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/videodev2.h>
  15 #include <linux/module.h>
  16
  17 #include <media/rj54n1cb0c.h>
  18 #include <media/soc_camera.h>
  19 #include <media/soc_mediabus.h>
  20 #include <media/v4l2-subdev.h>
  21 #include <media/v4l2-chip-ident.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 rj54n1_clock_div clk_div;
 153         const struct rj54n1_datafmt *fmt;
 154         struct v4l2_rect rect;  /* Sensor window */
 155         unsigned int tgclk_mhz;
 156         bool auto_wb;
 157         unsigned short width;   /* Output window */
 158         unsigned short height;
 159         unsigned short resize;  /* Sensor * 1024 / resize = Output */
 160         unsigned short scale;
 161         u8 bank;
 162 };
 163
 164 struct rj54n1_reg_val {
 165         u16 reg;
 166         u8 val;
 167 };
 168
 169 static const struct rj54n1_reg_val bank_4[] = {
 170         {0x417, 0},
 171         {0x42c, 0},
 172         {0x42d, 0xf0},
 173         {0x42e, 0},
 174         {0x42f, 0x50},
 175         {0x430, 0xf5},
 176         {0x431, 0x16},
 177         {0x432, 0x20},
 178         {0x433, 0},
 179         {0x434, 0xc8},
 180         {0x43c, 8},
 181         {0x43e, 0x90},
 182         {0x445, 0x83},
 183         {0x4ba, 0x58},
 184         {0x4bb, 4},
 185         {0x4bc, 0x20},
 186         {0x4db, 4},
 187         {0x4fe, 2},
 188 };
 189
 190 static const struct rj54n1_reg_val bank_5[] = {
 191         {0x514, 0},
 192         {0x516, 0},
 193         {0x518, 0},
 194         {0x51a, 0},
 195         {0x51d, 0xff},
 196         {0x56f, 0x28},
 197         {0x575, 0x40},
 198         {0x5bc, 0x48},
 199         {0x5c1, 6},
 200         {0x5e5, 0x11},
 201         {0x5e6, 0x43},
 202         {0x5e7, 0x33},
 203         {0x5e8, 0x21},
 204         {0x5e9, 0x30},
 205         {0x5ea, 0x0},
 206         {0x5eb, 0xa5},
 207         {0x5ec, 0xff},
 208         {0x5fe, 2},
 209 };
 210
 211 static const struct rj54n1_reg_val bank_7[] = {
 212         {0x70a, 0},
 213         {0x714, 0xff},
 214         {0x715, 0xff},
 215         {0x716, 0x1f},
 216         {0x7FE, 2},
 217 };
 218
 219 static const struct rj54n1_reg_val bank_8[] = {
 220         {0x800, 0x00},
 221         {0x801, 0x01},
 222         {0x802, 0x61},
 223         {0x805, 0x00},
 224         {0x806, 0x00},
 225         {0x807, 0x00},
 226         {0x808, 0x00},
 227         {0x809, 0x01},
 228         {0x80A, 0x61},
 229         {0x80B, 0x00},
 230         {0x80C, 0x01},
 231         {0x80D, 0x00},
 232         {0x80E, 0x00},
 233         {0x80F, 0x00},
 234         {0x810, 0x00},
 235         {0x811, 0x01},
 236         {0x812, 0x61},
 237         {0x813, 0x00},
 238         {0x814, 0x11},
 239         {0x815, 0x00},
 240         {0x816, 0x41},
 241         {0x817, 0x00},
 242         {0x818, 0x51},
 243         {0x819, 0x01},
 244         {0x81A, 0x1F},
 245         {0x81B, 0x00},
 246         {0x81C, 0x01},
 247         {0x81D, 0x00},
 248         {0x81E, 0x11},
 249         {0x81F, 0x00},
 250         {0x820, 0x41},
 251         {0x821, 0x00},
 252         {0x822, 0x51},
 253         {0x823, 0x00},
 254         {0x824, 0x00},
 255         {0x825, 0x00},
 256         {0x826, 0x47},
 257         {0x827, 0x01},
 258         {0x828, 0x4F},
 259         {0x829, 0x00},
 260         {0x82A, 0x00},
 261         {0x82B, 0x00},
 262         {0x82C, 0x30},
 263         {0x82D, 0x00},
 264         {0x82E, 0x40},
 265         {0x82F, 0x00},
 266         {0x830, 0xB3},
 267         {0x831, 0x00},
 268         {0x832, 0xE3},
 269         {0x833, 0x00},
 270         {0x834, 0x00},
 271         {0x835, 0x00},
 272         {0x836, 0x00},
 273         {0x837, 0x00},
 274         {0x838, 0x00},
 275         {0x839, 0x01},
 276         {0x83A, 0x61},
 277         {0x83B, 0x00},
 278         {0x83C, 0x01},
 279         {0x83D, 0x00},
 280         {0x83E, 0x00},
 281         {0x83F, 0x00},
 282         {0x840, 0x00},
 283         {0x841, 0x01},
 284         {0x842, 0x61},
 285         {0x843, 0x00},
 286         {0x844, 0x1D},
 287         {0x845, 0x00},
 288         {0x846, 0x00},
 289         {0x847, 0x00},
 290         {0x848, 0x00},
 291         {0x849, 0x01},
 292         {0x84A, 0x1F},
 293         {0x84B, 0x00},
 294         {0x84C, 0x05},
 295         {0x84D, 0x00},
 296         {0x84E, 0x19},
 297         {0x84F, 0x01},
 298         {0x850, 0x21},
 299         {0x851, 0x01},
 300         {0x852, 0x5D},
 301         {0x853, 0x00},
 302         {0x854, 0x00},
 303         {0x855, 0x00},
 304         {0x856, 0x19},
 305         {0x857, 0x01},
 306         {0x858, 0x21},
 307         {0x859, 0x00},
 308         {0x85A, 0x00},
 309         {0x85B, 0x00},
 310         {0x85C, 0x00},
 311         {0x85D, 0x00},
 312         {0x85E, 0x00},
 313         {0x85F, 0x00},
 314         {0x860, 0xB3},
 315         {0x861, 0x00},
 316         {0x862, 0xE3},
 317         {0x863, 0x00},
 318         {0x864, 0x00},
 319         {0x865, 0x00},
 320         {0x866, 0x00},
 321         {0x867, 0x00},
 322         {0x868, 0x00},
 323         {0x869, 0xE2},
 324         {0x86A, 0x00},
 325         {0x86B, 0x01},
 326         {0x86C, 0x06},
 327         {0x86D, 0x00},
 328         {0x86E, 0x00},
 329         {0x86F, 0x00},
 330         {0x870, 0x60},
 331         {0x871, 0x8C},
 332         {0x872, 0x10},
 333         {0x873, 0x00},
 334         {0x874, 0xE0},
 335         {0x875, 0x00},
 336         {0x876, 0x27},
 337         {0x877, 0x01},
 338         {0x878, 0x00},
 339         {0x879, 0x00},
 340         {0x87A, 0x00},
 341         {0x87B, 0x03},
 342         {0x87C, 0x00},
 343         {0x87D, 0x00},
 344         {0x87E, 0x00},
 345         {0x87F, 0x00},
 346         {0x880, 0x00},
 347         {0x881, 0x00},
 348         {0x882, 0x00},
 349         {0x883, 0x00},
 350         {0x884, 0x00},
 351         {0x885, 0x00},
 352         {0x886, 0xF8},
 353         {0x887, 0x00},
 354         {0x888, 0x03},
 355         {0x889, 0x00},
 356         {0x88A, 0x64},
 357         {0x88B, 0x00},
 358         {0x88C, 0x03},
 359         {0x88D, 0x00},
 360         {0x88E, 0xB1},
 361         {0x88F, 0x00},
 362         {0x890, 0x03},
 363         {0x891, 0x01},
 364         {0x892, 0x1D},
 365         {0x893, 0x00},
 366         {0x894, 0x03},
