gtdma.c

sbc7410的vxworksbsp

/*******************************************************************************
*                   Copyright 2002, GALILEO TECHNOLOGY, LTD.                   *
* THIS CODE CONTAINS CONFIDENTIAL INFORMATION OF MARVELL.                      *
* NO RIGHTS ARE GRANTED HEREIN UNDER ANY PATENT, MASK WORK RIGHT OR COPYRIGHT  *
* OF MARVELL OR ANY THIRD PARTY. MARVELL RESERVES THE RIGHT AT ITS SOLE        *
* DISCRETION TO REQUEST THAT THIS CODE BE IMMEDIATELY RETURNED TO MARVELL.     *
* THIS CODE IS PROVIDED "AS IS". MARVELL MAKES NO WARRANTIES, EXPRESSED,       *
* IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY, COMPLETENESS OR PERFORMANCE.   *
*                                                                              *
* MARVELL COMPRISES MARVELL TECHNOLOGY GROUP LTD. (MTGL) AND ITS SUBSIDIARIES, *
* MARVELL INTERNATIONAL LTD. (MIL), MARVELL TECHNOLOGY, INC. (MTI), MARVELL    *
* SEMICONDUCTOR, INC. (MSI), MARVELL ASIA PTE LTD. (MAPL), MARVELL JAPAN K.K.  *
* (MJKK), GALILEO TECHNOLOGY LTD. (GTL) AND GALILEO TECHNOLOGY, INC. (GTI).    *
********************************************************************************
* gtDma.c - DMA functions and definitions
*
* DESCRIPTION:
*     This file gives the user a complete interface to the powerful DMA engines,
*     including functions for controling the priority mechanism.
*     To fully understand the capabilities of the DMA engines please spare some
*     time to go trough the spec.
*
* DEPENDENCIES:
*       None.
*
*******************************************************************************/

/* includes */
#include "drv/gtDma/gtDma.h"
#include <vxWorks.h>
#include "wrSbc7410.h"

#define NONE_CACHEABLE(address) (address) 

#define GT_REG_WRITE(offset, data) GT64260_REG_WR(offset, data)
#define GT_REG_READ(offset,data)    GT64260_REG_RD(offset,data)

#define GT_WRITE_WORD(address, data)  \
        ((*((volatile unsigned int *)NONE_CACHEABLE((address)))) = \
        ((unsigned int)(data)))


#ifndef UINT32
    #define UINT32 unsigned int
#endif

#ifndef EIEIO
#define EIEIO                     WRS_ASM (" eieio")
#endif

#define GT_WORD_SWAP(x) LONGSWAP(x)

#define VIRTUAL_TO_PHY(address) ((unsigned int)address)
#define PHY_TO_VIRTUAL(address) ((unsigned int)address)

#define GT_SET_REG_BITS(regOffset,bits)                                        \
        ((*((volatile unsigned int*)(NONE_CACHEABLE(GT64260_BASE_ADRS) |   \
        (regOffset)))) |= ((unsigned int)GT_WORD_SWAP(bits)))




/*******************************************************************************
* gtDmaCommand - Writes a command to a DMA engine.
*
* DESCRIPTION:
*       This function writes a command to a specific DMA engine.
*       The command defines the mode in which the engine will work in.
*       There are several commands and thay are all defind in gtDma.h.
*       It is possible to combine several commands using the or ( | ) operation.
*     NOTE:
*       This function will not enable the DMA transfer unless the
*       CHANNEL_ENABLE command is combined within the command parameter.
*
* INPUT:
*       engine  - One of the possible engines as defind in gtDma.h
*       command - The command to be written to the given engine number . 
*                 All possible Values are defined in gtDma.h and can be for 
*                 example (for more details please refer to the GT data sheet at
*                 the IDMA section): 
*
*                 - DMA_HOLD_SOURCE_ADDR.
*                 - DMA_HOLD_DEST_ADDR.
*                 - DMA_DTL_8BYTES
*                 - DMA_DTL_16BYTES.
*                   etc.
* OUTPUT:
*       None.
*
* RETURN:
*       true on success, false on erroneous parameter..
*
*******************************************************************************/
bool gtDmaCommand(DMA_ENGINE engine,unsigned int command)
{
    unsigned int    offset=0;

    if(IS_INVALID_ENGINE(engine)) 
        return false;
    if (engine > DMA_ENG_3 ) 
        offset = 0x100;       /* Access to the four additional gtDma engine. */
	GT_REG_WRITE(DMA_CH0_CTRL_L + (engine % 4)*4 + offset,command);
    return true;
}

/*******************************************************************************
* gtDmaTransfer - Transfer data from sourceAddr to destAddr by a DMA engine.
*
* DESCRIPTION:
*       This function simplifies the usage of the powerful DMA engines. It 
*       transfers the desired amount of data (憂umOfBytes