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
  16 #include <media/rj54n1cb0c.h>
  17 #include <media/soc_camera.h>
  18 #include <media/soc_mediabus.h>
  19 #include <media/v4l2-subdev.h>
  20 #include <media/v4l2-chip-ident.h>
  21
  22 #define RJ54N1_DEV_CODE                 0x0400
  23 #define RJ54N1_DEV_CODE2                0x0401
  24 #define RJ54N1_OUT_SEL                  0x0403
  25 #define RJ54N1_XY_OUTPUT_SIZE_S_H       0x0404
  26 #define RJ54N1_X_OUTPUT_SIZE_S_L        0x0405
  27 #define RJ54N1_Y_OUTPUT_SIZE_S_L        0x0406
  28 #define RJ54N1_XY_OUTPUT_SIZE_P_H       0x0407
  29 #define RJ54N1_X_OUTPUT_SIZE_P_L        0x0408
  30 #define RJ54N1_Y_OUTPUT_SIZE_P_L        0x0409
  31 #define RJ54N1_LINE_LENGTH_PCK_S_H      0x040a
  32 #define RJ54N1_LINE_LENGTH_PCK_S_L      0x040b
  33 #define RJ54N1_LINE_LENGTH_PCK_P_H      0x040c
  34 #define RJ54N1_LINE_LENGTH_PCK_P_L      0x040d
  35 #define RJ54N1_RESIZE_N                 0x040e
  36 #define RJ54N1_RESIZE_N_STEP            0x040f
  37 #define RJ54N1_RESIZE_STEP              0x0410
  38 #define RJ54N1_RESIZE_HOLD_H            0x0411
  39 #define RJ54N1_RESIZE_HOLD_L            0x0412
  40 #define RJ54N1_H_OBEN_OFS               0x0413
  41 #define RJ54N1_V_OBEN_OFS               0x0414
  42 #define RJ54N1_RESIZE_CONTROL           0x0415
  43 #define RJ54N1_STILL_CONTROL            0x0417
  44 #define RJ54N1_INC_USE_SEL_H            0x0425
  45 #define RJ54N1_INC_USE_SEL_L            0x0426
  46 #define RJ54N1_MIRROR_STILL_MODE        0x0427
  47 #define RJ54N1_INIT_START               0x0428
  48 #define RJ54N1_SCALE_1_2_LEV            0x0429
  49 #define RJ54N1_SCALE_4_LEV              0x042a
  50 #define RJ54N1_Y_GAIN                   0x04d8
  51 #define RJ54N1_APT_GAIN_UP              0x04fa
  52 #define RJ54N1_RA_SEL_UL                0x0530
  53 #define RJ54N1_BYTE_SWAP                0x0531
  54 #define RJ54N1_OUT_SIGPO                0x053b
  55 #define RJ54N1_WB_SEL_WEIGHT_I          0x054e
  56 #define RJ54N1_BIT8_WB                  0x0569
  57 #define RJ54N1_HCAPS_WB                 0x056a
  58 #define RJ54N1_VCAPS_WB                 0x056b
  59 #define RJ54N1_HCAPE_WB                 0x056c
  60 #define RJ54N1_VCAPE_WB                 0x056d
  61 #define RJ54N1_EXPOSURE_CONTROL         0x058c
  62 #define RJ54N1_FRAME_LENGTH_S_H         0x0595
  63 #define RJ54N1_FRAME_LENGTH_S_L         0x0596
  64 #define RJ54N1_FRAME_LENGTH_P_H         0x0597
  65 #define RJ54N1_FRAME_LENGTH_P_L         0x0598
  66 #define RJ54N1_PEAK_H                   0x05b7
  67 #define RJ54N1_PEAK_50                  0x05b8
  68 #define RJ54N1_PEAK_60                  0x05b9
  69 #define RJ54N1_PEAK_DIFF                0x05ba
  70 #define RJ54N1_IOC                      0x05ef
  71 #define RJ54N1_TG_BYPASS                0x0700
  72 #define RJ54N1_PLL_L                    0x0701
  73 #define RJ54N1_PLL_N                    0x0702
  74 #define RJ54N1_PLL_EN                   0x0704
  75 #define RJ54N1_RATIO_TG                 0x0706
  76 #define RJ54N1_RATIO_T                  0x0707
  77 #define RJ54N1_RATIO_R                  0x0708
  78 #define RJ54N1_RAMP_TGCLK_EN            0x0709
  79 #define RJ54N1_OCLK_DSP                 0x0710
  80 #define RJ54N1_RATIO_OP                 0x0711
  81 #define RJ54N1_RATIO_O                  0x0712
  82 #define RJ54N1_OCLK_SEL_EN              0x0713
  83 #define RJ54N1_CLK_RST                  0x0717
  84 #define RJ54N1_RESET_STANDBY            0x0718
  85 #define RJ54N1_FWFLG                    0x07fe
  86
  87 #define E_EXCLK                         (1 << 7)
  88 #define SOFT_STDBY                      (1 << 4)
  89 #define SEN_RSTX                        (1 << 2)
  90 #define TG_RSTX                         (1 << 1)
  91 #define DSP_RSTX                        (1 << 0)
  92
  93 #define RESIZE_HOLD_SEL                 (1 << 2)
  94 #define RESIZE_GO                       (1 << 1)
  95
  96 /*
  97  * When cropping, the camera automatically centers the cropped region, there
  98  * doesn't seem to be a way to specify an explicit location of the rectangle.
