iio:gyro: Add STMicroelectronics gyroscopes driver (7be56a8f) · Commits · e / devices / android_kernel_oneplus_sm7250

drivers/iio/gyro/Kconfig

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		@@ -30,4 +30,34 @@ config HID_SENSOR_GYRO_3D
		Say yes here to build support for the HID SENSOR
		Gyroscope 3D.

		config IIO_ST_GYRO_3AXIS
		tristate "STMicroelectronics gyroscopes 3-Axis Driver"
		depends on (I2C \|\| SPI_MASTER) && SYSFS
		select IIO_ST_SENSORS_CORE
		select IIO_ST_GYRO_I2C_3AXIS if (I2C)
		select IIO_ST_GYRO_SPI_3AXIS if (SPI_MASTER)
		select IIO_TRIGGERED_BUFFER if (IIO_BUFFER)
		select IIO_ST_GYRO_BUFFER if (IIO_TRIGGERED_BUFFER)
		help
		Say yes here to build support for STMicroelectronics gyroscopes:
		L3G4200D, LSM330DL, L3GD20, L3GD20H, LSM330DLC, L3G4IS, LSM330.

		This driver can also be built as a module. If so, will be created
		these modules:
		- st_gyro (core functions for the driver [it is mandatory]);
		- st_gyro_i2c (necessary for the I2C devices [optional*]);
		- st_gyro_spi (necessary for the SPI devices [optional*]);

		(*) one of these is necessary to do something.

		config IIO_ST_GYRO_I2C_3AXIS
		tristate
		depends on IIO_ST_GYRO_3AXIS
		depends on IIO_ST_SENSORS_I2C

		config IIO_ST_GYRO_SPI_3AXIS
		tristate
		depends on IIO_ST_GYRO_3AXIS
		depends on IIO_ST_SENSORS_SPI

		endmenu

drivers/iio/gyro/Makefile

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		@@ -5,3 +5,10 @@
		obj-$(CONFIG_ADIS16080) += adis16080.o
		obj-$(CONFIG_ADIS16136) += adis16136.o
		obj-$(CONFIG_HID_SENSOR_GYRO_3D) += hid-sensor-gyro-3d.o

		obj-$(CONFIG_IIO_ST_GYRO_3AXIS) += st_gyro.o
		st_gyro-y := st_gyro_core.o
		st_gyro-$(CONFIG_IIO_BUFFER) += st_gyro_buffer.o

		obj-$(CONFIG_IIO_ST_GYRO_I2C_3AXIS) += st_gyro_i2c.o
		obj-$(CONFIG_IIO_ST_GYRO_SPI_3AXIS) += st_gyro_spi.o

drivers/iio/gyro/st_gyro.h

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		/*
		* STMicroelectronics gyroscopes driver
		*
		* Copyright 2012-2013 STMicroelectronics Inc.
		*
		* Denis Ciocca <denis.ciocca@st.com>
		* v. 1.0.0
		* Licensed under the GPL-2.
		*/

		#ifndef ST_GYRO_H
		#define ST_GYRO_H

		#include <linux/types.h>
		#include <linux/iio/common/st_sensors.h>

		#define L3G4200D_GYRO_DEV_NAME "l3g4200d"
		#define LSM330D_GYRO_DEV_NAME "lsm330d_gyro"
		#define LSM330DL_GYRO_DEV_NAME "lsm330dl_gyro"
		#define LSM330DLC_GYRO_DEV_NAME "lsm330dlc_gyro"
		#define L3GD20_GYRO_DEV_NAME "l3gd20"
		#define L3GD20H_GYRO_DEV_NAME "l3gd20h"
		#define L3G4IS_GYRO_DEV_NAME "l3g4is_ui"
		#define LSM330_GYRO_DEV_NAME "lsm330_gyro"

		int st_gyro_common_probe(struct iio_dev *indio_dev);
		void st_gyro_common_remove(struct iio_dev *indio_dev);

