drivers/media/i2c/s5k6aa.c

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This source file includes following definitions.
ctrl_to_sd
to_s5k6aa
s5k6aa_presets_data_init
s5k6aa_i2c_read
s5k6aa_i2c_write
s5k6aa_write
s5k6aa_read
s5k6aa_write_array
s5k6aa_set_ahb_address
s5k6aa_configure_pixel_clocks
s5k6aa_set_mirror
s5k6aa_set_awb
s5k6aa_set_user_exposure
s5k6aa_set_user_gain
s5k6aa_set_auto_exposure
s5k6aa_set_anti_flicker
s5k6aa_set_colorfx
s5k6aa_preview_config_status
s5k6aa_get_pixfmt_index
s5k6aa_set_output_framefmt
s5k6aa_set_input_params
s5k6aa_configure_video_bus
s5k6aa_new_config_sync
s5k6aa_set_prev_config
s5k6aa_initialize_isp
s5k6aa_gpio_set_value
s5k6aa_gpio_assert
s5k6aa_gpio_deassert
__s5k6aa_power_on
__s5k6aa_power_off
s5k6aa_set_power
__s5k6aa_stream
s5k6aa_s_stream
s5k6aa_g_frame_interval
__s5k6aa_set_frame_interval
s5k6aa_s_frame_interval
s5k6aa_enum_frame_interval
s5k6aa_enum_mbus_code
s5k6aa_enum_frame_size
__s5k6aa_get_crop_rect
s5k6aa_try_format
s5k6aa_get_fmt
s5k6aa_set_fmt
s5k6aa_get_selection
s5k6aa_set_selection
s5k6aa_s_ctrl
s5k6aa_log_status
s5k6aa_initialize_ctrls
s5k6aa_open
s5k6aa_check_fw_revision
s5k6aa_registered
s5k6aa_configure_gpios
s5k6aa_probe
s5k6aa_remove
   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * Driver for Samsung S5K6AAFX SXGA 1/6" 1.3M CMOS Image Sensor
   4  * with embedded SoC ISP.
   5  *
   6  * Copyright (C) 2011, Samsung Electronics Co., Ltd.
   7  * Sylwester Nawrocki <s.nawrocki@samsung.com>
   8  *
   9  * Based on a driver authored by Dongsoo Nathaniel Kim.
  10  * Copyright (C) 2009, Dongsoo Nathaniel Kim <dongsoo45.kim@samsung.com>
  11  */
  12 
  13 #include <linux/clk.h>
  14 #include <linux/delay.h>
  15 #include <linux/gpio.h>
  16 #include <linux/i2c.h>
  17 #include <linux/media.h>
  18 #include <linux/module.h>
  19 #include <linux/regulator/consumer.h>
  20 #include <linux/slab.h>
  21 
  22 #include <media/media-entity.h>
  23 #include <media/v4l2-ctrls.h>
  24 #include <media/v4l2-device.h>
  25 #include <media/v4l2-subdev.h>
  26 #include <media/v4l2-mediabus.h>
  27 #include <media/i2c/s5k6aa.h>
  28 
  29 static int debug;
  30 module_param(debug, int, 0644);
  31 
  32 #define DRIVER_NAME                     "S5K6AA"
  33 
  34 /* The token to indicate array termination */
  35 #define S5K6AA_TERM                     0xffff
  36 #define S5K6AA_OUT_WIDTH_DEF            640
  37 #define S5K6AA_OUT_HEIGHT_DEF           480
  38 #define S5K6AA_WIN_WIDTH_MAX            1280
  39 #define S5K6AA_WIN_HEIGHT_MAX           1024
  40 #define S5K6AA_WIN_WIDTH_MIN            8
  41 #define S5K6AA_WIN_HEIGHT_MIN           8
  42 
  43 /*
  44  * H/W register Interface (0xD0000000 - 0xD0000FFF)
  45  */
  46 #define AHB_MSB_ADDR_PTR                0xfcfc
  47 #define GEN_REG_OFFSH                   0xd000
  48 #define REG_CMDWR_ADDRH                 0x0028
  49 #define REG_CMDWR_ADDRL                 0x002a
  50 #define REG_CMDRD_ADDRH                 0x002c
  51 #define REG_CMDRD_ADDRL                 0x002e
  52 #define REG_CMDBUF0_ADDR                0x0f12
  53 #define REG_CMDBUF1_ADDR                0x0f10
  54 
  55 /*
  56  * Host S/W Register interface (0x70000000 - 0x70002000)
  57  * The value of the two most significant address bytes is 0x7000,
  58  * (HOST_SWIF_OFFS_H). The register addresses below specify 2 LSBs.
  59  */
  60 #define HOST_SWIF_OFFSH                 0x7000
  61 
  62 /* Initialization parameters */
  63 /* Master clock frequency in KHz */
  64 #define REG_I_INCLK_FREQ_L              0x01b8
  65 #define REG_I_INCLK_FREQ_H              0x01ba
  66 #define  MIN_MCLK_FREQ_KHZ              6000U
  67 #define  MAX_MCLK_FREQ_KHZ              27000U
  68 #define REG_I_USE_NPVI_CLOCKS           0x01c6
  69 #define REG_I_USE_NMIPI_CLOCKS          0x01c8
  70 
  71 /* Clock configurations, n = 0..2. REG_I_* frequency unit is 4 kHz. */
  72 #define REG_I_OPCLK_4KHZ(n)             ((n) * 6 + 0x01cc)
  73 #define REG_I_MIN_OUTRATE_4KHZ(n)       ((n) * 6 + 0x01ce)
  74 #define REG_I_MAX_OUTRATE_4KHZ(n)       ((n) * 6 + 0x01d0)
  75 #define  SYS_PLL_OUT_FREQ               (48000000 / 4000)
  76 #define  PCLK_FREQ_MIN                  (24000000 / 4000)
  77 #define  PCLK_FREQ_MAX                  (48000000 / 4000)
  78 #define REG_I_INIT_PARAMS_UPDATED       0x01e0
  79 #define REG_I_ERROR_INFO                0x01e2
  80 
  81 /* General purpose parameters */
  82 #define REG_USER_BRIGHTNESS             0x01e4
  83 #define REG_USER_CONTRAST               0x01e6
  84 #define REG_USER_SATURATION             0x01e8
  85 #define REG_USER_SHARPBLUR              0x01ea
  86 
  87 #define REG_G_SPEC_EFFECTS              0x01ee
  88 #define REG_G_ENABLE_PREV               0x01f0
  89 #define REG_G_ENABLE_PREV_CHG           0x01f2
  90 #define REG_G_NEW_CFG_SYNC              0x01f8
  91 #define REG_G_PREVZOOM_IN_WIDTH         0x020a
  92 #define REG_G_PREVZOOM_IN_HEIGHT        0x020c
  93 #define REG_G_PREVZOOM_IN_XOFFS         0x020e
  94 #define REG_G_PREVZOOM_IN_YOFFS         0x0210
  95 #define REG_G_INPUTS_CHANGE_REQ         0x021a
  96 #define REG_G_ACTIVE_PREV_CFG           0x021c
  97 #define REG_G_PREV_CFG_CHG              0x021e
  98 #define REG_G_PREV_OPEN_AFTER_CH        0x0220
  99 #define REG_G_PREV_CFG_ERROR            0x0222
 100 
 101 /* Preview control section. n = 0...4. */
 102 #define PREG(n, x)                      ((n) * 0x26 + x)
 103 #define REG_P_OUT_WIDTH(n)              PREG(n, 0x0242)
 104 #define REG_P_OUT_HEIGHT(n)             PREG(n, 0x0244)
 105 #define REG_P_FMT(n)                    PREG(n, 0x0246)
 106 #define REG_P_MAX_OUT_RATE(n)           PREG(n, 0x0248)
 107 #define REG_P_MIN_OUT_RATE(n)           PREG(n, 0x024a)
 108 #define REG_P_PVI_MASK(n)               PREG(n, 0x024c)
 109 #define REG_P_CLK_INDEX(n)              PREG(n, 0x024e)
 110 #define REG_P_FR_RATE_TYPE(n)           PREG(n, 0x0250)
 111 #define  FR_RATE_DYNAMIC                0
 112 #define  FR_RATE_FIXED                  1
 113 #define  FR_RATE_FIXED_ACCURATE         2
 114 #define REG_P_FR_RATE_Q_TYPE(n)         PREG(n, 0x0252)
 115 #define  FR_RATE_Q_BEST_FRRATE          1 /* Binning enabled */
 116 #define  FR_RATE_Q_BEST_QUALITY         2 /* Binning disabled */
 117 /* Frame period in 0.1 ms units */
 118 #define REG_P_MAX_FR_TIME(n)            PREG(n, 0x0254)
 119 #define REG_P_MIN_FR_TIME(n)            PREG(n, 0x0256)
 120 /* Conversion to REG_P_[MAX/MIN]_FR_TIME value; __t: time in us */
 121 #define  US_TO_FR_TIME(__t)             ((__t) / 100)
 122 #define  S5K6AA_MIN_FR_TIME             33300  /* us */
 123 #define  S5K6AA_MAX_FR_TIME             650000 /* us */
 124 #define  S5K6AA_MAX_HIGHRES_FR_TIME     666    /* x100 us */
 125 /* The below 5 registers are for "device correction" values */
 126 #define REG_P_COLORTEMP(n)              PREG(n, 0x025e)
 127 #define REG_P_PREV_MIRROR(n)            PREG(n, 0x0262)
 128 
 129 /* Extended image property controls */
 130 /* Exposure time in 10 us units */
 131 #define REG_SF_USR_EXPOSURE_L           0x03c6
 132 #define REG_SF_USR_EXPOSURE_H           0x03c8
 133 #define REG_SF_USR_EXPOSURE_CHG         0x03ca
 134 #define REG_SF_USR_TOT_GAIN             0x03cc
 135 #define REG_SF_USR_TOT_GAIN_CHG         0x03ce
 136 #define REG_SF_RGAIN                    0x03d0
 137 #define REG_SF_RGAIN_CHG                0x03d2
 138 #define REG_SF_GGAIN                    0x03d4
 139 #define REG_SF_GGAIN_CHG                0x03d6
 140 #define REG_SF_BGAIN                    0x03d8
 141 #define REG_SF_BGAIN_CHG                0x03da
 142 #define REG_SF_FLICKER_QUANT            0x03dc
 143 #define REG_SF_FLICKER_QUANT_CHG        0x03de
 144 
 145 /* Output interface (parallel/MIPI) setup */
 146 #define REG_OIF_EN_MIPI_LANES           0x03fa
 147 #define REG_OIF_EN_PACKETS              0x03fc
 148 #define REG_OIF_CFG_CHG                 0x03fe
 149 
 150 /* Auto-algorithms enable mask */
 151 #define REG_DBG_AUTOALG_EN              0x0400
 152 #define  AALG_ALL_EN_MASK               (1 << 0)
 153 #define  AALG_AE_EN_MASK                (1 << 1)
 154 #define  AALG_DIVLEI_EN_MASK            (1 << 2)
 155 #define  AALG_WB_EN_MASK                (1 << 3)
 156 #define  AALG_FLICKER_EN_MASK           (1 << 5)
