scsi: qedf: Fix a potential NULL pointer dereference

[mirror_ubuntu-artful-kernel.git] / drivers / media / platform / davinci / dm644x_ccdc.c

/*
 * Copyright (C) 2006-2009 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.
 *
 * CCDC hardware module for DM6446
 * ------------------------------
 *
 * This module is for configuring CCD controller of DM6446 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 Raw 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 includes dm644x_ccdc.h and vpfe_capture.h header
 * files.  The setparams() API is called by vpfe_capture driver
 * to configure module parameters. This file is named DM644x so that other
 * variants such DM6443 may be supported using the same module.
 *
 * TODO: Test Raw bayer parameter settings and bayer capture
 *       Split module parameter structure to module specific ioctl structs
 *       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/gfp.h>
#include <linux/err.h>
#include <linux/module.h>

#include <media/davinci/dm644x_ccdc.h>
#include <media/davinci/vpss.h>

#include "dm644x_ccdc_regs.h"
#include "ccdc_hw_device.h"

MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("CCDC Driver for DM6446");
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,
                .config_params = {
                        .data_sz = CCDC_DATA_10BITS,
                },
        },
        .ycbcr = {
                .pix_fmt = CCDC_PIXFMT_YCBCR_8BIT,
                .frm_fmt = CCDC_FRMFMT_INTERLACED,
                .win = CCDC_WIN_PAL,
                .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
        },
};

#define CCDC_MAX_RAW_YUV_FORMATS        2

/* 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};

/* CCDC Save/Restore context */
static u32 ccdc_ctx[CCDC_REG_END / sizeof(u32)];

/* 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 flag)
{
        regw(flag, CCDC_PCR);
}

static void ccdc_enable_vport(int flag)
{
        if (flag)
                /* enable video port */
                regw(CCDC_ENABLE_VIDEO_PORT, CCDC_FMTCFG);
        else
                regw(CCDC_DISABLE_VIDEO_PORT, CCDC_FMTCFG);
}

/*
 * 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 val = 0, 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;
        regw((horz_start << CCDC_HORZ_INFO_SPH_SHIFT) | horz_nr_pixels,
             CCDC_HORZ_INFO);

        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 */
                val = (vert_start << CCDC_VDINT_VDINT0_SHIFT);
                regw(val, CCDC_VDINT);

        } else {
                /* Since first line doesn't have any data */
                vert_start += 1;
                vert_nr_lines = image_win->height - 1;
                /*
                 * configure VDINT0 and VDINT1. VDINT1 will be at half
                 * of image height
                 */
                mid_img = vert_start + (image_win->height / 2);
                val = (vert_start << CCDC_VDINT_VDINT0_SHIFT) |
                    (mid_img & CCDC_VDINT_VDINT1_MASK);
                regw(val, CCDC_VDINT);

        }
        regw((vert_start << CCDC_VERT_START_SLV0_SHIFT) | vert_start,
             CCDC_VERT_START);
        regw(vert_nr_lines, CCDC_VERT_LINES);
        dev_dbg(ccdc_cfg.dev, "\nEnd of ccdc_setwin...");
}

static void ccdc_readregs(void)
{
        unsigned int val = 0;