		#ifdef CONFIG_IIO_BUFFER
		int st_gyro_allocate_ring(struct iio_dev *indio_dev);
		void st_gyro_deallocate_ring(struct iio_dev *indio_dev);
		int st_gyro_trig_set_state(struct iio_trigger *trig, bool state);
		#define ST_GYRO_TRIGGER_SET_STATE (&st_gyro_trig_set_state)
		#else /* CONFIG_IIO_BUFFER */
		static inline int st_gyro_allocate_ring(struct iio_dev *indio_dev)
		{
		return 0;
		}
		static inline void st_gyro_deallocate_ring(struct iio_dev *indio_dev)
		{
		}
		#define ST_GYRO_TRIGGER_SET_STATE NULL
		#endif /* CONFIG_IIO_BUFFER */

		#endif /* ST_GYRO_H */

drivers/iio/gyro/st_gyro_buffer.c

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		/*
		* STMicroelectronics gyroscopes driver
		*
		* Copyright 2012-2013 STMicroelectronics Inc.
		*
		* Denis Ciocca <denis.ciocca@st.com>
		*
		* Licensed under the GPL-2.
		*/

		#include <linux/module.h>
		#include <linux/kernel.h>
		#include <linux/slab.h>
		#include <linux/stat.h>
		#include <linux/interrupt.h>
		#include <linux/i2c.h>
		#include <linux/delay.h>
		#include <linux/iio/iio.h>
		#include <linux/iio/buffer.h>
		#include <linux/iio/trigger_consumer.h>
		#include <linux/iio/triggered_buffer.h>

		#include <linux/iio/common/st_sensors.h>
		#include "st_gyro.h"

		int st_gyro_trig_set_state(struct iio_trigger *trig, bool state)
		{
		struct iio_dev *indio_dev = trig->private_data;

		return st_sensors_set_dataready_irq(indio_dev, state);
		}

		static int st_gyro_buffer_preenable(struct iio_dev *indio_dev)
		{
		int err;

		err = st_sensors_set_enable(indio_dev, true);
		if (err < 0)
		goto st_gyro_set_enable_error;

		err = iio_sw_buffer_preenable(indio_dev);

		st_gyro_set_enable_error:
		return err;
		}

		static int st_gyro_buffer_postenable(struct iio_dev *indio_dev)
		{
		int err;
		struct st_sensor_data *gdata = iio_priv(indio_dev);

		gdata->buffer_data = kmalloc(indio_dev->scan_bytes, GFP_KERNEL);
		if (gdata->buffer_data == NULL) {
		err = -ENOMEM;
		goto allocate_memory_error;
		}

		err = st_sensors_set_axis_enable(indio_dev,
		(u8)indio_dev->active_scan_mask[0]);
		if (err < 0)
		goto st_gyro_buffer_postenable_error;

		err = iio_triggered_buffer_postenable(indio_dev);
		if (err < 0)
		goto st_gyro_buffer_postenable_error;

		return err;

		st_gyro_buffer_postenable_error:
		kfree(gdata->buffer_data);
		allocate_memory_error:
		return err;
		}

		static int st_gyro_buffer_predisable(struct iio_dev *indio_dev)
		{
		int err;
		struct st_sensor_data *gdata = iio_priv(indio_dev);

		err = iio_triggered_buffer_predisable(indio_dev);
		if (err < 0)
		goto st_gyro_buffer_predisable_error;

		err = st_sensors_set_axis_enable(indio_dev, ST_SENSORS_ENABLE_ALL_AXIS);
		if (err < 0)
		goto st_gyro_buffer_predisable_error;

		err = st_sensors_set_enable(indio_dev, false);

		st_gyro_buffer_predisable_error:
		kfree(gdata->buffer_data);
		return err;
		}

		static const struct iio_buffer_setup_ops st_gyro_buffer_setup_ops = {
		.preenable = &st_gyro_buffer_preenable,
		.postenable = &st_gyro_buffer_postenable,
		.predisable = &st_gyro_buffer_predisable,
		};

		int st_gyro_allocate_ring(struct iio_dev *indio_dev)
		{
		return iio_triggered_buffer_setup(indio_dev, &iio_pollfunc_store_time,
		&st_sensors_trigger_handler, &st_gyro_buffer_setup_ops);
		}

		void st_gyro_deallocate_ring(struct iio_dev *indio_dev)
		{
		iio_triggered_buffer_cleanup(indio_dev);
		}

		MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>");
		MODULE_DESCRIPTION("STMicroelectronics gyroscopes buffer");
		MODULE_LICENSE("GPL v2");

drivers/iio/gyro/st_gyro_core.c

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		/*
		* STMicroelectronics gyroscopes driver
		*
		* Copyright 2012-2013 STMicroelectronics Inc.
		*
		* Denis Ciocca <denis.ciocca@st.com>
		*
		* Licensed under the GPL-2.
		*/

		#include <linux/kernel.h>
		#include <linux/module.h>
		#include <linux/slab.h>
		#include <linux/errno.h>
		#include <linux/types.h>
		#include <linux/mutex.h>
		#include <linux/interrupt.h>
		#include <linux/i2c.h>
		#include <linux/gpio.h>
		#include <linux/irq.h>
		#include <linux/delay.h>
		#include <linux/iio/iio.h>
		#include <linux/iio/sysfs.h>
		#include <linux/iio/trigger_consumer.h>
		#include <linux/iio/buffer.h>

		#include <linux/iio/common/st_sensors.h>
		#include "st_gyro.h"

		/* DEFAULT VALUE FOR SENSORS */
		#define ST_GYRO_DEFAULT_OUT_X_L_ADDR 0x28
		#define ST_GYRO_DEFAULT_OUT_Y_L_ADDR 0x2a
		#define ST_GYRO_DEFAULT_OUT_Z_L_ADDR 0x2c

		/* FULLSCALE */
		#define ST_GYRO_FS_AVL_250DPS 250
		#define ST_GYRO_FS_AVL_500DPS 500
		#define ST_GYRO_FS_AVL_2000DPS 2000

		/* CUSTOM VALUES FOR SENSOR 1 */
		#define ST_GYRO_1_WAI_EXP 0xd3
		#define ST_GYRO_1_ODR_ADDR 0x20
		#define ST_GYRO_1_ODR_MASK 0xc0
		#define ST_GYRO_1_ODR_AVL_100HZ_VAL 0x00
		#define ST_GYRO_1_ODR_AVL_200HZ_VAL 0x01
		#define ST_GYRO_1_ODR_AVL_400HZ_VAL 0x02
		#define ST_GYRO_1_ODR_AVL_800HZ_VAL 0x03
		#define ST_GYRO_1_PW_ADDR 0x20
		#define ST_GYRO_1_PW_MASK 0x08
		#define ST_GYRO_1_FS_ADDR 0x23
		#define ST_GYRO_1_FS_MASK 0x30
		#define ST_GYRO_1_FS_AVL_250_VAL 0x00
		#define ST_GYRO_1_FS_AVL_500_VAL 0x01
		#define ST_GYRO_1_FS_AVL_2000_VAL 0x02
		#define ST_GYRO_1_FS_AVL_250_GAIN IIO_DEGREE_TO_RAD(8750)
		#define ST_GYRO_1_FS_AVL_500_GAIN IIO_DEGREE_TO_RAD(17500)
		#define ST_GYRO_1_FS_AVL_2000_GAIN IIO_DEGREE_TO_RAD(70000)
		#define ST_GYRO_1_BDU_ADDR 0x23
		#define ST_GYRO_1_BDU_MASK 0x80
		#define ST_GYRO_1_DRDY_IRQ_ADDR 0x22
		#define ST_GYRO_1_DRDY_IRQ_MASK 0x08
		#define ST_GYRO_1_MULTIREAD_BIT true

