drivers/staging/cx25821/cx25821-medusa-video.c

/*
 *  Driver for the Conexant CX25821 PCIe bridge
 *
 *  Copyright (C) 2009 Conexant Systems Inc.
 *  Authors  <shu.lin@conexant.com>, <hiep.huynh@conexant.com>
 *
 *  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., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

#include "cx25821.h"
#include "cx25821-medusa-video.h"
#include "cx25821-biffuncs.h"

/////////////////////////////////////////////////////////////////////////////////////////
//medusa_enable_bluefield_output()
//
// Enable the generation of blue filed output if no video
//
static void medusa_enable_bluefield_output(struct cx25821_dev *dev, int channel,
					   int enable)
{
	int ret_val = 1;
	u32 value = 0;
	u32 tmp = 0;
	int out_ctrl = OUT_CTRL1;
	int out_ctrl_ns = OUT_CTRL_NS;

	switch (channel) {
	default:
	case VDEC_A:
		break;
	case VDEC_B:
		out_ctrl = VDEC_B_OUT_CTRL1;
		out_ctrl_ns = VDEC_B_OUT_CTRL_NS;
		break;
	case VDEC_C:
		out_ctrl = VDEC_C_OUT_CTRL1;
		out_ctrl_ns = VDEC_C_OUT_CTRL_NS;
		break;
	case VDEC_D:
		out_ctrl = VDEC_D_OUT_CTRL1;
		out_ctrl_ns = VDEC_D_OUT_CTRL_NS;
		break;
	case VDEC_E:
		out_ctrl = VDEC_E_OUT_CTRL1;
		out_ctrl_ns = VDEC_E_OUT_CTRL_NS;
		return;
	case VDEC_F:
		out_ctrl = VDEC_F_OUT_CTRL1;
		out_ctrl_ns = VDEC_F_OUT_CTRL_NS;
		return;
	case VDEC_G:
		out_ctrl = VDEC_G_OUT_CTRL1;
		out_ctrl_ns = VDEC_G_OUT_CTRL_NS;
		return;
	case VDEC_H:
		out_ctrl = VDEC_H_OUT_CTRL1;
		out_ctrl_ns = VDEC_H_OUT_CTRL_NS;
		return;
	}

	value = cx25821_i2c_read(&dev->i2c_bus[0], out_ctrl, &tmp);
	value &= 0xFFFFFF7F;	// clear BLUE_FIELD_EN
	if (enable)
		value |= 0x00000080;	// set BLUE_FIELD_EN
	ret_val = cx25821_i2c_write(&dev->i2c_bus[0], out_ctrl, value);

	value = cx25821_i2c_read(&dev->i2c_bus[0], out_ctrl_ns, &tmp);
	value &= 0xFFFFFF7F;
	if (enable)
		value |= 0x00000080;	// set BLUE_FIELD_EN
	ret_val = cx25821_i2c_write(&dev->i2c_bus[0], out_ctrl_ns, value);
}

static int medusa_initialize_ntsc(struct cx25821_dev *dev)
{
	int ret_val = 0;
	int i = 0;
	u32 value = 0;
	u32 tmp = 0;

	mutex_lock(&dev->lock);

	for (i = 0; i < MAX_DECODERS; i++) {
		// set video format NTSC-M
		value =
		    cx25821_i2c_read(&dev->i2c_bus[0], MODE_CTRL + (0x200 * i),
				     &tmp);
		value &= 0xFFFFFFF0;
		value |= 0x10001;	// enable the fast locking mode bit[16]
		ret_val =
		    cx25821_i2c_write(&dev->i2c_bus[0], MODE_CTRL + (0x200 * i),
				      value);

