drivers/media/video/saa7110.c

   1 /*
   2  * saa7110 - Philips SAA7110(A) video decoder driver
   3  *
   4  * Copyright (C) 1998 Pauline Middelink <middelin@polyware.nl>
   5  *
   6  * Copyright (C) 1999 Wolfgang Scherr <scherr@net4you.net>
   7  * Copyright (C) 2000 Serguei Miridonov <mirsev@cicese.mx>
   8  *    - some corrections for Pinnacle Systems Inc. DC10plus card.
   9  *
  10  * Changes by Ronald Bultje <rbultje@ronald.bitfreak.net>
  11  *    - moved over to linux>=2.4.x i2c protocol (1/1/2003)
  12  *
  13  * This program is free software; you can redistribute it and/or modify
  14  * it under the terms of the GNU General Public License as published by
  15  * the Free Software Foundation; either version 2 of the License, or
  16  * (at your option) any later version.
  17  *
  18  * This program is distributed in the hope that it will be useful,
  19  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  20  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21  * GNU General Public License for more details.
  22  *
  23  * You should have received a copy of the GNU General Public License
  24  * along with this program; if not, write to the Free Software
  25  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  26  */
  27
  28 #include <linux/module.h>
  29 #include <linux/init.h>
  30 #include <linux/types.h>
  31 #include <linux/delay.h>
  32 #include <linux/slab.h>
  33 #include <asm/io.h>
  34 #include <asm/uaccess.h>
  35
  36 MODULE_DESCRIPTION("Philips SAA7110 video decoder driver");
  37 MODULE_AUTHOR("Pauline Middelink");
  38 MODULE_LICENSE("GPL");
  39
  40 #include <linux/i2c.h>
  41 #include <linux/i2c-dev.h>
  42
  43 #define I2C_NAME(s) (s)->name
  44
  45 #include <linux/videodev.h>
  46 #include <linux/video_decoder.h>
  47
  48 static int debug = 0;
  49 MODULE_PARM(debug, "i");
  50 MODULE_PARM_DESC(debug, "Debug level (0-1)");
  51
  52 #define dprintk(num, format, args...) \
  53         do { \
  54                 if (debug >= num) \
  55                         printk(format, ##args); \
  56         } while (0)
  57
  58 #define SAA7110_MAX_INPUT       9       /* 6 CVBS, 3 SVHS */
  59 #define SAA7110_MAX_OUTPUT      0       /* its a decoder only */
  60
  61 #define I2C_SAA7110             0x9C    /* or 0x9E */
  62
  63 struct saa7110 {
  64         unsigned char reg[54];
  65
  66         int norm;
  67         int input;
  68         int enable;
  69         int bright;
  70         int contrast;
  71         int hue;
  72         int sat;
  73
  74         wait_queue_head_t wq;
  75 };
  76
  77 /* ----------------------------------------------------------------------- */
  78 /* I2C support functions                                                   */
  79 /* ----------------------------------------------------------------------- */
  80
  81 static int
  82 saa7110_write (struct i2c_client *client,
  83                u8                 reg,
  84                u8                 value)
  85 {
  86         struct saa7110 *decoder = i2c_get_clientdata(client);
  87
  88         decoder->reg[reg] = value;
  89         return i2c_smbus_write_byte_data(client, reg, value);
  90 }
  91
  92 static int
  93 saa7110_write_block (struct i2c_client *client,
  94                      const u8          *data,
  95                      unsigned int       len)
  96 {
  97         int ret = -1;
  98         u8 reg = *data++;
  99
 100         len--;
 101
 102         /* the saa7110 has an autoincrement function, use it if
 103          * the adapter understands raw I2C */
 104         if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
 105                 struct saa7110 *decoder = i2c_get_clientdata(client);
 106                 struct i2c_msg msg;
 107                 u8 block_data[54];
 108
 109                 msg.len = 0;
 110                 msg.buf = (char *) block_data;
 111                 msg.addr = client->addr;
 112                 msg.flags = client->flags;
 113                 while (len >= 1) {
 114                         msg.len = 0;
 115                         block_data[msg.len++] = reg;
 116                         while (len-- >= 1 && msg.len < 54)
 117                                 block_data[msg.len++] =