        val = regr(CCDC_ALAW);
        dev_notice(ccdc_cfg.dev, "\nReading 0x%x to ALAW...\n", val);
        val = regr(CCDC_CLAMP);
        dev_notice(ccdc_cfg.dev, "\nReading 0x%x to CLAMP...\n", val);
        val = regr(CCDC_DCSUB);
        dev_notice(ccdc_cfg.dev, "\nReading 0x%x to DCSUB...\n", val);
        val = regr(CCDC_BLKCMP);
        dev_notice(ccdc_cfg.dev, "\nReading 0x%x to BLKCMP...\n", val);
        val = regr(CCDC_FPC_ADDR);
        dev_notice(ccdc_cfg.dev, "\nReading 0x%x to FPC_ADDR...\n", val);
        val = regr(CCDC_FPC);
        dev_notice(ccdc_cfg.dev, "\nReading 0x%x to FPC...\n", val);
        val = regr(CCDC_FMTCFG);
        dev_notice(ccdc_cfg.dev, "\nReading 0x%x to FMTCFG...\n", val);
        val = regr(CCDC_COLPTN);
        dev_notice(ccdc_cfg.dev, "\nReading 0x%x to COLPTN...\n", val);
        val = regr(CCDC_FMT_HORZ);
        dev_notice(ccdc_cfg.dev, "\nReading 0x%x to FMT_HORZ...\n", val);
        val = regr(CCDC_FMT_VERT);
        dev_notice(ccdc_cfg.dev, "\nReading 0x%x to FMT_VERT...\n", val);
        val = regr(CCDC_HSIZE_OFF);
        dev_notice(ccdc_cfg.dev, "\nReading 0x%x to HSIZE_OFF...\n", val);
        val = regr(CCDC_SDOFST);
        dev_notice(ccdc_cfg.dev, "\nReading 0x%x to SDOFST...\n", val);
        val = regr(CCDC_VP_OUT);
        dev_notice(ccdc_cfg.dev, "\nReading 0x%x to VP_OUT...\n", val);
        val = regr(CCDC_SYN_MODE);
        dev_notice(ccdc_cfg.dev, "\nReading 0x%x to SYN_MODE...\n", val);
        val = regr(CCDC_HORZ_INFO);
        dev_notice(ccdc_cfg.dev, "\nReading 0x%x to HORZ_INFO...\n", val);
        val = regr(CCDC_VERT_START);
        dev_notice(ccdc_cfg.dev, "\nReading 0x%x to VERT_START...\n", val);
        val = regr(CCDC_VERT_LINES);
        dev_notice(ccdc_cfg.dev, "\nReading 0x%x to VERT_LINES...\n", val);
}

static int validate_ccdc_param(struct ccdc_config_params_raw *ccdcparam)
{
        if (ccdcparam->alaw.enable) {
                u8 max_gamma = ccdc_gamma_width_max_bit(ccdcparam->alaw.gamma_wd);
                u8 max_data = ccdc_data_size_max_bit(ccdcparam->data_sz);

                if ((ccdcparam->alaw.gamma_wd > CCDC_GAMMA_BITS_09_0) ||
                    (ccdcparam->alaw.gamma_wd < CCDC_GAMMA_BITS_15_6) ||
                    (max_gamma > max_data)) {
                        dev_dbg(ccdc_cfg.dev, "\nInvalid data line select");
                        return -1;
                }
        }
        return 0;
}

static int ccdc_update_raw_params(struct ccdc_config_params_raw *raw_params)
{
        struct ccdc_config_params_raw *config_params =
                                &ccdc_cfg.bayer.config_params;
        unsigned int *fpc_virtaddr = NULL;
        unsigned int *fpc_physaddr = NULL;

        memcpy(config_params, raw_params, sizeof(*raw_params));
        /*
         * allocate memory for fault pixel table and copy the user
         * values to the table
         */
        if (!config_params->fault_pxl.enable)
                return 0;

        fpc_physaddr = (unsigned int *)config_params->fault_pxl.fpc_table_addr;
        fpc_virtaddr = (unsigned int *)phys_to_virt(
                                (unsigned long)fpc_physaddr);
        /*
         * Allocate memory for FPC table if current
         * FPC table buffer is not big enough to
         * accommodate FPC Number requested
         */
        if (raw_params->fault_pxl.fp_num != config_params->fault_pxl.fp_num) {
                if (fpc_physaddr != NULL) {
                        free_pages((unsigned long)fpc_virtaddr,
                                   get_order
                                   (config_params->fault_pxl.fp_num *
                                   FP_NUM_BYTES));
                }

                /* Allocate memory for FPC table */
                fpc_virtaddr =
                        (unsigned int *)__get_free_pages(GFP_KERNEL | GFP_DMA,
                                                         get_order(raw_params->
                                                         fault_pxl.fp_num *
                                                         FP_NUM_BYTES));

                if (fpc_virtaddr == NULL) {
                        dev_dbg(ccdc_cfg.dev,
                                "\nUnable to allocate memory for FPC");
                        return -EFAULT;
                }
                fpc_physaddr =
                    (unsigned int *)virt_to_phys((void *)fpc_virtaddr);
        }

