1137 строки
27 KiB
C
1137 строки
27 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* apds9960.c - Support for Avago APDS9960 gesture/RGB/ALS/proximity sensor
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*
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* Copyright (C) 2015, 2018
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* Author: Matt Ranostay <matt.ranostay@konsulko.com>
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*
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* TODO: gesture + proximity calib offsets
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*/
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/interrupt.h>
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#include <linux/delay.h>
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#include <linux/mutex.h>
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#include <linux/err.h>
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#include <linux/irq.h>
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#include <linux/i2c.h>
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#include <linux/pm_runtime.h>
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#include <linux/regmap.h>
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#include <linux/iio/iio.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/kfifo_buf.h>
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#include <linux/iio/sysfs.h>
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#define APDS9960_REGMAP_NAME "apds9960_regmap"
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#define APDS9960_DRV_NAME "apds9960"
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#define APDS9960_REG_RAM_START 0x00
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#define APDS9960_REG_RAM_END 0x7f
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#define APDS9960_REG_ENABLE 0x80
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#define APDS9960_REG_ATIME 0x81
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#define APDS9960_REG_WTIME 0x83
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#define APDS9960_REG_AILTL 0x84
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#define APDS9960_REG_AILTH 0x85
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#define APDS9960_REG_AIHTL 0x86
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#define APDS9960_REG_AIHTH 0x87
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#define APDS9960_REG_PILT 0x89
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#define APDS9960_REG_PIHT 0x8b
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#define APDS9960_REG_PERS 0x8c
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#define APDS9960_REG_CONFIG_1 0x8d
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#define APDS9960_REG_PPULSE 0x8e
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#define APDS9960_REG_CONTROL 0x8f
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#define APDS9960_REG_CONTROL_AGAIN_MASK 0x03
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#define APDS9960_REG_CONTROL_PGAIN_MASK 0x0c
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#define APDS9960_REG_CONTROL_AGAIN_MASK_SHIFT 0
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#define APDS9960_REG_CONTROL_PGAIN_MASK_SHIFT 2
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#define APDS9960_REG_CONFIG_2 0x90
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#define APDS9960_REG_CONFIG_2_GGAIN_MASK 0x60
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#define APDS9960_REG_CONFIG_2_GGAIN_MASK_SHIFT 5
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#define APDS9960_REG_ID 0x92
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#define APDS9960_REG_STATUS 0x93
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#define APDS9960_REG_STATUS_PS_INT BIT(5)
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#define APDS9960_REG_STATUS_ALS_INT BIT(4)
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#define APDS9960_REG_STATUS_GINT BIT(2)
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#define APDS9960_REG_PDATA 0x9c
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#define APDS9960_REG_POFFSET_UR 0x9d
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#define APDS9960_REG_POFFSET_DL 0x9e
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#define APDS9960_REG_CONFIG_3 0x9f
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#define APDS9960_REG_GPENTH 0xa0
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#define APDS9960_REG_GEXTH 0xa1
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#define APDS9960_REG_GCONF_1 0xa2
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#define APDS9960_REG_GCONF_1_GFIFO_THRES_MASK 0xc0
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#define APDS9960_REG_GCONF_1_GFIFO_THRES_MASK_SHIFT 6
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#define APDS9960_REG_GCONF_2 0xa3
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#define APDS9960_REG_GOFFSET_U 0xa4
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#define APDS9960_REG_GOFFSET_D 0xa5
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#define APDS9960_REG_GPULSE 0xa6
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#define APDS9960_REG_GOFFSET_L 0xa7
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#define APDS9960_REG_GOFFSET_R 0xa9
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#define APDS9960_REG_GCONF_3 0xaa
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#define APDS9960_REG_GCONF_4 0xab
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#define APDS9960_REG_GFLVL 0xae
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#define APDS9960_REG_GSTATUS 0xaf
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#define APDS9960_REG_IFORCE 0xe4
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#define APDS9960_REG_PICLEAR 0xe5
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#define APDS9960_REG_CICLEAR 0xe6
