| 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/core/irq.h" |
| 14 | #include "hw/core/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 | QemuInputEvent *evt) |
| 20 | { |
| 21 | StellarisGamepad *s = STELLARIS_GAMEPAD(dev); |
| 22 | int qcode = qemu_input_linux_to_qcode(evt->key.key); |
| 23 | int i; |
| 24 | |
| 25 | for (i = 0; i < s->num_buttons; i++) { |
| 26 | if (s->keycodes[i] == qcode && s->pressed[i] != evt->key.down) { |
| 27 | s->pressed[i] = evt->key.down; |
| 28 | qemu_set_irq(s->irqs[i], evt->key.down); |
| 29 | } |
| 30 | } |
| 31 | } |
| 32 | |
| 33 | static const VMStateDescription vmstate_stellaris_gamepad = { |
| 34 | .name = "stellaris_gamepad", |
| 35 | .version_id = 4, |
| 36 | .minimum_version_id = 4, |
| 37 | .fields = (const VMStateField[]) { |
| 38 | VMSTATE_VARRAY_UINT32(pressed, StellarisGamepad, num_buttons, |
| 39 | 0, vmstate_info_uint8, uint8_t), |
| 40 | VMSTATE_END_OF_LIST() |
| 41 | } |
| 42 | }; |
| 43 | |
| 44 | static const QemuInputHandler stellaris_gamepad_handler = { |
| 45 | .name = "Stellaris Gamepad", |
| 46 | .mask = INPUT_EVENT_MASK_KEY, |
| 47 | .event = stellaris_gamepad_event, |
| 48 | }; |
| 49 | |
| 50 | static void stellaris_gamepad_realize(DeviceState *dev, Error **errp) |
| 51 | { |
| 52 | StellarisGamepad *s = STELLARIS_GAMEPAD(dev); |
| 53 | |
| 54 | if (s->num_buttons == 0) { |
| 55 | error_setg(errp, "keycodes property array must be set"); |
| 56 | return; |
| 57 | } |
| 58 | |
| 59 | s->irqs = g_new0(qemu_irq, s->num_buttons); |
| 60 | s->pressed = g_new0(uint8_t, s->num_buttons); |
| 61 | qdev_init_gpio_out(dev, s->irqs, s->num_buttons); |
| 62 | s->hs = qemu_input_handler_register(dev, &stellaris_gamepad_handler); |
| 63 | } |
| 64 | |
| 65 | static void stellaris_gamepad_unrealize(DeviceState *dev) |
| 66 | { |
| 67 | StellarisGamepad *s = STELLARIS_GAMEPAD(dev); |
| 68 | |
| 69 | g_clear_pointer(&s->irqs, g_free); |
| 70 | g_clear_pointer(&s->pressed, g_free); |
| 71 | g_clear_pointer(&s->hs, qemu_input_handler_unregister); |
| 72 | } |
| 73 | |
| 74 | static void stellaris_gamepad_reset_enter(Object *obj, ResetType type) |
| 75 | { |
| 76 | StellarisGamepad *s = STELLARIS_GAMEPAD(obj); |
| 77 | |
| 78 | memset(s->pressed, 0, s->num_buttons * sizeof(uint8_t)); |
| 79 | } |
| 80 | |
| 81 | static const Property stellaris_gamepad_properties[] = { |
| 82 | DEFINE_PROP_ARRAY("keycodes", StellarisGamepad, num_buttons, |
| 83 | keycodes, qdev_prop_uint32, uint32_t), |
| 84 | }; |
| 85 | |
| 86 | static void stellaris_gamepad_class_init(ObjectClass *klass, const void *data) |
| 87 | { |
| 88 | DeviceClass *dc = DEVICE_CLASS(klass); |
| 89 | ResettableClass *rc = RESETTABLE_CLASS(klass); |
| 90 | |
| 91 | rc->phases.enter = stellaris_gamepad_reset_enter; |
| 92 | dc->realize = stellaris_gamepad_realize; |
| 93 | dc->unrealize = stellaris_gamepad_unrealize; |
| 94 | dc->vmsd = &vmstate_stellaris_gamepad; |
| 95 | device_class_set_props(dc, stellaris_gamepad_properties); |
| 96 | } |
| 97 | |
| 98 | static const TypeInfo stellaris_gamepad_info[] = { |
| 99 | { |
| 100 | .name = TYPE_STELLARIS_GAMEPAD, |
| 101 | .parent = TYPE_SYS_BUS_DEVICE, |
| 102 | .instance_size = sizeof(StellarisGamepad), |
| 103 | .class_init = stellaris_gamepad_class_init, |
| 104 | }, |
| 105 | }; |
| 106 | |
| 107 | DEFINE_TYPES(stellaris_gamepad_info); |