1 /* $OpenBSD: ics2101.c,v 1.9 2014/09/14 14:17:25 jsg 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 * 20 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 22 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 23 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 24 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 30 * POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 #include <sys/param.h> 34 #include <sys/systm.h> 35 #include <sys/errno.h> 36 #include <sys/ioctl.h> 37 #include <sys/syslog.h> 38 #include <sys/device.h> 39 #include <sys/buf.h> 40 41 #include <machine/cpu.h> 42 43 #include <sys/audioio.h> 44 #include <dev/audio_if.h> 45 46 #include <dev/isa/isavar.h> 47 #include <dev/isa/isadmavar.h> 48 49 #include <dev/ic/ics2101reg.h> 50 #include <dev/isa/ics2101var.h> 51 52 53 #define ICS_VALUE 0x01 54 #define ICS_MUTE 0x02 55 #define ICS_MUTE_MUTED 0x04 56 57 /* convert from [AUDIO_MIN_GAIN,AUDIO_MAX_GAIN] (0,255) to 58 [ICSMIX_MAX_ATTN,ICSMIX_MIN_ATTN] (0,127) */ 59 60 #define cvt_value(val) ((val) >> 1) 61 62 static void ics2101_mix_doit(struct ics2101_softc *, u_int, u_int, u_int, 63 u_int); 64 /* 65 * Program one channel of the ICS mixer 66 */ 67 68 69 static void 70 ics2101_mix_doit(sc, chan, side, value, flags) 71 struct ics2101_softc *sc; 72 u_int chan, side, value, flags; 73 { 74 bus_space_tag_t iot = sc->sc_iot; 75 unsigned char flip_left[6] = {0x01, 0x01, 0x01, 0x02, 0x01, 0x02}; 76 unsigned char flip_right[6] = {0x02, 0x02, 0x02, 0x01, 0x02, 0x01}; 77 register unsigned char ctrl_addr; 78 register unsigned char attn_addr; 79 register unsigned char normal; 80 81 if (chan < ICSMIX_CHAN_0 || chan > ICSMIX_CHAN_5) 82 return; 83 if (side != ICSMIX_LEFT && side != ICSMIX_RIGHT) 84 return; 85 86 if (flags & ICS_MUTE) { 87 value = cvt_value(sc->sc_setting[chan][side]); 88 sc->sc_mute[chan][side] = flags & ICS_MUTE_MUTED; 89 } else if (flags & ICS_VALUE) { 90 sc->sc_setting[chan][side] = value; 91 value = cvt_value(value); 92 if (value > ICSMIX_MIN_ATTN) 93 value = ICSMIX_MIN_ATTN; 94 } else 95 return; 96 97 ctrl_addr = chan << 3; 98 attn_addr = chan << 3; 99 100 if (side == ICSMIX_LEFT) { 101 ctrl_addr |= ICSMIX_CTRL_LEFT; 102 attn_addr |= ICSMIX_ATTN_LEFT; 103 if (sc->sc_mute[chan][side]) 104 normal = 0x0; 105 else if (sc->sc_flags & ICS_FLIP) 106 normal = flip_left[chan]; 107 else 108 normal = 0x01; 109 } else { 110 ctrl_addr |= ICSMIX_CTRL_RIGHT; 111 attn_addr |= ICSMIX_ATTN_RIGHT; 112 if (sc->sc_mute[chan][side]) 113 normal = 0x0; 114 else if (sc->sc_flags & ICS_FLIP) 115 normal = flip_right[chan]; 116 else 117 normal = 0x02; 118 } 119 120 mtx_enter(&audio_lock); 121 122 bus_space_write_1(iot, sc->sc_selio_ioh, sc->sc_selio, ctrl_addr); 123 bus_space_write_1(iot, sc->sc_dataio_ioh, sc->sc_dataio, normal); 124 125 bus_space_write_1(iot, sc->sc_selio_ioh, sc->sc_selio, attn_addr); 126 bus_space_write_1(iot, sc->sc_dataio_ioh, sc->sc_dataio, (unsigned char) value); 127 128 mtx_leave(&audio_lock); 129 } 130 131 void 132 ics2101_mix_mute(sc, chan, side, domute) 133 struct ics2101_softc *sc; 134 unsigned int chan, side, domute; 135 { 136 ics2101_mix_doit(sc, chan, side, 0, 137 domute ? ICS_MUTE|ICS_MUTE_MUTED : ICS_MUTE); 138 } 139 140 void 141 ics2101_mix_attenuate(sc, chan, side, value) 142 struct ics2101_softc *sc; 143 unsigned int chan, side, value; 144 { 145 ics2101_mix_doit(sc, chan, side, value, ICS_VALUE); 146 } 147