Date: Wed, 11 Aug 2010 12:29:41 +0200 From: Hans Petter Selasky <hselasky@c2i.net> To: Rafal Jaworowski <raj@semihalf.com> Cc: freebsd-arm@freebsd.org, freebsd-current@freebsd.org, freebsd-usb@freebsd.org Subject: Re: [BETA testing] USB 3.0 Super Speed support in FreeBSD Message-ID: <201008111229.41469.hselasky@c2i.net> In-Reply-To: <114332B9-A38B-471A-B4FE-F6E210F58233@semihalf.com> References: <201008072144.00002.hselasky@c2i.net> <114332B9-A38B-471A-B4FE-F6E210F58233@semihalf.com>
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On Wednesday 11 August 2010 12:17:28 Rafal Jaworowski wrote: > On 2010-08-07, at 21:43, Hans Petter Selasky wrote: > > During the last two weeks I've been working hard to get USB 3.0 support > > added to the FreeBSD 8+ USB stack. There are a couple of issues left, > > but right now the code is in a state were enumeration of USB devices is > > possible and there are no dirty hacks :-) > > > > The XHCI chip, which is the PCI interface for USB 3.0, is a replacement > > for OHCI/UHCI/EHCI and can also drive USB Super Speed (4.8 Gbps). I > > expect there to be a througput and performance increase when switching > > over to the XHCI interface also for 2.0 compatible devices, because it > > has a better data queuing mechanism. > > Nice work! What exactly is the USB3 controller chip you're working with? > Hi, It is this one: http://www.intel.com/technology/usb/download/xHCI_Specification_for_USB.pdf I currently have a PCI express card from some vendor, which implements support for the XHCI spec. and I've seen good results so far. I would very much like to test the XHCI driver on ARM, if any chips exist yet which has the XHCI included in the ASIC. --HPS
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