Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

10 files changed, 2847 insertions, 0 deletions

diff --git a/sound/usb/usx2y/Makefile b/sound/usb/usx2y/Makefile
new file mode 100644
index 00000000000..9ac22bce112
--- /dev/null
+++ b/sound/usb/usx2y/Makefile
@@ -0,0 +1,3 @@
+snd-usb-usx2y-objs := usbusx2y.o usX2Yhwdep.o usx2yhwdeppcm.o
+
+obj-$(CONFIG_SND_USB_USX2Y) += snd-usb-usx2y.o
diff --git a/sound/usb/usx2y/usX2Yhwdep.c b/sound/usb/usx2y/usX2Yhwdep.c
new file mode 100644
index 00000000000..bef9b0c142c
--- /dev/null
+++ b/sound/usb/usx2y/usX2Yhwdep.c
@@ -0,0 +1,280 @@
+/*
+ * Driver for Tascam US-X2Y USB soundcards
+ *
+ * FPGA Loader + ALSA Startup
+ *
+ * Copyright (c) 2003 by Karsten Wiese <annabellesgarden@yahoo.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 <sound/driver.h>
+#include <linux/interrupt.h>
+#include <linux/usb.h>
+#include <sound/core.h>
+#include <sound/memalloc.h>
+#include <sound/pcm.h>
+#include <sound/hwdep.h>
+#include "usx2y.h"
+#include "usbusx2y.h"
+#include "usX2Yhwdep.h"
+
+int usX2Y_hwdep_pcm_new(snd_card_t* card);
+
+
+static struct page * snd_us428ctls_vm_nopage(struct vm_area_struct *area, unsigned long address, int *type)
+{
+	unsigned long offset;
+	struct page * page;
+	void *vaddr;
+
+	snd_printdd("ENTER, start %lXh, ofs %lXh, pgoff %ld, addr %lXh\n",
+		   area->vm_start,
+		   address - area->vm_start,
+		   (address - area->vm_start) >> PAGE_SHIFT,
+		   address);
+	
+	offset = area->vm_pgoff << PAGE_SHIFT;
+	offset += address - area->vm_start;
+	snd_assert((offset % PAGE_SIZE) == 0, return NOPAGE_OOM);
+	vaddr = (char*)((usX2Ydev_t*)area->vm_private_data)->us428ctls_sharedmem + offset;
+	page = virt_to_page(vaddr);
+	get_page(page);
+	snd_printdd( "vaddr=%p made us428ctls_vm_nopage() return %p; offset=%lX\n", vaddr, page, offset);
+
+	if (type)
+		*type = VM_FAULT_MINOR;
+
+	return page;
+}
+
+static struct vm_operations_struct us428ctls_vm_ops = {
+	.nopage = snd_us428ctls_vm_nopage,
+};
+
+static int snd_us428ctls_mmap(snd_hwdep_t * hw, struct file *filp, struct vm_area_struct *area)
+{
+	unsigned long	size = (unsigned long)(area->vm_end - area->vm_start);
+	usX2Ydev_t	*us428 = (usX2Ydev_t*)hw->private_data;
+
+	// FIXME this hwdep interface is used twice: fpga download and mmap for controlling Lights etc. Maybe better using 2 hwdep devs?
+	// so as long as the device isn't fully initialised yet we return -EBUSY here.
+ 	if (!(((usX2Ydev_t*)hw->private_data)->chip_status & USX2Y_STAT_CHIP_INIT))
+		return -EBUSY;
+
+	/* if userspace tries to mmap beyond end of our buffer, fail */ 
+        if (size > ((PAGE_SIZE - 1 + sizeof(us428ctls_sharedmem_t)) / PAGE_SIZE) * PAGE_SIZE) {
+		snd_printd( "%lu > %lu\n", size, (unsigned long)sizeof(us428ctls_sharedmem_t)); 
+                return -EINVAL;
+	}
+
+	if (!us428->us428ctls_sharedmem) {
+		init_waitqueue_head(&us428->us428ctls_wait_queue_head);
+		if(!(us428->us428ctls_sharedmem = snd_malloc_pages(sizeof(us428ctls_sharedmem_t), GFP_KERNEL)))
+			return -ENOMEM;
+		memset(us428->us428ctls_sharedmem, -1, sizeof(us428ctls_sharedmem_t));
+		us428->us428ctls_sharedmem->CtlSnapShotLast = -2;
+	}
+	area->vm_ops = &us428ctls_vm_ops;
+	area->vm_flags |= VM_RESERVED;
+	area->vm_private_data = hw->private_data;
+	return 0;
+}
+
+static unsigned int snd_us428ctls_poll(snd_hwdep_t *hw, struct file *file, poll_table *wait)
+{
+	unsigned int	mask = 0;
+	usX2Ydev_t	*us428 = (usX2Ydev_t*)hw->private_data;
+	us428ctls_sharedmem_t *shm = us428->us428ctls_sharedmem;
+	if (us428->chip_status & USX2Y_STAT_CHIP_HUP)
+		return POLLHUP;
+
+	poll_wait(file, &us428->us428ctls_wait_queue_head, wait);
+
+	if (shm != NULL && shm->CtlSnapShotLast != shm->CtlSnapShotRed)
+		mask |= POLLIN;
+
+	return mask;
+}
+
+
+static int snd_usX2Y_hwdep_open(snd_hwdep_t *hw, struct file *file)
+{
+	return 0;
+}
+
+static int snd_usX2Y_hwdep_release(snd_hwdep_t *hw, struct file *file)
+{
+	return 0;
+}
+
+static int snd_usX2Y_hwdep_dsp_status(snd_hwdep_t *hw, snd_hwdep_dsp_status_t *info)
+{
+	static char *type_ids[USX2Y_TYPE_NUMS] = {
+		[USX2Y_TYPE_122] = "us122",
+		[USX2Y_TYPE_224] = "us224",
+		[USX2Y_TYPE_428] = "us428",
+	};
+	int id = -1;
+
+	switch (le16_to_cpu(((usX2Ydev_t*)hw->private_data)->chip.dev->descriptor.idProduct)) {
+	case USB_ID_US122:
+		id = USX2Y_TYPE_122;
+		break;
+	case USB_ID_US224:
+		id = USX2Y_TYPE_224;
+		break;
+	case USB_ID_US428:
+		id = USX2Y_TYPE_428;
+		break;
+	}
+	if (0 > id)
+		return -ENODEV;
+	strcpy(info->id, type_ids[id]);
+	info->num_dsps = 2;		// 0: Prepad Data, 1: FPGA Code
+ 	if (((usX2Ydev_t*)hw->private_data)->chip_status & USX2Y_STAT_CHIP_INIT) 
+		info->chip_ready = 1;
+ 	info->version = USX2Y_DRIVER_VERSION; 
+	return 0;
+}
+
+
+static int usX2Y_create_usbmidi(snd_card_t* card )
+{
+	static snd_usb_midi_endpoint_info_t quirk_data_1 = {
+		.out_ep =0x06,
+		.in_ep = 0x06,
+		.out_cables =	0x001,
+		.in_cables =	0x001
+	};
+	static snd_usb_audio_quirk_t quirk_1 = {
+		.vendor_name =	"TASCAM",
+		.product_name =	NAME_ALLCAPS,
+		.ifnum = 	0,
+       		.type = QUIRK_MIDI_FIXED_ENDPOINT,
+		.data = &quirk_data_1
+	};
+	static snd_usb_midi_endpoint_info_t quirk_data_2 = {
+		.out_ep =0x06,
+		.in_ep = 0x06,
+		.out_cables =	0x003,
+		.in_cables =	0x003
+	};
+	static snd_usb_audio_quirk_t quirk_2 = {
+		.vendor_name =	"TASCAM",
+		.product_name =	"US428",
+		.ifnum = 	0,
+       		.type = QUIRK_MIDI_FIXED_ENDPOINT,
+		.data = &quirk_data_2
+	};
+	struct usb_device *dev = usX2Y(card)->chip.dev;
+	struct usb_interface *iface = usb_ifnum_to_if(dev, 0);
+	snd_usb_audio_quirk_t *quirk = le16_to_cpu(dev->descriptor.idProduct) == USB_ID_US428 ? &quirk_2 : &quirk_1;
+
+	snd_printdd("usX2Y_create_usbmidi \n");
+	return snd_usb_create_midi_interface(&usX2Y(card)->chip, iface, quirk);
+}
+
+static int usX2Y_create_alsa_devices(snd_card_t* card)
+{
+	int err;
+
+	do {
+		if ((err = usX2Y_create_usbmidi(card)) < 0) {
+			snd_printk("usX2Y_create_alsa_devices: usX2Y_create_usbmidi error %i \n", err);
+			break;
+		}
+		if ((err = usX2Y_audio_create(card)) < 0) 
+			break;
+		if ((err = usX2Y_hwdep_pcm_new(card)) < 0)
+			break;
+		if ((err = snd_card_register(card)) < 0)
+			break;
+	} while (0);
+
+	return err;
+} 
+
+static int snd_usX2Y_hwdep_dsp_load(snd_hwdep_t *hw, snd_hwdep_dsp_image_t *dsp)
+{
+	usX2Ydev_t *priv = hw->private_data;
+	int	lret, err = -EINVAL;
+	snd_printdd( "dsp_load %s\n", dsp->name);
+
+	if (access_ok(VERIFY_READ, dsp->image, dsp->length)) {
+		struct usb_device* dev = priv->chip.dev;
+		char *buf = kmalloc(dsp->length, GFP_KERNEL);
+		if (!buf)
+			return -ENOMEM;
+		if (copy_from_user(buf, dsp->image, dsp->length)) {
+			kfree(buf);
+			return -EFAULT;
+		}
+		err = usb_set_interface(dev, 0, 1);
+		if (err)
+			snd_printk("usb_set_interface error \n");
+		else
+			err = usb_bulk_msg(dev, usb_sndbulkpipe(dev, 2), buf, dsp->length, &lret, 6000);
+		kfree(buf);
+	}
+	if (err)
+		return err;
+	if (dsp->index == 1) {
+		set_current_state(TASK_UNINTERRUPTIBLE);
+		schedule_timeout(HZ/4);			// give the device some time 
+		err = usX2Y_AsyncSeq04_init(priv);
+		if (err) {
+			snd_printk("usX2Y_AsyncSeq04_init error \n");
+			return err;
+		}
+		err = usX2Y_In04_init(priv);
+		if (err) {
+			snd_printk("usX2Y_In04_init error \n");
+			return err;
+		}
+		err = usX2Y_create_alsa_devices(hw->card);
+		if (err) {
+			snd_printk("usX2Y_create_alsa_devices error %i \n", err);
+			snd_card_free(hw->card);
+			return err;
+		}
+		priv->chip_status |= USX2Y_STAT_CHIP_INIT; 
+		snd_printdd("%s: alsa all started\n", hw->name);
+	}
+	return err;
+}
+
+
+int usX2Y_hwdep_new(snd_card_t* card, struct usb_device* device)
+{
+	int err;
+	snd_hwdep_t *hw;
+
+	if ((err = snd_hwdep_new(card, SND_USX2Y_LOADER_ID, 0, &hw)) < 0)
+		return err;
+
+	hw->iface = SNDRV_HWDEP_IFACE_USX2Y;
+	hw->private_data = usX2Y(card);
+	hw->ops.open = snd_usX2Y_hwdep_open;
+	hw->ops.release = snd_usX2Y_hwdep_release;
+	hw->ops.dsp_status = snd_usX2Y_hwdep_dsp_status;
+	hw->ops.dsp_load = snd_usX2Y_hwdep_dsp_load;
+	hw->ops.mmap = snd_us428ctls_mmap;
+	hw->ops.poll = snd_us428ctls_poll;
+	hw->exclusive = 1;
+	sprintf(hw->name, "/proc/bus/usb/%03d/%03d", device->bus->busnum, device->devnum);
+	return 0;
+}
+
diff --git a/sound/usb/usx2y/usX2Yhwdep.h b/sound/usb/usx2y/usX2Yhwdep.h
new file mode 100644
index 00000000000..d612a26eb77
--- /dev/null
+++ b/sound/usb/usx2y/usX2Yhwdep.h
@@ -0,0 +1,6 @@
+#ifndef USX2YHWDEP_H
+#define USX2YHWDEP_H
+
+int usX2Y_hwdep_new(snd_card_t* card, struct usb_device* device);
+
+#endif
diff --git a/sound/usb/usx2y/usbus428ctldefs.h b/sound/usb/usx2y/usbus428ctldefs.h
new file mode 100644
index 00000000000..6af16438d2c
--- /dev/null
+++ b/sound/usb/usx2y/usbus428ctldefs.h
@@ -0,0 +1,108 @@
+/*
+ *
+ * Copyright (c) 2003 by Karsten Wiese <annabellesgarden@yahoo.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
+ */
+
+enum E_In84{
+	eFader0 = 0,
+	eFader1,
+	eFader2,
+	eFader3,
+	eFader4,
+	eFader5,
+	eFader6,
+	eFader7,
+	eFaderM,
+	eTransport,
+	eModifier = 10,
+	eFilterSelect,
+	eSelect,
+	eMute,
+
+	eSwitch   = 15,
+	eWheelGain,
+	eWheelFreq,
+	eWheelQ,
+	eWheelPan,
+	eWheel    = 20
+};
+
+#define T_RECORD   1
+#define T_PLAY     2
+#define T_STOP     4
+#define T_F_FWD    8
+#define T_REW   0x10
+#define T_SOLO  0x20
+#define T_REC   0x40
+#define T_NULL  0x80
+
+
+struct us428_ctls{
+	unsigned char   Fader[9];
+	unsigned char 	Transport;
+	unsigned char 	Modifier;
+	unsigned char 	FilterSelect;
+	unsigned char 	Select;
+	unsigned char   Mute;
+	unsigned char   UNKNOWN;
+	unsigned char   Switch;	     
+	unsigned char   Wheel[5];
+};
+
+typedef struct us428_ctls us428_ctls_t;
+
+typedef struct us428_setByte{
+	unsigned char Offset,
+		Value;
+}us428_setByte_t;
+
+enum {
+	eLT_Volume = 0,
+	eLT_Light
+};
+
+typedef struct usX2Y_volume {
+	unsigned char Channel,
+		LH,
+		LL,
+		RH,
+		RL;
+} usX2Y_volume_t;
+
+struct us428_lights{
+	us428_setByte_t Light[7];
+};
+typedef struct us428_lights us428_lights_t;
+
+typedef struct {
+	char type;
+	union {
+		usX2Y_volume_t	vol;
+		us428_lights_t  lights;
+	} val;
+} us428_p4out_t;
+
+#define N_us428_ctl_BUFS 16
+#define N_us428_p4out_BUFS 16
+struct us428ctls_sharedmem{
+	us428_ctls_t	CtlSnapShot[N_us428_ctl_BUFS];
+	int		CtlSnapShotDiffersAt[N_us428_ctl_BUFS];
+	int		CtlSnapShotLast, CtlSnapShotRed;
+	us428_p4out_t	p4out[N_us428_p4out_BUFS];
+	int		p4outLast, p4outSent;
+};
+typedef struct us428ctls_sharedmem us428ctls_sharedmem_t;
diff --git a/sound/usb/usx2y/usbusx2y.c b/sound/usb/usx2y/usbusx2y.c
new file mode 100644
index 00000000000..b06a267e5da
--- /dev/null
+++ b/sound/usb/usx2y/usbusx2y.c
@@ -0,0 +1,461 @@
+/*
+ * usbusy2y.c - ALSA USB US-428 Driver
+ *
+2004-12-14 Karsten Wiese
+	Version 0.8.7.1:
+	snd_pcm_open for rawusb pcm-devices now returns -EBUSY if called without rawusb's hwdep device being open.
