From 26fe41245f43c86f65cae272a2851dd792e443f7 Mon Sep 17 00:00:00 2001 From: Jason Gerecke Date: Tue, 18 Nov 2014 16:50:09 -0800 Subject: [PATCH] HID: wacom: Add angular resolution data to some ABS axes Provide the resolution of several angular axes (tilt, pen rotation, puck rotation) to userspace. Because these values are natively degree-based, we need to convert them to into units/radian as required by the input_absinfo struct. To ensure wraparound behaves properly for the rotation axes, the converted value was rounded up rather than rounded nearest. Notably, the touchring axes (ABS_WHEEL and ABS_THROTTLE) are left without a a declared resolution because the their low resolution cannot be accurately represented (the worst-case rounding-induced error would be ~16 degrees). Pre-scaling the values and range by at least 10x would reduce the error in the resolution to acceptable levels, but the xf86-input-wacom driver is not able to use pre-scaled values for these axes at this time. Signed-off-by: Jason Gerecke Reviewed-by: Ping Cheng Signed-off-by: Jiri Kosina --- drivers/hid/wacom_wac.c | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/drivers/hid/wacom_wac.c b/drivers/hid/wacom_wac.c index 74c9fbde5695..9565d31262ec 100644 --- a/drivers/hid/wacom_wac.c +++ b/drivers/hid/wacom_wac.c @@ -1930,7 +1930,9 @@ static void wacom_setup_cintiq(struct wacom_wac *wacom_wac) 0, wacom_wac->features.distance_max, 0, 0); input_set_abs_params(input_dev, ABS_WHEEL, 0, 1023, 0, 0); input_set_abs_params(input_dev, ABS_TILT_X, -64, 63, 0, 0); + input_abs_set_res(input_dev, ABS_TILT_X, 57); input_set_abs_params(input_dev, ABS_TILT_Y, -64, 63, 0, 0); + input_abs_set_res(input_dev, ABS_TILT_Y, 57); } static void wacom_setup_intuos(struct wacom_wac *wacom_wac) @@ -1950,6 +1952,7 @@ static void wacom_setup_intuos(struct wacom_wac *wacom_wac) __set_bit(BTN_TOOL_LENS, input_dev->keybit); input_set_abs_params(input_dev, ABS_RZ, -900, 899, 0, 0); + input_abs_set_res(input_dev, ABS_RZ, 287); input_set_abs_params(input_dev, ABS_THROTTLE, -1023, 1023, 0, 0); } @@ -2092,6 +2095,7 @@ int wacom_setup_pentouch_input_capabilities(struct input_dev *input_dev, case WACOM_24HD: input_set_abs_params(input_dev, ABS_Z, -900, 899, 0, 0); + input_abs_set_res(input_dev, ABS_Z, 287); input_set_abs_params(input_dev, ABS_THROTTLE, 0, 71, 0, 0); /* fall through */ @@ -2106,6 +2110,7 @@ int wacom_setup_pentouch_input_capabilities(struct input_dev *input_dev, case WACOM_BEE: case CINTIQ: input_set_abs_params(input_dev, ABS_Z, -900, 899, 0, 0); + input_abs_set_res(input_dev, ABS_Z, 287); __set_bit(INPUT_PROP_DIRECT, input_dev->propbit); @@ -2114,6 +2119,7 @@ int wacom_setup_pentouch_input_capabilities(struct input_dev *input_dev, case WACOM_13HD: input_set_abs_params(input_dev, ABS_Z, -900, 899, 0, 0); + input_abs_set_res(input_dev, ABS_Z, 287); __set_bit(INPUT_PROP_DIRECT, input_dev->propbit); wacom_setup_cintiq(wacom_wac); break; @@ -2122,6 +2128,7 @@ int wacom_setup_pentouch_input_capabilities(struct input_dev *input_dev, case INTUOS3L: case INTUOS3S: input_set_abs_params(input_dev, ABS_Z, -900, 899, 0, 0); + input_abs_set_res(input_dev, ABS_Z, 287); /* fall through */ case INTUOS: @@ -2144,6 +2151,7 @@ int wacom_setup_pentouch_input_capabilities(struct input_dev *input_dev, 0, 0); input_set_abs_params(input_dev, ABS_Z, -900, 899, 0, 0); + input_abs_set_res(input_dev, ABS_Z, 287); wacom_setup_intuos(wacom_wac); } else if (features->device_type == BTN_TOOL_FINGER) { @@ -2162,6 +2170,7 @@ int wacom_setup_pentouch_input_capabilities(struct input_dev *input_dev, case INTUOS4L: case INTUOS4S: input_set_abs_params(input_dev, ABS_Z, -900, 899, 0, 0); + input_abs_set_res(input_dev, ABS_Z, 287); wacom_setup_intuos(wacom_wac); __set_bit(INPUT_PROP_POINTER, input_dev->propbit); @@ -2264,6 +2273,7 @@ int wacom_setup_pentouch_input_capabilities(struct input_dev *input_dev, case CINTIQ_HYBRID: input_set_abs_params(input_dev, ABS_Z, -900, 899, 0, 0); + input_abs_set_res(input_dev, ABS_Z, 287); __set_bit(INPUT_PROP_DIRECT, input_dev->propbit); wacom_setup_cintiq(wacom_wac);