// SPDX-License-Identifier: GPL-2.0-only
/*
 * Driver for Samsung S5K5BAF UXGA 1/5" 2M CMOS Image Sensor
 * with embedded SoC ISP.
 *
 * Copyright (C) 2013, Samsung Electronics Co., Ltd.
 * Andrzej Hajda <a.hajda@samsung.com>
 *
 * Based on S5K6AA driver authored by Sylwester Nawrocki
 * Copyright (C) 2013, Samsung Electronics Co., Ltd.
 */

#include <linux/clk.h>
#include <linux/delay.h>
#include <linux/firmware.h>
#include <linux/gpio.h>
#include <linux/i2c.h>
#include <linux/media.h>
#include <linux/module.h>
#include <linux/of_gpio.h>
#include <linux/of_graph.h>
#include <linux/regulator/consumer.h>
#include <linux/slab.h>

#include <media/media-entity.h>
#include <media/v4l2-ctrls.h>
#include <media/v4l2-device.h>
#include <media/v4l2-subdev.h>
#include <media/v4l2-mediabus.h>
#include <media/v4l2-fwnode.h>

static int debug;
module_param(debug, int, 0644);

#define S5K5BAF_DRIVER_NAME             "s5k5baf"
#define S5K5BAF_DEFAULT_MCLK_FREQ       24000000U
#define S5K5BAF_CLK_NAME                "mclk"

#define S5K5BAF_FW_FILENAME             "s5k5baf-cfg.bin"
#define S5K5BAF_FW_TAG                  "SF00"
#define S5K5BAG_FW_TAG_LEN              2
#define S5K5BAG_FW_MAX_COUNT            16

#define S5K5BAF_CIS_WIDTH               1600
#define S5K5BAF_CIS_HEIGHT              1200
#define S5K5BAF_WIN_WIDTH_MIN           8
#define S5K5BAF_WIN_HEIGHT_MIN          8
#define S5K5BAF_GAIN_RED_DEF            127
#define S5K5BAF_GAIN_GREEN_DEF          95
#define S5K5BAF_GAIN_BLUE_DEF           180
/* Default number of MIPI CSI-2 data lanes used */
#define S5K5BAF_DEF_NUM_LANES           1

#define AHB_MSB_ADDR_PTR                0xfcfc

/*
 * Register interface pages (the most significant word of the address)
 */
#define PAGE_IF_HW                      0xd000
#define PAGE_IF_SW                      0x7000

/*
 * H/W register Interface (PAGE_IF_HW)
 */
#define REG_SW_LOAD_COMPLETE            0x0014
#define REG_CMDWR_PAGE                  0x0028
#define REG_CMDWR_ADDR                  0x002a
#define REG_CMDRD_PAGE                  0x002c
#define REG_CMDRD_ADDR                  0x002e
#define REG_CMD_BUF                     0x0f12
#define REG_SET_HOST_INT                0x1000
#define REG_CLEAR_HOST_INT              0x1030
#define REG_PATTERN_SET                 0x3100
#define REG_PATTERN_WIDTH               0x3118
#define REG_PATTERN_HEIGHT              0x311a
#define REG_PATTERN_PARAM               0x311c

/*
 * S/W register interface (PAGE_IF_SW)
 */

/* Firmware revision information */
#define REG_FW_APIVER                   0x012e
#define  S5K5BAF_FW_APIVER              0x0001
#define REG_FW_REVISION                 0x0130
#define REG_FW_SENSOR_ID                0x0152

/* Initialization parameters */
/* Master clock frequency in KHz */
#define REG_I_INCLK_FREQ_L              0x01b8
#define REG_I_INCLK_FREQ_H              0x01ba
#define  MIN_MCLK_FREQ_KHZ              6000U
#define  MAX_MCLK_FREQ_KHZ              48000U
#define REG_I_USE_NPVI_CLOCKS           0x01c6
#define  NPVI_CLOCKS                    1
#define REG_I_USE_NMIPI_CLOCKS          0x01c8
#define  NMIPI_CLOCKS                   1
#define REG_I_BLOCK_INTERNAL_PLL_CALC   0x01ca

/* Clock configurations, n = 0..2. REG_I_* frequency unit is 4 kHz. */
#define REG_I_OPCLK_4KHZ(n)             ((n) * 6 + 0x01cc)
#define REG_I_MIN_OUTRATE_4KHZ(n)       ((n) * 6 + 0x01ce)
#define REG_I_MAX_OUTRATE_4KHZ(n)       ((n) * 6 + 0x01d0)
#define  SCLK_PVI_FREQ                  24000
#define  SCLK_MIPI_FREQ                 48000
#define  PCLK_MIN_FREQ                  6000
#define  PCLK_MAX_FREQ                  48000
#define REG_I_USE_REGS_API              0x01de
#define REG_I_INIT_PARAMS_UPDATED       0x01e0
#define REG_I_ERROR_INFO                0x01e2

/* General purpose parameters */
#define REG_USER_BRIGHTNESS             0x01e4
#define REG_USER_CONTRAST               0x01e6
#define REG_USER_SATURATION             0x01e8
#define REG_USER_SHARPBLUR              0x01ea

#define REG_G_SPEC_EFFECTS              0x01ee
#define REG_G_ENABLE_PREV               0x01f0
#define REG_G_ENABLE_PREV_CHG           0x01f2
#define REG_G_NEW_CFG_SYNC              0x01f8
#define REG_G_PREVREQ_IN_WIDTH          0x01fa
#define REG_G_PREVREQ_IN_HEIGHT         0x01fc
#define REG_G_PREVREQ_IN_XOFFS          0x01fe
#define REG_G_PREVREQ_IN_YOFFS          0x0200
#define REG_G_PREVZOOM_IN_WIDTH         0x020a
#define REG_G_PREVZOOM_IN_HEIGHT        0x020c
#define REG_G_PREVZOOM_IN_XOFFS         0x020e
#define REG_G_PREVZOOM_IN_YOFFS         0x0210
#define REG_G_INPUTS_CHANGE_REQ         0x021a
#define REG_G_ACTIVE_PREV_CFG           0x021c
#define REG_G_PREV_CFG_CHG              0x021e
#define REG_G_PREV_OPEN_AFTER_CH        0x0220
#define REG_G_PREV_CFG_ERROR            0x0222
#define  CFG_ERROR_RANGE                0x0b
#define REG_G_PREV_CFG_BYPASS_CHANGED   0x022a
#define REG_G_ACTUAL_P_FR_TIME          0x023a
#define REG_G_ACTUAL_P_OUT_RATE         0x023c
#define REG_G_ACTUAL_C_FR_TIME          0x023e
#define REG_G_ACTUAL_C_OUT_RATE         0x0240

/* Preview control section. n = 0...4. */
#define PREG(n, x)                      ((n) * 0x26 + x)
#define REG_P_OUT_WIDTH(n)              PREG(n, 0x0242)
#define REG_P_OUT_HEIGHT(n)             PREG(n, 0x0244)
#define REG_P_FMT(n)                    PREG(n, 0x0246)
#define REG_P_MAX_OUT_RATE(n)           PREG(n, 0x0248)
#define REG_P_MIN_OUT_RATE(n)           PREG(n, 0x024a)
#define REG_P_PVI_MASK(n)               PREG(n, 0x024c)
#define  PVI_MASK_MIPI                  0x52
#define REG_P_CLK_INDEX(n)              PREG(n, 0x024e)
#define  CLK_PVI_INDEX                  0
#define  CLK_MIPI_INDEX                 NPVI_CLOCKS
#define REG_P_FR_RATE_TYPE(n)           PREG(n, 0x0250)
#define  FR_RATE_DYNAMIC                0
#define  FR_RATE_FIXED                  1
#define  FR_RATE_FIXED_ACCURATE         2
#define REG_P_FR_RATE_Q_TYPE(n)         PREG(n, 0x0252)
#define  FR_RATE_Q_DYNAMIC              0
#define  FR_RATE_Q_BEST_FRRATE          1 /* Binning enabled */
#define  FR_RATE_Q_BEST_QUALITY         2 /* Binning disabled */
/* Frame period in 0.1 ms units */
#define REG_P_MAX_FR_TIME(n)            PREG(n, 0x0254)
#define REG_P_MIN_FR_TIME(n)            PREG(n, 0x0256)
#define  S5K5BAF_MIN_FR_TIME            333  /* x100 us */
#define  S5K5BAF_MAX_FR_TIME            6500 /* x100 us */
/* The below 5 registers are for "device correction" values */
#define REG_P_SATURATION(n)             PREG(n, 0x0258)
#define REG_P_SHARP_BLUR(n)             PREG(n, 0x025a)
#define REG_P_GLAMOUR(n)                PREG(n, 0x025c)
#define REG_P_COLORTEMP(n)              PREG(n, 0x025e)
#define REG_P_GAMMA_INDEX(n)            PREG(n, 0x0260)
#define REG_P_PREV_MIRROR(n)            PREG(n, 0x0262)
#define REG_P_CAP_MIRROR(n)             PREG(n, 0x0264)
#define REG_P_CAP_ROTATION(n)           PREG(n, 0x0266)

