drivers/media/video/mt9v022.c

   1 /*
   2  * Driver for MT9V022 CMOS Image Sensor from Micron
   3  *
   4  * Copyright (C) 2008, Guennadi Liakhovetski <kernel@pengutronix.de>
   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 version 2 as
   8  * published by the Free Software Foundation.
   9  */
  10
  11 #include <linux/videodev2.h>
  12 #include <linux/slab.h>
  13 #include <linux/i2c.h>
  14 #include <linux/delay.h>
  15 #include <linux/log2.h>
  16 #include <linux/module.h>
  17
  18 #include <media/soc_camera.h>
  19 #include <media/soc_mediabus.h>
  20 #include <media/v4l2-subdev.h>
  21 #include <media/v4l2-chip-ident.h>
  22 #include <media/v4l2-ctrls.h>
  23
  24 /*
  25  * mt9v022 i2c address 0x48, 0x4c, 0x58, 0x5c
  26  * The platform has to define ctruct i2c_board_info objects and link to them
  27  * from struct soc_camera_link
  28  */
  29
  30 static char *sensor_type;
  31 module_param(sensor_type, charp, S_IRUGO);
  32 MODULE_PARM_DESC(sensor_type, "Sensor type: \"colour\" or \"monochrome\"");
  33
  34 /* mt9v022 selected register addresses */
  35 #define MT9V022_CHIP_VERSION            0x00
  36 #define MT9V022_COLUMN_START            0x01
  37 #define MT9V022_ROW_START               0x02
  38 #define MT9V022_WINDOW_HEIGHT           0x03
  39 #define MT9V022_WINDOW_WIDTH            0x04
  40 #define MT9V022_HORIZONTAL_BLANKING     0x05
  41 #define MT9V022_VERTICAL_BLANKING       0x06
  42 #define MT9V022_CHIP_CONTROL            0x07
  43 #define MT9V022_SHUTTER_WIDTH1          0x08
  44 #define MT9V022_SHUTTER_WIDTH2          0x09
  45 #define MT9V022_SHUTTER_WIDTH_CTRL      0x0a
  46 #define MT9V022_TOTAL_SHUTTER_WIDTH     0x0b
  47 #define MT9V022_RESET                   0x0c
  48 #define MT9V022_READ_MODE               0x0d
  49 #define MT9V022_MONITOR_MODE            0x0e
  50 #define MT9V022_PIXEL_OPERATION_MODE    0x0f
  51 #define MT9V022_LED_OUT_CONTROL         0x1b
  52 #define MT9V022_ADC_MODE_CONTROL        0x1c
  53 #define MT9V022_ANALOG_GAIN             0x35
  54 #define MT9V022_BLACK_LEVEL_CALIB_CTRL  0x47
  55 #define MT9V022_PIXCLK_FV_LV            0x74
  56 #define MT9V022_DIGITAL_TEST_PATTERN    0x7f
  57 #define MT9V022_AEC_AGC_ENABLE          0xAF
  58 #define MT9V022_MAX_TOTAL_SHUTTER_WIDTH 0xBD
  59
  60 /* Progressive scan, master, defaults */
  61 #define MT9V022_CHIP_CONTROL_DEFAULT    0x188
  62
  63 #define MT9V022_MAX_WIDTH               752
  64 #define MT9V022_MAX_HEIGHT              480
  65 #define MT9V022_MIN_WIDTH               48
  66 #define MT9V022_MIN_HEIGHT              32
  67 #define MT9V022_COLUMN_SKIP             1
  68 #define MT9V022_ROW_SKIP                4
  69
  70 /* MT9V022 has only one fixed colorspace per pixelcode */
  71 struct mt9v022_datafmt {
  72         enum v4l2_mbus_pixelcode        code;
  73         enum v4l2_colorspace            colorspace;
  74 };
  75
  76 /* Find a data format by a pixel code in an array */
  77 static const struct mt9v022_datafmt *mt9v022_find_datafmt(
  78         enum v4l2_mbus_pixelcode code, const struct mt9v022_datafmt *fmt,
  79         int n)
  80 {
  81         int i;
  82         for (i = 0; i < n; i++)
  83                 if (fmt[i].code == code)
  84                         return fmt + i;
  85
  86         return NULL;
  87 }
  88
  89 static const struct mt9v022_datafmt mt9v022_colour_fmts[] = {
  90         /*
  91          * Order important: first natively supported,
  92          * second supported with a GPIO extender
  93          */
  94         {V4L2_MBUS_FMT_SBGGR10_1X10, V4L2_COLORSPACE_SRGB},
  95         {V4L2_MBUS_FMT_SBGGR8_1X8, V4L2_COLORSPACE_SRGB},
  96 };
  97
  98 static const struct mt9v022_datafmt mt9v022_monochrome_fmts[] = {
  99         /* Order important - see above */
 100         {V4L2_MBUS_FMT_Y10_1X10, V4L2_COLORSPACE_JPEG},
 101         {V4L2_MBUS_FMT_Y8_1X8, V4L2_COLORSPACE_JPEG},
 102 };
 103
 104 struct mt9v022 {
 105         struct v4l2_subdev subdev;
 106         struct v4l2_ctrl_handler hdl;
 107         struct {
 108                 /* exposure/auto-exposure cluster */
 109                 struct v4l2_ctrl *autoexposure;
 110                 struct v4l2_ctrl *exposure;
 111         };
 112         struct {
 113                 /* gain/auto-gain cluster */
 114                 struct v4l2_ctrl *autogain;
 115                 struct v4l2_ctrl *gain;
 116         };
 117         struct v4l2_rect rect;  /* Sensor window */
 118         const struct mt9v022_datafmt *fmt;
 119         const struct mt9v022_datafmt *fmts;
 120         int num_fmts;
 121         int model;      /* V4L2_IDENT_MT9V022* codes from v4l2-chip-ident.h */
 122         u16 chip_control;
 123         unsigned short y_skip_top;      /* Lines to skip at the top */
 124 };
 125
 126 static struct mt9v022 *to_mt9v022(const struct i2c_client *client)
 127 {
 128         return container_of(i2c_get_clientdata(client), struct mt9v022, subdev);
 129 }
 130
 131 static int reg_read(struct i2c_client *client, const u8 reg)
 132 {
 133         return i2c_smbus_read_word_swapped(client, reg);
 134 }
 135
 136 static int reg_write(struct i2c_client *client, const u8 reg,
 137                      const u16 data)
 138 {
 139         return i2c_smbus_write_word_swapped(client, reg, data);
 140 }
 141
 142 static int reg_set(struct i2c_client *client, const u8 reg,
 143                    const u16 data)
 144 {
 145         int ret;
 146
 147         ret = reg_read(client, reg);
 148         if (ret < 0)
 149                 return ret;
 150         return reg_write(client, reg, ret | data);
 151 }
 152
 153 static int reg_clear(struct i2c_client *client, const u8 reg,
 154                      const u16 data)
 155 {
 156         int ret;
 157
 158         ret = reg_read(client, reg);
 159         if (ret < 0)
 160                 return ret;
 161         return reg_write(client, reg, ret & ~data);
 162 }
 163
 164 static int mt9v022_init(struct i2c_client *client)
 165 {
 166         struct mt9v022 *mt9v022 = to_mt9v022(client);
 167         int ret;
 168
 169         /*
 170          * Almost the default mode: master, parallel, simultaneous, and an
 171          * undocumented bit 0x200, which is present in table 7, but not in 8,
 172          * plus snapshot mode to disable scan for now
 173          */
 174         mt9v022->chip_control |= 0x10;
 175         ret = reg_write(client, MT9V022_CHIP_CONTROL, mt9v022->chip_control);
 176         if (!ret)
 177                 ret = reg_write(client, MT9V022_READ_MODE, 0x300);
 178
 179         /* All defaults */
 180         if (!ret)
 181                 /* AEC, AGC on */
 182                 ret = reg_set(client, MT9V022_AEC_AGC_ENABLE, 0x3);
 183         if (!ret)
 184                 ret = reg_write(client, MT9V022_ANALOG_GAIN, 16);
 185         if (!ret)
 186                 ret = reg_write(client, MT9V022_TOTAL_SHUTTER_WIDTH, 480);
 187         if (!ret)
 188                 ret = reg_write(client, MT9V022_MAX_TOTAL_SHUTTER_WIDTH, 480);
 189         if (!ret)
 190                 /* default - auto */
 191                 ret = reg_clear(client, MT9V022_BLACK_LEVEL_CALIB_CTRL, 1);
 192         if (!ret)
 193                 ret = reg_write(client, MT9V022_DIGITAL_TEST_PATTERN, 0);
 194         if (!ret)
 195                 return v4l2_ctrl_handler_setup(&mt9v022->hdl);
 196
 197         return ret;
 198 }
 199
 200 static int mt9v022_s_stream(struct v4l2_subdev *sd, int enable)
 201 {
 202         struct i2c_client *client = v4l2_get_subdevdata(sd);
 203         struct mt9v022 *mt9v022 = to_mt9v022(client);
 204
 205         if (enable)
 206                 /* Switch to master "normal" mode */
 207                 mt9v022->chip_control &= ~0x10;
 208         else
 209                 /* Switch to snapshot mode */
 210                 mt9v022->chip_control |= 0x10;
 211
 212         if (reg_write(client, MT9V022_CHIP_CONTROL, mt9v022->chip_control) < 0)
 213                 return -EIO;
 214         return 0;
 215 }
 216
 217 static int mt9v022_s_crop(struct v4l2_subdev *sd, struct v4l2_crop *a)
 218 {
 219         struct i2c_client *client = v4l2_get_subdevdata(sd);
 220         struct mt9v022 *mt9v022 = to_mt9v022(client);
 221         struct v4l2_rect rect = a->c;
 222         int ret;
 223
 224         /* Bayer format - even size lengths */
 225         if (mt9v022->fmts == mt9v022_colour_fmts) {
 226                 rect.width      = ALIGN(rect.width, 2);
 227                 rect.height     = ALIGN(rect.height, 2);
 228                 /* Let the user play with the starting pixel */
 229         }
 230
 231         soc_camera_limit_side(&rect.left, &rect.width,
