/*
 * drivers/display/lcd/lcd_extern/i2c_anx6345.c
 *
 * 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 named License,
 * or 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.
 *
 */

#include <common.h>
#include <malloc.h>
#include <asm/arch/gpio.h>
#ifdef CONFIG_OF_LIBFDT
#include <libfdt.h>
#endif
#include <amlogic/aml_lcd.h>
#include <amlogic/aml_lcd_extern.h>
#include "lcd_extern.h"
#include "i2c_anx6345.h"
#include "../aml_lcd_common.h"
#include "../aml_lcd_reg.h"

#define LCD_EXTERN_NAME			"i2c_ANX6345"
#define LCD_EXTERN_TYPE			LCD_EXTERN_I2C
#define LCD_EXTERN_I2C_ADDR		0x70

//#define LCD_EXT_I2C_PORT_INIT     /* no need init i2c port default */

static struct lcd_extern_config_s *ext_config;

struct lcd_extern_edp_config_s {
	int lane_num;
	int bits;
	int link_rate;
};

static struct lcd_extern_edp_config_s edp_parameter = {
	.lane_num = 1, // 1/2/4
	.bits = 0x00,  // 6bit: 0x00   8bit: 0x10
	.link_rate = 0x0a, //1.62G: 0X06, 2.7G: 0x0a, 5.4G: 0x14
};

static int SP_TX_Write_Reg(unsigned char addr, unsigned char reg, unsigned char data)
{
	unsigned char buff[2];
	int ret;

	buff[0] = reg;
	buff[1] = data;
	addr = (addr >> 1);
	ret = aml_lcd_extern_i2c_write(ext_config->i2c_bus, addr, buff, 2);
	return ret;
}

static int SP_TX_Read_Reg(unsigned char addr, unsigned char reg, unsigned char *data)
{
	int ret;

	*data = reg;
	addr = (addr >> 1);

	ret = aml_lcd_extern_i2c_read(ext_config->i2c_bus, addr, data, 1);
	if (ret < 0)
		return -1;
	else
		return 0;
}
static int SP_TX_Wait_AUX_Finished(void)
{
	unsigned char c;
	unsigned char cCnt = 0;

	SP_TX_Read_Reg(0x70, SP_TX_AUX_STATUS, &c);
	while (c & 0x10) {//aux busy
		cCnt++;
		SP_TX_Read_Reg(0x70, SP_TX_AUX_STATUS, &c);

		if (cCnt > 100)
			return 0; //aux fail
	}

	return 1;//aux ok
}

static int SP_TX_AUX_DPCDRead_Bytes(unsigned char addrh, unsigned char addrm,
		unsigned char addrl,unsigned char cCount,unsigned char *pBuf)
{
	unsigned char c, i;

	//clr buffer
	SP_TX_Write_Reg(0x70, SP_TX_BUF_DATA_COUNT_REG, 0x80);

	//set read cmd and count
	SP_TX_Write_Reg(0x70, SP_TX_AUX_CTRL_REG, (((cCount-1) << 4) | 0x09));

	//set aux address15:0
	SP_TX_Write_Reg(0x70, SP_TX_AUX_ADDR_7_0_REG, addrl);
	SP_TX_Write_Reg(0x70, SP_TX_AUX_ADDR_15_8_REG, addrm);

	//set address19:16 and enable aux
	SP_TX_Read_Reg(0x70, SP_TX_AUX_ADDR_19_16_REG, &c);
	SP_TX_Write_Reg(0x70, SP_TX_AUX_ADDR_19_16_REG, ((c & 0xf0) | addrh));

	//Enable Aux
	SP_TX_Read_Reg(0x70, SP_TX_AUX_CTRL_REG2, &c);
	SP_TX_Write_Reg(0x70, SP_TX_AUX_CTRL_REG2, (c | 0x01));

	mdelay(5);
	if (!SP_TX_Wait_AUX_Finished())
		return 0;

	for (i = 0; i < cCount; i++) {
		SP_TX_Read_Reg(0x70, SP_TX_BUF_DATA_0_REG+i, &c);
		*(pBuf+i) = c;

		if (i >= MAX_BUF_CNT)
			break;
	}

	return 1;//aux ok
}

static int lcd_extern_reg_read(unsigned char reg, unsigned char *buf)
{
	int ret = 0;

