/****************************************************************************
* config/kwikstik-k40/src/up_nsh.c
* arch/arm/src/board/up_nsh.c
*
* Copyright (C) 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_KINETIS_SDHC
# include <nuttx/sdio.h>
# include <nuttx/mmcsd.h>
#endif
#include "kinetis_internal.h"
#include "kwikstik-internal.h"
/****************************************************************************
* Pre-Processor Definitions
****************************************************************************/
/* Configuration ************************************************************/
/* PORT and SLOT number probably depend on the board configuration */
#ifdef CONFIG_ARCH_BOARD_KWIKSTIK_K40
# define NSH_HAVEUSBDEV 1
# define NSH_HAVEMMCSD 1
# if defined(CONFIG_NSH_MMCSDSLOTNO) && CONFIG_NSH_MMCSDSLOTNO != 0
# error "Only one MMC/SD slot, slot 0"
# undef CONFIG_NSH_MMCSDSLOTNO
# endif
# ifndef CONFIG_NSH_MMCSDSLOTNO
# define CONFIG_NSH_MMCSDSLOTNO 0
# endif
#else
/* Add configuration for new Kinetis boards here */
# error "Unrecognized Kinetis board"
# undef NSH_HAVEUSBDEV
# undef NSH_HAVEMMCSD
#endif
/* Can't support USB features if USB is not enabled */
#ifndef CONFIG_USBDEV
# undef NSH_HAVEUSBDEV
#endif
/* Can't support MMC/SD features if mountpoints are disabled or if SDHC support
* is not enabled.
*/
#if defined(CONFIG_DISABLE_MOUNTPOINT) || !defined(CONFIG_KINETIS_SDHC)
# undef NSH_HAVEMMCSD
#endif
#ifndef CONFIG_NSH_MMCSDMINOR
# define CONFIG_NSH_MMCSDMINOR 0
#endif
/* We expect to receive GPIO interrupts for card insertion events */
#ifndef CONFIG_GPIO_IRQ
# error "CONFIG_GPIO_IRQ required for card detect interrupt"
#endif
#ifndef CONFIG_KINETIS_PORTEINTS
# error "CONFIG_KINETIS_PORTEINTS required for card detect interrupt"
#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 Types
****************************************************************************/
/* This structure encapsulates the global variable used in this file and
* reduces the probability of name collistions.
*/
#ifdef NSH_HAVEMMCSD
struct kinetis_nsh_s
{
FAR struct sdio_dev_s *sdhc; /* SDIO driver handle */
bool inserted; /* True: card is inserted */
};
#endif
/****************************************************************************
* Private Data
****************************************************************************/
#ifdef NSH_HAVEMMCSD
static struct kinetis_nsh_s g_nsh;
#endif
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Name: kinetis_mediachange
****************************************************************************/
#ifdef NSH_HAVEMMCSD
static void kinetis_mediachange(void)
{
bool inserted;
/* Get the current value of the card detect pin. This pin is pulled up on
* board. So low means that a card is present.
*/
inserted = !kinetis_gpioread(GPIO_SD_CARDDETECT);
/* Has the pin changed state? */
if (inserted != g_nsh.inserted)
{
/* Yes.. perform the appropriate action (this might need some debounce). */
g_nsh.inserted = inserted;
sdhc_mediachange(g_nsh.sdhc, inserted);
}
}
#endif
/****************************************************************************
* Name: kinetis_cdinterrupt
****************************************************************************/
#ifdef NSH_HAVEMMCSD
static int kinetis_cdinterrupt(int irq, FAR void *context)
{
/* All of the work is done by kinetis_mediachange() */
kinetis_mediachange();
return OK;
}
#endif
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: nsh_archinitialize
*
* Description:
* Perform architecture specific initialization
*
****************************************************************************/
int nsh_archinitialize(void)
{
#ifdef NSH_HAVEMMCSD
int ret;
/* Configure GPIO pins.
*
* First CD power. The initial state will provide SD power.
*/
kinetis_pinconfig(GPIO_SD_CARDON); /* Applies power to the card */
/* Attached the card detect interrupt (but don't enable it yet) */
kinetis_pinconfig(GPIO_SD_CARDDETECT);
kinetis_pinirqattach(GPIO_SD_CARDDETECT, kinetis_cdinterrupt);
/* Mount the SDHC-based MMC/SD block driver */
/* First, get an instance of the SDHC interface */
message("nsh_archinitialize: Initializing SDHC slot %d\n",
CONFIG_NSH_MMCSDSLOTNO);
g_nsh.sdhc = sdhc_initialize(CONFIG_NSH_MMCSDSLOTNO);
if (!g_nsh.sdhc)
{
message("nsh_archinitialize: Failed to initialize SDHC slot %d\n",
CONFIG_NSH_MMCSDSLOTNO);
return -ENODEV;
}
/* Now bind the SDHC interface to the MMC/SD driver */
message("nsh_archinitialize: Bind SDHC to the MMC/SD driver, minor=%d\n",
CONFIG_NSH_MMCSDMINOR);
ret = mmcsd_slotinitialize(CONFIG_NSH_MMCSDMINOR, g_nsh.sdhc);
if (ret != OK)
{
message("nsh_archinitialize: Failed to bind SDHC to the MMC/SD driver: %d\n", ret);
return ret;
}
message("nsh_archinitialize: Successfully bound SDHC to the MMC/SD driver\n");
/* Handle the initial card state */
kinetis_mediachange();
/* Enable CD interrupts to handle subsequent media changes */
kinetis_pinirqenable(GPIO_SD_CARDDETECT);
#endif
return OK;
}
