372e458ebc
gamepad_state::buttons is a pointer to an array of structs, not an array of structs, so should be declared in the vmstate with VMSTATE_STRUCT_VARRAY_POINTER_INT32; otherwise we corrupt memory on incoming migration. We bump the vmstate version field as the easiest way to deal with the migration break, since migration wouldn't have worked reliably before anyway. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Reviewed-by: Damien Hedde <damien.hedde@greensocs.com> Message-id: 20190725163710.11703-2-peter.maydell@linaro.org
91 lines
2.3 KiB
C
91 lines
2.3 KiB
C
/*
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* Gamepad style buttons connected to IRQ/GPIO lines
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*
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* Copyright (c) 2007 CodeSourcery.
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* Written by Paul Brook
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*
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* This code is licensed under the GPL.
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*/
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#include "qemu/osdep.h"
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#include "hw/hw.h"
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#include "hw/input/gamepad.h"
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#include "ui/console.h"
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typedef struct {
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qemu_irq irq;
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int keycode;
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uint8_t pressed;
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} gamepad_button;
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typedef struct {
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gamepad_button *buttons;
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int num_buttons;
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int extension;
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} gamepad_state;
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static void stellaris_gamepad_put_key(void * opaque, int keycode)
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{
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gamepad_state *s = (gamepad_state *)opaque;
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int i;
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int down;
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if (keycode == 0xe0 && !s->extension) {
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s->extension = 0x80;
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return;
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}
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down = (keycode & 0x80) == 0;
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keycode = (keycode & 0x7f) | s->extension;
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for (i = 0; i < s->num_buttons; i++) {
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if (s->buttons[i].keycode == keycode
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&& s->buttons[i].pressed != down) {
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s->buttons[i].pressed = down;
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qemu_set_irq(s->buttons[i].irq, down);
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}
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}
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s->extension = 0;
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}
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static const VMStateDescription vmstate_stellaris_button = {
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.name = "stellaris_button",
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.version_id = 0,
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.minimum_version_id = 0,
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.fields = (VMStateField[]) {
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VMSTATE_UINT8(pressed, gamepad_button),
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VMSTATE_END_OF_LIST()
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}
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};
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static const VMStateDescription vmstate_stellaris_gamepad = {
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.name = "stellaris_gamepad",
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.version_id = 2,
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.minimum_version_id = 2,
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.fields = (VMStateField[]) {
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VMSTATE_INT32(extension, gamepad_state),
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VMSTATE_STRUCT_VARRAY_POINTER_INT32(buttons, gamepad_state,
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num_buttons,
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vmstate_stellaris_button,
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gamepad_button),
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VMSTATE_END_OF_LIST()
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}
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};
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/* Returns an array of 5 output slots. */
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void stellaris_gamepad_init(int n, qemu_irq *irq, const int *keycode)
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{
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gamepad_state *s;
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int i;
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s = g_new0(gamepad_state, 1);
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s->buttons = g_new0(gamepad_button, n);
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for (i = 0; i < n; i++) {
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s->buttons[i].irq = irq[i];
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s->buttons[i].keycode = keycode[i];
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}
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s->num_buttons = n;
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qemu_add_kbd_event_handler(stellaris_gamepad_put_key, s);
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vmstate_register(NULL, -1, &vmstate_stellaris_gamepad, s);
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}
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