 367         {0x895, 0x01},
 368         {0x896, 0x4B},
 369         {0x897, 0x00},
 370         {0x898, 0xE5},
 371         {0x899, 0x00},
 372         {0x89A, 0x01},
 373         {0x89B, 0x00},
 374         {0x89C, 0x01},
 375         {0x89D, 0x04},
 376         {0x89E, 0xC8},
 377         {0x89F, 0x00},
 378         {0x8A0, 0x01},
 379         {0x8A1, 0x01},
 380         {0x8A2, 0x61},
 381         {0x8A3, 0x00},
 382         {0x8A4, 0x01},
 383         {0x8A5, 0x00},
 384         {0x8A6, 0x00},
 385         {0x8A7, 0x00},
 386         {0x8A8, 0x00},
 387         {0x8A9, 0x00},
 388         {0x8AA, 0x7F},
 389         {0x8AB, 0x03},
 390         {0x8AC, 0x00},
 391         {0x8AD, 0x00},
 392         {0x8AE, 0x00},
 393         {0x8AF, 0x00},
 394         {0x8B0, 0x00},
 395         {0x8B1, 0x00},
 396         {0x8B6, 0x00},
 397         {0x8B7, 0x01},
 398         {0x8B8, 0x00},
 399         {0x8B9, 0x00},
 400         {0x8BA, 0x02},
 401         {0x8BB, 0x00},
 402         {0x8BC, 0xFF},
 403         {0x8BD, 0x00},
 404         {0x8FE, 2},
 405 };
 406
 407 static const struct rj54n1_reg_val bank_10[] = {
 408         {0x10bf, 0x69}
 409 };
 410
 411 /* Clock dividers - these are default register values, divider = register + 1 */
 412 static const struct rj54n1_clock_div clk_div = {
 413         .ratio_tg       = 3 /* default: 5 */,
 414         .ratio_t        = 4 /* default: 1 */,
 415         .ratio_r        = 4 /* default: 0 */,
 416         .ratio_op       = 1 /* default: 5 */,
 417         .ratio_o        = 9 /* default: 0 */,
 418 };
 419
 420 static struct rj54n1 *to_rj54n1(const struct i2c_client *client)
 421 {
 422         return container_of(i2c_get_clientdata(client), struct rj54n1, subdev);
 423 }
 424
 425 static int reg_read(struct i2c_client *client, const u16 reg)
 426 {
 427         struct rj54n1 *rj54n1 = to_rj54n1(client);
 428         int ret;
 429
 430         /* set bank */
 431         if (rj54n1->bank != reg >> 8) {
 432                 dev_dbg(&client->dev, "[0x%x] = 0x%x\n", 0xff, reg >> 8);
 433                 ret = i2c_smbus_write_byte_data(client, 0xff, reg >> 8);
 434                 if (ret < 0)
 435                         return ret;
 436                 rj54n1->bank = reg >> 8;
 437         }
 438         return i2c_smbus_read_byte_data(client, reg & 0xff);
 439 }
 440
 441 static int reg_write(struct i2c_client *client, const u16 reg,
 442                      const u8 data)
 443 {
 444         struct rj54n1 *rj54n1 = to_rj54n1(client);
 445         int ret;
 446
 447         /* set bank */
 448         if (rj54n1->bank != reg >> 8) {
 449                 dev_dbg(&client->dev, "[0x%x] = 0x%x\n", 0xff, reg >> 8);
 450                 ret = i2c_smbus_write_byte_data(client, 0xff, reg >> 8);
 451                 if (ret < 0)
 452                         return ret;
 453                 rj54n1->bank = reg >> 8;
 454         }
 455         dev_dbg(&client->dev, "[0x%x] = 0x%x\n", reg & 0xff, data);
 456         return i2c_smbus_write_byte_data(client, reg & 0xff, data);
 457 }
 458
 459 static int reg_set(struct i2c_client *client, const u16 reg,
 460                    const u8 data, const u8 mask)
 461 {
 462         int ret;
 463
 464         ret = reg_read(client, reg);
 465         if (ret < 0)
 466                 return ret;
 467         return reg_write(client, reg, (ret & ~mask) | (data & mask));
 468 }
 469
 470 static int reg_write_multiple(struct i2c_client *client,
 471                               const struct rj54n1_reg_val *rv, const int n)
 472 {
 473         int i, ret;
 474
 475         for (i = 0; i < n; i++) {
 476                 ret = reg_write(client, rv->reg, rv->val);
 477                 if (ret < 0)
 478                         return ret;
 479                 rv++;
 480         }
 481
 482         return 0;
 483 }
 484
 485 static int rj54n1_enum_fmt(struct v4l2_subdev *sd, unsigned int index,
 486                            enum v4l2_mbus_pixelcode *code)
 487 {
 488         if (index >= ARRAY_SIZE(rj54n1_colour_fmts))
 489                 return -EINVAL;
 490
 491         *code = rj54n1_colour_fmts[index].code;
 492         return 0;
 493 }
 494
 495 static int rj54n1_s_stream(struct v4l2_subdev *sd, int enable)
 496 {
 497         struct i2c_client *client = v4l2_get_subdevdata(sd);
 498
 499         /* Switch between preview and still shot modes */
 500         return reg_set(client, RJ54N1_STILL_CONTROL, (!enable) << 7, 0x80);
 501 }
 502
 503 static int rj54n1_set_bus_param(struct soc_camera_device *icd,
 504                                 unsigned long flags)
 505 {
 506         struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
 507         struct i2c_client *client = v4l2_get_subdevdata(sd);
 508         /* Figures 2.5-1 to 2.5-3 - default falling pixclk edge */
 509
 510         if (flags & SOCAM_PCLK_SAMPLE_RISING)
 511                 return reg_write(client, RJ54N1_OUT_SIGPO, 1 << 4);
 512         else
 513                 return reg_write(client, RJ54N1_OUT_SIGPO, 0);
 514 }
 515
 516 static unsigned long rj54n1_query_bus_param(struct soc_camera_device *icd)
 517 {
 518         struct soc_camera_link *icl = to_soc_camera_link(icd);
 519         const unsigned long flags =
 520                 SOCAM_PCLK_SAMPLE_RISING | SOCAM_PCLK_SAMPLE_FALLING |
 521                 SOCAM_MASTER | SOCAM_DATAWIDTH_8 |
 522                 SOCAM_HSYNC_ACTIVE_HIGH | SOCAM_VSYNC_ACTIVE_HIGH |
 523                 SOCAM_DATA_ACTIVE_HIGH;
 524
 525         return soc_camera_apply_sensor_flags(icl, flags);
 526 }
 527
 528 static int rj54n1_set_rect(struct i2c_client *client,
 529                            u16 reg_x, u16 reg_y, u16 reg_xy,
 530                            u32 width, u32 height)
 531 {
 532         int ret;
 533
 534         ret = reg_write(client, reg_xy,
 535                         ((width >> 4) & 0x70) |
 536                         ((height >> 8) & 7));
 537
 538         if (!ret)
 539                 ret = reg_write(client, reg_x, width & 0xff);
 540         if (!ret)
 541                 ret = reg_write(client, reg_y, height & 0xff);
 542
 543         return ret;
 544 }
 545
 546 /*
 547  * Some commands, specifically certain initialisation sequences, require
 548  * a commit operation.
