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 #include <linux/v4l2-mediabus.h>
  17 #include <linux/module.h>
  18
  19 #include <media/soc_camera.h>
  20 #include <media/v4l2-common.h>
  21 #include <media/v4l2-ctrls.h>
  22 #include <media/v4l2-chip-ident.h>
  23
  24 /*
  25  * MT9M111, MT9M112 and MT9M131:
  26  * i2c address is 0x48 or 0x5d (depending on SADDR pin)
  27  * The platform has to define i2c_board_info and call i2c_register_board_info()
  28  */
  29
  30 /*
  31  * Sensor core register addresses (0x000..0x0ff)
  32  */
  33 #define MT9M111_CHIP_VERSION            0x000
  34 #define MT9M111_ROW_START               0x001
  35 #define MT9M111_COLUMN_START            0x002
  36 #define MT9M111_WINDOW_HEIGHT           0x003
  37 #define MT9M111_WINDOW_WIDTH            0x004
  38 #define MT9M111_HORIZONTAL_BLANKING_B   0x005
  39 #define MT9M111_VERTICAL_BLANKING_B     0x006
  40 #define MT9M111_HORIZONTAL_BLANKING_A   0x007
  41 #define MT9M111_VERTICAL_BLANKING_A     0x008
  42 #define MT9M111_SHUTTER_WIDTH           0x009
  43 #define MT9M111_ROW_SPEED               0x00a
  44 #define MT9M111_EXTRA_DELAY             0x00b
  45 #define MT9M111_SHUTTER_DELAY           0x00c
  46 #define MT9M111_RESET                   0x00d
  47 #define MT9M111_READ_MODE_B             0x020
  48 #define MT9M111_READ_MODE_A             0x021
  49 #define MT9M111_FLASH_CONTROL           0x023
  50 #define MT9M111_GREEN1_GAIN             0x02b
  51 #define MT9M111_BLUE_GAIN               0x02c
  52 #define MT9M111_RED_GAIN                0x02d
  53 #define MT9M111_GREEN2_GAIN             0x02e
  54 #define MT9M111_GLOBAL_GAIN             0x02f
  55 #define MT9M111_CONTEXT_CONTROL         0x0c8
  56 #define MT9M111_PAGE_MAP                0x0f0
  57 #define MT9M111_BYTE_WISE_ADDR          0x0f1
  58
  59 #define MT9M111_RESET_SYNC_CHANGES      (1 << 15)
  60 #define MT9M111_RESET_RESTART_BAD_FRAME (1 << 9)
  61 #define MT9M111_RESET_SHOW_BAD_FRAMES   (1 << 8)
  62 #define MT9M111_RESET_RESET_SOC         (1 << 5)
  63 #define MT9M111_RESET_OUTPUT_DISABLE    (1 << 4)
  64 #define MT9M111_RESET_CHIP_ENABLE       (1 << 3)
  65 #define MT9M111_RESET_ANALOG_STANDBY    (1 << 2)
  66 #define MT9M111_RESET_RESTART_FRAME     (1 << 1)
  67 #define MT9M111_RESET_RESET_MODE        (1 << 0)
  68
  69 #define MT9M111_RM_FULL_POWER_RD        (0 << 10)
  70 #define MT9M111_RM_LOW_POWER_RD         (1 << 10)
  71 #define MT9M111_RM_COL_SKIP_4X          (1 << 5)
  72 #define MT9M111_RM_ROW_SKIP_4X          (1 << 4)
  73 #define MT9M111_RM_COL_SKIP_2X          (1 << 3)
  74 #define MT9M111_RM_ROW_SKIP_2X          (1 << 2)
  75 #define MT9M111_RMB_MIRROR_COLS         (1 << 1)
  76 #define MT9M111_RMB_MIRROR_ROWS         (1 << 0)
  77 #define MT9M111_CTXT_CTRL_RESTART       (1 << 15)
  78 #define MT9M111_CTXT_CTRL_DEFECTCOR_B   (1 << 12)
  79 #define MT9M111_CTXT_CTRL_RESIZE_B      (1 << 10)
  80 #define MT9M111_CTXT_CTRL_CTRL2_B       (1 << 9)
  81 #define MT9M111_CTXT_CTRL_GAMMA_B       (1 << 8)
  82 #define MT9M111_CTXT_CTRL_XENON_EN      (1 << 7)
  83 #define MT9M111_CTXT_CTRL_READ_MODE_B   (1 << 3)
  84 #define MT9M111_CTXT_CTRL_LED_FLASH_EN  (1 << 2)
  85 #define MT9M111_CTXT_CTRL_VBLANK_SEL_B  (1 << 1)
  86 #define MT9M111_CTXT_CTRL_HBLANK_SEL_B  (1 << 0)
  87
  88 /*
  89  * Colorpipe register addresses (0x100..0x1ff)
  90  */
  91 #define MT9M111_OPER_MODE_CTRL          0x106
  92 #define MT9M111_OUTPUT_FORMAT_CTRL      0x108
  93 #define MT9M111_REDUCER_XZOOM_B         0x1a0
  94 #define MT9M111_REDUCER_XSIZE_B         0x1a1
  95 #define MT9M111_REDUCER_YZOOM_B         0x1a3
  96 #define MT9M111_REDUCER_YSIZE_B         0x1a4
  97 #define MT9M111_REDUCER_XZOOM_A         0x1a6
  98 #define MT9M111_REDUCER_XSIZE_A         0x1a7
  99 #define MT9M111_REDUCER_YZOOM_A         0x1a9
 100 #define MT9M111_REDUCER_YSIZE_A         0x1aa
 101
 102 #define MT9M111_OUTPUT_FORMAT_CTRL2_A   0x13a
 103 #define MT9M111_OUTPUT_FORMAT_CTRL2_B   0x19b
 104
 105 #define MT9M111_OPMODE_AUTOEXPO_EN      (1 << 14)
 106 #define MT9M111_OPMODE_AUTOWHITEBAL_EN  (1 << 1)
 107 #define MT9M111_OUTFMT_FLIP_BAYER_COL   (1 << 9)
 108 #define MT9M111_OUTFMT_FLIP_BAYER_ROW   (1 << 8)
 109 #define MT9M111_OUTFMT_PROCESSED_BAYER  (1 << 14)
 110 #define MT9M111_OUTFMT_BYPASS_IFP       (1 << 10)
 111 #define MT9M111_OUTFMT_INV_PIX_CLOCK    (1 << 9)
 112 #define MT9M111_OUTFMT_RGB              (1 << 8)
 113 #define MT9M111_OUTFMT_RGB565           (0 << 6)
 114 #define MT9M111_OUTFMT_RGB555           (1 << 6)
 115 #define MT9M111_OUTFMT_RGB444x          (2 << 6)
 116 #define MT9M111_OUTFMT_RGBx444          (3 << 6)
 117 #define MT9M111_OUTFMT_TST_RAMP_OFF     (0 << 4)
 118 #define MT9M111_OUTFMT_TST_RAMP_COL     (1 << 4)
 119 #define MT9M111_OUTFMT_TST_RAMP_ROW     (2 << 4)
 120 #define MT9M111_OUTFMT_TST_RAMP_FRAME   (3 << 4)
