Annotation of sys/dev/isa/gus_isa.c, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: gus_isa.c,v 1.4 2004/06/13 21:49:24 niklas Exp $ */
! 2: /* $NetBSD: gus.c,v 1.51 1998/01/25 23:48:06 mycroft Exp $ */
! 3:
! 4: /*-
! 5: * Copyright (c) 1996 The NetBSD Foundation, Inc.
! 6: * All rights reserved.
! 7: *
! 8: * This code is derived from software contributed to The NetBSD Foundation
! 9: * by Ken Hornstein and John Kohl.
! 10: *
! 11: * Redistribution and use in source and binary forms, with or without
! 12: * modification, are permitted provided that the following conditions
! 13: * are met:
! 14: * 1. Redistributions of source code must retain the above copyright
! 15: * notice, this list of conditions and the following disclaimer.
! 16: * 2. Redistributions in binary form must reproduce the above copyright
! 17: * notice, this list of conditions and the following disclaimer in the
! 18: * documentation and/or other materials provided with the distribution.
! 19: * 3. All advertising materials mentioning features or use of this software
! 20: * must display the following acknowledgement:
! 21: * This product includes software developed by the NetBSD
! 22: * Foundation, Inc. and its contributors.
! 23: * 4. Neither the name of The NetBSD Foundation nor the names of its
! 24: * contributors may be used to endorse or promote products derived
! 25: * from this software without specific prior written permission.
! 26: *
! 27: * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
! 28: * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
! 29: * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
! 30: * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
! 31: * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
! 32: * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
! 33: * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
! 34: * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
! 35: * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
! 36: * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
! 37: * POSSIBILITY OF SUCH DAMAGE.
! 38: */
! 39:
! 40: /*
! 41: *
! 42: * TODO:
! 43: * . figure out why mixer activity while sound is playing causes problems
! 44: * (phantom interrupts?)
! 45: * . figure out a better deinterleave strategy that avoids sucking up
! 46: * CPU, memory and cache bandwidth. (Maybe a special encoding?
! 47: * Maybe use the double-speed sampling/hardware deinterleave trick
! 48: * from the GUS SDK?) A 486/33 isn't quite fast enough to keep
! 49: * up with 44.1kHz 16-bit stereo output without some drop-outs.
! 50: * . use CS4231 for 16-bit sampling, for a-law and mu-law playback.
! 51: * . actually test full-duplex sampling(recording) and playback.
! 52: */
! 53:
! 54: /*
! 55: * Gravis UltraSound driver
! 56: *
! 57: * For more detailed information, see the GUS developers' kit
! 58: * available on the net at:
! 59: *
! 60: * ftp://freedom.nmsu.edu/pub/ultrasound/gravis/util/
! 61: * gusdkXXX.zip (developers' kit--get rev 2.22 or later)
! 62: * See ultrawrd.doc inside--it's MS Word (ick), but it's the bible
! 63: *
! 64: */
! 65:
! 66: /*
! 67: * The GUS Max has a slightly strange set of connections between the CS4231
! 68: * and the GF1 and the DMA interconnects. It's set up so that the CS4231 can
! 69: * be playing while the GF1 is loading patches from the system.
! 70: *
! 71: * Here's a recreation of the DMA interconnect diagram:
! 72: *
! 73: * GF1
! 74: * +---------+ digital
! 75: * | | record ASIC
! 76: * | |--------------+
! 77: * | | | +--------+
! 78: * | | play (dram) | +----+ | |
! 79: * | |--------------(------|-\ | | +-+ |
! 80: * +---------+ | | >-|----|---|C|--|------ dma chan 1
! 81: * | +---|-/ | | +-+ |
! 82: * | | +----+ | | |
! 83: * | | +----+ | | |
! 84: * +---------+ +-+ +--(---|-\ | | | |
! 85: * | | play |8| | | >-|----|----+---|------ dma chan 2
! 86: * | ---C----|--------|/|------(---|-/ | | |
! 87: * | ^ |record |1| | +----+ | |
! 88: * | | | /----|6|------+ +--------+
! 89: * | ---+----|--/ +-+
! 90: * +---------+
! 91: * CS4231 8-to-16 bit bus conversion, if needed
! 92: *
! 93: *
! 94: * "C" is an optional combiner.
