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![Gwendal Grignou](/assets/img/avatar_default.png)
Use cocci semantic patch: @@ expression trigger, P; @@ trigger = devm_iio_trigger_alloc(P, ...); ... - trigger->dev.parent = P; To remove trigger->dev.parent, since it is set by default. Signed-off-by: Gwendal Grignou <gwendal@chromium.org> Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com> Link: https://lore.kernel.org/r/20210309193620.2176163-3-gwendal@chromium.org Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
1167 lines
28 KiB
C
1167 lines
28 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* vcnl4000.c - Support for Vishay VCNL4000/4010/4020/4040/4200 combined ambient
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* light and proximity sensor
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*
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* Copyright 2012 Peter Meerwald <pmeerw@pmeerw.net>
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* Copyright 2019 Pursim SPC
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* Copyright 2020 Mathieu Othacehe <m.othacehe@gmail.com>
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*
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* IIO driver for:
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* VCNL4000/10/20 (7-bit I2C slave address 0x13)
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* VCNL4040 (7-bit I2C slave address 0x60)
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* VCNL4200 (7-bit I2C slave address 0x51)
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*
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* TODO:
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* allow to adjust IR current
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* interrupts (VCNL4040, VCNL4200)
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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/delay.h>
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#include <linux/pm_runtime.h>
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#include <linux/interrupt.h>
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#include <linux/iio/buffer.h>
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#include <linux/iio/events.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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#define VCNL4000_DRV_NAME "vcnl4000"
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#define VCNL4000_PROD_ID 0x01
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#define VCNL4010_PROD_ID 0x02 /* for VCNL4020, VCNL4010 */
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#define VCNL4040_PROD_ID 0x86
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#define VCNL4200_PROD_ID 0x58
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#define VCNL4000_COMMAND 0x80 /* Command register */
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#define VCNL4000_PROD_REV 0x81 /* Product ID and Revision ID */
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#define VCNL4010_PROX_RATE 0x82 /* Proximity rate */
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#define VCNL4000_LED_CURRENT 0x83 /* IR LED current for proximity mode */
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#define VCNL4000_AL_PARAM 0x84 /* Ambient light parameter register */
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#define VCNL4010_ALS_PARAM 0x84 /* ALS rate */
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#define VCNL4000_AL_RESULT_HI 0x85 /* Ambient light result register, MSB */
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#define VCNL4000_AL_RESULT_LO 0x86 /* Ambient light result register, LSB */
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#define VCNL4000_PS_RESULT_HI 0x87 /* Proximity result register, MSB */
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#define VCNL4000_PS_RESULT_LO 0x88 /* Proximity result register, LSB */
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#define VCNL4000_PS_MEAS_FREQ 0x89 /* Proximity test signal frequency */
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#define VCNL4010_INT_CTRL 0x89 /* Interrupt control */
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#define VCNL4000_PS_MOD_ADJ 0x8a /* Proximity modulator timing adjustment */
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#define VCNL4010_LOW_THR_HI 0x8a /* Low threshold, MSB */
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#define VCNL4010_LOW_THR_LO 0x8b /* Low threshold, LSB */
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#define VCNL4010_HIGH_THR_HI 0x8c /* High threshold, MSB */
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#define VCNL4010_HIGH_THR_LO 0x8d /* High threshold, LSB */
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#define VCNL4010_ISR 0x8e /* Interrupt status */
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#define VCNL4200_AL_CONF 0x00 /* Ambient light configuration */
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#define VCNL4200_PS_CONF1 0x03 /* Proximity configuration */
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#define VCNL4200_PS_DATA 0x08 /* Proximity data */
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#define VCNL4200_AL_DATA 0x09 /* Ambient light data */
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#define VCNL4200_DEV_ID 0x0e /* Device ID, slave address and version */
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#define VCNL4040_DEV_ID 0x0c /* Device ID and version */
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/* Bit masks for COMMAND register */
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#define VCNL4000_AL_RDY BIT(6) /* ALS data ready? */
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#define VCNL4000_PS_RDY BIT(5) /* proximity data ready? */
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#define VCNL4000_AL_OD BIT(4) /* start on-demand ALS measurement */
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#define VCNL4000_PS_OD BIT(3) /* start on-demand proximity measurement */
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#define VCNL4000_ALS_EN BIT(2) /* start ALS measurement */
