On Tue, Aug 08, 2017 at 05:01:35PM -0700, Cameron Gutman wrote: > 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> > --- > Forgot to CC LKML last time, resending to hit the testbots (and people) > there. Applied, thank you. > > --- > 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 { > -- > 2.13.4 > -- Dmitry -- 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
