1 | // SPDX-License-Identifier: GPL-2.0-or-later |
2 | /* |
3 | * OPL4 mixer functions |
4 | * Copyright (c) 2003 by Clemens Ladisch <clemens@ladisch.de> |
5 | */ |
6 | |
7 | #include "opl4_local.h" |
8 | #include <sound/control.h> |
9 | |
10 | static int snd_opl4_ctl_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo) |
11 | { |
12 | uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; |
13 | uinfo->count = 2; |
14 | uinfo->value.integer.min = 0; |
15 | uinfo->value.integer.max = 7; |
16 | return 0; |
17 | } |
18 | |
19 | static int snd_opl4_ctl_get(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol) |
20 | { |
21 | struct snd_opl4 *opl4 = snd_kcontrol_chip(kcontrol); |
22 | unsigned long flags; |
23 | u8 reg = kcontrol->private_value; |
24 | u8 value; |
25 | |
26 | spin_lock_irqsave(&opl4->reg_lock, flags); |
27 | value = snd_opl4_read(opl4, reg); |
28 | spin_unlock_irqrestore(lock: &opl4->reg_lock, flags); |
29 | ucontrol->value.integer.value[0] = 7 - (value & 7); |
30 | ucontrol->value.integer.value[1] = 7 - ((value >> 3) & 7); |
31 | return 0; |
32 | } |
33 | |
34 | static int snd_opl4_ctl_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol) |
35 | { |
36 | struct snd_opl4 *opl4 = snd_kcontrol_chip(kcontrol); |
37 | unsigned long flags; |
38 | u8 reg = kcontrol->private_value; |
39 | u8 value, old_value; |
40 | |
41 | value = (7 - (ucontrol->value.integer.value[0] & 7)) | |
42 | ((7 - (ucontrol->value.integer.value[1] & 7)) << 3); |
43 | spin_lock_irqsave(&opl4->reg_lock, flags); |
44 | old_value = snd_opl4_read(opl4, reg); |
45 | snd_opl4_write(opl4, reg, value); |
46 | spin_unlock_irqrestore(lock: &opl4->reg_lock, flags); |
47 | return value != old_value; |
48 | } |
49 | |
50 | static const struct snd_kcontrol_new snd_opl4_controls[] = { |
51 | { |
52 | .iface = SNDRV_CTL_ELEM_IFACE_MIXER, |
53 | .name = "FM Playback Volume" , |
54 | .info = snd_opl4_ctl_info, |
55 | .get = snd_opl4_ctl_get, |
56 | .put = snd_opl4_ctl_put, |
57 | .private_value = OPL4_REG_MIX_CONTROL_FM |
58 | }, |
59 | { |
60 | .iface = SNDRV_CTL_ELEM_IFACE_MIXER, |
61 | .name = "Wavetable Playback Volume" , |
62 | .info = snd_opl4_ctl_info, |
63 | .get = snd_opl4_ctl_get, |
64 | .put = snd_opl4_ctl_put, |
65 | .private_value = OPL4_REG_MIX_CONTROL_PCM |
66 | } |
67 | }; |
68 | |
69 | int snd_opl4_create_mixer(struct snd_opl4 *opl4) |
70 | { |
71 | struct snd_card *card = opl4->card; |
72 | int i, err; |
73 | |
74 | strcat(p: card->mixername, q: ",OPL4" ); |
75 | |
76 | for (i = 0; i < 2; ++i) { |
77 | err = snd_ctl_add(card, kcontrol: snd_ctl_new1(kcontrolnew: &snd_opl4_controls[i], private_data: opl4)); |
78 | if (err < 0) |
79 | return err; |
80 | } |
81 | return 0; |
82 | } |
83 | |