// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * Copyright (C) 2008-2009 Texas Instruments Inc
 *
 * Image Sensor Interface (ISIF) driver
 *
 * This driver is for configuring the ISIF IP available on DM365 or any other
 * TI SoCs. This is used for capturing yuv or bayer video or image data
 * from a decoder or sensor. This IP is similar to the CCDC IP on DM355
 * and DM6446, but with enhanced or additional ip blocks. The driver
 * configures the ISIF upon commands from the vpfe bridge driver through
 * ccdc_hw_device interface.
 *
 * TODO: 1) Raw bayer parameter settings and bayer capture
 *       2) Add support for control ioctl
 */
#include <linux/delay.h>
#include <linux/platform_device.h>
#include <linux/uaccess.h>
#include <linux/io.h>
#include <linux/videodev2.h>
#include <linux/err.h>
#include <linux/module.h>

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

#include "isif_regs.h"
#include "ccdc_hw_device.h"

/* Defaults for module configuration parameters */
static const struct isif_config_params_raw isif_config_defaults = {
        .linearize = {
                .en = 0,
                .corr_shft = ISIF_NO_SHIFT,
                .scale_fact = {1, 0},
        },
        .df_csc = {
                .df_or_csc = 0,
                .csc = {
                        .en = 0,
                },
        },
        .dfc = {
                .en = 0,
        },
        .bclamp = {
                .en = 0,
        },
        .gain_offset = {
                .gain = {
                        .r_ye = {1, 0},
                        .gr_cy = {1, 0},
                        .gb_g = {1, 0},
                        .b_mg = {1, 0},
                },
        },
        .culling = {
                .hcpat_odd = 0xff,
                .hcpat_even = 0xff,
                .vcpat = 0xff,
        },
        .compress = {
                .alg = ISIF_ALAW,
        },
};

/* ISIF operation configuration */
static struct isif_oper_config {
        struct device *dev;
        enum vpfe_hw_if_type if_type;
        struct isif_ycbcr_config ycbcr;
        struct isif_params_raw bayer;
        enum isif_data_pack data_pack;
        /* ISIF base address */
        void __iomem *base_addr;
        /* ISIF Linear Table 0 */
        void __iomem *linear_tbl0_addr;
        /* ISIF Linear Table 1 */
        void __iomem *linear_tbl1_addr;
} isif_cfg = {
        .ycbcr = {
                .pix_fmt = CCDC_PIXFMT_YCBCR_8BIT,
                .frm_fmt = CCDC_FRMFMT_INTERLACED,
                .win = ISIF_WIN_NTSC,
                .fid_pol = VPFE_PINPOL_POSITIVE,
                .vd_pol = VPFE_PINPOL_POSITIVE,
                .hd_pol = VPFE_PINPOL_POSITIVE,
                .pix_order = CCDC_PIXORDER_CBYCRY,
                .buf_type = CCDC_BUFTYPE_FLD_INTERLEAVED,
        },
        .bayer = {
                .pix_fmt = CCDC_PIXFMT_RAW,
                .frm_fmt = CCDC_FRMFMT_PROGRESSIVE,
                .win = ISIF_WIN_VGA,
                .fid_pol = VPFE_PINPOL_POSITIVE,
                .vd_pol = VPFE_PINPOL_POSITIVE,
                .hd_pol = VPFE_PINPOL_POSITIVE,
                .gain = {
                        .r_ye = {1, 0},
                        .gr_cy = {1, 0},
                        .gb_g = {1, 0},
                        .b_mg = {1, 0},
                },
                .cfa_pat = ISIF_CFA_PAT_MOSAIC,
                .data_msb = ISIF_BIT_MSB_11,
                .config_params = {
                        .data_shift = ISIF_NO_SHIFT,
                        .col_pat_field0 = {
                                .olop = ISIF_GREEN_BLUE,
                                .olep = ISIF_BLUE,
                                .elop = ISIF_RED,
                                .elep = ISIF_GREEN_RED,
                        },
                        .col_pat_field1 = {
                                .olop = ISIF_GREEN_BLUE,
                                .olep = ISIF_BLUE,
                                .elop = ISIF_RED,
                                .elep = ISIF_GREEN_RED,
                        },
                        .test_pat_gen = 0,
                },
        },
        .data_pack = ISIF_DATA_PACK8,
};

