[mirror_ubuntu-artful-kernel.git] / drivers / iio / pressure / st_pressure_core.c

/*
 * STMicroelectronics pressures driver
 *
 * Copyright 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.h>
#include <linux/iio/buffer.h>
#include <asm/unaligned.h>

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

#define ST_PRESS_LSB_PER_MBAR			4096UL
#define ST_PRESS_KPASCAL_NANO_SCALE		(100000000UL / \
						 ST_PRESS_LSB_PER_MBAR)
#define ST_PRESS_LSB_PER_CELSIUS		480UL
#define ST_PRESS_CELSIUS_NANO_SCALE		(1000000000UL / \
						 ST_PRESS_LSB_PER_CELSIUS)
#define ST_PRESS_NUMBER_DATA_CHANNELS		1

/* FULLSCALE */
#define ST_PRESS_FS_AVL_1260MB			1260

#define ST_PRESS_1_OUT_XL_ADDR			0x28
#define ST_TEMP_1_OUT_L_ADDR			0x2b

/* CUSTOM VALUES FOR LPS331AP SENSOR */
#define ST_PRESS_LPS331AP_WAI_EXP		0xbb
#define ST_PRESS_LPS331AP_ODR_ADDR		0x20
#define ST_PRESS_LPS331AP_ODR_MASK		0x70
#define ST_PRESS_LPS331AP_ODR_AVL_1HZ_VAL	0x01
#define ST_PRESS_LPS331AP_ODR_AVL_7HZ_VAL	0x05
#define ST_PRESS_LPS331AP_ODR_AVL_13HZ_VAL	0x06
#define ST_PRESS_LPS331AP_ODR_AVL_25HZ_VAL	0x07
#define ST_PRESS_LPS331AP_PW_ADDR		0x20
#define ST_PRESS_LPS331AP_PW_MASK		0x80
#define ST_PRESS_LPS331AP_FS_ADDR		0x23
#define ST_PRESS_LPS331AP_FS_MASK		0x30
#define ST_PRESS_LPS331AP_FS_AVL_1260_VAL	0x00
#define ST_PRESS_LPS331AP_FS_AVL_1260_GAIN	ST_PRESS_KPASCAL_NANO_SCALE
#define ST_PRESS_LPS331AP_FS_AVL_TEMP_GAIN	ST_PRESS_CELSIUS_NANO_SCALE
#define ST_PRESS_LPS331AP_BDU_ADDR		0x20
#define ST_PRESS_LPS331AP_BDU_MASK		0x04
#define ST_PRESS_LPS331AP_DRDY_IRQ_ADDR		0x22
#define ST_PRESS_LPS331AP_DRDY_IRQ_INT1_MASK	0x04
#define ST_PRESS_LPS331AP_DRDY_IRQ_INT2_MASK	0x20
#define ST_PRESS_LPS331AP_MULTIREAD_BIT		true
#define ST_PRESS_LPS331AP_TEMP_OFFSET		42500

/* CUSTOM VALUES FOR LPS001WP SENSOR */
#define ST_PRESS_LPS001WP_WAI_EXP		0xba
#define ST_PRESS_LPS001WP_ODR_ADDR		0x20
#define ST_PRESS_LPS001WP_ODR_MASK		0x30
#define ST_PRESS_LPS001WP_ODR_AVL_1HZ_VAL	0x01
#define ST_PRESS_LPS001WP_ODR_AVL_7HZ_VAL	0x02
#define ST_PRESS_LPS001WP_ODR_AVL_13HZ_VAL	0x03
#define ST_PRESS_LPS001WP_PW_ADDR		0x20
#define ST_PRESS_LPS001WP_PW_MASK		0x40
#define ST_PRESS_LPS001WP_BDU_ADDR		0x20
#define ST_PRESS_LPS001WP_BDU_MASK		0x04
#define ST_PRESS_LPS001WP_MULTIREAD_BIT		true
#define ST_PRESS_LPS001WP_OUT_L_ADDR		0x28
#define ST_TEMP_LPS001WP_OUT_L_ADDR		0x2a

/* CUSTOM VALUES FOR LPS25H SENSOR */
#define ST_PRESS_LPS25H_WAI_EXP			0xbd
#define ST_PRESS_LPS25H_ODR_ADDR		0x20
#define ST_PRESS_LPS25H_ODR_MASK		0x70
#define ST_PRESS_LPS25H_ODR_AVL_1HZ_VAL		0x01
#define ST_PRESS_LPS25H_ODR_AVL_7HZ_VAL		0x02
#define ST_PRESS_LPS25H_ODR_AVL_13HZ_VAL	0x03
#define ST_PRESS_LPS25H_ODR_AVL_25HZ_VAL	0x04
#define ST_PRESS_LPS25H_PW_ADDR			0x20
#define ST_PRESS_LPS25H_PW_MASK			0x80
#define ST_PRESS_LPS25H_FS_ADDR			0x00
#define ST_PRESS_LPS25H_FS_MASK			0x00
#define ST_PRESS_LPS25H_FS_AVL_1260_VAL		0x00
#define ST_PRESS_LPS25H_FS_AVL_1260_GAIN	ST_PRESS_KPASCAL_NANO_SCALE
#define ST_PRESS_LPS25H_FS_AVL_TEMP_GAIN	ST_PRESS_CELSIUS_NANO_SCALE
#define ST_PRESS_LPS25H_BDU_ADDR		0x20
#define ST_PRESS_LPS25H_BDU_MASK		0x04
#define ST_PRESS_LPS25H_DRDY_IRQ_ADDR		0x23
#define ST_PRESS_LPS25H_DRDY_IRQ_INT1_MASK	0x01
#define ST_PRESS_LPS25H_DRDY_IRQ_INT2_MASK	0x10
#define ST_PRESS_LPS25H_MULTIREAD_BIT		true
#define ST_PRESS_LPS25H_TEMP_OFFSET		42500
#define ST_PRESS_LPS25H_OUT_XL_ADDR		0x28
#define ST_TEMP_LPS25H_OUT_L_ADDR		0x2b

