drivers/media/i2c/noon010pc30.c

   1 /*
   2  * Driver for SiliconFile NOON010PC30 CIF (1/11") Image Sensor with ISP
   3  *
   4  * Copyright (C) 2010 - 2011 Samsung Electronics Co., Ltd.
   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 version.
  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 <linux/module.h>
  25 #include <media/v4l2-ctrls.h>
  26 #include <media/v4l2-device.h>
  27 #include <media/v4l2-mediabus.h>
  28 #include <media/v4l2-subdev.h>
  29
  30 static int debug;
  31 module_param(debug, int, 0644);
  32 MODULE_PARM_DESC(debug, "Enable module debug trace. Set to 1 to enable.");
  33
  34 #define MODULE_NAME             "NOON010PC30"
  35
  36 /*
  37  * Register offsets within a page
  38  * b15..b8 - page id, b7..b0 - register address
  39  */
  40 #define POWER_CTRL_REG          0x0001
  41 #define PAGEMODE_REG            0x03
  42 #define DEVICE_ID_REG           0x0004
  43 #define NOON010PC30_ID          0x86
  44 #define VDO_CTL_REG(n)          (0x0010 + (n))
  45 #define SYNC_CTL_REG            0x0012
  46 /* Window size and position */
  47 #define WIN_ROWH_REG            0x0013
  48 #define WIN_ROWL_REG            0x0014
  49 #define WIN_COLH_REG            0x0015
  50 #define WIN_COLL_REG            0x0016
  51 #define WIN_HEIGHTH_REG         0x0017
  52 #define WIN_HEIGHTL_REG         0x0018
  53 #define WIN_WIDTHH_REG          0x0019
  54 #define WIN_WIDTHL_REG          0x001A
  55 #define HBLANKH_REG             0x001B
  56 #define HBLANKL_REG             0x001C
  57 #define VSYNCH_REG              0x001D
  58 #define VSYNCL_REG              0x001E
  59 /* VSYNC control */
  60 #define VS_CTL_REG(n)           (0x00A1 + (n))
  61 /* page 1 */
  62 #define ISP_CTL_REG(n)          (0x0110 + (n))
  63 #define YOFS_REG                0x0119
  64 #define DARK_YOFS_REG           0x011A
  65 #define SAT_CTL_REG             0x0120
  66 #define BSAT_REG                0x0121
  67 #define RSAT_REG                0x0122
  68 /* Color correction */
  69 #define CMC_CTL_REG             0x0130
  70 #define CMC_OFSGH_REG           0x0133
  71 #define CMC_OFSGL_REG           0x0135
  72 #define CMC_SIGN_REG            0x0136
  73 #define CMC_GOFS_REG            0x0137
  74 #define CMC_COEF_REG(n)         (0x0138 + (n))
  75 #define CMC_OFS_REG(n)          (0x0141 + (n))
  76 /* Gamma correction */
  77 #define GMA_CTL_REG             0x0160
  78 #define GMA_COEF_REG(n)         (0x0161 + (n))
  79 /* Lens Shading */
  80 #define LENS_CTRL_REG           0x01D0
  81 #define LENS_XCEN_REG           0x01D1
  82 #define LENS_YCEN_REG           0x01D2
  83 #define LENS_RC_REG             0x01D3
  84 #define LENS_GC_REG             0x01D4
  85 #define LENS_BC_REG             0x01D5
  86 #define L_AGON_REG              0x01D6
  87 #define L_AGOFF_REG             0x01D7
  88 /* Page 3 - Auto Exposure */
  89 #define AE_CTL_REG(n)           (0x0310 + (n))
  90 #define AE_CTL9_REG             0x032C
  91 #define AE_CTL10_REG            0x032D
  92 #define AE_YLVL_REG             0x031C
  93 #define AE_YTH_REG(n)           (0x031D + (n))
  94 #define AE_WGT_REG              0x0326
  95 #define EXP_TIMEH_REG           0x0333
  96 #define EXP_TIMEM_REG           0x0334
  97 #define EXP_TIMEL_REG           0x0335
  98 #define EXP_MMINH_REG           0x0336
  99 #define EXP_MMINL_REG           0x0337
 100 #define EXP_MMAXH_REG           0x0338
 101 #define EXP_MMAXM_REG           0x0339
 102 #define EXP_MMAXL_REG           0x033A
 103 /* Page 4 - Auto White Balance */
 104 #define AWB_CTL_REG(n)          (0x0410 + (n))
 105 #define AWB_ENABE               0x80
 106 #define AWB_WGHT_REG            0x0419
 107 #define BGAIN_PAR_REG(n)        (0x044F + (n))
 108 /* Manual white balance, when AWB_CTL2[0]=1 */
 109 #define MWB_RGAIN_REG           0x0466
