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/*
* Gamepad style buttons connected to IRQ/GPIO lines
*
* Copyright (c) 2007 CodeSourcery.
* Written by Paul Brook
*
* This code is licensed under the GPL.
*/
#include "hw/hw.h"
#include "hw/devices.h"
#include "ui/console.h"
typedef struct {
qemu_irq irq;
int keycode;
uint8_t pressed;
} gamepad_button;
typedef struct {
gamepad_button *buttons;
int num_buttons;
int extension;
} gamepad_state;
static void stellaris_gamepad_put_key(void * opaque, int keycode)
{
gamepad_state *s = (gamepad_state *)opaque;
int i;
int down;
if (keycode == 0xe0 && !s->extension) {
s->extension = 0x80;
return;
}
down = (keycode & 0x80) == 0;
keycode = (keycode & 0x7f) | s->extension;
for (i = 0; i < s->num_buttons; i++) {
if (s->buttons[i].keycode == keycode
&& s->buttons[i].pressed != down) {
s->buttons[i].pressed = down;
qemu_set_irq(s->buttons[i].irq, down);
}
}
s->extension = 0;
}
static const VMStateDescription vmstate_stellaris_button = {
.name = "stellaris_button",
.version_id = 0,
.minimum_version_id = 0,
.fields = (VMStateField[]) {
VMSTATE_UINT8(pressed, gamepad_button),
VMSTATE_END_OF_LIST()
}
};
static const VMStateDescription vmstate_stellaris_gamepad = {
.name = "stellaris_gamepad",
.version_id = 1,
.minimum_version_id = 1,
.fields = (VMStateField[]) {
VMSTATE_INT32(extension, gamepad_state),
VMSTATE_STRUCT_VARRAY_INT32(buttons, gamepad_state, num_buttons, 0,
vmstate_stellaris_button, gamepad_button),
VMSTATE_END_OF_LIST()
}
};
/* Returns an array of 5 output slots. */
void stellaris_gamepad_init(int n, qemu_irq *irq, const int *keycode)
{
gamepad_state *s;
int i;
s = g_new0(gamepad_state, 1);
s->buttons = g_new0(gamepad_button, n);
for (i = 0; i < n; i++) {
s->buttons[i].irq = irq[i];
s->buttons[i].keycode = keycode[i];
}
s->num_buttons = n;
qemu_add_kbd_event_handler(stellaris_gamepad_put_key, s);
vmstate_register(NULL, -1, &vmstate_stellaris_gamepad, s);
}
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