150 lines
4.3 KiB
C
150 lines
4.3 KiB
C
/****************************************************************************
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* boards/arm/gd32f4/gd32f450zk-eval/src/gd32f4xx_sdio.c
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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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 "gd32f4xx.h"
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#include "gd32f450z_eval.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 struct sdio_dev_s *g_sdio_dev;
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#ifdef HAVE_NCD
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static bool g_sd_inserted;
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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: gd32_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 gd32_ncd_interrupt(int irq, void *context)
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{
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bool present;
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present = !gd32_gpio_read(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: gd32_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 gd32_sdio_initialize(void)
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{
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int ret;
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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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*/
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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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g_sd_inserted = !gd32_gpio_read(GPIO_SDMMC1_NCD);
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finfo("Card detect : %d\n", g_sd_inserted);
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sdio_mediachange(g_sdio_dev, g_sd_inserted);
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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 /* CONFIG_MMCSD */
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