1364 lines
34 KiB
C
1364 lines
34 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* si1145.c - Support for Silabs SI1132 and SI1141/2/3/5/6/7 combined ambient
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* light, UV index and proximity sensors
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*
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* Copyright 2014-16 Peter Meerwald-Stadler <pmeerw@pmeerw.net>
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* Copyright 2016 Crestez Dan Leonard <leonard.crestez@intel.com>
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*
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* SI1132 (7-bit I2C slave address 0x60)
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* SI1141/2/3 (7-bit I2C slave address 0x5a)
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* SI1145/6/6 (7-bit I2C slave address 0x60)
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*/
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#include <linux/module.h>
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#include <linux/i2c.h>
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#include <linux/err.h>
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#include <linux/slab.h>
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#include <linux/delay.h>
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#include <linux/irq.h>
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#include <linux/iio/iio.h>
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#include <linux/iio/sysfs.h>
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#include <linux/iio/trigger.h>
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#include <linux/iio/trigger_consumer.h>
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#include <linux/iio/triggered_buffer.h>
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#include <linux/iio/buffer.h>
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#include <linux/util_macros.h>
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#define SI1145_REG_PART_ID 0x00
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#define SI1145_REG_REV_ID 0x01
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#define SI1145_REG_SEQ_ID 0x02
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#define SI1145_REG_INT_CFG 0x03
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#define SI1145_REG_IRQ_ENABLE 0x04
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#define SI1145_REG_IRQ_MODE 0x05
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#define SI1145_REG_HW_KEY 0x07
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#define SI1145_REG_MEAS_RATE 0x08
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#define SI1145_REG_PS_LED21 0x0f
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#define SI1145_REG_PS_LED3 0x10
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#define SI1145_REG_UCOEF1 0x13
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#define SI1145_REG_UCOEF2 0x14
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#define SI1145_REG_UCOEF3 0x15
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#define SI1145_REG_UCOEF4 0x16
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#define SI1145_REG_PARAM_WR 0x17
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#define SI1145_REG_COMMAND 0x18
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#define SI1145_REG_RESPONSE 0x20
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#define SI1145_REG_IRQ_STATUS 0x21
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#define SI1145_REG_ALSVIS_DATA 0x22
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#define SI1145_REG_ALSIR_DATA 0x24
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#define SI1145_REG_PS1_DATA 0x26
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#define SI1145_REG_PS2_DATA 0x28
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#define SI1145_REG_PS3_DATA 0x2a
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#define SI1145_REG_AUX_DATA 0x2c
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#define SI1145_REG_PARAM_RD 0x2e
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#define SI1145_REG_CHIP_STAT 0x30
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#define SI1145_UCOEF1_DEFAULT 0x7b
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#define SI1145_UCOEF2_DEFAULT 0x6b
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#define SI1145_UCOEF3_DEFAULT 0x01
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#define SI1145_UCOEF4_DEFAULT 0x00
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/* Helper to figure out PS_LED register / shift per channel */
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#define SI1145_PS_LED_REG(ch) \
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(((ch) == 2) ? SI1145_REG_PS_LED3 : SI1145_REG_PS_LED21)
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#define SI1145_PS_LED_SHIFT(ch) \
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(((ch) == 1) ? 4 : 0)
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/* Parameter offsets */
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#define SI1145_PARAM_CHLIST 0x01
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#define SI1145_PARAM_PSLED12_SELECT 0x02
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#define SI1145_PARAM_PSLED3_SELECT 0x03
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#define SI1145_PARAM_PS_ENCODING 0x05
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#define SI1145_PARAM_ALS_ENCODING 0x06
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#define SI1145_PARAM_PS1_ADC_MUX 0x07
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#define SI1145_PARAM_PS2_ADC_MUX 0x08
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#define SI1145_PARAM_PS3_ADC_MUX 0x09
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#define SI1145_PARAM_PS_ADC_COUNTER 0x0a
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#define SI1145_PARAM_PS_ADC_GAIN 0x0b
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#define SI1145_PARAM_PS_ADC_MISC 0x0c
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#define SI1145_PARAM_ALS_ADC_MUX 0x0d
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#define SI1145_PARAM_ALSIR_ADC_MUX 0x0e
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#define SI1145_PARAM_AUX_ADC_MUX 0x0f
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#define SI1145_PARAM_ALSVIS_ADC_COUNTER 0x10
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#define SI1145_PARAM_ALSVIS_ADC_GAIN 0x11
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#define SI1145_PARAM_ALSVIS_ADC_MISC 0x12
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#define SI1145_PARAM_LED_RECOVERY 0x1c
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#define SI1145_PARAM_ALSIR_ADC_COUNTER 0x1d
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#define SI1145_PARAM_ALSIR_ADC_GAIN 0x1e
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#define SI1145_PARAM_ALSIR_ADC_MISC 0x1f
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#define SI1145_PARAM_ADC_OFFSET 0x1a
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/* Channel enable masks for CHLIST parameter */
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#define SI1145_CHLIST_EN_PS1 BIT(0)
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#define SI1145_CHLIST_EN_PS2 BIT(1)
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#define SI1145_CHLIST_EN_PS3 BIT(2)
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#define SI1145_CHLIST_EN_ALSVIS BIT(4)
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#define SI1145_CHLIST_EN_ALSIR BIT(5)
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#define SI1145_CHLIST_EN_AUX BIT(6)
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#define SI1145_CHLIST_EN_UV BIT(7)
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/* Proximity measurement mode for ADC_MISC parameter */
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#define SI1145_PS_ADC_MODE_NORMAL BIT(2)
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/* Signal range mask for ADC_MISC parameter */
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#define SI1145_ADC_MISC_RANGE BIT(5)
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/* Commands for REG_COMMAND */
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#define SI1145_CMD_NOP 0x00
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#define SI1145_CMD_RESET 0x01
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#define SI1145_CMD_PS_FORCE 0x05
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#define SI1145_CMD_ALS_FORCE 0x06
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#define SI1145_CMD_PSALS_FORCE 0x07
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#define SI1145_CMD_PS_PAUSE 0x09
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#define SI1145_CMD_ALS_PAUSE 0x0a
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#define SI1145_CMD_PSALS_PAUSE 0x0b
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#define SI1145_CMD_PS_AUTO 0x0d
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#define SI1145_CMD_ALS_AUTO 0x0e
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#define SI1145_CMD_PSALS_AUTO 0x0f
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#define SI1145_CMD_PARAM_QUERY 0x80
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#define SI1145_CMD_PARAM_SET 0xa0
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#define SI1145_RSP_INVALID_SETTING 0x80
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#define SI1145_RSP_COUNTER_MASK 0x0F
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/* Minimum sleep after each command to ensure it's received */
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#define SI1145_COMMAND_MINSLEEP_MS 5
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/* Return -ETIMEDOUT after this long */
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#define SI1145_COMMAND_TIMEOUT_MS 25
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/* Interrupt configuration masks for INT_CFG register */
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#define SI1145_INT_CFG_OE BIT(0) /* enable interrupt */
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#define SI1145_INT_CFG_MODE BIT(1) /* auto reset interrupt pin */
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/* Interrupt enable masks for IRQ_ENABLE register */
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#define SI1145_MASK_ALL_IE (BIT(4) | BIT(3) | BIT(2) | BIT(0))
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#define SI1145_MUX_TEMP 0x65
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#define SI1145_MUX_VDD 0x75
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/* Proximity LED current; see Table 2 in datasheet */
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#define SI1145_LED_CURRENT_45mA 0x04
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enum {
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SI1132,
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SI1141,
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SI1142,
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SI1143,
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SI1145,
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SI1146,
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SI1147,
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};
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struct si1145_part_info {
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u8 part;
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const struct iio_info *iio_info;
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const struct iio_chan_spec *channels;
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unsigned int num_channels;
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unsigned int num_leds;
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bool uncompressed_meas_rate;
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};
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/**
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* struct si1145_data - si1145 chip state data
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* @client: I2C client
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* @lock: mutex to protect shared state.