	return ret;
}

static int lcd_extern_reg_write(unsigned char *buf, unsigned int len)
{
	int ret = 0;

	return ret;
}

static void anx6345_initialize(void)
{
	unsigned lane_num;
	unsigned link_rate;
	unsigned char bits;
	unsigned char device_id;
	unsigned char temp;
	unsigned char temp1;
	unsigned count = 0;
	unsigned count1 = 0;

	lane_num = edp_parameter.lane_num; //1/2/4 lane
	link_rate = edp_parameter.link_rate; //2.7G
	bits = edp_parameter.bits; //0x00: 6bit;  0x10:8bit
	SP_TX_Write_Reg(0x72, 0x05, 0x00);

	SP_TX_Read_Reg(0x72, 0x01, &device_id);

	if (device_id == 0xaa) {
		if (lcd_debug_print_flag)
			EXTPR("ANX6345 Chip found\n\n");
	} else {
		EXTERR("ANX6345 Chip not found\n\n");
	}

	temp = device_id;
	//if aux read fail, do h/w reset,
	while ((!SP_TX_AUX_DPCDRead_Bytes(0x00, 0x00, 0x00, 1, &temp1)) && (count < 200)) {
		//read fail, h/w reset
		SP_TX_Write_Reg(0x72, 0x06, 0x01);
		SP_TX_Write_Reg(0x72, 0x06, 0x00);
		SP_TX_Write_Reg(0x72, 0x05, 0x00);
		mdelay(10);
		count++;
	}

	//software reset
	SP_TX_Read_Reg(0x72, SP_TX_RST_CTRL_REG, &temp);
	SP_TX_Write_Reg(0x72, SP_TX_RST_CTRL_REG, temp | SP_TX_RST_SW_RST);
	SP_TX_Write_Reg(0x72, SP_TX_RST_CTRL_REG, temp & ~SP_TX_RST_SW_RST);

	SP_TX_Write_Reg(0x70, SP_TX_EXTRA_ADDR_REG, 0x50);//EDID address for AUX access
	SP_TX_Write_Reg(0x70, SP_TX_HDCP_CTRL, 0x00); //disable HDCP polling mode.
	//SP_TX_Write_Reg(0x70, SP_TX_HDCP_CTRL, 0x02); //Enable HDCP polling mode.
	SP_TX_Write_Reg(0x70, SP_TX_LINK_DEBUG_REG, 0x30);//enable M value read out

	//SP_TX_Read_Reg(0x70, SP_TX_DEBUG_REG1, &temp);
	SP_TX_Write_Reg(0x70, SP_TX_DEBUG_REG1, 0x00);//disable polling HPD

	SP_TX_Read_Reg(0x70, SP_TX_HDCP_CONTROL_0_REG, &temp);
	SP_TX_Write_Reg(0x70, SP_TX_HDCP_CONTROL_0_REG, temp | 0x03);//set KSV valid

	SP_TX_Read_Reg(0x70, SP_TX_AUX_CTRL_REG2, &temp);
	SP_TX_Write_Reg(0x70, SP_TX_AUX_CTRL_REG2, temp|0x00);//set double AUX output

	SP_TX_Write_Reg(0x72, SP_COMMON_INT_MASK1, 0xbf);//unmask pll change int
	SP_TX_Write_Reg(0x72, SP_COMMON_INT_MASK2, 0xff);//mask all int
	SP_TX_Write_Reg(0x72, SP_COMMON_INT_MASK3, 0xff);//mask all int
	SP_TX_Write_Reg(0x72, SP_COMMON_INT_MASK4, 0xff);//mask all int

	//reset AUX
	SP_TX_Read_Reg(0x72, SP_TX_RST_CTRL2_REG, &temp);
	SP_TX_Write_Reg(0x72, SP_TX_RST_CTRL2_REG, temp |SP_TX_AUX_RST);
	SP_TX_Write_Reg(0x72, SP_TX_RST_CTRL2_REG, temp & (~SP_TX_AUX_RST));

	//Chip initialization

	SP_TX_Write_Reg(0x70, SP_TX_SYS_CTRL1_REG, 0x00);
	mdelay(10);

