drivers/media/video/mt9m111.c

   1 /*
   2  * Driver for MT9M111/MT9M112/MT9M131 CMOS Image Sensor from Micron/Aptina
   3  *
   4  * Copyright (C) 2008, Robert Jarzmik <robert.jarzmik@free.fr>
   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 #include <linux/videodev2.h>
  11 #include <linux/slab.h>
  12 #include <linux/i2c.h>
  13 #include <linux/log2.h>
  14 #include <linux/gpio.h>
  15 #include <linux/delay.h>
  16
  17 #include <media/soc_camera.h>
  18 #include <media/soc_mediabus.h>
  19 #include <media/v4l2-common.h>
  20 #include <media/v4l2-ctrls.h>
  21 #include <media/v4l2-chip-ident.h>
  22
  23 /*
  24  * MT9M111, MT9M112 and MT9M131:
  25  * i2c address is 0x48 or 0x5d (depending on SADDR pin)
  26  * The platform has to define i2c_board_info and call i2c_register_board_info()
  27  */
  28
  29 /*
  30  * Sensor core register addresses (0x000..0x0ff)
  31  */
  32 #define MT9M111_CHIP_VERSION            0x000
  33 #define MT9M111_ROW_START               0x001
  34 #define MT9M111_COLUMN_START            0x002
  35 #define MT9M111_WINDOW_HEIGHT           0x003
  36 #define MT9M111_WINDOW_WIDTH            0x004
  37 #define MT9M111_HORIZONTAL_BLANKING_B   0x005
  38 #define MT9M111_VERTICAL_BLANKING_B     0x006
  39 #define MT9M111_HORIZONTAL_BLANKING_A   0x007
  40 #define MT9M111_VERTICAL_BLANKING_A     0x008
  41 #define MT9M111_SHUTTER_WIDTH           0x009
  42 #define MT9M111_ROW_SPEED               0x00a
  43 #define MT9M111_EXTRA_DELAY             0x00b
  44 #define MT9M111_SHUTTER_DELAY           0x00c
  45 #define MT9M111_RESET                   0x00d
  46 #define MT9M111_READ_MODE_B             0x020
  47 #define MT9M111_READ_MODE_A             0x021
  48 #define MT9M111_FLASH_CONTROL           0x023
  49 #define MT9M111_GREEN1_GAIN             0x02b
  50 #define MT9M111_BLUE_GAIN               0x02c
  51 #define MT9M111_RED_GAIN                0x02d
  52 #define MT9M111_GREEN2_GAIN             0x02e
  53 #define MT9M111_GLOBAL_GAIN             0x02f
  54 #define MT9M111_CONTEXT_CONTROL         0x0c8
  55 #define MT9M111_PAGE_MAP                0x0f0
  56 #define MT9M111_BYTE_WISE_ADDR          0x0f1
  57
  58 #define MT9M111_RESET_SYNC_CHANGES      (1 << 15)
  59 #define MT9M111_RESET_RESTART_BAD_FRAME (1 << 9)
  60 #define MT9M111_RESET_SHOW_BAD_FRAMES   (1 << 8)
  61 #define MT9M111_RESET_RESET_SOC         (1 << 5)
  62 #define MT9M111_RESET_OUTPUT_DISABLE    (1 << 4)
  63 #define MT9M111_RESET_CHIP_ENABLE       (1 << 3)
  64 #define MT9M111_RESET_ANALOG_STANDBY    (1 << 2)
  65 #define MT9M111_RESET_RESTART_FRAME     (1 << 1)
  66 #define MT9M111_RESET_RESET_MODE        (1 << 0)
  67
  68 #define MT9M111_RM_FULL_POWER_RD        (0 << 10)
  69 #define MT9M111_RM_LOW_POWER_RD         (1 << 10)
  70 #define MT9M111_RM_COL_SKIP_4X          (1 << 5)
  71 #define MT9M111_RM_ROW_SKIP_4X          (1 << 4)
  72 #define MT9M111_RM_COL_SKIP_2X          (1 << 3)
  73 #define MT9M111_RM_ROW_SKIP_2X          (1 << 2)
  74 #define MT9M111_RMB_MIRROR_COLS         (1 << 1)
  75 #define MT9M111_RMB_MIRROR_ROWS         (1 << 0)
  76 #define MT9M111_CTXT_CTRL_RESTART       (1 << 15)
  77 #define MT9M111_CTXT_CTRL_DEFECTCOR_B   (1 << 12)
  78 #define MT9M111_CTXT_CTRL_RESIZE_B      (1 << 10)
  79 #define MT9M111_CTXT_CTRL_CTRL2_B       (1 << 9)
  80 #define MT9M111_CTXT_CTRL_GAMMA_B       (1 << 8)
  81 #define MT9M111_CTXT_CTRL_XENON_EN      (1 << 7)
  82 #define MT9M111_CTXT_CTRL_READ_MODE_B   (1 << 3)
  83 #define MT9M111_CTXT_CTRL_LED_FLASH_EN  (1 << 2)
  84 #define MT9M111_CTXT_CTRL_VBLANK_SEL_B  (1 << 1)
  85 #define MT9M111_CTXT_CTRL_HBLANK_SEL_B  (1 << 0)
  86
  87 /*
  88  * Colorpipe register addresses (0x100..0x1ff)
  89  */
  90 #define MT9M111_OPER_MODE_CTRL          0x106
  91 #define MT9M111_OUTPUT_FORMAT_CTRL      0x108
  92 #define MT9M111_REDUCER_XZOOM_B         0x1a0
  93 #define MT9M111_REDUCER_XSIZE_B         0x1a1
  94 #define MT9M111_REDUCER_YZOOM_B         0x1a3
  95 #define MT9M111_REDUCER_YSIZE_B         0x1a4
  96 #define MT9M111_REDUCER_XZOOM_A         0x1a6
  97 #define MT9M111_REDUCER_XSIZE_A         0x1a7
  98 #define MT9M111_REDUCER_YZOOM_A         0x1a9
  99 #define MT9M111_REDUCER_YSIZE_A         0x1aa
 100
 101 #define MT9M111_OUTPUT_FORMAT_CTRL2_A   0x13a
 102 #define MT9M111_OUTPUT_FORMAT_CTRL2_B   0x19b
 103
 104 #define MT9M111_OPMODE_AUTOEXPO_EN      (1 << 14)
 105 #define MT9M111_OPMODE_AUTOWHITEBAL_EN  (1 << 1)
 106 #define MT9M111_OUTFMT_FLIP_BAYER_COL   (1 << 9)
 107 #define MT9M111_OUTFMT_FLIP_BAYER_ROW   (1 << 8)
 108 #define MT9M111_OUTFMT_PROCESSED_BAYER  (1 << 14)
 109 #define MT9M111_OUTFMT_BYPASS_IFP       (1 << 10)
 110 #define MT9M111_OUTFMT_INV_PIX_CLOCK    (1 << 9)
 111 #define MT9M111_OUTFMT_RGB              (1 << 8)
 112 #define MT9M111_OUTFMT_RGB565           (0 << 6)
 113 #define MT9M111_OUTFMT_RGB555           (1 << 6)
 114 #define MT9M111_OUTFMT_RGB444x          (2 << 6)
 115 #define MT9M111_OUTFMT_RGBx444          (3 << 6)
