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/* $XFree86: xc/programs/Xserver/hw/xfree86/drivers/ati/atiwonder.c,v 1.14 2003/01/01 19:16:35 tsi Exp $ */
/*
* Copyright 1997 through 2004 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.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
/*
* The ATI x8800 chips use special registers for their extended VGA features.
* These registers are accessible through an index I/O port and a data I/O
* port. BIOS initialisation stores the index port number in the Graphics
* register bank (0x03CE), indices 0x50 and 0x51. Unfortunately, for all but
* the 18800-x series of adapters, these registers are write-only (a.k.a. black
* holes). On all but 88800's, the index port number can be found in the short
* integer at offset 0x10 in the BIOS. For 88800's, this driver will use
* 0x01CE or 0x03CE as the index port number, depending on the I/O port
* decoding used. The data port number is one more than the index port number
* (i.e. 0x01CF). These ports differ slightly in their I/O behaviour from the
* normal VGA ones:
*
* write: outw(0x01CE, (data << 8) | index); (16-bit, not used)
* outb(0x01CE, index); outb(0x01CF, data); (8-bit)
* read: outb(0x01CE, index); data = inb(0x01CF);
*
* Two consecutive byte-writes to the data port will not work. Furthermore an
* index written to 0x01CE is usable only once. Note also that the setting of
* ATI extended registers (especially those with clock selection bits) should
* be bracketed by a sequencer reset.
*
* The number of these extended VGA registers varies by chipset. The 18800
* series have 16, the 28800 series have 32, while 68800's and 88800's have 64.
* The last 16 on each have almost identical definitions. Thus, the BIOS sets
* up an indexing scheme whereby the last 16 extended VGA registers are
* accessed at indices 0xB0 through 0xBF on all chipsets.
*/
#include "ati.h"
#include "atichip.h"
#include "atiwonder.h"
#include "atiwonderio.h"
#ifndef AVOID_CPIO
/*
* ATIVGAWonderPreInit --
*
* This function is called to initialise the VGA Wonder part of an ATIHWRec
* that is common to all modes generated by the driver.
*/
void
ATIVGAWonderPreInit
(
ATIPtr pATI,
ATIHWPtr pATIHW
)
{
pATIHW->b3 = ATIGetExtReg(0xB3U) & 0x20U;
pATIHW->b6 = 0x04U;
if (pATI->VideoRAM > 256)
pATIHW->b6 |= 0x01U;
pATIHW->bf = ATIGetExtReg(0xBFU) & 0x5FU;
pATIHW->a3 = ATIGetExtReg(0xA3U) & 0x67U;
pATIHW->ab = ATIGetExtReg(0xABU) & 0xE7U;
pATIHW->ae = ATIGetExtReg(0xAEU) & 0xE0U;
}
/*
* ATIVGAWonderSave --
*
* This function is called to save the VGA Wonder portion of the current video
* state.
*/
void
ATIVGAWonderSave
(
ATIPtr pATI,
ATIHWPtr pATIHW
)
{
pATIHW->b0 = ATIGetExtReg(0xB0U);
pATIHW->b1 = ATIGetExtReg(0xB1U);
pATIHW->b2 = ATIGetExtReg(0xB2U);
pATIHW->b3 = ATIGetExtReg(0xB3U);
pATIHW->b5 = ATIGetExtReg(0xB5U);
pATIHW->b6 = ATIGetExtReg(0xB6U);
pATIHW->b8 = ATIGetExtReg(0xB8U);
pATIHW->b9 = ATIGetExtReg(0xB9U);
pATIHW->ba = ATIGetExtReg(0xBAU);
pATIHW->bd = ATIGetExtReg(0xBDU);
pATIHW->be = ATIGetExtReg(0xBEU);
pATIHW->bf = ATIGetExtReg(0xBFU);
pATIHW->a3 = ATIGetExtReg(0xA3U);
pATIHW->a6 = ATIGetExtReg(0xA6U);
pATIHW->a7 = ATIGetExtReg(0xA7U);
pATIHW->ab = ATIGetExtReg(0xABU);
pATIHW->ac = ATIGetExtReg(0xACU);
pATIHW->ad = ATIGetExtReg(0xADU);
pATIHW->ae = ATIGetExtReg(0xAEU);
}
/*
* ATIVGAWonderCalculate --
*
* This function fills in the VGA Wonder portion of an ATIHWRec structure
* occurrence.
*/
void
ATIVGAWonderCalculate
(
ATIPtr pATI,
ATIHWPtr pATIHW,
DisplayModePtr pMode
)
{
/* Set up the default horizontal display enable skew */
pMode->Flags |= V_HSKEW;
/*
* Fill in mode-specific VGA Wonder data.
