drivers/media/i2c/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
  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 <linux/module.h>
  23 #include <media/v4l2-device.h>
  24 #include <media/v4l2-subdev.h>
  25 #include <media/v4l2-mediabus.h>
  26 #include <media/v4l2-ctrls.h>
  27 #include <media/i2c/sr030pc30.h>
  28
  29 static int debug;
  30 module_param(debug, int, 0644);
  31
  32 #define MODULE_NAME     "SR030PC30"
  33
  34 /*
  35  * Register offsets within a page
  36  * b15..b8 - page id, b7..b0 - register address
  37  */
  38 #define POWER_CTRL_REG          0x0001
  39 #define PAGEMODE_REG            0x03
  40 #define DEVICE_ID_REG           0x0004
  41 #define NOON010PC30_ID          0x86
  42 #define SR030PC30_ID            0x8C
  43 #define VDO_CTL1_REG            0x0010
  44 #define SUBSAMPL_NONE_VGA       0
  45 #define SUBSAMPL_QVGA           0x10
  46 #define SUBSAMPL_QQVGA          0x20
  47 #define VDO_CTL2_REG            0x0011
  48 #define SYNC_CTL_REG            0x0012
  49 #define WIN_ROWH_REG            0x0020
  50 #define WIN_ROWL_REG            0x0021
  51 #define WIN_COLH_REG            0x0022
  52 #define WIN_COLL_REG            0x0023
  53 #define WIN_HEIGHTH_REG         0x0024
  54 #define WIN_HEIGHTL_REG         0x0025
  55 #define WIN_WIDTHH_REG          0x0026
  56 #define WIN_WIDTHL_REG          0x0027
  57 #define HBLANKH_REG             0x0040
  58 #define HBLANKL_REG             0x0041
  59 #define VSYNCH_REG              0x0042
  60 #define VSYNCL_REG              0x0043
  61 /* page 10 */
  62 #define ISP_CTL_REG(n)          (0x1010 + (n))
  63 #define YOFS_REG                0x1040
  64 #define DARK_YOFS_REG           0x1041
  65 #define AG_ABRTH_REG            0x1050
  66 #define SAT_CTL_REG             0x1060
  67 #define BSAT_REG                0x1061
  68 #define RSAT_REG                0x1062
  69 #define AG_SAT_TH_REG           0x1063
  70 /* page 11 */
  71 #define ZLPF_CTRL_REG           0x1110
  72 #define ZLPF_CTRL2_REG          0x1112
  73 #define ZLPF_AGH_THR_REG        0x1121
  74 #define ZLPF_THR_REG            0x1160
  75 #define ZLPF_DYN_THR_REG        0x1160
  76 /* page 12 */
  77 #define YCLPF_CTL1_REG          0x1240
  78 #define YCLPF_CTL2_REG          0x1241
  79 #define YCLPF_THR_REG           0x1250
  80 #define BLPF_CTL_REG            0x1270
  81 #define BLPF_THR1_REG           0x1274
  82 #define BLPF_THR2_REG           0x1275
  83 /* page 14 - Lens Shading Compensation */
  84 #define LENS_CTRL_REG           0x1410
  85 #define LENS_XCEN_REG           0x1420
  86 #define LENS_YCEN_REG           0x1421
  87 #define LENS_R_COMP_REG         0x1422
  88 #define LENS_G_COMP_REG         0x1423
  89 #define LENS_B_COMP_REG         0x1424
  90 /* page 15 - Color correction */
  91 #define CMC_CTL_REG             0x1510
  92 #define CMC_OFSGH_REG           0x1514
  93 #define CMC_OFSGL_REG           0x1516
  94 #define CMC_SIGN_REG            0x1517
  95 /* Color correction coefficients */
  96 #define CMC_COEF_REG(n)         (0x1530 + (n))
  97 /* Color correction offset coefficients */
  98 #define CMC_OFS_REG(n)          (0x1540 + (n))
  99 /* page 16 - Gamma correction */
 100 #define GMA_CTL_REG             0x1610
 101 /* Gamma correction coefficients 0.14 */
 102 #define GMA_COEF_REG(n)         (0x1630 + (n))
 103 /* page 20 - Auto Exposure */
 104 #define AE_CTL1_REG             0x2010
 105 #define AE_CTL2_REG             0x2011
 106 #define AE_FRM_CTL_REG          0x2020
 107 #define AE_FINE_CTL_REG(n)      (0x2028 + (n))
 108 #define EXP_TIMEH_REG           0x2083