static const struct iio_chan_spec st_press_1_channels[] = {
	{
		.type = IIO_PRESSURE,
		.channel2 = IIO_NO_MOD,
		.address = ST_PRESS_1_OUT_XL_ADDR,
		.scan_index = ST_SENSORS_SCAN_X,
		.scan_type = {
			.sign = 'u',
			.realbits = 24,
			.storagebits = 24,
			.endianness = IIO_LE,
		},
		.info_mask_separate =
			BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
		.modified = 0,
	},
	{
		.type = IIO_TEMP,
		.channel2 = IIO_NO_MOD,
		.address = ST_TEMP_1_OUT_L_ADDR,
		.scan_index = -1,
		.scan_type = {
			.sign = 'u',
			.realbits = 16,
			.storagebits = 16,
			.endianness = IIO_LE,
		},
		.info_mask_separate =
			BIT(IIO_CHAN_INFO_RAW) |
			BIT(IIO_CHAN_INFO_SCALE) |
			BIT(IIO_CHAN_INFO_OFFSET),
		.modified = 0,
	},
	IIO_CHAN_SOFT_TIMESTAMP(1)
};

static const struct iio_chan_spec st_press_lps001wp_channels[] = {
	{
		.type = IIO_PRESSURE,
		.channel2 = IIO_NO_MOD,
		.address = ST_PRESS_LPS001WP_OUT_L_ADDR,
		.scan_index = ST_SENSORS_SCAN_X,
		.scan_type = {
			.sign = 'u',
			.realbits = 16,
			.storagebits = 16,
			.endianness = IIO_LE,
		},
		.info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
		.modified = 0,
	},
	{
		.type = IIO_TEMP,
		.channel2 = IIO_NO_MOD,
		.address = ST_TEMP_LPS001WP_OUT_L_ADDR,
		.scan_index = -1,
		.scan_type = {
			.sign = 'u',
			.realbits = 16,
			.storagebits = 16,
			.endianness = IIO_LE,
		},
		.info_mask_separate =
			BIT(IIO_CHAN_INFO_RAW) |
			BIT(IIO_CHAN_INFO_OFFSET),
		.modified = 0,
	},
	IIO_CHAN_SOFT_TIMESTAMP(1)
};

