drivers/media/video/sr030pc30.c

   1 /*
   2  * Driver for SiliconFile SR030PC30 VGA (1/10-Inch) Image Sensor with ISP
   3  *
   4  * Copyright (C) 2010 Samsung Electronics Co., Ltd
   5  * Author: Sylwester Nawrocki, s.nawrocki@samsung.com
   6  *
   7  * Based on original driver authored by Dongsoo Nathaniel Kim
   8  * and HeungJun Kim <riverful.kim@samsung.com>.
   9  *
  10  * Based on mt9v011 Micron Digital Image Sensor driver
  11  * Copyright (c) 2009 Mauro Carvalho Chehab (mchehab@redhat.com)
  12  *
  13  * This program is free software; you can redistribute it and/or modify
  14  * it under the terms of the GNU General Public License as published by
  15  * the Free Software Foundation; either version 2 of the License, or
  16  * (at your option) any later version.
  17  */
  18
  19 #include <linux/i2c.h>
  20 #include <linux/delay.h>
  21 #include <linux/slab.h>
  22 #include <media/v4l2-device.h>
  23 #include <media/v4l2-subdev.h>
  24 #include <media/v4l2-mediabus.h>
  25 #include <media/sr030pc30.h>
  26
  27 static int debug;
  28 module_param(debug, int, 0644);
  29
  30 #define MODULE_NAME     "SR030PC30"
  31
  32 /*
  33  * Register offsets within a page
  34  * b15..b8 - page id, b7..b0 - register address
  35  */
  36 #define POWER_CTRL_REG          0x0001
  37 #define PAGEMODE_REG            0x03
  38 #define DEVICE_ID_REG           0x0004
  39 #define NOON010PC30_ID          0x86
  40 #define SR030PC30_ID            0x8C
  41 #define VDO_CTL1_REG            0x0010
  42 #define SUBSAMPL_NONE_VGA       0
  43 #define SUBSAMPL_QVGA           0x10
  44 #define SUBSAMPL_QQVGA          0x20
  45 #define VDO_CTL2_REG            0x0011
  46 #define SYNC_CTL_REG            0x0012
  47 #define WIN_ROWH_REG            0x0020
  48 #define WIN_ROWL_REG            0x0021
  49 #define WIN_COLH_REG            0x0022
  50 #define WIN_COLL_REG            0x0023
  51 #define WIN_HEIGHTH_REG         0x0024
  52 #define WIN_HEIGHTL_REG         0x0025
  53 #define WIN_WIDTHH_REG          0x0026
  54 #define WIN_WIDTHL_REG          0x0027
  55 #define HBLANKH_REG             0x0040
  56 #define HBLANKL_REG             0x0041
  57 #define VSYNCH_REG              0x0042
  58 #define VSYNCL_REG              0x0043
  59 /* page 10 */
  60 #define ISP_CTL_REG(n)          (0x1010 + (n))
  61 #define YOFS_REG                0x1040
  62 #define DARK_YOFS_REG           0x1041
  63 #define AG_ABRTH_REG            0x1050
  64 #define SAT_CTL_REG             0x1060
  65 #define BSAT_REG                0x1061
  66 #define RSAT_REG                0x1062
  67 #define AG_SAT_TH_REG           0x1063
  68 /* page 11 */
  69 #define ZLPF_CTRL_REG           0x1110
  70 #define ZLPF_CTRL2_REG          0x1112
  71 #define ZLPF_AGH_THR_REG        0x1121
  72 #define ZLPF_THR_REG            0x1160
  73 #define ZLPF_DYN_THR_REG        0x1160
  74 /* page 12 */
  75 #define YCLPF_CTL1_REG          0x1240
  76 #define YCLPF_CTL2_REG          0x1241
  77 #define YCLPF_THR_REG           0x1250
  78 #define BLPF_CTL_REG            0x1270
  79 #define BLPF_THR1_REG           0x1274
  80 #define BLPF_THR2_REG           0x1275
  81 /* page 14 - Lens Shading Compensation */
  82 #define LENS_CTRL_REG           0x1410
  83 #define LENS_XCEN_REG           0x1420
  84 #define LENS_YCEN_REG           0x1421
  85 #define LENS_R_COMP_REG         0x1422
  86 #define LENS_G_COMP_REG         0x1423
  87 #define LENS_B_COMP_REG         0x1424
  88 /* page 15 - Color correction */
  89 #define CMC_CTL_REG             0x1510
  90 #define CMC_OFSGH_REG           0x1514
  91 #define CMC_OFSGL_REG           0x1516
  92 #define CMC_SIGN_REG            0x1517
  93 /* Color correction coefficients */
  94 #define CMC_COEF_REG(n)         (0x1530 + (n))
  95 /* Color correction offset coefficients */
  96 #define CMC_OFS_REG(n)          (0x1540 + (n))
  97 /* page 16 - Gamma correction */
  98 #define GMA_CTL_REG             0x1610
  99 /* Gamma correction coefficients 0.14 */
 100 #define GMA_COEF_REG(n)         (0x1630 + (n))
 101 /* page 20 - Auto Exposure */
 102 #define AE_CTL1_REG             0x2010
 103 #define AE_CTL2_REG             0x2011
