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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
21#define ARRAY_SIZE(arr) (sizeof(arr) / sizeof(arr[0]))
22
23extern const char *iio_dir;
24
25/**
26 * struct iio_channel_info - information about a given channel
27 * @name: channel name
28 * @generic_name: general name for channel type
29 * @scale: scale factor to be applied for conversion to si units
30 * @offset: offset to be applied for conversion to si units
31 * @index: the channel index in the buffer output
32 * @bytes: number of bytes occupied in buffer output
33 * @bits_used: number of valid bits of data
34 * @shift: amount of bits to shift right data before applying bit mask
35 * @mask: a bit mask for the raw output
36 * @be: flag if data is big endian
37 * @is_signed: is the raw value stored signed
38 * @location: data offset for this channel inside the buffer (in bytes)
39 **/
40struct iio_channel_info {
41 char *name;
42 char *generic_name;
43 float scale;
44 float offset;
45 unsigned index;
46 unsigned bytes;
47 unsigned bits_used;
48 unsigned shift;
49 uint64_t mask;
50 unsigned be;
51 unsigned is_signed;
52 unsigned location;
53};
54
55static inline int iioutils_check_suffix(const char *str, const char *suffix)
56{
57 return strlen(str) >= strlen(suffix) &&
58 strncmp(str+strlen(str)-strlen(suffix),
59 suffix, strlen(suffix)) == 0;
60}
61
62int iioutils_break_up_name(const char *full_name, char **generic_name);
63int iioutils_get_type(unsigned *is_signed, unsigned *bytes, unsigned *bits_used,
64 unsigned *shift, uint64_t *mask, unsigned *be,
65 const char *device_dir, const char *name,
66 const char *generic_name);
67int iioutils_get_param_float(float *output, const char *param_name,
68 const char *device_dir, const char *name,
69 const char *generic_name);
70void bsort_channel_array_by_index(struct iio_channel_info *ci_array, int cnt);
71int build_channel_array(const char *device_dir,
72 struct iio_channel_info **ci_array, int *counter);
73int find_type_by_name(const char *name, const char *type);
74int write_sysfs_int(const char *filename, const char *basedir, int val);
75int write_sysfs_int_and_verify(const char *filename, const char *basedir,
76 int val);
77int write_sysfs_string_and_verify(const char *filename, const char *basedir,
78 const char *val);
79int write_sysfs_string(const char *filename, const char *basedir,
80 const char *val);
81int read_sysfs_posint(const char *filename, const char *basedir);
82int read_sysfs_float(const char *filename, const char *basedir, float *val);
83int read_sysfs_string(const char *filename, const char *basedir, char *str);
84
85#endif /* _IIO_UTILS_H_ */
1/* SPDX-License-Identifier: GPL-2.0-only */
2#ifndef _IIO_UTILS_H_
3#define _IIO_UTILS_H_
4
5/* IIO - useful set of util functionality
6 *
7 * Copyright (c) 2008 Jonathan Cameron
8 */
9
10#include <stdint.h>
11
12/* Made up value to limit allocation sizes */
13#define IIO_MAX_NAME_LENGTH 64
14
15#define FORMAT_SCAN_ELEMENTS_DIR "%s/buffer%d"
16#define FORMAT_EVENTS_DIR "%s/events"
17#define FORMAT_TYPE_FILE "%s_type"
18
19#define ARRAY_SIZE(arr) (sizeof(arr) / sizeof(arr[0]))
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 * @bits_used: number of valid bits of data
32 * @shift: amount of bits to shift right data before applying bit mask
33 * @mask: a bit mask for the raw output
34 * @be: flag if data is big endian
35 * @is_signed: is the raw value stored signed
36 * @location: data offset for this channel inside the buffer (in bytes)
37 **/
38struct iio_channel_info {
39 char *name;
40 char *generic_name;
41 float scale;
42 float offset;
43 unsigned index;
44 unsigned bytes;
45 unsigned bits_used;
46 unsigned shift;
47 uint64_t mask;
48 unsigned be;
49 unsigned is_signed;
50 unsigned location;
51};
52
53static inline int iioutils_check_suffix(const char *str, const char *suffix)
54{
55 return strlen(str) >= strlen(suffix) &&
56 strncmp(str+strlen(str)-strlen(suffix),
57 suffix, strlen(suffix)) == 0;
58}
59
60int iioutils_break_up_name(const char *full_name, char **generic_name);
61int iioutils_get_param_float(float *output, const char *param_name,
62 const char *device_dir, const char *name,
63 const char *generic_name);
64void bsort_channel_array_by_index(struct iio_channel_info *ci_array, int cnt);
65int build_channel_array(const char *device_dir, int buffer_idx,
66 struct iio_channel_info **ci_array, int *counter);
67int find_type_by_name(const char *name, const char *type);
68int write_sysfs_int(const char *filename, const char *basedir, int val);
69int write_sysfs_int_and_verify(const char *filename, const char *basedir,
70 int val);
71int write_sysfs_string_and_verify(const char *filename, const char *basedir,
72 const char *val);
73int write_sysfs_string(const char *filename, const char *basedir,
74 const char *val);
75int read_sysfs_posint(const char *filename, const char *basedir);
76int read_sysfs_float(const char *filename, const char *basedir, float *val);
77int read_sysfs_string(const char *filename, const char *basedir, char *str);
78
79#endif /* _IIO_UTILS_H_ */