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
iio_simple_dummy_events_register(struct iio_dev * indio_dev)88 iio_simple_dummy_events_register(struct iio_dev *indio_dev)
89 {
90 return 0;
91 }
92
93 static inline void
iio_simple_dummy_events_unregister(struct iio_dev * indio_dev)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
iio_simple_dummy_configure_buffer(struct iio_dev * indio_dev)119 static inline int iio_simple_dummy_configure_buffer(struct iio_dev *indio_dev)
120 {
121 return 0;
122 }
123
124 static inline
iio_simple_dummy_unconfigure_buffer(struct iio_dev * indio_dev)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_ */
130