The PowerA gamepad initialization quirk worked with the PowerA wired gamepad I had around (0x24c6:0x543a), but a user reported [0] that it didn't work for him, even though our gamepads shared the same vendor and product IDs. When I initially implemented the PowerA quirk, I wanted to avoid actually triggering the rumble action during init. My tests showed that my gamepad would work correctly even if it received a rumble of 0 intensity, so that's what I went with. Unfortunately, this apparently isn't true for all models (perhaps a firmware difference?). This non-working gamepad seems to require the real magic rumble packet that the Microsoft driver sends, which actually vibrates the gamepad. To counteract this effect, I still send the old zero-rumble PowerA quirk packet which cancels the rumble effect before the motors can spin up enough to vibrate. [0]: https://github.com/paroj/xpad/issues/48#issuecomment-313904867 Reported-by: Kyle Beauchamp <kyleabeauchamp@xxxxxxxxx> Tested-by: Kyle Beauchamp <kyleabeauchamp@xxxxxxxxx> Fixes: 81093c9848a7 ("Input: xpad - support some quirky Xbox One pads") Cc: stable@xxxxxxxxxxxxxxx # v4.12 Signed-off-by: Cameron Gutman <aicommander@xxxxxxxxx> --- drivers/input/joystick/xpad.c | 24 +++++++++++++++++++----- 1 file changed, 19 insertions(+), 5 deletions(-) diff --git a/drivers/input/joystick/xpad.c b/drivers/input/joystick/xpad.c index 298a6ba51411..ca0e19ae7a90 100644 --- a/drivers/input/joystick/xpad.c +++ b/drivers/input/joystick/xpad.c @@ -476,10 +476,21 @@ static const u8 xboxone_hori_init[] = { }; /* - * A rumble packet is required for some PowerA pads to start + * A specific rumble packet is required for some PowerA pads to start * sending input reports. One of those pads is (0x24c6:0x543a). */ -static const u8 xboxone_zerorumble_init[] = { +static const u8 xboxone_rumblebegin_init[] = { + 0x09, 0x00, 0x00, 0x09, 0x00, 0x0F, 0x00, 0x00, + 0x1D, 0x1D, 0xFF, 0x00, 0x00 +}; + +/* + * A rumble packet with zero FF intensity will immediately + * terminate the rumbling required to init PowerA pads. + * This should happen fast enough that the motors don't + * spin up to enough speed to actually vibrate the gamepad. + */ +static const u8 xboxone_rumbleend_init[] = { 0x09, 0x00, 0x00, 0x09, 0x00, 0x0F, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }; @@ -494,9 +505,12 @@ static const struct xboxone_init_packet xboxone_init_packets[] = { XBOXONE_INIT_PKT(0x0e6f, 0x0165, xboxone_hori_init), XBOXONE_INIT_PKT(0x0f0d, 0x0067, xboxone_hori_init), XBOXONE_INIT_PKT(0x0000, 0x0000, xboxone_fw2015_init), - XBOXONE_INIT_PKT(0x24c6, 0x541a, xboxone_zerorumble_init), - XBOXONE_INIT_PKT(0x24c6, 0x542a, xboxone_zerorumble_init), - XBOXONE_INIT_PKT(0x24c6, 0x543a, xboxone_zerorumble_init), + XBOXONE_INIT_PKT(0x24c6, 0x541a, xboxone_rumblebegin_init), + XBOXONE_INIT_PKT(0x24c6, 0x542a, xboxone_rumblebegin_init), + XBOXONE_INIT_PKT(0x24c6, 0x543a, xboxone_rumblebegin_init), + XBOXONE_INIT_PKT(0x24c6, 0x541a, xboxone_rumbleend_init), + XBOXONE_INIT_PKT(0x24c6, 0x542a, xboxone_rumbleend_init), + XBOXONE_INIT_PKT(0x24c6, 0x543a, xboxone_rumbleend_init), }; struct xpad_output_packet { -- 2.13.0 -- To unsubscribe from this list: send the line "unsubscribe linux-input" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
