drivers/media/video/mt9v032.c

   1 /*
   2  * Driver for MT9V032 CMOS Image Sensor from Micron
   3  *
   4  * Copyright (C) 2010, Laurent Pinchart <laurent.pinchart@ideasonboard.com>
   5  *
   6  * Based on the MT9M001 driver,
   7  *
   8  * Copyright (C) 2008, Guennadi Liakhovetski <kernel@pengutronix.de>
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License version 2 as
  12  * published by the Free Software Foundation.
  13  */
  14
  15 #include <linux/delay.h>
  16 #include <linux/i2c.h>
  17 #include <linux/log2.h>
  18 #include <linux/mutex.h>
  19 #include <linux/slab.h>
  20 #include <linux/videodev2.h>
  21 #include <linux/v4l2-mediabus.h>
  22 #include <linux/module.h>
  23
  24 #include <media/mt9v032.h>
  25 #include <media/v4l2-ctrls.h>
  26 #include <media/v4l2-device.h>
  27 #include <media/v4l2-subdev.h>
  28
  29 #define MT9V032_PIXEL_ARRAY_HEIGHT                      492
  30 #define MT9V032_PIXEL_ARRAY_WIDTH                       782
  31
  32 #define MT9V032_CHIP_VERSION                            0x00
  33 #define         MT9V032_CHIP_ID_REV1                    0x1311
  34 #define         MT9V032_CHIP_ID_REV3                    0x1313
  35 #define MT9V032_COLUMN_START                            0x01
  36 #define         MT9V032_COLUMN_START_MIN                1
  37 #define         MT9V032_COLUMN_START_DEF                1
  38 #define         MT9V032_COLUMN_START_MAX                752
  39 #define MT9V032_ROW_START                               0x02
  40 #define         MT9V032_ROW_START_MIN                   4
  41 #define         MT9V032_ROW_START_DEF                   5
  42 #define         MT9V032_ROW_START_MAX                   482
  43 #define MT9V032_WINDOW_HEIGHT                           0x03
  44 #define         MT9V032_WINDOW_HEIGHT_MIN               1
  45 #define         MT9V032_WINDOW_HEIGHT_DEF               480
  46 #define         MT9V032_WINDOW_HEIGHT_MAX               480
  47 #define MT9V032_WINDOW_WIDTH                            0x04
  48 #define         MT9V032_WINDOW_WIDTH_MIN                1
  49 #define         MT9V032_WINDOW_WIDTH_DEF                752
  50 #define         MT9V032_WINDOW_WIDTH_MAX                752
  51 #define MT9V032_HORIZONTAL_BLANKING                     0x05
  52 #define         MT9V032_HORIZONTAL_BLANKING_MIN         43
  53 #define         MT9V032_HORIZONTAL_BLANKING_MAX         1023
  54 #define MT9V032_VERTICAL_BLANKING                       0x06
  55 #define         MT9V032_VERTICAL_BLANKING_MIN           4
  56 #define         MT9V032_VERTICAL_BLANKING_MAX           3000
  57 #define MT9V032_CHIP_CONTROL                            0x07
  58 #define         MT9V032_CHIP_CONTROL_MASTER_MODE        (1 << 3)
  59 #define         MT9V032_CHIP_CONTROL_DOUT_ENABLE        (1 << 7)
  60 #define         MT9V032_CHIP_CONTROL_SEQUENTIAL         (1 << 8)
  61 #define MT9V032_SHUTTER_WIDTH1                          0x08
  62 #define MT9V032_SHUTTER_WIDTH2                          0x09
  63 #define MT9V032_SHUTTER_WIDTH_CONTROL                   0x0a
  64 #define MT9V032_TOTAL_SHUTTER_WIDTH                     0x0b
  65 #define         MT9V032_TOTAL_SHUTTER_WIDTH_MIN         1
  66 #define         MT9V032_TOTAL_SHUTTER_WIDTH_DEF         480
  67 #define         MT9V032_TOTAL_SHUTTER_WIDTH_MAX         32767
  68 #define MT9V032_RESET                                   0x0c
  69 #define MT9V032_READ_MODE                               0x0d
  70 #define         MT9V032_READ_MODE_ROW_BIN_MASK          (3 << 0)
  71 #define         MT9V032_READ_MODE_ROW_BIN_SHIFT         0
  72 #define         MT9V032_READ_MODE_COLUMN_BIN_MASK       (3 << 2)
  73 #define         MT9V032_READ_MODE_COLUMN_BIN_SHIFT      2
  74 #define         MT9V032_READ_MODE_ROW_FLIP              (1 << 4)
  75 #define         MT9V032_READ_MODE_COLUMN_FLIP           (1 << 5)
