u-boot-2009.11移植（适用于TQ2440和MINI2440）第四篇：完善目标板外设驱动（Nor flash）

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注意：红色标记为修改的地方

4.3修改NorFlash写入功能的代码

（1）针对EN29LV160AB芯片

具体参考：

gongping11的《u-boot-2010.06移植到TQ2440过程2-nor Flash的移植》文章，网址：http://home.eeworld.com.cn/my/space-uid-67414-blogid-55044.html

IT_114的csdn博客《u-boot-2011.03在TQ2440上的移植(3)--支持norflash启动》网址：http://blog.csdn.net/it_114/article/details/6264897

为flash添加ID号，这个ID 号是一个固定的值，由于是采用了bottom boot block ，从低地址到高地址增长的形式。可知ID 号是2249。添加ID号的函数为：

打开include/flash.h文件194行增加下面两个宏定义

/*添加两种不同扇区方式的ID标号，标号在手册中可以找到*/
#define EON_ID_LV160AB_T 0x22C422C4 /*LV160AB ID (16 M, top boot sector) */
#define EON_ID_LV160AB_B 0x22492249 /*LV160AB ID (16 M, bottom boot sect) */

top boot sect 是第一个分区在最高位,bottom boot sect 是第一个分区在最低位

修改board/sunzl/sunzl2440/flash.c这个文件

//#defineMAIN_SECT_SIZE 0x10000 /* 64 KB */

#defineMAIN_SECT_SIZE 0x8000 /* 32 K Word */

………………

ulong flash_init(void)

{

………………….

#elifdefined(CONFIG_AMD_LV800)

(AMD_MANUFACT &FLASH_VENDMASK) |

(AMD_ID_LV800B &FLASH_TYPEMASK);

#elifdefined(CONFIG_EON_29LV160AB)

(EON_MANUFACT &FLASH_VENDMASK) |/*添加厂商*/

(EON_ID_LV160AB_B& FLASH_TYPEMASK);/*添加芯片的ID号*/

#else

#error "Unknownflash configured"

………………….

if (j <= 3) {

/* 1st one is 8 KB,第一分区的大小是8K字*/

if (j == 0){

flash_info[i].start[j]=

flashbase+ 0;

}

/* 2nd and 3rd are both 4 KB */

if ((j ==1) || (j == 2)) {

flash_info[i].start[j]=

flashbase+ 0x2000 + (j -

1) *

0x1000;

}

/* 4th 16 KB */

if (j == 3){

flash_info[i].start[j]=

flashbase + 0x4000;

}

……………….

void flash_print_info(flash_info_t * info)

{

int i;

switch (info->flash_id &FLASH_VENDMASK) {

case (AMD_MANUFACT &FLASH_VENDMASK):

printf ("AMD: ");

break;

case(EON_MANUFACT & FLASH_VENDMASK):

printf("EON: ") ;

break;

default:

printf ("Unknown Vendor");

break;

}

switch (info->flash_id &FLASH_TYPEMASK) {

case (AMD_ID_LV400B &FLASH_TYPEMASK):

printf ("1x Amd29LV400BB(4Mbit)\n");

break;

case (AMD_ID_LV800B &FLASH_TYPEMASK):

printf ("1x Amd29LV800BB(8Mbit)\n");

break;

case(EON_ID_LV160AB_B & FLASH_TYPEMASK):

printf ("1xEON_29LV160AB (16Mbit)\n");

break;

default:

printf ("Unknown ChipType\n");

……………..

int flash_erase(flash_info_t * info, int s_first, int s_last)

{

……………………..

if ((s_first < 0)|| (s_first > s_last)) {

return ERR_INVAL;

}

if ((info->flash_id &FLASH_VENDMASK) !=

/*(AMD_MANUFACT & FLASH_VENDMASK)) {*/

(EON_MANUFACT & FLASH_VENDMASK)) {

returnERR_UNKNOWN_FLASH_VENDOR;

}

prot = 0;