 104 #define AE_FRM_CTL_REG          0x2020
 105 #define AE_FINE_CTL_REG(n)      (0x2028 + (n))
 106 #define EXP_TIMEH_REG           0x2083
 107 #define EXP_TIMEM_REG           0x2084
 108 #define EXP_TIMEL_REG           0x2085
 109 #define EXP_MMINH_REG           0x2086
 110 #define EXP_MMINL_REG           0x2087
 111 #define EXP_MMAXH_REG           0x2088
 112 #define EXP_MMAXM_REG           0x2089
 113 #define EXP_MMAXL_REG           0x208A
 114 /* page 22 - Auto White Balance */
 115 #define AWB_CTL1_REG            0x2210
 116 #define AWB_ENABLE              0x80
 117 #define AWB_CTL2_REG            0x2211
 118 #define MWB_ENABLE              0x01
 119 /* RGB gain control (manual WB) when AWB_CTL1[7]=0 */
 120 #define AWB_RGAIN_REG           0x2280
 121 #define AWB_GGAIN_REG           0x2281
 122 #define AWB_BGAIN_REG           0x2282
 123 #define AWB_RMAX_REG            0x2283
 124 #define AWB_RMIN_REG            0x2284
 125 #define AWB_BMAX_REG            0x2285
 126 #define AWB_BMIN_REG            0x2286
 127 /* R, B gain range in bright light conditions */
 128 #define AWB_RMAXB_REG           0x2287
 129 #define AWB_RMINB_REG           0x2288
 130 #define AWB_BMAXB_REG           0x2289
 131 #define AWB_BMINB_REG           0x228A
 132 /* manual white balance, when AWB_CTL2[0]=1 */
 133 #define MWB_RGAIN_REG           0x22B2
 134 #define MWB_BGAIN_REG           0x22B3
 135 /* the token to mark an array end */
 136 #define REG_TERM                0xFFFF
 137
 138 /* Minimum and maximum exposure time in ms */
 139 #define EXPOS_MIN_MS            1
 140 #define EXPOS_MAX_MS            125
 141
 142 struct sr030pc30_info {
 143         struct v4l2_subdev sd;
 144         const struct sr030pc30_platform_data *pdata;
 145         const struct sr030pc30_format *curr_fmt;
 146         const struct sr030pc30_frmsize *curr_win;
 147         unsigned int auto_wb:1;
 148         unsigned int auto_exp:1;
 149         unsigned int hflip:1;
 150         unsigned int vflip:1;
 151         unsigned int sleep:1;
 152         unsigned int exposure;
 153         u8 blue_balance;
 154         u8 red_balance;
 155         u8 i2c_reg_page;
 156 };
 157
 158 struct sr030pc30_format {
 159         enum v4l2_mbus_pixelcode code;
 160         enum v4l2_colorspace colorspace;
 161         u16 ispctl1_reg;
 162 };
 163
 164 struct sr030pc30_frmsize {
 165         u16 width;
 166         u16 height;
 167         int vid_ctl1;
 168 };
 169
 170 struct i2c_regval {
 171         u16 addr;
 172         u16 val;
 173 };
 174
 175 static const struct v4l2_queryctrl sr030pc30_ctrl[] = {
 176         {
 177                 .id             = V4L2_CID_AUTO_WHITE_BALANCE,
 178                 .type           = V4L2_CTRL_TYPE_BOOLEAN,
 179                 .name           = "Auto White Balance",
 180                 .minimum        = 0,
 181                 .maximum        = 1,
 182                 .step           = 1,
 183                 .default_value  = 1,
 184         }, {
 185                 .id             = V4L2_CID_RED_BALANCE,
 186                 .type           = V4L2_CTRL_TYPE_INTEGER,
 187                 .name           = "Red Balance",
 188                 .minimum        = 0,
 189                 .maximum        = 127,
 190                 .step           = 1,
 191                 .default_value  = 64,
 192                 .flags          = 0,
 193         }, {
 194                 .id             = V4L2_CID_BLUE_BALANCE,
 195                 .type           = V4L2_CTRL_TYPE_INTEGER,
 196                 .name           = "Blue Balance",
 197                 .minimum        = 0,
 198                 .maximum        = 127,
 199                 .step           = 1,
 200                 .default_value  = 64,
 201         }, {
 202                 .id             = V4L2_CID_EXPOSURE_AUTO,
 203                 .type           = V4L2_CTRL_TYPE_INTEGER,
 204                 .name           = "Auto Exposure",
 205                 .minimum        = 0,
 206                 .maximum        = 1,
 207                 .step           = 1,
 208                 .default_value  = 1,
 209         }, {