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* @cmdlock: Low-level mutex to protect command execution only
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* @rsp_seq: Next expected response number or -1 if counter reset required
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* @scan_mask: Saved scan mask to avoid duplicate set_chlist
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* @autonomous: If automatic measurements are active (for buffer support)
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* @part_info: Part information
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* @trig: Pointer to iio trigger
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* @meas_rate: Value of MEAS_RATE register. Only set in HW in auto mode
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* @buffer: Used to pack data read from sensor.
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*/
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struct si1145_data {
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struct i2c_client *client;
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struct mutex lock;
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struct mutex cmdlock;
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int rsp_seq;
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const struct si1145_part_info *part_info;
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unsigned long scan_mask;
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bool autonomous;
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struct iio_trigger *trig;
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int meas_rate;
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/*
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* Ensure timestamp will be naturally aligned if present.
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* Maximum buffer size (may be only partly used if not all
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* channels are enabled):
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* 6*2 bytes channels data + 4 bytes alignment +
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* 8 bytes timestamp
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*/
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u8 buffer[24] __aligned(8);
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};
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/*
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* __si1145_command_reset() - Send CMD_NOP and wait for response 0
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*
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* Does not modify data->rsp_seq
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*
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* Return: 0 on success and -errno on error.
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*/
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static int __si1145_command_reset(struct si1145_data *data)
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{
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struct device *dev = &data->client->dev;
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unsigned long stop_jiffies;
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int ret;
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ret = i2c_smbus_write_byte_data(data->client, SI1145_REG_COMMAND,
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SI1145_CMD_NOP);
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if (ret < 0)
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return ret;
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msleep(SI1145_COMMAND_MINSLEEP_MS);
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stop_jiffies = jiffies + SI1145_COMMAND_TIMEOUT_MS * HZ / 1000;
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while (true) {
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ret = i2c_smbus_read_byte_data(data->client,
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SI1145_REG_RESPONSE);
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if (ret <= 0)
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return ret;
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if (time_after(jiffies, stop_jiffies)) {
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dev_warn(dev, "timeout on reset\n");
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return -ETIMEDOUT;
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}
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msleep(SI1145_COMMAND_MINSLEEP_MS);
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}
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}
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/*
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* si1145_command() - Execute a command and poll the response register
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*
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* All conversion overflows are reported as -EOVERFLOW
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* INVALID_SETTING is reported as -EINVAL
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* Timeouts are reported as -ETIMEDOUT
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*
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* Return: 0 on success or -errno on failure
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*/
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static int si1145_command(struct si1145_data *data, u8 cmd)
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{
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struct device *dev = &data->client->dev;
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unsigned long stop_jiffies;
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int ret;
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mutex_lock(&data->cmdlock);
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if (data->rsp_seq < 0) {
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ret = __si1145_command_reset(data);
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if (ret < 0) {
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dev_err(dev, "failed to reset command counter, ret=%d\n",
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ret);
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goto out;
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}
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data->rsp_seq = 0;
