boot/common/src/loader/drivers/spifc.c

/*********************************************************************
 Copyright 2016 by  ZXIC Corporation.
*
* FileName::    spifc.c
* File Mark:
* Description:  
* Others:
* Version:  
* Author:  
* Date:   

* History 1:
*     Date: 
*     Version:
*     Author: 
*     Modification:
* History 2:
**********************************************************************/
#include <common.h>
#include <asm/arch/spifc.h>
#include <asm/io.h>
#include <bbt.h>

#include "flash.h"


static const struct spi_flash_device_para *spi_flash_info = NULL;
/* spi flash parameter config */
static const struct spi_flash_device_para spi_flash_para[] = {
	/* GIGADEVICE GD5F1GQ4R 128MB 1.8V SPI-NAND */
	{0xC8, 0xC1, 0x77, 2048, 11, 128, 17, 1024, 0x20000, 1},
	/* GIGADEVICE GD5F1GQ5RExxG  128MB 1.8V SPI-NAND */
	{0xC8, 0x41, 0x77, 2048, 11, 64, 17, 1024, 0x20000, 1},
	/* GIGADEVICE GD5F2GQ4R 256MB SPI-NAND */	
	{0xC8, 0xC2, 0x77, 2048, 11, 128, 17, 2048, 0x20000, 1}, 
	/* GIGADEVICE GD5F4GQ4U 512MB SPI-NAND */
	{0xC8, 0xC4, 0x77, 4096, 12, 256, 18, 2048, 0x40000, 1},
    /* GIGADEVICE GD5F4GQ6REY2G    512MB SPI-NAND*/
	{0xC8, 0x45, 0x77, 2048, 11, 128, 17, 4096, 0x20000, 1},
	
	/* PARAGON PN26Q01AWSIUG 128MB SPI-NAND */	
	{0xA1, 0xC1, 0x77, 2048, 11, 128, 17, 1024, 0x20000, 1},
	/* PN26Q02AWSIUG 1.8V 2G-BIT SPI NAND  */	
	{0xA1, 0xC2, 0x77, 2048, 11, 128, 17, 2048, 0x20000, 1},

	/* HYF1GQ4IAACAE SPI-NAND  */	
	{0xC9, 0x51, 0x77, 2048, 11, 128, 17, 1024, 0x20000, 1},
	/* HYF2GQ4IAACAE SPI-NAND  */	
	{0xC9, 0x52, 0x77, 2048, 11, 128, 17, 2048, 0x20000, 1},
	/*winbond W25N01G*/
	{0xEF, 0xBA, 0x77, 2048, 11, 64, 17, 1024, 0x20000, 1},
	/*winbond W25N02G*/
	{0xEF, 0xBB, 0x77, 2048, 11, 64, 17, 2048, 0x20000, 1},		
	/* TOSHIBA TC58CYG0S3HRAIG 128MB SPI-NAND*/
	{0x98, 0xB2, 0x77, 2048, 11, 64, 17, 1024, 0x20000, 1},
	/* TOSHIBA TC58CYG1S3HRAIG 256MB SPI-NAND*/
	{0x98, 0xBB, 0x77, 2048, 11, 64, 17, 2048, 0x20000, 1},
	/* ZETTA ZD35X1GAXXX 128MB SPI-NAND*/
	{0xBA, 0x21, 0x77, 2048, 11, 64, 17, 1024, 0x20000, 1},
	/* DOSILICON DS35X1GAXXX 128MB SPI-NAND*/
	{0xE5, 0x21, 0x77, 2048, 11, 64, 17, 1024, 0x20000, 1},
	/* DOSILICON DS35X12BXXX 64MB SPI-NAND*/
	{0xE5, 0xA5, 0x77, 2048, 11, 128, 17, 512, 0x20000, 1},
	/* FUDANWEI FM25LS01 128MB SPI-NAND*/
	{0xA1, 0xA5, 0x77, 2048, 11, 128, 17, 1024, 0x20000, 1},
	/* hosin  HG-SPIXGb-1XAIA 128MB SPI-NAND*/
	{0xD6, 0x21, 0x77, 2048, 11, 64, 17, 1024, 0x20000, 1},
	/* EMST F50D1G41LB (2M) 128MB SPI-NAND */
	{0xC8, 0x11, 0x77, 2048, 11, 64, 17, 1024, 0x20000, 1},
	/* FORESEE F35UQA001G 128MB SPI-NAND */
	{0xCD, 0x61, 0x77, 2048, 11, 64, 17, 1024, 0x20000, 1},
	/* FORESEE F35UQA512M 64MB SPI-NAND */
	{0xCD, 0x60, 0x77, 2048, 11, 64, 17, 512, 0x20000, 1},
	/* micron-MT29F2G01ABAGDWB-ITG 256MB SPI-NAND */
	{0x2C, 0x25, 0x77, 2048, 11, 128, 17, 2048, 0x20000, 2},
	/* ESMT F50D44G41XB (2X)  512MB SPI-NAND*/
	{0x2C, 0x35, 0x77, 4096, 12, 256, 18, 2048, 0x40000, 1},
	/*XTX XT26Q04D 512M SPI-NAND*/
	{0x0B, 0x53, 0x77, 4096, 12, 256, 18, 2048, 0x40000, 1},
	/*UNIM UM19A0LISW 128M SPI-NAND*/
	{0xB0, 0x15, 0x77, 2048, 11, 64, 17, 1024, 0x20000, 1},
	/* GD5F4GM8RExxG  512MB SPI-NAND */
	{0xC8, 0x85, 0x77, 2048, 11, 64, 17, 4096, 0x20000, 1},
	{0}
};


