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

Wed Dec 23 12:59:28 CET 2015

Hi Marek,

On Mon, 2015-12-21 at 23:18 +0100, Marek Vasut wrote:
> On Monday, December 21, 2015 at 09:34:08 PM, Alexey Brodkin wrote:
> > Hi,
> > 
> > On Thu, 2015-12-17 at 16:08 +0100, Marek Vasut wrote:
> > > On Thursday, December 17, 2015 at 02:32:26 PM, Alexey Brodkin wrote:
> > > > Hi Marek,
> > > > 
> > > > On Thu, 2015-12-17 at 05:01 +0100, Marek Vasut wrote:
> > > > > 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.
> > > > 
> > > > Believe me I know how much of a grief caches bring so the first thing I
> > > > do when seeing unexpected behavior I disable caches :)
> > > > 
> > > > > > 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 ? :)
> > > > 
> > > > Well I don't have either of those tools sitting on my desk but
> > > > if absolutely required I'll do that :)
> > > > 
> > > > > > 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.
> > > > 
> > > > Did that and here's my log:
> > > > 
> > > > --------------------->8---------------------
> > > > starting USB...
> > > > USB0:   ehci_register: dev='ehci at 0xe0040000', ctrl=9fd94100,
> > > > hccr=e0040000, hcor=e0040010, init=0 Register 1111 NbrPorts 1
> > > > USB EHCI 1.00
> > > > scanning bus 0 for devices... ehci_submit_control_msg:
> > > > dev='ehci at 0xe0040000', udev=9fd7c000, udev->dev='ehci at 0xe004000 req=6
> > > > (0x6), type=128 (0x80), value=256, index=0
> > > > USB_DT_DEVICE request
> > > > ehci_submit_control_msg: dev='ehci at 0xe0040000', udev=9fd7c000,
> > > > udev->dev='ehci at 0xe0040000', portnr=0 req=5 (0x5), type=0 (0x0),
> > > > value=1, index=0
> > > > USB_REQ_SET_ADDRESS
> > > > Len is 0
> > > > ehci_submit_control_msg: dev='ehci at 0xe0040000', udev=9fd7c000,
> > > > udev->dev='ehci at 0xe0040000', portnr=0 req=6 (0x6), type=128 (0x80),
> > > > value=256, index=0
> > > > USB_DT_DEVICE request
> > > > ehci_submit_control_msg: dev='ehci at 0xe0040000', udev=9fd7c000,
> > > > udev->dev='ehci at 0xe0040000', portnr=0 req=6 (0x6), type=128 (0x80),
> > > > value=512, index=0
> > > > USB_DT_CONFIG config
> > > > ehci_submit_control_msg: dev='ehci at 0xe0040000', udev=9fd7c000,
> > > > udev->dev='ehci at 0xe0040000', portnr=0 req=6 (0x6), type=128 (0x80),
> > > > value=512, index=0
> > > > USB_DT_CONFIG config
> > > > ehci_submit_control_msg: dev='ehci at 0xe0040000', udev=9fd7c000,
> > > > udev->dev='ehci at 0xe0040000', portnr=0 req=9 (0x9), type=0 (0x0),
> > > > value=1, index=0
> > > > USB_REQ_SET_CONFIGURATION
> > > > Len is 0
> > > > ehci_submit_control_msg: dev='ehci at 0xe0040000', udev=9fd7c000,
> > > > udev->dev='ehci at 0xe0040000', portnr=0 req=6 (0x6), type=128 (0x80),
> > > > value=768, index=0
> > > > USB_DT_STRING config
> > > > ehci_submit_control_msg: dev='ehci at 0xe0040000', udev=9fd7c000,
> > > > udev->dev='ehci at 0xe0040000', portnr=0 req=6 (0x6), type=128 (0x80),
> > > > value=769, index=1
> > > > USB_DT_STRING config
> > > > ehci_submit_control_msg: dev='ehci at 0xe0040000', udev=9fd7c000,
> > > > udev->dev='ehci at 0xe0040000', portnr=0 req=6 (0x6), type=128 (0x80),
> > > > value=770, index=1
> > > > USB_DT_STRING config
> > > > ehci_submit_control_msg: dev='ehci at 0xe0040000', udev=9fd94380,
> > > > udev->dev='usb_hub', portnr=0 req=6 (0x6), type=160 (0xa0),
