int wacom_setup_pad_input_capabilities()

in wacom_wac.c [4048:4219]

• 129 lines of code
• 50 McCabe index (conditional complexity)

int wacom_setup_pad_input_capabilities(struct input_dev *input_dev,
				   struct wacom_wac *wacom_wac)
{
	struct wacom_features *features = &wacom_wac->features;

	if ((features->type == HID_GENERIC) && features->numbered_buttons > 0)
		features->device_type |= WACOM_DEVICETYPE_PAD;

	if (!(features->device_type & WACOM_DEVICETYPE_PAD))
		return -ENODEV;

	if (features->type == REMOTE && input_dev == wacom_wac->pad_input)
		return -ENODEV;

	input_dev->evbit[0] |= BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);

	/* kept for making legacy xf86-input-wacom working with the wheels */
	__set_bit(ABS_MISC, input_dev->absbit);

	/* kept for making legacy xf86-input-wacom accepting the pad */
	if (!(input_dev->absinfo && (input_dev->absinfo[ABS_X].minimum ||
	      input_dev->absinfo[ABS_X].maximum)))
		input_set_abs_params(input_dev, ABS_X, 0, 1, 0, 0);
	if (!(input_dev->absinfo && (input_dev->absinfo[ABS_Y].minimum ||
	      input_dev->absinfo[ABS_Y].maximum)))
		input_set_abs_params(input_dev, ABS_Y, 0, 1, 0, 0);

	/* kept for making udev and libwacom accepting the pad */
	__set_bit(BTN_STYLUS, input_dev->keybit);

	wacom_setup_numbered_buttons(input_dev, features->numbered_buttons);

	switch (features->type) {

	case CINTIQ_HYBRID:
	case CINTIQ_COMPANION_2:
	case DTK:
	case DTUS:
	case GRAPHIRE_BT:
		break;

	case WACOM_MO:
		__set_bit(BTN_BACK, input_dev->keybit);
		__set_bit(BTN_LEFT, input_dev->keybit);
		__set_bit(BTN_FORWARD, input_dev->keybit);
		__set_bit(BTN_RIGHT, input_dev->keybit);
		input_set_abs_params(input_dev, ABS_WHEEL, 0, 71, 0, 0);
		break;

	case WACOM_G4:
		__set_bit(BTN_BACK, input_dev->keybit);
		__set_bit(BTN_FORWARD, input_dev->keybit);
		input_set_capability(input_dev, EV_REL, REL_WHEEL);
		break;

	case WACOM_24HD:
		__set_bit(KEY_PROG1, input_dev->keybit);
		__set_bit(KEY_PROG2, input_dev->keybit);
		__set_bit(KEY_PROG3, input_dev->keybit);

		__set_bit(KEY_ONSCREEN_KEYBOARD, input_dev->keybit);
		__set_bit(KEY_INFO, input_dev->keybit);

		if (!features->oPid)
			__set_bit(KEY_BUTTONCONFIG, input_dev->keybit);

		input_set_abs_params(input_dev, ABS_WHEEL, 0, 71, 0, 0);
		input_set_abs_params(input_dev, ABS_THROTTLE, 0, 71, 0, 0);
		break;

	case WACOM_27QHD:
		__set_bit(KEY_PROG1, input_dev->keybit);
		__set_bit(KEY_PROG2, input_dev->keybit);
		__set_bit(KEY_PROG3, input_dev->keybit);

		__set_bit(KEY_ONSCREEN_KEYBOARD, input_dev->keybit);
		__set_bit(KEY_BUTTONCONFIG, input_dev->keybit);

		if (!features->oPid)
			__set_bit(KEY_CONTROLPANEL, input_dev->keybit);
		input_set_abs_params(input_dev, ABS_X, -2048, 2048, 0, 0);
		input_abs_set_res(input_dev, ABS_X, 1024); /* points/g */
		input_set_abs_params(input_dev, ABS_Y, -2048, 2048, 0, 0);
		input_abs_set_res(input_dev, ABS_Y, 1024);
		input_set_abs_params(input_dev, ABS_Z, -2048, 2048, 0, 0);
		input_abs_set_res(input_dev, ABS_Z, 1024);
		__set_bit(INPUT_PROP_ACCELEROMETER, input_dev->propbit);
		break;

	case WACOM_22HD:
		__set_bit(KEY_PROG1, input_dev->keybit);
		__set_bit(KEY_PROG2, input_dev->keybit);
		__set_bit(KEY_PROG3, input_dev->keybit);

		__set_bit(KEY_BUTTONCONFIG, input_dev->keybit);
		__set_bit(KEY_INFO, input_dev->keybit);
		fallthrough;

	case WACOM_21UX2:
	case WACOM_BEE:
	case CINTIQ:
		input_set_abs_params(input_dev, ABS_RX, 0, 4096, 0, 0);
		input_set_abs_params(input_dev, ABS_RY, 0, 4096, 0, 0);
		break;

	case WACOM_13HD:
		input_set_abs_params(input_dev, ABS_WHEEL, 0, 71, 0, 0);
		break;

	case INTUOS3:
	case INTUOS3L:
		input_set_abs_params(input_dev, ABS_RY, 0, 4096, 0, 0);
		fallthrough;

	case INTUOS3S:
		input_set_abs_params(input_dev, ABS_RX, 0, 4096, 0, 0);
		break;

	case INTUOS5:
	case INTUOS5L:
	case INTUOSPM:
	case INTUOSPL:
	case INTUOS5S:
	case INTUOSPS:
	case INTUOSP2_BT:
	case INTUOSP2S_BT:
		input_set_abs_params(input_dev, ABS_WHEEL, 0, 71, 0, 0);
		break;

	case INTUOS4WL:
		/*
		 * For Bluetooth devices, the udev rule does not work correctly
		 * for pads unless we add a stylus capability, which forces
		 * ID_INPUT_TABLET to be set.
		 */
		__set_bit(BTN_STYLUS, input_dev->keybit);
		fallthrough;

	case INTUOS4:
	case INTUOS4L:
	case INTUOS4S:
		input_set_abs_params(input_dev, ABS_WHEEL, 0, 71, 0, 0);
		break;

	case INTUOSHT:
	case BAMBOO_PT:
	case BAMBOO_TOUCH:
	case INTUOSHT2:
		__clear_bit(ABS_MISC, input_dev->absbit);

		__set_bit(BTN_LEFT, input_dev->keybit);
		__set_bit(BTN_FORWARD, input_dev->keybit);
		__set_bit(BTN_BACK, input_dev->keybit);
		__set_bit(BTN_RIGHT, input_dev->keybit);

		break;

	case REMOTE:
		input_set_capability(input_dev, EV_MSC, MSC_SERIAL);
		input_set_abs_params(input_dev, ABS_WHEEL, 0, 71, 0, 0);
		break;

	case INTUOSHT3_BT:
	case HID_GENERIC:
		break;

	default:
		/* no pad supported */
		return -ENODEV;
	}
	return 0;
}