pcib.c revision 1.13 
1/*	$NetBSD: pcib.c,v 1.13 2006/04/21 15:46:07 tsutsui 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/cdefs.h>
29__KERNEL_RCSID(0, "$NetBSD: pcib.c,v 1.13 2006/04/21 15:46:07 tsutsui Exp $");
30
31#include <sys/types.h>
32#include <sys/param.h>
33#include <sys/systm.h>
34#include <sys/device.h>
35#include <sys/malloc.h>
36
37#include <machine/cpu.h>
38#include <machine/bus.h>
39#include <machine/autoconf.h>
40#include <machine/intr.h>
41
42#include <dev/pci/pcivar.h>
43#include <dev/pci/pcireg.h>
44#include <dev/pci/pcidevs.h>
45
46#include <dev/isa/isareg.h>
47
48#define PCIB_BASE	0x10000000	/* XXX */
49
50static int	pcib_match(struct device *, struct cfdata *, void *);
51static void	pcib_attach(struct device *, struct device *, void *);
52static int	icu_intr(void *);
53
54CFATTACH_DECL(pcib, sizeof(struct device),
55    pcib_match, pcib_attach, NULL, NULL);
56
57static struct cobalt_intrhand icu[IO_ICUSIZE];
58
59static int
60pcib_match(struct device *parent, struct cfdata *match, 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(struct device *parent, struct device *self, void *aux)
73{
74	struct pci_attach_args *pa = aux;
75	char devinfo[256];
76
77	pci_devinfo(pa->pa_id, pa->pa_class, 0, devinfo, sizeof(devinfo));
78	printf("\n%s: %s, rev %d\n", self->dv_xname, devinfo,
79	    PCI_REVISION(pa->pa_class));
80
81	/*
82	 * Initialize ICU. Since we block all these interrupts with
83	 * splbio(), we can just enable all of them all the time here.
84	 */
85	*(volatile uint8_t *)MIPS_PHYS_TO_KSEG1(PCIB_BASE + IO_ICU1) = 0x10;
86	*(volatile uint8_t *)MIPS_PHYS_TO_KSEG1(PCIB_BASE + IO_ICU1 + 1) = 0xff;
87	*(volatile uint8_t *)MIPS_PHYS_TO_KSEG1(PCIB_BASE + IO_ICU2) = 0x10;
88	*(volatile uint8_t *)MIPS_PHYS_TO_KSEG1(PCIB_BASE + IO_ICU2 + 1) = 0xff;
89	wbflush();
90
91	cpu_intr_establish(4, IPL_NONE, icu_intr, NULL);
92}
93
94void *
95icu_intr_establish(int irq, int type, int level, int (*func)(void *),
96    void *arg)
97{
98	int i;
99
100	for (i = 0; i < IO_ICUSIZE; i++) {
101		if (icu[i].ih_func == NULL) {
102			icu[i].cookie_type = COBALT_COOKIE_TYPE_ICU;
103			icu[i].ih_func = func;
104			icu[i].ih_arg = arg;
105			return &icu[i];
106		}
107	}
108
109	panic("too many IRQs");
110}
111
112void
113icu_intr_disestablish(void *cookie)
114{
115	struct cobalt_intrhand *ih = cookie;
116
117	if (ih->cookie_type == COBALT_COOKIE_TYPE_ICU) {
118		ih->ih_func = NULL;
119		ih->ih_arg = NULL;
120	}
121}
122
123int
124icu_intr(void *arg)
125{
126	int i;
127
128	for (i = 0; i < IO_ICUSIZE; i++) {
129		if (icu[i].ih_func == NULL)
130			return 0;
131
132		(*icu[i].ih_func)(icu[i].ih_arg);
133	}
134
135	return 0;
136}
137