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authorSimon Wood <simon@mungewell.org>2011-06-10 12:00:27 +0200
committerJiri Kosina <jkosina@suse.cz>2011-06-13 13:21:30 +0200
commitc9e4d87758e95ef9d78a7767e2405ebaf54adcd8 (patch)
treedc3c078bae72a37195b5edaf2fb4aaa2a8e94ba3 /drivers/hid
parent61ab44bebdefab296487e7cd723a634849278827 (diff)
HID: hid-sony: fix endiannes of Sixaxis accel/gyro values
The accelerometers/gyro on the Sixaxis are reported in the wrong endianness (ie. not compatible with HID), so this patch intercepts the report and swaps the appropriate bytes over. Accelerometers are scaled with a nominal value of +/-4000 = 1G, maximum value would be around +/-32768 = 8G. Gyro on my device always reports -32768, might need some calibration set within the controller. Fix extracted from previous patch submission: https://patchwork.kernel.org/patch/95212/ Signed-off-by: Marcin Tolysz <tolysz@gmail.com> Signed-off-by: Simon Wood <simon@mungewell.org> Signed-off-by: Antonio Ospite <ospite@studenti.unina.it> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Diffstat (limited to 'drivers/hid')
-rw-r--r--drivers/hid/hid-sony.c20
1 files changed, 20 insertions, 0 deletions
diff --git a/drivers/hid/hid-sony.c b/drivers/hid/hid-sony.c
index 539850769b1..5cd25bd907f 100644
--- a/drivers/hid/hid-sony.c
+++ b/drivers/hid/hid-sony.c
@@ -61,6 +61,25 @@ static __u8 *sony_report_fixup(struct hid_device *hdev, __u8 *rdesc,
return rdesc;
}
+static int sony_raw_event(struct hid_device *hdev, struct hid_report *report,
+ __u8 *rd, int size)
+{
+ struct sony_sc *sc = hid_get_drvdata(hdev);
+
+ /* Sixaxis HID report has acclerometers/gyro with MSByte first, this
+ * has to be BYTE_SWAPPED before passing up to joystick interface
+ */
+ if ((sc->quirks & (SIXAXIS_CONTROLLER_USB | SIXAXIS_CONTROLLER_BT)) &&
+ rd[0] == 0x01 && size == 49) {
+ swap(rd[41], rd[42]);
+ swap(rd[43], rd[44]);
+ swap(rd[45], rd[46]);
+ swap(rd[47], rd[48]);
+ }
+
+ return 0;
+}
+
/*
* The Sony Sixaxis does not handle HID Output Reports on the Interrupt EP
* like it should according to usbhid/hid-core.c::usbhid_output_raw_report()
@@ -209,6 +228,7 @@ static struct hid_driver sony_driver = {
.probe = sony_probe,
.remove = sony_remove,
.report_fixup = sony_report_fixup,
+ .raw_event = sony_raw_event
};
static int __init sony_init(void)