diff options
Diffstat (limited to 'drivers/iio/magnetometer/st_magn_core.c')
-rw-r--r-- | drivers/iio/magnetometer/st_magn_core.c | 656 |
1 files changed, 656 insertions, 0 deletions
diff --git a/drivers/iio/magnetometer/st_magn_core.c b/drivers/iio/magnetometer/st_magn_core.c new file mode 100644 index 0000000000..6cc0dfd318 --- /dev/null +++ b/drivers/iio/magnetometer/st_magn_core.c @@ -0,0 +1,656 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * STMicroelectronics magnetometers driver + * + * Copyright 2012-2013 STMicroelectronics Inc. + * + * Denis Ciocca <denis.ciocca@st.com> + */ + +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/mutex.h> +#include <linux/sysfs.h> +#include <linux/iio/iio.h> +#include <linux/iio/sysfs.h> +#include <linux/iio/trigger.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_2000MG 2000 +#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 + +/* Special L addresses for Sensor 2 */ +#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 + +/* Special L addresses for sensor 3 */ +#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 + +/* Special L addresses for sensor 4 */ +#define ST_MAGN_4_OUT_X_L_ADDR 0x08 +#define ST_MAGN_4_OUT_Y_L_ADDR 0x0a +#define ST_MAGN_4_OUT_Z_L_ADDR 0x0c + +static const struct iio_mount_matrix * +st_magn_get_mount_matrix(const struct iio_dev *indio_dev, + const struct iio_chan_spec *chan) +{ + struct st_sensor_data *mdata = iio_priv(indio_dev); + + return &mdata->mount_matrix; +} + +static const struct iio_chan_spec_ext_info st_magn_mount_matrix_ext_info[] = { + IIO_MOUNT_MATRIX(IIO_SHARED_BY_ALL, st_magn_get_mount_matrix), + { } +}; + +static const struct iio_chan_spec st_magn_16bit_channels[] = { + ST_SENSORS_LSM_CHANNELS_EXT(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_magn_mount_matrix_ext_info), + ST_SENSORS_LSM_CHANNELS_EXT(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_magn_mount_matrix_ext_info), + ST_SENSORS_LSM_CHANNELS_EXT(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, + st_magn_mount_matrix_ext_info), + IIO_CHAN_SOFT_TIMESTAMP(3) +}; + +static const struct iio_chan_spec st_magn_2_16bit_channels[] = { + ST_SENSORS_LSM_CHANNELS_EXT(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_magn_mount_matrix_ext_info), + ST_SENSORS_LSM_CHANNELS_EXT(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_magn_mount_matrix_ext_info), + ST_SENSORS_LSM_CHANNELS_EXT(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, + st_magn_mount_matrix_ext_info), + IIO_CHAN_SOFT_TIMESTAMP(3) +}; + +static const struct iio_chan_spec st_magn_3_16bit_channels[] = { + ST_SENSORS_LSM_CHANNELS_EXT(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_magn_mount_matrix_ext_info), + ST_SENSORS_LSM_CHANNELS_EXT(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_magn_mount_matrix_ext_info), + ST_SENSORS_LSM_CHANNELS_EXT(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, + st_magn_mount_matrix_ext_info), + IIO_CHAN_SOFT_TIMESTAMP(3) +}; + +static const struct iio_chan_spec st_magn_4_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_4_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_4_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_4_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 = 0x00, + .mask = 0x1c, + .odr_avl = { + { .hz = 1, .value = 0x00 }, + { .hz = 2, .value = 0x01 }, + { .hz = 3, .value = 0x02 }, + { .hz = 8, .value = 0x03 }, + { .hz = 15, .value = 0x04 }, + { .hz = 30, .value = 0x05 }, + { .hz = 75, .value = 0x06 }, + /* 220 Hz, 0x07 reportedly exist */ + }, + }, + .pw = { + .addr = 0x02, + .mask = 0x03, + .value_on = 0x00, + .value_off = 0x03, + }, + .fs = { + .addr = 0x01, + .mask = 0xe0, + .fs_avl = { + [0] = { + .num = ST_MAGN_FS_AVL_1300MG, + .value = 0x01, + .gain = 1100, + .gain2 = 980, + }, + [1] = { + .num = ST_MAGN_FS_AVL_1900MG, + .value = 0x02, + .gain = 855, + .gain2 = 760, + }, + [2] = { + .num = ST_MAGN_FS_AVL_2500MG, + .value = 0x03, + .gain = 670, + .gain2 = 600, + }, + [3] = { + .num = ST_MAGN_FS_AVL_4000MG, + .value = 0x04, + .gain = 450, + .gain2 = 400, + }, + [4] = { + .num = ST_MAGN_FS_AVL_4700MG, + .value = 0x05, + .gain = 400, + .gain2 = 355, + }, + [5] = { + .num = ST_MAGN_FS_AVL_5600MG, + .value = 0x06, + .gain = 330, + .gain2 = 295, + }, + [6] = { + .num = ST_MAGN_FS_AVL_8100MG, + .value = 0x07, + .gain = 230, + .gain2 = 205, + }, + }, + }, + .multi_read_bit = false, + .bootime = 2, + }, + { + .wai = 0x3c, + .