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Linux/AM3352: The problem what USB 3.0 port recognized by Linux as 2.0

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Part Number:AM3352

Tool/software: Linux

Hi~!

I have traveld for the recognition of the USB3.0 storage.

USB 2.0 is working fine, but USB3.0 storage do not work well.

So I 've checked lsusb in linux command window.

[usb 3.0 storage lsusb]

lsusb 
Bus 001 Device 001: ID 1d6b:0002
Bus 002 Device 001: ID 1d6b:0001
Bus 001 Device 002: ID 0424:3503
Bus 001 Device 004: ID 8564:1000

[usb 2.0 storage lsusb]

Bus 001 Device 001: ID 1d6b:0002
Bus 002 Device 001: ID 1d6b:0001
Bus 001 Device 002: ID 0424:3503
Bus 001 Device 005: ID 090c:1000

The below is kernel log when USB3.0Storage connected the AM335x Board.

[ 55.000210] usb 1-2.1:
[ 55.000215] new high speed USB device number 3 using s5p-ehci test!!!
[ 55.000220]
[ 55.111186] usb 1-2.1: New USB device found, idVendor=8564, idProduct=1000
[ 55.112418] usb 1-2.1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[ 55.119712] usb 1-2.1: Product: Mass Storage Device
[ 55.124573] usb 1-2.1: Manufacturer: JetFlash
[ 55.128911] usb 1-2.1: SerialNumber: 783117416
[ 55.134850] scsi0 : usb-storage 1-2.1:1.0
[ 56.136195] scsi 0:0:0:0: Direct-Access JetFlash Transcend 8GB 1.00 PQ: 0 ANSI: 6
[ 56.140652] sd 0:0:0:0: Attached scsi generic sg0 type 0
[ 56.140897] sd 0:0:0:0: [sda] 15433728 512-byte logical blocks: (7.90 GB/7.35 GiB)
[ 56.141377] sd 0:0:0:0: [sda] Write Protect is off
[ 56.141876] sd 0:0:0:0: [sda] Write cache: disabled, read cache: disabled, doesn't support DPO or FUA
[ 56.141890] sd 0:0:0:0: [sda] [sd_read_cache_type:2176] test
[ 56.147257] sd 0:0:0:0: [sda] [sd_read_cache_type:2176] test
[ 56.148240] sda:
[ 56.160418] sd 0:0:0:0: [sda] [sd_read_cache_type:2176] test
[ 56.160435] sd 0:0:0:0: [sda] Attached SCSI removable disk

I know AM335x spec shows only USB2.0.

But I guess USB3.0 storage also might be work  as USB 2.0 speed.

Would you tell me how can I fix it on the AM335x Linux Board?

Now, when I try to connect an external USB 3.0 HDD  (a Lacie rugged 1TB if that matters), with a USB 3.0 cable to a USB 3.0 port, it get's recognized with the lsusb command. But I am unable to mount it and it also doesn't show up


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