static const struct st_sensor_settings st_press_sensors_settings[] = {
	{
		.wai = ST_PRESS_LPS331AP_WAI_EXP,
		.sensors_supported = {
			[0] = LPS331AP_PRESS_DEV_NAME,
		},
		.ch = (struct iio_chan_spec *)st_press_1_channels,
		.num_ch = ARRAY_SIZE(st_press_1_channels),
		.odr = {
			.addr = ST_PRESS_LPS331AP_ODR_ADDR,
			.mask = ST_PRESS_LPS331AP_ODR_MASK,
			.odr_avl = {
				{ 1, ST_PRESS_LPS331AP_ODR_AVL_1HZ_VAL, },
				{ 7, ST_PRESS_LPS331AP_ODR_AVL_7HZ_VAL, },
				{ 13, ST_PRESS_LPS331AP_ODR_AVL_13HZ_VAL, },
				{ 25, ST_PRESS_LPS331AP_ODR_AVL_25HZ_VAL, },
			},
		},
		.pw = {
			.addr = ST_PRESS_LPS331AP_PW_ADDR,
			.mask = ST_PRESS_LPS331AP_PW_MASK,
			.value_on = ST_SENSORS_DEFAULT_POWER_ON_VALUE,
			.value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
		},
		.fs = {
			.addr = ST_PRESS_LPS331AP_FS_ADDR,
			.mask = ST_PRESS_LPS331AP_FS_MASK,
			.fs_avl = {
				[0] = {
					.num = ST_PRESS_FS_AVL_1260MB,
					.value = ST_PRESS_LPS331AP_FS_AVL_1260_VAL,
					.gain = ST_PRESS_LPS331AP_FS_AVL_1260_GAIN,
					.gain2 = ST_PRESS_LPS331AP_FS_AVL_TEMP_GAIN,
				},
			},
		},
		.bdu = {
			.addr = ST_PRESS_LPS331AP_BDU_ADDR,
			.mask = ST_PRESS_LPS331AP_BDU_MASK,
		},
		.drdy_irq = {
			.addr = ST_PRESS_LPS331AP_DRDY_IRQ_ADDR,
			.mask_int1 = ST_PRESS_LPS331AP_DRDY_IRQ_INT1_MASK,
			.mask_int2 = ST_PRESS_LPS331AP_DRDY_IRQ_INT2_MASK,
		},
		.multi_read_bit = ST_PRESS_LPS331AP_MULTIREAD_BIT,
		.bootime = 2,
	},
	{
		.wai = ST_PRESS_LPS001WP_WAI_EXP,
		.sensors_supported = {
			[0] = LPS001WP_PRESS_DEV_NAME,
		},
		.ch = (struct iio_chan_spec *)st_press_lps001wp_channels,
		.num_ch = ARRAY_SIZE(st_press_lps001wp_channels),
		.odr = {
			.addr = ST_PRESS_LPS001WP_ODR_ADDR,
			.mask = ST_PRESS_LPS001WP_ODR_MASK,
			.odr_avl = {
				{ 1, ST_PRESS_LPS001WP_ODR_AVL_1HZ_VAL, },
				{ 7, ST_PRESS_LPS001WP_ODR_AVL_7HZ_VAL, },
				{ 13, ST_PRESS_LPS001WP_ODR_AVL_13HZ_VAL, },
			},
		},
		.pw = {
			.addr = ST_PRESS_LPS001WP_PW_ADDR,
			.mask = ST_PRESS_LPS001WP_PW_MASK,
			.value_on = ST_SENSORS_DEFAULT_POWER_ON_VALUE,
			.value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
		},
		.fs = {
			.addr = 0,
		},
		.bdu = {
			.addr = ST_PRESS_LPS001WP_BDU_ADDR,
			.mask = ST_PRESS_LPS001WP_BDU_MASK,
		},
		.drdy_irq = {
			.addr = 0,
		},
		.multi_read_bit = ST_PRESS_LPS001WP_MULTIREAD_BIT,
		.bootime = 2,
	},
	{
		.wai = ST_PRESS_LPS25H_WAI_EXP,
		.sensors_supported = {
			[0] = LPS25H_PRESS_DEV_NAME,
		},
		.ch = (struct iio_chan_spec *)st_press_1_channels,
		.num_ch = ARRAY_SIZE(st_press_1_channels),
		.odr = {
			.addr = ST_PRESS_LPS25H_ODR_ADDR,
			.mask = ST_PRESS_LPS25H_ODR_MASK,
			.odr_avl = {
				{ 1, ST_PRESS_LPS25H_ODR_AVL_1HZ_VAL, },
				{ 7, ST_PRESS_LPS25H_ODR_AVL_7HZ_VAL, },
				{ 13, ST_PRESS_LPS25H_ODR_AVL_13HZ_VAL, },
				{ 25, ST_PRESS_LPS25H_ODR_AVL_25HZ_VAL, },
			},
		},
		.pw = {
			.addr = ST_PRESS_LPS25H_PW_ADDR,
			.mask = ST_PRESS_LPS25H_PW_MASK,
			.value_on = ST_SENSORS_DEFAULT_POWER_ON_VALUE,
			.value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
		},
		.fs = {
			.addr = ST_PRESS_LPS25H_FS_ADDR,
			.mask = ST_PRESS_LPS25H_FS_MASK,
			.fs_avl = {
				[0] = {
					.num = ST_PRESS_FS_AVL_1260MB,
					.value = ST_PRESS_LPS25H_FS_AVL_1260_VAL,
					.gain = ST_PRESS_LPS25H_FS_AVL_1260_GAIN,
					.gain2 = ST_PRESS_LPS25H_FS_AVL_TEMP_GAIN,
				},
			},
		},
		.bdu = {
			.addr = ST_PRESS_LPS25H_BDU_ADDR,
			.mask = ST_PRESS_LPS25H_BDU_MASK,
		},
		.drdy_irq = {
			.addr = ST_PRESS_LPS25H_DRDY_IRQ_ADDR,
			.mask_int1 = ST_PRESS_LPS25H_DRDY_IRQ_INT1_MASK,
			.mask_int2 = ST_PRESS_LPS25H_DRDY_IRQ_INT2_MASK,
		},
		.multi_read_bit = ST_PRESS_LPS25H_MULTIREAD_BIT,
		.bootime = 2,
	},
};

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

	switch (mask) {
	case IIO_CHAN_INFO_SAMP_FREQ:
		if (val2)
			return -EINVAL;
		mutex_lock(&indio_dev->mlock);
		err = st_sensors_set_odr(indio_dev, val);
		mutex_unlock(&indio_dev->mlock);
		return err;
	default:
		return -EINVAL;
	}
}

static int st_press_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 *pdata = 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;

		switch (ch->type) {
		case IIO_PRESSURE:
			*val2 = pdata->current_fullscale->gain;
			break;
		case IIO_TEMP:
			*val2 = pdata->current_fullscale->gain2;
			break;
		default:
			err = -EINVAL;
			goto read_error;
		}

		return IIO_VAL_INT_PLUS_NANO;
	case IIO_CHAN_INFO_OFFSET:
		switch (ch->type) {
		case IIO_TEMP:
			*val = 425;
			*val2 = 10;
			break;
		default:
			err = -EINVAL;
			goto read_error;
		}

		return IIO_VAL_FRACTIONAL;
	case IIO_CHAN_INFO_SAMP_FREQ:
		*val = pdata->odr;
		return IIO_VAL_INT;
	default:
		return -EINVAL;
	}

read_error:
	return err;
}

static ST_SENSORS_DEV_ATTR_SAMP_FREQ_AVAIL();

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

static const struct attribute_group st_press_attribute_group = {
	.attrs = st_press_attributes,
};

static const struct iio_info press_info = {
	.driver_module = THIS_MODULE,
	.attrs = &st_press_attribute_group,
	.read_raw = &st_press_read_raw,
	.write_raw = &st_press_write_raw,
};

#ifdef CONFIG_IIO_TRIGGER
static const struct iio_trigger_ops st_press_trigger_ops = {
	.owner = THIS_MODULE,
	.set_trigger_state = ST_PRESS_TRIGGER_SET_STATE,
};
#define ST_PRESS_TRIGGER_OPS (&st_press_trigger_ops)
#else
#define ST_PRESS_TRIGGER_OPS NULL
#endif

int st_press_common_probe(struct iio_dev *indio_dev,
				struct st_sensors_platform_data *plat_data)
{
	struct st_sensor_data *pdata = iio_priv(indio_dev);
	int irq = pdata->get_irq_data_ready(indio_dev);
	int err;