 118                                     decoder->reg[reg++] = *data++;
 119                         ret = i2c_transfer(client->adapter, &msg, 1);
 120                 }
 121         } else {
 122                 while (len-- >= 1) {
 123                         if ((ret = saa7110_write(client, reg++,
 124                                                  *data++)) < 0)
 125                                 break;
 126                 }
 127         }
 128
 129         return ret;
 130 }
 131
 132 static inline int
 133 saa7110_read (struct i2c_client *client)
 134 {
 135         return i2c_smbus_read_byte(client);
 136 }
 137
 138 /* ----------------------------------------------------------------------- */
 139 /* SAA7110 functions                                                       */
 140 /* ----------------------------------------------------------------------- */
 141
 142 #define FRESP_06H_COMPST 0x03   //0x13
 143 #define FRESP_06H_SVIDEO 0x83   //0xC0
 144
 145
 146 static int
 147 saa7110_selmux (struct i2c_client *client,
 148                 int                chan)
 149 {
 150         static const unsigned char modes[9][8] = {
 151                 /* mode 0 */
 152                 {FRESP_06H_COMPST, 0xD9, 0x17, 0x40, 0x03,
 153                               0x44, 0x75, 0x16},
 154                 /* mode 1 */
 155                 {FRESP_06H_COMPST, 0xD8, 0x17, 0x40, 0x03,
 156                               0x44, 0x75, 0x16},
 157                 /* mode 2 */
 158                 {FRESP_06H_COMPST, 0xBA, 0x07, 0x91, 0x03,
 159                               0x60, 0xB5, 0x05},
 160                 /* mode 3 */
 161                 {FRESP_06H_COMPST, 0xB8, 0x07, 0x91, 0x03,
 162                               0x60, 0xB5, 0x05},
 163                 /* mode 4 */
 164                 {FRESP_06H_COMPST, 0x7C, 0x07, 0xD2, 0x83,
 165                               0x60, 0xB5, 0x03},
 166                 /* mode 5 */
 167                 {FRESP_06H_COMPST, 0x78, 0x07, 0xD2, 0x83,
 168                               0x60, 0xB5, 0x03},
 169                 /* mode 6 */
 170                 {FRESP_06H_SVIDEO, 0x59, 0x17, 0x42, 0xA3,
 171                               0x44, 0x75, 0x12},
 172                 /* mode 7 */
 173                 {FRESP_06H_SVIDEO, 0x9A, 0x17, 0xB1, 0x13,
 174                               0x60, 0xB5, 0x14},
 175                 /* mode 8 */
 176                 {FRESP_06H_SVIDEO, 0x3C, 0x27, 0xC1, 0x23,
 177                               0x44, 0x75, 0x21}
 178         };
 179         struct saa7110 *decoder = i2c_get_clientdata(client);
 180         const unsigned char *ptr = modes[chan];
 181
 182         saa7110_write(client, 0x06, ptr[0]);    /* Luminance control    */
 183         saa7110_write(client, 0x20, ptr[1]);    /* Analog Control #1    */
 184         saa7110_write(client, 0x21, ptr[2]);    /* Analog Control #2    */
 185         saa7110_write(client, 0x22, ptr[3]);    /* Mixer Control #1     */
 186         saa7110_write(client, 0x2C, ptr[4]);    /* Mixer Control #2     */
 187         saa7110_write(client, 0x30, ptr[5]);    /* ADCs gain control    */
 188         saa7110_write(client, 0x31, ptr[6]);    /* Mixer Control #3     */
 189         saa7110_write(client, 0x21, ptr[7]);    /* Analog Control #2    */
 190         decoder->input = chan;
 191
 192         return 0;
 193 }
 194
 195 static const unsigned char initseq[] = {
 196         0, 0x4C, 0x3C, 0x0D, 0xEF, 0xBD, 0xF2, 0x03, 0x00,
 197         /* 0x08 */ 0xF8, 0xF8, 0x60, 0x60, 0x00, 0x86, 0x18, 0x90,
 198         /* 0x10 */ 0x00, 0x59, 0x40, 0x46, 0x42, 0x1A, 0xFF, 0xDA,
 199         /* 0x18 */ 0xF2, 0x8B, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 200         /* 0x20 */ 0xD9, 0x16, 0x40, 0x41, 0x80, 0x41, 0x80, 0x4F,
 201         /* 0x28 */ 0xFE, 0x01, 0xCF, 0x0F, 0x03, 0x01, 0x03, 0x0C,
 202         /* 0x30 */ 0x44, 0x71, 0x02, 0x8C, 0x02
 203 };
 204
 205 static int
 206 determine_norm (struct i2c_client *client)
 207 {
 208         struct saa7110 *decoder = i2c_get_clientdata(client);
 209         int status;
 210
 211         /* mode changed, start automatic detection */
 212         saa7110_write_block(client, initseq, sizeof(initseq));
