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
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
|
#include <string.h>
#include <idt.h>
#include <nullfs.h>
#include <thread.h>
#include <dev/pckbd.h>
#include <proto/keyboard.h>
#define PCKBD_BUF_LEN 16
kbd_event_t pckbd_buf[PCKBD_BUF_LEN];
int pckbd_buf_used = 0;
bool pckbd_escaped = false;
void irq1_handler(registers_t *regs) {
uint8_t scancode = inb(0x60);
if (scancode == 0xE0) {
pckbd_escaped = true;
} else {
kbd_event_t ev;
if (scancode & 0x80) {
if (pckbd_escaped) {
ev.scancode = scancode;
ev.type = KBD_EVENT_KEYRELEASE;
} else {
ev.scancode = scancode & 0x7F;
ev.type = KBD_EVENT_KEYRELEASE;
}
} else {
if (pckbd_escaped) {
ev.scancode = scancode | 0x80;
ev.type = KBD_EVENT_KEYPRESS;
} else {
ev.scancode = scancode;
ev.type = KBD_EVENT_KEYPRESS;
}
}
if (pckbd_buf_used < PCKBD_BUF_LEN) {
pckbd_buf[pckbd_buf_used++] = ev;
resume_on(&pckbd_buf);
}
pckbd_escaped = false;
}
}
// ---- VFS operations
bool pckbd_open(fs_node_t *n, int mode);
size_t pckbd_read(fs_handle_t *h, size_t offset, size_t len, char *buf);
int pckbd_poll(fs_handle_t *h, void** out_wait_obj);
void pckbd_close(fs_handle_t *h);
int pckbd_ioctl(fs_handle_t *h, int command, void* data);
bool pckbd_stat(fs_node_t *n, stat_t *st);
fs_node_ops_t pckbd_ops = {
.open = pckbd_open,
.read = pckbd_read,
.write = 0,
.readdir = 0,
.poll = pckbd_poll,
.close = pckbd_close,
.ioctl = pckbd_ioctl,
.stat = pckbd_stat,
.walk = 0,
.delete = 0,
.move = 0,
.create = 0,
.dispose = 0,
};
void pckbd_setup(fs_t *iofs) {
idt_set_irq_handler(IRQ1, &irq1_handler);
nullfs_add_node(iofs, "/input/pckbd", 0, &pckbd_ops, 0);
}
bool pckbd_open(fs_node_t *n, int mode) {
return (mode == FM_READ);
}
size_t pckbd_read(fs_handle_t *h, size_t offset, size_t len, char *buf) {
int ret = 0;
int st = enter_critical(CL_NOINT);
while (len - ret >= sizeof(kbd_event_t) && pckbd_buf_used > 0) {
memcpy(buf + ret, &pckbd_buf[0], sizeof(kbd_event_t));
for (int i = 1; i < pckbd_buf_used; i++) {
pckbd_buf[i-1] = pckbd_buf[i];
}
pckbd_buf_used--;
ret += sizeof(kbd_event_t);
}
exit_critical(st);
return ret;
}
int pckbd_poll(fs_handle_t *h, void** out_wait_obj) {
if (out_wait_obj) *out_wait_obj = &pckbd_buf;
return (pckbd_buf_used > 0 ? SEL_READ : 0);
}
void pckbd_close(fs_handle_t *h) {
return; // nothing to do
}
int pckbd_ioctl(fs_handle_t *h, int command, void* data) {
if (command == IOCTL_KBD_SET_LEDS) {
uint8_t leds = (uint32_t)data & 0x07;
outb(0x60, leds);
return 1;
}
return 0;
}
bool pckbd_stat(fs_node_t *n, stat_t *st) {
st->type = FT_CHARDEV;
st->size = 0;
st->access = FM_READ;
return true;
}
/* vim: set ts=4 sw=4 tw=0 noet :*/
|