/* Extended image property controls */
/* Exposure time in 10 us units */
#define REG_SF_USR_EXPOSURE_L           0x03bc
#define REG_SF_USR_EXPOSURE_H           0x03be
#define REG_SF_USR_EXPOSURE_CHG         0x03c0
#define REG_SF_USR_TOT_GAIN             0x03c2
#define REG_SF_USR_TOT_GAIN_CHG         0x03c4
#define REG_SF_RGAIN                    0x03c6
#define REG_SF_RGAIN_CHG                0x03c8
#define REG_SF_GGAIN                    0x03ca
#define REG_SF_GGAIN_CHG                0x03cc
#define REG_SF_BGAIN                    0x03ce
#define REG_SF_BGAIN_CHG                0x03d0
#define REG_SF_WBGAIN_CHG               0x03d2
#define REG_SF_FLICKER_QUANT            0x03d4
#define REG_SF_FLICKER_QUANT_CHG        0x03d6

/* Output interface (parallel/MIPI) setup */
#define REG_OIF_EN_MIPI_LANES           0x03f2
#define REG_OIF_EN_PACKETS              0x03f4
#define  EN_PACKETS_CSI2                0xc3
#define REG_OIF_CFG_CHG                 0x03f6

/* Auto-algorithms enable mask */
#define REG_DBG_AUTOALG_EN              0x03f8
#define  AALG_ALL_EN                    BIT(0)
#define  AALG_AE_EN                     BIT(1)
#define  AALG_DIVLEI_EN                 BIT(2)
#define  AALG_WB_EN                     BIT(3)
#define  AALG_USE_WB_FOR_ISP            BIT(4)
#define  AALG_FLICKER_EN                BIT(5)
#define  AALG_FIT_EN                    BIT(6)
#define  AALG_WRHW_EN                   BIT(7)

/* Pointers to color correction matrices */
#define REG_PTR_CCM_HORIZON             0x06d0
#define REG_PTR_CCM_INCANDESCENT        0x06d4
#define REG_PTR_CCM_WARM_WHITE          0x06d8
#define REG_PTR_CCM_COOL_WHITE          0x06dc
#define REG_PTR_CCM_DL50                0x06e0
#define REG_PTR_CCM_DL65                0x06e4
#define REG_PTR_CCM_OUTDOOR             0x06ec

#define REG_ARR_CCM(n)                  (0x2800 + 36 * (n))

static const char * const s5k5baf_supply_names[] = {
        "vdda",         /* Analog power supply 2.8V (2.6V to 3.0V) */
        "vddreg",       /* Regulator input power supply 1.8V (1.7V to 1.9V)
                           or 2.8V (2.6V to 3.0) */
        "vddio",        /* I/O power supply 1.8V (1.65V to 1.95V)
                           or 2.8V (2.5V to 3.1V) */
};
#define S5K5BAF_NUM_SUPPLIES ARRAY_SIZE(s5k5baf_supply_names)

struct s5k5baf_gpio {
        int gpio;
        int level;
};

enum s5k5baf_gpio_id {
        STBY,
        RST,
        NUM_GPIOS,
};

#define PAD_CIS 0
#define PAD_OUT 1
#define NUM_CIS_PADS 1
#define NUM_ISP_PADS 2

struct s5k5baf_pixfmt {
        u32 code;
        u32 colorspace;
        /* REG_P_FMT(x) register value */
        u16 reg_p_fmt;
};

struct s5k5baf_ctrls {
        struct v4l2_ctrl_handler handler;
        struct { /* Auto / manual white balance cluster */
                struct v4l2_ctrl *awb;
                struct v4l2_ctrl *gain_red;
                struct v4l2_ctrl *gain_blue;
        };
        struct { /* Mirror cluster */
                struct v4l2_ctrl *hflip;
                struct v4l2_ctrl *vflip;
        };
        struct { /* Auto exposure / manual exposure and gain cluster */
                struct v4l2_ctrl *auto_exp;
                struct v4l2_ctrl *exposure;
                struct v4l2_ctrl *gain;
        };
};

enum {
        S5K5BAF_FW_ID_PATCH,
        S5K5BAF_FW_ID_CCM,
        S5K5BAF_FW_ID_CIS,
};

struct s5k5baf_fw {
        u16 count;
        struct {
                u16 id;
                u16 offset;
        } seq[0];
        u16 data[0];
};

struct s5k5baf {
        struct s5k5baf_gpio gpios[NUM_GPIOS];
        enum v4l2_mbus_type bus_type;
        u8 nlanes;
        struct regulator_bulk_data supplies[S5K5BAF_NUM_SUPPLIES];

        struct clk *clock;
        u32 mclk_frequency;

        struct s5k5baf_fw *fw;

        struct v4l2_subdev cis_sd;
        struct media_pad cis_pad;

        struct v4l2_subdev sd;
        struct media_pad pads[NUM_ISP_PADS];

        /* protects the struct members below */
        struct mutex lock;

        int error;

        struct v4l2_rect crop_sink;
        struct v4l2_rect compose;
        struct v4l2_rect crop_source;
        /* index to s5k5baf_formats array */
        int pixfmt;
        /* actual frame interval in 100us */
        u16 fiv;
        /* requested frame interval in 100us */
        u16 req_fiv;
        /* cache for REG_DBG_AUTOALG_EN register */
        u16 auto_alg;

        struct s5k5baf_ctrls ctrls;

        unsigned int streaming:1;
        unsigned int apply_cfg:1;
        unsigned int apply_crop:1;
        unsigned int valid_auto_alg:1;
        unsigned int power;
};

static const struct s5k5baf_pixfmt s5k5baf_formats[] = {
        { MEDIA_BUS_FMT_VYUY8_2X8,      V4L2_COLORSPACE_JPEG,   5 },
        /* range 16-240 */
        { MEDIA_BUS_FMT_VYUY8_2X8,      V4L2_COLORSPACE_REC709, 6 },
        { MEDIA_BUS_FMT_RGB565_2X8_BE,  V4L2_COLORSPACE_JPEG,   0 },
};

static struct v4l2_rect s5k5baf_cis_rect = {
        0, 0, S5K5BAF_CIS_WIDTH, S5K5BAF_CIS_HEIGHT
};

/* Setfile contains set of I2C command sequences. Each sequence has its ID.
 * setfile format:
 *      u8 magic[4];
 *      u16 count;              number of sequences
 *      struct {
 *              u16 id;         sequence id
 *              u16 offset;     sequence offset in data array
 *      } seq[count];
 *      u16 data[*];            array containing sequences
 *
 */
static int s5k5baf_fw_parse(struct device *dev, struct s5k5baf_fw **fw,
                            size_t count, const __le16 *data)
{
        struct s5k5baf_fw *f;
        u16 *d, i, *end;
        int ret;

        if (count < S5K5BAG_FW_TAG_LEN + 1) {
                dev_err(dev, "firmware file too short (%zu)\n", count);
                return -EINVAL;
        }

        ret = memcmp(data, S5K5BAF_FW_TAG, S5K5BAG_FW_TAG_LEN * sizeof(u16));
        if (ret != 0) {
                dev_err(dev, "invalid firmware magic number\n");
                return -EINVAL;
        }

        data += S5K5BAG_FW_TAG_LEN;
        count -= S5K5BAG_FW_TAG_LEN;

        d = devm_kcalloc(dev, count, sizeof(u16), GFP_KERNEL);
        if (!d)
                return -ENOMEM;

        for (i = 0; i < count; ++i)
                d[i] = le16_to_cpu(data[i]);

        f = (struct s5k5baf_fw *)d;
        if (count < 1 + 2 * f->count) {
                dev_err(dev, "invalid firmware header (count=%d size=%zu)\n",
                        f->count, 2 * (count + S5K5BAG_FW_TAG_LEN));
                return -EINVAL;
        }
        end = d + count;
        d += 1 + 2 * f->count;

        for (i = 0; i < f->count; ++i) {
                if (f->seq[i].offset + d <= end)
                        continue;
                dev_err(dev, "invalid firmware header (seq=%d)\n", i);
                return -EINVAL;
        }

        *fw = f;

        return 0;
}

static inline struct v4l2_subdev *ctrl_to_sd(struct v4l2_ctrl *ctrl)
{
        return &container_of(ctrl->handler, struct s5k5baf, ctrls.handler)->sd;
}

static inline bool s5k5baf_is_cis_subdev(struct v4l2_subdev *sd)
{
        return sd->entity.function == MEDIA_ENT_F_CAM_SENSOR;
}

static inline struct s5k5baf *to_s5k5baf(struct v4l2_subdev *sd)
{
        if (s5k5baf_is_cis_subdev(sd))
                return container_of(sd, struct s5k5baf, cis_sd);
        else
                return container_of(sd, struct s5k5baf, sd);
}

static u16 s5k5baf_i2c_read(struct s5k5baf *state, u16 addr)
{
        struct i2c_client *c = v4l2_get_subdevdata(&state->sd);
        __be16 w, r;
        u16 res;
        struct i2c_msg msg[] = {
                { .addr = c->addr, .flags = 0,
                  .len = 2, .buf = (u8 *)&w },
                { .addr = c->addr, .flags = I2C_M_RD,
                  .len = 2, .buf = (u8 *)&r },
        };
        int ret;

        if (state->error)
                return 0;

        w = cpu_to_be16(addr);
        ret = i2c_transfer(c->adapter, msg, 2);
        res = be16_to_cpu(r);

        v4l2_dbg(3, debug, c, "i2c_read: 0x%04x : 0x%04x\n", addr, res);

        if (ret != 2) {
                v4l2_err(c, "i2c_read: error during transfer (%d)\n", ret);
                state->error = ret;
        }
        return res;
}