		// resolution NTSC 720x480
		value =
		    cx25821_i2c_read(&dev->i2c_bus[0],
				     HORIZ_TIM_CTRL + (0x200 * i), &tmp);
		value &= 0x00C00C00;
		value |= 0x612D0074;
		ret_val =
		    cx25821_i2c_write(&dev->i2c_bus[0],
				      HORIZ_TIM_CTRL + (0x200 * i), value);

		value =
		    cx25821_i2c_read(&dev->i2c_bus[0],
				     VERT_TIM_CTRL + (0x200 * i), &tmp);
		value &= 0x00C00C00;
		value |= 0x1C1E001A;	// vblank_cnt + 2 to get camera ID
		ret_val =
		    cx25821_i2c_write(&dev->i2c_bus[0],
				      VERT_TIM_CTRL + (0x200 * i), value);

		// chroma subcarrier step size
		ret_val =
		    cx25821_i2c_write(&dev->i2c_bus[0],
				      SC_STEP_SIZE + (0x200 * i), 0x43E00000);

		// enable VIP optional active
		value =
		    cx25821_i2c_read(&dev->i2c_bus[0],
				     OUT_CTRL_NS + (0x200 * i), &tmp);
		value &= 0xFFFBFFFF;
		value |= 0x00040000;
		ret_val =
		    cx25821_i2c_write(&dev->i2c_bus[0],
				      OUT_CTRL_NS + (0x200 * i), value);

		// enable VIP optional active (VIP_OPT_AL) for direct output.
		value =
		    cx25821_i2c_read(&dev->i2c_bus[0], OUT_CTRL1 + (0x200 * i),
				     &tmp);
		value &= 0xFFFBFFFF;
		value |= 0x00040000;
		ret_val =
		    cx25821_i2c_write(&dev->i2c_bus[0], OUT_CTRL1 + (0x200 * i),
				      value);

		// clear VPRES_VERT_EN bit, fixes the chroma run away problem
		// when the input switching rate < 16 fields
		//
		value =
		    cx25821_i2c_read(&dev->i2c_bus[0],
				     MISC_TIM_CTRL + (0x200 * i), &tmp);
		value = setBitAtPos(value, 14);	// disable special play detection
		value = clearBitAtPos(value, 15);
		ret_val =
		    cx25821_i2c_write(&dev->i2c_bus[0],
				      MISC_TIM_CTRL + (0x200 * i), value);

		// set vbi_gate_en to 0
		value =
		    cx25821_i2c_read(&dev->i2c_bus[0], DFE_CTRL1 + (0x200 * i),
				     &tmp);
		value = clearBitAtPos(value, 29);
		ret_val =
		    cx25821_i2c_write(&dev->i2c_bus[0], DFE_CTRL1 + (0x200 * i),
				      value);

		// Enable the generation of blue field output if no video
		medusa_enable_bluefield_output(dev, i, 1);
	}

	for (i = 0; i < MAX_ENCODERS; i++) {
		// NTSC hclock
		value =
		    cx25821_i2c_read(&dev->i2c_bus[0],
				     DENC_A_REG_1 + (0x100 * i), &tmp);
		value &= 0xF000FC00;
		value |= 0x06B402D0;
		ret_val =
		    cx25821_i2c_write(&dev->i2c_bus[0],
				      DENC_A_REG_1 + (0x100 * i), value);

		// burst begin and burst end
		value =
		    cx25821_i2c_read(&dev->i2c_bus[0],
				     DENC_A_REG_2 + (0x100 * i), &tmp);
		value &= 0xFF000000;
		value |= 0x007E9054;
		ret_val =
		    cx25821_i2c_write(&dev->i2c_bus[0],
				      DENC_A_REG_2 + (0x100 * i), value);

		value =
		    cx25821_i2c_read(&dev->i2c_bus[0],
				     DENC_A_REG_3 + (0x100 * i), &tmp);
		value &= 0xFC00FE00;
		value |= 0x00EC00F0;
		ret_val =
		    cx25821_i2c_write(&dev->i2c_bus[0],
				      DENC_A_REG_3 + (0x100 * i), value);