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}
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ret = i2c_smbus_write_byte_data(data->client, SI1145_REG_COMMAND, cmd);
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if (ret) {
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dev_warn(dev, "failed to write command, ret=%d\n", ret);
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goto out;
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}
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/* Sleep a little to ensure the command is received */
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msleep(SI1145_COMMAND_MINSLEEP_MS);
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stop_jiffies = jiffies + SI1145_COMMAND_TIMEOUT_MS * HZ / 1000;
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while (true) {
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ret = i2c_smbus_read_byte_data(data->client,
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SI1145_REG_RESPONSE);
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if (ret < 0) {
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dev_warn(dev, "failed to read response, ret=%d\n", ret);
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break;
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}
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if ((ret & ~SI1145_RSP_COUNTER_MASK) == 0) {
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if (ret == data->rsp_seq) {
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if (time_after(jiffies, stop_jiffies)) {
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dev_warn(dev, "timeout on command 0x%02x\n",
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cmd);
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ret = -ETIMEDOUT;
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break;
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}
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msleep(SI1145_COMMAND_MINSLEEP_MS);
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continue;
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}
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if (ret == ((data->rsp_seq + 1) &
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SI1145_RSP_COUNTER_MASK)) {
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data->rsp_seq = ret;
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ret = 0;
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break;
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}
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dev_warn(dev, "unexpected response counter %d instead of %d\n",
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ret, (data->rsp_seq + 1) &
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SI1145_RSP_COUNTER_MASK);
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ret = -EIO;
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} else {
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if (ret == SI1145_RSP_INVALID_SETTING) {
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dev_warn(dev, "INVALID_SETTING error on command 0x%02x\n",
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cmd);
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ret = -EINVAL;
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} else {
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/* All overflows are treated identically */
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dev_dbg(dev, "overflow, ret=%d, cmd=0x%02x\n",
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ret, cmd);
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ret = -EOVERFLOW;
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}
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}
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/* Force a counter reset next time */
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data->rsp_seq = -1;
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break;
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}
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out:
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mutex_unlock(&data->cmdlock);
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return ret;
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}
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static int si1145_param_update(struct si1145_data *data, u8 op, u8 param,
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u8 value)
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{
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int ret;
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ret = i2c_smbus_write_byte_data(data->client,
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SI1145_REG_PARAM_WR, value);
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if (ret < 0)
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return ret;
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return si1145_command(data, op | (param & 0x1F));
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}
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static int si1145_param_set(struct si1145_data *data, u8 param, u8 value)
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{
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return si1145_param_update(data, SI1145_CMD_PARAM_SET, param, value);
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}
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/* Set param. Returns negative errno or current value */
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static int si1145_param_query(struct si1145_data *data, u8 param)
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{
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int ret;
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ret = si1145_command(data, SI1145_CMD_PARAM_QUERY | (param & 0x1F));
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if (ret < 0)
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return ret;
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return i2c_smbus_read_byte_data(data->client, SI1145_REG_PARAM_RD);
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}
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/* Expand 8 bit compressed value to 16 bit, see Silabs AN498 */
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static u16 si1145_uncompress(u8 x)
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{
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u16 result = 0;
