drivers/media/video/vpx3220.c

   1 /*
   2  * vpx3220a, vpx3216b & vpx3214c video decoder driver version 0.0.1
   3  *
   4  * Copyright (C) 2001 Laurent Pinchart <lpinchart@freegates.be>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  19  */
  20
  21 #include <linux/module.h>
  22 #include <linux/init.h>
  23 #include <linux/delay.h>
  24 #include <linux/types.h>
  25 #include <linux/slab.h>
  26
  27 #include <linux/byteorder/swab.h>
  28
  29 #include <asm/io.h>
  30 #include <asm/uaccess.h>
  31
  32 #include <linux/i2c.h>
  33
  34 #define I2C_NAME(x) (x)->name
  35
  36 #include <linux/videodev.h>
  37 #include <media/v4l2-common.h>
  38 #include <linux/video_decoder.h>
  39
  40 #define I2C_VPX3220        0x86
  41 #define VPX3220_DEBUG   KERN_DEBUG "vpx3220: "
  42
  43 static int debug;
  44 module_param(debug, int, 0);
  45 MODULE_PARM_DESC(debug, "Debug level (0-1)");
  46
  47 #define dprintk(num, format, args...) \
  48         do { \
  49                 if (debug >= num) \
  50                         printk(format, ##args); \
  51         } while (0)
  52
  53 #define VPX_TIMEOUT_COUNT  10
  54
  55 /* ----------------------------------------------------------------------- */
  56
  57 struct vpx3220 {
  58         unsigned char reg[255];
  59
  60         int norm;
  61         int input;
  62         int enable;
  63         int bright;
  64         int contrast;
  65         int hue;
  66         int sat;
  67 };
  68
  69 static char *inputs[] = { "internal", "composite", "svideo" };
  70
  71 /* ----------------------------------------------------------------------- */
  72 static inline int
  73 vpx3220_write (struct i2c_client *client,
  74                u8                 reg,
  75                u8                 value)
  76 {
  77         struct vpx3220 *decoder = i2c_get_clientdata(client);
  78
  79         decoder->reg[reg] = value;
  80         return i2c_smbus_write_byte_data(client, reg, value);
  81 }
  82
  83 static inline int
  84 vpx3220_read (struct i2c_client *client,
  85               u8                 reg)
  86 {
  87         return i2c_smbus_read_byte_data(client, reg);
  88 }
  89
  90 static int
  91 vpx3220_fp_status (struct i2c_client *client)
  92 {
  93         unsigned char status;
  94         unsigned int i;
  95
  96         for (i = 0; i < VPX_TIMEOUT_COUNT; i++) {
  97                 status = vpx3220_read(client, 0x29);
  98
  99                 if (!(status & 4))
 100                         return 0;
 101
 102                 udelay(10);
 103
 104                 if (need_resched())
 105                         cond_resched();
 106         }
 107
 108         return -1;
 109 }
 110
 111 static int
 112 vpx3220_fp_write (struct i2c_client *client,
 113                   u8                 fpaddr,
 114                   u16                data)
 115 {
 116         /* Write the 16-bit address to the FPWR register */
 117         if (i2c_smbus_write_word_data(client, 0x27, swab16(fpaddr)) == -1) {
 118                 dprintk(1, VPX3220_DEBUG "%s: failed\n", __func__);
 119                 return -1;
 120         }
 121
 122         if (vpx3220_fp_status(client) < 0)
 123                 return -1;
 124
 125         /* Write the 16-bit data to the FPDAT register */
 126         if (i2c_smbus_write_word_data(client, 0x28, swab16(data)) == -1) {
 127                 dprintk(1, VPX3220_DEBUG "%s: failed\n", __func__);
 128                 return -1;
 129         }
 130
 131         return 0;
 132 }
 133
 134 static u16
 135 vpx3220_fp_read (struct i2c_client *client,
 136                  u16                fpaddr)
 137 {
 138         s16 data;
 139
 140         /* Write the 16-bit address to the FPRD register */
 141         if (i2c_smbus_write_word_data(client, 0x26, swab16(fpaddr)) == -1) {
 142                 dprintk(1, VPX3220_DEBUG "%s: failed\n", __func__);
 143                 return -1;
 144         }
 145
 146         if (vpx3220_fp_status(client) < 0)
 147                 return -1;
 148
 149         /* Read the 16-bit data from the FPDAT register */
 150         data = i2c_smbus_read_word_data(client, 0x28);
 151         if (data == -1) {
 152                 dprintk(1, VPX3220_DEBUG "%s: failed\n", __func__);
 153                 return -1;
 154         }
 155
 156         return swab16(data);
 157 }
 158
 159 static int
 160 vpx3220_write_block (struct i2c_client *client,
 161                      const u8          *data,
 162                      unsigned int       len)
