1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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/cdefs.h>
30 __FBSDID("$FreeBSD: releng/12.0/sys/dev/sound/midi/mpu401.c 326255 2017-11-27 14:52:40Z pfg $");
31
32 #include <sys/param.h>
33 #include <sys/types.h>
34 #include <sys/param.h>
35 #include <sys/queue.h>
36 #include <sys/kernel.h>
37 #include <sys/lock.h>
38 #include <sys/mutex.h>
39 #include <sys/proc.h>
40 #include <sys/systm.h>
41 #include <sys/kobj.h>
42 #include <sys/malloc.h>
43 #include <sys/bus.h> /* to get driver_intr_t */
44
45 #ifdef HAVE_KERNEL_OPTION_HEADERS
46 #include "opt_snd.h"
47 #endif
48
49 #include <dev/sound/midi/mpu401.h>
50 #include <dev/sound/midi/midi.h>
51
52 #include "mpu_if.h"
53 #include "mpufoi_if.h"
54
55 #ifndef KOBJMETHOD_END
56 #define KOBJMETHOD_END { NULL, NULL }
57 #endif
58
59 #define MPU_DATAPORT 0
60 #define MPU_CMDPORT 1
61 #define MPU_STATPORT 1
62 #define MPU_RESET 0xff
63 #define MPU_UART 0x3f
64 #define MPU_ACK 0xfe
65 #define MPU_STATMASK 0xc0
66 #define MPU_OUTPUTBUSY 0x40
67 #define MPU_INPUTBUSY 0x80
68 #define MPU_TRYDATA 50
69 #define MPU_DELAY 2500
70
71 #define CMD(m,d) MPUFOI_WRITE(m, m->cookie, MPU_CMDPORT,d)
72 #define STATUS(m) MPUFOI_READ(m, m->cookie, MPU_STATPORT)
73 #define READ(m) MPUFOI_READ(m, m->cookie, MPU_DATAPORT)
74 #define WRITE(m,d) MPUFOI_WRITE(m, m->cookie, MPU_DATAPORT,d)
75
76 struct mpu401 {
77 KOBJ_FIELDS;
78 struct snd_midi *mid;
79 int flags;
80 driver_intr_t *si;
81 void *cookie;
82 struct callout timer;
83 };
84
85 static void mpu401_timeout(void *m);
86 static mpu401_intr_t mpu401_intr;
87
88 static int mpu401_minit(struct snd_midi *, void *);
89 static int mpu401_muninit(struct snd_midi *, void *);
90 static int mpu401_minqsize(struct snd_midi *, void *);
91 static int mpu401_moutqsize(struct snd_midi *, void *);
92 static void mpu401_mcallback(struct snd_midi *, void *, int);
93 static void mpu401_mcallbackp(struct snd_midi *, void *, int);
94 static const char *mpu401_mdescr(struct snd_midi *, void *, int);
95 static const char *mpu401_mprovider(struct snd_midi *, void *);
96
97 static kobj_method_t mpu401_methods[] = {
98 KOBJMETHOD(mpu_init, mpu401_minit),
99 KOBJMETHOD(mpu_uninit, mpu401_muninit),
100 KOBJMETHOD(mpu_inqsize, mpu401_minqsize),
101 KOBJMETHOD(mpu_outqsize, mpu401_moutqsize),
102 KOBJMETHOD(mpu_callback, mpu401_mcallback),
103 KOBJMETHOD(mpu_callbackp, mpu401_mcallbackp),
104 KOBJMETHOD(mpu_descr, mpu401_mdescr),
105 KOBJMETHOD(mpu_provider, mpu401_mprovider),
106 KOBJMETHOD_END
107 };
108
109 DEFINE_CLASS(mpu401, mpu401_methods, 0);
110
111 void
112 mpu401_timeout(void *a)
113 {
114 struct mpu401 *m = (struct mpu401 *)a;
115
116 if (m->si)
117 (m->si)(m->cookie);
118
119 }
120 static int
121 mpu401_intr(struct mpu401 *m)
122 {
123 #define MPU_INTR_BUF 16
124 MIDI_TYPE b[MPU_INTR_BUF];
125 int i;
126 int s;
127
128 /*
129 printf("mpu401_intr\n");
130 */
131 #define RXRDY(m) ( (STATUS(m) & MPU_INPUTBUSY) == 0)
132 #define TXRDY(m) ( (STATUS(m) & MPU_OUTPUTBUSY) == 0)
133 #if 0
134 #define D(x,l) printf("mpu401_intr %d %x %s %s\n",l, x, x&MPU_INPUTBUSY?"RX":"", x&MPU_OUTPUTBUSY?"TX":"")
135 #else
136 #define D(x,l)
137 #endif
138 i = 0;