 110 #define MWB_BGAIN_REG           0x0467
 111
 112 /* The token to mark an array end */
 113 #define REG_TERM                0xFFFF
 114
 115 struct noon010_format {
 116         enum v4l2_mbus_pixelcode code;
 117         enum v4l2_colorspace colorspace;
 118         u16 ispctl1_reg;
 119 };
 120
 121 struct noon010_frmsize {
 122         u16 width;
 123         u16 height;
 124         int vid_ctl1;
 125 };
 126
 127 static const char * const noon010_supply_name[] = {
 128         "vdd_core", "vddio", "vdda"
 129 };
 130
 131 #define NOON010_NUM_SUPPLIES ARRAY_SIZE(noon010_supply_name)
 132
 133 struct noon010_info {
 134         struct v4l2_subdev sd;
 135         struct media_pad pad;
 136         struct v4l2_ctrl_handler hdl;
 137         struct regulator_bulk_data supply[NOON010_NUM_SUPPLIES];
 138         u32 gpio_nreset;
 139         u32 gpio_nstby;
 140
 141         /* Protects the struct members below */
 142         struct mutex lock;
 143
 144         const struct noon010_format *curr_fmt;
 145         const struct noon010_frmsize *curr_win;
 146         unsigned int apply_new_cfg:1;
 147         unsigned int streaming:1;
 148         unsigned int hflip:1;
 149         unsigned int vflip:1;
 150         unsigned int power:1;
 151         u8 i2c_reg_page;
 152 };
 153
 154 struct i2c_regval {
 155         u16 addr;
 156         u16 val;
 157 };
 158
 159 /* Supported resolutions. */
 160 static const struct noon010_frmsize noon010_sizes[] = {
 161         {
 162                 .width          = 352,
 163                 .height         = 288,
 164                 .vid_ctl1       = 0,
 165         }, {
 166                 .width          = 176,
 167                 .height         = 144,
 168                 .vid_ctl1       = 0x10,
 169         }, {
 170                 .width          = 88,
 171                 .height         = 72,
 172                 .vid_ctl1       = 0x20,
 173         },
 174 };
 175
 176 /* Supported pixel formats. */
 177 static const struct noon010_format noon010_formats[] = {
 178         {
 179                 .code           = V4L2_MBUS_FMT_YUYV8_2X8,
 180                 .colorspace     = V4L2_COLORSPACE_JPEG,
 181                 .ispctl1_reg    = 0x03,
 182         }, {
 183                 .code           = V4L2_MBUS_FMT_YVYU8_2X8,
 184                 .colorspace     = V4L2_COLORSPACE_JPEG,
 185                 .ispctl1_reg    = 0x02,
 186         }, {
 187                 .code           = V4L2_MBUS_FMT_VYUY8_2X8,
 188                 .colorspace     = V4L2_COLORSPACE_JPEG,
 189                 .ispctl1_reg    = 0,
 190         }, {
 191                 .code           = V4L2_MBUS_FMT_UYVY8_2X8,
 192                 .colorspace     = V4L2_COLORSPACE_JPEG,
 193                 .ispctl1_reg    = 0x01,
 194         }, {
 195                 .code           = V4L2_MBUS_FMT_RGB565_2X8_BE,
 196                 .colorspace     = V4L2_COLORSPACE_JPEG,
 197                 .ispctl1_reg    = 0x40,
 198         },
 199 };
 200
 201 static const struct i2c_regval noon010_base_regs[] = {
 202         { WIN_COLL_REG,         0x06 }, { HBLANKL_REG,          0x7C },
 203         /* Color corection and saturation */
 204         { ISP_CTL_REG(0),       0x30 }, { ISP_CTL_REG(2),       0x30 },
 205         { YOFS_REG,             0x80 }, { DARK_YOFS_REG,        0x04 },
 206         { SAT_CTL_REG,          0x1F }, { BSAT_REG,             0x90 },
 207         { CMC_CTL_REG,          0x0F }, { CMC_OFSGH_REG,        0x3C },
 208         { CMC_OFSGL_REG,        0x2C }, { CMC_SIGN_REG,         0x3F },
 209         { CMC_COEF_REG(0),      0x79 }, { CMC_OFS_REG(0),       0x00 },
 210         { CMC_COEF_REG(1),      0x39 }, { CMC_OFS_REG(1),       0x00 },
 211         { CMC_COEF_REG(2),      0x00 }, { CMC_OFS_REG(2),       0x00 },