（2）针对SST39VF1601芯片（芯片型号不同，移植有区别，请对应好自己板子上的芯片做相应的移植）

在虽然S3C2440 和S3C2410 对于Nor Flash 的链接都是一样的，但是SBC2410 使用的AMD 的Nor Flash 芯片，而mini2440 使用的SST 的Nor Flash。这两款芯片在写入时所使用的块大小、时序和指令代码有差别，所以必须根据芯片的数据手册进行修改。主要的差别请看数据手册的对比：

SST39VF1601：

Am29LV160：

除了上面的不同以外，SST39VF1601 每个SECTOR 的大小都是一样的，而

Am29LV160 的头几块比较小。需要做的修改集中在board/sunzl/sunzl2440/flash.c这个文件上，修改如下：

#define CMD_READ_ARRAY 0x000000F0

#define CMD_UNLOCK1 0x000000AA

#define CMD_UNLOCK2 0x00000055

#define CMD_ERASE_SETUP 0x00000080

//#define CMD_ERASE_CONFIRM 0x00000030

#define CMD_ERASE_CONFIRM 0x00000050

#define CMD_PROGRAM 0x000000A0

#define CMD_UNLOCK_BYPASS 0x00000020

#ifdef CONFIG_SST_VF1601

#define MEM_FLASH_ADDR1 (*(volatile u16 *)(CONFIG_SYS_FLASH_BASE +(0x000005555 << 1)))

#define MEM_FLASH_ADDR2 (*(volatile u16 *)(CONFIG_SYS_FLASH_BASE +(0x000002AAA << 1)))

#else

#define MEM_FLASH_ADDR1 (*(volatile u16 *)(CONFIG_SYS_FLASH_BASE + (0x00000555 <<1)))

#define MEM_FLASH_ADDR2 (*(volatile u16 *)(CONFIG_SYS_FLASH_BASE + (0x000002AA <<1)))

#endif

…………..

ulong flash_init (void)

{

…………..

#elif defined(CONFIG_AMD_LV800)

(AMD_MANUFACT& FLASH_VENDMASK) |

(AMD_ID_LV800B& FLASH_TYPEMASK);

#elif defined(CONFIG_SST_VF1601)

(SST_MANUFACT& FLASH_VENDMASK) |

(SST_ID_xF1601& FLASH_TYPEMASK);

#else

#error "Unknown flash configured"

…………

panic ("configured too many flashbanks!\n");

for (j =0; j < flash_info[i].sector_count; j++) {

#ifndef CONFIG_SST_VF1601

if (j<= 3) {

/*1st one is 16 KB */

if(j == 0) {

flash_info[i].start[j]=

flashbase+ 0;

}

/*2nd and 3rd are both 8 KB */

if((j == 1) || (j == 2)) {

flash_info[i].start[j]=

flashbase+ 0x4000 + (j -1) *0x2000;

}

/*4th 32 KB */

if(j == 3) {

flash_info[i].start[j]=

flashbase+ 0x8000;

}

}else {

flash_info[i].start[j]=

flashbase+ (j - 3) * MAIN_SECT_SIZE;

}

#else

flash_info[i].start[j]=

flashbase+ (j) * MAIN_SECT_SIZE;

#endif

}

size +=flash_info[i].size;

}

…………

void flash_print_info (flash_info_t * info)

{

……………

case (AMD_MANUFACT & FLASH_VENDMASK):

printf("AMD: ");

break;

case (SST_MANUFACT & FLASH_VENDMASK):

printf("SST: ");

break;

default:

printf("Unknown Vendor ");

break;

}

…………

case (AMD_ID_LV800B & FLASH_TYPEMASK):

printf("1x Amd29LV800BB (8Mbit)\n");

break;

case (SST_ID_xF1601 & FLASH_TYPEMASK):

printf("1x SST39VF1601 (2MB)\n");

break;

default:

printf("Unknown Chip Type\n");

gotoDone;

……………

int flash_erase (flash_info_t * info, int s_first, ints_last)

{

// ushortresult;

int iflag,cflag, prot, sect;

int rc =ERR_OK;

// intchip;

……………

if ((s_first < 0) || (s_first > s_last)) {

returnERR_INVAL;

}

#ifdef CONFIG_SST_VF1601

if((info->flash_id & FLASH_VENDMASK) !=

(SST_MANUFACT & FLASH_VENDMASK)) {

returnERR_UNKNOWN_FLASH_VENDOR;

}

#else

if((info->flash_id & FLASH_VENDMASK) !=

(AMD_MANUFACT & FLASH_VENDMASK)) {

returnERR_UNKNOWN_FLASH_VENDOR;

}

#endif

prot = 0;

……………….