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

	st_sensors_power_enable(indio_dev);

	err = st_sensors_check_device_support(indio_dev,
					ARRAY_SIZE(st_press_sensors_settings),
					st_press_sensors_settings);
	if (err < 0)
		return err;

	pdata->num_data_channels = ST_PRESS_NUMBER_DATA_CHANNELS;
	pdata->multiread_bit = pdata->sensor_settings->multi_read_bit;
	indio_dev->channels = pdata->sensor_settings->ch;
	indio_dev->num_channels = pdata->sensor_settings->num_ch;

	if (pdata->sensor_settings->fs.addr != 0)
		pdata->current_fullscale = (struct st_sensor_fullscale_avl *)
			&pdata->sensor_settings->fs.fs_avl[0];

	pdata->odr = pdata->sensor_settings->odr.odr_avl[0].hz;

	/* Some devices don't support a data ready pin. */
	if (!plat_data && pdata->sensor_settings->drdy_irq.addr)
		plat_data =
			(struct st_sensors_platform_data *)&default_press_pdata;

	err = st_sensors_init_sensor(indio_dev, plat_data);
	if (err < 0)
		return err;

	err = st_press_allocate_ring(indio_dev);
	if (err < 0)
		return err;

	if (irq > 0) {
		err = st_sensors_allocate_trigger(indio_dev,
						  ST_PRESS_TRIGGER_OPS);
		if (err < 0)
			goto st_press_probe_trigger_error;
	}

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

	dev_info(&indio_dev->dev, "registered pressure sensor %s\n",
		 indio_dev->name);

	return err;

st_press_device_register_error:
	if (irq > 0)
		st_sensors_deallocate_trigger(indio_dev);
st_press_probe_trigger_error:
	st_press_deallocate_ring(indio_dev);

	return err;
}
EXPORT_SYMBOL(st_press_common_probe);

void st_press_common_remove(struct iio_dev *indio_dev)
{
	struct st_sensor_data *pdata = iio_priv(indio_dev);

	st_sensors_power_disable(indio_dev);

	iio_device_unregister(indio_dev);
	if (pdata->get_irq_data_ready(indio_dev) > 0)
		st_sensors_deallocate_trigger(indio_dev);

	st_press_deallocate_ring(indio_dev);
}
EXPORT_SYMBOL(st_press_common_remove);

MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>");
MODULE_DESCRIPTION("STMicroelectronics pressures driver");
MODULE_LICENSE("GPL v2");
Commit	Line	Data
217494e5 DC	1	/*
	2	* STMicroelectronics pressures driver
	3	*
	4	* Copyright 2013 STMicroelectronics Inc.
	5	*
	6	* Denis Ciocca <denis.ciocca@st.com>
	7	*
	8	* Licensed under the GPL-2.
	9	*/
	10
	11	#include <linux/kernel.h>
	12	#include <linux/module.h>
	13	#include <linux/slab.h>
	14	#include <linux/errno.h>
	15	#include <linux/types.h>
	16	#include <linux/mutex.h>
	17	#include <linux/interrupt.h>
	18	#include <linux/i2c.h>
	19	#include <linux/gpio.h>
	20	#include <linux/irq.h>
	21	#include <linux/delay.h>
	22	#include <linux/iio/iio.h>
	23	#include <linux/iio/sysfs.h>
	24	#include <linux/iio/trigger.h>
	25	#include <linux/iio/buffer.h>
	26	#include <asm/unaligned.h>
	27
	28	#include <linux/iio/common/st_sensors.h>
	29	#include "st_pressure.h"
	30
67dbf54a JA	31	#define ST_PRESS_LSB_PER_MBAR 4096UL
	32	#define ST_PRESS_KPASCAL_NANO_SCALE (100000000UL / \
	33	ST_PRESS_LSB_PER_MBAR)
1003eb67 JA	34	#define ST_PRESS_LSB_PER_CELSIUS 480UL
	35	#define ST_PRESS_CELSIUS_NANO_SCALE (1000000000UL / \
	36	ST_PRESS_LSB_PER_CELSIUS)
217494e5 DC	37	#define ST_PRESS_NUMBER_DATA_CHANNELS 1
217494e5 DC	38
217494e5 DC	39	/* FULLSCALE */
	40	#define ST_PRESS_FS_AVL_1260MB 1260
	41
93187840 DC	42	#define ST_PRESS_1_OUT_XL_ADDR 0x28
	43	#define ST_TEMP_1_OUT_L_ADDR 0x2b
	44
302fbd50 LJ	45	/* CUSTOM VALUES FOR LPS331AP SENSOR */
	46	#define ST_PRESS_LPS331AP_WAI_EXP 0xbb
	47	#define ST_PRESS_LPS331AP_ODR_ADDR 0x20
	48	#define ST_PRESS_LPS331AP_ODR_MASK 0x70
	49	#define ST_PRESS_LPS331AP_ODR_AVL_1HZ_VAL 0x01
	50	#define ST_PRESS_LPS331AP_ODR_AVL_7HZ_VAL 0x05
	51	#define ST_PRESS_LPS331AP_ODR_AVL_13HZ_VAL 0x06
	52	#define ST_PRESS_LPS331AP_ODR_AVL_25HZ_VAL 0x07
	53	#define ST_PRESS_LPS331AP_PW_ADDR 0x20
	54	#define ST_PRESS_LPS331AP_PW_MASK 0x80
	55	#define ST_PRESS_LPS331AP_FS_ADDR 0x23
	56	#define ST_PRESS_LPS331AP_FS_MASK 0x30
	57	#define ST_PRESS_LPS331AP_FS_AVL_1260_VAL 0x00
	58	#define ST_PRESS_LPS331AP_FS_AVL_1260_GAIN ST_PRESS_KPASCAL_NANO_SCALE
	59	#define ST_PRESS_LPS331AP_FS_AVL_TEMP_GAIN ST_PRESS_CELSIUS_NANO_SCALE
	60	#define ST_PRESS_LPS331AP_BDU_ADDR 0x20
	61	#define ST_PRESS_LPS331AP_BDU_MASK 0x04
	62	#define ST_PRESS_LPS331AP_DRDY_IRQ_ADDR 0x22
	63	#define ST_PRESS_LPS331AP_DRDY_IRQ_INT1_MASK 0x04
	64	#define ST_PRESS_LPS331AP_DRDY_IRQ_INT2_MASK 0x20
	65	#define ST_PRESS_LPS331AP_MULTIREAD_BIT true
	66	#define ST_PRESS_LPS331AP_TEMP_OFFSET 42500
217494e5	67
7885a8ce LJ	68	/* CUSTOM VALUES FOR LPS001WP SENSOR */
	69	#define ST_PRESS_LPS001WP_WAI_EXP 0xba
	70	#define ST_PRESS_LPS001WP_ODR_ADDR 0x20
	71	#define ST_PRESS_LPS001WP_ODR_MASK 0x30
	72	#define ST_PRESS_LPS001WP_ODR_AVL_1HZ_VAL 0x01
	73	#define ST_PRESS_LPS001WP_ODR_AVL_7HZ_VAL 0x02
	74	#define ST_PRESS_LPS001WP_ODR_AVL_13HZ_VAL 0x03
	75	#define ST_PRESS_LPS001WP_PW_ADDR 0x20
	76	#define ST_PRESS_LPS001WP_PW_MASK 0x40
	77	#define ST_PRESS_LPS001WP_BDU_ADDR 0x20
	78	#define ST_PRESS_LPS001WP_BDU_MASK 0x04
	79	#define ST_PRESS_LPS001WP_MULTIREAD_BIT true
	80	#define ST_PRESS_LPS001WP_OUT_L_ADDR 0x28
	81	#define ST_TEMP_LPS001WP_OUT_L_ADDR 0x2a
	82
93187840 DC	83	/* CUSTOM VALUES FOR LPS25H SENSOR */
	84	#define ST_PRESS_LPS25H_WAI_EXP 0xbd
	85	#define ST_PRESS_LPS25H_ODR_ADDR 0x20
	86	#define ST_PRESS_LPS25H_ODR_MASK 0x70
	87	#define ST_PRESS_LPS25H_ODR_AVL_1HZ_VAL 0x01
	88	#define ST_PRESS_LPS25H_ODR_AVL_7HZ_VAL 0x02
	89	#define ST_PRESS_LPS25H_ODR_AVL_13HZ_VAL 0x03
	90	#define ST_PRESS_LPS25H_ODR_AVL_25HZ_VAL 0x04
	91	#define ST_PRESS_LPS25H_PW_ADDR 0x20
	92	#define ST_PRESS_LPS25H_PW_MASK 0x80
	93	#define ST_PRESS_LPS25H_FS_ADDR 0x00
	94	#define ST_PRESS_LPS25H_FS_MASK 0x00
	95	#define ST_PRESS_LPS25H_FS_AVL_1260_VAL 0x00
	96	#define ST_PRESS_LPS25H_FS_AVL_1260_GAIN ST_PRESS_KPASCAL_NANO_SCALE
	97	#define ST_PRESS_LPS25H_FS_AVL_TEMP_GAIN ST_PRESS_CELSIUS_NANO_SCALE
	98	#define ST_PRESS_LPS25H_BDU_ADDR 0x20
	99	#define ST_PRESS_LPS25H_BDU_MASK 0x04
