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8a3b998868
Using the lid angle, detect if we are in tablet mode or not.
We are in tablet mode when the lid angle is large enough:
tablet_mode:
1 | +-----<----+----------
| \/ /\
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0 |------------------------>----+
+------------------+----------+----------+ lid angle
0 240 300 360
BRANCH=kevin
BUG=chrome-os-partner:55702,b:27849483
TEST=Check on Kevin event are sent on tablet mode transition.
Change-Id: Id9935ce4dd717e2c20fa6c9520defb504a1760d9
Signed-off-by: Gwendal Grignou <gwendal@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/383073
Reviewed-by: Aseda Aboagye <aaboagye@chromium.org>
58 lines
1.5 KiB
C
58 lines
1.5 KiB
C
/* Copyright (c) 2014 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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/* Header for motion_lid.h */
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#ifndef __CROS_EC_MOTION_LID_H
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#define __CROS_EC_MOTION_LID_H
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#include "host_command.h"
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#include "math_util.h"
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/**
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* This structure defines all of the data needed to specify the orientation
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* of the base and lid accelerometers in order to calculate the lid angle.
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*/
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struct accel_orientation {
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/* Rotation matrix to rotate positive 90 degrees around the hinge. */
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matrix_3x3_t rot_hinge_90;
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/*
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* Rotation matrix to rotate 180 degrees around the hinge. The value
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* here should be rot_hinge_90 ^ 2.
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*/
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matrix_3x3_t rot_hinge_180;
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/* Vector pointing along hinge axis. */
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vector_3_t hinge_axis;
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};
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/* Link global structure for orientation. This must be defined in board.c. */
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extern const struct accel_orientation acc_orient;
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/**
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* Get last calculated lid angle. Note, the lid angle calculated by the EC
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* is un-calibrated and is an approximate angle.
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*
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* @return lid angle in degrees in range [0, 360], or LID_ANGLE_UNRELIABLE
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* if the lid angle can't be determined.
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*/
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int motion_lid_get_angle(void);
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int host_cmd_motion_lid(struct host_cmd_handler_args *args);
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void motion_lid_calc(void);
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#ifdef CONFIG_LID_ANGLE_TABLET_MODE
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int motion_lid_in_tablet_mode(void);
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#else
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static inline int motion_lid_in_tablet_mode(void) { return 0; }
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#endif
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#endif /* __CROS_EC_MOTION_LID_H */
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