On Wednesday, December 16, 2015 at 08:54:11 PM, Alexey Brodkin wrote:
Hi Marek,
Hi!
On Wed, 2015-12-16 at 17:52 +0100, Marek Vasut wrote:
On Wednesday, December 16, 2015 at 05:05:15 PM, Alexey Brodkin wrote:
This commit adds support of USB 1.1 storage media on AXS103 board. For some yet unknown reason USB 2.0 doesn't work on AXS103 board issuing messages like this: ------------------------>8------------------- AXS# usb start starting USB... USB0: USB EHCI 1.00 scanning bus 0 for devices... EHCI timed out on TD - token=0x80008c80 unable to get device descriptor (error=-1) 1 USB Device(s) found ------------------------>8-------------------
Try defining CONFIG_EHCI_IS_TDI , that _might_ help.
Thanks for that tip but it made no difference to me. I need to look deeper into that problem.
I remember seeing that stuff multiple times before, but it might be a different issue. It was usually triggered by some sort of corruption during the transfer. On ARM, that was often caused by cache issues.
Just a bit of a context here. I'm playing with ARC SP board which consists of 2 parts: [1] Baseboard with all peripherals and their connectors [2] Daughterboard with CPU and DDR
Baseboard is connected to CPU-board via AXI tunnel.
And when CPU-board is the one with ASIC based on ARC770 that runs at 700 MHz I see USB 2.0 working perfectly fine.
But if I use CPU-board that sports FPGA with ARC HS38 CPU running at 75 MHz I see the first asynchronous tarnsaction on US 2.0 never happens.
Connect signaltap or chipscope ? :)
In particular in ehci_submit_async() after we enable async. schedule setting CMD_ASE command STS_ASS gets set but then token's status stays active forever i.e. following is always true: --------------------->8--------------------- QT_TOKEN_GET_STATUS(token) & QT_TOKEN_STATUS_ACTIVE --------------------->8---------------------
Note USB host controller, phy and usb dongle are exactly the same. And USB 1.1 (OHCI) works perfectly fine at the same time.
Try adding #define DEBUG at the first line of common/usb.c , so we can get some more debugging info. Also adding the same into common/usb_hub.c helps.
Any ideas what could be wrong?
-Alexey
Best regards, Marek Vasut