drivers/media/video/noon010pc30.c

   1 /*
   2  * Driver for SiliconFile NOON010PC30 CIF (1/11") Image Sensor with ISP
   3  *
   4  * Copyright (C) 2010 Samsung Electronics
   5  * Contact: Sylwester Nawrocki, <s.nawrocki@samsung.com>
   6  *
   7  * Initial register configuration based on a driver authored by
   8  * HeungJun Kim <riverful.kim@samsung.com>.
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License as published by
  12  * the Free Software Foundation; either version 2 of the License, or
  13  * (at your option) any later vergsion.
  14  */
  15
  16 #include <linux/delay.h>
  17 #include <linux/gpio.h>
  18 #include <linux/i2c.h>
  19 #include <linux/slab.h>
  20 #include <linux/regulator/consumer.h>
  21 #include <media/noon010pc30.h>
  22 #include <media/v4l2-chip-ident.h>
  23 #include <linux/videodev2.h>
  24 #include <media/v4l2-ctrls.h>
  25 #include <media/v4l2-device.h>
  26 #include <media/v4l2-mediabus.h>
  27 #include <media/v4l2-subdev.h>
  28
  29 static int debug;
  30 module_param(debug, int, 0644);
  31 MODULE_PARM_DESC(debug, "Enable module debug trace. Set to 1 to enable.");
  32
  33 #define MODULE_NAME             "NOON010PC30"
  34
  35 /*
  36  * Register offsets within a page
  37  * b15..b8 - page id, b7..b0 - register address
  38  */
  39 #define POWER_CTRL_REG          0x0001
  40 #define PAGEMODE_REG            0x03
  41 #define DEVICE_ID_REG           0x0004
  42 #define NOON010PC30_ID          0x86
  43 #define VDO_CTL_REG(n)          (0x0010 + (n))
  44 #define SYNC_CTL_REG            0x0012
  45 /* Window size and position */
  46 #define WIN_ROWH_REG            0x0013
  47 #define WIN_ROWL_REG            0x0014
  48 #define WIN_COLH_REG            0x0015
  49 #define WIN_COLL_REG            0x0016
  50 #define WIN_HEIGHTH_REG         0x0017
  51 #define WIN_HEIGHTL_REG         0x0018
  52 #define WIN_WIDTHH_REG          0x0019
  53 #define WIN_WIDTHL_REG          0x001A
  54 #define HBLANKH_REG             0x001B
  55 #define HBLANKL_REG             0x001C
  56 #define VSYNCH_REG              0x001D
  57 #define VSYNCL_REG              0x001E
  58 /* VSYNC control */
  59 #define VS_CTL_REG(n)           (0x00A1 + (n))
  60 /* page 1 */
  61 #define ISP_CTL_REG(n)          (0x0110 + (n))
  62 #define YOFS_REG                0x0119
  63 #define DARK_YOFS_REG           0x011A
  64 #define SAT_CTL_REG             0x0120
  65 #define BSAT_REG                0x0121
  66 #define RSAT_REG                0x0122
  67 /* Color correction */
  68 #define CMC_CTL_REG             0x0130
  69 #define CMC_OFSGH_REG           0x0133
  70 #define CMC_OFSGL_REG           0x0135
  71 #define CMC_SIGN_REG            0x0136
  72 #define CMC_GOFS_REG            0x0137
  73 #define CMC_COEF_REG(n)         (0x0138 + (n))
  74 #define CMC_OFS_REG(n)          (0x0141 + (n))
  75 /* Gamma correction */
  76 #define GMA_CTL_REG             0x0160
  77 #define GMA_COEF_REG(n)         (0x0161 + (n))
  78 /* Lens Shading */
  79 #define LENS_CTRL_REG           0x01D0
  80 #define LENS_XCEN_REG           0x01D1
  81 #define LENS_YCEN_REG           0x01D2
  82 #define LENS_RC_REG             0x01D3
  83 #define LENS_GC_REG             0x01D4
  84 #define LENS_BC_REG             0x01D5
  85 #define L_AGON_REG              0x01D6
  86 #define L_AGOFF_REG             0x01D7
  87 /* Page 3 - Auto Exposure */
  88 #define AE_CTL_REG(n)           (0x0310 + (n))
  89 #define AE_CTL9_REG             0x032C
  90 #define AE_CTL10_REG            0x032D
  91 #define AE_YLVL_REG             0x031C
  92 #define AE_YTH_REG(n)           (0x031D + (n))
