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 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 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 * 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 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 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 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 228 mpu401_minqsize(struct snd_midi *sm, void *arg) 229 { 230 return 128; 231 } 232 233 int 234 mpu401_moutqsize(struct snd_midi *sm, void *arg) 235 { 236 return 128; 237 } 238 239 static void 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 251 mpu401_mcallbackp(struct snd_midi *sm, void *arg, int flags) 252 { 253 mpu401_mcallback(sm, arg, flags); 254 } 255