/*
 * Copyright (C) 2005-2009 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; either version 2 of the License, or
 * (at your option) any later version.
 *
 * 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
 *
 * CCDC hardware module for DM355
 * ------------------------------
 *
 * This module is for configuring DM355 CCD controller of VPFE to capture
 * Raw yuv or Bayer RGB data from a decoder. CCDC has several modules
 * such as Defect Pixel Correction, Color Space Conversion etc to
 * pre-process the Bayer RGB data, before writing it to SDRAM. This
 * module also allows application to configure individual
 * module parameters through VPFE_CMD_S_CCDC_RAW_PARAMS IOCTL.
 * To do so, application include dm355_ccdc.h and vpfe_capture.h header
 * files. The setparams() API is called by vpfe_capture driver
 * to configure module parameters
 *
 * TODO: 1) Raw bayer parameter settings and bayer capture
 *       2) Split module parameter structure to module specific ioctl structs
 *       3) add support for lense shading correction
 *       4) investigate if enum used for user space type definition
 *          to be replaced by #defines or integer
 */
#include <linux/platform_device.h>
#include <linux/uaccess.h>
#include <linux/videodev2.h>
#include <linux/err.h>
#include <linux/module.h>

#include <media/davinci/dm355_ccdc.h>
#include <media/davinci/vpss.h>

#include "dm355_ccdc_regs.h"
#include "ccdc_hw_device.h"

MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("CCDC Driver for DM355");
MODULE_AUTHOR("Texas Instruments");

static struct ccdc_oper_config {
        struct device *dev;
        /* CCDC interface type */
        enum vpfe_hw_if_type if_type;
        /* Raw Bayer configuration */
        struct ccdc_params_raw bayer;
        /* YCbCr configuration */
        struct ccdc_params_ycbcr ycbcr;
        /* ccdc base address */
        void __iomem *base_addr;
} ccdc_cfg = {
        /* Raw configurations */
        .bayer = {
                .pix_fmt = CCDC_PIXFMT_RAW,
                .frm_fmt = CCDC_FRMFMT_PROGRESSIVE,
                .win = CCDC_WIN_VGA,
                .fid_pol = VPFE_PINPOL_POSITIVE,
                .vd_pol = VPFE_PINPOL_POSITIVE,
                .hd_pol = VPFE_PINPOL_POSITIVE,
                .gain = {
                        .r_ye = 256,
                        .gb_g = 256,
                        .gr_cy = 256,
                        .b_mg = 256
                },
                .config_params = {
                        .datasft = 2,
                        .mfilt1 = CCDC_NO_MEDIAN_FILTER1,
                        .mfilt2 = CCDC_NO_MEDIAN_FILTER2,
                        .alaw = {
                                .gamma_wd = 2,
                        },
                        .blk_clamp = {
                                .sample_pixel = 1,
                                .dc_sub = 25
                        },
                        .col_pat_field0 = {
                                .olop = CCDC_GREEN_BLUE,
                                .olep = CCDC_BLUE,
                                .elop = CCDC_RED,
                                .elep = CCDC_GREEN_RED
                        },
                        .col_pat_field1 = {
                                .olop = CCDC_GREEN_BLUE,
                                .olep = CCDC_BLUE,
                                .elop = CCDC_RED,
                                .elep = CCDC_GREEN_RED
                        },
                },
        },
        /* YCbCr configuration */
        .ycbcr = {
                .win = CCDC_WIN_PAL,
                .pix_fmt = CCDC_PIXFMT_YCBCR_8BIT,
                .frm_fmt = CCDC_FRMFMT_INTERLACED,
                .fid_pol = VPFE_PINPOL_POSITIVE,
                .vd_pol = VPFE_PINPOL_POSITIVE,
                .hd_pol = VPFE_PINPOL_POSITIVE,
                .bt656_enable = 1,
                .pix_order = CCDC_PIXORDER_CBYCRY,
                .buf_type = CCDC_BUFTYPE_FLD_INTERLEAVED
        },
};


/* Raw Bayer formats */
static u32 ccdc_raw_bayer_pix_formats[] =
                {V4L2_PIX_FMT_SBGGR8, V4L2_PIX_FMT_SBGGR16};

/* Raw YUV formats */
static u32 ccdc_raw_yuv_pix_formats[] =
                {V4L2_PIX_FMT_UYVY, V4L2_PIX_FMT_YUYV};

