diff options
Diffstat (limited to 'drivers/staging/iio/cdc/ad7150.c')
| -rw-r--r-- | drivers/staging/iio/cdc/ad7150.c | 655 |
1 files changed, 0 insertions, 655 deletions
diff --git a/drivers/staging/iio/cdc/ad7150.c b/drivers/staging/iio/cdc/ad7150.c deleted file mode 100644 index 48132ab157ef..000000000000 --- a/drivers/staging/iio/cdc/ad7150.c +++ /dev/null @@ -1,655 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0+ -/* - * AD7150 capacitive sensor driver supporting AD7150/1/6 - * - * Copyright 2010-2011 Analog Devices Inc. - */ - -#include <linux/bitfield.h> -#include <linux/interrupt.h> -#include <linux/device.h> -#include <linux/kernel.h> -#include <linux/slab.h> -#include <linux/i2c.h> -#include <linux/module.h> - -#include <linux/iio/iio.h> -#include <linux/iio/sysfs.h> -#include <linux/iio/events.h> -/* - * AD7150 registers definition - */ - -#define AD7150_STATUS 0 -#define AD7150_STATUS_OUT1 BIT(3) -#define AD7150_STATUS_OUT2 BIT(5) -#define AD7150_CH1_DATA_HIGH 1 -#define AD7150_CH2_DATA_HIGH 3 -#define AD7150_CH1_AVG_HIGH 5 -#define AD7150_CH2_AVG_HIGH 7 -#define AD7150_CH1_SENSITIVITY 9 -#define AD7150_CH1_THR_HOLD_H 9 -#define AD7150_CH1_TIMEOUT 10 -#define AD7150_CH1_SETUP 11 -#define AD7150_CH2_SENSITIVITY 12 -#define AD7150_CH2_THR_HOLD_H 12 -#define AD7150_CH2_TIMEOUT 13 -#define AD7150_CH2_SETUP 14 -#define AD7150_CFG 15 -#define AD7150_CFG_FIX BIT(7) -#define AD7150_PD_TIMER 16 -#define AD7150_CH1_CAPDAC 17 -#define AD7150_CH2_CAPDAC 18 -#define AD7150_SN3 19 -#define AD7150_SN2 20 -#define AD7150_SN1 21 -#define AD7150_SN0 22 -#define AD7150_ID 23 - -/* AD7150 masks */ -#define AD7150_THRESHTYPE_MSK GENMASK(6, 5) - -/** - * struct ad7150_chip_info - instance specific chip data - * @client: i2c client for this device - * @current_event: device always has one type of event enabled. - * This element stores the event code of the current one. - * @threshold: thresholds for simple capacitance value events - * @thresh_sensitivity: threshold for simple capacitance offset - * from 'average' value. - * @mag_sensitity: threshold for magnitude of capacitance offset from - * from 'average' value. - * @thresh_timeout: a timeout, in samples from the moment an - * adaptive threshold event occurs to when the average - * value jumps to current value. - * @mag_timeout: a timeout, in sample from the moment an - * adaptive magnitude event occurs to when the average - * value jumps to the current value. - * @old_state: store state from previous event, allowing confirmation - * of new condition. - * @conversion_mode: the current conversion mode. - * @state_lock: ensure consistent state of this structure wrt the - * hardware. - */ -struct ad7150_chip_info { - struct i2c_client *client; - u64 current_event; - u16 threshold[2][2]; - u8 thresh_sensitivity[2][2]; - u8 mag_sensitivity[2][2]; - u8 thresh_timeout[2][2]; - u8 mag_timeout[2][2]; - int old_state; - char *conversion_mode; - struct