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 <linux/videodev2.h>
  23 #include <linux/module.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         u32 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 media_pad pad;
 135         struct v4l2_ctrl_handler hdl;
 136         struct regulator_bulk_data supply[NOON010_NUM_SUPPLIES];
 137         u32 gpio_nreset;
 138         u32 gpio_nstby;
 139
 140         /* Protects the struct members below */
 141         struct mutex lock;
 142
 143         const struct noon010_format *curr_fmt;
 144         const struct noon010_frmsize *curr_win;
 145         unsigned int apply_new_cfg:1;
 146         unsigned int streaming:1;
 147         unsigned int hflip:1;
 148         unsigned int vflip:1;
 149         unsigned int power:1;
 150         u8 i2c_reg_page;
 151 };
 152
 153 struct i2c_regval {
 154         u16 addr;
 155         u16 val;
 156 };
 157
 158 /* Supported resolutions. */
 159 static const struct noon010_frmsize noon010_sizes[] = {
 160         {
 161                 .width          = 352,
 162                 .height         = 288,
 163                 .vid_ctl1       = 0,
 164         }, {
 165                 .width          = 176,
 166                 .height         = 144,
 167                 .vid_ctl1       = 0x10,
 168         }, {
 169                 .width          = 88,
 170                 .height         = 72,
 171                 .vid_ctl1       = 0x20,
 172         },
 173 };
 174
 175 /* Supported pixel formats. */
 176 static const struct noon010_format noon010_formats[] = {
 177         {
 178                 .code           = MEDIA_BUS_FMT_YUYV8_2X8,
 179                 .colorspace     = V4L2_COLORSPACE_JPEG,
 180                 .ispctl1_reg    = 0x03,
 181         }, {
 182                 .code           = MEDIA_BUS_FMT_YVYU8_2X8,
 183                 .colorspace     = V4L2_COLORSPACE_JPEG,
 184                 .ispctl1_reg    = 0x02,
 185         }, {
 186                 .code           = MEDIA_BUS_FMT_VYUY8_2X8,
 187                 .colorspace     = V4L2_COLORSPACE_JPEG,
 188                 .ispctl1_reg    = 0,
 189         }, {
 190                 .code           = MEDIA_BUS_FMT_UYVY8_2X8,
 191                 .colorspace     = V4L2_COLORSPACE_JPEG,
 192                 .ispctl1_reg    = 0x01,
 193         }, {
 194                 .code           = MEDIA_BUS_FMT_RGB565_2X8_BE,
 195                 .colorspace     = V4L2_COLORSPACE_JPEG,
 196                 .ispctl1_reg    = 0x40,
 197         },
 198 };
 199
 200 static const struct i2c_regval noon010_base_regs[] = {
 201         { WIN_COLL_REG,         0x06 }, { HBLANKL_REG,          0x7C },
 202         /* Color corection and saturation */
 203         { ISP_CTL_REG(0),       0x30 }, { ISP_CTL_REG(2),       0x30 },
 204         { YOFS_REG,             0x80 }, { DARK_YOFS_REG,        0x04 },
 205         { SAT_CTL_REG,          0x1F }, { BSAT_REG,             0x90 },
 206         { CMC_CTL_REG,          0x0F }, { CMC_OFSGH_REG,        0x3C },
 207         { CMC_OFSGL_REG,        0x2C }, { CMC_SIGN_REG,         0x3F },
 208         { CMC_COEF_REG(0),      0x79 }, { CMC_OFS_REG(0),       0x00 },
 209         { CMC_COEF_REG(1),      0x39 }, { CMC_OFS_REG(1),       0x00 },
 210         { CMC_COEF_REG(2),      0x00 }, { CMC_OFS_REG(2),       0x00 },
 211         { CMC_COEF_REG(3),      0x11 }, { CMC_OFS_REG(3),       0x8B },
 212         { CMC_COEF_REG(4),      0x65 }, { CMC_OFS_REG(4),       0x07 },
 213         { CMC_COEF_REG(5),      0x14 }, { CMC_OFS_REG(5),       0x04 },
 214         { CMC_COEF_REG(6),      0x01 }, { CMC_OFS_REG(6),       0x9C },
 215         { CMC_COEF_REG(7),      0x33 }, { CMC_OFS_REG(7),       0x89 },
 216         { CMC_COEF_REG(8),      0x74 }, { CMC_OFS_REG(8),       0x25 },
 217         /* Automatic white balance */
 218         { AWB_CTL_REG(0),       0x78 }, { AWB_CTL_REG(1),       0x2E },
 219         { AWB_CTL_REG(2),       0x20 }, { AWB_CTL_REG(3),       0x85 },
 220         /* Auto exposure */