 163 {
 164         u8 reg;
 165         int ret = -1;
 166
 167         while (len >= 2) {
 168                 reg = *data++;
 169                 if ((ret =
 170                      vpx3220_write(client, reg, *data++)) < 0)
 171                         break;
 172                 len -= 2;
 173         }
 174
 175         return ret;
 176 }
 177
 178 static int
 179 vpx3220_write_fp_block (struct i2c_client *client,
 180                         const u16         *data,
 181                         unsigned int       len)
 182 {
 183         u8 reg;
 184         int ret = 0;
 185
 186         while (len > 1) {
 187                 reg = *data++;
 188                 ret |= vpx3220_fp_write(client, reg, *data++);
 189                 len -= 2;
 190         }
 191
 192         return ret;
 193 }
 194
 195 /* ---------------------------------------------------------------------- */
 196
 197 static const unsigned short init_ntsc[] = {
 198         0x1c, 0x00,             /* NTSC tint angle */
 199         0x88, 17,               /* Window 1 vertical */
 200         0x89, 240,              /* Vertical lines in */
 201         0x8a, 240,              /* Vertical lines out */
 202         0x8b, 000,              /* Horizontal begin */
 203         0x8c, 640,              /* Horizontal length */
 204         0x8d, 640,              /* Number of pixels */
 205         0x8f, 0xc00,            /* Disable window 2 */
 206         0xf0, 0x73,             /* 13.5 MHz transport, Forced
 207                                  * mode, latch windows */
 208         0xf2, 0x13,             /* NTSC M, composite input */
 209         0xe7, 0x1e1,            /* Enable vertical standard
 210                                  * locking @ 240 lines */
 211 };
 212
 213 static const unsigned short init_pal[] = {
 214         0x88, 23,               /* Window 1 vertical begin */
 215         0x89, 288,              /* Vertical lines in (16 lines
 216                                  * skipped by the VFE) */
 217         0x8a, 288,              /* Vertical lines out (16 lines
 218                                  * skipped by the VFE) */
 219         0x8b, 16,               /* Horizontal begin */
 220         0x8c, 768,              /* Horizontal length */
 221         0x8d, 784,              /* Number of pixels
 222                                  * Must be >= Horizontal begin + Horizontal length */
 223         0x8f, 0xc00,            /* Disable window 2 */
 224         0xf0, 0x77,             /* 13.5 MHz transport, Forced
 225                                  * mode, latch windows */
 226         0xf2, 0x3d1,            /* PAL B,G,H,I, composite input */
 227         0xe7, 0x241,            /* PAL/SECAM set to 288 lines */
 228 };
 229
 230 static const unsigned short init_secam[] = {
 231         0x88, 23,               /* Window 1 vertical begin */
 232         0x89, 288,              /* Vertical lines in (16 lines
 233                                  * skipped by the VFE) */
 234         0x8a, 288,              /* Vertical lines out (16 lines
 235                                  * skipped by the VFE) */
 236         0x8b, 16,               /* Horizontal begin */
 237         0x8c, 768,              /* Horizontal length */
 238         0x8d, 784,              /* Number of pixels
 239                                  * Must be >= Horizontal begin + Horizontal length */
 240         0x8f, 0xc00,            /* Disable window 2 */
 241         0xf0, 0x77,             /* 13.5 MHz transport, Forced
 242                                  * mode, latch windows */
 243         0xf2, 0x3d5,            /* SECAM, composite input */
 244         0xe7, 0x241,            /* PAL/SECAM set to 288 lines */
 245 };
 246
 247 static const unsigned char init_common[] = {
 248         0xf2, 0x00,             /* Disable all outputs */
 249         0x33, 0x0d,             /* Luma : VIN2, Chroma : CIN
 250                                  * (clamp off) */
 251         0xd8, 0xa8,             /* HREF/VREF active high, VREF
 252                                  * pulse = 2, Odd/Even flag */
 253         0x20, 0x03,             /* IF compensation 0dB/oct */
 254         0xe0, 0xff,             /* Open up all comparators */
 255         0xe1, 0x00,
 256         0xe2, 0x7f,
 257         0xe3, 0x80,
 258         0xe4, 0x7f,
 259         0xe5, 0x80,
 260         0xe6, 0x00,             /* Brightness set to 0 */
 261         0xe7, 0xe0,             /* Contrast to 1.0, noise shaping
