(三) 查看USB设备

---

title: 查看USB设备

date: 2019/4/23 19:10:00

toc: true

查看USB设备

原文更详细参考

目录

• title: 查看USB设备date: 2019/4/23 19:10:00toc: true

lsusb

# 列出所有设备
$ lsusb
Bus 001 Device 002: ID 05a3:9310 ARC International
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 002 Device 003: ID 0e0f:0002 VMware, Inc. Virtual USB Hub
Bus 002 Device 002: ID 0e0f:0003 VMware, Inc. Virtual Mouse
Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub

# 打印指定USB设备的具体的描述符 -d 指定usb -v 显示详细信息
lsusb -d 05a3:9310 -v

ll /sys/bus/usb/devices

其中 usbx/第x个总线，x-y:a.b/的目录格式，x表示总线号，y表示端口，a表示配置，b表示接口。 更详细的子目录查看

book@100ask:/sys/bus/usb/devices$ cd /sys/bus/usb/devices
book@100ask:/sys/bus/usb/devices$ ls
1-0:1.0  1-1  1-1:1.0  1-1:1.1  1-1:1.2  1-1:1.3  2-0:1.0  2-1  2-1:1.0  2-2  2-2:1.0  usb1  usb2
book@100ask:/sys/bus/usb/devices$ ll
总用量 0
drwxr-xr-x 2 root root 0 4月  18 18:04 ./
drwxr-xr-x 4 root root 0 4月  18 17:29 ../
lrwxrwxrwx 1 root root 0 4月  18 17:29 1-0:1.0 -> ../../../devices/pci0000:00/0000:00:11.0/0000:02:03.0/usb1/1-0:1.0/
lrwxrwxrwx 1 root root 0 4月  18 18:04 1-1 -> ../../../devices/pci0000:00/0000:00:11.0/0000:02:03.0/usb1/1-1/
lrwxrwxrwx 1 root root 0 4月  18 18:04 1-1:1.0 -> ../../../devices/pci0000:00/0000:00:11.0/0000:02:03.0/usb1/1-1/1-1:1.0/
lrwxrwxrwx 1 root root 0 4月  18 18:04 1-1:1.1 -> ../../../devices/pci0000:00/0000:00:11.0/0000:02:03.0/usb1/1-1/1-1:1.1/
lrwxrwxrwx 1 root root 0 4月  18 18:04 1-1:1.2 -> ../../../devices/pci0000:00/0000:00:11.0/0000:02:03.0/usb1/1-1/1-1:1.2/
lrwxrwxrwx 1 root root 0 4月  18 18:04 1-1:1.3 -> ../../../devices/pci0000:00/0000:00:11.0/0000:02:03.0/usb1/1-1/1-1:1.3/
lrwxrwxrwx 1 root root 0 4月  18 17:29 2-0:1.0 -> ../../../devices/pci0000:00/0000:00:11.0/0000:02:00.0/usb2/2-0:1.0/
lrwxrwxrwx 1 root root 0 4月  18 17:29 2-1 -> ../../../devices/pci0000:00/0000:00:11.0/0000:02:00.0/usb2/2-1/
lrwxrwxrwx 1 root root 0 4月  18 17:29 2-1:1.0 -> ../../../devices/pci0000:00/0000:00:11.0/0000:02:00.0/usb2/2-1/2-1:1.0/
lrwxrwxrwx 1 root root 0 4月  18 17:29 2-2 -> ../../../devices/pci0000:00/0000:00:11.0/0000:02:00.0/usb2/2-2/
lrwxrwxrwx 1 root root 0 4月  18 17:29 2-2:1.0 -> ../../../devices/pci0000:00/0000:00:11.0/0000:02:00.0/usb2/2-2/2-2:1.0/
lrwxrwxrwx 1 root root 0 4月  18 17:29 usb1 -> ../../../devices/pci0000:00/0000:00:11.0/0000:02:03.0/usb1/
lrwxrwxrwx 1 root root 0 4月  18 17:29 usb2 -> ../../../devices/pci0000:00/0000:00:11.0/0000:02:00.0/usb2/

cat /sys/kernel/debug/usb/devices

信息的详细解析可以参照 Linux源代码中 Documentation/usb/proc_usb_info.txt 文件

book@100ask:/sys/bus/usb/devices$ sudo cat  /sys/kernel/debug/usb/devices
[sudo] book 的密码：

