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ics2101.c revision 1.16 
      1 /* $NetBSD: ics2101.c,v 1.16 2009/03/14 21:04:20 dsl 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 1.16 2009/03/14 21:04:20 dsl 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 }
    145