| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 |