On Thu, Sep 10, 2015 at 06:51:33PM +0300, Peter Mamonov wrote: > On Thu, 10 Sep 2015 09:38:15 +0200 > Sascha Hauer <s.hauer@xxxxxxxxxxxxxx> wrote: > > > Excellent! This makes the framebuffer console support complete :) > > I'm sorry to dissapoint you, but this implementation of the usb > keyboard driver seems to be wrong. The driver employs the get_report > request to poll the keyboard state via the control endpoint, however > the "Device Class Definition for Human Interface Devices (HID)" states > the following: > "This request is not intended to be used for polling the device state > on a regular basis. [...] The Interrupt In pipe should be used for > recurring Input reports." > > I guess this is the source of the problems with some keyboards: 2 of 4 > keyboards I've tested changed their state only on key down, but not > on key up. Yes, same here. The first keyboard I tested ended up with this behaviour, the second worked. > > So, according the standard, we need to poll a keyboard via interrupt > endpoint. However, current implementation of EHCI driver doesn't support > interrupt transactions: submit_int_msg() in ehci-hcd.c is a stub. I'll > try to implement it. U-Boot has an implementation for it, should be possible to adopt the corresponding code. Sascha -- Pengutronix e.K. | | Industrial Linux Solutions | http://www.pengutronix.de/ | Peiner Str. 6-8, 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 | Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 | _______________________________________________ barebox mailing list barebox@xxxxxxxxxxxxxxxxxxx http://lists.infradead.org/mailman/listinfo/barebox
