drivers/media/video/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-subdev.h>
  21 #include <media/v4l2-chip-ident.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         enum v4l2_mbus_pixelcode        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         enum v4l2_mbus_pixelcode 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         {V4L2_MBUS_FMT_YUYV8_2X8, V4L2_COLORSPACE_JPEG},
 133         {V4L2_MBUS_FMT_YVYU8_2X8, V4L2_COLORSPACE_JPEG},
 134         {V4L2_MBUS_FMT_RGB565_2X8_LE, V4L2_COLORSPACE_SRGB},
 135         {V4L2_MBUS_FMT_RGB565_2X8_BE, V4L2_COLORSPACE_SRGB},
 136         {V4L2_MBUS_FMT_SBGGR10_2X8_PADHI_LE, V4L2_COLORSPACE_SRGB},
 137         {V4L2_MBUS_FMT_SBGGR10_2X8_PADLO_LE, V4L2_COLORSPACE_SRGB},
 138         {V4L2_MBUS_FMT_SBGGR10_2X8_PADHI_BE, V4L2_COLORSPACE_SRGB},
 139         {V4L2_MBUS_FMT_SBGGR10_2X8_PADLO_BE, V4L2_COLORSPACE_SRGB},
 140         {V4L2_MBUS_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 rj54n1_clock_div clk_div;
 155         const struct rj54n1_datafmt *fmt;
 156         struct v4l2_rect rect;  /* Sensor window */
 157         unsigned int tgclk_mhz;
 158         bool auto_wb;
 159         unsigned short width;   /* Output window */
 160         unsigned short height;
 161         unsigned short resize;  /* Sensor * 1024 / resize = Output */
 162         unsigned short scale;
 163         u8 bank;
 164 };
 165
 166 struct rj54n1_reg_val {
 167         u16 reg;
 168         u8 val;
 169 };
 170
 171 static const struct rj54n1_reg_val bank_4[] = {
 172         {0x417, 0},
 173         {0x42c, 0},
 174         {0x42d, 0xf0},
 175         {0x42e, 0},
 176         {0x42f, 0x50},
 177         {0x430, 0xf5},
 178         {0x431, 0x16},
 179         {0x432, 0x20},
 180         {0x433, 0},
 181         {0x434, 0xc8},
 182         {0x43c, 8},
 183         {0x43e, 0x90},
 184         {0x445, 0x83},
 185         {0x4ba, 0x58},
 186         {0x4bb, 4},
 187         {0x4bc, 0x20},
 188         {0x4db, 4},
 189         {0x4fe, 2},
 190 };
 191
 192 static const struct rj54n1_reg_val bank_5[] = {
 193         {0x514, 0},
 194         {0x516, 0},
 195         {0x518, 0},
 196         {0x51a, 0},
 197         {0x51d, 0xff},
 198         {0x56f, 0x28},
 199         {0x575, 0x40},
 200         {0x5bc, 0x48},
 201         {0x5c1, 6},
 202         {0x5e5, 0x11},
 203         {0x5e6, 0x43},
 204         {0x5e7, 0x33},
 205         {0x5e8, 0x21},
 206         {0x5e9, 0x30},
 207         {0x5ea, 0x0},
 208         {0x5eb, 0xa5},
 209         {0x5ec, 0xff},
 210         {0x5fe, 2},
 211 };
 212
 213 static const struct rj54n1_reg_val bank_7[] = {
 214         {0x70a, 0},
 215         {0x714, 0xff},
 216         {0x715, 0xff},
 217         {0x716, 0x1f},
 218         {0x7FE, 2},
 219 };
 220
 221 static const struct rj54n1_reg_val bank_8[] = {
 222         {0x800, 0x00},
 223         {0x801, 0x01},
 224         {0x802, 0x61},
 225         {0x805, 0x00},
 226         {0x806, 0x00},
 227         {0x807, 0x00},
 228         {0x808, 0x00},
 229         {0x809, 0x01},
 230         {0x80A, 0x61},
 231         {0x80B, 0x00},
 232         {0x80C, 0x01},
 233         {0x80D, 0x00},
 234         {0x80E, 0x00},
 235         {0x80F, 0x00},
 236         {0x810, 0x00},
 237         {0x811, 0x01},
 238         {0x812, 0x61},
 239         {0x813, 0x00},
 240         {0x814, 0x11},
 241         {0x815, 0x00},
 242         {0x816, 0x41},
 243         {0x817, 0x00},
 244         {0x818, 0x51},
 245         {0x819, 0x01},
 246         {0x81A, 0x1F},
 247         {0x81B, 0x00},
 248         {0x81C, 0x01},
 249         {0x81D, 0x00},
 250         {0x81E, 0x11},
 251         {0x81F, 0x00},
 252         {0x820, 0x41},
 253         {0x821, 0x00},
 254         {0x822, 0x51},
 255         {0x823, 0x00},
 256         {0x824, 0x00},
 257         {0x825, 0x00},
 258         {0x826, 0x47},
 259         {0x827, 0x01},
 260         {0x828, 0x4F},
 261         {0x829, 0x00},
 262         {0x82A, 0x00},
 263         {0x82B, 0x00},
 264         {0x82C, 0x30},
 265         {0x82D, 0x00},
 266         {0x82E, 0x40},
 267         {0x82F, 0x00},
 268         {0x830, 0xB3},
 269         {0x831, 0x00},
 270         {0x832, 0xE3},
 271         {0x833, 0x00},
 272         {0x834, 0x00},
 273         {0x835, 0x00},
 274         {0x836, 0x00},
 275         {0x837, 0x00},
 276         {0x838, 0x00},
 277         {0x839, 0x01},
 278         {0x83A, 0x61},
 279         {0x83B, 0x00},
 280         {0x83C, 0x01},
 281         {0x83D, 0x00},
 282         {0x83E, 0x00},
 283         {0x83F, 0x00},
 284         {0x840, 0x00},
 285         {0x841, 0x01},
 286         {0x842, 0x61},
 287         {0x843, 0x00},
 288         {0x844, 0x1D},
 289         {0x845, 0x00},
 290         {0x846, 0x00},
 291         {0x847, 0x00},
 292         {0x848, 0x00},
 293         {0x849, 0x01},
 294         {0x84A, 0x1F},
 295         {0x84B, 0x00},
 296         {0x84C, 0x05},
 297         {0x84D, 0x00},
 298         {0x84E, 0x19},
 299         {0x84F, 0x01},
 300         {0x850, 0x21},
 301         {0x851, 0x01},
 302         {0x852, 0x5D},
 303         {0x853, 0x00},
 304         {0x854, 0x00},
 305         {0x855, 0x00},
 306         {0x856, 0x19},
 307         {0x857, 0x01},
 308         {0x858, 0x21},
 309         {0x859, 0x00},
 310         {0x85A, 0x00},
 311         {0x85B, 0x00},
 312         {0x85C, 0x00},
 313         {0x85D, 0x00},
 314         {0x85E, 0x00},
 315         {0x85F, 0x00},
 316         {0x860, 0xB3},
 317         {0x861, 0x00},
 318         {0x862, 0xE3},
 319         {0x863, 0x00},
 320         {0x864, 0x00},
 321         {0x865, 0x00},
 322         {0x866, 0x00},
 323         {0x867, 0x00},
 324         {0x868, 0x00},
 325         {0x869, 0xE2},
 326         {0x86A, 0x00},
 327         {0x86B, 0x01},
 328         {0x86C, 0x06},
 329         {0x86D, 0x00},
 330         {0x86E, 0x00},
 331         {0x86F, 0x00},
 332         {0x870, 0x60},
 333         {0x871, 0x8C},
 334         {0x872, 0x10},
 335         {0x873, 0x00},
 336         {0x874, 0xE0},
 337         {0x875, 0x00},