		/* CUSTOM VALUES FOR SENSOR 2 */
		#define ST_GYRO_2_WAI_EXP 0xd4
		#define ST_GYRO_2_ODR_ADDR 0x20
		#define ST_GYRO_2_ODR_MASK 0xc0
		#define ST_GYRO_2_ODR_AVL_95HZ_VAL 0x00
		#define ST_GYRO_2_ODR_AVL_190HZ_VAL 0x01
		#define ST_GYRO_2_ODR_AVL_380HZ_VAL 0x02
		#define ST_GYRO_2_ODR_AVL_760HZ_VAL 0x03
		#define ST_GYRO_2_PW_ADDR 0x20
		#define ST_GYRO_2_PW_MASK 0x08
		#define ST_GYRO_2_FS_ADDR 0x23
		#define ST_GYRO_2_FS_MASK 0x30
		#define ST_GYRO_2_FS_AVL_250_VAL 0x00
		#define ST_GYRO_2_FS_AVL_500_VAL 0x01
		#define ST_GYRO_2_FS_AVL_2000_VAL 0x02
		#define ST_GYRO_2_FS_AVL_250_GAIN IIO_DEGREE_TO_RAD(8750)
		#define ST_GYRO_2_FS_AVL_500_GAIN IIO_DEGREE_TO_RAD(17500)
		#define ST_GYRO_2_FS_AVL_2000_GAIN IIO_DEGREE_TO_RAD(70000)
		#define ST_GYRO_2_BDU_ADDR 0x23
		#define ST_GYRO_2_BDU_MASK 0x80
		#define ST_GYRO_2_DRDY_IRQ_ADDR 0x22
		#define ST_GYRO_2_DRDY_IRQ_MASK 0x08
		#define ST_GYRO_2_MULTIREAD_BIT true

		static const struct iio_chan_spec st_gyro_16bit_channels[] = {
		ST_SENSORS_LSM_CHANNELS(IIO_ANGL_VEL, ST_SENSORS_SCAN_X,
		IIO_MOD_X, IIO_LE, ST_SENSORS_DEFAULT_16_REALBITS,
		ST_GYRO_DEFAULT_OUT_X_L_ADDR),
		ST_SENSORS_LSM_CHANNELS(IIO_ANGL_VEL, ST_SENSORS_SCAN_Y,
		IIO_MOD_Y, IIO_LE, ST_SENSORS_DEFAULT_16_REALBITS,
		ST_GYRO_DEFAULT_OUT_Y_L_ADDR),
		ST_SENSORS_LSM_CHANNELS(IIO_ANGL_VEL, ST_SENSORS_SCAN_Z,
		IIO_MOD_Z, IIO_LE, ST_SENSORS_DEFAULT_16_REALBITS,
		ST_GYRO_DEFAULT_OUT_Z_L_ADDR),
		IIO_CHAN_SOFT_TIMESTAMP(3)
		};

