xref: /openbmc/linux/arch/mips/include/asm/sgi/gio.h (revision a701d28e)
1 /*
2  * This file is subject to the terms and conditions of the GNU General Public
3  * License. See the file "COPYING" in the main directory of this archive
4  * for more details.
5  *
6  * gio.h: Definitions for SGI GIO bus
7  *
8  * Copyright (C) 2002 Ladislav Michl
9  */
10 
11 #ifndef _SGI_GIO_H
12 #define _SGI_GIO_H
13 
14 /*
15  * GIO bus addresses
16  *
17  * The Indigo and Indy have two GIO bus connectors. Indigo2 (all models) have
18  * three physical connectors, but only two slots, GFX and EXP0.
19  *
20  * There is 10MB of GIO address space for GIO64 slot devices
21  * slot#   slot type address range	      size
22  * -----   --------- ----------------------- -----
23  *   0	   GFX	     0x1f000000 - 0x1f3fffff   4MB
24  *   1	   EXP0	     0x1f400000 - 0x1f5fffff   2MB
25  *   2	   EXP1	     0x1f600000 - 0x1f9fffff   4MB
26  *
27  * There are un-slotted devices, HPC, I/O and misc devices, which are grouped
28  * into the HPC address space.
29  *   -	   MISC	     0x1fb00000 - 0x1fbfffff   1MB
30  *
31  * Following space is reserved and unused
32  *   -	   RESERVED  0x18000000 - 0x1effffff 112MB
33  *
34  * GIO bus IDs
35  *
36  * Each GIO bus device identifies itself to the system by answering a
37  * read with an "ID" value. IDs are either 8 or 32 bits long. IDs less
38  * than 128 are 8 bits long, with the most significant 24 bits read from
39  * the slot undefined.
40  *
41  * 32-bit IDs are divided into
42  *	bits 0:6	the product ID; ranges from 0x00 to 0x7F.
43  *	bit 7		0=GIO Product ID is 8 bits wide
44  *			1=GIO Product ID is 32 bits wide.
45  *	bits 8:15	manufacturer version for the product.
46  *	bit 16		0=GIO32 and GIO32-bis, 1=GIO64.
47  *	bit 17		0=no ROM present
48  *			1=ROM present on this board AND next three words
49  *			space define the ROM.
50  *	bits 18:31	up to manufacturer.
51  *
52  * IDs above 0x50/0xd0 are of 3rd party boards.
53  *
54  * 8-bit IDs
55  *	0x01		XPI low cost FDDI
56  *	0x02		GTR TokenRing
57  *	0x04		Synchronous ISDN
58  *	0x05		ATM board [*]
59  *	0x06		Canon Interface
60  *	0x07		16 bit SCSI Card [*]
61  *	0x08		JPEG (Double Wide)
62  *	0x09		JPEG (Single Wide)
63  *	0x0a		XPI mez. FDDI device 0
64  *	0x0b		XPI mez. FDDI device 1
65  *	0x0c		SMPTE 259M Video [*]
66  *	0x0d		Babblefish Compression [*]
67  *	0x0e		E-Plex 8-port Ethernet
68  *	0x30		Lyon Lamb IVAS
69  *	0xb8		GIO 100BaseTX Fast Ethernet (gfe)
70  *
71  * [*] Device provide 32-bit ID.
72  *
73  */
74 
75 #define GIO_ID(x)		(x & 0x7f)
76 #define GIO_32BIT_ID		0x80
77 #define GIO_REV(x)		((x >> 8) & 0xff)
78 #define GIO_64BIT_IFACE		0x10000
79 #define GIO_ROM_PRESENT		0x20000
80 #define GIO_VENDOR_CODE(x)	((x >> 18) & 0x3fff)
81 
82 #define GIO_SLOT_GFX_BASE	0x1f000000
83 #define GIO_SLOT_EXP0_BASE	0x1f400000
84 #define GIO_SLOT_EXP1_BASE	0x1f600000
85 
86 #endif /* _SGI_GIO_H */
87