 213         saa7110_selmux(client, decoder->input);
 214         sleep_on_timeout(&decoder->wq, HZ / 4);
 215         status = saa7110_read(client);
 216         if (status & 0x40) {
 217                 dprintk(1, KERN_INFO "%s: status=0x%02x (no signal)\n",
 218                         I2C_NAME(client), status);
 219                 return decoder->norm;   // no change
 220         }
 221         if ((status & 3) == 0) {
 222                 saa7110_write(client, 0x06, 0x83);
 223                 if (status & 0x20) {
 224                         dprintk(1,
 225                                 KERN_INFO
 226                                 "%s: status=0x%02x (NTSC/no color)\n",
 227                                 I2C_NAME(client), status);
 228                         //saa7110_write(client,0x2E,0x81);
 229                         return VIDEO_MODE_NTSC;
 230                 }
 231                 dprintk(1, KERN_INFO "%s: status=0x%02x (PAL/no color)\n",
 232                         I2C_NAME(client), status);
 233                 //saa7110_write(client,0x2E,0x9A);
 234                 return VIDEO_MODE_PAL;
 235         }
 236         //saa7110_write(client,0x06,0x03);
 237         if (status & 0x20) {    /* 60Hz */
 238                 dprintk(1, KERN_INFO "%s: status=0x%02x (NTSC)\n",
 239                         I2C_NAME(client), status);
 240                 saa7110_write(client, 0x0D, 0x86);
 241                 saa7110_write(client, 0x0F, 0x50);
 242                 saa7110_write(client, 0x11, 0x2C);
 243                 //saa7110_write(client,0x2E,0x81);
 244                 return VIDEO_MODE_NTSC;
 245         }
 246
 247         /* 50Hz -> PAL/SECAM */
 248         saa7110_write(client, 0x0D, 0x86);
 249         saa7110_write(client, 0x0F, 0x10);
 250         saa7110_write(client, 0x11, 0x59);
 251         //saa7110_write(client,0x2E,0x9A);
 252
 253         sleep_on_timeout(&decoder->wq, HZ / 4);
 254
 255         status = saa7110_read(client);
 256         if ((status & 0x03) == 0x01) {
 257                 dprintk(1, KERN_INFO "%s: status=0x%02x (SECAM)\n",
 258                         I2C_NAME(client), status);
 259                 saa7110_write(client, 0x0D, 0x87);
 260                 return VIDEO_MODE_SECAM;
 261         }
 262         dprintk(1, KERN_INFO "%s: status=0x%02x (PAL)\n", I2C_NAME(client),
 263                 status);
 264         return VIDEO_MODE_PAL;
 265 }
 266
 267 static int
 268 saa7110_command (struct i2c_client *client,
 269                  unsigned int       cmd,
 270                  void              *arg)
 271 {
 272         struct saa7110 *decoder = i2c_get_clientdata(client);
 273         int v;
 274
 275         switch (cmd) {
 276         case 0:
 277                 //saa7110_write_block(client, initseq, sizeof(initseq));
 278                 break;
 279
 280         case DECODER_GET_CAPABILITIES:
 281         {
 282                 struct video_decoder_capability *dc = arg;
 283
 284                 dc->flags =
 285                     VIDEO_DECODER_PAL | VIDEO_DECODER_NTSC |
 286                     VIDEO_DECODER_SECAM | VIDEO_DECODER_AUTO;
 287                 dc->inputs = SAA7110_MAX_INPUT;
 288                 dc->outputs = SAA7110_MAX_OUTPUT;
 289         }
 290                 break;
 291
 292         case DECODER_GET_STATUS:
 293         {
 294                 int status;
 295                 int res = 0;
 296
 297                 status = saa7110_read(client);
 298                 dprintk(1, KERN_INFO "%s: status=0x%02x norm=%d\n",
 299                         I2C_NAME(client), status, decoder->norm);
 300                 if (!(status & 0x40))
 301                         res |= DECODER_STATUS_GOOD;
 302                 if (status & 0x03)
 303                         res |= DECODER_STATUS_COLOR;
 304
 305                 switch (decoder->norm) {
 306                 case VIDEO_MODE_NTSC:
 307                         res |= DECODER_STATUS_NTSC;
 308                         break;
 309                 case VIDEO_MODE_PAL:
 310                         res |= DECODER_STATUS_PAL;
 311                         break;
 312                 case VIDEO_MODE_SECAM:
 313                         res |= DECODER_STATUS_SECAM;
 314                         break;
 315                 }
 316                 *(int *) arg = res;
 317         }
 318                 break;
 319
 320         case DECODER_SET_NORM:
 321                 v = *(int *) arg;
 322                 if (decoder->norm != v) {
 323                         decoder->norm = v;
 324                         //saa7110_write(client, 0x06, 0x03);
 325                         switch (v) {
 326                         case VIDEO_MODE_NTSC:
 327                                 saa7110_write(client, 0x0D, 0x86);
 328                                 saa7110_write(client, 0x0F, 0x50);
 329                                 saa7110_write(client, 0x11, 0x2C);
 330                                 //saa7110_write(client, 0x2E, 0x81);
 331                                 dprintk(1,
 332                                         KERN_INFO "%s: switched to NTSC\n",
 333                                         I2C_NAME(client));
 334                                 break;
 335                         case VIDEO_MODE_PAL:
 336                                 saa7110_write(client, 0x0D, 0x86);
 337                                 saa7110_write(client, 0x0F, 0x10);
 338                                 saa7110_write(client, 0x11, 0x59);
 339                                 //saa7110_write(client, 0x2E, 0x9A);
 340                                 dprintk(1,
 341                                         KERN_INFO "%s: switched to PAL\n",
 342                                         I2C_NAME(client));
 343                                 break;
 344                         case VIDEO_MODE_SECAM:
 345                                 saa7110_write(client, 0x0D, 0x87);
 346                                 saa7110_write(client, 0x0F, 0x10);
 347                                 saa7110_write(client, 0x11, 0x59);
 348                                 //saa7110_write(client, 0x2E, 0x9A);
 349                                 dprintk(1,
 350                                         KERN_INFO
 351                                         "%s: switched to SECAM\n",
 352                                         I2C_NAME(client));
 353                                 break;
 354                         case VIDEO_MODE_AUTO:
 355                                 dprintk(1,
 356                                         KERN_INFO
 357                                         "%s: TV standard detection...\n",
 358                                         I2C_NAME(client));
 359                                 decoder->norm = determine_norm(client);
 360                                 *(int *) arg = decoder->norm;
 361                                 break;
 362                         default:
 363                                 return -EPERM;
 364                         }
 365                 }
 366                 break;
 367
 368         case DECODER_SET_INPUT:
 369                 v = *(int *) arg;
 370                 if (v < 0 || v > SAA7110_MAX_INPUT) {
 371                         dprintk(1,
 372                                 KERN_INFO "%s: input=%d not available\n",
 373                                 I2C_NAME(client), v);
 374                         return -EINVAL;
 375                 }
 376                 if (decoder->input != v) {
 377                         saa7110_selmux(client, v);
 378                         dprintk(1, KERN_INFO "%s: switched to input=%d\n",
 379                                 I2C_NAME(client), v);
 380                 }
 381                 break;
 382
 383         case DECODER_SET_OUTPUT:
 384                 v = *(int *) arg;
 385                 /* not much choice of outputs */
 386                 if (v != 0)
 387                         return -EINVAL;
 388                 break;
 389
 390         case DECODER_ENABLE_OUTPUT:
 391                 v = *(int *) arg;
 392                 if (decoder->enable != v) {
 393                         decoder->enable = v;
 394                         saa7110_write(client, 0x0E, v ? 0x18 : 0x80);
 395                         dprintk(1, KERN_INFO "%s: YUV %s\n", I2C_NAME(client),
 396                                 v ? "on" : "off");
 397                 }
