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gfiber / kernel / bruno / 85290a163b0661c2d7576c18ee49b32bf10ec32f / . / drivers / iio / magnetometer / st_magn_core.c
blob: b27f0146647bb14996dda61d0a11bd31fc2de6cc [file] [log] [blame]
/*
* STMicroelectronics magnetometers 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/buffer.h>
#include <linux/iio/common/st_sensors.h>
#include "st_magn.h"
#define ST_MAGN_NUMBER_DATA_CHANNELS 3
/* DEFAULT VALUE FOR SENSORS */
#define ST_MAGN_DEFAULT_OUT_X_H_ADDR 0X03
#define ST_MAGN_DEFAULT_OUT_Y_H_ADDR 0X07
#define ST_MAGN_DEFAULT_OUT_Z_H_ADDR 0X05
/* FULLSCALE */
#define ST_MAGN_FS_AVL_1300MG 1300
#define ST_MAGN_FS_AVL_1900MG 1900
#define ST_MAGN_FS_AVL_2500MG 2500
#define ST_MAGN_FS_AVL_4000MG 4000
#define ST_MAGN_FS_AVL_4700MG 4700
#define ST_MAGN_FS_AVL_5600MG 5600
#define ST_MAGN_FS_AVL_8000MG 8000
#define ST_MAGN_FS_AVL_8100MG 8100
#define ST_MAGN_FS_AVL_12000MG 12000
#define ST_MAGN_FS_AVL_15000MG 15000
#define ST_MAGN_FS_AVL_16000MG 16000
/* CUSTOM VALUES FOR SENSOR 0 */
#define ST_MAGN_0_ODR_ADDR 0x00
#define ST_MAGN_0_ODR_MASK 0x1c
#define ST_MAGN_0_ODR_AVL_1HZ_VAL 0x00
#define ST_MAGN_0_ODR_AVL_2HZ_VAL 0x01
#define ST_MAGN_0_ODR_AVL_3HZ_VAL 0x02
#define ST_MAGN_0_ODR_AVL_8HZ_VAL 0x03
#define ST_MAGN_0_ODR_AVL_15HZ_VAL 0x04
#define ST_MAGN_0_ODR_AVL_30HZ_VAL 0x05
#define ST_MAGN_0_ODR_AVL_75HZ_VAL 0x06
#define ST_MAGN_0_ODR_AVL_220HZ_VAL 0x07
#define ST_MAGN_0_PW_ADDR 0x02
#define ST_MAGN_0_PW_MASK 0x03
#define ST_MAGN_0_PW_ON 0x00
#define ST_MAGN_0_PW_OFF 0x03
#define ST_MAGN_0_FS_ADDR 0x01
#define ST_MAGN_0_FS_MASK 0xe0
#define ST_MAGN_0_FS_AVL_1300_VAL 0x01
#define ST_MAGN_0_FS_AVL_1900_VAL 0x02
#define ST_MAGN_0_FS_AVL_2500_VAL 0x03
#define ST_MAGN_0_FS_AVL_4000_VAL 0x04
#define ST_MAGN_0_FS_AVL_4700_VAL 0x05
#define ST_MAGN_0_FS_AVL_5600_VAL 0x06
#define ST_MAGN_0_FS_AVL_8100_VAL 0x07
#define ST_MAGN_0_FS_AVL_1300_GAIN_XY 1100
#define ST_MAGN_0_FS_AVL_1900_GAIN_XY 855
#define ST_MAGN_0_FS_AVL_2500_GAIN_XY 670
#define ST_MAGN_0_FS_AVL_4000_GAIN_XY 450
#define ST_MAGN_0_FS_AVL_4700_GAIN_XY 400
#define ST_MAGN_0_FS_AVL_5600_GAIN_XY 330
#define ST_MAGN_0_FS_AVL_8100_GAIN_XY 230
#define ST_MAGN_0_FS_AVL_1300_GAIN_Z 980
#define ST_MAGN_0_FS_AVL_1900_GAIN_Z 760
#define ST_MAGN_0_FS_AVL_2500_GAIN_Z 600
#define ST_MAGN_0_FS_AVL_4000_GAIN_Z 400
#define ST_MAGN_0_FS_AVL_4700_GAIN_Z 355
#define ST_MAGN_0_FS_AVL_5600_GAIN_Z 295
#define ST_MAGN_0_FS_AVL_8100_GAIN_Z 205
