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_param(debug, int, 0);
  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 #define SAA7110_NR_REG          0x35
  64
  65 struct saa7110 {
  66         u8 reg[SAA7110_NR_REG];
  67
  68         int norm;
  69         int input;
  70         int enable;
  71         int bright;
  72         int contrast;
  73         int hue;
  74         int sat;
  75
  76         wait_queue_head_t wq;
  77 };
  78
  79 /* ----------------------------------------------------------------------- */
  80 /* I2C support functions                                                   */
  81 /* ----------------------------------------------------------------------- */
  82
  83 static int
  84 saa7110_write (struct i2c_client *client,
  85                u8                 reg,
  86                u8                 value)
  87 {
  88         struct saa7110 *decoder = i2c_get_clientdata(client);
  89
  90         decoder->reg[reg] = value;
  91         return i2c_smbus_write_byte_data(client, reg, value);
  92 }
  93
  94 static int
  95 saa7110_write_block (struct i2c_client *client,
  96                      const u8          *data,
  97                      unsigned int       len)
  98 {
  99         int ret = -1;
 100         u8 reg = *data;         /* first register to write to */
 101
 102         /* Sanity check */
 103         if (reg + (len - 1) > SAA7110_NR_REG)
 104                 return ret;
 105
 106         /* the saa7110 has an autoincrement function, use it if
 107          * the adapter understands raw I2C */
 108         if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
 109                 struct saa7110 *decoder = i2c_get_clientdata(client);
 110                 struct i2c_msg msg;
 111
 112                 msg.len = len;
 113                 msg.buf = (char *) data;
 114                 msg.addr = client->addr;
 115                 msg.flags = 0;
 116                 ret = i2c_transfer(client->adapter, &msg, 1);
 117
 118                 /* Cache the written data */
 119                 memcpy(decoder->reg + reg, data + 1, len - 1);
 120         } else {
 121                 for (++data, --len; len; len--) {
 122                         if ((ret = saa7110_write(client, reg++,
 123                                                  *data++)) < 0)
 124                                 break;
 125                 }
 126         }
 127
 128         return ret;
 129 }
 130
 131 static inline int
 132 saa7110_read (struct i2c_client *client)
 133 {
 134         return i2c_smbus_read_byte(client);
 135 }
 136
 137 /* ----------------------------------------------------------------------- */
 138 /* SAA7110 functions                                                       */
 139 /* ----------------------------------------------------------------------- */
 140
 141 #define FRESP_06H_COMPST 0x03   //0x13
 142 #define FRESP_06H_SVIDEO 0x83   //0xC0
 143
 144
 145 static int
 146 saa7110_selmux (struct i2c_client *client,
 147                 int                chan)
 148 {
 149         static const unsigned char modes[9][8] = {
 150                 /* mode 0 */
 151                 {FRESP_06H_COMPST, 0xD9, 0x17, 0x40, 0x03,
 152                               0x44, 0x75, 0x16},
 153                 /* mode 1 */
 154                 {FRESP_06H_COMPST, 0xD8, 0x17, 0x40, 0x03,
 155                               0x44, 0x75, 0x16},
 156                 /* mode 2 */
 157                 {FRESP_06H_COMPST, 0xBA, 0x07, 0x91, 0x03,
 158                               0x60, 0xB5, 0x05},
 159                 /* mode 3 */
 160                 {FRESP_06H_COMPST, 0xB8, 0x07, 0x91, 0x03,
 161                               0x60, 0xB5, 0x05},
 162                 /* mode 4 */
 163                 {FRESP_06H_COMPST, 0x7C, 0x07, 0xD2, 0x83,