*/
pATIHW->b0 = 0x20U;
if (pATI->VideoRAM > 512)
pATIHW->b0 |= 0x08U;
else if (pATI->VideoRAM > 256)
pATIHW->b0 |= 0x10U;
pATIHW->b1 = ATIGetExtReg(0xB1U) & 0x04U;
/* This bit, when on, blanks out the overscan. */
pATIHW->b5 = 0x01U;
pATIHW->b8 = ATIGetExtReg(0xB8U) & 0xC0U;
pATIHW->b9 = ATIGetExtReg(0xB9U) & 0x7FU;
pATIHW->bd = ATIGetExtReg(0xBDU) & 0x02U;
pATIHW->b2 = 0x00U;
pATIHW->be = (ATIGetExtReg(0xBEU) & 0x30U) | 0x09U;
pATIHW->a6 = (ATIGetExtReg(0xA6U) & 0x38U) | 0x04U;
pATIHW->a7 = (ATIGetExtReg(0xA7U) & 0xBEU) ;
pATIHW->ac = (ATIGetExtReg(0xACU) & 0x8EU) ;
if (pMode->Flags & V_INTERLACE)
pATIHW->be |= 0x02U; /* Enable interlace */
#if 0 /* This is no longer needed but is left in for reference */
if (pMode->Flags & V_DBLSCAN) /* Enable doublescan */
pATIHW->b1 |= 0x08U;
#endif
if (pATI->OptionCSync || (pMode->Flags & (V_CSYNC | V_PCSYNC)))
pATIHW->bd |= 0x08U; /* Enable composite sync */
if (pMode->Flags & V_NCSYNC)
pATIHW->bd |= 0x09U; /* Invert composite sync */
if (pMode->HSkew > 0)
{
if (pMode->HSkew <= 3)
pATIHW->b5 |= 0x04U;
else
switch ((pMode->HSkew + 4) >> 3)
{
case 1: /* Use ATI override */
pATIHW->crt[3] &= ~0x60U;
pATIHW->b0 |= 0x01U;
break;
case 2: /* Use ATI override */
pATIHW->crt[3] &= ~0x60U;
pATIHW->a6 |= 0x01U;
break;
case 3:
pATIHW->crt[3] |= 0x60U;
break;
case 4:
pATIHW->a7 |= 0x40U;
break;
case 5:
pATIHW->ac |= 0x10U;
break;
case 6:
pATIHW->ac |= 0x20U;
break;
default:
break;
}
}
}
/*
* ATIVGAWonderSet --
*
* This function loads the VGA Wonder portion of a video state.
*/
void
ATIVGAWonderSet
(
ATIPtr pATI,
ATIHWPtr pATIHW
)
{
ATIModifyExtReg(pATI, 0xBEU, -1, 0x00U, pATIHW->be);
ATIModifyExtReg(pATI, 0xBFU, -1, 0x00U, pATIHW->bf);
ATIModifyExtReg(pATI, 0xA3U, -1, 0x00U, pATIHW->a3);
ATIModifyExtReg(pATI, 0xA6U, -1, 0x00U, pATIHW->a6);
ATIModifyExtReg(pATI, 0xA7U, -1, 0x00U, pATIHW->a7);
ATIModifyExtReg(pATI, 0xABU, -1, 0x00U, pATIHW->ab);
ATIModifyExtReg(pATI, 0xACU, -1, 0x00U, pATIHW->ac);
ATIModifyExtReg(pATI, 0xADU, -1, 0x00U, pATIHW->ad);
ATIModifyExtReg(pATI, 0xAEU, -1, 0x00U, pATIHW->ae);
ATIModifyExtReg(pATI, 0xB0U, -1, 0x00U, pATIHW->b0);
ATIModifyExtReg(pATI, 0xB1U, -1, 0x00U, pATIHW->b1);
ATIModifyExtReg(pATI, 0xB3U, -1, 0x00U, pATIHW->b3);
ATIModifyExtReg(pATI, 0xB5U, -1, 0x00U, pATIHW->b5);
ATIModifyExtReg(pATI, 0xB6U, -1, 0x00U, pATIHW->b6);
ATIModifyExtReg(pATI, 0xB8U, -1, 0x00U, pATIHW->b8);
ATIModifyExtReg(pATI, 0xB9U, -1, 0x00U, pATIHW->b9);
ATIModifyExtReg(pATI, 0xBAU, -1, 0x00U, pATIHW->ba);
ATIModifyExtReg(pATI, 0xBDU, -1, 0x00U, pATIHW->bd);
}
#endif /* AVOID_CPIO */
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