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gerrit-public.fairphone.software / kernel / msm / a7983b33d106508d2e9cd11521891d83b4221fe7 / . / include / linux / gpio_event.h
blob: 2613fc5e4a93c050b11150f1488f0c8de8726ffe [file] [log] [blame]
Arve Hjønnevågc3fffcb2008-10-15 18:23:47 -0700[diff] [blame]1/* include/linux/gpio_event.h
2 *
3 * Copyright (C) 2007 Google, Inc.
4 *
5 * This software is licensed under the terms of the GNU General Public
6 * License version 2, as published by the Free Software Foundation, and
7 * may be copied, distributed, and modified under those terms.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 */
15
16#ifndef _LINUX_GPIO_EVENT_H
17#define _LINUX_GPIO_EVENT_H
18
19#include <linux/input.h>
20
21struct gpio_event_input_devs {
22 int count;
23 struct input_dev *dev[];
24};
25enum {
26 GPIO_EVENT_FUNC_UNINIT = 0x0,
27 GPIO_EVENT_FUNC_INIT = 0x1,
28 GPIO_EVENT_FUNC_SUSPEND = 0x2,
29 GPIO_EVENT_FUNC_RESUME = 0x3,
30};
31struct gpio_event_info {
32 int (*func)(struct gpio_event_input_devs *input_devs,
33 struct gpio_event_info *info,
34 void **data, int func);
35 int (*event)(struct gpio_event_input_devs *input_devs,
36 struct gpio_event_info *info,
37 void **data, unsigned int dev, unsigned int type,
38 unsigned int code, int value); /* out events */
39 bool no_suspend;
40};
41
42struct gpio_event_platform_data {
43 const char *name;
44 struct gpio_event_info **info;
45 size_t info_count;
46 int (*power)(const struct gpio_event_platform_data *pdata, bool on);
47 const char *names[]; /* If name is NULL, names contain a NULL */
48 /* terminated list of input devices to create */
49};
50
51#define GPIO_EVENT_DEV_NAME "gpio-event"
52
53/* Key matrix */
54
55enum gpio_event_matrix_flags {
56 /* unset: drive active output low, set: drive active output high */
57 GPIOKPF_ACTIVE_HIGH = 1U << 0,
58 GPIOKPF_DEBOUNCE = 1U << 1,
59 GPIOKPF_REMOVE_SOME_PHANTOM_KEYS = 1U << 2,
60 GPIOKPF_REMOVE_PHANTOM_KEYS = GPIOKPF_REMOVE_SOME_PHANTOM_KEYS |
61 GPIOKPF_DEBOUNCE,
62 GPIOKPF_DRIVE_INACTIVE = 1U << 3,
63 GPIOKPF_LEVEL_TRIGGERED_IRQ = 1U << 4,
64 GPIOKPF_PRINT_UNMAPPED_KEYS = 1U << 16,
65 GPIOKPF_PRINT_MAPPED_KEYS = 1U << 17,
66 GPIOKPF_PRINT_PHANTOM_KEYS = 1U << 18,
67};
68
69#define MATRIX_CODE_BITS (10)
70#define MATRIX_KEY_MASK ((1U << MATRIX_CODE_BITS) - 1)
71#define MATRIX_KEY(dev, code) \
72 (((dev) << MATRIX_CODE_BITS) | (code & MATRIX_KEY_MASK))
73
74extern int gpio_event_matrix_func(struct gpio_event_input_devs *input_devs,
75 struct gpio_event_info *info, void **data, int func);
76struct gpio_event_matrix_info {
77 /* initialize to gpio_event_matrix_func */
78 struct gpio_event_info info;
79 /* size must be ninputs * noutputs */
80 const unsigned short *keymap;
81 unsigned int *input_gpios;
82 unsigned int *output_gpios;
83 unsigned int ninputs;
84 unsigned int noutputs;
85 /* time to wait before reading inputs after driving each output */
86 ktime_t settle_time;
87 /* time to wait before scanning the keypad a second time */
88 ktime_t debounce_delay;
89 ktime_t poll_time;
90 unsigned flags;
91};
92
93/* Directly connected inputs and outputs */
94
95enum gpio_event_direct_flags {
96 GPIOEDF_ACTIVE_HIGH = 1U << 0,
97/* GPIOEDF_USE_DOWN_IRQ = 1U << 1, */
98/* GPIOEDF_USE_IRQ = (1U << 2) | GPIOIDF_USE_DOWN_IRQ, */
99 GPIOEDF_PRINT_KEYS = 1U << 8,
100 GPIOEDF_PRINT_KEY_DEBOUNCE = 1U << 9,
101 GPIOEDF_PRINT_KEY_UNSTABLE = 1U << 10,
102};
103
104struct gpio_event_direct_entry {
105 uint32_t gpio:16;
106 uint32_t code:10;
107 uint32_t dev:6;
108};
109
110/* inputs */
111extern int gpio_event_input_func(struct gpio_event_input_devs *input_devs,
112 struct gpio_event_info *info, void **data, int func);
113struct gpio_event_input_info {
114 /* initialize to gpio_event_input_func */
115 struct gpio_event_info info;
116 ktime_t debounce_time;
117 ktime_t poll_time;
118 uint16_t flags;
119 uint16_t type;
120 const struct gpio_event_direct_entry *keymap;
121 size_t keymap_size;
122};
123
124/* outputs */
125extern int gpio_event_output_func(struct gpio_event_input_devs *input_devs,
126 struct gpio_event_info *info, void **data, int func);
127extern int gpio_event_output_event(struct gpio_event_input_devs *input_devs,
128 struct gpio_event_info *info, void **data,
129 unsigned int dev, unsigned int type,
130 unsigned int code, int value);
131struct gpio_event_output_info {
132 /* initialize to gpio_event_output_func and gpio_event_output_event */
133 struct gpio_event_info info;
134 uint16_t flags;
135 uint16_t type;
136 const struct gpio_event_direct_entry *keymap;
137 size_t keymap_size;
138};
139
140
141/* axes */
142
143enum gpio_event_axis_flags {
144 GPIOEAF_PRINT_UNKNOWN_DIRECTION = 1U << 16,
145 GPIOEAF_PRINT_RAW = 1U << 17,
146 GPIOEAF_PRINT_EVENT = 1U << 18,
147};
148
149extern int gpio_event_axis_func(struct gpio_event_input_devs *input_devs,
150 struct gpio_event_info *info, void **data, int func);
151struct gpio_event_axis_info {
152 /* initialize to gpio_event_axis_func */
153 struct gpio_event_info info;
154 uint8_t count; /* number of gpios for this axis */
155 uint8_t dev; /* device index when using multiple input devices */
156 uint8_t type; /* EV_REL or EV_ABS */
157 uint16_t code;
158 uint16_t decoded_size;
159 uint16_t (*map)(struct gpio_event_axis_info *info, uint16_t in);
160 uint32_t *gpio;
161 uint32_t flags;
162};
163#define gpio_axis_2bit_gray_map gpio_axis_4bit_gray_map
164#define gpio_axis_3bit_gray_map gpio_axis_4bit_gray_map
165uint16_t gpio_axis_4bit_gray_map(
166 struct gpio_event_axis_info *info, uint16_t in);
167uint16_t gpio_axis_5bit_singletrack_map(
168 struct gpio_event_axis_info *info, uint16_t in);
169
170#endif