T:  Bus=01 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#=  1 Spd=480  MxCh= 6
B:  Alloc=  0/800 us ( 0%), #Int=  0, #Iso=  0
D:  Ver= 2.00 Cls=09(hub  ) Sub=00 Prot=00 MxPS=64 #Cfgs=  1
P:  Vendor=1d6b ProdID=0002 Rev= 4.13
S:  Manufacturer=Linux 4.13.0-36-generic ehci_hcd
S:  Product=EHCI Host Controller
S:  SerialNumber=0000:02:03.0
C:* #Ifs= 1 Cfg#= 1 Atr=e0 MxPwr=  0mA
I:* If#= 0 Alt= 0 #EPs= 1 Cls=09(hub  ) Sub=00 Prot=00 Driver=hub
E:  Ad=81(I) Atr=03(Int.) MxPS=   4 Ivl=256ms

T:  Bus=01 Lev=01 Prnt=01 Port=00 Cnt=01 Dev#=  2 Spd=480  MxCh= 0
D:  Ver= 2.00 Cls=ef(misc ) Sub=02 Prot=01 MxPS=64 #Cfgs=  1
P:  Vendor=05a3 ProdID=9310 Rev= 0.00
S:  Manufacturer=HD Camera Manufacturer
S:  Product=USB 2.0 Camera
C:* #Ifs= 4 Cfg#= 1 Atr=80 MxPwr=500mA
A:  FirstIf#= 0 IfCount= 2 Cls=0e(video) Sub=03 Prot=00
A:  FirstIf#= 2 IfCount= 2 Cls=01(audio) Sub=00 Prot=00
I:* If#= 0 Alt= 0 #EPs= 1 Cls=0e(video) Sub=01 Prot=00 Driver=uvcvideo
E:  Ad=83(I) Atr=03(Int.) MxPS=  16 Ivl=4ms
I:* If#= 1 Alt= 0 #EPs= 0 Cls=0e(video) Sub=02 Prot=00 Driver=uvcvideo
I:  If#= 1 Alt= 1 #EPs= 1 Cls=0e(video) Sub=02 Prot=00 Driver=uvcvideo
E:  Ad=81(I) Atr=05(Isoc) MxPS= 128 Ivl=125us
I:  If#= 1 Alt= 2 #EPs= 1 Cls=0e(video) Sub=02 Prot=00 Driver=uvcvideo
E:  Ad=81(I) Atr=05(Isoc) MxPS= 256 Ivl=125us
I:  If#= 1 Alt= 3 #EPs= 1 Cls=0e(video) Sub=02 Prot=00 Driver=uvcvideo
E:  Ad=81(I) Atr=05(Isoc) MxPS= 800 Ivl=125us
I:  If#= 1 Alt= 4 #EPs= 1 Cls=0e(video) Sub=02 Prot=00 Driver=uvcvideo
E:  Ad=81(I) Atr=05(Isoc) MxPS=1600 Ivl=125us
I:  If#= 1 Alt= 5 #EPs= 1 Cls=0e(video) Sub=02 Prot=00 Driver=uvcvideo
E:  Ad=81(I) Atr=05(Isoc) MxPS=2400 Ivl=125us
I:  If#= 1 Alt= 6 #EPs= 1 Cls=0e(video) Sub=02 Prot=00 Driver=uvcvideo
E:  Ad=81(I) Atr=05(Isoc) MxPS=3072 Ivl=125us
I:* If#= 2 Alt= 0 #EPs= 0 Cls=01(audio) Sub=01 Prot=00 Driver=snd-usb-audio
I:* If#= 3 Alt= 0 #EPs= 0 Cls=01(audio) Sub=02 Prot=00 Driver=snd-usb-audio
I:  If#= 3 Alt= 1 #EPs= 1 Cls=01(audio) Sub=02 Prot=00 Driver=snd-usb-audio
E:  Ad=84(I) Atr=05(Isoc) MxPS= 400 Ivl=1ms

T:  Bus=02 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#=  1 Spd=12   MxCh= 2
B:  Alloc= 17/900 us ( 2%), #Int=  1, #Iso=  0
D:  Ver= 1.10 Cls=09(hub  ) Sub=00 Prot=00 MxPS=64 #Cfgs=  1
P:  Vendor=1d6b ProdID=0001 Rev= 4.13
S:  Manufacturer=Linux 4.13.0-36-generic uhci_hcd
S:  Product=UHCI Host Controller
S:  SerialNumber=0000:02:00.0
C:* #Ifs= 1 Cfg#= 1 Atr=e0 MxPwr=  0mA
I:* If#= 0 Alt= 0 #EPs= 1 Cls=09(hub  ) Sub=00 Prot=00 Driver=hub
E:  Ad=81(I) Atr=03(Int.) MxPS=   2 Ivl=255ms

