---------------------------------------------------------------------- */
 166
 167 static int saa6752hs_chip_command(struct i2c_client* client,
 168                                   enum saa6752hs_command command)
 169 {
 170         unsigned char buf[3];
 171         unsigned long timeout;
 172         int status = 0;
 173
 174         // execute the command
 175         switch(command) {
 176         case SAA6752HS_COMMAND_RESET:
 177                 buf[0] = 0x00;
 178                 break;
 179
 180         case SAA6752HS_COMMAND_STOP:
 181                 buf[0] = 0x03;
 182                 break;
 183
 184         case SAA6752HS_COMMAND_START:
 185                 buf[0] = 0x02;
 186                 break;
 187
 188         case SAA6752HS_COMMAND_PAUSE:
 189                 buf[0] = 0x04;
 190                 break;
 191
 192         case SAA6752HS_COMMAND_RECONFIGURE:
 193                 buf[0] = 0x05;
 194                 break;
 195
 196         case SAA6752HS_COMMAND_SLEEP:
 197                 buf[0] = 0x06;
 198                 break;
 199
 200         case SAA6752HS_COMMAND_RECONFIGURE_FORCE:
 201                 buf[0] = 0x07;
 202                 break;
 203
 204         default:
 205                 return -EINVAL;
 206         }
 207
 208         // set it and wait for it to be so
 209         i2c_master_send(client, buf, 1);
 210         timeout = jiffies + HZ * 3;
 211         for (;;) {
 212                 // get the current status
 213                 buf[0] = 0x10;
 214                 i2c_master_send(client, buf, 1);
 215                 i2c_master_recv(client, buf, 1);
 216
 217                 if (!(buf[0] & 0x20))
 218                         break;
 219                 if (time_after(jiffies,timeout)) {
 220                         status = -ETIMEDOUT;
 221                         break;
 222                 }
 223
 224                 // wait a bit
 225                 msleep(10);
 226         }
 227
 228         // delay a bit to let encoder settle
 229         msleep(50);
 230
 231         // done
 232         return status;
 233 }
 234
 235
 236 static int saa6752hs_set_bitrate(struct i2c_client* client,
 237                                  struct v4l2_mpeg_compression* params)
 238 {
 239         u8 buf[3];
 240
 241         // set the bitrate mode
 242         buf[0] = 0x71;
 243         buf[1] = (params->vi_bitrate.mode == V4L2_BITRATE_VBR) ? 0 : 1;
 244         i2c_master_send(client, buf, 2);
 245
 246         // set the video bitrate
 247         if (params->vi_bitrate.mode == V4L2_BITRATE_VBR) {
 248                 // set the target bitrate
 249                 buf[0] = 0x80;
 250                 buf[1] = params->vi_bitrate.target >> 8;
 251                 buf[2] = params->vi_bitrate.target & 0xff;
 252                 i2c_master_send(client, buf, 3);
 253
 254                 // set the max bitrate
 255                 buf[0] = 0x81;
 256                 buf[1] = params->vi_bitrate.max >> 8;
 257                 buf[2] = params->vi_bitrate.max & 0xff;
 258                 i2c_master_send(client, buf, 3);
 259         } else {
 260                 // set the target bitrate (no max bitrate for CBR)
 261                 buf[0] = 0x81;
 262                 buf[1] = params->vi_bitrate.target >> 8;
 263                 buf[2] = params->vi_bitrate.target & 0xff;
 264                 i2c_master_send(client, buf, 3);
 265         }
 266
 267         // set the audio bitrate
 268         buf[0] = 0x94;
 269         buf[1] = (256 == params->au_bitrate.target) ? 0 : 1;
 270         i2c_master_send(client, buf, 2);
 271
 272         // set the total bitrate
 273         buf[0] = 0xb1;
 274         buf[1] = params->st_bitrate.target >> 8;
 275         buf[2] = params->st_bitrate.target & 0xff;
 276         i2c_master_send(client, buf, 3);
 277
 278         // return success
 279         return 0;
 280 }
 281
 282 static void saa6752hs_set_subsampling(struct i2c_client* client,
 283                                       struct v4l2_format* f)
 284 {
 285         struct saa6752hs_state *h = i2c_get_clientdata(client);
 286         int dist_352, dist_480, dist_720;
 287
 288         /*
 289           FIXME: translate and round width/height into EMPRESS
