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 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 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 * 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 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 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 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 217 mpu401_minqsize(struct snd_midi *sm, void *arg) 218 { 219 return 128; 220 } 221 222 int 223 mpu401_moutqsize(struct snd_midi *sm, void *arg) 224 { 225 return 128; 226 } 227 228 static void 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 240 mpu401_mcallbackp(struct snd_midi *sm, void *arg, int flags) 241 { 242 mpu401_mcallback(sm, arg, flags); 243 } 244