AnsweredAssumed Answered

How to reset USB HUB?

Question asked by jiang shao on Feb 2, 2015
Latest reply on Feb 2, 2015 by igorpadykov

我在使用一块imx6 sabre-sd开发板,它有一个USB HUB芯片(USB2514B)。



故障发生时,我如何通过软件复位USB HUB?


I am using a imx6 sabre-sd board , it has a USB HUB chip (USB2514B). Most of the time working well,

but sometimes after a period of time , USB port no power output.

use dmesg command, I can see the following messages.

How do I know when a fault occurs ?

When a fault occurs , how do I reset the USB HUB?


<6>android_work: sent uevent USB_STATE=DISCONNECTED

<7>fsl_gadget_disconnect_event: udc enter low power mode

<3>option: option_instat_callback: error -2

<3>option: option_instat_callback: error -2

<3>hub 2-1:1.0: hub_port_status failed (err = -110)

<3>hub 2-1:1.0: hub_port_status failed (err = -110)

<3>hub 2-1:1.0: cannot disable port 2 (err = -110)

<4>------------[ cut here ]------------

<4>WARNING: at /media/myandroid/work/20140609/kernel_imx/net/sched/sch_generic.c

:255 dev_watchdog+0x284/0x2a8()

<6>NETDEV WATCHDOG: eth1 (cdc_ether): transmit queue 0 timed out

<4>Modules linked in: cfg80211

<4>[<c004cfc4>] (unwind_backtrace+0x0/0x138) from [<c0081eec>] (warn_slowpath_co


<4>[<c0081eec>] (warn_slowpath_common+0x4c/0x64) from [<c0081f98>] (warn_slowpat


<4>[<c0081f98>] (warn_slowpath_fmt+0x30/0x40) from [<c04aa038>] (dev_watchdog+0x


<4>[<c04aa038>] (dev_watchdog+0x284/0x2a8) from [<c008d950>] (run_timer_softirq+


<4>[<c008d950>] (run_timer_softirq+0xf8/0x248) from [<c00879b8>] (__do_softirq+0


<4>[<c00879b8>] (__do_softirq+0xac/0x140) from [<c0087ef4>] (irq_exit+0x94/0x9c)



<4>[<c0087ef4>] (irq_exit+0x94/0x9c) from [<c00461b4>] (handle_IRQ+0x50/0xac)

<4>[<c00461b4>] (handle_IRQ+0x50/0xac) from [<c004534c>] (__irq_svc+0x4c/0xe8)

<4>[<c004534c>] (__irq_svc+0x4c/0xe8) from [<c0046468>] (default_idle+0x24/0x28)



<4>[<c0046468>] (default_idle+0x24/0x28) from [<c0046778>] (cpu_idle+0xc8/0x108)



<4>[<c0046778>] (cpu_idle+0xc8/0x108) from [<c00088bc>] (start_kernel+0x29c/0x2e


<4>[<c00088bc>] (start_kernel+0x29c/0x2ec) from [<10008040>] (0x10008040)

<4>---[ end trace 1857336724a8d525 ]---

<3>hub 2-1:1.0: hub_port_status failed (err = -110)

<6>otg udc vbus rising wakeup

<7>try_wake_up_udc: udc out low power mode

<6>android_work: did not send uevent (0 0   (null))

<6>android_work: sent uevent USB_STATE=CONNECTED

<6>android_work: sent uevent USB_STATE=DISCONNECTED

<6>android_work: sent uevent USB_STATE=CONNECTED

<6>android_usb gadget: high speed config #1: android

<6>android_work: sent uevent USB_STATE=CONFIGURED