 116 #define MT9M111_OUTFMT_TST_RAMP_OFF     (0 << 4)
 117 #define MT9M111_OUTFMT_TST_RAMP_COL     (1 << 4)
 118 #define MT9M111_OUTFMT_TST_RAMP_ROW     (2 << 4)
 119 #define MT9M111_OUTFMT_TST_RAMP_FRAME   (3 << 4)
 120 #define MT9M111_OUTFMT_SHIFT_3_UP       (1 << 3)
 121 #define MT9M111_OUTFMT_AVG_CHROMA       (1 << 2)
 122 #define MT9M111_OUTFMT_SWAP_YCbCr_C_Y_RGB_EVEN  (1 << 1)
 123 #define MT9M111_OUTFMT_SWAP_YCbCr_Cb_Cr_RGB_R_B (1 << 0)
 124
 125 /*
 126  * Camera control register addresses (0x200..0x2ff not implemented)
 127  */
 128
 129 #define reg_read(reg) mt9m111_reg_read(client, MT9M111_##reg)
 130 #define reg_write(reg, val) mt9m111_reg_write(client, MT9M111_##reg, (val))
 131 #define reg_set(reg, val) mt9m111_reg_set(client, MT9M111_##reg, (val))
 132 #define reg_clear(reg, val) mt9m111_reg_clear(client, MT9M111_##reg, (val))
 133 #define reg_mask(reg, val, mask) mt9m111_reg_mask(client, MT9M111_##reg, \
 134                 (val), (mask))
 135
 136 #define MT9M111_MIN_DARK_ROWS   8
 137 #define MT9M111_MIN_DARK_COLS   26
 138 #define MT9M111_MAX_HEIGHT      1024
 139 #define MT9M111_MAX_WIDTH       1280
 140
 141 /* MT9M111 has only one fixed colorspace per pixelcode */
 142 struct mt9m111_datafmt {
 143         enum v4l2_mbus_pixelcode        code;
 144         enum v4l2_colorspace            colorspace;
 145 };
 146
 147 /* Find a data format by a pixel code in an array */
 148 static const struct mt9m111_datafmt *mt9m111_find_datafmt(
 149         enum v4l2_mbus_pixelcode code, const struct mt9m111_datafmt *fmt,
 150         int n)
 151 {
 152         int i;
 153         for (i = 0; i < n; i++)
 154                 if (fmt[i].code == code)
 155                         return fmt + i;
 156
 157         return NULL;
 158 }
 159
 160 static const struct mt9m111_datafmt mt9m111_colour_fmts[] = {
 161         {V4L2_MBUS_FMT_YUYV8_2X8, V4L2_COLORSPACE_JPEG},
 162         {V4L2_MBUS_FMT_YVYU8_2X8, V4L2_COLORSPACE_JPEG},
 163         {V4L2_MBUS_FMT_UYVY8_2X8, V4L2_COLORSPACE_JPEG},
 164         {V4L2_MBUS_FMT_VYUY8_2X8, V4L2_COLORSPACE_JPEG},
 165         {V4L2_MBUS_FMT_RGB555_2X8_PADHI_LE, V4L2_COLORSPACE_SRGB},
 166         {V4L2_MBUS_FMT_RGB555_2X8_PADHI_BE, V4L2_COLORSPACE_SRGB},
 167         {V4L2_MBUS_FMT_RGB565_2X8_LE, V4L2_COLORSPACE_SRGB},
 168         {V4L2_MBUS_FMT_RGB565_2X8_BE, V4L2_COLORSPACE_SRGB},
 169         {V4L2_MBUS_FMT_BGR565_2X8_LE, V4L2_COLORSPACE_SRGB},
 170         {V4L2_MBUS_FMT_BGR565_2X8_BE, V4L2_COLORSPACE_SRGB},
 171         {V4L2_MBUS_FMT_SBGGR8_1X8, V4L2_COLORSPACE_SRGB},
 172         {V4L2_MBUS_FMT_SBGGR10_2X8_PADHI_LE, V4L2_COLORSPACE_SRGB},
 173 };
 174
 175 enum mt9m111_context {
 176         HIGHPOWER = 0,
 177         LOWPOWER,
 178 };
 179
 180 struct mt9m111 {
 181         struct v4l2_subdev subdev;
 182         struct v4l2_ctrl_handler hdl;
 183         struct v4l2_ctrl *gain;
 184         int model;      /* V4L2_IDENT_MT9M111 or V4L2_IDENT_MT9M112 code
 185                          * from v4l2-chip-ident.h */
 186         enum mt9m111_context context;
 187         struct v4l2_rect rect;
 188         struct mutex power_lock; /* lock to protect power_count */
 189         int power_count;
 190         const struct mt9m111_datafmt *fmt;
 191         int lastpage;   /* PageMap cache value */
 192         unsigned char datawidth;
 193         unsigned int powered:1;
 194 };
 195
 196 static struct mt9m111 *to_mt9m111(const struct i2c_client *client)
 197 {
 198         return container_of(i2c_get_clientdata(client), struct mt9m111, subdev);
 199 }
 200
 201 static int reg_page_map_set(struct i2c_client *client, const u16 reg)
 202 {
 203         int ret;
 204         u16 page;
 205         struct mt9m111 *mt9m111 = to_mt9m111(client);
 206
 207         page = (reg >> 8);
 208         if (page == mt9m111->lastpage)
 209                 return 0;
 210         if (page > 2)
 211                 return -EINVAL;
 212
 213         ret = i2c_smbus_write_word_data(client, MT9M111_PAGE_MAP, swab16(page));
 214         if (!ret)
 215                 mt9m111->lastpage = page;
 216         return ret;
 217 }
 218
 219 static int mt9m111_reg_read(struct i2c_client *client, const u16 reg)
 220 {
 221         int ret;
 222
 223         ret = reg_page_map_set(client, reg);
 224         if (!ret)
 225                 ret = swab16(i2c_smbus_read_word_data(client, reg & 0xff));
 226
 227         dev_dbg(&client->dev, "read  reg.%03x -> %04x\n", reg, ret);
 228         return ret;
 229 }
 230
 231 static int mt9m111_reg_write(struct i2c_client *client, const u16 reg,
 232                              const u16 data)
 233 {
 234         int ret;
 235
 236         ret = reg_page_map_set(client, reg);
 237         if (!ret)
 238                 ret = i2c_smbus_write_word_data(client, reg & 0xff,
 239                                                 swab16(data));
 240         dev_dbg(&client->dev, "write reg.%03x = %04x -> %d\n", reg, data, ret);