/*
 ******************************************************************************
 * Function:    spifc_enable
 * Description: 
 * Parameters:
 *	 Input:
 *	 Output:
 * Returns:
 * Others:
 *******************************************************************************
 */
static void spifc_enable(void)
{
    volatile struct spi_t* spi	= (struct spi_t*)SYS_SPI_NAND_BASE;
    
    if( spi->SFC_EN & FC_EN_BACK )
        return;
    
    spi->SFC_EN |= FC_EN;  
    spi->SFC_CTRL0 |= FC_SCLK_PAUSE_EN;
}

/*
 ******************************************************************************
 * Function:    spifc_clear_fifo
 * Description: 
 * Parameters:
 *	 Input:
 *	 Output:
 * Returns:
 * Others:
 *******************************************************************************
 */
void spifc_clear_fifo( void )
{
    volatile struct spi_t* spi	= (struct spi_t*)SYS_SPI_NAND_BASE;
    
    spi->SFC_CTRL0 |= (FC_RXFIFO_THRES | FC_TXFIFO_THRES | 
                       FC_RXFIFO_CLR | FC_TXFIFO_CLR);
}


/*
 ******************************************************************************
 * Function:    spifc_setup_cmd
 * Description: 
 * Parameters:
 *	 Input:
 *	 Output:
 * Returns:
 * Others:
 *******************************************************************************
 */
static void spifc_setup_cmd( struct spiflash_cmd_t *cmd, 
                                  uint32_t addr, uint32_t len )
{   
    volatile struct spi_t* spi	= (struct spi_t*)SYS_SPI_NAND_BASE;
    uint32_t wrap = 0;	
    uint32_t tmp = 0;
	
    /* ÃüÁîÂë */  
    spi->SFC_INS = cmd->cmd;

	/* Êý¾Ý³¤¶È */
    if( len )
        spi->SFC_BYTE_NUM = len - 1;
    else
        spi->SFC_BYTE_NUM = 0;  

    switch( len )
    {
        case 2048:
            wrap = WRAP_SIZE_MAIN;
            break;
        case 2112:
             wrap = WRAP_SIZE_MAIN_OOB;;
            break;
        case 64:
             wrap = WRAP_SIZE_OOB;;
            break;
        default:
            wrap = 0;
            break;
    }

    /* µØÖ·Âë */
    switch( spi->SFC_INS )
    {
        case CMD_READ_FROM_CACHE:
        //  case CMD_READ_FROM_CACHE_X2:
        case CMD_READ_FROM_CACHE_X4:
        case CMD_READ_FROM_CACHE_QIO:
        case CMD_PROGRAM_LOAD:
        case CMD_PROGRAM_LOAD_X4:
            // case CMD_PROGRAM_LOAD_RANDOM:
            //  case CMD_PROGRAM_LOAD_RANDOM_X4:
            //case CMD_PROGRAM_LOAD_RANDOM_QIO:
            addr |= wrap;
            break;
            
        default:
            addr = addr;
            break;
    }
    spi->SFC_ADDR = addr;  

