LXR qemu/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
  11typedef 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
  20typedef struct HIDState HIDState;
  21typedef void (*HIDEventFunc)(HIDState *s);
  22
  23typedef struct HIDMouseState {
  24    HIDPointerEvent queue[QUEUE_LENGTH];
  25    int mouse_grabbed;
  26} HIDMouseState;
  27
  28typedef 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
  36struct 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
  52void hid_init(HIDState *hs, int kind, HIDEventFunc event);
  53void hid_reset(HIDState *hs);
  54void hid_free(HIDState *hs);
  55
  56bool hid_has_events(HIDState *hs);
  57void hid_set_next_idle(HIDState *hs);
  58void hid_pointer_activate(HIDState *hs);
  59int hid_pointer_poll(HIDState *hs, uint8_t *buf, int len);
  60int hid_keyboard_poll(HIDState *hs, uint8_t *buf, int len);
  61int hid_keyboard_write(HIDState *hs, uint8_t *buf, int len);
  62
  63extern 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
  73extern 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 */
  85