[U-Boot] USB power is not enabled fro BeagleBone Black

[U-Boot] USB power is not enabled fro BeagleBone Black

[sm]

Hi all,

The latest git version does not turn on USB power on BeagleBone Black:
"usb start" reports that the port is not accessible, but with external
power provided it detects the plugged in device.

Thanks for advises,
- Sergey





--
View this message in context: http://u-boot.10912.n7.nabble.com/USB-power-is-not-enabled-fro-BeagleBone-Black-tp297328.html
Sent from the U-Boot mailing list archive at Nabble.com.

[U-Boot] USB power is not enabled fro BeagleBone Black

[Tom Rini]

On Sat, Jul 01, 2017 at 12:51:41PM -0700, sm wrote:

> Hi all,
> 
> The latest git version does not turn on USB power on BeagleBone Black:
> "usb start" reports that the port is not accessible, but with external
> power provided it detects the plugged in device.

Yes, I think this may be intentional?

-- 
Tom
-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 819 bytes
Desc: Digital signature
URL: <http://lists.denx.de/pipermail/u-boot/attachments/20170707/001eb109/attachment.sig>

[U-Boot] USB power is not enabled fro BeagleBone Black

[Stephen Arnold]

Are we sure that's intentional?  One of the common use cases for black is
to plug in a usb keyboard/mouse and hdmi cable; what requirement is driving
this?  It would be great to have u-boot console support ala cubox/allwinner.

Just checking...

Steve

On Fri, Jul 7, 2017 at 7:41 AM, Tom Rini <trini@konsulko.com> wrote:

> On Sat, Jul 01, 2017 at 12:51:41PM -0700, sm wrote:
>
> > Hi all,
> >
> > The latest git version does not turn on USB power on BeagleBone Black:
> > "usb start" reports that the port is not accessible, but with external
> > power provided it detects the plugged in device.
>
> Yes, I think this may be intentional?
>
> --
> Tom
>
> _______________________________________________
> U-Boot mailing list
> U-Boot at lists.denx.de
> https://lists.denx.de/listinfo/u-boot
>
>

[U-Boot] USB power is not enabled fro BeagleBone Black

[Tom Rini]

On Fri, Jul 07, 2017 at 02:47:40PM -0700, Stephen Arnold wrote:

> Are we sure that's intentional?  One of the common use cases for black is
> to plug in a usb keyboard/mouse and hdmi cable; what requirement is driving
> this?  It would be great to have u-boot console support ala cubox/allwinner.

My thought was that we might not have enough power coming in?  But maybe
it's just more incidental fallout from the speed grade changes.  I'd be
happy to look at a patch that does bring things back.

> 
> Just checking...
> 
> Steve
> 
> On Fri, Jul 7, 2017 at 7:41 AM, Tom Rini <trini@konsulko.com> wrote:
> 
> > On Sat, Jul 01, 2017 at 12:51:41PM -0700, sm wrote:
> >
> > > Hi all,
> > >
> > > The latest git version does not turn on USB power on BeagleBone Black:
> > > "usb start" reports that the port is not accessible, but with external
> > > power provided it detects the plugged in device.
> >
> > Yes, I think this may be intentional?
> >
> > --
> > Tom
> >
> > _______________________________________________
> > U-Boot mailing list
> > U-Boot at lists.denx.de
> > https://lists.denx.de/listinfo/u-boot
> >
> >
> _______________________________________________
> U-Boot mailing list
> U-Boot at lists.denx.de
> https://lists.denx.de/listinfo/u-boot

-- 
Tom
-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 819 bytes
Desc: Digital signature
URL: <http://lists.denx.de/pipermail/u-boot/attachments/20170707/2a993e33/attachment.sig>

[U-Boot] USB power is not enabled fro BeagleBone Black

[Sergey Manucharian]

(sorry for top posting, sending from a phone)

I would agree it's intentional at the first stage: we don't want to power external devices which we may not need, however, the "usb start" command must enable it, otherwise it's useless...

-S.
  Original Message  
From: Tom Rini
Sent: Friday, July 7, 2017 18:41
To: sm; Lokesh Vutla
Cc: u-boot at lists.denx.de
Subject: Re: [U-Boot] USB power is not enabled fro BeagleBone Black

On Sat, Jul 01, 2017 at 12:51:41PM -0700, sm wrote:

> Hi all,
> 
> The latest git version does not turn on USB power on BeagleBone Black:
> "usb start" reports that the port is not accessible, but with external
> power provided it detects the plugged in device.

Yes, I think this may be intentional?

-- 
Tom

[U-Boot] USB power is not enabled fro BeagleBone Black

[Lokesh Vutla]

On 7/8/2017 8:50 AM, Sergey Manucharian wrote:
> (sorry for top posting, sending from a phone)
> 
> I would agree it's intentional at the first stage: we don't want to power external devices which we may not need, however, the "usb start" command must enable it, otherwise it's useless...