 338         {0x876, 0x27},
 339         {0x877, 0x01},
 340         {0x878, 0x00},
 341         {0x879, 0x00},
 342         {0x87A, 0x00},
 343         {0x87B, 0x03},
 344         {0x87C, 0x00},
 345         {0x87D, 0x00},
 346         {0x87E, 0x00},
 347         {0x87F, 0x00},
 348         {0x880, 0x00},
 349         {0x881, 0x00},
 350         {0x882, 0x00},
 351         {0x883, 0x00},
 352         {0x884, 0x00},
 353         {0x885, 0x00},
 354         {0x886, 0xF8},
 355         {0x887, 0x00},
 356         {0x888, 0x03},
 357         {0x889, 0x00},
 358         {0x88A, 0x64},
 359         {0x88B, 0x00},
 360         {0x88C, 0x03},
 361         {0x88D, 0x00},
 362         {0x88E, 0xB1},
 363         {0x88F, 0x00},
 364         {0x890, 0x03},
 365         {0x891, 0x01},
 366         {0x892, 0x1D},
 367         {0x893, 0x00},
 368         {0x894, 0x03},
 369         {0x895, 0x01},
 370         {0x896, 0x4B},
 371         {0x897, 0x00},
 372         {0x898, 0xE5},
 373         {0x899, 0x00},
 374         {0x89A, 0x01},
 375         {0x89B, 0x00},
 376         {0x89C, 0x01},
 377         {0x89D, 0x04},
 378         {0x89E, 0xC8},
 379         {0x89F, 0x00},
 380         {0x8A0, 0x01},
 381         {0x8A1, 0x01},
 382         {0x8A2, 0x61},
 383         {0x8A3, 0x00},
 384         {0x8A4, 0x01},
 385         {0x8A5, 0x00},
 386         {0x8A6, 0x00},
 387         {0x8A7, 0x00},
 388         {0x8A8, 0x00},
 389         {0x8A9, 0x00},
 390         {0x8AA, 0x7F},
 391         {0x8AB, 0x03},
 392         {0x8AC, 0x00},
 393         {0x8AD, 0x00},
 394         {0x8AE, 0x00},
 395         {0x8AF, 0x00},
 396         {0x8B0, 0x00},
 397         {0x8B1, 0x00},
 398         {0x8B6, 0x00},
 399         {0x8B7, 0x01},
 400         {0x8B8, 0x00},
 401         {0x8B9, 0x00},
 402         {0x8BA, 0x02},
 403         {0x8BB, 0x00},
 404         {0x8BC, 0xFF},
 405         {0x8BD, 0x00},
 406         {0x8FE, 2},
 407 };
 408
 409 static const struct rj54n1_reg_val bank_10[] = {
 410         {0x10bf, 0x69}
 411 };
 412
 413 /* Clock dividers - these are default register values, divider = register + 1 */
 414 static const struct rj54n1_clock_div clk_div = {
 415         .ratio_tg       = 3 /* default: 5 */,
 416         .ratio_t        = 4 /* default: 1 */,
 417         .ratio_r        = 4 /* default: 0 */,
 418         .ratio_op       = 1 /* default: 5 */,
 419         .ratio_o        = 9 /* default: 0 */,
 420 };
 421
 422 static struct rj54n1 *to_rj54n1(const struct i2c_client *client)
 423 {
 424         return container_of(i2c_get_clientdata(client), struct rj54n1, subdev);
 425 }
 426
 427 static int reg_read(struct i2c_client *client, const u16 reg)
 428 {
 429         struct rj54n1 *rj54n1 = to_rj54n1(client);
 430         int ret;
 431
 432         /* set bank */
 433         if (rj54n1->bank != reg >> 8) {
 434                 dev_dbg(&client->dev, "[0x%x] = 0x%x\n", 0xff, reg >> 8);
 435                 ret = i2c_smbus_write_byte_data(client, 0xff, reg >> 8);
 436                 if (ret < 0)
 437                         return ret;
 438                 rj54n1->bank = reg >> 8;
 439         }
 440         return i2c_smbus_read_byte_data(client, reg & 0xff);
 441 }
 442
 443 static int reg_write(struct i2c_client *client, const u16 reg,
 444                      const u8 data)
 445 {
 446         struct rj54n1 *rj54n1 = to_rj54n1(client);
 447         int ret;
 448
 449         /* set bank */
 450         if (rj54n1->bank != reg >> 8) {
 451                 dev_dbg(&client->dev, "[0x%x] = 0x%x\n", 0xff, reg >> 8);
 452                 ret = i2c_smbus_write_byte_data(client, 0xff, reg >> 8);
 453                 if (ret < 0)
 454                         return ret;
 455                 rj54n1->bank = reg >> 8;
 456         }
 457         dev_dbg(&client->dev, "[0x%x] = 0x%x\n", reg & 0xff, data);
 458         return i2c_smbus_write_byte_data(client, reg & 0xff, data);
 459 }
 460
 461 static int reg_set(struct i2c_client *client, const u16 reg,
 462                    const u8 data, const u8 mask)
 463 {
 464         int ret;
 465
 466         ret = reg_read(client, reg);
 467         if (ret < 0)
 468                 return ret;
 469         return reg_write(client, reg, (ret & ~mask) | (data & mask));
 470 }
 471
 472 static int reg_write_multiple(struct i2c_client *client,
 473                               const struct rj54n1_reg_val *rv, const int n)
 474 {
 475         int i, ret;
 476
 477         for (i = 0; i < n; i++) {
 478                 ret = reg_write(client, rv->reg, rv->val);
 479                 if (ret < 0)
 480                         return ret;
 481                 rv++;
 482         }
 483
 484         return 0;
 485 }
 486
 487 static int rj54n1_enum_fmt(struct v4l2_subdev *sd, unsigned int index,
 488                            enum v4l2_mbus_pixelcode *code)
 489 {
 490         if (index >= ARRAY_SIZE(rj54n1_colour_fmts))
 491                 return -EINVAL;
 492
 493         *code = rj54n1_colour_fmts[index].code;
 494         return 0;
 495 }
 496
 497 static int rj54n1_s_stream(struct v4l2_subdev *sd, int enable)
 498 {
 499         struct i2c_client *client = v4l2_get_subdevdata(sd);
 500
 501         /* Switch between preview and still shot modes */
 502         return reg_set(client, RJ54N1_STILL_CONTROL, (!enable) << 7, 0x80);
 503 }
 504
 505 static int rj54n1_set_rect(struct i2c_client *client,
 506                            u16 reg_x, u16 reg_y, u16 reg_xy,
 507                            u32 width, u32 height)
 508 {
 509         int ret;
 510
 511         ret = reg_write(client, reg_xy,
 512                         ((width >> 4) & 0x70) |
 513                         ((height >> 8) & 7));
 514
 515         if (!ret)
 516                 ret = reg_write(client, reg_x, width & 0xff);
 517         if (!ret)
 518                 ret = reg_write(client, reg_y, height & 0xff);
 519
 520         return ret;
 521 }
 522
 523 /*
 524  * Some commands, specifically certain initialisation sequences, require
 525  * a commit operation.
