/*
 * drivers/amlogic/media/vout/lcd/lcd_extern/ext_default.c
 *
 * Copyright (C) 2015 Amlogic, Inc. All rights reserved.
 *
 * 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.,
 * 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 */

#include <common.h>
#include <malloc.h>
#include <asm/arch/gpio.h>
#include <fdtdec.h>
#include <amlogic/media/vout/lcd/aml_lcd.h>
#include <amlogic/media/vout/lcd/lcd_extern.h>
#include "lcd_extern.h"
#include "../lcd_common.h"
#include "../lcd_reg.h"

#define LCD_EXTERN_NAME           "ext_default"

static struct lcd_extern_config_s *ext_config;
static unsigned char spi_gpio_cs = 0xff;
static unsigned char spi_gpio_clk = 0xff;
static unsigned char spi_gpio_data = 0xff;

static void set_lcd_csb(unsigned int v)
{
	lcd_ext_gpio_set(spi_gpio_cs, v);
	udelay(ext_config->spi_delay_us);
}

static void set_lcd_scl(unsigned int v)
{
	lcd_ext_gpio_set(spi_gpio_clk, v);
	udelay(ext_config->spi_delay_us);
}

static void set_lcd_sda(unsigned int v)
{
	lcd_ext_gpio_set(spi_gpio_data, v);
	udelay(ext_config->spi_delay_us);
}

static void spi_gpio_init(void)
{
	set_lcd_csb(1);
	set_lcd_scl(1);
	set_lcd_sda(1);
}

static void spi_gpio_off(void)
{
	set_lcd_sda(0);
	set_lcd_scl(0);
	set_lcd_csb(0);
}

static void spi_write_byte(unsigned char data)
{
	int i;

	for (i = 0; i < 8; i++) {
		set_lcd_scl(0);
		if (data & 0x80)
			set_lcd_sda(1);
		else
			set_lcd_sda(0);
		data <<= 1;
		set_lcd_scl(1);
	}
}

static int lcd_extern_spi_write(unsigned char *buf, int len)
{
	int i;

	if (len < 2) {
		EXTERR("%s: len %d error\n", __func__, len);
		return -1;
	}

	set_lcd_csb(0);

	for (i = 0; i < len; i++)
		spi_write_byte(buf[i]);

	set_lcd_csb(1);
	set_lcd_scl(1);
	set_lcd_sda(1);
	udelay(ext_config->spi_delay_us);

	return 0;
}

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 reg, unsigned char value)
{
	int ret = 0;

	return ret;
}

static int lcd_extern_power_cmd_dynamic_size(unsigned char *table, int flag)
{
	int i = 0, j = 0, max_len = 0, step = 0;
	unsigned char type, cmd_size;
	int delay_ms, ret = 0;

	if (flag)
		max_len = ext_config->table_init_on_cnt;
	else
		max_len = ext_config->table_init_off_cnt;

	switch (ext_config->type) {
	case LCD_EXTERN_I2C:
		while ((i + 1) < max_len) {
			type = table[i];
			if (type == LCD_EXT_CMD_TYPE_END)
				break;
			if (lcd_debug_print_flag) {
				EXTPR("%s: step %d: type=0x%02x, cmd_size=%d\n",
					__func__, step, type, table[i+1]);
			}
			cmd_size = table[i+1];
			if (cmd_size == 0)
				goto power_cmd_dynamic_i2c_next;
			if ((i + 2 + cmd_size) > max_len)
				break;

			if (type == LCD_EXT_CMD_TYPE_NONE) {
				/* do nothing */
			} else if (type == LCD_EXT_CMD_TYPE_GPIO) {
				if (cmd_size < 2) {
					EXTERR("step %d: invalid cmd_size %d for GPIO\n",
						step, cmd_size);
					goto power_cmd_dynamic_i2c_next;
				}
				lcd_ext_gpio_set(table[i+2], table[i+3]);
				if (cmd_size > 2) {
					if (table[i+4] > 0)
						mdelay(table[i+4]);
				}
			} else if (type == LCD_EXT_CMD_TYPE_DELAY) {
				delay_ms = 0;
				for (j = 0; j < cmd_size; j++)
					delay_ms += table[i+2+j];
				if (delay_ms > 0)
					mdelay(delay_ms);
			} else if (type == LCD_EXT_CMD_TYPE_CMD) {
				ret = lcd_extern_i2c_write(ext_config->i2c_bus,
					ext_config->i2c_addr,
					&table[i+2], cmd_size);
			} else if (type == LCD_EXT_CMD_TYPE_CMD2) {
				ret = lcd_extern_i2c_write(ext_config->i2c_bus,
					ext_config->i2c_addr2,
					&table[i+2], cmd_size);
			} else if (type == LCD_EXT_CMD_TYPE_CMD_DELAY) {
				ret = lcd_extern_i2c_write(ext_config->i2c_bus,
					ext_config->i2c_addr,
					&table[i+2], (cmd_size-1));
				if (table[i+1+cmd_size] > 0)
					mdelay(table[i+1+cmd_size]);
			} else if (type == LCD_EXT_CMD_TYPE_CMD2_DELAY) {
				ret = lcd_extern_i2c_write(ext_config->i2c_bus,
					ext_config->i2c_addr2,
					&table[i+2], (cmd_size - 1));
				if (table[i+1+cmd_size] > 0)
					mdelay(table[i+1+cmd_size]);
			} else {
				EXTERR("%s: %s(%d): type 0x%02x invalid\n",
					__func__, ext_config->name,
					ext_config->index, type);
			}
power_cmd_dynamic_i2c_next:
			i += (cmd_size + 2);
			step++;
		}
		break;
	case LCD_EXTERN_SPI:
		while ((i + 1) < max_len) {
			type = table[i];
			if (type == LCD_EXT_CMD_TYPE_END)
				break;
			if (lcd_debug_print_flag) {
				EXTPR("%s: step %d: type=0x%02x, cmd_size=%d\n",
					__func__, step, type, table[i+1]);
			}
			cmd_size = table[i+1];
			if (cmd_size == 0)
				goto power_cmd_dynamic_spi_next;
			if ((i + 2 + cmd_size) > max_len)
				break;

