1/* $NetBSD: npx_acpi.c,v 1.18 2009/02/21 00:30:37 jmcneill Exp $ */
2
3/*
4 * Copyright (c) 2002 Jared D. McNeill <jmcneill@invisible.ca>
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. The name of the author may not be used to endorse or promote products
13 *    derived from this software without specific prior written permission.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
20 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
21 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
22 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
23 * 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: npx_acpi.c,v 1.18 2009/02/21 00:30:37 jmcneill Exp $");
30
31#include <sys/param.h>
32#include <sys/systm.h>
33#include <sys/device.h>
34
35#include <sys/bus.h>
36#include <machine/cpufunc.h>
37#include <machine/intr.h>
38#include <machine/specialreg.h>
39
40#include <dev/isa/isavar.h>
41#include <dev/isa/isadmavar.h>
42
43#include <dev/acpi/acpica.h>
44#include <dev/acpi/acpireg.h>
45#include <dev/acpi/acpivar.h>
46
47#include <i386/isa/npxvar.h>
48
49static int	npx_acpi_match(device_t, cfdata_t, void *);
50static void	npx_acpi_attach(device_t, device_t, void *);
51
52CFATTACH_DECL_NEW(npx_acpi, sizeof(struct npx_softc), npx_acpi_match,
53    npx_acpi_attach, NULL, NULL);
54
55/*
56 * Supported device IDs
57 */
58
59static const char * const npx_acpi_ids[] = {
60	"PNP0C04",	/* Math Coprocessor */
61	NULL
62};
63
64/*
65 * npx_acpi_match: autoconf(9) match routine
66 */
67static int
68npx_acpi_match(device_t parent, cfdata_t match, void *aux)
69{
70	struct acpi_attach_args *aa = aux;
71
72	if (aa->aa_node->ad_type != ACPI_TYPE_DEVICE)
73		return 0;
74
75	return acpi_match_hid(aa->aa_node->ad_devinfo, npx_acpi_ids);
76}
77
78/*
79 * npx_acpi_attach: autoconf(9) attach routine
80 */
81static void
82npx_acpi_attach(device_t parent, device_t self, void *aux)
83{
84	struct npx_softc *sc = device_private(self);
85	struct acpi_attach_args *aa = aux;
86	struct acpi_resources res;
87	struct acpi_io *io;
88	struct acpi_irq *irq;
89	ACPI_STATUS rv;
90
91	sc->sc_dev = self;
92
93	/* parse resources */
94	rv = acpi_resource_parse(sc->sc_dev, aa->aa_node->ad_handle, "_CRS",
95	    &res, &acpi_resource_parse_ops_default);
96	if (ACPI_FAILURE(rv))
97		return;
98
99	/* find our i/o registers */
100	io = acpi_res_io(&res, 0);
101	if (io == NULL) {
102		aprint_error_dev(self,
103		    "unable to find i/o register resource\n");
104		goto out;
105	}
106
107	/* find our IRQ */
108	irq = acpi_res_irq(&res, 0);
109	if (irq == NULL) {
110		aprint_error_dev(self, "unable to find irq resource\n");
111		goto out;
112	}
113
114	sc->sc_iot = aa->aa_iot;
115	if (bus_space_map(sc->sc_iot, io->ar_base, io->ar_length,
116		    0, &sc->sc_ioh)) {
117		aprint_error_dev(self, "can't map i/o space\n");
118		goto out;
119	}
120
121	sc->sc_type = npxprobe1(sc->sc_iot, sc->sc_ioh, irq->ar_irq);
122
123	switch (sc->sc_type) {
124	case NPX_INTERRUPT:
125		lcr0(rcr0() & ~CR0_NE);
126		sc->sc_ih = isa_intr_establish(aa->aa_ic, irq->ar_irq,
127		    (irq->ar_type == ACPI_EDGE_SENSITIVE) ? IST_EDGE:IST_LEVEL,
128		    IPL_NONE, (int (*)(void *))npxintr, NULL);
129		break;
130	case NPX_EXCEPTION:
131		/*FALLTHROUGH*/
132	case NPX_CPUID:
133		aprint_verbose_dev(self, "%susing exception 16\n",
134		    sc->sc_type == NPX_CPUID ? "reported by CPUID; " : "");
135		sc->sc_type = NPX_EXCEPTION;
136		break;
137	case NPX_BROKEN:
138		aprint_error_dev(self, "error reporting broken; not using\n");
139		sc->sc_type = NPX_NONE;
140		goto out;
141	case NPX_NONE:
142		panic("npx_acpi_attach");
143	}
144
145	npxattach(sc);
146
147 out:
148	acpi_resource_cleanup(&res);
149}
150