		static const struct st_sensors st_gyro_sensors[] = {
		{
		.wai = ST_GYRO_1_WAI_EXP,
		.sensors_supported = {
		[0] = L3G4200D_GYRO_DEV_NAME,
		[1] = LSM330DL_GYRO_DEV_NAME,
		},
		.ch = (struct iio_chan_spec *)st_gyro_16bit_channels,
		.odr = {
		.addr = ST_GYRO_1_ODR_ADDR,
		.mask = ST_GYRO_1_ODR_MASK,
		.odr_avl = {
		{ 100, ST_GYRO_1_ODR_AVL_100HZ_VAL, },
		{ 200, ST_GYRO_1_ODR_AVL_200HZ_VAL, },
		{ 400, ST_GYRO_1_ODR_AVL_400HZ_VAL, },
		{ 800, ST_GYRO_1_ODR_AVL_800HZ_VAL, },
		},
		},
		.pw = {
		.addr = ST_GYRO_1_PW_ADDR,
		.mask = ST_GYRO_1_PW_MASK,
		.value_on = ST_SENSORS_DEFAULT_POWER_ON_VALUE,
		.value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
		},
		.enable_axis = {
		.addr = ST_SENSORS_DEFAULT_AXIS_ADDR,
		.mask = ST_SENSORS_DEFAULT_AXIS_MASK,
		},
		.fs = {
		.addr = ST_GYRO_1_FS_ADDR,
		.mask = ST_GYRO_1_FS_MASK,
		.fs_avl = {
		[0] = {
		.num = ST_GYRO_FS_AVL_250DPS,
		.value = ST_GYRO_1_FS_AVL_250_VAL,
		.gain = ST_GYRO_1_FS_AVL_250_GAIN,
		},
		[1] = {
		.num = ST_GYRO_FS_AVL_500DPS,
		.value = ST_GYRO_1_FS_AVL_500_VAL,
		.gain = ST_GYRO_1_FS_AVL_500_GAIN,
		},
		[2] = {
		.num = ST_GYRO_FS_AVL_2000DPS,
		.value = ST_GYRO_1_FS_AVL_2000_VAL,
		.gain = ST_GYRO_1_FS_AVL_2000_GAIN,
		},
		},
		},
		.bdu = {
		.addr = ST_GYRO_1_BDU_ADDR,
		.mask = ST_GYRO_1_BDU_MASK,
		},
		.drdy_irq = {
		.addr = ST_GYRO_1_DRDY_IRQ_ADDR,
		.mask = ST_GYRO_1_DRDY_IRQ_MASK,
		},
		.multi_read_bit = ST_GYRO_1_MULTIREAD_BIT,
		.bootime = 2,
		},
		{
		.wai = ST_GYRO_2_WAI_EXP,
		.sensors_supported = {
		[0] = L3GD20_GYRO_DEV_NAME,
		[1] = L3GD20H_GYRO_DEV_NAME,
		[2] = LSM330D_GYRO_DEV_NAME,
		[3] = LSM330DLC_GYRO_DEV_NAME,
		[4] = L3G4IS_GYRO_DEV_NAME,
		[5] = LSM330_GYRO_DEV_NAME,
		},
		.ch = (struct iio_chan_spec *)st_gyro_16bit_channels,
		.odr = {
		.addr = ST_GYRO_2_ODR_ADDR,
		.mask = ST_GYRO_2_ODR_MASK,
		.odr_avl = {
		{ 95, ST_GYRO_2_ODR_AVL_95HZ_VAL, },
		{ 190, ST_GYRO_2_ODR_AVL_190HZ_VAL, },
		{ 380, ST_GYRO_2_ODR_AVL_380HZ_VAL, },
		{ 760, ST_GYRO_2_ODR_AVL_760HZ_VAL, },
		},
		},
		.pw = {
		.addr = ST_GYRO_2_PW_ADDR,
		.mask = ST_GYRO_2_PW_MASK,
		.value_on = ST_SENSORS_DEFAULT_POWER_ON_VALUE,
		.value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
		},
		.enable_axis = {
		.addr = ST_SENSORS_DEFAULT_AXIS_ADDR,
		.mask = ST_SENSORS_DEFAULT_AXIS_MASK,
		},
		.fs = {
		.addr = ST_GYRO_2_FS_ADDR,
		.mask = ST_GYRO_2_FS_MASK,
		.fs_avl = {
		[0] = {
		.num = ST_GYRO_FS_AVL_250DPS,
		.value = ST_GYRO_2_FS_AVL_250_VAL,
		.gain = ST_GYRO_2_FS_AVL_250_GAIN,
		},
		[1] = {
		.num = ST_GYRO_FS_AVL_500DPS,
		.value = ST_GYRO_2_FS_AVL_500_VAL,
		.gain = ST_GYRO_2_FS_AVL_500_GAIN,
		},
		[2] = {
		.num = ST_GYRO_FS_AVL_2000DPS,
		.value = ST_GYRO_2_FS_AVL_2000_VAL,
		.gain = ST_GYRO_2_FS_AVL_2000_GAIN,
		},
		},
		},
		.bdu = {
		.addr = ST_GYRO_2_BDU_ADDR,
		.mask = ST_GYRO_2_BDU_MASK,
		},
		.drdy_irq = {
		.addr = ST_GYRO_2_DRDY_IRQ_ADDR,
		.mask = ST_GYRO_2_DRDY_IRQ_MASK,
		},
		.multi_read_bit = ST_GYRO_2_MULTIREAD_BIT,
		.bootime = 2,
		},
		};

		static int st_gyro_read_raw(struct iio_dev *indio_dev,
		struct iio_chan_spec const ch, int val,
		int *val2, long mask)
		{
		int err;
		struct st_sensor_data *gdata = iio_priv(indio_dev);

		switch (mask) {
		case IIO_CHAN_INFO_RAW:
		err = st_sensors_read_info_raw(indio_dev, ch, val);
		if (err < 0)
		goto read_error;

		return IIO_VAL_INT;
		case IIO_CHAN_INFO_SCALE:
		*val = 0;
		*val2 = gdata->current_fullscale->gain;
		return IIO_VAL_INT_PLUS_MICRO;
		default:
		return -EINVAL;
		}

