nuttx/boards/arm/stm32f7/nucleo-144/src/stm32_sdio.c
Xiang Xiao a3c9b413d8 arch/arm: Remove FAR and CODE from board folder(2)
Signed-off-by: Xiang Xiao <xiaoxiang@xiaomi.com>
2022-05-03 16:50:52 +03:00

166 lines
4.6 KiB
C

/****************************************************************************
* boards/arm/stm32f7/nucleo-144/src/stm32_sdio.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 <stdbool.h>
#include <stdio.h>
#include <debug.h>
#include <errno.h>
#include <nuttx/sdio.h>
#include <nuttx/mmcsd.h>
#include "chip.h"
#include "nucleo-144.h"
#include "stm32_gpio.h"
#include "stm32_sdmmc.h"
#ifdef CONFIG_MMCSD
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
/* Configuration ************************************************************/
/* Card detections requires card support and a card detection GPIO */
#define HAVE_NCD 1
#if !defined(GPIO_SDMMC1_NCD)
# undef HAVE_NCD
#endif
/****************************************************************************
* Private Data
****************************************************************************/
static struct sdio_dev_s *g_sdio_dev;
#ifdef HAVE_NCD
static bool g_sd_inserted = 0xff; /* Impossible value */
#endif
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Name: stm32_ncd_interrupt
*
* Description:
* Card detect interrupt handler.
*
****************************************************************************/
#ifdef HAVE_NCD
static int stm32_ncd_interrupt(int irq, void *context)
{
bool present;
present = !stm32_gpioread(GPIO_SDMMC1_NCD);
if (g_sdio_dev && present != g_sd_inserted)
{
sdio_mediachange(g_sdio_dev, present);
g_sd_inserted = present;
}
return OK;
}
#endif
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: stm32_sdio_initialize
*
* Description:
* Initialize SDIO-based MMC/SD card support
*
****************************************************************************/
int stm32_sdio_initialize(void)
{
int ret;
#ifdef HAVE_NCD
/* Card detect */
bool cd_status;
/* Configure the card detect GPIO */
stm32_configgpio(GPIO_SDMMC1_NCD);
/* Register an interrupt handler for the card detect pin */
stm32_gpiosetevent(GPIO_SDMMC1_NCD, true, true, true,
stm32_ncd_interrupt, NULL);
#endif
/* Mount the SDIO-based MMC/SD block driver */
/* First, get an instance of the SDIO interface */
finfo("Initializing SDIO slot %d\n", SDIO_SLOTNO);
g_sdio_dev = sdio_initialize(SDIO_SLOTNO);
if (!g_sdio_dev)
{
ferr("ERROR: Failed to initialize SDIO slot %d\n", SDIO_SLOTNO);
return -ENODEV;
}
/* Now bind the SDIO interface to the MMC/SD driver */
finfo("Bind SDIO to the MMC/SD driver, minor=%d\n", SDIO_MINOR);
ret = mmcsd_slotinitialize(SDIO_MINOR, g_sdio_dev);
if (ret != OK)
{
ferr("ERROR: Failed to bind SDIO to the MMC/SD driver: %d\n", ret);
return ret;
}
finfo("Successfully bound SDIO to the MMC/SD driver\n");
#ifdef HAVE_NCD
/* Use SD card detect pin to check if a card is g_sd_inserted */
cd_status = !stm32_gpioread(GPIO_SDMMC1_NCD);
finfo("Card detect : %d\n", cd_status);
sdio_mediachange(g_sdio_dev, cd_status);
#else
/* Assume that the SD card is inserted. What choice do we have? */
sdio_mediachange(g_sdio_dev, true);
#endif
return OK;
}
#endif /* HAVE_SDIO */