 109 #define EXP_TIMEM_REG           0x2084
 110 #define EXP_TIMEL_REG           0x2085
 111 #define EXP_MMINH_REG           0x2086
 112 #define EXP_MMINL_REG           0x2087
 113 #define EXP_MMAXH_REG           0x2088
 114 #define EXP_MMAXM_REG           0x2089
 115 #define EXP_MMAXL_REG           0x208A
 116 /* page 22 - Auto White Balance */
 117 #define AWB_CTL1_REG            0x2210
 118 #define AWB_ENABLE              0x80
 119 #define AWB_CTL2_REG            0x2211
 120 #define MWB_ENABLE              0x01
 121 /* RGB gain control (manual WB) when AWB_CTL1[7]=0 */
 122 #define AWB_RGAIN_REG           0x2280
 123 #define AWB_GGAIN_REG           0x2281
 124 #define AWB_BGAIN_REG           0x2282
 125 #define AWB_RMAX_REG            0x2283
 126 #define AWB_RMIN_REG            0x2284
 127 #define AWB_BMAX_REG            0x2285
 128 #define AWB_BMIN_REG            0x2286
 129 /* R, B gain range in bright light conditions */
 130 #define AWB_RMAXB_REG           0x2287
 131 #define AWB_RMINB_REG           0x2288
 132 #define AWB_BMAXB_REG           0x2289
 133 #define AWB_BMINB_REG           0x228A
 134 /* manual white balance, when AWB_CTL2[0]=1 */
 135 #define MWB_RGAIN_REG           0x22B2
 136 #define MWB_BGAIN_REG           0x22B3
 137 /* the token to mark an array end */
 138 #define REG_TERM                0xFFFF
 139
 140 /* Minimum and maximum exposure time in ms */
 141 #define EXPOS_MIN_MS            1
 142 #define EXPOS_MAX_MS            125
 143
 144 struct sr030pc30_info {
 145         struct v4l2_subdev sd;
 146         struct v4l2_ctrl_handler hdl;
 147         const struct sr030pc30_platform_data *pdata;
 148         const struct sr030pc30_format *curr_fmt;
 149         const struct sr030pc30_frmsize *curr_win;
 150         unsigned int hflip:1;
 151         unsigned int vflip:1;
 152         unsigned int sleep:1;
 153         struct {
 154                 /* auto whitebalance control cluster */
 155                 struct v4l2_ctrl *awb;
 156                 struct v4l2_ctrl *red;
 157                 struct v4l2_ctrl *blue;
 158         };
 159         struct {
 160                 /* auto exposure control cluster */
 161                 struct v4l2_ctrl *autoexp;
 162                 struct v4l2_ctrl *exp;
 163         };
 164         u8 i2c_reg_page;
 165 };
 166
 167 struct sr030pc30_format {
 168         u32 code;
 169         enum v4l2_colorspace colorspace;
 170         u16 ispctl1_reg;
 171 };
 172
 173 struct sr030pc30_frmsize {
 174         u16 width;
 175         u16 height;
 176         int vid_ctl1;
 177 };
 178
 179 struct i2c_regval {
 180         u16 addr;
 181         u16 val;
 182 };
 183
 184 /* supported resolutions */
 185 static const struct sr030pc30_frmsize sr030pc30_sizes[] = {
 186         {
 187                 .width          = 640,
 188                 .height         = 480,
 189                 .vid_ctl1       = SUBSAMPL_NONE_VGA,
 190         }, {
 191                 .width          = 320,
 192                 .height         = 240,
 193                 .vid_ctl1       = SUBSAMPL_QVGA,
 194         }, {
 195                 .width          = 160,
 196                 .height         = 120,
 197                 .vid_ctl1       = SUBSAMPL_QQVGA,
 198         },
 199 };
 200
 201 /* supported pixel formats */
 202 static const struct sr030pc30_format sr030pc30_formats[] = {
 203         {
 204                 .code           = MEDIA_BUS_FMT_YUYV8_2X8,
 205                 .colorspace     = V4L2_COLORSPACE_JPEG,
 206                 .ispctl1_reg    = 0x03,
 207         }, {
 208                 .code           = MEDIA_BUS_FMT_YVYU8_2X8,
