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578 lines
20 KiB
578 lines
20 KiB
/* SPDX-License-Identifier: GPL-2.0-only */ |
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/* |
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* Copyright (c) 1999-2002 Vojtech Pavlik |
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*/ |
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#ifndef _INPUT_H |
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#define _INPUT_H |
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#include <linux/time.h> |
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#include <linux/list.h> |
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#include <uapi/linux/input.h> |
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/* Implementation details, userspace should not care about these */ |
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#define ABS_MT_FIRST ABS_MT_TOUCH_MAJOR |
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#define ABS_MT_LAST ABS_MT_TOOL_Y |
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/* |
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* In-kernel definitions. |
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*/ |
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#include <linux/device.h> |
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#include <linux/fs.h> |
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#include <linux/timer.h> |
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#include <linux/mod_devicetable.h> |
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struct input_dev_poller; |
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/** |
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* struct input_value - input value representation |
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* @type: type of value (EV_KEY, EV_ABS, etc) |
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* @code: the value code |
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* @value: the value |
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*/ |
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struct input_value { |
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__u16 type; |
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__u16 code; |
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__s32 value; |
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}; |
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enum input_clock_type { |
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INPUT_CLK_REAL = 0, |
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INPUT_CLK_MONO, |
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INPUT_CLK_BOOT, |
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INPUT_CLK_MAX |
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}; |
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/** |
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* struct input_dev - represents an input device |
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* @name: name of the device |
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* @phys: physical path to the device in the system hierarchy |
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* @uniq: unique identification code for the device (if device has it) |
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* @id: id of the device (struct input_id) |
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* @propbit: bitmap of device properties and quirks |
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* @evbit: bitmap of types of events supported by the device (EV_KEY, |
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* EV_REL, etc.) |
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* @keybit: bitmap of keys/buttons this device has |
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* @relbit: bitmap of relative axes for the device |
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* @absbit: bitmap of absolute axes for the device |
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* @mscbit: bitmap of miscellaneous events supported by the device |
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* @ledbit: bitmap of leds present on the device |
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* @sndbit: bitmap of sound effects supported by the device |
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* @ffbit: bitmap of force feedback effects supported by the device |
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* @swbit: bitmap of switches present on the device |
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* @hint_events_per_packet: average number of events generated by the |
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* device in a packet (between EV_SYN/SYN_REPORT events). Used by |
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* event handlers to estimate size of the buffer needed to hold |
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* events. |
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* @keycodemax: size of keycode table |
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* @keycodesize: size of elements in keycode table |
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* @keycode: map of scancodes to keycodes for this device |
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* @getkeycode: optional legacy method to retrieve current keymap. |
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* @setkeycode: optional method to alter current keymap, used to implement |
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* sparse keymaps. If not supplied default mechanism will be used. |
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* The method is being called while holding event_lock and thus must |
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* not sleep |
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* @ff: force feedback structure associated with the device if device |
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* supports force feedback effects |
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* @poller: poller structure associated with the device if device is |
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* set up to use polling mode |
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* @repeat_key: stores key code of the last key pressed; used to implement |
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* software autorepeat |
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* @timer: timer for software autorepeat |
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* @rep: current values for autorepeat parameters (delay, rate) |
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* @mt: pointer to multitouch state |
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* @absinfo: array of &struct input_absinfo elements holding information |
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* about absolute axes (current value, min, max, flat, fuzz, |
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* resolution) |
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* @key: reflects current state of device's keys/buttons |
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* @led: reflects current state of device's LEDs |
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* @snd: reflects current state of sound effects |
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* @sw: reflects current state of device's switches |
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* @open: this method is called when the very first user calls |
