X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=sound%2Fusb%2Fusbaudio.c;h=4e614ac39f2194e22c227ca7854377a6964bed18;hb=43bc926fffd92024b46cafaf7350d669ba9ca884;hp=aae66144d411ce579eee7185b8e3cca84e730d9e;hpb=cee37fe97739d85991964371c1f3a745c00dd236;p=linux-2.6.git

diff --git a/sound/usb/usbaudio.c b/sound/usb/usbaudio.c
index aae66144d..4e614ac39 100644
--- a/sound/usb/usbaudio.c
+++ b/sound/usb/usbaudio.c
@@ -45,7 +45,9 @@
 #include <linux/slab.h>
 #include <linux/string.h>
 #include <linux/usb.h>
+#include <linux/vmalloc.h>
 #include <linux/moduleparam.h>
+#include <linux/mutex.h>
 #include <sound/core.h>
 #include <sound/info.h>
 #include <sound/pcm.h>
@@ -68,6 +70,7 @@ static int vid[SNDRV_CARDS] = { [0 ... (SNDRV_CARDS-1)] = -1 }; /* Vendor ID for
 static int pid[SNDRV_CARDS] = { [0 ... (SNDRV_CARDS-1)] = -1 }; /* Product ID for this card */
 static int nrpacks = 4;		/* max. number of packets per urb */
 static int async_unlink = 1;
+static int device_setup[SNDRV_CARDS]; /* device parameter for this card*/
 
 module_param_array(index, int, NULL, 0444);
 MODULE_PARM_DESC(index, "Index value for the USB audio adapter.");
@@ -79,10 +82,12 @@ module_param_array(vid, int, NULL, 0444);
 MODULE_PARM_DESC(vid, "Vendor ID for the USB audio device.");
 module_param_array(pid, int, NULL, 0444);
 MODULE_PARM_DESC(pid, "Product ID for the USB audio device.");
-module_param(nrpacks, int, 0444);
+module_param(nrpacks, int, 0644);
 MODULE_PARM_DESC(nrpacks, "Max. number of packets per URB.");
 module_param(async_unlink, bool, 0444);
 MODULE_PARM_DESC(async_unlink, "Use async unlink mode.");
+module_param_array(device_setup, int, NULL, 0444);
+MODULE_PARM_DESC(device_setup, "Specific device setup (if needed).");
 
 
 /*
@@ -97,14 +102,10 @@ MODULE_PARM_DESC(async_unlink, "Use async unlink mode.");
 
 #define MAX_PACKS	10
 #define MAX_PACKS_HS	(MAX_PACKS * 8)	/* in high speed mode */
-#define MAX_URBS	5	/* max. 20ms long packets */
-#define SYNC_URBS	2	/* always two urbs for sync */
+#define MAX_URBS	8
+#define SYNC_URBS	4	/* always four urbs for sync */
 #define MIN_PACKS_URB	1	/* minimum 1 packet per urb */
 
-typedef struct snd_usb_substream snd_usb_substream_t;
-typedef struct snd_usb_stream snd_usb_stream_t;
-typedef struct snd_urb_ctx snd_urb_ctx_t;
-
 struct audioformat {
 	struct list_head list;
 	snd_pcm_format_t format;	/* format type */
@@ -124,26 +125,27 @@ struct audioformat {
 	unsigned int *rate_table;	/* rate table */
 };
 
+struct snd_usb_substream;
+
 struct snd_urb_ctx {
 	struct urb *urb;
-	snd_usb_substream_t *subs;
+	unsigned int buffer_size;	/* size of data buffer, if data URB */
+	struct snd_usb_substream *subs;
 	int index;	/* index for urb array */
 	int packets;	/* number of packets per urb */
-	int transfer;	/* transferred size */
-	char *buf;	/* buffer for capture */
 };
 
 struct snd_urb_ops {
-	int (*prepare)(snd_usb_substream_t *subs, snd_pcm_runtime_t *runtime, struct urb *u);
-	int (*retire)(snd_usb_substream_t *subs, snd_pcm_runtime_t *runtime, struct urb *u);
-	int (*prepare_sync)(snd_usb_substream_t *subs, snd_pcm_runtime_t *runtime, struct urb *u);
-	int (*retire_sync)(snd_usb_substream_t *subs, snd_pcm_runtime_t *runtime, struct urb *u);
+	int (*prepare)(struct snd_usb_substream *subs, struct snd_pcm_runtime *runtime, struct urb *u);
+	int (*retire)(struct snd_usb_substream *subs, struct snd_pcm_runtime *runtime, struct urb *u);
+	int (*prepare_sync)(struct snd_usb_substream *subs, struct snd_pcm_runtime *runtime, struct urb *u);
+	int (*retire_sync)(struct snd_usb_substream *subs, struct snd_pcm_runtime *runtime, struct urb *u);
 };
 
 struct snd_usb_substream {
-	snd_usb_stream_t *stream;
+	struct snd_usb_stream *stream;
 	struct usb_device *dev;
-	snd_pcm_substream_t *pcm_substream;
+	struct snd_pcm_substream *pcm_substream;
 	int direction;	/* playback or capture */
 	int interface;	/* current interface */
 	int endpoint;	/* assigned endpoint */
@@ -153,6 +155,7 @@ struct snd_usb_substream {
 	unsigned int format;     /* USB data format */
 	unsigned int datapipe;   /* the data i/o pipe */
 	unsigned int syncpipe;   /* 1 - async out or adaptive in */
+	unsigned int datainterval;	/* log_2 of data packet interval */
 	unsigned int syncinterval;  /* P for adaptive mode, 0 otherwise */
 	unsigned int freqn;      /* nominal sampling rate in fs/fps in Q16.16 format */
 	unsigned int freqm;      /* momentary sampling rate in fs/fps in Q16.16 format */
@@ -164,21 +167,20 @@ struct snd_usb_substream {
 	unsigned int curframesize;	/* current packet size in frames (for capture) */
 	unsigned int fill_max: 1;	/* fill max packet size always */
 	unsigned int fmt_type;		/* USB audio format type (1-3) */
+	unsigned int packs_per_ms;	/* packets per millisecond (for playback) */
 
 	unsigned int running: 1;	/* running status */
 
-	unsigned int hwptr;			/* free frame position in the buffer (only for playback) */
 	unsigned int hwptr_done;			/* processed frame position in the buffer */
-	unsigned int transfer_sched;		/* scheduled frames since last period (for playback) */
 	unsigned int transfer_done;		/* processed frames since last period update */
 	unsigned long active_mask;	/* bitmask of active urbs */
 	unsigned long unlink_mask;	/* bitmask of unlinked urbs */
 
 	unsigned int nurbs;			/* # urbs */
-	snd_urb_ctx_t dataurb[MAX_URBS];	/* data urb table */
-	snd_urb_ctx_t syncurb[SYNC_URBS];	/* sync urb table */
-	char syncbuf[SYNC_URBS * MAX_PACKS * 4]; /* sync buffer; it's so small - let's get static */
-	char *tmpbuf;			/* temporary buffer for playback */
+	struct snd_urb_ctx dataurb[MAX_URBS];	/* data urb table */
+	struct snd_urb_ctx syncurb[SYNC_URBS];	/* sync urb table */
+	char *syncbuf;				/* sync buffer for all sync URBs */
+	dma_addr_t sync_dma;			/* DMA address of syncbuf */
 
 	u64 formats;			/* format bitmasks (all or'ed) */
 	unsigned int num_formats;		/* number of supported audio formats (list) */
@@ -190,11 +192,11 @@ struct snd_usb_substream {
 
 
 struct snd_usb_stream {
-	snd_usb_audio_t *chip;
-	snd_pcm_t *pcm;
+	struct snd_usb_audio *chip;
+	struct snd_pcm *pcm;
 	int pcm_index;
 	unsigned int fmt_type;		/* USB audio format type (1-3) */
-	snd_usb_substream_t substream[2];
+	struct snd_usb_substream substream[2];
 	struct list_head list;
 };
 
@@ -204,15 +206,15 @@ struct snd_usb_stream {
  * the all interfaces on the same card as one sound device.
  */
 
-static DECLARE_MUTEX(register_mutex);
-static snd_usb_audio_t *usb_chip[SNDRV_CARDS];
+static DEFINE_MUTEX(register_mutex);
+static struct snd_usb_audio *usb_chip[SNDRV_CARDS];
 