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#define APDS9960_REG_AICLEAR 0xe7
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#define APDS9960_DEFAULT_PERS 0x33
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#define APDS9960_DEFAULT_GPENTH 0x50
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#define APDS9960_DEFAULT_GEXTH 0x40
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#define APDS9960_MAX_PXS_THRES_VAL 255
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#define APDS9960_MAX_ALS_THRES_VAL 0xffff
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#define APDS9960_MAX_INT_TIME_IN_US 1000000
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enum apds9960_als_channel_idx {
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IDX_ALS_CLEAR, IDX_ALS_RED, IDX_ALS_GREEN, IDX_ALS_BLUE,
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};
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#define APDS9960_REG_ALS_BASE 0x94
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#define APDS9960_REG_ALS_CHANNEL(_colour) \
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(APDS9960_REG_ALS_BASE + (IDX_ALS_##_colour * 2))
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enum apds9960_gesture_channel_idx {
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IDX_DIR_UP, IDX_DIR_DOWN, IDX_DIR_LEFT, IDX_DIR_RIGHT,
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};
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#define APDS9960_REG_GFIFO_BASE 0xfc
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#define APDS9960_REG_GFIFO_DIR(_dir) \
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(APDS9960_REG_GFIFO_BASE + IDX_DIR_##_dir)
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struct apds9960_data {
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struct i2c_client *client;
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struct iio_dev *indio_dev;
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struct mutex lock;
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/* regmap fields */
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struct regmap *regmap;
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struct regmap_field *reg_int_als;
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struct regmap_field *reg_int_ges;
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struct regmap_field *reg_int_pxs;
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struct regmap_field *reg_enable_als;
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struct regmap_field *reg_enable_ges;
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struct regmap_field *reg_enable_pxs;
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/* state */
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int als_int;
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int pxs_int;
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int gesture_mode_running;
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/* gain values */
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int als_gain;
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int pxs_gain;
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/* integration time value in us */
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int als_adc_int_us;
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/* gesture buffer */
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u8 buffer[4]; /* 4 8-bit channels */
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};
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static const struct reg_default apds9960_reg_defaults[] = {
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/* Default ALS integration time = 2.48ms */
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{ APDS9960_REG_ATIME, 0xff },
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};
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static const struct regmap_range apds9960_volatile_ranges[] = {
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regmap_reg_range(APDS9960_REG_STATUS,
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APDS9960_REG_PDATA),
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regmap_reg_range(APDS9960_REG_GFLVL,
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APDS9960_REG_GSTATUS),
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regmap_reg_range(APDS9960_REG_GFIFO_DIR(UP),
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APDS9960_REG_GFIFO_DIR(RIGHT)),
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regmap_reg_range(APDS9960_REG_IFORCE,
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APDS9960_REG_AICLEAR),
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};
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static const struct regmap_access_table apds9960_volatile_table = {
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.yes_ranges = apds9960_volatile_ranges,
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.n_yes_ranges = ARRAY_SIZE(apds9960_volatile_ranges),
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};
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static const struct regmap_range apds9960_precious_ranges[] = {
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regmap_reg_range(APDS9960_REG_RAM_START, APDS9960_REG_RAM_END),
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};
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static const struct regmap_access_table apds9960_precious_table = {
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.yes_ranges = apds9960_precious_ranges,
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.n_yes_ranges = ARRAY_SIZE(apds9960_precious_ranges),
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};
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static const struct regmap_range apds9960_readable_ranges[] = {
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regmap_reg_range(APDS9960_REG_ENABLE,