 549  */
 550 static int rj54n1_commit(struct i2c_client *client)
 551 {
 552         int ret = reg_write(client, RJ54N1_INIT_START, 1);
 553         msleep(10);
 554         if (!ret)
 555                 ret = reg_write(client, RJ54N1_INIT_START, 0);
 556         return ret;
 557 }
 558
 559 static int rj54n1_sensor_scale(struct v4l2_subdev *sd, s32 *in_w, s32 *in_h,
 560                                s32 *out_w, s32 *out_h);
 561
 562 static int rj54n1_s_crop(struct v4l2_subdev *sd, struct v4l2_crop *a)
 563 {
 564         struct i2c_client *client = v4l2_get_subdevdata(sd);
 565         struct rj54n1 *rj54n1 = to_rj54n1(client);
 566         struct v4l2_rect *rect = &a->c;
 567         int dummy = 0, output_w, output_h,
 568                 input_w = rect->width, input_h = rect->height;
 569         int ret;
 570
 571         /* arbitrary minimum width and height, edges unimportant */
 572         soc_camera_limit_side(&dummy, &input_w,
 573                      RJ54N1_COLUMN_SKIP, 8, RJ54N1_MAX_WIDTH);
 574
 575         soc_camera_limit_side(&dummy, &input_h,
 576                      RJ54N1_ROW_SKIP, 8, RJ54N1_MAX_HEIGHT);
 577
 578         output_w = (input_w * 1024 + rj54n1->resize / 2) / rj54n1->resize;
 579         output_h = (input_h * 1024 + rj54n1->resize / 2) / rj54n1->resize;
 580
 581         dev_dbg(&client->dev, "Scaling for %dx%d : %u = %dx%d\n",
 582                 input_w, input_h, rj54n1->resize, output_w, output_h);
 583
 584         ret = rj54n1_sensor_scale(sd, &input_w, &input_h, &output_w, &output_h);
 585         if (ret < 0)
 586                 return ret;
 587
 588         rj54n1->width           = output_w;
 589         rj54n1->height          = output_h;
 590         rj54n1->resize          = ret;
 591         rj54n1->rect.width      = input_w;
 592         rj54n1->rect.height     = input_h;
 593
 594         return 0;
 595 }
 596
 597 static int rj54n1_g_crop(struct v4l2_subdev *sd, struct v4l2_crop *a)
 598 {
 599         struct i2c_client *client = v4l2_get_subdevdata(sd);
 600         struct rj54n1 *rj54n1 = to_rj54n1(client);
 601
 602         a->c    = rj54n1->rect;
 603         a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 604
 605         return 0;
 606 }
 607
 608 static int rj54n1_cropcap(struct v4l2_subdev *sd, struct v4l2_cropcap *a)
 609 {
 610         a->bounds.left                  = RJ54N1_COLUMN_SKIP;
 611         a->bounds.top                   = RJ54N1_ROW_SKIP;
 612         a->bounds.width                 = RJ54N1_MAX_WIDTH;
 613         a->bounds.height                = RJ54N1_MAX_HEIGHT;
 614         a->defrect                      = a->bounds;
 615         a->type                         = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 616         a->pixelaspect.numerator        = 1;
 617         a->pixelaspect.denominator      = 1;
 618
 619         return 0;
 620 }
 621
 622 static int rj54n1_g_fmt(struct v4l2_subdev *sd,
 623                         struct v4l2_mbus_framefmt *mf)
 624 {
 625         struct i2c_client *client = v4l2_get_subdevdata(sd);
 626         struct rj54n1 *rj54n1 = to_rj54n1(client);
 627
 628         mf->code        = rj54n1->fmt->code;
 629         mf->colorspace  = rj54n1->fmt->colorspace;
 630         mf->field       = V4L2_FIELD_NONE;
 631         mf->width       = rj54n1->width;
 632         mf->height      = rj54n1->height;
 633
 634         return 0;
 635 }
 636
 637 /*
 638  * The actual geometry configuration routine. It scales the input window into
 639  * the output one, updates the window sizes and returns an error or the resize
 640  * coefficient on success. Note: we only use the "Fixed Scaling" on this camera.
 641  */
 642 static int rj54n1_sensor_scale(struct v4l2_subdev *sd, s32 *in_w, s32 *in_h,
 643                                s32 *out_w, s32 *out_h)
 644 {
 645         struct i2c_client *client = v4l2_get_subdevdata(sd);
 646         struct rj54n1 *rj54n1 = to_rj54n1(client);
 647         unsigned int skip, resize, input_w = *in_w, input_h = *in_h,
 648                 output_w = *out_w, output_h = *out_h;
 649         u16 inc_sel, wb_bit8, wb_left, wb_right, wb_top, wb_bottom;
 650         unsigned int peak, peak_50, peak_60;
 651         int ret;
 652
 653         /*
 654          * We have a problem with crops, where the window is larger than 512x384
 655          * and output window is larger than a half of the input one. In this
 656          * case we have to either reduce the input window to equal or below
 657          * 512x384 or the output window to equal or below 1/2 of the input.