		// set NTSC vblank, no phase alternation, 7.5 IRE pedestal
		value =
		    cx25821_i2c_read(&dev->i2c_bus[0],
				     DENC_A_REG_4 + (0x100 * i), &tmp);
		value &= 0x00FCFFFF;
		value |= 0x13020000;
		ret_val =
		    cx25821_i2c_write(&dev->i2c_bus[0],
				      DENC_A_REG_4 + (0x100 * i), value);

		value =
		    cx25821_i2c_read(&dev->i2c_bus[0],
				     DENC_A_REG_5 + (0x100 * i), &tmp);
		value &= 0xFFFF0000;
		value |= 0x0000E575;
		ret_val =
		    cx25821_i2c_write(&dev->i2c_bus[0],
				      DENC_A_REG_5 + (0x100 * i), value);

		ret_val =
		    cx25821_i2c_write(&dev->i2c_bus[0],
				      DENC_A_REG_6 + (0x100 * i), 0x009A89C1);

		// Subcarrier Increment
		ret_val =
		    cx25821_i2c_write(&dev->i2c_bus[0],
				      DENC_A_REG_7 + (0x100 * i), 0x21F07C1F);
	}

	//set picture resolutions
	ret_val = cx25821_i2c_write(&dev->i2c_bus[0], HSCALE_CTRL, 0x0);	//0 - 720
	ret_val = cx25821_i2c_write(&dev->i2c_bus[0], VSCALE_CTRL, 0x0);	//0 - 480

	// set Bypass input format to NTSC 525 lines
	value = cx25821_i2c_read(&dev->i2c_bus[0], BYP_AB_CTRL, &tmp);
	value |= 0x00080200;
	ret_val = cx25821_i2c_write(&dev->i2c_bus[0], BYP_AB_CTRL, value);

	mutex_unlock(&dev->lock);

	return ret_val;
}

static int medusa_PALCombInit(struct cx25821_dev *dev, int dec)
{
	int ret_val = -1;
	u32 value = 0, tmp = 0;

	// Setup for 2D threshold
	ret_val =
	    cx25821_i2c_write(&dev->i2c_bus[0], COMB_2D_HFS_CFG + (0x200 * dec),
			      0x20002861);
	ret_val =
	    cx25821_i2c_write(&dev->i2c_bus[0], COMB_2D_HFD_CFG + (0x200 * dec),
			      0x20002861);
	ret_val =
	    cx25821_i2c_write(&dev->i2c_bus[0], COMB_2D_LF_CFG + (0x200 * dec),
			      0x200A1023);

	// Setup flat chroma and luma thresholds
	value =
	    cx25821_i2c_read(&dev->i2c_bus[0],
			     COMB_FLAT_THRESH_CTRL + (0x200 * dec), &tmp);
	value &= 0x06230000;
	ret_val =
	    cx25821_i2c_write(&dev->i2c_bus[0],
			      COMB_FLAT_THRESH_CTRL + (0x200 * dec), value);

	// set comb 2D blend
	ret_val =
	    cx25821_i2c_write(&dev->i2c_bus[0], COMB_2D_BLEND + (0x200 * dec),
			      0x210F0F0F);

	// COMB MISC CONTROL
	ret_val =
	    cx25821_i2c_write(&dev->i2c_bus[0], COMB_MISC_CTRL + (0x200 * dec),
			      0x41120A7F);

	return ret_val;
}

static int medusa_initialize_pal(struct cx25821_dev *dev)
{
	int ret_val = 0;
	int i = 0;
	u32 value = 0;
	u32 tmp = 0;

	mutex_lock(&dev->lock);

	for (i = 0; i < MAX_DECODERS; i++) {
		// set video format PAL-BDGHI
		value =
		    cx25821_i2c_read(&dev->i2c_bus[0], MODE_CTRL + (0x200 * i),
				     &tmp);
		value &= 0xFFFFFFF0;
		value |= 0x10004;	// enable the fast locking mode bit[16]
		ret_val =
		    cx25821_i2c_write(&dev->i2c_bus[0], MODE_CTRL + (0x200 * i),
				      value);

		// resolution PAL 720x576
		value =
		    cx25821_i2c_read(&dev->i2c_bus[0],
				     HORIZ_TIM_CTRL + (0x200 * i), &tmp);
		value &= 0x00C00C00;
		value |= 0x632D007D;
		ret_val =
		    cx25821_i2c_write(&dev->i2c_bus[0],
				      HORIZ_TIM_CTRL + (0x200 * i), value);

