ALSA: fireworks: Add skelton for Fireworks based devices

This commit adds a new driver for devices based on Fireworks. This driver
just creates/removes card instance according to callbacks.

Fireworks is a board module which Echo Audio produced. This module
consists of three chipsets:
 - Communication chipset for IEEE1394 PHY/Link and IEC 61883-1/6
 - DSP or/and FPGA for signal processing
 - Flash Memory to store firmwares

Current supported devices:
 - Mackie Onyx 400F/1200F
 - Echo AudioFire12/8(until 2009 July)
 - Echo AudioFire2/4/Pre8/8(since 2009 July)
 - Echo Fireworks 8/HDMI
 - Gibson Robot Interface pack/GoldTop

Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
diff --git a/sound/firewire/fireworks/fireworks.h b/sound/firewire/fireworks/fireworks.h
new file mode 100644
index 0000000..9dfeb82
--- /dev/null
+++ b/sound/firewire/fireworks/fireworks.h
@@ -0,0 +1,41 @@
+/*
+ * fireworks.h - a part of driver for Fireworks based devices
+ *
+ * Copyright (c) 2009-2010 Clemens Ladisch
+ * Copyright (c) 2013-2014 Takashi Sakamoto
+ *
+ * Licensed under the terms of the GNU General Public License, version 2.
+ */
+#ifndef SOUND_FIREWORKS_H_INCLUDED
+#define SOUND_FIREWORKS_H_INCLUDED
+
+#include <linux/compat.h>
+#include <linux/device.h>
+#include <linux/firewire.h>
+#include <linux/firewire-constants.h>
+#include <linux/module.h>
+#include <linux/mod_devicetable.h>
+#include <linux/delay.h>
+#include <linux/slab.h>
+
+#include <sound/core.h>
+#include <sound/initval.h>
+
+struct snd_efw {
+	struct snd_card *card;
+	struct fw_unit *unit;
+	int card_index;
+
+	struct mutex mutex;
+	spinlock_t lock;
+};
+
+#define SND_EFW_DEV_ENTRY(vendor, model) \
+{ \
+	.match_flags	= IEEE1394_MATCH_VENDOR_ID | \
+			  IEEE1394_MATCH_MODEL_ID, \
+	.vendor_id	= vendor,\
+	.model_id	= model \
+}
+
+#endif