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authorBenjamin Tissoires <benjamin.tissoires@redhat.com>2014-08-25 21:07:10 +0400
committerJiri Kosina <jkosina@suse.cz>2014-08-26 11:24:45 +0400
commit79346d620e9de87912de73337f6df8b7f9a46888 (patch)
tree36d2e3bb4e9f70485a778b3234e324d08ad13bab /drivers/hid
parentcee5aa1f81b1e88d8de05df226bfd207041954c2 (diff)
downloadlinux-79346d620e9de87912de73337f6df8b7f9a46888.tar.xz
HID: input: force generic axis to be mapped to their user space axis
Atmel 840B digitizer presents a stylus interface which reports twice the X coordinate and then twice the Y coordinate. In its current implementation, hid-input assign the first X to X, then the second to Y, then the first Y to Z, then the second one to RX. This is wrong, and X should always be mapped to X, no matter what. A solution consists in forcing X, Y, Z, RX, RY, RZ to be mapped to their correct user space counter part. Reported-by: Éric Brunet <Eric.Brunet@lps.ens.fr> Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Diffstat (limited to 'drivers/hid')
-rw-r--r--drivers/hid/hid-input.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/hid/hid-input.c b/drivers/hid/hid-input.c
index 2619f7f4517a..2df7fddbd119 100644
--- a/drivers/hid/hid-input.c
+++ b/drivers/hid/hid-input.c
@@ -599,6 +599,12 @@ static void hidinput_configure_usage(struct hid_input *hidinput, struct hid_fiel
/* These usage IDs map directly to the usage codes. */
case HID_GD_X: case HID_GD_Y: case HID_GD_Z:
case HID_GD_RX: case HID_GD_RY: case HID_GD_RZ:
+ if (field->flags & HID_MAIN_ITEM_RELATIVE)
+ map_rel(usage->hid & 0xf);
+ else
+ map_abs_clear(usage->hid & 0xf);
+ break;
+
case HID_GD_SLIDER: case HID_GD_DIAL: case HID_GD_WHEEL:
if (field->flags & HID_MAIN_ITEM_RELATIVE)
map_rel(usage->hid & 0xf);