 658          */
 659         if (output_w > max(512U, input_w / 2)) {
 660                 if (2 * output_w > RJ54N1_MAX_WIDTH) {
 661                         input_w = RJ54N1_MAX_WIDTH;
 662                         output_w = RJ54N1_MAX_WIDTH / 2;
 663                 } else {
 664                         input_w = output_w * 2;
 665                 }
 666
 667                 dev_dbg(&client->dev, "Adjusted output width: in %u, out %u\n",
 668                         input_w, output_w);
 669         }
 670
 671         if (output_h > max(384U, input_h / 2)) {
 672                 if (2 * output_h > RJ54N1_MAX_HEIGHT) {
 673                         input_h = RJ54N1_MAX_HEIGHT;
 674                         output_h = RJ54N1_MAX_HEIGHT / 2;
 675                 } else {
 676                         input_h = output_h * 2;
 677                 }
 678
 679                 dev_dbg(&client->dev, "Adjusted output height: in %u, out %u\n",
 680                         input_h, output_h);
 681         }
 682
 683         /* Idea: use the read mode for snapshots, handle separate geometries */
 684         ret = rj54n1_set_rect(client, RJ54N1_X_OUTPUT_SIZE_S_L,
 685                               RJ54N1_Y_OUTPUT_SIZE_S_L,
 686                               RJ54N1_XY_OUTPUT_SIZE_S_H, output_w, output_h);
 687         if (!ret)
 688                 ret = rj54n1_set_rect(client, RJ54N1_X_OUTPUT_SIZE_P_L,
 689                               RJ54N1_Y_OUTPUT_SIZE_P_L,
 690                               RJ54N1_XY_OUTPUT_SIZE_P_H, output_w, output_h);
 691
 692         if (ret < 0)
 693                 return ret;
 694
 695         if (output_w > input_w && output_h > input_h) {
 696                 input_w = output_w;
 697                 input_h = output_h;
 698
 699                 resize = 1024;
 700         } else {
 701                 unsigned int resize_x, resize_y;
 702                 resize_x = (input_w * 1024 + output_w / 2) / output_w;
 703                 resize_y = (input_h * 1024 + output_h / 2) / output_h;
 704
 705                 /* We want max(resize_x, resize_y), check if it still fits */
 706                 if (resize_x > resize_y &&
 707                     (output_h * resize_x + 512) / 1024 > RJ54N1_MAX_HEIGHT)
 708                         resize = (RJ54N1_MAX_HEIGHT * 1024 + output_h / 2) /
 709                                 output_h;
 710                 else if (resize_y > resize_x &&
 711                          (output_w * resize_y + 512) / 1024 > RJ54N1_MAX_WIDTH)
 712                         resize = (RJ54N1_MAX_WIDTH * 1024 + output_w / 2) /
 713                                 output_w;
 714                 else
 715                         resize = max(resize_x, resize_y);
 716
 717                 /* Prohibited value ranges */
 718                 switch (resize) {
 719                 case 2040 ... 2047:
 720                         resize = 2039;
 721                         break;
 722                 case 4080 ... 4095:
 723                         resize = 4079;
 724                         break;
 725                 case 8160 ... 8191:
 726                         resize = 8159;
 727                         break;
 728                 case 16320 ... 16384:
 729                         resize = 16319;
 730                 }
 731         }
 732
 733         /* Set scaling */
 734         ret = reg_write(client, RJ54N1_RESIZE_HOLD_L, resize & 0xff);
 735         if (!ret)
 736                 ret = reg_write(client, RJ54N1_RESIZE_HOLD_H, resize >> 8);
 737
 738         if (ret < 0)
 739                 return ret;
 740
 741         /*
 742          * Configure a skipping bitmask. The sensor will select a skipping value
 743          * among set bits automatically. This is very unclear in the datasheet
 744          * too. I was told, in this register one enables all skipping values,
 745          * that are required for a specific resize, and the camera selects
 746          * automatically, which ones to use. But it is unclear how to identify,
 747          * which cropping values are needed. Secondly, why don't we just set all
 748          * bits and let the camera choose? Would it increase processing time and
 749          * reduce the framerate? Using 0xfffc for INC_USE_SEL doesn't seem to
 750          * improve the image quality or stability for larger frames (see comment
 751          * above), but I didn't check the framerate.
 752          */
 753         skip = min(resize / 1024, 15U);
 754
 755         inc_sel = 1 << skip;
 756
 757         if (inc_sel <= 2)
 758                 inc_sel = 0xc;
 759         else if (resize & 1023 && skip < 15)
 760                 inc_sel |= 1 << (skip + 1);
 761
 762         ret = reg_write(client, RJ54N1_INC_USE_SEL_L, inc_sel & 0xfc);
 763         if (!ret)
 764                 ret = reg_write(client, RJ54N1_INC_USE_SEL_H, inc_sel >> 8);
 765
 766         if (!rj54n1->auto_wb) {
 767                 /* Auto white balance window */
 768                 wb_left   = output_w / 16;
 769                 wb_right  = (3 * output_w / 4 - 3) / 4;
 770                 wb_top    = output_h / 16;
 771                 wb_bottom = (3 * output_h / 4 - 3) / 4;
 772                 wb_bit8   = ((wb_left >> 2) & 0x40) | ((wb_top >> 4) & 0x10) |
 773                         ((wb_right >> 6) & 4) | ((wb_bottom >> 8) & 1);
 774
 775                 if (!ret)
 776                         ret = reg_write(client, RJ54N1_BIT8_WB, wb_bit8);
 777                 if (!ret)
 778                         ret = reg_write(client, RJ54N1_HCAPS_WB, wb_left);
 779                 if (!ret)
 780                         ret = reg_write(client, RJ54N1_VCAPS_WB, wb_top);
 781                 if (!ret)
 782                         ret = reg_write(client, RJ54N1_HCAPE_WB, wb_right);
 783                 if (!ret)
 784                         ret = reg_write(client, RJ54N1_VCAPE_WB, wb_bottom);
 785         }
 786
 787         /* Antiflicker */
 788         peak = 12 * RJ54N1_MAX_WIDTH * (1 << 14) * resize / rj54n1->tgclk_mhz /
 789                 10000;
 790         peak_50 = peak / 6;
 791         peak_60 = peak / 5;
 792
 793         if (!ret)
 794                 ret = reg_write(client, RJ54N1_PEAK_H,
 795                                 ((peak_50 >> 4) & 0xf0) | (peak_60 >> 8));
 796         if (!ret)
 797                 ret = reg_write(client, RJ54N1_PEAK_50, peak_50);
 798         if (!ret)
 799                 ret = reg_write(client, RJ54N1_PEAK_60, peak_60);
 800         if (!ret)
 801                 ret = reg_write(client, RJ54N1_PEAK_DIFF, peak / 150);
 802
 803         /* Start resizing */
 804         if (!ret)
 805                 ret = reg_write(client, RJ54N1_RESIZE_CONTROL,
 806                                 RESIZE_HOLD_SEL | RESIZE_GO | 1);
 807
 808         if (ret < 0)
 809                 return ret;
 810
 811         /* Constant taken from manufacturer's example */
 812         msleep(230);
 813
 814         ret = reg_write(client, RJ54N1_RESIZE_CONTROL, RESIZE_HOLD_SEL | 1);
 815         if (ret < 0)
 816                 return ret;
 817
 818         *in_w = (output_w * resize + 512) / 1024;
 819         *in_h = (output_h * resize + 512) / 1024;
 820         *out_w = output_w;
 821         *out_h = output_h;
 822
 823         dev_dbg(&client->dev, "Scaled for %dx%d : %u = %ux%u, skip %u\n",
 824                 *in_w, *in_h, resize, output_w, output_h, skip);
 825
 826         return resize;
 827 }
 828
 829 static int rj54n1_set_clock(struct i2c_client *client)
 830 {
 831         struct rj54n1 *rj54n1 = to_rj54n1(client);
 832         int ret;
 833
 834         /* Enable external clock */
 835         ret = reg_write(client, RJ54N1_RESET_STANDBY, E_EXCLK | SOFT_STDBY);