 164                               0x60, 0xB5, 0x03},
 165                 /* mode 5 */
 166                 {FRESP_06H_COMPST, 0x78, 0x07, 0xD2, 0x83,
 167                               0x60, 0xB5, 0x03},
 168                 /* mode 6 */
 169                 {FRESP_06H_SVIDEO, 0x59, 0x17, 0x42, 0xA3,
 170                               0x44, 0x75, 0x12},
 171                 /* mode 7 */
 172                 {FRESP_06H_SVIDEO, 0x9A, 0x17, 0xB1, 0x13,
 173                               0x60, 0xB5, 0x14},
 174                 /* mode 8 */
 175                 {FRESP_06H_SVIDEO, 0x3C, 0x27, 0xC1, 0x23,
 176                               0x44, 0x75, 0x21}
 177         };
 178         struct saa7110 *decoder = i2c_get_clientdata(client);
 179         const unsigned char *ptr = modes[chan];
 180
 181         saa7110_write(client, 0x06, ptr[0]);    /* Luminance control    */
 182         saa7110_write(client, 0x20, ptr[1]);    /* Analog Control #1    */
 183         saa7110_write(client, 0x21, ptr[2]);    /* Analog Control #2    */
 184         saa7110_write(client, 0x22, ptr[3]);    /* Mixer Control #1     */
 185         saa7110_write(client, 0x2C, ptr[4]);    /* Mixer Control #2     */
 186         saa7110_write(client, 0x30, ptr[5]);    /* ADCs gain control    */
 187         saa7110_write(client, 0x31, ptr[6]);    /* Mixer Control #3     */
 188         saa7110_write(client, 0x21, ptr[7]);    /* Analog Control #2    */
 189         decoder->input = chan;
 190
 191         return 0;
 192 }
 193
 194 static const unsigned char initseq[1 + SAA7110_NR_REG] = {
 195         0, 0x4C, 0x3C, 0x0D, 0xEF, 0xBD, 0xF2, 0x03, 0x00,
 196         /* 0x08 */ 0xF8, 0xF8, 0x60, 0x60, 0x00, 0x86, 0x18, 0x90,
 197         /* 0x10 */ 0x00, 0x59, 0x40, 0x46, 0x42, 0x1A, 0xFF, 0xDA,
 198         /* 0x18 */ 0xF2, 0x8B, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 199         /* 0x20 */ 0xD9, 0x16, 0x40, 0x41, 0x80, 0x41, 0x80, 0x4F,
 200         /* 0x28 */ 0xFE, 0x01, 0xCF, 0x0F, 0x03, 0x01, 0x03, 0x0C,
 201         /* 0x30 */ 0x44, 0x71, 0x02, 0x8C, 0x02
 202 };
 203
 204 static int
 205 determine_norm (struct i2c_client *client)
 206 {
 207         struct saa7110 *decoder = i2c_get_clientdata(client);
 208         int status;
 209
 210         /* mode changed, start automatic detection */
 211         saa7110_write_block(client, initseq, sizeof(initseq));
 212         saa7110_selmux(client, decoder->input);
 213         sleep_on_timeout(&decoder->wq, HZ / 4);
 214         status = saa7110_read(client);
 215         if (status & 0x40) {
 216                 dprintk(1, KERN_INFO "%s: status=0x%02x (no signal)\n",
 217                         I2C_NAME(client), status);
 218                 return decoder->norm;   // no change
 219         }
 220         if ((status & 3) == 0) {
 221                 saa7110_write(client, 0x06, 0x83);
 222                 if (status & 0x20) {
 223                         dprintk(1,
 224                                 KERN_INFO
 225                                 "%s: status=0x%02x (NTSC/no color)\n",
 226                                 I2C_NAME(client), status);
 227                         //saa7110_write(client,0x2E,0x81);
 228                         return VIDEO_MODE_NTSC;
 229                 }
 230                 dprintk(1, KERN_INFO "%s: status=0x%02x (PAL/no color)\n",
 231                         I2C_NAME(client), status);
 232                 //saa7110_write(client,0x2E,0x9A);
 233                 return VIDEO_MODE_PAL;
 234         }
 235         //saa7110_write(client,0x06,0x03);
 236         if (status & 0x20) {    /* 60Hz */
 237                 dprintk(1, KERN_INFO "%s: status=0x%02x (NTSC)\n",
 238                         I2C_NAME(client), status);
 239                 saa7110_write(client, 0x0D, 0x86);
 240                 saa7110_write(client, 0x0F, 0x50);