 157 #define  AALG_FIT_EN_MASK               (1 << 6)
 158 #define  AALG_WRHW_EN_MASK              (1 << 7)
 159 
 160 /* Firmware revision information */
 161 #define REG_FW_APIVER                   0x012e
 162 #define  S5K6AAFX_FW_APIVER             0x0001
 163 #define REG_FW_REVISION                 0x0130
 164 
 165 /* For now we use only one user configuration register set */
 166 #define S5K6AA_MAX_PRESETS              1
 167 
 168 static const char * const s5k6aa_supply_names[] = {
 169         "vdd_core",     /* Digital core supply 1.5V (1.4V to 1.6V) */
 170         "vdda",         /* Analog power supply 2.8V (2.6V to 3.0V) */
 171         "vdd_reg",      /* Regulator input power 1.8V (1.7V to 1.9V)
 172                            or 2.8V (2.6V to 3.0) */
 173         "vddio",        /* I/O supply 1.8V (1.65V to 1.95V)
 174                            or 2.8V (2.5V to 3.1V) */
 175 };
 176 #define S5K6AA_NUM_SUPPLIES ARRAY_SIZE(s5k6aa_supply_names)
 177 
 178 enum s5k6aa_gpio_id {
 179         STBY,
 180         RST,
 181         GPIO_NUM,
 182 };
 183 
 184 struct s5k6aa_regval {
 185         u16 addr;
 186         u16 val;
 187 };
 188 
 189 struct s5k6aa_pixfmt {
 190         u32 code;
 191         u32 colorspace;
 192         /* REG_P_FMT(x) register value */
 193         u16 reg_p_fmt;
 194 };
 195 
 196 struct s5k6aa_preset {
 197         /* output pixel format and resolution */
 198         struct v4l2_mbus_framefmt mbus_fmt;
 199         u8 clk_id;
 200         u8 index;
 201 };
 202 
 203 struct s5k6aa_ctrls {
 204         struct v4l2_ctrl_handler handler;
 205         /* Auto / manual white balance cluster */
 206         struct v4l2_ctrl *awb;
 207         struct v4l2_ctrl *gain_red;
 208         struct v4l2_ctrl *gain_blue;
 209         struct v4l2_ctrl *gain_green;
 210         /* Mirror cluster */
 211         struct v4l2_ctrl *hflip;
 212         struct v4l2_ctrl *vflip;
 213         /* Auto exposure / manual exposure and gain cluster */
 214         struct v4l2_ctrl *auto_exp;
 215         struct v4l2_ctrl *exposure;
 216         struct v4l2_ctrl *gain;
 217 };
 218 
 219 struct s5k6aa_interval {
 220         u16 reg_fr_time;
 221         struct v4l2_fract interval;
 222         /* Maximum rectangle for the interval */
 223         struct v4l2_frmsize_discrete size;
 224 };
 225 
 226 struct s5k6aa {
 227         struct v4l2_subdev sd;
 228         struct media_pad pad;
 229 
 230         enum v4l2_mbus_type bus_type;
 231         u8 mipi_lanes;
 232 
 233         int (*s_power)(int enable);
 234         struct regulator_bulk_data supplies[S5K6AA_NUM_SUPPLIES];
 235         struct s5k6aa_gpio gpio[GPIO_NUM];
 236 
 237         /* external master clock frequency */
 238         unsigned long mclk_frequency;
 239         /* ISP internal master clock frequency */
 240         u16 clk_fop;
 241         /* output pixel clock frequency range */
 242         u16 pclk_fmin;
 243         u16 pclk_fmax;
 244 
 245         unsigned int inv_hflip:1;
 246         unsigned int inv_vflip:1;
 247 
 248         /* protects the struct members below */
 249         struct mutex lock;
 250 
 251         /* sensor matrix scan window */
 252         struct v4l2_rect ccd_rect;
 253 
 254         struct s5k6aa_ctrls ctrls;
 255         struct s5k6aa_preset presets[S5K6AA_MAX_PRESETS];
 256         struct s5k6aa_preset *preset;
 257         const struct s5k6aa_interval *fiv;
 258 
 259         unsigned int streaming:1;
 260         unsigned int apply_cfg:1;
 261         unsigned int apply_crop:1;
 262         unsigned int power;
 263 };
 264 
 265 static struct s5k6aa_regval s5k6aa_analog_config[] = {
 266         /* Analog settings */
 267         { 0x112a, 0x0000 }, { 0x1132, 0x0000 },
 268         { 0x113e, 0x0000 }, { 0x115c, 0x0000 },
 269         { 0x1164, 0x0000 }, { 0x1174, 0x0000 },
 270         { 0x1178, 0x0000 }, { 0x077a, 0x0000 },
 271         { 0x077c, 0x0000 }, { 0x077e, 0x0000 },
 272         { 0x0780, 0x0000 }, { 0x0782, 0x0000 },
 273         { 0x0784, 0x0000 }, { 0x0786, 0x0000 },
 274         { 0x0788, 0x0000 }, { 0x07a2, 0x0000 },
 275         { 0x07a4, 0x0000 }, { 0x07a6, 0x0000 },
 276         { 0x07a8, 0x0000 }, { 0x07b6, 0x0000 },
 277         { 0x07b8, 0x0002 }, { 0x07ba, 0x0004 },
 278         { 0x07bc, 0x0004 }, { 0x07be, 0x0005 },
 279         { 0x07c0, 0x0005 }, { S5K6AA_TERM, 0 },
 280 };
 281 
 282 /* TODO: Add RGB888 and Bayer format */
 283 static const struct s5k6aa_pixfmt s5k6aa_formats[] = {
 284         { MEDIA_BUS_FMT_YUYV8_2X8,      V4L2_COLORSPACE_JPEG,   5 },
 285         /* range 16-240 */
 286         { MEDIA_BUS_FMT_YUYV8_2X8,      V4L2_COLORSPACE_REC709, 6 },
 287         { MEDIA_BUS_FMT_RGB565_2X8_BE,  V4L2_COLORSPACE_JPEG,   0 },
 288 };
 289 
 290 static const struct s5k6aa_interval s5k6aa_intervals[] = {
 291         { 1000, {10000, 1000000}, {1280, 1024} }, /* 10 fps */
 292         { 666,  {15000, 1000000}, {1280, 1024} }, /* 15 fps */
 293         { 500,  {20000, 1000000}, {1280, 720} },  /* 20 fps */
 294         { 400,  {25000, 1000000}, {640, 480} },   /* 25 fps */
 295         { 333,  {33300, 1000000}, {640, 480} },   /* 30 fps */
 296 };
 297 
 298 #define S5K6AA_INTERVAL_DEF_INDEX 1 /* 15 fps */
 299 
 300 static inline struct v4l2_subdev *ctrl_to_sd(struct v4l2_ctrl *ctrl)
 301 {
 302         return &container_of(ctrl->handler, struct s5k6aa, ctrls.handler)->sd;
 303 }
 304 
 305 static inline struct s5k6aa *to_s5k6aa(struct v4l2_subdev *sd)
 306 {
 307         return container_of(sd, struct s5k6aa, sd);
 308 }
 309 
 310 /* Set initial values for all preview presets */
 311 static void s5k6aa_presets_data_init(struct s5k6aa *s5k6aa)
 312 {
 313         struct s5k6aa_preset *preset = &s5k6aa->presets[0];
 314         int i;
 315 
 316         for (i = 0; i < S5K6AA_MAX_PRESETS; i++) {
 317                 preset->mbus_fmt.width  = S5K6AA_OUT_WIDTH_DEF;
 318                 preset->mbus_fmt.height = S5K6AA_OUT_HEIGHT_DEF;
 319                 preset->mbus_fmt.code   = s5k6aa_formats[0].code;
 320                 preset->index           = i;
 321                 preset->clk_id          = 0;
 322                 preset++;
 323         }
 324 
 325         s5k6aa->fiv = &s5k6aa_intervals[S5K6AA_INTERVAL_DEF_INDEX];
 326         s5k6aa->preset = &s5k6aa->presets[0];
 327 }
 328 
 329 static int s5k6aa_i2c_read(struct i2c_client *client, u16 addr, u16 *val)
 330 {
 331         u8 wbuf[2] = {addr >> 8, addr & 0xFF};
 332         struct i2c_msg msg[2];
 333         u8 rbuf[2];
 334         int ret;
 335 
 336         msg[0].addr = client->addr;
 337         msg[0].flags = 0;
 338         msg[0].len = 2;
 339         msg[0].buf = wbuf;
 340 
 341         msg[1].addr = client->addr;
 342         msg[1].flags = I2C_M_RD;
 343         msg[1].len = 2;
 344         msg[1].buf = rbuf;
 345 
 346         ret = i2c_transfer(client->adapter, msg, 2);
 347         *val = be16_to_cpu(*((__be16 *)rbuf));
 348 
 349         v4l2_dbg(3, debug, client, "i2c_read: 0x%04X : 0x%04x\n", addr, *val);
 350 
 351         return ret == 2 ? 0 : ret;
 352 }
 353 
 354 static int s5k6aa_i2c_write(struct i2c_client *client, u16 addr, u16 val)
 355 {
 356         u8 buf[4] = {addr >> 8, addr & 0xFF, val >> 8, val & 0xFF};
 357 
 358         int ret = i2c_master_send(client, buf, 4);
 359         v4l2_dbg(3, debug, client, "i2c_write: 0x%04X : 0x%04x\n", addr, val);
 360 
 361         return ret == 4 ? 0 : ret;
 362 }
 363 
 364 /* The command register write, assumes Command_Wr_addH = 0x7000. */
 365 static int s5k6aa_write(struct i2c_client *c, u16 addr, u16 val)
 366 {
 367         int ret = s5k6aa_i2c_write(c, REG_CMDWR_ADDRL, addr);
 368         if (ret)
 369                 return ret;
 370         return s5k6aa_i2c_write(c, REG_CMDBUF0_ADDR, val);
 371 }
 372 
 373 /* The command register read, assumes Command_Rd_addH = 0x7000. */
 374 static int s5k6aa_read(struct i2c_client *client, u16 addr, u16 *val)
 375 {
 376         int ret = s5k6aa_i2c_write(client, REG_CMDRD_ADDRL, addr);
 377         if (ret)
 378                 return ret;
 379         return s5k6aa_i2c_read(client, REG_CMDBUF0_ADDR, val);
 380 }
 381 
 382 static int s5k6aa_write_array(struct v4l2_subdev *sd,