 232                      MT9V022_COLUMN_SKIP, MT9V022_MIN_WIDTH, MT9V022_MAX_WIDTH);
 233
 234         soc_camera_limit_side(&rect.top, &rect.height,
 235                      MT9V022_ROW_SKIP, MT9V022_MIN_HEIGHT, MT9V022_MAX_HEIGHT);
 236
 237         /* Like in example app. Contradicts the datasheet though */
 238         ret = reg_read(client, MT9V022_AEC_AGC_ENABLE);
 239         if (ret >= 0) {
 240                 if (ret & 1) /* Autoexposure */
 241                         ret = reg_write(client, MT9V022_MAX_TOTAL_SHUTTER_WIDTH,
 242                                         rect.height + mt9v022->y_skip_top + 43);
 243                 else
 244                         ret = reg_write(client, MT9V022_TOTAL_SHUTTER_WIDTH,
 245                                         rect.height + mt9v022->y_skip_top + 43);
 246         }
 247         /* Setup frame format: defaults apart from width and height */
 248         if (!ret)
 249                 ret = reg_write(client, MT9V022_COLUMN_START, rect.left);
 250         if (!ret)
 251                 ret = reg_write(client, MT9V022_ROW_START, rect.top);
 252         if (!ret)
 253                 /*
 254                  * Default 94, Phytec driver says:
 255                  * "width + horizontal blank >= 660"
 256                  */
 257                 ret = reg_write(client, MT9V022_HORIZONTAL_BLANKING,
 258                                 rect.width > 660 - 43 ? 43 :
 259                                 660 - rect.width);
 260         if (!ret)
 261                 ret = reg_write(client, MT9V022_VERTICAL_BLANKING, 45);
 262         if (!ret)
 263                 ret = reg_write(client, MT9V022_WINDOW_WIDTH, rect.width);
 264         if (!ret)
 265                 ret = reg_write(client, MT9V022_WINDOW_HEIGHT,
 266                                 rect.height + mt9v022->y_skip_top);
 267
 268         if (ret < 0)
 269                 return ret;
 270
 271         dev_dbg(&client->dev, "Frame %dx%d pixel\n", rect.width, rect.height);
 272
 273         mt9v022->rect = rect;
 274
 275         return 0;
 276 }
 277
 278 static int mt9v022_g_crop(struct v4l2_subdev *sd, struct v4l2_crop *a)
 279 {
 280         struct i2c_client *client = v4l2_get_subdevdata(sd);
 281         struct mt9v022 *mt9v022 = to_mt9v022(client);
 282
 283         a->c    = mt9v022->rect;
 284         a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 285
 286         return 0;
 287 }
 288
 289 static int mt9v022_cropcap(struct v4l2_subdev *sd, struct v4l2_cropcap *a)
 290 {
 291         a->bounds.left                  = MT9V022_COLUMN_SKIP;
 292         a->bounds.top                   = MT9V022_ROW_SKIP;
 293         a->bounds.width                 = MT9V022_MAX_WIDTH;
 294         a->bounds.height                = MT9V022_MAX_HEIGHT;
 295         a->defrect                      = a->bounds;
 296         a->type                         = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 297         a->pixelaspect.numerator        = 1;
 298         a->pixelaspect.denominator      = 1;
 299
 300         return 0;
 301 }
 302
 303 static int mt9v022_g_fmt(struct v4l2_subdev *sd,
 304                          struct v4l2_mbus_framefmt *mf)
 305 {
 306         struct i2c_client *client = v4l2_get_subdevdata(sd);
 307         struct mt9v022 *mt9v022 = to_mt9v022(client);
 308
 309         mf->width       = mt9v022->rect.width;
 310         mf->height      = mt9v022->rect.height;
 311         mf->code        = mt9v022->fmt->code;
 312         mf->colorspace  = mt9v022->fmt->colorspace;
 313         mf->field       = V4L2_FIELD_NONE;
 314
 315         return 0;
 316 }
 317
 318 static int mt9v022_s_fmt(struct v4l2_subdev *sd,
 319                          struct v4l2_mbus_framefmt *mf)
 320 {
 321         struct i2c_client *client = v4l2_get_subdevdata(sd);
 322         struct mt9v022 *mt9v022 = to_mt9v022(client);
 323         struct v4l2_crop a = {
 324                 .c = {
 325                         .left   = mt9v022->rect.left,
 326                         .top    = mt9v022->rect.top,
 327                         .width  = mf->width,
 328                         .height = mf->height,
 329                 },
 330         };
 331         int ret;
 332
 333         /*
 334          * The caller provides a supported format, as verified per call to