+
+2004-12-02 Karsten Wiese
+	Version 0.8.7:
+	Use macro usb_maxpacket() for portability.
+
+2004-10-26 Karsten Wiese
+	Version 0.8.6:
+	wake_up() process waiting in usX2Y_urbs_start() on error.
+
+2004-10-21 Karsten Wiese
+	Version 0.8.5:
+	nrpacks is runtime or compiletime configurable now with tested values from 1 to 4.
+
+2004-10-03 Karsten Wiese
+	Version 0.8.2:
+	Avoid any possible racing while in prepare callback.
+
+2004-09-30 Karsten Wiese
+	Version 0.8.0:
+	Simplified things and made ohci work again.
+
+2004-09-20 Karsten Wiese
+	Version 0.7.3:
+	Use usb_kill_urb() instead of deprecated (kernel 2.6.9) usb_unlink_urb().
+
+2004-07-13 Karsten Wiese
+	Version 0.7.1:
+	Don't sleep in START/STOP callbacks anymore.
+	us428 channels C/D not handled just for this version, sorry.
+
+2004-06-21 Karsten Wiese
+	Version 0.6.4:
+	Temporarely suspend midi input
+	to sanely call usb_set_interface() when setting format.
+
+2004-06-12 Karsten Wiese
+	Version 0.6.3:
+	Made it thus the following rule is enforced:
+	"All pcm substreams of one usX2Y have to operate at the same rate & format."
+
+2004-04-06 Karsten Wiese
+	Version 0.6.0:
+	Runs on 2.6.5 kernel without any "--with-debug=" things.
+	us224 reported running.
+
+2004-01-14 Karsten Wiese
+	Version 0.5.1:
+	Runs with 2.6.1 kernel.
+
+2003-12-30 Karsten Wiese
+	Version 0.4.1:
+	Fix 24Bit 4Channel capturing for the us428.
+
+2003-11-27 Karsten Wiese, Martin Langer
+	Version 0.4:
+	us122 support.
+	us224 could be tested by uncommenting the sections containing USB_ID_US224
+
+2003-11-03 Karsten Wiese
+	Version 0.3:
+	24Bit support. 
+	"arecord -D hw:1 -c 2 -r 48000 -M -f S24_3LE|aplay -D hw:1 -c 2 -r 48000 -M -f S24_3LE" works.
+
+2003-08-22 Karsten Wiese
+	Version 0.0.8:
+	Removed EZUSB Firmware. First Stage Firmwaredownload is now done by tascam-firmware downloader.
+	See:
+	http://usb-midi-fw.sourceforge.net/tascam-firmware.tar.gz
+
+2003-06-18 Karsten Wiese
+	Version 0.0.5:
+	changed to compile with kernel 2.4.21 and alsa 0.9.4
+
+2002-10-16 Karsten Wiese
+	Version 0.0.4:
+	compiles again with alsa-current.
+	USB_ISO_ASAP not used anymore (most of the time), instead
+	urb->start_frame is calculated here now, some calls inside usb-driver don't need to happen anymore.
+
+	To get the best out of this:
+	Disable APM-support in the kernel as APM-BIOS calls (once each second) hard disable interrupt for many precious milliseconds.
+	This helped me much on my slowish PII 400 & PIII 500.
+	ACPI yet untested but might cause the same bad behaviour.
+	Use a kernel with lowlatency and preemptiv patches applied.
+	To autoload snd-usb-midi append a line 
+		post-install snd-usb-us428 modprobe snd-usb-midi
+	to /etc/modules.conf.
+
+	known problems:
+	sliders, knobs, lights not yet handled except MASTER Volume slider.
+       	"pcm -c 2" doesn't work. "pcm -c 2 -m direct_interleaved" does.
+	KDE3: "Enable full duplex operation" deadlocks.
+
+	
+2002-08-31 Karsten Wiese
+	Version 0.0.3: audio also simplex;
+	simplifying: iso urbs only 1 packet, melted structs.
+	ASYNC_UNLINK not used anymore: no more crashes so far.....
+	for alsa 0.9 rc3.
+
+2002-08-09 Karsten Wiese
+	Version 0.0.2: midi works with snd-usb-midi, audio (only fullduplex now) with i.e. bristol.
+	The firmware has been sniffed from win2k us-428 driver 3.09.
+
+ *   Copyright (c) 2002 - 2004 Karsten Wiese
+ *
+ *   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 <sound/driver.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/interrupt.h>
+#include <linux/usb.h>
+#include <sound/core.h>
+#include <sound/initval.h>
+#include <sound/pcm.h>
+
+#include <sound/rawmidi.h>
+#include "usx2y.h"
+#include "usbusx2y.h"
+#include "usX2Yhwdep.h"
+
+
+
+MODULE_AUTHOR("Karsten Wiese <annabellesgarden@yahoo.de>");
+MODULE_DESCRIPTION("TASCAM "NAME_ALLCAPS" Version 0.8.7.1");
+MODULE_LICENSE("GPL");
+MODULE_SUPPORTED_DEVICE("{{TASCAM(0x1604), "NAME_ALLCAPS"(0x8001)(0x8005)(0x8007) }}");
+
+static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX; /* Index 0-max */
+static char* id[SNDRV_CARDS] = SNDRV_DEFAULT_STR; /* Id for this card */
+static int enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP; /* Enable this card */
+
+module_param_array(index, int, NULL, 0444);
+MODULE_PARM_DESC(index, "Index value for "NAME_ALLCAPS".");
+module_param_array(id, charp, NULL, 0444);
+MODULE_PARM_DESC(id, "ID string for "NAME_ALLCAPS".");
+module_param_array(enable, bool, NULL, 0444);
+MODULE_PARM_DESC(enable, "Enable "NAME_ALLCAPS".");
+
+
+static int snd_usX2Y_card_used[SNDRV_CARDS];
+
+static void usX2Y_usb_disconnect(struct usb_device* usb_device, void* ptr);
+static void snd_usX2Y_card_private_free(snd_card_t *card);
+
+/* 
+ * pipe 4 is used for switching the lamps, setting samplerate, volumes ....   
+ */
+static void i_usX2Y_Out04Int(struct urb* urb, struct pt_regs *regs)
+{
+#ifdef CONFIG_SND_DEBUG
+	if (urb->status) {
+		int 		i;
+		usX2Ydev_t*	usX2Y = urb->context;
+		for (i = 0; i < 10 && usX2Y->AS04.urb[i] != urb; i++);
+		snd_printdd("i_usX2Y_Out04Int() urb %i status=%i\n", i, urb->status);
+	}
+#endif
+}
+
+static void i_usX2Y_In04Int(struct urb* urb, struct pt_regs *regs)
+{
+	int			err = 0;
+	usX2Ydev_t		*usX2Y = urb->context;
+	us428ctls_sharedmem_t	*us428ctls = usX2Y->us428ctls_sharedmem;
+
+	usX2Y->In04IntCalls++;
+
+	if (urb->status) {
+		snd_printdd("Interrupt Pipe 4 came back with status=%i\n", urb->status);
+		return;
+	}
+
+	//	printk("%i:0x%02X ", 8, (int)((unsigned char*)usX2Y->In04Buf)[8]); Master volume shows 0 here if fader is at max during boot ?!?
+	if (us428ctls) {
+		int diff = -1;
+		if (-2 == us428ctls->CtlSnapShotLast) {
+			diff = 0;
+			memcpy(usX2Y->In04Last, usX2Y->In04Buf, sizeof(usX2Y->In04Last));
+			us428ctls->CtlSnapShotLast = -1;
+		} else {
+			int i;
+			for (i = 0; i < 21; i++) {
+				if (usX2Y->In04Last[i] != ((char*)usX2Y->In04Buf)[i]) {
+					if (diff < 0)
+						diff = i;
+					usX2Y->In04Last[i] = ((char*)usX2Y->In04Buf)[i];
+				}
+			}
+		}
+		if (0 <= diff) {
+			int n = us428ctls->CtlSnapShotLast + 1;
+			if (n >= N_us428_ctl_BUFS  ||  n < 0)
+				n = 0;
+			memcpy(us428ctls->CtlSnapShot + n, usX2Y->In04Buf, sizeof(us428ctls->CtlSnapShot[0]));
+			us428ctls->CtlSnapShotDiffersAt[n] = diff;
+			us428ctls->CtlSnapShotLast = n;
+			wake_up(&usX2Y->us428ctls_wait_queue_head);
+		}
+	}
+	
+	
+	if (usX2Y->US04) {
+		if (0 == usX2Y->US04->submitted)
+			do
+				err = usb_submit_urb(usX2Y->US04->urb[usX2Y->US04->submitted++], GFP_ATOMIC);
+			while (!err && usX2Y->US04->submitted < usX2Y->US04->len);
+	} else
+		if (us428ctls && us428ctls->p4outLast >= 0 && us428ctls->p4outLast < N_us428_p4out_BUFS) {
+			if (us428ctls->p4outLast != us428ctls->p4outSent) {
+				int j, send = us428ctls->p4outSent + 1;
+				if (send >= N_us428_p4out_BUFS)
+					send = 0;
+				for (j = 0; j < URBS_AsyncSeq  &&  !err; ++j)
+					if (0 == usX2Y->AS04.urb[j]->status) {
+						us428_p4out_t *p4out = us428ctls->p4out + send;	// FIXME if more then 1 p4out is new, 1 gets lost.
+						usb_fill_bulk_urb(usX2Y->AS04.urb[j], usX2Y->chip.dev,
+								  usb_sndbulkpipe(usX2Y->chip.dev, 0x04), &p4out->val.vol, 
+								  p4out->type == eLT_Light ? sizeof(us428_lights_t) : 5,
+								  i_usX2Y_Out04Int, usX2Y);
+						err = usb_submit_urb(usX2Y->AS04.urb[j], GFP_ATOMIC);
+						us428ctls->p4outSent = send;
+						break;
+					}
+			}
+		}
+
+	if (err) {
+		snd_printk("In04Int() usb_submit_urb err=%i\n", err);
+	}
+
+	urb->dev = usX2Y->chip.dev;
+	usb_submit_urb(urb, GFP_ATOMIC);
+}
+
+/*
+ * Prepare some urbs
+ */
+int usX2Y_AsyncSeq04_init(usX2Ydev_t* usX2Y)
+{
+	int	err = 0,
+		i;
+
+	if (NULL == (usX2Y->AS04.buffer = kmalloc(URB_DataLen_AsyncSeq*URBS_AsyncSeq, GFP_KERNEL))) {
+		err = -ENOMEM;
+	} else
+		for (i = 0; i < URBS_AsyncSeq; ++i) {
+			if (NULL == (usX2Y->AS04.urb[i] = usb_alloc_urb(0, GFP_KERNEL))) {
+				err = -ENOMEM;
+				break;
+			}
+			usb_fill_bulk_urb(	usX2Y->AS04.urb[i], usX2Y->chip.dev,
+						usb_sndbulkpipe(usX2Y->chip.dev, 0x04),
+						usX2Y->AS04.buffer + URB_DataLen_AsyncSeq*i, 0,
+						i_usX2Y_Out04Int, usX2Y
+				);
+		}
+	return err;
+}
+
+int usX2Y_In04_init(usX2Ydev_t* usX2Y)
+{
+	int	err = 0;
+	if (! (usX2Y->In04urb = usb_alloc_urb(0, GFP_KERNEL)))
+		return -ENOMEM;
+
+	if (! (usX2Y->In04Buf = kmalloc(21, GFP_KERNEL))) {
+		usb_free_urb(usX2Y->In04urb);
+		return -ENOMEM;
+	}
+	 
+	init_waitqueue_head(&usX2Y->In04WaitQueue);
+	usb_fill_int_urb(usX2Y->In04urb, usX2Y->chip.dev, usb_rcvintpipe(usX2Y->chip.dev, 0x4),
+			 usX2Y->In04Buf, 21,
+			 i_usX2Y_In04Int, usX2Y,
+			 10);
+	err = usb_submit_urb(usX2Y->In04urb, GFP_KERNEL);
+	return err;
+}
+
+static void usX2Y_unlinkSeq(snd_usX2Y_AsyncSeq_t* S)
+{
+	int	i;
+	for (i = 0; i < URBS_AsyncSeq; ++i) {
+		if (S[i].urb) {
+			usb_kill_urb(S->urb[i]);
+			usb_free_urb(S->urb[i]);
+			S->urb[i] = NULL;
+		}
+	}
+	kfree(S->buffer);
+}
+
+
+static struct usb_device_id snd_usX2Y_usb_id_table[] = {
+	{
+		.match_flags =	USB_DEVICE_ID_MATCH_DEVICE,
+		.idVendor =	0x1604,
+		.idProduct =	USB_ID_US428 
+	},
+	{
+		.match_flags =	USB_DEVICE_ID_MATCH_DEVICE,
+		.idVendor =	0x1604,
+		.idProduct =	USB_ID_US122 
+	},
+ 	{
+		.match_flags =	USB_DEVICE_ID_MATCH_DEVICE,
+		.idVendor =	0x1604,
+		.idProduct =	USB_ID_US224
+	},
+	{ /* terminator */ }
+};
+
+static snd_card_t* usX2Y_create_card(struct usb_device* device)
+{
+	int		dev;
+	snd_card_t*	card;
+	for (dev = 0; dev < SNDRV_CARDS; ++dev)
+		if (enable[dev] && !snd_usX2Y_card_used[dev])
+			break;
+	if (dev >= SNDRV_CARDS)
+		return NULL;
+	card = snd_card_new(index[dev], id[dev], THIS_MODULE, sizeof(usX2Ydev_t));
+	if (!card)
+		return NULL;
+	snd_usX2Y_card_used[usX2Y(card)->chip.index = dev] = 1;
+	card->private_free = snd_usX2Y_card_private_free;
+	usX2Y(card)->chip.dev = device;
+	usX2Y(card)->chip.card = card;
+	init_waitqueue_head(&usX2Y(card)->prepare_wait_queue);
+	init_MUTEX (&usX2Y(card)->prepare_mutex);
+	INIT_LIST_HEAD(&usX2Y(card)->chip.midi_list);
+	strcpy(card->driver, "USB "NAME_ALLCAPS"");
+	sprintf(card->shortname, "TASCAM "NAME_ALLCAPS"");
+	sprintf(card->longname, "%s (%x:%x if %d at %03d/%03d)",
+		card->shortname, 
+		le16_to_cpu(device->descriptor.idVendor),
+		le16_to_cpu(device->descriptor.idProduct),
+		0,//us428(card)->usbmidi.ifnum,
+		usX2Y(card)->chip.dev->bus->busnum, usX2Y(card)->chip.dev->devnum
+		);
+	snd_card_set_dev(card, &device->dev);
+	return card;
+}
+
+
+static void* usX2Y_usb_probe(struct usb_device* device, struct usb_interface *intf, const struct usb_device_id* device_id)
+{
+	int		err;
+	snd_card_t*	card;
+	if (le16_to_cpu(device->descriptor.idVendor) != 0x1604 ||
+	    (le16_to_cpu(device->descriptor.idProduct) != USB_ID_US122 &&
+	     le16_to_cpu(device->descriptor.idProduct) != USB_ID_US224 &&
+	     le16_to_cpu(device->descriptor.idProduct) != USB_ID_US428) ||
+	    !(card = usX2Y_create_card(device)))
+		return NULL;
+	if ((err = usX2Y_hwdep_new(card, device)) < 0  ||
+	    (err = snd_card_register(card)) < 0) {
+		snd_card_free(card);
+		return NULL;
+	}
+	return card;
+}
+
+/*
+ * new 2.5 USB kernel API
+ */
+static int snd_usX2Y_probe(struct usb_interface *intf, const struct usb_device_id *id)
+{
+	void *chip;
+	chip = usX2Y_usb_probe(interface_to_usbdev(intf), intf, id);
+	if (chip) {
+		dev_set_drvdata(&intf->dev, chip);
+		return 0;
+	} else
+		return -EIO;
+}
+
+static void snd_usX2Y_disconnect(struct usb_interface *intf)
+{
+	usX2Y_usb_disconnect(interface_to_usbdev(intf),
+				 dev_get_drvdata(&intf->dev));
+}
+
+MODULE_DEVICE_TABLE(usb, snd_usX2Y_usb_id_table);
+static struct usb_driver snd_usX2Y_usb_driver = {
+ 	.owner =	THIS_MODULE,
+	.name =		"snd-usb-usx2y",
+	.probe =	snd_usX2Y_probe,
+	.disconnect =	snd_usX2Y_disconnect,
+	.id_table =	snd_usX2Y_usb_id_table,
+};
+
+static void snd_usX2Y_card_private_free(snd_card_t *card)
+{
+	kfree(usX2Y(card)->In04Buf);
+	usb_free_urb(usX2Y(card)->In04urb);
+	if (usX2Y(card)->us428ctls_sharedmem)
+		snd_free_pages(usX2Y(card)->us428ctls_sharedmem, sizeof(*usX2Y(card)->us428ctls_sharedmem));
+	if (usX2Y(card)->chip.index >= 0  &&  usX2Y(card)->chip.index < SNDRV_CARDS)
+		snd_usX2Y_card_used[usX2Y(card)->chip.index] = 0;
+}
+
+/*
+ * Frees the device.