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APDS9960_REG_GSTATUS),
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regmap_reg_range(APDS9960_REG_GFIFO_DIR(UP),
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APDS9960_REG_GFIFO_DIR(RIGHT)),
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};
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static const struct regmap_access_table apds9960_readable_table = {
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.yes_ranges = apds9960_readable_ranges,
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.n_yes_ranges = ARRAY_SIZE(apds9960_readable_ranges),
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};
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static const struct regmap_range apds9960_writeable_ranges[] = {
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regmap_reg_range(APDS9960_REG_ENABLE, APDS9960_REG_CONFIG_2),
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regmap_reg_range(APDS9960_REG_POFFSET_UR, APDS9960_REG_GCONF_4),
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regmap_reg_range(APDS9960_REG_IFORCE, APDS9960_REG_AICLEAR),
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};
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static const struct regmap_access_table apds9960_writeable_table = {
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.yes_ranges = apds9960_writeable_ranges,
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.n_yes_ranges = ARRAY_SIZE(apds9960_writeable_ranges),
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};
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static const struct regmap_config apds9960_regmap_config = {
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.name = APDS9960_REGMAP_NAME,
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.reg_bits = 8,
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.val_bits = 8,
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.use_single_read = true,
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.use_single_write = true,
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.volatile_table = &apds9960_volatile_table,
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.precious_table = &apds9960_precious_table,
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.rd_table = &apds9960_readable_table,
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.wr_table = &apds9960_writeable_table,
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.reg_defaults = apds9960_reg_defaults,
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.num_reg_defaults = ARRAY_SIZE(apds9960_reg_defaults),
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.max_register = APDS9960_REG_GFIFO_DIR(RIGHT),
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.cache_type = REGCACHE_RBTREE,
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};
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static const struct iio_event_spec apds9960_pxs_event_spec[] = {
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{
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.type = IIO_EV_TYPE_THRESH,
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.dir = IIO_EV_DIR_RISING,
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.mask_separate = BIT(IIO_EV_INFO_VALUE) |
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BIT(IIO_EV_INFO_ENABLE),
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},
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{
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.type = IIO_EV_TYPE_THRESH,
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.dir = IIO_EV_DIR_FALLING,
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.mask_separate = BIT(IIO_EV_INFO_VALUE) |
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BIT(IIO_EV_INFO_ENABLE),
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},
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};
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static const struct iio_event_spec apds9960_als_event_spec[] = {
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{
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.type = IIO_EV_TYPE_THRESH,
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.dir = IIO_EV_DIR_RISING,
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.mask_separate = BIT(IIO_EV_INFO_VALUE) |
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BIT(IIO_EV_INFO_ENABLE),
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},
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{
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.type = IIO_EV_TYPE_THRESH,
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.dir = IIO_EV_DIR_FALLING,
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.mask_separate = BIT(IIO_EV_INFO_VALUE) |
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BIT(IIO_EV_INFO_ENABLE),
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},
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};
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#define APDS9960_GESTURE_CHANNEL(_dir, _si) { \
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.type = IIO_PROXIMITY, \
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.channel = _si + 1, \
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.scan_index = _si, \
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.indexed = 1, \
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.scan_type = { \
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.sign = 'u', \
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.realbits = 8, \
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.storagebits = 8, \
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}, \
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}
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#define APDS9960_INTENSITY_CHANNEL(_colour) { \
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.type = IIO_INTENSITY, \
