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
  17 #include <media/rj54n1cb0c.h>
  18 #include <media/soc_camera.h>
  19 #include <media/v4l2-subdev.h>
  20 #include <media/v4l2-chip-ident.h>
  21 #include <media/v4l2-ctrls.h>
  22
  23 #define RJ54N1_DEV_CODE                 0x0400
  24 #define RJ54N1_DEV_CODE2                0x0401
  25 #define RJ54N1_OUT_SEL                  0x0403
  26 #define RJ54N1_XY_OUTPUT_SIZE_S_H       0x0404
  27 #define RJ54N1_X_OUTPUT_SIZE_S_L        0x0405
  28 #define RJ54N1_Y_OUTPUT_SIZE_S_L        0x0406
  29 #define RJ54N1_XY_OUTPUT_SIZE_P_H       0x0407
  30 #define RJ54N1_X_OUTPUT_SIZE_P_L        0x0408
  31 #define RJ54N1_Y_OUTPUT_SIZE_P_L        0x0409
  32 #define RJ54N1_LINE_LENGTH_PCK_S_H      0x040a
  33 #define RJ54N1_LINE_LENGTH_PCK_S_L      0x040b
  34 #define RJ54N1_LINE_LENGTH_PCK_P_H      0x040c
  35 #define RJ54N1_LINE_LENGTH_PCK_P_L      0x040d
  36 #define RJ54N1_RESIZE_N                 0x040e
  37 #define RJ54N1_RESIZE_N_STEP            0x040f
  38 #define RJ54N1_RESIZE_STEP              0x0410
  39 #define RJ54N1_RESIZE_HOLD_H            0x0411
  40 #define RJ54N1_RESIZE_HOLD_L            0x0412
  41 #define RJ54N1_H_OBEN_OFS               0x0413
  42 #define RJ54N1_V_OBEN_OFS               0x0414
  43 #define RJ54N1_RESIZE_CONTROL           0x0415
  44 #define RJ54N1_STILL_CONTROL            0x0417
  45 #define RJ54N1_INC_USE_SEL_H            0x0425
  46 #define RJ54N1_INC_USE_SEL_L            0x0426
  47 #define RJ54N1_MIRROR_STILL_MODE        0x0427
  48 #define RJ54N1_INIT_START               0x0428
  49 #define RJ54N1_SCALE_1_2_LEV            0x0429
  50 #define RJ54N1_SCALE_4_LEV              0x042a
  51 #define RJ54N1_Y_GAIN                   0x04d8
  52 #define RJ54N1_APT_GAIN_UP              0x04fa
  53 #define RJ54N1_RA_SEL_UL                0x0530
  54 #define RJ54N1_BYTE_SWAP                0x0531
  55 #define RJ54N1_OUT_SIGPO                0x053b
  56 #define RJ54N1_WB_SEL_WEIGHT_I          0x054e
  57 #define RJ54N1_BIT8_WB                  0x0569
  58 #define RJ54N1_HCAPS_WB                 0x056a
  59 #define RJ54N1_VCAPS_WB                 0x056b
  60 #define RJ54N1_HCAPE_WB                 0x056c
  61 #define RJ54N1_VCAPE_WB                 0x056d
  62 #define RJ54N1_EXPOSURE_CONTROL         0x058c
  63 #define RJ54N1_FRAME_LENGTH_S_H         0x0595
  64 #define RJ54N1_FRAME_LENGTH_S_L         0x0596
  65 #define RJ54N1_FRAME_LENGTH_P_H         0x0597
  66 #define RJ54N1_FRAME_LENGTH_P_L         0x0598
  67 #define RJ54N1_PEAK_H                   0x05b7
  68 #define RJ54N1_PEAK_50                  0x05b8
  69 #define RJ54N1_PEAK_60                  0x05b9
  70 #define RJ54N1_PEAK_DIFF                0x05ba
  71 #define RJ54N1_IOC                      0x05ef
  72 #define RJ54N1_TG_BYPASS                0x0700
  73 #define RJ54N1_PLL_L                    0x0701
  74 #define RJ54N1_PLL_N                    0x0702
  75 #define RJ54N1_PLL_EN                   0x0704
  76 #define RJ54N1_RATIO_TG                 0x0706
  77 #define RJ54N1_RATIO_T                  0x0707
  78 #define RJ54N1_RATIO_R                  0x0708
  79 #define RJ54N1_RAMP_TGCLK_EN            0x0709
  80 #define RJ54N1_OCLK_DSP                 0x0710
  81 #define RJ54N1_RATIO_OP                 0x0711
  82 #define RJ54N1_RATIO_O                  0x0712
  83 #define RJ54N1_OCLK_SEL_EN              0x0713
  84 #define RJ54N1_CLK_RST                  0x0717
  85 #define RJ54N1_RESET_STANDBY            0x0718
  86 #define RJ54N1_FWFLG                    0x07fe
  87
  88 #define E_EXCLK                         (1 << 7)
  89 #define SOFT_STDBY                      (1 << 4)
  90 #define SEN_RSTX                        (1 << 2)
  91 #define TG_RSTX                         (1 << 1)
  92 #define DSP_RSTX                        (1 << 0)
  93
  94 #define RESIZE_HOLD_SEL                 (1 << 2)
  95 #define RESIZE_GO                       (1 << 1)
  96
  97 /*
  98  * When cropping, the camera automatically centers the cropped region, there
  99  * doesn't seem to be a way to specify an explicit location of the rectangle.
 100  */
 101 #define RJ54N1_COLUMN_SKIP              0
 102 #define RJ54N1_ROW_SKIP                 0
 103 #define RJ54N1_MAX_WIDTH                1600
 104 #define RJ54N1_MAX_HEIGHT               1200
 105
 106 #define PLL_L                           2
 107 #define PLL_N                           0x31
 108
 109 /* I2C addresses: 0x50, 0x51, 0x60, 0x61 */
 110
 111 /* RJ54N1CB0C has only one fixed colorspace per pixelcode */
 112 struct rj54n1_datafmt {
 113         enum v4l2_mbus_pixelcode        code;
 114         enum v4l2_colorspace            colorspace;
 115 };
 116
 117 /* Find a data format by a pixel code in an array */
 118 static const struct rj54n1_datafmt *rj54n1_find_datafmt(
 119         enum v4l2_mbus_pixelcode code, const struct rj54n1_datafmt *fmt,
 120         int n)
 121 {
 122         int i;
 123         for (i = 0; i < n; i++)
 124                 if (fmt[i].code == code)
 125                         return fmt + i;
 126
 127         return NULL;
 128 }
 129
 130 static const struct rj54n1_datafmt rj54n1_colour_fmts[] = {
 131         {V4L2_MBUS_FMT_YUYV8_2X8, V4L2_COLORSPACE_JPEG},
 132         {V4L2_MBUS_FMT_YVYU8_2X8, V4L2_COLORSPACE_JPEG},
 133         {V4L2_MBUS_FMT_RGB565_2X8_LE, V4L2_COLORSPACE_SRGB},
 134         {V4L2_MBUS_FMT_RGB565_2X8_BE, V4L2_COLORSPACE_SRGB},
 135         {V4L2_MBUS_FMT_SBGGR10_2X8_PADHI_LE, V4L2_COLORSPACE_SRGB},
 136         {V4L2_MBUS_FMT_SBGGR10_2X8_PADLO_LE, V4L2_COLORSPACE_SRGB},
 137         {V4L2_MBUS_FMT_SBGGR10_2X8_PADHI_BE, V4L2_COLORSPACE_SRGB},
 138         {V4L2_MBUS_FMT_SBGGR10_2X8_PADLO_BE, V4L2_COLORSPACE_SRGB},
 139         {V4L2_MBUS_FMT_SBGGR10_1X10, V4L2_COLORSPACE_SRGB},