  99  */
 100 #define RJ54N1_COLUMN_SKIP              0
 101 #define RJ54N1_ROW_SKIP                 0
 102 #define RJ54N1_MAX_WIDTH                1600
 103 #define RJ54N1_MAX_HEIGHT               1200
 104
 105 #define PLL_L                           2
 106 #define PLL_N                           0x31
 107
 108 /* I2C addresses: 0x50, 0x51, 0x60, 0x61 */
 109
 110 /* RJ54N1CB0C has only one fixed colorspace per pixelcode */
 111 struct rj54n1_datafmt {
 112         enum v4l2_mbus_pixelcode        code;
 113         enum v4l2_colorspace            colorspace;
 114 };
 115
 116 /* Find a data format by a pixel code in an array */
 117 static const struct rj54n1_datafmt *rj54n1_find_datafmt(
 118         enum v4l2_mbus_pixelcode code, const struct rj54n1_datafmt *fmt,
 119         int n)
 120 {
 121         int i;
 122         for (i = 0; i < n; i++)
 123                 if (fmt[i].code == code)
 124                         return fmt + i;
 125
 126         return NULL;
 127 }
 128
 129 static const struct rj54n1_datafmt rj54n1_colour_fmts[] = {
 130         {V4L2_MBUS_FMT_YUYV8_2X8, V4L2_COLORSPACE_JPEG},
 131         {V4L2_MBUS_FMT_YVYU8_2X8, V4L2_COLORSPACE_JPEG},
 132         {V4L2_MBUS_FMT_RGB565_2X8_LE, V4L2_COLORSPACE_SRGB},
 133         {V4L2_MBUS_FMT_RGB565_2X8_BE, V4L2_COLORSPACE_SRGB},
 134         {V4L2_MBUS_FMT_SBGGR10_2X8_PADHI_LE, V4L2_COLORSPACE_SRGB},
 135         {V4L2_MBUS_FMT_SBGGR10_2X8_PADLO_LE, V4L2_COLORSPACE_SRGB},
 136         {V4L2_MBUS_FMT_SBGGR10_2X8_PADHI_BE, V4L2_COLORSPACE_SRGB},
 137         {V4L2_MBUS_FMT_SBGGR10_2X8_PADLO_BE, V4L2_COLORSPACE_SRGB},
 138         {V4L2_MBUS_FMT_SBGGR10_1X10, V4L2_COLORSPACE_SRGB},
 139 };
 140
 141 struct rj54n1_clock_div {
 142         u8 ratio_tg;    /* can be 0 or an odd number */
 143         u8 ratio_t;
 144         u8 ratio_r;
 145         u8 ratio_op;
 146         u8 ratio_o;
 147 };
 148
 149 struct rj54n1 {
 150         struct v4l2_subdev subdev;
 151         struct rj54n1_clock_div clk_div;
 152         const struct rj54n1_datafmt *fmt;
 153         struct v4l2_rect rect;  /* Sensor window */
 154         unsigned int tgclk_mhz;
 155         bool auto_wb;
 156         unsigned short width;   /* Output window */
 157         unsigned short height;
 158         unsigned short resize;  /* Sensor * 1024 / resize = Output */
 159         unsigned short scale;
 160         u8 bank;
 161 };
 162
 163 struct rj54n1_reg_val {
 164         u16 reg;
 165         u8 val;
 166 };
 167
 168 static const struct rj54n1_reg_val bank_4[] = {
 169         {0x417, 0},
 170         {0x42c, 0},
 171         {0x42d, 0xf0},
 172         {0x42e, 0},
 173         {0x42f, 0x50},
 174         {0x430, 0xf5},
 175         {0x431, 0x16},
 176         {0x432, 0x20},
 177         {0x433, 0},
 178         {0x434, 0xc8},
 179         {0x43c, 8},
 180         {0x43e, 0x90},
 181         {0x445, 0x83},
 182         {0x4ba, 0x58},
 183         {0x4bb, 4},
 184         {0x4bc, 0x20},
 185         {0x4db, 4},
 186         {0x4fe, 2},
 187 };
 188
 189 static const struct rj54n1_reg_val bank_5[] = {
 190         {0x514, 0},
 191         {0x516, 0},
 192         {0x518, 0},
 193         {0x51a, 0},
 194         {0x51d, 0xff},
 195         {0x56f, 0x28},
 196         {0x575, 0x40},
 197         {0x5bc, 0x48},
 198         {0x5c1, 6},
 199         {0x5e5, 0x11},
 200         {0x5e6, 0x43},
 201         {0x5e7, 0x33},
 202         {0x5e8, 0x21},
 203         {0x5e9, 0x30},
 204         {0x5ea, 0x0},
 205         {0x5eb, 0xa5},
 206         {0x5ec, 0xff},
 207         {0x5fe, 2},
 208 };
 209
 210 static const struct rj54n1_reg_val bank_7[] = {
 211         {0x70a, 0},
 212         {0x714, 0xff},
 213         {0x715, 0xff},
 214         {0x716, 0x1f},
 215         {0x7FE, 2},
 216 };
 217
 218 static const struct rj54n1_reg_val bank_8[] = {
 219         {0x800, 0x00},
 220         {0x801, 0x01},
 221         {0x802, 0x61},
 222         {0x805, 0x00},
 223         {0x806, 0x00},
 224         {0x807, 0x00},
 225         {0x808, 0x00},
 226         {0x809, 0x01},
 227         {0x80A, 0x61},
 228         {0x80B, 0x00},
 229         {0x80C, 0x01},
 230         {0x80D, 0x00},
 231         {0x80E, 0x00},
 232         {0x80F, 0x00},
 233         {0x810, 0x00},
 234         {0x811, 0x01},
 235         {0x812, 0x61},
 236         {0x813, 0x00},
 237         {0x814, 0x11},
 238         {0x815, 0x00},
 239         {0x816, 0x41},
 240         {0x817, 0x00},
 241         {0x818, 0x51},
 242         {0x819, 0x01},
 243         {0x81A, 0x1F},
 244         {0x81B, 0x00},
 245         {0x81C, 0x01},
 246         {0x81D, 0x00},
 247         {0x81E, 0x11},
 248         {0x81F, 0x00},
 249         {0x820, 0x41},
 250         {0x821, 0x00},
 251         {0x822, 0x51},
 252         {0x823, 0x00},
 253         {0x824, 0x00},
 254         {0x825, 0x00},
 255         {0x826, 0x47},
 256         {0x827, 0x01},
 257         {0x828, 0x4F},
 258         {0x829, 0x00},
 259         {0x82A, 0x00},
 260         {0x82B, 0x00},
 261         {0x82C, 0x30},
 262         {0x82D, 0x00},
 263         {0x82E, 0x40},
 264         {0x82F, 0x00},
 265         {0x830, 0xB3},
 266         {0x831, 0x00},
 267         {0x832, 0xE3},
 268         {0x833, 0x00},
 269         {0x834, 0x00},
 270         {0x835, 0x00},
 271         {0x836, 0x00},
 272         {0x837, 0x00},
 273         {0x838, 0x00},
 274         {0x839, 0x01},
 275         {0x83A, 0x61},
 276         {0x83B, 0x00},
 277         {0x83C, 0x01},
 278         {0x83D, 0x00},
 279         {0x83E, 0x00},
 280         {0x83F, 0x00},
 281         {0x840, 0x00},
 282         {0x841, 0x01},
 283         {0x842, 0x61},
 284         {0x843, 0x00},
 285         {0x844, 0x1D},
 286         {0x845, 0x00},
 287         {0x846, 0x00},
 288         {0x847, 0x00},
 289         {0x848, 0x00},
 290         {0x849, 0x01},
 291         {0x84A, 0x1F},
 292         {0x84B, 0x00},
 293         {0x84C, 0x05},
 294         {0x84D, 0x00},
 295         {0x84E, 0x19},
 296         {0x84F, 0x01},
 297         {0x850, 0x21},
 298         {0x851, 0x01},
 299         {0x852, 0x5D},
 300         {0x853, 0x00},
 301         {0x854, 0x00},
 302         {0x855, 0x00},
 303         {0x856, 0x19},
 304         {0x857, 0x01},
 305         {0x858, 0x21},
 306         {0x859, 0x00},
 307         {0x85A, 0x00},
 308         {0x85B, 0x00},
 309         {0x85C, 0x00},
 310         {0x85D, 0x00},
 311         {0x85E, 0x00},
 312         {0x85F, 0x00},
 313         {0x860, 0xB3},
 314         {0x861, 0x00},
 315         {0x862, 0xE3},
 316         {0x863, 0x00},
 317         {0x864, 0x00},
 318         {0x865, 0x00},
 319         {0x866, 0x00},
 320         {0x867, 0x00},
 321         {0x868, 0x00},
 322         {0x869, 0xE2},
 323         {0x86A, 0x00},
 324         {0x86B, 0x01},
 325         {0x86C, 0x06},
 326         {0x86D, 0x00},
 327         {0x86E, 0x00},
 328         {0x86F, 0x00},
 329         {0x870, 0x60},
 330         {0x871, 0x8C},
 331         {0x872, 0x10},
 332         {0x873, 0x00},
 333         {0x874, 0xE0},
 334         {0x875, 0x00},
 335         {0x876, 0x27},
