include/hw/input/hid.h

   1 #ifndef QEMU_HID_H
   2 #define QEMU_HID_H
   3
   4 #include "ui/input.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 } HIDMouseState;
  26
  27 typedef struct HIDKeyboardState {
  28     uint32_t keycodes[QUEUE_LENGTH];
  29     uint16_t modifiers;
  30     uint8_t leds;
  31     uint8_t key[16];
  32     int32_t keys;
  33 } HIDKeyboardState;
  34
  35 struct HIDState {
  36     union {
  37         HIDMouseState ptr;
  38         HIDKeyboardState kbd;
  39     };
  40     uint32_t head; /* index into circular queue */
  41     uint32_t n;
  42     int kind;
  43     int32_t protocol;
  44     uint8_t idle;
  45     bool idle_pending;
  46     QEMUTimer *idle_timer;
  47     HIDEventFunc event;
  48     QemuInputHandlerState *s;
  49 };
  50
  51 void hid_init(HIDState *hs, int kind, HIDEventFunc event);
  52 void hid_reset(HIDState *hs);
  53 void hid_free(HIDState *hs);
  54
  55 bool hid_has_events(HIDState *hs);
  56 void hid_set_next_idle(HIDState *hs);
  57 void hid_pointer_activate(HIDState *hs);
  58 int hid_pointer_poll(HIDState *hs, uint8_t *buf, int len);
  59 int hid_keyboard_poll(HIDState *hs, uint8_t *buf, int len);
  60 int hid_keyboard_write(HIDState *hs, uint8_t *buf, int len);
  61
  62 extern const VMStateDescription vmstate_hid_keyboard_device;
  63
  64 #define VMSTATE_HID_KEYBOARD_DEVICE(_field, _state) {                \
  65     .name       = (stringify(_field)),                               \
  66     .size       = sizeof(HIDState),                                  \
  67     .vmsd       = &vmstate_hid_keyboard_device,                      \
  68     .flags      = VMS_STRUCT,                                        \
  69     .offset     = vmstate_offset_value(_state, _field, HIDState),    \
  70 }
  71
  72 extern const VMStateDescription vmstate_hid_ptr_device;
  73
  74 #define VMSTATE_HID_POINTER_DEVICE(_field, _state) {                 \
  75     .name       = (stringify(_field)),                               \
  76     .size       = sizeof(HIDState),                                  \
  77     .vmsd       = &vmstate_hid_ptr_device,                           \
  78     .flags      = VMS_STRUCT,                                        \
  79     .offset     = vmstate_offset_value(_state, _field, HIDState),    \
  80 }
  81
  82
  83 #endif /* QEMU_HID_H */