 398                 break;
 399
 400         case DECODER_SET_PICTURE:
 401         {
 402                 struct video_picture *pic = arg;
 403
 404                 if (decoder->bright != pic->brightness) {
 405                         /* We want 0 to 255 we get 0-65535 */
 406                         decoder->bright = pic->brightness;
 407                         saa7110_write(client, 0x19, decoder->bright >> 8);
 408                 }
 409                 if (decoder->contrast != pic->contrast) {
 410                         /* We want 0 to 127 we get 0-65535 */
 411                         decoder->contrast = pic->contrast;
 412                         saa7110_write(client, 0x13,
 413                                       decoder->contrast >> 9);
 414                 }
 415                 if (decoder->sat != pic->colour) {
 416                         /* We want 0 to 127 we get 0-65535 */
 417                         decoder->sat = pic->colour;
 418                         saa7110_write(client, 0x12, decoder->sat >> 9);
 419                 }
 420                 if (decoder->hue != pic->hue) {
 421                         /* We want -128 to 127 we get 0-65535 */
 422                         decoder->hue = pic->hue;
 423                         saa7110_write(client, 0x07,
 424                                       (decoder->hue >> 8) - 128);
 425                 }
 426         }
 427                 break;
 428
 429         case DECODER_DUMP:
 430                 for (v = 0; v < 0x34; v += 16) {
 431                         int j;
 432                         dprintk(1, KERN_INFO "%s: %03x\n", I2C_NAME(client),
 433                                 v);
 434                         for (j = 0; j < 16; j++) {
 435                                 dprintk(1, KERN_INFO " %02x",
 436                                         decoder->reg[v + j]);
 437                         }
 438                         dprintk(1, KERN_INFO "\n");
 439                 }
 440                 break;
 441
 442         default:
 443                 dprintk(1, KERN_INFO "unknown saa7110_command??(%d)\n",
 444                         cmd);
 445                 return -EINVAL;
 446         }
 447         return 0;
 448 }
 449
 450 /* ----------------------------------------------------------------------- */
 451
 452 /*
 453  * Generic i2c probe
 454  * concerning the addresses: i2c wants 7 bit (without the r/w bit), so '>>1'
 455  */
 456 static unsigned short normal_i2c[] = {
 457         I2C_SAA7110 >> 1,
 458         (I2C_SAA7110 >> 1) + 1,
 459         I2C_CLIENT_END
 460 };
 461 static unsigned short normal_i2c_range[] = { I2C_CLIENT_END };
 462
 463 static unsigned short probe[2] = { I2C_CLIENT_END, I2C_CLIENT_END };
 464 static unsigned short probe_range[2] = { I2C_CLIENT_END, I2C_CLIENT_END };
 465 static unsigned short ignore[2] = { I2C_CLIENT_END, I2C_CLIENT_END };
 466 static unsigned short ignore_range[2] = { I2C_CLIENT_END, I2C_CLIENT_END };
 467 static unsigned short force[2] = { I2C_CLIENT_END , I2C_CLIENT_END };
 468
 469 static struct i2c_client_address_data addr_data = {
 470         .normal_i2c             = normal_i2c,
 471         .normal_i2c_range       = normal_i2c_range,
 472         .probe                  = probe,
 473         .probe_range            = probe_range,
 474         .ignore                 = ignore,
 475         .ignore_range           = ignore_range,
 476         .force                  = force
 477 };
 478
 479 static int saa7110_i2c_id = 0;
 480 static struct i2c_driver i2c_driver_saa7110;
 481
 482 static int
 483 saa7110_detect_client (struct i2c_adapter *adapter,
 484                        int                 address,
 485                        int                 kind)
 486 {
 487         struct i2c_client *client;
 488         struct saa7110 *decoder;
 489         int rv;
 490
 491         dprintk(1,
 492                 KERN_INFO
 493                 "saa7110.c: detecting saa7110 client on address 0x%x\n",
 494                 address << 1);
 495
 496         /* Check if the adapter supports the needed features */
 497         if (!i2c_check_functionality
 498             (adapter,
 499              I2C_FUNC_SMBUS_READ_BYTE | I2C_FUNC_SMBUS_WRITE_BYTE_DATA))