 210                 .id             = V4L2_CID_EXPOSURE,
 211                 .type           = V4L2_CTRL_TYPE_INTEGER,
 212                 .name           = "Exposure",
 213                 .minimum        = EXPOS_MIN_MS,
 214                 .maximum        = EXPOS_MAX_MS,
 215                 .step           = 1,
 216                 .default_value  = 1,
 217         }, {
 218         }
 219 };
 220
 221 /* supported resolutions */
 222 static const struct sr030pc30_frmsize sr030pc30_sizes[] = {
 223         {
 224                 .width          = 640,
 225                 .height         = 480,
 226                 .vid_ctl1       = SUBSAMPL_NONE_VGA,
 227         }, {
 228                 .width          = 320,
 229                 .height         = 240,
 230                 .vid_ctl1       = SUBSAMPL_QVGA,
 231         }, {
 232                 .width          = 160,
 233                 .height         = 120,
 234                 .vid_ctl1       = SUBSAMPL_QQVGA,
 235         },
 236 };
 237
 238 /* supported pixel formats */
 239 static const struct sr030pc30_format sr030pc30_formats[] = {
 240         {
 241                 .code           = V4L2_MBUS_FMT_YUYV8_2X8,
 242                 .colorspace     = V4L2_COLORSPACE_JPEG,
 243                 .ispctl1_reg    = 0x03,
 244         }, {
 245                 .code           = V4L2_MBUS_FMT_YVYU8_2X8,
 246                 .colorspace     = V4L2_COLORSPACE_JPEG,
 247                 .ispctl1_reg    = 0x02,
 248         }, {
 249                 .code           = V4L2_MBUS_FMT_VYUY8_2X8,
 250                 .colorspace     = V4L2_COLORSPACE_JPEG,
 251                 .ispctl1_reg    = 0,
 252         }, {
 253                 .code           = V4L2_MBUS_FMT_UYVY8_2X8,
 254                 .colorspace     = V4L2_COLORSPACE_JPEG,
 255                 .ispctl1_reg    = 0x01,
 256         }, {
 257                 .code           = V4L2_MBUS_FMT_RGB565_2X8_BE,
 258                 .colorspace     = V4L2_COLORSPACE_JPEG,
 259                 .ispctl1_reg    = 0x40,
 260         },
 261 };
 262
 263 static const struct i2c_regval sr030pc30_base_regs[] = {
 264         /* Window size and position within pixel matrix */
 265         { WIN_ROWH_REG,         0x00 }, { WIN_ROWL_REG,         0x06 },
 266         { WIN_COLH_REG,         0x00 }, { WIN_COLL_REG,         0x06 },
 267         { WIN_HEIGHTH_REG,      0x01 }, { WIN_HEIGHTL_REG,      0xE0 },
 268         { WIN_WIDTHH_REG,       0x02 }, { WIN_WIDTHL_REG,       0x80 },
 269         { HBLANKH_REG,          0x01 }, { HBLANKL_REG,          0x50 },
 270         { VSYNCH_REG,           0x00 }, { VSYNCL_REG,           0x14 },
 271         { SYNC_CTL_REG,         0 },
 272         /* Color corection and saturation */
 273         { ISP_CTL_REG(0),       0x30 }, { YOFS_REG,             0x80 },
 274         { DARK_YOFS_REG,        0x04 }, { AG_ABRTH_REG,         0x78 },
 275         { SAT_CTL_REG,          0x1F }, { BSAT_REG,             0x90 },
 276         { AG_SAT_TH_REG,        0xF0 }, { 0x1064,               0x80 },
 277         { CMC_CTL_REG,          0x03 }, { CMC_OFSGH_REG,        0x3C },
 278         { CMC_OFSGL_REG,        0x2C }, { CMC_SIGN_REG,         0x2F },
 279         { CMC_COEF_REG(0),      0xCB }, { CMC_OFS_REG(0),       0x87 },
 280         { CMC_COEF_REG(1),      0x61 }, { CMC_OFS_REG(1),       0x18 },
 281         { CMC_COEF_REG(2),      0x16 }, { CMC_OFS_REG(2),       0x91 },
 282         { CMC_COEF_REG(3),      0x23 }, { CMC_OFS_REG(3),       0x94 },
 283         { CMC_COEF_REG(4),      0xCE }, { CMC_OFS_REG(4),       0x9f },
 284         { CMC_COEF_REG(5),      0x2B }, { CMC_OFS_REG(5),       0x33 },
 285         { CMC_COEF_REG(6),      0x01 }, { CMC_OFS_REG(6),       0x00 },
 286         { CMC_COEF_REG(7),      0x34 }, { CMC_OFS_REG(7),       0x94 },
 287         { CMC_COEF_REG(8),      0x75 }, { CMC_OFS_REG(8),       0x14 },
 288         /* Color corection coefficients */
 289         { GMA_CTL_REG,          0x03 }, { GMA_COEF_REG(0),      0x00 },
 290         { GMA_COEF_REG(1),      0x19 }, { GMA_COEF_REG(2),      0x26 },
 291         { GMA_COEF_REG(3),      0x3B }, { GMA_COEF_REG(4),      0x5D },
