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  * BenH: Changed to match those of heathrow (but not all of them). Please
   7  *       check if I didn't break anything (especially the media bay).
   8  */
   9
  10 /* offset from ohare base for feature control register */
  11 #define OHARE_FEATURE_REG       0x38
  12
  13 /*
  14  * Bits in feature control register.
  15  * These were mostly derived by experiment on a powerbook 3400
  16  * and may differ for other machines.
  17  */
  18 #define OH_SCC_RESET            1
  19 #define OH_BAY_POWER_N          2       /* a guess */
  20 #define OH_BAY_PCI_ENABLE       4       /* a guess */
  21 #define OH_BAY_IDE_ENABLE       8
  22 #define OH_BAY_FLOPPY_ENABLE    0x10
  23 #define OH_IDE0_ENABLE          0x20
  24 #define OH_IDE0_RESET_N         0x40    /* a guess */
  25 #define OH_BAY_RESET_N          0x80
  26 #define OH_IOBUS_ENABLE         0x100   /* IOBUS seems to be IDE */
  27 #define OH_SCC_ENABLE           0x200
  28 #define OH_MESH_ENABLE          0x400
  29 #define OH_FLOPPY_ENABLE        0x800
  30 #define OH_SCCA_IO              0x4000
  31 #define OH_SCCB_IO              0x8000
  32 #define OH_VIA_ENABLE           0x10000 /* Is apparently wrong, to be verified */
  33 #define OH_IDE1_RESET_N         0x800000
  34
  35 /*
  36  * Bits to set in the feature control register on PowerBooks.
  37  */
  38 #define PBOOK_FEATURES          (OH_IDE_ENABLE | OH_SCC_ENABLE | \
  39                                  OH_MESH_ENABLE | OH_SCCA_IO | OH_SCCB_IO)
  40
  41 /*
  42  * A magic value to put into the feature control register of the
  43  * "ohare" I/O controller on Starmaxes to enable the IDE CD interface.
  44  * Contributed by Harry Eaton.
  45  */
  46 #define STARMAX_FEATURES        0xbeff7a