.\"
.\" Copyright (c) 2014 Kevin Lo
.\" All rights reserved.
.\"
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.\" $FreeBSD$
.\"
.Dd March 31, 2017
.Dt ULED 4
.Os
.Sh NAME
.Nm uled
.Nd USB LED driver
.Sh SYNOPSIS
To compile this driver into the kernel, place the following lines into
your kernel configuration file:
.Bd -ragged -offset indent
.Cd "device uled"
.Cd "device usb"
.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
uled_load="YES"
.Ed
.Sh DESCRIPTION
The
.Nm
driver provides support for Dream Cheeky WebMail Notifier and
ThingM blink(1) notification LED.
.Pp
Subsequently, the
.Pa /dev/uled0
device can be used by userland applications.
.Sh IOCTLS
The following
.Xr ioctl 2
commands can be performed on
.Pa /dev/uled0 ,
which are defined in
.In dev/usb/uled_ioctl.h :
.Bl -tag -width indent
.It Dv ULED_GET_COLOR
The command returns LED colors with values for RGB.
This
.Xr ioctl 2
takes the following structure:
.Bd -literal
struct uled_color {
	uint8_t	red;
	uint8_t	green;
	uint8_t	blue;
};
.Ed
.It Dv ULED_SET_COLOR
The command sets LED colors with values for RGB.
It uses the same structure as above.
.El
.Sh FILES
.Bl -tag -width ".Pa /dev/uled0" -compact
.It Pa /dev/uled0
blocking device node
.El
.Sh SEE ALSO
.Xr ohci 4 ,
.Xr uhci 4 ,
.Xr usb 4
.Sh AUTHORS
.An -nosplit
The
.Nm
driver was written by
.An Kevin Lo Aq Mt kevlo@FreeBSD.org .