 292         { GMA_COEF_REG(5),      0x79 }, { GMA_COEF_REG(6),      0x8E },
 293         { GMA_COEF_REG(7),      0x9F }, { GMA_COEF_REG(8),      0xAF },
 294         { GMA_COEF_REG(9),      0xBD }, { GMA_COEF_REG(10),     0xCA },
 295         { GMA_COEF_REG(11),     0xDD }, { GMA_COEF_REG(12),     0xEC },
 296         { GMA_COEF_REG(13),     0xF7 }, { GMA_COEF_REG(14),     0xFF },
 297         /* Noise reduction, Z-LPF, YC-LPF and BLPF filters setup */
 298         { ZLPF_CTRL_REG,        0x99 }, { ZLPF_CTRL2_REG,       0x0E },
 299         { ZLPF_AGH_THR_REG,     0x29 }, { ZLPF_THR_REG,         0x0F },
 300         { ZLPF_DYN_THR_REG,     0x63 }, { YCLPF_CTL1_REG,       0x23 },
 301         { YCLPF_CTL2_REG,       0x3B }, { YCLPF_THR_REG,        0x05 },
 302         { BLPF_CTL_REG,         0x1D }, { BLPF_THR1_REG,        0x05 },
 303         { BLPF_THR2_REG,        0x04 },
 304         /* Automatic white balance */
 305         { AWB_CTL1_REG,         0xFB }, { AWB_CTL2_REG,         0x26 },
 306         { AWB_RMAX_REG,         0x54 }, { AWB_RMIN_REG,         0x2B },
 307         { AWB_BMAX_REG,         0x57 }, { AWB_BMIN_REG,         0x29 },
 308         { AWB_RMAXB_REG,        0x50 }, { AWB_RMINB_REG,        0x43 },
 309         { AWB_BMAXB_REG,        0x30 }, { AWB_BMINB_REG,        0x22 },
 310         /* Auto exposure */
 311         { AE_CTL1_REG,          0x8C }, { AE_CTL2_REG,          0x04 },
 312         { AE_FRM_CTL_REG,       0x01 }, { AE_FINE_CTL_REG(0),   0x3F },
 313         { AE_FINE_CTL_REG(1),   0xA3 }, { AE_FINE_CTL_REG(3),   0x34 },
 314         /* Lens shading compensation */
 315         { LENS_CTRL_REG,        0x01 }, { LENS_XCEN_REG,        0x80 },
 316         { LENS_YCEN_REG,        0x70 }, { LENS_R_COMP_REG,      0x53 },
 317         { LENS_G_COMP_REG,      0x40 }, { LENS_B_COMP_REG,      0x3e },
 318         { REG_TERM,             0 },
 319 };
 320
 321 static inline struct sr030pc30_info *to_sr030pc30(struct v4l2_subdev *sd)
 322 {
 323         return container_of(sd, struct sr030pc30_info, sd);
 324 }
 325
 326 static inline int set_i2c_page(struct sr030pc30_info *info,
 327                                struct i2c_client *client, unsigned int reg)
 328 {
 329         int ret = 0;
 330         u32 page = reg >> 8 & 0xFF;
 331
 332         if (info->i2c_reg_page != page && (reg & 0xFF) != 0x03) {
 333                 ret = i2c_smbus_write_byte_data(client, PAGEMODE_REG, page);
 334                 if (!ret)
 335                         info->i2c_reg_page = page;
 336         }
 337         return ret;
 338 }
 339
 340 static int cam_i2c_read(struct v4l2_subdev *sd, u32 reg_addr)
 341 {
 342         struct i2c_client *client = v4l2_get_subdevdata(sd);
 343         struct sr030pc30_info *info = to_sr030pc30(sd);
 344
 345         int ret = set_i2c_page(info, client, reg_addr);
 346         if (!ret)
 347                 ret = i2c_smbus_read_byte_data(client, reg_addr & 0xFF);
 348         return ret;
 349 }
 350
 351 static int cam_i2c_write(struct v4l2_subdev *sd, u32 reg_addr, u32 val)
 352 {
 353         struct i2c_client *client = v4l2_get_subdevdata(sd);
 354         struct sr030pc30_info *info = to_sr030pc30(sd);
 355
 356         int ret = set_i2c_page(info, client, reg_addr);
 357         if (!ret)
 358                 ret = i2c_smbus_write_byte_data(
 359                         client, reg_addr & 0xFF, val);
 360         return ret;
 361 }
 362
 363 static inline int sr030pc30_bulk_write_reg(struct v4l2_subdev *sd,
 364                                 const struct i2c_regval *msg)
 365 {
 366         while (msg->addr != REG_TERM) {
 367                 int ret = cam_i2c_write(sd, msg->addr, msg->val);
 368                 if (ret)
 369                         return ret;
 370                 msg++;
 371         }
 372         return 0;
 373 }
 374
 375 /* Device reset and sleep mode control */
 376 static int sr030pc30_pwr_ctrl(struct v4l2_subdev *sd,
 377                                      bool reset, bool sleep)
 378 {
 379         struct sr030pc30_info *info = to_sr030pc30(sd);
 380         u8 reg = sleep ? 0xF1 : 0xF0;
 381         int ret = 0;