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#define VCNL4000_PROX_EN BIT(1) /* start proximity measurement */
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#define VCNL4000_SELF_TIMED_EN BIT(0) /* start self-timed measurement */
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/* Bit masks for interrupt registers. */
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#define VCNL4010_INT_THR_SEL BIT(0) /* Select threshold interrupt source */
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#define VCNL4010_INT_THR_EN BIT(1) /* Threshold interrupt type */
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#define VCNL4010_INT_ALS_EN BIT(2) /* Enable on ALS data ready */
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#define VCNL4010_INT_PROX_EN BIT(3) /* Enable on proximity data ready */
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#define VCNL4010_INT_THR_HIGH 0 /* High threshold exceeded */
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#define VCNL4010_INT_THR_LOW 1 /* Low threshold exceeded */
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#define VCNL4010_INT_ALS 2 /* ALS data ready */
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#define VCNL4010_INT_PROXIMITY 3 /* Proximity data ready */
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#define VCNL4010_INT_THR \
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(BIT(VCNL4010_INT_THR_LOW) | BIT(VCNL4010_INT_THR_HIGH))
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#define VCNL4010_INT_DRDY \
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(BIT(VCNL4010_INT_PROXIMITY) | BIT(VCNL4010_INT_ALS))
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static const int vcnl4010_prox_sampling_frequency[][2] = {
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{1, 950000},
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{3, 906250},
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{7, 812500},
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{16, 625000},
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{31, 250000},
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{62, 500000},
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{125, 0},
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{250, 0},
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};
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#define VCNL4000_SLEEP_DELAY_MS 2000 /* before we enter pm_runtime_suspend */
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enum vcnl4000_device_ids {
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VCNL4000,
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VCNL4010,
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VCNL4040,
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VCNL4200,
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};
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struct vcnl4200_channel {
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u8 reg;
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ktime_t last_measurement;
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ktime_t sampling_rate;
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struct mutex lock;
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};
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struct vcnl4000_data {
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struct i2c_client *client;
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enum vcnl4000_device_ids id;
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int rev;
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int al_scale;
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const struct vcnl4000_chip_spec *chip_spec;
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struct mutex vcnl4000_lock;
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struct vcnl4200_channel vcnl4200_al;
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struct vcnl4200_channel vcnl4200_ps;
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uint32_t near_level;
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};
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struct vcnl4000_chip_spec {
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const char *prod;
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struct iio_chan_spec const *channels;
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const int num_channels;
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const struct iio_info *info;
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bool irq_support;
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int (*init)(struct vcnl4000_data *data);
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int (*measure_light)(struct vcnl4000_data *data, int *val);
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int (*measure_proximity)(struct vcnl4000_data *data, int *val);
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int (*set_power_state)(struct vcnl4000_data *data, bool on);
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};
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static const struct i2c_device_id vcnl4000_id[] = {
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{ "vcnl4000", VCNL4000 },
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{ "vcnl4010", VCNL4010 },
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{ "vcnl4020", VCNL4010 },
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{ "vcnl4040", VCNL4040 },
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{ "vcnl4200", VCNL4200 },
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{ }
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};
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MODULE_DEVICE_TABLE(i2c, vcnl4000_id);
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static int vcnl4000_set_power_state(struct vcnl4000_data *data, bool on)
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{
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/* no suspend op */
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return 0;
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}
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static int vcnl4000_init(struct vcnl4000_data *data)
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{