 262                                  * 10 to 8 2-bit error diffusion */
 263         0xe8, 0xf8,             /* YUV422, CbCr binary offset,
 264                                  * ... (p.32) */
 265         0xea, 0x18,             /* LLC2 connected, output FIFO
 266                                  * reset with VACTintern */
 267         0xf0, 0x8a,             /* Half full level to 10, bus
 268                                  * shuffler [7:0, 23:16, 15:8] */
 269         0xf1, 0x18,             /* Single clock, sync mode, no
 270                                  * FE delay, no HLEN counter */
 271         0xf8, 0x12,             /* Port A, PIXCLK, HF# & FE#
 272                                  * strength to 2 */
 273         0xf9, 0x24,             /* Port B, HREF, VREF, PREF &
 274                                  * ALPHA strength to 4 */
 275 };
 276
 277 static const unsigned short init_fp[] = {
 278         0x59, 0,
 279         0xa0, 2070,             /* ACC reference */
 280         0xa3, 0,
 281         0xa4, 0,
 282         0xa8, 30,
 283         0xb2, 768,
 284         0xbe, 27,
 285         0x58, 0,
 286         0x26, 0,
 287         0x4b, 0x298,            /* PLL gain */
 288 };
 289
 290 static void
 291 vpx3220_dump_i2c (struct i2c_client *client)
 292 {
 293         int len = sizeof(init_common);
 294         const unsigned char *data = init_common;
 295
 296         while (len > 1) {
 297                 dprintk(1,
 298                         KERN_DEBUG "vpx3216b i2c reg 0x%02x data 0x%02x\n",
 299                         *data, vpx3220_read(client, *data));
 300                 data += 2;
 301                 len -= 2;
 302         }
 303 }
 304
 305 static int
 306 vpx3220_command (struct i2c_client *client,
 307                  unsigned int       cmd,
 308                  void              *arg)
 309 {
 310         struct vpx3220 *decoder = i2c_get_clientdata(client);
 311
 312         switch (cmd) {
 313         case 0:
 314         {
 315                 vpx3220_write_block(client, init_common,
 316                                     sizeof(init_common));
 317                 vpx3220_write_fp_block(client, init_fp,
 318                                        sizeof(init_fp) >> 1);
 319                 switch (decoder->norm) {
 320
 321                 case VIDEO_MODE_NTSC:
 322                         vpx3220_write_fp_block(client, init_ntsc,
 323                                                sizeof(init_ntsc) >> 1);
 324                         break;
 325
 326                 case VIDEO_MODE_PAL:
 327                         vpx3220_write_fp_block(client, init_pal,
 328                                                sizeof(init_pal) >> 1);
 329                         break;
 330                 case VIDEO_MODE_SECAM:
 331                         vpx3220_write_fp_block(client, init_secam,
 332                                                sizeof(init_secam) >> 1);
 333                         break;
 334                 default:
 335                         vpx3220_write_fp_block(client, init_pal,
 336                                                sizeof(init_pal) >> 1);
 337                         break;
 338                 }
 339         }
 340                 break;
 341
 342         case DECODER_DUMP:
 343         {
 344                 vpx3220_dump_i2c(client);
 345         }
 346                 break;
 347
 348         case DECODER_GET_CAPABILITIES:
 349         {
 350                 struct video_decoder_capability *cap = arg;
 351
 352                 dprintk(1, KERN_DEBUG "%s: DECODER_GET_CAPABILITIES\n",
 353                         I2C_NAME(client));
 354
 355                 cap->flags = VIDEO_DECODER_PAL |
 356                              VIDEO_DECODER_NTSC |
 357                              VIDEO_DECODER_SECAM |
 358                              VIDEO_DECODER_AUTO |
 359                              VIDEO_DECODER_CCIR;
 360                 cap->inputs = 3;
 361                 cap->outputs = 1;
 362         }
 363                 break;
 364
 365         case DECODER_GET_STATUS:
 366         {
 367                 int res = 0, status;
 368
 369                 dprintk(1, KERN_INFO "%s: DECODER_GET_STATUS\n",
 370                         I2C_NAME(client));
 371
 372                 status = vpx3220_fp_read(client, 0x0f3);
 373
 374                 dprintk(1, KERN_INFO "%s: status: 0x%04x\n", I2C_NAME(client),
 375                         status);
 376
 377                 if (status < 0)