  93 #define AE_WGT_REG              0x0326
  94 #define EXP_TIMEH_REG           0x0333
  95 #define EXP_TIMEM_REG           0x0334
  96 #define EXP_TIMEL_REG           0x0335
  97 #define EXP_MMINH_REG           0x0336
  98 #define EXP_MMINL_REG           0x0337
  99 #define EXP_MMAXH_REG           0x0338
 100 #define EXP_MMAXM_REG           0x0339
 101 #define EXP_MMAXL_REG           0x033A
 102 /* Page 4 - Auto White Balance */
 103 #define AWB_CTL_REG(n)          (0x0410 + (n))
 104 #define AWB_ENABE               0x80
 105 #define AWB_WGHT_REG            0x0419
 106 #define BGAIN_PAR_REG(n)        (0x044F + (n))
 107 /* Manual white balance, when AWB_CTL2[0]=1 */
 108 #define MWB_RGAIN_REG           0x0466
 109 #define MWB_BGAIN_REG           0x0467
 110
 111 /* The token to mark an array end */
 112 #define REG_TERM                0xFFFF
 113
 114 struct noon010_format {
 115         enum v4l2_mbus_pixelcode code;
 116         enum v4l2_colorspace colorspace;
 117         u16 ispctl1_reg;
 118 };
 119
 120 struct noon010_frmsize {
 121         u16 width;
 122         u16 height;
 123         int vid_ctl1;
 124 };
 125
 126 static const char * const noon010_supply_name[] = {
 127         "vdd_core", "vddio", "vdda"
 128 };
 129
 130 #define NOON010_NUM_SUPPLIES ARRAY_SIZE(noon010_supply_name)
 131
 132 struct noon010_info {
 133         struct v4l2_subdev sd;
 134         struct v4l2_ctrl_handler hdl;
 135         const struct noon010pc30_platform_data *pdata;
 136         const struct noon010_format *curr_fmt;
 137         const struct noon010_frmsize *curr_win;
 138         unsigned int hflip:1;
 139         unsigned int vflip:1;
 140         unsigned int power:1;
 141         u8 i2c_reg_page;
 142         struct regulator_bulk_data supply[NOON010_NUM_SUPPLIES];
 143         u32 gpio_nreset;
 144         u32 gpio_nstby;
 145 };
 146
 147 struct i2c_regval {
 148         u16 addr;
 149         u16 val;
 150 };
 151
 152 /* Supported resolutions. */
 153 static const struct noon010_frmsize noon010_sizes[] = {
 154         {
 155                 .width          = 352,
 156                 .height         = 288,
 157                 .vid_ctl1       = 0,
 158         }, {
 159                 .width          = 176,
 160                 .height         = 144,
 161                 .vid_ctl1       = 0x10,
 162         }, {
 163                 .width          = 88,
 164                 .height         = 72,
 165                 .vid_ctl1       = 0x20,
 166         },
 167 };
 168
 169 /* Supported pixel formats. */
 170 static const struct noon010_format noon010_formats[] = {
 171         {
 172                 .code           = V4L2_MBUS_FMT_YUYV8_2X8,
 173                 .colorspace     = V4L2_COLORSPACE_JPEG,
 174                 .ispctl1_reg    = 0x03,
 175         }, {
 176                 .code           = V4L2_MBUS_FMT_YVYU8_2X8,
 177                 .colorspace     = V4L2_COLORSPACE_JPEG,
 178                 .ispctl1_reg    = 0x02,
 179         }, {
 180                 .code           = V4L2_MBUS_FMT_VYUY8_2X8,
 181                 .colorspace     = V4L2_COLORSPACE_JPEG,
 182                 .ispctl1_reg    = 0,
 183         }, {
 184                 .code           = V4L2_MBUS_FMT_UYVY8_2X8,
 185                 .colorspace     = V4L2_COLORSPACE_JPEG,
 186                 .ispctl1_reg    = 0x01,
 187         }, {
 188                 .code           = V4L2_MBUS_FMT_RGB565_2X8_BE,
 189                 .colorspace     = V4L2_COLORSPACE_JPEG,
 190                 .ispctl1_reg    = 0x40,
 191         },
 192 };
 193