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int ret, prod_id;
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ret = i2c_smbus_read_byte_data(data->client, VCNL4000_PROD_REV);
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if (ret < 0)
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return ret;
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prod_id = ret >> 4;
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switch (prod_id) {
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case VCNL4000_PROD_ID:
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if (data->id != VCNL4000)
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dev_warn(&data->client->dev,
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"wrong device id, use vcnl4000");
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break;
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case VCNL4010_PROD_ID:
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if (data->id != VCNL4010)
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dev_warn(&data->client->dev,
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"wrong device id, use vcnl4010/4020");
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break;
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default:
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return -ENODEV;
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}
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data->rev = ret & 0xf;
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data->al_scale = 250000;
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mutex_init(&data->vcnl4000_lock);
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return data->chip_spec->set_power_state(data, true);
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};
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static int vcnl4200_set_power_state(struct vcnl4000_data *data, bool on)
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{
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u16 val = on ? 0 /* power on */ : 1 /* shut down */;
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int ret;
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ret = i2c_smbus_write_word_data(data->client, VCNL4200_AL_CONF, val);
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if (ret < 0)
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return ret;
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ret = i2c_smbus_write_word_data(data->client, VCNL4200_PS_CONF1, val);
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if (ret < 0)
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return ret;
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if (on) {
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/* Wait at least one integration cycle before fetching data */
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data->vcnl4200_al.last_measurement = ktime_get();
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data->vcnl4200_ps.last_measurement = ktime_get();
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}
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return 0;
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}
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static int vcnl4200_init(struct vcnl4000_data *data)
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{
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int ret, id;
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ret = i2c_smbus_read_word_data(data->client, VCNL4200_DEV_ID);
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if (ret < 0)
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return ret;
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id = ret & 0xff;
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if (id != VCNL4200_PROD_ID) {
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ret = i2c_smbus_read_word_data(data->client, VCNL4040_DEV_ID);
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if (ret < 0)
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return ret;
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id = ret & 0xff;
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if (id != VCNL4040_PROD_ID)
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return -ENODEV;
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}
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dev_dbg(&data->client->dev, "device id 0x%x", id);
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data->rev = (ret >> 8) & 0xf;
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data->vcnl4200_al.reg = VCNL4200_AL_DATA;
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data->vcnl4200_ps.reg = VCNL4200_PS_DATA;
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switch (id) {
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case VCNL4200_PROD_ID:
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/* Default wait time is 50ms, add 20% tolerance. */
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data->vcnl4200_al.sampling_rate = ktime_set(0, 60000 * 1000);
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/* Default wait time is 4.8ms, add 20% tolerance. */
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data->vcnl4200_ps.sampling_rate = ktime_set(0, 5760 * 1000);
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data->al_scale = 24000;
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break;
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case VCNL4040_PROD_ID:
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/* Default wait time is 80ms, add 20% tolerance. */
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data->vcnl4200_al.sampling_rate = ktime_set(0, 96000 * 1000);
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/* Default wait time is 5ms, add 20% tolerance. */
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data->vcnl4200_ps.sampling_rate = ktime_set(0, 6000 * 1000);
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data->al_scale = 120000;
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break;
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}
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mutex_init(&data->vcnl4200_al.lock);