    /* µØÖ·Âë¡¢¿ÕÖÜÆÚ¡¢¶Á/д ʹÄÜÉèÖà */
    spi->SFC_CTRL1 = 0;
    spi->SFC_CTRL1 = ((cmd->addr_tx_en << FC_ADDR_TX_EN) |  
                      (cmd->dumy_tx_en << FC_DUMMY_TX_EN) | 
                      (cmd->data_rx_en << FC_READ_DAT_EN) | 
                      (cmd->data_tx_en << FC_WRITE_DAT_EN)); 
                    

	/* ¿ÕÖÜÆÚÊý¡¢µØÖ·¿í¶È(1£¬2£¬3£¬4×Ö½Ú)¡¢
	 * µØÖ·/Êý¾ÝÏ߶ȡ¢´«Êäģʽ 
	 */
#if 0
    tmp = spi->SFC_CTRL2;
    tmp &= 0x1f;
    tmp |= ((cmd->dumy_bytes << FC_DUMMY_BYTE_NUM) |
            (cmd->dumy_bits << FC_DUMMY_BIT_NUM) |
            (cmd->addr_width << FC_ADDR_BYTE_NUM));
    spi->SFC_CTRL2 = tmp;
#else
	spi->SFC_CTRL2 = 0;
	tmp |= ((cmd->dumy_bytes << FC_DUMMY_BYTE_NUM) |
			(cmd->dumy_bits << FC_DUMMY_BIT_NUM) |
			(cmd->addr_width << FC_ADDR_BYTE_NUM));
	tmp &= ~0x700;
	spi->SFC_CTRL2 = tmp;
#endif
       
}


/*
 ******************************************************************************
 * Function:    spifc_clear_int
 * Description: 
 * Parameters:
 *	 Input:
 *	 Output:
 * Returns:
 * Others:
 *******************************************************************************
 */
 void spifc_clear_int( void )
{
    volatile struct spi_t* spi	= (struct spi_t*)SYS_SPI_NAND_BASE;
    
    if(spi->SFC_INT_RAW & 0x2)
        printf("\n");

    spi->SFC_INT_SW_CLR = 0xFF; //clear int ?
}


/*
 ******************************************************************************
 * Function:    spifc_wait_cmd_end
 * Description: 
 * Parameters:
 *	 Input:
 *	 Output:
 * Returns:
 * Others:
 *******************************************************************************
 */
static int spifc_wait_cmd_end( void )
{
    volatile struct spi_t* spi	= (struct spi_t*)SYS_SPI_NAND_BASE;
    uint32_t int_status = 0;
    
    while(!(spi->SFC_INT_RAW & FC_INT_RAW_MASK));
    
    int_status = spi->SFC_INT_RAW;
    spi->SFC_INT_SW_CLR = int_status;	/* clear intrrupt */

	if(int_status & FC_INT_RAW_CMD_END)
    {   
        return 0;
    }
    else
    {
		printf("intr err.\n");
        return -1;
    } 

}


/*
 ******************************************************************************
 * Function:    spifc_read_fifo_one_byte
 * Description: 
 * Parameters:
 *	 Input:
 *	 Output:
 * Returns:
 *
 * Others:  only for:
                [Instruction]                 |--addr width is 8 bit
                [addr]                        |--get feature
                [data_rx]   
 *******************************************************************************
 */
static int spifc_read_fifo_one_byte( uint8_t *value )
{
    uint32_t sw = 0;
    volatile struct spi_t* spi	= (struct spi_t*)SYS_SPI_NAND_BASE;

    sw = spi->SFC_SW;
    
    if( ((sw >> FC_RX_FIFO_CNT) & FC_RX_FIFO_CNT_MASK) != 1 )
    {
        return -1;
    }

    *value = (uint8_t)spi->SFC_DATA;   
    
    return 0;
}


/*
 ******************************************************************************
 * Function:    spifc_read_fifo
 * Description:
 * Parameters:
 *	 Input:
 *	 Output:
 * Returns:
 * Others:
 *******************************************************************************
 */
static uint32_t spifc_read_fifo( uint32_t len, uint8_t *buf )
{
    volatile struct spi_t* spi	= (struct spi_t*)SYS_SPI_NAND_BASE;
    uint32_t *p = (uint32_t *)buf;
    uint32_t cnt = 0;

    while(cnt < ((len+3)>>2))  
    {
        if(spi->SFC_SW & (FC_RX_FIFO_CNT_MASK<<FC_RX_FIFO_CNT))//rx fifo not empty
        {           
            p[cnt++]= spi->SFC_DATA;
        }
    }

    return (cnt<<2);
}


/*
 ******************************************************************************
 * Function:    spifc_start
 * Description: 
 * Parameters:
 *	 Input:
 *	 Output:
 * Returns:
 * Others:
 *******************************************************************************
 */
static void spifc_start( void )
{
    volatile struct spi_t* spi	= (struct spi_t*)SYS_SPI_NAND_BASE;
    
    spi->SFC_START |= FC_START;
}

/*
 ******************************************************************************
 * Function:    spifc_get_feature
 * Description: 
 * Parameters:
 *	 Input:
 *	 Output:
 * Returns:
 *
 * Others:   [Instruction]                 |--addr width is 8 bit
             [addr]                        |--get feature
             [data_rx]                     |--read id
            
