diff options
Diffstat (limited to 'include/linux/iio')
| -rw-r--r-- | include/linux/iio/buffer.h | 13 | ||||
| -rw-r--r-- | include/linux/iio/common/st_sensors.h | 280 | ||||
| -rw-r--r-- | include/linux/iio/common/st_sensors_i2c.h | 20 | ||||
| -rw-r--r-- | include/linux/iio/common/st_sensors_spi.h | 20 | ||||
| -rw-r--r-- | include/linux/iio/consumer.h | 14 | ||||
| -rw-r--r-- | include/linux/iio/driver.h | 9 | ||||
| -rw-r--r-- | include/linux/iio/gyro/itg3200.h | 154 | ||||
| -rw-r--r-- | include/linux/iio/trigger.h | 5 |
8 files changed, 490 insertions, 25 deletions
diff --git a/include/linux/iio/buffer.h b/include/linux/iio/buffer.h index f3eea18fdf4..2bac0eb8948 100644 --- a/include/linux/iio/buffer.h +++ b/include/linux/iio/buffer.h @@ -103,19 +103,6 @@ int iio_update_buffers(struct iio_dev *indio_dev, **/ void iio_buffer_init(struct iio_buffer *buffer); -/** - * __iio_update_buffer() - update common elements of buffers - * @buffer: buffer that is the event source - * @bytes_per_datum: size of individual datum including timestamp - * @length: number of datums in buffer - **/ -static inline void __iio_update_buffer(struct iio_buffer *buffer, - int bytes_per_datum, int length) -{ - buffer->bytes_per_datum = bytes_per_datum; - buffer->length = length; -} - int iio_scan_mask_query(struct iio_dev *indio_dev, struct iio_buffer *buffer, int bit); diff --git a/include/linux/iio/common/st_sensors.h b/include/linux/iio/common/st_sensors.h new file mode 100644 index 00000000000..1f86a97ab2e --- /dev/null +++ b/include/linux/iio/common/st_sensors.h @@ -0,0 +1,280 @@ +/* + * STMicroelectronics sensors library driver + * + * Copyright 2012-2013 STMicroelectronics Inc. + * + * Denis Ciocca <denis.ciocca@st.com> + * + * Licensed under the GPL-2. + */ + +#ifndef ST_SENSORS_H +#define ST_SENSORS_H + +#include <linux/i2c.h> +#include <linux/spi/spi.h> +#include <linux/irqreturn.h> +#include <linux/iio/trigger.h> + +#define ST_SENSORS_TX_MAX_LENGTH 2 +#define ST_SENSORS_RX_MAX_LENGTH 6 + +#define ST_SENSORS_ODR_LIST_MAX 10 +#define ST_SENSORS_FULLSCALE_AVL_MAX 10 + +#define ST_SENSORS_NUMBER_ALL_CHANNELS 4 +#define ST_SENSORS_NUMBER_DATA_CHANNELS 3 +#define ST_SENSORS_ENABLE_ALL_AXIS 0x07 +#define ST_SENSORS_BYTE_FOR_CHANNEL 2 +#define ST_SENSORS_SCAN_X 0 +#define ST_SENSORS_SCAN_Y 1 +#define ST_SENSORS_SCAN_Z 2 +#define ST_SENSORS_DEFAULT_12_REALBITS 12 +#define ST_SENSORS_DEFAULT_16_REALBITS 16 +#define ST_SENSORS_DEFAULT_POWER_ON_VALUE 0x01 +#define ST_SENSORS_DEFAULT_POWER_OFF_VALUE 0x00 +#define ST_SENSORS_DEFAULT_WAI_ADDRESS 0x0f +#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_MAX_NAME 17 +#define ST_SENSORS_MAX_4WAI 7 + +#define ST_SENSORS_LSM_CHANNELS(device_type, index, mod, endian, bits, addr) \ +{ \ + .type = device_type, \ + .modified = 1, \ + .