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mutex_init(&data->vcnl4200_ps.lock);
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ret = data->chip_spec->set_power_state(data, true);
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if (ret < 0)
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return ret;
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return 0;
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};
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static int vcnl4000_read_data(struct vcnl4000_data *data, u8 data_reg, int *val)
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{
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s32 ret;
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ret = i2c_smbus_read_word_swapped(data->client, data_reg);
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if (ret < 0)
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return ret;
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*val = ret;
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return 0;
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}
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static int vcnl4000_write_data(struct vcnl4000_data *data, u8 data_reg, int val)
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{
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if (val > U16_MAX)
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return -ERANGE;
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return i2c_smbus_write_word_swapped(data->client, data_reg, val);
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}
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static int vcnl4000_measure(struct vcnl4000_data *data, u8 req_mask,
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u8 rdy_mask, u8 data_reg, int *val)
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{
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int tries = 20;
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int ret;
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mutex_lock(&data->vcnl4000_lock);
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ret = i2c_smbus_write_byte_data(data->client, VCNL4000_COMMAND,
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req_mask);
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if (ret < 0)
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goto fail;
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/* wait for data to become ready */
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while (tries--) {
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ret = i2c_smbus_read_byte_data(data->client, VCNL4000_COMMAND);
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if (ret < 0)
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goto fail;
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if (ret & rdy_mask)
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break;
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msleep(20); /* measurement takes up to 100 ms */
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}
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if (tries < 0) {
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dev_err(&data->client->dev,
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"vcnl4000_measure() failed, data not ready\n");
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ret = -EIO;
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goto fail;
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}
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ret = vcnl4000_read_data(data, data_reg, val);
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if (ret < 0)
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goto fail;
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mutex_unlock(&data->vcnl4000_lock);
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return 0;
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fail:
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mutex_unlock(&data->vcnl4000_lock);
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return ret;
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}
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static int vcnl4200_measure(struct vcnl4000_data *data,
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struct vcnl4200_channel *chan, int *val)
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{
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int ret;
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s64 delta;
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ktime_t next_measurement;
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mutex_lock(&chan->lock);
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next_measurement = ktime_add(chan->last_measurement,
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chan->sampling_rate);
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delta = ktime_us_delta(next_measurement, ktime_get());
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if (delta > 0)
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usleep_range(delta, delta + 500);
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chan->last_measurement = ktime_get();
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mutex_unlock(&chan->lock);
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ret = i2c_smbus_read_word_data(data->client, chan->reg);
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if (ret < 0)
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return ret;
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*val = ret;
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return 0;
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}
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static int vcnl4000_measure_light(struct vcnl4000_data *data, int *val)
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{
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return vcnl4000_measure(data,
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VCNL4000_AL_OD, VCNL4000_AL_RDY,
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VCNL4000_AL_RESULT_HI, val);
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}
