git.oblomov.eu Git - linux-2.6/blob - 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 <linux/video_decoder.h>
  38
  39 #define I2C_VPX3220        0x86
  40 #define VPX3220_DEBUG   KERN_DEBUG "vpx3220: "
  41
  42 static int debug = 0;
  43 module_param(debug, int, 0);
  44 MODULE_PARM_DESC(debug, "Debug level (0-1)");
  45
  46 #define dprintk(num, format, args...) \
  47         do { \
  48                 if (debug >= num) \
  49                         printk(format, ##args); \
  50         } while (0)
  51
  52 #define VPX_TIMEOUT_COUNT  10
  53
  54 /* ----------------------------------------------------------------------- */
  55
  56 struct vpx3220 {
  57         unsigned char reg[255];
  58
  59         int norm;
  60         int input;
  61         int enable;
  62         int bright;
  63         int contrast;
  64         int hue;
  65         int sat;
  66 };
  67
  68 static char *inputs[] = { "internal", "composite", "svideo" };
  69
  70 /* ----------------------------------------------------------------------- */
  71 static inline int
  72 vpx3220_write (struct i2c_client *client,
  73                u8                 reg,
  74                u8                 value)
  75 {
  76         struct vpx3220 *decoder = i2c_get_clientdata(client);
  77
  78         decoder->reg[reg] = value;
  79         return i2c_smbus_write_byte_data(client, reg, value);
  80 }
  81
  82 static inline int
  83 vpx3220_read (struct i2c_client *client,
  84               u8                 reg)
  85 {
  86         return i2c_smbus_read_byte_data(client, reg);
  87 }
  88
  89 static int
  90 vpx3220_fp_status (struct i2c_client *client)
  91 {
  92         unsigned char status;
  93         unsigned int i;
  94
  95         for (i = 0; i < VPX_TIMEOUT_COUNT; i++) {
  96                 status = vpx3220_read(client, 0x29);
  97
  98                 if (!(status & 4))
  99                         return 0;
 100
 101                 udelay(10);
 102
 103                 if (need_resched())
 104                         cond_resched();
 105         }
 106
 107         return -1;
 108 }
 109
 110 static int
 111 vpx3220_fp_write (struct i2c_client *client,
 112                   u8                 fpaddr,
 113                   u16                data)
 114 {
 115         /* Write the 16-bit address to the FPWR register */
 116         if (i2c_smbus_write_word_data(client, 0x27, swab16(fpaddr)) == -1) {
 117                 dprintk(1, VPX3220_DEBUG "%s: failed\n", __func__);
 118                 return -1;
 119         }
 120
 121         if (vpx3220_fp_status(client) < 0)
 122                 return -1;
 123
 124         /* Write the 16-bit data to the FPDAT register */
 125         if (i2c_smbus_write_word_data(client, 0x28, swab16(data)) == -1) {
 126                 dprintk(1, VPX3220_DEBUG "%s: failed\n", __func__);
 127                 return -1;
 128         }
 129
 130         return 0;
 131 }
 132
 133 static u16
 134 vpx3220_fp_read (struct i2c_client *client,
 135                  u16                fpaddr)
 136 {
 137         s16 data;
 138
 139         /* Write the 16-bit address to the FPRD register */
 140         if (i2c_smbus_write_word_data(client, 0x26, swab16(fpaddr)) == -1) {
 141                 dprintk(1, VPX3220_DEBUG "%s: failed\n", __func__);
 142                 return -1;
 143         }
 144
 145         if (vpx3220_fp_status(client) < 0)
 146                 return -1;
 147
 148         /* Read the 16-bit data from the FPDAT register */
 149         data = i2c_smbus_read_word_data(client, 0x28);
 150         if (data == -1) {
 151                 dprintk(1, VPX3220_DEBUG "%s: failed\n", __func__);
 152                 return -1;
 153         }
 154
 155         return swab16(data);
 156 }
 157
 158 static int
 159 vpx3220_write_block (struct i2c_client *client,
 160                      const u8          *data,
 161                      unsigned int       len)
 162 {
 163         u8 reg;
 164         int ret = -1;
 165
 166         while (len >= 2) {
 167                 reg = *data++;
 168                 if ((ret =
 169                      vpx3220_write(client, reg, *data++)) < 0)
 170                         break;
 171                 len -= 2;
 172         }
 173
 174         return ret;
 175 }
 176
 177 static int
 178 vpx3220_write_fp_block (struct i2c_client *client,
 179                         const u16         *data,
