Annotation of sys/dev/isa/gus_isapnp.c, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: gus_isapnp.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: int gus_isapnp_match(struct device *, void *, void *);
! 133: void gus_isapnp_attach(struct device *, struct device *, void *);
! 134:
! 135: struct cfattach gus_isapnp_ca = {
! 136: sizeof(struct gus_softc), gus_isapnp_match, gus_isapnp_attach
! 137: };
! 138:
! 139: /*
! 140: * Probe for the GUS hardware.
! 141: */
! 142: int
! 143: gus_isapnp_match(parent, match, aux)
! 144: struct device *parent;
! 145: void *match, *aux;
! 146: {
! 147: return 1;
! 148: }
! 149:
! 150: void
! 151: gus_isapnp_attach(parent, self, aux)
! 152: struct device *parent, *self;
! 153: void *aux;
! 154: {
! 155: struct gus_softc *sc = (void *) self;
! 156: struct isa_attach_args *ipa = aux;
! 157:
! 158: sc->sc_iot = ipa->ia_iot;
! 159: sc->sc_iobase = ipa->ia_iobase;
! 160:
! 161: sc->sc_ioh1 = ipa->ipa_io[0].h; /* p2xr */
! 162: sc->sc_ioh2 = ipa->ipa_io[1].h; /* p3xr */
! 163: sc->sc_ioh3 = ipa->ipa_io[2].h; /* codec/mixer */
! 164: sc->sc_ioh4 = NULL; /* midi */
! 165:
! 166: sc->sc_irq = ipa->ipa_irq[0].num;
! 167: sc->sc_drq = ipa->ipa_drq[1].num;
! 168: sc->sc_recdrq = ipa->ipa_drq[0].num;
! 169: sc->sc_isa = parent->dv_parent;
! 170:
! 171: gus_subattach(sc, ipa);
! 172: }
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