Date: Fri, 11 Sep 2015 10:44:22 -0400 From: "Chad J. Milios" <milios@ccsys.com> To: Shane Ambler <FreeBSD@ShaneWare.Biz> Cc: Ernie Luzar <luzar722@gmail.com>, "freebsd-questions@freebsd.org" <freebsd-questions@freebsd.org> Subject: Re: USB physical ports Message-ID: <BCE7CC60-B15B-4FFA-AD19-96C8BA9424BD@ccsys.com> In-Reply-To: <55F2A2B2.4090801@ShaneWare.Biz> References: <55F1A507.70402@gmail.com> <2091716.bhpPQfPjgk@amd.asgard.uk> <55F216CB.6040606@gmail.com> <55F2A2B2.4090801@ShaneWare.Biz>
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> On Sep 11, 2015, at 5:45 AM, Shane Ambler <FreeBSD@ShaneWare.Biz> wrote: >=20 >> On 11/09/2015 09:18, Ernie Luzar wrote: >> Dave wrote: >>>> On Thursday 10 September 2015 11:43:03 Ernie Luzar wrote: >>>> Hello List; >>>>=20 >>>> I have 6 physical ports on my PC box. The boot time messages seem to >>>> say that one of those ports is 480Mbps High Speed USB v2.0. >>>>=20 >>>> How do I determine which physical USB port is the 480Mbps High Speed >>>> port? >=20 > I think inserting a device is the only way to identify which port it is > inserted into, use usbconfig to see what is connected at what speed. Yeah unfortunately there is little rhyme or reason between device tree the k= ernel enumerates as seen in dmesg output and physical ports on front/back/si= des/inside computer. Some of the things FreeBSD sees may not be USB ports/hu= bs/devices at all, in the typical sense, and instead are certain features of= your motherboard that just happen to be connected by USB at an electric and= /or protocol level. And some of the real physical ports actually get shared b= y USB "hubs" built into the motherboard physically or simulated by mixtures o= f firmware and other types of bridges and busses. Test what you need to test in order to be sure your system will run how you r= eally intend. 480 Mbps or 5 Gbps on each port one at a time may work great b= ut then down the road you discover you can only do a total of x bps to ports= a thru b while simultaneously doing y bps thru ports c thru d and the combi= nations are endless. Many desktop/server mobos have numerous extra USB conne= ctors on the mobo, minus the actual ports, (for ten cent adapters added once= you need them or tiny devices meant for those internal connectors). Good mobos from good manufacturers should have block diagrams you can trust b= ut matching them up to actual kernel probes is not an exact or consistent sc= ience from product SKU to product SKU and you'd be darn lucky when the manuf= acturer doesn't mix it up between different batches of the same SKU.=
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