/*
* linux/drivers/video/sstfb.c -- voodoo graphics frame buffer
*
* Copyright (c) 2000-2002 Ghozlane Toumi <gtoumi@laposte.net>
*
* Created 15 Jan 2000 by Ghozlane Toumi
*
* Contributions (and many thanks) :
*
* 03/2001 James Simmons <jsimmons@infradead.org>
* 04/2001 Paul Mundt <lethal@chaoticdreams.org>
* 05/2001 Urs Ganse <ursg@uni.de>
* (initial work on voodoo2 port, interlace)
* 09/2002 Helge Deller <deller@gmx.de>
* (enable driver on big-endian machines (hppa), ioctl fixes)
* 12/2002 Helge Deller <deller@gmx.de>
* (port driver to new frambuffer infrastructure)
* 01/2003 Helge Deller <deller@gmx.de>
* (initial work on fb hardware acceleration for voodoo2)
* 08/2006 Alan Cox <alan@redhat.com>
* Remove never finished and bogus 24/32bit support
* Clean up macro abuse
* Minor tidying for format.
* 12/2006 Helge Deller <deller@gmx.de>
* add /sys/class/graphics/fbX/vgapass sysfs-interface
* add module option "mode_option" to set initial screen mode
* use fbdev default videomode database
* remove debug functions from ioctl
*/
/*
* The voodoo1 has the following memory mapped address space:
* 0x000000 - 0x3fffff : registers (4MB)
* 0x400000 - 0x7fffff : linear frame buffer (4MB)
* 0x800000 - 0xffffff : texture memory (8MB)
*/
/*
* misc notes, TODOs, toASKs, and deep thoughts
-TODO: at one time or another test that the mode is acceptable by the monitor
-ASK: Can I choose different ordering for the color bitfields (rgba argb ...)
which one should i use ? is there any preferred one ? It seems ARGB is
the one ...
-TODO: in set_var check the validity of timings (hsync vsync)...
-TODO: check and recheck the use of sst_wait_idle : we don't flush the fifo via
a nop command. so it's ok as long as the commands we pass don't go
through the fifo. warning: issuing a nop command seems to need pci_fifo
-FIXME: in case of failure in the init sequence, be sure we return to a safe
state.
- FIXME: Use accelerator for 2D scroll
-FIXME: 4MB boards have banked memory (FbiInit2 bits 1 & 20)
*/
/*
* debug info
* SST_DEBUG : enable debugging
