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