Merge branch 'master' of /usr/src/ntfs-2.6/

1 files changed, 0 insertions, 3869 deletions

diff --git a/drivers/usb/class/audio.c b/drivers/usb/class/audio.c
deleted file mode 100644
index 3ad9ee8..0000000
--- a/drivers/usb/class/audio.c
+++ /dev/null
@@ -1,3869 +0,0 @@
-/*****************************************************************************/
-
-/*
- *	audio.c  --  USB Audio Class driver
- *
- *	Copyright (C) 1999, 2000, 2001, 2003, 2004
- *	    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.
- *
- * Debugging:
- * 	Use the 'lsusb' utility to dump the descriptors.
- *
- * 1999-09-07:  Alan Cox
- *		Parsing Audio descriptor patch
- * 1999-09-08:  Thomas Sailer
- *		Added OSS compatible data io functions; both parts of the
- *		driver remain to be glued together
- * 1999-09-10:  Thomas Sailer
- *		Beautified the driver. Added sample format conversions.
- *		Still not properly glued with the parsing code.
- *		The parsing code seems to have its problems btw,
- *		Since it parses all available configs but doesn't
- *		store which iface/altsetting belongs to which config.
- * 1999-09-20:  Thomas Sailer
- *		Threw out Alan's parsing code and implemented my own one.
- *		You cannot reasonnably linearly parse audio descriptors,
- *		especially the AudioClass descriptors have to be considered
- *		pointer lists. Mixer parsing untested, due to lack of device.
- *		First stab at synch pipe implementation, the Dallas USB DAC
- *		wants to use an Asynch out pipe. usb_audio_state now basically
- *		only contains lists of mixer and wave devices. We can therefore
- *		now have multiple mixer/wave devices per USB device.
- * 1999-10-28:  Thomas Sailer
- *		Converted to URB API. Fixed a taskstate/wakeup semantics mistake
- *		that made the driver consume all available CPU cycles.
- *		Now runs stable on UHCI-Acher/Fliegl/Sailer.
- * 1999-10-31:  Thomas Sailer
- *		Audio can now be unloaded if it is not in use by any mixer
- *		or dsp client (formerly you had to disconnect the audio devices
- *		from the USB port)
- *		Finally, about three months after ordering, my "Maxxtro SPK222"
- *		speakers arrived, isn't disdata a great mail order company 8-)
- *		Parse class specific endpoint descriptor of the audiostreaming
- *		interfaces and take the endpoint attributes from there.
- *		Unbelievably, the Philips USB DAC has a sampling rate range
- *		of over a decade, yet does not support the sampling rate control!
- *		No wonder it sounds so bad, has very audible sampling rate
- *		conversion distortion. Don't try to listen to it using
- *		decent headphones!
- *		"Let's make things better" -> but please Philips start with your
- *		own stuff!!!!
- * 1999-11-02:  Thomas Sailer
- *		It takes the Philips boxes several seconds to acquire synchronisation
- *		that means they won't play short sounds. Should probably maintain
- *		the ISO datastream even if there's nothing to play.
- *		Fix counting the total_bytes counter, RealPlayer G2 depends on it.
- * 1999-12-20:  Thomas Sailer
- *		Fix bad bug in conversion to per interface probing.
- *		disconnect was called multiple times for the audio device,
- *		leading to a premature freeing of the audio structures
- * 2000-05-13:  Thomas Sailer
- *		I don't remember who changed the find_format routine,
- *              but the change was completely broken for the Dallas
- *              chip. Anyway taking sampling rate into account in find_format
- *              is bad and should not be done unless there are devices with
- *              completely broken audio descriptors. Unless someone shows
- *              me such a descriptor, I will not allow find_format to
- *              take the sampling rate into account.
- *              Also, the former find_format made:
- *              - mpg123 play mono instead of stereo
- *              - sox completely fail for wav's with sample rates < 44.1kHz
- *                  for the Dallas chip.
- *              Also fix a rather long standing problem with applications that
- *              use "small" writes producing no sound at all.
- * 2000-05-15:  Thomas Sailer
- *		My fears came true, the Philips camera indeed has pretty stupid
- *              audio descriptors.
- * 2000-05-17:  Thomas Sailer
- *		Nemsoft spotted my stupid last minute change, thanks
- * 2000-05-19:  Thomas Sailer
- *		Fixed FEATURE_UNIT thinkos found thanks to the KC Technology
- *              Xtend device. Basically the driver treated FEATURE_UNIT's sourced
- *              by mono terminals as stereo.
- * 2000-05-20:  Thomas Sailer
- *		SELECTOR support (and thus selecting record channels from the mixer).
- *              Somewhat peculiar due to OSS interface limitations. Only works
- *              for channels where a "slider" is already in front of it (i.e.
- *              a MIXER unit or a FEATURE unit with volume capability).
- * 2000-11-26:  Thomas Sailer
- *              Workaround for Dallas DS4201. The DS4201 uses PCM8 as format tag for
- *              its 8 bit modes, but expects signed data (and should therefore have used PCM).
- * 2001-03-10:  Thomas Sailer
- *              provide abs function, prevent picking up a bogus kernel macro
- *              for abs. Bug report by Andrew Morton <andrewm@uow.edu.au>
- * 2001-06-16:  Bryce Nesbitt <bryce@obviously.com>
- *              Fix SNDCTL_DSP_STEREO API violation
- * 2003-04-08:	Oliver Neukum (oliver@neukum.name):
- *		Setting a configuration is done by usbcore and must not be overridden
- * 2004-02-27:  Workaround for broken synch descriptors
- * 2004-03-07:	Alan Stern <stern@rowland.harvard.edu>
- *		Add usb_ifnum_to_if() and usb_altnum_to_altsetting() support.
- *		Use the in-memory descriptors instead of reading them from the device.
- * 
- */
-
-/*
- * Strategy:
- *
- * Alan Cox and Thomas Sailer are starting to dig at opposite ends and
- * are hoping to meet in the middle, just like tunnel diggers :)
- * Alan tackles the descriptor parsing, Thomas the actual data IO and the
- * OSS compatible interface.
- *
- * Data IO implementation issues
- *
- * A mmap'able ring buffer per direction is implemented, because
- * almost every OSS app expects it. It is however impractical to
- * transmit/receive USB data directly into and out of the ring buffer,
- * due to alignment and synchronisation issues. Instead, the ring buffer
- * feeds a constant time delay line that handles the USB issues.
- *
- * Now we first try to find an alternate setting that exactly matches
- * the sample format requested by the user. If we find one, we do not
- * need to perform any sample rate conversions. If there is no matching
- * altsetting, we choose the closest one and perform sample format
- * conversions. We never do sample rate conversion; these are too
- * expensive to be performed in the kernel.
- *
- * Current status: no known HCD-specific issues.
- *
- * Generally: Due to the brokenness of the Audio Class spec
- * it seems generally impossible to write a generic Audio Class driver,
- * so a reasonable driver should implement the features that are actually
- * used.
- *
- * Parsing implementation issues
- *
- * One cannot reasonably parse the AudioClass descriptors linearly.
- * Therefore the current implementation features routines to look
- * for a specific descriptor in the descriptor list.
- *
- * How does the parsing work? First, all interfaces are searched
- * for an AudioControl class interface. If found, the config descriptor
- * that belongs to the current configuration is searched and
- * the HEADER descriptor is found. It contains a list of
- * all AudioStreaming and MIDIStreaming devices. This list is then walked,
- * and all AudioStreaming interfaces are classified into input and output
- * interfaces (according to the endpoint0 direction in altsetting1) (MIDIStreaming
- * is currently not supported). The input & output list is then used
- * to group inputs and outputs together and issued pairwise to the
- * AudioStreaming class parser. Finally, all OUTPUT_TERMINAL descriptors
- * are walked and issued to the mixer construction routine.
- *
- * The AudioStreaming parser simply enumerates all altsettings belonging
- * to the specified interface. It looks for AS_GENERAL and FORMAT_TYPE
- * class specific descriptors to extract the sample format/sample rate
- * data. Only sample format types PCM and PCM8 are supported right now, and
- * only FORMAT_TYPE_I is handled. The isochronous data endpoint needs to
- * be the first endpoint of the interface, and the optional synchronisation
- * isochronous endpoint the second one.
- *
- * Mixer construction works as follows: The various TERMINAL and UNIT
- * descriptors span a tree from the root (OUTPUT_TERMINAL) through the
- * intermediate nodes (UNITs) to the leaves (INPUT_TERMINAL). We walk
- * that tree in a depth first manner. FEATURE_UNITs may contribute volume,
- * bass and treble sliders to the mixer, MIXER_UNITs volume sliders.
- * The terminal type encoded in the INPUT_TERMINALs feeds a heuristic
- * to determine "meaningful" OSS slider numbers, however we will see
- * how well this works in practice. Other features are not used at the
- * moment, they seem less often used. Also, it seems difficult at least
- * to construct recording source switches from SELECTOR_UNITs, but
- * since there are not many USB ADC's available, we leave that for later.
- */
-
-/*****************************************************************************/
-
-#include <linux/kernel.h>
-#include <linux/slab.h>
-#include <linux/string.h>
-#include <linux/timer.h>
-#include <linux/sched.h>
-#include <linux/smp_lock.h>
-#include <linux/module.h>
-#include <linux/sound.h>
-#include <linux/soundcard.h>
-#include <linux/list.h>
-#include <linux/vmalloc.h>
-#include <linux/init.h>
-#include <linux/poll.h>
-#include <linux/bitops.h>
-#include <asm/uaccess.h>
-#include <asm/io.h>
-#include <linux/usb.h>
-
-#include "audio.h"
-
-/*
- * Version Information
- */
-#define DRIVER_VERSION "v1.0.0"
-#define DRIVER_AUTHOR "Alan Cox <alan@lxorguk.ukuu.org.uk>, Thomas Sailer (sailer@ife.ee.ethz.ch)"
-#define DRIVER_DESC "USB Audio Class driver"
-
-#define AUDIO_DEBUG 1
-
-#define SND_DEV_DSP16   5
-
-#define dprintk(x)
-
-/* --------------------------------------------------------------------- */
-
-/*
- * Linked list of all audio devices...
- */
-static struct list_head audiodevs = LIST_HEAD_INIT(audiodevs);
-static DECLARE_MUTEX(open_sem);
-
-/*
- * wait queue for processes wanting to open an USB audio device
- */
-static DECLARE_WAIT_QUEUE_HEAD(open_wait);
-
-
-#define MAXFORMATS        MAX_ALT
-#define DMABUFSHIFT       17  /* 128k worth of DMA buffer */
-#define NRSGBUF           (1U<<(DMABUFSHIFT-PAGE_SHIFT))
-
-/*
- * This influences:
- * - Latency
- * - Interrupt rate
- * - Synchronisation behaviour
- * Don't touch this if you don't understand all of the above.
- */
-#define DESCFRAMES  5
-#define SYNCFRAMES  DESCFRAMES
-
-#define MIXFLG_STEREOIN   1
-#define MIXFLG_STEREOOUT  2
-
-struct mixerchannel {
-	__u16 value;
-	__u16 osschannel;  /* number of the OSS channel */
-	__s16 minval, maxval;
-	__u16 slctunitid;
-	__u8 unitid;
-	__u8 selector;
-	__u8 chnum;
-	__u8 flags;
-};
-
-struct audioformat {
-	unsigned int format;
-	unsigned int sratelo;
-	unsigned int sratehi;
-	unsigned char altsetting;
-	unsigned char attributes;
-};
-
-struct dmabuf {
-	/* buffer data format */
-	unsigned int format;
-	unsigned int srate;
-	/* physical buffer */
-	unsigned char *sgbuf[NRSGBUF];
-	unsigned bufsize;
-	unsigned numfrag;
-	unsigned fragshift;
-	unsigned wrptr, rdptr;
-	unsigned total_bytes;
-	int count;
-	unsigned error; /* over/underrun */
-	wait_queue_head_t wait;
-	/* redundant, but makes calculations easier */
-	unsigned fragsize;
-	unsigned dmasize;
-	/* OSS stuff */
-	unsigned mapped:1;
-	unsigned ready:1;
-	unsigned ossfragshift;
-	int ossmaxfrags;
-	unsigned subdivision;
-};
-
-struct usb_audio_state;
-
-#define FLG_URB0RUNNING   1
-#define FLG_URB1RUNNING   2
-#define FLG_SYNC0RUNNING  4
-#define FLG_SYNC1RUNNING  8
-#define FLG_RUNNING      16
-#define FLG_CONNECTED    32
-
-struct my_data_urb {
-	struct urb *urb;
-};
-
-struct my_sync_urb {
-	struct urb *urb;
-};
-
-
-struct usb_audiodev {
-	struct list_head list;
-	struct usb_audio_state *state;
-	
-	/* soundcore stuff */
-	int dev_audio;
-
-	/* wave stuff */
-	mode_t open_mode;
-	spinlock_t lock;         /* DMA buffer access spinlock */
-
-	struct usbin {
-		int interface;           /* Interface number, -1 means not used */
-		unsigned int format;     /* USB data format */
-		unsigned int datapipe;   /* the data input pipe */
-		unsigned int syncpipe;   /* the synchronisation pipe - 0 for anything but adaptive IN mode */
-		unsigned int syncinterval;  /* P for adaptive IN mode, 0 otherwise */
-		unsigned int freqn;      /* nominal sampling rate in USB format, i.e. fs/1000 in Q10.14 */
-		unsigned int freqmax;    /* maximum sampling rate, used for buffer management */
-		unsigned int phase;      /* phase accumulator */
-		unsigned int flags;      /* see FLG_ defines */
-		
-		struct my_data_urb durb[2];  /* ISO descriptors for the data endpoint */
-		struct my_sync_urb surb[2];  /* ISO sync pipe descriptor if needed */
-		
-		struct dmabuf dma;
-	} usbin;
-
-	struct usbout {
-		int interface;           /* Interface number, -1 means not used */
-		unsigned int format;     /* USB data format */
-		unsigned int datapipe;   /* the data input pipe */
-		unsigned int syncpipe;   /* the synchronisation pipe - 0 for anything but asynchronous OUT mode */
-		unsigned int syncinterval;  /* P for asynchronous OUT mode, 0 otherwise */
-		unsigned int freqn;      /* nominal sampling rate in USB format, i.e. fs/1000 in Q10.14 */
-		unsigned int freqm;      /* momentary sampling rate in USB format, i.e. fs/1000 in Q10.14 */
-		unsigned int freqmax;    /* maximum sampling rate, used for buffer management */
-		unsigned int phase;      /* phase accumulator */
-		unsigned int flags;      /* see FLG_ defines */
-
-		struct my_data_urb durb[2];  /* ISO descriptors for the data endpoint */
-		struct my_sync_urb surb[2];  /* ISO sync pipe descriptor if needed */
-		
-		struct dmabuf dma;
-	} usbout;
-
-
-	unsigned int numfmtin, numfmtout;
-	struct audioformat fmtin[MAXFORMATS];
-	struct audioformat fmtout[MAXFORMATS];
-};  
-
-struct usb_mixerdev {
-	struct list_head list;
-	struct usb_audio_state *state;
-
-	/* soundcore stuff */
-	int dev_mixer;
-
-	unsigned char iface;  /* interface number of the AudioControl interface */
-
-	/* USB format descriptions */
-	unsigned int numch, modcnt;
-
-	/* mixch is last and gets allocated dynamically */
-	struct mixerchannel ch[0];
-};
-
-struct usb_audio_state {
-	struct list_head audiodev;
-
-	/* USB device */
-	struct usb_device *usbdev;
-
-	struct list_head audiolist;
-	struct list_head mixerlist;
-
-	unsigned count;  /* usage counter; NOTE: the usb stack is also considered a user */
-};
-
-/* private audio format extensions */
-#define AFMT_STEREO        0x80000000
-#define AFMT_ISSTEREO(x)   ((x) & AFMT_STEREO)
-#define AFMT_IS16BIT(x)    ((x) & (AFMT_S16_LE|AFMT_S16_BE|AFMT_U16_LE|AFMT_U16_BE))
-#define AFMT_ISUNSIGNED(x) ((x) & (AFMT_U8|AFMT_U16_LE|AFMT_U16_BE))
-#define AFMT_BYTESSHIFT(x) ((AFMT_ISSTEREO(x) ? 1 : 0) + (AFMT_IS16BIT(x) ? 1 : 0))
-#define AFMT_BYTES(x)      (1<<AFMT_BYTESSHFIT(x))
-
-/* --------------------------------------------------------------------- */
-
-static inline unsigned ld2(unsigned int x)
-{
-	unsigned r = 0;
-	
-	if (x >= 0x10000) {
-		x >>= 16;
-		r += 16;
-	}
-	if (x >= 0x100) {
-		x >>= 8;
-		r += 8;
-	}
-	if (x >= 0x10) {
-		x >>= 4;
-		r += 4;
-	}
-	if (x >= 4) {
-		x >>= 2;
-		r += 2;
-	}
-	if (x >= 2)
-		r++;
-	return r;
-}
-
-/* --------------------------------------------------------------------- */
-
-/*
- * OSS compatible ring buffer management. The ring buffer may be mmap'ed into
- * an application address space.
- *
- * I first used the rvmalloc stuff copied from bttv. Alan Cox did not like it, so
- * we now use an array of pointers to a single page each. This saves us the
- * kernel page table manipulations, but we have to do a page table alike mechanism
- * (though only one indirection) in software.
