cde8dcbc92
Add struct to track serial mouse state. Store mouse event handler there. Unregister properly on chardev close. Signed-off-by: Gerd Hoffmann <kraxel@redhat.com> Acked-by: Paolo Bonzini <pbonzini@redhat.com> Message-id: 1467625375-31774-2-git-send-email-kraxel@redhat.com
106 lines
3.4 KiB
C
106 lines
3.4 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 "sysemu/char.h"
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#include "ui/console.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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CharDriverState *chr;
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QEMUPutMouseEntry *entry;
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} MouseState;
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static void msmouse_event(void *opaque,
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int dx, int dy, int dz, int buttons_state)
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{
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CharDriverState *chr = (CharDriverState *)opaque;
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unsigned char bytes[4] = { 0x40, 0x00, 0x00, 0x00 };
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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] |= (buttons_state & 0x01 ? 0x20 : 0x00);
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bytes[0] |= (buttons_state & 0x02 ? 0x10 : 0x00);
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bytes[3] |= (buttons_state & 0x04 ? 0x20 : 0x00);
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/* We always send the packet of, so that we do not have to keep track
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of previous state of the middle button. This can potentially confuse
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some very old drivers for two button mice though. */
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qemu_chr_be_write(chr, bytes, 4);
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}
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static int msmouse_chr_write (struct CharDriverState *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_close (struct CharDriverState *chr)
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{
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MouseState *mouse = chr->opaque;
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qemu_remove_mouse_event_handler(mouse->entry);
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g_free(mouse);
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g_free(chr);
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}
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static CharDriverState *qemu_chr_open_msmouse(const char *id,
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ChardevBackend *backend,
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ChardevReturn *ret,
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Error **errp)
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{
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ChardevCommon *common = backend->u.msmouse.data;
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MouseState *mouse;
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CharDriverState *chr;
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chr = qemu_chr_alloc(common, errp);
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chr->chr_write = msmouse_chr_write;
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chr->chr_close = msmouse_chr_close;
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chr->explicit_be_open = true;
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mouse = g_new0(MouseState, 1);
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mouse->entry = qemu_add_mouse_event_handler(msmouse_event, chr, 0,
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"QEMU Microsoft Mouse");
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mouse->chr = chr;
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chr->opaque = mouse;
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return chr;
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}
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static void register_types(void)
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{
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register_char_driver("msmouse", CHARDEV_BACKEND_KIND_MSMOUSE, NULL,
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qemu_chr_open_msmouse);
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}
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type_init(register_types);
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