 140 };
 141
 142 struct rj54n1_clock_div {
 143         u8 ratio_tg;    /* can be 0 or an odd number */
 144         u8 ratio_t;
 145         u8 ratio_r;
 146         u8 ratio_op;
 147         u8 ratio_o;
 148 };
 149
 150 struct rj54n1 {
 151         struct v4l2_subdev subdev;
 152         struct v4l2_ctrl_handler hdl;
 153         struct rj54n1_clock_div clk_div;
 154         const struct rj54n1_datafmt *fmt;
 155         struct v4l2_rect rect;  /* Sensor window */
 156         unsigned int tgclk_mhz;
 157         bool auto_wb;
 158         unsigned short width;   /* Output window */
 159         unsigned short height;
 160         unsigned short resize;  /* Sensor * 1024 / resize = Output */
 161         unsigned short scale;
 162         u8 bank;
 163 };
 164
 165 struct rj54n1_reg_val {
 166         u16 reg;
 167         u8 val;
 168 };
 169
 170 static const struct rj54n1_reg_val bank_4[] = {
 171         {0x417, 0},
 172         {0x42c, 0},
 173         {0x42d, 0xf0},
 174         {0x42e, 0},
 175         {0x42f, 0x50},
 176         {0x430, 0xf5},
 177         {0x431, 0x16},
 178         {0x432, 0x20},
 179         {0x433, 0},
 180         {0x434, 0xc8},
 181         {0x43c, 8},
 182         {0x43e, 0x90},
 183         {0x445, 0x83},
 184         {0x4ba, 0x58},
 185         {0x4bb, 4},
 186         {0x4bc, 0x20},
 187         {0x4db, 4},
 188         {0x4fe, 2},
 189 };
 190
 191 static const struct rj54n1_reg_val bank_5[] = {
 192         {0x514, 0},
 193         {0x516, 0},
 194         {0x518, 0},
 195         {0x51a, 0},
 196         {0x51d, 0xff},
 197         {0x56f, 0x28},
 198         {0x575, 0x40},
 199         {0x5bc, 0x48},
 200         {0x5c1, 6},
 201         {0x5e5, 0x11},
 202         {0x5e6, 0x43},
 203         {0x5e7, 0x33},
 204         {0x5e8, 0x21},
 205         {0x5e9, 0x30},
 206         {0x5ea, 0x0},
 207         {0x5eb, 0xa5},
 208         {0x5ec, 0xff},
 209         {0x5fe, 2},
 210 };
 211
 212 static const struct rj54n1_reg_val bank_7[] = {
 213         {0x70a, 0},
 214         {0x714, 0xff},
 215         {0x715, 0xff},
 216         {0x716, 0x1f},
 217         {0x7FE, 2},
 218 };
 219
 220 static const struct rj54n1_reg_val bank_8[] = {
 221         {0x800, 0x00},
 222         {0x801, 0x01},
 223         {0x802, 0x61},
 224         {0x805, 0x00},
 225         {0x806, 0x00},
 226         {0x807, 0x00},
 227         {0x808, 0x00},
 228         {0x809, 0x01},
 229         {0x80A, 0x61},
 230         {0x80B, 0x00},
 231         {0x80C, 0x01},
 232         {0x80D, 0x00},
 233         {0x80E, 0x00},
 234         {0x80F, 0x00},
 235         {0x810, 0x00},
 236         {0x811, 0x01},
 237         {0x812, 0x61},
 238         {0x813, 0x00},
 239         {0x814, 0x11},
 240         {0x815, 0x00},
 241         {0x816, 0x41},
 242         {0x817, 0x00},
 243         {0x818, 0x51},
 244         {0x819, 0x01},
 245         {0x81A, 0x1F},
 246         {0x81B, 0x00},
 247         {0x81C, 0x01},
 248         {0x81D, 0x00},
 249         {0x81E, 0x11},
 250         {0x81F, 0x00},
 251         {0x820, 0x41},
 252         {0x821, 0x00},
 253         {0x822, 0x51},
 254         {0x823, 0x00},
 255         {0x824, 0x00},
 256         {0x825, 0x00},
 257         {0x826, 0x47},
 258         {0x827, 0x01},
 259         {0x828, 0x4F},
 260         {0x829, 0x00},
 261         {0x82A, 0x00},
 262         {0x82B, 0x00},
 263         {0x82C, 0x30},
 264         {0x82D, 0x00},
 265         {0x82E, 0x40},
 266         {0x82F, 0x00},
 267         {0x830, 0xB3},
 268         {0x831, 0x00},
 269         {0x832, 0xE3},
 270         {0x833, 0x00},
 271         {0x834, 0x00},
 272         {0x835, 0x00},
 273         {0x836, 0x00},
 274         {0x837, 0x00},
 275         {0x838, 0x00},
 276         {0x839, 0x01},
 277         {0x83A, 0x61},
 278         {0x83B, 0x00},
 279         {0x83C, 0x01},
 280         {0x83D, 0x00},
 281         {0x83E, 0x00},
 282         {0x83F, 0x00},
 283         {0x840, 0x00},
 284         {0x841, 0x01},
 285         {0x842, 0x61},
 286         {0x843, 0x00},
 287         {0x844, 0x1D},
 288         {0x845, 0x00},
 289         {0x846, 0x00},
 290         {0x847, 0x00},
 291         {0x848, 0x00},
 292         {0x849, 0x01},
 293         {0x84A, 0x1F},
 294         {0x84B, 0x00},
 295         {0x84C, 0x05},
 296         {0x84D, 0x00},
 297         {0x84E, 0x19},
 298         {0x84F, 0x01},
 299         {0x850, 0x21},
 300         {0x851, 0x01},
 301         {0x852, 0x5D},
 302         {0x853, 0x00},
 303         {0x854, 0x00},
 304         {0x855, 0x00},
 305         {0x856, 0x19},
 306         {0x857, 0x01},
 307         {0x858, 0x21},
 308         {0x859, 0x00},
 309         {0x85A, 0x00},
 310         {0x85B, 0x00},
 311         {0x85C, 0x00},
 312         {0x85D, 0x00},
 313         {0x85E, 0x00},
 314         {0x85F, 0x00},
 315         {0x860, 0xB3},
 316         {0x861, 0x00},
 317         {0x862, 0xE3},
 318         {0x863, 0x00},
 319         {0x864, 0x00},
 320         {0x865, 0x00},
 321         {0x866, 0x00},
 322         {0x867, 0x00},
 323         {0x868, 0x00},
 324         {0x869, 0xE2},
 325         {0x86A, 0x00},
 326         {0x86B, 0x01},
 327         {0x86C, 0x06},
 328         {0x86D, 0x00},
 329         {0x86E, 0x00},
 330         {0x86F, 0x00},
 331         {0x870, 0x60},
 332         {0x871, 0x8C},
 333         {0x872, 0x10},
 334         {0x873, 0x00},
 335         {0x874, 0xE0},
 336         {0x875, 0x00},
 337         {0x876, 0x27},
 338         {0x877, 0x01},
 339         {0x878, 0x00},
 340         {0x879, 0x00},
 341         {0x87A, 0x00},
 342         {0x87B, 0x03},
 343         {0x87C, 0x00},
 344         {0x87D, 0x00},
 345         {0x87E, 0x00},
 346         {0x87F, 0x00},