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u8 exponent = 0;
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if (x < 8)
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return 0;
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exponent = (x & 0xf0) >> 4;
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result = 0x10 | (x & 0x0f);
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if (exponent >= 4)
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return result << (exponent - 4);
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return result >> (4 - exponent);
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}
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/* Compress 16 bit value to 8 bit, see Silabs AN498 */
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static u8 si1145_compress(u16 x)
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{
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u32 exponent = 0;
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u32 significand = 0;
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u32 tmp = x;
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if (x == 0x0000)
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return 0x00;
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if (x == 0x0001)
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return 0x08;
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while (1) {
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tmp >>= 1;
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exponent += 1;
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if (tmp == 1)
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break;
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}
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if (exponent < 5) {
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significand = x << (4 - exponent);
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return (exponent << 4) | (significand & 0xF);
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}
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significand = x >> (exponent - 5);
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if (significand & 1) {
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significand += 2;
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if (significand & 0x0040) {
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exponent += 1;
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significand >>= 1;
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}
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}
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return (exponent << 4) | ((significand >> 1) & 0xF);
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}
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/* Write meas_rate in hardware */
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static int si1145_set_meas_rate(struct si1145_data *data, int interval)
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{
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if (data->part_info->uncompressed_meas_rate)
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return i2c_smbus_write_word_data(data->client,
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SI1145_REG_MEAS_RATE, interval);
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else
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return i2c_smbus_write_byte_data(data->client,
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SI1145_REG_MEAS_RATE, interval);
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}
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static int si1145_read_samp_freq(struct si1145_data *data, int *val, int *val2)
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{
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*val = 32000;
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if (data->part_info->uncompressed_meas_rate)
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*val2 = data->meas_rate;
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else
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*val2 = si1145_uncompress(data->meas_rate);
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return IIO_VAL_FRACTIONAL;
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}
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/* Set the samp freq in driver private data */
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static int si1145_store_samp_freq(struct si1145_data *data, int val)
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{
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int ret = 0;
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int meas_rate;
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if (val <= 0 || val > 32000)
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return -ERANGE;
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meas_rate = 32000 / val;
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mutex_lock(&data->lock);
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if (data->autonomous) {
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ret = si1145_set_meas_rate(data, meas_rate);
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if (ret)
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goto out;
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}
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if (data->part_info->uncompressed_meas_rate)
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data->meas_rate = meas_rate;
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else
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data->meas_rate = si1145_compress(meas_rate);
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out:
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mutex_unlock(&data->lock);
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return ret;
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}
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static irqreturn_t si1145_trigger_handler(int irq, void *private)
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{
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struct iio_poll_func *pf = private;
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struct iio_dev *indio_dev = pf->indio_dev;
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struct si1145_data *data = iio_priv(indio_dev);
