diff options
Diffstat (limited to 'include/linux/iio/common/st_sensors.h')
| -rw-r--r-- | include/linux/iio/common/st_sensors.h | 207 |
1 files changed, 131 insertions, 76 deletions
diff --git a/include/linux/iio/common/st_sensors.h b/include/linux/iio/common/st_sensors.h index 72b26940730d..f9ae5cdd884f 100644 --- a/include/linux/iio/common/st_sensors.h +++ b/include/linux/iio/common/st_sensors.h @@ -1,11 +1,10 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ /* * STMicroelectronics sensors library driver * * Copyright 2012-2013 STMicroelectronics Inc. * * Denis Ciocca <denis.ciocca@st.com> - * - * Licensed under the GPL-2. */ #ifndef ST_SENSORS_H @@ -14,11 +13,23 @@ #include <linux/i2c.h> #include <linux/spi/spi.h> #include <linux/irqreturn.h> +#include <linux/iio/iio.h> #include <linux/iio/trigger.h> #include <linux/bitops.h> +#include <linux/regulator/consumer.h> +#include <linux/regmap.h> + +#include <linux/platform_data/st_sensors_pdata.h> -#define ST_SENSORS_TX_MAX_LENGTH 2 -#define ST_SENSORS_RX_MAX_LENGTH 6 +#define LSM9DS0_IMU_DEV_NAME "lsm9ds0" +#define LSM303D_IMU_DEV_NAME "lsm303d" + +/* + * Buffer size max case: 2bytes per channel, 3 channels in total + + * 8bytes timestamp channel (s64) + */ +#define ST_SENSORS_MAX_BUFFER_SIZE (ALIGN(2 * 3, sizeof(s64)) + \ + sizeof(s64)) #define ST_SENSORS_ODR_LIST_MAX 10 #define ST_SENSORS_FULLSCALE_AVL_MAX 10 @@ -34,16 +45,18 @@ #define ST_SENSORS_DEFAULT_AXIS_ADDR 0x20 #define ST_SENSORS_DEFAULT_AXIS_MASK 0x07 #define ST_SENSORS_DEFAULT_AXIS_N_BIT 3 +#define ST_SENSORS_DEFAULT_STAT_ADDR 0x27 #define ST_SENSORS_MAX_NAME 17 -#define ST_SENSORS_MAX_4WAI 7 +#define ST_SENSORS_MAX_4WAI 8 -#define ST_SENSORS_LSM_CHANNELS(device_type, mask, index, mod, \ - ch2, s, endian, rbits, sbits, addr) \ +#define ST_SENSORS_LSM_CHANNELS_EXT(device_type, mask, index, mod, \ + ch2, s, endian, rbits, sbits, addr, ext) \ { \ .type = device_type, \ .modified = mod, \ .info_mask_separate = mask, \ + .info_mask_shared_by_all = BIT(IIO_CHAN_INFO_SAMP_FREQ), \ .scan_index = index, \ .channel2 = ch2, \ .address = addr, \ @@ -54,12 +67,13 @@ .storagebits = sbits, \ .endianness = endian, \ }, \ + .ext_info = ext, \ } -#define ST_SENSOR_DEV_ATTR_SAMP_FREQ() \ - IIO_DEV_ATTR_SAMP_FREQ(S_IWUSR | S_IRUGO, \ - st_sensors_sysfs_get_sampling_frequency, \ - st_sensors_sysfs_set_sampling_frequency) +#define ST_SENSORS_LSM_CHANNELS(device_type, mask, index, mod, \ + ch2, s, endian, rbits, sbits, addr) \ + ST_SENSORS_LSM_CHANNELS_EXT(device_type, mask, index, mod, \ + ch2, s, endian, rbits, sbits, addr, NULL) #define ST_SENSORS_DEV_ATTR_SAMP_FREQ_AVAIL() \ IIO_DEV_ATTR_SAMP_FREQ_AVAIL( \ @@ -105,6 +119,11 @@ struct st_sensor_fullscale { struct st_sensor_fullscale_avl fs_avl[ST_SENSORS_FULLSCALE_AVL_MAX]; }; +struct st_sensor_sim { + u8 addr; + u8 value; +}; + /** * struct st_sensor_bdu - ST sensor device block data update * @addr: address of the register. @@ -116,55 +135,59 @@ struct st_sensor_bdu { }; /** - * struct st_sensor_data_ready_irq - ST sensor device data-ready interrupt + * struct st_sensor_das - ST sensor device data alignment selection * @addr: address of the register. - * @mask: mask to write the on/off value. - * struct ig1 - represents the Interrupt Generator 1 of sensors. - * @en_addr: address of the enable ig1 register. - * @en_mask: mask to write the on/off value for enable. + * @mask: mask to write the das flag for left alignment. */ -struct st_sensor_data_ready_irq { +struct st_sensor_das { u8 addr; u8 mask; - struct { - u8 en_addr; - u8 en_mask; - } ig1; }; /** - * struct st_sensor_transfer_buffer - ST sensor device I/O buffer - * @buf_lock: Mutex to protect rx and tx buffers. - * @tx_buf: Buffer used by SPI transfer function to send data to the sensors. - * This buffer is used to avoid DMA not-aligned issue. - * @rx_buf: Buffer used by SPI transfer to receive data from sensors. - * This buffer is used to avoid DMA not-aligned issue. + * struct st_sensor_int_drdy - ST sensor device drdy line parameters + * @addr: address of INT drdy register. + * @mask: mask to enable drdy line. + * @addr_od: address to enable/disable Open Drain on the INT line. + * @mask_od: