linux/arch/powerpc/include/asm/ohare.h
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   1#ifndef _ASM_POWERPC_OHARE_H
   2#define _ASM_POWERPC_OHARE_H
   3#ifdef __KERNEL__
   4/*
   5 * ohare.h: definitions for using the "O'Hare" I/O controller chip.
   6 *
   7 * Copyright (C) 1997 Paul Mackerras.
   8 *
   9 * BenH: Changed to match those of heathrow (but not all of them). Please
  10 *       check if I didn't break anything (especially the media bay).
  11 */
  12
  13/* offset from ohare base for feature control register */
  14#define OHARE_MBCR      0x34
  15#define OHARE_FCR       0x38
  16
  17/*
  18 * Bits in feature control register.
  19 * These were mostly derived by experiment on a powerbook 3400
  20 * and may differ for other machines.
  21 */
  22#define OH_SCC_RESET            1
  23#define OH_BAY_POWER_N          2       /* a guess */
  24#define OH_BAY_PCI_ENABLE       4       /* a guess */
  25#define OH_BAY_IDE_ENABLE       8
  26#define OH_BAY_FLOPPY_ENABLE    0x10
  27#define OH_IDE0_ENABLE          0x20
  28#define OH_IDE0_RESET_N         0x40    /* a guess */
  29#define OH_BAY_DEV_MASK         0x1c
  30#define OH_BAY_RESET_N          0x80
  31#define OH_IOBUS_ENABLE         0x100   /* IOBUS seems to be IDE */
  32#define OH_SCC_ENABLE           0x200
  33#define OH_MESH_ENABLE          0x400
  34#define OH_FLOPPY_ENABLE        0x800
  35#define OH_SCCA_IO              0x4000
  36#define OH_SCCB_IO              0x8000
  37#define OH_VIA_ENABLE           0x10000 /* Is apparently wrong, to be verified */
  38#define OH_IDE1_RESET_N         0x800000
  39
  40/*
  41 * Bits to set in the feature control register on PowerBooks.
  42 */
  43#define PBOOK_FEATURES          (OH_IDE_ENABLE | OH_SCC_ENABLE | \
  44                                 OH_MESH_ENABLE | OH_SCCA_IO | OH_SCCB_IO)
  45
  46/*
  47 * A magic value to put into the feature control register of the
  48 * "ohare" I/O controller on Starmaxes to enable the IDE CD interface.
  49 * Contributed by Harry Eaton.
  50 */
  51#define STARMAX_FEATURES        0xbeff7a
  52
  53#endif /* __KERNEL__ */
  54#endif /* _ASM_POWERPC_OHARE_H */
  55