 383                               const struct s5k6aa_regval *msg)
 384 {
 385         struct i2c_client *client = v4l2_get_subdevdata(sd);
 386         u16 addr_incr = 0;
 387         int ret = 0;
 388 
 389         while (msg->addr != S5K6AA_TERM) {
 390                 if (addr_incr != 2)
 391                         ret = s5k6aa_i2c_write(client, REG_CMDWR_ADDRL,
 392                                                msg->addr);
 393                 if (ret)
 394                         break;
 395                 ret = s5k6aa_i2c_write(client, REG_CMDBUF0_ADDR, msg->val);
 396                 if (ret)
 397                         break;
 398                 /* Assume that msg->addr is always less than 0xfffc */
 399                 addr_incr = (msg + 1)->addr - msg->addr;
 400                 msg++;
 401         }
 402 
 403         return ret;
 404 }
 405 
 406 /* Configure the AHB high address bytes for GTG registers access */
 407 static int s5k6aa_set_ahb_address(struct i2c_client *client)
 408 {
 409         int ret = s5k6aa_i2c_write(client, AHB_MSB_ADDR_PTR, GEN_REG_OFFSH);
 410         if (ret)
 411                 return ret;
 412         ret = s5k6aa_i2c_write(client, REG_CMDRD_ADDRH, HOST_SWIF_OFFSH);
 413         if (ret)
 414                 return ret;
 415         return s5k6aa_i2c_write(client, REG_CMDWR_ADDRH, HOST_SWIF_OFFSH);
 416 }
 417 
 418 /**
 419  * s5k6aa_configure_pixel_clock - apply ISP main clock/PLL configuration
 420  * @s5k6aa: pointer to &struct s5k6aa describing the device
 421  *
 422  * Configure the internal ISP PLL for the required output frequency.
 423  * Locking: called with s5k6aa.lock mutex held.
 424  */
 425 static int s5k6aa_configure_pixel_clocks(struct s5k6aa *s5k6aa)
 426 {
 427         struct i2c_client *c = v4l2_get_subdevdata(&s5k6aa->sd);
 428         unsigned long fmclk = s5k6aa->mclk_frequency / 1000;
 429         u16 status;
 430         int ret;
 431 
 432         if (WARN(fmclk < MIN_MCLK_FREQ_KHZ || fmclk > MAX_MCLK_FREQ_KHZ,
 433                  "Invalid clock frequency: %ld\n", fmclk))
 434                 return -EINVAL;
 435 
 436         s5k6aa->pclk_fmin = PCLK_FREQ_MIN;
 437         s5k6aa->pclk_fmax = PCLK_FREQ_MAX;
 438         s5k6aa->clk_fop = SYS_PLL_OUT_FREQ;
 439 
 440         /* External input clock frequency in kHz */
 441         ret = s5k6aa_write(c, REG_I_INCLK_FREQ_H, fmclk >> 16);
 442         if (!ret)
 443                 ret = s5k6aa_write(c, REG_I_INCLK_FREQ_L, fmclk & 0xFFFF);
 444         if (!ret)
 445                 ret = s5k6aa_write(c, REG_I_USE_NPVI_CLOCKS, 1);
 446         /* Internal PLL frequency */
 447         if (!ret)
 448                 ret = s5k6aa_write(c, REG_I_OPCLK_4KHZ(0), s5k6aa->clk_fop);
 449         if (!ret)
 450                 ret = s5k6aa_write(c, REG_I_MIN_OUTRATE_4KHZ(0),
 451                                    s5k6aa->pclk_fmin);
 452         if (!ret)
 453                 ret = s5k6aa_write(c, REG_I_MAX_OUTRATE_4KHZ(0),
 454                                    s5k6aa->pclk_fmax);
 455         if (!ret)
 456                 ret = s5k6aa_write(c, REG_I_INIT_PARAMS_UPDATED, 1);
 457         if (!ret)
 458                 ret = s5k6aa_read(c, REG_I_ERROR_INFO, &status);
 459 
 460         return ret ? ret : (status ? -EINVAL : 0);
 461 }
 462 
 463 /* Set horizontal and vertical image flipping */
 464 static int s5k6aa_set_mirror(struct s5k6aa *s5k6aa, int horiz_flip)
 465 {
 466         struct i2c_client *client = v4l2_get_subdevdata(&s5k6aa->sd);
 467         int index = s5k6aa->preset->index;
 468 
 469         unsigned int vflip = s5k6aa->ctrls.vflip->val ^ s5k6aa->inv_vflip;
 470         unsigned int flip = (horiz_flip ^ s5k6aa->inv_hflip) | (vflip << 1);
 471 
 472         return s5k6aa_write(client, REG_P_PREV_MIRROR(index), flip);
 473 }
 474 
 475 /* Configure auto/manual white balance and R/G/B gains */
 476 static int s5k6aa_set_awb(struct s5k6aa *s5k6aa, int awb)
 477 {
 478         struct i2c_client *c = v4l2_get_subdevdata(&s5k6aa->sd);
 479         struct s5k6aa_ctrls *ctrls = &s5k6aa->ctrls;
 480         u16 reg;
 481 
 482         int ret = s5k6aa_read(c, REG_DBG_AUTOALG_EN, &reg);
 483 
 484         if (!ret && !awb) {
 485                 ret = s5k6aa_write(c, REG_SF_RGAIN, ctrls->gain_red->val);
 486                 if (!ret)
 487                         ret = s5k6aa_write(c, REG_SF_RGAIN_CHG, 1);
 488                 if (ret)
 489                         return ret;
 490 
 491                 ret = s5k6aa_write(c, REG_SF_GGAIN, ctrls->gain_green->val);
 492                 if (!ret)
 493                         ret = s5k6aa_write(c, REG_SF_GGAIN_CHG, 1);
 494                 if (ret)
 495                         return ret;
 496 
 497                 ret = s5k6aa_write(c, REG_SF_BGAIN, ctrls->gain_blue->val);
 498                 if (!ret)
 499                         ret = s5k6aa_write(c, REG_SF_BGAIN_CHG, 1);
 500         }
 501         if (!ret) {
 502                 reg = awb ? reg | AALG_WB_EN_MASK : reg & ~AALG_WB_EN_MASK;
 503                 ret = s5k6aa_write(c, REG_DBG_AUTOALG_EN, reg);
 504         }
 505 
 506         return ret;
 507 }
 508 
 509 /* Program FW with exposure time, 'exposure' in us units */
 510 static int s5k6aa_set_user_exposure(struct i2c_client *client, int exposure)
 511 {
 512         unsigned int time = exposure / 10;
 513 
 514         int ret = s5k6aa_write(client, REG_SF_USR_EXPOSURE_L, time & 0xffff);
 515         if (!ret)
 516                 ret = s5k6aa_write(client, REG_SF_USR_EXPOSURE_H, time >> 16);
 517         if (ret)
 518                 return ret;
 519         return s5k6aa_write(client, REG_SF_USR_EXPOSURE_CHG, 1);
 520 }
 521 
 522 static int s5k6aa_set_user_gain(struct i2c_client *client, int gain)
 523 {
 524         int ret = s5k6aa_write(client, REG_SF_USR_TOT_GAIN, gain);
 525         if (ret)
 526                 return ret;
 527         return s5k6aa_write(client, REG_SF_USR_TOT_GAIN_CHG, 1);
 528 }
 529 
 530 /* Set auto/manual exposure and total gain */
 531 static int s5k6aa_set_auto_exposure(struct s5k6aa *s5k6aa, int value)
 532 {
 533         struct i2c_client *c = v4l2_get_subdevdata(&s5k6aa->sd);
 534         unsigned int exp_time = s5k6aa->ctrls.exposure->val;
 535         u16 auto_alg;
 536 
 537         int ret = s5k6aa_read(c, REG_DBG_AUTOALG_EN, &auto_alg);
 538         if (ret)
 539                 return ret;
 540 
 541         v4l2_dbg(1, debug, c, "man_exp: %d, auto_exp: %d, a_alg: 0x%x\n",
 542                  exp_time, value, auto_alg);
 543 
 544         if (value == V4L2_EXPOSURE_AUTO) {
 545                 auto_alg |= AALG_AE_EN_MASK | AALG_DIVLEI_EN_MASK;
 546         } else {
 547                 ret = s5k6aa_set_user_exposure(c, exp_time);
 548                 if (ret)
 549                         return ret;
 550                 ret = s5k6aa_set_user_gain(c, s5k6aa->ctrls.gain->val);
 551                 if (ret)
 552                         return ret;
 553                 auto_alg &= ~(AALG_AE_EN_MASK | AALG_DIVLEI_EN_MASK);
 554         }
 555 
 556         return s5k6aa_write(c, REG_DBG_AUTOALG_EN, auto_alg);
 557 }
 558 
 559 static int s5k6aa_set_anti_flicker(struct s5k6aa *s5k6aa, int value)
 560 {
 561         struct i2c_client *client = v4l2_get_subdevdata(&s5k6aa->sd);
 562         u16 auto_alg;
 563         int ret;
 564 
 565         ret = s5k6aa_read(client, REG_DBG_AUTOALG_EN, &auto_alg);
 566         if (ret)
 567                 return ret;
 568 
 569         if (value == V4L2_CID_POWER_LINE_FREQUENCY_AUTO) {
 570                 auto_alg |= AALG_FLICKER_EN_MASK;
 571         } else {
 572                 auto_alg &= ~AALG_FLICKER_EN_MASK;
 573                 /* The V4L2_CID_LINE_FREQUENCY control values match
 574                  * the register values */
 575                 ret = s5k6aa_write(client, REG_SF_FLICKER_QUANT, value);
 576                 if (ret)
 577                         return ret;
 578                 ret = s5k6aa_write(client, REG_SF_FLICKER_QUANT_CHG, 1);
 579                 if (ret)
 580                         return ret;
 581         }
 582 
 583         return s5k6aa_write(client, REG_DBG_AUTOALG_EN, auto_alg);
 584 }
 585 
 586 static int s5k6aa_set_colorfx(struct s5k6aa *s5k6aa, int val)
