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

   1 /*
   2  * Driver for RJ54N1CB0C CMOS Image Sensor from Sharp
   3  *
   4  * Copyright (C) 2009, Guennadi Liakhovetski <g.liakhovetski@gmx.de>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 as
   8  * published by the Free Software Foundation.
   9  */
  10
  11 #include <linux/delay.h>
  12 #include <linux/i2c.h>
  13 #include <linux/slab.h>
  14 #include <linux/v4l2-mediabus.h>
  15 #include <linux/videodev2.h>
  16 #include <linux/module.h>
  17
  18 #include <media/rj54n1cb0c.h>
  19 #include <media/soc_camera.h>
  20 #include <media/v4l2-clk.h>
  21 #include <media/v4l2-subdev.h>
  22 #include <media/v4l2-ctrls.h>
  23
  24 #define RJ54N1_DEV_CODE                 0x0400
  25 #define RJ54N1_DEV_CODE2                0x0401
  26 #define RJ54N1_OUT_SEL                  0x0403
  27 #define RJ54N1_XY_OUTPUT_SIZE_S_H       0x0404
  28 #define RJ54N1_X_OUTPUT_SIZE_S_L        0x0405
  29 #define RJ54N1_Y_OUTPUT_SIZE_S_L        0x0406
  30 #define RJ54N1_XY_OUTPUT_SIZE_P_H       0x0407
  31 #define RJ54N1_X_OUTPUT_SIZE_P_L        0x0408
  32 #define RJ54N1_Y_OUTPUT_SIZE_P_L        0x0409
  33 #define RJ54N1_LINE_LENGTH_PCK_S_H      0x040a
  34 #define RJ54N1_LINE_LENGTH_PCK_S_L      0x040b
  35 #define RJ54N1_LINE_LENGTH_PCK_P_H      0x040c
  36 #define RJ54N1_LINE_LENGTH_PCK_P_L      0x040d
  37 #define RJ54N1_RESIZE_N                 0x040e
  38 #define RJ54N1_RESIZE_N_STEP            0x040f
  39 #define RJ54N1_RESIZE_STEP              0x0410
  40 #define RJ54N1_RESIZE_HOLD_H            0x0411
  41 #define RJ54N1_RESIZE_HOLD_L            0x0412
  42 #define RJ54N1_H_OBEN_OFS               0x0413
  43 #define RJ54N1_V_OBEN_OFS               0x0414
  44 #define RJ54N1_RESIZE_CONTROL           0x0415
  45 #define RJ54N1_STILL_CONTROL            0x0417
  46 #define RJ54N1_INC_USE_SEL_H            0x0425
  47 #define RJ54N1_INC_USE_SEL_L            0x0426
  48 #define RJ54N1_MIRROR_STILL_MODE        0x0427
  49 #define RJ54N1_INIT_START               0x0428
  50 #define RJ54N1_SCALE_1_2_LEV            0x0429
  51 #define RJ54N1_SCALE_4_LEV              0x042a
  52 #define RJ54N1_Y_GAIN                   0x04d8
  53 #define RJ54N1_APT_GAIN_UP              0x04fa
  54 #define RJ54N1_RA_SEL_UL                0x0530
  55 #define RJ54N1_BYTE_SWAP                0x0531
  56 #define RJ54N1_OUT_SIGPO                0x053b
  57 #define RJ54N1_WB_SEL_WEIGHT_I          0x054e
  58 #define RJ54N1_BIT8_WB                  0x0569
  59 #define RJ54N1_HCAPS_WB                 0x056a
  60 #define RJ54N1_VCAPS_WB                 0x056b
  61 #define RJ54N1_HCAPE_WB                 0x056c
  62 #define RJ54N1_VCAPE_WB                 0x056d
  63 #define RJ54N1_EXPOSURE_CONTROL         0x058c
  64 #define RJ54N1_FRAME_LENGTH_S_H         0x0595
  65 #define RJ54N1_FRAME_LENGTH_S_L         0x0596
  66 #define RJ54N1_FRAME_LENGTH_P_H         0x0597
  67 #define RJ54N1_FRAME_LENGTH_P_L         0x0598
  68 #define RJ54N1_PEAK_H                   0x05b7
  69 #define RJ54N1_PEAK_50                  0x05b8
  70 #define RJ54N1_PEAK_60                  0x05b9
  71 #define RJ54N1_PEAK_DIFF                0x05ba
  72 #define RJ54N1_IOC                      0x05ef
  73 #define RJ54N1_TG_BYPASS                0x0700
  74 #define RJ54N1_PLL_L                    0x0701
  75 #define RJ54N1_PLL_N                    0x0702
  76 #define RJ54N1_PLL_EN                   0x0704
  77 #define RJ54N1_RATIO_TG                 0x0706
  78 #define RJ54N1_RATIO_T                  0x0707
  79 #define RJ54N1_RATIO_R                  0x0708
  80 #define RJ54N1_RAMP_TGCLK_EN            0x0709
  81 #define RJ54N1_OCLK_DSP                 0x0710
  82 #define RJ54N1_RATIO_OP                 0x0711
  83 #define RJ54N1_RATIO_O                  0x0712
  84 #define RJ54N1_OCLK_SEL_EN              0x0713
  85 #define RJ54N1_CLK_RST                  0x0717
  86 #define RJ54N1_RESET_STANDBY            0x0718
  87 #define RJ54N1_FWFLG                    0x07fe
  88
  89 #define E_EXCLK                         (1 << 7)
  90 #define SOFT_STDBY                      (1 << 4)
  91 #define SEN_RSTX                        (1 << 2)
  92 #define TG_RSTX                         (1 << 1)
  93 #define DSP_RSTX                        (1 << 0)
  94
  95 #define RESIZE_HOLD_SEL                 (1 << 2)
  96 #define RESIZE_GO                       (1 << 1)
  97
  98 /*
  99  * When cropping, the camera automatically centers the cropped region, there
 100  * doesn't seem to be a way to specify an explicit location of the rectangle.
