drivers/media/video/mt9v011.c

   1 /*
   2  * mt9v011 -Micron 1/4-Inch VGA Digital Image Sensor
   3  *
   4  * Copyright (c) 2009 Mauro Carvalho Chehab (mchehab@redhat.com)
   5  * This code is placed under the terms of the GNU General Public License v2
   6  */
   7
   8 #include <linux/i2c.h>
   9 #include <linux/slab.h>
  10 #include <linux/videodev2.h>
  11 #include <linux/delay.h>
  12 #include <asm/div64.h>
  13 #include <media/v4l2-device.h>
  14 #include <media/v4l2-chip-ident.h>
  15 #include <media/mt9v011.h>
  16
  17 MODULE_DESCRIPTION("Micron mt9v011 sensor driver");
  18 MODULE_AUTHOR("Mauro Carvalho Chehab <mchehab@redhat.com>");
  19 MODULE_LICENSE("GPL");
  20
  21 static int debug;
  22 module_param(debug, int, 0);
  23 MODULE_PARM_DESC(debug, "Debug level (0-2)");
  24
  25 #define R00_MT9V011_CHIP_VERSION        0x00
  26 #define R01_MT9V011_ROWSTART            0x01
  27 #define R02_MT9V011_COLSTART            0x02
  28 #define R03_MT9V011_HEIGHT              0x03
  29 #define R04_MT9V011_WIDTH               0x04
  30 #define R05_MT9V011_HBLANK              0x05
  31 #define R06_MT9V011_VBLANK              0x06
  32 #define R07_MT9V011_OUT_CTRL            0x07
  33 #define R09_MT9V011_SHUTTER_WIDTH       0x09
  34 #define R0A_MT9V011_CLK_SPEED           0x0a
  35 #define R0B_MT9V011_RESTART             0x0b
  36 #define R0C_MT9V011_SHUTTER_DELAY       0x0c
  37 #define R0D_MT9V011_RESET               0x0d
  38 #define R1E_MT9V011_DIGITAL_ZOOM        0x1e
  39 #define R20_MT9V011_READ_MODE           0x20
  40 #define R2B_MT9V011_GREEN_1_GAIN        0x2b
  41 #define R2C_MT9V011_BLUE_GAIN           0x2c
  42 #define R2D_MT9V011_RED_GAIN            0x2d
  43 #define R2E_MT9V011_GREEN_2_GAIN        0x2e
  44 #define R35_MT9V011_GLOBAL_GAIN         0x35
  45 #define RF1_MT9V011_CHIP_ENABLE         0xf1
  46
  47 #define MT9V011_VERSION                 0x8232
  48 #define MT9V011_REV_B_VERSION           0x8243
  49
  50 /* supported controls */
  51 static struct v4l2_queryctrl mt9v011_qctrl[] = {
  52         {
  53                 .id = V4L2_CID_GAIN,
  54                 .type = V4L2_CTRL_TYPE_INTEGER,
  55                 .name = "Gain",
  56                 .minimum = 0,
  57                 .maximum = (1 << 10) - 1,
  58                 .step = 1,
  59                 .default_value = 0x0020,
  60                 .flags = 0,
  61         }, {
  62                 .id = V4L2_CID_RED_BALANCE,
  63                 .type = V4L2_CTRL_TYPE_INTEGER,
  64                 .name = "Red Balance",
  65                 .minimum = -1 << 9,
  66                 .maximum = (1 << 9) - 1,
  67                 .step = 1,
  68                 .default_value = 0,
  69                 .flags = 0,
  70         }, {
  71                 .id = V4L2_CID_BLUE_BALANCE,
  72                 .type = V4L2_CTRL_TYPE_INTEGER,
  73                 .name = "Blue Balance",
  74                 .minimum = -1 << 9,
  75                 .maximum = (1 << 9) - 1,
  76                 .step = 1,
  77                 .default_value = 0,
  78                 .flags = 0,
  79         }, {
  80                 .id      = V4L2_CID_HFLIP,
  81                 .type    = V4L2_CTRL_TYPE_BOOLEAN,
  82                 .name    = "Mirror",
  83                 .minimum = 0,
  84                 .maximum = 1,
  85                 .step    = 1,
  86                 .default_value = 0,
  87                 .flags = 0,
  88         }, {
  89                 .id      = V4L2_CID_VFLIP,
