49 lines
1.5 KiB
C
49 lines
1.5 KiB
C
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/*
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* ohare.h: definitions for using the "O'Hare" I/O controller chip.
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*
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* Copyright (C) 1997 Paul Mackerras.
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*
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* BenH: Changed to match those of heathrow (but not all of them). Please
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* check if I didn't break anything (especially the media bay).
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*/
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/* offset from ohare base for feature control register */
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#define OHARE_MBCR 0x34
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#define OHARE_FCR 0x38
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/*
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* Bits in feature control register.
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* These were mostly derived by experiment on a powerbook 3400
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* and may differ for other machines.
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*/
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#define OH_SCC_RESET 1
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#define OH_BAY_POWER_N 2 /* a guess */
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#define OH_BAY_PCI_ENABLE 4 /* a guess */
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#define OH_BAY_IDE_ENABLE 8
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#define OH_BAY_FLOPPY_ENABLE 0x10
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#define OH_IDE0_ENABLE 0x20
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#define OH_IDE0_RESET_N 0x40 /* a guess */
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#define OH_BAY_DEV_MASK 0x1c
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#define OH_BAY_RESET_N 0x80
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#define OH_IOBUS_ENABLE 0x100 /* IOBUS seems to be IDE */
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#define OH_SCC_ENABLE 0x200
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#define OH_MESH_ENABLE 0x400
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#define OH_FLOPPY_ENABLE 0x800
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#define OH_SCCA_IO 0x4000
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#define OH_SCCB_IO 0x8000
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#define OH_VIA_ENABLE 0x10000 /* Is apparently wrong, to be verified */
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#define OH_IDE1_RESET_N 0x800000
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/*
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* Bits to set in the feature control register on PowerBooks.
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*/
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#define PBOOK_FEATURES (OH_IDE_ENABLE | OH_SCC_ENABLE | \
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OH_MESH_ENABLE | OH_SCCA_IO | OH_SCCB_IO)
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/*
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* A magic value to put into the feature control register of the
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* "ohare" I/O controller on Starmaxes to enable the IDE CD interface.
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* Contributed by Harry Eaton.
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*/
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#define STARMAX_FEATURES 0xbeff7a
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