 
 /*
  * convert a sampling rate into our full speed format (fs/1000 in Q16.16)
  * this will overflow at approx 524 kHz
  */
-inline static unsigned get_usb_full_speed_rate(unsigned int rate)
+static inline unsigned get_usb_full_speed_rate(unsigned int rate)
 {
 	return ((rate << 13) + 62) / 125;
 }
@@ -221,19 +223,19 @@ inline static unsigned get_usb_full_speed_rate(unsigned int rate)
  * convert a sampling rate into USB high speed format (fs/8000 in Q16.16)
  * this will overflow at approx 4 MHz
  */
-inline static unsigned get_usb_high_speed_rate(unsigned int rate)
+static inline unsigned get_usb_high_speed_rate(unsigned int rate)
 {
 	return ((rate << 10) + 62) / 125;
 }
 
 /* convert our full speed USB rate into sampling rate in Hz */
-inline static unsigned get_full_speed_hz(unsigned int usb_rate)
+static inline unsigned get_full_speed_hz(unsigned int usb_rate)
 {
 	return (usb_rate * 125 + (1 << 12)) >> 13;
 }
 
 /* convert our high speed USB rate into sampling rate in Hz */
-inline static unsigned get_high_speed_hz(unsigned int usb_rate)
+static inline unsigned get_high_speed_hz(unsigned int usb_rate)
 {
 	return (usb_rate * 125 + (1 << 9)) >> 10;
 }
@@ -245,23 +247,19 @@ inline static unsigned get_high_speed_hz(unsigned int usb_rate)
  * fill the length and offset of each urb descriptor.
  * the fixed 10.14 frequency is passed through the pipe.
  */
-static int prepare_capture_sync_urb(snd_usb_substream_t *subs,
-				    snd_pcm_runtime_t *runtime,
+static int prepare_capture_sync_urb(struct snd_usb_substream *subs,
+				    struct snd_pcm_runtime *runtime,
 				    struct urb *urb)
 {
 	unsigned char *cp = urb->transfer_buffer;
-	snd_urb_ctx_t *ctx = (snd_urb_ctx_t *)urb->context;
-	int i, offs;
+	struct snd_urb_ctx *ctx = (struct snd_urb_ctx *)urb->context;
 
-	urb->number_of_packets = ctx->packets;
 	urb->dev = ctx->subs->dev; /* we need to set this at each time */
-	for (i = offs = 0; i < urb->number_of_packets; i++, offs += 4, cp += 4) {
-		urb->iso_frame_desc[i].length = 3;
-		urb->iso_frame_desc[i].offset = offs;
-		cp[0] = subs->freqn >> 2;
-		cp[1] = subs->freqn >> 10;
-		cp[2] = subs->freqn >> 18;
-	}
+	urb->iso_frame_desc[0].length = 3;
+	urb->iso_frame_desc[0].offset = 0;
+	cp[0] = subs->freqn >> 2;
+	cp[1] = subs->freqn >> 10;
+	cp[2] = subs->freqn >> 18;
 	return 0;
 }
 
@@ -271,24 +269,20 @@ static int prepare_capture_sync_urb(snd_usb_substream_t *subs,
  * fill the length and offset of each urb descriptor.
  * the fixed 12.13 frequency is passed as 16.16 through the pipe.
  */
-static int prepare_capture_sync_urb_hs(snd_usb_substream_t *subs,
-				       snd_pcm_runtime_t *runtime,
+static int prepare_capture_sync_urb_hs(struct snd_usb_substream *subs,
+				       struct snd_pcm_runtime *runtime,
 				       struct urb *urb)
 {
 	unsigned char *cp = urb->transfer_buffer;
-	snd_urb_ctx_t *ctx = (snd_urb_ctx_t *)urb->context;
-	int i, offs;
+	struct snd_urb_ctx *ctx = (struct snd_urb_ctx *)urb->context;
 
-	urb->number_of_packets = ctx->packets;
 	urb->dev = ctx->subs->dev; /* we need to set this at each time */
-	for (i = offs = 0; i < urb->number_of_packets; i++, offs += 4, cp += 4) {
-		urb->iso_frame_desc[i].length = 4;
-		urb->iso_frame_desc[i].offset = offs;
-		cp[0] = subs->freqn;
-		cp[1] = subs->freqn >> 8;
-		cp[2] = subs->freqn >> 16;
-		cp[3] = subs->freqn >> 24;
-	}
+	urb->iso_frame_desc[0].length = 4;
+	urb->iso_frame_desc[0].offset = 0;
+	cp[0] = subs->freqn;
+	cp[1] = subs->freqn >> 8;
+	cp[2] = subs->freqn >> 16;
+	cp[3] = subs->freqn >> 24;
 	return 0;
 }
 
@@ -296,8 +290,8 @@ static int prepare_capture_sync_urb_hs(snd_usb_substream_t *subs,
  * process after capture sync complete
  * - nothing to do
  */
-static int retire_capture_sync_urb(snd_usb_substream_t *subs,
-				   snd_pcm_runtime_t *runtime,
+static int retire_capture_sync_urb(struct snd_usb_substream *subs,
+				   struct snd_pcm_runtime *runtime,
 				   struct urb *urb)
 {
 	return 0;
@@ -313,32 +307,22 @@ static int retire_capture_sync_urb(snd_usb_substream_t *subs,
  * write onto the pcm buffer directly...  the data is thus copied
  * later at complete callback to the global buffer.
  */
-static int prepare_capture_urb(snd_usb_substream_t *subs,
-			       snd_pcm_runtime_t *runtime,
+static int prepare_capture_urb(struct snd_usb_substream *subs,
+			       struct snd_pcm_runtime *runtime,
 			       struct urb *urb)
 {
 	int i, offs;
-	unsigned long flags;
-	snd_urb_ctx_t *ctx = (snd_urb_ctx_t *)urb->context;
+	struct snd_urb_ctx *ctx = (struct snd_urb_ctx *)urb->context;
 
 	offs = 0;
 	urb->dev = ctx->subs->dev; /* we need to set this at each time */
-	urb->number_of_packets = 0;
-	spin_lock_irqsave(&subs->lock, flags);
 	for (i = 0; i < ctx->packets; i++) {
 		urb->iso_frame_desc[i].offset = offs;
 		urb->iso_frame_desc[i].length = subs->curpacksize;
 		offs += subs->curpacksize;
-		urb->number_of_packets++;
-		subs->transfer_sched += subs->curframesize;
-		if (subs->transfer_sched >= runtime->period_size) {
-			subs->transfer_sched -= runtime->period_size;
-			break;
-		}
 	}
-	spin_unlock_irqrestore(&subs->lock, flags);
-	urb->transfer_buffer = ctx->buf;
 	urb->transfer_buffer_length = offs;
+	urb->number_of_packets = ctx->packets;
 #if 0 // for check
 	if (! urb->bandwidth) {
 		int bustime;
@@ -358,14 +342,15 @@ static int prepare_capture_urb(snd_usb_substream_t *subs,
  * copy the data from each desctiptor to the pcm buffer, and
  * update the current position.
  */
-static int retire_capture_urb(snd_usb_substream_t *subs,
-			      snd_pcm_runtime_t *runtime,
+static int retire_capture_urb(struct snd_usb_substream *subs,
+			      struct snd_pcm_runtime *runtime,
 			      struct urb *urb)
 {
 	unsigned long flags;
 	unsigned char *cp;
 	int i;
 	unsigned int stride, len, oldptr;
+	int period_elapsed = 0;
 
 	stride = runtime->frame_bits >> 3;
 
@@ -385,6 +370,10 @@ static int retire_capture_urb(snd_usb_substream_t *subs,
 		if (subs->hwptr_done >= runtime->buffer_size)
 			subs->hwptr_done -= runtime->buffer_size;
 		subs->transfer_done += len;
+		if (subs->transfer_done >= runtime->period_size) {
+			subs->transfer_done -= runtime->period_size;
+			period_elapsed = 1;
+		}
 		spin_unlock_irqrestore(&subs->lock, flags);
 		/* copy a data chunk */
 		if (oldptr + len > runtime->buffer_size) {
@@ -395,15 +384,9 @@ static int retire_capture_urb(snd_usb_substream_t *subs,
 		} else {
 			memcpy(runtime->dma_area + oldptr * stride, cp, len * stride);
 		}
-		/* update the pointer, call callback if necessary */
-		spin_lock_irqsave(&subs->lock, flags);
-		if (subs->transfer_done >= runtime->period_size) {
-			subs->transfer_done -= runtime->period_size;
-			spin_unlock_irqrestore(&subs->lock, flags);
-			snd_pcm_period_elapsed(subs->pcm_substream);
-		} else
-			spin_unlock_irqrestore(&subs->lock, flags);
 	}
+	if (period_elapsed)
+		snd_pcm_period_elapsed(subs->pcm_substream);
 	return 0;
 }
 
