Commit | Line | Data |
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1da177e4 LT |
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 |