/*
 * Copyright (C) 2012 Texas Instruments Inc
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation version 2.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
 *
 * Contributors:
 *      Manjunath Hadli <manjunath.hadli@ti.com>
 *      Prabhakar Lad <prabhakar.lad@ti.com>
 */

#include <linux/delay.h>
#include "dm365_isif.h"
#include "vpfe_mc_capture.h"

#define MAX_WIDTH       4096
#define MAX_HEIGHT      4096

static const unsigned int isif_fmts[] = {
        MEDIA_BUS_FMT_YUYV8_2X8,
        MEDIA_BUS_FMT_UYVY8_2X8,
        MEDIA_BUS_FMT_YUYV8_1X16,
        MEDIA_BUS_FMT_YUYV10_1X20,
        MEDIA_BUS_FMT_SGRBG12_1X12,
        MEDIA_BUS_FMT_SGRBG10_ALAW8_1X8,
        MEDIA_BUS_FMT_SGRBG10_DPCM8_1X8,
};

#define ISIF_COLPTN_R_Ye        0x0
#define ISIF_COLPTN_Gr_Cy       0x1
#define ISIF_COLPTN_Gb_G        0x2
#define ISIF_COLPTN_B_Mg        0x3

#define ISIF_CCOLP_CP01_0       0
#define ISIF_CCOLP_CP03_2       2
#define ISIF_CCOLP_CP05_4       4
#define ISIF_CCOLP_CP07_6       6
#define ISIF_CCOLP_CP11_0       8
#define ISIF_CCOLP_CP13_2       10
#define ISIF_CCOLP_CP15_4       12
#define ISIF_CCOLP_CP17_6       14

static const u32 isif_sgrbg_pattern =
        ISIF_COLPTN_Gr_Cy <<  ISIF_CCOLP_CP01_0 |
        ISIF_COLPTN_R_Ye  << ISIF_CCOLP_CP03_2 |
        ISIF_COLPTN_B_Mg  << ISIF_CCOLP_CP05_4 |
        ISIF_COLPTN_Gb_G  << ISIF_CCOLP_CP07_6 |
        ISIF_COLPTN_Gr_Cy << ISIF_CCOLP_CP11_0 |
        ISIF_COLPTN_R_Ye  << ISIF_CCOLP_CP13_2 |
        ISIF_COLPTN_B_Mg  << ISIF_CCOLP_CP15_4 |
        ISIF_COLPTN_Gb_G  << ISIF_CCOLP_CP17_6;

static const u32 isif_srggb_pattern =
        ISIF_COLPTN_R_Ye  << ISIF_CCOLP_CP01_0 |
        ISIF_COLPTN_Gr_Cy << ISIF_CCOLP_CP03_2 |
        ISIF_COLPTN_Gb_G  << ISIF_CCOLP_CP05_4 |
        ISIF_COLPTN_B_Mg  << ISIF_CCOLP_CP07_6 |
        ISIF_COLPTN_R_Ye  << ISIF_CCOLP_CP11_0 |
        ISIF_COLPTN_Gr_Cy << ISIF_CCOLP_CP13_2 |
        ISIF_COLPTN_Gb_G  << ISIF_CCOLP_CP15_4 |
        ISIF_COLPTN_B_Mg  << ISIF_CCOLP_CP17_6;

static inline u32 isif_read(void __iomem *base_addr, u32 offset)
{
        return readl(base_addr + offset);
}

static inline void isif_write(void __iomem *base_addr, u32 val, u32 offset)
{
        writel(val, base_addr + offset);
}

static inline u32 isif_merge(void __iomem *base_addr, u32 mask, u32 val,
                             u32 offset)
{
        u32 new_val = (isif_read(base_addr, offset) & ~mask) | (val & mask);

        isif_write(base_addr, new_val, offset);

        return new_val;
}

static void isif_enable_output_to_sdram(struct vpfe_isif_device *isif, int en)
{
        isif_merge(isif->isif_cfg.base_addr, ISIF_SYNCEN_WEN_MASK,
                   en << ISIF_SYNCEN_WEN_SHIFT, SYNCEN);
}

static inline void
isif_regw_lin_tbl(struct vpfe_isif_device *isif, u32 val, u32 offset, int i)
{
        if (!i)
                writel(val, isif->isif_cfg.linear_tbl0_addr + offset);
        else
                writel(val, isif->isif_cfg.linear_tbl1_addr + offset);
}

static void isif_disable_all_modules(struct vpfe_isif_device *isif)
{
        /* disable BC */
        isif_write(isif->isif_cfg.base_addr, 0, CLAMPCFG);
        /* disable vdfc */
        isif_write(isif->isif_cfg.base_addr, 0, DFCCTL);
        /* disable CSC */
        isif_write(isif->isif_cfg.base_addr, 0, CSCCTL);
        /* disable linearization */
        isif_write(isif->isif_cfg.base_addr, 0, LINCFG0);
}

static void isif_enable(struct vpfe_isif_device *isif, int en)
{
        if (!en)
                /* Before disable isif, disable all ISIF modules */
                isif_disable_all_modules(isif);

        /*
         * wait for next VD. Assume lowest scan rate is 12 Hz. So
         * 100 msec delay is good enough
         */
        msleep(100);
        isif_merge(isif->isif_cfg.base_addr, ISIF_SYNCEN_VDHDEN_MASK,
                   en, SYNCEN);
}

/*
 * ISIF helper functions
 */

#define DM365_ISIF_MDFS_OFFSET          15
#define DM365_ISIF_MDFS_MASK            0x1

/* get field id in isif hardware */
enum v4l2_field vpfe_isif_get_fid(struct vpfe_device *vpfe_dev)
{
        struct vpfe_isif_device *isif = &vpfe_dev->vpfe_isif;
        u32 field_status;

        field_status = isif_read(isif->isif_cfg.base_addr, MODESET);
        return (field_status >> DM365_ISIF_MDFS_OFFSET) &
                DM365_ISIF_MDFS_MASK;
}

static int
isif_set_pixel_format(struct vpfe_isif_device *isif, unsigned int pixfmt)
{
        if (isif->formats[ISIF_PAD_SINK].code == MEDIA_BUS_FMT_SGRBG12_1X12) {
                if (pixfmt == V4L2_PIX_FMT_SBGGR16)
                        isif->isif_cfg.data_pack = ISIF_PACK_16BIT;
                else if ((pixfmt == V4L2_PIX_FMT_SGRBG10DPCM8) ||
                                (pixfmt == V4L2_PIX_FMT_SGRBG10ALAW8))
                        isif->isif_cfg.data_pack = ISIF_PACK_8BIT;
                else
                        return -EINVAL;

                isif->isif_cfg.bayer.pix_fmt = ISIF_PIXFMT_RAW;
                isif->isif_cfg.bayer.v4l2_pix_fmt = pixfmt;
        } else {
                if (pixfmt == V4L2_PIX_FMT_YUYV)
                        isif->isif_cfg.ycbcr.pix_order = ISIF_PIXORDER_YCBYCR;
                else if (pixfmt == V4L2_PIX_FMT_UYVY)
                        isif->isif_cfg.ycbcr.pix_order = ISIF_PIXORDER_CBYCRY;
                else
                        return -EINVAL;

                isif->isif_cfg.data_pack = ISIF_PACK_8BIT;
                isif->isif_cfg.ycbcr.v4l2_pix_fmt = pixfmt;
        }

        return 0;
}

static int
isif_set_frame_format(struct vpfe_isif_device *isif,
                      enum isif_frmfmt frm_fmt)
{
        if (isif->formats[ISIF_PAD_SINK].code == MEDIA_BUS_FMT_SGRBG12_1X12)
                isif->isif_cfg.bayer.frm_fmt = frm_fmt;
        else
                isif->isif_cfg.ycbcr.frm_fmt = frm_fmt;

        return 0;
}

static int isif_set_image_window(struct vpfe_isif_device *isif)
{
        struct v4l2_rect *win = &isif->crop;

        if (isif->formats[ISIF_PAD_SINK].code == MEDIA_BUS_FMT_SGRBG12_1X12) {
                isif->isif_cfg.bayer.win.top = win->top;
                isif->isif_cfg.bayer.win.left = win->left;
                isif->isif_cfg.bayer.win.width = win->width;
                isif->isif_cfg.bayer.win.height = win->height;
                return 0;
        }
        isif->isif_cfg.ycbcr.win.top = win->top;
        isif->isif_cfg.ycbcr.win.left = win->left;
        isif->isif_cfg.ycbcr.win.width = win->width;
        isif->isif_cfg.ycbcr.win.height = win->height;

        return 0;
}

static int
isif_set_buftype(struct vpfe_isif_device *isif, enum isif_buftype buf_type)
{
        if (isif->formats[ISIF_PAD_SINK].code == MEDIA_BUS_FMT_SGRBG12_1X12)
                isif->isif_cfg.bayer.buf_type = buf_type;
        else
                isif->isif_cfg.ycbcr.buf_type = buf_type;

        return 0;
}

/* configure format in isif hardware */
static int
isif_config_format(struct vpfe_device *vpfe_dev, unsigned int pad)
{
        struct vpfe_isif_device *vpfe_isif = &vpfe_dev->vpfe_isif;
        enum isif_frmfmt frm_fmt = ISIF_FRMFMT_INTERLACED;
        struct v4l2_pix_format format;
        int ret = 0;

        v4l2_fill_pix_format(&format, &vpfe_dev->vpfe_isif.formats[pad]);
        mbus_to_pix(&vpfe_dev->vpfe_isif.formats[pad], &format);

        if (isif_set_pixel_format(vpfe_isif, format.pixelformat) < 0) {
                v4l2_err(&vpfe_dev->v4l2_dev,
                         "Failed to set pixel format in isif\n");
                return -EINVAL;
        }

        /* call for s_crop will override these values */
        vpfe_isif->crop.left = 0;
        vpfe_isif->crop.top = 0;
        vpfe_isif->crop.width = format.width;
        vpfe_isif->crop.height = format.height;