@@ -414,19 +397,15 @@ static int retire_capture_urb(snd_usb_substream_t *subs,
  * set up the offset and length to receive the current frequency.
  */
 
-static int prepare_playback_sync_urb(snd_usb_substream_t *subs,
-				     snd_pcm_runtime_t *runtime,
+static int prepare_playback_sync_urb(struct snd_usb_substream *subs,
+				     struct snd_pcm_runtime *runtime,
 				     struct urb *urb)
 {
-	int i, offs;
-	snd_urb_ctx_t *ctx = (snd_urb_ctx_t *)urb->context;
+	struct snd_urb_ctx *ctx = (struct snd_urb_ctx *)urb->context;
 
-	urb->number_of_packets = ctx->packets;
 	urb->dev = ctx->subs->dev; /* we need to set this at each time */
-	for (i = offs = 0; i < urb->number_of_packets; i++, offs += 4) {
-		urb->iso_frame_desc[i].length = 3;
-		urb->iso_frame_desc[i].offset = offs;
-	}
+	urb->iso_frame_desc[0].length = 3;
+	urb->iso_frame_desc[0].offset = 0;
 	return 0;
 }
 
@@ -436,19 +415,15 @@ static int prepare_playback_sync_urb(snd_usb_substream_t *subs,
  * set up the offset and length to receive the current frequency.
  */
 
-static int prepare_playback_sync_urb_hs(snd_usb_substream_t *subs,
-					snd_pcm_runtime_t *runtime,
+static int prepare_playback_sync_urb_hs(struct snd_usb_substream *subs,
+					struct snd_pcm_runtime *runtime,
 					struct urb *urb)
 {
-	int i, offs;
-	snd_urb_ctx_t *ctx = (snd_urb_ctx_t *)urb->context;
+	struct snd_urb_ctx *ctx = (struct snd_urb_ctx *)urb->context;
 
-	urb->number_of_packets = ctx->packets;
 	urb->dev = ctx->subs->dev; /* we need to set this at each time */
-	for (i = offs = 0; i < urb->number_of_packets; i++, offs += 4) {
-		urb->iso_frame_desc[i].length = 4;
-		urb->iso_frame_desc[i].offset = offs;
-	}
+	urb->iso_frame_desc[0].length = 4;
+	urb->iso_frame_desc[0].offset = 0;
 	return 0;
 }
 
@@ -458,35 +433,21 @@ static int prepare_playback_sync_urb_hs(snd_usb_substream_t *subs,
  * retrieve the current 10.14 frequency from pipe, and set it.
  * the value is referred in prepare_playback_urb().
  */
-static int retire_playback_sync_urb(snd_usb_substream_t *subs,
-				    snd_pcm_runtime_t *runtime,
+static int retire_playback_sync_urb(struct snd_usb_substream *subs,
+				    struct snd_pcm_runtime *runtime,
 				    struct urb *urb)
 {
-	int i;
-	unsigned int f, found;
-	unsigned char *cp = urb->transfer_buffer;
+	unsigned int f;
 	unsigned long flags;
 
-	found = 0;
-	for (i = 0; i < urb->number_of_packets; i++, cp += 4) {
-		if (urb->iso_frame_desc[i].status ||
-		    urb->iso_frame_desc[i].actual_length < 3)
-			continue;
-		f = combine_triple(cp) << 2;
-#if 0
-		if (f < subs->freqn - (subs->freqn>>3) || f > subs->freqmax) {
-			snd_printd(KERN_WARNING "requested frequency %d (%u,%03uHz) out of range (current nominal %d (%u,%03uHz))\n",
-				   f, f >> 14, (f & ((1 << 14) - 1) * 1000) / ((1 << 14) - 1),
-				   subs->freqn, subs->freqn >> 14, (subs->freqn & ((1 << 14) - 1) * 1000) / ((1 << 14) - 1));
-			continue;
+	if (urb->iso_frame_desc[0].status == 0 &&
+	    urb->iso_frame_desc[0].actual_length == 3) {
+		f = combine_triple((u8*)urb->transfer_buffer) << 2;
+		if (f >= subs->freqn - subs->freqn / 8 && f <= subs->freqmax) {
+			spin_lock_irqsave(&subs->lock, flags);
+			subs->freqm = f;
+			spin_unlock_irqrestore(&subs->lock, flags);
 		}
-#endif
-		found = f;
-	}
-	if (found) {
-		spin_lock_irqsave(&subs->lock, flags);
-		subs->freqm = found;
-		spin_unlock_irqrestore(&subs->lock, flags);
 	}
 
 	return 0;
@@ -498,49 +459,84 @@ static int retire_playback_sync_urb(snd_usb_substream_t *subs,
  * retrieve the current 12.13 frequency from pipe, and set it.
  * the value is referred in prepare_playback_urb().
  */
-static int retire_playback_sync_urb_hs(snd_usb_substream_t *subs,
-				       snd_pcm_runtime_t *runtime,
+static int retire_playback_sync_urb_hs(struct snd_usb_substream *subs,
+				       struct snd_pcm_runtime *runtime,
 				       struct urb *urb)
 {
-	int i;
-	unsigned int found;
-	unsigned char *cp = urb->transfer_buffer;
+	unsigned int f;
 	unsigned long flags;
 
-	found = 0;
-	for (i = 0; i < urb->number_of_packets; i++, cp += 4) {
-		if (urb->iso_frame_desc[i].status ||
-		    urb->iso_frame_desc[i].actual_length < 4)
-			continue;
-		found = combine_quad(cp) & 0x0fffffff;
+	if (urb->iso_frame_desc[0].status == 0 &&
+	    urb->iso_frame_desc[0].actual_length == 4) {
+		f = combine_quad((u8*)urb->transfer_buffer) & 0x0fffffff;
+		if (f >= subs->freqn - subs->freqn / 8 && f <= subs->freqmax) {
+			spin_lock_irqsave(&subs->lock, flags);
+			subs->freqm = f;
+			spin_unlock_irqrestore(&subs->lock, flags);
+		}
 	}
-	if (found) {
-		spin_lock_irqsave(&subs->lock, flags);
-		subs->freqm = found;
-		spin_unlock_irqrestore(&subs->lock, flags);
+
+	return 0;
+}
+
+/* determine the number of frames in the next packet */
+static int snd_usb_audio_next_packet_size(struct snd_usb_substream *subs)
+{
+	if (subs->fill_max)
+		return subs->maxframesize;
+	else {
+		subs->phase = (subs->phase & 0xffff)
+			+ (subs->freqm << subs->datainterval);
+		return min(subs->phase >> 16, subs->maxframesize);
 	}
+}
+
+/*
+ * Prepare urb for streaming before playback starts.
+ *
+ * We don't yet have data, so we send a frame of silence.
+ */
+static int prepare_startup_playback_urb(struct snd_usb_substream *subs,
+					struct snd_pcm_runtime *runtime,
+					struct urb *urb)
+{
+	unsigned int i, offs, counts;
+	struct snd_urb_ctx *ctx = urb->context;
+	int stride = runtime->frame_bits >> 3;
 
+	offs = 0;
+	urb->dev = ctx->subs->dev;
+	urb->number_of_packets = subs->packs_per_ms;
+	for (i = 0; i < subs->packs_per_ms; ++i) {
+		counts = snd_usb_audio_next_packet_size(subs);
+		urb->iso_frame_desc[i].offset = offs * stride;
+		urb->iso_frame_desc[i].length = counts * stride;
+		offs += counts;
+	}
+	urb->transfer_buffer_length = offs * stride;
+	memset(urb->transfer_buffer,
+	       subs->cur_audiofmt->format == SNDRV_PCM_FORMAT_U8 ? 0x80 : 0,
+	       offs * stride);
 	return 0;
 }
 