static void s5k5baf_i2c_write(struct s5k5baf *state, u16 addr, u16 val)
{
        u8 buf[4] = { addr >> 8, addr & 0xFF, val >> 8, val & 0xFF };
        struct i2c_client *c = v4l2_get_subdevdata(&state->sd);
        int ret;

        if (state->error)
                return;

        ret = i2c_master_send(c, buf, 4);
        v4l2_dbg(3, debug, c, "i2c_write: 0x%04x : 0x%04x\n", addr, val);

        if (ret != 4) {
                v4l2_err(c, "i2c_write: error during transfer (%d)\n", ret);
                state->error = ret;
        }
}

static u16 s5k5baf_read(struct s5k5baf *state, u16 addr)
{
        s5k5baf_i2c_write(state, REG_CMDRD_ADDR, addr);
        return s5k5baf_i2c_read(state, REG_CMD_BUF);
}

static void s5k5baf_write(struct s5k5baf *state, u16 addr, u16 val)
{
        s5k5baf_i2c_write(state, REG_CMDWR_ADDR, addr);
        s5k5baf_i2c_write(state, REG_CMD_BUF, val);
}

static void s5k5baf_write_arr_seq(struct s5k5baf *state, u16 addr,
                                  u16 count, const u16 *seq)
{
        struct i2c_client *c = v4l2_get_subdevdata(&state->sd);
        __be16 buf[65];

        s5k5baf_i2c_write(state, REG_CMDWR_ADDR, addr);
        if (state->error)
                return;

        v4l2_dbg(3, debug, c, "i2c_write_seq(count=%d): %*ph\n", count,
                 min(2 * count, 64), seq);

        buf[0] = cpu_to_be16(REG_CMD_BUF);

        while (count > 0) {
                int n = min_t(int, count, ARRAY_SIZE(buf) - 1);
                int ret, i;

                for (i = 1; i <= n; ++i)
                        buf[i] = cpu_to_be16(*seq++);

                i *= 2;
                ret = i2c_master_send(c, (char *)buf, i);
                if (ret != i) {
                        v4l2_err(c, "i2c_write_seq: error during transfer (%d)\n", ret);
                        state->error = ret;
                        break;
                }

                count -= n;
        }
}

#define s5k5baf_write_seq(state, addr, seq...) \
        s5k5baf_write_arr_seq(state, addr, sizeof((char[]){ seq }), \
                              (const u16 []){ seq });

/* add items count at the beginning of the list */
#define NSEQ(seq...) sizeof((char[]){ seq }), seq

/*
 * s5k5baf_write_nseq() - Writes sequences of values to sensor memory via i2c
 * @nseq: sequence of u16 words in format:
 *      (N, address, value[1]...value[N-1])*,0
 * Ex.:
 *      u16 seq[] = { NSEQ(0x4000, 1, 1), NSEQ(0x4010, 640, 480), 0 };
 *      ret = s5k5baf_write_nseq(c, seq);
 */
static void s5k5baf_write_nseq(struct s5k5baf *state, const u16 *nseq)
{
        int count;

        while ((count = *nseq++)) {
                u16 addr = *nseq++;
                --count;

                s5k5baf_write_arr_seq(state, addr, count, nseq);
                nseq += count;
        }
}

static void s5k5baf_synchronize(struct s5k5baf *state, int timeout, u16 addr)
{
        unsigned long end = jiffies + msecs_to_jiffies(timeout);
        u16 reg;

        s5k5baf_write(state, addr, 1);
        do {
                reg = s5k5baf_read(state, addr);
                if (state->error || !reg)
                        return;
                usleep_range(5000, 10000);
        } while (time_is_after_jiffies(end));

        v4l2_err(&state->sd, "timeout on register synchronize (%#x)\n", addr);
        state->error = -ETIMEDOUT;
}

static u16 *s5k5baf_fw_get_seq(struct s5k5baf *state, u16 seq_id)
{
        struct s5k5baf_fw *fw = state->fw;
        u16 *data;
        int i;

        if (fw == NULL)
                return NULL;

        data = fw->data + 2 * fw->count;

        for (i = 0; i < fw->count; ++i) {
                if (fw->seq[i].id == seq_id)
                        return data + fw->seq[i].offset;
        }

        return NULL;
}

static void s5k5baf_hw_patch(struct s5k5baf *state)
{
        u16 *seq = s5k5baf_fw_get_seq(state, S5K5BAF_FW_ID_PATCH);

        if (seq)
                s5k5baf_write_nseq(state, seq);
}

static void s5k5baf_hw_set_clocks(struct s5k5baf *state)
{
        unsigned long mclk = state->mclk_frequency / 1000;
        u16 status;
        static const u16 nseq_clk_cfg[] = {
                NSEQ(REG_I_USE_NPVI_CLOCKS,
                  NPVI_CLOCKS, NMIPI_CLOCKS, 0,
                  SCLK_PVI_FREQ / 4, PCLK_MIN_FREQ / 4, PCLK_MAX_FREQ / 4,
                  SCLK_MIPI_FREQ / 4, PCLK_MIN_FREQ / 4, PCLK_MAX_FREQ / 4),
                NSEQ(REG_I_USE_REGS_API, 1),
                0
        };

        s5k5baf_write_seq(state, REG_I_INCLK_FREQ_L, mclk & 0xffff, mclk >> 16);
        s5k5baf_write_nseq(state, nseq_clk_cfg);

        s5k5baf_synchronize(state, 250, REG_I_INIT_PARAMS_UPDATED);
        status = s5k5baf_read(state, REG_I_ERROR_INFO);
        if (!state->error && status) {
                v4l2_err(&state->sd, "error configuring PLL (%d)\n", status);
                state->error = -EINVAL;
        }
}

/* set custom color correction matrices for various illuminations */
static void s5k5baf_hw_set_ccm(struct s5k5baf *state)
{
        u16 *seq = s5k5baf_fw_get_seq(state, S5K5BAF_FW_ID_CCM);

        if (seq)
                s5k5baf_write_nseq(state, seq);
}

/* CIS sensor tuning, based on undocumented android driver code */
static void s5k5baf_hw_set_cis(struct s5k5baf *state)
{
        u16 *seq = s5k5baf_fw_get_seq(state, S5K5BAF_FW_ID_CIS);

        if (!seq)
                return;

        s5k5baf_i2c_write(state, REG_CMDWR_PAGE, PAGE_IF_HW);
        s5k5baf_write_nseq(state, seq);
        s5k5baf_i2c_write(state, REG_CMDWR_PAGE, PAGE_IF_SW);
}

static void s5k5baf_hw_sync_cfg(struct s5k5baf *state)
{
        s5k5baf_write(state, REG_G_PREV_CFG_CHG, 1);
        if (state->apply_crop) {
                s5k5baf_write(state, REG_G_INPUTS_CHANGE_REQ, 1);
                s5k5baf_write(state, REG_G_PREV_CFG_BYPASS_CHANGED, 1);
        }
        s5k5baf_synchronize(state, 500, REG_G_NEW_CFG_SYNC);
}
/* Set horizontal and vertical image flipping */
static void s5k5baf_hw_set_mirror(struct s5k5baf *state)
{
        u16 flip = state->ctrls.vflip->val | (state->ctrls.vflip->val << 1);

        s5k5baf_write(state, REG_P_PREV_MIRROR(0), flip);
        if (state->streaming)
                s5k5baf_hw_sync_cfg(state);
}

static void s5k5baf_hw_set_alg(struct s5k5baf *state, u16 alg, bool enable)
{
        u16 cur_alg, new_alg;

        if (!state->valid_auto_alg)
                cur_alg = s5k5baf_read(state, REG_DBG_AUTOALG_EN);
        else
                cur_alg = state->auto_alg;

        new_alg = enable ? (cur_alg | alg) : (cur_alg & ~alg);

        if (new_alg != cur_alg)
                s5k5baf_write(state, REG_DBG_AUTOALG_EN, new_alg);

        if (state->error)
                return;

        state->valid_auto_alg = 1;
        state->auto_alg = new_alg;
}

/* Configure auto/manual white balance and R/G/B gains */
static void s5k5baf_hw_set_awb(struct s5k5baf *state, int awb)
{
        struct s5k5baf_ctrls *ctrls = &state->ctrls;

        if (!awb)
                s5k5baf_write_seq(state, REG_SF_RGAIN,
                                  ctrls->gain_red->val, 1,
                                  S5K5BAF_GAIN_GREEN_DEF, 1,
                                  ctrls->gain_blue->val, 1,
                                  1);

        s5k5baf_hw_set_alg(state, AALG_WB_EN, awb);
}

/* Program FW with exposure time, 'exposure' in us units */
static void s5k5baf_hw_set_user_exposure(struct s5k5baf *state, int exposure)
{
        unsigned int time = exposure / 10;

        s5k5baf_write_seq(state, REG_SF_USR_EXPOSURE_L,
                          time & 0xffff, time >> 16, 1);
}

static void s5k5baf_hw_set_user_gain(struct s5k5baf *state, int gain)
{
        s5k5baf_write_seq(state, REG_SF_USR_TOT_GAIN, gain, 1);
}

