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【转】u盘驱动过程（linux－2.6.24）

标签：u盘 驱动 过程 　　　[推送到技术圈]

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u盘驱动过程（linux－2.6.24）

第一次编译出的问题：
[root@/]#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

解决办法：

去掉了        Device Drivers   －－》
            <*> Real Time Clock 前的＊

第二次编译出现问题：
插入u盘时的显示：
[root@/]#usb 1-1: new full speed USB device using s3c2410-ohci and address 3    
                                                                                
usb 1-1: configuration #1 chosen from 1 choice                                 
                                                                               
scsi1 : SCSI emulation for USB Mass Storage devices                            
                                                                               
scsi 1:0:0:0: Direct-Access     Kingston DataTraveler2.0  1.00 PQ: 0 ANSI: 2   
                                                                               
sd 1:0:0:0: [sda] 3903359 512-byte hardware sectors (1999 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] 3903359 512-byte hardware sectors (1999 MB)                  
                                                                               
sd 1:0:0:0: [sda] Write Protect is off                                         
                                                                               
sd 1:0:0:0: [sda] Assuming drive cache: write through                          
                                                                               
 sda: sda1                                                                     
                                                                               
sd 1:0:0:0: [sda] Attached SCSI removable disk
看似没有问题，但是在挂载的时候出现问题：
Unable to load NLS charset  cp437
FAT: codepage cp437 not found

解决办法：
在File systems－－》
                Native language support－－》
                    <*>   Codepage 437 (United States, Canada)    添加＊


第三次编译出现问题：

插入后显示和第二次一样;
挂载的时候出现问题：
Unable to load NLS charset iso8859-1                                           
                                                                               
FAT: IO charset iso8859-1 not found

解决办法：
在File systems－－》
                Native language support－－》
                    <*>   NLS ISO 8859-1  (Latin 1; Western European Languages)         添加＊

第三次编译成功挂在u盘！！！


问题补充：

如果出现以下问题：
usb 1-1: device descriptor read/64, error -110


解决办法：
修改linux-2.6.24/drivers/usb/host/ohci-s3c2410.c

添加头文件：
#include <asm/arch/regs-clock.h>

在s3c2410_start_hc里增加：

unsigned long upllvalue = (0x78<<12)|(0x02<<4)|(0x03);

while (upllvalue != __raw_readl(S3C2410_UPLLCON))
{
__raw_writel(upllvalue, S3C2410_UPLLCON);
mdelay(1);
}

本文出自 "西安铁峰电子有限公司" 博客，请务必保留此出处http://ironpeak.blog.51cto.com/439173/100490

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