 336         {0x877, 0x01},
 337         {0x878, 0x00},
 338         {0x879, 0x00},
 339         {0x87A, 0x00},
 340         {0x87B, 0x03},
 341         {0x87C, 0x00},
 342         {0x87D, 0x00},
 343         {0x87E, 0x00},
 344         {0x87F, 0x00},
 345         {0x880, 0x00},
 346         {0x881, 0x00},
 347         {0x882, 0x00},
 348         {0x883, 0x00},
 349         {0x884, 0x00},
 350         {0x885, 0x00},
 351         {0x886, 0xF8},
 352         {0x887, 0x00},
 353         {0x888, 0x03},
 354         {0x889, 0x00},
 355         {0x88A, 0x64},
 356         {0x88B, 0x00},
 357         {0x88C, 0x03},
 358         {0x88D, 0x00},
 359         {0x88E, 0xB1},
 360         {0x88F, 0x00},
 361         {0x890, 0x03},
 362         {0x891, 0x01},
 363         {0x892, 0x1D},
 364         {0x893, 0x00},
 365         {0x894, 0x03},
 366         {0x895, 0x01},
 367         {0x896, 0x4B},
 368         {0x897, 0x00},
 369         {0x898, 0xE5},
 370         {0x899, 0x00},
 371         {0x89A, 0x01},
 372         {0x89B, 0x00},
 373         {0x89C, 0x01},
 374         {0x89D, 0x04},
 375         {0x89E, 0xC8},
 376         {0x89F, 0x00},
 377         {0x8A0, 0x01},
 378         {0x8A1, 0x01},
 379         {0x8A2, 0x61},
 380         {0x8A3, 0x00},
 381         {0x8A4, 0x01},
 382         {0x8A5, 0x00},
 383         {0x8A6, 0x00},
 384         {0x8A7, 0x00},
 385         {0x8A8, 0x00},
 386         {0x8A9, 0x00},
 387         {0x8AA, 0x7F},
 388         {0x8AB, 0x03},
 389         {0x8AC, 0x00},
 390         {0x8AD, 0x00},
 391         {0x8AE, 0x00},
 392         {0x8AF, 0x00},
 393         {0x8B0, 0x00},
 394         {0x8B1, 0x00},
 395         {0x8B6, 0x00},
 396         {0x8B7, 0x01},
 397         {0x8B8, 0x00},
 398         {0x8B9, 0x00},
 399         {0x8BA, 0x02},
 400         {0x8BB, 0x00},
 401         {0x8BC, 0xFF},
 402         {0x8BD, 0x00},
 403         {0x8FE, 2},
 404 };
 405
 406 static const struct rj54n1_reg_val bank_10[] = {
 407         {0x10bf, 0x69}
 408 };
 409
 410 /* Clock dividers - these are default register values, divider = register + 1 */
 411 static const struct rj54n1_clock_div clk_div = {
 412         .ratio_tg       = 3 /* default: 5 */,
 413         .ratio_t        = 4 /* default: 1 */,
 414         .ratio_r        = 4 /* default: 0 */,
 415         .ratio_op       = 1 /* default: 5 */,
 416         .ratio_o        = 9 /* default: 0 */,
 417 };
 418
 419 static struct rj54n1 *to_rj54n1(const struct i2c_client *client)
 420 {
 421         return container_of(i2c_get_clientdata(client), struct rj54n1, subdev);
 422 }
 423
 424 static int reg_read(struct i2c_client *client, const u16 reg)
 425 {
 426         struct rj54n1 *rj54n1 = to_rj54n1(client);
 427         int ret;
 428
 429         /* set bank */
 430         if (rj54n1->bank != reg >> 8) {
 431                 dev_dbg(&client->dev, "[0x%x] = 0x%x\n", 0xff, reg >> 8);
 432                 ret = i2c_smbus_write_byte_data(client, 0xff, reg >> 8);
 433                 if (ret < 0)
 434                         return ret;
 435                 rj54n1->bank = reg >> 8;
 436         }
 437         return i2c_smbus_read_byte_data(client, reg & 0xff);
 438 }
 439
 440 static int reg_write(struct i2c_client *client, const u16 reg,
 441                      const u8 data)
 442 {
 443         struct rj54n1 *rj54n1 = to_rj54n1(client);
 444         int ret;
 445
 446         /* set bank */
 447         if (rj54n1->bank != reg >> 8) {
 448                 dev_dbg(&client->dev, "[0x%x] = 0x%x\n", 0xff, reg >> 8);
 449                 ret = i2c_smbus_write_byte_data(client, 0xff, reg >> 8);
 450                 if (ret < 0)
 451                         return ret;
 452                 rj54n1->bank = reg >> 8;
 453         }
 454         dev_dbg(&client->dev, "[0x%x] = 0x%x\n", reg & 0xff, data);
 455         return i2c_smbus_write_byte_data(client, reg & 0xff, data);
 456 }
 457
 458 static int reg_set(struct i2c_client *client, const u16 reg,
 459                    const u8 data, const u8 mask)
 460 {
 461         int ret;
 462
 463         ret = reg_read(client, reg);
 464         if (ret < 0)
 465                 return ret;
 466         return reg_write(client, reg, (ret & ~mask) | (data & mask));
 467 }
 468
 469 static int reg_write_multiple(struct i2c_client *client,
 470                               const struct rj54n1_reg_val *rv, const int n)
 471 {
 472         int i, ret;
 473
 474         for (i = 0; i < n; i++) {
 475                 ret = reg_write(client, rv->reg, rv->val);
 476                 if (ret < 0)
 477                         return ret;
 478                 rv++;
 479         }
 480
 481         return 0;
 482 }
 483
 484 static int rj54n1_enum_fmt(struct v4l2_subdev *sd, unsigned int index,
 485                            enum v4l2_mbus_pixelcode *code)
 486 {
 487         if (index >= ARRAY_SIZE(rj54n1_colour_fmts))
 488                 return -EINVAL;
 489
 490         *code = rj54n1_colour_fmts[index].code;
 491         return 0;
 492 }
 493
 494 static int rj54n1_s_stream(struct v4l2_subdev *sd, int enable)
 495 {
 496         struct i2c_client *client = sd->priv;
 497
 498         /* Switch between preview and still shot modes */
 499         return reg_set(client, RJ54N1_STILL_CONTROL, (!enable) << 7, 0x80);
 500 }
 501
 502 static int rj54n1_set_bus_param(struct soc_camera_device *icd,
 503                                 unsigned long flags)
 504 {
 505         struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
 506         struct i2c_client *client = sd->priv;
 507         /* Figures 2.5-1 to 2.5-3 - default falling pixclk edge */
 508
 509         if (flags & SOCAM_PCLK_SAMPLE_RISING)
 510                 return reg_write(client, RJ54N1_OUT_SIGPO, 1 << 4);
 511         else
 512                 return reg_write(client, RJ54N1_OUT_SIGPO, 0);
 513 }
 514
 515 static unsigned long rj54n1_query_bus_param(struct soc_camera_device *icd)
 516 {
 517         struct soc_camera_link *icl = to_soc_camera_link(icd);
 518         const unsigned long flags =
 519                 SOCAM_PCLK_SAMPLE_RISING | SOCAM_PCLK_SAMPLE_FALLING |
 520                 SOCAM_MASTER | SOCAM_DATAWIDTH_8 |
 521                 SOCAM_HSYNC_ACTIVE_HIGH | SOCAM_VSYNC_ACTIVE_HIGH |
 522                 SOCAM_DATA_ACTIVE_HIGH;
 523
 524         return soc_camera_apply_sensor_flags(icl, flags);
 525 }
 526
 527 static int rj54n1_set_rect(struct i2c_client *client,
 528                            u16 reg_x, u16 reg_y, u16 reg_xy,
 529                            u32 width, u32 height)
 530 {
 531         int ret;
 532
 533         ret = reg_write(client, reg_xy,
 534                         ((width >> 4) & 0x70) |
 535                         ((height >> 8) & 7));
 536
 537         if (!ret)
 538                 ret = reg_write(client, reg_x, width & 0xff);
 539         if (!ret)
 540                 ret = reg_write(client, reg_y, height & 0xff);
 541
 542         return ret;
 543 }
 544
 545 /*
 546  * Some commands, specifically certain initialisation sequences, require
 547  * a commit operation.