 526  */
 527 static int rj54n1_commit(struct i2c_client *client)
 528 {
 529         int ret = reg_write(client, RJ54N1_INIT_START, 1);
 530         msleep(10);
 531         if (!ret)
 532                 ret = reg_write(client, RJ54N1_INIT_START, 0);
 533         return ret;
 534 }
 535
 536 static int rj54n1_sensor_scale(struct v4l2_subdev *sd, s32 *in_w, s32 *in_h,
 537                                s32 *out_w, s32 *out_h);
 538
 539 static int rj54n1_s_crop(struct v4l2_subdev *sd, struct v4l2_crop *a)
 540 {
 541         struct i2c_client *client = v4l2_get_subdevdata(sd);
 542         struct rj54n1 *rj54n1 = to_rj54n1(client);
 543         struct v4l2_rect *rect = &a->c;
 544         int dummy = 0, output_w, output_h,
 545                 input_w = rect->width, input_h = rect->height;
 546         int ret;
 547
 548         /* arbitrary minimum width and height, edges unimportant */
 549         soc_camera_limit_side(&dummy, &input_w,
 550                      RJ54N1_COLUMN_SKIP, 8, RJ54N1_MAX_WIDTH);
 551
 552         soc_camera_limit_side(&dummy, &input_h,
 553                      RJ54N1_ROW_SKIP, 8, RJ54N1_MAX_HEIGHT);
 554
 555         output_w = (input_w * 1024 + rj54n1->resize / 2) / rj54n1->resize;
 556         output_h = (input_h * 1024 + rj54n1->resize / 2) / rj54n1->resize;
 557
 558         dev_dbg(&client->dev, "Scaling for %dx%d : %u = %dx%d\n",
 559                 input_w, input_h, rj54n1->resize, output_w, output_h);
 560
 561         ret = rj54n1_sensor_scale(sd, &input_w, &input_h, &output_w, &output_h);
 562         if (ret < 0)
 563                 return ret;
 564
 565         rj54n1->width           = output_w;
 566         rj54n1->height          = output_h;
 567         rj54n1->resize          = ret;
 568         rj54n1->rect.width      = input_w;
 569         rj54n1->rect.height     = input_h;
 570
 571         return 0;
 572 }
 573
 574 static int rj54n1_g_crop(struct v4l2_subdev *sd, struct v4l2_crop *a)
 575 {
 576         struct i2c_client *client = v4l2_get_subdevdata(sd);
 577         struct rj54n1 *rj54n1 = to_rj54n1(client);
 578
 579         a->c    = rj54n1->rect;
 580         a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 581
 582         return 0;
 583 }
 584
 585 static int rj54n1_cropcap(struct v4l2_subdev *sd, struct v4l2_cropcap *a)
 586 {
 587         a->bounds.left                  = RJ54N1_COLUMN_SKIP;
 588         a->bounds.top                   = RJ54N1_ROW_SKIP;
 589         a->bounds.width                 = RJ54N1_MAX_WIDTH;
 590         a->bounds.height                = RJ54N1_MAX_HEIGHT;
 591         a->defrect                      = a->bounds;
 592         a->type                         = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 593         a->pixelaspect.numerator        = 1;
 594         a->pixelaspect.denominator      = 1;
 595
 596         return 0;
 597 }
 598
 599 static int rj54n1_g_fmt(struct v4l2_subdev *sd,
 600                         struct v4l2_mbus_framefmt *mf)
 601 {
 602         struct i2c_client *client = v4l2_get_subdevdata(sd);
 603         struct rj54n1 *rj54n1 = to_rj54n1(client);
 604
 605         mf->code        = rj54n1->fmt->code;
 606         mf->colorspace  = rj54n1->fmt->colorspace;
 607         mf->field       = V4L2_FIELD_NONE;
 608         mf->width       = rj54n1->width;
 609         mf->height      = rj54n1->height;
 610
 611         return 0;
 612 }
 613
 614 /*
 615  * The actual geometry configuration routine. It scales the input window into
 616  * the output one, updates the window sizes and returns an error or the resize
 617  * coefficient on success. Note: we only use the "Fixed Scaling" on this camera.
 618  */
 619 static int rj54n1_sensor_scale(struct v4l2_subdev *sd, s32 *in_w, s32 *in_h,
 620                                s32 *out_w, s32 *out_h)
 621 {
 622         struct i2c_client *client = v4l2_get_subdevdata(sd);
 623         struct rj54n1 *rj54n1 = to_rj54n1(client);
 624         unsigned int skip, resize, input_w = *in_w, input_h = *in_h,
 625                 output_w = *out_w, output_h = *out_h;
 626         u16 inc_sel, wb_bit8, wb_left, wb_right, wb_top, wb_bottom;
 627         unsigned int peak, peak_50, peak_60;
 628         int ret;
 629
 630         /*
 631          * We have a problem with crops, where the window is larger than 512x384
 632          * and output window is larger than a half of the input one. In this
 633          * case we have to either reduce the input window to equal or below
 634          * 512x384 or the output window to equal or below 1/2 of the input.