 836         /* Leave stand-by. Note: use this when implementing suspend / resume */
 837         if (!ret)
 838                 ret = reg_write(client, RJ54N1_RESET_STANDBY, E_EXCLK);
 839
 840         if (!ret)
 841                 ret = reg_write(client, RJ54N1_PLL_L, PLL_L);
 842         if (!ret)
 843                 ret = reg_write(client, RJ54N1_PLL_N, PLL_N);
 844
 845         /* TGCLK dividers */
 846         if (!ret)
 847                 ret = reg_write(client, RJ54N1_RATIO_TG,
 848                                 rj54n1->clk_div.ratio_tg);
 849         if (!ret)
 850                 ret = reg_write(client, RJ54N1_RATIO_T,
 851                                 rj54n1->clk_div.ratio_t);
 852         if (!ret)
 853                 ret = reg_write(client, RJ54N1_RATIO_R,
 854                                 rj54n1->clk_div.ratio_r);
 855
 856         /* Enable TGCLK & RAMP */
 857         if (!ret)
 858                 ret = reg_write(client, RJ54N1_RAMP_TGCLK_EN, 3);
 859
 860         /* Disable clock output */
 861         if (!ret)
 862                 ret = reg_write(client, RJ54N1_OCLK_DSP, 0);
 863
 864         /* Set divisors */
 865         if (!ret)
 866                 ret = reg_write(client, RJ54N1_RATIO_OP,
 867                                 rj54n1->clk_div.ratio_op);
 868         if (!ret)
 869                 ret = reg_write(client, RJ54N1_RATIO_O,
 870                                 rj54n1->clk_div.ratio_o);
 871
 872         /* Enable OCLK */
 873         if (!ret)
 874                 ret = reg_write(client, RJ54N1_OCLK_SEL_EN, 1);
 875
 876         /* Use PLL for Timing Generator, write 2 to reserved bits */
 877         if (!ret)
 878                 ret = reg_write(client, RJ54N1_TG_BYPASS, 2);
 879
 880         /* Take sensor out of reset */
 881         if (!ret)
 882                 ret = reg_write(client, RJ54N1_RESET_STANDBY,
 883                                 E_EXCLK | SEN_RSTX);
 884         /* Enable PLL */
 885         if (!ret)
 886                 ret = reg_write(client, RJ54N1_PLL_EN, 1);
 887
 888         /* Wait for PLL to stabilise */
 889         msleep(10);
 890
 891         /* Enable clock to frequency divider */
 892         if (!ret)
 893                 ret = reg_write(client, RJ54N1_CLK_RST, 1);
 894
 895         if (!ret)
 896                 ret = reg_read(client, RJ54N1_CLK_RST);
 897         if (ret != 1) {
 898                 dev_err(&client->dev,
 899                         "Resetting RJ54N1CB0C clock failed: %d!\n", ret);
 900                 return -EIO;
 901         }
 902
 903         /* Start the PLL */
 904         ret = reg_set(client, RJ54N1_OCLK_DSP, 1, 1);
 905
 906         /* Enable OCLK */
 907         if (!ret)
 908                 ret = reg_write(client, RJ54N1_OCLK_SEL_EN, 1);
 909
 910         return ret;
 911 }
 912
 913 static int rj54n1_reg_init(struct i2c_client *client)
 914 {
 915         struct rj54n1 *rj54n1 = to_rj54n1(client);
 916         int ret = rj54n1_set_clock(client);
 917
 918         if (!ret)
 919                 ret = reg_write_multiple(client, bank_7, ARRAY_SIZE(bank_7));
 920         if (!ret)
 921                 ret = reg_write_multiple(client, bank_10, ARRAY_SIZE(bank_10));
 922
 923         /* Set binning divisors */
 924         if (!ret)
 925                 ret = reg_write(client, RJ54N1_SCALE_1_2_LEV, 3 | (7 << 4));
 926         if (!ret)
 927                 ret = reg_write(client, RJ54N1_SCALE_4_LEV, 0xf);
 928
 929         /* Switch to fixed resize mode */
 930         if (!ret)
 931                 ret = reg_write(client, RJ54N1_RESIZE_CONTROL,
 932                                 RESIZE_HOLD_SEL | 1);
 933
 934         /* Set gain */
 935         if (!ret)
 936                 ret = reg_write(client, RJ54N1_Y_GAIN, 0x84);
 937
 938         /*
 939          * Mirror the image back: default is upside down and left-to-right...
 940          * Set manual preview / still shot switching
 941          */
 942         if (!ret)
 943                 ret = reg_write(client, RJ54N1_MIRROR_STILL_MODE, 0x27);
 944
 945         if (!ret)
 946                 ret = reg_write_multiple(client, bank_4, ARRAY_SIZE(bank_4));
 947
 948         /* Auto exposure area */
 949         if (!ret)
 950                 ret = reg_write(client, RJ54N1_EXPOSURE_CONTROL, 0x80);
 951         /* Check current auto WB config */
 952         if (!ret)
 953                 ret = reg_read(client, RJ54N1_WB_SEL_WEIGHT_I);
 954         if (ret >= 0) {
 955                 rj54n1->auto_wb = ret & 0x80;
 956                 ret = reg_write_multiple(client, bank_5, ARRAY_SIZE(bank_5));
 957         }
 958         if (!ret)
 959                 ret = reg_write_multiple(client, bank_8, ARRAY_SIZE(bank_8));
 960
 961         if (!ret)
 962                 ret = reg_write(client, RJ54N1_RESET_STANDBY,
 963                                 E_EXCLK | DSP_RSTX | SEN_RSTX);
 964
 965         /* Commit init */
 966         if (!ret)
 967                 ret = rj54n1_commit(client);
 968
 969         /* Take DSP, TG, sensor out of reset */
 970         if (!ret)
 971                 ret = reg_write(client, RJ54N1_RESET_STANDBY,
 972                                 E_EXCLK | DSP_RSTX | TG_RSTX | SEN_RSTX);
 973
 974         /* Start register update? Same register as 0x?FE in many bank_* sets */
 975         if (!ret)
 976                 ret = reg_write(client, RJ54N1_FWFLG, 2);
 977
 978         /* Constant taken from manufacturer's example */
 979         msleep(700);
 980
 981         return ret;
 982 }
 983
 984 static int rj54n1_try_fmt(struct v4l2_subdev *sd,
 985                           struct v4l2_mbus_framefmt *mf)
 986 {
 987         struct i2c_client *client = v4l2_get_subdevdata(sd);
 988         struct rj54n1 *rj54n1 = to_rj54n1(client);
 989         const struct rj54n1_datafmt *fmt;
 990         int align = mf->code == V4L2_MBUS_FMT_SBGGR10_1X10 ||
 991                 mf->code == V4L2_MBUS_FMT_SBGGR10_2X8_PADHI_BE ||
 992                 mf->code == V4L2_MBUS_FMT_SBGGR10_2X8_PADLO_BE ||
 993                 mf->code == V4L2_MBUS_FMT_SBGGR10_2X8_PADHI_LE ||
 994                 mf->code == V4L2_MBUS_FMT_SBGGR10_2X8_PADLO_LE;
 995
 996         dev_dbg(&client->dev, "%s: code = %d, width = %u, height = %u\n",
 997                 __func__, mf->code, mf->width, mf->height);
 998
 999         fmt = rj54n1_find_datafmt(mf->code, rj54n1_colour_fmts,
1000                                   ARRAY_SIZE(rj54n1_colour_fmts));
1001         if (!fmt) {
1002                 fmt = rj54n1->fmt;
1003                 mf->code = fmt->code;
1004         }
1005
1006         mf->field       = V4L2_FIELD_NONE;
1007         mf->colorspace  = fmt->colorspace;
1008
1009         v4l_bound_align_image(&mf->width, 112, RJ54N1_MAX_WIDTH, align,
1010                               &mf->height, 84, RJ54N1_MAX_HEIGHT, align, 0);
1011
1012         return 0;
1013 }
1014
1015 static int rj54n1_s_fmt(struct v4l2_subdev *sd,
1016                         struct v4l2_mbus_framefmt *mf)
1017 {
1018         struct i2c_client *client = v4l2_get_subdevdata(sd);
1019         struct rj54n1 *rj54n1 = to_rj54n1(client);
1020         const struct rj54n1_datafmt *fmt;
1021         int output_w, output_h, max_w, max_h,
1022                 input_w = rj54n1->rect.width, input_h = rj54n1->rect.height;
1023         int ret;
1024
1025         /*
1026          * The host driver can call us without .try_fmt(), so, we have to take
1027          * care ourseleves
1028          */
1029         rj54n1_try_fmt(sd, mf);
1030
1031         /*
1032          * Verify if the sensor has just been powered on. TODO: replace this
1033          * with proper PM, when a suitable API is available.