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* input_open_device(). The driver must prepare the device |
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* to start generating events (start polling thread, |
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* request an IRQ, submit URB, etc.). The meaning of open() is |
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* to start providing events to the input core. |
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* @close: this method is called when the very last user calls |
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* input_close_device(). The meaning of close() is to stop |
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* providing events to the input core. |
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* @flush: purges the device. Most commonly used to get rid of force |
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* feedback effects loaded into the device when disconnecting |
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* from it |
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* @event: event handler for events sent _to_ the device, like EV_LED |
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* or EV_SND. The device is expected to carry out the requested |
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* action (turn on a LED, play sound, etc.) The call is protected |
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* by @event_lock and must not sleep |
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* @grab: input handle that currently has the device grabbed (via |
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* EVIOCGRAB ioctl). When a handle grabs a device it becomes sole |
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* recipient for all input events coming from the device |
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* @event_lock: this spinlock is taken when input core receives |
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* and processes a new event for the device (in input_event()). |
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* Code that accesses and/or modifies parameters of a device |
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* (such as keymap or absmin, absmax, absfuzz, etc.) after device |
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* has been registered with input core must take this lock. |
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* @mutex: serializes calls to open(), close() and flush() methods |
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* @users: stores number of users (input handlers) that opened this |
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* device. It is used by input_open_device() and input_close_device() |
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* to make sure that dev->open() is only called when the first |
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* user opens device and dev->close() is called when the very |
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* last user closes the device |
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* @going_away: marks devices that are in a middle of unregistering and |
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* causes input_open_device*() fail with -ENODEV. |
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* @dev: driver model's view of this device |
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* @h_list: list of input handles associated with the device. When |
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* accessing the list dev->mutex must be held |
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* @node: used to place the device onto input_dev_list |
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* @num_vals: number of values queued in the current frame |
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* @max_vals: maximum number of values queued in a frame |
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* @vals: array of values queued in the current frame |
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* @devres_managed: indicates that devices is managed with devres framework |
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* and needs not be explicitly unregistered or freed. |
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* @timestamp: storage for a timestamp set by input_set_timestamp called |
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* by a driver |
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* @inhibited: indicates that the input device is inhibited. If that is |
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* the case then input core ignores any events generated by the device. |
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* Device's close() is called when it is being inhibited and its open() |
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* is called when it is being uninhibited. |
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*/ |
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struct input_dev { |
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const char *name; |
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const char *phys; |
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const char *uniq; |
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struct input_id id; |
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unsigned long propbit[BITS_TO_LONGS(INPUT_PROP_CNT)]; |
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unsigned long evbit[BITS_TO_LONGS(EV_CNT)]; |
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unsigned long keybit[BITS_TO_LONGS(KEY_CNT)]; |
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unsigned long relbit[BITS_TO_LONGS(REL_CNT)]; |
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unsigned long absbit[BITS_TO_LONGS(ABS_CNT)]; |
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unsigned long mscbit[BITS_TO_LONGS(MSC_CNT)]; |
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unsigned long ledbit[BITS_TO_LONGS(LED_CNT)]; |
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unsigned long sndbit[BITS_TO_LONGS(SND_CNT)]; |
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unsigned long ffbit[BITS_TO_LONGS(FF_CNT)]; |
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unsigned long swbit[BITS_TO_LONGS(SW_CNT)]; |
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unsigned int hint_events_per_packet; |
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unsigned int keycodemax; |
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unsigned int keycodesize; |
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void *keycode; |
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int (*setkeycode)(struct input_dev *dev, |
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const struct input_keymap_entry *ke, |
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unsigned int *old_keycode); |
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int (*getkeycode)(struct input_dev *dev, |
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struct input_keymap_entry *ke); |
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struct ff_device *ff; |
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struct input_dev_poller *poller; |
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unsigned int repeat_key; |
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struct timer_list timer; |
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int rep[REP_CNT]; |