 587 {
 588         struct i2c_client *client = v4l2_get_subdevdata(&s5k6aa->sd);
 589         static const struct v4l2_control colorfx[] = {
 590                 { V4L2_COLORFX_NONE,     0 },
 591                 { V4L2_COLORFX_BW,       1 },
 592                 { V4L2_COLORFX_NEGATIVE, 2 },
 593                 { V4L2_COLORFX_SEPIA,    3 },
 594                 { V4L2_COLORFX_SKY_BLUE, 4 },
 595                 { V4L2_COLORFX_SKETCH,   5 },
 596         };
 597         int i;
 598 
 599         for (i = 0; i < ARRAY_SIZE(colorfx); i++) {
 600                 if (colorfx[i].id == val)
 601                         return s5k6aa_write(client, REG_G_SPEC_EFFECTS,
 602                                             colorfx[i].value);
 603         }
 604         return -EINVAL;
 605 }
 606 
 607 static int s5k6aa_preview_config_status(struct i2c_client *client)
 608 {
 609         u16 error = 0;
 610         int ret = s5k6aa_read(client, REG_G_PREV_CFG_ERROR, &error);
 611 
 612         v4l2_dbg(1, debug, client, "error: 0x%x (%d)\n", error, ret);
 613         return ret ? ret : (error ? -EINVAL : 0);
 614 }
 615 
 616 static int s5k6aa_get_pixfmt_index(struct s5k6aa *s5k6aa,
 617                                    struct v4l2_mbus_framefmt *mf)
 618 {
 619         unsigned int i;
 620 
 621         for (i = 0; i < ARRAY_SIZE(s5k6aa_formats); i++)
 622                 if (mf->colorspace == s5k6aa_formats[i].colorspace &&
 623                     mf->code == s5k6aa_formats[i].code)
 624                         return i;
 625         return 0;
 626 }
 627 
 628 static int s5k6aa_set_output_framefmt(struct s5k6aa *s5k6aa,
 629                                       struct s5k6aa_preset *preset)
 630 {
 631         struct i2c_client *client = v4l2_get_subdevdata(&s5k6aa->sd);
 632         int fmt_index = s5k6aa_get_pixfmt_index(s5k6aa, &preset->mbus_fmt);
 633         int ret;
 634 
 635         ret = s5k6aa_write(client, REG_P_OUT_WIDTH(preset->index),
 636                            preset->mbus_fmt.width);
 637         if (!ret)
 638                 ret = s5k6aa_write(client, REG_P_OUT_HEIGHT(preset->index),
 639                                    preset->mbus_fmt.height);
 640         if (!ret)
 641                 ret = s5k6aa_write(client, REG_P_FMT(preset->index),
 642                                    s5k6aa_formats[fmt_index].reg_p_fmt);
 643         return ret;
 644 }
 645 
 646 static int s5k6aa_set_input_params(struct s5k6aa *s5k6aa)
 647 {
 648         struct i2c_client *c = v4l2_get_subdevdata(&s5k6aa->sd);
 649         struct v4l2_rect *r = &s5k6aa->ccd_rect;
 650         int ret;
 651 
 652         ret = s5k6aa_write(c, REG_G_PREVZOOM_IN_WIDTH, r->width);
 653         if (!ret)
 654                 ret = s5k6aa_write(c, REG_G_PREVZOOM_IN_HEIGHT, r->height);
 655         if (!ret)
 656                 ret = s5k6aa_write(c, REG_G_PREVZOOM_IN_XOFFS, r->left);
 657         if (!ret)
 658                 ret = s5k6aa_write(c, REG_G_PREVZOOM_IN_YOFFS, r->top);
 659         if (!ret)
 660                 ret = s5k6aa_write(c, REG_G_INPUTS_CHANGE_REQ, 1);
 661         if (!ret)
 662                 s5k6aa->apply_crop = 0;
 663 
 664         return ret;
 665 }
 666 
 667 /**
 668  * s5k6aa_configure_video_bus - configure the video output interface
 669  * @s5k6aa: pointer to &struct s5k6aa describing the device
 670  * @bus_type: video bus type: parallel or MIPI-CSI
 671  * @nlanes: number of MIPI lanes to be used (MIPI-CSI only)
 672  *
 673  * Note: Only parallel bus operation has been tested.
 674  */
 675 static int s5k6aa_configure_video_bus(struct s5k6aa *s5k6aa,
 676                                       enum v4l2_mbus_type bus_type, int nlanes)
 677 {
 678         struct i2c_client *client = v4l2_get_subdevdata(&s5k6aa->sd);
 679         u16 cfg = 0;
 680         int ret;
 681 
 682         /*
 683          * TODO: The sensor is supposed to support BT.601 and BT.656
 684          * but there is nothing indicating how to switch between both
 685          * in the datasheet. For now default BT.601 interface is assumed.
 686          */
 687         if (bus_type == V4L2_MBUS_CSI2_DPHY)
 688                 cfg = nlanes;
 689         else if (bus_type != V4L2_MBUS_PARALLEL)
 690                 return -EINVAL;
 691 
 692         ret = s5k6aa_write(client, REG_OIF_EN_MIPI_LANES, cfg);
 693         if (ret)
 694                 return ret;
 695         return s5k6aa_write(client, REG_OIF_CFG_CHG, 1);
 696 }
 697 
 698 /* This function should be called when switching to new user configuration set*/
 699 static int s5k6aa_new_config_sync(struct i2c_client *client, int timeout,
 700                                   int cid)
 701 {
 702         unsigned long end = jiffies + msecs_to_jiffies(timeout);
 703         u16 reg = 1;
 704         int ret;
 705 
 706         ret = s5k6aa_write(client, REG_G_ACTIVE_PREV_CFG, cid);
 707         if (!ret)
 708                 ret = s5k6aa_write(client, REG_G_PREV_CFG_CHG, 1);
 709         if (!ret)
 710                 ret = s5k6aa_write(client, REG_G_NEW_CFG_SYNC, 1);
 711         if (timeout == 0)
 712                 return ret;
 713 
 714         while (ret >= 0 && time_is_after_jiffies(end)) {
 715                 ret = s5k6aa_read(client, REG_G_NEW_CFG_SYNC, &reg);
 716                 if (!reg)
 717                         return 0;
 718                 usleep_range(1000, 5000);
 719         }
 720         return ret ? ret : -ETIMEDOUT;
 721 }
 722 
 723 /**
 724  * s5k6aa_set_prev_config - write user preview register set
 725  * @s5k6aa: pointer to &struct s5k6aa describing the device
 726  * @preset: s5kaa preset to be applied
 727  *
 728  * Configure output resolution and color format, pixel clock
 729  * frequency range, device frame rate type and frame period range.
 730  */
 731 static int s5k6aa_set_prev_config(struct s5k6aa *s5k6aa,
 732                                   struct s5k6aa_preset *preset)
 733 {
 734         struct i2c_client *client = v4l2_get_subdevdata(&s5k6aa->sd);
 735         int idx = preset->index;
 736         u16 frame_rate_q;
 737         int ret;
 738 
 739         if (s5k6aa->fiv->reg_fr_time >= S5K6AA_MAX_HIGHRES_FR_TIME)
 740                 frame_rate_q = FR_RATE_Q_BEST_FRRATE;
 741         else
 742                 frame_rate_q = FR_RATE_Q_BEST_QUALITY;
 743 
 744         ret = s5k6aa_set_output_framefmt(s5k6aa, preset);
 745         if (!ret)
 746                 ret = s5k6aa_write(client, REG_P_MAX_OUT_RATE(idx),
 747                                    s5k6aa->pclk_fmax);
 748         if (!ret)
 749                 ret = s5k6aa_write(client, REG_P_MIN_OUT_RATE(idx),
 750                                    s5k6aa->pclk_fmin);
 751         if (!ret)
 752                 ret = s5k6aa_write(client, REG_P_CLK_INDEX(idx),
 753                                    preset->clk_id);
 754         if (!ret)
 755                 ret = s5k6aa_write(client, REG_P_FR_RATE_TYPE(idx),
 756                                    FR_RATE_DYNAMIC);
 757         if (!ret)
 758                 ret = s5k6aa_write(client, REG_P_FR_RATE_Q_TYPE(idx),
 759                                    frame_rate_q);
 760         if (!ret)
 761                 ret = s5k6aa_write(client, REG_P_MAX_FR_TIME(idx),
 762                                    s5k6aa->fiv->reg_fr_time + 33);
 763         if (!ret)
 764                 ret = s5k6aa_write(client, REG_P_MIN_FR_TIME(idx),
 765                                    s5k6aa->fiv->reg_fr_time - 33);
 766         if (!ret)
 767                 ret = s5k6aa_new_config_sync(client, 250, idx);
 768         if (!ret)
 769                 ret = s5k6aa_preview_config_status(client);
 770         if (!ret)
 771                 s5k6aa->apply_cfg = 0;
 772 
 773         v4l2_dbg(1, debug, client, "Frame interval: %d +/- 3.3ms. (%d)\n",
 774                  s5k6aa->fiv->reg_fr_time, ret);
 775         return ret;
 776 }
 777 
 778 /**
 779  * s5k6aa_initialize_isp - basic ISP MCU initialization
 780  * @sd: pointer to V4L2 sub-device descriptor
 781  *
 782  * Configure AHB addresses for registers read/write; configure PLLs for
 783  * required output pixel clock. The ISP power supply needs to be already
 784  * enabled, with an optional H/W reset.
