release/src-rt-6.x.4708/linux/linux-2.6.36/drivers/staging/dream/include/linux/gpio_event.h

   1 /* drivers/staging/dream/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
  21 enum {
  22         GPIO_EVENT_FUNC_UNINIT  = 0x0,
  23         GPIO_EVENT_FUNC_INIT    = 0x1,
  24         GPIO_EVENT_FUNC_SUSPEND = 0x2,
  25         GPIO_EVENT_FUNC_RESUME  = 0x3,
  26 };
  27 struct gpio_event_info {
  28         int (*func)(struct input_dev *input_dev,
  29                     struct gpio_event_info *info,
  30                     void **data, int func);
  31         int (*event)(struct input_dev *input_dev,
  32                      struct gpio_event_info *info,
  33                      void **data, unsigned int type,
  34                      unsigned int code, int value); /* out events */
  35 };
  36
  37 struct gpio_event_platform_data {
  38         const char *name;
  39         struct gpio_event_info **info;
  40         size_t info_count;
  41         int (*power)(const struct gpio_event_platform_data *pdata, bool on);
  42 };
  43
  44 #define GPIO_EVENT_DEV_NAME "gpio-event"
  45
  46 /* Key matrix */
  47
  48 enum gpio_event_matrix_flags {
  49         /* unset: drive active output low, set: drive active output high */
  50         GPIOKPF_ACTIVE_HIGH              = 1U << 0,
  51         GPIOKPF_DEBOUNCE                 = 1U << 1,
  52         GPIOKPF_REMOVE_SOME_PHANTOM_KEYS = 1U << 2,
  53         GPIOKPF_REMOVE_PHANTOM_KEYS      = GPIOKPF_REMOVE_SOME_PHANTOM_KEYS |
  54                                            GPIOKPF_DEBOUNCE,
  55         GPIOKPF_DRIVE_INACTIVE           = 1U << 3,
  56         GPIOKPF_LEVEL_TRIGGERED_IRQ      = 1U << 4,
  57         GPIOKPF_PRINT_UNMAPPED_KEYS      = 1U << 16,
  58         GPIOKPF_PRINT_MAPPED_KEYS        = 1U << 17,
  59         GPIOKPF_PRINT_PHANTOM_KEYS       = 1U << 18,
  60 };
  61
  62 extern int gpio_event_matrix_func(struct input_dev *input_dev,
  63                         struct gpio_event_info *info, void **data, int func);
  64 struct gpio_event_matrix_info {
  65         /* initialize to gpio_event_matrix_func */
  66         struct gpio_event_info info;
  67         /* size must be ninputs * noutputs */
  68         const unsigned short *keymap;
  69         unsigned int *input_gpios;
  70         unsigned int *output_gpios;
  71         unsigned int ninputs;
  72         unsigned int noutputs;
  73         /* time to wait before reading inputs after driving each output */
  74         ktime_t settle_time;
  75         /* time to wait before scanning the keypad a second time */
  76         ktime_t debounce_delay;
  77         ktime_t poll_time;
  78         unsigned flags;
  79 };
  80
  81 /* Directly connected inputs and outputs */
  82
  83 enum gpio_event_direct_flags {
  84         GPIOEDF_ACTIVE_HIGH         = 1U << 0,
  85 /*      GPIOEDF_USE_DOWN_IRQ        = 1U << 1, */
  86 /*      GPIOEDF_USE_IRQ             = (1U << 2) | GPIOIDF_USE_DOWN_IRQ, */
  87         GPIOEDF_PRINT_KEYS          = 1U << 8,
  88         GPIOEDF_PRINT_KEY_DEBOUNCE  = 1U << 9,
  89 };
  90
  91 struct gpio_event_direct_entry {
  92         uint32_t gpio:23;
  93         uint32_t code:9;
  94 };
  95
  96 /* inputs */
  97 extern int gpio_event_input_func(struct input_dev *input_dev,
  98                         struct gpio_event_info *info, void **data, int func);
  99 struct gpio_event_input_info {
 100         /* initialize to gpio_event_input_func */
 101         struct gpio_event_info info;
 102         ktime_t debounce_time;
 103         ktime_t poll_time;
 104         uint16_t flags;
 105         uint16_t type;
 106         const struct gpio_event_direct_entry *keymap;
 107         size_t keymap_size;
 108 };
 109
 110 /* outputs */
 111 extern int gpio_event_output_func(struct input_dev *input_dev,
 112                         struct gpio_event_info *info, void **data, int func);
 113 extern int gpio_event_output_event(struct input_dev *input_dev,
 114                         struct gpio_event_info *info, void **data,
 115                         unsigned int type, unsigned int code, int value);
 116 struct gpio_event_output_info {
 117         /* initialize to gpio_event_output_func and gpio_event_output_event */
 118         struct gpio_event_info info;
 119         uint16_t flags;
 120         uint16_t type;
 121         const struct gpio_event_direct_entry *keymap;
 122         size_t keymap_size;
 123 };
 124
 125
 126 /* axes */
 127
 128 enum gpio_event_axis_flags {
 129         GPIOEAF_PRINT_UNKNOWN_DIRECTION  = 1U << 16,
 130         GPIOEAF_PRINT_RAW                = 1U << 17,
 131         GPIOEAF_PRINT_EVENT              = 1U << 18,
 132 };
 133
 134 extern int gpio_event_axis_func(struct input_dev *input_dev,
 135                         struct gpio_event_info *info, void **data, int func);
 136 struct gpio_event_axis_info {
 137         /* initialize to gpio_event_axis_func */
 138         struct gpio_event_info info;
 139         uint8_t  count;
 140         uint8_t  type; /* EV_REL or EV_ABS */
 141         uint16_t code;
 142         uint16_t decoded_size;
 143         uint16_t (*map)(struct gpio_event_axis_info *info, uint16_t in);
 144         uint32_t *gpio;
 145         uint32_t flags;
 146 };
 147 #define gpio_axis_2bit_gray_map gpio_axis_4bit_gray_map
 148 #define gpio_axis_3bit_gray_map gpio_axis_4bit_gray_map
 149 uint16_t gpio_axis_4bit_gray_map(
 150                         struct gpio_event_axis_info *info, uint16_t in);
 151 uint16_t gpio_axis_5bit_singletrack_map(
 152                         struct gpio_event_axis_info *info, uint16_t in);
 153
 154 #endif