> > > > value=10496, index=0
> > > > USB_DT_HUB config
> > > > ehci_submit_control_msg: dev='ehci at 0xe0040000', udev=9fd94380,
> > > > udev->dev='usb_hub', portnr=0 req=6 (0x6), type=160 (0xa0),
> > > > value=10496, index=0
> > > > USB_DT_HUB config
> > > > ehci_submit_control_msg: dev='ehci at 0xe0040000', udev=9fd94380,
> > > > udev->dev='usb_hub', portnr=0 req=0 (0x0), type=160 (0xa0), value=0,
> > > > index=0
> > > > ehci_submit_control_msg: dev='ehci at 0xe0040000', udev=9fd94380,
> > > > udev->dev='usb_hub', portnr=0 req=3 (0x3), type=35 (0x23), value=8,
> > > > index=1
> > > > Len is 0
> > > > ehci_submit_control_msg: dev='ehci at 0xe0040000', udev=9fd94380,
> > > > udev->dev='usb_hub', portnr=0 req=0 (0x0), type=163 (0xa3), value=0,
> > > > index=1
> > > > ehci_submit_control_msg: dev='ehci at 0xe0040000', udev=9fd94380,
> > > > udev->dev='usb_hub', portnr=0 req=0 (0x0), type=163 (0xa3), value=0,
> > > > index=1
> > > > ehci_submit_control_msg: dev='ehci at 0xe0040000', udev=9fd94380,
> > > > udev->dev='usb_hub', portnr=0 req=1 (0x1), type=35 (0x23), value=16,
> > > > index=1
> > > > Len is 0
> > > > ehci_submit_control_msg: dev='ehci at 0xe0040000', udev=9fd94380,
> > > > udev->dev='usb_hub', portnr=0 req=3 (0x3), type=35 (0x23), value=4,
> > > > index=1
> > > > Len is 0
> > > > ehci_submit_control_msg: dev='ehci at 0xe0040000', udev=9fd94380,
> > > > udev->dev='usb_hub', portnr=0 req=0 (0x0), type=163 (0xa3), value=0,
> > > > index=1
> > > > ehci_submit_control_msg: dev='ehci at 0xe0040000', udev=9fd94380,
> > > > udev->dev='usb_hub', portnr=0 req=1 (0x1), type=35 (0x23), value=20,
> > > > index=1
> > > > Len is 0
> > > > ehci_submit_control_msg: dev='ehci at 0xe0040000', udev=9fd7b100,
> > > > udev->dev='usb_hub', portnr=1 dev=9fd7b100, pipe=80000083,
> > > > buffer=9fd7ae00, length=64, req=9fd7ad00 req=6 (0x6), type=128 (0x80),
> > > > value=256 (0x100), index=0
> > > > EHCI timed out on TD - token=0x80008c80
> > > > dev=0, usbsts=0x1, p[1]=0x1005, p[2]=0x0
> > > > unable to get device descriptor (error=-1)
> > > > ehci_submit_control_msg: dev='ehci at 0xe0040000', udev=9fd94380,
> > > > udev->dev='usb_hub', portnr=0 req=1 (0x1), type=35 (0x23), value=1,
> > > > index=1
> > > > Len is 0
> > > > 1 USB Device(s) found
> > > > AXS#
> > > > --------------------->8---------------------
> > > > 
> > > > Makes any sense?
> > > 
> > > Am I reading it correctly that the root hub (the one built into the
> > > controller) is misbehaving here ?
> > > 
> > > > Note in case of ARC770 the log is very similar except the fact that it
> > > > goes further to successful device detection.
> > 
> > Applied to u-boot-arc, thanks!
> 
> Uh, sorry I didn't get back to you about this. I am wrestling my own issues with
> the DWC2 USB core :-/ Looks like it doesn't work with USB3340 LPM-capable PHY 
> (it only starts in FS mode), but works with non-LPM-capable USB3300 PHY and 
> starts in HS mode.
> 
> Did you figure your issue out by any chance ?

No unfortunately I wasn't able to figure out what's wrong there.
For now I parked this activity waiting for response from our hardware guys.
I spent way too much time on that and basically need to switch to other
high-priority things.

If I ever get that problem resolved I'll let you know.

And thanks for your time anyway, that's much appreciated!

-Alexey