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-rw-r--r--src/atiadjust.c230
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diff --git a/src/atiadjust.c b/src/atiadjust.c
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--- a/src/atiadjust.c
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-/* $XFree86: xc/programs/Xserver/hw/xfree86/drivers/ati/atiadjust.c,v 1.15 2003/04/23 21:51:27 tsi Exp $ */
-/*
- * Copyright 1997 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 "atiadjust.h"
-#include "atichip.h"
-#include "aticrtc.h"
-#include "atilock.h"
-#include "atimach64io.h"
-#include "atiwonderio.h"
-
-/*
- * The display start address is expressed in units of 32-bit (VGA) or 64-bit
- * (accelerator) words where all planar modes are considered as 4bpp modes.
- * These functions ensure the start address does not exceed architectural
- * limits. Also, to avoid colour changes while panning, these 32-bit or 64-bit
- * boundaries may not fall within a pixel.
- */
-
-/*
- * ATIAjustPreInit --
- *
- * This function calculates values needed to speed up the setting of the
- * display start address.
- */
-void
-ATIAdjustPreInit
-(
- ATIPtr pATI
-)
-{
- unsigned long MaxBase;
-
-#ifndef AVOID_CPIO
-
- if ((pATI->CPIO_VGAWonder) &&
- (pATI->Chip <= ATI_CHIP_18800_1) &&
- (pATI->VideoRAM == 256) &&
- (pATI->depth >= 8))
- {
- /* Strange, to say the least ... */
- pATI->AdjustDepth = (pATI->bitsPerPixel + 3) >> 2;
- pATI->AdjustMask = (unsigned long)(-32);
- }
- else
-
-#endif /* AVOID_CPIO */
-
- {
- pATI->AdjustDepth = (pATI->bitsPerPixel + 7) >> 3;
-
- pATI->AdjustMask = 64;
- while (pATI->AdjustMask % (unsigned long)(pATI->AdjustDepth))
- pATI->AdjustMask += 64;
- pATI->AdjustMask =
- ~(((pATI->AdjustMask / (unsigned long)(pATI->AdjustDepth)) >> 3) -
- 1);
- }
-
- switch (pATI->NewHW.crtc)
- {
-
-#ifndef AVOID_CPIO
-
- case ATI_CRTC_VGA:
- if (pATI->Chip >= ATI_CHIP_264CT)
- {
- pATI->AdjustMaxBase = MaxBits(CRTC_OFFSET_VGA) << 2;
- if (pATI->depth <= 4)
- pATI->AdjustMaxBase <<= 1;
- }
- else if (!pATI->CPIO_VGAWonder)
- {
- pATI->AdjustMaxBase = 0xFFFFU << 3;
- }
- else if (pATI->Chip <= ATI_CHIP_28800_6)
- {
- pATI->AdjustMaxBase = 0x03FFFFU << 3;
- }
- else /* Mach32 & Mach64 */
- {
- pATI->AdjustMaxBase = 0x0FFFFFU << 3;
- }
- break;
-
-#endif /* AVOID_CPIO */
-
- case ATI_CRTC_MACH64:
- pATI->AdjustMaxBase = MaxBits(CRTC_OFFSET) << 3;
- break;
-
- default:
- pATI->AdjustMaxBase = 0;
- break;
- }
-
- MaxBase = (pATI->AdjustMaxBase / (unsigned long)pATI->AdjustDepth) |
- ~pATI->AdjustMask;
-
- pATI->AdjustMaxX = MaxBase % pATI->displayWidth;
- pATI->AdjustMaxY = MaxBase / pATI->displayWidth;
-}
-
-/*
- * ATIAdjustFrame --
- *
- * This function is used to initialise the SVGA Start Address - the first
- * displayed location in video memory. This is used to implement the virtual
- * window.
- */
-void
-ATIAdjustFrame
-(
- int scrnIndex,
- int x,
- int y,
- int flags
-)
-{
- ScrnInfoPtr pScreenInfo = xf86Screens[scrnIndex];
- ATIPtr pATI = ATIPTR(pScreenInfo);
- int Base, xy;
-
- /*
- * Assume the caller has already done its homework in ensuring the physical
- * screen is still contained in the virtual resolution.
- */
- if (y >= pATI->AdjustMaxY)
- {
- y = pATI->AdjustMaxY;
- if (x > pATI->AdjustMaxX)
- y--;
- }
-
- Base = ((((y * pATI->displayWidth) + x) & pATI->AdjustMask) *
- pATI->AdjustDepth) >> 3;
-
- if (!pATI->currentMode)
- {
- /*
- * Not in DGA. This reverse-calculates pScreenInfo->frame[XY][01] so
- * that the cursor does not move on mode switches.
- */
- xy = (Base << 3) / pATI->AdjustDepth;
- pScreenInfo->frameX0 = xy % pATI->displayWidth;
- pScreenInfo->frameY0 = xy / pATI->displayWidth;
- pScreenInfo->frameX1 =
- pScreenInfo->frameX0 + pScreenInfo->currentMode->HDisplay - 1;
- pScreenInfo->frameY1 =
- pScreenInfo->frameY0 + pScreenInfo->currentMode->VDisplay - 1;
- }
-
- /* Unlock registers */
- ATIUnlock(pATI);
-
-#ifndef AVOID_CPIO
-
- if ((pATI->NewHW.crtc == ATI_CRTC_VGA) && (pATI->Chip < ATI_CHIP_264CT))
- {
- PutReg(CRTX(pATI->CPIO_VGABase), 0x0CU, GetByte(Base, 1));
- PutReg(CRTX(pATI->CPIO_VGABase), 0x0DU, GetByte(Base, 0));
-
- if (pATI->CPIO_VGAWonder)
- {
- if (pATI->Chip <= ATI_CHIP_18800_1)
- ATIModifyExtReg(pATI, 0xB0U, -1, 0x3FU, Base >> 10);
- else
- {
- ATIModifyExtReg(pATI, 0xB0U, -1, 0xBFU, Base >> 10);
- ATIModifyExtReg(pATI, 0xA3U, -1, 0xEFU, Base >> 13);
-
- /*
- * I don't know if this also applies to Mach64's, but give it a
- * shot...
- */
- if (pATI->Chip >= ATI_CHIP_68800)
- ATIModifyExtReg(pATI, 0xADU, -1, 0xF3U, Base >> 16);
- }
- }
- }
- else
- /*
- * On integrated controllers, there is only one set of CRTC control bits,
- * many of which are simultaneously accessible through both VGA and
- * accelerator I/O ports. Given VGA's architectural limitations, setting
- * the CRTC's offset register to more than 256k needs to be done through
- * the accelerator port.
- */
- if (pATI->depth <= 4)
- {
- outr(CRTC_OFF_PITCH, SetBits(pATI->displayWidth >> 4, CRTC_PITCH) |
- SetBits(Base, CRTC_OFFSET));
- }
- else
-
-#endif /* AVOID_CPIO */
-
- {
-
-#ifndef AVOID_CPIO
-
- if (pATI->NewHW.crtc == ATI_CRTC_VGA)
- Base <<= 1; /* LSBit must be zero */
-
-#endif /* AVOID_CPIO */
-
- outr(CRTC_OFF_PITCH, SetBits(pATI->displayWidth >> 3, CRTC_PITCH) |
- SetBits(Base, CRTC_OFFSET));
- }
-}
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