- */
-
-static void dmabuf_release(struct dmabuf *db)
-{
-	unsigned int nr;
-	void *p;
-
-	for(nr = 0; nr < NRSGBUF; nr++) {
-		if (!(p = db->sgbuf[nr]))
-			continue;
-		ClearPageReserved(virt_to_page(p));
-		free_page((unsigned long)p);
-		db->sgbuf[nr] = NULL;
-	}
-	db->mapped = db->ready = 0;
-}
-
-static int dmabuf_init(struct dmabuf *db)
-{
-	unsigned int nr, bytepersec, bufs;
-	void *p;
-
-	/* initialize some fields */
-	db->rdptr = db->wrptr = db->total_bytes = db->count = db->error = 0;
-	/* calculate required buffer size */
-	bytepersec = db->srate << AFMT_BYTESSHIFT(db->format);
-	bufs = 1U << DMABUFSHIFT;
-	if (db->ossfragshift) {
-		if ((1000 << db->ossfragshift) < bytepersec)
-			db->fragshift = ld2(bytepersec/1000);
-		else
-			db->fragshift = db->ossfragshift;
-	} else {
-		db->fragshift = ld2(bytepersec/100/(db->subdivision ? db->subdivision : 1));
-		if (db->fragshift < 3)
-			db->fragshift = 3;
-	}
-	db->numfrag = bufs >> db->fragshift;
-	while (db->numfrag < 4 && db->fragshift > 3) {
-		db->fragshift--;
-		db->numfrag = bufs >> db->fragshift;
-	}
-	db->fragsize = 1 << db->fragshift;
-	if (db->ossmaxfrags >= 4 && db->ossmaxfrags < db->numfrag)
-		db->numfrag = db->ossmaxfrags;
-	db->dmasize = db->numfrag << db->fragshift;
-	for(nr = 0; nr < NRSGBUF; nr++) {
-		if (!db->sgbuf[nr]) {
-			p = (void *)get_zeroed_page(GFP_KERNEL);
-			if (!p)
-				return -ENOMEM;
-			db->sgbuf[nr] = p;
-			SetPageReserved(virt_to_page(p));
-		}
-		memset(db->sgbuf[nr], AFMT_ISUNSIGNED(db->format) ? 0x80 : 0, PAGE_SIZE);
-		if ((nr << PAGE_SHIFT) >= db->dmasize)
-			break;
-	}
-	db->bufsize = nr << PAGE_SHIFT;
-	db->ready = 1;
-	dprintk((KERN_DEBUG "usbaudio: dmabuf_init bytepersec %d bufs %d ossfragshift %d ossmaxfrags %d "
-	         "fragshift %d fragsize %d numfrag %d dmasize %d bufsize %d fmt 0x%x srate %d\n",
-	         bytepersec, bufs, db->ossfragshift, db->ossmaxfrags, db->fragshift, db->fragsize,
-	         db->numfrag, db->dmasize, db->bufsize, db->format, db->srate));
-	return 0;
-}
-
-static int dmabuf_mmap(struct vm_area_struct *vma, struct dmabuf *db, unsigned long start, unsigned long size, pgprot_t prot)
-{
-	unsigned int nr;
-
-	if (!db->ready || db->mapped || (start | size) & (PAGE_SIZE-1) || size > db->bufsize)
-		return -EINVAL;
-	size >>= PAGE_SHIFT;
-	for(nr = 0; nr < size; nr++)
-		if (!db->sgbuf[nr])
-			return -EINVAL;
-	db->mapped = 1;
-	for(nr = 0; nr < size; nr++) {
-		unsigned long pfn;
-
-		pfn = virt_to_phys(db->sgbuf[nr]) >> PAGE_SHIFT;
-		if (remap_pfn_range(vma, start, pfn, PAGE_SIZE, prot))
-			return -EAGAIN;
-		start += PAGE_SIZE;
-	}
-	return 0;
-}
-
-static void dmabuf_copyin(struct dmabuf *db, const void *buffer, unsigned int size)
-{
-	unsigned int pgrem, rem;
-
-	db->total_bytes += size;
-	for (;;) {
-		if (size <= 0)
-			return;
-		pgrem = ((~db->wrptr) & (PAGE_SIZE-1)) + 1;
-		if (pgrem > size)
-			pgrem = size;
-		rem = db->dmasize - db->wrptr;
-		if (pgrem > rem)
-			pgrem = rem;
-		memcpy((db->sgbuf[db->wrptr >> PAGE_SHIFT]) + (db->wrptr & (PAGE_SIZE-1)), buffer, pgrem);
-		size -= pgrem;
-		buffer += pgrem;
-		db->wrptr += pgrem;
-		if (db->wrptr >= db->dmasize)
-			db->wrptr = 0;
-	}
-}
-
-static void dmabuf_copyout(struct dmabuf *db, void *buffer, unsigned int size)
-{
-	unsigned int pgrem, rem;
-
-	db->total_bytes += size;
-	for (;;) {
-		if (size <= 0)
-			return;
-		pgrem = ((~db->rdptr) & (PAGE_SIZE-1)) + 1;
-		if (pgrem > size)
-			pgrem = size;
-		rem = db->dmasize - db->rdptr;
-		if (pgrem > rem)
-			pgrem = rem;
-		memcpy(buffer, (db->sgbuf[db->rdptr >> PAGE_SHIFT]) + (db->rdptr & (PAGE_SIZE-1)), pgrem);
-		size -= pgrem;
-		buffer += pgrem;
-		db->rdptr += pgrem;
-		if (db->rdptr >= db->dmasize)
-			db->rdptr = 0;
-	}
-}
-
-static int dmabuf_copyin_user(struct dmabuf *db, unsigned int ptr, const void __user *buffer, unsigned int size)
-{
-	unsigned int pgrem, rem;
-
-	if (!db->ready || db->mapped)
-		return -EINVAL;
-	for (;;) {
-		if (size <= 0)
-			return 0;
-		pgrem = ((~ptr) & (PAGE_SIZE-1)) + 1;
-		if (pgrem > size)
-			pgrem = size;
-		rem = db->dmasize - ptr;
-		if (pgrem > rem)
-			pgrem = rem;
-		if (copy_from_user((db->sgbuf[ptr >> PAGE_SHIFT]) + (ptr & (PAGE_SIZE-1)), buffer, pgrem))
-			return -EFAULT;
-		size -= pgrem;
-		buffer += pgrem;
-		ptr += pgrem;
-		if (ptr >= db->dmasize)
-			ptr = 0;
-	}
-}
-
-static int dmabuf_copyout_user(struct dmabuf *db, unsigned int ptr, void __user *buffer, unsigned int size)
-{
-	unsigned int pgrem, rem;
-
-	if (!db->ready || db->mapped)
-		return -EINVAL;
-	for (;;) {
-		if (size <= 0)
-			return 0;
-		pgrem = ((~ptr) & (PAGE_SIZE-1)) + 1;
-		if (pgrem > size)
-			pgrem = size;
-		rem = db->dmasize - ptr;
-		if (pgrem > rem)
-			pgrem = rem;
-		if (copy_to_user(buffer, (db->sgbuf[ptr >> PAGE_SHIFT]) + (ptr & (PAGE_SIZE-1)), pgrem))
-			return -EFAULT;
-		size -= pgrem;
-		buffer += pgrem;
-		ptr += pgrem;
-		if (ptr >= db->dmasize)
-			ptr = 0;
-	}
-}
-
-/* --------------------------------------------------------------------- */
-/*
- * USB I/O code. We do sample format conversion if necessary
- */
-
-static void usbin_stop(struct usb_audiodev *as)
-{
-	struct usbin *u = &as->usbin;
-	unsigned long flags;
-	unsigned int i, notkilled = 1;
-
-	spin_lock_irqsave(&as->lock, flags);
-	u->flags &= ~FLG_RUNNING;
-	i = u->flags;
-	spin_unlock_irqrestore(&as->lock, flags);
-	while (i & (FLG_URB0RUNNING|FLG_URB1RUNNING|FLG_SYNC0RUNNING|FLG_SYNC1RUNNING)) {
-		if (notkilled)
-			schedule_timeout_interruptible(1);
-		else
-			schedule_timeout_uninterruptible(1);
-		spin_lock_irqsave(&as->lock, flags);
-		i = u->flags;
-		spin_unlock_irqrestore(&as->lock, flags);
-		if (notkilled && signal_pending(current)) {
-			if (i & FLG_URB0RUNNING)
-				usb_kill_urb(u->durb[0].urb);
-			if (i & FLG_URB1RUNNING)
-				usb_kill_urb(u->durb[1].urb);
-			if (i & FLG_SYNC0RUNNING)
-				usb_kill_urb(u->surb[0].urb);
-			if (i & FLG_SYNC1RUNNING)
-				usb_kill_urb(u->surb[1].urb);
-			notkilled = 0;
-		}
-	}
-	set_current_state(TASK_RUNNING);
-	kfree(u->durb[0].urb->transfer_buffer);
-	kfree(u->durb[1].urb->transfer_buffer);
-	kfree(u->surb[0].urb->transfer_buffer);
-	kfree(u->surb[1].urb->transfer_buffer);
-	u->durb[0].urb->transfer_buffer = u->durb[1].urb->transfer_buffer = 
-		u->surb[0].urb->transfer_buffer = u->surb[1].urb->transfer_buffer = NULL;
-}
-
-static inline void usbin_release(struct usb_audiodev *as)
-{
-	usbin_stop(as);
-}
-
-static void usbin_disc(struct usb_audiodev *as)
-{
-	struct usbin *u = &as->usbin;
-
-	unsigned long flags;
-
-	spin_lock_irqsave(&as->lock, flags);
-	u->flags &= ~(FLG_RUNNING | FLG_CONNECTED);
-	spin_unlock_irqrestore(&as->lock, flags);
-	usbin_stop(as);
-}
-
-static void conversion(const void *ibuf, unsigned int ifmt, void *obuf, unsigned int ofmt, void *tmp, unsigned int scnt)
-{
-	unsigned int cnt, i;
-	__s16 *sp, *sp2, s;
-	unsigned char *bp;
-
-	cnt = scnt;
-	if (AFMT_ISSTEREO(ifmt))
-		cnt <<= 1;
-	sp = ((__s16 *)tmp) + cnt;
-	switch (ifmt & ~AFMT_STEREO) {
-	case AFMT_U8:
-		for (bp = ((unsigned char *)ibuf)+cnt, i = 0; i < cnt; i++) {
-			bp--;
-			sp--;
-			*sp = (*bp ^ 0x80) << 8;
-		}
-		break;
-			
-	case AFMT_S8:
-		for (bp = ((unsigned char *)ibuf)+cnt, i = 0; i < cnt; i++) {
-			bp--;
-			sp--;
-			*sp = *bp << 8;
-		}
-		break;
-		
-	case AFMT_U16_LE:
-		for (bp = ((unsigned char *)ibuf)+2*cnt, i = 0; i < cnt; i++) {
-			bp -= 2;
-			sp--;
-			*sp = (bp[0] | (bp[1] << 8)) ^ 0x8000;
-		}
-		break;
-
-	case AFMT_U16_BE:
-		for (bp = ((unsigned char *)ibuf)+2*cnt, i = 0; i < cnt; i++) {
-			bp -= 2;
-			sp--;
-			*sp = (bp[1] | (bp[0] << 8)) ^ 0x8000;
-		}
-		break;
-
-	case AFMT_S16_LE:
-		for (bp = ((unsigned char *)ibuf)+2*cnt, i = 0; i < cnt; i++) {
-			bp -= 2;
-			sp--;
-			*sp = bp[0] | (bp[1] << 8);
-		}
-		break;
-
-	case AFMT_S16_BE:
-		for (bp = ((unsigned char *)ibuf)+2*cnt, i = 0; i < cnt; i++) {
-			bp -= 2;
-			sp--;
-			*sp = bp[1] | (bp[0] << 8);
-		}
-		break;
-	}
-	if (!AFMT_ISSTEREO(ifmt) && AFMT_ISSTEREO(ofmt)) {
-		/* expand from mono to stereo */
-		for (sp = ((__s16 *)tmp)+scnt, sp2 = ((__s16 *)tmp)+2*scnt, i = 0; i < scnt; i++) {
-			sp--;
-			sp2 -= 2;
-			sp2[0] = sp2[1] = sp[0];
-		}
-	}
-	if (AFMT_ISSTEREO(ifmt) && !AFMT_ISSTEREO(ofmt)) {
-		/* contract from stereo to mono */
-		for (sp = sp2 = ((__s16 *)tmp), i = 0; i < scnt; i++, sp++, sp2 += 2)
-			sp[0] = (sp2[0] + sp2[1]) >> 1;
-	}
-	cnt = scnt;
-	if (AFMT_ISSTEREO(ofmt))
-		cnt <<= 1;
-	sp = ((__s16 *)tmp);
-	bp = ((unsigned char *)obuf);
-	switch (ofmt & ~AFMT_STEREO) {
-	case AFMT_U8:
-		for (i = 0; i < cnt; i++, sp++, bp++)
-			*bp = (*sp >> 8) ^ 0x80;
-		break;
-
-	case AFMT_S8:
-		for (i = 0; i < cnt; i++, sp++, bp++)
-			*bp = *sp >> 8;
-		break;
-
-	case AFMT_U16_LE:
-		for (i = 0; i < cnt; i++, sp++, bp += 2) {
-			s = *sp;
-			bp[0] = s;
-			bp[1] = (s >> 8) ^ 0x80;
-		}
-		break;
-
-	case AFMT_U16_BE:
-		for (i = 0; i < cnt; i++, sp++, bp += 2) {
-			s = *sp;
-			bp[1] = s;
-			bp[0] = (s >> 8) ^ 0x80;
-		}
-		break;
-
-	case AFMT_S16_LE:
-		for (i = 0; i < cnt; i++, sp++, bp += 2) {
-			s = *sp;
-			bp[0] = s;
-			bp[1] = s >> 8;
-		}
-		break;
-
-	case AFMT_S16_BE:
-		for (i = 0; i < cnt; i++, sp++, bp += 2) {
-			s = *sp;
-			bp[1] = s;
-			bp[0] = s >> 8;
-		}
-		break;
-	}
-	
-}
-
-static void usbin_convert(struct usbin *u, unsigned char *buffer, unsigned int samples)
-{
-	union {
-		__s16 s[64];
-		unsigned char b[0];
-	} tmp;
-	unsigned int scnt, maxs, ufmtsh, dfmtsh;
-
-	ufmtsh = AFMT_BYTESSHIFT(u->format);
-	dfmtsh = AFMT_BYTESSHIFT(u->dma.format);
-	maxs = (AFMT_ISSTEREO(u->dma.format | u->format)) ? 32 : 64;
-	while (samples > 0) {
-		scnt = samples;
-		if (scnt > maxs)
-			scnt = maxs;
-		conversion(buffer, u->format, tmp.b, u->dma.format, tmp.b, scnt);
-		dmabuf_copyin(&u->dma, tmp.b, scnt << dfmtsh);
-		buffer += scnt << ufmtsh;
-		samples -= scnt;
-	}
-}		
-
-static int usbin_prepare_desc(struct usbin *u, struct urb *urb)
-{
-	unsigned int i, maxsize, offs;
-
-	maxsize = (u->freqmax + 0x3fff) >> (14 - AFMT_BYTESSHIFT(u->format));
-	//printk(KERN_DEBUG "usbin_prepare_desc: maxsize %d freq 0x%x format 0x%x\n", maxsize, u->freqn, u->format);
-	for (i = offs = 0; i < DESCFRAMES; i++, offs += maxsize) {
-		urb->iso_frame_desc[i].length = maxsize;
-		urb->iso_frame_desc[i].offset = offs;
-	}
-	urb->interval = 1;
-	return 0;
-}
-
-/*
- * return value: 0 if descriptor should be restarted, -1 otherwise
- * convert sample format on the fly if necessary
- */
-static int usbin_retire_desc(struct usbin *u, struct urb *urb)
-{
-	unsigned int i, ufmtsh, dfmtsh, err = 0, cnt, scnt, dmafree;
-	unsigned char *cp;
-
-	ufmtsh = AFMT_BYTESSHIFT(u->format);
-	dfmtsh = AFMT_BYTESSHIFT(u->dma.format);
-	for (i = 0; i < DESCFRAMES; i++) {
-		cp = ((unsigned char *)urb->transfer_buffer) + urb->iso_frame_desc[i].offset;
-		if (urb->iso_frame_desc[i].status) {
-			dprintk((KERN_DEBUG "usbin_retire_desc: frame %u status %d\n", i, urb->iso_frame_desc[i].status));
-			continue;
-		}
-		scnt = urb->iso_frame_desc[i].actual_length >> ufmtsh;
-		if (!scnt)
-			continue;
-		cnt = scnt << dfmtsh;
-		if (!u->dma.mapped) {
-			dmafree = u->dma.dmasize - u->dma.count;
-			if (cnt > dmafree) {
-				scnt = dmafree >> dfmtsh;
-				cnt = scnt << dfmtsh;
-				err++;
-			}
-		}
-		u->dma.count += cnt;
-		if (u->format == u->dma.format) {
-			/* we do not need format conversion */
-			dprintk((KERN_DEBUG "usbaudio: no sample format conversion\n"));
-			dmabuf_copyin(&u->dma, cp, cnt);
-		} else {
-			/* we need sampling format conversion */
-			dprintk((KERN_DEBUG "usbaudio: sample format conversion %x != %x\n", u->format, u->dma.format));
-			usbin_convert(u, cp, scnt);
-		}
-	}
-	if (err)
-		u->dma.error++;
-	if (u->dma.count >= (signed)u->dma.fragsize)
-		wake_up(&u->dma.wait);
-	return err ? -1 : 0;
-}
-
-static void usbin_completed(struct urb *urb, struct pt_regs *regs)
-{
-	struct usb_audiodev *as = (struct usb_audiodev *)urb->context;
-	struct usbin *u = &as->usbin;
-	unsigned long flags;
-	unsigned int mask;
-	int suret = 0;
-
-#if 0
-	printk(KERN_DEBUG "usbin_completed: status %d errcnt %d flags 0x%x\n", urb->status, urb->error_count, u->flags);
-#endif
-	if (urb == u->durb[0].urb)
-		mask = FLG_URB0RUNNING;
-	else if (urb == u->durb[1].urb)
-		mask = FLG_URB1RUNNING;
-	else {
-		mask = 0;
-		printk(KERN_ERR "usbin_completed: panic: unknown URB\n");
-	}
-	urb->dev = as->state->usbdev;
-	spin_lock_irqsave(&as->lock, flags);
-	if (!usbin_retire_desc(u, urb) &&
-	    u->flags & FLG_RUNNING &&
-	    !usbin_prepare_desc(u, urb) && 
-	    (suret = usb_submit_urb(urb, GFP_ATOMIC)) == 0) {
-		u->flags |= mask;
-	} else {
-		u->flags &= ~(mask | FLG_RUNNING);
-		wake_up(&u->dma.wait);
-		printk(KERN_DEBUG "usbin_completed: descriptor not restarted (usb_submit_urb: %d)\n", suret);
-	}
-	spin_unlock_irqrestore(&as->lock, flags);
-}
-
-/*
- * we output sync data
- */
-static int usbin_sync_prepare_desc(struct usbin *u, struct urb *urb)
-{
-	unsigned char *cp = urb->transfer_buffer;
-	unsigned int i, offs;
-	
-	for (i = offs = 0; i < SYNCFRAMES; i++, offs += 3, cp += 3) {
-		urb->iso_frame_desc[i].length = 3;
-		urb->iso_frame_desc[i].offset = offs;
-		cp[0] = u->freqn;
-		cp[1] = u->freqn >> 8;
-		cp[2] = u->freqn >> 16;
-	}
-	urb->interval = 1;
-	return 0;
-}
-
-/*
- * return value: 0 if descriptor should be restarted, -1 otherwise
- */
-static int usbin_sync_retire_desc(struct usbin *u, struct urb *urb)
-{
-	unsigned int i;
-	
-	for (i = 0; i < SYNCFRAMES; i++)
-		if (urb->iso_frame_desc[0].status)
-			dprintk((KERN_DEBUG "usbin_sync_retire_desc: frame %u status %d\n", i, urb->iso_frame_desc[i].status));
-	return 0;
-}
-
-static void usbin_sync_completed(struct urb *urb, struct pt_regs *regs)
-{
-	struct usb_audiodev *as = (struct usb_audiodev *)urb->context;
-	struct usbin *u = &as->usbin;
-	unsigned long flags;
-	unsigned int mask;
-	int suret = 0;
-
-#if 0
-	printk(KERN_DEBUG "usbin_sync_completed: status %d errcnt %d flags 0x%x\n", urb->status, urb->error_count, u->flags);
-#endif
-	if (urb == u->surb[0].urb)
-		mask = FLG_SYNC0RUNNING;
-	else if (urb == u->surb[1].urb)
-		mask = FLG_SYNC1RUNNING;
-	else {
-		mask = 0;
-		printk(KERN_ERR "usbin_sync_completed: panic: unknown URB\n");
-	}
-	urb->dev = as->state->usbdev;
-	spin_lock_irqsave(&as->lock, flags);
-	if (!usbin_sync_retire_desc(u, urb) &&
-	    u->flags & FLG_RUNNING &&
-	    !usbin_sync_prepare_desc(u, urb) && 
-	    (suret = usb_submit_urb(urb, GFP_ATOMIC)) == 0) {
-		u->flags |= mask;
-	} else {
-		u->flags &= ~(mask | FLG_RUNNING);
-		wake_up(&u->dma.wait);
-		dprintk((KERN_DEBUG "usbin_sync_completed: descriptor not restarted (usb_submit_urb: %d)\n", suret));
-	}
-	spin_unlock_irqrestore(&as->lock, flags);
-}
-
-static int usbin_start(struct usb_audiodev *as)
-{
-	struct usb_device *dev = as->state->usbdev;
-	struct usbin *u = &as->usbin;
-	struct urb *urb;
-	unsigned long flags;
-	unsigned int maxsze, bufsz;
-
-#if 0
-	printk(KERN_DEBUG "usbin_start: device %d ufmt 0x%08x dfmt 0x%08x srate %d\n",