        /* configure the image window */
        isif_set_image_window(vpfe_isif);

        switch (vpfe_dev->vpfe_isif.formats[pad].field) {
        case V4L2_FIELD_INTERLACED:
                /* do nothing, since it is default */
                ret = isif_set_buftype(vpfe_isif, ISIF_BUFTYPE_FLD_INTERLEAVED);
                break;

        case V4L2_FIELD_NONE:
                frm_fmt = ISIF_FRMFMT_PROGRESSIVE;
                /* buffer type only applicable for interlaced scan */
                break;

        case V4L2_FIELD_SEQ_TB:
                ret = isif_set_buftype(vpfe_isif, ISIF_BUFTYPE_FLD_SEPARATED);
                break;

        default:
                return -EINVAL;
        }

        /* set the frame format */
        if (!ret)
                ret = isif_set_frame_format(vpfe_isif, frm_fmt);

        return ret;
}

/*
 * isif_try_format() - Try video format on a pad
 * @isif: VPFE isif device
 * @cfg: V4L2 subdev pad config
 * @fmt: pointer to v4l2 subdev format structure
 */
static void
isif_try_format(struct vpfe_isif_device *isif,
                struct v4l2_subdev_pad_config *cfg,
                struct v4l2_subdev_format *fmt)
{
        unsigned int width = fmt->format.width;
        unsigned int height = fmt->format.height;
        unsigned int i;

        for (i = 0; i < ARRAY_SIZE(isif_fmts); i++) {
                if (fmt->format.code == isif_fmts[i])
                        break;
        }

        /* If not found, use YUYV8_2x8 as default */
        if (i >= ARRAY_SIZE(isif_fmts))
                fmt->format.code = MEDIA_BUS_FMT_YUYV8_2X8;

        /* Clamp the size. */
        fmt->format.width = clamp_t(u32, width, 32, MAX_WIDTH);
        fmt->format.height = clamp_t(u32, height, 32, MAX_HEIGHT);

        /* The data formatter truncates the number of horizontal output
         * pixels to a multiple of 16. To avoid clipping data, allow
         * callers to request an output size bigger than the input size
         * up to the nearest multiple of 16.
         */
        if (fmt->pad == ISIF_PAD_SOURCE)
                fmt->format.width &= ~15;
}

/*
 * vpfe_isif_buffer_isr() - isif module non-progressive buffer scheduling isr
 * @isif: Pointer to isif subdevice.
 */
void vpfe_isif_buffer_isr(struct vpfe_isif_device *isif)
{
        struct vpfe_device *vpfe_dev = to_vpfe_device(isif);
        struct vpfe_video_device *video = &isif->video_out;
        enum v4l2_field field;
        int fid;

        if (!video->started)
                return;

        field = video->fmt.fmt.pix.field;

        if (field == V4L2_FIELD_NONE) {
                /* handle progressive frame capture */
                if (video->cur_frm != video->next_frm)
                        vpfe_video_process_buffer_complete(video);
                return;
        }

        /* interlaced or TB capture check which field we
         * are in hardware
         */
        fid = vpfe_isif_get_fid(vpfe_dev);

        /* switch the software maintained field id */
        video->field_id ^= 1;
        if (fid == video->field_id) {
                /* we are in-sync here,continue */
                if (fid == 0) {
                        /*
                         * One frame is just being captured. If the
                         * next frame is available, release the current
                         * frame and move on
                         */
                        if (video->cur_frm != video->next_frm)
                                vpfe_video_process_buffer_complete(video);
                        /*
                         * based on whether the two fields are stored
                         * interleavely or separately in memory,
                         * reconfigure the ISIF memory address
                         */
                        if (field == V4L2_FIELD_SEQ_TB)
                                vpfe_video_schedule_bottom_field(video);
                        return;
                }
                /*
                 * if one field is just being captured configure
                 * the next frame get the next frame from the
                 * empty queue if no frame is available hold on
                 * to the current buffer
                 */
                spin_lock(&video->dma_queue_lock);
                if (!list_empty(&video->dma_queue) &&
                video->cur_frm == video->next_frm)
                        vpfe_video_schedule_next_buffer(video);
                spin_unlock(&video->dma_queue_lock);
        } else if (fid == 0) {
                /*
                 * out of sync. Recover from any hardware out-of-sync.
                 * May loose one frame
                 */
                video->field_id = fid;
        }
}

/*
 * vpfe_isif_vidint1_isr() - ISIF module progressive buffer scheduling isr
 * @isif: Pointer to isif subdevice.
 */
void vpfe_isif_vidint1_isr(struct vpfe_isif_device *isif)
{
        struct vpfe_video_device *video = &isif->video_out;

        if (!video->started)
                return;

        spin_lock(&video->dma_queue_lock);
        if (video->fmt.fmt.pix.field == V4L2_FIELD_NONE &&
            !list_empty(&video->dma_queue) && video->cur_frm == video->next_frm)
                vpfe_video_schedule_next_buffer(video);

        spin_unlock(&video->dma_queue_lock);
}

/*
 * VPFE video operations
 */

static int isif_video_queue(struct vpfe_device *vpfe_dev, unsigned long addr)
{
        struct vpfe_isif_device *isif = &vpfe_dev->vpfe_isif;

        isif_write(isif->isif_cfg.base_addr, (addr >> 21) &
                ISIF_CADU_BITS, CADU);
        isif_write(isif->isif_cfg.base_addr, (addr >> 5) &
                ISIF_CADL_BITS, CADL);

        return 0;
}

static const struct vpfe_video_operations isif_video_ops = {
        .queue = isif_video_queue,
};

/*
 * V4L2 subdev operations
 */

/* Parameter operations */
static int isif_get_params(struct v4l2_subdev *sd, void *params)
{
        struct vpfe_isif_device *isif = v4l2_get_subdevdata(sd);

        /* only raw module parameters can be set through the IOCTL */
        if (isif->formats[ISIF_PAD_SINK].code != MEDIA_BUS_FMT_SGRBG12_1X12)
                return -EINVAL;
        memcpy(params, &isif->isif_cfg.bayer.config_params,
                        sizeof(isif->isif_cfg.bayer.config_params));
        return 0;
}

static int isif_validate_df_csc_params(struct vpfe_isif_df_csc *df_csc)
{
        struct vpfe_isif_color_space_conv *csc;
        int err = -EINVAL;
        int i;

        if (!df_csc->df_or_csc) {
                /* csc configuration */
                csc = &df_csc->csc;
                if (csc->en) {
                        for (i = 0; i < VPFE_ISIF_CSC_NUM_COEFF; i++)
                                if (csc->coeff[i].integer >
                                    ISIF_CSC_COEF_INTEG_MASK ||
                                    csc->coeff[i].decimal >
                                    ISIF_CSC_COEF_DECIMAL_MASK) {
                                        pr_err("Invalid CSC coefficients\n");
                                        return err;
                                }
                }
        }
        if (df_csc->start_pix > ISIF_DF_CSC_SPH_MASK) {
                pr_err("Invalid df_csc start pix value\n");
                return err;
        }

        if (df_csc->num_pixels > ISIF_DF_NUMPIX) {
                pr_err("Invalid df_csc num pixels value\n");
                return err;
        }

        if (df_csc->start_line > ISIF_DF_CSC_LNH_MASK) {
                pr_err("Invalid df_csc start_line value\n");
                return err;
        }

        if (df_csc->num_lines > ISIF_DF_NUMLINES) {
                pr_err("Invalid df_csc num_lines value\n");
                return err;
        }

        return 0;
}

#define DM365_ISIF_MAX_VDFLSFT          4
#define DM365_ISIF_MAX_VDFSLV           4095
#define DM365_ISIF_MAX_DFCMEM0          0x1fff
#define DM365_ISIF_MAX_DFCMEM1          0x1fff

static int isif_validate_dfc_params(struct vpfe_isif_dfc *dfc)
{
        int err = -EINVAL;
        int i;

        if (!dfc->en)
                return 0;

        if (dfc->corr_whole_line > 1) {
                pr_err("Invalid corr_whole_line value\n");
                return err;
        }

        if (dfc->def_level_shift > DM365_ISIF_MAX_VDFLSFT) {
                pr_err("Invalid def_level_shift value\n");
                return err;
        }

        if (dfc->def_sat_level > DM365_ISIF_MAX_VDFSLV) {
                pr_err("Invalid def_sat_level value\n");
                return err;
        }

        if (!dfc->num_vdefects ||
            dfc->num_vdefects > VPFE_ISIF_VDFC_TABLE_SIZE) {
                pr_err("Invalid num_vdefects value\n");
                return err;
        }

        for (i = 0; i < VPFE_ISIF_VDFC_TABLE_SIZE; i++) {
                if (dfc->table[i].pos_vert > DM365_ISIF_MAX_DFCMEM0) {
                        pr_err("Invalid pos_vert value\n");
                        return err;
                }
                if (dfc->table[i].pos_horz > DM365_ISIF_MAX_DFCMEM1) {
                        pr_err("Invalid pos_horz value\n");
                        return err;
                }
        }

        return 0;
}

#define DM365_ISIF_MAX_CLVRV                    0xfff
#define DM365_ISIF_MAX_CLDC                     0x1fff
#define DM365_ISIF_MAX_CLHSH                    0x1fff
#define DM365_ISIF_MAX_CLHSV                    0x1fff
#define DM365_ISIF_MAX_CLVSH                    0x1fff
#define DM365_ISIF_MAX_CLVSV                    0x1fff
#define DM365_ISIF_MAX_HEIGHT_BLACK_REGION      0x1fff

static int isif_validate_bclamp_params(struct vpfe_isif_black_clamp *bclamp)
{
        int err = -EINVAL;

        if (bclamp->dc_offset > DM365_ISIF_MAX_CLDC) {
                pr_err("Invalid bclamp dc_offset value\n");
                return err;
        }
        if (!bclamp->en)
                return 0;
        if (bclamp->horz.clamp_pix_limit > 1) {
                pr_err("Invalid bclamp horz clamp_pix_limit value\n");
                return err;
        }
        if (bclamp->horz.win_count_calc < 1 ||
                        bclamp->horz.win_count_calc > 32) {
                pr_err("Invalid bclamp horz win_count_calc value\n");
                return err;
        }
        if (bclamp->horz.win_start_h_calc > DM365_ISIF_MAX_CLHSH) {
                pr_err("Invalid bclamp win_start_v_calc value\n");
                return err;
        }

        if (bclamp->horz.win_start_v_calc > DM365_ISIF_MAX_CLHSV) {
                pr_err("Invalid bclamp win_start_v_calc value\n");
                return err;
        }
        if (bclamp->vert.reset_clamp_val > DM365_ISIF_MAX_CLVRV) {
                pr_err("Invalid bclamp reset_clamp_val value\n");
                return err;
        }
        if (bclamp->vert.ob_v_sz_calc > DM365_ISIF_MAX_HEIGHT_BLACK_REGION) {
                pr_err("Invalid bclamp ob_v_sz_calc value\n");
                return err;
        }
        if (bclamp->vert.ob_start_h > DM365_ISIF_MAX_CLVSH) {
                pr_err("Invalid bclamp ob_start_h value\n");
                return err;
        }
        if (bclamp->vert.ob_start_v > DM365_ISIF_MAX_CLVSV) {
                pr_err("Invalid bclamp ob_start_h value\n");
                return err;
        }
        return 0;
}

static int
isif_validate_raw_params(struct vpfe_isif_raw_config *params)
{
        int ret;

        ret = isif_validate_df_csc_params(&params->df_csc);
        if (ret)
                return ret;
        ret = isif_validate_dfc_params(&params->dfc);
        if (ret)
                return ret;
        return isif_validate_bclamp_params(&params->bclamp);
}

static int isif_set_params(struct v4l2_subdev *sd, void *params)
{
        struct vpfe_isif_device *isif = v4l2_get_subdevdata(sd);
        struct vpfe_isif_raw_config isif_raw_params;
        int ret = -EINVAL;