 194 static const struct i2c_regval noon010_base_regs[] = {
 195         { WIN_COLL_REG,         0x06 }, { HBLANKL_REG,          0x7C },
 196         /* Color corection and saturation */
 197         { ISP_CTL_REG(0),       0x30 }, { ISP_CTL_REG(2),       0x30 },
 198         { YOFS_REG,             0x80 }, { DARK_YOFS_REG,        0x04 },
 199         { SAT_CTL_REG,          0x1F }, { BSAT_REG,             0x90 },
 200         { CMC_CTL_REG,          0x0F }, { CMC_OFSGH_REG,        0x3C },
 201         { CMC_OFSGL_REG,        0x2C }, { CMC_SIGN_REG,         0x3F },
 202         { CMC_COEF_REG(0),      0x79 }, { CMC_OFS_REG(0),       0x00 },
 203         { CMC_COEF_REG(1),      0x39 }, { CMC_OFS_REG(1),       0x00 },
 204         { CMC_COEF_REG(2),      0x00 }, { CMC_OFS_REG(2),       0x00 },
 205         { CMC_COEF_REG(3),      0x11 }, { CMC_OFS_REG(3),       0x8B },
 206         { CMC_COEF_REG(4),      0x65 }, { CMC_OFS_REG(4),       0x07 },
 207         { CMC_COEF_REG(5),      0x14 }, { CMC_OFS_REG(5),       0x04 },
 208         { CMC_COEF_REG(6),      0x01 }, { CMC_OFS_REG(6),       0x9C },
 209         { CMC_COEF_REG(7),      0x33 }, { CMC_OFS_REG(7),       0x89 },
 210         { CMC_COEF_REG(8),      0x74 }, { CMC_OFS_REG(8),       0x25 },
 211         /* Automatic white balance */
 212         { AWB_CTL_REG(0),       0x78 }, { AWB_CTL_REG(1),       0x2E },
 213         { AWB_CTL_REG(2),       0x20 }, { AWB_CTL_REG(3),       0x85 },
 214         /* Auto exposure */
 215         { AE_CTL_REG(0),        0xDC }, { AE_CTL_REG(1),        0x81 },
 216         { AE_CTL_REG(2),        0x30 }, { AE_CTL_REG(3),        0xA5 },
 217         { AE_CTL_REG(4),        0x40 }, { AE_CTL_REG(5),        0x51 },
 218         { AE_CTL_REG(6),        0x33 }, { AE_CTL_REG(7),        0x7E },
 219         { AE_CTL9_REG,          0x00 }, { AE_CTL10_REG,         0x02 },
 220         { AE_YLVL_REG,          0x44 }, { AE_YTH_REG(0),        0x34 },
 221         { AE_YTH_REG(1),        0x30 }, { AE_WGT_REG,           0xD5 },
 222         /* Lens shading compensation */
 223         { LENS_CTRL_REG,        0x01 }, { LENS_XCEN_REG,        0x80 },
 224         { LENS_YCEN_REG,        0x70 }, { LENS_RC_REG,          0x53 },
 225         { LENS_GC_REG,          0x40 }, { LENS_BC_REG,          0x3E },
 226         { REG_TERM,             0 },
 227 };
 228
 229 static inline struct noon010_info *to_noon010(struct v4l2_subdev *sd)
 230 {
 231         return container_of(sd, struct noon010_info, sd);
 232 }
 233
 234 static inline struct v4l2_subdev *to_sd(struct v4l2_ctrl *ctrl)
 235 {
 236         return &container_of(ctrl->handler, struct noon010_info, hdl)->sd;
 237 }
 238
 239 static inline int set_i2c_page(struct noon010_info *info,
 240                                struct i2c_client *client, unsigned int reg)
 241 {
 242         u32 page = reg >> 8 & 0xFF;
 243         int ret = 0;
 244
 245         if (info->i2c_reg_page != page && (reg & 0xFF) != 0x03) {
 246                 ret = i2c_smbus_write_byte_data(client, PAGEMODE_REG, page);
 247                 if (!ret)
 248                         info->i2c_reg_page = page;
 249         }
 250         return ret;
 251 }
 252
 253 static int cam_i2c_read(struct v4l2_subdev *sd, u32 reg_addr)
 254 {
 255         struct i2c_client *client = v4l2_get_subdevdata(sd);
 256         struct noon010_info *info = to_noon010(sd);
 257         int ret = set_i2c_page(info, client, reg_addr);
 258
 259         if (ret)
 260                 return ret;
 261         return i2c_smbus_read_byte_data(client, reg_addr & 0xFF);
 262 }
 263