mask to enable/disable Open Drain on the INT line. */ -struct st_sensor_transfer_buffer { - struct mutex buf_lock; - u8 rx_buf[ST_SENSORS_RX_MAX_LENGTH]; - u8 tx_buf[ST_SENSORS_TX_MAX_LENGTH] ____cacheline_aligned; +struct st_sensor_int_drdy { + u8 addr; + u8 mask; + u8 addr_od; + u8 mask_od; }; /** - * struct st_sensor_transfer_function - ST sensor device I/O function - * @read_byte: Function used to read one byte. - * @write_byte: Function used to write one byte. - * @read_multiple_byte: Function used to read multiple byte. + * struct st_sensor_data_ready_irq - ST sensor device data-ready interrupt + * struct int1 - data-ready configuration register for INT1 pin. + * struct int2 - data-ready configuration register for INT2 pin. + * @addr_ihl: address to enable/disable active low on the INT lines. + * @mask_ihl: mask to enable/disable active low on the INT lines. + * struct stat_drdy - status register of DRDY (data ready) interrupt. + * struct ig1 - represents the Interrupt Generator 1 of sensors. + * @en_addr: address of the enable ig1 register. + * @en_mask: mask to write the on/off value for enable. */ -struct st_sensor_transfer_function { - int (*read_byte) (struct st_sensor_transfer_buffer *tb, - struct device *dev, u8 reg_addr, u8 *res_byte); - int (*write_byte) (struct st_sensor_transfer_buffer *tb, - struct device *dev, u8 reg_addr, u8 data); - int (*read_multiple_byte) (struct st_sensor_transfer_buffer *tb, - struct device *dev, u8 reg_addr, int len, u8 *data, - bool multiread_bit); +struct st_sensor_data_ready_irq { + struct st_sensor_int_drdy int1; + struct st_sensor_int_drdy int2; + u8 addr_ihl; + u8 mask_ihl; + struct { + u8 addr; + u8 mask; + } stat_drdy; + struct { + u8 en_addr; + u8 en_mask; + } ig1; }; /** - * struct st_sensors - ST sensors list + * struct st_sensor_settings - ST specific sensor settings * @wai: Contents of WhoAmI register. + * @wai_addr: The address of WhoAmI register. * @sensors_supported: List of supported sensors by struct itself. * @ch: IIO channels for the sensor. * @odr: Output data rate register and ODR list available. @@ -172,89 +195,106 @@ struct st_sensor_transfer_function { * @enable_axis: Enable one or more axis of the sensor. * @fs: Full scale register and full scale list available. * @bdu: Block data update register. + * @das: Data Alignment Selection register. * @drdy_irq: Data ready register of the sensor. + * @sim: SPI serial interface mode register of the sensor. * @multi_read_bit: Use or not particular bit for [I2C/SPI] multi-read. * @bootime: samples to discard when sensor passing from power-down to power-up. */ -struct st_sensors { +struct st_sensor_settings { u8 wai; + u8 wai_addr; char sensors_supported[ST_SENSORS_MAX_4WAI][ST_SENSORS_MAX_NAME]; struct iio_chan_spec *ch; + int num_ch; struct st_sensor_odr odr; struct st_sensor_power pw; struct st_sensor_axis enable_axis; struct st_sensor_fullscale fs; struct st_sensor_bdu bdu; + struct st_sensor_das das; struct st_sensor_data_ready_irq drdy_irq; + struct st_sensor_sim sim; bool multi_read_bit; unsigned int bootime; }; /** * struct st_sensor_data - ST sensor device status - * @dev: Pointer to instance of struct device (I2C or SPI). * @trig: The trigger in use by the core driver. - * @sensor: Pointer to the current sensor struct in use. + * @mount_matrix: The mounting matrix of the sensor. + * @sensor_settings: Pointer to the specific sensor settings in use. * @current_fullscale: Maximum range of measure by the sensor. + * @regmap: Pointer to specific sensor regmap configuration. * @enabled: Status of the sensor (false->off, true->on). - * @multiread_bit: Use or not particular bit for [I2C/SPI] multiread. - * @buffer_data: Data used by buffer part. * @odr: Output data rate of the sensor [Hz]. * num_data_channels: Number of data channels used in buffer. - * @get_irq_data_ready: Function to get the IRQ used for data ready signal. - * @tf: Transfer function structure used by I/O operations. - * @tb: Transfer buffers and mutex used by I/O operations. + * @drdy_int_pin: Redirect DRDY on pin 1 (1) or pin 2 (2). + * @int_pin_open_drain: Set the interrupt/DRDY to open drain. + * @irq: the IRQ number. + * @edge_irq: the IRQ triggers on edges and need special handling. + * @hw_irq_trigger: if we're using the hardware interrupt on the sensor. + * @hw_timestamp: Latest timestamp from the interrupt handler, when in use. + * @buffer_data: Data used by buffer part. + * @odr_lock: Local lock for preventing concurrent ODR accesses/changes */ struct st_sensor_data { - struct device *dev; struct iio_trigger *trig; - struct st_sensors *sensor; + struct iio_mount_matrix mount_matrix; + struct st_sensor_settings *sensor_settings; struct st_sensor_fullscale_avl *current_fullscale; + struct regmap *regmap; bool enabled; - bool multiread_bit; - - char *buffer_data; unsigned int odr; unsigned int num_data_channels; - unsigned int (*get_irq_data_ready) (struct iio_dev *indio_dev); + u8 drdy_int_pin; + bool int_pin_open_drain; + int irq; - const struct st_sensor_transfer_function *tf; - struct st_sensor_transfer_buffer tb; + bool edge_irq; + bool hw_irq_trigger; + s64 hw_timestamp; + + struct mutex odr_lock; + + char buffer_data[ST_SENSORS_MAX_BUFFER_SIZE] __aligned(IIO_DMA_MINALIGN); }; #ifdef CONFIG_IIO_BUFFER irqreturn_t st_sensors_trigger_handler(int irq, void *p); - -int st_sensors_get_buffer_element(struct iio_dev *indio_dev, u8 *buf); #endif #ifdef CONFIG_IIO_TRIGGER int st_sensors_allocate_trigger(struct iio_dev *indio_dev, const struct iio_trigger_ops *trigger_ops); -void st_sensors_deallocate_trigger(struct iio_dev *indio_dev); - +int st_sensors_validate_device(struct iio_trigger *trig, + struct iio_dev *indio_dev); #else static inline int st_sensors_allocate_trigger(struct iio_dev *indio_dev, const struct iio_trigger_ops *trigger_ops) { return 0; } -static inline void st_sensors_deallocate_trigger(struct iio_dev *indio_dev) -{ - return; -} +#define st_sensors_validate_device NULL #endif -int st_sensors_init_sensor(struct iio_dev *indio_dev); +int st_sensors_init_sensor(struct iio_dev *indio_dev, + struct st_sensors_platform_data *pdata); int st_sensors_set_enable(struct iio_dev *indio_dev, bool enable); int st_sensors_set_axis_enable(struct iio_dev *indio_dev, u8 axis_enable); +int st_sensors_power_enable(struct iio_dev *indio_dev); + +int st_sensors_debugfs_reg_access(struct iio_dev *indio_dev, + unsigned reg, unsigned writeval, + unsigned *readval); + int st_sensors_set_odr(struct iio_dev *indio_dev, unsigned int odr); int st_sensors_set_dataready_irq(struct iio_dev *indio_dev, bool enable); @@ -264,14 +304,11 @@ int st_sensors_set_fullscale_by_gain(struct iio_dev *indio_dev, int scale); int st_sensors_read_info_raw(struct iio_dev *indio_dev, struct iio_chan_spec const *ch, int *val); -int st_sensors_check_device_support(struct iio_dev *indio_dev, - int num_sensors_list, const struct st_sensors *sensors); - -ssize_t st_sensors_sysfs_get_sampling_frequency(struct device *dev, - struct device_attribute *attr, char *buf); +int st_sensors_get_settings_index(const char *name, + const struct st_sensor_settings *list, + const int list_length); -ssize_t st_sensors_sysfs_set_sampling_frequency(struct device *dev, - struct device_attribute *attr, const char *buf, size_t size); +int st_sensors_verify_id(struct iio_dev *indio_dev); ssize_t st_sensors_sysfs_sampling_frequency_avail(struct device *dev, struct device_attribute *attr, char *buf); @@ -279,4 +316,22 @@ ssize_t st_sensors_sysfs_sampling_frequency_avail(struct device *dev, ssize_t st_sensors_sysfs_scale_avail(struct device *dev, struct device_attribute *attr, char *buf); +void st_sensors_dev_name_probe(struct device *dev, char *name, int len); + +/* Accelerometer */ +const struct st_sensor_settings *st_accel_get_settings(const char *name); +int st_accel_common_probe(struct iio_dev *indio_dev); + +/* Gyroscope */ +const struct st_sensor_settings *st_gyro_get_settings(const char *name); +int st_gyro_common_probe(struct iio_dev *indio_dev); + +/* Magnetometer */ +const struct st_sensor_settings *st_magn_get_settings(const char *name); +int st_magn_common_probe(struct iio_dev *indio_dev); + +/* Pressure */ +const struct st_sensor_settings *st_press_get_settings(const char *name); +int st_press_common_probe(struct iio_dev *indio_dev); + #endif /* ST_SENSORS_H */ |