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 #define NDEBUG
  21
  22 #include <ddk/ntddk.h>
  23 #include <hal.h>
  24 #include <bus.h>
  25 #include "halxbox.h"
  26
  27 #include <internal/debug.h>
  28 #include <debug.h>
  29
  30 /* VARIABLES ***************************************************************/
  31
  32 static ULONG (STDCALL *GenericGetPciData)(PBUS_HANDLER BusHandler,
  33                                           ULONG BusNumber,
  34                                           ULONG SlotNumber,
  35                                           PVOID Buffer,
  36                                           ULONG Offset,
  37                                           ULONG Length);
  38 static ULONG (STDCALL *GenericSetPciData)(PBUS_HANDLER BusHandler,
  39                                           ULONG BusNumber,
  40                                           ULONG SlotNumber,
  41                                           PVOID Buffer,
  42                                           ULONG Offset,
  43                                           ULONG Length);
  44
  45 /* FUNCTIONS ***************************************************************/
  46
  47 static ULONG STDCALL
  48 HalpXboxGetPciData(PBUS_HANDLER BusHandler,
  49                    ULONG BusNumber,
  50                    ULONG SlotNumber,
  51                    PVOID Buffer,
  52                    ULONG Offset,
  53                    ULONG Length)
  54 {
  55   DPRINT("HalpXboxGetPciData() called.\n");
  56   DPRINT("  BusNumber %lu\n", BusNumber);
  57   DPRINT("  SlotNumber %lu\n", SlotNumber);
  58   DPRINT("  Offset 0x%lx\n", Offset);
  59   DPRINT("  Length 0x%lx\n", Length);
  60
  61   if ((0 == BusNumber && 0 == (SlotNumber & 0x1f) &&
  62        (1 == ((SlotNumber >> 5) & 0x07) || 2 == ((SlotNumber >> 5) & 0x07))) ||
  63       (1 == BusNumber && 0 != (SlotNumber & 0x1f)))
  64     {
  65       DPRINT("Blacklisted PCI slot\n");
  66       if (0 == Offset && 2 <= Length)
  67         {
  68           *(PUSHORT)Buffer = PCI_INVALID_VENDORID;
  69           return 2;
  70         }
  71       return 0;
  72     }
  73
  74   return GenericGetPciData(BusHandler, BusNumber, SlotNumber, Buffer, Offset, Length);
  75 }
  76
  77 static ULONG STDCALL
  78 HalpXboxSetPciData(PBUS_HANDLER BusHandler,
  79                    ULONG BusNumber,
  80                    ULONG SlotNumber,
  81                    PVOID Buffer,
  82                    ULONG Offset,
  83                    ULONG Length)
  84 {
  85   DPRINT("HalpXboxSetPciData() called.\n");
  86   DPRINT("  BusNumber %lu\n", BusNumber);
  87   DPRINT("  SlotNumber %lu\n", SlotNumber);
  88   DPRINT("  Offset 0x%lx\n", Offset);
  89   DPRINT("  Length 0x%lx\n", Length);
  90
  91   if ((0 == BusNumber && 0 == (SlotNumber & 0x1f) &&
  92        (1 == ((SlotNumber >> 5) & 0x07) || 2 == ((SlotNumber >> 5) & 0x07))) ||
  93       (1 == BusNumber && 0 != (SlotNumber & 0x1f)))
  94     {
  95       DPRINT1("Trying to set data on blacklisted PCI slot\n");
  96       return 0;
  97     }
  98
  99   return GenericSetPciData(BusHandler, BusNumber, SlotNumber, Buffer, Offset, Length);
 100 }
 101
 102 void
 103 HalpXboxInitPciBus(ULONG BusNumber, PBUS_HANDLER BusHandler)
 104 {
 105   if (0 == BusNumber || 1 == BusNumber)
 106     {
 107       GenericGetPciData = BusHandler->GetBusData;
 108       BusHandler->GetBusData = HalpXboxGetPciData;
 109       GenericSetPciData = BusHandler->SetBusData;
 110       BusHandler->SetBusData = HalpXboxSetPciData;
 111     }
 112 }
 113
 114 /* EOF */