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
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
|
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
/*
* Userspace ABI for Counter character devices
* Copyright (C) 2020 William Breathitt Gray
*/
#ifndef _UAPI_COUNTER_H_
#define _UAPI_COUNTER_H_
#include <linux/ioctl.h>
#include <linux/types.h>
/* Component type definitions */
enum counter_component_type {
COUNTER_COMPONENT_NONE,
COUNTER_COMPONENT_SIGNAL,
COUNTER_COMPONENT_COUNT,
COUNTER_COMPONENT_FUNCTION,
COUNTER_COMPONENT_SYNAPSE_ACTION,
COUNTER_COMPONENT_EXTENSION,
};
/* Component scope definitions */
enum counter_scope {
COUNTER_SCOPE_DEVICE,
COUNTER_SCOPE_SIGNAL,
COUNTER_SCOPE_COUNT,
};
/**
* struct counter_component - Counter component identification
* @type: component type (one of enum counter_component_type)
* @scope: component scope (one of enum counter_scope)
* @parent: parent ID (matching the ID suffix of the respective parent sysfs
* path as described by the ABI documentation file
* Documentation/ABI/testing/sysfs-bus-counter)
* @id: component ID (matching the ID provided by the respective *_component_id
* sysfs attribute of the desired component)
*
* For example, if the Count 2 ceiling extension of Counter device 4 is desired,
* set type equal to COUNTER_COMPONENT_EXTENSION, scope equal to
* COUNTER_COUNT_SCOPE, parent equal to 2, and id equal to the value provided by
* the respective /sys/bus/counter/devices/counter4/count2/ceiling_component_id
* sysfs attribute.
*/
struct counter_component {
__u8 type;
__u8 scope;
__u8 parent;
__u8 id;
};
/* Event type definitions */
enum counter_event_type {
/* Count value increased past ceiling */
COUNTER_EVENT_OVERFLOW,
/* Count value decreased past floor */
COUNTER_EVENT_UNDERFLOW,
/* Count value increased past ceiling, or decreased past floor */
COUNTER_EVENT_OVERFLOW_UNDERFLOW,
/* Count value reached threshold */
COUNTER_EVENT_THRESHOLD,
/* Index signal detected */
COUNTER_EVENT_INDEX,
/* State of counter is changed */
COUNTER_EVENT_CHANGE_OF_STATE,
/* Count value captured */
COUNTER_EVENT_CAPTURE,
};
/**
* struct counter_watch - Counter component watch configuration
* @component: component to watch when event triggers
* @event: event that triggers (one of enum counter_event_type)
* @channel: event channel (typically 0 unless the device supports concurrent
* events of the same type)
*/
struct counter_watch {
struct counter_component component;
__u8 event;
__u8 channel;
};
/*
* Queues a Counter watch for the specified event.
*
* The queued watches will not be applied until COUNTER_ENABLE_EVENTS_IOCTL is
* called.
*/
#define COUNTER_ADD_WATCH_IOCTL _IOW(0x3E, 0x00, struct counter_watch)
/*
* Enables monitoring the events specified by the Counter watches that were
* queued by COUNTER_ADD_WATCH_IOCTL.
*
* If events are already enabled, the new set of watches replaces the old one.
* Calling this ioctl also has the effect of clearing the queue of watches added
* by COUNTER_ADD_WATCH_IOCTL.
*/
#define COUNTER_ENABLE_EVENTS_IOCTL _IO(0x3E, 0x01)
/*
* Stops monitoring the previously enabled events.
*/
#define COUNTER_DISABLE_EVENTS_IOCTL _IO(0x3E, 0x02)
/**
* struct counter_event - Counter event data
* @timestamp: best estimate of time of event occurrence, in nanoseconds
* @value: component value
* @watch: component watch configuration
* @status: return status (system error number)
*/
struct counter_event {
__aligned_u64 timestamp;
__aligned_u64 value;
struct counter_watch watch;
__u8 status;
};
/* Count direction values */
enum counter_count_direction {
COUNTER_COUNT_DIRECTION_FORWARD,
COUNTER_COUNT_DIRECTION_BACKWARD,
};
/* Count mode values */
enum counter_count_mode {
COUNTER_COUNT_MODE_NORMAL,
COUNTER_COUNT_MODE_RANGE_LIMIT,
COUNTER_COUNT_MODE_NON_RECYCLE,
COUNTER_COUNT_MODE_MODULO_N,
};
/* Count function values */
enum counter_function {
COUNTER_FUNCTION_INCREASE,
COUNTER_FUNCTION_DECREASE,
COUNTER_FUNCTION_PULSE_DIRECTION,
COUNTER_FUNCTION_QUADRATURE_X1_A,
COUNTER_FUNCTION_QUADRATURE_X1_B,
COUNTER_FUNCTION_QUADRATURE_X2_A,
COUNTER_FUNCTION_QUADRATURE_X2_B,
COUNTER_FUNCTION_QUADRATURE_X4,
};
/* Signal values */
enum counter_signal_level {
COUNTER_SIGNAL_LEVEL_LOW,
COUNTER_SIGNAL_LEVEL_HIGH,
};
/* Action mode values */
enum counter_synapse_action {
COUNTER_SYNAPSE_ACTION_NONE,
COUNTER_SYNAPSE_ACTION_RISING_EDGE,
COUNTER_SYNAPSE_ACTION_FALLING_EDGE,
COUNTER_SYNAPSE_ACTION_BOTH_EDGES,
};
/* Signal polarity values */
enum counter_signal_polarity {
COUNTER_SIGNAL_POLARITY_POSITIVE,
COUNTER_SIGNAL_POLARITY_NEGATIVE,
};
#endif /* _UAPI_COUNTER_H_ */
|
