1.\" $OpenBSD: skgpio.4,v 1.2 2015/10/22 11:01:14 sobrado Exp $ 2.\" 3.\" Copyright (c) 2014 Matt Dainty <matt@bodgit-n-scarper.com> 4.\" 5.\" Permission to use, copy, modify, and distribute this software for any 6.\" purpose with or without fee is hereby granted, provided that the above 7.\" copyright notice and this permission notice appear in all copies. 8.\" 9.\" THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 10.\" WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 11.\" MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 12.\" ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 13.\" WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 14.\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 15.\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 16.\" 17.Dd $Mdocdate: October 22 2015 $ 18.Dt SKGPIO 4 i386 19.Os 20.Sh NAME 21.Nm skgpio 22.Nd Soekris net6501 GPIO and LEDs 23.Sh SYNOPSIS 24.Cd "skgpio0 at isa? port 0x680" 25.Cd "gpio* at skgpio?" 26.Sh DESCRIPTION 27The 28.Nm 29driver provides support for the GPIO and LEDs as implemented by the Xilinx 30Spartan FGPA integrated into the Soekris net6501 programmed with the default 31bitstream found in the BIOS. 32.Pp 33Two standard 34.Xr gpio 4 35interfaces are provided, one for the 16 real pins which can be configured as 36either inputs or outputs and another with 2 output-only pins that map 37to the error and ready LEDs respectively. 38Both may be used with 39.Xr gpioctl 8 . 40.Sh SEE ALSO 41.Xr gpio 4 , 42.Xr intro 4 , 43.Xr isa 4 , 44.Xr gpioctl 8 45.Sh HISTORY 46The 47.Nm 48driver first appeared in 49.Ox 5.7 . 50.Sh AUTHORS 51The 52.Nm 53driver was written by 54.An Matt Dainty Aq matt@bodgit-n-scarper.com . 55.Sh BUGS 56If the Xilinx FPGA is programmed with a different bitstream, the driver will 57likely not function. 58