 241         return ret;
 242 }
 243
 244 static int mt9m111_reg_set(struct i2c_client *client, const u16 reg,
 245                            const u16 data)
 246 {
 247         int ret;
 248
 249         ret = mt9m111_reg_read(client, reg);
 250         if (ret >= 0)
 251                 ret = mt9m111_reg_write(client, reg, ret | data);
 252         return ret;
 253 }
 254
 255 static int mt9m111_reg_clear(struct i2c_client *client, const u16 reg,
 256                              const u16 data)
 257 {
 258         int ret;
 259
 260         ret = mt9m111_reg_read(client, reg);
 261         if (ret >= 0)
 262                 ret = mt9m111_reg_write(client, reg, ret & ~data);
 263         return ret;
 264 }
 265
 266 static int mt9m111_reg_mask(struct i2c_client *client, const u16 reg,
 267                             const u16 data, const u16 mask)
 268 {
 269         int ret;
 270
 271         ret = mt9m111_reg_read(client, reg);
 272         if (ret >= 0)
 273                 ret = mt9m111_reg_write(client, reg, (ret & ~mask) | data);
 274         return ret;
 275 }
 276
 277 static int mt9m111_set_context(struct mt9m111 *mt9m111,
 278                                enum mt9m111_context ctxt)
 279 {
 280         struct i2c_client *client = v4l2_get_subdevdata(&mt9m111->subdev);
 281         int valB = MT9M111_CTXT_CTRL_RESTART | MT9M111_CTXT_CTRL_DEFECTCOR_B
 282                 | MT9M111_CTXT_CTRL_RESIZE_B | MT9M111_CTXT_CTRL_CTRL2_B
 283                 | MT9M111_CTXT_CTRL_GAMMA_B | MT9M111_CTXT_CTRL_READ_MODE_B
 284                 | MT9M111_CTXT_CTRL_VBLANK_SEL_B
 285                 | MT9M111_CTXT_CTRL_HBLANK_SEL_B;
 286         int valA = MT9M111_CTXT_CTRL_RESTART;
 287
 288         if (ctxt == HIGHPOWER)
 289                 return reg_write(CONTEXT_CONTROL, valB);
 290         else
 291                 return reg_write(CONTEXT_CONTROL, valA);
 292 }
 293
 294 static int mt9m111_setup_rect(struct mt9m111 *mt9m111,
 295                               struct v4l2_rect *rect)
 296 {
 297         struct i2c_client *client = v4l2_get_subdevdata(&mt9m111->subdev);
 298         int ret, is_raw_format;
 299         int width = rect->width;
 300         int height = rect->height;
 301
 302         if (mt9m111->fmt->code == V4L2_MBUS_FMT_SBGGR8_1X8 ||
 303             mt9m111->fmt->code == V4L2_MBUS_FMT_SBGGR10_2X8_PADHI_LE)
 304                 is_raw_format = 1;
 305         else
 306                 is_raw_format = 0;
 307
 308         ret = reg_write(COLUMN_START, rect->left);
 309         if (!ret)
 310                 ret = reg_write(ROW_START, rect->top);
 311
 312         if (is_raw_format) {
 313                 if (!ret)
 314                         ret = reg_write(WINDOW_WIDTH, width);
 315                 if (!ret)
 316                         ret = reg_write(WINDOW_HEIGHT, height);
 317         } else {
 318                 if (!ret)
 319                         ret = reg_write(REDUCER_XZOOM_B, MT9M111_MAX_WIDTH);
 320                 if (!ret)
 321                         ret = reg_write(REDUCER_YZOOM_B, MT9M111_MAX_HEIGHT);
 322                 if (!ret)
 323                         ret = reg_write(REDUCER_XSIZE_B, width);
 324                 if (!ret)
 325                         ret = reg_write(REDUCER_YSIZE_B, height);
 326                 if (!ret)
 327                         ret = reg_write(REDUCER_XZOOM_A, MT9M111_MAX_WIDTH);
 328                 if (!ret)
 329                         ret = reg_write(REDUCER_YZOOM_A, MT9M111_MAX_HEIGHT);
 330                 if (!ret)
 331                         ret = reg_write(REDUCER_XSIZE_A, width);
 332                 if (!ret)
 333                         ret = reg_write(REDUCER_YSIZE_A, height);
 334         }
 335
 336         return ret;
 337 }
 338
 339 static int mt9m111_enable(struct mt9m111 *mt9m111)
 340 {
 341         struct i2c_client *client = v4l2_get_subdevdata(&mt9m111->subdev);
 342         int ret;
 343
 344         ret = reg_set(RESET, MT9M111_RESET_CHIP_ENABLE);
 345         if (!ret)
 346                 mt9m111->powered = 1;
 347         return ret;
 348 }
 349
 350 static int mt9m111_reset(struct mt9m111 *mt9m111)
 351 {
 352         struct i2c_client *client = v4l2_get_subdevdata(&mt9m111->subdev);
 353         int ret;
 354
 355         ret = reg_set(RESET, MT9M111_RESET_RESET_MODE);
 356         if (!ret)
 357                 ret = reg_set(RESET, MT9M111_RESET_RESET_SOC);
 358         if (!ret)
 359                 ret = reg_clear(RESET, MT9M111_RESET_RESET_MODE
 360                                 | MT9M111_RESET_RESET_SOC);
 361
 362         return ret;
 363 }
 364
 365 static int mt9m111_make_rect(struct mt9m111 *mt9m111,
 366                              struct v4l2_rect *rect)
 367 {
 368         if (mt9m111->fmt->code == V4L2_MBUS_FMT_SBGGR8_1X8 ||
 369             mt9m111->fmt->code == V4L2_MBUS_FMT_SBGGR10_2X8_PADHI_LE) {
 370                 /* Bayer format - even size lengths */