 635          */
 636         if (output_w > max(512U, input_w / 2)) {
 637                 if (2 * output_w > RJ54N1_MAX_WIDTH) {
 638                         input_w = RJ54N1_MAX_WIDTH;
 639                         output_w = RJ54N1_MAX_WIDTH / 2;
 640                 } else {
 641                         input_w = output_w * 2;
 642                 }
 643
 644                 dev_dbg(&client->dev, "Adjusted output width: in %u, out %u\n",
 645                         input_w, output_w);
 646         }
 647
 648         if (output_h > max(384U, input_h / 2)) {
 649                 if (2 * output_h > RJ54N1_MAX_HEIGHT) {
 650                         input_h = RJ54N1_MAX_HEIGHT;
 651                         output_h = RJ54N1_MAX_HEIGHT / 2;
 652                 } else {
 653                         input_h = output_h * 2;
 654                 }
 655
 656                 dev_dbg(&client->dev, "Adjusted output height: in %u, out %u\n",
 657                         input_h, output_h);
 658         }
 659
 660         /* Idea: use the read mode for snapshots, handle separate geometries */
 661         ret = rj54n1_set_rect(client, RJ54N1_X_OUTPUT_SIZE_S_L,
 662                               RJ54N1_Y_OUTPUT_SIZE_S_L,
 663                               RJ54N1_XY_OUTPUT_SIZE_S_H, output_w, output_h);
 664         if (!ret)
 665                 ret = rj54n1_set_rect(client, RJ54N1_X_OUTPUT_SIZE_P_L,
 666                               RJ54N1_Y_OUTPUT_SIZE_P_L,
 667                               RJ54N1_XY_OUTPUT_SIZE_P_H, output_w, output_h);
 668
 669         if (ret < 0)
 670                 return ret;
 671
 672         if (output_w > input_w && output_h > input_h) {
 673                 input_w = output_w;
 674                 input_h = output_h;
 675
 676                 resize = 1024;
 677         } else {
 678                 unsigned int resize_x, resize_y;
 679                 resize_x = (input_w * 1024 + output_w / 2) / output_w;
 680                 resize_y = (input_h * 1024 + output_h / 2) / output_h;
 681
 682                 /* We want max(resize_x, resize_y), check if it still fits */
 683                 if (resize_x > resize_y &&
 684                     (output_h * resize_x + 512) / 1024 > RJ54N1_MAX_HEIGHT)
 685                         resize = (RJ54N1_MAX_HEIGHT * 1024 + output_h / 2) /
 686                                 output_h;
 687                 else if (resize_y > resize_x &&
 688                          (output_w * resize_y + 512) / 1024 > RJ54N1_MAX_WIDTH)
 689                         resize = (RJ54N1_MAX_WIDTH * 1024 + output_w / 2) /
 690                                 output_w;
 691                 else
 692                         resize = max(resize_x, resize_y);
 693
 694                 /* Prohibited value ranges */
 695                 switch (resize) {
 696                 case 2040 ... 2047:
 697                         resize = 2039;
 698                         break;
 699                 case 4080 ... 4095:
 700                         resize = 4079;
 701                         break;
 702                 case 8160 ... 8191:
 703                         resize = 8159;
 704                         break;
 705                 case 16320 ... 16384:
 706                         resize = 16319;
 707                 }
 708         }
 709
 710         /* Set scaling */
 711         ret = reg_write(client, RJ54N1_RESIZE_HOLD_L, resize & 0xff);
 712         if (!ret)
 713                 ret = reg_write(client, RJ54N1_RESIZE_HOLD_H, resize >> 8);
 714
 715         if (ret < 0)
 716                 return ret;
 717
 718         /*
 719          * Configure a skipping bitmask. The sensor will select a skipping value
 720          * among set bits automatically. This is very unclear in the datasheet
 721          * too. I was told, in this register one enables all skipping values,
 722          * that are required for a specific resize, and the camera selects
 723          * automatically, which ones to use. But it is unclear how to identify,
 724          * which cropping values are needed. Secondly, why don't we just set all
 725          * bits and let the camera choose? Would it increase processing time and
 726          * reduce the framerate? Using 0xfffc for INC_USE_SEL doesn't seem to
 727          * improve the image quality or stability for larger frames (see comment
 728          * above), but I didn't check the framerate.
 729          */
 730         skip = min(resize / 1024, 15U);
 731
 732         inc_sel = 1 << skip;
 733
 734         if (inc_sel <= 2)
 735                 inc_sel = 0xc;
 736         else if (resize & 1023 && skip < 15)
 737                 inc_sel |= 1 << (skip + 1);
 738
 739         ret = reg_write(client, RJ54N1_INC_USE_SEL_L, inc_sel & 0xfc);
 740         if (!ret)
 741                 ret = reg_write(client, RJ54N1_INC_USE_SEL_H, inc_sel >> 8);
 742
 743         if (!rj54n1->auto_wb) {
 744                 /* Auto white balance window */
 745                 wb_left   = output_w / 16;
 746                 wb_right  = (3 * output_w / 4 - 3) / 4;
 747                 wb_top    = output_h / 16;
 748                 wb_bottom = (3 * output_h / 4 - 3) / 4;
 749                 wb_bit8   = ((wb_left >> 2) & 0x40) | ((wb_top >> 4) & 0x10) |
 750                         ((wb_right >> 6) & 4) | ((wb_bottom >> 8) & 1);
 751
 752                 if (!ret)
 753                         ret = reg_write(client, RJ54N1_BIT8_WB, wb_bit8);
 754                 if (!ret)
 755                         ret = reg_write(client, RJ54N1_HCAPS_WB, wb_left);
 756                 if (!ret)
 757                         ret = reg_write(client, RJ54N1_VCAPS_WB, wb_top);
 758                 if (!ret)
 759                         ret = reg_write(client, RJ54N1_HCAPE_WB, wb_right);
 760                 if (!ret)
 761                         ret = reg_write(client, RJ54N1_VCAPE_WB, wb_bottom);
 762         }
 763
 764         /* Antiflicker */
 765         peak = 12 * RJ54N1_MAX_WIDTH * (1 << 14) * resize / rj54n1->tgclk_mhz /
 766                 10000;
 767         peak_50 = peak / 6;
 768         peak_60 = peak / 5;
 769
 770         if (!ret)
 771                 ret = reg_write(client, RJ54N1_PEAK_H,
 772                                 ((peak_50 >> 4) & 0xf0) | (peak_60 >> 8));
 773         if (!ret)
 774                 ret = reg_write(client, RJ54N1_PEAK_50, peak_50);
 775         if (!ret)
 776                 ret = reg_write(client, RJ54N1_PEAK_60, peak_60);
 777         if (!ret)
 778                 ret = reg_write(client, RJ54N1_PEAK_DIFF, peak / 150);
 779
 780         /* Start resizing */
 781         if (!ret)
 782                 ret = reg_write(client, RJ54N1_RESIZE_CONTROL,
 783                                 RESIZE_HOLD_SEL | RESIZE_GO | 1);
 784
 785         if (ret < 0)
 786                 return ret;
 787
 788         /* Constant taken from manufacturer's example */
 789         msleep(230);
 790
 791         ret = reg_write(client, RJ54N1_RESIZE_CONTROL, RESIZE_HOLD_SEL | 1);
 792         if (ret < 0)
 793                 return ret;
 794
 795         *in_w = (output_w * resize + 512) / 1024;
 796         *in_h = (output_h * resize + 512) / 1024;
 797         *out_w = output_w;
 798         *out_h = output_h;
 799
 800         dev_dbg(&client->dev, "Scaled for %dx%d : %u = %ux%u, skip %u\n",
 801                 *in_w, *in_h, resize, output_w, output_h, skip);
 802
 803         return resize;
 804 }
 805
 806 static int rj54n1_set_clock(struct i2c_client *client)
 807 {
 808         struct rj54n1 *rj54n1 = to_rj54n1(client);
 809         int ret;
 810
 811         /* Enable external clock */
 812         ret = reg_write(client, RJ54N1_RESET_STANDBY, E_EXCLK | SOFT_STDBY);