 264 static int cam_i2c_write(struct v4l2_subdev *sd, u32 reg_addr, u32 val)
 265 {
 266         struct i2c_client *client = v4l2_get_subdevdata(sd);
 267         struct noon010_info *info = to_noon010(sd);
 268         int ret = set_i2c_page(info, client, reg_addr);
 269
 270         if (ret)
 271                 return ret;
 272         return i2c_smbus_write_byte_data(client, reg_addr & 0xFF, val);
 273 }
 274
 275 static inline int noon010_bulk_write_reg(struct v4l2_subdev *sd,
 276                                          const struct i2c_regval *msg)
 277 {
 278         while (msg->addr != REG_TERM) {
 279                 int ret = cam_i2c_write(sd, msg->addr, msg->val);
 280
 281                 if (ret)
 282                         return ret;
 283                 msg++;
 284         }
 285         return 0;
 286 }
 287
 288 /* Device reset and sleep mode control */
 289 static int noon010_power_ctrl(struct v4l2_subdev *sd, bool reset, bool sleep)
 290 {
 291         struct noon010_info *info = to_noon010(sd);
 292         u8 reg = sleep ? 0xF1 : 0xF0;
 293         int ret = 0;
 294
 295         if (reset)
 296                 ret = cam_i2c_write(sd, POWER_CTRL_REG, reg | 0x02);
 297         if (!ret) {
 298                 ret = cam_i2c_write(sd, POWER_CTRL_REG, reg);
 299                 if (reset && !ret)
 300                         info->i2c_reg_page = -1;
 301         }
 302         return ret;
 303 }
 304
 305 /* Automatic white balance control */
 306 static int noon010_enable_autowhitebalance(struct v4l2_subdev *sd, int on)
 307 {
 308         int ret;
 309
 310         ret = cam_i2c_write(sd, AWB_CTL_REG(1), on ? 0x2E : 0x2F);
 311         if (!ret)
 312                 ret = cam_i2c_write(sd, AWB_CTL_REG(0), on ? 0xFB : 0x7B);
 313         return ret;
 314 }
 315
 316 static int noon010_set_flip(struct v4l2_subdev *sd, int hflip, int vflip)
 317 {
 318         struct noon010_info *info = to_noon010(sd);
 319         int reg, ret;
 320
 321         reg = cam_i2c_read(sd, VDO_CTL_REG(1));
 322         if (reg < 0)
 323                 return reg;
 324
 325         reg &= 0x7C;
 326         if (hflip)
 327                 reg |= 0x01;
 328         if (vflip)
 329                 reg |= 0x02;
 330
 331         ret = cam_i2c_write(sd, VDO_CTL_REG(1), reg | 0x80);
 332         if (!ret) {
 333                 info->hflip = hflip;
 334                 info->vflip = vflip;
 335         }
 336         return ret;
 337 }
 338
 339 /* Configure resolution and color format */
 340 static int noon010_set_params(struct v4l2_subdev *sd)
 341 {
 342         struct noon010_info *info = to_noon010(sd);
 343         int ret;
 344
 345         if (!info->curr_win)
 346                 return -EINVAL;
 347
 348         ret = cam_i2c_write(sd, VDO_CTL_REG(0), info->curr_win->vid_ctl1);
 349
 350         if (!ret && info->curr_fmt)
 351                 ret = cam_i2c_write(sd, ISP_CTL_REG(0),
 352                                 info->curr_fmt->ispctl1_reg);
 353         return ret;
 354 }
 355
 356 /* Find nearest matching image pixel size. */
 357 static int noon010_try_frame_size(struct v4l2_mbus_framefmt *mf)
 358 {
 359         unsigned int min_err = ~0;
 360         int i = ARRAY_SIZE(noon010_sizes);
 361         const struct noon010_frmsize *fsize = &noon010_sizes[0],
 362                 *match = NULL;
 363
 364         while (i--) {
 365                 int err = abs(fsize->width - mf->width)
 366                                 + abs(fsize->height - mf->height);
 367
 368                 if (err < min_err) {
 369                         min_err = err;
