u-boot2010.06移植阶段三--norflash驱动

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