1 /* $OpenBSD: ics2101.c,v 1.10 2021/03/07 06:17:03 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(struct ics2101_softc *sc, u_int chan, u_int side, u_int value, 71 u_int flags) 72 { 73 bus_space_tag_t iot = sc->sc_iot; 74 unsigned char flip_left[6] = {0x01, 0x01, 0x01, 0x02, 0x01, 0x02}; 75 unsigned char flip_right[6] = {0x02, 0x02, 0x02, 0x01, 0x02, 0x01}; 76 register unsigned char ctrl_addr; 77 register unsigned char attn_addr; 78 register unsigned char normal; 79 80 if (chan < ICSMIX_CHAN_0 || chan > ICSMIX_CHAN_5) 81 return; 82 if (side != ICSMIX_LEFT && side != ICSMIX_RIGHT) 83 return; 84 85 if (flags & ICS_MUTE) { 86 value = cvt_value(sc->sc_setting[chan][side]); 87 sc->sc_mute[chan][side] = flags & ICS_MUTE_MUTED; 88 } else if (flags & ICS_VALUE) { 89 sc->sc_setting[chan][side] = value; 90 value = cvt_value(value); 91 if (value > ICSMIX_MIN_ATTN) 92 value = ICSMIX_MIN_ATTN; 93 } else 94 return; 95 96 ctrl_addr = chan << 3; 97 attn_addr = chan << 3; 98 99 if (side == ICSMIX_LEFT) { 100 ctrl_addr |= ICSMIX_CTRL_LEFT; 101 attn_addr |= ICSMIX_ATTN_LEFT; 102 if (sc->sc_mute[chan][side]) 103 normal = 0x0; 104 else if (sc->sc_flags & ICS_FLIP) 105 normal = flip_left[chan]; 106 else 107 normal = 0x01; 108 } else { 109 ctrl_addr |= ICSMIX_CTRL_RIGHT; 110 attn_addr |= ICSMIX_ATTN_RIGHT; 111 if (sc->sc_mute[chan][side]) 112 normal = 0x0; 113 else if (sc->sc_flags & ICS_FLIP) 114 normal = flip_right[chan]; 115 else 116 normal = 0x02; 117 } 118 119 mtx_enter(&audio_lock); 120 121 bus_space_write_1(iot, sc->sc_selio_ioh, sc->sc_selio, ctrl_addr); 122 bus_space_write_1(iot, sc->sc_dataio_ioh, sc->sc_dataio, normal); 123 124 bus_space_write_1(iot, sc->sc_selio_ioh, sc->sc_selio, attn_addr); 125 bus_space_write_1(iot, sc->sc_dataio_ioh, sc->sc_dataio, (unsigned char) value); 126 127 mtx_leave(&audio_lock); 128 } 129 130 void 131 ics2101_mix_mute(struct ics2101_softc *sc, unsigned int chan, unsigned int side, 132 unsigned int domute) 133 { 134 ics2101_mix_doit(sc, chan, side, 0, 135 domute ? ICS_MUTE|ICS_MUTE_MUTED : ICS_MUTE); 136 } 137 138 void 139 ics2101_mix_attenuate(struct ics2101_softc *sc, unsigned int chan, 140 unsigned int side, unsigned int value) 141 { 142 ics2101_mix_doit(sc, chan, side, value, ICS_VALUE); 143 } 144