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git.proxmox.com Git - mirror_ubuntu-artful-kernel.git/blob - drivers/staging/speakup/fakekey.c
2 * Functions for simulating keypresses.
4 * Copyright (C) 2010 the Speakup Team
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20 #include <linux/types.h>
21 #include <linux/slab.h>
22 #include <linux/preempt.h>
23 #include <linux/percpu.h>
24 #include <linux/input.h>
31 DEFINE_PER_CPU(bool, reporting_keystroke
);
33 static struct input_dev
*virt_keyboard
;
35 int speakup_add_virtual_keyboard(void)
39 virt_keyboard
= input_allocate_device();
44 virt_keyboard
->name
= "Speakup";
45 virt_keyboard
->id
.bustype
= BUS_VIRTUAL
;
46 virt_keyboard
->phys
= "speakup/input0";
47 virt_keyboard
->dev
.parent
= NULL
;
49 __set_bit(EV_KEY
, virt_keyboard
->evbit
);
50 __set_bit(KEY_DOWN
, virt_keyboard
->keybit
);
52 err
= input_register_device(virt_keyboard
);
54 input_free_device(virt_keyboard
);
61 void speakup_remove_virtual_keyboard(void)
63 if (virt_keyboard
!= NULL
) {
64 input_unregister_device(virt_keyboard
);
70 * Send a simulated down-arrow to the application.
72 void speakup_fake_down_arrow(void)
76 /* disable keyboard interrupts */
77 local_irq_save(flags
);
78 /* don't change CPU */
81 __get_cpu_var(reporting_keystroke
) = true;
82 input_report_key(virt_keyboard
, KEY_DOWN
, PRESSED
);
83 input_report_key(virt_keyboard
, KEY_DOWN
, RELEASED
);
84 __get_cpu_var(reporting_keystroke
) = false;
86 /* reenable preemption */
88 /* reenable keyboard interrupts */
89 local_irq_restore(flags
);
93 * Are we handling a simulated keypress on the current CPU?
96 bool speakup_fake_key_pressed(void)
100 is_pressed
= get_cpu_var(reporting_keystroke
);
101 put_cpu_var(reporting_keystroke
);