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.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