xref: /openbmc/qemu/include/hw/input/hid.h (revision afd76053)
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 */
84