1 /* $OpenBSD: mpu_isa.c,v 1.4 2009/03/29 21:53:52 sthen 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 #include <sys/proc.h> 37 38 #include <machine/bus.h> 39 40 #include <sys/audioio.h> 41 #include <dev/audio_if.h> 42 #include <dev/midi_if.h> 43 44 #include <dev/isa/isavar.h> 45 #include <dev/isa/isadmavar.h> 46 47 #include <dev/ic/mpuvar.h> 48 49 int mpu_isa_match(struct device *, void *, void *); 50 void mpu_isa_attach(struct device *, struct device *, void *); 51 int mpu_test(bus_space_tag_t, int); 52 53 #ifdef AUDIO_DEBUG 54 #define DPRINTF(x) if (mpu_debug) printf x 55 int mpu_debug = 0; 56 #else 57 #define DPRINTF(x) 58 #endif 59 60 #define MPU_GETSTATUS(iot, ioh) (bus_space_read_1(iot, ioh, MPU_STATUS)) 61 62 struct mpu_isa_softc { 63 struct device sc_dev; 64 65 struct mpu_softc sc_mpu; 66 }; 67 68 struct cfattach mpu_isa_ca = { 69 sizeof(struct mpu_isa_softc), mpu_isa_match, mpu_isa_attach 70 }; 71 72 int 73 mpu_test (iot, iobase) 74 bus_space_tag_t iot; 75 int iobase; /* base port number to try */ 76 { 77 bus_space_handle_t ioh; 78 int i, rc; 79 80 rc = 0; 81 if (bus_space_map(iot, iobase, MPU401_NPORT, 0, &ioh)) { 82 DPRINTF(("mpu_test: can't map: %x/2\n", iobase)); 83 return (0); 84 } 85 86 DPRINTF(("mpu_test: trying: %x\n", iobase)); 87 88 /* 89 * The following code is a shameless copy of mpu401.c 90 * it is here until a redesign of mpu_find() interface 91 */ 92 93 if (MPU_GETSTATUS(iot, ioh) == 0xff) 94 goto done; 95 96 for (i = 0; i < MPU_MAXWAIT; i++) { 97 if (!(MPU_GETSTATUS(iot, ioh) & MPU_OUTPUT_BUSY)) { 98 rc = 1; 99 break; 100 } 101 delay (10); 102 } 103 104 if (rc == 1) { 105 bus_space_write_1(iot, ioh, MPU_COMMAND, MPU_RESET); 106 rc = 0; 107 for (i = 0; i < 2 * MPU_MAXWAIT; i++) 108 if (!(MPU_GETSTATUS(iot, ioh) & MPU_INPUT_EMPTY) && 109 bus_space_read_1(iot, ioh, MPU_DATA) == MPU_ACK) { 110 rc = 1; 111 break; 112 } 113 } 114 done: 115 bus_space_unmap(iot, ioh, MPU401_NPORT); 116 117 return (rc); 118 } 119 120 int 121 mpu_isa_match(parent, match, aux) 122 struct device *parent; 123 void *match, *aux; 124 { 125 struct isa_attach_args *ia = aux; 126 127 if (mpu_test(ia->ia_iot, ia->ia_iobase)) { 128 ia->ia_iosize = MPU401_NPORT; 129 return (1); 130 } 131 132 return (0); 133 } 134 135 void 136 mpu_isa_attach(parent, self, aux) 137 struct device *parent, *self; 138 void *aux; 139 { 140 struct mpu_isa_softc *sc = (struct mpu_isa_softc *)self; 141 struct isa_attach_args *ia = aux; 142 143 sc->sc_mpu.iot = ia->ia_iot; 144 145 if (bus_space_map (ia->ia_iot, ia->ia_iobase, MPU401_NPORT, 146 0, &sc->sc_mpu.ioh)) { 147 printf(": can't map i/o space\n"); 148 return; 149 } 150 151 if (!mpu_find(&sc->sc_mpu)) { 152 printf(": find failed\n"); 153 return; 154 } 155 156 printf(": generic MPU-401 compatible\n"); 157 158 midi_attach_mi(&mpu_midi_hw_if, &sc->sc_mpu, &sc->sc_dev); 159 } 160