Hi,
Please review the debug message below.

Seabios message if USB3 harddrive is plugged in USB3 port.
--------------------------------------------
SeaBIOS (version rel-1.7.5-0-ge51488c-dirty-20150824_081102-supersrv)
Found coreboot cbmem console @ affde000
Found mainboard AMD FP4
Relocating init from 0x000e6d99 to 0xaff54770 (size 42948)
Found CBFS header at 0xfffffc60
CPU Mhz=2101
Found 26 PCI devices (max PCI bus is 01)
Copying SMBIOS entry point from 0xaffa7000 to 0x000f1540
Copying ACPI RSDP from 0xaffb8000 to 0x000f1510
Copying MPTABLE from 0xaffdc000/affdc010 to 0x000f1340
Copying PIR from 0xaffdd000 to 0x000f1310
Using pmtimer, ioport 0x818
Scan for VGA option rom
Running option rom at c000:0003
Turning on vga text mode console
SeaBIOS (version rel-1.7.5-0-ge51488c-dirty-20150824_081102-supersrv)
/aff51000\ Start thread
|aff51000| XHCI init on dev 00:10.0: regs @ 0xf0b8a000, 8 ports, 32 slots, 32 byte contexts
|aff51000| XHCI    extcap 0x1 @ f0b8a500
|aff51000| XHCI    protocol USB  3.00, 4 ports (offset 1), def 0
|aff51000| XHCI    protocol USB  2.00, 4 ports (offset 5), def 18
|aff51000| XHCI    extcap 0xa @ f0b8a540
/aff50000\ Start thread
/aff4f000\ Start thread
|aff4f000| WARNING - Timeout at i8042_flush:71!
\aff4f000/ End thread
|aff51000| EHCI init on dev 00:12.0 (regs=0xf0b8d520)
/aff4f000\ Start thread
/aff4d000\ Start thread
Found 0 lpt ports
Found 1 serial ports
AHCI controller at 11.0, iobase f0b8d000, irq 0
AHCI: cap 0xf733ff01, ports_impl 0x3
/aff4c000\ Start thread
|aff4c000| AHCI/0: probing
|aff51000| EHCI init on dev 01:00.4 (regs=0xf0818020)
/aff4b000\ Start thread
/aff4a000\ Start thread
/aff49000\ Start thread
/aff47000\ Start thread
|aff47000| AHCI/1: probing
|aff47000| AHCI/1: link up
|aff4c000| AHCI/0: link down
|aff47000| AHCI/1: ... finished, status 0x51, ERROR 0x4
\aff4c000/ End thread
|aff47000| Searching bootorder for: /pci@i0cf8/*@11/drive@1/disk@0
\aff4a000/ End thread
\aff49000/ End thread
|aff47000| AHCI/1: registering: "AHCI/1: PLEXTOR PX-128M6G-2280 ATA-8 Hard-Disk (119 GiBytes)"
\aff47000/ End thread
\aff51000/ End thread
/aff4c000\ Start thread
/aff4a000\ Start thread
/aff49000\ Start thread
/aff48000\ Start thread
/aff47000\ Start thread
\aff47000/ End thread
/aff47000\ Start thread
\aff47000/ End thread
/aff47000\ Start thread
\aff47000/ End thread
/aff47000\ Start thread
\aff47000/ End thread
/aff47000\ Start thread
/aff46000\ Start thread
\aff46000/ End thread
/aff46000\ Start thread
\aff46000/ End thread
/aff46000\ Start thread
\aff46000/ End thread
|aff4a000| usb_hid_setup 0xaff51c50
|aff4b000| WARNING - Timeout at ehci_waittick:186!
|aff4a000| USB keyboard initialized
\aff4a000/ End thread
\aff4b000/ End thread
|aff47000| WARNING - Timeout at wait_bit:484!
\aff47000/ End thread
|aff50000| XHCI no devices found
\aff50000/ End thread
\aff4c000/ End thread
\aff48000/ End thread
\aff49000/ End thread
|aff4d000| Initialized USB HUB (1 ports used)
\aff4d000/ End thread
\aff4f000/ End thread
All threads complete.
Scan for option roms

Press F12 for boot menu.