 121 #define MT9M111_OUTFMT_SHIFT_3_UP       (1 << 3)
 122 #define MT9M111_OUTFMT_AVG_CHROMA       (1 << 2)
 123 #define MT9M111_OUTFMT_SWAP_YCbCr_C_Y_RGB_EVEN  (1 << 1)
 124 #define MT9M111_OUTFMT_SWAP_YCbCr_Cb_Cr_RGB_R_B (1 << 0)
 125
 126 /*
 127  * Camera control register addresses (0x200..0x2ff not implemented)
 128  */
 129
 130 #define reg_read(reg) mt9m111_reg_read(client, MT9M111_##reg)
 131 #define reg_write(reg, val) mt9m111_reg_write(client, MT9M111_##reg, (val))
 132 #define reg_set(reg, val) mt9m111_reg_set(client, MT9M111_##reg, (val))
 133 #define reg_clear(reg, val) mt9m111_reg_clear(client, MT9M111_##reg, (val))
 134 #define reg_mask(reg, val, mask) mt9m111_reg_mask(client, MT9M111_##reg, \
 135                 (val), (mask))
 136
 137 #define MT9M111_MIN_DARK_ROWS   8
 138 #define MT9M111_MIN_DARK_COLS   26
 139 #define MT9M111_MAX_HEIGHT      1024
 140 #define MT9M111_MAX_WIDTH       1280
 141
 142 /* MT9M111 has only one fixed colorspace per pixelcode */
 143 struct mt9m111_datafmt {
 144         enum v4l2_mbus_pixelcode        code;
 145         enum v4l2_colorspace            colorspace;
 146 };
 147
 148 /* Find a data format by a pixel code in an array */
 149 static const struct mt9m111_datafmt *mt9m111_find_datafmt(
 150         enum v4l2_mbus_pixelcode code, const struct mt9m111_datafmt *fmt,
 151         int n)
 152 {
 153         int i;
 154         for (i = 0; i < n; i++)
 155                 if (fmt[i].code == code)
 156                         return fmt + i;
 157
 158         return NULL;
 159 }
 160
 161 static const struct mt9m111_datafmt mt9m111_colour_fmts[] = {
 162         {V4L2_MBUS_FMT_YUYV8_2X8, V4L2_COLORSPACE_JPEG},
 163         {V4L2_MBUS_FMT_YVYU8_2X8, V4L2_COLORSPACE_JPEG},
 164         {V4L2_MBUS_FMT_UYVY8_2X8, V4L2_COLORSPACE_JPEG},
 165         {V4L2_MBUS_FMT_VYUY8_2X8, V4L2_COLORSPACE_JPEG},
 166         {V4L2_MBUS_FMT_RGB555_2X8_PADHI_LE, V4L2_COLORSPACE_SRGB},
 167         {V4L2_MBUS_FMT_RGB555_2X8_PADHI_BE, V4L2_COLORSPACE_SRGB},
 168         {V4L2_MBUS_FMT_RGB565_2X8_LE, V4L2_COLORSPACE_SRGB},
 169         {V4L2_MBUS_FMT_RGB565_2X8_BE, V4L2_COLORSPACE_SRGB},
 170         {V4L2_MBUS_FMT_BGR565_2X8_LE, V4L2_COLORSPACE_SRGB},
 171         {V4L2_MBUS_FMT_BGR565_2X8_BE, V4L2_COLORSPACE_SRGB},
 172         {V4L2_MBUS_FMT_SBGGR8_1X8, V4L2_COLORSPACE_SRGB},
 173         {V4L2_MBUS_FMT_SBGGR10_2X8_PADHI_LE, V4L2_COLORSPACE_SRGB},
 174 };
 175
 176 enum mt9m111_context {
 177         HIGHPOWER = 0,
 178         LOWPOWER,
 179 };
 180
 181 struct mt9m111 {
 182         struct v4l2_subdev subdev;
 183         struct v4l2_ctrl_handler hdl;
 184         struct v4l2_ctrl *gain;
 185         int model;      /* V4L2_IDENT_MT9M111 or V4L2_IDENT_MT9M112 code
 186                          * from v4l2-chip-ident.h */
 187         enum mt9m111_context context;
 188         struct v4l2_rect rect;
 189         struct mutex power_lock; /* lock to protect power_count */
 190         int power_count;
 191         const struct mt9m111_datafmt *fmt;
 192         int lastpage;   /* PageMap cache value */
 193         unsigned char datawidth;
 194         unsigned int powered:1;
 195 };
 196
 197 static struct mt9m111 *to_mt9m111(const struct i2c_client *client)
 198 {
 199         return container_of(i2c_get_clientdata(client), struct mt9m111, subdev);
 200 }
 201
 202 static int reg_page_map_set(struct i2c_client *client, const u16 reg)
 203 {
 204         int ret;
 205         u16 page;
 206         struct mt9m111 *mt9m111 = to_mt9m111(client);
 207
 208         page = (reg >> 8);
 209         if (page == mt9m111->lastpage)
 210                 return 0;
 211         if (page > 2)
 212                 return -EINVAL;
 213
 214         ret = i2c_smbus_write_word_data(client, MT9M111_PAGE_MAP, swab16(page));
 215         if (!ret)
 216                 mt9m111->lastpage = page;
 217         return ret;
 218 }
 219
 220 static int mt9m111_reg_read(struct i2c_client *client, const u16 reg)
 221 {
 222         int ret;
 223
 224         ret = reg_page_map_set(client, reg);
 225         if (!ret)
 226                 ret = swab16(i2c_smbus_read_word_data(client, reg & 0xff));
 227
 228         dev_dbg(&client->dev, "read  reg.%03x -> %04x\n", reg, ret);
 229         return ret;
 230 }
 231
 232 static int mt9m111_reg_write(struct i2c_client *client, const u16 reg,
 233                              const u16 data)
 234 {
 235         int ret;
 236
 237         ret = reg_page_map_set(client, reg);
 238         if (!ret)
 239                 ret = i2c_smbus_write_word_data(client, reg & 0xff,
 240                                                 swab16(data));
 241         dev_dbg(&client->dev, "write reg.%03x = %04x -> %d\n", reg, data, ret);
 242         return ret;
 243 }
 244
 245 static int mt9m111_reg_set(struct i2c_client *client, const u16 reg,