	100	#define ST_PRESS_LPS25H_DRDY_IRQ_ADDR 0x23
	101	#define ST_PRESS_LPS25H_DRDY_IRQ_INT1_MASK 0x01
	102	#define ST_PRESS_LPS25H_DRDY_IRQ_INT2_MASK 0x10
	103	#define ST_PRESS_LPS25H_MULTIREAD_BIT true
	104	#define ST_PRESS_LPS25H_TEMP_OFFSET 42500
	105	#define ST_PRESS_LPS25H_OUT_XL_ADDR 0x28
	106	#define ST_TEMP_LPS25H_OUT_L_ADDR 0x2b
	107
	108	static const struct iio_chan_spec st_press_1_channels[] = {
2f5effcb LJ	109	{
	110	.type = IIO_PRESSURE,
	111	.channel2 = IIO_NO_MOD,
93187840	112	.address = ST_PRESS_1_OUT_XL_ADDR,
2f5effcb LJ	113	.scan_index = ST_SENSORS_SCAN_X,
	114	.scan_type = {
	115	.sign = 'u',
	116	.realbits = 24,
	117	.storagebits = 24,
	118	.endianness = IIO_LE,
	119	},
	120	.info_mask_separate =
217494e5	121	BIT(IIO_CHAN_INFO_RAW) \| BIT(IIO_CHAN_INFO_SCALE),
2f5effcb LJ	122	.modified = 0,
	123	},
	124	{
	125	.type = IIO_TEMP,
	126	.channel2 = IIO_NO_MOD,
93187840	127	.address = ST_TEMP_1_OUT_L_ADDR,
2f5effcb LJ	128	.scan_index = -1,
	129	.scan_type = {
	130	.sign = 'u',
	131	.realbits = 16,
	132	.storagebits = 16,
	133	.endianness = IIO_LE,
	134	},
	135	.info_mask_separate =
	136	BIT(IIO_CHAN_INFO_RAW) \|
	137	BIT(IIO_CHAN_INFO_SCALE) \|
	138	BIT(IIO_CHAN_INFO_OFFSET),
	139	.modified = 0,
	140	},
217494e5 DC	141	IIO_CHAN_SOFT_TIMESTAMP(1)
	142	};
	143
7885a8ce LJ	144	static const struct iio_chan_spec st_press_lps001wp_channels[] = {
	145	{
	146	.type = IIO_PRESSURE,
	147	.channel2 = IIO_NO_MOD,
	148	.address = ST_PRESS_LPS001WP_OUT_L_ADDR,
	149	.scan_index = ST_SENSORS_SCAN_X,
	150	.scan_type = {
	151	.sign = 'u',
	152	.realbits = 16,
	153	.storagebits = 16,
	154	.endianness = IIO_LE,
	155	},
	156	.info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
	157	.modified = 0,
	158	},
	159	{
	160	.type = IIO_TEMP,
	161	.channel2 = IIO_NO_MOD,
	162	.address = ST_TEMP_LPS001WP_OUT_L_ADDR,
	163	.scan_index = -1,
	164	.scan_type = {
	165	.sign = 'u',
	166	.realbits = 16,
	167	.storagebits = 16,
	168	.endianness = IIO_LE,
	169	},
	170	.info_mask_separate =
	171	BIT(IIO_CHAN_INFO_RAW) \|
	172	BIT(IIO_CHAN_INFO_OFFSET),
	173	.modified = 0,
	174	},
	175	IIO_CHAN_SOFT_TIMESTAMP(1)
	176	};
	177
a7ee8839	178	static const struct st_sensor_settings st_press_sensors_settings[] = {
217494e5	179	{
302fbd50	180	.wai = ST_PRESS_LPS331AP_WAI_EXP,
217494e5 DC	181	.sensors_supported = {
	182	[0] = LPS331AP_PRESS_DEV_NAME,
	183	},
93187840 DC	184	.ch = (struct iio_chan_spec *)st_press_1_channels,
93187840 DC	185	.num_ch = ARRAY_SIZE(st_press_1_channels),
217494e5	186	.odr = {
302fbd50 LJ	187	.addr = ST_PRESS_LPS331AP_ODR_ADDR,
302fbd50 LJ	188	.mask = ST_PRESS_LPS331AP_ODR_MASK,
217494e5	189	.odr_avl = {
302fbd50 LJ	190	{ 1, ST_PRESS_LPS331AP_ODR_AVL_1HZ_VAL, },
	191	{ 7, ST_PRESS_LPS331AP_ODR_AVL_7HZ_VAL, },
	192	{ 13, ST_PRESS_LPS331AP_ODR_AVL_13HZ_VAL, },
	193	{ 25, ST_PRESS_LPS331AP_ODR_AVL_25HZ_VAL, },
217494e5 DC	194	},
	195	},
	196	.pw = {
302fbd50 LJ	197	.addr = ST_PRESS_LPS331AP_PW_ADDR,
302fbd50 LJ	198	.mask = ST_PRESS_LPS331AP_PW_MASK,
217494e5 DC	199	.value_on = ST_SENSORS_DEFAULT_POWER_ON_VALUE,
	200	.value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
	201	},
	202	.fs = {
302fbd50 LJ	203	.addr = ST_PRESS_LPS331AP_FS_ADDR,
302fbd50 LJ	204	.mask = ST_PRESS_LPS331AP_FS_MASK,
217494e5 DC	205	.fs_avl = {
	206	[0] = {
	207	.num = ST_PRESS_FS_AVL_1260MB,
302fbd50 LJ	208	.value = ST_PRESS_LPS331AP_FS_AVL_1260_VAL,
	209	.gain = ST_PRESS_LPS331AP_FS_AVL_1260_GAIN,
	210	.gain2 = ST_PRESS_LPS331AP_FS_AVL_TEMP_GAIN,
217494e5 DC	211	},
	212	},
	213	},
	214	.bdu = {
302fbd50 LJ	215	.addr = ST_PRESS_LPS331AP_BDU_ADDR,
302fbd50 LJ	216	.mask = ST_PRESS_LPS331AP_BDU_MASK,
217494e5 DC	217	},
217494e5 DC	218	.drdy_irq = {
302fbd50 LJ	219	.addr = ST_PRESS_LPS331AP_DRDY_IRQ_ADDR,
	220	.mask_int1 = ST_PRESS_LPS331AP_DRDY_IRQ_INT1_MASK,
	221	.mask_int2 = ST_PRESS_LPS331AP_DRDY_IRQ_INT2_MASK,
217494e5	222	},
302fbd50	223	.multi_read_bit = ST_PRESS_LPS331AP_MULTIREAD_BIT,
217494e5 DC	224	.bootime = 2,
217494e5 DC	225	},
7885a8ce LJ	226	{
	227	.wai = ST_PRESS_LPS001WP_WAI_EXP,