        /* only raw module parameters can be set through the IOCTL */
        if (isif->formats[ISIF_PAD_SINK].code != MEDIA_BUS_FMT_SGRBG12_1X12)
                return ret;

        memcpy(&isif_raw_params, params, sizeof(isif_raw_params));
        if (!isif_validate_raw_params(&isif_raw_params)) {
                memcpy(&isif->isif_cfg.bayer.config_params, &isif_raw_params,
                        sizeof(isif_raw_params));
                ret = 0;
        }
        return ret;
}
/*
 * isif_ioctl() - isif module private ioctl's
 * @sd: VPFE isif V4L2 subdevice
 * @cmd: ioctl command
 * @arg: ioctl argument
 *
 * Return 0 on success or a negative error code otherwise.
 */
static long isif_ioctl(struct v4l2_subdev *sd, unsigned int cmd, void *arg)
{
        switch (cmd) {
        case VIDIOC_VPFE_ISIF_S_RAW_PARAMS:
                return isif_set_params(sd, arg);

        case VIDIOC_VPFE_ISIF_G_RAW_PARAMS:
                return isif_get_params(sd, arg);

        default:
                return -ENOIOCTLCMD;
        }
}

static void isif_config_gain_offset(struct vpfe_isif_device *isif)
{
        struct vpfe_isif_gain_offsets_adj *gain_off_ptr =
                &isif->isif_cfg.bayer.config_params.gain_offset;
        void __iomem *base = isif->isif_cfg.base_addr;
        u32 val;

        val = ((gain_off_ptr->gain_sdram_en & 1) << GAIN_SDRAM_EN_SHIFT) |
              ((gain_off_ptr->gain_ipipe_en & 1) << GAIN_IPIPE_EN_SHIFT) |
              ((gain_off_ptr->gain_h3a_en & 1) << GAIN_H3A_EN_SHIFT) |
              ((gain_off_ptr->offset_sdram_en & 1) << OFST_SDRAM_EN_SHIFT) |
              ((gain_off_ptr->offset_ipipe_en & 1) << OFST_IPIPE_EN_SHIFT) |
              ((gain_off_ptr->offset_h3a_en & 1) << OFST_H3A_EN_SHIFT);
        isif_merge(base, GAIN_OFFSET_EN_MASK, val, CGAMMAWD);

        isif_write(base, isif->isif_cfg.isif_gain_params.cr_gain, CRGAIN);
        isif_write(base, isif->isif_cfg.isif_gain_params.cgr_gain, CGRGAIN);
        isif_write(base, isif->isif_cfg.isif_gain_params.cgb_gain, CGBGAIN);
        isif_write(base, isif->isif_cfg.isif_gain_params.cb_gain, CBGAIN);
        isif_write(base, isif->isif_cfg.isif_gain_params.offset & OFFSET_MASK,
                   COFSTA);

}

static void isif_config_bclamp(struct vpfe_isif_device *isif,
                   struct vpfe_isif_black_clamp *bc)
{
        u32 val;

        /**
         * DC Offset is always added to image data irrespective of bc enable
         * status
         */
        val = bc->dc_offset & ISIF_BC_DCOFFSET_MASK;
        isif_write(isif->isif_cfg.base_addr, val, CLDCOFST);

        if (!bc->en)
                return;

        val = (bc->bc_mode_color & ISIF_BC_MODE_COLOR_MASK) <<
                ISIF_BC_MODE_COLOR_SHIFT;

        /* Enable BC and horizontal clamp calculation paramaters */
        val = val | 1 | ((bc->horz.mode & ISIF_HORZ_BC_MODE_MASK) <<
              ISIF_HORZ_BC_MODE_SHIFT);

        isif_write(isif->isif_cfg.base_addr, val, CLAMPCFG);

        if (bc->horz.mode != VPFE_ISIF_HORZ_BC_DISABLE) {
                /*
                 * Window count for calculation
                 * Base window selection
                 * pixel limit
                 * Horizontal size of window
                 * vertical size of the window
                 * Horizontal start position of the window
                 * Vertical start position of the window
                 */
                val = (bc->horz.win_count_calc & ISIF_HORZ_BC_WIN_COUNT_MASK) |
                      ((bc->horz.base_win_sel_calc & 1) <<
                      ISIF_HORZ_BC_WIN_SEL_SHIFT) |
                      ((bc->horz.clamp_pix_limit & 1) <<
                      ISIF_HORZ_BC_PIX_LIMIT_SHIFT) |
                      ((bc->horz.win_h_sz_calc &
                      ISIF_HORZ_BC_WIN_H_SIZE_MASK) <<
                      ISIF_HORZ_BC_WIN_H_SIZE_SHIFT) |
                      ((bc->horz.win_v_sz_calc &
                      ISIF_HORZ_BC_WIN_V_SIZE_MASK) <<
                      ISIF_HORZ_BC_WIN_V_SIZE_SHIFT);

                isif_write(isif->isif_cfg.base_addr, val, CLHWIN0);

                val = bc->horz.win_start_h_calc & ISIF_HORZ_BC_WIN_START_H_MASK;
                isif_write(isif->isif_cfg.base_addr, val, CLHWIN1);

                val = bc->horz.win_start_v_calc & ISIF_HORZ_BC_WIN_START_V_MASK;
                isif_write(isif->isif_cfg.base_addr, val, CLHWIN2);
        }

        /* vertical clamp calculation paramaters */
        /* OB H Valid */
        val = bc->vert.ob_h_sz_calc & ISIF_VERT_BC_OB_H_SZ_MASK;

        /* Reset clamp value sel for previous line */
        val |= (bc->vert.reset_val_sel & ISIF_VERT_BC_RST_VAL_SEL_MASK) <<
                                ISIF_VERT_BC_RST_VAL_SEL_SHIFT;

        /* Line average coefficient */
        val |= bc->vert.line_ave_coef << ISIF_VERT_BC_LINE_AVE_COEF_SHIFT;
        isif_write(isif->isif_cfg.base_addr, val, CLVWIN0);

        /* Configured reset value */
        if (bc->vert.reset_val_sel == VPFE_ISIF_VERT_BC_USE_CONFIG_CLAMP_VAL) {
                val = bc->vert.reset_clamp_val & ISIF_VERT_BC_RST_VAL_MASK;
                isif_write(isif->isif_cfg.base_addr, val, CLVRV);
        }

        /* Optical Black horizontal start position */
        val = bc->vert.ob_start_h & ISIF_VERT_BC_OB_START_HORZ_MASK;
        isif_write(isif->isif_cfg.base_addr, val, CLVWIN1);

        /* Optical Black vertical start position */
        val = bc->vert.ob_start_v & ISIF_VERT_BC_OB_START_VERT_MASK;
        isif_write(isif->isif_cfg.base_addr, val, CLVWIN2);

        val = bc->vert.ob_v_sz_calc & ISIF_VERT_BC_OB_VERT_SZ_MASK;
        isif_write(isif->isif_cfg.base_addr, val, CLVWIN3);

        /* Vertical start position for BC subtraction */
        val = bc->vert_start_sub & ISIF_BC_VERT_START_SUB_V_MASK;
        isif_write(isif->isif_cfg.base_addr, val, CLSV);
}

/* This function will configure the window size to be capture in ISIF reg */
static void
isif_setwin(struct vpfe_isif_device *isif, struct v4l2_rect *image_win,
            enum isif_frmfmt frm_fmt, int ppc, int mode)
{
        int horz_nr_pixels;
        int vert_nr_lines;
        int horz_start;
        int vert_start;
        int mid_img;

        /*
         * ppc - per pixel count. indicates how many pixels per cell
         * output to SDRAM. example, for ycbcr, it is one y and one c, so 2.
         * raw capture this is 1
         */
        horz_start = image_win->left << (ppc - 1);
        horz_nr_pixels = (image_win->width << (ppc - 1)) - 1;

        /* Writing the horizontal info into the registers */
        isif_write(isif->isif_cfg.base_addr,
                   horz_start & START_PX_HOR_MASK, SPH);
        isif_write(isif->isif_cfg.base_addr,
                   horz_nr_pixels & NUM_PX_HOR_MASK, LNH);
        vert_start = image_win->top;

        if (frm_fmt == ISIF_FRMFMT_INTERLACED) {
                vert_nr_lines = (image_win->height >> 1) - 1;
                vert_start >>= 1;
                /* To account for VD since line 0 doesn't have any data */
                vert_start += 1;
        } else {
                /* To account for VD since line 0 doesn't have any data */
                vert_start += 1;
                vert_nr_lines = image_win->height - 1;
                /* configure VDINT0 and VDINT1 */
                mid_img = vert_start + (image_win->height / 2);
                isif_write(isif->isif_cfg.base_addr, mid_img, VDINT1);
        }

        if (!mode)
                isif_write(isif->isif_cfg.base_addr, 0, VDINT0);
        else
                isif_write(isif->isif_cfg.base_addr, vert_nr_lines, VDINT0);
        isif_write(isif->isif_cfg.base_addr,
                   vert_start & START_VER_ONE_MASK, SLV0);
        isif_write(isif->isif_cfg.base_addr,
                   vert_start & START_VER_TWO_MASK, SLV1);
        isif_write(isif->isif_cfg.base_addr,
                   vert_nr_lines & NUM_LINES_VER, LNV);
}

#define DM365_ISIF_DFCMWR_MEMORY_WRITE          1
#define DM365_ISIF_DFCMRD_MEMORY_READ           0x2

static void
isif_config_dfc(struct vpfe_isif_device *isif, struct vpfe_isif_dfc *vdfc)
{
#define DFC_WRITE_WAIT_COUNT    1000
        u32 count = DFC_WRITE_WAIT_COUNT;
        u32 val;
        int i;

        if (!vdfc->en)
                return;

        /* Correction mode */
        val = (vdfc->corr_mode & ISIF_VDFC_CORR_MOD_MASK) <<
               ISIF_VDFC_CORR_MOD_SHIFT;