/* Set auto/manual exposure and total gain */
static void s5k5baf_hw_set_auto_exposure(struct s5k5baf *state, int value)
{
        if (value == V4L2_EXPOSURE_AUTO) {
                s5k5baf_hw_set_alg(state, AALG_AE_EN | AALG_DIVLEI_EN, true);
        } else {
                unsigned int exp_time = state->ctrls.exposure->val;

                s5k5baf_hw_set_user_exposure(state, exp_time);
                s5k5baf_hw_set_user_gain(state, state->ctrls.gain->val);
                s5k5baf_hw_set_alg(state, AALG_AE_EN | AALG_DIVLEI_EN, false);
        }
}

static void s5k5baf_hw_set_anti_flicker(struct s5k5baf *state, int v)
{
        if (v == V4L2_CID_POWER_LINE_FREQUENCY_AUTO) {
                s5k5baf_hw_set_alg(state, AALG_FLICKER_EN, true);
        } else {
                /* The V4L2_CID_LINE_FREQUENCY control values match
                 * the register values */
                s5k5baf_write_seq(state, REG_SF_FLICKER_QUANT, v, 1);
                s5k5baf_hw_set_alg(state, AALG_FLICKER_EN, false);
        }
}

static void s5k5baf_hw_set_colorfx(struct s5k5baf *state, int val)
{
        static const u16 colorfx[] = {
                [V4L2_COLORFX_NONE] = 0,
                [V4L2_COLORFX_BW] = 1,
                [V4L2_COLORFX_NEGATIVE] = 2,
                [V4L2_COLORFX_SEPIA] = 3,
                [V4L2_COLORFX_SKY_BLUE] = 4,
                [V4L2_COLORFX_SKETCH] = 5,
        };

        s5k5baf_write(state, REG_G_SPEC_EFFECTS, colorfx[val]);
}

static int s5k5baf_find_pixfmt(struct v4l2_mbus_framefmt *mf)
{
        int i, c = -1;

        for (i = 0; i < ARRAY_SIZE(s5k5baf_formats); i++) {
                if (mf->colorspace != s5k5baf_formats[i].colorspace)
                        continue;
                if (mf->code == s5k5baf_formats[i].code)
                        return i;
                if (c < 0)
                        c = i;
        }
        return (c < 0) ? 0 : c;
}

static int s5k5baf_clear_error(struct s5k5baf *state)
{
        int ret = state->error;

        state->error = 0;
        return ret;
}

static int s5k5baf_hw_set_video_bus(struct s5k5baf *state)
{
        u16 en_pkts;

        if (state->bus_type == V4L2_MBUS_CSI2_DPHY)
                en_pkts = EN_PACKETS_CSI2;
        else
                en_pkts = 0;

        s5k5baf_write_seq(state, REG_OIF_EN_MIPI_LANES,
                          state->nlanes, en_pkts, 1);

        return s5k5baf_clear_error(state);
}

static u16 s5k5baf_get_cfg_error(struct s5k5baf *state)
{
        u16 err = s5k5baf_read(state, REG_G_PREV_CFG_ERROR);
        if (err)
                s5k5baf_write(state, REG_G_PREV_CFG_ERROR, 0);
        return err;
}

static void s5k5baf_hw_set_fiv(struct s5k5baf *state, u16 fiv)
{
        s5k5baf_write(state, REG_P_MAX_FR_TIME(0), fiv);
        s5k5baf_hw_sync_cfg(state);
}

static void s5k5baf_hw_find_min_fiv(struct s5k5baf *state)
{
        u16 err, fiv;
        int n;

        fiv = s5k5baf_read(state,  REG_G_ACTUAL_P_FR_TIME);
        if (state->error)
                return;

        for (n = 5; n > 0; --n) {
                s5k5baf_hw_set_fiv(state, fiv);
                err = s5k5baf_get_cfg_error(state);
                if (state->error)
                        return;
                switch (err) {
                case CFG_ERROR_RANGE:
                        ++fiv;
                        break;
                case 0:
                        state->fiv = fiv;
                        v4l2_info(&state->sd,
                                  "found valid frame interval: %d00us\n", fiv);
                        return;
                default:
                        v4l2_err(&state->sd,
                                 "error setting frame interval: %d\n", err);
                        state->error = -EINVAL;
                }
        }
        v4l2_err(&state->sd, "cannot find correct frame interval\n");
        state->error = -ERANGE;
}

static void s5k5baf_hw_validate_cfg(struct s5k5baf *state)
{
        u16 err;

        err = s5k5baf_get_cfg_error(state);
        if (state->error)
                return;

        switch (err) {
        case 0:
                state->apply_cfg = 1;
                return;
        case CFG_ERROR_RANGE:
                s5k5baf_hw_find_min_fiv(state);
                if (!state->error)
                        state->apply_cfg = 1;
                return;
        default:
                v4l2_err(&state->sd,
                         "error setting format: %d\n", err);
                state->error = -EINVAL;
        }
}

static void s5k5baf_rescale(struct v4l2_rect *r, const struct v4l2_rect *v,
                            const struct v4l2_rect *n,
                            const struct v4l2_rect *d)
{
        r->left = v->left * n->width / d->width;
        r->top = v->top * n->height / d->height;
        r->width = v->width * n->width / d->width;
        r->height = v->height * n->height / d->height;
}

static int s5k5baf_hw_set_crop_rects(struct s5k5baf *state)
{
        struct v4l2_rect *p, r;
        u16 err;
        int ret;

        p = &state->crop_sink;
        s5k5baf_write_seq(state, REG_G_PREVREQ_IN_WIDTH, p->width, p->height,
                          p->left, p->top);

        s5k5baf_rescale(&r, &state->crop_source, &state->crop_sink,
                        &state->compose);
        s5k5baf_write_seq(state, REG_G_PREVZOOM_IN_WIDTH, r.width, r.height,
                          r.left, r.top);

        s5k5baf_synchronize(state, 500, REG_G_INPUTS_CHANGE_REQ);
        s5k5baf_synchronize(state, 500, REG_G_PREV_CFG_BYPASS_CHANGED);
        err = s5k5baf_get_cfg_error(state);
        ret = s5k5baf_clear_error(state);
        if (ret < 0)
                return ret;

        switch (err) {
        case 0:
                break;
        case CFG_ERROR_RANGE:
                /* retry crop with frame interval set to max */
                s5k5baf_hw_set_fiv(state, S5K5BAF_MAX_FR_TIME);
                err = s5k5baf_get_cfg_error(state);
                ret = s5k5baf_clear_error(state);
                if (ret < 0)
                        return ret;
                if (err) {
                        v4l2_err(&state->sd,
                                 "crop error on max frame interval: %d\n", err);
                        state->error = -EINVAL;
                }
                s5k5baf_hw_set_fiv(state, state->req_fiv);
                s5k5baf_hw_validate_cfg(state);
                break;
        default:
                v4l2_err(&state->sd, "crop error: %d\n", err);
                return -EINVAL;
        }

        if (!state->apply_cfg)
                return 0;

        p = &state->crop_source;
        s5k5baf_write_seq(state, REG_P_OUT_WIDTH(0), p->width, p->height);
        s5k5baf_hw_set_fiv(state, state->req_fiv);
        s5k5baf_hw_validate_cfg(state);

        return s5k5baf_clear_error(state);
}

static void s5k5baf_hw_set_config(struct s5k5baf *state)
{
        u16 reg_fmt = s5k5baf_formats[state->pixfmt].reg_p_fmt;
        struct v4l2_rect *r = &state->crop_source;

        s5k5baf_write_seq(state, REG_P_OUT_WIDTH(0),
                          r->width, r->height, reg_fmt,
                          PCLK_MAX_FREQ >> 2, PCLK_MIN_FREQ >> 2,
                          PVI_MASK_MIPI, CLK_MIPI_INDEX,
                          FR_RATE_FIXED, FR_RATE_Q_DYNAMIC,
                          state->req_fiv, S5K5BAF_MIN_FR_TIME);
        s5k5baf_hw_sync_cfg(state);
        s5k5baf_hw_validate_cfg(state);
}


static void s5k5baf_hw_set_test_pattern(struct s5k5baf *state, int id)
{
        s5k5baf_i2c_write(state, REG_PATTERN_WIDTH, 800);
        s5k5baf_i2c_write(state, REG_PATTERN_HEIGHT, 511);
        s5k5baf_i2c_write(state, REG_PATTERN_PARAM, 0);
        s5k5baf_i2c_write(state, REG_PATTERN_SET, id);
}

static void s5k5baf_gpio_assert(struct s5k5baf *state, int id)
{
        struct s5k5baf_gpio *gpio = &state->gpios[id];

        gpio_set_value(gpio->gpio, gpio->level);
}

static void s5k5baf_gpio_deassert(struct s5k5baf *state, int id)
{
        struct s5k5baf_gpio *gpio = &state->gpios[id];

        gpio_set_value(gpio->gpio, !gpio->level);
}

static int s5k5baf_power_on(struct s5k5baf *state)
{
        int ret;

        ret = regulator_bulk_enable(S5K5BAF_NUM_SUPPLIES, state->supplies);
        if (ret < 0)
                goto err;

        ret = clk_set_rate(state->clock, state->mclk_frequency);
        if (ret < 0)
                goto err_reg_dis;

        ret = clk_prepare_enable(state->clock);
        if (ret < 0)
                goto err_reg_dis;

        v4l2_dbg(1, debug, &state->sd, "clock frequency: %ld\n",
                 clk_get_rate(state->clock));

        s5k5baf_gpio_deassert(state, STBY);
        usleep_range(50, 100);
        s5k5baf_gpio_deassert(state, RST);
        return 0;

err_reg_dis:
        regulator_bulk_disable(S5K5BAF_NUM_SUPPLIES, state->supplies);
err:
        v4l2_err(&state->sd, "%s() failed (%d)\n", __func__, ret);
        return ret;
}

static int s5k5baf_power_off(struct s5k5baf *state)
{
        int ret;

        state->streaming = 0;
        state->apply_cfg = 0;
        state->apply_crop = 0;

        s5k5baf_gpio_assert(state, RST);
        s5k5baf_gpio_assert(state, STBY);

        if (!IS_ERR(state->clock))
                clk_disable_unprepare(state->clock);

        ret = regulator_bulk_disable(S5K5BAF_NUM_SUPPLIES,
                                        state->supplies);
        if (ret < 0)
                v4l2_err(&state->sd, "failed to disable regulators\n");

        return 0;
}

static void s5k5baf_hw_init(struct s5k5baf *state)
{
        s5k5baf_i2c_write(state, AHB_MSB_ADDR_PTR, PAGE_IF_HW);
        s5k5baf_i2c_write(state, REG_CLEAR_HOST_INT, 0);
        s5k5baf_i2c_write(state, REG_SW_LOAD_COMPLETE, 1);
        s5k5baf_i2c_write(state, REG_CMDRD_PAGE, PAGE_IF_SW);
        s5k5baf_i2c_write(state, REG_CMDWR_PAGE, PAGE_IF_SW);
}

