// SPDX-License-Identifier: GPL-2.0+ /* * si1133.c - Support for Silabs SI1133 combined ambient * light and UV index sensors * * Copyright 2018 Maxime Roussin-Belanger <[email protected]> */ #include <linux/delay.h> #include <linux/i2c.h> #include <linux/interrupt.h> #include <linux/module.h> #include <linux/regmap.h> #include <linux/iio/iio.h> #include <linux/iio/sysfs.h> #include <linux/util_macros.h> #include <linux/unaligned.h> #define SI1133_REG_PART_ID … #define SI1133_REG_REV_ID … #define SI1133_REG_MFR_ID … #define SI1133_REG_INFO0 … #define SI1133_REG_INFO1 … #define SI1133_PART_ID … #define SI1133_REG_HOSTIN0 … #define SI1133_REG_COMMAND … #define SI1133_REG_IRQ_ENABLE … #define SI1133_REG_RESPONSE1 … #define SI1133_REG_RESPONSE0 … #define SI1133_REG_IRQ_STATUS … #define SI1133_REG_MEAS_RATE … #define SI1133_IRQ_CHANNEL_ENABLE … #define SI1133_CMD_RESET_CTR … #define SI1133_CMD_RESET_SW … #define SI1133_CMD_FORCE … #define SI1133_CMD_START_AUTONOMOUS … #define SI1133_CMD_PARAM_SET … #define SI1133_CMD_PARAM_QUERY … #define SI1133_CMD_PARAM_MASK … #define SI1133_CMD_ERR_MASK … #define SI1133_CMD_SEQ_MASK … #define SI1133_MAX_CMD_CTR … #define SI1133_PARAM_REG_CHAN_LIST … #define SI1133_PARAM_REG_ADCCONFIG(x) … #define SI1133_PARAM_REG_ADCSENS(x) … #define SI1133_PARAM_REG_ADCPOST(x) … #define SI1133_ADCMUX_MASK … #define SI1133_ADCCONFIG_DECIM_RATE(x) … #define SI1133_ADCSENS_SCALE_MASK … #define SI1133_ADCSENS_SCALE_SHIFT … #define SI1133_ADCSENS_HSIG_MASK … #define SI1133_ADCSENS_HSIG_SHIFT … #define SI1133_ADCSENS_HW_GAIN_MASK … #define SI1133_ADCSENS_NB_MEAS(x) … #define SI1133_ADCPOST_24BIT_EN … #define SI1133_ADCPOST_POSTSHIFT_BITQTY(x) … #define SI1133_PARAM_ADCMUX_SMALL_IR … #define SI1133_PARAM_ADCMUX_MED_IR … #define SI1133_PARAM_ADCMUX_LARGE_IR … #define SI1133_PARAM_ADCMUX_WHITE … #define SI1133_PARAM_ADCMUX_LARGE_WHITE … #define SI1133_PARAM_ADCMUX_UV … #define SI1133_PARAM_ADCMUX_UV_DEEP … #define SI1133_ERR_INVALID_CMD … #define SI1133_ERR_INVALID_LOCATION_CMD … #define SI1133_ERR_SATURATION_ADC_OR_OVERFLOW_ACCUMULATION … #define SI1133_ERR_OUTPUT_BUFFER_OVERFLOW … #define SI1133_COMPLETION_TIMEOUT_MS … #define SI1133_CMD_MINSLEEP_US_LOW … #define SI1133_CMD_MINSLEEP_US_HIGH … #define SI1133_CMD_TIMEOUT_MS … #define SI1133_CMD_LUX_TIMEOUT_MS … #define SI1133_CMD_TIMEOUT_US … #define SI1133_REG_HOSTOUT(x) … #define SI1133_MEASUREMENT_FREQUENCY … #define SI1133_X_ORDER_MASK … #define SI1133_Y_ORDER_MASK … #define si1133_get_x_order(m) … #define si1133_get_y_order(m) … #define SI1133_LUX_ADC_MASK … #define SI1133_ADC_THRESHOLD … #define SI1133_INPUT_FRACTION_HIGH … #define SI1133_INPUT_FRACTION_LOW … #define SI1133_LUX_OUTPUT_FRACTION … #define SI1133_LUX_BUFFER_SIZE … #define SI1133_MEASURE_BUFFER_SIZE … static const int si1133_scale_available[] = …; static IIO_CONST_ATTR(scale_available, "1 2 4 8 16 32 64 128"); static IIO_CONST_ATTR_INT_TIME_AVAIL("0.0244 0.0488 0.0975 0.195 0.390 0.780 " "1.560 3.120 6.24 12.48 25.0 50.0"); /* A.K.A. HW_GAIN in datasheet */ enum si1133_int_time { … }; /* Integration time in milliseconds, nanoseconds */ static const int si1133_int_time_table[][2] = …; static const struct regmap_range si1133_reg_ranges[] = …; static const struct regmap_range si1133_reg_ro_ranges[] = …; static const struct regmap_range si1133_precious_ranges[] = …; static const struct regmap_access_table si1133_write_ranges_table = …; static const struct regmap_access_table si1133_read_ranges_table = …; static const struct regmap_access_table si1133_precious_table = …; static const struct regmap_config si1133_regmap_config = …; struct si1133_data { … }; struct si1133_coeff { … }; struct si1133_lux_coeff { … }; static const struct si1133_lux_coeff lux_coeff = …; static int si1133_calculate_polynomial_inner(s32 input, u8 fraction, u16 mag, s8 shift) { … } static int si1133_calculate_output(s32 x, s32 y, u8 x_order, u8 y_order, u8 input_fraction, s8 sign, const struct si1133_coeff *coeffs) { … } /* * The algorithm is from: * https://siliconlabs.github.io/Gecko_SDK_Doc/efm32zg/html/si1133_8c_source.html#l00716 */ static int si1133_calc_polynomial(s32 x, s32 y, u8 input_fraction, u8 num_coeff, const struct si1133_coeff *coeffs) { … } static int si1133_cmd_reset_sw(struct si1133_data *data) { … } static int si1133_parse_response_err(struct device *dev, u32 resp, u8 cmd) { … } static int si1133_cmd_reset_counter(struct si1133_data *data) { … } static int si1133_command(struct si1133_data *data, u8 cmd) { … } static int si1133_param_set(struct si1133_data *data, u8 param, u32 value) { … } static int si1133_param_query(struct si1133_data *data, u8 param, u32 *result) { … } #define SI1133_CHANNEL(_ch, _type) … \ static const struct iio_chan_spec si1133_channels[] = …; static int si1133_get_int_time_index(int milliseconds, int nanoseconds) { … } static int si1133_set_integration_time(struct si1133_data *data, u8 adc, int milliseconds, int nanoseconds) { … } static int si1133_set_chlist(struct si1133_data *data, u8 scan_mask) { … } static int si1133_chan_set_adcconfig(struct si1133_data *data, u8 adc, u8 adc_config) { … } static int si1133_update_adcconfig(struct si1133_data *data, uint8_t adc, u8 mask, u8 shift, u8 value) { … } static int si1133_set_adcmux(struct si1133_data *data, u8 adc, u8 mux) { … } static int si1133_force_measurement(struct si1133_data *data) { … } static int si1133_bulk_read(struct si1133_data *data, u8 start_reg, u8 length, u8 *buffer) { … } static int si1133_measure(struct si1133_data *data, struct iio_chan_spec const *chan, int *val) { … } static irqreturn_t si1133_threaded_irq_handler(int irq, void *private) { … } static int si1133_scale_to_swgain(int scale_integer, int scale_fractional) { … } static int si1133_chan_set_adcsens(struct si1133_data *data, u8 adc, u8 adc_sens) { … } static int si1133_update_adcsens(struct si1133_data *data, u8 mask, u8 shift, u8 value) { … } static int si1133_get_lux(struct si1133_data *data, int *val) { … } static int si1133_read_raw(struct iio_dev *iio_dev, struct iio_chan_spec const *chan, int *val, int *val2, long mask) { … } static int si1133_write_raw(struct iio_dev *iio_dev, struct iio_chan_spec const *chan, int val, int val2, long mask) { … } static struct attribute *si1133_attributes[] = …; static const struct attribute_group si1133_attribute_group = …; static const struct iio_info si1133_info = …; /* * si1133_init_lux_channels - Configure 3 different channels(adc) (1,2 and 3) * The channel configuration for the lux measurement was taken from : * https://siliconlabs.github.io/Gecko_SDK_Doc/efm32zg/html/si1133_8c_source.html#l00578 * * Reserved the channel 0 for the other raw measurements */ static int si1133_init_lux_channels(struct si1133_data *data) { … } static int si1133_initialize(struct si1133_data *data) { … } static int si1133_validate_ids(struct iio_dev *iio_dev) { … } static int si1133_probe(struct i2c_client *client) { … } static const struct i2c_device_id si1133_ids[] = …; MODULE_DEVICE_TABLE(i2c, si1133_ids); static struct i2c_driver si1133_driver = …; module_i2c_driver(…) …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …;
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