【已解决】3519的usb3.0不识别

本帖最后由 liusir 于 2017-1-9 09:38 编辑

1.现在3519的板子启动log显示usb的3.0,2.0,1.1驱动都已经加载，log如下：
xhci-hcd 10180000.xhci: xHCI Host Controller
xhci-hcd 10180000.xhci: new USB bus registered, assigned bus number 1
xhci-hcd 10180000.xhci: irq 54, io mem 0x10180000
hub 1-0:1.0: USB hub found
hub 1-0:1.0: 1 port detected
xhci-hcd 10180000.xhci: xHCI Host Controller
xhci-hcd 10180000.xhci: new USB bus registered, assigned bus number 2
hub 2-0:1.0: USB hub found
hub 2-0:1.0: 1 port detected
ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
ehci-platform: EHCI generic platform driver
ehci-platform 10120000.ehci: EHCI Host Controller
ehci-platform 10120000.ehci: new USB bus registered, assigned bus number 3
ehci-platform 10120000.ehci: irq 51, io mem 0x10120000
ehci-platform 10120000.ehci: USB 2.0 started, EHCI 1.00
hub 3-0:1.0: USB hub found
hub 3-0:1.0: 1 port detected
ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver
ohci-platform: OHCI generic platform driver
/soc/ohci@0x10110000: could not get #phy-cells for /interrupt-controller@10300000
ohci-platform 10110000.ohci: Generic Platform OHCI controller
ohci-platform 10110000.ohci: new USB bus registered, assigned bus number 4
ohci-platform 10110000.ohci: irq 52, io mem 0x10110000
hub 4-0:1.0: USB hub found
hub 4-0:1.0: 1 port detected
usbcore: registered new interface driver usb-storage

2.插入3.0U盘后，只能别成2.0，log如下：
~ # usb 3-1: USB disconnect, device number 5
usb 3-1: new high-speed USB device number 6 using ehci-platform
usb-storage 3-1:1.0: USB Mass Storage device detected
scsi host4: usb-storage 3-1:1.0
scsi 4:0:0:0: Direct-Access     Netac    OnlyDisk         1.00 PQ: 0 ANSI: 6
sd 4:0:0:0: [sda] 61440000 512-byte logical blocks: (31.4 GB/29.2 GiB)
sd 4:0:0:0: [sda] Write Protect is off
sd 4:0:0:0: [sda] Write cache: disabled, read cache: disabled, doesn't support DPO or FUA
sda: sda4
sd 4:0:0:0: [sda] Attached SCSI removable disk

有哪位前辈遇到过这种问题，麻烦指点一下，谢谢！:D

解决方案：
由于usb3.0是高速信号，所以信号线的长度有限制，重新布线缩短usb3.0信号线的长度后usb3.0可以正常识别。