 209                 .colorspace     = V4L2_COLORSPACE_JPEG,
 210                 .ispctl1_reg    = 0x02,
 211         }, {
 212                 .code           = MEDIA_BUS_FMT_VYUY8_2X8,
 213                 .colorspace     = V4L2_COLORSPACE_JPEG,
 214                 .ispctl1_reg    = 0,
 215         }, {
 216                 .code           = MEDIA_BUS_FMT_UYVY8_2X8,
 217                 .colorspace     = V4L2_COLORSPACE_JPEG,
 218                 .ispctl1_reg    = 0x01,
 219         }, {
 220                 .code           = MEDIA_BUS_FMT_RGB565_2X8_BE,
 221                 .colorspace     = V4L2_COLORSPACE_JPEG,
 222                 .ispctl1_reg    = 0x40,
 223         },
 224 };
 225
 226 static const struct i2c_regval sr030pc30_base_regs[] = {
 227         /* Window size and position within pixel matrix */
 228         { WIN_ROWH_REG,         0x00 }, { WIN_ROWL_REG,         0x06 },
 229         { WIN_COLH_REG,         0x00 }, { WIN_COLL_REG,         0x06 },
 230         { WIN_HEIGHTH_REG,      0x01 }, { WIN_HEIGHTL_REG,      0xE0 },
 231         { WIN_WIDTHH_REG,       0x02 }, { WIN_WIDTHL_REG,       0x80 },
 232         { HBLANKH_REG,          0x01 }, { HBLANKL_REG,          0x50 },
 233         { VSYNCH_REG,           0x00 }, { VSYNCL_REG,           0x14 },
 234         { SYNC_CTL_REG,         0 },
 235         /* Color corection and saturation */
 236         { ISP_CTL_REG(0),       0x30 }, { YOFS_REG,             0x80 },
 237         { DARK_YOFS_REG,        0x04 }, { AG_ABRTH_REG,         0x78 },
 238         { SAT_CTL_REG,          0x1F }, { BSAT_REG,             0x90 },
 239         { AG_SAT_TH_REG,        0xF0 }, { 0x1064,               0x80 },
 240         { CMC_CTL_REG,          0x03 }, { CMC_OFSGH_REG,        0x3C },
 241         { CMC_OFSGL_REG,        0x2C }, { CMC_SIGN_REG,         0x2F },
 242         { CMC_COEF_REG(0),      0xCB }, { CMC_OFS_REG(0),       0x87 },
 243         { CMC_COEF_REG(1),      0x61 }, { CMC_OFS_REG(1),       0x18 },
 244         { CMC_COEF_REG(2),      0x16 }, { CMC_OFS_REG(2),       0x91 },
 245         { CMC_COEF_REG(3),      0x23 }, { CMC_OFS_REG(3),       0x94 },
 246         { CMC_COEF_REG(4),      0xCE }, { CMC_OFS_REG(4),       0x9f },
 247         { CMC_COEF_REG(5),      0x2B }, { CMC_OFS_REG(5),       0x33 },
 248         { CMC_COEF_REG(6),      0x01 }, { CMC_OFS_REG(6),       0x00 },
 249         { CMC_COEF_REG(7),      0x34 }, { CMC_OFS_REG(7),       0x94 },
 250         { CMC_COEF_REG(8),      0x75 }, { CMC_OFS_REG(8),       0x14 },
 251         /* Color corection coefficients */
 252         { GMA_CTL_REG,          0x03 }, { GMA_COEF_REG(0),      0x00 },
 253         { GMA_COEF_REG(1),      0x19 }, { GMA_COEF_REG(2),      0x26 },
 254         { GMA_COEF_REG(3),      0x3B }, { GMA_COEF_REG(4),      0x5D },
 255         { GMA_COEF_REG(5),      0x79 }, { GMA_COEF_REG(6),      0x8E },
 256         { GMA_COEF_REG(7),      0x9F }, { GMA_COEF_REG(8),      0xAF },
 257         { GMA_COEF_REG(9),      0xBD }, { GMA_COEF_REG(10),     0xCA },
 258         { GMA_COEF_REG(11),     0xDD }, { GMA_COEF_REG(12),     0xEC },
 259         { GMA_COEF_REG(13),     0xF7 }, { GMA_COEF_REG(14),     0xFF },
 260         /* Noise reduction, Z-LPF, YC-LPF and BLPF filters setup */
 261         { ZLPF_CTRL_REG,        0x99 }, { ZLPF_CTRL2_REG,       0x0E },
 262         { ZLPF_AGH_THR_REG,     0x29 }, { ZLPF_THR_REG,         0x0F },
 263         { ZLPF_DYN_THR_REG,     0x63 }, { YCLPF_CTL1_REG,       0x23 },
 264         { YCLPF_CTL2_REG,       0x3B }, { YCLPF_THR_REG,        0x05 },
 265         { BLPF_CTL_REG,         0x1D }, { BLPF_THR1_REG,        0x05 },
