Landzo_K60Z_WebServer/src/sdhc_host.c

/*
 * Copyright (c) 2016, Freescale Semiconductor, Inc.
 * Copyright 2016-2017 NXP
 *
 * Redistribution and use in source and binary forms, with or without modification,
 * are permitted provided that the following conditions are met:
 *
 * o Redistributions of source code must retain the above copyright notice, this list
 *   of conditions and the following disclaimer.
 *
 * o 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.
 *
 * o Neither the name of the copyright holder 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 HOLDER 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.
 */

#include "FreeRTOS.h"
#include "board.h"
#include "fsl_host.h"
#include "fsl_port.h"
#include "semphr.h"
#include "task.h"

/*******************************************************************************
 * Definitions
 ******************************************************************************/

/*******************************************************************************
 * Prototypes
 ******************************************************************************/

/*******************************************************************************
 * Variables
 ******************************************************************************/
static sdhc_handle_t g_sdhcHandle;
static uint32_t      g_sdhcAdmaTable[SDHC_ADMA_TABLE_WORDS];
static volatile bool g_sdhcTransferSuccessFlag = true;

static SemaphoreHandle_t s_cd_semphr       = NULL;
static SemaphoreHandle_t s_transfer_semphr = NULL;

/*******************************************************************************
 * Code
 ******************************************************************************/

static bool DetectCardByHost(void) {
    if (SDHC->PRSSTAT & SDHC_PRSSTAT_CINS_MASK) {
        return true;
    }

    return false;
}

/* Card detect. */
status_t CardInsertDetect(HOST_TYPE *hostBase) {
    if (DetectCardByHost() == true) {
        return kStatus_Success;
    }

    SDHC_EnableInterruptSignal(SDHC, kSDHC_CardDetectFlag);

    for (;;) {
        if (xSemaphoreTake(s_cd_semphr, portMAX_DELAY) == pdPASS) {
            if (DetectCardByHost() == true) {
                break;
            }
        }
    }

    /* Delay some time to make card stable. */
    vTaskDelay(pdMS_TO_TICKS(1000));

    return kStatus_Success;
}

/* Card detect pin port interrupt handler. */
void CardInsertDetectHandle(void) {
    BaseType_t task_woken;

    SDHC_DisableInterruptSignal(SDHC, kSDHC_CardDetectFlag);

    if (s_cd_semphr == NULL) return;

    xSemaphoreGiveFromISR(s_cd_semphr, &task_woken);

    portYIELD_FROM_ISR(task_woken);
}

/* SDHC transfer complete callback function. */
static void SDHC_TransferCompleteCallback(SDHC_Type *base, sdhc_handle_t *handle, status_t status, void *userData) {
    if (status == kStatus_Success) {
        g_sdhcTransferSuccessFlag = true;
    } else {
        g_sdhcTransferSuccessFlag = false;
    }

    BaseType_t task_woken;

    xSemaphoreGiveFromISR(s_transfer_semphr, &task_woken);

    portYIELD_FROM_ISR(task_woken);
}

/* User defined transfer function. */
static status_t SDHC_TransferFunction(SDHC_Type *base, sdhc_transfer_t *content) {
    status_t error = kStatus_Success;

    do {
        error = SDHC_TransferNonBlocking(base, &g_sdhcHandle, g_sdhcAdmaTable, SDHC_ADMA_TABLE_WORDS, content);
    } while (error == kStatus_SDHC_BusyTransferring);

    if (error != kStatus_Success) {
        return kStatus_Fail;
    }

    if (xSemaphoreTake(s_transfer_semphr, pdMS_TO_TICKS(1000)) != pdPASS) {
        return kStatus_Fail;
    }

    if (!g_sdhcTransferSuccessFlag) {
        return kStatus_Fail;
    }

    return error;
}

status_t HOST_Init(void *host) {
    sdhc_transfer_callback_t sdhcCallback = {0};
    sdhc_host_t             *sdhcHost     = (sdhc_host_t *)host;

    NVIC_SetPriority(SDHC_IRQn, 6);

    /* Initializes SDHC. */
    sdhcHost->config.cardDetectDat3      = true;
    sdhcHost->config.endianMode          = SDHC_ENDIAN_MODE;
    sdhcHost->config.dmaMode             = SDHC_DMA_MODE;
    sdhcHost->config.readWatermarkLevel  = SDHC_READ_WATERMARK_LEVEL;
    sdhcHost->config.writeWatermarkLevel = SDHC_WRITE_WATERMARK_LEVEL;
    SDHC_Init(sdhcHost->base, &(sdhcHost->config));

    /* Create handle for SDHC driver */
    sdhcCallback.TransferComplete = SDHC_TransferCompleteCallback;
    sdhcCallback.CardInserted     = CardInsertDetectHandle;
    sdhcCallback.CardRemoved      = CardInsertDetectHandle;
    SDHC_TransferCreateHandle(sdhcHost->base, &g_sdhcHandle, &sdhcCallback, NULL);

    /* Create transfer complete event. */
    s_cd_semphr = xSemaphoreCreateBinary();
    if (s_cd_semphr == NULL) {
        return kStatus_Fail;
    }

    s_transfer_semphr = xSemaphoreCreateBinary();
    if (s_transfer_semphr == NULL) {
        return kStatus_Fail;
    }

    /* Define transfer function. */
    sdhcHost->transfer = SDHC_TransferFunction;

    return kStatus_Success;
}

void HOST_Deinit(void *host) {
    sdhc_host_t *sdhcHost = (sdhc_host_t *)host;
    SDHC_Deinit(sdhcHost->base);
    vSemaphoreDelete(s_cd_semphr);
    vSemaphoreDelete(s_transfer_semphr);
}