 101  */
 102 #define RJ54N1_COLUMN_SKIP              0
 103 #define RJ54N1_ROW_SKIP                 0
 104 #define RJ54N1_MAX_WIDTH                1600
 105 #define RJ54N1_MAX_HEIGHT               1200
 106
 107 #define PLL_L                           2
 108 #define PLL_N                           0x31
 109
 110 /* I2C addresses: 0x50, 0x51, 0x60, 0x61 */
 111
 112 /* RJ54N1CB0C has only one fixed colorspace per pixelcode */
 113 struct rj54n1_datafmt {
 114         u32     code;
 115         enum v4l2_colorspace            colorspace;
 116 };
 117
 118 /* Find a data format by a pixel code in an array */
 119 static const struct rj54n1_datafmt *rj54n1_find_datafmt(
 120         u32 code, const struct rj54n1_datafmt *fmt,
 121         int n)
 122 {
 123         int i;
 124         for (i = 0; i < n; i++)
 125                 if (fmt[i].code == code)
 126                         return fmt + i;
 127
 128         return NULL;
 129 }
 130
 131 static const struct rj54n1_datafmt rj54n1_colour_fmts[] = {
 132         {MEDIA_BUS_FMT_YUYV8_2X8, V4L2_COLORSPACE_JPEG},
 133         {MEDIA_BUS_FMT_YVYU8_2X8, V4L2_COLORSPACE_JPEG},
 134         {MEDIA_BUS_FMT_RGB565_2X8_LE, V4L2_COLORSPACE_SRGB},
 135         {MEDIA_BUS_FMT_RGB565_2X8_BE, V4L2_COLORSPACE_SRGB},
 136         {MEDIA_BUS_FMT_SBGGR10_2X8_PADHI_LE, V4L2_COLORSPACE_SRGB},
 137         {MEDIA_BUS_FMT_SBGGR10_2X8_PADLO_LE, V4L2_COLORSPACE_SRGB},
 138         {MEDIA_BUS_FMT_SBGGR10_2X8_PADHI_BE, V4L2_COLORSPACE_SRGB},
 139         {MEDIA_BUS_FMT_SBGGR10_2X8_PADLO_BE, V4L2_COLORSPACE_SRGB},
 140         {MEDIA_BUS_FMT_SBGGR10_1X10, V4L2_COLORSPACE_SRGB},
 141 };
 142
 143 struct rj54n1_clock_div {
 144         u8 ratio_tg;    /* can be 0 or an odd number */
 145         u8 ratio_t;
 146         u8 ratio_r;
 147         u8 ratio_op;
 148         u8 ratio_o;
 149 };
 150
 151 struct rj54n1 {
 152         struct v4l2_subdev subdev;
 153         struct v4l2_ctrl_handler hdl;
 154         struct v4l2_clk *clk;
 155         struct rj54n1_clock_div clk_div;
 156         const struct rj54n1_datafmt *fmt;
 157         struct v4l2_rect rect;  /* Sensor window */
 158         unsigned int tgclk_mhz;
 159         bool auto_wb;
 160         unsigned short width;   /* Output window */
 161         unsigned short height;
 162         unsigned short resize;  /* Sensor * 1024 / resize = Output */
 163         unsigned short scale;
 164         u8 bank;
 165 };
 166
 167 struct rj54n1_reg_val {
 168         u16 reg;
 169         u8 val;
 170 };
 171
 172 static const struct rj54n1_reg_val bank_4[] = {
 173         {0x417, 0},
 174         {0x42c, 0},
 175         {0x42d, 0xf0},
 176         {0x42e, 0},
 177         {0x42f, 0x50},
 178         {0x430, 0xf5},
 179         {0x431, 0x16},
 180         {0x432, 0x20},
 181         {0x433, 0},
 182         {0x434, 0xc8},
 183         {0x43c, 8},
 184         {0x43e, 0x90},
 185         {0x445, 0x83},
 186         {0x4ba, 0x58},
 187         {0x4bb, 4},
 188         {0x4bc, 0x20},
 189         {0x4db, 4},
 190         {0x4fe, 2},
 191 };
 192
 193 static const struct rj54n1_reg_val bank_5[] = {
 194         {0x514, 0},
 195         {0x516, 0},
 196         {0x518, 0},
 197         {0x51a, 0},
 198         {0x51d, 0xff},
 199         {0x56f, 0x28},
 200         {0x575, 0x40},
 201         {0x5bc, 0x48},
 202         {0x5c1, 6},
 203         {0x5e5, 0x11},
 204         {0x5e6, 0x43},
 205         {0x5e7, 0x33},
 206         {0x5e8, 0x21},
 207         {0x5e9, 0x30},
 208         {0x5ea, 0x0},
 209         {0x5eb, 0xa5},
 210         {0x5ec, 0xff},
 211         {0x5fe, 2},
 212 };
 213
 214 static const struct rj54n1_reg_val bank_7[] = {
 215         {0x70a, 0},
 216         {0x714, 0xff},
 217         {0x715, 0xff},
 218         {0x716, 0x1f},
 219         {0x7FE, 2},
 220 };
 221
 222 static const struct rj54n1_reg_val bank_8[] = {
 223         {0x800, 0x00},
 224         {0x801, 0x01},
 225         {0x802, 0x61},
 226         {0x805, 0x00},
 227         {0x806, 0x00},
 228         {0x807, 0x00},
 229         {0x808, 0x00},
 230         {0x809, 0x01},
 231         {0x80A, 0x61},
 232         {0x80B, 0x00},
 233         {0x80C, 0x01},
 234         {0x80D, 0x00},
 235         {0x80E, 0x00},
 236         {0x80F, 0x00},
 237         {0x810, 0x00},
 238         {0x811, 0x01},
 239         {0x812, 0x61},
 240         {0x813, 0x00},
 241         {0x814, 0x11},
 242         {0x815, 0x00},
 243         {0x816, 0x41},
 244         {0x817, 0x00},
 245         {0x818, 0x51},
 246         {0x819, 0x01},
 247         {0x81A, 0x1F},
 248         {0x81B, 0x00},
 249         {0x81C, 0x01},
 250         {0x81D, 0x00},
 251         {0x81E, 0x11},
 252         {0x81F, 0x00},
 253         {0x820, 0x41},
 254         {0x821, 0x00},
 255         {0x822, 0x51},
 256         {0x823, 0x00},
 257         {0x824, 0x00},
 258         {0x825, 0x00},
 259         {0x826, 0x47},
 260         {0x827, 0x01},
 261         {0x828, 0x4F},
 262         {0x829, 0x00},
 263         {0x82A, 0x00},
 264         {0x82B, 0x00},
 265         {0x82C, 0x30},
 266         {0x82D, 0x00},
 267         {0x82E, 0x40},
 268         {0x82F, 0x00},
 269         {0x830, 0xB3},
 270         {0x831, 0x00},
 271         {0x832, 0xE3},
 272         {0x833, 0x00},
 273         {0x834, 0x00},
 274         {0x835, 0x00},
 275         {0x836, 0x00},
 276         {0x837, 0x00},
 277         {0x838, 0x00},
 278         {0x839, 0x01},
 279         {0x83A, 0x61},
 280         {0x83B, 0x00},
 281         {0x83C, 0x01},
 282         {0x83D, 0x00},
 283         {0x83E, 0x00},
 284         {0x83F, 0x00},
 285         {0x840, 0x00},
 286         {0x841, 0x01},
 287         {0x842, 0x61},
 288         {0x843, 0x00},
 289         {0x844, 0x1D},
 290         {0x845, 0x00},
 291         {0x846, 0x00},
 292         {0x847, 0x00},
 293         {0x848, 0x00},
 294         {0x849, 0x01},
 295         {0x84A, 0x1F},
 296         {0x84B, 0x00},
 297         {0x84C, 0x05},
 298         {0x84D, 0x00},
 299         {0x84E, 0x19},
 300         {0x84F, 0x01},
 301         {0x850, 0x21},
 302         {0x851, 0x01},
 303         {0x852, 0x5D},
 304         {0x853, 0x00},
 305         {0x854, 0x00},
 306         {0x855, 0x00},
 307         {0x856, 0x19},
 308         {0x857, 0x01},
 309         {0x858, 0x21},
 310         {0x859, 0x00},
 311         {0x85A, 0x00},
 312         {0x85B, 0x00},
 313         {0x85C, 0x00},
 314         {0x85D, 0x00},
 315         {0x85E, 0x00},
 316         {0x85F, 0x00},
 317         {0x860, 0xB3},
 318         {0x861, 0x00},
 319         {0x862, 0xE3},