/* register access routines */
static inline u32 regr(u32 offset)
{
        return __raw_readl(ccdc_cfg.base_addr + offset);
}

static inline void regw(u32 val, u32 offset)
{
        __raw_writel(val, ccdc_cfg.base_addr + offset);
}

static void ccdc_enable(int en)
{
        unsigned int temp;
        temp = regr(SYNCEN);
        temp &= (~CCDC_SYNCEN_VDHDEN_MASK);
        temp |= (en & CCDC_SYNCEN_VDHDEN_MASK);
        regw(temp, SYNCEN);
}

static void ccdc_enable_output_to_sdram(int en)
{
        unsigned int temp;
        temp = regr(SYNCEN);
        temp &= (~(CCDC_SYNCEN_WEN_MASK));
        temp |= ((en << CCDC_SYNCEN_WEN_SHIFT) & CCDC_SYNCEN_WEN_MASK);
        regw(temp, SYNCEN);
}

static void ccdc_config_gain_offset(void)
{
        /* configure gain */
        regw(ccdc_cfg.bayer.gain.r_ye, RYEGAIN);
        regw(ccdc_cfg.bayer.gain.gr_cy, GRCYGAIN);
        regw(ccdc_cfg.bayer.gain.gb_g, GBGGAIN);
        regw(ccdc_cfg.bayer.gain.b_mg, BMGGAIN);
        /* configure offset */
        regw(ccdc_cfg.bayer.ccdc_offset, OFFSET);
}

/*
 * ccdc_restore_defaults()
 * This function restore power on defaults in the ccdc registers
 */
static int ccdc_restore_defaults(void)
{
        int i;

        dev_dbg(ccdc_cfg.dev, "\nstarting ccdc_restore_defaults...");
        /* set all registers to zero */
        for (i = 0; i <= CCDC_REG_LAST; i += 4)
                regw(0, i);

        /* now override the values with power on defaults in registers */
        regw(MODESET_DEFAULT, MODESET);
        /* no culling support */
        regw(CULH_DEFAULT, CULH);
        regw(CULV_DEFAULT, CULV);
        /* Set default Gain and Offset */
        ccdc_cfg.bayer.gain.r_ye = GAIN_DEFAULT;
        ccdc_cfg.bayer.gain.gb_g = GAIN_DEFAULT;
        ccdc_cfg.bayer.gain.gr_cy = GAIN_DEFAULT;
        ccdc_cfg.bayer.gain.b_mg = GAIN_DEFAULT;
        ccdc_config_gain_offset();
        regw(OUTCLIP_DEFAULT, OUTCLIP);
        regw(LSCCFG2_DEFAULT, LSCCFG2);
        /* select ccdc input */
        if (vpss_select_ccdc_source(VPSS_CCDCIN)) {
                dev_dbg(ccdc_cfg.dev, "\ncouldn't select ccdc input source");
                return -EFAULT;
        }
        /* select ccdc clock */
        if (vpss_enable_clock(VPSS_CCDC_CLOCK, 1) < 0) {
                dev_dbg(ccdc_cfg.dev, "\ncouldn't enable ccdc clock");
                return -EFAULT;
        }
        dev_dbg(ccdc_cfg.dev, "\nEnd of ccdc_restore_defaults...");
        return 0;
}

static int ccdc_open(struct device *device)
{
        return ccdc_restore_defaults();
}

static int ccdc_close(struct device *device)
{
        /* disable clock */
        vpss_enable_clock(VPSS_CCDC_CLOCK, 0);
        /* do nothing for now */
        return 0;
}
/*
 * ccdc_setwin()
 * This function will configure the window size to
 * be capture in CCDC reg.
 */
static void ccdc_setwin(struct v4l2_rect *image_win,
                        enum ccdc_frmfmt frm_fmt, int ppc)
{
        int horz_start, horz_nr_pixels;
        int vert_start, vert_nr_lines;
        int mid_img = 0;

        dev_dbg(ccdc_cfg.dev, "\nStarting ccdc_setwin...");

        /*
         * 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 */
        regw(horz_start, SPH);
        regw(horz_nr_pixels, NPH);
        vert_start = image_win->top;

        if (frm_fmt == CCDC_FRMFMT_INTERLACED) {
                vert_nr_lines = (image_win->height >> 1) - 1;
                vert_start >>= 1;
                /* Since first line doesn't have any data */
                vert_start += 1;
                /* configure VDINT0 and VDINT1 */
                regw(vert_start, VDINT0);
        } else {
                /* Since first line 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);
                regw(vert_start, VDINT0);
                regw(mid_img, VDINT1);
        }
        regw(vert_start & CCDC_START_VER_ONE_MASK, SLV0);
        regw(vert_start & CCDC_START_VER_TWO_MASK, SLV1);
        regw(vert_nr_lines & CCDC_NUM_LINES_VER, NLV);
        dev_dbg(ccdc_cfg.dev, "\nEnd of ccdc_setwin...");
}

static int validate_ccdc_param(struct ccdc_config_params_raw *ccdcparam)
{
        if (ccdcparam->datasft < CCDC_DATA_NO_SHIFT ||
            ccdcparam->datasft > CCDC_DATA_SHIFT_6BIT) {
                dev_dbg(ccdc_cfg.dev, "Invalid value of data shift\n");
                return -EINVAL;
        }

        if (ccdcparam->mfilt1 < CCDC_NO_MEDIAN_FILTER1 ||
            ccdcparam->mfilt1 > CCDC_MEDIAN_FILTER1) {
                dev_dbg(ccdc_cfg.dev, "Invalid value of median filter1\n");
                return -EINVAL;
        }

        if (ccdcparam->mfilt2 < CCDC_NO_MEDIAN_FILTER2 ||
            ccdcparam->mfilt2 > CCDC_MEDIAN_FILTER2) {
                dev_dbg(ccdc_cfg.dev, "Invalid value of median filter2\n");
                return -EINVAL;
        }

