This patch adds a generic magnetometer driver for STMicroelectronics magnetometers, currently it supports: LSM303DLHC, LSM303DLM, LIS3MDL. Signed-off-by: Denis Ciocca <denis.ciocca@xxxxxx> --- drivers/iio/magnetometer/Kconfig | 18 ++ drivers/iio/magnetometer/Makefile | 14 + drivers/iio/magnetometer/st_magn_buffer.c | 102 ++++++ drivers/iio/magnetometer/st_magn_core.c | 514 ++++++++++++++++++++++++++++++ drivers/iio/magnetometer/st_magn_i2c.c | 81 +++++ drivers/iio/magnetometer/st_magn_spi.c | 80 +++++ include/linux/iio/magnetometer/st_magn.h | 47 +++ 7 files changed, 856 insertions(+) create mode 100644 drivers/iio/magnetometer/st_magn_buffer.c create mode 100644 drivers/iio/magnetometer/st_magn_core.c create mode 100644 drivers/iio/magnetometer/st_magn_i2c.c create mode 100644 drivers/iio/magnetometer/st_magn_spi.c create mode 100644 include/linux/iio/magnetometer/st_magn.h diff --git a/drivers/iio/magnetometer/Kconfig b/drivers/iio/magnetometer/Kconfig index ff11d68..e170dd2 100644 --- a/drivers/iio/magnetometer/Kconfig +++ b/drivers/iio/magnetometer/Kconfig @@ -14,4 +14,22 @@ config HID_SENSOR_MAGNETOMETER_3D Say yes here to build support for the HID SENSOR Magnetometer 3D. +config IIO_ST_MAGN_3AXIS + tristate "STMicroelectronics magnetometers 3-Axis Driver" + depends on (I2C || SPI_MASTER) && SYSFS + select IIO_ST_SENSORS_CORE + select IIO_TRIGGERED_BUFFER if (IIO_BUFFER) + help + Say yes here to build support for STMicroelectronics magnetometers: + LSM303DLHC, LSM303DLM, LIS3MDL. + + This driver can also be built as a module. If so, will be created + these modules: + - st_magn_core (core functions for the driver [it is mandatory]); + - st_magn_i2c (necessary for the I2C devices [optional*]); + - st_magn_spi (necessary for the SPI devices [optional*]); + - st_magn_buffer (necessary for triggered buffer [optional]); + + (*) one of these is necessary to do something. + endmenu diff --git a/drivers/iio/magnetometer/Makefile b/drivers/iio/magnetometer/Makefile index 60dc4f2..62e1b15 100644 --- a/drivers/iio/magnetometer/Makefile +++ b/drivers/iio/magnetometer/Makefile @@ -3,3 +3,17 @@ # obj-$(CONFIG_HID_SENSOR_MAGNETOMETER_3D) += hid-sensor-magn-3d.o + +ifneq ($(CONFIG_IIO_BUFFER),) +obj-$(CONFIG_IIO_ST_MAGN_3AXIS) += st_magn_buffer.o +endif + +ifneq ($(CONFIG_I2C),) +obj-$(CONFIG_IIO_ST_MAGN_3AXIS) += st_magn_i2c.o +endif + +ifneq ($(CONFIG_SPI_MASTER),) +obj-$(CONFIG_IIO_ST_MAGN_3AXIS) += st_magn_spi.o +endif + +obj-$(CONFIG_IIO_ST_MAGN_3AXIS) += st_magn_core.o diff --git a/drivers/iio/magnetometer/st_magn_buffer.c b/drivers/iio/magnetometer/st_magn_buffer.c new file mode 100644 index 0000000..c396988 --- /dev/null +++ b/drivers/iio/magnetometer/st_magn_buffer.c @@ -0,0 +1,102 @@ +/* + * STMicroelectronics magnetometers driver + * + * Copyright 2012-2013 STMicroelectronics Inc. + * + * Denis Ciocca <denis.ciocca@xxxxxx> + * + * 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/byteorder/generic.