drivers/iio/dummy/iio_simple_dummy.h

   1 /**
   2  * Copyright (c) 2011 Jonathan Cameron
   3  *
   4  * This program is free software; you can redistribute it and/or modify it
   5  * under the terms of the GNU General Public License version 2 as published by
   6  * the Free Software Foundation.
   7  *
   8  * Join together the various functionality of iio_simple_dummy driver
   9  */
  10
  11 #ifndef _IIO_SIMPLE_DUMMY_H_
  12 #define _IIO_SIMPLE_DUMMY_H_
  13 #include <linux/kernel.h>
  14
  15 struct iio_dummy_accel_calibscale;
  16 struct iio_dummy_regs;
  17
  18 /**
  19  * struct iio_dummy_state - device instance specific state.
  20  * @dac_val:                    cache for dac value
  21  * @single_ended_adc_val:       cache for single ended adc value
  22  * @differential_adc_val:       cache for differential adc value
  23  * @accel_val:                  cache for acceleration value
  24  * @accel_calibbias:            cache for acceleration calibbias
  25  * @accel_calibscale:           cache for acceleration calibscale
  26  * @lock:                       lock to ensure state is consistent
  27  * @event_irq:                  irq number for event line (faked)
  28  * @event_val:                  cache for event threshold value
  29  * @event_en:                   cache of whether event is enabled
  30  */
  31 struct iio_dummy_state {
  32         int dac_val;
  33         int single_ended_adc_val;
  34         int differential_adc_val[2];
  35         int accel_val;
  36         int accel_calibbias;
  37         int activity_running;
  38         int activity_walking;
  39         const struct iio_dummy_accel_calibscale *accel_calibscale;
  40         struct mutex lock;
  41         struct iio_dummy_regs *regs;
  42         int steps_enabled;
  43         int steps;
  44         int height;
  45 #ifdef CONFIG_IIO_SIMPLE_DUMMY_EVENTS
  46         int event_irq;
  47         int event_val;
  48         bool event_en;
  49         s64 event_timestamp;
  50 #endif /* CONFIG_IIO_SIMPLE_DUMMY_EVENTS */
  51 };
  52
  53 #ifdef CONFIG_IIO_SIMPLE_DUMMY_EVENTS
  54
  55 struct iio_dev;
  56
  57 int iio_simple_dummy_read_event_config(struct iio_dev *indio_dev,
  58                                        const struct iio_chan_spec *chan,
  59                                        enum iio_event_type type,
  60                                        enum iio_event_direction dir);
  61
  62 int iio_simple_dummy_write_event_config(struct iio_dev *indio_dev,
  63                                         const struct iio_chan_spec *chan,
  64                                         enum iio_event_type type,
  65                                         enum iio_event_direction dir,
  66                                         int state);
  67
  68 int iio_simple_dummy_read_event_value(struct iio_dev *indio_dev,
  69                                       const struct iio_chan_spec *chan,
  70                                       enum iio_event_type type,
  71                                       enum iio_event_direction dir,
  72                                       enum iio_event_info info, int *val,
  73                                       int *val2);
  74
  75 int iio_simple_dummy_write_event_value(struct iio_dev *indio_dev,
  76                                        const struct iio_chan_spec *chan,
  77                                        enum iio_event_type type,
  78                                        enum iio_event_direction dir,
  79                                        enum iio_event_info info, int val,
  80                                        int val2);
  81
  82 int iio_simple_dummy_events_register(struct iio_dev *indio_dev);
  83 void iio_simple_dummy_events_unregister(struct iio_dev *indio_dev);
  84
  85 #else /* Stubs for when events are disabled at compile time */
  86
  87 static inline int
  88 iio_simple_dummy_events_register(struct iio_dev *indio_dev)
  89 {
  90         return 0;
  91 };
  92
  93 static inline void
  94 iio_simple_dummy_events_unregister(struct iio_dev *indio_dev)
  95 { };
  96
  97 #endif /* CONFIG_IIO_SIMPLE_DUMMY_EVENTS*/
  98
  99 /**
 100  * enum iio_simple_dummy_scan_elements - scan index enum
 101  * @DUMMY_INDEX_VOLTAGE_0:         the single ended voltage channel
 102  * @DUMMY_INDEX_DIFFVOLTAGE_1M2:   first differential channel
 103  * @DUMMY_INDEX_DIFFVOLTAGE_3M4:   second differential channel
 104  * @DUMMY_INDEX_ACCELX:            acceleration channel
 105  *
 106  * Enum provides convenient numbering for the scan index.
 107  */
 108 enum iio_simple_dummy_scan_elements {
 109         DUMMY_INDEX_VOLTAGE_0,
 110         DUMMY_INDEX_DIFFVOLTAGE_1M2,
 111         DUMMY_INDEX_DIFFVOLTAGE_3M4,
 112         DUMMY_INDEX_ACCELX,
 113 };
 114
 115 #ifdef CONFIG_IIO_SIMPLE_DUMMY_BUFFER
 116 int iio_simple_dummy_configure_buffer(struct iio_dev *indio_dev);
 117 void iio_simple_dummy_unconfigure_buffer(struct iio_dev *indio_dev);
 118 #else
 119 static inline int iio_simple_dummy_configure_buffer(struct iio_dev *indio_dev)
 120 {
 121         return 0;
 122 };
 123
 124 static inline
 125 void iio_simple_dummy_unconfigure_buffer(struct iio_dev *indio_dev)
 126 {};
 127
 128 #endif /* CONFIG_IIO_SIMPLE_DUMMY_BUFFER */
 129 #endif /* _IIO_SIMPLE_DUMMY_H_ */