Commit 26fe4124 authored by Jason Gerecke's avatar Jason Gerecke Committed by Jiri Kosina
Browse files

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: default avatarJason Gerecke <killertofu@gmail.com>
Reviewed-by: default avatarPing Cheng <pingc@wacom.com>
Signed-off-by: default avatarJiri Kosina <jkosina@suse.cz>
parent ec5fc1c1

drivers/hid/wacom_wac.c

+10 −0
Original line number Diff line number Diff line
@@ -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);

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