	228	.sensors_supported = {
	229	[0] = LPS001WP_PRESS_DEV_NAME,
	230	},
	231	.ch = (struct iio_chan_spec *)st_press_lps001wp_channels,
	232	.num_ch = ARRAY_SIZE(st_press_lps001wp_channels),
	233	.odr = {
	234	.addr = ST_PRESS_LPS001WP_ODR_ADDR,
	235	.mask = ST_PRESS_LPS001WP_ODR_MASK,
	236	.odr_avl = {
	237	{ 1, ST_PRESS_LPS001WP_ODR_AVL_1HZ_VAL, },
	238	{ 7, ST_PRESS_LPS001WP_ODR_AVL_7HZ_VAL, },
	239	{ 13, ST_PRESS_LPS001WP_ODR_AVL_13HZ_VAL, },
	240	},
	241	},
	242	.pw = {
	243	.addr = ST_PRESS_LPS001WP_PW_ADDR,
	244	.mask = ST_PRESS_LPS001WP_PW_MASK,
	245	.value_on = ST_SENSORS_DEFAULT_POWER_ON_VALUE,
	246	.value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
	247	},
	248	.fs = {
	249	.addr = 0,
	250	},
	251	.bdu = {
	252	.addr = ST_PRESS_LPS001WP_BDU_ADDR,
	253	.mask = ST_PRESS_LPS001WP_BDU_MASK,
	254	},
	255	.drdy_irq = {
	256	.addr = 0,
	257	},
	258	.multi_read_bit = ST_PRESS_LPS001WP_MULTIREAD_BIT,
	259	.bootime = 2,
	260	},
93187840 DC	261	{
	262	.wai = ST_PRESS_LPS25H_WAI_EXP,
	263	.sensors_supported = {
	264	[0] = LPS25H_PRESS_DEV_NAME,
	265	},
	266	.ch = (struct iio_chan_spec *)st_press_1_channels,
	267	.num_ch = ARRAY_SIZE(st_press_1_channels),
	268	.odr = {
	269	.addr = ST_PRESS_LPS25H_ODR_ADDR,
	270	.mask = ST_PRESS_LPS25H_ODR_MASK,
	271	.odr_avl = {
	272	{ 1, ST_PRESS_LPS25H_ODR_AVL_1HZ_VAL, },
	273	{ 7, ST_PRESS_LPS25H_ODR_AVL_7HZ_VAL, },
	274	{ 13, ST_PRESS_LPS25H_ODR_AVL_13HZ_VAL, },
	275	{ 25, ST_PRESS_LPS25H_ODR_AVL_25HZ_VAL, },
	276	},
	277	},
	278	.pw = {
	279	.addr = ST_PRESS_LPS25H_PW_ADDR,
	280	.mask = ST_PRESS_LPS25H_PW_MASK,
	281	.value_on = ST_SENSORS_DEFAULT_POWER_ON_VALUE,
	282	.value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
	283	},
	284	.fs = {
	285	.addr = ST_PRESS_LPS25H_FS_ADDR,
	286	.mask = ST_PRESS_LPS25H_FS_MASK,
	287	.fs_avl = {
	288	[0] = {
	289	.num = ST_PRESS_FS_AVL_1260MB,
	290	.value = ST_PRESS_LPS25H_FS_AVL_1260_VAL,
	291	.gain = ST_PRESS_LPS25H_FS_AVL_1260_GAIN,
	292	.gain2 = ST_PRESS_LPS25H_FS_AVL_TEMP_GAIN,
	293	},
	294	},
	295	},
	296	.bdu = {
	297	.addr = ST_PRESS_LPS25H_BDU_ADDR,
	298	.mask = ST_PRESS_LPS25H_BDU_MASK,
	299	},
	300	.drdy_irq = {
	301	.addr = ST_PRESS_LPS25H_DRDY_IRQ_ADDR,
	302	.mask_int1 = ST_PRESS_LPS25H_DRDY_IRQ_INT1_MASK,
	303	.mask_int2 = ST_PRESS_LPS25H_DRDY_IRQ_INT2_MASK,
	304	},
	305	.multi_read_bit = ST_PRESS_LPS25H_MULTIREAD_BIT,
	306	.bootime = 2,
	307	},
217494e5 DC	308	};
217494e5 DC	309
2d239c9e JC	310	static int st_press_write_raw(struct iio_dev *indio_dev,
	311	struct iio_chan_spec const *ch,
	312	int val,
	313	int val2,
	314	long mask)
	315	{
	316	int err;
	317
	318	switch (mask) {
	319	case IIO_CHAN_INFO_SAMP_FREQ:
	320	if (val2)
	321	return -EINVAL;
	322	mutex_lock(&indio_dev->mlock);
	323	err = st_sensors_set_odr(indio_dev, val);
	324	mutex_unlock(&indio_dev->mlock);
	325	return err;
	326	default:
	327	return -EINVAL;
	328	}
	329	}
	330
217494e5 DC	331	static int st_press_read_raw(struct iio_dev *indio_dev,
	332	struct iio_chan_spec const ch, int val,
	333	int *val2, long mask)
	334	{
	335	int err;
	336	struct st_sensor_data *pdata = iio_priv(indio_dev);
	337
	338	switch (mask) {
	339	case IIO_CHAN_INFO_RAW:
	340	err = st_sensors_read_info_raw(indio_dev, ch, val);
	341	if (err < 0)
	342	goto read_error;
	343
	344	return IIO_VAL_INT;
	345	case IIO_CHAN_INFO_SCALE:
	346	*val = 0;
	347
	348	switch (ch->type) {
	349	case IIO_PRESSURE:
	350	*val2 = pdata->current_fullscale->gain;
	351	break;
	352	case IIO_TEMP:
	353	*val2 = pdata->current_fullscale->gain2;
	354	break;
	355	default:
	356	err = -EINVAL;
	357	goto read_error;
	358	}
	359
	360	return IIO_VAL_INT_PLUS_NANO;
	361	case IIO_CHAN_INFO_OFFSET:
	362	switch (ch->type) {
	363	case IIO_TEMP:
	364	*val = 425;
	365	*val2 = 10;
	366	break;
	367	default:
	368	err = -EINVAL;
	369	goto read_error;
	370	}
	371
	372	return IIO_VAL_FRACTIONAL;
2d239c9e JC	373	case IIO_CHAN_INFO_SAMP_FREQ:
	374	*val = pdata->odr;
	375	return IIO_VAL_INT;
217494e5 DC	376	default:
	377	return -EINVAL;
	378	}
	379
