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Certain versions of Cypress USB barcode readers (this problem is known to
happen at least with PIDs 0xde61 and 0xde64) have report descriptor which
has swapped usage min and usage max tag. This results in HID parser failing
for report descriptor of these devices, as it (wrongly) requires allocating
more usages than HID_MAX_USAGES.
Solve this by walking through the report descriptor for such devices, and swap
the usage min and usage max items (and their values) to be in proper order.
Reported-by: Bret Towe <magnade@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
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It turns out that there are broken devices out there that incorrectly
report VID/PID as 0x000, see http://lkml.org/lkml/2007/4/27/496
Therefore we should not confuse users by dumping warnings and stacktraces
in such situation. It is not possible to add quirks for such horribly
broken devices, but currently that's not needed.
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
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Add a 'quirks' module parameter for the usbhid module, so users can
add or modify quirks at module load time.
Signed-off-by: Paul Walmsley <paul@booyaka.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
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Add internal support for dynamically-allocated HID quirks, "dquirks"
(for "dynamic quirks"). Includes several functions to add/modify quirks
from the list. This code is used by the next patch to implement quirk
modification upon module load.
Signed-off-by: Paul Walmsley <paul@booyaka.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
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Rename existing quirks handling code that operates over a static array
to "squirks" (short for static quirks) to differentiate it from the
dynamically-allocated quirks that will be introduced in the
next patch. Add an accessor function specifically for static quirks,
usbhid_exists_squirk().
Signed-off-by: Paul Walmsley <paul@booyaka.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
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Move the USB_VENDOR* and USB_DEVICE* defines and the hid_blacklist[]
array there from hid-core.c. Add
hid-quirks.c:usbhid_lookup_any_quirks() to return quirk information to
hid-core.c. Convert __u32, __u16 types to u32, u16.
Signed-off-by: Paul Walmsley <paul@booyaka.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
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