Linux开发板休眠唤醒后所有USB不能工作了

[foowerwhysored]

输入命令休眠：echo mem > /sys/power/state
唤醒后就出现这样的情况：
Successfully put all powerdomains to target state
ehci-omap ehci-omap.0: port 1 resume error -110
hub 1-0:1.0: hub_port_status failed (err = -32)
pm_op(): usb_dev_resume+0x0/0x8 returns -32
PM: Device 1-1 failed to resume: error -32
Restarting tasks ...
usb 1-1: USB disconnect, address 2
usb 1-1.2: USB disconnect, address 3
done.
hub 1-0:1.0: cannot reset port 1 (err = -32)
hub 1-0:1.0: cannot reset port 1 (err = -32)
hub 1-0:1.0: cannot reset port 1 (err = -32)
hub 1-0:1.0: cannot reset port 1 (err = -32)
hub 1-0:1.0: cannot reset port 1 (err = -32)
hub 1-0:1.0: Cannot enable port 1. Maybe the USB cable is bad?
hub 1-0:1.0: cannot reset port 1 (err = -32)
hub 1-0:1.0: cannot reset port 1 (err = -32)
hub 1-0:1.0: cannot reset port 1 (err = -32)
hub 1-0:1.0: cannot reset port 1 (err = -32)
hub 1-0:1.0: cannot reset port 1 (err = -32)
hub 1-0:1.0: Cannot enable port 1. Maybe the USB cable is bad?
hub 1-0:1.0: cannot reset port 1 (err = -32)
hub 1-0:1.0: cannot reset port 1 (err = -32)
hub 1-0:1.0: cannot reset port 1 (err = -32)
hub 1-0:1.0: cannot reset port 1 (err = -32)
hub 1-0:1.0: cannot reset port 1 (err = -32)
hub 1-0:1.0: Cannot enable port 1. Maybe the USB cable is bad?
hub 1-0:1.0: cannot reset port 1 (err = -32)
hub 1-0:1.0: cannot reset port 1 (err = -32)
hub 1-0:1.0: cannot reset port 1 (err = -32)
hub 1-0:1.0: cannot reset port 1 (err = -32)
hub 1-0:1.0: cannot reset port 1 (err = -32)
hub 1-0:1.0: Cannot enable port 1. Maybe the USB cable is bad?
hub 1-0:1.0: unable to enumerate USB device on port 1
root@dm37x-evm:~# ehci-omap ehci-omap.0: port 1 resume error -110
hub 1-0:1.0: hub_port_status failed (err = -32)
就这样所有的USB设备都不能用了，不管是U盘还是USB无线网卡，插上去一丁点反应都没有了，输入命令：fdisk -l 也看不到设备号，求各位大神帮忙分析下

[foowerwhysored]

我唤醒就是给串口发送数据让它唤醒的，该怎么做让usb controller恢复到正确的状态啊？或者如何在休眠前作保存清理啊？新手求指导啊！

[沭水河畔]

这段代码看起来像恢复代码，楼主搜索一下里面的关键字吧。 SDK里应该有专门章节讲电源管理（休眠/唤醒）才对。

Successfully put all powerdomains to target state
ehci-omap ehci-omap.0: port 1 resume error -110
hub 1-0:1.0: hub_port_status failed (err = -32)
pm_op(): usb_dev_resume+0x0/0x8 returns -32
PM: Device 1-1 failed to resume: error -32
Restarting tasks ... 
usb 1-1: USB disconnect, address 2
usb 1-1.2: USB disconnect, address 3
done.

[tug]

看log是resume失败了，查下resume

[沭水河畔]

感觉楼主的唤醒流程没有把usb controller恢复到正确的状态。 或者进入修面前，没有做必要的保存/清理。

[foowerwhysored]

多谢楼上的各位的解答，我看看

[hanqingwu]

是的， 从log上看 休眠唤醒 出错了，看下是不是哪里配置不对吧。

[foowerwhysored]

怎么配置啊，是要重新配置内核还是要修改某些文件吗？

[foowerwhysored]

我使劲顶

[HeroKern]

我利用按键来唤醒或者只用rtc来唤醒，但是一按下按键或者rtc时间到了都是直接复位，而不是恢复打原来的状态。跟复位按键效果是一样的，不知道是什么原因