 370                         match = fsize;
 371                 }
 372                 fsize++;
 373         }
 374         if (match) {
 375                 mf->width  = match->width;
 376                 mf->height = match->height;
 377                 return 0;
 378         }
 379         return -EINVAL;
 380 }
 381
 382 static int power_enable(struct noon010_info *info)
 383 {
 384         int ret;
 385
 386         if (info->power) {
 387                 v4l2_info(&info->sd, "%s: sensor is already on\n", __func__);
 388                 return 0;
 389         }
 390
 391         if (gpio_is_valid(info->gpio_nstby))
 392                 gpio_set_value(info->gpio_nstby, 0);
 393
 394         if (gpio_is_valid(info->gpio_nreset))
 395                 gpio_set_value(info->gpio_nreset, 0);
 396
 397         ret = regulator_bulk_enable(NOON010_NUM_SUPPLIES, info->supply);
 398         if (ret)
 399                 return ret;
 400
 401         if (gpio_is_valid(info->gpio_nreset)) {
 402                 msleep(50);
 403                 gpio_set_value(info->gpio_nreset, 1);
 404         }
 405         if (gpio_is_valid(info->gpio_nstby)) {
 406                 udelay(1000);
 407                 gpio_set_value(info->gpio_nstby, 1);
 408         }
 409         if (gpio_is_valid(info->gpio_nreset)) {
 410                 udelay(1000);
 411                 gpio_set_value(info->gpio_nreset, 0);
 412                 msleep(100);
 413                 gpio_set_value(info->gpio_nreset, 1);
 414                 msleep(20);
 415         }
 416         info->power = 1;
 417
 418         v4l2_dbg(1, debug, &info->sd,  "%s: sensor is on\n", __func__);
 419         return 0;
 420 }
 421
 422 static int power_disable(struct noon010_info *info)
 423 {
 424         int ret;
 425
 426         if (!info->power) {
 427                 v4l2_info(&info->sd, "%s: sensor is already off\n", __func__);
 428                 return 0;
 429         }
 430
 431         ret = regulator_bulk_disable(NOON010_NUM_SUPPLIES, info->supply);
 432         if (ret)
 433                 return ret;
 434
 435         if (gpio_is_valid(info->gpio_nstby))
 436                 gpio_set_value(info->gpio_nstby, 0);
 437
 438         if (gpio_is_valid(info->gpio_nreset))
 439                 gpio_set_value(info->gpio_nreset, 0);
 440
 441         info->power = 0;
 442
 443         v4l2_dbg(1, debug, &info->sd,  "%s: sensor is off\n", __func__);
 444
 445         return 0;
 446 }
 447
 448 static int noon010_s_ctrl(struct v4l2_ctrl *ctrl)
 449 {
 450         struct v4l2_subdev *sd = to_sd(ctrl);
 451
 452         v4l2_dbg(1, debug, sd, "%s: ctrl_id: %d, value: %d\n",
 453                  __func__, ctrl->id, ctrl->val);
 454
 455         switch (ctrl->id) {
 456         case V4L2_CID_AUTO_WHITE_BALANCE:
 457                 return noon010_enable_autowhitebalance(sd, ctrl->val);
 458         case V4L2_CID_BLUE_BALANCE:
 459                 return cam_i2c_write(sd, MWB_BGAIN_REG, ctrl->val);
 460         case V4L2_CID_RED_BALANCE:
 461                 return cam_i2c_write(sd, MWB_RGAIN_REG, ctrl->val);
 462         default:
 463                 return -EINVAL;
 464         }
 465 }
 466
 467 static int noon010_enum_fmt(struct v4l2_subdev *sd, unsigned int index,
 468                             enum v4l2_mbus_pixelcode *code)
 469 {
 470         if (!code || index >= ARRAY_SIZE(noon010_formats))
 471                 return -EINVAL;
 472
 473         *code = noon010_formats[index].code;
 474         return 0;
 475 }
 476
 477 static int noon010_g_fmt(struct v4l2_subdev *sd, struct v4l2_mbus_framefmt *mf)
 478 {
