blob: 85ee05ece9c8cc8e7605910e80e695929874bb9b (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
|
#include "../comedidev.h"
#include "comedi_fc.h"
#include "pcm_common.h"
int comedi_pcm_cmdtest(struct comedi_device *dev,
struct comedi_subdevice *s, struct comedi_cmd *cmd)
{
int err = 0;
/* Step 1 : check if triggers are trivially valid */
err |= cfc_check_trigger_src(&cmd->start_src, TRIG_NOW | TRIG_INT);
err |= cfc_check_trigger_src(&cmd->scan_begin_src, TRIG_EXT);
err |= cfc_check_trigger_src(&cmd->convert_src, TRIG_NOW);
err |= cfc_check_trigger_src(&cmd->scan_end_src, TRIG_COUNT);
err |= cfc_check_trigger_src(&cmd->stop_src, TRIG_COUNT | TRIG_NONE);
if (err)
return 1;
/* Step 2a : make sure trigger sources are unique */
err |= cfc_check_trigger_is_unique(cmd->start_src);
err |= cfc_check_trigger_is_unique(cmd->stop_src);
/* Step 2b : and mutually compatible */
if (err)
return 2;
/* step 3: make sure arguments are trivially compatible */
/* cmd->start_src == TRIG_NOW || cmd->start_src == TRIG_INT */
if (cmd->start_arg != 0) {
cmd->start_arg = 0;
err++;
}
/* cmd->scan_begin_src == TRIG_EXT */
if (cmd->scan_begin_arg != 0) {
cmd->scan_begin_arg = 0;
err++;
}
/* cmd->convert_src == TRIG_NOW */
if (cmd->convert_arg != 0) {
cmd->convert_arg = 0;
err++;
}
/* cmd->scan_end_src == TRIG_COUNT */
if (cmd->scan_end_arg != cmd->chanlist_len) {
cmd->scan_end_arg = cmd->chanlist_len;
err++;
}
switch (cmd->stop_src) {
case TRIG_COUNT:
/* any count allowed */
break;
case TRIG_NONE:
if (cmd->stop_arg != 0) {
cmd->stop_arg = 0;
err++;
}
break;
default:
break;
}
if (err)
return 3;
/* step 4: fix up any arguments */
/* if (err) return 4; */
return 0;
}
EXPORT_SYMBOL(comedi_pcm_cmdtest);
MODULE_AUTHOR("Comedi http://www.comedi.org");
MODULE_DESCRIPTION("Comedi low-level driver");
MODULE_LICENSE("GPL");
|
