reactos/hal/halx86/xbox/pci_xbox.c

   1 /* $Id$
   2  *
   3  * COPYRIGHT:     See COPYING in the top level directory
   4  * PROJECT:       ReactOS kernel
   5  * FILE:          hal/halx86/xbox/pci_xbox.c
   6  * PURPOSE:       Xbox specific handling of PCI cards
   7  * PROGRAMMER:    Ge van Geldorp (gvg@reactos.com)
   8  * UPDATE HISTORY:
   9  *             2004/12/04: Created
  10  *
  11  * Trying to get PCI config data from devices 0:0:1 and 0:0:2 will completely
  12  * hang the Xbox. Also, the device number doesn't seem to be decoded for the
  13  * video card, so it appears to be present on 1:0:0 - 1:31:0.
  14  * We hack around these problems by indicating "device not present" for devices
  15  * 0:0:1, 0:0:2, 1:1:0, 1:2:0, 1:3:0, ...., 1:31:0
  16  */
  17
  18 /* INCLUDES *****************************************************************/
  19
  20 #include <ddk/ntddk.h>
  21 #include <hal.h>
  22 #include <bus.h>
  23 #include "halxbox.h"
  24
  25 #define NDEBUG
  26 #include <internal/debug.h>
  27
  28 /* VARIABLES ***************************************************************/
  29
  30 static ULONG (STDCALL *GenericGetPciData)(PBUS_HANDLER BusHandler,
  31                                           ULONG BusNumber,
  32                                           ULONG SlotNumber,
  33                                           PVOID Buffer,
  34                                           ULONG Offset,
  35                                           ULONG Length);
  36 static ULONG (STDCALL *GenericSetPciData)(PBUS_HANDLER BusHandler,
  37                                           ULONG BusNumber,
  38                                           ULONG SlotNumber,
  39                                           PVOID Buffer,
  40                                           ULONG Offset,
  41                                           ULONG Length);
  42
  43 /* FUNCTIONS ***************************************************************/
  44
  45 static ULONG STDCALL
  46 HalpXboxGetPciData(PBUS_HANDLER BusHandler,
  47                    ULONG BusNumber,
  48                    ULONG SlotNumber,
  49                    PVOID Buffer,
  50                    ULONG Offset,
  51                    ULONG Length)
  52 {
  53   DPRINT("HalpXboxGetPciData() called.\n");
  54   DPRINT("  BusNumber %lu\n", BusNumber);
  55   DPRINT("  SlotNumber %lu\n", SlotNumber);
  56   DPRINT("  Offset 0x%lx\n", Offset);
  57   DPRINT("  Length 0x%lx\n", Length);
  58
  59   if ((0 == BusNumber && 0 == (SlotNumber & 0x1f) &&
  60        (1 == ((SlotNumber >> 5) & 0x07) || 2 == ((SlotNumber >> 5) & 0x07))) ||
  61       (1 == BusNumber && 0 != (SlotNumber & 0x1f)))
  62     {
  63       DPRINT("Blacklisted PCI slot\n");
  64       if (0 == Offset && 2 <= Length)
  65         {
  66           *(PUSHORT)Buffer = PCI_INVALID_VENDORID;
  67           return 2;
  68         }
  69       return 0;
  70     }
  71
  72   return GenericGetPciData(BusHandler, BusNumber, SlotNumber, Buffer, Offset, Length);
  73 }
  74
  75 static ULONG STDCALL
  76 HalpXboxSetPciData(PBUS_HANDLER BusHandler,
  77                    ULONG BusNumber,
  78                    ULONG SlotNumber,
  79                    PVOID Buffer,
  80                    ULONG Offset,
  81                    ULONG Length)
  82 {
  83   DPRINT("HalpXboxSetPciData() called.\n");
  84   DPRINT("  BusNumber %lu\n", BusNumber);
  85   DPRINT("  SlotNumber %lu\n", SlotNumber);
  86   DPRINT("  Offset 0x%lx\n", Offset);
  87   DPRINT("  Length 0x%lx\n", Length);
  88
  89   if ((0 == BusNumber && 0 == (SlotNumber & 0x1f) &&
  90        (1 == ((SlotNumber >> 5) & 0x07) || 2 == ((SlotNumber >> 5) & 0x07))) ||
  91       (1 == BusNumber && 0 != (SlotNumber & 0x1f)))
  92     {
  93       DPRINT1("Trying to set data on blacklisted PCI slot\n");
  94       return 0;
  95     }
  96
  97   return GenericSetPciData(BusHandler, BusNumber, SlotNumber, Buffer, Offset, Length);
  98 }
  99
 100 void
 101 HalpXboxInitPciBus(ULONG BusNumber, PBUS_HANDLER BusHandler)
 102 {
 103   if (0 == BusNumber || 1 == BusNumber)
 104     {
 105       GenericGetPciData = BusHandler->GetBusData;
 106       BusHandler->GetBusData = HalpXboxGetPciData;
 107       GenericSetPciData = BusHandler->SetBusData;
 108       BusHandler->SetBusData = HalpXboxSetPciData;
 109     }
 110 }
 111
 112 /* EOF */