 320         {0x863, 0x00},
 321         {0x864, 0x00},
 322         {0x865, 0x00},
 323         {0x866, 0x00},
 324         {0x867, 0x00},
 325         {0x868, 0x00},
 326         {0x869, 0xE2},
 327         {0x86A, 0x00},
 328         {0x86B, 0x01},
 329         {0x86C, 0x06},
 330         {0x86D, 0x00},
 331         {0x86E, 0x00},
 332         {0x86F, 0x00},
 333         {0x870, 0x60},
 334         {0x871, 0x8C},
 335         {0x872, 0x10},
 336         {0x873, 0x00},
 337         {0x874, 0xE0},
 338         {0x875, 0x00},
 339         {0x876, 0x27},
 340         {0x877, 0x01},
 341         {0x878, 0x00},
 342         {0x879, 0x00},
 343         {0x87A, 0x00},
 344         {0x87B, 0x03},
 345         {0x87C, 0x00},
 346         {0x87D, 0x00},
 347         {0x87E, 0x00},
 348         {0x87F, 0x00},
 349         {0x880, 0x00},
 350         {0x881, 0x00},
 351         {0x882, 0x00},
 352         {0x883, 0x00},
 353         {0x884, 0x00},
 354         {0x885, 0x00},
 355         {0x886, 0xF8},
 356         {0x887, 0x00},
 357         {0x888, 0x03},
 358         {0x889, 0x00},
 359         {0x88A, 0x64},
 360         {0x88B, 0x00},
 361         {0x88C, 0x03},
 362         {0x88D, 0x00},
 363         {0x88E, 0xB1},
 364         {0x88F, 0x00},
 365         {0x890, 0x03},
 366         {0x891, 0x01},
 367         {0x892, 0x1D},
 368         {0x893, 0x00},
 369         {0x894, 0x03},
 370         {0x895, 0x01},
 371         {0x896, 0x4B},
 372         {0x897, 0x00},
 373         {0x898, 0xE5},
 374         {0x899, 0x00},
 375         {0x89A, 0x01},
 376         {0x89B, 0x00},
 377         {0x89C, 0x01},
 378         {0x89D, 0x04},
 379         {0x89E, 0xC8},
 380         {0x89F, 0x00},
 381         {0x8A0, 0x01},
 382         {0x8A1, 0x01},
 383         {0x8A2, 0x61},
 384         {0x8A3, 0x00},
 385         {0x8A4, 0x01},
 386         {0x8A5, 0x00},
 387         {0x8A6, 0x00},
 388         {0x8A7, 0x00},
 389         {0x8A8, 0x00},
 390         {0x8A9, 0x00},
 391         {0x8AA, 0x7F},
 392         {0x8AB, 0x03},
 393         {0x8AC, 0x00},
 394         {0x8AD, 0x00},
 395         {0x8AE, 0x00},
 396         {0x8AF, 0x00},
 397         {0x8B0, 0x00},
 398         {0x8B1, 0x00},
 399         {0x8B6, 0x00},
 400         {0x8B7, 0x01},
 401         {0x8B8, 0x00},
 402         {0x8B9, 0x00},
 403         {0x8BA, 0x02},
 404         {0x8BB, 0x00},
 405         {0x8BC, 0xFF},
 406         {0x8BD, 0x00},
 407         {0x8FE, 2},
 408 };
 409
 410 static const struct rj54n1_reg_val bank_10[] = {
 411         {0x10bf, 0x69}
 412 };
 413
 414 /* Clock dividers - these are default register values, divider = register + 1 */
 415 static const struct rj54n1_clock_div clk_div = {
 416         .ratio_tg       = 3 /* default: 5 */,
 417         .ratio_t        = 4 /* default: 1 */,
 418         .ratio_r        = 4 /* default: 0 */,
 419         .ratio_op       = 1 /* default: 5 */,
 420         .ratio_o        = 9 /* default: 0 */,
 421 };
 422
 423 static struct rj54n1 *to_rj54n1(const struct i2c_client *client)
 424 {
 425         return container_of(i2c_get_clientdata(client), struct rj54n1, subdev);
 426 }
 427
 428 static int reg_read(struct i2c_client *client, const u16 reg)
 429 {
 430         struct rj54n1 *rj54n1 = to_rj54n1(client);
 431         int ret;
 432
 433         /* set bank */
 434         if (rj54n1->bank != reg >> 8) {
 435                 dev_dbg(&client->dev, "[0x%x] = 0x%x\n", 0xff, reg >> 8);
 436                 ret = i2c_smbus_write_byte_data(client, 0xff, reg >> 8);
 437                 if (ret < 0)
 438                         return ret;
 439                 rj54n1->bank = reg >> 8;
 440         }
 441         return i2c_smbus_read_byte_data(client, reg & 0xff);
 442 }
 443
 444 static int reg_write(struct i2c_client *client, const u16 reg,
 445                      const u8 data)
 446 {
 447         struct rj54n1 *rj54n1 = to_rj54n1(client);
 448         int ret;
 449
 450         /* set bank */
 451         if (rj54n1->bank != reg >> 8) {
 452                 dev_dbg(&client->dev, "[0x%x] = 0x%x\n", 0xff, reg >> 8);
 453                 ret = i2c_smbus_write_byte_data(client, 0xff, reg >> 8);
 454                 if (ret < 0)
 455                         return ret;
 456                 rj54n1->bank = reg >> 8;
 457         }
 458         dev_dbg(&client->dev, "[0x%x] = 0x%x\n", reg & 0xff, data);
 459         return i2c_smbus_write_byte_data(client, reg & 0xff, data);
 460 }
 461
 462 static int reg_set(struct i2c_client *client, const u16 reg,
 463                    const u8 data, const u8 mask)
 464 {
 465         int ret;
 466
 467         ret = reg_read(client, reg);
 468         if (ret < 0)
 469                 return ret;
 470         return reg_write(client, reg, (ret & ~mask) | (data & mask));
 471 }
 472
 473 static int reg_write_multiple(struct i2c_client *client,
 474                               const struct rj54n1_reg_val *rv, const int n)
 475 {
 476         int i, ret;
 477
 478         for (i = 0; i < n; i++) {
 479                 ret = reg_write(client, rv->reg, rv->val);
 480                 if (ret < 0)
 481                         return ret;
 482                 rv++;
 483         }
 484
 485         return 0;
 486 }
 487
 488 static int rj54n1_enum_fmt(struct v4l2_subdev *sd, unsigned int index,
 489                            u32 *code)
 490 {
 491         if (index >= ARRAY_SIZE(rj54n1_colour_fmts))
 492                 return -EINVAL;
 493
 494         *code = rj54n1_colour_fmts[index].code;
 495         return 0;
 496 }
 497
 498 static int rj54n1_s_stream(struct v4l2_subdev *sd, int enable)
 499 {
 500         struct i2c_client *client = v4l2_get_subdevdata(sd);
 501
 502         /* Switch between preview and still shot modes */
 503         return reg_set(client, RJ54N1_STILL_CONTROL, (!enable) << 7, 0x80);
 504 }
 505
 506 static int rj54n1_set_rect(struct i2c_client *client,
 507                            u16 reg_x, u16 reg_y, u16 reg_xy,
 508                            u32 width, u32 height)
 509 {
 510         int ret;
 511
 512         ret = reg_write(client, reg_xy,
 513                         ((width >> 4) & 0x70) |
 514                         ((height >> 8) & 7));
 515
 516         if (!ret)
 517                 ret = reg_write(client, reg_x, width & 0xff);
 518         if (!ret)
 519                 ret = reg_write(client, reg_y, height & 0xff);
 520
 521         return ret;
 522 }
 523
 524 /*
 525  * Some commands, specifically certain initialisation sequences, require
 526  * a commit operation.
