284 lines
8.8 KiB
Groff
284 lines
8.8 KiB
Groff
.\" $NetBSD: wskbd.9,v 1.2 2001/10/22 08:21:33 wiz Exp $
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.\"
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.\" Copyright (c) 2001 The NetBSD Foundation, Inc.
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.\" All rights reserved.
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.\"
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.\" This code is derived from software contributed to The NetBSD Foundation
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.\" by Gregory McGarry.
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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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.\" 3. All advertising materials mentioning features or use of this software
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.\" must display the following acknowledgement:
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.\" This product includes software developed by the NetBSD
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.\" Foundation, Inc. and its contributors.
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.\" 4. Neither the name of The NetBSD Foundation nor the names of its
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.\" contributors may be used to endorse or promote products derived
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.\" from this software without specific prior written permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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.\" ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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.\" TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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.\" PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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.\" BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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.\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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.\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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.\" INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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.\" CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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.\" POSSIBILITY OF SUCH DAMAGE.
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.\"
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.Dd October 7, 2001
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.Dt WSKBD 9
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.Os
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.Sh NAME
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.Nm wskbd ,
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.Nm wskbd_input ,
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.Nm wskbd_rawinput ,
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.Nm wskbd_cnattach ,
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.Nm wskbd_cndetach ,
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.Nm wskbddevprint
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.Nd wscons keyboard support
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.Sh SYNOPSIS
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.Fd #include <dev/wscons/wsconsio.h>
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.Fd #include <dev/wscons/wskbdvar.h>
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.Fd #include <dev/wscons/wsksymdef.h>
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.Fd #include <dev/wscons/wsksymvar.h>
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.Ft void
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.Fn wskbd_input "struct device *kbddev" "u_int type" "int value"
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.Ft void
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.Fn wskbd_rawinput "struct device *kbddev" "u_char *buf" "int len"
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.Ft void
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.Fn wskbd_cnattach "const struct wskbd_consops *consops" "void *conscookie" \
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"const struct wskbd_mapdata *mapdata"
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.Ft void
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.Fn wskbd_cndetach ""
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.Ft int
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.Fn wskbddevprint "void *aux" "const char *pnp"
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.Sh DESCRIPTION
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The
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.Nm
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module is a component of the
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.Xr wscons 9
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framework to provide machine-indpendent keyboard support. Most of the
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support is provided by the
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.Xr wskbd 4
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device driver, which must be a child of the hardware device driver.
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.Sh DATA TYPES
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Keyboard drivers providing support for wscons keyboards will make use
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of the following data types:
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.Bl -tag -width compact
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.It Fa kbd_t
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An opaque type describing keyboard properties.
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.It Fa keysym_t
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The wscons keyboard-independent symbolic representation of the keypress.
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.It Fa struct wskbd_accessops
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A structure used to specify the keyboard access functions. All
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keyboards must provide this structure and pass it to the
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.Xr wskbd 4
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child device. It has the following members:
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.Bd -literal
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int (*enable)(void *, int);
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void (*set_leds)(void *, int);
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int (*ioctl)(void *v, u_long cmd, caddr_t data,
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int flag, struct proc *p);
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.Ed
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.Pp
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The
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.Fa enable
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member defines the function to be called to enable keypress passing to
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wscons. The
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.Fa set_leds
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member defined the function to be called to set the LEDs on the
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keyboard. The
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.Fa ioctl
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member defines the function to be called to perform keyboard-specific
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ioctl calls.
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.Pp
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There is a
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.Fa void *
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cookie provided by the keyboard driver associated with these
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functions, which is passed to them when they are invoked.
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.It Fa struct wskbd_consops
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A structure used to specify the keyboard console operations. All
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keyboards which can operate as a console must provide this structure
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and pass it to the
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.Xr wskbd 4
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child device. If the keyboard cannot be a console, it is not
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necessary to specify this structure. It has the following members:
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.Bd -literal
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void (*getc) __P((void *, u_int *, int *));
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void (*pollc) __P((void *, int));
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void (*bell) __P((void *, u_int, u_int, u_int));
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.Ed
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.Pp
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There is a
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.Fa void *
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cookie provided by the keyboard driver associated with these
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functions, which is passed to them when they are invoked.
