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![Hans de Goede](/assets/img/avatar_default.png)
Add a new helper function to copy absinfo from one input_dev to another input_dev. This is useful to e.g. setup a pen/stylus input-device for combined touchscreen/pen hardware where the pen uses the same coordinates as the touchscreen. Suggested-by: Dmitry Torokhov <dmitry.torokhov@gmail.com> Signed-off-by: Hans de Goede <hdegoede@redhat.com> Link: https://lore.kernel.org/r/20220131143539.109142-2-hdegoede@redhat.com Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
580 lines
20 KiB
C
580 lines
20 KiB
C
/* 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
|
|
* function to set the expected event rate. This will allow handlers
|
|
* to set up an appropriate buffer size for the event stream, in order
|
|
* to minimize information loss.
|
|
*/
|
|
static inline void input_set_events_per_packet(struct input_dev *dev, int n_events)
|
|
{
|
|
dev->hint_events_per_packet = n_events;
|
|
}
|
|
|
|
void input_alloc_absinfo(struct input_dev *dev);
|
|
void input_set_abs_params(struct input_dev *dev, unsigned int axis,
|
|
int min, int max, int fuzz, int flat);
|
|
void input_copy_abs(struct input_dev *dst, unsigned int dst_axis,
|
|
const struct input_dev *src, unsigned int src_axis);
|
|
|
|
#define INPUT_GENERATE_ABS_ACCESSORS(_suffix, _item) \
|
|
static inline int input_abs_get_##_suffix(struct input_dev *dev, \
|
|
unsigned int axis) \
|
|
{ \
|
|
return dev->absinfo ? dev->absinfo[axis]._item : 0; \
|
|
} \
|
|
\
|
|
static inline void input_abs_set_##_suffix(struct input_dev *dev, \
|
|
unsigned int axis, int val) \
|
|
{ \
|
|
input_alloc_absinfo(dev); \
|
|
if (dev->absinfo) \
|
|
dev->absinfo[axis]._item = val; \
|
|
}
|
|
|
|
INPUT_GENERATE_ABS_ACCESSORS(val, value)
|
|
INPUT_GENERATE_ABS_ACCESSORS(min, minimum)
|
|
INPUT_GENERATE_ABS_ACCESSORS(max, maximum)
|
|
INPUT_GENERATE_ABS_ACCESSORS(fuzz, fuzz)
|
|
INPUT_GENERATE_ABS_ACCESSORS(flat, flat)
|
|
INPUT_GENERATE_ABS_ACCESSORS(res, resolution)
|
|
|
|
int input_scancode_to_scalar(const struct input_keymap_entry *ke,
|
|
unsigned int *scancode);
|
|
|
|
int input_get_keycode(struct input_dev *dev, struct input_keymap_entry *ke);
|
|
int input_set_keycode(struct input_dev *dev,
|
|
const struct input_keymap_entry *ke);
|
|
|
|
bool input_match_device_id(const struct input_dev *dev,
|
|
const struct input_device_id *id);
|
|
|
|
void input_enable_softrepeat(struct input_dev *dev, int delay, int period);
|
|
|
|
bool input_device_enabled(struct input_dev *dev);
|
|
|
|
extern struct class input_class;
|
|
|
|
/**
|
|
* struct ff_device - force-feedback part of an input device
|
|
* @upload: Called to upload an new effect into device
|
|
* @erase: Called to erase an effect from device
|
|
* @playback: Called to request device to start playing specified effect
|
|
* @set_gain: Called to set specified gain
|
|
* @set_autocenter: Called to auto-center device
|
|
* @destroy: called by input core when parent input device is being
|
|
* destroyed
|
|
* @private: driver-specific data, will be freed automatically
|
|
* @ffbit: bitmap of force feedback capabilities truly supported by
|
|
* device (not emulated like ones in input_dev->ffbit)
|
|
* @mutex: mutex for serializing access to the device
|
|
* @max_effects: maximum number of effects supported by device
|
|
* @effects: pointer to an array of effects currently loaded into device
|
|
* @effect_owners: array of effect owners; when file handle owning
|
|
* an effect gets closed the effect is automatically erased
|
|
*
|
|
* Every force-feedback device must implement upload() and playback()
|
|
* methods; erase() is optional. set_gain() and set_autocenter() need
|
|
* only be implemented if driver sets up FF_GAIN and FF_AUTOCENTER
|
|
* bits.
|
|
*
|
|
* Note that playback(), set_gain() and set_autocenter() are called with
|
|
* dev->event_lock spinlock held and interrupts off and thus may not
|
|
* sleep.
|
|
*/
|
|
struct ff_device {
|
|
int (*upload)(struct input_dev *dev, struct ff_effect *effect,
|
|
struct ff_effect *old);
|
|
int (*erase)(struct input_dev *dev, int effect_id);
|
|
|
|
int (*playback)(struct input_dev *dev, int effect_id, int value);
|
|
void (*set_gain)(struct input_dev *dev, u16 gain);
|
|
void (*set_autocenter)(struct input_dev *dev, u16 magnitude);
|
|
|
|
void (*destroy)(struct ff_device *);
|
|
|
|
void *private;
|
|
|
|
unsigned long ffbit[BITS_TO_LONGS(FF_CNT)];
|
|
|
|
struct mutex mutex;
|
|
|
|
int max_effects;
|
|
struct ff_effect *effects;
|
|
struct file *effect_owners[];
|
|
};
|
|
|
|
int input_ff_create(struct input_dev *dev, unsigned int max_effects);
|
|
void input_ff_destroy(struct input_dev *dev);
|
|
|
|
int input_ff_event(struct input_dev *dev, unsigned int type, unsigned int code, int value);
|
|
|
|
int input_ff_upload(struct input_dev *dev, struct ff_effect *effect, struct file *file);
|
|
int input_ff_erase(struct input_dev *dev, int effect_id, struct file *file);
|
|
int input_ff_flush(struct input_dev *dev, struct file *file);
|
|
|
|
int input_ff_create_memless(struct input_dev *dev, void *data,
|
|
int (*play_effect)(struct input_dev *, void *, struct ff_effect *));
|
|
|
|
#endif
|