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 #ifndef KOBJMETHOD_END
53 #define KOBJMETHOD_END { NULL, NULL }
54 #endif
55
56 #define MPU_DATAPORT 0
57 #define MPU_CMDPORT 1
58 #define MPU_STATPORT 1
59 #define MPU_RESET 0xff
60 #define MPU_UART 0x3f
61 #define MPU_ACK 0xfe
62 #define MPU_STATMASK 0xc0
63 #define MPU_OUTPUTBUSY 0x40
64 #define MPU_INPUTBUSY 0x80
65 #define MPU_TRYDATA 50
66 #define MPU_DELAY 2500
67
68 #define CMD(m,d) MPUFOI_WRITE(m, m->cookie, MPU_CMDPORT,d)
69 #define STATUS(m) MPUFOI_READ(m, m->cookie, MPU_STATPORT)
70 #define READ(m) MPUFOI_READ(m, m->cookie, MPU_DATAPORT)
71 #define WRITE(m,d) MPUFOI_WRITE(m, m->cookie, MPU_DATAPORT,d)
72
73 struct mpu401 {
74 KOBJ_FIELDS;
75 struct snd_midi *mid;
76 int flags;
77 driver_intr_t *si;
78 void *cookie;
79 struct callout timer;
80 };
81
82 static void mpu401_timeout(void *m);
83 static mpu401_intr_t mpu401_intr;
84
85 static int mpu401_minit(struct snd_midi *, void *);
86 static int mpu401_muninit(struct snd_midi *, void *);
87 static int mpu401_minqsize(struct snd_midi *, void *);
88 static int mpu401_moutqsize(struct snd_midi *, void *);
89 static void mpu401_mcallback(struct snd_midi *, void *, int);
90 static void mpu401_mcallbackp(struct snd_midi *, void *, int);
91 static const char *mpu401_mdescr(struct snd_midi *, void *, int);
92 static const char *mpu401_mprovider(struct snd_midi *, void *);
93
94 static kobj_method_t mpu401_methods[] = {
95 KOBJMETHOD(mpu_init, mpu401_minit),
96 KOBJMETHOD(mpu_uninit, mpu401_muninit),
97 KOBJMETHOD(mpu_inqsize, mpu401_minqsize),
98 KOBJMETHOD(mpu_outqsize, mpu401_moutqsize),
99 KOBJMETHOD(mpu_callback, mpu401_mcallback),
100 KOBJMETHOD(mpu_callbackp, mpu401_mcallbackp),
101 KOBJMETHOD(mpu_descr, mpu401_mdescr),
102 KOBJMETHOD(mpu_provider, mpu401_mprovider),
103 KOBJMETHOD_END
104 };
105
106 DEFINE_CLASS(mpu401, mpu401_methods, 0);
107
108 void
mpu401_timeout(void * a)109 mpu401_timeout(void *a)
110 {
111 struct mpu401 *m = (struct mpu401 *)a;
112
113 if (m->si)
114 (m->si)(m->cookie);
115
116 }
117 static int
mpu401_intr(struct mpu401 * m)118 mpu401_intr(struct mpu401 *m)
119 {
120 #define MPU_INTR_BUF 16
121 uint8_t b[MPU_INTR_BUF];
122 int i;
123 int s;
124
125 /*
126 printf("mpu401_intr\n");
127 */
128 #define RXRDY(m) ( (STATUS(m) & MPU_INPUTBUSY) == 0)
129 #define TXRDY(m) ( (STATUS(m) & MPU_OUTPUTBUSY) == 0)
130 #if 0
131 #define D(x,l) printf("mpu401_intr %d %x %s %s\n",l, x, x&MPU_INPUTBUSY?"RX":"", x&MPU_OUTPUTBUSY?"TX":"")
132 #else
133 #define D(x,l)
134 #endif
135 i = 0;
136 s = STATUS(m);
137 D(s, 1);
138 while ((s & MPU_INPUTBUSY) == 0 && i < MPU_INTR_BUF) {
139 b[i] = READ(m);
140 /*
141 printf("mpu401_intr in i %d d %d\n", i, b[i]);
142 */
143 i++;
144 s = STATUS(m);
145 }
146 if (i)
147 midi_in(m->mid, b, i);
148 i = 0;
149 while (!(s & MPU_OUTPUTBUSY) && i < MPU_INTR_BUF) {
150 if (midi_out(m->mid, b, 1)) {
151 /*
152 printf("mpu401_intr out i %d d %d\n", i, b[0]);
153 */
154
155 WRITE(m, *b);
156 } else {
157 /*
158 printf("mpu401_intr write: no output\n");
159 */
160 return 0;
161 }
162 i++;
163 /* DELAY(100); */
164 s = STATUS(m);
