1 /* $OpenBSD: ics2101.c,v 1.6 2003/04/10 10:11:24 miod 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 * 3. All advertising materials mentioning features or use of this software
20 * must display the following acknowledgement:
21 * This product includes software developed by the NetBSD
22 * Foundation, Inc. and its contributors.
23 * 4. Neither the name of The NetBSD Foundation nor the names of its
24 * contributors may be used to endorse or promote products derived
25 * from this software without specific prior written permission.
26 *
27 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
28 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
29 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
30 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
31 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
32 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
33 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
34 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
35 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
36 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
37 * POSSIBILITY OF SUCH DAMAGE.
38 */
39
40 #include <sys/param.h>
41 #include <sys/systm.h>
42 #include <sys/errno.h>
43 #include <sys/ioctl.h>
44 #include <sys/syslog.h>
45 #include <sys/device.h>
46 #include <sys/proc.h>
47 #include <sys/buf.h>
48
49 #include <machine/cpu.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 static void ics2101_mix_doit(struct ics2101_softc *, u_int, u_int, u_int,
71 u_int);
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 u_int chan, side, value, flags;
81 {
82 bus_space_tag_t iot = sc->sc_iot;
83 unsigned char flip_left[6] = {0x01, 0x01, 0x01, 0x02, 0x01, 0x02};
84 unsigned char flip_right[6] = {0x02, 0x02, 0x02, 0x01, 0x02, 0x01};
85 register unsigned char ctrl_addr;
86 register unsigned char attn_addr;
87 register unsigned char normal;
88 int s;
89
90 if (chan < ICSMIX_CHAN_0 || chan > ICSMIX_CHAN_5)
91 return;
92 if (side != ICSMIX_LEFT && side != ICSMIX_RIGHT)
93 return;
94
95 if (flags & ICS_MUTE) {
96 value = cvt_value(sc->sc_setting[chan][side]);
97 sc->sc_mute[chan][side] = flags & ICS_MUTE_MUTED;
98 } else if (flags & ICS_VALUE) {
99 sc->sc_setting[chan][side] = value;
100 value = cvt_value(value);
101 if (value > ICSMIX_MIN_ATTN)
102 value = ICSMIX_MIN_ATTN;
103 } else
104 return;
105
106 ctrl_addr = chan << 3;
107 attn_addr = chan << 3;
108
109 if (side == ICSMIX_LEFT) {
110 ctrl_addr |= ICSMIX_CTRL_LEFT;
111 attn_addr |= ICSMIX_ATTN_LEFT;
112 if (sc->sc_mute[chan][side])
113 normal = 0x0;
114 else if (sc->sc_flags & ICS_FLIP)
115 normal = flip_left[chan];
116 else
117 normal = 0x01;
118 } else {
119 ctrl_addr |= ICSMIX_CTRL_RIGHT;
120 attn_addr |= ICSMIX_ATTN_RIGHT;
121 if (sc->sc_mute[chan][side])
122 normal = 0x0;
123 else if (sc->sc_flags & ICS_FLIP)
124 normal = flip_right[chan];
125 else
126 normal = 0x02;
127 }
128
129 s = splaudio();
130
131 bus_space_write_1(iot, sc->sc_selio_ioh, sc->sc_selio, ctrl_addr);
132 bus_space_write_1(iot, sc->sc_dataio_ioh, sc->sc_dataio, normal);
133
134 bus_space_write_1(iot, sc->sc_selio_ioh, sc->sc_selio, attn_addr);
135 bus_space_write_1(iot, sc->sc_dataio_ioh, sc->sc_dataio, (unsigned char) value);
136
137 splx(s);
138 }
139
140 void
141 ics2101_mix_mute(sc, chan, side, domute)
142 struct ics2101_softc *sc;
143 unsigned int chan, side, domute;
144 {
145 ics2101_mix_doit(sc, chan, side, 0,
146 domute ? ICS_MUTE|ICS_MUTE_MUTED : ICS_MUTE);
147 }
148
149 void
150 ics2101_mix_attenuate(sc, chan, side, value)
151 struct ics2101_softc *sc;
152 unsigned int chan, side, value;
153 {
154 ics2101_mix_doit(sc, chan, side, value, ICS_VALUE);
155 }