include/hw/input/hid.h

   1 #ifndef QEMU_HID_H
   2 #define QEMU_HID_H
   3
   4 #include "migration/vmstate.h"
   5 #include "ui/input.h"
   6
   7 #define HID_MOUSE     1
   8 #define HID_TABLET    2
   9 #define HID_KEYBOARD  3
  10
  11 typedef struct HIDPointerEvent {
  12     int32_t xdx, ydy; /* relative iff it's a mouse, otherwise absolute */
  13     int32_t dz, buttons_state;
  14 } HIDPointerEvent;
  15
  16 #define QUEUE_LENGTH    16 /* should be enough for a triple-click */
  17 #define QUEUE_MASK      (QUEUE_LENGTH-1u)
  18 #define QUEUE_INCR(v)   ((v)++, (v) &= QUEUE_MASK)
  19
  20 typedef struct HIDState HIDState;
  21 typedef void (*HIDEventFunc)(HIDState *s);
  22
  23 typedef struct HIDMouseState {
  24     HIDPointerEvent queue[QUEUE_LENGTH];
  25     int mouse_grabbed;
  26 } HIDMouseState;
  27
  28 typedef struct HIDKeyboardState {
  29     uint32_t keycodes[QUEUE_LENGTH];
  30     uint16_t modifiers;
  31     uint8_t leds;
  32     uint8_t key[16];
  33     int32_t keys;
  34 } HIDKeyboardState;
  35
  36 struct HIDState {
  37     union {
  38         HIDMouseState ptr;
  39         HIDKeyboardState kbd;
  40     };
  41     uint32_t head; /* index into circular queue */
  42     uint32_t n;
  43     int kind;
  44     int32_t protocol;
  45     uint8_t idle;
  46     bool idle_pending;
  47     QEMUTimer *idle_timer;
  48     HIDEventFunc event;
  49     QemuInputHandlerState *s;
  50 };
  51
  52 void hid_init(HIDState *hs, int kind, HIDEventFunc event);
  53 void hid_reset(HIDState *hs);
  54 void hid_free(HIDState *hs);
  55
  56 bool hid_has_events(HIDState *hs);
  57 void hid_set_next_idle(HIDState *hs);
  58 void hid_pointer_activate(HIDState *hs);
  59 int hid_pointer_poll(HIDState *hs, uint8_t *buf, int len);
  60 int hid_keyboard_poll(HIDState *hs, uint8_t *buf, int len);
  61 int hid_keyboard_write(HIDState *hs, uint8_t *buf, int len);
  62
  63 extern const VMStateDescription vmstate_hid_keyboard_device;
  64
  65 #define VMSTATE_HID_KEYBOARD_DEVICE(_field, _state) {                \
  66     .name       = (stringify(_field)),                               \
  67     .size       = sizeof(HIDState),                                  \
  68     .vmsd       = &vmstate_hid_keyboard_device,                      \
  69     .flags      = VMS_STRUCT,                                        \
  70     .offset     = vmstate_offset_value(_state, _field, HIDState),    \
  71 }
  72
  73 extern const VMStateDescription vmstate_hid_ptr_device;
  74
  75 #define VMSTATE_HID_POINTER_DEVICE(_field, _state) {                 \
  76     .name       = (stringify(_field)),                               \
  77     .size       = sizeof(HIDState),                                  \
  78     .vmsd       = &vmstate_hid_ptr_device,                           \
  79     .flags      = VMS_STRUCT,                                        \
  80     .offset     = vmstate_offset_value(_state, _field, HIDState),    \
  81 }
  82
  83
  84 #endif /* QEMU_HID_H */