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043c550262
id only really needs 4 bits (16 touch events should be more than
enough), so we can steal 2 bits from that field.
We also reorder the fields to make sure that width/x are aligned
on 8-bit boundary.
BRANCH=none
BUG=b:63936194
TEST=Flash hammer, touchpad works, ABS_PRESSURE > 255 is reported
when a palm is pressed on the touchpad.
Change-Id: I1abf1bf53cc9dd998082cea5dc7cd3be17f99ec6
Reviewed-on: https://chromium-review.googlesource.com/583297
Commit-Ready: Nicolas Boichat <drinkcat@chromium.org>
Tested-by: Nicolas Boichat <drinkcat@chromium.org>
Reviewed-by: Chun-ta Lin <itspeter@chromium.org>
Reviewed-by: KT Liao <kt.liao@emc.com.tw>
31 lines
723 B
C
31 lines
723 B
C
/* Copyright 2016 The Chromium OS Authors. All rights reserved.
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*
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* USB HID definitions.
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*/
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#ifndef __CROS_EC_USB_HID_KEYBOARD_H
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#define __CROS_EC_USB_HID_KEYBOARD_H
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struct __attribute__((__packed__)) usb_hid_touchpad_report {
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uint8_t id; /* 0x01 */
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struct __attribute__((__packed__)) {
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unsigned tip:1;
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unsigned inrange:1;
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unsigned id:4;
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unsigned pressure:10;
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unsigned width:12;
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unsigned height:12;
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unsigned x:12;
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unsigned y:12;
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} finger[5];
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uint8_t count:7;
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uint8_t button:1;
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};
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/* class implementation interfaces */
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void set_touchpad_report(struct usb_hid_touchpad_report *report);
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#endif
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