Initial import

4 files changed, 423 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 000000000..f4d1b0edb
--- /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_ */
diff --git a/include/linux/iio/common/st_sensors.h b/include/linux/iio/common/st_sensors.h
new file mode 100644
index 000000000..2c476acb8
--- /dev/null
+++ b/include/linux/iio/common/st_sensors.h
@@ -0,0 +1,290 @@
+/*
+ * STMicroelectronics sensors library driver
+ *
+ * Copyright 2012-2013 STMicroelectronics Inc.
+ *
+ * Denis Ciocca <denis.ciocca@st.com>
+ *
+ * Licensed under the GPL-2.
+ */
+
+#ifndef ST_SENSORS_H
+#define ST_SENSORS_H
+
+#include <linux/i2c.h>
+#include <linux/spi/spi.h>
+#include <linux/irqreturn.h>
+#include <linux/iio/trigger.h>
+#include <linux/bitops.h>
+#include <linux/regulator/consumer.h>
+
+#include <linux/platform_data/st_sensors_pdata.h>
+
+#define ST_SENSORS_TX_MAX_LENGTH		2
+#define ST_SENSORS_RX_MAX_LENGTH		6
+
+#define ST_SENSORS_ODR_LIST_MAX			10
+#define ST_SENSORS_FULLSCALE_AVL_MAX		10
+
+#define ST_SENSORS_NUMBER_ALL_CHANNELS		4
+#define ST_SENSORS_ENABLE_ALL_AXIS		0x07
+#define ST_SENSORS_SCAN_X			0
+#define ST_SENSORS_SCAN_Y			1
+#define ST_SENSORS_SCAN_Z			2
+#define ST_SENSORS_DEFAULT_POWER_ON_VALUE	0x01
+#define ST_SENSORS_DEFAULT_POWER_OFF_VALUE	0x00
+#define ST_SENSORS_DEFAULT_WAI_ADDRESS		0x0f
+#define ST_SENSORS_DEFAULT_AXIS_ADDR		0x20
+#define ST_SENSORS_DEFAULT_AXIS_MASK		0x07
+#define ST_SENSORS_DEFAULT_AXIS_N_BIT		3
+
+#define ST_SENSORS_MAX_NAME			17
+#define ST_SENSORS_MAX_4WAI			7
+
+#define ST_SENSORS_LSM_CHANNELS(device_type, mask, index, mod, \
+					ch2, s, endian, rbits, sbits, addr) \
+{ \
+	.type = device_type, \
+	.modified = mod, \
+	.info_mask_separate = mask, \
+	.info_mask_shared_by_all = BIT(IIO_CHAN_INFO_SAMP_FREQ), \
+	.scan_index = index, \
+	.channel2 = ch2, \
+	.address = addr, \
+	.scan_type = { \
+		.sign = s, \
+		.realbits = rbits, \
+		.shift = sbits - rbits, \
+		.storagebits = sbits, \
+		.endianness = endian, \
+	}, \
+}
+
+#define ST_SENSORS_DEV_ATTR_SAMP_FREQ_AVAIL() \
+		IIO_DEV_ATTR_SAMP_FREQ_AVAIL( \
+			st_sensors_sysfs_sampling_frequency_avail)
+
+#define ST_SENSORS_DEV_ATTR_SCALE_AVAIL(name) \
+		IIO_DEVICE_ATTR(name, S_IRUGO, \
+			st_sensors_sysfs_scale_avail, NULL , 0);
+
+struct st_sensor_odr_avl {
+	unsigned int hz;
+	u8 value;
+};
+
+struct st_sensor_odr {
+	u8 addr;
+	u8 mask;
+	struct st_sensor_odr_avl odr_avl[ST_SENSORS_ODR_LIST_MAX];
+};
+
+struct st_sensor_power {
+	u8 addr;
+	u8 mask;
+	u8 value_off;
+	u8 value_on;
+};
+
+struct st_sensor_axis {
+	u8 addr;
+	u8 mask;
+};
+
+struct st_sensor_fullscale_avl {
+	unsigned int num;
+	u8 value;
+	unsigned int gain;
+	unsigned int gain2;
+};
+
+struct st_sensor_fullscale {
+	u8 addr;
+	u8 mask;
+	struct st_sensor_fullscale_avl fs_avl[ST_SENSORS_FULLSCALE_AVL_MAX];
+};
+
+/**
+ * struct st_sensor_bdu - ST sensor device block data update
+ * @addr: address of the register.
+ * @mask: mask to write the block data update flag.
+ */
+struct st_sensor_bdu {
+	u8 addr;
+	u8 mask;
+};
+
+/**
+ * struct st_sensor_data_ready_irq - ST sensor device data-ready interrupt
+ * @addr: address of the register.
+ * @mask_int1: mask to enable/disable IRQ on INT1 pin.