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.It Fa struct wscons_keydesc
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A structure used to describe a keyboard mapping table to convert
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keyboard-specific keycodes to wscons keysyms. It has the
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following members:
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.Bd -literal
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kbd_t name; /* name of this map */
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kbd_t base; /* map this one is based on */
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int map_size; /* size of map */
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const keysym_t *map; /* the map itself */
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.Ed
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.It Fa struct wskbd_mapdata
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A structure used to describe the keyboard layout and operation to
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interpret the keyboard layout. it contains the following members:
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.Bd -literal
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const struct wscons_keydesc *keydesc;
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kbd_t layout;
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.Ed
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.It Fa struct wskbd_attach_args
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A structure used to attach the
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.Xr wskbd 4
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child device. It has the following members:
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.Bd -literal
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int console;
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const struct wskbd_mapdata *keymap;
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const struct wskbd_accessops *accessops;
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void *accesscookie;
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.Ed
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.El
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.Sh FUNCTIONS
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.Bl -tag -width compact
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.It Fn wskbd_input "kbddev" "type" "value"
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Pass the keypress of value
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.Fa value
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and type
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.Fa type
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to wscons keyboard driver. Valid values of
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.Fa type
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are:
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.Bl -tag -width compact
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.It WSCONS_EVENT_KEY_UP
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Key released.
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.It WSCONS_EVENT_KEY_DOWN
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Key pressed.
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.El
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.It Fn wskbd_rawinput "kbddev" "buf" "len"
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Pass the raw keypress in the buffer
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.Fa buf
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to the wscons keyboard driver. The buffer is
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.Fa len
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bytes long. This function should only be called if the kernel option
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.Em WSDISPLAY_COMPAT_RAWKBD
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is enabled.
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.It Fn wskbd_cnattach "consops" "conscookie" "mapdata"
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Attach this keyboard as the console input by specifying the console
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operations
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.Fa consops
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and the keyboard mapping table information in
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.Fa mapdata .
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The functions specified in
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.Fa consops
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will be called with
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.Fa conscookie
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as the first argument.
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.It Fn wskbd_cndetach ""
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Detach this keyboard as the console input.
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.It Fn wskbddevprint "aux" "pnp"
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The default wskbd printing routine used by
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.Fn config_found .
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(see
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.Xr autoconf 9 ) .
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.El
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.Sh AUTOCONFIGURATION
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Keyboard drivers which want to utilise the wskbd module must be a
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parent to the
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.Xr wskbd 4
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device and provide an attachment interface. To attach the
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.Xr wskbd 4
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device, the keyboard driver must allocate and populate a
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.Fa wskbd_attach_args
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structure with the supported operations and callbacks and call
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.Fn config_found
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to perform the attach (see
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.Xr autoconf 9 ) .
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.\" The
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.\" .Fa keymap
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.\" member points to the
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.\" .Em wskbd_mapdata
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.\" structure which describes the keycode mapping operations. The
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.\" .Fa accessops
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.\" member points to the
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.\" .Em wskbd_accessops
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.\" structure which describes the keyboard access operations.
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The
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.Fa console
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member is a boolean to indicate to wscons whether this keyboard will
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be used for console input.
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.Sh OPERATION
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If the keyboard belongs to the system console, it must register the
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.Fa wskbd_consops
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structure specifying the console operations via
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.Fn wskbd_cnattach
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at console attach time.
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.Pp
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When a keypress arrives from the keyboard, the keyboard driver must
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perform any necessary character decoding to wscons events and pass the
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events to wscons via
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.Fn wskbd_input .
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If the kernel is compiled with the option
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.Em WSDISPLAY_COMPAT_RAWKBD ,
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then the keyboard driver must also pass the raw keyboard data to
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wscons via
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.Fn wskbd_rawinput .
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.Pp
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The wscons framework calls back into the hardware driver by invoking
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the functions that are specified in the
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.Em accessops
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structure. The
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.Fn enable
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and
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.Fn set_leds
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functions are relatively simple and self-explanatory. The
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.Fn ioctl
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function is called by the wscons interface to perform
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keyboard-specific ioctl operations (see
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.Xr ioctl 2 ) .
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The argument
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.Fa cmd
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to the
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.Fn ioctl
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function specifies the specific command to perform using the data
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.Fa data .
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Valid commands are listed in
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.Pa sys/dev/wscons/wsconsio.h .
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.Sh CODE REFERENCES
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This section describes places within the
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.Nx
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source tree where actual code implementing or utilising the
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machine-independent wscons subsystem can be found. All pathnames are
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relative to
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.Pa /usr/src .
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.Pp
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The wscons subsystem is implemented within the directory
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.Pa sys/dev/wscons .
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The
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.Nm
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module itself is implement within the files
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.Pa sys/dev/wscons/wskbd.c
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and
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.Pa sys/dev/wscons/wskbdutil.c .
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.Xr ioctl 2
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operations are listed in
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.Pa sys/dev/wscons/wsconsio.h .
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.Sh SEE ALSO
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.Xr ioctl 2 ,
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.Xr autoconf 9 ,
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.Xr driver 9 ,
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.Xr intro 9 ,
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.Xr wsdisplay 9 ,
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.Xr wsmouse 9
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