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Diffstat (limited to 'src/atiwonderio.c')
-rw-r--r-- | src/atiwonderio.c | 86 |
1 files changed, 0 insertions, 86 deletions
diff --git a/src/atiwonderio.c b/src/atiwonderio.c deleted file mode 100644 index 064e49e..0000000 --- a/src/atiwonderio.c +++ /dev/null @@ -1,86 +0,0 @@ -/* $XFree86: xc/programs/Xserver/hw/xfree86/drivers/ati/atiwonderio.c,v 1.4 2003/01/01 19:16:35 tsi Exp $ */ -/* - * Copyright 2000 through 2003 by Marc Aurele La France (TSI @ UQV), tsi@xfree86.org - * - * Permission to use, copy, modify, distribute, and sell this software and its - * documentation for any purpose is hereby granted without fee, provided that - * the above copyright notice appear in all copies and that both that copyright - * notice and this permission notice appear in supporting documentation, and - * that the name of Marc Aurele La France not be used in advertising or - * publicity pertaining to distribution of the software without specific, - * written prior permission. Marc Aurele La France makes no representations - * about the suitability of this software for any purpose. It is provided - * "as-is" without express or implied warranty. - * - * MARC AURELE LA FRANCE DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, - * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO - * EVENT SHALL MARC AURELE LA FRANCE BE LIABLE FOR ANY SPECIAL, INDIRECT OR - * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, - * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER - * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR - * PERFORMANCE OF THIS SOFTWARE. - */ - -#include "ati.h" -#include "atichip.h" -#include "atiwonderio.h" - -#ifndef AVOID_CPIO - -/* - * ATIModifyExtReg -- - * - * This function is called to modify certain bits in an ATI extended VGA - * register while preserving its other bits. The function will not write the - * register if it turns out its value would not change. This helps prevent - * server hangs on older adapters. - */ -void -ATIModifyExtReg -( - ATIPtr pATI, - const CARD8 Index, - int CurrentValue, - const CARD8 CurrentMask, - CARD8 NewValue -) -{ - /* Possibly retrieve the current value */ - if (CurrentValue < 0) - CurrentValue = ATIGetExtReg(Index); - - /* Compute new value */ - NewValue &= (CARD8)(~CurrentMask); - NewValue |= CurrentValue & CurrentMask; - - /* Check if value will be changed */ - if (CurrentValue == NewValue) - return; - - /* - * The following is taken from ATI's VGA Wonder programmer's reference - * manual which says that this is needed to "ensure the proper state of the - * 8/16 bit ROM toggle". I suspect a timing glitch appeared in the 18800 - * after its die was cast. 18800-1 and later chips do not exhibit this - * problem. - */ - if ((pATI->Chip <= ATI_CHIP_18800) && (Index == 0xB2U) && - ((NewValue ^ 0x40U) & CurrentValue & 0x40U)) - { - CARD8 misc = inb(R_GENMO); - CARD8 bb = ATIGetExtReg(0xBBU); - - outb(GENMO, (misc & 0xF3U) | 0x04U | ((bb & 0x10U) >> 1)); - CurrentValue &= (CARD8)(~0x40U); - ATIPutExtReg(0xB2U, CurrentValue); - ATIDelay(5); - outb(GENMO, misc); - ATIDelay(5); - if (CurrentValue != NewValue) - ATIPutExtReg(0xB2U, NewValue); - } - else - ATIPutExtReg(Index, NewValue); -} - -#endif /* AVOID_CPIO */ |