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static int vcnl4200_measure_light(struct vcnl4000_data *data, int *val)
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{
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return vcnl4200_measure(data, &data->vcnl4200_al, val);
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}
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static int vcnl4000_measure_proximity(struct vcnl4000_data *data, int *val)
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{
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return vcnl4000_measure(data,
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VCNL4000_PS_OD, VCNL4000_PS_RDY,
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VCNL4000_PS_RESULT_HI, val);
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}
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static int vcnl4200_measure_proximity(struct vcnl4000_data *data, int *val)
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{
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return vcnl4200_measure(data, &data->vcnl4200_ps, val);
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}
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static int vcnl4010_read_proxy_samp_freq(struct vcnl4000_data *data, int *val,
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int *val2)
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{
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int ret;
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ret = i2c_smbus_read_byte_data(data->client, VCNL4010_PROX_RATE);
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if (ret < 0)
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return ret;
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if (ret >= ARRAY_SIZE(vcnl4010_prox_sampling_frequency))
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return -EINVAL;
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*val = vcnl4010_prox_sampling_frequency[ret][0];
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*val2 = vcnl4010_prox_sampling_frequency[ret][1];
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return 0;
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}
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static bool vcnl4010_is_in_periodic_mode(struct vcnl4000_data *data)
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{
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int ret;
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ret = i2c_smbus_read_byte_data(data->client, VCNL4000_COMMAND);
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if (ret < 0)
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return false;
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return !!(ret & VCNL4000_SELF_TIMED_EN);
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}
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static int vcnl4000_set_pm_runtime_state(struct vcnl4000_data *data, bool on)
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{
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struct device *dev = &data->client->dev;
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int ret;
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if (on) {
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ret = pm_runtime_get_sync(dev);
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if (ret < 0)
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pm_runtime_put_noidle(dev);
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} else {
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pm_runtime_mark_last_busy(dev);
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ret = pm_runtime_put_autosuspend(dev);
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}
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return ret;
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}
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static int vcnl4000_read_raw(struct iio_dev *indio_dev,
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struct iio_chan_spec const *chan,
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int *val, int *val2, long mask)
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{
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int ret;
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struct vcnl4000_data *data = iio_priv(indio_dev);
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switch (mask) {
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case IIO_CHAN_INFO_RAW:
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ret = vcnl4000_set_pm_runtime_state(data, true);
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if (ret < 0)
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return ret;
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|
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switch (chan->type) {
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case IIO_LIGHT:
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ret = data->chip_spec->measure_light(data, val);
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if (!ret)
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ret = IIO_VAL_INT;
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break;
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case IIO_PROXIMITY:
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ret = data->chip_spec->measure_proximity(data, val);
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if (!ret)
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ret = IIO_VAL_INT;
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break;
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default:
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ret = -EINVAL;
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}
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vcnl4000_set_pm_runtime_state(data, false);
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return ret;
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case IIO_CHAN_INFO_SCALE:
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if (chan->type != IIO_LIGHT)
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return -EINVAL;