-	       dev->devnum, u->format, u->dma.format, u->dma.srate);
-#endif
-	/* allocate USB storage if not already done */
-	spin_lock_irqsave(&as->lock, flags);
-	if (!(u->flags & FLG_CONNECTED)) {
-		spin_unlock_irqrestore(&as->lock, flags);
-		return -EIO;
-	}
-	if (!(u->flags & FLG_RUNNING)) {
-		spin_unlock_irqrestore(&as->lock, flags);
-		u->freqn = ((u->dma.srate << 11) + 62) / 125; /* this will overflow at approx 2MSPS */
-		u->freqmax = u->freqn + (u->freqn >> 2);
-		u->phase = 0;
-		maxsze = (u->freqmax + 0x3fff) >> (14 - AFMT_BYTESSHIFT(u->format));
-		bufsz = DESCFRAMES * maxsze;
-		kfree(u->durb[0].urb->transfer_buffer);
-		u->durb[0].urb->transfer_buffer = kmalloc(bufsz, GFP_KERNEL);
-		u->durb[0].urb->transfer_buffer_length = bufsz;
-		kfree(u->durb[1].urb->transfer_buffer);
-		u->durb[1].urb->transfer_buffer = kmalloc(bufsz, GFP_KERNEL);
-		u->durb[1].urb->transfer_buffer_length = bufsz;
-		if (u->syncpipe) {
-			kfree(u->surb[0].urb->transfer_buffer);
-			u->surb[0].urb->transfer_buffer = kmalloc(3*SYNCFRAMES, GFP_KERNEL);
-			u->surb[0].urb->transfer_buffer_length = 3*SYNCFRAMES;
-			kfree(u->surb[1].urb->transfer_buffer);
-			u->surb[1].urb->transfer_buffer = kmalloc(3*SYNCFRAMES, GFP_KERNEL);
-			u->surb[1].urb->transfer_buffer_length = 3*SYNCFRAMES;
-		}
-		if (!u->durb[0].urb->transfer_buffer || !u->durb[1].urb->transfer_buffer || 
-		    (u->syncpipe && (!u->surb[0].urb->transfer_buffer || !u->surb[1].urb->transfer_buffer))) {
-			printk(KERN_ERR "usbaudio: cannot start playback device %d\n", dev->devnum);
-			return 0;
-		}
-		spin_lock_irqsave(&as->lock, flags);
-	}
-	if (u->dma.count >= u->dma.dmasize && !u->dma.mapped) {
-		spin_unlock_irqrestore(&as->lock, flags);
-		return 0;
-	}
-	u->flags |= FLG_RUNNING;
-	if (!(u->flags & FLG_URB0RUNNING)) {
-		urb = u->durb[0].urb;
-		urb->dev = dev;
-		urb->pipe = u->datapipe;
-		urb->transfer_flags = URB_ISO_ASAP;
-		urb->number_of_packets = DESCFRAMES;
-		urb->context = as;
-		urb->complete = usbin_completed;
-		if (!usbin_prepare_desc(u, urb) && !usb_submit_urb(urb, GFP_KERNEL))
-			u->flags |= FLG_URB0RUNNING;
-		else
-			u->flags &= ~FLG_RUNNING;
-	}
-	if (u->flags & FLG_RUNNING && !(u->flags & FLG_URB1RUNNING)) {
-		urb = u->durb[1].urb;
-		urb->dev = dev;
-		urb->pipe = u->datapipe;
-		urb->transfer_flags = URB_ISO_ASAP;
-		urb->number_of_packets = DESCFRAMES;
-		urb->context = as;
-		urb->complete = usbin_completed;
-		if (!usbin_prepare_desc(u, urb) && !usb_submit_urb(urb, GFP_KERNEL))
-			u->flags |= FLG_URB1RUNNING;
-		else
-			u->flags &= ~FLG_RUNNING;
-	}
-	if (u->syncpipe) {
-		if (u->flags & FLG_RUNNING && !(u->flags & FLG_SYNC0RUNNING)) {
-			urb = u->surb[0].urb;
-			urb->dev = dev;
-			urb->pipe = u->syncpipe;
-			urb->transfer_flags = URB_ISO_ASAP;
-			urb->number_of_packets = SYNCFRAMES;
-			urb->context = as;
-			urb->complete = usbin_sync_completed;
-			/* stride: u->syncinterval */
-			if (!usbin_sync_prepare_desc(u, urb) && !usb_submit_urb(urb, GFP_KERNEL))
-				u->flags |= FLG_SYNC0RUNNING;
-			else
-				u->flags &= ~FLG_RUNNING;
-		}
-		if (u->flags & FLG_RUNNING && !(u->flags & FLG_SYNC1RUNNING)) {
-			urb = u->surb[1].urb;
-			urb->dev = dev;
-			urb->pipe = u->syncpipe;
-			urb->transfer_flags = URB_ISO_ASAP;
-			urb->number_of_packets = SYNCFRAMES;
-			urb->context = as;
-			urb->complete = usbin_sync_completed;
-			/* stride: u->syncinterval */
-			if (!usbin_sync_prepare_desc(u, urb) && !usb_submit_urb(urb, GFP_KERNEL))
-				u->flags |= FLG_SYNC1RUNNING;
-			else
-				u->flags &= ~FLG_RUNNING;
-		}
-	}
-	spin_unlock_irqrestore(&as->lock, flags);
-	return 0;
-}
-
-static void usbout_stop(struct usb_audiodev *as)
-{
-	struct usbout *u = &as->usbout;
-	unsigned long flags;
-	unsigned int i, notkilled = 1;
-
-	spin_lock_irqsave(&as->lock, flags);
-	u->flags &= ~FLG_RUNNING;
-	i = u->flags;
-	spin_unlock_irqrestore(&as->lock, flags);
-	while (i & (FLG_URB0RUNNING|FLG_URB1RUNNING|FLG_SYNC0RUNNING|FLG_SYNC1RUNNING)) {
-		if (notkilled)
-			schedule_timeout_interruptible(1);
-		else
-			schedule_timeout_uninterruptible(1);
-		spin_lock_irqsave(&as->lock, flags);
-		i = u->flags;
-		spin_unlock_irqrestore(&as->lock, flags);
-		if (notkilled && signal_pending(current)) {
-			if (i & FLG_URB0RUNNING)
-				usb_kill_urb(u->durb[0].urb);
-			if (i & FLG_URB1RUNNING)
-				usb_kill_urb(u->durb[1].urb);
-			if (i & FLG_SYNC0RUNNING)
-				usb_kill_urb(u->surb[0].urb);
-			if (i & FLG_SYNC1RUNNING)
-				usb_kill_urb(u->surb[1].urb);
-			notkilled = 0;
-		}
-	}
-	set_current_state(TASK_RUNNING);
-	kfree(u->durb[0].urb->transfer_buffer);
-	kfree(u->durb[1].urb->transfer_buffer);
-	kfree(u->surb[0].urb->transfer_buffer);
-	kfree(u->surb[1].urb->transfer_buffer);
-	u->durb[0].urb->transfer_buffer = u->durb[1].urb->transfer_buffer = 
-		u->surb[0].urb->transfer_buffer = u->surb[1].urb->transfer_buffer = NULL;
-}
-
-static inline void usbout_release(struct usb_audiodev *as)
-{
-	usbout_stop(as);
-}
-
-static void usbout_disc(struct usb_audiodev *as)
-{
-	struct usbout *u = &as->usbout;
-	unsigned long flags;
-
-	spin_lock_irqsave(&as->lock, flags);
-	u->flags &= ~(FLG_RUNNING | FLG_CONNECTED);
-	spin_unlock_irqrestore(&as->lock, flags);
-	usbout_stop(as);
-}
-
-static void usbout_convert(struct usbout *u, unsigned char *buffer, unsigned int samples)
-{
-	union {
-		__s16 s[64];
-		unsigned char b[0];
-	} tmp;
-	unsigned int scnt, maxs, ufmtsh, dfmtsh;
-
-	ufmtsh = AFMT_BYTESSHIFT(u->format);
-	dfmtsh = AFMT_BYTESSHIFT(u->dma.format);
-	maxs = (AFMT_ISSTEREO(u->dma.format | u->format)) ? 32 : 64;
-	while (samples > 0) {
-		scnt = samples;
-		if (scnt > maxs)
-			scnt = maxs;
-		dmabuf_copyout(&u->dma, tmp.b, scnt << dfmtsh);
-		conversion(tmp.b, u->dma.format, buffer, u->format, tmp.b, scnt);
-		buffer += scnt << ufmtsh;
-		samples -= scnt;
-	}
-}		
-
-static int usbout_prepare_desc(struct usbout *u, struct urb *urb)
-{
-	unsigned int i, ufmtsh, dfmtsh, err = 0, cnt, scnt, offs;
-	unsigned char *cp = urb->transfer_buffer;
-
-	ufmtsh = AFMT_BYTESSHIFT(u->format);
-	dfmtsh = AFMT_BYTESSHIFT(u->dma.format);
-	for (i = offs = 0; i < DESCFRAMES; i++) {
-		urb->iso_frame_desc[i].offset = offs;
-		u->phase = (u->phase & 0x3fff) + u->freqm;
-		scnt = u->phase >> 14;
-		if (!scnt) {
-			urb->iso_frame_desc[i].length = 0;
-			continue;
-		}
-		cnt = scnt << dfmtsh;
-		if (!u->dma.mapped) {
-			if (cnt > u->dma.count) {
-				scnt = u->dma.count >> dfmtsh;
-				cnt = scnt << dfmtsh;
-				err++;
-			}
-			u->dma.count -= cnt;
-		} else
-			u->dma.count += cnt;
-		if (u->format == u->dma.format) {
-			/* we do not need format conversion */
-			dmabuf_copyout(&u->dma, cp, cnt);
-		} else {
-			/* we need sampling format conversion */
-			usbout_convert(u, cp, scnt);
-		}
-		cnt = scnt << ufmtsh;
-		urb->iso_frame_desc[i].length = cnt;
-		offs += cnt;
-		cp += cnt;
-	}
-	urb->interval = 1;
-	if (err)
-		u->dma.error++;
-	if (u->dma.mapped) {
-		if (u->dma.count >= (signed)u->dma.fragsize)
-			wake_up(&u->dma.wait);
-	} else {
-		if ((signed)u->dma.dmasize >= u->dma.count + (signed)u->dma.fragsize)
-			wake_up(&u->dma.wait);
-	}
-	return err ? -1 : 0;
-}
-
-/*
- * return value: 0 if descriptor should be restarted, -1 otherwise
- */
-static int usbout_retire_desc(struct usbout *u, struct urb *urb)
-{
-	unsigned int i;
-
-	for (i = 0; i < DESCFRAMES; i++) {
-		if (urb->iso_frame_desc[i].status) {
-			dprintk((KERN_DEBUG "usbout_retire_desc: frame %u status %d\n", i, urb->iso_frame_desc[i].status));
-			continue;
-		}
-	}
-	return 0;
-}
-
-static void usbout_completed(struct urb *urb, struct pt_regs *regs)
-{
-	struct usb_audiodev *as = (struct usb_audiodev *)urb->context;
-	struct usbout *u = &as->usbout;
-	unsigned long flags;
-	unsigned int mask;
-	int suret = 0;
-
-#if 0
-	printk(KERN_DEBUG "usbout_completed: status %d errcnt %d flags 0x%x\n", urb->status, urb->error_count, u->flags);
-#endif
-	if (urb == u->durb[0].urb)
-		mask = FLG_URB0RUNNING;
-	else if (urb == u->durb[1].urb)
-		mask = FLG_URB1RUNNING;
-	else {
-		mask = 0;
-		printk(KERN_ERR "usbout_completed: panic: unknown URB\n");
-	}
-	urb->dev = as->state->usbdev;
-	spin_lock_irqsave(&as->lock, flags);
-	if (!usbout_retire_desc(u, urb) &&
-	    u->flags & FLG_RUNNING &&
-	    !usbout_prepare_desc(u, urb) && 
-	    (suret = usb_submit_urb(urb, GFP_ATOMIC)) == 0) {
-		u->flags |= mask;
-	} else {
-		u->flags &= ~(mask | FLG_RUNNING);
-		wake_up(&u->dma.wait);
-		dprintk((KERN_DEBUG "usbout_completed: descriptor not restarted (usb_submit_urb: %d)\n", suret));
-	}
-	spin_unlock_irqrestore(&as->lock, flags);
-}
-
-static int usbout_sync_prepare_desc(struct usbout *u, struct urb *urb)
-{
-	unsigned int i, offs;
-
-	for (i = offs = 0; i < SYNCFRAMES; i++, offs += 3) {
-		urb->iso_frame_desc[i].length = 3;
-		urb->iso_frame_desc[i].offset = offs;
-	}
-	urb->interval = 1;
-	return 0;
-}
-
-/*
- * return value: 0 if descriptor should be restarted, -1 otherwise
- */
-static int usbout_sync_retire_desc(struct usbout *u, struct urb *urb)
-{
-	unsigned char *cp = urb->transfer_buffer;
-	unsigned int f, i;
-
-	for (i = 0; i < SYNCFRAMES; i++, cp += 3) {
-		if (urb->iso_frame_desc[i].status) {
-			dprintk((KERN_DEBUG "usbout_sync_retire_desc: frame %u status %d\n", i, urb->iso_frame_desc[i].status));
-			continue;
-		}
-		if (urb->iso_frame_desc[i].actual_length < 3) {
-			dprintk((KERN_DEBUG "usbout_sync_retire_desc: frame %u length %d\n", i, urb->iso_frame_desc[i].actual_length));
-			continue;
-		}
-		f = cp[0] | (cp[1] << 8) | (cp[2] << 16);
-		if (abs(f - u->freqn) > (u->freqn >> 3) || f > u->freqmax) {
-			printk(KERN_WARNING "usbout_sync_retire_desc: requested frequency %u (nominal %u) out of range!\n", f, u->freqn);
-			continue;
-		}
-		u->freqm = f;
-	}
-	return 0;
-}
-
-static void usbout_sync_completed(struct urb *urb, struct pt_regs *regs)
-{
-	struct usb_audiodev *as = (struct usb_audiodev *)urb->context;
-	struct usbout *u = &as->usbout;
-	unsigned long flags;
-	unsigned int mask;
-	int suret = 0;
-
-#if 0
-	printk(KERN_DEBUG "usbout_sync_completed: status %d errcnt %d flags 0x%x\n", urb->status, urb->error_count, u->flags);
-#endif
-	if (urb == u->surb[0].urb)
-		mask = FLG_SYNC0RUNNING;
-	else if (urb == u->surb[1].urb)
-		mask = FLG_SYNC1RUNNING;
-	else {
-		mask = 0;
-		printk(KERN_ERR "usbout_sync_completed: panic: unknown URB\n");
-	}
-	urb->dev = as->state->usbdev;
-	spin_lock_irqsave(&as->lock, flags);
-	if (!usbout_sync_retire_desc(u, urb) &&
-	    u->flags & FLG_RUNNING &&
-	    !usbout_sync_prepare_desc(u, urb) && 
-	    (suret = usb_submit_urb(urb, GFP_ATOMIC)) == 0) {
-		u->flags |= mask;
-	} else {
-		u->flags &= ~(mask | FLG_RUNNING);
-		wake_up(&u->dma.wait);
-		dprintk((KERN_DEBUG "usbout_sync_completed: descriptor not restarted (usb_submit_urb: %d)\n", suret));
-	}
-	spin_unlock_irqrestore(&as->lock, flags);
-}
-
-static int usbout_start(struct usb_audiodev *as)
-{
-	struct usb_device *dev = as->state->usbdev;
-	struct usbout *u = &as->usbout;
-	struct urb *urb;
-	unsigned long flags;
-	unsigned int maxsze, bufsz;
-
-#if 0
-	printk(KERN_DEBUG "usbout_start: device %d ufmt 0x%08x dfmt 0x%08x srate %d\n",
-	       dev->devnum, u->format, u->dma.format, u->dma.srate);
-#endif
-	/* allocate USB storage if not already done */
-	spin_lock_irqsave(&as->lock, flags);
-	if (!(u->flags & FLG_CONNECTED)) {
-		spin_unlock_irqrestore(&as->lock, flags);
-		return -EIO;
-	}
-	if (!(u->flags & FLG_RUNNING)) {
-		spin_unlock_irqrestore(&as->lock, flags);
-		u->freqn = u->freqm = ((u->dma.srate << 11) + 62) / 125; /* this will overflow at approx 2MSPS */
-		u->freqmax = u->freqn + (u->freqn >> 2);
-		u->phase = 0;
-		maxsze = (u->freqmax + 0x3fff) >> (14 - AFMT_BYTESSHIFT(u->format));
-		bufsz = DESCFRAMES * maxsze;
-		kfree(u->durb[0].urb->transfer_buffer);
-		u->durb[0].urb->transfer_buffer = kmalloc(bufsz, GFP_KERNEL);
-		u->durb[0].urb->transfer_buffer_length = bufsz;
-		kfree(u->durb[1].urb->transfer_buffer);
-		u->durb[1].urb->transfer_buffer = kmalloc(bufsz, GFP_KERNEL);
-		u->durb[1].urb->transfer_buffer_length = bufsz;
-		if (u->syncpipe) {
-			kfree(u->surb[0].urb->transfer_buffer);
-			u->surb[0].urb->transfer_buffer = kmalloc(3*SYNCFRAMES, GFP_KERNEL);
-			u->surb[0].urb->transfer_buffer_length = 3*SYNCFRAMES;
-			kfree(u->surb[1].urb->transfer_buffer);
-			u->surb[1].urb->transfer_buffer = kmalloc(3*SYNCFRAMES, GFP_KERNEL);
-			u->surb[1].urb->transfer_buffer_length = 3*SYNCFRAMES;
-		}
-		if (!u->durb[0].urb->transfer_buffer || !u->durb[1].urb->transfer_buffer || 
-		    (u->syncpipe && (!u->surb[0].urb->transfer_buffer || !u->surb[1].urb->transfer_buffer))) {
-			printk(KERN_ERR "usbaudio: cannot start playback device %d\n", dev->devnum);
-			return 0;
-		}
-		spin_lock_irqsave(&as->lock, flags);
-	}
-	if (u->dma.count <= 0 && !u->dma.mapped) {
-		spin_unlock_irqrestore(&as->lock, flags);
-		return 0;
-	}
-       	u->flags |= FLG_RUNNING;
-	if (!(u->flags & FLG_URB0RUNNING)) {
-		urb = u->durb[0].urb;
-		urb->dev = dev;
-		urb->pipe = u->datapipe;
-		urb->transfer_flags = URB_ISO_ASAP;
-		urb->number_of_packets = DESCFRAMES;
-		urb->context = as;
-		urb->complete = usbout_completed;
-		if (!usbout_prepare_desc(u, urb) && !usb_submit_urb(urb, GFP_ATOMIC))
-			u->flags |= FLG_URB0RUNNING;
-		else
-			u->flags &= ~FLG_RUNNING;
-	}
-	if (u->flags & FLG_RUNNING && !(u->flags & FLG_URB1RUNNING)) {
-		urb = u->durb[1].urb;
-		urb->dev = dev;
-		urb->pipe = u->datapipe;
-		urb->transfer_flags = URB_ISO_ASAP;
-		urb->number_of_packets = DESCFRAMES;
-		urb->context = as;
-		urb->complete = usbout_completed;
-		if (!usbout_prepare_desc(u, urb) && !usb_submit_urb(urb, GFP_ATOMIC))
-			u->flags |= FLG_URB1RUNNING;
-		else
-			u->flags &= ~FLG_RUNNING;
-	}
-	if (u->syncpipe) {
-		if (u->flags & FLG_RUNNING && !(u->flags & FLG_SYNC0RUNNING)) {
-			urb = u->surb[0].urb;
-			urb->dev = dev;
-			urb->pipe = u->syncpipe;
-			urb->transfer_flags = URB_ISO_ASAP;
-			urb->number_of_packets = SYNCFRAMES;
-			urb->context = as;
-			urb->complete = usbout_sync_completed;
-			/* stride: u->syncinterval */
-			if (!usbout_sync_prepare_desc(u, urb) && !usb_submit_urb(urb, GFP_ATOMIC))
-				u->flags |= FLG_SYNC0RUNNING;
-			else
-				u->flags &= ~FLG_RUNNING;
-		}
-		if (u->flags & FLG_RUNNING && !(u->flags & FLG_SYNC1RUNNING)) {
-			urb = u->surb[1].urb;
-			urb->dev = dev;
-			urb->pipe = u->syncpipe;
-			urb->transfer_flags = URB_ISO_ASAP;
-			urb->number_of_packets = SYNCFRAMES;
-			urb->context = as;
-			urb->complete = usbout_sync_completed;
-			/* stride: u->syncinterval */
-			if (!usbout_sync_prepare_desc(u, urb) && !usb_submit_urb(urb, GFP_ATOMIC))
-				u->flags |= FLG_SYNC1RUNNING;
-			else
-				u->flags &= ~FLG_RUNNING;
-		}
-	}
-	spin_unlock_irqrestore(&as->lock, flags);
-	return 0;
-}
-
-/* --------------------------------------------------------------------- */
-
-static unsigned int format_goodness(struct audioformat *afp, unsigned int fmt, unsigned int srate)
-{
-	unsigned int g = 0;
-
-	if (srate < afp->sratelo)
-		g += afp->sratelo - srate;