        /* Correct whole line or partial */
        if (vdfc->corr_whole_line)
                val |= 1 << ISIF_VDFC_CORR_WHOLE_LN_SHIFT;

        /* level shift value */
        val |= (vdfc->def_level_shift & ISIF_VDFC_LEVEL_SHFT_MASK) <<
                ISIF_VDFC_LEVEL_SHFT_SHIFT;

        isif_write(isif->isif_cfg.base_addr, val, DFCCTL);

        /* Defect saturation level */
        val = vdfc->def_sat_level & ISIF_VDFC_SAT_LEVEL_MASK;
        isif_write(isif->isif_cfg.base_addr, val, VDFSATLV);

        isif_write(isif->isif_cfg.base_addr, vdfc->table[0].pos_vert &
                   ISIF_VDFC_POS_MASK, DFCMEM0);
        isif_write(isif->isif_cfg.base_addr, vdfc->table[0].pos_horz &
                   ISIF_VDFC_POS_MASK, DFCMEM1);
        if (vdfc->corr_mode == VPFE_ISIF_VDFC_NORMAL ||
            vdfc->corr_mode == VPFE_ISIF_VDFC_HORZ_INTERPOL_IF_SAT) {
                isif_write(isif->isif_cfg.base_addr,
                           vdfc->table[0].level_at_pos, DFCMEM2);
                isif_write(isif->isif_cfg.base_addr,
                           vdfc->table[0].level_up_pixels, DFCMEM3);
                isif_write(isif->isif_cfg.base_addr,
                           vdfc->table[0].level_low_pixels, DFCMEM4);
        }

        val = isif_read(isif->isif_cfg.base_addr, DFCMEMCTL);
        /* set DFCMARST and set DFCMWR */
        val |= 1 << ISIF_DFCMEMCTL_DFCMARST_SHIFT;
        val |= 1;
        isif_write(isif->isif_cfg.base_addr, val, DFCMEMCTL);

        while (count && (isif_read(isif->isif_cfg.base_addr, DFCMEMCTL) & 0x01))
                count--;

        val = isif_read(isif->isif_cfg.base_addr, DFCMEMCTL);
        if (!count) {
                pr_debug("defect table write timeout !!\n");
                return;
        }

        for (i = 1; i < vdfc->num_vdefects; i++) {
                isif_write(isif->isif_cfg.base_addr, vdfc->table[i].pos_vert &
                        ISIF_VDFC_POS_MASK, DFCMEM0);

                isif_write(isif->isif_cfg.base_addr, vdfc->table[i].pos_horz &
                        ISIF_VDFC_POS_MASK, DFCMEM1);

                if (vdfc->corr_mode == VPFE_ISIF_VDFC_NORMAL ||
                    vdfc->corr_mode == VPFE_ISIF_VDFC_HORZ_INTERPOL_IF_SAT) {
                        isif_write(isif->isif_cfg.base_addr,
                                   vdfc->table[i].level_at_pos, DFCMEM2);
                        isif_write(isif->isif_cfg.base_addr,
                                   vdfc->table[i].level_up_pixels, DFCMEM3);
                        isif_write(isif->isif_cfg.base_addr,
                                   vdfc->table[i].level_low_pixels, DFCMEM4);
                }
                val = isif_read(isif->isif_cfg.base_addr, DFCMEMCTL);
                /* clear DFCMARST and set DFCMWR */
                val &= ~(1 << ISIF_DFCMEMCTL_DFCMARST_SHIFT);
                val |= 1;
                isif_write(isif->isif_cfg.base_addr, val, DFCMEMCTL);

                count = DFC_WRITE_WAIT_COUNT;
                while (count && (isif_read(isif->isif_cfg.base_addr,
                        DFCMEMCTL) & 0x01))
                        count--;

                val = isif_read(isif->isif_cfg.base_addr, DFCMEMCTL);
                if (!count) {
                        pr_debug("defect table write timeout !!\n");
                        return;
                }
        }
        if (vdfc->num_vdefects < VPFE_ISIF_VDFC_TABLE_SIZE) {
                /* Extra cycle needed */
                isif_write(isif->isif_cfg.base_addr, 0, DFCMEM0);
                isif_write(isif->isif_cfg.base_addr,
                           DM365_ISIF_MAX_DFCMEM1, DFCMEM1);
                isif_write(isif->isif_cfg.base_addr,
                           DM365_ISIF_DFCMWR_MEMORY_WRITE, DFCMEMCTL);
        }
        /* enable VDFC */
        isif_merge(isif->isif_cfg.base_addr, (1 << ISIF_VDFC_EN_SHIFT),
                   (1 << ISIF_VDFC_EN_SHIFT), DFCCTL);

        isif_merge(isif->isif_cfg.base_addr, (1 << ISIF_VDFC_EN_SHIFT),
                   (0 << ISIF_VDFC_EN_SHIFT), DFCCTL);

        isif_write(isif->isif_cfg.base_addr, 0x6, DFCMEMCTL);
        for (i = 0; i < vdfc->num_vdefects; i++) {
                count = DFC_WRITE_WAIT_COUNT;
                while (count &&
                        (isif_read(isif->isif_cfg.base_addr, DFCMEMCTL) & 0x2))
                        count--;
                val = isif_read(isif->isif_cfg.base_addr, DFCMEMCTL);
                if (!count) {
                        pr_debug("defect table write timeout !!\n");
                        return;
                }
                isif_write(isif->isif_cfg.base_addr,
                           DM365_ISIF_DFCMRD_MEMORY_READ, DFCMEMCTL);
        }
}

static void
isif_config_csc(struct vpfe_isif_device *isif, struct vpfe_isif_df_csc *df_csc)
{
        u32 val1;
        u32 val2;
        u32 i;

        if (!df_csc->csc.en) {
                isif_write(isif->isif_cfg.base_addr, 0, CSCCTL);
                return;
        }
        /* initialize all bits to 0 */
        val1 = 0;
        for (i = 0; i < VPFE_ISIF_CSC_NUM_COEFF; i++) {
                if ((i % 2) == 0) {
                        /* CSCM - LSB */
                        val1 = ((df_csc->csc.coeff[i].integer &
                                ISIF_CSC_COEF_INTEG_MASK) <<
                                ISIF_CSC_COEF_INTEG_SHIFT) |
                                ((df_csc->csc.coeff[i].decimal &
                                ISIF_CSC_COEF_DECIMAL_MASK));
                } else {

                        /* CSCM - MSB */
                        val2 = ((df_csc->csc.coeff[i].integer &
                                ISIF_CSC_COEF_INTEG_MASK) <<
                                ISIF_CSC_COEF_INTEG_SHIFT) |
                                ((df_csc->csc.coeff[i].decimal &
                                ISIF_CSC_COEF_DECIMAL_MASK));
                        val2 <<= ISIF_CSCM_MSB_SHIFT;
                        val2 |= val1;
                        isif_write(isif->isif_cfg.base_addr, val2,
                                   (CSCM0 + ((i-1) << 1)));
                }
        }
        /* program the active area */
        isif_write(isif->isif_cfg.base_addr, df_csc->start_pix &
                ISIF_DF_CSC_SPH_MASK, FMTSPH);
        /*
         * one extra pixel as required for CSC. Actually number of
         * pixel - 1 should be configured in this register. So we
         * need to subtract 1 before writing to FMTSPH, but we will
         * not do this since csc requires one extra pixel
         */
        isif_write(isif->isif_cfg.base_addr, df_csc->num_pixels &
                ISIF_DF_CSC_SPH_MASK, FMTLNH);
        isif_write(isif->isif_cfg.base_addr, df_csc->start_line &
                ISIF_DF_CSC_SPH_MASK, FMTSLV);
        /*
         * one extra line as required for CSC. See reason documented for
         * num_pixels
         */
        isif_write(isif->isif_cfg.base_addr, df_csc->num_lines &
                ISIF_DF_CSC_SPH_MASK, FMTLNV);
        /* Enable CSC */
        isif_write(isif->isif_cfg.base_addr, 1, CSCCTL);
}

static void
isif_config_linearization(struct vpfe_isif_device *isif,
                          struct vpfe_isif_linearize *linearize)
{
        u32 val;
        u32 i;

        if (!linearize->en) {
                isif_write(isif->isif_cfg.base_addr, 0, LINCFG0);
                return;
        }
        /* shift value for correction */
        val = (linearize->corr_shft & ISIF_LIN_CORRSFT_MASK) <<
              ISIF_LIN_CORRSFT_SHIFT;

        /* enable */
        val |= 1;
        isif_write(isif->isif_cfg.base_addr, val, LINCFG0);
        /* Scale factor */
        val = (linearize->scale_fact.integer & 1) <<
              ISIF_LIN_SCALE_FACT_INTEG_SHIFT;
        val |= linearize->scale_fact.decimal & ISIF_LIN_SCALE_FACT_DECIMAL_MASK;
        isif_write(isif->isif_cfg.base_addr, val, LINCFG1);

        for (i = 0; i < VPFE_ISIF_LINEAR_TAB_SIZE; i++) {
                val = linearize->table[i] & ISIF_LIN_ENTRY_MASK;
                if (i%2)
                        isif_regw_lin_tbl(isif, val, ((i >> 1) << 2), 1);
                else
                        isif_regw_lin_tbl(isif, val, ((i >> 1) << 2), 0);
        }
}

static void
isif_config_culling(struct vpfe_isif_device *isif, struct vpfe_isif_cul *cul)
{
        u32 val;

        /* Horizontal pattern */
        val = cul->hcpat_even << CULL_PAT_EVEN_LINE_SHIFT;
        val |= cul->hcpat_odd;
        isif_write(isif->isif_cfg.base_addr, val, CULH);
        /* vertical pattern */
        isif_write(isif->isif_cfg.base_addr, cul->vcpat, CULV);
        /* LPF */
        isif_merge(isif->isif_cfg.base_addr, ISIF_LPF_MASK << ISIF_LPF_SHIFT,
                   cul->en_lpf << ISIF_LPF_SHIFT, MODESET);
}

static int isif_get_pix_fmt(u32 mbus_code)
{
        switch (mbus_code) {
        case MEDIA_BUS_FMT_SGRBG10_ALAW8_1X8:
        case MEDIA_BUS_FMT_SGRBG10_DPCM8_1X8:
        case MEDIA_BUS_FMT_SGRBG12_1X12:
                return ISIF_PIXFMT_RAW;

        case MEDIA_BUS_FMT_YUYV8_2X8:
        case MEDIA_BUS_FMT_UYVY8_2X8:
        case MEDIA_BUS_FMT_YUYV10_2X10:
        case MEDIA_BUS_FMT_Y8_1X8:
                return ISIF_PIXFMT_YCBCR_8BIT;

        case MEDIA_BUS_FMT_YUYV8_1X16:
        case MEDIA_BUS_FMT_YUYV10_1X20:
                return ISIF_PIXFMT_YCBCR_16BIT;

        default:
                break;
        }
        return -EINVAL;
}

#define ISIF_INTERLACE_INVERSE_MODE             0x4b6d
#define ISIF_INTERLACE_NON_INVERSE_MODE         0x0b6d
#define ISIF_PROGRESSIVE_INVERSE_MODE           0x4000
#define ISIF_PROGRESSIVE_NON_INVERSE_MODE       0x0000

static int isif_config_raw(struct v4l2_subdev *sd, int mode)
{
        struct vpfe_isif_device *isif = v4l2_get_subdevdata(sd);
        struct isif_params_raw *params = &isif->isif_cfg.bayer;
        struct vpfe_isif_raw_config *module_params =
                                &isif->isif_cfg.bayer.config_params;
        struct v4l2_mbus_framefmt *format;
        int pix_fmt;
        u32 val;

        format = &isif->formats[ISIF_PAD_SINK];