  90                 .type    = V4L2_CTRL_TYPE_BOOLEAN,
  91                 .name    = "Vflip",
  92                 .minimum = 0,
  93                 .maximum = 1,
  94                 .step    = 1,
  95                 .default_value = 0,
  96                 .flags = 0,
  97         }, {
  98         }
  99 };
 100
 101 struct mt9v011 {
 102         struct v4l2_subdev sd;
 103         unsigned width, height;
 104         unsigned xtal;
 105         unsigned hflip:1;
 106         unsigned vflip:1;
 107
 108         u16 global_gain, red_bal, blue_bal;
 109 };
 110
 111 static inline struct mt9v011 *to_mt9v011(struct v4l2_subdev *sd)
 112 {
 113         return container_of(sd, struct mt9v011, sd);
 114 }
 115
 116 static int mt9v011_read(struct v4l2_subdev *sd, unsigned char addr)
 117 {
 118         struct i2c_client *c = v4l2_get_subdevdata(sd);
 119         __be16 buffer;
 120         int rc, val;
 121
 122         rc = i2c_master_send(c, &addr, 1);
 123         if (rc != 1)
 124                 v4l2_dbg(0, debug, sd,
 125                          "i2c i/o error: rc == %d (should be 1)\n", rc);
 126
 127         msleep(10);
 128
 129         rc = i2c_master_recv(c, (char *)&buffer, 2);
 130         if (rc != 2)
 131                 v4l2_dbg(0, debug, sd,
 132                          "i2c i/o error: rc == %d (should be 2)\n", rc);
 133
 134         val = be16_to_cpu(buffer);
 135
 136         v4l2_dbg(2, debug, sd, "mt9v011: read 0x%02x = 0x%04x\n", addr, val);
 137
 138         return val;
 139 }
 140
 141 static void mt9v011_write(struct v4l2_subdev *sd, unsigned char addr,
 142                                  u16 value)
 143 {
 144         struct i2c_client *c = v4l2_get_subdevdata(sd);
 145         unsigned char buffer[3];
 146         int rc;
 147
 148         buffer[0] = addr;
 149         buffer[1] = value >> 8;
 150         buffer[2] = value & 0xff;
 151
 152         v4l2_dbg(2, debug, sd,
 153                  "mt9v011: writing 0x%02x 0x%04x\n", buffer[0], value);
 154         rc = i2c_master_send(c, buffer, 3);
 155         if (rc != 3)
 156                 v4l2_dbg(0, debug, sd,
 157                          "i2c i/o error: rc == %d (should be 3)\n", rc);
 158 }
 159
 160
 161 struct i2c_reg_value {
 162         unsigned char reg;
 163         u16           value;
 164 };
 165
 166 /*
 167  * Values used at the original driver
 168  * Some values are marked as Reserved at the datasheet
 169  */
 170 static const struct i2c_reg_value mt9v011_init_default[] = {
 171                 { R0D_MT9V011_RESET, 0x0001 },
 172                 { R0D_MT9V011_RESET, 0x0000 },
 173
 174                 { R0C_MT9V011_SHUTTER_DELAY, 0x0000 },
 175                 { R09_MT9V011_SHUTTER_WIDTH, 0x1fc },
 176
 177                 { R0A_MT9V011_CLK_SPEED, 0x0000 },
 178                 { R1E_MT9V011_DIGITAL_ZOOM,  0x0000 },
 179
 180                 { R07_MT9V011_OUT_CTRL, 0x0002 },       /* chip enable */
 181 };
 182
 183 static void set_balance(struct v4l2_subdev *sd)
 184 {
 185         struct mt9v011 *core = to_mt9v011(sd);
 186         u16 green1_gain, green2_gain, blue_gain, red_gain;
 187
 188         green1_gain = core->global_gain;
 189         green2_gain = core->global_gain;
 190
 191         blue_gain = core->global_gain +
 192                     core->global_gain * core->blue_bal / (1 << 9);
 193
 194         red_gain = core->global_gain +
 195                    core->global_gain * core->blue_bal / (1 << 9);
 196
