// SPDX-License-Identifier: GPL-2.0-only /* * si1145.c - Support for Silabs SI1132 and SI1141/2/3/5/6/7 combined ambient * light, UV index and proximity sensors * * Copyright 2014-16 Peter Meerwald-Stadler <[email protected]> * Copyright 2016 Crestez Dan Leonard <[email protected]> * * SI1132 (7-bit I2C slave address 0x60) * SI1141/2/3 (7-bit I2C slave address 0x5a) * SI1145/6/6 (7-bit I2C slave address 0x60) */ #include <linux/module.h> #include <linux/i2c.h> #include <linux/err.h> #include <linux/slab.h> #include <linux/delay.h> #include <linux/irq.h> #include <linux/iio/iio.h> #include <linux/iio/sysfs.h> #include <linux/iio/trigger.h> #include <linux/iio/trigger_consumer.h> #include <linux/iio/triggered_buffer.h> #include <linux/iio/buffer.h> #include <linux/util_macros.h> #define SI1145_REG_PART_ID … #define SI1145_REG_REV_ID … #define SI1145_REG_SEQ_ID … #define SI1145_REG_INT_CFG … #define SI1145_REG_IRQ_ENABLE … #define SI1145_REG_IRQ_MODE … #define SI1145_REG_HW_KEY … #define SI1145_REG_MEAS_RATE … #define SI1145_REG_PS_LED21 … #define SI1145_REG_PS_LED3 … #define SI1145_REG_UCOEF1 … #define SI1145_REG_UCOEF2 … #define SI1145_REG_UCOEF3 … #define SI1145_REG_UCOEF4 … #define SI1145_REG_PARAM_WR … #define SI1145_REG_COMMAND … #define SI1145_REG_RESPONSE … #define SI1145_REG_IRQ_STATUS … #define SI1145_REG_ALSVIS_DATA … #define SI1145_REG_ALSIR_DATA … #define SI1145_REG_PS1_DATA … #define SI1145_REG_PS2_DATA … #define SI1145_REG_PS3_DATA … #define SI1145_REG_AUX_DATA … #define SI1145_REG_PARAM_RD … #define SI1145_REG_CHIP_STAT … #define SI1145_UCOEF1_DEFAULT … #define SI1145_UCOEF2_DEFAULT … #define SI1145_UCOEF3_DEFAULT … #define SI1145_UCOEF4_DEFAULT … /* Helper to figure out PS_LED register / shift per channel */ #define SI1145_PS_LED_REG(ch) … #define SI1145_PS_LED_SHIFT(ch) … /* Parameter offsets */ #define SI1145_PARAM_CHLIST … #define SI1145_PARAM_PSLED12_SELECT … #define SI1145_PARAM_PSLED3_SELECT … #define SI1145_PARAM_PS_ENCODING … #define SI1145_PARAM_ALS_ENCODING … #define SI1145_PARAM_PS1_ADC_MUX … #define SI1145_PARAM_PS2_ADC_MUX … #define SI1145_PARAM_PS3_ADC_MUX … #define SI1145_PARAM_PS_ADC_COUNTER … #define SI1145_PARAM_PS_ADC_GAIN … #define SI1145_PARAM_PS_ADC_MISC … #define SI1145_PARAM_ALS_ADC_MUX … #define SI1145_PARAM_ALSIR_ADC_MUX … #define SI1145_PARAM_AUX_ADC_MUX … #define SI1145_PARAM_ALSVIS_ADC_COUNTER … #define SI1145_PARAM_ALSVIS_ADC_GAIN … #define SI1145_PARAM_ALSVIS_ADC_MISC … #define SI1145_PARAM_LED_RECOVERY … #define SI1145_PARAM_ALSIR_ADC_COUNTER … #define SI1145_PARAM_ALSIR_ADC_GAIN … #define SI1145_PARAM_ALSIR_ADC_MISC … #define SI1145_PARAM_ADC_OFFSET … /* Channel enable masks for CHLIST parameter */ #define SI1145_CHLIST_EN_PS1 … #define SI1145_CHLIST_EN_PS2 … #define SI1145_CHLIST_EN_PS3 … #define SI1145_CHLIST_EN_ALSVIS … #define SI1145_CHLIST_EN_ALSIR … #define SI1145_CHLIST_EN_AUX … #define SI1145_CHLIST_EN_UV … /* Proximity measurement mode for ADC_MISC parameter */ #define SI1145_PS_ADC_MODE_NORMAL … /* Signal range mask for ADC_MISC parameter */ #define SI1145_ADC_MISC_RANGE … /* Commands for REG_COMMAND */ #define SI1145_CMD_NOP … #define SI1145_CMD_RESET … #define SI1145_CMD_PS_FORCE … #define