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|
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*val = 0;
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*val2 = data->al_scale;
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return IIO_VAL_INT_PLUS_MICRO;
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default:
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return -EINVAL;
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}
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}
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|
|
static int vcnl4010_read_raw(struct iio_dev *indio_dev,
|
|
struct iio_chan_spec const *chan,
|
|
int *val, int *val2, long mask)
|
|
{
|
|
int ret;
|
|
struct vcnl4000_data *data = iio_priv(indio_dev);
|
|
|
|
switch (mask) {
|
|
case IIO_CHAN_INFO_RAW:
|
|
case IIO_CHAN_INFO_SCALE:
|
|
ret = iio_device_claim_direct_mode(indio_dev);
|
|
if (ret)
|
|
return ret;
|
|
|
|
/* Protect against event capture. */
|
|
if (vcnl4010_is_in_periodic_mode(data)) {
|
|
ret = -EBUSY;
|
|
} else {
|
|
ret = vcnl4000_read_raw(indio_dev, chan, val, val2,
|
|
mask);
|
|
}
|
|
|
|
iio_device_release_direct_mode(indio_dev);
|
|
return ret;
|
|
case IIO_CHAN_INFO_SAMP_FREQ:
|
|
switch (chan->type) {
|
|
case IIO_PROXIMITY:
|
|
ret = vcnl4010_read_proxy_samp_freq(data, val, val2);
|
|
if (ret < 0)
|
|
return ret;
|
|
return IIO_VAL_INT_PLUS_MICRO;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
|
|
static int vcnl4010_read_avail(struct iio_dev *indio_dev,
|
|
struct iio_chan_spec const *chan,
|
|
const int **vals, int *type, int *length,
|
|
long mask)
|
|
{
|
|
switch (mask) {
|
|
case IIO_CHAN_INFO_SAMP_FREQ:
|
|
*vals = (int *)vcnl4010_prox_sampling_frequency;
|
|
*type = IIO_VAL_INT_PLUS_MICRO;
|
|
*length = 2 * ARRAY_SIZE(vcnl4010_prox_sampling_frequency);
|
|
return IIO_AVAIL_LIST;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
|
|
static int vcnl4010_write_proxy_samp_freq(struct vcnl4000_data *data, int val,
|
|
int val2)
|
|
{
|
|
unsigned int i;
|
|
int index = -1;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(vcnl4010_prox_sampling_frequency); i++) {
|
|
if (val == vcnl4010_prox_sampling_frequency[i][0] &&
|
|
val2 == vcnl4010_prox_sampling_frequency[i][1]) {
|
|
index = i;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (index < 0)
|
|
return -EINVAL;
|
|
|
|
return i2c_smbus_write_byte_data(data->client, VCNL4010_PROX_RATE,
|
|
index);
|
|
}
|
|
|
|
static int vcnl4010_write_raw(struct iio_dev *indio_dev,
|
|
struct iio_chan_spec const *chan,
|
|
int val, int val2, long mask)
|
|
{
|
|
int ret;
|
|
struct vcnl4000_data *data = iio_priv(indio_dev);
|
|
|
|
ret = iio_device_claim_direct_mode(indio_dev);
|
|
if (ret)
|
|
return ret;
|
|
|
|
/* Protect against event capture. */
|
|
if (vcnl4010_is_in_periodic_mode(data)) {
|
|
ret = -EBUSY;
|
|
goto end;
|
|
}
|
|
|
|
switch (mask) {
|
|
case IIO_CHAN_INFO_SAMP_FREQ:
|
|
switch (chan->type) {
|
|
case IIO_PROXIMITY:
|
|
ret = vcnl4010_write_proxy_samp_freq(data, val, val2);
|
|
goto end;
|
|
default:
|
|
ret = -EINVAL;
|
|
goto end;
|
|
}
|
|
default:
|
|
ret = -EINVAL;
|
|
goto end;
|
|
}
|
|
|
|
end:
|
|
iio_device_release_direct_mode(indio_dev);
|
|
return ret;
|
|
}
|
|
|
|
static int vcnl4010_read_event(struct iio_dev *indio_dev,
|
|
const struct iio_chan_spec *chan,
|
|
enum iio_event_type type,
|
|
enum iio_event_direction dir,
|
|
enum iio_event_info info,
|
|
int *val, int *val2)
|
|
{
|
|
int ret;
|
|
struct vcnl4000_data *data = iio_priv(indio_dev);
|
|
|
|
switch (info) {
|
|
case IIO_EV_INFO_VALUE:
|
|
switch (dir) {
|
|
case IIO_EV_DIR_RISING:
|
|
ret = vcnl4000_read_data(data, VCNL4010_HIGH_THR_HI,
|
|
val);
|
|
if (ret < 0)
|
|
return ret;
|
|
return IIO_VAL_INT;
|
|
case IIO_EV_DIR_FALLING:
|
|
ret = vcnl4000_read_data(data, VCNL4010_LOW_THR_HI,
|
|
val);
|
|
if (ret < 0)
|
|
return ret;
|
|
return IIO_VAL_INT;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
|
|
static int vcnl4010_write_event(struct iio_dev *indio_dev,
|
|
const struct iio_chan_spec *chan,
|
|
enum iio_event_type type,
|
|
enum iio_event_direction dir,
|
|
enum iio_event_info info,
|
|
int val, int val2)
|
|
{
|
|
int ret;
|
|
struct vcnl4000_data *data = iio_priv(indio_dev);
|
|
|
|
switch (info) {
|
|
case IIO_EV_INFO_VALUE:
|
|
switch (dir) {
|
|
case IIO_EV_DIR_RISING:
|
|
ret = vcnl4000_write_data(data, VCNL4010_HIGH_THR_HI,
|
|
val);
|
|
if (ret < 0)
|
|
return ret;
|
|
return IIO_VAL_INT;
|
|
case IIO_EV_DIR_FALLING:
|
|
ret = vcnl4000_write_data(data, VCNL4010_LOW_THR_HI,
|
|
val);
|
|
if (ret < 0)
|
|
return ret;
|
|
return IIO_VAL_INT;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
|
|
static bool vcnl4010_is_thr_enabled(struct vcnl4000_data *data)
|
|
{
|
|
int ret;
|
|
|
|
ret = i2c_smbus_read_byte_data(data->client, VCNL4010_INT_CTRL);
|
|
if (ret < 0)
|
|
return false;
|
|
|
|
return !!(ret & VCNL4010_INT_THR_EN);
|
|
}
|
|
|
|
static int vcnl4010_read_event_config(struct iio_dev *indio_dev,
|
|
const struct iio_chan_spec *chan,
|
|
enum iio_event_type type,
|
|
enum iio_event_direction dir)
|
|
{
|
|
struct vcnl4000_data *data = iio_priv(indio_dev);
|
|
|
|
switch (chan->type) {
|
|
case IIO_PROXIMITY:
|
|
return vcnl4010_is_thr_enabled(data);
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
|
|
static int vcnl4010_config_threshold(struct iio_dev *indio_dev, bool state)
|
|
{
|
|
struct vcnl4000_data *data = iio_priv(indio_dev);
|
|
int ret;
|
|
int icr;
|
|
int command;
|
|
|
|
if (state) {
|
|
ret = iio_device_claim_direct_mode(indio_dev);
|
|
if (ret)
|
|
return ret;
|
|
|
|
/* Enable periodic measurement of proximity data. */
|
|
command = VCNL4000_SELF_TIMED_EN | VCNL4000_PROX_EN;
|
|
|
|
/*
|
|
* Enable interrupts on threshold, for proximity data by
|
|
* default.
|
|
*/
|
|
icr = VCNL4010_INT_THR_EN;
|
|
} else {
|
|
if (!vcnl4010_is_thr_enabled(data))
|
|
return 0;
|
|
|
|
command = 0;
|
|
icr = 0;
|
|
}
|
|
|
|
ret = i2c_smbus_write_byte_data(data->client, VCNL4000_COMMAND,
|
|
command);
|
|
if (ret < 0)
|
|
goto end;
|
|
|
|
ret = i2c_smbus_write_byte_data(data->client, VCNL4010_INT_CTRL, icr);
|
|
|
|
end:
|
|
if (state)
|
|
iio_device_release_direct_mode(indio_dev);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int vcnl4010_write_event_config(struct iio_dev *indio_dev,
