1 | /* |
2 | * QEMU Microsoft serial mouse emulation |
3 | * |
4 | * Copyright (c) 2008 Lubomir Rintel |
5 | * |
6 | * Permission is hereby granted, free of charge, to any person obtaining a copy |
7 | * of this software and associated documentation files (the "Software"), to deal |
8 | * in the Software without restriction, including without limitation the rights |
9 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
10 | * copies of the Software, and to permit persons to whom the Software is |
11 | * furnished to do so, subject to the following conditions: |
12 | * |
13 | * The above copyright notice and this permission notice shall be included in |
14 | * all copies or substantial portions of the Software. |
15 | * |
16 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
17 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
18 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
19 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
20 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
21 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
22 | * THE SOFTWARE. |
23 | */ |
24 | |
25 | #include "qemu/osdep.h" |
26 | #include "qemu/module.h" |
27 | #include "chardev/char.h" |
28 | #include "ui/console.h" |
29 | #include "ui/input.h" |
30 | |
31 | #define MSMOUSE_LO6(n) ((n) & 0x3f) |
32 | #define MSMOUSE_HI2(n) (((n) & 0xc0) >> 6) |
33 | |
34 | typedef struct { |
35 | Chardev parent; |
36 | |
37 | QemuInputHandlerState *hs; |
38 | int axis[INPUT_AXIS__MAX]; |
39 | bool btns[INPUT_BUTTON__MAX]; |
40 | bool btnc[INPUT_BUTTON__MAX]; |
41 | uint8_t outbuf[32]; |
42 | int outlen; |
43 | } MouseChardev; |
44 | |
45 | #define TYPE_CHARDEV_MSMOUSE "chardev-msmouse" |
46 | #define MOUSE_CHARDEV(obj) \ |
47 | OBJECT_CHECK(MouseChardev, (obj), TYPE_CHARDEV_MSMOUSE) |
48 | |
49 | static void msmouse_chr_accept_input(Chardev *chr) |
50 | { |
51 | MouseChardev *mouse = MOUSE_CHARDEV(chr); |
52 | int len; |
53 | |
54 | len = qemu_chr_be_can_write(chr); |
55 | if (len > mouse->outlen) { |
56 | len = mouse->outlen; |
57 | } |
58 | if (!len) { |
59 | return; |
60 | } |
61 | |
62 | qemu_chr_be_write(chr, mouse->outbuf, len); |
63 | mouse->outlen -= len; |
64 | if (mouse->outlen) { |
65 | memmove(mouse->outbuf, mouse->outbuf + len, mouse->outlen); |
66 | } |
67 | } |
68 | |
69 | static void msmouse_queue_event(MouseChardev *mouse) |
70 | { |
71 | unsigned char bytes[4] = { 0x40, 0x00, 0x00, 0x00 }; |
72 | int dx, dy, count = 3; |
73 | |
74 | dx = mouse->axis[INPUT_AXIS_X]; |
75 | mouse->axis[INPUT_AXIS_X] = 0; |
76 | |
77 | dy = mouse->axis[INPUT_AXIS_Y]; |
78 | mouse->axis[INPUT_AXIS_Y] = 0; |
79 | |
80 | /* Movement deltas */ |
81 | bytes[0] |= (MSMOUSE_HI2(dy) << 2) | MSMOUSE_HI2(dx); |
82 | bytes[1] |= MSMOUSE_LO6(dx); |
83 | bytes[2] |= MSMOUSE_LO6(dy); |
84 | |
85 | /* Buttons */ |
86 | bytes[0] |= (mouse->btns[INPUT_BUTTON_LEFT] ? 0x20 : 0x00); |
87 | bytes[0] |= (mouse->btns[INPUT_BUTTON_RIGHT] ? 0x10 : 0x00); |
88 | if (mouse->btns[INPUT_BUTTON_MIDDLE] || |
