2011-03-20 23:06:24
学习笔记:
效果图：
参考步骤:
一，把smdk2410 # 改成apple2440 #
1,在board/samsung/apple2440/apple2440.c中修改
if(gpio->GSTATUS1==0x32440001)
/* arch number of SMDK2410-Board */
gd->bd->bi_arch_number = MACH_TYPE_APPLE2440;
else
gd->bd->bi_arch_number = MACH_TYPE_SMDK2410;
2,在arch/arm/include/asm/mach-types.h中修改
#define CONFIG_SYS_PROMPT "APPLE2440 # "
二，增加EN29LV160AB norflash驱动
1，修改include/configs/apple2440.h
#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
//第175行添加如下内容
#define CONFIG_EON_29LV160AB
1 //添加TQ2440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 (35) //根据EN29LV160AB的芯片手册描述，共35个扇区
#define
CONFIG_ENV_ADDR
(CONFIG_SYS_FLASH_BASE + 0xF0000) //暂设置环境变量的首地址为0xF0000 //在此处放uboot参数
2，在include/flash.h添加
在181行添加
#define EON_ID_LV160AB 0x22492249
3，在board/samsung/smdk2440/flash.c中修改
#define MAIN_SECT_SIZE 0x8000 //定义为32k，主要扇区的大小
============================================================
由数据手册可知EN29LV160AB第0扇区大小为8K，第1、2为4K，第3为16K，后面31扇区为32K。前面4个扇区加起来刚好是主要扇区的大小 = 32K, 所以修改87行下如下
for (j = 0; j < flash_info[i].sector_count; j++)
{
if (j <= 3)
{
/* 1st one is 8 KB */
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;
}
}
else
{
flash_info[i].start[j] = flashbase + (j -
3) * MAIN_SECT_SIZE;
}
}
size += flash_info[i].size;
==========================================================
修改flash_print_info，添加EN29LV160AB相关信息如下：
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 & FLASH_TYPEMASK):
printf ("1x EN29LV160AB (16Mbit)\n");
break;
default:
printf ("Unknown Chip Type\n");
goto Done;
break;
}
================================================
修改int flash_erase (flash_info_t * info, int s_first, int s_last)
if ((info->flash_id & FLASH_VENDMASK) !=
(EON_MANUFACT & FLASH_VENDMASK)) {
return ERR_UNKNOWN_FLASH_VENDOR;
=========================================
添加
#elif defined(CONFIG_EON_29LV160AB) //在CONFIG_AMD_LV800后面添加EON_ID_LV160AB
(EON_MANUFACT & FLASH_VENDMASK) |
(EON_ID_LV160AB & FLASH_TYPEMASK);
4，至此，uboot关于Norflash已经移植好
make distclean
make smdk2440_config
make即可生成u-boot.bin