iio: common: ssp_sensors: Add sensorhub driver

Sensorhub  is MCU dedicated to collect data and manage several sensors.
Sensorhub is a spi device which provides a layer for IIO devices. It provides
some data parsing and common mechanism for sensorhub sensors.

Adds common sensorhub library for sensorhub driver and iio drivers
which uses sensorhub MCU to communicate with sensors.

Signed-off-by: Karol Wrona <k.wrona@samsung.com>
Acked-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>

1 files changed, 82 insertions, 0 deletions

diff --git a/include/linux/iio/common/ssp_sensors.h b/include/linux/iio/common/ssp_sensors.h
new file mode 100644
index 000000000000..f4d1b0edb432
--- /dev/null
+++ b/include/linux/iio/common/ssp_sensors.h
@@ -0,0 +1,82 @@
+/*
+ *  Copyright (C) 2014, Samsung Electronics Co. Ltd. All Rights Reserved.
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ */
+#ifndef _SSP_SENSORS_H_
+#define _SSP_SENSORS_H_
+
+#include <linux/iio/iio.h>
+
+#define SSP_TIME_SIZE                           4
+#define SSP_ACCELEROMETER_SIZE                  6
+#define SSP_GYROSCOPE_SIZE                      6
+#define SSP_BIO_HRM_RAW_SIZE                    8
+#define SSP_BIO_HRM_RAW_FAC_SIZE                36
+#define SSP_BIO_HRM_LIB_SIZE                    8
+
+/**
+ * enum ssp_sensor_type - SSP sensor type
+ */
+enum ssp_sensor_type {
+        SSP_ACCELEROMETER_SENSOR = 0,
+        SSP_GYROSCOPE_SENSOR,
+        SSP_GEOMAGNETIC_UNCALIB_SENSOR,
+        SSP_GEOMAGNETIC_RAW,
+        SSP_GEOMAGNETIC_SENSOR,
+        SSP_PRESSURE_SENSOR,
+        SSP_GESTURE_SENSOR,
+        SSP_PROXIMITY_SENSOR,
+        SSP_TEMPERATURE_HUMIDITY_SENSOR,
+        SSP_LIGHT_SENSOR,
+        SSP_PROXIMITY_RAW,
+        SSP_ORIENTATION_SENSOR,
+        SSP_STEP_DETECTOR,
+        SSP_SIG_MOTION_SENSOR,
+        SSP_GYRO_UNCALIB_SENSOR,
+        SSP_GAME_ROTATION_VECTOR,
+        SSP_ROTATION_VECTOR,
+        SSP_STEP_COUNTER,
+        SSP_BIO_HRM_RAW,
+        SSP_BIO_HRM_RAW_FAC,
+        SSP_BIO_HRM_LIB,
+        SSP_SENSOR_MAX,
+};
+
+struct ssp_data;
+
+/**
+ * struct ssp_sensor_data - Sensor object
+ * @process_data:       Callback to feed sensor data.
+ * @type:               Used sensor type.
+ * @buffer:             Received data buffer.
+ */
+struct ssp_sensor_data {
+        int (*process_data)(struct iio_dev *indio_dev, void *buf,
+                            int64_t timestamp);
+        enum ssp_sensor_type type;
+        u8 *buffer;
+};
+
+void ssp_register_consumer(struct iio_dev *indio_dev,
+                           enum ssp_sensor_type type);
+
+int ssp_enable_sensor(struct ssp_data *data, enum ssp_sensor_type type,
+                      u32 delay);
+
+int ssp_disable_sensor(struct ssp_data *data, enum ssp_sensor_type type);
+
+u32 ssp_get_sensor_delay(struct ssp_data *data, enum ssp_sensor_type);
+
+int ssp_change_delay(struct ssp_data *data, enum ssp_sensor_type type,
+                     u32 delay);
+#endif /* _SSP_SENSORS_H_ */