 548  */
 549 static int rj54n1_commit(struct i2c_client *client)
 550 {
 551         int ret = reg_write(client, RJ54N1_INIT_START, 1);
 552         msleep(10);
 553         if (!ret)
 554                 ret = reg_write(client, RJ54N1_INIT_START, 0);
 555         return ret;
 556 }
 557
 558 static int rj54n1_sensor_scale(struct v4l2_subdev *sd, s32 *in_w, s32 *in_h,
 559                                s32 *out_w, s32 *out_h);
 560
 561 static int rj54n1_s_crop(struct v4l2_subdev *sd, struct v4l2_crop *a)
 562 {
 563         struct i2c_client *client = sd->priv;
 564         struct rj54n1 *rj54n1 = to_rj54n1(client);
 565         struct v4l2_rect *rect = &a->c;
 566         int dummy = 0, output_w, output_h,
 567                 input_w = rect->width, input_h = rect->height;
 568         int ret;
 569
 570         /* arbitrary minimum width and height, edges unimportant */
 571         soc_camera_limit_side(&dummy, &input_w,
 572                      RJ54N1_COLUMN_SKIP, 8, RJ54N1_MAX_WIDTH);
 573
 574         soc_camera_limit_side(&dummy, &input_h,
 575                      RJ54N1_ROW_SKIP, 8, RJ54N1_MAX_HEIGHT);
 576
 577         output_w = (input_w * 1024 + rj54n1->resize / 2) / rj54n1->resize;
 578         output_h = (input_h * 1024 + rj54n1->resize / 2) / rj54n1->resize;
 579
 580         dev_dbg(&client->dev, "Scaling for %dx%d : %u = %dx%d\n",
 581                 input_w, input_h, rj54n1->resize, output_w, output_h);
 582
 583         ret = rj54n1_sensor_scale(sd, &input_w, &input_h, &output_w, &output_h);
 584         if (ret < 0)
 585                 return ret;
 586
 587         rj54n1->width           = output_w;
 588         rj54n1->height          = output_h;
 589         rj54n1->resize          = ret;
 590         rj54n1->rect.width      = input_w;
 591         rj54n1->rect.height     = input_h;
 592
 593         return 0;
 594 }
 595
 596 static int rj54n1_g_crop(struct v4l2_subdev *sd, struct v4l2_crop *a)
 597 {
 598         struct i2c_client *client = sd->priv;
 599         struct rj54n1 *rj54n1 = to_rj54n1(client);
 600
 601         a->c    = rj54n1->rect;
 602         a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 603
 604         return 0;
 605 }
 606
 607 static int rj54n1_cropcap(struct v4l2_subdev *sd, struct v4l2_cropcap *a)
 608 {
 609         a->bounds.left                  = RJ54N1_COLUMN_SKIP;
 610         a->bounds.top                   = RJ54N1_ROW_SKIP;
 611         a->bounds.width                 = RJ54N1_MAX_WIDTH;
 612         a->bounds.height                = RJ54N1_MAX_HEIGHT;
 613         a->defrect                      = a->bounds;
 614         a->type                         = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 615         a->pixelaspect.numerator        = 1;
 616         a->pixelaspect.denominator      = 1;
 617
 618         return 0;
 619 }
 620
 621 static int rj54n1_g_fmt(struct v4l2_subdev *sd,
 622                         struct v4l2_mbus_framefmt *mf)
 623 {
 624         struct i2c_client *client = sd->priv;
 625         struct rj54n1 *rj54n1 = to_rj54n1(client);
 626
 627         mf->code        = rj54n1->fmt->code;
 628         mf->colorspace  = rj54n1->fmt->colorspace;
 629         mf->field       = V4L2_FIELD_NONE;
 630         mf->width       = rj54n1->width;
 631         mf->height      = rj54n1->height;
 632
 633         return 0;
 634 }
 635
 636 /*
 637  * The actual geometry configuration routine. It scales the input window into
 638  * the output one, updates the window sizes and returns an error or the resize
 639  * coefficient on success. Note: we only use the "Fixed Scaling" on this camera.
 640  */
 641 static int rj54n1_sensor_scale(struct v4l2_subdev *sd, s32 *in_w, s32 *in_h,
 642                                s32 *out_w, s32 *out_h)
 643 {
 644         struct i2c_client *client = sd->priv;
 645         struct rj54n1 *rj54n1 = to_rj54n1(client);
 646         unsigned int skip, resize, input_w = *in_w, input_h = *in_h,
 647                 output_w = *out_w, output_h = *out_h;
 648         u16 inc_sel, wb_bit8, wb_left, wb_right, wb_top, wb_bottom;
 649         unsigned int peak, peak_50, peak_60;
 650         int ret;
 651
 652         /*
 653          * We have a problem with crops, where the window is larger than 512x384
 654          * and output window is larger than a half of the input one. In this
 655          * case we have to either reduce the input window to equal or below
 656          * 512x384 or the output window to equal or below 1/2 of the input.
 657          */
 658         if (output_w > max(512U, input_w / 2)) {
 659                 if (2 * output_w > RJ54N1_MAX_WIDTH) {
 660                         input_w = RJ54N1_MAX_WIDTH;
 661                         output_w = RJ54N1_MAX_WIDTH / 2;
 662                 } else {
 663                         input_w = output_w * 2;
 664                 }
 665
 666                 dev_dbg(&client->dev, "Adjusted output width: in %u, out %u\n",
 667                         input_w, output_w);
 668         }
 669
 670         if (output_h > max(384U, input_h / 2)) {
 671                 if (2 * output_h > RJ54N1_MAX_HEIGHT) {
 672                         input_h = RJ54N1_MAX_HEIGHT;
 673                         output_h = RJ54N1_MAX_HEIGHT / 2;
 674                 } else {
 675                         input_h = output_h * 2;
 676                 }
 677
 678                 dev_dbg(&client->dev, "Adjusted output height: in %u, out %u\n",
 679                         input_h, output_h);
 680         }
 681
 682         /* Idea: use the read mode for snapshots, handle separate geometries */
 683         ret = rj54n1_set_rect(client, RJ54N1_X_OUTPUT_SIZE_S_L,
 684                               RJ54N1_Y_OUTPUT_SIZE_S_L,
 685                               RJ54N1_XY_OUTPUT_SIZE_S_H, output_w, output_h);
 686         if (!ret)
 687                 ret = rj54n1_set_rect(client, RJ54N1_X_OUTPUT_SIZE_P_L,
 688                               RJ54N1_Y_OUTPUT_SIZE_P_L,
 689                               RJ54N1_XY_OUTPUT_SIZE_P_H, output_w, output_h);
 690
 691         if (ret < 0)
 692                 return ret;
 693
 694         if (output_w > input_w && output_h > input_h) {
 695                 input_w = output_w;
 696                 input_h = output_h;
 697
 698                 resize = 1024;
 699         } else {
 700                 unsigned int resize_x, resize_y;
 701                 resize_x = (input_w * 1024 + output_w / 2) / output_w;
 702                 resize_y = (input_h * 1024 + output_h / 2) / output_h;
 703
 704                 /* We want max(resize_x, resize_y), check if it still fits */
 705                 if (resize_x > resize_y &&
 706                     (output_h * resize_x + 512) / 1024 > RJ54N1_MAX_HEIGHT)
 707                         resize = (RJ54N1_MAX_HEIGHT * 1024 + output_h / 2) /
 708                                 output_h;
 709                 else if (resize_y > resize_x &&
 710                          (output_w * resize_y + 512) / 1024 > RJ54N1_MAX_WIDTH)
 711                         resize = (RJ54N1_MAX_WIDTH * 1024 + output_w / 2) /
 712                                 output_w;
 713                 else
 714                         resize = max(resize_x, resize_y);
 715
 716                 /* Prohibited value ranges */
 717                 switch (resize) {
 718                 case 2040 ... 2047:
 719                         resize = 2039;
 720                         break;
 721                 case 4080 ... 4095:
 722                         resize = 4079;
 723                         break;
 724                 case 8160 ... 8191:
 725                         resize = 8159;
 726                         break;
 727                 case 16320 ... 16384:
 728                         resize = 16319;
 729                 }
 730         }
 731
 732         /* Set scaling */
 733         ret = reg_write(client, RJ54N1_RESIZE_HOLD_L, resize & 0xff);
 734         if (!ret)
 735                 ret = reg_write(client, RJ54N1_RESIZE_HOLD_H, resize >> 8);
 736
 737         if (ret < 0)
 738                 return ret;
 739
 740         /*
 741          * Configure a skipping bitmask. The sensor will select a skipping value
 742          * among set bits automatically. This is very unclear in the datasheet
 743          * too. I was told, in this register one enables all skipping values,
 744          * that are required for a specific resize, and the camera selects
 745          * automatically, which ones to use. But it is unclear how to identify,
 746          * which cropping values are needed. Secondly, why don't we just set all
 747          * bits and let the camera choose? Would it increase processing time and
 748          * reduce the framerate? Using 0xfffc for INC_USE_SEL doesn't seem to
 749          * improve the image quality or stability for larger frames (see comment
 750          * above), but I didn't check the framerate.