 335          * .try_mbus_fmt(), datawidth is from our supported format list
 336          */
 337         switch (mf->code) {
 338         case V4L2_MBUS_FMT_Y8_1X8:
 339         case V4L2_MBUS_FMT_Y10_1X10:
 340                 if (mt9v022->model != V4L2_IDENT_MT9V022IX7ATM)
 341                         return -EINVAL;
 342                 break;
 343         case V4L2_MBUS_FMT_SBGGR8_1X8:
 344         case V4L2_MBUS_FMT_SBGGR10_1X10:
 345                 if (mt9v022->model != V4L2_IDENT_MT9V022IX7ATC)
 346                         return -EINVAL;
 347                 break;
 348         default:
 349                 return -EINVAL;
 350         }
 351
 352         /* No support for scaling on this camera, just crop. */
 353         ret = mt9v022_s_crop(sd, &a);
 354         if (!ret) {
 355                 mf->width       = mt9v022->rect.width;
 356                 mf->height      = mt9v022->rect.height;
 357                 mt9v022->fmt    = mt9v022_find_datafmt(mf->code,
 358                                         mt9v022->fmts, mt9v022->num_fmts);
 359                 mf->colorspace  = mt9v022->fmt->colorspace;
 360         }
 361
 362         return ret;
 363 }
 364
 365 static int mt9v022_try_fmt(struct v4l2_subdev *sd,
 366                            struct v4l2_mbus_framefmt *mf)
 367 {
 368         struct i2c_client *client = v4l2_get_subdevdata(sd);
 369         struct mt9v022 *mt9v022 = to_mt9v022(client);
 370         const struct mt9v022_datafmt *fmt;
 371         int align = mf->code == V4L2_MBUS_FMT_SBGGR8_1X8 ||
 372                 mf->code == V4L2_MBUS_FMT_SBGGR10_1X10;
 373
 374         v4l_bound_align_image(&mf->width, MT9V022_MIN_WIDTH,
 375                 MT9V022_MAX_WIDTH, align,
 376                 &mf->height, MT9V022_MIN_HEIGHT + mt9v022->y_skip_top,
 377                 MT9V022_MAX_HEIGHT + mt9v022->y_skip_top, align, 0);
 378
 379         fmt = mt9v022_find_datafmt(mf->code, mt9v022->fmts,
 380                                    mt9v022->num_fmts);
 381         if (!fmt) {
 382                 fmt = mt9v022->fmt;
 383                 mf->code = fmt->code;
 384         }
 385
 386         mf->colorspace  = fmt->colorspace;
 387
 388         return 0;
 389 }
 390
 391 static int mt9v022_g_chip_ident(struct v4l2_subdev *sd,
 392                                 struct v4l2_dbg_chip_ident *id)
 393 {
 394         struct i2c_client *client = v4l2_get_subdevdata(sd);
 395         struct mt9v022 *mt9v022 = to_mt9v022(client);
 396
 397         if (id->match.type != V4L2_CHIP_MATCH_I2C_ADDR)
 398                 return -EINVAL;
 399
 400         if (id->match.addr != client->addr)
 401                 return -ENODEV;
 402
 403         id->ident       = mt9v022->model;
 404         id->revision    = 0;
 405
 406         return 0;
 407 }
 408
 409 #ifdef CONFIG_VIDEO_ADV_DEBUG
 410 static int mt9v022_g_register(struct v4l2_subdev *sd,
 411                               struct v4l2_dbg_register *reg)
 412 {
 413         struct i2c_client *client = v4l2_get_subdevdata(sd);
 414
 415         if (reg->match.type != V4L2_CHIP_MATCH_I2C_ADDR || reg->reg > 0xff)
 416                 return -EINVAL;
 417
 418         if (reg->match.addr != client->addr)
 419                 return -ENODEV;
 420
 421         reg->size = 2;
 422         reg->val = reg_read(client, reg->reg);
 423
 424         if (reg->val > 0xffff)
 425                 return -EIO;
 426
 427         return 0;
 428 }
 429
 430 static int mt9v022_s_register(struct v4l2_subdev *sd,
 431                               struct v4l2_dbg_register *reg)
 432 {
 433         struct i2c_client *client = v4l2_get_subdevdata(sd);
 434
 435         if (reg->match.type != V4L2_CHIP_MATCH_I2C_ADDR || reg->reg > 0xff)
 436                 return -EINVAL;
 437
 438         if (reg->match.addr != client->addr)
 439                 return -ENODEV;
 440
 441         if (reg_write(client, reg->reg, reg->val) < 0)
 442                 return -EIO;
 443
 444         return 0;
 445 }
 446 #endif
 447
 448 static int mt9v022_g_volatile_ctrl(struct v4l2_ctrl *ctrl)
 449 {
 450         struct mt9v022 *mt9v022 = container_of(ctrl->handler,
 451                                                struct mt9v022, hdl);
 452         struct v4l2_subdev *sd = &mt9v022->subdev;
 453         struct i2c_client *client = v4l2_get_subdevdata(sd);
