Annotation of sys/dev/isa/ics2101.c, Revision 1.1.1.1
1.1 nbrk 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: }
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