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/systm.h>
31 #include <sys/bus.h>
32 #include <sys/kernel.h>
33 #include <sys/kobj.h>
34
35 #ifdef HAVE_KERNEL_OPTION_HEADERS
36 #include "opt_snd.h"
37 #endif
38
39 #include <dev/sound/midi/mpu401.h>
40 #include <dev/sound/midi/midi.h>
41
42 #include "mpu_if.h"
43 #include "mpufoi_if.h"
44
45 #define MPU_DATAPORT 0
46 #define MPU_CMDPORT 1
47 #define MPU_STATPORT 1
48 #define MPU_RESET 0xff
49 #define MPU_UART 0x3f
50 #define MPU_ACK 0xfe
51 #define MPU_STATMASK 0xc0
52 #define MPU_OUTPUTBUSY 0x40
53 #define MPU_INPUTBUSY 0x80
54 #define MPU_TRYDATA 50
55 #define MPU_DELAY 2500
56
57 #define CMD(m,d) MPUFOI_WRITE(m, m->cookie, MPU_CMDPORT,d)
58 #define STATUS(m) MPUFOI_READ(m, m->cookie, MPU_STATPORT)
59 #define READ(m) MPUFOI_READ(m, m->cookie, MPU_DATAPORT)
60 #define WRITE(m,d) MPUFOI_WRITE(m, m->cookie, MPU_DATAPORT,d)
61
62 struct mpu401 {
63 KOBJ_FIELDS;
64 struct snd_midi *mid;
65 int flags;
66 driver_intr_t *si;
67 void *cookie;
68 struct callout timer;
69 };
70
71 static void mpu401_timeout(void *m);
72 static mpu401_intr_t mpu401_intr;
73
74 static int mpu401_minit(struct snd_midi *, void *);
75 static int mpu401_muninit(struct snd_midi *, void *);
76 static int mpu401_minqsize(struct snd_midi *, void *);
77 static int mpu401_moutqsize(struct snd_midi *, void *);
78 static void mpu401_mcallback(struct snd_midi *, void *, int);
79 static void mpu401_mcallbackp(struct snd_midi *, void *, int);
80
81 static kobj_method_t mpu401_methods[] = {
82 KOBJMETHOD(mpu_init, mpu401_minit),
83 KOBJMETHOD(mpu_uninit, mpu401_muninit),
84 KOBJMETHOD(mpu_inqsize, mpu401_minqsize),
85 KOBJMETHOD(mpu_outqsize, mpu401_moutqsize),
86 KOBJMETHOD(mpu_callback, mpu401_mcallback),
87 KOBJMETHOD(mpu_callbackp, mpu401_mcallbackp),
88 KOBJMETHOD_END
89 };
90
91 DEFINE_CLASS(mpu401, mpu401_methods, 0);
92
93 void
mpu401_timeout(void * a)94 mpu401_timeout(void *a)
95 {
96 struct mpu401 *m = (struct mpu401 *)a;
97
98 if (m->si)
99 (m->si)(m->cookie);
100
101 }
102 static int
mpu401_intr(struct mpu401 * m)103 mpu401_intr(struct mpu401 *m)
104 {
105 #define MPU_INTR_BUF 16
106 uint8_t b[MPU_INTR_BUF];
107 int i;
108 int s;
109
110 #define RXRDY(m) ( (STATUS(m) & MPU_INPUTBUSY) == 0)
111 #define TXRDY(m) ( (STATUS(m) & MPU_OUTPUTBUSY) == 0)
112 i = 0;
113 s = STATUS(m);
114 while ((s & MPU_INPUTBUSY) == 0 && i < MPU_INTR_BUF) {
115 b[i] = READ(m);
116 i++;
117 s = STATUS(m);
118 }
119 if (i)
120 midi_in(m->mid, b, i);
121 i = 0;
122 while (!(s & MPU_OUTPUTBUSY) && i < MPU_INTR_BUF) {
123 if (midi_out(m->mid, b, 1)) {
124
125 WRITE(m, *b);
126 } else {
127 return 0;
128 }
129 i++;
130 /* DELAY(100); */
131 s = STATUS(m);
132 }
133
134 if ((m->flags & M_TXEN) && (m->si)) {
135 callout_reset(&m->timer, 1, mpu401_timeout, m);
136 }
137 return (m->flags & M_TXEN) == M_TXEN;
138 }
139
140 struct mpu401 *
mpu401_init(kobj_class_t cls,void * cookie,driver_intr_t softintr,mpu401_intr_t ** cb)141 mpu401_init(kobj_class_t cls, void *cookie, driver_intr_t softintr,
142 mpu401_intr_t ** cb)
143 {
144 struct mpu401 *m;
145
146 *cb = NULL;
147 m = malloc(sizeof(*m), M_MIDI, M_NOWAIT | M_ZERO);
148
149 if (!m)
150 return NULL;
151
152 kobj_init((kobj_t)m, cls);
153
154 callout_init(&m->timer, 1);
155
156 m->si = softintr;
157 m->cookie = cookie;
158 m->flags = 0;
159
160 m->mid = midi_init(&mpu401_class, 0, 0, m);
161 if (!m->mid)
162 goto err;
163 *cb = mpu401_intr;
164 return m;
165 err:
166 printf("mpu401_init error\n");
167 free(m, M_MIDI);
168 return NULL;
169 }
170
171 int
mpu401_uninit(struct mpu401 * m)172 mpu401_uninit(struct mpu401 *m)
173 {
174 int retval;
175
176 CMD(m, MPU_RESET);
177 retval = midi_uninit(m->mid);
178 if (retval)
179 return retval;
180 free(m, M_MIDI);
181 return 0;
182 }
183
184 static int
mpu401_minit(struct snd_midi * sm,void * arg)185 mpu401_minit(struct snd_midi *sm, void *arg)
186 {
187 struct mpu401 *m = arg;
188 int i;
189
190 CMD(m, MPU_RESET);
191 CMD(m, MPU_UART);
192 return 0;
193 i = 0;
194 while (++i < 2000) {
195 if (RXRDY(m))
196 if (READ(m) == MPU_ACK)
197 break;
198 }
199
200 if (i < 2000) {
201 CMD(m, MPU_UART);
202 return 0;
203 }
204 printf("mpu401_minit failed active sensing\n");
205 return 1;
206 }
207
208 int
mpu401_muninit(struct snd_midi * sm,void * arg)209 mpu401_muninit(struct snd_midi *sm, void *arg)
210 {
211 struct mpu401 *m = arg;
212
213 return MPUFOI_UNINIT(m, m->cookie);
214 }
215
216 int
mpu401_minqsize(struct snd_midi * sm,void * arg)217 mpu401_minqsize(struct snd_midi *sm, void *arg)
218 {
219 return 128;
220 }
221
222 int
mpu401_moutqsize(struct snd_midi * sm,void * arg)223 mpu401_moutqsize(struct snd_midi *sm, void *arg)
224 {
225 return 128;
226 }
227
228 static void
mpu401_mcallback(struct snd_midi * sm,void * arg,int flags)229 mpu401_mcallback(struct snd_midi *sm, void *arg, int flags)
230 {
231 struct mpu401 *m = arg;
232
233 if (flags & M_TXEN && m->si) {
234 callout_reset(&m->timer, 1, mpu401_timeout, m);
235 }
236 m->flags = flags;
237 }
238
239 static void
mpu401_mcallbackp(struct snd_midi * sm,void * arg,int flags)240 mpu401_mcallbackp(struct snd_midi *sm, void *arg, int flags)
241 {
242 mpu401_mcallback(sm, arg, flags);
243 }
244