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freebsd-dev/sys/dev/syscons/sysmouse.c
Ed Schouten 5bbae50149 Reduce the default baud rate of PTY's to 9600. 
On RELENG_6 (and probably RELENG_7) we see our syscons windows and
pseudo-terminals have the following buffer sizes:

| LINE RAW CAN OUT IHIWT ILOWT OHWT LWT     COL STATE  SESS      PGID DISC
| ttyv0  0   0   0  7680  6720 2052 256       7 OCcl       1146  1146 term
| ttyp0  0   0   0  7680  6720 1296 256       0 OCc       82033 82033 term

These buffer sizes make no sense, because we often have much more output
than input, but I guess having higher input buffer sizes improves
guarantees of the system.

On MPSAFE TTY I just sent both the input and output buffer sizes to 7
KB, which is pretty big on a standard FreeBSD install with 8 syscons
windows and some PTY's. Reduce the baud rate to 9600 baud, which means
we now have the following buffer sizes:

|  LINE   INQ  CAN  LIN  LOW  OUTQ  USE  LOW   COL  SESS  PGID STATE
| ttyv0  1920    0    0  192  1984    0  199     7  2401  2401 Oil
| pts/0  1920    0    0  192  1984    0  199  5631  1305  2526 Oi

This is a lot smaller, but for pseudo-devices this should be good
enough. You need to do a lot of punching to fill up a 7.5 KB input
buffer. If it turns out things don't work out this way, we'll just
switch to 19200 baud.
2008-11-08 20:40:39 +00:00

