pcib.c revision 1.5 
1/*	$NetBSD: pcib.c,v 1.5 2002/09/27 20:31:19 thorpej Exp $	*/
2
3/*
4 * Copyright (c) 2000 Soren S. Jorvang.  All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 *    notice, this list of conditions, and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 *    notice, this list of conditions and the following disclaimer in the
13 *    documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25 * SUCH DAMAGE.
26 */
27
28#include <sys/types.h>
29#include <sys/param.h>
30#include <sys/systm.h>
31#include <sys/device.h>
32#include <sys/malloc.h>
33
34#include <machine/cpu.h>
35#include <machine/bus.h>
36#include <machine/autoconf.h>
37#include <machine/intr.h>
38#include <machine/intr_machdep.h>
39
40#include <dev/pci/pcivar.h>
41#include <dev/pci/pcireg.h>
42#include <dev/pci/pcidevs.h>
43
44#include <dev/isa/isareg.h>
45
46static int	pcib_match(struct device *, struct cfdata *, void *);
47static void	pcib_attach(struct device *, struct device *, void *);
48static int	icu_intr(void *);
49
50const struct cfattach pcib_ca = {
51	sizeof(struct device), pcib_match, pcib_attach
52};
53
54static struct cobalt_intr icu[IO_ICUSIZE];
55
56static int
57pcib_match(parent, match, aux)
58	struct device *parent;
59	struct cfdata *match;
60	void *aux;
61{
62	struct pci_attach_args *pa = aux;
63
64	if ((PCI_VENDOR(pa->pa_id) == PCI_VENDOR_VIATECH) &&
65	    (PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_VIATECH_VT82C586_ISA))
66		return 1;
67
68	return 0;
69}
70
71static void
72pcib_attach(parent, self, aux)
73	struct device *parent;
74	struct device *self;
75	void *aux;
76{
77	struct pci_attach_args *pa = aux;
78	char devinfo[256];
79
80	pci_devinfo(pa->pa_id, pa->pa_class, 0, devinfo);
81	printf("\n%s: %s, rev %d\n", self->dv_xname, devinfo,
82					PCI_REVISION(pa->pa_class));
83
84	/*
85	 * Initialize ICU. Since we block all these interrupts with
86	 * splbio(), we can just enable all of them all the time here.
87	 */
88	*(volatile u_int8_t *)MIPS_PHYS_TO_KSEG1(0x10000000 + IO_ICU1) = 0x10;
89	*(volatile u_int8_t *)MIPS_PHYS_TO_KSEG1(0x10000000 + IO_ICU1+1) = 0xff;
90	*(volatile u_int8_t *)MIPS_PHYS_TO_KSEG1(0x10000000 + IO_ICU2) = 0x10;
91	*(volatile u_int8_t *)MIPS_PHYS_TO_KSEG1(0x10000000 + IO_ICU2+1) = 0xff;
92	wbflush();
93
94	cpu_intr_establish(4, IPL_NONE, icu_intr, NULL);
95}
96
97void *
98icu_intr_establish(irq, type, level, func, arg)
99        int irq;
100        int type;
101        int level;
102        int (*func)(void *);
103        void *arg;
104{
105	int i;
106
107	for (i = 0; i < IO_ICUSIZE; i++) {
108		if (icu[i].func == NULL) {
109			icu[i].cookie_type = COBALT_COOKIE_TYPE_ICU;
110			icu[i].func = func;
111			icu[i].arg = arg;
112			return &icu[i];
113		}
114	}
115
116	panic("too many IRQs");
117}
118
119void
120icu_intr_disestablish(cookie)
121	void *cookie;
122{
123	struct cobalt_intr *p = cookie;
124
125	if (p->cookie_type == COBALT_COOKIE_TYPE_ICU) {
126		p->func = NULL;
127		p->arg = NULL;
128	}
129}
130
131int
132icu_intr(arg)
133	void *arg;
134{
135	int i;
136
137	for (i = 0; i < IO_ICUSIZE; i++) {
138		if (icu[i].func == NULL)
139			return 0;
140
141		(*icu[i].func)(icu[i].arg);
142	}
143
144	return 0;
145}
146