 180                         unsigned int       len)
 181 {
 182         u8 reg;
 183         int ret = 0;
 184
 185         while (len > 1) {
 186                 reg = *data++;
 187                 ret |= vpx3220_fp_write(client, reg, *data++);
 188                 len -= 2;
 189         }
 190
 191         return ret;
 192 }
 193
 194 /* ---------------------------------------------------------------------- */
 195
 196 static const unsigned short init_ntsc[] = {
 197         0x1c, 0x00,             /* NTSC tint angle */
 198         0x88, 17,               /* Window 1 vertical */
 199         0x89, 240,              /* Vertical lines in */
 200         0x8a, 240,              /* Vertical lines out */
 201         0x8b, 000,              /* Horizontal begin */
 202         0x8c, 640,              /* Horizontal length */
 203         0x8d, 640,              /* Number of pixels */
 204         0x8f, 0xc00,            /* Disable window 2 */
 205         0xf0, 0x73,             /* 13.5 MHz transport, Forced
 206                                  * mode, latch windows */
 207         0xf2, 0x13,             /* NTSC M, composite input */
 208         0xe7, 0x1e1,            /* Enable vertical standard
 209                                  * locking @ 240 lines */
 210 };
 211
 212 static const unsigned short init_pal[] = {
 213         0x88, 23,               /* Window 1 vertical begin */
 214         0x89, 288,              /* Vertical lines in (16 lines
 215                                  * skipped by the VFE) */
 216         0x8a, 288,              /* Vertical lines out (16 lines
 217                                  * skipped by the VFE) */
 218         0x8b, 16,               /* Horizontal begin */
 219         0x8c, 768,              /* Horizontal length */
 220         0x8d, 784,              /* Number of pixels
 221                                  * Must be >= Horizontal begin + Horizontal length */
 222         0x8f, 0xc00,            /* Disable window 2 */
 223         0xf0, 0x77,             /* 13.5 MHz transport, Forced
 224                                  * mode, latch windows */
 225         0xf2, 0x3d1,            /* PAL B,G,H,I, composite input */
 226         0xe7, 0x241,            /* PAL/SECAM set to 288 lines */
 227 };
 228
 229 static const unsigned short init_secam[] = {
 230         0x88, 23,               /* Window 1 vertical begin */
 231         0x89, 288,              /* Vertical lines in (16 lines
 232                                  * skipped by the VFE) */
 233         0x8a, 288,              /* Vertical lines out (16 lines
 234                                  * skipped by the VFE) */
 235         0x8b, 16,               /* Horizontal begin */
 236         0x8c, 768,              /* Horizontal length */
 237         0x8d, 784,              /* Number of pixels
 238                                  * Must be >= Horizontal begin + Horizontal length */
 239         0x8f, 0xc00,            /* Disable window 2 */
 240         0xf0, 0x77,             /* 13.5 MHz transport, Forced
 241                                  * mode, latch windows */
 242         0xf2, 0x3d5,            /* SECAM, composite input */
 243         0xe7, 0x241,            /* PAL/SECAM set to 288 lines */
 244 };
 245
 246 static const unsigned char init_common[] = {
 247         0xf2, 0x00,             /* Disable all outputs */
 248         0x33, 0x0d,             /* Luma : VIN2, Chroma : CIN
 249                                  * (clamp off) */
 250         0xd8, 0xa8,             /* HREF/VREF active high, VREF
 251                                  * pulse = 2, Odd/Even flag */
 252         0x20, 0x03,             /* IF compensation 0dB/oct */
 253         0xe0, 0xff,             /* Open up all comparators */
 254         0xe1, 0x00,
 255         0xe2, 0x7f,
 256         0xe3, 0x80,
 257         0xe4, 0x7f,
 258         0xe5, 0x80,
 259         0xe6, 0x00,             /* Brightness set to 0 */
 260         0xe7, 0xe0,             /* Contrast to 1.0, noise shaping
 261                                  * 10 to 8 2-bit error diffusion */
 262         0xe8, 0xf8,             /* YUV422, CbCr binary offset,
 263                                  * ... (p.32) */
 264         0xea, 0x18,             /* LLC2 connected, output FIFO
 265                                  * reset with VACTintern */
 266         0xf0, 0x8a,             /* Half full level to 10, bus