        /* Copy number of fault pixels and FPC table */
        config_params->fault_pxl.fp_num = raw_params->fault_pxl.fp_num;
        if (copy_from_user(fpc_virtaddr,
                        (void __user *)raw_params->fault_pxl.fpc_table_addr,
                        config_params->fault_pxl.fp_num * FP_NUM_BYTES)) {
                dev_dbg(ccdc_cfg.dev, "\n copy_from_user failed");
                return -EFAULT;
        }
        config_params->fault_pxl.fpc_table_addr = (unsigned long)fpc_physaddr;
        return 0;
}

static int ccdc_close(struct device *dev)
{
        struct ccdc_config_params_raw *config_params =
                                &ccdc_cfg.bayer.config_params;
        unsigned int *fpc_physaddr = NULL, *fpc_virtaddr = NULL;

        fpc_physaddr = (unsigned int *)config_params->fault_pxl.fpc_table_addr;

        if (fpc_physaddr != NULL) {
                fpc_virtaddr = (unsigned int *)
                    phys_to_virt((unsigned long)fpc_physaddr);
                free_pages((unsigned long)fpc_virtaddr,
                           get_order(config_params->fault_pxl.fp_num *
                           FP_NUM_BYTES));
        }
        return 0;
}

/*
 * ccdc_restore_defaults()
 * This function will write defaults to all CCDC registers
 */
static void ccdc_restore_defaults(void)
{
        int i;

        /* disable CCDC */
        ccdc_enable(0);
        /* set all registers to default value */
        for (i = 4; i <= 0x94; i += 4)
                regw(0,  i);
        regw(CCDC_NO_CULLING, CCDC_CULLING);
        regw(CCDC_GAMMA_BITS_11_2, CCDC_ALAW);
}

static int ccdc_open(struct device *device)
{
        ccdc_restore_defaults();
        if (ccdc_cfg.if_type == VPFE_RAW_BAYER)
                ccdc_enable_vport(1);
        return 0;
}

static void ccdc_sbl_reset(void)
{
        vpss_clear_wbl_overflow(VPSS_PCR_CCDC_WBL_O);
}

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

        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 copyingccdc params, %d\n",
                        x);
                return -EFAULT;
        }

        if (!validate_ccdc_param(&ccdc_raw_params)) {
                if (!ccdc_update_raw_params(&ccdc_raw_params))
                        return 0;
        }
        return -EINVAL;
}

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

        dev_dbg(ccdc_cfg.dev, "\nStarting ccdc_config_ycbcr...");
        /*
         * first restore the CCDC registers to default values
         * This is important since we assume default values to be set in
         * a lot of registers that we didn't touch
         */
        ccdc_restore_defaults();

        /*
         * configure pixel format, frame format, configure video frame
         * format, enable output to SDRAM, enable internal timing generator
         * and 8bit pack mode
         */
        syn_mode = (((params->pix_fmt & CCDC_SYN_MODE_INPMOD_MASK) <<
                    CCDC_SYN_MODE_INPMOD_SHIFT) |
                    ((params->frm_fmt & CCDC_SYN_FLDMODE_MASK) <<
                    CCDC_SYN_FLDMODE_SHIFT) | CCDC_VDHDEN_ENABLE |
                    CCDC_WEN_ENABLE | CCDC_DATA_PACK_ENABLE);

        /* setup BT.656 sync mode */
        if (params->bt656_enable) {
                regw(CCDC_REC656IF_BT656_EN, CCDC_REC656IF);

                /*
                 * configure the FID, VD, HD pin polarity,
                 * fld,hd pol positive, vd negative, 8-bit data
                 */
                syn_mode |= CCDC_SYN_MODE_VD_POL_NEGATIVE;
                if (ccdc_cfg.if_type == VPFE_BT656_10BIT)
                        syn_mode |= CCDC_SYN_MODE_10BITS;
                else
                        syn_mode |= CCDC_SYN_MODE_8BITS;
        } else {
                /* y/c external sync mode */
                syn_mode |= (((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));
        }
        regw(syn_mode, CCDC_SYN_MODE);

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

        /*
         * configure the order of y cb cr in SDRAM, and disable latch
         * internal register on vsync
         */
        if (ccdc_cfg.if_type == VPFE_BT656_10BIT)
                regw((params->pix_order << CCDC_CCDCFG_Y8POS_SHIFT) |
                        CCDC_LATCH_ON_VSYNC_DISABLE | CCDC_CCDCFG_BW656_10BIT,
                        CCDC_CCDCFG);
        else
                regw((params->pix_order << CCDC_CCDCFG_Y8POS_SHIFT) |
                        CCDC_LATCH_ON_VSYNC_DISABLE, CCDC_CCDCFG);

