u-boot-2009.08在2440上的移植详解 2

#gedit?include/configs/my2440.h?//修改命令行前的名字和Nor Flash参数部分的定义

#define?CONFIG_SYS_PROMPT???"[MY2440]#"??//将命令行前的名字改成[MY2440]

?

/*-----------------------------------------------------------------------
?* FLASH and environment organization
?*/
#if?0????//注释掉下面两个类型的Nor Flash设置，因为不是我们所使用的型号
#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

#define?CONFIG_SYS_MAX_FLASH_BANKS?1??/* max number of memory banks */

#ifdef?CONFIG_AMD_LV800
#define?PHYS_FLASH_SIZE????????????0x00100000??/* 1MB */
#define?CONFIG_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
#define?CONFIG_SST_39VF1601????????1????????//添加mini2440开发板Nor Flash设置
#define?PHYS_FLASH_SIZE????????????0x200000?//我们开发板的Nor Flash是2M
#define?CONFIG_SYS_MAX_FLASH_SECT??(512)????//根据SST39VF1601的芯片手册描述，对其进行操作有两种方式：块方式和扇区方式。现采用扇区方式(sector)，1 sector = 2Kword = 4Kbyte，所以2M的Nor Flash共有512个sector
#define?CONFIG_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

//修改定义部分如下：

//#define MAIN_SECT_SIZE???0x10000
#define?MAIN_SECT_SIZE?????0x1000??//定义为4k，刚好是一个扇区的大小

//#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????(*(volatile?u16?*)(CONFIG_SYS_FLASH_BASE?+?(0x00002AAA?<<?1)))

?

//修改flash_init函数如下：
#elif?defined(CONFIG_AMD_LV800)
????????????(AMD_MANUFACT?&?FLASH_VENDMASK)?|
????????????(AMD_ID_LV800B?&?FLASH_TYPEMASK);
#elif?defined(CONFIG_SST_39VF1601)???//在CONFIG_AMD_LV800后面添加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;
}

?

//修改flash_print_info函数如下：???

case?(AMD_MANUFACT?&?FLASH_VENDMASK):
????printf?("AMD: ");
????break;
case?(SST_MANUFACT?&?FLASH_VENDMASK):????//添加SST39VF1601的
????printf?("SST:?");
????break;

case?(AMD_ID_LV800B?&?FLASH_TYPEMASK):
????printf?("1x Amd29LV800BB (8Mbit)n");
????break;
case?(SST_ID_xF1601?&?FLASH_TYPEMASK):???//添加SST39VF1601的
????printf?("1x SST39VF1610 (16Mbit)n");
????break;

?

//修改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;
????}
}

?

//修改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;?
????}
}