nand.c

windows mobile 6.13 dnldr下载源码

/*******************************************************************************
 * Copyright:   Copyright (c) 2007. Hisilicon Technologies, CO., LTD.
 * Version:     V300R001B02
 * Filename:    nand.c
 * Description: FMD驱动NANDC子模块功能实现文件
 * History:
                1.Created by chenbiyao on 2007/04/09
*******************************************************************************/
#include "nand.h"


/*FLASH中断事件*/
HANDLE g_hFlashEvent     = (HANDLE)100;

volatile NANDC_REG *g_pstNandcReg = NULL;
BYTE* g_pcDataBuf                 = NULL;

/*中断状态值*/
DWORD g_dwIntStatus      = 0;

/*长数据的位宽*/
DWORD g_dwNandLongAddr   = 0;

FLASH_CHIP_STRU g_stFlashChipInfo;


/*******************************************************************************
  Function:     NF_WRITE_CMD
  Description:  本接口用于向指定PORT口写命令字
  Input:        1、PORT地址
                2、命令字
  Output:       none
  Return：      none
  History:
                1. Created by chenbiyao on 2006/04/09
                2. .....
*******************************************************************************/
#define NF_WRITE_CMD(portAddr,cmd); (portAddr)=(cmd);

/*******************************************************************************
  Function:     NF_GetMutex
  Description:  本接口用于获得信号量操作
  Input:        句柄
  Output:       none
  Return：      FMD_SUCCESS:操作成功;
                其他:操作不成功;
  History:
                1. Created by chenbiyao on 2006/04/09
                2. .....
*******************************************************************************/
static DWORD NF_GetMutex(HANDLE hHandle)
{
    UINT32 dwTick;

    dwTick = GetSysTimer();
    while(0 == (g_pstNandcReg->NANDC_INTSTATUS & g_pstNandcReg->NANDC_INTEN))
    {
        if(GetPassedMicSec(dwTick) > 2 ms)
        {
            break;
        }
    }
    g_dwIntStatus = g_pstNandcReg->NANDC_INTSTATUS;
    /*清除相应的中断位;*/
    NF_WRITE_CMD(g_pstNandcReg->NANDC_INTCLR,g_dwIntStatus);

    return FMD_SUCCESS;
}

/*******************************************************************************
  Function:     NF_ReleaseMutex
  Description:  本接口用于释放信号量操作
  Input:        信号量句柄
  Output:       none
  Return：      none
  History:
                1. Created by chenbiyao on 2006/04/09
                2. .....
*******************************************************************************/
static VOID NF_ReleaseMutex(HANDLE hMutex)
{
}

/*******************************************************************************
  Function:     NF_CreateMutex
  Description:  本接口用于创建信号量
  Input:        none
  Output:       信号量句柄
  Return：      none
  History:
                1. Created by chenbiyao on 2006/04/09
                2. .....
*******************************************************************************/
static VOID NF_CreateMutex(PHANDLE pHandle)
{
     *pHandle = (HANDLE)1;/*区别两个HANDLE*/
}


/*******************************************************************************
  Function:     NF_Init
  Description:  本接口用于初始化NANDC控制寄存器,创建FLASH操作信号量和FLASH事件,启动中断处理任务
  Input:        none
  Output:       none
  Return：      FMD_SUCCESS:操作成功;
                其他:操作不成功;
  History:
                1. Created by chenbiyao on 2006/04/09
                2. .....
*******************************************************************************/
DWORD NF_Init(DWORD *pdwFlashID)
{
    DWORD   ret       = 0;

    /*对寄存器基地址与数据缓冲区首地址进行地址映射*/
    if(NULL == g_pcDataBuf)
    {
    #ifdef RUN_IN_WINDOWS_MOBILE
        g_pcDataBuf = (PBYTE)OALPAtoVA(g_stFlashChipInfo.dwNandcBaseAddr, FALSE);
        if(NULL == g_pcDataBuf)
        {
            return NF_MEMMAP_ERROR;
        }
    #else
        g_pcDataBuf = (PBYTE)g_stFlashChipInfo.dwNandcBaseAddr;
    #endif

        g_pstNandcReg =  (PNANDC_REG)((DWORD)g_pcDataBuf + NANDC_REG_ADDR);
    }

    /*初始化等待控制寄存器*/
    NF_WRITE_CMD(g_pstNandcReg->NANDC_WSC, NANDC_WSC_CONFIG);

    /*初始化器件配置寄存器(BYTE_PER_PAGE_2K|IO_WIDTH_8_BIT);*/
#ifndef HARDWARE_READY
    {
        NF_WRITE_CMD(g_pstNandcReg->NANDC_DEVICECFG, BYTE_PER_PAGE_2K|IO_WIDTH_8_BIT);
    }
#endif

    /*去使能flashlock*/
    NF_WRITE_CMD(g_pstNandcReg->NANDC_LOCKEN, 0xFFFFFFFC);