		// vblank656_cnt=x26, vactive_cnt=240h, vblank_cnt=x24
		value =
		    cx25821_i2c_read(&dev->i2c_bus[0],
				     VERT_TIM_CTRL + (0x200 * i), &tmp);
		value &= 0x00C00C00;
		value |= 0x28240026;	// vblank_cnt + 2 to get camera ID
		ret_val =
		    cx25821_i2c_write(&dev->i2c_bus[0],
				      VERT_TIM_CTRL + (0x200 * i), value);

		// chroma subcarrier step size
		ret_val =
		    cx25821_i2c_write(&dev->i2c_bus[0],
				      SC_STEP_SIZE + (0x200 * i), 0x5411E2D0);

		// enable VIP optional active
		value =
		    cx25821_i2c_read(&dev->i2c_bus[0],
				     OUT_CTRL_NS + (0x200 * i), &tmp);
		value &= 0xFFFBFFFF;
		value |= 0x00040000;
		ret_val =
		    cx25821_i2c_write(&dev->i2c_bus[0],
				      OUT_CTRL_NS + (0x200 * i), value);

		// enable VIP optional active (VIP_OPT_AL) for direct output.
		value =
		    cx25821_i2c_read(&dev->i2c_bus[0], OUT_CTRL1 + (0x200 * i),
				     &tmp);
		value &= 0xFFFBFFFF;
		value |= 0x00040000;
		ret_val =
		    cx25821_i2c_write(&dev->i2c_bus[0], OUT_CTRL1 + (0x200 * i),
				      value);

		// clear VPRES_VERT_EN bit, fixes the chroma run away problem
		// when the input switching rate < 16 fields
		value =
		    cx25821_i2c_read(&dev->i2c_bus[0],
				     MISC_TIM_CTRL + (0x200 * i), &tmp);
		value = setBitAtPos(value, 14);	// disable special play detection
		value = clearBitAtPos(value, 15);
		ret_val =
		    cx25821_i2c_write(&dev->i2c_bus[0],
				      MISC_TIM_CTRL + (0x200 * i), value);

		// set vbi_gate_en to 0
		value =
		    cx25821_i2c_read(&dev->i2c_bus[0], DFE_CTRL1 + (0x200 * i),
				     &tmp);
		value = clearBitAtPos(value, 29);
		ret_val =
		    cx25821_i2c_write(&dev->i2c_bus[0], DFE_CTRL1 + (0x200 * i),
				      value);

		medusa_PALCombInit(dev, i);

		// Enable the generation of blue field output if no video
		medusa_enable_bluefield_output(dev, i, 1);
	}

	for (i = 0; i < MAX_ENCODERS; i++) {
		// PAL hclock
		value =
		    cx25821_i2c_read(&dev->i2c_bus[0],
				     DENC_A_REG_1 + (0x100 * i), &tmp);
		value &= 0xF000FC00;
		value |= 0x06C002D0;
		ret_val =
		    cx25821_i2c_write(&dev->i2c_bus[0],
				      DENC_A_REG_1 + (0x100 * i), value);

		// burst begin and burst end
		value =
		    cx25821_i2c_read(&dev->i2c_bus[0],
				     DENC_A_REG_2 + (0x100 * i), &tmp);
		value &= 0xFF000000;
		value |= 0x007E9754;
		ret_val =
		    cx25821_i2c_write(&dev->i2c_bus[0],
				      DENC_A_REG_2 + (0x100 * i), value);

		// hblank and vactive
		value =
		    cx25821_i2c_read(&dev->i2c_bus[0],
				     DENC_A_REG_3 + (0x100 * i), &tmp);
		value &= 0xFC00FE00;
		value |= 0x00FC0120;
		ret_val =
		    cx25821_i2c_write(&dev->i2c_bus[0],
				      DENC_A_REG_3 + (0x100 * i), value);