 246                            const u16 data)
 247 {
 248         int ret;
 249
 250         ret = mt9m111_reg_read(client, reg);
 251         if (ret >= 0)
 252                 ret = mt9m111_reg_write(client, reg, ret | data);
 253         return ret;
 254 }
 255
 256 static int mt9m111_reg_clear(struct i2c_client *client, const u16 reg,
 257                              const u16 data)
 258 {
 259         int ret;
 260
 261         ret = mt9m111_reg_read(client, reg);
 262         if (ret >= 0)
 263                 ret = mt9m111_reg_write(client, reg, ret & ~data);
 264         return ret;
 265 }
 266
 267 static int mt9m111_reg_mask(struct i2c_client *client, const u16 reg,
 268                             const u16 data, const u16 mask)
 269 {
 270         int ret;
 271
 272         ret = mt9m111_reg_read(client, reg);
 273         if (ret >= 0)
 274                 ret = mt9m111_reg_write(client, reg, (ret & ~mask) | data);
 275         return ret;
 276 }
 277
 278 static int mt9m111_set_context(struct mt9m111 *mt9m111,
 279                                enum mt9m111_context ctxt)
 280 {
 281         struct i2c_client *client = v4l2_get_subdevdata(&mt9m111->subdev);
 282         int valB = MT9M111_CTXT_CTRL_RESTART | MT9M111_CTXT_CTRL_DEFECTCOR_B
 283                 | MT9M111_CTXT_CTRL_RESIZE_B | MT9M111_CTXT_CTRL_CTRL2_B
 284                 | MT9M111_CTXT_CTRL_GAMMA_B | MT9M111_CTXT_CTRL_READ_MODE_B
 285                 | MT9M111_CTXT_CTRL_VBLANK_SEL_B
 286                 | MT9M111_CTXT_CTRL_HBLANK_SEL_B;
 287         int valA = MT9M111_CTXT_CTRL_RESTART;
 288
 289         if (ctxt == HIGHPOWER)
 290                 return reg_write(CONTEXT_CONTROL, valB);
 291         else
 292                 return reg_write(CONTEXT_CONTROL, valA);
 293 }
 294
 295 static int mt9m111_setup_rect(struct mt9m111 *mt9m111,
 296                               struct v4l2_rect *rect)
 297 {
 298         struct i2c_client *client = v4l2_get_subdevdata(&mt9m111->subdev);
 299         int ret, is_raw_format;
 300         int width = rect->width;
 301         int height = rect->height;
 302
 303         if (mt9m111->fmt->code == V4L2_MBUS_FMT_SBGGR8_1X8 ||
 304             mt9m111->fmt->code == V4L2_MBUS_FMT_SBGGR10_2X8_PADHI_LE)
 305                 is_raw_format = 1;
 306         else
 307                 is_raw_format = 0;
 308
 309         ret = reg_write(COLUMN_START, rect->left);
 310         if (!ret)
 311                 ret = reg_write(ROW_START, rect->top);
 312
 313         if (is_raw_format) {
 314                 if (!ret)
 315                         ret = reg_write(WINDOW_WIDTH, width);
 316                 if (!ret)
 317                         ret = reg_write(WINDOW_HEIGHT, height);
 318         } else {
 319                 if (!ret)
 320                         ret = reg_write(REDUCER_XZOOM_B, MT9M111_MAX_WIDTH);
 321                 if (!ret)
 322                         ret = reg_write(REDUCER_YZOOM_B, MT9M111_MAX_HEIGHT);
 323                 if (!ret)
 324                         ret = reg_write(REDUCER_XSIZE_B, width);
 325                 if (!ret)
 326                         ret = reg_write(REDUCER_YSIZE_B, height);
 327                 if (!ret)
 328                         ret = reg_write(REDUCER_XZOOM_A, MT9M111_MAX_WIDTH);
 329                 if (!ret)
 330                         ret = reg_write(REDUCER_YZOOM_A, MT9M111_MAX_HEIGHT);
 331                 if (!ret)
 332                         ret = reg_write(REDUCER_XSIZE_A, width);
 333                 if (!ret)
 334                         ret = reg_write(REDUCER_YSIZE_A, height);
 335         }
 336
 337         return ret;
 338 }
 339
 340 static int mt9m111_enable(struct mt9m111 *mt9m111)
 341 {
 342         struct i2c_client *client = v4l2_get_subdevdata(&mt9m111->subdev);
 343         int ret;
 344
 345         ret = reg_set(RESET, MT9M111_RESET_CHIP_ENABLE);
 346         if (!ret)
 347                 mt9m111->powered = 1;
 348         return ret;
 349 }
 350
 351 static int mt9m111_reset(struct mt9m111 *mt9m111)
 352 {
 353         struct i2c_client *client = v4l2_get_subdevdata(&mt9m111->subdev);
 354         int ret;
 355
 356         ret = reg_set(RESET, MT9M111_RESET_RESET_MODE);
 357         if (!ret)
 358                 ret = reg_set(RESET, MT9M111_RESET_RESET_SOC);
 359         if (!ret)
 360                 ret = reg_clear(RESET, MT9M111_RESET_RESET_MODE
 361                                 | MT9M111_RESET_RESET_SOC);
 362
 363         return ret;
 364 }
 365
 366 static int mt9m111_make_rect(struct mt9m111 *mt9m111,
 367                              struct v4l2_rect *rect)
 368 {
 369         if (mt9m111->fmt->code == V4L2_MBUS_FMT_SBGGR8_1X8 ||
 370             mt9m111->fmt->code == V4L2_MBUS_FMT_SBGGR10_2X8_PADHI_LE) {
 371                 /* Bayer format - even size lengths */
 372                 rect->width     = ALIGN(rect->width, 2);