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 = 0x00, + .mask = 0x1c, + .odr_avl = { + { .hz = 1, .value = 0x00 }, + { .hz = 2, .value = 0x01 }, + { .hz = 3, .value = 0x02 }, + { .hz = 8, .value = 0x03 }, + { .hz = 15, .value = 0x04 }, + { .hz = 30, .value = 0x05 }, + { .hz = 75, .value = 0x06 }, + { .hz = 220, .value = 0x07 }, + }, + }, + .pw = { + .addr = 0x02, + .mask = 0x03, + .value_on = 0x00, + .value_off = 0x03, + }, + .fs = { + .addr = 0x01, + .mask = 0xe0, + .fs_avl = { + [0] = { + .num = ST_MAGN_FS_AVL_1300MG, + .value = 0x01, + .gain = 909, + .gain2 = 1020, + }, + [1] = { + .num = ST_MAGN_FS_AVL_1900MG, + .value = 0x02, + .gain = 1169, + .gain2 = 1315, + }, + [2] = { + .num = ST_MAGN_FS_AVL_2500MG, + .value = 0x03, + .gain = 1492, + .gain2 = 1666, + }, + [3] = { + .num = ST_MAGN_FS_AVL_4000MG, + .value = 0x04, + .gain = 2222, + .gain2 = 2500, + }, + [4] = { + .num = ST_MAGN_FS_AVL_4700MG, + .value = 0x05, + .gain = 2500, + .gain2 = 2816, + }, + [5] = { + .num = ST_MAGN_FS_AVL_5600MG, + .value = 0x06, + .gain = 3030, + .gain2 = 3389, + }, + [6] = { + .num = ST_MAGN_FS_AVL_8100MG, + .value = 0x07, + .gain = 4347, + .gain2 = 4878, + }, + }, + }, + .multi_read_bit = false, + .bootime = 2, + }, + { + .wai = 0x3d, + .wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS, + .sensors_supported = { + [0] = LIS3MDL_MAGN_DEV_NAME, + [1] = LSM9DS1_MAGN_DEV_NAME, + [2] = LSM303C_MAGN_DEV_NAME, + }, + .ch = (struct iio_chan_spec *)st_magn_2_16bit_channels, + .odr = { + .addr = 0x20, + .mask = 0x1c, + .odr_avl = { + { .hz = 1, .value = 0x00 }, + { .hz = 2, .value = 0x01 }, + { .hz = 3, .value = 0x02 }, + { .hz = 5, .value = 0x03 }, + { .hz = 10, .value = 0x04 }, + { .hz = 20, .value = 0x05 }, + { .hz = 40, .value = 0x06 }, + { .hz = 80, .value = 0x07 }, + }, + }, + .pw = { + .addr = 0x22, + .mask = 0x03, + .value_on = 0x00, + .value_off = 0x03, + }, + .fs = { + .addr = 0x21, + .mask = 0x60, + .fs_avl = { + [0] = { + .num = ST_MAGN_FS_AVL_4000MG, + .value = 0x00, + .gain = 146, + }, + [1] = { + .num = ST_MAGN_FS_AVL_8000MG, + .value = 0x01, + .gain = 292, + }, + [2] = { + .num = ST_MAGN_FS_AVL_12000MG, + .value = 0x02, + .gain = 438, + }, + [3] = { + .num = ST_MAGN_FS_AVL_16000MG, + .value = 0x03, + .gain = 584, + }, + }, + }, + .bdu = { + .addr = 0x24, + .mask = 0x40, + }, + .drdy_irq = { + /* drdy line is routed drdy pin */ + .stat_drdy = { + .addr = ST_SENSORS_DEFAULT_STAT_ADDR, + .mask = 0x07, + }, + }, + .sim = { + .addr = 0x22, + .value = BIT(2), + }, + .multi_read_bit = true, + .bootime = 2, + }, + { + .wai = 0x40, + .wai_addr = 0x4f, + .sensors_supported = { + [0] = LSM303AGR_MAGN_DEV_NAME, + [1] = LIS2MDL_MAGN_DEV_NAME, + [2] = IIS2MDC_MAGN_DEV_NAME, + }, + .ch = (struct iio_chan_spec *)st_magn_3_16bit_channels, + .odr = { + .addr = 0x60, + .mask = 0x0c, + .odr_avl = { + { .hz = 10, .value = 0x00 }, + { .hz = 20, .value = 0x01 }, + { .hz = 50, .value = 0x02 }, + { .hz = 100, .value = 0x03 }, + }, + }, + .pw = { + .addr = 0x60, + .mask = 0x03, + .value_on = 0x00, + .value_off = 0x03, + }, + .fs = { + .fs_avl = { + [0] = { + .num = ST_MAGN_FS_AVL_15000MG, + .gain = 1500, + }, + }, + }, + .bdu = { + .addr = 0x62, + .mask = 0x10, + }, + .drdy_irq = { + .int1 = { + .addr = 0x62, + .mask = 0x01, + }, + .stat_drdy = { + .addr = 0x67, + .mask = 0x07, + }, + }, + .multi_read_bit = false, + .bootime = 2, + }, + { + .wai = 