Turn Chardev into Object. qemu_chr_alloc() is replaced by the qemu_chardev_new() constructor. It will call qemu_char_open() to open/intialize the chardev with the ChardevCommon *backend settings. The CharDriver::create() callback is turned into a ChardevClass::open() which is called from the newly introduced qemu_chardev_open(). "chardev-gdb" and "chardev-hci" are internal chardev and aren't creatable directly with -chardev. Use a new internal flag to disable them. We may want to use TYPE_USER_CREATABLE interface instead, or perhaps allow -chardev usage. Although in general we keep typename and macros private, unless the type is being used by some other file, in this patch, all types and common helper macros for qemu-char.c are in char.h. This is to help transition now (some types must be declared early, while some aren't shared) and when splitting in several units. This is to be improved later. Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
196 lines
5.5 KiB
C
196 lines
5.5 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 "sysemu/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 msmouse_chr_free(struct Chardev *chr)
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{
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MouseChardev *mouse = MOUSE_CHARDEV(chr);
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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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cc->chr_free = msmouse_chr_free;
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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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.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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static const CharDriver driver = {
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.kind = CHARDEV_BACKEND_KIND_MSMOUSE,
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};
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register_char_driver(&driver);
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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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