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/*-
* Copyright (c) 1999 Kazutaka YOKOTA <yokota@zodiac.mech.utsunomiya-u.ac.jp>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer as
* the first lines of this file unmodified.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include "opt_syscons.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/priv.h>
#include <sys/serial.h>
#include <sys/tty.h>
#include <sys/kernel.h>
#include <sys/consio.h>
#include <sys/mouse.h>
#include <dev/syscons/syscons.h>
#ifndef SC_NO_SYSMOUSE
/* local variables */
static struct tty *sysmouse_tty;
static int mouse_level; /* sysmouse protocol level */
static mousestatus_t mouse_status;
static void
smdev_close(struct tty *tp)
{
mouse_level = 0;
}
static int
smdev_ioctl(struct tty *tp, u_long cmd, caddr_t data, struct thread *td)
{
mousehw_t *hw;
mousemode_t *mode;
switch (cmd) {
case MOUSE_GETHWINFO: /* get device information */
hw = (mousehw_t *)data;
hw->buttons = 10; /* XXX unknown */
hw->iftype = MOUSE_IF_SYSMOUSE;
hw->type = MOUSE_MOUSE;
hw->model = MOUSE_MODEL_GENERIC;
hw->hwid = 0;
return 0;
case MOUSE_GETMODE: /* get protocol/mode */
mode = (mousemode_t *)data;
mode->level = mouse_level;
switch (mode->level) {
case 0: /* emulate MouseSystems protocol */
mode->protocol = MOUSE_PROTO_MSC;
mode->rate = -1; /* unknown */
mode->resolution = -1; /* unknown */
mode->accelfactor = 0; /* disabled */
mode->packetsize = MOUSE_MSC_PACKETSIZE;
mode->syncmask[0] = MOUSE_MSC_SYNCMASK;
mode->syncmask[1] = MOUSE_MSC_SYNC;
break;
case 1: /* sysmouse protocol */
mode->protocol = MOUSE_PROTO_SYSMOUSE;
mode->rate = -1;
mode->resolution = -1;
mode->accelfactor = 0;
mode->packetsize = MOUSE_SYS_PACKETSIZE;
mode->syncmask[0] = MOUSE_SYS_SYNCMASK;
mode->syncmask[1] = MOUSE_SYS_SYNC;
break;
}
return 0;
case MOUSE_SETMODE: /* set protocol/mode */
mode = (mousemode_t *)data;
if (mode->level == -1)
; /* don't change the current setting */
else if ((mode->level < 0) || (mode->level > 1))
return EINVAL;
else
mouse_level = mode->level;
return 0;
case MOUSE_GETLEVEL: /* get operation level */
*(int *)data = mouse_level;
return 0;
case MOUSE_SETLEVEL: /* set operation level */
if ((*(int *)data < 0) || (*(int *)data > 1))
return EINVAL;
mouse_level = *(int *)data;
return 0;
case MOUSE_GETSTATUS: /* get accumulated mouse events */
*(mousestatus_t *)data = mouse_status;
mouse_status.flags = 0;
mouse_status.obutton = mouse_status.button;
mouse_status.dx = 0;
mouse_status.dy = 0;
mouse_status.dz = 0;
return 0;
#ifdef notyet
case MOUSE_GETVARS: /* get internal mouse variables */
case MOUSE_SETVARS: /* set internal mouse variables */
return ENODEV;
#endif
case MOUSE_READSTATE: /* read status from the device */
case MOUSE_READDATA: /* read data from the device */
return ENODEV;
}
return (ENOIOCTL);
}
static int
smdev_param(struct tty *tp, struct termios *t)
{
/*
* Set the output baud rate to zero. The mouse device supports
* no output, so we don't want to waste buffers.
*/
t->c_ispeed = TTYDEF_SPEED;
t->c_ospeed = B0;
return (0);
}
static struct ttydevsw smdev_ttydevsw = {
.tsw_flags = TF_NOPREFIX,
.tsw_close = smdev_close,
.tsw_ioctl = smdev_ioctl,
.tsw_param = smdev_param,
};
static void
sm_attach_mouse(void *unused)
{
sysmouse_tty = tty_alloc(&smdev_ttydevsw, NULL, NULL);
tty_makedev(sysmouse_tty, NULL, "sysmouse");
}
SYSINIT(sysmouse, SI_SUB_DRIVERS, SI_ORDER_MIDDLE, sm_attach_mouse, NULL);
int
sysmouse_event(mouse_info_t *info)
{
/* MOUSE_BUTTON?DOWN -> MOUSE_MSC_BUTTON?UP */
static int butmap[8] = {
MOUSE_MSC_BUTTON1UP | MOUSE_MSC_BUTTON2UP | MOUSE_MSC_BUTTON3UP,
MOUSE_MSC_BUTTON2UP | MOUSE_MSC_BUTTON3UP,
MOUSE_MSC_BUTTON1UP | MOUSE_MSC_BUTTON3UP,
MOUSE_MSC_BUTTON3UP,
MOUSE_MSC_BUTTON1UP | MOUSE_MSC_BUTTON2UP,
MOUSE_MSC_BUTTON2UP,
MOUSE_MSC_BUTTON1UP,
0,
};
u_char buf[8];
int x, y, z;
int i, flags = 0;
tty_lock(sysmouse_tty);
switch (info->operation) {
case MOUSE_ACTION:
mouse_status.button = info->u.data.buttons;
/* FALL THROUGH */
case MOUSE_MOTION_EVENT:
x = info->u.data.x;
y = info->u.data.y;
z = info->u.data.z;
break;
case MOUSE_BUTTON_EVENT:
x = y = z = 0;
if (info->u.event.value > 0)
mouse_status.button |= info->u.event.id;
else
mouse_status.button &= ~info->u.event.id;
break;
default:
goto done;
}
mouse_status.dx += x;
mouse_status.dy += y;
mouse_status.dz += z;
mouse_status.flags |= ((x || y || z) ? MOUSE_POSCHANGED : 0)
| (mouse_status.obutton ^ mouse_status.button);
flags = mouse_status.flags;
if (flags == 0 || !tty_opened(sysmouse_tty))
goto done;
/* the first five bytes are compatible with MouseSystems' */
buf[0] = MOUSE_MSC_SYNC
| butmap[mouse_status.button & MOUSE_STDBUTTONS];
x = imax(imin(x, 255), -256);
buf[1] = x >> 1;
buf[3] = x - buf[1];
y = -imax(imin(y, 255), -256);
buf[2] = y >> 1;
buf[4] = y - buf[2];
for (i = 0; i < MOUSE_MSC_PACKETSIZE; ++i)
ttydisc_rint(sysmouse_tty, buf[i], 0);
if (mouse_level >= 1) {
/* extended part */
z = imax(imin(z, 127), -128);
buf[5] = (z >> 1) & 0x7f;
buf[6] = (z - (z >> 1)) & 0x7f;
/* buttons 4-10 */
buf[7] = (~mouse_status.button >> 3) & 0x7f;
for (i = MOUSE_MSC_PACKETSIZE; i < MOUSE_SYS_PACKETSIZE; ++i)
ttydisc_rint(sysmouse_tty, buf[i], 0);
}
ttydisc_rint_done(sysmouse_tty);
done: tty_unlock(sysmouse_tty);
return (flags);
}
#endif /* !SC_NO_SYSMOUSE */
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