MEM_FLASH_ADDR1= CMD_UNLOCK1;

MEM_FLASH_ADDR2= CMD_UNLOCK2;

*addr= CMD_ERASE_CONFIRM;

#if 0

/*wait until flash is ready */

chip= 0;

……………

printf("protected!\n");

}

#endif

/* waituntil flash is ready */

while(1){

unsigned short i;

i = *((volatileunsigned short *)addr) & 0x40;

if(i != (*((volatile unsigned short*)addr) & 0x40))

continue;

if((*((volatileunsigned short *)addr)) & 0x80)

break;

}

printf ("ok.\n");

} else { /* it was protected */

printf("protected!\n");

}

if (ctrlc ())

printf("User Interrupt!\n");

// outahere:

……………….

static int write_hword (flash_info_t * info, ulongdest, ushort data)

{

……………

int cflag,iflag;

// intchip;

………..

MEM_FLASH_ADDR1 = CMD_UNLOCK1;

MEM_FLASH_ADDR2= CMD_UNLOCK2;

// MEM_FLASH_ADDR1= CMD_UNLOCK_BYPASS;

// *addr= CMD_PROGRAM;

MEM_FLASH_ADDR1= CMD_PROGRAM;

*addr = data;

/* armsimple, non interrupt dependent timer */

reset_timer_masked();

#if 0

/* wait untilflash is ready */

chip = 0;

………….

if (chip == ERR || *addr != data)

rc =ERR_PROG_ERROR;

#endif

/* wait until flash is ready */

while(1){

unsigned short i = *(volatile unsigned short *)addr & 0x40;

if(i != (*(volatile unsigned short *)addr & 0x40)) //D6 == D6

continue;

if((*(volatile unsigned short *)addr & 0x80) == (data & 0x80)){

rc = ERR_OK;

break; //D7 == D7

}

if (iflag)

enable_interrupts();

if (cflag)

icache_enable();

return rc;

}

（3）针对S29AL016芯片

具体参考yuesichiu的csdn博客《S3C2440U-Boot移植--Norflash驱动支持- S29AL016》，网址http://blog.csdn.net/yuesichiu/article/details/8267015

AM29LV160B与S29AL016J的厂商id和芯片id相同，那我们就可以直接根据AM29LV160B来移植。

修改board/sunzl/sunzl2440/flash.c这个文件

一：flash_init(void) 函数中

#if defined(CONFIG_AMD_LV400)
                    (AMD_MANUFACT &FLASH_VENDMASK) |
                    (AMD_ID_LV400B &FLASH_TYPEMASK);
#elif defined(CONFIG_AMD_LV1800)
                    (AMD_MANUFACT &FLASH_VENDMASK) |
                    (AMD_ID_LV800B &FLASH_TYPEMASK);

之后加入
#elif defined(CONFIG_AMD_LV160)
(AMD_MANUFACT &FLASH_VENDMASK) |
(AMD_ID_LV160B &FLASH_TYPEMASK);

二：flash_print_info(flash_info_t *info)函数中

case (AMD_ID_LV400B&FLASH_TYPEMASK):
             printf ("1xAmd29LV400BB (4Mbit)\n");
             break;
case (AMD_ID_LV800B & FLASH_TYPEMASK):
             printf ("1xAmd29LV800BB (8Mbit)\n");
             break;

之后加入
       case(AMD_ID_LV160B &FLASH_TYPEMASK):
             printf ("1x S29AL016J(16Mbit ) \n");
             break;

三种芯片剩下的修改都在最后include/configs/sunzl2440.h配置文件中修改具体参考

u-boot-2009.11移植（适用于TQ2440和MINI2440）第五篇：修改配置文件

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