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https://github.com/xemu-project/xemu.git
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6b10e573d1
Suggested by Paolo Bonzini during series review. Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
191 lines
5.4 KiB
C
191 lines
5.4 KiB
C
/*
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* QEMU Microsoft serial mouse emulation
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*
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* Copyright (c) 2008 Lubomir Rintel
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "qemu/osdep.h"
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#include "qemu-common.h"
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#include "chardev/char.h"
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#include "ui/console.h"
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#include "ui/input.h"
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#define MSMOUSE_LO6(n) ((n) & 0x3f)
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#define MSMOUSE_HI2(n) (((n) & 0xc0) >> 6)
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typedef struct {
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Chardev parent;
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QemuInputHandlerState *hs;
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int axis[INPUT_AXIS__MAX];
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bool btns[INPUT_BUTTON__MAX];
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bool btnc[INPUT_BUTTON__MAX];
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uint8_t outbuf[32];
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int outlen;
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} MouseChardev;
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#define TYPE_CHARDEV_MSMOUSE "chardev-msmouse"
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#define MOUSE_CHARDEV(obj) \
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OBJECT_CHECK(MouseChardev, (obj), TYPE_CHARDEV_MSMOUSE)
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static void msmouse_chr_accept_input(Chardev *chr)
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{
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MouseChardev *mouse = MOUSE_CHARDEV(chr);
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int len;
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len = qemu_chr_be_can_write(chr);
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if (len > mouse->outlen) {
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len = mouse->outlen;
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}
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if (!len) {
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return;
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}
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qemu_chr_be_write(chr, mouse->outbuf, len);
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mouse->outlen -= len;
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if (mouse->outlen) {
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memmove(mouse->outbuf, mouse->outbuf + len, mouse->outlen);
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}
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}
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static void msmouse_queue_event(MouseChardev *mouse)
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{
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unsigned char bytes[4] = { 0x40, 0x00, 0x00, 0x00 };
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int dx, dy, count = 3;
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dx = mouse->axis[INPUT_AXIS_X];
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mouse->axis[INPUT_AXIS_X] = 0;
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dy = mouse->axis[INPUT_AXIS_Y];
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mouse->axis[INPUT_AXIS_Y] = 0;
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/* Movement deltas */
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bytes[0] |= (MSMOUSE_HI2(dy) << 2) | MSMOUSE_HI2(dx);
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bytes[1] |= MSMOUSE_LO6(dx);
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bytes[2] |= MSMOUSE_LO6(dy);
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/* Buttons */
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bytes[0] |= (mouse->btns[INPUT_BUTTON_LEFT] ? 0x20 : 0x00);
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bytes[0] |= (mouse->btns[INPUT_BUTTON_RIGHT] ? 0x10 : 0x00);
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if (mouse->btns[INPUT_BUTTON_MIDDLE] ||
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mouse->btnc[INPUT_BUTTON_MIDDLE]) {
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bytes[3] |= (mouse->btns[INPUT_BUTTON_MIDDLE] ? 0x20 : 0x00);
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mouse->btnc[INPUT_BUTTON_MIDDLE] = false;
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count = 4;
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}
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if (mouse->outlen <= sizeof(mouse->outbuf) - count) {
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memcpy(mouse->outbuf + mouse->outlen, bytes, count);
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mouse->outlen += count;
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} else {
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/* queue full -> drop event */
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}
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}
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static void msmouse_input_event(DeviceState *dev, QemuConsole *src,
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InputEvent *evt)
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{
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MouseChardev *mouse = MOUSE_CHARDEV(dev);
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InputMoveEvent *move;
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InputBtnEvent *btn;
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switch (evt->type) {
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case INPUT_EVENT_KIND_REL:
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move = evt->u.rel.data;
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mouse->axis[move->axis] += move->value;
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break;
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case INPUT_EVENT_KIND_BTN:
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btn = evt->u.btn.data;
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mouse->btns[btn->button] = btn->down;
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mouse->btnc[btn->button] = true;
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break;
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default:
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/* keep gcc happy */
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break;
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}
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}
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static void msmouse_input_sync(DeviceState *dev)
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{
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MouseChardev *mouse = MOUSE_CHARDEV(dev);
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Chardev *chr = CHARDEV(dev);
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msmouse_queue_event(mouse);
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msmouse_chr_accept_input(chr);
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}
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static int msmouse_chr_write(struct Chardev *s, const uint8_t *buf, int len)
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{
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/* Ignore writes to mouse port */
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return len;
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}
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static void char_msmouse_finalize(Object *obj)
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{
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MouseChardev *mouse = MOUSE_CHARDEV(obj);
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qemu_input_handler_unregister(mouse->hs);
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}
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static QemuInputHandler msmouse_handler = {
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.name = "QEMU Microsoft Mouse",
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.mask = INPUT_EVENT_MASK_BTN | INPUT_EVENT_MASK_REL,
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.event = msmouse_input_event,
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.sync = msmouse_input_sync,
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};
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static void msmouse_chr_open(Chardev *chr,
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ChardevBackend *backend,
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bool *be_opened,
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Error **errp)
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{
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MouseChardev *mouse = MOUSE_CHARDEV(chr);
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*be_opened = false;
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mouse->hs = qemu_input_handler_register((DeviceState *)mouse,
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&msmouse_handler);
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}
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static void char_msmouse_class_init(ObjectClass *oc, void *data)
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{
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ChardevClass *cc = CHARDEV_CLASS(oc);
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cc->open = msmouse_chr_open;
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cc->chr_write = msmouse_chr_write;
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cc->chr_accept_input = msmouse_chr_accept_input;
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}
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static const TypeInfo char_msmouse_type_info = {
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.name = TYPE_CHARDEV_MSMOUSE,
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.parent = TYPE_CHARDEV,
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.instance_size = sizeof(MouseChardev),
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.instance_finalize = char_msmouse_finalize,
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.class_init = char_msmouse_class_init,
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};
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static void register_types(void)
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{
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type_register_static(&char_msmouse_type_info);
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}
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type_init(register_types);
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