 527  */
 528 static int rj54n1_commit(struct i2c_client *client)
 529 {
 530         int ret = reg_write(client, RJ54N1_INIT_START, 1);
 531         msleep(10);
 532         if (!ret)
 533                 ret = reg_write(client, RJ54N1_INIT_START, 0);
 534         return ret;
 535 }
 536
 537 static int rj54n1_sensor_scale(struct v4l2_subdev *sd, s32 *in_w, s32 *in_h,
 538                                s32 *out_w, s32 *out_h);
 539
 540 static int rj54n1_s_crop(struct v4l2_subdev *sd, const struct v4l2_crop *a)
 541 {
 542         struct i2c_client *client = v4l2_get_subdevdata(sd);
 543         struct rj54n1 *rj54n1 = to_rj54n1(client);
 544         const struct v4l2_rect *rect = &a->c;
 545         int dummy = 0, output_w, output_h,
 546                 input_w = rect->width, input_h = rect->height;
 547         int ret;
 548
 549         /* arbitrary minimum width and height, edges unimportant */
 550         soc_camera_limit_side(&dummy, &input_w,
 551                      RJ54N1_COLUMN_SKIP, 8, RJ54N1_MAX_WIDTH);
 552
 553         soc_camera_limit_side(&dummy, &input_h,
 554                      RJ54N1_ROW_SKIP, 8, RJ54N1_MAX_HEIGHT);
 555
 556         output_w = (input_w * 1024 + rj54n1->resize / 2) / rj54n1->resize;
 557         output_h = (input_h * 1024 + rj54n1->resize / 2) / rj54n1->resize;
 558
 559         dev_dbg(&client->dev, "Scaling for %dx%d : %u = %dx%d\n",
 560                 input_w, input_h, rj54n1->resize, output_w, output_h);
 561
 562         ret = rj54n1_sensor_scale(sd, &input_w, &input_h, &output_w, &output_h);
 563         if (ret < 0)
 564                 return ret;
 565
 566         rj54n1->width           = output_w;
 567         rj54n1->height          = output_h;
 568         rj54n1->resize          = ret;
 569         rj54n1->rect.width      = input_w;
 570         rj54n1->rect.height     = input_h;
 571
 572         return 0;
 573 }
 574
 575 static int rj54n1_g_crop(struct v4l2_subdev *sd, struct v4l2_crop *a)
 576 {
 577         struct i2c_client *client = v4l2_get_subdevdata(sd);
 578         struct rj54n1 *rj54n1 = to_rj54n1(client);
 579
 580         a->c    = rj54n1->rect;
 581         a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 582
 583         return 0;
 584 }
 585
 586 static int rj54n1_cropcap(struct v4l2_subdev *sd, struct v4l2_cropcap *a)
 587 {
 588         a->bounds.left                  = RJ54N1_COLUMN_SKIP;
 589         a->bounds.top                   = RJ54N1_ROW_SKIP;
 590         a->bounds.width                 = RJ54N1_MAX_WIDTH;
 591         a->bounds.height                = RJ54N1_MAX_HEIGHT;
 592         a->defrect                      = a->bounds;
 593         a->type                         = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 594         a->pixelaspect.numerator        = 1;
 595         a->pixelaspect.denominator      = 1;
 596
 597         return 0;
 598 }
 599
 600 static int rj54n1_g_fmt(struct v4l2_subdev *sd,
 601                         struct v4l2_mbus_framefmt *mf)
 602 {
 603         struct i2c_client *client = v4l2_get_subdevdata(sd);
 604         struct rj54n1 *rj54n1 = to_rj54n1(client);
 605
 606         mf->code        = rj54n1->fmt->code;
 607         mf->colorspace  = rj54n1->fmt->colorspace;
 608         mf->field       = V4L2_FIELD_NONE;
 609         mf->width       = rj54n1->width;
 610         mf->height      = rj54n1->height;
 611
 612         return 0;
 613 }
 614
 615 /*
 616  * The actual geometry configuration routine. It scales the input window into
 617  * the output one, updates the window sizes and returns an error or the resize
 618  * coefficient on success. Note: we only use the "Fixed Scaling" on this camera.
 619  */
 620 static int rj54n1_sensor_scale(struct v4l2_subdev *sd, s32 *in_w, s32 *in_h,
 621                                s32 *out_w, s32 *out_h)
 622 {
 623         struct i2c_client *client = v4l2_get_subdevdata(sd);
 624         struct rj54n1 *rj54n1 = to_rj54n1(client);
 625         unsigned int skip, resize, input_w = *in_w, input_h = *in_h,
 626                 output_w = *out_w, output_h = *out_h;
 627         u16 inc_sel, wb_bit8, wb_left, wb_right, wb_top, wb_bottom;
 628         unsigned int peak, peak_50, peak_60;
 629         int ret;
 630
 631         /*
 632          * We have a problem with crops, where the window is larger than 512x384
 633          * and output window is larger than a half of the input one. In this
 634          * case we have to either reduce the input window to equal or below
 635          * 512x384 or the output window to equal or below 1/2 of the input.
 636          */
 637         if (output_w > max(512U, input_w / 2)) {
 638                 if (2 * output_w > RJ54N1_MAX_WIDTH) {
 639                         input_w = RJ54N1_MAX_WIDTH;
 640                         output_w = RJ54N1_MAX_WIDTH / 2;
 641                 } else {
 642                         input_w = output_w * 2;
 643                 }
 644
 645                 dev_dbg(&client->dev, "Adjusted output width: in %u, out %u\n",
 646                         input_w, output_w);
 647         }
 648
 649         if (output_h > max(384U, input_h / 2)) {
 650                 if (2 * output_h > RJ54N1_MAX_HEIGHT) {
 651                         input_h = RJ54N1_MAX_HEIGHT;
 652                         output_h = RJ54N1_MAX_HEIGHT / 2;
 653                 } else {
 654                         input_h = output_h * 2;
 655                 }
 656
 657                 dev_dbg(&client->dev, "Adjusted output height: in %u, out %u\n",
 658                         input_h, output_h);
 659         }
 660
 661         /* Idea: use the read mode for snapshots, handle separate geometries */
 662         ret = rj54n1_set_rect(client, RJ54N1_X_OUTPUT_SIZE_S_L,
 663                               RJ54N1_Y_OUTPUT_SIZE_S_L,
 664                               RJ54N1_XY_OUTPUT_SIZE_S_H, output_w, output_h);
 665         if (!ret)
 666                 ret = rj54n1_set_rect(client, RJ54N1_X_OUTPUT_SIZE_P_L,
 667                               RJ54N1_Y_OUTPUT_SIZE_P_L,
 668                               RJ54N1_XY_OUTPUT_SIZE_P_H, output_w, output_h);
 669
 670         if (ret < 0)
 671                 return ret;
 672
 673         if (output_w > input_w && output_h > input_h) {
 674                 input_w = output_w;
 675                 input_h = output_h;
 676
 677                 resize = 1024;
 678         } else {
 679                 unsigned int resize_x, resize_y;
 680                 resize_x = (input_w * 1024 + output_w / 2) / output_w;
 681                 resize_y = (input_h * 1024 + output_h / 2) / output_h;
 682
 683                 /* We want max(resize_x, resize_y), check if it still fits */
 684                 if (resize_x > resize_y &&
 685                     (output_h * resize_x + 512) / 1024 > RJ54N1_MAX_HEIGHT)
 686                         resize = (RJ54N1_MAX_HEIGHT * 1024 + output_h / 2) /
 687                                 output_h;
 688                 else if (resize_y > resize_x &&
 689                          (output_w * resize_y + 512) / 1024 > RJ54N1_MAX_WIDTH)
 690                         resize = (RJ54N1_MAX_WIDTH * 1024 + output_w / 2) /
 691                                 output_w;
 692                 else
 693                         resize = max(resize_x, resize_y);
 694
 695                 /* Prohibited value ranges */
 696                 switch (resize) {
 697                 case 2040 ... 2047:
 698                         resize = 2039;
 699                         break;
 700                 case 4080 ... 4095:
 701                         resize = 4079;
 702                         break;
 703                 case 8160 ... 8191:
 704                         resize = 8159;
 705                         break;
 706                 case 16320 ... 16384:
 707                         resize = 16319;
 708                 }
 709         }
 710
 711         /* Set scaling */
 712         ret = reg_write(client, RJ54N1_RESIZE_HOLD_L, resize & 0xff);
 713         if (!ret)
 714                 ret = reg_write(client, RJ54N1_RESIZE_HOLD_H, resize >> 8);
 715
 716         if (ret < 0)
 717                 return ret;
 718
 719         /*
 720          * Configure a skipping bitmask. The sensor will select a skipping value
 721          * among set bits automatically. This is very unclear in the datasheet
 722          * too. I was told, in this register one enables all skipping values,
 723          * that are required for a specific resize, and the camera selects
 724          * automatically, which ones to use. But it is unclear how to identify,
 725          * which cropping values are needed. Secondly, why don't we just set all
 726          * bits and let the camera choose? Would it increase processing time and
 727          * reduce the framerate? Using 0xfffc for INC_USE_SEL doesn't seem to
 728          * improve the image quality or stability for larger frames (see comment
 729          * above), but I didn't check the framerate.
