Hi all
目前有个USB 的问题。
1.USB hub插入 Host设备后,刚开始一段时间 工作是正常的，但是过2分钟后，HUB这边就不能识别了，后续插入HUB，DP端都会被拉成2.9V的电压，而不是一个脉冲。
2.然后获取描述符时一直会timeout。
DP一直为高 会是怎么造成了？拔出来后，当然为低了，只是插进去 不是一个脉冲，无法握手。
[ 157.906043] usb 1-1: usb-storage timed out on ep0out len=0/0
[ 157.910723] hub 1-1:1.0: cannot reset port 3 (err = -110)
[ 157.916123] hub 1-1:1.0: port 3 not enabled, trying reset again...
[ 158.946778] usb 1-1: usb-storage timed out on ep0out len=0/0
[ 158.952693] hub 1-1:1.0: cannot reset port 3 (err = -110)
[ 158.957060] hub 1-1:1.0: port 3 not enabled, trying reset again...
[ 159.987049] usb 1-1: usb-storage timed out on ep0out len=0/0
[ 159.992683] hub 1-1:1.0: cannot reset port 3 (err = -110)
[ 159.997075] hub 1-1:1.0: port 3 not enabled, trying reset again...
[ 161.027654] usb 1-1: usb-storage timed out on ep0out len=0/0
[ 161.032589] hub 1-1:1.0: cannot reset port 3 (err = -110)
[ 161.037679] hub 1-1:1.0: port 3 not enabled, trying reset again...
[ 161.043945] hub 1-1:1.0: Cannot enable port 3. Maybe the USB cable is bad?
[ 162.067290] usb 1-1: usb-storage timed out on ep0out len=0/0
[ 162.072155] hub 1-1:1.0: cannot disable port 3 (err = -110)
[ 162.077496] hub 1-1:1.0: logical disconnect on port 3
[ 163.107589] usb 1-1: usb-storage timed out on ep0out len=0/0
[ 163.112312] hub 1-1:1.0: cannot disable port 3 (err = -110)
[ 163.118335] hub 1-1:1.0: state 7 ports 4 chg 0008 evt 0000 |
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