arch/powerpc/include/asm/ohare.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef _ASM_POWERPC_OHARE_H
   3 #define _ASM_POWERPC_OHARE_H
   4 #ifdef __KERNEL__
   5 /*
   6  * ohare.h: definitions for using the "O'Hare" I/O controller chip.
   7  *
   8  * Copyright (C) 1997 Paul Mackerras.
   9  *
  10  * BenH: Changed to match those of heathrow (but not all of them). Please
  11  *       check if I didn't break anything (especially the media bay).
  12  */
  13
  14 /* offset from ohare base for feature control register */
  15 #define OHARE_MBCR      0x34
  16 #define OHARE_FCR       0x38
  17
  18 /*
  19  * Bits in feature control register.
  20  * These were mostly derived by experiment on a powerbook 3400
  21  * and may differ for other machines.
  22  */
  23 #define OH_SCC_RESET            1
  24 #define OH_BAY_POWER_N          2       /* a guess */
  25 #define OH_BAY_PCI_ENABLE       4       /* a guess */
  26 #define OH_BAY_IDE_ENABLE       8
  27 #define OH_BAY_FLOPPY_ENABLE    0x10
  28 #define OH_IDE0_ENABLE          0x20
  29 #define OH_IDE0_RESET_N         0x40    /* a guess */
  30 #define OH_BAY_DEV_MASK         0x1c
  31 #define OH_BAY_RESET_N          0x80
  32 #define OH_IOBUS_ENABLE         0x100   /* IOBUS seems to be IDE */
  33 #define OH_SCC_ENABLE           0x200
  34 #define OH_MESH_ENABLE          0x400
  35 #define OH_FLOPPY_ENABLE        0x800
  36 #define OH_SCCA_IO              0x4000
  37 #define OH_SCCB_IO              0x8000
  38 #define OH_VIA_ENABLE           0x10000 /* Is apparently wrong, to be verified */
  39 #define OH_IDE1_RESET_N         0x800000
  40
  41 /*
  42  * Bits to set in the feature control register on PowerBooks.
  43  */
  44 #define PBOOK_FEATURES          (OH_IDE_ENABLE | OH_SCC_ENABLE | \
  45                                  OH_MESH_ENABLE | OH_SCCA_IO | OH_SCCB_IO)
  46
  47 /*
  48  * A magic value to put into the feature control register of the
  49  * "ohare" I/O controller on Starmaxes to enable the IDE CD interface.
  50  * Contributed by Harry Eaton.
  51  */
  52 #define STARMAX_FEATURES        0xbeff7a
  53
  54 #endif /* __KERNEL__ */
  55 #endif /* _ASM_POWERPC_OHARE_H */