Re: [Libusb-devel] Question about control messages

[Felipe B. <fel...@us...>]

On 5/28/07, Peter Stuge <stu...@cd...> wrote:
> On Mon, May 28, 2007 at 03:47:26PM +0300, Felipe Balbi wrote:
> > When I issue usb_reset(udev) it's working fine...
> >
> > When I issue usb_control_msg(udev, USB_ENDPOINT_IN,
> > USB_REQ_SET_FEATURE | 0x2300, USB_PORT_FEAT_TEST, TEST_FORCE_ENABLE,
> > buf, sizeof(buf), TIMEOUT) I'm getting error -32 (ENODEV).
> >
> > Can anyone of you guys help me??
>
> Maybe the operating system doesn't support this control request??

yes... it supports, I'm the one developing the driver for this
controller and I know what the controller supports.

> Maybe the device hasn't been opened properly??

yes... it was... I'm using the same usb_dev_handle used to do reset.

> (usb_reset() deals with the hub port that the device is attached to
> IIRC)

Yeah... that's right... And I'm trying to set that port into test
modes. The test modes you can check at usb2.0 Specs... but those are
TEST_J, TEST_K, TEST_SE0_NAK, TEST_PACKET, SINGLE_STEP_GET_DESCRIPTOR,
SINGLE_STEP_SET_FEATURE... and some others...

>
>
> > How can I issue SOF packets??
>
> You can't!!
>
> libusb and probably all host software you can find doesn't work with
> packets but with transfers, or maybe transactions if you're lucky.
>
> I don't know if the HCI actually allows the programmer to deal with
> packets - it wouldn't surprise me if it's handled completely or
> mostly in hardware.

Ok.. let me try again this one:
Is there any way to send a control transfer to the HCI, using
usb_control_msg() to force the HCI to send SOF packets?? According to
the Specification of the USBHSET tool in lots of tests I have to send
SOFs during 15secs... maybe it could be automatic... and I just need
to sleep(15)... or something like that...


>
>
> //Peter
>
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-- 
Best Regards,

Felipe Balbi
fel...@us...