			if (type == LCD_EXT_CMD_TYPE_NONE) {
				/* do nothing */
			} else if (type == LCD_EXT_CMD_TYPE_GPIO) {
				if (cmd_size < 2) {
					EXTERR("step %d: invalid cmd_size %d for GPIO\n",
						step, cmd_size);
					goto power_cmd_dynamic_spi_next;
				}
				lcd_ext_gpio_set(table[i+2], table[i+3]);
				if (cmd_size > 2) {
					if (table[i+4] > 0)
						mdelay(table[i+4]);
				}
			} else if (type == LCD_EXT_CMD_TYPE_DELAY) {
				delay_ms = 0;
				for (j = 0; j < cmd_size; j++)
					delay_ms += table[i+2+j];
				if (delay_ms > 0)
					mdelay(delay_ms);
			} else if (type == LCD_EXT_CMD_TYPE_CMD) {
				ret = lcd_extern_spi_write(&table[i+2], cmd_size);
			} else if (type == LCD_EXT_CMD_TYPE_CMD_DELAY) {
				ret = lcd_extern_spi_write(&table[i+2], (cmd_size-1));
				if (table[i+1+cmd_size] > 0)
					mdelay(table[i+1+cmd_size]);
			} else {
				EXTERR("%s: %s(%d): type 0x%02x invalid\n",
					__func__, ext_config->name,
					ext_config->index, type);
			}
power_cmd_dynamic_spi_next:
			i += (cmd_size + 2);
			step++;
		}
		break;
	default:
		EXTERR("%s: %s(%d): extern_type %d is not support\n",
			__func__, ext_config->name,
			ext_config->index, ext_config->type);
		break;
	}

	return ret;
}

static int lcd_extern_power_cmd_fixed_size(unsigned char *table, int flag)
{
	int i = 0, j, max_len = 0, step = 0;
	unsigned char type, cmd_size;
	int delay_ms, ret = 0;

	cmd_size = ext_config->cmd_size;
	if (cmd_size < 2) {
		EXTERR("%s: invalid cmd_size %d\n", __func__, cmd_size);
		return -1;
	}

	if (flag)
		max_len = ext_config->table_init_on_cnt;
	else
		max_len = ext_config->table_init_off_cnt;