#define ST_MAGN_0_MULTIREAD_BIT false
/* CUSTOM VALUES FOR SENSOR 1 */
#define ST_MAGN_1_WAI_EXP 0x3c
#define ST_MAGN_1_ODR_ADDR 0x00
#define ST_MAGN_1_ODR_MASK 0x1c
#define ST_MAGN_1_ODR_AVL_1HZ_VAL 0x00
#define ST_MAGN_1_ODR_AVL_2HZ_VAL 0x01
#define ST_MAGN_1_ODR_AVL_3HZ_VAL 0x02
#define ST_MAGN_1_ODR_AVL_8HZ_VAL 0x03
#define ST_MAGN_1_ODR_AVL_15HZ_VAL 0x04
#define ST_MAGN_1_ODR_AVL_30HZ_VAL 0x05
#define ST_MAGN_1_ODR_AVL_75HZ_VAL 0x06
#define ST_MAGN_1_ODR_AVL_220HZ_VAL 0x07
#define ST_MAGN_1_PW_ADDR 0x02
#define ST_MAGN_1_PW_MASK 0x03
#define ST_MAGN_1_PW_ON 0x00
#define ST_MAGN_1_PW_OFF 0x03
#define ST_MAGN_1_FS_ADDR 0x01
#define ST_MAGN_1_FS_MASK 0xe0
#define ST_MAGN_1_FS_AVL_1300_VAL 0x01
#define ST_MAGN_1_FS_AVL_1900_VAL 0x02
#define ST_MAGN_1_FS_AVL_2500_VAL 0x03
#define ST_MAGN_1_FS_AVL_4000_VAL 0x04
#define ST_MAGN_1_FS_AVL_4700_VAL 0x05
#define ST_MAGN_1_FS_AVL_5600_VAL 0x06
#define ST_MAGN_1_FS_AVL_8100_VAL 0x07
#define ST_MAGN_1_FS_AVL_1300_GAIN_XY 909
#define ST_MAGN_1_FS_AVL_1900_GAIN_XY 1169
#define ST_MAGN_1_FS_AVL_2500_GAIN_XY 1492
#define ST_MAGN_1_FS_AVL_4000_GAIN_XY 2222
#define ST_MAGN_1_FS_AVL_4700_GAIN_XY 2500
#define ST_MAGN_1_FS_AVL_5600_GAIN_XY 3030
#define ST_MAGN_1_FS_AVL_8100_GAIN_XY 4347
#define ST_MAGN_1_FS_AVL_1300_GAIN_Z 1020
#define ST_MAGN_1_FS_AVL_1900_GAIN_Z 1315
#define ST_MAGN_1_FS_AVL_2500_GAIN_Z 1666
#define ST_MAGN_1_FS_AVL_4000_GAIN_Z 2500
#define ST_MAGN_1_FS_AVL_4700_GAIN_Z 2816
#define ST_MAGN_1_FS_AVL_5600_GAIN_Z 3389
#define ST_MAGN_1_FS_AVL_8100_GAIN_Z 4878
#define ST_MAGN_1_MULTIREAD_BIT false
/* CUSTOM VALUES FOR SENSOR 2 */
#define ST_MAGN_2_WAI_EXP 0x3d
#define ST_MAGN_2_ODR_ADDR 0x20
#define ST_MAGN_2_ODR_MASK 0x1c
#define ST_MAGN_2_ODR_AVL_1HZ_VAL 0x00
#define ST_MAGN_2_ODR_AVL_2HZ_VAL 0x01
#define ST_MAGN_2_ODR_AVL_3HZ_VAL 0x02
#define ST_MAGN_2_ODR_AVL_5HZ_VAL 0x03
#define ST_MAGN_2_ODR_AVL_10HZ_VAL 0x04
#define ST_MAGN_2_ODR_AVL_20HZ_VAL 0x05
#define ST_MAGN_2_ODR_AVL_40HZ_VAL 0x06
#define ST_MAGN_2_ODR_AVL_80HZ_VAL 0x07
#define ST_MAGN_2_PW_ADDR 0x22
#define ST_MAGN_2_PW_MASK 0x03
#define ST_MAGN_2_PW_ON 0x00
#define ST_MAGN_2_PW_OFF 0x03
#define ST_MAGN_2_FS_ADDR 0x21
#define ST_MAGN_2_FS_MASK 0x60
#define ST_MAGN_2_FS_AVL_4000_VAL 0x00
#define ST_MAGN_2_FS_AVL_8000_VAL 0x01
#define ST_MAGN_2_FS_AVL_12000_VAL 0x02
#define ST_MAGN_2_FS_AVL_16000_VAL 0x03
#define ST_MAGN_2_FS_AVL_4000_GAIN 146
#define ST_MAGN_2_FS_AVL_8000_GAIN 292
#define ST_MAGN_2_FS_AVL_12000_GAIN 438