 241                 saa7110_write(client, 0x11, 0x2C);
 242                 //saa7110_write(client,0x2E,0x81);
 243                 return VIDEO_MODE_NTSC;
 244         }
 245
 246         /* 50Hz -> PAL/SECAM */
 247         saa7110_write(client, 0x0D, 0x86);
 248         saa7110_write(client, 0x0F, 0x10);
 249         saa7110_write(client, 0x11, 0x59);
 250         //saa7110_write(client,0x2E,0x9A);
 251
 252         sleep_on_timeout(&decoder->wq, HZ / 4);
 253
 254         status = saa7110_read(client);
 255         if ((status & 0x03) == 0x01) {
 256                 dprintk(1, KERN_INFO "%s: status=0x%02x (SECAM)\n",
 257                         I2C_NAME(client), status);
 258                 saa7110_write(client, 0x0D, 0x87);
 259                 return VIDEO_MODE_SECAM;
 260         }
 261         dprintk(1, KERN_INFO "%s: status=0x%02x (PAL)\n", I2C_NAME(client),
 262                 status);
 263         return VIDEO_MODE_PAL;
 264 }
 265
 266 static int
 267 saa7110_command (struct i2c_client *client,
 268                  unsigned int       cmd,
 269                  void              *arg)
 270 {
 271         struct saa7110 *decoder = i2c_get_clientdata(client);
 272         int v;
 273
 274         switch (cmd) {
 275         case 0:
 276                 //saa7110_write_block(client, initseq, sizeof(initseq));
 277                 break;
 278
 279         case DECODER_GET_CAPABILITIES:
 280         {
 281                 struct video_decoder_capability *dc = arg;
 282
 283                 dc->flags =
 284                     VIDEO_DECODER_PAL | VIDEO_DECODER_NTSC |
 285                     VIDEO_DECODER_SECAM | VIDEO_DECODER_AUTO;
 286                 dc->inputs = SAA7110_MAX_INPUT;
 287                 dc->outputs = SAA7110_MAX_OUTPUT;
 288         }
 289                 break;
 290
 291         case DECODER_GET_STATUS:
 292         {
 293                 int status;
 294                 int res = 0;
 295
 296                 status = saa7110_read(client);
 297                 dprintk(1, KERN_INFO "%s: status=0x%02x norm=%d\n",
 298                         I2C_NAME(client), status, decoder->norm);
 299                 if (!(status & 0x40))
 300                         res |= DECODER_STATUS_GOOD;
 301                 if (status & 0x03)
 302                         res |= DECODER_STATUS_COLOR;
 303
 304                 switch (decoder->norm) {
 305                 case VIDEO_MODE_NTSC:
 306                         res |= DECODER_STATUS_NTSC;
 307                         break;
 308                 case VIDEO_MODE_PAL:
 309                         res |= DECODER_STATUS_PAL;
 310                         break;
 311                 case VIDEO_MODE_SECAM:
 312                         res |= DECODER_STATUS_SECAM;
 313                         break;
 314                 }
 315                 *(int *) arg = res;
 316         }
 317                 break;
 318
 319         case DECODER_SET_NORM:
 320                 v = *(int *) arg;
 321                 if (decoder->norm != v) {
 322                         decoder->norm = v;
 323                         //saa7110_write(client, 0x06, 0x03);
 324                         switch (v) {
 325                         case VIDEO_MODE_NTSC:
 326                                 saa7110_write(client, 0x0D, 0x86);
 327                                 saa7110_write(client, 0x0F, 0x50);
 328                                 saa7110_write(client, 0x11, 0x2C);
 329                                 //saa7110_write(client, 0x2E, 0x81);
 330                                 dprintk(1,
 331                                         KERN_INFO "%s: switched to NTSC\n",
 332                                         I2C_NAME(client));
 333                                 break;
 334                         case VIDEO_MODE_PAL:
 335                                 saa7110_write(client, 0x0D, 0x86);
