Linux系统移植实验---USB驱动的移植

实验八 USB驱动的移植

【实验目的】

USB接口是现在计算机系统中最通用的一种接口，

说明：在本系统移植课程实验中命令行提示符 “$”表示是在主机上执行，“#”表示在目标板执行

【实验环境】

• 主机：ubuntu 12.04发行版

• 目标机：FS4412平台

• 交叉编译工具：arm-none-linux-gnueabi-gcc

【实验步骤】

1. 修改设备树文件

$vim  arch/arm/boot/dts/exynos4412-fs4412.dts

添加如下内容：

usbphy: usbphy@125B0000 {

#address-cells = <1>;

#size-cells = <1>;

compatible = "samsung,exynos4x12-usb2phy";

reg = <0x125B0000 0x100>;

ranges;

 

clocks = <&clock 2>, <&clock 305>;

clock-names = "xusbxti", "otg";

 

usbphy-sys {

reg = <0x10020704 0x8 0x1001021c 0x4>;

};

};

 

ehci@12580000 {

status = "okay";

usbphy = <&usbphy>;

};

usb3503@08 {

compatible = "smsc,usb3503";

reg = <0x08 0x4>;

connect-gpios = <&gpm3 3 1>;

intn-gpios = <&gpx2 3 1>;

reset-gpios = <&gpm2 4 1>;

initial-mode = <1>;

};

 

2. 配置内核

make menuconfig

Device Drivers  --->

[*] USB support  --->

<*>     EHCI HCD (USB 2.0) support

<*>     EHCI support for Samsung S5P/EXYNOS SoC Series

<*>     USB Mass Storage support

<*>   USB3503 HSIC to USB20 Driver

USB Physical Layer drivers  --->

<*> Samsung USB 2.0 PHY controller Driver

SCSI device support  --->

<*> SCSI device support

<*> SCSI disk support

<*> SCSI generic support

3. 编译内核和设备树

$ make uImage

$ make dtbs

4. 测试：

拷贝内核和设备树文件到/tftpboot目录下

$ cp  arm/arm/boot/uImage  /tftpboot

$cp  arch/arm/boot/dts/exynos4412-fs4412.dtb /tftpboot/

启动目标板并在目标板上完成如下操作：

插入U盘显示如下

[   72.695000] usb 1-3.2: USB disconnect, device number 3

[   74.435000] usb 1-3.2: new high-speed USB device number 4 using exynos-ehci

[   74.555000] usb-storage 1-3.2:1.0: USB Mass Storage device detected

[   74.560000] scsi1 : usb-storage 1-3.2:1.0

[   75.645000] scsi 1:0:0:0: Direct-Access     Kingston DataTraveler 160 PMAP PQ: 0 ANSI: 4

[   75.660000] sd 1:0:0:0: Attached scsi generic sg0 type 0

[   76.695000] sd 1:0:0:0: [sda] 15556608 512-byte logical blocks: (7.96 GB/7.41 GiB)

[   76.700000] sd 1:0:0:0: [sda] Write Protect is off

[   76.705000] sd 1:0:0:0: [sda] No Caching mode page found

[   76.710000] sd 1:0:0:0: [sda] Assuming drive cache: write through

[   76.725000] sd 1:0:0:0: [sda] No Caching mode page found

[   76.730000] sd 1:0:0:0: [sda] Assuming drive cache: write through

[   76.760000]  sda: sda1 (sda是设备名sda1是分区名)

[   76.770000] sd 1:0:0:0: [sda] No Caching mode page found

[   76.770000] sd 1:0:0:0: [sda] Assuming drive cache: write through

[   76.780000] sd 1:0:0:0: [sda] Attached SCSI removable disk

在终端上执行挂载的设备与上边显示相关

# mount  -t  vfat  /dev/sda1 /mnt

# ls

可以查看到U盘内容，即完成实验。