#define ST_MAGN_2_FS_AVL_16000_GAIN 584
#define ST_MAGN_2_MULTIREAD_BIT false
#define ST_MAGN_2_OUT_X_L_ADDR 0x28
#define ST_MAGN_2_OUT_Y_L_ADDR 0x2a
#define ST_MAGN_2_OUT_Z_L_ADDR 0x2c
/* CUSTOM VALUES FOR SENSOR 3 */
#define ST_MAGN_3_WAI_ADDR 0x4f
#define ST_MAGN_3_WAI_EXP 0x40
#define ST_MAGN_3_ODR_ADDR 0x60
#define ST_MAGN_3_ODR_MASK 0x0c
#define ST_MAGN_3_ODR_AVL_10HZ_VAL 0x00
#define ST_MAGN_3_ODR_AVL_20HZ_VAL 0x01
#define ST_MAGN_3_ODR_AVL_50HZ_VAL 0x02
#define ST_MAGN_3_ODR_AVL_100HZ_VAL 0x03
#define ST_MAGN_3_PW_ADDR 0x60
#define ST_MAGN_3_PW_MASK 0x03
#define ST_MAGN_3_PW_ON 0x00
#define ST_MAGN_3_PW_OFF 0x03
#define ST_MAGN_3_BDU_ADDR 0x62
#define ST_MAGN_3_BDU_MASK 0x10
#define ST_MAGN_3_DRDY_IRQ_ADDR 0x62
#define ST_MAGN_3_DRDY_INT_MASK 0x01
#define ST_MAGN_3_FS_AVL_15000_GAIN 1500
#define ST_MAGN_3_MULTIREAD_BIT false
#define ST_MAGN_3_OUT_X_L_ADDR 0x68
#define ST_MAGN_3_OUT_Y_L_ADDR 0x6a
#define ST_MAGN_3_OUT_Z_L_ADDR 0x6c
static const struct iio_chan_spec st_magn_16bit_channels[] = {
ST_SENSORS_LSM_CHANNELS(IIO_MAGN,
BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
ST_SENSORS_SCAN_X, 1, IIO_MOD_X, 's', IIO_BE, 16, 16,
ST_MAGN_DEFAULT_OUT_X_H_ADDR),
ST_SENSORS_LSM_CHANNELS(IIO_MAGN,
BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
ST_SENSORS_SCAN_Y, 1, IIO_MOD_Y, 's', IIO_BE, 16, 16,
ST_MAGN_DEFAULT_OUT_Y_H_ADDR),
ST_SENSORS_LSM_CHANNELS(IIO_MAGN,
BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
ST_SENSORS_SCAN_Z, 1, IIO_MOD_Z, 's', IIO_BE, 16, 16,
ST_MAGN_DEFAULT_OUT_Z_H_ADDR),
IIO_CHAN_SOFT_TIMESTAMP(3)
};
static const struct iio_chan_spec st_magn_2_16bit_channels[] = {
ST_SENSORS_LSM_CHANNELS(IIO_MAGN,
BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
ST_SENSORS_SCAN_X, 1, IIO_MOD_X, 's', IIO_LE, 16, 16,
ST_MAGN_2_OUT_X_L_ADDR),
ST_SENSORS_LSM_CHANNELS(IIO_MAGN,
BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
ST_SENSORS_SCAN_Y, 1, IIO_MOD_Y, 's', IIO_LE, 16, 16,
ST_MAGN_2_OUT_Y_L_ADDR),
ST_SENSORS_LSM_CHANNELS(IIO_MAGN,
BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
ST_SENSORS_SCAN_Z, 1, IIO_MOD_Z, 's', IIO_LE, 16, 16,
ST_MAGN_2_OUT_Z_L_ADDR),
IIO_CHAN_SOFT_TIMESTAMP(3)
};
static const struct iio_chan_spec st_magn_3_16bit_channels[] = {
ST_SENSORS_LSM_CHANNELS(IIO_MAGN,
BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
ST_SENSORS_SCAN_X, 1, IIO_MOD_X, 's', IIO_LE, 16, 16,
ST_MAGN_3_OUT_X_L_ADDR),
ST_SENSORS_LSM_CHANNELS(IIO_MAGN,
BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
ST_SENSORS_SCAN_Y, 1, IIO_MOD_Y, 's', IIO_LE, 16, 16,
ST_MAGN_3_OUT_Y_L_ADDR),
ST_SENSORS_LSM_CHANNELS(IIO_MAGN,
BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
ST_SENSORS_SCAN_Z, 1, IIO_MOD_Z, 's', IIO_LE, 16, 16,
ST_MAGN_3_OUT_Z_L_ADDR),
IIO_CHAN_SOFT_TIMESTAMP(3)
};
static const struct st_sensor_settings st_magn_sensors_settings[] = {
{
.wai = 0, /* This sensor has no valid WhoAmI report 0 */
.wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
.sensors_supported = {
[0] = LSM303DLH_MAGN_DEV_NAME,
},
.ch = (struct iio_chan_spec *)st_magn_16bit_channels,
.odr = {
.addr = ST_MAGN_0_ODR_ADDR,
.mask = ST_MAGN_0_ODR_MASK,
.odr_avl = {
{ 1, ST_MAGN_0_ODR_AVL_1HZ_VAL, },
{ 2, ST_MAGN_0_ODR_AVL_2HZ_VAL, },
{ 3, ST_MAGN_0_ODR_AVL_3HZ_VAL, },
{ 8, ST_MAGN_0_ODR_AVL_8HZ_VAL, },
{ 15, ST_MAGN_0_ODR_AVL_15HZ_VAL, },
{ 30, ST_MAGN_0_ODR_AVL_30HZ_VAL, },
{ 75, ST_MAGN_0_ODR_AVL_75HZ_VAL, },
},
},
.pw = {
.addr = ST_MAGN_0_PW_ADDR,
.mask = ST_MAGN_0_PW_MASK,
.value_on = ST_MAGN_0_PW_ON,
.value_off = ST_MAGN_0_PW_OFF,
},
.fs = {
.addr = ST_MAGN_0_FS_ADDR,
.mask = ST_MAGN_0_FS_MASK,
.fs_avl = {
[0] = {
.num = ST_MAGN_FS_AVL_1300MG,
.value = ST_MAGN_0_FS_AVL_1300_VAL,
.gain = ST_MAGN_0_FS_AVL_1300_GAIN_XY,
.gain2 = ST_MAGN_0_FS_AVL_1300_GAIN_Z,
},
[1] = {
.num = ST_MAGN_FS_AVL_1900MG,
.value = ST_MAGN_0_FS_AVL_1900_VAL,
.gain = ST_MAGN_0_FS_AVL_1900_GAIN_XY,
.gain2 = ST_MAGN_0_FS_AVL_1900_GAIN_Z,
},
[2] = {
.num = ST_MAGN_FS_AVL_2500MG,
.value = ST_MAGN_0_FS_AVL_2500_VAL,
.gain = ST_MAGN_0_FS_AVL_2500_GAIN_XY,
.gain2 = ST_MAGN_0_FS_AVL_2500_GAIN_Z,
},
[3] = {
.num = ST_MAGN_FS_AVL_4000MG,
.value = ST_MAGN_0_FS_AVL_4000_VAL,
.gain = ST_MAGN_0_FS_AVL_4000_GAIN_XY,
.gain2 = ST_MAGN_0_FS_AVL_4000_GAIN_Z,
},
[4] = {
.num = ST_MAGN_FS_AVL_4700MG,
.value = ST_MAGN_0_FS_AVL_4700_VAL,
.gain = ST_MAGN_0_FS_AVL_4700_GAIN_XY,
.gain2 = ST_MAGN_0_FS_AVL_4700_GAIN_Z,
},
[5] = {
.num = ST_MAGN_FS_AVL_5600MG,
.value = ST_MAGN_0_FS_AVL_5600_VAL,
.gain = ST_MAGN_0_FS_AVL_5600_GAIN_XY,
.gain2 = ST_MAGN_0_FS_AVL_5600_GAIN_Z,
},
[6] = {
.num = ST_MAGN_FS_AVL_8100MG,
.value = ST_MAGN_0_FS_AVL_8100_VAL,
.gain = ST_MAGN_0_FS_AVL_8100_GAIN_XY,
.gain2 = ST_MAGN_0_FS_AVL_8100_GAIN_Z,
},
},
},
.multi_read_bit = ST_MAGN_0_MULTIREAD_BIT,
.bootime = 2,
},
{
.wai = ST_MAGN_1_WAI_EXP,
.wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
.sensors_supported = {
[0] = LSM303DLHC_MAGN_DEV_NAME,
[1] = LSM303DLM_MAGN_DEV_NAME,