|
|
const struct iio_chan_spec *chan,
|
|
enum iio_event_type type,
|
|
enum iio_event_direction dir,
|
|
int state)
|
|
{
|
|
switch (chan->type) {
|
|
case IIO_PROXIMITY:
|
|
return vcnl4010_config_threshold(indio_dev, state);
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
|
|
static ssize_t vcnl4000_read_near_level(struct iio_dev *indio_dev,
|
|
uintptr_t priv,
|
|
const struct iio_chan_spec *chan,
|
|
char *buf)
|
|
{
|
|
struct vcnl4000_data *data = iio_priv(indio_dev);
|
|
|
|
return sprintf(buf, "%u\n", data->near_level);
|
|
}
|
|
|
|
static const struct iio_chan_spec_ext_info vcnl4000_ext_info[] = {
|
|
{
|
|
.name = "nearlevel",
|
|
.shared = IIO_SEPARATE,
|
|
.read = vcnl4000_read_near_level,
|
|
},
|
|
{ /* sentinel */ }
|
|
};
|
|
|
|
static const struct iio_event_spec vcnl4000_event_spec[] = {
|
|
{
|
|
.type = IIO_EV_TYPE_THRESH,
|
|
.dir = IIO_EV_DIR_RISING,
|
|
.mask_separate = BIT(IIO_EV_INFO_VALUE),
|
|
}, {
|
|
.type = IIO_EV_TYPE_THRESH,
|
|
.dir = IIO_EV_DIR_FALLING,
|
|
.mask_separate = BIT(IIO_EV_INFO_VALUE),
|
|
}, {
|
|
.type = IIO_EV_TYPE_THRESH,
|
|
.dir = IIO_EV_DIR_EITHER,
|
|
.mask_separate = BIT(IIO_EV_INFO_ENABLE),
|
|
}
|
|
};
|
|
|
|
static const struct iio_chan_spec vcnl4000_channels[] = {
|
|
{
|
|
.type = IIO_LIGHT,
|
|
.info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
|
|
BIT(IIO_CHAN_INFO_SCALE),
|
|
}, {
|
|
.type = IIO_PROXIMITY,
|
|
.info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
|
|
.ext_info = vcnl4000_ext_info,
|
|
}
|
|
};
|
|
|
|
static const struct iio_chan_spec vcnl4010_channels[] = {
|
|
{
|
|
.type = IIO_LIGHT,
|
|
.scan_index = -1,
|
|
.info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
|
|
BIT(IIO_CHAN_INFO_SCALE),
|
|
}, {
|
|
.type = IIO_PROXIMITY,
|
|
.scan_index = 0,
|
|
.info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
|
|
BIT(IIO_CHAN_INFO_SAMP_FREQ),
|
|
.info_mask_separate_available = BIT(IIO_CHAN_INFO_SAMP_FREQ),
|
|
.event_spec = vcnl4000_event_spec,
|
|
.num_event_specs = ARRAY_SIZE(vcnl4000_event_spec),
|
|
.ext_info = vcnl4000_ext_info,
|
|
.scan_type = {
|
|
.sign = 'u',
|
|
.realbits = 16,
|
|
.storagebits = 16,
|
|
.endianness = IIO_CPU,
|
|
},
|
|
},
|
|
IIO_CHAN_SOFT_TIMESTAMP(1),
|
|
};
|
|
|
|
static const struct iio_info vcnl4000_info = {
|
|
.read_raw = vcnl4000_read_raw,
|
|
};
|
|
|
|
static const struct iio_info vcnl4010_info = {
|
|
.read_raw = vcnl4010_read_raw,
|
|
.read_avail = vcnl4010_read_avail,
|
|
.write_raw = vcnl4010_write_raw,
|
|
.read_event_value = vcnl4010_read_event,
|
|
.write_event_value = vcnl4010_write_event,
|
|
.read_event_config = vcnl4010_read_event_config,
|
|
.write_event_config = vcnl4010_write_event_config,
|
|
};
|
|
|
|
static const struct vcnl4000_chip_spec vcnl4000_chip_spec_cfg[] = {
|
|
[VCNL4000] = {
|
|
.prod = "VCNL4000",
|
|
.init = vcnl4000_init,
|
|
.measure_light = vcnl4000_measure_light,
|
|
.measure_proximity = vcnl4000_measure_proximity,
|
|
.set_power_state = vcnl4000_set_power_state,
|
|
.channels = vcnl4000_channels,
|
|
.num_channels = ARRAY_SIZE(vcnl4000_channels),
|
|
.info = &vcnl4000_info,
|
|
.irq_support = false,
|
|
},
|
|
[VCNL4010] = {
|
|
.prod = "VCNL4010/4020",
|
|
.init = vcnl4000_init,
|
|
.measure_light = vcnl4000_measure_light,
|
|
.measure_proximity = vcnl4000_measure_proximity,
|
|
.set_power_state = vcnl4000_set_power_state,
|
|
.channels = vcnl4010_channels,
|
|
.num_channels = ARRAY_SIZE(vcnl4010_channels),
|
|
.info = &vcnl4010_info,
|
|
.irq_support = true,
|
|
},
|
|
[VCNL4040] = {
|
|
.prod = "VCNL4040",
|
|
.init = vcnl4200_init,
|
|
.measure_light = vcnl4200_measure_light,
|
|
.measure_proximity = vcnl4200_measure_proximity,
|
|
.set_power_state = vcnl4200_set_power_state,
|
|
.channels = vcnl4000_channels,
|
|
.num_channels = ARRAY_SIZE(vcnl4000_channels),
|
|
.info = &vcnl4000_info,
|
|
.irq_support = false,
|
|
},
|
|
[VCNL4200] = {
|
|
.prod = "VCNL4200",
|
|
.init = vcnl4200_init,
|
|
.measure_light = vcnl4200_measure_light,
|
|
.measure_proximity = vcnl4200_measure_proximity,
|
|
.set_power_state = vcnl4200_set_power_state,
|
|
.channels = vcnl4000_channels,
|
|
.num_channels = ARRAY_SIZE(vcnl4000_channels),
|
|
.info = &vcnl4000_info,
|
|
.irq_support = false,
|
|
},
|
|
};
|
|
|
|
static irqreturn_t vcnl4010_irq_thread(int irq, void *p)
|
|
{
|
|
struct iio_dev *indio_dev = p;
|
|
struct vcnl4000_data *data = iio_priv(indio_dev);
|
|
unsigned long isr;
|
|
int ret;
|
|
|
|
ret = i2c_smbus_read_byte_data(data->client, VCNL4010_ISR);
|
|
if (ret < 0)
|
|
goto end;
|
|
|
|
isr = ret;
|
|
|
|
if (isr & VCNL4010_INT_THR) {
|
|
if (test_bit(VCNL4010_INT_THR_LOW, &isr)) {
|
|
iio_push_event(indio_dev,
|
|
IIO_UNMOD_EVENT_CODE(
|
|
IIO_PROXIMITY,
|
|
1,
|
|
IIO_EV_TYPE_THRESH,
|
|
IIO_EV_DIR_FALLING),
|
|
iio_get_time_ns(indio_dev));
|
|
}
|
|
|
|
if (test_bit(VCNL4010_INT_THR_HIGH, &isr)) {
|
|
iio_push_event(indio_dev,
|
|
IIO_UNMOD_EVENT_CODE(
|
|
IIO_PROXIMITY,
|
|
1,
|
|
IIO_EV_TYPE_THRESH,
|
|
IIO_EV_DIR_RISING),
|
|
iio_get_time_ns(indio_dev));
|
|
}
|
|
|
|
i2c_smbus_write_byte_data(data->client, VCNL4010_ISR,
|
|
isr & VCNL4010_INT_THR);
|
|
}
|
|
|
|
if (isr & VCNL4010_INT_DRDY && iio_buffer_enabled(indio_dev))
|
|
iio_trigger_poll_chained(indio_dev->trig);
|
|
|
|
end:
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
static irqreturn_t vcnl4010_trigger_handler(int irq, void *p)
|
|
{
|
|
struct iio_poll_func *pf = p;
|
|
struct iio_dev *indio_dev = pf->indio_dev;
|
|
struct vcnl4000_data *data = iio_priv(indio_dev);
|
|
const unsigned long *active_scan_mask = indio_dev->active_scan_mask;
|
|
u16 buffer[8] = {0}; /* 1x16-bit + ts */
|
|
bool data_read = false;
|
|
unsigned long isr;
|
|
int val = 0;
|
|
int ret;
|
|
|
|
ret = i2c_smbus_read_byte_data(data->client, VCNL4010_ISR);
|
|
if (ret < 0)
|
|
goto end;
|
|
|
|
isr = ret;
|
|
|
|
if (test_bit(0, active_scan_mask)) {
|
|
if (test_bit(VCNL4010_INT_PROXIMITY, &isr)) {
|
|
ret = vcnl4000_read_data(data,
|
|
VCNL4000_PS_RESULT_HI,
|
|
&val);
|
|
if (ret < 0)
|
|
goto end;
|
|
|
|
buffer[0] = val;
|
|
data_read = true;
|
|
}
|
|
}
|
|
|
|
ret = i2c_smbus_write_byte_data(data->client, VCNL4010_ISR,
|
|
isr & VCNL4010_INT_DRDY);
|
|
if (ret < 0)
|
|