Select boot device:

1. AHCI/1: PLEXTOR PX-128M6G-2280 ATA-8 Hard-Disk (119 GiBytes



Seabios message if USB3 hard drive is plugged in USB2 port.
------------------------------
SeaBIOS (version rel-1.7.5-0-ge51488c-dirty-20150824_081102-supersrv)
Found coreboot cbmem console @ affde000
Found mainboard AMD FP4
Relocating init from 0x000e6d99 to 0xaff54770 (size 42948)
Found CBFS header at 0xfffffc60
CPU Mhz=2100
Found 26 PCI devices (max PCI bus is 01)
Copying SMBIOS entry point from 0xaffa7000 to 0x000f1540
Copying ACPI RSDP from 0xaffb8000 to 0x000f1510
Copying MPTABLE from 0xaffdc000/affdc010 to 0x000f1340
Copying PIR from 0xaffdd000 to 0x000f1310
Using pmtimer, ioport 0x818
Scan for VGA option rom
Running option rom at c000:0003
Turning on vga text mode console
SeaBIOS (version rel-1.7.5-0-ge51488c-dirty-20150824_081102-supersrv)
/aff51000\ Start thread
|aff51000| XHCI init on dev 00:10.0: regs @ 0xf0b8a000, 8 ports, 32 slots, 32 byte contexts
|aff51000| XHCI    extcap 0x1 @ f0b8a500
|aff51000| XHCI    protocol USB  3.00, 4 ports (offset 1), def 0
|aff51000| XHCI    protocol USB  2.00, 4 ports (offset 5), def 18
|aff51000| XHCI    extcap 0xa @ f0b8a540
/aff50000\ Start thread
/aff4f000\ Start thread
|aff4f000| WARNING - Timeout at i8042_flush:71!
\aff4f000/ End thread
|aff51000| EHCI init on dev 00:12.0 (regs=0xf0b8d520)
/aff4f000\ Start thread
/aff4d000\ Start thread
Found 0 lpt ports
Found 1 serial ports
AHCI controller at 11.0, iobase f0b8d000, irq 0
AHCI: cap 0xf733ff01, ports_impl 0x3
/aff4c000\ Start thread
|aff4c000| AHCI/0: probing
|aff51000| EHCI init on dev 01:00.4 (regs=0xf0818020)
/aff4b000\ Start thread
/aff4a000\ Start thread
/aff49000\ Start thread
/aff47000\ Start thread
|aff47000| AHCI/1: probing
|aff47000| AHCI/1: link up
|aff4c000| AHCI/0: link down
|aff47000| AHCI/1: ... finished, status 0x51, ERROR 0x4
\aff4c000/ End thread
|aff47000| Searching bootorder for: /pci@i0cf8/*@11/drive@1/disk@0
\aff4a000/ End thread
\aff49000/ End thread
|aff47000| AHCI/1: registering: "AHCI/1: PLEXTOR PX-128M6G-2280 ATA-8 Hard-Disk (119 GiBytes)"
\aff47000/ End thread
\aff51000/ End thread
/aff4c000\ Start thread
/aff4a000\ Start thread
/aff49000\ Start thread
/aff48000\ Start thread
/aff47000\ Start thread
\aff47000/ End thread
/aff47000\ Start thread
\aff47000/ End thread
/aff47000\ Start thread
\aff47000/ End thread
/aff47000\ Start thread
\aff47000/ End thread
/aff47000\ Start thread
\aff47000/ End thread
/aff47000\ Start thread
\aff47000/ End thread
/aff47000\ Start thread
\aff47000/ End thread
/aff47000\ Start thread
\aff47000/ End thread
|aff50000| XHCI no devices found
\aff50000/ End thread
|aff4b000| WARNING - Timeout at ehci_waittick:186!
\aff4b000/ End thread
|aff4c000| Searching bootorder for: /pci@i0cf8/usb@12/hub@1/storage@1/*@0/*@0,0
|aff4c000| Searching bootorder for: /pci@i0cf8/usb@12/hub@1/usb-*@1
|aff4c000| USB MSC vendor='Seagate' product='FA GoFlex Pro' rev='0210' type=0 removable=0
|aff4c000| USB MSC blksize=512 sectors=976773167
\aff4c000/ End thread
|aff4a000| usb_hid_setup 0xaff521d0
|aff4a000| USB keyboard initialized
\aff4a000/ End thread
\aff48000/ End thread
\aff49000/ End thread
|aff4d000| Initialized USB HUB (2 ports used)
\aff4d000/ End thread
\aff4f000/ End thread
All threads complete.
Scan for option roms