  76 #define         MT9V032_READ_MODE_DARK_COLUMNS          (1 << 6)
  77 #define         MT9V032_READ_MODE_DARK_ROWS             (1 << 7)
  78 #define MT9V032_PIXEL_OPERATION_MODE                    0x0f
  79 #define         MT9V032_PIXEL_OPERATION_MODE_COLOR      (1 << 2)
  80 #define         MT9V032_PIXEL_OPERATION_MODE_HDR        (1 << 6)
  81 #define MT9V032_ANALOG_GAIN                             0x35
  82 #define         MT9V032_ANALOG_GAIN_MIN                 16
  83 #define         MT9V032_ANALOG_GAIN_DEF                 16
  84 #define         MT9V032_ANALOG_GAIN_MAX                 64
  85 #define MT9V032_MAX_ANALOG_GAIN                         0x36
  86 #define         MT9V032_MAX_ANALOG_GAIN_MAX             127
  87 #define MT9V032_FRAME_DARK_AVERAGE                      0x42
  88 #define MT9V032_DARK_AVG_THRESH                         0x46
  89 #define         MT9V032_DARK_AVG_LOW_THRESH_MASK        (255 << 0)
  90 #define         MT9V032_DARK_AVG_LOW_THRESH_SHIFT       0
  91 #define         MT9V032_DARK_AVG_HIGH_THRESH_MASK       (255 << 8)
  92 #define         MT9V032_DARK_AVG_HIGH_THRESH_SHIFT      8
  93 #define MT9V032_ROW_NOISE_CORR_CONTROL                  0x70
  94 #define         MT9V032_ROW_NOISE_CORR_ENABLE           (1 << 5)
  95 #define         MT9V032_ROW_NOISE_CORR_USE_BLK_AVG      (1 << 7)
  96 #define MT9V032_PIXEL_CLOCK                             0x74
  97 #define         MT9V032_PIXEL_CLOCK_INV_LINE            (1 << 0)
  98 #define         MT9V032_PIXEL_CLOCK_INV_FRAME           (1 << 1)
  99 #define         MT9V032_PIXEL_CLOCK_XOR_LINE            (1 << 2)
 100 #define         MT9V032_PIXEL_CLOCK_CONT_LINE           (1 << 3)
 101 #define         MT9V032_PIXEL_CLOCK_INV_PXL_CLK         (1 << 4)
 102 #define MT9V032_TEST_PATTERN                            0x7f
 103 #define         MT9V032_TEST_PATTERN_DATA_MASK          (1023 << 0)
 104 #define         MT9V032_TEST_PATTERN_DATA_SHIFT         0
 105 #define         MT9V032_TEST_PATTERN_USE_DATA           (1 << 10)
 106 #define         MT9V032_TEST_PATTERN_GRAY_MASK          (3 << 11)
 107 #define         MT9V032_TEST_PATTERN_GRAY_NONE          (0 << 11)
 108 #define         MT9V032_TEST_PATTERN_GRAY_VERTICAL      (1 << 11)
 109 #define         MT9V032_TEST_PATTERN_GRAY_HORIZONTAL    (2 << 11)
 110 #define         MT9V032_TEST_PATTERN_GRAY_DIAGONAL      (3 << 11)
 111 #define         MT9V032_TEST_PATTERN_ENABLE             (1 << 13)
 112 #define         MT9V032_TEST_PATTERN_FLIP               (1 << 14)
 113 #define MT9V032_AEC_AGC_ENABLE                          0xaf
 114 #define         MT9V032_AEC_ENABLE                      (1 << 0)
 115 #define         MT9V032_AGC_ENABLE                      (1 << 1)
 116 #define MT9V032_THERMAL_INFO                            0xc1
 117
 118 struct mt9v032 {
 119         struct v4l2_subdev subdev;
 120         struct media_pad pad;
 121
 122         struct v4l2_mbus_framefmt format;
 123         struct v4l2_rect crop;
 124
 125         struct v4l2_ctrl_handler ctrls;
 126
 127         struct mutex power_lock;
 128         int power_count;
 129
 130         struct mt9v032_platform_data *pdata;
 131         u16 chip_control;
 132         u16 aec_agc;
 133 };
 134
 135 static struct mt9v032 *to_mt9v032(struct v4l2_subdev *sd)
 136 {
 137         return container_of(sd, struct mt9v032, subdev);
 138 }
 139
 140 static int mt9v032_read(struct i2c_client *client, const u8 reg)
 141 {
 142         s32 data = i2c_smbus_read_word_swapped(client, reg);
 143         dev_dbg(&client->dev, "%s: read 0x%04x from 0x%02x\n", __func__,
 144                 data, reg);
 145         return data;
 146 }
 147
 148 static int mt9v032_write(struct i2c_client *client, const u8 reg,
 149                          const u16 data)
 150 {
 151         dev_dbg(&client->dev, "%s: writing 0x%04x to 0x%02x\n", __func__,
