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