 336                                 saa7110_write(client, 0x0F, 0x10);
 337                                 saa7110_write(client, 0x11, 0x59);
 338                                 //saa7110_write(client, 0x2E, 0x9A);
 339                                 dprintk(1,
 340                                         KERN_INFO "%s: switched to PAL\n",
 341                                         I2C_NAME(client));
 342                                 break;
 343                         case VIDEO_MODE_SECAM:
 344                                 saa7110_write(client, 0x0D, 0x87);
 345                                 saa7110_write(client, 0x0F, 0x10);
 346                                 saa7110_write(client, 0x11, 0x59);
 347                                 //saa7110_write(client, 0x2E, 0x9A);
 348                                 dprintk(1,
 349                                         KERN_INFO
 350                                         "%s: switched to SECAM\n",
 351                                         I2C_NAME(client));
 352                                 break;
 353                         case VIDEO_MODE_AUTO:
 354                                 dprintk(1,
 355                                         KERN_INFO
 356                                         "%s: TV standard detection...\n",
 357                                         I2C_NAME(client));
 358                                 decoder->norm = determine_norm(client);
 359                                 *(int *) arg = decoder->norm;
 360                                 break;
 361                         default:
 362                                 return -EPERM;
 363                         }
 364                 }
 365                 break;
 366
 367         case DECODER_SET_INPUT:
 368                 v = *(int *) arg;
 369                 if (v < 0 || v > SAA7110_MAX_INPUT) {
 370                         dprintk(1,
 371                                 KERN_INFO "%s: input=%d not available\n",
 372                                 I2C_NAME(client), v);
 373                         return -EINVAL;
 374                 }
 375                 if (decoder->input != v) {
 376                         saa7110_selmux(client, v);
 377                         dprintk(1, KERN_INFO "%s: switched to input=%d\n",
 378                                 I2C_NAME(client), v);
 379                 }
 380                 break;
 381
 382         case DECODER_SET_OUTPUT:
 383                 v = *(int *) arg;
 384                 /* not much choice of outputs */
 385                 if (v != 0)
 386                         return -EINVAL;
 387                 break;
 388
 389         case DECODER_ENABLE_OUTPUT:
 390                 v = *(int *) arg;
 391                 if (decoder->enable != v) {
 392                         decoder->enable = v;
 393                         saa7110_write(client, 0x0E, v ? 0x18 : 0x80);
 394                         dprintk(1, KERN_INFO "%s: YUV %s\n", I2C_NAME(client),
 395                                 v ? "on" : "off");
 396                 }
 397                 break;
 398
 399         case DECODER_SET_PICTURE:
 400         {
 401                 struct video_picture *pic = arg;
 402
 403                 if (decoder->bright != pic->brightness) {
 404                         /* We want 0 to 255 we get 0-65535 */
 405                         decoder->bright = pic->brightness;
 406                         saa7110_write(client, 0x19, decoder->bright >> 8);
 407                 }
 408                 if (decoder->contrast != pic->contrast) {
 409                         /* We want 0 to 127 we get 0-65535 */
 410                         decoder->contrast = pic->contrast;
 411                         saa7110_write(client, 0x13,
 412                                       decoder->contrast >> 9);
