1 /* $NetBSD: lm_isa_common.c,v 1.7 2020/06/24 19:11:49 jdolecek 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 1.7 2020/06/24 19:11:49 jdolecek 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 #include <sys/kmem.h>
42
43 #include <sys/bus.h>
44
45 #include <dev/isa/isareg.h>
46 #include <dev/isa/isavar.h>
47
48 #include <dev/ic/nslm7xvar.h>
49
50 int lm_isa_match(device_t, cfdata_t, void *);
51 void lm_isa_attach(device_t, device_t, void *);
52 int lm_isa_detach(device_t, int);
53
54 static uint8_t lm_isa_readreg(struct lm_softc *, int);
55 static void lm_isa_writereg(struct lm_softc *, int, uint8_t);
56
57 struct lm_isa_softc {
58 struct lm_softc lmsc;
59 bus_space_tag_t lm_iot;
60 bus_space_handle_t lm_ioh;
61 };
62
63 int
lm_isa_match(device_t parent,cfdata_t match,void * aux)64 lm_isa_match(device_t parent, cfdata_t match, void *aux)
65 {
66 bus_space_handle_t ioh;
67 struct isa_attach_args *ia = aux;
68 struct lm_isa_softc *sc;
69 int rv;
70
71 /* Must supply an address */
72 if (ia->ia_nio < 1)
73 return 0;
74
75 if (ISA_DIRECT_CONFIG(ia))
76 return 0;
77
78 if (ia->ia_io[0].ir_addr == ISA_UNKNOWN_PORT)
79 return 0;
80
81 if (bus_space_map(ia->ia_iot, ia->ia_io[0].ir_addr, 8, 0, &ioh))
82 return 0;
83
84 /* Bus independent probe */
85 sc = kmem_zalloc(sizeof(*sc), KM_SLEEP);
86 sc->lm_iot = ia->ia_iot;
87 sc->lm_ioh = ioh;
88 sc->lmsc.lm_writereg = lm_isa_writereg;
89 sc->lmsc.lm_readreg = lm_isa_readreg;
90 rv = lm_match(&sc->lmsc);
91 kmem_free(sc, sizeof(*sc));
92
93 bus_space_unmap(ia->ia_iot, ioh, 8);
94
95 if (rv) {
96 ia->ia_nio = 1;
97 ia->ia_io[0].ir_size = 8;
98
99 ia->ia_niomem = 0;
100 ia->ia_nirq = 0;
101 ia->ia_ndrq = 0;
102 }
103
104 return rv;
105 }
106
107
108 void
lm_isa_attach(device_t parent,device_t self,void * aux)109 lm_isa_attach(device_t parent, device_t self, void *aux)
110 {
111 struct lm_isa_softc *sc = device_private(self);
112 struct isa_attach_args *ia = aux;
113
114 sc->lm_iot = ia->ia_iot;
115
116 if (bus_space_map(ia->ia_iot, ia->ia_io[0].ir_addr, 8, 0,
117 &sc->lm_ioh)) {
118 aprint_error(": can't map i/o space\n");
119 return;
120 }
121
122 /* Bus-independent attachment */
123 sc->lmsc.sc_dev = self;
124 sc->lmsc.lm_writereg = lm_isa_writereg;
125 sc->lmsc.lm_readreg = lm_isa_readreg;
126 /* pass wbsio Device ID */
127 sc->lmsc.sioid = (uint16_t)(uintptr_t)ia->ia_aux;
128
129 lm_attach(&sc->lmsc);
130 }
131
132 int
lm_isa_detach(device_t self,int flags)133 lm_isa_detach(device_t self, int flags)
134 {
135 struct lm_isa_softc *sc = device_private(self);
136
137 lm_detach(&sc->lmsc);
138 bus_space_unmap(sc->lm_iot, sc->lm_ioh, 8);
139 return 0;
140 }
141
142 static uint8_t
lm_isa_readreg(struct lm_softc * lmsc,int reg)143 lm_isa_readreg(struct lm_softc *lmsc, int reg)
144 {
145 struct lm_isa_softc *sc = (struct lm_isa_softc *)lmsc;
146
147 bus_space_write_1(sc->lm_iot, sc->lm_ioh, LMC_ADDR, reg);
148 return bus_space_read_1(sc->lm_iot, sc->lm_ioh, LMC_DATA);
149 }
150
151 static void
lm_isa_writereg(struct lm_softc * lmsc,int reg,uint8_t val)152 lm_isa_writereg(struct lm_softc *lmsc, int reg, uint8_t val)
153 {
154 struct lm_isa_softc *sc = (struct lm_isa_softc *)lmsc;
155
156 bus_space_write_1(sc->lm_iot, sc->lm_ioh, LMC_ADDR, reg);
157 bus_space_write_1(sc->lm_iot, sc->lm_ioh, LMC_DATA, val);
158 }
159
160 MODULE(MODULE_CLASS_DRIVER, lm_isa_common, "lm");
161
162 static int
lm_isa_common_modcmd(modcmd_t cmd,void * priv)163 lm_isa_common_modcmd(modcmd_t cmd, void *priv)
164 {
165 if ((cmd == MODULE_CMD_INIT) || (cmd == MODULE_CMD_FINI))
166 return 0;
167 return ENOTTY;
168 }
169