kernel/drivers/media/i2c/soc_camera/rj54n1cb0c.c

   1 /*
   2  * Driver for RJ54N1CB0C CMOS Image Sensor from Sharp
   3  *
   4  * Copyright (C) 2009, Guennadi Liakhovetski <g.liakhovetski@gmx.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/delay.h>
  12 #include <linux/i2c.h>
  13 #include <linux/slab.h>
  14 #include <linux/v4l2-mediabus.h>
  15 #include <linux/videodev2.h>
  16 #include <linux/module.h>
  17
  18 #include <media/rj54n1cb0c.h>
  19 #include <media/soc_camera.h>
  20 #include <media/v4l2-clk.h>
  21 #include <media/v4l2-subdev.h>
  22 #include <media/v4l2-ctrls.h>
  23
  24 #define RJ54N1_DEV_CODE                 0x0400
  25 #define RJ54N1_DEV_CODE2                0x0401
  26 #define RJ54N1_OUT_SEL                  0x0403
  27 #define RJ54N1_XY_OUTPUT_SIZE_S_H       0x0404
  28 #define RJ54N1_X_OUTPUT_SIZE_S_L        0x0405
  29 #define RJ54N1_Y_OUTPUT_SIZE_S_L        0x0406
  30 #define RJ54N1_XY_OUTPUT_SIZE_P_H       0x0407
  31 #define RJ54N1_X_OUTPUT_SIZE_P_L        0x0408
  32 #define RJ54N1_Y_OUTPUT_SIZE_P_L        0x0409
  33 #define RJ54N1_LINE_LENGTH_PCK_S_H      0x040a
  34 #define RJ54N1_LINE_LENGTH_PCK_S_L      0x040b
  35 #define RJ54N1_LINE_LENGTH_PCK_P_H      0x040c
  36 #define RJ54N1_LINE_LENGTH_PCK_P_L      0x040d
  37 #define RJ54N1_RESIZE_N                 0x040e
  38 #define RJ54N1_RESIZE_N_STEP            0x040f
  39 #define RJ54N1_RESIZE_STEP              0x0410
  40 #define RJ54N1_RESIZE_HOLD_H            0x0411
  41 #define RJ54N1_RESIZE_HOLD_L            0x0412
  42 #define RJ54N1_H_OBEN_OFS               0x0413
  43 #define RJ54N1_V_OBEN_OFS               0x0414
  44 #define RJ54N1_RESIZE_CONTROL           0x0415
  45 #define RJ54N1_STILL_CONTROL            0x0417
  46 #define RJ54N1_INC_USE_SEL_H            0x0425
  47 #define RJ54N1_INC_USE_SEL_L            0x0426
  48 #define RJ54N1_MIRROR_STILL_MODE        0x0427
  49 #define RJ54N1_INIT_START               0x0428
  50 #define RJ54N1_SCALE_1_2_LEV            0x0429
  51 #define RJ54N1_SCALE_4_LEV              0x042a
  52 #define RJ54N1_Y_GAIN                   0x04d8
  53 #define RJ54N1_APT_GAIN_UP              0x04fa
  54 #define RJ54N1_RA_SEL_UL                0x0530
  55 #define RJ54N1_BYTE_SWAP                0x0531
  56 #define RJ54N1_OUT_SIGPO                0x053b
  57 #define RJ54N1_WB_SEL_WEIGHT_I          0x054e
  58 #define RJ54N1_BIT8_WB                  0x0569
  59 #define RJ54N1_HCAPS_WB                 0x056a
  60 #define RJ54N1_VCAPS_WB                 0x056b
  61 #define RJ54N1_HCAPE_WB                 0x056c
  62 #define RJ54N1_VCAPE_WB                 0x056d
  63 #define RJ54N1_EXPOSURE_CONTROL         0x058c
  64 #define RJ54N1_FRAME_LENGTH_S_H         0x0595
  65 #define RJ54N1_FRAME_LENGTH_S_L         0x0596
  66 #define RJ54N1_FRAME_LENGTH_P_H         0x0597
  67 #define RJ54N1_FRAME_LENGTH_P_L         0x0598
  68 #define RJ54N1_PEAK_H                   0x05b7
  69 #define RJ54N1_PEAK_50                  0x05b8
  70 #define RJ54N1_PEAK_60                  0x05b9
  71 #define RJ54N1_PEAK_DIFF                0x05ba
  72 #define RJ54N1_IOC                      0x05ef
  73 #define RJ54N1_TG_BYPASS                0x0700
  74 #define RJ54N1_PLL_L                    0x0701
  75 #define RJ54N1_PLL_N                    0x0702
  76 #define RJ54N1_PLL_EN                   0x0704
  77 #define RJ54N1_RATIO_TG                 0x0706
  78 #define RJ54N1_RATIO_T                  0x0707
  79 #define RJ54N1_RATIO_R                  0x0708
  80 #define RJ54N1_RAMP_TGCLK_EN            0x0709
  81 #define RJ54N1_OCLK_DSP                 0x0710
  82 #define RJ54N1_RATIO_OP                 0x0711
  83 #define RJ54N1_RATIO_O                  0x0712
  84 #define RJ54N1_OCLK_SEL_EN              0x0713
  85 #define RJ54N1_CLK_RST                  0x0717
  86 #define RJ54N1_RESET_STANDBY            0x0718
  87 #define RJ54N1_FWFLG                    0x07fe
  88
  89 #define E_EXCLK                         (1 << 7)
  90 #define SOFT_STDBY                      (1 << 4)
  91 #define SEN_RSTX                        (1 << 2)
  92 #define TG_RSTX                         (1 << 1)
  93 #define DSP_RSTX                        (1 << 0)
  94
  95 #define RESIZE_HOLD_SEL                 (1 << 2)
  96 #define RESIZE_GO                       (1 << 1)
  97
  98 /*
  99  * When cropping, the camera automatically centers the cropped region, there
 100  * doesn't seem to be a way to specify an explicit location of the rectangle.
