Annotation of sys/dev/isa/mpu_isa.c, Revision 1.1.1.1
1.1 nbrk 1: /* $OpenBSD: mpu_isa.c,v 1.3 2003/01/29 20:35:13 mickey 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: #include <sys/proc.h>
37:
38: #include <machine/bus.h>
39:
40: #include <sys/audioio.h>
41: #include <dev/audio_if.h>
42: #include <dev/midi_if.h>
43:
44: #include <dev/isa/isavar.h>
45: #include <dev/isa/isadmavar.h>
46:
47: #include <dev/ic/mpuvar.h>
48:
49: int mpu_isa_match(struct device *, void *, void *);
50: void mpu_isa_attach(struct device *, struct device *, void *);
51: int mpu_test(bus_space_tag_t, int);
52:
53: #ifdef AUDIO_DEBUG
54: #define DPRINTF(x) if (mpu_debug) printf x
55: int mpu_debug = 0;
56: #else
57: #define DPRINTF(x)
58: #endif
59:
60: #define MPU_GETSTATUS(iot, ioh) (bus_space_read_1(iot, ioh, MPU_STATUS))
61:
62: struct mpu_isa_softc {
63: struct device sc_dev;
64:
65: struct mpu_softc sc_mpu;
66: };
67:
68: struct cfattach mpu_isa_ca = {
69: sizeof(struct mpu_isa_softc), mpu_isa_match, mpu_isa_attach
70: };
71:
72: int
73: mpu_test (iot, iobase)
74: bus_space_tag_t iot;
75: int iobase; /* base port number to try */
76: {
77: bus_space_handle_t ioh;
78: int i, rc;
79:
80: rc = 0;
81: if (bus_space_map(iot, iobase, MPU401_NPORT, 0, &ioh)) {
82: DPRINTF(("mpu_test: can`t map: %x/2\n", iobase));
83: return (0);
84: }
85:
86: DPRINTF(("mpu_test: trying: %x\n", iobase));
87:
88: /*
89: * The following code is a shameless copy of mpu401.c
90: * it is here until a redesign of mpu_find() interface
91: */
92:
93: if (MPU_GETSTATUS(iot, ioh) == 0xff)
94: goto done;
95:
96: for (i = 0; i < MPU_MAXWAIT; i++) {
97: if (!(MPU_GETSTATUS(iot, ioh) & MPU_OUTPUT_BUSY)) {
98: rc = 1;
99: break;
100: }
101: delay (10);
102: }
103:
104: if (rc == 1) {
105: bus_space_write_1(iot, ioh, MPU_COMMAND, MPU_RESET);
106: rc = 0;
107: for (i = 0; i < 2 * MPU_MAXWAIT; i++)
108: if (!(MPU_GETSTATUS(iot, ioh) & MPU_INPUT_EMPTY) &&
109: bus_space_read_1(iot, ioh, MPU_DATA) == MPU_ACK) {
110: rc = 1;
111: break;
112: }
113: }
114: done:
115: bus_space_unmap(iot, ioh, MPU401_NPORT);
116:
117: return (rc);
118: }
119:
120: int
121: mpu_isa_match(parent, match, aux)
122: struct device *parent;
123: void *match, *aux;
124: {
125: struct isa_attach_args *ia = aux;
126:
127: if (mpu_test(ia->ia_iot, ia->ia_iobase)) {
128: ia->ia_iosize = MPU401_NPORT;
129: return (1);
130: }
131:
132: return (0);
133: }
134:
135: void
136: mpu_isa_attach(parent, self, aux)
137: struct device *parent, *self;
138: void *aux;
139: {
140: struct mpu_isa_softc *sc = (struct mpu_isa_softc *)self;
141: struct isa_attach_args *ia = aux;
142:
143: sc->sc_mpu.iot = ia->ia_iot;
144:
145: if (bus_space_map (ia->ia_iot, ia->ia_iobase, MPU401_NPORT,
146: 0, &sc->sc_mpu.ioh)) {
147: printf(": can`t map i/o space\n");
148: return;
149: }
150:
151: if (!mpu_find(&sc->sc_mpu)) {
152: printf(": find failed\n");
153: return;
154: }
155:
156: printf(": generic MPU-401 compatible\n");
157:
158: midi_attach_mi(&mpu_midi_hw_if, &sc->sc_mpu, &sc->sc_dev);
159: }
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