3 * This is a place for code driver writers wish to share between
4 * two or more drivers. These functions are meant to be used only
5 * by drivers, they are NOT part of the kcomedilib API!
7 * Author: Frank Mori Hess <fmhess@users.sourceforge.net>
8 * Copyright (C) 2002 Frank Mori Hess
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
24 #include "../comedidev.h"
26 unsigned int cfc_bytes_per_scan(struct comedi_subdevice *);
27 void cfc_inc_scan_progress(struct comedi_subdevice *, unsigned int num_bytes);
29 /* Writes an array of data points to comedi's buffer */
30 unsigned int cfc_write_array_to_buffer(struct comedi_subdevice *,
31 void *data, unsigned int num_bytes);
33 static inline unsigned int cfc_write_to_buffer(struct comedi_subdevice *s,
36 return cfc_write_array_to_buffer(s, &data, sizeof(data));
39 static inline unsigned int cfc_write_long_to_buffer(struct comedi_subdevice *s,
42 return cfc_write_array_to_buffer(s, &data, sizeof(data));
45 unsigned int cfc_read_array_from_buffer(struct comedi_subdevice *,
46 void *data, unsigned int num_bytes);
48 unsigned int cfc_handle_events(struct comedi_device *,
49 struct comedi_subdevice *);
52 * cfc_check_trigger_src() - trivially validate a comedi_cmd trigger source
53 * @src: pointer to the trigger source to validate
54 * @flags: bitmask of valid TRIG_* for the trigger
56 * This is used in "step 1" of the do_cmdtest functions of comedi drivers
57 * to vaildate the comedi_cmd triggers. The mask of the @src against the
58 * @flags allows the userspace comedilib to pass all the comedi_cmd
59 * triggers as TRIG_ANY and get back a bitmask of the valid trigger sources.
61 static inline int cfc_check_trigger_src(unsigned int *src, unsigned int flags)
63 unsigned int orig_src = *src;
65 *src = orig_src & flags;
66 if (*src == TRIG_INVALID || *src != orig_src)
72 * cfc_check_trigger_is_unique() - make sure a trigger source is unique
73 * @src: the trigger source to check
75 static inline int cfc_check_trigger_is_unique(unsigned int src)
77 /* this test is true if more than one _src bit is set */
78 if ((src & (src - 1)) != 0)
84 * cfc_check_trigger_arg_is() - trivially validate a trigger argument
85 * @arg: pointer to the trigger arg to validate
86 * @val: the value the argument should be
88 static inline int cfc_check_trigger_arg_is(unsigned int *arg, unsigned int val)
98 * cfc_check_trigger_arg_min() - trivially validate a trigger argument
99 * @arg: pointer to the trigger arg to validate
100 * @val: the minimum value the argument should be
102 static inline int cfc_check_trigger_arg_min(unsigned int *arg,
113 * cfc_check_trigger_arg_max() - trivially validate a trigger argument
114 * @arg: pointer to the trigger arg to validate
115 * @val: the maximum value the argument should be
117 static inline int cfc_check_trigger_arg_max(unsigned int *arg,
127 #endif /* _COMEDI_FC_H */