csl_atareadcommandregs.c

TI达芬奇dm644x各硬件模块测试代码

/*  ============================================================================
 *   Copyright (c) Texas Instruments Inc 2002, 2003, 2004, 2005
 *
 *   Use of this software is controlled by the terms and conditions found in the
 *   license agreement under which this software has been supplied.
 *   ===========================================================================
 */

/** @file  csl_ataReadCommandRegs.c
 *
 *  @brief File for functional layer of CSL API CSL_ataReadCommandRegs()
 *
 *  Path: \\(CSLPATH)\\ipmodules\\ata\\src
 *
 */

/* =============================================================================
 *  Revision History
 *  ===============
 *  08-Oct-2004 kpn Updated according to review comments
 *  24-Sep-2004 kpn Updated according to CSL Upgradation guidelines.
 *  ============================================================================
 */

#include <csl_ata.h>

/** ============================================================================
 *   @n@b CSL_ataReadCommandRegs
 *
 *   @b Description
 *   @n It reads all the command registers.
 *
 *   @b Arguments
 *   @verbatim
            hAta            Handle to the ATA

            cmdRegs         Pointer to the CSL_AtaCommandBlockRead structure
     @endverbatim
 *
 *   <b> Return Value </b>
 *   @n  CSL_AtaCommandBlockRead  cmdRegs
 *
 *   <b> Pre Condition </b>
 *   @n  None
 *
 *   <b> Post Condition </b>
 *   @n  The cmdRegs structure is populated with the command registers values.
 *
 *   @b Modifies
 *   @n cmdRegs variable
 *
 *   @b Example
 *   @verbatim
            CSL_AtaHandle            hAta;
            CSL_AtaCommandBlockRead  cmdRegs;
            ...

            CSL_ataReadCommandRegs (hAta, &cmdRegs);
            ...

     @endverbatim
 *  ============================================================================
 */
CSL_AtaCommandBlockRead * CSL_ataReadCommandRegs (
    CSL_AtaHandle            hAta,
    CSL_AtaCommandBlockRead *cmdRegs
)
{
    register volatile Uint8 *addr = 0;

    addr = (hAta->ataNum == CSL_ATA_PRIMARY) ?
           CSL_ATA_CMDREGS_PRIMARY : CSL_ATA_CMDREGS_SECONDARY;

    cmdRegs->DATA           = *(Uint16 *)(addr + (int)CSL_ATA_CMDREGRD_DATA);
    cmdRegs->ERROR          = addr[CSL_ATA_CMDREGRD_ERROR];
    cmdRegs->SECTORCOUNT    = addr[CSL_ATA_CMDREGRD_SECTORCOUNT];
    cmdRegs->SECTORNUMBER   = addr[CSL_ATA_CMDREGRD_SECTORNUMBER];
    cmdRegs->CYLINDERLOW    = addr[CSL_ATA_CMDREGRD_CYLINDERLOW];
    cmdRegs->CYLINDERHIGH   = addr[CSL_ATA_CMDREGRD_CYLINDERHIGH];
    cmdRegs->DEVICEHEAD     = addr[CSL_ATA_CMDREGRD_DEVICEHEAD];
    cmdRegs->STATUS         = addr[CSL_ATA_CMDREGRD_STATUS];

    return cmdRegs;
}