        /* In case of user has set BT656IF earlier, it should be reset
         * when configuring for raw input.
         */
        isif_write(isif->isif_cfg.base_addr, 0, REC656IF);
        /* Configure CCDCFG register
         * Set CCD Not to swap input since input is RAW data
         * Set FID detection function to Latch at V-Sync
         * Set WENLOG - isif valid area
         * Set TRGSEL
         * Set EXTRG
         * Packed to 8 or 16 bits
         */
        val = ISIF_YCINSWP_RAW | ISIF_CCDCFG_FIDMD_LATCH_VSYNC |
              ISIF_CCDCFG_WENLOG_AND | ISIF_CCDCFG_TRGSEL_WEN |
              ISIF_CCDCFG_EXTRG_DISABLE | (isif->isif_cfg.data_pack &
              ISIF_DATA_PACK_MASK);
        isif_write(isif->isif_cfg.base_addr, val, CCDCFG);

        pix_fmt = isif_get_pix_fmt(format->code);
        if (pix_fmt < 0) {
                pr_debug("Invalid pix_fmt(input mode)\n");
                return -EINVAL;
        }
        /*
         * Configure the vertical sync polarity(MODESET.VDPOL)
         * Configure the horizontal sync polarity (MODESET.HDPOL)
         * Configure frame id polarity (MODESET.FLDPOL)
         * Configure data polarity
         * Configure External WEN Selection
         * Configure frame format(progressive or interlace)
         * Configure pixel format (Input mode)
         * Configure the data shift
         */
        val = ISIF_VDHDOUT_INPUT | ((params->vd_pol & ISIF_VD_POL_MASK) <<
              ISIF_VD_POL_SHIFT) | ((params->hd_pol & ISIF_HD_POL_MASK) <<
              ISIF_HD_POL_SHIFT) | ((params->fid_pol & ISIF_FID_POL_MASK) <<
              ISIF_FID_POL_SHIFT) | ((ISIF_DATAPOL_NORMAL &
              ISIF_DATAPOL_MASK) << ISIF_DATAPOL_SHIFT) | ((ISIF_EXWEN_DISABLE &
              ISIF_EXWEN_MASK) << ISIF_EXWEN_SHIFT) | ((params->frm_fmt &
              ISIF_FRM_FMT_MASK) << ISIF_FRM_FMT_SHIFT) | ((pix_fmt &
              ISIF_INPUT_MASK) << ISIF_INPUT_SHIFT);

        /* currently only MEDIA_BUS_FMT_SGRBG12_1X12 is
         * supported. shift appropriately depending on
         * different MBUS fmt's added
         */
        if (format->code == MEDIA_BUS_FMT_SGRBG12_1X12)
                val |= ((VPFE_ISIF_NO_SHIFT &
                        ISIF_DATASFT_MASK) << ISIF_DATASFT_SHIFT);

        isif_write(isif->isif_cfg.base_addr, val, MODESET);
        /*
         * Configure GAMMAWD register
         * CFA pattern setting
         */
        val = (params->cfa_pat & ISIF_GAMMAWD_CFA_MASK) <<
                ISIF_GAMMAWD_CFA_SHIFT;
        /* Gamma msb */
        if (params->v4l2_pix_fmt == V4L2_PIX_FMT_SGRBG10ALAW8)
                val = val | ISIF_ALAW_ENABLE;

        val = val | ((params->data_msb & ISIF_ALAW_GAMA_WD_MASK) <<
                        ISIF_ALAW_GAMA_WD_SHIFT);

        isif_write(isif->isif_cfg.base_addr, val, CGAMMAWD);
        /* Configure DPCM compression settings */
        if (params->v4l2_pix_fmt == V4L2_PIX_FMT_SGRBG10DPCM8) {
                val =  1 << ISIF_DPCM_EN_SHIFT;
                val |= (params->dpcm_predictor &
                        ISIF_DPCM_PREDICTOR_MASK) << ISIF_DPCM_PREDICTOR_SHIFT;
        }
        isif_write(isif->isif_cfg.base_addr, val, MISC);
        /* Configure Gain & Offset */
        isif_config_gain_offset(isif);
        /* Configure Color pattern */
        if (format->code == MEDIA_BUS_FMT_SGRBG12_1X12)
                val = isif_sgrbg_pattern;
        else
                /* default set to rggb */
                val = isif_srggb_pattern;

        isif_write(isif->isif_cfg.base_addr, val, CCOLP);

        /* Configure HSIZE register  */
        val = (params->horz_flip_en & ISIF_HSIZE_FLIP_MASK) <<
              ISIF_HSIZE_FLIP_SHIFT;

        /* calculate line offset in 32 bytes based on pack value */
        if (isif->isif_cfg.data_pack == ISIF_PACK_8BIT)
                val |= ((params->win.width + 31) >> 5) & ISIF_LINEOFST_MASK;
        else if (isif->isif_cfg.data_pack == ISIF_PACK_12BIT)
                val |= ((((params->win.width + (params->win.width >> 2)) +
                        31) >> 5) & ISIF_LINEOFST_MASK);
        else
                val |= (((params->win.width * 2) + 31) >> 5) &
                        ISIF_LINEOFST_MASK;
        isif_write(isif->isif_cfg.base_addr, val, HSIZE);
        /* Configure SDOFST register  */
        if (params->frm_fmt == ISIF_FRMFMT_INTERLACED) {
                if (params->image_invert_en)
                        /* For interlace inverse mode */
                        isif_write(isif->isif_cfg.base_addr,
                                   ISIF_INTERLACE_INVERSE_MODE, SDOFST);
                else
                        /* For interlace non inverse mode */
                        isif_write(isif->isif_cfg.base_addr,
                                   ISIF_INTERLACE_NON_INVERSE_MODE, SDOFST);
        } else if (params->frm_fmt == ISIF_FRMFMT_PROGRESSIVE) {
                if (params->image_invert_en)
                        isif_write(isif->isif_cfg.base_addr,
                                   ISIF_PROGRESSIVE_INVERSE_MODE, SDOFST);
                else
                        /* For progessive non inverse mode */
                        isif_write(isif->isif_cfg.base_addr,
                                   ISIF_PROGRESSIVE_NON_INVERSE_MODE, SDOFST);
        }
        /* Configure video window */
        isif_setwin(isif, &params->win, params->frm_fmt, 1, mode);
        /* Configure Black Clamp */
        isif_config_bclamp(isif, &module_params->bclamp);
        /* Configure Vertical Defection Pixel Correction */
        isif_config_dfc(isif, &module_params->dfc);
        if (!module_params->df_csc.df_or_csc)
                /* Configure Color Space Conversion */
                isif_config_csc(isif, &module_params->df_csc);

        isif_config_linearization(isif, &module_params->linearize);
        /* Configure Culling */
        isif_config_culling(isif, &module_params->culling);
        /* Configure Horizontal and vertical offsets(DFC,LSC,Gain) */
        val = module_params->horz_offset & ISIF_DATA_H_OFFSET_MASK;
        isif_write(isif->isif_cfg.base_addr, val, DATAHOFST);

        val = module_params->vert_offset & ISIF_DATA_V_OFFSET_MASK;
        isif_write(isif->isif_cfg.base_addr, val, DATAVOFST);

        return 0;
}

#define DM365_ISIF_HSIZE_MASK           0xffffffe0
#define DM365_ISIF_SDOFST_2_LINES       0x00000249

/* This function will configure ISIF for YCbCr parameters. */
static int isif_config_ycbcr(struct v4l2_subdev *sd, int mode)
{
        struct vpfe_isif_device *isif = v4l2_get_subdevdata(sd);
        struct isif_ycbcr_config *params = &isif->isif_cfg.ycbcr;
        struct v4l2_mbus_framefmt *format;
        int pix_fmt;
        u32 modeset;
        u32 ccdcfg;

        format = &isif->formats[ISIF_PAD_SINK];
        /*
         * first reset the ISIF
         * all registers have default values after reset
         * This is important since we assume default values to be set in
         * a lot of registers that we didn't touch
         */
        /* start with all bits zero */
        ccdcfg = 0;
        modeset = 0;
        pix_fmt = isif_get_pix_fmt(format->code);
        if (pix_fmt < 0) {
                pr_debug("Invalid pix_fmt(input mode)\n");
                return -EINVAL;
        }
        /* configure pixel format or input mode */
        modeset = modeset | ((pix_fmt & ISIF_INPUT_MASK) <<
                  ISIF_INPUT_SHIFT) | ((params->frm_fmt & ISIF_FRM_FMT_MASK) <<
                  ISIF_FRM_FMT_SHIFT) | (((params->fid_pol &
                  ISIF_FID_POL_MASK) << ISIF_FID_POL_SHIFT)) |
                  (((params->hd_pol & ISIF_HD_POL_MASK) << ISIF_HD_POL_SHIFT)) |
                  (((params->vd_pol & ISIF_VD_POL_MASK) << ISIF_VD_POL_SHIFT));
        /* pack the data to 8-bit CCDCCFG */
        switch (format->code) {
        case MEDIA_BUS_FMT_YUYV8_2X8:
        case MEDIA_BUS_FMT_UYVY8_2X8:
                if (pix_fmt != ISIF_PIXFMT_YCBCR_8BIT) {
                        pr_debug("Invalid pix_fmt(input mode)\n");
                        return -EINVAL;
                }
                modeset |= ((VPFE_PINPOL_NEGATIVE & ISIF_VD_POL_MASK) <<
                                ISIF_VD_POL_SHIFT);
                isif_write(isif->isif_cfg.base_addr, 3, REC656IF);
                ccdcfg = ccdcfg | ISIF_PACK_8BIT | ISIF_YCINSWP_YCBCR;
                break;