-	if (srate > afp->sratehi)
-		g += srate - afp->sratehi;
-	if (AFMT_ISSTEREO(afp->format) && !AFMT_ISSTEREO(fmt))
-		g += 0x100000;
-	if (!AFMT_ISSTEREO(afp->format) && AFMT_ISSTEREO(fmt))
-		g += 0x400000;
-	if (AFMT_IS16BIT(afp->format) && !AFMT_IS16BIT(fmt))
-		g += 0x100000;
-	if (!AFMT_IS16BIT(afp->format) && AFMT_IS16BIT(fmt))
-		g += 0x400000;
-	return g;
-}
-
-static int find_format(struct audioformat *afp, unsigned int nr, unsigned int fmt, unsigned int srate)
-{
-	unsigned int i, g, gb = ~0;
-	int j = -1; /* default to failure */
-
-	/* find "best" format (according to format_goodness) */
-	for (i = 0; i < nr; i++) {
-		g = format_goodness(&afp[i], fmt, srate);
-		if (g >= gb) 
-			continue;
-		j = i;
-		gb = g;
-	}
-       	return j;
-}
-
-static int set_format_in(struct usb_audiodev *as)
-{
-	struct usb_device *dev = as->state->usbdev;
-	struct usb_host_interface *alts;
-	struct usb_interface *iface;
-	struct usbin *u = &as->usbin;
-	struct dmabuf *d = &u->dma;
-	struct audioformat *fmt;
-	unsigned int ep;
-	unsigned char data[3];
-	int fmtnr, ret;
-
-	iface = usb_ifnum_to_if(dev, u->interface);
-	if (!iface)
-		return 0;
-
-	fmtnr = find_format(as->fmtin, as->numfmtin, d->format, d->srate);
-	if (fmtnr < 0) {
-		printk(KERN_ERR "usbaudio: set_format_in(): failed to find desired format/speed combination.\n");
-		return -1;
-	}
-
-	fmt = as->fmtin + fmtnr;
-	alts = usb_altnum_to_altsetting(iface, fmt->altsetting);
-	u->format = fmt->format;
-	u->datapipe = usb_rcvisocpipe(dev, alts->endpoint[0].desc.bEndpointAddress & 0xf);
-	u->syncpipe = u->syncinterval = 0;
-	if ((alts->endpoint[0].desc.bmAttributes & 0x0c) == 0x08) {
-		if (alts->desc.bNumEndpoints < 2 ||
-		    alts->endpoint[1].desc.bmAttributes != 0x01 ||
-		    alts->endpoint[1].desc.bSynchAddress != 0 ||
-		    alts->endpoint[1].desc.bEndpointAddress != (alts->endpoint[0].desc.bSynchAddress & 0x7f)) {
-			printk(KERN_WARNING "usbaudio: device %d interface %d altsetting %d claims adaptive in "
-			       "but has invalid synch pipe; treating as asynchronous in\n",
-			       dev->devnum, u->interface, fmt->altsetting);
-		} else {
-			u->syncpipe = usb_sndisocpipe(dev, alts->endpoint[1].desc.bEndpointAddress & 0xf);
-			u->syncinterval = alts->endpoint[1].desc.bRefresh;
-		}
-	}
-	if (d->srate < fmt->sratelo)
-		d->srate = fmt->sratelo;
-	if (d->srate > fmt->sratehi)
-		d->srate = fmt->sratehi;
-	dprintk((KERN_DEBUG "usbaudio: set_format_in: usb_set_interface %u %u\n",
-			u->interface, fmt->altsetting));
-	if (usb_set_interface(dev, alts->desc.bInterfaceNumber, fmt->altsetting) < 0) {
-		printk(KERN_WARNING "usbaudio: usb_set_interface failed, device %d interface %d altsetting %d\n",
-		       dev->devnum, u->interface, fmt->altsetting);
-		return -1;
-	}
-	if (fmt->sratelo == fmt->sratehi)
-		return 0;
-	ep = usb_pipeendpoint(u->datapipe) | (u->datapipe & USB_DIR_IN);
-	/* if endpoint has pitch control, enable it */
-	if (fmt->attributes & 0x02) {
-		data[0] = 1;
-		if ((ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), SET_CUR, USB_TYPE_CLASS|USB_RECIP_ENDPOINT|USB_DIR_OUT, 
-					   PITCH_CONTROL << 8, ep, data, 1, 1000)) < 0) {
-			printk(KERN_ERR "usbaudio: failure (error %d) to set output pitch control device %d interface %u endpoint 0x%x to %u\n",
-			       ret, dev->devnum, u->interface, ep, d->srate);
-			return -1;
-		}
-	}
-	/* if endpoint has sampling rate control, set it */
-	if (fmt->attributes & 0x01) {
-		data[0] = d->srate;
-		data[1] = d->srate >> 8;
-		data[2] = d->srate >> 16;
-		if ((ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), SET_CUR, USB_TYPE_CLASS|USB_RECIP_ENDPOINT|USB_DIR_OUT, 
-					   SAMPLING_FREQ_CONTROL << 8, ep, data, 3, 1000)) < 0) {
-			printk(KERN_ERR "usbaudio: failure (error %d) to set input sampling frequency device %d interface %u endpoint 0x%x to %u\n",
-			       ret, dev->devnum, u->interface, ep, d->srate);
-			return -1;
-		}
-		if ((ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), GET_CUR, USB_TYPE_CLASS|USB_RECIP_ENDPOINT|USB_DIR_IN,
-					   SAMPLING_FREQ_CONTROL << 8, ep, data, 3, 1000)) < 0) {
-			printk(KERN_ERR "usbaudio: failure (error %d) to get input sampling frequency device %d interface %u endpoint 0x%x\n",
-			       ret, dev->devnum, u->interface, ep);
-			return -1;
-		}
-		dprintk((KERN_DEBUG "usbaudio: set_format_in: device %d interface %d altsetting %d srate req: %u real %u\n",
-		        dev->devnum, u->interface, fmt->altsetting, d->srate, data[0] | (data[1] << 8) | (data[2] << 16)));
-		d->srate = data[0] | (data[1] << 8) | (data[2] << 16);
-	}
-	dprintk((KERN_DEBUG "usbaudio: set_format_in: USB format 0x%x, DMA format 0x%x srate %u\n", u->format, d->format, d->srate));
-	return 0;
-}
-
-static int set_format_out(struct usb_audiodev *as)
-{
-	struct usb_device *dev = as->state->usbdev;
-	struct usb_host_interface *alts;
-	struct usb_interface *iface;	
-	struct usbout *u = &as->usbout;
-	struct dmabuf *d = &u->dma;
-	struct audioformat *fmt;
-	unsigned int ep;
-	unsigned char data[3];
-	int fmtnr, ret;
-
-	iface = usb_ifnum_to_if(dev, u->interface);
-	if (!iface)
-		return 0;
-
-	fmtnr = find_format(as->fmtout, as->numfmtout, d->format, d->srate);
-	if (fmtnr < 0) {
-		printk(KERN_ERR "usbaudio: set_format_out(): failed to find desired format/speed combination.\n");
-		return -1;
-	}
-
-	fmt = as->fmtout + fmtnr;
-	u->format = fmt->format;
-	alts = usb_altnum_to_altsetting(iface, fmt->altsetting);
-	u->datapipe = usb_sndisocpipe(dev, alts->endpoint[0].desc.bEndpointAddress & 0xf);
-	u->syncpipe = u->syncinterval = 0;
-	if ((alts->endpoint[0].desc.bmAttributes & 0x0c) == 0x04) {
-#if 0
-		printk(KERN_DEBUG "bNumEndpoints 0x%02x endpoint[1].bmAttributes 0x%02x\n"
-		       KERN_DEBUG "endpoint[1].bSynchAddress 0x%02x endpoint[1].bEndpointAddress 0x%02x\n"
-		       KERN_DEBUG "endpoint[0].bSynchAddress 0x%02x\n", alts->bNumEndpoints,
-		       alts->endpoint[1].bmAttributes, alts->endpoint[1].bSynchAddress,
-		       alts->endpoint[1].bEndpointAddress, alts->endpoint[0].bSynchAddress);
-#endif
-		if (alts->desc.bNumEndpoints < 2 ||
-		    alts->endpoint[1].desc.bmAttributes != 0x01 ||
-		    alts->endpoint[1].desc.bSynchAddress != 0 ||
-		    alts->endpoint[1].desc.bEndpointAddress != (alts->endpoint[0].desc.bSynchAddress | 0x80)) {
-			printk(KERN_WARNING "usbaudio: device %d interface %d altsetting %d claims asynch out "
-			       "but has invalid synch pipe; treating as adaptive out\n",
-			       dev->devnum, u->interface, fmt->altsetting);
-		} else {
-			u->syncpipe = usb_rcvisocpipe(dev, alts->endpoint[1].desc.bEndpointAddress & 0xf);
-			u->syncinterval = alts->endpoint[1].desc.bRefresh;
-		}
-	}
-	if (d->srate < fmt->sratelo)
-		d->srate = fmt->sratelo;
-	if (d->srate > fmt->sratehi)
-		d->srate = fmt->sratehi;
-	dprintk((KERN_DEBUG "usbaudio: set_format_out: usb_set_interface %u %u\n",
-			u->interface, fmt->altsetting));
-	if (usb_set_interface(dev, u->interface, fmt->altsetting) < 0) {
-		printk(KERN_WARNING "usbaudio: usb_set_interface failed, device %d interface %d altsetting %d\n",
-		       dev->devnum, u->interface, fmt->altsetting);
-		return -1;
-	}
-	if (fmt->sratelo == fmt->sratehi)
-		return 0;
-	ep = usb_pipeendpoint(u->datapipe) | (u->datapipe & USB_DIR_IN);
-	/* if endpoint has pitch control, enable it */
-	if (fmt->attributes & 0x02) {
-		data[0] = 1;
-		if ((ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), SET_CUR, USB_TYPE_CLASS|USB_RECIP_ENDPOINT|USB_DIR_OUT, 
-					   PITCH_CONTROL << 8, ep, data, 1, 1000)) < 0) {
-			printk(KERN_ERR "usbaudio: failure (error %d) to set output pitch control device %d interface %u endpoint 0x%x to %u\n",
-			       ret, dev->devnum, u->interface, ep, d->srate);
-			return -1;
-		}
-	}
-	/* if endpoint has sampling rate control, set it */
-	if (fmt->attributes & 0x01) {
-		data[0] = d->srate;
-		data[1] = d->srate >> 8;
-		data[2] = d->srate >> 16;
-		if ((ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), SET_CUR, USB_TYPE_CLASS|USB_RECIP_ENDPOINT|USB_DIR_OUT, 
-					   SAMPLING_FREQ_CONTROL << 8, ep, data, 3, 1000)) < 0) {
-			printk(KERN_ERR "usbaudio: failure (error %d) to set output sampling frequency device %d interface %u endpoint 0x%x to %u\n",
-			       ret, dev->devnum, u->interface, ep, d->srate);
-			return -1;
-		}
-		if ((ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), GET_CUR, USB_TYPE_CLASS|USB_RECIP_ENDPOINT|USB_DIR_IN,
-					   SAMPLING_FREQ_CONTROL << 8, ep, data, 3, 1000)) < 0) {
-			printk(KERN_ERR "usbaudio: failure (error %d) to get output sampling frequency device %d interface %u endpoint 0x%x\n",
-			       ret, dev->devnum, u->interface, ep);
-			return -1;
-		}
-		dprintk((KERN_DEBUG "usbaudio: set_format_out: device %d interface %d altsetting %d srate req: %u real %u\n",
-		        dev->devnum, u->interface, fmt->altsetting, d->srate, data[0] | (data[1] << 8) | (data[2] << 16)));
-		d->srate = data[0] | (data[1] << 8) | (data[2] << 16);
-	}
-	dprintk((KERN_DEBUG "usbaudio: set_format_out: USB format 0x%x, DMA format 0x%x srate %u\n", u->format, d->format, d->srate));
-	return 0;
-}
-
-static int set_format(struct usb_audiodev *s, unsigned int fmode, unsigned int fmt, unsigned int srate)
-{
-	int ret1 = 0, ret2 = 0;
-
-	if (!(fmode & (FMODE_READ|FMODE_WRITE)))
-		return -EINVAL;
-	if (fmode & FMODE_READ) {
-		usbin_stop(s);
-		s->usbin.dma.ready = 0;
-		if (fmt == AFMT_QUERY)
-			fmt = s->usbin.dma.format;
-		else
-			s->usbin.dma.format = fmt;
-		if (!srate)
-			srate = s->usbin.dma.srate;
-		else
-			s->usbin.dma.srate = srate;
-	}
-	if (fmode & FMODE_WRITE) {
-		usbout_stop(s);
-		s->usbout.dma.ready = 0;
-		if (fmt == AFMT_QUERY)
-			fmt = s->usbout.dma.format;
-		else
-			s->usbout.dma.format = fmt;
-		if (!srate)
-			srate = s->usbout.dma.srate;
-		else
-			s->usbout.dma.srate = srate;
-	}
-	if (fmode & FMODE_READ)
-		ret1 = set_format_in(s);
-	if (fmode & FMODE_WRITE)
-		ret2 = set_format_out(s);
-	return ret1 ? ret1 : ret2;
-}
-
-/* --------------------------------------------------------------------- */
-
-static int wrmixer(struct usb_mixerdev *ms, unsigned mixch, unsigned value)
-{
-	struct usb_device *dev = ms->state->usbdev;
-	unsigned char data[2];
-	struct mixerchannel *ch;
-	int v1, v2, v3;
-
-	if (mixch >= ms->numch)
-		return -1;
-	ch = &ms->ch[mixch];
-	v3 = ch->maxval - ch->minval;
-	v1 = value & 0xff;
-	v2 = (value >> 8) & 0xff;
-	if (v1 > 100)
-		v1 = 100;
-	if (v2 > 100)
-		v2 = 100;
-	if (!(ch->flags & (MIXFLG_STEREOIN | MIXFLG_STEREOOUT)))
-		v2 = v1;
-	ch->value = v1 | (v2 << 8);
-	v1 = (v1 * v3) / 100 + ch->minval;
-	v2 = (v2 * v3) / 100 + ch->minval;
-	switch (ch->selector) {
-	case 0:  /* mixer unit request */
-		data[0] = v1;
-		data[1] = v1 >> 8;
-		if (usb_control_msg(dev, usb_sndctrlpipe(dev, 0), SET_CUR, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_OUT,
-				    (ch->chnum << 8) | 1, ms->iface | (ch->unitid << 8), data, 2, 1000) < 0)
-			goto err;
-		if (!(ch->flags & (MIXFLG_STEREOIN | MIXFLG_STEREOOUT)))
-			return 0;
-		data[0] = v2;
-		data[1] = v2 >> 8;
-		if (usb_control_msg(dev, usb_sndctrlpipe(dev, 0), SET_CUR, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_OUT,
-				    ((ch->chnum + !!(ch->flags & MIXFLG_STEREOIN)) << 8) | (1 + !!(ch->flags & MIXFLG_STEREOOUT)),
-				    ms->iface | (ch->unitid << 8), data, 2, 1000) < 0)
-			goto err;
-		return 0;
-
-		/* various feature unit controls */
-	case VOLUME_CONTROL:
-		data[0] = v1;
-		data[1] = v1 >> 8;
-		if (usb_control_msg(dev, usb_sndctrlpipe(dev, 0), SET_CUR, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_OUT,
-				    (ch->selector << 8) | ch->chnum, ms->iface | (ch->unitid << 8), data, 2, 1000) < 0)
-			goto err;
-		if (!(ch->flags & (MIXFLG_STEREOIN | MIXFLG_STEREOOUT)))
-			return 0;
-		data[0] = v2;
-		data[1] = v2 >> 8;
-		if (usb_control_msg(dev, usb_sndctrlpipe(dev, 0), SET_CUR, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_OUT,
-				    (ch->selector << 8) | (ch->chnum + 1), ms->iface | (ch->unitid << 8), data, 2, 1000) < 0)
-			goto err;
-		return 0;
-                
-	case BASS_CONTROL:
-	case MID_CONTROL:
-	case TREBLE_CONTROL:
-		data[0] = v1 >> 8;
-		if (usb_control_msg(dev, usb_sndctrlpipe(dev, 0), SET_CUR, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_OUT,
-				    (ch->selector << 8) | ch->chnum, ms->iface | (ch->unitid << 8), data, 1, 1000) < 0)
-			goto err;
-		if (!(ch->flags & (MIXFLG_STEREOIN | MIXFLG_STEREOOUT)))
-			return 0;
-		data[0] = v2 >> 8;
-		if (usb_control_msg(dev, usb_sndctrlpipe(dev, 0), SET_CUR, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_OUT,
-				    (ch->selector << 8) | (ch->chnum + 1), ms->iface | (ch->unitid << 8), data, 1, 1000) < 0)
-			goto err;
-		return 0;
-
-	default:
-		return -1;
-	}
-	return 0;
-
- err:
-	printk(KERN_ERR "usbaudio: mixer request device %u if %u unit %u ch %u selector %u failed\n", 
-		dev->devnum, ms->iface, ch->unitid, ch->chnum, ch->selector);
-	return -1;
-}
-
-static int get_rec_src(struct usb_mixerdev *ms)
-{
-	struct usb_device *dev = ms->state->usbdev;
-	unsigned int mask = 0, retmask = 0;
-	unsigned int i, j;
-	unsigned char buf;
-	int err = 0;
-
-	for (i = 0; i < ms->numch; i++) {
-		if (!ms->ch[i].slctunitid || (mask & (1 << i)))
-			continue;
-		if (usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), GET_CUR, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN,
-				    0, ms->iface | (ms->ch[i].slctunitid << 8), &buf, 1, 1000) < 0) {
-			err = -EIO;
-			printk(KERN_ERR "usbaudio: selector read request device %u if %u unit %u failed\n", 
-			       dev->devnum, ms->iface, ms->ch[i].slctunitid & 0xff);
-			continue;
-		}
-		for (j = i; j < ms->numch; j++) {
-			if ((ms->ch[i].slctunitid ^ ms->ch[j].slctunitid) & 0xff)
-				continue;
-			mask |= 1 << j;
-			if (buf == (ms->ch[j].slctunitid >> 8))
-				retmask |= 1 << ms->ch[j].osschannel;
-		}
-	}
-	if (err)
-		return -EIO;
-	return retmask;
-}
-
-static int set_rec_src(struct usb_mixerdev *ms, int srcmask)
-{
-	struct usb_device *dev = ms->state->usbdev;
-	unsigned int mask = 0, smask, bmask;
-	unsigned int i, j;
-	unsigned char buf;
-	int err = 0;
-
-	for (i = 0; i < ms->numch; i++) {
-		if (!ms->ch[i].slctunitid || (mask & (1 << i)))
-			continue;
-		if (usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), GET_CUR, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN,
-				    0, ms->iface | (ms->ch[i].slctunitid << 8), &buf, 1, 1000) < 0) {
-			err = -EIO;
-			printk(KERN_ERR "usbaudio: selector read request device %u if %u unit %u failed\n", 
-			       dev->devnum, ms->iface, ms->ch[i].slctunitid & 0xff);
-			continue;
-		}
-		/* first generate smask */
-		smask = bmask = 0;
-		for (j = i; j < ms->numch; j++) {
-			if ((ms->ch[i].slctunitid ^ ms->ch[j].slctunitid) & 0xff)
-				continue;
-			smask |= 1 << ms->ch[j].osschannel;
-			if (buf == (ms->ch[j].slctunitid >> 8))
-				bmask |= 1 << ms->ch[j].osschannel;
-			mask |= 1 << j;
-		}
-		/* check for multiple set sources */