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT | \ + IIO_CHAN_INFO_SCALE_SEPARATE_BIT, \ + .scan_index = index, \ + .channel2 = mod, \ + .address = addr, \ + .scan_type = { \ + .sign = 's', \ + .realbits = bits, \ + .shift = 16 - bits, \ + .storagebits = 16, \ + .endianness = endian, \ + }, \ +} + +#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_DEV_ATTR_SAMP_FREQ_AVAIL() \ + IIO_DEV_ATTR_SAMP_FREQ_AVAIL( \ + st_sensors_sysfs_sampling_frequency_avail) + +#define ST_SENSORS_DEV_ATTR_SCALE_AVAIL(name) \ + IIO_DEVICE_ATTR(name, S_IRUGO, \ + st_sensors_sysfs_scale_avail, NULL , 0); + +struct st_sensor_odr_avl { + unsigned int hz; + u8 value; +}; + +struct st_sensor_odr { + u8 addr; + u8 mask; + struct st_sensor_odr_avl odr_avl[ST_SENSORS_ODR_LIST_MAX]; +}; + +struct st_sensor_power { + u8 addr; + u8 mask; + u8 value_off; + u8 value_on; +}; + +struct st_sensor_axis { + u8 addr; + u8 mask; +}; + +struct st_sensor_fullscale_avl { + unsigned int num; + u8 value; + unsigned int gain; + unsigned int gain2; +}; + +struct st_sensor_fullscale { + u8 addr; + u8 mask; + struct st_sensor_fullscale_avl fs_avl[ST_SENSORS_FULLSCALE_AVL_MAX]; +}; + +/** + * struct st_sensor_bdu - ST sensor device block data update + * @addr: address of the register. + * @mask: mask to write the block data update flag. + */ +struct st_sensor_bdu { + u8 addr; + u8 mask; +}; + +/** + * struct st_sensor_data_ready_irq - ST sensor device data-ready interrupt + * @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. + */ +struct st_sensor_data_ready_irq { + 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_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_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_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_sensors - ST sensors list + * @wai: Contents 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. + * @pw: Power register of the sensor. + * @enable_axis: Enable one or more axis of the sensor. + * @fs: Full scale register and full scale list available. + * @bdu: Block data update register. + * @drdy_irq: Data ready 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 { + u8 wai; + char sensors_supported[ST_SENSORS_MAX_4WAI][ST_SENSORS_MAX_NAME]; + struct iio_chan_spec *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_data_ready_irq drdy_irq; + 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. + * @current_fullscale: Maximum range of measure by the sensor. + * @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]. + * @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. + */ +struct st_sensor_data { + struct device *dev; + struct iio_trigger *trig; + struct st_sensors *sensor; + struct st_sensor_fullscale_avl *current_fullscale; + + bool enabled; + bool multiread_bit; + + char *buffer_data; + + unsigned int odr; + + unsigned int (*get_irq_data_ready) (struct iio_dev *indio_dev); + + const struct st_sensor_transfer_function *tf; + struct st_sensor_transfer_buffer tb; +}; + +#ifdef CONFIG_IIO_BUFFER +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); + +irqreturn_t st_sensors_trigger_handler(int irq, void *p); + +int st_sensors_get_buffer_element(struct iio_dev *indio_dev, u8 *buf); +#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; +} +#endif + +int st_sensors_init_sensor(struct iio_dev *indio_dev); + +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_set_odr(struct iio_dev *indio_dev, unsigned int odr); + +int st_sensors_set_dataready_irq(struct iio_dev *indio_dev, bool enable); + +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); + +ssize_t st_sensors_sysfs_set_sampling_frequency(struct device *dev, + struct device_attribute *attr, const char *buf, size_t size); + +ssize_t st_sensors_sysfs_sampling_frequency_avail(struct device *dev, + struct device_attribute *attr, char *buf); + +ssize_t st_sensors_sysfs_scale_avail(struct device *dev, + struct device_attribute *attr, char *buf); + +#endif /* ST_SENSORS_H */ diff --git a/include/linux/iio/common/st_sensors_i2c.h b/include/linux/iio/common/st_sensors_i2c.h new file mode 100644 index 00000000000..67d845385ae --- /dev/null +++ b/include/linux/iio/common/st_sensors_i2c.h @@ -0,0 +1,20 @@ +/* + * STMicroelectronics sensors i2c library driver + * + * Copyright 2012-2013 STMicroelectronics Inc. + * + * Denis Ciocca <denis.ciocca@st.com> + * + * Licensed under the GPL-2. + */ + +#ifndef ST_SENSORS_I2C_H +#define ST_SENSORS_I2C_H + +#include <linux/i2c.h> +#include <linux/iio/common/st_sensors.h> + +void st_sensors_i2c_configure(struct iio_dev *indio_dev, + struct i2c_client *client, struct st_sensor_data *sdata); + +#endif /* ST_SENSORS_I2C_H */ diff --git a/include/linux/iio/common/st_sensors_spi.h b/include/linux/iio/common/st_sensors_spi.h new file mode 100644 index 00000000000..d964a3563dc --- /dev/null +++ b/include/linux/iio/common/st_sensors_spi.h @@ -0,0 +1,20 @@ +/* + * STMicroelectronics sensors spi library driver + * + * Copyright 2012-2013 STMicroelectronics Inc. + * + * Denis Ciocca <denis.ciocca@st.com> + * + * Licensed under the GPL-2. + */ + +#ifndef ST_SENSORS_SPI_H +#define ST_SENSORS_SPI_H + +#include <linux/spi/spi.h> +#include <linux/iio/common/st_sensors.h> + +void st_sensors_spi_configure(struct iio_dev *indio_dev, + struct spi_device *spi, struct st_sensor_data *sdata); + +#endif /* ST_SENSORS_SPI_H */ diff --git a/include/linux/iio/consumer.h b/include/linux/iio/consumer.h index 16c35ac045b..833926c91aa 100644 --- a/include/linux/iio/consumer.h +++ b/include/linux/iio/consumer.h @@ -15,6 +15,7 @@ struct iio_dev; struct iio_chan_spec; +struct device; /** * struct iio_channel - everything needed for a consumer to use a channel @@ -30,14 +31,15 @@ struct iio_channel { /** * iio_channel_get() - get description of all that is needed to access channel. - * @name: Unique name of the device as provided in the iio_map + * @dev: Pointer to consumer device. Device name must match + * the name of the device as provided in the iio_map * with which the desired provider to consumer mapping * was registered. * @consumer_channel: Unique name to identify the channel on the consumer * side. This typically describes the channels use within * the consumer. E.g. 'battery_voltage' */ -struct iio_channel *iio_channel_get(const char *name, +struct iio_channel *iio_channel_get(struct device *dev, const char *consumer_channel); /** @@ -48,14 +50,14 @@ void iio_channel_release(struct iio_channel *chan); /** * iio_channel_get_all() - get all channels associated with a client - * @name: name of consumer device. + * @dev: Pointer to consumer device. * * Returns an array of iio_channel structures terminated with one with * null iio_dev pointer. * This function is used by fairly generic consumers to get all the * channels registered as having this consumer. */ -struct iio_channel *iio_channel_get_all(const char *name); +struct iio_channel *iio_channel_get_all(struct device *dev); /** * iio_channel_release_all() - reverse iio_channel_get_all @@ -66,7 +68,7 @@ void iio_channel_release_all(struct iio_channel *chan); struct iio_cb_buffer; /** * iio_channel_get_all_cb() - register callback for triggered capture - * @name: Name of client device. + * @dev: Pointer to client device. * @cb: Callback function. * @private: Private data passed to callback. * @@ -74,7 +76,7 @@ struct iio_cb_buffer; * So if the channels requested come from different devices this will * fail. */ -struct iio_cb_buffer *iio_channel_get_all_cb(const char *name, +struct iio_cb_buffer *iio_channel_get_all_cb(struct device *dev, int (*cb)(u8 *data, void *private), void *private); diff --git a/include/linux/iio/driver.h b/include/linux/iio/driver.h index a4f8b2e05af..7dfb10ee266 100644 --- a/include/linux/iio/driver.h +++ b/include/linux/iio/driver.h @@ -22,13 +22,10 @@ int iio_map_array_register(struct iio_dev *indio_dev, struct iio_map *map); /** - * iio_map_array_unregister() - tell the core to remove consumer mappings + * iio_map_array_unregister() - tell the core to remove consumer mappings for + * the given provider device * @indio_dev: provider device - * @map: array of mappings to remove. Note these must have same memory - * addresses as those originally added not just equal parameter - * values. */ -int iio_map_array_unregister(struct iio_dev *indio_dev, - struct iio_map *map); +int iio_map_array_unregister(struct iio_dev *indio_dev); #endif diff --git a/include/linux/iio/gyro/itg3200.h b/include/linux/iio/gyro/itg3200.h new file mode 100644 index 00000000000..c53f16914b7 --- /dev/null +++ b/include/linux/iio/gyro/itg3200.h @@ -0,0 +1,154 @@ +/* + * itg3200.h -- support InvenSense ITG3200 + * Digital 3-Axis Gyroscope driver + * + * Copyright (c) 2011 Christian Strobel <christian.strobel@iis.fraunhofer.de> + * Copyright (c) 2011 Manuel Stahl <manuel.stahl@iis.fraunhofer.de> + * Copyright (c) 2012 Thorsten Nowak <thorsten.nowak@iis.fraunhofer.de> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#ifndef I2C_ITG3200_H_ +#define I2C_ITG3200_H_ + +#include <linux/iio/iio.h> + +/* Register with I2C address (34h) */ +#define ITG3200_REG_ADDRESS 0x00 + +/* Sample rate divider + * Range: 0 to 255 + * Default value: 0x00 */ +#define ITG3200_REG_SAMPLE_RATE_DIV 0x15 + +/* Digital low pass filter settings */ +#define ITG3200_REG_DLPF 0x16 +/* DLPF full scale range */ +#define ITG3200_DLPF_FS_SEL_2000 0x18 +/* Bandwidth (Hz) and internal sample rate + * (kHz) of DLPF */ +#define ITG3200_DLPF_256_8 0x00 +#define ITG3200_DLPF_188_1 0x01 +#define ITG3200_DLPF_98_1 0x02 +#define ITG3200_DLPF_42_1 0x03 +#define ITG3200_DLPF_20_1 0x04 +#define ITG3200_DLPF_10_1 0x05 +#define ITG3200_DLPF_5_1 0x06 + +#define ITG3200_DLPF_CFG_MASK 0x07 + +/* Configuration for interrupt operations */ +#define ITG3200_REG_IRQ_CONFIG 0x17 +/* Logic level */ +#define ITG3200_IRQ_ACTIVE_LOW 0x80 +#define ITG3200_IRQ_ACTIVE_HIGH 0x00 +/* Drive type */ +#define ITG3200_IRQ_OPEN_DRAIN 0x40 +#define ITG3200_IRQ_PUSH_PULL 0x00 +/* Latch mode */ +#define ITG3200_IRQ_LATCH_UNTIL_CLEARED 0x20 +#define ITG3200_IRQ_LATCH_50US_PULSE 0x00 +/* Latch clear method */ +#define ITG3200_IRQ_LATCH_CLEAR_ANY 0x10 +#define ITG3200_IRQ_LATCH_CLEAR_STATUS 0x00 +/* Enable