 266         { BLPF_THR2_REG,        0x04 },
 267         /* Automatic white balance */
 268         { AWB_CTL1_REG,         0xFB }, { AWB_CTL2_REG,         0x26 },
 269         { AWB_RMAX_REG,         0x54 }, { AWB_RMIN_REG,         0x2B },
 270         { AWB_BMAX_REG,         0x57 }, { AWB_BMIN_REG,         0x29 },
 271         { AWB_RMAXB_REG,        0x50 }, { AWB_RMINB_REG,        0x43 },
 272         { AWB_BMAXB_REG,        0x30 }, { AWB_BMINB_REG,        0x22 },
 273         /* Auto exposure */
 274         { AE_CTL1_REG,          0x8C }, { AE_CTL2_REG,          0x04 },
 275         { AE_FRM_CTL_REG,       0x01 }, { AE_FINE_CTL_REG(0),   0x3F },
 276         { AE_FINE_CTL_REG(1),   0xA3 }, { AE_FINE_CTL_REG(3),   0x34 },
 277         /* Lens shading compensation */
 278         { LENS_CTRL_REG,        0x01 }, { LENS_XCEN_REG,        0x80 },
 279         { LENS_YCEN_REG,        0x70 }, { LENS_R_COMP_REG,      0x53 },
 280         { LENS_G_COMP_REG,      0x40 }, { LENS_B_COMP_REG,      0x3e },
 281         { REG_TERM,             0 },
 282 };
 283
 284 static inline struct sr030pc30_info *to_sr030pc30(struct v4l2_subdev *sd)
 285 {
 286         return container_of(sd, struct sr030pc30_info, sd);
 287 }
 288
 289 static inline int set_i2c_page(struct sr030pc30_info *info,
 290                                struct i2c_client *client, unsigned int reg)
 291 {
 292         int ret = 0;
 293         u32 page = reg >> 8 & 0xFF;
 294
 295         if (info->i2c_reg_page != page && (reg & 0xFF) != 0x03) {
 296                 ret = i2c_smbus_write_byte_data(client, PAGEMODE_REG, page);
 297                 if (!ret)
 298                         info->i2c_reg_page = page;
 299         }
 300         return ret;
 301 }
 302
 303 static int cam_i2c_read(struct v4l2_subdev *sd, u32 reg_addr)
 304 {
 305         struct i2c_client *client = v4l2_get_subdevdata(sd);
 306         struct sr030pc30_info *info = to_sr030pc30(sd);
 307
 308         int ret = set_i2c_page(info, client, reg_addr);
 309         if (!ret)
 310                 ret = i2c_smbus_read_byte_data(client, reg_addr & 0xFF);
 311         return ret;
 312 }
 313
 314 static int cam_i2c_write(struct v4l2_subdev *sd, u32 reg_addr, u32 val)
 315 {
 316         struct i2c_client *client = v4l2_get_subdevdata(sd);
 317         struct sr030pc30_info *info = to_sr030pc30(sd);
 318
 319         int ret = set_i2c_page(info, client, reg_addr);
 320         if (!ret)
 321                 ret = i2c_smbus_write_byte_data(
 322                         client, reg_addr & 0xFF, val);
 323         return ret;
 324 }
 325
 326 static inline int sr030pc30_bulk_write_reg(struct v4l2_subdev *sd,
 327                                 const struct i2c_regval *msg)
 328 {
 329         while (msg->addr != REG_TERM) {
 330                 int ret = cam_i2c_write(sd, msg->addr, msg->val);
 331                 if (ret)
 332                         return ret;
 333                 msg++;
 334         }
 335         return 0;
 336 }
 337
 338 /* Device reset and sleep mode control */
 339 static int sr030pc30_pwr_ctrl(struct v4l2_subdev *sd,
 340                                      bool reset, bool sleep)
 341 {
 342         struct sr030pc30_info *info = to_sr030pc30(sd);
 343         u8 reg = sleep ? 0xF1 : 0xF0;
 344         int ret = 0;
 345
 346         if (reset)
 347                 ret = cam_i2c_write(sd, POWER_CTRL_REG, reg | 0x02);
 348         if (!ret) {
 349                 ret = cam_i2c_write(sd, POWER_CTRL_REG, reg);
 350                 if (!ret) {
 351                         info->sleep = sleep;
