/****************************************************************************
 * boards/xtensa/esp32/common/src/esp32_board_spi.c
 *
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.  The
 * ASF licenses this file to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance with the
 * License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
 * License for the specific language governing permissions and limitations
 * under the License.
 *
 ****************************************************************************/

/****************************************************************************
 * Included Files
 ****************************************************************************/

#include <nuttx/config.h>

#include <stdint.h>
#include <stdbool.h>
#include <debug.h>

#include <nuttx/spi/spi.h>
#include <arch/board/board.h>

#include "esp32_gpio.h"

/****************************************************************************
 * Private Functions
 ****************************************************************************/

/****************************************************************************
 * Name: spi_status
 ****************************************************************************/

static inline uint8_t spi_status(struct spi_dev_s *dev, uint32_t devid)
{
  uint8_t status = 0;

#ifdef CONFIG_MMCSD_SPI
  if (devid == SPIDEV_MMCSD(0))
    {
       status |= SPI_STATUS_PRESENT;
    }
#endif

#if defined(CONFIG_LCD_ILI9341) || defined(CONFIG_LCD_SSD1680)
  if (devid == SPIDEV_DISPLAY(0))
    {
       status |= SPI_STATUS_PRESENT;
    }
#endif

  return status;
}

/****************************************************************************
 * Name: spi_cmddata
 ****************************************************************************/

#ifdef CONFIG_SPI_CMDDATA

static inline int spi_cmddata(struct spi_dev_s *dev, uint32_t devid,
                              bool cmd)
{
#if defined(CONFIG_LCD_ILI9341) || defined(CONFIG_LCD_SSD1680) || defined(CONFIG_LCD_ST7789)
  if (devid == SPIDEV_DISPLAY(0))
    {
      /*  This is the Data/Command control pad which determines whether the
       *  data bits are data or a command.
       */

      esp32_gpiowrite(DISPLAY_DC, !cmd);
      return OK;
    }
#endif

  return -ENODEV;
}

#endif

/****************************************************************************
 * Public Functions
 ****************************************************************************/

/****************************************************************************
 * Name: esp32_spi2_status
 ****************************************************************************/

#ifdef CONFIG_ESP32_SPI2

uint8_t esp32_spi2_status(struct spi_dev_s *dev, uint32_t devid)
{
  return spi_status(dev, devid);
}

#endif

/****************************************************************************
 * Name: esp32_spi2_cmddata
 ****************************************************************************/

#if defined(CONFIG_ESP32_SPI2) && defined(CONFIG_SPI_CMDDATA)

int esp32_spi2_cmddata(struct spi_dev_s *dev, uint32_t devid, bool cmd)
{
  spiinfo("devid: %" PRIu32 " CMD: %s\n", devid, cmd ? "command" :
          "data");

  return spi_cmddata(dev, devid, cmd);
}

#endif

/****************************************************************************
 * Name: esp32_spi3_status
 ****************************************************************************/

#ifdef CONFIG_ESP32_SPI3

uint8_t esp32_spi3_status(struct spi_dev_s *dev, uint32_t devid)
{
  return spi_status(dev, devid);
}

#endif

/****************************************************************************
 * Name: esp32_spi3_cmddata
 ****************************************************************************/

#if defined(CONFIG_ESP32_SPI3) && defined(CONFIG_SPI_CMDDATA)

int esp32_spi3_cmddata(struct spi_dev_s *dev, uint32_t devid, bool cmd)
{
  spiinfo("devid: %" PRIu32 " CMD: %s\n", devid, cmd ? "command" :
          "data");

  return spi_cmddata(dev, devid, cmd);
}

#endif