	SP_TX_Write_Reg(0x72, SP_TX_VID_CTRL2_REG, bits);

	//ANX6345 chip analog setting
	SP_TX_Write_Reg(0x70, SP_TX_PLL_CTRL_REG, 0x00); //UPDATE: FROM 0X07 TO 0X00

	//ANX chip analog setting
	//SP_TX_Write_Reg(0x72, ANALOG_DEBUG_REG1, 0x70); //UPDATE: FROM 0XF0 TO 0X70
	SP_TX_Write_Reg(0x70, SP_TX_LINK_DEBUG_REG, 0x30);

	//force HPD
	SP_TX_Write_Reg(0x70, SP_TX_SYS_CTRL3_REG, 0x30);

	/* enable ssc function */
	SP_TX_Write_Reg(0x70, 0xA7, 0x00); // disable SSC first
	SP_TX_Write_Reg(0x70, 0xD0, 0x5f); // ssc d  0.4%, f0/4 mode
	SP_TX_Write_Reg(0x70, 0xD1, 0x00);
	SP_TX_Write_Reg(0x70, 0xD2, 0x75); // ctrl_th
	SP_TX_Read_Reg(0x70, 0xA7, &temp);
	SP_TX_Write_Reg(0x70, 0xA7, temp | 0x10); // enable SSC
	SP_TX_Read_Reg(0x72, 0x07, &temp); //reset SSC
	SP_TX_Write_Reg(0x72, 0x07, temp | 0x80);
	SP_TX_Write_Reg(0x72, 0x07, temp & (~0x80));

	//Select 2.7G
	SP_TX_Write_Reg(0x70, SP_TX_LINK_BW_SET_REG, link_rate); //2.7g:0x0a;1.62g:0x06
	//Select 2 lanes
	SP_TX_Write_Reg(0x70, 0xa1, lane_num);

	SP_TX_Write_Reg(0x70, SP_TX_LINK_TRAINING_CTRL_REG, SP_TX_LINK_TRAINING_CTRL_EN);
	mdelay(5);
	SP_TX_Read_Reg(0x70, SP_TX_LINK_TRAINING_CTRL_REG, &temp);
	/* UPDATE: FROM 0X01 TO 0X80 */
	while ((temp & 0x80) != 0) {
		//debug_puts("Waiting...\n");
		mdelay(5);
		count1 ++;
		if (count1 > 100) {
			EXTERR("ANX6345 Link training fail\n");
			break;
		}
		SP_TX_Read_Reg(0x70, SP_TX_LINK_TRAINING_CTRL_REG, &temp);
	}

	SP_TX_Write_Reg(0x72, 0x12, 0x2c);
	SP_TX_Write_Reg(0x72, 0x13, 0x06);
	SP_TX_Write_Reg(0x72, 0x14, 0x00);
	SP_TX_Write_Reg(0x72, 0x15, 0x06);
	SP_TX_Write_Reg(0x72, 0x16, 0x02);
	SP_TX_Write_Reg(0x72, 0x17, 0x04);
	SP_TX_Write_Reg(0x72, 0x18, 0x26);
	SP_TX_Write_Reg(0x72, 0x19, 0x50);
	SP_TX_Write_Reg(0x72, 0x1a, 0x04);
	SP_TX_Write_Reg(0x72, 0x1b, 0x00);
	SP_TX_Write_Reg(0x72, 0x1c, 0x04);
	SP_TX_Write_Reg(0x72, 0x1d, 0x18);
	SP_TX_Write_Reg(0x72, 0x1e, 0x00);
	SP_TX_Write_Reg(0x72, 0x1f, 0x10);
	SP_TX_Write_Reg(0x72, 0x20, 0x00);
	SP_TX_Write_Reg(0x72, 0x21, 0x28);

	SP_TX_Write_Reg(0x72, 0x11, 0x03);
	//enable BIST. In normal mode, don't need to config this reg
	//if want to open BIST,must setting right dat 0x11-0x21 base lcd timing.
	//SP_TX_Write_Reg(0x72, 0x0b, 0x09);//colorbar:08,graystep:09
	SP_TX_Write_Reg(0x72, 0x08, 0x81); //SDR:0x81;DDR:0x8f