 378                         return status;
 379
 380                 if ((status & 0x20) == 0) {
 381                         res |= DECODER_STATUS_GOOD | DECODER_STATUS_COLOR;
 382
 383                         switch (status & 0x18) {
 384
 385                         case 0x00:
 386                         case 0x10:
 387                         case 0x14:
 388                         case 0x18:
 389                                 res |= DECODER_STATUS_PAL;
 390                                 break;
 391
 392                         case 0x08:
 393                                 res |= DECODER_STATUS_SECAM;
 394                                 break;
 395
 396                         case 0x04:
 397                         case 0x0c:
 398                         case 0x1c:
 399                                 res |= DECODER_STATUS_NTSC;
 400                                 break;
 401                         }
 402                 }
 403
 404                 *(int *) arg = res;
 405         }
 406                 break;
 407
 408         case DECODER_SET_NORM:
 409         {
 410                 int *iarg = arg, data;
 411                 int temp_input;
 412
 413                 /* Here we back up the input selection because it gets
 414                    overwritten when we fill the registers with the
 415                    choosen video norm */
 416                 temp_input = vpx3220_fp_read(client, 0xf2);
 417
 418                 dprintk(1, KERN_DEBUG "%s: DECODER_SET_NORM %d\n",
 419                         I2C_NAME(client), *iarg);
 420                 switch (*iarg) {
 421
 422                 case VIDEO_MODE_NTSC:
 423                         vpx3220_write_fp_block(client, init_ntsc,
 424                                                sizeof(init_ntsc) >> 1);
 425                         dprintk(1, KERN_INFO "%s: norm switched to NTSC\n",
 426                                 I2C_NAME(client));
 427                         break;
 428
 429                 case VIDEO_MODE_PAL:
 430                         vpx3220_write_fp_block(client, init_pal,
 431                                                sizeof(init_pal) >> 1);
 432                         dprintk(1, KERN_INFO "%s: norm switched to PAL\n",
 433                                 I2C_NAME(client));
 434                         break;
 435
 436                 case VIDEO_MODE_SECAM:
 437                         vpx3220_write_fp_block(client, init_secam,
 438                                                sizeof(init_secam) >> 1);
 439                         dprintk(1, KERN_INFO "%s: norm switched to SECAM\n",
 440                                 I2C_NAME(client));
 441                         break;
 442
 443                 case VIDEO_MODE_AUTO:
 444                         /* FIXME This is only preliminary support */
 445                         data = vpx3220_fp_read(client, 0xf2) & 0x20;
 446                         vpx3220_fp_write(client, 0xf2, 0x00c0 | data);
 447                         dprintk(1, KERN_INFO "%s: norm switched to Auto\n",
 448                                 I2C_NAME(client));
 449                         break;
 450
 451                 default:
 452                         return -EINVAL;
 453
 454                 }
 455                 decoder->norm = *iarg;
 456
 457                 /* And here we set the backed up video input again */
 458                 vpx3220_fp_write(client, 0xf2, temp_input | 0x0010);
 459                 udelay(10);
 460         }
 461                 break;
 462
 463         case DECODER_SET_INPUT:
 464         {
 465                 int *iarg = arg, data;
 466
 467                 /* RJ:  *iarg = 0: ST8 (PCTV) input
 468                  *iarg = 1: COMPOSITE  input
 469                  *iarg = 2: SVHS       input  */
 470
 471                 const int input[3][2] = {
 472                         {0x0c, 0},
 473                         {0x0d, 0},
 474                         {0x0e, 1}
 475                 };
 476
 477                 if (*iarg < 0 || *iarg > 2)
 478                         return -EINVAL;
 479
 480                 dprintk(1, KERN_INFO "%s: input switched to %s\n",
 481                         I2C_NAME(client), inputs[*iarg]);
 482
 483                 vpx3220_write(client, 0x33, input[*iarg][0]);
 484
 485                 data = vpx3220_fp_read(client, 0xf2) & ~(0x0020);
 486                 if (data < 0)
 487                         return data;
 488                 /* 0x0010 is required to latch the setting */