 373                 rect->height    = ALIGN(rect->height, 2);
 374                 /* Let the user play with the starting pixel */
 375         }
 376
 377         /* FIXME: the datasheet doesn't specify minimum sizes */
 378         soc_camera_limit_side(&rect->left, &rect->width,
 379                      MT9M111_MIN_DARK_COLS, 2, MT9M111_MAX_WIDTH);
 380
 381         soc_camera_limit_side(&rect->top, &rect->height,
 382                      MT9M111_MIN_DARK_ROWS, 2, MT9M111_MAX_HEIGHT);
 383
 384         return mt9m111_setup_rect(mt9m111, rect);
 385 }
 386
 387 static int mt9m111_s_crop(struct v4l2_subdev *sd, struct v4l2_crop *a)
 388 {
 389         struct v4l2_rect rect = a->c;
 390         struct i2c_client *client = v4l2_get_subdevdata(sd);
 391         struct mt9m111 *mt9m111 = container_of(sd, struct mt9m111, subdev);
 392         int ret;
 393
 394         dev_dbg(&client->dev, "%s left=%d, top=%d, width=%d, height=%d\n",
 395                 __func__, rect.left, rect.top, rect.width, rect.height);
 396
 397         if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
 398                 return -EINVAL;
 399
 400         ret = mt9m111_make_rect(mt9m111, &rect);
 401         if (!ret)
 402                 mt9m111->rect = rect;
 403         return ret;
 404 }
 405
 406 static int mt9m111_g_crop(struct v4l2_subdev *sd, struct v4l2_crop *a)
 407 {
 408         struct mt9m111 *mt9m111 = container_of(sd, struct mt9m111, subdev);
 409
 410         a->c    = mt9m111->rect;
 411         a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 412
 413         return 0;
 414 }
 415
 416 static int mt9m111_cropcap(struct v4l2_subdev *sd, struct v4l2_cropcap *a)
 417 {
 418         if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
 419                 return -EINVAL;
 420
 421         a->bounds.left                  = MT9M111_MIN_DARK_COLS;
 422         a->bounds.top                   = MT9M111_MIN_DARK_ROWS;
 423         a->bounds.width                 = MT9M111_MAX_WIDTH;
 424         a->bounds.height                = MT9M111_MAX_HEIGHT;
 425         a->defrect                      = a->bounds;
 426         a->pixelaspect.numerator        = 1;
 427         a->pixelaspect.denominator      = 1;
 428
 429         return 0;
 430 }
 431
 432 static int mt9m111_g_fmt(struct v4l2_subdev *sd,
 433                          struct v4l2_mbus_framefmt *mf)
 434 {
 435         struct mt9m111 *mt9m111 = container_of(sd, struct mt9m111, subdev);
 436
 437         mf->width       = mt9m111->rect.width;
 438         mf->height      = mt9m111->rect.height;
 439         mf->code        = mt9m111->fmt->code;
 440         mf->colorspace  = mt9m111->fmt->colorspace;
 441         mf->field       = V4L2_FIELD_NONE;
 442
 443         return 0;
 444 }
 445
 446 static int mt9m111_set_pixfmt(struct mt9m111 *mt9m111,
 447                               enum v4l2_mbus_pixelcode code)
 448 {
 449         struct i2c_client *client = v4l2_get_subdevdata(&mt9m111->subdev);
 450         u16 data_outfmt2, mask_outfmt2 = MT9M111_OUTFMT_PROCESSED_BAYER |
 451                 MT9M111_OUTFMT_BYPASS_IFP | MT9M111_OUTFMT_RGB |
 452                 MT9M111_OUTFMT_RGB565 | MT9M111_OUTFMT_RGB555 |
 453                 MT9M111_OUTFMT_RGB444x | MT9M111_OUTFMT_RGBx444 |
 454                 MT9M111_OUTFMT_SWAP_YCbCr_C_Y_RGB_EVEN |
 455                 MT9M111_OUTFMT_SWAP_YCbCr_Cb_Cr_RGB_R_B;
 456         int ret;
 457
 458         switch (code) {
 459         case V4L2_MBUS_FMT_SBGGR8_1X8:
 460                 data_outfmt2 = MT9M111_OUTFMT_PROCESSED_BAYER |
 461                         MT9M111_OUTFMT_RGB;
 462                 break;
 463         case V4L2_MBUS_FMT_SBGGR10_2X8_PADHI_LE:
 464                 data_outfmt2 = MT9M111_OUTFMT_BYPASS_IFP | MT9M111_OUTFMT_RGB;
 465                 break;
 466         case V4L2_MBUS_FMT_RGB555_2X8_PADHI_LE:
 467                 data_outfmt2 = MT9M111_OUTFMT_RGB | MT9M111_OUTFMT_RGB555 |
 468                         MT9M111_OUTFMT_SWAP_YCbCr_C_Y_RGB_EVEN;
 469                 break;
 470         case V4L2_MBUS_FMT_RGB555_2X8_PADHI_BE:
 471                 data_outfmt2 = MT9M111_OUTFMT_RGB | MT9M111_OUTFMT_RGB555;
 472                 break;
 473         case V4L2_MBUS_FMT_RGB565_2X8_LE:
 474                 data_outfmt2 = MT9M111_OUTFMT_RGB | MT9M111_OUTFMT_RGB565 |
 475                         MT9M111_OUTFMT_SWAP_YCbCr_C_Y_RGB_EVEN;
 476                 break;
 477         case V4L2_MBUS_FMT_RGB565_2X8_BE:
 478                 data_outfmt2 = MT9M111_OUTFMT_RGB | MT9M111_OUTFMT_RGB565;
 479                 break;
 480         case V4L2_MBUS_FMT_BGR565_2X8_BE:
 481                 data_outfmt2 = MT9M111_OUTFMT_RGB | MT9M111_OUTFMT_RGB565 |
 482                         MT9M111_OUTFMT_SWAP_YCbCr_Cb_Cr_RGB_R_B;
 483                 break;