mutex state_lock; -}; - -/* - * sysfs nodes - */ - -static const u8 ad7150_addresses[][6] = { - { AD7150_CH1_DATA_HIGH, AD7150_CH1_AVG_HIGH, - AD7150_CH1_SETUP, AD7150_CH1_THR_HOLD_H, - AD7150_CH1_SENSITIVITY, AD7150_CH1_TIMEOUT }, - { AD7150_CH2_DATA_HIGH, AD7150_CH2_AVG_HIGH, - AD7150_CH2_SETUP, AD7150_CH2_THR_HOLD_H, - AD7150_CH2_SENSITIVITY, AD7150_CH2_TIMEOUT }, -}; - -static int ad7150_read_raw(struct iio_dev *indio_dev, - struct iio_chan_spec const *chan, - int *val, - int *val2, - long mask) -{ - int ret; - struct ad7150_chip_info *chip = iio_priv(indio_dev); - int channel = chan->channel; - - switch (mask) { - case IIO_CHAN_INFO_RAW: - ret = i2c_smbus_read_word_data(chip->client, - ad7150_addresses[channel][0]); - if (ret < 0) - return ret; - *val = swab16(ret); - return IIO_VAL_INT; - case IIO_CHAN_INFO_AVERAGE_RAW: - ret = i2c_smbus_read_word_data(chip->client, - ad7150_addresses[channel][1]); - if (ret < 0) - return ret; - *val = swab16(ret); - return IIO_VAL_INT; - default: - return -EINVAL; - } -} - -static int ad7150_read_event_config(struct iio_dev *indio_dev, - const struct iio_chan_spec *chan, - enum iio_event_type type, - enum iio_event_direction dir) -{ - int ret; - u8 threshtype; - bool thrfixed; - struct ad7150_chip_info *chip = iio_priv(indio_dev); - - ret = i2c_smbus_read_byte_data(chip->client, AD7150_CFG); - if (ret < 0) - return ret; - - threshtype = FIELD_GET(AD7150_THRESHTYPE_MSK, ret); - - /*check if threshold mode is fixed or adaptive*/ - thrfixed = FIELD_GET(AD7150_CFG_FIX, ret); - - switch (type) { - case IIO_EV_TYPE_MAG_ADAPTIVE: - if (dir == IIO_EV_DIR_RISING) - return !thrfixed && (threshtype == 0x1); - return !thrfixed && (threshtype == 0x0); - case IIO_EV_TYPE_THRESH_ADAPTIVE: - if (dir == IIO_EV_DIR_RISING) - return !thrfixed && (threshtype == 0x3); - return !thrfixed && (threshtype == 0x2); - case IIO_EV_TYPE_THRESH: - if (dir == IIO_EV_DIR_RISING) - return thrfixed && (threshtype == 0x1); - return thrfixed && (threshtype == 0x0); - default: - break; - } - return -EINVAL; -} - -/* state_lock should be held to ensure consistent state*/ - -static int ad7150_write_event_params(struct iio_dev *indio_dev, - unsigned int chan, - enum iio_event_type type, - enum iio_event_direction dir) -{ - int ret; - u16 value; - u8 sens, timeout; - struct ad7150_chip_info *chip = iio_priv(indio_dev); - int rising = (dir == IIO_EV_DIR_RISING); - u64 event_code; - - event_code = IIO_UNMOD_EVENT_CODE(IIO_CAPACITANCE, chan, type, dir); - - if (event_code != chip->current_event) - return 0; - - switch (type) { - /* Note completely different from the adaptive versions */ - case IIO_EV_TYPE_THRESH: - value = chip->threshold[rising][chan]; - return i2c_smbus_write_word_data(chip->client, - ad7150_addresses[chan][3], - swab16(value)); - case IIO_EV_TYPE_MAG_ADAPTIVE: - sens = chip->mag_sensitivity[rising][chan]; - timeout = chip->mag_timeout[rising][chan]; - break; - case