+ */
+static void usX2Y_usb_disconnect(struct usb_device* device, void* ptr)
+{
+	if (ptr) {
+		usX2Ydev_t* usX2Y = usX2Y((snd_card_t*)ptr);
+		struct list_head* p;
+		if (usX2Y->chip_status == USX2Y_STAT_CHIP_HUP)	// on 2.6.1 kernel snd_usbmidi_disconnect()
+			return;					// calls us back. better leave :-) .
+		usX2Y->chip.shutdown = 1;
+		usX2Y->chip_status = USX2Y_STAT_CHIP_HUP;
+		usX2Y_unlinkSeq(&usX2Y->AS04);
+		usb_kill_urb(usX2Y->In04urb);
+		snd_card_disconnect((snd_card_t*)ptr);
+		/* release the midi resources */
+		list_for_each(p, &usX2Y->chip.midi_list) {
+			snd_usbmidi_disconnect(p, &snd_usX2Y_usb_driver);
+		}
+		if (usX2Y->us428ctls_sharedmem) 
+			wake_up(&usX2Y->us428ctls_wait_queue_head);
+		snd_card_free_in_thread((snd_card_t*)ptr);
+	}
+}
+
+static int __init snd_usX2Y_module_init(void)
+{
+	return usb_register(&snd_usX2Y_usb_driver);
+}
+
+static void __exit snd_usX2Y_module_exit(void)
+{
+	usb_deregister(&snd_usX2Y_usb_driver);
+}
+
+module_init(snd_usX2Y_module_init)
+module_exit(snd_usX2Y_module_exit)
diff --git a/sound/usb/usx2y/usbusx2y.h b/sound/usb/usx2y/usbusx2y.h
new file mode 100644
index 00000000000..f65f3a7194c
--- /dev/null
+++ b/sound/usb/usx2y/usbusx2y.h
@@ -0,0 +1,84 @@
+#ifndef USBUSX2Y_H
+#define USBUSX2Y_H
+#include "../usbaudio.h"
+#include "usbus428ctldefs.h" 
+
+#define NRURBS	        2	
+
+
+#define URBS_AsyncSeq 10
+#define URB_DataLen_AsyncSeq 32
+typedef struct {
+	struct urb*	urb[URBS_AsyncSeq];
+	char*   buffer;
+} snd_usX2Y_AsyncSeq_t;
+
+typedef struct {
+	int	submitted;
+	int	len;
+	struct urb*	urb[0];
+} snd_usX2Y_urbSeq_t;
+
+typedef struct snd_usX2Y_substream snd_usX2Y_substream_t;
+#include "usx2yhwdeppcm.h"
+
+typedef struct {
+	snd_usb_audio_t 	chip;
+	int			stride;
+	struct urb		*In04urb;
+	void			*In04Buf;
+	char			In04Last[24];
+	unsigned		In04IntCalls;
+	snd_usX2Y_urbSeq_t	*US04;
+	wait_queue_head_t	In04WaitQueue;
+	snd_usX2Y_AsyncSeq_t	AS04;
+	unsigned int		rate,
+				format;
+	int			chip_status;
+	struct semaphore	prepare_mutex;
+	us428ctls_sharedmem_t	*us428ctls_sharedmem;
+	int			wait_iso_frame;
+	wait_queue_head_t	us428ctls_wait_queue_head;
+	snd_usX2Y_hwdep_pcm_shm_t	*hwdep_pcm_shm;
+	snd_usX2Y_substream_t	*subs[4];
+	snd_usX2Y_substream_t	* volatile  prepare_subs;
+	wait_queue_head_t	prepare_wait_queue;
+} usX2Ydev_t;
+
+
+struct snd_usX2Y_substream {
+	usX2Ydev_t	*usX2Y;
+	snd_pcm_substream_t *pcm_substream;
+
+	int			endpoint;		
+	unsigned int		maxpacksize;		/* max packet size in bytes */
+
+	atomic_t		state;
+#define state_STOPPED	0
+#define state_STARTING1 1
+#define state_STARTING2 2
+#define state_STARTING3 3
+#define state_PREPARED	4
+#define state_PRERUNNING  6
+#define state_RUNNING	8
+
+	int			hwptr;			/* free frame position in the buffer (only for playback) */
+	int			hwptr_done;		/* processed frame position in the buffer */
+	int			transfer_done;		/* processed frames since last period update */
+
+	struct urb		*urb[NRURBS];	/* data urb table */
+	struct urb		*completed_urb;
+	char			*tmpbuf;			/* temporary buffer for playback */
+};
+
+
+#define usX2Y(c) ((usX2Ydev_t*)(c)->private_data)
+
+int usX2Y_audio_create(snd_card_t* card);
+
+int usX2Y_AsyncSeq04_init(usX2Ydev_t* usX2Y);
+int usX2Y_In04_init(usX2Ydev_t* usX2Y);
+
+#define NAME_ALLCAPS "US-X2Y"
+
+#endif
diff --git a/sound/usb/usx2y/usbusx2yaudio.c b/sound/usb/usx2y/usbusx2yaudio.c
new file mode 100644
index 00000000000..4c292e09006
--- /dev/null
+++ b/sound/usb/usx2y/usbusx2yaudio.c
@@ -0,0 +1,1026 @@
+/*
+ *   US-X2Y AUDIO
+ *   Copyright (c) 2002-2004 by Karsten Wiese
+ *
+ *   based on
+ *
+ *   (Tentative) USB Audio Driver for ALSA
+ *
+ *   Main and PCM part
+ *
+ *   Copyright (c) 2002 by Takashi Iwai <tiwai@suse.de>
+ *
+ *   Many codes borrowed from audio.c by 
+ *	    Alan Cox (alan@lxorguk.ukuu.org.uk)
+ *	    Thomas Sailer (sailer@ife.ee.ethz.ch)
+ *
+ *
+ *   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 <sound/driver.h>
+#include <linux/interrupt.h>
+#include <linux/usb.h>
+#include <sound/core.h>
+#include <sound/info.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include "usx2y.h"
+#include "usbusx2y.h"
+
+#define USX2Y_NRPACKS 4			/* Default value used for nr of packs per urb.
+					  1 to 4 have been tested ok on uhci.
+					  To use 3 on ohci, you'd need a patch:
+					  look for "0000425-linux-2.6.9-rc4-mm1_ohci-hcd.patch.gz" on
+					  "https://bugtrack.alsa-project.org/alsa-bug/bug_view_page.php?bug_id=0000425"
+					  .
+					  1, 2 and 4 work out of the box on ohci, if I recall correctly.
+					  Bigger is safer operation,
+					  smaller gives lower latencies.
+					*/
+#define USX2Y_NRPACKS_VARIABLE y	/* If your system works ok with this module's parameter
+					   nrpacks set to 1, you might as well comment 
+					   this #define out, and thereby produce smaller, faster code.
+					   You'd also set USX2Y_NRPACKS to 1 then.
+					*/
+
+#ifdef USX2Y_NRPACKS_VARIABLE
+ static int nrpacks = USX2Y_NRPACKS; /* number of packets per urb */
+ #define  nr_of_packs() nrpacks
+ module_param(nrpacks, int, 0444);
+ MODULE_PARM_DESC(nrpacks, "Number of packets per URB.");
+#else
+ #define nr_of_packs() USX2Y_NRPACKS
+#endif
+
+
+static int usX2Y_urb_capt_retire(snd_usX2Y_substream_t *subs)
+{
+	struct urb	*urb = subs->completed_urb;
+	snd_pcm_runtime_t *runtime = subs->pcm_substream->runtime;
+	unsigned char	*cp;
+	int 		i, len, lens = 0, hwptr_done = subs->hwptr_done;
+	usX2Ydev_t	*usX2Y = subs->usX2Y;
+
+	for (i = 0; i < nr_of_packs(); i++) {
+		cp = (unsigned char*)urb->transfer_buffer + urb->iso_frame_desc[i].offset;
+		if (urb->iso_frame_desc[i].status) { /* active? hmm, skip this */
+			snd_printk("activ frame status %i. Most propably some hardware problem.\n", urb->iso_frame_desc[i].status);
+			return urb->iso_frame_desc[i].status;
+		}
+		len = urb->iso_frame_desc[i].actual_length / usX2Y->stride;
+		if (! len) {
+			snd_printd("0 == len ERROR!\n");
+			continue;
+		}
+
+		/* copy a data chunk */
+		if ((hwptr_done + len) > runtime->buffer_size) {
+			int cnt = runtime->buffer_size - hwptr_done;
+			int blen = cnt * usX2Y->stride;
+			memcpy(runtime->dma_area + hwptr_done * usX2Y->stride, cp, blen);
+			memcpy(runtime->dma_area, cp + blen, len * usX2Y->stride - blen);
+		} else {
+			memcpy(runtime->dma_area + hwptr_done * usX2Y->stride, cp, len * usX2Y->stride);
+		}
+		lens += len;
+		if ((hwptr_done += len) >= runtime->buffer_size)
+			hwptr_done -= runtime->buffer_size;
+	}
+
+	subs->hwptr_done = hwptr_done;
+	subs->transfer_done += lens;
+	/* update the pointer, call callback if necessary */
+	if (subs->transfer_done >= runtime->period_size) {
+		subs->transfer_done -= runtime->period_size;
+		snd_pcm_period_elapsed(subs->pcm_substream);
+	}
+	return 0;
+}
+/*
+ * prepare urb for playback data pipe
+ *
+ * we copy the data directly from the pcm buffer.
+ * the current position to be copied is held in hwptr field.
+ * since a urb can handle only a single linear buffer, if the total
+ * transferred area overflows the buffer boundary, we cannot send
+ * it directly from the buffer.  thus the data is once copied to
+ * a temporary buffer and urb points to that.
+ */
+static int usX2Y_urb_play_prepare(snd_usX2Y_substream_t *subs,
+				  struct urb *cap_urb,
+				  struct urb *urb)
+{
+	int count, counts, pack;
+	usX2Ydev_t* usX2Y = subs->usX2Y;
+	snd_pcm_runtime_t *runtime = subs->pcm_substream->runtime;
+
+	count = 0;
+	for (pack = 0; pack <  nr_of_packs(); pack++) {
+		/* calculate the size of a packet */
+		counts = cap_urb->iso_frame_desc[pack].actual_length / usX2Y->stride;
+		count += counts;
+		if (counts < 43 || counts > 50) {
+			snd_printk("should not be here with counts=%i\n", counts);
+			return -EPIPE;
+		}
+		/* set up descriptor */
+		urb->iso_frame_desc[pack].offset = pack ?
+			urb->iso_frame_desc[pack - 1].offset + urb->iso_frame_desc[pack - 1].length :
+			0;
+		urb->iso_frame_desc[pack].length = cap_urb->iso_frame_desc[pack].actual_length;
+	}
+	if (atomic_read(&subs->state) >= state_PRERUNNING)
+		if (subs->hwptr + count > runtime->buffer_size) {
+			/* err, the transferred area goes over buffer boundary.
+			 * copy the data to the temp buffer.
+			 */
+			int len;
+			len = runtime->buffer_size - subs->hwptr;
+			urb->transfer_buffer = subs->tmpbuf;
+			memcpy(subs->tmpbuf, runtime->dma_area + subs->hwptr * usX2Y->stride, len * usX2Y->stride);
+			memcpy(subs->tmpbuf + len * usX2Y->stride, runtime->dma_area, (count - len) * usX2Y->stride);
+			subs->hwptr += count;
+			subs->hwptr -= runtime->buffer_size;
+		} else {
+			/* set the buffer pointer */
+			urb->transfer_buffer = runtime->dma_area + subs->hwptr * usX2Y->stride;
+			if ((subs->hwptr += count) >= runtime->buffer_size)
+			subs->hwptr -= runtime->buffer_size;			
+		}
+	else
+		urb->transfer_buffer = subs->tmpbuf;
+	urb->transfer_buffer_length = count * usX2Y->stride;
+	return 0;
+}
+
+/*
+ * process after playback data complete
+ *
+ * update the current position and call callback if a period is processed.