},
.ch = (struct iio_chan_spec *)st_magn_16bit_channels,
.odr = {
.addr = ST_MAGN_1_ODR_ADDR,
.mask = ST_MAGN_1_ODR_MASK,
.odr_avl = {
{ 1, ST_MAGN_1_ODR_AVL_1HZ_VAL, },
{ 2, ST_MAGN_1_ODR_AVL_2HZ_VAL, },
{ 3, ST_MAGN_1_ODR_AVL_3HZ_VAL, },
{ 8, ST_MAGN_1_ODR_AVL_8HZ_VAL, },
{ 15, ST_MAGN_1_ODR_AVL_15HZ_VAL, },
{ 30, ST_MAGN_1_ODR_AVL_30HZ_VAL, },
{ 75, ST_MAGN_1_ODR_AVL_75HZ_VAL, },
{ 220, ST_MAGN_1_ODR_AVL_220HZ_VAL, },
},
},
.pw = {
.addr = ST_MAGN_1_PW_ADDR,
.mask = ST_MAGN_1_PW_MASK,
.value_on = ST_MAGN_1_PW_ON,
.value_off = ST_MAGN_1_PW_OFF,
},
.fs = {
.addr = ST_MAGN_1_FS_ADDR,
.mask = ST_MAGN_1_FS_MASK,
.fs_avl = {
[0] = {
.num = ST_MAGN_FS_AVL_1300MG,
.value = ST_MAGN_1_FS_AVL_1300_VAL,
.gain = ST_MAGN_1_FS_AVL_1300_GAIN_XY,
.gain2 = ST_MAGN_1_FS_AVL_1300_GAIN_Z,
},
[1] = {
.num = ST_MAGN_FS_AVL_1900MG,
.value = ST_MAGN_1_FS_AVL_1900_VAL,
.gain = ST_MAGN_1_FS_AVL_1900_GAIN_XY,
.gain2 = ST_MAGN_1_FS_AVL_1900_GAIN_Z,
},
[2] = {
.num = ST_MAGN_FS_AVL_2500MG,
.value = ST_MAGN_1_FS_AVL_2500_VAL,
.gain = ST_MAGN_1_FS_AVL_2500_GAIN_XY,
.gain2 = ST_MAGN_1_FS_AVL_2500_GAIN_Z,
},
[3] = {
.num = ST_MAGN_FS_AVL_4000MG,
.value = ST_MAGN_1_FS_AVL_4000_VAL,
.gain = ST_MAGN_1_FS_AVL_4000_GAIN_XY,
.gain2 = ST_MAGN_1_FS_AVL_4000_GAIN_Z,
},
[4] = {
.num = ST_MAGN_FS_AVL_4700MG,
.value = ST_MAGN_1_FS_AVL_4700_VAL,
.gain = ST_MAGN_1_FS_AVL_4700_GAIN_XY,
.gain2 = ST_MAGN_1_FS_AVL_4700_GAIN_Z,
},
[5] = {
.num = ST_MAGN_FS_AVL_5600MG,
.value = ST_MAGN_1_FS_AVL_5600_VAL,
.gain = ST_MAGN_1_FS_AVL_5600_GAIN_XY,
.gain2 = ST_MAGN_1_FS_AVL_5600_GAIN_Z,
},
[6] = {
.num = ST_MAGN_FS_AVL_8100MG,
.value = ST_MAGN_1_FS_AVL_8100_VAL,
.gain = ST_MAGN_1_FS_AVL_8100_GAIN_XY,
.gain2 = ST_MAGN_1_FS_AVL_8100_GAIN_Z,
},
},
},
.multi_read_bit = ST_MAGN_1_MULTIREAD_BIT,
.bootime = 2,
},
{
.wai = ST_MAGN_2_WAI_EXP,
.wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
.sensors_supported = {
[0] = LIS3MDL_MAGN_DEV_NAME,
},
.ch = (struct iio_chan_spec *)st_magn_2_16bit_channels,
.odr = {
.addr = ST_MAGN_2_ODR_ADDR,
.mask = ST_MAGN_2_ODR_MASK,
.odr_avl = {
{ 1, ST_MAGN_2_ODR_AVL_1HZ_VAL, },
{ 2, ST_MAGN_2_ODR_AVL_2HZ_VAL, },
{ 3, ST_MAGN_2_ODR_AVL_3HZ_VAL, },
{ 5, ST_MAGN_2_ODR_AVL_5HZ_VAL, },
{ 10, ST_MAGN_2_ODR_AVL_10HZ_VAL, },
{ 20, ST_MAGN_2_ODR_AVL_20HZ_VAL, },
{ 40, ST_MAGN_2_ODR_AVL_40HZ_VAL, },
{ 80, ST_MAGN_2_ODR_AVL_80HZ_VAL, },
},
},
.pw = {
.addr = ST_MAGN_2_PW_ADDR,
.mask = ST_MAGN_2_PW_MASK,
.value_on = ST_MAGN_2_PW_ON,
