// SPDX-License-Identifier: GPL-2.0-only /* * vcnl4000.c - Support for Vishay VCNL4000/4010/4020/4040/4200 combined ambient * light and proximity sensor * * Copyright 2012 Peter Meerwald * Copyright 2019 Pursim SPC * Copyright 2020 Mathieu Othacehe * * IIO driver for: * VCNL4000/10/20 (7-bit I2C slave address 0x13) * VCNL4040 (7-bit I2C slave address 0x60) * VCNL4200 (7-bit I2C slave address 0x51) * * TODO: * allow to adjust IR current * interrupts (VCNL4040, VCNL4200) */ #include #include #include #include #include #include #include #include #include #include #include #include #include #define VCNL4000_DRV_NAME "vcnl4000" #define VCNL4000_PROD_ID 0x01 #define VCNL4010_PROD_ID 0x02 /* for VCNL4020, VCNL4010 */ #define VCNL4040_PROD_ID 0x86 #define VCNL4200_PROD_ID 0x58 #define VCNL4000_COMMAND 0x80 /* Command register */ #define VCNL4000_PROD_REV 0x81 /* Product ID and Revision ID */ #define VCNL4010_PROX_RATE 0x82 /* Proximity rate */ #define VCNL4000_LED_CURRENT 0x83 /* IR LED current for proximity mode */ #define VCNL4000_AL_PARAM 0x84 /* Ambient light parameter register */ #define VCNL4010_ALS_PARAM 0x84 /* ALS rate */ #define VCNL4000_AL_RESULT_HI 0x85 /* Ambient light result register, MSB */ #define VCNL4000_AL_RESULT_LO 0x86 /* Ambient light result register, LSB */ #define VCNL4000_PS_RESULT_HI 0x87 /* Proximity result register, MSB */ #define VCNL4000_PS_RESULT_LO 0x88 /* Proximity result register, LSB */ #define VCNL4000_PS_MEAS_FREQ 0x89 /* Proximity test signal frequency */ #define VCNL4010_INT_CTRL 0x89 /* Interrupt control */ #define VCNL4000_PS_MOD_ADJ 0x8a /* Proximity modulator timing adjustment */ #define VCNL4010_LOW_THR_HI 0x8a /* Low threshold, MSB */ #define VCNL4010_LOW_THR_LO 0x8b /* Low threshold, LSB */ #define VCNL4010_HIGH_THR_HI 0x8c /* High threshold, MSB */ #define VCNL4010_HIGH_THR_LO 0x8d /* High threshold, LSB */ #define VCNL4010_ISR 0x8e /* Interrupt status */ #define VCNL4200_AL_CONF 0x00 /* Ambient light configuration */ #define VCNL4200_PS_CONF1 0x03 /* Proximity configuration */ #define VCNL4200_PS_DATA 0x08 /* Proximity data */ #define VCNL4200_AL_DATA 0x09 /* Ambient light data */ #define VCNL4200_DEV_ID 0x0e /* Device ID, slave address and version */ #define VCNL4040_DEV_ID 0x0c /* Device ID and version */ /* Bit masks for COMMAND register */ #define VCNL4000_AL_RDY BIT(6) /* ALS data ready? */ #define VCNL4000_PS_RDY BIT(5) /* proximity data ready? */ #define VCNL4000_AL_OD BIT(4) /* start on-demand ALS measurement */ #define VCNL4000_PS_OD BIT(3) /* start on-demand proximity measurement */ #define VCNL4000_ALS_EN BIT(2) /* start ALS measurement */ #define VCNL4000_PROX_EN BIT(1) /* start proximity measurement */ #define VCNL4000_SELF_TIMED_EN BIT(0) /* start self-timed measurement */ /* Bit masks for interrupt registers. */ #define VCNL4010_INT_THR_SEL BIT(0) /* Select threshold interrupt source */ #define VCNL4010_INT_THR_EN BIT(1) /* Threshold interrupt type */ #define VCNL4010_INT_ALS_EN BIT(2) /* Enable on ALS data ready */ #define VCNL4010_INT_PROX_EN BIT(3) /* Enable on proximity data ready */ #define VCNL4010_INT_THR_HIGH 0 /* High threshold exceeded */ #define VCNL4010_INT_THR_LOW 1 /* Low threshold exceeded */ #define VCNL4010_INT_ALS 2 /* ALS data ready */ #define VCNL4010_INT_PROXIMITY 3 /* Proximity data ready */ #define VCNL4010_INT_THR \ (BIT(VCNL4010_INT_THR_LOW) | BIT(VCNL4010_INT_THR_HIGH)) #define VCNL4010_INT_DRDY \ (BIT(VCNL4010_INT_PROXIMITY) | BIT(VCNL4010_INT_ALS)) static const int vcnl4010_prox_sampling_frequency[][2] = { {1, 950000}, {3, 906250}, {7, 812500}, {16, 625000}, {31, 250000}, {62, 500000}, {125, 0}, {250, 0}, }; #define VCNL4000_SLEEP_DELAY_MS 2000 /* before we enter pm_runtime_suspend */ enum vcnl4000_device_ids { VCNL4000, VCNL4010, VCNL4040, VCNL4200, }; struct vcnl4200_channel { u8 reg; ktime_t last_measurement; ktime_t sampling_rate; struct mutex lock; }; struct vcnl4000_data { struct i2c_client *client; enum vcnl4000_device_ids id; int rev; int al_scale; const struct vcnl4000_chip_spec *chip_spec; struct mutex vcnl4000_lock; struct vcnl4200_channel vcnl4200_al; struct vcnl4200_channel vcnl4200_ps; uint32_t near_level; }; struct vcnl4000_chip_spec { const char *prod; struct iio_chan_spec const *channels; const int num_channels; const struct iio_info *info; bool irq_support; int (*init)(struct vcnl4000_data *data); int (*measure_light)(struct vcnl4000_data *data, int *val); int (*measure_proximity)(struct vcnl4000_data *data, int *val); int (*set_power_state)(struct vcnl4000_data *data, bool on); }; static const struct i2c_device_id vcnl4000_id[] = { { "vcnl4000", VCNL4000 }, { "vcnl4010", VCNL4010 }, { "vcnl4020", VCNL4010 }, { "vcnl4040", VCNL4040 }, { "vcnl4200", VCNL4200 }, { } }; MODULE_DEVICE_TABLE(i2c, vcnl4000_id); static int vcnl4000_set_power_state(struct vcnl4000_data *data, bool on) { /* no suspend op */ return 0; } static int vcnl4000_init(struct vcnl4000_data *data) { int ret, prod_id; ret = i2c_smbus_read_byte_data(data->client, VCNL4000_PROD_REV); if (ret < 0) return ret; prod_id = ret >> 4; switch (prod_id) { case VCNL4000_PROD_ID: if (data->id != VCNL4000) dev_warn(&data->client->dev, "wrong device id, use vcnl4000"); break; case VCNL4010_PROD_ID: if (data->id != VCNL4010) dev_warn(&data->client->dev, "wrong device id, use vcnl4010/4020"); break; default: return -ENODEV; } data->rev = ret & 0xf; data->al_scale = 250000; mutex_init(&data->vcnl4000_lock); return data->chip_spec->set_power_state(data, true); }; static int vcnl4200_set_power_state(struct vcnl4000_data *data, bool on) { u16 val = on ? 0 /* power on */ : 1 /* shut down */; int ret; ret = i2c_smbus_write_word_data(data->client, VCNL4200_AL_CONF, val); if (ret < 0) return ret; ret = i2c_smbus_write_word_data(data->client, VCNL4200_PS_CONF1, val); if (ret < 0) return ret; if (on) { /* Wait at least one integration cycle before fetching data */ data->vcnl4200_al.last_measurement = ktime_get(); data->vcnl4200_ps.last_measurement = ktime_get(); } return 0; } static int vcnl4200_init(struct vcnl4000_data *data) { int ret, id; ret = i2c_smbus_read_word_data(data->client, VCNL4200_DEV_ID); if (ret < 0) return ret; id = ret & 0xff; if (id != VCNL4200_PROD_ID) { ret = i2c_smbus_read_word_data(data->client, VCNL4040_DEV_ID); if (ret < 0) return ret; id = ret & 0xff; if (id != VCNL4040_PROD_ID) return -ENODEV; } dev_dbg(&data->client->dev, "device id 0x%x", id); data->rev = (ret >> 8) & 0xf; data->vcnl4200_al.reg = VCNL4200_AL_DATA; data->vcnl4200_ps.reg = VCNL4200_PS_DATA; switch (id) { case VCNL4200_PROD_ID: /* Default wait time is 50ms, add 20% tolerance. */ data->vcnl4200_al.sampling_rate = ktime_set(0, 60000 * 1000); /* Default wait time is 4.8ms, add 20% tolerance. */ data->vcnl4200_ps.sampling_rate = ktime_set(0, 5760 * 1000); data->al_scale = 24000; break; case VCNL4040_PROD_ID: /* Default wait time is 80ms, add 20% tolerance. */ data->vcnl4200_al.sampling_rate = ktime_set(0, 96000 * 1000); /* Default wait time is 5ms, add 20% tolerance. */ data->vcnl4200_ps.sampling_rate = ktime_set(0, 6000 * 1000); data->al_scale = 120000; break; } mutex_init(&data->vcnl4200_al.lock); mutex_init(&data->vcnl4200_ps.lock); ret = data->chip_spec->set_power_state(data, true); if (ret < 0) return ret; return 0; }; static int vcnl4000_read_data(struct vcnl4000_data *data, u8 data_reg, int *val) { s32 ret; ret = i2c_smbus_read_word_swapped(data->client, data_reg); if (ret < 0) return ret; *val = ret; return 0; } static int vcnl4000_write_data(struct vcnl4000_data *data, u8 data_reg, int val) { if (val > U16_MAX) return -ERANGE; return i2c_smbus_write_word_swapped(data->client, data_reg, val); } static