 785  * Locking: called with s5k6aa.lock mutex held.
 786  */
 787 static int s5k6aa_initialize_isp(struct v4l2_subdev *sd)
 788 {
 789         struct i2c_client *client = v4l2_get_subdevdata(sd);
 790         struct s5k6aa *s5k6aa = to_s5k6aa(sd);
 791         int ret;
 792 
 793         s5k6aa->apply_crop = 1;
 794         s5k6aa->apply_cfg = 1;
 795         msleep(100);
 796 
 797         ret = s5k6aa_set_ahb_address(client);
 798         if (ret)
 799                 return ret;
 800         ret = s5k6aa_configure_video_bus(s5k6aa, s5k6aa->bus_type,
 801                                          s5k6aa->mipi_lanes);
 802         if (ret)
 803                 return ret;
 804         ret = s5k6aa_write_array(sd, s5k6aa_analog_config);
 805         if (ret)
 806                 return ret;
 807         msleep(20);
 808 
 809         return s5k6aa_configure_pixel_clocks(s5k6aa);
 810 }
 811 
 812 static int s5k6aa_gpio_set_value(struct s5k6aa *priv, int id, u32 val)
 813 {
 814         if (!gpio_is_valid(priv->gpio[id].gpio))
 815                 return 0;
 816         gpio_set_value(priv->gpio[id].gpio, !!val);
 817         return 1;
 818 }
 819 
 820 static int s5k6aa_gpio_assert(struct s5k6aa *priv, int id)
 821 {
 822         return s5k6aa_gpio_set_value(priv, id, priv->gpio[id].level);
 823 }
 824 
 825 static int s5k6aa_gpio_deassert(struct s5k6aa *priv, int id)
 826 {
 827         return s5k6aa_gpio_set_value(priv, id, !priv->gpio[id].level);
 828 }
 829 
 830 static int __s5k6aa_power_on(struct s5k6aa *s5k6aa)
 831 {
 832         int ret;
 833 
 834         ret = regulator_bulk_enable(S5K6AA_NUM_SUPPLIES, s5k6aa->supplies);
 835         if (ret)
 836                 return ret;
 837         if (s5k6aa_gpio_deassert(s5k6aa, STBY))
 838                 usleep_range(150, 200);
 839 
 840         if (s5k6aa->s_power)
 841                 ret = s5k6aa->s_power(1);
 842         usleep_range(4000, 5000);
 843 
 844         if (s5k6aa_gpio_deassert(s5k6aa, RST))
 845                 msleep(20);
 846 
 847         return ret;
 848 }
 849 
 850 static int __s5k6aa_power_off(struct s5k6aa *s5k6aa)
 851 {
 852         int ret;
 853 
 854         if (s5k6aa_gpio_assert(s5k6aa, RST))
 855                 usleep_range(100, 150);
 856 
 857         if (s5k6aa->s_power) {
 858                 ret = s5k6aa->s_power(0);
 859                 if (ret)
 860                         return ret;
 861         }
 862         if (s5k6aa_gpio_assert(s5k6aa, STBY))
 863                 usleep_range(50, 100);
 864         s5k6aa->streaming = 0;
 865 
 866         return regulator_bulk_disable(S5K6AA_NUM_SUPPLIES, s5k6aa->supplies);
 867 }
 868 
 869 /*
 870  * V4L2 subdev core and video operations
 871  */
 872 static int s5k6aa_set_power(struct v4l2_subdev *sd, int on)
 873 {
 874         struct s5k6aa *s5k6aa = to_s5k6aa(sd);
 875         int ret = 0;
 876 
 877         mutex_lock(&s5k6aa->lock);
 878 
 879         if (s5k6aa->power == !on) {
 880                 if (on) {
 881                         ret = __s5k6aa_power_on(s5k6aa);
 882                         if (!ret)
 883                                 ret = s5k6aa_initialize_isp(sd);
 884                 } else {
 885                         ret = __s5k6aa_power_off(s5k6aa);
 886                 }
 887 
 888                 if (!ret)
 889                         s5k6aa->power += on ? 1 : -1;
 890         }
 891 
 892         mutex_unlock(&s5k6aa->lock);
 893 
 894         if (!on || ret || s5k6aa->power != 1)
 895                 return ret;
 896 
 897         return v4l2_ctrl_handler_setup(sd->ctrl_handler);
 898 }
 899 
 900 static int __s5k6aa_stream(struct s5k6aa *s5k6aa, int enable)
 901 {
 902         struct i2c_client *client = v4l2_get_subdevdata(&s5k6aa->sd);
 903         int ret = 0;
 904 
 905         ret = s5k6aa_write(client, REG_G_ENABLE_PREV, enable);
 906         if (!ret)
 907                 ret = s5k6aa_write(client, REG_G_ENABLE_PREV_CHG, 1);
 908         if (!ret)
 909                 s5k6aa->streaming = enable;
 910 
 911         return ret;
 912 }
 913 
 914 static int s5k6aa_s_stream(struct v4l2_subdev *sd, int on)
 915 {
 916         struct s5k6aa *s5k6aa = to_s5k6aa(sd);
 917         int ret = 0;
 918 
 919         mutex_lock(&s5k6aa->lock);
 920 
 921         if (s5k6aa->streaming == !on) {
 922                 if (!ret && s5k6aa->apply_cfg)
 923                         ret = s5k6aa_set_prev_config(s5k6aa, s5k6aa->preset);
 924                 if (s5k6aa->apply_crop)
 925                         ret = s5k6aa_set_input_params(s5k6aa);
 926                 if (!ret)
 927                         ret = __s5k6aa_stream(s5k6aa, !!on);
 928         }
 929         mutex_unlock(&s5k6aa->lock);
 930 
 931         return ret;
 932 }
 933 
 934 static int s5k6aa_g_frame_interval(struct v4l2_subdev *sd,
 935                                    struct v4l2_subdev_frame_interval *fi)
 936 {
 937         struct s5k6aa *s5k6aa = to_s5k6aa(sd);
 938 
 939         mutex_lock(&s5k6aa->lock);
 940         fi->interval = s5k6aa->fiv->interval;
 941         mutex_unlock(&s5k6aa->lock);
 942 
 943         return 0;
 944 }
 945 
 946 static int __s5k6aa_set_frame_interval(struct s5k6aa *s5k6aa,
 947                                        struct v4l2_subdev_frame_interval *fi)
 948 {
 949         struct v4l2_mbus_framefmt *mbus_fmt = &s5k6aa->preset->mbus_fmt;
 950         const struct s5k6aa_interval *fiv = &s5k6aa_intervals[0];
 951         unsigned int err, min_err = UINT_MAX;
 952         unsigned int i, fr_time;
 953 
 954         if (fi->interval.denominator == 0)
 955                 return -EINVAL;
 956 
 957         fr_time = fi->interval.numerator * 10000 / fi->interval.denominator;
 958 
 959         for (i = 0; i < ARRAY_SIZE(s5k6aa_intervals); i++) {
 960                 const struct s5k6aa_interval *iv = &s5k6aa_intervals[i];
 961 
 962                 if (mbus_fmt->width > iv->size.width ||
 963                     mbus_fmt->height > iv->size.height)
 964                         continue;
 965 
 966                 err = abs(iv->reg_fr_time - fr_time);
 967                 if (err < min_err) {
 968                         fiv = iv;
 969                         min_err = err;
 970                 }
 971         }
 972         s5k6aa->fiv = fiv;
 973 
 974         v4l2_dbg(1, debug, &s5k6aa->sd, "Changed frame interval to %d us\n",
 975                  fiv->reg_fr_time * 100);
 976         return 0;
 977 }
 978 
 979 static int s5k6aa_s_frame_interval(struct v4l2_subdev *sd,
 980                                    struct v4l2_subdev_frame_interval *fi)
 981 {
 982         struct s5k6aa *s5k6aa = to_s5k6aa(sd);
 983         int ret;
 984 
 985         v4l2_dbg(1, debug, sd, "Setting %d/%d frame interval\n",
 986                  fi->interval.numerator, fi->interval.denominator);
 987 
 988         mutex_lock(&s5k6aa->lock);
 989         ret = __s5k6aa_set_frame_interval(s5k6aa, fi);
 990         s5k6aa->apply_cfg = 1;
 991 
 992         mutex_unlock(&s5k6aa->lock);
 993         return ret;
 994 }
 995 
 996 /*
 997  * V4L2 subdev pad level and video operations
 998  */
 999 static int s5k6aa_enum_frame_interval(struct v4l2_subdev *sd,
1000                               struct v4l2_subdev_pad_config *cfg,
1001                               struct v4l2_subdev_frame_interval_enum *fie)
1002 {
1003         struct s5k6aa *s5k6aa = to_s5k6aa(sd);
1004         const struct s5k6aa_interval *fi;
1005         int ret = 0;
1006 
1007         if (fie->index >= ARRAY_SIZE(s5k6aa_intervals))
1008                 return -EINVAL;
1009 
1010         v4l_bound_align_image(&fie->width, S5K6AA_WIN_WIDTH_MIN,
1011                               S5K6AA_WIN_WIDTH_MAX, 1,
1012                               &fie->height, S5K6AA_WIN_HEIGHT_MIN,
1013                               S5K6AA_WIN_HEIGHT_MAX, 1, 0);
1014 
1015         mutex_lock(&s5k6aa->lock);
1016         fi = &s5k6aa_intervals[fie->index];
1017         if (fie->width > fi->size.width || fie->height > fi->size.height)
1018                 ret = -EINVAL;
1019         else
1020                 fie->interval = fi->interval;
1021         mutex_unlock(&s5k6aa->lock);
1022 
1023         return ret;
1024 }
1025 
1026 static int s5k6aa_enum_mbus_code(struct v4l2_subdev *sd,
1027                                  struct v4l2_subdev_pad_config *cfg,
1028                                  struct v4l2_subdev_mbus_code_enum *code)
1029 {
1030         if (code->index >= ARRAY_SIZE(s5k6aa_formats))
1031                 return -EINVAL;
1032 
1033         code->code = s5k6aa_formats[code->index].code;
1034         return 0;
1035 }
1036 
1037 static int s5k6aa_enum_frame_size(struct v4l2_subdev *sd,
1038                                   struct v4l2_subdev_pad_config *cfg,
1039                                   struct v4l2_subdev_frame_size_enum *fse)
1040 {
