1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
|
/* $OpenBSD: mpu401.c,v 1.4 1999/08/05 05:32:40 deraadt Exp $ */
/* $NetBSD: mpu401.c,v 1.3 1998/11/25 22:17:06 augustss Exp $ */
/*
* Copyright (c) 1998 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Lennart Augustsson (augustss@netbsd.org).
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the NetBSD
* Foundation, Inc. and its contributors.
* 4. Neither the name of The NetBSD Foundation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/errno.h>
#include <sys/ioctl.h>
#include <sys/syslog.h>
#include <sys/device.h>
#include <sys/proc.h>
#include <sys/buf.h>
#include <vm/vm.h>
#include <machine/cpu.h>
#include <machine/intr.h>
#include <machine/bus.h>
#include <dev/midi_if.h>
#include <dev/isa/isavar.h>
#include <dev/isa/isadmavar.h>
#include <dev/ic/mpuvar.h>
#ifndef splaudio
#define splaudio() splbio() /* XXX found in audio_if.h normally */
#endif
#ifdef AUDIO_DEBUG
#define DPRINTF(x) if (mpu401debug) printf x
#define DPRINTFN(n,x) if (mpu401debug >= (n)) printf x
int mpu401debug = 0;
#else
#define DPRINTF(x)
#define DPRINTFN(n,x)
#endif
#define MPU401_NPORT 2
#define MPU_DATA 0
#define MPU_COMMAND 1
#define MPU_RESET 0xff
#define MPU_UART_MODE 0x3f
#define MPU_ACK 0xfe
#define MPU_STATUS 1
#define MPU_OUTPUT_BUSY 0x40
#define MPU_INPUT_EMPTY 0x80
#define MPU_MAXWAIT 10000 /* usec/10 to wait */
#define MPU_GETSTATUS(iot, ioh) (bus_space_read_1(iot, ioh, MPU_STATUS))
int mpu_reset(struct mpu_softc *);
static __inline int mpu_waitready(struct mpu_softc *);
void mpu_readinput(struct mpu_softc *);
struct midi_hw_if mpu_midi_hw_if = {
mpu_open,
mpu_close,
mpu_output,
mpu_getinfo,
0, /* ioctl */
};
int
mpu_find(v)
void *v;
{
struct mpu_softc *sc = v;
if (MPU_GETSTATUS(sc->iot, sc->ioh) == 0xff) {
DPRINTF(("mpu_find: No status\n"));
goto bad;
}
sc->open = 0;
sc->intr = 0;
if (mpu_reset(sc) == 0)
return 1;
bad:
return 0;
}
static __inline int
mpu_waitready(sc)
struct mpu_softc *sc;
{
int i;
for(i = 0; i < MPU_MAXWAIT; i++) {
if (!(MPU_GETSTATUS(sc->iot, sc->ioh) & MPU_OUTPUT_BUSY))
return 0;
delay(10);
}
return 1;
}
int
mpu_reset(sc)
struct mpu_softc *sc;
{
bus_space_tag_t iot = sc->iot;
bus_space_handle_t ioh = sc->ioh;
int i;
int s;
if (mpu_waitready(sc)) {
DPRINTF(("mpu_reset: not ready\n"));
return EIO;
}
s = splaudio(); /* Don't let the interrupt get our ACK. */
bus_space_write_1(iot, ioh, MPU_COMMAND, MPU_RESET);
for(i = 0; i < 2*MPU_MAXWAIT; i++) {
if (!(MPU_GETSTATUS(iot, ioh) & MPU_INPUT_EMPTY) &&
bus_space_read_1(iot, ioh, MPU_DATA) == MPU_ACK) {
splx(s);
return 0;
}
}
splx(s);
DPRINTF(("mpu_reset: No ACK\n"));
return EIO;
}
int
mpu_open(v, flags, iintr, ointr, arg)
void *v;
int flags;
void (*iintr)__P((void *, int));
void (*ointr)__P((void *));
void *arg;
{
struct mpu_softc *sc = v;
DPRINTF(("mpu_open: sc=%p\n", sc));
if (sc->open)
return EBUSY;
if (mpu_reset(sc) != 0)
return EIO;
bus_space_write_1(sc->iot, sc->ioh, MPU_COMMAND, MPU_UART_MODE);
sc->open = 1;
sc->intr = iintr;
sc->arg = arg;
return 0;
}
void
mpu_close(v)
void *v;
{
struct mpu_softc *sc = v;
DPRINTF(("mpu_close: sc=%p\n", sc));
sc->open = 0;
sc->intr = 0;
mpu_reset(sc); /* exit UART mode */
}
void
mpu_readinput(sc)
struct mpu_softc *sc;
{
bus_space_tag_t iot = sc->iot;
bus_space_handle_t ioh = sc->ioh;
int data;
while(!(MPU_GETSTATUS(iot, ioh) & MPU_INPUT_EMPTY)) {
data = bus_space_read_1(iot, ioh, MPU_DATA);
DPRINTFN(3, ("mpu_rea: sc=%p 0x%02x\n", sc, data));
if (sc->intr)
sc->intr(sc->arg, data);
}
}
int
mpu_output(v, d)
void *v;
int d;
{
struct mpu_softc *sc = v;
int s;
DPRINTFN(3, ("mpu_output: sc=%p 0x%02x\n", sc, d));
if (!(MPU_GETSTATUS(sc->iot, sc->ioh) & MPU_INPUT_EMPTY)) {
s = splaudio();
mpu_readinput(sc);
splx(s);
}
if (mpu_waitready(sc)) {
DPRINTF(("mpu_output: not ready\n"));
return EIO;
}
bus_space_write_1(sc->iot, sc->ioh, MPU_DATA, d);
return 0;
}
void
mpu_getinfo(addr, mi)
void *addr;
struct midi_info *mi;
{
mi->name = "MPU-401 MIDI UART";
mi->props = 0;
}
int
mpu_intr(v)
void *v;
{
struct mpu_softc *sc = v;
if (MPU_GETSTATUS(sc->iot, sc->ioh) & MPU_INPUT_EMPTY) {
DPRINTF(("mpu_intr: no data\n"));
return 0;
}
mpu_readinput(sc);
return 1;
}
|