 371                 rect->width     = ALIGN(rect->width, 2);
 372                 rect->height    = ALIGN(rect->height, 2);
 373                 /* Let the user play with the starting pixel */
 374         }
 375
 376         /* FIXME: the datasheet doesn't specify minimum sizes */
 377         soc_camera_limit_side(&rect->left, &rect->width,
 378                      MT9M111_MIN_DARK_COLS, 2, MT9M111_MAX_WIDTH);
 379
 380         soc_camera_limit_side(&rect->top, &rect->height,
 381                      MT9M111_MIN_DARK_ROWS, 2, MT9M111_MAX_HEIGHT);
 382
 383         return mt9m111_setup_rect(mt9m111, rect);
 384 }
 385
 386 static int mt9m111_s_crop(struct v4l2_subdev *sd, struct v4l2_crop *a)
 387 {
 388         struct v4l2_rect rect = a->c;
 389         struct i2c_client *client = v4l2_get_subdevdata(sd);
 390         struct mt9m111 *mt9m111 = container_of(sd, struct mt9m111, subdev);
 391         int ret;
 392
 393         dev_dbg(&client->dev, "%s left=%d, top=%d, width=%d, height=%d\n",
 394                 __func__, rect.left, rect.top, rect.width, rect.height);
 395
 396         if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
 397                 return -EINVAL;
 398
 399         ret = mt9m111_make_rect(mt9m111, &rect);
 400         if (!ret)
 401                 mt9m111->rect = rect;
 402         return ret;
 403 }
 404
 405 static int mt9m111_g_crop(struct v4l2_subdev *sd, struct v4l2_crop *a)
 406 {
 407         struct mt9m111 *mt9m111 = container_of(sd, struct mt9m111, subdev);
 408
 409         a->c    = mt9m111->rect;
 410         a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 411
 412         return 0;
 413 }
 414
 415 static int mt9m111_cropcap(struct v4l2_subdev *sd, struct v4l2_cropcap *a)
 416 {
 417         if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
 418                 return -EINVAL;
 419
 420         a->bounds.left                  = MT9M111_MIN_DARK_COLS;
 421         a->bounds.top                   = MT9M111_MIN_DARK_ROWS;
 422         a->bounds.width                 = MT9M111_MAX_WIDTH;
 423         a->bounds.height                = MT9M111_MAX_HEIGHT;
 424         a->defrect                      = a->bounds;
 425         a->pixelaspect.numerator        = 1;
 426         a->pixelaspect.denominator      = 1;
 427
 428         return 0;
 429 }
 430
 431 static int mt9m111_g_fmt(struct v4l2_subdev *sd,
 432                          struct v4l2_mbus_framefmt *mf)
 433 {
 434         struct mt9m111 *mt9m111 = container_of(sd, struct mt9m111, subdev);
 435
 436         mf->width       = mt9m111->rect.width;
 437         mf->height      = mt9m111->rect.height;
 438         mf->code        = mt9m111->fmt->code;
 439         mf->colorspace  = mt9m111->fmt->colorspace;
 440         mf->field       = V4L2_FIELD_NONE;
 441
 442         return 0;
 443 }
 444
 445 static int mt9m111_set_pixfmt(struct mt9m111 *mt9m111,
 446                               enum v4l2_mbus_pixelcode code)
 447 {
 448         struct i2c_client *client = v4l2_get_subdevdata(&mt9m111->subdev);
 449         u16 data_outfmt2, mask_outfmt2 = MT9M111_OUTFMT_PROCESSED_BAYER |
 450                 MT9M111_OUTFMT_BYPASS_IFP | MT9M111_OUTFMT_RGB |
 451                 MT9M111_OUTFMT_RGB565 | MT9M111_OUTFMT_RGB555 |
 452                 MT9M111_OUTFMT_RGB444x | MT9M111_OUTFMT_RGBx444 |
 453                 MT9M111_OUTFMT_SWAP_YCbCr_C_Y_RGB_EVEN |
 454                 MT9M111_OUTFMT_SWAP_YCbCr_Cb_Cr_RGB_R_B;
 455         int ret;
 456
 457         switch (code) {
 458         case V4L2_MBUS_FMT_SBGGR8_1X8:
 459                 data_outfmt2 = MT9M111_OUTFMT_PROCESSED_BAYER |
 460                         MT9M111_OUTFMT_RGB;
 461                 break;
 462         case V4L2_MBUS_FMT_SBGGR10_2X8_PADHI_LE:
 463                 data_outfmt2 = MT9M111_OUTFMT_BYPASS_IFP | MT9M111_OUTFMT_RGB;
 464                 break;
 465         case V4L2_MBUS_FMT_RGB555_2X8_PADHI_LE:
 466                 data_outfmt2 = MT9M111_OUTFMT_RGB | MT9M111_OUTFMT_RGB555 |
 467                         MT9M111_OUTFMT_SWAP_YCbCr_C_Y_RGB_EVEN;
 468                 break;
 469         case V4L2_MBUS_FMT_RGB555_2X8_PADHI_BE:
 470                 data_outfmt2 = MT9M111_OUTFMT_RGB | MT9M111_OUTFMT_RGB555;
 471                 break;
 472         case V4L2_MBUS_FMT_RGB565_2X8_LE:
 473                 data_outfmt2 = MT9M111_OUTFMT_RGB | MT9M111_OUTFMT_RGB565 |
 474                         MT9M111_OUTFMT_SWAP_YCbCr_C_Y_RGB_EVEN;
 475                 break;
 476         case V4L2_MBUS_FMT_RGB565_2X8_BE:
 477                 data_outfmt2 = MT9M111_OUTFMT_RGB | MT9M111_OUTFMT_RGB565;
 478                 break;
 479         case V4L2_MBUS_FMT_BGR565_2X8_BE:
 480                 data_outfmt2 = MT9M111_OUTFMT_RGB | MT9M111_OUTFMT_RGB565 |
 481                         MT9M111_OUTFMT_SWAP_YCbCr_Cb_Cr_RGB_R_B;
 482                 break;
 483         case V4L2_MBUS_FMT_BGR565_2X8_LE:
 484                 data_outfmt2 = MT9M111_OUTFMT_RGB | MT9M111_OUTFMT_RGB565 |