 347         {0x880, 0x00},
 348         {0x881, 0x00},
 349         {0x882, 0x00},
 350         {0x883, 0x00},
 351         {0x884, 0x00},
 352         {0x885, 0x00},
 353         {0x886, 0xF8},
 354         {0x887, 0x00},
 355         {0x888, 0x03},
 356         {0x889, 0x00},
 357         {0x88A, 0x64},
 358         {0x88B, 0x00},
 359         {0x88C, 0x03},
 360         {0x88D, 0x00},
 361         {0x88E, 0xB1},
 362         {0x88F, 0x00},
 363         {0x890, 0x03},
 364         {0x891, 0x01},
 365         {0x892, 0x1D},
 366         {0x893, 0x00},
 367         {0x894, 0x03},
 368         {0x895, 0x01},
 369         {0x896, 0x4B},
 370         {0x897, 0x00},
 371         {0x898, 0xE5},
 372         {0x899, 0x00},
 373         {0x89A, 0x01},
 374         {0x89B, 0x00},
 375         {0x89C, 0x01},
 376         {0x89D, 0x04},
 377         {0x89E, 0xC8},
 378         {0x89F, 0x00},
 379         {0x8A0, 0x01},
 380         {0x8A1, 0x01},
 381         {0x8A2, 0x61},
 382         {0x8A3, 0x00},
 383         {0x8A4, 0x01},
 384         {0x8A5, 0x00},
 385         {0x8A6, 0x00},
 386         {0x8A7, 0x00},
 387         {0x8A8, 0x00},
 388         {0x8A9, 0x00},
 389         {0x8AA, 0x7F},
 390         {0x8AB, 0x03},
 391         {0x8AC, 0x00},
 392         {0x8AD, 0x00},
 393         {0x8AE, 0x00},
 394         {0x8AF, 0x00},
 395         {0x8B0, 0x00},
 396         {0x8B1, 0x00},
 397         {0x8B6, 0x00},
 398         {0x8B7, 0x01},
 399         {0x8B8, 0x00},
 400         {0x8B9, 0x00},
 401         {0x8BA, 0x02},
 402         {0x8BB, 0x00},
 403         {0x8BC, 0xFF},
 404         {0x8BD, 0x00},
 405         {0x8FE, 2},
 406 };
 407
 408 static const struct rj54n1_reg_val bank_10[] = {
 409         {0x10bf, 0x69}
 410 };
 411
 412 /* Clock dividers - these are default register values, divider = register + 1 */
 413 static const struct rj54n1_clock_div clk_div = {
 414         .ratio_tg       = 3 /* default: 5 */,
 415         .ratio_t        = 4 /* default: 1 */,
 416         .ratio_r        = 4 /* default: 0 */,
 417         .ratio_op       = 1 /* default: 5 */,
 418         .ratio_o        = 9 /* default: 0 */,
 419 };
 420
 421 static struct rj54n1 *to_rj54n1(const struct i2c_client *client)
 422 {
 423         return container_of(i2c_get_clientdata(client), struct rj54n1, subdev);
 424 }
 425
 426 static int reg_read(struct i2c_client *client, const u16 reg)
 427 {
 428         struct rj54n1 *rj54n1 = to_rj54n1(client);
 429         int ret;
 430
 431         /* set bank */
 432         if (rj54n1->bank != reg >> 8) {
 433                 dev_dbg(&client->dev, "[0x%x] = 0x%x\n", 0xff, reg >> 8);
 434                 ret = i2c_smbus_write_byte_data(client, 0xff, reg >> 8);
 435                 if (ret < 0)
 436                         return ret;
 437                 rj54n1->bank = reg >> 8;
 438         }
 439         return i2c_smbus_read_byte_data(client, reg & 0xff);
 440 }
 441
 442 static int reg_write(struct i2c_client *client, const u16 reg,
 443                      const u8 data)
 444 {
 445         struct rj54n1 *rj54n1 = to_rj54n1(client);
 446         int ret;
 447
 448         /* set bank */
 449         if (rj54n1->bank != reg >> 8) {
 450                 dev_dbg(&client->dev, "[0x%x] = 0x%x\n", 0xff, reg >> 8);
 451                 ret = i2c_smbus_write_byte_data(client, 0xff, reg >> 8);
 452                 if (ret < 0)
 453                         return ret;
 454                 rj54n1->bank = reg >> 8;
 455         }
 456         dev_dbg(&client->dev, "[0x%x] = 0x%x\n", reg & 0xff, data);
 457         return i2c_smbus_write_byte_data(client, reg & 0xff, data);
 458 }
 459
 460 static int reg_set(struct i2c_client *client, const u16 reg,
 461                    const u8 data, const u8 mask)
 462 {
 463         int ret;
 464
 465         ret = reg_read(client, reg);
 466         if (ret < 0)
 467                 return ret;
 468         return reg_write(client, reg, (ret & ~mask) | (data & mask));
 469 }
 470
 471 static int reg_write_multiple(struct i2c_client *client,
 472                               const struct rj54n1_reg_val *rv, const int n)
 473 {
 474         int i, ret;
 475
 476         for (i = 0; i < n; i++) {
 477                 ret = reg_write(client, rv->reg, rv->val);
 478                 if (ret < 0)
 479                         return ret;
 480                 rv++;
 481         }
 482
 483         return 0;
 484 }
 485
 486 static int rj54n1_enum_fmt(struct v4l2_subdev *sd, unsigned int index,
 487                            enum v4l2_mbus_pixelcode *code)
 488 {
 489         if (index >= ARRAY_SIZE(rj54n1_colour_fmts))
 490                 return -EINVAL;
 491
 492         *code = rj54n1_colour_fmts[index].code;
 493         return 0;
 494 }
 495
 496 static int rj54n1_s_stream(struct v4l2_subdev *sd, int enable)
 497 {
 498         struct i2c_client *client = v4l2_get_subdevdata(sd);
 499
 500         /* Switch between preview and still shot modes */
 501         return reg_set(client, RJ54N1_STILL_CONTROL, (!enable) << 7, 0x80);
 502 }
 503
 504 static int rj54n1_set_rect(struct i2c_client *client,
 505                            u16 reg_x, u16 reg_y, u16 reg_xy,
 506                            u32 width, u32 height)
 507 {
 508         int ret;
 509
 510         ret = reg_write(client, reg_xy,
 511                         ((width >> 4) & 0x70) |
 512                         ((height >> 8) & 7));
 513
 514         if (!ret)
 515                 ret = reg_write(client, reg_x, width & 0xff);
 516         if (!ret)
 517                 ret = reg_write(client, reg_y, height & 0xff);
 518
 519         return ret;
 520 }
 521
 522 /*
 523  * Some commands, specifically certain initialisation sequences, require
 524  * a commit operation.