        /*
         * configure the horizontal line offset. This should be a
         * on 32 byte boundary. So clear LSB 5 bits
         */
        regw(((params->win.width * 2  + 31) & ~0x1f), CCDC_HSIZE_OFF);

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

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

static void ccdc_config_black_clamp(struct ccdc_black_clamp *bclamp)
{
        u32 val;

        if (!bclamp->enable) {
                /* configure DCSub */
                val = (bclamp->dc_sub) & CCDC_BLK_DC_SUB_MASK;
                regw(val, CCDC_DCSUB);
                dev_dbg(ccdc_cfg.dev, "\nWriting 0x%x to DCSUB...\n", val);
                regw(CCDC_CLAMP_DEFAULT_VAL, CCDC_CLAMP);
                dev_dbg(ccdc_cfg.dev, "\nWriting 0x0000 to CLAMP...\n");
                return;
        }
        /*
         * Configure gain,  Start pixel, No of line to be avg,
         * No of pixel/line to be avg, & Enable the Black clamping
         */
        val = ((bclamp->sgain & CCDC_BLK_SGAIN_MASK) |
               ((bclamp->start_pixel & CCDC_BLK_ST_PXL_MASK) <<
                CCDC_BLK_ST_PXL_SHIFT) |
               ((bclamp->sample_ln & CCDC_BLK_SAMPLE_LINE_MASK) <<
                CCDC_BLK_SAMPLE_LINE_SHIFT) |
               ((bclamp->sample_pixel & CCDC_BLK_SAMPLE_LN_MASK) <<
                CCDC_BLK_SAMPLE_LN_SHIFT) | CCDC_BLK_CLAMP_ENABLE);
        regw(val, CCDC_CLAMP);
        dev_dbg(ccdc_cfg.dev, "\nWriting 0x%x to CLAMP...\n", val);
        /* If Black clamping is enable then make dcsub 0 */
        regw(CCDC_DCSUB_DEFAULT_VAL, CCDC_DCSUB);
        dev_dbg(ccdc_cfg.dev, "\nWriting 0x00000000 to DCSUB...\n");
}

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) |
              ((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, CCDC_BLKCMP);
}

static void ccdc_config_fpc(struct ccdc_fault_pixel *fpc)
{
        u32 val;

        /* Initially disable FPC */
        val = CCDC_FPC_DISABLE;
        regw(val, CCDC_FPC);

        if (!fpc->enable)
                return;

        /* Configure Fault pixel if needed */
        regw(fpc->fpc_table_addr, CCDC_FPC_ADDR);
        dev_dbg(ccdc_cfg.dev, "\nWriting 0x%lx to FPC_ADDR...\n",
                       (fpc->fpc_table_addr));
        /* Write the FPC params with FPC disable */
        val = fpc->fp_num & CCDC_FPC_FPC_NUM_MASK;
        regw(val, CCDC_FPC);

        dev_dbg(ccdc_cfg.dev, "\nWriting 0x%x to FPC...\n", val);
        /* read the FPC register */
        val = regr(CCDC_FPC) | CCDC_FPC_ENABLE;
        regw(val, CCDC_FPC);
        dev_dbg(ccdc_cfg.dev, "\nWriting 0x%x to FPC...\n", val);
}

/*
 * ccdc_config_raw()
 * This function will configure CCDC for Raw capture mode
 */
static void 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 syn_mode = 0;
        unsigned int val;

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

        /*      Reset CCDC */
        ccdc_restore_defaults();

        /* Disable latching function registers on VSYNC  */
        regw(CCDC_LATCH_ON_VSYNC_DISABLE, CCDC_CCDCFG);

        /*
         * Configure the vertical sync polarity(SYN_MODE.VDPOL),
         * horizontal sync polarity (SYN_MODE.HDPOL), frame id polarity
         * (SYN_MODE.FLDPOL), frame format(progressive or interlace),
         * data size(SYNMODE.DATSIZ), &pixel format (Input mode), output
         * SDRAM, enable internal timing generator
         */
        syn_mode =
                (((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) |
                ((config_params->data_sz & CCDC_DATA_SZ_MASK) <<
                CCDC_DATA_SZ_SHIFT) |
                ((params->pix_fmt & CCDC_PIX_FMT_MASK) << CCDC_PIX_FMT_SHIFT) |
                CCDC_WEN_ENABLE | CCDC_VDHDEN_ENABLE);