 813         /* Leave stand-by. Note: use this when implementing suspend / resume */
 814         if (!ret)
 815                 ret = reg_write(client, RJ54N1_RESET_STANDBY, E_EXCLK);
 816
 817         if (!ret)
 818                 ret = reg_write(client, RJ54N1_PLL_L, PLL_L);
 819         if (!ret)
 820                 ret = reg_write(client, RJ54N1_PLL_N, PLL_N);
 821
 822         /* TGCLK dividers */
 823         if (!ret)
 824                 ret = reg_write(client, RJ54N1_RATIO_TG,
 825                                 rj54n1->clk_div.ratio_tg);
 826         if (!ret)
 827                 ret = reg_write(client, RJ54N1_RATIO_T,
 828                                 rj54n1->clk_div.ratio_t);
 829         if (!ret)
 830                 ret = reg_write(client, RJ54N1_RATIO_R,
 831                                 rj54n1->clk_div.ratio_r);
 832
 833         /* Enable TGCLK & RAMP */
 834         if (!ret)
 835                 ret = reg_write(client, RJ54N1_RAMP_TGCLK_EN, 3);
 836
 837         /* Disable clock output */
 838         if (!ret)
 839                 ret = reg_write(client, RJ54N1_OCLK_DSP, 0);
 840
 841         /* Set divisors */
 842         if (!ret)
 843                 ret = reg_write(client, RJ54N1_RATIO_OP,
 844                                 rj54n1->clk_div.ratio_op);
 845         if (!ret)
 846                 ret = reg_write(client, RJ54N1_RATIO_O,
 847                                 rj54n1->clk_div.ratio_o);
 848
 849         /* Enable OCLK */
 850         if (!ret)
 851                 ret = reg_write(client, RJ54N1_OCLK_SEL_EN, 1);
 852
 853         /* Use PLL for Timing Generator, write 2 to reserved bits */
 854         if (!ret)
 855                 ret = reg_write(client, RJ54N1_TG_BYPASS, 2);
 856
 857         /* Take sensor out of reset */
 858         if (!ret)
 859                 ret = reg_write(client, RJ54N1_RESET_STANDBY,
 860                                 E_EXCLK | SEN_RSTX);
 861         /* Enable PLL */
 862         if (!ret)
 863                 ret = reg_write(client, RJ54N1_PLL_EN, 1);
 864
 865         /* Wait for PLL to stabilise */
 866         msleep(10);
 867
 868         /* Enable clock to frequency divider */
 869         if (!ret)
 870                 ret = reg_write(client, RJ54N1_CLK_RST, 1);
 871
 872         if (!ret)
 873                 ret = reg_read(client, RJ54N1_CLK_RST);
 874         if (ret != 1) {
 875                 dev_err(&client->dev,
 876                         "Resetting RJ54N1CB0C clock failed: %d!\n", ret);
 877                 return -EIO;
 878         }
 879
 880         /* Start the PLL */
 881         ret = reg_set(client, RJ54N1_OCLK_DSP, 1, 1);
 882
 883         /* Enable OCLK */
 884         if (!ret)
 885                 ret = reg_write(client, RJ54N1_OCLK_SEL_EN, 1);
 886
 887         return ret;
 888 }
 889
 890 static int rj54n1_reg_init(struct i2c_client *client)
 891 {
 892         struct rj54n1 *rj54n1 = to_rj54n1(client);
 893         int ret = rj54n1_set_clock(client);
 894
 895         if (!ret)
 896                 ret = reg_write_multiple(client, bank_7, ARRAY_SIZE(bank_7));
 897         if (!ret)
 898                 ret = reg_write_multiple(client, bank_10, ARRAY_SIZE(bank_10));
 899
 900         /* Set binning divisors */
 901         if (!ret)
 902                 ret = reg_write(client, RJ54N1_SCALE_1_2_LEV, 3 | (7 << 4));
 903         if (!ret)
 904                 ret = reg_write(client, RJ54N1_SCALE_4_LEV, 0xf);
 905
 906         /* Switch to fixed resize mode */
 907         if (!ret)
 908                 ret = reg_write(client, RJ54N1_RESIZE_CONTROL,
 909                                 RESIZE_HOLD_SEL | 1);
 910
 911         /* Set gain */
 912         if (!ret)
 913                 ret = reg_write(client, RJ54N1_Y_GAIN, 0x84);
 914
 915         /*
 916          * Mirror the image back: default is upside down and left-to-right...
 917          * Set manual preview / still shot switching
 918          */
 919         if (!ret)
 920                 ret = reg_write(client, RJ54N1_MIRROR_STILL_MODE, 0x27);
 921
 922         if (!ret)
 923                 ret = reg_write_multiple(client, bank_4, ARRAY_SIZE(bank_4));
 924
 925         /* Auto exposure area */
 926         if (!ret)
 927                 ret = reg_write(client, RJ54N1_EXPOSURE_CONTROL, 0x80);
 928         /* Check current auto WB config */
 929         if (!ret)
 930                 ret = reg_read(client, RJ54N1_WB_SEL_WEIGHT_I);
 931         if (ret >= 0) {
 932                 rj54n1->auto_wb = ret & 0x80;
 933                 ret = reg_write_multiple(client, bank_5, ARRAY_SIZE(bank_5));
 934         }
 935         if (!ret)
 936                 ret = reg_write_multiple(client, bank_8, ARRAY_SIZE(bank_8));
 937
 938         if (!ret)
 939                 ret = reg_write(client, RJ54N1_RESET_STANDBY,
 940                                 E_EXCLK | DSP_RSTX | SEN_RSTX);
 941
 942         /* Commit init */
 943         if (!ret)
 944                 ret = rj54n1_commit(client);
 945
 946         /* Take DSP, TG, sensor out of reset */
 947         if (!ret)
 948                 ret = reg_write(client, RJ54N1_RESET_STANDBY,
 949                                 E_EXCLK | DSP_RSTX | TG_RSTX | SEN_RSTX);
 950
 951         /* Start register update? Same register as 0x?FE in many bank_* sets */
 952         if (!ret)
 953                 ret = reg_write(client, RJ54N1_FWFLG, 2);
 954
 955         /* Constant taken from manufacturer's example */
 956         msleep(700);
 957
 958         return ret;
 959 }
 960
 961 static int rj54n1_try_fmt(struct v4l2_subdev *sd,
 962                           struct v4l2_mbus_framefmt *mf)
 963 {
 964         struct i2c_client *client = v4l2_get_subdevdata(sd);
 965         struct rj54n1 *rj54n1 = to_rj54n1(client);
 966         const struct rj54n1_datafmt *fmt;
 967         int align = mf->code == V4L2_MBUS_FMT_SBGGR10_1X10 ||
 968                 mf->code == V4L2_MBUS_FMT_SBGGR10_2X8_PADHI_BE ||
 969                 mf->code == V4L2_MBUS_FMT_SBGGR10_2X8_PADLO_BE ||
 970                 mf->code == V4L2_MBUS_FMT_SBGGR10_2X8_PADHI_LE ||
 971                 mf->code == V4L2_MBUS_FMT_SBGGR10_2X8_PADLO_LE;
 972
 973         dev_dbg(&client->dev, "%s: code = %d, width = %u, height = %u\n",
 974                 __func__, mf->code, mf->width, mf->height);
 975
 976         fmt = rj54n1_find_datafmt(mf->code, rj54n1_colour_fmts,
 977                                   ARRAY_SIZE(rj54n1_colour_fmts));
 978         if (!fmt) {
 979                 fmt = rj54n1->fmt;
 980                 mf->code = fmt->code;
 981         }
 982
 983         mf->field       = V4L2_FIELD_NONE;
 984         mf->colorspace  = fmt->colorspace;
 985
 986         v4l_bound_align_image(&mf->width, 112, RJ54N1_MAX_WIDTH, align,
 987                               &mf->height, 84, RJ54N1_MAX_HEIGHT, align, 0);
 988
 989         return 0;
 990 }
 991
 992 static int rj54n1_s_fmt(struct v4l2_subdev *sd,
 993                         struct v4l2_mbus_framefmt *mf)
 994 {
 995         struct i2c_client *client = v4l2_get_subdevdata(sd);
 996         struct rj54n1 *rj54n1 = to_rj54n1(client);
 997         const struct rj54n1_datafmt *fmt;
 998         int output_w, output_h, max_w, max_h,
 999                 input_w = rj54n1->rect.width, input_h = rj54n1->rect.height;
1000         int ret;
1001
1002         /*
1003          * The host driver can call us without .try_fmt(), so, we have to take
1004          * care ourseleves
1005          */
1006         rj54n1_try_fmt(sd, mf);
1007
1008         /*
1009          * Verify if the sensor has just been powered on. TODO: replace this
1010          * with proper PM, when a suitable API is available.