 352                         if (reset)
 353                                 info->i2c_reg_page = -1;
 354                 }
 355         }
 356         return ret;
 357 }
 358
 359 static int sr030pc30_set_flip(struct v4l2_subdev *sd)
 360 {
 361         struct sr030pc30_info *info = to_sr030pc30(sd);
 362
 363         s32 reg = cam_i2c_read(sd, VDO_CTL2_REG);
 364         if (reg < 0)
 365                 return reg;
 366
 367         reg &= 0x7C;
 368         if (info->hflip)
 369                 reg |= 0x01;
 370         if (info->vflip)
 371                 reg |= 0x02;
 372         return cam_i2c_write(sd, VDO_CTL2_REG, reg | 0x80);
 373 }
 374
 375 /* Configure resolution, color format and image flip */
 376 static int sr030pc30_set_params(struct v4l2_subdev *sd)
 377 {
 378         struct sr030pc30_info *info = to_sr030pc30(sd);
 379         int ret;
 380
 381         if (!info->curr_win)
 382                 return -EINVAL;
 383
 384         /* Configure the resolution through subsampling */
 385         ret = cam_i2c_write(sd, VDO_CTL1_REG,
 386                             info->curr_win->vid_ctl1);
 387
 388         if (!ret && info->curr_fmt)
 389                 ret = cam_i2c_write(sd, ISP_CTL_REG(0),
 390                                 info->curr_fmt->ispctl1_reg);
 391         if (!ret)
 392                 ret = sr030pc30_set_flip(sd);
 393
 394         return ret;
 395 }
 396
 397 /* Find nearest matching image pixel size. */
 398 static int sr030pc30_try_frame_size(struct v4l2_mbus_framefmt *mf)
 399 {
 400         unsigned int min_err = ~0;
 401         int i = ARRAY_SIZE(sr030pc30_sizes);
 402         const struct sr030pc30_frmsize *fsize = &sr030pc30_sizes[0],
 403                                         *match = NULL;
 404         while (i--) {
 405                 int err = abs(fsize->width - mf->width)
 406                                 + abs(fsize->height - mf->height);
 407                 if (err < min_err) {
 408                         min_err = err;
 409                         match = fsize;
 410                 }
 411                 fsize++;
 412         }
 413         if (match) {
 414                 mf->width  = match->width;
 415                 mf->height = match->height;
 416                 return 0;
 417         }
 418         return -EINVAL;
 419 }
 420
 421 static int sr030pc30_s_ctrl(struct v4l2_ctrl *ctrl)
 422 {
 423         struct sr030pc30_info *info =
 424                 container_of(ctrl->handler, struct sr030pc30_info, hdl);
 425         struct v4l2_subdev *sd = &info->sd;
 426         int ret = 0;
 427
 428         v4l2_dbg(1, debug, sd, "%s: ctrl_id: %d, value: %d\n",
 429                          __func__, ctrl->id, ctrl->val);
 430
 431         switch (ctrl->id) {
 432         case V4L2_CID_AUTO_WHITE_BALANCE:
 433                 if (ctrl->is_new) {
 434                         ret = cam_i2c_write(sd, AWB_CTL2_REG,
 435                                         ctrl->val ? 0x2E : 0x2F);
 436                         if (!ret)
 437                                 ret = cam_i2c_write(sd, AWB_CTL1_REG,
 438                                                 ctrl->val ? 0xFB : 0x7B);
 439                 }
 440                 if (!ret && info->blue->is_new)
 441                         ret = cam_i2c_write(sd, MWB_BGAIN_REG, info->blue->val);
 442                 if (!ret && info->red->is_new)
 443                         ret = cam_i2c_write(sd, MWB_RGAIN_REG, info->red->val);
 444                 return ret;
 445
 446         case V4L2_CID_EXPOSURE_AUTO:
 447                 /* auto anti-flicker is also enabled here */
