1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause
3 *
4 * Copyright (c) 2003 Mathew Kanner
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29 #include <sys/param.h>
30 #include <sys/types.h>
31 #include <sys/param.h>
32 #include <sys/queue.h>
33 #include <sys/kernel.h>
34 #include <sys/lock.h>
35 #include <sys/mutex.h>
36 #include <sys/proc.h>
37 #include <sys/systm.h>
38 #include <sys/kobj.h>
39 #include <sys/malloc.h>
40 #include <sys/bus.h> /* to get driver_intr_t */
41
42 #ifdef HAVE_KERNEL_OPTION_HEADERS
43 #include "opt_snd.h"
44 #endif
45
46 #include <dev/sound/midi/mpu401.h>
47 #include <dev/sound/midi/midi.h>
48
49 #include "mpu_if.h"
50 #include "mpufoi_if.h"
51
52 #define MPU_DATAPORT 0
53 #define MPU_CMDPORT 1
54 #define MPU_STATPORT 1
55 #define MPU_RESET 0xff
56 #define MPU_UART 0x3f
57 #define MPU_ACK 0xfe
58 #define MPU_STATMASK 0xc0
59 #define MPU_OUTPUTBUSY 0x40
60 #define MPU_INPUTBUSY 0x80
61 #define MPU_TRYDATA 50
62 #define MPU_DELAY 2500
63
64 #define CMD(m,d) MPUFOI_WRITE(m, m->cookie, MPU_CMDPORT,d)
65 #define STATUS(m) MPUFOI_READ(m, m->cookie, MPU_STATPORT)
66 #define READ(m) MPUFOI_READ(m, m->cookie, MPU_DATAPORT)
67 #define WRITE(m,d) MPUFOI_WRITE(m, m->cookie, MPU_DATAPORT,d)
68
69 struct mpu401 {
70 KOBJ_FIELDS;
71 struct snd_midi *mid;
72 int flags;
73 driver_intr_t *si;
74 void *cookie;
75 struct callout timer;
76 };
77
78 static void mpu401_timeout(void *m);
79 static mpu401_intr_t mpu401_intr;
80
81 static int mpu401_minit(struct snd_midi *, void *);
82 static int mpu401_muninit(struct snd_midi *, void *);
83 static int mpu401_minqsize(struct snd_midi *, void *);
84 static int mpu401_moutqsize(struct snd_midi *, void *);
85 static void mpu401_mcallback(struct snd_midi *, void *, int);
86 static void mpu401_mcallbackp(struct snd_midi *, void *, int);
87
88 static kobj_method_t mpu401_methods[] = {
89 KOBJMETHOD(mpu_init, mpu401_minit),
90 KOBJMETHOD(mpu_uninit, mpu401_muninit),
91 KOBJMETHOD(mpu_inqsize, mpu401_minqsize),
92 KOBJMETHOD(mpu_outqsize, mpu401_moutqsize),
93 KOBJMETHOD(mpu_callback, mpu401_mcallback),
94 KOBJMETHOD(mpu_callbackp, mpu401_mcallbackp),
95 KOBJMETHOD_END
96 };
97
98 DEFINE_CLASS(mpu401, mpu401_methods, 0);
99
100 void
mpu401_timeout(void * a)101 mpu401_timeout(void *a)
102 {
103 struct mpu401 *m = (struct mpu401 *)a;
104
105 if (m->si)
106 (m->si)(m->cookie);
107
108 }
109 static int
mpu401_intr(struct mpu401 * m)110 mpu401_intr(struct mpu401 *m)
111 {
112 #define MPU_INTR_BUF 16
113 uint8_t b[MPU_INTR_BUF];
114 int i;
115 int s;
116
117 #define RXRDY(m) ( (STATUS(m) & MPU_INPUTBUSY) == 0)
118 #define TXRDY(m) ( (STATUS(m) & MPU_OUTPUTBUSY) == 0)
119 i = 0;
120 s = STATUS(m);
121 while ((s & MPU_INPUTBUSY) == 0 && i < MPU_INTR_BUF) {
122 b[i] = READ(m);
123 i++;