/*
 * V4L2 subdev core and video operations
 */

static void s5k5baf_initialize_data(struct s5k5baf *state)
{
        state->pixfmt = 0;
        state->req_fiv = 10000 / 15;
        state->fiv = state->req_fiv;
        state->valid_auto_alg = 0;
}

static int s5k5baf_load_setfile(struct s5k5baf *state)
{
        struct i2c_client *c = v4l2_get_subdevdata(&state->sd);
        const struct firmware *fw;
        int ret;

        ret = request_firmware(&fw, S5K5BAF_FW_FILENAME, &c->dev);
        if (ret < 0) {
                dev_warn(&c->dev, "firmware file (%s) not loaded\n",
                         S5K5BAF_FW_FILENAME);
                return ret;
        }

        ret = s5k5baf_fw_parse(&c->dev, &state->fw, fw->size / 2,
                               (__le16 *)fw->data);

        release_firmware(fw);

        return ret;
}

static int s5k5baf_set_power(struct v4l2_subdev *sd, int on)
{
        struct s5k5baf *state = to_s5k5baf(sd);
        int ret = 0;

        mutex_lock(&state->lock);

        if (state->power != !on)
                goto out;

        if (on) {
                if (state->fw == NULL)
                        s5k5baf_load_setfile(state);

                s5k5baf_initialize_data(state);
                ret = s5k5baf_power_on(state);
                if (ret < 0)
                        goto out;

                s5k5baf_hw_init(state);
                s5k5baf_hw_patch(state);
                s5k5baf_i2c_write(state, REG_SET_HOST_INT, 1);
                s5k5baf_hw_set_clocks(state);

                ret = s5k5baf_hw_set_video_bus(state);
                if (ret < 0)
                        goto out;

                s5k5baf_hw_set_cis(state);
                s5k5baf_hw_set_ccm(state);

                ret = s5k5baf_clear_error(state);
                if (!ret)
                        state->power++;
        } else {
                s5k5baf_power_off(state);
                state->power--;
        }

out:
        mutex_unlock(&state->lock);

        if (!ret && on)
                ret = v4l2_ctrl_handler_setup(&state->ctrls.handler);

        return ret;
}

static void s5k5baf_hw_set_stream(struct s5k5baf *state, int enable)
{
        s5k5baf_write_seq(state, REG_G_ENABLE_PREV, enable, 1);
}

static int s5k5baf_s_stream(struct v4l2_subdev *sd, int on)
{
        struct s5k5baf *state = to_s5k5baf(sd);
        int ret;

        mutex_lock(&state->lock);

        if (state->streaming == !!on) {
                ret = 0;
                goto out;
        }

        if (on) {
                s5k5baf_hw_set_config(state);
                ret = s5k5baf_hw_set_crop_rects(state);
                if (ret < 0)
                        goto out;
                s5k5baf_hw_set_stream(state, 1);
                s5k5baf_i2c_write(state, 0xb0cc, 0x000b);
        } else {
                s5k5baf_hw_set_stream(state, 0);
        }
        ret = s5k5baf_clear_error(state);
        if (!ret)
                state->streaming = !state->streaming;

out:
        mutex_unlock(&state->lock);

        return ret;
}

static int s5k5baf_g_frame_interval(struct v4l2_subdev *sd,
                                   struct v4l2_subdev_frame_interval *fi)
{
        struct s5k5baf *state = to_s5k5baf(sd);

        mutex_lock(&state->lock);
        fi->interval.numerator = state->fiv;
        fi->interval.denominator = 10000;
        mutex_unlock(&state->lock);

        return 0;
}

static void s5k5baf_set_frame_interval(struct s5k5baf *state,
                                       struct v4l2_subdev_frame_interval *fi)
{
        struct v4l2_fract *i = &fi->interval;

        if (fi->interval.denominator == 0)
                state->req_fiv = S5K5BAF_MAX_FR_TIME;
        else
                state->req_fiv = clamp_t(u32,
                                         i->numerator * 10000 / i->denominator,
                                         S5K5BAF_MIN_FR_TIME,
                                         S5K5BAF_MAX_FR_TIME);

        state->fiv = state->req_fiv;
        if (state->apply_cfg) {
                s5k5baf_hw_set_fiv(state, state->req_fiv);
                s5k5baf_hw_validate_cfg(state);
        }
        *i = (struct v4l2_fract){ state->fiv, 10000 };
        if (state->fiv == state->req_fiv)
                v4l2_info(&state->sd, "frame interval changed to %d00us\n",
                          state->fiv);
}

static int s5k5baf_s_frame_interval(struct v4l2_subdev *sd,
                                   struct v4l2_subdev_frame_interval *fi)
{
        struct s5k5baf *state = to_s5k5baf(sd);

        mutex_lock(&state->lock);
        s5k5baf_set_frame_interval(state, fi);
        mutex_unlock(&state->lock);
        return 0;
}

/*
 * V4L2 subdev pad level and video operations
 */
static int s5k5baf_enum_frame_interval(struct v4l2_subdev *sd,
                              struct v4l2_subdev_pad_config *cfg,
                              struct v4l2_subdev_frame_interval_enum *fie)
{
        if (fie->index > S5K5BAF_MAX_FR_TIME - S5K5BAF_MIN_FR_TIME ||
            fie->pad != PAD_CIS)
                return -EINVAL;

        v4l_bound_align_image(&fie->width, S5K5BAF_WIN_WIDTH_MIN,
                              S5K5BAF_CIS_WIDTH, 1,
                              &fie->height, S5K5BAF_WIN_HEIGHT_MIN,
                              S5K5BAF_CIS_HEIGHT, 1, 0);

        fie->interval.numerator = S5K5BAF_MIN_FR_TIME + fie->index;
        fie->interval.denominator = 10000;

        return 0;
}

static int s5k5baf_enum_mbus_code(struct v4l2_subdev *sd,
                                 struct v4l2_subdev_pad_config *cfg,
                                 struct v4l2_subdev_mbus_code_enum *code)
{
        if (code->pad == PAD_CIS) {
                if (code->index > 0)
                        return -EINVAL;
                code->code = MEDIA_BUS_FMT_FIXED;
                return 0;
        }

        if (code->index >= ARRAY_SIZE(s5k5baf_formats))
                return -EINVAL;

        code->code = s5k5baf_formats[code->index].code;
        return 0;
}

static int s5k5baf_enum_frame_size(struct v4l2_subdev *sd,
                                  struct v4l2_subdev_pad_config *cfg,
                                  struct v4l2_subdev_frame_size_enum *fse)
{
        int i;

        if (fse->index > 0)
                return -EINVAL;

        if (fse->pad == PAD_CIS) {
                fse->code = MEDIA_BUS_FMT_FIXED;
                fse->min_width = S5K5BAF_CIS_WIDTH;
                fse->max_width = S5K5BAF_CIS_WIDTH;
                fse->min_height = S5K5BAF_CIS_HEIGHT;
                fse->max_height = S5K5BAF_CIS_HEIGHT;
                return 0;
        }

        i = ARRAY_SIZE(s5k5baf_formats);
        while (--i)
                if (fse->code == s5k5baf_formats[i].code)
                        break;
        fse->code = s5k5baf_formats[i].code;
        fse->min_width = S5K5BAF_WIN_WIDTH_MIN;
        fse->max_width = S5K5BAF_CIS_WIDTH;
        fse->max_height = S5K5BAF_WIN_HEIGHT_MIN;
        fse->min_height = S5K5BAF_CIS_HEIGHT;

        return 0;
}

static void s5k5baf_try_cis_format(struct v4l2_mbus_framefmt *mf)
{
        mf->width = S5K5BAF_CIS_WIDTH;
        mf->height = S5K5BAF_CIS_HEIGHT;
        mf->code = MEDIA_BUS_FMT_FIXED;
        mf->colorspace = V4L2_COLORSPACE_JPEG;
        mf->field = V4L2_FIELD_NONE;
}

static int s5k5baf_try_isp_format(struct v4l2_mbus_framefmt *mf)
{
        int pixfmt;

        v4l_bound_align_image(&mf->width, S5K5BAF_WIN_WIDTH_MIN,
                              S5K5BAF_CIS_WIDTH, 1,
                              &mf->height, S5K5BAF_WIN_HEIGHT_MIN,
                              S5K5BAF_CIS_HEIGHT, 1, 0);

        pixfmt = s5k5baf_find_pixfmt(mf);

