include/asm/ohare.h

0001 /* SPDX-License-Identifier: GPL-2.0 */
0002 #ifndef _ASM_POWERPC_OHARE_H
0003 #define _ASM_POWERPC_OHARE_H
0004 #ifdef __KERNEL__
0005 /*
0006  * ohare.h: definitions for using the "O'Hare" I/O controller chip.
0007  *
0008  * Copyright (C) 1997 Paul Mackerras.
0009  *
0010  * BenH: Changed to match those of heathrow (but not all of them). Please
0011  *       check if I didn't break anything (especially the media bay).
0012  */
0013
0014 /* offset from ohare base for feature control register */
0015 #define OHARE_MBCR  0x34
0016 #define OHARE_FCR   0x38
0017
0018 /*
0019  * Bits in feature control register.
0020  * These were mostly derived by experiment on a powerbook 3400
0021  * and may differ for other machines.
0022  */
0023 #define OH_SCC_RESET        1
0024 #define OH_BAY_POWER_N      2   /* a guess */
0025 #define OH_BAY_PCI_ENABLE   4   /* a guess */
0026 #define OH_BAY_IDE_ENABLE   8
0027 #define OH_BAY_FLOPPY_ENABLE    0x10
0028 #define OH_IDE0_ENABLE      0x20
0029 #define OH_IDE0_RESET_N     0x40    /* a guess */
0030 #define OH_BAY_DEV_MASK     0x1c
0031 #define OH_BAY_RESET_N      0x80
0032 #define OH_IOBUS_ENABLE     0x100   /* IOBUS seems to be IDE */
0033 #define OH_SCC_ENABLE       0x200
0034 #define OH_MESH_ENABLE      0x400
0035 #define OH_FLOPPY_ENABLE    0x800
0036 #define OH_SCCA_IO      0x4000
0037 #define OH_SCCB_IO      0x8000
0038 #define OH_VIA_ENABLE       0x10000 /* Is apparently wrong, to be verified */
0039 #define OH_IDE1_RESET_N     0x800000
0040
0041 /*
0042  * Bits to set in the feature control register on PowerBooks.
0043  */
0044 #define PBOOK_FEATURES      (OH_IDE_ENABLE | OH_SCC_ENABLE | \
0045                  OH_MESH_ENABLE | OH_SCCA_IO | OH_SCCB_IO)
0046
0047 /*
0048  * A magic value to put into the feature control register of the
0049  * "ohare" I/O controller on Starmaxes to enable the IDE CD interface.
0050  * Contributed by Harry Eaton.
0051  */
0052 #define STARMAX_FEATURES    0xbeff7a
0053
0054 #endif /* __KERNEL__ */
0055 #endif /* _ASM_POWERPC_OHARE_H */