 212         { CMC_COEF_REG(3),      0x11 }, { CMC_OFS_REG(3),       0x8B },
 213         { CMC_COEF_REG(4),      0x65 }, { CMC_OFS_REG(4),       0x07 },
 214         { CMC_COEF_REG(5),      0x14 }, { CMC_OFS_REG(5),       0x04 },
 215         { CMC_COEF_REG(6),      0x01 }, { CMC_OFS_REG(6),       0x9C },
 216         { CMC_COEF_REG(7),      0x33 }, { CMC_OFS_REG(7),       0x89 },
 217         { CMC_COEF_REG(8),      0x74 }, { CMC_OFS_REG(8),       0x25 },
 218         /* Automatic white balance */
 219         { AWB_CTL_REG(0),       0x78 }, { AWB_CTL_REG(1),       0x2E },
 220         { AWB_CTL_REG(2),       0x20 }, { AWB_CTL_REG(3),       0x85 },
 221         /* Auto exposure */
 222         { AE_CTL_REG(0),        0xDC }, { AE_CTL_REG(1),        0x81 },
 223         { AE_CTL_REG(2),        0x30 }, { AE_CTL_REG(3),        0xA5 },
 224         { AE_CTL_REG(4),        0x40 }, { AE_CTL_REG(5),        0x51 },
 225         { AE_CTL_REG(6),        0x33 }, { AE_CTL_REG(7),        0x7E },
 226         { AE_CTL9_REG,          0x00 }, { AE_CTL10_REG,         0x02 },
 227         { AE_YLVL_REG,          0x44 }, { AE_YTH_REG(0),        0x34 },
 228         { AE_YTH_REG(1),        0x30 }, { AE_WGT_REG,           0xD5 },
 229         /* Lens shading compensation */
 230         { LENS_CTRL_REG,        0x01 }, { LENS_XCEN_REG,        0x80 },
 231         { LENS_YCEN_REG,        0x70 }, { LENS_RC_REG,          0x53 },
 232         { LENS_GC_REG,          0x40 }, { LENS_BC_REG,          0x3E },
 233         { REG_TERM,             0 },
 234 };
 235
 236 static inline struct noon010_info *to_noon010(struct v4l2_subdev *sd)
 237 {
 238         return container_of(sd, struct noon010_info, sd);
 239 }
 240
 241 static inline struct v4l2_subdev *to_sd(struct v4l2_ctrl *ctrl)
 242 {
 243         return &container_of(ctrl->handler, struct noon010_info, hdl)->sd;
 244 }
 245
 246 static inline int set_i2c_page(struct noon010_info *info,
 247                                struct i2c_client *client, unsigned int reg)
 248 {
 249         u32 page = reg >> 8 & 0xFF;
 250         int ret = 0;
 251
 252         if (info->i2c_reg_page != page && (reg & 0xFF) != 0x03) {
 253                 ret = i2c_smbus_write_byte_data(client, PAGEMODE_REG, page);
 254                 if (!ret)
 255                         info->i2c_reg_page = page;
 256         }
 257         return ret;
 258 }
 259
 260 static int cam_i2c_read(struct v4l2_subdev *sd, u32 reg_addr)
 261 {
 262         struct i2c_client *client = v4l2_get_subdevdata(sd);
 263         struct noon010_info *info = to_noon010(sd);
 264         int ret = set_i2c_page(info, client, reg_addr);
 265
 266         if (ret)
 267                 return ret;
 268         return i2c_smbus_read_byte_data(client, reg_addr & 0xFF);
 269 }
 270
 271 static int cam_i2c_write(struct v4l2_subdev *sd, u32 reg_addr, u32 val)
 272 {
 273         struct i2c_client *client = v4l2_get_subdevdata(sd);
 274         struct noon010_info *info = to_noon010(sd);
 275         int ret = set_i2c_page(info, client, reg_addr);
 276
 277         if (ret)
 278                 return ret;
 279         return i2c_smbus_write_byte_data(client, reg_addr & 0xFF, val);
 280 }
 281
 282 static inline int noon010_bulk_write_reg(struct v4l2_subdev *sd,
 283                                          const struct i2c_regval *msg)
 284 {
 285         while (msg->addr != REG_TERM) {
 286                 int ret = cam_i2c_write(sd, msg->addr, msg->val);
 287
 288                 if (ret)
 289                         return ret;
 290                 msg++;
 291         }
 292         return 0;
 293 }
 294
 295 /* Device reset and sleep mode control */
 296 static int noon010_power_ctrl(struct v4l2_subdev *sd, bool reset, bool sleep)
 297 {
 298         struct noon010_info *info = to_noon010(sd);
