linux/drivers/media/video/rj54n1cb0c.c
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   1/*
   2 * Driver for RJ54N1CB0C CMOS Image Sensor from Micron
   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 */
 111struct 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 */
 117static 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
 129static const struct rj54n1_datafmt rj54n1_colour_fmts[] = {
 130        {V4L2_MBUS_FMT_YUYV8_2X8_LE, V4L2_COLORSPACE_JPEG},
 131        {V4L2_MBUS_FMT_YVYU8_2X8_LE, 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
 141struct 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
 149struct 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
 163struct rj54n1_reg_val {
 164        u16 reg;
 165        u8 val;
 166};
 167
 168static 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
 189static 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
 210static const struct rj54n1_reg_val bank_7[] = {
 211        {0x70a, 0},
 212        {0x714, 0xff},
 213        {0x715, 0xff},
 214        {0x716, 0x1f},
 215        {0x7FE, 2},
 216};
 217
 218static 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
 406static const struct rj54n1_reg_val bank_10[] = {
 407        {0x10bf, 0x69}
 408};
 409
 410/* Clock dividers - these are default register values, divider = register + 1 */
 411static 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
 419static struct rj54n1 *to_rj54n1(const struct i2c_client *client)
 420{
 421        return container_of(i2c_get_clientdata(client), struct rj54n1, subdev);
 422}
 423
 424static 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
 440static 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
 458static 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
 469static 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
 484static 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
 494static 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
 502static 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
 515static 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
 527static 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 */
 549static 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
 558static int rj54n1_sensor_scale(struct v4l2_subdev *sd, s32 *in_w, s32 *in_h,
 559                               s32 *out_w, s32 *out_h);
 560
 561static 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
 596static 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
 607static 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
 621static 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 */
 641static 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
 828static 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
 912static 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
 983static 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
1014static 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_LE:
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_LE:
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
1145static 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
1163static 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
1185static 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
1205static 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
1242static 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
1249static 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
1283static 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
1330static 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
1340static 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
1351static 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 */
1360static 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
1391ei2c:
1392        return ret;
1393}
1394
1395static 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
1454static 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
1469static const struct i2c_device_id rj54n1_id[] = {
1470        { "rj54n1cb0c", 0 },
1471        { }
1472};
1473MODULE_DEVICE_TABLE(i2c, rj54n1_id);
1474
1475static 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
1484static int __init rj54n1_mod_init(void)
1485{
1486        return i2c_add_driver(&rj54n1_i2c_driver);
1487}
1488
1489static void __exit rj54n1_mod_exit(void)
1490{
1491        i2c_del_driver(&rj54n1_i2c_driver);
1492}
1493
1494module_init(rj54n1_mod_init);
1495module_exit(rj54n1_mod_exit);
1496
1497MODULE_DESCRIPTION("Sharp RJ54N1CB0C Camera driver");
1498MODULE_AUTHOR("Guennadi Liakhovetski <g.liakhovetski@gmx.de>");
1499MODULE_LICENSE("GPL v2");
1500