root / hw / stellaris_input.c @ cc9f28bc
History | View | Annotate | Download (2.2 kB)
1 |
/*
|
---|---|
2 |
* Gamepad style buttons connected to IRQ/GPIO lines
|
3 |
*
|
4 |
* Copyright (c) 2007 CodeSourcery.
|
5 |
* Written by Paul Brook
|
6 |
*
|
7 |
* This code is licenced under the GPL.
|
8 |
*/
|
9 |
#include "hw.h" |
10 |
#include "devices.h" |
11 |
#include "console.h" |
12 |
|
13 |
typedef struct { |
14 |
qemu_irq irq; |
15 |
int keycode;
|
16 |
int pressed;
|
17 |
} gamepad_button; |
18 |
|
19 |
typedef struct { |
20 |
gamepad_button *buttons; |
21 |
int num_buttons;
|
22 |
int extension;
|
23 |
} gamepad_state; |
24 |
|
25 |
static void stellaris_gamepad_put_key(void * opaque, int keycode) |
26 |
{ |
27 |
gamepad_state *s = (gamepad_state *)opaque; |
28 |
int i;
|
29 |
int down;
|
30 |
|
31 |
if (keycode == 0xe0 && !s->extension) { |
32 |
s->extension = 0x80;
|
33 |
return;
|
34 |
} |
35 |
|
36 |
down = (keycode & 0x80) == 0; |
37 |
keycode = (keycode & 0x7f) | s->extension;
|
38 |
|
39 |
for (i = 0; i < s->num_buttons; i++) { |
40 |
if (s->buttons[i].keycode == keycode
|
41 |
&& s->buttons[i].pressed != down) { |
42 |
s->buttons[i].pressed = down; |
43 |
qemu_set_irq(s->buttons[i].irq, down); |
44 |
} |
45 |
} |
46 |
|
47 |
s->extension = 0;
|
48 |
} |
49 |
|
50 |
static void stellaris_gamepad_save(QEMUFile *f, void *opaque) |
51 |
{ |
52 |
gamepad_state *s = (gamepad_state *)opaque; |
53 |
int i;
|
54 |
|
55 |
qemu_put_be32(f, s->extension); |
56 |
for (i = 0; i < s->num_buttons; i++) |
57 |
qemu_put_byte(f, s->buttons[i].pressed); |
58 |
} |
59 |
|
60 |
static int stellaris_gamepad_load(QEMUFile *f, void *opaque, int version_id) |
61 |
{ |
62 |
gamepad_state *s = (gamepad_state *)opaque; |
63 |
int i;
|
64 |
|
65 |
if (version_id != 1) |
66 |
return -EINVAL;
|
67 |
|
68 |
s->extension = qemu_get_be32(f); |
69 |
for (i = 0; i < s->num_buttons; i++) |
70 |
s->buttons[i].pressed = qemu_get_byte(f); |
71 |
|
72 |
return 0; |
73 |
} |
74 |
|
75 |
/* Returns an array 5 ouput slots. */
|
76 |
void stellaris_gamepad_init(int n, qemu_irq *irq, const int *keycode) |
77 |
{ |
78 |
gamepad_state *s; |
79 |
int i;
|
80 |
|
81 |
s = (gamepad_state *)qemu_mallocz(sizeof (gamepad_state));
|
82 |
s->buttons = (gamepad_button *)qemu_mallocz(n * sizeof (gamepad_button));
|
83 |
for (i = 0; i < n; i++) { |
84 |
s->buttons[i].irq = irq[i]; |
85 |
s->buttons[i].keycode = keycode[i]; |
86 |
} |
87 |
s->num_buttons = n; |
88 |
qemu_add_kbd_event_handler(stellaris_gamepad_put_key, s); |
89 |
register_savevm("stellaris_gamepad", -1, 1, |
90 |
stellaris_gamepad_save, stellaris_gamepad_load, s); |
91 |
} |