emmc_erase.c

/*
 * Copyright (c) 2015-2016, Renesas Electronics Corporation
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 *   - Redistributions of source code must retain the above copyright notice,
 *     this list of conditions and the following disclaimer.
 *
 *   - 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.
 *
 *   - Neither the name of Renesas 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
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 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

/**
 * @file  emmc_erase.c
 * @brief erase api
 *
 */

/* ************************ HEADER (INCLUDE) SECTION *********************** */
#include "emmc_config.h"
#include "emmc_hal.h"
#include "emmc_std.h"
#include "emmc_registers.h"
#include "emmc_def.h"
#include "types.h"

/* ***************** MACROS, CONSTANTS, COMPILATION FLAGS ****************** */

/* ********************** STRUCTURES, TYPE DEFINITIONS ********************* */

/* ********************** DECLARATION OF EXTERNAL DATA ********************* */

/* ************************** FUNCTION PROTOTYPES ************************** */

/* ********************************* CODE ********************************** */

/** @brief function of erase sector
 *
 *
 * - Pre-conditions:<BR>
 * MMC card is mounted.
 *
 * - Post-conditions:<BR>
 * .
 *
 * @param[in,out] buff_address_virtual  virtual address of write data buffer.
 * @param[in] sector_number data address for MMC device (sector number).
 * @param[in] count number of sector.
 * @param[in] transfer_mode Mode of data transfer, DMA or not DMA.
 */
EMMC_ERROR_CODE emmc_erase_sector(
    uint32_t start_address,
    uint32_t end_address
	)
{
    EMMC_ERROR_CODE result;

    /* parameter check */
    if (start_address > end_address)
    {
        emmc_write_error_info(EMMC_FUNCNO_ERASE_SECTOR, EMMC_ERR_PARAM);
        return EMMC_ERR_PARAM;
    }

    /* state check */
    if (mmc_drv_obj.mount != TRUE)
    {
        emmc_write_error_info(EMMC_FUNCNO_ERASE_SECTOR, EMMC_ERR_STATE);
        return EMMC_ERR_STATE;
    }
	/* EXT_CSD[175] ERASE_GROUP_DEF check */
	//if(  )
	
	
    /* CMD35 */
    emmc_make_nontrans_cmd(CMD35_ERASE_GROUP_START, start_address);
    result = emmc_exec_cmd(EMMC_R1_ERROR_MASK, mmc_drv_obj.response);
    if (result != EMMC_SUCCESS)
    {
        return result;
    }

    /* CMD36 */
    emmc_make_nontrans_cmd(CMD36_ERASE_GROUP_END, end_address);
    result = emmc_exec_cmd(EMMC_R1_ERROR_MASK, mmc_drv_obj.response);
    if (result != EMMC_SUCCESS)
    {
        return result;
    }
	
    /* CMD38 */
    emmc_make_nontrans_cmd(CMD38_ERASE, 0);
    result = emmc_exec_cmd(EMMC_R1_ERROR_MASK, mmc_drv_obj.response);
    if (result != EMMC_SUCCESS)
    {
        return result;
    }

	//Figure A.11 - CIM_ERASE_GROUP   CMD13
    /* CMD13 */
    emmc_make_nontrans_cmd(CMD13_SEND_STATUS, EMMC_RCA<<16);
    result = emmc_exec_cmd(EMMC_R1_ERROR_MASK, mmc_drv_obj.response);
    if (result != EMMC_SUCCESS)
    {
        return result;
    }

	/* ready status check */
    if ( (mmc_drv_obj.r1_card_status & EMMC_R1_READY) == 0) 
    {
        emmc_write_error_info(EMMC_FUNCNO_ERASE_SECTOR, EMMC_ERR_CARD_BUSY);
        return EMMC_ERR_CARD_BUSY;
    }

    return EMMC_SUCCESS;
}

/* ******************************** END ************************************ */