 197         mt9v011_write(sd, R2B_MT9V011_GREEN_1_GAIN, green1_gain);
 198         mt9v011_write(sd, R2E_MT9V011_GREEN_2_GAIN,  green1_gain);
 199         mt9v011_write(sd, R2C_MT9V011_BLUE_GAIN, blue_gain);
 200         mt9v011_write(sd, R2D_MT9V011_RED_GAIN, red_gain);
 201 }
 202
 203 static void calc_fps(struct v4l2_subdev *sd, u32 *numerator, u32 *denominator)
 204 {
 205         struct mt9v011 *core = to_mt9v011(sd);
 206         unsigned height, width, hblank, vblank, speed;
 207         unsigned row_time, t_time;
 208         u64 frames_per_ms;
 209         unsigned tmp;
 210
 211         height = mt9v011_read(sd, R03_MT9V011_HEIGHT);
 212         width = mt9v011_read(sd, R04_MT9V011_WIDTH);
 213         hblank = mt9v011_read(sd, R05_MT9V011_HBLANK);
 214         vblank = mt9v011_read(sd, R06_MT9V011_VBLANK);
 215         speed = mt9v011_read(sd, R0A_MT9V011_CLK_SPEED);
 216
 217         row_time = (width + 113 + hblank) * (speed + 2);
 218         t_time = row_time * (height + vblank + 1);
 219
 220         frames_per_ms = core->xtal * 1000l;
 221         do_div(frames_per_ms, t_time);
 222         tmp = frames_per_ms;
 223
 224         v4l2_dbg(1, debug, sd, "Programmed to %u.%03u fps (%d pixel clcks)\n",
 225                 tmp / 1000, tmp % 1000, t_time);
 226
 227         if (numerator && denominator) {
 228                 *numerator = 1000;
 229                 *denominator = (u32)frames_per_ms;
 230         }
 231 }
 232
 233 static u16 calc_speed(struct v4l2_subdev *sd, u32 numerator, u32 denominator)
 234 {
 235         struct mt9v011 *core = to_mt9v011(sd);
 236         unsigned height, width, hblank, vblank;
 237         unsigned row_time, line_time;
 238         u64 t_time, speed;
 239
 240         /* Avoid bogus calculus */
 241         if (!numerator || !denominator)
 242                 return 0;
 243
 244         height = mt9v011_read(sd, R03_MT9V011_HEIGHT);
 245         width = mt9v011_read(sd, R04_MT9V011_WIDTH);
 246         hblank = mt9v011_read(sd, R05_MT9V011_HBLANK);
 247         vblank = mt9v011_read(sd, R06_MT9V011_VBLANK);
 248
 249         row_time = width + 113 + hblank;
 250         line_time = height + vblank + 1;
 251
 252         t_time = core->xtal * ((u64)numerator);
 253         /* round to the closest value */
 254         t_time += denominator / 2;
 255         do_div(t_time, denominator);
 256
 257         speed = t_time;
 258         do_div(speed, row_time * line_time);
 259
 260         /* Avoid having a negative value for speed */
 261         if (speed < 2)
 262                 speed = 0;
 263         else
 264                 speed -= 2;
 265
 266         /* Avoid speed overflow */
 267         if (speed > 15)
 268                 return 15;
 269
 270         return (u16)speed;
 271 }
 272
 273 static void set_res(struct v4l2_subdev *sd)
 274 {
 275         struct mt9v011 *core = to_mt9v011(sd);
 276         unsigned vstart, hstart;
 277
 278         /*
 279          * The mt9v011 doesn't have scaling. So, in order to select the desired
 280          * resolution, we're cropping at the middle of the sensor.
 281          * hblank and vblank should be adjusted, in order to warrant that
 282          * we'll preserve the line timings for 30 fps, no matter what resolution
 283          * is selected.
 284          * NOTE: datasheet says that width (and height) should be filled with
 285          * width-1. However, this doesn't work, since one pixel per line will
 286          * be missing.