        if ((ccdcparam->med_filt_thres < 0) ||
           (ccdcparam->med_filt_thres > CCDC_MED_FILT_THRESH)) {
                dev_dbg(ccdc_cfg.dev,
                        "Invalid value of median filter threshold\n");
                return -EINVAL;
        }

        if (ccdcparam->data_sz < CCDC_DATA_16BITS ||
            ccdcparam->data_sz > CCDC_DATA_8BITS) {
                dev_dbg(ccdc_cfg.dev, "Invalid value of data size\n");
                return -EINVAL;
        }

        if (ccdcparam->alaw.enable) {
                if (ccdcparam->alaw.gamma_wd < CCDC_GAMMA_BITS_13_4 ||
                    ccdcparam->alaw.gamma_wd > CCDC_GAMMA_BITS_09_0) {
                        dev_dbg(ccdc_cfg.dev, "Invalid value of ALAW\n");
                        return -EINVAL;
                }
        }

        if (ccdcparam->blk_clamp.b_clamp_enable) {
                if (ccdcparam->blk_clamp.sample_pixel < CCDC_SAMPLE_1PIXELS ||
                    ccdcparam->blk_clamp.sample_pixel > CCDC_SAMPLE_16PIXELS) {
                        dev_dbg(ccdc_cfg.dev,
                                "Invalid value of sample pixel\n");
                        return -EINVAL;
                }
                if (ccdcparam->blk_clamp.sample_ln < CCDC_SAMPLE_1LINES ||
                    ccdcparam->blk_clamp.sample_ln > CCDC_SAMPLE_16LINES) {
                        dev_dbg(ccdc_cfg.dev,
                                "Invalid value of sample lines\n");
                        return -EINVAL;
                }
        }
        return 0;
}

/* Parameter operations */
static int ccdc_set_params(void __user *params)
{
        struct ccdc_config_params_raw ccdc_raw_params;
        int x;

        /* only raw module parameters can be set through the IOCTL */
        if (ccdc_cfg.if_type != VPFE_RAW_BAYER)
                return -EINVAL;

        x = copy_from_user(&ccdc_raw_params, params, sizeof(ccdc_raw_params));
        if (x) {
                dev_dbg(ccdc_cfg.dev, "ccdc_set_params: error in copying ccdc"
                        "params, %d\n", x);
                return -EFAULT;
        }

        if (!validate_ccdc_param(&ccdc_raw_params)) {
                memcpy(&ccdc_cfg.bayer.config_params,
                        &ccdc_raw_params,
                        sizeof(ccdc_raw_params));
                return 0;
        }
        return -EINVAL;
}

/* This function will configure CCDC for YCbCr video capture */
static void ccdc_config_ycbcr(void)
{
        struct ccdc_params_ycbcr *params = &ccdc_cfg.ycbcr;
        u32 temp;

        /* first set the CCDC power on defaults values in all registers */
        dev_dbg(ccdc_cfg.dev, "\nStarting ccdc_config_ycbcr...");
        ccdc_restore_defaults();

        /* configure pixel format & video frame format */
        temp = (((params->pix_fmt & CCDC_INPUT_MODE_MASK) <<
                CCDC_INPUT_MODE_SHIFT) |
                ((params->frm_fmt & CCDC_FRM_FMT_MASK) <<
                CCDC_FRM_FMT_SHIFT));

        /* setup BT.656 sync mode */
        if (params->bt656_enable) {
                regw(CCDC_REC656IF_BT656_EN, REC656IF);
                /*
                 * configure the FID, VD, HD pin polarity fld,hd pol positive,
                 * vd negative, 8-bit pack mode
                 */
                temp |= CCDC_VD_POL_NEGATIVE;
        } else {                /* y/c external sync mode */
                temp |= (((params->fid_pol & CCDC_FID_POL_MASK) <<
                        CCDC_FID_POL_SHIFT) |
                        ((params->hd_pol & CCDC_HD_POL_MASK) <<
                        CCDC_HD_POL_SHIFT) |
                        ((params->vd_pol & CCDC_VD_POL_MASK) <<
                        CCDC_VD_POL_SHIFT));
        }

        /* pack the data to 8-bit */
        temp |= CCDC_DATA_PACK_ENABLE;

        regw(temp, MODESET);

        /* configure video window */
        ccdc_setwin(&params->win, params->frm_fmt, 2);

        /* configure the order of y cb cr in SD-RAM */
        temp = (params->pix_order << CCDC_Y8POS_SHIFT);
        temp |= CCDC_LATCH_ON_VSYNC_DISABLE | CCDC_CCDCFG_FIDMD_NO_LATCH_VSYNC;
        regw(temp, CCDCFG);

        /*
         * 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
         */
        regw(((params->win.width * 2 + 31) >> 5), HSIZE);

