ics2101.c revision 1.8
1 /* $NetBSD: ics2101.c,v 1.8 2000/03/30 12:45:33 augustss Exp $ */ 2 3 /*- 4 * Copyright (c) 1996 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Ken Hornstein and John Kohl. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 #include <sys/param.h> 40 #include <sys/systm.h> 41 #include <sys/errno.h> 42 #include <sys/ioctl.h> 43 #include <sys/syslog.h> 44 #include <sys/device.h> 45 #include <sys/proc.h> 46 #include <sys/buf.h> 47 48 #include <machine/cpu.h> 49 50 #include <sys/audioio.h> 51 #include <dev/audio_if.h> 52 53 #include <dev/isa/isavar.h> 54 #include <dev/isa/isadmavar.h> 55 56 #include <dev/ic/ics2101reg.h> 57 #include <dev/isa/ics2101var.h> 58 59 60 #define ICS_VALUE 0x01 61 #define ICS_MUTE 0x02 62 #define ICS_MUTE_MUTED 0x04 63 64 /* convert from [AUDIO_MIN_GAIN,AUDIO_MAX_GAIN] (0,255) to 65 [ICSMIX_MAX_ATTN,ICSMIX_MIN_ATTN] (0,127) */ 66 67 #define cvt_value(val) ((val) >> 1) 68 69 static void ics2101_mix_doit __P((struct ics2101_softc *, u_int, u_int, u_int, 70 u_int)); 71 /* 72 * Program one channel of the ICS mixer 73 */ 74 75 76 static void 77 ics2101_mix_doit(sc, chan, side, value, flags) 78 struct ics2101_softc *sc; 79 u_int chan, side, value, flags; 80 { 81 bus_space_tag_t iot = sc->sc_iot; 82 unsigned char flip_left[6] = {0x01, 0x01, 0x01, 0x02, 0x01, 0x02}; 83 unsigned char flip_right[6] = {0x02, 0x02, 0x02, 0x01, 0x02, 0x01}; 84 unsigned char ctrl_addr; 85 unsigned char attn_addr; 86 unsigned char normal; 87 int s; 88 89 if (chan < ICSMIX_CHAN_0 || chan > ICSMIX_CHAN_5) 90 return; 91 if (side != ICSMIX_LEFT && side != ICSMIX_RIGHT) 92 return; 93 94 if (flags & ICS_MUTE) { 95 value = cvt_value(sc->sc_setting[chan][side]); 96 sc->sc_mute[chan][side] = flags & ICS_MUTE_MUTED; 97 } else if (flags & ICS_VALUE) { 98 sc->sc_setting[chan][side] = value; 99 value = cvt_value(value); 100 if (value > ICSMIX_MIN_ATTN) 101 value = ICSMIX_MIN_ATTN; 102 } else 103 return; 104 105 ctrl_addr = chan << 3; 106 attn_addr = chan << 3; 107 108 if (side == ICSMIX_LEFT) { 109 ctrl_addr |= ICSMIX_CTRL_LEFT; 110 attn_addr |= ICSMIX_ATTN_LEFT; 111 if (sc->sc_mute[chan][side]) 112 normal = 0x0; 113 else if (sc->sc_flags & ICS_FLIP) 114 normal = flip_left[chan]; 115 else 116 normal = 0x01; 117 } else { 118 ctrl_addr |= ICSMIX_CTRL_RIGHT; 119 attn_addr |= ICSMIX_ATTN_RIGHT; 120 if (sc->sc_mute[chan][side]) 121 normal = 0x0; 122 else if (sc->sc_flags & ICS_FLIP) 123 normal = flip_right[chan]; 124 else 125 normal = 0x02; 126 } 127 128 s = splaudio(); 129 130 bus_space_write_1(iot, sc->sc_selio_ioh, sc->sc_selio, ctrl_addr); 131 bus_space_write_1(iot, sc->sc_dataio_ioh, sc->sc_dataio, normal); 132 133 bus_space_write_1(iot, sc->sc_selio_ioh, sc->sc_selio, attn_addr); 134 bus_space_write_1(iot, sc->sc_dataio_ioh, sc->sc_dataio, (unsigned char) value); 135 136 splx(s); 137 } 138 139 void 140 ics2101_mix_mute(sc, chan, side, domute) 141 struct ics2101_softc *sc; 142 unsigned int chan, side, domute; 143 { 144 ics2101_mix_doit(sc, chan, side, 0, 145 domute ? ICS_MUTE|ICS_MUTE_MUTED : ICS_MUTE); 146 } 147 148 void 149 ics2101_mix_attenuate(sc, chan, side, value) 150 struct ics2101_softc *sc; 151 unsigned int chan, side, value; 152 { 153 ics2101_mix_doit(sc, chan, side, value, ICS_VALUE); 154 } 155
Indexes created Tue Sep 23 23:09:58 GMT 2025