 267                                  * shuffler [7:0, 23:16, 15:8] */
 268         0xf1, 0x18,             /* Single clock, sync mode, no
 269                                  * FE delay, no HLEN counter */
 270         0xf8, 0x12,             /* Port A, PIXCLK, HF# & FE#
 271                                  * strength to 2 */
 272         0xf9, 0x24,             /* Port B, HREF, VREF, PREF &
 273                                  * ALPHA strength to 4 */
 274 };
 275
 276 static const unsigned short init_fp[] = {
 277         0x59, 0,
 278         0xa0, 2070,             /* ACC reference */
 279         0xa3, 0,
 280         0xa4, 0,
 281         0xa8, 30,
 282         0xb2, 768,
 283         0xbe, 27,
 284         0x58, 0,
 285         0x26, 0,
 286         0x4b, 0x298,            /* PLL gain */
 287 };
 288
 289 static void
 290 vpx3220_dump_i2c (struct i2c_client *client)
 291 {
 292         int len = sizeof(init_common);
 293         const unsigned char *data = init_common;
 294
 295         while (len > 1) {
 296                 dprintk(1,
 297                         KERN_DEBUG "vpx3216b i2c reg 0x%02x data 0x%02x\n",
 298                         *data, vpx3220_read(client, *data));
 299                 data += 2;
 300                 len -= 2;
 301         }
 302 }
 303
 304 static int
 305 vpx3220_command (struct i2c_client *client,
 306                  unsigned int       cmd,
 307                  void              *arg)
 308 {
 309         struct vpx3220 *decoder = i2c_get_clientdata(client);
 310
 311         switch (cmd) {
 312         case 0:
 313         {
 314                 vpx3220_write_block(client, init_common,
 315                                     sizeof(init_common));
 316                 vpx3220_write_fp_block(client, init_fp,
 317                                        sizeof(init_fp) >> 1);
 318                 switch (decoder->norm) {
 319
 320                 case VIDEO_MODE_NTSC:
 321                         vpx3220_write_fp_block(client, init_ntsc,
 322                                                sizeof(init_ntsc) >> 1);
 323                         break;
 324
 325                 case VIDEO_MODE_PAL:
 326                         vpx3220_write_fp_block(client, init_pal,
 327                                                sizeof(init_pal) >> 1);
 328                         break;
 329                 case VIDEO_MODE_SECAM:
 330                         vpx3220_write_fp_block(client, init_secam,
 331                                                sizeof(init_secam) >> 1);
 332                         break;
 333                 default:
 334                         vpx3220_write_fp_block(client, init_pal,
 335                                                sizeof(init_pal) >> 1);
 336                         break;
 337                 }
 338         }
 339                 break;
 340
 341         case DECODER_DUMP:
 342         {
 343                 vpx3220_dump_i2c(client);
 344         }
 345                 break;
 346
 347         case DECODER_GET_CAPABILITIES:
 348         {
 349                 struct video_decoder_capability *cap = arg;
 350
 351                 dprintk(1, KERN_DEBUG "%s: DECODER_GET_CAPABILITIES\n",
 352                         I2C_NAME(client));
 353
 354                 cap->flags = VIDEO_DECODER_PAL |
 355                              VIDEO_DECODER_NTSC |
 356                              VIDEO_DECODER_SECAM |
 357                              VIDEO_DECODER_AUTO |
 358                              VIDEO_DECODER_CCIR;
 359                 cap->inputs = 3;
 360                 cap->outputs = 1;
 361         }
 362                 break;
 363
 364         case DECODER_GET_STATUS:
 365         {
 366                 int res = 0, status;
 367
 368                 dprintk(1, KERN_INFO "%s: DECODER_GET_STATUS\n",
 369                         I2C_NAME(client));
 370
 371                 status = vpx3220_fp_read(client, 0x0f3);
 372
 373                 dprintk(1, KERN_INFO "%s: status: 0x%04x\n", I2C_NAME(client),
 374                         status);
 375
 376                 if (status < 0)
 377                         return status;
 378
 379                 if ((status & 0x20) == 0) {
 380                         res |= DECODER_STATUS_GOOD | DECODER_STATUS_COLOR;
 381
 382                         switch (status & 0x18) {
 383
 384                         case 0x00:
 385                         case 0x10:
 386                         case 0x14:
 387                         case 0x18:
 388                                 res |= DECODER_STATUS_PAL;
 389                                 break;
 390
 391                         case 0x08:
 392                                 res |= DECODER_STATUS_SECAM;
 393                                 break;
 394
 395                         case 0x04:
 396                         case 0x0c:
 397                         case 0x1c:
 398                                 res |= DECODER_STATUS_NTSC;
 399                                 break;
 400                         }
 401                 }
 402
 403                 *(int *) arg = res;
 404         }
 405                 break;
 406
 407         case DECODER_SET_NORM:
 408         {
 409                 int *iarg = arg, data;
 410                 int temp_input;
 411
 412                 /* Here we back up the input selection because it gets
 413                    overwritten when we fill the registers with the
 414                    choosen video norm */
 415                 temp_input = vpx3220_fp_read(client, 0xf2);
 416
 417                 dprintk(1, KERN_DEBUG "%s: DECODER_SET_NORM %d\n",
 418                         I2C_NAME(client), *iarg);
 419                 switch (*iarg) {
 420
 421                 case VIDEO_MODE_NTSC:
 422                         vpx3220_write_fp_block(client, init_ntsc,
 423                                                sizeof(init_ntsc) >> 1);
 424                         dprintk(1, KERN_INFO "%s: norm switched to NTSC\n",
 425                                 I2C_NAME(client));
 426                         break;
 427
 428                 case VIDEO_MODE_PAL:
 429                         vpx3220_write_fp_block(client, init_pal,
 430                                                sizeof(init_pal) >> 1);
 431                         dprintk(1, KERN_INFO "%s: norm switched to PAL\n",
 432                                 I2C_NAME(client));
 433                         break;
 434
 435                 case VIDEO_MODE_SECAM:
 436                         vpx3220_write_fp_block(client, init_secam,
 437                                                sizeof(init_secam) >> 1);
 438                         dprintk(1, KERN_INFO "%s: norm switched to SECAM\n",
 439                                 I2C_NAME(client));
 440                         break;
 441
 442                 case VIDEO_MODE_AUTO:
 443                         /* FIXME This is only preliminary support */
 444                         data = vpx3220_fp_read(client, 0xf2) & 0x20;
 445                         vpx3220_fp_write(client, 0xf2, 0x00c0 | data);
 446                         dprintk(1, KERN_INFO "%s: norm switched to Auto\n",
 447                                 I2C_NAME(client));
 448                         break;
 449
 450                 default:
 451                         return -EINVAL;
 452
 453                 }
 454                 decoder->norm = *iarg;
 455
 456                 /* And here we set the backed up video input again */
 457                 vpx3220_fp_write(client, 0xf2, temp_input | 0x0010);
 458                 udelay(10);
 459         }
 460                 break;
 461
 462         case DECODER_SET_INPUT:
 463         {
 464                 int *iarg = arg, data;
 465
 466                 /* RJ:  *iarg = 0: ST8 (PCTV) input
 467                  *iarg = 1: COMPOSITE  input
 468                  *iarg = 2: SVHS       input  */
 469
 470                 const int input[3][2] = {
 471                         {0x0c, 0},
 472                         {0x0d, 0},
 473                         {0x0e, 1}
 474                 };
 475
 476                 if (*iarg < 0 || *iarg > 2)
 477                         return -EINVAL;
 478
 479                 dprintk(1, KERN_INFO "%s: input switched to %s\n",
 480                         I2C_NAME(client), inputs[*iarg]);
 481
 482                 vpx3220_write(client, 0x33, input[*iarg][0]);
 483
 484                 data = vpx3220_fp_read(client, 0xf2) & ~(0x0020);
 485                 if (data < 0)
 486                         return data;
 487                 /* 0x0010 is required to latch the setting */
 488                 vpx3220_fp_write(client, 0xf2,
 489                                  data | (input[*iarg][1] << 5) | 0x0010);
 490
 491                 udelay(10);