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

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

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

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

/* reg_modify() - read, modify and write register */
static inline u32 reg_modify(u32 mask, u32 val, u32 offset)
{
        u32 new_val = (regr(offset) & ~mask) | (val & mask);

        regw(new_val, offset);
        return new_val;
}

static inline void regw_lin_tbl(u32 val, u32 offset, int i)
{
        if (!i)
                __raw_writel(val, isif_cfg.linear_tbl0_addr + offset);
        else
                __raw_writel(val, isif_cfg.linear_tbl1_addr + offset);
}

static void isif_disable_all_modules(void)
{
        /* disable BC */
        regw(0, CLAMPCFG);
        /* disable vdfc */
        regw(0, DFCCTL);
        /* disable CSC */
        regw(0, CSCCTL);
        /* disable linearization */
        regw(0, LINCFG0);
        /* disable other modules here as they are supported */
}

static void isif_enable(int en)
{
        if (!en) {
                /* Before disable isif, disable all ISIF modules */
                isif_disable_all_modules();
                /*
                 * wait for next VD. Assume lowest scan rate is 12 Hz. So
                 * 100 msec delay is good enough
                 */
                msleep(100);
        }
        reg_modify(ISIF_SYNCEN_VDHDEN_MASK, en, SYNCEN);
}

static void isif_enable_output_to_sdram(int en)
{
        reg_modify(ISIF_SYNCEN_WEN_MASK, en << ISIF_SYNCEN_WEN_SHIFT, SYNCEN);
}

static void isif_config_culling(struct isif_cul *cul)
{
        u32 val;

        /* Horizontal pattern */
        val = (cul->hcpat_even << CULL_PAT_EVEN_LINE_SHIFT) | cul->hcpat_odd;
        regw(val, CULH);

        /* vertical pattern */
        regw(cul->vcpat, CULV);

        /* LPF */
        reg_modify(ISIF_LPF_MASK << ISIF_LPF_SHIFT,
                  cul->en_lpf << ISIF_LPF_SHIFT, MODESET);
}

static void isif_config_gain_offset(void)
{
        struct isif_gain_offsets_adj *gain_off_p =
                &isif_cfg.bayer.config_params.gain_offset;
        u32 val;

        val = (!!gain_off_p->gain_sdram_en << GAIN_SDRAM_EN_SHIFT) |
              (!!gain_off_p->gain_ipipe_en << GAIN_IPIPE_EN_SHIFT) |
              (!!gain_off_p->gain_h3a_en << GAIN_H3A_EN_SHIFT) |
              (!!gain_off_p->offset_sdram_en << OFST_SDRAM_EN_SHIFT) |
              (!!gain_off_p->offset_ipipe_en << OFST_IPIPE_EN_SHIFT) |
              (!!gain_off_p->offset_h3a_en << OFST_H3A_EN_SHIFT);

        reg_modify(GAIN_OFFSET_EN_MASK, val, CGAMMAWD);

        val = (gain_off_p->gain.r_ye.integer << GAIN_INTEGER_SHIFT) |
               gain_off_p->gain.r_ye.decimal;
        regw(val, CRGAIN);

        val = (gain_off_p->gain.gr_cy.integer << GAIN_INTEGER_SHIFT) |
               gain_off_p->gain.gr_cy.decimal;
        regw(val, CGRGAIN);

        val = (gain_off_p->gain.gb_g.integer << GAIN_INTEGER_SHIFT) |
               gain_off_p->gain.gb_g.decimal;
        regw(val, CGBGAIN);

        val = (gain_off_p->gain.b_mg.integer << GAIN_INTEGER_SHIFT) |
               gain_off_p->gain.b_mg.decimal;
        regw(val, CBGAIN);

        regw(gain_off_p->offset, COFSTA);
}

static void isif_restore_defaults(void)
{
        enum vpss_ccdc_source_sel source = VPSS_CCDCIN;

        dev_dbg(isif_cfg.dev, "\nstarting isif_restore_defaults...");
        isif_cfg.bayer.config_params = isif_config_defaults;
        /* 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 default offset and gain */
        isif_config_gain_offset();
        vpss_select_ccdc_source(source);
        dev_dbg(isif_cfg.dev, "\nEnd of isif_restore_defaults...");
}

static int isif_open(struct device *device)
{
        isif_restore_defaults();
        return 0;
}

/* This function will configure the window size to be capture in ISIF reg */
static void isif_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(isif_cfg.dev, "\nStarting isif_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 & START_PX_HOR_MASK, SPH);
        regw(horz_nr_pixels & NUM_PX_HOR_MASK, LNH);
        vert_start = image_win->top;

        if (frm_fmt == CCDC_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);
                regw(mid_img, VDINT1);
        }

        regw(0, VDINT0);
        regw(vert_start & START_VER_ONE_MASK, SLV0);
        regw(vert_start & START_VER_TWO_MASK, SLV1);
        regw(vert_nr_lines & NUM_LINES_VER, LNV);
}

static void isif_config_bclamp(struct isif_black_clamp *bc)
{
        u32 val;

