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add superio.4 and superio.9 manual pages

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This adds basic documentation on what the superio driver is and how
other drivers can interact with it.  I decided to also document
superio's ivar accessors.

Reviewed by:	bcr, brueffer (both manual contents only)
MFC after:	2 weeks
Differential Revision:	https://reviews.freebsd.org/D21958
This commit is contained in:
Andriy Gapon 2019-10-11 11:13:47 +00:00
parent 8694561d5d
commit c812bea351
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=353432
4 changed files with 322 additions and 0 deletions
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2
share/man/man4/Makefile
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@ -504,6 +504,7 @@ MAN= aac.4 \
ste.4 \
stf.4 \
stge.4 \
${_superio.4} \
sym.4 \
syncache.4 \
syncer.4 \
@ -816,6 +817,7 @@ _padlock.4= padlock.4
_rr232x.4= rr232x.4
_speaker.4= speaker.4
_spkr.4= spkr.4
_superio.4= superio.4
_tpm.4= tpm.4
_urtw.4= urtw.4
_viawd.4= viawd.4

111
share/man/man4/superio.4 Normal file
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@ -0,0 +1,111 @@
.\"
.\" SPDX-License-Identifier: BSD-2-Clause-FreeBSD
.\"
.\" Copyright (c) 2019 Andriy Gapon <avg@FreeBSD.org>
.\"
.\" 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.
.\" 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 AUTHOR AND CONTRIBUTORS ``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 AUTHOR OR CONTRIBUTORS 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.
.\"
.\" $FreeBSD$
.\"
.Dd October 11, 2019
.Dt SUPERIO 4
.Os
.Sh NAME
.Nm superio
.Nd Super I/O controller and bus driver
.Sh SYNOPSIS
To compile this driver into the kernel,
place the following line in your
kernel configuration file:
.Bd -ragged -offset indent
.Cd "device superio"
.Ed
.Pp
Alternatively, to load the driver as a
module at boot time, place the following line in
.Xr loader.conf 5 :
.Bd -literal -offset indent
superio_load="YES"
.Ed
.Sh DESCRIPTION
Super I/O is an I/O controller that combines various low-bandwidth devices
that can be functionally unrelated otherwise.
A typical Super I/O can contain devices such as
.Bl -bullet -compact
.It
a floppy disk controller
.It
a parallel port
.It
a serial port
.It
a PS/2 mouse and keyboard controller
.It
a hardware monitoring controller
.It
a watchdog timer
.It
a controller for general purpose input-output
.El
.Pp
The
.Nm
driver provides support for devices residing in the Super I/O controller
that can only be accessed or discovered using the controller's interface.
Some of the Super I/O devices have standardized interfaces.
Such devices either use well-known legacy resources or they are advertised
via ACPI or both.
They can be configured either using ISA bus hints or they are auto-aconfigured by
.Xr acpi 4 .
The
.Nm
driver is not designed to interact with that kind of devices.
They can be handled by their respective drivers without any knowledge of the
Super I/O specifics.
For instance,
.Xr fdc 4
provides access to the floppy disk controller.
.Pp
There are other Super I/O devices that do not have any standardized interface.
Drivers for those devices can be written using facilities of the
.Nm
driver.
.Pp
The driver itself attaches to the ISA bus as all supported controllers are
accessed via LPC I/O ports.
.Pp
The
.Nm
driver is unusual as it is both a controller driver for a variety of Super I/O
controllers and a bus driver for supported devices in those controllers.
.Sh HARDWARE
The
.Nm
driver supports a multitude of Super I/O controllers produced by Nuvoton,
formerly known as Winbond, and ITE.
.Sh SEE ALSO
.Xr superio 9
.Sh HISTORY
The
.Nm
driver was written by
.An Andriy Gapon Aq Mt avg@FreeBSD.org .

20
share/man/man9/Makefile
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@ -301,6 +301,7 @@ MAN= accept_filter.9 \
store.9 \
style.9 \
style.lua.9 \
${_superio.9} \
swi.9 \
sx.9 \
syscall_helper_register.9 \
@ -2309,4 +2310,23 @@ MLINKS+=zone.9 uma.9 \
zone.9 uma_zone_set_warning.9 \
zone.9 uma_zsecond_create.9
.if ${MACHINE_CPUARCH} == "amd64" || ${MACHINE_CPUARCH} == "i386"
_superio.9= superio.9
MLINKS+=superio.9 superio_devid.9 \
superio.9 superio_dev_disable.9 \
superio.9 superio_dev_enable.9 \
superio.9 superio_dev_enabled.9 \
superio.9 superio_find_dev.9 \
superio.9 superio_find_dev.9 \
superio.9 superio_get_dma.9 \
superio.9 superio_get_iobase.9 \
superio.9 superio_get_irq.9 \
superio.9 superio_get_ldn.9 \
superio.9 superio_get_type.9 \
superio.9 superio_read.9 \
superio.9 superio_revid.9 \
superio.9 superio_vendor.9 \
superio.9 superio_write.9
.endif
.include <bsd.prog.mk>

