arch/powerpc/include/asm/ohare.h

   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 */