TUSB8043A: Hub exception

小小怪下士

Part Number: TUSB8043A
Other Parts Discussed in Thread: TUSB8043

通过TUSB8043A的数据手册来看，TUSB8043A是个4端口的hub，但是现在我们的设备却检测出5个端口。所以想问一下可能会是什么原因引起的？

According to the data manual of TUSB8043A, TUSB8043A is a 4-port hub, but now our device has detected 5 ports. So I want to ask what might be the cause?

2 年多前

0 Kailyn Chen 2 年多前

TI__Guru**** 295050 points

您好，我不太明白您的意思，TUSB8043只有四个下行端口，您有接其他HUB级联吗？是通过什么方法检测端口的数量的？

检测到5个端口，是不是把上行USB端口也加进去了? 目前TUSB8043 能正常工作吗？

0 小小怪下士 2 年多前回复 Kailyn Chen

Prodigy 10 points

由于我们的设备连接了很多的USB设备，所以在根HUB下接了一个TUSB8043，但是通过kernel的log发现TUSB8043被识别出了五个端口，现在连接到TUSB8043下的UVC设备无法正常工作，通过来看，是在uvc初始化的时候，在usb_set_interface这里出现了错误，返回了一个错误的值-71。

kernel日志：

[2023-02-13 22:00:08.937674] INFO kernel:hub 3-1:1.0: USB hub found
[2023-02-13 22:00:08.937755] INFO kernel:hub 3-1:1.0: 5 ports detected
[2023-02-13 22:00:08.937769] INFO kernel:hub 3-1:1.0: compound device; port removable status: RRRRF
[2023-02-13 22:00:08.937778] INFO kernel:hub 3-1:1.0: individual port power switching
[2023-02-13 22:00:08.937791] INFO kernel:hub 3-1:1.0: individual port over-current protection
[2023-02-13 22:00:08.969564] INFO kernel:hub 3-1:1.0: TT per port
[2023-02-13 22:00:08.969581] INFO kernel:hub 3-1:1.0: TT requires at most 8 FS bit times (666 ns)
[2023-02-13 22:00:08.969593] INFO kernel:hub 3-1:1.0: power on to power good time: 100ms
[2023-02-13 22:00:08.969706] INFO kernel:hub 3-1:1.0: local power source is good
[2023-02-13 22:00:08.970251] INFO kernel:hub 3-1:1.0: enabling power on all ports
[2023-02-13 22:00:09.046183] INFO kernel:usb 4-1: new SuperSpeed USB device number 2 using xhci-hcd
[2023-02-13 22:00:09.066310] INFO kernel:usb 3-1-port2: status 0101 change 0001
[2023-02-13 22:00:09.066342] WARNING kernel:usb 4-1: usb_device_supports_lpm: quirks: USB_QUIRK_NO_LPM
[2023-02-13 22:00:09.066464] INFO kernel:usb 4-1: udev 2, busnum 4, minor = 385
[2023-02-13 22:00:09.066476] INFO kernel:usb 4-1: New USB device found, idVendor=0451, idProduct=8340
[2023-02-13 22:00:09.066483] INFO kernel:usb 4-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0
[2023-02-13 22:00:09.066788] INFO kernel:usb 3-1-port5: status 0101 change 0001