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/magnetometer/st_magn.h> +#include <linux/iio/common/st_sensors.h> + + +static int st_magn_buffer_preenable(struct iio_dev *indio_dev) +{ + int err; + + err = st_magn_set_enable(indio_dev, true); + if (err < 0) + goto st_magn_set_enable_error; + + err = iio_sw_buffer_preenable(indio_dev); + +st_magn_set_enable_error: + return err; +} + +static int st_magn_buffer_postenable(struct iio_dev *indio_dev) +{ + int err; + struct st_sensor_data *mdata = iio_priv(indio_dev); + + mdata->buffer_data = kmalloc(indio_dev->scan_bytes, GFP_KERNEL); + if (mdata->buffer_data == NULL) { + err = -ENOMEM; + goto allocate_memory_error; + } + + err = iio_triggered_buffer_postenable(indio_dev); + if (err < 0) + goto st_magn_buffer_postenable_error; + + return err; + +st_magn_buffer_postenable_error: + kfree(mdata->buffer_data); +allocate_memory_error: + return err; +} + +static int st_magn_buffer_predisable(struct iio_dev *indio_dev) +{ + int err; + struct st_sensor_data *mdata = iio_priv(indio_dev); + + err = iio_triggered_buffer_predisable(indio_dev); + if (err < 0) + goto st_magn_buffer_predisable_error; + + err = st_magn_set_enable(indio_dev, false); + +st_magn_buffer_predisable_error: + kfree(mdata->buffer_data); + return err; +} + +static const struct iio_buffer_setup_ops st_magn_buffer_setup_ops = { + .preenable = &st_magn_buffer_preenable, + .postenable = &st_magn_buffer_postenable, + .predisable = &st_magn_buffer_predisable, +}; + +int st_magn_allocate_ring(struct iio_dev *indio_dev) +{ + return iio_triggered_buffer_setup(indio_dev, &iio_pollfunc_store_time, + &st_sensors_trigger_handler, &st_magn_buffer_setup_ops); +} +EXPORT_SYMBOL(st_magn_allocate_ring); + +void st_magn_deallocate_ring(struct iio_dev *indio_dev) +{ + iio_triggered_buffer_cleanup(indio_dev); +} +EXPORT_SYMBOL(st_magn_deallocate_ring); + +MODULE_AUTHOR("Denis Ciocca <denis.ciocca@xxxxxx>"); +MODULE_DESCRIPTION("STMicroelectronics magnetometers buffer"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/iio/magnetometer/st_magn_core.c b/drivers/iio/magnetometer/st_magn_core.c new file mode 100644 index 0000000..e8e9eb7 --- /dev/null +++ b/drivers/iio/magnetometer/st_magn_core.c @@ -0,0 +1,514 @@ +/* + * STMicroelectronics magnetometers driver + * + * Copyright 2012-2013 STMicroelectronics Inc. + * + * Denis Ciocca <denis.ciocca@xxxxxx> + * + * 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/magnetometer/st_magn.h> +#include <linux/iio/common/st_sensors.h> + + +/* DEFAULT VALUE FOR SENSORS */ +#define ST_MAGN_DEFAULT_OUT_X_L_ADDR 0X04 +#define ST_MAGN_DEFAULT_OUT_Y_L_ADDR 0X08 +#define ST_MAGN_DEFAULT_OUT_Z_L_ADDR 0X06 + +/* 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_10000MG 10000 + +/* 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 1100 +#define ST_MAGN_1_FS_AVL_1900_GAIN_XY 855 +#define ST_MAGN_1_FS_AVL_2500_GAIN_XY 670 +#define ST_MAGN_1_FS_AVL_4000_GAIN_XY 450 +#define ST_MAGN_1_FS_AVL_4700_GAIN_XY 400 +#define ST_MAGN_1_FS_AVL_5600_GAIN_XY 330 +#define ST_MAGN_1_FS_AVL_8100_GAIN_XY 230 +#define ST_MAGN_1_FS_AVL_1300_GAIN_Z 980 +#define ST_MAGN_1_FS_AVL_1900_GAIN_Z 760 +#define ST_MAGN_1_FS_AVL_2500_GAIN_Z 600 +#define ST_MAGN_1_FS_AVL_4000_GAIN_Z 400 +#define ST_MAGN_1_FS_AVL_4700_GAIN_Z 355 +#define ST_MAGN_1_FS_AVL_5600_GAIN_Z 295 +#define ST_MAGN_1_FS_AVL_8100_GAIN_Z 205 +#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_10000_VAL 0x02 +#define ST_MAGN_2_FS_AVL_4000_GAIN 430 +#define ST_MAGN_2_FS_AVL_8000_GAIN 230 +#define ST_MAGN_2_FS_AVL_10000_GAIN 