1041         int i = ARRAY_SIZE(s5k6aa_formats);
1042 
1043         if (fse->index > 0)
1044                 return -EINVAL;
1045 
1046         while (--i)
1047                 if (fse->code == s5k6aa_formats[i].code)
1048                         break;
1049 
1050         fse->code = s5k6aa_formats[i].code;
1051         fse->min_width  = S5K6AA_WIN_WIDTH_MIN;
1052         fse->max_width  = S5K6AA_WIN_WIDTH_MAX;
1053         fse->max_height = S5K6AA_WIN_HEIGHT_MIN;
1054         fse->min_height = S5K6AA_WIN_HEIGHT_MAX;
1055 
1056         return 0;
1057 }
1058 
1059 static struct v4l2_rect *
1060 __s5k6aa_get_crop_rect(struct s5k6aa *s5k6aa, struct v4l2_subdev_pad_config *cfg,
1061                        enum v4l2_subdev_format_whence which)
1062 {
1063         if (which == V4L2_SUBDEV_FORMAT_ACTIVE)
1064                 return &s5k6aa->ccd_rect;
1065 
1066         WARN_ON(which != V4L2_SUBDEV_FORMAT_TRY);
1067         return v4l2_subdev_get_try_crop(&s5k6aa->sd, cfg, 0);
1068 }
1069 
1070 static void s5k6aa_try_format(struct s5k6aa *s5k6aa,
1071                               struct v4l2_mbus_framefmt *mf)
1072 {
1073         unsigned int index;
1074 
1075         v4l_bound_align_image(&mf->width, S5K6AA_WIN_WIDTH_MIN,
1076                               S5K6AA_WIN_WIDTH_MAX, 1,
1077                               &mf->height, S5K6AA_WIN_HEIGHT_MIN,
1078                               S5K6AA_WIN_HEIGHT_MAX, 1, 0);
1079 
1080         if (mf->colorspace != V4L2_COLORSPACE_JPEG &&
1081             mf->colorspace != V4L2_COLORSPACE_REC709)
1082                 mf->colorspace = V4L2_COLORSPACE_JPEG;
1083 
1084         index = s5k6aa_get_pixfmt_index(s5k6aa, mf);
1085 
1086         mf->colorspace  = s5k6aa_formats[index].colorspace;
1087         mf->code        = s5k6aa_formats[index].code;
1088         mf->field       = V4L2_FIELD_NONE;
1089 }
1090 
1091 static int s5k6aa_get_fmt(struct v4l2_subdev *sd, struct v4l2_subdev_pad_config *cfg,
1092                           struct v4l2_subdev_format *fmt)
1093 {
1094         struct s5k6aa *s5k6aa = to_s5k6aa(sd);
1095         struct v4l2_mbus_framefmt *mf;
1096 
1097         memset(fmt->reserved, 0, sizeof(fmt->reserved));
1098 
1099         if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) {
1100                 mf = v4l2_subdev_get_try_format(sd, cfg, 0);
1101                 fmt->format = *mf;
1102                 return 0;
1103         }
1104 
1105         mutex_lock(&s5k6aa->lock);
1106         fmt->format = s5k6aa->preset->mbus_fmt;
1107         mutex_unlock(&s5k6aa->lock);
1108 
1109         return 0;
1110 }
1111 
1112 static int s5k6aa_set_fmt(struct v4l2_subdev *sd, struct v4l2_subdev_pad_config *cfg,
1113                           struct v4l2_subdev_format *fmt)
1114 {
1115         struct s5k6aa *s5k6aa = to_s5k6aa(sd);
1116         struct s5k6aa_preset *preset = s5k6aa->preset;
1117         struct v4l2_mbus_framefmt *mf;
1118         struct v4l2_rect *crop;
1119         int ret = 0;
1120 
1121         mutex_lock(&s5k6aa->lock);
1122         s5k6aa_try_format(s5k6aa, &fmt->format);
1123 
1124         if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) {
1125                 mf = v4l2_subdev_get_try_format(sd, cfg, fmt->pad);
1126                 crop = v4l2_subdev_get_try_crop(sd, cfg, 0);
1127         } else {
1128                 if (s5k6aa->streaming) {
1129                         ret = -EBUSY;
1130                 } else {
1131                         mf = &preset->mbus_fmt;
1132                         crop = &s5k6aa->ccd_rect;
1133                         s5k6aa->apply_cfg = 1;
1134                 }
1135         }
1136 
1137         if (ret == 0) {
1138                 struct v4l2_subdev_frame_interval fiv = {
1139                         .interval = {0, 1}
1140                 };
1141 
1142                 *mf = fmt->format;
1143                 /*
1144                  * Make sure the crop window is valid, i.e. its size is
1145                  * greater than the output window, as the ISP supports
1146                  * only down-scaling.
1147                  */
1148                 crop->width = clamp_t(unsigned int, crop->width, mf->width,
1149                                       S5K6AA_WIN_WIDTH_MAX);
1150                 crop->height = clamp_t(unsigned int, crop->height, mf->height,
1151                                        S5K6AA_WIN_HEIGHT_MAX);
1152                 crop->left = clamp_t(unsigned int, crop->left, 0,
1153                                      S5K6AA_WIN_WIDTH_MAX - crop->width);
1154                 crop->top  = clamp_t(unsigned int, crop->top, 0,
1155                                      S5K6AA_WIN_HEIGHT_MAX - crop->height);
1156 
1157                 /* Reset to minimum possible frame interval */
1158                 ret = __s5k6aa_set_frame_interval(s5k6aa, &fiv);
1159         }
1160         mutex_unlock(&s5k6aa->lock);
1161 
1162         return ret;
1163 }
1164 
1165 static int s5k6aa_get_selection(struct v4l2_subdev *sd,
1166                                 struct v4l2_subdev_pad_config *cfg,
1167                                 struct v4l2_subdev_selection *sel)
1168 {
1169         struct s5k6aa *s5k6aa = to_s5k6aa(sd);
1170         struct v4l2_rect *rect;
1171 
1172         if (sel->target != V4L2_SEL_TGT_CROP)
1173                 return -EINVAL;
1174 
1175         memset(sel->reserved, 0, sizeof(sel->reserved));
1176 
1177         mutex_lock(&s5k6aa->lock);
1178         rect = __s5k6aa_get_crop_rect(s5k6aa, cfg, sel->which);
1179         sel->r = *rect;
1180         mutex_unlock(&s5k6aa->lock);
1181 
1182         v4l2_dbg(1, debug, sd, "Current crop rectangle: (%d,%d)/%dx%d\n",
1183                  rect->left, rect->top, rect->width, rect->height);
1184 
1185         return 0;
1186 }
1187 
1188 static int s5k6aa_set_selection(struct v4l2_subdev *sd,
1189                                 struct v4l2_subdev_pad_config *cfg,
1190                                 struct v4l2_subdev_selection *sel)
1191 {
1192         struct s5k6aa *s5k6aa = to_s5k6aa(sd);
1193         struct v4l2_mbus_framefmt *mf;
1194         unsigned int max_x, max_y;
1195         struct v4l2_rect *crop_r;
1196 
1197         if (sel->target != V4L2_SEL_TGT_CROP)
1198                 return -EINVAL;
1199 
1200         mutex_lock(&s5k6aa->lock);
1201         crop_r = __s5k6aa_get_crop_rect(s5k6aa, cfg, sel->which);
1202 
1203         if (sel->which == V4L2_SUBDEV_FORMAT_ACTIVE) {
1204                 mf = &s5k6aa->preset->mbus_fmt;
1205                 s5k6aa->apply_crop = 1;
1206         } else {
1207                 mf = v4l2_subdev_get_try_format(sd, cfg, 0);
1208         }
1209         v4l_bound_align_image(&sel->r.width, mf->width,
1210                               S5K6AA_WIN_WIDTH_MAX, 1,
1211                               &sel->r.height, mf->height,
1212                               S5K6AA_WIN_HEIGHT_MAX, 1, 0);
1213 
1214         max_x = (S5K6AA_WIN_WIDTH_MAX - sel->r.width) & ~1;
1215         max_y = (S5K6AA_WIN_HEIGHT_MAX - sel->r.height) & ~1;
1216 
1217         sel->r.left = clamp_t(unsigned int, sel->r.left, 0, max_x);
1218         sel->r.top  = clamp_t(unsigned int, sel->r.top, 0, max_y);
1219 
1220         *crop_r = sel->r;
1221 
1222         mutex_unlock(&s5k6aa->lock);
1223 
1224         v4l2_dbg(1, debug, sd, "Set crop rectangle: (%d,%d)/%dx%d\n",
1225                  crop_r->left, crop_r->top, crop_r->width, crop_r->height);
1226 
1227         return 0;
1228 }
1229 
1230 static const struct v4l2_subdev_pad_ops s5k6aa_pad_ops = {
1231         .enum_mbus_code         = s5k6aa_enum_mbus_code,
1232         .enum_frame_size        = s5k6aa_enum_frame_size,
1233         .enum_frame_interval    = s5k6aa_enum_frame_interval,
1234         .get_fmt                = s5k6aa_get_fmt,
1235         .set_fmt                = s5k6aa_set_fmt,
1236         .get_selection          = s5k6aa_get_selection,
1237         .set_selection          = s5k6aa_set_selection,
1238 };
1239 
1240 static const struct v4l2_subdev_video_ops s5k6aa_video_ops = {
1241         .g_frame_interval       = s5k6aa_g_frame_interval,
1242         .s_frame_interval       = s5k6aa_s_frame_interval,
1243         .s_stream               = s5k6aa_s_stream,
1244 };
1245 
1246 /*
1247  * V4L2 subdev controls
1248  */
1249 
1250 static int s5k6aa_s_ctrl(struct v4l2_ctrl *ctrl)
1251 {
1252         struct v4l2_subdev *sd = ctrl_to_sd(ctrl);
1253         struct i2c_client *client = v4l2_get_subdevdata(sd);
1254         struct s5k6aa *s5k6aa = to_s5k6aa(sd);
1255         int idx, err = 0;
1256 
1257         v4l2_dbg(1, debug, sd, "ctrl: 0x%x, value: %d\n", ctrl->id, ctrl->val);
1258 
1259         mutex_lock(&s5k6aa->lock);
1260         /*
1261          * If the device is not powered up by the host driver do
1262          * not apply any controls to H/W at this time. Instead
1263          * the controls will be restored right after power-up.