        /* configure the memory line offset */
        if (params->buf_type == CCDC_BUFTYPE_FLD_INTERLEAVED) {
                /* two fields are interleaved in memory */
                regw(CCDC_SDOFST_FIELD_INTERLEAVED, SDOFST);
        }

        dev_dbg(ccdc_cfg.dev, "\nEnd of ccdc_config_ycbcr...\n");
}

/*
 * ccdc_config_black_clamp()
 * configure parameters for Optical Black Clamp
 */
static void ccdc_config_black_clamp(struct ccdc_black_clamp *bclamp)
{
        u32 val;

        if (!bclamp->b_clamp_enable) {
                /* configure DCSub */
                regw(bclamp->dc_sub & CCDC_BLK_DC_SUB_MASK, DCSUB);
                regw(0x0000, CLAMP);
                return;
        }
        /* Enable the Black clamping, set sample lines and pixels */
        val = (bclamp->start_pixel & CCDC_BLK_ST_PXL_MASK) |
              ((bclamp->sample_pixel & CCDC_BLK_SAMPLE_LN_MASK) <<
                CCDC_BLK_SAMPLE_LN_SHIFT) | CCDC_BLK_CLAMP_ENABLE;
        regw(val, CLAMP);

        /* If Black clamping is enable then make dcsub 0 */
        val = (bclamp->sample_ln & CCDC_NUM_LINE_CALC_MASK)
                        << CCDC_NUM_LINE_CALC_SHIFT;
        regw(val, DCSUB);
}

/*
 * ccdc_config_black_compense()
 * configure parameters for Black Compensation
 */
static void ccdc_config_black_compense(struct ccdc_black_compensation *bcomp)
{
        u32 val;

        val = (bcomp->b & CCDC_BLK_COMP_MASK) |
                ((bcomp->gb & CCDC_BLK_COMP_MASK) <<
                CCDC_BLK_COMP_GB_COMP_SHIFT);
        regw(val, BLKCMP1);

        val = ((bcomp->gr & CCDC_BLK_COMP_MASK) <<
                CCDC_BLK_COMP_GR_COMP_SHIFT) |
                ((bcomp->r & CCDC_BLK_COMP_MASK) <<
                CCDC_BLK_COMP_R_COMP_SHIFT);
        regw(val, BLKCMP0);
}

/*
 * ccdc_write_dfc_entry()
 * write an entry in the dfc table.
 */
int ccdc_write_dfc_entry(int index, struct ccdc_vertical_dft *dfc)
{
/* TODO This is to be re-visited and adjusted */
#define DFC_WRITE_WAIT_COUNT    1000
        u32 val, count = DFC_WRITE_WAIT_COUNT;

        regw(dfc->dft_corr_vert[index], DFCMEM0);
        regw(dfc->dft_corr_horz[index], DFCMEM1);
        regw(dfc->dft_corr_sub1[index], DFCMEM2);
        regw(dfc->dft_corr_sub2[index], DFCMEM3);
        regw(dfc->dft_corr_sub3[index], DFCMEM4);
        /* set WR bit to write */
        val = regr(DFCMEMCTL) | CCDC_DFCMEMCTL_DFCMWR_MASK;
        regw(val, DFCMEMCTL);

        /*
         * Assume, it is very short. If we get an error, we need to
         * adjust this value
         */
        while (regr(DFCMEMCTL) & CCDC_DFCMEMCTL_DFCMWR_MASK)
                count--;
        /*
         * TODO We expect the count to be non-zero to be successful. Adjust
         * the count if write requires more time
         */

        if (count) {
                dev_err(ccdc_cfg.dev, "defect table write timeout !!!\n");
                return -1;
        }
        return 0;
}

/*
 * ccdc_config_vdfc()
 * configure parameters for Vertical Defect Correction
 */
static int ccdc_config_vdfc(struct ccdc_vertical_dft *dfc)
{
        u32 val;
        int i;

        /* Configure General Defect Correction. The table used is from IPIPE */
        val = dfc->gen_dft_en & CCDC_DFCCTL_GDFCEN_MASK;

        /* Configure Vertical Defect Correction if needed */
        if (!dfc->ver_dft_en) {
                /* Enable only General Defect Correction */
                regw(val, DFCCTL);
                return 0;
        }

        if (dfc->table_size > CCDC_DFT_TABLE_SIZE)
                return -EINVAL;

        val |= CCDC_DFCCTL_VDFC_DISABLE;
        val |= (dfc->dft_corr_ctl.vdfcsl & CCDC_DFCCTL_VDFCSL_MASK) <<
                CCDC_DFCCTL_VDFCSL_SHIFT;
        val |= (dfc->dft_corr_ctl.vdfcuda & CCDC_DFCCTL_VDFCUDA_MASK) <<
                CCDC_DFCCTL_VDFCUDA_SHIFT;
        val |= (dfc->dft_corr_ctl.vdflsft & CCDC_DFCCTL_VDFLSFT_MASK) <<
                CCDC_DFCCTL_VDFLSFT_SHIFT;
        regw(val , DFCCTL);

        /* clear address ptr to offset 0 */
        val = CCDC_DFCMEMCTL_DFCMARST_MASK << CCDC_DFCMEMCTL_DFCMARST_SHIFT;

