driver: Add L3GD20H gyrometer basic driver support

BUG=chrome-os-partner:40465
BRANCH=None
TEST=Added Gyro config to test L3GD20H Gyro sensor in Kunimitsu.
     Able to read the gyro data from "accelinfo" console command.
     Rotated the sensor in X,Y,Z axis, respective axis values change.
     Fits into the existing accel/gyro framework.

Change-Id: I19369560ddad5160c2fc9c7ef9823bd37b5389fa
Signed-off-by: Bolat Dinc <bolat.dinc@intel.com>
Signed-off-by: Divya Jyothi <divya.jyothi@intel.com>
Signed-off-by: Vijay Hiremath <vijay.p.hiremath@intel.com>
Reviewed-on: https://chromium-review.googlesource.com/264650
Commit-Ready: Vijay P Hiremath <vijay.p.hiremath@intel.com>
Tested-by: Vijay P Hiremath <vijay.p.hiremath@intel.com>
Reviewed-by: Shawn N <shawnn@chromium.org>

1 files changed, 102 insertions, 0 deletions

diff --git a/driver/gyro_l3gd20h.h b/driver/gyro_l3gd20h.h
new file mode 100644
index 0000000000..73c0253d27
--- /dev/null
+++ b/driver/gyro_l3gd20h.h
@@ -0,0 +1,102 @@
+/* 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.
+ */
+
+/* L3GD20H gyro module for Chrome EC */
+
+#ifndef __CROS_EC_GYRO_L3GD20H_H
+#define __CROS_EC_GYRO_L3GD20H_H
+
+#include "accelgyro.h"
+#include "task.h"
+
+/*
+ * 7-bit address is 110101Xb. Where 'X' is determined
+ * by the voltage on the ADDR pin.
+ */
+#define L3GD20_ADDR0             0xd4
+#define L3GD20_ADDR1             0xd6
+
+/* who am I  */
+#define L3GD20_WHO_AM_I          0xd7
+
+/* Chip specific registers. */
+#define L3GD20_WHO_AM_I_REG      0x0f
+#define L3GD20_CTRL_REG1         0x20
+#define L3GD20_CTRL_REG2         0x21
+#define L3GD20_CTRL_REG3         0x22
+#define L3GD20_CTRL_REG4         0x23
+#define L3GD20_CTRL_REG5         0x24
+#define L3GD20_CTRL_REFERENCE    0x25
+#define L3GD20_OUT_TEMP          0x26
+#define L3GD20_STATUS_REG        0x27
+#define L3GD20_OUT_X_L           0x28
+#define L3GD20_OUT_X_H           0x29
+#define L3GD20_OUT_Y_L           0x2a
+#define L3GD20_OUT_Y_H           0x2b
+#define L3GD20_OUT_Z_L           0x2c
+#define L3GD20_OUT_Z_H           0x2d
+#define L3GD20_FIFO_CTRL_REG     0x2e
+#define L3GD20_FIFO_SRC_REG      0x2f
+#define L3GD20_INT1_CFG          0x30
+#define L3GD20_INT1_SRC          0x31
+#define L3GD20_INT1_TSH_XH       0x32
+#define L3GD20_INT1_TSH_XL       0x33
+#define L3GD20_INT1_TSH_YH       0x34
+#define L3GD20_INT1_TSH_YL       0x35
+#define L3GD20_INT1_TSH_ZH       0x36
+#define L3GD20_INT1_TSH_ZL       0x37
+#define L3GD20_INT1_DURATION     0x38
+#define L3GD20_LOW_ODR           0x39
+
+#define L3GD20_DPS_SEL_245       (0 << 4)
+#define L3GD20_DPS_SEL_500       (1 << 4)
+#define L3GD20_DPS_SEL_2000_0    (2 << 4)
+#define L3GD20_DPS_SEL_2000_1    (3 << 4)
+
+#define L3GD20_ODR_PD            (0 << 3)
+#define L3GD20_ODR_12_5HZ        (0 << 6)
+#define L3GD20_ODR_25HZ          (1 << 6)
+#define L3GD20_ODR_50HZ_0        (2 << 6)
+#define L3GD20_ODR_50HZ_1        (3 << 6)
+#define L3GD20_ODR_100HZ         (0 << 6)
+#define L3GD20_ODR_200HZ         (1 << 6)
+#define L3GD20_ODR_400HZ         (2 << 6)
+#define L3GD20_ODR_800HZ         (3 << 6)
+
+#define L3GD20_ODR_MASK          (3 << 6)
+#define L3GD20_STS_ZYXDA_MASK    (1 << 3)
+#define L3GD20_RANGE_MASK        (3 << 4)
+#define L3GD20_LOW_ODR_MASK      (1 << 0)
+#define L3GD20_ODR_PD_MASK       (1 << 3)
+
+/*
+ * Register      : STATUS_REG
+ * Address       : 0X27
+ */
+enum l3gd20_status {
+	L3GD20_STS_DOWN          = 0x00,
+	L3GD20_STS_ZYXDA_UP      = 0x08,
+};
+
+/*
+ * Register      : CTRL_REG4
+ * Address       : 0X23
+ * Bit Group Name: BDU
+ */
+enum l3gd20_bdu {
+	L3GD20_BDU_DISABLE       = 0x00,
+	L3GD20_BDU_ENABLE        = 0x80,
+};
+
+/* Sensor resolution in number of bits. This sensor has fixed resolution. */
+#define L3GD20_RESOLUTION        16
+
+extern const struct accelgyro_drv l3gd20h_drv;
+struct l3gd20_data {
+	struct accelgyro_saved_data_t base;
+	int16_t offset[3];
+};
+
+#endif /* __CROS_EC_GYRO_L3GD20H_H */