 484         case V4L2_MBUS_FMT_BGR565_2X8_LE:
 485                 data_outfmt2 = MT9M111_OUTFMT_RGB | MT9M111_OUTFMT_RGB565 |
 486                         MT9M111_OUTFMT_SWAP_YCbCr_C_Y_RGB_EVEN |
 487                         MT9M111_OUTFMT_SWAP_YCbCr_Cb_Cr_RGB_R_B;
 488                 break;
 489         case V4L2_MBUS_FMT_UYVY8_2X8:
 490                 data_outfmt2 = 0;
 491                 break;
 492         case V4L2_MBUS_FMT_VYUY8_2X8:
 493                 data_outfmt2 = MT9M111_OUTFMT_SWAP_YCbCr_Cb_Cr_RGB_R_B;
 494                 break;
 495         case V4L2_MBUS_FMT_YUYV8_2X8:
 496                 data_outfmt2 = MT9M111_OUTFMT_SWAP_YCbCr_C_Y_RGB_EVEN;
 497                 break;
 498         case V4L2_MBUS_FMT_YVYU8_2X8:
 499                 data_outfmt2 = MT9M111_OUTFMT_SWAP_YCbCr_C_Y_RGB_EVEN |
 500                         MT9M111_OUTFMT_SWAP_YCbCr_Cb_Cr_RGB_R_B;
 501                 break;
 502         default:
 503                 dev_err(&client->dev, "Pixel format not handled: %x\n", code);
 504                 return -EINVAL;
 505         }
 506
 507         ret = reg_mask(OUTPUT_FORMAT_CTRL2_A, data_outfmt2,
 508                        mask_outfmt2);
 509         if (!ret)
 510                 ret = reg_mask(OUTPUT_FORMAT_CTRL2_B, data_outfmt2,
 511                                mask_outfmt2);
 512
 513         return ret;
 514 }
 515
 516 static int mt9m111_s_fmt(struct v4l2_subdev *sd,
 517                          struct v4l2_mbus_framefmt *mf)
 518 {
 519         struct i2c_client *client = v4l2_get_subdevdata(sd);
 520         const struct mt9m111_datafmt *fmt;
 521         struct mt9m111 *mt9m111 = container_of(sd, struct mt9m111, subdev);
 522         struct v4l2_rect rect = {
 523                 .left   = mt9m111->rect.left,
 524                 .top    = mt9m111->rect.top,
 525                 .width  = mf->width,
 526                 .height = mf->height,
 527         };
 528         int ret;
 529
 530         fmt = mt9m111_find_datafmt(mf->code, mt9m111_colour_fmts,
 531                                    ARRAY_SIZE(mt9m111_colour_fmts));
 532         if (!fmt)
 533                 return -EINVAL;
 534
 535         dev_dbg(&client->dev,
 536                 "%s code=%x left=%d, top=%d, width=%d, height=%d\n", __func__,
 537                 mf->code, rect.left, rect.top, rect.width, rect.height);
 538
 539         ret = mt9m111_make_rect(mt9m111, &rect);
 540         if (!ret)
 541                 ret = mt9m111_set_pixfmt(mt9m111, mf->code);
 542         if (!ret) {
 543                 mt9m111->rect   = rect;
 544                 mt9m111->fmt    = fmt;
 545                 mf->colorspace  = fmt->colorspace;
 546         }
 547
 548         return ret;
 549 }
 550
 551 static int mt9m111_try_fmt(struct v4l2_subdev *sd,
 552                            struct v4l2_mbus_framefmt *mf)
 553 {
 554         struct mt9m111 *mt9m111 = container_of(sd, struct mt9m111, subdev);
 555         const struct mt9m111_datafmt *fmt;
 556         bool bayer = mf->code == V4L2_MBUS_FMT_SBGGR8_1X8 ||
 557                 mf->code == V4L2_MBUS_FMT_SBGGR10_2X8_PADHI_LE;
 558
 559         fmt = mt9m111_find_datafmt(mf->code, mt9m111_colour_fmts,
 560                                    ARRAY_SIZE(mt9m111_colour_fmts));
 561         if (!fmt) {
 562                 fmt = mt9m111->fmt;
 563                 mf->code = fmt->code;
 564         }
 565
 566         /*
 567          * With Bayer format enforce even side lengths, but let the user play
 568          * with the starting pixel
 569          */
 570
 571         if (mf->height > MT9M111_MAX_HEIGHT)
 572                 mf->height = MT9M111_MAX_HEIGHT;
 573         else if (mf->height < 2)
 574                 mf->height = 2;
 575         else if (bayer)
 576                 mf->height = ALIGN(mf->height, 2);
 577
 578         if (mf->width > MT9M111_MAX_WIDTH)
 579                 mf->width = MT9M111_MAX_WIDTH;
 580         else if (mf->width < 2)
 581                 mf->width = 2;
 582         else if (bayer)
 583                 mf->width = ALIGN(mf->width, 2);
 584
 585         mf->colorspace = fmt->colorspace;
 586
 587         return 0;
 588 }
 589
 590 static int mt9m111_g_chip_ident(struct v4l2_subdev *sd,
 591                                 struct v4l2_dbg_chip_ident *id)
 592 {
 593         struct i2c_client *client = v4l2_get_subdevdata(sd);
 594         struct mt9m111 *mt9m111 = container_of(sd, struct mt9m111, subdev);
 595
 596         if (id->match.type != V4L2_CHIP_MATCH_I2C_ADDR)
 597                 return -EINVAL;
 598
 599         if (id->match.addr != client->addr)
 600                 return -ENODEV;
 601
 602         id->ident       = mt9m111->model;
 603         id->revision    = 0;
 604
 605         return 0;
 606 }
 607
 608 #ifdef CONFIG_VIDEO_ADV_DEBUG
 609 static int mt9m111_g_register(struct v4l2_subdev *sd,