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int i, j = 0;
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int ret;
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u8 irq_status = 0;
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if (!data->autonomous) {
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ret = si1145_command(data, SI1145_CMD_PSALS_FORCE);
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if (ret < 0 && ret != -EOVERFLOW)
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goto done;
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} else {
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irq_status = ret = i2c_smbus_read_byte_data(data->client,
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SI1145_REG_IRQ_STATUS);
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if (ret < 0)
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goto done;
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if (!(irq_status & SI1145_MASK_ALL_IE))
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goto done;
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}
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for_each_set_bit(i, indio_dev->active_scan_mask,
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indio_dev->masklength) {
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int run = 1;
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while (i + run < indio_dev->masklength) {
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if (!test_bit(i + run, indio_dev->active_scan_mask))
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break;
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if (indio_dev->channels[i + run].address !=
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indio_dev->channels[i].address + 2 * run)
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break;
|
|
run++;
|
|
}
|
|
|
|
ret = i2c_smbus_read_i2c_block_data_or_emulated(
|
|
data->client, indio_dev->channels[i].address,
|
|
sizeof(u16) * run, &data->buffer[j]);
|
|
if (ret < 0)
|
|
goto done;
|
|
j += run * sizeof(u16);
|
|
i += run - 1;
|
|
}
|
|
|
|
if (data->autonomous) {
|
|
ret = i2c_smbus_write_byte_data(data->client,
|
|
SI1145_REG_IRQ_STATUS,
|
|
irq_status & SI1145_MASK_ALL_IE);
|
|
if (ret < 0)
|
|
goto done;
|
|
}
|
|
|
|
iio_push_to_buffers_with_timestamp(indio_dev, data->buffer,
|
|
iio_get_time_ns(indio_dev));
|
|
|
|
done:
|
|
iio_trigger_notify_done(indio_dev->trig);
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
static int si1145_set_chlist(struct iio_dev *indio_dev, unsigned long scan_mask)
|
|
{
|
|
struct si1145_data *data = iio_priv(indio_dev);
|
|
u8 reg = 0, mux;
|
|
int ret;
|
|
int i;
|
|
|
|
/* channel list already set, no need to reprogram */
|
|
if (data->scan_mask == scan_mask)
|
|
return 0;
|
|
|
|
for_each_set_bit(i, &scan_mask, indio_dev->masklength) {
|
|
switch (indio_dev->channels[i].address) {
|
|
case SI1145_REG_ALSVIS_DATA:
|
|
reg |= SI1145_CHLIST_EN_ALSVIS;
|
|
break;
|
|
case SI1145_REG_ALSIR_DATA:
|
|
reg |= SI1145_CHLIST_EN_ALSIR;
|
|
break;
|
|
case SI1145_REG_PS1_DATA:
|
|
reg |= SI1145_CHLIST_EN_PS1;
|
|
break;
|
|
case SI1145_REG_PS2_DATA:
|
|
reg |= SI1145_CHLIST_EN_PS2;
|
|
break;
|
|
case SI1145_REG_PS3_DATA:
|
|
reg |= SI1145_CHLIST_EN_PS3;
|
|
break;
|
|
case SI1145_REG_AUX_DATA:
|
|
switch (indio_dev->channels[i].type) {
|
|
case IIO_UVINDEX:
|
|
reg |= SI1145_CHLIST_EN_UV;
|
|
break;
|
|
default:
|
|
reg |= SI1145_CHLIST_EN_AUX;
|
|
if (indio_dev->channels[i].type == IIO_TEMP)
|
|
mux = SI1145_MUX_TEMP;
|
|
else
|
|
mux = SI1145_MUX_VDD;
|
|
ret = si1145_param_set(data,
|
|
SI1145_PARAM_AUX_ADC_MUX, mux);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
data->scan_mask = scan_mask;
|
|
ret = si1145_param_set(data, SI1145_PARAM_CHLIST, reg);
|
|
|
|
return ret < 0 ? ret : 0;
|
|
}
|
|
|
|
static int si1145_measure(struct iio_dev *indio_dev,
|
|
struct iio_chan_spec const *chan)
|
|
{
|
|
struct si1145_data *data = iio_priv(indio_dev);
|
|
u8 cmd;
|
|
int ret;
|
|
|
|
ret = si1145_set_chlist(indio_dev, BIT(chan->scan_index));
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
cmd = (chan->type == IIO_PROXIMITY) ? SI1145_CMD_PS_FORCE :
|
|
SI1145_CMD_ALS_FORCE;
|
|
ret = si1145_command(data, cmd);
|
|
if (ret < 0 && ret != -EOVERFLOW)
|
|
return ret;
|
|
|
|
return i2c_smbus_read_word_data(data->client, chan->address);
|
|
}
|
|
|
|
/*
|
|
* 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[] = {
|
|
128, 64, 32, 16, 8, 4};
|
|
static const int si1145_intensity_scale_available[] = {
|
|
128, 64, 32, 16, 8, 4, 2, 1};
|
|
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)
|
|
{
|
|
return 128 >> regval;
|
|
}
|
|
|
|
static int si1145_proximity_adcgain_from_scale(int val, int val2)
|
|
{
|
|
val = find_closest_descending(val, si1145_proximity_scale_available,
|
|
ARRAY_SIZE(si1145_proximity_scale_available));
|
|
if (val < 0 || val > 5 || val2 != 0)
|
|
return -EINVAL;
|
|
|
|
return val;
|
|
}
|
|
|
|
static int si1145_intensity_adcgain_from_scale(int val, int val2)
|
|
{
|
|
val = find_closest_descending(val, si1145_intensity_scale_available,
|
|
ARRAY_SIZE(si1145_intensity_scale_available));
|
|
if (val < 0 || val > 7 || val2 != 0)
|
|
return -EINVAL;
|
|
|
|
return val;
|
|
}
|
|
|
|
static int si1145_read_raw(struct iio_dev *indio_dev,
|
|
struct iio_chan_spec const *chan,
|
|
int *val, int *val2, long mask)
|
|
{
|
|
struct si1145_data *data = iio_priv(indio_dev);
|
|
int ret;
|
|
u8 reg;
|
|
|
|
switch (mask) {
|
|
case IIO_CHAN_INFO_RAW:
|
|
switch (chan->type) {
|
|
case IIO_INTENSITY:
|
|
case IIO_PROXIMITY:
|
|
case IIO_VOLTAGE:
|
|
case IIO_TEMP:
|
|
case IIO_UVINDEX:
|
|
ret = iio_device_claim_direct_mode(indio_dev);
|
|
if (ret)
|
|
return ret;
|
|
ret = si1145_measure(indio_dev, chan);
|
|
iio_device_release_direct_mode(indio_dev);
|
|
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
*val = ret;
|
|
|
|
return IIO_VAL_INT;
|
|
case IIO_CURRENT:
|
|
ret = i2c_smbus_read_byte_data(data->client,
|
|
SI1145_PS_LED_REG(chan->channel));
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
*val = (ret >> SI1145_PS_LED_SHIFT(chan->channel))
|
|
& 0x0f;
|
|
|
|
return IIO_VAL_INT;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
case IIO_CHAN_INFO_SCALE:
|
|
switch (chan->type) {
|
|
case IIO_PROXIMITY:
|
|
reg = SI1145_PARAM_PS_ADC_GAIN;
|
|
break;
|
|
case IIO_INTENSITY:
|
|
if (chan->channel2 == IIO_MOD_LIGHT_IR)
|
|
reg = SI1145_PARAM_ALSIR_ADC_GAIN;
|
|
else
|
|
reg = SI1145_PARAM_ALSVIS_ADC_GAIN;
|