1034          */
1035         ret = reg_read(client, RJ54N1_RESET_STANDBY);
1036         if (ret < 0)
1037                 return ret;
1038
1039         if (!(ret & E_EXCLK)) {
1040                 ret = rj54n1_reg_init(client);
1041                 if (ret < 0)
1042                         return ret;
1043         }
1044
1045         dev_dbg(&client->dev, "%s: code = %d, width = %u, height = %u\n",
1046                 __func__, mf->code, mf->width, mf->height);
1047
1048         /* RA_SEL_UL is only relevant for raw modes, ignored otherwise. */
1049         switch (mf->code) {
1050         case V4L2_MBUS_FMT_YUYV8_2X8:
1051                 ret = reg_write(client, RJ54N1_OUT_SEL, 0);
1052                 if (!ret)
1053                         ret = reg_set(client, RJ54N1_BYTE_SWAP, 8, 8);
1054                 break;
1055         case V4L2_MBUS_FMT_YVYU8_2X8:
1056                 ret = reg_write(client, RJ54N1_OUT_SEL, 0);
1057                 if (!ret)
1058                         ret = reg_set(client, RJ54N1_BYTE_SWAP, 0, 8);
1059                 break;
1060         case V4L2_MBUS_FMT_RGB565_2X8_LE:
1061                 ret = reg_write(client, RJ54N1_OUT_SEL, 0x11);
1062                 if (!ret)
1063                         ret = reg_set(client, RJ54N1_BYTE_SWAP, 8, 8);
1064                 break;
1065         case V4L2_MBUS_FMT_RGB565_2X8_BE:
1066                 ret = reg_write(client, RJ54N1_OUT_SEL, 0x11);
1067                 if (!ret)
1068                         ret = reg_set(client, RJ54N1_BYTE_SWAP, 0, 8);
1069                 break;
1070         case V4L2_MBUS_FMT_SBGGR10_2X8_PADLO_LE:
1071                 ret = reg_write(client, RJ54N1_OUT_SEL, 4);
1072                 if (!ret)
1073                         ret = reg_set(client, RJ54N1_BYTE_SWAP, 8, 8);
1074                 if (!ret)
1075                         ret = reg_write(client, RJ54N1_RA_SEL_UL, 0);
1076                 break;
1077         case V4L2_MBUS_FMT_SBGGR10_2X8_PADHI_LE:
1078                 ret = reg_write(client, RJ54N1_OUT_SEL, 4);
1079                 if (!ret)
1080                         ret = reg_set(client, RJ54N1_BYTE_SWAP, 8, 8);
1081                 if (!ret)
1082                         ret = reg_write(client, RJ54N1_RA_SEL_UL, 8);
1083                 break;
1084         case V4L2_MBUS_FMT_SBGGR10_2X8_PADLO_BE:
1085                 ret = reg_write(client, RJ54N1_OUT_SEL, 4);
1086                 if (!ret)
1087                         ret = reg_set(client, RJ54N1_BYTE_SWAP, 0, 8);
1088                 if (!ret)
1089                         ret = reg_write(client, RJ54N1_RA_SEL_UL, 0);
1090                 break;
1091         case V4L2_MBUS_FMT_SBGGR10_2X8_PADHI_BE:
1092                 ret = reg_write(client, RJ54N1_OUT_SEL, 4);
1093                 if (!ret)
1094                         ret = reg_set(client, RJ54N1_BYTE_SWAP, 0, 8);
1095                 if (!ret)
1096                         ret = reg_write(client, RJ54N1_RA_SEL_UL, 8);
1097                 break;
1098         case V4L2_MBUS_FMT_SBGGR10_1X10:
1099                 ret = reg_write(client, RJ54N1_OUT_SEL, 5);
1100                 break;
1101         default:
1102                 ret = -EINVAL;
1103         }
1104
1105         /* Special case: a raw mode with 10 bits of data per clock tick */
1106         if (!ret)
1107                 ret = reg_set(client, RJ54N1_OCLK_SEL_EN,
1108                               (mf->code == V4L2_MBUS_FMT_SBGGR10_1X10) << 1, 2);
1109
1110         if (ret < 0)
1111                 return ret;
1112
1113         /* Supported scales 1:1 >= scale > 1:16 */
1114         max_w = mf->width * (16 * 1024 - 1) / 1024;
1115         if (input_w > max_w)
1116                 input_w = max_w;
1117         max_h = mf->height * (16 * 1024 - 1) / 1024;
1118         if (input_h > max_h)
1119                 input_h = max_h;
1120
1121         output_w = mf->width;
1122         output_h = mf->height;
1123
1124         ret = rj54n1_sensor_scale(sd, &input_w, &input_h, &output_w, &output_h);
1125         if (ret < 0)
1126                 return ret;
1127
1128         fmt = rj54n1_find_datafmt(mf->code, rj54n1_colour_fmts,
1129                                   ARRAY_SIZE(rj54n1_colour_fmts));
1130
1131         rj54n1->fmt             = fmt;
1132         rj54n1->resize          = ret;
1133         rj54n1->rect.width      = input_w;
1134         rj54n1->rect.height     = input_h;
1135         rj54n1->width           = output_w;
1136         rj54n1->height          = output_h;
1137
1138         mf->width               = output_w;
1139         mf->height              = output_h;
1140         mf->field               = V4L2_FIELD_NONE;
1141         mf->colorspace          = fmt->colorspace;
1142
1143         return 0;
1144 }
1145
1146 static int rj54n1_g_chip_ident(struct v4l2_subdev *sd,
1147                                struct v4l2_dbg_chip_ident *id)
1148 {
1149         struct i2c_client *client = v4l2_get_subdevdata(sd);
1150
1151         if (id->match.type != V4L2_CHIP_MATCH_I2C_ADDR)
1152                 return -EINVAL;
1153
1154         if (id->match.addr != client->addr)
1155                 return -ENODEV;
1156
1157         id->ident       = V4L2_IDENT_RJ54N1CB0C;
1158         id->revision    = 0;
1159
1160         return 0;
1161 }
1162
1163 #ifdef CONFIG_VIDEO_ADV_DEBUG
1164 static int rj54n1_g_register(struct v4l2_subdev *sd,
1165                              struct v4l2_dbg_register *reg)
1166 {
1167         struct i2c_client *client = v4l2_get_subdevdata(sd);
1168
1169         if (reg->match.type != V4L2_CHIP_MATCH_I2C_ADDR ||
1170             reg->reg < 0x400 || reg->reg > 0x1fff)
1171                 /* Registers > 0x0800 are only available from Sharp support */
1172                 return -EINVAL;
1173
1174         if (reg->match.addr != client->addr)
1175                 return -ENODEV;
1176
1177         reg->size = 1;
1178         reg->val = reg_read(client, reg->reg);
1179