1011          */
1012         ret = reg_read(client, RJ54N1_RESET_STANDBY);
1013         if (ret < 0)
1014                 return ret;
1015
1016         if (!(ret & E_EXCLK)) {
1017                 ret = rj54n1_reg_init(client);
1018                 if (ret < 0)
1019                         return ret;
1020         }
1021
1022         dev_dbg(&client->dev, "%s: code = %d, width = %u, height = %u\n",
1023                 __func__, mf->code, mf->width, mf->height);
1024
1025         /* RA_SEL_UL is only relevant for raw modes, ignored otherwise. */
1026         switch (mf->code) {
1027         case V4L2_MBUS_FMT_YUYV8_2X8:
1028                 ret = reg_write(client, RJ54N1_OUT_SEL, 0);
1029                 if (!ret)
1030                         ret = reg_set(client, RJ54N1_BYTE_SWAP, 8, 8);
1031                 break;
1032         case V4L2_MBUS_FMT_YVYU8_2X8:
1033                 ret = reg_write(client, RJ54N1_OUT_SEL, 0);
1034                 if (!ret)
1035                         ret = reg_set(client, RJ54N1_BYTE_SWAP, 0, 8);
1036                 break;
1037         case V4L2_MBUS_FMT_RGB565_2X8_LE:
1038                 ret = reg_write(client, RJ54N1_OUT_SEL, 0x11);
1039                 if (!ret)
1040                         ret = reg_set(client, RJ54N1_BYTE_SWAP, 8, 8);
1041                 break;
1042         case V4L2_MBUS_FMT_RGB565_2X8_BE:
1043                 ret = reg_write(client, RJ54N1_OUT_SEL, 0x11);
1044                 if (!ret)
1045                         ret = reg_set(client, RJ54N1_BYTE_SWAP, 0, 8);
1046                 break;
1047         case V4L2_MBUS_FMT_SBGGR10_2X8_PADLO_LE:
1048                 ret = reg_write(client, RJ54N1_OUT_SEL, 4);
1049                 if (!ret)
1050                         ret = reg_set(client, RJ54N1_BYTE_SWAP, 8, 8);
1051                 if (!ret)
1052                         ret = reg_write(client, RJ54N1_RA_SEL_UL, 0);
1053                 break;
1054         case V4L2_MBUS_FMT_SBGGR10_2X8_PADHI_LE:
1055                 ret = reg_write(client, RJ54N1_OUT_SEL, 4);
1056                 if (!ret)
1057                         ret = reg_set(client, RJ54N1_BYTE_SWAP, 8, 8);
1058                 if (!ret)
1059                         ret = reg_write(client, RJ54N1_RA_SEL_UL, 8);
1060                 break;
1061         case V4L2_MBUS_FMT_SBGGR10_2X8_PADLO_BE:
1062                 ret = reg_write(client, RJ54N1_OUT_SEL, 4);
1063                 if (!ret)
1064                         ret = reg_set(client, RJ54N1_BYTE_SWAP, 0, 8);
1065                 if (!ret)
1066                         ret = reg_write(client, RJ54N1_RA_SEL_UL, 0);
1067                 break;
1068         case V4L2_MBUS_FMT_SBGGR10_2X8_PADHI_BE:
1069                 ret = reg_write(client, RJ54N1_OUT_SEL, 4);
1070                 if (!ret)
1071                         ret = reg_set(client, RJ54N1_BYTE_SWAP, 0, 8);
1072                 if (!ret)
1073                         ret = reg_write(client, RJ54N1_RA_SEL_UL, 8);
1074                 break;
1075         case V4L2_MBUS_FMT_SBGGR10_1X10:
1076                 ret = reg_write(client, RJ54N1_OUT_SEL, 5);
1077                 break;
1078         default:
1079                 ret = -EINVAL;
1080         }
1081
1082         /* Special case: a raw mode with 10 bits of data per clock tick */
1083         if (!ret)
1084                 ret = reg_set(client, RJ54N1_OCLK_SEL_EN,
1085                               (mf->code == V4L2_MBUS_FMT_SBGGR10_1X10) << 1, 2);
1086
1087         if (ret < 0)
1088                 return ret;
1089
1090         /* Supported scales 1:1 >= scale > 1:16 */
1091         max_w = mf->width * (16 * 1024 - 1) / 1024;
1092         if (input_w > max_w)
1093                 input_w = max_w;
1094         max_h = mf->height * (16 * 1024 - 1) / 1024;
1095         if (input_h > max_h)
1096                 input_h = max_h;
1097
1098         output_w = mf->width;
1099         output_h = mf->height;
1100
1101         ret = rj54n1_sensor_scale(sd, &input_w, &input_h, &output_w, &output_h);
1102         if (ret < 0)
1103                 return ret;
1104
1105         fmt = rj54n1_find_datafmt(mf->code, rj54n1_colour_fmts,
1106                                   ARRAY_SIZE(rj54n1_colour_fmts));
1107
1108         rj54n1->fmt             = fmt;
1109         rj54n1->resize          = ret;
1110         rj54n1->rect.width      = input_w;
1111         rj54n1->rect.height     = input_h;
1112         rj54n1->width           = output_w;
1113         rj54n1->height          = output_h;
1114
1115         mf->width               = output_w;
1116         mf->height              = output_h;
1117         mf->field               = V4L2_FIELD_NONE;
1118         mf->colorspace          = fmt->colorspace;
1119
1120         return 0;
1121 }
1122
1123 static int rj54n1_g_chip_ident(struct v4l2_subdev *sd,
1124                                struct v4l2_dbg_chip_ident *id)
1125 {
1126         struct i2c_client *client = v4l2_get_subdevdata(sd);
1127
1128         if (id->match.type != V4L2_CHIP_MATCH_I2C_ADDR)
1129                 return -EINVAL;
1130
1131         if (id->match.addr != client->addr)
1132                 return -ENODEV;
1133
1134         id->ident       = V4L2_IDENT_RJ54N1CB0C;
1135         id->revision    = 0;
1136
1137         return 0;
1138 }
1139
1140 #ifdef CONFIG_VIDEO_ADV_DEBUG
1141 static int rj54n1_g_register(struct v4l2_subdev *sd,