 152                 data, reg);
 153         return i2c_smbus_write_word_swapped(client, reg, data);
 154 }
 155
 156 static int mt9v032_set_chip_control(struct mt9v032 *mt9v032, u16 clear, u16 set)
 157 {
 158         struct i2c_client *client = v4l2_get_subdevdata(&mt9v032->subdev);
 159         u16 value = (mt9v032->chip_control & ~clear) | set;
 160         int ret;
 161
 162         ret = mt9v032_write(client, MT9V032_CHIP_CONTROL, value);
 163         if (ret < 0)
 164                 return ret;
 165
 166         mt9v032->chip_control = value;
 167         return 0;
 168 }
 169
 170 static int
 171 mt9v032_update_aec_agc(struct mt9v032 *mt9v032, u16 which, int enable)
 172 {
 173         struct i2c_client *client = v4l2_get_subdevdata(&mt9v032->subdev);
 174         u16 value = mt9v032->aec_agc;
 175         int ret;
 176
 177         if (enable)
 178                 value |= which;
 179         else
 180                 value &= ~which;
 181
 182         ret = mt9v032_write(client, MT9V032_AEC_AGC_ENABLE, value);
 183         if (ret < 0)
 184                 return ret;
 185
 186         mt9v032->aec_agc = value;
 187         return 0;
 188 }
 189
 190 static int mt9v032_power_on(struct mt9v032 *mt9v032)
 191 {
 192         struct i2c_client *client = v4l2_get_subdevdata(&mt9v032->subdev);
 193         int ret;
 194
 195         if (mt9v032->pdata->set_clock) {
 196                 mt9v032->pdata->set_clock(&mt9v032->subdev, 25000000);
 197                 udelay(1);
 198         }
 199
 200         /* Reset the chip and stop data read out */
 201         ret = mt9v032_write(client, MT9V032_RESET, 1);
 202         if (ret < 0)
 203                 return ret;
 204
 205         ret = mt9v032_write(client, MT9V032_RESET, 0);
 206         if (ret < 0)
 207                 return ret;
 208
 209         return mt9v032_write(client, MT9V032_CHIP_CONTROL, 0);
 210 }
 211
 212 static void mt9v032_power_off(struct mt9v032 *mt9v032)
 213 {
 214         if (mt9v032->pdata->set_clock)
 215                 mt9v032->pdata->set_clock(&mt9v032->subdev, 0);
 216 }
 217
 218 static int __mt9v032_set_power(struct mt9v032 *mt9v032, bool on)
 219 {
 220         struct i2c_client *client = v4l2_get_subdevdata(&mt9v032->subdev);
 221         int ret;
 222
 223         if (!on) {
 224                 mt9v032_power_off(mt9v032);
 225                 return 0;
 226         }
 227
 228         ret = mt9v032_power_on(mt9v032);
 229         if (ret < 0)
 230                 return ret;
 231
 232         /* Configure the pixel clock polarity */
 233         if (mt9v032->pdata && mt9v032->pdata->clk_pol) {
 234                 ret = mt9v032_write(client, MT9V032_PIXEL_CLOCK,
 235                                 MT9V032_PIXEL_CLOCK_INV_PXL_CLK);
 236                 if (ret < 0)
 237                         return ret;
 238         }
 239
 240         /* Disable the noise correction algorithm and restore the controls. */
 241         ret = mt9v032_write(client, MT9V032_ROW_NOISE_CORR_CONTROL, 0);
 242         if (ret < 0)
 243                 return ret;
 244
 245         return v4l2_ctrl_handler_setup(&mt9v032->ctrls);
 246 }
 247
 248 /* -----------------------------------------------------------------------------
 249  * V4L2 subdev video operations
 250  */
 251
 252 static struct v4l2_mbus_framefmt *
 253 __mt9v032_get_pad_format(struct mt9v032 *mt9v032, struct v4l2_subdev_fh *fh,
 254                          unsigned int pad, enum v4l2_subdev_format_whence which)
 255 {
 256         switch (which) {
 257         case V4L2_SUBDEV_FORMAT_TRY:
 258                 return v4l2_subdev_get_try_format(fh, pad);
 259         case V4L2_SUBDEV_FORMAT_ACTIVE:
 260                 return &mt9v032->format;
 261         default:
 262                 return NULL;
 263         }
 264 }
 265
 266 static struct v4l2_rect *