        /* Enable and configure aLaw register if needed */
        if (config_params->alaw.enable) {
                val = ((config_params->alaw.gamma_wd &
                      CCDC_ALAW_GAMMA_WD_MASK) | CCDC_ALAW_ENABLE);
                regw(val, CCDC_ALAW);
                dev_dbg(ccdc_cfg.dev, "\nWriting 0x%x to ALAW...\n", val);
        }

        /* Configure video window */
        ccdc_setwin(&params->win, params->frm_fmt, CCDC_PPC_RAW);

        /* Configure Black Clamp */
        ccdc_config_black_clamp(&config_params->blk_clamp);

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

        /* Configure Fault Pixel Correction */
        ccdc_config_fpc(&config_params->fault_pxl);

        /* If data size is 8 bit then pack the data */
        if ((config_params->data_sz == CCDC_DATA_8BITS) ||
             config_params->alaw.enable)
                syn_mode |= CCDC_DATA_PACK_ENABLE;

        /* disable video port */
        val = CCDC_DISABLE_VIDEO_PORT;

        if (config_params->data_sz == CCDC_DATA_8BITS)
                val |= (CCDC_DATA_10BITS & CCDC_FMTCFG_VPIN_MASK)
                    << CCDC_FMTCFG_VPIN_SHIFT;
        else
                val |= (config_params->data_sz & CCDC_FMTCFG_VPIN_MASK)
                    << CCDC_FMTCFG_VPIN_SHIFT;
        /* Write value in FMTCFG */
        regw(val, CCDC_FMTCFG);

        dev_dbg(ccdc_cfg.dev, "\nWriting 0x%x to FMTCFG...\n", val);
        /* Configure the color pattern according to mt9t001 sensor */
        regw(CCDC_COLPTN_VAL, CCDC_COLPTN);

        dev_dbg(ccdc_cfg.dev, "\nWriting 0xBB11BB11 to COLPTN...\n");
        /*
         * Configure Data formatter(Video port) pixel selection
         * (FMT_HORZ, FMT_VERT)
         */
        val = ((params->win.left & CCDC_FMT_HORZ_FMTSPH_MASK) <<
              CCDC_FMT_HORZ_FMTSPH_SHIFT) |
              (params->win.width & CCDC_FMT_HORZ_FMTLNH_MASK);
        regw(val, CCDC_FMT_HORZ);

        dev_dbg(ccdc_cfg.dev, "\nWriting 0x%x to FMT_HORZ...\n", val);
        val = (params->win.top & CCDC_FMT_VERT_FMTSLV_MASK)
            << CCDC_FMT_VERT_FMTSLV_SHIFT;
        if (params->frm_fmt == CCDC_FRMFMT_PROGRESSIVE)
                val |= (params->win.height) & CCDC_FMT_VERT_FMTLNV_MASK;
        else
                val |= (params->win.height >> 1) & CCDC_FMT_VERT_FMTLNV_MASK;

        dev_dbg(ccdc_cfg.dev, "\nparams->win.height  0x%x ...\n",
               params->win.height);
        regw(val, CCDC_FMT_VERT);

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

        dev_dbg(ccdc_cfg.dev, "\nbelow regw(val, FMT_VERT)...");

        /*
         * Configure Horizontal offset register. If pack 8 is enabled then
         * 1 pixel will take 1 byte
         */
        if ((config_params->data_sz == CCDC_DATA_8BITS) ||
            config_params->alaw.enable)
                regw((params->win.width + CCDC_32BYTE_ALIGN_VAL) &
                    CCDC_HSIZE_OFF_MASK, CCDC_HSIZE_OFF);
        else
                /* else one pixel will take 2 byte */
                regw(((params->win.width * CCDC_TWO_BYTES_PER_PIXEL) +
                    CCDC_32BYTE_ALIGN_VAL) & CCDC_HSIZE_OFF_MASK,
                    CCDC_HSIZE_OFF);