        /* write defect table entries */
        for (i = 0; i < dfc->table_size; i++) {
                /* increment address for non zero index */
                if (i != 0)
                        val = CCDC_DFCMEMCTL_INC_ADDR;
                regw(val, DFCMEMCTL);
                if (ccdc_write_dfc_entry(i, dfc) < 0)
                        return -EFAULT;
        }

        /* update saturation level and enable dfc */
        regw(dfc->saturation_ctl & CCDC_VDC_DFCVSAT_MASK, DFCVSAT);
        val = regr(DFCCTL) | (CCDC_DFCCTL_VDFCEN_MASK <<
                        CCDC_DFCCTL_VDFCEN_SHIFT);
        regw(val, DFCCTL);
        return 0;
}

/*
 * ccdc_config_csc()
 * configure parameters for color space conversion
 * Each register CSCM0-7 has two values in S8Q5 format.
 */
static void ccdc_config_csc(struct ccdc_csc *csc)
{
        u32 val1 = 0, val2;
        int i;

        if (!csc->enable)
                return;

        /* Enable the CSC sub-module */
        regw(CCDC_CSC_ENABLE, CSCCTL);

        /* Converting the co-eff as per the format of the register */
        for (i = 0; i < CCDC_CSC_COEFF_TABLE_SIZE; i++) {
                if ((i % 2) == 0) {
                        /* CSCM - LSB */
                        val1 = (csc->coeff[i].integer &
                                CCDC_CSC_COEF_INTEG_MASK)
                                << CCDC_CSC_COEF_INTEG_SHIFT;
                        /*
                         * convert decimal part to binary. Use 2 decimal
                         * precision, user values range from .00 - 0.99
                         */
                        val1 |= (((csc->coeff[i].decimal &
                                CCDC_CSC_COEF_DECIMAL_MASK) *
                                CCDC_CSC_DEC_MAX) / 100);
                } else {

                        /* CSCM - MSB */
                        val2 = (csc->coeff[i].integer &
                                CCDC_CSC_COEF_INTEG_MASK)
                                << CCDC_CSC_COEF_INTEG_SHIFT;
                        val2 |= (((csc->coeff[i].decimal &
                                 CCDC_CSC_COEF_DECIMAL_MASK) *
                                 CCDC_CSC_DEC_MAX) / 100);
                        val2 <<= CCDC_CSCM_MSB_SHIFT;
                        val2 |= val1;
                        regw(val2, (CSCM0 + ((i - 1) << 1)));
                }
        }
}

/*
 * ccdc_config_color_patterns()
 * configure parameters for color patterns
 */
static void ccdc_config_color_patterns(struct ccdc_col_pat *pat0,
                                       struct ccdc_col_pat *pat1)
{
        u32 val;

        val = (pat0->olop | (pat0->olep << 2) | (pat0->elop << 4) |
                (pat0->elep << 6) | (pat1->olop << 8) | (pat1->olep << 10) |
                (pat1->elop << 12) | (pat1->elep << 14));
        regw(val, COLPTN);
}

/* This function will configure CCDC for Raw mode image capture */
static int ccdc_config_raw(void)
{
        struct ccdc_params_raw *params = &ccdc_cfg.bayer;
        struct ccdc_config_params_raw *config_params =
                                        &ccdc_cfg.bayer.config_params;
        unsigned int val;

        dev_dbg(ccdc_cfg.dev, "\nStarting ccdc_config_raw...");

        /* restore power on defaults to register */
        ccdc_restore_defaults();

        /* CCDCFG register:
         * set CCD Not to swap input since input is RAW data
         * set FID detection function to Latch at V-Sync
         * set WENLOG - ccdc valid area to AND
         * set TRGSEL to WENBIT
         * set EXTRG to DISABLE
         * disable latching function on VSYNC - shadowed registers
         */
        regw(CCDC_YCINSWP_RAW | CCDC_CCDCFG_FIDMD_LATCH_VSYNC |
             CCDC_CCDCFG_WENLOG_AND | CCDC_CCDCFG_TRGSEL_WEN |
             CCDC_CCDCFG_EXTRG_DISABLE | CCDC_LATCH_ON_VSYNC_DISABLE, CCDCFG);

        /*
         * Set VDHD direction to input,  input type to raw input
         * normal data polarity, do not use external WEN
         */
        val = (CCDC_VDHDOUT_INPUT | CCDC_RAW_IP_MODE | CCDC_DATAPOL_NORMAL |
                CCDC_EXWEN_DISABLE);

        /*
         * Configure the vertical sync polarity (MODESET.VDPOL), horizontal
         * sync polarity (MODESET.HDPOL), field id polarity (MODESET.FLDPOL),
         * frame format(progressive or interlace), & pixel format (Input mode)
         */
        val |= (((params->vd_pol & CCDC_VD_POL_MASK) << CCDC_VD_POL_SHIFT) |
                ((params->hd_pol & CCDC_HD_POL_MASK) << CCDC_HD_POL_SHIFT) |
                ((params->fid_pol & CCDC_FID_POL_MASK) << CCDC_FID_POL_SHIFT) |
                ((params->frm_fmt & CCDC_FRM_FMT_MASK) << CCDC_FRM_FMT_SHIFT) |
                ((params->pix_fmt & CCDC_PIX_FMT_MASK) << CCDC_PIX_FMT_SHIFT));