230 +#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 + +static const struct iio_chan_spec st_magn_16bit_channels[] = { + ST_SENSORS_LSM_CHANNELS(IIO_MAGN, ST_SENSORS_SCAN_X, IIO_MOD_X, IIO_LE, + ST_SENSORS_DEFAULT_16_REALBITS, ST_MAGN_DEFAULT_OUT_X_L_ADDR), + ST_SENSORS_LSM_CHANNELS(IIO_MAGN, ST_SENSORS_SCAN_Y, IIO_MOD_Y, IIO_LE, + ST_SENSORS_DEFAULT_16_REALBITS, ST_MAGN_DEFAULT_OUT_Y_L_ADDR), + ST_SENSORS_LSM_CHANNELS(IIO_MAGN, ST_SENSORS_SCAN_Z, IIO_MOD_Z, IIO_LE, + ST_SENSORS_DEFAULT_16_REALBITS, ST_MAGN_DEFAULT_OUT_Z_L_ADDR), + IIO_CHAN_SOFT_TIMESTAMP(3) +}; + +static const struct iio_chan_spec st_magn_2_16bit_channels[] = { + ST_SENSORS_LSM_CHANNELS(IIO_MAGN, ST_SENSORS_SCAN_X, IIO_MOD_X, IIO_LE, + ST_SENSORS_DEFAULT_16_REALBITS, ST_MAGN_2_OUT_X_L_ADDR), + ST_SENSORS_LSM_CHANNELS(IIO_MAGN, ST_SENSORS_SCAN_Y, IIO_MOD_Y, IIO_LE, + ST_SENSORS_DEFAULT_16_REALBITS, ST_MAGN_2_OUT_Y_L_ADDR), + ST_SENSORS_LSM_CHANNELS(IIO_MAGN, ST_SENSORS_SCAN_Z, IIO_MOD_Z, IIO_LE, + ST_SENSORS_DEFAULT_16_REALBITS, ST_MAGN_2_OUT_Z_L_ADDR), + IIO_CHAN_SOFT_TIMESTAMP(3) +}; + +static const struct st_sensors st_magn_sensors[] = { + { + .wai = ST_MAGN_1_WAI_EXP, + .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, + .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_10000MG, + .value = ST_MAGN_2_FS_AVL_10000_VAL, + .gain = ST_MAGN_2_FS_AVL_10000_GAIN, + }, + }, + }, + .multi_read_bit = ST_MAGN_2_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: + mutex_lock(&indio_dev->mlock); + if (indio_dev->currentmode == INDIO_BUFFER_TRIGGERED) { + err = -EBUSY; + goto read_error; + } else { + err = st_sensors_set_enable(indio_dev, + &st_magn_sensors[mdata->index], true); + if (err < 0) + goto read_error; + + msleep((st_magn_sensors[mdata->index].bootime * 1000) + / mdata->odr); + err = st_sensors_read_axis_data(indio_dev, + ch->address, val); + if (err < 0) + goto read_error; + + *val = *val >> ch->scan_type.shift; + } + mutex_unlock(&indio_dev->mlock); + return IIO_VAL_INT; + case IIO_CHAN_INFO_SCALE: + *val = 0; + if (ch->scan_index != ST_SENSORS_SCAN_Z) + *val2 = mdata->current_fullscale->gain; + else + *val2 = mdata->current_fullscale->gain2; + return IIO_VAL_INT_PLUS_MICRO; + default: + return -EINVAL; + } + +read_error: + mutex_unlock(&indio_dev->mlock); + 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; + struct st_sensor_data *mdata = iio_priv(indio_dev); + + switch (mask) { + case IIO_CHAN_INFO_SCALE: + err = st_sensors_set_fullscale_by_gain(indio_dev, + &st_magn_sensors[mdata->index], val2); + break; + default: + err = -EINVAL; + } + + return err; +} + +int st_magn_set_axis_enable(struct iio_dev *indio_dev, u8 active_bit) +{ + return 0; +} +EXPORT_SYMBOL(st_magn_set_axis_enable); + +static int st_magn_check_device_support(struct iio_dev *indio_dev) +{ + int i, err; + u8 wai; + struct st_sensor_data *mdata = iio_priv(indio_dev); + + err = mdata->tf->read_byte(&mdata->tb, mdata->dev, + ST_SENSORS_DEFAULT_WAI_ADDRESS, &wai); + if (err < 0) { + dev_err(&indio_dev->dev, "failed to read Who-Am-I register.\n"); + goto read_wai_error; + } + + for (i = 0; i < ARRAY_SIZE(st_magn_sensors); i++) { + if (st_magn_sensors[i].wai == wai) + break; + } + if (i == ARRAY_SIZE(st_magn_sensors)) + goto check_device_error; + + mdata->index = i; + + return i; + +check_device_error: + dev_err(&indio_dev->dev, "device not supported -> wai (0x%x).