 751          */
 752         skip = min(resize / 1024, 15U);
 753
 754         inc_sel = 1 << skip;
 755
 756         if (inc_sel <= 2)
 757                 inc_sel = 0xc;
 758         else if (resize & 1023 && skip < 15)
 759                 inc_sel |= 1 << (skip + 1);
 760
 761         ret = reg_write(client, RJ54N1_INC_USE_SEL_L, inc_sel & 0xfc);
 762         if (!ret)
 763                 ret = reg_write(client, RJ54N1_INC_USE_SEL_H, inc_sel >> 8);
 764
 765         if (!rj54n1->auto_wb) {
 766                 /* Auto white balance window */
 767                 wb_left   = output_w / 16;
 768                 wb_right  = (3 * output_w / 4 - 3) / 4;
 769                 wb_top    = output_h / 16;
 770                 wb_bottom = (3 * output_h / 4 - 3) / 4;
 771                 wb_bit8   = ((wb_left >> 2) & 0x40) | ((wb_top >> 4) & 0x10) |
 772                         ((wb_right >> 6) & 4) | ((wb_bottom >> 8) & 1);
 773
 774                 if (!ret)
 775                         ret = reg_write(client, RJ54N1_BIT8_WB, wb_bit8);
 776                 if (!ret)
 777                         ret = reg_write(client, RJ54N1_HCAPS_WB, wb_left);
 778                 if (!ret)
 779                         ret = reg_write(client, RJ54N1_VCAPS_WB, wb_top);
 780                 if (!ret)
 781                         ret = reg_write(client, RJ54N1_HCAPE_WB, wb_right);
 782                 if (!ret)
 783                         ret = reg_write(client, RJ54N1_VCAPE_WB, wb_bottom);
 784         }
 785
 786         /* Antiflicker */
 787         peak = 12 * RJ54N1_MAX_WIDTH * (1 << 14) * resize / rj54n1->tgclk_mhz /
 788                 10000;
 789         peak_50 = peak / 6;
 790         peak_60 = peak / 5;
 791
 792         if (!ret)
 793                 ret = reg_write(client, RJ54N1_PEAK_H,
 794                                 ((peak_50 >> 4) & 0xf0) | (peak_60 >> 8));
 795         if (!ret)
 796                 ret = reg_write(client, RJ54N1_PEAK_50, peak_50);
 797         if (!ret)
 798                 ret = reg_write(client, RJ54N1_PEAK_60, peak_60);
 799         if (!ret)
 800                 ret = reg_write(client, RJ54N1_PEAK_DIFF, peak / 150);
 801
 802         /* Start resizing */
 803         if (!ret)
 804                 ret = reg_write(client, RJ54N1_RESIZE_CONTROL,
 805                                 RESIZE_HOLD_SEL | RESIZE_GO | 1);
 806
 807         if (ret < 0)
 808                 return ret;
 809
 810         /* Constant taken from manufacturer's example */
 811         msleep(230);
 812
 813         ret = reg_write(client, RJ54N1_RESIZE_CONTROL, RESIZE_HOLD_SEL | 1);
 814         if (ret < 0)
 815                 return ret;
 816
 817         *in_w = (output_w * resize + 512) / 1024;
 818         *in_h = (output_h * resize + 512) / 1024;
 819         *out_w = output_w;
 820         *out_h = output_h;
 821
 822         dev_dbg(&client->dev, "Scaled for %dx%d : %u = %ux%u, skip %u\n",
 823                 *in_w, *in_h, resize, output_w, output_h, skip);
 824
 825         return resize;
 826 }
 827
 828 static int rj54n1_set_clock(struct i2c_client *client)
 829 {
 830         struct rj54n1 *rj54n1 = to_rj54n1(client);
 831         int ret;
 832
 833         /* Enable external clock */
 834         ret = reg_write(client, RJ54N1_RESET_STANDBY, E_EXCLK | SOFT_STDBY);
 835         /* Leave stand-by. Note: use this when implementing suspend / resume */
 836         if (!ret)
 837                 ret = reg_write(client, RJ54N1_RESET_STANDBY, E_EXCLK);
 838
 839         if (!ret)
 840                 ret = reg_write(client, RJ54N1_PLL_L, PLL_L);
 841         if (!ret)
 842                 ret = reg_write(client, RJ54N1_PLL_N, PLL_N);
 843
 844         /* TGCLK dividers */
 845         if (!ret)
 846                 ret = reg_write(client, RJ54N1_RATIO_TG,
 847                                 rj54n1->clk_div.ratio_tg);
 848         if (!ret)
 849                 ret = reg_write(client, RJ54N1_RATIO_T,
 850                                 rj54n1->clk_div.ratio_t);
 851         if (!ret)
 852                 ret = reg_write(client, RJ54N1_RATIO_R,
 853                                 rj54n1->clk_div.ratio_r);
 854
 855         /* Enable TGCLK & RAMP */
 856         if (!ret)
 857                 ret = reg_write(client, RJ54N1_RAMP_TGCLK_EN, 3);
 858
 859         /* Disable clock output */
 860         if (!ret)
 861                 ret = reg_write(client, RJ54N1_OCLK_DSP, 0);
 862
 863         /* Set divisors */
 864         if (!ret)
 865                 ret = reg_write(client, RJ54N1_RATIO_OP,
 866                                 rj54n1->clk_div.ratio_op);
 867         if (!ret)
 868                 ret = reg_write(client, RJ54N1_RATIO_O,
 869                                 rj54n1->clk_div.ratio_o);
 870
 871         /* Enable OCLK */
 872         if (!ret)
 873                 ret = reg_write(client, RJ54N1_OCLK_SEL_EN, 1);
 874
 875         /* Use PLL for Timing Generator, write 2 to reserved bits */
 876         if (!ret)
 877                 ret = reg_write(client, RJ54N1_TG_BYPASS, 2);
 878
 879         /* Take sensor out of reset */
 880         if (!ret)
 881                 ret = reg_write(client, RJ54N1_RESET_STANDBY,
 882                                 E_EXCLK | SEN_RSTX);
 883         /* Enable PLL */
 884         if (!ret)
 885                 ret = reg_write(client, RJ54N1_PLL_EN, 1);
 886
 887         /* Wait for PLL to stabilise */
 888         msleep(10);
 889
 890         /* Enable clock to frequency divider */