		// set PAL vblank, phase alternation, 0 IRE pedestal
		value =
		    cx25821_i2c_read(&dev->i2c_bus[0],
				     DENC_A_REG_4 + (0x100 * i), &tmp);
		value &= 0x00FCFFFF;
		value |= 0x14010000;
		ret_val =
		    cx25821_i2c_write(&dev->i2c_bus[0],
				      DENC_A_REG_4 + (0x100 * i), value);

		value =
		    cx25821_i2c_read(&dev->i2c_bus[0],
				     DENC_A_REG_5 + (0x100 * i), &tmp);
		value &= 0xFFFF0000;
		value |= 0x0000F078;
		ret_val =
		    cx25821_i2c_write(&dev->i2c_bus[0],
				      DENC_A_REG_5 + (0x100 * i), value);

		ret_val =
		    cx25821_i2c_write(&dev->i2c_bus[0],
				      DENC_A_REG_6 + (0x100 * i), 0x00A493CF);

		// Subcarrier Increment
		ret_val =
		    cx25821_i2c_write(&dev->i2c_bus[0],
				      DENC_A_REG_7 + (0x100 * i), 0x2A098ACB);
	}

	//set picture resolutions
	ret_val = cx25821_i2c_write(&dev->i2c_bus[0], HSCALE_CTRL, 0x0);	//0 - 720
	ret_val = cx25821_i2c_write(&dev->i2c_bus[0], VSCALE_CTRL, 0x0);	//0 - 576

	// set Bypass input format to PAL 625 lines
	value = cx25821_i2c_read(&dev->i2c_bus[0], BYP_AB_CTRL, &tmp);
	value &= 0xFFF7FDFF;
	ret_val = cx25821_i2c_write(&dev->i2c_bus[0], BYP_AB_CTRL, value);

	mutex_unlock(&dev->lock);

	return ret_val;
}

int medusa_set_videostandard(struct cx25821_dev *dev)
{
	int status = STATUS_SUCCESS;
	u32 value = 0, tmp = 0;

	if (dev->tvnorm & V4L2_STD_PAL_BG || dev->tvnorm & V4L2_STD_PAL_DK) {
		status = medusa_initialize_pal(dev);
	} else {
		status = medusa_initialize_ntsc(dev);
	}

	// Enable DENC_A output
	value = cx25821_i2c_read(&dev->i2c_bus[0], DENC_A_REG_4, &tmp);
	value = setBitAtPos(value, 4);
	status = cx25821_i2c_write(&dev->i2c_bus[0], DENC_A_REG_4, value);

	// Enable DENC_B output
	value = cx25821_i2c_read(&dev->i2c_bus[0], DENC_B_REG_4, &tmp);
	value = setBitAtPos(value, 4);
	status = cx25821_i2c_write(&dev->i2c_bus[0], DENC_B_REG_4, value);

	return status;
}

void medusa_set_resolution(struct cx25821_dev *dev, int width,
			   int decoder_select)
{
	int decoder = 0;
	int decoder_count = 0;
	int ret_val = 0;
	u32 hscale = 0x0;
	u32 vscale = 0x0;
	const int MAX_WIDTH = 720;

	mutex_lock(&dev->lock);

	// validate the width - cannot be negative
	if (width > MAX_WIDTH) {
		printk
		    ("cx25821 %s() : width %d > MAX_WIDTH %d ! resetting to MAX_WIDTH \n",
		     __func__, width, MAX_WIDTH);
		width = MAX_WIDTH;
	}

	if (decoder_select <= 7 && decoder_select >= 0) {
		decoder = decoder_select;
		decoder_count = decoder_select + 1;
	} else {
		decoder = 0;
		decoder_count = _num_decoders;
	}

	switch (width) {
	case 320:
		hscale = 0x13E34B;
		vscale = 0x0;
		break;

	case 352:
		hscale = 0x10A273;
		vscale = 0x0;
		break;

	case 176:
		hscale = 0x3115B2;
		vscale = 0x1E00;
		break;

	case 160:
		hscale = 0x378D84;
		vscale = 0x1E00;
		break;

