USB confusion

USB confusion

[Gary Thomas]

What are the options to have USB Host support on the "normal"
USB channels (i.e. not the OTG port)?

This used to work on my platform but things stopped when I
upgraded to the latest kernel :-(

n.b. OTG host and gadget still work fine.

Thanks

-- 
------------------------------------------------------------
Gary Thomas                 |  Consulting for the
MLB Associates              |    Embedded world
------------------------------------------------------------

Re: USB confusion

[Gary Thomas]

On 09/01/2009 05:42 AM, Gary Thomas wrote:
> What are the options to have USB Host support on the "normal"
> USB channels (i.e. not the OTG port)?
>
> This used to work on my platform but things stopped when I
> upgraded to the latest kernel :-(
>
> n.b. OTG host and gadget still work fine.
>
> Thanks
>

Following up on this, I made sure that CONFIG_USB_EHCI_HCD was defined.

Now I see these messages:
   ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
   Clock usbhost_48m_fck didn't enable in 100000 tries
   ehci-omap: probe of ehci-omap.0 failed with error -22

Any ideas what else I might be missing?

-- 
------------------------------------------------------------
Gary Thomas                 |  Consulting for the
MLB Associates              |    Embedded world
------------------------------------------------------------

Re: USB confusion

[Felipe Balbi]

On Tue, Sep 01, 2009 at 02:20:13PM +0200, ext Gary Thomas wrote:
> Following up on this, I made sure that CONFIG_USB_EHCI_HCD was defined.
> 
> Now I see these messages:
>    ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
>    Clock usbhost_48m_fck didn't enable in 100000 tries
>    ehci-omap: probe of ehci-omap.0 failed with error -22
> 
> Any ideas what else I might be missing?

check what happens with that clock. Why is that timing out ?

I believe that message comes from clk fw. Maybe Paul could
give us some hint. Paul ?

-- 
balbi

RE: USB confusion

[Gupta, Ajay Kumar]

> -----Original Message-----
> From: linux-omap-owner@vger.kernel.org [mailto:linux-omap-
> owner@vger.kernel.org] On Behalf Of Felipe Balbi
> Sent: Tuesday, September 01, 2009 9:58 PM
> To: ext Gary Thomas
> Cc: linux-omap@vger.kernel.org; Paul Walmsley
> Subject: Re: USB confusion
> 
> On Tue, Sep 01, 2009 at 02:20:13PM +0200, ext Gary Thomas wrote:
> > Following up on this, I made sure that CONFIG_USB_EHCI_HCD was defined.
> >
> > Now I see these messages:
> >    ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
> >    Clock usbhost_48m_fck didn't enable in 100000 tries
> >    ehci-omap: probe of ehci-omap.0 failed with error -22
> >
> > Any ideas what else I might be missing?
> 
> check what happens with that clock. Why is that timing out ?
> 
> I believe that message comes from clk fw. Maybe Paul could
> give us some hint. Paul ?

I faced similar issue and it got solved with increased timeout value.
Patch is already submitted for this:

[PATCH 5/9] ehci: increase timeout to fix ehci failure
http://marc.info/?l=linux-omap&m=124956053919660&w=2

-Ajay
> 
> --
> balbi
> --
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Re: USB confusion

[Steve Sakoman]

On Tue, Sep 1, 2009 at 4:42 AM, Gary Thomas<gary@mlbassoc.com> wrote:
> What are the options to have USB Host support on the "normal"
> USB channels (i.e. not the OTG port)?
>
> This used to work on my platform but things stopped when I
> upgraded to the latest kernel :-(

I had the same experience with Overo and posted a patch a couple of
weeks ago to get it working (ARM: OMAP3: Overo: Fix EHCI
initialization)

Beagle EHCI is also broken on top of tree and requires a couple of
changes in the board file.  I'll try to submit that patch in the next
day or so.

Steve

Re: USB confusion

[Gary Thomas]

On 09/01/2009 12:14 PM, Steve Sakoman wrote:
> On Tue, Sep 1, 2009 at 4:42 AM, Gary Thomas<gary@mlbassoc.com>  wrote:
>> What are the options to have USB Host support on the "normal"
>> USB channels (i.e. not the OTG port)?
>>
>> This used to work on my platform but things stopped when I
>> upgraded to the latest kernel :-(
>
> I had the same experience with Overo and posted a patch a couple of
> weeks ago to get it working (ARM: OMAP3: Overo: Fix EHCI
> initialization)

That fixed it (more precisely, the indirectly referenced patch
'fix phy_reset' fixed my problem)

Thanks

-- 
------------------------------------------------------------
Gary Thomas                 |  Consulting for the
MLB Associates              |    Embedded world
------------------------------------------------------------