v4.19.13 snapshot.
diff --git a/sound/pci/emu10k1/emu10k1_synth.c b/sound/pci/emu10k1/emu10k1_synth.c
new file mode 100644
index 0000000..5457d56
--- /dev/null
+++ b/sound/pci/emu10k1/emu10k1_synth.c
@@ -0,0 +1,119 @@
+/*
+ * Copyright (C) 2000 Takashi Iwai <tiwai@suse.de>
+ *
+ * Routines for control of EMU10K1 WaveTable synth
+ *
+ * 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 "emu10k1_synth_local.h"
+#include <linux/init.h>
+#include <linux/module.h>
+
+MODULE_AUTHOR("Takashi Iwai");
+MODULE_DESCRIPTION("Routines for control of EMU10K1 WaveTable synth");
+MODULE_LICENSE("GPL");
+
+/*
+ * create a new hardware dependent device for Emu10k1
+ */
+static int snd_emu10k1_synth_probe(struct device *_dev)
+{
+ struct snd_seq_device *dev = to_seq_dev(_dev);
+ struct snd_emux *emux;
+ struct snd_emu10k1 *hw;
+ struct snd_emu10k1_synth_arg *arg;
+ unsigned long flags;
+
+ arg = SNDRV_SEQ_DEVICE_ARGPTR(dev);
+ if (arg == NULL)
+ return -EINVAL;
+
+ if (arg->seq_ports <= 0)
+ return 0; /* nothing */
+ if (arg->max_voices < 1)
+ arg->max_voices = 1;
+ else if (arg->max_voices > 64)
+ arg->max_voices = 64;
+
+ if (snd_emux_new(&emux) < 0)
+ return -ENOMEM;
+
+ snd_emu10k1_ops_setup(emux);
+ hw = arg->hwptr;
+ emux->hw = hw;
+ emux->max_voices = arg->max_voices;
+ emux->num_ports = arg->seq_ports;
+ emux->pitch_shift = -501;
+ emux->memhdr = hw->memhdr;
+ /* maximum two ports */
+ emux->midi_ports = arg->seq_ports < 2 ? arg->seq_ports : 2;
+ /* audigy has two external midis */
+ emux->midi_devidx = hw->audigy ? 2 : 1;
+ emux->linear_panning = 0;
+ emux->hwdep_idx = 2; /* FIXED */
+
+ if (snd_emux_register(emux, dev->card, arg->index, "Emu10k1") < 0) {
+ snd_emux_free(emux);
+ return -ENOMEM;
+ }
+
+ spin_lock_irqsave(&hw->voice_lock, flags);
+ hw->synth = emux;
+ hw->get_synth_voice = snd_emu10k1_synth_get_voice;
+ spin_unlock_irqrestore(&hw->voice_lock, flags);
+
+ dev->driver_data = emux;
+
+ return 0;
+}
+
+static int snd_emu10k1_synth_remove(struct device *_dev)
+{
+ struct snd_seq_device *dev = to_seq_dev(_dev);
+ struct snd_emux *emux;
+ struct snd_emu10k1 *hw;
+ unsigned long flags;
+
+ if (dev->driver_data == NULL)
+ return 0; /* not registered actually */
+
+ emux = dev->driver_data;
+
+ hw = emux->hw;
+ spin_lock_irqsave(&hw->voice_lock, flags);
+ hw->synth = NULL;
+ hw->get_synth_voice = NULL;
+ spin_unlock_irqrestore(&hw->voice_lock, flags);
+
+ snd_emux_free(emux);
+ return 0;
+}
+
+/*
+ * INIT part
+ */
+
+static struct snd_seq_driver emu10k1_synth_driver = {
+ .driver = {
+ .name = KBUILD_MODNAME,
+ .probe = snd_emu10k1_synth_probe,
+ .remove = snd_emu10k1_synth_remove,
+ },
+ .id = SNDRV_SEQ_DEV_ID_EMU10K1_SYNTH,
+ .argsize = sizeof(struct snd_emu10k1_synth_arg),
+};
+
+module_snd_seq_driver(emu10k1_synth_driver);