 101  */
 102 #define RJ54N1_COLUMN_SKIP              0
 103 #define RJ54N1_ROW_SKIP                 0
 104 #define RJ54N1_MAX_WIDTH                1600
 105 #define RJ54N1_MAX_HEIGHT               1200
 106
 107 #define PLL_L                           2
 108 #define PLL_N                           0x31
 109
 110 /* I2C addresses: 0x50, 0x51, 0x60, 0x61 */
 111
 112 /* RJ54N1CB0C has only one fixed colorspace per pixelcode */
 113 struct rj54n1_datafmt {
 114         u32     code;
 115         enum v4l2_colorspace            colorspace;
 116 };
 117
 118 /* Find a data format by a pixel code in an array */
 119 static const struct rj54n1_datafmt *rj54n1_find_datafmt(
 120         u32 code, const struct rj54n1_datafmt *fmt,
 121         int n)
 122 {
 123         int i;
 124         for (i = 0; i < n; i++)
 125                 if (fmt[i].code == code)
 126                         return fmt + i;
 127
 128         return NULL;
 129 }
 130
 131 static const struct rj54n1_datafmt rj54n1_colour_fmts[] = {
 132         {MEDIA_BUS_FMT_YUYV8_2X8, V4L2_COLORSPACE_JPEG},
 133         {MEDIA_BUS_FMT_YVYU8_2X8, V4L2_COLORSPACE_JPEG},
 134         {MEDIA_BUS_FMT_RGB565_2X8_LE, V4L2_COLORSPACE_SRGB},
 135         {MEDIA_BUS_FMT_RGB565_2X8_BE, V4L2_COLORSPACE_SRGB},
 136         {MEDIA_BUS_FMT_SBGGR10_2X8_PADHI_LE, V4L2_COLORSPACE_SRGB},
 137         {MEDIA_BUS_FMT_SBGGR10_2X8_PADLO_LE, V4L2_COLORSPACE_SRGB},
 138         {MEDIA_BUS_FMT_SBGGR10_2X8_PADHI_BE, V4L2_COLORSPACE_SRGB},
 139         {MEDIA_BUS_FMT_SBGGR10_2X8_PADLO_BE, V4L2_COLORSPACE_SRGB},
 140         {MEDIA_BUS_FMT_SBGGR10_1X10, V4L2_COLORSPACE_SRGB},
 141 };
 142
 143 struct rj54n1_clock_div {
 144         u8 ratio_tg;    /* can be 0 or an odd number */
 145         u8 ratio_t;
 146         u8 ratio_r;
 147         u8 ratio_op;
 148         u8 ratio_o;
 149 };
 150
 151 struct rj54n1 {
 152         struct v4l2_subdev subdev;
 153         struct v4l2_ctrl_handler hdl;
 154         struct v4l2_clk *clk;
 155         struct rj54n1_clock_div clk_div;
 156         const struct rj54n1_datafmt *fmt;
 157         struct v4l2_rect rect;  /* Sensor window */
 158         unsigned int tgclk_mhz;
 159         bool auto_wb;
 160         unsigned short width;   /* Output window */
 161         unsigned short height;
 162         unsigned short resize;  /* Sensor * 1024 / resize = Output */
 163         unsigned short scale;
 164         u8 bank;
 165 };
 166
 167 struct rj54n1_reg_val {
 168         u16 reg;
 169         u8 val;
 170 };
 171
 172 static const struct rj54n1_reg_val bank_4[] = {
 173         {0x417, 0},
 174         {0x42c, 0},
 175         {0x42d, 0xf0},
 176         {0x42e, 0},
 177         {0x42f, 0x50},
 178         {0x430, 0xf5},
 179         {0x431, 0x16},
 180         {0x432, 0x20},
 181         {0x433, 0},
 182         {0x434, 0xc8},
 183         {0x43c, 8},
 184         {0x43e, 0x90},
 185         {0x445, 0x83},
 186         {0x4ba, 0x58},
 187         {0x4bb, 4},
 188         {0x4bc, 0x20},
 189         {0x4db, 4},
 190         {0x4fe, 2},
 191 };
 192
 193 static const struct rj54n1_reg_val bank_5[] = {
 194         {0x514, 0},
 195         {0x516, 0},
 196         {0x518, 0},
 197         {0x51a, 0},
 198         {0x51d, 0xff},
 199         {0x56f, 0x28},
 200         {0x575, 0x40},
 201         {0x5bc, 0x48},
 202         {0x5c1, 6},
 203         {0x5e5, 0x11},
 204         {0x5e6, 0x43},
 205         {0x5e7, 0x33},
 206         {0x5e8, 0x21},
 207         {0x5e9, 0x30},
 208         {0x5ea, 0x0},
 209         {0x5eb, 0xa5},
 210         {0x5ec, 0xff},
 211         {0x5fe, 2},
 212 };
 213
 214 static const struct rj54n1_reg_val bank_7[] = {
 215         {0x70a, 0},
 216         {0x714, 0xff},
 217         {0x715, 0xff},
 218         {0x716, 0x1f},
 219         {0x7FE, 2},
 220 };
 221
 222 static const struct rj54n1_reg_val bank_8[] = {
 223         {0x800, 0x00},
 224         {0x801, 0x01},
 225         {0x802, 0x61},
 226         {0x805, 0x00},
 227         {0x806, 0x00},
 228         {0x807, 0x00},
 229         {0x808, 0x00},
 230         {0x809, 0x01},
 231         {0x80A, 0x61},
 232         {0x80B, 0x00},
 233         {0x80C, 0x01},
 234         {0x80D, 0x00},
 235         {0x80E, 0x00},
 236         {0x80F, 0x00},
 237         {0x810, 0x00},
 238         {0x811, 0x01},
 239         {0x812, 0x61},
 240         {0x813, 0x00},
 241         {0x814, 0x11},
 242         {0x815, 0x00},
 243         {0x816, 0x41},
 244         {0x817, 0x00},
 245         {0x818, 0x51},
 246         {0x819, 0x01},
 247         {0x81A, 0x1F},
 248         {0x81B, 0x00},
 249         {0x81C, 0x01},
 250         {0x81D, 0x00},
 251         {0x81E, 0x11},
 252         {0x81F, 0x00},
 253         {0x820, 0x41},
 254         {0x821, 0x00},
 255         {0x822, 0x51},
 256         {0x823, 0x00},
 257         {0x824, 0x00},
 258         {0x825, 0x00},
 259         {0x826, 0x47},
 260         {0x827, 0x01},
 261         {0x828, 0x4F},
 262         {0x829, 0x00},
 263         {0x82A, 0x00},
 264         {0x82B, 0x00},
 265         {0x82C, 0x30},
 266         {0x82D, 0x00},
 267         {0x82E, 0x40},
 268         {0x82F, 0x00},
 269         {0x830, 0xB3},
 270         {0x831, 0x00},
 271         {0x832, 0xE3},
 272         {0x833, 0x00},
 273         {0x834, 0x00},
 274         {0x835, 0x00},
 275         {0x836, 0x00},
 276         {0x837, 0x00},
 277         {0x838, 0x00},
 278         {0x839, 0x01},
 279         {0x83A, 0x61},
 280         {0x83B, 0x00},
 281         {0x83C, 0x01},
 282         {0x83D, 0x00},
 283         {0x83E, 0x00},
 284         {0x83F, 0x00},
 285         {0x840, 0x00},
 286         {0x841, 0x01},
 287         {0x842, 0x61},
 288         {0x843, 0x00},
 289         {0x844, 0x1D},
 290         {0x845, 0x00},
 291         {0x846, 0x00},
 292         {0x847, 0x00},
 293         {0x848, 0x00},
 294         {0x849, 0x01},
 295         {0x84A, 0x1F},
 296         {0x84B, 0x00},
 297         {0x84C, 0x05},
 298         {0x84D, 0x00},
 299         {0x84E, 0x19},
 300         {0x84F, 0x01},
 301         {0x850, 0x21},
 302         {0x851, 0x01},
 303         {0x852, 0x5D},
 304         {0x853, 0x00},
 305         {0x854, 0x00},
 306         {0x855, 0x00},
 307         {0x856, 0x19},
 308         {0x857, 0x01},
 309         {0x858, 0x21},
 310         {0x859, 0x00},
 311         {0x85A, 0x00},
 312         {0x85B, 0x00},
 313         {0x85C, 0x00},
 314         {0x85D, 0x00},
 315         {0x85E, 0x00},
 316         {0x85F, 0x00},
 317         {0x860, 0xB3},
 318         {0x861, 0x00},
 319         {0x862, 0xE3},
 320         {0x863, 0x00},
