1 /* $OpenBSD: ics2101.c,v 1.10 2021/03/07 06:17:03 jsg 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 *
20 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
22 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
23 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
24 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
30 * POSSIBILITY OF SUCH DAMAGE.
31 */
32
33 #include <sys/param.h>
34 #include <sys/systm.h>
35 #include <sys/errno.h>
36 #include <sys/ioctl.h>
37 #include <sys/syslog.h>
38 #include <sys/device.h>
39 #include <sys/buf.h>
40
41 #include <machine/cpu.h>
42
43 #include <sys/audioio.h>
44 #include <dev/audio_if.h>
45
46 #include <dev/isa/isavar.h>
47 #include <dev/isa/isadmavar.h>
48
49 #include <dev/ic/ics2101reg.h>
50 #include <dev/isa/ics2101var.h>
51
52
53 #define ICS_VALUE 0x01
54 #define ICS_MUTE 0x02
55 #define ICS_MUTE_MUTED 0x04
56
57 /* convert from [AUDIO_MIN_GAIN,AUDIO_MAX_GAIN] (0,255) to
58 [ICSMIX_MAX_ATTN,ICSMIX_MIN_ATTN] (0,127) */
59
60 #define cvt_value(val) ((val) >> 1)
61
62 static void ics2101_mix_doit(struct ics2101_softc *, u_int, u_int, u_int,
63 u_int);
64 /*
65 * Program one channel of the ICS mixer
66 */
67
68
69 static void
ics2101_mix_doit(struct ics2101_softc * sc,u_int chan,u_int side,u_int value,u_int flags)70 ics2101_mix_doit(struct ics2101_softc *sc, u_int chan, u_int side, u_int value,
71 u_int flags)
72 {
73 bus_space_tag_t iot = sc->sc_iot;
74 unsigned char flip_left[6] = {0x01, 0x01, 0x01, 0x02, 0x01, 0x02};
75 unsigned char flip_right[6] = {0x02, 0x02, 0x02, 0x01, 0x02, 0x01};
76 register unsigned char ctrl_addr;
77 register unsigned char attn_addr;
78 register unsigned char normal;
79
80 if (chan < ICSMIX_CHAN_0 || chan > ICSMIX_CHAN_5)
81 return;
82 if (side != ICSMIX_LEFT && side != ICSMIX_RIGHT)
83 return;
84
85 if (flags & ICS_MUTE) {
86 value = cvt_value(sc->sc_setting[chan][side]);
87 sc->sc_mute[chan][side] = flags & ICS_MUTE_MUTED;
88 } else if (flags & ICS_VALUE) {
89 sc->sc_setting[chan][side] = value;
90 value = cvt_value(value);
91 if (value > ICSMIX_MIN_ATTN)
92 value = ICSMIX_MIN_ATTN;
93 } else
94 return;
95
96 ctrl_addr = chan << 3;
97 attn_addr = chan << 3;
98
99 if (side == ICSMIX_LEFT) {
100 ctrl_addr |= ICSMIX_CTRL_LEFT;
101 attn_addr |= ICSMIX_ATTN_LEFT;
102 if (sc->sc_mute[chan][side])
103 normal = 0x0;
104 else if (sc->sc_flags & ICS_FLIP)
105 normal = flip_left[chan];
106 else
107 normal = 0x01;
108 } else {
109 ctrl_addr |= ICSMIX_CTRL_RIGHT;
110 attn_addr |= ICSMIX_ATTN_RIGHT;
111 if (sc->sc_mute[chan][side])
112 normal = 0x0;
113 else if (sc->sc_flags & ICS_FLIP)
114 normal = flip_right[chan];
115 else
116 normal = 0x02;
117 }
118
119 mtx_enter(&audio_lock);
120
121 bus_space_write_1(iot, sc->sc_selio_ioh, sc->sc_selio, ctrl_addr);
122 bus_space_write_1(iot, sc->sc_dataio_ioh, sc->sc_dataio, normal);
123
124 bus_space_write_1(iot, sc->sc_selio_ioh, sc->sc_selio, attn_addr);
125 bus_space_write_1(iot, sc->sc_dataio_ioh, sc->sc_dataio, (unsigned char) value);
126
127 mtx_leave(&audio_lock);
128 }
129
130 void
ics2101_mix_mute(struct ics2101_softc * sc,unsigned int chan,unsigned int side,unsigned int domute)131 ics2101_mix_mute(struct ics2101_softc *sc, unsigned int chan, unsigned int side,
132 unsigned int domute)
133 {
134 ics2101_mix_doit(sc, chan, side, 0,
135 domute ? ICS_MUTE|ICS_MUTE_MUTED : ICS_MUTE);
136 }
137
138 void
ics2101_mix_attenuate(struct ics2101_softc * sc,unsigned int chan,unsigned int side,unsigned int value)139 ics2101_mix_attenuate(struct ics2101_softc *sc, unsigned int chan,
140 unsigned int side, unsigned int value)
141 {
142 ics2101_mix_doit(sc, chan, side, value, ICS_VALUE);
143 }
144