1142                              struct v4l2_dbg_register *reg)
1143 {
1144         struct i2c_client *client = v4l2_get_subdevdata(sd);
1145
1146         if (reg->match.type != V4L2_CHIP_MATCH_I2C_ADDR ||
1147             reg->reg < 0x400 || reg->reg > 0x1fff)
1148                 /* Registers > 0x0800 are only available from Sharp support */
1149                 return -EINVAL;
1150
1151         if (reg->match.addr != client->addr)
1152                 return -ENODEV;
1153
1154         reg->size = 1;
1155         reg->val = reg_read(client, reg->reg);
1156
1157         if (reg->val > 0xff)
1158                 return -EIO;
1159
1160         return 0;
1161 }
1162
1163 static int rj54n1_s_register(struct v4l2_subdev *sd,
1164                              struct v4l2_dbg_register *reg)
1165 {
1166         struct i2c_client *client = v4l2_get_subdevdata(sd);
1167
1168         if (reg->match.type != V4L2_CHIP_MATCH_I2C_ADDR ||
1169             reg->reg < 0x400 || reg->reg > 0x1fff)
1170                 /* Registers >= 0x0800 are only available from Sharp support */
1171                 return -EINVAL;
1172
1173         if (reg->match.addr != client->addr)
1174                 return -ENODEV;
1175
1176         if (reg_write(client, reg->reg, reg->val) < 0)
1177                 return -EIO;
1178
1179         return 0;
1180 }
1181 #endif
1182
1183 static int rj54n1_s_ctrl(struct v4l2_ctrl *ctrl)
1184 {
1185         struct rj54n1 *rj54n1 = container_of(ctrl->handler, struct rj54n1, hdl);
1186         struct v4l2_subdev *sd = &rj54n1->subdev;
1187         struct i2c_client *client = v4l2_get_subdevdata(sd);
1188         int data;
1189
1190         switch (ctrl->id) {
1191         case V4L2_CID_VFLIP:
1192                 if (ctrl->val)
1193                         data = reg_set(client, RJ54N1_MIRROR_STILL_MODE, 0, 1);
1194                 else
1195                         data = reg_set(client, RJ54N1_MIRROR_STILL_MODE, 1, 1);
1196                 if (data < 0)
1197                         return -EIO;
1198                 return 0;
1199         case V4L2_CID_HFLIP:
1200                 if (ctrl->val)
1201                         data = reg_set(client, RJ54N1_MIRROR_STILL_MODE, 0, 2);
1202                 else
1203                         data = reg_set(client, RJ54N1_MIRROR_STILL_MODE, 2, 2);
1204                 if (data < 0)
1205                         return -EIO;
1206                 return 0;
1207         case V4L2_CID_GAIN:
1208                 if (reg_write(client, RJ54N1_Y_GAIN, ctrl->val * 2) < 0)
1209                         return -EIO;
1210                 return 0;
1211         case V4L2_CID_AUTO_WHITE_BALANCE:
1212                 /* Auto WB area - whole image */
1213                 if (reg_set(client, RJ54N1_WB_SEL_WEIGHT_I, ctrl->val << 7,
1214                             0x80) < 0)
1215                         return -EIO;
1216                 rj54n1->auto_wb = ctrl->val;
1217                 return 0;
1218         }
1219
1220         return -EINVAL;
1221 }
1222
1223 static const struct v4l2_ctrl_ops rj54n1_ctrl_ops = {
1224         .s_ctrl = rj54n1_s_ctrl,
1225 };
1226
1227 static struct v4l2_subdev_core_ops rj54n1_subdev_core_ops = {
1228         .g_chip_ident   = rj54n1_g_chip_ident,
1229 #ifdef CONFIG_VIDEO_ADV_DEBUG
1230         .g_register     = rj54n1_g_register,
1231         .s_register     = rj54n1_s_register,
1232 #endif
1233 };
1234
1235 static int rj54n1_g_mbus_config(struct v4l2_subdev *sd,
1236                                 struct v4l2_mbus_config *cfg)
1237 {
1238         struct i2c_client *client = v4l2_get_subdevdata(sd);
1239         struct soc_camera_link *icl = soc_camera_i2c_to_link(client);
1240
1241         cfg->flags =
1242                 V4L2_MBUS_PCLK_SAMPLE_RISING | V4L2_MBUS_PCLK_SAMPLE_FALLING |
1243                 V4L2_MBUS_MASTER | V4L2_MBUS_DATA_ACTIVE_HIGH |
1244                 V4L2_MBUS_HSYNC_ACTIVE_HIGH | V4L2_MBUS_VSYNC_ACTIVE_HIGH;
1245         cfg->type = V4L2_MBUS_PARALLEL;
1246         cfg->flags = soc_camera_apply_board_flags(icl, cfg);
1247
1248         return 0;
1249 }
1250
1251 static int rj54n1_s_mbus_config(struct v4l2_subdev *sd,
1252                                 const struct v4l2_mbus_config *cfg)
1253 {
1254         struct i2c_client *client = v4l2_get_subdevdata(sd);
1255         struct soc_camera_link *icl = soc_camera_i2c_to_link(client);
1256
1257         /* Figures 2.5-1 to 2.5-3 - default falling pixclk edge */
1258         if (soc_camera_apply_board_flags(icl, cfg) &
1259             V4L2_MBUS_PCLK_SAMPLE_RISING)
1260                 return reg_write(client, RJ54N1_OUT_SIGPO, 1 << 4);
1261         else
1262                 return reg_write(client, RJ54N1_OUT_SIGPO, 0);
1263 }
1264
1265 static struct v4l2_subdev_video_ops rj54n1_subdev_video_ops = {
1266         .s_stream       = rj54n1_s_stream,
1267         .s_mbus_fmt     = rj54n1_s_fmt,
1268         .g_mbus_fmt     = rj54n1_g_fmt,
1269         .try_mbus_fmt   = rj54n1_try_fmt,
1270         .enum_mbus_fmt  = rj54n1_enum_fmt,
1271         .g_crop         = rj54n1_g_crop,
1272         .s_crop         = rj54n1_s_crop,
1273         .cropcap        = rj54n1_cropcap,
1274         .g_mbus_config  = rj54n1_g_mbus_config,
1275         .s_mbus_config  = rj54n1_s_mbus_config,
1276 };
1277
1278 static struct v4l2_subdev_ops rj54n1_subdev_ops = {
1279         .core   = &rj54n1_subdev_core_ops,