        /*
         * DC Offset is always added to image data irrespective of bc enable
         * status
         */
        regw(bc->dc_offset, CLDCOFST);

        if (bc->en) {
                val = bc->bc_mode_color << ISIF_BC_MODE_COLOR_SHIFT;

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

                regw(val, CLAMPCFG);

                if (bc->horz.mode != 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 |
                              ((!!bc->horz.base_win_sel_calc) <<
                                ISIF_HORZ_BC_WIN_SEL_SHIFT) |
                              ((!!bc->horz.clamp_pix_limit) <<
                                ISIF_HORZ_BC_PIX_LIMIT_SHIFT) |
                              (bc->horz.win_h_sz_calc <<
                                ISIF_HORZ_BC_WIN_H_SIZE_SHIFT) |
                              (bc->horz.win_v_sz_calc <<
                                ISIF_HORZ_BC_WIN_V_SIZE_SHIFT);
                        regw(val, CLHWIN0);

                        regw(bc->horz.win_start_h_calc, CLHWIN1);
                        regw(bc->horz.win_start_v_calc, CLHWIN2);
                }

                /* vertical clamp calculation parameters */

                /* Reset clamp value sel for previous line */
                val |=
                (bc->vert.reset_val_sel << ISIF_VERT_BC_RST_VAL_SEL_SHIFT) |
                (bc->vert.line_ave_coef << ISIF_VERT_BC_LINE_AVE_COEF_SHIFT);
                regw(val, CLVWIN0);

                /* Optical Black horizontal start position */
                regw(bc->vert.ob_start_h, CLVWIN1);
                /* Optical Black vertical start position */
                regw(bc->vert.ob_start_v, CLVWIN2);
                /* Optical Black vertical size for calculation */
                regw(bc->vert.ob_v_sz_calc, CLVWIN3);
                /* Vertical start position for BC subtraction */
                regw(bc->vert_start_sub, CLSV);
        }
}

static void isif_config_linearization(struct isif_linearize *linearize)
{
        u32 val, i;

        if (!linearize->en) {
                regw(0, LINCFG0);
                return;
        }

        /* shift value for correction & enable linearization (set lsb) */
        val = (linearize->corr_shft << ISIF_LIN_CORRSFT_SHIFT) | 1;
        regw(val, LINCFG0);

        /* Scale factor */
        val = ((!!linearize->scale_fact.integer) <<
               ISIF_LIN_SCALE_FACT_INTEG_SHIFT) |
               linearize->scale_fact.decimal;
        regw(val, LINCFG1);

        for (i = 0; i < ISIF_LINEAR_TAB_SIZE; i++) {
                if (i % 2)
                        regw_lin_tbl(linearize->table[i], ((i >> 1) << 2), 1);
                else
                        regw_lin_tbl(linearize->table[i], ((i >> 1) << 2), 0);
        }
}

static int isif_config_dfc(struct isif_dfc *vdfc)
{
        /* initialize retries to loop for max ~ 250 usec */
        u32 val, count, retries = loops_per_jiffy / (4000/HZ);
        int i;

        if (!vdfc->en)
                return 0;

        /* Correction mode */
        val = (vdfc->corr_mode << 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_SHIFT;

        regw(val, DFCCTL);

        /* Defect saturation level */
        regw(vdfc->def_sat_level, VDFSATLV);

        regw(vdfc->table[0].pos_vert, DFCMEM0);
        regw(vdfc->table[0].pos_horz, DFCMEM1);
        if (vdfc->corr_mode == ISIF_VDFC_NORMAL ||
            vdfc->corr_mode == ISIF_VDFC_HORZ_INTERPOL_IF_SAT) {
                regw(vdfc->table[0].level_at_pos, DFCMEM2);
                regw(vdfc->table[0].level_up_pixels, DFCMEM3);
                regw(vdfc->table[0].level_low_pixels, DFCMEM4);
        }

        /* set DFCMARST and set DFCMWR */
        val = regr(DFCMEMCTL) | (1 << ISIF_DFCMEMCTL_DFCMARST_SHIFT) | 1;
        regw(val, DFCMEMCTL);

        count = retries;
        while (count && (regr(DFCMEMCTL) & 0x1))
                count--;