 485                         MT9M111_OUTFMT_SWAP_YCbCr_C_Y_RGB_EVEN |
 486                         MT9M111_OUTFMT_SWAP_YCbCr_Cb_Cr_RGB_R_B;
 487                 break;
 488         case V4L2_MBUS_FMT_UYVY8_2X8:
 489                 data_outfmt2 = 0;
 490                 break;
 491         case V4L2_MBUS_FMT_VYUY8_2X8:
 492                 data_outfmt2 = MT9M111_OUTFMT_SWAP_YCbCr_Cb_Cr_RGB_R_B;
 493                 break;
 494         case V4L2_MBUS_FMT_YUYV8_2X8:
 495                 data_outfmt2 = MT9M111_OUTFMT_SWAP_YCbCr_C_Y_RGB_EVEN;
 496                 break;
 497         case V4L2_MBUS_FMT_YVYU8_2X8:
 498                 data_outfmt2 = MT9M111_OUTFMT_SWAP_YCbCr_C_Y_RGB_EVEN |
 499                         MT9M111_OUTFMT_SWAP_YCbCr_Cb_Cr_RGB_R_B;
 500                 break;
 501         default:
 502                 dev_err(&client->dev, "Pixel format not handled: %x\n", code);
 503                 return -EINVAL;
 504         }
 505
 506         ret = reg_mask(OUTPUT_FORMAT_CTRL2_A, data_outfmt2,
 507                        mask_outfmt2);
 508         if (!ret)
 509                 ret = reg_mask(OUTPUT_FORMAT_CTRL2_B, data_outfmt2,
 510                                mask_outfmt2);
 511
 512         return ret;
 513 }
 514
 515 static int mt9m111_s_fmt(struct v4l2_subdev *sd,
 516                          struct v4l2_mbus_framefmt *mf)
 517 {
 518         struct i2c_client *client = v4l2_get_subdevdata(sd);
 519         const struct mt9m111_datafmt *fmt;
 520         struct mt9m111 *mt9m111 = container_of(sd, struct mt9m111, subdev);
 521         struct v4l2_rect rect = {
 522                 .left   = mt9m111->rect.left,
 523                 .top    = mt9m111->rect.top,
 524                 .width  = mf->width,
 525                 .height = mf->height,
 526         };
 527         int ret;
 528
 529         fmt = mt9m111_find_datafmt(mf->code, mt9m111_colour_fmts,
 530                                    ARRAY_SIZE(mt9m111_colour_fmts));
 531         if (!fmt)
 532                 return -EINVAL;
 533
 534         dev_dbg(&client->dev,
 535                 "%s code=%x left=%d, top=%d, width=%d, height=%d\n", __func__,
 536                 mf->code, rect.left, rect.top, rect.width, rect.height);
 537
 538         ret = mt9m111_make_rect(mt9m111, &rect);
 539         if (!ret)
 540                 ret = mt9m111_set_pixfmt(mt9m111, mf->code);
 541         if (!ret) {
 542                 mt9m111->rect   = rect;
 543                 mt9m111->fmt    = fmt;
 544                 mf->colorspace  = fmt->colorspace;
 545         }
 546
 547         return ret;
 548 }
 549
 550 static int mt9m111_try_fmt(struct v4l2_subdev *sd,
 551                            struct v4l2_mbus_framefmt *mf)
 552 {
 553         struct mt9m111 *mt9m111 = container_of(sd, struct mt9m111, subdev);
 554         const struct mt9m111_datafmt *fmt;
 555         bool bayer = mf->code == V4L2_MBUS_FMT_SBGGR8_1X8 ||
 556                 mf->code == V4L2_MBUS_FMT_SBGGR10_2X8_PADHI_LE;
 557
 558         fmt = mt9m111_find_datafmt(mf->code, mt9m111_colour_fmts,
 559                                    ARRAY_SIZE(mt9m111_colour_fmts));
 560         if (!fmt) {
 561                 fmt = mt9m111->fmt;
 562                 mf->code = fmt->code;
 563         }
 564
 565         /*
 566          * With Bayer format enforce even side lengths, but let the user play
 567          * with the starting pixel
 568          */
 569
 570         if (mf->height > MT9M111_MAX_HEIGHT)
 571                 mf->height = MT9M111_MAX_HEIGHT;
 572         else if (mf->height < 2)
 573                 mf->height = 2;
 574         else if (bayer)
 575                 mf->height = ALIGN(mf->height, 2);
 576
 577         if (mf->width > MT9M111_MAX_WIDTH)
 578                 mf->width = MT9M111_MAX_WIDTH;
 579         else if (mf->width < 2)
 580                 mf->width = 2;
 581         else if (bayer)
 582                 mf->width = ALIGN(mf->width, 2);
 583
 584         mf->colorspace = fmt->colorspace;
 585
 586         return 0;
 587 }
 588
 589 static int mt9m111_g_chip_ident(struct v4l2_subdev *sd,
 590                                 struct v4l2_dbg_chip_ident *id)
 591 {
 592         struct i2c_client *client = v4l2_get_subdevdata(sd);
 593         struct mt9m111 *mt9m111 = container_of(sd, struct mt9m111, subdev);
 594
 595         if (id->match.type != V4L2_CHIP_MATCH_I2C_ADDR)
 596                 return -EINVAL;
 597
 598         if (id->match.addr != client->addr)
 599                 return -ENODEV;
 600
 601         id->ident       = mt9m111->model;
 602         id->revision    = 0;
 603
 604         return 0;
 605 }
 606
 607 #ifdef CONFIG_VIDEO_ADV_DEBUG
 608 static int mt9m111_g_register(struct v4l2_subdev *sd,
 609                               struct v4l2_dbg_register *reg)
 610 {
 611         struct i2c_client *client = v4l2_get_subdevdata(sd);
 612         int val;
 613
