Uboot在S3C2440上的移植详解（二）

#gedit include/configs/my2440.h //修正指令行前的姓名和Nor Flash参数部分的界说

#define CONFIG_SYS_PROMPT “[MY2440]#” //将指令行前的姓名改成[MY2440]

/*———————————————————————–
* FLASH and environment organization
*/
#if 0//注释掉下面两个类型的Nor Flash设置，由于不是咱们所运用的类型
#define CONFIG_AMD_LV400 1 /* uncomment this if you have a LV400 flash */
#define CONFIG_AMD_LV800 1 /* uncomment this if you have a LV800 flash */
#endif

#defineCONFIG_SYS_MAX_FLASH_BANKS 1 /* max number of memory banks */

#ifdef CONFIG_AMD_LV800
#definePHYS_FLASH_SIZE 0x00100000 /* 1MB */
#defineCONFIG_SYS_MAX_FLASH_SECT (19) /* max number of sectors on one chip */
#define CONFIG_ENV_ADDR (CONFIG_SYS_FLASH_BASE + 0x0F0000)/* addr of environment */
#endif
#ifdef CONFIG_AMD_LV400
#define PHYS_FLASH_SIZE 0x00080000 /* 512KB */
#define CONFIG_SYS_MAX_FLASH_SECT (11)/* max number of sectors on one chip */
#define CONFIG_ENV_ADDR (CONFIG_SYS_FLASH_BASE + 0x070000)/* addr of environment */
#endif
#defineCONFIG_SST_39VF1601 1//增加mini2440开发板Nor Flash设置
#definePHYS_FLASH_SIZE 0x200000//咱们开发板的Nor Flash是2M
#defineCONFIG_SYS_MAX_FLASH_SECT (512)//依据SST39VF1601的芯片手册描绘，对其进行操作有两种方法：块方法和扇区方法。现选用扇区方法(sector)，1 sector = 2Kword = 4Kbyte，所以2M的Nor Flash共有512个sector
#defineCONFIG_ENV_ADDR (CONFIG_SYS_FLASH_BASE + 0x040000)//暂设置环境变量的首地址为0x040000(即：256Kb)

#gedit board/samsung/my2440/flash.c

//修正界说部分如下：

//#define MAIN_SECT_SIZE 0x10000
#define MAIN_SECT_SIZE 0x1000//界说为4k，刚好是一个扇区的巨细

//#define MEM_FLASH_ADDR1 (*(volatile u16 *)(CONFIG_SYS_FLASH_BASE + (0x00000555 << 1)))
//#define MEM_FLASH_ADDR2 (*(volatile u16 *)(CONFIG_SYS_FLASH_BASE + (0x000002AA << 1)))
#define MEM_FLASH_ADDR1 (*(volatile u16 *)(CONFIG_SYS_FLASH_BASE +(0x00005555 << 1))) //这两个参数看SST39VF1601手册
#define MEM_FLASH_ADDR2 (*(volatileu16 *)(CONFIG_SYS_FLASH_BASE +(0x00002AAA << 1)))

//修正flash_init函数如下：
#elif defined(CONFIG_AMD_LV800)
(AMD_MANUFACT & FLASH_VENDMASK)|
(AMD_ID_LV800B & FLASH_TYPEMASK);
#elifdefined(CONFIG_SST_39VF1601)//在CONFIG_AMD_LV800后边增加CONFIG_SST_39VF1601
(SST_MANUFACT & FLASH_VENDMASK)|
(SST_ID_xF1601 & FLASH_TYPEMASK);

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

flash_info[i].start[j]= flashbase + j * MAIN_SECT_SIZE;
}

//修正flash_print_info函数如下：

case(AMD_MANUFACT & FLASH_VENDMASK):
printf(“AMD: “);
break;
case(SST_MANUFACT & FLASH_VENDMASK)://增加SST39VF1601的
printf(“SST:”);
break;

case(AMD_ID_LV800B & FLASH_TYPEMASK):
printf(“1x Amd29LV800BB (8Mbit)\n”);
break;
case(SST_ID_xF1601 & FLASH_TYPEMASK)://增加SST39VF1601的
printf(“1x SST39VF1610 (16Mbit)\n”);
break;

//修正flash_erase函数如下：
//if ((info->flash_id & FLASH_VENDMASK) !=
// (AMD_MANUFACT & FLASH_VENDMASK)) {
// return ERR_UNKNOWN_FLASH_VENDOR;
//}
if((info->flash_id & FLASH_VENDMASK)!=
(SST_MANUFACT & FLASH_VENDMASK)){
return ERR_UNKNOWN_FLASH_VENDOR;
}

///* wait until flash is ready */
//chip = 0;
//do {
// result = *addr;
// /* check timeout */
// if (get_timer_masked () >
// CONFIG_SYS_FLASH_ERASE_TOUT) {
// MEM_FLASH_ADDR1 = CMD_READ_ARRAY;
// chip = TMO;
// break;
// }

// if (!chip
// && (result & 0xFFFF) & BIT_ERASE_DONE)
// chip = READY;

// if (!chip
// && (result & 0xFFFF) & BIT_PROGRAM_ERROR)
// chip = ERR;
//} while (!chip);

//MEM_FLASH_ADDR1 = CMD_READ_ARRAY;

//if (chip == ERR) {
// rc = ERR_PROG_ERROR;
// goto outahere;
//}

//if (chip == TMO) {
// rc = ERR_TIMOUT;
// goto outahere;
//}
while(1)
{
if((*addr & 0x40)!=(*addr & 0x40))
continue;

if(*addr & 0x80)
{
rc = ERR_OK;
break;
}
}

//修正write_hword函数如下：
MEM_FLASH_ADDR1 = CMD_UNLOCK1;
MEM_FLASH_ADDR2 = CMD_UNLOCK2;
//MEM_FLASH_ADDR1 = CMD_UNLOCK_BYPASS;
MEM_FLASH_ADDR1 = CMD_PROGRAM;
//*addr = CMD_PROGRAM;
*addr = data;

///* wait until flash is ready */
//chip = 0;
//do {
// result = *addr;
// /* check timeout */
// if (get_timer_masked () > CONFIG_SYS_FLASH_ERASE_TOUT) {
// chip = ERR | TMO;
// break;
// }

// if (!chip && ((result & 0x80) == (data & 0x80)))
// chip = READY;

// if (!chip && ((result & 0xFFFF) & BIT_PROGRAM_ERROR)) {
// result = *addr;

// if ((result & 0x80) == (data & 0x80))
// chip = READY;
// else
// chip = ERR;
// }
//} while (!chip);

//*addr = CMD_READ_ARRAY;

//if (chip == ERR || *addr != data)
// rc = ERR_PROG_ERROR;
while(1)
{
if((*addr & 0x40)!=(*addr & 0x40))
continue;

if((*addr & 0x80)==(data & 0x80))
{
rc = ERR_OK;
break;
}
}