	switch (ext_config->type) {
	case LCD_EXTERN_I2C:
		while ((i + cmd_size) <= max_len) {
			type = table[i];
			if (type == LCD_EXT_CMD_TYPE_END)
				break;
			if (lcd_debug_print_flag) {
				EXTPR("%s: step %d: type=0x%02x, cmd_size=%d\n",
					__func__, step, type, cmd_size);
			}
			if (type == LCD_EXT_CMD_TYPE_NONE) {
				/* do nothing */
			} else if (type == LCD_EXT_CMD_TYPE_GPIO) {
				lcd_ext_gpio_set(table[i+1], table[i+2]);
				if (cmd_size > 3) {
					if (table[i+3] > 0)
						mdelay(table[i+3]);
				}
			} else if (type == LCD_EXT_CMD_TYPE_DELAY) {
				delay_ms = 0;
				for (j = 0; j < (cmd_size - 1); j++)
					delay_ms += table[i+1+j];
				if (delay_ms > 0)
					mdelay(delay_ms);
			} else if (type == LCD_EXT_CMD_TYPE_CMD) {
				ret = lcd_extern_i2c_write(ext_config->i2c_bus,
					ext_config->i2c_addr,
					&table[i+1], (cmd_size-1));
			} else if (type == LCD_EXT_CMD_TYPE_CMD2) {
				ret = lcd_extern_i2c_write(ext_config->i2c_bus,
					ext_config->i2c_addr2,
					&table[i+1], (cmd_size-1));
			} else if (type == LCD_EXT_CMD_TYPE_CMD_DELAY) {
				ret = lcd_extern_i2c_write(ext_config->i2c_bus,
					ext_config->i2c_addr,
					&table[i+1], (cmd_size-2));
				if (table[i+cmd_size-1] > 0)
					mdelay(table[i+cmd_size-1]);
			} else if (type == LCD_EXT_CMD_TYPE_CMD2_DELAY) {
				ret = lcd_extern_i2c_write(ext_config->i2c_bus,
					ext_config->i2c_addr2,
					&table[i+1], (cmd_size-2));
				if (table[i+cmd_size-1] > 0)
					mdelay(table[i+cmd_size-1]);
			} else {
				EXTERR("%s: %s(%d): type 0x%02x invalid\n",
					__func__, ext_config->name,
					ext_config->index, type);
			}
			i += cmd_size;
			step++;
		}
		break;
	case LCD_EXTERN_SPI:
		while ((i + cmd_size) <= max_len) {
			type = table[i];
			if (type == LCD_EXT_CMD_TYPE_END)
				break;
			if (lcd_debug_print_flag) {
				EXTPR("%s: step %d: type=0x%02x, cmd_size=%d\n",
					__func__, step, type, cmd_size);
			}
			if (type == LCD_EXT_CMD_TYPE_NONE) {
				/* do nothing */
			} else if (type == LCD_EXT_CMD_TYPE_GPIO) {
				lcd_ext_gpio_set(table[i+1], table[i+2]);
				if (cmd_size > 3) {
					if (table[i+3] > 0)
						mdelay(table[i+3]);
				}
			} else if (type == LCD_EXT_CMD_TYPE_DELAY) {
				delay_ms = 0;
				for (j = 0; j < (cmd_size - 1); j++)
					delay_ms += table[i+1+j];
				if (delay_ms > 0)
					mdelay(delay_ms);
			} else if (type == LCD_EXT_CMD_TYPE_CMD) {
				ret = lcd_extern_spi_write(&table[i+1], (cmd_size-1));
			} else if (type == LCD_EXT_CMD_TYPE_CMD_DELAY) {
				ret = lcd_extern_spi_write(&table[i+1], (cmd_size-2));
				if (table[i+cmd_size-1] > 0)
					mdelay(table[i+cmd_size-1]);
			} else {
				EXTERR("%s: %s(%d): type 0x%02x invalid\n",
					__func__, ext_config->name,
					ext_config->index, type);
			}
			i += cmd_size;
			step++;
		}
		break;
	default:
		EXTERR("%s: %s(%d): extern_type %d is not support\n",
			__func__, ext_config->name,
			ext_config->index, ext_config->type);
		break;
	}

	return ret;
}

static int lcd_extern_power_ctrl(int flag)
{
	unsigned char *table;
	int cmd_size;
	int ret = 0;

	/* step 1: power prepare */
	if (ext_config->type == LCD_EXTERN_SPI)
		spi_gpio_init();

	/* step 2: power cmd */
	cmd_size = ext_config->cmd_size;
	if (flag)
		table = ext_config->table_init_on;
	else
		table = ext_config->table_init_off;
	if (cmd_size < 1) {
		EXTERR("%s: cmd_size %d is invalid\n", __func__, cmd_size);
		ret = -1;
		goto power_ctrl_next;
	}
	if (table == NULL) {
		EXTERR("%s: init_table %d is NULL\n", __func__, flag);
		ret = -1;
		goto power_ctrl_next;
	}

	if (cmd_size == LCD_EXT_CMD_SIZE_DYNAMIC)
		ret = lcd_extern_power_cmd_dynamic_size(table, flag);
	else
		ret = lcd_extern_power_cmd_fixed_size(table, flag);

power_ctrl_next:
	/* step 3: power finish */
	if (ext_config->type == LCD_EXTERN_SPI)
		spi_gpio_off();

	if (ret) {
		EXTERR("%s: %s(%d): %d\n", __func__, ext_config->name,
			ext_config->index, flag);
	} else {
		EXTPR("%s: %s(%d): %d\n", __func__, ext_config->name,
			ext_config->index, flag);
	}
	return ret;
}

static int lcd_extern_power_on(void)
{
	int ret;

	lcd_extern_pinmux_set(1);
	ret = lcd_extern_power_ctrl(1);
	return ret;
}

static int lcd_extern_power_off(void)
{
	int ret;

	ret = lcd_extern_power_ctrl(0);
	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;
	}
	if (ext_drv->config->table_init_loaded == 0) {
		EXTERR("%s: tablet_init is invalid\n", ext_drv->config->name);
		return -1;
	}

	spi_gpio_cs = ext_drv->common->spi_gpio_cs;
	spi_gpio_clk = ext_drv->common->spi_gpio_clk;
	spi_gpio_data = ext_drv->common->spi_gpio_data;

	if (ext_drv->config->type == LCD_EXTERN_SPI)
		ext_drv->config->spi_delay_us = 1000 / ext_drv->config->spi_clk_freq;

	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;
}

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

	ext_config = ext_drv->config;
	ret = lcd_extern_driver_update(ext_drv);

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