 267 __mt9v032_get_pad_crop(struct mt9v032 *mt9v032, struct v4l2_subdev_fh *fh,
 268                        unsigned int pad, enum v4l2_subdev_format_whence which)
 269 {
 270         switch (which) {
 271         case V4L2_SUBDEV_FORMAT_TRY:
 272                 return v4l2_subdev_get_try_crop(fh, pad);
 273         case V4L2_SUBDEV_FORMAT_ACTIVE:
 274                 return &mt9v032->crop;
 275         default:
 276                 return NULL;
 277         }
 278 }
 279
 280 static int mt9v032_s_stream(struct v4l2_subdev *subdev, int enable)
 281 {
 282         const u16 mode = MT9V032_CHIP_CONTROL_MASTER_MODE
 283                        | MT9V032_CHIP_CONTROL_DOUT_ENABLE
 284                        | MT9V032_CHIP_CONTROL_SEQUENTIAL;
 285         struct i2c_client *client = v4l2_get_subdevdata(subdev);
 286         struct mt9v032 *mt9v032 = to_mt9v032(subdev);
 287         struct v4l2_mbus_framefmt *format = &mt9v032->format;
 288         struct v4l2_rect *crop = &mt9v032->crop;
 289         unsigned int hratio;
 290         unsigned int vratio;
 291         int ret;
 292
 293         if (!enable)
 294                 return mt9v032_set_chip_control(mt9v032, mode, 0);
 295
 296         /* Configure the window size and row/column bin */
 297         hratio = DIV_ROUND_CLOSEST(crop->width, format->width);
 298         vratio = DIV_ROUND_CLOSEST(crop->height, format->height);
 299
 300         ret = mt9v032_write(client, MT9V032_READ_MODE,
 301                     (hratio - 1) << MT9V032_READ_MODE_ROW_BIN_SHIFT |
 302                     (vratio - 1) << MT9V032_READ_MODE_COLUMN_BIN_SHIFT);
 303         if (ret < 0)
 304                 return ret;
 305
 306         ret = mt9v032_write(client, MT9V032_COLUMN_START, crop->left);
 307         if (ret < 0)
 308                 return ret;
 309
 310         ret = mt9v032_write(client, MT9V032_ROW_START, crop->top);
 311         if (ret < 0)
 312                 return ret;
 313
 314         ret = mt9v032_write(client, MT9V032_WINDOW_WIDTH, crop->width);
 315         if (ret < 0)
 316                 return ret;
 317
 318         ret = mt9v032_write(client, MT9V032_WINDOW_HEIGHT, crop->height);
 319         if (ret < 0)
 320                 return ret;
 321
 322         ret = mt9v032_write(client, MT9V032_HORIZONTAL_BLANKING,
 323                             max(43, 660 - crop->width));
 324         if (ret < 0)
 325                 return ret;
 326
 327         /* Switch to master "normal" mode */
 328         return mt9v032_set_chip_control(mt9v032, 0, mode);
 329 }
 330
 331 static int mt9v032_enum_mbus_code(struct v4l2_subdev *subdev,
 332                                   struct v4l2_subdev_fh *fh,
 333                                   struct v4l2_subdev_mbus_code_enum *code)
 334 {
 335         if (code->index > 0)
 336                 return -EINVAL;
 337
 338         code->code = V4L2_MBUS_FMT_SGRBG10_1X10;
 339         return 0;
 340 }
 341
 342 static int mt9v032_enum_frame_size(struct v4l2_subdev *subdev,
 343                                    struct v4l2_subdev_fh *fh,
 344                                    struct v4l2_subdev_frame_size_enum *fse)
 345 {
 346         if (fse->index >= 8 || fse->code != V4L2_MBUS_FMT_SGRBG10_1X10)
 347                 return -EINVAL;
 348
 349         fse->min_width = MT9V032_WINDOW_WIDTH_DEF / fse->index;
 350         fse->max_width = fse->min_width;
 351         fse->min_height = MT9V032_WINDOW_HEIGHT_DEF / fse->index;
 352         fse->max_height = fse->min_height;
 353
 354         return 0;
 355 }
 356
 357 static int mt9v032_get_format(struct v4l2_subdev *subdev,
 358                               struct v4l2_subdev_fh *fh,
 359                               struct v4l2_subdev_format *format)
 360 {
 361         struct mt9v032 *mt9v032 = to_mt9v032(subdev);
 362
 363         format->format = *__mt9v032_get_pad_format(mt9v032, fh, format->pad,