 454         struct v4l2_ctrl *gain = mt9v022->gain;
 455         struct v4l2_ctrl *exp = mt9v022->exposure;
 456         unsigned long range;
 457         int data;
 458
 459         switch (ctrl->id) {
 460         case V4L2_CID_AUTOGAIN:
 461                 data = reg_read(client, MT9V022_ANALOG_GAIN);
 462                 if (data < 0)
 463                         return -EIO;
 464
 465                 range = gain->maximum - gain->minimum;
 466                 gain->val = ((data - 16) * range + 24) / 48 + gain->minimum;
 467                 return 0;
 468         case V4L2_CID_EXPOSURE_AUTO:
 469                 data = reg_read(client, MT9V022_TOTAL_SHUTTER_WIDTH);
 470                 if (data < 0)
 471                         return -EIO;
 472
 473                 range = exp->maximum - exp->minimum;
 474                 exp->val = ((data - 1) * range + 239) / 479 + exp->minimum;
 475                 return 0;
 476         }
 477         return -EINVAL;
 478 }
 479
 480 static int mt9v022_s_ctrl(struct v4l2_ctrl *ctrl)
 481 {
 482         struct mt9v022 *mt9v022 = container_of(ctrl->handler,
 483                                                struct mt9v022, hdl);
 484         struct v4l2_subdev *sd = &mt9v022->subdev;
 485         struct i2c_client *client = v4l2_get_subdevdata(sd);
 486         int data;
 487
 488         switch (ctrl->id) {
 489         case V4L2_CID_VFLIP:
 490                 if (ctrl->val)
 491                         data = reg_set(client, MT9V022_READ_MODE, 0x10);
 492                 else
 493                         data = reg_clear(client, MT9V022_READ_MODE, 0x10);
 494                 if (data < 0)
 495                         return -EIO;
 496                 return 0;
 497         case V4L2_CID_HFLIP:
 498                 if (ctrl->val)
 499                         data = reg_set(client, MT9V022_READ_MODE, 0x20);
 500                 else
 501                         data = reg_clear(client, MT9V022_READ_MODE, 0x20);
 502                 if (data < 0)
 503                         return -EIO;
 504                 return 0;
 505         case V4L2_CID_AUTOGAIN:
 506                 if (ctrl->val) {
 507                         if (reg_set(client, MT9V022_AEC_AGC_ENABLE, 0x2) < 0)
 508                                 return -EIO;
 509                 } else {
 510                         struct v4l2_ctrl *gain = mt9v022->gain;
 511                         /* mt9v022 has minimum == default */
 512                         unsigned long range = gain->maximum - gain->minimum;
 513                         /* Valid values 16 to 64, 32 to 64 must be even. */
 514                         unsigned long gain_val = ((gain->val - gain->minimum) *
 515                                               48 + range / 2) / range + 16;
 516
 517                         if (gain_val >= 32)
 518                                 gain_val &= ~1;
 519
 520                         /*
 521                          * The user wants to set gain manually, hope, she
 522                          * knows, what she's doing... Switch AGC off.
 523                          */
 524                         if (reg_clear(client, MT9V022_AEC_AGC_ENABLE, 0x2) < 0)
 525                                 return -EIO;
 526
 527                         dev_dbg(&client->dev, "Setting gain from %d to %lu\n",
 528                                 reg_read(client, MT9V022_ANALOG_GAIN), gain_val);
 529                         if (reg_write(client, MT9V022_ANALOG_GAIN, gain_val) < 0)
 530                                 return -EIO;
 531                 }
 532                 return 0;
 533         case V4L2_CID_EXPOSURE_AUTO:
 534                 if (ctrl->val == V4L2_EXPOSURE_AUTO) {
 535                         data = reg_set(client, MT9V022_AEC_AGC_ENABLE, 0x1);
 536                 } else {
 537                         struct v4l2_ctrl *exp = mt9v022->exposure;
 538                         unsigned long range = exp->maximum - exp->minimum;
 539                         unsigned long shutter = ((exp->val - exp->minimum) *
 540                                         479 + range / 2) / range + 1;
 541
 542                         /*
 543                          * The user wants to set shutter width manually, hope,
 544                          * she knows, what she's doing... Switch AEC off.