 614         if (reg->match.type != V4L2_CHIP_MATCH_I2C_ADDR || reg->reg > 0x2ff)
 615                 return -EINVAL;
 616         if (reg->match.addr != client->addr)
 617                 return -ENODEV;
 618
 619         val = mt9m111_reg_read(client, reg->reg);
 620         reg->size = 2;
 621         reg->val = (u64)val;
 622
 623         if (reg->val > 0xffff)
 624                 return -EIO;
 625
 626         return 0;
 627 }
 628
 629 static int mt9m111_s_register(struct v4l2_subdev *sd,
 630                               struct v4l2_dbg_register *reg)
 631 {
 632         struct i2c_client *client = v4l2_get_subdevdata(sd);
 633
 634         if (reg->match.type != V4L2_CHIP_MATCH_I2C_ADDR || reg->reg > 0x2ff)
 635                 return -EINVAL;
 636
 637         if (reg->match.addr != client->addr)
 638                 return -ENODEV;
 639
 640         if (mt9m111_reg_write(client, reg->reg, reg->val) < 0)
 641                 return -EIO;
 642
 643         return 0;
 644 }
 645 #endif
 646
 647 static int mt9m111_set_flip(struct mt9m111 *mt9m111, int flip, int mask)
 648 {
 649         struct i2c_client *client = v4l2_get_subdevdata(&mt9m111->subdev);
 650         int ret;
 651
 652         if (mt9m111->context == HIGHPOWER) {
 653                 if (flip)
 654                         ret = reg_set(READ_MODE_B, mask);
 655                 else
 656                         ret = reg_clear(READ_MODE_B, mask);
 657         } else {
 658                 if (flip)
 659                         ret = reg_set(READ_MODE_A, mask);
 660                 else
 661                         ret = reg_clear(READ_MODE_A, mask);
 662         }
 663
 664         return ret;
 665 }
 666
 667 static int mt9m111_get_global_gain(struct mt9m111 *mt9m111)
 668 {
 669         struct i2c_client *client = v4l2_get_subdevdata(&mt9m111->subdev);
 670         int data;
 671
 672         data = reg_read(GLOBAL_GAIN);
 673         if (data >= 0)
 674                 return (data & 0x2f) * (1 << ((data >> 10) & 1)) *
 675                         (1 << ((data >> 9) & 1));
 676         return data;
 677 }
 678
 679 static int mt9m111_set_global_gain(struct mt9m111 *mt9m111, int gain)
 680 {
 681         struct i2c_client *client = v4l2_get_subdevdata(&mt9m111->subdev);
 682         u16 val;
 683
 684         if (gain > 63 * 2 * 2)
 685                 return -EINVAL;
 686
 687         if ((gain >= 64 * 2) && (gain < 63 * 2 * 2))
 688                 val = (1 << 10) | (1 << 9) | (gain / 4);
 689         else if ((gain >= 64) && (gain < 64 * 2))
 690                 val = (1 << 9) | (gain / 2);
 691         else
 692                 val = gain;
 693
 694         return reg_write(GLOBAL_GAIN, val);
 695 }
 696
 697 static int mt9m111_set_autoexposure(struct mt9m111 *mt9m111, int on)
 698 {
 699         struct i2c_client *client = v4l2_get_subdevdata(&mt9m111->subdev);
 700
 701         if (on)
 702                 return reg_set(OPER_MODE_CTRL, MT9M111_OPMODE_AUTOEXPO_EN);
 703         return reg_clear(OPER_MODE_CTRL, MT9M111_OPMODE_AUTOEXPO_EN);
 704 }
 705
 706 static int mt9m111_set_autowhitebalance(struct mt9m111 *mt9m111, int on)
 707 {
 708         struct i2c_client *client = v4l2_get_subdevdata(&mt9m111->subdev);
 709
 710         if (on)
 711                 return reg_set(OPER_MODE_CTRL, MT9M111_OPMODE_AUTOWHITEBAL_EN);
 712         return reg_clear(OPER_MODE_CTRL, MT9M111_OPMODE_AUTOWHITEBAL_EN);
 713 }
 714
 715 static int mt9m111_s_ctrl(struct v4l2_ctrl *ctrl)
 716 {
 717         struct mt9m111 *mt9m111 = container_of(ctrl->handler,
 718                                                struct mt9m111, hdl);
 719
 720         switch (ctrl->id) {
 721         case V4L2_CID_VFLIP:
 722                 return mt9m111_set_flip(mt9m111, ctrl->val,
 723                                         MT9M111_RMB_MIRROR_ROWS);
 724         case V4L2_CID_HFLIP:
 725                 return mt9m111_set_flip(mt9m111, ctrl->val,
 726                                         MT9M111_RMB_MIRROR_COLS);
 727         case V4L2_CID_GAIN:
 728                 return mt9m111_set_global_gain(mt9m111, ctrl->val);
 729         case V4L2_CID_EXPOSURE_AUTO:
 730                 return mt9m111_set_autoexposure(mt9m111, ctrl->val);
 731         case V4L2_CID_AUTO_WHITE_BALANCE:
 732                 return mt9m111_set_autowhitebalance(mt9m111, ctrl->val);
 733         }
 734
 735         return -EINVAL;
 736 }
 737
 738 static int mt9m111_suspend(struct mt9m111 *mt9m111)
 739 {
 740         v4l2_ctrl_s_ctrl(mt9m111->gain, mt9m111_get_global_gain(mt9m111));
 741
 742         return 0;
 743 }
 744
 745 static void mt9m111_restore_state(struct mt9m111 *mt9m111)
 746 {
 747         mt9m111_set_context(mt9m111, mt9m111->context);
 748         mt9m111_set_pixfmt(mt9m111, mt9m111->fmt->code);
 749         mt9m111_setup_rect(mt9m111, &mt9m111->rect);
 750         v4l2_ctrl_handler_setup(&mt9m111->hdl);
 751 }
 752
 753 static int mt9m111_resume(struct mt9m111 *mt9m111)
 754 {