 525  */
 526 static int rj54n1_commit(struct i2c_client *client)
 527 {
 528         int ret = reg_write(client, RJ54N1_INIT_START, 1);
 529         msleep(10);
 530         if (!ret)
 531                 ret = reg_write(client, RJ54N1_INIT_START, 0);
 532         return ret;
 533 }
 534
 535 static int rj54n1_sensor_scale(struct v4l2_subdev *sd, s32 *in_w, s32 *in_h,
 536                                s32 *out_w, s32 *out_h);
 537
 538 static int rj54n1_s_crop(struct v4l2_subdev *sd, struct v4l2_crop *a)
 539 {
 540         struct i2c_client *client = v4l2_get_subdevdata(sd);
 541         struct rj54n1 *rj54n1 = to_rj54n1(client);
 542         struct v4l2_rect *rect = &a->c;
 543         int dummy = 0, output_w, output_h,
 544                 input_w = rect->width, input_h = rect->height;
 545         int ret;
 546
 547         /* arbitrary minimum width and height, edges unimportant */
 548         soc_camera_limit_side(&dummy, &input_w,
 549                      RJ54N1_COLUMN_SKIP, 8, RJ54N1_MAX_WIDTH);
 550
 551         soc_camera_limit_side(&dummy, &input_h,
 552                      RJ54N1_ROW_SKIP, 8, RJ54N1_MAX_HEIGHT);
 553
 554         output_w = (input_w * 1024 + rj54n1->resize / 2) / rj54n1->resize;
 555         output_h = (input_h * 1024 + rj54n1->resize / 2) / rj54n1->resize;
 556
 557         dev_dbg(&client->dev, "Scaling for %dx%d : %u = %dx%d\n",
 558                 input_w, input_h, rj54n1->resize, output_w, output_h);
 559
 560         ret = rj54n1_sensor_scale(sd, &input_w, &input_h, &output_w, &output_h);
 561         if (ret < 0)
 562                 return ret;
 563
 564         rj54n1->width           = output_w;
 565         rj54n1->height          = output_h;
 566         rj54n1->resize          = ret;
 567         rj54n1->rect.width      = input_w;
 568         rj54n1->rect.height     = input_h;
 569
 570         return 0;
 571 }
 572
 573 static int rj54n1_g_crop(struct v4l2_subdev *sd, struct v4l2_crop *a)
 574 {
 575         struct i2c_client *client = v4l2_get_subdevdata(sd);
 576         struct rj54n1 *rj54n1 = to_rj54n1(client);
 577
 578         a->c    = rj54n1->rect;
 579         a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 580
 581         return 0;
 582 }
 583
 584 static int rj54n1_cropcap(struct v4l2_subdev *sd, struct v4l2_cropcap *a)
 585 {
 586         a->bounds.left                  = RJ54N1_COLUMN_SKIP;
 587         a->bounds.top                   = RJ54N1_ROW_SKIP;
 588         a->bounds.width                 = RJ54N1_MAX_WIDTH;
 589         a->bounds.height                = RJ54N1_MAX_HEIGHT;
 590         a->defrect                      = a->bounds;
 591         a->type                         = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 592         a->pixelaspect.numerator        = 1;
 593         a->pixelaspect.denominator      = 1;
 594
 595         return 0;
 596 }
 597
 598 static int rj54n1_g_fmt(struct v4l2_subdev *sd,
 599                         struct v4l2_mbus_framefmt *mf)
 600 {
 601         struct i2c_client *client = v4l2_get_subdevdata(sd);
 602         struct rj54n1 *rj54n1 = to_rj54n1(client);
 603
 604         mf->code        = rj54n1->fmt->code;
 605         mf->colorspace  = rj54n1->fmt->colorspace;
 606         mf->field       = V4L2_FIELD_NONE;
 607         mf->width       = rj54n1->width;
 608         mf->height      = rj54n1->height;
 609
 610         return 0;
 611 }
 612
 613 /*
 614  * The actual geometry configuration routine. It scales the input window into
 615  * the output one, updates the window sizes and returns an error or the resize
 616  * coefficient on success. Note: we only use the "Fixed Scaling" on this camera.
 617  */
 618 static int rj54n1_sensor_scale(struct v4l2_subdev *sd, s32 *in_w, s32 *in_h,
 619                                s32 *out_w, s32 *out_h)
 620 {
 621         struct i2c_client *client = v4l2_get_subdevdata(sd);
 622         struct rj54n1 *rj54n1 = to_rj54n1(client);
 623         unsigned int skip, resize, input_w = *in_w, input_h = *in_h,
 624                 output_w = *out_w, output_h = *out_h;
 625         u16 inc_sel, wb_bit8, wb_left, wb_right, wb_top, wb_bottom;
 626         unsigned int peak, peak_50, peak_60;
 627         int ret;
 628
 629         /*
 630          * We have a problem with crops, where the window is larger than 512x384
 631          * and output window is larger than a half of the input one. In this
 632          * case we have to either reduce the input window to equal or below
 633          * 512x384 or the output window to equal or below 1/2 of the input.
 634          */
 635         if (output_w > max(512U, input_w / 2)) {
 636                 if (2 * output_w > RJ54N1_MAX_WIDTH) {
 637                         input_w = RJ54N1_MAX_WIDTH;
 638                         output_w = RJ54N1_MAX_WIDTH / 2;
 639                 } else {
 640                         input_w = output_w * 2;
 641                 }
 642
 643                 dev_dbg(&client->dev, "Adjusted output width: in %u, out %u\n",
 644                         input_w, output_w);
 645         }
 646
 647         if (output_h > max(384U, input_h / 2)) {
 648                 if (2 * output_h > RJ54N1_MAX_HEIGHT) {
 649                         input_h = RJ54N1_MAX_HEIGHT;
 650                         output_h = RJ54N1_MAX_HEIGHT / 2;
 651                 } else {
 652                         input_h = output_h * 2;
 653                 }
 654
 655                 dev_dbg(&client->dev, "Adjusted output height: in %u, out %u\n",
 656                         input_h, output_h);
 657         }
 658
 659         /* Idea: use the read mode for snapshots, handle separate geometries */
 660         ret = rj54n1_set_rect(client, RJ54N1_X_OUTPUT_SIZE_S_L,
 661                               RJ54N1_Y_OUTPUT_SIZE_S_L,
 662                               RJ54N1_XY_OUTPUT_SIZE_S_H, output_w, output_h);
 663         if (!ret)
 664                 ret = rj54n1_set_rect(client, RJ54N1_X_OUTPUT_SIZE_P_L,
 665                               RJ54N1_Y_OUTPUT_SIZE_P_L,
 666                               RJ54N1_XY_OUTPUT_SIZE_P_H, output_w, output_h);
 667
 668         if (ret < 0)
 669                 return ret;
 670
 671         if (output_w > input_w && output_h > input_h) {
 672                 input_w = output_w;
 673                 input_h = output_h;
 674
 675                 resize = 1024;
 676         } else {
 677                 unsigned int resize_x, resize_y;
 678                 resize_x = (input_w * 1024 + output_w / 2) / output_w;
 679                 resize_y = (input_h * 1024 + output_h / 2) / output_h;
 680
 681                 /* We want max(resize_x, resize_y), check if it still fits */
 682                 if (resize_x > resize_y &&
 683                     (output_h * resize_x + 512) / 1024 > RJ54N1_MAX_HEIGHT)
 684                         resize = (RJ54N1_MAX_HEIGHT * 1024 + output_h / 2) /
 685                                 output_h;
 686                 else if (resize_y > resize_x &&
 687                          (output_w * resize_y + 512) / 1024 > RJ54N1_MAX_WIDTH)
 688                         resize = (RJ54N1_MAX_WIDTH * 1024 + output_w / 2) /
 689                                 output_w;
 690                 else
 691                         resize = max(resize_x, resize_y);
 692
 693                 /* Prohibited value ranges */
 694                 switch (resize) {
 695                 case 2040 ... 2047:
 696                         resize = 2039;
 697                         break;
 698                 case 4080 ... 4095:
 699                         resize = 4079;
 700                         break;
 701                 case 8160 ... 8191:
 702                         resize = 8159;
 703                         break;
 704                 case 16320 ... 16384:
 705                         resize = 16319;
 706                 }
 707         }
 708
 709         /* Set scaling */
 710         ret = reg_write(client, RJ54N1_RESIZE_HOLD_L, resize & 0xff);
 711         if (!ret)
 712                 ret = reg_write(client, RJ54N1_RESIZE_HOLD_H, resize >> 8);
 713
 714         if (ret < 0)
 715                 return ret;
 716
 717         /*
 718          * Configure a skipping bitmask. The sensor will select a skipping value
 719          * among set bits automatically. This is very unclear in the datasheet
 720          * too. I was told, in this register one enables all skipping values,
 721          * that are required for a specific resize, and the camera selects
 722          * automatically, which ones to use. But it is unclear how to identify,
 723          * which cropping values are needed. Secondly, why don't we just set all
 724          * bits and let the camera choose? Would it increase processing time and
 725          * reduce the framerate? Using 0xfffc for INC_USE_SEL doesn't seem to
 726          * improve the image quality or stability for larger frames (see comment
 727          * above), but I didn't check the framerate.