        /* set pack for alaw compression */
        if ((config_params->data_sz == CCDC_DATA_8BITS) ||
             config_params->alaw.enable)
                val |= CCDC_DATA_PACK_ENABLE;

        /* Configure for LPF */
        if (config_params->lpf_enable)
                val |= (config_params->lpf_enable & CCDC_LPF_MASK) <<
                        CCDC_LPF_SHIFT;

        /* Configure the data shift */
        val |= (config_params->datasft & CCDC_DATASFT_MASK) <<
                CCDC_DATASFT_SHIFT;
        regw(val , MODESET);
        dev_dbg(ccdc_cfg.dev, "\nWriting 0x%x to MODESET...\n", val);

        /* Configure the Median Filter threshold */
        regw((config_params->med_filt_thres) & CCDC_MED_FILT_THRESH, MEDFILT);

        /* Configure GAMMAWD register. defaur 11-2, and Mosaic cfa pattern */
        val = CCDC_GAMMA_BITS_11_2 << CCDC_GAMMAWD_INPUT_SHIFT |
                CCDC_CFA_MOSAIC;

        /* Enable and configure aLaw register if needed */
        if (config_params->alaw.enable) {
                val |= (CCDC_ALAW_ENABLE |
                        ((config_params->alaw.gamma_wd &
                        CCDC_ALAW_GAMMA_WD_MASK) <<
                        CCDC_GAMMAWD_INPUT_SHIFT));
        }

        /* Configure Median filter1 & filter2 */
        val |= ((config_params->mfilt1 << CCDC_MFILT1_SHIFT) |
                (config_params->mfilt2 << CCDC_MFILT2_SHIFT));

        regw(val, GAMMAWD);
        dev_dbg(ccdc_cfg.dev, "\nWriting 0x%x to GAMMAWD...\n", val);

        /* configure video window */
        ccdc_setwin(&params->win, params->frm_fmt, 1);

        /* Optical Clamp Averaging */
        ccdc_config_black_clamp(&config_params->blk_clamp);

        /* Black level compensation */
        ccdc_config_black_compense(&config_params->blk_comp);

        /* Vertical Defect Correction if needed */
        if (ccdc_config_vdfc(&config_params->vertical_dft) < 0)
                return -EFAULT;

        /* color space conversion */
        ccdc_config_csc(&config_params->csc);

        /* color pattern */
        ccdc_config_color_patterns(&config_params->col_pat_field0,
                                   &config_params->col_pat_field1);

        /* Configure the Gain  & offset control */
        ccdc_config_gain_offset();

        dev_dbg(ccdc_cfg.dev, "\nWriting %x to COLPTN...\n", val);

        /* Configure DATAOFST  register */
        val = (config_params->data_offset.horz_offset & CCDC_DATAOFST_MASK) <<
                CCDC_DATAOFST_H_SHIFT;
        val |= (config_params->data_offset.vert_offset & CCDC_DATAOFST_MASK) <<
                CCDC_DATAOFST_V_SHIFT;
        regw(val, DATAOFST);

        /* configuring HSIZE register */
        val = (params->horz_flip_enable & CCDC_HSIZE_FLIP_MASK) <<
                CCDC_HSIZE_FLIP_SHIFT;

        /* If pack 8 is enable then 1 pixel will take 1 byte */
        if ((config_params->data_sz == CCDC_DATA_8BITS) ||
             config_params->alaw.enable) {
                val |= (((params->win.width) + 31) >> 5) &
                        CCDC_HSIZE_VAL_MASK;

                /* adjust to multiple of 32 */
                dev_dbg(ccdc_cfg.dev, "\nWriting 0x%x to HSIZE...\n",
                       (((params->win.width) + 31) >> 5) &
                        CCDC_HSIZE_VAL_MASK);
        } else {
                /* else one pixel will take 2 byte */
                val |= (((params->win.width * 2) + 31) >> 5) &
                        CCDC_HSIZE_VAL_MASK;

                dev_dbg(ccdc_cfg.dev, "\nWriting 0x%x to HSIZE...\n",
                       (((params->win.width * 2) + 31) >> 5) &
                        CCDC_HSIZE_VAL_MASK);
        }
        regw(val, HSIZE);