 364                                                    format->which);
 365         return 0;
 366 }
 367
 368 static int mt9v032_set_format(struct v4l2_subdev *subdev,
 369                               struct v4l2_subdev_fh *fh,
 370                               struct v4l2_subdev_format *format)
 371 {
 372         struct mt9v032 *mt9v032 = to_mt9v032(subdev);
 373         struct v4l2_mbus_framefmt *__format;
 374         struct v4l2_rect *__crop;
 375         unsigned int width;
 376         unsigned int height;
 377         unsigned int hratio;
 378         unsigned int vratio;
 379
 380         __crop = __mt9v032_get_pad_crop(mt9v032, fh, format->pad,
 381                                         format->which);
 382
 383         /* Clamp the width and height to avoid dividing by zero. */
 384         width = clamp_t(unsigned int, ALIGN(format->format.width, 2),
 385                         max(__crop->width / 8, MT9V032_WINDOW_WIDTH_MIN),
 386                         __crop->width);
 387         height = clamp_t(unsigned int, ALIGN(format->format.height, 2),
 388                          max(__crop->height / 8, MT9V032_WINDOW_HEIGHT_MIN),
 389                          __crop->height);
 390
 391         hratio = DIV_ROUND_CLOSEST(__crop->width, width);
 392         vratio = DIV_ROUND_CLOSEST(__crop->height, height);
 393
 394         __format = __mt9v032_get_pad_format(mt9v032, fh, format->pad,
 395                                             format->which);
 396         __format->width = __crop->width / hratio;
 397         __format->height = __crop->height / vratio;
 398
 399         format->format = *__format;
 400
 401         return 0;
 402 }
 403
 404 static int mt9v032_get_crop(struct v4l2_subdev *subdev,
 405                             struct v4l2_subdev_fh *fh,
 406                             struct v4l2_subdev_crop *crop)
 407 {
 408         struct mt9v032 *mt9v032 = to_mt9v032(subdev);
 409
 410         crop->rect = *__mt9v032_get_pad_crop(mt9v032, fh, crop->pad,
 411                                              crop->which);
 412         return 0;
 413 }
 414
 415 static int mt9v032_set_crop(struct v4l2_subdev *subdev,
 416                             struct v4l2_subdev_fh *fh,
 417                             struct v4l2_subdev_crop *crop)
 418 {
 419         struct mt9v032 *mt9v032 = to_mt9v032(subdev);
 420         struct v4l2_mbus_framefmt *__format;
 421         struct v4l2_rect *__crop;
 422         struct v4l2_rect rect;
 423
 424         /* Clamp the crop rectangle boundaries and align them to a non multiple
 425          * of 2 pixels to ensure a GRBG Bayer pattern.
 426          */
 427         rect.left = clamp(ALIGN(crop->rect.left + 1, 2) - 1,
 428                           MT9V032_COLUMN_START_MIN,
 429                           MT9V032_COLUMN_START_MAX);
 430         rect.top = clamp(ALIGN(crop->rect.top + 1, 2) - 1,
 431                          MT9V032_ROW_START_MIN,
 432                          MT9V032_ROW_START_MAX);
 433         rect.width = clamp(ALIGN(crop->rect.width, 2),
 434                            MT9V032_WINDOW_WIDTH_MIN,
 435                            MT9V032_WINDOW_WIDTH_MAX);
 436         rect.height = clamp(ALIGN(crop->rect.height, 2),
 437                             MT9V032_WINDOW_HEIGHT_MIN,
 438                             MT9V032_WINDOW_HEIGHT_MAX);
 439
 440         rect.width = min(rect.width, MT9V032_PIXEL_ARRAY_WIDTH - rect.left);
 441         rect.height = min(rect.height, MT9V032_PIXEL_ARRAY_HEIGHT - rect.top);
 442
 443         __crop = __mt9v032_get_pad_crop(mt9v032, fh, crop->pad, crop->which);
 444
 445         if (rect.width != __crop->width || rect.height != __crop->height) {
 446                 /* Reset the output image size if the crop rectangle size has
 447                  * been modified.
