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Viewing changes to sound/drivers/opl4/opl4_mixer.c

  • Committer: Package Import Robot
  • Author(s): Alessio Igor Bogani
  • Date: 2011-10-26 11:13:05 UTC
  • Revision ID: package-import@ubuntu.com-20111026111305-tz023xykf0i6eosh
Tags: upstream-3.2.0
Import upstream version 3.2.0

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sound/drivers/opl4/opl4_mixer.c
 
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/*
 
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 * OPL4 mixer functions
 
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 * Copyright (c) 2003 by Clemens Ladisch <clemens@ladisch.de>
 
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 *
 
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 * This program is free software; you can redistribute it and/or modify
 
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 * it under the terms of the GNU General Public License as published by
 
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 * the Free Software Foundation; either version 2 of the License, or
 
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 * (at your option) any later version.
 
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 *
 
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 * This program is distributed in the hope that it will be useful,
 
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 
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 * GNU General Public License for more details.
 
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 *
 
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 * You should have received a copy of the GNU General Public License
 
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 * along with this program; if not, write to the Free Software
 
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 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
 
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 */
 
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#include "opl4_local.h"
 
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#include <sound/control.h>
 
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static int snd_opl4_ctl_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
 
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{
 
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        uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
 
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        uinfo->count = 2;
 
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        uinfo->value.integer.min = 0;
 
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        uinfo->value.integer.max = 7;
 
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        return 0;
 
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}
 
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static int snd_opl4_ctl_get(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
 
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{
 
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        struct snd_opl4 *opl4 = snd_kcontrol_chip(kcontrol);
 
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        unsigned long flags;
 
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        u8 reg = kcontrol->private_value;
 
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        u8 value;
 
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        spin_lock_irqsave(&opl4->reg_lock, flags);
 
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        value = snd_opl4_read(opl4, reg);
 
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        spin_unlock_irqrestore(&opl4->reg_lock, flags);
 
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        ucontrol->value.integer.value[0] = 7 - (value & 7);
 
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        ucontrol->value.integer.value[1] = 7 - ((value >> 3) & 7);
 
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        return 0;
 
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}
 
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static int snd_opl4_ctl_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
 
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{
 
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        struct snd_opl4 *opl4 = snd_kcontrol_chip(kcontrol);
 
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        unsigned long flags;
 
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        u8 reg = kcontrol->private_value;
 
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        u8 value, old_value;
 
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        value = (7 - (ucontrol->value.integer.value[0] & 7)) |
 
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                ((7 - (ucontrol->value.integer.value[1] & 7)) << 3);
 
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        spin_lock_irqsave(&opl4->reg_lock, flags);
 
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        old_value = snd_opl4_read(opl4, reg);
 
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        snd_opl4_write(opl4, reg, value);
 
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        spin_unlock_irqrestore(&opl4->reg_lock, flags);
 
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        return value != old_value;
 
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}
 
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static struct snd_kcontrol_new snd_opl4_controls[] = {
 
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        {
 
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                .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
 
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                .name = "FM Playback Volume",
 
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                .info = snd_opl4_ctl_info,
 
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                .get = snd_opl4_ctl_get,
 
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                .put = snd_opl4_ctl_put,
 
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                .private_value = OPL4_REG_MIX_CONTROL_FM
 
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        },
 
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        {
 
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                .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
 
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                .name = "Wavetable Playback Volume",
 
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                .info = snd_opl4_ctl_info,
 
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                .get = snd_opl4_ctl_get,
 
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                .put = snd_opl4_ctl_put,
 
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                .private_value = OPL4_REG_MIX_CONTROL_PCM
 
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        }
 
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};
 
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int snd_opl4_create_mixer(struct snd_opl4 *opl4)
 
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{
 
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        struct snd_card *card = opl4->card;
 
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        int i, err;
 
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        strcat(card->mixername, ",OPL4");
 
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        for (i = 0; i < 2; ++i) {
 
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                err = snd_ctl_add(card, snd_ctl_new1(&snd_opl4_controls[i], opl4));
 
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                if (err < 0)
 
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                        return err;
 
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        }
 
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        return 0;
 
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}