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struct input_mt *mt; |
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struct input_absinfo *absinfo; |
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unsigned long key[BITS_TO_LONGS(KEY_CNT)]; |
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unsigned long led[BITS_TO_LONGS(LED_CNT)]; |
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unsigned long snd[BITS_TO_LONGS(SND_CNT)]; |
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unsigned long sw[BITS_TO_LONGS(SW_CNT)]; |
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int (*open)(struct input_dev *dev); |
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void (*close)(struct input_dev *dev); |
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int (*flush)(struct input_dev *dev, struct file *file); |
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int (*event)(struct input_dev *dev, unsigned int type, unsigned int code, int value); |
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struct input_handle __rcu *grab; |
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spinlock_t event_lock; |
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struct mutex mutex; |
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unsigned int users; |
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bool going_away; |
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struct device dev; |
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struct list_head h_list; |
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struct list_head node; |
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unsigned int num_vals; |
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unsigned int max_vals; |
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struct input_value *vals; |
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bool devres_managed; |
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ktime_t timestamp[INPUT_CLK_MAX]; |
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bool inhibited; |
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}; |
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#define to_input_dev(d) container_of(d, struct input_dev, dev) |
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/* |
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* Verify that we are in sync with input_device_id mod_devicetable.h #defines |
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*/ |
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#if EV_MAX != INPUT_DEVICE_ID_EV_MAX |
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#error "EV_MAX and INPUT_DEVICE_ID_EV_MAX do not match" |
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#endif |
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#if KEY_MIN_INTERESTING != INPUT_DEVICE_ID_KEY_MIN_INTERESTING |
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#error "KEY_MIN_INTERESTING and INPUT_DEVICE_ID_KEY_MIN_INTERESTING do not match" |
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#endif |
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#if KEY_MAX != INPUT_DEVICE_ID_KEY_MAX |
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#error "KEY_MAX and INPUT_DEVICE_ID_KEY_MAX do not match" |
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#endif |
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#if REL_MAX != INPUT_DEVICE_ID_REL_MAX |
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#error "REL_MAX and INPUT_DEVICE_ID_REL_MAX do not match" |
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#endif |
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#if ABS_MAX != INPUT_DEVICE_ID_ABS_MAX |
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#error "ABS_MAX and INPUT_DEVICE_ID_ABS_MAX do not match" |
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#endif |
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#if MSC_MAX != INPUT_DEVICE_ID_MSC_MAX |
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#error "MSC_MAX and INPUT_DEVICE_ID_MSC_MAX do not match" |
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#endif |
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#if LED_MAX != INPUT_DEVICE_ID_LED_MAX |
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#error "LED_MAX and INPUT_DEVICE_ID_LED_MAX do not match" |
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#endif |
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#if SND_MAX != INPUT_DEVICE_ID_SND_MAX |
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#error "SND_MAX and INPUT_DEVICE_ID_SND_MAX do not match" |
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#endif |
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#if FF_MAX != INPUT_DEVICE_ID_FF_MAX |
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#error "FF_MAX and INPUT_DEVICE_ID_FF_MAX do not match" |
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#endif |
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#if SW_MAX != INPUT_DEVICE_ID_SW_MAX |
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#error "SW_MAX and INPUT_DEVICE_ID_SW_MAX do not match" |
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#endif |
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#if INPUT_PROP_MAX != INPUT_DEVICE_ID_PROP_MAX |
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#error "INPUT_PROP_MAX and INPUT_DEVICE_ID_PROP_MAX do not match" |
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#endif |
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#define INPUT_DEVICE_ID_MATCH_DEVICE \ |
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(INPUT_DEVICE_ID_MATCH_BUS | INPUT_DEVICE_ID_MATCH_VENDOR | INPUT_DEVICE_ID_MATCH_PRODUCT) |
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#define INPUT_DEVICE_ID_MATCH_DEVICE_AND_VERSION \ |
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(INPUT_DEVICE_ID_MATCH_DEVICE | INPUT_DEVICE_ID_MATCH_VERSION) |
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struct input_handle; |
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/** |
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* struct input_handler - implements one of interfaces for input devices |
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* @private: driver-specific data |
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* @event: event handler. This method is being called by input core with |
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* interrupts disabled and dev->event_lock spinlock held and so |
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* it may not sleep |
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* @events: event sequence handler. This method is being called by |
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* input core with interrupts disabled and dev->event_lock |
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* spinlock held and so it may not sleep |
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* @filter: similar to @event; separates normal event handlers from |
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* "filters". |
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* @match: called after comparing device's id with handler's id_table |
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* to perform fine-grained matching between device and handler |
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* @connect: called when attaching a handler to an input device |
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* @disconnect: disconnects a handler from input device |
