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/*

 * ohare.h: definitions for using the "O'Hare" I/O controller chip.

 *

 * Copyright (C) 1997 Paul Mackerras.

 *

 * BenH: Changed to match those of heathrow (but not all of them). Please

 *       check if I didn't break anything (especially the media bay).

 */

/* offset from ohare base for feature control register */

#define OHARE_MBCR      0x34

#define OHARE_FCR       0x38

/*

 * Bits in feature control register.

 * These were mostly derived by experiment on a powerbook 3400

 * and may differ for other machines.

 */

#define OH_SCC_RESET            1

#define OH_BAY_POWER_N          2       /* a guess */

#define OH_BAY_PCI_ENABLE       4       /* a guess */

#define OH_BAY_IDE_ENABLE       8

#define OH_BAY_FLOPPY_ENABLE    0x10

#define OH_IDE0_ENABLE          0x20

#define OH_IDE0_RESET_N         0x40    /* a guess */

#define OH_BAY_DEV_MASK         0x1c

#define OH_BAY_RESET_N          0x80

#define OH_IOBUS_ENABLE         0x100   /* IOBUS seems to be IDE */

#define OH_SCC_ENABLE           0x200

#define OH_MESH_ENABLE          0x400

#define OH_FLOPPY_ENABLE        0x800

#define OH_SCCA_IO              0x4000

#define OH_SCCB_IO              0x8000

#define OH_VIA_ENABLE           0x10000 /* Is apparently wrong, to be verified */

#define OH_IDE1_RESET_N         0x800000

/*

 * Bits to set in the feature control register on PowerBooks.

 */

#define PBOOK_FEATURES          (OH_IDE_ENABLE | OH_SCC_ENABLE | \

                                 OH_MESH_ENABLE | OH_SCCA_IO | OH_SCCB_IO)

/*

 * A magic value to put into the feature control register of the

 * "ohare" I/O controller on Starmaxes to enable the IDE CD interface.

 * Contributed by Harry Eaton.

 */

#define STARMAX_FEATURES        0xbeff7a