 492         }
 493                 break;
 494
 495         case DECODER_SET_OUTPUT:
 496         {
 497                 int *iarg = arg;
 498
 499                 /* not much choice of outputs */
 500                 if (*iarg != 0) {
 501                         return -EINVAL;
 502                 }
 503         }
 504                 break;
 505
 506         case DECODER_ENABLE_OUTPUT:
 507         {
 508                 int *iarg = arg;
 509
 510                 dprintk(1, KERN_DEBUG "%s: DECODER_ENABLE_OUTPUT %d\n",
 511                         I2C_NAME(client), *iarg);
 512
 513                 vpx3220_write(client, 0xf2, (*iarg ? 0x1b : 0x00));
 514         }
 515                 break;
 516
 517         case DECODER_SET_PICTURE:
 518         {
 519                 struct video_picture *pic = arg;
 520
 521                 if (decoder->bright != pic->brightness) {
 522                         /* We want -128 to 128 we get 0-65535 */
 523                         decoder->bright = pic->brightness;
 524                         vpx3220_write(client, 0xe6,
 525                                       (decoder->bright - 32768) >> 8);
 526                 }
 527                 if (decoder->contrast != pic->contrast) {
 528                         /* We want 0 to 64 we get 0-65535 */
 529                         /* Bit 7 and 8 is for noise shaping */
 530                         decoder->contrast = pic->contrast;
 531                         vpx3220_write(client, 0xe7,
 532                                       (decoder->contrast >> 10) + 192);
 533                 }
 534                 if (decoder->sat != pic->colour) {
 535                         /* We want 0 to 4096 we get 0-65535 */
 536                         decoder->sat = pic->colour;
 537                         vpx3220_fp_write(client, 0xa0,
 538                                          decoder->sat >> 4);
 539                 }
 540                 if (decoder->hue != pic->hue) {
 541                         /* We want -512 to 512 we get 0-65535 */
 542                         decoder->hue = pic->hue;
 543                         vpx3220_fp_write(client, 0x1c,
 544                                          ((decoder->hue - 32768) >> 6) & 0xFFF);
 545                 }
 546         }
 547                 break;
 548
 549         default:
 550                 return -EINVAL;
 551         }
 552
 553         return 0;
 554 }
 555
 556 static int
 557 vpx3220_init_client (struct i2c_client *client)
 558 {
 559         vpx3220_write_block(client, init_common, sizeof(init_common));
 560         vpx3220_write_fp_block(client, init_fp, sizeof(init_fp) >> 1);
 561         /* Default to PAL */
 562         vpx3220_write_fp_block(client, init_pal, sizeof(init_pal) >> 1);
 563
 564         return 0;
 565 }
 566
 567 /* -----------------------------------------------------------------------
 568  * Client managment code
 569  */
 570
 571 /*
 572  * Generic i2c probe
 573  * concerning the addresses: i2c wants 7 bit (without the r/w bit), so '>>1'
 574  */
 575 static unsigned short normal_i2c[] =
 576     { I2C_VPX3220 >> 1, (I2C_VPX3220 >> 1) + 4,
 577         I2C_CLIENT_END
 578 };
 579
 580 static unsigned short ignore = I2C_CLIENT_END;
 581
 582 static struct i2c_client_address_data addr_data = {
 583         .normal_i2c             = normal_i2c,
 584         .probe                  = &ignore,
 585         .ignore                 = &ignore,
 586 };
 587
 588 static struct i2c_driver vpx3220_i2c_driver;
 589
 590 static int
 591 vpx3220_detach_client (struct i2c_client *client)
 592 {
 593         struct vpx3220 *decoder = i2c_get_clientdata(client);
 594         int err;
 595
 596         err = i2c_detach_client(client);
 597         if (err) {
 598                 return err;
 599         }
 600
 601         kfree(decoder);
 602         kfree(client);
 603
 604         return 0;
 605 }
 606
 607 static int
 608 vpx3220_detect_client (struct i2c_adapter *adapter,
 609                        int                 address,
 610                        int                 kind)
 611 {
 612         int err;
 613         struct i2c_client *client;
 614         struct vpx3220 *decoder;
 615
 616         dprintk(1, VPX3220_DEBUG "%s\n", __func__);
 617
 618         /* Check if the adapter supports the needed features */
 619         if (!i2c_check_functionality