 290           subsample type:
 291
 292           type   |   PAL   |  NTSC
 293           ---------------------------
 294           SIF    | 352x288 | 352x240
 295           1/2 D1 | 352x576 | 352x480
 296           2/3 D1 | 480x576 | 480x480
 297           D1     | 720x576 | 720x480
 298         */
 299
 300         dist_352 = abs(f->fmt.pix.width - 352);
 301         dist_480 = abs(f->fmt.pix.width - 480);
 302         dist_720 = abs(f->fmt.pix.width - 720);
 303         if (dist_720 < dist_480) {
 304                 f->fmt.pix.width = 720;
 305                 f->fmt.pix.height = 576;
 306                 h->video_format = SAA6752HS_VF_D1;
 307         }
 308         else if (dist_480 < dist_352) {
 309                 f->fmt.pix.width = 480;
 310                 f->fmt.pix.height = 576;
 311                 h->video_format = SAA6752HS_VF_2_3_D1;
 312         }
 313         else {
 314                 f->fmt.pix.width = 352;
 315                 if (abs(f->fmt.pix.height - 576) <
 316                     abs(f->fmt.pix.height - 288)) {
 317                         f->fmt.pix.height = 576;
 318                         h->video_format = SAA6752HS_VF_1_2_D1;
 319                 }
 320                 else {
 321                         f->fmt.pix.height = 288;
 322                         h->video_format = SAA6752HS_VF_SIF;
 323                 }
 324         }
 325 }
 326
 327
 328 static void saa6752hs_set_params(struct i2c_client* client,
 329                                  struct v4l2_mpeg_compression* params)
 330 {
 331         struct saa6752hs_state *h = i2c_get_clientdata(client);
 332
 333         /* check PIDs */
 334         if (params->ts_pid_pmt <= MPEG_PID_MAX)
 335                 h->params.ts_pid_pmt = params->ts_pid_pmt;
 336         if (params->ts_pid_pcr <= MPEG_PID_MAX)
 337                 h->params.ts_pid_pcr = params->ts_pid_pcr;
 338         if (params->ts_pid_video <= MPEG_PID_MAX)
 339                 h->params.ts_pid_video = params->ts_pid_video;
 340         if (params->ts_pid_audio <= MPEG_PID_MAX)
 341                 h->params.ts_pid_audio = params->ts_pid_audio;
 342
 343         /* check bitrate parameters */
 344         if ((params->vi_bitrate.mode == V4L2_BITRATE_CBR) ||
 345             (params->vi_bitrate.mode == V4L2_BITRATE_VBR))
 346                 h->params.vi_bitrate.mode = params->vi_bitrate.mode;
 347         if (params->vi_bitrate.mode != V4L2_BITRATE_NONE)
 348                 h->params.st_bitrate.target = params->st_bitrate.target;
 349         if (params->vi_bitrate.mode != V4L2_BITRATE_NONE)
 350                 h->params.vi_bitrate.target = params->vi_bitrate.target;
 351         if (params->vi_bitrate.mode == V4L2_BITRATE_VBR)
 352                 h->params.vi_bitrate.max = params->vi_bitrate.max;
 353         if (params->au_bitrate.mode != V4L2_BITRATE_NONE)
 354                 h->params.au_bitrate.target = params->au_bitrate.target;
 355
 356         /* aspect ratio */
 357         if (params->vi_aspect_ratio == V4L2_MPEG_ASPECT_4_3 ||
 358             params->vi_aspect_ratio == V4L2_MPEG_ASPECT_16_9)
 359                 h->params.vi_aspect_ratio = params->vi_aspect_ratio;
 360
 361         /* range checks */
 362         if (h->params.st_bitrate.target > MPEG_TOTAL_TARGET_BITRATE_MAX)
 363                 h->params.st_bitrate.target = MPEG_TOTAL_TARGET_BITRATE_MAX;
 364         if (h->params.vi_bitrate.target > MPEG_VIDEO_TARGET_BITRATE_MAX)
 365                 h->params.vi_bitrate.target = MPEG_VIDEO_TARGET_BITRATE_MAX;
 366         if (h->params.vi_bitrate.max > MPEG_VIDEO_MAX_BITRATE_MAX)
 367                 h->params.vi_bitrate.max = MPEG_VIDEO_MAX_BITRATE_MAX;
 368         if (h->params.au_bitrate.target <= 256)
 369                 h->params.au_bitrate.target = 256;
 370         else
 371                 h->params.au_bitrate.target = 384;
 372 }
 373
 374 static int saa6752hs_init(struct i2c_client* client)
 375 {
 376         unsigned char buf[9], buf2[4];
 377         struct saa6752hs_state *h;
 378         u32 crc;
 379         unsigned char localPAT[256];
 380         unsigned char localPMT[256];
 381
 382         h = i2c_get_clientdata(client);
 383
 384         // Set video format - must be done first as it resets other settings
