Deattach usb device

Installing and Using OpenWrt
1

Hello Guys!
I have a TL-WR902ACv4 router with OpenWRT 23.05.4 installed

I need to reconnect programmatically usb modem. I found a solution using udisks (udisks --deattach), but usdisks is not presented in OpenWRT. Is there some another solution to do it?

2

There is uhubctl

3

Thanks! But there is another problem.
It says that my device status is power off, i cant connect to its panel, but LED on modem still working and when I turn it on again my ip dont change.
Have you any ideas?

4

Does running uhubctl promise power control?
Does modem go dark when power is removed?
What modem?

6 
uhubctl
uhubctl -a0
uhubctl
lsusb
uhubctl -a1
uhubctl
lsusb
7
  • Device Name: Yota Modem
  • FW version: D07C_Yota_V048

No, LED on modem is still working

root@OpenWrt:~# uhubctl
Current status for hub 2 [1d6b:0001 Linux 5.15.162 ohci_hcd Generic Platform OHCI controller 101c1000.ohci, USB 1.10, 1 ports, ppps]
  Port 1: 0100 power
Current status for hub 1 [1d6b:0002 Linux 5.15.162 ehci_hcd EHCI Host Controller 101c0000.ehci, USB 2.00, 1 ports, ppps]
  Port 1: 0503 power highspeed enable connect [1376:4e61 Marvell Mobile Composite Device Bus Mobile Composite Device Bus]

root@OpenWrt:~# uhubctl -a 0 -l 1
Current status for hub 1 [1d6b:0002 Linux 5.15.162 ehci_hcd EHCI Host Controller 101c0000.ehci, USB 2.00, 1 ports, ppps]
  Port 1: 0503 power highspeed enable connect [1376:4e61 Marvell Mobile Composite Device Bus Mobile Composite Device Bus]
Sent power off request
New status for hub 1 [1d6b:0002 Linux 5.15.162 ehci_hcd EHCI Host Controller 101c0000.ehci, USB 2.00, 1 ports, ppps]
  Port 1: 0000 off

root@OpenWrt:~# uhubctl
Current status for hub 2 [1d6b:0001 Linux 5.15.162 ohci_hcd Generic Platform OHCI controller 101c1000.ohci, USB 1.10, 1 ports, ppps]
  Port 1: 0100 power
Current status for hub 1 [1d6b:0002 Linux 5.15.162 ehci_hcd EHCI Host Controller 101c0000.ehci, USB 2.00, 1 ports, ppps]
  Port 1: 0000 off

root@OpenWrt:~# lsusb
Bus 002 Device 001: ID 1d6b:0001 Linux 5.15.162 ohci_hcd Generic Platform OHCI controller
Bus 001 Device 013: ID 1376:4e61 Marvell Mobile Composite Device Bus
Bus 001 Device 001: ID 1d6b:0002 Linux 5.15.162 ehci_hcd EHCI Host Controller

root@OpenWrt:~# uhubctl -a 1 -l 1
Current status for hub 1 [1d6b:0002 Linux 5.15.162 ehci_hcd EHCI Host Controller 101c0000.ehci, USB 2.00, 1 ports, ppps]
  Port 1: 0000 off
Sent power on request
New status for hub 1 [1d6b:0002 Linux 5.15.162 ehci_hcd EHCI Host Controller 101c0000.ehci, USB 2.00, 1 ports, ppps]
  Port 1: 0503 power highspeed enable connect [1376:4e61]

root@OpenWrt:~# uhubctl
Current status for hub 2 [1d6b:0001 Linux 5.15.162 ohci_hcd Generic Platform OHCI controller 101c1000.ohci, USB 1.10, 1 ports, ppps]
  Port 1: 0100 power
Current status for hub 1 [1d6b:0002 Linux 5.15.162 ehci_hcd EHCI Host Controller 101c0000.ehci, USB 2.00, 1 ports, ppps]
  Port 1: 0503 power highspeed enable connect [1376:4e61 Marvell Mobile Composite Device Bus Mobile Composite Device Bus]

root@OpenWrt:~# lsusb
Bus 002 Device 001: ID 1d6b:0001 Linux 5.15.162 ohci_hcd Generic Platform OHCI controller
Bus 001 Device 014: ID 1376:4e61 Marvell Mobile Composite Device Bus
Bus 001 Device 001: ID 1d6b:0002 Linux 5.15.162 ehci_hcd EHCI Host Controller
8

Seriously? You flip exactly other port.

9

I have a single physical usb2 port that i need to flip, hub2 is usb1.1
Anyway when I run uhubctl -a 0 -l 2 i get:

root@OpenWrt:~# uhubctl -a 0 -l 2
Current status for hub 2 [1d6b:0001 Linux 5.15.162 ohci_hcd Generic Platform OHCI controller 101c1000.ohci, USB 1.10, 1 ports, ppps]
  Port 1: 0100 power
Sent power off request
New status for hub 2 [1d6b:0001 Linux 5.15.162 ohci_hcd Generic Platform OHCI controller 101c1000.ohci, USB 1.10, 1 ports, ppps]
  Port 1: 0100 power

And my modem's control panel still working. So -l 1 is correct

10

I asked to do all at once.
Could happen power bit is fake and usb is fed from psu directly.

11 
root@OpenWrt:~# uhubctl -a 0
Error: changing port state for multiple hubs at once is not supported.
Use -l to limit operation to one hub!
1 Like
12

Get all off and check if reconnecting device inficates it ispowered.

13

I can get all off only one by one. And hub2 is still powered according uhubctl output:

root@OpenWrt:~# uhubctl -a 0 -l 1
Current status for hub 1 [1d6b:0002 Linux 5.15.162 ehci_hcd EHCI Host Controller 101c0000.ehci, USB 2.00, 1 ports, ppps]
  Port 1: 0503 power highspeed enable connect [1376:4e61 Marvell Mobile Composite Device Bus Mobile Composite Device Bus]
Sent power off request
New status for hub 1 [1d6b:0002 Linux 5.15.162 ehci_hcd EHCI Host Controller 101c0000.ehci, USB 2.00, 1 ports, ppps]
  Port 1: 0000 off
root@OpenWrt:~# uhubctl -a 0 -l 2
Current status for hub 2 [1d6b:0001 Linux 5.15.162 ohci_hcd Generic Platform OHCI controller 101c1000.ohci, USB 1.10, 1 ports, ppps]
  Port 1: 0100 power
Sent power off request
New status for hub 2 [1d6b:0001 Linux 5.15.162 ohci_hcd Generic Platform OHCI controller 101c1000.ohci, USB 1.10, 1 ports, ppps]
  Port 1: 0100 power

After that if I physically unplug and plug my modem, LED on it turns on again

14

Turns out power bits are fake...

If present may help:
/sys/bus/usb/devices/*/reset
(i think this is what udisk does)
/sys/bus/usb/devices/*/authorized

15

There is something wrong with your modem. They work years unattended