	default:		//720
		hscale = 0x0;
		vscale = 0x0;
		break;
	}

	for (; decoder < decoder_count; decoder++) {
		// write scaling values for each decoder
		ret_val =
		    cx25821_i2c_write(&dev->i2c_bus[0],
				      HSCALE_CTRL + (0x200 * decoder), hscale);
		ret_val =
		    cx25821_i2c_write(&dev->i2c_bus[0],
				      VSCALE_CTRL + (0x200 * decoder), vscale);
	}

	mutex_unlock(&dev->lock);
}

static void medusa_set_decoderduration(struct cx25821_dev *dev, int decoder,
				       int duration)
{
	int ret_val = 0;
	u32 fld_cnt = 0;
	u32 tmp = 0;
	u32 disp_cnt_reg = DISP_AB_CNT;

	mutex_lock(&dev->lock);

	// no support
	if (decoder < VDEC_A && decoder > VDEC_H) {
		mutex_unlock(&dev->lock);
		return;
	}

	switch (decoder) {
	default:
		break;
	case VDEC_C:
	case VDEC_D:
		disp_cnt_reg = DISP_CD_CNT;
		break;
	case VDEC_E:
	case VDEC_F:
		disp_cnt_reg = DISP_EF_CNT;
		break;
	case VDEC_G:
	case VDEC_H:
		disp_cnt_reg = DISP_GH_CNT;
		break;
	}

	_display_field_cnt[decoder] = duration;

	// update hardware
	fld_cnt = cx25821_i2c_read(&dev->i2c_bus[0], disp_cnt_reg, &tmp);

	if (!(decoder % 2))	// EVEN decoder
	{
		fld_cnt &= 0xFFFF0000;
		fld_cnt |= duration;
	} else {
		fld_cnt &= 0x0000FFFF;
		fld_cnt |= ((u32) duration) << 16;
	}

	ret_val = cx25821_i2c_write(&dev->i2c_bus[0], disp_cnt_reg, fld_cnt);

	mutex_unlock(&dev->lock);
}

/////////////////////////////////////////////////////////////////////////////////////////
// Map to Medusa register setting
static int mapM(int srcMin,
		int srcMax, int srcVal, int dstMin, int dstMax, int *dstVal)
{
	int numerator;
	int denominator;
	int quotient;

	if ((srcMin == srcMax) || (srcVal < srcMin) || (srcVal > srcMax)) {
		return -1;
	}
	// This is the overall expression used:
	// *dstVal = (srcVal - srcMin)*(dstMax - dstMin) / (srcMax - srcMin) + dstMin;
	// but we need to account for rounding so below we use the modulus
	// operator to find the remainder and increment if necessary.
	numerator = (srcVal - srcMin) * (dstMax - dstMin);
	denominator = srcMax - srcMin;
	quotient = numerator / denominator;

	if (2 * (numerator % denominator) >= denominator) {
		quotient++;
	}

	*dstVal = quotient + dstMin;

	return 0;
}

static unsigned long convert_to_twos(long numeric, unsigned long bits_len)
{
	unsigned char temp;

	if (numeric >= 0)
		return numeric;
	else {
		temp = ~(abs(numeric) & 0xFF);
		temp += 1;
		return temp;
	}
}

/////////////////////////////////////////////////////////////////////////////////////////
int medusa_set_brightness(struct cx25821_dev *dev, int brightness, int decoder)
{
	int ret_val = 0;
	int value = 0;
	u32 val = 0, tmp = 0;

	mutex_lock(&dev->lock);
	if ((brightness > VIDEO_PROCAMP_MAX)
	    || (brightness < VIDEO_PROCAMP_MIN)) {
		mutex_unlock(&dev->lock);
		return -1;
	}
	ret_val =
	    mapM(VIDEO_PROCAMP_MIN, VIDEO_PROCAMP_MAX, brightness,
		 SIGNED_BYTE_MIN, SIGNED_BYTE_MAX, &value);
	value = convert_to_twos(value, 8);
	val =
	    cx25821_i2c_read(&dev->i2c_bus[0],
			     VDEC_A_BRITE_CTRL + (0x200 * decoder), &tmp);
	val &= 0xFFFFFF00;
	ret_val |=
	    cx25821_i2c_write(&dev->i2c_bus[0],
			      VDEC_A_BRITE_CTRL + (0x200 * decoder),
			      val | value);
	mutex_unlock(&dev->lock);
	return ret_val;
}