	//force HPD and stream valid
	SP_TX_Write_Reg(0x70, 0x82, 0x33);

	if (lcd_debug_print_flag)
		EXTPR("%s\n", __func__);
}

static unsigned char DP_TX_Read_Reg(unsigned char addr, unsigned char reg)
{
	int ret;
	unsigned char *data;

	data = &reg;
	addr = (addr >> 1);
	ret = aml_lcd_extern_i2c_read(ext_config->i2c_bus, addr, data, 1);
	if (ret < 0)
		return -1;
	else
		return *data;
}

static void test_clk(void)
{
	unsigned char val;

	val = DP_TX_Read_Reg(0x70, 0x80); //clk detect
	if (lcd_debug_print_flag)
		EXTPR("clk detect: %2x\n", val);

	val = DP_TX_Read_Reg(0x70, 0x81); //clk change
	if (lcd_debug_print_flag)
		EXTPR("clk change: %2x\nwait for 100ms...\n", val);

	SP_TX_Write_Reg(0x70, 0x81, 0x40);
	mdelay(100);
	val = DP_TX_Read_Reg(0x70, 0x81); //clk change
	if (lcd_debug_print_flag)
		EXTPR("clk change: %2x\n\n", val);
}

static void test_anx9804(void)
{
	unsigned char val;

	if (lcd_debug_print_flag)
		EXTPR("\nenter anx9804 test\n");

	test_clk();

	val = DP_TX_Read_Reg(0x72, 0x23); //video status
	if (lcd_debug_print_flag)
		EXTPR("video status: %2x\n\n", val);

	val = DP_TX_Read_Reg(0x72, 0x24); //total lines low
	if (lcd_debug_print_flag)
		EXTPR("total lines low: %2x\n", val);
	val = DP_TX_Read_Reg(0x72, 0x25); //total lines high
	if (lcd_debug_print_flag)
		EXTPR("total lines high: %2x\n", val);
	val = DP_TX_Read_Reg(0x72, 0x26); //active lines low
	if (lcd_debug_print_flag)
		EXTPR("active lines low: %2x\n", val);
	val = DP_TX_Read_Reg(0x72, 0x27); //active lines high
	if (lcd_debug_print_flag)
		EXTPR("active lines high: %2x\n", val);
	val = DP_TX_Read_Reg(0x72, 0x29); //vertical sync width
	if (lcd_debug_print_flag)
		EXTPR("vsync width: %2x\n", val);
	val = DP_TX_Read_Reg(0x72, 0x2a); //vertical back porch
	if (lcd_debug_print_flag)
		EXTPR("vertical back porch: %2x\n\n", val);

	val = DP_TX_Read_Reg(0x72, 0x2b); //total pixels low
	if (lcd_debug_print_flag)
		EXTPR("total pixels low: %2x\n", val);
	val = DP_TX_Read_Reg(0x72, 0x2c); //total pixels high
	if (lcd_debug_print_flag)
		EXTPR("total pixels high: %2x\n", val);
	val = DP_TX_Read_Reg(0x72, 0x2d); //active pixels low
	if (lcd_debug_print_flag)
		EXTPR("active pixels low: %2x\n", val);
	val = DP_TX_Read_Reg(0x72, 0x2e); //active pixels high
	if (lcd_debug_print_flag)
		EXTPR("active pixels high: %2x\n", val);
	val = DP_TX_Read_Reg(0x72, 0x31); //horizon sync width low
	if (lcd_debug_print_flag)
		EXTPR("hsync width low: %2x\n", val);
	val = DP_TX_Read_Reg(0x72, 0x32); //horizon sync width high
	if (lcd_debug_print_flag)
		EXTPR("hsync width high: %2x\n", val);
	val = DP_TX_Read_Reg(0x72, 0x33); //horizon back porch low
	if (lcd_debug_print_flag)
		EXTPR("horizon back porch low: %2x\n", val);
	val = DP_TX_Read_Reg(0x72, 0x34); //horizon back porch high
	if (lcd_debug_print_flag)
		EXTPR("horizon back porch high: %2x\n\n", val);
}

static int lcd_extern_i2c_init(void)
{
	anx6345_initialize();

	if (lcd_debug_print_flag)
		test_anx9804();

	return 0;
}

static int lcd_extern_i2c_remove(void)
{
	int ret = 0;

	return ret;
}

static int lcd_extern_power_on(void)
{
	int ret = 0;

	aml_lcd_extern_pinmux_set(1);
#ifdef LCD_EXT_I2C_PORT_INIT
	aml_lcd_extern_i2c_bus_change(ext_config->i2c_bus);
#endif

	ret = lcd_extern_i2c_init();