124 s = STATUS(m);
125 }
126 if (i)
127 midi_in(m->mid, b, i);
128 i = 0;
129 while (!(s & MPU_OUTPUTBUSY) && i < MPU_INTR_BUF) {
130 if (midi_out(m->mid, b, 1)) {
131
132 WRITE(m, *b);
133 } else {
134 return 0;
135 }
136 i++;
137 /* DELAY(100); */
138 s = STATUS(m);
139 }
140
141 if ((m->flags & M_TXEN) && (m->si)) {
142 callout_reset(&m->timer, 1, mpu401_timeout, m);
143 }
144 return (m->flags & M_TXEN) == M_TXEN;
145 }
146
147 struct mpu401 *
mpu401_init(kobj_class_t cls,void * cookie,driver_intr_t softintr,mpu401_intr_t ** cb)148 mpu401_init(kobj_class_t cls, void *cookie, driver_intr_t softintr,
149 mpu401_intr_t ** cb)
150 {
151 struct mpu401 *m;
152
153 *cb = NULL;
154 m = malloc(sizeof(*m), M_MIDI, M_NOWAIT | M_ZERO);
155
156 if (!m)
157 return NULL;
158
159 kobj_init((kobj_t)m, cls);
160
161 callout_init(&m->timer, 1);
162
163 m->si = softintr;
164 m->cookie = cookie;
165 m->flags = 0;
166
167 m->mid = midi_init(&mpu401_class, 0, 0, m);
168 if (!m->mid)
169 goto err;
170 *cb = mpu401_intr;
171 return m;
172 err:
173 printf("mpu401_init error\n");
174 free(m, M_MIDI);
175 return NULL;
176 }
177
178 int
mpu401_uninit(struct mpu401 * m)179 mpu401_uninit(struct mpu401 *m)
180 {
181 int retval;
182
183 CMD(m, MPU_RESET);
184 retval = midi_uninit(m->mid);
185 if (retval)
186 return retval;
187 free(m, M_MIDI);
188 return 0;
189 }
190
191 static int
mpu401_minit(struct snd_midi * sm,void * arg)192 mpu401_minit(struct snd_midi *sm, void *arg)
193 {
194 struct mpu401 *m = arg;
195 int i;
196
197 CMD(m, MPU_RESET);
198 CMD(m, MPU_UART);
199 return 0;
200 i = 0;
201 while (++i < 2000) {
202 if (RXRDY(m))
203 if (READ(m) == MPU_ACK)
204 break;
205 }
206
207 if (i < 2000) {
208 CMD(m, MPU_UART);
209 return 0;
210 }
211 printf("mpu401_minit failed active sensing\n");
212 return 1;
213 }
214
215 int
mpu401_muninit(struct snd_midi * sm,void * arg)216 mpu401_muninit(struct snd_midi *sm, void *arg)
217 {
218 struct mpu401 *m = arg;
219
220 return MPUFOI_UNINIT(m, m->cookie);
221 }
222
223 int
mpu401_minqsize(struct snd_midi * sm,void * arg)224 mpu401_minqsize(struct snd_midi *sm, void *arg)
225 {
226 return 128;
227 }
228
229 int
mpu401_moutqsize(struct snd_midi * sm,void * arg)230 mpu401_moutqsize(struct snd_midi *sm, void *arg)
231 {
232 return 128;
233 }
234
235 static void
mpu401_mcallback(struct snd_midi * sm,void * arg,int flags)236 mpu401_mcallback(struct snd_midi *sm, void *arg, int flags)
237 {
238 struct mpu401 *m = arg;
239
240 if (flags & M_TXEN && m->si) {
241 callout_reset(&m->timer, 1, mpu401_timeout, m);
242 }
243 m->flags = flags;
244 }
245
246 static void
mpu401_mcallbackp(struct snd_midi * sm,void * arg,int flags)247 mpu401_mcallbackp(struct snd_midi *sm, void *arg, int flags)
248 {
249 mpu401_mcallback(sm, arg, flags);
250 }
251