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* @start: starts handler for given handle. This function is called by |
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* input core right after connect() method and also when a process |
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* that "grabbed" a device releases it |
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* @legacy_minors: set to %true by drivers using legacy minor ranges |
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* @minor: beginning of range of 32 legacy minors for devices this driver |
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* can provide |
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* @name: name of the handler, to be shown in /proc/bus/input/handlers |
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* @id_table: pointer to a table of input_device_ids this driver can |
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* handle |
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* @h_list: list of input handles associated with the handler |
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* @node: for placing the driver onto input_handler_list |
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* |
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* Input handlers attach to input devices and create input handles. There |
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* are likely several handlers attached to any given input device at the |
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* same time. All of them will get their copy of input event generated by |
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* the device. |
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* |
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* The very same structure is used to implement input filters. Input core |
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* allows filters to run first and will not pass event to regular handlers |
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* if any of the filters indicate that the event should be filtered (by |
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* returning %true from their filter() method). |
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* |
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* Note that input core serializes calls to connect() and disconnect() |
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* methods. |
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*/ |
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struct input_handler { |
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void *private; |
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void (*event)(struct input_handle *handle, unsigned int type, unsigned int code, int value); |
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void (*events)(struct input_handle *handle, |
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const struct input_value *vals, unsigned int count); |
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bool (*filter)(struct input_handle *handle, unsigned int type, unsigned int code, int value); |
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bool (*match)(struct input_handler *handler, struct input_dev *dev); |
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int (*connect)(struct input_handler *handler, struct input_dev *dev, const struct input_device_id *id); |
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void (*disconnect)(struct input_handle *handle); |
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void (*start)(struct input_handle *handle); |
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bool legacy_minors; |
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int minor; |
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const char *name; |
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const struct input_device_id *id_table; |
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struct list_head h_list; |
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struct list_head node; |
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}; |
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/** |
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* struct input_handle - links input device with an input handler |
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* @private: handler-specific data |
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* @open: counter showing whether the handle is 'open', i.e. should deliver |
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* events from its device |
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* @name: name given to the handle by handler that created it |
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* @dev: input device the handle is attached to |
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* @handler: handler that works with the device through this handle |
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* @d_node: used to put the handle on device's list of attached handles |
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* @h_node: used to put the handle on handler's list of handles from which |
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* it gets events |
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*/ |
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struct input_handle { |
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void *private; |
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int open; |
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const char *name; |
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struct input_dev *dev; |
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struct input_handler *handler; |
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struct list_head d_node; |
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struct list_head h_node; |
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}; |
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struct input_dev __must_check *input_allocate_device(void); |
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struct input_dev __must_check *devm_input_allocate_device(struct device *); |
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void input_free_device(struct input_dev *dev); |
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static inline struct input_dev *input_get_device(struct input_dev *dev) |
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{ |
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return dev ? to_input_dev(get_device(&dev->dev)) : NULL; |
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} |
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static inline void input_put_device(struct input_dev *dev) |
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{ |
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if (dev) |
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put_device(&dev->dev); |
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} |
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static inline void *input_get_drvdata(struct input_dev *dev) |
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{ |
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return dev_get_drvdata(&dev->dev); |
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} |
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static inline void input_set_drvdata(struct input_dev *dev, void *data) |
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{ |
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dev_set_drvdata(&dev->dev, data); |
