Line data Source code
1 : /* $OpenBSD: mpu_isa.c,v 1.6 2015/03/14 03:38:47 jsg 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 : struct cfattach mpu_isa_ca = {
67 : sizeof(struct mpu_isa_softc), mpu_isa_match, mpu_isa_attach
68 : };
69 :
70 : int
71 0 : mpu_test (iot, iobase)
72 : bus_space_tag_t iot;
73 : int iobase; /* base port number to try */
74 : {
75 0 : bus_space_handle_t ioh;
76 : int i, rc;
77 :
78 : rc = 0;
79 0 : if (bus_space_map(iot, iobase, MPU401_NPORT, 0, &ioh)) {
80 : DPRINTF(("mpu_test: can't map: %x/2\n", iobase));
81 0 : return (0);
82 : }
83 :
84 : DPRINTF(("mpu_test: trying: %x\n", iobase));
85 :
86 : /*
87 : * The following code is a shameless copy of mpu401.c
88 : * it is here until a redesign of mpu_find() interface
89 : */
90 :
91 0 : if (MPU_GETSTATUS(iot, ioh) == 0xff)
92 : goto done;
93 :
94 0 : for (i = 0; i < MPU_MAXWAIT; i++) {
95 0 : if (!(MPU_GETSTATUS(iot, ioh) & MPU_OUTPUT_BUSY)) {
96 : rc = 1;
97 0 : break;
98 : }
99 0 : delay (10);
100 : }
101 :
102 0 : if (rc == 1) {
103 0 : bus_space_write_1(iot, ioh, MPU_COMMAND, MPU_RESET);
104 : rc = 0;
105 0 : for (i = 0; i < 2 * MPU_MAXWAIT; i++)
106 0 : if (!(MPU_GETSTATUS(iot, ioh) & MPU_INPUT_EMPTY) &&
107 0 : bus_space_read_1(iot, ioh, MPU_DATA) == MPU_ACK) {
108 : rc = 1;
109 0 : break;
110 : }
111 : }
112 : done:
113 0 : bus_space_unmap(iot, ioh, MPU401_NPORT);
114 :
115 0 : return (rc);
116 0 : }
117 :
118 : int
119 0 : mpu_isa_match(parent, match, aux)
120 : struct device *parent;
121 : void *match, *aux;
122 : {
123 0 : struct isa_attach_args *ia = aux;
124 :
125 0 : if (mpu_test(ia->ia_iot, ia->ia_iobase)) {
126 0 : ia->ia_iosize = MPU401_NPORT;
127 0 : return (1);
128 : }
129 :
130 0 : return (0);
131 0 : }
132 :
133 : void
134 0 : mpu_isa_attach(parent, self, aux)
135 : struct device *parent, *self;
136 : void *aux;
137 : {
138 0 : struct mpu_isa_softc *sc = (struct mpu_isa_softc *)self;
139 0 : struct isa_attach_args *ia = aux;
140 :
141 0 : sc->sc_mpu.iot = ia->ia_iot;
142 :
143 0 : if (bus_space_map (ia->ia_iot, ia->ia_iobase, MPU401_NPORT,
144 0 : 0, &sc->sc_mpu.ioh)) {
145 0 : printf(": can't map i/o space\n");
146 0 : return;
147 : }
148 :
149 0 : if (!mpu_find(&sc->sc_mpu)) {
150 0 : printf(": find failed\n");
151 0 : return;
152 : }
153 :
154 0 : printf(": generic MPU-401 compatible\n");
155 :
156 0 : midi_attach_mi(&mpu_midi_hw_if, &sc->sc_mpu, &sc->sc_dev);
157 0 : }
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