 /*
  * prepare urb for playback data pipe
  *
- * we copy the data directly from the pcm buffer.
- * the current position to be copied is held in hwptr field.
- * since a urb can handle only a single linear buffer, if the total
- * transferred area overflows the buffer boundary, we cannot send
- * it directly from the buffer.  thus the data is once copied to
- * a temporary buffer and urb points to that.
- */
-static int prepare_playback_urb(snd_usb_substream_t *subs,
-				snd_pcm_runtime_t *runtime,
+ * Since a URB can handle only a single linear buffer, we must use double
+ * buffering when the data to be transferred overflows the buffer boundary.
+ * To avoid inconsistencies when updating hwptr_done, we use double buffering
+ * for all URBs.
+ */
+static int prepare_playback_urb(struct snd_usb_substream *subs,
+				struct snd_pcm_runtime *runtime,
 				struct urb *urb)
 {
 	int i, stride, offs;
 	unsigned int counts;
 	unsigned long flags;
-	snd_urb_ctx_t *ctx = (snd_urb_ctx_t *)urb->context;
+	int period_elapsed = 0;
+	struct snd_urb_ctx *ctx = (struct snd_urb_ctx *)urb->context;
 
 	stride = runtime->frame_bits >> 3;
 
@@ -549,89 +545,74 @@ static int prepare_playback_urb(snd_usb_substream_t *subs,
 	urb->number_of_packets = 0;
 	spin_lock_irqsave(&subs->lock, flags);
 	for (i = 0; i < ctx->packets; i++) {
-		/* calculate the size of a packet */
-		if (subs->fill_max)
-			counts = subs->maxframesize; /* fixed */
-		else {
-			subs->phase = (subs->phase & 0xffff) + subs->freqm;
-			counts = subs->phase >> 16;
-			if (counts > subs->maxframesize)
-				counts = subs->maxframesize;
-		}
+		counts = snd_usb_audio_next_packet_size(subs);
 		/* set up descriptor */
 		urb->iso_frame_desc[i].offset = offs * stride;
 		urb->iso_frame_desc[i].length = counts * stride;
 		offs += counts;
 		urb->number_of_packets++;
-		subs->transfer_sched += counts;
-		if (subs->transfer_sched >= runtime->period_size) {
-			subs->transfer_sched -= runtime->period_size;
+		subs->transfer_done += counts;
+		if (subs->transfer_done >= runtime->period_size) {
+			subs->transfer_done -= runtime->period_size;
+			period_elapsed = 1;
 			if (subs->fmt_type == USB_FORMAT_TYPE_II) {
-				if (subs->transfer_sched > 0) {
-					/* FIXME: fill-max mode is not supported yet */
-					offs -= subs->transfer_sched;
-					counts -= subs->transfer_sched;
-					urb->iso_frame_desc[i].length = counts * stride;
-					subs->transfer_sched = 0;
+				if (subs->transfer_done > 0) {
+					/* FIXME: fill-max mode is not
+					 * supported yet */
+					offs -= subs->transfer_done;
+					counts -= subs->transfer_done;
+					urb->iso_frame_desc[i].length =
+						counts * stride;
+					subs->transfer_done = 0;
 				}
 				i++;
 				if (i < ctx->packets) {
 					/* add a transfer delimiter */
-					urb->iso_frame_desc[i].offset = offs * stride;
+					urb->iso_frame_desc[i].offset =
+						offs * stride;
 					urb->iso_frame_desc[i].length = 0;
 					urb->number_of_packets++;
 				}
+				break;
 			}
-			break;
  		}
+		/* finish at the frame boundary at/after the period boundary */
+		if (period_elapsed &&
+		    (i & (subs->packs_per_ms - 1)) == subs->packs_per_ms - 1)
+			break;
 	}
-	if (subs->hwptr + offs > runtime->buffer_size) {
-		/* err, the transferred area goes over buffer boundary.
-		 * copy the data to the temp buffer.
-		 */
-		int len;
-		len = runtime->buffer_size - subs->hwptr;
-		urb->transfer_buffer = subs->tmpbuf;
-		memcpy(subs->tmpbuf, runtime->dma_area + subs->hwptr * stride, len * stride);
-		memcpy(subs->tmpbuf + len * stride, runtime->dma_area, (offs - len) * stride);
-		subs->hwptr += offs;
-		subs->hwptr -= runtime->buffer_size;
+	if (subs->hwptr_done + offs > runtime->buffer_size) {
+		/* err, the transferred area goes over buffer boundary. */
+		unsigned int len = runtime->buffer_size - subs->hwptr_done;
+		memcpy(urb->transfer_buffer,
+		       runtime->dma_area + subs->hwptr_done * stride,
+		       len * stride);
+		memcpy(urb->transfer_buffer + len * stride,
+		       runtime->dma_area,
+		       (offs - len) * stride);
 	} else {
-		/* set the buffer pointer */
-		urb->transfer_buffer = runtime->dma_area + subs->hwptr * stride;
-		subs->hwptr += offs;
+		memcpy(urb->transfer_buffer,
+		       runtime->dma_area + subs->hwptr_done * stride,
+		       offs * stride);
 	}
+	subs->hwptr_done += offs;
+	if (subs->hwptr_done >= runtime->buffer_size)
+		subs->hwptr_done -= runtime->buffer_size;
 	spin_unlock_irqrestore(&subs->lock, flags);
 	urb->transfer_buffer_length = offs * stride;
-	ctx->transfer = offs;
-
+	if (period_elapsed)
+		snd_pcm_period_elapsed(subs->pcm_substream);
 	return 0;
 }
 
 /*
  * process after playback data complete
- *
- * update the current position and call callback if a period is processed.
+ * - nothing to do
  */
-static int retire_playback_urb(snd_usb_substream_t *subs,
-			       snd_pcm_runtime_t *runtime,
+static int retire_playback_urb(struct snd_usb_substream *subs,
+			       struct snd_pcm_runtime *runtime,
 			       struct urb *urb)
 {
-	unsigned long flags;
-	snd_urb_ctx_t *ctx = (snd_urb_ctx_t *)urb->context;
-
-	spin_lock_irqsave(&subs->lock, flags);
-	subs->transfer_done += ctx->transfer;
-	subs->hwptr_done += ctx->transfer;
-	ctx->transfer = 0;
-	if (subs->hwptr_done >= runtime->buffer_size)
-		subs->hwptr_done -= runtime->buffer_size;
-	if (subs->transfer_done >= runtime->period_size) {
-		subs->transfer_done -= runtime->period_size;
-		spin_unlock_irqrestore(&subs->lock, flags);
-		snd_pcm_period_elapsed(subs->pcm_substream);
-	} else
-		spin_unlock_irqrestore(&subs->lock, flags);
 	return 0;
 }
 
@@ -640,7 +621,7 @@ static int retire_playback_urb(snd_usb_substream_t *subs,
  */
 static struct snd_urb_ops audio_urb_ops[2] = {
 	{
-		.prepare =	prepare_playback_urb,
+		.prepare =	prepare_startup_playback_urb,
 		.retire =	retire_playback_urb,
 		.prepare_sync =	prepare_playback_sync_urb,
 		.retire_sync =	retire_playback_sync_urb,
@@ -655,7 +636,7 @@ static struct snd_urb_ops audio_urb_ops[2] = {
 
 static struct snd_urb_ops audio_urb_ops_high_speed[2] = {
 	{
-		.prepare =	prepare_playback_urb,
+		.prepare =	prepare_startup_playback_urb,
 		.retire =	retire_playback_urb,
 		.prepare_sync =	prepare_playback_sync_urb_hs,
 		.retire_sync =	retire_playback_sync_urb_hs,
@@ -673,9 +654,9 @@ static struct snd_urb_ops audio_urb_ops_high_speed[2] = {
  */
 static void snd_complete_urb(struct urb *urb, struct pt_regs *regs)
 {
-	snd_urb_ctx_t *ctx = (snd_urb_ctx_t *)urb->context;
-	snd_usb_substream_t *subs = ctx->subs;
-	snd_pcm_substream_t *substream = ctx->subs->pcm_substream;
+	struct snd_urb_ctx *ctx = (struct snd_urb_ctx *)urb->context;
+	struct snd_usb_substream *subs = ctx->subs;
+	struct snd_pcm_substream *substream = ctx->subs->pcm_substream;
 	int err = 0;
 
 	if ((subs->running && subs->ops.retire(subs, substream->runtime, urb)) ||
@@ -696,9 +677,9 @@ static void snd_complete_urb(struct urb *urb, struct pt_regs *regs)
  */
 static void snd_complete_sync_urb(struct urb *urb, struct pt_regs *regs)
 {
-	snd_urb_ctx_t *ctx = (snd_urb_ctx_t *)urb->context;
-	snd_usb_substream_t *subs = ctx->subs;
-	snd_pcm_substream_t *substream = ctx->subs->pcm_substream;
+	struct snd_urb_ctx *ctx = (struct snd_urb_ctx *)urb->context;
+	struct snd_usb_substream *subs = ctx->subs;
+	struct snd_pcm_substream *substream = ctx->subs->pcm_substream;
 	int err = 0;
 
 	if ((subs->running && subs->ops.retire_sync(subs, substream->runtime, urb)) ||
@@ -714,10 +695,45 @@ static void snd_complete_sync_urb(struct urb *urb, struct pt_regs *regs)
 }
 