 321         {0x864, 0x00},
 322         {0x865, 0x00},
 323         {0x866, 0x00},
 324         {0x867, 0x00},
 325         {0x868, 0x00},
 326         {0x869, 0xE2},
 327         {0x86A, 0x00},
 328         {0x86B, 0x01},
 329         {0x86C, 0x06},
 330         {0x86D, 0x00},
 331         {0x86E, 0x00},
 332         {0x86F, 0x00},
 333         {0x870, 0x60},
 334         {0x871, 0x8C},
 335         {0x872, 0x10},
 336         {0x873, 0x00},
 337         {0x874, 0xE0},
 338         {0x875, 0x00},
 339         {0x876, 0x27},
 340         {0x877, 0x01},
 341         {0x878, 0x00},
 342         {0x879, 0x00},
 343         {0x87A, 0x00},
 344         {0x87B, 0x03},
 345         {0x87C, 0x00},
 346         {0x87D, 0x00},
 347         {0x87E, 0x00},
 348         {0x87F, 0x00},
 349         {0x880, 0x00},
 350         {0x881, 0x00},
 351         {0x882, 0x00},
 352         {0x883, 0x00},
 353         {0x884, 0x00},
 354         {0x885, 0x00},
 355         {0x886, 0xF8},
 356         {0x887, 0x00},
 357         {0x888, 0x03},
 358         {0x889, 0x00},
 359         {0x88A, 0x64},
 360         {0x88B, 0x00},
 361         {0x88C, 0x03},
 362         {0x88D, 0x00},
 363         {0x88E, 0xB1},
 364         {0x88F, 0x00},
 365         {0x890, 0x03},
 366         {0x891, 0x01},
 367         {0x892, 0x1D},
 368         {0x893, 0x00},
 369         {0x894, 0x03},
 370         {0x895, 0x01},
 371         {0x896, 0x4B},
 372         {0x897, 0x00},
 373         {0x898, 0xE5},
 374         {0x899, 0x00},
 375         {0x89A, 0x01},
 376         {0x89B, 0x00},
 377         {0x89C, 0x01},
 378         {0x89D, 0x04},
 379         {0x89E, 0xC8},
 380         {0x89F, 0x00},
 381         {0x8A0, 0x01},
 382         {0x8A1, 0x01},
 383         {0x8A2, 0x61},
 384         {0x8A3, 0x00},
 385         {0x8A4, 0x01},
 386         {0x8A5, 0x00},
 387         {0x8A6, 0x00},
 388         {0x8A7, 0x00},
 389         {0x8A8, 0x00},
 390         {0x8A9, 0x00},
 391         {0x8AA, 0x7F},
 392         {0x8AB, 0x03},
 393         {0x8AC, 0x00},
 394         {0x8AD, 0x00},
 395         {0x8AE, 0x00},
 396         {0x8AF, 0x00},
 397         {0x8B0, 0x00},
 398         {0x8B1, 0x00},
 399         {0x8B6, 0x00},
 400         {0x8B7, 0x01},
 401         {0x8B8, 0x00},
 402         {0x8B9, 0x00},
 403         {0x8BA, 0x02},
 404         {0x8BB, 0x00},
 405         {0x8BC, 0xFF},
 406         {0x8BD, 0x00},
 407         {0x8FE, 2},
 408 };
 409
 410 static const struct rj54n1_reg_val bank_10[] = {
 411         {0x10bf, 0x69}
 412 };
 413
 414 /* Clock dividers - these are default register values, divider = register + 1 */
 415 static const struct rj54n1_clock_div clk_div = {
 416         .ratio_tg       = 3 /* default: 5 */,
 417         .ratio_t        = 4 /* default: 1 */,
 418         .ratio_r        = 4 /* default: 0 */,
 419         .ratio_op       = 1 /* default: 5 */,
 420         .ratio_o        = 9 /* default: 0 */,
 421 };
 422
 423 static struct rj54n1 *to_rj54n1(const struct i2c_client *client)
 424 {
 425         return container_of(i2c_get_clientdata(client), struct rj54n1, subdev);
 426 }
 427
 428 static int reg_read(struct i2c_client *client, const u16 reg)
 429 {
 430         struct rj54n1 *rj54n1 = to_rj54n1(client);
 431         int ret;
 432
 433         /* set bank */
 434         if (rj54n1->bank != reg >> 8) {
 435                 dev_dbg(&client->dev, "[0x%x] = 0x%x\n", 0xff, reg >> 8);
 436                 ret = i2c_smbus_write_byte_data(client, 0xff, reg >> 8);
 437                 if (ret < 0)
 438                         return ret;
 439                 rj54n1->bank = reg >> 8;
 440         }
 441         return i2c_smbus_read_byte_data(client, reg & 0xff);
 442 }
 443
 444 static int reg_write(struct i2c_client *client, const u16 reg,
 445                      const u8 data)
 446 {
 447         struct rj54n1 *rj54n1 = to_rj54n1(client);
 448         int ret;
 449
 450         /* set bank */
 451         if (rj54n1->bank != reg >> 8) {
 452                 dev_dbg(&client->dev, "[0x%x] = 0x%x\n", 0xff, reg >> 8);
 453                 ret = i2c_smbus_write_byte_data(client, 0xff, reg >> 8);
 454                 if (ret < 0)
 455                         return ret;
 456                 rj54n1->bank = reg >> 8;
 457         }
 458         dev_dbg(&client->dev, "[0x%x] = 0x%x\n", reg & 0xff, data);
 459         return i2c_smbus_write_byte_data(client, reg & 0xff, data);
 460 }
 461
 462 static int reg_set(struct i2c_client *client, const u16 reg,
 463                    const u8 data, const u8 mask)
 464 {
 465         int ret;
 466
 467         ret = reg_read(client, reg);
 468         if (ret < 0)
 469                 return ret;
 470         return reg_write(client, reg, (ret & ~mask) | (data & mask));
 471 }
 472
 473 static int reg_write_multiple(struct i2c_client *client,
 474                               const struct rj54n1_reg_val *rv, const int n)
 475 {
 476         int i, ret;
 477
 478         for (i = 0; i < n; i++) {
 479                 ret = reg_write(client, rv->reg, rv->val);
 480                 if (ret < 0)
 481                         return ret;
 482                 rv++;
 483         }
 484
 485         return 0;
 486 }
 487
 488 static int rj54n1_enum_mbus_code(struct v4l2_subdev *sd,
 489                 struct v4l2_subdev_pad_config *cfg,
 490                 struct v4l2_subdev_mbus_code_enum *code)
 491 {
 492         if (code->pad || code->index >= ARRAY_SIZE(rj54n1_colour_fmts))
 493                 return -EINVAL;
 494
 495         code->code = rj54n1_colour_fmts[code->index].code;
 496         return 0;
 497 }
 498
 499 static int rj54n1_s_stream(struct v4l2_subdev *sd, int enable)
 500 {
 501         struct i2c_client *client = v4l2_get_subdevdata(sd);
 502
 503         /* Switch between preview and still shot modes */
 504         return reg_set(client, RJ54N1_STILL_CONTROL, (!enable) << 7, 0x80);
 505 }
 506
 507 static int rj54n1_set_rect(struct i2c_client *client,
 508                            u16 reg_x, u16 reg_y, u16 reg_xy,
 509                            u32 width, u32 height)
 510 {
 511         int ret;
 512
 513         ret = reg_write(client, reg_xy,
 514                         ((width >> 4) & 0x70) |
 515                         ((height >> 8) & 7));
 516
 517         if (!ret)
 518                 ret = reg_write(client, reg_x, width & 0xff);
 519         if (!ret)
 520                 ret = reg_write(client, reg_y, height & 0xff);
 521
 522         return ret;
 523 }
 524
 525 /*
 526  * Some commands, specifically certain initialisation sequences, require
 527  * a commit operation.
