1 /* $OpenBSD: mpu_isa.c,v 1.8 2022/04/06 18:59:28 naddy Exp $ */
2
3 /*
4 * Copyright (c) 2002 Sergey Smitienko. 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 * 3. The name of the author may not be used to endorse or promote products
15 * derived from this software without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
21 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
22 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
23 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
25 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
26 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
27 * OF THE POSSIBILITY OF SUCH DAMAGE.
28 */
29
30 #include <sys/param.h>
31 #include <sys/systm.h>
32 #include <sys/errno.h>
33 #include <sys/ioctl.h>
34 #include <sys/syslog.h>
35 #include <sys/device.h>
36
37 #include <machine/bus.h>
38
39 #include <sys/audioio.h>
40 #include <dev/midi_if.h>
41
42 #include <dev/isa/isavar.h>
43 #include <dev/isa/isadmavar.h>
44
45 #include <dev/ic/mpuvar.h>
46
47 int mpu_isa_match(struct device *, void *, void *);
48 void mpu_isa_attach(struct device *, struct device *, void *);
49 int mpu_test(bus_space_tag_t, int);
50
51 #ifdef AUDIO_DEBUG
52 #define DPRINTF(x) if (mpu_debug) printf x
53 int mpu_debug = 0;
54 #else
55 #define DPRINTF(x)
56 #endif
57
58 #define MPU_GETSTATUS(iot, ioh) (bus_space_read_1(iot, ioh, MPU_STATUS))
59
60 struct mpu_isa_softc {
61 struct device sc_dev;
62
63 struct mpu_softc sc_mpu;
64 };
65
66 const struct cfattach mpu_isa_ca = {
67 sizeof(struct mpu_isa_softc), mpu_isa_match, mpu_isa_attach
68 };
69
70 int
mpu_test(bus_space_tag_t iot,int iobase)71 mpu_test(bus_space_tag_t iot, int iobase) /* base port number to try */
72 {
73 bus_space_handle_t ioh;
74 int i, rc;
75
76 rc = 0;
77 if (bus_space_map(iot, iobase, MPU401_NPORT, 0, &ioh)) {
78 DPRINTF(("mpu_test: can't map: %x/2\n", iobase));
79 return (0);
80 }
81
82 DPRINTF(("mpu_test: trying: %x\n", iobase));
83
84 /*
85 * The following code is a shameless copy of mpu401.c
86 * it is here until a redesign of mpu_find() interface
87 */
88
89 if (MPU_GETSTATUS(iot, ioh) == 0xff)
90 goto done;
91
92 for (i = 0; i < MPU_MAXWAIT; i++) {
93 if (!(MPU_GETSTATUS(iot, ioh) & MPU_OUTPUT_BUSY)) {
94 rc = 1;
95 break;
96 }
97 delay (10);
98 }
99
100 if (rc == 1) {
101 bus_space_write_1(iot, ioh, MPU_COMMAND, MPU_RESET);
102 rc = 0;
103 for (i = 0; i < 2 * MPU_MAXWAIT; i++)
104 if (!(MPU_GETSTATUS(iot, ioh) & MPU_INPUT_EMPTY) &&
105 bus_space_read_1(iot, ioh, MPU_DATA) == MPU_ACK) {
106 rc = 1;
107 break;
108 }
109 }
110 done:
111 bus_space_unmap(iot, ioh, MPU401_NPORT);
112
113 return (rc);
114 }
115
116 int
mpu_isa_match(struct device * parent,void * match,void * aux)117 mpu_isa_match(struct device *parent, void *match, void *aux)
118 {
119 struct isa_attach_args *ia = aux;
120
121 if (mpu_test(ia->ia_iot, ia->ia_iobase)) {
122 ia->ia_iosize = MPU401_NPORT;
123 return (1);
124 }
125
126 return (0);
127 }
128
129 void
mpu_isa_attach(struct device * parent,struct device * self,void * aux)130 mpu_isa_attach(struct device *parent, struct device *self, void *aux)
131 {
132 struct mpu_isa_softc *sc = (struct mpu_isa_softc *)self;
133 struct isa_attach_args *ia = aux;
134
135 sc->sc_mpu.iot = ia->ia_iot;
136
137 if (bus_space_map (ia->ia_iot, ia->ia_iobase, MPU401_NPORT,
138 0, &sc->sc_mpu.ioh)) {
139 printf(": can't map i/o space\n");
140 return;
141 }
142
143 if (!mpu_find(&sc->sc_mpu)) {
144 printf(": find failed\n");
145 return;
146 }
147
148 printf(": generic MPU-401 compatible\n");
149
150 midi_attach_mi(&mpu_midi_hw_if, &sc->sc_mpu, &sc->sc_dev);
151 }
152