IIO_EV_TYPE_THRESH_ADAPTIVE: - sens = chip->thresh_sensitivity[rising][chan]; - timeout = chip->thresh_timeout[rising][chan]; - break; - default: - return -EINVAL; - } - ret = i2c_smbus_write_byte_data(chip->client, - ad7150_addresses[chan][4], - sens); - if (ret) - return ret; - return i2c_smbus_write_byte_data(chip->client, - ad7150_addresses[chan][5], - timeout); -} - -static int ad7150_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) -{ - u8 thresh_type, cfg, adaptive; - int ret; - struct ad7150_chip_info *chip = iio_priv(indio_dev); - int rising = (dir == IIO_EV_DIR_RISING); - u64 event_code; - - /* Something must always be turned on */ - if (!state) - return -EINVAL; - - event_code = IIO_UNMOD_EVENT_CODE(chan->type, chan->channel, type, dir); - if (event_code == chip->current_event) - return 0; - mutex_lock(&chip->state_lock); - ret = i2c_smbus_read_byte_data(chip->client, AD7150_CFG); - if (ret < 0) - goto error_ret; - - cfg = ret & ~((0x03 << 5) | BIT(7)); - - switch (type) { - case IIO_EV_TYPE_MAG_ADAPTIVE: - adaptive = 1; - if (rising) - thresh_type = 0x1; - else - thresh_type = 0x0; - break; - case IIO_EV_TYPE_THRESH_ADAPTIVE: - adaptive = 1; - if (rising) - thresh_type = 0x3; - else - thresh_type = 0x2; - break; - case IIO_EV_TYPE_THRESH: - adaptive = 0; - if (rising) - thresh_type = 0x1; - else - thresh_type = 0x0; - break; - default: - ret = -EINVAL; - goto error_ret; - } - - cfg |= (!adaptive << 7) | (thresh_type << 5); - - ret = i2c_smbus_write_byte_data(chip->client, AD7150_CFG, cfg); - if (ret < 0) - goto error_ret; - - chip->current_event = event_code; - - /* update control attributes */ - ret = ad7150_write_event_params(indio_dev, chan->channel, type, dir); -error_ret: - mutex_unlock(&chip->state_lock); - - return ret; -} - -static int ad7150_read_event_value(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) -{ - struct ad7150_chip_info *chip = iio_priv(indio_dev); - int rising = (dir == IIO_EV_DIR_RISING); - - /* Complex register sharing going on here */ - switch (type) { - case IIO_EV_TYPE_MAG_ADAPTIVE: - *val = chip->mag_sensitivity[rising][chan->channel]; - return IIO_VAL_INT; - case IIO_EV_TYPE_THRESH_ADAPTIVE: - *val = chip->thresh_sensitivity[rising][chan->channel]; - return IIO_VAL_INT; - case IIO_EV_TYPE_THRESH: - *val = chip->threshold[rising][chan->channel]; - return IIO_VAL_INT; - default: - return -EINVAL; - } -} - -static int ad7150_write_event_value(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 ad7150_chip_info *chip = iio_priv(indio_dev); - int rising = (dir == IIO_EV_DIR_RISING); - - mutex_lock(&chip->state_lock); - switch (type) { - case IIO_EV_TYPE_MAG_ADAPTIVE: - chip->mag_sensitivity[rising][chan->channel] = val; - break; - case IIO_EV_TYPE_THRESH_ADAPTIVE: - chip->thresh_sensitivity[rising][chan->channel] = val; - break; - case IIO_EV_TYPE_THRESH: - chip->threshold[rising][chan->channel] = val; - break; - default: - ret = -EINVAL; - goto error_ret; - } - - /* write back if active */ - ret = ad7150_write_event_params(indio_dev, chan->channel, type, dir); - -error_ret: - mutex_unlock(&chip->state_lock); - return ret; -} - -static ssize_t ad7150_show_timeout(struct device *dev, - struct device_attribute *attr, - char *buf) -{ - struct iio_dev *indio_dev = dev_to_iio_dev(dev); - struct ad7150_chip_info *chip = iio_priv(indio_dev); - struct iio_dev_attr *this_attr = to_iio_dev_attr(attr); - u8 value; - - /* use the event code for consistency reasons */ - int chan = IIO_EVENT_CODE_EXTRACT_CHAN(this_attr->address); - int rising = (IIO_EVENT_CODE_EXTRACT_DIR(this_attr->address) - == IIO_EV_DIR_RISING) ? 1 : 0; - - switch (IIO_EVENT_CODE_EXTRACT_TYPE(this_attr->address)) { - case IIO_EV_TYPE_MAG_ADAPTIVE: - value = chip->mag_timeout[rising][chan]; - break; - case IIO_EV_TYPE_THRESH_ADAPTIVE: - value = chip->thresh_timeout[rising][chan]; - break; - default: - return -EINVAL; - } - - return sprintf(buf, "%d\n", value); -} - -static ssize_t ad7150_store_timeout(struct device *dev, - struct device_attribute *attr, - const char *buf, - size_t len) -{ - struct iio_dev *indio_dev = dev_to_iio_dev(dev); - struct ad7150_chip_info *chip = iio_priv(indio_dev); - struct iio_dev_attr *this_attr = to_iio_dev_attr(attr); - int chan = IIO_EVENT_CODE_EXTRACT_CHAN(this_attr->address); - enum iio_event_direction dir; - enum iio_event_type type; - int rising; - u8 data; - int ret; - - type = IIO_EVENT_CODE_EXTRACT_TYPE(this_attr->address); - dir = IIO_EVENT_CODE_EXTRACT_DIR(this_attr->address); - rising = (dir == IIO_EV_DIR_RISING); - - ret = kstrtou8(buf, 10, &data); - if (ret < 0) - return ret; - - mutex_lock(&chip->state_lock); - switch (type) { - case IIO_EV_TYPE_MAG_ADAPTIVE: - chip->mag_timeout[rising][chan] = data; - break; - case IIO_EV_TYPE_THRESH_ADAPTIVE: - chip->thresh_timeout[rising][chan] = data; - break; - default: - ret = -EINVAL; - goto error_ret; - } - - ret = ad7150_write_event_params(indio_dev, chan, type, dir); -error_ret: - mutex_unlock(&chip->state_lock); - - if (ret < 0) - return ret; - - return len; -} - -#define AD7150_TIMEOUT(chan, type, dir, ev_type, ev_dir) \ - IIO_DEVICE_ATTR(in_capacitance##chan##_##type##_##dir##_timeout, \ - 0644, \ - &ad7150_show_timeout, \ - &ad7150_store_timeout, \ - IIO_UNMOD_EVENT_CODE(IIO_CAPACITANCE, \ - chan, \ - IIO_EV_TYPE_##ev_type, \ - IIO_EV_DIR_##ev_dir)) -static AD7150_TIMEOUT(0, mag_adaptive, rising, MAG_ADAPTIVE, RISING); -static AD7150_TIMEOUT(0, mag_adaptive, falling, MAG_ADAPTIVE, FALLING); -static AD7150_TIMEOUT(1, mag_adaptive, rising, MAG_ADAPTIVE, RISING); -static AD7150_TIMEOUT(1, mag_adaptive, falling, MAG_ADAPTIVE, FALLING); -static AD7150_TIMEOUT(0, thresh_adaptive, rising, THRESH_ADAPTIVE, RISING); -static AD7150_TIMEOUT(0, thresh_adaptive, falling, THRESH_ADAPTIVE, FALLING); -static AD7150_TIMEOUT(1, thresh_adaptive, rising, THRESH_ADAPTIVE, RISING); -static