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177 lines
5.3 KiB
177 lines
5.3 KiB
/**************************************************************************** |
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* |
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* Copyright (C) 2014, 2016 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 <board_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 "board_config.h" |
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#include "stm32_gpio.h" |
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#include "stm32_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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/* 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 *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 stm32_ncd_interrupt(int irq, FAR void *context) |
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{ |
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bool present; |
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present = !stm32_gpioread(GPIO_SDMMC1_NCD); |
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if (sdio_dev && present != g_sd_inserted) { |
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sdio_mediachange(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 stm32_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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stm32_configgpio(GPIO_SDMMC1_NCD); |
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/* Register an interrupt handler for the card detect pin */ |
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stm32_gpiosetevent(GPIO_SDMMC1_NCD, true, true, true, stm32_ncd_interrupt); |
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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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sdio_dev = sdio_initialize(SDIO_SLOTNO); |
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if (!sdio_dev) { |
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syslog(LOG_ERR, "[boot] 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, sdio_dev); |
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if (ret != OK) { |
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syslog(LOG_ERR, "[boot] 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 = !stm32_gpioread(GPIO_SDMMC1_NCD); |
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finfo("Card detect : %d\n", cd_status); |
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sdio_mediachange(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(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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