[U-Boot] [PATCH] axs103: add support of generic OHCI USB 1.1 controller

[Alexey Brodkin <Alexey.Brodkin@synopsys.com>]

Hi Marek,

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.

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. 

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.

Any ideas what could be wrong?

-Alexey