+ */
+static void usX2Y_urb_play_retire(snd_usX2Y_substream_t *subs, struct urb *urb)
+{
+	snd_pcm_runtime_t *runtime = subs->pcm_substream->runtime;
+	int		len = urb->actual_length / subs->usX2Y->stride;
+
+	subs->transfer_done += len;
+	subs->hwptr_done +=  len;
+	if (subs->hwptr_done >= runtime->buffer_size)
+		subs->hwptr_done -= runtime->buffer_size;
+	if (subs->transfer_done >= runtime->period_size) {
+		subs->transfer_done -= runtime->period_size;
+		snd_pcm_period_elapsed(subs->pcm_substream);
+	}
+}
+
+static int usX2Y_urb_submit(snd_usX2Y_substream_t *subs, struct urb *urb, int frame)
+{
+	int err;
+	if (!urb)
+		return -ENODEV;
+	urb->start_frame = (frame + NRURBS * nr_of_packs());  // let hcd do rollover sanity checks
+	urb->hcpriv = NULL;
+	urb->dev = subs->usX2Y->chip.dev; /* we need to set this at each time */
+	if ((err = usb_submit_urb(urb, GFP_ATOMIC)) < 0) {
+		snd_printk("usb_submit_urb() returned %i\n", err);
+		return err;
+	}
+	return 0;
+}
+
+static inline int usX2Y_usbframe_complete(snd_usX2Y_substream_t *capsubs, snd_usX2Y_substream_t *playbacksubs, int frame)
+{
+	int err, state;
+	{
+		struct urb *urb = playbacksubs->completed_urb;
+
+		state = atomic_read(&playbacksubs->state);
+		if (NULL != urb) {
+			if (state == state_RUNNING)
+				usX2Y_urb_play_retire(playbacksubs, urb);
+			else
+				if (state >= state_PRERUNNING) {
+					atomic_inc(&playbacksubs->state);
+				}
+		} else {
+			switch (state) {
+			case state_STARTING1:
+				urb = playbacksubs->urb[0];
+				atomic_inc(&playbacksubs->state);
+				break;
+			case state_STARTING2:
+				urb = playbacksubs->urb[1];
+				atomic_inc(&playbacksubs->state);
+				break;
+			}
+		}
+		if (urb) {
+			if ((err = usX2Y_urb_play_prepare(playbacksubs, capsubs->completed_urb, urb)) ||
+			    (err = usX2Y_urb_submit(playbacksubs, urb, frame))) {
+				return err;
+			}
+		}
+
+		playbacksubs->completed_urb = NULL;
+	}
+	state = atomic_read(&capsubs->state);
+	if (state >= state_PREPARED) {
+		if (state == state_RUNNING) {
+			if ((err = usX2Y_urb_capt_retire(capsubs)))
+				return err;
+		} else
+			if (state >= state_PRERUNNING) {
+				atomic_inc(&capsubs->state);
+			}
+		if ((err = usX2Y_urb_submit(capsubs, capsubs->completed_urb, frame)))
+			return err;
+	}
+	capsubs->completed_urb = NULL;
+	return 0;
+}
+
+
+static void usX2Y_clients_stop(usX2Ydev_t *usX2Y)
+{
+	int s, u;
+	for (s = 0; s < 4; s++) {
+		snd_usX2Y_substream_t *subs = usX2Y->subs[s];
+		if (subs) {
+			snd_printdd("%i %p state=%i\n", s, subs, atomic_read(&subs->state));
+			atomic_set(&subs->state, state_STOPPED);
+		}
+	}
+	for (s = 0; s < 4; s++) {
+		snd_usX2Y_substream_t *subs = usX2Y->subs[s];
+		if (subs) {
+			if (atomic_read(&subs->state) >= state_PRERUNNING) {
+				snd_pcm_stop(subs->pcm_substream, SNDRV_PCM_STATE_XRUN);
+			}
+			for (u = 0; u < NRURBS; u++) {
+				struct urb *urb = subs->urb[u];
+				if (NULL != urb)
+					snd_printdd("%i status=%i start_frame=%i\n", u, urb->status, urb->start_frame);
+			}
+		}
+	}
+	usX2Y->prepare_subs = NULL;
+	wake_up(&usX2Y->prepare_wait_queue);
+}
+
+static void usX2Y_error_urb_status(usX2Ydev_t *usX2Y, snd_usX2Y_substream_t *subs, struct urb *urb)
+{
+	snd_printk("ep=%i stalled with status=%i\n", subs->endpoint, urb->status);
+	urb->status = 0;
+	usX2Y_clients_stop(usX2Y);
+}
+
+static void usX2Y_error_sequence(usX2Ydev_t *usX2Y, snd_usX2Y_substream_t *subs, struct urb *urb)
+{
+	snd_printk("Sequence Error!(hcd_frame=%i ep=%i%s;wait=%i,frame=%i).\n"
+		   "Most propably some urb of usb-frame %i is still missing.\n"
+		   "Cause could be too long delays in usb-hcd interrupt handling.\n",
+		   usb_get_current_frame_number(usX2Y->chip.dev),
+		   subs->endpoint, usb_pipein(urb->pipe) ? "in" : "out", usX2Y->wait_iso_frame, urb->start_frame, usX2Y->wait_iso_frame);
+	usX2Y_clients_stop(usX2Y);
+}
+
+static void i_usX2Y_urb_complete(struct urb *urb, struct pt_regs *regs)
+{
+	snd_usX2Y_substream_t *subs = (snd_usX2Y_substream_t*)urb->context;
+	usX2Ydev_t *usX2Y = subs->usX2Y;
+
+	if (unlikely(atomic_read(&subs->state) < state_PREPARED)) {
+		snd_printdd("hcd_frame=%i ep=%i%s status=%i start_frame=%i\n", usb_get_current_frame_number(usX2Y->chip.dev), subs->endpoint, usb_pipein(urb->pipe) ? "in" : "out", urb->status, urb->start_frame);
+		return;
+	}
+	if (unlikely(urb->status)) {
+		usX2Y_error_urb_status(usX2Y, subs, urb);
+		return;
+	}
+	if (likely((0xFFFF & urb->start_frame) == usX2Y->wait_iso_frame))
+		subs->completed_urb = urb;
+	else {
+		usX2Y_error_sequence(usX2Y, subs, urb);
+		return;
+	}
+	{
+		snd_usX2Y_substream_t *capsubs = usX2Y->subs[SNDRV_PCM_STREAM_CAPTURE],
+			*playbacksubs = usX2Y->subs[SNDRV_PCM_STREAM_PLAYBACK];
+		if (capsubs->completed_urb && atomic_read(&capsubs->state) >= state_PREPARED &&
+		    (playbacksubs->completed_urb || atomic_read(&playbacksubs->state) < state_PREPARED)) {
+			if (!usX2Y_usbframe_complete(capsubs, playbacksubs, urb->start_frame)) {
+				if (nr_of_packs() <= urb->start_frame &&
+				    urb->start_frame <= (2 * nr_of_packs() - 1))	// uhci and ohci
+					usX2Y->wait_iso_frame = urb->start_frame - nr_of_packs();
+				else
+					usX2Y->wait_iso_frame +=  nr_of_packs();
+			} else {
+				snd_printdd("\n");
+				usX2Y_clients_stop(usX2Y);
+			}
+		}
+	}
+}
+
+static void usX2Y_urbs_set_complete(usX2Ydev_t * usX2Y, void (*complete)(struct urb *, struct pt_regs *))
+{
+	int s, u;
+	for (s = 0; s < 4; s++) {
+		snd_usX2Y_substream_t *subs = usX2Y->subs[s];
+		if (NULL != subs)
+			for (u = 0; u < NRURBS; u++) {
+				struct urb * urb = subs->urb[u];
+				if (NULL != urb)
+					urb->complete = complete;
+			}
+	}
+}
+
+static void usX2Y_subs_startup_finish(usX2Ydev_t * usX2Y)
+{
+	usX2Y_urbs_set_complete(usX2Y, i_usX2Y_urb_complete);
+	usX2Y->prepare_subs = NULL;
+}
+
+static void i_usX2Y_subs_startup(struct urb *urb, struct pt_regs *regs)
+{
+	snd_usX2Y_substream_t *subs = (snd_usX2Y_substream_t*)urb->context;
+	usX2Ydev_t *usX2Y = subs->usX2Y;
+	snd_usX2Y_substream_t *prepare_subs = usX2Y->prepare_subs;
+	if (NULL != prepare_subs)
+		if (urb->start_frame == prepare_subs->urb[0]->start_frame) {
+			usX2Y_subs_startup_finish(usX2Y);
+			atomic_inc(&prepare_subs->state);
+			wake_up(&usX2Y->prepare_wait_queue);
+		}
+
+	i_usX2Y_urb_complete(urb, regs);
+}
+
+static void usX2Y_subs_prepare(snd_usX2Y_substream_t *subs)
+{
+	snd_printdd("usX2Y_substream_prepare(%p) ep=%i urb0=%p urb1=%p\n", subs, subs->endpoint, subs->urb[0], subs->urb[1]);
+	/* reset the pointer */
+	subs->hwptr = 0;
+	subs->hwptr_done = 0;
+	subs->transfer_done = 0;
+}
+
+
+static void usX2Y_urb_release(struct urb** urb, int free_tb)
+{
+	if (*urb) {
+		usb_kill_urb(*urb);
+		if (free_tb)
+			kfree((*urb)->transfer_buffer);
+		usb_free_urb(*urb);
+		*urb = NULL;
+	}
+}
+/*
+ * release a substreams urbs
+ */
+static void usX2Y_urbs_release(snd_usX2Y_substream_t *subs)
+{
+	int i;
+	snd_printdd("usX2Y_urbs_release() %i\n", subs->endpoint);
+	for (i = 0; i < NRURBS; i++)
+		usX2Y_urb_release(subs->urb + i, subs != subs->usX2Y->subs[SNDRV_PCM_STREAM_PLAYBACK]);
+
+	if (subs->tmpbuf) {
+		kfree(subs->tmpbuf);
+		subs->tmpbuf = NULL;
+	}
+}
+/*
+ * initialize a substream's urbs
+ */
+static int usX2Y_urbs_allocate(snd_usX2Y_substream_t *subs)
+{
+	int i;
+	unsigned int pipe;
+	int is_playback = subs == subs->usX2Y->subs[SNDRV_PCM_STREAM_PLAYBACK];
+	struct usb_device *dev = subs->usX2Y->chip.dev;
+
+	pipe = is_playback ? usb_sndisocpipe(dev, subs->endpoint) :
+			usb_rcvisocpipe(dev, subs->endpoint);
+	subs->maxpacksize = usb_maxpacket(dev, pipe, is_playback);
+	if (!subs->maxpacksize)
+		return -EINVAL;
+
+	if (is_playback && NULL == subs->tmpbuf) {	/* allocate a temporary buffer for playback */
+		subs->tmpbuf = kcalloc(nr_of_packs(), subs->maxpacksize, GFP_KERNEL);
+		if (NULL == subs->tmpbuf) {
+			snd_printk(KERN_ERR "cannot malloc tmpbuf\n");
+			return -ENOMEM;
+		}
+	}
+	/* allocate and initialize data urbs */
+	for (i = 0; i < NRURBS; i++) {
+		struct urb** purb = subs->urb + i;
+		if (*purb) {
+			usb_kill_urb(*purb);
+			continue;
+		}
+		*purb = usb_alloc_urb(nr_of_packs(), GFP_KERNEL);
+		if (NULL == *purb) {
+			usX2Y_urbs_release(subs);
+			return -ENOMEM;
+		}
+		if (!is_playback && !(*purb)->transfer_buffer) {
+			/* allocate a capture buffer per urb */
+			(*purb)->transfer_buffer = kmalloc(subs->maxpacksize * nr_of_packs(), GFP_KERNEL);
+			if (NULL == (*purb)->transfer_buffer) {
+				usX2Y_urbs_release(subs);
+				return -ENOMEM;
+			}
+		}
+		(*purb)->dev = dev;
+		(*purb)->pipe = pipe;
+		(*purb)->number_of_packets = nr_of_packs();
+		(*purb)->context = subs;
+		(*purb)->interval = 1;
+		(*purb)->complete = i_usX2Y_subs_startup;
+	}
+	return 0;
+}
+
+static void usX2Y_subs_startup(snd_usX2Y_substream_t *subs)
+{
+	usX2Ydev_t *usX2Y = subs->usX2Y;
+	usX2Y->prepare_subs = subs;
+	subs->urb[0]->start_frame = -1;
+	wmb();
+	usX2Y_urbs_set_complete(usX2Y, i_usX2Y_subs_startup);
+}
+
+static int usX2Y_urbs_start(snd_usX2Y_substream_t *subs)
+{
+	int i, err;
+	usX2Ydev_t *usX2Y = subs->usX2Y;
+
+	if ((err = usX2Y_urbs_allocate(subs)) < 0)
+		return err;
+	subs->completed_urb = NULL;
+	for (i = 0; i < 4; i++) {
+		snd_usX2Y_substream_t *subs = usX2Y->subs[i];
+		if (subs != NULL && atomic_read(&subs->state) >= state_PREPARED)
+			goto start;
+	}
+	usX2Y->wait_iso_frame = -1;
+ start:
+	{
+		usX2Y_subs_startup(subs);
+		for (i = 0; i < NRURBS; i++) {
+			struct urb *urb = subs->urb[i];
+			if (usb_pipein(urb->pipe)) {
+				unsigned long pack;
+				if (0 == i)
+					atomic_set(&subs->state, state_STARTING3);
+				urb->dev = usX2Y->chip.dev;
+				urb->transfer_flags = URB_ISO_ASAP;
+				for (pack = 0; pack < nr_of_packs(); pack++) {
+					urb->iso_frame_desc[pack].offset = subs->maxpacksize * pack;
+					urb->iso_frame_desc[pack].length = subs->maxpacksize;
+				}
+				urb->transfer_buffer_length = subs->maxpacksize * nr_of_packs(); 
+				if ((err = usb_submit_urb(urb, GFP_ATOMIC)) < 0) {
+					snd_printk (KERN_ERR "cannot submit datapipe for urb %d, err = %d\n", i, err);
+					err = -EPIPE;
+					goto cleanup;
+				} else {
+					if (0 > usX2Y->wait_iso_frame)
+						usX2Y->wait_iso_frame = urb->start_frame;
+				}
+				urb->transfer_flags = 0;
+			} else {
+				atomic_set(&subs->state, state_STARTING1);
+				break;
+			}
+		}
+		err = 0;
+		wait_event(usX2Y->prepare_wait_queue, NULL == usX2Y->prepare_subs);
+		if (atomic_read(&subs->state) != state_PREPARED) {
+			err = -EPIPE;
+		}
+
+	cleanup:
+		if (err) {
+			usX2Y_subs_startup_finish(usX2Y);
+			usX2Y_clients_stop(usX2Y);		// something is completely wroong > stop evrything
+		}
+	}
+	return err;
+}
+
+/*
+ * return the current pcm pointer.  just return the hwptr_done value.