 728          */
 729         skip = min(resize / 1024, 15U);
 730
 731         inc_sel = 1 << skip;
 732
 733         if (inc_sel <= 2)
 734                 inc_sel = 0xc;
 735         else if (resize & 1023 && skip < 15)
 736                 inc_sel |= 1 << (skip + 1);
 737
 738         ret = reg_write(client, RJ54N1_INC_USE_SEL_L, inc_sel & 0xfc);
 739         if (!ret)
 740                 ret = reg_write(client, RJ54N1_INC_USE_SEL_H, inc_sel >> 8);
 741
 742         if (!rj54n1->auto_wb) {
 743                 /* Auto white balance window */
 744                 wb_left   = output_w / 16;
 745                 wb_right  = (3 * output_w / 4 - 3) / 4;
 746                 wb_top    = output_h / 16;
 747                 wb_bottom = (3 * output_h / 4 - 3) / 4;
 748                 wb_bit8   = ((wb_left >> 2) & 0x40) | ((wb_top >> 4) & 0x10) |
 749                         ((wb_right >> 6) & 4) | ((wb_bottom >> 8) & 1);
 750
 751                 if (!ret)
 752                         ret = reg_write(client, RJ54N1_BIT8_WB, wb_bit8);
 753                 if (!ret)
 754                         ret = reg_write(client, RJ54N1_HCAPS_WB, wb_left);
 755                 if (!ret)
 756                         ret = reg_write(client, RJ54N1_VCAPS_WB, wb_top);
 757                 if (!ret)
 758                         ret = reg_write(client, RJ54N1_HCAPE_WB, wb_right);
 759                 if (!ret)
 760                         ret = reg_write(client, RJ54N1_VCAPE_WB, wb_bottom);
 761         }
 762
 763         /* Antiflicker */
 764         peak = 12 * RJ54N1_MAX_WIDTH * (1 << 14) * resize / rj54n1->tgclk_mhz /
 765                 10000;
 766         peak_50 = peak / 6;
 767         peak_60 = peak / 5;
 768
 769         if (!ret)
 770                 ret = reg_write(client, RJ54N1_PEAK_H,
 771                                 ((peak_50 >> 4) & 0xf0) | (peak_60 >> 8));
 772         if (!ret)
 773                 ret = reg_write(client, RJ54N1_PEAK_50, peak_50);
 774         if (!ret)
 775                 ret = reg_write(client, RJ54N1_PEAK_60, peak_60);
 776         if (!ret)
 777                 ret = reg_write(client, RJ54N1_PEAK_DIFF, peak / 150);
 778
 779         /* Start resizing */
 780         if (!ret)
 781                 ret = reg_write(client, RJ54N1_RESIZE_CONTROL,
 782                                 RESIZE_HOLD_SEL | RESIZE_GO | 1);
 783
 784         if (ret < 0)
 785                 return ret;
 786
 787         /* Constant taken from manufacturer's example */
 788         msleep(230);
 789
 790         ret = reg_write(client, RJ54N1_RESIZE_CONTROL, RESIZE_HOLD_SEL | 1);
 791         if (ret < 0)
 792                 return ret;
 793
 794         *in_w = (output_w * resize + 512) / 1024;
 795         *in_h = (output_h * resize + 512) / 1024;
 796         *out_w = output_w;
 797         *out_h = output_h;
 798
 799         dev_dbg(&client->dev, "Scaled for %dx%d : %u = %ux%u, skip %u\n",
 800                 *in_w, *in_h, resize, output_w, output_h, skip);
 801
 802         return resize;
 803 }
 804
 805 static int rj54n1_set_clock(struct i2c_client *client)
 806 {
 807         struct rj54n1 *rj54n1 = to_rj54n1(client);
 808         int ret;
 809
 810         /* Enable external clock */
 811         ret = reg_write(client, RJ54N1_RESET_STANDBY, E_EXCLK | SOFT_STDBY);
 812         /* Leave stand-by. Note: use this when implementing suspend / resume */
 813         if (!ret)
 814                 ret = reg_write(client, RJ54N1_RESET_STANDBY, E_EXCLK);
 815
 816         if (!ret)
 817                 ret = reg_write(client, RJ54N1_PLL_L, PLL_L);
 818         if (!ret)
 819                 ret = reg_write(client, RJ54N1_PLL_N, PLL_N);
 820
 821         /* TGCLK dividers */
 822         if (!ret)
 823                 ret = reg_write(client, RJ54N1_RATIO_TG,
 824                                 rj54n1->clk_div.ratio_tg);
 825         if (!ret)
 826                 ret = reg_write(client, RJ54N1_RATIO_T,
 827                                 rj54n1->clk_div.ratio_t);
 828         if (!ret)
 829                 ret = reg_write(client, RJ54N1_RATIO_R,
 830                                 rj54n1->clk_div.ratio_r);
 831
 832         /* Enable TGCLK & RAMP */
 833         if (!ret)
 834                 ret = reg_write(client, RJ54N1_RAMP_TGCLK_EN, 3);
 835
 836         /* Disable clock output */
 837         if (!ret)
 838                 ret = reg_write(client, RJ54N1_OCLK_DSP, 0);
 839
 840         /* Set divisors */
 841         if (!ret)
 842                 ret = reg_write(client, RJ54N1_RATIO_OP,
 843                                 rj54n1->clk_div.ratio_op);
 844         if (!ret)
 845                 ret = reg_write(client, RJ54N1_RATIO_O,
 846                                 rj54n1->clk_div.ratio_o);
 847
 848         /* Enable OCLK */
 849         if (!ret)
 850                 ret = reg_write(client, RJ54N1_OCLK_SEL_EN, 1);
 851
 852         /* Use PLL for Timing Generator, write 2 to reserved bits */
 853         if (!ret)
 854                 ret = reg_write(client, RJ54N1_TG_BYPASS, 2);
 855
 856         /* Take sensor out of reset */
 857         if (!ret)
 858                 ret = reg_write(client, RJ54N1_RESET_STANDBY,
 859                                 E_EXCLK | SEN_RSTX);
 860         /* Enable PLL */
 861         if (!ret)
 862                 ret = reg_write(client, RJ54N1_PLL_EN, 1);
 863
 864         /* Wait for PLL to stabilise */
 865         msleep(10);
 866
 867         /* Enable clock to frequency divider */
 868         if (!ret)
 869                 ret = reg_write(client, RJ54N1_CLK_RST, 1);
 870
 871         if (!ret)
 872                 ret = reg_read(client, RJ54N1_CLK_RST);
 873         if (ret != 1) {
 874                 dev_err(&client->dev,
 875                         "Resetting RJ54N1CB0C clock failed: %d!\n", ret);
 876                 return -EIO;
 877         }
 878
 879         /* Start the PLL */
 880         ret = reg_set(client, RJ54N1_OCLK_DSP, 1, 1);
 881
 882         /* Enable OCLK */
 883         if (!ret)
 884                 ret = reg_write(client, RJ54N1_OCLK_SEL_EN, 1);
 885
 886         return ret;
 887 }
 888
 889 static int rj54n1_reg_init(struct i2c_client *client)
 890 {
 891         struct rj54n1 *rj54n1 = to_rj54n1(client);
 892         int ret = rj54n1_set_clock(client);
 893
 894         if (!ret)
 895                 ret = reg_write_multiple(client, bank_7, ARRAY_SIZE(bank_7));
 896         if (!ret)
 897                 ret = reg_write_multiple(client, bank_10, ARRAY_SIZE(bank_10));
 898
 899         /* Set binning divisors */
 900         if (!ret)
 901                 ret = reg_write(client, RJ54N1_SCALE_1_2_LEV, 3 | (7 << 4));
 902         if (!ret)
 903                 ret = reg_write(client, RJ54N1_SCALE_4_LEV, 0xf);
 904
 905         /* Switch to fixed resize mode */
 906         if (!ret)
 907                 ret = reg_write(client, RJ54N1_RESIZE_CONTROL,
 908                                 RESIZE_HOLD_SEL | 1);
 909
 910         /* Set gain */
 911         if (!ret)
 912                 ret = reg_write(client, RJ54N1_Y_GAIN, 0x84);
 913
 914         /*
 915          * Mirror the image back: default is upside down and left-to-right...
