]> Git Repo - qemu.git/blob - hw/input/stellaris_input.c
arm: fix location of some include files
[qemu.git] / hw / input / stellaris_input.c
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 licensed under the GPL.
8  */
9 #include "hw/hw.h"
10 #include "hw/devices.h"
11 #include "ui/console.h"
12
13 typedef struct {
14     qemu_irq irq;
15     int keycode;
16     uint8_t 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 const VMStateDescription vmstate_stellaris_button = {
51     .name = "stellaris_button",
52     .version_id = 0,
53     .minimum_version_id = 0,
54     .minimum_version_id_old = 0,
55     .fields      = (VMStateField[]) {
56         VMSTATE_UINT8(pressed, gamepad_button),
57         VMSTATE_END_OF_LIST()
58     }
59 };
60
61 static const VMStateDescription vmstate_stellaris_gamepad = {
62     .name = "stellaris_gamepad",
63     .version_id = 1,
64     .minimum_version_id = 1,
65     .minimum_version_id_old = 1,
66     .fields      = (VMStateField[]) {
67         VMSTATE_INT32(extension, gamepad_state),
68         VMSTATE_STRUCT_VARRAY_INT32(buttons, gamepad_state, num_buttons, 0,
69                               vmstate_stellaris_button, gamepad_button),
70         VMSTATE_END_OF_LIST()
71     }
72 };
73
74 /* Returns an array 5 ouput slots.  */
75 void stellaris_gamepad_init(int n, qemu_irq *irq, const int *keycode)
76 {
77     gamepad_state *s;
78     int i;
79
80     s = (gamepad_state *)g_malloc0(sizeof (gamepad_state));
81     s->buttons = (gamepad_button *)g_malloc0(n * sizeof (gamepad_button));
82     for (i = 0; i < n; i++) {
83         s->buttons[i].irq = irq[i];
84         s->buttons[i].keycode = keycode[i];
85     }
86     s->num_buttons = n;
87     qemu_add_kbd_event_handler(stellaris_gamepad_put_key, s);
88     vmstate_register(NULL, -1, &vmstate_stellaris_gamepad, s);
89 }
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