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+/* $XFree86: xc/programs/Xserver/hw/xfree86/drivers/ati/atibank.c,v 1.12 2003/01/01 19:16:30 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 "atibank.h"
+#include "atimach64io.h"
+#include "atiwonderio.h"
+
+#ifndef AVOID_CPIO
+
+/*
+ * ATI VGA Wonder V3 adapters use an ATI 18800 chip and are single-banked.
+ * Bank selection is done with bits 0x1E of ATI extended VGA register index
+ * 0xB2.
+ */
+
+/*
+ * ATIV3SetBank --
+ *
+ * Set an ATI 18800's bank number.
+ */
+void
+ATIV3SetBank
+(
+    ATIPtr       pATI,
+    unsigned int iBank
+)
+{
+    ATIModifyExtReg(pATI, 0xB2U, -1, (CARD8)(~0x1EU), SetBits(iBank, 0x1EU));
+}
+
+/*
+ * ATIV3SetReadWrite --
+ *
+ * Set an ATI 18800's bank number.
+ */
+int
+ATIV3SetReadWrite
+(
+    ScreenPtr    pScreen,
+    unsigned int iBank
+)
+{
+    ATIPtr pATI = ATIPTR(XF86SCRNINFO(pScreen));
+
+    ATIModifyExtReg(pATI, 0xB2U, -1, (CARD8)(~0x1EU), SetBits(iBank, 0x1EU));
+    return 0;
+}
+
+/*
+ * ATI VGA Wonder V4 and V5 adapters use an ATI 18800-1 chip.  Bank selection
+ * is done with ATI extended VGA register index 0xB2.  The format is:
+ *
+ *   0xE0 - Read bank select bits 0x07
+ *   0x1E - Write bank select bits 0x0F
+ *   0x01 - Read bank select bit 0x08.
+ */
+
+/*
+ * ATIV4V5SetBank --
+ *
+ * Set an ATI 18800-1's read and write bank numbers.
+ */
+void
+ATIV4V5SetBank
+(
+    ATIPtr       pATI,
+    unsigned int iBank
+)
+{
+    pATI->B2Reg = SetBits(iBank, 0x1EU) | SetBits(iBank, 0xE0U) |
+        SetBits(GetBits(iBank, 0x08U), 0x01U);
+    ATIPutExtReg(0xB2U, pATI->B2Reg);
+}
+
+/*
+ * ATIV4V5SetRead --
+ *
+ * Set an ATI 18800-1's read bank number.
+ */
+int
+ATIV4V5SetRead
+(
+    ScreenPtr    pScreen,
+    unsigned int iBank
+)
+{
+    ATIPtr pATI  = ATIPTR(XF86SCRNINFO(pScreen));
+    CARD8  B2Reg = (pATI->B2Reg & 0x1EU) | SetBits(iBank, 0xE0U) |
+                   SetBits(GetBits(iBank, 0x08U), 0x01U);
+
+    if (B2Reg != pATI->B2Reg)
+    {
+        ATIPutExtReg(0xB2U, B2Reg);
+        pATI->B2Reg = B2Reg;
+    }
+
+    return 0;
+}
+
+/*
+ * ATIV4V5SetWrite --
+ *
+ * Set an ATI 18800-1's write bank number.
+ */
+int
+ATIV4V5SetWrite
+(
+    ScreenPtr    pScreen,
+    unsigned int iBank
+)
+{
+    ATIPtr pATI = ATIPTR(XF86SCRNINFO(pScreen));
+    CARD8  B2Reg = (pATI->B2Reg & 0xE1U) | SetBits(iBank, 0x1EU);
+
+    if (B2Reg != pATI->B2Reg)
+    {
+        ATIPutExtReg(0xB2U, B2Reg);
+        pATI->B2Reg = B2Reg;
+    }
+    return 0;
+}
+
+/*
+ * ATIV4V5SetReadWrite --
+ *
+ * Set an ATI 18800-1's read and write bank numbers.
+ */
+int
+ATIV4V5SetReadWrite
+(
+    ScreenPtr    pScreen,
+    unsigned int iBank
+)
+{
+    ATIV4V5SetBank(ATIPTR(XF86SCRNINFO(pScreen)), iBank);
+    return 0;
+}
+
+/*
+ * In addition to ATI extended register index 0xB2, 28800's, 68800's and
+ * 88800's define banking bits in bits 0x0F of ATI extended VGA register index
+ * 0xAE.  These are only needed for adapters with more than 1MB of video
+ * memory, and it is questionable whether or not they are actually implemented
+ * by 28800's and 88800's.  ATI extended VGA register index 0xAE is defined as
+ * follows:
+ *
+ *    0xF0 - reserved
+ *    0x0C - read bank select bits 0x30
+ *    0x03 - write bank select bits 0x30
+ */
+
+/*
+ * ATIx8800SetBank --
+ *
+ * Set an ATI 28800's, 68800's or 88800's read and write bank numbers.
+ */
+void
+ATIx8800SetBank
+(
+    ATIPtr       pATI,
+    unsigned int iBank
+)
+{
+    ATIV4V5SetBank(pATI, iBank);
+    iBank = GetBits(iBank, 0x30U);
+    ATIModifyExtReg(pATI, 0xAEU, -1, (CARD8)(~0x0FU),
+        SetBits(iBank, 0x03U) | SetBits(iBank, 0x0CU));
+}
+
+/*
+ * ATIx8800SetRead --
+ *
+ * Set an ATI 28800's, 68800's or 88800's read bank numbers.
