Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / sound / drivers / opl4 / opl4_mixer.c

diff --git a/kernel/sound/drivers/opl4/opl4_mixer.c b/kernel/sound/drivers/opl4/opl4_mixer.c
new file mode 100644 (file)
index 0000000..04079de
--- /dev/null
+++ b/kernel/sound/drivers/opl4/opl4_mixer.c
@@ -0,0 +1,95 @@
+/*
+ * OPL4 mixer functions
+ * Copyright (c) 2003 by Clemens Ladisch <clemens@ladisch.de>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
+ */
+
+#include "opl4_local.h"
+#include <sound/control.h>
+
+static int snd_opl4_ctl_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
+{
+       uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
+       uinfo->count = 2;
+       uinfo->value.integer.min = 0;
+       uinfo->value.integer.max = 7;
+       return 0;
+}
+
+static int snd_opl4_ctl_get(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
+{
+       struct snd_opl4 *opl4 = snd_kcontrol_chip(kcontrol);
+       unsigned long flags;
+       u8 reg = kcontrol->private_value;
+       u8 value;
+
+       spin_lock_irqsave(&opl4->reg_lock, flags);
+       value = snd_opl4_read(opl4, reg);
+       spin_unlock_irqrestore(&opl4->reg_lock, flags);
+       ucontrol->value.integer.value[0] = 7 - (value & 7);
+       ucontrol->value.integer.value[1] = 7 - ((value >> 3) & 7);
+       return 0;
+}
+
+static int snd_opl4_ctl_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
+{
+       struct snd_opl4 *opl4 = snd_kcontrol_chip(kcontrol);
+       unsigned long flags;
+       u8 reg = kcontrol->private_value;
+       u8 value, old_value;
+
+       value = (7 - (ucontrol->value.integer.value[0] & 7)) |
+               ((7 - (ucontrol->value.integer.value[1] & 7)) << 3);
+       spin_lock_irqsave(&opl4->reg_lock, flags);
+       old_value = snd_opl4_read(opl4, reg);
+       snd_opl4_write(opl4, reg, value);
+       spin_unlock_irqrestore(&opl4->reg_lock, flags);
+       return value != old_value;
+}
+
+static struct snd_kcontrol_new snd_opl4_controls[] = {
+       {
+               .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
+               .name = "FM Playback Volume",
+               .info = snd_opl4_ctl_info,
+               .get = snd_opl4_ctl_get,
+               .put = snd_opl4_ctl_put,
+               .private_value = OPL4_REG_MIX_CONTROL_FM
+       },
+       {
+               .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
+               .name = "Wavetable Playback Volume",
+               .info = snd_opl4_ctl_info,
+               .get = snd_opl4_ctl_get,
+               .put = snd_opl4_ctl_put,
+               .private_value = OPL4_REG_MIX_CONTROL_PCM
+       }
+};
+
+int snd_opl4_create_mixer(struct snd_opl4 *opl4)
+{
+       struct snd_card *card = opl4->card;
+       int i, err;
+
+       strcat(card->mixername, ",OPL4");
+
+       for (i = 0; i < 2; ++i) {
+               err = snd_ctl_add(card, snd_ctl_new1(&snd_opl4_controls[i], opl4));
+               if (err < 0)
+                       return err;
+       }
+       return 0;
+}