| /* |
| * 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" |
| |
| #define MSMOUSE_LO6(n) ((n) & 0x3f) |
| #define MSMOUSE_HI2(n) (((n) & 0xc0) >> 6) |
| |
| static void msmouse_event(void *opaque, |
| int dx, int dy, int dz, int buttons_state) |
| { |
| CharDriverState *chr = (CharDriverState *)opaque; |
| |
| unsigned char bytes[4] = { 0x40, 0x00, 0x00, 0x00 }; |
| |
| /* Movement deltas */ |
| bytes[0] |= (MSMOUSE_HI2(dy) << 2) | MSMOUSE_HI2(dx); |
| bytes[1] |= MSMOUSE_LO6(dx); |
| bytes[2] |= MSMOUSE_LO6(dy); |
| |
| /* Buttons */ |
| bytes[0] |= (buttons_state & 0x01 ? 0x20 : 0x00); |
| bytes[0] |= (buttons_state & 0x02 ? 0x10 : 0x00); |
| bytes[3] |= (buttons_state & 0x04 ? 0x20 : 0x00); |
| |
| /* We always send the packet of, so that we do not have to keep track |
| of previous state of the middle button. This can potentially confuse |
| some very old drivers for two button mice though. */ |
| qemu_chr_be_write(chr, bytes, 4); |
| } |
| |
| static int msmouse_chr_write (struct CharDriverState *s, const uint8_t *buf, int len) |
| { |
| /* Ignore writes to mouse port */ |
| return len; |
| } |
| |
| static void msmouse_chr_close (struct CharDriverState *chr) |
| { |
| g_free (chr); |
| } |
| |
| static CharDriverState *qemu_chr_open_msmouse(const char *id, |
| ChardevBackend *backend, |
| ChardevReturn *ret, |
| Error **errp) |
| { |
| ChardevCommon *common = qapi_ChardevDummy_base(backend->u.msmouse); |
| CharDriverState *chr; |
| |
| chr = qemu_chr_alloc(common, errp); |
| if (!chr) { |
| return NULL; |
| } |
| chr->chr_write = msmouse_chr_write; |
| chr->chr_close = msmouse_chr_close; |
| chr->explicit_be_open = true; |
| |
| qemu_add_mouse_event_handler(msmouse_event, chr, 0, "QEMU Microsoft Mouse"); |
| |
| return chr; |
| } |
| |
| static void register_types(void) |
| { |
| register_char_driver("msmouse", CHARDEV_BACKEND_KIND_MSMOUSE, NULL, |
| qemu_chr_open_msmouse); |
| } |
| |
| type_init(register_types); |