|
break;
|
|
case IIO_TEMP:
|
|
*val = 28;
|
|
*val2 = 571429;
|
|
return IIO_VAL_INT_PLUS_MICRO;
|
|
case IIO_UVINDEX:
|
|
*val = 0;
|
|
*val2 = 10000;
|
|
return IIO_VAL_INT_PLUS_MICRO;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
|
|
ret = si1145_param_query(data, reg);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
*val = si1145_scale_from_adcgain(ret & 0x07);
|
|
|
|
return IIO_VAL_INT;
|
|
case IIO_CHAN_INFO_OFFSET:
|
|
switch (chan->type) {
|
|
case IIO_TEMP:
|
|
/*
|
|
* -ADC offset - ADC counts @ 25°C -
|
|
* 35 * ADC counts / °C
|
|
*/
|
|
*val = -256 - 11136 + 25 * 35;
|
|
return IIO_VAL_INT;
|
|
default:
|
|
/*
|
|
* All ADC measurements have are by default offset
|
|
* by -256
|
|
* See AN498 5.6.3
|
|
*/
|
|
ret = si1145_param_query(data, SI1145_PARAM_ADC_OFFSET);
|
|
if (ret < 0)
|
|
return ret;
|
|
*val = -si1145_uncompress(ret);
|
|
return IIO_VAL_INT;
|
|
}
|
|
case IIO_CHAN_INFO_SAMP_FREQ:
|
|
return si1145_read_samp_freq(data, val, val2);
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
|
|
static int si1145_write_raw(struct iio_dev *indio_dev,
|
|
struct iio_chan_spec const *chan,
|
|
int val, int val2, long mask)
|
|
{
|
|
struct si1145_data *data = iio_priv(indio_dev);
|
|
u8 reg1, reg2, shift;
|
|
int ret;
|
|
|
|
switch (mask) {
|
|
case IIO_CHAN_INFO_SCALE:
|
|
switch (chan->type) {
|
|
case IIO_PROXIMITY:
|
|
val = si1145_proximity_adcgain_from_scale(val, val2);
|
|
if (val < 0)
|
|
return val;
|
|
reg1 = SI1145_PARAM_PS_ADC_GAIN;
|
|
reg2 = SI1145_PARAM_PS_ADC_COUNTER;
|
|
break;
|
|
case IIO_INTENSITY:
|
|
val = si1145_intensity_adcgain_from_scale(val, val2);
|
|
if (val < 0)
|
|
return val;
|
|
if (chan->channel2 == IIO_MOD_LIGHT_IR) {
|
|
reg1 = SI1145_PARAM_ALSIR_ADC_GAIN;
|
|
reg2 = SI1145_PARAM_ALSIR_ADC_COUNTER;
|
|
} else {
|
|
reg1 = SI1145_PARAM_ALSVIS_ADC_GAIN;
|
|
reg2 = SI1145_PARAM_ALSVIS_ADC_COUNTER;
|
|
}
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
|
|
ret = iio_device_claim_direct_mode(indio_dev);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ret = si1145_param_set(data, reg1, val);
|
|
if (ret < 0) {
|
|
iio_device_release_direct_mode(indio_dev);
|
|
return ret;
|
|
}
|
|
/* Set recovery period to one's complement of gain */
|
|
ret = si1145_param_set(data, reg2, (~val & 0x07) << 4);
|
|
iio_device_release_direct_mode(indio_dev);
|
|
return ret;
|
|
case IIO_CHAN_INFO_RAW:
|
|
if (chan->type != IIO_CURRENT)
|
|
return -EINVAL;
|
|
|
|
if (val < 0 || val > 15 || val2 != 0)
|
|
return -EINVAL;
|
|
|
|
reg1 = SI1145_PS_LED_REG(chan->channel);
|
|
shift = SI1145_PS_LED_SHIFT(chan->channel);
|
|
|
|
ret = iio_device_claim_direct_mode(indio_dev);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ret = i2c_smbus_read_byte_data(data->client, reg1);
|
|
if (ret < 0) {
|
|
iio_device_release_direct_mode(indio_dev);
|
|
return ret;
|
|
}
|
|
ret = i2c_smbus_write_byte_data(data->client, reg1,
|
|
(ret & ~(0x0f << shift)) |
|
|
((val & 0x0f) << shift));
|
|
iio_device_release_direct_mode(indio_dev);
|
|
return ret;
|
|
case IIO_CHAN_INFO_SAMP_FREQ:
|
|
return si1145_store_samp_freq(data, val);
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
|
|
#define SI1145_ST { \
|
|
.sign = 'u', \
|
|
.realbits = 16, \
|
|
.storagebits = 16, \
|
|
.endianness = IIO_LE, \
|
|
}
|
|
|
|
#define SI1145_INTENSITY_CHANNEL(_si) { \
|
|
.type = IIO_INTENSITY, \
|
|
.info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | \
|
|
BIT(IIO_CHAN_INFO_OFFSET) | \
|
|
BIT(IIO_CHAN_INFO_SCALE), \
|
|
.info_mask_shared_by_all = BIT(IIO_CHAN_INFO_SAMP_FREQ), \
|
|
.scan_type = SI1145_ST, \
|
|
.scan_index = _si, \
|
|
.address = SI1145_REG_ALSVIS_DATA, \
|
|
}
|
|
|
|
#define SI1145_INTENSITY_IR_CHANNEL(_si) { \
|
|
.type = IIO_INTENSITY, \
|
|
.info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | \
|
|
BIT(IIO_CHAN_INFO_OFFSET) | \
|
|
BIT(IIO_CHAN_INFO_SCALE), \
|
|
.info_mask_shared_by_all = BIT(IIO_CHAN_INFO_SAMP_FREQ), \
|
|
.modified = 1, \
|
|
.channel2 = IIO_MOD_LIGHT_IR, \
|
|
.scan_type = SI1145_ST, \
|
|
.scan_index = _si, \
|
|
.address = SI1145_REG_ALSIR_DATA, \
|
|
}
|
|
|
|
#define SI1145_TEMP_CHANNEL(_si) { \
|
|
.type = IIO_TEMP, \
|
|
.info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | \
|
|
BIT(IIO_CHAN_INFO_OFFSET) | \
|
|
BIT(IIO_CHAN_INFO_SCALE), \
|
|
.info_mask_shared_by_all = BIT(IIO_CHAN_INFO_SAMP_FREQ), \
|
|
.scan_type = SI1145_ST, \
|
|
.scan_index = _si, \
|
|
.address = SI1145_REG_AUX_DATA, \
|
|
}
|
|
|
|
#define SI1145_UV_CHANNEL(_si) { \
|
|
.type = IIO_UVINDEX, \
|
|
.info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | \
|
|
BIT(IIO_CHAN_INFO_SCALE), \
|
|
.info_mask_shared_by_all = BIT(IIO_CHAN_INFO_SAMP_FREQ), \
|
|
.scan_type = SI1145_ST, \
|
|
.scan_index = _si, \
|
|
.address = SI1145_REG_AUX_DATA, \
|
|
}
|
|
|
|
#define SI1145_PROXIMITY_CHANNEL(_si, _ch) { \
|
|
.type = IIO_PROXIMITY, \
|
|
.indexed = 1, \
|
|
.channel = _ch, \
|
|
.info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \
|
|
.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE) | \
|
|
BIT(IIO_CHAN_INFO_OFFSET), \
|
|
.info_mask_shared_by_all = BIT(IIO_CHAN_INFO_SAMP_FREQ), \
|
|
.scan_type = SI1145_ST, \
|
|
.scan_index = _si, \
|
|
.address = SI1145_REG_PS1_DATA + _ch * 2, \
|
|
}
|
|
|
|
#define SI1145_VOLTAGE_CHANNEL(_si) { \
|
|
.type = IIO_VOLTAGE, \
|
|
.info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \
|
|
.info_mask_shared_by_all = BIT(IIO_CHAN_INFO_SAMP_FREQ), \
|
|
.scan_type = SI1145_ST, \
|
|
.scan_index = _si, \
|
|
.address = SI1145_REG_AUX_DATA, \
|
|
}
|
|
|
|
#define SI1145_CURRENT_CHANNEL(_ch) { \
|
|
.type = IIO_CURRENT, \
|
|
.indexed = 1, \
|
|
.channel = _ch, \
|
|
.output = 1, \
|
|
.scan_index = -1, \
|
|
.info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \
|
|
}
|
|
|
|
static const struct iio_chan_spec si1132_channels[] = {
|
|
SI1145_INTENSITY_CHANNEL(0),
|
|
SI1145_INTENSITY_IR_CHANNEL(1),
|
|
SI1145_TEMP_CHANNEL(2),
|
|
SI1145_VOLTAGE_CHANNEL(3),
|
|
SI1145_UV_CHANNEL(4),
|
|
IIO_CHAN_SOFT_TIMESTAMP(6),
|
|
};
|
|
|
|
static const struct iio_chan_spec si1141_channels[] = {
|
|
SI1145_INTENSITY_CHANNEL(0),
|
|
SI1145_INTENSITY_IR_CHANNEL(1),
|
|
SI1145_PROXIMITY_CHANNEL(2, 0),
|
|
SI1145_TEMP_CHANNEL(3),
|
|
SI1145_VOLTAGE_CHANNEL(4),
|
|
IIO_CHAN_SOFT_TIMESTAMP(5),
|
|
SI1145_CURRENT_CHANNEL(0),
|
|
};
|
|
|
|
static const struct iio_chan_spec si1142_channels[] = {
|
|
SI1145_INTENSITY_CHANNEL(0),
|
|
SI1145_INTENSITY_IR_CHANNEL(1),
|
|
SI1145_PROXIMITY_CHANNEL(2, 0),
|
|
SI1145_PROXIMITY_CHANNEL(3, 1),
|