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} |
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int __must_check input_register_device(struct input_dev *); |
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void input_unregister_device(struct input_dev *); |
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void input_reset_device(struct input_dev *); |
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int input_setup_polling(struct input_dev *dev, |
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void (*poll_fn)(struct input_dev *dev)); |
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void input_set_poll_interval(struct input_dev *dev, unsigned int interval); |
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void input_set_min_poll_interval(struct input_dev *dev, unsigned int interval); |
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void input_set_max_poll_interval(struct input_dev *dev, unsigned int interval); |
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int input_get_poll_interval(struct input_dev *dev); |
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int __must_check input_register_handler(struct input_handler *); |
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void input_unregister_handler(struct input_handler *); |
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int __must_check input_get_new_minor(int legacy_base, unsigned int legacy_num, |
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bool allow_dynamic); |
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void input_free_minor(unsigned int minor); |
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int input_handler_for_each_handle(struct input_handler *, void *data, |
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int (*fn)(struct input_handle *, void *)); |
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int input_register_handle(struct input_handle *); |
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void input_unregister_handle(struct input_handle *); |
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int input_grab_device(struct input_handle *); |
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void input_release_device(struct input_handle *); |
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int input_open_device(struct input_handle *); |
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void input_close_device(struct input_handle *); |
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int input_flush_device(struct input_handle *handle, struct file *file); |
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void input_set_timestamp(struct input_dev *dev, ktime_t timestamp); |
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ktime_t *input_get_timestamp(struct input_dev *dev); |
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void input_event(struct input_dev *dev, unsigned int type, unsigned int code, int value); |
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void input_inject_event(struct input_handle *handle, unsigned int type, unsigned int code, int value); |
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static inline void input_report_key(struct input_dev *dev, unsigned int code, int value) |
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{ |
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input_event(dev, EV_KEY, code, !!value); |
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} |
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static inline void input_report_rel(struct input_dev *dev, unsigned int code, int value) |
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{ |
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input_event(dev, EV_REL, code, value); |
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} |
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static inline void input_report_abs(struct input_dev *dev, unsigned int code, int value) |
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{ |
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input_event(dev, EV_ABS, code, value); |
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} |
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static inline void input_report_ff_status(struct input_dev *dev, unsigned int code, int value) |
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{ |
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input_event(dev, EV_FF_STATUS, code, value); |
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} |
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static inline void input_report_switch(struct input_dev *dev, unsigned int code, int value) |
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{ |
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input_event(dev, EV_SW, code, !!value); |
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} |
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static inline void input_sync(struct input_dev *dev) |
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{ |
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input_event(dev, EV_SYN, SYN_REPORT, 0); |
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} |
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static inline void input_mt_sync(struct input_dev *dev) |
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{ |
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input_event(dev, EV_SYN, SYN_MT_REPORT, 0); |
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} |
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void input_set_capability(struct input_dev *dev, unsigned int type, unsigned int code); |
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/** |
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* input_set_events_per_packet - tell handlers about the driver event rate |
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* @dev: the input device used by the driver |
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* @n_events: the average number of events between calls to input_sync() |
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* |
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* If the event rate sent from a device is unusually large, use this |
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* function to set the expected event rate. This will allow handlers |
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* to set up an appropriate buffer size for the event stream, in order |
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* to minimize information loss. |
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*/ |
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static inline void input_set_events_per_packet(struct input_dev *dev, int n_events) |
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{ |
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dev->hint_events_per_packet = n_events; |
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} |
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void input_alloc_absinfo(struct input_dev *dev); |
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void input_set_abs_params(struct input_dev *dev, unsigned int axis, |
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int min, int max, int fuzz, int flat); |
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#define INPUT_GENERATE_ABS_ACCESSORS(_suffix, _item) \ |
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static inline int input_abs_get_##_suffix(struct input_dev *dev, \ |
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unsigned int axis) \ |
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{ \ |