Press F12 for boot menu.

Select boot device:

1. AHCI/1: PLEXTOR PX-128M6G-2280 ATA-8 Hard-Disk (119 GiBytes
2. USB MSC Drive Seagate FA GoFlex Pro 0210


> Date: Thu, 20 Aug 2015 13:14:54 +0200
> From: vidwer@gmail.com
> To: seabios@seabios.org
> Subject: Re: [SeaBIOS] : USB 3.0 port failed if a USB 3.0 device is attached when power up
>
> 2015-08-07 23:21 GMT+02:00 Kevin O'Connor <kevin@koconnor.net>:
> > On Thu, Aug 06, 2015 at 11:51:04AM +0000, Zheng Bao wrote:
> >> Board: Bettong
> >> USB3 controller: Hudson on Carrizo
> >> USB3 device: Seagate USB hard drive. That is the only USB 3.0 device I can get.
> >
> > Thanks. The problem looks very similar to one reported in the past by
> > Idwer. Unfortunately, Idwer also didn't have access to any other USB3
> > devices - that would have been a great test to see if the quirky
> > behavior was due to the controller or due to the device.
>
> The board I have is an Hudson-D4? board, ASUS F2A85-M with the lspci ID:
> 00:10.0 USB controller [0c03]: Advanced Micro Devices, Inc. [AMD] FCH
> USB XHCI Controller [1022:7812] (rev 03)
> 00:10.1 USB controller [0c03]: Advanced Micro Devices, Inc. [AMD] FCH
> USB XHCI Controller [1022:7812] (rev 03)
>
> Zheng, can you recompile SeaBIOS with CONFIG_THREADS=y and
> CONFIG_DEBUG_LEVEL=2 and try booting off the superspeed device you're
> using?
> The experience I had was that, with those settings, this superspeed
> SATA dock showed up in the device menu (press ESCape).
>
> If that won't make the device show up - be sure to post that
> cbmem/console output - change USB_TIME_SIGATT in src/hw/usb.h to at
> least 1000.
>
> HTH,
>
> Idwer
>
> >
> > Can you provide the output from "lspci", "lsusb", and "lsusb -t".
> >
> > -Kevin
> >
> >>
> >> Joe
> >>
> >> > Date: Wed, 5 Aug 2015 06:25:13 -0400
> >> > From: kevin@koconnor.net
> >> > To: fishbaoz@hotmail.com
> >> > CC: seabios@seabios.org
> >> > Subject: Re: [SeaBIOS]: USB 3.0 port failed if a USB 3.0 device is attached when power up
> >> >
> >> > On Wed, Aug 05, 2015 at 07:40:50AM +0000, Zheng Bao wrote:
> >> > > hi, Kevin,
> >> > > I am debugging the coreboot on AMD board.
> >> > >
> >> > > I found if a device is populated on USB 3.0 port during system power up, the USB3.0 function fail after OS boot up.
> >> > > If a USB 2.0 device is plugged, the port is OK.
> >> > > Can you take a look at this?
> >> >
> >> > What board is this, what USB3 controller is it, and what USB3 device
> >> > did the problem occur with? Does the problem occur with multiple/all
> >> > USB3 devices or just one?
> >> >
> >> > -Kevin
> >>
>
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