1 /*
2 * OPL4 mixer functions
3 * Copyright (c) 2003 by Clemens Ladisch <clemens@ladisch.de>
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18 */
19
20 #include "opl4_local.h"
21 #include <sound/control.h>
22
23 static int snd_opl4_ctl_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
24 {
25 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
26 uinfo->count = 2;
27 uinfo->value.integer.min = 0;
28 uinfo->value.integer.max = 7;
29 return 0;
30 }
31
32 static int snd_opl4_ctl_get(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
33 {
34 struct snd_opl4 *opl4 = snd_kcontrol_chip(kcontrol);
35 unsigned long flags;
36 u8 reg = kcontrol->private_value;
37 u8 value;
38
39 spin_lock_irqsave(&opl4->reg_lock, flags);
40 value = snd_opl4_read(opl4, reg);
41 spin_unlock_irqrestore(&opl4->reg_lock, flags);
42 ucontrol->value.integer.value[0] = 7 - (value & 7);
43 ucontrol->value.integer.value[1] = 7 - ((value >> 3) & 7);
44 return 0;
45 }
46
47 static int snd_opl4_ctl_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
48 {
49 struct snd_opl4 *opl4 = snd_kcontrol_chip(kcontrol);
50 unsigned long flags;
51 u8 reg = kcontrol->private_value;
52 u8 value, old_value;
53
54 value = (7 - (ucontrol->value.integer.value[0] & 7)) |
55 ((7 - (ucontrol->value.integer.value[1] & 7)) << 3);
56 spin_lock_irqsave(&opl4->reg_lock, flags);
57 old_value = snd_opl4_read(opl4, reg);
58 snd_opl4_write(opl4, reg, value);
59 spin_unlock_irqrestore(&opl4->reg_lock, flags);
60 return value != old_value;
61 }
62
63 static struct snd_kcontrol_new snd_opl4_controls[] = {
64 {
65 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
66 .name = "FM Playback Volume",
67 .info = snd_opl4_ctl_info,
68 .get = snd_opl4_ctl_get,
69 .put = snd_opl4_ctl_put,
70 .private_value = OPL4_REG_MIX_CONTROL_FM
71 },
72 {
73 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
74 .name = "Wavetable Playback Volume",
75 .info = snd_opl4_ctl_info,
76 .get = snd_opl4_ctl_get,
77 .put = snd_opl4_ctl_put,
78 .private_value = OPL4_REG_MIX_CONTROL_PCM
79 }
80 };
81
82 int snd_opl4_create_mixer(struct snd_opl4 *opl4)
83 {
84 struct snd_card *card = opl4->card;
85 int i, err;
86
87 strcat(card->mixername, ",OPL4");
88
89 for (i = 0; i < 2; ++i) {
90 err = snd_ctl_add(card, snd_ctl_new1(&snd_opl4_controls[i], opl4));
91 if (err < 0)
92 return err;
93 }
94 return 0;
95 }
96
|
This page was automatically generated by the
LXR engine.
|