-		j = hweight32(srcmask & smask);
-		if (j == 0)
-			continue;
-		if (j > 1)
-			srcmask &= ~bmask;
-		for (j = i; j < ms->numch; j++) {
-			if ((ms->ch[i].slctunitid ^ ms->ch[j].slctunitid) & 0xff)
-				continue;
-			if (!(srcmask & (1 << ms->ch[j].osschannel)))
-				continue;
-			buf = ms->ch[j].slctunitid >> 8;
-			if (usb_control_msg(dev, usb_sndctrlpipe(dev, 0), SET_CUR, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_OUT,
-				    0, ms->iface | (ms->ch[j].slctunitid << 8), &buf, 1, 1000) < 0) {
-				err = -EIO;
-				printk(KERN_ERR "usbaudio: selector write request device %u if %u unit %u failed\n", 
-				       dev->devnum, ms->iface, ms->ch[j].slctunitid & 0xff);
-				continue;
-			}
-		}
-	}
-	return err ? -EIO : 0;
-}
-
-/* --------------------------------------------------------------------- */
-
-/*
- * should be called with open_sem hold, so that no new processes
- * look at the audio device to be destroyed
- */
-
-static void release(struct usb_audio_state *s)
-{
-	struct usb_audiodev *as;
-	struct usb_mixerdev *ms;
-
-	s->count--;
-	if (s->count) {
-		up(&open_sem);
-		return;
-	}
-	up(&open_sem);
-	wake_up(&open_wait);
-	while (!list_empty(&s->audiolist)) {
-		as = list_entry(s->audiolist.next, struct usb_audiodev, list);
-		list_del(&as->list);
-		usbin_release(as);
-		usbout_release(as);
-		dmabuf_release(&as->usbin.dma);
-		dmabuf_release(&as->usbout.dma);
-		usb_free_urb(as->usbin.durb[0].urb);
-		usb_free_urb(as->usbin.durb[1].urb);
-		usb_free_urb(as->usbin.surb[0].urb);
-		usb_free_urb(as->usbin.surb[1].urb);
-		usb_free_urb(as->usbout.durb[0].urb);
-		usb_free_urb(as->usbout.durb[1].urb);
-		usb_free_urb(as->usbout.surb[0].urb);
-		usb_free_urb(as->usbout.surb[1].urb);
-		kfree(as);
-	}
-	while (!list_empty(&s->mixerlist)) {
-		ms = list_entry(s->mixerlist.next, struct usb_mixerdev, list);
-		list_del(&ms->list);
-		kfree(ms);
-	}
-	kfree(s);
-}
-
-static inline int prog_dmabuf_in(struct usb_audiodev *as)
-{
-	usbin_stop(as);
-	return dmabuf_init(&as->usbin.dma);
-}
-
-static inline int prog_dmabuf_out(struct usb_audiodev *as)
-{
-	usbout_stop(as);
-	return dmabuf_init(&as->usbout.dma);
-}
-
-/* --------------------------------------------------------------------- */
-
-static int usb_audio_open_mixdev(struct inode *inode, struct file *file)
-{
-	unsigned int minor = iminor(inode);
-	struct usb_mixerdev *ms;
-	struct usb_audio_state *s;
-
-	down(&open_sem);
-	list_for_each_entry(s, &audiodevs, audiodev) {
-		list_for_each_entry(ms, &s->mixerlist, list) {
-			if (ms->dev_mixer == minor)
-				goto mixer_found;
-		}
-	}
-	up(&open_sem);
-	return -ENODEV;
-
- mixer_found:
-	if (!s->usbdev) {
-		up(&open_sem);
-		return -EIO;
-	}
-	file->private_data = ms;
-	s->count++;
-
-	up(&open_sem);
-	return nonseekable_open(inode, file);
-}
-
-static int usb_audio_release_mixdev(struct inode *inode, struct file *file)
-{
-	struct usb_mixerdev *ms = (struct usb_mixerdev *)file->private_data;
-	struct usb_audio_state *s;
-
-	lock_kernel();
-	s = ms->state;
-	down(&open_sem);
-	release(s);
-	unlock_kernel();
-	return 0;
-}
-
-static int usb_audio_ioctl_mixdev(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
-{
-	struct usb_mixerdev *ms = (struct usb_mixerdev *)file->private_data;
-	int i, j, val;
-	int __user *user_arg = (int __user *)arg;
-
-	if (!ms->state->usbdev)
-		return -ENODEV;
-  
-	if (cmd == SOUND_MIXER_INFO) {
-		mixer_info info;
-
-		memset(&info, 0, sizeof(info));
-		strncpy(info.id, "USB_AUDIO", sizeof(info.id));
-		strncpy(info.name, "USB Audio Class Driver", sizeof(info.name));
-		info.modify_counter = ms->modcnt;
-		if (copy_to_user((void __user *)arg, &info, sizeof(info)))
-			return -EFAULT;
-		return 0;
-	}
-	if (cmd == SOUND_OLD_MIXER_INFO) {
-		_old_mixer_info info;
-
-		memset(&info, 0, sizeof(info));
-		strncpy(info.id, "USB_AUDIO", sizeof(info.id));
-		strncpy(info.name, "USB Audio Class Driver", sizeof(info.name));
-		if (copy_to_user((void __user *)arg, &info, sizeof(info)))
-			return -EFAULT;
-		return 0;
-	}
-	if (cmd == OSS_GETVERSION)
-		return put_user(SOUND_VERSION, user_arg);
-	if (_IOC_TYPE(cmd) != 'M' || _IOC_SIZE(cmd) != sizeof(int))
-		return -EINVAL;
-	if (_IOC_DIR(cmd) == _IOC_READ) {
-		switch (_IOC_NR(cmd)) {
-		case SOUND_MIXER_RECSRC: /* Arg contains a bit for each recording source */
-			val = get_rec_src(ms);
-			if (val < 0)
-				return val;
-			return put_user(val, user_arg);
-
-		case SOUND_MIXER_DEVMASK: /* Arg contains a bit for each supported device */
-			for (val = i = 0; i < ms->numch; i++)
-				val |= 1 << ms->ch[i].osschannel;
-			return put_user(val, user_arg);
-
-		case SOUND_MIXER_RECMASK: /* Arg contains a bit for each supported recording source */
-			for (val = i = 0; i < ms->numch; i++)
-				if (ms->ch[i].slctunitid)
-					val |= 1 << ms->ch[i].osschannel;
-			return put_user(val, user_arg);
-
-		case SOUND_MIXER_STEREODEVS: /* Mixer channels supporting stereo */
-			for (val = i = 0; i < ms->numch; i++)
-				if (ms->ch[i].flags & (MIXFLG_STEREOIN | MIXFLG_STEREOOUT))
-					val |= 1 << ms->ch[i].osschannel;
-			return put_user(val, user_arg);
-			
-		case SOUND_MIXER_CAPS:
-			return put_user(SOUND_CAP_EXCL_INPUT, user_arg);
-
-		default:
-			i = _IOC_NR(cmd);
-			if (i >= SOUND_MIXER_NRDEVICES)
-				return -EINVAL;
-			for (j = 0; j < ms->numch; j++) {
-				if (ms->ch[j].osschannel == i) {
-					return put_user(ms->ch[j].value, user_arg);
-				}
-			}
-			return -EINVAL;
-		}
-	}
-	if (_IOC_DIR(cmd) != (_IOC_READ|_IOC_WRITE)) 
-		return -EINVAL;
-	ms->modcnt++;
-	switch (_IOC_NR(cmd)) {
-	case SOUND_MIXER_RECSRC: /* Arg contains a bit for each recording source */
-		if (get_user(val, user_arg))
-			return -EFAULT;
-		return set_rec_src(ms, val);
-
-	default:
-		i = _IOC_NR(cmd);
-		if (i >= SOUND_MIXER_NRDEVICES)
-			return -EINVAL;
-		for (j = 0; j < ms->numch && ms->ch[j].osschannel != i; j++);
-		if (j >= ms->numch)
-			return -EINVAL;
-		if (get_user(val, user_arg))
-			return -EFAULT;
-		if (wrmixer(ms, j, val))
-			return -EIO;
-		return put_user(ms->ch[j].value, user_arg);
-	}
-}
-
-static /*const*/ struct file_operations usb_mixer_fops = {
-	.owner =	THIS_MODULE,
-	.llseek =	no_llseek,
-	.ioctl =	usb_audio_ioctl_mixdev,
-	.open =		usb_audio_open_mixdev,
-	.release =	usb_audio_release_mixdev,
-};
-
-/* --------------------------------------------------------------------- */
-
-static int drain_out(struct usb_audiodev *as, int nonblock)
-{
-	DECLARE_WAITQUEUE(wait, current);
-	unsigned long flags;
-	int count, tmo;
-	
-	if (as->usbout.dma.mapped || !as->usbout.dma.ready)
-		return 0;
-	usbout_start(as);
-	add_wait_queue(&as->usbout.dma.wait, &wait);
-	for (;;) {
-		__set_current_state(TASK_INTERRUPTIBLE);
-		spin_lock_irqsave(&as->lock, flags);
-		count = as->usbout.dma.count;
-		spin_unlock_irqrestore(&as->lock, flags);
-		if (count <= 0)
-			break;
-		if (signal_pending(current))
-			break;
-		if (nonblock) {
-			remove_wait_queue(&as->usbout.dma.wait, &wait);
-			set_current_state(TASK_RUNNING);
-			return -EBUSY;
-		}
-		tmo = 3 * HZ * count / as->usbout.dma.srate;
-		tmo >>= AFMT_BYTESSHIFT(as->usbout.dma.format);
-		if (!schedule_timeout(tmo + 1)) {
-			printk(KERN_DEBUG "usbaudio: dma timed out??\n");
-			break;
-		}
-	}
-	remove_wait_queue(&as->usbout.dma.wait, &wait);
-	set_current_state(TASK_RUNNING);
-	if (signal_pending(current))
-		return -ERESTARTSYS;
-	return 0;
-}
-
-/* --------------------------------------------------------------------- */
-
-static ssize_t usb_audio_read(struct file *file, char __user *buffer, size_t count, loff_t *ppos)
-{
-	struct usb_audiodev *as = (struct usb_audiodev *)file->private_data;
-	DECLARE_WAITQUEUE(wait, current);
-	ssize_t ret = 0;
-	unsigned long flags;
-	unsigned int ptr;
-	int cnt, err;
-
-	if (as->usbin.dma.mapped)
-		return -ENXIO;
-	if (!as->usbin.dma.ready && (ret = prog_dmabuf_in(as)))
-		return ret;
-	if (!access_ok(VERIFY_WRITE, buffer, count))
-		return -EFAULT;
-	add_wait_queue(&as->usbin.dma.wait, &wait);
-	while (count > 0) {
-		spin_lock_irqsave(&as->lock, flags);
-		ptr = as->usbin.dma.rdptr;
-		cnt = as->usbin.dma.count;
-		/* set task state early to avoid wakeup races */
-		if (cnt <= 0)
-			__set_current_state(TASK_INTERRUPTIBLE);
-		spin_unlock_irqrestore(&as->lock, flags);
-		if (cnt > count)
-			cnt = count;
-		if (cnt <= 0) {
-			if (usbin_start(as)) {
-				if (!ret)
-					ret = -ENODEV;
-				break;
-			}
-			if (file->f_flags & O_NONBLOCK) {
-				if (!ret)
-					ret = -EAGAIN;
-				break;
-			}
-			schedule();
-			if (signal_pending(current)) {
-				if (!ret)
-					ret = -ERESTARTSYS;
-				break;
-			}
-			continue;
-		}
-		if ((err = dmabuf_copyout_user(&as->usbin.dma, ptr, buffer, cnt))) {
-			if (!ret)
-				ret = err;
-			break;
-		}
-		ptr += cnt;
-		if (ptr >= as->usbin.dma.dmasize)
-			ptr -= as->usbin.dma.dmasize;
-		spin_lock_irqsave(&as->lock, flags);
-		as->usbin.dma.rdptr = ptr;
-		as->usbin.dma.count -= cnt;
-		spin_unlock_irqrestore(&as->lock, flags);
-		count -= cnt;
-		buffer += cnt;
-		ret += cnt;
-	}
-	__set_current_state(TASK_RUNNING);
-	remove_wait_queue(&as->usbin.dma.wait, &wait);
-	return ret;
-}
-
-static ssize_t usb_audio_write(struct file *file, const char __user *buffer, size_t count, loff_t *ppos)
-{
-	struct usb_audiodev *as = (struct usb_audiodev *)file->private_data;
-	DECLARE_WAITQUEUE(wait, current);
-	ssize_t ret = 0;
-	unsigned long flags;
-	unsigned int ptr;
-	unsigned int start_thr;
-	int cnt, err;
-
-	if (as->usbout.dma.mapped)
-		return -ENXIO;
-	if (!as->usbout.dma.ready && (ret = prog_dmabuf_out(as)))
-		return ret;
-	if (!access_ok(VERIFY_READ, buffer, count))
-		return -EFAULT;
-	start_thr = (as->usbout.dma.srate << AFMT_BYTESSHIFT(as->usbout.dma.format)) / (1000 / (3 * DESCFRAMES));
-	add_wait_queue(&as->usbout.dma.wait, &wait);
-	while (count > 0) {
-#if 0
-		printk(KERN_DEBUG "usb_audio_write: count %u dma: count %u rdptr %u wrptr %u dmasize %u fragsize %u flags 0x%02x taskst 0x%lx\n",
-		       count, as->usbout.dma.count, as->usbout.dma.rdptr, as->usbout.dma.wrptr, as->usbout.dma.dmasize, as->usbout.dma.fragsize,
-		       as->usbout.flags, current->state);
-#endif
-		spin_lock_irqsave(&as->lock, flags);
-		if (as->usbout.dma.count < 0) {
-			as->usbout.dma.count = 0;
-			as->usbout.dma.rdptr = as->usbout.dma.wrptr;
-		}
-		ptr = as->usbout.dma.wrptr;
-		cnt = as->usbout.dma.dmasize - as->usbout.dma.count;
-		/* set task state early to avoid wakeup races */
-		if (cnt <= 0)
-			__set_current_state(TASK_INTERRUPTIBLE);
-		spin_unlock_irqrestore(&as->lock, flags);
-		if (cnt > count)
-			cnt = count;
-		if (cnt <= 0) {
-			if (usbout_start(as)) {
-				if (!ret)
-					ret = -ENODEV;
-				break;
-			}
-			if (file->f_flags & O_NONBLOCK) {
-				if (!ret)
-					ret = -EAGAIN;
-				break;
-			}
-			schedule();
-			if (signal_pending(current)) {
-				if (!ret)
-					ret = -ERESTARTSYS;
-				break;
-			}
-			continue;
-		}
-		if ((err = dmabuf_copyin_user(&as->usbout.dma, ptr, buffer, cnt))) {
-			if (!ret)
-				ret = err;
-			break;
-		}
-		ptr += cnt;
-		if (ptr >= as->usbout.dma.dmasize)
-			ptr -= as->usbout.dma.dmasize;
-		spin_lock_irqsave(&as->lock, flags);
-		as->usbout.dma.wrptr = ptr;
-		as->usbout.dma.count += cnt;
-		spin_unlock_irqrestore(&as->lock, flags);
-		count -= cnt;
-		buffer += cnt;
-		ret += cnt;
-		if (as->usbout.dma.count >= start_thr && usbout_start(as)) {
-			if (!ret)
-				ret = -ENODEV;
-			break;
-		}
-	}
-	__set_current_state(TASK_RUNNING);
-	remove_wait_queue(&as->usbout.dma.wait, &wait);
-	return ret;
-}
-
-/* Called without the kernel lock - fine */
-static unsigned int usb_audio_poll(struct file *file, struct poll_table_struct *wait)
-{
-	struct usb_audiodev *as = (struct usb_audiodev *)file->private_data;
-	unsigned long flags;
-	unsigned int mask = 0;
-
-	if (file->f_mode & FMODE_WRITE) {
-		if (!as->usbout.dma.ready)
-			prog_dmabuf_out(as);
-		poll_wait(file, &as->usbout.dma.wait, wait);
-	}
-	if (file->f_mode & FMODE_READ) {
-		if (!as->usbin.dma.ready)
-			prog_dmabuf_in(as);
-		poll_wait(file, &as->usbin.dma.wait, wait);
-	}
-	spin_lock_irqsave(&as->lock, flags);
-	if (file->f_mode & FMODE_READ) {
-		if (as->usbin.dma.count >= (signed)as->usbin.dma.fragsize)
-			mask |= POLLIN | POLLRDNORM;
-	}
-	if (file->f_mode & FMODE_WRITE) {
-		if (as->usbout.dma.mapped) {
-			if (as->usbout.dma.count >= (signed)as->usbout.dma.fragsize) 
-				mask |= POLLOUT | POLLWRNORM;
-		} else {
-			if ((signed)as->usbout.dma.dmasize >= as->usbout.dma.count + (signed)as->usbout.dma.fragsize)
-				mask |= POLLOUT | POLLWRNORM;
-		}
-	}
-	spin_unlock_irqrestore(&as->lock, flags);
-	return mask;
-}
-
-static int usb_audio_mmap(struct file *file, struct vm_area_struct *vma)
-{
-	struct usb_audiodev *as = (struct usb_audiodev *)file->private_data;
-	struct dmabuf *db;
-	int ret = -EINVAL;
-
-	lock_kernel();
-	if (vma->vm_flags & VM_WRITE) {
-		if ((ret = prog_dmabuf_out(as)) != 0)
-			goto out;
-		db = &as->usbout.dma;
-	} else if (vma->vm_flags & VM_READ) {
-		if ((ret = prog_dmabuf_in(as)) != 0)
-			goto out;
-		db = &as->usbin.dma;
-	} else
-		goto out;
-
-	ret = -EINVAL;
-	if (vma->vm_pgoff != 0)
-		goto out;
-
-	ret = dmabuf_mmap(vma, db,  vma->vm_start, vma->vm_end - vma->vm_start, vma->vm_page_prot);
-out:
-	unlock_kernel();
-	return ret;
-}
-
-static int usb_audio_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
-{
-	struct usb_audiodev *as = (struct usb_audiodev *)file->private_data;
-	struct usb_audio_state *s = as->state;
-	int __user *user_arg = (int __user *)arg;
-	unsigned long flags;
-	audio_buf_info abinfo;
-	count_info cinfo;
-	int val = 0;
-	int val2, mapped, ret;
-
-	if (!s->usbdev)
-		return -EIO;
-	mapped = ((file->f_mode & FMODE_WRITE) && as->usbout.dma.mapped) ||
-		((file->f_mode & FMODE_READ) && as->usbin.dma.mapped);
-#if 0
-	if (arg)
-		get_user(val, (int *)arg);
-	printk(KERN_DEBUG "usbaudio: usb_audio_ioctl cmd=%x arg=%lx *arg=%d\n", cmd, arg, val)
-#endif
-	switch (cmd) {
-	case OSS_GETVERSION:
-		return put_user(SOUND_VERSION, user_arg);
-
-	case SNDCTL_DSP_SYNC:
-		if (file->f_mode & FMODE_WRITE)
-			return drain_out(as, 0/*file->f_flags & O_NONBLOCK*/);
-		return 0;
-
-	case SNDCTL_DSP_SETDUPLEX:
-		return 0;
-
-	case SNDCTL_DSP_GETCAPS:
-		return put_user(DSP_CAP_DUPLEX | DSP_CAP_REALTIME | DSP_CAP_TRIGGER | 
-				DSP_CAP_MMAP | DSP_CAP_BATCH, user_arg);
-
-	case SNDCTL_DSP_RESET:
-		if (file->f_mode & FMODE_WRITE) {
-			usbout_stop(as);
-			as->usbout.dma.rdptr = as->usbout.dma.wrptr = as->usbout.dma.count = as->usbout.dma.total_bytes = 0;
-		}
-		if (file->f_mode & FMODE_READ) {
-			usbin_stop(as);
-			as->usbin.dma.rdptr = as->usbin.dma.wrptr = as->usbin.dma.count = as->usbin.dma.total_bytes = 0;
-		}
-		return 0;
-
-	case SNDCTL_DSP_SPEED:
-		if (get_user(val, user_arg))
-			return -EFAULT;
-		if (val >= 0) {
-			if (val < 4000)
-				val = 4000;
-			if (val > 100000)
-				val = 100000;
-			if (set_format(as, file->f_mode, AFMT_QUERY, val))
-				return -EIO;
-		}
-		return put_user((file->f_mode & FMODE_READ) ? 