 221         { AE_CTL_REG(0),        0xDC }, { AE_CTL_REG(1),        0x81 },
 222         { AE_CTL_REG(2),        0x30 }, { AE_CTL_REG(3),        0xA5 },
 223         { AE_CTL_REG(4),        0x40 }, { AE_CTL_REG(5),        0x51 },
 224         { AE_CTL_REG(6),        0x33 }, { AE_CTL_REG(7),        0x7E },
 225         { AE_CTL9_REG,          0x00 }, { AE_CTL10_REG,         0x02 },
 226         { AE_YLVL_REG,          0x44 }, { AE_YTH_REG(0),        0x34 },
 227         { AE_YTH_REG(1),        0x30 }, { AE_WGT_REG,           0xD5 },
 228         /* Lens shading compensation */
 229         { LENS_CTRL_REG,        0x01 }, { LENS_XCEN_REG,        0x80 },
 230         { LENS_YCEN_REG,        0x70 }, { LENS_RC_REG,          0x53 },
 231         { LENS_GC_REG,          0x40 }, { LENS_BC_REG,          0x3E },
 232         { REG_TERM,             0 },
 233 };
 234
 235 static inline struct noon010_info *to_noon010(struct v4l2_subdev *sd)
 236 {
 237         return container_of(sd, struct noon010_info, sd);
 238 }
 239
 240 static inline struct v4l2_subdev *to_sd(struct v4l2_ctrl *ctrl)
 241 {
 242         return &container_of(ctrl->handler, struct noon010_info, hdl)->sd;
 243 }
 244
 245 static inline int set_i2c_page(struct noon010_info *info,
 246                                struct i2c_client *client, unsigned int reg)
 247 {
 248         u32 page = reg >> 8 & 0xFF;
 249         int ret = 0;
 250
 251         if (info->i2c_reg_page != page && (reg & 0xFF) != 0x03) {
 252                 ret = i2c_smbus_write_byte_data(client, PAGEMODE_REG, page);
 253                 if (!ret)
 254                         info->i2c_reg_page = page;
 255         }
 256         return ret;
 257 }
 258
 259 static int cam_i2c_read(struct v4l2_subdev *sd, u32 reg_addr)
 260 {
 261         struct i2c_client *client = v4l2_get_subdevdata(sd);
 262         struct noon010_info *info = to_noon010(sd);
 263         int ret = set_i2c_page(info, client, reg_addr);
 264
 265         if (ret)
 266                 return ret;
 267         return i2c_smbus_read_byte_data(client, reg_addr & 0xFF);
 268 }
 269
 270 static int cam_i2c_write(struct v4l2_subdev *sd, u32 reg_addr, u32 val)
 271 {
 272         struct i2c_client *client = v4l2_get_subdevdata(sd);
 273         struct noon010_info *info = to_noon010(sd);
 274         int ret = set_i2c_page(info, client, reg_addr);
 275
 276         if (ret)
 277                 return ret;
 278         return i2c_smbus_write_byte_data(client, reg_addr & 0xFF, val);
 279 }
 280
 281 static inline int noon010_bulk_write_reg(struct v4l2_subdev *sd,
 282                                          const struct i2c_regval *msg)
 283 {
 284         while (msg->addr != REG_TERM) {
 285                 int ret = cam_i2c_write(sd, msg->addr, msg->val);
 286
 287                 if (ret)
 288                         return ret;
 289                 msg++;
 290         }
 291         return 0;
 292 }
 293
 294 /* Device reset and sleep mode control */
 295 static int noon010_power_ctrl(struct v4l2_subdev *sd, bool reset, bool sleep)
 296 {
 297         struct noon010_info *info = to_noon010(sd);
 298         u8 reg = sleep ? 0xF1 : 0xF0;
 299         int ret = 0;
 300
 301         if (reset) {
 302                 ret = cam_i2c_write(sd, POWER_CTRL_REG, reg | 0x02);
 303                 udelay(20);
 304         }
 305         if (!ret) {
 306                 ret = cam_i2c_write(sd, POWER_CTRL_REG, reg);
 307                 if (reset && !ret)
 308                         info->i2c_reg_page = -1;
 309         }
 310         return ret;
 311 }
 312
 313 /* Automatic white balance control */
 314 static int noon010_enable_autowhitebalance(struct v4l2_subdev *sd, int on)
 315 {
 316         int ret;
 317
 318         ret = cam_i2c_write(sd, AWB_CTL_REG(1), on ? 0x2E : 0x2F);
 319         if (!ret)
 320                 ret = cam_i2c_write(sd, AWB_CTL_REG(0), on ? 0xFB : 0x7B);
 321         return ret;
 322 }
 323
 324 /* Called with struct noon010_info.lock mutex held */