 730          */
 731         skip = min(resize / 1024, 15U);
 732
 733         inc_sel = 1 << skip;
 734
 735         if (inc_sel <= 2)
 736                 inc_sel = 0xc;
 737         else if (resize & 1023 && skip < 15)
 738                 inc_sel |= 1 << (skip + 1);
 739
 740         ret = reg_write(client, RJ54N1_INC_USE_SEL_L, inc_sel & 0xfc);
 741         if (!ret)
 742                 ret = reg_write(client, RJ54N1_INC_USE_SEL_H, inc_sel >> 8);
 743
 744         if (!rj54n1->auto_wb) {
 745                 /* Auto white balance window */
 746                 wb_left   = output_w / 16;
 747                 wb_right  = (3 * output_w / 4 - 3) / 4;
 748                 wb_top    = output_h / 16;
 749                 wb_bottom = (3 * output_h / 4 - 3) / 4;
 750                 wb_bit8   = ((wb_left >> 2) & 0x40) | ((wb_top >> 4) & 0x10) |
 751                         ((wb_right >> 6) & 4) | ((wb_bottom >> 8) & 1);
 752
 753                 if (!ret)
 754                         ret = reg_write(client, RJ54N1_BIT8_WB, wb_bit8);
 755                 if (!ret)
 756                         ret = reg_write(client, RJ54N1_HCAPS_WB, wb_left);
 757                 if (!ret)
 758                         ret = reg_write(client, RJ54N1_VCAPS_WB, wb_top);
 759                 if (!ret)
 760                         ret = reg_write(client, RJ54N1_HCAPE_WB, wb_right);
 761                 if (!ret)
 762                         ret = reg_write(client, RJ54N1_VCAPE_WB, wb_bottom);
 763         }
 764
 765         /* Antiflicker */
 766         peak = 12 * RJ54N1_MAX_WIDTH * (1 << 14) * resize / rj54n1->tgclk_mhz /
 767                 10000;
 768         peak_50 = peak / 6;
 769         peak_60 = peak / 5;
 770
 771         if (!ret)
 772                 ret = reg_write(client, RJ54N1_PEAK_H,
 773                                 ((peak_50 >> 4) & 0xf0) | (peak_60 >> 8));
 774         if (!ret)
 775                 ret = reg_write(client, RJ54N1_PEAK_50, peak_50);
 776         if (!ret)
 777                 ret = reg_write(client, RJ54N1_PEAK_60, peak_60);
 778         if (!ret)
 779                 ret = reg_write(client, RJ54N1_PEAK_DIFF, peak / 150);
 780
 781         /* Start resizing */
 782         if (!ret)
 783                 ret = reg_write(client, RJ54N1_RESIZE_CONTROL,
 784                                 RESIZE_HOLD_SEL | RESIZE_GO | 1);
 785
 786         if (ret < 0)
 787                 return ret;
 788
 789         /* Constant taken from manufacturer's example */
 790         msleep(230);
 791
 792         ret = reg_write(client, RJ54N1_RESIZE_CONTROL, RESIZE_HOLD_SEL | 1);
 793         if (ret < 0)
 794                 return ret;
 795
 796         *in_w = (output_w * resize + 512) / 1024;
 797         *in_h = (output_h * resize + 512) / 1024;
 798         *out_w = output_w;
 799         *out_h = output_h;
 800
 801         dev_dbg(&client->dev, "Scaled for %dx%d : %u = %ux%u, skip %u\n",
 802                 *in_w, *in_h, resize, output_w, output_h, skip);
 803
 804         return resize;
 805 }
 806
 807 static int rj54n1_set_clock(struct i2c_client *client)
 808 {
 809         struct rj54n1 *rj54n1 = to_rj54n1(client);
 810         int ret;
 811
 812         /* Enable external clock */
 813         ret = reg_write(client, RJ54N1_RESET_STANDBY, E_EXCLK | SOFT_STDBY);
 814         /* Leave stand-by. Note: use this when implementing suspend / resume */
 815         if (!ret)
 816                 ret = reg_write(client, RJ54N1_RESET_STANDBY, E_EXCLK);
 817
 818         if (!ret)
 819                 ret = reg_write(client, RJ54N1_PLL_L, PLL_L);
 820         if (!ret)
 821                 ret = reg_write(client, RJ54N1_PLL_N, PLL_N);
 822
 823         /* TGCLK dividers */
 824         if (!ret)
 825                 ret = reg_write(client, RJ54N1_RATIO_TG,
 826                                 rj54n1->clk_div.ratio_tg);
 827         if (!ret)
 828                 ret = reg_write(client, RJ54N1_RATIO_T,
 829                                 rj54n1->clk_div.ratio_t);
 830         if (!ret)
 831                 ret = reg_write(client, RJ54N1_RATIO_R,
 832                                 rj54n1->clk_div.ratio_r);
 833
 834         /* Enable TGCLK & RAMP */
 835         if (!ret)
 836                 ret = reg_write(client, RJ54N1_RAMP_TGCLK_EN, 3);
 837
 838         /* Disable clock output */
 839         if (!ret)
 840                 ret = reg_write(client, RJ54N1_OCLK_DSP, 0);
 841
 842         /* Set divisors */
 843         if (!ret)
 844                 ret = reg_write(client, RJ54N1_RATIO_OP,
 845                                 rj54n1->clk_div.ratio_op);
 846         if (!ret)
 847                 ret = reg_write(client, RJ54N1_RATIO_O,
 848                                 rj54n1->clk_div.ratio_o);
 849
 850         /* Enable OCLK */
 851         if (!ret)
 852                 ret = reg_write(client, RJ54N1_OCLK_SEL_EN, 1);
 853
 854         /* Use PLL for Timing Generator, write 2 to reserved bits */
 855         if (!ret)
 856                 ret = reg_write(client, RJ54N1_TG_BYPASS, 2);
 857
 858         /* Take sensor out of reset */
 859         if (!ret)
 860                 ret = reg_write(client, RJ54N1_RESET_STANDBY,
 861                                 E_EXCLK | SEN_RSTX);
 862         /* Enable PLL */
 863         if (!ret)
 864                 ret = reg_write(client, RJ54N1_PLL_EN, 1);
 865
 866         /* Wait for PLL to stabilise */
 867         msleep(10);
 868
 869         /* Enable clock to frequency divider */
 870         if (!ret)
 871                 ret = reg_write(client, RJ54N1_CLK_RST, 1);
 872
 873         if (!ret)
 874                 ret = reg_read(client, RJ54N1_CLK_RST);
 875         if (ret != 1) {
 876                 dev_err(&client->dev,
 877                         "Resetting RJ54N1CB0C clock failed: %d!\n", ret);
 878                 return -EIO;
 879         }
 880
 881         /* Start the PLL */
 882         ret = reg_set(client, RJ54N1_OCLK_DSP, 1, 1);
 883
 884         /* Enable OCLK */
 885         if (!ret)
 886                 ret = reg_write(client, RJ54N1_OCLK_SEL_EN, 1);
 887
 888         return ret;
 889 }
 890
 891 static int rj54n1_reg_init(struct i2c_client *client)
 892 {
 893         struct rj54n1 *rj54n1 = to_rj54n1(client);
 894         int ret = rj54n1_set_clock(client);
 895
 896         if (!ret)
 897                 ret = reg_write_multiple(client, bank_7, ARRAY_SIZE(bank_7));
 898         if (!ret)
 899                 ret = reg_write_multiple(client, bank_10, ARRAY_SIZE(bank_10));
 900
 901         /* Set binning divisors */
 902         if (!ret)
 903                 ret = reg_write(client, RJ54N1_SCALE_1_2_LEV, 3 | (7 << 4));
 904         if (!ret)
 905                 ret = reg_write(client, RJ54N1_SCALE_4_LEV, 0xf);
 906
 907         /* Switch to fixed resize mode */
 908         if (!ret)
 909                 ret = reg_write(client, RJ54N1_RESIZE_CONTROL,
 910                                 RESIZE_HOLD_SEL | 1);
 911
 912         /* Set gain */
 913         if (!ret)
 914                 ret = reg_write(client, RJ54N1_Y_GAIN, 0x84);
 915
 916         /*
 917          * Mirror the image back: default is upside down and left-to-right...
