1 files changed, 83 insertions, 0 deletions
diff --git a/include/hw/input/hid.h b/include/hw/input/hid.h
new file mode 100644
index 0000000000..56c71ed5ae
--- /dev/null
+++ b/include/hw/input/hid.h
@@ -0,0 +1,83 @@
+#ifndef QEMU_HID_H
+#define QEMU_HID_H
+
+#include "migration/vmstate.h"
+
+#define HID_MOUSE     1
+#define HID_TABLET    2
+#define HID_KEYBOARD  3
+
+typedef struct HIDPointerEvent {
+    int32_t xdx, ydy; /* relative iff it's a mouse, otherwise absolute */
+    int32_t dz, buttons_state;
+} HIDPointerEvent;
+
+#define QUEUE_LENGTH    16 /* should be enough for a triple-click */
+#define QUEUE_MASK      (QUEUE_LENGTH-1u)
+#define QUEUE_INCR(v)   ((v)++, (v) &= QUEUE_MASK)
+
+typedef struct HIDState HIDState;
+typedef void (*HIDEventFunc)(HIDState *s);
+
+typedef struct HIDMouseState {
+    HIDPointerEvent queue[QUEUE_LENGTH];
+    int mouse_grabbed;
+    QEMUPutMouseEntry *eh_entry;
+} HIDMouseState;
+
+typedef struct HIDKeyboardState {
+    uint32_t keycodes[QUEUE_LENGTH];
+    uint16_t modifiers;
+    uint8_t leds;
+    uint8_t key[16];
+    int32_t keys;
+} HIDKeyboardState;
+
+struct HIDState {
+    union {
+        HIDMouseState ptr;
+        HIDKeyboardState kbd;
+    };
+    uint32_t head; /* index into circular queue */
+    uint32_t n;
+    int kind;
+    int32_t protocol;
+    uint8_t idle;
+    bool idle_pending;
+    QEMUTimer *idle_timer;
+    HIDEventFunc event;
+};
+
+void hid_init(HIDState *hs, int kind, HIDEventFunc event);
+void hid_reset(HIDState *hs);
+void hid_free(HIDState *hs);
+
+bool hid_has_events(HIDState *hs);
+void hid_set_next_idle(HIDState *hs);
+void hid_pointer_activate(HIDState *hs);
+int hid_pointer_poll(HIDState *hs, uint8_t *buf, int len);
+int hid_keyboard_poll(HIDState *hs, uint8_t *buf, int len);
+int hid_keyboard_write(HIDState *hs, uint8_t *buf, int len);
+
+extern const VMStateDescription vmstate_hid_keyboard_device;
+
+#define VMSTATE_HID_KEYBOARD_DEVICE(_field, _state) {                \
+    .name       = (stringify(_field)),                               \
+    .size       = sizeof(HIDState),                                  \
+    .vmsd       = &vmstate_hid_keyboard_device,                      \
+    .flags      = VMS_STRUCT,                                        \
+    .offset     = vmstate_offset_value(_state, _field, HIDState),    \
+}
+
+extern const VMStateDescription vmstate_hid_ptr_device;
+
+#define VMSTATE_HID_POINTER_DEVICE(_field, _state) {                 \
+    .name       = (stringify(_field)),                               \
+    .size       = sizeof(HIDState),                                  \
+    .vmsd       = &vmstate_hid_ptr_device,                           \
+    .flags      = VMS_STRUCT,                                        \
+    .offset     = vmstate_offset_value(_state, _field, HIDState),    \
+}
+
+
+#endif /* QEMU_HID_H */