\n", wai); + err = -ENODEV; +read_wai_error: + return err; +} + +int st_magn_set_enable(struct iio_dev *indio_dev, bool enable) +{ + struct st_sensor_data *mdata = iio_priv(indio_dev); + + return st_sensors_set_enable(indio_dev, + &st_magn_sensors[mdata->index], enable); +} +EXPORT_SYMBOL(st_magn_set_enable); + +static ssize_t st_magn_sysfs_set_sampling_frequency(struct device *dev, + struct device_attribute *attr, const char *buf, size_t size) +{ + int err; + unsigned int odr; + struct iio_dev *indio_dev = dev_get_drvdata(dev); + struct st_sensor_data *mdata = iio_priv(indio_dev); + + err = kstrtoint(buf, 10, &odr); + if (err < 0) + goto conversion_error; + + mutex_lock(&indio_dev->mlock); + err = st_sensors_set_odr(indio_dev, + &st_magn_sensors[mdata->index], odr); + mutex_unlock(&indio_dev->mlock); + +conversion_error: + return err < 0 ? err : size; +} + +static ssize_t st_magn_sysfs_get_sampling_frequency(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct iio_dev *indio_dev = dev_get_drvdata(dev); + struct st_sensor_data *mdata = iio_priv(indio_dev); + + return sprintf(buf, "%d\n", mdata->odr); +} + +static ssize_t st_magn_sysfs_scale_available(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct iio_dev *indio_dev = dev_get_drvdata(dev); + struct st_sensor_data *mdata = iio_priv(indio_dev); + + return st_sensors_get_scale_avl(indio_dev, + st_magn_sensors[mdata->index].fs.fs_avl, buf); +} + +static ssize_t st_magn_sysfs_sampling_frequency_available(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct iio_dev *indio_dev = dev_get_drvdata(dev); + struct st_sensor_data *mdata = iio_priv(indio_dev); + + return st_sensors_get_sampling_frequency_avl(indio_dev, + st_magn_sensors[mdata->index].odr.odr_avl, buf); +} + +static IIO_DEV_ATTR_SAMP_FREQ_AVAIL(st_magn_sysfs_sampling_frequency_available); + +static IIO_DEVICE_ATTR(in_magn_scale_available, S_IRUGO, + st_magn_sysfs_scale_available, NULL , 0); + +static IIO_DEV_ATTR_SAMP_FREQ(S_IWUSR | S_IRUGO, + st_magn_sysfs_get_sampling_frequency, + st_magn_sysfs_set_sampling_frequency); + +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, + &iio_dev_attr_sampling_frequency.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, +}; + +int st_magn_common_probe(struct iio_dev *indio_dev) +{ + int err; + struct st_sensor_data *mdata = iio_priv(indio_dev); + + indio_dev->modes = INDIO_DIRECT_MODE; + indio_dev->info = &magn_info; + + err = st_magn_check_device_support(indio_dev); + if (err < 0) + goto st_magn_common_probe_error; + + mdata->multiread_bit = st_magn_sensors[mdata->index].multi_read_bit; + indio_dev->channels = st_magn_sensors[mdata->index].ch; + indio_dev->num_channels = ST_SENSORS_NUMBER_ALL_CHANNELS; + + mdata->current_fullscale = (struct st_sensor_fullscale_avl *) + &st_magn_sensors[mdata->index].fs.fs_avl[0]; + mdata->odr = st_magn_sensors[mdata->index].odr.odr_avl[0].hz; + + err = st_sensors_init_sensor(indio_dev, + &st_magn_sensors[mdata->index]); + if (err < 0) + goto st_magn_common_probe_error; + + if (mdata->get_irq_data_ready(indio_dev) > 0) { + err = st_magn_allocate_ring(indio_dev); + if (err < 0) + goto