 382
 383         if (reset)
 384                 ret = cam_i2c_write(sd, POWER_CTRL_REG, reg | 0x02);
 385         if (!ret) {
 386                 ret = cam_i2c_write(sd, POWER_CTRL_REG, reg);
 387                 if (!ret) {
 388                         info->sleep = sleep;
 389                         if (reset)
 390                                 info->i2c_reg_page = -1;
 391                 }
 392         }
 393         return ret;
 394 }
 395
 396 static inline int sr030pc30_enable_autoexposure(struct v4l2_subdev *sd, int on)
 397 {
 398         struct sr030pc30_info *info = to_sr030pc30(sd);
 399         /* auto anti-flicker is also enabled here */
 400         int ret = cam_i2c_write(sd, AE_CTL1_REG, on ? 0xDC : 0x0C);
 401         if (!ret)
 402                 info->auto_exp = on;
 403         return ret;
 404 }
 405
 406 static int sr030pc30_set_exposure(struct v4l2_subdev *sd, int value)
 407 {
 408         struct sr030pc30_info *info = to_sr030pc30(sd);
 409
 410         unsigned long expos = value * info->pdata->clk_rate / (8 * 1000);
 411
 412         int ret = cam_i2c_write(sd, EXP_TIMEH_REG, expos >> 16 & 0xFF);
 413         if (!ret)
 414                 ret = cam_i2c_write(sd, EXP_TIMEM_REG, expos >> 8 & 0xFF);
 415         if (!ret)
 416                 ret = cam_i2c_write(sd, EXP_TIMEL_REG, expos & 0xFF);
 417         if (!ret) { /* Turn off AE */
 418                 info->exposure = value;
 419                 ret = sr030pc30_enable_autoexposure(sd, 0);
 420         }
 421         return ret;
 422 }
 423
 424 /* Automatic white balance control */
 425 static int sr030pc30_enable_autowhitebalance(struct v4l2_subdev *sd, int on)
 426 {
 427         struct sr030pc30_info *info = to_sr030pc30(sd);
 428
 429         int ret = cam_i2c_write(sd, AWB_CTL2_REG, on ? 0x2E : 0x2F);
 430         if (!ret)
 431                 ret = cam_i2c_write(sd, AWB_CTL1_REG, on ? 0xFB : 0x7B);
 432         if (!ret)
 433                 info->auto_wb = on;
 434
 435         return ret;
 436 }
 437
 438 static int sr030pc30_set_flip(struct v4l2_subdev *sd)
 439 {
 440         struct sr030pc30_info *info = to_sr030pc30(sd);
 441
 442         s32 reg = cam_i2c_read(sd, VDO_CTL2_REG);
 443         if (reg < 0)
 444                 return reg;
 445
 446         reg &= 0x7C;
 447         if (info->hflip)
 448                 reg |= 0x01;
 449         if (info->vflip)
 450                 reg |= 0x02;
 451         return cam_i2c_write(sd, VDO_CTL2_REG, reg | 0x80);
 452 }
 453
 454 /* Configure resolution, color format and image flip */
 455 static int sr030pc30_set_params(struct v4l2_subdev *sd)
 456 {
 457         struct sr030pc30_info *info = to_sr030pc30(sd);
 458         int ret;
 459
 460         if (!info->curr_win)
 461                 return -EINVAL;
 462
 463         /* Configure the resolution through subsampling */
 464         ret = cam_i2c_write(sd, VDO_CTL1_REG,
 465                             info->curr_win->vid_ctl1);
 466
 467         if (!ret && info->curr_fmt)
 468                 ret = cam_i2c_write(sd, ISP_CTL_REG(0),
 469                                 info->curr_fmt->ispctl1_reg);
 470         if (!ret)
 471                 ret = sr030pc30_set_flip(sd);
 472
 473         return ret;
 474 }
 475
 476 /* Find nearest matching image pixel size. */
 477 static int sr030pc30_try_frame_size(struct v4l2_mbus_framefmt *mf)
 478 {
 479         unsigned int min_err = ~0;
 480         int i = ARRAY_SIZE(sr030pc30_sizes);
 481         const struct sr030pc30_frmsize *fsize = &sr030pc30_sizes[0],
 482                                         *match = NULL;
 483         while (i--) {
 484                 int err = abs(fsize->width - mf->width)
 485                                 + abs(fsize->height - mf->height);
 486                 if (err < min_err) {
 487                         min_err = err;
 488                         match = fsize;
 489                 }
 490                 fsize++;
 491         }
 492         if (match) {
 493                 mf->width  = match->width;
 494                 mf->height = match->height;
 495                 return 0;
 496         }
 497         return -EINVAL;
