/****************************************************************************
 * config/hymini-stm32v/src/up_nsh.c
 * arch/arm/src/board/up_nsh.c
 *
 *   Copyright (C) 2009, 2011 Gregory Nutt. All rights reserved.
 *   Author: Gregory Nutt <gnutt@nuttx.org>
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 * 3. Neither the name NuttX nor the names of its contributors may be
 *    used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 *
 ****************************************************************************/

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

#include <nuttx/config.h>

#include <stdbool.h>
#include <stdio.h>
#include <debug.h>
#include <errno.h>

#ifdef CONFIG_STM32_SPI1
#  include <nuttx/spi.h>
#  include <nuttx/mtd.h>
#endif

#ifdef CONFIG_STM32_SDIO
#  include <nuttx/sdio.h>
#  include <nuttx/mmcsd.h>
#endif

#include "stm32.h"
#include "hymini_stm32v-internal.h"

/****************************************************************************
 * Pre-Processor Definitions
 ****************************************************************************/

/* Configuration ************************************************************/

/* For now, don't build in any SPI1 support -- NSH is not using it */

#undef CONFIG_STM32_SPI1


/* Check if we can have USB device in NSH */

#define NSH_HAVEUSBDEV 1

/* Can't support USB features if USB is not enabled */

#ifndef CONFIG_USBDEV
#  undef NSH_HAVEUSBDEV
#endif

/* Check if we can have MMC/SD slot support in NSH */

#define NSH_HAVEMMCSD  1

/* Can't support MMC/SD features if mountpoints are disabled or if SDIO support
 * is not enabled.
 */

#if defined(CONFIG_DISABLE_MOUNTPOINT) || !defined(CONFIG_STM32_SDIO)
#  undef NSH_HAVEMMCSD
#endif

#ifdef NSH_HAVEMMCSD
#  ifndef CONFIG_NSH_MMCSDMINOR
#    define CONFIG_NSH_MMCSDMINOR 0
#  endif
#  if defined(CONFIG_NSH_MMCSDSLOTNO) && CONFIG_NSH_MMCSDSLOTNO != 0
#    error "Only one MMC/SD slot"
#    undef CONFIG_NSH_MMCSDSLOTNO
#  endif
#  ifndef CONFIG_NSH_MMCSDSLOTNO
#    define CONFIG_NSH_MMCSDSLOTNO 0
#  endif
#endif


/* Debug ********************************************************************/

#ifdef CONFIG_CPP_HAVE_VARARGS
#  ifdef CONFIG_DEBUG
#    define message(...) lowsyslog(__VA_ARGS__)
#  else
#    define message(...) printf(__VA_ARGS__)
#  endif
#else
#  ifdef CONFIG_DEBUG
#    define message lowsyslog
#  else
#    define message printf
#  endif
#endif

/****************************************************************************
 * Private Data
 ****************************************************************************/

#ifdef CONFIG_MMCSD
static FAR struct sdio_dev_s *g_sdiodev;
#endif

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

/****************************************************************************
 * Name: nsh_cdinterrupt
 *
 * Description:
 *   Card detect interrupt handler.
 *
 ****************************************************************************/

#ifdef NSH_HAVEMMCSD
static int nsh_cdinterrupt(int irq, FAR void *context)
{
  static bool inserted = 0xff; /* Impossible value */
  bool present;

  present = !stm32_gpioread(GPIO_SD_CD);
  if (present != inserted)
    {
      sdio_mediachange(g_sdiodev, present);
      inserted = present;
    }

  return OK;
}
#endif

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

/****************************************************************************
 * Name: nsh_archinitialize
 *
 * Description:
 *   Perform architecture specific initialization
 *
 ****************************************************************************/

int nsh_archinitialize(void)
{
#ifdef NSH_HAVEMMCSD
  int ret;

  /* Card detect */
  bool cd_status;

  /* Configure the card detect GPIO */

  stm32_configgpio(GPIO_SD_CD);

  /* Register an interrupt handler for the card detect pin */

  stm32_gpiosetevent(GPIO_SD_CD, true, true, true, nsh_cdinterrupt);

  /* Mount the SDIO-based MMC/SD block driver */

  /* First, get an instance of the SDIO interface */

  message("nsh_archinitialize: Initializing SDIO slot %d\n",
          CONFIG_NSH_MMCSDSLOTNO);
  g_sdiodev = sdio_initialize(CONFIG_NSH_MMCSDSLOTNO);
  if (!g_sdiodev)
    {
      message("nsh_archinitialize: Failed to initialize SDIO slot %d\n",
              CONFIG_NSH_MMCSDSLOTNO);
      return -ENODEV;
    }

  /* Now bind the SDIO interface to the MMC/SD driver */

  message("nsh_archinitialize: Bind SDIO to the MMC/SD driver, minor=%d\n",
          CONFIG_NSH_MMCSDMINOR);
  ret = mmcsd_slotinitialize(CONFIG_NSH_MMCSDMINOR, g_sdiodev);
  if (ret != OK)
    {
      message("nsh_archinitialize: Failed to bind SDIO to the MMC/SD driver: %d\n", ret);
      return ret;
    }
  dbg("nsh_archinitialize: Successfully bound SDIO to the MMC/SD driver\n");
  
  /* Use SD card detect pin to check if a card is inserted */

  cd_status = !stm32_gpioread(GPIO_SD_CD);
  vdbg("Card detect : %hhu\n", cd_status);

  sdio_mediachange(g_sdiodev, cd_status);
#endif
  return OK;
}