SI1145_CMD_ALS_FORCE … #define SI1145_CMD_PSALS_FORCE … #define SI1145_CMD_PS_PAUSE … #define SI1145_CMD_ALS_PAUSE … #define SI1145_CMD_PSALS_PAUSE … #define SI1145_CMD_PS_AUTO … #define SI1145_CMD_ALS_AUTO … #define SI1145_CMD_PSALS_AUTO … #define SI1145_CMD_PARAM_QUERY … #define SI1145_CMD_PARAM_SET … #define SI1145_RSP_INVALID_SETTING … #define SI1145_RSP_COUNTER_MASK … /* Minimum sleep after each command to ensure it's received */ #define SI1145_COMMAND_MINSLEEP_MS … /* Return -ETIMEDOUT after this long */ #define SI1145_COMMAND_TIMEOUT_MS … /* Interrupt configuration masks for INT_CFG register */ #define SI1145_INT_CFG_OE … #define SI1145_INT_CFG_MODE … /* Interrupt enable masks for IRQ_ENABLE register */ #define SI1145_MASK_ALL_IE … #define SI1145_MUX_TEMP … #define SI1145_MUX_VDD … /* Proximity LED current; see Table 2 in datasheet */ #define SI1145_LED_CURRENT_45mA … enum { … }; struct si1145_part_info { … }; /** * struct si1145_data - si1145 chip state data * @client: I2C client * @lock: mutex to protect shared state. * @cmdlock: Low-level mutex to protect command execution only * @rsp_seq: Next expected response number or -1 if counter reset required * @scan_mask: Saved scan mask to avoid duplicate set_chlist * @autonomous: If automatic measurements are active (for buffer support) * @part_info: Part information * @trig: Pointer to iio trigger * @meas_rate: Value of MEAS_RATE register. Only set in HW in auto mode * @buffer: Used to pack data read from sensor. */ struct si1145_data { … }; /* * __si1145_command_reset() - Send CMD_NOP and wait for response 0 * * Does not modify data->rsp_seq * * Return: 0 on success and -errno on error. */ static int __si1145_command_reset(struct si1145_data *data) { … } /* * si1145_command() - Execute a command and poll the response register * * All conversion overflows are reported as -EOVERFLOW * INVALID_SETTING is reported as -EINVAL * Timeouts are reported as -ETIMEDOUT * * Return: 0 on success or -errno on failure */ static int si1145_command(struct si1145_data *data, u8 cmd) { … } static int si1145_param_update(struct si1145_data *data, u8 op, u8 param, u8 value) { … } static int si1145_param_set(struct si1145_data *data, u8 param, u8 value) { … } /* Set param. Returns negative errno or current value */ static int si1145_param_query(struct si1145_data *data, u8 param) { … } /* Expand 8 bit compressed value to 16 bit, see Silabs AN498 */ static u16 si1145_uncompress(u8 x) { … } /* Compress 16 bit value to 8 bit, see Silabs AN498 */ static u8 si1145_compress(u16 x) { … } /* Write meas_rate in hardware */ static int si1145_set_meas_rate(struct si1145_data *data, int interval) { … } static int si1145_read_samp_freq(struct si1145_data *data, int *val, int *val2) { … } /* Set the samp freq in driver private data */ static int si1145_store_samp_freq(struct si1145_data *data, int val) { … } static irqreturn_t si1145_trigger_handler(int irq, void *private) { … } static int si1145_set_chlist(struct iio_dev *indio_dev, unsigned long scan_mask) { … } static int si1145_measure(struct iio_dev *indio_dev, struct iio_chan_spec const *chan) { … } /* * Conversion between iio scale and ADC_GAIN values * These could be further