-				as->usbin.dma.srate : as->usbout.dma.srate,
-				user_arg);
-
-	case SNDCTL_DSP_STEREO:
-		if (get_user(val, user_arg))
-			return -EFAULT;
-		val2 = (file->f_mode & FMODE_READ) ? as->usbin.dma.format : as->usbout.dma.format;
-		if (val)
-			val2 |= AFMT_STEREO;
-		else
-			val2 &= ~AFMT_STEREO;
-		if (set_format(as, file->f_mode, val2, 0))
-			return -EIO;
-		return 0;
-
-	case SNDCTL_DSP_CHANNELS:
-		if (get_user(val, user_arg))
-			return -EFAULT;
-		if (val != 0) {
-			val2 = (file->f_mode & FMODE_READ) ? as->usbin.dma.format : as->usbout.dma.format;
-			if (val == 1)
-				val2 &= ~AFMT_STEREO;
-			else
-				val2 |= AFMT_STEREO;
-			if (set_format(as, file->f_mode, val2, 0))
-				return -EIO;
-		}
-		val2 = (file->f_mode & FMODE_READ) ? as->usbin.dma.format : as->usbout.dma.format;
-		return put_user(AFMT_ISSTEREO(val2) ? 2 : 1, user_arg);
-
-	case SNDCTL_DSP_GETFMTS: /* Returns a mask */
-		return put_user(AFMT_U8 | AFMT_U16_LE | AFMT_U16_BE |
-				AFMT_S8 | AFMT_S16_LE | AFMT_S16_BE, user_arg);
-
-	case SNDCTL_DSP_SETFMT: /* Selects ONE fmt*/
-		if (get_user(val, user_arg))
-			return -EFAULT;
-		if (val != AFMT_QUERY) {
-			if (hweight32(val) != 1)
-				return -EINVAL;
-			if (!(val & (AFMT_U8 | AFMT_U16_LE | AFMT_U16_BE |
-				     AFMT_S8 | AFMT_S16_LE | AFMT_S16_BE)))
-				return -EINVAL;
-			val2 = (file->f_mode & FMODE_READ) ? as->usbin.dma.format : as->usbout.dma.format;
-			val |= val2 & AFMT_STEREO;
-			if (set_format(as, file->f_mode, val, 0))
-				return -EIO;
-		}
-		val2 = (file->f_mode & FMODE_READ) ? as->usbin.dma.format : as->usbout.dma.format;
-		return put_user(val2 & ~AFMT_STEREO, user_arg);
-
-	case SNDCTL_DSP_POST:
-		return 0;
-
-	case SNDCTL_DSP_GETTRIGGER:
-		val = 0;
-		if (file->f_mode & FMODE_READ && as->usbin.flags & FLG_RUNNING) 
-			val |= PCM_ENABLE_INPUT;
-		if (file->f_mode & FMODE_WRITE && as->usbout.flags & FLG_RUNNING) 
-			val |= PCM_ENABLE_OUTPUT;
-		return put_user(val, user_arg);
-
-	case SNDCTL_DSP_SETTRIGGER:
-		if (get_user(val, user_arg))
-			return -EFAULT;
-		if (file->f_mode & FMODE_READ) {
-			if (val & PCM_ENABLE_INPUT) {
-				if (!as->usbin.dma.ready && (ret = prog_dmabuf_in(as)))
-					return ret;
-				if (usbin_start(as))
-					return -ENODEV;
-			} else
-				usbin_stop(as);
-		}
-		if (file->f_mode & FMODE_WRITE) {
-			if (val & PCM_ENABLE_OUTPUT) {
-				if (!as->usbout.dma.ready && (ret = prog_dmabuf_out(as)))
-					return ret;
-				if (usbout_start(as))
-					return -ENODEV;
-			} else
-				usbout_stop(as);
-		}
-		return 0;
-
-	case SNDCTL_DSP_GETOSPACE:
-		if (!(file->f_mode & FMODE_WRITE))
-			return -EINVAL;
-		if (!(as->usbout.flags & FLG_RUNNING) && (val = prog_dmabuf_out(as)) != 0)
-			return val;
-		spin_lock_irqsave(&as->lock, flags);
-		abinfo.fragsize = as->usbout.dma.fragsize;
-		abinfo.bytes = as->usbout.dma.dmasize - as->usbout.dma.count;
-		abinfo.fragstotal = as->usbout.dma.numfrag;
-		abinfo.fragments = abinfo.bytes >> as->usbout.dma.fragshift;      
-		spin_unlock_irqrestore(&as->lock, flags);
-		return copy_to_user((void __user *)arg, &abinfo, sizeof(abinfo)) ? -EFAULT : 0;
-
-	case SNDCTL_DSP_GETISPACE:
-		if (!(file->f_mode & FMODE_READ))
-			return -EINVAL;
-		if (!(as->usbin.flags & FLG_RUNNING) && (val = prog_dmabuf_in(as)) != 0)
-			return val;
-		spin_lock_irqsave(&as->lock, flags);
-		abinfo.fragsize = as->usbin.dma.fragsize;
-		abinfo.bytes = as->usbin.dma.count;
-		abinfo.fragstotal = as->usbin.dma.numfrag;
-		abinfo.fragments = abinfo.bytes >> as->usbin.dma.fragshift;      
-		spin_unlock_irqrestore(&as->lock, flags);
-		return copy_to_user((void __user *)arg, &abinfo, sizeof(abinfo)) ? -EFAULT : 0;
-		
-	case SNDCTL_DSP_NONBLOCK:
-		file->f_flags |= O_NONBLOCK;
-		return 0;
-
-	case SNDCTL_DSP_GETODELAY:
-		if (!(file->f_mode & FMODE_WRITE))
-			return -EINVAL;
-		spin_lock_irqsave(&as->lock, flags);
-		val = as->usbout.dma.count;
-		spin_unlock_irqrestore(&as->lock, flags);
-		return put_user(val, user_arg);
-
-	case SNDCTL_DSP_GETIPTR:
-		if (!(file->f_mode & FMODE_READ))
-			return -EINVAL;
-		spin_lock_irqsave(&as->lock, flags);
-		cinfo.bytes = as->usbin.dma.total_bytes;
-		cinfo.blocks = as->usbin.dma.count >> as->usbin.dma.fragshift;
-		cinfo.ptr = as->usbin.dma.wrptr;
-		if (as->usbin.dma.mapped)
-			as->usbin.dma.count &= as->usbin.dma.fragsize-1;
-		spin_unlock_irqrestore(&as->lock, flags);
-		if (copy_to_user((void __user *)arg, &cinfo, sizeof(cinfo)))
-			return -EFAULT;
-		return 0;
-
-	case SNDCTL_DSP_GETOPTR:
-		if (!(file->f_mode & FMODE_WRITE))
-			return -EINVAL;
-		spin_lock_irqsave(&as->lock, flags);
-		cinfo.bytes = as->usbout.dma.total_bytes;
-		cinfo.blocks = as->usbout.dma.count >> as->usbout.dma.fragshift;
-		cinfo.ptr = as->usbout.dma.rdptr;
-		if (as->usbout.dma.mapped)
-			as->usbout.dma.count &= as->usbout.dma.fragsize-1;
-		spin_unlock_irqrestore(&as->lock, flags);
-		if (copy_to_user((void __user *)arg, &cinfo, sizeof(cinfo)))
-			return -EFAULT;
-		return 0;
-
-       case SNDCTL_DSP_GETBLKSIZE:
-		if (file->f_mode & FMODE_WRITE) {
-			if ((val = prog_dmabuf_out(as)))
-				return val;
-			return put_user(as->usbout.dma.fragsize, user_arg);
-		}
-		if ((val = prog_dmabuf_in(as)))
-			return val;
-		return put_user(as->usbin.dma.fragsize, user_arg);
-
-	case SNDCTL_DSP_SETFRAGMENT:
-		if (get_user(val, user_arg))
-			return -EFAULT;
-		if (file->f_mode & FMODE_READ) {
-			as->usbin.dma.ossfragshift = val & 0xffff;
-			as->usbin.dma.ossmaxfrags = (val >> 16) & 0xffff;
-			if (as->usbin.dma.ossfragshift < 4)
-				as->usbin.dma.ossfragshift = 4;
-			if (as->usbin.dma.ossfragshift > 15)
-				as->usbin.dma.ossfragshift = 15;
-			if (as->usbin.dma.ossmaxfrags < 4)
-				as->usbin.dma.ossmaxfrags = 4;
-		}
-		if (file->f_mode & FMODE_WRITE) {
-			as->usbout.dma.ossfragshift = val & 0xffff;
-			as->usbout.dma.ossmaxfrags = (val >> 16) & 0xffff;
-			if (as->usbout.dma.ossfragshift < 4)
-				as->usbout.dma.ossfragshift = 4;
-			if (as->usbout.dma.ossfragshift > 15)
-				as->usbout.dma.ossfragshift = 15;
-			if (as->usbout.dma.ossmaxfrags < 4)
-				as->usbout.dma.ossmaxfrags = 4;
-		}
-		return 0;
-
-	case SNDCTL_DSP_SUBDIVIDE:
-		if ((file->f_mode & FMODE_READ && as->usbin.dma.subdivision) ||
-		    (file->f_mode & FMODE_WRITE && as->usbout.dma.subdivision))
-			return -EINVAL;
-		if (get_user(val, user_arg))
-			return -EFAULT;
-		if (val != 1 && val != 2 && val != 4)
-			return -EINVAL;
-		if (file->f_mode & FMODE_READ)
-			as->usbin.dma.subdivision = val;
-		if (file->f_mode & FMODE_WRITE)
-			as->usbout.dma.subdivision = val;
-		return 0;
-
-	case SOUND_PCM_READ_RATE:
-		return put_user((file->f_mode & FMODE_READ) ? 
-				as->usbin.dma.srate : as->usbout.dma.srate,
-				user_arg);
-
-	case SOUND_PCM_READ_CHANNELS:
-		val2 = (file->f_mode & FMODE_READ) ? as->usbin.dma.format : as->usbout.dma.format;
-		return put_user(AFMT_ISSTEREO(val2) ? 2 : 1, user_arg);
-
-	case SOUND_PCM_READ_BITS:
-		val2 = (file->f_mode & FMODE_READ) ? as->usbin.dma.format : as->usbout.dma.format;
-		return put_user(AFMT_IS16BIT(val2) ? 16 : 8, user_arg);
-
-	case SOUND_PCM_WRITE_FILTER:
-	case SNDCTL_DSP_SETSYNCRO:
-	case SOUND_PCM_READ_FILTER:
-		return -EINVAL;
-	}
-	dprintk((KERN_DEBUG "usbaudio: usb_audio_ioctl - no command found\n"));
-	return -ENOIOCTLCMD;
-}
-
-static int usb_audio_open(struct inode *inode, struct file *file)
-{
-	unsigned int minor = iminor(inode);
-	DECLARE_WAITQUEUE(wait, current);
-	struct usb_audiodev *as;
-	struct usb_audio_state *s;
-
-	for (;;) {
-		down(&open_sem);
-		list_for_each_entry(s, &audiodevs, audiodev) {
-			list_for_each_entry(as, &s->audiolist, list) {
-				if (!((as->dev_audio ^ minor) & ~0xf))
-					goto device_found;
-			}
-		}
-		up(&open_sem);
-		return -ENODEV;
-
-	device_found:
-		if (!s->usbdev) {
-			up(&open_sem);
-			return -EIO;
-		}
-		/* wait for device to become free */
-		if (!(as->open_mode & file->f_mode))
-			break;
-		if (file->f_flags & O_NONBLOCK) {
-			up(&open_sem);
-			return -EBUSY;
-		}
-		__set_current_state(TASK_INTERRUPTIBLE);
-		add_wait_queue(&open_wait, &wait);
-		up(&open_sem);
-		schedule();
-		__set_current_state(TASK_RUNNING);
-		remove_wait_queue(&open_wait, &wait);
-		if (signal_pending(current))
-			return -ERESTARTSYS;
-	}
-	if (file->f_mode & FMODE_READ)
-		as->usbin.dma.ossfragshift = as->usbin.dma.ossmaxfrags = as->usbin.dma.subdivision = 0;
-	if (file->f_mode & FMODE_WRITE)
-		as->usbout.dma.ossfragshift = as->usbout.dma.ossmaxfrags = as->usbout.dma.subdivision = 0;
-	if (set_format(as, file->f_mode, ((minor & 0xf) == SND_DEV_DSP16) ? AFMT_S16_LE : AFMT_U8 /* AFMT_ULAW */, 8000)) {
-		up(&open_sem);
-		return -EIO;
-	}
-	file->private_data = as;
-	as->open_mode |= file->f_mode & (FMODE_READ | FMODE_WRITE);
-	s->count++;
-	up(&open_sem);
-	return nonseekable_open(inode, file);
-}
-
-static int usb_audio_release(struct inode *inode, struct file *file)
-{
-	struct usb_audiodev *as = (struct usb_audiodev *)file->private_data;
-	struct usb_audio_state *s;
-	struct usb_device *dev;
-
-	lock_kernel();
-	s = as->state;
-	dev = s->usbdev;
-	if (file->f_mode & FMODE_WRITE)
-		drain_out(as, file->f_flags & O_NONBLOCK);
-	down(&open_sem);
-	if (file->f_mode & FMODE_WRITE) {
-		usbout_stop(as);
-		if (dev && as->usbout.interface >= 0)
-			usb_set_interface(dev, as->usbout.interface, 0);
-		dmabuf_release(&as->usbout.dma);
-		usbout_release(as);
-	}
-	if (file->f_mode & FMODE_READ) {
-		usbin_stop(as);
-		if (dev && as->usbin.interface >= 0)
-			usb_set_interface(dev, as->usbin.interface, 0);
-		dmabuf_release(&as->usbin.dma);
-		usbin_release(as);
-	}
-	as->open_mode &= (~file->f_mode) & (FMODE_READ|FMODE_WRITE);
-	release(s);
-	wake_up(&open_wait);
-	unlock_kernel();
-	return 0;
-}
-
-static /*const*/ struct file_operations usb_audio_fops = {
-	.owner =	THIS_MODULE,
-	.llseek =	no_llseek,
-	.read =		usb_audio_read,
-	.write =	usb_audio_write,
-	.poll =		usb_audio_poll,
-	.ioctl =	usb_audio_ioctl,
-	.mmap =		usb_audio_mmap,
-	.open =		usb_audio_open,
-	.release =	usb_audio_release,
-};
-
-/* --------------------------------------------------------------------- */
-
-static int usb_audio_probe(struct usb_interface *iface,
-			   const struct usb_device_id *id);
-static void usb_audio_disconnect(struct usb_interface *iface);
-
-static struct usb_device_id usb_audio_ids [] = {
-    { .match_flags = (USB_DEVICE_ID_MATCH_INT_CLASS | USB_DEVICE_ID_MATCH_INT_SUBCLASS),
-      .bInterfaceClass = USB_CLASS_AUDIO, .bInterfaceSubClass = 1},
-    { }						/* Terminating entry */
-};
-
-MODULE_DEVICE_TABLE (usb, usb_audio_ids);
-
-static struct usb_driver usb_audio_driver = {
-	.name =		"audio",
-	.probe =	usb_audio_probe,
-	.disconnect =	usb_audio_disconnect,
-	.id_table =	usb_audio_ids,
-};
-
-static void *find_descriptor(void *descstart, unsigned int desclen, void *after, 
-			     u8 dtype, int iface, int altsetting)
-{
-	u8 *p, *end, *next;
-	int ifc = -1, as = -1;
-
-	p = descstart;
-	end = p + desclen;
-	for (; p < end;) {
-		if (p[0] < 2)
-			return NULL;
-		next = p + p[0];
-		if (next > end)
-			return NULL;
-		if (p[1] == USB_DT_INTERFACE) {
-			/* minimum length of interface descriptor */
-			if (p[0] < 9)
-				return NULL;
-			ifc = p[2];
-			as = p[3];
-		}
-		if (p[1] == dtype && (!after || (void *)p > after) &&
-		    (iface == -1 || iface == ifc) && (altsetting == -1 || altsetting == as)) {
-			return p;
-		}
-		p = next;
-	}
-	return NULL;
-}
-
-static void *find_csinterface_descriptor(void *descstart, unsigned int desclen, void *after, u8 dsubtype, int iface, int altsetting)
-{
-	unsigned char *p;
-
-	p = find_descriptor(descstart, desclen, after, USB_DT_CS_INTERFACE, iface, altsetting);
-	while (p) {
-		if (p[0] >= 3 && p[2] == dsubtype)
-			return p;
-		p = find_descriptor(descstart, desclen, p, USB_DT_CS_INTERFACE, iface, altsetting);
-	}
-	return NULL;
-}
-
-static void *find_audiocontrol_unit(void *descstart, unsigned int desclen, void *after, u8 unit, int iface)
-{
-	unsigned char *p;
-
-	p = find_descriptor(descstart, desclen, after, USB_DT_CS_INTERFACE, iface, -1);
-	while (p) {
-		if (p[0] >= 4 && p[2] >= INPUT_TERMINAL && p[2] <= EXTENSION_UNIT && p[3] == unit)
-			return p;
-		p = find_descriptor(descstart, desclen, p, USB_DT_CS_INTERFACE, iface, -1);
-	}
-	return NULL;
-}
-
-static void usb_audio_parsestreaming(struct usb_audio_state *s, unsigned char *buffer, unsigned int buflen, int asifin, int asifout)
-{
-	struct usb_device *dev = s->usbdev;
-	struct usb_audiodev *as;
-	struct usb_host_interface *alts;
-	struct usb_interface *iface;
-	struct audioformat *fp;
-	unsigned char *fmt, *csep;
-	unsigned int i, j, k, format, idx;
-
-	if (!(as = kmalloc(sizeof(struct usb_audiodev), GFP_KERNEL)))
-		return;
-	memset(as, 0, sizeof(struct usb_audiodev));
-	init_waitqueue_head(&as->usbin.dma.wait);
-	init_waitqueue_head(&as->usbout.dma.wait);
-	spin_lock_init(&as->lock);
-	as->usbin.durb[0].urb = usb_alloc_urb (DESCFRAMES, GFP_KERNEL);
-	as->usbin.durb[1].urb = usb_alloc_urb (DESCFRAMES, GFP_KERNEL);
-	as->usbin.surb[0].urb = usb_alloc_urb (SYNCFRAMES, GFP_KERNEL);
-	as->usbin.surb[1].urb = usb_alloc_urb (SYNCFRAMES, GFP_KERNEL);
-	as->usbout.durb[0].urb = usb_alloc_urb (DESCFRAMES, GFP_KERNEL);
-	as->usbout.durb[1].urb = usb_alloc_urb (DESCFRAMES, GFP_KERNEL);
-	as->usbout.surb[0].urb = usb_alloc_urb (SYNCFRAMES, GFP_KERNEL);
-	as->usbout.surb[1].urb = usb_alloc_urb (SYNCFRAMES, GFP_KERNEL);
-	if ((!as->usbin.durb[0].urb) ||
-	    (!as->usbin.durb[1].urb) ||
-	    (!as->usbin.surb[0].urb) ||
-	    (!as->usbin.surb[1].urb) ||
-	    (!as->usbout.durb[0].urb) ||
-	    (!as->usbout.durb[1].urb) ||
-	    (!as->usbout.surb[0].urb) ||
-	    (!as->usbout.surb[1].urb)) {
-		usb_free_urb(as->usbin.durb[0].urb);
-		usb_free_urb(as->usbin.durb[1].urb);
-		usb_free_urb(as->usbin.surb[0].urb);
-		usb_free_urb(as->usbin.surb[1].urb);
-		usb_free_urb(as->usbout.durb[0].urb);
-		usb_free_urb(as->usbout.durb[1].urb);
-		usb_free_urb(as->usbout.surb[0].urb);
-		usb_free_urb(as->usbout.surb[1].urb);
-		kfree(as);
-		return;
-	}
-	as->state = s;
-	as->usbin.interface = asifin;
-	as->usbout.interface = asifout;
-	/* search for input formats */
-	if (asifin >= 0) {
-		as->usbin.flags = FLG_CONNECTED;
-		iface = usb_ifnum_to_if(dev, asifin);
-		for (idx = 0; idx < iface->num_altsetting; idx++) {
-			alts = &iface->altsetting[idx];
-			i = alts->desc.bAlternateSetting;
-			if (alts->desc.bInterfaceClass != USB_CLASS_AUDIO || alts->desc.bInterfaceSubClass != 2)
-				continue;
-			if (alts->desc.bNumEndpoints < 1) {
-				if (i != 0) {  /* altsetting 0 has no endpoints (Section B.3.4.1) */
-					printk(KERN_ERR "usbaudio: device %u interface %u altsetting %u does not have an endpoint\n", 
-					       dev->devnum, asifin, i);
-				}
-				continue;
-			}
-			if ((alts->endpoint[0].desc.bmAttributes & 0x03) != 0x01 ||
-			    !(alts->endpoint[0].desc.bEndpointAddress & 0x80)) {
-				printk(KERN_ERR "usbaudio: device %u interface %u altsetting %u first endpoint not isochronous in\n", 
-				       dev->devnum, asifin, i);
-				continue;
-			}
-			fmt = find_csinterface_descriptor(buffer, buflen, NULL, AS_GENERAL, asifin, i);
-			if (!fmt) {
-				printk(KERN_ERR "usbaudio: device %u interface %u altsetting %u FORMAT_TYPE descriptor not found\n", 
-				       dev->devnum, asifin, i);
-				continue;
-			}
-			if (fmt[0] < 7 || fmt[6] != 0 || (fmt[5] != 1 && fmt[5] != 2)) {
-				printk(KERN_ERR "usbaudio: device %u interface %u altsetting %u format not supported\n", 
-				       dev->devnum, asifin, i);
-				continue;
-			}
-			format = (fmt[5] == 2) ? (AFMT_U16_LE | AFMT_U8) : (AFMT_S16_LE | AFMT_S8);
-			fmt = find_csinterface_descriptor(buffer, buflen, NULL, FORMAT_TYPE, asifin, i);
-			if (!fmt) {
-				printk(KERN_ERR "usbaudio: device %u interface %u altsetting %u FORMAT_TYPE descriptor not found\n", 
-				       dev->devnum, asifin, i);
-				continue;
-			}
-			if (fmt[0] < 8+3*(fmt[7] ? fmt[7] : 2) || fmt[3] != 1) {
-				printk(KERN_ERR "usbaudio: device %u interface %u altsetting %u FORMAT_TYPE descriptor not supported\n", 
-				       dev->devnum, asifin, i);
-				continue;
-			}
-			if (fmt[4] < 1 || fmt[4] > 2 || fmt[5] < 1 || fmt[5] > 2) {
-				printk(KERN_ERR "usbaudio: device %u interface %u altsetting %u unsupported channels %u framesize %u\n", 
-				       dev->devnum, asifin, i, fmt[4], fmt[5]);
-				continue;
-			}
-			csep = find_descriptor(buffer, buflen, NULL, USB_DT_CS_ENDPOINT, asifin, i);
-			if (!csep || csep[0] < 7 || csep[2] != EP_GENERAL) {
-				printk(KERN_ERR "usbaudio: device %u interface %u altsetting %u no or invalid class specific endpoint descriptor\n", 
-				       dev->devnum, asifin, i);
