viafb: PLL value cleanup

This is a big change of how PLL values are handled on the road to
dynamic PLL value generation. The table was converted automatically in
the relevant parameters for frequency generation. Sadly there were some
bits set whose meaning is unknown. Those differences are documented
but ignored as the unichrome code implies that they are not important
(a big thanks to Luc for his amazing work).
The PLL values for 31490000 and 133308000 are deleted as they were more
than 5% off and not used anyway. The values for CX700@60466000 and
VX855@153920000 are corrected as they were wrong and easily correctable
as enough correct values was available because CX700 and VX855 support
the same values only with a little difference in hardware format.
All remaining values are not more than 2% off.
Additionally the surrounding code is changed as needed especially the
byte order of the values written to hardware to allow nicer conversion
functions.
This is mostly a change preparing for dynamic PLL generation and the two
corrected values aside no runtime change is expected.
Signed-off-by: NFlorian Tobias Schandinat <FlorianSchandinat@gmx.de>
Cc: Joseph Chan <JosephChan@via.com.tw>

Preparatory move toward the ultimate goal of moving pan-subdevice stuff
into include/linux.

Cc: ScottFang@viatech.com.cn
Cc: JosephChan@via.com.tw
Cc: Harald Welte <laforge@gnumonks.org>
Acked-by: NFlorian Tobias Schandinat <FlorianSchandinat@gmx.de>
Signed-off-by: NJonathan Corbet <corbet@lwn.net>

viafb: improve misc register handling

This patch improves the misc register handling by adding a modify
function for this to via_io.h and moving expanded definitions of the
relevant ports there. The code was changed to use those to improve
readability.
Signed-off-by: NFlorian Tobias Schandinat <FlorianSchandinat@gmx.de>

[jc: extensive merge conflict fixes]
Cc: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
Cc: ScottFang@viatech.com.cn
Cc: JosephChan@via.com.tw
Signed-off-by: NChris Ball <cjb@laptop.org>

Some code depended on IGA1_IGA2 which was never set (at least with the
symbolic name).  Remove this dead code although it might one day be useful
to get a hint on how some things might work.  However as this is dead it
is likely full of bugs and would prevent a clean structure (as it has some
very strange things).

Dead code -> no regressions, at least if VIA doesn't do anything very ugly.
Signed-off-by: NFlorian Tobias Schandinat <FlorianSchandinat@gmx.de>
Cc: Scott Fang <ScottFang@viatech.com.cn>
Cc: Joseph Chan <JosephChan@via.com.tw>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Remove the rest of the VIA_RES_* use cases.  Obviously this was no longer
useful.  Keep the related infrastructure/functions for later use.

No runtime impact expected.
Signed-off-by: NFlorian Tobias Schandinat <FlorianSchandinat@gmx.de>
Cc: Joseph Chan <JosephChan@via.com.tw>
Cc: Scott Fang <ScottFang@viatech.com.cn>
Cc: Krzysztof Helt <krzysztof.h1@poczta.fm>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Add support for a new VIA integrated graphics chipset, the VX855.
Signed-off-by: NHaraldWelte <HaraldWelte@viatech.com>
Signed-off-by: NFlorian Tobias Schandinat <FlorianSchandinat@gmx.de>
Cc: Scott Fang <ScottFang@viatech.com.cn>
Cc: Joseph Chan <JosephChan@via.com.tw>
Cc: Jonathan Corbet <corbet@lwn.net>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Makefile for drivers/video/via/
share.h: shared macro for viafb
Signed-off-by: NJoseph Chan <josephchan@via.com.tw>
Cc: Krzysztof Helt <krzysztof.h1@poczta.fm>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>