HID: fixup quirk for NCR devices
authorJiri Kosina <jkosina@suse.cz>
Thu, 5 Nov 2009 13:08:03 +0000 (14:08 +0100)
committerJiri Kosina <jkosina@suse.cz>
Thu, 5 Nov 2009 13:08:03 +0000 (14:08 +0100)
commit5b915d9e6dc3d22fedde91dfef1cb1a8fa9a1870
tree9fbb2a7cdef4b0c760affdf5425adcdc43f9e428
parent73cdcf567aaa4b348a1150c85ac5917c32f3c7f9
HID: fixup quirk for NCR devices

NCR devices are terminally broken by design -- they claim themselves to contain
proper input applications in their HID report descriptor, but behave very badly
if treated in standard way.

According to NCR developers, the devices get confused when queried for reports
in a standard way, rendering them unusable.

NCR is shipping application called "RPSL" that can be used to drive these
devices through hiddev, under the assumption that in-kernel driver doesn't
perform initial report query.
If it does, neither in-kernel nor hiddev-based driver can operate with these
devices any more.

Introduce a quirk that skips the report query for all NCR devices. The previous
NOGET quirk was wrong and had been introduced because I misunderstood the nature
of brokenness of these devices.

Signed-off-by: Jiri Kosina <jkosina@suse.cz>
drivers/hid/usbhid/hid-core.c
drivers/hid/usbhid/hid-quirks.c
include/linux/hid.h