 287          */
 288
 289         hstart = 14 + (640 - core->width) / 2;
 290         mt9v011_write(sd, R02_MT9V011_COLSTART, hstart);
 291         mt9v011_write(sd, R04_MT9V011_WIDTH, core->width);
 292         mt9v011_write(sd, R05_MT9V011_HBLANK, 771 - core->width);
 293
 294         vstart = 8 + (480 - core->height) / 2;
 295         mt9v011_write(sd, R01_MT9V011_ROWSTART, vstart);
 296         mt9v011_write(sd, R03_MT9V011_HEIGHT, core->height);
 297         mt9v011_write(sd, R06_MT9V011_VBLANK, 508 - core->height);
 298
 299         calc_fps(sd, NULL, NULL);
 300 };
 301
 302 static void set_read_mode(struct v4l2_subdev *sd)
 303 {
 304         struct mt9v011 *core = to_mt9v011(sd);
 305         unsigned mode = 0x1000;
 306
 307         if (core->hflip)
 308                 mode |= 0x4000;
 309
 310         if (core->vflip)
 311                 mode |= 0x8000;
 312
 313         mt9v011_write(sd, R20_MT9V011_READ_MODE, mode);
 314 }
 315
 316 static int mt9v011_reset(struct v4l2_subdev *sd, u32 val)
 317 {
 318         int i;
 319
 320         for (i = 0; i < ARRAY_SIZE(mt9v011_init_default); i++)
 321                 mt9v011_write(sd, mt9v011_init_default[i].reg,
 322                                mt9v011_init_default[i].value);
 323
 324         set_balance(sd);
 325         set_res(sd);
 326         set_read_mode(sd);
 327
 328         return 0;
 329 };
 330
 331 static int mt9v011_g_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
 332 {
 333         struct mt9v011 *core = to_mt9v011(sd);
 334
 335         v4l2_dbg(1, debug, sd, "g_ctrl called\n");
 336
 337         switch (ctrl->id) {
 338         case V4L2_CID_GAIN:
 339                 ctrl->value = core->global_gain;
 340                 return 0;
 341         case V4L2_CID_RED_BALANCE:
 342                 ctrl->value = core->red_bal;
 343                 return 0;
 344         case V4L2_CID_BLUE_BALANCE:
 345                 ctrl->value = core->blue_bal;
 346                 return 0;
 347         case V4L2_CID_HFLIP:
 348                 ctrl->value = core->hflip ? 1 : 0;
 349                 return 0;
 350         case V4L2_CID_VFLIP:
 351                 ctrl->value = core->vflip ? 1 : 0;
 352                 return 0;
 353         }
 354         return -EINVAL;
 355 }
 356
 357 static int mt9v011_queryctrl(struct v4l2_subdev *sd, struct v4l2_queryctrl *qc)
 358 {
 359         int i;
 360
 361         v4l2_dbg(1, debug, sd, "queryctrl called\n");
 362
 363         for (i = 0; i < ARRAY_SIZE(mt9v011_qctrl); i++)
 364                 if (qc->id && qc->id == mt9v011_qctrl[i].id) {
 365                         memcpy(qc, &(mt9v011_qctrl[i]),
 366                                sizeof(*qc));
 367                         return 0;
 368                 }
 369
 370         return -EINVAL;
 371 }
 372
 373
 374 static int mt9v011_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
 375 {
 376         struct mt9v011 *core = to_mt9v011(sd);
 377         u8 i, n;
 378         n = ARRAY_SIZE(mt9v011_qctrl);
 379
 380         for (i = 0; i < n; i++) {
 381                 if (ctrl->id != mt9v011_qctrl[i].id)
 382                         continue;
 383                 if (ctrl->value < mt9v011_qctrl[i].minimum ||
 384                     ctrl->value > mt9v011_qctrl[i].maximum)
 385                         return -ERANGE;
 386                 v4l2_dbg(1, debug, sd, "s_ctrl: id=%d, value=%d\n",
 387                                         ctrl->id, ctrl->value);
 388                 break;
 389         }
 390
 391         switch (ctrl->id) {
 392         case V4L2_CID_GAIN:
 393                 core->global_gain = ctrl->value;
 394                 break;
 395         case V4L2_CID_RED_BALANCE:
 396                 core->red_bal = ctrl->value;
 397                 break;
 398         case V4L2_CID_BLUE_BALANCE:
 399                 core->blue_bal = ctrl->value;
 400                 break;
 401         case V4L2_CID_HFLIP:
 402                 core->hflip = ctrl->value;
 403                 set_read_mode(sd);
 404                 return 0;
 405         case V4L2_CID_VFLIP:
 406                 core->vflip = ctrl->value;
 407                 set_read_mode(sd);
 408                 return 0;