 
+/* get the physical page pointer at the given offset */
+static struct page *snd_pcm_get_vmalloc_page(struct snd_pcm_substream *subs,
+					     unsigned long offset)
+{
+	void *pageptr = subs->runtime->dma_area + offset;
+	return vmalloc_to_page(pageptr);
+}
+
+/* allocate virtual buffer; may be called more than once */
+static int snd_pcm_alloc_vmalloc_buffer(struct snd_pcm_substream *subs, size_t size)
+{
+	struct snd_pcm_runtime *runtime = subs->runtime;
+	if (runtime->dma_area) {
+		if (runtime->dma_bytes >= size)
+			return 0; /* already large enough */
+		vfree(runtime->dma_area);
+	}
+	runtime->dma_area = vmalloc(size);
+	if (! runtime->dma_area)
+		return -ENOMEM;
+	runtime->dma_bytes = size;
+	return 0;
+}
+
+/* free virtual buffer; may be called more than once */
+static int snd_pcm_free_vmalloc_buffer(struct snd_pcm_substream *subs)
+{
+	struct snd_pcm_runtime *runtime = subs->runtime;
+
+	vfree(runtime->dma_area);
+	runtime->dma_area = NULL;
+	return 0;
+}
+
+
 /*
  * unlink active urbs.
  */
-static int deactivate_urbs(snd_usb_substream_t *subs, int force, int can_sleep)
+static int deactivate_urbs(struct snd_usb_substream *subs, int force, int can_sleep)
 {
 	unsigned int i;
 	int async;
@@ -736,10 +752,9 @@ static int deactivate_urbs(snd_usb_substream_t *subs, int force, int can_sleep)
 		if (test_bit(i, &subs->active_mask)) {
 			if (! test_and_set_bit(i, &subs->unlink_mask)) {
 				struct urb *u = subs->dataurb[i].urb;
-				if (async) {
-					u->transfer_flags |= URB_ASYNC_UNLINK;
+				if (async)
 					usb_unlink_urb(u);
-				} else
+				else
 					usb_kill_urb(u);
 			}
 		}
@@ -749,10 +764,9 @@ static int deactivate_urbs(snd_usb_substream_t *subs, int force, int can_sleep)
 			if (test_bit(i+16, &subs->active_mask)) {
  				if (! test_and_set_bit(i+16, &subs->unlink_mask)) {
 					struct urb *u = subs->syncurb[i].urb;
-					if (async) {
-						u->transfer_flags |= URB_ASYNC_UNLINK;
+					if (async)
 						usb_unlink_urb(u);
-					} else
+					else
 						usb_kill_urb(u);
 				}
 			}
@@ -762,10 +776,39 @@ static int deactivate_urbs(snd_usb_substream_t *subs, int force, int can_sleep)
 }
 
 
+static const char *usb_error_string(int err)
+{
+	switch (err) {
+	case -ENODEV:
+		return "no device";
+	case -ENOENT:
+		return "endpoint not enabled";
+	case -EPIPE:
+		return "endpoint stalled";
+	case -ENOSPC:
+		return "not enough bandwidth";
+	case -ESHUTDOWN:
+		return "device disabled";
+	case -EHOSTUNREACH:
+		return "device suspended";
+#ifndef CONFIG_USB_EHCI_SPLIT_ISO
+	case -ENOSYS:
+		return "enable CONFIG_USB_EHCI_SPLIT_ISO to play through a hub";
+#endif
+	case -EINVAL:
+	case -EAGAIN:
+	case -EFBIG:
+	case -EMSGSIZE:
+		return "internal error";
+	default:
+		return "unknown error";
+	}
+}
+
 /*
  * set up and start data/sync urbs
  */
-static int start_urbs(snd_usb_substream_t *subs, snd_pcm_runtime_t *runtime)
+static int start_urbs(struct snd_usb_substream *subs, struct snd_pcm_runtime *runtime)
 {
 	unsigned int i;
 	int err;
@@ -794,16 +837,22 @@ static int start_urbs(snd_usb_substream_t *subs, snd_pcm_runtime_t *runtime)
 	subs->unlink_mask = 0;
 	subs->running = 1;
 	for (i = 0; i < subs->nurbs; i++) {
-		if ((err = usb_submit_urb(subs->dataurb[i].urb, GFP_ATOMIC)) < 0) {
-			snd_printk(KERN_ERR "cannot submit datapipe for urb %d, err = %d\n", i, err);
+		err = usb_submit_urb(subs->dataurb[i].urb, GFP_ATOMIC);
+		if (err < 0) {
+			snd_printk(KERN_ERR "cannot submit datapipe "
+				   "for urb %d, error %d: %s\n",
+				   i, err, usb_error_string(err));
 			goto __error;
 		}
 		set_bit(i, &subs->active_mask);
 	}
 	if (subs->syncpipe) {
 		for (i = 0; i < SYNC_URBS; i++) {
-			if ((err = usb_submit_urb(subs->syncurb[i].urb, GFP_ATOMIC)) < 0) {
-				snd_printk(KERN_ERR "cannot submit syncpipe for urb %d, err = %d\n", i, err);
+			err = usb_submit_urb(subs->syncurb[i].urb, GFP_ATOMIC);
+			if (err < 0) {
+				snd_printk(KERN_ERR "cannot submit syncpipe "
+					   "for urb %d, error %d: %s\n",
+					   i, err, usb_error_string(err));
 				goto __error;
 			}
 			set_bit(i + 16, &subs->active_mask);
@@ -821,9 +870,9 @@ static int start_urbs(snd_usb_substream_t *subs, snd_pcm_runtime_t *runtime)
 /*
  *  wait until all urbs are processed.
  */
-static int wait_clear_urbs(snd_usb_substream_t *subs)
+static int wait_clear_urbs(struct snd_usb_substream *subs)
 {
-	int timeout = HZ;
+	unsigned long end_time = jiffies + msecs_to_jiffies(1000);
 	unsigned int i;
 	int alive;
 
@@ -841,9 +890,8 @@ static int wait_clear_urbs(snd_usb_substream_t *subs)
 		}
 		if (! alive)
 			break;
-		set_current_state(TASK_UNINTERRUPTIBLE);
-		schedule_timeout(1);
-	} while (--timeout > 0);
+		schedule_timeout_uninterruptible(1);
+	} while (time_before(jiffies, end_time));
 	if (alive)
 		snd_printk(KERN_ERR "timeout: still %d active urbs..\n", alive);
 	return 0;
@@ -853,55 +901,76 @@ static int wait_clear_urbs(snd_usb_substream_t *subs)
 /*
  * return the current pcm pointer.  just return the hwptr_done value.
  */
-static snd_pcm_uframes_t snd_usb_pcm_pointer(snd_pcm_substream_t *substream)
+static snd_pcm_uframes_t snd_usb_pcm_pointer(struct snd_pcm_substream *substream)
 {
-	snd_usb_substream_t *subs = (snd_usb_substream_t *)substream->runtime->private_data;
-	return subs->hwptr_done;
+	struct snd_usb_substream *subs;
+	snd_pcm_uframes_t hwptr_done;
+	
+	subs = (struct snd_usb_substream *)substream->runtime->private_data;
+	spin_lock(&subs->lock);
+	hwptr_done = subs->hwptr_done;
+	spin_unlock(&subs->lock);
+	return hwptr_done;
 }
 
