1.\" $NetBSD: soekrisgpio.4,v 1.5 2014/03/18 18:20:40 riastradh Exp $ 2.\" from OpenBSD 3.\" 4.\" Copyright (c) 2013 Matt Dainty <matt <at> bodgit-n-scarper.com> 5.\" 6.\" Permission to use, copy, modify, and distribute this software for any 7.\" purpose with or without fee is hereby granted, provided that the above 8.\" copyright notice and this permission notice appear in all copies. 9.\" 10.\" THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 11.\" WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 12.\" MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 13.\" ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 14.\" WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 15.\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 16.\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 17.\" 18.Dd June 10, 2013 19.Dt SOEKRIS 4 x86 20.Os 21.Sh NAME 22.Nm soekrisgpio 23.Nd Soekris net6501 GPIO and LEDs 24.Sh SYNOPSIS 25.Cd "soekrisgpio0 at isa? port 0x680" 26.Cd "gpio* at soekrisgpio?" 27.Sh DESCRIPTION 28The 29.Nm 30driver provides support for the GPIO and LEDs as implemented by the Xilinx 31Spartan FGPA integrated into the Soekris net6501 programmed with the default 32bitstream found in the BIOS. 33.Pp 34Two standard 35.Xr gpio 4 36interfaces are provided, one for the 16 real pins which can be configured as 37either inputs or outputs and another with 2 output-only pins that map 38to the error and ready LEDs respectively. 39Both may be used with 40.Xr gpioctl 8 . 41.Sh SEE ALSO 42.Xr gpio 4 , 43.Xr intro 4 , 44.Xr isa 4 , 45.Xr gpioctl 8 46.Sh HISTORY 47The 48.Nm 49driver first appeared in 50.Nx 7.0 . 51.Sh AUTHORS 52The 53.Nm 54driver was written by 55.An Matt Dainty Aq Mt matt@... 56and imported from a patch for 57.Ox 58to 59.Nx 60by 61.An Frank Kardel Aq Mt kardel@NetBSD.org . 62.Sh BUGS 63If the Xilinx FPGA is programmed with a different bitstream, the driver will 64likely not function. 65