S3C2410 USB的驱动

S3C2410 USB的驱动

代码修改——修改arch/arm/mach-s3c2410/mach-smdk2410.c
＋＃include
＋＃include
＋＃include
＋＃include


＋static struct s3c2410_hcd_info usb_sbc2410_info = {
＋    .port[0]        = {

＋            .flags  = S3C_HCDFLG_USED
＋     }
＋};

＋int usb_sbc2410_init(void)
＋{
＋unsigned long upllvalue = (0x78<<12)|(0x02<<4)|(0x03);
＋printk("USB Control, (c) 2006 sbc2410\n");
＋s3c_device_usb.dev.platform_data = &usb_sbc2410_info;
＋while(upllvalue!=__raw_readl(S3C2410_UPLLCON))
＋{
＋__raw_writel(upllvalue,S3C2410_UPLLCON);
＋mdelay(1);
＋}
＋return 0;
＋}

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_sbc2410_init();
}

3.内核配置
>让内核支持热插拔

General setup  --->  Support for hot-pluggable devices

>USB驱动设置

Device Drivers  --->Generic Driver Options  

                                       ---> Hotplug firmware loading support  

                                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 FS和VFAT FS支持

File systems  ---> DOS/FAT/NT Filesystems  

                                     --->  MSDOS fs support

                                             VFAT (Windows-95) fs support

                                             (936) Default codepage for FAT

                                             (cp936) Default iocharset for FAT

做完这些后，插入u盘后，内核应该可以识别到u盘，出现：
usb 1-1: new full speed USB device using s3c2410-ohci and address 3
ub(1.3): GetMaxLUN returned 0, using 1 LUNs

但是，还有下面一句出错提示：
/dev/ub/a: unknown partition table

>使能（DOS分区）CONFIG_MSDOS_PARTITION

File systems  ---> Partition Types  

                                ---> PC BIOS (MSDOS partition tables) support

以下是我的内核插入u盘后的提示信息：
usb 1-1: new full speed USB device using s3c2410-ohci and 2
ub(1.2): GetMaxLUN returned 0, using 1 LUNs
/dev/ub/a: p1
表示usb设备已经挂载到/dev/ub/a/part1目录下

>加入中文字体库

Native Language Support  

                               ---> Simplified Chinese charset (CP936, GB2312)  

                                      NLS UTF8

以下是挂载usb设备后的显示：
[root@Emux /]# mount -t vfat -o iocharset=cp936 /dev/ub/a/part1 /mnt
[root@Emux /]# ls /mnt



4.移植小结

>如果想知道内核有没有识别出u盘的话可以执行命令：cat /proc/partitions ，看看插入USB前后分区信息有什么不同就知道了  

>另外，如果想让内核把它当成SCSI设备来处理的话

Device Drivers  ---> Block devices  

                                      --->  Low Performance USB Block driver     去掉

Device Drivers  --->SCSI device support

                                      --->  SCSI disk support                                  添加

个人觉得使用usb设备的话Low Performance USB Block driver比SCSI disk要好

>一般都会新建一个/dev/sda1的链接指向usb设备的挂载点的，可以在启动文件中使用命令ln -s xxx xxx来建立这个链接