 610                               struct v4l2_dbg_register *reg)
 611 {
 612         struct i2c_client *client = v4l2_get_subdevdata(sd);
 613         int val;
 614
 615         if (reg->match.type != V4L2_CHIP_MATCH_I2C_ADDR || reg->reg > 0x2ff)
 616                 return -EINVAL;
 617         if (reg->match.addr != client->addr)
 618                 return -ENODEV;
 619
 620         val = mt9m111_reg_read(client, reg->reg);
 621         reg->size = 2;
 622         reg->val = (u64)val;
 623
 624         if (reg->val > 0xffff)
 625                 return -EIO;
 626
 627         return 0;
 628 }
 629
 630 static int mt9m111_s_register(struct v4l2_subdev *sd,
 631                               struct v4l2_dbg_register *reg)
 632 {
 633         struct i2c_client *client = v4l2_get_subdevdata(sd);
 634
 635         if (reg->match.type != V4L2_CHIP_MATCH_I2C_ADDR || reg->reg > 0x2ff)
 636                 return -EINVAL;
 637
 638         if (reg->match.addr != client->addr)
 639                 return -ENODEV;
 640
 641         if (mt9m111_reg_write(client, reg->reg, reg->val) < 0)
 642                 return -EIO;
 643
 644         return 0;
 645 }
 646 #endif
 647
 648 static int mt9m111_set_flip(struct mt9m111 *mt9m111, int flip, int mask)
 649 {
 650         struct i2c_client *client = v4l2_get_subdevdata(&mt9m111->subdev);
 651         int ret;
 652
 653         if (mt9m111->context == HIGHPOWER) {
 654                 if (flip)
 655                         ret = reg_set(READ_MODE_B, mask);
 656                 else
 657                         ret = reg_clear(READ_MODE_B, mask);
 658         } else {
 659                 if (flip)
 660                         ret = reg_set(READ_MODE_A, mask);
 661                 else
 662                         ret = reg_clear(READ_MODE_A, mask);
 663         }
 664
 665         return ret;
 666 }
 667
 668 static int mt9m111_get_global_gain(struct mt9m111 *mt9m111)
 669 {
 670         struct i2c_client *client = v4l2_get_subdevdata(&mt9m111->subdev);
 671         int data;
 672
 673         data = reg_read(GLOBAL_GAIN);
 674         if (data >= 0)
 675                 return (data & 0x2f) * (1 << ((data >> 10) & 1)) *
 676                         (1 << ((data >> 9) & 1));
 677         return data;
 678 }
 679
 680 static int mt9m111_set_global_gain(struct mt9m111 *mt9m111, int gain)
 681 {
 682         struct i2c_client *client = v4l2_get_subdevdata(&mt9m111->subdev);
 683         u16 val;
 684
 685         if (gain > 63 * 2 * 2)
 686                 return -EINVAL;
 687
 688         if ((gain >= 64 * 2) && (gain < 63 * 2 * 2))
 689                 val = (1 << 10) | (1 << 9) | (gain / 4);
 690         else if ((gain >= 64) && (gain < 64 * 2))
 691                 val = (1 << 9) | (gain / 2);
 692         else
 693                 val = gain;
 694
 695         return reg_write(GLOBAL_GAIN, val);
 696 }
 697
 698 static int mt9m111_set_autoexposure(struct mt9m111 *mt9m111, int on)
 699 {
 700         struct i2c_client *client = v4l2_get_subdevdata(&mt9m111->subdev);
 701
 702         if (on)
 703                 return reg_set(OPER_MODE_CTRL, MT9M111_OPMODE_AUTOEXPO_EN);
 704         return reg_clear(OPER_MODE_CTRL, MT9M111_OPMODE_AUTOEXPO_EN);
 705 }
 706
 707 static int mt9m111_set_autowhitebalance(struct mt9m111 *mt9m111, int on)
 708 {
 709         struct i2c_client *client = v4l2_get_subdevdata(&mt9m111->subdev);
 710
 711         if (on)
 712                 return reg_set(OPER_MODE_CTRL, MT9M111_OPMODE_AUTOWHITEBAL_EN);
 713         return reg_clear(OPER_MODE_CTRL, MT9M111_OPMODE_AUTOWHITEBAL_EN);
 714 }
 715
 716 static int mt9m111_s_ctrl(struct v4l2_ctrl *ctrl)
 717 {
 718         struct mt9m111 *mt9m111 = container_of(ctrl->handler,
 719                                                struct mt9m111, hdl);
 720
 721         switch (ctrl->id) {
 722         case V4L2_CID_VFLIP:
 723                 return mt9m111_set_flip(mt9m111, ctrl->val,
 724                                         MT9M111_RMB_MIRROR_ROWS);
 725         case V4L2_CID_HFLIP:
 726                 return mt9m111_set_flip(mt9m111, ctrl->val,
 727                                         MT9M111_RMB_MIRROR_COLS);
 728         case V4L2_CID_GAIN:
 729                 return mt9m111_set_global_gain(mt9m111, ctrl->val);
 730         case V4L2_CID_EXPOSURE_AUTO:
 731                 return mt9m111_set_autoexposure(mt9m111, ctrl->val);
 732         case V4L2_CID_AUTO_WHITE_BALANCE:
 733                 return mt9m111_set_autowhitebalance(mt9m111, ctrl->val);
 734         }
 735
 736         return -EINVAL;
 737 }
 738
 739 static int mt9m111_suspend(struct mt9m111 *mt9m111)
 740 {
 741         v4l2_ctrl_s_ctrl(mt9m111->gain, mt9m111_get_global_gain(mt9m111));
 742
 743         return 0;
 744 }
 745
 746 static void mt9m111_restore_state(struct mt9m111 *mt9m111)
 747 {
