csl_atawritecommandregs.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_ataWriteCommandRegs.c
 *
 *  @brief File for functional layer of CSL API CSL_ataWriteCommandRegs()
 *
 *  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_ataWriteCommandRegs
 *
 *   @b Description
 *   @n It writes into all the command registers.
 *
 *   @b Arguments
 *   @verbatim
            hAta            Handle to the ATA

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

            CSL_ataWriteCommandRegs (hAta, &cmdRegs);
            ...

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

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

    *(Uint16 *)(addr + (int)CSL_ATA_CMDREGWR_DATA)  = cmdRegs->DATA;
    addr[CSL_ATA_CMDREGWR_FEATURES]        = cmdRegs->FEATURES;
    addr[CSL_ATA_CMDREGWR_SECTORCOUNT]     = cmdRegs->SECTORCOUNT;
    addr[CSL_ATA_CMDREGWR_SECTORNUMBER]    = cmdRegs->SECTORNUMBER;
    addr[CSL_ATA_CMDREGWR_CYLINDERLOW]     = cmdRegs->CYLINDERLOW;
    addr[CSL_ATA_CMDREGWR_CYLINDERHIGH]    = cmdRegs->CYLINDERHIGH;
    addr[CSL_ATA_CMDREGWR_DEVICEHEAD]      = cmdRegs->DEVICEHEAD;
    addr[CSL_ATA_CMDREGWR_COMMAND]         = cmdRegs->COMMAND;

    return cmdRegs;
}