Annotation of sys/dev/isa/ics2101.c, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: ics2101.c,v 1.6 2003/04/10 10:11:24 miod Exp $ */
! 2: /* $NetBSD: ics2101.c,v 1.6 1997/10/09 07:57:23 jtc 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: #include <sys/param.h>
! 41: #include <sys/systm.h>
! 42: #include <sys/errno.h>
! 43: #include <sys/ioctl.h>
! 44: #include <sys/syslog.h>
! 45: #include <sys/device.h>
! 46: #include <sys/proc.h>
! 47: #include <sys/buf.h>
! 48:
! 49: #include <machine/cpu.h>
! 50:
! 51: #include <sys/audioio.h>
! 52: #include <dev/audio_if.h>
! 53:
! 54: #include <dev/isa/isavar.h>
! 55: #include <dev/isa/isadmavar.h>
! 56:
! 57: #include <dev/ic/ics2101reg.h>
! 58: #include <dev/isa/ics2101var.h>
! 59:
! 60:
! 61: #define ICS_VALUE 0x01
! 62: #define ICS_MUTE 0x02
! 63: #define ICS_MUTE_MUTED 0x04
! 64:
! 65: /* convert from [AUDIO_MIN_GAIN,AUDIO_MAX_GAIN] (0,255) to
! 66: [ICSMIX_MAX_ATTN,ICSMIX_MIN_ATTN] (0,127) */
! 67:
! 68: #define cvt_value(val) ((val) >> 1)
! 69:
! 70: static void ics2101_mix_doit(struct ics2101_softc *, u_int, u_int, u_int,
! 71: u_int);
! 72: /*
! 73: * Program one channel of the ICS mixer
! 74: */
! 75:
! 76:
! 77: static void
! 78: ics2101_mix_doit(sc, chan, side, value, flags)
! 79: struct ics2101_softc *sc;
! 80: u_int chan, side, value, flags;
! 81: {
! 82: bus_space_tag_t iot = sc->sc_iot;
! 83: unsigned char flip_left[6] = {0x01, 0x01, 0x01, 0x02, 0x01, 0x02};
! 84: unsigned char flip_right[6] = {0x02, 0x02, 0x02, 0x01, 0x02, 0x01};
! 85: register unsigned char ctrl_addr;
! 86: register unsigned char attn_addr;
! 87: register unsigned char normal;
! 88: int s;
! 89:
! 90: if (chan < ICSMIX_CHAN_0 || chan > ICSMIX_CHAN_5)
! 91: return;
! 92: if (side != ICSMIX_LEFT && side != ICSMIX_RIGHT)
! 93: return;
! 94:
! 95: if (flags & ICS_MUTE) {
! 96: value = cvt_value(sc->sc_setting[chan][side]);
! 97: sc->sc_mute[chan][side] = flags & ICS_MUTE_MUTED;
! 98: } else if (flags & ICS_VALUE) {
! 99: sc->sc_setting[chan][side] = value;
! 100: value = cvt_value(value);
! 101: if (value > ICSMIX_MIN_ATTN)
! 102: value = ICSMIX_MIN_ATTN;
! 103: } else
! 104: return;
! 105:
! 106: ctrl_addr = chan << 3;
! 107: attn_addr = chan << 3;
! 108:
! 109: if (side == ICSMIX_LEFT) {
! 110: ctrl_addr |= ICSMIX_CTRL_LEFT;
! 111: attn_addr |= ICSMIX_ATTN_LEFT;
! 112: if (sc->sc_mute[chan][side])
! 113: normal = 0x0;
! 114: else if (sc->sc_flags & ICS_FLIP)
! 115: normal = flip_left[chan];
! 116: else
! 117: normal = 0x01;
! 118: } else {
! 119: ctrl_addr |= ICSMIX_CTRL_RIGHT;
! 120: attn_addr |= ICSMIX_ATTN_RIGHT;
! 121: if (sc->sc_mute[chan][side])
! 122: normal = 0x0;
! 123: else if (sc->sc_flags & ICS_FLIP)
! 124: normal = flip_right[chan];
! 125: else
! 126: normal = 0x02;
! 127: }
! 128:
! 129: s = splaudio();
! 130:
! 131: bus_space_write_1(iot, sc->sc_selio_ioh, sc->sc_selio, ctrl_addr);
! 132: bus_space_write_1(iot, sc->sc_dataio_ioh, sc->sc_dataio, normal);
! 133:
! 134: bus_space_write_1(iot, sc->sc_selio_ioh, sc->sc_selio, attn_addr);
! 135: bus_space_write_1(iot, sc->sc_dataio_ioh, sc->sc_dataio, (unsigned char) value);
! 136:
! 137: splx(s);
! 138: }
! 139:
! 140: void
! 141: ics2101_mix_mute(sc, chan, side, domute)
! 142: struct ics2101_softc *sc;
! 143: unsigned int chan, side, domute;
! 144: {
! 145: ics2101_mix_doit(sc, chan, side, 0,
! 146: domute ? ICS_MUTE|ICS_MUTE_MUTED : ICS_MUTE);
! 147: }
! 148:
! 149: void
! 150: ics2101_mix_attenuate(sc, chan, side, value)
! 151: struct ics2101_softc *sc;
! 152: unsigned int chan, side, value;
! 153: {
! 154: ics2101_mix_doit(sc, chan, side, value, ICS_VALUE);
! 155: }
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