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 10 #include "qemu/osdep.h" 11 #include "qapi/error.h" 12 #include "hw/input/stellaris_gamepad.h" 13 #include "hw/irq.h" 14 #include "hw/qdev-properties.h" 15 #include "migration/vmstate.h" 16 #include "ui/console.h" 17 18 static void stellaris_gamepad_event(DeviceState *dev, QemuConsole *src, 19 InputEvent *evt) 20 { 21 StellarisGamepad *s = STELLARIS_GAMEPAD(dev); 22 InputKeyEvent *key = evt->u.key.data; 23 int qcode = qemu_input_key_value_to_qcode(key->key); 24 int i; 25 26 for (i = 0; i < s->num_buttons; i++) { 27 if (s->keycodes[i] == qcode && s->pressed[i] != key->down) { 28 s->pressed[i] = key->down; 29 qemu_set_irq(s->irqs[i], key->down); 30 } 31 } 32 } 33 34 static const VMStateDescription vmstate_stellaris_gamepad = { 35 .name = "stellaris_gamepad", 36 .version_id = 4, 37 .minimum_version_id = 4, 38 .fields = (VMStateField[]) { 39 VMSTATE_VARRAY_UINT32(pressed, StellarisGamepad, num_buttons, 40 0, vmstate_info_uint8, uint8_t), 41 VMSTATE_END_OF_LIST() 42 } 43 }; 44 45 static const QemuInputHandler stellaris_gamepad_handler = { 46 .name = "Stellaris Gamepad", 47 .mask = INPUT_EVENT_MASK_KEY, 48 .event = stellaris_gamepad_event, 49 }; 50 51 static void stellaris_gamepad_realize(DeviceState *dev, Error **errp) 52 { 53 StellarisGamepad *s = STELLARIS_GAMEPAD(dev); 54 55 if (s->num_buttons == 0) { 56 error_setg(errp, "keycodes property array must be set"); 57 return; 58 } 59 60 s->irqs = g_new0(qemu_irq, s->num_buttons); 61 s->pressed = g_new0(uint8_t, s->num_buttons); 62 qdev_init_gpio_out(dev, s->irqs, s->num_buttons); 63 qemu_input_handler_register(dev, &stellaris_gamepad_handler); 64 } 65 66 static void stellaris_gamepad_reset_enter(Object *obj, ResetType type) 67 { 68 StellarisGamepad *s = STELLARIS_GAMEPAD(obj); 69 70 memset(s->pressed, 0, s->num_buttons * sizeof(uint8_t)); 71 } 72 73 static Property stellaris_gamepad_properties[] = { 74 DEFINE_PROP_ARRAY("keycodes", StellarisGamepad, num_buttons, 75 keycodes, qdev_prop_uint32, uint32_t), 76 DEFINE_PROP_END_OF_LIST(), 77 }; 78 79 static void stellaris_gamepad_class_init(ObjectClass *klass, void *data) 80 { 81 DeviceClass *dc = DEVICE_CLASS(klass); 82 ResettableClass *rc = RESETTABLE_CLASS(klass); 83 84 rc->phases.enter = stellaris_gamepad_reset_enter; 85 dc->realize = stellaris_gamepad_realize; 86 dc->vmsd = &vmstate_stellaris_gamepad; 87 device_class_set_props(dc, stellaris_gamepad_properties); 88 } 89 90 static const TypeInfo stellaris_gamepad_info[] = { 91 { 92 .name = TYPE_STELLARIS_GAMEPAD, 93 .parent = TYPE_SYS_BUS_DEVICE, 94 .instance_size = sizeof(StellarisGamepad), 95 .class_init = stellaris_gamepad_class_init, 96 }, 97 }; 98 99 DEFINE_TYPES(stellaris_gamepad_info); 100