lm_isa_common.c revision 1.6 
1/*	$NetBSD: lm_isa_common.c,v 1.6 2017/08/18 04:07:51 msaitoh 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_isa_common.c,v 1.6 2017/08/18 04:07:51 msaitoh Exp $");
34
35#include <sys/param.h>
36#include <sys/systm.h>
37#include <sys/kernel.h>
38#include <sys/device.h>
39#include <sys/module.h>
40#include <sys/conf.h>
41
42#include <sys/bus.h>
43
44#include <dev/isa/isareg.h>
45#include <dev/isa/isavar.h>
46
47#include <dev/ic/nslm7xvar.h>
48
49int 	lm_isa_match(device_t, cfdata_t, void *);
50void 	lm_isa_attach(device_t, device_t, void *);
51int 	lm_isa_detach(device_t, int);
52
53static uint8_t 	lm_isa_readreg(struct lm_softc *, int);
54static void 	lm_isa_writereg(struct lm_softc *, int, uint8_t);
55
56struct lm_isa_softc {
57	struct lm_softc lmsc;
58	bus_space_tag_t lm_iot;
59	bus_space_handle_t lm_ioh;
60};
61
62int
63lm_isa_match(device_t parent, cfdata_t match, void *aux)
64{
65	bus_space_handle_t ioh;
66	struct isa_attach_args *ia = aux;
67	struct lm_isa_softc sc;
68	int rv;
69
70	/* Must supply an address */
71	if (ia->ia_nio < 1)
72		return 0;
73
74	if (ISA_DIRECT_CONFIG(ia))
75		return 0;
76
77	if (ia->ia_io[0].ir_addr == ISA_UNKNOWN_PORT)
78		return 0;
79
80	if (bus_space_map(ia->ia_iot, ia->ia_io[0].ir_addr, 8, 0, &ioh))
81		return 0;
82
83	/* Bus independent probe */
84	sc.lm_iot = ia->ia_iot;
85	sc.lm_ioh = ioh;
86	sc.lmsc.lm_writereg = lm_isa_writereg;
87	sc.lmsc.lm_readreg = lm_isa_readreg;
88	rv = lm_match(&sc.lmsc);
89
90	bus_space_unmap(ia->ia_iot, ioh, 8);
91
92	if (rv) {
93		ia->ia_nio = 1;
94		ia->ia_io[0].ir_size = 8;
95
96		ia->ia_niomem = 0;
97		ia->ia_nirq = 0;
98		ia->ia_ndrq = 0;
99	}
100
101	return rv;
102}
103
104
105void
106lm_isa_attach(device_t parent, device_t self, void *aux)
107{
108	struct lm_isa_softc *sc = device_private(self);
109	struct isa_attach_args *ia = aux;
110
111	sc->lm_iot = ia->ia_iot;
112
113	if (bus_space_map(ia->ia_iot, ia->ia_io[0].ir_addr, 8, 0,
114	    &sc->lm_ioh)) {
115		aprint_error(": can't map i/o space\n");
116		return;
117	}
118
119	/* Bus-independent attachment */
120	sc->lmsc.sc_dev = self;
121	sc->lmsc.lm_writereg = lm_isa_writereg;
122	sc->lmsc.lm_readreg = lm_isa_readreg;
123	/* pass wbsio Device ID */
124	sc->lmsc.sioid = (uint16_t)(uintptr_t)ia->ia_aux;
125
126	lm_attach(&sc->lmsc);
127}
128
129int
130lm_isa_detach(device_t self, int flags)
131{
132	struct lm_isa_softc *sc = device_private(self);
133
134	lm_detach(&sc->lmsc);
135	bus_space_unmap(sc->lm_iot, sc->lm_ioh, 8);
136	return 0;
137}
138
139static uint8_t
140lm_isa_readreg(struct lm_softc *lmsc, int reg)
141{
142	struct lm_isa_softc *sc = (struct lm_isa_softc *)lmsc;
143
144	bus_space_write_1(sc->lm_iot, sc->lm_ioh, LMC_ADDR, reg);
145	return bus_space_read_1(sc->lm_iot, sc->lm_ioh, LMC_DATA);
146}
147
148static void
149lm_isa_writereg(struct lm_softc *lmsc, int reg, uint8_t val)
150{
151	struct lm_isa_softc *sc = (struct lm_isa_softc *)lmsc;
152
153	bus_space_write_1(sc->lm_iot, sc->lm_ioh, LMC_ADDR, reg);
154	bus_space_write_1(sc->lm_iot, sc->lm_ioh, LMC_DATA, val);
155}
156
157MODULE(MODULE_CLASS_DRIVER, lm_isa_common, "lm");
158
159static int
160lm_isa_common_modcmd(modcmd_t cmd, void *priv)
161{
162	if ((cmd == MODULE_CMD_INIT) || (cmd == MODULE_CMD_FINI))
163		return 0;
164	return ENOTTY;
165}
166