 748         mt9m111_set_context(mt9m111, mt9m111->context);
 749         mt9m111_set_pixfmt(mt9m111, mt9m111->fmt->code);
 750         mt9m111_setup_rect(mt9m111, &mt9m111->rect);
 751         v4l2_ctrl_handler_setup(&mt9m111->hdl);
 752 }
 753
 754 static int mt9m111_resume(struct mt9m111 *mt9m111)
 755 {
 756         int ret = 0;
 757
 758         if (mt9m111->powered) {
 759                 ret = mt9m111_enable(mt9m111);
 760                 if (!ret)
 761                         ret = mt9m111_reset(mt9m111);
 762                 if (!ret)
 763                         mt9m111_restore_state(mt9m111);
 764         }
 765         return ret;
 766 }
 767
 768 static int mt9m111_init(struct mt9m111 *mt9m111)
 769 {
 770         struct i2c_client *client = v4l2_get_subdevdata(&mt9m111->subdev);
 771         int ret;
 772
 773         mt9m111->context = HIGHPOWER;
 774         ret = mt9m111_enable(mt9m111);
 775         if (!ret)
 776                 ret = mt9m111_reset(mt9m111);
 777         if (!ret)
 778                 ret = mt9m111_set_context(mt9m111, mt9m111->context);
 779         if (ret)
 780                 dev_err(&client->dev, "mt9m111 init failed: %d\n", ret);
 781         return ret;
 782 }
 783
 784 /*
 785  * Interface active, can use i2c. If it fails, it can indeed mean, that
 786  * this wasn't our capture interface, so, we wait for the right one
 787  */
 788 static int mt9m111_video_probe(struct i2c_client *client)
 789 {
 790         struct mt9m111 *mt9m111 = to_mt9m111(client);
 791         s32 data;
 792         int ret;
 793
 794         data = reg_read(CHIP_VERSION);
 795
 796         switch (data) {
 797         case 0x143a: /* MT9M111 or MT9M131 */
 798                 mt9m111->model = V4L2_IDENT_MT9M111;
 799                 dev_info(&client->dev,
 800                         "Detected a MT9M111/MT9M131 chip ID %x\n", data);
 801                 break;
 802         case 0x148c: /* MT9M112 */
 803                 mt9m111->model = V4L2_IDENT_MT9M112;
 804                 dev_info(&client->dev, "Detected a MT9M112 chip ID %x\n", data);
 805                 break;
 806         default:
 807                 dev_err(&client->dev,
 808                         "No MT9M111/MT9M112/MT9M131 chip detected register read %x\n",
 809                         data);
 810                 return -ENODEV;
 811         }
 812
 813         ret = mt9m111_init(mt9m111);
 814         if (ret)
 815                 return ret;
 816         return v4l2_ctrl_handler_setup(&mt9m111->hdl);
 817 }
 818
 819 static int mt9m111_s_power(struct v4l2_subdev *sd, int on)
 820 {
 821         struct mt9m111 *mt9m111 = container_of(sd, struct mt9m111, subdev);
 822         struct i2c_client *client = v4l2_get_subdevdata(sd);
 823         int ret = 0;
 824
 825         mutex_lock(&mt9m111->power_lock);
 826
 827         /*
 828          * If the power count is modified from 0 to != 0 or from != 0 to 0,
 829          * update the power state.
 830          */
 831         if (mt9m111->power_count == !on) {
 832                 if (on) {
 833                         ret = mt9m111_resume(mt9m111);
 834                         if (ret) {
 835                                 dev_err(&client->dev,
 836                                         "Failed to resume the sensor: %d\n", ret);
 837                                 goto out;
 838                         }
 839                 } else {
 840                         mt9m111_suspend(mt9m111);
 841                 }
 842         }
 843
 844         /* Update the power count. */
 845         mt9m111->power_count += on ? 1 : -1;
 846         WARN_ON(mt9m111->power_count < 0);
 847
 848 out:
 849         mutex_unlock(&mt9m111->power_lock);
 850         return ret;
 851 }
 852
 853 static const struct v4l2_ctrl_ops mt9m111_ctrl_ops = {
 854         .s_ctrl = mt9m111_s_ctrl,
 855 };
 856
 857 static struct v4l2_subdev_core_ops mt9m111_subdev_core_ops = {
 858         .g_chip_ident   = mt9m111_g_chip_ident,
 859         .s_power        = mt9m111_s_power,
 860 #ifdef CONFIG_VIDEO_ADV_DEBUG
 861         .g_register     = mt9m111_g_register,
 862         .s_register     = mt9m111_s_register,
 863 #endif
 864 };
 865
 866 static int mt9m111_enum_fmt(struct v4l2_subdev *sd, unsigned int index,
 867                             enum v4l2_mbus_pixelcode *code)
 868 {
 869         if (index >= ARRAY_SIZE(mt9m111_colour_fmts))
 870                 return -EINVAL;
 871
 872         *code = mt9m111_colour_fmts[index].code;
 873         return 0;
 874 }
 875
 876 static int mt9m111_g_mbus_config(struct v4l2_subdev *sd,
 877                                 struct v4l2_mbus_config *cfg)
 878 {
 879         struct i2c_client *client = v4l2_get_subdevdata(sd);
 880         struct soc_camera_link *icl = soc_camera_i2c_to_link(client);
 881
 882         cfg->flags = V4L2_MBUS_MASTER | V4L2_MBUS_PCLK_SAMPLE_RISING |