 918          * Set manual preview / still shot switching
 919          */
 920         if (!ret)
 921                 ret = reg_write(client, RJ54N1_MIRROR_STILL_MODE, 0x27);
 922
 923         if (!ret)
 924                 ret = reg_write_multiple(client, bank_4, ARRAY_SIZE(bank_4));
 925
 926         /* Auto exposure area */
 927         if (!ret)
 928                 ret = reg_write(client, RJ54N1_EXPOSURE_CONTROL, 0x80);
 929         /* Check current auto WB config */
 930         if (!ret)
 931                 ret = reg_read(client, RJ54N1_WB_SEL_WEIGHT_I);
 932         if (ret >= 0) {
 933                 rj54n1->auto_wb = ret & 0x80;
 934                 ret = reg_write_multiple(client, bank_5, ARRAY_SIZE(bank_5));
 935         }
 936         if (!ret)
 937                 ret = reg_write_multiple(client, bank_8, ARRAY_SIZE(bank_8));
 938
 939         if (!ret)
 940                 ret = reg_write(client, RJ54N1_RESET_STANDBY,
 941                                 E_EXCLK | DSP_RSTX | SEN_RSTX);
 942
 943         /* Commit init */
 944         if (!ret)
 945                 ret = rj54n1_commit(client);
 946
 947         /* Take DSP, TG, sensor out of reset */
 948         if (!ret)
 949                 ret = reg_write(client, RJ54N1_RESET_STANDBY,
 950                                 E_EXCLK | DSP_RSTX | TG_RSTX | SEN_RSTX);
 951
 952         /* Start register update? Same register as 0x?FE in many bank_* sets */
 953         if (!ret)
 954                 ret = reg_write(client, RJ54N1_FWFLG, 2);
 955
 956         /* Constant taken from manufacturer's example */
 957         msleep(700);
 958
 959         return ret;
 960 }
 961
 962 static int rj54n1_try_fmt(struct v4l2_subdev *sd,
 963                           struct v4l2_mbus_framefmt *mf)
 964 {
 965         struct i2c_client *client = v4l2_get_subdevdata(sd);
 966         struct rj54n1 *rj54n1 = to_rj54n1(client);
 967         const struct rj54n1_datafmt *fmt;
 968         int align = mf->code == MEDIA_BUS_FMT_SBGGR10_1X10 ||
 969                 mf->code == MEDIA_BUS_FMT_SBGGR10_2X8_PADHI_BE ||
 970                 mf->code == MEDIA_BUS_FMT_SBGGR10_2X8_PADLO_BE ||
 971                 mf->code == MEDIA_BUS_FMT_SBGGR10_2X8_PADHI_LE ||
 972                 mf->code == MEDIA_BUS_FMT_SBGGR10_2X8_PADLO_LE;
 973
 974         dev_dbg(&client->dev, "%s: code = %d, width = %u, height = %u\n",
 975                 __func__, mf->code, mf->width, mf->height);
 976
 977         fmt = rj54n1_find_datafmt(mf->code, rj54n1_colour_fmts,
 978                                   ARRAY_SIZE(rj54n1_colour_fmts));
 979         if (!fmt) {
 980                 fmt = rj54n1->fmt;
 981                 mf->code = fmt->code;
 982         }
 983
 984         mf->field       = V4L2_FIELD_NONE;
 985         mf->colorspace  = fmt->colorspace;
 986
 987         v4l_bound_align_image(&mf->width, 112, RJ54N1_MAX_WIDTH, align,
 988                               &mf->height, 84, RJ54N1_MAX_HEIGHT, align, 0);
 989
 990         return 0;
 991 }
 992
 993 static int rj54n1_s_fmt(struct v4l2_subdev *sd,
 994                         struct v4l2_mbus_framefmt *mf)
 995 {
 996         struct i2c_client *client = v4l2_get_subdevdata(sd);
 997         struct rj54n1 *rj54n1 = to_rj54n1(client);
 998         const struct rj54n1_datafmt *fmt;
 999         int output_w, output_h, max_w, max_h,
1000                 input_w = rj54n1->rect.width, input_h = rj54n1->rect.height;
1001         int ret;
1002
1003         /*
1004          * The host driver can call us without .try_fmt(), so, we have to take
1005          * care ourseleves
1006          */
1007         rj54n1_try_fmt(sd, mf);
1008
1009         /*
1010          * Verify if the sensor has just been powered on. TODO: replace this
1011          * with proper PM, when a suitable API is available.
1012          */
1013         ret = reg_read(client, RJ54N1_RESET_STANDBY);
1014         if (ret < 0)
1015                 return ret;
1016
1017         if (!(ret & E_EXCLK)) {
1018                 ret = rj54n1_reg_init(client);
1019                 if (ret < 0)
1020                         return ret;
1021         }
1022
1023         dev_dbg(&client->dev, "%s: code = %d, width = %u, height = %u\n",
1024                 __func__, mf->code, mf->width, mf->height);
1025
1026         /* RA_SEL_UL is only relevant for raw modes, ignored otherwise. */
1027         switch (mf->code) {
1028         case MEDIA_BUS_FMT_YUYV8_2X8:
1029                 ret = reg_write(client, RJ54N1_OUT_SEL, 0);
1030                 if (!ret)
1031                         ret = reg_set(client, RJ54N1_BYTE_SWAP, 8, 8);
1032                 break;
1033         case MEDIA_BUS_FMT_YVYU8_2X8:
1034                 ret = reg_write(client, RJ54N1_OUT_SEL, 0);
1035                 if (!ret)
1036                         ret = reg_set(client, RJ54N1_BYTE_SWAP, 0, 8);
1037                 break;
1038         case MEDIA_BUS_FMT_RGB565_2X8_LE:
1039                 ret = reg_write(client, RJ54N1_OUT_SEL, 0x11);
1040                 if (!ret)
1041                         ret = reg_set(client, RJ54N1_BYTE_SWAP, 8, 8);
1042                 break;
1043         case MEDIA_BUS_FMT_RGB565_2X8_BE:
1044                 ret = reg_write(client, RJ54N1_OUT_SEL, 0x11);
1045                 if (!ret)
1046                         ret = reg_set(client, RJ54N1_BYTE_SWAP, 0, 8);
1047                 break;
1048         case MEDIA_BUS_FMT_SBGGR10_2X8_PADLO_LE:
1049                 ret = reg_write(client, RJ54N1_OUT_SEL, 4);
1050                 if (!ret)
1051                         ret = reg_set(client, RJ54N1_BYTE_SWAP, 8, 8);
1052                 if (!ret)
1053                         ret = reg_write(client, RJ54N1_RA_SEL_UL, 0);
1054                 break;
1055         case MEDIA_BUS_FMT_SBGGR10_2X8_PADHI_LE:
1056                 ret = reg_write(client, RJ54N1_OUT_SEL, 4);
1057                 if (!ret)
1058                         ret = reg_set(client, RJ54N1_BYTE_SWAP, 8, 8);
1059                 if (!ret)
1060                         ret = reg_write(client, RJ54N1_RA_SEL_UL, 8);
1061                 break;
1062         case MEDIA_BUS_FMT_SBGGR10_2X8_PADLO_BE:
1063                 ret = reg_write(client, RJ54N1_OUT_SEL, 4);
1064                 if (!ret)
1065                         ret = reg_set(client, RJ54N1_BYTE_SWAP, 0, 8);
1066                 if (!ret)
1067                         ret = reg_write(client, RJ54N1_RA_SEL_UL, 0);
1068                 break;
1069         case MEDIA_BUS_FMT_SBGGR10_2X8_PADHI_BE:
1070                 ret = reg_write(client, RJ54N1_OUT_SEL, 4);