 916          * Set manual preview / still shot switching
 917          */
 918         if (!ret)
 919                 ret = reg_write(client, RJ54N1_MIRROR_STILL_MODE, 0x27);
 920
 921         if (!ret)
 922                 ret = reg_write_multiple(client, bank_4, ARRAY_SIZE(bank_4));
 923
 924         /* Auto exposure area */
 925         if (!ret)
 926                 ret = reg_write(client, RJ54N1_EXPOSURE_CONTROL, 0x80);
 927         /* Check current auto WB config */
 928         if (!ret)
 929                 ret = reg_read(client, RJ54N1_WB_SEL_WEIGHT_I);
 930         if (ret >= 0) {
 931                 rj54n1->auto_wb = ret & 0x80;
 932                 ret = reg_write_multiple(client, bank_5, ARRAY_SIZE(bank_5));
 933         }
 934         if (!ret)
 935                 ret = reg_write_multiple(client, bank_8, ARRAY_SIZE(bank_8));
 936
 937         if (!ret)
 938                 ret = reg_write(client, RJ54N1_RESET_STANDBY,
 939                                 E_EXCLK | DSP_RSTX | SEN_RSTX);
 940
 941         /* Commit init */
 942         if (!ret)
 943                 ret = rj54n1_commit(client);
 944
 945         /* Take DSP, TG, sensor out of reset */
 946         if (!ret)
 947                 ret = reg_write(client, RJ54N1_RESET_STANDBY,
 948                                 E_EXCLK | DSP_RSTX | TG_RSTX | SEN_RSTX);
 949
 950         /* Start register update? Same register as 0x?FE in many bank_* sets */
 951         if (!ret)
 952                 ret = reg_write(client, RJ54N1_FWFLG, 2);
 953
 954         /* Constant taken from manufacturer's example */
 955         msleep(700);
 956
 957         return ret;
 958 }
 959
 960 static int rj54n1_try_fmt(struct v4l2_subdev *sd,
 961                           struct v4l2_mbus_framefmt *mf)
 962 {
 963         struct i2c_client *client = v4l2_get_subdevdata(sd);
 964         struct rj54n1 *rj54n1 = to_rj54n1(client);
 965         const struct rj54n1_datafmt *fmt;
 966         int align = mf->code == V4L2_MBUS_FMT_SBGGR10_1X10 ||
 967                 mf->code == V4L2_MBUS_FMT_SBGGR10_2X8_PADHI_BE ||
 968                 mf->code == V4L2_MBUS_FMT_SBGGR10_2X8_PADLO_BE ||
 969                 mf->code == V4L2_MBUS_FMT_SBGGR10_2X8_PADHI_LE ||
 970                 mf->code == V4L2_MBUS_FMT_SBGGR10_2X8_PADLO_LE;
 971
 972         dev_dbg(&client->dev, "%s: code = %d, width = %u, height = %u\n",
 973                 __func__, mf->code, mf->width, mf->height);
 974
 975         fmt = rj54n1_find_datafmt(mf->code, rj54n1_colour_fmts,
 976                                   ARRAY_SIZE(rj54n1_colour_fmts));
 977         if (!fmt) {
 978                 fmt = rj54n1->fmt;
 979                 mf->code = fmt->code;
 980         }
 981
 982         mf->field       = V4L2_FIELD_NONE;
 983         mf->colorspace  = fmt->colorspace;
 984
 985         v4l_bound_align_image(&mf->width, 112, RJ54N1_MAX_WIDTH, align,
 986                               &mf->height, 84, RJ54N1_MAX_HEIGHT, align, 0);
 987
 988         return 0;
 989 }
 990
 991 static int rj54n1_s_fmt(struct v4l2_subdev *sd,
 992                         struct v4l2_mbus_framefmt *mf)
 993 {
 994         struct i2c_client *client = v4l2_get_subdevdata(sd);
 995         struct rj54n1 *rj54n1 = to_rj54n1(client);
 996         const struct rj54n1_datafmt *fmt;
 997         int output_w, output_h, max_w, max_h,
 998                 input_w = rj54n1->rect.width, input_h = rj54n1->rect.height;
 999         int ret;
1000
1001         /*
1002          * The host driver can call us without .try_fmt(), so, we have to take
1003          * care ourseleves
1004          */
1005         rj54n1_try_fmt(sd, mf);
1006
1007         /*
1008          * Verify if the sensor has just been powered on. TODO: replace this
1009          * with proper PM, when a suitable API is available.
1010          */
1011         ret = reg_read(client, RJ54N1_RESET_STANDBY);
1012         if (ret < 0)
1013                 return ret;
1014
1015         if (!(ret & E_EXCLK)) {
1016                 ret = rj54n1_reg_init(client);
1017                 if (ret < 0)
1018                         return ret;
1019         }
1020
1021         dev_dbg(&client->dev, "%s: code = %d, width = %u, height = %u\n",
1022                 __func__, mf->code, mf->width, mf->height);
1023
1024         /* RA_SEL_UL is only relevant for raw modes, ignored otherwise. */
1025         switch (mf->code) {
1026         case V4L2_MBUS_FMT_YUYV8_2X8:
1027                 ret = reg_write(client, RJ54N1_OUT_SEL, 0);
1028                 if (!ret)
1029                         ret = reg_set(client, RJ54N1_BYTE_SWAP, 8, 8);
1030                 break;
1031         case V4L2_MBUS_FMT_YVYU8_2X8:
1032                 ret = reg_write(client, RJ54N1_OUT_SEL, 0);
1033                 if (!ret)
1034                         ret = reg_set(client, RJ54N1_BYTE_SWAP, 0, 8);
1035                 break;
1036         case V4L2_MBUS_FMT_RGB565_2X8_LE:
1037                 ret = reg_write(client, RJ54N1_OUT_SEL, 0x11);
1038                 if (!ret)
1039                         ret = reg_set(client, RJ54N1_BYTE_SWAP, 8, 8);
1040                 break;
1041         case V4L2_MBUS_FMT_RGB565_2X8_BE:
1042                 ret = reg_write(client, RJ54N1_OUT_SEL, 0x11);
1043                 if (!ret)
1044                         ret = reg_set(client, RJ54N1_BYTE_SWAP, 0, 8);
1045                 break;
1046         case V4L2_MBUS_FMT_SBGGR10_2X8_PADLO_LE:
1047                 ret = reg_write(client, RJ54N1_OUT_SEL, 4);
1048                 if (!ret)
1049                         ret = reg_set(client, RJ54N1_BYTE_SWAP, 8, 8);
1050                 if (!ret)
1051                         ret = reg_write(client, RJ54N1_RA_SEL_UL, 0);
1052                 break;
1053         case V4L2_MBUS_FMT_SBGGR10_2X8_PADHI_LE:
1054                 ret = reg_write(client, RJ54N1_OUT_SEL, 4);
1055                 if (!ret)
1056                         ret = reg_set(client, RJ54N1_BYTE_SWAP, 8, 8);
1057                 if (!ret)
1058                         ret = reg_write(client, RJ54N1_RA_SEL_UL, 8);
1059                 break;
1060         case V4L2_MBUS_FMT_SBGGR10_2X8_PADLO_BE:
1061                 ret = reg_write(client, RJ54N1_OUT_SEL, 4);
1062                 if (!ret)
1063                         ret = reg_set(client, RJ54N1_BYTE_SWAP, 0, 8);
1064                 if (!ret)
1065                         ret = reg_write(client, RJ54N1_RA_SEL_UL, 0);
1066                 break;
1067         case V4L2_MBUS_FMT_SBGGR10_2X8_PADHI_BE:
1068                 ret = reg_write(client, RJ54N1_OUT_SEL, 4);
1069                 if (!ret)
1070                         ret = reg_set(client, RJ54N1_BYTE_SWAP, 0, 8);