 409         default:
 410                 return -EINVAL;
 411         }
 412
 413         set_balance(sd);
 414
 415         return 0;
 416 }
 417
 418 static int mt9v011_enum_mbus_fmt(struct v4l2_subdev *sd, unsigned index,
 419                                         enum v4l2_mbus_pixelcode *code)
 420 {
 421         if (index > 0)
 422                 return -EINVAL;
 423
 424         *code = V4L2_MBUS_FMT_SGRBG8_1X8;
 425         return 0;
 426 }
 427
 428 static int mt9v011_try_mbus_fmt(struct v4l2_subdev *sd, struct v4l2_mbus_framefmt *fmt)
 429 {
 430         if (fmt->code != V4L2_MBUS_FMT_SGRBG8_1X8)
 431                 return -EINVAL;
 432
 433         v4l_bound_align_image(&fmt->width, 48, 639, 1,
 434                               &fmt->height, 32, 480, 1, 0);
 435         fmt->field = V4L2_FIELD_NONE;
 436         fmt->colorspace = V4L2_COLORSPACE_SRGB;
 437
 438         return 0;
 439 }
 440
 441 static int mt9v011_g_parm(struct v4l2_subdev *sd, struct v4l2_streamparm *parms)
 442 {
 443         struct v4l2_captureparm *cp = &parms->parm.capture;
 444
 445         if (parms->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
 446                 return -EINVAL;
 447
 448         memset(cp, 0, sizeof(struct v4l2_captureparm));
 449         cp->capability = V4L2_CAP_TIMEPERFRAME;
 450         calc_fps(sd,
 451                  &cp->timeperframe.numerator,
 452                  &cp->timeperframe.denominator);
 453
 454         return 0;
 455 }
 456
 457 static int mt9v011_s_parm(struct v4l2_subdev *sd, struct v4l2_streamparm *parms)
 458 {
 459         struct v4l2_captureparm *cp = &parms->parm.capture;
 460         struct v4l2_fract *tpf = &cp->timeperframe;
 461         u16 speed;
 462
 463         if (parms->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
 464                 return -EINVAL;
 465         if (cp->extendedmode != 0)
 466                 return -EINVAL;
 467
 468         speed = calc_speed(sd, tpf->numerator, tpf->denominator);
 469
 470         mt9v011_write(sd, R0A_MT9V011_CLK_SPEED, speed);
 471         v4l2_dbg(1, debug, sd, "Setting speed to %d\n", speed);
 472
 473         /* Recalculate and update fps info */
 474         calc_fps(sd, &tpf->numerator, &tpf->denominator);
 475
 476         return 0;
 477 }
 478
 479 static int mt9v011_s_mbus_fmt(struct v4l2_subdev *sd, struct v4l2_mbus_framefmt *fmt)
 480 {
 481         struct mt9v011 *core = to_mt9v011(sd);
 482         int rc;
 483
 484         rc = mt9v011_try_mbus_fmt(sd, fmt);
 485         if (rc < 0)
 486                 return -EINVAL;
 487
 488         core->width = fmt->width;
 489         core->height = fmt->height;
 490
 491         set_res(sd);
 492
 493         return 0;
 494 }
 495
 496 #ifdef CONFIG_VIDEO_ADV_DEBUG
 497 static int mt9v011_g_register(struct v4l2_subdev *sd,
 498                               struct v4l2_dbg_register *reg)
 499 {
 500         struct i2c_client *client = v4l2_get_subdevdata(sd);
 501
 502         if (!v4l2_chip_match_i2c_client(client, &reg->match))
 503                 return -EINVAL;
 504         if (!capable(CAP_SYS_ADMIN))
 505                 return -EPERM;
 506
 507         reg->val = mt9v011_read(sd, reg->reg & 0xff);
 508         reg->size = 2;
 509
 510         return 0;
 511 }
 512
 513 static int mt9v011_s_register(struct v4l2_subdev *sd,
 514                               struct v4l2_dbg_register *reg)
 515 {
 516         struct i2c_client *client = v4l2_get_subdevdata(sd);
 517
 518         if (!v4l2_chip_match_i2c_client(client, &reg->match))
 519                 return -EINVAL;
 520         if (!capable(CAP_SYS_ADMIN))
 521                 return -EPERM;
 522
 523         mt9v011_write(sd, reg->reg & 0xff, reg->val & 0xffff);
 524
 525         return 0;
 526 }
 527 #endif
 528
 529 static int mt9v011_g_chip_ident(struct v4l2_subdev *sd,
 530                                 struct v4l2_dbg_chip_ident *chip)
 531 {
 532         u16 version;
 533         struct i2c_client *client = v4l2_get_subdevdata(sd);
 534
 535         version = mt9v011_read(sd, R00_MT9V011_CHIP_VERSION);
 536
 537         return v4l2_chip_ident_i2c_client(client, chip, V4L2_IDENT_MT9V011,
 538                                           version);