 385         buf[0] = 0x41;
 386         buf[1] = h->video_format;
 387         i2c_master_send(client, buf, 2);
 388
 389         // set bitrate
 390         saa6752hs_set_bitrate(client, &h->params);
 391
 392         // Set GOP structure {3, 13}
 393         buf[0] = 0x72;
 394         buf[1] = 0x03;
 395         buf[2] = 0x0D;
 396         i2c_master_send(client,buf,3);
 397
 398         // Set minimum Q-scale {4}
 399         buf[0] = 0x82;
 400         buf[1] = 0x04;
 401         i2c_master_send(client,buf,2);
 402
 403         // Set maximum Q-scale {12}
 404         buf[0] = 0x83;
 405         buf[1] = 0x0C;
 406         i2c_master_send(client,buf,2);
 407
 408         // Set Output Protocol
 409         buf[0] = 0xD0;
 410         buf[1] = 0x81;
 411         i2c_master_send(client,buf,2);
 412
 413         // Set video output stream format {TS}
 414         buf[0] = 0xB0;
 415         buf[1] = 0x05;
 416         i2c_master_send(client,buf,2);
 417
 418         /* compute PAT */
 419         memcpy(localPAT, PAT, sizeof(PAT));
 420         localPAT[17] = 0xe0 | ((h->params.ts_pid_pmt >> 8) & 0x0f);
 421         localPAT[18] = h->params.ts_pid_pmt & 0xff;
 422         crc = crc32_be(~0, &localPAT[7], sizeof(PAT) - 7 - 4);
 423         localPAT[sizeof(PAT) - 4] = (crc >> 24) & 0xFF;
 424         localPAT[sizeof(PAT) - 3] = (crc >> 16) & 0xFF;
 425         localPAT[sizeof(PAT) - 2] = (crc >> 8) & 0xFF;
 426         localPAT[sizeof(PAT) - 1] = crc & 0xFF;
 427
 428         /* compute PMT */
 429         memcpy(localPMT, PMT, sizeof(PMT));
 430         localPMT[3] = 0x40 | ((h->params.ts_pid_pmt >> 8) & 0x0f);
 431         localPMT[4] = h->params.ts_pid_pmt & 0xff;
 432         localPMT[15] = 0xE0 | ((h->params.ts_pid_pcr >> 8) & 0x0F);
 433         localPMT[16] = h->params.ts_pid_pcr & 0xFF;
 434         localPMT[20] = 0xE0 | ((h->params.ts_pid_video >> 8) & 0x0F);
 435         localPMT[21] = h->params.ts_pid_video & 0xFF;
 436         localPMT[25] = 0xE0 | ((h->params.ts_pid_audio >> 8) & 0x0F);
 437         localPMT[26] = h->params.ts_pid_audio & 0xFF;
 438         crc = crc32_be(~0, &localPMT[7], sizeof(PMT) - 7 - 4);
 439         localPMT[sizeof(PMT) - 4] = (crc >> 24) & 0xFF;
 440         localPMT[sizeof(PMT) - 3] = (crc >> 16) & 0xFF;
 441         localPMT[sizeof(PMT) - 2] = (crc >> 8) & 0xFF;
 442         localPMT[sizeof(PMT) - 1] = crc & 0xFF;
 443
 444         // Set Audio PID
 445         buf[0] = 0xC1;
 446         buf[1] = (h->params.ts_pid_audio >> 8) & 0xFF;
 447         buf[2] = h->params.ts_pid_audio & 0xFF;
 448         i2c_master_send(client,buf,3);
 449
 450         // Set Video PID
 451         buf[0] = 0xC0;
 452         buf[1] = (h->params.ts_pid_video >> 8) & 0xFF;
 453         buf[2] = h->params.ts_pid_video & 0xFF;
 454         i2c_master_send(client,buf,3);
 455
 456         // Set PCR PID
 457         buf[0] = 0xC4;
 458         buf[1] = (h->params.ts_pid_pcr >> 8) & 0xFF;
 459         buf[2] = h->params.ts_pid_pcr & 0xFF;
 460         i2c_master_send(client,buf,3);
 461
 462         // Send SI tables
 463         i2c_master_send(client,localPAT,sizeof(PAT));
 464         i2c_master_send(client,localPMT,sizeof(PMT));
 465
 466         // mute then unmute audio. This removes buzzing artefacts
 467         buf[0] = 0xa4;
 468         buf[1] = 1;
 469         i2c_master_send(client, buf, 2);
 470         buf[1] = 0;
 471         i2c_master_send(client, buf, 2);
 472
 473         // start it going
 474         saa6752hs_chip_command(client, SAA6752HS_COMMAND_START);
 475
 476         // readout current state
 477         buf[0] = 0xE1;
 478         buf[1] = 0xA7;
 479         buf[2] = 0xFE;
 480         buf[3] = 0x82;
 481         buf[4] = 0xB0;
 482         i2c_master_send(client, buf, 5);
 483         i2c_master_recv(client, buf2, 4);
 484
 485         // change aspect ratio
 486         buf[0] = 0xE0;
 487         buf[1] = 0xA7;
 488         buf[2] = 0xFE;
 489         buf[3] = 0x82;
 490         buf[4] = 0xB0;
 491         buf[5] = buf2[0];
 492         switch(h->params.vi_aspect_ratio) {
 493         case V4L2_MPEG_ASPECT_16_9:
 494                 buf[6] = buf2[1] | 0x40;
 495                 break;
 496         case V4L2_MPEG_ASPECT_4_3:
 497         default:
 498                 buf[6] = buf2[1] & 0xBF;
 499                 break;
 500                 break;
 501         }
 502         buf[7] = buf2[2];
 503         buf[8] = buf2[3];
 504         i2c_master_send(client, buf, 9);
 505
 506         // return success
 507         return 0;
 508 }
 509
 510 static int saa6752hs_attach(struct i2c_adapter *adap, int addr, int kind)
 511 {
 512         struct saa6752hs_state *h;
 513
 514         printk("saa6752hs: chip found @ 0x%x\n", addr<<1);
 515
 516         if (NULL == (h = kmalloc(sizeof(*h), GFP_KERNEL)))
 517                 return -ENOMEM;
 518         memset(h,0,sizeof(*h));
 519         h->client = client_template;
 520         h->params = param_defaults;
 521         h->client.adapter = adap;
 522         h->client.addr = addr;
 523
 524         i2c_set_clientdata(&h->client, h);
 525         i2c_attach_client(&h->client);
 526         return 0;
 527 }
 528
 529 static int saa6752hs_probe(struct i2c_adapter *adap)
 530 {
 531         if (adap->class & I2C_CLASS_TV_ANALOG)
 532                 return i2c_probe(adap, &addr_data, saa6752hs_attach);
 533         return 0;
 534 }
 535
 536 static int saa6752hs_detach(struct i2c_client *client)
 537 {
 538         struct saa6752hs_state *h;
 539
 540         h = i2c_get_clientdata(client);
 541         i2c_detach_client(client);
 542         kfree(h);
 543         return 0;
 544 }
 545
 546 static int
 547 saa6752hs_command(struct i2c_client *client, unsigned int cmd, void *arg)
 548 {
 549         struct saa6752hs_state *h = i2c_get_clientdata(client);
 550         struct v4l2_mpeg_compression *params = arg;
 551         int err = 0;
 552
 553         switch (cmd) {
 554         case VIDIOC_S_MPEGCOMP:
 555                 if (NULL == params) {
 556                         /* apply settings and start encoder */
 557                         saa6752hs_init(client);
 558                         break;
 559                 }
 560                 saa6752hs_set_params(client, params);
 561                 /* fall through */
 562         case VIDIOC_G_MPEGCOMP:
 563                 *params = h->params;
 564                 break;
 565         case VIDIOC_G_FMT:
 566         {
 567            struct v4l2_format *f = arg;
 568
 569            if (h->video_format == SAA6752HS_VF_UNKNOWN)
 570                    h->video_format = SAA6752HS_VF_D1;
 571            f->fmt.pix.width =
 572                    v4l2_format_table[h->video_format].fmt.pix.width;
 573            f->fmt.pix.height =
 574                    v4l2_format_table[h->video_format].fmt.pix.height;
 575            break ;
 576         }
 577         case VIDIOC_S_FMT:
 578         {
 579                 struct v4l2_format *f = arg;
 580
 581                 saa6752hs_set_subsampling(client, f);
 582                 break;
 583         }
 584         default:
 585                 /* nothing */
 586                 break;
 587         }
 588
 589         return err;
 590 }
 591
 592 /* ----------------------------------------------------------------------- */
 593
 594 static struct i2c_driver driver = {
 595         .owner          = THIS_MODULE,
 596         .name           = "i2c saa6752hs MPEG encoder",
 597         .id             = I2C_DRIVERID_SAA6752HS,
 598         .flags          = I2C_DF_NOTIFY,
 599         .attach_adapter = saa6752hs_probe,
 600         .detach_client  = saa6752hs_detach,
 601         .command        = saa6752hs_command,
 602 };
 603
 604 static struct i2c_client client_template =
 605 {
 606         I2C_DEVNAME("saa6752hs"),
 607         .flags      = I2C_CLIENT_ALLOW_USE,
 608         .driver     = &driver,
 609 };
 610
 611 static int __init saa6752hs_init_module(void)
 612 {
 613         return i2c_add_driver(&driver);
 614 }
 615
 616 static void __exit saa6752hs_cleanup_module(void)
 617 {
 618         i2c_del_driver(&driver);
 619 }
 620
 621 module_init(saa6752hs_init_module);
 622 module_exit(saa6752hs_cleanup_module);
 623
 624 /*
 625  * Overrides for Emacs so that we follow Linus's tabbing style.
 626  * ---------------------------------------------------------------------------
 627  * Local variables:
 628  * c-basic-offset: 8
 629  * End:
 630  */