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/*
* QEMU Microsoft serial mouse emulation
*
* Copyright (c) 2008 Lubomir Rintel
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include "qemu/osdep.h"
#include "qemu-common.h"
#include "sysemu/char.h"
#include "ui/console.h"
#include "ui/input.h"
#define MSMOUSE_LO6(n) ((n) & 0x3f)
#define MSMOUSE_HI2(n) (((n) & 0xc0) >> 6)
typedef struct {
Chardev parent;
QemuInputHandlerState *hs;
int axis[INPUT_AXIS__MAX];
bool btns[INPUT_BUTTON__MAX];
bool btnc[INPUT_BUTTON__MAX];
uint8_t outbuf[32];
int outlen;
} MouseChardev;
#define TYPE_CHARDEV_MSMOUSE "chardev-msmouse"
#define MOUSE_CHARDEV(obj) \
OBJECT_CHECK(MouseChardev, (obj), TYPE_CHARDEV_MSMOUSE)
static void msmouse_chr_accept_input(Chardev *chr)
{
MouseChardev *mouse = MOUSE_CHARDEV(chr);
int len;
len = qemu_chr_be_can_write(chr);
if (len > mouse->outlen) {
len = mouse->outlen;
}
if (!len) {
return;
}
qemu_chr_be_write(chr, mouse->outbuf, len);
mouse->outlen -= len;
if (mouse->outlen) {
memmove(mouse->outbuf, mouse->outbuf + len, mouse->outlen);
}
}
static void msmouse_queue_event(MouseChardev *mouse)
{
unsigned char bytes[4] = { 0x40, 0x00, 0x00, 0x00 };
int dx, dy, count = 3;
dx = mouse->axis[INPUT_AXIS_X];
mouse->axis[INPUT_AXIS_X] = 0;
dy = mouse->axis[INPUT_AXIS_Y];
mouse->axis[INPUT_AXIS_Y] = 0;
/* Movement deltas */
bytes[0] |= (MSMOUSE_HI2(dy) << 2) | MSMOUSE_HI2(dx);
bytes[1] |= MSMOUSE_LO6(dx);
bytes[2] |= MSMOUSE_LO6(dy);
/* Buttons */
bytes[0] |= (mouse->btns[INPUT_BUTTON_LEFT] ? 0x20 : 0x00);
bytes[0] |= (mouse->btns[INPUT_BUTTON_RIGHT] ? 0x10 : 0x00);
if (mouse->btns[INPUT_BUTTON_MIDDLE] ||
mouse->btnc[INPUT_BUTTON_MIDDLE]) {
bytes[3] |= (mouse->btns[INPUT_BUTTON_MIDDLE] ? 0x20 : 0x00);
mouse->btnc[INPUT_BUTTON_MIDDLE] = false;
count = 4;
}
if (mouse->outlen <= sizeof(mouse->outbuf) - count) {
memcpy(mouse->outbuf + mouse->outlen, bytes, count);
mouse->outlen += count;
} else {
/* queue full -> drop event */
}
}
static void msmouse_input_event(DeviceState *dev, QemuConsole *src,
InputEvent *evt)
{
MouseChardev *mouse = MOUSE_CHARDEV(dev);
InputMoveEvent *move;
InputBtnEvent *btn;
switch (evt->type) {
case INPUT_EVENT_KIND_REL:
move = evt->u.rel.data;
mouse->axis[move->axis] += move->value;
break;
case INPUT_EVENT_KIND_BTN:
btn = evt->u.btn.data;
mouse->btns[btn->button] = btn->down;
mouse->btnc[btn->button] = true;
break;
default:
/* keep gcc happy */
break;
}
}
static void msmouse_input_sync(DeviceState *dev)
{
MouseChardev *mouse = MOUSE_CHARDEV(dev);
Chardev *chr = CHARDEV(dev);
msmouse_queue_event(mouse);
msmouse_chr_accept_input(chr);
}
static int msmouse_chr_write(struct Chardev *s, const uint8_t *buf, int len)
{
/* Ignore writes to mouse port */
return len;
}
static void char_msmouse_finalize(Object *obj)
{
MouseChardev *mouse = MOUSE_CHARDEV(obj);
qemu_input_handler_unregister(mouse->hs);
}
static QemuInputHandler msmouse_handler = {
.name = "QEMU Microsoft Mouse",
.mask = INPUT_EVENT_MASK_BTN | INPUT_EVENT_MASK_REL,
.event = msmouse_input_event,
.sync = msmouse_input_sync,
};
static void msmouse_chr_open(Chardev *chr,
ChardevBackend *backend,
bool *be_opened,
Error **errp)
{
MouseChardev *mouse = MOUSE_CHARDEV(chr);
*be_opened = false;
mouse->hs = qemu_input_handler_register((DeviceState *)mouse,
&msmouse_handler);
}
static void char_msmouse_class_init(ObjectClass *oc, void *data)
{
ChardevClass *cc = CHARDEV_CLASS(oc);
cc->kind = CHARDEV_BACKEND_KIND_MSMOUSE;
cc->open = msmouse_chr_open;
cc->chr_write = msmouse_chr_write;
cc->chr_accept_input = msmouse_chr_accept_input;
}
static const TypeInfo char_msmouse_type_info = {
.name = TYPE_CHARDEV_MSMOUSE,
.parent = TYPE_CHARDEV,
.instance_size = sizeof(MouseChardev),
.instance_finalize = char_msmouse_finalize,
.class_init = char_msmouse_class_init,
};
static void register_types(void)
{
type_register_static(&char_msmouse_type_info);
}
type_init(register_types);
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