 413                 }
 414                 if (decoder->sat != pic->colour) {
 415                         /* We want 0 to 127 we get 0-65535 */
 416                         decoder->sat = pic->colour;
 417                         saa7110_write(client, 0x12, decoder->sat >> 9);
 418                 }
 419                 if (decoder->hue != pic->hue) {
 420                         /* We want -128 to 127 we get 0-65535 */
 421                         decoder->hue = pic->hue;
 422                         saa7110_write(client, 0x07,
 423                                       (decoder->hue >> 8) - 128);
 424                 }
 425         }
 426                 break;
 427
 428         case DECODER_DUMP:
 429                 for (v = 0; v < 0x34; v += 16) {
 430                         int j;
 431                         dprintk(1, KERN_INFO "%s: %03x\n", I2C_NAME(client),
 432                                 v);
 433                         for (j = 0; j < 16; j++) {
 434                                 dprintk(1, KERN_INFO " %02x",
 435                                         decoder->reg[v + j]);
 436                         }
 437                         dprintk(1, KERN_INFO "\n");
 438                 }
 439                 break;
 440
 441         default:
 442                 dprintk(1, KERN_INFO "unknown saa7110_command??(%d)\n",
 443                         cmd);
 444                 return -EINVAL;
 445         }
 446         return 0;
 447 }
 448
 449 /* ----------------------------------------------------------------------- */
 450
 451 /*
 452  * Generic i2c probe
 453  * concerning the addresses: i2c wants 7 bit (without the r/w bit), so '>>1'
 454  */
 455 static unsigned short normal_i2c[] = {
 456         I2C_SAA7110 >> 1,
 457         (I2C_SAA7110 >> 1) + 1,
 458         I2C_CLIENT_END
 459 };
 460 static unsigned short normal_i2c_range[] = { I2C_CLIENT_END };
 461
 462 static unsigned short probe[2] = { I2C_CLIENT_END, I2C_CLIENT_END };
 463 static unsigned short probe_range[2] = { I2C_CLIENT_END, I2C_CLIENT_END };
 464 static unsigned short ignore[2] = { I2C_CLIENT_END, I2C_CLIENT_END };
 465 static unsigned short ignore_range[2] = { I2C_CLIENT_END, I2C_CLIENT_END };
 466 static unsigned short force[2] = { I2C_CLIENT_END , I2C_CLIENT_END };
 467
 468 static struct i2c_client_address_data addr_data = {
 469         .normal_i2c             = normal_i2c,
 470         .normal_i2c_range       = normal_i2c_range,
 471         .probe                  = probe,
 472         .probe_range            = probe_range,
 473         .ignore                 = ignore,
 474         .ignore_range           = ignore_range,
 475         .force                  = force
 476 };
 477
 478 static int saa7110_i2c_id = 0;
 479 static struct i2c_driver i2c_driver_saa7110;
 480
 481 static int
 482 saa7110_detect_client (struct i2c_adapter *adapter,
 483                        int                 address,
 484                        int                 kind)
 485 {
 486         struct i2c_client *client;
 487         struct saa7110 *decoder;
 488         int rv;
 489
 490         dprintk(1,
 491                 KERN_INFO
 492                 "saa7110.c: detecting saa7110 client on address 0x%x\n",
 493                 address << 1);
 494
 495         /* Check if the adapter supports the needed features */
 496         if (!i2c_check_functionality
 497             (adapter,
 498              I2C_FUNC_SMBUS_READ_BYTE | I2C_FUNC_SMBUS_WRITE_BYTE_DATA))
 499                 return 0;
 500
 501         client = kmalloc(sizeof(struct i2c_client), GFP_KERNEL);
 502         if (client == 0)
 503                 return -ENOMEM;
 504         memset(client, 0, sizeof(struct i2c_client));
 505         client->addr = address;
 506         client->adapter = adapter;
 507         client->driver = &i2c_driver_saa7110;