 *******************************************************************************
 */
 static int spifc_get_feature( uint32_t reg_addr, uint8_t *value)
 {   
    int ret = 0;
    
    struct spiflash_cmd_t cmd = {CMD_GET_FEATURE,		
                                 1,                     
                                 FC_ADDR_BYTE_NUM_8,    
                                 0,                     
                                 1,                     
                                 0,                     
                                 0,                     
                                 0                      
                                };

    spifc_clear_fifo();
    spifc_clear_int();
     
    spifc_setup_cmd(&cmd, reg_addr, 1);
    spifc_start();             
    ret = spifc_wait_cmd_end();
    if(ret != 0)
    {
        return ret;
    }

    ret = spifc_read_fifo_one_byte(value);
    if(ret != 0) 
    {
        return ret;
    }
     
    return 0;
}

/*
 ******************************************************************************
 * Function:    spifc_read_id
 * Description: 
 * Parameters:
 *	 Input:
 *	 Output:
 * Returns:
 *
 * Others:  [Instruction]                 |--addr width is 8 bit
            [addr]                        |--get feature
            [data_rx]                     |--read id
 *******************************************************************************
 */
static int spifc_read_id(uint32_t reg_addr, uint8_t *value, uint8_t len)
{   
    int ret = 0;
    
    struct spiflash_cmd_t cmd = {   CMD_READ_ID,            
	                                1,                      
	                                FC_ADDR_BYTE_NUM_8,     
	                                0,                     
	                                1,                     
	                                0,                     
	                                0,                     
	                                0                      
                                };

    spifc_clear_fifo();
    spifc_clear_int();
    spifc_setup_cmd(&cmd, reg_addr, len);       
    spifc_start();                             
	ret = spifc_wait_cmd_end();            
    if(ret != 0)
    {
        return ret;
    }

    ret = spifc_read_fifo(len, value);    
    if(ret != 0) 
    {
        return ret;
    }   

    return 0;
}


/*
 ******************************************************************************
 * Function:    spifc_read_page_to_cache
 * Description: 
 * Parameters:
 *	 Input:
 *	 Output:
 * Returns:
 * Others:  [Instruction]       |--addr width is 24 bit(page/block addr!!!!)
            [addr]              |--page read
                                |--block erase
                                |--program execute
 *******************************************************************************
 */
static int spifc_read_page_to_cache(uint32_t page_addr)
{     
    int ret = 0;
    uint8_t status = 0;
    
    struct spiflash_cmd_t cmd = {   CMD_READ_PAGE_TO_CACHE, 
                                    1,                      
                                    FC_ADDR_BYTE_NUM_24,    
                                    0,                      
                                    0,                      
                                    0,                      
                                    0,                      
                                    0                       
                                };
	
    spifc_clear_fifo();
    spifc_clear_int();
    spifc_setup_cmd(&cmd, page_addr, 0);   
    spifc_start();                         
    ret = spifc_wait_cmd_end();            
    if(ret != 0)
    {
        return ret;
    }
	
    do
    {
        spifc_get_feature(REG_STATUS, &status);
    }while( status & OIP);
     
    return 0;
}

/*
 ******************************************************************************
 * Function:    spifc_read_from_cache
 * Description: 
 * Parameters:
 *	 Input:
 *	 Output:
 * Returns:
 * Others:  [Instruction]                 |--addr width is 16 bit
            [addr]                        |--dummy cycel 8/4/2
            [dummy]                       |--read form cache(X1,X2,X4)
            [data_rx]                     |--read form cache(dual,quad)IO
 *******************************************************************************
 */
static int spifc_read_from_cache(uint32_t column_addr, uint32_t len, uint8_t *buf)
{      
    int ret = 0;

    uint32_t len_tmp = 0;
    struct spiflash_cmd_t cmd;
    