 891         if (!ret)
 892                 ret = reg_write(client, RJ54N1_CLK_RST, 1);
 893
 894         if (!ret)
 895                 ret = reg_read(client, RJ54N1_CLK_RST);
 896         if (ret != 1) {
 897                 dev_err(&client->dev,
 898                         "Resetting RJ54N1CB0C clock failed: %d!\n", ret);
 899                 return -EIO;
 900         }
 901
 902         /* Start the PLL */
 903         ret = reg_set(client, RJ54N1_OCLK_DSP, 1, 1);
 904
 905         /* Enable OCLK */
 906         if (!ret)
 907                 ret = reg_write(client, RJ54N1_OCLK_SEL_EN, 1);
 908
 909         return ret;
 910 }
 911
 912 static int rj54n1_reg_init(struct i2c_client *client)
 913 {
 914         struct rj54n1 *rj54n1 = to_rj54n1(client);
 915         int ret = rj54n1_set_clock(client);
 916
 917         if (!ret)
 918                 ret = reg_write_multiple(client, bank_7, ARRAY_SIZE(bank_7));
 919         if (!ret)
 920                 ret = reg_write_multiple(client, bank_10, ARRAY_SIZE(bank_10));
 921
 922         /* Set binning divisors */
 923         if (!ret)
 924                 ret = reg_write(client, RJ54N1_SCALE_1_2_LEV, 3 | (7 << 4));
 925         if (!ret)
 926                 ret = reg_write(client, RJ54N1_SCALE_4_LEV, 0xf);
 927
 928         /* Switch to fixed resize mode */
 929         if (!ret)
 930                 ret = reg_write(client, RJ54N1_RESIZE_CONTROL,
 931                                 RESIZE_HOLD_SEL | 1);
 932
 933         /* Set gain */
 934         if (!ret)
 935                 ret = reg_write(client, RJ54N1_Y_GAIN, 0x84);
 936
 937         /*
 938          * Mirror the image back: default is upside down and left-to-right...
 939          * Set manual preview / still shot switching
 940          */
 941         if (!ret)
 942                 ret = reg_write(client, RJ54N1_MIRROR_STILL_MODE, 0x27);
 943
 944         if (!ret)
 945                 ret = reg_write_multiple(client, bank_4, ARRAY_SIZE(bank_4));
 946
 947         /* Auto exposure area */
 948         if (!ret)
 949                 ret = reg_write(client, RJ54N1_EXPOSURE_CONTROL, 0x80);
 950         /* Check current auto WB config */
 951         if (!ret)
 952                 ret = reg_read(client, RJ54N1_WB_SEL_WEIGHT_I);
 953         if (ret >= 0) {
 954                 rj54n1->auto_wb = ret & 0x80;
 955                 ret = reg_write_multiple(client, bank_5, ARRAY_SIZE(bank_5));
 956         }
 957         if (!ret)
 958                 ret = reg_write_multiple(client, bank_8, ARRAY_SIZE(bank_8));
 959
 960         if (!ret)
 961                 ret = reg_write(client, RJ54N1_RESET_STANDBY,
 962                                 E_EXCLK | DSP_RSTX | SEN_RSTX);
 963
 964         /* Commit init */
 965         if (!ret)
 966                 ret = rj54n1_commit(client);
 967
 968         /* Take DSP, TG, sensor out of reset */
 969         if (!ret)
 970                 ret = reg_write(client, RJ54N1_RESET_STANDBY,
 971                                 E_EXCLK | DSP_RSTX | TG_RSTX | SEN_RSTX);
 972
 973         /* Start register update? Same register as 0x?FE in many bank_* sets */
 974         if (!ret)
 975                 ret = reg_write(client, RJ54N1_FWFLG, 2);
 976
 977         /* Constant taken from manufacturer's example */
 978         msleep(700);
 979
 980         return ret;
 981 }
 982
 983 static int rj54n1_try_fmt(struct v4l2_subdev *sd,
 984                           struct v4l2_mbus_framefmt *mf)
 985 {
 986         struct i2c_client *client = sd->priv;
 987         struct rj54n1 *rj54n1 = to_rj54n1(client);
 988         const struct rj54n1_datafmt *fmt;
 989         int align = mf->code == V4L2_MBUS_FMT_SBGGR10_1X10 ||
 990                 mf->code == V4L2_MBUS_FMT_SBGGR10_2X8_PADHI_BE ||
 991                 mf->code == V4L2_MBUS_FMT_SBGGR10_2X8_PADLO_BE ||
 992                 mf->code == V4L2_MBUS_FMT_SBGGR10_2X8_PADHI_LE ||
 993                 mf->code == V4L2_MBUS_FMT_SBGGR10_2X8_PADLO_LE;
 994
 995         dev_dbg(&client->dev, "%s: code = %d, width = %u, height = %u\n",
 996                 __func__, mf->code, mf->width, mf->height);
 997
 998         fmt = rj54n1_find_datafmt(mf->code, rj54n1_colour_fmts,
 999                                   ARRAY_SIZE(rj54n1_colour_fmts));
1000         if (!fmt) {
1001                 fmt = rj54n1->fmt;
1002                 mf->code = fmt->code;
1003         }
1004
1005         mf->field       = V4L2_FIELD_NONE;
1006         mf->colorspace  = fmt->colorspace;
1007
1008         v4l_bound_align_image(&mf->width, 112, RJ54N1_MAX_WIDTH, align,
1009                               &mf->height, 84, RJ54N1_MAX_HEIGHT, align, 0);
1010
1011         return 0;
1012 }
1013
1014 static int rj54n1_s_fmt(struct v4l2_subdev *sd,
1015                         struct v4l2_mbus_framefmt *mf)
1016 {
1017         struct i2c_client *client = sd->priv;
1018         struct rj54n1 *rj54n1 = to_rj54n1(client);
1019         const struct rj54n1_datafmt *fmt;
1020         int output_w, output_h, max_w, max_h,
1021                 input_w = rj54n1->rect.width, input_h = rj54n1->rect.height;
1022         int ret;
1023
1024         /*
1025          * The host driver can call us without .try_fmt(), so, we have to take
1026          * care ourseleves
1027          */
1028         rj54n1_try_fmt(sd, mf);
1029
1030         /*
1031          * Verify if the sensor has just been powered on. TODO: replace this
1032          * with proper PM, when a suitable API is available.