 448                  */
 449                 __format = __mt9v032_get_pad_format(mt9v032, fh, crop->pad,
 450                                                     crop->which);
 451                 __format->width = rect.width;
 452                 __format->height = rect.height;
 453         }
 454
 455         *__crop = rect;
 456         crop->rect = rect;
 457
 458         return 0;
 459 }
 460
 461 /* -----------------------------------------------------------------------------
 462  * V4L2 subdev control operations
 463  */
 464
 465 #define V4L2_CID_TEST_PATTERN           (V4L2_CID_USER_BASE | 0x1001)
 466
 467 static int mt9v032_s_ctrl(struct v4l2_ctrl *ctrl)
 468 {
 469         struct mt9v032 *mt9v032 =
 470                         container_of(ctrl->handler, struct mt9v032, ctrls);
 471         struct i2c_client *client = v4l2_get_subdevdata(&mt9v032->subdev);
 472         u16 data;
 473
 474         switch (ctrl->id) {
 475         case V4L2_CID_AUTOGAIN:
 476                 return mt9v032_update_aec_agc(mt9v032, MT9V032_AGC_ENABLE,
 477                                               ctrl->val);
 478
 479         case V4L2_CID_GAIN:
 480                 return mt9v032_write(client, MT9V032_ANALOG_GAIN, ctrl->val);
 481
 482         case V4L2_CID_EXPOSURE_AUTO:
 483                 return mt9v032_update_aec_agc(mt9v032, MT9V032_AEC_ENABLE,
 484                                               ctrl->val);
 485
 486         case V4L2_CID_EXPOSURE:
 487                 return mt9v032_write(client, MT9V032_TOTAL_SHUTTER_WIDTH,
 488                                      ctrl->val);
 489
 490         case V4L2_CID_TEST_PATTERN:
 491                 switch (ctrl->val) {
 492                 case 0:
 493                         data = 0;
 494                         break;
 495                 case 1:
 496                         data = MT9V032_TEST_PATTERN_GRAY_VERTICAL
 497                              | MT9V032_TEST_PATTERN_ENABLE;
 498                         break;
 499                 case 2:
 500                         data = MT9V032_TEST_PATTERN_GRAY_HORIZONTAL
 501                              | MT9V032_TEST_PATTERN_ENABLE;
 502                         break;
 503                 case 3:
 504                         data = MT9V032_TEST_PATTERN_GRAY_DIAGONAL
 505                              | MT9V032_TEST_PATTERN_ENABLE;
 506                         break;
 507                 default:
 508                         data = (ctrl->val << MT9V032_TEST_PATTERN_DATA_SHIFT)
 509                              | MT9V032_TEST_PATTERN_USE_DATA
 510                              | MT9V032_TEST_PATTERN_ENABLE
 511                              | MT9V032_TEST_PATTERN_FLIP;
 512                         break;
 513                 }
 514
 515                 return mt9v032_write(client, MT9V032_TEST_PATTERN, data);
 516         }
 517
 518         return 0;
 519 }
 520
 521 static struct v4l2_ctrl_ops mt9v032_ctrl_ops = {
 522         .s_ctrl = mt9v032_s_ctrl,
 523 };
 524
 525 static const struct v4l2_ctrl_config mt9v032_ctrls[] = {
 526         {
 527                 .ops            = &mt9v032_ctrl_ops,
 528                 .id             = V4L2_CID_TEST_PATTERN,
 529                 .type           = V4L2_CTRL_TYPE_INTEGER,
 530                 .name           = "Test pattern",
 531                 .min            = 0,
 532                 .max            = 1023,
 533                 .step           = 1,
 534                 .def            = 0,
 535                 .flags          = 0,
 536         }
 537 };
 538
 539 /* -----------------------------------------------------------------------------
 540  * V4L2 subdev core operations
 541  */
 542
 543 static int mt9v032_set_power(struct v4l2_subdev *subdev, int on)
 544 {
 545         struct mt9v032 *mt9v032 = to_mt9v032(subdev);
 546         int ret = 0;
 547
 548         mutex_lock(&mt9v032->power_lock);
 549
 550         /* If the power count is modified from 0 to != 0 or from != 0 to 0,
 551          * update the power state.
