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authorYang Zhang <yang.z.zhang@intel.com>2015-08-28 09:58:54 +0800
committerYang Zhang <yang.z.zhang@intel.com>2015-09-01 12:44:00 +0800
commite44e3482bdb4d0ebde2d8b41830ac2cdb07948fb (patch)
tree66b09f592c55df2878107a468a91d21506104d3f /qemu/hw/input/stellaris_input.c
parent9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (diff)
Add qemu 2.4.0
Change-Id: Ic99cbad4b61f8b127b7dc74d04576c0bcbaaf4f5 Signed-off-by: Yang Zhang <yang.z.zhang@intel.com>
Diffstat (limited to 'qemu/hw/input/stellaris_input.c')
-rw-r--r--qemu/hw/input/stellaris_input.c87
1 files changed, 87 insertions, 0 deletions
diff --git a/qemu/hw/input/stellaris_input.c b/qemu/hw/input/stellaris_input.c
new file mode 100644
index 000000000..0609e8086
--- /dev/null
+++ b/qemu/hw/input/stellaris_input.c
@@ -0,0 +1,87 @@
+/*
+ * 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);
+}