1180         if (reg->val > 0xff)
1181                 return -EIO;
1182
1183         return 0;
1184 }
1185
1186 static int rj54n1_s_register(struct v4l2_subdev *sd,
1187                              struct v4l2_dbg_register *reg)
1188 {
1189         struct i2c_client *client = v4l2_get_subdevdata(sd);
1190
1191         if (reg->match.type != V4L2_CHIP_MATCH_I2C_ADDR ||
1192             reg->reg < 0x400 || reg->reg > 0x1fff)
1193                 /* Registers >= 0x0800 are only available from Sharp support */
1194                 return -EINVAL;
1195
1196         if (reg->match.addr != client->addr)
1197                 return -ENODEV;
1198
1199         if (reg_write(client, reg->reg, reg->val) < 0)
1200                 return -EIO;
1201
1202         return 0;
1203 }
1204 #endif
1205
1206 static const struct v4l2_queryctrl rj54n1_controls[] = {
1207         {
1208                 .id             = V4L2_CID_VFLIP,
1209                 .type           = V4L2_CTRL_TYPE_BOOLEAN,
1210                 .name           = "Flip Vertically",
1211                 .minimum        = 0,
1212                 .maximum        = 1,
1213                 .step           = 1,
1214                 .default_value  = 0,
1215         }, {
1216                 .id             = V4L2_CID_HFLIP,
1217                 .type           = V4L2_CTRL_TYPE_BOOLEAN,
1218                 .name           = "Flip Horizontally",
1219                 .minimum        = 0,
1220                 .maximum        = 1,
1221                 .step           = 1,
1222                 .default_value  = 0,
1223         }, {
1224                 .id             = V4L2_CID_GAIN,
1225                 .type           = V4L2_CTRL_TYPE_INTEGER,
1226                 .name           = "Gain",
1227                 .minimum        = 0,
1228                 .maximum        = 127,
1229                 .step           = 1,
1230                 .default_value  = 66,
1231                 .flags          = V4L2_CTRL_FLAG_SLIDER,
1232         }, {
1233                 .id             = V4L2_CID_AUTO_WHITE_BALANCE,
1234                 .type           = V4L2_CTRL_TYPE_BOOLEAN,
1235                 .name           = "Auto white balance",
1236                 .minimum        = 0,
1237                 .maximum        = 1,
1238                 .step           = 1,
1239                 .default_value  = 1,
1240         },
1241 };
1242
1243 static struct soc_camera_ops rj54n1_ops = {
1244         .set_bus_param          = rj54n1_set_bus_param,
1245         .query_bus_param        = rj54n1_query_bus_param,
1246         .controls               = rj54n1_controls,
1247         .num_controls           = ARRAY_SIZE(rj54n1_controls),
1248 };
1249
1250 static int rj54n1_g_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
1251 {
1252         struct i2c_client *client = v4l2_get_subdevdata(sd);
1253         struct rj54n1 *rj54n1 = to_rj54n1(client);
1254         int data;
1255
1256         switch (ctrl->id) {
1257         case V4L2_CID_VFLIP:
1258                 data = reg_read(client, RJ54N1_MIRROR_STILL_MODE);
1259                 if (data < 0)
1260                         return -EIO;
1261                 ctrl->value = !(data & 1);
1262                 break;
1263         case V4L2_CID_HFLIP:
1264                 data = reg_read(client, RJ54N1_MIRROR_STILL_MODE);
1265                 if (data < 0)
1266                         return -EIO;
1267                 ctrl->value = !(data & 2);
1268                 break;
1269         case V4L2_CID_GAIN:
1270                 data = reg_read(client, RJ54N1_Y_GAIN);
1271                 if (data < 0)
1272                         return -EIO;
1273
1274                 ctrl->value = data / 2;
1275                 break;
1276         case V4L2_CID_AUTO_WHITE_BALANCE:
1277                 ctrl->value = rj54n1->auto_wb;
1278                 break;
1279         }
1280
1281         return 0;
1282 }
1283
1284 static int rj54n1_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
1285 {
1286         int data;
1287         struct i2c_client *client = v4l2_get_subdevdata(sd);
1288         struct rj54n1 *rj54n1 = to_rj54n1(client);
1289         const struct v4l2_queryctrl *qctrl;
1290
1291         qctrl = soc_camera_find_qctrl(&rj54n1_ops, ctrl->id);
1292         if (!qctrl)
1293                 return -EINVAL;
1294
1295         switch (ctrl->id) {
1296         case V4L2_CID_VFLIP:
1297                 if (ctrl->value)
1298                         data = reg_set(client, RJ54N1_MIRROR_STILL_MODE, 0, 1);
1299                 else
1300                         data = reg_set(client, RJ54N1_MIRROR_STILL_MODE, 1, 1);
1301                 if (data < 0)
1302                         return -EIO;
1303                 break;
1304         case V4L2_CID_HFLIP:
1305                 if (ctrl->value)
1306                         data = reg_set(client, RJ54N1_MIRROR_STILL_MODE, 0, 2);
1307                 else
1308                         data = reg_set(client, RJ54N1_MIRROR_STILL_MODE, 2, 2);
1309                 if (data < 0)
1310                         return -EIO;
1311                 break;
1312         case V4L2_CID_GAIN:
1313                 if (ctrl->value > qctrl->maximum ||
1314                     ctrl->value < qctrl->minimum)
1315                         return -EINVAL;
1316                 else if (reg_write(client, RJ54N1_Y_GAIN, ctrl->value * 2) < 0)
1317                         return -EIO;
1318                 break;
1319         case V4L2_CID_AUTO_WHITE_BALANCE:
1320                 /* Auto WB area - whole image */
1321                 if (reg_set(client, RJ54N1_WB_SEL_WEIGHT_I, ctrl->value << 7,
1322                             0x80) < 0)
1323                         return -EIO;
1324                 rj54n1->auto_wb = ctrl->value;
1325                 break;
1326         }
1327
1328         return 0;
1329 }
1330
1331 static struct v4l2_subdev_core_ops rj54n1_subdev_core_ops = {
1332         .g_ctrl         = rj54n1_g_ctrl,