T:  Bus=02 Lev=01 Prnt=01 Port=00 Cnt=01 Dev#=  2 Spd=12   MxCh= 0
D:  Ver= 1.10 Cls=00(>ifc ) Sub=00 Prot=00 MxPS= 8 #Cfgs=  1
P:  Vendor=0e0f ProdID=0003 Rev= 1.03
S:  Manufacturer=VMware
S:  Product=VMware Virtual USB Mouse
C:* #Ifs= 1 Cfg#= 1 Atr=c0 MxPwr=  0mA
I:* If#= 0 Alt= 0 #EPs= 1 Cls=03(HID  ) Sub=01 Prot=02 Driver=usbhid
E:  Ad=81(I) Atr=03(Int.) MxPS=   8 Ivl=1ms

T:  Bus=02 Lev=01 Prnt=01 Port=01 Cnt=02 Dev#=  3 Spd=12   MxCh= 7
D:  Ver= 1.10 Cls=09(hub  ) Sub=00 Prot=00 MxPS= 8 #Cfgs=  1
P:  Vendor=0e0f ProdID=0002 Rev= 1.00
S:  Product=VMware Virtual USB Hub
C:* #Ifs= 1 Cfg#= 1 Atr=e0 MxPwr=  0mA
I:* If#= 0 Alt= 0 #EPs= 1 Cls=09(hub  ) Sub=00 Prot=00 Driver=hub
E:  Ad=81(I) Atr=03(Int.) MxPS=   1 Ivl=255ms

解析如下

Each line is tagged with a one-character ID for that line:

T = Topology (etc.)
B = Bandwidth (applies only to USB host controllers, which are
    virtualized as root hubs)
D = Device descriptor info.
P = Product ID info. (from Device descriptor, but they won't fit
    together on one line)
S = String descriptors.
C = Configuration descriptor info. (* = active configuration)
I = Interface descriptor info.
E = Endpoint descriptor info.

Legend:
  d = decimal number (may have leading spaces or 0's)
  x = hexadecimal number (may have leading spaces or 0's)
  s = string

Topology info:

T:  Bus=dd Lev=dd Prnt=dd Port=dd Cnt=dd Dev#=ddd Spd=dddd MxCh=dd
|   |      |      |       |       |      |        |        |__MaxChildren
|   |      |      |       |       |      |        |__Device Speed in Mbps
|   |      |      |       |       |      |__DeviceNumber
|   |      |      |       |       |__Count of devices at this level
|   |      |      |       |__Connector/Port on Parent for this device
|   |      |      |__Parent DeviceNumber
|   |      |__Level in topology for this bus
|   |__Bus number
|__Topology info tag

    Speed may be:
        1.5 Mbit/s for low speed USB
    12  Mbit/s for full speed USB
    480 Mbit/s for high speed USB (added for USB 2.0);
          also used for Wireless USB, which has no fixed speed
    5000    Mbit/s for SuperSpeed USB (added for USB 3.0)

    For reasons lost in the mists of time, the Port number is always
    too low by 1.  For example, a device plugged into port 4 will
    show up with "Port=03".

Bandwidth info:
B:  Alloc=ddd/ddd us (xx%), #Int=ddd, #Iso=ddd
|   |                       |         |__Number of isochronous requests
|   |                       |__Number of interrupt requests
|   |__Total Bandwidth allocated to this bus
|__Bandwidth info tag

    Bandwidth allocation is an approximation of how much of one frame
    (millisecond) is in use.  It reflects only periodic transfers, which
    are the only transfers that reserve bandwidth.  Control and bulk
    transfers use all other bandwidth, including reserved bandwidth that
    is not used for transfers (such as for short packets).

    The percentage is how much of the "reserved" bandwidth is scheduled by
    those transfers.  For a low or full speed bus (loosely, "USB 1.1"),
    90% of the bus bandwidth is reserved.  For a high speed bus (loosely,
    "USB 2.0") 80% is reserved.

Device descriptor info & Product ID info:

D:  Ver=x.xx Cls=xx(s) Sub=xx Prot=xx MxPS=dd #Cfgs=dd
P:  Vendor=xxxx ProdID=xxxx Rev=xx.xx

where
D:  Ver=x.xx Cls=xx(sssss) Sub=xx Prot=xx MxPS=dd #Cfgs=dd
|   |        |             |      |       |       |__NumberConfigurations
|   |        |             |      |       |__MaxPacketSize of Default Endpoint
|   |        |             |      |__DeviceProtocol
|   |        |             |__DeviceSubClass
|   |        |__DeviceClass
|   |__Device USB version
|__Device info tag #1

where
P:  Vendor=xxxx ProdID=xxxx Rev=xx.xx
|   |           |           |__Product revision number
|   |           |__Product ID code
|   |__Vendor ID code
|__Device info tag #2

