tests: virtio-9p: add version operation test
[qemu.git] / backends / msmouse.c
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 #include "qemu/osdep.h"
25 #include "qemu-common.h"
26 #include "sysemu/char.h"
27 #include "ui/console.h"
28 #include "ui/input.h"
29
30 #define MSMOUSE_LO6(n) ((n) & 0x3f)
31 #define MSMOUSE_HI2(n) (((n) & 0xc0) >> 6)
32
33 typedef struct {
34 CharDriverState *chr;
35 QemuInputHandlerState *hs;
36 int axis[INPUT_AXIS__MAX];
37 bool btns[INPUT_BUTTON__MAX];
38 bool btnc[INPUT_BUTTON__MAX];
39 uint8_t outbuf[32];
40 int outlen;
41 } MouseState;
42
43 static void msmouse_chr_accept_input(CharDriverState *chr)
44 {
45 MouseState *mouse = chr->opaque;
46 int len;
47
48 len = qemu_chr_be_can_write(chr);
49 if (len > mouse->outlen) {
50 len = mouse->outlen;
51 }
52 if (!len) {
53 return;
54 }
55
56 qemu_chr_be_write(chr, mouse->outbuf, len);
57 mouse->outlen -= len;
58 if (mouse->outlen) {
59 memmove(mouse->outbuf, mouse->outbuf + len, mouse->outlen);
60 }
61 }
62
63 static void msmouse_queue_event(MouseState *mouse)
64 {
65 unsigned char bytes[4] = { 0x40, 0x00, 0x00, 0x00 };
66 int dx, dy, count = 3;
67
68 dx = mouse->axis[INPUT_AXIS_X];
69 mouse->axis[INPUT_AXIS_X] = 0;
70
71 dy = mouse->axis[INPUT_AXIS_Y];
72 mouse->axis[INPUT_AXIS_Y] = 0;
73
74 /* Movement deltas */
75 bytes[0] |= (MSMOUSE_HI2(dy) << 2) | MSMOUSE_HI2(dx);
76 bytes[1] |= MSMOUSE_LO6(dx);
77 bytes[2] |= MSMOUSE_LO6(dy);
78
79 /* Buttons */
80 bytes[0] |= (mouse->btns[INPUT_BUTTON_LEFT] ? 0x20 : 0x00);
81 bytes[0] |= (mouse->btns[INPUT_BUTTON_RIGHT] ? 0x10 : 0x00);
82 if (mouse->btns[INPUT_BUTTON_MIDDLE] ||
83 mouse->btnc[INPUT_BUTTON_MIDDLE]) {
84 bytes[3] |= (mouse->btns[INPUT_BUTTON_MIDDLE] ? 0x20 : 0x00);
85 mouse->btnc[INPUT_BUTTON_MIDDLE] = false;
86 count = 4;
87 }
88
89 if (mouse->outlen <= sizeof(mouse->outbuf) - count) {
90 memcpy(mouse->outbuf + mouse->outlen, bytes, count);
91 mouse->outlen += count;
92 } else {
93 /* queue full -> drop event */
94 }
95 }
96
97 static void msmouse_input_event(DeviceState *dev, QemuConsole *src,
98 InputEvent *evt)
99 {
100 MouseState *mouse = (MouseState *)dev;
101 InputMoveEvent *move;
102 InputBtnEvent *btn;
103
104 switch (evt->type) {
105 case INPUT_EVENT_KIND_REL:
106 move = evt->u.rel.data;
107 mouse->axis[move->axis] += move->value;
108 break;
109
110 case INPUT_EVENT_KIND_BTN:
111 btn = evt->u.btn.data;
112 mouse->btns[btn->button] = btn->down;
113 mouse->btnc[btn->button] = true;
114 break;
115
116 default:
117 /* keep gcc happy */
118 break;
119 }
120 }
121
122 static void msmouse_input_sync(DeviceState *dev)
123 {
124 MouseState *mouse = (MouseState *)dev;
125
126 msmouse_queue_event(mouse);
127 msmouse_chr_accept_input(mouse->chr);
128 }
129
130 static int msmouse_chr_write (struct CharDriverState *s, const uint8_t *buf, int len)
131 {
132 /* Ignore writes to mouse port */
133 return len;
134 }
135
136 static void msmouse_chr_free(struct CharDriverState *chr)
137 {
138 MouseState *mouse = chr->opaque;
139
140 qemu_input_handler_unregister(mouse->hs);
141 g_free(mouse);
142 }
143
144 static QemuInputHandler msmouse_handler = {
145 .name = "QEMU Microsoft Mouse",
146 .mask = INPUT_EVENT_MASK_BTN | INPUT_EVENT_MASK_REL,
147 .event = msmouse_input_event,
148 .sync = msmouse_input_sync,
149 };
150
151 static CharDriverState *qemu_chr_open_msmouse(const char *id,
152 ChardevBackend *backend,
153 ChardevReturn *ret,
154 bool *be_opened,
155 Error **errp)
156 {
157 ChardevCommon *common = backend->u.msmouse.data;
158 MouseState *mouse;
159 CharDriverState *chr;
160
161 chr = qemu_chr_alloc(common, errp);
162 if (!chr) {
163 return NULL;
164 }
165 chr->chr_write = msmouse_chr_write;
166 chr->chr_free = msmouse_chr_free;
167 chr->chr_accept_input = msmouse_chr_accept_input;
168 *be_opened = false;
169
170 mouse = g_new0(MouseState, 1);
171 mouse->hs = qemu_input_handler_register((DeviceState *)mouse,
172 &msmouse_handler);
173
174 mouse->chr = chr;
175 chr->opaque = mouse;
176
177 return chr;
178 }
179
180 static void register_types(void)
181 {
182 register_char_driver("msmouse", CHARDEV_BACKEND_KIND_MSMOUSE, NULL,
183 qemu_chr_open_msmouse);
184 }
185
186 type_init(register_types);