        /* Set value for SDOFST */
        if (params->frm_fmt == CCDC_FRMFMT_INTERLACED) {
                if (params->image_invert_enable) {
                        /* For intelace inverse mode */
                        regw(CCDC_INTERLACED_IMAGE_INVERT, CCDC_SDOFST);
                        dev_dbg(ccdc_cfg.dev, "\nWriting 0x4B6D to SDOFST..\n");
                }

                else {
                        /* For intelace non inverse mode */
                        regw(CCDC_INTERLACED_NO_IMAGE_INVERT, CCDC_SDOFST);
                        dev_dbg(ccdc_cfg.dev, "\nWriting 0x0249 to SDOFST..\n");
                }
        } else if (params->frm_fmt == CCDC_FRMFMT_PROGRESSIVE) {
                regw(CCDC_PROGRESSIVE_NO_IMAGE_INVERT, CCDC_SDOFST);
                dev_dbg(ccdc_cfg.dev, "\nWriting 0x0000 to SDOFST...\n");
        }

        /*
         * Configure video port pixel selection (VPOUT)
         * Here -1 is to make the height value less than FMT_VERT.FMTLNV
         */
        if (params->frm_fmt == CCDC_FRMFMT_PROGRESSIVE)
                val = (((params->win.height - 1) & CCDC_VP_OUT_VERT_NUM_MASK))
                    << CCDC_VP_OUT_VERT_NUM_SHIFT;
        else
                val =
                    ((((params->win.height >> CCDC_INTERLACED_HEIGHT_SHIFT) -
                     1) & CCDC_VP_OUT_VERT_NUM_MASK)) <<
                    CCDC_VP_OUT_VERT_NUM_SHIFT;

        val |= ((((params->win.width))) & CCDC_VP_OUT_HORZ_NUM_MASK)
            << CCDC_VP_OUT_HORZ_NUM_SHIFT;
        val |= (params->win.left) & CCDC_VP_OUT_HORZ_ST_MASK;
        regw(val, CCDC_VP_OUT);

        dev_dbg(ccdc_cfg.dev, "\nWriting 0x%x to VP_OUT...\n", val);
        regw(syn_mode, CCDC_SYN_MODE);
        dev_dbg(ccdc_cfg.dev, "\nWriting 0x%x to SYN_MODE...\n", syn_mode);

        ccdc_sbl_reset();
        dev_dbg(ccdc_cfg.dev, "\nend of ccdc_config_raw...");
        ccdc_readregs();
}

static int ccdc_configure(void)
{
        if (ccdc_cfg.if_type == VPFE_RAW_BAYER)
                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)
{
        if (ccdc_cfg.if_type == VPFE_RAW_BAYER) {
                ccdc_cfg.bayer.pix_fmt = CCDC_PIXFMT_RAW;
                if (pixfmt == V4L2_PIX_FMT_SBGGR8)
                        ccdc_cfg.bayer.config_params.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(CCDC_SYN_MODE) >> 15) & 1;
}

/* misc operations */
static inline void ccdc_setfbaddr(unsigned long addr)
{
        regw(addr & 0xffffffe0, CCDC_SDR_ADDR);
}