        mf->colorspace = s5k5baf_formats[pixfmt].colorspace;
        mf->code = s5k5baf_formats[pixfmt].code;
        mf->field = V4L2_FIELD_NONE;

        return pixfmt;
}

static int s5k5baf_get_fmt(struct v4l2_subdev *sd, struct v4l2_subdev_pad_config *cfg,
                          struct v4l2_subdev_format *fmt)
{
        struct s5k5baf *state = to_s5k5baf(sd);
        const struct s5k5baf_pixfmt *pixfmt;
        struct v4l2_mbus_framefmt *mf;

        if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) {
                mf = v4l2_subdev_get_try_format(sd, cfg, fmt->pad);
                fmt->format = *mf;
                return 0;
        }

        mf = &fmt->format;
        if (fmt->pad == PAD_CIS) {
                s5k5baf_try_cis_format(mf);
                return 0;
        }
        mf->field = V4L2_FIELD_NONE;
        mutex_lock(&state->lock);
        pixfmt = &s5k5baf_formats[state->pixfmt];
        mf->width = state->crop_source.width;
        mf->height = state->crop_source.height;
        mf->code = pixfmt->code;
        mf->colorspace = pixfmt->colorspace;
        mutex_unlock(&state->lock);

        return 0;
}

static int s5k5baf_set_fmt(struct v4l2_subdev *sd, struct v4l2_subdev_pad_config *cfg,
                          struct v4l2_subdev_format *fmt)
{
        struct v4l2_mbus_framefmt *mf = &fmt->format;
        struct s5k5baf *state = to_s5k5baf(sd);
        const struct s5k5baf_pixfmt *pixfmt;
        int ret = 0;

        mf->field = V4L2_FIELD_NONE;

        if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) {
                *v4l2_subdev_get_try_format(sd, cfg, fmt->pad) = *mf;
                return 0;
        }

        if (fmt->pad == PAD_CIS) {
                s5k5baf_try_cis_format(mf);
                return 0;
        }

        mutex_lock(&state->lock);

        if (state->streaming) {
                mutex_unlock(&state->lock);
                return -EBUSY;
        }

        state->pixfmt = s5k5baf_try_isp_format(mf);
        pixfmt = &s5k5baf_formats[state->pixfmt];
        mf->code = pixfmt->code;
        mf->colorspace = pixfmt->colorspace;
        mf->width = state->crop_source.width;
        mf->height = state->crop_source.height;

        mutex_unlock(&state->lock);
        return ret;
}

enum selection_rect { R_CIS, R_CROP_SINK, R_COMPOSE, R_CROP_SOURCE, R_INVALID };

static enum selection_rect s5k5baf_get_sel_rect(u32 pad, u32 target)
{
        switch (target) {
        case V4L2_SEL_TGT_CROP_BOUNDS:
                return pad ? R_COMPOSE : R_CIS;
        case V4L2_SEL_TGT_CROP:
                return pad ? R_CROP_SOURCE : R_CROP_SINK;
        case V4L2_SEL_TGT_COMPOSE_BOUNDS:
                return pad ? R_INVALID : R_CROP_SINK;
        case V4L2_SEL_TGT_COMPOSE:
                return pad ? R_INVALID : R_COMPOSE;
        default:
                return R_INVALID;
        }
}

static int s5k5baf_is_bound_target(u32 target)
{
        return target == V4L2_SEL_TGT_CROP_BOUNDS ||
                target == V4L2_SEL_TGT_COMPOSE_BOUNDS;
}

static int s5k5baf_get_selection(struct v4l2_subdev *sd,
                                 struct v4l2_subdev_pad_config *cfg,
                                 struct v4l2_subdev_selection *sel)
{
        enum selection_rect rtype;
        struct s5k5baf *state = to_s5k5baf(sd);

        rtype = s5k5baf_get_sel_rect(sel->pad, sel->target);

        switch (rtype) {
        case R_INVALID:
                return -EINVAL;
        case R_CIS:
                sel->r = s5k5baf_cis_rect;
                return 0;
        default:
                break;
        }

        if (sel->which == V4L2_SUBDEV_FORMAT_TRY) {
                if (rtype == R_COMPOSE)
                        sel->r = *v4l2_subdev_get_try_compose(sd, cfg, sel->pad);
                else
                        sel->r = *v4l2_subdev_get_try_crop(sd, cfg, sel->pad);
                return 0;
        }

        mutex_lock(&state->lock);
        switch (rtype) {
        case R_CROP_SINK:
                sel->r = state->crop_sink;
                break;
        case R_COMPOSE:
                sel->r = state->compose;
                break;
        case R_CROP_SOURCE:
                sel->r = state->crop_source;
                break;
        default:
                break;
        }
        if (s5k5baf_is_bound_target(sel->target)) {
                sel->r.left = 0;
                sel->r.top = 0;
        }
        mutex_unlock(&state->lock);

        return 0;
}

/* bounds range [start, start+len) to [0, max) and aligns to 2 */
static void s5k5baf_bound_range(u32 *start, u32 *len, u32 max)
{
        if (*len > max)
                *len = max;
        if (*start + *len > max)
                *start = max - *len;
        *start &= ~1;
        *len &= ~1;
        if (*len < S5K5BAF_WIN_WIDTH_MIN)
                *len = S5K5BAF_WIN_WIDTH_MIN;
}

static void s5k5baf_bound_rect(struct v4l2_rect *r, u32 width, u32 height)
{
        s5k5baf_bound_range(&r->left, &r->width, width);
        s5k5baf_bound_range(&r->top, &r->height, height);
}

static void s5k5baf_set_rect_and_adjust(struct v4l2_rect **rects,
                                        enum selection_rect first,
                                        struct v4l2_rect *v)
{
        struct v4l2_rect *r, *br;
        enum selection_rect i = first;

        *rects[first] = *v;
        do {
                r = rects[i];
                br = rects[i - 1];
                s5k5baf_bound_rect(r, br->width, br->height);
        } while (++i != R_INVALID);
        *v = *rects[first];
}

static bool s5k5baf_cmp_rect(const struct v4l2_rect *r1,
                             const struct v4l2_rect *r2)
{
        return !memcmp(r1, r2, sizeof(*r1));
}

static int s5k5baf_set_selection(struct v4l2_subdev *sd,
                                 struct v4l2_subdev_pad_config *cfg,
                                 struct v4l2_subdev_selection *sel)
{
        static enum selection_rect rtype;
        struct s5k5baf *state = to_s5k5baf(sd);
        struct v4l2_rect **rects;
        int ret = 0;

        rtype = s5k5baf_get_sel_rect(sel->pad, sel->target);
        if (rtype == R_INVALID || s5k5baf_is_bound_target(sel->target))
                return -EINVAL;

        /* allow only scaling on compose */
        if (rtype == R_COMPOSE) {
                sel->r.left = 0;
                sel->r.top = 0;
        }

        if (sel->which == V4L2_SUBDEV_FORMAT_TRY) {
                rects = (struct v4l2_rect * []) {
                                &s5k5baf_cis_rect,
                                v4l2_subdev_get_try_crop(sd, cfg, PAD_CIS),
                                v4l2_subdev_get_try_compose(sd, cfg, PAD_CIS),
                                v4l2_subdev_get_try_crop(sd, cfg, PAD_OUT)
                        };
                s5k5baf_set_rect_and_adjust(rects, rtype, &sel->r);
                return 0;
        }

        rects = (struct v4l2_rect * []) {
                        &s5k5baf_cis_rect,
                        &state->crop_sink,
                        &state->compose,
                        &state->crop_source
                };
        mutex_lock(&state->lock);
        if (state->streaming) {
                /* adjust sel->r to avoid output resolution change */
                if (rtype < R_CROP_SOURCE) {
                        if (sel->r.width < state->crop_source.width)
                                sel->r.width = state->crop_source.width;
                        if (sel->r.height < state->crop_source.height)
                                sel->r.height = state->crop_source.height;
                } else {
                        sel->r.width = state->crop_source.width;
                        sel->r.height = state->crop_source.height;
                }
        }
        s5k5baf_set_rect_and_adjust(rects, rtype, &sel->r);
        if (!s5k5baf_cmp_rect(&state->crop_sink, &s5k5baf_cis_rect) ||
            !s5k5baf_cmp_rect(&state->compose, &s5k5baf_cis_rect))
                state->apply_crop = 1;
        if (state->streaming)
                ret = s5k5baf_hw_set_crop_rects(state);
        mutex_unlock(&state->lock);

        return ret;
}

static const struct v4l2_subdev_pad_ops s5k5baf_cis_pad_ops = {
        .enum_mbus_code         = s5k5baf_enum_mbus_code,
        .enum_frame_size        = s5k5baf_enum_frame_size,
        .get_fmt                = s5k5baf_get_fmt,
        .set_fmt                = s5k5baf_set_fmt,
};

static const struct v4l2_subdev_pad_ops s5k5baf_pad_ops = {
        .enum_mbus_code         = s5k5baf_enum_mbus_code,
        .enum_frame_size        = s5k5baf_enum_frame_size,
        .enum_frame_interval    = s5k5baf_enum_frame_interval,
        .get_fmt                = s5k5baf_get_fmt,
        .set_fmt                = s5k5baf_set_fmt,
        .get_selection          = s5k5baf_get_selection,
        .set_selection          = s5k5baf_set_selection,
};

static const struct v4l2_subdev_video_ops s5k5baf_video_ops = {
        .g_frame_interval       = s5k5baf_g_frame_interval,
        .s_frame_interval       = s5k5baf_s_frame_interval,
        .s_stream               = s5k5baf_s_stream,
};