 552          */
 553         if (mt9v032->power_count == !on) {
 554                 ret = __mt9v032_set_power(mt9v032, !!on);
 555                 if (ret < 0)
 556                         goto done;
 557         }
 558
 559         /* Update the power count. */
 560         mt9v032->power_count += on ? 1 : -1;
 561         WARN_ON(mt9v032->power_count < 0);
 562
 563 done:
 564         mutex_unlock(&mt9v032->power_lock);
 565         return ret;
 566 }
 567
 568 /* -----------------------------------------------------------------------------
 569  * V4L2 subdev internal operations
 570  */
 571
 572 static int mt9v032_registered(struct v4l2_subdev *subdev)
 573 {
 574         struct i2c_client *client = v4l2_get_subdevdata(subdev);
 575         struct mt9v032 *mt9v032 = to_mt9v032(subdev);
 576         s32 data;
 577         int ret;
 578
 579         dev_info(&client->dev, "Probing MT9V032 at address 0x%02x\n",
 580                         client->addr);
 581
 582         ret = mt9v032_power_on(mt9v032);
 583         if (ret < 0) {
 584                 dev_err(&client->dev, "MT9V032 power up failed\n");
 585                 return ret;
 586         }
 587
 588         /* Read and check the sensor version */
 589         data = mt9v032_read(client, MT9V032_CHIP_VERSION);
 590         if (data != MT9V032_CHIP_ID_REV1 && data != MT9V032_CHIP_ID_REV3) {
 591                 dev_err(&client->dev, "MT9V032 not detected, wrong version "
 592                                 "0x%04x\n", data);
 593                 return -ENODEV;
 594         }
 595
 596         mt9v032_power_off(mt9v032);
 597
 598         dev_info(&client->dev, "MT9V032 detected at address 0x%02x\n",
 599                         client->addr);
 600
 601         return ret;
 602 }
 603
 604 static int mt9v032_open(struct v4l2_subdev *subdev, struct v4l2_subdev_fh *fh)
 605 {
 606         struct v4l2_mbus_framefmt *format;
 607         struct v4l2_rect *crop;
 608
 609         crop = v4l2_subdev_get_try_crop(fh, 0);
 610         crop->left = MT9V032_COLUMN_START_DEF;
 611         crop->top = MT9V032_ROW_START_DEF;
 612         crop->width = MT9V032_WINDOW_WIDTH_DEF;
 613         crop->height = MT9V032_WINDOW_HEIGHT_DEF;
 614
 615         format = v4l2_subdev_get_try_format(fh, 0);
 616         format->code = V4L2_MBUS_FMT_SGRBG10_1X10;
 617         format->width = MT9V032_WINDOW_WIDTH_DEF;
 618         format->height = MT9V032_WINDOW_HEIGHT_DEF;
 619         format->field = V4L2_FIELD_NONE;
 620         format->colorspace = V4L2_COLORSPACE_SRGB;
 621
 622         return mt9v032_set_power(subdev, 1);
 623 }
 624
 625 static int mt9v032_close(struct v4l2_subdev *subdev, struct v4l2_subdev_fh *fh)
 626 {
 627         return mt9v032_set_power(subdev, 0);
 628 }
 629
 630 static struct v4l2_subdev_core_ops mt9v032_subdev_core_ops = {
 631         .s_power        = mt9v032_set_power,
 632 };
 633
 634 static struct v4l2_subdev_video_ops mt9v032_subdev_video_ops = {
 635         .s_stream       = mt9v032_s_stream,
 636 };
 637
 638 static struct v4l2_subdev_pad_ops mt9v032_subdev_pad_ops = {
 639         .enum_mbus_code = mt9v032_enum_mbus_code,
 640         .enum_frame_size = mt9v032_enum_frame_size,
 641         .get_fmt = mt9v032_get_format,
 642         .set_fmt = mt9v032_set_format,
 643         .get_crop = mt9v032_get_crop,
 644         .set_crop = mt9v032_set_crop,
 645 };
 646
 647 static struct v4l2_subdev_ops mt9v032_subdev_ops = {
 648         .core   = &mt9v032_subdev_core_ops,
 649         .video  = &mt9v032_subdev_video_ops,
 650         .pad    = &mt9v032_subdev_pad_ops,
 651 };
 652
 653 static const struct v4l2_subdev_internal_ops mt9v032_subdev_internal_ops = {
 654         .registered = mt9v032_registered,
 655         .open = mt9v032_open,
 656         .close = mt9v032_close,
 657 };
 658
 659 /* -----------------------------------------------------------------------------
 660  * Driver initialization and probing
 661  */
 662
 663 static int mt9v032_probe(struct i2c_client *client,
 664                 const struct i2c_device_id *did)
 665 {
 666         struct mt9v032 *mt9v032;
 667         unsigned int i;
 668         int ret;
 669
 670         if (!i2c_check_functionality(client->adapter,