 528  */
 529 static int rj54n1_commit(struct i2c_client *client)
 530 {
 531         int ret = reg_write(client, RJ54N1_INIT_START, 1);
 532         msleep(10);
 533         if (!ret)
 534                 ret = reg_write(client, RJ54N1_INIT_START, 0);
 535         return ret;
 536 }
 537
 538 static int rj54n1_sensor_scale(struct v4l2_subdev *sd, s32 *in_w, s32 *in_h,
 539                                s32 *out_w, s32 *out_h);
 540
 541 static int rj54n1_s_crop(struct v4l2_subdev *sd, const struct v4l2_crop *a)
 542 {
 543         struct i2c_client *client = v4l2_get_subdevdata(sd);
 544         struct rj54n1 *rj54n1 = to_rj54n1(client);
 545         const struct v4l2_rect *rect = &a->c;
 546         int dummy = 0, output_w, output_h,
 547                 input_w = rect->width, input_h = rect->height;
 548         int ret;
 549
 550         /* arbitrary minimum width and height, edges unimportant */
 551         soc_camera_limit_side(&dummy, &input_w,
 552                      RJ54N1_COLUMN_SKIP, 8, RJ54N1_MAX_WIDTH);
 553
 554         soc_camera_limit_side(&dummy, &input_h,
 555                      RJ54N1_ROW_SKIP, 8, RJ54N1_MAX_HEIGHT);
 556
 557         output_w = (input_w * 1024 + rj54n1->resize / 2) / rj54n1->resize;
 558         output_h = (input_h * 1024 + rj54n1->resize / 2) / rj54n1->resize;
 559
 560         dev_dbg(&client->dev, "Scaling for %dx%d : %u = %dx%d\n",
 561                 input_w, input_h, rj54n1->resize, output_w, output_h);
 562
 563         ret = rj54n1_sensor_scale(sd, &input_w, &input_h, &output_w, &output_h);
 564         if (ret < 0)
 565                 return ret;
 566
 567         rj54n1->width           = output_w;
 568         rj54n1->height          = output_h;
 569         rj54n1->resize          = ret;
 570         rj54n1->rect.width      = input_w;
 571         rj54n1->rect.height     = input_h;
 572
 573         return 0;
 574 }
 575
 576 static int rj54n1_g_crop(struct v4l2_subdev *sd, struct v4l2_crop *a)
 577 {
 578         struct i2c_client *client = v4l2_get_subdevdata(sd);
 579         struct rj54n1 *rj54n1 = to_rj54n1(client);
 580
 581         a->c    = rj54n1->rect;
 582         a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 583
 584         return 0;
 585 }
 586
 587 static int rj54n1_cropcap(struct v4l2_subdev *sd, struct v4l2_cropcap *a)
 588 {
 589         a->bounds.left                  = RJ54N1_COLUMN_SKIP;
 590         a->bounds.top                   = RJ54N1_ROW_SKIP;
 591         a->bounds.width                 = RJ54N1_MAX_WIDTH;
 592         a->bounds.height                = RJ54N1_MAX_HEIGHT;
 593         a->defrect                      = a->bounds;
 594         a->type                         = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 595         a->pixelaspect.numerator        = 1;
 596         a->pixelaspect.denominator      = 1;
 597
 598         return 0;
 599 }
 600
 601 static int rj54n1_get_fmt(struct v4l2_subdev *sd,
 602                 struct v4l2_subdev_pad_config *cfg,
 603                 struct v4l2_subdev_format *format)
 604 {
 605         struct v4l2_mbus_framefmt *mf = &format->format;
 606         struct i2c_client *client = v4l2_get_subdevdata(sd);
 607         struct rj54n1 *rj54n1 = to_rj54n1(client);
 608
 609         if (format->pad)
 610                 return -EINVAL;
 611
 612         mf->code        = rj54n1->fmt->code;
 613         mf->colorspace  = rj54n1->fmt->colorspace;
 614         mf->field       = V4L2_FIELD_NONE;
 615         mf->width       = rj54n1->width;
 616         mf->height      = rj54n1->height;
 617
 618         return 0;
 619 }
 620
 621 /*
 622  * The actual geometry configuration routine. It scales the input window into
 623  * the output one, updates the window sizes and returns an error or the resize
 624  * coefficient on success. Note: we only use the "Fixed Scaling" on this camera.
 625  */
 626 static int rj54n1_sensor_scale(struct v4l2_subdev *sd, s32 *in_w, s32 *in_h,
 627                                s32 *out_w, s32 *out_h)
 628 {
 629         struct i2c_client *client = v4l2_get_subdevdata(sd);
 630         struct rj54n1 *rj54n1 = to_rj54n1(client);
 631         unsigned int skip, resize, input_w = *in_w, input_h = *in_h,
 632                 output_w = *out_w, output_h = *out_h;
 633         u16 inc_sel, wb_bit8, wb_left, wb_right, wb_top, wb_bottom;
 634         unsigned int peak, peak_50, peak_60;
 635         int ret;
 636
 637         /*
 638          * We have a problem with crops, where the window is larger than 512x384
 639          * and output window is larger than a half of the input one. In this
 640          * case we have to either reduce the input window to equal or below
 641          * 512x384 or the output window to equal or below 1/2 of the input.
 642          */
 643         if (output_w > max(512U, input_w / 2)) {
 644                 if (2 * output_w > RJ54N1_MAX_WIDTH) {
 645                         input_w = RJ54N1_MAX_WIDTH;
 646                         output_w = RJ54N1_MAX_WIDTH / 2;
 647                 } else {
 648                         input_w = output_w * 2;
 649                 }
 650
 651                 dev_dbg(&client->dev, "Adjusted output width: in %u, out %u\n",
 652                         input_w, output_w);
 653         }
 654
 655         if (output_h > max(384U, input_h / 2)) {
 656                 if (2 * output_h > RJ54N1_MAX_HEIGHT) {
 657                         input_h = RJ54N1_MAX_HEIGHT;
 658                         output_h = RJ54N1_MAX_HEIGHT / 2;
 659                 } else {
 660                         input_h = output_h * 2;
 661                 }
 662
 663                 dev_dbg(&client->dev, "Adjusted output height: in %u, out %u\n",
 664                         input_h, output_h);
 665         }
 666
 667         /* Idea: use the read mode for snapshots, handle separate geometries */
 668         ret = rj54n1_set_rect(client, RJ54N1_X_OUTPUT_SIZE_S_L,
 669                               RJ54N1_Y_OUTPUT_SIZE_S_L,
 670                               RJ54N1_XY_OUTPUT_SIZE_S_H, output_w, output_h);
 671         if (!ret)
 672                 ret = rj54n1_set_rect(client, RJ54N1_X_OUTPUT_SIZE_P_L,
 673                               RJ54N1_Y_OUTPUT_SIZE_P_L,
 674                               RJ54N1_XY_OUTPUT_SIZE_P_H, output_w, output_h);
 675
 676         if (ret < 0)
 677                 return ret;
 678
 679         if (output_w > input_w && output_h > input_h) {
 680                 input_w = output_w;
 681                 input_h = output_h;
 682
 683                 resize = 1024;
 684         } else {
 685                 unsigned int resize_x, resize_y;
 686                 resize_x = (input_w * 1024 + output_w / 2) / output_w;
 687                 resize_y = (input_h * 1024 + output_h / 2) / output_h;
 688
 689                 /* We want max(resize_x, resize_y), check if it still fits */
 690                 if (resize_x > resize_y &&
 691                     (output_h * resize_x + 512) / 1024 > RJ54N1_MAX_HEIGHT)
 692                         resize = (RJ54N1_MAX_HEIGHT * 1024 + output_h / 2) /
 693                                 output_h;
 694                 else if (resize_y > resize_x &&
 695                          (output_w * resize_y + 512) / 1024 > RJ54N1_MAX_WIDTH)
 696                         resize = (RJ54N1_MAX_WIDTH * 1024 + output_w / 2) /
 697                                 output_w;
 698                 else
 699                         resize = max(resize_x, resize_y);
 700
 701                 /* Prohibited value ranges */
 702                 switch (resize) {
 703                 case 2040 ... 2047:
 704                         resize = 2039;
 705                         break;
 706                 case 4080 ... 4095:
 707                         resize = 4079;
 708                         break;
 709                 case 8160 ... 8191:
 710                         resize = 8159;
 711                         break;
 712                 case 16320 ... 16384:
 713                         resize = 16319;
 714                 }
 715         }
 716
 717         /* Set scaling */
 718         ret = reg_write(client, RJ54N1_RESIZE_HOLD_L, resize & 0xff);
 719         if (!ret)
 720                 ret = reg_write(client, RJ54N1_RESIZE_HOLD_H, resize >> 8);
 721
 722         if (ret < 0)
 723                 return ret;
 724
 725         /*
 726          * Configure a skipping bitmask. The sensor will select a skipping value
 727          * among set bits automatically. This is very unclear in the datasheet
 728          * too. I was told, in this register one enables all skipping values,
 729          * that are required for a specific resize, and the camera selects
 730          * automatically, which ones to use. But it is unclear how to identify,
 731          * which cropping values are needed. Secondly, why don't we just set all
 732          * bits and let the camera choose? Would it increase processing time and
 733          * reduce the framerate? Using 0xfffc for INC_USE_SEL doesn't seem to
 734          * improve the image quality or stability for larger frames (see comment
 735          * above), but I didn't check the framerate.