1264          */
1265         if (s5k6aa->power == 0)
1266                 goto unlock;
1267         idx = s5k6aa->preset->index;
1268 
1269         switch (ctrl->id) {
1270         case V4L2_CID_AUTO_WHITE_BALANCE:
1271                 err = s5k6aa_set_awb(s5k6aa, ctrl->val);
1272                 break;
1273 
1274         case V4L2_CID_BRIGHTNESS:
1275                 err = s5k6aa_write(client, REG_USER_BRIGHTNESS, ctrl->val);
1276                 break;
1277 
1278         case V4L2_CID_COLORFX:
1279                 err = s5k6aa_set_colorfx(s5k6aa, ctrl->val);
1280                 break;
1281 
1282         case V4L2_CID_CONTRAST:
1283                 err = s5k6aa_write(client, REG_USER_CONTRAST, ctrl->val);
1284                 break;
1285 
1286         case V4L2_CID_EXPOSURE_AUTO:
1287                 err = s5k6aa_set_auto_exposure(s5k6aa, ctrl->val);
1288                 break;
1289 
1290         case V4L2_CID_HFLIP:
1291                 err = s5k6aa_set_mirror(s5k6aa, ctrl->val);
1292                 if (err)
1293                         break;
1294                 err = s5k6aa_write(client, REG_G_PREV_CFG_CHG, 1);
1295                 break;
1296 
1297         case V4L2_CID_POWER_LINE_FREQUENCY:
1298                 err = s5k6aa_set_anti_flicker(s5k6aa, ctrl->val);
1299                 break;
1300 
1301         case V4L2_CID_SATURATION:
1302                 err = s5k6aa_write(client, REG_USER_SATURATION, ctrl->val);
1303                 break;
1304 
1305         case V4L2_CID_SHARPNESS:
1306                 err = s5k6aa_write(client, REG_USER_SHARPBLUR, ctrl->val);
1307                 break;
1308 
1309         case V4L2_CID_WHITE_BALANCE_TEMPERATURE:
1310                 err = s5k6aa_write(client, REG_P_COLORTEMP(idx), ctrl->val);
1311                 if (err)
1312                         break;
1313                 err = s5k6aa_write(client, REG_G_PREV_CFG_CHG, 1);
1314                 break;
1315         }
1316 unlock:
1317         mutex_unlock(&s5k6aa->lock);
1318         return err;
1319 }
1320 
1321 static const struct v4l2_ctrl_ops s5k6aa_ctrl_ops = {
1322         .s_ctrl = s5k6aa_s_ctrl,
1323 };
1324 
1325 static int s5k6aa_log_status(struct v4l2_subdev *sd)
1326 {
1327         v4l2_ctrl_handler_log_status(sd->ctrl_handler, sd->name);
1328         return 0;
1329 }
1330 
1331 #define V4L2_CID_RED_GAIN       (V4L2_CTRL_CLASS_CAMERA | 0x1001)
1332 #define V4L2_CID_GREEN_GAIN     (V4L2_CTRL_CLASS_CAMERA | 0x1002)
1333 #define V4L2_CID_BLUE_GAIN      (V4L2_CTRL_CLASS_CAMERA | 0x1003)
1334 
1335 static const struct v4l2_ctrl_config s5k6aa_ctrls[] = {
1336         {
1337                 .ops    = &s5k6aa_ctrl_ops,
1338                 .id     = V4L2_CID_RED_GAIN,
1339                 .type   = V4L2_CTRL_TYPE_INTEGER,
1340                 .name   = "Gain, Red",
1341                 .min    = 0,
1342                 .max    = 256,
1343                 .def    = 127,
1344                 .step   = 1,
1345         }, {
1346                 .ops    = &s5k6aa_ctrl_ops,
1347                 .id     = V4L2_CID_GREEN_GAIN,
1348                 .type   = V4L2_CTRL_TYPE_INTEGER,
1349                 .name   = "Gain, Green",
1350                 .min    = 0,
1351                 .max    = 256,
1352                 .def    = 127,
1353                 .step   = 1,
1354         }, {
1355                 .ops    = &s5k6aa_ctrl_ops,
1356                 .id     = V4L2_CID_BLUE_GAIN,
1357                 .type   = V4L2_CTRL_TYPE_INTEGER,
1358                 .name   = "Gain, Blue",
1359                 .min    = 0,
1360                 .max    = 256,
1361                 .def    = 127,
1362                 .step   = 1,
1363         },
1364 };
1365 
1366 static int s5k6aa_initialize_ctrls(struct s5k6aa *s5k6aa)
1367 {
1368         const struct v4l2_ctrl_ops *ops = &s5k6aa_ctrl_ops;
1369         struct s5k6aa_ctrls *ctrls = &s5k6aa->ctrls;
1370         struct v4l2_ctrl_handler *hdl = &ctrls->handler;
1371 
1372         int ret = v4l2_ctrl_handler_init(hdl, 16);
1373         if (ret)
1374                 return ret;
1375         /* Auto white balance cluster */
1376         ctrls->awb = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_AUTO_WHITE_BALANCE,
1377                                        0, 1, 1, 1);
1378         ctrls->gain_red = v4l2_ctrl_new_custom(hdl, &s5k6aa_ctrls[0], NULL);
1379         ctrls->gain_green = v4l2_ctrl_new_custom(hdl, &s5k6aa_ctrls[1], NULL);
1380         ctrls->gain_blue = v4l2_ctrl_new_custom(hdl, &s5k6aa_ctrls[2], NULL);
1381         v4l2_ctrl_auto_cluster(4, &ctrls->awb, 0, false);
1382 
1383         ctrls->hflip = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_HFLIP, 0, 1, 1, 0);
1384         ctrls->vflip = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_VFLIP, 0, 1, 1, 0);
1385         v4l2_ctrl_cluster(2, &ctrls->hflip);
1386 
1387         ctrls->auto_exp = v4l2_ctrl_new_std_menu(hdl, ops,
1388                                 V4L2_CID_EXPOSURE_AUTO,
1389                                 V4L2_EXPOSURE_MANUAL, 0, V4L2_EXPOSURE_AUTO);
1390         /* Exposure time: x 1 us */
1391         ctrls->exposure = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_EXPOSURE,
1392                                             0, 6000000U, 1, 100000U);
1393         /* Total gain: 256 <=> 1x */
1394         ctrls->gain = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_GAIN,
1395                                         0, 256, 1, 256);
1396         v4l2_ctrl_auto_cluster(3, &ctrls->auto_exp, 0, false);
1397 
1398         v4l2_ctrl_new_std_menu(hdl, ops, V4L2_CID_POWER_LINE_FREQUENCY,
1399                                V4L2_CID_POWER_LINE_FREQUENCY_AUTO, 0,
1400                                V4L2_CID_POWER_LINE_FREQUENCY_AUTO);
1401 
1402         v4l2_ctrl_new_std_menu(hdl, ops, V4L2_CID_COLORFX,
1403                                V4L2_COLORFX_SKY_BLUE, ~0x6f, V4L2_COLORFX_NONE);
1404 
1405         v4l2_ctrl_new_std(hdl, ops, V4L2_CID_WHITE_BALANCE_TEMPERATURE,
1406                           0, 256, 1, 0);
1407 
1408         v4l2_ctrl_new_std(hdl, ops, V4L2_CID_SATURATION, -127, 127, 1, 0);
1409         v4l2_ctrl_new_std(hdl, ops, V4L2_CID_BRIGHTNESS, -127, 127, 1, 0);
1410         v4l2_ctrl_new_std(hdl, ops, V4L2_CID_CONTRAST, -127, 127, 1, 0);
1411         v4l2_ctrl_new_std(hdl, ops, V4L2_CID_SHARPNESS, -127, 127, 1, 0);
1412 
1413         if (hdl->error) {
1414                 ret = hdl->error;
1415                 v4l2_ctrl_handler_free(hdl);
1416                 return ret;
1417         }
1418 
1419         s5k6aa->sd.ctrl_handler = hdl;
1420         return 0;
1421 }
1422 
1423 /*
1424  * V4L2 subdev internal operations
1425  */
1426 static int s5k6aa_open(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)
1427 {
1428         struct v4l2_mbus_framefmt *format = v4l2_subdev_get_try_format(sd, fh->pad, 0);
1429         struct v4l2_rect *crop = v4l2_subdev_get_try_crop(sd, fh->pad, 0);
1430 
1431         format->colorspace = s5k6aa_formats[0].colorspace;
1432         format->code = s5k6aa_formats[0].code;
1433         format->width = S5K6AA_OUT_WIDTH_DEF;
1434         format->height = S5K6AA_OUT_HEIGHT_DEF;
1435         format->field = V4L2_FIELD_NONE;
1436 
1437         crop->width = S5K6AA_WIN_WIDTH_MAX;
1438         crop->height = S5K6AA_WIN_HEIGHT_MAX;
1439         crop->left = 0;