1071                 if (!ret)
1072                         ret = reg_write(client, RJ54N1_RA_SEL_UL, 8);
1073                 break;
1074         case V4L2_MBUS_FMT_SBGGR10_1X10:
1075                 ret = reg_write(client, RJ54N1_OUT_SEL, 5);
1076                 break;
1077         default:
1078                 ret = -EINVAL;
1079         }
1080
1081         /* Special case: a raw mode with 10 bits of data per clock tick */
1082         if (!ret)
1083                 ret = reg_set(client, RJ54N1_OCLK_SEL_EN,
1084                               (mf->code == V4L2_MBUS_FMT_SBGGR10_1X10) << 1, 2);
1085
1086         if (ret < 0)
1087                 return ret;
1088
1089         /* Supported scales 1:1 >= scale > 1:16 */
1090         max_w = mf->width * (16 * 1024 - 1) / 1024;
1091         if (input_w > max_w)
1092                 input_w = max_w;
1093         max_h = mf->height * (16 * 1024 - 1) / 1024;
1094         if (input_h > max_h)
1095                 input_h = max_h;
1096
1097         output_w = mf->width;
1098         output_h = mf->height;
1099
1100         ret = rj54n1_sensor_scale(sd, &input_w, &input_h, &output_w, &output_h);
1101         if (ret < 0)
1102                 return ret;
1103
1104         fmt = rj54n1_find_datafmt(mf->code, rj54n1_colour_fmts,
1105                                   ARRAY_SIZE(rj54n1_colour_fmts));
1106
1107         rj54n1->fmt             = fmt;
1108         rj54n1->resize          = ret;
1109         rj54n1->rect.width      = input_w;
1110         rj54n1->rect.height     = input_h;
1111         rj54n1->width           = output_w;
1112         rj54n1->height          = output_h;
1113
1114         mf->width               = output_w;
1115         mf->height              = output_h;
1116         mf->field               = V4L2_FIELD_NONE;
1117         mf->colorspace          = fmt->colorspace;
1118
1119         return 0;
1120 }
1121
1122 static int rj54n1_g_chip_ident(struct v4l2_subdev *sd,
1123                                struct v4l2_dbg_chip_ident *id)
1124 {
1125         struct i2c_client *client = v4l2_get_subdevdata(sd);
1126
1127         if (id->match.type != V4L2_CHIP_MATCH_I2C_ADDR)
1128                 return -EINVAL;
1129
1130         if (id->match.addr != client->addr)
1131                 return -ENODEV;
1132
1133         id->ident       = V4L2_IDENT_RJ54N1CB0C;
1134         id->revision    = 0;
1135
1136         return 0;
1137 }
1138
1139 #ifdef CONFIG_VIDEO_ADV_DEBUG
1140 static int rj54n1_g_register(struct v4l2_subdev *sd,
1141                              struct v4l2_dbg_register *reg)
1142 {
1143         struct i2c_client *client = v4l2_get_subdevdata(sd);
1144
1145         if (reg->match.type != V4L2_CHIP_MATCH_I2C_ADDR ||
1146             reg->reg < 0x400 || reg->reg > 0x1fff)
1147                 /* Registers > 0x0800 are only available from Sharp support */
1148                 return -EINVAL;
1149
1150         if (reg->match.addr != client->addr)
1151                 return -ENODEV;
1152
1153         reg->size = 1;
1154         reg->val = reg_read(client, reg->reg);
1155
1156         if (reg->val > 0xff)
1157                 return -EIO;
1158
1159         return 0;
1160 }
1161
1162 static int rj54n1_s_register(struct v4l2_subdev *sd,
1163                              struct v4l2_dbg_register *reg)
1164 {
1165         struct i2c_client *client = v4l2_get_subdevdata(sd);
1166
1167         if (reg->match.type != V4L2_CHIP_MATCH_I2C_ADDR ||
1168             reg->reg < 0x400 || reg->reg > 0x1fff)
1169                 /* Registers >= 0x0800 are only available from Sharp support */
1170                 return -EINVAL;
1171
1172         if (reg->match.addr != client->addr)
1173                 return -ENODEV;
1174
1175         if (reg_write(client, reg->reg, reg->val) < 0)
1176                 return -EIO;
1177
1178         return 0;
1179 }
1180 #endif
1181
1182 static int rj54n1_s_ctrl(struct v4l2_ctrl *ctrl)
1183 {
1184         struct rj54n1 *rj54n1 = container_of(ctrl->handler, struct rj54n1, hdl);
1185         struct v4l2_subdev *sd = &rj54n1->subdev;
1186         struct i2c_client *client = v4l2_get_subdevdata(sd);
1187         int data;
1188
1189         switch (ctrl->id) {
1190         case V4L2_CID_VFLIP:
1191                 if (ctrl->val)
1192                         data = reg_set(client, RJ54N1_MIRROR_STILL_MODE, 0, 1);
1193                 else
1194                         data = reg_set(client, RJ54N1_MIRROR_STILL_MODE, 1, 1);
1195                 if (data < 0)
1196                         return -EIO;
1197                 return 0;
1198         case V4L2_CID_HFLIP:
1199                 if (ctrl->val)
1200                         data = reg_set(client, RJ54N1_MIRROR_STILL_MODE, 0, 2);
1201                 else
1202                         data = reg_set(client, RJ54N1_MIRROR_STILL_MODE, 2, 2);
1203                 if (data < 0)
1204                         return -EIO;
1205                 return 0;
1206         case V4L2_CID_GAIN:
1207                 if (reg_write(client, RJ54N1_Y_GAIN, ctrl->val * 2) < 0)
1208                         return -EIO;
1209                 return 0;
1210         case V4L2_CID_AUTO_WHITE_BALANCE:
1211                 /* Auto WB area - whole image */
1212                 if (reg_set(client, RJ54N1_WB_SEL_WEIGHT_I, ctrl->val << 7,
1213                             0x80) < 0)
1214                         return -EIO;
1215                 rj54n1->auto_wb = ctrl->val;
1216                 return 0;
1217         }
1218
1219         return -EINVAL;
1220 }
1221
1222 static const struct v4l2_ctrl_ops rj54n1_ctrl_ops = {
1223         .s_ctrl = rj54n1_s_ctrl,
1224 };
1225
1226 static struct v4l2_subdev_core_ops rj54n1_subdev_core_ops = {
1227         .g_chip_ident   = rj54n1_g_chip_ident,
1228 #ifdef CONFIG_VIDEO_ADV_DEBUG
1229         .g_register     = rj54n1_g_register,
1230         .s_register     = rj54n1_s_register,
1231 #endif
1232 };
1233
1234 static int rj54n1_g_mbus_config(struct v4l2_subdev *sd,
1235                                 struct v4l2_mbus_config *cfg)
1236 {
1237         struct i2c_client *client = v4l2_get_subdevdata(sd);
1238         struct soc_camera_link *icl = soc_camera_i2c_to_link(client);
1239
1240         cfg->flags =
1241                 V4L2_MBUS_PCLK_SAMPLE_RISING | V4L2_MBUS_PCLK_SAMPLE_FALLING |
1242                 V4L2_MBUS_MASTER | V4L2_MBUS_DATA_ACTIVE_HIGH |
1243                 V4L2_MBUS_HSYNC_ACTIVE_HIGH | V4L2_MBUS_VSYNC_ACTIVE_HIGH;
1244         cfg->type = V4L2_MBUS_PARALLEL;
1245         cfg->flags = soc_camera_apply_board_flags(icl, cfg);
1246
1247         return 0;
1248 }
1249
1250 static int rj54n1_s_mbus_config(struct v4l2_subdev *sd,