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

        for (i = 1; i < vdfc->num_vdefects; i++) {
                regw(vdfc->table[i].pos_vert, DFCMEM0);
                regw(vdfc->table[i].pos_horz, DFCMEM1);
                if (vdfc->corr_mode == ISIF_VDFC_NORMAL ||
                    vdfc->corr_mode == ISIF_VDFC_HORZ_INTERPOL_IF_SAT) {
                        regw(vdfc->table[i].level_at_pos, DFCMEM2);
                        regw(vdfc->table[i].level_up_pixels, DFCMEM3);
                        regw(vdfc->table[i].level_low_pixels, DFCMEM4);
                }
                val = regr(DFCMEMCTL);
                /* clear DFCMARST and set DFCMWR */
                val &= ~BIT(ISIF_DFCMEMCTL_DFCMARST_SHIFT);
                val |= 1;
                regw(val, DFCMEMCTL);

                count = retries;
                while (count && (regr(DFCMEMCTL) & 0x1))
                        count--;

                if (!count) {
                        dev_err(isif_cfg.dev,
                                "defect table write timeout !!!\n");
                        return -1;
                }
        }
        if (vdfc->num_vdefects < ISIF_VDFC_TABLE_SIZE) {
                /* Extra cycle needed */
                regw(0, DFCMEM0);
                regw(0x1FFF, DFCMEM1);
                regw(1, DFCMEMCTL);
        }

        /* enable VDFC */
        reg_modify((1 << ISIF_VDFC_EN_SHIFT), (1 << ISIF_VDFC_EN_SHIFT),
                   DFCCTL);
        return 0;
}

static void isif_config_csc(struct isif_df_csc *df_csc)
{
        u32 val1 = 0, val2 = 0, i;

        if (!df_csc->csc.en) {
                regw(0, CSCCTL);
                return;
        }
        for (i = 0; i < ISIF_CSC_NUM_COEFF; i++) {
                if ((i % 2) == 0) {
                        /* CSCM - LSB */
                        val1 = (df_csc->csc.coeff[i].integer <<
                                ISIF_CSC_COEF_INTEG_SHIFT) |
                                df_csc->csc.coeff[i].decimal;
                } else {

                        /* CSCM - MSB */
                        val2 = (df_csc->csc.coeff[i].integer <<
                                ISIF_CSC_COEF_INTEG_SHIFT) |
                                df_csc->csc.coeff[i].decimal;
                        val2 <<= ISIF_CSCM_MSB_SHIFT;
                        val2 |= val1;
                        regw(val2, (CSCM0 + ((i - 1) << 1)));
                }
        }

        /* program the active area */
        regw(df_csc->start_pix, 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
         */
        regw(df_csc->num_pixels, FMTLNH);
        regw(df_csc->start_line, FMTSLV);
        /*
         * one extra line as required for CSC. See reason documented for
         * num_pixels
         */
        regw(df_csc->num_lines, FMTLNV);

        /* Enable CSC */
        regw(1, CSCCTL);
}

static int isif_config_raw(void)
{
        struct isif_params_raw *params = &isif_cfg.bayer;
        struct isif_config_params_raw *module_params =
                &isif_cfg.bayer.config_params;
        struct vpss_pg_frame_size frame_size;
        struct vpss_sync_pol sync;
        u32 val;

        dev_dbg(isif_cfg.dev, "\nStarting isif_config_raw..\n");

        /*
         * 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_cfg.data_pack;

        dev_dbg(isif_cfg.dev, "Writing 0x%x to ...CCDCFG \n", val);
        regw(val, CCDCFG);

        /*
         * 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_SHIFT) |
                (params->hd_pol << ISIF_HD_POL_SHIFT) |
                (params->fid_pol << ISIF_FID_POL_SHIFT) |
                (ISIF_DATAPOL_NORMAL << ISIF_DATAPOL_SHIFT) |
                (ISIF_EXWEN_DISABLE << ISIF_EXWEN_SHIFT) |
                (params->frm_fmt << ISIF_FRM_FMT_SHIFT) |
                (params->pix_fmt << ISIF_INPUT_SHIFT) |
                (params->config_params.data_shift << ISIF_DATASFT_SHIFT);

        regw(val, MODESET);
        dev_dbg(isif_cfg.dev, "Writing 0x%x to MODESET...\n", val);

        /*
         * Configure GAMMAWD register
         * CFA pattern setting
         */
        val = params->cfa_pat << ISIF_GAMMAWD_CFA_SHIFT;

        /* Gamma msb */
        if (module_params->compress.alg == ISIF_ALAW)
                val |= ISIF_ALAW_ENABLE;

        val |= (params->data_msb << ISIF_ALAW_GAMMA_WD_SHIFT);
        regw(val, CGAMMAWD);