 539 }
 540
 541 static const struct v4l2_subdev_core_ops mt9v011_core_ops = {
 542         .queryctrl = mt9v011_queryctrl,
 543         .g_ctrl = mt9v011_g_ctrl,
 544         .s_ctrl = mt9v011_s_ctrl,
 545         .reset = mt9v011_reset,
 546         .g_chip_ident = mt9v011_g_chip_ident,
 547 #ifdef CONFIG_VIDEO_ADV_DEBUG
 548         .g_register = mt9v011_g_register,
 549         .s_register = mt9v011_s_register,
 550 #endif
 551 };
 552
 553 static const struct v4l2_subdev_video_ops mt9v011_video_ops = {
 554         .enum_mbus_fmt = mt9v011_enum_mbus_fmt,
 555         .try_mbus_fmt = mt9v011_try_mbus_fmt,
 556         .s_mbus_fmt = mt9v011_s_mbus_fmt,
 557         .g_parm = mt9v011_g_parm,
 558         .s_parm = mt9v011_s_parm,
 559 };
 560
 561 static const struct v4l2_subdev_ops mt9v011_ops = {
 562         .core  = &mt9v011_core_ops,
 563         .video = &mt9v011_video_ops,
 564 };
 565
 566
 567 /****************************************************************************
 568                         I2C Client & Driver
 569  ****************************************************************************/
 570
 571 static int mt9v011_probe(struct i2c_client *c,
 572                          const struct i2c_device_id *id)
 573 {
 574         u16 version;
 575         struct mt9v011 *core;
 576         struct v4l2_subdev *sd;
 577
 578         /* Check if the adapter supports the needed features */
 579         if (!i2c_check_functionality(c->adapter,
 580              I2C_FUNC_SMBUS_READ_BYTE | I2C_FUNC_SMBUS_WRITE_BYTE_DATA))
 581                 return -EIO;
 582
 583         core = kzalloc(sizeof(struct mt9v011), GFP_KERNEL);
 584         if (!core)
 585                 return -ENOMEM;
 586
 587         sd = &core->sd;
 588         v4l2_i2c_subdev_init(sd, c, &mt9v011_ops);
 589
 590         /* Check if the sensor is really a MT9V011 */
 591         version = mt9v011_read(sd, R00_MT9V011_CHIP_VERSION);
 592         if ((version != MT9V011_VERSION) &&
 593             (version != MT9V011_REV_B_VERSION)) {
 594                 v4l2_info(sd, "*** unknown micron chip detected (0x%04x).\n",
 595                           version);
 596                 kfree(core);
 597                 return -EINVAL;
 598         }
 599
 600         core->global_gain = 0x0024;
 601         core->width  = 640;
 602         core->height = 480;
 603         core->xtal = 27000000;  /* Hz */
 604
 605         if (c->dev.platform_data) {
 606                 struct mt9v011_platform_data *pdata = c->dev.platform_data;
 607
 608                 core->xtal = pdata->xtal;
 609                 v4l2_dbg(1, debug, sd, "xtal set to %d.%03d MHz\n",
 610                         core->xtal / 1000000, (core->xtal / 1000) % 1000);
 611         }
 612
 613         v4l_info(c, "chip found @ 0x%02x (%s - chip version 0x%04x)\n",
 614                  c->addr << 1, c->adapter->name, version);
 615
 616         return 0;
 617 }
 618
 619 static int mt9v011_remove(struct i2c_client *c)
 620 {
 621         struct v4l2_subdev *sd = i2c_get_clientdata(c);
 622
 623         v4l2_dbg(1, debug, sd,
 624                 "mt9v011.c: removing mt9v011 adapter on address 0x%x\n",
 625                 c->addr << 1);
 626
 627         v4l2_device_unregister_subdev(sd);
 628         kfree(to_mt9v011(sd));
 629         return 0;
 630 }
 631
 632 /* ----------------------------------------------------------------------- */
 633
 634 static const struct i2c_device_id mt9v011_id[] = {
 635         { "mt9v011", 0 },
 636         { }
 637 };
 638 MODULE_DEVICE_TABLE(i2c, mt9v011_id);
 639
 640 static struct i2c_driver mt9v011_driver = {
 641         .driver = {
 642                 .owner  = THIS_MODULE,
 643                 .name   = "mt9v011",
 644         },
 645         .probe          = mt9v011_probe,
 646         .remove         = mt9v011_remove,
 647         .id_table       = mt9v011_id,
 648 };
 649
 650 static __init int init_mt9v011(void)
 651 {
 652         return i2c_add_driver(&mt9v011_driver);
 653 }
 654
 655 static __exit void exit_mt9v011(void)
 656 {
 657         i2c_del_driver(&mt9v011_driver);
 658 }
 659
 660 module_init(init_mt9v011);
 661 module_exit(exit_mt9v011);