#ifdef LCD_EXT_I2C_PORT_INIT
	aml_lcd_extern_i2c_bus_recovery();
#endif

	return ret;
}

static int lcd_extern_power_off(void)
{
	int ret = 0;

#ifdef LCD_EXT_I2C_PORT_INIT
	aml_lcd_extern_i2c_bus_change(ext_config->i2c_bus);
#endif

	ret = lcd_extern_i2c_remove();

#ifdef LCD_EXT_I2C_PORT_INIT
	aml_lcd_extern_i2c_bus_recovery();
#endif
	aml_lcd_extern_pinmux_set(0);

	return ret;
}

static int lcd_extern_driver_update(struct aml_lcd_extern_driver_s *ext_drv)
{
	if (ext_drv == NULL) {
		EXTERR("%s driver is null\n", LCD_EXTERN_NAME);
		return -1;
	}

	ext_drv->reg_read  = lcd_extern_reg_read;
	ext_drv->reg_write = lcd_extern_reg_write;
	ext_drv->power_on  = lcd_extern_power_on;
	ext_drv->power_off = lcd_extern_power_off;

	return 0;
}

#ifdef CONFIG_OF_LIBFDT
static int aml_lcd_extern_get_dt_config(int index)
{
	int nodeoffset;
	char *propdata;
	int value;

	nodeoffset = aml_lcd_extern_get_dts_child(index);
	if (nodeoffset < 0) {
		return -1;
	}

	propdata = aml_lcd_extern_get_dts_prop(nodeoffset, "lane_num");
	if (propdata == NULL) {
		edp_parameter.lane_num = 1;
		EXTERR("%s failed to get lane_num\n", LCD_EXTERN_NAME);
	} else {
		edp_parameter.lane_num = (unsigned short)(be32_to_cpup((u32*)propdata));
	}
	if (lcd_debug_print_flag)
		EXTPR("lane_num = %d\n", edp_parameter.lane_num);

	propdata = aml_lcd_extern_get_dts_prop(nodeoffset, "bits");
	if (propdata == NULL) {
		edp_parameter.bits = 0x00;
		EXTERR("%s failed to get bits\n", LCD_EXTERN_NAME);
	} else {
		value = be32_to_cpup((u32*)propdata);
		if (value == 0)
			edp_parameter.bits = 0x00;
		else if  (value == 1)
			edp_parameter.bits = 0x10;
		else
			edp_parameter.bits = 0x00;
	}
	if (lcd_debug_print_flag)
		EXTPR("bits = %d\n", edp_parameter.bits);

	propdata = aml_lcd_extern_get_dts_prop(nodeoffset, "link_rate");
	if (propdata == NULL) {
		edp_parameter.link_rate = 0x0a;
		EXTERR("%s failed to get link_rate\n", LCD_EXTERN_NAME);
	} else {
		value = be32_to_cpup((u32*)propdata);
		if (value == 0)
			edp_parameter.link_rate = 0x06;
		else if (value == 1)
			edp_parameter.link_rate = 0x0a;
		else if (value == 2)
			edp_parameter.link_rate = 0x14;
		else
			edp_parameter.link_rate = 0x0a;
	}
	if (lcd_debug_print_flag)
		EXTPR("link_rate = 0x%02x\n", edp_parameter.link_rate);
	return 0;
}
#endif

int aml_lcd_extern_i2c_anx6345_probe(struct aml_lcd_extern_driver_s *ext_drv)
{
	int ret = 0;

	ext_config = ext_drv->config;
#ifdef CONFIG_OF_LIBFDT
	aml_lcd_extern_get_dt_config(ext_drv->config->index);
#endif
	ret = lcd_extern_driver_update(ext_drv);

	if (lcd_debug_print_flag)
		EXTPR("%s: %d\n", __func__, ret);
	return ret;
}