        /* Configure DPCM compression settings */
        if (module_params->compress.alg == ISIF_DPCM) {
                val =  BIT(ISIF_DPCM_EN_SHIFT) |
                       (module_params->compress.pred <<
                       ISIF_DPCM_PREDICTOR_SHIFT);
        }

        regw(val, MISC);

        /* Configure Gain & Offset */
        isif_config_gain_offset();

        /* Configure Color pattern */
        val = (params->config_params.col_pat_field0.olop) |
              (params->config_params.col_pat_field0.olep << 2) |
              (params->config_params.col_pat_field0.elop << 4) |
              (params->config_params.col_pat_field0.elep << 6) |
              (params->config_params.col_pat_field1.olop << 8) |
              (params->config_params.col_pat_field1.olep << 10) |
              (params->config_params.col_pat_field1.elop << 12) |
              (params->config_params.col_pat_field1.elep << 14);
        regw(val, CCOLP);
        dev_dbg(isif_cfg.dev, "Writing %x to CCOLP ...\n", val);

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

        /* calculate line offset in 32 bytes based on pack value */
        if (isif_cfg.data_pack == ISIF_PACK_8BIT)
                val |= ((params->win.width + 31) >> 5);
        else if (isif_cfg.data_pack == ISIF_PACK_12BIT)
                val |= (((params->win.width +
                       (params->win.width >> 2)) + 31) >> 5);
        else
                val |= (((params->win.width * 2) + 31) >> 5);
        regw(val, HSIZE);

        /* Configure SDOFST register  */
        if (params->frm_fmt == CCDC_FRMFMT_INTERLACED) {
                if (params->image_invert_en) {
                        /* For interlace inverse mode */
                        regw(0x4B6D, SDOFST);
                        dev_dbg(isif_cfg.dev, "Writing 0x4B6D to SDOFST...\n");
                } else {
                        /* For interlace non inverse mode */
                        regw(0x0B6D, SDOFST);
                        dev_dbg(isif_cfg.dev, "Writing 0x0B6D to SDOFST...\n");
                }
        } else if (params->frm_fmt == CCDC_FRMFMT_PROGRESSIVE) {
                if (params->image_invert_en) {
                        /* For progressive inverse mode */
                        regw(0x4000, SDOFST);
                        dev_dbg(isif_cfg.dev, "Writing 0x4000 to SDOFST...\n");
                } else {
                        /* For progressive non inverse mode */
                        regw(0x0000, SDOFST);
                        dev_dbg(isif_cfg.dev, "Writing 0x0000 to SDOFST...\n");
                }
        }

        /* Configure video window */
        isif_setwin(&params->win, params->frm_fmt, 1);

        /* Configure Black Clamp */
        isif_config_bclamp(&module_params->bclamp);

        /* Configure Vertical Defection Pixel Correction */
        if (isif_config_dfc(&module_params->dfc) < 0)
                return -EFAULT;

        if (!module_params->df_csc.df_or_csc)
                /* Configure Color Space Conversion */
                isif_config_csc(&module_params->df_csc);

        isif_config_linearization(&module_params->linearize);

        /* Configure Culling */
        isif_config_culling(&module_params->culling);

        /* Configure horizontal and vertical offsets(DFC,LSC,Gain) */
        regw(module_params->horz_offset, DATAHOFST);
        regw(module_params->vert_offset, DATAVOFST);

        /* Setup test pattern if enabled */
        if (params->config_params.test_pat_gen) {
                /* Use the HD/VD pol settings from user */
                sync.ccdpg_hdpol = params->hd_pol;
                sync.ccdpg_vdpol = params->vd_pol;
                dm365_vpss_set_sync_pol(sync);
                frame_size.hlpfr = isif_cfg.bayer.win.width;
                frame_size.pplen = isif_cfg.bayer.win.height;
                dm365_vpss_set_pg_frame_size(frame_size);
                vpss_select_ccdc_source(VPSS_PGLPBK);
        }

        dev_dbg(isif_cfg.dev, "\nEnd of isif_config_ycbcr...\n");
        return 0;
}

static int isif_set_buftype(enum ccdc_buftype buf_type)
{
        if (isif_cfg.if_type == VPFE_RAW_BAYER)
                isif_cfg.bayer.buf_type = buf_type;
        else
                isif_cfg.ycbcr.buf_type = buf_type;

        return 0;

