1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef _ASM_POWERPC_OHARE_H
3#define _ASM_POWERPC_OHARE_H
4#ifdef __KERNEL__
5/*
6 * ohare.h: definitions for using the "O'Hare" I/O controller chip.
7 *
8 * Copyright (C) 1997 Paul Mackerras.
9 *
10 * BenH: Changed to match those of heathrow (but not all of them). Please
11 *       check if I didn't break anything (especially the media bay).
12 */
13
14/* offset from ohare base for feature control register */
15#define OHARE_MBCR	0x34
16#define OHARE_FCR	0x38
17
18/*
19 * Bits in feature control register.
20 * These were mostly derived by experiment on a powerbook 3400
21 * and may differ for other machines.
22 */
23#define OH_SCC_RESET		1
24#define OH_BAY_POWER_N		2	/* a guess */
25#define OH_BAY_PCI_ENABLE	4	/* a guess */
26#define OH_BAY_IDE_ENABLE	8
27#define OH_BAY_FLOPPY_ENABLE	0x10
28#define OH_IDE0_ENABLE		0x20
29#define OH_IDE0_RESET_N		0x40	/* a guess */
30#define OH_BAY_DEV_MASK		0x1c
31#define OH_BAY_RESET_N		0x80
32#define OH_IOBUS_ENABLE		0x100	/* IOBUS seems to be IDE */
33#define OH_SCC_ENABLE		0x200
34#define OH_MESH_ENABLE		0x400
35#define OH_FLOPPY_ENABLE	0x800
36#define OH_SCCA_IO		0x4000
37#define OH_SCCB_IO		0x8000
38#define OH_VIA_ENABLE		0x10000	/* Is apparently wrong, to be verified */
39#define OH_IDE1_RESET_N		0x800000
40
41/*
42 * Bits to set in the feature control register on PowerBooks.
43 */
44#define PBOOK_FEATURES		(OH_IDE_ENABLE | OH_SCC_ENABLE | \
45				 OH_MESH_ENABLE | OH_SCCA_IO | OH_SCCB_IO)
46
47/*
48 * A magic value to put into the feature control register of the
49 * "ohare" I/O controller on Starmaxes to enable the IDE CD interface.
50 * Contributed by Harry Eaton.
51 */
52#define STARMAX_FEATURES	0xbeff7a
53
54#endif /* __KERNEL__ */
55#endif /* _ASM_POWERPC_OHARE_H */
56