libdha/libdha.c

   1 /*
   2     libgha.c - Library for direct hardware access
   3     Copyrights:
   4     1996/10/27  - Robin Cutshaw (robin@xfree86.org)
   5                   XFree86 3.3.3 implementation
   6     1999        - Øyvind Aabling.
   7                   Modified for GATOS/win/gfxdump.
   8
   9     2002        - library implementation by Nick Kurshev
  10                 - dhahelper and some changes by Alex Beregszaszi
  11
  12     supported O/S's:    SVR4, UnixWare, SCO, Solaris,
  13                         FreeBSD, NetBSD, 386BSD, BSDI BSD/386,
  14                         Linux, Mach/386, ISC
  15                         DOS (WATCOM 9.5 compiler), Win9x (with mapdev.vxd)
  16     Licence: GPL
  17     Original location: www.linuxvideo.org/gatos
  18 */
  19
  20 #include "config.h"
  21
  22 #include "libdha.h"
  23 #include "AsmMacros.h"
  24 #include <stdio.h>
  25 #include <stdlib.h>
  26 #include <string.h>
  27 #include <fcntl.h>
  28 #include <sys/stat.h>
  29 #include <sys/types.h>
  30 #ifdef ARCH_ALPHA
  31 #include <sys/io.h>
  32 #endif
  33 #include <unistd.h>
  34
  35 #if defined(_WIN32)
  36 #include "sysdep/libdha_win32.c"
  37 #elif defined (__EMX__)
  38 #include "sysdep/libdha_os2.c"
  39 #else
  40
  41 #if defined(SVR4) || defined(SCO325)
  42 #  if !(defined(sun) && defined (i386) && defined (SVR4))
  43 #    define DEV_MEM "/dev/pmem"
  44 #  elif defined(PowerMAX_OS)
  45 #    define DEV_MEM "/dev/iomem"
  46 #  endif
  47 #  ifdef SCO325
  48 #   undef DEV_MEM
  49 #   define DEV_MEM "/dev/mem"
  50 #  endif
  51 # endif /* SVR4 */
  52
  53 /* Generic version */
  54 #include <sys/mman.h>
  55
  56 #ifndef DEV_MEM
  57 #define DEV_MEM "/dev/mem"
  58 #endif
  59
  60 #ifdef CONFIG_DHAHELPER
  61 #include "kernelhelper/dhahelper.h"
  62 #endif
  63
  64 #ifdef CONFIG_SVGAHELPER
  65 #include <svgalib_helper.h>
  66 #endif
  67
  68 static int mem_fd = -1;
  69
  70 void *map_phys_mem(unsigned long base, unsigned long size)
  71 {
  72 #ifdef ARCH_ALPHA
  73 /* TODO: move it into sysdep */
  74   base += bus_base();
  75 #endif
  76
  77 #ifdef CONFIG_SVGAHELPER
  78   if ( (mem_fd = open(DEV_SVGA,O_RDWR)) == -1) {
  79       perror("libdha: SVGAlib kernelhelper failed");
  80 #ifdef CONFIG_DHAHELPER
  81       goto dha_helper_way;
  82 #else
  83       goto dev_mem_way;
  84 #endif
  85   }
  86   else
  87       goto mmap;
  88 #endif
  89
  90 #ifdef CONFIG_DHAHELPER
  91 #ifdef CONFIG_SVGAHELPER
  92 dha_helper_way:
  93 #endif
  94   if ( (mem_fd = open("/dev/dhahelper",O_RDWR)) < 0)
  95   {
  96       perror("libdha: DHA kernelhelper failed");
  97       goto dev_mem_way;
  98   }
  99   else
 100   {
 101     dhahelper_memory_t mem_req;
 102
 103     mem_req.operation = MEMORY_OP_MAP;
 104     mem_req.start = base;
 105     mem_req.offset = 0;
 106     mem_req.size = size;
 107
 108     if (ioctl(mem_fd, DHAHELPER_MEMORY, &mem_req) < 0)
 109     {
 110         perror("libdha: DHA kernelhelper failed");
 111         close(mem_fd);
 112         goto dev_mem_way;
 113     }
 114     else
 115         goto mmap;
 116   }
 117 #endif
 118
 119 dev_mem_way:
 120   if ( (mem_fd = open(DEV_MEM,O_RDWR)) == -1)
 121   {
 122     perror("libdha: opening /dev/mem failed");
 123     return MAP_FAILED;
 124   }
 125
 126 mmap:
 127   return mmap(0,size,PROT_READ|PROT_WRITE,MAP_SHARED,mem_fd,base);
 128 }
 129
 130 void unmap_phys_mem(void *ptr, unsigned long size)
 131 {
 132   int res = munmap(ptr,size);
 133
 134   if (res == (int)MAP_FAILED)
 135   {
 136       perror("libdha: unmapping memory failed");
 137       return;
 138   }
 139
 140   close(mem_fd);
 141   mem_fd = -1;
 142
 143   return;
 144 }
 145
 146 #endif /* Generic mmap (not win32, nor os2) */
 147
 148 unsigned char INPORT8(unsigned idx)
 149 {
 150   return inb(idx);
 151 }
 152
 153 unsigned short INPORT16(unsigned idx)
 154 {
 155   return inw(idx);
 156 }
 157
 158 unsigned INPORT32(unsigned idx)
 159 {
 160   return inl(idx);
 161 }
 162
 163 void OUTPORT8(unsigned idx,unsigned char val)
 164 {
 165   outb(idx,val);
 166 }
 167
 168 void OUTPORT16(unsigned idx,unsigned short val)
 169 {
 170   outw(idx,val);
 171 }
 172
 173 void OUTPORT32(unsigned idx,unsigned val)
 174 {
 175   outl(idx,val);
 176 }