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 */ 56