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.info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \
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.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE) | \
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BIT(IIO_CHAN_INFO_INT_TIME), \
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.channel2 = IIO_MOD_LIGHT_##_colour, \
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.address = APDS9960_REG_ALS_CHANNEL(_colour), \
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.modified = 1, \
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.scan_index = -1, \
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}
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static const unsigned long apds9960_scan_masks[] = {0xf, 0};
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static const struct iio_chan_spec apds9960_channels[] = {
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{
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.type = IIO_PROXIMITY,
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.address = APDS9960_REG_PDATA,
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.info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
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.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE),
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.channel = 0,
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.indexed = 0,
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.scan_index = -1,
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.event_spec = apds9960_pxs_event_spec,
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.num_event_specs = ARRAY_SIZE(apds9960_pxs_event_spec),
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},
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/* Gesture Sensor */
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APDS9960_GESTURE_CHANNEL(UP, 0),
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APDS9960_GESTURE_CHANNEL(DOWN, 1),
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APDS9960_GESTURE_CHANNEL(LEFT, 2),
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APDS9960_GESTURE_CHANNEL(RIGHT, 3),
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/* ALS */
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{
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.type = IIO_INTENSITY,
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.info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
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.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE) |
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BIT(IIO_CHAN_INFO_INT_TIME),
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.channel2 = IIO_MOD_LIGHT_CLEAR,
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.address = APDS9960_REG_ALS_CHANNEL(CLEAR),
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.modified = 1,
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.scan_index = -1,
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.event_spec = apds9960_als_event_spec,
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.num_event_specs = ARRAY_SIZE(apds9960_als_event_spec),
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},
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/* RGB Sensor */
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APDS9960_INTENSITY_CHANNEL(RED),
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APDS9960_INTENSITY_CHANNEL(GREEN),
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APDS9960_INTENSITY_CHANNEL(BLUE),
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};
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/* integration time in us */
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static const int apds9960_int_time[][2] = {
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{ 28000, 246},
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{100000, 219},
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{200000, 182},
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{700000, 0}
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};
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/* gain mapping */
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static const int apds9960_pxs_gain_map[] = {1, 2, 4, 8};
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static const int apds9960_als_gain_map[] = {1, 4, 16, 64};
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static IIO_CONST_ATTR(proximity_scale_available, "1 2 4 8");
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static IIO_CONST_ATTR(intensity_scale_available, "1 4 16 64");
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static IIO_CONST_ATTR_INT_TIME_AVAIL("0.028 0.1 0.2 0.7");
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static struct attribute *apds9960_attributes[] = {
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&iio_const_attr_proximity_scale_available.dev_attr.attr,
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&iio_const_attr_intensity_scale_available.dev_attr.attr,
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&iio_const_attr_integration_time_available.dev_attr.attr,
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NULL,
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};
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static const struct attribute_group apds9960_attribute_group = {
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.attrs = apds9960_attributes,
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};
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static const struct reg_field apds9960_reg_field_int_als =
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REG_FIELD(APDS9960_REG_ENABLE, 4, 4);
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static const struct reg_field apds9960_reg_field_int_ges =
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REG_FIELD(APDS9960_REG_GCONF_4, 1, 1);