|
SI1145_TEMP_CHANNEL(4),
|
|
SI1145_VOLTAGE_CHANNEL(5),
|
|
IIO_CHAN_SOFT_TIMESTAMP(6),
|
|
SI1145_CURRENT_CHANNEL(0),
|
|
SI1145_CURRENT_CHANNEL(1),
|
|
};
|
|
|
|
static const struct iio_chan_spec si1143_channels[] = {
|
|
SI1145_INTENSITY_CHANNEL(0),
|
|
SI1145_INTENSITY_IR_CHANNEL(1),
|
|
SI1145_PROXIMITY_CHANNEL(2, 0),
|
|
SI1145_PROXIMITY_CHANNEL(3, 1),
|
|
SI1145_PROXIMITY_CHANNEL(4, 2),
|
|
SI1145_TEMP_CHANNEL(5),
|
|
SI1145_VOLTAGE_CHANNEL(6),
|
|
IIO_CHAN_SOFT_TIMESTAMP(7),
|
|
SI1145_CURRENT_CHANNEL(0),
|
|
SI1145_CURRENT_CHANNEL(1),
|
|
SI1145_CURRENT_CHANNEL(2),
|
|
};
|
|
|
|
static const struct iio_chan_spec si1145_channels[] = {
|
|
SI1145_INTENSITY_CHANNEL(0),
|
|
SI1145_INTENSITY_IR_CHANNEL(1),
|
|
SI1145_PROXIMITY_CHANNEL(2, 0),
|
|
SI1145_TEMP_CHANNEL(3),
|
|
SI1145_VOLTAGE_CHANNEL(4),
|
|
SI1145_UV_CHANNEL(5),
|
|
IIO_CHAN_SOFT_TIMESTAMP(6),
|
|
SI1145_CURRENT_CHANNEL(0),
|
|
};
|
|
|
|
static const struct iio_chan_spec si1146_channels[] = {
|
|
SI1145_INTENSITY_CHANNEL(0),
|
|
SI1145_INTENSITY_IR_CHANNEL(1),
|
|
SI1145_TEMP_CHANNEL(2),
|
|
SI1145_VOLTAGE_CHANNEL(3),
|
|
SI1145_UV_CHANNEL(4),
|
|
SI1145_PROXIMITY_CHANNEL(5, 0),
|
|
SI1145_PROXIMITY_CHANNEL(6, 1),
|
|
IIO_CHAN_SOFT_TIMESTAMP(7),
|
|
SI1145_CURRENT_CHANNEL(0),
|
|
SI1145_CURRENT_CHANNEL(1),
|
|
};
|
|
|
|
static const struct iio_chan_spec si1147_channels[] = {
|
|
SI1145_INTENSITY_CHANNEL(0),
|
|
SI1145_INTENSITY_IR_CHANNEL(1),
|
|
SI1145_PROXIMITY_CHANNEL(2, 0),
|
|
SI1145_PROXIMITY_CHANNEL(3, 1),
|
|
SI1145_PROXIMITY_CHANNEL(4, 2),
|
|
SI1145_TEMP_CHANNEL(5),
|
|
SI1145_VOLTAGE_CHANNEL(6),
|
|
SI1145_UV_CHANNEL(7),
|
|
IIO_CHAN_SOFT_TIMESTAMP(8),
|
|
SI1145_CURRENT_CHANNEL(0),
|
|
SI1145_CURRENT_CHANNEL(1),
|
|
SI1145_CURRENT_CHANNEL(2),
|
|
};
|
|
|
|
static struct attribute *si1132_attributes[] = {
|
|
&iio_const_attr_in_intensity_scale_available.dev_attr.attr,
|
|
&iio_const_attr_in_intensity_ir_scale_available.dev_attr.attr,
|
|
NULL,
|
|
};
|
|
|
|
static struct attribute *si114x_attributes[] = {
|
|
&iio_const_attr_in_intensity_scale_available.dev_attr.attr,
|
|
&iio_const_attr_in_intensity_ir_scale_available.dev_attr.attr,
|
|
&iio_const_attr_in_proximity_scale_available.dev_attr.attr,
|
|
NULL,
|
|
};
|
|
|
|
static const struct attribute_group si1132_attribute_group = {
|
|
.attrs = si1132_attributes,
|
|
};
|
|
|
|
static const struct attribute_group si114x_attribute_group = {
|
|
.attrs = si114x_attributes,
|
|
};
|
|
|
|
|
|
static const struct iio_info si1132_info = {
|
|
.read_raw = si1145_read_raw,
|
|
.write_raw = si1145_write_raw,
|
|
.attrs = &si1132_attribute_group,
|
|
};
|
|
|
|
static const struct iio_info si114x_info = {
|
|
.read_raw = si1145_read_raw,
|
|
.write_raw = si1145_write_raw,
|
|
.attrs = &si114x_attribute_group,
|
|
};
|
|
|
|
#define SI1145_PART(id, iio_info, chans, leds, uncompressed_meas_rate) \
|
|
{id, iio_info, chans, ARRAY_SIZE(chans), leds, uncompressed_meas_rate}
|
|
|
|
static const struct si1145_part_info si1145_part_info[] = {
|
|
[SI1132] = SI1145_PART(0x32, &si1132_info, si1132_channels, 0, true),
|
|
[SI1141] = SI1145_PART(0x41, &si114x_info, si1141_channels, 1, false),
|
|
[SI1142] = SI1145_PART(0x42, &si114x_info, si1142_channels, 2, false),
|
|
[SI1143] = SI1145_PART(0x43, &si114x_info, si1143_channels, 3, false),
|
|
[SI1145] = SI1145_PART(0x45, &si114x_info, si1145_channels, 1, true),
|
|
[SI1146] = SI1145_PART(0x46, &si114x_info, si1146_channels, 2, true),
|
|
[SI1147] = SI1145_PART(0x47, &si114x_info, si1147_channels, 3, true),
|
|
};
|
|
|
|
static int si1145_initialize(struct si1145_data *data)
|
|
{
|
|
struct i2c_client *client = data->client;
|
|
int ret;
|
|
|
|
ret = i2c_smbus_write_byte_data(client, SI1145_REG_COMMAND,
|
|
SI1145_CMD_RESET);
|
|
if (ret < 0)
|
|
return ret;
|
|
msleep(SI1145_COMMAND_TIMEOUT_MS);
|
|
|
|
/* Hardware key, magic value */
|
|
ret = i2c_smbus_write_byte_data(client, SI1145_REG_HW_KEY, 0x17);
|
|
if (ret < 0)
|
|
return ret;
|
|
msleep(SI1145_COMMAND_TIMEOUT_MS);
|
|
|
|
/* Turn off autonomous mode */
|
|
ret = si1145_set_meas_rate(data, 0);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
/* Initialize sampling freq to 10 Hz */
|
|
ret = si1145_store_samp_freq(data, 10);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
/* Set LED currents to 45 mA; have 4 bits, see Table 2 in datasheet */
|
|
switch (data->part_info->num_leds) {
|
|
case 3:
|
|
ret = i2c_smbus_write_byte_data(client,
|
|
SI1145_REG_PS_LED3,
|
|
SI1145_LED_CURRENT_45mA);
|
|
if (ret < 0)
|
|
return ret;
|
|
fallthrough;
|
|
case 2:
|
|
ret = i2c_smbus_write_byte_data(client,
|
|
SI1145_REG_PS_LED21,
|
|
(SI1145_LED_CURRENT_45mA << 4) |
|
|
SI1145_LED_CURRENT_45mA);
|
|
break;
|
|
case 1:
|
|
ret = i2c_smbus_write_byte_data(client,
|
|
SI1145_REG_PS_LED21,
|
|
SI1145_LED_CURRENT_45mA);
|
|
break;
|
|
default:
|
|
ret = 0;
|
|
break;
|
|
}
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
/* Set normal proximity measurement mode */
|
|
ret = si1145_param_set(data, SI1145_PARAM_PS_ADC_MISC,
|
|
SI1145_PS_ADC_MODE_NORMAL);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
ret = si1145_param_set(data, SI1145_PARAM_PS_ADC_GAIN, 0x01);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
/* ADC_COUNTER should be one complement of ADC_GAIN */
|
|
ret = si1145_param_set(data, SI1145_PARAM_PS_ADC_COUNTER, 0x06 << 4);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
/* Set ALS visible measurement mode */
|
|
ret = si1145_param_set(data, SI1145_PARAM_ALSVIS_ADC_MISC,
|
|
SI1145_ADC_MISC_RANGE);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
ret = si1145_param_set(data, SI1145_PARAM_ALSVIS_ADC_GAIN, 0x03);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
ret = si1145_param_set(data, SI1145_PARAM_ALSVIS_ADC_COUNTER,
|
|
0x04 << 4);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
/* Set ALS IR measurement mode */
|
|
ret = si1145_param_set(data, SI1145_PARAM_ALSIR_ADC_MISC,
|
|
SI1145_ADC_MISC_RANGE);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
ret = si1145_param_set(data, SI1145_PARAM_ALSIR_ADC_GAIN, 0x01);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
ret = si1145_param_set(data, SI1145_PARAM_ALSIR_ADC_COUNTER,
|
|
0x06 << 4);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
/*
|
|
* Initialize UCOEF to default values in datasheet
|
|
* These registers are normally zero on reset
|
|
*/
|
|
if (data->part_info == &si1145_part_info[SI1132] ||
|
|
data->part_info == &si1145_part_info[SI1145] ||
|
|
data->part_info == &si1145_part_info[SI1146] ||
|
