hw/hid.h

   1 #ifndef QEMU_HID_H
   2 #define QEMU_HID_H
   3
   4 #include "migration/vmstate.h"
   5
   6 #define HID_MOUSE     1
   7 #define HID_TABLET    2
   8 #define HID_KEYBOARD  3
   9
  10 typedef struct HIDPointerEvent {
  11     int32_t xdx, ydy; /* relative iff it's a mouse, otherwise absolute */
  12     int32_t dz, buttons_state;
  13 } HIDPointerEvent;
  14
  15 #define QUEUE_LENGTH    16 /* should be enough for a triple-click */
  16 #define QUEUE_MASK      (QUEUE_LENGTH-1u)
  17 #define QUEUE_INCR(v)   ((v)++, (v) &= QUEUE_MASK)
  18
  19 typedef struct HIDState HIDState;
  20 typedef void (*HIDEventFunc)(HIDState *s);
  21
  22 typedef struct HIDMouseState {
  23     HIDPointerEvent queue[QUEUE_LENGTH];
  24     int mouse_grabbed;
  25     QEMUPutMouseEntry *eh_entry;
  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     int64_t next_idle_clock;
  47     HIDEventFunc event;
  48 };
  49
  50 void hid_init(HIDState *hs, int kind, HIDEventFunc event);
  51 void hid_reset(HIDState *hs);
  52 void hid_free(HIDState *hs);
  53
  54 bool hid_has_events(HIDState *hs);
  55 void hid_set_next_idle(HIDState *hs, int64_t curtime);
  56 void hid_pointer_activate(HIDState *hs);
  57 int hid_pointer_poll(HIDState *hs, uint8_t *buf, int len);
  58 int hid_keyboard_poll(HIDState *hs, uint8_t *buf, int len);
  59 int hid_keyboard_write(HIDState *hs, uint8_t *buf, int len);
  60
  61 extern const VMStateDescription vmstate_hid_keyboard_device;
  62
  63 #define VMSTATE_HID_KEYBOARD_DEVICE(_field, _state) {                \
  64     .name       = (stringify(_field)),                               \
  65     .size       = sizeof(HIDState),                                  \
  66     .vmsd       = &vmstate_hid_keyboard_device,                      \
  67     .flags      = VMS_STRUCT,                                        \
  68     .offset     = vmstate_offset_value(_state, _field, HIDState),    \
  69 }
  70
  71 extern const VMStateDescription vmstate_hid_ptr_device;
  72
  73 #define VMSTATE_HID_POINTER_DEVICE(_field, _state) {                 \
  74     .name       = (stringify(_field)),                               \
  75     .size       = sizeof(HIDState),                                  \
  76     .vmsd       = &vmstate_hid_ptr_device,                           \
  77     .flags      = VMS_STRUCT,                                        \
  78     .offset     = vmstate_offset_value(_state, _field, HIDState),    \
  79 }
  80
  81
  82 #endif /* QEMU_HID_H */