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static const struct reg_field apds9960_reg_field_int_pxs =
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REG_FIELD(APDS9960_REG_ENABLE, 5, 5);
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static const struct reg_field apds9960_reg_field_enable_als =
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REG_FIELD(APDS9960_REG_ENABLE, 1, 1);
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static const struct reg_field apds9960_reg_field_enable_ges =
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REG_FIELD(APDS9960_REG_ENABLE, 6, 6);
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static const struct reg_field apds9960_reg_field_enable_pxs =
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REG_FIELD(APDS9960_REG_ENABLE, 2, 2);
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static int apds9960_set_it_time(struct apds9960_data *data, int val2)
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{
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int ret = -EINVAL;
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int idx;
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for (idx = 0; idx < ARRAY_SIZE(apds9960_int_time); idx++) {
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if (apds9960_int_time[idx][0] == val2) {
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mutex_lock(&data->lock);
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ret = regmap_write(data->regmap, APDS9960_REG_ATIME,
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apds9960_int_time[idx][1]);
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if (!ret)
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data->als_adc_int_us = val2;
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mutex_unlock(&data->lock);
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break;
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}
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}
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return ret;
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}
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static int apds9960_set_pxs_gain(struct apds9960_data *data, int val)
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{
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int ret = -EINVAL;
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int idx;
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for (idx = 0; idx < ARRAY_SIZE(apds9960_pxs_gain_map); idx++) {
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if (apds9960_pxs_gain_map[idx] == val) {
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/* pxs + gesture gains are mirrored */
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mutex_lock(&data->lock);
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ret = regmap_update_bits(data->regmap,
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APDS9960_REG_CONTROL,
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APDS9960_REG_CONTROL_PGAIN_MASK,
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idx << APDS9960_REG_CONTROL_PGAIN_MASK_SHIFT);
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if (ret) {
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mutex_unlock(&data->lock);
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break;
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}
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ret = regmap_update_bits(data->regmap,
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APDS9960_REG_CONFIG_2,
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APDS9960_REG_CONFIG_2_GGAIN_MASK,
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idx << APDS9960_REG_CONFIG_2_GGAIN_MASK_SHIFT);
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if (!ret)
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data->pxs_gain = idx;
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mutex_unlock(&data->lock);
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break;
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}
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}
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return ret;
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}
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static int apds9960_set_als_gain(struct apds9960_data *data, int val)
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{
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int ret = -EINVAL;
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int idx;
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for (idx = 0; idx < ARRAY_SIZE(apds9960_als_gain_map); idx++) {
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if (apds9960_als_gain_map[idx] == val) {
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mutex_lock(&data->lock);
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ret = regmap_update_bits(data->regmap,
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APDS9960_REG_CONTROL,
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APDS9960_REG_CONTROL_AGAIN_MASK, idx);
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if (!ret)
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data->als_gain = idx;
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mutex_unlock(&data->lock);
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break;
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}
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}
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return ret;
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}
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#ifdef CONFIG_PM
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static int apds9960_set_power_state(struct apds9960_data *data, bool on)
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{
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struct device *dev = &data->client->dev;