 448                 if (ctrl->is_new)
 449                         ret = cam_i2c_write(sd, AE_CTL1_REG,
 450                                 ctrl->val == V4L2_EXPOSURE_AUTO ? 0xDC : 0x0C);
 451                 if (info->exp->is_new) {
 452                         unsigned long expos = info->exp->val;
 453
 454                         expos = expos * info->pdata->clk_rate / (8 * 1000);
 455
 456                         if (!ret)
 457                                 ret = cam_i2c_write(sd, EXP_TIMEH_REG,
 458                                                 expos >> 16 & 0xFF);
 459                         if (!ret)
 460                                 ret = cam_i2c_write(sd, EXP_TIMEM_REG,
 461                                                 expos >> 8 & 0xFF);
 462                         if (!ret)
 463                                 ret = cam_i2c_write(sd, EXP_TIMEL_REG,
 464                                                 expos & 0xFF);
 465                 }
 466                 return ret;
 467         default:
 468                 return -EINVAL;
 469         }
 470
 471         return 0;
 472 }
 473
 474 static int sr030pc30_enum_mbus_code(struct v4l2_subdev *sd,
 475                 struct v4l2_subdev_pad_config *cfg,
 476                 struct v4l2_subdev_mbus_code_enum *code)
 477 {
 478         if (!code || code->pad ||
 479             code->index >= ARRAY_SIZE(sr030pc30_formats))
 480                 return -EINVAL;
 481
 482         code->code = sr030pc30_formats[code->index].code;
 483         return 0;
 484 }
 485
 486 static int sr030pc30_get_fmt(struct v4l2_subdev *sd,
 487                 struct v4l2_subdev_pad_config *cfg,
 488                 struct v4l2_subdev_format *format)
 489 {
 490         struct v4l2_mbus_framefmt *mf;
 491         struct sr030pc30_info *info = to_sr030pc30(sd);
 492
 493         if (!format || format->pad)
 494                 return -EINVAL;
 495
 496         mf = &format->format;
 497
 498         if (!info->curr_win || !info->curr_fmt)
 499                 return -EINVAL;
 500
 501         mf->width       = info->curr_win->width;
 502         mf->height      = info->curr_win->height;
 503         mf->code        = info->curr_fmt->code;
 504         mf->colorspace  = info->curr_fmt->colorspace;
 505         mf->field       = V4L2_FIELD_NONE;
 506
 507         return 0;
 508 }
 509
 510 /* Return nearest media bus frame format. */
 511 static const struct sr030pc30_format *try_fmt(struct v4l2_subdev *sd,
 512                                               struct v4l2_mbus_framefmt *mf)
 513 {
 514         int i = ARRAY_SIZE(sr030pc30_formats);
 515
 516         sr030pc30_try_frame_size(mf);
 517
 518         while (i--)
 519                 if (mf->code == sr030pc30_formats[i].code)
 520                         break;
 521
 522         mf->code = sr030pc30_formats[i].code;
 523
 524         return &sr030pc30_formats[i];
 525 }
 526
 527 /* Return nearest media bus frame format. */
 528 static int sr030pc30_set_fmt(struct v4l2_subdev *sd,
 529                 struct v4l2_subdev_pad_config *cfg,
 530                 struct v4l2_subdev_format *format)
 531 {
 532         struct sr030pc30_info *info = sd ? to_sr030pc30(sd) : NULL;
 533         const struct sr030pc30_format *fmt;
 534         struct v4l2_mbus_framefmt *mf;
 535
 536         if (!sd || !format)
 537                 return -EINVAL;
 538
 539         mf = &format->format;
 540         if (format->pad)
 541                 return -EINVAL;
 542
 543         fmt = try_fmt(sd, mf);
 544         if (format->which == V4L2_SUBDEV_FORMAT_TRY) {
