/* SPDX-License-Identifier: GPL-2.0-only */
/**
 * Copyright (c) 2011 Jonathan Cameron
 *
 * Join together the various functionality of iio_simple_dummy driver
 */

#ifndef _IIO_SIMPLE_DUMMY_H_
#define _IIO_SIMPLE_DUMMY_H_
#include <linux/kernel.h>

struct iio_dummy_accel_calibscale;
struct iio_dummy_regs;

/**
 * struct iio_dummy_state - device instance specific state.
 * @dac_val:                    cache for dac value
 * @single_ended_adc_val:       cache for single ended adc value
 * @differential_adc_val:       cache for differential adc value
 * @accel_val:                  cache for acceleration value
 * @accel_calibbias:            cache for acceleration calibbias
 * @accel_calibscale:           cache for acceleration calibscale
 * @lock:                       lock to ensure state is consistent
 * @event_irq:                  irq number for event line (faked)
 * @event_val:                  cache for event threshold value
 * @event_en:                   cache of whether event is enabled
 */
struct iio_dummy_state {
        int dac_val;
        int single_ended_adc_val;
        int differential_adc_val[2];
        int accel_val;
        int accel_calibbias;
        int activity_running;
        int activity_walking;
        const struct iio_dummy_accel_calibscale *accel_calibscale;
        struct mutex lock;
        struct iio_dummy_regs *regs;
        int steps_enabled;
        int steps;
        int height;
#ifdef CONFIG_IIO_SIMPLE_DUMMY_EVENTS
        int event_irq;
        int event_val;
        bool event_en;
        s64 event_timestamp;
#endif /* CONFIG_IIO_SIMPLE_DUMMY_EVENTS */
};

#ifdef CONFIG_IIO_SIMPLE_DUMMY_EVENTS

struct iio_dev;

int iio_simple_dummy_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 iio_simple_dummy_write_event_config(struct iio_dev *indio_dev,
                                        const struct iio_chan_spec *chan,
                                        enum iio_event_type type,
                                        enum iio_event_direction dir,
                                        bool state);

int iio_simple_dummy_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);

int iio_simple_dummy_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 iio_simple_dummy_events_register(struct iio_dev *indio_dev);
void iio_simple_dummy_events_unregister(struct iio_dev *indio_dev);

#else /* Stubs for when events are disabled at compile time */

static inline int
iio_simple_dummy_events_register(struct iio_dev *indio_dev)
{
        return 0;
}

static inline void
iio_simple_dummy_events_unregister(struct iio_dev *indio_dev)
{}

#endif /* CONFIG_IIO_SIMPLE_DUMMY_EVENTS*/

/**
 * enum iio_simple_dummy_scan_elements - scan index enum
 * @DUMMY_INDEX_VOLTAGE_0:         the single ended voltage channel
 * @DUMMY_INDEX_DIFFVOLTAGE_1M2:   first differential channel
 * @DUMMY_INDEX_DIFFVOLTAGE_3M4:   second differential channel
 * @DUMMY_INDEX_ACCELX:            acceleration channel
 *
 * Enum provides convenient numbering for the scan index.
 */
enum iio_simple_dummy_scan_elements {
        DUMMY_INDEX_VOLTAGE_0,
        DUMMY_INDEX_DIFFVOLTAGE_1M2,
        DUMMY_INDEX_DIFFVOLTAGE_3M4,
        DUMMY_INDEX_ACCELX,
};

#ifdef CONFIG_IIO_SIMPLE_DUMMY_BUFFER
int iio_simple_dummy_configure_buffer(struct iio_dev *indio_dev);
void iio_simple_dummy_unconfigure_buffer(struct iio_dev *indio_dev);
#else
static inline int iio_simple_dummy_configure_buffer(struct iio_dev *indio_dev)
{
        return 0;
}

static inline
void iio_simple_dummy_unconfigure_buffer(struct iio_dev *indio_dev)
{}

#endif /* CONFIG_IIO_SIMPLE_DUMMY_BUFFER */
#endif /* _IIO_SIMPLE_DUMMY_H_ */