 545                          */
 546                         data = reg_clear(client, MT9V022_AEC_AGC_ENABLE, 0x1);
 547                         if (data < 0)
 548                                 return -EIO;
 549                         dev_dbg(&client->dev, "Shutter width from %d to %lu\n",
 550                                         reg_read(client, MT9V022_TOTAL_SHUTTER_WIDTH),
 551                                         shutter);
 552                         if (reg_write(client, MT9V022_TOTAL_SHUTTER_WIDTH,
 553                                                 shutter) < 0)
 554                                 return -EIO;
 555                 }
 556                 return 0;
 557         }
 558         return -EINVAL;
 559 }
 560
 561 /*
 562  * Interface active, can use i2c. If it fails, it can indeed mean, that
 563  * this wasn't our capture interface, so, we wait for the right one
 564  */
 565 static int mt9v022_video_probe(struct i2c_client *client)
 566 {
 567         struct mt9v022 *mt9v022 = to_mt9v022(client);
 568         struct soc_camera_link *icl = soc_camera_i2c_to_link(client);
 569         s32 data;
 570         int ret;
 571         unsigned long flags;
 572
 573         /* Read out the chip version register */
 574         data = reg_read(client, MT9V022_CHIP_VERSION);
 575
 576         /* must be 0x1311 or 0x1313 */
 577         if (data != 0x1311 && data != 0x1313) {
 578                 ret = -ENODEV;
 579                 dev_info(&client->dev, "No MT9V022 found, ID register 0x%x\n",
 580                          data);
 581                 goto ei2c;
 582         }
 583
 584         /* Soft reset */
 585         ret = reg_write(client, MT9V022_RESET, 1);
 586         if (ret < 0)
 587                 goto ei2c;
 588         /* 15 clock cycles */
 589         udelay(200);
 590         if (reg_read(client, MT9V022_RESET)) {
 591                 dev_err(&client->dev, "Resetting MT9V022 failed!\n");
 592                 if (ret > 0)
 593                         ret = -EIO;
 594                 goto ei2c;
 595         }
 596
 597         /* Set monochrome or colour sensor type */
 598         if (sensor_type && (!strcmp("colour", sensor_type) ||
 599                             !strcmp("color", sensor_type))) {
 600                 ret = reg_write(client, MT9V022_PIXEL_OPERATION_MODE, 4 | 0x11);
 601                 mt9v022->model = V4L2_IDENT_MT9V022IX7ATC;
 602                 mt9v022->fmts = mt9v022_colour_fmts;
 603         } else {
 604                 ret = reg_write(client, MT9V022_PIXEL_OPERATION_MODE, 0x11);
 605                 mt9v022->model = V4L2_IDENT_MT9V022IX7ATM;
 606                 mt9v022->fmts = mt9v022_monochrome_fmts;
 607         }
 608
 609         if (ret < 0)
 610                 goto ei2c;
 611
 612         mt9v022->num_fmts = 0;
 613
 614         /*
 615          * This is a 10bit sensor, so by default we only allow 10bit.
 616          * The platform may support different bus widths due to
 617          * different routing of the data lines.
 618          */
 619         if (icl->query_bus_param)
 620                 flags = icl->query_bus_param(icl);
 621         else
 622                 flags = SOCAM_DATAWIDTH_10;
 623
 624         if (flags & SOCAM_DATAWIDTH_10)
 625                 mt9v022->num_fmts++;
 626         else
 627                 mt9v022->fmts++;
 628
 629         if (flags & SOCAM_DATAWIDTH_8)
 630                 mt9v022->num_fmts++;
 631
 632         mt9v022->fmt = &mt9v022->fmts[0];
 633
 634         dev_info(&client->dev, "Detected a MT9V022 chip ID %x, %s sensor\n",
 635                  data, mt9v022->model == V4L2_IDENT_MT9V022IX7ATM ?
 636                  "monochrome" : "colour");
 637
 638         ret = mt9v022_init(client);
 639         if (ret < 0)
 640                 dev_err(&client->dev, "Failed to initialise the camera\n");
 641
 642 ei2c:
 643         return ret;
 644 }
 645
 646 static int mt9v022_g_skip_top_lines(struct v4l2_subdev *sd, u32 *lines)
 647 {
 648         struct i2c_client *client = v4l2_get_subdevdata(sd);
 649         struct mt9v022 *mt9v022 = to_mt9v022(client);
 650
 651         *lines = mt9v022->y_skip_top;
 652
 653         return 0;
 654 }
 655
 656 static const struct v4l2_ctrl_ops mt9v022_ctrl_ops = {
 657         .g_volatile_ctrl = mt9v022_g_volatile_ctrl,
 658         .s_ctrl = mt9v022_s_ctrl,