-				continue;
-			}
-			if (as->numfmtin >= MAXFORMATS)
-				continue;
-			fp = &as->fmtin[as->numfmtin++];
-			if (fmt[5] == 2)
-				format &= (AFMT_U16_LE | AFMT_S16_LE);
-			else
-				format &= (AFMT_U8 | AFMT_S8);
-			if (fmt[4] == 2)
-				format |= AFMT_STEREO;
-			fp->format = format;
-			fp->altsetting = i;
-			fp->sratelo = fp->sratehi = fmt[8] | (fmt[9] << 8) | (fmt[10] << 16);
-			printk(KERN_INFO "usbaudio: valid input sample rate %u\n", fp->sratelo);
-			for (j = fmt[7] ? (fmt[7]-1) : 1; j > 0; j--) {
-				k = fmt[8+3*j] | (fmt[9+3*j] << 8) | (fmt[10+3*j] << 16);
-				printk(KERN_INFO "usbaudio: valid input sample rate %u\n", k);
-				if (k > fp->sratehi)
-					fp->sratehi = k;
-				if (k < fp->sratelo)
-					fp->sratelo = k;
-			}
-			fp->attributes = csep[3];
-			printk(KERN_INFO "usbaudio: device %u interface %u altsetting %u: format 0x%08x sratelo %u sratehi %u attributes 0x%02x\n", 
-			       dev->devnum, asifin, i, fp->format, fp->sratelo, fp->sratehi, fp->attributes);
-		}
-	}
-	/* search for output formats */
-	if (asifout >= 0) {
-		as->usbout.flags = FLG_CONNECTED;
-		iface = usb_ifnum_to_if(dev, asifout);
-		for (idx = 0; idx < iface->num_altsetting; idx++) {
-			alts = &iface->altsetting[idx];
-			i = alts->desc.bAlternateSetting;
-			if (alts->desc.bInterfaceClass != USB_CLASS_AUDIO || alts->desc.bInterfaceSubClass != 2)
-				continue;
-			if (alts->desc.bNumEndpoints < 1) {
-				/* altsetting 0 should never have iso EPs */
-				if (i != 0)
-				printk(KERN_ERR "usbaudio: device %u interface %u altsetting %u does not have an endpoint\n", 
-				       dev->devnum, asifout, i);
-				continue;
-			}
-			if ((alts->endpoint[0].desc.bmAttributes & 0x03) != 0x01 ||
-			    (alts->endpoint[0].desc.bEndpointAddress & 0x80)) {
-				printk(KERN_ERR "usbaudio: device %u interface %u altsetting %u first endpoint not isochronous out\n", 
-				       dev->devnum, asifout, i);
-				continue;
-			}
-			/* See USB audio formats manual, section 2 */
-			fmt = find_csinterface_descriptor(buffer, buflen, NULL, AS_GENERAL, asifout, i);
-			if (!fmt) {
-				printk(KERN_ERR "usbaudio: device %u interface %u altsetting %u FORMAT_TYPE descriptor not found\n", 
-				       dev->devnum, asifout, i);
-				continue;
-			}
-			if (fmt[0] < 7 || fmt[6] != 0 || (fmt[5] != 1 && fmt[5] != 2)) {
-				printk(KERN_ERR "usbaudio: device %u interface %u altsetting %u format not supported\n", 
-				       dev->devnum, asifout, i);
-				continue;
-			}
-			format = (fmt[5] == 2) ? (AFMT_U16_LE | AFMT_U8) : (AFMT_S16_LE | AFMT_S8);
-			/* Dallas DS4201 workaround */
-			if (le16_to_cpu(dev->descriptor.idVendor) == 0x04fa && 
-			    le16_to_cpu(dev->descriptor.idProduct) == 0x4201)
-				format = (AFMT_S16_LE | AFMT_S8);
-			fmt = find_csinterface_descriptor(buffer, buflen, NULL, FORMAT_TYPE, asifout, i);
-			if (!fmt) {
-				printk(KERN_ERR "usbaudio: device %u interface %u altsetting %u FORMAT_TYPE descriptor not found\n", 
-				       dev->devnum, asifout, i);
-				continue;
-			}
-			if (fmt[0] < 8+3*(fmt[7] ? fmt[7] : 2) || fmt[3] != 1) {
-				printk(KERN_ERR "usbaudio: device %u interface %u altsetting %u FORMAT_TYPE descriptor not supported\n", 
-				       dev->devnum, asifout, i);
-				continue;
-			}
-			if (fmt[4] < 1 || fmt[4] > 2 || fmt[5] < 1 || fmt[5] > 2) {
-				printk(KERN_ERR "usbaudio: device %u interface %u altsetting %u unsupported channels %u framesize %u\n", 
-				       dev->devnum, asifout, i, fmt[4], fmt[5]);
-				continue;
-			}
-			csep = find_descriptor(buffer, buflen, NULL, USB_DT_CS_ENDPOINT, asifout, i);
-			if (!csep || csep[0] < 7 || csep[2] != EP_GENERAL) {
-				printk(KERN_ERR "usbaudio: device %u interface %u altsetting %u no or invalid class specific endpoint descriptor\n", 
-				       dev->devnum, asifout, i);
-				continue;
-			}
-			if (as->numfmtout >= MAXFORMATS)
-				continue;
-			fp = &as->fmtout[as->numfmtout++];
-			if (fmt[5] == 2)
-				format &= (AFMT_U16_LE | AFMT_S16_LE);
-			else
-				format &= (AFMT_U8 | AFMT_S8);
-			if (fmt[4] == 2)
-				format |= AFMT_STEREO;
-			fp->format = format;
-			fp->altsetting = i;
-			fp->sratelo = fp->sratehi = fmt[8] | (fmt[9] << 8) | (fmt[10] << 16);
-			printk(KERN_INFO "usbaudio: valid output sample rate %u\n", fp->sratelo);
-			for (j = fmt[7] ? (fmt[7]-1) : 1; j > 0; j--) {
-				k = fmt[8+3*j] | (fmt[9+3*j] << 8) | (fmt[10+3*j] << 16);
-				printk(KERN_INFO "usbaudio: valid output sample rate %u\n", k);
-				if (k > fp->sratehi)
-					fp->sratehi = k;
-				if (k < fp->sratelo)
-					fp->sratelo = k;
-			}
-			fp->attributes = csep[3];
-			printk(KERN_INFO "usbaudio: device %u interface %u altsetting %u: format 0x%08x sratelo %u sratehi %u attributes 0x%02x\n", 
-			       dev->devnum, asifout, i, fp->format, fp->sratelo, fp->sratehi, fp->attributes);
-		}
-	}
-	if (as->numfmtin == 0 && as->numfmtout == 0) {
-		usb_free_urb(as->usbin.durb[0].urb);
-		usb_free_urb(as->usbin.durb[1].urb);
-		usb_free_urb(as->usbin.surb[0].urb);
-		usb_free_urb(as->usbin.surb[1].urb);
-		usb_free_urb(as->usbout.durb[0].urb);
-		usb_free_urb(as->usbout.durb[1].urb);
-		usb_free_urb(as->usbout.surb[0].urb);
-		usb_free_urb(as->usbout.surb[1].urb);
-		kfree(as);
-		return;
-	}
-	if ((as->dev_audio = register_sound_dsp(&usb_audio_fops, -1)) < 0) {
-		printk(KERN_ERR "usbaudio: cannot register dsp\n");
-		usb_free_urb(as->usbin.durb[0].urb);
-		usb_free_urb(as->usbin.durb[1].urb);
-		usb_free_urb(as->usbin.surb[0].urb);
-		usb_free_urb(as->usbin.surb[1].urb);
-		usb_free_urb(as->usbout.durb[0].urb);
-		usb_free_urb(as->usbout.durb[1].urb);
-		usb_free_urb(as->usbout.surb[0].urb);
-		usb_free_urb(as->usbout.surb[1].urb);
-		kfree(as);
-		return;
-	}
-	printk(KERN_INFO "usbaudio: registered dsp 14,%d\n", as->dev_audio);
-	/* everything successful */
-	list_add_tail(&as->list, &s->audiolist);
-}
-
-struct consmixstate {
-	struct usb_audio_state *s;
-	unsigned char *buffer;
-	unsigned int buflen;
-	unsigned int ctrlif;
-	struct mixerchannel mixch[SOUND_MIXER_NRDEVICES];
-	unsigned int nrmixch;
-	unsigned int mixchmask;
-	unsigned long unitbitmap[32/sizeof(unsigned long)];
-	/* return values */
-	unsigned int nrchannels;
-	unsigned int termtype;
-	unsigned int chconfig;
-};
-
-static struct mixerchannel *getmixchannel(struct consmixstate *state, unsigned int nr)
-{
-	struct mixerchannel *c;
-
-	if (nr >= SOUND_MIXER_NRDEVICES) {
-		printk(KERN_ERR "usbaudio: invalid OSS mixer channel %u\n", nr);
-		return NULL;
-	}
-	if (!(state->mixchmask & (1 << nr))) {
-		printk(KERN_WARNING "usbaudio: OSS mixer channel %u already in use\n", nr);
-		return NULL;
-	}
-	c = &state->mixch[state->nrmixch++];
-	c->osschannel = nr;
-	state->mixchmask &= ~(1 << nr);
-	return c;
-}
-
-static unsigned int getvolchannel(struct consmixstate *state)
-{
-	unsigned int u;
-
-	if ((state->termtype & 0xff00) == 0x0000 && (state->mixchmask & SOUND_MASK_VOLUME))
-		return SOUND_MIXER_VOLUME;
-	if ((state->termtype & 0xff00) == 0x0100) {
-		if (state->mixchmask & SOUND_MASK_PCM)
-			return SOUND_MIXER_PCM;
-		if (state->mixchmask & SOUND_MASK_ALTPCM)
-			return SOUND_MIXER_ALTPCM;
-	}
-	if ((state->termtype & 0xff00) == 0x0200 && (state->mixchmask & SOUND_MASK_MIC))
-		return SOUND_MIXER_MIC;
-	if ((state->termtype & 0xff00) == 0x0300 && (state->mixchmask & SOUND_MASK_SPEAKER))
-		return SOUND_MIXER_SPEAKER;
-	if ((state->termtype & 0xff00) == 0x0500) {
-		if (state->mixchmask & SOUND_MASK_PHONEIN)
-			return SOUND_MIXER_PHONEIN;
-		if (state->mixchmask & SOUND_MASK_PHONEOUT)
-			return SOUND_MIXER_PHONEOUT;
-	}
-	if (state->termtype >= 0x710 && state->termtype <= 0x711 && (state->mixchmask & SOUND_MASK_RADIO))
-		return SOUND_MIXER_RADIO;
-	if (state->termtype >= 0x709 && state->termtype <= 0x70f && (state->mixchmask & SOUND_MASK_VIDEO))
-		return SOUND_MIXER_VIDEO;
-	u = ffs(state->mixchmask & (SOUND_MASK_LINE | SOUND_MASK_CD | SOUND_MASK_LINE1 | SOUND_MASK_LINE2 | SOUND_MASK_LINE3 |
-				    SOUND_MASK_DIGITAL1 | SOUND_MASK_DIGITAL2 | SOUND_MASK_DIGITAL3));
-	return u-1;
-}
-
-static void prepmixch(struct consmixstate *state)
-{
-	struct usb_device *dev = state->s->usbdev;
-	struct mixerchannel *ch;
-	unsigned char *buf;
-	__s16 v1;
-	unsigned int v2, v3;
-
-	if (!state->nrmixch || state->nrmixch > SOUND_MIXER_NRDEVICES)
-		return;
-	buf = kmalloc(sizeof(*buf) * 2, GFP_KERNEL);
-	if (!buf) {
-		printk(KERN_ERR "prepmixch: out of memory\n") ;
-		return;
-	}
-
-	ch = &state->mixch[state->nrmixch-1];
-	switch (ch->selector) {
-	case 0:  /* mixer unit request */
-		if (usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), GET_MIN, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN,
-				    (ch->chnum << 8) | 1, state->ctrlif | (ch->unitid << 8), buf, 2, 1000) < 0)
-			goto err;
-		ch->minval = buf[0] | (buf[1] << 8);
-		if (usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), GET_MAX, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN,
-				    (ch->chnum << 8) | 1, state->ctrlif | (ch->unitid << 8), buf, 2, 1000) < 0)
-			goto err;
-		ch->maxval = buf[0] | (buf[1] << 8);
-		v2 = ch->maxval - ch->minval;
-		if (!v2)
-			v2 = 1;
-		if (usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), GET_CUR, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN,
-				    (ch->chnum << 8) | 1, state->ctrlif | (ch->unitid << 8), buf, 2, 1000) < 0)
-			goto err;
-		v1 = buf[0] | (buf[1] << 8);
-		v3 = v1 - ch->minval;
-		v3 = 100 * v3 / v2;
-		if (v3 > 100)
-			v3 = 100;
-		ch->value = v3;
-		if (ch->flags & (MIXFLG_STEREOIN | MIXFLG_STEREOOUT)) {
-			if (usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), GET_CUR, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN,
-					    ((ch->chnum + !!(ch->flags & MIXFLG_STEREOIN)) << 8) | (1 + !!(ch->flags & MIXFLG_STEREOOUT)),
-					    state->ctrlif | (ch->unitid << 8), buf, 2, 1000) < 0)
-			goto err;
-			v1 = buf[0] | (buf[1] << 8);
-			v3 = v1 - ch->minval;
-			v3 = 100 * v3 / v2;
-			if (v3 > 100)
-				v3 = 100;
-		}
-		ch->value |= v3 << 8;
-		break;
-
-		/* various feature unit controls */
-	case VOLUME_CONTROL:
-		if (usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), GET_MIN, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN,
-				    (ch->selector << 8) | ch->chnum, state->ctrlif | (ch->unitid << 8), buf, 2, 1000) < 0)
-			goto err;
-		ch->minval = buf[0] | (buf[1] << 8);
-		if (usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), GET_MAX, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN,
-				    (ch->selector << 8) | ch->chnum, state->ctrlif | (ch->unitid << 8), buf, 2, 1000) < 0)
-			goto err;
-		ch->maxval = buf[0] | (buf[1] << 8);
-		if (usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), GET_CUR, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN,
-				    (ch->selector << 8) | ch->chnum, state->ctrlif | (ch->unitid << 8), buf, 2, 1000) < 0)
-			goto err;
-		v1 = buf[0] | (buf[1] << 8);
-		v2 = ch->maxval - ch->minval;
-		v3 = v1 - ch->minval;
-		if (!v2)
-			v2 = 1;
-		v3 = 100 * v3 / v2;
-		if (v3 > 100)
-			v3 = 100;
-		ch->value = v3;
-		if (ch->flags & (MIXFLG_STEREOIN | MIXFLG_STEREOOUT)) {
-			if (usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), GET_CUR, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN,
-					    (ch->selector << 8) | (ch->chnum + 1), state->ctrlif | (ch->unitid << 8), buf, 2, 1000) < 0)
-				goto err;
-			v1 = buf[0] | (buf[1] << 8);
-			v3 = v1 - ch->minval;
-			v3 = 100 * v3 / v2;
-			if (v3 > 100)
-				v3 = 100;
-		}
-		ch->value |= v3 << 8;
-		break;
-		
-	case BASS_CONTROL:
-	case MID_CONTROL:
-	case TREBLE_CONTROL:
-		if (usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), GET_MIN, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN,
-				    (ch->selector << 8) | ch->chnum, state->ctrlif | (ch->unitid << 8), buf, 1, 1000) < 0)
-			goto err;
-		ch->minval = buf[0] << 8;
-		if (usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), GET_MAX, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN,
-				    (ch->selector << 8) | ch->chnum, state->ctrlif | (ch->unitid << 8), buf, 1, 1000) < 0)
-			goto err;
-		ch->maxval = buf[0] << 8;
-		if (usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), GET_CUR, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN,
-				    (ch->selector << 8) | ch->chnum, state->ctrlif | (ch->unitid << 8), buf, 1, 1000) < 0)
-			goto err;
-		v1 = buf[0] << 8;
-		v2 = ch->maxval - ch->minval;
-		v3 = v1 - ch->minval;
-		if (!v2)
-			v2 = 1;
-		v3 = 100 * v3 / v2;
-		if (v3 > 100)
-			v3 = 100;
-		ch->value = v3;
-		if (ch->flags & (MIXFLG_STEREOIN | MIXFLG_STEREOOUT)) {
-			if (usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), GET_CUR, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN,
-					    (ch->selector << 8) | (ch->chnum + 1), state->ctrlif | (ch->unitid << 8), buf, 1, 1000) < 0)
-				goto err;
-			v1 = buf[0] << 8;
-			v3 = v1 - ch->minval;
-			v3 = 100 * v3 / v2;
-			if (v3 > 100)
-				v3 = 100;
-		}
-		ch->value |= v3 << 8;
-		break;
-		
-	default:
-		goto err;
-	}
-
- freebuf:
-	kfree(buf);
-	return;
- err:
-	printk(KERN_ERR "usbaudio: mixer request device %u if %u unit %u ch %u selector %u failed\n", 
-	       dev->devnum, state->ctrlif, ch->unitid, ch->chnum, ch->selector);
-	if (state->nrmixch)
-		state->nrmixch--;
-	goto freebuf;
-}
-
-
-static void usb_audio_recurseunit(struct consmixstate *state, unsigned char unitid);
-
-static inline int checkmixbmap(unsigned char *bmap, unsigned char flg, unsigned int inidx, unsigned int numoch)
-{
-	unsigned int idx;
-
-	idx = inidx*numoch;
-	if (!(bmap[-(idx >> 3)] & (0x80 >> (idx & 7))))
-		return 0;
-	if (!(flg & (MIXFLG_STEREOIN | MIXFLG_STEREOOUT)))
-		return 1;
-	idx = (inidx+!!(flg & MIXFLG_STEREOIN))*numoch+!!(flg & MIXFLG_STEREOOUT);
-	if (!(bmap[-(idx >> 3)] & (0x80 >> (idx & 7))))
-		return 0;
-	return 1;
-}
-
-static void usb_audio_mixerunit(struct consmixstate *state, unsigned char *mixer)
-{
-	unsigned int nroutch = mixer[5+mixer[4]];
-	unsigned int chidx[SOUND_MIXER_NRDEVICES+1];
-	unsigned int termt[SOUND_MIXER_NRDEVICES];
-	unsigned char flg = (nroutch >= 2) ? MIXFLG_STEREOOUT : 0;
-	unsigned char *bmap = &mixer[9+mixer[4]];
-	unsigned int bmapsize;
-	struct mixerchannel *ch;
-	unsigned int i;
-
-	if (!mixer[4]) {
-		printk(KERN_ERR "usbaudio: unit %u invalid MIXER_UNIT descriptor\n", mixer[3]);
-		return;
-	}
-	if (mixer[4] > SOUND_MIXER_NRDEVICES) {
-		printk(KERN_ERR "usbaudio: mixer unit %u: too many input pins\n", mixer[3]);
-		return;
-	}
-	chidx[0] = 0;
-	for (i = 0; i < mixer[4]; i++) {
-		usb_audio_recurseunit(state, mixer[5+i]);
-		chidx[i+1] = chidx[i] + state->nrchannels;
-		termt[i] = state->termtype;
-	}
-	state->termtype = 0;
-	state->chconfig = mixer[6+mixer[4]] | (mixer[7+mixer[4]] << 8);
-	bmapsize = (nroutch * chidx[mixer[4]] + 7) >> 3;
-	bmap += bmapsize - 1;
-	if (mixer[0] < 10+mixer[4]+bmapsize) {
-		printk(KERN_ERR "usbaudio: unit %u invalid MIXER_UNIT descriptor (bitmap too small)\n", mixer[3]);
-		return;
-	}
-	for (i = 0; i < mixer[4]; i++) {
-		state->termtype = termt[i];
-		if (chidx[i+1]-chidx[i] >= 2) {
-			flg |= MIXFLG_STEREOIN;
-			if (checkmixbmap(bmap, flg, chidx[i], nroutch)) {
-				ch = getmixchannel(state, getvolchannel(state));
-				if (ch) {
-					ch->unitid = mixer[3];
-					ch->selector = 0;
-					ch->chnum = chidx[i]+1;
-					ch->flags = flg;
-					prepmixch(state);
-				}
-				continue;
-			}
-		}
-		flg &= ~MIXFLG_STEREOIN;
-		if (checkmixbmap(bmap, flg, chidx[i], nroutch)) {
-			ch = getmixchannel(state, getvolchannel(state));
-			if (ch) {
-				ch->unitid = mixer[3];
-				ch->selector = 0;
-				ch->chnum = chidx[i]+1;
-				ch->flags = flg;
-				prepmixch(state);
-			}
-		}
-	}	
-	state->termtype = 0;
-}
-
-static struct mixerchannel *slctsrc_findunit(struct consmixstate *state, __u8 unitid)
-{
-	unsigned int i;
-	
-	for (i = 0; i < state->nrmixch; i++)
-		if (state->mixch[i].unitid == unitid)
-			return &state->mixch[i];
-	return NULL;
-}
-
-static void usb_audio_selectorunit(struct consmixstate *state, unsigned char *selector)
-{
-	unsigned int chnum, i, mixch;
-	struct mixerchannel *mch;
-
-	if (!selector[4]) {
-		printk(KERN_ERR "usbaudio: unit %u invalid SELECTOR_UNIT descriptor\n", selector[3]);
-		return;
-	}
-	mixch = state->nrmixch;
-	usb_audio_recurseunit(state, selector[5]);
-	if (state->nrmixch != mixch) {
-		mch = &state->mixch[state->nrmixch-1];
-		mch->slctunitid = selector[3] | (1 << 8);
-	} else if ((mch = slctsrc_findunit(state, selector[5]))) {
-		mch->slctunitid = selector[3] | (1 << 8);
-	} else {
-		printk(KERN_INFO "usbaudio: selector unit %u: ignoring channel 1\n", selector[3]);
-	}
-	chnum = state->nrchannels;