    /*调用NF_ReadID读取FLASH的ID号;*/
    ret = NF_ReadID(pdwFlashID);
    if(FMD_SUCCESS != ret)
    {
        return ret;
    }

    if(K5E2G1GACM == *pdwFlashID)
    {
        g_stFlashChipInfo.TotalBlockNumbers = (DWORD)BLOCKS_NUM_2048;
        g_stFlashChipInfo.dwAddrShift = 0;
        g_stFlashChipInfo.dwStatusBits = 1;
    }
    else if(MT29F2G16ABD == *pdwFlashID)
    {
        g_stFlashChipInfo.TotalBlockNumbers = (DWORD)BLOCKS_NUM_2048;
        g_stFlashChipInfo.dwAddrShift = 1;
        g_stFlashChipInfo.dwStatusBits = 2;
        NF_WRITE_CMD(g_pstNandcReg->NANDC_DEVICECFG, BYTE_PER_PAGE_2K|IO_WIDTH_16_BIT);
    }
    else
    {
        OALMSG(ZONE_FMD_ERR, (TEXT("[ERROR NANDFMD] can not support this flash ID = 0x%x.\r\n"), *pdwFlashID));
        return NF_NOT_SUPP_ERROR;
    }
    if(g_stFlashChipInfo.TotalBlockNumbers*g_stFlashChipInfo.BlockSize < FLASHSIZE_2GBIT)
    {
        g_dwNandLongAddr = NF_ADDR_4BITS;
    }
    else
    {
        g_dwNandLongAddr = NF_ADDR_5BITS;
    }

    OALMSG(ZONE_FMD_OPS, (TEXT("[Info NANDFMD] FLASH ID = 0x%x.\r\n"), *pdwFlashID));
    return FMD_SUCCESS;
}

/*******************************************************************************
  Function:     NF_Init
  Description:  本接口用于释放NANDC控制器工作所需的资源
  Input:        none
  Output:       none
  Return：      none
  History:
                1. Created by chenbiyao on 2006/04/09
                2. .....
*******************************************************************************/
VOID NF_Deinit(VOID)
{
    /*unmap地址*/
    //MmUnmapIoSpace(g_pcDataBuf, NF_DATA_BUFFER_LENGTH);//??
    g_pcDataBuf = NULL;
    g_pstNandcReg = NULL;
}

/*******************************************************************************
  Function:     NF_ReadID
  Description:  本接口用于读取NAND FLASH的ID信息
  Input:        none
  Output:       ID号;
  Return：      FMD_SUCCESS:操作成功;
                其他:操作不成功;
  History:
                1. Created by chenbiyao on 2006/04/09
                2. .....
*******************************************************************************/
DWORD NF_ReadID(PDWORD pIDBuf)
{
    DWORD  ret     = 0;
    WORD   cStatus = 0;

    /*禁止ECC Check和ECC Correct,禁止LSD的ECC Check,工作于NORMAL模式*/
    NF_WRITE_CMD(g_pstNandcReg->NANDC_BUFCFG, NORMAL_MODE|ECC_DATA_CHECK_DISABLE|ECC_LSN_CHECK_DISABLE|ECC_CORRECT_DISABLE);
    /*清除所有中断位;*/
    NF_WRITE_CMD(g_pstNandcReg->NANDC_INTCLR,0xFFFFFFFF);
    /*向命令配置寄存器写入当前命令格式(单命令);*/
    NF_WRITE_CMD(g_pstNandcReg->NANDC_CMDCFG, NF_SINGLE_CMD|NF_STATE_RUN|NF_READ_MODE|NF_ADD_CYC_1BIT);
    /*配置数据读写数目寄存器(5个字节);*/
    NF_WRITE_CMD(g_pstNandcReg->NANDC_DATANUM, NF_ID_LENGTH);
    /*配置中断使能寄存器(读中断);*/
    NF_WRITE_CMD(g_pstNandcReg->NANDC_INTEN, READ_DONE_INT_BIT);

    NF_WRITE_CMD(g_pstNandcReg->NANDC_ADDRL, 0);
    NF_WRITE_CMD(g_pstNandcReg->NANDC_ADDRH, 0);

    /*向命令寄存器写入读取ID信息命令(NF_CMD_IDREAD);*/
    NF_WRITE_CMD(g_pstNandcReg->NANDC_CMD, NF_CMD_IDREAD);
    /*调用NF_GetMutex获取FLASH事件(FLASH_EVENT);*/
    NF_GetMutex(g_hFlashEvent);
    if(0 == (g_dwIntStatus & NF_READ_DONE)) /*判断中断标志位*/
    {
        /*调用NF_ReleaseMutex释放FLASH访问信号量(FLASH_CHIP_MUTEX);*/
        OALMSG(ZONE_FMD_ERR ,(TEXT("[NANDFMD:NF_ReadID]NF_ReadID Error!g_dwIntStatus = 0x%x\n"), g_dwIntStatus));
        return NF_READ_INT_MISS;
    }
    /*从数据映射区读取ID号输出;*/
    memcpy(pIDBuf, (PVOID)(g_pcDataBuf+1), (NF_ID_LENGTH-1));
    /*调用NF_ReadStatus读取状态;*/
    ret = NF_ReadStatus(&cStatus);
    if(FMD_SUCCESS != ret)
    {
        /*调用NF_ReleaseMutex释放FLASH访问信号量(FLASH_CHIP_MUTEX);*/
        return ret;
    }
    /*调用NF_ReleaseMutex释放FLASH访问信号量(FLASH_CHIP_MUTEX);*/
    return FMD_SUCCESS;
}


/*******************************************************************************
  Function:     NF_PageRead