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share/man/man9/superio.9 Normal file
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@ -0,0 +1,189 @@
.\"
.\" SPDX-License-Identifier: BSD-2-Clause-FreeBSD
.\"
.\" Copyright (c) 2019 Andriy Gapon <avg@FreeBSD.org>
.\"
.\" 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.
.\" 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 AUTHOR AND CONTRIBUTORS ``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 AUTHOR OR CONTRIBUTORS 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.
.\"
.\" $FreeBSD$
.\"
.Dd October 11, 2019
.Dt SUPERIO 9
.Os
.Sh NAME
.Nm superio ,
.Nm superio_devid ,
.Nm superio_dev_disable ,
.Nm superio_dev_enable ,
.Nm superio_dev_enabled ,
.Nm superio_find_dev ,
.Nm superio_get_dma ,
.Nm superio_get_iobase ,
.Nm superio_get_irq ,
.Nm superio_get_ldn ,
.Nm superio_get_type ,
.Nm superio_read ,
.Nm superio_revid ,
.Nm superio_vendor ,
.Nm superio_write
.Nd Super I/O bus interface
.Sh SYNOPSIS
.In sys/bus.h
.In dev/superio/superio.h
.Ft uint16_t
.Fn superio_devid "device_t dev"
.Ft void
.Fn superio_dev_disable "device_t dev" "uint8_t mask"
.Ft void
.Fn superio_dev_enable "device_t dev" "uint8_t mask"
.Ft bool
.Fn superio_dev_enabled "device_t dev" "uint8_t mask"
.Ft device_t
.Fn superio_find_dev "device_t dev" "superio_dev_type_t type" "int ldn"
.Ft uint8_t
.Fn superio_get_dma "device_t dev"
.Ft uint16_t
.Fn superio_get_iobase "device_t dev"
.Ft uint8_t
.Fn superio_get_irq "device_t dev"
.Ft uint8_t
.Fn superio_get_ldn "device_t dev"
.Ft superio_dev_type_t
.Fn superio_get_type "device_t dev"
.Ft uint8_t
.Fn superio_read "device_t dev" "uint8_t reg"
.Ft uint8_t
.Fn superio_revid "device_t dev"
.Ft superio_vendor_t
.Fn superio_vendor "device_t dev"
.Ft void
.Fn superio_write "device_t dev" "uint8_t reg" "uint8_t val"
.Sh DESCRIPTION
The
.Nm
set of functions are used for managing Super I/O devices.
The functions provide support for
raw configuration access,
locating devices,
device information,
and
device configuration.
.Ss The controller interface
The
.Fn superio_vendor
function is used to get a vendor of the Super I/O controller
.Fa dev .
Possible return values are
.Dv SUPERIO_VENDOR_ITE
and
.Dv SUPERIO_VENDOR_NUVOTON .
.Pp
The
.Fn superio_devid
function is used to get a device ID of the Super I/O controller
.Fa dev .
.Pp
The
.Fn superio_revid
function is used to get a revision ID of the Super I/O controller
.Fa dev .
.Pp
The
.Fn superio_find_dev
function is used to find a device on the
.Xr superio 4
bus, specified by
.Fa dev ,
that has the requested type and logical device number.
Either of those, but not both, can be a wildcard.
Supported types are
.Dv SUPERIO_DEV_GPIO ,
.Dv SUPERIO_DEV_HWM ,
and
.Dv SUPERIO_DEV_WDT .
The wildcard value for
.Fa type
is
.Dv SUPERIO_DEV_NONE .
The wildcard value for
.Fa ldn
is -1.
.Ss The device interface
The
.Fn superio_read
function is used to read data from the Super I/O configuration register
of the device
.Fa dev .
.Pp
The
.Fn superio_write
function is used to write data to the Super I/O configuration register
of the device
.Fa dev .
.Pp
The
.Fn superio_dev_enable ,
.Fn superio_dev_disable ,
and
.Fn superio_dev_enabled
functions are used to enable, disable, or check status of the device
.Fa dev .
The
.Fa mask
parameter selects sub-functions of a device that supports them.
For devices that do not have sub-functions,
.Fa mask
should be set to 1.
.Ss The accessor interface
The
.Fn superio_get_dma
is used to get a DMA channel number configured for the device
.Fa dev .
.Pp
The
.Fn superio_get_iobase
is used to get a base I/O port configured for the device
.Fa dev .
The device may expose additional or alternative configuration access via
the I/O ports.
.Pp
The
.Fn superio_get_irq
is used to get an interrupt number configured for the device
.Fa dev .
.Pp
The
.Fn superio_get_ldn
is used to get a Logical Device Number of the device
.Fa dev .
.Pp
The
.Fn superio_get_type
is used to get a type of the device
.Fa dev .
.Sh SEE ALSO
.Xr superio 4 ,
.Xr device 9 ,
.Xr driver 9
.Sh AUTHORS
This manual page was written by
.An Andriy Gapon Mt avg@FreeBSD.org