        case MEDIA_BUS_FMT_YUYV10_2X10:
                if (pix_fmt != ISIF_PIXFMT_YCBCR_8BIT) {
                        pr_debug("Invalid pix_fmt(input mode)\n");
                        return -EINVAL;
                }
                /* setup BT.656, embedded sync  */
                isif_write(isif->isif_cfg.base_addr, 3, REC656IF);
                /* enable 10 bit mode in ccdcfg */
                ccdcfg = ccdcfg | ISIF_PACK_8BIT | ISIF_YCINSWP_YCBCR |
                        ISIF_BW656_ENABLE;
                break;

        case MEDIA_BUS_FMT_YUYV10_1X20:
                if (pix_fmt != ISIF_PIXFMT_YCBCR_16BIT) {
                        pr_debug("Invalid pix_fmt(input mode)\n");
                        return -EINVAL;
                }
                isif_write(isif->isif_cfg.base_addr, 3, REC656IF);
                break;

        case MEDIA_BUS_FMT_Y8_1X8:
                ccdcfg |= ISIF_PACK_8BIT;
                ccdcfg |= ISIF_YCINSWP_YCBCR;
                if (pix_fmt != ISIF_PIXFMT_YCBCR_8BIT) {
                        pr_debug("Invalid pix_fmt(input mode)\n");
                        return -EINVAL;
                }
                break;

        case MEDIA_BUS_FMT_YUYV8_1X16:
                if (pix_fmt != ISIF_PIXFMT_YCBCR_16BIT) {
                        pr_debug("Invalid pix_fmt(input mode)\n");
                        return -EINVAL;
                }
                break;

        default:
                /* should never come here */
                pr_debug("Invalid interface type\n");
                return -EINVAL;
        }
        isif_write(isif->isif_cfg.base_addr, modeset, MODESET);
        /* Set up pix order */
        ccdcfg |= (params->pix_order & ISIF_PIX_ORDER_MASK) <<
                ISIF_PIX_ORDER_SHIFT;
        isif_write(isif->isif_cfg.base_addr, ccdcfg, CCDCFG);
        /* configure video window */
        if (format->code == MEDIA_BUS_FMT_YUYV10_1X20 ||
                        format->code == MEDIA_BUS_FMT_YUYV8_1X16)
                isif_setwin(isif, &params->win, params->frm_fmt, 1, mode);
        else
                isif_setwin(isif, &params->win, params->frm_fmt, 2, mode);

        /*
         * configure the horizontal line offset
         * this is done by rounding up width to a multiple of 16 pixels
         * and multiply by two to account for y:cb:cr 4:2:2 data
         */
        isif_write(isif->isif_cfg.base_addr,
                   ((((params->win.width * 2) + 31) &
                   DM365_ISIF_HSIZE_MASK) >> 5), HSIZE);

        /* configure the memory line offset */
        if (params->frm_fmt == ISIF_FRMFMT_INTERLACED &&
            params->buf_type == ISIF_BUFTYPE_FLD_INTERLEAVED)
                /* two fields are interleaved in memory */
                isif_write(isif->isif_cfg.base_addr,
                           DM365_ISIF_SDOFST_2_LINES, SDOFST);
        return 0;
}

static int isif_configure(struct v4l2_subdev *sd, int mode)
{
        struct vpfe_isif_device *isif = v4l2_get_subdevdata(sd);
        struct v4l2_mbus_framefmt *format;

        format = &isif->formats[ISIF_PAD_SINK];

        switch (format->code) {
        case MEDIA_BUS_FMT_SGRBG10_ALAW8_1X8:
        case MEDIA_BUS_FMT_SGRBG10_DPCM8_1X8:
        case MEDIA_BUS_FMT_SGRBG12_1X12:
                return isif_config_raw(sd, mode);

        case MEDIA_BUS_FMT_YUYV8_2X8:
        case MEDIA_BUS_FMT_UYVY8_2X8:
        case MEDIA_BUS_FMT_YUYV10_2X10:
        case MEDIA_BUS_FMT_Y8_1X8:
        case MEDIA_BUS_FMT_YUYV8_1X16:
        case MEDIA_BUS_FMT_YUYV10_1X20:
                return isif_config_ycbcr(sd, mode);

        default:
                break;
        }
        return -EINVAL;
}

/*
 * isif_set_stream() - Enable/Disable streaming on the ISIF module
 * @sd: VPFE ISIF V4L2 subdevice
 * @enable: Enable/disable stream
 */
static int isif_set_stream(struct v4l2_subdev *sd, int enable)
{
        struct vpfe_isif_device *isif = v4l2_get_subdevdata(sd);
        int ret;

        if (enable) {
                ret = isif_configure(sd,
                        (isif->output == ISIF_OUTPUT_MEMORY) ? 0 : 1);
                if (ret)
                        return ret;
                if (isif->output == ISIF_OUTPUT_MEMORY)
                        isif_enable_output_to_sdram(isif, 1);
                isif_enable(isif, 1);
        } else {
                isif_enable(isif, 0);
                isif_enable_output_to_sdram(isif, 0);
        }

        return 0;
}

/*
 * __isif_get_format() - helper function for getting isif format
 * @isif: pointer to isif private structure.
 * @pad: pad number.
 * @cfg: V4L2 subdev pad config
 * @which: wanted subdev format.
 */
static struct v4l2_mbus_framefmt *
__isif_get_format(struct vpfe_isif_device *isif,
                  struct v4l2_subdev_pad_config *cfg, unsigned int pad,
                  enum v4l2_subdev_format_whence which)
{
        if (which == V4L2_SUBDEV_FORMAT_TRY) {
                struct v4l2_subdev_format fmt;

                fmt.pad = pad;
                fmt.which = which;

                return v4l2_subdev_get_try_format(&isif->subdev, cfg, pad);
        }
        return &isif->formats[pad];
}

/*
 * isif_set_format() - set format on pad
 * @sd    : VPFE ISIF device
 * @cfg   : V4L2 subdev pad config
 * @fmt   : pointer to v4l2 subdev format structure
 *
 * Return 0 on success or -EINVAL if format or pad is invalid
 */
static int
isif_set_format(struct v4l2_subdev *sd, struct v4l2_subdev_pad_config *cfg,
                struct v4l2_subdev_format *fmt)
{
        struct vpfe_isif_device *isif = v4l2_get_subdevdata(sd);
        struct vpfe_device *vpfe_dev = to_vpfe_device(isif);
        struct v4l2_mbus_framefmt *format;

        format = __isif_get_format(isif, cfg, fmt->pad, fmt->which);
        if (format == NULL)
                return -EINVAL;

        isif_try_format(isif, cfg, fmt);
        memcpy(format, &fmt->format, sizeof(*format));

        if (fmt->which == V4L2_SUBDEV_FORMAT_TRY)
                return 0;

        if (fmt->pad == ISIF_PAD_SOURCE)
                return isif_config_format(vpfe_dev, fmt->pad);

        return 0;
}

/*
 * isif_get_format() - Retrieve the video format on a pad
 * @sd: VPFE ISIF V4L2 subdevice
 * @cfg: V4L2 subdev pad config
 * @fmt: pointer to v4l2 subdev format structure
 *
 * Return 0 on success or -EINVAL if the pad is invalid or doesn't correspond
 * to the format type.
 */
static int
isif_get_format(struct v4l2_subdev *sd, struct v4l2_subdev_pad_config *cfg,
                struct v4l2_subdev_format *fmt)
{
        struct vpfe_isif_device *vpfe_isif = v4l2_get_subdevdata(sd);
        struct v4l2_mbus_framefmt *format;

        format = __isif_get_format(vpfe_isif, cfg, fmt->pad, fmt->which);
        if (format == NULL)
                return -EINVAL;

        memcpy(&fmt->format, format, sizeof(fmt->format));

        return 0;
}

/*
 * isif_enum_frame_size() - enum frame sizes on pads
 * @sd: VPFE isif V4L2 subdevice
 * @cfg: V4L2 subdev pad config
 * @code: pointer to v4l2_subdev_frame_size_enum structure
 */
static int
isif_enum_frame_size(struct v4l2_subdev *sd, struct v4l2_subdev_pad_config *cfg,
                     struct v4l2_subdev_frame_size_enum *fse)
{
        struct vpfe_isif_device *isif = v4l2_get_subdevdata(sd);
        struct v4l2_subdev_format format;

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

        format.pad = fse->pad;
        format.format.code = fse->code;
        format.format.width = 1;
        format.format.height = 1;
        format.which = fse->which;
        isif_try_format(isif, cfg, &format);
        fse->min_width = format.format.width;
        fse->min_height = format.format.height;

        if (format.format.code != fse->code)
                return -EINVAL;

        format.pad = fse->pad;
        format.format.code = fse->code;
        format.format.width = -1;
        format.format.height = -1;
        format.which = fse->which;
        isif_try_format(isif, cfg, &format);
        fse->max_width = format.format.width;
        fse->max_height = format.format.height;

        return 0;
}

/*
 * isif_enum_mbus_code() - enum mbus codes for pads
 * @sd: VPFE isif V4L2 subdevice
 * @cfg: V4L2 subdev pad config
 * @code: pointer to v4l2_subdev_mbus_code_enum structure
 */
static int
isif_enum_mbus_code(struct v4l2_subdev *sd, struct v4l2_subdev_pad_config *cfg,
                    struct v4l2_subdev_mbus_code_enum *code)
{
        switch (code->pad) {
        case ISIF_PAD_SINK:
        case ISIF_PAD_SOURCE:
                if (code->index >= ARRAY_SIZE(isif_fmts))
                        return -EINVAL;
                code->code = isif_fmts[code->index];
                break;

        default:
                return -EINVAL;
        }

        return 0;
}

/*
 * isif_pad_set_selection() - set crop rectangle on pad
 * @sd: VPFE isif V4L2 subdevice
 * @cfg: V4L2 subdev pad config
 * @code: pointer to v4l2_subdev_mbus_code_enum structure
 *
 * Return 0 on success, -EINVAL if pad is invalid
 */
static int
isif_pad_set_selection(struct v4l2_subdev *sd,
                       struct v4l2_subdev_pad_config *cfg,
                       struct v4l2_subdev_selection *sel)
{
        struct vpfe_isif_device *vpfe_isif = v4l2_get_subdevdata(sd);
        struct v4l2_mbus_framefmt *format;

        /* check whether it's a valid pad and target */
        if (sel->pad != ISIF_PAD_SINK || sel->target != V4L2_SEL_TGT_CROP)
                return -EINVAL;

        format = __isif_get_format(vpfe_isif, cfg, sel->pad, sel->which);
        if (format == NULL)
                return -EINVAL;