 
 /*
- * start/stop substream
+ * start/stop playback substream
  */
-static int snd_usb_pcm_trigger(snd_pcm_substream_t *substream, int cmd)
+static int snd_usb_pcm_playback_trigger(struct snd_pcm_substream *substream,
+					int cmd)
 {
-	snd_usb_substream_t *subs = (snd_usb_substream_t *)substream->runtime->private_data;
-	int err;
+	struct snd_usb_substream *subs = substream->runtime->private_data;
 
 	switch (cmd) {
 	case SNDRV_PCM_TRIGGER_START:
-		err = start_urbs(subs, substream->runtime);
-		break;
+		subs->ops.prepare = prepare_playback_urb;
+		return 0;
 	case SNDRV_PCM_TRIGGER_STOP:
-		err = deactivate_urbs(subs, 0, 0);
-		break;
+		return deactivate_urbs(subs, 0, 0);
 	default:
-		err = -EINVAL;
-		break;
+		return -EINVAL;
+	}
+}
+
+/*
+ * start/stop capture substream
+ */
+static int snd_usb_pcm_capture_trigger(struct snd_pcm_substream *substream,
+				       int cmd)
+{
+	struct snd_usb_substream *subs = substream->runtime->private_data;
+
+	switch (cmd) {
+	case SNDRV_PCM_TRIGGER_START:
+		return start_urbs(subs, substream->runtime);
+	case SNDRV_PCM_TRIGGER_STOP:
+		return deactivate_urbs(subs, 0, 0);
+	default:
+		return -EINVAL;
 	}
-	return err < 0 ? err : 0;
 }
 
 
 /*
  * release a urb data
  */
-static void release_urb_ctx(snd_urb_ctx_t *u)
+static void release_urb_ctx(struct snd_urb_ctx *u)
 {
 	if (u->urb) {
+		if (u->buffer_size)
+			usb_buffer_free(u->subs->dev, u->buffer_size,
+					u->urb->transfer_buffer,
+					u->urb->transfer_dma);
 		usb_free_urb(u->urb);
 		u->urb = NULL;
 	}
-	if (u->buf) {
-		kfree(u->buf);
-		u->buf = NULL;
-	}
 }
 
 /*
  * release a substream
  */
-static void release_substream_urbs(snd_usb_substream_t *subs, int force)
+static void release_substream_urbs(struct snd_usb_substream *subs, int force)
 {
 	int i;
 
@@ -913,22 +982,21 @@ static void release_substream_urbs(snd_usb_substream_t *subs, int force)
 		release_urb_ctx(&subs->dataurb[i]);
 	for (i = 0; i < SYNC_URBS; i++)
 		release_urb_ctx(&subs->syncurb[i]);
-	if (subs->tmpbuf) {
-		kfree(subs->tmpbuf);
-		subs->tmpbuf = NULL;
-	}
+	usb_buffer_free(subs->dev, SYNC_URBS * 4,
+			subs->syncbuf, subs->sync_dma);
+	subs->syncbuf = NULL;
 	subs->nurbs = 0;
 }
 
 /*
  * initialize a substream for plaback/capture
  */
-static int init_substream_urbs(snd_usb_substream_t *subs, unsigned int period_bytes,
+static int init_substream_urbs(struct snd_usb_substream *subs, unsigned int period_bytes,
 			       unsigned int rate, unsigned int frame_bits)
 {
 	unsigned int maxsize, n, i;
 	int is_playback = subs->direction == SNDRV_PCM_STREAM_PLAYBACK;
-	unsigned int npacks[MAX_URBS], urb_packs, total_packs;
+	unsigned int npacks[MAX_URBS], urb_packs, total_packs, packs_per_ms;
 
 	/* calculate the frequency in 16.16 format */
 	if (snd_usb_get_speed(subs->dev) == USB_SPEED_FULL)
@@ -936,40 +1004,59 @@ static int init_substream_urbs(snd_usb_substream_t *subs, unsigned int period_by
 	else
 		subs->freqn = get_usb_high_speed_rate(rate);
 	subs->freqm = subs->freqn;
-	subs->freqmax = subs->freqn + (subs->freqn >> 2); /* max. allowed frequency */
-	subs->phase = 0;
-
-	/* calculate the max. size of packet */
-	maxsize = ((subs->freqmax + 0xffff) * (frame_bits >> 3)) >> 16;
-	if (subs->maxpacksize && maxsize > subs->maxpacksize) {
-		//snd_printd(KERN_DEBUG "maxsize %d is greater than defined size %d\n",
-		//	   maxsize, subs->maxpacksize);
+	/* calculate max. frequency */
+	if (subs->maxpacksize) {
+		/* whatever fits into a max. size packet */
 		maxsize = subs->maxpacksize;
+		subs->freqmax = (maxsize / (frame_bits >> 3))
+				<< (16 - subs->datainterval);
+	} else {
+		/* no max. packet size: just take 25% higher than nominal */
+		subs->freqmax = subs->freqn + (subs->freqn >> 2);
+		maxsize = ((subs->freqmax + 0xffff) * (frame_bits >> 3))
+				>> (16 - subs->datainterval);
 	}
+	subs->phase = 0;
 
 	if (subs->fill_max)
 		subs->curpacksize = subs->maxpacksize;
 	else
 		subs->curpacksize = maxsize;
 
-	if (snd_usb_get_speed(subs->dev) == USB_SPEED_FULL)
-		urb_packs = nrpacks;
+	if (snd_usb_get_speed(subs->dev) == USB_SPEED_HIGH)
+		packs_per_ms = 8 >> subs->datainterval;
 	else
-		urb_packs = nrpacks * 8;
+		packs_per_ms = 1;
+	subs->packs_per_ms = packs_per_ms;
 
-	/* allocate a temporary buffer for playback */
 	if (is_playback) {
-		subs->tmpbuf = kmalloc(maxsize * urb_packs, GFP_KERNEL);
-		if (! subs->tmpbuf) {
-			snd_printk(KERN_ERR "cannot malloc tmpbuf\n");
-			return -ENOMEM;
-		}
-	}
+		urb_packs = nrpacks;
+		urb_packs = max(urb_packs, (unsigned int)MIN_PACKS_URB);
+		urb_packs = min(urb_packs, (unsigned int)MAX_PACKS);
+	} else
+		urb_packs = 1;
+	urb_packs *= packs_per_ms;
 
 	/* decide how many packets to be used */
-	total_packs = (period_bytes + maxsize - 1) / maxsize;
-	if (total_packs < 2 * MIN_PACKS_URB)
-		total_packs = 2 * MIN_PACKS_URB;
+	if (is_playback) {
+		unsigned int minsize;
+		/* determine how small a packet can be */
+		minsize = (subs->freqn >> (16 - subs->datainterval))
+			  * (frame_bits >> 3);
+		/* with sync from device, assume it can be 12% lower */
+		if (subs->syncpipe)
+			minsize -= minsize >> 3;
+		minsize = max(minsize, 1u);
+		total_packs = (period_bytes + minsize - 1) / minsize;
+		/* round up to multiple of packs_per_ms */
+		total_packs = (total_packs + packs_per_ms - 1)
+				& ~(packs_per_ms - 1);
+		/* we need at least two URBs for queueing */
+		if (total_packs < 2 * MIN_PACKS_URB * packs_per_ms)
+			total_packs = 2 * MIN_PACKS_URB * packs_per_ms;
+	} else {
+		total_packs = MAX_URBS * urb_packs;
+	}
 	subs->nurbs = (total_packs + urb_packs - 1) / urb_packs;
 	if (subs->nurbs > MAX_URBS) {
 		/* too much... */
@@ -988,7 +1075,7 @@ static int init_substream_urbs(snd_usb_substream_t *subs, unsigned int period_by
 		subs->nurbs = 2;
 		npacks[0] = (total_packs + 1) / 2;
 		npacks[1] = total_packs - npacks[0];
-	} else if (npacks[subs->nurbs-1] < MIN_PACKS_URB) {
+	} else if (npacks[subs->nurbs-1] < MIN_PACKS_URB * packs_per_ms) {
 		/* the last packet is too small.. */
 		if (subs->nurbs > 2) {
 			/* merge to the first one */
@@ -1004,69 +1091,66 @@ static int init_substream_urbs(snd_usb_substream_t *subs, unsigned int period_by
 
