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
23static 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
32static 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
47static 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
63static 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
82int 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