    cmd.cmd = CMD_READ_FROM_CACHE;          
    cmd.dumy_bytes = 1;                     
    cmd.dumy_bits = 0;                      
    cmd.addr_tx_en = 1;                     
    cmd.addr_width = FC_ADDR_BYTE_NUM_16;   
    cmd.data_tx_en = 0;                     
    cmd.data_rx_en = 1;                     
    cmd.dumy_tx_en = 1;                     
 
    spifc_clear_fifo();
    spifc_clear_int();
    spifc_setup_cmd(&cmd, column_addr, len);
    spifc_start();                          
    
    len_tmp = spifc_read_fifo(len, buf);           
    if( len_tmp != len ) 
    {
        ret = -2;
        return ret;
    }

    ret = spifc_wait_cmd_end();
    if( ret != 0 )
    {
        return ret;
    }
     
    return 0;
}


/*
 ******************************************************************************
 * Function:     nand_read_oob
 * Description: 
 * Parameters:
 *	 Input:
 *	 Output:
 * Returns:
 * Others:
 *******************************************************************************
 */
void spifc_read_oob(uint8_t *buf, uint32_t offset, uint32_t len)
{  
	uint32_t column_offset = spi_flash_info->page_size;
	uint32_t page = offset >> (spi_flash_info->page_size_shift);
	uint32_t blocks = offset >> (spi_flash_info->block_size_shift);
	
	spifc_read_page_to_cache(page);

	if((spi_flash_info->planes == 2) && ((blocks%2) != 0))
	{
		column_offset |= (0x1 << 12);
	}
	spifc_read_from_cache(column_offset, spi_flash_info->oob_size, buf);
}


/*
 ******************************************************************************
 * Function:     read_page
 * Description: 
 * Parameters:
 *	 Input:
 *	 Output:
 * Returns:
 * Others:
 *******************************************************************************
 */
int32_t spifc_read_page(uint32_t buf, uint32_t offset)
{
	int ret = 0;
	uint8_t feature = 0x0;

	uint32_t page = offset >> (spi_flash_info->page_size_shift);
	uint32_t blocks = offset >> (spi_flash_info->block_size_shift);
	uint32_t column_offset = 0;

	if( (buf & 0x3) != 0 )		/* DMAµØÖ·ÒªÇó4×Ö½Ú¶ÔÆë */
	{
		printf("addr err.\n"); 
		return -1;      
	}

	ret = spifc_read_page_to_cache(page);
	if( ret != 0 )
		return ret;

	ret = spifc_get_feature(REG_STATUS, &feature);
	if(ret != 0)
		return ret;

	if((feature>>ECC_ERR_BIT & 0x3) == 0x2)
	{
		printf("ecc err.\n");
		return -1;
	}
	if((spi_flash_info->planes == 2) && ((blocks%2) != 0))
	{
		column_offset |= (0x1 << 12);
	}
	ret = spifc_read_from_cache(column_offset, spi_flash_info->page_size, (uint8_t *)buf);
	if(ret != 0)
		return ret;

	return 0;
}

/*
 ******************************************************************************
 * Function:     read_page
 * Description: 
 * Parameters:
 *	 Input:
 *	 Output:
 * Returns:
 * Others:
 *******************************************************************************
 */
int32_t spifc_read_page_raw(uint32_t buf, uint32_t offset)
{
    int ret = 0;
    uint8_t feature = 0x0;

    uint32_t page = offset >> (spi_flash_info->page_size_shift);

    if( (buf & 0x3) != 0 )		/* DMAµØÖ·ÒªÇó4×Ö½Ú¶ÔÆë */
    {
        printf("addr err.\n"); 
        return -1;      
    }
    
    ret = spifc_read_page_to_cache(page);
    if( ret != 0 )
        return ret;

    ret = spifc_read_from_cache(0, spi_flash_info->page_size, (uint8_t *)buf);
	if(ret != 0)
        return ret;

    return 0;
}


/*
 ******************************************************************************
 * Function:     nand_read
 * Description: 
 * Parameters:
 *	 Input:
 *	 Output:
 * Returns:
 * Others: from: must page align len:  must page align
 *******************************************************************************
 */
int32_t spifc_read(uint32_t from, uint32_t len, uint32_t to)
{
    uint32_t offset = from;
    uint32_t left_to_read = len;
    uint32_t p_to = to;
    int32_t ret = 0;
    int32_t page_size = (spi_flash_info->page_size);

    if((offset & (page_size - 1)) || (len & (page_size - 1)) )
    {
        return -1;       
    }

    while( left_to_read > 0 )
    {       
        ret = spifc_read_page(p_to, offset);
		if(ret != 0)
		{
			return -1;
		}
        
        left_to_read -= page_size;
        offset += page_size;
        p_to += page_size;          
    }
    return 0;
}


