pad 版 otg 接U盘 无法使用
用官网下载的固件--Firefly-RK3288_PAD_IPS5K0350FPC_Android4.4_201504222155，测试otg接U盘无法使用。接鼠标功能正常LOG如下：
shell@rk3288:/ $ [ 44.092560] Using Buffer DMA mode
[ 44.095880] Periodic Transfer Interrupt Enhancement - disabled
[ 44.101683] Multiprocessor Interrupt Enhancement - disabled
[ 44.107181] OTG VER PARAM: 0, OTG VER FLAG: 0
[ 44.111485] ^^^^^^^^^^^^^^^^^^Host Mode
[ 44.157986] Init: Power Port (0)
[ 44.542108] Indeed it is in host mode hprt0 = 00021501
[ 44.719130] usb 2-1: new high-speed USB device number 2 using usb20_otg
[ 44.764673] Indeed it is in host mode hprt0 = 00001101
[ 45.004462] usb 2-1: New USB device found, idVendor=0ed1, idProduct=6981
[ 45.011357] usb 2-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[ 45.018741] usb 2-1: Product: Miniking Device
[ 45.023115] usb 2-1: Manufacturer: aigo
[ 45.027094] usb 2-1: SerialNumber: EO1JIXHC
[ 45.034921] usb-storage 2-1:1.0: USB Mass Storage device detected
[ 45.042317] scsi0 : usb-storage 2-1:1.0
[ 46.031395] scsi 0:0:0:0: Direct-Access aigo Miniking 8.07 PQ: 0 ANSI: 2
[ 46.047165] sd 0:0:0:0: 7888896 512-byte logical blocks: (4.03 GB/3.76 GiB)
[ 46.048989] sd 0:0:0:0: Attached scsi generic sg0 type 0
[ 46.060306] sd 0:0:0:0: Write Protect is off
[ 46.065266] sd 0:0:0:0: No Caching mode page found
[ 46.070530] sd 0:0:0:0: Assuming drive cache: write through
[ 46.078552] sd 0:0:0:0: No Caching mode page found
[ 46.083785] sd 0:0:0:0: Assuming drive cache: write through
[ 46.629813]sda: sda1
[ 46.639786] sd 0:0:0:0: No Caching mode page found
[ 46.645106] sd 0:0:0:0: Assuming drive cache: write through
[ 46.651930] sd 0:0:0:0: Attached SCSI removable disk
[ 67.345351] healthd: battery l=50 v=3 t=2.6 h=2 st=3 chg=au
otg默认没有做挂载的动作，需要的话可以自己加上 zhansb 发表于 2015-8-27 11:07
otg默认没有做挂载的动作，需要的话可以自己加上
版主，求指点啊。 有两个host口不够用吗，为什么要用到otg口？要挂3个U盘? zhansb 发表于 2015-8-28 11:28
有两个host口不够用吗，为什么要用到otg口？要挂3个U盘?
如果加载otg ?需要用3个usbhost . 楼主解决了吗？
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