		read_error:
		return err;
		}

		static int st_gyro_write_raw(struct iio_dev *indio_dev,
		struct iio_chan_spec const *chan, int val, int val2, long mask)
		{
		int err;

		switch (mask) {
		case IIO_CHAN_INFO_SCALE:
		err = st_sensors_set_fullscale_by_gain(indio_dev, val2);
		break;
		default:
		err = -EINVAL;
		}

		return err;
		}

		static ST_SENSOR_DEV_ATTR_SAMP_FREQ();
		static ST_SENSORS_DEV_ATTR_SAMP_FREQ_AVAIL();
		static ST_SENSORS_DEV_ATTR_SCALE_AVAIL(in_anglvel_scale_available);

		static struct attribute *st_gyro_attributes[] = {
		&iio_dev_attr_sampling_frequency_available.dev_attr.attr,
		&iio_dev_attr_in_anglvel_scale_available.dev_attr.attr,
		&iio_dev_attr_sampling_frequency.dev_attr.attr,
		NULL,
		};

		static const struct attribute_group st_gyro_attribute_group = {
		.attrs = st_gyro_attributes,
		};

		static const struct iio_info gyro_info = {
		.driver_module = THIS_MODULE,
		.attrs = &st_gyro_attribute_group,
		.read_raw = &st_gyro_read_raw,
		.write_raw = &st_gyro_write_raw,
		};

		static const struct iio_trigger_ops st_gyro_trigger_ops = {
		.owner = THIS_MODULE,
		.set_trigger_state = ST_GYRO_TRIGGER_SET_STATE,
		};

		int st_gyro_common_probe(struct iio_dev *indio_dev)
		{
		int err;
		struct st_sensor_data *gdata = iio_priv(indio_dev);

		indio_dev->modes = INDIO_DIRECT_MODE;
		indio_dev->info = &gyro_info;

		err = st_sensors_check_device_support(indio_dev,
		ARRAY_SIZE(st_gyro_sensors), st_gyro_sensors);
		if (err < 0)
		goto st_gyro_common_probe_error;

		gdata->multiread_bit = gdata->sensor->multi_read_bit;
		indio_dev->channels = gdata->sensor->ch;
		indio_dev->num_channels = ST_SENSORS_NUMBER_ALL_CHANNELS;

		gdata->current_fullscale = (struct st_sensor_fullscale_avl *)
		&gdata->sensor->fs.fs_avl[0];
		gdata->odr = gdata->sensor->odr.odr_avl[0].hz;

		err = st_sensors_init_sensor(indio_dev);
		if (err < 0)
		goto st_gyro_common_probe_error;

		if (gdata->get_irq_data_ready(indio_dev) > 0) {
		err = st_gyro_allocate_ring(indio_dev);
		if (err < 0)
		goto st_gyro_common_probe_error;

		err = st_sensors_allocate_trigger(indio_dev,
		&st_gyro_trigger_ops);
		if (err < 0)
		goto st_gyro_probe_trigger_error;
		}

		err = iio_device_register(indio_dev);
		if (err)
		goto st_gyro_device_register_error;

		return err;

		st_gyro_device_register_error:
		if (gdata->get_irq_data_ready(indio_dev) > 0)
		st_sensors_deallocate_trigger(indio_dev);
		st_gyro_probe_trigger_error:
		if (gdata->get_irq_data_ready(indio_dev) > 0)
		st_gyro_deallocate_ring(indio_dev);
		st_gyro_common_probe_error:
		return err;
		}
		EXPORT_SYMBOL(st_gyro_common_probe);

		void st_gyro_common_remove(struct iio_dev *indio_dev)
		{
		struct st_sensor_data *gdata = iio_priv(indio_dev);

		iio_device_unregister(indio_dev);
		if (gdata->get_irq_data_ready(indio_dev) > 0) {
		st_sensors_deallocate_trigger(indio_dev);
		st_gyro_deallocate_ring(indio_dev);
		}
		iio_device_free(indio_dev);
		}
		EXPORT_SYMBOL(st_gyro_common_remove);

		MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>");
		MODULE_DESCRIPTION("STMicroelectronics gyroscopes driver");
		MODULE_LICENSE("GPL v2");