 883                 V4L2_MBUS_HSYNC_ACTIVE_HIGH | V4L2_MBUS_VSYNC_ACTIVE_HIGH |
 884                 V4L2_MBUS_DATA_ACTIVE_HIGH;
 885         cfg->type = V4L2_MBUS_PARALLEL;
 886         cfg->flags = soc_camera_apply_board_flags(icl, cfg);
 887
 888         return 0;
 889 }
 890
 891 static struct v4l2_subdev_video_ops mt9m111_subdev_video_ops = {
 892         .s_mbus_fmt     = mt9m111_s_fmt,
 893         .g_mbus_fmt     = mt9m111_g_fmt,
 894         .try_mbus_fmt   = mt9m111_try_fmt,
 895         .s_crop         = mt9m111_s_crop,
 896         .g_crop         = mt9m111_g_crop,
 897         .cropcap        = mt9m111_cropcap,
 898         .enum_mbus_fmt  = mt9m111_enum_fmt,
 899         .g_mbus_config  = mt9m111_g_mbus_config,
 900 };
 901
 902 static struct v4l2_subdev_ops mt9m111_subdev_ops = {
 903         .core   = &mt9m111_subdev_core_ops,
 904         .video  = &mt9m111_subdev_video_ops,
 905 };
 906
 907 static int mt9m111_probe(struct i2c_client *client,
 908                          const struct i2c_device_id *did)
 909 {
 910         struct mt9m111 *mt9m111;
 911         struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent);
 912         struct soc_camera_link *icl = soc_camera_i2c_to_link(client);
 913         int ret;
 914
 915         if (!icl) {
 916                 dev_err(&client->dev, "mt9m111: driver needs platform data\n");
 917                 return -EINVAL;
 918         }
 919
 920         if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_WORD_DATA)) {
 921                 dev_warn(&adapter->dev,
 922                          "I2C-Adapter doesn't support I2C_FUNC_SMBUS_WORD\n");
 923                 return -EIO;
 924         }
 925
 926         mt9m111 = kzalloc(sizeof(struct mt9m111), GFP_KERNEL);
 927         if (!mt9m111)
 928                 return -ENOMEM;
 929
 930         v4l2_i2c_subdev_init(&mt9m111->subdev, client, &mt9m111_subdev_ops);
 931         v4l2_ctrl_handler_init(&mt9m111->hdl, 5);
 932         v4l2_ctrl_new_std(&mt9m111->hdl, &mt9m111_ctrl_ops,
 933                         V4L2_CID_VFLIP, 0, 1, 1, 0);
 934         v4l2_ctrl_new_std(&mt9m111->hdl, &mt9m111_ctrl_ops,
 935                         V4L2_CID_HFLIP, 0, 1, 1, 0);
 936         v4l2_ctrl_new_std(&mt9m111->hdl, &mt9m111_ctrl_ops,
 937                         V4L2_CID_AUTO_WHITE_BALANCE, 0, 1, 1, 1);
 938         mt9m111->gain = v4l2_ctrl_new_std(&mt9m111->hdl, &mt9m111_ctrl_ops,
 939                         V4L2_CID_GAIN, 0, 63 * 2 * 2, 1, 32);
 940         v4l2_ctrl_new_std_menu(&mt9m111->hdl,
 941                         &mt9m111_ctrl_ops, V4L2_CID_EXPOSURE_AUTO, 1, 0,
 942                         V4L2_EXPOSURE_AUTO);
 943         mt9m111->subdev.ctrl_handler = &mt9m111->hdl;
 944         if (mt9m111->hdl.error) {
 945                 int err = mt9m111->hdl.error;
 946
 947                 kfree(mt9m111);
 948                 return err;
 949         }
 950
 951         /* Second stage probe - when a capture adapter is there */
 952         mt9m111->rect.left      = MT9M111_MIN_DARK_COLS;
 953         mt9m111->rect.top       = MT9M111_MIN_DARK_ROWS;
 954         mt9m111->rect.width     = MT9M111_MAX_WIDTH;
 955         mt9m111->rect.height    = MT9M111_MAX_HEIGHT;
 956         mt9m111->fmt            = &mt9m111_colour_fmts[0];
 957         mt9m111->lastpage       = -1;
 958         mutex_init(&mt9m111->power_lock);
 959
 960         ret = mt9m111_video_probe(client);
 961         if (ret) {
 962                 v4l2_ctrl_handler_free(&mt9m111->hdl);
 963                 kfree(mt9m111);
 964         }
 965
 966         return ret;
 967 }
 968
 969 static int mt9m111_remove(struct i2c_client *client)
 970 {
 971         struct mt9m111 *mt9m111 = to_mt9m111(client);
 972
 973         v4l2_device_unregister_subdev(&mt9m111->subdev);
 974         v4l2_ctrl_handler_free(&mt9m111->hdl);
 975         kfree(mt9m111);
 976
 977         return 0;
 978 }
 979
 980 static const struct i2c_device_id mt9m111_id[] = {
 981         { "mt9m111", 0 },
 982         { }
 983 };
 984 MODULE_DEVICE_TABLE(i2c, mt9m111_id);
 985
 986 static struct i2c_driver mt9m111_i2c_driver = {
 987         .driver = {
 988                 .name = "mt9m111",
 989         },
 990         .probe          = mt9m111_probe,
 991         .remove         = mt9m111_remove,
 992         .id_table       = mt9m111_id,
 993 };
 994
 995 static int __init mt9m111_mod_init(void)
 996 {
 997         return i2c_add_driver(&mt9m111_i2c_driver);
 998 }
 999
1000 static void __exit mt9m111_mod_exit(void)
1001 {
1002         i2c_del_driver(&mt9m111_i2c_driver);
1003 }
1004
1005 module_init(mt9m111_mod_init);
1006 module_exit(mt9m111_mod_exit);
1007
1008 MODULE_DESCRIPTION("Micron/Aptina MT9M111/MT9M112/MT9M131 Camera driver");
1009 MODULE_AUTHOR("Robert Jarzmik");
1010 MODULE_LICENSE("GPL");