/*******************************************************************************
 * Function:     nand_read_id
 * Description: 
 * Parameters:
 *	 Input:
 *
 *	 Output:
 *
 * Returns:
 *
 *
 * Others:
 ********************************************************************************/
 int32_t read_id (void)
{
    uint8_t id[4];
    const struct spi_flash_device_para *spi_flash = &spi_flash_para[0];

    spifc_read_id(0x0, id, 2);
	
    while( spi_flash->manuf_id != 0 )
    {   
        if( ((uint8_t)id[0] == spi_flash->manuf_id) && 
                ((uint8_t)id[1] == spi_flash->device_id) )
        {
            spi_flash_info = spi_flash;
            return 0;
        };
        spi_flash++;
    }
    
    return -1;   
}

/*******************************************************************************
 * Function:     
 * Description: 
 * Parameters:
 *	 Input:
 *
 *	 Output:
 *
 * Returns:
 *
 *
 * Others:
 ********************************************************************************/
int32_t read_data(uint32_t from, uint32_t len, uint32_t to)
{
    uint32_t offset = from;
    uint32_t left_to_read = len;
    uint32_t p_to = to;
    int32_t ret = 0;
    int32_t block_size = (spi_flash_info->block_size);
            
    while(left_to_read > 0)
    {
        uint32_t block_offset = offset & (block_size - 1);
		uint32_t read_length;

        if( nand_block_isbad(offset) )
        {
            offset += block_size;
            continue;
        }
            
        if (left_to_read < (block_size - block_offset))
			read_length = left_to_read;
		else
			read_length = block_size - block_offset;
      
        ret = spifc_read(offset, read_length, p_to);
		if(ret != 0)
		{
			return -1;
		}

        left_to_read -= read_length;
        offset += read_length;
        p_to += read_length;         
    }
    
    return 0;
}

/*******************************************************************************
 * Function:     nand_init
 * Description: 
 * Parameters:
 *	 Input:
 *
 *	 Output:
 *
 * Returns:
 *
 *
 * Others:
 ********************************************************************************/
int32_t spifc_init (void)
{
    int32_t ret = 0;
    spifc_enable();
    ret = read_id();
    if(ret != 0)
    {
		printf("id err!\n");
		return -1;
    }
        
	flash.flash_type = SPI_NAND_BOOT;
	flash.manuf_id = spi_flash_info->manuf_id;
	flash.device_id = spi_flash_info->device_id;
	flash.page_size = spi_flash_info->page_size;
	flash.page_size_shift = spi_flash_info->page_size_shift;
	flash.oob_size = spi_flash_info->oob_size;
	flash.block_size = spi_flash_info->block_size;
	flash.block_size_shift = spi_flash_info->block_size_shift;
	flash.block_num = spi_flash_info->block_num;
	flash.read_page_raw = spifc_read_page_raw;
	flash.read_oob = spifc_read_oob;
	flash.read = read_data;
	
    return 0;
	
}

/*
 ******************************************************************************
 * Function:     
 * Description: 
 * Parameters:
 *	 Input:
 *	 Output:
 * Returns:
 * Others:
 *******************************************************************************
 */
int board_flash_init(void)
{
	int ret = 0;
	char boot_mode = 0;

	printf("spi-nand:");
	
	boot_mode = get_boot_mode();
#if defined(CONFIG_ZX297520V3E_VEHICLE_DC) || defined(CONFIG_ZX297520V3E_VEHICLE_DC_REF)
    if(boot_mode == NOR_BOOT)
	{
		writel(CFG_START_MODE_SPI_NAND, CFG_BOOT_MODE_START_MODE_FOR_UBOOT);
		return 0; 
	}
#else
	if(boot_mode != SPI_NAND_BOOT)
	{
		printf("mode err.\n");
		return -1; 
	}
#endif
	writel(CFG_START_MODE_SPI_NAND, CFG_BOOT_MODE_START_MODE_FOR_UBOOT); 
	ret = spifc_init();
	if(ret != 0)
	{
		printf("init err.\n");
		return -1;
	}
	printf("init ok.\n");

//	nand_creat_bbt();
nand_creat_ram_bbt();
	
	return 0;
}