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:
        case VPFE_BT656_10BIT:
                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 void ccdc_save_context(void)
{
        ccdc_ctx[CCDC_PCR >> 2] = regr(CCDC_PCR);
        ccdc_ctx[CCDC_SYN_MODE >> 2] = regr(CCDC_SYN_MODE);
        ccdc_ctx[CCDC_HD_VD_WID >> 2] = regr(CCDC_HD_VD_WID);
        ccdc_ctx[CCDC_PIX_LINES >> 2] = regr(CCDC_PIX_LINES);
        ccdc_ctx[CCDC_HORZ_INFO >> 2] = regr(CCDC_HORZ_INFO);
        ccdc_ctx[CCDC_VERT_START >> 2] = regr(CCDC_VERT_START);
        ccdc_ctx[CCDC_VERT_LINES >> 2] = regr(CCDC_VERT_LINES);
        ccdc_ctx[CCDC_CULLING >> 2] = regr(CCDC_CULLING);
        ccdc_ctx[CCDC_HSIZE_OFF >> 2] = regr(CCDC_HSIZE_OFF);
        ccdc_ctx[CCDC_SDOFST >> 2] = regr(CCDC_SDOFST);
        ccdc_ctx[CCDC_SDR_ADDR >> 2] = regr(CCDC_SDR_ADDR);
        ccdc_ctx[CCDC_CLAMP >> 2] = regr(CCDC_CLAMP);
        ccdc_ctx[CCDC_DCSUB >> 2] = regr(CCDC_DCSUB);
        ccdc_ctx[CCDC_COLPTN >> 2] = regr(CCDC_COLPTN);
        ccdc_ctx[CCDC_BLKCMP >> 2] = regr(CCDC_BLKCMP);
        ccdc_ctx[CCDC_FPC >> 2] = regr(CCDC_FPC);
        ccdc_ctx[CCDC_FPC_ADDR >> 2] = regr(CCDC_FPC_ADDR);
        ccdc_ctx[CCDC_VDINT >> 2] = regr(CCDC_VDINT);
        ccdc_ctx[CCDC_ALAW >> 2] = regr(CCDC_ALAW);
        ccdc_ctx[CCDC_REC656IF >> 2] = regr(CCDC_REC656IF);
        ccdc_ctx[CCDC_CCDCFG >> 2] = regr(CCDC_CCDCFG);
        ccdc_ctx[CCDC_FMTCFG >> 2] = regr(CCDC_FMTCFG);
        ccdc_ctx[CCDC_FMT_HORZ >> 2] = regr(CCDC_FMT_HORZ);
        ccdc_ctx[CCDC_FMT_VERT >> 2] = regr(CCDC_FMT_VERT);
        ccdc_ctx[CCDC_FMT_ADDR0 >> 2] = regr(CCDC_FMT_ADDR0);
        ccdc_ctx[CCDC_FMT_ADDR1 >> 2] = regr(CCDC_FMT_ADDR1);
        ccdc_ctx[CCDC_FMT_ADDR2 >> 2] = regr(CCDC_FMT_ADDR2);
        ccdc_ctx[CCDC_FMT_ADDR3 >> 2] = regr(CCDC_FMT_ADDR3);
        ccdc_ctx[CCDC_FMT_ADDR4 >> 2] = regr(CCDC_FMT_ADDR4);
        ccdc_ctx[CCDC_FMT_ADDR5 >> 2] = regr(CCDC_FMT_ADDR5);
        ccdc_ctx[CCDC_FMT_ADDR6 >> 2] = regr(CCDC_FMT_ADDR6);
        ccdc_ctx[CCDC_FMT_ADDR7 >> 2] = regr(CCDC_FMT_ADDR7);
        ccdc_ctx[CCDC_PRGEVEN_0 >> 2] = regr(CCDC_PRGEVEN_0);
        ccdc_ctx[CCDC_PRGEVEN_1 >> 2] = regr(CCDC_PRGEVEN_1);
        ccdc_ctx[CCDC_PRGODD_0 >> 2] = regr(CCDC_PRGODD_0);
        ccdc_ctx[CCDC_PRGODD_1 >> 2] = regr(CCDC_PRGODD_1);
        ccdc_ctx[CCDC_VP_OUT >> 2] = regr(CCDC_VP_OUT);
}