 479         struct noon010_info *info = to_noon010(sd);
 480         int ret;
 481
 482         if (!mf)
 483                 return -EINVAL;
 484
 485         if (!info->curr_win || !info->curr_fmt) {
 486                 ret = noon010_set_params(sd);
 487                 if (ret)
 488                         return ret;
 489         }
 490
 491         mf->width       = info->curr_win->width;
 492         mf->height      = info->curr_win->height;
 493         mf->code        = info->curr_fmt->code;
 494         mf->colorspace  = info->curr_fmt->colorspace;
 495         mf->field       = V4L2_FIELD_NONE;
 496
 497         return 0;
 498 }
 499
 500 /* Return nearest media bus frame format. */
 501 static const struct noon010_format *try_fmt(struct v4l2_subdev *sd,
 502                                             struct v4l2_mbus_framefmt *mf)
 503 {
 504         int i = ARRAY_SIZE(noon010_formats);
 505
 506         noon010_try_frame_size(mf);
 507
 508         while (i--)
 509                 if (mf->code == noon010_formats[i].code)
 510                         break;
 511
 512         mf->code = noon010_formats[i].code;
 513
 514         return &noon010_formats[i];
 515 }
 516
 517 static int noon010_try_fmt(struct v4l2_subdev *sd,
 518                            struct v4l2_mbus_framefmt *mf)
 519 {
 520         if (!sd || !mf)
 521                 return -EINVAL;
 522
 523         try_fmt(sd, mf);
 524         return 0;
 525 }
 526
 527 static int noon010_s_fmt(struct v4l2_subdev *sd,
 528                          struct v4l2_mbus_framefmt *mf)
 529 {
 530         struct noon010_info *info = to_noon010(sd);
 531
 532         if (!sd || !mf)
 533                 return -EINVAL;
 534
 535         info->curr_fmt = try_fmt(sd, mf);
 536
 537         return noon010_set_params(sd);
 538 }
 539
 540 static int noon010_base_config(struct v4l2_subdev *sd)
 541 {
 542         struct noon010_info *info = to_noon010(sd);
 543         int ret;
 544
 545         ret = noon010_bulk_write_reg(sd, noon010_base_regs);
 546         if (!ret) {
 547                 info->curr_fmt = &noon010_formats[0];
 548                 info->curr_win = &noon010_sizes[0];
 549                 ret = noon010_set_params(sd);
 550         }
 551         if (!ret)
 552                 ret = noon010_set_flip(sd, 1, 0);
 553         if (!ret)
 554                 ret = noon010_power_ctrl(sd, false, false);
 555
 556         /* sync the handler and the registers state */
 557         v4l2_ctrl_handler_setup(&to_noon010(sd)->hdl);
 558         return ret;
 559 }
 560
 561 static int noon010_s_power(struct v4l2_subdev *sd, int on)
 562 {
 563         struct noon010_info *info = to_noon010(sd);
 564         const struct noon010pc30_platform_data *pdata = info->pdata;
 565         int ret = 0;
 566
 567         if (WARN(pdata == NULL, "No platform data!\n"))
 568                 return -ENOMEM;
 569
 570         if (on) {
 571                 ret = power_enable(info);
 572                 if (ret)
 573                         return ret;
 574                 ret = noon010_base_config(sd);
 575         } else {
 576                 noon010_power_ctrl(sd, false, true);
 577                 ret = power_disable(info);
 578                 info->curr_win = NULL;
 579                 info->curr_fmt = NULL;
 580         }
 581
 582         return ret;
 583 }
 584
 585 static int noon010_g_chip_ident(struct v4l2_subdev *sd,
 586                                 struct v4l2_dbg_chip_ident *chip)
 587 {
 588         struct i2c_client *client = v4l2_get_subdevdata(sd);
 589
 590         return v4l2_chip_ident_i2c_client(client, chip,
