1 /* $NetBSD: ics2101.c,v 1.17 2011/11/23 23:07:32 jmcneill 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 1.17 2011/11/23 23:07:32 jmcneill 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
ics2101_mix_doit(struct ics2101_softc * sc,u_int chan,u_int side,u_int value,u_int flags)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
82 if (/* chan < ICSMIX_CHAN_0 || */ chan > ICSMIX_CHAN_5)
83 return;
84 if (side != ICSMIX_LEFT && side != ICSMIX_RIGHT)
85 return;
86
87 if (flags & ICS_MUTE) {
88 value = cvt_value(sc->sc_setting[chan][side]);
89 sc->sc_mute[chan][side] = flags & ICS_MUTE_MUTED;
90 } else if (flags & ICS_VALUE) {
91 sc->sc_setting[chan][side] = value;
92 value = cvt_value(value);
93 if (value > ICSMIX_MIN_ATTN)
94 value = ICSMIX_MIN_ATTN;
95 } else
96 return;
97
98 ctrl_addr = chan << 3;
99 attn_addr = chan << 3;
100
101 if (side == ICSMIX_LEFT) {
102 ctrl_addr |= ICSMIX_CTRL_LEFT;
103 attn_addr |= ICSMIX_ATTN_LEFT;
104 if (sc->sc_mute[chan][side])
105 normal = 0x0;
106 else if (sc->sc_flags & ICS_FLIP)
107 normal = flip_left[chan];
108 else
109 normal = 0x01;
110 } else {
111 ctrl_addr |= ICSMIX_CTRL_RIGHT;
112 attn_addr |= ICSMIX_ATTN_RIGHT;
113 if (sc->sc_mute[chan][side])
114 normal = 0x0;
115 else if (sc->sc_flags & ICS_FLIP)
116 normal = flip_right[chan];
117 else
118 normal = 0x02;
119 }
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
128 void
ics2101_mix_mute(struct ics2101_softc * sc,unsigned int chan,unsigned int side,unsigned int domute)129 ics2101_mix_mute(struct ics2101_softc *sc, unsigned int chan, unsigned int side, unsigned int domute)
130 {
131 ics2101_mix_doit(sc, chan, side, 0,
132 domute ? ICS_MUTE|ICS_MUTE_MUTED : ICS_MUTE);
133 }
134
135 void
ics2101_mix_attenuate(struct ics2101_softc * sc,unsigned int chan,unsigned int side,unsigned int value)136 ics2101_mix_attenuate(struct ics2101_softc *sc, unsigned int chan, unsigned int side, unsigned int value)
137 {
138 ics2101_mix_doit(sc, chan, side, value, ICS_VALUE);
139 }
140