 545                 cfg->try_fmt = *mf;
 546                 return 0;
 547         }
 548
 549         info->curr_fmt = fmt;
 550
 551         return sr030pc30_set_params(sd);
 552 }
 553
 554 static int sr030pc30_base_config(struct v4l2_subdev *sd)
 555 {
 556         struct sr030pc30_info *info = to_sr030pc30(sd);
 557         int ret;
 558         unsigned long expmin, expmax;
 559
 560         ret = sr030pc30_bulk_write_reg(sd, sr030pc30_base_regs);
 561         if (!ret) {
 562                 info->curr_fmt = &sr030pc30_formats[0];
 563                 info->curr_win = &sr030pc30_sizes[0];
 564                 ret = sr030pc30_set_params(sd);
 565         }
 566         if (!ret)
 567                 ret = sr030pc30_pwr_ctrl(sd, false, false);
 568
 569         if (!ret && !info->pdata)
 570                 return ret;
 571
 572         expmin = EXPOS_MIN_MS * info->pdata->clk_rate / (8 * 1000);
 573         expmax = EXPOS_MAX_MS * info->pdata->clk_rate / (8 * 1000);
 574
 575         v4l2_dbg(1, debug, sd, "%s: expmin= %lx, expmax= %lx", __func__,
 576                  expmin, expmax);
 577
 578         /* Setting up manual exposure time range */
 579         ret = cam_i2c_write(sd, EXP_MMINH_REG, expmin >> 8 & 0xFF);
 580         if (!ret)
 581                 ret = cam_i2c_write(sd, EXP_MMINL_REG, expmin & 0xFF);
 582         if (!ret)
 583                 ret = cam_i2c_write(sd, EXP_MMAXH_REG, expmax >> 16 & 0xFF);
 584         if (!ret)
 585                 ret = cam_i2c_write(sd, EXP_MMAXM_REG, expmax >> 8 & 0xFF);
 586         if (!ret)
 587                 ret = cam_i2c_write(sd, EXP_MMAXL_REG, expmax & 0xFF);
 588
 589         return ret;
 590 }
 591
 592 static int sr030pc30_s_power(struct v4l2_subdev *sd, int on)
 593 {
 594         struct i2c_client *client = v4l2_get_subdevdata(sd);
 595         struct sr030pc30_info *info = to_sr030pc30(sd);
 596         const struct sr030pc30_platform_data *pdata = info->pdata;
 597         int ret;
 598
 599         if (pdata == NULL) {
 600                 WARN(1, "No platform data!\n");
 601                 return -EINVAL;
 602         }
 603
 604         /*
 605          * Put sensor into power sleep mode before switching off
 606          * power and disabling MCLK.
 607          */
 608         if (!on)
 609                 sr030pc30_pwr_ctrl(sd, false, true);
 610
 611         /* set_power controls sensor's power and clock */
 612         if (pdata->set_power) {
 613                 ret = pdata->set_power(&client->dev, on);
 614                 if (ret)
 615                         return ret;
 616         }
 617
 618         if (on) {
 619                 ret = sr030pc30_base_config(sd);
 620         } else {
 621                 ret = 0;
 622                 info->curr_win = NULL;
 623                 info->curr_fmt = NULL;
 624         }
 625
 626         return ret;
 627 }
 628
 629 static const struct v4l2_ctrl_ops sr030pc30_ctrl_ops = {
 630         .s_ctrl = sr030pc30_s_ctrl,
 631 };
 632
 633 static const struct v4l2_subdev_core_ops sr030pc30_core_ops = {
 634         .s_power        = sr030pc30_s_power,
 635 };
 636
 637 static const struct v4l2_subdev_pad_ops sr030pc30_pad_ops = {
 638         .enum_mbus_code = sr030pc30_enum_mbus_code,
 639         .get_fmt        = sr030pc30_get_fmt,
 640         .set_fmt        = sr030pc30_set_fmt,
 641 };
 642
 643 static const struct v4l2_subdev_ops sr030pc30_ops = {
 644         .core   = &sr030pc30_core_ops,
 645         .pad    = &sr030pc30_pad_ops,
 646 };
 647
 648 /*
 649  * Detect sensor type. Return 0 if SR030PC30 was detected
 650  * or -ENODEV otherwise.
