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review.evervolv.com / android_kernel_htc_msm8960 / c36b867e5b9747a027e3ef633ab2b85f0cda90a2 / . / include / linux / gpio_event.h
blob: 71ee16ad13650625cee1e7f323b7d4e37b378b9c [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;
Flemmardc36b8672013-10-23 17:43:54 +0200[diff] [blame^]40#ifdef CONFIG_OPTICALJOYSTICK_CRUCIAL
41 bool oj_btn;
42#endif
Arve Hjønnevågc3fffcb2008-10-15 18:23:47 -0700[diff] [blame]43};
44
45struct gpio_event_platform_data {
46 const char *name;
47 struct gpio_event_info **info;
48 size_t info_count;
49 int (*power)(const struct gpio_event_platform_data *pdata, bool on);
50 const char *names[]; /* If name is NULL, names contain a NULL */
51 /* terminated list of input devices to create */
52};
53
54#define GPIO_EVENT_DEV_NAME "gpio-event"
55
56/* Key matrix */
57
58enum gpio_event_matrix_flags {
59 /* unset: drive active output low, set: drive active output high */
60 GPIOKPF_ACTIVE_HIGH = 1U << 0,
61 GPIOKPF_DEBOUNCE = 1U << 1,
62 GPIOKPF_REMOVE_SOME_PHANTOM_KEYS = 1U << 2,
63 GPIOKPF_REMOVE_PHANTOM_KEYS = GPIOKPF_REMOVE_SOME_PHANTOM_KEYS |
64 GPIOKPF_DEBOUNCE,
65 GPIOKPF_DRIVE_INACTIVE = 1U << 3,
66 GPIOKPF_LEVEL_TRIGGERED_IRQ = 1U << 4,
67 GPIOKPF_PRINT_UNMAPPED_KEYS = 1U << 16,
68 GPIOKPF_PRINT_MAPPED_KEYS = 1U << 17,
69 GPIOKPF_PRINT_PHANTOM_KEYS = 1U << 18,
70};
71
72#define MATRIX_CODE_BITS (10)
73#define MATRIX_KEY_MASK ((1U << MATRIX_CODE_BITS) - 1)
74#define MATRIX_KEY(dev, code) \
75 (((dev) << MATRIX_CODE_BITS) | (code & MATRIX_KEY_MASK))
76
77extern int gpio_event_matrix_func(struct gpio_event_input_devs *input_devs,
78 struct gpio_event_info *info, void **data, int func);
79struct gpio_event_matrix_info {
80 /* initialize to gpio_event_matrix_func */
81 struct gpio_event_info info;
82 /* size must be ninputs * noutputs */
83 const unsigned short *keymap;
84 unsigned int *input_gpios;
85 unsigned int *output_gpios;
86 unsigned int ninputs;
87 unsigned int noutputs;
88 /* time to wait before reading inputs after driving each output */
89 ktime_t settle_time;
90 /* time to wait before scanning the keypad a second time */
91 ktime_t debounce_delay;
92 ktime_t poll_time;
93 unsigned flags;
94};
95
96/* Directly connected inputs and outputs */
97
98enum gpio_event_direct_flags {
99 GPIOEDF_ACTIVE_HIGH = 1U << 0,
100/* GPIOEDF_USE_DOWN_IRQ = 1U << 1, */
101/* GPIOEDF_USE_IRQ = (1U << 2) | GPIOIDF_USE_DOWN_IRQ, */
102 GPIOEDF_PRINT_KEYS = 1U << 8,
103 GPIOEDF_PRINT_KEY_DEBOUNCE = 1U << 9,
104 GPIOEDF_PRINT_KEY_UNSTABLE = 1U << 10,
105};
106
107struct gpio_event_direct_entry {
108 uint32_t gpio:16;
109 uint32_t code:10;
110 uint32_t dev:6;
111};
112
113/* inputs */
114extern int gpio_event_input_func(struct gpio_event_input_devs *input_devs,
115 struct gpio_event_info *info, void **data, int func);
116struct gpio_event_input_info {
117 /* initialize to gpio_event_input_func */
118 struct gpio_event_info info;
119 ktime_t debounce_time;
120 ktime_t poll_time;
121 uint16_t flags;
122 uint16_t type;
123 const struct gpio_event_direct_entry *keymap;
124 size_t keymap_size;
125};
126
127/* outputs */
128extern int gpio_event_output_func(struct gpio_event_input_devs *input_devs,
129 struct gpio_event_info *info, void **data, int func);
130extern int gpio_event_output_event(struct gpio_event_input_devs *input_devs,
131 struct gpio_event_info *info, void **data,
132 unsigned int dev, unsigned int type,
133 unsigned int code, int value);
134struct gpio_event_output_info {
135 /* initialize to gpio_event_output_func and gpio_event_output_event */
136 struct gpio_event_info info;
137 uint16_t flags;
138 uint16_t type;
139 const struct gpio_event_direct_entry *keymap;
140 size_t keymap_size;
141};
142
143
144/* axes */
145
146enum gpio_event_axis_flags {
147 GPIOEAF_PRINT_UNKNOWN_DIRECTION = 1U << 16,
148 GPIOEAF_PRINT_RAW = 1U << 17,
149 GPIOEAF_PRINT_EVENT = 1U << 18,
150};
151
152extern int gpio_event_axis_func(struct gpio_event_input_devs *input_devs,
153 struct gpio_event_info *info, void **data, int func);
154struct gpio_event_axis_info {
155 /* initialize to gpio_event_axis_func */
156 struct gpio_event_info info;
157 uint8_t count; /* number of gpios for this axis */
158 uint8_t dev; /* device index when using multiple input devices */
159 uint8_t type; /* EV_REL or EV_ABS */
160 uint16_t code;
161 uint16_t decoded_size;
162 uint16_t (*map)(struct gpio_event_axis_info *info, uint16_t in);
163 uint32_t *gpio;
164 uint32_t flags;
165};
166#define gpio_axis_2bit_gray_map gpio_axis_4bit_gray_map
167#define gpio_axis_3bit_gray_map gpio_axis_4bit_gray_map
168uint16_t gpio_axis_4bit_gray_map(
169 struct gpio_event_axis_info *info, uint16_t in);
170uint16_t gpio_axis_5bit_singletrack_map(
171 struct gpio_event_axis_info *info, uint16_t in);
172
173#endif