Right. Any chance you bisected to the commit which caused the issue?

Thanks and regards,
Lokesh

> 
> -S.
>   Original Message  
> From: Tom Rini
> Sent: Friday, July 7, 2017 18:41
> To: sm; Lokesh Vutla
> Cc: u-boot at lists.denx.de
> Subject: Re: [U-Boot] USB power is not enabled fro BeagleBone Black
> 
> On Sat, Jul 01, 2017 at 12:51:41PM -0700, sm wrote:
> 
>> Hi all,
>>
>> The latest git version does not turn on USB power on BeagleBone Black:
>> "usb start" reports that the port is not accessible, but with external
>> power provided it detects the plugged in device.
> 
> Yes, I think this may be intentional?
> 

[U-Boot] USB power is not enabled fro BeagleBone Black

[Sergey Manucharian]

New findings:

The problem is different, it happens only with USB 3 flash drives, USB 2
devices are powered properly. I don't have real statistics, but the
newest SanDisk's drives won't work.

However, it's hard to believe that a tiny USB drive requests more than
500mA to assume that the controller and/or u-boot decide to not provide
power to it.

Sergey

Excerpts from Lokesh Vutla's message from Mon 10-Jul-17 18:47:
> 
> 
> On 7/8/2017 8:50 AM, Sergey Manucharian wrote:
> > (sorry for top posting, sending from a phone)
> > 
> > I would agree it's intentional at the first stage: we don't want to power external devices which we may not need, however, the "usb start" command must enable it, otherwise it's useless...
> 
> Right. Any chance you bisected to the commit which caused the issue?
> 
> Thanks and regards,
> Lokesh
> 
> > 
> > -S.
> >   Original Message  
> > From: Tom Rini
> > Sent: Friday, July 7, 2017 18:41
> > To: sm; Lokesh Vutla
> > Cc: u-boot at lists.denx.de
> > Subject: Re: [U-Boot] USB power is not enabled fro BeagleBone Black
> > 
> > On Sat, Jul 01, 2017 at 12:51:41PM -0700, sm wrote:
> > 
> >> Hi all,
> >>
> >> The latest git version does not turn on USB power on BeagleBone Black:
> >> "usb start" reports that the port is not accessible, but with external
> >> power provided it detects the plugged in device.
> > 
> > Yes, I think this may be intentional?
> > 

[U-Boot] USB power is not enabled fro BeagleBone Black

[Aaron Williams]

One thing we have come across is that some USB drives require a longer delay 
between powering up and initialization.

I have historically also run into a lot of problems with both Sandisk USB 
devices and Sandisk SD cards, finding instances where they do not follow the 
standards.

-Aaron

On Thursday, July 27, 2017 1:42:02 PM PDT Sergey Manucharian wrote:
> New findings:
> 
> The problem is different, it happens only with USB 3 flash drives, USB 2
> devices are powered properly. I don't have real statistics, but the
> newest SanDisk's drives won't work.
> 
> However, it's hard to believe that a tiny USB drive requests more than
> 500mA to assume that the controller and/or u-boot decide to not provide
> power to it.
> 
> Sergey
> 
> Excerpts from Lokesh Vutla's message from Mon 10-Jul-17 18:47:
> > On 7/8/2017 8:50 AM, Sergey Manucharian wrote:
> > > (sorry for top posting, sending from a phone)
> > > 
> > > I would agree it's intentional at the first stage: we don't want to
> > > power external devices which we may not need, however, the "usb start"
> > > command must enable it, otherwise it's useless...> 
> > Right. Any chance you bisected to the commit which caused the issue?
> > 
> > Thanks and regards,
> > Lokesh
> > 
> > > -S.
> > > 
> > >   Original Message
> > > 
> > > From: Tom Rini
> > > Sent: Friday, July 7, 2017 18:41
> > > To: sm; Lokesh Vutla
> > > Cc: u-boot at lists.denx.de
> > > Subject: Re: [U-Boot] USB power is not enabled fro BeagleBone Black
> > > 
> > > On Sat, Jul 01, 2017 at 12:51:41PM -0700, sm wrote:
> > >> Hi all,
> > >> 
> > >> The latest git version does not turn on USB power on BeagleBone Black:
> > >> "usb start" reports that the port is not accessible, but with external
> > >> power provided it detects the plugged in device.
> > > 
> > > Yes, I think this may be intentional?
> 
> _______________________________________________
> U-Boot mailing list
> U-Boot at lists.denx.de
> https://lists.denx.de/listinfo/u-boot

-- 
Aaron Williams
Senior Software Engineer
Cavium, Inc.
(408) 943-7198	(510) 789-8988 (cell)