String descriptor info:

S:  Manufacturer=ssss
|   |__Manufacturer of this device as read from the device.
|      For USB host controller drivers (virtual root hubs) this may
|      be omitted, or (for newer drivers) will identify the kernel
|      version and the driver which provides this hub emulation.
|__String info tag

S:  Product=ssss
|   |__Product description of this device as read from the device.
|      For older USB host controller drivers (virtual root hubs) this
|      indicates the driver; for newer ones, it's a product (and vendor)
|      description that often comes from the kernel's PCI ID database.
|__String info tag

S:  SerialNumber=ssss
|   |__Serial Number of this device as read from the device.
|      For USB host controller drivers (virtual root hubs) this is
|      some unique ID, normally a bus ID (address or slot name) that
|      can't be shared with any other device.
|__String info tag

Configuration descriptor info:

C:* #Ifs=dd Cfg#=dd Atr=xx MPwr=dddmA
| | |       |       |      |__MaxPower in mA
| | |       |       |__Attributes
| | |       |__ConfiguratioNumber
| | |__NumberOfInterfaces
| |__ "*" indicates the active configuration (others are " ")
|__Config info tag

    USB devices may have multiple configurations, each of which act
    rather differently.  For example, a bus-powered configuration
    might be much less capable than one that is self-powered.  Only
    one device configuration can be active at a time; most devices
    have only one configuration.

    Each configuration consists of one or more interfaces.  Each
    interface serves a distinct "function", which is typically bound
    to a different USB device driver.  One common example is a USB
    speaker with an audio interface for playback, and a HID interface
    for use with software volume control.

Interface descriptor info (can be multiple per Config):

I:* If#=dd Alt=dd #EPs=dd Cls=xx(sssss) Sub=xx Prot=xx Driver=ssss
| | |      |      |       |             |      |       |__Driver name
| | |      |      |       |             |      |          or "(none)"
| | |      |      |       |             |      |__InterfaceProtocol
| | |      |      |       |             |__InterfaceSubClass
| | |      |      |       |__InterfaceClass
| | |      |      |__NumberOfEndpoints
| | |      |__AlternateSettingNumber
| | |__InterfaceNumber
| |__ "*" indicates the active altsetting (others are " ")
|__Interface info tag

    A given interface may have one or more "alternate" settings.
    For example, default settings may not use more than a small
    amount of periodic bandwidth.  To use significant fractions
    of bus bandwidth, drivers must select a non-default altsetting.

    Only one setting for an interface may be active at a time, and
    only one driver may bind to an interface at a time.  Most devices
    have only one alternate setting per interface.

Endpoint descriptor info (can be multiple per Interface):

E:  Ad=xx(s) Atr=xx(ssss) MxPS=dddd Ivl=dddss
|   |        |            |         |__Interval (max) between transfers
|   |        |            |__EndpointMaxPacketSize
|   |        |__Attributes(EndpointType)
|   |__EndpointAddress(I=In,O=Out)
|__Endpoint info tag

    The interval is nonzero for all periodic (interrupt or isochronous)
    endpoints.  For high speed endpoints the transfer interval may be
    measured in microseconds rather than milliseconds.

    For high speed periodic endpoints, the "MaxPacketSize" reflects
    the per-microframe data transfer size.  For "high bandwidth"
    endpoints, that can reflect two or three packets (for up to
    3KBytes every 125 usec) per endpoint.

    With the Linux-USB stack, periodic bandwidth reservations use the
    transfer intervals and sizes provided by URBs, which can be less
    than those found in endpoint descriptor.

dmesg

#sudo rmmod uvcvideo
#sudo modprobe uvcvideo
#dmesg

[ 5066.889529] usbcore: deregistering interface driver uvcvideo
[ 5146.884778] uvcvideo: Found UVC 1.00 device USB 2.0 Camera (05a3:9310)
[ 5146.904548] uvcvideo 1-1:1.0: Entity type for entity Extension 4 was not initialized!
[ 5146.904550] uvcvideo 1-1:1.0: Entity type for entity Processing 3 was not initialized!
[ 5146.904551] uvcvideo 1-1:1.0: Entity type for entity Camera 1 was not initialized!
[ 5146.905329] input: USB 2.0 Camera: HD USB Camera as /devices/pci0000:00/0000:00:11.0/0000:02:03.0/usb1/1-1/1-1:1.0/input/input7
[ 5146.905954] usbcore: registered new interface driver uvcvideo
[ 5146.905955] USB Video Class driver (1.1.1)