 325 static int noon010_set_flip(struct v4l2_subdev *sd, int hflip, int vflip)
 326 {
 327         struct noon010_info *info = to_noon010(sd);
 328         int reg, ret;
 329
 330         reg = cam_i2c_read(sd, VDO_CTL_REG(1));
 331         if (reg < 0)
 332                 return reg;
 333
 334         reg &= 0x7C;
 335         if (hflip)
 336                 reg |= 0x01;
 337         if (vflip)
 338                 reg |= 0x02;
 339
 340         ret = cam_i2c_write(sd, VDO_CTL_REG(1), reg | 0x80);
 341         if (!ret) {
 342                 info->hflip = hflip;
 343                 info->vflip = vflip;
 344         }
 345         return ret;
 346 }
 347
 348 /* Configure resolution and color format */
 349 static int noon010_set_params(struct v4l2_subdev *sd)
 350 {
 351         struct noon010_info *info = to_noon010(sd);
 352
 353         int ret = cam_i2c_write(sd, VDO_CTL_REG(0),
 354                                 info->curr_win->vid_ctl1);
 355         if (ret)
 356                 return ret;
 357         return cam_i2c_write(sd, ISP_CTL_REG(0),
 358                              info->curr_fmt->ispctl1_reg);
 359 }
 360
 361 /* Find nearest matching image pixel size. */
 362 static int noon010_try_frame_size(struct v4l2_mbus_framefmt *mf,
 363                                   const struct noon010_frmsize **size)
 364 {
 365         unsigned int min_err = ~0;
 366         int i = ARRAY_SIZE(noon010_sizes);
 367         const struct noon010_frmsize *fsize = &noon010_sizes[0],
 368                 *match = NULL;
 369
 370         while (i--) {
 371                 int err = abs(fsize->width - mf->width)
 372                                 + abs(fsize->height - mf->height);
 373
 374                 if (err < min_err) {
 375                         min_err = err;
 376                         match = fsize;
 377                 }
 378                 fsize++;
 379         }
 380         if (match) {
 381                 mf->width  = match->width;
 382                 mf->height = match->height;
 383                 if (size)
 384                         *size = match;
 385                 return 0;
 386         }
 387         return -EINVAL;
 388 }
 389
 390 /* Called with info.lock mutex held */
 391 static int power_enable(struct noon010_info *info)
 392 {
 393         int ret;
 394
 395         if (info->power) {
 396                 v4l2_info(&info->sd, "%s: sensor is already on\n", __func__);
 397                 return 0;
 398         }
 399
 400         if (gpio_is_valid(info->gpio_nstby))
 401                 gpio_set_value(info->gpio_nstby, 0);
 402
 403         if (gpio_is_valid(info->gpio_nreset))
 404                 gpio_set_value(info->gpio_nreset, 0);
 405
 406         ret = regulator_bulk_enable(NOON010_NUM_SUPPLIES, info->supply);
 407         if (ret)
 408                 return ret;
 409
 410         if (gpio_is_valid(info->gpio_nreset)) {
 411                 msleep(50);
 412                 gpio_set_value(info->gpio_nreset, 1);
 413         }
 414         if (gpio_is_valid(info->gpio_nstby)) {
 415                 udelay(1000);
 416                 gpio_set_value(info->gpio_nstby, 1);
 417         }
 418         if (gpio_is_valid(info->gpio_nreset)) {
 419                 udelay(1000);
 420                 gpio_set_value(info->gpio_nreset, 0);
 421                 msleep(100);
 422                 gpio_set_value(info->gpio_nreset, 1);
 423                 msleep(20);
 424         }
 425         info->power = 1;
 426
 427         v4l2_dbg(1, debug, &info->sd,  "%s: sensor is on\n", __func__);
 428         return 0;
 429 }
 430
 431 /* Called with info.lock mutex held */
 432 static int power_disable(struct noon010_info *info)
 433 {
 434         int ret;
 435
 436         if (!info->power) {
 437                 v4l2_info(&info->sd, "%s: sensor is already off\n", __func__);
 438                 return 0;
 439         }
 440
 441         ret = regulator_bulk_disable(NOON010_NUM_SUPPLIES, info->supply);
 442         if (ret)
 443                 return ret;