1280         .video  = &rj54n1_subdev_video_ops,
1281 };
1282
1283 /*
1284  * Interface active, can use i2c. If it fails, it can indeed mean, that
1285  * this wasn't our capture interface, so, we wait for the right one
1286  */
1287 static int rj54n1_video_probe(struct i2c_client *client,
1288                               struct rj54n1_pdata *priv)
1289 {
1290         int data1, data2;
1291         int ret;
1292
1293         /* Read out the chip version register */
1294         data1 = reg_read(client, RJ54N1_DEV_CODE);
1295         data2 = reg_read(client, RJ54N1_DEV_CODE2);
1296
1297         if (data1 != 0x51 || data2 != 0x10) {
1298                 ret = -ENODEV;
1299                 dev_info(&client->dev, "No RJ54N1CB0C found, read 0x%x:0x%x\n",
1300                          data1, data2);
1301                 goto ei2c;
1302         }
1303
1304         /* Configure IOCTL polarity from the platform data: 0 or 1 << 7. */
1305         ret = reg_write(client, RJ54N1_IOC, priv->ioctl_high << 7);
1306         if (ret < 0)
1307                 goto ei2c;
1308
1309         dev_info(&client->dev, "Detected a RJ54N1CB0C chip ID 0x%x:0x%x\n",
1310                  data1, data2);
1311
1312 ei2c:
1313         return ret;
1314 }
1315
1316 static int rj54n1_probe(struct i2c_client *client,
1317                         const struct i2c_device_id *did)
1318 {
1319         struct rj54n1 *rj54n1;
1320         struct soc_camera_link *icl = soc_camera_i2c_to_link(client);
1321         struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent);
1322         struct rj54n1_pdata *rj54n1_priv;
1323         int ret;
1324
1325         if (!icl || !icl->priv) {
1326                 dev_err(&client->dev, "RJ54N1CB0C: missing platform data!\n");
1327                 return -EINVAL;
1328         }
1329
1330         rj54n1_priv = icl->priv;
1331
1332         if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) {
1333                 dev_warn(&adapter->dev,
1334                          "I2C-Adapter doesn't support I2C_FUNC_SMBUS_BYTE\n");
1335                 return -EIO;
1336         }
1337
1338         rj54n1 = kzalloc(sizeof(struct rj54n1), GFP_KERNEL);
1339         if (!rj54n1)
1340                 return -ENOMEM;
1341
1342         v4l2_i2c_subdev_init(&rj54n1->subdev, client, &rj54n1_subdev_ops);
1343         v4l2_ctrl_handler_init(&rj54n1->hdl, 4);
1344         v4l2_ctrl_new_std(&rj54n1->hdl, &rj54n1_ctrl_ops,
1345                         V4L2_CID_VFLIP, 0, 1, 1, 0);
1346         v4l2_ctrl_new_std(&rj54n1->hdl, &rj54n1_ctrl_ops,
1347                         V4L2_CID_HFLIP, 0, 1, 1, 0);
1348         v4l2_ctrl_new_std(&rj54n1->hdl, &rj54n1_ctrl_ops,
1349                         V4L2_CID_GAIN, 0, 127, 1, 66);
1350         v4l2_ctrl_new_std(&rj54n1->hdl, &rj54n1_ctrl_ops,
1351                         V4L2_CID_AUTO_WHITE_BALANCE, 0, 1, 1, 1);
1352         rj54n1->subdev.ctrl_handler = &rj54n1->hdl;
1353         if (rj54n1->hdl.error) {
1354                 int err = rj54n1->hdl.error;
1355
1356                 kfree(rj54n1);
1357                 return err;
1358         }
1359
1360         rj54n1->clk_div         = clk_div;
1361         rj54n1->rect.left       = RJ54N1_COLUMN_SKIP;
1362         rj54n1->rect.top        = RJ54N1_ROW_SKIP;
1363         rj54n1->rect.width      = RJ54N1_MAX_WIDTH;
1364         rj54n1->rect.height     = RJ54N1_MAX_HEIGHT;
1365         rj54n1->width           = RJ54N1_MAX_WIDTH;
1366         rj54n1->height          = RJ54N1_MAX_HEIGHT;
1367         rj54n1->fmt             = &rj54n1_colour_fmts[0];
1368         rj54n1->resize          = 1024;
1369         rj54n1->tgclk_mhz       = (rj54n1_priv->mclk_freq / PLL_L * PLL_N) /
1370                 (clk_div.ratio_tg + 1) / (clk_div.ratio_t + 1);
1371
1372         ret = rj54n1_video_probe(client, rj54n1_priv);
1373         if (ret < 0) {
1374                 v4l2_ctrl_handler_free(&rj54n1->hdl);
1375                 kfree(rj54n1);
1376                 return ret;
1377         }
1378         return v4l2_ctrl_handler_setup(&rj54n1->hdl);
1379 }
1380
1381 static int rj54n1_remove(struct i2c_client *client)
1382 {
1383         struct rj54n1 *rj54n1 = to_rj54n1(client);
1384         struct soc_camera_link *icl = soc_camera_i2c_to_link(client);
1385
1386         v4l2_device_unregister_subdev(&rj54n1->subdev);
1387         if (icl->free_bus)
1388                 icl->free_bus(icl);
1389         v4l2_ctrl_handler_free(&rj54n1->hdl);
1390         kfree(rj54n1);
1391
1392         return 0;
1393 }
1394
1395 static const struct i2c_device_id rj54n1_id[] = {
1396         { "rj54n1cb0c", 0 },
1397         { }
1398 };
1399 MODULE_DEVICE_TABLE(i2c, rj54n1_id);
1400
1401 static struct i2c_driver rj54n1_i2c_driver = {
1402         .driver = {
1403                 .name = "rj54n1cb0c",
1404         },
1405         .probe          = rj54n1_probe,
1406         .remove         = rj54n1_remove,
1407         .id_table       = rj54n1_id,
1408 };
1409
1410 static int __init rj54n1_mod_init(void)
1411 {
1412         return i2c_add_driver(&rj54n1_i2c_driver);
1413 }
1414
1415 static void __exit rj54n1_mod_exit(void)
1416 {
1417         i2c_del_driver(&rj54n1_i2c_driver);
1418 }
1419
1420 module_init(rj54n1_mod_init);
1421 module_exit(rj54n1_mod_exit);
1422
1423 MODULE_DESCRIPTION("Sharp RJ54N1CB0C Camera driver");
1424 MODULE_AUTHOR("Guennadi Liakhovetski <g.liakhovetski@gmx.de>");
1425 MODULE_LICENSE("GPL v2");