 659 };
 660
 661 static struct v4l2_subdev_core_ops mt9v022_subdev_core_ops = {
 662         .g_chip_ident   = mt9v022_g_chip_ident,
 663 #ifdef CONFIG_VIDEO_ADV_DEBUG
 664         .g_register     = mt9v022_g_register,
 665         .s_register     = mt9v022_s_register,
 666 #endif
 667 };
 668
 669 static int mt9v022_enum_fmt(struct v4l2_subdev *sd, unsigned int index,
 670                             enum v4l2_mbus_pixelcode *code)
 671 {
 672         struct i2c_client *client = v4l2_get_subdevdata(sd);
 673         struct mt9v022 *mt9v022 = to_mt9v022(client);
 674
 675         if (index >= mt9v022->num_fmts)
 676                 return -EINVAL;
 677
 678         *code = mt9v022->fmts[index].code;
 679         return 0;
 680 }
 681
 682 static int mt9v022_g_mbus_config(struct v4l2_subdev *sd,
 683                                 struct v4l2_mbus_config *cfg)
 684 {
 685         struct i2c_client *client = v4l2_get_subdevdata(sd);
 686         struct soc_camera_link *icl = soc_camera_i2c_to_link(client);
 687
 688         cfg->flags = V4L2_MBUS_MASTER | V4L2_MBUS_SLAVE |
 689                 V4L2_MBUS_PCLK_SAMPLE_RISING | V4L2_MBUS_PCLK_SAMPLE_FALLING |
 690                 V4L2_MBUS_HSYNC_ACTIVE_HIGH | V4L2_MBUS_HSYNC_ACTIVE_LOW |
 691                 V4L2_MBUS_VSYNC_ACTIVE_HIGH | V4L2_MBUS_VSYNC_ACTIVE_LOW |
 692                 V4L2_MBUS_DATA_ACTIVE_HIGH;
 693         cfg->type = V4L2_MBUS_PARALLEL;
 694         cfg->flags = soc_camera_apply_board_flags(icl, cfg);
 695
 696         return 0;
 697 }
 698
 699 static int mt9v022_s_mbus_config(struct v4l2_subdev *sd,
 700                                  const struct v4l2_mbus_config *cfg)
 701 {
 702         struct i2c_client *client = v4l2_get_subdevdata(sd);
 703         struct soc_camera_link *icl = soc_camera_i2c_to_link(client);
 704         struct mt9v022 *mt9v022 = to_mt9v022(client);
 705         unsigned long flags = soc_camera_apply_board_flags(icl, cfg);
 706         unsigned int bps = soc_mbus_get_fmtdesc(mt9v022->fmt->code)->bits_per_sample;
 707         int ret;
 708         u16 pixclk = 0;
 709
 710         if (icl->set_bus_param) {
 711                 ret = icl->set_bus_param(icl, 1 << (bps - 1));
 712                 if (ret)
 713                         return ret;
 714         } else if (bps != 10) {
 715                 /*
 716                  * Without board specific bus width settings we only support the
 717                  * sensors native bus width
 718                  */
 719                 return -EINVAL;
 720         }
 721
 722         if (flags & V4L2_MBUS_PCLK_SAMPLE_FALLING)
 723                 pixclk |= 0x10;
 724
 725         if (!(flags & V4L2_MBUS_HSYNC_ACTIVE_HIGH))
 726                 pixclk |= 0x1;
 727
 728         if (!(flags & V4L2_MBUS_VSYNC_ACTIVE_HIGH))
 729                 pixclk |= 0x2;
 730
 731         ret = reg_write(client, MT9V022_PIXCLK_FV_LV, pixclk);
 732         if (ret < 0)
 733                 return ret;
 734
 735         if (!(flags & V4L2_MBUS_MASTER))
 736                 mt9v022->chip_control &= ~0x8;
 737
 738         ret = reg_write(client, MT9V022_CHIP_CONTROL, mt9v022->chip_control);
 739         if (ret < 0)
 740                 return ret;
 741
 742         dev_dbg(&client->dev, "Calculated pixclk 0x%x, chip control 0x%x\n",
 743                 pixclk, mt9v022->chip_control);
 744
 745         return 0;
 746 }
 747
 748 static struct v4l2_subdev_video_ops mt9v022_subdev_video_ops = {
 749         .s_stream       = mt9v022_s_stream,
 750         .s_mbus_fmt     = mt9v022_s_fmt,
 751         .g_mbus_fmt     = mt9v022_g_fmt,
 752         .try_mbus_fmt   = mt9v022_try_fmt,
 753         .s_crop         = mt9v022_s_crop,
 754         .g_crop         = mt9v022_g_crop,
 755         .cropcap        = mt9v022_cropcap,
 756         .enum_mbus_fmt  = mt9v022_enum_fmt,
 757         .g_mbus_config  = mt9v022_g_mbus_config,
 758         .s_mbus_config  = mt9v022_s_mbus_config,
 759 };
 760
 761 static struct v4l2_subdev_sensor_ops mt9v022_subdev_sensor_ops = {
 762         .g_skip_top_lines       = mt9v022_g_skip_top_lines,
 763 };
 764
 765 static struct v4l2_subdev_ops mt9v022_subdev_ops = {
 766         .core   = &mt9v022_subdev_core_ops,
 767         .video  = &mt9v022_subdev_video_ops,
 768         .sensor = &mt9v022_subdev_sensor_ops,
 769 };
 770
