1/*	$NetBSD: eisareg.h,v 1.7 2005/12/11 12:21:20 christos Exp $	*/
2
3/*
4 * Copyright (c) 1995, 1996 Christopher G. Demetriou
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 * 3. All advertising materials mentioning features or use of this software
16 *    must display the following acknowledgement:
17 *      This product includes software developed by Christopher G. Demetriou
18 *      for the NetBSD Project.
19 * 4. The name of the author may not be used to endorse or promote products
20 *    derived from this software without specific prior written permission
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
23 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
24 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
25 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
26 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
27 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
28 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
29 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
30 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
31 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32 */
33
34#ifndef __DEV_EISA_EISAREG_H__
35#define	__DEV_EISA_EISAREG_H__
36
37/*
38 * Register (etc.) descriptions for the EISA bus.
39 *
40 * Mostly culled from EISA chipset descriptions in:
41 *	Intel Peripheral Components Databook (1992)
42 */
43
44/*
45 * Slot I/O space size, and I/O address of a given slot.
46 */
47#define	EISA_SLOT_SIZE		0x1000
48#define	EISA_SLOT_ADDR(s)	((s) * EISA_SLOT_SIZE)
49
50/*
51 * Slot offsets for important/standard registers.
52 */
53#define	EISA_SLOTOFF_VID	0xc80		/* offset of vendor id regs */
54#define	EISA_NVIDREGS		2
55#define	EISA_SLOTOFF_PID	0xc82		/* offset of product id regs */
56#define	EISA_NPIDREGS		2
57
58
59/*
60 * EISA ID functions, used to manipulate and decode EISA ID registers.
61 * ``Somebody was let out without adult supervision.''
62 */
63
64#define	EISA_IDSTRINGLEN	8	/* length of ID string, incl. NUL */
65
66/*
67 * Vendor ID: three characters, encoded in 16 bits.
68 *
69 * EISA_VENDID_NODEV returns true if there's no device in the slot.
70 * EISA_VENDID_IDDELAY returns true if there's a device in the slot,
71 *	but that device hasn't been configured by system firmware.
72 * EISA_VENDID_n returns the "n"th character of the vendor ID.
73 */
74#define	EISA_VENDID_NODEV(vid)						\
75	    (((vid)[0] & 0x80) != 0)
76#define	EISA_VENDID_IDDELAY(vid)					\
77	    (((vid)[0] & 0xf0) == 0x70)
78#define	EISA_VENDID_0(vid)						\
79	    ((((vid)[0] & 0x7c) >> 2) + '@')
80#define	EISA_VENDID_1(vid)						\
81	    (((((vid)[0] & 0x03) << 3) | (((vid)[1] & 0xe0) >> 5)) + '@')
82#define	EISA_VENDID_2(vid)						\
83	    (((vid)[1] & 0x1f) + '@')
84
85/*
86 * Product ID: four hex digits, encoded in 16 bits (normal, sort of).
87 *
88 * EISA_PRIDID_n returns the "n"th hex digit of the product ID.
89 */
90#define	EISA_PRODID_0(pid)						\
91	    (HEXDIGITS[(((pid)[0] >> 4) & 0xf)])
92#define	EISA_PRODID_1(pid)						\
93	    (HEXDIGITS[(((pid)[0] >> 0) & 0xf)])
94#define	EISA_PRODID_2(pid)						\
95	    (HEXDIGITS[(((pid)[1] >> 4) & 0xf)])
96#define	EISA_PRODID_3(pid)						\
97	    (HEXDIGITS[(((pid)[1] >> 0) & 0xf)])
98
99/*
100 * Local defines
101 */
102#define EISA_INTRSTR_LEN	64
103#endif /* !__DEV_EISA_EISAREG_H__ */
104