1333         .s_ctrl         = rj54n1_s_ctrl,
1334         .g_chip_ident   = rj54n1_g_chip_ident,
1335 #ifdef CONFIG_VIDEO_ADV_DEBUG
1336         .g_register     = rj54n1_g_register,
1337         .s_register     = rj54n1_s_register,
1338 #endif
1339 };
1340
1341 static struct v4l2_subdev_video_ops rj54n1_subdev_video_ops = {
1342         .s_stream       = rj54n1_s_stream,
1343         .s_mbus_fmt     = rj54n1_s_fmt,
1344         .g_mbus_fmt     = rj54n1_g_fmt,
1345         .try_mbus_fmt   = rj54n1_try_fmt,
1346         .enum_mbus_fmt  = rj54n1_enum_fmt,
1347         .g_crop         = rj54n1_g_crop,
1348         .s_crop         = rj54n1_s_crop,
1349         .cropcap        = rj54n1_cropcap,
1350 };
1351
1352 static struct v4l2_subdev_ops rj54n1_subdev_ops = {
1353         .core   = &rj54n1_subdev_core_ops,
1354         .video  = &rj54n1_subdev_video_ops,
1355 };
1356
1357 /*
1358  * Interface active, can use i2c. If it fails, it can indeed mean, that
1359  * this wasn't our capture interface, so, we wait for the right one
1360  */
1361 static int rj54n1_video_probe(struct soc_camera_device *icd,
1362                               struct i2c_client *client,
1363                               struct rj54n1_pdata *priv)
1364 {
1365         int data1, data2;
1366         int ret;
1367
1368         /* We must have a parent by now. And it cannot be a wrong one. */
1369         BUG_ON(!icd->parent ||
1370                to_soc_camera_host(icd->parent)->nr != icd->iface);
1371
1372         /* Read out the chip version register */
1373         data1 = reg_read(client, RJ54N1_DEV_CODE);
1374         data2 = reg_read(client, RJ54N1_DEV_CODE2);
1375
1376         if (data1 != 0x51 || data2 != 0x10) {
1377                 ret = -ENODEV;
1378                 dev_info(&client->dev, "No RJ54N1CB0C found, read 0x%x:0x%x\n",
1379                          data1, data2);
1380                 goto ei2c;
1381         }
1382
1383         /* Configure IOCTL polarity from the platform data: 0 or 1 << 7. */
1384         ret = reg_write(client, RJ54N1_IOC, priv->ioctl_high << 7);
1385         if (ret < 0)
1386                 goto ei2c;
1387
1388         dev_info(&client->dev, "Detected a RJ54N1CB0C chip ID 0x%x:0x%x\n",
1389                  data1, data2);
1390
1391 ei2c:
1392         return ret;
1393 }
1394
1395 static int rj54n1_probe(struct i2c_client *client,
1396                         const struct i2c_device_id *did)
1397 {
1398         struct rj54n1 *rj54n1;
1399         struct soc_camera_device *icd = client->dev.platform_data;
1400         struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent);
1401         struct soc_camera_link *icl;
1402         struct rj54n1_pdata *rj54n1_priv;
1403         int ret;
1404
1405         if (!icd) {
1406                 dev_err(&client->dev, "RJ54N1CB0C: missing soc-camera data!\n");
1407                 return -EINVAL;
1408         }
1409
1410         icl = to_soc_camera_link(icd);
1411         if (!icl || !icl->priv) {
1412                 dev_err(&client->dev, "RJ54N1CB0C: missing platform data!\n");
1413                 return -EINVAL;
1414         }
1415
1416         rj54n1_priv = icl->priv;
1417
1418         if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) {
1419                 dev_warn(&adapter->dev,
1420                          "I2C-Adapter doesn't support I2C_FUNC_SMBUS_BYTE\n");
1421                 return -EIO;
1422         }
1423
1424         rj54n1 = kzalloc(sizeof(struct rj54n1), GFP_KERNEL);
1425         if (!rj54n1)
1426                 return -ENOMEM;
1427
1428         v4l2_i2c_subdev_init(&rj54n1->subdev, client, &rj54n1_subdev_ops);
1429
1430         icd->ops                = &rj54n1_ops;
1431
1432         rj54n1->clk_div         = clk_div;
1433         rj54n1->rect.left       = RJ54N1_COLUMN_SKIP;
1434         rj54n1->rect.top        = RJ54N1_ROW_SKIP;
1435         rj54n1->rect.width      = RJ54N1_MAX_WIDTH;
1436         rj54n1->rect.height     = RJ54N1_MAX_HEIGHT;
1437         rj54n1->width           = RJ54N1_MAX_WIDTH;
1438         rj54n1->height          = RJ54N1_MAX_HEIGHT;
1439         rj54n1->fmt             = &rj54n1_colour_fmts[0];
1440         rj54n1->resize          = 1024;
1441         rj54n1->tgclk_mhz       = (rj54n1_priv->mclk_freq / PLL_L * PLL_N) /
1442                 (clk_div.ratio_tg + 1) / (clk_div.ratio_t + 1);
1443
1444         ret = rj54n1_video_probe(icd, client, rj54n1_priv);
1445         if (ret < 0) {
1446                 icd->ops = NULL;
1447                 kfree(rj54n1);
1448                 return ret;
1449         }
1450
1451         return ret;
1452 }
1453
1454 static int rj54n1_remove(struct i2c_client *client)
1455 {
1456         struct rj54n1 *rj54n1 = to_rj54n1(client);
1457         struct soc_camera_device *icd = client->dev.platform_data;
1458         struct soc_camera_link *icl = to_soc_camera_link(icd);
1459
1460         icd->ops = NULL;
1461         if (icl->free_bus)
1462                 icl->free_bus(icl);
1463         kfree(rj54n1);
1464
1465         return 0;
1466 }
1467
1468 static const struct i2c_device_id rj54n1_id[] = {
1469         { "rj54n1cb0c", 0 },
1470         { }
1471 };
1472 MODULE_DEVICE_TABLE(i2c, rj54n1_id);
1473
1474 static struct i2c_driver rj54n1_i2c_driver = {
1475         .driver = {
1476                 .name = "rj54n1cb0c",
1477         },
1478         .probe          = rj54n1_probe,
1479         .remove         = rj54n1_remove,
1480         .id_table       = rj54n1_id,
1481 };
1482
1483 static int __init rj54n1_mod_init(void)
1484 {
1485         return i2c_add_driver(&rj54n1_i2c_driver);
1486 }
1487
1488 static void __exit rj54n1_mod_exit(void)
1489 {
1490         i2c_del_driver(&rj54n1_i2c_driver);
1491 }
1492
1493 module_init(rj54n1_mod_init);
1494 module_exit(rj54n1_mod_exit);
1495
1496 MODULE_DESCRIPTION("Sharp RJ54N1CB0C Camera driver");
1497 MODULE_AUTHOR("Guennadi Liakhovetski <g.liakhovetski@gmx.de>");
1498 MODULE_LICENSE("GPL v2");