Messages in this thread | | | Date | Sat, 10 Jan 2009 21:28:20 +0100 | From | Thomas Dahlmann <> | Subject | Re: amd5536udc interrupts bug |
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Vadim Lobanov schrieb: > On Friday 09 January 2009 03:41:21 Thomas Dahlmann wrote: > >> Vadim Lobanov schrieb: >> >>> Alas, the hardware doesn't work. When I try plugging in the other end of >>> the USB cable, absolutely nothing happens. Not even an interrupt: >>> /proc/interrupts for the amd5536udc line stays at zero. Any thoughts on >>> possible ways to tackle this / what could be going wrong / etc? >>> > > Just realized that I forgot to mention that I do also have g_zero sitting on > top of amd5536udc, so there should at least be a dummy USB device to > enumerate. > > Right, g_zero should enumerate. It also provides data sink/source and loopback functionality. If you want to test data traffic then g_file_storage would be a good choice as it behaves as a mass storage device.
Example: dd bs=1M count=64 if=/dev/zero of=/tmp/image_file modrobe g_file_storage file=/tmp/image_file (create partition and file system from host side)
>> Is there any output in the kernel messages on the host side complaining >> about that device is >> not answering? If not than USB device port is probably not connected to >> UDC PHY. Please >> check in BIOS setup that port 4 is assigned to UDC. >> > > Nope, nothing at all shows up in the logs or the interrupt counts when the > cable is plugged, neither for the host drivers nor the device drivers. (The > quickest test I have is to hook the device up to itself - one A port and one B > port.) > > The BIOS is configured "correctly" if the manuals are to be trusted. Here are > the relevant settings > OHCI: Enabled > EHCI: Enabled > UDC: Enabled > UOC: Disabled > Overcurrent reporting: Disabled > Port 4 assignment: Device > UOC has to be enabled. This controller switches the UDC PHY to port 4 and owns the mentioned PAD_EN and APU bits. These bits live in the memory mapped register space of UOC. I use a company intern tools to look at memory spaces of PCI devices. Lets forget these bits so far as I am pretty sure that enabling UOC fixes the problem.
Thomas
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