 591                                           V4L2_IDENT_NOON010PC30, 0);
 592 }
 593
 594 static int noon010_log_status(struct v4l2_subdev *sd)
 595 {
 596         struct noon010_info *info = to_noon010(sd);
 597
 598         v4l2_ctrl_handler_log_status(&info->hdl, sd->name);
 599         return 0;
 600 }
 601
 602 static const struct v4l2_ctrl_ops noon010_ctrl_ops = {
 603         .s_ctrl = noon010_s_ctrl,
 604 };
 605
 606 static const struct v4l2_subdev_core_ops noon010_core_ops = {
 607         .g_chip_ident   = noon010_g_chip_ident,
 608         .s_power        = noon010_s_power,
 609         .g_ctrl         = v4l2_subdev_g_ctrl,
 610         .s_ctrl         = v4l2_subdev_s_ctrl,
 611         .queryctrl      = v4l2_subdev_queryctrl,
 612         .querymenu      = v4l2_subdev_querymenu,
 613         .g_ext_ctrls    = v4l2_subdev_g_ext_ctrls,
 614         .try_ext_ctrls  = v4l2_subdev_try_ext_ctrls,
 615         .s_ext_ctrls    = v4l2_subdev_s_ext_ctrls,
 616         .log_status     = noon010_log_status,
 617 };
 618
 619 static const struct v4l2_subdev_video_ops noon010_video_ops = {
 620         .g_mbus_fmt     = noon010_g_fmt,
 621         .s_mbus_fmt     = noon010_s_fmt,
 622         .try_mbus_fmt   = noon010_try_fmt,
 623         .enum_mbus_fmt  = noon010_enum_fmt,
 624 };
 625
 626 static const struct v4l2_subdev_ops noon010_ops = {
 627         .core   = &noon010_core_ops,
 628         .video  = &noon010_video_ops,
 629 };
 630
 631 /* Return 0 if NOON010PC30L sensor type was detected or -ENODEV otherwise. */
 632 static int noon010_detect(struct i2c_client *client, struct noon010_info *info)
 633 {
 634         int ret;
 635
 636         ret = power_enable(info);
 637         if (ret)
 638                 return ret;
 639
 640         ret = i2c_smbus_read_byte_data(client, DEVICE_ID_REG);
 641         if (ret < 0)
 642                 dev_err(&client->dev, "I2C read failed: 0x%X\n", ret);
 643
 644         power_disable(info);
 645
 646         return ret == NOON010PC30_ID ? 0 : -ENODEV;
 647 }
 648
 649 static int noon010_probe(struct i2c_client *client,
 650                          const struct i2c_device_id *id)
 651 {
 652         struct noon010_info *info;
 653         struct v4l2_subdev *sd;
 654         const struct noon010pc30_platform_data *pdata
 655                 = client->dev.platform_data;
 656         int ret;
 657         int i;
 658
 659         if (!pdata) {
 660                 dev_err(&client->dev, "No platform data!\n");
 661                 return -EIO;
 662         }
 663
 664         info = kzalloc(sizeof(*info), GFP_KERNEL);
 665         if (!info)
 666                 return -ENOMEM;
 667
 668         sd = &info->sd;
 669         strlcpy(sd->name, MODULE_NAME, sizeof(sd->name));
 670         v4l2_i2c_subdev_init(sd, client, &noon010_ops);
 671
 672         v4l2_ctrl_handler_init(&info->hdl, 3);
 673
 674         v4l2_ctrl_new_std(&info->hdl, &noon010_ctrl_ops,
 675                           V4L2_CID_AUTO_WHITE_BALANCE, 0, 1, 1, 1);
 676         v4l2_ctrl_new_std(&info->hdl, &noon010_ctrl_ops,
 677                           V4L2_CID_RED_BALANCE, 0, 127, 1, 64);
 678         v4l2_ctrl_new_std(&info->hdl, &noon010_ctrl_ops,
 679                           V4L2_CID_BLUE_BALANCE, 0, 127, 1, 64);
 680
 681         sd->ctrl_handler = &info->hdl;
 682
 683         ret = info->hdl.error;
 684         if (ret)
 685                 goto np_err;
 686
 687         info->pdata             = client->dev.platform_data;
 688         info->i2c_reg_page      = -1;
 689         info->gpio_nreset       = -EINVAL;