        /* Configure SDOFST register */
        if (params->frm_fmt == CCDC_FRMFMT_INTERLACED) {
                if (params->image_invert_enable) {
                        /* For interlace inverse mode */
                        regw(CCDC_SDOFST_INTERLACE_INVERSE, SDOFST);
                        dev_dbg(ccdc_cfg.dev, "\nWriting %x to SDOFST...\n",
                                CCDC_SDOFST_INTERLACE_INVERSE);
                } else {
                        /* For interlace non inverse mode */
                        regw(CCDC_SDOFST_INTERLACE_NORMAL, SDOFST);
                        dev_dbg(ccdc_cfg.dev, "\nWriting %x to SDOFST...\n",
                                CCDC_SDOFST_INTERLACE_NORMAL);
                }
        } else if (params->frm_fmt == CCDC_FRMFMT_PROGRESSIVE) {
                if (params->image_invert_enable) {
                        /* For progessive inverse mode */
                        regw(CCDC_SDOFST_PROGRESSIVE_INVERSE, SDOFST);
                        dev_dbg(ccdc_cfg.dev, "\nWriting %x to SDOFST...\n",
                                CCDC_SDOFST_PROGRESSIVE_INVERSE);
                } else {
                        /* For progessive non inverse mode */
                        regw(CCDC_SDOFST_PROGRESSIVE_NORMAL, SDOFST);
                        dev_dbg(ccdc_cfg.dev, "\nWriting %x to SDOFST...\n",
                                CCDC_SDOFST_PROGRESSIVE_NORMAL);
                }
        }
        dev_dbg(ccdc_cfg.dev, "\nend of ccdc_config_raw...");
        return 0;
}

static int ccdc_configure(void)
{
        if (ccdc_cfg.if_type == VPFE_RAW_BAYER)
                return ccdc_config_raw();
        else
                ccdc_config_ycbcr();
        return 0;
}

static int ccdc_set_buftype(enum ccdc_buftype buf_type)
{
        if (ccdc_cfg.if_type == VPFE_RAW_BAYER)
                ccdc_cfg.bayer.buf_type = buf_type;
        else
                ccdc_cfg.ycbcr.buf_type = buf_type;
        return 0;
}
static enum ccdc_buftype ccdc_get_buftype(void)
{
        if (ccdc_cfg.if_type == VPFE_RAW_BAYER)
                return ccdc_cfg.bayer.buf_type;
        return ccdc_cfg.ycbcr.buf_type;
}

static int ccdc_enum_pix(u32 *pix, int i)
{
        int ret = -EINVAL;
        if (ccdc_cfg.if_type == VPFE_RAW_BAYER) {
                if (i < ARRAY_SIZE(ccdc_raw_bayer_pix_formats)) {
                        *pix = ccdc_raw_bayer_pix_formats[i];
                        ret = 0;
                }
        } else {
                if (i < ARRAY_SIZE(ccdc_raw_yuv_pix_formats)) {
                        *pix = ccdc_raw_yuv_pix_formats[i];
                        ret = 0;
                }
        }
        return ret;
}

static int ccdc_set_pixel_format(u32 pixfmt)
{
        struct ccdc_a_law *alaw = &ccdc_cfg.bayer.config_params.alaw;

        if (ccdc_cfg.if_type == VPFE_RAW_BAYER) {
                ccdc_cfg.bayer.pix_fmt = CCDC_PIXFMT_RAW;
                if (pixfmt == V4L2_PIX_FMT_SBGGR8)
                        alaw->enable = 1;
                else if (pixfmt != V4L2_PIX_FMT_SBGGR16)
                        return -EINVAL;
        } else {
                if (pixfmt == V4L2_PIX_FMT_YUYV)
                        ccdc_cfg.ycbcr.pix_order = CCDC_PIXORDER_YCBYCR;
                else if (pixfmt == V4L2_PIX_FMT_UYVY)
                        ccdc_cfg.ycbcr.pix_order = CCDC_PIXORDER_CBYCRY;
                else
                        return -EINVAL;
        }
        return 0;
}
static u32 ccdc_get_pixel_format(void)
{
        struct ccdc_a_law *alaw = &ccdc_cfg.bayer.config_params.alaw;
        u32 pixfmt;

        if (ccdc_cfg.if_type == VPFE_RAW_BAYER)
                if (alaw->enable)
                        pixfmt = V4L2_PIX_FMT_SBGGR8;
                else
                        pixfmt = V4L2_PIX_FMT_SBGGR16;
        else {
                if (ccdc_cfg.ycbcr.pix_order == CCDC_PIXORDER_YCBYCR)
                        pixfmt = V4L2_PIX_FMT_YUYV;
                else
                        pixfmt = V4L2_PIX_FMT_UYVY;
        }
        return pixfmt;
}
static int ccdc_set_image_window(struct v4l2_rect *win)
{
        if (ccdc_cfg.if_type == VPFE_RAW_BAYER)
                ccdc_cfg.bayer.win = *win;
        else
                ccdc_cfg.ycbcr.win = *win;
        return 0;
}

static void ccdc_get_image_window(struct v4l2_rect *win)
{
        if (ccdc_cfg.if_type == VPFE_RAW_BAYER)
                *win = ccdc_cfg.bayer.win;
        else
                *win = ccdc_cfg.ycbcr.win;
}

static unsigned int ccdc_get_line_length(void)
{
        struct ccdc_config_params_raw *config_params =
                                &ccdc_cfg.bayer.config_params;
        unsigned int len;

