Usb poweroff and power on tplink mr3420 v5

Installing and Using OpenWrt
1

hi,
i trying reset usb modem with cli gpio instructions but debug not says the pin usb
i can be otherwise?

openWrt 18.06.4, r7808-ef686b7292

@OpenWrt:~# cat /sys/kernel/debug/gpio
gpiochip0: GPIOs 0-31, parent: platform/10000600.gpio, 10000600.gpio:
 gpio-2   (                    |tl-mr3420-v5:green:p) out lo
 gpio-3   (                    |tl-mr3420-v5:green:u) out lo
 gpio-4   (                    |tl-mr3420-v5:amber:w) out hi
 gpio-5   (                    |tl-mr3420-v5:green:w) out hi

gpiochip1: GPIOs 32-63, parent: platform/10000600.gpio, 10000600.gpio:
 gpio-37  (                    |tl-mr3420-v5:green:w) out hi
 gpio-38  (                    |reset               ) in  hi
 gpio-41  (                    |tl-mr3420-v5:green:l) out hi
 gpio-44  (                    |tl-mr3420-v5:green:w) out lo
 gpio-46  (                    |rfkill              ) in  hi

gpiochip2: GPIOs 64-95, parent: platform/10000600.gpio, 10000600.gpio:
root@OpenWrt:~# 



oot@OpenWrt:~# cat /sys/kernel/debug/usb/devices

T:  Bus=01 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#=  1 Spd=480  MxCh= 1
B:  Alloc=  1/800 us ( 0%), #Int=  1, #Iso=  0
D:  Ver= 2.00 Cls=09(hub  ) Sub=00 Prot=00 MxPS=64 #Cfgs=  1
P:  Vendor=1d6b ProdID=0002 Rev= 4.14
S:  Manufacturer=Linux 4.14.131 ehci_hcd
S:  Product=EHCI Host Controller
S:  SerialNumber=101c0000.ehci
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#=  3 Spd=480  MxCh= 0
D:  Ver= 2.00 Cls=00(>ifc ) Sub=00 Prot=00 MxPS=64 #Cfgs=  1
P:  Vendor=19d2 ProdID=0117 Rev= 0.00
S:  Manufacturer=ZTE,Incorporated
S:  Product=ZTE WCDMA Technologies MSM
C:* #Ifs= 3 Cfg#= 1 Atr=c0 MxPwr=500mA
I:* If#= 0 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=ff Prot=ff Driver=option
E:  Ad=81(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
E:  Ad=01(O) Atr=02(Bulk) MxPS= 512 Ivl=4ms
I:* If#= 1 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=ff Prot=ff Driver=option
E:  Ad=82(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
E:  Ad=02(O) Atr=02(Bulk) MxPS= 512 Ivl=4ms
I:* If#= 2 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=ff Prot=ff Driver=option
E:  Ad=83(I) Atr=03(Int.) MxPS=  64 Ivl=2ms
E:  Ad=84(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
E:  Ad=03(O) Atr=02(Bulk) MxPS= 512 Ivl=4ms

T:  Bus=02 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#=  1 Spd=12   MxCh= 1
B:  Alloc=  0/900 us ( 0%), #Int=  0, #Iso=  0
D:  Ver= 1.10 Cls=09(hub  ) Sub=00 Prot=00 MxPS=64 #Cfgs=  1
P:  Vendor=1d6b ProdID=0001 Rev= 4.14
S:  Manufacturer=Linux 4.14.131 ohci_hcd
S:  Product=Generic Platform OHCI controller
S:  SerialNumber=101c1000.ohci
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
2

does not seem to have USB power controlled by GPIO



1 Like
3

ahhhh now I understand, I can't manipulate usb power via gpio.
Now install usbreset and it says that you have successfully restarted the usb but I can physically see that the modem led never went out.

Is usbreset a logical restart? Isn't it an electrical reset?

4

No it's not powercycle, it's logic reset of the connection.

Try with the bind/unbind method (or google about this usb interface) https://loginroot.com/wp/power-off-and-on-usb-device-in-linux-ubuntu/

1 Like
5

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