 299         u8 reg = sleep ? 0xF1 : 0xF0;
 300         int ret = 0;
 301
 302         if (reset) {
 303                 ret = cam_i2c_write(sd, POWER_CTRL_REG, reg | 0x02);
 304                 udelay(20);
 305         }
 306         if (!ret) {
 307                 ret = cam_i2c_write(sd, POWER_CTRL_REG, reg);
 308                 if (reset && !ret)
 309                         info->i2c_reg_page = -1;
 310         }
 311         return ret;
 312 }
 313
 314 /* Automatic white balance control */
 315 static int noon010_enable_autowhitebalance(struct v4l2_subdev *sd, int on)
 316 {
 317         int ret;
 318
 319         ret = cam_i2c_write(sd, AWB_CTL_REG(1), on ? 0x2E : 0x2F);
 320         if (!ret)
 321                 ret = cam_i2c_write(sd, AWB_CTL_REG(0), on ? 0xFB : 0x7B);
 322         return ret;
 323 }
 324
 325 /* Called with struct noon010_info.lock mutex held */
 326 static int noon010_set_flip(struct v4l2_subdev *sd, int hflip, int vflip)
 327 {
 328         struct noon010_info *info = to_noon010(sd);
 329         int reg, ret;
 330
 331         reg = cam_i2c_read(sd, VDO_CTL_REG(1));
 332         if (reg < 0)
 333                 return reg;
 334
 335         reg &= 0x7C;
 336         if (hflip)
 337                 reg |= 0x01;
 338         if (vflip)
 339                 reg |= 0x02;
 340
 341         ret = cam_i2c_write(sd, VDO_CTL_REG(1), reg | 0x80);
 342         if (!ret) {
 343                 info->hflip = hflip;
 344                 info->vflip = vflip;
 345         }
 346         return ret;
 347 }
 348
 349 /* Configure resolution and color format */
 350 static int noon010_set_params(struct v4l2_subdev *sd)
 351 {
 352         struct noon010_info *info = to_noon010(sd);
 353
 354         int ret = cam_i2c_write(sd, VDO_CTL_REG(0),
 355                                 info->curr_win->vid_ctl1);
 356         if (ret)
 357                 return ret;
 358         return cam_i2c_write(sd, ISP_CTL_REG(0),
 359                              info->curr_fmt->ispctl1_reg);
 360 }
 361
 362 /* Find nearest matching image pixel size. */
 363 static int noon010_try_frame_size(struct v4l2_mbus_framefmt *mf,
 364                                   const struct noon010_frmsize **size)
 365 {
 366         unsigned int min_err = ~0;
 367         int i = ARRAY_SIZE(noon010_sizes);
 368         const struct noon010_frmsize *fsize = &noon010_sizes[0],
 369                 *match = NULL;
 370
 371         while (i--) {
 372                 int err = abs(fsize->width - mf->width)
 373                                 + abs(fsize->height - mf->height);
 374
 375                 if (err < min_err) {
 376                         min_err = err;
 377                         match = fsize;
 378                 }
 379                 fsize++;
 380         }
 381         if (match) {
 382                 mf->width  = match->width;
 383                 mf->height = match->height;
 384                 if (size)
 385                         *size = match;
 386                 return 0;
 387         }
 388         return -EINVAL;
 389 }
 390
 391 /* Called with info.lock mutex held */
 392 static int power_enable(struct noon010_info *info)
 393 {
 394         int ret;
 395
 396         if (info->power) {
 397                 v4l2_info(&info->sd, "%s: sensor is already on\n", __func__);
 398                 return 0;
 399         }
 400
 401         if (gpio_is_valid(info->gpio_nstby))
 402                 gpio_set_value(info->gpio_nstby, 0);
 403
 404         if (gpio_is_valid(info->gpio_nreset))
 405                 gpio_set_value(info->gpio_nreset, 0);
 406
 407         ret = regulator_bulk_enable(NOON010_NUM_SUPPLIES, info->supply);
 408         if (ret)
 409                 return ret;
 410
 411         if (gpio_is_valid(info->gpio_nreset)) {
 412                 msleep(50);