 489                 vpx3220_fp_write(client, 0xf2,
 490                                  data | (input[*iarg][1] << 5) | 0x0010);
 491
 492                 udelay(10);
 493         }
 494                 break;
 495
 496         case DECODER_SET_OUTPUT:
 497         {
 498                 int *iarg = arg;
 499
 500                 /* not much choice of outputs */
 501                 if (*iarg != 0) {
 502                         return -EINVAL;
 503                 }
 504         }
 505                 break;
 506
 507         case DECODER_ENABLE_OUTPUT:
 508         {
 509                 int *iarg = arg;
 510
 511                 dprintk(1, KERN_DEBUG "%s: DECODER_ENABLE_OUTPUT %d\n",
 512                         I2C_NAME(client), *iarg);
 513
 514                 vpx3220_write(client, 0xf2, (*iarg ? 0x1b : 0x00));
 515         }
 516                 break;
 517
 518         case DECODER_SET_PICTURE:
 519         {
 520                 struct video_picture *pic = arg;
 521
 522                 if (decoder->bright != pic->brightness) {
 523                         /* We want -128 to 128 we get 0-65535 */
 524                         decoder->bright = pic->brightness;
 525                         vpx3220_write(client, 0xe6,
 526                                       (decoder->bright - 32768) >> 8);
 527                 }
 528                 if (decoder->contrast != pic->contrast) {
 529                         /* We want 0 to 64 we get 0-65535 */
 530                         /* Bit 7 and 8 is for noise shaping */
 531                         decoder->contrast = pic->contrast;
 532                         vpx3220_write(client, 0xe7,
 533                                       (decoder->contrast >> 10) + 192);
 534                 }
 535                 if (decoder->sat != pic->colour) {
 536                         /* We want 0 to 4096 we get 0-65535 */
 537                         decoder->sat = pic->colour;
 538                         vpx3220_fp_write(client, 0xa0,
 539                                          decoder->sat >> 4);
 540                 }
 541                 if (decoder->hue != pic->hue) {
 542                         /* We want -512 to 512 we get 0-65535 */
 543                         decoder->hue = pic->hue;
 544                         vpx3220_fp_write(client, 0x1c,
 545                                          ((decoder->hue - 32768) >> 6) & 0xFFF);
 546                 }
 547         }
 548                 break;
 549
 550         default:
 551                 return -EINVAL;
 552         }
 553
 554         return 0;
 555 }
 556
 557 static int
 558 vpx3220_init_client (struct i2c_client *client)
 559 {
 560         vpx3220_write_block(client, init_common, sizeof(init_common));
 561         vpx3220_write_fp_block(client, init_fp, sizeof(init_fp) >> 1);
 562         /* Default to PAL */
 563         vpx3220_write_fp_block(client, init_pal, sizeof(init_pal) >> 1);
 564
 565         return 0;
 566 }
 567
 568 /* -----------------------------------------------------------------------
 569  * Client management code
 570  */
 571
 572 /*
 573  * Generic i2c probe
 574  * concerning the addresses: i2c wants 7 bit (without the r/w bit), so '>>1'
 575  */
 576 static unsigned short normal_i2c[] =
 577     { I2C_VPX3220 >> 1, (I2C_VPX3220 >> 1) + 4,
 578         I2C_CLIENT_END
 579 };
 580
 581 static unsigned short ignore = I2C_CLIENT_END;
 582
 583 static struct i2c_client_address_data addr_data = {
 584         .normal_i2c             = normal_i2c,
 585         .probe                  = &ignore,
 586         .ignore                 = &ignore,
 587 };
 588
 589 static struct i2c_driver vpx3220_i2c_driver;
 590
 591 static int
 592 vpx3220_detach_client (struct i2c_client *client)
 593 {
 594         struct vpx3220 *decoder = i2c_get_clientdata(client);
 595         int err;
 596
 597         err = i2c_detach_client(client);
 598         if (err) {
 599                 return err;
 600         }
 601
 602         kfree(decoder);
 603         kfree(client);
 604
 605         return 0;
 606 }
 607
 608 static int
 609 vpx3220_detect_client (struct i2c_adapter *adapter,
 610                        int                 address,
 611                        int                 kind)
 612 {
 613         int err;
 614         struct i2c_client *client;
 615         struct vpx3220 *decoder;
 616
 617         dprintk(1, VPX3220_DEBUG "%s\n", __func__);
 618
 619         /* Check if the adapter supports the needed features */