interrupt when device is ready */ +#define ITG3200_IRQ_DEVICE_RDY_ENABLE 0x04 +/* Enable interrupt when data is available */ +#define ITG3200_IRQ_DATA_RDY_ENABLE 0x01 + +/* Determine the status of ITG-3200 interrupts */ +#define ITG3200_REG_IRQ_STATUS 0x1A +/* Status of 'device is ready'-interrupt */ +#define ITG3200_IRQ_DEVICE_RDY_STATUS 0x04 +/* Status of 'data is available'-interrupt */ +#define ITG3200_IRQ_DATA_RDY_STATUS 0x01 + +/* Sensor registers */ +#define ITG3200_REG_TEMP_OUT_H 0x1B +#define ITG3200_REG_TEMP_OUT_L 0x1C +#define ITG3200_REG_GYRO_XOUT_H 0x1D +#define ITG3200_REG_GYRO_XOUT_L 0x1E +#define ITG3200_REG_GYRO_YOUT_H 0x1F +#define ITG3200_REG_GYRO_YOUT_L 0x20 +#define ITG3200_REG_GYRO_ZOUT_H 0x21 +#define ITG3200_REG_GYRO_ZOUT_L 0x22 + +/* Power management */ +#define ITG3200_REG_POWER_MANAGEMENT 0x3E +/* Reset device and internal registers to the + * power-up-default settings */ +#define ITG3200_RESET 0x80 +/* Enable low power sleep mode */ +#define ITG3200_SLEEP 0x40 +/* Put according gyroscope in standby mode */ +#define ITG3200_STANDBY_GYRO_X 0x20 +#define ITG3200_STANDBY_GYRO_Y 0x10 +#define ITG3200_STANDBY_GYRO_Z 0x08 +/* Determine the device clock source */ +#define ITG3200_CLK_INTERNAL 0x00 +#define ITG3200_CLK_GYRO_X 0x01 +#define ITG3200_CLK_GYRO_Y 0x02 +#define ITG3200_CLK_GYRO_Z 0x03 +#define ITG3200_CLK_EXT_32K 0x04 +#define ITG3200_CLK_EXT_19M 0x05 + + +/** + * struct itg3200 - device instance specific data + * @i2c: actual i2c_client + * @trig: data ready trigger from itg3200 pin + **/ +struct itg3200 { + struct i2c_client *i2c; + struct iio_trigger *trig; +}; + +enum ITG3200_SCAN_INDEX { + ITG3200_SCAN_TEMP, + ITG3200_SCAN_GYRO_X, + ITG3200_SCAN_GYRO_Y, + ITG3200_SCAN_GYRO_Z, + ITG3200_SCAN_ELEMENTS, +}; + +int itg3200_write_reg_8(struct iio_dev *indio_dev, + u8 reg_address, u8 val); + +int itg3200_read_reg_8(struct iio_dev *indio_dev, + u8 reg_address, u8 *val); + + +#ifdef CONFIG_IIO_BUFFER + +void itg3200_remove_trigger(struct iio_dev *indio_dev); +int itg3200_probe_trigger(struct iio_dev *indio_dev); + +int itg3200_buffer_configure(struct iio_dev *indio_dev); +void itg3200_buffer_unconfigure(struct iio_dev *indio_dev); + +#else /* CONFIG_IIO_BUFFER */ + +static inline void itg3200_remove_trigger(struct iio_dev *indio_dev) +{ +} + +static inline int itg3200_probe_trigger(struct iio_dev *indio_dev) +{ + return 0; +} + +static inline int itg3200_buffer_configure(struct iio_dev *indio_dev) +{ + return 0; +} + +static inline void itg3200_buffer_unconfigure(struct iio_dev *indio_dev) +{ +} + +#endif /* CONFIG_IIO_RING_BUFFER */ + +#endif /* ITG3200_H_ */ diff --git a/include/linux/iio/trigger.h b/include/linux/iio/trigger.h index 20239da1d0f..c66e0a96f6e 100644 --- a/include/linux/iio/trigger.h +++ b/include/linux/iio/trigger.h @@ -12,6 +12,7 @@ #ifndef _IIO_TRIGGER_H_ #define _IIO_TRIGGER_H_ +#ifdef CONFIG_IIO_TRIGGER struct iio_subirq { bool enabled; }; @@ -117,4 +118,8 @@ irqreturn_t iio_trigger_generic_data_rdy_poll(int irq, void *private); __printf(1, 2) struct iio_trigger *iio_trigger_alloc(const char *fmt, ...); void iio_trigger_free(struct iio_trigger *trig); +#else +struct iio_trigger; +struct iio_trigger_ops; +#endif #endif /* _IIO_TRIGGER_H_ */ |