 736          */
 737         skip = min(resize / 1024, 15U);
 738
 739         inc_sel = 1 << skip;
 740
 741         if (inc_sel <= 2)
 742                 inc_sel = 0xc;
 743         else if (resize & 1023 && skip < 15)
 744                 inc_sel |= 1 << (skip + 1);
 745
 746         ret = reg_write(client, RJ54N1_INC_USE_SEL_L, inc_sel & 0xfc);
 747         if (!ret)
 748                 ret = reg_write(client, RJ54N1_INC_USE_SEL_H, inc_sel >> 8);
 749
 750         if (!rj54n1->auto_wb) {
 751                 /* Auto white balance window */
 752                 wb_left   = output_w / 16;
 753                 wb_right  = (3 * output_w / 4 - 3) / 4;
 754                 wb_top    = output_h / 16;
 755                 wb_bottom = (3 * output_h / 4 - 3) / 4;
 756                 wb_bit8   = ((wb_left >> 2) & 0x40) | ((wb_top >> 4) & 0x10) |
 757                         ((wb_right >> 6) & 4) | ((wb_bottom >> 8) & 1);
 758
 759                 if (!ret)
 760                         ret = reg_write(client, RJ54N1_BIT8_WB, wb_bit8);
 761                 if (!ret)
 762                         ret = reg_write(client, RJ54N1_HCAPS_WB, wb_left);
 763                 if (!ret)
 764                         ret = reg_write(client, RJ54N1_VCAPS_WB, wb_top);
 765                 if (!ret)
 766                         ret = reg_write(client, RJ54N1_HCAPE_WB, wb_right);
 767                 if (!ret)
 768                         ret = reg_write(client, RJ54N1_VCAPE_WB, wb_bottom);
 769         }
 770
 771         /* Antiflicker */
 772         peak = 12 * RJ54N1_MAX_WIDTH * (1 << 14) * resize / rj54n1->tgclk_mhz /
 773                 10000;
 774         peak_50 = peak / 6;
 775         peak_60 = peak / 5;
 776
 777         if (!ret)
 778                 ret = reg_write(client, RJ54N1_PEAK_H,
 779                                 ((peak_50 >> 4) & 0xf0) | (peak_60 >> 8));
 780         if (!ret)
 781                 ret = reg_write(client, RJ54N1_PEAK_50, peak_50);
 782         if (!ret)
 783                 ret = reg_write(client, RJ54N1_PEAK_60, peak_60);
 784         if (!ret)
 785                 ret = reg_write(client, RJ54N1_PEAK_DIFF, peak / 150);
 786
 787         /* Start resizing */
 788         if (!ret)
 789                 ret = reg_write(client, RJ54N1_RESIZE_CONTROL,
 790                                 RESIZE_HOLD_SEL | RESIZE_GO | 1);
 791
 792         if (ret < 0)
 793                 return ret;
 794
 795         /* Constant taken from manufacturer's example */
 796         msleep(230);
 797
 798         ret = reg_write(client, RJ54N1_RESIZE_CONTROL, RESIZE_HOLD_SEL | 1);
 799         if (ret < 0)
 800                 return ret;
 801
 802         *in_w = (output_w * resize + 512) / 1024;
 803         *in_h = (output_h * resize + 512) / 1024;
 804         *out_w = output_w;
 805         *out_h = output_h;
 806
 807         dev_dbg(&client->dev, "Scaled for %dx%d : %u = %ux%u, skip %u\n",
 808                 *in_w, *in_h, resize, output_w, output_h, skip);
 809
 810         return resize;
 811 }
 812
 813 static int rj54n1_set_clock(struct i2c_client *client)
 814 {
 815         struct rj54n1 *rj54n1 = to_rj54n1(client);
 816         int ret;
 817
 818         /* Enable external clock */
 819         ret = reg_write(client, RJ54N1_RESET_STANDBY, E_EXCLK | SOFT_STDBY);
 820         /* Leave stand-by. Note: use this when implementing suspend / resume */
 821         if (!ret)
 822                 ret = reg_write(client, RJ54N1_RESET_STANDBY, E_EXCLK);
 823
 824         if (!ret)
 825                 ret = reg_write(client, RJ54N1_PLL_L, PLL_L);
 826         if (!ret)
 827                 ret = reg_write(client, RJ54N1_PLL_N, PLL_N);
 828
 829         /* TGCLK dividers */
 830         if (!ret)
 831                 ret = reg_write(client, RJ54N1_RATIO_TG,
 832                                 rj54n1->clk_div.ratio_tg);
 833         if (!ret)
 834                 ret = reg_write(client, RJ54N1_RATIO_T,
 835                                 rj54n1->clk_div.ratio_t);
 836         if (!ret)
 837                 ret = reg_write(client, RJ54N1_RATIO_R,
 838                                 rj54n1->clk_div.ratio_r);
 839
 840         /* Enable TGCLK & RAMP */
 841         if (!ret)
 842                 ret = reg_write(client, RJ54N1_RAMP_TGCLK_EN, 3);
 843
 844         /* Disable clock output */
 845         if (!ret)
 846                 ret = reg_write(client, RJ54N1_OCLK_DSP, 0);
 847
 848         /* Set divisors */
 849         if (!ret)
 850                 ret = reg_write(client, RJ54N1_RATIO_OP,
 851                                 rj54n1->clk_div.ratio_op);
 852         if (!ret)
 853                 ret = reg_write(client, RJ54N1_RATIO_O,
 854                                 rj54n1->clk_div.ratio_o);
 855
 856         /* Enable OCLK */
 857         if (!ret)
 858                 ret = reg_write(client, RJ54N1_OCLK_SEL_EN, 1);
 859
 860         /* Use PLL for Timing Generator, write 2 to reserved bits */
 861         if (!ret)
 862                 ret = reg_write(client, RJ54N1_TG_BYPASS, 2);
 863
 864         /* Take sensor out of reset */
 865         if (!ret)
 866                 ret = reg_write(client, RJ54N1_RESET_STANDBY,
 867                                 E_EXCLK | SEN_RSTX);
 868         /* Enable PLL */
 869         if (!ret)
 870                 ret = reg_write(client, RJ54N1_PLL_EN, 1);
 871
 872         /* Wait for PLL to stabilise */
 873         msleep(10);
 874
 875         /* Enable clock to frequency divider */
 876         if (!ret)
 877                 ret = reg_write(client, RJ54N1_CLK_RST, 1);
 878
 879         if (!ret)
 880                 ret = reg_read(client, RJ54N1_CLK_RST);
 881         if (ret != 1) {
 882                 dev_err(&client->dev,
 883                         "Resetting RJ54N1CB0C clock failed: %d!\n", ret);
 884                 return -EIO;
 885         }
 886
 887         /* Start the PLL */
 888         ret = reg_set(client, RJ54N1_OCLK_DSP, 1, 1);
 889
 890         /* Enable OCLK */
 891         if (!ret)
 892                 ret = reg_write(client, RJ54N1_OCLK_SEL_EN, 1);
 893
 894         return ret;
 895 }
 896
 897 static int rj54n1_reg_init(struct i2c_client *client)
 898 {
 899         struct rj54n1 *rj54n1 = to_rj54n1(client);
 900         int ret = rj54n1_set_clock(client);
 901
 902         if (!ret)
 903                 ret = reg_write_multiple(client, bank_7, ARRAY_SIZE(bank_7));
 904         if (!ret)
 905                 ret = reg_write_multiple(client, bank_10, ARRAY_SIZE(bank_10));
 906
 907         /* Set binning divisors */
 908         if (!ret)
 909                 ret = reg_write(client, RJ54N1_SCALE_1_2_LEV, 3 | (7 << 4));
 910         if (!ret)
 911                 ret = reg_write(client, RJ54N1_SCALE_4_LEV, 0xf);
 912
 913         /* Switch to fixed resize mode */
 914         if (!ret)
 915                 ret = reg_write(client, RJ54N1_RESIZE_CONTROL,
 916                                 RESIZE_HOLD_SEL | 1);
 917
 918         /* Set gain */
 919         if (!ret)
 920                 ret = reg_write(client, RJ54N1_Y_GAIN, 0x84);
 921
 922         /*
 923          * Mirror the image back: default is upside down and left-to-right...
