mmc.c

intel xscale pxa270的完整wince4.2 BSP包

/*****************************************************************************
* FileName: MMC.C - MMC interface driver
*
* SanDisk Host Developer's Toolkit
*
* Copyright (c) 1997 - 1999 SanDisk Corporation
* All rights reserved.
* This code may not be redistributed in source or linkable object form
* without the consent of its author.
*
* Description:
*
*       MMC Interface driver routines.
*
******************************************************************************/

#include "sdmmc.h"


/****************************************************************************/
/*******************************  MMC INTERFACE  ****************************/
/****************************************************************************/

/*****************************************************************************
* Name: mmc_init
*
* Processing:
*       Initialize data structure for MMC controller and
*       start up devices on the selected bus
*
* Input:
*       None
*
* Output:
*       Internal data structures are configured
*
* Returns:
*       YES if successful
*       NO if failure
*       
*****************************************************************************/
SDBOOL mmc_init( SDVOID ) /*__fn__*/
{
    INT16 i;

//	RETAILMSG(1, (TEXT("mmc_init is entered\r\n")));
        /* Clear internal drive structure */
        clear_controller_structure();

        /* Initialize the MMC hardware in known state. */
        for (i = 0; i < N_INTERFACES; i++)
        mmc_hw_init(i);

        /* Put all devices in READY STATE. */
        /* This is part of the IDENTIFICATION STATE process. */
//		RETAILMSG(1, (TEXT("Before mmc_init_setup() is entered\r\n")));
        return (mmc_init_setup());
}



/*****************************************************************************
* Name: mmc_drive_open
*
* Processing:
*       Set up internal data structure and configure the system.
*
* Entries:
*       INT16   driveno         Driver number
*
* Returns:
*       YES if successful
*       NO if failure
*       
*****************************************************************************/
SDBOOL mmc_drive_open ( INT16 driveno ) /*__fn__*/
{
    return(mmedia_drive_open(driveno));
}



/*****************************************************************************
* Name: mmc_drive_close
*
* Processing:
*       Release internal data structure and restore memory configuration
*
* Entries:
*       INT16   driveno         Driver number
*
* Returns:
*       YES if successful
*       NO if failure
*       
*****************************************************************************/
SDBOOL mmc_drive_close ( INT16 driveno ) /*__fn__*/
{
    return(mmedia_drive_close(driveno));
}


/*****************************************************************************
* Name: mmc_read_serial
*
* Processing:
*       Get the drive geometry information.
*
* Entries:
*       INT16           driveno         Driver number
*       PDRV_GEOMETRY_DESC idDrvPtr     Pointer to the drive geometry struture
*
* Returns:
*       YES if successful
*       NO if failure
*       
*****************************************************************************/
SDBOOL mmc_read_serial(INT16 driveno, PDRV_GEOMETRY_DESC idDrvPtr) /* __fn__*/
{
    return(mmedia_read_serial(driveno, idDrvPtr));
}


/*****************************************************************************
* Name: mmc_read
*
* Processing:
*       Get data from the drive at the requested LBA.
*
* Entries:
*       INT16   driveno         Driver number
*
* Returns:
*       YES if successful
*       NO if failure
*       
*****************************************************************************/
SDBOOL mmc_read(INT16 driveno, ULONG startingSector, UCHAR *buff, UCOUNT numSectors) /*__fn__*/
{
    if (mmedia_io(driveno, startingSector, buff, numSectors, READING))
        return (NO);

    return(YES);
}


/*****************************************************************************
* Name: mmc_write
*
* Processing:
*       Send information to the specific location on the drive.
*
* Entries:
*       INT16   driveno         Driver number
*
* Returns:
*       YES if successful
*       NO if failure
*       
*****************************************************************************/
SDBOOL mmc_write(INT16 driveno, ULONG startingSector, UCHAR *buff, UCOUNT numSectors) /*__fn__*/
{
        if (mmedia_io(driveno, startingSector, buff, numSectors, WRITING))
        return (NO);

    return(YES);
}



/*****************************************************************************
* Name: mmc_erase
*
* Processing:
*       Clear the LBA to make it ready for the next write
*
* Entries:
*       INT16   driveno         Driver number
*
* Returns:
*       YES if successful
*       NO if failure
*       
*****************************************************************************/
SDBOOL mmc_erase(INT16 driveno, ULONG startingSector, UCOUNT numSectors) /*__fn__*/
{
        if (mmedia_io(driveno, startingSector, SDNULL, numSectors, ERASING))
        return (NO);

    return(YES);
}