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return dev->absinfo ? dev->absinfo[axis]._item : 0; \ |
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} \ |
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\ |
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static inline void input_abs_set_##_suffix(struct input_dev *dev, \ |
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unsigned int axis, int val) \ |
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{ \ |
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input_alloc_absinfo(dev); \ |
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if (dev->absinfo) \ |
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dev->absinfo[axis]._item = val; \ |
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} |
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INPUT_GENERATE_ABS_ACCESSORS(val, value) |
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INPUT_GENERATE_ABS_ACCESSORS(min, minimum) |
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INPUT_GENERATE_ABS_ACCESSORS(max, maximum) |
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INPUT_GENERATE_ABS_ACCESSORS(fuzz, fuzz) |
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INPUT_GENERATE_ABS_ACCESSORS(flat, flat) |
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INPUT_GENERATE_ABS_ACCESSORS(res, resolution) |
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int input_scancode_to_scalar(const struct input_keymap_entry *ke, |
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unsigned int *scancode); |
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int input_get_keycode(struct input_dev *dev, struct input_keymap_entry *ke); |
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int input_set_keycode(struct input_dev *dev, |
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const struct input_keymap_entry *ke); |
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bool input_match_device_id(const struct input_dev *dev, |
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const struct input_device_id *id); |
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void input_enable_softrepeat(struct input_dev *dev, int delay, int period); |
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bool input_device_enabled(struct input_dev *dev); |
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extern struct class input_class; |
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/** |
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* struct ff_device - force-feedback part of an input device |
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* @upload: Called to upload an new effect into device |
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* @erase: Called to erase an effect from device |
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* @playback: Called to request device to start playing specified effect |
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* @set_gain: Called to set specified gain |
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* @set_autocenter: Called to auto-center device |
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* @destroy: called by input core when parent input device is being |
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* destroyed |
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* @private: driver-specific data, will be freed automatically |
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* @ffbit: bitmap of force feedback capabilities truly supported by |
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* device (not emulated like ones in input_dev->ffbit) |
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* @mutex: mutex for serializing access to the device |
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* @max_effects: maximum number of effects supported by device |
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* @effects: pointer to an array of effects currently loaded into device |
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* @effect_owners: array of effect owners; when file handle owning |
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* an effect gets closed the effect is automatically erased |
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* |
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* Every force-feedback device must implement upload() and playback() |
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* methods; erase() is optional. set_gain() and set_autocenter() need |
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* only be implemented if driver sets up FF_GAIN and FF_AUTOCENTER |
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* bits. |
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* |
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* Note that playback(), set_gain() and set_autocenter() are called with |
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* dev->event_lock spinlock held and interrupts off and thus may not |
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* sleep. |
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*/ |
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struct ff_device { |
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int (*upload)(struct input_dev *dev, struct ff_effect *effect, |
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struct ff_effect *old); |
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int (*erase)(struct input_dev *dev, int effect_id); |
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int (*playback)(struct input_dev *dev, int effect_id, int value); |
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void (*set_gain)(struct input_dev *dev, u16 gain); |
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void (*set_autocenter)(struct input_dev *dev, u16 magnitude); |
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void (*destroy)(struct ff_device *); |
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void *private; |
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unsigned long ffbit[BITS_TO_LONGS(FF_CNT)]; |
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struct mutex mutex; |
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int max_effects; |
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struct ff_effect *effects; |
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struct file *effect_owners[]; |
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}; |
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int input_ff_create(struct input_dev *dev, unsigned int max_effects); |
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void input_ff_destroy(struct input_dev *dev); |
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int input_ff_event(struct input_dev *dev, unsigned int type, unsigned int code, int value); |
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int input_ff_upload(struct input_dev *dev, struct ff_effect *effect, struct file *file); |
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int input_ff_erase(struct input_dev *dev, int effect_id, struct file *file); |
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int input_ff_flush(struct input_dev *dev, struct file *file); |
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int input_ff_create_memless(struct input_dev *dev, void *data, |
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int (*play_effect)(struct input_dev *, void *, struct ff_effect *)); |
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#endif
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