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ics2101.c revision 1.1 
      1 /* $NetBSD: ics2101.c,v 1.1 1995/07/19 19:58:49 brezak Exp $ */
      2 /*-
      3  * Copyright (c) 1995 John T. Kohl.  All Rights Reserved.
      4  * Copyright (c) 1994 The Regents of the University of California.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to Berkeley by
      8  * Ken Hornstein.
      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 University of
     21  *      California, Berkeley and its contributors.
     22  * 4. Neither the name of the University nor the names of its contributors
     23  *    may be used to endorse or promote products derived from this software
     24  *    without specific prior written permission.
     25  *
     26  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     27  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     28  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     29  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     30  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     31  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     32  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     33  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     34  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     35  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     36  * SUCH DAMAGE.
     37  *
     38  *	$Id: ics2101.c,v 1.1 1995/07/19 19:58:49 brezak Exp $
     39  */
     40 
     41 #include <sys/param.h>
     42 #include <sys/systm.h>
     43 #include <sys/errno.h>
     44 #include <sys/ioctl.h>
     45 #include <sys/syslog.h>
     46 #include <sys/device.h>
     47 #include <sys/proc.h>
     48 #include <sys/buf.h>
     49 
     50 #include <machine/cpu.h>
     51 #include <machine/pio.h>
     52 
     53 #include <sys/audioio.h>
     54 #include <dev/audio_if.h>
     55 
     56 #include <dev/isa/isavar.h>
     57 #include <dev/isa/isadmavar.h>
     58 
     59 #include <dev/ic/ics2101reg.h>
     60 #include <dev/isa/ics2101var.h>
     61 
     62 
     63 #define ICS_VALUE	0x01
     64 #define ICS_MUTE	0x02
     65 #define ICS_MUTE_MUTED	0x04
     66 
     67 /* convert from [AUDIO_MIN_GAIN,AUDIO_MAX_GAIN] (0,255) to
     68    [ICSMIX_MAX_ATTN,ICSMIX_MIN_ATTN] (0,127) */
     69 
     70 #define cvt_value(val) ((val) >> 1)
     71 
     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 	unsigned int chan, side, value, flags;
     81 {
     82 	unsigned char flip_left[6] = {0x01, 0x01, 0x01, 0x02, 0x01, 0x02};
     83 	unsigned char flip_right[6] = {0x02, 0x02, 0x02, 0x01, 0x02, 0x01};
     84 	register unsigned char ctrl_addr;
     85 	register unsigned char attn_addr;
     86 	register unsigned char normal;
     87 	int s;
     88 
     89 	if (chan < ICSMIX_CHAN_0 || chan > ICSMIX_CHAN_5)
     90 		return;
     91 	if (side != ICSMIX_LEFT && side != ICSMIX_RIGHT)
     92 		return;
     93 
     94 	if (flags & ICS_MUTE) {
     95 		value = cvt_value(sc->sc_setting[chan][side]);
     96 		sc->sc_mute[chan][side] = flags & ICS_MUTE_MUTED;
     97 	} else if (flags & ICS_VALUE) {
     98 		sc->sc_setting[chan][side] = value;
     99 		value = cvt_value(value);
    100 		if (value > ICSMIX_MIN_ATTN)
    101 			value = ICSMIX_MIN_ATTN;
    102 	} else
    103 		return;
    104 
    105 	ctrl_addr = chan << 3;
    106 	attn_addr = chan << 3;
    107 
    108 	if (side == ICSMIX_LEFT) {
    109 		ctrl_addr |= ICSMIX_CTRL_LEFT;
    110 		attn_addr |= ICSMIX_ATTN_LEFT;
    111 		if (sc->sc_mute[chan][side])
    112 			normal = 0x0;
    113 		else if (sc->sc_flags & ICS_FLIP)
    114 			normal = flip_left[chan];
    115 		else
    116 			normal = 0x01;
    117 	} else {
    118 		ctrl_addr |= ICSMIX_CTRL_RIGHT;
    119 		attn_addr |= ICSMIX_ATTN_RIGHT;
    120 		if (sc->sc_mute[chan][side])
    121 			normal = 0x0;
    122 		else if (sc->sc_flags & ICS_FLIP)
    123 			normal = flip_right[chan];
    124 		else
    125 			normal = 0x02;
    126 	}
    127 
    128 	s = splaudio();
    129 
    130 	outb(sc->sc_selio, ctrl_addr);
    131 	outb(sc->sc_dataio, normal);
    132 
    133 	outb(sc->sc_selio, attn_addr);
    134 	outb(sc->sc_dataio, (unsigned char) value);
    135 
    136 	splx(s);
    137 }
    138 
    139 void
    140 ics2101_mix_mute(sc, chan, side, domute)
    141 	struct ics2101_softc *sc;
    142 	unsigned int chan, side, domute;
    143 {
    144     ics2101_mix_doit(sc, chan, side, 0,
    145 		     domute ? ICS_MUTE|ICS_MUTE_MUTED : ICS_MUTE);
    146 }
    147 
    148 void
    149 ics2101_mix_attenuate(sc, chan, side, value)
    150 	struct ics2101_softc *sc;
    151 	unsigned int chan, side, value;
    152 {
    153     ics2101_mix_doit(sc, chan, side, value, ICS_VALUE);
    154 }
    155