因为2.6.25内核源码中并没有USB驱动的初始化程序，因此我添加了相应的代码：
在linux-2.6.25/arch/arm/mach-s3c2410/mach-smdk2410.c文件中添加：
static struct s3c2410_hcd_info usb_s3c2410_info = {
.port[0] = {
.flags = S3C_HCDFLG_USED
},
.port[1] = {
.flags = S3C_HCDFLG_USED
}
};
int __init s3c2410_init_usb(void)
{
unsigned long upllvalue;
printk("USB Control, (c) 2006 pc104\n");
s3c_device_usb.dev.platform_data = &usb_s3c2410_info;
s3c2410_modify_misccr(S3C2410_MISCCR_USBSUSPND0 |
S3C2410_MISCCR_USBSUSPND1, 0x8);
upllvalue = (0x78<<12)|(0x02<<4)|(0x03);
while(upllvalue!=__raw_readl(S3C2410_UPLLCON))
{
__raw_writel(upllvalue,S3C2410_UPLLCON);
mdelay(1);
}
return 0;
}
在此函数中添加了红色部分：
static void __init smdk2410_init(void)
{
platform_add_devices(smdk2410_devices, ARRAY_SIZE(smdk2410_devices));
smdk_machine_init();
s3c2410_init_usb();
}
其对上面代码的解释看下此帖：
http://www.linuxforum.net/forum/showflat.phpCat=&Board=embedded&Number=556915&page=0&view=collapsed&sb=5&o=0&fpart=
拷贝linux-2.6.25/arch/arm/configs/s3c2410_defconfig 缺省配置文件 并命名.config
make menuconfig 再进行配置
1.设备驱动部分设置
General setup --->
[*]Configure standard kernel features (for small systems) --->
[*] Support for hot-pluggable devices
Device Drivers --->
Generic Driver Options --->
<*> Hotplug firmware loading support
Block devices --->
<*> Low Performance USB Block driver
SCSI device support --->
<*> SCSI generic support
<*> SCSI disk support
[*] Probe all LUNs on each SCSI device
USB support --->
<*> Support for Host-side USB
[*] USB device filesystem
<*> OHCI HCD support
<*> USB Mass Storage support
[*] USB Monitor
这里我选择了SCSI设备。
2 文件系统部分设置
File systems --->
DOS/FAT/NT Filesystems --->
<*> MSDOS fs support
<*> VFAT (Windows-95) fs support
(936) Default codepage for FAT
(cp936) Default iocharset for FAT
File systems --->
Partition Types --->
[*] PC BIOS (MSDOS partition tables) support
3 加入一些字体库
Native Language Support --->
<*> Simplified Chinese charset (CP936, GB2312)
<*> NLS UTF8
但我将内核镜像烧入板中后，插入U盘 mount 挂载时出现如下错误：
Unable to load NLS charset cp437
FAT: codepage cp437 not found
mount: mounting sda1 on /mnt failed: Invalid argument
因此我又重新增加了配置选项在 Native Language Support ---> 中
File systems --->
Native Language Support --->
<*> Codepage 437 (United States, Canada)
<*> Simplified Chinese charset (CP936, GB2312)
然后再编译
make zImage
烧入镜像后插入U盘显示如下信息
sd 1:0:0:0: [sda] 129312 512-byte hardware sectors (66 MB)
sd 1:0:0:0: [sda] Write Protect is off
sd 1:0:0:0: [sda] Assuming drive cache: write through
sd 1:0:0:0: [sda] 129312 512-byte hardware sectors (66 MB)
sd 1:0:0:0: [sda] Write Protect is off
sd 1:0:0:0: [sda] Assuming drive cache: write through
sda: sda1
sda: p1 exceeds device capacity
sd 1:0:0:0: [sda] Attached SCSI removable disk
然后mount -t vfat /dev/sda1 /mnt
其中设备文件名是我在安装文件系统时生成的
在/dev/中
mknod sda1 b 8 0
加载成功