path: root/drivers/media/video/davinci/dm355_ccdc.c

/*
 * 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/clk.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;
	/* Master clock */
	struct clk *mclk;
	/* slave clock */
	struct clk *sclk;
	/* 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 = {
				.gama_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 &= (