 498 }
 499
 500 static int sr030pc30_queryctrl(struct v4l2_subdev *sd,
 501                                struct v4l2_queryctrl *qc)
 502 {
 503         int i;
 504
 505         for (i = 0; i < ARRAY_SIZE(sr030pc30_ctrl); i++)
 506                 if (qc->id == sr030pc30_ctrl[i].id) {
 507                         *qc = sr030pc30_ctrl[i];
 508                         v4l2_dbg(1, debug, sd, "%s id: %d\n",
 509                                  __func__, qc->id);
 510                         return 0;
 511                 }
 512
 513         return -EINVAL;
 514 }
 515
 516 static inline int sr030pc30_set_bluebalance(struct v4l2_subdev *sd, int value)
 517 {
 518         int ret = cam_i2c_write(sd, MWB_BGAIN_REG, value);
 519         if (!ret)
 520                 to_sr030pc30(sd)->blue_balance = value;
 521         return ret;
 522 }
 523
 524 static inline int sr030pc30_set_redbalance(struct v4l2_subdev *sd, int value)
 525 {
 526         int ret = cam_i2c_write(sd, MWB_RGAIN_REG, value);
 527         if (!ret)
 528                 to_sr030pc30(sd)->red_balance = value;
 529         return ret;
 530 }
 531
 532 static int sr030pc30_s_ctrl(struct v4l2_subdev *sd,
 533                             struct v4l2_control *ctrl)
 534 {
 535         int i, ret = 0;
 536
 537         for (i = 0; i < ARRAY_SIZE(sr030pc30_ctrl); i++)
 538                 if (ctrl->id == sr030pc30_ctrl[i].id)
 539                         break;
 540
 541         if (i == ARRAY_SIZE(sr030pc30_ctrl))
 542                 return -EINVAL;
 543
 544         if (ctrl->value < sr030pc30_ctrl[i].minimum ||
 545                 ctrl->value > sr030pc30_ctrl[i].maximum)
 546                         return -ERANGE;
 547
 548         v4l2_dbg(1, debug, sd, "%s: ctrl_id: %d, value: %d\n",
 549                          __func__, ctrl->id, ctrl->value);
 550
 551         switch (ctrl->id) {
 552         case V4L2_CID_AUTO_WHITE_BALANCE:
 553                 sr030pc30_enable_autowhitebalance(sd, ctrl->value);
 554                 break;
 555         case V4L2_CID_BLUE_BALANCE:
 556                 ret = sr030pc30_set_bluebalance(sd, ctrl->value);
 557                 break;
 558         case V4L2_CID_RED_BALANCE:
 559                 ret = sr030pc30_set_redbalance(sd, ctrl->value);
 560                 break;
 561         case V4L2_CID_EXPOSURE_AUTO:
 562                 sr030pc30_enable_autoexposure(sd,
 563                         ctrl->value == V4L2_EXPOSURE_AUTO);
 564                 break;
 565         case V4L2_CID_EXPOSURE:
 566                 ret = sr030pc30_set_exposure(sd, ctrl->value);
 567                 break;
 568         default:
 569                 return -EINVAL;
 570         }
 571
 572         return ret;
 573 }
 574
 575 static int sr030pc30_g_ctrl(struct v4l2_subdev *sd,
 576                             struct v4l2_control *ctrl)
 577 {
 578         struct sr030pc30_info *info = to_sr030pc30(sd);
 579
 580         v4l2_dbg(1, debug, sd, "%s: id: %d\n", __func__, ctrl->id);
 581
 582         switch (ctrl->id) {
 583         case V4L2_CID_AUTO_WHITE_BALANCE:
 584                 ctrl->value = info->auto_wb;
 585                 break;
 586         case V4L2_CID_BLUE_BALANCE:
 587                 ctrl->value = info->blue_balance;
 588                 break;
 589         case V4L2_CID_RED_BALANCE:
 590                 ctrl->value = info->red_balance;
 591                 break;
 592         case V4L2_CID_EXPOSURE_AUTO:
 593                 ctrl->value = info->auto_exp;
 594                 break;
 595         case V4L2_CID_EXPOSURE:
 596                 ctrl->value = info->exposure;
 597                 break;
 598         default:
 599                 return -EINVAL;
 600         }
 601         return 0;
 602 }
 603
 604 static int sr030pc30_enum_fmt(struct v4l2_subdev *sd, unsigned int index,
 605                               enum v4l2_mbus_pixelcode *code)
 606 {
 607         if (!code || index >= ARRAY_SIZE(sr030pc30_formats))
 608                 return -EINVAL;
 609
 610         *code = sr030pc30_formats[index].code;
 611         return 0;
 612 }
 613
 614 static int sr030pc30_g_fmt(struct v4l2_subdev *sd,