 444
 445         if (gpio_is_valid(info->gpio_nstby))
 446                 gpio_set_value(info->gpio_nstby, 0);
 447
 448         if (gpio_is_valid(info->gpio_nreset))
 449                 gpio_set_value(info->gpio_nreset, 0);
 450
 451         info->power = 0;
 452
 453         v4l2_dbg(1, debug, &info->sd,  "%s: sensor is off\n", __func__);
 454
 455         return 0;
 456 }
 457
 458 static int noon010_s_ctrl(struct v4l2_ctrl *ctrl)
 459 {
 460         struct v4l2_subdev *sd = to_sd(ctrl);
 461         struct noon010_info *info = to_noon010(sd);
 462         int ret = 0;
 463
 464         v4l2_dbg(1, debug, sd, "%s: ctrl_id: %d, value: %d\n",
 465                  __func__, ctrl->id, ctrl->val);
 466
 467         mutex_lock(&info->lock);
 468         /*
 469          * If the device is not powered up by the host driver do
 470          * not apply any controls to H/W at this time. Instead
 471          * the controls will be restored right after power-up.
 472          */
 473         if (!info->power)
 474                 goto unlock;
 475
 476         switch (ctrl->id) {
 477         case V4L2_CID_AUTO_WHITE_BALANCE:
 478                 ret = noon010_enable_autowhitebalance(sd, ctrl->val);
 479                 break;
 480         case V4L2_CID_BLUE_BALANCE:
 481                 ret = cam_i2c_write(sd, MWB_BGAIN_REG, ctrl->val);
 482                 break;
 483         case V4L2_CID_RED_BALANCE:
 484                 ret =  cam_i2c_write(sd, MWB_RGAIN_REG, ctrl->val);
 485                 break;
 486         default:
 487                 ret = -EINVAL;
 488         }
 489 unlock:
 490         mutex_unlock(&info->lock);
 491         return ret;
 492 }
 493
 494 static int noon010_enum_mbus_code(struct v4l2_subdev *sd,
 495                                   struct v4l2_subdev_pad_config *cfg,
 496                                   struct v4l2_subdev_mbus_code_enum *code)
 497 {
 498         if (code->index >= ARRAY_SIZE(noon010_formats))
 499                 return -EINVAL;
 500
 501         code->code = noon010_formats[code->index].code;
 502         return 0;
 503 }
 504
 505 static int noon010_get_fmt(struct v4l2_subdev *sd,
 506                            struct v4l2_subdev_pad_config *cfg,
 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 (cfg) {
 514                         mf = v4l2_subdev_get_try_format(sd, cfg, 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_pad_config *cfg,
 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         fmt->format.field = V4L2_FIELD_NONE;
 559
 560         if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) {
 561                 if (cfg) {
 562                         mf = v4l2_subdev_get_try_format(sd, cfg, 0);
 563                         *mf = fmt->format;
 564                 }
 565                 return 0;
 566         }
 567         mutex_lock(&info->lock);
 568         if (!info->streaming) {
 569                 info->apply_new_cfg = 1;
 570                 info->curr_fmt = nf;
 571                 info->curr_win = size;
 572         } else {
 573                 ret = -EBUSY;
 574         }
 575         mutex_unlock(&info->lock);
 576         return ret;
 577 }
 578
 579 /* Called with struct noon010_info.lock mutex held */
 580 static int noon010_base_config(struct v4l2_subdev *sd)
 581 {
 582         int ret = noon010_bulk_write_reg(sd, noon010_base_regs);
 583         if (!ret)
 584                 ret = noon010_set_params(sd);
 585         if (!ret)
 586                 ret = noon010_set_flip(sd, 1, 0);
 587
 588         return ret;
 589 }
 590
 591 static int noon010_s_power(struct v4l2_subdev *sd, int on)
 592 {
 593         struct noon010_info *info = to_noon010(sd);
 594         int ret;
 595
 596         mutex_lock(&info->lock);
 597         if (on) {
 598                 ret = power_enable(info);
 599                 if (!ret)
 600                         ret = noon010_base_config(sd);
 601         } else {
 602                 noon010_power_ctrl(sd, false, true);
