1 /* $OpenBSD: ics2101.c,v 1.4 1998/04/26 21:02:44 provos 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 #include <machine/pio.h> 51 52 #include <sys/audioio.h> 53 #include <dev/audio_if.h> 54 55 #include <dev/isa/isavar.h> 56 #include <dev/isa/isadmavar.h> 57 58 #include <dev/ic/ics2101reg.h> 59 #include <dev/isa/ics2101var.h> 60 61 62 #define ICS_VALUE 0x01 63 #define ICS_MUTE 0x02 64 #define ICS_MUTE_MUTED 0x04 65 66 /* convert from [AUDIO_MIN_GAIN,AUDIO_MAX_GAIN] (0,255) to 67 [ICSMIX_MAX_ATTN,ICSMIX_MIN_ATTN] (0,127) */ 68 69 #define cvt_value(val) ((val) >> 1) 70 71 static void ics2101_mix_doit __P((struct ics2101_softc *, u_int, u_int, u_int, 72 u_int)); 73 /* 74 * Program one channel of the ICS mixer 75 */ 76 77 78 static void 79 ics2101_mix_doit(sc, chan, side, value, flags) 80 struct ics2101_softc *sc; 81 u_int chan, side, value, flags; 82 { 83 bus_space_tag_t iot = sc->sc_iot; 84 unsigned char flip_left[6] = {0x01, 0x01, 0x01, 0x02, 0x01, 0x02}; 85 unsigned char flip_right[6] = {0x02, 0x02, 0x02, 0x01, 0x02, 0x01}; 86 register unsigned char ctrl_addr; 87 register unsigned char attn_addr; 88 register unsigned char normal; 89 int s; 90 91 if (chan < ICSMIX_CHAN_0 || chan > ICSMIX_CHAN_5) 92 return; 93 if (side != ICSMIX_LEFT && side != ICSMIX_RIGHT) 94 return; 95 96 if (flags & ICS_MUTE) { 97 value = cvt_value(sc->sc_setting[chan][side]); 98 sc->sc_mute[chan][side] = flags & ICS_MUTE_MUTED; 99 } else if (flags & ICS_VALUE) { 100 sc->sc_setting[chan][side] = value; 101 value = cvt_value(value); 102 if (value > ICSMIX_MIN_ATTN) 103 value = ICSMIX_MIN_ATTN; 104 } else 105 return; 106 107 ctrl_addr = chan << 3; 108 attn_addr = chan << 3; 109 110 if (side == ICSMIX_LEFT) { 111 ctrl_addr |= ICSMIX_CTRL_LEFT; 112 attn_addr |= ICSMIX_ATTN_LEFT; 113 if (sc->sc_mute[chan][side]) 114 normal = 0x0; 115 else if (sc->sc_flags & ICS_FLIP) 116 normal = flip_left[chan]; 117 else 118 normal = 0x01; 119 } else { 120 ctrl_addr |= ICSMIX_CTRL_RIGHT; 121 attn_addr |= ICSMIX_ATTN_RIGHT; 122 if (sc->sc_mute[chan][side]) 123 normal = 0x0; 124 else if (sc->sc_flags & ICS_FLIP) 125 normal = flip_right[chan]; 126 else 127 normal = 0x02; 128 } 129 130 s = splaudio(); 131 132 bus_space_write_1(iot, sc->sc_selio_ioh, sc->sc_selio, ctrl_addr); 133 bus_space_write_1(iot, sc->sc_dataio_ioh, sc->sc_dataio, normal); 134 135 bus_space_write_1(iot, sc->sc_selio_ioh, sc->sc_selio, attn_addr); 136 bus_space_write_1(iot, sc->sc_dataio_ioh, sc->sc_dataio, (unsigned char) value); 137 138 splx(s); 139 } 140 141 void 142 ics2101_mix_mute(sc, chan, side, domute) 143 struct ics2101_softc *sc; 144 unsigned int chan, side, domute; 145 { 146 ics2101_mix_doit(sc, chan, side, 0, 147 domute ? ICS_MUTE|ICS_MUTE_MUTED : ICS_MUTE); 148 } 149 150 void 151 ics2101_mix_attenuate(sc, chan, side, value) 152 struct ics2101_softc *sc; 153 unsigned int chan, side, value; 154 { 155 ics2101_mix_doit(sc, chan, side, value, ICS_VALUE); 156 } 157