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 theshold 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 #endif /* CONFIG_IIO_SIMPLE_DUMMY_EVENTS */
50 };
51
52 #ifdef CONFIG_IIO_SIMPLE_DUMMY_EVENTS
53
54 struct iio_dev;
55
56 int iio_simple_dummy_read_event_config(struct iio_dev *indio_dev,
57 const struct iio_chan_spec *chan,
58 enum iio_event_type type,
59 enum iio_event_direction dir);
60
61 int iio_simple_dummy_write_event_config(struct iio_dev *indio_dev,
62 const struct iio_chan_spec *chan,
63 enum iio_event_type type,
64 enum iio_event_direction dir,
65 int state);
66
67 int iio_simple_dummy_read_event_value(struct iio_dev *indio_dev,
68 const struct iio_chan_spec *chan,
69 enum iio_event_type type,
70 enum iio_event_direction dir,
71 enum iio_event_info info, int *val,
72 int *val2);
73
74 int iio_simple_dummy_write_event_value(struct iio_dev *indio_dev,
75 const struct iio_chan_spec *chan,
76 enum iio_event_type type,
77 enum iio_event_direction dir,
78 enum iio_event_info info, int val,
79 int val2);
80
81 int iio_simple_dummy_events_register(struct iio_dev *indio_dev);
82 int iio_simple_dummy_events_unregister(struct iio_dev *indio_dev);
83
84 #else /* Stubs for when events are disabled at compile time */
85
86 static inline int
iio_simple_dummy_events_register(struct iio_dev * indio_dev)87 iio_simple_dummy_events_register(struct iio_dev *indio_dev)
88 {
89 return 0;
90 };
91
92 static inline int
iio_simple_dummy_events_unregister(struct iio_dev * indio_dev)93 iio_simple_dummy_events_unregister(struct iio_dev *indio_dev)
94 {
95 return 0;
96 };
97
98 #endif /* CONFIG_IIO_SIMPLE_DUMMY_EVENTS*/
99
100 /**
101 * enum iio_simple_dummy_scan_elements - scan index enum
102 * @voltage0: the single ended voltage channel
103 * @diffvoltage1m2: first differential channel
104 * @diffvoltage3m4: second differenial channel
105 * @accelx: acceleration channel
106 *
107 * Enum provides convenient numbering for the scan index.
108 */
109 enum iio_simple_dummy_scan_elements {
110 voltage0,
111 diffvoltage1m2,
112 diffvoltage3m4,
113 accelx,
114 };
115
116 #ifdef CONFIG_IIO_SIMPLE_DUMMY_BUFFER
117 int iio_simple_dummy_configure_buffer(struct iio_dev *indio_dev);
118 void iio_simple_dummy_unconfigure_buffer(struct iio_dev *indio_dev);
119 #else
iio_simple_dummy_configure_buffer(struct iio_dev * indio_dev)120 static inline int iio_simple_dummy_configure_buffer(struct iio_dev *indio_dev)
121 {
122 return 0;
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