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 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 118 mpu401_intr(struct mpu401 *m) 119 { 120 #define MPU_INTR_BUF 16 121 MIDI_TYPE 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 * 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 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 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 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 250 mpu401_minqsize(struct snd_midi *sm, void *arg) 251 { 252 return 128; 253 } 254 255 int 256 mpu401_moutqsize(struct snd_midi *sm, void *arg) 257 { 258 return 128; 259 } 260 261 static void 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 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 * 286 mpu401_mdescr(struct snd_midi *sm, void *arg, int verbosity) 287 { 288 289 return "descr mpu401"; 290 } 291 292 static const char * 293 mpu401_mprovider(struct snd_midi *m, void *arg) 294 { 295 return "provider mpu401"; 296 } 297