 651  */
 652 static int sr030pc30_detect(struct i2c_client *client)
 653 {
 654         const struct sr030pc30_platform_data *pdata
 655                 = client->dev.platform_data;
 656         int ret;
 657
 658         /* Enable sensor's power and clock */
 659         if (pdata->set_power) {
 660                 ret = pdata->set_power(&client->dev, 1);
 661                 if (ret)
 662                         return ret;
 663         }
 664
 665         ret = i2c_smbus_read_byte_data(client, DEVICE_ID_REG);
 666
 667         if (pdata->set_power)
 668                 pdata->set_power(&client->dev, 0);
 669
 670         if (ret < 0) {
 671                 dev_err(&client->dev, "%s: I2C read failed\n", __func__);
 672                 return ret;
 673         }
 674
 675         return ret == SR030PC30_ID ? 0 : -ENODEV;
 676 }
 677
 678
 679 static int sr030pc30_probe(struct i2c_client *client,
 680                            const struct i2c_device_id *id)
 681 {
 682         struct sr030pc30_info *info;
 683         struct v4l2_subdev *sd;
 684         struct v4l2_ctrl_handler *hdl;
 685         const struct sr030pc30_platform_data *pdata
 686                 = client->dev.platform_data;
 687         int ret;
 688
 689         if (!pdata) {
 690                 dev_err(&client->dev, "No platform data!");
 691                 return -EIO;
 692         }
 693
 694         ret = sr030pc30_detect(client);
 695         if (ret)
 696                 return ret;
 697
 698         info = devm_kzalloc(&client->dev, sizeof(*info), GFP_KERNEL);
 699         if (!info)
 700                 return -ENOMEM;
 701
 702         sd = &info->sd;
 703         strcpy(sd->name, MODULE_NAME);
 704         info->pdata = client->dev.platform_data;
 705
 706         v4l2_i2c_subdev_init(sd, client, &sr030pc30_ops);
 707
 708         hdl = &info->hdl;
 709         v4l2_ctrl_handler_init(hdl, 6);
 710         info->awb = v4l2_ctrl_new_std(hdl, &sr030pc30_ctrl_ops,
 711                         V4L2_CID_AUTO_WHITE_BALANCE, 0, 1, 1, 1);
 712         info->red = v4l2_ctrl_new_std(hdl, &sr030pc30_ctrl_ops,
 713                         V4L2_CID_RED_BALANCE, 0, 127, 1, 64);
 714         info->blue = v4l2_ctrl_new_std(hdl, &sr030pc30_ctrl_ops,
 715                         V4L2_CID_BLUE_BALANCE, 0, 127, 1, 64);
 716         info->autoexp = v4l2_ctrl_new_std(hdl, &sr030pc30_ctrl_ops,
 717                         V4L2_CID_EXPOSURE_AUTO, 0, 1, 1, 1);
 718         info->exp = v4l2_ctrl_new_std(hdl, &sr030pc30_ctrl_ops,
 719                         V4L2_CID_EXPOSURE, EXPOS_MIN_MS, EXPOS_MAX_MS, 1, 30);
 720         sd->ctrl_handler = hdl;
 721         if (hdl->error) {
 722                 int err = hdl->error;
 723
 724                 v4l2_ctrl_handler_free(hdl);
 725                 return err;
 726         }
 727         v4l2_ctrl_auto_cluster(3, &info->awb, 0, false);
 728         v4l2_ctrl_auto_cluster(2, &info->autoexp, V4L2_EXPOSURE_MANUAL, false);
 729         v4l2_ctrl_handler_setup(hdl);
 730
 731         info->i2c_reg_page      = -1;
 732         info->hflip             = 1;
 733
 734         return 0;
 735 }
 736
 737 static int sr030pc30_remove(struct i2c_client *client)
 738 {
 739         struct v4l2_subdev *sd = i2c_get_clientdata(client);
 740
 741         v4l2_device_unregister_subdev(sd);
 742         v4l2_ctrl_handler_free(sd->ctrl_handler);
 743         return 0;
 744 }
 745
 746 static const struct i2c_device_id sr030pc30_id[] = {
 747         { MODULE_NAME, 0 },
 748         { },
 749 };
 750 MODULE_DEVICE_TABLE(i2c, sr030pc30_id);
 751
 752
 753 static struct i2c_driver sr030pc30_i2c_driver = {
 754         .driver = {
 755                 .name = MODULE_NAME
 756         },
 757         .probe          = sr030pc30_probe,
 758         .remove         = sr030pc30_remove,
 759         .id_table       = sr030pc30_id,
 760 };
 761
 762 module_i2c_driver(sr030pc30_i2c_driver);
 763
 764 MODULE_DESCRIPTION("Siliconfile SR030PC30 camera driver");
 765 MODULE_AUTHOR("Sylwester Nawrocki <s.nawrocki@samsung.com>");
 766 MODULE_LICENSE("GPL");