+ */
+static snd_pcm_uframes_t snd_usX2Y_pcm_pointer(snd_pcm_substream_t *substream)
+{
+	snd_usX2Y_substream_t *subs = (snd_usX2Y_substream_t *)substream->runtime->private_data;
+	return subs->hwptr_done;
+}
+/*
+ * start/stop substream
+ */
+static int snd_usX2Y_pcm_trigger(snd_pcm_substream_t *substream, int cmd)
+{
+	snd_usX2Y_substream_t *subs = (snd_usX2Y_substream_t *)substream->runtime->private_data;
+
+	switch (cmd) {
+	case SNDRV_PCM_TRIGGER_START:
+		snd_printdd("snd_usX2Y_pcm_trigger(START)\n");
+		if (atomic_read(&subs->state) == state_PREPARED &&
+		    atomic_read(&subs->usX2Y->subs[SNDRV_PCM_STREAM_CAPTURE]->state) >= state_PREPARED) {
+			atomic_set(&subs->state, state_PRERUNNING);
+		} else {
+			snd_printdd("\n");
+			return -EPIPE;
+		}
+		break;
+	case SNDRV_PCM_TRIGGER_STOP:
+		snd_printdd("snd_usX2Y_pcm_trigger(STOP)\n");
+		if (atomic_read(&subs->state) >= state_PRERUNNING)
+			atomic_set(&subs->state, state_PREPARED);
+		break;
+	default:
+		return -EINVAL;
+	}
+	return 0;
+}
+
+
+/*
+ * allocate a buffer, setup samplerate
+ *
+ * so far we use a physically linear buffer although packetize transfer
+ * doesn't need a continuous area.
+ * if sg buffer is supported on the later version of alsa, we'll follow
+ * that.
+ */
+static struct s_c2
+{
+	char c1, c2;
+}
+	SetRate44100[] =
+{
+	{ 0x14, 0x08},	// this line sets 44100, well actually a little less
+	{ 0x18, 0x40},	// only tascam / frontier design knows the further lines .......
+	{ 0x18, 0x42},
+	{ 0x18, 0x45},
+	{ 0x18, 0x46},
+	{ 0x18, 0x48},
+	{ 0x18, 0x4A},
+	{ 0x18, 0x4C},
+	{ 0x18, 0x4E},
+	{ 0x18, 0x50},
+	{ 0x18, 0x52},
+	{ 0x18, 0x54},
+	{ 0x18, 0x56},
+	{ 0x18, 0x58},
+	{ 0x18, 0x5A},
+	{ 0x18, 0x5C},
+	{ 0x18, 0x5E},
+	{ 0x18, 0x60},
+	{ 0x18, 0x62},
+	{ 0x18, 0x64},
+	{ 0x18, 0x66},
+	{ 0x18, 0x68},
+	{ 0x18, 0x6A},
+	{ 0x18, 0x6C},
+	{ 0x18, 0x6E},
+	{ 0x18, 0x70},
+	{ 0x18, 0x72},
+	{ 0x18, 0x74},
+	{ 0x18, 0x76},
+	{ 0x18, 0x78},
+	{ 0x18, 0x7A},
+	{ 0x18, 0x7C},
+	{ 0x18, 0x7E}
+};
+static struct s_c2 SetRate48000[] =
+{
+	{ 0x14, 0x09},	// this line sets 48000, well actually a little less
+	{ 0x18, 0x40},	// only tascam / frontier design knows the further lines .......
+	{ 0x18, 0x42},
+	{ 0x18, 0x45},
+	{ 0x18, 0x46},
+	{ 0x18, 0x48},
+	{ 0x18, 0x4A},
+	{ 0x18, 0x4C},
+	{ 0x18, 0x4E},
+	{ 0x18, 0x50},
+	{ 0x18, 0x52},
+	{ 0x18, 0x54},
+	{ 0x18, 0x56},
+	{ 0x18, 0x58},
+	{ 0x18, 0x5A},
+	{ 0x18, 0x5C},
+	{ 0x18, 0x5E},
+	{ 0x18, 0x60},
+	{ 0x18, 0x62},
+	{ 0x18, 0x64},
+	{ 0x18, 0x66},
+	{ 0x18, 0x68},
+	{ 0x18, 0x6A},
+	{ 0x18, 0x6C},
+	{ 0x18, 0x6E},
+	{ 0x18, 0x70},
+	{ 0x18, 0x73},
+	{ 0x18, 0x74},
+	{ 0x18, 0x76},
+	{ 0x18, 0x78},
+	{ 0x18, 0x7A},
+	{ 0x18, 0x7C},
+	{ 0x18, 0x7E}
+};
+#define NOOF_SETRATE_URBS ARRAY_SIZE(SetRate48000)
+
+static void i_usX2Y_04Int(struct urb* urb, struct pt_regs *regs)
+{
+	usX2Ydev_t*	usX2Y = urb->context;
+	
+	if (urb->status) {
+		snd_printk("snd_usX2Y_04Int() urb->status=%i\n", urb->status);
+	}
+	if (0 == --usX2Y->US04->len)
+		wake_up(&usX2Y->In04WaitQueue);
+}
+
+static int usX2Y_rate_set(usX2Ydev_t *usX2Y, int rate)
+{
+	int			err = 0, i;
+	snd_usX2Y_urbSeq_t	*us = NULL;
+	int			*usbdata = NULL;
+	struct s_c2		*ra = rate == 48000 ? SetRate48000 : SetRate44100;
+
+	if (usX2Y->rate != rate) {
+		us = kmalloc(sizeof(*us) + sizeof(struct urb*) * NOOF_SETRATE_URBS, GFP_KERNEL);
+		if (NULL == us) {
+			err = -ENOMEM;
+			goto cleanup;
+		}
+		memset(us, 0, sizeof(*us) + sizeof(struct urb*) * NOOF_SETRATE_URBS); 
+		usbdata = kmalloc(sizeof(int)*NOOF_SETRATE_URBS, GFP_KERNEL);
+		if (NULL == usbdata) {
+			err = -ENOMEM;
+			goto cleanup;
+		}
+		for (i = 0; i < NOOF_SETRATE_URBS; ++i) {
+			if (NULL == (us->urb[i] = usb_alloc_urb(0, GFP_KERNEL))) {
+				err = -ENOMEM;
+				goto cleanup;
+			}
+			((char*)(usbdata + i))[0] = ra[i].c1;
+			((char*)(usbdata + i))[1] = ra[i].c2;
+			usb_fill_bulk_urb(us->urb[i], usX2Y->chip.dev, usb_sndbulkpipe(usX2Y->chip.dev, 4),
+					  usbdata + i, 2, i_usX2Y_04Int, usX2Y);
+#ifdef OLD_USB
+			us->urb[i]->transfer_flags = USB_QUEUE_BULK;
+#endif
+		}
+		us->submitted =	0;
+		us->len =	NOOF_SETRATE_URBS;
+		usX2Y->US04 =	us;
+		wait_event_timeout(usX2Y->In04WaitQueue, 0 == us->len, HZ);
+		usX2Y->US04 =	NULL;
+		if (us->len)
+			err = -ENODEV;
+	cleanup:
+		if (us) {
+			us->submitted =	2*NOOF_SETRATE_URBS;
+			for (i = 0; i < NOOF_SETRATE_URBS; ++i) {
+				struct urb *urb = us->urb[i];
+				if (urb->status) {
+					if (!err)
+						err = -ENODEV;
+					usb_kill_urb(urb);
+				}
+				usb_free_urb(urb);
+			}
+			usX2Y->US04 = NULL;
+			kfree(usbdata);
+			kfree(us);
+			if (!err) {
+				usX2Y->rate = rate;
+			}
+		}
+	}
+
+	return err;
+}
+
+
+static int usX2Y_format_set(usX2Ydev_t *usX2Y, snd_pcm_format_t format)
+{
+	int alternate, err;
+	struct list_head* p;
+	if (format == SNDRV_PCM_FORMAT_S24_3LE) {
+		alternate = 2;
+		usX2Y->stride = 6;
+	} else {
+		alternate = 1;
+		usX2Y->stride = 4;
+	}
+	list_for_each(p, &usX2Y->chip.midi_list) {
+		snd_usbmidi_input_stop(p);
+	}
+	usb_kill_urb(usX2Y->In04urb);
+	if ((err = usb_set_interface(usX2Y->chip.dev, 0, alternate))) {
+		snd_printk("usb_set_interface error \n");
+		return err;
+	}
+	usX2Y->In04urb->dev = usX2Y->chip.dev;
+	err = usb_submit_urb(usX2Y->In04urb, GFP_KERNEL);
+	list_for_each(p, &usX2Y->chip.midi_list) {
+		snd_usbmidi_input_start(p);
+	}
+	usX2Y->format = format;
+	usX2Y->rate = 0;
+	return err;
+}
+
+
+static int snd_usX2Y_pcm_hw_params(snd_pcm_substream_t *substream,
+				   snd_pcm_hw_params_t *hw_params)
+{
+	int			err = 0;
+	unsigned int		rate = params_rate(hw_params);
+	snd_pcm_format_t	format = params_format(hw_params);
+	snd_printdd("snd_usX2Y_hw_params(%p, %p)\n", substream, hw_params);
+
+	{	// all pcm substreams off one usX2Y have to operate at the same rate & format
+		snd_card_t *card = substream->pstr->pcm->card;
+		struct list_head *list;
+		list_for_each(list, &card->devices) {
+			snd_device_t *dev;
+			snd_pcm_t *pcm;
+			int s;
+			dev = snd_device(list);
+			if (dev->type != SNDRV_DEV_PCM)
+				continue;
+			pcm = dev->device_data;
+			for (s = 0; s < 2; ++s) {
+				snd_pcm_substream_t *test_substream;
+				test_substream = pcm->streams[s].substream;
+				if (test_substream && test_substream != substream  &&
+				    test_substream->runtime &&
+				    ((test_substream->runtime->format &&
+				      test_substream->runtime->format != format) ||
+				     (test_substream->runtime->rate &&
+				      test_substream->runtime->rate != rate)))
+					return -EINVAL;
+			}
+		}
+	}
+	if (0 > (err = snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(hw_params)))) {
+		snd_printk("snd_pcm_lib_malloc_pages(%p, %i) returned %i\n", substream, params_buffer_bytes(hw_params), err);
+		return err;
+	}
+	return 0;
+}
+
+/*
+ * free the buffer
+ */
+static int snd_usX2Y_pcm_hw_free(snd_pcm_substream_t *substream)
+{
+	snd_pcm_runtime_t *runtime = substream->runtime;
+	snd_usX2Y_substream_t *subs = (snd_usX2Y_substream_t *)runtime->private_data;
+	down(&subs->usX2Y->prepare_mutex);
+	snd_printdd("snd_usX2Y_hw_free(%p)\n", substream);
+
+	if (SNDRV_PCM_STREAM_PLAYBACK == substream->stream) {
+		snd_usX2Y_substream_t *cap_subs = subs->usX2Y->subs[SNDRV_PCM_STREAM_CAPTURE];
+		atomic_set(&subs->state, state_STOPPED);
+		usX2Y_urbs_release(subs);
+		if (!cap_subs->pcm_substream ||
+		    !cap_subs->pcm_substream->runtime ||
+		    !cap_subs->pcm_substream->runtime->status ||
+		    cap_subs->pcm_substream->runtime->status->state < SNDRV_PCM_STATE_PREPARED) {
+			atomic_set(&cap_subs->state, state_STOPPED);
+			usX2Y_urbs_release(cap_subs);
+		}
+	} else {
+		snd_usX2Y_substream_t *playback_subs = subs->usX2Y->subs[SNDRV_PCM_STREAM_PLAYBACK];
+		if (atomic_read(&playback_subs->state) < state_PREPARED) {
+			atomic_set(&subs->state, state_STOPPED);
+			usX2Y_urbs_release(subs);
+		}
+	}
+	up(&subs->usX2Y->prepare_mutex);
+	return snd_pcm_lib_free_pages(substream);
+}
+/*
+ * prepare callback
+ *
+ * set format and initialize urbs
+ */
+static int snd_usX2Y_pcm_prepare(snd_pcm_substream_t *substream)
+{
+	snd_pcm_runtime_t *runtime = substream->runtime;
+	snd_usX2Y_substream_t *subs = (snd_usX2Y_substream_t *)runtime->private_data;
+	usX2Ydev_t *usX2Y = subs->usX2Y;
+	snd_usX2Y_substream_t *capsubs = subs->usX2Y->subs[SNDRV_PCM_STREAM_CAPTURE];
+	int err = 0;
+	snd_printdd("snd_usX2Y_pcm_prepare(%p)\n", substream);
+
+	down(&usX2Y->prepare_mutex);
+	usX2Y_subs_prepare(subs);
+// Start hardware streams
+// SyncStream first....
