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
165
166
167
168
169
170
|
/* include/linux/gpio_event.h
*
* Copyright (C) 2007 Google, Inc.
*
* This software is licensed under the terms of the GNU General Public
* License version 2, as published by the Free Software Foundation, and
* may be copied, distributed, and modified under those terms.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
*/
#ifndef _LINUX_GPIO_EVENT_H
#define _LINUX_GPIO_EVENT_H
#include <linux/input.h>
struct gpio_event_input_devs {
int count;
struct input_dev *dev[];
};
enum {
GPIO_EVENT_FUNC_UNINIT = 0x0,
GPIO_EVENT_FUNC_INIT = 0x1,
GPIO_EVENT_FUNC_SUSPEND = 0x2,
GPIO_EVENT_FUNC_RESUME = 0x3,
};
struct gpio_event_info {
int (*func)(struct gpio_event_input_devs *input_devs,
struct gpio_event_info *info,
void **data, int func);
int (*event)(struct gpio_event_input_devs *input_devs,
struct gpio_event_info *info,
void **data, unsigned int dev, unsigned int type,
unsigned int code, int value); /* out events */
bool no_suspend;
};
struct gpio_event_platform_data {
const char *name;
struct gpio_event_info **info;
size_t info_count;
int (*power)(const struct gpio_event_platform_data *pdata, bool on);
const char *names[]; /* If name is NULL, names contain a NULL */
/* terminated list of input devices to create */
};
#define GPIO_EVENT_DEV_NAME "gpio-event"
/* Key matrix */
enum gpio_event_matrix_flags {
/* unset: drive active output low, set: drive active output high */
GPIOKPF_ACTIVE_HIGH = 1U << 0,
GPIOKPF_DEBOUNCE = 1U << 1,
GPIOKPF_REMOVE_SOME_PHANTOM_KEYS = 1U << 2,
GPIOKPF_REMOVE_PHANTOM_KEYS = GPIOKPF_REMOVE_SOME_PHANTOM_KEYS |
GPIOKPF_DEBOUNCE,
GPIOKPF_DRIVE_INACTIVE = 1U << 3,
GPIOKPF_LEVEL_TRIGGERED_IRQ = 1U << 4,
GPIOKPF_PRINT_UNMAPPED_KEYS = 1U << 16,
GPIOKPF_PRINT_MAPPED_KEYS = 1U << 17,
GPIOKPF_PRINT_PHANTOM_KEYS = 1U << 18,
};
#define MATRIX_CODE_BITS (10)
#define MATRIX_KEY_MASK ((1U << MATRIX_CODE_BITS) - 1)
#define MATRIX_KEY(dev, code) \
(((dev) << MATRIX_CODE_BITS) | (code & MATRIX_KEY_MASK))
extern int gpio_event_matrix_func(struct gpio_event_input_devs *input_devs,
struct gpio_event_info *info, void **data, int func);
struct gpio_event_matrix_info {
/* initialize to gpio_event_matrix_func */
struct gpio_event_info info;
/* size must be ninputs * noutputs */
const unsigned short *keymap;
unsigned int *input_gpios;
unsigned int *output_gpios;
unsigned int ninputs;
unsigned int noutputs;
/* time to wait before reading inputs after driving each output */
ktime_t settle_time;
/* time to wait before scanning the keypad a second time */
ktime_t debounce_delay;
ktime_t poll_time;
unsigned flags;
};
/* Directly connected inputs and outputs */
enum gpio_event_direct_flags {
GPIOEDF_ACTIVE_HIGH = 1U << 0,
/* GPIOEDF_USE_DOWN_IRQ = 1U << 1, */
/* GPIOEDF_USE_IRQ = (1U << 2) | GPIOIDF_USE_DOWN_IRQ, */
GPIOEDF_PRINT_KEYS = 1U << 8,
GPIOEDF_PRINT_KEY_DEBOUNCE = 1U << 9,
GPIOEDF_PRINT_KEY_UNSTABLE = 1U << 10,
};
struct gpio_event_direct_entry {
uint32_t gpio:16;
uint32_t code:10;
uint32_t dev:6;
};
/* inputs */
extern int gpio_event_input_func(struct gpio_event_input_devs *input_devs,
struct gpio_event_info *info, void **data, int func);
struct gpio_event_input_info {
/* initialize to gpio_event_input_func */
struct gpio_event_info info;
ktime_t debounce_time;
ktime_t poll_time;
uint16_t flags;
uint16_t type;
const struct gpio_event_direct_entry *keymap;
size_t keymap_size;
};
/* outputs */
extern int gpio_event_output_func(struct gpio_event_input_devs *input_devs,
struct gpio_event_info *info, void **data, int func);
extern int gpio_event_output_event(struct gpio_event_input_devs *input_devs,
struct gpio_event_info *info, void **data,
unsigned int dev, unsigned int type,
unsigned int code, int value);
struct gpio_event_output_info {
/* initialize to gpio_event_output_func and gpio_event_output_event */
struct gpio_event_info info;
uint16_t flags;
uint16_t type;
const struct gpio_event_direct_entry *keymap;
size_t keymap_size;
};
/* axes */
enum gpio_event_axis_flags {
GPIOEAF_PRINT_UNKNOWN_DIRECTION = 1U << 16,
GPIOEAF_PRINT_RAW = 1U << 17,
GPIOEAF_PRINT_EVENT = 1U << 18,
};
extern int gpio_event_axis_func(struct gpio_event_input_devs *input_devs,
struct gpio_event_info *info, void **data, int func);
struct gpio_event_axis_info {
/* initialize to gpio_event_axis_func */
struct gpio_event_info info;
uint8_t count; /* number of gpios for this axis */
uint8_t dev; /* device index when using multiple input devices */
uint8_t type; /* EV_REL or EV_ABS */
uint16_t code;
uint16_t decoded_size;
uint16_t (*map)(struct gpio_event_axis_info *info, uint16_t in);
uint32_t *gpio;
uint32_t flags;
};
#define gpio_axis_2bit_gray_map gpio_axis_4bit_gray_map
#define gpio_axis_3bit_gray_map gpio_axis_4bit_gray_map
uint16_t gpio_axis_4bit_gray_map(
struct gpio_event_axis_info *info, uint16_t in);
uint16_t gpio_axis_5bit_singletrack_map(
struct gpio_event_axis_info *info, uint16_t in);
#endif
|