        /* check wether crop rect is within limits */
        if (sel->r.top < 0 || sel->r.left < 0 ||
                (sel->r.left + sel->r.width >
                vpfe_isif->formats[ISIF_PAD_SINK].width) ||
                (sel->r.top + sel->r.height >
                        vpfe_isif->formats[ISIF_PAD_SINK].height)) {
                sel->r.left = 0;
                sel->r.top = 0;
                sel->r.width = format->width;
                sel->r.height = format->height;
        }
        /* adjust the width to 16 pixel boundary */
        sel->r.width = (sel->r.width + 15) & ~0xf;
        vpfe_isif->crop = sel->r;
        if (sel->which == V4L2_SUBDEV_FORMAT_ACTIVE) {
                isif_set_image_window(vpfe_isif);
        } else {
                struct v4l2_rect *rect;

                rect = v4l2_subdev_get_try_crop(sd, cfg, ISIF_PAD_SINK);
                memcpy(rect, &vpfe_isif->crop, sizeof(*rect));
        }
        return 0;
}

/*
 * isif_pad_get_selection() - get crop rectangle on pad
 * @sd: VPFE isif V4L2 subdevice
 * @cfg: V4L2 subdev pad config
 * @code: pointer to v4l2_subdev_mbus_code_enum structure
 *
 * Return 0 on success, -EINVAL if pad is invalid
 */
static int
isif_pad_get_selection(struct v4l2_subdev *sd,
                       struct v4l2_subdev_pad_config *cfg,
                       struct v4l2_subdev_selection *sel)
{
        struct vpfe_isif_device *vpfe_isif = v4l2_get_subdevdata(sd);

        /* check whether it's a valid pad and target */
        if (sel->pad != ISIF_PAD_SINK || sel->target != V4L2_SEL_TGT_CROP)
                return -EINVAL;

        if (sel->which == V4L2_SUBDEV_FORMAT_TRY) {
                struct v4l2_rect *rect;

                rect = v4l2_subdev_get_try_crop(sd, cfg, ISIF_PAD_SINK);
                memcpy(&sel->r, rect, sizeof(*rect));
        } else {
                sel->r = vpfe_isif->crop;
        }

        return 0;
}

/*
 * isif_init_formats() - Initialize formats on all pads
 * @sd: VPFE isif V4L2 subdevice
 * @fh: V4L2 subdev file handle
 *
 * Initialize all pad formats with default values. Try formats are initialized
 * on the file handle.
 */
static int
isif_init_formats(struct v4l2_subdev *sd,
                  struct v4l2_subdev_fh *fh)
{
        struct v4l2_subdev_format format;
        struct v4l2_subdev_selection sel;

        memset(&format, 0, sizeof(format));
        format.pad = ISIF_PAD_SINK;
        format.which = V4L2_SUBDEV_FORMAT_TRY;
        format.format.code = MEDIA_BUS_FMT_SGRBG12_1X12;
        format.format.width = MAX_WIDTH;
        format.format.height = MAX_HEIGHT;
        isif_set_format(sd, fh->pad, &format);

        memset(&format, 0, sizeof(format));
        format.pad = ISIF_PAD_SOURCE;
        format.which = V4L2_SUBDEV_FORMAT_TRY;
        format.format.code = MEDIA_BUS_FMT_SGRBG12_1X12;
        format.format.width = MAX_WIDTH;
        format.format.height = MAX_HEIGHT;
        isif_set_format(sd, fh->pad, &format);

        memset(&sel, 0, sizeof(sel));
        sel.pad = ISIF_PAD_SINK;
        sel.which = V4L2_SUBDEV_FORMAT_TRY;
        sel.target = V4L2_SEL_TGT_CROP;
        sel.r.width = MAX_WIDTH;
        sel.r.height = MAX_HEIGHT;
        isif_pad_set_selection(sd, fh->pad, &sel);

        return 0;
}

/* subdev core operations */
static const struct v4l2_subdev_core_ops isif_v4l2_core_ops = {
        .ioctl = isif_ioctl,
};

/* subdev file operations */
static const struct v4l2_subdev_internal_ops isif_v4l2_internal_ops = {
        .open = isif_init_formats,
};

/* subdev video operations */
static const struct v4l2_subdev_video_ops isif_v4l2_video_ops = {
        .s_stream = isif_set_stream,
};

/* subdev pad operations */
static const struct v4l2_subdev_pad_ops isif_v4l2_pad_ops = {
        .enum_mbus_code = isif_enum_mbus_code,
        .enum_frame_size = isif_enum_frame_size,
        .get_fmt = isif_get_format,
        .set_fmt = isif_set_format,
        .set_selection = isif_pad_set_selection,
        .get_selection = isif_pad_get_selection,
};

/* subdev operations */
static const struct v4l2_subdev_ops isif_v4l2_ops = {
        .core = &isif_v4l2_core_ops,
        .video = &isif_v4l2_video_ops,
        .pad = &isif_v4l2_pad_ops,
};

/*
 * Media entity operations
 */

/*
 * isif_link_setup() - Setup isif connections
 * @entity: isif media entity
 * @local: Pad at the local end of the link
 * @remote: Pad at the remote end of the link
 * @flags: Link flags
 *
 * return -EINVAL or zero on success
 */
static int
isif_link_setup(struct media_entity *entity, const struct media_pad *local,
                const struct media_pad *remote, u32 flags)
{
        struct v4l2_subdev *sd = media_entity_to_v4l2_subdev(entity);
        struct vpfe_isif_device *isif = v4l2_get_subdevdata(sd);
        unsigned int index = local->index;

        /* FIXME: this is actually a hack! */
        if (is_media_entity_v4l2_subdev(remote->entity))
                index |= 2 << 16;

        switch (index) {
        case ISIF_PAD_SINK | 2 << 16:
                /* read from decoder/sensor */
                if (!(flags & MEDIA_LNK_FL_ENABLED)) {
                        isif->input = ISIF_INPUT_NONE;
                        break;
                }
                if (isif->input != ISIF_INPUT_NONE)
                        return -EBUSY;
                isif->input = ISIF_INPUT_PARALLEL;
                break;

        case ISIF_PAD_SOURCE:
                /* write to memory */
                if (flags & MEDIA_LNK_FL_ENABLED)
                        isif->output = ISIF_OUTPUT_MEMORY;
                else
                        isif->output = ISIF_OUTPUT_NONE;
                break;

        case ISIF_PAD_SOURCE | 2 << 16:
                if (flags & MEDIA_LNK_FL_ENABLED)
                        isif->output = ISIF_OUTPUT_IPIPEIF;
                else
                        isif->output = ISIF_OUTPUT_NONE;
                break;

        default:
                return -EINVAL;
        }

        return 0;
}
static const struct media_entity_operations isif_media_ops = {
        .link_setup = isif_link_setup,
};

/*
 * vpfe_isif_unregister_entities() - isif unregister entity
 * @isif - pointer to isif subdevice structure.
 */
void vpfe_isif_unregister_entities(struct vpfe_isif_device *isif)
{
        vpfe_video_unregister(&isif->video_out);
        /* unregister subdev */
        v4l2_device_unregister_subdev(&isif->subdev);
        /* cleanup entity */
        media_entity_cleanup(&isif->subdev.entity);
}

static void isif_restore_defaults(struct vpfe_isif_device *isif)
{
        enum vpss_ccdc_source_sel source = VPSS_CCDCIN;
        int i;

        memset(&isif->isif_cfg.bayer.config_params, 0,
               sizeof(struct vpfe_isif_raw_config));

        isif->isif_cfg.bayer.config_params.linearize.corr_shft =
                                        VPFE_ISIF_NO_SHIFT;
        isif->isif_cfg.bayer.config_params.linearize.scale_fact.integer = 1;
        isif->isif_cfg.bayer.config_params.culling.hcpat_odd =
                        ISIF_CULLING_HCAPT_ODD;
        isif->isif_cfg.bayer.config_params.culling.hcpat_even =
                        ISIF_CULLING_HCAPT_EVEN;
        isif->isif_cfg.bayer.config_params.culling.vcpat = ISIF_CULLING_VCAPT;
        /* Enable clock to ISIF, IPIPEIF and BL */
        vpss_enable_clock(VPSS_CCDC_CLOCK, 1);
        vpss_enable_clock(VPSS_IPIPEIF_CLOCK, 1);
        vpss_enable_clock(VPSS_BL_CLOCK, 1);

        /* set all registers to default value */
        for (i = 0; i <= 0x1f8; i += 4)
                isif_write(isif->isif_cfg.base_addr, 0, i);
        /* no culling support */
        isif_write(isif->isif_cfg.base_addr, 0xffff, CULH);
        isif_write(isif->isif_cfg.base_addr, 0xff, CULV);

        /* Set default offset and gain */
        isif_config_gain_offset(isif);
        vpss_select_ccdc_source(source);
}

/*
 * vpfe_isif_register_entities() - isif register entity
 * @isif - pointer to isif subdevice structure.
 * @vdev: pointer to v4l2 device structure.
 */
int vpfe_isif_register_entities(struct vpfe_isif_device *isif,
                            struct v4l2_device *vdev)
{
        struct vpfe_device *vpfe_dev = to_vpfe_device(isif);
        unsigned int flags;
        int ret;

        /* Register the subdev */
        ret = v4l2_device_register_subdev(vdev, &isif->subdev);
        if (ret < 0)
                return ret;

        isif_restore_defaults(isif);
        ret = vpfe_video_register(&isif->video_out, vdev);
        if (ret) {
                pr_err("Failed to register isif video out device\n");
                goto out_video_register;
        }
        isif->video_out.vpfe_dev = vpfe_dev;
        flags = 0;
        /* connect isif to video node */
        ret = media_create_pad_link(&isif->subdev.entity, 1,
                                       &isif->video_out.video_dev.entity,
                                       0, flags);
        if (ret < 0)
                goto out_create_link;
        return 0;
out_create_link:
        vpfe_video_unregister(&isif->video_out);
out_video_register:
        v4l2_device_unregister_subdev(&isif->subdev);
        return ret;
}

