1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
|
/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
* Copyright (c) 2021, Liav A. <liavalb@hotmail.co.il>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <AK/ByteBuffer.h>
#include <AK/Singleton.h>
#include <AK/Types.h>
#include <Kernel/Debug.h>
#include <Kernel/Devices/HID/HIDManagement.h>
#include <Kernel/Devices/HID/PS2KeyboardDevice.h>
#include <Kernel/IO.h>
#include <Kernel/Sections.h>
#include <Kernel/TTY/ConsoleManagement.h>
#include <Kernel/WorkQueue.h>
namespace Kernel {
#define IRQ_KEYBOARD 1
void PS2KeyboardDevice::irq_handle_byte_read(u8 byte)
{
u8 ch = byte & 0x7f;
bool pressed = !(byte & 0x80);
m_entropy_source.add_random_event(byte);
if (byte == 0xe0) {
m_has_e0_prefix = true;
return;
}
if ((m_modifiers == (Mod_Alt | Mod_Shift) || m_modifiers == (Mod_Ctrl | Mod_Alt | Mod_Shift)) && byte == 0x58) {
// Alt+Shift+F12 pressed, dump some kernel state to the debug console.
ConsoleManagement::the().switch_to_debug();
Scheduler::dump_scheduler_state(m_modifiers == (Mod_Ctrl | Mod_Alt | Mod_Shift));
}
dbgln_if(KEYBOARD_DEBUG, "Keyboard::irq_handle_byte_read: {:#02x} {}", ch, (pressed ? "down" : "up"));
switch (ch) {
case 0x38:
if (m_has_e0_prefix)
update_modifier(Mod_AltGr, pressed);
else
update_modifier(Mod_Alt, pressed);
break;
case 0x1d:
update_modifier(Mod_Ctrl, pressed);
break;
case 0x5b:
update_modifier(Mod_Super, pressed);
break;
case 0x2a:
case 0x36:
if (m_both_shift_keys_pressed)
m_both_shift_keys_pressed = false;
else if ((m_modifiers & Mod_Shift) != 0 && pressed)
m_both_shift_keys_pressed = true;
else
update_modifier(Mod_Shift, pressed);
break;
}
switch (ch) {
case I8042_ACK:
break;
default:
if ((m_modifiers & Mod_Alt) != 0 && ch >= 2 && ch <= ConsoleManagement::s_max_virtual_consoles + 1) {
g_io_work->queue([ch]() {
ConsoleManagement::the().switch_to(ch - 0x02);
});
}
key_state_changed(ch, pressed);
}
}
bool PS2KeyboardDevice::handle_irq(const RegisterState&)
{
// The controller will read the data and call irq_handle_byte_read
// for the appropriate device
return m_i8042_controller->irq_process_input_buffer(HIDDevice::Type::Keyboard);
}
UNMAP_AFTER_INIT RefPtr<PS2KeyboardDevice> PS2KeyboardDevice::try_to_initialize(const I8042Controller& ps2_controller)
{
auto device = adopt_ref(*new PS2KeyboardDevice(ps2_controller));
if (device->initialize())
return device;
return nullptr;
}
UNMAP_AFTER_INIT bool PS2KeyboardDevice::initialize()
{
if (!m_i8042_controller->reset_device(HIDDevice::Type::Keyboard)) {
dbgln("KeyboardDevice: I8042 controller failed to reset device");
return false;
}
return true;
}
// FIXME: UNMAP_AFTER_INIT might not be correct, because in practice PS/2 devices
// are hot pluggable.
UNMAP_AFTER_INIT PS2KeyboardDevice::PS2KeyboardDevice(const I8042Controller& ps2_controller)
: IRQHandler(IRQ_KEYBOARD)
, KeyboardDevice()
, I8042Device(ps2_controller)
{
}
// FIXME: UNMAP_AFTER_INIT might not be correct, because in practice PS/2 devices
// are hot pluggable.
UNMAP_AFTER_INIT PS2KeyboardDevice::~PS2KeyboardDevice()
{
}
}
|
