From mboxrd@z Thu Jan 1 00:00:00 1970 From: Alexey.Brodkin@synopsys.com (Alexey Brodkin) Date: Wed, 6 Jul 2016 08:45:50 +0000 Subject: ath9k-htc on OHCI -> bogus usb xfer In-Reply-To: <577CC3A2.5070607@de.bosch.com> References: <1467721137.3144.81.camel@synopsys.com> <577BED2D.7070209@rempel-privat.de> <1467739821.3086.13.camel@synopsys.com> <577C041C.7080905@rempel-privat.de> <1467790987.3086.15.camel@synopsys.com> <577CC035.1000404@de.bosch.com> <1467793848.3086.37.camel@synopsys.com> <577CC3A2.5070607@de.bosch.com> List-ID: Message-ID: <1467794679.3086.42.camel@synopsys.com> To: linux-snps-arc@lists.infradead.org Hi?Oleksij, On Wed, 2016-07-06@10:38 +0200, fixed-term.Oleksij.Rempel wrote: > > On 06.07.2016 10:32, Alexey Brodkin wrote: > > > > Hi Oleksij, > > > > On Wed, 2016-07-06@10:24 +0200, fixed-term.Oleksij.Rempel wrote: > > > > > > ? > > > Hm... this Endpoint should be Interrupt, not Bulk. If you search for > > > lsusb of this kind of adapter all of them list EP3 and EP4 as Interrupt. > > > > > > what did went wrong here? Is it not working in USB High Speed mode? > > Unfortunately as of now on that board EHCI doesn't work. > > > > That's not a problem of a particular USB device but something in either > > ECHI host controller or its integration. I do hope we will fix it sometime soon > > (this is a development board and USB controller is implemented in FPGA so > > there's a chance to fix stuff later on). > > > > So given only OHCI works on the board I went forward and attempted to use it > > with Wi-Fi USB dongle. > > I did some tests for 2 years on OHCI controller on x86. There was no > noticable issues. It was even a bit faster then Intels EHCI. I don't > think OHCI alone is the source of this problem. Well I was also surprised how well that dongle works with that board in OHCI mode. I saw quite consistent ~4-5 Mbit/second rates when doing Speedtest from my smartphone. So IMHO it's completely usable. Especially on that kind of HW which has main CPU running at just 100MHz. > On other side, so far i know, this adapter claims to provide usb full > speed support, (Not only high speed) and may use different usb > descriptor for this. May be this is the problem. So is there something we may do with all that? -Alexey