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a407235bf2
Now that the SPDX tag is in all drivers/staging/speakup/ files, that identifies the license in a specific and legally-defined manner. So the extra GPL text wording can be removed as it is no longer needed at all. This is done on a quest to remove the 700+ different ways that files in the kernel describe the GPL license text. And there's unneeded stuff like the address (sometimes incorrect) for the FSF which is never needed. No copyright headers or other non-license-description text was removed. Cc: William Hubbs <w.d.hubbs@gmail.com> Cc: Chris Brannon <chris@the-brannons.com> Cc: Kirk Reiser <kirk@reisers.ca> Cc: Samuel Thibault <samuel.thibault@ens-lyon.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
87 lines
1.8 KiB
C
87 lines
1.8 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/* fakekey.c
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* Functions for simulating keypresses.
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*
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* Copyright (C) 2010 the Speakup Team
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*/
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#include <linux/types.h>
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#include <linux/slab.h>
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#include <linux/preempt.h>
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#include <linux/percpu.h>
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#include <linux/input.h>
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#include "speakup.h"
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#define PRESSED 1
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#define RELEASED 0
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static DEFINE_PER_CPU(int, reporting_keystroke);
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static struct input_dev *virt_keyboard;
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int speakup_add_virtual_keyboard(void)
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{
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int err;
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virt_keyboard = input_allocate_device();
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if (!virt_keyboard)
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return -ENOMEM;
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virt_keyboard->name = "Speakup";
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virt_keyboard->id.bustype = BUS_VIRTUAL;
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virt_keyboard->phys = "speakup/input0";
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virt_keyboard->dev.parent = NULL;
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__set_bit(EV_KEY, virt_keyboard->evbit);
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__set_bit(KEY_DOWN, virt_keyboard->keybit);
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err = input_register_device(virt_keyboard);
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if (err) {
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input_free_device(virt_keyboard);
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virt_keyboard = NULL;
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}
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return err;
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}
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void speakup_remove_virtual_keyboard(void)
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{
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if (virt_keyboard) {
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input_unregister_device(virt_keyboard);
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virt_keyboard = NULL;
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}
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}
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/*
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* Send a simulated down-arrow to the application.
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*/
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void speakup_fake_down_arrow(void)
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{
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unsigned long flags;
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/* disable keyboard interrupts */
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local_irq_save(flags);
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/* don't change CPU */
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preempt_disable();
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__this_cpu_write(reporting_keystroke, true);
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input_report_key(virt_keyboard, KEY_DOWN, PRESSED);
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input_report_key(virt_keyboard, KEY_DOWN, RELEASED);
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input_sync(virt_keyboard);
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__this_cpu_write(reporting_keystroke, false);
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/* reenable preemption */
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preempt_enable();
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/* reenable keyboard interrupts */
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local_irq_restore(flags);
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}
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/*
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* Are we handling a simulated keypress on the current CPU?
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* Returns a boolean.
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*/
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bool speakup_fake_key_pressed(void)
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{
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return this_cpu_read(reporting_keystroke);
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}
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