text: /****************************************************************************
   * 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;
  }
  