.value_off = ST_MAGN_2_PW_OFF,
},
.fs = {
.addr = ST_MAGN_2_FS_ADDR,
.mask = ST_MAGN_2_FS_MASK,
.fs_avl = {
[0] = {
.num = ST_MAGN_FS_AVL_4000MG,
.value = ST_MAGN_2_FS_AVL_4000_VAL,
.gain = ST_MAGN_2_FS_AVL_4000_GAIN,
},
[1] = {
.num = ST_MAGN_FS_AVL_8000MG,
.value = ST_MAGN_2_FS_AVL_8000_VAL,
.gain = ST_MAGN_2_FS_AVL_8000_GAIN,
},
[2] = {
.num = ST_MAGN_FS_AVL_12000MG,
.value = ST_MAGN_2_FS_AVL_12000_VAL,
.gain = ST_MAGN_2_FS_AVL_12000_GAIN,
},
[3] = {
.num = ST_MAGN_FS_AVL_16000MG,
.value = ST_MAGN_2_FS_AVL_16000_VAL,
.gain = ST_MAGN_2_FS_AVL_16000_GAIN,
},
},
},
.multi_read_bit = ST_MAGN_2_MULTIREAD_BIT,
.bootime = 2,
},
{
.wai = ST_MAGN_3_WAI_EXP,
.wai_addr = ST_MAGN_3_WAI_ADDR,
.sensors_supported = {
[0] = LSM303AGR_MAGN_DEV_NAME,
},
.ch = (struct iio_chan_spec *)st_magn_3_16bit_channels,
.odr = {
.addr = ST_MAGN_3_ODR_ADDR,
.mask = ST_MAGN_3_ODR_MASK,
.odr_avl = {
{ 10, ST_MAGN_3_ODR_AVL_10HZ_VAL, },
{ 20, ST_MAGN_3_ODR_AVL_20HZ_VAL, },
{ 50, ST_MAGN_3_ODR_AVL_50HZ_VAL, },
{ 100, ST_MAGN_3_ODR_AVL_100HZ_VAL, },
},
},
.pw = {
.addr = ST_MAGN_3_PW_ADDR,
.mask = ST_MAGN_3_PW_MASK,
.value_on = ST_MAGN_3_PW_ON,
.value_off = ST_MAGN_3_PW_OFF,
},
.fs = {
.fs_avl = {
[0] = {
.num = ST_MAGN_FS_AVL_15000MG,
.gain = ST_MAGN_3_FS_AVL_15000_GAIN,
},
},
},
.bdu = {
.addr = ST_MAGN_3_BDU_ADDR,
.mask = ST_MAGN_3_BDU_MASK,
},
.drdy_irq = {
.addr = ST_MAGN_3_DRDY_IRQ_ADDR,
.mask_int1 = ST_MAGN_3_DRDY_INT_MASK,
},
.multi_read_bit = ST_MAGN_3_MULTIREAD_BIT,
.bootime = 2,
},
};
static int st_magn_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 *mdata = 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;
if ((ch->scan_index == ST_SENSORS_SCAN_Z) &&
(mdata->current_fullscale->gain2 != 0))
*val2 = mdata->current_fullscale->gain2;
else
*val2 = mdata->current_fullscale->gain;
return IIO_VAL_INT_PLUS_MICRO;
case IIO_CHAN_INFO_SAMP_FREQ:
*val = mdata->odr;
return IIO_VAL_INT;
default:
return -EINVAL;
}
read_error:
return err;
}
static int st_magn_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;
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:
err = -EINVAL;
}
return err;
}
static ST_SENSORS_DEV_ATTR_SAMP_FREQ_AVAIL();
static ST_SENSORS_DEV_ATTR_SCALE_AVAIL(in_magn_scale_available);
static struct attribute *st_magn_attributes[] = {
&iio_dev_attr_sampling_frequency_available.dev_attr.attr,
&iio_dev_attr_in_magn_scale_available.dev_attr.attr,
NULL,
};
static const struct attribute_group st_magn_attribute_group = {