 615                            struct v4l2_mbus_framefmt *mf)
 616 {
 617         struct sr030pc30_info *info = to_sr030pc30(sd);
 618         int ret;
 619
 620         if (!mf)
 621                 return -EINVAL;
 622
 623         if (!info->curr_win || !info->curr_fmt) {
 624                 ret = sr030pc30_set_params(sd);
 625                 if (ret)
 626                         return ret;
 627         }
 628
 629         mf->width       = info->curr_win->width;
 630         mf->height      = info->curr_win->height;
 631         mf->code        = info->curr_fmt->code;
 632         mf->colorspace  = info->curr_fmt->colorspace;
 633         mf->field       = V4L2_FIELD_NONE;
 634
 635         return 0;
 636 }
 637
 638 /* Return nearest media bus frame format. */
 639 static const struct sr030pc30_format *try_fmt(struct v4l2_subdev *sd,
 640                                               struct v4l2_mbus_framefmt *mf)
 641 {
 642         int i = ARRAY_SIZE(sr030pc30_formats);
 643
 644         sr030pc30_try_frame_size(mf);
 645
 646         while (i--)
 647                 if (mf->code == sr030pc30_formats[i].code)
 648                         break;
 649
 650         mf->code = sr030pc30_formats[i].code;
 651
 652         return &sr030pc30_formats[i];
 653 }
 654
 655 /* Return nearest media bus frame format. */
 656 static int sr030pc30_try_fmt(struct v4l2_subdev *sd,
 657                              struct v4l2_mbus_framefmt *mf)
 658 {
 659         if (!sd || !mf)
 660                 return -EINVAL;
 661
 662         try_fmt(sd, mf);
 663         return 0;
 664 }
 665
 666 static int sr030pc30_s_fmt(struct v4l2_subdev *sd,
 667                            struct v4l2_mbus_framefmt *mf)
 668 {
 669         struct sr030pc30_info *info = to_sr030pc30(sd);
 670
 671         if (!sd || !mf)
 672                 return -EINVAL;
 673
 674         info->curr_fmt = try_fmt(sd, mf);
 675
 676         return sr030pc30_set_params(sd);
 677 }
 678
 679 static int sr030pc30_base_config(struct v4l2_subdev *sd)
 680 {
 681         struct sr030pc30_info *info = to_sr030pc30(sd);
 682         int ret;
 683         unsigned long expmin, expmax;
 684
 685         ret = sr030pc30_bulk_write_reg(sd, sr030pc30_base_regs);
 686         if (!ret) {
 687                 info->curr_fmt = &sr030pc30_formats[0];
 688                 info->curr_win = &sr030pc30_sizes[0];
 689                 ret = sr030pc30_set_params(sd);
 690         }
 691         if (!ret)
 692                 ret = sr030pc30_pwr_ctrl(sd, false, false);
 693
 694         if (!ret && !info->pdata)
 695                 return ret;
 696
 697         expmin = EXPOS_MIN_MS * info->pdata->clk_rate / (8 * 1000);
 698         expmax = EXPOS_MAX_MS * info->pdata->clk_rate / (8 * 1000);
 699
 700         v4l2_dbg(1, debug, sd, "%s: expmin= %lx, expmax= %lx", __func__,
 701                  expmin, expmax);
 702
 703         /* Setting up manual exposure time range */
 704         ret = cam_i2c_write(sd, EXP_MMINH_REG, expmin >> 8 & 0xFF);
 705         if (!ret)
 706                 ret = cam_i2c_write(sd, EXP_MMINL_REG, expmin & 0xFF);
 707         if (!ret)
 708                 ret = cam_i2c_write(sd, EXP_MMAXH_REG, expmax >> 16 & 0xFF);
 709         if (!ret)
 710                 ret = cam_i2c_write(sd, EXP_MMAXM_REG, expmax >> 8 & 0xFF);
 711         if (!ret)
 712                 ret = cam_i2c_write(sd, EXP_MMAXL_REG, expmax & 0xFF);
 713
 714         return ret;
 715 }
 716
 717 static int sr030pc30_s_stream(struct v4l2_subdev *sd, int enable)
 718 {
 719         return 0;
 720 }
 721
 722 static int sr030pc30_s_power(struct v4l2_subdev *sd, int on)
 723 {
 724         struct i2c_client *client = v4l2_get_subdevdata(sd);
 725         struct sr030pc30_info *info = to_sr030pc30(sd);
 726         const struct sr030pc30_platform_data *pdata = info->pdata;
 727         int ret;
 728
 729         if (pdata == NULL) {
 730                 WARN(1, "No platform data!\n");
 731                 return -EINVAL;
 732         }
 733
 734         /*
 735          * Put sensor into power sleep mode before switching off
 736          * power and disabling MCLK.