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int ret = 0;
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mutex_lock(&data->lock);
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if (on) {
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int suspended;
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suspended = pm_runtime_suspended(dev);
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ret = pm_runtime_get_sync(dev);
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/* Allow one integration cycle before allowing a reading */
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if (suspended)
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usleep_range(data->als_adc_int_us,
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APDS9960_MAX_INT_TIME_IN_US);
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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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mutex_unlock(&data->lock);
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return ret;
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}
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|
#else
|
|
static int apds9960_set_power_state(struct apds9960_data *data, bool on)
|
|
{
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
static int apds9960_read_raw(struct iio_dev *indio_dev,
|
|
struct iio_chan_spec const *chan,
|
|
int *val, int *val2, long mask)
|
|
{
|
|
struct apds9960_data *data = iio_priv(indio_dev);
|
|
__le16 buf;
|
|
int ret = -EINVAL;
|
|
|
|
if (data->gesture_mode_running)
|
|
return -EBUSY;
|
|
|
|
switch (mask) {
|
|
case IIO_CHAN_INFO_RAW:
|
|
apds9960_set_power_state(data, true);
|
|
switch (chan->type) {
|
|
case IIO_PROXIMITY:
|
|
ret = regmap_read(data->regmap, chan->address, val);
|
|
if (!ret)
|
|
ret = IIO_VAL_INT;
|
|
break;
|
|
case IIO_INTENSITY:
|
|
ret = regmap_bulk_read(data->regmap, chan->address,
|
|
&buf, 2);
|
|
if (!ret) {
|
|
ret = IIO_VAL_INT;
|
|
*val = le16_to_cpu(buf);
|
|
}
|
|
break;
|
|
default:
|
|
ret = -EINVAL;
|
|
}
|
|
apds9960_set_power_state(data, false);
|
|
break;
|
|
case IIO_CHAN_INFO_INT_TIME:
|
|
/* RGB + ALS sensors only have integration time */
|
|
mutex_lock(&data->lock);
|
|
switch (chan->type) {
|
|
case IIO_INTENSITY:
|
|
*val = 0;
|
|
*val2 = data->als_adc_int_us;
|
|
ret = IIO_VAL_INT_PLUS_MICRO;
|
|
break;
|
|
default:
|
|
ret = -EINVAL;
|
|
}
|
|
mutex_unlock(&data->lock);
|
|
break;
|
|
case IIO_CHAN_INFO_SCALE:
|
|
mutex_lock(&data->lock);
|
|
switch (chan->type) {
|
|
case IIO_PROXIMITY:
|
|
*val = apds9960_pxs_gain_map[data->pxs_gain];
|
|
ret = IIO_VAL_INT;
|
|
break;
|
|
case IIO_INTENSITY:
|
|
*val = apds9960_als_gain_map[data->als_gain];
|
|
ret = IIO_VAL_INT;
|
|
break;
|
|
default:
|
|
ret = -EINVAL;
|
|
}
|
|
mutex_unlock(&data->lock);
|
|
break;
|
|
}
|
|
|
|
return ret;
|
|
};
|
|
|
|
static int apds9960_write_raw(struct iio_dev *indio_dev,
|
|
struct iio_chan_spec const *chan,
|
|
int val, int val2, long mask)
|
|
{
|
|
struct apds9960_data *data = iio_priv(indio_dev);
|
|
|
|
switch (mask) {
|
|
case IIO_CHAN_INFO_INT_TIME:
|
|
/* RGB + ALS sensors only have int time */
|
|
switch (chan->type) {
|
|
case IIO_INTENSITY:
|
|
if (val != 0)
|
|
return -EINVAL;
|
|
return apds9960_set_it_time(data, val2);
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
case IIO_CHAN_INFO_SCALE:
|
|
if (val2 != 0)
|
|
return -EINVAL;
|
|
switch (chan->type) {
|
|
case IIO_PROXIMITY:
|
|
return apds9960_set_pxs_gain(data, val);
|
|
case IIO_INTENSITY:
|
|
return apds9960_set_als_gain(data, val);
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
default:
|
|
return -EINVAL;
|
|
};
|
|
|
|
return 0;
|
|
}
|
|
|
|
static inline int apds9960_get_thres_reg(const struct iio_chan_spec *chan,
|
|
enum iio_event_direction dir,
|
|
u8 *reg)
|
|
{
|
|
switch (dir) {
|
|
case IIO_EV_DIR_RISING:
|
|
switch (chan->type) {
|
|
case IIO_PROXIMITY:
|
|
*reg = APDS9960_REG_PIHT;
|
|
break;
|
|
case IIO_INTENSITY:
|
|
*reg = APDS9960_REG_AIHTL;
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
break;
|
|
case IIO_EV_DIR_FALLING:
|
|
switch (chan->type) {
|
|
case IIO_PROXIMITY:
|
|
*reg = APDS9960_REG_PILT;
|
|
break;
|
|
case IIO_INTENSITY:
|
|
*reg = APDS9960_REG_AILTL;
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int apds9960_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)
|
|
{
|
|
u8 reg;
|
|
__le16 buf;
|
|
int ret = 0;
|
|
struct apds9960_data *data = iio_priv(indio_dev);
|
|
|
|
if (info != IIO_EV_INFO_VALUE)
|
|
return -EINVAL;
|
|
|
|
ret = apds9960_get_thres_reg(chan, dir, ®);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
if (chan->type == IIO_PROXIMITY) {
|
|
ret = regmap_read(data->regmap, reg, val);
|
|
if (ret < 0)
|
|
return ret;
|
|
} else if (chan->type == IIO_INTENSITY) {
|
|
ret = regmap_bulk_read(data->regmap, reg, &buf, 2);
|
|
if (ret < 0)
|
|
return ret;
|
|
*val = le16_to_cpu(buf);
|
|
} else
|
|
return -EINVAL;
|
|
|
|
*val2 = 0;
|
|
|
|
return IIO_VAL_INT;
|
|
}
|
|
|
|
static int apds9960_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)
|
|
{
|
|
u8 reg;
|
|
__le16 buf;
|
|
int ret = 0;
|
|
struct apds9960_data *data = iio_priv(indio_dev);
|
|
|
|
if (info != IIO_EV_INFO_VALUE)
|
|
return -EINVAL;
|
|
|
|
ret = apds9960_get_thres_reg(chan, dir, ®);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
if (chan->type == IIO_PROXIMITY) {
|
|
if (val < 0 || val > APDS9960_MAX_PXS_THRES_VAL)
|
|
return -EINVAL;
|
|
ret = regmap_write(data->regmap, reg, val);
|
|
if (ret < 0)
|
|
return ret;
|
|
} else if (chan->type == IIO_INTENSITY) {
|
|
if (val < 0 || val > APDS9960_MAX_ALS_THRES_VAL)
|
|
return -EINVAL;
|
|
buf = cpu_to_le16(val);
|
|
ret = regmap_bulk_write(data->regmap, reg, &buf, 2);
|
|
if (ret < 0)
|
|
return ret;
|
|
} else
|
|
return -EINVAL;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int apds9960_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 apds9960_data *data = iio_priv(indio_dev);
|
|
|
|
switch (chan->type) {
|
|