/////////////////////////////////////////////////////////////////////////////////////////
int medusa_set_contrast(struct cx25821_dev *dev, int contrast, int decoder)
{
	int ret_val = 0;
	int value = 0;
	u32 val = 0, tmp = 0;

	mutex_lock(&dev->lock);

	if ((contrast > VIDEO_PROCAMP_MAX) || (contrast < VIDEO_PROCAMP_MIN)) {
		mutex_unlock(&dev->lock);
		return -1;
	}

	ret_val =
	    mapM(VIDEO_PROCAMP_MIN, VIDEO_PROCAMP_MAX, contrast,
		 UNSIGNED_BYTE_MIN, UNSIGNED_BYTE_MAX, &value);
	val =
	    cx25821_i2c_read(&dev->i2c_bus[0],
			     VDEC_A_CNTRST_CTRL + (0x200 * decoder), &tmp);
	val &= 0xFFFFFF00;
	ret_val |=
	    cx25821_i2c_write(&dev->i2c_bus[0],
			      VDEC_A_CNTRST_CTRL + (0x200 * decoder),
			      val | value);

	mutex_unlock(&dev->lock);
	return ret_val;
}

/////////////////////////////////////////////////////////////////////////////////////////
int medusa_set_hue(struct cx25821_dev *dev, int hue, int decoder)
{
	int ret_val = 0;
	int value = 0;
	u32 val = 0, tmp = 0;

	mutex_lock(&dev->lock);

	if ((hue > VIDEO_PROCAMP_MAX) || (hue < VIDEO_PROCAMP_MIN)) {
		mutex_unlock(&dev->lock);
		return -1;
	}

	ret_val =
	    mapM(VIDEO_PROCAMP_MIN, VIDEO_PROCAMP_MAX, hue, SIGNED_BYTE_MIN,
		 SIGNED_BYTE_MAX, &value);

	value = convert_to_twos(value, 8);
	val =
	    cx25821_i2c_read(&dev->i2c_bus[0],
			     VDEC_A_HUE_CTRL + (0x200 * decoder), &tmp);
	val &= 0xFFFFFF00;

	ret_val |=
	    cx25821_i2c_write(&dev->i2c_bus[0],
			      VDEC_A_HUE_CTRL + (0x200 * decoder), val | value);

	mutex_unlock(&dev->lock);
	return ret_val;
}

/////////////////////////////////////////////////////////////////////////////////////////
int medusa_set_saturation(struct cx25821_dev *dev, int saturation, int decoder)
{
	int ret_val = 0;
	int value = 0;
	u32 val = 0, tmp = 0;

	mutex_lock(&dev->lock);

	if ((saturation > VIDEO_PROCAMP_MAX)
	    || (saturation < VIDEO_PROCAMP_MIN)) {
		mutex_unlock(&dev->lock);
		return -1;
	}

	ret_val =
	    mapM(VIDEO_PROCAMP_MIN, VIDEO_PROCAMP_MAX, saturation,
		 UNSIGNED_BYTE_MIN, UNSIGNED_BYTE_MAX, &value);

	val =
	    cx25821_i2c_read(&dev->i2c_bus[0],
			     VDEC_A_USAT_CTRL + (0x200 * decoder), &tmp);
	val &= 0xFFFFFF00;
	ret_val |=
	    cx25821_i2c_write(&dev->i2c_bus[0],
			      VDEC_A_USAT_CTRL + (0x200 * decoder),
			      val | value);

	val =
	    cx25821_i2c_read(&dev->i2c_bus[0],
			     VDEC_A_VSAT_CTRL + (0x200 * decoder), &tmp);
	val &= 0xFFFFFF00;
	ret_val |=
	    cx25821_i2c_write(&dev->i2c_bus[0],
			      VDEC_A_VSAT_CTRL + (0x200 * decoder),
			      val | value);

	mutex_unlock(&dev->lock);
	return ret_val;
}

/////////////////////////////////////////////////////////////////////////////////////////
// Program the display sequence and monitor output.
//
int medusa_video_init(struct cx25821_dev *dev)
{
	u32 value = 0, tmp = 0;
	int ret_val = 0;
	int i = 0;

	mutex_lock(&dev->lock);