+	if (atomic_read(&capsubs->state) < state_PREPARED) {
+		if (usX2Y->format != runtime->format)
+			if ((err = usX2Y_format_set(usX2Y, runtime->format)) < 0)
+				goto up_prepare_mutex;
+		if (usX2Y->rate != runtime->rate)
+			if ((err = usX2Y_rate_set(usX2Y, runtime->rate)) < 0)
+				goto up_prepare_mutex;
+		snd_printdd("starting capture pipe for %s\n", subs == capsubs ? "self" : "playpipe");
+		if (0 > (err = usX2Y_urbs_start(capsubs)))
+			goto up_prepare_mutex;
+	}
+
+	if (subs != capsubs && atomic_read(&subs->state) < state_PREPARED)
+		err = usX2Y_urbs_start(subs);
+
+ up_prepare_mutex:
+	up(&usX2Y->prepare_mutex);
+	return err;
+}
+
+static snd_pcm_hardware_t snd_usX2Y_2c =
+{
+	.info =			(SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
+				 SNDRV_PCM_INFO_BLOCK_TRANSFER |
+				 SNDRV_PCM_INFO_MMAP_VALID),
+	.formats =                 SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_3LE,
+	.rates =                   SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000,
+	.rate_min =                44100,
+	.rate_max =                48000,
+	.channels_min =            2,
+	.channels_max =            2,
+	.buffer_bytes_max =	(2*128*1024),
+	.period_bytes_min =	64,
+	.period_bytes_max =	(128*1024),
+	.periods_min =		2,
+	.periods_max =		1024,
+	.fifo_size =              0
+};
+
+
+
+static int snd_usX2Y_pcm_open(snd_pcm_substream_t *substream)
+{
+	snd_usX2Y_substream_t	*subs = ((snd_usX2Y_substream_t **)
+					 snd_pcm_substream_chip(substream))[substream->stream];
+	snd_pcm_runtime_t	*runtime = substream->runtime;
+
+	if (subs->usX2Y->chip_status & USX2Y_STAT_CHIP_MMAP_PCM_URBS)
+		return -EBUSY;
+
+	runtime->hw = snd_usX2Y_2c;
+	runtime->private_data = subs;
+	subs->pcm_substream = substream;
+	snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_TIME, 1000, 200000);
+	return 0;
+}
+
+
+
+static int snd_usX2Y_pcm_close(snd_pcm_substream_t *substream)
+{
+	snd_pcm_runtime_t *runtime = substream->runtime;
+	snd_usX2Y_substream_t *subs = (snd_usX2Y_substream_t *)runtime->private_data;
+	int err = 0;
+
+	subs->pcm_substream = NULL;
+
+	return err;
+}
+
+
+static snd_pcm_ops_t snd_usX2Y_pcm_ops = 
+{
+	.open =		snd_usX2Y_pcm_open,
+	.close =	snd_usX2Y_pcm_close,
+	.ioctl =	snd_pcm_lib_ioctl,
+	.hw_params =	snd_usX2Y_pcm_hw_params,
+	.hw_free =	snd_usX2Y_pcm_hw_free,
+	.prepare =	snd_usX2Y_pcm_prepare,
+	.trigger =	snd_usX2Y_pcm_trigger,
+	.pointer =	snd_usX2Y_pcm_pointer,
+};
+
+
+/*
+ * free a usb stream instance
+ */
+static void usX2Y_audio_stream_free(snd_usX2Y_substream_t **usX2Y_substream)
+{
+	if (NULL != usX2Y_substream[SNDRV_PCM_STREAM_PLAYBACK]) {
+		kfree(usX2Y_substream[SNDRV_PCM_STREAM_PLAYBACK]);
+		usX2Y_substream[SNDRV_PCM_STREAM_PLAYBACK] = NULL;
+	}
+	kfree(usX2Y_substream[SNDRV_PCM_STREAM_CAPTURE]);
+	usX2Y_substream[SNDRV_PCM_STREAM_CAPTURE] = NULL;
+}
+
+static void snd_usX2Y_pcm_private_free(snd_pcm_t *pcm)
+{
+	snd_usX2Y_substream_t **usX2Y_stream = pcm->private_data;
+	if (usX2Y_stream) {
+		snd_pcm_lib_preallocate_free_for_all(pcm);
+		usX2Y_audio_stream_free(usX2Y_stream);
+	}
+}
+
+static int usX2Y_audio_stream_new(snd_card_t *card, int playback_endpoint, int capture_endpoint)
+{
+	snd_pcm_t *pcm;
+	int err, i;
+	snd_usX2Y_substream_t **usX2Y_substream =
+		usX2Y(card)->subs + 2 * usX2Y(card)->chip.pcm_devs;
+
+	for (i = playback_endpoint ? SNDRV_PCM_STREAM_PLAYBACK : SNDRV_PCM_STREAM_CAPTURE;
+	     i <= SNDRV_PCM_STREAM_CAPTURE; ++i) {
+		usX2Y_substream[i] = kcalloc(1, sizeof(snd_usX2Y_substream_t), GFP_KERNEL);
+		if (NULL == usX2Y_substream[i]) {
+			snd_printk(KERN_ERR "cannot malloc\n");
+			return -ENOMEM;
+		}
+		usX2Y_substream[i]->usX2Y = usX2Y(card);
+	}
+
+	if (playback_endpoint)
+		usX2Y_substream[SNDRV_PCM_STREAM_PLAYBACK]->endpoint = playback_endpoint;
+	usX2Y_substream[SNDRV_PCM_STREAM_CAPTURE]->endpoint = capture_endpoint;
+
+	err = snd_pcm_new(card, NAME_ALLCAPS" Audio", usX2Y(card)->chip.pcm_devs,
+			  playback_endpoint ? 1 : 0, 1,
+			  &pcm);
+	if (err < 0) {
+		usX2Y_audio_stream_free(usX2Y_substream);
+		return err;
+	}
+
+	if (playback_endpoint)
+		snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_usX2Y_pcm_ops);
+	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_usX2Y_pcm_ops);
+
+	pcm->private_data = usX2Y_substream;
+	pcm->private_free = snd_usX2Y_pcm_private_free;
+	pcm->info_flags = 0;
+
+	sprintf(pcm->name, NAME_ALLCAPS" Audio #%d", usX2Y(card)->chip.pcm_devs);
+
+	if ((playback_endpoint &&
+	     0 > (err = snd_pcm_lib_preallocate_pages(pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream,
+						     SNDRV_DMA_TYPE_CONTINUOUS,
+						     snd_dma_continuous_data(GFP_KERNEL),
+						     64*1024, 128*1024))) ||
+	    0 > (err = snd_pcm_lib_preallocate_pages(pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream,
+	    					     SNDRV_DMA_TYPE_CONTINUOUS,
+	    					     snd_dma_continuous_data(GFP_KERNEL),
+						     64*1024, 128*1024))) {
+		snd_usX2Y_pcm_private_free(pcm);
+		return err;
+	}
+	usX2Y(card)->chip.pcm_devs++;
+
+	return 0;
+}
+
+/*
+ * create a chip instance and set its names.
+ */
+int usX2Y_audio_create(snd_card_t* card)
+{
+	int err = 0;
+	
+	INIT_LIST_HEAD(&usX2Y(card)->chip.pcm_list);
+
+	if (0 > (err = usX2Y_audio_stream_new(card, 0xA, 0x8)))
+		return err;
+	if (le16_to_cpu(usX2Y(card)->chip.dev->descriptor.idProduct) == USB_ID_US428)
+	     if (0 > (err = usX2Y_audio_stream_new(card, 0, 0xA)))
+		     return err;
+	if (le16_to_cpu(usX2Y(card)->chip.dev->descriptor.idProduct) != USB_ID_US122)
+		err = usX2Y_rate_set(usX2Y(card), 44100);	// Lets us428 recognize output-volume settings, disturbs us122.
+	return err;
+}
diff --git a/sound/usb/usx2y/usx2y.h b/sound/usb/usx2y/usx2y.h
new file mode 100644
index 00000000000..7e59263dd89
--- /dev/null
+++ b/sound/usb/usx2y/usx2y.h
@@ -0,0 +1,51 @@
+/*
+ * Driver for Tascam US-X2Y USB soundcards
+ *
+ * Copyright (c) 2003 by Karsten Wiese <annabellesgarden@yahoo.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
+ */
+
+#ifndef __SOUND_USX2Y_COMMON_H
+#define __SOUND_USX2Y_COMMON_H
+
+
+#define USX2Y_DRIVER_VERSION	0x0100	/* 0.1.0 */
+
+
+/* hwdep id string */
+#define SND_USX2Y_LOADER_ID		"USX2Y Loader"
+#define SND_USX2Y_USBPCM_ID		"USX2Y USBPCM"
+
+/* hardware type */
+enum {
+	USX2Y_TYPE_122,
+	USX2Y_TYPE_224,
+	USX2Y_TYPE_428,
+	USX2Y_TYPE_NUMS
+};
+
+#define USB_ID_US122 0x8007
+#define USB_ID_US224 0x8005
+#define USB_ID_US428 0x8001
+
+/* chip status */
+enum {
+	USX2Y_STAT_CHIP_INIT	=	(1 << 0),	/* all operational */
+	USX2Y_STAT_CHIP_MMAP_PCM_URBS = (1 << 1),	/* pcm transport over mmaped urbs */
+	USX2Y_STAT_CHIP_HUP	=	(1 << 31),	/* all operational */
+};
+
+#endif /* __SOUND_USX2Y_COMMON_H */
diff --git a/sound/usb/usx2y/usx2yhwdeppcm.c b/sound/usb/usx2y/usx2yhwdeppcm.c
new file mode 100644
index 00000000000..bb2c8e9000c
--- /dev/null
+++ b/sound/usb/usx2y/usx2yhwdeppcm.c
@@ -0,0 +1,807 @@
+/*
+ *   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
+ */
+
+/* USX2Y "rawusb" aka hwdep_pcm implementation
+
+ Its usb's unableness to atomically handle power of 2 period sized data chuncs
+ at standard samplerates,
+ what led to this part of the usx2y module: 
+ It provides the alsa kernel half of the usx2y-alsa-jack driver pair.
+ The pair uses a hardware dependant alsa-device for mmaped pcm transport.
+ Advantage achieved:
+         The usb_hc moves pcm data from/into memory via DMA.
+         That memory is mmaped by jack's usx2y driver.
+         Jack's usx2y driver is the first/last to read/write pcm data.
+         Read/write is a combination of power of 2 period shaping and
+         float/int conversation.
+         Compared to mainline alsa/jack we leave out power of 2 period shaping inside
+         snd-usb-usx2y which needs memcpy() and additional buffers.
+         As a side effect possible unwanted pcm-data coruption resulting of
+         standard alsa's snd-usb-usx2y period shaping scheme falls away.
+         Result is sane jack operation at buffering schemes down to 128frames,
+         2 periods.
+         plain usx2y alsa mode is able to achieve 64frames, 4periods, but only at the
+         cost of easier triggered i.e. aeolus xruns (128 or 256frames,
+         2periods works but is useless cause of crackling).
+ 
+ This is a first "proof of concept" implementation.
+ Later, funcionalities should migrate to more apropriate places:
+ Userland:
+ - The jackd could mmap its float-pcm buffers directly from alsa-lib.
+ - alsa-lib could provide power of 2 period sized shaping combined with int/float
+   conversation.
+   Currently the usx2y jack driver provides above 2 services.
+ Kernel:
+ - rawusb dma pcm buffer transport should go to snd-usb-lib, so also snd-usb-audio
+   devices can use it.
+   Currently rawusb dma pcm buffer transport (this file) is only available to snd-usb-usx2y. 
+*/
+
+#include "usbusx2yaudio.c"
+
+#if defined(USX2Y_NRPACKS_VARIABLE) || (!defined(USX2Y_NRPACKS_VARIABLE) &&  USX2Y_NRPACKS == 1)
+
+#include <sound/hwdep.h>
+
+
+static int usX2Y_usbpcm_urb_capt_retire(snd_usX2Y_substream_t *subs)
+{
+	struct urb	*urb = subs->completed_urb;
+	snd_pcm_runtime_t *runtime = subs->pcm_substream->runtime;
+	int 		i, lens = 0, hwptr_done = subs->hwptr_done;
+	usX2Ydev_t	*usX2Y = subs->usX2Y;
+	if (0 > usX2Y->hwdep_pcm_shm->capture_iso_start) { //FIXME
+		int head = usX2Y->hwdep_pcm_shm->captured_iso_head + 1;
+		if (head >= ARRAY_SIZE(usX2Y->hwdep_pcm_shm->captured_iso))
+			head = 0;
+		usX2Y->hwdep_pcm_shm->capture_iso_start = head;
+		snd_printdd("cap start %i\n", head);
+	}
+	for (i = 0; i < nr_of_packs(); i++) {
+		if (urb->iso_frame_desc[i].status) { /* active? hmm, skip this */
+			snd_printk("activ frame status %i. Most propably some hardware problem.\n", urb->iso_frame_desc[i].status);
+			return urb->iso_frame_desc[i].status;
+		}
+		lens += urb->iso_frame_desc[i].actual_length / usX2Y->stride;
+	}
+	if ((hwptr_done += lens) >= runtime->buffer_size)
+		hwptr_done -= runtime->buffer_size;
+	subs->hwptr_done = hwptr_done;
+	subs->transfer_done += lens;
+	/* update the pointer, call callback if necessary */
+	if (subs->transfer_done >= runtime->period_size) {
+		subs->transfer_done -= runtime->period_size;
+		snd_pcm_period_elapsed(subs->pcm_substream);
+	}
+	return 0;
+}
+
+static inline int usX2Y_iso_frames_per_buffer(snd_pcm_runtime_t *runtime, usX2Ydev_t * usX2Y)
+{
+	return (runtime->buffer_size * 1000) / usX2Y->rate + 1;	//FIXME: so far only correct period_size == 2^x ?
+}
+
+/*
+ * prepare urb for playback data pipe
+ *
+ * we copy the data directly from the pcm buffer.
+ * the current position to be copied is held in hwptr field.
+ * since a urb can handle only a single linear buffer, if the total
+ * transferred area overflows the buffer boundary, we cannot send
+ * it directly from the buffer.  thus the data is once copied to
+ * a temporary buffer and urb points to that.