0x49, + .wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS, + .sensors_supported = { + [0] = LSM9DS0_IMU_DEV_NAME, + [1] = LSM303D_IMU_DEV_NAME, + }, + .ch = (struct iio_chan_spec *)st_magn_4_16bit_channels, + .odr = { + .addr = 0x24, + .mask = GENMASK(4, 2), + .odr_avl = { + { 3, 0x00, }, + { 6, 0x01, }, + { 12, 0x02, }, + { 25, 0x03, }, + { 50, 0x04, }, + { 100, 0x05, }, + }, + }, + .pw = { + .addr = 0x26, + .mask = GENMASK(1, 0), + .value_on = 0x00, + .value_off = 0x03, + }, + .fs = { + .addr = 0x25, + .mask = GENMASK(6, 5), + .fs_avl = { + [0] = { + .num = ST_MAGN_FS_AVL_2000MG, + .value = 0x00, + .gain = 73, + }, + [1] = { + .num = ST_MAGN_FS_AVL_4000MG, + .value = 0x01, + .gain = 146, + }, + [2] = { + .num = ST_MAGN_FS_AVL_8000MG, + .value = 0x02, + .gain = 292, + }, + [3] = { + .num = ST_MAGN_FS_AVL_12000MG, + .value = 0x03, + .gain = 438, + }, + }, + }, + .bdu = { + .addr = 0x20, + .mask = BIT(3), + }, + .drdy_irq = { + .int1 = { + .addr = 0x22, + .mask = BIT(1), + }, + .int2 = { + .addr = 0x23, + .mask = BIT(2), + }, + .stat_drdy = { + .addr = 0x07, + .mask = GENMASK(2, 0), + }, + }, + .sim = { + .addr = 0x21, + .value = BIT(0), + }, + .multi_read_bit = true, + .bootime = 2, + }, +}; + +/* Default magn DRDY is available on INT2 pin */ +static const struct st_sensors_platform_data default_magn_pdata = { + .drdy_int_pin = 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) +{ + switch (mask) { + case IIO_CHAN_INFO_SCALE: + return st_sensors_set_fullscale_by_gain(indio_dev, val2); + case IIO_CHAN_INFO_SAMP_FREQ: + if (val2) + return -EINVAL; + + return st_sensors_set_odr(indio_dev, val); + default: + return -EINVAL; + } +} + +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 = { + .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 = { + .set_trigger_state = ST_MAGN_TRIGGER_SET_STATE, + .validate_device = st_sensors_validate_device, +}; +#define ST_MAGN_TRIGGER_OPS (&st_magn_trigger_ops) +#else +#define ST_MAGN_TRIGGER_OPS NULL +#endif + +/* + * st_magn_get_settings() - get sensor settings from device name + * @name: device name buffer reference. + * + * Return: valid reference on success, NULL otherwise. + */ +const struct st_sensor_settings *st_magn_get_settings(const char *name) +{ + int index = st_sensors_get_settings_index(name, + st_magn_sensors_settings, + ARRAY_SIZE(st_magn_sensors_settings)); + if (index < 0) + return NULL; + + return &st_magn_sensors_settings[index]; +} +EXPORT_SYMBOL_NS(st_magn_get_settings, IIO_ST_SENSORS); + +int st_magn_common_probe(struct iio_dev *indio_dev) +{ + struct st_sensor_data *mdata = iio_priv(indio_dev); + struct device *parent = indio_dev->dev.parent; + struct st_sensors_platform_data *pdata = dev_get_platdata(parent); + int err; + + indio_dev->modes = INDIO_DIRECT_MODE; + indio_dev->info = &magn_info; + + err = st_sensors_verify_id(indio_dev); + if (err < 0) + return err; + + mdata->num_data_channels = ST_MAGN_NUMBER_DATA_CHANNELS; + indio_dev->channels = mdata->sensor_settings->ch; + indio_dev->num_channels = ST_SENSORS_NUMBER_ALL_CHANNELS; + + err = iio_read_mount_matrix(parent, &mdata->mount_matrix); + if (err) + return err; + + mdata->current_fullscale = &mdata->sensor_settings->fs.fs_avl[0]; + mdata->odr = mdata->sensor_settings->odr.odr_avl[0].hz; + + if (!pdata) + pdata = (struct st_sensors_platform_data *)&default_magn_pdata; + + err = st_sensors_init_sensor(indio_dev, pdata); + if (err < 0) + return err; + + err = st_magn_allocate_ring(indio_dev); + if (err < 0) + return err; + + if (mdata->irq > 0) { + err = st_sensors_allocate_trigger(indio_dev, + ST_MAGN_TRIGGER_OPS); + if (err < 0) + return err; + } + + return devm_iio_device_register(parent, indio_dev); +} +EXPORT_SYMBOL_NS(st_magn_common_probe, IIO_ST_SENSORS); + +MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>"); +MODULE_DESCRIPTION("STMicroelectronics magnetometers driver"); +MODULE_LICENSE("GPL v2"); +MODULE_IMPORT_NS(IIO_ST_SENSORS); |