static void ccdc_restore_context(void)
{
        regw(ccdc_ctx[CCDC_SYN_MODE >> 2], CCDC_SYN_MODE);
        regw(ccdc_ctx[CCDC_HD_VD_WID >> 2], CCDC_HD_VD_WID);
        regw(ccdc_ctx[CCDC_PIX_LINES >> 2], CCDC_PIX_LINES);
        regw(ccdc_ctx[CCDC_HORZ_INFO >> 2], CCDC_HORZ_INFO);
        regw(ccdc_ctx[CCDC_VERT_START >> 2], CCDC_VERT_START);
        regw(ccdc_ctx[CCDC_VERT_LINES >> 2], CCDC_VERT_LINES);
        regw(ccdc_ctx[CCDC_CULLING >> 2], CCDC_CULLING);
        regw(ccdc_ctx[CCDC_HSIZE_OFF >> 2], CCDC_HSIZE_OFF);
        regw(ccdc_ctx[CCDC_SDOFST >> 2], CCDC_SDOFST);
        regw(ccdc_ctx[CCDC_SDR_ADDR >> 2], CCDC_SDR_ADDR);
        regw(ccdc_ctx[CCDC_CLAMP >> 2], CCDC_CLAMP);
        regw(ccdc_ctx[CCDC_DCSUB >> 2], CCDC_DCSUB);
        regw(ccdc_ctx[CCDC_COLPTN >> 2], CCDC_COLPTN);
        regw(ccdc_ctx[CCDC_BLKCMP >> 2], CCDC_BLKCMP);
        regw(ccdc_ctx[CCDC_FPC >> 2], CCDC_FPC);
        regw(ccdc_ctx[CCDC_FPC_ADDR >> 2], CCDC_FPC_ADDR);
        regw(ccdc_ctx[CCDC_VDINT >> 2], CCDC_VDINT);
        regw(ccdc_ctx[CCDC_ALAW >> 2], CCDC_ALAW);
        regw(ccdc_ctx[CCDC_REC656IF >> 2], CCDC_REC656IF);
        regw(ccdc_ctx[CCDC_CCDCFG >> 2], CCDC_CCDCFG);
        regw(ccdc_ctx[CCDC_FMTCFG >> 2], CCDC_FMTCFG);
        regw(ccdc_ctx[CCDC_FMT_HORZ >> 2], CCDC_FMT_HORZ);
        regw(ccdc_ctx[CCDC_FMT_VERT >> 2], CCDC_FMT_VERT);
        regw(ccdc_ctx[CCDC_FMT_ADDR0 >> 2], CCDC_FMT_ADDR0);
        regw(ccdc_ctx[CCDC_FMT_ADDR1 >> 2], CCDC_FMT_ADDR1);
        regw(ccdc_ctx[CCDC_FMT_ADDR2 >> 2], CCDC_FMT_ADDR2);
        regw(ccdc_ctx[CCDC_FMT_ADDR3 >> 2], CCDC_FMT_ADDR3);
        regw(ccdc_ctx[CCDC_FMT_ADDR4 >> 2], CCDC_FMT_ADDR4);
        regw(ccdc_ctx[CCDC_FMT_ADDR5 >> 2], CCDC_FMT_ADDR5);
        regw(ccdc_ctx[CCDC_FMT_ADDR6 >> 2], CCDC_FMT_ADDR6);
        regw(ccdc_ctx[CCDC_FMT_ADDR7 >> 2], CCDC_FMT_ADDR7);
        regw(ccdc_ctx[CCDC_PRGEVEN_0 >> 2], CCDC_PRGEVEN_0);
        regw(ccdc_ctx[CCDC_PRGEVEN_1 >> 2], CCDC_PRGEVEN_1);
        regw(ccdc_ctx[CCDC_PRGODD_0 >> 2], CCDC_PRGODD_0);
        regw(ccdc_ctx[CCDC_PRGODD_1 >> 2], CCDC_PRGODD_1);
        regw(ccdc_ctx[CCDC_VP_OUT >> 2], CCDC_VP_OUT);
        regw(ccdc_ctx[CCDC_PCR >> 2], CCDC_PCR);
}
static struct ccdc_hw_device ccdc_hw_dev = {
        .name = "DM6446 CCDC",
        .owner = THIS_MODULE,
        .hw_ops = {
                .open = ccdc_open,
                .close = ccdc_close,
                .reset = ccdc_sbl_reset,
                .enable = ccdc_enable,
                .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 dm644x_ccdc_probe(struct platform_device *pdev)
{
        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;
        }

        ccdc_cfg.dev = &pdev->dev;
        printk(KERN_NOTICE "%s is registered with vpfe.\n", ccdc_hw_dev.name);
        return 0;
fail_nomem:
        release_mem_region(res->start, resource_size(res));
fail_nores:
        vpfe_unregister_ccdc_device(&ccdc_hw_dev);
        return status;
}

static int dm644x_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 int dm644x_ccdc_suspend(struct device *dev)
{
        /* Save CCDC context */
        ccdc_save_context();
        /* Disable CCDC */
        ccdc_enable(0);

        return 0;
}

static int dm644x_ccdc_resume(struct device *dev)
{
        /* Restore CCDC context */
        ccdc_restore_context();

        return 0;
}

static const struct dev_pm_ops dm644x_ccdc_pm_ops = {
        .suspend = dm644x_ccdc_suspend,
        .resume = dm644x_ccdc_resume,
};

static struct platform_driver dm644x_ccdc_driver = {
        .driver = {
                .name   = "dm644x_ccdc",
                .pm = &dm644x_ccdc_pm_ops,
        },
        .remove = dm644x_ccdc_remove,
        .probe = dm644x_ccdc_probe,
};

module_platform_driver(dm644x_ccdc_driver);