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      1 /*
      2  * Copyright 1997 through 2004 by Marc Aurele La France (TSI @ UQV), tsi (at) xfree86.org
      3  *
      4  * Permission to use, copy, modify, distribute, and sell this software and its
      5  * documentation for any purpose is hereby granted without fee, provided that
      6  * the above copyright notice appear in all copies and that both that copyright
      7  * notice and this permission notice appear in supporting documentation, and
      8  * that the name of Marc Aurele La France not be used in advertising or
      9  * publicity pertaining to distribution of the software without specific,
     10  * written prior permission.  Marc Aurele La France makes no representations
     11  * about the suitability of this software for any purpose.  It is provided
     12  * "as-is" without express or implied warranty.
     13  *
     14  * MARC AURELE LA FRANCE DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
     15  * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS.  IN NO
     16  * EVENT SHALL MARC AURELE LA FRANCE BE LIABLE FOR ANY SPECIAL, INDIRECT OR
     17  * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
     18  * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
     19  * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
     20  * PERFORMANCE OF THIS SOFTWARE.
     21  */
     22 
     23 #ifdef HAVE_CONFIG_H
     24 #include "config.h"
     25 #endif
     26 
     27 #include "ati.h"
     28 #include "atibank.h"
     29 #include "atimach64io.h"
     30 #include "atiwonderio.h"
     31 
     32 #ifndef AVOID_CPIO
     33 
     34 /*
     35  * ATIx8800SetBank --
     36  *
     37  * Set an ATI 28800's, 68800's or 88800's read and write bank numbers.
     38  */
     39 void
     40 ATIx8800SetBank
     41 (
     42     ATIPtr       pATI,
     43     unsigned int iBank
     44 )
     45 {
     46     (void)iBank; /* always called with iBank = 0 */
     47 
     48     ATIPutExtReg(0xB2U, 0x00U);
     49     ATIModifyExtReg(pATI, 0xAEU, -1, (CARD8)(~0x0FU), 0x00U);
     50 }
     51 
     52 /*
     53  * Functions to simulate a banked VGA aperture using a Mach64's small dual
     54  * paged apertures.  There are two sets of these:  one for packed modes, the
     55  * other for planar modes.
     56  */
     57 
     58 static CARD32
     59 ATIMach64MassagePackedBankNumber
     60 (
     61     CARD8 iBank
     62 )
     63 {
     64     iBank <<= 1;
     65     return ((iBank + 1) << 16) | iBank;
     66 }
     67 
     68 /*
     69  * ATIMach64SetBankPacked --
     70  *
     71  * Set read and write bank numbers for small dual paged apertures.
     72  */
     73 void
     74 ATIMach64SetBankPacked
     75 (
     76     ATIPtr       pATI,
     77     unsigned int iBank
     78 )
     79 {
     80     CARD32 tmp = ATIMach64MassagePackedBankNumber(iBank);
     81 
     82     outr(MEM_VGA_RP_SEL, tmp);
     83     outr(MEM_VGA_WP_SEL, tmp);
     84 }
     85 
     86 static CARD32
     87 ATIMach64MassagePlanarBankNumber
     88 (
     89     CARD8 iBank
     90 )
     91 {
     92     iBank <<= 3;
     93     return ((iBank + 4) << 16) | iBank;
     94 }
     95 
     96 /*
     97  * ATIMach64SetBankPlanar --
     98  *
     99  * Set read and write bank numbers for small dual paged apertures.
    100  */
    101 void
    102 ATIMach64SetBankPlanar
    103 (
    104     ATIPtr       pATI,
    105     unsigned int iBank
    106 )
    107 {
    108     CARD32 tmp = ATIMach64MassagePlanarBankNumber(iBank);
    109 
    110     outr(MEM_VGA_RP_SEL, tmp);
    111     outr(MEM_VGA_WP_SEL, tmp);
    112 }
    113 
    114 #endif /* AVOID_CPIO */
    115