 755         int ret = 0;
 756
 757         if (mt9m111->powered) {
 758                 ret = mt9m111_enable(mt9m111);
 759                 if (!ret)
 760                         ret = mt9m111_reset(mt9m111);
 761                 if (!ret)
 762                         mt9m111_restore_state(mt9m111);
 763         }
 764         return ret;
 765 }
 766
 767 static int mt9m111_init(struct mt9m111 *mt9m111)
 768 {
 769         struct i2c_client *client = v4l2_get_subdevdata(&mt9m111->subdev);
 770         int ret;
 771
 772         mt9m111->context = HIGHPOWER;
 773         ret = mt9m111_enable(mt9m111);
 774         if (!ret)
 775                 ret = mt9m111_reset(mt9m111);
 776         if (!ret)
 777                 ret = mt9m111_set_context(mt9m111, mt9m111->context);
 778         if (ret)
 779                 dev_err(&client->dev, "mt9m111 init failed: %d\n", ret);
 780         return ret;
 781 }
 782
 783 /*
 784  * Interface active, can use i2c. If it fails, it can indeed mean, that
 785  * this wasn't our capture interface, so, we wait for the right one
 786  */
 787 static int mt9m111_video_probe(struct soc_camera_device *icd,
 788                                struct i2c_client *client)
 789 {
 790         struct mt9m111 *mt9m111 = to_mt9m111(client);
 791         s32 data;
 792         int ret;
 793
 794         /* We must have a parent by now. And it cannot be a wrong one. */
 795         BUG_ON(!icd->parent ||
 796                to_soc_camera_host(icd->parent)->nr != icd->iface);
 797
 798         mt9m111->lastpage = -1;
 799
 800         data = reg_read(CHIP_VERSION);
 801
 802         switch (data) {
 803         case 0x143a: /* MT9M111 or MT9M131 */
 804                 mt9m111->model = V4L2_IDENT_MT9M111;
 805                 dev_info(&client->dev,
 806                         "Detected a MT9M111/MT9M131 chip ID %x\n", data);
 807                 break;
 808         case 0x148c: /* MT9M112 */
 809                 mt9m111->model = V4L2_IDENT_MT9M112;
 810                 dev_info(&client->dev, "Detected a MT9M112 chip ID %x\n", data);
 811                 break;
 812         default:
 813                 dev_err(&client->dev,
 814                         "No MT9M111/MT9M112/MT9M131 chip detected register read %x\n",
 815                         data);
 816                 return -ENODEV;
 817         }
 818
 819         ret = mt9m111_init(mt9m111);
 820         if (ret)
 821                 return ret;
 822         return v4l2_ctrl_handler_setup(&mt9m111->hdl);
 823 }
 824
 825 static int mt9m111_s_power(struct v4l2_subdev *sd, int on)
 826 {
 827         struct mt9m111 *mt9m111 = container_of(sd, struct mt9m111, subdev);
 828         struct i2c_client *client = v4l2_get_subdevdata(sd);
 829         int ret = 0;
 830
 831         mutex_lock(&mt9m111->power_lock);
 832
 833         /*
 834          * If the power count is modified from 0 to != 0 or from != 0 to 0,
 835          * update the power state.
 836          */
 837         if (mt9m111->power_count == !on) {
 838                 if (on) {
 839                         ret = mt9m111_resume(mt9m111);
 840                         if (ret) {
 841                                 dev_err(&client->dev,
 842                                         "Failed to resume the sensor: %d\n", ret);
 843                                 goto out;
 844                         }
 845                 } else {
 846                         mt9m111_suspend(mt9m111);
 847                 }
 848         }
 849
 850         /* Update the power count. */
 851         mt9m111->power_count += on ? 1 : -1;
 852         WARN_ON(mt9m111->power_count < 0);
 853
 854 out:
 855         mutex_unlock(&mt9m111->power_lock);
 856         return ret;
 857 }
 858
 859 static const struct v4l2_ctrl_ops mt9m111_ctrl_ops = {
 860         .s_ctrl = mt9m111_s_ctrl,
 861 };
 862
 863 static struct v4l2_subdev_core_ops mt9m111_subdev_core_ops = {
 864         .g_chip_ident   = mt9m111_g_chip_ident,
 865         .s_power        = mt9m111_s_power,
 866 #ifdef CONFIG_VIDEO_ADV_DEBUG
 867         .g_register     = mt9m111_g_register,
 868         .s_register     = mt9m111_s_register,
 869 #endif
 870 };
 871
 872 static int mt9m111_enum_fmt(struct v4l2_subdev *sd, unsigned int index,
 873                             enum v4l2_mbus_pixelcode *code)
 874 {
 875         if (index >= ARRAY_SIZE(mt9m111_colour_fmts))
 876                 return -EINVAL;
 877
 878         *code = mt9m111_colour_fmts[index].code;
 879         return 0;
 880 }
 881
 882 static int mt9m111_g_mbus_config(struct v4l2_subdev *sd,
 883                                 struct v4l2_mbus_config *cfg)
 884 {
 885         struct i2c_client *client = v4l2_get_subdevdata(sd);
 886         struct soc_camera_device *icd = client->dev.platform_data;
 887         struct soc_camera_link *icl = to_soc_camera_link(icd);
 888
 889         cfg->flags = V4L2_MBUS_MASTER | V4L2_MBUS_PCLK_SAMPLE_RISING |
