i386/linux/linux-2.3.21/include/asm-ppc/ohare.h

   1 /*
   2  * ohare.h: definitions for using the "O'Hare" I/O controller chip.
   3  *
   4  * Copyright (C) 1997 Paul Mackerras.
   5  */
   6
   7 /* offset from ohare base for feature control register */
   8 #define OHARE_FEATURE_REG       0x38
   9
  10 /*
  11  * Bits in feature control register.
  12  * These were mostly derived by experiment on a powerbook 3400
  13  * and may differ for other machines.
  14  */
  15 #define OH_SCC_RESET            1
  16 #define OH_BAY_RESET            2       /* a guess */
  17 #define OH_BAY_PCI_ENABLE       4       /* a guess */
  18 #define OH_BAY_IDE_ENABLE       8
  19 #define OH_BAY_FLOPPY_ENABLE    0x10
  20 #define OH_IDE_ENABLE           0x20
  21 #define OH_IDE_POWER            0x40    /* a guess */
  22 #define OH_BAY_ENABLE           0x80
  23 #define OH_IDE_RESET            0x100   /* 0-based, a guess */
  24 #define OH_SCC_ENABLE           0x200
  25 #define OH_MESH_ENABLE          0x400
  26 #define OH_FLOPPY_ENABLE        0x800
  27 #define OH_SCCA_IO              0x4000
  28 #define OH_SCCB_IO              0x8000
  29 #define OH_VIA_ENABLE           0x10000
  30 #define OH_IDECD_POWER          0x800000
  31
  32 /*
  33  * Bits to set in the feature control register on PowerBooks.
  34  */
  35 #define PBOOK_FEATURES          (OH_IDE_ENABLE | OH_SCC_ENABLE | \
  36                                  OH_MESH_ENABLE | OH_SCCA_IO | OH_SCCB_IO)
  37
  38 /*
  39  * A magic value to put into the feature control register of the
  40  * "ohare" I/O controller on Starmaxes to enable the IDE CD interface.
  41  * Contributed by Harry Eaton.
  42  */
  43 #define STARMAX_FEATURES        0xbeff7a