 413                 gpio_set_value(info->gpio_nreset, 1);
 414         }
 415         if (gpio_is_valid(info->gpio_nstby)) {
 416                 udelay(1000);
 417                 gpio_set_value(info->gpio_nstby, 1);
 418         }
 419         if (gpio_is_valid(info->gpio_nreset)) {
 420                 udelay(1000);
 421                 gpio_set_value(info->gpio_nreset, 0);
 422                 msleep(100);
 423                 gpio_set_value(info->gpio_nreset, 1);
 424                 msleep(20);
 425         }
 426         info->power = 1;
 427
 428         v4l2_dbg(1, debug, &info->sd,  "%s: sensor is on\n", __func__);
 429         return 0;
 430 }
 431
 432 /* Called with info.lock mutex held */
 433 static int power_disable(struct noon010_info *info)
 434 {
 435         int ret;
 436
 437         if (!info->power) {
 438                 v4l2_info(&info->sd, "%s: sensor is already off\n", __func__);
 439                 return 0;
 440         }
 441
 442         ret = regulator_bulk_disable(NOON010_NUM_SUPPLIES, info->supply);
 443         if (ret)
 444                 return ret;
 445
 446         if (gpio_is_valid(info->gpio_nstby))
 447                 gpio_set_value(info->gpio_nstby, 0);
 448
 449         if (gpio_is_valid(info->gpio_nreset))
 450                 gpio_set_value(info->gpio_nreset, 0);
 451
 452         info->power = 0;
 453
 454         v4l2_dbg(1, debug, &info->sd,  "%s: sensor is off\n", __func__);
 455
 456         return 0;
 457 }
 458
 459 static int noon010_s_ctrl(struct v4l2_ctrl *ctrl)
 460 {
 461         struct v4l2_subdev *sd = to_sd(ctrl);
 462         struct noon010_info *info = to_noon010(sd);
 463         int ret = 0;
 464
 465         v4l2_dbg(1, debug, sd, "%s: ctrl_id: %d, value: %d\n",
 466                  __func__, ctrl->id, ctrl->val);
 467
 468         mutex_lock(&info->lock);
 469         /*
 470          * If the device is not powered up by the host driver do
 471          * not apply any controls to H/W at this time. Instead
 472          * the controls will be restored right after power-up.
 473          */
 474         if (!info->power)
 475                 goto unlock;
 476
 477         switch (ctrl->id) {
 478         case V4L2_CID_AUTO_WHITE_BALANCE:
 479                 ret = noon010_enable_autowhitebalance(sd, ctrl->val);
 480                 break;
 481         case V4L2_CID_BLUE_BALANCE:
 482                 ret = cam_i2c_write(sd, MWB_BGAIN_REG, ctrl->val);
 483                 break;
 484         case V4L2_CID_RED_BALANCE:
 485                 ret =  cam_i2c_write(sd, MWB_RGAIN_REG, ctrl->val);
 486                 break;
 487         default:
 488                 ret = -EINVAL;
 489         }
 490 unlock:
 491         mutex_unlock(&info->lock);
 492         return ret;
 493 }
 494
 495 static int noon010_enum_mbus_code(struct v4l2_subdev *sd,
 496                                   struct v4l2_subdev_fh *fh,
 497                                   struct v4l2_subdev_mbus_code_enum *code)
 498 {
 499         if (code->index >= ARRAY_SIZE(noon010_formats))
 500                 return -EINVAL;
 501
 502         code->code = noon010_formats[code->index].code;
 503         return 0;
 504 }
 505
 506 static int noon010_get_fmt(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh,
 507                            struct v4l2_subdev_format *fmt)
 508 {
 509         struct noon010_info *info = to_noon010(sd);
 510         struct v4l2_mbus_framefmt *mf;
 511
 512         if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) {
 513                 if (fh) {
 514                         mf = v4l2_subdev_get_try_format(fh, 0);
 515                         fmt->format = *mf;
 516                 }
 517                 return 0;
 518         }
 519         mf = &fmt->format;
 520