+ */
+static int usX2Y_hwdep_urb_play_prepare(snd_usX2Y_substream_t *subs,
+				  struct urb *urb)
+{
+	int count, counts, pack;
+	usX2Ydev_t *usX2Y = subs->usX2Y;
+	struct snd_usX2Y_hwdep_pcm_shm *shm = usX2Y->hwdep_pcm_shm;
+	snd_pcm_runtime_t *runtime = subs->pcm_substream->runtime;
+
+	if (0 > shm->playback_iso_start) {
+		shm->playback_iso_start = shm->captured_iso_head -
+			usX2Y_iso_frames_per_buffer(runtime, usX2Y);
+		if (0 > shm->playback_iso_start)
+			shm->playback_iso_start += ARRAY_SIZE(shm->captured_iso);
+		shm->playback_iso_head = shm->playback_iso_start;
+	}
+
+	count = 0;
+	for (pack = 0; pack < nr_of_packs(); pack++) {
+		/* calculate the size of a packet */
+		counts = shm->captured_iso[shm->playback_iso_head].length / usX2Y->stride;
+		if (counts < 43 || counts > 50) {
+			snd_printk("should not be here with counts=%i\n", counts);
+			return -EPIPE;
+		}
+		/* set up descriptor */
+		urb->iso_frame_desc[pack].offset = shm->captured_iso[shm->playback_iso_head].offset;
+		urb->iso_frame_desc[pack].length = shm->captured_iso[shm->playback_iso_head].length;
+		if (atomic_read(&subs->state) != state_RUNNING)
+			memset((char *)urb->transfer_buffer + urb->iso_frame_desc[pack].offset, 0,
+			       urb->iso_frame_desc[pack].length);
+		if (++shm->playback_iso_head >= ARRAY_SIZE(shm->captured_iso))
+			shm->playback_iso_head = 0;
+		count += counts;
+	}
+	urb->transfer_buffer_length = count * usX2Y->stride;
+	return 0;
+}
+
+
+static inline void usX2Y_usbpcm_urb_capt_iso_advance(snd_usX2Y_substream_t *subs, struct urb *urb)
+{
+	int pack;
+	for (pack = 0; pack < nr_of_packs(); ++pack) {
+		struct usb_iso_packet_descriptor *desc = urb->iso_frame_desc + pack;
+		if (NULL != subs) {
+			snd_usX2Y_hwdep_pcm_shm_t *shm = subs->usX2Y->hwdep_pcm_shm;
+			int head = shm->captured_iso_head + 1;
+			if (head >= ARRAY_SIZE(shm->captured_iso))
+				head = 0;
+			shm->captured_iso[head].frame = urb->start_frame + pack;
+			shm->captured_iso[head].offset = desc->offset;
+			shm->captured_iso[head].length = desc->actual_length;
+			shm->captured_iso_head = head;
+			shm->captured_iso_frames++;
+		}
+		if ((desc->offset += desc->length * NRURBS*nr_of_packs()) +
+		    desc->length >= SSS)
+			desc->offset -= (SSS - desc->length);
+	}
+}
+
+static inline int usX2Y_usbpcm_usbframe_complete(snd_usX2Y_substream_t *capsubs,
+					   snd_usX2Y_substream_t *capsubs2,
+					   snd_usX2Y_substream_t *playbacksubs, int frame)
+{
+	int err, state;
+	struct urb *urb = playbacksubs->completed_urb;
+
+	state = atomic_read(&playbacksubs->state);
+	if (NULL != urb) {
+		if (state == state_RUNNING)
+			usX2Y_urb_play_retire(playbacksubs, urb);
+		else
+			if (state >= state_PRERUNNING) {
+				atomic_inc(&playbacksubs->state);
+			}
+	} else {
+		switch (state) {
+		case state_STARTING1:
+			urb = playbacksubs->urb[0];
+			atomic_inc(&playbacksubs->state);
+			break;
+		case state_STARTING2:
+			urb = playbacksubs->urb[1];
+			atomic_inc(&playbacksubs->state);
+			break;
+		}
+	}
+	if (urb) {
+		if ((err = usX2Y_hwdep_urb_play_prepare(playbacksubs, urb)) ||
+		    (err = usX2Y_urb_submit(playbacksubs, urb, frame))) {
+			return err;
+		}
+	}
+	
+	playbacksubs->completed_urb = NULL;
+
+	state = atomic_read(&capsubs->state);
+	if (state >= state_PREPARED) {
+		if (state == state_RUNNING) {
+			if ((err = usX2Y_usbpcm_urb_capt_retire(capsubs)))
+				return err;
+		} else {
+			if (state >= state_PRERUNNING)
+				atomic_inc(&capsubs->state);
+		}
+		usX2Y_usbpcm_urb_capt_iso_advance(capsubs, capsubs->completed_urb);
+		if (NULL != capsubs2)
+			usX2Y_usbpcm_urb_capt_iso_advance(NULL, capsubs2->completed_urb);
+		if ((err = usX2Y_urb_submit(capsubs, capsubs->completed_urb, frame)))
+			return err;
+		if (NULL != capsubs2)
+			if ((err = usX2Y_urb_submit(capsubs2, capsubs2->completed_urb, frame)))
+				return err;
+	}
+	capsubs->completed_urb = NULL;
+	if (NULL != capsubs2)
+		capsubs2->completed_urb = NULL;
+	return 0;
+}
+
+
+static void i_usX2Y_usbpcm_urb_complete(struct urb *urb, struct pt_regs *regs)
+{
+	snd_usX2Y_substream_t *subs = (snd_usX2Y_substream_t*)urb->context;
+	usX2Ydev_t *usX2Y = subs->usX2Y;
+	snd_usX2Y_substream_t *capsubs, *capsubs2, *playbacksubs;
+
+	if (unlikely(atomic_read(&subs->state) < state_PREPARED)) {
+		snd_printdd("hcd_frame=%i ep=%i%s status=%i start_frame=%i\n", usb_get_current_frame_number(usX2Y->chip.dev), subs->endpoint, usb_pipein(urb->pipe) ? "in" : "out", urb->status, urb->start_frame);
+		return;
+	}
+	if (unlikely(urb->status)) {
+		usX2Y_error_urb_status(usX2Y, subs, urb);
+		return;
+	}
+	if (likely((0xFFFF & urb->start_frame) == usX2Y->wait_iso_frame))
+		subs->completed_urb = urb;
+	else {
+		usX2Y_error_sequence(usX2Y, subs, urb);
+		return;
+	}
+
+	capsubs = usX2Y->subs[SNDRV_PCM_STREAM_CAPTURE];
+	capsubs2 = usX2Y->subs[SNDRV_PCM_STREAM_CAPTURE + 2];
+	playbacksubs = usX2Y->subs[SNDRV_PCM_STREAM_PLAYBACK];
+	if (capsubs->completed_urb && atomic_read(&capsubs->state) >= state_PREPARED &&
+	    (NULL == capsubs2 || capsubs2->completed_urb) &&
+	    (playbacksubs->completed_urb || atomic_read(&playbacksubs->state) < state_PREPARED)) {
+		if (!usX2Y_usbpcm_usbframe_complete(capsubs, capsubs2, playbacksubs, urb->start_frame)) {
+			if (nr_of_packs() <= urb->start_frame &&
+			    urb->start_frame <= (2 * nr_of_packs() - 1))	// uhci and ohci
+				usX2Y->wait_iso_frame = urb->start_frame - nr_of_packs();
+			else
+				usX2Y->wait_iso_frame +=  nr_of_packs();
+		} else {
+			snd_printdd("\n");
+			usX2Y_clients_stop(usX2Y);
+		}
+	}
+}
+
+
+static void usX2Y_hwdep_urb_release(struct urb** urb)
+{
+	usb_kill_urb(*urb);
+	usb_free_urb(*urb);
+	*urb = NULL;
+}
+
+/*
+ * release a substream
+ */
+static void usX2Y_usbpcm_urbs_release(snd_usX2Y_substream_t *subs)
+{
+	int i;
+	snd_printdd("snd_usX2Y_urbs_release() %i\n", subs->endpoint);
+	for (i = 0; i < NRURBS; i++)
+		usX2Y_hwdep_urb_release(subs->urb + i);
+}
+
+static void usX2Y_usbpcm_subs_startup_finish(usX2Ydev_t * usX2Y)
+{
+	usX2Y_urbs_set_complete(usX2Y, i_usX2Y_usbpcm_urb_complete);
+	usX2Y->prepare_subs = NULL;
+}
+
+static void i_usX2Y_usbpcm_subs_startup(struct urb *urb, struct pt_regs *regs)
+{
+	snd_usX2Y_substream_t *subs = (snd_usX2Y_substream_t*)urb->context;
+	usX2Ydev_t *usX2Y = subs->usX2Y;
+	snd_usX2Y_substream_t *prepare_subs = usX2Y->prepare_subs;
+	if (NULL != prepare_subs &&
+	    urb->start_frame == prepare_subs->urb[0]->start_frame) {
+		atomic_inc(&prepare_subs->state);
+		if (prepare_subs == usX2Y->subs[SNDRV_PCM_STREAM_CAPTURE]) {
+			snd_usX2Y_substream_t *cap_subs2 = usX2Y->subs[SNDRV_PCM_STREAM_CAPTURE + 2];
+			if (cap_subs2 != NULL)
+				atomic_inc(&cap_subs2->state);
+		}
+		usX2Y_usbpcm_subs_startup_finish(usX2Y);
+		wake_up(&usX2Y->prepare_wait_queue);
+	}
+
+	i_usX2Y_usbpcm_urb_complete(urb, regs);
+}
+
+/*
+ * initialize a substream's urbs
+ */
+static int usX2Y_usbpcm_urbs_allocate(snd_usX2Y_substream_t *subs)
+{
+	int i;
+	unsigned int pipe;
+	int is_playback = subs == subs->usX2Y->subs[SNDRV_PCM_STREAM_PLAYBACK];
+	struct usb_device *dev = subs->usX2Y->chip.dev;
+
+	pipe = is_playback ? usb_sndisocpipe(dev, subs->endpoint) :
+			usb_rcvisocpipe(dev, subs->endpoint);
+	subs->maxpacksize = usb_maxpacket(dev, pipe, is_playback);
+	if (!subs->maxpacksize)
+		return -EINVAL;
+
+	/* allocate and initialize data urbs */
+	for (i = 0; i < NRURBS; i++) {
+		struct urb** purb = subs->urb + i;
+		if (*purb) {
+			usb_kill_urb(*purb);
+			continue;
+		}
+		*purb = usb_alloc_urb(nr_of_packs(), GFP_KERNEL);
+		if (NULL == *purb) {
+			usX2Y_usbpcm_urbs_release(subs);
+			return -ENOMEM;
+		}
+		(*purb)->transfer_buffer = is_playback ?
+			subs->usX2Y->hwdep_pcm_shm->playback : (
+				subs->endpoint == 0x8 ?
+				subs->usX2Y->hwdep_pcm_shm->capture0x8 :
+				subs->usX2Y->hwdep_pcm_shm->capture0xA);
+
+		(*purb)->dev = dev;
+		(*purb)->pipe = pipe;
+		(*purb)->number_of_packets = nr_of_packs();
+		(*purb)->context = subs;
+		(*purb)->interval = 1;
+		(*purb)->complete = i_usX2Y_usbpcm_subs_startup;
+	}
+	return 0;
+}
+
+/*
+ * free the buffer
+ */
+static int snd_usX2Y_usbpcm_hw_free(snd_pcm_substream_t *substream)
+{
+	snd_pcm_runtime_t *runtime = substream->runtime;
+	snd_usX2Y_substream_t *subs = (snd_usX2Y_substream_t *)runtime->private_data,
+		*cap_subs2 = subs->usX2Y->subs[SNDRV_PCM_STREAM_CAPTURE + 2];
+	down(&subs->usX2Y->prepare_mutex);
+	snd_printdd("snd_usX2Y_usbpcm_hw_free(%p)\n", substream);
+
+	if (SNDRV_PCM_STREAM_PLAYBACK == substream->stream) {
+		snd_usX2Y_substream_t *cap_subs = subs->usX2Y->subs[SNDRV_PCM_STREAM_CAPTURE];
+		atomic_set(&subs->state, state_STOPPED);
+		usX2Y_usbpcm_urbs_release(subs);
+		if (!cap_subs->pcm_substream ||
+		    !cap_subs->pcm_substream->runtime ||
+		    !cap_subs->pcm_substream->runtime->status ||
+		    cap_subs->pcm_substream->runtime->status->state < SNDRV_PCM_STATE_PREPARED) {
+			atomic_set(&cap_subs->state, state_STOPPED);
+			if (NULL != cap_subs2)
+				atomic_set(&cap_subs2->state, state_STOPPED);
+			usX2Y_usbpcm_urbs_release(cap_subs);
+			if (NULL != cap_subs2)
+				usX2Y_usbpcm_urbs_release(cap_subs2);
+		}
+	} else {
+		snd_usX2Y_substream_t *playback_subs = subs->usX2Y->subs[SNDRV_PCM_STREAM_PLAYBACK];
+		if (atomic_read(&playback_subs->state) < state_PREPARED) {
+			atomic_set(&subs->state, state_STOPPED);
+			if (NULL != cap_subs2)
+				atomic_set(&cap_subs2->state, state_STOPPED);
+			usX2Y_usbpcm_urbs_release(subs);
+			if (NULL != cap_subs2)
+				usX2Y_usbpcm_urbs_release(cap_subs2);
+		}
+	}
+	up(&subs->usX2Y->prepare_mutex);
+	return snd_pcm_lib_free_pages(substream);
+}
+
+static void usX2Y_usbpcm_subs_startup(snd_usX2Y_substream_t *subs)
+{
+	usX2Ydev_t * usX2Y = subs->usX2Y;
+	usX2Y->prepare_subs = subs;
+	subs->urb[0]->start_frame = -1;
+	smp_wmb();	// Make shure above modifications are seen by i_usX2Y_subs_startup()
+	usX2Y_urbs_set_complete(usX2Y, i_usX2Y_usbpcm_subs_startup);
+}
+
+static int usX2Y_usbpcm_urbs_start(snd_usX2Y_substream_t *subs)
+{
+	int	p, u, err,
+		stream = subs->pcm_substream->stream;
+	usX2Ydev_t *usX2Y = subs->usX2Y;
+
+	if (SNDRV_PCM_STREAM_CAPTURE == stream) {
+		usX2Y->hwdep_pcm_shm->captured_iso_head = -1;
+		usX2Y->hwdep_pcm_shm->captured_iso_frames = 0;
+	}
+
+	for (p = 0; 3 >= (stream + p); p += 2) {
+		snd_usX2Y_substream_t *subs = usX2Y->subs[stream + p];
+		if (subs != NULL) {
+			if ((err = usX2Y_usbpcm_urbs_allocate(subs)) < 0)
+				return err;
+			subs->completed_urb = NULL;
+		}
+	}
+
+	for (p = 0; p < 4; p++) {
+		snd_usX2Y_substream_t *subs = usX2Y->subs[p];
+		if (subs != NULL && atomic_read(&subs->state) >= state_PREPARED)
+			goto start;
+	}
+	usX2Y->wait_iso_frame = -1;
+
+ start:
+	usX2Y_usbpcm_subs_startup(subs);
+	for (u = 0; u < NRURBS; u++) {
+		for (p = 0; 3 >= (stream + p); p += 2) {
+			snd_usX2Y_substream_t *subs = usX2Y->subs[stream + p];
+			if (subs != NULL) {
+				struct urb *urb = subs->urb[u];
+				if (usb_pipein(urb->pipe)) {
+					unsigned long pack;
+					if (0 == u)
+						atomic_set(&subs->state, state_STARTING3);
+					urb->dev = usX2Y->chip.dev;
+					urb->transfer_flags = URB_ISO_ASAP;
+					for (pack = 0; pack < nr_of_packs(); pack++) {
+						urb->iso_frame_desc[pack].offset = subs->maxpacksize * (pack + u * nr_of_packs());
+						urb->iso_frame_desc[pack].length = subs->maxpacksize;
+					}
+					urb->transfer_buffer_length = subs->maxpacksize * nr_of_packs(); 
+					if ((err = usb_submit_urb(urb, GFP_KERNEL)) < 0) {
+						snd_printk (KERN_ERR "cannot usb_submit_urb() for urb %d, err = %d\n", u, err);
+						err = -EPIPE;
+						goto cleanup;
+					}  else {
+						snd_printdd("%i\n", urb->start_frame);
+						if (0 > usX2Y->wait_iso_frame)
+							usX2Y->wait_iso_frame = urb->start_frame;
+					}
+					urb->transfer_flags = 0;
+				} else {
+					atomic_set(&subs->state, state_STARTING1);
+					break;
+				}			
+			}
+		}
+	}
+	err = 0;
+	wait_event(usX2Y->prepare_wait_queue, NULL == usX2Y->prepare_subs);
+	if (atomic_read(&subs->state) != state_PREPARED)
+		err = -EPIPE;
+		
+ cleanup:
+	if (err) {
+		usX2Y_subs_startup_finish(usX2Y);	// Call it now
+		usX2Y_clients_stop(usX2Y);		// something is completely wroong > stop evrything			
+	}
+	return err;
+}
+
+/*
+ * prepare callback
+ *
+ * set format and initialize urbs
+ */
+static int snd_usX2Y_usbpcm_prepare(snd_pcm_substream_t *substream)
+{
+	snd_pcm_runtime_t *runtime = substream->runtime;
+	snd_usX2Y_substream_t *subs = (snd_usX2Y_substream_t *)runtime->private_data;
+	usX2Ydev_t *usX2Y = subs->usX2Y;
+	snd_usX2Y_substream_t *capsubs = subs->usX2Y->subs[SNDRV_PCM_STREAM_CAPTURE];
+	int err = 0;
+	snd_printdd("snd_usX2Y_pcm_prepare(%p)\n", substream);
+
+	if (NULL == usX2Y->hwdep_pcm_shm) {
+		if (NULL == (usX2Y->hwdep_pcm_shm = snd_malloc_pages(sizeof(snd_usX2Y_hwdep_pcm_shm_t), GFP_KERNEL)))
+			return -ENOMEM;
+		memset(usX2Y->hwdep_pcm_shm, 0, sizeof(snd_usX2Y_hwdep_pcm_shm_t));
+	}
+
+	down(&usX2Y->prepare_mutex);
+	usX2Y_subs_prepare(subs);
+// Start hardware streams
+// SyncStream first....
