#include <stdlib.h>
#include <stdint.h>

#include "platform.h"

#include "eos.h"

#include "board.h"

#include "soc/timer.h"
#include "soc/i2s.h"
#include "eve/eve.h"

#include "eve.h"
#include "gt911.h"
#include "ili9806e.h"

#include "lcd.h"

static int lcd_enable(void) {
    int rv;

    rv = eos_spi_select(EOS_SPI_DEV_EVE);
    if (rv) return rv;

    eve_gpio_set(EVE_GPIO_LCD_EN, 1);
    eos_spi_deselect();

    return EOS_OK;
}

static int lcd_disable(void) {
    int rv;

    rv = eos_spi_select(EOS_SPI_DEV_EVE);
    if (rv) return rv;

    eve_gpio_set(EVE_GPIO_LCD_EN, 0);
    eos_spi_deselect();

    return EOS_OK;
}

static int lcd_select(void) {
    int rv;

    GPIO_REG(GPIO_OUTPUT_XOR)   |=  (1 << SPI_CSPIN_LCD);
    GPIO_REG(GPIO_OUTPUT_VAL)   |=  (1 << SPI_CSPIN_LCD);
    GPIO_REG(GPIO_OUTPUT_EN)    |=  (1 << SPI_CSPIN_LCD);

    rv = eos_spi_select(EOS_SPI_DEV_LCD);
    if (rv) {
        GPIO_REG(GPIO_OUTPUT_EN)    &= ~(1 << SPI_CSPIN_LCD);
        GPIO_REG(GPIO_OUTPUT_XOR)   &= ~(1 << SPI_CSPIN_LCD);
        GPIO_REG(GPIO_OUTPUT_VAL)   &= ~(1 << SPI_CSPIN_LCD);
        return rv;
    }

    return EOS_OK;
}

static void lcd_deselect(void) {
    eos_spi_deselect();
    GPIO_REG(GPIO_OUTPUT_EN)    &= ~(1 << SPI_CSPIN_LCD);
    GPIO_REG(GPIO_OUTPUT_XOR)   &= ~(1 << SPI_CSPIN_LCD);
    GPIO_REG(GPIO_OUTPUT_VAL)   &= ~(1 << SPI_CSPIN_LCD);
}

static int lcd_init(void) {
    int rv;

    rv = lcd_enable();
    if (rv) return rv;

    eos_time_sleep(200);

    rv = lcd_select();
    if (rv) {
        lcd_disable();
        return rv;
    }

    rv = eos_ili9806e_init();
    if (rv == EOS_ERR_ABSENT) eve_lcd_absent();
    lcd_deselect();

    if (rv) lcd_disable();
    return rv;
}

static int lcd_sleep(void) {
    int rv;

    rv = lcd_select();
    if (rv) return rv;

    eos_ili9806e_sleep();
    lcd_deselect();

    rv = lcd_disable();
    if (rv) return rv;

    return EOS_OK;
}

int eos_lcd_init(uint8_t wakeup_cause) {
    int rv;

    rv = lcd_init();
    if (rv) return rv;

    rv = eos_gt911_init(wakeup_cause);
    if (rv) return rv;

    return EOS_OK;
}

int eos_lcd_sleep(void) {
    int rv;

    if (eos_i2s_running()) return EOS_ERR_BUSY;

    /* There is a problem with GT911 and sleep */
    // eos_gt911_sleep();

    rv = lcd_sleep();
    if (rv) return rv;

    return EOS_OK;
}

int eos_lcd_wake(void) {
    int rv;

    if (eos_i2s_running()) return EOS_ERR_BUSY;

    rv = lcd_init();
    if (rv) return rv;

    /* There is a problem with GT911 and sleep */
    // eos_gt911_wake();

    return EOS_OK;
}