 521         mutex_lock(&info->lock);
 522         mf->width = info->curr_win->width;
 523         mf->height = info->curr_win->height;
 524         mf->code = info->curr_fmt->code;
 525         mf->colorspace = info->curr_fmt->colorspace;
 526         mf->field = V4L2_FIELD_NONE;
 527
 528         mutex_unlock(&info->lock);
 529         return 0;
 530 }
 531
 532 /* Return nearest media bus frame format. */
 533 static const struct noon010_format *noon010_try_fmt(struct v4l2_subdev *sd,
 534                                             struct v4l2_mbus_framefmt *mf)
 535 {
 536         int i = ARRAY_SIZE(noon010_formats);
 537
 538         while (--i)
 539                 if (mf->code == noon010_formats[i].code)
 540                         break;
 541         mf->code = noon010_formats[i].code;
 542
 543         return &noon010_formats[i];
 544 }
 545
 546 static int noon010_set_fmt(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh,
 547                            struct v4l2_subdev_format *fmt)
 548 {
 549         struct noon010_info *info = to_noon010(sd);
 550         const struct noon010_frmsize *size = NULL;
 551         const struct noon010_format *nf;
 552         struct v4l2_mbus_framefmt *mf;
 553         int ret = 0;
 554
 555         nf = noon010_try_fmt(sd, &fmt->format);
 556         noon010_try_frame_size(&fmt->format, &size);
 557         fmt->format.colorspace = V4L2_COLORSPACE_JPEG;
 558
 559         if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) {
 560                 if (fh) {
 561                         mf = v4l2_subdev_get_try_format(fh, 0);
 562                         *mf = fmt->format;
 563                 }
 564                 return 0;
 565         }
 566         mutex_lock(&info->lock);
 567         if (!info->streaming) {
 568                 info->apply_new_cfg = 1;
 569                 info->curr_fmt = nf;
 570                 info->curr_win = size;
 571         } else {
 572                 ret = -EBUSY;
 573         }
 574         mutex_unlock(&info->lock);
 575         return ret;
 576 }
 577
 578 /* Called with struct noon010_info.lock mutex held */
 579 static int noon010_base_config(struct v4l2_subdev *sd)
 580 {
 581         int ret = noon010_bulk_write_reg(sd, noon010_base_regs);
 582         if (!ret)
 583                 ret = noon010_set_params(sd);
 584         if (!ret)
 585                 ret = noon010_set_flip(sd, 1, 0);
 586
 587         return ret;
 588 }
 589
 590 static int noon010_s_power(struct v4l2_subdev *sd, int on)
 591 {
 592         struct noon010_info *info = to_noon010(sd);
 593         int ret;
 594
 595         mutex_lock(&info->lock);
 596         if (on) {
 597                 ret = power_enable(info);
 598                 if (!ret)
 599                         ret = noon010_base_config(sd);
 600         } else {
 601                 noon010_power_ctrl(sd, false, true);
 602                 ret = power_disable(info);
 603         }
 604         mutex_unlock(&info->lock);
 605
 606         /* Restore the controls state */
 607         if (!ret && on)
 608                 ret = v4l2_ctrl_handler_setup(&info->hdl);
 609
 610         return ret;
 611 }
 612
 613 static int noon010_s_stream(struct v4l2_subdev *sd, int on)
 614 {
 615         struct noon010_info *info = to_noon010(sd);
 616         int ret = 0;
 617
 618         mutex_lock(&info->lock);
 619         if (!info->streaming != !on) {
 620                 ret = noon010_power_ctrl(sd, false, !on);
 621                 if (!ret)
 622                         info->streaming = on;
 623         }
 624         if (!ret && on && info->apply_new_cfg) {
 625                 ret = noon010_set_params(sd);
 626                 if (!ret)
 627                         info->apply_new_cfg = 0;
 628         }
 629         mutex_unlock(&info->lock);