}
static enum ccdc_buftype isif_get_buftype(void)
{
        if (isif_cfg.if_type == VPFE_RAW_BAYER)
                return isif_cfg.bayer.buf_type;

        return isif_cfg.ycbcr.buf_type;
}

static int isif_enum_pix(u32 *pix, int i)
{
        int ret = -EINVAL;

        if (isif_cfg.if_type == VPFE_RAW_BAYER) {
                if (i < ARRAY_SIZE(isif_raw_bayer_pix_formats)) {
                        *pix = isif_raw_bayer_pix_formats[i];
                        ret = 0;
                }
        } else {
                if (i < ARRAY_SIZE(isif_raw_yuv_pix_formats)) {
                        *pix = isif_raw_yuv_pix_formats[i];
                        ret = 0;
                }
        }

        return ret;
}

static int isif_set_pixel_format(unsigned int pixfmt)
{
        if (isif_cfg.if_type == VPFE_RAW_BAYER) {
                if (pixfmt == V4L2_PIX_FMT_SBGGR8) {
                        if ((isif_cfg.bayer.config_params.compress.alg !=
                             ISIF_ALAW) &&
                            (isif_cfg.bayer.config_params.compress.alg !=
                             ISIF_DPCM)) {
                                dev_dbg(isif_cfg.dev,
                                        "Either configure A-Law or DPCM\n");
                                return -EINVAL;
                        }
                        isif_cfg.data_pack = ISIF_PACK_8BIT;
                } else if (pixfmt == V4L2_PIX_FMT_SBGGR16) {
                        isif_cfg.bayer.config_params.compress.alg =
                                        ISIF_NO_COMPRESSION;
                        isif_cfg.data_pack = ISIF_PACK_16BIT;
                } else
                        return -EINVAL;
                isif_cfg.bayer.pix_fmt = CCDC_PIXFMT_RAW;
        } else {
                if (pixfmt == V4L2_PIX_FMT_YUYV)
                        isif_cfg.ycbcr.pix_order = CCDC_PIXORDER_YCBYCR;
                else if (pixfmt == V4L2_PIX_FMT_UYVY)
                        isif_cfg.ycbcr.pix_order = CCDC_PIXORDER_CBYCRY;
                else
                        return -EINVAL;
                isif_cfg.data_pack = ISIF_PACK_8BIT;
        }
        return 0;
}

static u32 isif_get_pixel_format(void)
{
        u32 pixfmt;

        if (isif_cfg.if_type == VPFE_RAW_BAYER)
                if (isif_cfg.bayer.config_params.compress.alg == ISIF_ALAW ||
                    isif_cfg.bayer.config_params.compress.alg == ISIF_DPCM)
                        pixfmt = V4L2_PIX_FMT_SBGGR8;
                else
                        pixfmt = V4L2_PIX_FMT_SBGGR16;
        else {
                if (isif_cfg.ycbcr.pix_order == CCDC_PIXORDER_YCBYCR)
                        pixfmt = V4L2_PIX_FMT_YUYV;
                else
                        pixfmt = V4L2_PIX_FMT_UYVY;
        }
        return pixfmt;
}

static int isif_set_image_window(struct v4l2_rect *win)
{
        if (isif_cfg.if_type == VPFE_RAW_BAYER) {
                isif_cfg.bayer.win.top = win->top;
                isif_cfg.bayer.win.left = win->left;
                isif_cfg.bayer.win.width = win->width;
                isif_cfg.bayer.win.height = win->height;
        } else {
                isif_cfg.ycbcr.win.top = win->top;
                isif_cfg.ycbcr.win.left = win->left;
                isif_cfg.ycbcr.win.width = win->width;
                isif_cfg.ycbcr.win.height = win->height;
        }
        return 0;
}

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

static unsigned int isif_get_line_length(void)
{
        unsigned int len;

        if (isif_cfg.if_type == VPFE_RAW_BAYER) {
                if (isif_cfg.data_pack == ISIF_PACK_8BIT)
                        len = ((isif_cfg.bayer.win.width));
                else if (isif_cfg.data_pack == ISIF_PACK_12BIT)
                        len = (((isif_cfg.bayer.win.width * 2) +
                                 (isif_cfg.bayer.win.width >> 2)));
                else
                        len = (((isif_cfg.bayer.win.width * 2)));
        } else
                len = (((isif_cfg.ycbcr.win.width * 2)));
        return ALIGN(len, 32);
}

static int isif_set_frame_format(enum ccdc_frmfmt frm_fmt)
{
        if (isif_cfg.if_type == VPFE_RAW_BAYER)
                isif_cfg.bayer.frm_fmt = frm_fmt;
        else
                isif_cfg.ycbcr.frm_fmt = frm_fmt;
        return 0;
}
static enum ccdc_frmfmt isif_get_frame_format(void)
{
        if (isif_cfg.if_type == VPFE_RAW_BAYER)
                return isif_cfg.bayer.frm_fmt;
        return isif_cfg.ycbcr.frm_fmt;
}