 671                                      I2C_FUNC_SMBUS_WORD_DATA)) {
 672                 dev_warn(&client->adapter->dev,
 673                          "I2C-Adapter doesn't support I2C_FUNC_SMBUS_WORD\n");
 674                 return -EIO;
 675         }
 676
 677         mt9v032 = kzalloc(sizeof(*mt9v032), GFP_KERNEL);
 678         if (!mt9v032)
 679                 return -ENOMEM;
 680
 681         mutex_init(&mt9v032->power_lock);
 682         mt9v032->pdata = client->dev.platform_data;
 683
 684         v4l2_ctrl_handler_init(&mt9v032->ctrls, ARRAY_SIZE(mt9v032_ctrls) + 4);
 685
 686         v4l2_ctrl_new_std(&mt9v032->ctrls, &mt9v032_ctrl_ops,
 687                           V4L2_CID_AUTOGAIN, 0, 1, 1, 1);
 688         v4l2_ctrl_new_std(&mt9v032->ctrls, &mt9v032_ctrl_ops,
 689                           V4L2_CID_GAIN, MT9V032_ANALOG_GAIN_MIN,
 690                           MT9V032_ANALOG_GAIN_MAX, 1, MT9V032_ANALOG_GAIN_DEF);
 691         v4l2_ctrl_new_std_menu(&mt9v032->ctrls, &mt9v032_ctrl_ops,
 692                                V4L2_CID_EXPOSURE_AUTO, V4L2_EXPOSURE_MANUAL, 0,
 693                                V4L2_EXPOSURE_AUTO);
 694         v4l2_ctrl_new_std(&mt9v032->ctrls, &mt9v032_ctrl_ops,
 695                           V4L2_CID_EXPOSURE, MT9V032_TOTAL_SHUTTER_WIDTH_MIN,
 696                           MT9V032_TOTAL_SHUTTER_WIDTH_MAX, 1,
 697                           MT9V032_TOTAL_SHUTTER_WIDTH_DEF);
 698
 699         for (i = 0; i < ARRAY_SIZE(mt9v032_ctrls); ++i)
 700                 v4l2_ctrl_new_custom(&mt9v032->ctrls, &mt9v032_ctrls[i], NULL);
 701
 702         mt9v032->subdev.ctrl_handler = &mt9v032->ctrls;
 703
 704         if (mt9v032->ctrls.error)
 705                 printk(KERN_INFO "%s: control initialization error %d\n",
 706                        __func__, mt9v032->ctrls.error);
 707
 708         mt9v032->crop.left = MT9V032_COLUMN_START_DEF;
 709         mt9v032->crop.top = MT9V032_ROW_START_DEF;
 710         mt9v032->crop.width = MT9V032_WINDOW_WIDTH_DEF;
 711         mt9v032->crop.height = MT9V032_WINDOW_HEIGHT_DEF;
 712
 713         mt9v032->format.code = V4L2_MBUS_FMT_SGRBG10_1X10;
 714         mt9v032->format.width = MT9V032_WINDOW_WIDTH_DEF;
 715         mt9v032->format.height = MT9V032_WINDOW_HEIGHT_DEF;
 716         mt9v032->format.field = V4L2_FIELD_NONE;
 717         mt9v032->format.colorspace = V4L2_COLORSPACE_SRGB;
 718
 719         mt9v032->aec_agc = MT9V032_AEC_ENABLE | MT9V032_AGC_ENABLE;
 720
 721         v4l2_i2c_subdev_init(&mt9v032->subdev, client, &mt9v032_subdev_ops);
 722         mt9v032->subdev.internal_ops = &mt9v032_subdev_internal_ops;
 723         mt9v032->subdev.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
 724
 725         mt9v032->pad.flags = MEDIA_PAD_FL_SOURCE;
 726         ret = media_entity_init(&mt9v032->subdev.entity, 1, &mt9v032->pad, 0);
 727         if (ret < 0)
 728                 kfree(mt9v032);
 729
 730         return ret;
 731 }
 732
 733 static int mt9v032_remove(struct i2c_client *client)
 734 {
 735         struct v4l2_subdev *subdev = i2c_get_clientdata(client);
 736         struct mt9v032 *mt9v032 = to_mt9v032(subdev);
 737
 738         v4l2_device_unregister_subdev(subdev);
 739         media_entity_cleanup(&subdev->entity);
 740         kfree(mt9v032);
 741         return 0;
 742 }
 743
 744 static const struct i2c_device_id mt9v032_id[] = {
 745         { "mt9v032", 0 },
 746         { }
 747 };
 748 MODULE_DEVICE_TABLE(i2c, mt9v032_id);
 749
 750 static struct i2c_driver mt9v032_driver = {
 751         .driver = {
 752                 .name = "mt9v032",
 753         },
 754         .probe          = mt9v032_probe,
 755         .remove         = mt9v032_remove,
 756         .id_table       = mt9v032_id,
 757 };
 758
 759 static int __init mt9v032_init(void)
 760 {
 761         return i2c_add_driver(&mt9v032_driver);
 762 }
 763
 764 static void __exit mt9v032_exit(void)
 765 {
 766         i2c_del_driver(&mt9v032_driver);
 767 }
 768
 769 module_init(mt9v032_init);
 770 module_exit(mt9v032_exit);
 771
 772 MODULE_DESCRIPTION("Aptina MT9V032 Camera driver");
 773 MODULE_AUTHOR("Laurent Pinchart <laurent.pinchart@ideasonboard.com>");
 774 MODULE_LICENSE("GPL");