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Commit 0228db70 authored by Chase Douglas's avatar Chase Douglas Committed by Jiri Kosina
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HID: magicmouse: simplify touch down logic 



For the MT protocol, we need to properly keep track of each down touch.
This change simplifies the logic, and should make things easier when
support for the Magic Trackpad is added.

Signed-off-by: default avatarChase Douglas <chase.douglas@canonical.com>
Acked-by: default avatarMichael Poole <mdpoole@troilus.org>
Signed-off-by: default avatarJiri Kosina <jkosina@suse.cz>
parent 763008c4

drivers/hid/hid-magicmouse.c

+9 −18
Original line number Diff line number Diff line
@@ -98,7 +98,6 @@ struct magicmouse_sc { 
		short scroll_x;

		short scroll_y;

		u8 size;

		u8 down;

	} touches[16];

	int tracking_ids[16];

};
@@ -226,8 +225,6 @@ static void magicmouse_emit_touch(struct magicmouse_sc *msc, int raw_id, u8 *tda 
	if (report_touches && down) {

		int orientation = (misc >> 10) - 32;



		msc->touches[id].down = 1;



		input_report_abs(input, ABS_MT_TRACKING_ID, id);

		input_report_abs(input, ABS_MT_TOUCH_MAJOR, tdata[3]);

		input_report_abs(input, ABS_MT_TOUCH_MINOR, tdata[4]);
@@ -240,6 +237,9 @@ static void magicmouse_emit_touch(struct magicmouse_sc *msc, int raw_id, u8 *tda 


		input_mt_sync(input);

	}



	if (down)

		msc->ntouches++;

}



static int magicmouse_raw_event(struct hid_device *hdev,
@@ -247,7 +247,7 @@ static int magicmouse_raw_event(struct hid_device *hdev, 
{

	struct magicmouse_sc *msc = hid_get_drvdata(hdev);

	struct input_dev *input = msc->input;

	int x, y, ts, ii, clicks, last_up;

	int x, y, ts, ii, clicks, npoints;



	switch (data[0]) {

	case 0x10:
@@ -264,22 +264,13 @@ static int magicmouse_raw_event(struct hid_device *hdev, 
		ts = data[3] >> 6 | data[4] << 2 | data[5] << 10;

		msc->delta_time = (ts - msc->last_timestamp) & 0x3ffff;

		msc->last_timestamp = ts;

		msc->ntouches = (size - 6) / 8;

		for (ii = 0; ii < msc->ntouches; ii++)

		npoints = (size - 6) / 8;

		msc->ntouches = 0;

		for (ii = 0; ii < npoints; ii++)

			magicmouse_emit_touch(msc, ii, data + ii * 8 + 6);



		if (report_touches) {

			last_up = 1;

			for (ii = 0; ii < ARRAY_SIZE(msc->touches); ii++) {

				if (msc->touches[ii].down) {

					last_up = 0;

					msc->touches[ii].down = 0;

				}

			}

			if (last_up) {

		if (report_touches && msc->ntouches == 0)

			input_mt_sync(input);

			}

		}



		/* When emulating three-button mode, it is important

		 * to have the current touch information before