1#ifndef _IIO_UTILS_H_
2#define _IIO_UTILS_H_
3
4/* IIO - useful set of util functionality
5 *
6 * Copyright (c) 2008 Jonathan Cameron
7 *
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms of the GNU General Public License version 2 as published by
10 * the Free Software Foundation.
11 */
12
13#include <stdint.h>
14
15/* Made up value to limit allocation sizes */
16#define IIO_MAX_NAME_LENGTH 30
17
18#define FORMAT_SCAN_ELEMENTS_DIR "%s/scan_elements"
19#define FORMAT_TYPE_FILE "%s_type"
20
21extern const char *iio_dir;
22
23/**
24 * struct iio_channel_info - information about a given channel
25 * @name: channel name
26 * @generic_name: general name for channel type
27 * @scale: scale factor to be applied for conversion to si units
28 * @offset: offset to be applied for conversion to si units
29 * @index: the channel index in the buffer output
30 * @bytes: number of bytes occupied in buffer output
31 * @mask: a bit mask for the raw output
32 * @is_signed: is the raw value stored signed
33 * @enabled: is this channel enabled
34 **/
35struct iio_channel_info {
36	char *name;
37	char *generic_name;
38	float scale;
39	float offset;
40	unsigned index;
41	unsigned bytes;
42	unsigned bits_used;
43	unsigned shift;
44	uint64_t mask;
45	unsigned be;
46	unsigned is_signed;
47	unsigned location;
48};
49
50int iioutils_break_up_name(const char *full_name, char **generic_name);
51int iioutils_get_type(unsigned *is_signed, unsigned *bytes,
52					  unsigned *bits_used, unsigned *shift,
53					  uint64_t *mask, unsigned *be,
54					  const char *device_dir, const char *name,
55					  const char *generic_name);
56int iioutils_get_param_float(float *output, const char *param_name,
57							 const char *device_dir, const char *name,
58							 const char *generic_name);
59void bsort_channel_array_by_index(struct iio_channel_info **ci_array, int cnt);
60int build_channel_array(const char *device_dir,
61						struct iio_channel_info **ci_array, int *counter);
62int find_type_by_name(const char *name, const char *type);
63int write_sysfs_int(char *filename, char *basedir, int val);
64int write_sysfs_int_and_verify(char *filename, char *basedir, int val);
65int write_sysfs_string_and_verify(char *filename, char *basedir, char *val);
66int write_sysfs_string(char *filename, char *basedir, char *val);
67int read_sysfs_posint(char *filename, char *basedir);
68int read_sysfs_float(char *filename, char *basedir, float *val);
69int read_sysfs_string(const char *filename, const char *basedir, char *str);
70
71#endif /* _IIO_UTILS_H_ */
72