474 lines
11 KiB
Groff
474 lines
11 KiB
Groff
.\" Copyright 1997 John-Mark Gurney. All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY John-Mark Gurney AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" $FreeBSD$
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.\"
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.Dd March 25, 2014
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.Dt SYSMOUSE 4
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.Os
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.Sh NAME
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.Nm sysmouse
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.\" .Nd supplies mouse data from syscons for other applications
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.Nd virtualized mouse driver
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.Sh SYNOPSIS
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.In sys/mouse.h
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.In sys/consio.h
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.Sh DESCRIPTION
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The console driver, in conjunction with the mouse daemon
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.Xr moused 8 ,
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supplies mouse data to the user process in the standardized way via the
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.Nm
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driver.
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This arrangement makes it possible for the console and the user process
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(such as the
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.Tn X\ Window System )
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to share the mouse.
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.Pp
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The user process which wants to utilize mouse operation simply opens
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.Pa /dev/sysmouse
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with a
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.Xr open 2
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call and reads
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mouse data from the device via
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.Xr read 2 .
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Make sure that
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.Xr moused 8
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is running, otherwise the user process will not see any data coming from
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the mouse.
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.Pp
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.Ss Operation Levels
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The
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.Nm
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driver has two levels of operation.
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The current operation level can be referred to and changed via ioctl calls.
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.Pp
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The level zero, the basic level, is the lowest level at which the driver
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offers the basic service to user programs.
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The
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.Nm
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driver
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provides horizontal and vertical movement of the mouse
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and state of up to three buttons in the
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.Tn MouseSystems
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format as follows.
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.Pp
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.Bl -tag -width Byte_1 -compact
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.It Byte 1
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.Bl -tag -width bit_7 -compact
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.It bit 7
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Always one.
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.It bit 6..3
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Always zero.
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.It bit 2
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Left button status; cleared if pressed, otherwise set.
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.It bit 1
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Middle button status; cleared if pressed, otherwise set.
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Always one,
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if the device does not have the middle button.
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.It bit 0
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Right button status; cleared if pressed, otherwise set.
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.El
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.It Byte 2
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The first half of horizontal movement count in two's complement;
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\-128 through 127.
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.It Byte 3
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The first half of vertical movement count in two's complement;
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\-128 through 127.
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.It Byte 4
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The second half of the horizontal movement count in two's complement;
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\-128 through 127.
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To obtain the full horizontal movement count, add
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the byte 2 and 4.
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.It Byte 5
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The second half of the vertical movement count in two's complement;
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\-128 through 127.
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To obtain the full vertical movement count, add
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the byte 3 and 5.
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.El
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.Pp
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At the level one, the extended level, mouse data is encoded
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in the standard format
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.Dv MOUSE_PROTO_SYSMOUSE
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as defined in
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.Xr mouse 4 .
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.\" .Ss Acceleration
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.\" The
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.\" .Nm
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.\" driver can somewhat `accelerate' the movement of the pointing device.
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.\" The faster you move the device, the further the pointer
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.\" travels on the screen.
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.\" The driver has an internal variable which governs the effect of
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.\" the acceleration. Its value can be modified via the driver flag
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.\" or via an ioctl call.
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.Sh IOCTLS
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This section describes two classes of
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.Xr ioctl 2
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commands:
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commands for the
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.Nm
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driver itself, and commands for the console and the console control drivers.
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.Ss Sysmouse Ioctls
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There are a few commands for mouse drivers.
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General description of the commands is given in
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.Xr mouse 4 .
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Following are the features specific to the
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.Nm
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driver.
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.Pp
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.Bl -tag -width MOUSE -compact
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.It Dv MOUSE_GETLEVEL Ar int *level
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.It Dv MOUSE_SETLEVEL Ar int *level
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These commands manipulate the operation level of the mouse driver.
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.Pp
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.It Dv MOUSE_GETHWINFO Ar mousehw_t *hw
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Returns the hardware information of the attached device in the following
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structure.
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Only the
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.Va iftype
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field is guaranteed to be filled with the correct value in the current
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version of the
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.Nm
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driver.
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.Bd -literal
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typedef struct mousehw {
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int buttons; /* number of buttons */
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int iftype; /* I/F type */
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int type; /* mouse/track ball/pad... */
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int model; /* I/F dependent model ID */
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int hwid; /* I/F dependent hardware ID */
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} mousehw_t;
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.Ed
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.Pp
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The
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.Va buttons
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field holds the number of buttons detected by the driver.