+ */
+int
+ATIx8800SetRead
+(
+    ScreenPtr    pScreen,
+    unsigned int iBank
+)
+{
+    (void)ATIV4V5SetRead(pScreen, iBank);
+    ATIModifyExtReg(ATIPTR(XF86SCRNINFO(pScreen)), 0xAEU, -1, (CARD8)(~0x0CU),
+        SetBits(GetBits(iBank, 0x30U), 0x0CU));
+    return 0;
+}
+
+/*
+ * ATIx8800SetWrite --
+ *
+ * Set an ATI 28800's, 68800's or 88800's write bank numbers.
+ */
+int
+ATIx8800SetWrite
+(
+    ScreenPtr    pScreen,
+    unsigned int iBank
+)
+{
+    (void)ATIV4V5SetWrite(pScreen, iBank);
+    ATIModifyExtReg(ATIPTR(XF86SCRNINFO(pScreen)), 0xAEU, -1, (CARD8)(~0x03U),
+        SetBits(GetBits(iBank, 0x30U), 0x03U));
+    return 0;
+}
+
+/*
+ * ATIx8800SetReadWrite --
+ *
+ * Set an ATI 28800's, 68800's or 88800's read and write bank numbers.
+ */
+int
+ATIx8800SetReadWrite
+(
+    ScreenPtr    pScreen,
+    unsigned int iBank
+)
+{
+    ATIx8800SetBank(ATIPTR(XF86SCRNINFO(pScreen)), iBank);
+    return 0;
+}
+
+/*
+ * Functions to simulate a banked VGA aperture using a Mach64's small dual
+ * paged apertures.  There are two sets of these:  one for packed modes, the
+ * other for planar modes.
+ */
+
+static CARD32
+ATIMach64MassagePackedBankNumber
+(
+    CARD8 iBank
+)
+{
+    iBank <<= 1;
+    return ((iBank + 1) << 16) | iBank;
+}
+
+/*
+ * ATIMach64SetBankPacked --
+ *
+ * Set read and write bank numbers for small dual paged apertures.
+ */
+void
+ATIMach64SetBankPacked
+(
+    ATIPtr       pATI,
+    unsigned int iBank
+)
+{
+    CARD32 tmp = ATIMach64MassagePackedBankNumber(iBank);
+
+    outr(MEM_VGA_RP_SEL, tmp);
+    outr(MEM_VGA_WP_SEL, tmp);
+}
+
+/*
+ * ATIMach64SetReadPacked --
+ *
+ * Set read bank number for small dual paged apertures.
+ */
+int
+ATIMach64SetReadPacked
+(
+    ScreenPtr    pScreen,
+    unsigned int iBank
+)
+{
+    ATIPtr pATI = ATIPTR(XF86SCRNINFO(pScreen));
+
+    outr(MEM_VGA_RP_SEL, ATIMach64MassagePackedBankNumber(iBank));
+    return 0;
+}
+
+/*
+ * ATIMach64SetWritePacked --
+ *
+ * Set write bank number for small dual paged apertures.
+ */
+int
+ATIMach64SetWritePacked
+(
+    ScreenPtr    pScreen,
+    unsigned int iBank
+)
+{
+    ATIPtr pATI = ATIPTR(XF86SCRNINFO(pScreen));
+
+    outr(MEM_VGA_WP_SEL, ATIMach64MassagePackedBankNumber(iBank));
+    return 0;
+}
+
+/*
+ * ATIMach64SetReadWritePacked --
+ *
+ * Set read and write bank numbers for small dual paged apertures.
+ */
+int
+ATIMach64SetReadWritePacked
+(
+    ScreenPtr    pScreen,
+    unsigned int iBank
+)
+{
+    ATIMach64SetBankPacked(ATIPTR(XF86SCRNINFO(pScreen)), iBank);
+    return 0;
+}
+
+static CARD32
+ATIMach64MassagePlanarBankNumber
+(
+    CARD8 iBank
+)
+{
+    iBank <<= 3;
+    return ((iBank + 4) << 16) | iBank;
+}
+
+/*
+ * ATIMach64SetBankPlanar --
+ *
+ * Set read and write bank numbers for small dual paged apertures.
+ */
+void
+ATIMach64SetBankPlanar
+(
+    ATIPtr       pATI,
+    unsigned int iBank
+)
+{
+    CARD32 tmp = ATIMach64MassagePlanarBankNumber(iBank);
+
+    outr(MEM_VGA_RP_SEL, tmp);
+    outr(MEM_VGA_WP_SEL, tmp);
+}
+
+/*
+ * ATIMach64SetReadPlanar --
+ *
+ * Set read bank number for small dual paged apertures.
+ */
+int
+ATIMach64SetReadPlanar
+(
+    ScreenPtr    pScreen,
+    unsigned int iBank
+)
+{
+    ATIPtr pATI = ATIPTR(XF86SCRNINFO(pScreen));
+
+    outr(MEM_VGA_RP_SEL, ATIMach64MassagePlanarBankNumber(iBank));
+    return 0;
+}
+
+/*
+ * ATIMach64SetWritePlanar --
+ *
+ * Set write bank number for small dual paged apertures.
+ */
+int
+ATIMach64SetWritePlanar
+(
+    ScreenPtr    pScreen,
+    unsigned int iBank
+)
+{
+    ATIPtr pATI = ATIPTR(XF86SCRNINFO(pScreen));
+
+    outr(MEM_VGA_WP_SEL, ATIMach64MassagePlanarBankNumber(iBank));
+    return 0;
+}
+
+/*
+ * ATIMach64SetReadWritePlanar --
+ *
+ * Set read and write bank numbers for small dual paged apertures.
+ */
+int
+ATIMach64SetReadWritePlanar
+(
+    ScreenPtr    pScreen,
+    unsigned int iBank
+)
+{
+    ATIMach64SetBankPlanar(ATIPTR(XF86SCRNINFO(pScreen)), iBank);
+    return 0;
+}
+
+#endif /* AVOID_CPIO */