 771 static int mt9v022_probe(struct i2c_client *client,
 772                          const struct i2c_device_id *did)
 773 {
 774         struct mt9v022 *mt9v022;
 775         struct soc_camera_link *icl = soc_camera_i2c_to_link(client);
 776         struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent);
 777         int ret;
 778
 779         if (!icl) {
 780                 dev_err(&client->dev, "MT9V022 driver needs platform data\n");
 781                 return -EINVAL;
 782         }
 783
 784         if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_WORD_DATA)) {
 785                 dev_warn(&adapter->dev,
 786                          "I2C-Adapter doesn't support I2C_FUNC_SMBUS_WORD\n");
 787                 return -EIO;
 788         }
 789
 790         mt9v022 = kzalloc(sizeof(struct mt9v022), GFP_KERNEL);
 791         if (!mt9v022)
 792                 return -ENOMEM;
 793
 794         v4l2_i2c_subdev_init(&mt9v022->subdev, client, &mt9v022_subdev_ops);
 795         v4l2_ctrl_handler_init(&mt9v022->hdl, 6);
 796         v4l2_ctrl_new_std(&mt9v022->hdl, &mt9v022_ctrl_ops,
 797                         V4L2_CID_VFLIP, 0, 1, 1, 0);
 798         v4l2_ctrl_new_std(&mt9v022->hdl, &mt9v022_ctrl_ops,
 799                         V4L2_CID_HFLIP, 0, 1, 1, 0);
 800         mt9v022->autogain = v4l2_ctrl_new_std(&mt9v022->hdl, &mt9v022_ctrl_ops,
 801                         V4L2_CID_AUTOGAIN, 0, 1, 1, 1);
 802         mt9v022->gain = v4l2_ctrl_new_std(&mt9v022->hdl, &mt9v022_ctrl_ops,
 803                         V4L2_CID_GAIN, 0, 127, 1, 64);
 804
 805         /*
 806          * Simulated autoexposure. If enabled, we calculate shutter width
 807          * ourselves in the driver based on vertical blanking and frame width
 808          */
 809         mt9v022->autoexposure = v4l2_ctrl_new_std_menu(&mt9v022->hdl,
 810                         &mt9v022_ctrl_ops, V4L2_CID_EXPOSURE_AUTO, 1, 0,
 811                         V4L2_EXPOSURE_AUTO);
 812         mt9v022->exposure = v4l2_ctrl_new_std(&mt9v022->hdl, &mt9v022_ctrl_ops,
 813                         V4L2_CID_EXPOSURE, 1, 255, 1, 255);
 814
 815         mt9v022->subdev.ctrl_handler = &mt9v022->hdl;
 816         if (mt9v022->hdl.error) {
 817                 int err = mt9v022->hdl.error;
 818
 819                 kfree(mt9v022);
 820                 return err;
 821         }
 822         v4l2_ctrl_auto_cluster(2, &mt9v022->autoexposure,
 823                                 V4L2_EXPOSURE_MANUAL, true);
 824         v4l2_ctrl_auto_cluster(2, &mt9v022->autogain, 0, true);
 825
 826         mt9v022->chip_control = MT9V022_CHIP_CONTROL_DEFAULT;
 827
 828         /*
 829          * MT9V022 _really_ corrupts the first read out line.
 830          * TODO: verify on i.MX31
 831          */
 832         mt9v022->y_skip_top     = 1;
 833         mt9v022->rect.left      = MT9V022_COLUMN_SKIP;
 834         mt9v022->rect.top       = MT9V022_ROW_SKIP;
 835         mt9v022->rect.width     = MT9V022_MAX_WIDTH;
 836         mt9v022->rect.height    = MT9V022_MAX_HEIGHT;
 837
 838         ret = mt9v022_video_probe(client);
 839         if (ret) {
 840                 v4l2_ctrl_handler_free(&mt9v022->hdl);
 841                 kfree(mt9v022);
 842         }
 843
 844         return ret;
 845 }
 846
 847 static int mt9v022_remove(struct i2c_client *client)
 848 {
 849         struct mt9v022 *mt9v022 = to_mt9v022(client);
 850         struct soc_camera_link *icl = soc_camera_i2c_to_link(client);
 851
 852         v4l2_device_unregister_subdev(&mt9v022->subdev);
 853         if (icl->free_bus)
 854                 icl->free_bus(icl);
 855         v4l2_ctrl_handler_free(&mt9v022->hdl);
 856         kfree(mt9v022);
 857
 858         return 0;
 859 }
 860 static const struct i2c_device_id mt9v022_id[] = {
 861         { "mt9v022", 0 },
 862         { }
 863 };
 864 MODULE_DEVICE_TABLE(i2c, mt9v022_id);
 865
 866 static struct i2c_driver mt9v022_i2c_driver = {
 867         .driver = {
 868                 .name = "mt9v022",
 869         },
 870         .probe          = mt9v022_probe,
 871         .remove         = mt9v022_remove,
 872         .id_table       = mt9v022_id,
 873 };
 874
 875 module_i2c_driver(mt9v022_i2c_driver);
 876
 877 MODULE_DESCRIPTION("Micron MT9V022 Camera driver");
 878 MODULE_AUTHOR("Guennadi Liakhovetski <kernel@pengutronix.de>");
 879 MODULE_LICENSE("GPL");