On Thu, 28 Mar 2013, David Linares wrote:
> Ok so here is what I did:
> - compiled all USB stuff as modules
> - boot up the device with nothing plugged in
> - Checked that "lsmod | grep usb" didn't return anything
> - modprobe usbmon (this will also load usbcore)
> - start the capture : cat /sys/k
On 27 March 2013 20:00, Alan Stern wrote:
> On Wed, 27 Mar 2013, David Linares wrote:
>
>> Please correct me if I am wrong.
>> On my iMX25 board, I have got a 1-port root_hub which will provide
>> 500mA max to its unique child.
>
> You should check that against the iMX25's specs. It's possible th
On Wed, 27 Mar 2013, David Linares wrote:
> Please correct me if I am wrong.
> On my iMX25 board, I have got a 1-port root_hub which will provide
> 500mA max to its unique child.
You should check that against the iMX25's specs. It's possible that
the root hub has a current limit lower than 500
On 27 March 2013 18:35, Alan Stern wrote:
> On Wed, 27 Mar 2013, David Linares wrote:
>
>> Thanks Alan. I understand, but the USB cable is plugged into an AC/DC
>> adaptor which can provide an output of 1A. After breaking out an USB
>> cable, I measured that the consumption of my board is around 1
On Wed, 27 Mar 2013, David Linares wrote:
> Thanks Alan. I understand, but the USB cable is plugged into an AC/DC
> adaptor which can provide an output of 1A. After breaking out an USB
> cable, I measured that the consumption of my board is around 130mA
> (nothing connected to the hub). Then I mea
On 26 March 2013 18:50, Alan Stern wrote:
> On Tue, 26 Mar 2013, David Linares wrote:
>
>> >> The device I am working on is an embedded device, therefore the wireless
>> >> adapter has to be connected to the internal hub. This hub and the whole
>> >> device
>> >> are powered via an usb cable.
>>
On Tue, 26 Mar 2013, David Linares wrote:
> >> The device I am working on is an embedded device, therefore the wireless
> >> adapter has to be connected to the internal hub. This hub and the whole
> >> device
> >> are powered via an usb cable.
> >
> > Oh. Then maybe the USB cable doesn't provide
On 26 March 2013 15:27, Alan Stern wrote:
> On Tue, 26 Mar 2013, David Linares wrote:
>
>> >> While enabling usbmon, I noticed something that can be related.
>> >> There is a config: "Maximum VBUS Power usage" which is currently set to
>> >> 300mA in my case.
>> >
>> > That option (USB_GADGET_VBUS
On Tue, 26 Mar 2013, David Linares wrote:
> >> While enabling usbmon, I noticed something that can be related.
> >> There is a config: "Maximum VBUS Power usage" which is currently set to
> >> 300mA in my case.
> >
> > That option (USB_GADGET_VBUS_DRAW) applies only to gadgets. That is,
> > it's
On 25 March 2013 18:07, Alan Stern wrote:
> On Mon, 25 Mar 2013, David Linares wrote:
>
>> > Start with usbmon (see Documentation/usb/usbmon.txt).
>>
>> Thanks Alan. I have just compiled my kernel with debugfs and usbmon.
>> I can now easily capture raw text traces after boot-up. But I am interest
On Mon, 25 Mar 2013, David Linares wrote:
> > Start with usbmon (see Documentation/usb/usbmon.txt).
>
> Thanks Alan. I have just compiled my kernel with debugfs and usbmon.
> I can now easily capture raw text traces after boot-up. But I am interested
> in capturing these traces at boot time becau
On 25 March 2013 14:44, Alan Stern wrote:
> On Mon, 25 Mar 2013, David Linares wrote:
>
>> Hi all,
>>
>> I am currently working on an open-source project using linux 3.5.4 on
>> an i.MX25 board manufactured by Voipac.
>> I have been experiencing all sorts of USB issues that I have logged here:
>>
On Mon, 25 Mar 2013, David Linares wrote:
> Hi all,
>
> I am currently working on an open-source project using linux 3.5.4 on
> an i.MX25 board manufactured by Voipac.
> I have been experiencing all sorts of USB issues that I have logged here:
> http://pastebin.com/Ry6fdne5
> As you will
Hi all,
I am currently working on an open-source project using linux 3.5.4 on
an i.MX25 board manufactured by Voipac.
I have been experiencing all sorts of USB issues that I have logged here:
http://pastebin.com/Ry6fdne5
As you will see, it varies from detecting a hub with 0 ports, failing
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