+ * @mask_int2: mask to enable/disable IRQ on INT2 pin.
+ * struct ig1 - represents the Interrupt Generator 1 of sensors.
+ * @en_addr: address of the enable ig1 register.
+ * @en_mask: mask to write the on/off value for enable.
+ */
+struct st_sensor_data_ready_irq {
+	u8 addr;
+	u8 mask_int1;
+	u8 mask_int2;
+	struct {
+		u8 en_addr;
+		u8 en_mask;
+	} ig1;
+};
+
+/**
+ * struct st_sensor_transfer_buffer - ST sensor device I/O buffer
+ * @buf_lock: Mutex to protect rx and tx buffers.
+ * @tx_buf: Buffer used by SPI transfer function to send data to the sensors.
+ *	This buffer is used to avoid DMA not-aligned issue.
+ * @rx_buf: Buffer used by SPI transfer to receive data from sensors.
+ *	This buffer is used to avoid DMA not-aligned issue.
+ */
+struct st_sensor_transfer_buffer {
+	struct mutex buf_lock;
+	u8 rx_buf[ST_SENSORS_RX_MAX_LENGTH];
+	u8 tx_buf[ST_SENSORS_TX_MAX_LENGTH] ____cacheline_aligned;
+};
+
+/**
+ * struct st_sensor_transfer_function - ST sensor device I/O function
+ * @read_byte: Function used to read one byte.
+ * @write_byte: Function used to write one byte.
+ * @read_multiple_byte: Function used to read multiple byte.
+ */
+struct st_sensor_transfer_function {
+	int (*read_byte) (struct st_sensor_transfer_buffer *tb,
+				struct device *dev, u8 reg_addr, u8 *res_byte);
+	int (*write_byte) (struct st_sensor_transfer_buffer *tb,
+				struct device *dev, u8 reg_addr, u8 data);
+	int (*read_multiple_byte) (struct st_sensor_transfer_buffer *tb,
+		struct device *dev, u8 reg_addr, int len, u8 *data,
+							bool multiread_bit);
+};
+
+/**
+ * struct st_sensor_settings - ST specific sensor settings
+ * @wai: Contents of WhoAmI register.
+ * @sensors_supported: List of supported sensors by struct itself.
+ * @ch: IIO channels for the sensor.
+ * @odr: Output data rate register and ODR list available.
+ * @pw: Power register of the sensor.
+ * @enable_axis: Enable one or more axis of the sensor.
+ * @fs: Full scale register and full scale list available.
+ * @bdu: Block data update register.
+ * @drdy_irq: Data ready register of the sensor.
+ * @multi_read_bit: Use or not particular bit for [I2C/SPI] multi-read.
+ * @bootime: samples to discard when sensor passing from power-down to power-up.
+ */
+struct st_sensor_settings {
+	u8 wai;
+	char sensors_supported[ST_SENSORS_MAX_4WAI][ST_SENSORS_MAX_NAME];
+	struct iio_chan_spec *ch;
+	int num_ch;
+	struct st_sensor_odr odr;
+	struct st_sensor_power pw;
+	struct st_sensor_axis enable_axis;
+	struct st_sensor_fullscale fs;
+	struct st_sensor_bdu bdu;
+	struct st_sensor_data_ready_irq drdy_irq;
+	bool multi_read_bit;
+	unsigned int bootime;
+};
+
+/**
+ * struct st_sensor_data - ST sensor device status
+ * @dev: Pointer to instance of struct device (I2C or SPI).
+ * @trig: The trigger in use by the core driver.
+ * @sensor_settings: Pointer to the specific sensor settings in use.
+ * @current_fullscale: Maximum range of measure by the sensor.
+ * @vdd: Pointer to sensor's Vdd power supply
+ * @vdd_io: Pointer to sensor's Vdd-IO power supply
+ * @enabled: Status of the sensor (false->off, true->on).
+ * @multiread_bit: Use or not particular bit for [I2C/SPI] multiread.
+ * @buffer_data: Data used by buffer part.
+ * @odr: Output data rate of the sensor [Hz].
+ * num_data_channels: Number of data channels used in buffer.
+ * @drdy_int_pin: Redirect DRDY on pin 1 (1) or pin 2 (2).
+ * @get_irq_data_ready: Function to get the IRQ used for data ready signal.
+ * @tf: Transfer function structure used by I/O operations.
+ * @tb: Transfer buffers and mutex used by I/O operations.
