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ics2101.c revision 1.3 
      1 /* $NetBSD: ics2101.c,v 1.3 1996/02/05 02:22:11 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 REGENTS OR CONTRIBUTORS BE
     30  * 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 /*
     71  * Program one channel of the ICS mixer
     72  */
     73 
     74 
     75 static void
     76 ics2101_mix_doit(sc, chan, side, value, flags)
     77 	struct ics2101_softc *sc;
     78 	unsigned int chan, side, value, flags;
     79 {
     80 	unsigned char flip_left[6] = {0x01, 0x01, 0x01, 0x02, 0x01, 0x02};
     81 	unsigned char flip_right[6] = {0x02, 0x02, 0x02, 0x01, 0x02, 0x01};
     82 	register unsigned char ctrl_addr;
     83 	register unsigned char attn_addr;
     84 	register unsigned char normal;
     85 	int s;
     86 
     87 	if (chan < ICSMIX_CHAN_0 || chan > ICSMIX_CHAN_5)
     88 		return;
     89 	if (side != ICSMIX_LEFT && side != ICSMIX_RIGHT)
     90 		return;
     91 
     92 	if (flags & ICS_MUTE) {
     93 		value = cvt_value(sc->sc_setting[chan][side]);
     94 		sc->sc_mute[chan][side] = flags & ICS_MUTE_MUTED;
     95 	} else if (flags & ICS_VALUE) {
     96 		sc->sc_setting[chan][side] = value;
     97 		value = cvt_value(value);
     98 		if (value > ICSMIX_MIN_ATTN)
     99 			value = ICSMIX_MIN_ATTN;
    100 	} else
    101 		return;
    102 
    103 	ctrl_addr = chan << 3;
    104 	attn_addr = chan << 3;
    105 
    106 	if (side == ICSMIX_LEFT) {
    107 		ctrl_addr |= ICSMIX_CTRL_LEFT;
    108 		attn_addr |= ICSMIX_ATTN_LEFT;
    109 		if (sc->sc_mute[chan][side])
    110 			normal = 0x0;
    111 		else if (sc->sc_flags & ICS_FLIP)
    112 			normal = flip_left[chan];
    113 		else
    114 			normal = 0x01;
    115 	} else {
    116 		ctrl_addr |= ICSMIX_CTRL_RIGHT;
    117 		attn_addr |= ICSMIX_ATTN_RIGHT;
    118 		if (sc->sc_mute[chan][side])
    119 			normal = 0x0;
    120 		else if (sc->sc_flags & ICS_FLIP)
    121 			normal = flip_right[chan];
    122 		else
    123 			normal = 0x02;
    124 	}
    125 
    126 	s = splaudio();
    127 
    128 	outb(sc->sc_selio, ctrl_addr);
    129 	outb(sc->sc_dataio, normal);
    130 
    131 	outb(sc->sc_selio, attn_addr);
    132 	outb(sc->sc_dataio, (unsigned char) value);
    133 
    134 	splx(s);
    135 }
    136 
    137 void
    138 ics2101_mix_mute(sc, chan, side, domute)
    139 	struct ics2101_softc *sc;
    140 	unsigned int chan, side, domute;
    141 {
    142     ics2101_mix_doit(sc, chan, side, 0,
    143 		     domute ? ICS_MUTE|ICS_MUTE_MUTED : ICS_MUTE);
    144 }
    145 
    146 void
    147 ics2101_mix_attenuate(sc, chan, side, value)
    148 	struct ics2101_softc *sc;
    149 	unsigned int chan, side, value;
    150 {
    151     ics2101_mix_doit(sc, chan, side, value, ICS_VALUE);
    152 }
    153