分类: LINUX
2013-02-23 15:33:36
Linux-2.6.30 _USB_HOST 移植
USB_HOST0驱动移植
1 、修改 arch/arm/mach-s3c2410/mach-smdk2410.c 文件,添加以下部分代码:
#include
#include
#include
#include
static struct s3c2410_hcd_info usb_gec2410_info = {
.port[0] = {
.flags = S3C_HCDFLG_USED ,
}
};
int usb_gec2410_init(void)
{
unsigned long upllvalue = (0x78<<12)|(0x02<<4)|(0x03);
printk("USB Control, (c) 2009 gec2410\n");
s3c_device_usb.dev.platform_data = &usb_gec2410_info;
while(upllvalue!=__raw_readl(S3C2410_UPLLCON))
{
__raw_writel(upllvalue,S3C2410_UPLLCON);
mdelay(1);
}
return 0;
}
2 、 在static void __init smdk2410_map_io()函数中添加 usb_sbc2410_init()函数。(红色部分)
static void __init smdk2410_map_io(void)
{
s3c24xx_init_io(smdk2410_iodesc, ARRAY_SIZE(smdk2410_iodesc));
s3c24xx_init_clocks(0);
s3c24xx_init_uarts(smdk2410_uartcfgs, ARRAY_SIZE(smdk2410_uartcfgs));
s3c24xx_set_board(&smdk2410_board);
usb_gec2410_init();
}
3. 内核配置
■ 让内核支持热插拔
General setup --->
[ * ] Configure standard kernel features (for small systems) —— >
< * >Support for hot-pluggable devices
■ 让内核支持 USB 设备
Device drivers
Block devices --->
< * >Low Performance USB Block driver
SCSI device support --->
< * >SCSI generic support
< * >Probe all LUNs on each SCSI device
USB support --->
< * >Support for Host-side USB
[ * ] USB device filesystem
< * >USB Mass Storage support
< * >USB Monitor
■ 加入 MSDOS 文件系统和 VFAT 文件系统支持(为适应挂载 U 盘)
File systems --->
DOS/FAT/NT Filesystems --->
<*> MSDOS fs support
<*>VFAT (Windows-95) fs support
( 936 ) Default codepage for FAT // 更改默认值为 936
( cp936 ) Default iocharset for FAT // 更改默认值为 cp936
■ 使能( DOS 分区) CONFIG_MSDOS_PARTITION
Partition Types --->
[ * ] PC BIOS (MSDOS partition tables) support
■ 添加对中文字体库的支持
-*- Native language support --->
< * >Simplified Chinese charset (CP936, GB2312)
< * > NLS UTF8
4 、修改好源码并配置好内核选项后编译
make
5 、挂载USB设备U盘。
1)设置 mdev
# mkdir /etc/mdev.conf
创建所有设备节点
# mdev -s
2)启动实验板,查看系统分区的主次设备号。
# cat /proc/partitions
打印分区情况如下
major minor #blocks name
31 0 256 mtdblock0
31 1 3072 mtdblock1
31 2 62208 mtdblock2
插入 U 盘后 /proc/partitions 目录中增加了一个 uba 类型设备(此设备号
为 0 ),并出现 一个 uba1 的真实设备(设备号一般为 1 或大于 1 )
major minor #blocks name
31 0 256 mtdblock0
31 1 3072 mtdblock1
31 2 62208 mtdblock2
8 0 1993728 sda
8 1 1993604 sda1
3)挂载 U 盘
创建设备节点(根据所查分区情况----上面两个设备节点均可行)
mknod /dev/sda1 b 8 1
挂载
#mount -t vfat /dev/sda1 /tmp
#ls /tmp
至此,可以查看到U盘中资料。
常见错误
现象1:
[root@GEC/]#usb 1-1: new full speed USB device using s3c2410-ohci and
address 4
usb 1-1: device descriptor read/64, error -62
usb 1-1: device descriptor read/64, error -62
usb 1-1: new full speed USB device using s3c2410-ohci and address 5
usb 1-1: device descriptor read/64, error -62
usb 1-1: configuration #1 chosen from 1 choice
解决方法:去掉
Device Drivers-->
Real Time Clock
现象2:
插入 u 盘时显示:
bash-4.0# scsi 0:0:0:0: Direct-Access ChipsBnk Flash Disk 2.00 PQ:0 ANSI: 2
sd 0:0:0:0: Attached scsi generic sg0 type 0
sd 0:0:0:0: [sda] 516608 512-byte hardware sectors: (264 MB/252 MiB)
sd 0:0:0:0: [sda] Write Protect is off
sd 0:0:0:0: [sda] Assuming drive cache: write through
sd 0:0:0:0: [sda] Assuming drive cache: write through
sda: sda1
sd 0:0:0:0: [sda] Attached SCSI removable disk
并在在挂载时出现一下提示:
Unable to load NLS charset cp437
FAT: codepage cp437 not found
解决方法:添加
File systems-->
Native language support-->
Codepage 437 (United States, Canada)
现象3:
挂载时出现一下提示:
Unable to load NLS charset iso8859-1
FAT: IO charset iso8859-1 not found
解决方法:添加
File systems-->
Native language support-->
NLS ISO 8859-1 (Latin 1; Western European Languages)