1/*	$NetBSD: io.c,v 1.3 2006/04/13 18:46:46 garbled Exp $	*/
2
3/*-
4 * Copyright (C) 1995-1997 Gary Thomas (gdt@linuxppc.org)
5 * All rights reserved.
6 *
7 * PCI/ISA I/O support
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 *    notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 *    notice, this list of conditions and the following disclaimer in the
16 *    documentation and/or other materials provided with the distribution.
17 * 3. All advertising materials mentioning features or use of this software
18 *    must display the following acknowledgement:
19 *      This product includes software developed by Gary Thomas.
20 * 4. The name of the author may not be used to endorse or promote products
21 *    derived from this software without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
24 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
25 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
26 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
27 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
28 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
29 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
30 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
31 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
32 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
33 */
34
35#include <lib/libsa/stand.h>
36#include <sys/bswap.h>
37#include "boot.h"
38
39#define PCI_NSLOTS	8
40#define PCI_NREGS	5
41#define PCI_DEVID	0
42#define PCI_CMD		1
43#define PCI_CLASS	2
44#define PCI_MEMBASE	4
45
46
47volatile u_char *ISA_io  = (u_char *)0x80000000;
48volatile u_char *ISA_mem = (u_char *)0xc0000000;
49volatile char *videomem = (char *)0xc00b8000; /* + vram offset */
50
51struct PCI_cinfo {
52	u_long *config_addr;
53	u_long regs[PCI_NREGS];
54} PCI_slots[PCI_NSLOTS] = {
55	{ (u_long *)0x80808000, {0xDEADBEEF,} },
56	{ (u_long *)0x80800800, {0xDEADBEEF,} },
57	{ (u_long *)0x80801000, {0xDEADBEEF,} },
58	{ (u_long *)0x80802000, {0xDEADBEEF,} },
59	{ (u_long *)0x80804000, {0xDEADBEEF,} },
60	{ (u_long *)0x80810000, {0xDEADBEEF,} },
61	{ (u_long *)0x80820000, {0xDEADBEEF,} },
62	{ (u_long *)0x80840000, {0xDEADBEEF,} },
63};
64
65void
66outb(int port, char val)
67{
68
69	ISA_io[port] = val;
70}
71
72inline void
73outw(int port, u_int16_t val)
74{
75        outb(port, val>>8);
76        outb(port+1, val);
77}
78
79u_char
80inb(int port)
81{
82
83	return (ISA_io[port]);
84}
85
86u_long
87local_to_PCI(u_long addr)
88{
89
90	return ((addr & 0x7FFFFFFF) | 0x80000000);
91}
92
93void
94unlockVideo(int slot)
95{
96	volatile u_int8_t *ppci;
97
98	ppci = (u_int8_t *)PCI_slots[slot].config_addr;
99	ppci[4] = 0x0003;	/* enable memory and IO Access */
100#if 0
101	ppci[0x10] = 0x00000;	/* Turn off memory mapping */
102	ppci[0x11] = 0x00000;	/* mem base = 0 */
103	ppci[0x12] = 0x00000;
104	ppci[0x13] = 0x00000;
105#endif
106	__asm__ volatile("eieio");
107
108	outb(0x3d4, 0x11);
109	outb(0x3d5, 0x0e);   /* unlock CR0-CR7 */
110}
111
112int
113scan_PCI(int start)
114{
115	int slot, r;
116	struct PCI_cinfo *pslot;
117	int VGAslot = -1;
118	int highVGAslot = 0;
119
120	for (slot = start + 1; slot < PCI_NSLOTS; slot++) {
121		pslot = &PCI_slots[slot];
122		for (r = 0; r < PCI_NREGS; r++)
123			pslot->regs[r] = bswap32(pslot->config_addr[r]);
124		if (pslot->regs[PCI_DEVID] != 0xffffffff) {
125			/* we have a card */
126			if (((pslot->regs[PCI_CLASS] & 0xffffff00) ==
127				0x03000000) ||
128			    ((pslot->regs[PCI_CLASS] & 0xffffff00) ==
129				0x00010000)) {
130				/* it's a VGA card */
131				highVGAslot = slot;
132				if ((pslot->regs[PCI_CMD] & 0x03)) {
133					/* fW enabled it */
134					VGAslot = slot;
135					break;
136				}
137			}
138		}
139	}
140	return VGAslot;
141}
142
143int
144PCI_vendor(int slotnum)
145{
146	struct PCI_cinfo *pslot = &PCI_slots[slotnum];
147
148	return (pslot->regs[PCI_DEVID] & 0xffff);
149}
150