/* * Gamepad style buttons connected to IRQ/GPIO lines * * Copyright (c) 2007 CodeSourcery. * Written by Paul Brook * * This code is licensed under the GPL. */ #include "qemu/osdep.h" #include "hw/input/gamepad.h" #include "hw/irq.h" #include "migration/vmstate.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 = 2, .minimum_version_id = 2, .fields = (VMStateField[]) { VMSTATE_INT32(extension, gamepad_state), VMSTATE_STRUCT_VARRAY_POINTER_INT32(buttons, gamepad_state, num_buttons, 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_any(NULL, &vmstate_stellaris_gamepad, s); }