case IIO_PROXIMITY:
|
|
return data->pxs_int;
|
|
case IIO_INTENSITY:
|
|
return data->als_int;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int apds9960_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)
|
|
{
|
|
struct apds9960_data *data = iio_priv(indio_dev);
|
|
int ret;
|
|
|
|
state = !!state;
|
|
|
|
switch (chan->type) {
|
|
case IIO_PROXIMITY:
|
|
if (data->pxs_int == state)
|
|
return -EINVAL;
|
|
|
|
ret = regmap_field_write(data->reg_int_pxs, state);
|
|
if (ret)
|
|
return ret;
|
|
data->pxs_int = state;
|
|
apds9960_set_power_state(data, state);
|
|
break;
|
|
case IIO_INTENSITY:
|
|
if (data->als_int == state)
|
|
return -EINVAL;
|
|
|
|
ret = regmap_field_write(data->reg_int_als, state);
|
|
if (ret)
|
|
return ret;
|
|
data->als_int = state;
|
|
apds9960_set_power_state(data, state);
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct iio_info apds9960_info = {
|
|
.attrs = &apds9960_attribute_group,
|
|
.read_raw = apds9960_read_raw,
|
|
.write_raw = apds9960_write_raw,
|
|
.read_event_value = apds9960_read_event,
|
|
.write_event_value = apds9960_write_event,
|
|
.read_event_config = apds9960_read_event_config,
|
|
.write_event_config = apds9960_write_event_config,
|
|
|
|
};
|
|
|
|
static inline int apds9660_fifo_is_empty(struct apds9960_data *data)
|
|
{
|
|
int cnt;
|
|
int ret;
|
|
|
|
ret = regmap_read(data->regmap, APDS9960_REG_GFLVL, &cnt);
|
|
if (ret)
|
|
return ret;
|
|
|
|
return cnt;
|
|
}
|
|
|
|
static void apds9960_read_gesture_fifo(struct apds9960_data *data)
|
|
{
|
|
int ret, cnt = 0;
|
|
|
|
mutex_lock(&data->lock);
|
|
data->gesture_mode_running = 1;
|
|
|
|
while (cnt || (cnt = apds9660_fifo_is_empty(data) > 0)) {
|
|
ret = regmap_bulk_read(data->regmap, APDS9960_REG_GFIFO_BASE,
|
|
&data->buffer, 4);
|
|
|
|
if (ret)
|
|
goto err_read;
|
|
|
|
iio_push_to_buffers(data->indio_dev, data->buffer);
|
|
cnt--;
|
|
}
|
|
|
|
err_read:
|
|
data->gesture_mode_running = 0;
|
|
mutex_unlock(&data->lock);
|
|
}
|
|
|
|
static irqreturn_t apds9960_interrupt_handler(int irq, void *private)
|
|
{
|
|
struct iio_dev *indio_dev = private;
|
|
struct apds9960_data *data = iio_priv(indio_dev);
|
|
int ret, status;
|
|
|
|
ret = regmap_read(data->regmap, APDS9960_REG_STATUS, &status);
|
|
if (ret < 0) {
|
|
dev_err(&data->client->dev, "irq status reg read failed\n");
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
if ((status & APDS9960_REG_STATUS_ALS_INT) && data->als_int) {
|
|
iio_push_event(indio_dev,
|
|
IIO_UNMOD_EVENT_CODE(IIO_INTENSITY, 0,
|
|
IIO_EV_TYPE_THRESH,
|
|
IIO_EV_DIR_EITHER),
|
|
iio_get_time_ns(indio_dev));
|
|
regmap_write(data->regmap, APDS9960_REG_CICLEAR, 1);
|
|
}
|
|
|
|
if ((status & APDS9960_REG_STATUS_PS_INT) && data->pxs_int) {
|
|
iio_push_event(indio_dev,
|
|
IIO_UNMOD_EVENT_CODE(IIO_PROXIMITY, 0,
|
|
IIO_EV_TYPE_THRESH,
|
|
IIO_EV_DIR_EITHER),
|
|
iio_get_time_ns(indio_dev));
|
|
regmap_write(data->regmap, APDS9960_REG_PICLEAR, 1);
|
|
}
|
|
|
|
if (status & APDS9960_REG_STATUS_GINT)
|
|
apds9960_read_gesture_fifo(data);
|
|
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
static int apds9960_set_powermode(struct apds9960_data *data, bool state)
|
|
{
|
|
return regmap_update_bits(data->regmap, APDS9960_REG_ENABLE, 1, state);
|
|
}
|
|
|
|
static int apds9960_buffer_postenable(struct iio_dev *indio_dev)
|
|
{
|
|
struct apds9960_data *data = iio_priv(indio_dev);
|
|
int ret;
|
|
|
|
ret = regmap_field_write(data->reg_int_ges, 1);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ret = regmap_field_write(data->reg_enable_ges, 1);
|
|
if (ret)
|
|
return ret;
|
|
|
|
pm_runtime_get_sync(&data->client->dev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int apds9960_buffer_predisable(struct iio_dev *indio_dev)
|
|
{
|
|
struct apds9960_data *data = iio_priv(indio_dev);
|
|
int ret;
|
|
|
|
ret = regmap_field_write(data->reg_enable_ges, 0);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ret = regmap_field_write(data->reg_int_ges, 0);
|
|
if (ret)
|
|
return ret;
|
|
|
|
pm_runtime_put_autosuspend(&data->client->dev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct iio_buffer_setup_ops apds9960_buffer_setup_ops = {
|
|
.postenable = apds9960_buffer_postenable,
|
|
.predisable = apds9960_buffer_predisable,
|
|
};
|
|
|
|
static int apds9960_regfield_init(struct apds9960_data *data)
|
|
{
|
|
struct device *dev = &data->client->dev;
|
|
struct regmap *regmap = data->regmap;
|
|
|
|
data->reg_int_als = devm_regmap_field_alloc(dev, regmap,
|
|
apds9960_reg_field_int_als);
|
|
if (IS_ERR(data->reg_int_als)) {
|
|
dev_err(dev, "INT ALS reg field init failed\n");
|
|
return PTR_ERR(data->reg_int_als);
|
|
}
|
|
|
|
data->reg_int_ges = devm_regmap_field_alloc(dev, regmap,
|
|
apds9960_reg_field_int_ges);
|
|
if (IS_ERR(data->reg_int_ges)) {
|
|
dev_err(dev, "INT gesture reg field init failed\n");
|
|
return PTR_ERR(data->reg_int_ges);
|
|
}
|
|
|
|
data->reg_int_pxs = devm_regmap_field_alloc(dev, regmap,
|
|
apds9960_reg_field_int_pxs);
|
|
if (IS_ERR(data->reg_int_pxs)) {
|
|
dev_err(dev, "INT pxs reg field init failed\n");
|
|
return PTR_ERR(data->reg_int_pxs);
|
|
}
|
|
|
|
data->reg_enable_als = devm_regmap_field_alloc(dev, regmap,
|
|
apds9960_reg_field_enable_als);
|
|
if (IS_ERR(data->reg_enable_als)) {
|
|
dev_err(dev, "Enable ALS reg field init failed\n");
|
|
return PTR_ERR(data->reg_enable_als);
|
|
}
|
|
|
|
data->reg_enable_ges = devm_regmap_field_alloc(dev, regmap,
|
|
apds9960_reg_field_enable_ges);
|
|
if (IS_ERR(data->reg_enable_ges)) {
|
|
dev_err(dev, "Enable gesture reg field init failed\n");
|
|
return PTR_ERR(data->reg_enable_ges);
|
|
}
|
|
|
|
data->reg_enable_pxs = devm_regmap_field_alloc(dev, regmap,
|
|
apds9960_reg_field_enable_pxs);
|
|
if (IS_ERR(data->reg_enable_pxs)) {
|
|
dev_err(dev, "Enable PXS reg field init failed\n");
|
|
return PTR_ERR(data->reg_enable_pxs);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int apds9960_chip_init(struct apds9960_data *data)
|
|
{
|
|
int ret;
|
|
|
|
