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Commit 4a864183 authored by Henrik Rydberg's avatar Henrik Rydberg
Browse files

hid: egalax: Setup input device manually 



The hid core does not yet handle input filtering. Take over the setup
of the input device, so that proper signal-to-noise ratios can be
used.

Signed-off-by: default avatarJiri Kosina <jkosina@suse.cz>
Cc: Stephane Chatty <chatty@enac.fr>
Signed-off-by: default avatarHenrik Rydberg <rydberg@euromail.se>
parent e42a98b5

drivers/hid/hid-egalax.c

+22 −12
Original line number Diff line number Diff line
@@ -34,10 +34,21 @@ struct egalax_data { 
	__u16 lastx, lasty, lastz;	/* latest valid (x, y, z) in the frame */

};



static void set_abs(struct input_dev *input, unsigned int code,

		    struct hid_field *field, int snratio)

{

	int fmin = field->logical_minimum;

	int fmax = field->logical_maximum;

	int fuzz = snratio ? (fmax - fmin) / snratio : 0;

	input_set_abs_params(input, code, fmin, fmax, fuzz, 0);

}



static int egalax_input_mapping(struct hid_device *hdev, struct hid_input *hi,

		struct hid_field *field, struct hid_usage *usage,

		unsigned long **bit, int *max)

{

	struct input_dev *input = hi->input;



	switch (usage->hid & HID_USAGE_PAGE) {



	case HID_UP_GENDESK:
@@ -45,18 +56,16 @@ static int egalax_input_mapping(struct hid_device *hdev, struct hid_input *hi, 
		case HID_GD_X:

			hid_map_usage(hi, usage, bit, max,

					EV_ABS, ABS_MT_POSITION_X);

			set_abs(input, ABS_MT_POSITION_X, field, 0);

			/* touchscreen emulation */

			input_set_abs_params(hi->input, ABS_X,

						field->logical_minimum,

						field->logical_maximum, 0, 0);

			set_abs(input, ABS_X, field, 0);

			return 1;

		case HID_GD_Y:

			hid_map_usage(hi, usage, bit, max,

					EV_ABS, ABS_MT_POSITION_Y);

			set_abs(input, ABS_MT_POSITION_Y, field, 0);

			/* touchscreen emulation */

			input_set_abs_params(hi->input, ABS_Y,

						field->logical_minimum,

						field->logical_maximum, 0, 0);

			set_abs(input, ABS_Y, field, 0);

			return 1;

		}

		return 0;
@@ -66,6 +75,7 @@ static int egalax_input_mapping(struct hid_device *hdev, struct hid_input *hi, 
		case HID_DG_TIPSWITCH:

			/* touchscreen emulation */

			hid_map_usage(hi, usage, bit, max, EV_KEY, BTN_TOUCH);

			input_set_capability(input, EV_KEY, BTN_TOUCH);

			return 1;

		case HID_DG_INRANGE:

		case HID_DG_CONFIDENCE:
@@ -75,14 +85,14 @@ static int egalax_input_mapping(struct hid_device *hdev, struct hid_input *hi, 
		case HID_DG_CONTACTID:

			hid_map_usage(hi, usage, bit, max,

					EV_ABS, ABS_MT_TRACKING_ID);

			set_abs(input, ABS_MT_TRACKING_ID, field, 0);

			return 1;

		case HID_DG_TIPPRESSURE:

			hid_map_usage(hi, usage, bit, max,

					EV_ABS, ABS_MT_PRESSURE);

			set_abs(input, ABS_MT_PRESSURE, field, 0);

			/* touchscreen emulation */

			input_set_abs_params(hi->input, ABS_PRESSURE,

						field->logical_minimum,

						field->logical_maximum, 0, 0);

			set_abs(input, ABS_PRESSURE, field, 0);

			return 1;

		}

		return 0;
@@ -96,10 +106,10 @@ static int egalax_input_mapped(struct hid_device *hdev, struct hid_input *hi, 
		struct hid_field *field, struct hid_usage *usage,

		unsigned long **bit, int *max)

{

	/* tell hid-input to skip setup of these event types */

	if (usage->type == EV_KEY || usage->type == EV_ABS)

		clear_bit(usage->code, *bit);



	return 0;

		set_bit(usage->type, hi->input->evbit);

	return -1;

}



/*