139 s = STATUS(m);
140 D(s, 1);
141 while ((s & MPU_INPUTBUSY) == 0 && i < MPU_INTR_BUF) {
142 b[i] = READ(m);
143 /*
144 printf("mpu401_intr in i %d d %d\n", i, b[i]);
145 */
146 i++;
147 s = STATUS(m);
148 }
149 if (i)
150 midi_in(m->mid, b, i);
151 i = 0;
152 while (!(s & MPU_OUTPUTBUSY) && i < MPU_INTR_BUF) {
153 if (midi_out(m->mid, b, 1)) {
154 /*
155 printf("mpu401_intr out i %d d %d\n", i, b[0]);
156 */
157
158 WRITE(m, *b);
159 } else {
160 /*
161 printf("mpu401_intr write: no output\n");
162 */
163 return 0;
164 }
165 i++;
166 /* DELAY(100); */
167 s = STATUS(m);
168 }
169
170 if ((m->flags & M_TXEN) && (m->si)) {
171 callout_reset(&m->timer, 1, mpu401_timeout, m);
172 }
173 return (m->flags & M_TXEN) == M_TXEN;
174 }
175
176 struct mpu401 *
177 mpu401_init(kobj_class_t cls, void *cookie, driver_intr_t softintr,
178 mpu401_intr_t ** cb)
179 {
180 struct mpu401 *m;
181
182 *cb = NULL;
183 m = malloc(sizeof(*m), M_MIDI, M_NOWAIT | M_ZERO);
184
185 if (!m)
186 return NULL;
187
188 kobj_init((kobj_t)m, cls);
189
190 callout_init(&m->timer, 1);
191
192 m->si = softintr;
193 m->cookie = cookie;
194 m->flags = 0;
195
196 m->mid = midi_init(&mpu401_class, 0, 0, m);
197 if (!m->mid)
198 goto err;
199 *cb = mpu401_intr;
200 return m;
201 err:
202 printf("mpu401_init error\n");
203 free(m, M_MIDI);
204 return NULL;
205 }
206
207 int
208 mpu401_uninit(struct mpu401 *m)
209 {
210 int retval;
211
212 CMD(m, MPU_RESET);
213 retval = midi_uninit(m->mid);
214 if (retval)
215 return retval;
216 free(m, M_MIDI);
217 return 0;
218 }
219
220 static int
221 mpu401_minit(struct snd_midi *sm, void *arg)
222 {
223 struct mpu401 *m = arg;
224 int i;
225
226 CMD(m, MPU_RESET);
227 CMD(m, MPU_UART);
228 return 0;
229 i = 0;
230 while (++i < 2000) {
231 if (RXRDY(m))
232 if (READ(m) == MPU_ACK)
233 break;
234 }
235
236 if (i < 2000) {
237 CMD(m, MPU_UART);
238 return 0;
239 }
240 printf("mpu401_minit failed active sensing\n");
241 return 1;
242 }
243
244
245 int
246 mpu401_muninit(struct snd_midi *sm, void *arg)
247 {
248 struct mpu401 *m = arg;
249
250 return MPUFOI_UNINIT(m, m->cookie);
251 }
252
253 int
254 mpu401_minqsize(struct snd_midi *sm, void *arg)
255 {
256 return 128;
257 }
258
259 int
260 mpu401_moutqsize(struct snd_midi *sm, void *arg)
261 {
262 return 128;
263 }
264
265 static void
266 mpu401_mcallback(struct snd_midi *sm, void *arg, int flags)
267 {
268 struct mpu401 *m = arg;
269 #if 0
270 printf("mpu401_callback %s %s %s %s\n",
271 flags & M_RX ? "M_RX" : "",
272 flags & M_TX ? "M_TX" : "",
273 flags & M_RXEN ? "M_RXEN" : "",
274 flags & M_TXEN ? "M_TXEN" : "");
275 #endif
276 if (flags & M_TXEN && m->si) {
277 callout_reset(&m->timer, 1, mpu401_timeout, m);
278 }
279 m->flags = flags;
280 }
281
282 static void
283 mpu401_mcallbackp(struct snd_midi *sm, void *arg, int flags)
284 {
285 /* printf("mpu401_callbackp\n"); */
286 mpu401_mcallback(sm, arg, flags);
287 }
288
289 static const char *
290 mpu401_mdescr(struct snd_midi *sm, void *arg, int verbosity)
291 {
292
293 return "descr mpu401";
294 }
295
296 static const char *
297 mpu401_mprovider(struct snd_midi *m, void *arg)
298 {
299 return "provider mpu401";
300 }
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