 500                 return 0;
 501
 502         client = kmalloc(sizeof(struct i2c_client), GFP_KERNEL);
 503         if (client == 0)
 504                 return -ENOMEM;
 505         memset(client, 0, sizeof(struct i2c_client));
 506         client->addr = address;
 507         client->adapter = adapter;
 508         client->driver = &i2c_driver_saa7110;
 509         client->flags = I2C_CLIENT_ALLOW_USE;
 510         client->id = saa7110_i2c_id++;
 511         snprintf(I2C_NAME(client), sizeof(I2C_NAME(client)) - 1,
 512                 "saa7110[%d]", client->id);
 513
 514         decoder = kmalloc(sizeof(struct saa7110), GFP_KERNEL);
 515         if (decoder == 0) {
 516                 kfree(client);
 517                 return -ENOMEM;
 518         }
 519         memset(decoder, 0, sizeof(struct saa7110));
 520         decoder->norm = VIDEO_MODE_PAL;
 521         decoder->input = 0;
 522         decoder->enable = 1;
 523         decoder->bright = 32768;
 524         decoder->contrast = 32768;
 525         decoder->hue = 32768;
 526         decoder->sat = 32768;
 527         init_waitqueue_head(&decoder->wq);
 528         i2c_set_clientdata(client, decoder);
 529
 530         rv = i2c_attach_client(client);
 531         if (rv) {
 532                 kfree(client);
 533                 kfree(decoder);
 534                 return rv;
 535         }
 536
 537         rv = saa7110_write_block(client, initseq, sizeof(initseq));
 538         if (rv < 0)
 539                 dprintk(1, KERN_ERR "%s_attach: init status %d\n",
 540                         I2C_NAME(client), rv);
 541         else {
 542                 int ver, status;
 543                 saa7110_write(client, 0x21, 0x10);
 544                 saa7110_write(client, 0x0e, 0x18);
 545                 saa7110_write(client, 0x0D, 0x04);
 546                 ver = saa7110_read(client);
 547                 saa7110_write(client, 0x0D, 0x06);
 548                 //mdelay(150);
 549                 status = saa7110_read(client);
 550                 dprintk(1,
 551                         KERN_INFO
 552                         "%s_attach: SAA7110A version %x at 0x%02x, status=0x%02x\n",
 553                         I2C_NAME(client), ver, client->addr << 1, status);
 554                 saa7110_write(client, 0x0D, 0x86);
 555                 saa7110_write(client, 0x0F, 0x10);
 556                 saa7110_write(client, 0x11, 0x59);
 557                 //saa7110_write(client, 0x2E, 0x9A);
 558         }
 559
 560         //saa7110_selmux(client,0);
 561         //determine_norm(client);
 562         /* setup and implicit mode 0 select has been performed */
 563
 564         return 0;
 565 }
 566
 567 static int
 568 saa7110_attach_adapter (struct i2c_adapter *adapter)
 569 {
 570         dprintk(1,
 571                 KERN_INFO
 572                 "saa7110.c: starting probe for adapter %s (0x%x)\n",
 573                 I2C_NAME(adapter), adapter->id);
 574         return i2c_probe(adapter, &addr_data, &saa7110_detect_client);
 575 }
 576
 577 static int
 578 saa7110_detach_client (struct i2c_client *client)
 579 {
 580         struct saa7110 *decoder = i2c_get_clientdata(client);
 581         int err;
 582
 583         err = i2c_detach_client(client);
 584         if (err) {
 585                 return err;
 586         }
 587
 588         kfree(decoder);
 589         kfree(client);
 590
 591         return 0;
 592 }
 593
 594 /* ----------------------------------------------------------------------- */
 595
 596 static struct i2c_driver i2c_driver_saa7110 = {
 597         .owner = THIS_MODULE,
 598         .name = "saa7110",
 599
 600         .id = I2C_DRIVERID_SAA7110,
 601         .flags = I2C_DF_NOTIFY,
 602
 603         .attach_adapter = saa7110_attach_adapter,
 604         .detach_client = saa7110_detach_client,
 605         .command = saa7110_command,
 606 };
 607
 608 static int __init
 609 saa7110_init (void)
 610 {
 611         return i2c_add_driver(&i2c_driver_saa7110);
 612 }
 613
 614 static void __exit
 615 saa7110_exit (void)
 616 {
 617         i2c_del_driver(&i2c_driver_saa7110);
 618 }
 619
 620 module_init(saa7110_init);
 621 module_exit(saa7110_exit);