From mboxrd@z Thu Jan 1 00:00:00 1970 From: Simon Wood Subject: [PATCHv4 2/3] sony_ff_byteswap_accelerometer Date: Sat, 4 Jun 2011 02:32:36 -0700 Message-ID: <1307179957-24458-2-git-send-email-simon@mungewell.org> References: <1307179957-24458-1-git-send-email-simon@mungewell.org> Return-path: In-Reply-To: <1307179957-24458-1-git-send-email-simon@mungewell.org> Sender: linux-kernel-owner@vger.kernel.org To: linux-input@vger.kernel.org Cc: linux-kernel@vger.kernel.org, Jiri Kosina , Michael Bauer , Marcin Tolysz , Simon Wood List-Id: linux-input@vger.kernel.org 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 Signed-off-by: Simon Wood --- drivers/hid/hid-sony.c | 19 +++++++++++++++++++ 1 files changed, 19 insertions(+), 0 deletions(-) diff --git a/drivers/hid/hid-sony.c b/drivers/hid/hid-sony.c index 5c930dc..f219746 100644 --- a/drivers/hid/hid-sony.c +++ b/drivers/hid/hid-sony.c @@ -57,6 +57,24 @@ static __u8 *sony_report_fixup(struct hid_device *hdev, __u8 *rdesc, return rdesc; } +/* Sixaxis HID report has acclerometers/gyro with MSByte first, this has + * to be BYTE_SWAPPED before passing up to joystick interface + */ +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); + + if ((sc->quirks & SIXAXIS_CONTROLLER_USB) && + 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() @@ -205,6 +223,7 @@ 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) -- 1.7.4.1