! 95: *
! 96: */
! 97:
! 98: #include <sys/param.h>
! 99: #include <sys/systm.h>
! 100: #include <sys/errno.h>
! 101: #include <sys/ioctl.h>
! 102: #include <sys/syslog.h>
! 103: #include <sys/device.h>
! 104: #include <sys/proc.h>
! 105: #include <sys/buf.h>
! 106: #include <sys/fcntl.h>
! 107: #include <sys/malloc.h>
! 108: #include <sys/kernel.h>
! 109: #include <sys/timeout.h>
! 110:
! 111: #include <machine/cpu.h>
! 112: #include <machine/intr.h>
! 113: #include <machine/bus.h>
! 114: #include <machine/cpufunc.h>
! 115: #include <sys/audioio.h>
! 116: #include <dev/audio_if.h>
! 117: #include <dev/mulaw.h>
! 118: #include <dev/auconv.h>
! 119:
! 120: #include <dev/isa/isavar.h>
! 121: #include <dev/isa/isadmavar.h>
! 122:
! 123: #include <dev/ic/ics2101reg.h>
! 124: #include <dev/ic/cs4231reg.h>
! 125: #include <dev/ic/ad1848reg.h>
! 126: #include <dev/isa/ics2101var.h>
! 127: #include <dev/isa/ad1848var.h>
! 128: #include <dev/isa/cs4231var.h>
! 129: #include "gusreg.h"
! 130: #include "gusvar.h"
! 131:
! 132: /*
! 133: * ISA bus driver routines
! 134: */
! 135:
! 136: int gus_isa_match(struct device *, void *, void *);
! 137: void gus_isa_attach(struct device *, struct device *, void *);
! 138:
! 139: struct cfattach gus_isa_ca = {
! 140: sizeof(struct gus_softc), gus_isa_match, gus_isa_attach,
! 141: };
! 142:
! 143: int
! 144: gus_isa_match(parent, match, aux)
! 145: struct device *parent;
! 146: void *match;
! 147: void *aux;
! 148: {
! 149: struct isa_attach_args *ia = aux;
! 150: int iobase = ia->ia_iobase;
! 151: int recdrq = ia->ia_drq2;
! 152:
! 153: /*
! 154: * Before we do anything else, make sure requested IRQ and DRQ are
! 155: * valid for this card.
! 156: */
! 157:
! 158: /* XXX range check before indexing!! */
! 159: if (ia->ia_irq == IRQUNK || gus_irq_map[ia->ia_irq] == IRQUNK) {
! 160: DPRINTF(("gus: invalid irq %d, card not probed\n", ia->ia_irq));
! 161: return 0;
! 162: }
! 163:
! 164: if (ia->ia_drq == DRQUNK || gus_drq_map[ia->ia_drq] == DRQUNK) {
! 165: DPRINTF(("gus: invalid drq %d, card not probed\n", ia->ia_drq));
! 166: return 0;
! 167: }
! 168:
! 169: if (recdrq != DRQUNK) {
! 170: if (recdrq > 7 || gus_drq_map[recdrq] == DRQUNK) {
! 171: DPRINTF(("gus: invalid second DMA channel (%d), card not probed\n", recdrq));
! 172: return 0;
! 173: }
! 174: } else
! 175: recdrq = ia->ia_drq;
! 176:
! 177: if (iobase == IOBASEUNK) {
! 178: int i;
! 179: for(i = 0; i < gus_addrs; i++)
! 180: if (gus_test_iobase(ia->ia_iot, gus_base_addrs[i])) {
! 181: iobase = gus_base_addrs[i];
! 182: goto done;
! 183: }
! 184: return 0;
! 185: } else if (!gus_test_iobase(ia->ia_iot, iobase))
! 186: return 0;
! 187:
! 188: done:
! 189: if ((ia->ia_drq != -1 && !isa_drq_isfree(parent, ia->ia_drq)) ||
! 190: (recdrq != -1 && !isa_drq_isfree(parent, recdrq)))
! 191: return 0;
! 192:
! 193: ia->ia_iobase = iobase;
! 194: ia->ia_iosize = GUS_NPORT1;
! 195: return 1;
! 196: }
! 197:
! 198:
! 199: /*
! 200: * Setup the GUS for use; called shortly after probe
! 201: */
! 202:
! 203: void
! 204: gus_isa_attach(parent, self, aux)
! 205: struct device *parent, *self;
! 206: void *aux;
! 207: {
! 208: struct gus_softc *sc = (void *) self;
! 209: struct isa_attach_args *ia = aux;
! 210:
! 211: sc->sc_iot = ia->ia_iot;
! 212: sc->sc_iobase = ia->ia_iobase;
! 213:
! 214: /* Map i/o space */
! 215: if (bus_space_map(sc->sc_iot, sc->sc_iobase, GUS_NPORT1, 0, &sc->sc_ioh1))
! 216: panic("%s: can't map io port range 1", self->dv_xname);
! 217: if (bus_space_map(sc->sc_iot, sc->sc_iobase+GUS_IOH2_OFFSET, GUS_NPORT2, 0,
! 218: &sc->sc_ioh2))
! 219: panic("%s: can't map io port range 2", self->dv_xname);
! 220:
! 221: /* XXX Maybe we shouldn't fail on mapping this, but just assume
! 222: * the card is of revision 0? */
! 223: if (bus_space_map(sc->sc_iot, sc->sc_iobase+GUS_IOH3_OFFSET, GUS_NPORT3, 0,
! 224: &sc->sc_ioh3))
! 225: panic("%s: can't map io port range 3", self->dv_xname);
! 226:
! 227: if (bus_space_map(sc->sc_iot, sc->sc_iobase+GUS_IOH4_OFFSET, GUS_NPORT4, 0,
! 228: &sc->sc_ioh4))
! 229: panic("%s: can't map io port range 4", self->dv_xname);
! 230:
! 231: sc->sc_irq = ia->ia_irq;
! 232: sc->sc_drq = ia->ia_drq;
! 233: sc->sc_recdrq = ia->ia_drq2;
! 234: sc->sc_isa = parent;
! 235:
! 236: gus_subattach(sc, aux);
! 237: }
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