 620             (adapter, I2C_FUNC_SMBUS_BYTE_DATA | I2C_FUNC_SMBUS_WORD_DATA))
 621                 return 0;
 622
 623         client = kzalloc(sizeof(struct i2c_client), GFP_KERNEL);
 624         if (client == NULL) {
 625                 return -ENOMEM;
 626         }
 627
 628         client->addr = address;
 629         client->adapter = adapter;
 630         client->driver = &vpx3220_i2c_driver;
 631
 632         /* Check for manufacture ID and part number */
 633         if (kind < 0) {
 634                 u8 id;
 635                 u16 pn;
 636
 637                 id = vpx3220_read(client, 0x00);
 638                 if (id != 0xec) {
 639                         dprintk(1,
 640                                 KERN_INFO
 641                                 "vpx3220_attach: Wrong manufacturer ID (0x%02x)\n",
 642                                 id);
 643                         kfree(client);
 644                         return 0;
 645                 }
 646
 647                 pn = (vpx3220_read(client, 0x02) << 8) +
 648                     vpx3220_read(client, 0x01);
 649                 switch (pn) {
 650                 case 0x4680:
 651                         strlcpy(I2C_NAME(client), "vpx3220a",
 652                                 sizeof(I2C_NAME(client)));
 653                         break;
 654                 case 0x4260:
 655                         strlcpy(I2C_NAME(client), "vpx3216b",
 656                                 sizeof(I2C_NAME(client)));
 657                         break;
 658                 case 0x4280:
 659                         strlcpy(I2C_NAME(client), "vpx3214c",
 660                                 sizeof(I2C_NAME(client)));
 661                         break;
 662                 default:
 663                         dprintk(1,
 664                                 KERN_INFO
 665                                 "%s: Wrong part number (0x%04x)\n",
 666                                 __func__, pn);
 667                         kfree(client);
 668                         return 0;
 669                 }
 670         } else {
 671                 strlcpy(I2C_NAME(client), "forced vpx32xx",
 672                         sizeof(I2C_NAME(client)));
 673         }
 674
 675         decoder = kzalloc(sizeof(struct vpx3220), GFP_KERNEL);
 676         if (decoder == NULL) {
 677                 kfree(client);
 678                 return -ENOMEM;
 679         }
 680         decoder->norm = VIDEO_MODE_PAL;
 681         decoder->input = 0;
 682         decoder->enable = 1;
 683         decoder->bright = 32768;
 684         decoder->contrast = 32768;
 685         decoder->hue = 32768;
 686         decoder->sat = 32768;
 687         i2c_set_clientdata(client, decoder);
 688
 689         err = i2c_attach_client(client);
 690         if (err) {
 691                 kfree(client);
 692                 kfree(decoder);
 693                 return err;
 694         }
 695
 696         dprintk(1, KERN_INFO "%s: vpx32xx client found at address 0x%02x\n",
 697                 I2C_NAME(client), client->addr << 1);
 698
 699         vpx3220_init_client(client);
 700
 701         return 0;
 702 }
 703
 704 static int
 705 vpx3220_attach_adapter (struct i2c_adapter *adapter)
 706 {
 707         int ret;
 708
 709         ret = i2c_probe(adapter, &addr_data, &vpx3220_detect_client);
 710         dprintk(1, VPX3220_DEBUG "%s: i2c_probe returned %d\n",
 711                 __func__, ret);
 712         return ret;
 713 }
 714
 715 /* -----------------------------------------------------------------------
 716  * Driver initialization and cleanup code
 717  */
 718
 719 static struct i2c_driver vpx3220_i2c_driver = {
 720         .driver = {
 721                 .name = "vpx3220",
 722         },
 723
 724         .id = I2C_DRIVERID_VPX3220,
 725
 726         .attach_adapter = vpx3220_attach_adapter,
 727         .detach_client = vpx3220_detach_client,
 728         .command = vpx3220_command,
 729 };
 730
 731 static int __init
 732 vpx3220_init (void)
 733 {
 734         return i2c_add_driver(&vpx3220_i2c_driver);
 735 }
 736
 737 static void __exit
 738 vpx3220_cleanup (void)
 739 {
 740         i2c_del_driver(&vpx3220_i2c_driver);
 741 }
 742
 743 module_init(vpx3220_init);
 744 module_exit(vpx3220_cleanup);
 745
 746 MODULE_DESCRIPTION("vpx3220a/vpx3216b/vpx3214c video encoder driver");
 747 MODULE_AUTHOR("Laurent Pinchart");
 748 MODULE_LICENSE("GPL");