usb usb1-port1: disabled by hub (EMI?), re-enabling

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原文地址::https://www.element14/community/thread/72610/l/usb-usb1-port1-disabled-by-hub-emi-re-enabling

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--Setup---

 

 

1) We are evaluating using Raspberry Pi Compute Module CM3.

2) USB-HUB and USB-UART are boarded on the IO board.

3) USB-HUB is working in Self-power mode.

4) VBUS-detect of USB-HUB uses the same 3.3V power supply as CM3.

5) Two LTE modules are connected to USB-HUB via USB-SERIAL and each LTE module takes 2A

 

 

 

 

---Protocol---

 

 

AT commands

 

 

 

 

---Problem----

 

 

The LTE modules which are connected to USB-HUB are disconnecting.This problem occurs only sometimes not always

 

 

Following are kernel Logs.

 

 

Kerenl log:

19:47:58 raspberrypi kernel: [ 9301.001438] usb usb1-port1: disabled by hub (EMI?), re-enabling...

19:47:58 raspberrypi kernel: [ 9301.001457] usb 1-1: USB disconnect, device number 11

19:47:58 raspberrypi kernel: [ 9301.001463] usb 1-1.1: USB disconnect, device number 12

19:47:58 raspberrypi kernel: [ 9301.001668] ftdi_sio ttyUSB2: error from flowcontrol urb

19:47:58 raspberrypi kernel: [ 9301.001872] ftdi_sio ttyUSB2: FTDI USB Serial Device converter now disconnected from ttyUSB2

19:47:58 raspberrypi kernel: [ 9301.001906] ftdi_sio 1-1.1:1.0: device disconnected

19:47:58 raspberrypi kernel: [ 9301.002107] ftdi_sio ttyUSB3: error from flowcontrol urb

19:47:58 raspberrypi kernel: [ 9301.003371] ftdi_sio ttyUSB3: FTDI USB Serial Device converter now disconnected from ttyUSB3

19:47:58 raspberrypi kernel: [ 9301.003429] ftdi_sio 1-1.1:1.1: device disconnected

19:47:58 raspberrypi kernel: [ 9301.010150] ftdi_sio ttyUSB4: FTDI USB Serial Device converter now disconnected from ttyUSB4

19:47:58 raspberrypi kernel: [ 9301.010212] ftdi_sio 1-1.1:1.2: device disconnected

19:47:58 raspberrypi kernel: [ 9301.010430] ftdi_sio ttyUSB5: error from flowcontrol urb

19:47:58 raspberrypi kernel: [ 9301.018012] ftdi_sio ttyUSB5: FTDI USB Serial Device converter now disconnected from ttyUSB5

 

 

 

 

---Question---

 

 

 

 

Any investigation method and solution?

本文标签： usbdisabledenablingEMIhub