/* -------------------------------------------------------------------
 * V4L2 subdev control operations
 */

static int vpfe_isif_s_ctrl(struct v4l2_ctrl *ctrl)
{
        struct vpfe_isif_device *isif =
             container_of(ctrl->handler, struct vpfe_isif_device, ctrls);
        struct isif_oper_config *config = &isif->isif_cfg;

        switch (ctrl->id) {
        case VPFE_CID_DPCM_PREDICTOR:
                config->bayer.dpcm_predictor = ctrl->val;
                break;

        case VPFE_ISIF_CID_CRGAIN:
                config->isif_gain_params.cr_gain = ctrl->val;
                break;

        case VPFE_ISIF_CID_CGRGAIN:
                config->isif_gain_params.cgr_gain = ctrl->val;
                break;

        case VPFE_ISIF_CID_CGBGAIN:
                config->isif_gain_params.cgb_gain = ctrl->val;
                break;

        case VPFE_ISIF_CID_CBGAIN:
                config->isif_gain_params.cb_gain = ctrl->val;
                break;

        case VPFE_ISIF_CID_GAIN_OFFSET:
                config->isif_gain_params.offset = ctrl->val;
                break;

        default:
                return -EINVAL;
        }
        return 0;
}

static const struct v4l2_ctrl_ops vpfe_isif_ctrl_ops = {
        .s_ctrl = vpfe_isif_s_ctrl,
};

static const struct v4l2_ctrl_config vpfe_isif_dpcm_pred = {
        .ops = &vpfe_isif_ctrl_ops,
        .id = VPFE_CID_DPCM_PREDICTOR,
        .name = "DPCM Predictor",
        .type = V4L2_CTRL_TYPE_INTEGER,
        .min = 0,
        .max = 1,
        .step = 1,
        .def = 0,
};

static const struct v4l2_ctrl_config vpfe_isif_crgain = {
        .ops = &vpfe_isif_ctrl_ops,
        .id = VPFE_ISIF_CID_CRGAIN,
        .name = "CRGAIN",
        .type = V4L2_CTRL_TYPE_INTEGER,
        .min = 0,
        .max = (1 << 12) - 1,
        .step = 1,
        .def = 0,
};

static const struct v4l2_ctrl_config vpfe_isif_cgrgain = {
        .ops = &vpfe_isif_ctrl_ops,
        .id = VPFE_ISIF_CID_CGRGAIN,
        .name = "CGRGAIN",
        .type = V4L2_CTRL_TYPE_INTEGER,
        .min = 0,
        .max = (1 << 12) - 1,
        .step = 1,
        .def = 0,
};

static const struct v4l2_ctrl_config vpfe_isif_cgbgain = {
        .ops = &vpfe_isif_ctrl_ops,
        .id = VPFE_ISIF_CID_CGBGAIN,
        .name = "CGBGAIN",
        .type = V4L2_CTRL_TYPE_INTEGER,
        .min = 0,
        .max = (1 << 12) - 1,
        .step = 1,
        .def = 0,
};

static const struct v4l2_ctrl_config vpfe_isif_cbgain = {
        .ops = &vpfe_isif_ctrl_ops,
        .id = VPFE_ISIF_CID_CBGAIN,
        .name = "CBGAIN",
        .type = V4L2_CTRL_TYPE_INTEGER,
        .min = 0,
        .max = (1 << 12) - 1,
        .step = 1,
        .def = 0,
};

static const struct v4l2_ctrl_config vpfe_isif_gain_offset = {
        .ops = &vpfe_isif_ctrl_ops,
        .id = VPFE_ISIF_CID_GAIN_OFFSET,
        .name = "Gain Offset",
        .type = V4L2_CTRL_TYPE_INTEGER,
        .min = 0,
        .max = (1 << 12) - 1,
        .step = 1,
        .def = 0,
};

static void isif_remove(struct vpfe_isif_device *isif,
                        struct platform_device *pdev)
{
        struct resource *res;
        int i = 0;

        iounmap(isif->isif_cfg.base_addr);
        iounmap(isif->isif_cfg.linear_tbl0_addr);
        iounmap(isif->isif_cfg.linear_tbl1_addr);

        while (i < 3) {
                res = platform_get_resource(pdev, IORESOURCE_MEM, i);
                if (res)
                        release_mem_region(res->start,
                                           resource_size(res));
                i++;
        }
}

static void isif_config_defaults(struct vpfe_isif_device *isif)
{
        isif->isif_cfg.ycbcr.v4l2_pix_fmt = V4L2_PIX_FMT_UYVY;
        isif->isif_cfg.ycbcr.pix_fmt = ISIF_PIXFMT_YCBCR_8BIT;
        isif->isif_cfg.ycbcr.frm_fmt = ISIF_FRMFMT_INTERLACED;
        isif->isif_cfg.ycbcr.fid_pol = VPFE_PINPOL_POSITIVE;
        isif->isif_cfg.ycbcr.vd_pol = VPFE_PINPOL_POSITIVE;
        isif->isif_cfg.ycbcr.hd_pol = VPFE_PINPOL_POSITIVE;
        isif->isif_cfg.ycbcr.pix_order = ISIF_PIXORDER_CBYCRY;
        isif->isif_cfg.ycbcr.buf_type = ISIF_BUFTYPE_FLD_INTERLEAVED;

        isif->isif_cfg.bayer.v4l2_pix_fmt = V4L2_PIX_FMT_SGRBG10ALAW8;
        isif->isif_cfg.bayer.pix_fmt = ISIF_PIXFMT_RAW;
        isif->isif_cfg.bayer.frm_fmt = ISIF_FRMFMT_PROGRESSIVE;
        isif->isif_cfg.bayer.fid_pol = VPFE_PINPOL_POSITIVE;
        isif->isif_cfg.bayer.vd_pol = VPFE_PINPOL_POSITIVE;
        isif->isif_cfg.bayer.hd_pol = VPFE_PINPOL_POSITIVE;
        isif->isif_cfg.bayer.cfa_pat = ISIF_CFA_PAT_MOSAIC;
        isif->isif_cfg.bayer.data_msb = ISIF_BIT_MSB_11;
        isif->isif_cfg.data_pack = ISIF_PACK_8BIT;
}
/*
 * vpfe_isif_init() - Initialize V4L2 subdev and media entity
 * @isif: VPFE isif module
 * @pdev: Pointer to platform device structure.
 * Return 0 on success and a negative error code on failure.
 */
int vpfe_isif_init(struct vpfe_isif_device *isif, struct platform_device *pdev)
{
        struct v4l2_subdev *sd = &isif->subdev;
        struct media_pad *pads = &isif->pads[0];
        struct media_entity *me = &sd->entity;
        static resource_size_t res_len;
        struct resource *res;
        void __iomem *addr;
        int status;
        int i = 0;

        /* Get the ISIF base address, linearization table0 and table1 addr. */
        while (i < 3) {
                res = platform_get_resource(pdev, IORESOURCE_MEM, i);
                if (!res) {
                        status = -ENOENT;
                        goto fail_nobase_res;
                }
                res_len = resource_size(res);
                res = request_mem_region(res->start, res_len, res->name);
                if (!res) {
                        status = -EBUSY;
                        goto fail_nobase_res;
                }
                addr = ioremap_nocache(res->start, res_len);
                if (!addr) {
                        status = -EBUSY;
                        goto fail_base_iomap;
                }
                switch (i) {
                case 0:
                        /* ISIF base address */
                        isif->isif_cfg.base_addr = addr;
                        break;
                case 1:
                        /* ISIF linear tbl0 address */
                        isif->isif_cfg.linear_tbl0_addr = addr;
                        break;
                default:
                        /* ISIF linear tbl0 address */
                        isif->isif_cfg.linear_tbl1_addr = addr;
                        break;
                }
                i++;
        }
        davinci_cfg_reg(DM365_VIN_CAM_WEN);
        davinci_cfg_reg(DM365_VIN_CAM_VD);
        davinci_cfg_reg(DM365_VIN_CAM_HD);
        davinci_cfg_reg(DM365_VIN_YIN4_7_EN);
        davinci_cfg_reg(DM365_VIN_YIN0_3_EN);

        /* queue ops */
        isif->video_out.ops = &isif_video_ops;
        v4l2_subdev_init(sd, &isif_v4l2_ops);
        sd->internal_ops = &isif_v4l2_internal_ops;
        strlcpy(sd->name, "DAVINCI ISIF", sizeof(sd->name));
        sd->grp_id = 1 << 16;   /* group ID for davinci subdevs */
        v4l2_set_subdevdata(sd, isif);
        sd->flags |= V4L2_SUBDEV_FL_HAS_EVENTS | V4L2_SUBDEV_FL_HAS_DEVNODE;
        pads[ISIF_PAD_SINK].flags = MEDIA_PAD_FL_SINK;
        pads[ISIF_PAD_SOURCE].flags = MEDIA_PAD_FL_SOURCE;

        isif->input = ISIF_INPUT_NONE;
        isif->output = ISIF_OUTPUT_NONE;
        me->ops = &isif_media_ops;
        status = media_entity_pads_init(me, ISIF_PADS_NUM, pads);
        if (status)
                goto isif_fail;
        isif->video_out.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
        status = vpfe_video_init(&isif->video_out, "ISIF");
        if (status) {
                pr_err("Failed to init isif-out video device\n");
                goto isif_fail;
        }
        v4l2_ctrl_handler_init(&isif->ctrls, 6);
        v4l2_ctrl_new_custom(&isif->ctrls, &vpfe_isif_crgain, NULL);
        v4l2_ctrl_new_custom(&isif->ctrls, &vpfe_isif_cgrgain, NULL);
        v4l2_ctrl_new_custom(&isif->ctrls, &vpfe_isif_cgbgain, NULL);
        v4l2_ctrl_new_custom(&isif->ctrls, &vpfe_isif_cbgain, NULL);
        v4l2_ctrl_new_custom(&isif->ctrls, &vpfe_isif_gain_offset, NULL);
        v4l2_ctrl_new_custom(&isif->ctrls, &vpfe_isif_dpcm_pred, NULL);

        v4l2_ctrl_handler_setup(&isif->ctrls);
        sd->ctrl_handler = &isif->ctrls;
        isif_config_defaults(isif);
        return 0;
fail_base_iomap:
        release_mem_region(res->start, res_len);
        i--;
fail_nobase_res:
        if (isif->isif_cfg.base_addr)
                iounmap(isif->isif_cfg.base_addr);
        if (isif->isif_cfg.linear_tbl0_addr)
                iounmap(isif->isif_cfg.linear_tbl0_addr);

        while (i >= 0) {
                res = platform_get_resource(pdev, IORESOURCE_MEM, i);
                release_mem_region(res->start, res_len);
                i--;
        }
        return status;
isif_fail:
        v4l2_ctrl_handler_free(&isif->ctrls);
        isif_remove(isif, pdev);
        return status;
}

/*
 * vpfe_isif_cleanup - isif module cleanup
 * @isif: pointer to isif subdevice
 * @dev: pointer to platform device structure
 */
void
vpfe_isif_cleanup(struct vpfe_isif_device *isif, struct platform_device *pdev)
{
        isif_remove(isif, pdev);
}