goto end;
|
|
|
|
if (!data_read)
|
|
goto end;
|
|
|
|
iio_push_to_buffers_with_timestamp(indio_dev, buffer,
|
|
iio_get_time_ns(indio_dev));
|
|
|
|
end:
|
|
iio_trigger_notify_done(indio_dev->trig);
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
static int vcnl4010_buffer_postenable(struct iio_dev *indio_dev)
|
|
{
|
|
struct vcnl4000_data *data = iio_priv(indio_dev);
|
|
int ret;
|
|
int cmd;
|
|
|
|
/* Do not enable the buffer if we are already capturing events. */
|
|
if (vcnl4010_is_in_periodic_mode(data))
|
|
return -EBUSY;
|
|
|
|
ret = i2c_smbus_write_byte_data(data->client, VCNL4010_INT_CTRL,
|
|
VCNL4010_INT_PROX_EN);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
cmd = VCNL4000_SELF_TIMED_EN | VCNL4000_PROX_EN;
|
|
return i2c_smbus_write_byte_data(data->client, VCNL4000_COMMAND, cmd);
|
|
}
|
|
|
|
static int vcnl4010_buffer_predisable(struct iio_dev *indio_dev)
|
|
{
|
|
struct vcnl4000_data *data = iio_priv(indio_dev);
|
|
int ret;
|
|
|
|
ret = i2c_smbus_write_byte_data(data->client, VCNL4010_INT_CTRL, 0);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
return i2c_smbus_write_byte_data(data->client, VCNL4000_COMMAND, 0);
|
|
}
|
|
|
|
static const struct iio_buffer_setup_ops vcnl4010_buffer_ops = {
|
|
.postenable = &vcnl4010_buffer_postenable,
|
|
.predisable = &vcnl4010_buffer_predisable,
|
|
};
|
|
|
|
static const struct iio_trigger_ops vcnl4010_trigger_ops = {
|
|
.validate_device = iio_trigger_validate_own_device,
|
|
};
|
|
|
|
static int vcnl4010_probe_trigger(struct iio_dev *indio_dev)
|
|
{
|
|
struct vcnl4000_data *data = iio_priv(indio_dev);
|
|
struct i2c_client *client = data->client;
|
|
struct iio_trigger *trigger;
|
|
|
|
trigger = devm_iio_trigger_alloc(&client->dev, "%s-dev%d",
|
|
indio_dev->name, indio_dev->id);
|
|
if (!trigger)
|
|
return -ENOMEM;
|
|
|
|
trigger->ops = &vcnl4010_trigger_ops;
|
|
iio_trigger_set_drvdata(trigger, indio_dev);
|
|
|
|
return devm_iio_trigger_register(&client->dev, trigger);
|
|
}
|
|
|
|
static int vcnl4000_probe(struct i2c_client *client,
|
|
const struct i2c_device_id *id)
|
|
{
|
|
struct vcnl4000_data *data;
|
|
struct iio_dev *indio_dev;
|
|
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->id = id->driver_data;
|
|
data->chip_spec = &vcnl4000_chip_spec_cfg[data->id];
|
|
|
|
ret = data->chip_spec->init(data);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
dev_dbg(&client->dev, "%s Ambient light/proximity sensor, Rev: %02x\n",
|
|
data->chip_spec->prod, data->rev);
|
|
|
|
if (device_property_read_u32(&client->dev, "proximity-near-level",
|
|
&data->near_level))
|
|
data->near_level = 0;
|
|
|
|
indio_dev->info = data->chip_spec->info;
|
|
indio_dev->channels = data->chip_spec->channels;
|
|
indio_dev->num_channels = data->chip_spec->num_channels;
|
|
indio_dev->name = VCNL4000_DRV_NAME;
|
|
indio_dev->modes = INDIO_DIRECT_MODE;
|
|
|
|
if (client->irq && data->chip_spec->irq_support) {
|
|
ret = devm_iio_triggered_buffer_setup(&client->dev, indio_dev,
|
|
NULL,
|
|
vcnl4010_trigger_handler,
|
|
&vcnl4010_buffer_ops);
|
|
if (ret < 0) {
|
|
dev_err(&client->dev,
|
|
"unable to setup iio triggered buffer\n");
|
|
return ret;
|
|
}
|
|
|
|
ret = devm_request_threaded_irq(&client->dev, client->irq,
|
|
NULL, vcnl4010_irq_thread,
|
|
IRQF_TRIGGER_FALLING |
|
|
IRQF_ONESHOT,
|
|
"vcnl4010_irq",
|
|
indio_dev);
|
|
if (ret < 0) {
|
|
dev_err(&client->dev, "irq request failed\n");
|
|
return ret;
|
|
}
|
|
|
|
ret = vcnl4010_probe_trigger(indio_dev);
|
|
if (ret < 0)
|
|
return ret;
|
|
}
|
|
|
|
ret = pm_runtime_set_active(&client->dev);
|
|
if (ret < 0)
|
|
goto fail_poweroff;
|
|
|
|
ret = iio_device_register(indio_dev);
|
|
if (ret < 0)
|
|
goto fail_poweroff;
|
|
|
|
pm_runtime_enable(&client->dev);
|
|
pm_runtime_set_autosuspend_delay(&client->dev, VCNL4000_SLEEP_DELAY_MS);
|
|
pm_runtime_use_autosuspend(&client->dev);
|
|
|
|
return 0;
|
|
fail_poweroff:
|
|
data->chip_spec->set_power_state(data, false);
|
|
return ret;
|
|
}
|
|
|
|
static const struct of_device_id vcnl_4000_of_match[] = {
|
|
{
|
|
.compatible = "vishay,vcnl4000",
|
|
.data = (void *)VCNL4000,
|
|
},
|
|
{
|
|
.compatible = "vishay,vcnl4010",
|
|
.data = (void *)VCNL4010,
|
|
},
|
|
{
|
|
.compatible = "vishay,vcnl4020",
|
|
.data = (void *)VCNL4010,
|
|
},
|
|
{
|
|
.compatible = "vishay,vcnl4040",
|
|
.data = (void *)VCNL4040,
|
|
},
|
|
{
|
|
.compatible = "vishay,vcnl4200",
|
|
.data = (void *)VCNL4200,
|
|
},
|
|
{},
|
|
};
|
|
MODULE_DEVICE_TABLE(of, vcnl_4000_of_match);
|
|
|
|
static int vcnl4000_remove(struct i2c_client *client)
|
|
{
|
|
struct iio_dev *indio_dev = i2c_get_clientdata(client);
|
|
struct vcnl4000_data *data = iio_priv(indio_dev);
|
|
|
|
pm_runtime_dont_use_autosuspend(&client->dev);
|
|
pm_runtime_disable(&client->dev);
|
|
iio_device_unregister(indio_dev);
|
|
pm_runtime_set_suspended(&client->dev);
|
|
|
|
return data->chip_spec->set_power_state(data, false);
|
|
}
|
|
|
|
static int __maybe_unused vcnl4000_runtime_suspend(struct device *dev)
|
|
{
|
|
struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
|
|
struct vcnl4000_data *data = iio_priv(indio_dev);
|
|
|
|
return data->chip_spec->set_power_state(data, false);
|
|
}
|
|
|
|
static int __maybe_unused vcnl4000_runtime_resume(struct device *dev)
|
|
{
|
|
struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
|
|
struct vcnl4000_data *data = iio_priv(indio_dev);
|
|
|
|
return data->chip_spec->set_power_state(data, true);
|
|
}
|
|
|
|
static const struct dev_pm_ops vcnl4000_pm_ops = {
|
|
SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
|
|
pm_runtime_force_resume)
|
|
SET_RUNTIME_PM_OPS(vcnl4000_runtime_suspend,
|
|
vcnl4000_runtime_resume, NULL)
|
|
};
|
|
|
|
static struct i2c_driver vcnl4000_driver = {
|
|
.driver = {
|
|
.name = VCNL4000_DRV_NAME,
|
|
.pm = &vcnl4000_pm_ops,
|
|
.of_match_table = vcnl_4000_of_match,
|
|
},
|
|
.probe = vcnl4000_probe,
|
|
.id_table = vcnl4000_id,
|
|
.remove = vcnl4000_remove,
|
|
};
|
|
|
|
module_i2c_driver(vcnl4000_driver);
|
|
|
|
MODULE_AUTHOR("Peter Meerwald <pmeerw@pmeerw.net>");
|
|
MODULE_AUTHOR("Mathieu Othacehe <m.othacehe@gmail.com>");
|
|
MODULE_DESCRIPTION("Vishay VCNL4000 proximity/ambient light sensor driver");
|
|
MODULE_LICENSE("GPL");
|