/* Default IT for ALS of 28 ms */
|
|
ret = apds9960_set_it_time(data, 28000);
|
|
if (ret)
|
|
return ret;
|
|
|
|
/* Ensure gesture interrupt is OFF */
|
|
ret = regmap_field_write(data->reg_int_ges, 0);
|
|
if (ret)
|
|
return ret;
|
|
|
|
/* Disable gesture sensor, since polling is useless from user-space */
|
|
ret = regmap_field_write(data->reg_enable_ges, 0);
|
|
if (ret)
|
|
return ret;
|
|
|
|
/* Ensure proximity interrupt is OFF */
|
|
ret = regmap_field_write(data->reg_int_pxs, 0);
|
|
if (ret)
|
|
return ret;
|
|
|
|
/* Enable proximity sensor for polling */
|
|
ret = regmap_field_write(data->reg_enable_pxs, 1);
|
|
if (ret)
|
|
return ret;
|
|
|
|
/* Ensure ALS interrupt is OFF */
|
|
ret = regmap_field_write(data->reg_int_als, 0);
|
|
if (ret)
|
|
return ret;
|
|
|
|
/* Enable ALS sensor for polling */
|
|
ret = regmap_field_write(data->reg_enable_als, 1);
|
|
if (ret)
|
|
return ret;
|
|
/*
|
|
* When enabled trigger an interrupt after 3 readings
|
|
* outside threshold for ALS + PXS
|
|
*/
|
|
ret = regmap_write(data->regmap, APDS9960_REG_PERS,
|
|
APDS9960_DEFAULT_PERS);
|
|
if (ret)
|
|
return ret;
|
|
|
|
/*
|
|
* Wait for 4 event outside gesture threshold to prevent interrupt
|
|
* flooding.
|
|
*/
|
|
ret = regmap_update_bits(data->regmap, APDS9960_REG_GCONF_1,
|
|
APDS9960_REG_GCONF_1_GFIFO_THRES_MASK,
|
|
BIT(0) << APDS9960_REG_GCONF_1_GFIFO_THRES_MASK_SHIFT);
|
|
if (ret)
|
|
return ret;
|
|
|
|
/* Default ENTER and EXIT thresholds for the GESTURE engine. */
|
|
ret = regmap_write(data->regmap, APDS9960_REG_GPENTH,
|
|
APDS9960_DEFAULT_GPENTH);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ret = regmap_write(data->regmap, APDS9960_REG_GEXTH,
|
|
APDS9960_DEFAULT_GEXTH);
|
|
if (ret)
|
|
return ret;
|
|
|
|
return apds9960_set_powermode(data, 1);
|
|
}
|
|
|
|
static int apds9960_probe(struct i2c_client *client,
|
|
const struct i2c_device_id *id)
|
|
{
|
|
struct apds9960_data *data;
|
|
struct iio_buffer *buffer;
|
|
struct iio_dev *indio_dev;
|
|
int ret;
|
|
|
|
indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
|
|
if (!indio_dev)
|
|
return -ENOMEM;
|
|
|
|
buffer = devm_iio_kfifo_allocate(&client->dev);
|
|
if (!buffer)
|
|
return -ENOMEM;
|
|
|
|
iio_device_attach_buffer(indio_dev, buffer);
|
|
|
|
indio_dev->info = &apds9960_info;
|
|
indio_dev->name = APDS9960_DRV_NAME;
|
|
indio_dev->channels = apds9960_channels;
|
|
indio_dev->num_channels = ARRAY_SIZE(apds9960_channels);
|
|
indio_dev->available_scan_masks = apds9960_scan_masks;
|
|
indio_dev->modes = (INDIO_BUFFER_SOFTWARE | INDIO_DIRECT_MODE);
|
|
indio_dev->setup_ops = &apds9960_buffer_setup_ops;
|
|
|
|
data = iio_priv(indio_dev);
|
|
i2c_set_clientdata(client, indio_dev);
|
|
|
|
data->regmap = devm_regmap_init_i2c(client, &apds9960_regmap_config);
|
|
if (IS_ERR(data->regmap)) {
|
|
dev_err(&client->dev, "regmap initialization failed.\n");
|
|
return PTR_ERR(data->regmap);
|
|
}
|
|
|
|
data->client = client;
|
|
data->indio_dev = indio_dev;
|
|
mutex_init(&data->lock);
|
|
|
|
ret = pm_runtime_set_active(&client->dev);
|
|
if (ret)
|
|
goto error_power_down;
|
|
|
|
pm_runtime_enable(&client->dev);
|
|
pm_runtime_set_autosuspend_delay(&client->dev, 5000);
|
|
pm_runtime_use_autosuspend(&client->dev);
|
|
|
|
apds9960_set_power_state(data, true);
|
|
|
|
ret = apds9960_regfield_init(data);
|
|
if (ret)
|
|
goto error_power_down;
|
|
|
|
ret = apds9960_chip_init(data);
|
|
if (ret)
|
|
goto error_power_down;
|
|
|
|
if (client->irq <= 0) {
|
|
dev_err(&client->dev, "no valid irq defined\n");
|
|
ret = -EINVAL;
|
|
goto error_power_down;
|
|
}
|
|
ret = devm_request_threaded_irq(&client->dev, client->irq,
|
|
NULL, apds9960_interrupt_handler,
|
|
IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
|
|
"apds9960_event",
|
|
indio_dev);
|
|
if (ret) {
|
|
dev_err(&client->dev, "request irq (%d) failed\n", client->irq);
|
|
goto error_power_down;
|
|
}
|
|
|
|
ret = iio_device_register(indio_dev);
|
|
if (ret)
|
|
goto error_power_down;
|
|
|
|
apds9960_set_power_state(data, false);
|
|
|
|
return 0;
|
|
|
|
error_power_down:
|
|
apds9960_set_power_state(data, false);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int apds9960_remove(struct i2c_client *client)
|
|
{
|
|
struct iio_dev *indio_dev = i2c_get_clientdata(client);
|
|
struct apds9960_data *data = iio_priv(indio_dev);
|
|
|
|
iio_device_unregister(indio_dev);
|
|
pm_runtime_disable(&client->dev);
|
|
pm_runtime_set_suspended(&client->dev);
|
|
apds9960_set_powermode(data, 0);
|
|
|
|
return 0;
|
|
}
|
|
|
|
#ifdef CONFIG_PM
|
|
static int apds9960_runtime_suspend(struct device *dev)
|
|
{
|
|
struct apds9960_data *data =
|
|
iio_priv(i2c_get_clientdata(to_i2c_client(dev)));
|
|
|
|
return apds9960_set_powermode(data, 0);
|
|
}
|
|
|
|
static int apds9960_runtime_resume(struct device *dev)
|
|
{
|
|
struct apds9960_data *data =
|
|
iio_priv(i2c_get_clientdata(to_i2c_client(dev)));
|
|
|
|
return apds9960_set_powermode(data, 1);
|
|
}
|
|
#endif
|
|
|
|
static const struct dev_pm_ops apds9960_pm_ops = {
|
|
SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
|
|
pm_runtime_force_resume)
|
|
SET_RUNTIME_PM_OPS(apds9960_runtime_suspend,
|
|
apds9960_runtime_resume, NULL)
|
|
};
|
|
|
|
static const struct i2c_device_id apds9960_id[] = {
|
|
{ "apds9960", 0 },
|
|
{}
|
|
};
|
|
MODULE_DEVICE_TABLE(i2c, apds9960_id);
|
|
|
|
static const struct of_device_id apds9960_of_match[] = {
|
|
{ .compatible = "avago,apds9960" },
|
|
{ }
|
|
};
|
|
MODULE_DEVICE_TABLE(of, apds9960_of_match);
|
|
|
|
static struct i2c_driver apds9960_driver = {
|
|
.driver = {
|
|
.name = APDS9960_DRV_NAME,
|
|
.of_match_table = apds9960_of_match,
|
|
.pm = &apds9960_pm_ops,
|
|
},
|
|
.probe = apds9960_probe,
|
|
.remove = apds9960_remove,
|
|
.id_table = apds9960_id,
|
|
};
|
|
module_i2c_driver(apds9960_driver);
|
|
|
|
MODULE_AUTHOR("Matt Ranostay <matt.ranostay@konsulko.com>");
|
|
MODULE_DESCRIPTION("APDS9960 Gesture/RGB/ALS/Proximity sensor");
|
|
MODULE_LICENSE("GPL");
|