static int isif_getfid(void)
{
        return (regr(MODESET) >> 15) & 0x1;
}

/* misc operations */
static void isif_setfbaddr(unsigned long addr)
{
        regw((addr >> 21) & 0x07ff, CADU);
        regw((addr >> 5) & 0x0ffff, CADL);
}

static int isif_set_hw_if_params(struct vpfe_hw_if_param *params)
{
        isif_cfg.if_type = params->if_type;

        switch (params->if_type) {
        case VPFE_BT656:
        case VPFE_BT656_10BIT:
        case VPFE_YCBCR_SYNC_8:
                isif_cfg.ycbcr.pix_fmt = CCDC_PIXFMT_YCBCR_8BIT;
                isif_cfg.ycbcr.pix_order = CCDC_PIXORDER_CBYCRY;
                break;
        case VPFE_BT1120:
        case VPFE_YCBCR_SYNC_16:
                isif_cfg.ycbcr.pix_fmt = CCDC_PIXFMT_YCBCR_16BIT;
                isif_cfg.ycbcr.pix_order = CCDC_PIXORDER_CBYCRY;
                break;
        case VPFE_RAW_BAYER:
                isif_cfg.bayer.pix_fmt = CCDC_PIXFMT_RAW;
                break;
        default:
                dev_dbg(isif_cfg.dev, "Invalid interface type\n");
                return -EINVAL;
        }

        return 0;
}

/* This function will configure ISIF for YCbCr parameters. */
static int isif_config_ycbcr(void)
{
        struct isif_ycbcr_config *params = &isif_cfg.ycbcr;
        u32 modeset = 0, ccdcfg = 0;

        dev_dbg(isif_cfg.dev, "\nStarting isif_config_ycbcr...");

        /* configure pixel format or input mode */
        modeset = modeset | (params->pix_fmt << ISIF_INPUT_SHIFT) |
                  (params->frm_fmt << ISIF_FRM_FMT_SHIFT) |
                  (params->fid_pol << ISIF_FID_POL_SHIFT) |
                  (params->hd_pol << ISIF_HD_POL_SHIFT) |
                  (params->vd_pol << ISIF_VD_POL_SHIFT);

        /* pack the data to 8-bit ISIFCFG */
        switch (isif_cfg.if_type) {
        case VPFE_BT656:
                if (params->pix_fmt != CCDC_PIXFMT_YCBCR_8BIT) {
                        dev_dbg(isif_cfg.dev, "Invalid pix_fmt(input mode)\n");
                        return -EINVAL;
                }
                modeset |= (VPFE_PINPOL_NEGATIVE << ISIF_VD_POL_SHIFT);
                regw(3, REC656IF);
                ccdcfg = ccdcfg | ISIF_DATA_PACK8 | ISIF_YCINSWP_YCBCR;
                break;
        case VPFE_BT656_10BIT:
                if (params->pix_fmt != CCDC_PIXFMT_YCBCR_8BIT) {
                        dev_dbg(isif_cfg.dev, "Invalid pix_fmt(input mode)\n");
                        return -EINVAL;
                }
                /* setup BT.656, embedded sync  */
                regw(3, REC656IF);
                /* enable 10 bit mode in ccdcfg */
                ccdcfg = ccdcfg | ISIF_DATA_PACK8 | ISIF_YCINSWP_YCBCR |
                        ISIF_BW656_ENABLE;
                break;
        case VPFE_BT1120:
                if (params->pix_fmt != CCDC_PIXFMT_YCBCR_16BIT) {
                        dev_dbg(isif_cfg.dev, "Invalid pix_fmt(input mode)\n");
                        return -EINVAL;
                }
                regw(3, REC656IF);
                break;

        case VPFE_YCBCR_SYNC_8:
                ccdcfg |= ISIF_DATA_PACK8;
                ccdcfg |= ISIF_YCINSWP_YCBCR;
                if (params->pix_fmt != CCDC_PIXFMT_YCBCR_8BIT) {
                        dev_dbg(isif_cfg.dev, "Invalid pix_fmt(input mode)\n");
                        return -EINVAL;
                }
                break;
        case VPFE_YCBCR_SYNC_16:
                if (params->pix_fmt != CCDC_PIXFMT_YCBCR_16BIT) {
                        dev_dbg(isif_cfg.dev, "Invalid pix_fmt(input mode)\n");
                        return -EINVAL;
                }
                break;
        default:
                /* should never come here */
                dev_dbg(isif_cfg.dev, "Invalid interface type\n");
                return -EINVAL;
        }

        regw(modeset, MODESET);

        /* Set up pix order */
        ccdcfg |= params->pix_order << ISIF_PIX_ORDER_SHIFT;

        regw(ccdcfg, CCDCFG);