1251                                 const struct v4l2_mbus_config *cfg)
1252 {
1253         struct i2c_client *client = v4l2_get_subdevdata(sd);
1254         struct soc_camera_link *icl = soc_camera_i2c_to_link(client);
1255
1256         /* Figures 2.5-1 to 2.5-3 - default falling pixclk edge */
1257         if (soc_camera_apply_board_flags(icl, cfg) &
1258             V4L2_MBUS_PCLK_SAMPLE_RISING)
1259                 return reg_write(client, RJ54N1_OUT_SIGPO, 1 << 4);
1260         else
1261                 return reg_write(client, RJ54N1_OUT_SIGPO, 0);
1262 }
1263
1264 static struct v4l2_subdev_video_ops rj54n1_subdev_video_ops = {
1265         .s_stream       = rj54n1_s_stream,
1266         .s_mbus_fmt     = rj54n1_s_fmt,
1267         .g_mbus_fmt     = rj54n1_g_fmt,
1268         .try_mbus_fmt   = rj54n1_try_fmt,
1269         .enum_mbus_fmt  = rj54n1_enum_fmt,
1270         .g_crop         = rj54n1_g_crop,
1271         .s_crop         = rj54n1_s_crop,
1272         .cropcap        = rj54n1_cropcap,
1273         .g_mbus_config  = rj54n1_g_mbus_config,
1274         .s_mbus_config  = rj54n1_s_mbus_config,
1275 };
1276
1277 static struct v4l2_subdev_ops rj54n1_subdev_ops = {
1278         .core   = &rj54n1_subdev_core_ops,
1279         .video  = &rj54n1_subdev_video_ops,
1280 };
1281
1282 /*
1283  * Interface active, can use i2c. If it fails, it can indeed mean, that
1284  * this wasn't our capture interface, so, we wait for the right one
1285  */
1286 static int rj54n1_video_probe(struct i2c_client *client,
1287                               struct rj54n1_pdata *priv)
1288 {
1289         int data1, data2;
1290         int ret;
1291
1292         /* Read out the chip version register */
1293         data1 = reg_read(client, RJ54N1_DEV_CODE);
1294         data2 = reg_read(client, RJ54N1_DEV_CODE2);
1295
1296         if (data1 != 0x51 || data2 != 0x10) {
1297                 ret = -ENODEV;
1298                 dev_info(&client->dev, "No RJ54N1CB0C found, read 0x%x:0x%x\n",
1299                          data1, data2);
1300                 goto ei2c;
1301         }
1302
1303         /* Configure IOCTL polarity from the platform data: 0 or 1 << 7. */
1304         ret = reg_write(client, RJ54N1_IOC, priv->ioctl_high << 7);
1305         if (ret < 0)
1306                 goto ei2c;
1307
1308         dev_info(&client->dev, "Detected a RJ54N1CB0C chip ID 0x%x:0x%x\n",
1309                  data1, data2);
1310
1311 ei2c:
1312         return ret;
1313 }
1314
1315 static int rj54n1_probe(struct i2c_client *client,
1316                         const struct i2c_device_id *did)
1317 {
1318         struct rj54n1 *rj54n1;
1319         struct soc_camera_link *icl = soc_camera_i2c_to_link(client);
1320         struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent);
1321         struct rj54n1_pdata *rj54n1_priv;
1322         int ret;
1323
1324         if (!icl || !icl->priv) {
1325                 dev_err(&client->dev, "RJ54N1CB0C: missing platform data!\n");
1326                 return -EINVAL;
1327         }
1328
1329         rj54n1_priv = icl->priv;
1330
1331         if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) {
1332                 dev_warn(&adapter->dev,
1333                          "I2C-Adapter doesn't support I2C_FUNC_SMBUS_BYTE\n");
1334                 return -EIO;
1335         }
1336
1337         rj54n1 = kzalloc(sizeof(struct rj54n1), GFP_KERNEL);
1338         if (!rj54n1)
1339                 return -ENOMEM;
1340
1341         v4l2_i2c_subdev_init(&rj54n1->subdev, client, &rj54n1_subdev_ops);
1342         v4l2_ctrl_handler_init(&rj54n1->hdl, 4);
1343         v4l2_ctrl_new_std(&rj54n1->hdl, &rj54n1_ctrl_ops,
1344                         V4L2_CID_VFLIP, 0, 1, 1, 0);
1345         v4l2_ctrl_new_std(&rj54n1->hdl, &rj54n1_ctrl_ops,
1346                         V4L2_CID_HFLIP, 0, 1, 1, 0);
1347         v4l2_ctrl_new_std(&rj54n1->hdl, &rj54n1_ctrl_ops,
1348                         V4L2_CID_GAIN, 0, 127, 1, 66);
1349         v4l2_ctrl_new_std(&rj54n1->hdl, &rj54n1_ctrl_ops,
1350                         V4L2_CID_AUTO_WHITE_BALANCE, 0, 1, 1, 1);
1351         rj54n1->subdev.ctrl_handler = &rj54n1->hdl;
1352         if (rj54n1->hdl.error) {
1353                 int err = rj54n1->hdl.error;
1354
1355                 kfree(rj54n1);
1356                 return err;
1357         }
1358
1359         rj54n1->clk_div         = clk_div;
1360         rj54n1->rect.left       = RJ54N1_COLUMN_SKIP;
1361         rj54n1->rect.top        = RJ54N1_ROW_SKIP;
1362         rj54n1->rect.width      = RJ54N1_MAX_WIDTH;
1363         rj54n1->rect.height     = RJ54N1_MAX_HEIGHT;
1364         rj54n1->width           = RJ54N1_MAX_WIDTH;
1365         rj54n1->height          = RJ54N1_MAX_HEIGHT;
1366         rj54n1->fmt             = &rj54n1_colour_fmts[0];
1367         rj54n1->resize          = 1024;
1368         rj54n1->tgclk_mhz       = (rj54n1_priv->mclk_freq / PLL_L * PLL_N) /
1369                 (clk_div.ratio_tg + 1) / (clk_div.ratio_t + 1);
1370
1371         ret = rj54n1_video_probe(client, rj54n1_priv);
1372         if (ret < 0) {
1373                 v4l2_ctrl_handler_free(&rj54n1->hdl);
1374                 kfree(rj54n1);
1375                 return ret;
1376         }
1377         return v4l2_ctrl_handler_setup(&rj54n1->hdl);
1378 }
1379
1380 static int rj54n1_remove(struct i2c_client *client)
1381 {
1382         struct rj54n1 *rj54n1 = to_rj54n1(client);
1383         struct soc_camera_link *icl = soc_camera_i2c_to_link(client);
1384
1385         v4l2_device_unregister_subdev(&rj54n1->subdev);
1386         if (icl->free_bus)
1387                 icl->free_bus(icl);
1388         v4l2_ctrl_handler_free(&rj54n1->hdl);
1389         kfree(rj54n1);
1390
1391         return 0;
1392 }
1393
1394 static const struct i2c_device_id rj54n1_id[] = {
1395         { "rj54n1cb0c", 0 },
1396         { }
1397 };
1398 MODULE_DEVICE_TABLE(i2c, rj54n1_id);
1399
1400 static struct i2c_driver rj54n1_i2c_driver = {
1401         .driver = {
1402                 .name = "rj54n1cb0c",
1403         },
1404         .probe          = rj54n1_probe,
1405         .remove         = rj54n1_remove,
1406         .id_table       = rj54n1_id,
1407 };
1408
1409 static int __init rj54n1_mod_init(void)
1410 {
1411         return i2c_add_driver(&rj54n1_i2c_driver);
1412 }
1413
1414 static void __exit rj54n1_mod_exit(void)
1415 {
1416         i2c_del_driver(&rj54n1_i2c_driver);
1417 }
1418
1419 module_init(rj54n1_mod_init);
1420 module_exit(rj54n1_mod_exit);
1421
1422 MODULE_DESCRIPTION("Sharp RJ54N1CB0C Camera driver");
1423 MODULE_AUTHOR("Guennadi Liakhovetski <g.liakhovetski@gmx.de>");
1424 MODULE_LICENSE("GPL v2");