1440         crop->top = 0;
1441 
1442         return 0;
1443 }
1444 
1445 static int s5k6aa_check_fw_revision(struct s5k6aa *s5k6aa)
1446 {
1447         struct i2c_client *client = v4l2_get_subdevdata(&s5k6aa->sd);
1448         u16 api_ver = 0, fw_rev = 0;
1449 
1450         int ret = s5k6aa_set_ahb_address(client);
1451 
1452         if (!ret)
1453                 ret = s5k6aa_read(client, REG_FW_APIVER, &api_ver);
1454         if (!ret)
1455                 ret = s5k6aa_read(client, REG_FW_REVISION, &fw_rev);
1456         if (ret) {
1457                 v4l2_err(&s5k6aa->sd, "FW revision check failed!\n");
1458                 return ret;
1459         }
1460 
1461         v4l2_info(&s5k6aa->sd, "FW API ver.: 0x%X, FW rev.: 0x%X\n",
1462                   api_ver, fw_rev);
1463 
1464         return api_ver == S5K6AAFX_FW_APIVER ? 0 : -ENODEV;
1465 }
1466 
1467 static int s5k6aa_registered(struct v4l2_subdev *sd)
1468 {
1469         struct s5k6aa *s5k6aa = to_s5k6aa(sd);
1470         int ret;
1471 
1472         mutex_lock(&s5k6aa->lock);
1473         ret = __s5k6aa_power_on(s5k6aa);
1474         if (!ret) {
1475                 msleep(100);
1476                 ret = s5k6aa_check_fw_revision(s5k6aa);
1477                 __s5k6aa_power_off(s5k6aa);
1478         }
1479         mutex_unlock(&s5k6aa->lock);
1480 
1481         return ret;
1482 }
1483 
1484 static const struct v4l2_subdev_internal_ops s5k6aa_subdev_internal_ops = {
1485         .registered = s5k6aa_registered,
1486         .open = s5k6aa_open,
1487 };
1488 
1489 static const struct v4l2_subdev_core_ops s5k6aa_core_ops = {
1490         .s_power = s5k6aa_set_power,
1491         .log_status = s5k6aa_log_status,
1492 };
1493 
1494 static const struct v4l2_subdev_ops s5k6aa_subdev_ops = {
1495         .core = &s5k6aa_core_ops,
1496         .pad = &s5k6aa_pad_ops,
1497         .video = &s5k6aa_video_ops,
1498 };
1499 
1500 /*
1501  * GPIO setup
1502  */
1503 
1504 static int s5k6aa_configure_gpios(struct s5k6aa *s5k6aa,
1505                                   const struct s5k6aa_platform_data *pdata)
1506 {
1507         struct i2c_client *client = v4l2_get_subdevdata(&s5k6aa->sd);
1508         const struct s5k6aa_gpio *gpio;
1509         unsigned long flags;
1510         int ret;
1511 
1512         s5k6aa->gpio[STBY].gpio = -EINVAL;
1513         s5k6aa->gpio[RST].gpio  = -EINVAL;
1514 
1515         gpio = &pdata->gpio_stby;
1516         if (gpio_is_valid(gpio->gpio)) {
1517                 flags = (gpio->level ? GPIOF_OUT_INIT_HIGH : GPIOF_OUT_INIT_LOW)
1518                       | GPIOF_EXPORT;
1519                 ret = devm_gpio_request_one(&client->dev, gpio->gpio, flags,
1520                                             "S5K6AA_STBY");
1521                 if (ret < 0)
1522                         return ret;
1523 
1524                 s5k6aa->gpio[STBY] = *gpio;
1525         }
1526 
1527         gpio = &pdata->gpio_reset;
1528         if (gpio_is_valid(gpio->gpio)) {
1529                 flags = (gpio->level ? GPIOF_OUT_INIT_HIGH : GPIOF_OUT_INIT_LOW)
1530                       | GPIOF_EXPORT;
1531                 ret = devm_gpio_request_one(&client->dev, gpio->gpio, flags,
1532                                             "S5K6AA_RST");
1533                 if (ret < 0)
1534                         return ret;
1535 
1536                 s5k6aa->gpio[RST] = *gpio;
1537         }
1538 
1539         return 0;
1540 }
1541 
1542 static int s5k6aa_probe(struct i2c_client *client,
1543                         const struct i2c_device_id *id)
1544 {
1545         const struct s5k6aa_platform_data *pdata = client->dev.platform_data;
1546         struct v4l2_subdev *sd;
1547         struct s5k6aa *s5k6aa;
1548         int i, ret;
1549 
1550         if (pdata == NULL) {
1551                 dev_err(&client->dev, "Platform data not specified\n");
1552                 return -EINVAL;
1553         }
1554 
1555         if (pdata->mclk_frequency == 0) {
1556                 dev_err(&client->dev, "MCLK frequency not specified\n");
1557                 return -EINVAL;
1558         }
1559 
1560         s5k6aa = devm_kzalloc(&client->dev, sizeof(*s5k6aa), GFP_KERNEL);
1561         if (!s5k6aa)
1562                 return -ENOMEM;
1563 
1564         mutex_init(&s5k6aa->lock);
1565 
1566         s5k6aa->mclk_frequency = pdata->mclk_frequency;
1567         s5k6aa->bus_type = pdata->bus_type;
1568         s5k6aa->mipi_lanes = pdata->nlanes;
1569         s5k6aa->s_power = pdata->set_power;
1570         s5k6aa->inv_hflip = pdata->horiz_flip;
1571         s5k6aa->inv_vflip = pdata->vert_flip;
1572 
1573         sd = &s5k6aa->sd;
1574         v4l2_i2c_subdev_init(sd, client, &s5k6aa_subdev_ops);
1575         /* Static name; NEVER use in new drivers! */
1576         strscpy(sd->name, DRIVER_NAME, sizeof(sd->name));
1577 
1578         sd->internal_ops = &s5k6aa_subdev_internal_ops;
1579         sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
1580 
1581         s5k6aa->pad.flags = MEDIA_PAD_FL_SOURCE;
1582         sd->entity.function = MEDIA_ENT_F_CAM_SENSOR;
1583         ret = media_entity_pads_init(&sd->entity, 1, &s5k6aa->pad);
1584         if (ret)
1585                 return ret;
1586 
1587         ret = s5k6aa_configure_gpios(s5k6aa, pdata);
1588         if (ret)
1589                 goto out_err;
1590 
1591         for (i = 0; i < S5K6AA_NUM_SUPPLIES; i++)
1592                 s5k6aa->supplies[i].supply = s5k6aa_supply_names[i];
1593 
1594         ret = devm_regulator_bulk_get(&client->dev, S5K6AA_NUM_SUPPLIES,
1595                                  s5k6aa->supplies);
1596         if (ret) {
1597                 dev_err(&client->dev, "Failed to get regulators\n");
1598                 goto out_err;
1599         }
1600 
1601         ret = s5k6aa_initialize_ctrls(s5k6aa);
1602         if (ret)
1603                 goto out_err;
1604 
1605         s5k6aa_presets_data_init(s5k6aa);
1606 
1607         s5k6aa->ccd_rect.width = S5K6AA_WIN_WIDTH_MAX;
1608         s5k6aa->ccd_rect.height = S5K6AA_WIN_HEIGHT_MAX;
1609         s5k6aa->ccd_rect.left = 0;
1610         s5k6aa->ccd_rect.top = 0;
1611 
1612         return 0;
1613 
1614 out_err:
1615         media_entity_cleanup(&s5k6aa->sd.entity);
1616         return ret;
1617 }
1618 
1619 static int s5k6aa_remove(struct i2c_client *client)
1620 {
1621         struct v4l2_subdev *sd = i2c_get_clientdata(client);
1622 
1623         v4l2_device_unregister_subdev(sd);
1624         v4l2_ctrl_handler_free(sd->ctrl_handler);
1625         media_entity_cleanup(&sd->entity);
1626 
1627         return 0;
1628 }
1629 
1630 static const struct i2c_device_id s5k6aa_id[] = {
1631         { DRIVER_NAME, 0 },
1632         { },
1633 };
1634 MODULE_DEVICE_TABLE(i2c, s5k6aa_id);
1635 
1636 
1637 static struct i2c_driver s5k6aa_i2c_driver = {
1638         .driver = {
1639                 .name = DRIVER_NAME
1640         },
1641         .probe          = s5k6aa_probe,
1642         .remove         = s5k6aa_remove,
1643         .id_table       = s5k6aa_id,
1644 };
1645 
1646 module_i2c_driver(s5k6aa_i2c_driver);
1647 
1648 MODULE_DESCRIPTION("Samsung S5K6AA(FX) SXGA camera driver");
1649 MODULE_AUTHOR("Sylwester Nawrocki <s.nawrocki@samsung.com>");
1650 MODULE_LICENSE("GPL");
/* [<][>][^][v][top][bottom][index][help] */
root/drivers/media/i2c/s5k6aa.c

DEFINITIONS