/*
 * V4L2 subdev controls
 */

static int s5k5baf_s_ctrl(struct v4l2_ctrl *ctrl)
{
        struct v4l2_subdev *sd = ctrl_to_sd(ctrl);
        struct s5k5baf *state = to_s5k5baf(sd);
        int ret;

        v4l2_dbg(1, debug, sd, "ctrl: %s, value: %d\n", ctrl->name, ctrl->val);

        mutex_lock(&state->lock);

        if (state->power == 0)
                goto unlock;

        switch (ctrl->id) {
        case V4L2_CID_AUTO_WHITE_BALANCE:
                s5k5baf_hw_set_awb(state, ctrl->val);
                break;

        case V4L2_CID_BRIGHTNESS:
                s5k5baf_write(state, REG_USER_BRIGHTNESS, ctrl->val);
                break;

        case V4L2_CID_COLORFX:
                s5k5baf_hw_set_colorfx(state, ctrl->val);
                break;

        case V4L2_CID_CONTRAST:
                s5k5baf_write(state, REG_USER_CONTRAST, ctrl->val);
                break;

        case V4L2_CID_EXPOSURE_AUTO:
                s5k5baf_hw_set_auto_exposure(state, ctrl->val);
                break;

        case V4L2_CID_HFLIP:
                s5k5baf_hw_set_mirror(state);
                break;

        case V4L2_CID_POWER_LINE_FREQUENCY:
                s5k5baf_hw_set_anti_flicker(state, ctrl->val);
                break;

        case V4L2_CID_SATURATION:
                s5k5baf_write(state, REG_USER_SATURATION, ctrl->val);
                break;

        case V4L2_CID_SHARPNESS:
                s5k5baf_write(state, REG_USER_SHARPBLUR, ctrl->val);
                break;

        case V4L2_CID_WHITE_BALANCE_TEMPERATURE:
                s5k5baf_write(state, REG_P_COLORTEMP(0), ctrl->val);
                if (state->apply_cfg)
                        s5k5baf_hw_sync_cfg(state);
                break;

        case V4L2_CID_TEST_PATTERN:
                s5k5baf_hw_set_test_pattern(state, ctrl->val);
                break;
        }
unlock:
        ret = s5k5baf_clear_error(state);
        mutex_unlock(&state->lock);
        return ret;
}

static const struct v4l2_ctrl_ops s5k5baf_ctrl_ops = {
        .s_ctrl = s5k5baf_s_ctrl,
};

static const char * const s5k5baf_test_pattern_menu[] = {
        "Disabled",
        "Blank",
        "Bars",
        "Gradients",
        "Textile",
        "Textile2",
        "Squares"
};

static int s5k5baf_initialize_ctrls(struct s5k5baf *state)
{
        const struct v4l2_ctrl_ops *ops = &s5k5baf_ctrl_ops;
        struct s5k5baf_ctrls *ctrls = &state->ctrls;
        struct v4l2_ctrl_handler *hdl = &ctrls->handler;
        int ret;

        ret = v4l2_ctrl_handler_init(hdl, 16);
        if (ret < 0) {
                v4l2_err(&state->sd, "cannot init ctrl handler (%d)\n", ret);
                return ret;
        }

        /* Auto white balance cluster */
        ctrls->awb = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_AUTO_WHITE_BALANCE,
                                       0, 1, 1, 1);
        ctrls->gain_red = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_RED_BALANCE,
                                            0, 255, 1, S5K5BAF_GAIN_RED_DEF);
        ctrls->gain_blue = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_BLUE_BALANCE,
                                             0, 255, 1, S5K5BAF_GAIN_BLUE_DEF);
        v4l2_ctrl_auto_cluster(3, &ctrls->awb, 0, false);

        ctrls->hflip = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_HFLIP, 0, 1, 1, 0);
        ctrls->vflip = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_VFLIP, 0, 1, 1, 0);
        v4l2_ctrl_cluster(2, &ctrls->hflip);

        ctrls->auto_exp = v4l2_ctrl_new_std_menu(hdl, ops,
                                V4L2_CID_EXPOSURE_AUTO,
                                V4L2_EXPOSURE_MANUAL, 0, V4L2_EXPOSURE_AUTO);
        /* Exposure time: x 1 us */
        ctrls->exposure = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_EXPOSURE,
                                            0, 6000000U, 1, 100000U);
        /* Total gain: 256 <=> 1x */
        ctrls->gain = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_GAIN,
                                        0, 256, 1, 256);
        v4l2_ctrl_auto_cluster(3, &ctrls->auto_exp, 0, false);

        v4l2_ctrl_new_std_menu(hdl, ops, V4L2_CID_POWER_LINE_FREQUENCY,
                               V4L2_CID_POWER_LINE_FREQUENCY_AUTO, 0,
                               V4L2_CID_POWER_LINE_FREQUENCY_AUTO);

        v4l2_ctrl_new_std_menu(hdl, ops, V4L2_CID_COLORFX,
                               V4L2_COLORFX_SKY_BLUE, ~0x6f, V4L2_COLORFX_NONE);

        v4l2_ctrl_new_std(hdl, ops, V4L2_CID_WHITE_BALANCE_TEMPERATURE,
                          0, 256, 1, 0);

        v4l2_ctrl_new_std(hdl, ops, V4L2_CID_SATURATION, -127, 127, 1, 0);
        v4l2_ctrl_new_std(hdl, ops, V4L2_CID_BRIGHTNESS, -127, 127, 1, 0);
        v4l2_ctrl_new_std(hdl, ops, V4L2_CID_CONTRAST, -127, 127, 1, 0);
        v4l2_ctrl_new_std(hdl, ops, V4L2_CID_SHARPNESS, -127, 127, 1, 0);

        v4l2_ctrl_new_std_menu_items(hdl, ops, V4L2_CID_TEST_PATTERN,
                                     ARRAY_SIZE(s5k5baf_test_pattern_menu) - 1,
                                     0, 0, s5k5baf_test_pattern_menu);

        if (hdl->error) {
                v4l2_err(&state->sd, "error creating controls (%d)\n",
                         hdl->error);
                ret = hdl->error;
                v4l2_ctrl_handler_free(hdl);
                return ret;
        }

        state->sd.ctrl_handler = hdl;
        return 0;
}

/*
 * V4L2 subdev internal operations
 */
static int s5k5baf_open(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)
{
        struct v4l2_mbus_framefmt *mf;

        mf = v4l2_subdev_get_try_format(sd, fh->pad, PAD_CIS);
        s5k5baf_try_cis_format(mf);

        if (s5k5baf_is_cis_subdev(sd))
                return 0;

        mf = v4l2_subdev_get_try_format(sd, fh->pad, PAD_OUT);
        mf->colorspace = s5k5baf_formats[0].colorspace;
        mf->code = s5k5baf_formats[0].code;
        mf->width = s5k5baf_cis_rect.width;
        mf->height = s5k5baf_cis_rect.height;
        mf->field = V4L2_FIELD_NONE;

        *v4l2_subdev_get_try_crop(sd, fh->pad, PAD_CIS) = s5k5baf_cis_rect;
        *v4l2_subdev_get_try_compose(sd, fh->pad, PAD_CIS) = s5k5baf_cis_rect;
        *v4l2_subdev_get_try_crop(sd, fh->pad, PAD_OUT) = s5k5baf_cis_rect;

        return 0;
}

static int s5k5baf_check_fw_revision(struct s5k5baf *state)
{
        u16 api_ver = 0, fw_rev = 0, s_id = 0;
        int ret;

        api_ver = s5k5baf_read(state, REG_FW_APIVER);
        fw_rev = s5k5baf_read(state, REG_FW_REVISION) & 0xff;
        s_id = s5k5baf_read(state, REG_FW_SENSOR_ID);
        ret = s5k5baf_clear_error(state);
        if (ret < 0)
                return ret;

        v4l2_info(&state->sd, "FW API=%#x, revision=%#x sensor_id=%#x\n",
                  api_ver, fw_rev, s_id);

        if (api_ver != S5K5BAF_FW_APIVER) {
                v4l2_err(&state->sd, "FW API version not supported\n");
                return -ENODEV;
        }

        return 0;
}

static int s5k5baf_registered(struct v4l2_subdev *sd)
{
        struct s5k5baf *state = to_s5k5baf(sd);
        int ret;

        ret = v4l2_device_register_subdev(sd->v4l2_dev, &state->cis_sd);
        if (ret < 0)
                v4l2_err(sd, "failed to register subdev %s\n",
                         state->cis_sd.name);
        else
                ret = media_create_pad_link(&state->cis_sd.entity, PAD_CIS,
                                               &state->sd.entity, PAD_CIS,
                                               MEDIA_LNK_FL_IMMUTABLE |
                                               MEDIA_LNK_FL_ENABLED);
        return ret;
}

static void s5k5baf_unregistered(struct v4l2_subdev *sd)
{
        struct s5k5baf *state = to_s5k5baf(sd);
        v4l2_device_unregister_subdev(&state->cis_sd);
}

static const struct v4l2_subdev_ops s5k5baf_cis_subdev_ops = {
        .pad    = &s5k5baf_cis_pad_ops,
};

static const struct v4l2_subdev_internal_ops s5k5baf_cis_subdev_internal_ops = {
        .open = s5k5baf_open,
};