        /* configure video window */
        if ((isif_cfg.if_type == VPFE_BT1120) ||
            (isif_cfg.if_type == VPFE_YCBCR_SYNC_16))
                isif_setwin(&params->win, params->frm_fmt, 1);
        else
                isif_setwin(&params->win, params->frm_fmt, 2);

        /*
         * 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) & 0xffffffe0) >> 5), HSIZE);

        /* configure the memory line offset */
        if ((params->frm_fmt == CCDC_FRMFMT_INTERLACED) &&
            (params->buf_type == CCDC_BUFTYPE_FLD_INTERLEAVED))
                /* two fields are interleaved in memory */
                regw(0x00000249, SDOFST);

        return 0;
}

static int isif_configure(void)
{
        if (isif_cfg.if_type == VPFE_RAW_BAYER)
                return isif_config_raw();
        return isif_config_ycbcr();
}

static int isif_close(struct device *device)
{
        /* copy defaults to module params */
        isif_cfg.bayer.config_params = isif_config_defaults;
        return 0;
}

static const struct ccdc_hw_device isif_hw_dev = {
        .name = "ISIF",
        .owner = THIS_MODULE,
        .hw_ops = {
                .open = isif_open,
                .close = isif_close,
                .enable = isif_enable,
                .enable_out_to_sdram = isif_enable_output_to_sdram,
                .set_hw_if_params = isif_set_hw_if_params,
                .configure = isif_configure,
                .set_buftype = isif_set_buftype,
                .get_buftype = isif_get_buftype,
                .enum_pix = isif_enum_pix,
                .set_pixel_format = isif_set_pixel_format,
                .get_pixel_format = isif_get_pixel_format,
                .set_frame_format = isif_set_frame_format,
                .get_frame_format = isif_get_frame_format,
                .set_image_window = isif_set_image_window,

                .get_image_window = isif_get_image_window,
                .get_line_length = isif_get_line_length,
                .setfbaddr = isif_setfbaddr,
                .getfid = isif_getfid,
        },
};

static int isif_probe(struct platform_device *pdev)
{
        void (*setup_pinmux)(void);
        struct resource *res;
        void __iomem *addr;
        int status = 0, i;

        /* Platform data holds setup_pinmux function ptr */
        if (!pdev->dev.platform_data)
                return -ENODEV;

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

        setup_pinmux = pdev->dev.platform_data;
        /*
         * setup Mux configuration for ccdc which may be different for
         * different SoCs using this CCDC
         */
        setup_pinmux();

        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 = -ENODEV;
                        goto fail_nobase_res;
                }
                res = request_mem_region(res->start, resource_size(res),
                                         res->name);
                if (!res) {
                        status = -EBUSY;
                        goto fail_nobase_res;
                }
                addr = ioremap(res->start, resource_size(res));
                if (!addr) {
                        status = -ENOMEM;
                        goto fail_base_iomap;
                }
                switch (i) {
                case 0:
                        /* ISIF base address */
                        isif_cfg.base_addr = addr;
                        break;
                case 1:
                        /* ISIF linear tbl0 address */
                        isif_cfg.linear_tbl0_addr = addr;
                        break;
                default:
                        /* ISIF linear tbl0 address */
                        isif_cfg.linear_tbl1_addr = addr;
                        break;
                }
                i++;
        }
        isif_cfg.dev = &pdev->dev;

        printk(KERN_NOTICE "%s is registered with vpfe.\n",
                isif_hw_dev.name);
        return 0;
fail_base_iomap:
        release_mem_region(res->start, resource_size(res));
        i--;
fail_nobase_res:
        if (isif_cfg.base_addr)
                iounmap(isif_cfg.base_addr);
        if (isif_cfg.linear_tbl0_addr)
                iounmap(isif_cfg.linear_tbl0_addr);

        while (i >= 0) {
                res = platform_get_resource(pdev, IORESOURCE_MEM, i);
                if (res)
                        release_mem_region(res->start, resource_size(res));
                i--;
        }
        vpfe_unregister_ccdc_device(&isif_hw_dev);
        return status;
}

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

        iounmap(isif_cfg.base_addr);
        iounmap(isif_cfg.linear_tbl0_addr);
        iounmap(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++;
        }
        vpfe_unregister_ccdc_device(&isif_hw_dev);
        return 0;
}

static struct platform_driver isif_driver = {
        .driver = {
                .name   = "isif",
        },
        .remove = isif_remove,
        .probe = isif_probe,
};

module_platform_driver(isif_driver);

MODULE_LICENSE("GPL");