|
data->part_info == &si1145_part_info[SI1147]) {
|
|
ret = i2c_smbus_write_byte_data(data->client,
|
|
SI1145_REG_UCOEF1,
|
|
SI1145_UCOEF1_DEFAULT);
|
|
if (ret < 0)
|
|
return ret;
|
|
ret = i2c_smbus_write_byte_data(data->client,
|
|
SI1145_REG_UCOEF2, SI1145_UCOEF2_DEFAULT);
|
|
if (ret < 0)
|
|
return ret;
|
|
ret = i2c_smbus_write_byte_data(data->client,
|
|
SI1145_REG_UCOEF3, SI1145_UCOEF3_DEFAULT);
|
|
if (ret < 0)
|
|
return ret;
|
|
ret = i2c_smbus_write_byte_data(data->client,
|
|
SI1145_REG_UCOEF4, SI1145_UCOEF4_DEFAULT);
|
|
if (ret < 0)
|
|
return ret;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* 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)
|
|
{
|
|
struct si1145_data *data = iio_priv(indio_dev);
|
|
int ret;
|
|
|
|
mutex_lock(&data->lock);
|
|
ret = si1145_set_chlist(indio_dev, *indio_dev->active_scan_mask);
|
|
mutex_unlock(&data->lock);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static bool si1145_validate_scan_mask(struct iio_dev *indio_dev,
|
|
const unsigned long *scan_mask)
|
|
{
|
|
struct si1145_data *data = iio_priv(indio_dev);
|
|
unsigned int count = 0;
|
|
int i;
|
|
|
|
/* Check that at most one AUX channel is enabled */
|
|
for_each_set_bit(i, scan_mask, data->part_info->num_channels) {
|
|
if (indio_dev->channels[i].address == SI1145_REG_AUX_DATA)
|
|
count++;
|
|
}
|
|
|
|
return count <= 1;
|
|
}
|
|
|
|
static const struct iio_buffer_setup_ops si1145_buffer_setup_ops = {
|
|
.preenable = si1145_buffer_preenable,
|
|
.validate_scan_mask = si1145_validate_scan_mask,
|
|
};
|
|
|
|
/*
|
|
* 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)
|
|
{
|
|
struct iio_dev *indio_dev = iio_trigger_get_drvdata(trig);
|
|
struct si1145_data *data = iio_priv(indio_dev);
|
|
int err = 0, ret;
|
|
|
|
mutex_lock(&data->lock);
|
|
|
|
if (state) {
|
|
data->autonomous = true;
|
|
err = i2c_smbus_write_byte_data(data->client,
|
|
SI1145_REG_INT_CFG, SI1145_INT_CFG_OE);
|
|
if (err < 0)
|
|
goto disable;
|
|
err = i2c_smbus_write_byte_data(data->client,
|
|
SI1145_REG_IRQ_ENABLE, SI1145_MASK_ALL_IE);
|
|
if (err < 0)
|
|
goto disable;
|
|
err = si1145_set_meas_rate(data, data->meas_rate);
|
|
if (err < 0)
|
|
goto disable;
|
|
err = si1145_command(data, SI1145_CMD_PSALS_AUTO);
|
|
if (err < 0)
|
|
goto disable;
|
|
} else {
|
|
disable:
|
|
/* Disable as much as possible skipping errors */
|
|
ret = si1145_command(data, SI1145_CMD_PSALS_PAUSE);
|
|
if (ret < 0 && !err)
|
|
err = ret;
|
|
ret = si1145_set_meas_rate(data, 0);
|
|
if (ret < 0 && !err)
|
|
err = ret;
|
|
ret = i2c_smbus_write_byte_data(data->client,
|
|
SI1145_REG_IRQ_ENABLE, 0);
|
|
if (ret < 0 && !err)
|
|
err = ret;
|
|
ret = i2c_smbus_write_byte_data(data->client,
|
|
SI1145_REG_INT_CFG, 0);
|
|
if (ret < 0 && !err)
|
|
err = ret;
|
|
data->autonomous = false;
|
|
}
|
|
|
|
mutex_unlock(&data->lock);
|
|
return err;
|
|
}
|
|
|
|
static const struct iio_trigger_ops si1145_trigger_ops = {
|
|
.set_trigger_state = si1145_trigger_set_state,
|
|
};
|
|
|
|
static int si1145_probe_trigger(struct iio_dev *indio_dev)
|
|
{
|
|
struct si1145_data *data = iio_priv(indio_dev);
|
|
struct i2c_client *client = data->client;
|
|
struct iio_trigger *trig;
|
|
int ret;
|
|
|
|
trig = devm_iio_trigger_alloc(&client->dev,
|
|
"%s-dev%d", indio_dev->name, iio_device_id(indio_dev));
|
|
if (!trig)
|
|
return -ENOMEM;
|
|
|
|
trig->ops = &si1145_trigger_ops;
|
|
iio_trigger_set_drvdata(trig, indio_dev);
|
|
|
|
ret = devm_request_irq(&client->dev, client->irq,
|
|
iio_trigger_generic_data_rdy_poll,
|
|
IRQF_TRIGGER_FALLING,
|
|
"si1145_irq",
|
|
trig);
|
|
if (ret < 0) {
|
|
dev_err(&client->dev, "irq request failed\n");
|
|
return ret;
|
|
}
|
|
|
|
ret = devm_iio_trigger_register(&client->dev, trig);
|
|
if (ret)
|
|
return ret;
|
|
|
|
data->trig = trig;
|
|
indio_dev->trig = iio_trigger_get(data->trig);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int si1145_probe(struct i2c_client *client,
|
|
const struct i2c_device_id *id)
|
|
{
|
|
struct si1145_data *data;
|
|
struct iio_dev *indio_dev;
|
|
u8 part_id, rev_id, seq_id;
|
|
int ret;
|
|
|
|
indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
|
|
if (!indio_dev)
|
|
return -ENOMEM;
|
|
|
|
data = iio_priv(indio_dev);
|
|
i2c_set_clientdata(client, indio_dev);
|
|
data->client = client;
|
|
data->part_info = &si1145_part_info[id->driver_data];
|
|
|
|
part_id = ret = i2c_smbus_read_byte_data(data->client,
|
|
SI1145_REG_PART_ID);
|
|
if (ret < 0)
|
|
return ret;
|
|
rev_id = ret = i2c_smbus_read_byte_data(data->client,
|
|
SI1145_REG_REV_ID);
|
|
if (ret < 0)
|
|
return ret;
|
|
seq_id = ret = i2c_smbus_read_byte_data(data->client,
|
|
SI1145_REG_SEQ_ID);
|
|
if (ret < 0)
|
|
return ret;
|
|
dev_info(&client->dev, "device ID part 0x%02x rev 0x%02x seq 0x%02x\n",
|
|
part_id, rev_id, seq_id);
|
|
if (part_id != data->part_info->part) {
|
|
dev_err(&client->dev, "part ID mismatch got 0x%02x, expected 0x%02x\n",
|
|
part_id, data->part_info->part);
|
|
return -ENODEV;
|
|
}
|
|
|
|
indio_dev->name = id->name;
|
|
indio_dev->channels = data->part_info->channels;
|
|
indio_dev->num_channels = data->part_info->num_channels;
|
|
indio_dev->info = data->part_info->iio_info;
|
|
indio_dev->modes = INDIO_DIRECT_MODE;
|
|
|
|
mutex_init(&data->lock);
|
|
mutex_init(&data->cmdlock);
|
|
|
|
ret = si1145_initialize(data);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
ret = devm_iio_triggered_buffer_setup(&client->dev,
|
|
indio_dev, NULL,
|
|
si1145_trigger_handler, &si1145_buffer_setup_ops);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
if (client->irq) {
|
|
ret = si1145_probe_trigger(indio_dev);
|
|
if (ret < 0)
|
|
return ret;
|
|
} else {
|
|
dev_info(&client->dev, "no irq, using polling\n");
|
|
}
|
|
|
|
return devm_iio_device_register(&client->dev, indio_dev);
|
|
}
|
|
|
|
static const struct i2c_device_id si1145_ids[] = {
|
|
{ "si1132", SI1132 },
|
|
{ "si1141", SI1141 },
|
|
{ "si1142", SI1142 },
|
|
{ "si1143", SI1143 },
|
|
{ "si1145", SI1145 },
|
|
{ "si1146", SI1146 },
|
|
{ "si1147", SI1147 },
|
|
{ }
|
|
};
|
|
MODULE_DEVICE_TABLE(i2c, si1145_ids);
|
|
|
|
static struct i2c_driver si1145_driver = {
|
|
.driver = {
|
|
.name = "si1145",
|
|
},
|
|
.probe = si1145_probe,
|
|
.id_table = si1145_ids,
|
|
};
|
|
|
|
module_i2c_driver(si1145_driver);
|
|
|
|
MODULE_AUTHOR("Peter Meerwald-Stadler <pmeerw@pmeerw.net>");
|
|
MODULE_DESCRIPTION("Silabs SI1132 and SI1141/2/3/5/6/7 proximity, ambient light and UV index sensor driver");
|
|
MODULE_LICENSE("GPL");
|