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.Pp
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The
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.Va iftype
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is always
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.Dv MOUSE_IF_SYSMOUSE .
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.Pp
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The
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.Va type
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tells the device type:
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.Dv MOUSE_MOUSE ,
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.Dv MOUSE_TRACKBALL ,
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.Dv MOUSE_STICK ,
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.Dv MOUSE_PAD ,
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or
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.Dv MOUSE_UNKNOWN .
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.Pp
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The
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.Va model
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is always
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.Dv MOUSE_MODEL_GENERIC
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at the operation level 0.
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It may be
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.Dv MOUSE_MODEL_GENERIC
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or one of
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.Dv MOUSE_MODEL_XXX
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constants at higher operation levels.
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.Pp
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The
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.Va hwid
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is always zero.
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.Pp
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.It Dv MOUSE_GETMODE Ar mousemode_t *mode
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The command gets the current operation parameters of the mouse
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driver.
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.Bd -literal
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typedef struct mousemode {
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int protocol; /* MOUSE_PROTO_XXX */
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int rate; /* report rate (per sec) */
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int resolution; /* MOUSE_RES_XXX, -1 if unknown */
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int accelfactor; /* acceleration factor */
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int level; /* driver operation level */
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int packetsize; /* the length of the data packet */
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unsigned char syncmask[2]; /* sync. bits */
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} mousemode_t;
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.Ed
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.Pp
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The
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.Va protocol
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field tells the format in which the device status is returned
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when the mouse data is read by the user program.
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It is
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.Dv MOUSE_PROTO_MSC
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at the operation level zero.
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.Dv MOUSE_PROTO_SYSMOUSE
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at the operation level one.
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.Pp
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The
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.Va rate
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is always set to \-1.
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.Pp
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The
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.Va resolution
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is always set to \-1.
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.Pp
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The
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.Va accelfactor
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is always 0.
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.Pp
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The
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.Va packetsize
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field specifies the length of the data packet.
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It depends on the
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operation level.
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.Pp
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.Bl -tag -width level_0__ -compact
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.It Em level 0
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5 bytes
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.It Em level 1
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8 bytes
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.El
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.Pp
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The array
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.Va syncmask
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holds a bit mask and pattern to detect the first byte of the
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data packet.
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.Va syncmask[0]
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is the bit mask to be ANDed with a byte.
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If the result is equal to
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.Va syncmask[1] ,
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the byte is likely to be the first byte of the data packet.
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Note that this method of detecting the first byte is not 100% reliable;
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thus, it should be taken only as an advisory measure.
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.Pp
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.It Dv MOUSE_SETMODE Ar mousemode_t *mode
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The command changes the current operation parameters of the mouse driver
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as specified in
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.Ar mode .
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Only
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.Va level
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may be modifiable.
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Setting values in the other field does not generate
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error and has no effect.
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.\" .Pp
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.\" .It Dv MOUSE_GETVARS Ar mousevar_t *vars
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.\" .It Dv MOUSE_SETVARS Ar mousevar_t *vars
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.\" These commands are not supported by the
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.\" .Nm
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.\" driver.
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.Pp
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.It Dv MOUSE_READDATA Ar mousedata_t *data
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.It Dv MOUSE_READSTATE Ar mousedata_t *state
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These commands are not supported by the
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.Nm
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driver.
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.Pp
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.It Dv MOUSE_GETSTATUS Ar mousestatus_t *status
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The command returns the current state of buttons and
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movement counts in the structure as defined in
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.Xr mouse 4 .
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.El
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.Ss Console and Consolectl Ioctls
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The user process issues console
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.Fn ioctl
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calls to the current virtual console in order to control
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the mouse pointer.
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The console
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.Fn ioctl
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also provides a method for the user process to receive a
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.Xr signal 3
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when a button is pressed.
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.Pp
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The mouse daemon
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.Xr moused 8
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uses
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.Fn ioctl
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calls to the console control device
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.Pa /dev/consolectl
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to inform the console of mouse actions including mouse movement
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and button status.
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.Pp
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Both classes of
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.Fn ioctl
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commands are defined as
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.Dv CONS_MOUSECTL
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which takes the following argument.