 630         return ret;
 631 }
 632
 633 static int noon010_log_status(struct v4l2_subdev *sd)
 634 {
 635         struct noon010_info *info = to_noon010(sd);
 636
 637         v4l2_ctrl_handler_log_status(&info->hdl, sd->name);
 638         return 0;
 639 }
 640
 641 static int noon010_open(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)
 642 {
 643         struct v4l2_mbus_framefmt *mf = v4l2_subdev_get_try_format(fh, 0);
 644
 645         mf->width = noon010_sizes[0].width;
 646         mf->height = noon010_sizes[0].height;
 647         mf->code = noon010_formats[0].code;
 648         mf->colorspace = V4L2_COLORSPACE_JPEG;
 649         mf->field = V4L2_FIELD_NONE;
 650         return 0;
 651 }
 652
 653 static const struct v4l2_subdev_internal_ops noon010_subdev_internal_ops = {
 654         .open = noon010_open,
 655 };
 656
 657 static const struct v4l2_ctrl_ops noon010_ctrl_ops = {
 658         .s_ctrl = noon010_s_ctrl,
 659 };
 660
 661 static const struct v4l2_subdev_core_ops noon010_core_ops = {
 662         .s_power        = noon010_s_power,
 663         .log_status     = noon010_log_status,
 664 };
 665
 666 static struct v4l2_subdev_pad_ops noon010_pad_ops = {
 667         .enum_mbus_code = noon010_enum_mbus_code,
 668         .get_fmt        = noon010_get_fmt,
 669         .set_fmt        = noon010_set_fmt,
 670 };
 671
 672 static struct v4l2_subdev_video_ops noon010_video_ops = {
 673         .s_stream       = noon010_s_stream,
 674 };
 675
 676 static const struct v4l2_subdev_ops noon010_ops = {
 677         .core   = &noon010_core_ops,
 678         .pad    = &noon010_pad_ops,
 679         .video  = &noon010_video_ops,
 680 };
 681
 682 /* Return 0 if NOON010PC30L sensor type was detected or -ENODEV otherwise. */
 683 static int noon010_detect(struct i2c_client *client, struct noon010_info *info)
 684 {
 685         int ret;
 686
 687         ret = power_enable(info);
 688         if (ret)
 689                 return ret;
 690
 691         ret = i2c_smbus_read_byte_data(client, DEVICE_ID_REG);
 692         if (ret < 0)
 693                 dev_err(&client->dev, "I2C read failed: 0x%X\n", ret);
 694
 695         power_disable(info);
 696
 697         return ret == NOON010PC30_ID ? 0 : -ENODEV;
 698 }
 699
 700 static int noon010_probe(struct i2c_client *client,
 701                          const struct i2c_device_id *id)
 702 {
 703         struct noon010_info *info;
 704         struct v4l2_subdev *sd;
 705         const struct noon010pc30_platform_data *pdata
 706                 = client->dev.platform_data;
 707         int ret;
 708         int i;
 709
 710         if (!pdata) {
 711                 dev_err(&client->dev, "No platform data!\n");
 712                 return -EIO;
 713         }
 714
 715         info = kzalloc(sizeof(*info), GFP_KERNEL);
 716         if (!info)
 717                 return -ENOMEM;
 718
 719         mutex_init(&info->lock);
 720         sd = &info->sd;
 721         v4l2_i2c_subdev_init(sd, client, &noon010_ops);
 722         strlcpy(sd->name, MODULE_NAME, sizeof(sd->name));
 723
 724         sd->internal_ops = &noon010_subdev_internal_ops;
 725         sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
 726
 727         v4l2_ctrl_handler_init(&info->hdl, 3);
 728
 729         v4l2_ctrl_new_std(&info->hdl, &noon010_ctrl_ops,
 730                           V4L2_CID_AUTO_WHITE_BALANCE, 0, 1, 1, 1);
 731         v4l2_ctrl_new_std(&info->hdl, &noon010_ctrl_ops,
 732                           V4L2_CID_RED_BALANCE, 0, 127, 1, 64);
 733         v4l2_ctrl_new_std(&info->hdl, &noon010_ctrl_ops,
 734                           V4L2_CID_BLUE_BALANCE, 0, 127, 1, 64);
 735
 736         sd->ctrl_handler = &info->hdl;
 737
 738         ret = info->hdl.error;
 739         if (ret)
 740                 goto np_err;
 741