+ */
+struct st_sensor_data {
+	struct device *dev;
+	struct iio_trigger *trig;
+	struct st_sensor_settings *sensor_settings;
+	struct st_sensor_fullscale_avl *current_fullscale;
+	struct regulator *vdd;
+	struct regulator *vdd_io;
+
+	bool enabled;
+	bool multiread_bit;
+
+	char *buffer_data;
+
+	unsigned int odr;
+	unsigned int num_data_channels;
+
+	u8 drdy_int_pin;
+
+	unsigned int (*get_irq_data_ready) (struct iio_dev *indio_dev);
+
+	const struct st_sensor_transfer_function *tf;
+	struct st_sensor_transfer_buffer tb;
+};
+
+#ifdef CONFIG_IIO_BUFFER
+irqreturn_t st_sensors_trigger_handler(int irq, void *p);
+
+int st_sensors_get_buffer_element(struct iio_dev *indio_dev, u8 *buf);
+#endif
+
+#ifdef CONFIG_IIO_TRIGGER
+int st_sensors_allocate_trigger(struct iio_dev *indio_dev,
+				const struct iio_trigger_ops *trigger_ops);
+
+void st_sensors_deallocate_trigger(struct iio_dev *indio_dev);
+
+#else
+static inline int st_sensors_allocate_trigger(struct iio_dev *indio_dev,
+				const struct iio_trigger_ops *trigger_ops)
+{
+	return 0;
+}
+static inline void st_sensors_deallocate_trigger(struct iio_dev *indio_dev)
+{
+	return;
+}
+#endif
+
+int st_sensors_init_sensor(struct iio_dev *indio_dev,
+					struct st_sensors_platform_data *pdata);
+
+int st_sensors_set_enable(struct iio_dev *indio_dev, bool enable);
+
+int st_sensors_set_axis_enable(struct iio_dev *indio_dev, u8 axis_enable);
+
+void st_sensors_power_enable(struct iio_dev *indio_dev);
+
+void st_sensors_power_disable(struct iio_dev *indio_dev);
+
+int st_sensors_set_odr(struct iio_dev *indio_dev, unsigned int odr);
+
+int st_sensors_set_dataready_irq(struct iio_dev *indio_dev, bool enable);
+
+int st_sensors_set_fullscale_by_gain(struct iio_dev *indio_dev, int scale);
+
+int st_sensors_read_info_raw(struct iio_dev *indio_dev,
+				struct iio_chan_spec const *ch, int *val);
+
+int st_sensors_check_device_support(struct iio_dev *indio_dev,
+	int num_sensors_list, const struct st_sensor_settings *sensor_settings);
+
+ssize_t st_sensors_sysfs_sampling_frequency_avail(struct device *dev,
+				struct device_attribute *attr, char *buf);
+
+ssize_t st_sensors_sysfs_scale_avail(struct device *dev,
+				struct device_attribute *attr, char *buf);
+
+#endif /* ST_SENSORS_H */
diff --git a/include/linux/iio/common/st_sensors_i2c.h b/include/linux/iio/common/st_sensors_i2c.h
new file mode 100644
index 000000000..1796af093
--- /dev/null
+++ b/include/linux/iio/common/st_sensors_i2c.h
@@ -0,0 +1,31 @@
+/*
+ * STMicroelectronics sensors i2c library driver
+ *
+ * Copyright 2012-2013 STMicroelectronics Inc.
+ *
+ * Denis Ciocca <denis.ciocca@st.com>
+ *
+ * Licensed under the GPL-2.
+ */
+
+#ifndef ST_SENSORS_I2C_H
+#define ST_SENSORS_I2C_H
+
+#include <linux/i2c.h>
+#include <linux/iio/common/st_sensors.h>
+#include <linux/of.h>
+
+void st_sensors_i2c_configure(struct iio_dev *indio_dev,
+		struct i2c_client *client, struct st_sensor_data *sdata);
+
+#ifdef CONFIG_OF
+void st_sensors_of_i2c_probe(struct i2c_client *client,
+			     const struct of_device_id *match);
+#else
+static inline void st_sensors_of_i2c_probe(struct i2c_client *client,
+					   const struct of_device_id *match)
+{
+}
+#endif
+
+#endif /* ST_SENSORS_I2C_H */
diff --git a/include/linux/iio/common/st_sensors_spi.h b/include/linux/iio/common/st_sensors_spi.h
new file mode 100644
index 000000000..d964a3563
--- /dev/null
+++ b/include/linux/iio/common/st_sensors_spi.h
@@ -0,0 +1,20 @@
+/*
+ * STMicroelectronics sensors spi library driver
+ *
+ * Copyright 2012-2013 STMicroelectronics Inc.
+ *
+ * Denis Ciocca <denis.ciocca@st.com>
+ *
+ * Licensed under the GPL-2.
+ */
+
+#ifndef ST_SENSORS_SPI_H
+#define ST_SENSORS_SPI_H
+
+#include <linux/spi/spi.h>
+#include <linux/iio/common/st_sensors.h>
+
+void st_sensors_spi_configure(struct iio_dev *indio_dev,
+			struct spi_device *spi, struct st_sensor_data *sdata);
+
+#endif /* ST_SENSORS_SPI_H */