 603                 ret = power_disable(info);
 604         }
 605         mutex_unlock(&info->lock);
 606
 607         /* Restore the controls state */
 608         if (!ret && on)
 609                 ret = v4l2_ctrl_handler_setup(&info->hdl);
 610
 611         return ret;
 612 }
 613
 614 static int noon010_s_stream(struct v4l2_subdev *sd, int on)
 615 {
 616         struct noon010_info *info = to_noon010(sd);
 617         int ret = 0;
 618
 619         mutex_lock(&info->lock);
 620         if (!info->streaming != !on) {
 621                 ret = noon010_power_ctrl(sd, false, !on);
 622                 if (!ret)
 623                         info->streaming = on;
 624         }
 625         if (!ret && on && info->apply_new_cfg) {
 626                 ret = noon010_set_params(sd);
 627                 if (!ret)
 628                         info->apply_new_cfg = 0;
 629         }
 630         mutex_unlock(&info->lock);
 631         return ret;
 632 }
 633
 634 static int noon010_log_status(struct v4l2_subdev *sd)
 635 {
 636         struct noon010_info *info = to_noon010(sd);
 637
 638         v4l2_ctrl_handler_log_status(&info->hdl, sd->name);
 639         return 0;
 640 }
 641
 642 static int noon010_open(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)
 643 {
 644         struct v4l2_mbus_framefmt *mf = v4l2_subdev_get_try_format(sd, fh->pad, 0);
 645
 646         mf->width = noon010_sizes[0].width;
 647         mf->height = noon010_sizes[0].height;
 648         mf->code = noon010_formats[0].code;
 649         mf->colorspace = V4L2_COLORSPACE_JPEG;
 650         mf->field = V4L2_FIELD_NONE;
 651         return 0;
 652 }
 653
 654 static const struct v4l2_subdev_internal_ops noon010_subdev_internal_ops = {
 655         .open = noon010_open,
 656 };
 657
 658 static const struct v4l2_ctrl_ops noon010_ctrl_ops = {
 659         .s_ctrl = noon010_s_ctrl,
 660 };
 661
 662 static const struct v4l2_subdev_core_ops noon010_core_ops = {
 663         .s_power        = noon010_s_power,
 664         .log_status     = noon010_log_status,
 665 };
 666
 667 static struct v4l2_subdev_pad_ops noon010_pad_ops = {
 668         .enum_mbus_code = noon010_enum_mbus_code,
 669         .get_fmt        = noon010_get_fmt,
 670         .set_fmt        = noon010_set_fmt,
 671 };
 672
 673 static struct v4l2_subdev_video_ops noon010_video_ops = {
 674         .s_stream       = noon010_s_stream,
 675 };
 676
 677 static const struct v4l2_subdev_ops noon010_ops = {
 678         .core   = &noon010_core_ops,
 679         .pad    = &noon010_pad_ops,
 680         .video  = &noon010_video_ops,
 681 };
 682
 683 /* Return 0 if NOON010PC30L sensor type was detected or -ENODEV otherwise. */
 684 static int noon010_detect(struct i2c_client *client, struct noon010_info *info)
 685 {
 686         int ret;
 687
 688         ret = power_enable(info);
 689         if (ret)
 690                 return ret;
 691
 692         ret = i2c_smbus_read_byte_data(client, DEVICE_ID_REG);
 693         if (ret < 0)
 694                 dev_err(&client->dev, "I2C read failed: 0x%X\n", ret);
 695
 696         power_disable(info);
 697
 698         return ret == NOON010PC30_ID ? 0 : -ENODEV;
 699 }
 700
 701 static int noon010_probe(struct i2c_client *client,
 702                          const struct i2c_device_id *id)
 703 {
 704         struct noon010_info *info;
 705         struct v4l2_subdev *sd;
 706         const struct noon010pc30_platform_data *pdata
 707                 = client->dev.platform_data;
 708         int ret;
 709         int i;
 710
 711         if (!pdata) {
 712                 dev_err(&client->dev, "No platform data!\n");
 713                 return -EIO;
 714         }
 715
 716         info = devm_kzalloc(&client->dev, sizeof(*info), GFP_KERNEL);
 717         if (!info)
 718                 return -ENOMEM;
 719
 720         mutex_init(&info->lock);
 721         sd = &info->sd;
 722         v4l2_i2c_subdev_init(sd, client, &noon010_ops);
 723         strlcpy(sd->name, MODULE_NAME, sizeof(sd->name));
 724
