projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| c6e3fd22 WH |
1 | /* fakekey.c |
| 2 | * Functions for simulating keypresses. | |
| 3 | * | |
| 4 | * Copyright (C) 2010 the Speakup Team | |
| 5 | * | |
| 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. | |
| 10 | * | |
| 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. | |
| c6e3fd22 WH |
15 | */ |
| 16 | #include <linux/types.h> | |
| 17 | #include <linux/slab.h> | |
| 18 | #include <linux/preempt.h> | |
| 19 | #include <linux/percpu.h> | |
| 20 | #include <linux/input.h> | |
| 21 | ||
| 22 | #include "speakup.h" | |
| 23 | ||
| 24 | #define PRESSED 1 | |
| 25 | #define RELEASED 0 | |
| 26 | ||
| 911b04d6 | 27 | static DEFINE_PER_CPU(int, reporting_keystroke); |
| c6e3fd22 WH |
28 | |
| 29 | static struct input_dev *virt_keyboard; | |
| 30 | ||
| 31 | int speakup_add_virtual_keyboard(void) | |
| 32 | { | |
| 33 | int err; | |
| 34 | ||
| 35 | virt_keyboard = input_allocate_device(); | |
| 36 | ||
| 37 | if (!virt_keyboard) | |
| 38 | return -ENOMEM; | |
| 39 | ||
| 40 | virt_keyboard->name = "Speakup"; | |
| 41 | virt_keyboard->id.bustype = BUS_VIRTUAL; | |
| 42 | virt_keyboard->phys = "speakup/input0"; | |
| 43 | virt_keyboard->dev.parent = NULL; | |
| 44 | ||
| 45 | __set_bit(EV_KEY, virt_keyboard->evbit); | |
| 46 | __set_bit(KEY_DOWN, virt_keyboard->keybit); | |
| 47 | ||
| 48 | err = input_register_device(virt_keyboard); | |
| 49 | if (err) { | |
| 50 | input_free_device(virt_keyboard); | |
| 51 | virt_keyboard = NULL; | |
| 52 | } | |
| 53 | ||
| 54 | return err; | |
| 55 | } | |
| 56 | ||
| 57 | void speakup_remove_virtual_keyboard(void) | |
| 58 | { | |
| 59 | if (virt_keyboard != NULL) { | |
| 60 | input_unregister_device(virt_keyboard); | |
| c6e3fd22 WH |
61 | virt_keyboard = NULL; |
| 62 | } | |
| 63 | } | |
| 64 | ||
| 65 | /* | |
| 66 | * Send a simulated down-arrow to the application. | |
| 67 | */ | |
| 68 | void speakup_fake_down_arrow(void) | |
| 69 | { | |
| 70 | unsigned long flags; | |
| 71 | ||
| 72 | /* disable keyboard interrupts */ | |
| 73 | local_irq_save(flags); | |
| 74 | /* don't change CPU */ | |
| 75 | preempt_disable(); | |
| 76 | ||
| 4a6f4fe8 | 77 | __this_cpu_write(reporting_keystroke, true); |
| c6e3fd22 WH |
78 | input_report_key(virt_keyboard, KEY_DOWN, PRESSED); |
| 79 | input_report_key(virt_keyboard, KEY_DOWN, RELEASED); | |
| b1d562ac | 80 | input_sync(virt_keyboard); |
| 4a6f4fe8 | 81 | __this_cpu_write(reporting_keystroke, false); |
| c6e3fd22 WH |
82 | |
| 83 | /* reenable preemption */ | |
| 84 | preempt_enable(); | |
| 85 | /* reenable keyboard interrupts */ | |
| 86 | local_irq_restore(flags); | |
| 87 | } | |
| 88 | ||
| 89 | /* | |
| 90 | * Are we handling a simulated keypress on the current CPU? | |
| 91 | * Returns a boolean. | |
| 92 | */ | |
| 93 | bool speakup_fake_key_pressed(void) | |
| 94 | { | |
| 5309665d | 95 | return this_cpu_read(reporting_keystroke); |
| c6e3fd22 | 96 | } |