181 lines
5.5 KiB
C
181 lines
5.5 KiB
C
/****************************************************************************
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* config/nucleo-144/src/stm32_sdio.c
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*
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* Copyright (C) 2014, 2016-2017 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <stdbool.h>
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#include <stdio.h>
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#include <debug.h>
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#include <errno.h>
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#include <nuttx/sdio.h>
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#include <nuttx/mmcsd.h>
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#include "chip.h"
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#include "nucleo-144.h"
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#include "stm32l4_gpio.h"
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#include "stm32l4_sdmmc.h"
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#ifdef CONFIG_MMCSD
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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/* Configuration ************************************************************/
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/* Card detections requires card support and a card detection GPIO */
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#define HAVE_NCD 1
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#if !defined(GPIO_SDMMC1_NCD)
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# undef HAVE_NCD
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#endif
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/****************************************************************************
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* Private Data
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****************************************************************************/
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static FAR struct sdio_dev_s *g_sdio_dev;
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#ifdef HAVE_NCD
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static bool g_sd_inserted = 0xff; /* Impossible value */
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#endif
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/****************************************************************************
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* Private Functions
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****************************************************************************/
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/****************************************************************************
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* Name: stm32_ncd_interrupt
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*
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* Description:
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* Card detect interrupt handler.
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*
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****************************************************************************/
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#ifdef HAVE_NCD
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static int stm32l4_ncd_interrupt(int irq, FAR void *context)
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{
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bool present;
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present = !stm32l4_gpioread(GPIO_SDMMC1_NCD);
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if (g_sdio_dev && present != g_sd_inserted)
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{
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sdio_mediachange(g_sdio_dev, present);
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g_sd_inserted = present;
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}
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return OK;
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}
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#endif
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: stm32_sdio_initialize
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*
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* Description:
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* Initialize SDIO-based MMC/SD card support
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*
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****************************************************************************/
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int stm32l4_sdio_initialize(void)
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{
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int ret;
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#ifdef HAVE_NCD
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/* Card detect */
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bool cd_status;
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/* Configure the card detect GPIO */
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stm32l4_configgpio(GPIO_SDMMC1_NCD);
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/* Register an interrupt handler for the card detect pin */
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(void)stm32l4_gpiosetevent(GPIO_SDMMC1_NCD, true, true, true,
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stm32l4_ncd_interrupt, NULL);
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#endif
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/* Mount the SDIO-based MMC/SD block driver */
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/* First, get an instance of the SDIO interface */
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finfo("Initializing SDIO slot %d\n", SDIO_SLOTNO);
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g_sdio_dev = sdio_initialize(SDIO_SLOTNO);
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if (!g_sdio_dev)
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{
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ferr("ERROR: Failed to initialize SDIO slot %d\n", SDIO_SLOTNO);
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return -ENODEV;
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}
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/* Now bind the SDIO interface to the MMC/SD driver */
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finfo("Bind SDIO to the MMC/SD driver, minor=%d\n", SDIO_MINOR);
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ret = mmcsd_slotinitialize(SDIO_MINOR, g_sdio_dev);
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if (ret != OK)
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{
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ferr("ERROR: Failed to bind SDIO to the MMC/SD driver: %d\n", ret);
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return ret;
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}
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finfo("Successfully bound SDIO to the MMC/SD driver\n");
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#ifdef HAVE_NCD
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/* Use SD card detect pin to check if a card is g_sd_inserted */
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cd_status = !stm32l4_gpioread(GPIO_SDMMC1_NCD);
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finfo("Card detect : %d\n", cd_status);
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sdio_mediachange(g_sdio_dev, cd_status);
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#else
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/* Assume that the SD card is inserted. What choice do we have? */
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sdio_mediachange(g_sdio_dev, true);
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#endif
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return OK;
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}
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#endif /* HAVE_SDIO */
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