linux2.6.37.4内核在XC2440开发板上移植（八）USB HOST驱动移植

内核里已经做好了很完善的USB Host驱动了，可以支持大多数USB设备（如U盘，USB键盘鼠标等），同时也支持USB HUB。

在mach-xc2440.c中添加USB Host驱动的支持：

xc2440_devices[ ]结构体中加入：

&s3c_device_ohci,

s3c_device_ohci结构体的实现文件为/arch/arm/plat-samsung/dev-usb.c，系统默认没有对它的编译支持，修改同目录下的Kconfig文件：

1. config S3C_DEV_USB_HOST
2.     bool
3.     default y
4.     help
5.         Compile in platform device definition for USB host.

或修改arch/arm/mach-s3c2440/Kconfig文件：

1. config MACH_XC2440
2.     bool "XC2440 development board with S3C2440 CPU module"
3.     select CPU_S3C2440
4.     select S3C_DEV_NAND
5.     select S3C_DEV_USB_HOST
6.     help
7.         Say Y here if you are using the XC2440 development board.

配置内核，支持USB Host：

1. Device drivers --->
2.     SCSI Device support --->
3.         <*> SCSI device support
4. <*> SCSI disk support
5.     [*] HID Devices --->
6. -*- Generic HID support
7. <*> USB Human Interface Device (full HID) support
8.     [*] USB support --->
9. {*} Support for Host-side USB
10. [*] USB announce new devices
11. [*] USB device filesystem
12. <*> OHCI HCD support
13. <*> USB Mass Storage support

USB Human Interface Device (full HID) support 是对USB鼠标键盘的支持

SCSI disk support 和USB Mass Storage support 是对U盘的支持

系统启动时的调试信息：

s3c2410-ohci s3c2410-ohci: S3C24XX OHCI

s3c2410-ohci s3c2410-ohci: new USB bus registered, assigned bus number 1

s3c2410-ohci s3c2410-ohci: irq 42, io mem 0x49000000

usb usb1: New USB device found, idVendor=1d6b, idProduct=0001

usb usb1: New USB device strings: Mfr=3, Product=2, SerialNumber=1

usb usb1: Product: S3C24XX OHCI

usb usb1: Manufacturer: Linux 2.6.37.4 ohci_hcd

原创地址：http://blog.chinaunix.net/uid-22030783-id-3028206.html