1071                 if (!ret)
1072                         ret = reg_set(client, RJ54N1_BYTE_SWAP, 0, 8);
1073                 if (!ret)
1074                         ret = reg_write(client, RJ54N1_RA_SEL_UL, 8);
1075                 break;
1076         case MEDIA_BUS_FMT_SBGGR10_1X10:
1077                 ret = reg_write(client, RJ54N1_OUT_SEL, 5);
1078                 break;
1079         default:
1080                 ret = -EINVAL;
1081         }
1082
1083         /* Special case: a raw mode with 10 bits of data per clock tick */
1084         if (!ret)
1085                 ret = reg_set(client, RJ54N1_OCLK_SEL_EN,
1086                               (mf->code == MEDIA_BUS_FMT_SBGGR10_1X10) << 1, 2);
1087
1088         if (ret < 0)
1089                 return ret;
1090
1091         /* Supported scales 1:1 >= scale > 1:16 */
1092         max_w = mf->width * (16 * 1024 - 1) / 1024;
1093         if (input_w > max_w)
1094                 input_w = max_w;
1095         max_h = mf->height * (16 * 1024 - 1) / 1024;
1096         if (input_h > max_h)
1097                 input_h = max_h;
1098
1099         output_w = mf->width;
1100         output_h = mf->height;
1101
1102         ret = rj54n1_sensor_scale(sd, &input_w, &input_h, &output_w, &output_h);
1103         if (ret < 0)
1104                 return ret;
1105
1106         fmt = rj54n1_find_datafmt(mf->code, rj54n1_colour_fmts,
1107                                   ARRAY_SIZE(rj54n1_colour_fmts));
1108
1109         rj54n1->fmt             = fmt;
1110         rj54n1->resize          = ret;
1111         rj54n1->rect.width      = input_w;
1112         rj54n1->rect.height     = input_h;
1113         rj54n1->width           = output_w;
1114         rj54n1->height          = output_h;
1115
1116         mf->width               = output_w;
1117         mf->height              = output_h;
1118         mf->field               = V4L2_FIELD_NONE;
1119         mf->colorspace          = fmt->colorspace;
1120
1121         return 0;
1122 }
1123
1124 #ifdef CONFIG_VIDEO_ADV_DEBUG
1125 static int rj54n1_g_register(struct v4l2_subdev *sd,
1126                              struct v4l2_dbg_register *reg)
1127 {
1128         struct i2c_client *client = v4l2_get_subdevdata(sd);
1129
1130         if (reg->reg < 0x400 || reg->reg > 0x1fff)
1131                 /* Registers > 0x0800 are only available from Sharp support */
1132                 return -EINVAL;
1133
1134         reg->size = 1;
1135         reg->val = reg_read(client, reg->reg);
1136
1137         if (reg->val > 0xff)
1138                 return -EIO;
1139
1140         return 0;
1141 }
1142
1143 static int rj54n1_s_register(struct v4l2_subdev *sd,
1144                              const struct v4l2_dbg_register *reg)
1145 {
1146         struct i2c_client *client = v4l2_get_subdevdata(sd);
1147
1148         if (reg->reg < 0x400 || reg->reg > 0x1fff)
1149                 /* Registers >= 0x0800 are only available from Sharp support */
1150                 return -EINVAL;
1151
1152         if (reg_write(client, reg->reg, reg->val) < 0)
1153                 return -EIO;
1154
1155         return 0;
1156 }
1157 #endif
1158
1159 static int rj54n1_s_power(struct v4l2_subdev *sd, int on)
1160 {
1161         struct i2c_client *client = v4l2_get_subdevdata(sd);
1162         struct soc_camera_subdev_desc *ssdd = soc_camera_i2c_to_desc(client);
1163         struct rj54n1 *rj54n1 = to_rj54n1(client);
1164
1165         return soc_camera_set_power(&client->dev, ssdd, rj54n1->clk, on);
1166 }
1167
1168 static int rj54n1_s_ctrl(struct v4l2_ctrl *ctrl)
1169 {
1170         struct rj54n1 *rj54n1 = container_of(ctrl->handler, struct rj54n1, hdl);
1171         struct v4l2_subdev *sd = &rj54n1->subdev;
1172         struct i2c_client *client = v4l2_get_subdevdata(sd);
1173         int data;
1174
1175         switch (ctrl->id) {
1176         case V4L2_CID_VFLIP:
1177                 if (ctrl->val)
1178                         data = reg_set(client, RJ54N1_MIRROR_STILL_MODE, 0, 1);
1179                 else
1180                         data = reg_set(client, RJ54N1_MIRROR_STILL_MODE, 1, 1);
1181                 if (data < 0)
1182                         return -EIO;
1183                 return 0;
1184         case V4L2_CID_HFLIP:
1185                 if (ctrl->val)
1186                         data = reg_set(client, RJ54N1_MIRROR_STILL_MODE, 0, 2);
1187                 else
1188                         data = reg_set(client, RJ54N1_MIRROR_STILL_MODE, 2, 2);
1189                 if (data < 0)
1190                         return -EIO;
1191                 return 0;
1192         case V4L2_CID_GAIN:
1193                 if (reg_write(client, RJ54N1_Y_GAIN, ctrl->val * 2) < 0)
1194                         return -EIO;
1195                 return 0;
1196         case V4L2_CID_AUTO_WHITE_BALANCE:
1197                 /* Auto WB area - whole image */
1198                 if (reg_set(client, RJ54N1_WB_SEL_WEIGHT_I, ctrl->val << 7,
1199                             0x80) < 0)
1200                         return -EIO;
1201                 rj54n1->auto_wb = ctrl->val;
1202                 return 0;
1203         }
1204
1205         return -EINVAL;
1206 }
1207
1208 static const struct v4l2_ctrl_ops rj54n1_ctrl_ops = {
1209         .s_ctrl = rj54n1_s_ctrl,
1210 };
1211
1212 static struct v4l2_subdev_core_ops rj54n1_subdev_core_ops = {
1213 #ifdef CONFIG_VIDEO_ADV_DEBUG
1214         .g_register     = rj54n1_g_register,
1215         .s_register     = rj54n1_s_register,
1216 #endif
1217         .s_power        = rj54n1_s_power,
1218 };
1219
1220 static int rj54n1_g_mbus_config(struct v4l2_subdev *sd,
1221                                 struct v4l2_mbus_config *cfg)
1222 {
1223         struct i2c_client *client = v4l2_get_subdevdata(sd);
1224         struct soc_camera_subdev_desc *ssdd = soc_camera_i2c_to_desc(client);
1225
1226         cfg->flags =
1227                 V4L2_MBUS_PCLK_SAMPLE_RISING | V4L2_MBUS_PCLK_SAMPLE_FALLING |
1228                 V4L2_MBUS_MASTER | V4L2_MBUS_DATA_ACTIVE_HIGH |
1229                 V4L2_MBUS_HSYNC_ACTIVE_HIGH | V4L2_MBUS_VSYNC_ACTIVE_HIGH;
1230         cfg->type = V4L2_MBUS_PARALLEL;
1231         cfg->flags = soc_camera_apply_board_flags(ssdd, cfg);
1232
1233         return 0;
1234 }
1235
1236 static int rj54n1_s_mbus_config(struct v4l2_subdev *sd,
1237                                 const struct v4l2_mbus_config *cfg)
1238 {
1239         struct i2c_client *client = v4l2_get_subdevdata(sd);
1240         struct soc_camera_subdev_desc *ssdd = soc_camera_i2c_to_desc(client);
1241