 742         info->i2c_reg_page      = -1;
 743         info->gpio_nreset       = -EINVAL;
 744         info->gpio_nstby        = -EINVAL;
 745         info->curr_fmt          = &noon010_formats[0];
 746         info->curr_win          = &noon010_sizes[0];
 747
 748         if (gpio_is_valid(pdata->gpio_nreset)) {
 749                 ret = gpio_request(pdata->gpio_nreset, "NOON010PC30 NRST");
 750                 if (ret) {
 751                         dev_err(&client->dev, "GPIO request error: %d\n", ret);
 752                         goto np_err;
 753                 }
 754                 info->gpio_nreset = pdata->gpio_nreset;
 755                 gpio_direction_output(info->gpio_nreset, 0);
 756                 gpio_export(info->gpio_nreset, 0);
 757         }
 758
 759         if (gpio_is_valid(pdata->gpio_nstby)) {
 760                 ret = gpio_request(pdata->gpio_nstby, "NOON010PC30 NSTBY");
 761                 if (ret) {
 762                         dev_err(&client->dev, "GPIO request error: %d\n", ret);
 763                         goto np_gpio_err;
 764                 }
 765                 info->gpio_nstby = pdata->gpio_nstby;
 766                 gpio_direction_output(info->gpio_nstby, 0);
 767                 gpio_export(info->gpio_nstby, 0);
 768         }
 769
 770         for (i = 0; i < NOON010_NUM_SUPPLIES; i++)
 771                 info->supply[i].supply = noon010_supply_name[i];
 772
 773         ret = regulator_bulk_get(&client->dev, NOON010_NUM_SUPPLIES,
 774                                  info->supply);
 775         if (ret)
 776                 goto np_reg_err;
 777
 778         info->pad.flags = MEDIA_PAD_FL_SOURCE;
 779         sd->entity.type = MEDIA_ENT_T_V4L2_SUBDEV_SENSOR;
 780         ret = media_entity_init(&sd->entity, 1, &info->pad, 0);
 781         if (ret < 0)
 782                 goto np_me_err;
 783
 784         ret = noon010_detect(client, info);
 785         if (!ret)
 786                 return 0;
 787
 788 np_me_err:
 789         regulator_bulk_free(NOON010_NUM_SUPPLIES, info->supply);
 790 np_reg_err:
 791         if (gpio_is_valid(info->gpio_nstby))
 792                 gpio_free(info->gpio_nstby);
 793 np_gpio_err:
 794         if (gpio_is_valid(info->gpio_nreset))
 795                 gpio_free(info->gpio_nreset);
 796 np_err:
 797         v4l2_ctrl_handler_free(&info->hdl);
 798         v4l2_device_unregister_subdev(sd);
 799         kfree(info);
 800         return ret;
 801 }
 802
 803 static int noon010_remove(struct i2c_client *client)
 804 {
 805         struct v4l2_subdev *sd = i2c_get_clientdata(client);
 806         struct noon010_info *info = to_noon010(sd);
 807
 808         v4l2_device_unregister_subdev(sd);
 809         v4l2_ctrl_handler_free(&info->hdl);
 810
 811         regulator_bulk_free(NOON010_NUM_SUPPLIES, info->supply);
 812
 813         if (gpio_is_valid(info->gpio_nreset))
 814                 gpio_free(info->gpio_nreset);
 815
 816         if (gpio_is_valid(info->gpio_nstby))
 817                 gpio_free(info->gpio_nstby);
 818
 819         media_entity_cleanup(&sd->entity);
 820         kfree(info);
 821         return 0;
 822 }
 823
 824 static const struct i2c_device_id noon010_id[] = {
 825         { MODULE_NAME, 0 },
 826         { },
 827 };
 828 MODULE_DEVICE_TABLE(i2c, noon010_id);
 829
 830
 831 static struct i2c_driver noon010_i2c_driver = {
 832         .driver = {
 833                 .name = MODULE_NAME
 834         },
 835         .probe          = noon010_probe,
 836         .remove         = noon010_remove,
 837         .id_table       = noon010_id,
 838 };
 839
 840 module_i2c_driver(noon010_i2c_driver);
 841
 842 MODULE_DESCRIPTION("Siliconfile NOON010PC30 camera driver");
 843 MODULE_AUTHOR("Sylwester Nawrocki <s.nawrocki@samsung.com>");
 844 MODULE_LICENSE("GPL");