	380	read_error:
	381	return err;
	382	}
	383
217494e5 DC	384	static ST_SENSORS_DEV_ATTR_SAMP_FREQ_AVAIL();
	385
	386	static struct attribute *st_press_attributes[] = {
	387	&iio_dev_attr_sampling_frequency_available.dev_attr.attr,
217494e5 DC	388	NULL,
	389	};
	390
	391	static const struct attribute_group st_press_attribute_group = {
	392	.attrs = st_press_attributes,
	393	};
	394
	395	static const struct iio_info press_info = {
	396	.driver_module = THIS_MODULE,
	397	.attrs = &st_press_attribute_group,
	398	.read_raw = &st_press_read_raw,
2d239c9e	399	.write_raw = &st_press_write_raw,
217494e5 DC	400	};
	401
	402	#ifdef CONFIG_IIO_TRIGGER
	403	static const struct iio_trigger_ops st_press_trigger_ops = {
	404	.owner = THIS_MODULE,
	405	.set_trigger_state = ST_PRESS_TRIGGER_SET_STATE,
	406	};
	407	#define ST_PRESS_TRIGGER_OPS (&st_press_trigger_ops)
	408	#else
	409	#define ST_PRESS_TRIGGER_OPS NULL
	410	#endif
	411
23cde4d6 DC	412	int st_press_common_probe(struct iio_dev *indio_dev,
23cde4d6 DC	413	struct st_sensors_platform_data *plat_data)
217494e5	414	{
217494e5	415	struct st_sensor_data *pdata = iio_priv(indio_dev);
a6cc5b25 LJ	416	int irq = pdata->get_irq_data_ready(indio_dev);
a6cc5b25 LJ	417	int err;
217494e5 DC	418
	419	indio_dev->modes = INDIO_DIRECT_MODE;
	420	indio_dev->info = &press_info;
	421
ea7e586b	422	st_sensors_power_enable(indio_dev);
77448761	423
217494e5	424	err = st_sensors_check_device_support(indio_dev,
a7ee8839 DC	425	ARRAY_SIZE(st_press_sensors_settings),
a7ee8839 DC	426	st_press_sensors_settings);
217494e5	427	if (err < 0)
a6cc5b25	428	return err;
217494e5 DC	429
217494e5 DC	430	pdata->num_data_channels = ST_PRESS_NUMBER_DATA_CHANNELS;
a7ee8839 DC	431	pdata->multiread_bit = pdata->sensor_settings->multi_read_bit;
	432	indio_dev->channels = pdata->sensor_settings->ch;
	433	indio_dev->num_channels = pdata->sensor_settings->num_ch;
217494e5	434
a7ee8839	435	if (pdata->sensor_settings->fs.addr != 0)
362f2f86	436	pdata->current_fullscale = (struct st_sensor_fullscale_avl *)
a7ee8839	437	&pdata->sensor_settings->fs.fs_avl[0];
362f2f86	438
a7ee8839	439	pdata->odr = pdata->sensor_settings->odr.odr_avl[0].hz;
217494e5	440
38d1c6a9	441	/* Some devices don't support a data ready pin. */
a7ee8839	442	if (!plat_data && pdata->sensor_settings->drdy_irq.addr)
23cde4d6 DC	443	plat_data =
	444	(struct st_sensors_platform_data *)&default_press_pdata;
	445
	446	err = st_sensors_init_sensor(indio_dev, plat_data);
217494e5	447	if (err < 0)
a6cc5b25	448	return err;
217494e5	449
7a137c9c DC	450	err = st_press_allocate_ring(indio_dev);
	451	if (err < 0)
	452	return err;
217494e5	453
7a137c9c	454	if (irq > 0) {
217494e5	455	err = st_sensors_allocate_trigger(indio_dev,
a6cc5b25	456	ST_PRESS_TRIGGER_OPS);
217494e5 DC	457	if (err < 0)
	458	goto st_press_probe_trigger_error;
	459	}
	460
	461	err = iio_device_register(indio_dev);
	462	if (err)
	463	goto st_press_device_register_error;
	464
4f544ced LW	465	dev_info(&indio_dev->dev, "registered pressure sensor %s\n",
	466	indio_dev->name);
	467
217494e5 DC	468	return err;
	469
	470	st_press_device_register_error:
a6cc5b25	471	if (irq > 0)
217494e5 DC	472	st_sensors_deallocate_trigger(indio_dev);
217494e5 DC	473	st_press_probe_trigger_error:
7a137c9c	474	st_press_deallocate_ring(indio_dev);
a6cc5b25	475
217494e5 DC	476	return err;
	477	}
	478	EXPORT_SYMBOL(st_press_common_probe);
	479
	480	void st_press_common_remove(struct iio_dev *indio_dev)
	481	{
	482	struct st_sensor_data *pdata = iio_priv(indio_dev);
	483
ea7e586b	484	st_sensors_power_disable(indio_dev);
77448761	485
217494e5	486	iio_device_unregister(indio_dev);
7a137c9c	487	if (pdata->get_irq_data_ready(indio_dev) > 0)
217494e5	488	st_sensors_deallocate_trigger(indio_dev);
7a137c9c DC	489
7a137c9c DC	490	st_press_deallocate_ring(indio_dev);
217494e5 DC	491	}
	492	EXPORT_SYMBOL(st_press_common_remove);
	493
	494	MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>");
	495	MODULE_DESCRIPTION("STMicroelectronics pressures driver");
	496	MODULE_LICENSE("GPL v2");