 737          */
 738         if (!on)
 739                 sr030pc30_pwr_ctrl(sd, false, true);
 740
 741         /* set_power controls sensor's power and clock */
 742         if (pdata->set_power) {
 743                 ret = pdata->set_power(&client->dev, on);
 744                 if (ret)
 745                         return ret;
 746         }
 747
 748         if (on) {
 749                 ret = sr030pc30_base_config(sd);
 750         } else {
 751                 ret = 0;
 752                 info->curr_win = NULL;
 753                 info->curr_fmt = NULL;
 754         }
 755
 756         return ret;
 757 }
 758
 759 static const struct v4l2_subdev_core_ops sr030pc30_core_ops = {
 760         .s_power        = sr030pc30_s_power,
 761         .queryctrl      = sr030pc30_queryctrl,
 762         .s_ctrl         = sr030pc30_s_ctrl,
 763         .g_ctrl         = sr030pc30_g_ctrl,
 764 };
 765
 766 static const struct v4l2_subdev_video_ops sr030pc30_video_ops = {
 767         .s_stream       = sr030pc30_s_stream,
 768         .g_mbus_fmt     = sr030pc30_g_fmt,
 769         .s_mbus_fmt     = sr030pc30_s_fmt,
 770         .try_mbus_fmt   = sr030pc30_try_fmt,
 771         .enum_mbus_fmt  = sr030pc30_enum_fmt,
 772 };
 773
 774 static const struct v4l2_subdev_ops sr030pc30_ops = {
 775         .core   = &sr030pc30_core_ops,
 776         .video  = &sr030pc30_video_ops,
 777 };
 778
 779 /*
 780  * Detect sensor type. Return 0 if SR030PC30 was detected
 781  * or -ENODEV otherwise.
 782  */
 783 static int sr030pc30_detect(struct i2c_client *client)
 784 {
 785         const struct sr030pc30_platform_data *pdata
 786                 = client->dev.platform_data;
 787         int ret;
 788
 789         /* Enable sensor's power and clock */
 790         if (pdata->set_power) {
 791                 ret = pdata->set_power(&client->dev, 1);
 792                 if (ret)
 793                         return ret;
 794         }
 795
 796         ret = i2c_smbus_read_byte_data(client, DEVICE_ID_REG);
 797
 798         if (pdata->set_power)
 799                 pdata->set_power(&client->dev, 0);
 800
 801         if (ret < 0) {
 802                 dev_err(&client->dev, "%s: I2C read failed\n", __func__);
 803                 return ret;
 804         }
 805
 806         return ret == SR030PC30_ID ? 0 : -ENODEV;
 807 }
 808
 809
 810 static int sr030pc30_probe(struct i2c_client *client,
 811                            const struct i2c_device_id *id)
 812 {
 813         struct sr030pc30_info *info;
 814         struct v4l2_subdev *sd;
 815         const struct sr030pc30_platform_data *pdata
 816                 = client->dev.platform_data;
 817         int ret;
 818
 819         if (!pdata) {
 820                 dev_err(&client->dev, "No platform data!");
 821                 return -EIO;
 822         }
 823
 824         ret = sr030pc30_detect(client);
 825         if (ret)
 826                 return ret;
 827
 828         info = kzalloc(sizeof(*info), GFP_KERNEL);
 829         if (!info)
 830                 return -ENOMEM;
 831
 832         sd = &info->sd;
 833         strcpy(sd->name, MODULE_NAME);
 834         info->pdata = client->dev.platform_data;
 835
 836         v4l2_i2c_subdev_init(sd, client, &sr030pc30_ops);
 837
 838         info->i2c_reg_page      = -1;
 839         info->hflip             = 1;
 840         info->auto_exp          = 1;
 841         info->exposure          = 30;
 842
 843         return 0;
 844 }
 845
 846 static int sr030pc30_remove(struct i2c_client *client)
 847 {
 848         struct v4l2_subdev *sd = i2c_get_clientdata(client);
 849         struct sr030pc30_info *info = to_sr030pc30(sd);
 850
 851         v4l2_device_unregister_subdev(sd);
 852         kfree(info);
 853         return 0;
 854 }
 855
 856 static const struct i2c_device_id sr030pc30_id[] = {
 857         { MODULE_NAME, 0 },
 858         { },
 859 };
 860 MODULE_DEVICE_TABLE(i2c, sr030pc30_id);
 861
 862
 863 static struct i2c_driver sr030pc30_i2c_driver = {
 864         .driver = {
 865                 .name = MODULE_NAME
 866         },
 867         .probe          = sr030pc30_probe,
 868         .remove         = sr030pc30_remove,
 869         .id_table       = sr030pc30_id,
 870 };
 871
 872 static int __init sr030pc30_init(void)
 873 {
 874         return i2c_add_driver(&sr030pc30_i2c_driver);
 875 }
 876
 877 static void __exit sr030pc30_exit(void)
 878 {
 879         i2c_del_driver(&sr030pc30_i2c_driver);
 880 }
 881
 882 module_init(sr030pc30_init);
 883 module_exit(sr030pc30_exit);
 884
 885 MODULE_DESCRIPTION("Siliconfile SR030PC30 camera driver");
 886 MODULE_AUTHOR("Sylwester Nawrocki <s.nawrocki@samsung.com>");
 887 MODULE_LICENSE("GPL");