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      1 /*
      2  * Copyright 1992-2003 by Alan Hourihane, North Wales, UK.
      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
      7  * copyright notice and this permission notice appear in supporting
      8  * documentation, and that the name of Alan Hourihane not be used in
      9  * advertising or publicity pertaining to distribution of the software without
     10  * specific, written prior permission.  Alan Hourihane 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  * ALAN HOURIHANE DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
     15  * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
     16  * EVENT SHALL ALAN HOURIHANE 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  * Author:  Alan Hourihane, alanh (at) fairlite.demon.co.uk
     23  */
     24 
     25 #ifdef HAVE_CONFIG_H
     26 #include "config.h"
     27 #endif
     28 
     29 /* All drivers should typically include these */
     30 #include "xf86.h"
     31 #include "xf86_OSproc.h"
     32 
     33 /* Drivers that need to access the PCI config space directly need this */
     34 #include "xf86Pci.h"
     35 
     36 #include "compiler.h"
     37 #include "trident.h"
     38 #include "trident_regs.h"
     39 
     40 int TVGA8900SetRead(ScreenPtr pScreen, int bank)
     41 {
     42   ScrnInfoPtr pScrn;
     43   TRIDENTPtr pTrident;
     44   pScrn = xf86ScreenToScrn(pScreen);
     45   pTrident = TRIDENTPTR(pScrn);
     46   OUTW(0x3c4, 0xC000 | (((bank & 0x3f) ^ 0x02)<<8)|0x0E);
     47   return 0;
     48 }
     49 int TGUISetRead(ScreenPtr pScreen, int bank)
     50 {
     51   ScrnInfoPtr pScrn;
     52   TRIDENTPtr pTrident;
     53   pScrn = xf86ScreenToScrn(pScreen);
     54   pTrident = TRIDENTPTR(pScrn);
     55   OUTB(0x3d9, bank & 0xff);
     56   return 0;
     57 }
     58 int TVGA8900SetWrite(ScreenPtr pScreen, int bank)
     59 {
     60   ScrnInfoPtr pScrn;
     61   TRIDENTPtr pTrident;
     62   pScrn = xf86ScreenToScrn(pScreen);
     63   pTrident = TRIDENTPTR(pScrn);
     64   OUTW(0x3c4, 0xC000 | (((bank & 0x3f) ^ 0x02)<<8)|0x0E);
     65   return 0;
     66 }
     67 int TGUISetWrite(ScreenPtr pScreen, int bank)
     68 {
     69   ScrnInfoPtr pScrn;
     70   TRIDENTPtr pTrident;
     71   pScrn = xf86ScreenToScrn(pScreen);
     72   pTrident = TRIDENTPTR(pScrn);
     73   OUTB(0x3d8, bank & 0xff);
     74   return 0;
     75 }
     76 int TVGA8900SetReadWrite(ScreenPtr pScreen, int bank)
     77 {
     78   ScrnInfoPtr pScrn;
     79   TRIDENTPtr pTrident;
     80   pScrn = xf86ScreenToScrn(pScreen);
     81   pTrident = TRIDENTPTR(pScrn);
     82   OUTW(0x3c4, 0xC000 | (((bank & 0x3f) ^ 0x02)<<8)|0x0E);
     83   return 0;
     84 }
     85 int TGUISetReadWrite(ScreenPtr pScreen, int bank)
     86 {
     87   ScrnInfoPtr pScrn;
     88   TRIDENTPtr pTrident;
     89   pScrn = xf86ScreenToScrn(pScreen);
     90   pTrident = TRIDENTPTR(pScrn);
     91   OUTB(0x3d8, bank & 0xff);
     92   OUTB(0x3d9, bank & 0xff);
     93   return 0;
     94 }
     95