fl2440内核移植（五）——USB驱动移植

曾经终败给现在 2022-07-29 09:13 264阅读 0赞

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系统环境：Centos 6.5

板子芯片：s3c2440

内核版本：linux 3.0

编译器：arm-linux-gcc 4.5.4

作者：Lu Zengmeng <1540999272@qq.com>

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1、修改drivers/usb/serial/Kconfig

找到config USB\_SERIAL\_WWAN

将下一行的tristate删除，并添加以下两行

boolean

default y if USB\_SERIAL\_OPTION

2、修改drivers/usb/serial/option.c

添加以下代码

static int vendor = 0;

static int product = 0;

\#define OPTION\_VENDOR\_RESERVED      0XFFFF

\#define OPTION\_RESERVED\_DEVICE       0XFFFF

将static const struct usb\_device\_id option\_ids\[\]

改为static struct usb\_device\_id option\_ids\[\]

并在该结构体中添加下面一行

\{ USB\_DEVICE(OPTION\_VENDOR\_RESERVED, OPTION\_RESERVED\_DEVICE) \},

找到static int \_\_init option\_init(void)

在该函数中int retval;的下一行添加以下几行

if ((vendor>0) && (product>0))  
     \{  
          option\_ids\[0\].match\_flags = USB\_DEVICE\_ID\_MATCH\_DEVICE;  
          option\_ids\[0\].idVendor = vendor;  
          option\_ids\[0\].idProduct = product;  
          printk("Register option drvier for modem vendor=0x%04x product=0x%04x\\n", vendor, product);  
     \}

找到MODULE\_AUTHOR(DRIVER\_AUTHOR);

在这行上面添加以下代码

module\_param(vendor, int, S\_IRUGO | S\_IWUSR);  
MODULE\_PARM\_DESC(vendor, "User specified vendor ID");  
module\_param(product, int, S\_IRUGO | S\_IWUSR);  
MODULE\_PARM\_DESC(product, "User specified product ID");

3、修改arch/arm/mach-s3c2440/mach-smdk2440.c

添加头文件

\#include <mach/regs-clock.h>

\#include <linux/delay.h>

添加函数

int usb\_s3c2440\_init(void)  
 \{     
     /\* Input Frequency is 12.0000MHz, and MDEV=0x38 PDIV=2 SDIV=2, so output frequency 48.00MHz \*/  
     unsigned long upllvalue = (0x38<<12)|(0x02<<4)|(0x02);  
     while (upllvalue != \_\_raw\_readl(S3C2410\_UPLLCON))  
     \{     
         \_\_raw\_writel(upllvalue, S3C2410\_UPLLCON);  
         mdelay(1);  
     \}  
       
     return 0;  
 \}

找到smdk2440\_map\_io(void)

在该函数中添加下面一行

usb\_s3c2440\_init();

4、修改drivers/usb/host/ohci-s3c2410.c

添加头文件

\#include <mach/regs-clock.h>

找到struct s3c2410\_hcd\_info \*info = dev->dev.platform\_data;

在该行下面加入

unsigned long upllvalue = (0x38<<12)|(0x02<<4)|(0x02);  
while (upllvalue != \_\_raw\_readl(S3C2410\_UPLLCON))  
\{   
      \_\_raw\_writel(upllvalue, S3C2410\_UPLLCON);   
      mdelay(1);   
\}  
\_\_raw\_writel(upllvalue, S3C2410\_UPLLCON);

5、配置menuconfig

Device Drivers  --->

Generic Driver Options  --->

(/sbin/hotplug) path to uevent helper

\[\*\] Block devices  --->

<\*>   Low Performance USB Block driver

SCSI device support  --->

<\*> SCSI device support

<\*> SCSI generic support

\[\*\] Probe all LUNs on each SCSI device

\[\*\] USB support  --->  
              \{\*\}   Support for Host-side USB   
              \[\*\]     USB device filesystem (DEPRECATED)   
              \[\*\]     USB device class-devices (DEPRECATED)  
             <\*>     OHCI HCD support   
             <\*>   USB Mass Storage support

\[\*\] HID Devices  --->   
             -\*-  Generic HID support  
            <\*>     USB Human Interface Device (full HID) support

SCSI device support  --->  
           <\*> SCSI device support  
           \[\*\] legacy /proc/scsi/ support  
           <\*> SCSI disk support

File systems  --->  
         DOS/FAT/NT Filesystems  --->  
                     <\*> MSDOS fs support  
                    <\*> VFAT (Windows-95) fs support  
                    (437) Default codepage for FAT  
                    (iso8859-1) Default iocharset for FAT  
                    <\*> NTFS file system support  
                     \[\*\]   NTFS write support  
          Partition Types  --->  
                     \[\*\]   PC BIOS (MSDOS partition tables) support  
                     \[\*\]   Windows Logical Disk Manager (Dynamic Disk) support  
          -\*- Native language support  --->  
                     <\*>   Codepage 437 (United States, Canada)  
                     <\*>   Simplified Chinese charset (CP936, GB2312)  
                     <\*>   ASCII (United States)  
                     <\*>   NLS ISO 8859-1 (Latin 1; Western European Languages)  
                     <\*>   NLS UTF-8