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