 508         client->flags = I2C_CLIENT_ALLOW_USE;
 509         client->id = saa7110_i2c_id++;
 510         snprintf(I2C_NAME(client), sizeof(I2C_NAME(client)) - 1,
 511                 "saa7110[%d]", client->id);
 512
 513         decoder = kmalloc(sizeof(struct saa7110), GFP_KERNEL);
 514         if (decoder == 0) {
 515                 kfree(client);
 516                 return -ENOMEM;
 517         }
 518         memset(decoder, 0, sizeof(struct saa7110));
 519         decoder->norm = VIDEO_MODE_PAL;
 520         decoder->input = 0;
 521         decoder->enable = 1;
 522         decoder->bright = 32768;
 523         decoder->contrast = 32768;
 524         decoder->hue = 32768;
 525         decoder->sat = 32768;
 526         init_waitqueue_head(&decoder->wq);
 527         i2c_set_clientdata(client, decoder);
 528
 529         rv = i2c_attach_client(client);
 530         if (rv) {
 531                 kfree(client);
 532                 kfree(decoder);
 533                 return rv;
 534         }
 535
 536         rv = saa7110_write_block(client, initseq, sizeof(initseq));
 537         if (rv < 0)
 538                 dprintk(1, KERN_ERR "%s_attach: init status %d\n",
 539                         I2C_NAME(client), rv);
 540         else {
 541                 int ver, status;
 542                 saa7110_write(client, 0x21, 0x10);
 543                 saa7110_write(client, 0x0e, 0x18);
 544                 saa7110_write(client, 0x0D, 0x04);
 545                 ver = saa7110_read(client);
 546                 saa7110_write(client, 0x0D, 0x06);
 547                 //mdelay(150);
 548                 status = saa7110_read(client);
 549                 dprintk(1,
 550                         KERN_INFO
 551                         "%s_attach: SAA7110A version %x at 0x%02x, status=0x%02x\n",
 552                         I2C_NAME(client), ver, client->addr << 1, status);
 553                 saa7110_write(client, 0x0D, 0x86);
 554                 saa7110_write(client, 0x0F, 0x10);
 555                 saa7110_write(client, 0x11, 0x59);
 556                 //saa7110_write(client, 0x2E, 0x9A);
 557         }
 558
 559         //saa7110_selmux(client,0);
 560         //determine_norm(client);
 561         /* setup and implicit mode 0 select has been performed */
 562
 563         return 0;
 564 }
 565
 566 static int
 567 saa7110_attach_adapter (struct i2c_adapter *adapter)
 568 {
 569         dprintk(1,
 570                 KERN_INFO
 571                 "saa7110.c: starting probe for adapter %s (0x%x)\n",
 572                 I2C_NAME(adapter), adapter->id);
 573         return i2c_probe(adapter, &addr_data, &saa7110_detect_client);
 574 }
 575
 576 static int
 577 saa7110_detach_client (struct i2c_client *client)
 578 {
 579         struct saa7110 *decoder = i2c_get_clientdata(client);
 580         int err;
 581
 582         err = i2c_detach_client(client);
 583         if (err) {
 584                 return err;
 585         }
 586
 587         kfree(decoder);
 588         kfree(client);
 589
 590         return 0;
 591 }
 592
 593 /* ----------------------------------------------------------------------- */
 594
 595 static struct i2c_driver i2c_driver_saa7110 = {
 596         .owner = THIS_MODULE,
 597         .name = "saa7110",
 598
 599         .id = I2C_DRIVERID_SAA7110,
 600         .flags = I2C_DF_NOTIFY,
 601
 602         .attach_adapter = saa7110_attach_adapter,
 603         .detach_client = saa7110_detach_client,
 604         .command = saa7110_command,
 605 };
 606
 607 static int __init
 608 saa7110_init (void)
 609 {
 610         return i2c_add_driver(&i2c_driver_saa7110);
 611 }
 612
 613 static void __exit
 614 saa7110_exit (void)
 615 {
 616         i2c_del_driver(&i2c_driver_saa7110);
 617 }
 618
 619 module_init(saa7110_init);
 620 module_exit(saa7110_exit);