	_num_decoders = dev->_max_num_decoders;

	// disable Auto source selection on all video decoders
	value = cx25821_i2c_read(&dev->i2c_bus[0], MON_A_CTRL, &tmp);
	value &= 0xFFFFF0FF;
	ret_val = cx25821_i2c_write(&dev->i2c_bus[0], MON_A_CTRL, value);

	if (ret_val < 0) {
		mutex_unlock(&dev->lock);
		return -EINVAL;
	}
	// Turn off Master source switch enable
	value = cx25821_i2c_read(&dev->i2c_bus[0], MON_A_CTRL, &tmp);
	value &= 0xFFFFFFDF;
	ret_val = cx25821_i2c_write(&dev->i2c_bus[0], MON_A_CTRL, value);

	if (ret_val < 0) {
		mutex_unlock(&dev->lock);
		return -EINVAL;
	}

	mutex_unlock(&dev->lock);

	for (i = 0; i < _num_decoders; i++) {
		medusa_set_decoderduration(dev, i, _display_field_cnt[i]);
	}

	mutex_lock(&dev->lock);

	// Select monitor as DENC A input, power up the DAC
	value = cx25821_i2c_read(&dev->i2c_bus[0], DENC_AB_CTRL, &tmp);
	value &= 0xFF70FF70;
	value |= 0x00090008;	// set en_active
	ret_val = cx25821_i2c_write(&dev->i2c_bus[0], DENC_AB_CTRL, value);

	if (ret_val < 0) {
		mutex_unlock(&dev->lock);
		return -EINVAL;
	}
	// enable input is VIP/656
	value = cx25821_i2c_read(&dev->i2c_bus[0], BYP_AB_CTRL, &tmp);
	value |= 0x00040100;	// enable VIP
	ret_val = cx25821_i2c_write(&dev->i2c_bus[0], BYP_AB_CTRL, value);

	if (ret_val < 0) {
		mutex_unlock(&dev->lock);
		return -EINVAL;
	}
	// select AFE clock to output mode
	value = cx25821_i2c_read(&dev->i2c_bus[0], AFE_AB_DIAG_CTRL, &tmp);
	value &= 0x83FFFFFF;
	ret_val =
	    cx25821_i2c_write(&dev->i2c_bus[0], AFE_AB_DIAG_CTRL,
			      value | 0x10000000);

	if (ret_val < 0) {
		mutex_unlock(&dev->lock);
		return -EINVAL;
	}
	// Turn on all of the data out and control output pins.
	value = cx25821_i2c_read(&dev->i2c_bus[0], PIN_OE_CTRL, &tmp);
	value &= 0xFEF0FE00;
	if (_num_decoders == MAX_DECODERS) {
		// Note: The octal board does not support control pins(bit16-19).
		// These bits are ignored in the octal board.
		value |= 0x010001F8;	// disable VDEC A-C port, default to Mobilygen Interface
	} else {
		value |= 0x010F0108;	// disable VDEC A-C port, default to Mobilygen Interface
	}

	value |= 7;
	ret_val = cx25821_i2c_write(&dev->i2c_bus[0], PIN_OE_CTRL, value);
	if (ret_val < 0) {
		mutex_unlock(&dev->lock);
		return -EINVAL;
	}

	mutex_unlock(&dev->lock);

	ret_val = medusa_set_videostandard(dev);

	if (ret_val < 0) {
		mutex_unlock(&dev->lock);
		return -EINVAL;
	}

	return 1;
}