 620         if (!i2c_check_functionality
 621             (adapter, I2C_FUNC_SMBUS_BYTE_DATA | I2C_FUNC_SMBUS_WORD_DATA))
 622                 return 0;
 623
 624         client = kzalloc(sizeof(struct i2c_client), GFP_KERNEL);
 625         if (client == NULL) {
 626                 return -ENOMEM;
 627         }
 628
 629         client->addr = address;
 630         client->adapter = adapter;
 631         client->driver = &vpx3220_i2c_driver;
 632
 633         /* Check for manufacture ID and part number */
 634         if (kind < 0) {
 635                 u8 id;
 636                 u16 pn;
 637
 638                 id = vpx3220_read(client, 0x00);
 639                 if (id != 0xec) {
 640                         dprintk(1,
 641                                 KERN_INFO
 642                                 "vpx3220_attach: Wrong manufacturer ID (0x%02x)\n",
 643                                 id);
 644                         kfree(client);
 645                         return 0;
 646                 }
 647
 648                 pn = (vpx3220_read(client, 0x02) << 8) +
 649                     vpx3220_read(client, 0x01);
 650                 switch (pn) {
 651                 case 0x4680:
 652                         strlcpy(I2C_NAME(client), "vpx3220a",
 653                                 sizeof(I2C_NAME(client)));
 654                         break;
 655                 case 0x4260:
 656                         strlcpy(I2C_NAME(client), "vpx3216b",
 657                                 sizeof(I2C_NAME(client)));
 658                         break;
 659                 case 0x4280:
 660                         strlcpy(I2C_NAME(client), "vpx3214c",
 661                                 sizeof(I2C_NAME(client)));
 662                         break;
 663                 default:
 664                         dprintk(1,
 665                                 KERN_INFO
 666                                 "%s: Wrong part number (0x%04x)\n",
 667                                 __func__, pn);
 668                         kfree(client);
 669                         return 0;
 670                 }
 671         } else {
 672                 strlcpy(I2C_NAME(client), "forced vpx32xx",
 673                         sizeof(I2C_NAME(client)));
 674         }
 675
 676         decoder = kzalloc(sizeof(struct vpx3220), GFP_KERNEL);
 677         if (decoder == NULL) {
 678                 kfree(client);
 679                 return -ENOMEM;
 680         }
 681         decoder->norm = VIDEO_MODE_PAL;
 682         decoder->input = 0;
 683         decoder->enable = 1;
 684         decoder->bright = 32768;
 685         decoder->contrast = 32768;
 686         decoder->hue = 32768;
 687         decoder->sat = 32768;
 688         i2c_set_clientdata(client, decoder);
 689
 690         err = i2c_attach_client(client);
 691         if (err) {
 692                 kfree(client);
 693                 kfree(decoder);
 694                 return err;
 695         }
 696
 697         dprintk(1, KERN_INFO "%s: vpx32xx client found at address 0x%02x\n",
 698                 I2C_NAME(client), client->addr << 1);
 699
 700         vpx3220_init_client(client);
 701
 702         return 0;
 703 }
 704
 705 static int
 706 vpx3220_attach_adapter (struct i2c_adapter *adapter)
 707 {
 708         int ret;
 709
 710         ret = i2c_probe(adapter, &addr_data, &vpx3220_detect_client);
 711         dprintk(1, VPX3220_DEBUG "%s: i2c_probe returned %d\n",
 712                 __func__, ret);
 713         return ret;
 714 }
 715
 716 /* -----------------------------------------------------------------------
 717  * Driver initialization and cleanup code
 718  */
 719
 720 static struct i2c_driver vpx3220_i2c_driver = {
 721         .driver = {
 722                 .name = "vpx3220",
 723         },
 724
 725         .id = I2C_DRIVERID_VPX3220,
 726
 727         .attach_adapter = vpx3220_attach_adapter,
 728         .detach_client = vpx3220_detach_client,
 729         .command = vpx3220_command,
 730 };
 731
 732 static int __init
 733 vpx3220_init (void)
 734 {
 735         return i2c_add_driver(&vpx3220_i2c_driver);
 736 }
 737
 738 static void __exit
 739 vpx3220_cleanup (void)
 740 {
 741         i2c_del_driver(&vpx3220_i2c_driver);
 742 }
 743
 744 module_init(vpx3220_init);
 745 module_exit(vpx3220_cleanup);
 746
 747 MODULE_DESCRIPTION("vpx3220a/vpx3216b/vpx3214c video decoder driver");
 748 MODULE_AUTHOR("Laurent Pinchart");
 749 MODULE_LICENSE("GPL");