1 /* $NetBSD: ics2101.c,v 1.6 1997/10/09 07:57:23 jtc 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 #include <machine/pio.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 __P((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 } 156