static const struct v4l2_subdev_internal_ops s5k5baf_subdev_internal_ops = {
        .registered = s5k5baf_registered,
        .unregistered = s5k5baf_unregistered,
        .open = s5k5baf_open,
};

static const struct v4l2_subdev_core_ops s5k5baf_core_ops = {
        .s_power = s5k5baf_set_power,
        .log_status = v4l2_ctrl_subdev_log_status,
};

static const struct v4l2_subdev_ops s5k5baf_subdev_ops = {
        .core = &s5k5baf_core_ops,
        .pad = &s5k5baf_pad_ops,
        .video = &s5k5baf_video_ops,
};

static int s5k5baf_configure_gpios(struct s5k5baf *state)
{
        static const char * const name[] = { "S5K5BAF_STBY", "S5K5BAF_RST" };
        struct i2c_client *c = v4l2_get_subdevdata(&state->sd);
        struct s5k5baf_gpio *g = state->gpios;
        int ret, i;

        for (i = 0; i < NUM_GPIOS; ++i) {
                int flags = GPIOF_DIR_OUT;
                if (g[i].level)
                        flags |= GPIOF_INIT_HIGH;
                ret = devm_gpio_request_one(&c->dev, g[i].gpio, flags, name[i]);
                if (ret < 0) {
                        v4l2_err(c, "failed to request gpio %s\n", name[i]);
                        return ret;
                }
        }
        return 0;
}

static int s5k5baf_parse_gpios(struct s5k5baf_gpio *gpios, struct device *dev)
{
        static const char * const names[] = {
                "stbyn-gpios",
                "rstn-gpios",
        };
        struct device_node *node = dev->of_node;
        enum of_gpio_flags flags;
        int ret, i;

        for (i = 0; i < NUM_GPIOS; ++i) {
                ret = of_get_named_gpio_flags(node, names[i], 0, &flags);
                if (ret < 0) {
                        dev_err(dev, "no %s GPIO pin provided\n", names[i]);
                        return ret;
                }
                gpios[i].gpio = ret;
                gpios[i].level = !(flags & OF_GPIO_ACTIVE_LOW);
        }

        return 0;
}

static int s5k5baf_parse_device_node(struct s5k5baf *state, struct device *dev)
{
        struct device_node *node = dev->of_node;
        struct device_node *node_ep;
        struct v4l2_fwnode_endpoint ep = { .bus_type = 0 };
        int ret;

        if (!node) {
                dev_err(dev, "no device-tree node provided\n");
                return -EINVAL;
        }

        ret = of_property_read_u32(node, "clock-frequency",
                                   &state->mclk_frequency);
        if (ret < 0) {
                state->mclk_frequency = S5K5BAF_DEFAULT_MCLK_FREQ;
                dev_info(dev, "using default %u Hz clock frequency\n",
                         state->mclk_frequency);
        }

        ret = s5k5baf_parse_gpios(state->gpios, dev);
        if (ret < 0)
                return ret;

        node_ep = of_graph_get_next_endpoint(node, NULL);
        if (!node_ep) {
                dev_err(dev, "no endpoint defined at node %pOF\n", node);
                return -EINVAL;
        }

        ret = v4l2_fwnode_endpoint_parse(of_fwnode_handle(node_ep), &ep);
        of_node_put(node_ep);
        if (ret)
                return ret;

        state->bus_type = ep.bus_type;

        switch (state->bus_type) {
        case V4L2_MBUS_CSI2_DPHY:
                state->nlanes = ep.bus.mipi_csi2.num_data_lanes;
                break;
        case V4L2_MBUS_PARALLEL:
                break;
        default:
                dev_err(dev, "unsupported bus in endpoint defined at node %pOF\n",
                        node);
                return -EINVAL;
        }

        return 0;
}

static int s5k5baf_configure_subdevs(struct s5k5baf *state,
                                     struct i2c_client *c)
{
        struct v4l2_subdev *sd;
        int ret;

        sd = &state->cis_sd;
        v4l2_subdev_init(sd, &s5k5baf_cis_subdev_ops);
        sd->owner = THIS_MODULE;
        v4l2_set_subdevdata(sd, state);
        snprintf(sd->name, sizeof(sd->name), "S5K5BAF-CIS %d-%04x",
                 i2c_adapter_id(c->adapter), c->addr);

        sd->internal_ops = &s5k5baf_cis_subdev_internal_ops;
        sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;

        state->cis_pad.flags = MEDIA_PAD_FL_SOURCE;
        sd->entity.function = MEDIA_ENT_F_CAM_SENSOR;
        ret = media_entity_pads_init(&sd->entity, NUM_CIS_PADS, &state->cis_pad);
        if (ret < 0)
                goto err;

        sd = &state->sd;
        v4l2_i2c_subdev_init(sd, c, &s5k5baf_subdev_ops);
        snprintf(sd->name, sizeof(sd->name), "S5K5BAF-ISP %d-%04x",
                 i2c_adapter_id(c->adapter), c->addr);

        sd->internal_ops = &s5k5baf_subdev_internal_ops;
        sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;

        state->pads[PAD_CIS].flags = MEDIA_PAD_FL_SINK;
        state->pads[PAD_OUT].flags = MEDIA_PAD_FL_SOURCE;
        sd->entity.function = MEDIA_ENT_F_V4L2_SUBDEV_UNKNOWN;
        ret = media_entity_pads_init(&sd->entity, NUM_ISP_PADS, state->pads);

        if (!ret)
                return 0;

        media_entity_cleanup(&state->cis_sd.entity);
err:
        dev_err(&c->dev, "cannot init media entity %s\n", sd->name);
        return ret;
}

static int s5k5baf_configure_regulators(struct s5k5baf *state)
{
        struct i2c_client *c = v4l2_get_subdevdata(&state->sd);
        int ret;
        int i;

        for (i = 0; i < S5K5BAF_NUM_SUPPLIES; i++)
                state->supplies[i].supply = s5k5baf_supply_names[i];

        ret = devm_regulator_bulk_get(&c->dev, S5K5BAF_NUM_SUPPLIES,
                                      state->supplies);
        if (ret < 0)
                v4l2_err(c, "failed to get regulators\n");
        return ret;
}

static int s5k5baf_probe(struct i2c_client *c)
{
        struct s5k5baf *state;
        int ret;

        state = devm_kzalloc(&c->dev, sizeof(*state), GFP_KERNEL);
        if (!state)
                return -ENOMEM;

        mutex_init(&state->lock);
        state->crop_sink = s5k5baf_cis_rect;
        state->compose = s5k5baf_cis_rect;
        state->crop_source = s5k5baf_cis_rect;

        ret = s5k5baf_parse_device_node(state, &c->dev);
        if (ret < 0)
                return ret;

        ret = s5k5baf_configure_subdevs(state, c);
        if (ret < 0)
                return ret;

        ret = s5k5baf_configure_gpios(state);
        if (ret < 0)
                goto err_me;

        ret = s5k5baf_configure_regulators(state);
        if (ret < 0)
                goto err_me;

        state->clock = devm_clk_get(state->sd.dev, S5K5BAF_CLK_NAME);
        if (IS_ERR(state->clock)) {
                ret = -EPROBE_DEFER;
                goto err_me;
        }

        ret = s5k5baf_power_on(state);
        if (ret < 0) {
                ret = -EPROBE_DEFER;
                goto err_me;
        }
        s5k5baf_hw_init(state);
        ret = s5k5baf_check_fw_revision(state);

        s5k5baf_power_off(state);
        if (ret < 0)
                goto err_me;

        ret = s5k5baf_initialize_ctrls(state);
        if (ret < 0)
                goto err_me;

        ret = v4l2_async_register_subdev(&state->sd);
        if (ret < 0)
                goto err_ctrl;

        return 0;

err_ctrl:
        v4l2_ctrl_handler_free(state->sd.ctrl_handler);
err_me:
        media_entity_cleanup(&state->sd.entity);
        media_entity_cleanup(&state->cis_sd.entity);
        return ret;
}

static int s5k5baf_remove(struct i2c_client *c)
{
        struct v4l2_subdev *sd = i2c_get_clientdata(c);
        struct s5k5baf *state = to_s5k5baf(sd);

        v4l2_async_unregister_subdev(sd);
        v4l2_ctrl_handler_free(sd->ctrl_handler);
        media_entity_cleanup(&sd->entity);

        sd = &state->cis_sd;
        v4l2_device_unregister_subdev(sd);
        media_entity_cleanup(&sd->entity);

        return 0;
}

static const struct i2c_device_id s5k5baf_id[] = {
        { S5K5BAF_DRIVER_NAME, 0 },
        { },
};
MODULE_DEVICE_TABLE(i2c, s5k5baf_id);

static const struct of_device_id s5k5baf_of_match[] = {
        { .compatible = "samsung,s5k5baf" },
        { }
};
MODULE_DEVICE_TABLE(of, s5k5baf_of_match);

static struct i2c_driver s5k5baf_i2c_driver = {
        .driver = {
                .of_match_table = s5k5baf_of_match,
                .name = S5K5BAF_DRIVER_NAME
        },
        .probe_new      = s5k5baf_probe,
        .remove         = s5k5baf_remove,
        .id_table       = s5k5baf_id,
};

module_i2c_driver(s5k5baf_i2c_driver);

MODULE_DESCRIPTION("Samsung S5K5BAF(X) UXGA camera driver");
MODULE_AUTHOR("Andrzej Hajda <a.hajda@samsung.com>");
MODULE_LICENSE("GPL v2");