AD7150_TIMEOUT(1, thresh_adaptive, falling, THRESH_ADAPTIVE, FALLING); - -static const struct iio_event_spec ad7150_events[] = { - { - .type = IIO_EV_TYPE_THRESH, - .dir = IIO_EV_DIR_RISING, - .mask_separate = BIT(IIO_EV_INFO_VALUE) | - BIT(IIO_EV_INFO_ENABLE), - }, { - .type = IIO_EV_TYPE_THRESH, - .dir = IIO_EV_DIR_FALLING, - .mask_separate = BIT(IIO_EV_INFO_VALUE) | - BIT(IIO_EV_INFO_ENABLE), - }, { - .type = IIO_EV_TYPE_THRESH_ADAPTIVE, - .dir = IIO_EV_DIR_RISING, - .mask_separate = BIT(IIO_EV_INFO_VALUE) | - BIT(IIO_EV_INFO_ENABLE), - }, { - .type = IIO_EV_TYPE_THRESH_ADAPTIVE, - .dir = IIO_EV_DIR_FALLING, - .mask_separate = BIT(IIO_EV_INFO_VALUE) | - BIT(IIO_EV_INFO_ENABLE), - }, { - .type = IIO_EV_TYPE_MAG_ADAPTIVE, - .dir = IIO_EV_DIR_RISING, - .mask_separate = BIT(IIO_EV_INFO_VALUE) | - BIT(IIO_EV_INFO_ENABLE), - }, { - .type = IIO_EV_TYPE_MAG_ADAPTIVE, - .dir = IIO_EV_DIR_FALLING, - .mask_separate = BIT(IIO_EV_INFO_VALUE) | - BIT(IIO_EV_INFO_ENABLE), - }, -}; - -#define AD7150_CAPACITANCE_CHAN(_chan) { \ - .type = IIO_CAPACITANCE, \ - .indexed = 1, \ - .channel = _chan, \ - .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | \ - BIT(IIO_CHAN_INFO_AVERAGE_RAW), \ - .event_spec = ad7150_events, \ - .num_event_specs = ARRAY_SIZE(ad7150_events), \ - } - -static const struct iio_chan_spec ad7150_channels[] = { - AD7150_CAPACITANCE_CHAN(0), - AD7150_CAPACITANCE_CHAN(1) -}; - -static irqreturn_t ad7150_event_handler(int irq, void *private) -{ - struct iio_dev *indio_dev = private; - struct ad7150_chip_info *chip = iio_priv(indio_dev); - u8 int_status; - s64 timestamp = iio_get_time_ns(indio_dev); - int ret; - - ret = i2c_smbus_read_byte_data(chip->client, AD7150_STATUS); - if (ret < 0) - return IRQ_HANDLED; - - int_status = ret; - - if ((int_status & AD7150_STATUS_OUT1) && - !(chip->old_state & AD7150_STATUS_OUT1)) - iio_push_event(indio_dev, - IIO_UNMOD_EVENT_CODE(IIO_CAPACITANCE, - 0, - IIO_EV_TYPE_THRESH, - IIO_EV_DIR_RISING), - timestamp); - else if ((!(int_status & AD7150_STATUS_OUT1)) && - (chip->old_state & AD7150_STATUS_OUT1)) - iio_push_event(indio_dev, - IIO_UNMOD_EVENT_CODE(IIO_CAPACITANCE, - 0, - IIO_EV_TYPE_THRESH, - IIO_EV_DIR_FALLING), - timestamp); - - if ((int_status & AD7150_STATUS_OUT2) && - !(chip->old_state & AD7150_STATUS_OUT2)) - iio_push_event(indio_dev, - IIO_UNMOD_EVENT_CODE(IIO_CAPACITANCE, - 1, - IIO_EV_TYPE_THRESH, - IIO_EV_DIR_RISING), - timestamp); - else if ((!(int_status & AD7150_STATUS_OUT2)) && - (chip->old_state & AD7150_STATUS_OUT2)) - iio_push_event(indio_dev, - IIO_UNMOD_EVENT_CODE(IIO_CAPACITANCE, - 1, - IIO_EV_TYPE_THRESH, - IIO_EV_DIR_FALLING), - timestamp); - /* store the status to avoid repushing same events */ - chip->old_state = int_status; - - return IRQ_HANDLED; -} - -/* Timeouts not currently handled by core */ -static struct attribute *ad7150_event_attributes[] = { - &iio_dev_attr_in_capacitance0_mag_adaptive_rising_timeout - .dev_attr.attr, - &iio_dev_attr_in_capacitance0_mag_adaptive_falling_timeout - .dev_attr.attr, - &iio_dev_attr_in_capacitance1_mag_adaptive_rising_timeout - .dev_attr.attr, - &iio_dev_attr_in_capacitance1_mag_adaptive_falling_timeout - .dev_attr.attr, - &iio_dev_attr_in_capacitance0_thresh_adaptive_rising_timeout - .dev_attr.attr, - &iio_dev_attr_in_capacitance0_thresh_adaptive_falling_timeout - .dev_attr.attr, - &iio_dev_attr_in_capacitance1_thresh_adaptive_rising_timeout - .dev_attr.attr, - &iio_dev_attr_in_capacitance1_thresh_adaptive_falling_timeout - .dev_attr.attr, - NULL, -}; - -static const struct attribute_group ad7150_event_attribute_group = { - .attrs = ad7150_event_attributes, - .name = "events", -}; - -static const struct iio_info ad7150_info = { - .event_attrs = &ad7150_event_attribute_group, - .read_raw = &ad7150_read_raw, - .read_event_config = &ad7150_read_event_config, - .write_event_config = &ad7150_write_event_config, - .read_event_value = &ad7150_read_event_value, - .write_event_value = &ad7150_write_event_value, -}; - -static int ad7150_probe(struct i2c_client *client, - const struct i2c_device_id *id) -{ - int ret; - struct ad7150_chip_info *chip; - struct iio_dev *indio_dev; - - indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*chip)); - if (!indio_dev) - return -ENOMEM; - chip = iio_priv(indio_dev); - mutex_init(&chip->state_lock); - /* this is only used for device removal purposes */ - i2c_set_clientdata(client, indio_dev); - - chip->client = client; - - indio_dev->name = id->name; - indio_dev->channels = ad7150_channels; - indio_dev->num_channels = ARRAY_SIZE(ad7150_channels); - - indio_dev->info = &ad7150_info; - - indio_dev->modes = INDIO_DIRECT_MODE; - - if (client->irq) { - ret = devm_request_threaded_irq(&client->dev, client->irq, - NULL, - &ad7150_event_handler, - IRQF_TRIGGER_RISING | - IRQF_TRIGGER_FALLING | - IRQF_ONESHOT, - "ad7150_irq1", - indio_dev); - if (ret) - return ret; - } - - if (client->dev.platform_data) { - ret = devm_request_threaded_irq(&client->dev, *(unsigned int *) - client->dev.platform_data, - NULL, - &ad7150_event_handler, - IRQF_TRIGGER_RISING | - IRQF_TRIGGER_FALLING | - IRQF_ONESHOT, - "ad7150_irq2", - indio_dev); - if (ret) - return ret; - } - - ret = devm_iio_device_register(indio_dev->dev.parent, indio_dev); - if (ret) - return ret; - - dev_info(&client->dev, "%s capacitive sensor registered,irq: %d\n", - id->name, client->irq); - - return 0; -} - -static const struct i2c_device_id ad7150_id[] = { - { "ad7150", 0 }, - { "ad7151", 0 }, - { "ad7156", 0 }, - {} -}; - -MODULE_DEVICE_TABLE(i2c, ad7150_id); - -static struct i2c_driver ad7150_driver = { - .driver = { - .name = "ad7150", - }, - .probe = ad7150_probe, - .id_table = ad7150_id, -}; -module_i2c_driver(ad7150_driver); - -MODULE_AUTHOR("Barry Song <21cnbao@gmail.com>"); -MODULE_DESCRIPTION("Analog Devices AD7150/1/6 capacitive sensor driver"); -MODULE_LICENSE("GPL v2"); |