| /* |
| * 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 5 ouput slots. */ |
| void stellaris_gamepad_init(int n, qemu_irq *irq, const int *keycode) |
| { |
| gamepad_state *s; |
| int i; |
| |
| s = (gamepad_state *)g_malloc0(sizeof (gamepad_state)); |
| s->buttons = (gamepad_button *)g_malloc0(n * sizeof (gamepad_button)); |
| 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); |
| } |