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.Bd -literal
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struct mouse_info {
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int operation;
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union {
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struct mouse_data data;
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struct mouse_mode mode;
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struct mouse_event event;
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} u;
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};
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.Ed
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.Pp
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.Bl -tag -width operation -compact
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.It Va operation
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This can be one of
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.Pp
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.Bl -tag -width MOUSE_MOVEABS -compact
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.It Dv MOUSE_SHOW
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Enables and displays mouse cursor.
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.It Dv MOUSE_HIDE
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Disables and hides mouse cursor.
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.It Dv MOUSE_MOVEABS
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Moves mouse cursor to position supplied in
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.Va u.data .
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.It Dv MOUSE_MOVEREL
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Adds position supplied in
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.Va u.data
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to current position.
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.It Dv MOUSE_GETINFO
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Returns current mouse position in the current virtual console
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and button status in
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.Va u.data .
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.It Dv MOUSE_MODE
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This sets the
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.Xr signal 3
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to be delivered to the current process when a button is pressed.
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The signal to be delivered is set in
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.Va u.mode .
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.El
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.Pp
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The above operations are for virtual consoles.
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The operations defined
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below are for the console control device and are used by
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.Xr moused 8
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to pass mouse data to the console driver.
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.Pp
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.Bl -tag -width MOUSE_MOVEABS -compact
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.It Dv MOUSE_ACTION
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.It Dv MOUSE_MOTION_EVENT
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These operations take the information in
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.Va u.data
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and act upon it.
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Mouse data will be sent to the
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.Nm
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driver if it is open.
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.Dv MOUSE_ACTION
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also processes button press actions and sends signal to the process if
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requested or performs cut and paste operations
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if the current console is a text interface.
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.It Dv MOUSE_BUTTON_EVENT
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.Va u.data
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specifies a button and its click count.
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The console driver will
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use this information for signal delivery if requested or
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for cut and paste operations if the console is in text mode.
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.El
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.Pp
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.Dv MOUSE_MOTION_EVENT
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and
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.Dv MOUSE_BUTTON_EVENT
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are newer interface and are designed to be used together.
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They are intended to replace functions performed by
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.Dv MOUSE_ACTION
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alone.
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.Pp
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.It Va u
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This union is one of
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.Pp
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.Bl -tag -width data -compact
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.It Va data
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.Bd -literal
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struct mouse_data {
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int x;
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int y;
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int z;
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int buttons;
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};
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.Ed
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.Pp
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.Va x , y
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and
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.Va z
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represent movement of the mouse along respective directions.
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.Va buttons
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tells the state of buttons.
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It encodes up to 31 buttons in the bit 0 though
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the bit 30.
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If a button is held down, the corresponding bit is set.
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.Pp
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.It Va mode
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.Bd -literal
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struct mouse_mode {
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int mode;
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int signal;
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};
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.Ed
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.Pp
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The
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.Va signal
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field specifies the signal to be delivered to the process.
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It must be
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one of the values defined in
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.In signal.h .
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The
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.Va mode
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field is currently unused.
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.Pp
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.It Va event
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.Bd -literal
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struct mouse_event {
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int id;
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int value;
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};
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.Ed
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.Pp
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The
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.Va id
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field specifies a button number as in
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.Va u.data.buttons .
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Only one bit/button is set.
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The
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.Va value
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field
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holds the click count: the number of times the user has clicked the button
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successively.
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.Pp
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.El
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.El
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.Sh FILES
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.Bl -tag -width /dev/consolectl -compact
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.It Pa /dev/consolectl
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device to control the console
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.It Pa /dev/sysmouse
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virtualized mouse driver
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.It Pa /dev/ttyv%d
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virtual consoles
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.El
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.Sh SEE ALSO
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.Xr vidcontrol 1 ,
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.Xr ioctl 2 ,
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.Xr signal 3 ,
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.Xr mouse 4 ,
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.Xr moused 8
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.Sh HISTORY
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The
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.Nm
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driver first appeared in
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.Fx 2.2 .
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.Sh AUTHORS
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.An -nosplit
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This
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manual page was written by
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.An John-Mark Gurney Aq jmg@FreeBSD.org
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and
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.An Kazutaka Yokota Aq yokota@FreeBSD.org .
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