linux/drivers/iio/adc/dln2-adc.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * Driver for the Diolan DLN-2 USB-ADC adapter
 *
 * Copyright (c) 2017 Jack Andersen
 */

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/types.h>
#include <linux/platform_device.h>
#include <linux/mfd/dln2.h>

#include <linux/iio/iio.h>
#include <linux/iio/sysfs.h>
#include <linux/iio/trigger.h>
#include <linux/iio/trigger_consumer.h>
#include <linux/iio/triggered_buffer.h>
#include <linux/iio/buffer.h>
#include <linux/iio/kfifo_buf.h>

#define DLN2_ADC_MOD_NAME …

#define DLN2_ADC_ID …

#define DLN2_ADC_GET_CHANNEL_COUNT …
#define DLN2_ADC_ENABLE …
#define DLN2_ADC_DISABLE …
#define DLN2_ADC_CHANNEL_ENABLE …
#define DLN2_ADC_CHANNEL_DISABLE …
#define DLN2_ADC_SET_RESOLUTION …
#define DLN2_ADC_CHANNEL_GET_VAL …
#define DLN2_ADC_CHANNEL_GET_ALL_VAL …
#define DLN2_ADC_CHANNEL_SET_CFG …
#define DLN2_ADC_CHANNEL_GET_CFG …
#define DLN2_ADC_CONDITION_MET_EV …

#define DLN2_ADC_EVENT_NONE …
#define DLN2_ADC_EVENT_BELOW …
#define DLN2_ADC_EVENT_LEVEL_ABOVE …
#define DLN2_ADC_EVENT_OUTSIDE …
#define DLN2_ADC_EVENT_INSIDE …
#define DLN2_ADC_EVENT_ALWAYS …

#define DLN2_ADC_MAX_CHANNELS …
#define DLN2_ADC_DATA_BITS …

/*
 * Plays similar role to iio_demux_table in subsystem core; except allocated
 * in a fixed 8-element array.
 */
struct dln2_adc_demux_table { … };

struct dln2_adc { … };

struct dln2_adc_port_chan { … };

struct dln2_adc_get_all_vals { … };

static void dln2_adc_add_demux(struct dln2_adc *dln2,
	unsigned int in_loc, unsigned int out_loc,
	unsigned int length)
{ … }

static void dln2_adc_update_demux(struct dln2_adc *dln2)
{ … }

static int dln2_adc_get_chan_count(struct dln2_adc *dln2)
{ … }

static int dln2_adc_set_port_resolution(struct dln2_adc *dln2)
{ … }

static int dln2_adc_set_chan_enabled(struct dln2_adc *dln2,
				     int channel, bool enable)
{ … }

static int dln2_adc_set_port_enabled(struct dln2_adc *dln2, bool enable,
				     u16 *conflict_out)
{ … }

static int dln2_adc_set_chan_period(struct dln2_adc *dln2,
	unsigned int channel, unsigned int period)
{ … }

static int dln2_adc_read(struct dln2_adc *dln2, unsigned int channel)
{ … }

static int dln2_adc_read_all(struct dln2_adc *dln2,
			     struct dln2_adc_get_all_vals *get_all_vals)
{ … }

static int dln2_adc_read_raw(struct iio_dev *indio_dev,
			     struct iio_chan_spec const *chan,
			     int *val,
			     int *val2,
			     long mask)
{ … }

static int dln2_adc_write_raw(struct iio_dev *indio_dev,
			      struct iio_chan_spec const *chan,
			      int val,
			      int val2,
			      long mask)
{ … }

static int dln2_update_scan_mode(struct iio_dev *indio_dev,
				 const unsigned long *scan_mask)
{ … }

#define DLN2_ADC_CHAN(lval, idx) …

/* Assignment version of IIO_CHAN_SOFT_TIMESTAMP */
#define IIO_CHAN_SOFT_TIMESTAMP_ASSIGN(lval, _si) …

static const struct iio_info dln2_adc_info = …;

static irqreturn_t dln2_adc_trigger_h(int irq, void *p)
{ … }

static int dln2_adc_triggered_buffer_postenable(struct iio_dev *indio_dev)
{ … }

static int dln2_adc_triggered_buffer_predisable(struct iio_dev *indio_dev)
{ … }

static const struct iio_buffer_setup_ops dln2_adc_buffer_setup_ops = …;

static void dln2_adc_event(struct platform_device *pdev, u16 echo,
			   const void *data, int len)
{ … }

static int dln2_adc_probe(struct platform_device *pdev)
{ … }

static void dln2_adc_remove(struct platform_device *pdev)
{ … }

static struct platform_driver dln2_adc_driver = …;

module_platform_driver(…) …;

MODULE_AUTHOR(…) …;
MODULE_DESCRIPTION(…) …;
MODULE_LICENSE(…) …;
MODULE_ALIAS(…) …;