        if (ccdc_cfg.if_type == VPFE_RAW_BAYER) {
                if ((config_params->alaw.enable) ||
                    (config_params->data_sz == CCDC_DATA_8BITS))
                        len = ccdc_cfg.bayer.win.width;
                else
                        len = ccdc_cfg.bayer.win.width * 2;
        } else
                len = ccdc_cfg.ycbcr.win.width * 2;
        return ALIGN(len, 32);
}

static int ccdc_set_frame_format(enum ccdc_frmfmt frm_fmt)
{
        if (ccdc_cfg.if_type == VPFE_RAW_BAYER)
                ccdc_cfg.bayer.frm_fmt = frm_fmt;
        else
                ccdc_cfg.ycbcr.frm_fmt = frm_fmt;
        return 0;
}

static enum ccdc_frmfmt ccdc_get_frame_format(void)
{
        if (ccdc_cfg.if_type == VPFE_RAW_BAYER)
                return ccdc_cfg.bayer.frm_fmt;
        else
                return ccdc_cfg.ycbcr.frm_fmt;
}

static int ccdc_getfid(void)
{
        return  (regr(MODESET) >> 15) & 1;
}

/* misc operations */
static inline void ccdc_setfbaddr(unsigned long addr)
{
        regw((addr >> 21) & 0x007f, STADRH);
        regw((addr >> 5) & 0x0ffff, STADRL);
}

static int ccdc_set_hw_if_params(struct vpfe_hw_if_param *params)
{
        ccdc_cfg.if_type = params->if_type;

        switch (params->if_type) {
        case VPFE_BT656:
        case VPFE_YCBCR_SYNC_16:
        case VPFE_YCBCR_SYNC_8:
                ccdc_cfg.ycbcr.vd_pol = params->vdpol;
                ccdc_cfg.ycbcr.hd_pol = params->hdpol;
                break;
        default:
                /* TODO add support for raw bayer here */
                return -EINVAL;
        }
        return 0;
}

static struct ccdc_hw_device ccdc_hw_dev = {
        .name = "DM355 CCDC",
        .owner = THIS_MODULE,
        .hw_ops = {
                .open = ccdc_open,
                .close = ccdc_close,
                .enable = ccdc_enable,
                .enable_out_to_sdram = ccdc_enable_output_to_sdram,
                .set_hw_if_params = ccdc_set_hw_if_params,
                .set_params = ccdc_set_params,
                .configure = ccdc_configure,
                .set_buftype = ccdc_set_buftype,
                .get_buftype = ccdc_get_buftype,
                .enum_pix = ccdc_enum_pix,
                .set_pixel_format = ccdc_set_pixel_format,
                .get_pixel_format = ccdc_get_pixel_format,
                .set_frame_format = ccdc_set_frame_format,
                .get_frame_format = ccdc_get_frame_format,
                .set_image_window = ccdc_set_image_window,
                .get_image_window = ccdc_get_image_window,
                .get_line_length = ccdc_get_line_length,
                .setfbaddr = ccdc_setfbaddr,
                .getfid = ccdc_getfid,
        },
};

static int dm355_ccdc_probe(struct platform_device *pdev)
{
        void (*setup_pinmux)(void);
        struct resource *res;
        int status = 0;

        /*
         * first try to register with vpfe. If not correct platform, then we
         * don't have to iomap
         */
        status = vpfe_register_ccdc_device(&ccdc_hw_dev);
        if (status < 0)
                return status;

        res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
        if (!res) {
                status = -ENODEV;
                goto fail_nores;
        }

        res = request_mem_region(res->start, resource_size(res), res->name);
        if (!res) {
                status = -EBUSY;
                goto fail_nores;
        }

        ccdc_cfg.base_addr = ioremap_nocache(res->start, resource_size(res));
        if (!ccdc_cfg.base_addr) {
                status = -ENOMEM;
                goto fail_nomem;
        }

        /* Platform data holds setup_pinmux function ptr */
        if (NULL == pdev->dev.platform_data) {
                status = -ENODEV;
                goto fail_nomap;
        }
        setup_pinmux = pdev->dev.platform_data;

        /*
         * setup Mux configuration for ccdc which may be different for
         * different SoCs using this CCDC
         */
        setup_pinmux();
        ccdc_cfg.dev = &pdev->dev;
        printk(KERN_NOTICE "%s is registered with vpfe.\n", ccdc_hw_dev.name);
        return 0;
fail_nomap:
        iounmap(ccdc_cfg.base_addr);
fail_nomem:
        release_mem_region(res->start, resource_size(res));
fail_nores:
        vpfe_unregister_ccdc_device(&ccdc_hw_dev);
        return status;
}

static int dm355_ccdc_remove(struct platform_device *pdev)
{
        struct resource *res;

        iounmap(ccdc_cfg.base_addr);
        res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
        if (res)
                release_mem_region(res->start, resource_size(res));
        vpfe_unregister_ccdc_device(&ccdc_hw_dev);
        return 0;
}

static struct platform_driver dm355_ccdc_driver = {
        .driver = {
                .name   = "dm355_ccdc",
                .owner = THIS_MODULE,
        },
        .remove = dm355_ccdc_remove,
        .probe = dm355_ccdc_probe,
};

module_platform_driver(dm355_ccdc_driver);