89 | mouse->btnc[INPUT_BUTTON_MIDDLE]) { |
90 | bytes[3] |= (mouse->btns[INPUT_BUTTON_MIDDLE] ? 0x20 : 0x00); |
91 | mouse->btnc[INPUT_BUTTON_MIDDLE] = false; |
92 | count = 4; |
93 | } |
94 | |
95 | if (mouse->outlen <= sizeof(mouse->outbuf) - count) { |
96 | memcpy(mouse->outbuf + mouse->outlen, bytes, count); |
97 | mouse->outlen += count; |
98 | } else { |
99 | /* queue full -> drop event */ |
100 | } |
101 | } |
102 | |
103 | static void msmouse_input_event(DeviceState *dev, QemuConsole *src, |
104 | InputEvent *evt) |
105 | { |
106 | MouseChardev *mouse = MOUSE_CHARDEV(dev); |
107 | InputMoveEvent *move; |
108 | InputBtnEvent *btn; |
109 | |
110 | switch (evt->type) { |
111 | case INPUT_EVENT_KIND_REL: |
112 | move = evt->u.rel.data; |
113 | mouse->axis[move->axis] += move->value; |
114 | break; |
115 | |
116 | case INPUT_EVENT_KIND_BTN: |
117 | btn = evt->u.btn.data; |
118 | mouse->btns[btn->button] = btn->down; |
119 | mouse->btnc[btn->button] = true; |
120 | break; |
121 | |
122 | default: |
123 | /* keep gcc happy */ |
124 | break; |
125 | } |
126 | } |
127 | |
128 | static void msmouse_input_sync(DeviceState *dev) |
129 | { |
130 | MouseChardev *mouse = MOUSE_CHARDEV(dev); |
131 | Chardev *chr = CHARDEV(dev); |
132 | |
133 | msmouse_queue_event(mouse); |
134 | msmouse_chr_accept_input(chr); |
135 | } |
136 | |
137 | static int msmouse_chr_write(struct Chardev *s, const uint8_t *buf, int len) |
138 | { |
139 | /* Ignore writes to mouse port */ |
140 | return len; |
141 | } |
142 | |
143 | static void char_msmouse_finalize(Object *obj) |
144 | { |
145 | MouseChardev *mouse = MOUSE_CHARDEV(obj); |
146 | |
147 | qemu_input_handler_unregister(mouse->hs); |
148 | } |
149 | |
150 | static QemuInputHandler msmouse_handler = { |
151 | .name = "QEMU Microsoft Mouse" , |
152 | .mask = INPUT_EVENT_MASK_BTN | INPUT_EVENT_MASK_REL, |
153 | .event = msmouse_input_event, |
154 | .sync = msmouse_input_sync, |
155 | }; |
156 | |
157 | static void msmouse_chr_open(Chardev *chr, |
158 | ChardevBackend *backend, |
159 | bool *be_opened, |
160 | Error **errp) |
161 | { |
162 | MouseChardev *mouse = MOUSE_CHARDEV(chr); |
163 | |
164 | *be_opened = false; |
165 | mouse->hs = qemu_input_handler_register((DeviceState *)mouse, |
166 | &msmouse_handler); |
167 | } |
168 | |
169 | static void char_msmouse_class_init(ObjectClass *oc, void *data) |
170 | { |
171 | ChardevClass *cc = CHARDEV_CLASS(oc); |
172 | |
173 | cc->open = msmouse_chr_open; |
174 | cc->chr_write = msmouse_chr_write; |
175 | cc->chr_accept_input = msmouse_chr_accept_input; |
176 | } |
177 | |
178 | static const TypeInfo char_msmouse_type_info = { |
179 | .name = TYPE_CHARDEV_MSMOUSE, |
180 | .parent = TYPE_CHARDEV, |
181 | .instance_size = sizeof(MouseChardev), |
182 | .instance_finalize = char_msmouse_finalize, |
183 | .class_init = char_msmouse_class_init, |
184 | }; |
185 | |
186 | static void register_types(void) |
187 | { |
188 | type_register_static(&char_msmouse_type_info); |
189 | } |
190 | |
191 | type_init(register_types); |
192 | |