adjusted but proximity/intensity are dimensionless */ static const int si1145_proximity_scale_available[] = …; static const int si1145_intensity_scale_available[] = …; static IIO_CONST_ATTR(in_proximity_scale_available, "128 64 32 16 8 4"); static IIO_CONST_ATTR(in_intensity_scale_available, "128 64 32 16 8 4 2 1"); static IIO_CONST_ATTR(in_intensity_ir_scale_available, "128 64 32 16 8 4 2 1"); static int si1145_scale_from_adcgain(int regval) { … } static int si1145_proximity_adcgain_from_scale(int val, int val2) { … } static int si1145_intensity_adcgain_from_scale(int val, int val2) { … } static int si1145_read_raw(struct iio_dev *indio_dev, struct iio_chan_spec const *chan, int *val, int *val2, long mask) { … } static int si1145_write_raw(struct iio_dev *indio_dev, struct iio_chan_spec const *chan, int val, int val2, long mask) { … } #define SI1145_ST … #define SI1145_INTENSITY_CHANNEL(_si) … #define SI1145_INTENSITY_IR_CHANNEL(_si) … #define SI1145_TEMP_CHANNEL(_si) … #define SI1145_UV_CHANNEL(_si) … #define SI1145_PROXIMITY_CHANNEL(_si, _ch) … #define SI1145_VOLTAGE_CHANNEL(_si) … #define SI1145_CURRENT_CHANNEL(_ch) … static const struct iio_chan_spec si1132_channels[] = …; static const struct iio_chan_spec si1141_channels[] = …; static const struct iio_chan_spec si1142_channels[] = …; static const struct iio_chan_spec si1143_channels[] = …; static const struct iio_chan_spec si1145_channels[] = …; static const struct iio_chan_spec si1146_channels[] = …; static const struct iio_chan_spec si1147_channels[] = …; static struct attribute *si1132_attributes[] = …; static struct attribute *si114x_attributes[] = …; static const struct attribute_group si1132_attribute_group = …; static const struct attribute_group si114x_attribute_group = …; static const struct iio_info si1132_info = …; static const struct iio_info si114x_info = …; #define SI1145_PART(id, iio_info, chans, leds, uncompressed_meas_rate) … static const struct si1145_part_info si1145_part_info[] = …; static int si1145_initialize(struct si1145_data *data) { … } /* * Program the channels we want to measure with CMD_PSALS_AUTO. No need for * _postdisable as we stop with CMD_PSALS_PAUSE; single measurement (direct) * mode reprograms the channels list anyway... */ static int si1145_buffer_preenable(struct iio_dev *indio_dev) { … } static bool si1145_validate_scan_mask(struct iio_dev *indio_dev, const unsigned long *scan_mask) { … } static const struct iio_buffer_setup_ops si1145_buffer_setup_ops = …; /* * si1145_trigger_set_state() - Set trigger state * * When not using triggers interrupts are disabled and measurement rate is * set to zero in order to minimize power consumption. */ static int si1145_trigger_set_state(struct iio_trigger *trig, bool state) { … } static const struct iio_trigger_ops si1145_trigger_ops = …; static int si1145_probe_trigger(struct iio_dev *indio_dev) { … } static int si1145_probe(struct i2c_client *client) { … } static const struct i2c_device_id si1145_ids[] = …; MODULE_DEVICE_TABLE(i2c, si1145_ids); static struct i2c_driver si1145_driver = …; module_i2c_driver(…) …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …;
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