linux系统USB调试命令笔记
查看USB总线拓扑
lsusb -t
or
lsusb
例1 罗列当前系统下所有的USB Port
lsusb
Output:
Bus 001 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
Bus 002 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 003: ID 05c8:021e Cheng Uei Precision Industry Co., Ltd (Foxlink)
Bus 001 Device 007: ID 0cf3:3005 Atheros Communications, Inc. AR3011 Bluetooth
Bus 002 Device 003: ID 0781:5567 San Disk Corp. Cruzer Blade
参数解析：Bus 002 Device 003: ID 0781:5567 SanDisk Corp. Cruzer Blade
Bus 002 : This is bus number where SanDisk USB stick is attached.
Device 003: This is the third device attached to bus 002, the other two devices are “Linux Foundation 2.0 root hub” and ” Intel Corp. Integrated Rate Matching Hub”
ID 0781:5567 is the number given to this SanDisk, The number before : indicates the manufacture ID and number after : indicates device ID. To get more info on this visit Linux-USB site.
SanDisk Corp. Cruzer Blade is the name of manufacture and device name.
例2 检查系统下有多少可用的USB Port
find /dev/bus/
Output:
/dev/bus/
/dev/bus/usb
/dev/bus/usb/002
/dev/bus/usb/002/006
/dev/bus/usb/002/005
/dev/bus/usb/002/004
/dev/bus/usb/002/002
/dev/bus/usb/002/001
/dev/bus/usb/001
/dev/bus/usb/001/007
/dev/bus/usb/001/003
/dev/bus/usb/001/002
/dev/bus/usb/001/001
获取USB设备的详细信息
lsusb -D /dev/bus/usb/002/005
Output:
Device: ID 0951:1643 Kingston Technology Data Traveler G3 4GB
Couldn't open device, some information will be missing
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 2.00
bDeviceClass 0 (Defined at Interface level)
bDeviceSubClass 0
bDeviceProtocol 0
bMaxPacketSize0 64
idVendor 0x0951 Kingston Technology
idProduct 0x1643 DataTraveler G3 4GB
bcdDevice 1.00
iManufacturer 1
iProduct 2
iSerial 3
bNumConfigurations 1
Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 32
bNumInterfaces 1
bConfigurationValue 1
iConfiguration 0
bmAttributes 0x80
(Bus Powered)
MaxPower 200mA
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 2
bInterfaceClass 8 Mass Storage
bInterfaceSubClass 6 SCSI
bInterfaceProtocol 80 Bulk-Only
iInterface 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x81 EP 1 IN
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0200 1x 512 bytes
bInterval 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x02 EP 2 OUT
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0200 1x 512 bytes
bInterval 0
例3 获取所有可用的USB Port
lsusb -v
Clipped output:
Bus 001 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
Couldn't open device, some information will be missing
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 2.00
bDeviceClass 9 Hub
bDeviceSubClass 0 Unused
bDeviceProtocol 1 Single TT
bMaxPacketSize0 64
idVendor 0x8087 Intel Corp.
idProduct 0x0024 Integrated Rate Matching Hub
bcdDevice 0.00
iManufacturer 0
iProduct 0
iSerial 0
bNumConfigurations 1
Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 25
bNumInterfaces 1
bConfigurationValue 1
iConfiguration 0
bmAttributes 0xe0
Self Powered
Remote Wakeup
MaxPower 0mA
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 1
bInterfaceClass 9 Hub
bInterfaceSubClass 0 Unused
bInterfaceProtocol 0 Full speed (or root) hub
iInterface 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x81 EP 1 IN
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x0001 1x 1 bytes
bInterval 12
例4 罗列系统下所有大容量存储设备
lsusb -v | grep -Ei '(idVendor|Mass Storage)'
Output:
idVendor 0x2006
bInterfaceClass 8 Mass Storage
idVendor 0x0781 SanDisk Corp.
bInterfaceClass 8 Mass Storage
idVendor 0x0951 Kingston Technology
bInterfaceClass 8 Mass Storage
从上述结果可以看出，共有三个大容量存储设备挂在总线上。
例5 查找USB设备的协议版本
lsusb -v | grep -i bcdusb
Output:
bcdUSB 1.10
bcdUSB 2.00
bcdUSB 2.00
bcdUSB 2.00
USB设备依据协议版本的不同，传输速率也是不同的。下面是USB协议版本与传输速率的对应关系：
| USB 1.10 | 12Mb/s |
|---|---|
| USB 2.00 | 480Mb/s |
| USB 3.00 | 5Gb/s |
例6 以树状结构显示设备信息
lsusb -t
Otuput:
2-1.1:1.1: No such file or directory
/: Bus 02.Port 1: Dev 1, Class=root_hub, Driver=ehci_hcd/2p, 480M
|__ Port 1: Dev 2, If 0, Class=hub, Driver=hub/6p, 480M
|__ Port 1: Dev 6, If 0, Class=stor., Driver=usb-storage, 480M
|__ Port 1: Dev 6, If 1, Class=vend., Driver=, 480M
|__ Port 2: Dev 7, If 0, Class=stor., Driver=usb-storage, 480M
|__ Port 3: Dev 5, If 0, Class=stor., Driver=usb-storage, 480M
/: Bus 01.Port 1: Dev 1, Class=root_hub, Driver=ehci_hcd/2p, 480M
|__ Port 1: Dev 2, If 0, Class=hub, Driver=hub/6p, 480M
|__ Port 3: Dev 3, If 0, Class='bInterfaceClass 0x0e not yet handled', Driver=uvcvideo, 480M
|__ Port 3: Dev 3, If 1, Class='bInterfaceClass 0x0e not yet handled', Driver=uvcvideo, 480M
|__ Port 4: Dev 7, If 0, Class='bInterfaceClass 0xe0 not yet handled', Driver=btusb, 12M
|__ Port 4: Dev 7, If 1, Class='bInterfaceClass 0xe0 not yet handled', Driver=btusb, 12M
查看USB控制器的ID
cd /sys/bus/pci/drivers/xhci_hcd
ls
result
0000:00:xx.y
一旦知道了设备的ID，那么就可以通过命令disable和enable设备控制器。
//disable controller
echo -n "0000:00:xx.y" > unbind
//enable the controller
echo -n "0000:00:xx.y" > bind
USB Power On/Off
#disable external wake-up; do this only once
echo disabled > /sys/bus/usb/devices/usb1/power/wakeup
echo on > /sys/bus/usb/devices/usb1/power/control # turn on
echo suspend > /sys/bus/usb/devices/usb1/powercontrol # turn off
According to the docs, there were several changes to the USB power management from kernels 2.6.32, which seem to settle in 2.6.38. Now you'll need to wait for the device to become idle, which is governed by the particular device driver. The driver needs to support it, otherwise the device will never reach this state. Unluckily, now the user has no chance to force this. However, if you're lucky and your device can become idle, then to turn this off you need to:
echo "0" > "/sys/bus/usb/devices/usbX/power/autosuspend"
echo "auto" > "/sys/bus/usb/devices/usbX/power/level"
or, for kernels around 2.6.38 and above:
echo "0" > "/sys/bus/usb/devices/usbX/power/autosuspend_delay_ms"
echo "auto" > "/sys/bus/usb/devices/usbX/power/control"
This literally means, go suspend at the moment the device becomes idle.
So unless your fan is something "intelligent" that can be seen as a device and controlled by a driver, you probably won't have much luck on current kernels.