1.\" $NetBSD: genfb.4,v 1.5 2019/07/26 10:52:03 wiz Exp $ 2.\" 3.\" Copyright (c) 2007 Michael Lorenz 4.\" All rights reserved. 5.\" 6.\" Redistribution and use in source and binary forms, with or without 7.\" modification, are permitted provided that the following conditions 8.\" are met: 9.\" 1. Redistributions of source code must retain the above copyright 10.\" notice, this list of conditions and the following disclaimer. 11.\" 2. Redistributions in binary form must reproduce the above copyright 12.\" notice, this list of conditions and the following disclaimer in the 13.\" documentation and/or other materials provided with the distribution. 14.\" 3. The name of the author may not be used to endorse or promote products 15.\" derived from this software without specific prior written permission. 16.\" 17.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 18.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 19.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 20.\" IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 21.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 22.\" BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 23.\" LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 24.\" AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 25.\" OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27.\" SUCH DAMAGE. 28.\" 29.Dd July 26, 2019 30.Dt GENFB 4 31.Os 32.Sh NAME 33.Nm genfb 34.Nd generic framebuffer console driver 35.Sh SYNOPSIS 36.Cd "genfb* at pci?" 37.Cd "genfb* at sbus?" 38.Cd "genfb* at intvid?" Pq mac68k 39.Cd "genfb* at macvid?" Pq mac68k 40.Cd "wsdisplay* at genfb?" 41.Sh DESCRIPTION 42The 43.Nm 44driver provides support for generic framebuffers that have no native driver. 45All it needs are some parameters to describe the framebuffer and an address. 46.Ss PCI 47When attaching to a 48.Xr pci 4 49bus the driver is configured via device properties: 50.Bl -tag -width Dv 51.It Dv width Pq Li uint32 52Width in pixels. 53.It Dv height Pq Li uint32 54Height in pixels. 55.It Dv stride Pq Li uint32 56Line size in bytes. 57.It Dv depth Pq Li uint32 58Bits per pixel. 59.It Dv is_console Pq Li bool 60If true, 61.Nm 62will try to become the system console. 63.It Dv address Pq Li uint32 64Bus address of the framebuffer. 65.El 66.Ss SBus 67When attaching to 68.Xr sbus 4 69all those parameters are retrieved from the firmware. 70.Ss mac68k 71All those parameters are configured with Mac OS, 72and retrieved from the boot loader. 73.Sh SEE ALSO 74.Xr mac68k/intro 4 , 75.Xr pci 4 , 76.Xr sbus 4 , 77.Xr wscons 4 , 78.Xr wsdisplay 4 79.Sh BUGS 80There is no way to change the color map even when the firmware supports it. 81The 82.Xr pci 4 83bus frontend has only been tested on macppc, i386, and amd64 and requires 84machine dependent code to pass the properties mentioned above. 85So far only macppc, i386, and amd64 provides them. 86