-	for (i = 1; i < selector[4]; i++) {
-		mixch = state->nrmixch;
-		usb_audio_recurseunit(state, selector[5+i]);
-		if (chnum != state->nrchannels) {
-			printk(KERN_ERR "usbaudio: selector unit %u: input pins with varying channel numbers\n", selector[3]);
-			state->termtype = 0;
-			state->chconfig = 0;
-			state->nrchannels = 0;
-			return;
-		}
-		if (state->nrmixch != mixch) {
-			mch = &state->mixch[state->nrmixch-1];
-			mch->slctunitid = selector[3] | ((i + 1) << 8);
-		} else if ((mch = slctsrc_findunit(state, selector[5+i]))) {
-			mch->slctunitid = selector[3] | ((i + 1) << 8);
-		} else {
-			printk(KERN_INFO "usbaudio: selector unit %u: ignoring channel %u\n", selector[3], i+1);
-		}
-	}
-	state->termtype = 0;
-	state->chconfig = 0;
-}
-
-/* in the future we might try to handle 3D etc. effect units */
-
-static void usb_audio_processingunit(struct consmixstate *state, unsigned char *proc)
-{
-	unsigned int i;
-
-	for (i = 0; i < proc[6]; i++)
-		usb_audio_recurseunit(state, proc[7+i]);
-	state->nrchannels = proc[7+proc[6]];
-	state->termtype = 0;
-	state->chconfig = proc[8+proc[6]] | (proc[9+proc[6]] << 8);
-}
-
-
-/* See Audio Class Spec, section 4.3.2.5 */
-static void usb_audio_featureunit(struct consmixstate *state, unsigned char *ftr)
-{
-	struct mixerchannel *ch;
-	unsigned short chftr, mchftr;
-#if 0
-	struct usb_device *dev = state->s->usbdev;
-	unsigned char data[1];
-#endif
-	unsigned char nr_logical_channels, i;
-
-	usb_audio_recurseunit(state, ftr[4]);
-
-	if (ftr[5] == 0 ) {
-		printk(KERN_ERR "usbaudio: wrong controls size in feature unit %u\n",ftr[3]);
-		return;
-	}
-
-	if (state->nrchannels == 0) {
-		printk(KERN_ERR "usbaudio: feature unit %u source has no channels\n", ftr[3]);
-		return;
-	}
-	if (state->nrchannels > 2)
-		printk(KERN_WARNING "usbaudio: feature unit %u: OSS mixer interface does not support more than 2 channels\n", ftr[3]);
-
-	nr_logical_channels=(ftr[0]-7)/ftr[5]-1;
-
-	if (nr_logical_channels != state->nrchannels) {
-		printk(KERN_WARNING "usbaudio: warning: found %d of %d logical channels.\n", state->nrchannels,nr_logical_channels);
-
-		if (state->nrchannels == 1 && nr_logical_channels==0) {
-			printk(KERN_INFO "usbaudio: assuming the channel found is the master channel (got a Philips camera?). Should be fine.\n");
-		} else if (state->nrchannels == 1 && nr_logical_channels==2) {
-			printk(KERN_INFO "usbaudio: assuming that a stereo channel connected directly to a mixer is missing in search (got Labtec headset?). Should be fine.\n");
-			state->nrchannels=nr_logical_channels;
-		} else {
-			printk(KERN_WARNING "usbaudio: no idea what's going on..., contact linux-usb-devel@lists.sourceforge.net\n");
-		}
-	}
-
-	/* There is always a master channel */
-	mchftr = ftr[6];
-	/* Binary AND over logical channels if they exist */
-	if (nr_logical_channels) {
-		chftr = ftr[6+ftr[5]];
-		for (i = 2; i <= nr_logical_channels; i++)
-			chftr &= ftr[6+i*ftr[5]];
-	} else {
-		chftr = 0;
-	}
-
-	/* volume control */
-	if (chftr & 2) {
-		ch = getmixchannel(state, getvolchannel(state));
-		if (ch) {
-			ch->unitid = ftr[3];
-			ch->selector = VOLUME_CONTROL;
-			ch->chnum = 1;
-			ch->flags = (state->nrchannels > 1) ? (MIXFLG_STEREOIN | MIXFLG_STEREOOUT) : 0;
-			prepmixch(state);
-		}
-	} else if (mchftr & 2) {
-		ch = getmixchannel(state, getvolchannel(state));
-		if (ch) {
-			ch->unitid = ftr[3];
-			ch->selector = VOLUME_CONTROL;
-			ch->chnum = 0;
-			ch->flags = 0;
-			prepmixch(state);
-		}
-	}
-	/* bass control */
-	if (chftr & 4) {
-		ch = getmixchannel(state, SOUND_MIXER_BASS);
-		if (ch) {
-			ch->unitid = ftr[3];
-			ch->selector = BASS_CONTROL;
-			ch->chnum = 1;
-			ch->flags = (state->nrchannels > 1) ? (MIXFLG_STEREOIN | MIXFLG_STEREOOUT) : 0;
-			prepmixch(state);
-		}
-	} else if (mchftr & 4) {
-		ch = getmixchannel(state, SOUND_MIXER_BASS);
-		if (ch) {
-			ch->unitid = ftr[3];
-			ch->selector = BASS_CONTROL;
-			ch->chnum = 0;
-			ch->flags = 0;
-			prepmixch(state);
-		}
-	}
-	/* treble control */
-	if (chftr & 16) {
-		ch = getmixchannel(state, SOUND_MIXER_TREBLE);
-		if (ch) {
-			ch->unitid = ftr[3];
-			ch->selector = TREBLE_CONTROL;
-			ch->chnum = 1;
-			ch->flags = (state->nrchannels > 1) ? (MIXFLG_STEREOIN | MIXFLG_STEREOOUT) : 0;
-			prepmixch(state);
-		}
-	} else if (mchftr & 16) {
-		ch = getmixchannel(state, SOUND_MIXER_TREBLE);
-		if (ch) {
-			ch->unitid = ftr[3];
-			ch->selector = TREBLE_CONTROL;
-			ch->chnum = 0;
-			ch->flags = 0;
-			prepmixch(state);
-		}
-	}
-#if 0
-	/* if there are mute controls, unmute them */
-	/* does not seem to be necessary, and the Dallas chip does not seem to support the "all" channel (255) */
-	if ((chftr & 1) || (mchftr & 1)) {
-		printk(KERN_DEBUG "usbaudio: unmuting feature unit %u interface %u\n", ftr[3], state->ctrlif);
-		data[0] = 0;
-		if (usb_control_msg(dev, usb_sndctrlpipe(dev, 0), SET_CUR, USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_OUT,
-				    (MUTE_CONTROL << 8) | 0xff, state->ctrlif | (ftr[3] << 8), data, 1, 1000) < 0)
-			printk(KERN_WARNING "usbaudio: failure to unmute feature unit %u interface %u\n", ftr[3], state->ctrlif);
- 	}
-#endif
-}
-
-static void usb_audio_recurseunit(struct consmixstate *state, unsigned char unitid)
-{
-	unsigned char *p1;
-	unsigned int i, j;
-
-	if (test_and_set_bit(unitid, state->unitbitmap)) {
-		printk(KERN_INFO "usbaudio: mixer path revisits unit %d\n", unitid);
-		return;
-	}
-	p1 = find_audiocontrol_unit(state->buffer, state->buflen, NULL, unitid, state->ctrlif);
-	if (!p1) {
-		printk(KERN_ERR "usbaudio: unit %d not found!\n", unitid);
-		return;
-	}
-	state->nrchannels = 0;
-	state->termtype = 0;
-	state->chconfig = 0;
-	switch (p1[2]) {
-	case INPUT_TERMINAL:
-		if (p1[0] < 12) {
-			printk(KERN_ERR "usbaudio: unit %u: invalid INPUT_TERMINAL descriptor\n", unitid);
-			return;
-		}
-		state->nrchannels = p1[7];
-		state->termtype = p1[4] | (p1[5] << 8);
-		state->chconfig = p1[8] | (p1[9] << 8);
-		return;
-
-	case MIXER_UNIT:
-		if (p1[0] < 10 || p1[0] < 10+p1[4]) {
-			printk(KERN_ERR "usbaudio: unit %u: invalid MIXER_UNIT descriptor\n", unitid);
-			return;
-		}
-		usb_audio_mixerunit(state, p1);
-		return;
-
-	case SELECTOR_UNIT:
-		if (p1[0] < 6 || p1[0] < 6+p1[4]) {
-			printk(KERN_ERR "usbaudio: unit %u: invalid SELECTOR_UNIT descriptor\n", unitid);
-			return;
-		}
-		usb_audio_selectorunit(state, p1);
-		return;
-
-	case FEATURE_UNIT: /* See USB Audio Class Spec 4.3.2.5 */
-		if (p1[0] < 7 || p1[0] < 7+p1[5]) {
-			printk(KERN_ERR "usbaudio: unit %u: invalid FEATURE_UNIT descriptor\n", unitid);
-			return;
-		}
-		usb_audio_featureunit(state, p1);
-		return;		
-
-	case PROCESSING_UNIT:
-		if (p1[0] < 13 || p1[0] < 13+p1[6] || p1[0] < 13+p1[6]+p1[11+p1[6]]) {
-			printk(KERN_ERR "usbaudio: unit %u: invalid PROCESSING_UNIT descriptor\n", unitid);
-			return;
-		}
-		usb_audio_processingunit(state, p1);
-		return;		
-
-	case EXTENSION_UNIT:
-		if (p1[0] < 13 || p1[0] < 13+p1[6] || p1[0] < 13+p1[6]+p1[11+p1[6]]) {
-			printk(KERN_ERR "usbaudio: unit %u: invalid EXTENSION_UNIT descriptor\n", unitid);
-			return;
-		}
-		for (j = i = 0; i < p1[6]; i++) {
-			usb_audio_recurseunit(state, p1[7+i]);
-			if (!i)
-				j = state->termtype;
-			else if (j != state->termtype)
-				j = 0;
-		}
-		state->nrchannels = p1[7+p1[6]];
-		state->chconfig = p1[8+p1[6]] | (p1[9+p1[6]] << 8);
-		state->termtype = j;
-		return;
-
-	default:
-		printk(KERN_ERR "usbaudio: unit %u: unexpected type 0x%02x\n", unitid, p1[2]);
-		return;
-	}
-}
-
-static void usb_audio_constructmixer(struct usb_audio_state *s, unsigned char *buffer, unsigned int buflen, unsigned int ctrlif, unsigned char *oterm)
-{
-	struct usb_mixerdev *ms;
-	struct consmixstate state;
-
-	memset(&state, 0, sizeof(state));
-	state.s = s;
-	state.nrmixch = 0;
-	state.mixchmask = ~0;
-	state.buffer = buffer;
-	state.buflen = buflen;
-	state.ctrlif = ctrlif;
-	set_bit(oterm[3], state.unitbitmap);  /* mark terminal ID as visited */
-	printk(KERN_DEBUG "usbaudio: constructing mixer for Terminal %u type 0x%04x\n",
-	       oterm[3], oterm[4] | (oterm[5] << 8));
-	usb_audio_recurseunit(&state, oterm[7]);
-	if (!state.nrmixch) {
-		printk(KERN_INFO "usbaudio: no mixer controls found for Terminal %u\n", oterm[3]);
-		return;
-	}
-	if (!(ms = kmalloc(sizeof(struct usb_mixerdev)+state.nrmixch*sizeof(struct mixerchannel), GFP_KERNEL)))
-		return;
-	memset(ms, 0, sizeof(struct usb_mixerdev));
-	memcpy(&ms->ch, &state.mixch, state.nrmixch*sizeof(struct mixerchannel));
-	ms->state = s;
-	ms->iface = ctrlif;
-	ms->numch = state.nrmixch;
-	if ((ms->dev_mixer = register_sound_mixer(&usb_mixer_fops, -1)) < 0) {
-		printk(KERN_ERR "usbaudio: cannot register mixer\n");
-		kfree(ms);
-		return;
-	}
-	printk(KERN_INFO "usbaudio: registered mixer 14,%d\n", ms->dev_mixer);
-	list_add_tail(&ms->list, &s->mixerlist);
-}
-
-/* arbitrary limit, we won't check more interfaces than this */
-#define USB_MAXINTERFACES	32
-
-static struct usb_audio_state *usb_audio_parsecontrol(struct usb_device *dev, unsigned char *buffer, unsigned int buflen, unsigned int ctrlif)
-{
-	struct usb_audio_state *s;
-	struct usb_interface *iface;
-	struct usb_host_interface *alt;
-	unsigned char ifin[USB_MAXINTERFACES], ifout[USB_MAXINTERFACES];
-	unsigned char *p1;
-	unsigned int i, j, k, numifin = 0, numifout = 0;
-	
-	if (!(s = kmalloc(sizeof(struct usb_audio_state), GFP_KERNEL)))
-		return NULL;
-	memset(s, 0, sizeof(struct usb_audio_state));
-	INIT_LIST_HEAD(&s->audiolist);
-	INIT_LIST_HEAD(&s->mixerlist);
-	s->usbdev = dev;
-	s->count = 1;
-
-	/* find audiocontrol interface */
-	if (!(p1 = find_csinterface_descriptor(buffer, buflen, NULL, HEADER, ctrlif, -1))) {
-		printk(KERN_ERR "usbaudio: device %d audiocontrol interface %u no HEADER found\n",
-		       dev->devnum, ctrlif);
-		goto ret;
-	}
-	if (p1[0] < 8 + p1[7]) {
-		printk(KERN_ERR "usbaudio: device %d audiocontrol interface %u HEADER error\n",
-		       dev->devnum, ctrlif);
-		goto ret;
-	}
-	if (!p1[7])
-		printk(KERN_INFO "usbaudio: device %d audiocontrol interface %u has no AudioStreaming and MidiStreaming interfaces\n",
-		       dev->devnum, ctrlif);
-	for (i = 0; i < p1[7]; i++) {
-		j = p1[8+i];
-		iface = usb_ifnum_to_if(dev, j);
-		if (!iface) {
-			printk(KERN_ERR "usbaudio: device %d audiocontrol interface %u interface %u does not exist\n",
-			       dev->devnum, ctrlif, j);
-			continue;
-		}
-		if (iface->num_altsetting == 1) {
-			printk(KERN_ERR "usbaudio: device %d audiocontrol interface %u has only 1 altsetting.\n", dev->devnum, ctrlif);
-			continue;
-		}
-		alt = usb_altnum_to_altsetting(iface, 0);
-		if (!alt) {
-			printk(KERN_ERR "usbaudio: device %d audiocontrol interface %u interface %u has no altsetting 0\n",
-			       dev->devnum, ctrlif, j);
-			continue;
-		}
-		if (alt->desc.bInterfaceClass != USB_CLASS_AUDIO) {
-			printk(KERN_ERR "usbaudio: device %d audiocontrol interface %u interface %u is not an AudioClass interface\n",
-			       dev->devnum, ctrlif, j);
-			continue;
-		}
-		if (alt->desc.bInterfaceSubClass == 3) {
-			printk(KERN_INFO "usbaudio: device %d audiocontrol interface %u interface %u MIDIStreaming not supported\n",
-			       dev->devnum, ctrlif, j);
-			continue;
-		}
-		if (alt->desc.bInterfaceSubClass != 2) {
-			printk(KERN_ERR "usbaudio: device %d audiocontrol interface %u interface %u invalid AudioClass subtype\n",
-			       dev->devnum, ctrlif, j);
-			continue;
-		}
-		if (alt->desc.bNumEndpoints > 0) {
-			/* Check all endpoints; should they all have a bandwidth of 0 ? */
-			for (k = 0; k < alt->desc.bNumEndpoints; k++) {
-				if (le16_to_cpu(alt->endpoint[k].desc.wMaxPacketSize) > 0) {
-					printk(KERN_ERR "usbaudio: device %d audiocontrol interface %u endpoint %d does not have 0 bandwidth at alt[0]\n", dev->devnum, ctrlif, k);
-					break;
-				}
-			}
-			if (k < alt->desc.bNumEndpoints)
-				continue;
-		}
-
-		alt = usb_altnum_to_altsetting(iface, 1);
-		if (!alt) {
-			printk(KERN_ERR "usbaudio: device %d audiocontrol interface %u interface %u has no altsetting 1\n",
-			       dev->devnum, ctrlif, j);
-			continue;
-		}
-		if (alt->desc.bNumEndpoints < 1) {
-			printk(KERN_ERR "usbaudio: device %d audiocontrol interface %u interface %u has no endpoint\n",
-			       dev->devnum, ctrlif, j);
-			continue;
-		}
-		/* note: this requires the data endpoint to be ep0 and the optional sync
-		   ep to be ep1, which seems to be the case */
-		if (alt->endpoint[0].desc.bEndpointAddress & USB_DIR_IN) {
-			if (numifin < USB_MAXINTERFACES) {
-				ifin[numifin++] = j;
-				usb_driver_claim_interface(&usb_audio_driver, iface, (void *)-1);
-			}
-		} else {
-			if (numifout < USB_MAXINTERFACES) {
-				ifout[numifout++] = j;
-				usb_driver_claim_interface(&usb_audio_driver, iface, (void *)-1);
-			}
-		}
-	}
-	printk(KERN_INFO "usbaudio: device %d audiocontrol interface %u has %u input and %u output AudioStreaming interfaces\n",
-	       dev->devnum, ctrlif, numifin, numifout);
-	for (i = 0; i < numifin && i < numifout; i++)
-		usb_audio_parsestreaming(s, buffer, buflen, ifin[i], ifout[i]);
-	for (j = i; j < numifin; j++)
-		usb_audio_parsestreaming(s, buffer, buflen, ifin[i], -1);
-	for (j = i; j < numifout; j++)
-		usb_audio_parsestreaming(s, buffer, buflen, -1, ifout[i]);
-	/* now walk through all OUTPUT_TERMINAL descriptors to search for mixers */
-	p1 = find_csinterface_descriptor(buffer, buflen, NULL, OUTPUT_TERMINAL, ctrlif, -1);
-	while (p1) {
-		if (p1[0] >= 9)
-			usb_audio_constructmixer(s, buffer, buflen, ctrlif, p1);
-		p1 = find_csinterface_descriptor(buffer, buflen, p1, OUTPUT_TERMINAL, ctrlif, -1);
-	}
-
-ret:
-	if (list_empty(&s->audiolist) && list_empty(&s->mixerlist)) {
-		kfree(s);
-		return NULL;
-	}
-	/* everything successful */
-	down(&open_sem);
-	list_add_tail(&s->audiodev, &audiodevs);
-	up(&open_sem);
-	printk(KERN_DEBUG "usb_audio_parsecontrol: usb_audio_state at %p\n", s);
-	return s;
-}
-
-/* we only care for the currently active configuration */
-
-static int usb_audio_probe(struct usb_interface *intf,
-			   const struct usb_device_id *id)
-{
-	struct usb_device *dev = interface_to_usbdev (intf);
-	struct usb_audio_state *s;
-	unsigned char *buffer;
-	unsigned int buflen;
-
-#if 0
-	printk(KERN_DEBUG "usbaudio: Probing if %i: IC %x, ISC %x\n", ifnum,
-	       config->interface[ifnum].altsetting[0].desc.bInterfaceClass,
-	       config->interface[ifnum].altsetting[0].desc.bInterfaceSubClass);
-#endif
-
-	/*
-	 * audiocontrol interface found
-	 * find which configuration number is active
-	 */
-	buffer = dev->rawdescriptors[dev->actconfig - dev->config];
-	buflen = le16_to_cpu(dev->actconfig->desc.wTotalLength);
-	s = usb_audio_parsecontrol(dev, buffer, buflen, intf->altsetting->desc.bInterfaceNumber);
-	if (s) {
-		usb_set_intfdata (intf, s);
-		return 0;
-	}
-	return -ENODEV;
-}
-
-
-/* a revoke facility would make things simpler */
-
-static void usb_audio_disconnect(struct usb_interface *intf)
-{
-	struct usb_audio_state *s = usb_get_intfdata (intf);
-	struct usb_audiodev *as;
-	struct usb_mixerdev *ms;
-
-	if (!s)
-		return;
-
-	/* we get called with -1 for every audiostreaming interface registered */
-	if (s == (struct usb_audio_state *)-1) {
-		dprintk((KERN_DEBUG "usbaudio: note, usb_audio_disconnect called with -1\n"));
-		return;
-	}
-	if (!s->usbdev) {
-		dprintk((KERN_DEBUG "usbaudio: error,  usb_audio_disconnect already called for %p!\n", s));
-		return;
-	}
-	down(&open_sem);
-	list_del_init(&s->audiodev);
-	s->usbdev = NULL;
-	usb_set_intfdata (intf, NULL);
-
-	/* deregister all audio and mixer devices, so no new processes can open this device */
-	list_for_each_entry(as, &s->audiolist, list) {
-		usbin_disc(as);
-		usbout_disc(as);
-		wake_up(&as->usbin.dma.wait);
-		wake_up(&as->usbout.dma.wait);
-		if (as->dev_audio >= 0) {
-			unregister_sound_dsp(as->dev_audio);
-			printk(KERN_INFO "usbaudio: unregister dsp 14,%d\n", as->dev_audio);
-		}
-		as->dev_audio = -1;
-	}
-	list_for_each_entry(ms, &s->mixerlist, list) {
-		if (ms->dev_mixer >= 0) {
-			unregister_sound_mixer(ms->dev_mixer);
-			printk(KERN_INFO "usbaudio: unregister mixer 14,%d\n", ms->dev_mixer);
-		}
-		ms->dev_mixer = -1;
-	}
-	release(s);
-	wake_up(&open_wait);
-}
-
-static int __init usb_audio_init(void)
-{
-	int result = usb_register(&usb_audio_driver);
-	if (result == 0) 
-		info(DRIVER_VERSION ":" DRIVER_DESC);
-	return result;
-}
-
-
-static void __exit usb_audio_cleanup(void)
-{
-	usb_deregister(&usb_audio_driver);
-}
-
-module_init(usb_audio_init);
-module_exit(usb_audio_cleanup);
-
-MODULE_AUTHOR( DRIVER_AUTHOR );
-MODULE_DESCRIPTION( DRIVER_DESC );
-MODULE_LICENSE("GPL");
-