driver: Refactor Kionix Accelerometer drivers.

This commit adds a new basic driver for the Kionix KX022 Accelerometer.
Currently, the driver is capable of reading the sensor data and
manipulating its ODR, resolution, and range.

This sensor also has integrated support for Directional
Tap/Double-Tap(TM), however that functionality is not yet implemented in
the driver.

Lastly, since this accelerometer is very similar to the previous KXCJ9,
this commit tries to combine the drivers.

Note, the variant of the Kionix accelerometer MUST be specified in the
private data structure.

BUG=chrome-os-partner:43494
BRANCH=None
TEST=Build GLaDOS EC with driver enabled and verify that valid
accelerometer data is read, and that range, resolution, and odr can all
be modified.
TEST=Build samus EC image and verify that the lid still
works. Additionally, verify that I can change the odr, rate, and
resolution.
TEST=make buildall tests

Change-Id: I238ff1dc13f5342a93f8f701a0da85c52f25d214
Signed-off-by: Aseda Aboagye <aaboagye@google.com>
Reviewed-on: https://chromium-review.googlesource.com/299013
Commit-Ready: Aseda Aboagye <aaboagye@chromium.org>
Tested-by: Aseda Aboagye <aaboagye@chromium.org>
Reviewed-by: Gwendal Grignou <gwendal@chromium.org>

1 files changed, 122 insertions, 0 deletions

diff --git a/driver/accel_kx022.h b/driver/accel_kx022.h
new file mode 100644
index 0000000000..3ed95a30a8
--- /dev/null
+++ b/driver/accel_kx022.h
@@ -0,0 +1,122 @@
+/* Copyright 2015 The Chromium OS Authors. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+/* KX022 gsensor module for Chrome EC */
+
+#ifndef __CROS_EC_ACCEL_KX022_H
+#define __CROS_EC_ACCEL_KX022_H
+
+/*
+ * 7-bit address is 001111Xb. Where 'X' is determined
+ * by the voltage on the ADDR pin.
+ */
+#define KX022_ADDR0		0x3c
+#define KX022_ADDR1		0x3e
+
+/* Chip-specific registers */
+#define KX022_XHP_L		0x00
+#define KX022_XHP_H		0x01
+#define KX022_YHP_L		0x02
+#define KX022_YHP_H		0x03
+#define KX022_ZHP_L		0x04
+#define KX022_ZHP_H		0x05
+#define KX022_XOUT_L		0x06
+#define KX022_XOUT_H		0x07
+#define KX022_YOUT_L		0x08
+#define KX022_YOUT_H		0x09
+#define KX022_ZOUT_L		0x0a
+#define KX022_ZOUT_H		0x0b
+#define KX022_COTR		0x0c
+#define KX022_WHOAMI		0x0f
+#define KX022_TSCP		0x10
+#define KX022_TSPP		0x11
+#define KX022_INS1		0x12
+#define KX022_INS2		0x13
+#define KX022_INS3		0x14
+#define KX022_STATUS_REG	0x15
+#define KX022_INT_REL		0x17
+#define KX022_CNTL1		0x18
+#define KX022_CNTL2		0x19
+#define KX022_CNTL3		0x1a
+#define KX022_ODCNTL		0x1b
+#define KX022_INC1		0x1c
+#define KX022_INC2		0x1d
+#define KX022_INC3		0x1e
+#define KX022_INC4		0x1f
+#define KX022_INC5		0x20
+#define KX022_INC6		0x21
+#define KX022_TILT_TIMER	0x22
+#define KX022_WUFC		0x23
+#define KX022_TDTRC		0x24
+#define KX022_TDTC		0x25
+#define KX022_TTH		0x26
+#define KX022_TTL		0x27
+#define KX022_FTD		0x28
+#define KX022_STD		0x29
+#define KX022_TLT		0x2a
+#define KX022_TWS		0x2b
+#define KX022_ATH		0x30
+#define KX022_TILT_ANGLE_LL	0x32
+#define KX022_TILT_ANGLE_HL	0x33
+#define KX022_HYST_SET		0x34
+#define KX022_LP_CNTL		0x35
+#define KX022_BUF_CNTL1	0x3a
+#define KX022_BUF_CNTL2	0x3b
+#define KX022_BUF_STATUS_1	0x3c
+#define KX022_BUF_STATUS_2	0x3d
+#define KX022_BUF_CLEAR	0x3e
+#define KX022_BUF_READ		0x3f
+#define KX022_SELF_TEST	0x60
+
+
+#define KX022_CNTL1_PC1		(1 << 7)
+#define KX022_CNTL1_WUFE	(1 << 1)
+
+#define KX022_CNTL2_SRST	(1 << 7)
+
+#define KX022_CNTL3_OWUF_FIELD	7
+
+#define KX022_INC1_IEA		(1 << 4)
+#define KX022_INC1_IEN		(1 << 5)
+
+#define KX022_GSEL_2G		(0 << 3)
+#define KX022_GSEL_4G		(1 << 3)
+#define KX022_GSEL_8G		(2 << 3)
+#define KX022_GSEL_FIELD	(3 << 3)
+
+#define KX022_RES_8BIT		(0 << 6)
+#define KX022_RES_16BIT		(1 << 6)
+
+#define KX022_OSA_0_781HZ	8
+#define KX022_OSA_1_563HZ	9
+#define KX022_OSA_3_125HZ	0xa
+#define KX022_OSA_6_250HZ	0xb
+#define KX022_OSA_12_50HZ	0
+#define KX022_OSA_25_00HZ	1
+#define KX022_OSA_50_00HZ	2
+#define KX022_OSA_100_0HZ	3
+#define KX022_OSA_200_0HZ	4
+#define KX022_OSA_400_0HZ	5
+#define KX022_OSA_800_0HZ	6
+#define KX022_OSA_1600HZ	7
+#define KX022_OSA_FIELD		0xf
+
+#define KX022_OWUF_0_781HZ	0
+#define KX022_OWUF_1_563HZ	1
+#define KX022_OWUF_3_125HZ	2
+#define KX022_OWUF_6_250HZ	3
+#define KX022_OWUF_12_50HZ	4
+#define KX022_OWUF_25_00HZ	5
+#define KX022_OWUF_50_00HZ	6
+#define KX022_OWUF_100_0HZ	7
+
+#define KX022_INC2_ZPWUE	(1 << 0)
+#define KX022_INC2_ZNWUE	(1 << 1)
+#define KX022_INC2_YPWUE	(1 << 2)
+#define KX022_INC2_YNWUE	(1 << 3)
+#define KX022_INC2_XPWUE	(1 << 4)
+#define KX022_INC2_XNWUE	(1 << 5)
+
+#endif /* __CROS_EC_ACCEL_KX022_H */