 924          * Set manual preview / still shot switching
 925          */
 926         if (!ret)
 927                 ret = reg_write(client, RJ54N1_MIRROR_STILL_MODE, 0x27);
 928
 929         if (!ret)
 930                 ret = reg_write_multiple(client, bank_4, ARRAY_SIZE(bank_4));
 931
 932         /* Auto exposure area */
 933         if (!ret)
 934                 ret = reg_write(client, RJ54N1_EXPOSURE_CONTROL, 0x80);
 935         /* Check current auto WB config */
 936         if (!ret)
 937                 ret = reg_read(client, RJ54N1_WB_SEL_WEIGHT_I);
 938         if (ret >= 0) {
 939                 rj54n1->auto_wb = ret & 0x80;
 940                 ret = reg_write_multiple(client, bank_5, ARRAY_SIZE(bank_5));
 941         }
 942         if (!ret)
 943                 ret = reg_write_multiple(client, bank_8, ARRAY_SIZE(bank_8));
 944
 945         if (!ret)
 946                 ret = reg_write(client, RJ54N1_RESET_STANDBY,
 947                                 E_EXCLK | DSP_RSTX | SEN_RSTX);
 948
 949         /* Commit init */
 950         if (!ret)
 951                 ret = rj54n1_commit(client);
 952
 953         /* Take DSP, TG, sensor out of reset */
 954         if (!ret)
 955                 ret = reg_write(client, RJ54N1_RESET_STANDBY,
 956                                 E_EXCLK | DSP_RSTX | TG_RSTX | SEN_RSTX);
 957
 958         /* Start register update? Same register as 0x?FE in many bank_* sets */
 959         if (!ret)
 960                 ret = reg_write(client, RJ54N1_FWFLG, 2);
 961
 962         /* Constant taken from manufacturer's example */
 963         msleep(700);
 964
 965         return ret;
 966 }
 967
 968 static int rj54n1_set_fmt(struct v4l2_subdev *sd,
 969                 struct v4l2_subdev_pad_config *cfg,
 970                 struct v4l2_subdev_format *format)
 971 {
 972         struct v4l2_mbus_framefmt *mf = &format->format;
 973         struct i2c_client *client = v4l2_get_subdevdata(sd);
 974         struct rj54n1 *rj54n1 = to_rj54n1(client);
 975         const struct rj54n1_datafmt *fmt;
 976         int output_w, output_h, max_w, max_h,
 977                 input_w = rj54n1->rect.width, input_h = rj54n1->rect.height;
 978         int align = mf->code == MEDIA_BUS_FMT_SBGGR10_1X10 ||
 979                 mf->code == MEDIA_BUS_FMT_SBGGR10_2X8_PADHI_BE ||
 980                 mf->code == MEDIA_BUS_FMT_SBGGR10_2X8_PADLO_BE ||
 981                 mf->code == MEDIA_BUS_FMT_SBGGR10_2X8_PADHI_LE ||
 982                 mf->code == MEDIA_BUS_FMT_SBGGR10_2X8_PADLO_LE;
 983         int ret;
 984
 985         if (format->pad)
 986                 return -EINVAL;
 987
 988         dev_dbg(&client->dev, "%s: code = %d, width = %u, height = %u\n",
 989                 __func__, mf->code, mf->width, mf->height);
 990
 991         fmt = rj54n1_find_datafmt(mf->code, rj54n1_colour_fmts,
 992                                   ARRAY_SIZE(rj54n1_colour_fmts));
 993         if (!fmt) {
 994                 fmt = rj54n1->fmt;
 995                 mf->code = fmt->code;
 996         }
 997
 998         mf->field       = V4L2_FIELD_NONE;
 999         mf->colorspace  = fmt->colorspace;
1000
1001         v4l_bound_align_image(&mf->width, 112, RJ54N1_MAX_WIDTH, align,
1002                               &mf->height, 84, RJ54N1_MAX_HEIGHT, align, 0);
1003
1004         if (format->which == V4L2_SUBDEV_FORMAT_TRY) {
1005                 cfg->try_fmt = *mf;
1006                 return 0;
1007         }
1008
1009         /*
1010          * Verify if the sensor has just been powered on. TODO: replace this
1011          * with proper PM, when a suitable API is available.
1012          */
1013         ret = reg_read(client, RJ54N1_RESET_STANDBY);
1014         if (ret < 0)
1015                 return ret;
1016
1017         if (!(ret & E_EXCLK)) {
1018                 ret = rj54n1_reg_init(client);
1019                 if (ret < 0)
1020                         return ret;
1021         }
1022
1023         /* RA_SEL_UL is only relevant for raw modes, ignored otherwise. */
1024         switch (mf->code) {
1025         case MEDIA_BUS_FMT_YUYV8_2X8:
1026                 ret = reg_write(client, RJ54N1_OUT_SEL, 0);
1027                 if (!ret)
1028                         ret = reg_set(client, RJ54N1_BYTE_SWAP, 8, 8);
1029                 break;
1030         case MEDIA_BUS_FMT_YVYU8_2X8:
1031                 ret = reg_write(client, RJ54N1_OUT_SEL, 0);
1032                 if (!ret)
1033                         ret = reg_set(client, RJ54N1_BYTE_SWAP, 0, 8);
1034                 break;
1035         case MEDIA_BUS_FMT_RGB565_2X8_LE:
1036                 ret = reg_write(client, RJ54N1_OUT_SEL, 0x11);
1037                 if (!ret)
1038                         ret = reg_set(client, RJ54N1_BYTE_SWAP, 8, 8);
1039                 break;
1040         case MEDIA_BUS_FMT_RGB565_2X8_BE:
1041                 ret = reg_write(client, RJ54N1_OUT_SEL, 0x11);
1042                 if (!ret)
1043                         ret = reg_set(client, RJ54N1_BYTE_SWAP, 0, 8);
1044                 break;
1045         case MEDIA_BUS_FMT_SBGGR10_2X8_PADLO_LE:
1046                 ret = reg_write(client, RJ54N1_OUT_SEL, 4);
1047                 if (!ret)
1048                         ret = reg_set(client, RJ54N1_BYTE_SWAP, 8, 8);
1049                 if (!ret)
1050                         ret = reg_write(client, RJ54N1_RA_SEL_UL, 0);
1051                 break;
1052         case MEDIA_BUS_FMT_SBGGR10_2X8_PADHI_LE:
1053                 ret = reg_write(client, RJ54N1_OUT_SEL, 4);
1054                 if (!ret)
1055                         ret = reg_set(client, RJ54N1_BYTE_SWAP, 8, 8);
1056                 if (!ret)
1057                         ret = reg_write(client, RJ54N1_RA_SEL_UL, 8);
1058                 break;
1059         case MEDIA_BUS_FMT_SBGGR10_2X8_PADLO_BE:
1060                 ret = reg_write(client, RJ54N1_OUT_SEL, 4);
1061                 if (!ret)
1062                         ret = reg_set(client, RJ54N1_BYTE_SWAP, 0, 8);
1063                 if (!ret)
1064                         ret = reg_write(client, RJ54N1_RA_SEL_UL, 0);
1065                 break;
1066         case MEDIA_BUS_FMT_SBGGR10_2X8_PADHI_BE:
1067                 ret = reg_write(client, RJ54N1_OUT_SEL, 4);
1068                 if (!ret)
1069                         ret = reg_set(client, RJ54N1_BYTE_SWAP, 0, 8);
1070                 if (!ret)
1071                         ret = reg_write(client, RJ54N1_RA_SEL_UL, 8);
1072                 break;