 725         sd->internal_ops = &noon010_subdev_internal_ops;
 726         sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
 727
 728         v4l2_ctrl_handler_init(&info->hdl, 3);
 729
 730         v4l2_ctrl_new_std(&info->hdl, &noon010_ctrl_ops,
 731                           V4L2_CID_AUTO_WHITE_BALANCE, 0, 1, 1, 1);
 732         v4l2_ctrl_new_std(&info->hdl, &noon010_ctrl_ops,
 733                           V4L2_CID_RED_BALANCE, 0, 127, 1, 64);
 734         v4l2_ctrl_new_std(&info->hdl, &noon010_ctrl_ops,
 735                           V4L2_CID_BLUE_BALANCE, 0, 127, 1, 64);
 736
 737         sd->ctrl_handler = &info->hdl;
 738
 739         ret = info->hdl.error;
 740         if (ret)
 741                 goto np_err;
 742
 743         info->i2c_reg_page      = -1;
 744         info->gpio_nreset       = -EINVAL;
 745         info->gpio_nstby        = -EINVAL;
 746         info->curr_fmt          = &noon010_formats[0];
 747         info->curr_win          = &noon010_sizes[0];
 748
 749         if (gpio_is_valid(pdata->gpio_nreset)) {
 750                 ret = devm_gpio_request_one(&client->dev, pdata->gpio_nreset,
 751                                             GPIOF_OUT_INIT_LOW,
 752                                             "NOON010PC30 NRST");
 753                 if (ret) {
 754                         dev_err(&client->dev, "GPIO request error: %d\n", ret);
 755                         goto np_err;
 756                 }
 757                 info->gpio_nreset = pdata->gpio_nreset;
 758                 gpio_export(info->gpio_nreset, 0);
 759         }
 760
 761         if (gpio_is_valid(pdata->gpio_nstby)) {
 762                 ret = devm_gpio_request_one(&client->dev, pdata->gpio_nstby,
 763                                             GPIOF_OUT_INIT_LOW,
 764                                             "NOON010PC30 NSTBY");
 765                 if (ret) {
 766                         dev_err(&client->dev, "GPIO request error: %d\n", ret);
 767                         goto np_err;
 768                 }
 769                 info->gpio_nstby = pdata->gpio_nstby;
 770                 gpio_export(info->gpio_nstby, 0);
 771         }
 772
 773         for (i = 0; i < NOON010_NUM_SUPPLIES; i++)
 774                 info->supply[i].supply = noon010_supply_name[i];
 775
 776         ret = devm_regulator_bulk_get(&client->dev, NOON010_NUM_SUPPLIES,
 777                                  info->supply);
 778         if (ret)
 779                 goto np_err;
 780
 781         info->pad.flags = MEDIA_PAD_FL_SOURCE;
 782         sd->entity.type = MEDIA_ENT_T_V4L2_SUBDEV_SENSOR;
 783         ret = media_entity_init(&sd->entity, 1, &info->pad, 0);
 784         if (ret < 0)
 785                 goto np_err;
 786
 787         ret = noon010_detect(client, info);
 788         if (!ret)
 789                 return 0;
 790
 791 np_err:
 792         v4l2_ctrl_handler_free(&info->hdl);
 793         v4l2_device_unregister_subdev(sd);
 794         return ret;
 795 }
 796
 797 static int noon010_remove(struct i2c_client *client)
 798 {
 799         struct v4l2_subdev *sd = i2c_get_clientdata(client);
 800         struct noon010_info *info = to_noon010(sd);
 801
 802         v4l2_device_unregister_subdev(sd);
 803         v4l2_ctrl_handler_free(&info->hdl);
 804         media_entity_cleanup(&sd->entity);
 805
 806         return 0;
 807 }
 808
 809 static const struct i2c_device_id noon010_id[] = {
 810         { MODULE_NAME, 0 },
 811         { },
 812 };
 813 MODULE_DEVICE_TABLE(i2c, noon010_id);
 814
 815
 816 static struct i2c_driver noon010_i2c_driver = {
 817         .driver = {
 818                 .name = MODULE_NAME
 819         },
 820         .probe          = noon010_probe,
 821         .remove         = noon010_remove,
 822         .id_table       = noon010_id,
 823 };
 824
 825 module_i2c_driver(noon010_i2c_driver);
 826
 827 MODULE_DESCRIPTION("Siliconfile NOON010PC30 camera driver");
 828 MODULE_AUTHOR("Sylwester Nawrocki <s.nawrocki@samsung.com>");
 829 MODULE_LICENSE("GPL");