1242         /* Figures 2.5-1 to 2.5-3 - default falling pixclk edge */
1243         if (soc_camera_apply_board_flags(ssdd, cfg) &
1244             V4L2_MBUS_PCLK_SAMPLE_RISING)
1245                 return reg_write(client, RJ54N1_OUT_SIGPO, 1 << 4);
1246         else
1247                 return reg_write(client, RJ54N1_OUT_SIGPO, 0);
1248 }
1249
1250 static struct v4l2_subdev_video_ops rj54n1_subdev_video_ops = {
1251         .s_stream       = rj54n1_s_stream,
1252         .s_mbus_fmt     = rj54n1_s_fmt,
1253         .g_mbus_fmt     = rj54n1_g_fmt,
1254         .try_mbus_fmt   = rj54n1_try_fmt,
1255         .enum_mbus_fmt  = rj54n1_enum_fmt,
1256         .g_crop         = rj54n1_g_crop,
1257         .s_crop         = rj54n1_s_crop,
1258         .cropcap        = rj54n1_cropcap,
1259         .g_mbus_config  = rj54n1_g_mbus_config,
1260         .s_mbus_config  = rj54n1_s_mbus_config,
1261 };
1262
1263 static struct v4l2_subdev_ops rj54n1_subdev_ops = {
1264         .core   = &rj54n1_subdev_core_ops,
1265         .video  = &rj54n1_subdev_video_ops,
1266 };
1267
1268 /*
1269  * Interface active, can use i2c. If it fails, it can indeed mean, that
1270  * this wasn't our capture interface, so, we wait for the right one
1271  */
1272 static int rj54n1_video_probe(struct i2c_client *client,
1273                               struct rj54n1_pdata *priv)
1274 {
1275         struct rj54n1 *rj54n1 = to_rj54n1(client);
1276         int data1, data2;
1277         int ret;
1278
1279         ret = rj54n1_s_power(&rj54n1->subdev, 1);
1280         if (ret < 0)
1281                 return ret;
1282
1283         /* Read out the chip version register */
1284         data1 = reg_read(client, RJ54N1_DEV_CODE);
1285         data2 = reg_read(client, RJ54N1_DEV_CODE2);
1286
1287         if (data1 != 0x51 || data2 != 0x10) {
1288                 ret = -ENODEV;
1289                 dev_info(&client->dev, "No RJ54N1CB0C found, read 0x%x:0x%x\n",
1290                          data1, data2);
1291                 goto done;
1292         }
1293
1294         /* Configure IOCTL polarity from the platform data: 0 or 1 << 7. */
1295         ret = reg_write(client, RJ54N1_IOC, priv->ioctl_high << 7);
1296         if (ret < 0)
1297                 goto done;
1298
1299         dev_info(&client->dev, "Detected a RJ54N1CB0C chip ID 0x%x:0x%x\n",
1300                  data1, data2);
1301
1302         ret = v4l2_ctrl_handler_setup(&rj54n1->hdl);
1303
1304 done:
1305         rj54n1_s_power(&rj54n1->subdev, 0);
1306         return ret;
1307 }
1308
1309 static int rj54n1_probe(struct i2c_client *client,
1310                         const struct i2c_device_id *did)
1311 {
1312         struct rj54n1 *rj54n1;
1313         struct soc_camera_subdev_desc *ssdd = soc_camera_i2c_to_desc(client);
1314         struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent);
1315         struct rj54n1_pdata *rj54n1_priv;
1316         int ret;
1317
1318         if (!ssdd || !ssdd->drv_priv) {
1319                 dev_err(&client->dev, "RJ54N1CB0C: missing platform data!\n");
1320                 return -EINVAL;
1321         }
1322
1323         rj54n1_priv = ssdd->drv_priv;
1324
1325         if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) {
1326                 dev_warn(&adapter->dev,
1327                          "I2C-Adapter doesn't support I2C_FUNC_SMBUS_BYTE\n");
1328                 return -EIO;
1329         }
1330
1331         rj54n1 = devm_kzalloc(&client->dev, sizeof(struct rj54n1), GFP_KERNEL);
1332         if (!rj54n1)
1333                 return -ENOMEM;
1334
1335         v4l2_i2c_subdev_init(&rj54n1->subdev, client, &rj54n1_subdev_ops);
1336         v4l2_ctrl_handler_init(&rj54n1->hdl, 4);
1337         v4l2_ctrl_new_std(&rj54n1->hdl, &rj54n1_ctrl_ops,
1338                         V4L2_CID_VFLIP, 0, 1, 1, 0);
1339         v4l2_ctrl_new_std(&rj54n1->hdl, &rj54n1_ctrl_ops,
1340                         V4L2_CID_HFLIP, 0, 1, 1, 0);
1341         v4l2_ctrl_new_std(&rj54n1->hdl, &rj54n1_ctrl_ops,
1342                         V4L2_CID_GAIN, 0, 127, 1, 66);
1343         v4l2_ctrl_new_std(&rj54n1->hdl, &rj54n1_ctrl_ops,
1344                         V4L2_CID_AUTO_WHITE_BALANCE, 0, 1, 1, 1);
1345         rj54n1->subdev.ctrl_handler = &rj54n1->hdl;
1346         if (rj54n1->hdl.error)
1347                 return rj54n1->hdl.error;
1348
1349         rj54n1->clk_div         = clk_div;
1350         rj54n1->rect.left       = RJ54N1_COLUMN_SKIP;
1351         rj54n1->rect.top        = RJ54N1_ROW_SKIP;
1352         rj54n1->rect.width      = RJ54N1_MAX_WIDTH;
1353         rj54n1->rect.height     = RJ54N1_MAX_HEIGHT;
1354         rj54n1->width           = RJ54N1_MAX_WIDTH;
1355         rj54n1->height          = RJ54N1_MAX_HEIGHT;
1356         rj54n1->fmt             = &rj54n1_colour_fmts[0];
1357         rj54n1->resize          = 1024;
1358         rj54n1->tgclk_mhz       = (rj54n1_priv->mclk_freq / PLL_L * PLL_N) /
1359                 (clk_div.ratio_tg + 1) / (clk_div.ratio_t + 1);
1360
1361         rj54n1->clk = v4l2_clk_get(&client->dev, "mclk");
1362         if (IS_ERR(rj54n1->clk)) {
1363                 ret = PTR_ERR(rj54n1->clk);
1364                 goto eclkget;
1365         }
1366
1367         ret = rj54n1_video_probe(client, rj54n1_priv);
1368         if (ret < 0) {
1369                 v4l2_clk_put(rj54n1->clk);
1370 eclkget:
1371                 v4l2_ctrl_handler_free(&rj54n1->hdl);
1372         }
1373
1374         return ret;
1375 }
1376
1377 static int rj54n1_remove(struct i2c_client *client)
1378 {
1379         struct rj54n1 *rj54n1 = to_rj54n1(client);
1380         struct soc_camera_subdev_desc *ssdd = soc_camera_i2c_to_desc(client);
1381
1382         v4l2_clk_put(rj54n1->clk);
1383         v4l2_device_unregister_subdev(&rj54n1->subdev);
1384         if (ssdd->free_bus)
1385                 ssdd->free_bus(ssdd);
1386         v4l2_ctrl_handler_free(&rj54n1->hdl);
1387
1388         return 0;
1389 }
1390
1391 static const struct i2c_device_id rj54n1_id[] = {
1392         { "rj54n1cb0c", 0 },
1393         { }
1394 };
1395 MODULE_DEVICE_TABLE(i2c, rj54n1_id);
1396
1397 static struct i2c_driver rj54n1_i2c_driver = {
1398         .driver = {
1399                 .name = "rj54n1cb0c",
1400         },
1401         .probe          = rj54n1_probe,
1402         .remove         = rj54n1_remove,
1403         .id_table       = rj54n1_id,
1404 };
1405
1406 module_i2c_driver(rj54n1_i2c_driver);
1407
1408 MODULE_DESCRIPTION("Sharp RJ54N1CB0C Camera driver");
1409 MODULE_AUTHOR("Guennadi Liakhovetski <g.liakhovetski@gmx.de>");
1410 MODULE_LICENSE("GPL v2");