1073         case MEDIA_BUS_FMT_SBGGR10_1X10:
1074                 ret = reg_write(client, RJ54N1_OUT_SEL, 5);
1075                 break;
1076         default:
1077                 ret = -EINVAL;
1078         }
1079
1080         /* Special case: a raw mode with 10 bits of data per clock tick */
1081         if (!ret)
1082                 ret = reg_set(client, RJ54N1_OCLK_SEL_EN,
1083                               (mf->code == MEDIA_BUS_FMT_SBGGR10_1X10) << 1, 2);
1084
1085         if (ret < 0)
1086                 return ret;
1087
1088         /* Supported scales 1:1 >= scale > 1:16 */
1089         max_w = mf->width * (16 * 1024 - 1) / 1024;
1090         if (input_w > max_w)
1091                 input_w = max_w;
1092         max_h = mf->height * (16 * 1024 - 1) / 1024;
1093         if (input_h > max_h)
1094                 input_h = max_h;
1095
1096         output_w = mf->width;
1097         output_h = mf->height;
1098
1099         ret = rj54n1_sensor_scale(sd, &input_w, &input_h, &output_w, &output_h);
1100         if (ret < 0)
1101                 return ret;
1102
1103         fmt = rj54n1_find_datafmt(mf->code, rj54n1_colour_fmts,
1104                                   ARRAY_SIZE(rj54n1_colour_fmts));
1105
1106         rj54n1->fmt             = fmt;
1107         rj54n1->resize          = ret;
1108         rj54n1->rect.width      = input_w;
1109         rj54n1->rect.height     = input_h;
1110         rj54n1->width           = output_w;
1111         rj54n1->height          = output_h;
1112
1113         mf->width               = output_w;
1114         mf->height              = output_h;
1115         mf->field               = V4L2_FIELD_NONE;
1116         mf->colorspace          = fmt->colorspace;
1117
1118         return 0;
1119 }
1120
1121 #ifdef CONFIG_VIDEO_ADV_DEBUG
1122 static int rj54n1_g_register(struct v4l2_subdev *sd,
1123                              struct v4l2_dbg_register *reg)
1124 {
1125         struct i2c_client *client = v4l2_get_subdevdata(sd);
1126
1127         if (reg->reg < 0x400 || reg->reg > 0x1fff)
1128                 /* Registers > 0x0800 are only available from Sharp support */
1129                 return -EINVAL;
1130
1131         reg->size = 1;
1132         reg->val = reg_read(client, reg->reg);
1133
1134         if (reg->val > 0xff)
1135                 return -EIO;
1136
1137         return 0;
1138 }
1139
1140 static int rj54n1_s_register(struct v4l2_subdev *sd,
1141                              const struct v4l2_dbg_register *reg)
1142 {
1143         struct i2c_client *client = v4l2_get_subdevdata(sd);
1144
1145         if (reg->reg < 0x400 || reg->reg > 0x1fff)
1146                 /* Registers >= 0x0800 are only available from Sharp support */
1147                 return -EINVAL;
1148
1149         if (reg_write(client, reg->reg, reg->val) < 0)
1150                 return -EIO;
1151
1152         return 0;
1153 }
1154 #endif
1155
1156 static int rj54n1_s_power(struct v4l2_subdev *sd, int on)
1157 {
1158         struct i2c_client *client = v4l2_get_subdevdata(sd);
1159         struct soc_camera_subdev_desc *ssdd = soc_camera_i2c_to_desc(client);
1160         struct rj54n1 *rj54n1 = to_rj54n1(client);
1161
1162         return soc_camera_set_power(&client->dev, ssdd, rj54n1->clk, on);
1163 }
1164
1165 static int rj54n1_s_ctrl(struct v4l2_ctrl *ctrl)
1166 {
1167         struct rj54n1 *rj54n1 = container_of(ctrl->handler, struct rj54n1, hdl);
1168         struct v4l2_subdev *sd = &rj54n1->subdev;
1169         struct i2c_client *client = v4l2_get_subdevdata(sd);
1170         int data;
1171
1172         switch (ctrl->id) {
1173         case V4L2_CID_VFLIP:
1174                 if (ctrl->val)
1175                         data = reg_set(client, RJ54N1_MIRROR_STILL_MODE, 0, 1);
1176                 else
1177                         data = reg_set(client, RJ54N1_MIRROR_STILL_MODE, 1, 1);
1178                 if (data < 0)
1179                         return -EIO;
1180                 return 0;
1181         case V4L2_CID_HFLIP:
1182                 if (ctrl->val)
1183                         data = reg_set(client, RJ54N1_MIRROR_STILL_MODE, 0, 2);
1184                 else
1185                         data = reg_set(client, RJ54N1_MIRROR_STILL_MODE, 2, 2);
1186                 if (data < 0)
1187                         return -EIO;
1188                 return 0;
1189         case V4L2_CID_GAIN:
1190                 if (reg_write(client, RJ54N1_Y_GAIN, ctrl->val * 2) < 0)
1191                         return -EIO;
1192                 return 0;
1193         case V4L2_CID_AUTO_WHITE_BALANCE:
1194                 /* Auto WB area - whole image */
1195                 if (reg_set(client, RJ54N1_WB_SEL_WEIGHT_I, ctrl->val << 7,
1196                             0x80) < 0)
1197                         return -EIO;
1198                 rj54n1->auto_wb = ctrl->val;
1199                 return 0;
1200         }
1201
1202         return -EINVAL;
1203 }
1204
1205 static const struct v4l2_ctrl_ops rj54n1_ctrl_ops = {
1206         .s_ctrl = rj54n1_s_ctrl,
1207 };
1208
1209 static struct v4l2_subdev_core_ops rj54n1_subdev_core_ops = {
1210 #ifdef CONFIG_VIDEO_ADV_DEBUG
1211         .g_register     = rj54n1_g_register,
1212         .s_register     = rj54n1_s_register,
1213 #endif
1214         .s_power        = rj54n1_s_power,
1215 };
1216
1217 static int rj54n1_g_mbus_config(struct v4l2_subdev *sd,
1218                                 struct v4l2_mbus_config *cfg)
1219 {
1220         struct i2c_client *client = v4l2_get_subdevdata(sd);
1221         struct soc_camera_subdev_desc *ssdd = soc_camera_i2c_to_desc(client);
1222
1223         cfg->flags =
1224                 V4L2_MBUS_PCLK_SAMPLE_RISING | V4L2_MBUS_PCLK_SAMPLE_FALLING |
1225                 V4L2_MBUS_MASTER | V4L2_MBUS_DATA_ACTIVE_HIGH |
1226                 V4L2_MBUS_HSYNC_ACTIVE_HIGH | V4L2_MBUS_VSYNC_ACTIVE_HIGH;
1227         cfg->type = V4L2_MBUS_PARALLEL;
1228         cfg->flags = soc_camera_apply_board_flags(ssdd, cfg);
1229
1230         return 0;
1231 }
1232
1233 static int rj54n1_s_mbus_config(struct v4l2_subdev *sd,
1234                                 const struct v4l2_mbus_config *cfg)
1235 {
1236         struct i2c_client *client = v4l2_get_subdevdata(sd);
1237         struct soc_camera_subdev_desc *ssdd = soc_camera_i2c_to_desc(client);
1238
1239         /* Figures 2.5-1 to 2.5-3 - default falling pixclk edge */
1240         if (soc_camera_apply_board_flags(ssdd, cfg) &
1241             V4L2_MBUS_PCLK_SAMPLE_RISING)