st_magn_common_probe_error; + err = st_sensors_allocate_trigger(indio_dev, NULL); + if (err < 0) + goto st_magn_probe_trigger_error; + } + + err = iio_device_register(indio_dev); + if (err) + goto st_magn_device_register_error; + + return err; + +st_magn_device_register_error: + if (mdata->get_irq_data_ready(indio_dev) > 0) + st_sensors_deallocate_trigger(indio_dev); +st_magn_probe_trigger_error: + if (mdata->get_irq_data_ready(indio_dev) > 0) + st_magn_deallocate_ring(indio_dev); +st_magn_common_probe_error: + 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); + + 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); + } + iio_device_free(indio_dev); +} +EXPORT_SYMBOL(st_magn_common_remove); + +MODULE_AUTHOR("Denis Ciocca <denis.ciocca@xxxxxx>"); +MODULE_DESCRIPTION("STMicroelectronics magnetometers driver"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/iio/magnetometer/st_magn_i2c.c b/drivers/iio/magnetometer/st_magn_i2c.c new file mode 100644 index 0000000..01e33d7 --- /dev/null +++ b/drivers/iio/magnetometer/st_magn_i2c.c @@ -0,0 +1,81 @@ +/* + * STMicroelectronics magnetometers driver + * + * Copyright 2012-2013 STMicroelectronics Inc. + * + * Denis Ciocca <denis.ciocca@xxxxxx> + * + * Licensed under the GPL-2. + */ + +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/slab.h> +#include <linux/i2c.h> +#include <linux/iio/iio.h> +#include <linux/iio/trigger.h> + +#include <linux/iio/magnetometer/st_magn.h> +#include <linux/iio/common/st_sensors.h> + + +static int st_magn_i2c_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + struct iio_dev *indio_dev; + struct st_sensor_data *mdata; + int err; + + indio_dev = iio_device_alloc(sizeof(*mdata)); + if (indio_dev == NULL) { + err = -ENOMEM; + goto iio_device_alloc_error; + } + + mdata = iio_priv(indio_dev); + mdata->dev = &client->dev; + + st_sensors_i2c_configure(indio_dev, client, mdata); + + err = st_magn_common_probe(indio_dev); + if (err < 0) + goto st_magn_common_probe_error; + + return 0; + +st_magn_common_probe_error: + iio_device_free(indio_dev); +iio_device_alloc_error: + return err; +} + +static int st_magn_i2c_remove(struct i2c_client *client) +{ + struct iio_dev *indio_dev = i2c_get_clientdata(client); + st_magn_common_remove(indio_dev); + + return 0; +} + +static const struct i2c_device_id st_magn_id_table[] = { + { LSM303DLHC_MAGN_DEV_NAME }, + { LSM303DLM_MAGN_DEV_NAME }, + { LIS3MDL_MAGN_DEV_NAME }, + {}, +}; +MODULE_DEVICE_TABLE(i2c, st_magn_id_table); + +static struct i2c_driver st_magn_driver = { + .driver = { + .owner = THIS_MODULE, + .name = "st-magn-i2c", + }, + .probe = st_magn_i2c_probe, + .remove = st_magn_i2c_remove, + .id_table = st_magn_id_table, +}; +module_i2c_driver(st_magn_driver); + +MODULE_AUTHOR("Denis Ciocca <denis.ciocca@xxxxxx>"); +MODULE_DESCRIPTION("STMicroelectronics magnetometers i2c driver"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/iio/magnetometer/st_magn_spi.c b/drivers/iio/magnetometer/st_magn_spi.c new file mode 100644 index 0000000..e9c0601 --- /dev/null +++ b/drivers/iio/magnetometer/st_magn_spi.c @@ -0,0 +1,80 @@ +/* + * STMicroelectronics magnetometers driver + * + * Copyright 2012-2013 STMicroelectronics Inc. + * + * Denis Ciocca <denis.ciocca@xxxxxx> + * + * Licensed