Can you use a USB3.0 hub?
Kohji Okuno
okuno.kohji at jp.panasonic.com
Fri Jan 13 02:41:00 UTC 2012
Hi HPS,
From: Hans Petter Selasky <hselasky at c2i.net>
Subject: Re: Can you use a USB3.0 hub?
Date: Thu, 12 Jan 2012 22:23:22 +0100
> On Thursday 12 January 2012 07:15:17 Kohji Okuno wrote:
>> Hi,
>>
>> Can you use a USB3.0 hub?
>>
>> I tried a USB3.0 hub (BUFFALO BSH4A04U3BK).
>> And I used 8-stable and PCI-E card (BUFFALO IFC-PCIE2U3)
>>
>> The hub is for only japanese market.
>> The card is NEC’s 720200 chip
>> http://www.buffalotech.com/products/accessories/interface-card-adapters/usb
>> -30-pci-express-interface-card/
>>
>>
>> The kernel could not recognize USB3.0 HDD that connected to this hub
>> as the following log. But, the kernel could reconize USB2.0 HDD that
>> connected to this hub.
>>
>> Regards,
>> Kohji Okuno
>
> Hi,
>
> There is a problem with USB 3.0 HUBs, most likely something related to the
> XHCI route string or USB HUB set depth.
>
> I don't have a USB 3.0 analyzer, so I cannot find this out quickly. If you
> could help debug, would be great. Here is a patch which you can put on top of
> 8/9- or 10- stable:
>
> http://svn.freebsd.org/changeset/base/230032
>
> It fixes a few issues, but not all.
I think your commit is wrong about UPS_PORT_POWER_SS.
- #define UPS_PORT_POWER_SS 0x0200 /* super-speed only */
#define UPS_LOW_SPEED 0x0200
+ #define UPS_PORT_POWER_SS 0x2000 /* super-speed only */
#define UPS_LOW_SPEED 0x0200
Now, usb3.0 HDD was not able to recognize.
I have USB 3.0 analyzer(LeCroy Voyager), so I can help debug.
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