1033          */
1034         ret = reg_read(client, RJ54N1_RESET_STANDBY);
1035         if (ret < 0)
1036                 return ret;
1037
1038         if (!(ret & E_EXCLK)) {
1039                 ret = rj54n1_reg_init(client);
1040                 if (ret < 0)
1041                         return ret;
1042         }
1043
1044         dev_dbg(&client->dev, "%s: code = %d, width = %u, height = %u\n",
1045                 __func__, mf->code, mf->width, mf->height);
1046
1047         /* RA_SEL_UL is only relevant for raw modes, ignored otherwise. */
1048         switch (mf->code) {
1049         case V4L2_MBUS_FMT_YUYV8_2X8:
1050                 ret = reg_write(client, RJ54N1_OUT_SEL, 0);
1051                 if (!ret)
1052                         ret = reg_set(client, RJ54N1_BYTE_SWAP, 8, 8);
1053                 break;
1054         case V4L2_MBUS_FMT_YVYU8_2X8:
1055                 ret = reg_write(client, RJ54N1_OUT_SEL, 0);
1056                 if (!ret)
1057                         ret = reg_set(client, RJ54N1_BYTE_SWAP, 0, 8);
1058                 break;
1059         case V4L2_MBUS_FMT_RGB565_2X8_LE:
1060                 ret = reg_write(client, RJ54N1_OUT_SEL, 0x11);
1061                 if (!ret)
1062                         ret = reg_set(client, RJ54N1_BYTE_SWAP, 8, 8);
1063                 break;
1064         case V4L2_MBUS_FMT_RGB565_2X8_BE:
1065                 ret = reg_write(client, RJ54N1_OUT_SEL, 0x11);
1066                 if (!ret)
1067                         ret = reg_set(client, RJ54N1_BYTE_SWAP, 0, 8);
1068                 break;
1069         case V4L2_MBUS_FMT_SBGGR10_2X8_PADLO_LE:
1070                 ret = reg_write(client, RJ54N1_OUT_SEL, 4);
1071                 if (!ret)
1072                         ret = reg_set(client, RJ54N1_BYTE_SWAP, 8, 8);
1073                 if (!ret)
1074                         ret = reg_write(client, RJ54N1_RA_SEL_UL, 0);
1075                 break;
1076         case V4L2_MBUS_FMT_SBGGR10_2X8_PADHI_LE:
1077                 ret = reg_write(client, RJ54N1_OUT_SEL, 4);
1078                 if (!ret)
1079                         ret = reg_set(client, RJ54N1_BYTE_SWAP, 8, 8);
1080                 if (!ret)
1081                         ret = reg_write(client, RJ54N1_RA_SEL_UL, 8);
1082                 break;
1083         case V4L2_MBUS_FMT_SBGGR10_2X8_PADLO_BE:
1084                 ret = reg_write(client, RJ54N1_OUT_SEL, 4);
1085                 if (!ret)
1086                         ret = reg_set(client, RJ54N1_BYTE_SWAP, 0, 8);
1087                 if (!ret)
1088                         ret = reg_write(client, RJ54N1_RA_SEL_UL, 0);
1089                 break;
1090         case V4L2_MBUS_FMT_SBGGR10_2X8_PADHI_BE:
1091                 ret = reg_write(client, RJ54N1_OUT_SEL, 4);
1092                 if (!ret)
1093                         ret = reg_set(client, RJ54N1_BYTE_SWAP, 0, 8);
1094                 if (!ret)
1095                         ret = reg_write(client, RJ54N1_RA_SEL_UL, 8);
1096                 break;
1097         case V4L2_MBUS_FMT_SBGGR10_1X10:
1098                 ret = reg_write(client, RJ54N1_OUT_SEL, 5);
1099                 break;
1100         default:
1101                 ret = -EINVAL;
1102         }
1103
1104         /* Special case: a raw mode with 10 bits of data per clock tick */
1105         if (!ret)
1106                 ret = reg_set(client, RJ54N1_OCLK_SEL_EN,
1107                               (mf->code == V4L2_MBUS_FMT_SBGGR10_1X10) << 1, 2);
1108
1109         if (ret < 0)
1110                 return ret;
1111
1112         /* Supported scales 1:1 >= scale > 1:16 */
1113         max_w = mf->width * (16 * 1024 - 1) / 1024;
1114         if (input_w > max_w)
1115                 input_w = max_w;
1116         max_h = mf->height * (16 * 1024 - 1) / 1024;
1117         if (input_h > max_h)
1118                 input_h = max_h;
1119
1120         output_w = mf->width;
1121         output_h = mf->height;
1122
1123         ret = rj54n1_sensor_scale(sd, &input_w, &input_h, &output_w, &output_h);
1124         if (ret < 0)
1125                 return ret;
1126
1127         fmt = rj54n1_find_datafmt(mf->code, rj54n1_colour_fmts,
1128                                   ARRAY_SIZE(rj54n1_colour_fmts));
1129
1130         rj54n1->fmt             = fmt;
1131         rj54n1->resize          = ret;
1132         rj54n1->rect.width      = input_w;
1133         rj54n1->rect.height     = input_h;
1134         rj54n1->width           = output_w;
1135         rj54n1->height          = output_h;
1136
1137         mf->width               = output_w;
1138         mf->height              = output_h;
1139         mf->field               = V4L2_FIELD_NONE;
1140         mf->colorspace          = fmt->colorspace;
1141
1142         return 0;
1143 }
1144
1145 static int rj54n1_g_chip_ident(struct v4l2_subdev *sd,
1146                                struct v4l2_dbg_chip_ident *id)
1147 {
1148         struct i2c_client *client = sd->priv;
1149
1150         if (id->match.type != V4L2_CHIP_MATCH_I2C_ADDR)
1151                 return -EINVAL;
1152
1153         if (id->match.addr != client->addr)
1154                 return -ENODEV;
1155
1156         id->ident       = V4L2_IDENT_RJ54N1CB0C;
1157         id->revision    = 0;
1158
1159         return 0;
1160 }
1161
1162 #ifdef CONFIG_VIDEO_ADV_DEBUG
1163 static int rj54n1_g_register(struct v4l2_subdev *sd,
1164                              struct v4l2_dbg_register *reg)
1165 {
1166         struct i2c_client *client = sd->priv;
1167
1168         if (reg->match.type != V4L2_CHIP_MATCH_I2C_ADDR ||
1169             reg->reg < 0x400 || reg->reg > 0x1fff)
1170                 /* Registers > 0x0800 are only available from Sharp support */
1171                 return -EINVAL;
1172
1173         if (reg->match.addr != client->addr)
1174                 return -ENODEV;
1175
1176         reg->size = 1;
1177         reg->val = reg_read(client, reg->reg);
1178
1179         if (reg->val > 0xff)
1180                 return -EIO;
1181
1182         return 0;
1183 }
1184
1185 static int rj54n1_s_register(struct v4l2_subdev *sd,
1186                              struct v4l2_dbg_register *reg)
1187 {
1188         struct i2c_client *client = sd->priv;
1189
1190         if (reg->match.type != V4L2_CHIP_MATCH_I2C_ADDR ||
1191             reg->reg < 0x400 || reg->reg > 0x1fff)
1192                 /* Registers >= 0x0800 are only available from Sharp support */
1193                 return -EINVAL;
1194
1195         if (reg->match.addr != client->addr)
1196                 return -ENODEV;
1197
1198         if (reg_write(client, reg->reg, reg->val) < 0)
1199                 return -EIO;
1200
1201         return 0;
1202 }
1203 #endif
1204
1205 static const struct v4l2_queryctrl rj54n1_controls[] = {
1206         {
1207                 .id             = V4L2_CID_VFLIP,
1208                 .type           = V4L2_CTRL_TYPE_BOOLEAN,
1209                 .name           = "Flip Vertically",
1210                 .minimum        = 0,
1211                 .maximum        = 1,
1212                 .step           = 1,
1213                 .default_value  = 0,
1214         }, {
1215                 .id             = V4L2_CID_HFLIP,
