sys/dev/isa/ics2101.c

   1 /* $NetBSD: ics2101.c,v 1.15 2008/04/28 20:23:52 martin 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  *
  19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  29  * POSSIBILITY OF SUCH DAMAGE.
  30  */
  31
  32 #include <sys/cdefs.h>
  33 __KERNEL_RCSID(0, "$NetBSD: ics2101.c,v 1.15 2008/04/28 20:23:52 martin Exp $");
  34
  35 #include <sys/param.h>
  36 #include <sys/systm.h>
  37 #include <sys/errno.h>
  38 #include <sys/ioctl.h>
  39 #include <sys/syslog.h>
  40 #include <sys/device.h>
  41 #include <sys/proc.h>
  42 #include <sys/buf.h>
  43
  44 #include <sys/cpu.h>
  45
  46 #include <sys/audioio.h>
  47 #include <dev/audio_if.h>
  48
  49 #include <dev/isa/isavar.h>
  50 #include <dev/isa/isadmavar.h>
  51
  52 #include <dev/ic/ics2101reg.h>
  53 #include <dev/isa/ics2101var.h>
  54
  55
  56 #define ICS_VALUE       0x01
  57 #define ICS_MUTE        0x02
  58 #define ICS_MUTE_MUTED  0x04
  59
  60 /* convert from [AUDIO_MIN_GAIN,AUDIO_MAX_GAIN] (0,255) to
  61    [ICSMIX_MAX_ATTN,ICSMIX_MIN_ATTN] (0,127) */
  62
  63 #define cvt_value(val) ((val) >> 1)
  64
  65 static void ics2101_mix_doit(struct ics2101_softc *, u_int, u_int, u_int,
  66     u_int);
  67 /*
  68  * Program one channel of the ICS mixer
  69  */
  70
  71
  72 static void
  73 ics2101_mix_doit(struct ics2101_softc *sc, u_int chan, u_int side, u_int value, u_int flags)
  74 {
  75         bus_space_tag_t iot = sc->sc_iot;
  76         unsigned char flip_left[6] = {0x01, 0x01, 0x01, 0x02, 0x01, 0x02};
  77         unsigned char flip_right[6] = {0x02, 0x02, 0x02, 0x01, 0x02, 0x01};
  78         unsigned char ctrl_addr;
  79         unsigned char attn_addr;
  80         unsigned char normal;
  81         int s;
  82
  83         if (/* chan < ICSMIX_CHAN_0 || */ chan > ICSMIX_CHAN_5)
  84                 return;
  85         if (side != ICSMIX_LEFT && side != ICSMIX_RIGHT)
  86                 return;
  87
  88         if (flags & ICS_MUTE) {
  89                 value = cvt_value(sc->sc_setting[chan][side]);
  90                 sc->sc_mute[chan][side] = flags & ICS_MUTE_MUTED;
  91         } else if (flags & ICS_VALUE) {
  92                 sc->sc_setting[chan][side] = value;
  93                 value = cvt_value(value);
  94                 if (value > ICSMIX_MIN_ATTN)
  95                         value = ICSMIX_MIN_ATTN;
  96         } else
  97                 return;
  98
  99         ctrl_addr = chan << 3;
 100         attn_addr = chan << 3;
 101
 102         if (side == ICSMIX_LEFT) {
 103                 ctrl_addr |= ICSMIX_CTRL_LEFT;
 104                 attn_addr |= ICSMIX_ATTN_LEFT;
 105                 if (sc->sc_mute[chan][side])
 106                         normal = 0x0;
 107                 else if (sc->sc_flags & ICS_FLIP)
 108                         normal = flip_left[chan];
 109                 else
 110                         normal = 0x01;
 111         } else {
 112                 ctrl_addr |= ICSMIX_CTRL_RIGHT;
 113                 attn_addr |= ICSMIX_ATTN_RIGHT;
 114                 if (sc->sc_mute[chan][side])
 115                         normal = 0x0;
 116                 else if (sc->sc_flags & ICS_FLIP)
 117                         normal = flip_right[chan];
 118                 else
 119                         normal = 0x02;
 120         }
 121
 122         s = splaudio();
 123
 124         bus_space_write_1(iot, sc->sc_selio_ioh, sc->sc_selio, ctrl_addr);
 125         bus_space_write_1(iot, sc->sc_dataio_ioh, sc->sc_dataio, normal);
 126
 127         bus_space_write_1(iot, sc->sc_selio_ioh, sc->sc_selio, attn_addr);
 128         bus_space_write_1(iot, sc->sc_dataio_ioh, sc->sc_dataio, (unsigned char) value);
 129
 130         splx(s);
 131 }
 132
 133 void
 134 ics2101_mix_mute(struct ics2101_softc *sc, unsigned int chan, unsigned int side, unsigned int 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(struct ics2101_softc *sc, unsigned int chan, unsigned int side, unsigned int value)
 142 {
 143     ics2101_mix_doit(sc, chan, side, value, ICS_VALUE);
 144 }