+	if (atomic_read(&capsubs->state) < state_PREPARED) {
+		if (usX2Y->format != runtime->format)
+			if ((err = usX2Y_format_set(usX2Y, runtime->format)) < 0)
+				goto up_prepare_mutex;
+		if (usX2Y->rate != runtime->rate)
+			if ((err = usX2Y_rate_set(usX2Y, runtime->rate)) < 0)
+				goto up_prepare_mutex;
+		snd_printdd("starting capture pipe for %s\n", subs == capsubs ? "self" : "playpipe");
+		if (0 > (err = usX2Y_usbpcm_urbs_start(capsubs)))
+			goto up_prepare_mutex;
+	}
+
+	if (subs != capsubs) {
+		usX2Y->hwdep_pcm_shm->playback_iso_start = -1;
+		if (atomic_read(&subs->state) < state_PREPARED) {
+			while (usX2Y_iso_frames_per_buffer(runtime, usX2Y) > usX2Y->hwdep_pcm_shm->captured_iso_frames) {
+				signed long timeout;
+				snd_printd("Wait: iso_frames_per_buffer=%i,captured_iso_frames=%i\n", usX2Y_iso_frames_per_buffer(runtime, usX2Y), usX2Y->hwdep_pcm_shm->captured_iso_frames);
+				set_current_state(TASK_INTERRUPTIBLE);
+				timeout = schedule_timeout(HZ/100 + 1);
+				if (signal_pending(current)) {
+					err = -ERESTARTSYS;
+					goto up_prepare_mutex;
+				}
+			} 
+			if (0 > (err = usX2Y_usbpcm_urbs_start(subs)))
+				goto up_prepare_mutex;
+		}
+		snd_printd("Ready: iso_frames_per_buffer=%i,captured_iso_frames=%i\n", usX2Y_iso_frames_per_buffer(runtime, usX2Y), usX2Y->hwdep_pcm_shm->captured_iso_frames);
+	} else
+		usX2Y->hwdep_pcm_shm->capture_iso_start = -1;
+
+ up_prepare_mutex:
+	up(&usX2Y->prepare_mutex);
+	return err;
+}
+
+static snd_pcm_hardware_t snd_usX2Y_4c =
+{
+	.info =			(SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
+				 SNDRV_PCM_INFO_BLOCK_TRANSFER |
+				 SNDRV_PCM_INFO_MMAP_VALID),
+	.formats =                 SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_3LE,
+	.rates =                   SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000,
+	.rate_min =                44100,
+	.rate_max =                48000,
+	.channels_min =            2,
+	.channels_max =            4,
+	.buffer_bytes_max =	(2*128*1024),
+	.period_bytes_min =	64,
+	.period_bytes_max =	(128*1024),
+	.periods_min =		2,
+	.periods_max =		1024,
+	.fifo_size =              0
+};
+
+
+
+static int snd_usX2Y_usbpcm_open(snd_pcm_substream_t *substream)
+{
+	snd_usX2Y_substream_t	*subs = ((snd_usX2Y_substream_t **)
+					 snd_pcm_substream_chip(substream))[substream->stream];
+	snd_pcm_runtime_t	*runtime = substream->runtime;
+
+	if (!(subs->usX2Y->chip_status & USX2Y_STAT_CHIP_MMAP_PCM_URBS))
+		return -EBUSY;
+
+	runtime->hw = SNDRV_PCM_STREAM_PLAYBACK == substream->stream ? snd_usX2Y_2c :
+		(subs->usX2Y->subs[3] ? snd_usX2Y_4c : snd_usX2Y_2c);
+	runtime->private_data = subs;
+	subs->pcm_substream = substream;
+	snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_TIME, 1000, 200000);
+	return 0;
+}
+
+
+static int snd_usX2Y_usbpcm_close(snd_pcm_substream_t *substream)
+{
+	snd_pcm_runtime_t *runtime = substream->runtime;
+	snd_usX2Y_substream_t *subs = (snd_usX2Y_substream_t *)runtime->private_data;
+	int err = 0;
+	snd_printd("\n");
+	subs->pcm_substream = NULL;
+	return err;
+}
+
+
+static snd_pcm_ops_t snd_usX2Y_usbpcm_ops = 
+{
+	.open =		snd_usX2Y_usbpcm_open,
+	.close =	snd_usX2Y_usbpcm_close,
+	.ioctl =	snd_pcm_lib_ioctl,
+	.hw_params =	snd_usX2Y_pcm_hw_params,
+	.hw_free =	snd_usX2Y_usbpcm_hw_free,
+	.prepare =	snd_usX2Y_usbpcm_prepare,
+	.trigger =	snd_usX2Y_pcm_trigger,
+	.pointer =	snd_usX2Y_pcm_pointer,
+};
+
+
+static int usX2Y_pcms_lock_check(snd_card_t *card)
+{
+	struct list_head *list;
+	snd_device_t *dev;
+	snd_pcm_t *pcm;
+	int err = 0;
+	list_for_each(list, &card->devices) {
+		dev = snd_device(list);
+		if (dev->type != SNDRV_DEV_PCM)
+			continue;
+		pcm = dev->device_data;
+		down(&pcm->open_mutex);
+	}
+	list_for_each(list, &card->devices) {
+		int s;
+		dev = snd_device(list);
+		if (dev->type != SNDRV_DEV_PCM)
+			continue;
+		pcm = dev->device_data;
+		for (s = 0; s < 2; ++s) {
+			snd_pcm_substream_t *substream;
+			substream = pcm->streams[s].substream;
+			if (substream && substream->open_flag)
+				err = -EBUSY;
+		}
+	}
+	return err;
+}
+
+
+static void usX2Y_pcms_unlock(snd_card_t *card)
+{
+	struct list_head *list;
+	snd_device_t *dev;
+	snd_pcm_t *pcm;
+	list_for_each(list, &card->devices) {
+		dev = snd_device(list);
+		if (dev->type != SNDRV_DEV_PCM)
+			continue;
+		pcm = dev->device_data;
+		up(&pcm->open_mutex);
+	}
+}
+
+
+static int snd_usX2Y_hwdep_pcm_open(snd_hwdep_t *hw, struct file *file)
+{
+	// we need to be the first 
+	snd_card_t *card = hw->card;
+	int err = usX2Y_pcms_lock_check(card);
+	if (0 == err)
+		usX2Y(card)->chip_status |= USX2Y_STAT_CHIP_MMAP_PCM_URBS;
+	usX2Y_pcms_unlock(card);
+	return err;
+}
+
+
+static int snd_usX2Y_hwdep_pcm_release(snd_hwdep_t *hw, struct file *file)
+{
+	snd_card_t *card = hw->card;
+	int err = usX2Y_pcms_lock_check(card);
+	if (0 == err)
+		usX2Y(hw->card)->chip_status &= ~USX2Y_STAT_CHIP_MMAP_PCM_URBS;
+	usX2Y_pcms_unlock(card);
+	return err;
+}
+
+
+static void snd_usX2Y_hwdep_pcm_vm_open(struct vm_area_struct *area)
+{
+}
+
+
+static void snd_usX2Y_hwdep_pcm_vm_close(struct vm_area_struct *area)
+{
+}
+
+
+static struct page * snd_usX2Y_hwdep_pcm_vm_nopage(struct vm_area_struct *area, unsigned long address, int *type)
+{
+	unsigned long offset;
+	struct page *page;
+	void *vaddr;
+
+	offset = area->vm_pgoff << PAGE_SHIFT;
+	offset += address - area->vm_start;
+	snd_assert((offset % PAGE_SIZE) == 0, return NOPAGE_OOM);
+	vaddr = (char*)((usX2Ydev_t*)area->vm_private_data)->hwdep_pcm_shm + offset;
+	page = virt_to_page(vaddr);
+
+	if (type)
+		*type = VM_FAULT_MINOR;
+
+	return page;
+}
+
+
+static struct vm_operations_struct snd_usX2Y_hwdep_pcm_vm_ops = {
+	.open = snd_usX2Y_hwdep_pcm_vm_open,
+	.close = snd_usX2Y_hwdep_pcm_vm_close,
+	.nopage = snd_usX2Y_hwdep_pcm_vm_nopage,
+};
+
+
+static int snd_usX2Y_hwdep_pcm_mmap(snd_hwdep_t * hw, struct file *filp, struct vm_area_struct *area)
+{
+	unsigned long	size = (unsigned long)(area->vm_end - area->vm_start);
+	usX2Ydev_t	*usX2Y = (usX2Ydev_t*)hw->private_data;
+
+	if (!(((usX2Ydev_t*)hw->private_data)->chip_status & USX2Y_STAT_CHIP_INIT))
+		return -EBUSY;
+
+	/* if userspace tries to mmap beyond end of our buffer, fail */ 
+	if (size > PAGE_ALIGN(sizeof(snd_usX2Y_hwdep_pcm_shm_t))) {
+		snd_printd("%lu > %lu\n", size, (unsigned long)sizeof(snd_usX2Y_hwdep_pcm_shm_t)); 
+		return -EINVAL;
+	}
+
+	if (!usX2Y->hwdep_pcm_shm) {
+		return -ENODEV;
+	}
+	area->vm_ops = &snd_usX2Y_hwdep_pcm_vm_ops;
+	area->vm_flags |= VM_RESERVED;
+	snd_printd("vm_flags=0x%lX\n", area->vm_flags);
+	area->vm_private_data = hw->private_data;
+	return 0;
+}
+
+
+static void snd_usX2Y_hwdep_pcm_private_free(snd_hwdep_t *hwdep)
+{
+	usX2Ydev_t *usX2Y = (usX2Ydev_t *)hwdep->private_data;
+	if (NULL != usX2Y->hwdep_pcm_shm)
+		snd_free_pages(usX2Y->hwdep_pcm_shm, sizeof(snd_usX2Y_hwdep_pcm_shm_t));
+}
+
+
+static void snd_usX2Y_usbpcm_private_free(snd_pcm_t *pcm)
+{
+	snd_pcm_lib_preallocate_free_for_all(pcm);
+}
+
+
+int usX2Y_hwdep_pcm_new(snd_card_t* card)
+{
+	int err;
+	snd_hwdep_t *hw;
+	snd_pcm_t *pcm;
+	struct usb_device *dev = usX2Y(card)->chip.dev;
+	if (1 != nr_of_packs())
+		return 0;
+
+	if ((err = snd_hwdep_new(card, SND_USX2Y_USBPCM_ID, 1, &hw)) < 0) {
+		snd_printd("\n");
+		return err;
+	}
+	hw->iface = SNDRV_HWDEP_IFACE_USX2Y_PCM;
+	hw->private_data = usX2Y(card);
+	hw->private_free = snd_usX2Y_hwdep_pcm_private_free;
+	hw->ops.open = snd_usX2Y_hwdep_pcm_open;
+	hw->ops.release = snd_usX2Y_hwdep_pcm_release;
+	hw->ops.mmap = snd_usX2Y_hwdep_pcm_mmap;
+	hw->exclusive = 1;
+	sprintf(hw->name, "/proc/bus/usb/%03d/%03d/hwdeppcm", dev->bus->busnum, dev->devnum);
+
+	err = snd_pcm_new(card, NAME_ALLCAPS" hwdep Audio", 2, 1, 1, &pcm);
+	if (err < 0) {
+		return err;
+	}
+	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_usX2Y_usbpcm_ops);
+	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_usX2Y_usbpcm_ops);
+
+	pcm->private_data = usX2Y(card)->subs;
+	pcm->private_free = snd_usX2Y_usbpcm_private_free;
+	pcm->info_flags = 0;
+
+	sprintf(pcm->name, NAME_ALLCAPS" hwdep Audio");
+	if (0 > (err = snd_pcm_lib_preallocate_pages(pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream,
+						     SNDRV_DMA_TYPE_CONTINUOUS,
+						     snd_dma_continuous_data(GFP_KERNEL),
+						     64*1024, 128*1024)) ||
+	    0 > (err = snd_pcm_lib_preallocate_pages(pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream,
+	    					     SNDRV_DMA_TYPE_CONTINUOUS,
+	    					     snd_dma_continuous_data(GFP_KERNEL),
+						     64*1024, 128*1024))) {
+		snd_usX2Y_usbpcm_private_free(pcm);
+		return err;
+	}
+
+
+	return 0;
+}
+
+#else
+
+int usX2Y_hwdep_pcm_new(snd_card_t* card)
+{
+	return 0;
+}
+
+#endif
diff --git a/sound/usb/usx2y/usx2yhwdeppcm.h b/sound/usb/usx2y/usx2yhwdeppcm.h
new file mode 100644
index 00000000000..d68f0cbdbbe
--- /dev/null
+++ b/sound/usb/usx2y/usx2yhwdeppcm.h
@@ -0,0 +1,21 @@
+#define MAXPACK 50
+#define MAXBUFFERMS 100
+#define MAXSTRIDE 3
+
+#define SSS (((MAXPACK*MAXBUFFERMS*MAXSTRIDE + 4096) / 4096) * 4096)
+struct snd_usX2Y_hwdep_pcm_shm {
+	char playback[SSS];
+	char capture0x8[SSS];
+	char capture0xA[SSS];
+	volatile int playback_iso_head;
+	int playback_iso_start;
+	struct {
+		int	frame,
+			offset,
+			length;
+	} captured_iso[128];
+	volatile int captured_iso_head;
+	volatile unsigned captured_iso_frames;
+	int capture_iso_start;
+};
+typedef struct snd_usX2Y_hwdep_pcm_shm snd_usX2Y_hwdep_pcm_shm_t;