under the GPL-2. + */ + +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/slab.h> +#include <linux/spi/spi.h> +#include <linux/iio/iio.h> +#include <linux/iio/trigger.h> + +#include <linux/iio/magnetometer/st_magn.h> +#include <linux/iio/common/st_sensors.h> + + +static int st_magn_spi_probe(struct spi_device *spi) +{ + struct iio_dev *indio_dev; + struct st_sensor_data *mdata; + int err; + + indio_dev = iio_device_alloc(sizeof(*mdata)); + if (indio_dev == NULL) { + err = -ENOMEM; + goto iio_device_alloc_error; + } + + mdata = iio_priv(indio_dev); + mdata->dev = &spi->dev; + + st_sensors_spi_configure(indio_dev, spi, mdata); + + err = st_magn_common_probe(indio_dev); + if (err < 0) + goto st_magn_common_probe_error; + + return 0; + +st_magn_common_probe_error: + iio_device_free(indio_dev); +iio_device_alloc_error: + return err; +} + +static int st_magn_spi_remove(struct spi_device *spi) +{ + struct iio_dev *indio_dev = spi_get_drvdata(spi); + st_magn_common_remove(indio_dev); + + return 0; +} + +static const struct spi_device_id st_magn_id_table[] = { + { LSM303DLHC_MAGN_DEV_NAME }, + { LSM303DLM_MAGN_DEV_NAME }, + { LIS3MDL_MAGN_DEV_NAME }, + {}, +}; +MODULE_DEVICE_TABLE(spi, st_magn_id_table); + +static struct spi_driver st_magn_driver = { + .driver = { + .owner = THIS_MODULE, + .name = "st-magn-spi", + }, + .probe = st_magn_spi_probe, + .remove = st_magn_spi_remove, + .id_table = st_magn_id_table, +}; +module_spi_driver(st_magn_driver); + +MODULE_AUTHOR("Denis Ciocca <denis.ciocca@xxxxxx>"); +MODULE_DESCRIPTION("STMicroelectronics magnetometers spi driver"); +MODULE_LICENSE("GPL v2"); diff --git a/include/linux/iio/magnetometer/st_magn.h b/include/linux/iio/magnetometer/st_magn.h new file mode 100644 index 0000000..cde476e --- /dev/null +++ b/include/linux/iio/magnetometer/st_magn.h @@ -0,0 +1,47 @@ +/* + * STMicroelectronics magnetometers driver + * + * Copyright 2012-2013 STMicroelectronics Inc. + * + * Denis Ciocca <denis.ciocca@xxxxxx> + * v. 1.0.0 + * Licensed under the GPL-2. + */ + +#ifndef ST_MAGN_H +#define ST_MAGN_H + +#include <linux/types.h> +#include "../common/st_sensors.h" + +#define LSM303DLHC_MAGN_DEV_NAME "lsm303dlhc_magn" +#define LSM303DLM_MAGN_DEV_NAME "lsm303dlm_magn" +#define LIS3MDL_MAGN_DEV_NAME "lis3mdl" + +int st_magn_common_probe(struct iio_dev *indio_dev); +void st_magn_common_remove(struct iio_dev *indio_dev); +int st_magn_set_axis_enable(struct iio_dev *indio_dev, u8 active_bit); +int st_magn_set_enable(struct iio_dev *indio_dev, bool enable); + +#ifdef CONFIG_IIO_BUFFER +int st_magn_allocate_ring(struct iio_dev *indio_dev); +void st_magn_deallocate_ring(struct iio_dev *indio_dev); +#else /* CONFIG_IIO_BUFFER */ +static inline int st_magn_probe_trigger(struct iio_dev *indio_dev, int irq) +{ + return 0; +} +static inline void st_magn_remove_trigger(struct iio_dev *indio_dev, int irq) +{ + return; +} +static inline int st_magn_allocate_ring(struct iio_dev *indio_dev) +{ + return 0; +} +static inline void st_magn_deallocate_ring(struct iio_dev *indio_dev) +{ +} +#endif /* CONFIG_IIO_BUFFER */ + +#endif /* ST_MAGN_H */ -- 1.8.0.3 -- To unsubscribe from this list: send the line "unsubscribe linux-iio" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html