 	/* allocate and initialize data urbs */
 	for (i = 0; i < subs->nurbs; i++) {
-		snd_urb_ctx_t *u = &subs->dataurb[i];
+		struct snd_urb_ctx *u = &subs->dataurb[i];
 		u->index = i;
 		u->subs = subs;
-		u->transfer = 0;
 		u->packets = npacks[i];
+		u->buffer_size = maxsize * u->packets;
 		if (subs->fmt_type == USB_FORMAT_TYPE_II)
 			u->packets++; /* for transfer delimiter */
-		if (! is_playback) {
-			/* allocate a capture buffer per urb */
-			u->buf = kmalloc(maxsize * u->packets, GFP_KERNEL);
-			if (! u->buf) {
-				release_substream_urbs(subs, 0);
-				return -ENOMEM;
-			}
-		}
 		u->urb = usb_alloc_urb(u->packets, GFP_KERNEL);
-		if (! u->urb) {
-			release_substream_urbs(subs, 0);
-			return -ENOMEM;
-		}
-		u->urb->dev = subs->dev;
+		if (! u->urb)
+			goto out_of_memory;
+		u->urb->transfer_buffer =
+			usb_buffer_alloc(subs->dev, u->buffer_size, GFP_KERNEL,
+					 &u->urb->transfer_dma);
+		if (! u->urb->transfer_buffer)
+			goto out_of_memory;
 		u->urb->pipe = subs->datapipe;
-		u->urb->transfer_flags = URB_ISO_ASAP;
-		u->urb->number_of_packets = u->packets;
-		u->urb->interval = 1;
+		u->urb->transfer_flags = URB_ISO_ASAP | URB_NO_TRANSFER_DMA_MAP;
+		u->urb->interval = 1 << subs->datainterval;
 		u->urb->context = u;
-		u->urb->complete = snd_usb_complete_callback(snd_complete_urb);
+		u->urb->complete = snd_complete_urb;
 	}
 
 	if (subs->syncpipe) {
 		/* allocate and initialize sync urbs */
+		subs->syncbuf = usb_buffer_alloc(subs->dev, SYNC_URBS * 4,
+						 GFP_KERNEL, &subs->sync_dma);
+		if (! subs->syncbuf)
+			goto out_of_memory;
 		for (i = 0; i < SYNC_URBS; i++) {
-			snd_urb_ctx_t *u = &subs->syncurb[i];
+			struct snd_urb_ctx *u = &subs->syncurb[i];
 			u->index = i;
 			u->subs = subs;
-			u->packets = nrpacks;
-			u->urb = usb_alloc_urb(u->packets, GFP_KERNEL);
-			if (! u->urb) {
-				release_substream_urbs(subs, 0);
-				return -ENOMEM;
-			}
-			u->urb->transfer_buffer = subs->syncbuf + i * nrpacks * 4;
-			u->urb->transfer_buffer_length = nrpacks * 4;
-			u->urb->dev = subs->dev;
+			u->packets = 1;
+			u->urb = usb_alloc_urb(1, GFP_KERNEL);
+			if (! u->urb)
+				goto out_of_memory;
+			u->urb->transfer_buffer = subs->syncbuf + i * 4;
+			u->urb->transfer_dma = subs->sync_dma + i * 4;
+			u->urb->transfer_buffer_length = 4;
 			u->urb->pipe = subs->syncpipe;
-			u->urb->transfer_flags = URB_ISO_ASAP;
-			u->urb->number_of_packets = u->packets;
-			if (snd_usb_get_speed(subs->dev) == USB_SPEED_HIGH)
-				u->urb->interval = 8;
-			else
-				u->urb->interval = 1;
+			u->urb->transfer_flags = URB_ISO_ASAP |
+						 URB_NO_TRANSFER_DMA_MAP;
+			u->urb->number_of_packets = 1;
+			u->urb->interval = 1 << subs->syncinterval;
 			u->urb->context = u;
-			u->urb->complete = snd_usb_complete_callback(snd_complete_sync_urb);
+			u->urb->complete = snd_complete_sync_urb;
 		}
 	}
 	return 0;
+
+out_of_memory:
+	release_substream_urbs(subs, 0);
+	return -ENOMEM;
 }
 
 
 /*
  * find a matching audio format
  */
-static struct audioformat *find_format(snd_usb_substream_t *subs, unsigned int format,
+static struct audioformat *find_format(struct snd_usb_substream *subs, unsigned int format,
 				       unsigned int rate, unsigned int channels)
 {
 	struct list_head *p;
@@ -1191,7 +1275,7 @@ static int init_usb_sample_rate(struct usb_device *dev, int iface,
 /*
  * find a matching format and set up the interface
  */
-static int set_format(snd_usb_substream_t *subs, struct audioformat *fmt)
+static int set_format(struct snd_usb_substream *subs, struct audioformat *fmt)
 {
 	struct usb_device *dev = subs->dev;
 	struct usb_host_interface *alts;
@@ -1235,6 +1319,12 @@ static int set_format(snd_usb_substream_t *subs, struct audioformat *fmt)
 		subs->datapipe = usb_sndisocpipe(dev, ep);
 	else
 		subs->datapipe = usb_rcvisocpipe(dev, ep);
+	if (snd_usb_get_speed(subs->dev) == USB_SPEED_HIGH &&
+	    get_endpoint(alts, 0)->bInterval >= 1 &&
+	    get_endpoint(alts, 0)->bInterval <= 4)
+		subs->datainterval = get_endpoint(alts, 0)->bInterval - 1;
+	else
+		subs->datainterval = 0;
 	subs->syncpipe = subs->syncinterval = 0;
 	subs->maxpacksize = fmt->maxpacksize;
 	subs->fill_max = 0;
@@ -1272,7 +1362,17 @@ static int set_format(snd_usb_substream_t *subs, struct audioformat *fmt)
 			subs->syncpipe = usb_rcvisocpipe(dev, ep);
 		else
 			subs->syncpipe = usb_sndisocpipe(dev, ep);
-		subs->syncinterval = get_endpoint(alts, 1)->bRefresh;
+		if (get_endpoint(alts, 1)->bLength >= USB_DT_ENDPOINT_AUDIO_SIZE &&
+		    get_endpoint(alts, 1)->bRefresh >= 1 &&
+		    get_endpoint(alts, 1)->bRefresh <= 9)
+			subs->syncinterval = get_endpoint(alts, 1)->bRefresh;
+		else if (snd_usb_get_speed(subs->dev) == USB_SPEED_FULL)
+			subs->syncinterval = 1;
+		else if (get_endpoint(alts, 1)->bInterval >= 1 &&
+			 get_endpoint(alts, 1)->bInterval <= 16)
+			subs->syncinterval = get_endpoint(alts, 1)->bInterval - 1;
+		else
+			subs->syncinterval = 3;
 	}
 
 	/* always fill max packet size */
@@ -1304,15 +1404,16 @@ static int set_format(snd_usb_substream_t *subs, struct audioformat *fmt)
  * if sg buffer is supported on the later version of alsa, we'll follow
  * that.
  */
-static int snd_usb_hw_params(snd_pcm_substream_t *substream,
-			     snd_pcm_hw_params_t *hw_params)
+static int snd_usb_hw_params(struct snd_pcm_substream *substream,
+			     struct snd_pcm_hw_params *hw_params)
 {
-	snd_usb_substream_t *subs = (snd_usb_substream_t *)substream->runtime->private_data;
+	struct snd_usb_substream *subs = (struct snd_usb_substream *)substream->runtime->private_data;
 	struct audioformat *fmt;
 	unsigned int channels, rate, format;
 	int ret, changed;
 
-	ret = snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(hw_params));
+	ret = snd_pcm_alloc_vmalloc_buffer(substream,
+					   params_buffer_bytes(hw_params));
 	if (ret < 0)
 		return ret;
 
@@ -1321,8 +1422,8 @@ static int snd_usb_hw_params(snd_pcm_substream_t *substream,
 	channels = params_channels(hw_params);
 	fmt = find_format(subs, format, rate, channels);
 	if (! fmt) {
-		snd_printd(KERN_DEBUG "cannot set format: format = %s, rate = %d, channels = %d\n",
-			   snd_pcm_format_name(format), rate, channels);
+		snd_printd(KERN_DEBUG "cannot set format: format = 0x%x, rate = %d, channels = %d\n",
+			   format, rate, channels);
 		return -EINVAL;
 	}
 
@@ -1360,15 +1461,15 @@ static int snd_usb_hw_params(snd_pcm_substream_t *substream,
  *
  * reset the audio format and release the buffer
  */
-static int snd_usb_hw_free(snd_pcm_substream_t *substream)
+static int snd_usb_hw_free(struct snd_pcm_substream *substream)
 {
-	snd_usb_substream_t *subs = (snd_usb_substream_t *)substream->runtime->private_data;
+	struct snd_usb_substream *subs = (struct snd_usb_substream *)substream->runtime->private_data;
 
 	subs->cur_audiofmt = NULL;
 	subs->cur_rate = 0;
 	subs->period_bytes = 0;
 	release_substream_urbs(subs, 0);
-	return snd_pcm_lib_free_pages(substream);
+	return snd_pcm_free_vmalloc_buffer(substream);
 }
 
