1 /* $OpenBSD: mpu_isa.c,v 1.6 2015/03/14 03:38:47 jsg Exp $ */ 2 3 /* 4 * Copyright (c) 2002 Sergey Smitienko. All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. The name of the author may not be used to endorse or promote products 15 * derived from this software without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 20 * IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 21 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 22 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 23 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 25 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 26 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED 27 * OF THE POSSIBILITY OF SUCH DAMAGE. 28 */ 29 30 #include <sys/param.h> 31 #include <sys/systm.h> 32 #include <sys/errno.h> 33 #include <sys/ioctl.h> 34 #include <sys/syslog.h> 35 #include <sys/device.h> 36 37 #include <machine/bus.h> 38 39 #include <sys/audioio.h> 40 #include <dev/midi_if.h> 41 42 #include <dev/isa/isavar.h> 43 #include <dev/isa/isadmavar.h> 44 45 #include <dev/ic/mpuvar.h> 46 47 int mpu_isa_match(struct device *, void *, void *); 48 void mpu_isa_attach(struct device *, struct device *, void *); 49 int mpu_test(bus_space_tag_t, int); 50 51 #ifdef AUDIO_DEBUG 52 #define DPRINTF(x) if (mpu_debug) printf x 53 int mpu_debug = 0; 54 #else 55 #define DPRINTF(x) 56 #endif 57 58 #define MPU_GETSTATUS(iot, ioh) (bus_space_read_1(iot, ioh, MPU_STATUS)) 59 60 struct mpu_isa_softc { 61 struct device sc_dev; 62 63 struct mpu_softc sc_mpu; 64 }; 65 66 struct cfattach mpu_isa_ca = { 67 sizeof(struct mpu_isa_softc), mpu_isa_match, mpu_isa_attach 68 }; 69 70 int 71 mpu_test (iot, iobase) 72 bus_space_tag_t iot; 73 int iobase; /* base port number to try */ 74 { 75 bus_space_handle_t ioh; 76 int i, rc; 77 78 rc = 0; 79 if (bus_space_map(iot, iobase, MPU401_NPORT, 0, &ioh)) { 80 DPRINTF(("mpu_test: can't map: %x/2\n", iobase)); 81 return (0); 82 } 83 84 DPRINTF(("mpu_test: trying: %x\n", iobase)); 85 86 /* 87 * The following code is a shameless copy of mpu401.c 88 * it is here until a redesign of mpu_find() interface 89 */ 90 91 if (MPU_GETSTATUS(iot, ioh) == 0xff) 92 goto done; 93 94 for (i = 0; i < MPU_MAXWAIT; i++) { 95 if (!(MPU_GETSTATUS(iot, ioh) & MPU_OUTPUT_BUSY)) { 96 rc = 1; 97 break; 98 } 99 delay (10); 100 } 101 102 if (rc == 1) { 103 bus_space_write_1(iot, ioh, MPU_COMMAND, MPU_RESET); 104 rc = 0; 105 for (i = 0; i < 2 * MPU_MAXWAIT; i++) 106 if (!(MPU_GETSTATUS(iot, ioh) & MPU_INPUT_EMPTY) && 107 bus_space_read_1(iot, ioh, MPU_DATA) == MPU_ACK) { 108 rc = 1; 109 break; 110 } 111 } 112 done: 113 bus_space_unmap(iot, ioh, MPU401_NPORT); 114 115 return (rc); 116 } 117 118 int 119 mpu_isa_match(parent, match, aux) 120 struct device *parent; 121 void *match, *aux; 122 { 123 struct isa_attach_args *ia = aux; 124 125 if (mpu_test(ia->ia_iot, ia->ia_iobase)) { 126 ia->ia_iosize = MPU401_NPORT; 127 return (1); 128 } 129 130 return (0); 131 } 132 133 void 134 mpu_isa_attach(parent, self, aux) 135 struct device *parent, *self; 136 void *aux; 137 { 138 struct mpu_isa_softc *sc = (struct mpu_isa_softc *)self; 139 struct isa_attach_args *ia = aux; 140 141 sc->sc_mpu.iot = ia->ia_iot; 142 143 if (bus_space_map (ia->ia_iot, ia->ia_iobase, MPU401_NPORT, 144 0, &sc->sc_mpu.ioh)) { 145 printf(": can't map i/o space\n"); 146 return; 147 } 148 149 if (!mpu_find(&sc->sc_mpu)) { 150 printf(": find failed\n"); 151 return; 152 } 153 154 printf(": generic MPU-401 compatible\n"); 155 156 midi_attach_mi(&mpu_midi_hw_if, &sc->sc_mpu, &sc->sc_dev); 157 } 158