Current File : //usr/src/linux-headers-5.15.0-43/arch/powerpc/include/asm/ohare.h
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _ASM_POWERPC_OHARE_H
#define _ASM_POWERPC_OHARE_H
#ifdef __KERNEL__
/*
* 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
#endif /* __KERNEL__ */
#endif /* _ASM_POWERPC_OHARE_H */
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