lm_pnpbios.c revision 1.15 
1/*	$NetBSD: lm_pnpbios.c,v 1.15 2011/07/01 18:14:15 dyoung Exp $ */
2
3/*-
4 * Copyright (c) 2000 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Bill Squier.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 *    notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 *    notice, this list of conditions and the following disclaimer in the
17 *    documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31
32#include <sys/cdefs.h>
33__KERNEL_RCSID(0, "$NetBSD: lm_pnpbios.c,v 1.15 2011/07/01 18:14:15 dyoung Exp $");
34
35#include <sys/param.h>
36#include <sys/systm.h>
37#include <sys/errno.h>
38#include <sys/ioctl.h>
39#include <sys/syslog.h>
40#include <sys/device.h>
41#include <sys/proc.h>
42
43#include <sys/bus.h>
44
45#include <dev/isa/isavar.h>
46#include <dev/isa/isadmavar.h>
47
48#include <i386/pnpbios/pnpbiosvar.h>
49
50#include <dev/sysmon/sysmonvar.h>
51
52#include <dev/ic/nslm7xvar.h>
53
54
55int 	lm_pnpbios_match(device_t, cfdata_t, void *);
56void 	lm_pnpbios_attach(device_t, device_t, void *);
57
58int 	lm_pnpbios_hints_index(const char *);
59uint8_t lm_pnpbios_readreg(struct lm_softc *, int);
60void 	lm_pnpbios_writereg(struct lm_softc *, int, int);
61
62
63CFATTACH_DECL_NEW(lm_pnpbios, sizeof(struct lm_softc),
64    lm_pnpbios_match, lm_pnpbios_attach, NULL, NULL);
65
66/*
67 * XXX - no known pnpbios ids for lm series chips.
68 */
69struct lm_pnpbios_hint {
70	char idstr[8];
71	int io_region_idx_lm7x;
72};
73
74/*
75 * Currently no known valid pnpbios id's - PNP0C02 is
76 * for reserved motherboard resources, probing it is bad.
77 */
78struct lm_pnpbios_hint lm_pnpbios_hints[] = {
79	{ { 0 }, 0 }
80};
81
82
83int
84lm_pnpbios_hints_index(const char *idstr)
85{
86	int idx = 0;
87
88	while (lm_pnpbios_hints[idx].idstr[0] != 0) {
89		if (!strcmp(lm_pnpbios_hints[idx].idstr, idstr))
90			return idx;
91		++idx;
92	}
93
94	return -1;
95}
96
97int
98lm_pnpbios_match(device_t parent, cfdata_t match, void *aux)
99{
100	struct pnpbiosdev_attach_args *aa = aux;
101	struct lm_pnpbios_hint *wph;
102	bus_space_tag_t iot;
103	bus_space_handle_t ioh;
104	int rv;
105
106	int wphi;
107
108	if ((wphi = lm_pnpbios_hints_index(aa->idstr)) == -1)
109		return 0;
110
111	wph = &lm_pnpbios_hints[wphi];
112
113	if (pnpbios_io_map(aa->pbt, aa->resc, wph->io_region_idx_lm7x,
114			   &iot, &ioh)) {
115		return 0;
116	}
117
118	rv = lm_probe(iot, ioh);
119
120	pnpbios_io_unmap(aa->pbt, aa->resc, wph->io_region_idx_lm7x,
121			 iot, ioh);
122
123	return rv;
124}
125
126void
127lm_pnpbios_attach(device_t parent, device_t self, void *aux)
128{
129	struct lm_softc *sc = device_private(self);
130	struct pnpbiosdev_attach_args *aa = aux;
131	struct lm_pnpbios_hint *wph;
132
133	wph = &lm_pnpbios_hints[lm_pnpbios_hints_index(aa->idstr)];
134
135	if (pnpbios_io_map(aa->pbt, aa->resc, wph->io_region_idx_lm7x,
136			   &sc->lm_iot, &sc->lm_ioh)) {
137		aprint_error(": can't map i/o space\n");
138		return;
139	}
140
141	aprint_naive("\n");
142	aprint_normal("\n");
143	pnpbios_print_devres(self, aa);
144
145	/* Bus-independent attach */
146	sc->lm_writereg = lm_pnpbios_writereg;
147	sc->lm_readreg = lm_pnpbios_readreg;
148
149	lm_attach(sc);
150}
151
152uint8_t
153lm_pnpbios_readreg(struct lm_softc *sc, int reg)
154{
155	bus_space_write_1(sc->lm_iot, sc->lm_ioh, LMC_ADDR, reg);
156	return (bus_space_read_1(sc->lm_iot, sc->lm_ioh, LMC_DATA));
157}
158
159
160void
161lm_pnpbios_writereg(struct lm_softc *sc, int reg, int val)
162{
163	bus_space_write_1(sc->lm_iot, sc->lm_ioh, LMC_ADDR, reg);
164	bus_space_write_1(sc->lm_iot, sc->lm_ioh, LMC_DATA, val);
165}
166