1242                 return reg_write(client, RJ54N1_OUT_SIGPO, 1 << 4);
1243         else
1244                 return reg_write(client, RJ54N1_OUT_SIGPO, 0);
1245 }
1246
1247 static struct v4l2_subdev_video_ops rj54n1_subdev_video_ops = {
1248         .s_stream       = rj54n1_s_stream,
1249         .g_crop         = rj54n1_g_crop,
1250         .s_crop         = rj54n1_s_crop,
1251         .cropcap        = rj54n1_cropcap,
1252         .g_mbus_config  = rj54n1_g_mbus_config,
1253         .s_mbus_config  = rj54n1_s_mbus_config,
1254 };
1255
1256 static const struct v4l2_subdev_pad_ops rj54n1_subdev_pad_ops = {
1257         .enum_mbus_code = rj54n1_enum_mbus_code,
1258         .get_fmt        = rj54n1_get_fmt,
1259         .set_fmt        = rj54n1_set_fmt,
1260 };
1261
1262 static struct v4l2_subdev_ops rj54n1_subdev_ops = {
1263         .core   = &rj54n1_subdev_core_ops,
1264         .video  = &rj54n1_subdev_video_ops,
1265         .pad    = &rj54n1_subdev_pad_ops,
1266 };
1267
1268 /*
1269  * Interface active, can use i2c. If it fails, it can indeed mean, that
1270  * this wasn't our capture interface, so, we wait for the right one
1271  */
1272 static int rj54n1_video_probe(struct i2c_client *client,
1273                               struct rj54n1_pdata *priv)
1274 {
1275         struct rj54n1 *rj54n1 = to_rj54n1(client);
1276         int data1, data2;
1277         int ret;
1278
1279         ret = rj54n1_s_power(&rj54n1->subdev, 1);
1280         if (ret < 0)
1281                 return ret;
1282
1283         /* Read out the chip version register */
1284         data1 = reg_read(client, RJ54N1_DEV_CODE);
1285         data2 = reg_read(client, RJ54N1_DEV_CODE2);
1286
1287         if (data1 != 0x51 || data2 != 0x10) {
1288                 ret = -ENODEV;
1289                 dev_info(&client->dev, "No RJ54N1CB0C found, read 0x%x:0x%x\n",
1290                          data1, data2);
1291                 goto done;
1292         }
1293
1294         /* Configure IOCTL polarity from the platform data: 0 or 1 << 7. */
1295         ret = reg_write(client, RJ54N1_IOC, priv->ioctl_high << 7);
1296         if (ret < 0)
1297                 goto done;
1298
1299         dev_info(&client->dev, "Detected a RJ54N1CB0C chip ID 0x%x:0x%x\n",
1300                  data1, data2);
1301
1302         ret = v4l2_ctrl_handler_setup(&rj54n1->hdl);
1303
1304 done:
1305         rj54n1_s_power(&rj54n1->subdev, 0);
1306         return ret;
1307 }
1308
1309 static int rj54n1_probe(struct i2c_client *client,
1310                         const struct i2c_device_id *did)
1311 {
1312         struct rj54n1 *rj54n1;
1313         struct soc_camera_subdev_desc *ssdd = soc_camera_i2c_to_desc(client);
1314         struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent);
1315         struct rj54n1_pdata *rj54n1_priv;
1316         int ret;
1317
1318         if (!ssdd || !ssdd->drv_priv) {
1319                 dev_err(&client->dev, "RJ54N1CB0C: missing platform data!\n");
1320                 return -EINVAL;
1321         }
1322
1323         rj54n1_priv = ssdd->drv_priv;
1324
1325         if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) {
1326                 dev_warn(&adapter->dev,
1327                          "I2C-Adapter doesn't support I2C_FUNC_SMBUS_BYTE\n");
1328                 return -EIO;
1329         }
1330
1331         rj54n1 = devm_kzalloc(&client->dev, sizeof(struct rj54n1), GFP_KERNEL);
1332         if (!rj54n1)
1333                 return -ENOMEM;
1334
1335         v4l2_i2c_subdev_init(&rj54n1->subdev, client, &rj54n1_subdev_ops);
1336         v4l2_ctrl_handler_init(&rj54n1->hdl, 4);
1337         v4l2_ctrl_new_std(&rj54n1->hdl, &rj54n1_ctrl_ops,
1338                         V4L2_CID_VFLIP, 0, 1, 1, 0);
1339         v4l2_ctrl_new_std(&rj54n1->hdl, &rj54n1_ctrl_ops,
1340                         V4L2_CID_HFLIP, 0, 1, 1, 0);
1341         v4l2_ctrl_new_std(&rj54n1->hdl, &rj54n1_ctrl_ops,
1342                         V4L2_CID_GAIN, 0, 127, 1, 66);
1343         v4l2_ctrl_new_std(&rj54n1->hdl, &rj54n1_ctrl_ops,
1344                         V4L2_CID_AUTO_WHITE_BALANCE, 0, 1, 1, 1);
1345         rj54n1->subdev.ctrl_handler = &rj54n1->hdl;
1346         if (rj54n1->hdl.error)
1347                 return rj54n1->hdl.error;
1348
1349         rj54n1->clk_div         = clk_div;
1350         rj54n1->rect.left       = RJ54N1_COLUMN_SKIP;
1351         rj54n1->rect.top        = RJ54N1_ROW_SKIP;
1352         rj54n1->rect.width      = RJ54N1_MAX_WIDTH;
1353         rj54n1->rect.height     = RJ54N1_MAX_HEIGHT;
1354         rj54n1->width           = RJ54N1_MAX_WIDTH;
1355         rj54n1->height          = RJ54N1_MAX_HEIGHT;
1356         rj54n1->fmt             = &rj54n1_colour_fmts[0];
1357         rj54n1->resize          = 1024;
1358         rj54n1->tgclk_mhz       = (rj54n1_priv->mclk_freq / PLL_L * PLL_N) /
1359                 (clk_div.ratio_tg + 1) / (clk_div.ratio_t + 1);
1360
1361         rj54n1->clk = v4l2_clk_get(&client->dev, "mclk");
1362         if (IS_ERR(rj54n1->clk)) {
1363                 ret = PTR_ERR(rj54n1->clk);
1364                 goto eclkget;
1365         }
1366
1367         ret = rj54n1_video_probe(client, rj54n1_priv);
1368         if (ret < 0) {
1369                 v4l2_clk_put(rj54n1->clk);
1370 eclkget:
1371                 v4l2_ctrl_handler_free(&rj54n1->hdl);
1372         }
1373
1374         return ret;
1375 }
1376
1377 static int rj54n1_remove(struct i2c_client *client)
1378 {
1379         struct rj54n1 *rj54n1 = to_rj54n1(client);
1380         struct soc_camera_subdev_desc *ssdd = soc_camera_i2c_to_desc(client);
1381
1382         v4l2_clk_put(rj54n1->clk);
1383         v4l2_device_unregister_subdev(&rj54n1->subdev);
1384         if (ssdd->free_bus)
1385                 ssdd->free_bus(ssdd);
1386         v4l2_ctrl_handler_free(&rj54n1->hdl);
1387
1388         return 0;
1389 }
1390
1391 static const struct i2c_device_id rj54n1_id[] = {
1392         { "rj54n1cb0c", 0 },
1393         { }
1394 };
1395 MODULE_DEVICE_TABLE(i2c, rj54n1_id);
1396
1397 static struct i2c_driver rj54n1_i2c_driver = {
1398         .driver = {
1399                 .name = "rj54n1cb0c",
1400         },
1401         .probe          = rj54n1_probe,
1402         .remove         = rj54n1_remove,
1403         .id_table       = rj54n1_id,
1404 };
1405
1406 module_i2c_driver(rj54n1_i2c_driver);
1407
1408 MODULE_DESCRIPTION("Sharp RJ54N1CB0C Camera driver");
1409 MODULE_AUTHOR("Guennadi Liakhovetski <g.liakhovetski@gmx.de>");
1410 MODULE_LICENSE("GPL v2");