 690         info->gpio_nstby        = -EINVAL;
 691
 692         if (gpio_is_valid(pdata->gpio_nreset)) {
 693                 ret = gpio_request(pdata->gpio_nreset, "NOON010PC30 NRST");
 694                 if (ret) {
 695                         dev_err(&client->dev, "GPIO request error: %d\n", ret);
 696                         goto np_err;
 697                 }
 698                 info->gpio_nreset = pdata->gpio_nreset;
 699                 gpio_direction_output(info->gpio_nreset, 0);
 700                 gpio_export(info->gpio_nreset, 0);
 701         }
 702
 703         if (gpio_is_valid(pdata->gpio_nstby)) {
 704                 ret = gpio_request(pdata->gpio_nstby, "NOON010PC30 NSTBY");
 705                 if (ret) {
 706                         dev_err(&client->dev, "GPIO request error: %d\n", ret);
 707                         goto np_gpio_err;
 708                 }
 709                 info->gpio_nstby = pdata->gpio_nstby;
 710                 gpio_direction_output(info->gpio_nstby, 0);
 711                 gpio_export(info->gpio_nstby, 0);
 712         }
 713
 714         for (i = 0; i < NOON010_NUM_SUPPLIES; i++)
 715                 info->supply[i].supply = noon010_supply_name[i];
 716
 717         ret = regulator_bulk_get(&client->dev, NOON010_NUM_SUPPLIES,
 718                                  info->supply);
 719         if (ret)
 720                 goto np_reg_err;
 721
 722         ret = noon010_detect(client, info);
 723         if (!ret)
 724                 return 0;
 725
 726         /* the sensor detection failed */
 727         regulator_bulk_free(NOON010_NUM_SUPPLIES, info->supply);
 728 np_reg_err:
 729         if (gpio_is_valid(info->gpio_nstby))
 730                 gpio_free(info->gpio_nstby);
 731 np_gpio_err:
 732         if (gpio_is_valid(info->gpio_nreset))
 733                 gpio_free(info->gpio_nreset);
 734 np_err:
 735         v4l2_ctrl_handler_free(&info->hdl);
 736         v4l2_device_unregister_subdev(sd);
 737         kfree(info);
 738         return ret;
 739 }
 740
 741 static int noon010_remove(struct i2c_client *client)
 742 {
 743         struct v4l2_subdev *sd = i2c_get_clientdata(client);
 744         struct noon010_info *info = to_noon010(sd);
 745
 746         v4l2_device_unregister_subdev(sd);
 747         v4l2_ctrl_handler_free(&info->hdl);
 748
 749         regulator_bulk_free(NOON010_NUM_SUPPLIES, info->supply);
 750
 751         if (gpio_is_valid(info->gpio_nreset))
 752                 gpio_free(info->gpio_nreset);
 753
 754         if (gpio_is_valid(info->gpio_nstby))
 755                 gpio_free(info->gpio_nstby);
 756
 757         kfree(info);
 758         return 0;
 759 }
 760
 761 static const struct i2c_device_id noon010_id[] = {
 762         { MODULE_NAME, 0 },
 763         { },
 764 };
 765 MODULE_DEVICE_TABLE(i2c, noon010_id);
 766
 767
 768 static struct i2c_driver noon010_i2c_driver = {
 769         .driver = {
 770                 .name = MODULE_NAME
 771         },
 772         .probe          = noon010_probe,
 773         .remove         = noon010_remove,
 774         .id_table       = noon010_id,
 775 };
 776
 777 static int __init noon010_init(void)
 778 {
 779         return i2c_add_driver(&noon010_i2c_driver);
 780 }
 781
 782 static void __exit noon010_exit(void)
 783 {
 784         i2c_del_driver(&noon010_i2c_driver);
 785 }
 786
 787 module_init(noon010_init);
 788 module_exit(noon010_exit);
 789
 790 MODULE_DESCRIPTION("Siliconfile NOON010PC30 camera driver");
 791 MODULE_AUTHOR("Sylwester Nawrocki <s.nawrocki@samsung.com>");
 792 MODULE_LICENSE("GPL");