165 }
166
167 if ((m->flags & M_TXEN) && (m->si)) {
168 callout_reset(&m->timer, 1, mpu401_timeout, m);
169 }
170 return (m->flags & M_TXEN) == M_TXEN;
171 }
172
173 struct mpu401 *
mpu401_init(kobj_class_t cls,void * cookie,driver_intr_t softintr,mpu401_intr_t ** cb)174 mpu401_init(kobj_class_t cls, void *cookie, driver_intr_t softintr,
175 mpu401_intr_t ** cb)
176 {
177 struct mpu401 *m;
178
179 *cb = NULL;
180 m = malloc(sizeof(*m), M_MIDI, M_NOWAIT | M_ZERO);
181
182 if (!m)
183 return NULL;
184
185 kobj_init((kobj_t)m, cls);
186
187 callout_init(&m->timer, 1);
188
189 m->si = softintr;
190 m->cookie = cookie;
191 m->flags = 0;
192
193 m->mid = midi_init(&mpu401_class, 0, 0, m);
194 if (!m->mid)
195 goto err;
196 *cb = mpu401_intr;
197 return m;
198 err:
199 printf("mpu401_init error\n");
200 free(m, M_MIDI);
201 return NULL;
202 }
203
204 int
mpu401_uninit(struct mpu401 * m)205 mpu401_uninit(struct mpu401 *m)
206 {
207 int retval;
208
209 CMD(m, MPU_RESET);
210 retval = midi_uninit(m->mid);
211 if (retval)
212 return retval;
213 free(m, M_MIDI);
214 return 0;
215 }
216
217 static int
mpu401_minit(struct snd_midi * sm,void * arg)218 mpu401_minit(struct snd_midi *sm, void *arg)
219 {
220 struct mpu401 *m = arg;
221 int i;
222
223 CMD(m, MPU_RESET);
224 CMD(m, MPU_UART);
225 return 0;
226 i = 0;
227 while (++i < 2000) {
228 if (RXRDY(m))
229 if (READ(m) == MPU_ACK)
230 break;
231 }
232
233 if (i < 2000) {
234 CMD(m, MPU_UART);
235 return 0;
236 }
237 printf("mpu401_minit failed active sensing\n");
238 return 1;
239 }
240
241 int
mpu401_muninit(struct snd_midi * sm,void * arg)242 mpu401_muninit(struct snd_midi *sm, void *arg)
243 {
244 struct mpu401 *m = arg;
245
246 return MPUFOI_UNINIT(m, m->cookie);
247 }
248
249 int
mpu401_minqsize(struct snd_midi * sm,void * arg)250 mpu401_minqsize(struct snd_midi *sm, void *arg)
251 {
252 return 128;
253 }
254
255 int
mpu401_moutqsize(struct snd_midi * sm,void * arg)256 mpu401_moutqsize(struct snd_midi *sm, void *arg)
257 {
258 return 128;
259 }
260
261 static void
mpu401_mcallback(struct snd_midi * sm,void * arg,int flags)262 mpu401_mcallback(struct snd_midi *sm, void *arg, int flags)
263 {
264 struct mpu401 *m = arg;
265 #if 0
266 printf("mpu401_callback %s %s %s %s\n",
267 flags & M_RX ? "M_RX" : "",
268 flags & M_TX ? "M_TX" : "",
269 flags & M_RXEN ? "M_RXEN" : "",
270 flags & M_TXEN ? "M_TXEN" : "");
271 #endif
272 if (flags & M_TXEN && m->si) {
273 callout_reset(&m->timer, 1, mpu401_timeout, m);
274 }
275 m->flags = flags;
276 }
277
278 static void
mpu401_mcallbackp(struct snd_midi * sm,void * arg,int flags)279 mpu401_mcallbackp(struct snd_midi *sm, void *arg, int flags)
280 {
281 /* printf("mpu401_callbackp\n"); */
282 mpu401_mcallback(sm, arg, flags);
283 }
284
285 static const char *
mpu401_mdescr(struct snd_midi * sm,void * arg,int verbosity)286 mpu401_mdescr(struct snd_midi *sm, void *arg, int verbosity)
287 {
288
289 return "descr mpu401";
290 }
291
292 static const char *
mpu401_mprovider(struct snd_midi * m,void * arg)293 mpu401_mprovider(struct snd_midi *m, void *arg)
294 {
295 return "provider mpu401";
296 }
297