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
92 static kobj_method_t mpu401_methods[] = {
93 KOBJMETHOD(mpu_init, mpu401_minit),
94 KOBJMETHOD(mpu_uninit, mpu401_muninit),
95 KOBJMETHOD(mpu_inqsize, mpu401_minqsize),
96 KOBJMETHOD(mpu_outqsize, mpu401_moutqsize),
97 KOBJMETHOD(mpu_callback, mpu401_mcallback),
98 KOBJMETHOD(mpu_callbackp, mpu401_mcallbackp),
99 KOBJMETHOD_END
100 };
101
102 DEFINE_CLASS(mpu401, mpu401_methods, 0);
103
104 void
mpu401_timeout(void * a)105 mpu401_timeout(void *a)
106 {
107 struct mpu401 *m = (struct mpu401 *)a;
108
109 if (m->si)
110 (m->si)(m->cookie);
111
112 }
113 static int
mpu401_intr(struct mpu401 * m)114 mpu401_intr(struct mpu401 *m)
115 {
116 #define MPU_INTR_BUF 16
117 uint8_t b[MPU_INTR_BUF];
118 int i;
119 int s;
120
121 #define RXRDY(m) ( (STATUS(m) & MPU_INPUTBUSY) == 0)
122 #define TXRDY(m) ( (STATUS(m) & MPU_OUTPUTBUSY) == 0)
123 i = 0;
124 s = STATUS(m);
125 while ((s & MPU_INPUTBUSY) == 0 && i < MPU_INTR_BUF) {
126 b[i] = READ(m);
127 i++;
128 s = STATUS(m);
129 }
130 if (i)
131 midi_in(m->mid, b, i);
132 i = 0;
133 while (!(s & MPU_OUTPUTBUSY) && i < MPU_INTR_BUF) {
134 if (midi_out(m->mid, b, 1)) {
135
136 WRITE(m, *b);
137 } else {
138 return 0;
139 }
140 i++;
141 /* DELAY(100); */
142 s = STATUS(m);
143 }
144
145 if ((m->flags & M_TXEN) && (m->si)) {
146 callout_reset(&m->timer, 1, mpu401_timeout, m);
147 }
148 return (m->flags & M_TXEN) == M_TXEN;
149 }
150
151 struct mpu401 *
mpu401_init(kobj_class_t cls,void * cookie,driver_intr_t softintr,mpu401_intr_t ** cb)152 mpu401_init(kobj_class_t cls, void *cookie, driver_intr_t softintr,
153 mpu401_intr_t ** cb)
154 {
155 struct mpu401 *m;
156
157 *cb = NULL;
158 m = malloc(sizeof(*m), M_MIDI, M_NOWAIT | M_ZERO);
159
160 if (!m)
161 return NULL;
162
163 kobj_init((kobj_t)m, cls);
164
165 callout_init(&m->timer, 1);
166
167 m->si = softintr;
168 m->cookie = cookie;
169 m->flags = 0;
170
171 m->mid = midi_init(&mpu401_class, 0, 0, m);
172 if (!m->mid)
173 goto err;
174 *cb = mpu401_intr;
175 return m;
176 err:
177 printf("mpu401_init error\n");
178 free(m, M_MIDI);
179 return NULL;
180 }
181
182 int
mpu401_uninit(struct mpu401 * m)183 mpu401_uninit(struct mpu401 *m)
184 {
185 int retval;
186
187 CMD(m, MPU_RESET);
188 retval = midi_uninit(m->mid);
189 if (retval)
190 return retval;
191 free(m, M_MIDI);
192 return 0;
193 }
194
195 static int
mpu401_minit(struct snd_midi * sm,void * arg)196 mpu401_minit(struct snd_midi *sm, void *arg)
197 {
198 struct mpu401 *m = arg;
199 int i;
200
201 CMD(m, MPU_RESET);
202 CMD(m, MPU_UART);
203 return 0;
204 i = 0;
205 while (++i < 2000) {
206 if (RXRDY(m))
207 if (READ(m) == MPU_ACK)
208 break;
209 }
210
211 if (i < 2000) {
212 CMD(m, MPU_UART);
213 return 0;
214 }
215 printf("mpu401_minit failed active sensing\n");
216 return 1;
217 }
218
219 int
mpu401_muninit(struct snd_midi * sm,void * arg)220 mpu401_muninit(struct snd_midi *sm, void *arg)
221 {
222 struct mpu401 *m = arg;
223
224 return MPUFOI_UNINIT(m, m->cookie);
225 }
226
227 int
mpu401_minqsize(struct snd_midi * sm,void * arg)228 mpu401_minqsize(struct snd_midi *sm, void *arg)
229 {
230 return 128;
231 }
232
233 int
mpu401_moutqsize(struct snd_midi * sm,void * arg)234 mpu401_moutqsize(struct snd_midi *sm, void *arg)
235 {
236 return 128;
237 }
238
239 static void
mpu401_mcallback(struct snd_midi * sm,void * arg,int flags)240 mpu401_mcallback(struct snd_midi *sm, void *arg, int flags)
241 {
242 struct mpu401 *m = arg;
243
244 if (flags & M_TXEN && m->si) {
245 callout_reset(&m->timer, 1, mpu401_timeout, m);
246 }
247 m->flags = flags;
248 }
249
250 static void
mpu401_mcallbackp(struct snd_midi * sm,void * arg,int flags)251 mpu401_mcallbackp(struct snd_midi *sm, void *arg, int flags)
252 {
253 mpu401_mcallback(sm, arg, flags);
254 }
255