[meta-xilinx] zedboard usb issues

Wed Nov 26 20:55:11 PST 2014

Hi Simon,

Unfortunately the Zedboard does not connect the PHY reset pin to an MIO (unless you short R145, see the schematics for more details). You will need a bitstream that has the OTG-RESETN signal (pin G17) hooked upto a EMIO or a GPIO controller in PL. Sorry for confusion there, I did not even realize this myself until double checking.

Also, you can build u-boot-spl with meta-xilinx (not fsbl as of yet).

Regards,
Nathan

> -----Original Message-----
> From: Simon Vincent [mailto:simon.vincent at xsilon.com]
> Sent: Thursday, November 27, 2014 12:40 AM
> To: Nathan Rossi; Mike Looijmans; Philip Balister
> Cc: meta-xilinx at yoctoproject.org
> Subject: Re: [meta-xilinx] zedboard usb issues
> 
> Correction. I am still having problems with this.
> 
> If I build against nrossi/next branch and include a system.bit it works
> but if I don't include a system.bit it does not work and fails with the
> following error.
> zynq-dr e0002000.ps7-usb: Unable to init USB phy, missing?
> 
> Any idea why this is happening?
> 
> Is it possible to get yocto to build the fsbl?
> 
> Thanks
> 
> Simon
> 
> On 06/11/14 12:12, Simon Vincent wrote:
> > I did a build using the nrossi/next branch and I can confirm the USB
> > now works.
> > Many thanks
> >
> > Simon
> >
> > On 04/11/14 09:45, Nathan Rossi wrote:
> >>> -----Original Message-----
> >>> From: meta-xilinx-bounces at yoctoproject.org [mailto:meta-xilinx-
> >>> bounces at yoctoproject.org] On Behalf Of Mike Looijmans
> >>> Sent: Monday, November 03, 2014 4:48 PM
> >>> To: meta-xilinx at yoctoproject.org
> >>> Subject: Re: [meta-xilinx] zedboard usb issues
> >>>
> >>> On 10/31/2014 10:35 AM, Nathan Rossi wrote:
> >>> Met vriendelijke groet / kind regards,
> >>>
> >>> Mike Looijmans
> >>> System Expert
> >>>
> >>>
> >>> TOPIC Embedded Systems
> >>> Eindhovenseweg 32-C, NL-5683 KH Best
> >>> Postbus 440, NL-5680 AK Best
> >>> Telefoon: (+31) (0) 499 33 69 79
> >>> Telefax:  (+31) (0) 499 33 69 70
> >>> E-mail: mike.looijmans at topic.nl
> >>> Website: www.topic.nl
> >>>
> >>> Please consider the environment before printing this e-mail
> >>>
> >>> Topic zoekt gedreven (embedded) software specialisten!
> >>> http://topic.nl/vacatures/topic-zoekt-software-engineers/
> >>>
> >>> -----Original Message-----
> >>>>> From: meta-xilinx-bounces at yoctoproject.org [mailto:meta-xilinx-
> >>>>> bounces at yoctoproject.org] On Behalf Of Simon Vincent
> >>>>> Sent: Friday, October 31, 2014 12:48 AM
> >>>>> To: meta-xilinx at yoctoproject.org
> >>>>> Subject: [meta-xilinx] zedboard usb issues
> >>>>>
> >>>>> I have build a zedboard image using the latest xilinx-yocto but I am
> >>>>> having problems with the usb.
> >>>>>
> >>>>> I find that 50% of the time I get an error initialising the usb phy:
> >>>>> root at zedboard-zynq7:~# dmesg|grep -i usb
> >>>>> [    0.562406] usbcore: registered new interface driver usbfs
> >>>>> [    0.568243] usbcore: registered new interface driver hub
> >>>>> [    0.573986] usbcore: registered new device driver usb
> >>>>> [    1.314762] ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI)
> >>> Driver
> >>>>> [    1.329453] zynq-dr e0002000.ps7-usb: Unable to init USB phy,
> >>> missing?
> >>>>> [    1.336866] usbcore: registered new interface driver usb-storage
> >>>>> [    1.461775] usbcore: registered new interface driver usbhid
> >>>>> [    1.469402] usbhid: USB HID core driver
> >>>>>
> >>>>> The rest of the time I get the following but no usb devices are
> >>>>> recognised:
> >>>>>
> >>>>> root at zedboard-zynq7:~# dmesg|grep -i usb
> >>>>> [    0.562418] usbcore: registered new interface driver usbfs
> >>>>> [    0.568255] usbcore: registered new interface driver hub
> >>>>> [    0.573981] usbcore: registered new device driver usb
> >>>>> [    1.314193] ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI)
> >>> Driver
> >>>>> [    1.331922] Found TI TUSB1210 ULPI transceiver.
> >>>>> [    1.341299] zynq-ehci zynq-ehci.0: Xilinx Zynq USB EHCI Host
> >>> Controller
> >>>>> [    1.348773] zynq-ehci zynq-ehci.0: new USB bus registered,
> >>>>> assigned
> >>>>> bus number 1
> >>>>> [    1.405684] zynq-ehci zynq-ehci.0: USB 2.0 started, EHCI 1.00
> >>>>> [    1.418015] hub 1-0:1.0: USB hub found
> >>>>> [    1.429784] usbcore: registered new interface driver usb-storage
> >>>>> [    1.560122] usbcore: registered new interface driver usbhid
> >>>>> [    1.567687] usbhid: USB HID core driver
> >>>>>
> >>>>> If I boot using the sdcard image that came with the zedboard the USB
> >>>>> works every time and recognises usb devices.
> >>>>>
> >>>>> Has anyone else had problems with this?
> >>>> I have seen this before with other boards. It is caused when the
> >>>> USB PHY
> >>> is not reset properly. I don't see the issue in my testing most
> >>> likely due
> >>> to FSBL and or U-Boot resetting the phy.
> >>>
> >>> I have been using a patch for that for a while (the PHY reset in
> >>> FSBL only
> >>> worked for half the MIO pins). I was waiting for the VBUS patch to
> >>> make it
> >>> to
> >>> Xilinx master-next before submitting that to Xilinx. There's also
> >>> one in
> >>> the
> >>> ADI tree, but it uses much too loose timings for the reset pulse.
> >>>
> >>> You can see my code here, this solved the PHY reset on all boards:
> >>> https://github.com/topic-embedded-
> >>> products/linux/commit/7fb825c883e744c069a049ca4629c4664d2081af
> >> This is what I was referring to regarding the kernel being able to
> >> reset the PHY. But as it turns out the linux-xlnx kernel only had
> >> this in the xlnx_3.8 tree
> >> (https://github.com/Xilinx/linux-
> xlnx/commit/53e868300ad63c52137f47fd762a660071f1fd4e),
> >> and the patch was never merged with the newer branches.
> >>
> >> That patch looks good Mike, I have ported that change as a patch for
> >> the linux-xlnx_3.14 recipe. I have that on the nrossi/next branch,
> >> which I intend to merge by the end of the week.
> >>
> >> @Simon: I have also resolved that toolchain error you were getting
> >> with the newer meta-xilinx with dizzy.
> >>
> >> Regards,
> >> Nathan
> >>
> >>>
> >>>
> >>>> Linux is able to reset the PHY, and I have a patch on my nrossi/next
> >>> branch which should fix this issue you are seeing. Would you be able
> to
> >>> give it a try and let me know the outcome?, the branch is at:
> >>>> https://github.com/nathanrossi/meta-xilinx/compare/nrossi/next
> >>>
> >>> --
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> >