 890                 V4L2_MBUS_HSYNC_ACTIVE_HIGH | V4L2_MBUS_VSYNC_ACTIVE_HIGH |
 891                 V4L2_MBUS_DATA_ACTIVE_HIGH;
 892         cfg->type = V4L2_MBUS_PARALLEL;
 893         cfg->flags = soc_camera_apply_board_flags(icl, cfg);
 894
 895         return 0;
 896 }
 897
 898 static struct v4l2_subdev_video_ops mt9m111_subdev_video_ops = {
 899         .s_mbus_fmt     = mt9m111_s_fmt,
 900         .g_mbus_fmt     = mt9m111_g_fmt,
 901         .try_mbus_fmt   = mt9m111_try_fmt,
 902         .s_crop         = mt9m111_s_crop,
 903         .g_crop         = mt9m111_g_crop,
 904         .cropcap        = mt9m111_cropcap,
 905         .enum_mbus_fmt  = mt9m111_enum_fmt,
 906         .g_mbus_config  = mt9m111_g_mbus_config,
 907 };
 908
 909 static struct v4l2_subdev_ops mt9m111_subdev_ops = {
 910         .core   = &mt9m111_subdev_core_ops,
 911         .video  = &mt9m111_subdev_video_ops,
 912 };
 913
 914 static int mt9m111_probe(struct i2c_client *client,
 915                          const struct i2c_device_id *did)
 916 {
 917         struct mt9m111 *mt9m111;
 918         struct soc_camera_device *icd = client->dev.platform_data;
 919         struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent);
 920         struct soc_camera_link *icl;
 921         int ret;
 922
 923         if (!icd) {
 924                 dev_err(&client->dev, "mt9m111: soc-camera data missing!\n");
 925                 return -EINVAL;
 926         }
 927
 928         icl = to_soc_camera_link(icd);
 929         if (!icl) {
 930                 dev_err(&client->dev, "mt9m111: driver needs platform data\n");
 931                 return -EINVAL;
 932         }
 933
 934         if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_WORD_DATA)) {
 935                 dev_warn(&adapter->dev,
 936                          "I2C-Adapter doesn't support I2C_FUNC_SMBUS_WORD\n");
 937                 return -EIO;
 938         }
 939
 940         mt9m111 = kzalloc(sizeof(struct mt9m111), GFP_KERNEL);
 941         if (!mt9m111)
 942                 return -ENOMEM;
 943
 944         v4l2_i2c_subdev_init(&mt9m111->subdev, client, &mt9m111_subdev_ops);
 945         v4l2_ctrl_handler_init(&mt9m111->hdl, 5);
 946         v4l2_ctrl_new_std(&mt9m111->hdl, &mt9m111_ctrl_ops,
 947                         V4L2_CID_VFLIP, 0, 1, 1, 0);
 948         v4l2_ctrl_new_std(&mt9m111->hdl, &mt9m111_ctrl_ops,
 949                         V4L2_CID_HFLIP, 0, 1, 1, 0);
 950         v4l2_ctrl_new_std(&mt9m111->hdl, &mt9m111_ctrl_ops,
 951                         V4L2_CID_AUTO_WHITE_BALANCE, 0, 1, 1, 1);
 952         mt9m111->gain = v4l2_ctrl_new_std(&mt9m111->hdl, &mt9m111_ctrl_ops,
 953                         V4L2_CID_GAIN, 0, 63 * 2 * 2, 1, 32);
 954         v4l2_ctrl_new_std_menu(&mt9m111->hdl,
 955                         &mt9m111_ctrl_ops, V4L2_CID_EXPOSURE_AUTO, 1, 0,
 956                         V4L2_EXPOSURE_AUTO);
 957         mt9m111->subdev.ctrl_handler = &mt9m111->hdl;
 958         if (mt9m111->hdl.error) {
 959                 int err = mt9m111->hdl.error;
 960
 961                 kfree(mt9m111);
 962                 return err;
 963         }
 964
 965         /* Second stage probe - when a capture adapter is there */
 966         mt9m111->rect.left      = MT9M111_MIN_DARK_COLS;
 967         mt9m111->rect.top       = MT9M111_MIN_DARK_ROWS;
 968         mt9m111->rect.width     = MT9M111_MAX_WIDTH;
 969         mt9m111->rect.height    = MT9M111_MAX_HEIGHT;
 970         mt9m111->fmt            = &mt9m111_colour_fmts[0];
 971
 972         ret = mt9m111_video_probe(icd, client);
 973         if (ret) {
 974                 v4l2_ctrl_handler_free(&mt9m111->hdl);
 975                 kfree(mt9m111);
 976         }
 977
 978         return ret;
 979 }
 980
 981 static int mt9m111_remove(struct i2c_client *client)
 982 {
 983         struct mt9m111 *mt9m111 = to_mt9m111(client);
 984
 985         v4l2_device_unregister_subdev(&mt9m111->subdev);
 986         v4l2_ctrl_handler_free(&mt9m111->hdl);
 987         kfree(mt9m111);
 988
 989         return 0;
 990 }
 991
 992 static const struct i2c_device_id mt9m111_id[] = {
 993         { "mt9m111", 0 },
 994         { }
 995 };
 996 MODULE_DEVICE_TABLE(i2c, mt9m111_id);
 997
 998 static struct i2c_driver mt9m111_i2c_driver = {
 999         .driver = {
1000                 .name = "mt9m111",
1001         },
1002         .probe          = mt9m111_probe,
1003         .remove         = mt9m111_remove,
1004         .id_table       = mt9m111_id,
1005 };
1006
1007 static int __init mt9m111_mod_init(void)
1008 {
1009         return i2c_add_driver(&mt9m111_i2c_driver);
1010 }
1011
1012 static void __exit mt9m111_mod_exit(void)
1013 {
1014         i2c_del_driver(&mt9m111_i2c_driver);
1015 }
1016
1017 module_init(mt9m111_mod_init);
1018 module_exit(mt9m111_mod_exit);
1019
1020 MODULE_DESCRIPTION("Micron/Aptina MT9M111/MT9M112/MT9M131 Camera driver");
1021 MODULE_AUTHOR("Robert Jarzmik");
1022 MODULE_LICENSE("GPL");