imx6uL调试USB2514b-1
项目中自己设计的板子，使用的imx6ul 和USBHUB 芯片 usb2514b
但是在调试中发现
[ 1.730092] usb 1-1: new full-speed USB device number 2 using ci_hdrc
[ 1.980110] usb 1-1: device no response, device descriptor read/64, error -71
[ 2.103437] usbcore: registered new interface driver usbhid
[ 2.109124] usbhid: USB HID core driver
[ 2.450128] usb 1-1: device no response, device descriptor read/64, error -71
[ 2.680104] usb 1-1: new full-speed USB device number 3 using ci_hdrc
[ 2.900105] usb 1-1: device no response, device descriptor read/64, error -71
[ 3.220056] usb 1-1: device no response, device descriptor read/64, error -71
[ 3.450162] usb 1-1: new full-speed USB device number 4 using ci_hdrc
[ 3.940167] usb 1-1: device not accepting address 4, error -71
[ 4.060198] usb 1-1: new full-speed USB device number 5 using ci_hdrc
[ 4.550057] usb 1-1: device not accepting address 5, error -71
[ 4.575765] hub 1-0:1.0: unable to enumerate USB device on port 1
在正常的开发板子上
root@freescale ~$ dmesg |grep -i usb
[ 0.177436] usbcore: registered new interface driver usbfs
[ 0.177627] usbcore: registered new interface driver hub
[ 0.177945] usbcore: registered new device driver usb
[ 1.252969] usbcore: registered new interface driver cdc_ether
[ 1.258969] usbcore: registered new interface driver cdc_eem
[ 1.265057] usbcore: registered new interface driver cdc_ncm
[ 1.270877] ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
[ 1.283343] usbcore: registered new interface driver usb-storage
[ 1.289818] usbcore: registered new interface driver usbserial
[ 1.295799] usbcore: registered new interface driver usbserial_generic
[ 1.302550] usbserial: USB Serial support registered for generic
[ 1.308707] usbcore: registered new interface driver ftdi_sio
[ 1.314665] usbserial: USB Serial support registered for FTDI USB Serial Device
[ 1.322170] usbcore: registered new interface driver option
[ 1.327882] usbserial: USB Serial support registered for GSM modem (1-port)
[ 1.335055] usbcore: registered new interface driver usb_ehset_test
[ 1.343720] 2184800.usbmisc supply vbus-wakeup not found, using dummy regulator
[ 1.359797] 2184200.usb supply vbus not found, using dummy regulator
[ 1.375059] ci_hdrc ci_hdrc.1: new USB bus registered, assigned bus number 1
[ 1.399676] ci_hdrc ci_hdrc.1: USB 2.0 started, EHCI 1.00
[ 1.407176] hub 1-0:1.0: USB hub found
[ 1.632485] usbcore: registered new interface driver bcm203x
[ 1.638475] usbcore: registered new interface driver btusb
[ 1.644326] usbcore: registered new interface driver ath3k
[ 1.729753] usb 1-1: new high-speed USB device number 2 using ci_hdrc
[ 1.892442] hub 1-1:1.0: USB hub found
[ 2.095014] usbcore: registered new interface driver usbhid
[ 2.100788] usbhid: USB HID core driver
[ 10.238796] usbcore: registered new interface driver rtl8723bu
[ 10.770230] usb 1-1.4: new high-speed USB device number 3 using ci_hdrc
再出错的板子上 打印
[ 2.109124] usbhid: USB HID core driver
[ 2.450128] usb 1-1: device no response, device descriptor read/64, error -71
[ 2.680104] usb 1-1: new full-speed USB device number 3 using ci_hdrc
[ 2.900105] usb 1-1: device no response, device descriptor read/64, error -71
[ 3.220056] usb 1-1: device no response, device descriptor read/64, error -71
[ 3.450162] usb 1-1: new full-speed USB device number 4 using ci_hdrc
[ 3.940167] usb 1-1: device not accepting address 4, error -71
[ 4.060198] usb 1-1: new full-speed USB device number 5 using ci_hdrc
[ 4.550057] usb 1-1: device not accepting address 5, error -71
[ 4.575765] hub 1-0:1.0: unable to enumerate USB device on port 1
[ 10.409801] usbcore: registered new interface driver rtl8723bu
记录到这