int vcnl4000_measure(struct vcnl4000_data *data, u8 req_mask, u8 rdy_mask, u8 data_reg, int *val) { int tries = 20; int ret; mutex_lock(&data->vcnl4000_lock); ret = i2c_smbus_write_byte_data(data->client, VCNL4000_COMMAND, req_mask); if (ret < 0) goto fail; /* wait for data to become ready */ while (tries--) { ret = i2c_smbus_read_byte_data(data->client, VCNL4000_COMMAND); if (ret < 0) goto fail; if (ret & rdy_mask) break; msleep(20); /* measurement takes up to 100 ms */ } if (tries < 0) { dev_err(&data->client->dev, "vcnl4000_measure() failed, data not ready\n"); ret = -EIO; goto fail; } ret = vcnl4000_read_data(data, data_reg, val); if (ret < 0) goto fail; mutex_unlock(&data->vcnl4000_lock); return 0; fail: mutex_unlock(&data->vcnl4000_lock); return ret; } static int vcnl4200_measure(struct vcnl4000_data *data, struct vcnl4200_channel *chan, int *val) { int ret; s64 delta; ktime_t next_measurement; mutex_lock(&chan->lock); next_measurement = ktime_add(chan->last_measurement, chan->sampling_rate); delta = ktime_us_delta(next_measurement, ktime_get()); if (delta > 0) usleep_range(delta, delta + 500); chan->last_measurement = ktime_get(); mutex_unlock(&chan->lock); ret = i2c_smbus_read_word_data(data->client, chan->reg); if (ret < 0) return ret; *val = ret; return 0; } static int vcnl4000_measure_light(struct vcnl4000_data *data, int *val) { return vcnl4000_measure(data, VCNL4000_AL_OD, VCNL4000_AL_RDY, VCNL4000_AL_RESULT_HI, val); } static int vcnl4200_measure_light(struct vcnl4000_data *data, int *val) { return vcnl4200_measure(data, &data->vcnl4200_al, val); } static int vcnl4000_measure_proximity(struct vcnl4000_data *data, int *val) { return vcnl4000_measure(data, VCNL4000_PS_OD, VCNL4000_PS_RDY, VCNL4000_PS_RESULT_HI, val); } static int vcnl4200_measure_proximity(struct vcnl4000_data *data, int *val) { return vcnl4200_measure(data, &data->vcnl4200_ps, val); } static int vcnl4010_read_proxy_samp_freq(struct vcnl4000_data *data, int *val, int *val2) { int ret; ret = i2c_smbus_read_byte_data(data->client, VCNL4010_PROX_RATE); if (ret < 0) return ret; if (ret >= ARRAY_SIZE(vcnl4010_prox_sampling_frequency)) return -EINVAL; *val = vcnl4010_prox_sampling_frequency[ret][0]; *val2 = vcnl4010_prox_sampling_frequency[ret][1]; return 0; } static bool vcnl4010_is_in_periodic_mode(struct vcnl4000_data *data) { int ret; ret = i2c_smbus_read_byte_data(data->client, VCNL4000_COMMAND); if (ret < 0) return false; return !!(ret & VCNL4000_SELF_TIMED_EN); } static int vcnl4000_set_pm_runtime_state(struct vcnl4000_data *data, bool on) { struct device *dev = &data->client->dev; int ret; if (on) { ret = pm_runtime_get_sync(dev); if (ret < 0) pm_runtime_put_noidle(dev); } else { pm_runtime_mark_last_busy(dev); ret = pm_runtime_put_autosuspend(dev); } return ret; } static int vcnl4000_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: ret = vcnl4000_set_pm_runtime_state(data, true); if (ret < 0) return ret; switch (chan->type) { case IIO_LIGHT: ret = data->chip_spec->measure_light(data, val); if (!ret) ret = IIO_VAL_INT; break; case IIO_PROXIMITY: ret = data->chip_spec->measure_proximity(data, val); if (!ret) ret = IIO_VAL_INT; break; default: ret = -EINVAL; } vcnl4000_set_pm_runtime_state(data, false); return ret; case IIO_CHAN_INFO_SCALE: if (chan->type != IIO_LIGHT) return -EINVAL; *val = 0; *val2 = data->al_scale; return IIO_VAL_INT_PLUS_MICRO; default: return -EINVAL; } } 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] __aligned(8) = {0}; /* 1x16-bit + naturally aligned 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->dev.parent = &client->dev; 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 "); MODULE_AUTHOR("Mathieu Othacehe "); MODULE_DESCRIPTION("Vishay VCNL4000 proximity/ambient light sensor driver"); MODULE_LICENSE("GPL");