1216                 .type           = V4L2_CTRL_TYPE_BOOLEAN,
1217                 .name           = "Flip Horizontally",
1218                 .minimum        = 0,
1219                 .maximum        = 1,
1220                 .step           = 1,
1221                 .default_value  = 0,
1222         }, {
1223                 .id             = V4L2_CID_GAIN,
1224                 .type           = V4L2_CTRL_TYPE_INTEGER,
1225                 .name           = "Gain",
1226                 .minimum        = 0,
1227                 .maximum        = 127,
1228                 .step           = 1,
1229                 .default_value  = 66,
1230                 .flags          = V4L2_CTRL_FLAG_SLIDER,
1231         }, {
1232                 .id             = V4L2_CID_AUTO_WHITE_BALANCE,
1233                 .type           = V4L2_CTRL_TYPE_BOOLEAN,
1234                 .name           = "Auto white balance",
1235                 .minimum        = 0,
1236                 .maximum        = 1,
1237                 .step           = 1,
1238                 .default_value  = 1,
1239         },
1240 };
1241
1242 static struct soc_camera_ops rj54n1_ops = {
1243         .set_bus_param          = rj54n1_set_bus_param,
1244         .query_bus_param        = rj54n1_query_bus_param,
1245         .controls               = rj54n1_controls,
1246         .num_controls           = ARRAY_SIZE(rj54n1_controls),
1247 };
1248
1249 static int rj54n1_g_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
1250 {
1251         struct i2c_client *client = sd->priv;
1252         struct rj54n1 *rj54n1 = to_rj54n1(client);
1253         int data;
1254
1255         switch (ctrl->id) {
1256         case V4L2_CID_VFLIP:
1257                 data = reg_read(client, RJ54N1_MIRROR_STILL_MODE);
1258                 if (data < 0)
1259                         return -EIO;
1260                 ctrl->value = !(data & 1);
1261                 break;
1262         case V4L2_CID_HFLIP:
1263                 data = reg_read(client, RJ54N1_MIRROR_STILL_MODE);
1264                 if (data < 0)
1265                         return -EIO;
1266                 ctrl->value = !(data & 2);
1267                 break;
1268         case V4L2_CID_GAIN:
1269                 data = reg_read(client, RJ54N1_Y_GAIN);
1270                 if (data < 0)
1271                         return -EIO;
1272
1273                 ctrl->value = data / 2;
1274                 break;
1275         case V4L2_CID_AUTO_WHITE_BALANCE:
1276                 ctrl->value = rj54n1->auto_wb;
1277                 break;
1278         }
1279
1280         return 0;
1281 }
1282
1283 static int rj54n1_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
1284 {
1285         int data;
1286         struct i2c_client *client = sd->priv;
1287         struct rj54n1 *rj54n1 = to_rj54n1(client);
1288         const struct v4l2_queryctrl *qctrl;
1289
1290         qctrl = soc_camera_find_qctrl(&rj54n1_ops, ctrl->id);
1291         if (!qctrl)
1292                 return -EINVAL;
1293
1294         switch (ctrl->id) {
1295         case V4L2_CID_VFLIP:
1296                 if (ctrl->value)
1297                         data = reg_set(client, RJ54N1_MIRROR_STILL_MODE, 0, 1);
1298                 else
1299                         data = reg_set(client, RJ54N1_MIRROR_STILL_MODE, 1, 1);
1300                 if (data < 0)
1301                         return -EIO;
1302                 break;
1303         case V4L2_CID_HFLIP:
1304                 if (ctrl->value)
1305                         data = reg_set(client, RJ54N1_MIRROR_STILL_MODE, 0, 2);
1306                 else
1307                         data = reg_set(client, RJ54N1_MIRROR_STILL_MODE, 2, 2);
1308                 if (data < 0)
1309                         return -EIO;
1310                 break;
1311         case V4L2_CID_GAIN:
1312                 if (ctrl->value > qctrl->maximum ||
1313                     ctrl->value < qctrl->minimum)
1314                         return -EINVAL;
1315                 else if (reg_write(client, RJ54N1_Y_GAIN, ctrl->value * 2) < 0)
1316                         return -EIO;
1317                 break;
1318         case V4L2_CID_AUTO_WHITE_BALANCE:
1319                 /* Auto WB area - whole image */
1320                 if (reg_set(client, RJ54N1_WB_SEL_WEIGHT_I, ctrl->value << 7,
1321                             0x80) < 0)
1322                         return -EIO;
1323                 rj54n1->auto_wb = ctrl->value;
1324                 break;
1325         }
1326
1327         return 0;
1328 }
1329
1330 static struct v4l2_subdev_core_ops rj54n1_subdev_core_ops = {
1331         .g_ctrl         = rj54n1_g_ctrl,
1332         .s_ctrl         = rj54n1_s_ctrl,
1333         .g_chip_ident   = rj54n1_g_chip_ident,
1334 #ifdef CONFIG_VIDEO_ADV_DEBUG
1335         .g_register     = rj54n1_g_register,
1336         .s_register     = rj54n1_s_register,
1337 #endif
1338 };
1339
1340 static struct v4l2_subdev_video_ops rj54n1_subdev_video_ops = {
1341         .s_stream       = rj54n1_s_stream,
1342         .s_mbus_fmt     = rj54n1_s_fmt,
1343         .g_mbus_fmt     = rj54n1_g_fmt,
1344         .try_mbus_fmt   = rj54n1_try_fmt,
1345         .enum_mbus_fmt  = rj54n1_enum_fmt,
1346         .g_crop         = rj54n1_g_crop,
1347         .s_crop         = rj54n1_s_crop,
1348         .cropcap        = rj54n1_cropcap,
1349 };
1350
1351 static struct v4l2_subdev_ops rj54n1_subdev_ops = {
1352         .core   = &rj54n1_subdev_core_ops,
1353         .video  = &rj54n1_subdev_video_ops,
1354 };
1355
1356 /*
1357  * Interface active, can use i2c. If it fails, it can indeed mean, that
1358  * this wasn't our capture interface, so, we wait for the right one
1359  */
1360 static int rj54n1_video_probe(struct soc_camera_device *icd,
1361                               struct i2c_client *client,
1362                               struct rj54n1_pdata *priv)
1363 {
1364         int data1, data2;
1365         int ret;
1366
1367         /* This could be a BUG_ON() or a WARN_ON(), or remove it completely */
1368         if (!icd->dev.parent ||
1369             to_soc_camera_host(icd->dev.parent)->nr != icd->iface)
1370                 return -ENODEV;
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         client->driver = NULL;
1464         kfree(rj54n1);
1465
1466         return 0;
1467 }
1468
1469 static const struct i2c_device_id rj54n1_id[] = {
1470         { "rj54n1cb0c", 0 },
1471         { }
1472 };
1473 MODULE_DEVICE_TABLE(i2c, rj54n1_id);
1474
1475 static struct i2c_driver rj54n1_i2c_driver = {
1476         .driver = {
1477                 .name = "rj54n1cb0c",
1478         },
1479         .probe          = rj54n1_probe,
1480         .remove         = rj54n1_remove,
1481         .id_table       = rj54n1_id,
1482 };
1483
1484 static int __init rj54n1_mod_init(void)
1485 {
1486         return i2c_add_driver(&rj54n1_i2c_driver);
1487 }
1488
1489 static void __exit rj54n1_mod_exit(void)
1490 {
1491         i2c_del_driver(&rj54n1_i2c_driver);
1492 }
1493
1494 module_init(rj54n1_mod_init);
1495 module_exit(rj54n1_mod_exit);
1496
1497 MODULE_DESCRIPTION("Sharp RJ54N1CB0C Camera driver");
1498 MODULE_AUTHOR("Guennadi Liakhovetski <g.liakhovetski@gmx.de>");
1499 MODULE_LICENSE("GPL v2");