.attrs = st_magn_attributes,
};
static const struct iio_info magn_info = {
.driver_module = THIS_MODULE,
.attrs = &st_magn_attribute_group,
.read_raw = &st_magn_read_raw,
.write_raw = &st_magn_write_raw,
.debugfs_reg_access = &st_sensors_debugfs_reg_access,
};
#ifdef CONFIG_IIO_TRIGGER
static const struct iio_trigger_ops st_magn_trigger_ops = {
.owner = THIS_MODULE,
.set_trigger_state = ST_MAGN_TRIGGER_SET_STATE,
};
#define ST_MAGN_TRIGGER_OPS (&st_magn_trigger_ops)
#else
#define ST_MAGN_TRIGGER_OPS NULL
#endif
int st_magn_common_probe(struct iio_dev *indio_dev)
{
struct st_sensor_data *mdata = iio_priv(indio_dev);
int irq = mdata->get_irq_data_ready(indio_dev);
int err;
indio_dev->modes = INDIO_DIRECT_MODE;
indio_dev->info = &magn_info;
mutex_init(&mdata->tb.buf_lock);
st_sensors_power_enable(indio_dev);
err = st_sensors_check_device_support(indio_dev,
ARRAY_SIZE(st_magn_sensors_settings),
st_magn_sensors_settings);
if (err < 0)
return err;
mdata->num_data_channels = ST_MAGN_NUMBER_DATA_CHANNELS;
mdata->multiread_bit = mdata->sensor_settings->multi_read_bit;
indio_dev->channels = mdata->sensor_settings->ch;
indio_dev->num_channels = ST_SENSORS_NUMBER_ALL_CHANNELS;
mdata->current_fullscale = (struct st_sensor_fullscale_avl *)
&mdata->sensor_settings->fs.fs_avl[0];
mdata->odr = mdata->sensor_settings->odr.odr_avl[0].hz;
err = st_sensors_init_sensor(indio_dev, NULL);
if (err < 0)
return err;
err = st_magn_allocate_ring(indio_dev);
if (err < 0)
return err;
if (irq > 0) {
err = st_sensors_allocate_trigger(indio_dev,
ST_MAGN_TRIGGER_OPS);
if (err < 0)
goto st_magn_probe_trigger_error;
}
err = iio_device_register(indio_dev);
if (err)
goto st_magn_device_register_error;
dev_info(&indio_dev->dev, "registered magnetometer %s\n",
indio_dev->name);
return 0;
st_magn_device_register_error:
if (irq > 0)
st_sensors_deallocate_trigger(indio_dev);
st_magn_probe_trigger_error:
st_magn_deallocate_ring(indio_dev);
return err;
}
EXPORT_SYMBOL(st_magn_common_probe);
void st_magn_common_remove(struct iio_dev *indio_dev)
{
struct st_sensor_data *mdata = iio_priv(indio_dev);
st_sensors_power_disable(indio_dev);
iio_device_unregister(indio_dev);
if (mdata->get_irq_data_ready(indio_dev) > 0)
st_sensors_deallocate_trigger(indio_dev);
st_magn_deallocate_ring(indio_dev);
}
EXPORT_SYMBOL(st_magn_common_remove);
MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>");
MODULE_DESCRIPTION("STMicroelectronics magnetometers driver");
MODULE_LICENSE("GPL v2");