 /*
@@ -1376,10 +1477,10 @@ static int snd_usb_hw_free(snd_pcm_substream_t *substream)
  *
  * only a few subtle things...
  */
-static int snd_usb_pcm_prepare(snd_pcm_substream_t *substream)
+static int snd_usb_pcm_prepare(struct snd_pcm_substream *substream)
 {
-	snd_pcm_runtime_t *runtime = substream->runtime;
-	snd_usb_substream_t *subs = (snd_usb_substream_t *)runtime->private_data;
+	struct snd_pcm_runtime *runtime = substream->runtime;
+	struct snd_usb_substream *subs = runtime->private_data;
 
 	if (! subs->cur_audiofmt) {
 		snd_printk(KERN_ERR "usbaudio: no format is specified!\n");
@@ -1391,9 +1492,7 @@ static int snd_usb_pcm_prepare(snd_pcm_substream_t *substream)
 	subs->curframesize = bytes_to_frames(runtime, subs->curpacksize);
 
 	/* reset the pointer */
-	subs->hwptr = 0;
 	subs->hwptr_done = 0;
-	subs->transfer_sched = 0;
 	subs->transfer_done = 0;
 	subs->phase = 0;
 
@@ -1401,29 +1500,39 @@ static int snd_usb_pcm_prepare(snd_pcm_substream_t *substream)
 	deactivate_urbs(subs, 0, 1);
 	wait_clear_urbs(subs);
 
-	return 0;
+	/* for playback, submit the URBs now; otherwise, the first hwptr_done
+	 * updates for all URBs would happen at the same time when starting */
+	if (subs->direction == SNDRV_PCM_STREAM_PLAYBACK) {
+		subs->ops.prepare = prepare_startup_playback_urb;
+		return start_urbs(subs, runtime);
+	} else
+		return 0;
 }
 
-static snd_pcm_hardware_t snd_usb_playback =
+static struct snd_pcm_hardware snd_usb_playback =
 {
-	.info =			(SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
-				 SNDRV_PCM_INFO_BLOCK_TRANSFER |
-				 SNDRV_PCM_INFO_MMAP_VALID),
-	.buffer_bytes_max =	(128*1024),
+	.info =			SNDRV_PCM_INFO_MMAP |
+				SNDRV_PCM_INFO_MMAP_VALID |
+				SNDRV_PCM_INFO_BATCH |
+				SNDRV_PCM_INFO_INTERLEAVED |
+				SNDRV_PCM_INFO_BLOCK_TRANSFER,
+	.buffer_bytes_max =	1024 * 1024,
 	.period_bytes_min =	64,
-	.period_bytes_max =	(128*1024),
+	.period_bytes_max =	512 * 1024,
 	.periods_min =		2,
 	.periods_max =		1024,
 };
 
-static snd_pcm_hardware_t snd_usb_capture =
+static struct snd_pcm_hardware snd_usb_capture =
 {
-	.info =			(SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
-				 SNDRV_PCM_INFO_BLOCK_TRANSFER |
-				 SNDRV_PCM_INFO_MMAP_VALID),
-	.buffer_bytes_max =	(128*1024),
+	.info =			SNDRV_PCM_INFO_MMAP |
+				SNDRV_PCM_INFO_MMAP_VALID |
+				SNDRV_PCM_INFO_BATCH |
+				SNDRV_PCM_INFO_INTERLEAVED |
+				SNDRV_PCM_INFO_BLOCK_TRANSFER,
+	.buffer_bytes_max =	1024 * 1024,
 	.period_bytes_min =	64,
-	.period_bytes_max =	(128*1024),
+	.period_bytes_max =	512 * 1024,
 	.periods_min =		2,
 	.periods_max =		1024,
 };
@@ -1438,11 +1547,11 @@ static snd_pcm_hardware_t snd_usb_capture =
 #define hwc_debug(fmt, args...) /**/
 #endif
 
-static int hw_check_valid_format(snd_pcm_hw_params_t *params, struct audioformat *fp)
+static int hw_check_valid_format(struct snd_pcm_hw_params *params, struct audioformat *fp)
 {
-	snd_interval_t *it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
-	snd_interval_t *ct = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
-	snd_mask_t *fmts = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
+	struct snd_interval *it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
+	struct snd_interval *ct = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
+	struct snd_mask *fmts = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
 
 	/* check the format */
 	if (! snd_mask_test(fmts, fp->format)) {
@@ -1466,12 +1575,12 @@ static int hw_check_valid_format(snd_pcm_hw_params_t *params, struct audioformat
 	return 1;
 }
 
-static int hw_rule_rate(snd_pcm_hw_params_t *params,
-			snd_pcm_hw_rule_t *rule)
+static int hw_rule_rate(struct snd_pcm_hw_params *params,
+			struct snd_pcm_hw_rule *rule)
 {
-	snd_usb_substream_t *subs = rule->private;
+	struct snd_usb_substream *subs = rule->private;
 	struct list_head *p;
-	snd_interval_t *it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
+	struct snd_interval *it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
 	unsigned int rmin, rmax;
 	int changed;
 
@@ -1520,12 +1629,12 @@ static int hw_rule_rate(snd_pcm_hw_params_t *params,
 }
 
 
-static int hw_rule_channels(snd_pcm_hw_params_t *params,
-			    snd_pcm_hw_rule_t *rule)
+static int hw_rule_channels(struct snd_pcm_hw_params *params,
+			    struct snd_pcm_hw_rule *rule)
 {
-	snd_usb_substream_t *subs = rule->private;
+	struct snd_usb_substream *subs = rule->private;
 	struct list_head *p;
-	snd_interval_t *it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
+	struct snd_interval *it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
 	unsigned int rmin, rmax;
 	int changed;
 
@@ -1573,12 +1682,12 @@ static int hw_rule_channels(snd_pcm_hw_params_t *params,
 	return changed;
 }
 
-static int hw_rule_format(snd_pcm_hw_params_t *params,
-			  snd_pcm_hw_rule_t *rule)
+static int hw_rule_format(struct snd_pcm_hw_params *params,
+			  struct snd_pcm_hw_rule *rule)
 {
-	snd_usb_substream_t *subs = rule->private;
+	struct snd_usb_substream *subs = rule->private;
 	struct list_head *p;
-	snd_mask_t *fmt = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
+	struct snd_mask *fmt = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
 	u64 fbits;
 	u32 oldbits[2];
 	int changed;
@@ -1611,7 +1720,7 @@ static int hw_rule_format(snd_pcm_hw_params_t *params,
 /*
  * check whether the registered audio formats need special hw-constraints
  */
-static int check_hw_params_convention(snd_usb_substream_t *subs)
+static int check_hw_params_convention(struct snd_usb_substream *subs)
 {
 	int i;
 	u32 *channels;
@@ -1695,7 +1804,7 @@ static int check_hw_params_convention(snd_usb_substream_t *subs)
  * set up the runtime hardware information.
  */
 
-static int setup_hw_info(snd_pcm_runtime_t *runtime, snd_usb_substream_t *subs)
+static int setup_hw_info(struct snd_pcm_runtime *runtime, struct snd_usb_substream *subs)
 {
 	struct list_head *p;
 	int err;
@@ -1756,12 +1865,12 @@ static int setup_hw_info(snd_pcm_runtime_t *runtime, snd_usb_substream_t *subs)
 	return 0;
 }
 
-static int snd_usb_pcm_open(snd_pcm_substream_t *substream, int direction,
-			    snd_pcm_hardware_t *hw)
+static int snd_usb_pcm_open(struct snd_pcm_substream *substream, int direction,
+			    struct snd_pcm_hardware *hw)
 {
-	snd_usb_stream_t *as = snd_pcm_substream_chip(substream);
-	snd_pcm_runtime_t *runtime = substream->runtime;
-	snd_usb_substream_t *subs = &as->substream[direction];
+	struct snd_usb_stream *as = snd_pcm_substream_chip(substream);
+	struct snd_pcm_runtime *runtime = substream->runtime;
+	struct snd_usb_substream *subs = &as->substream[direction];
 
 	subs->interface = -1;
 	subs->format = 0;
@@ -1771,10 +1880,10 @@ static int snd_usb_pcm_open(snd_pcm_substream_t *substream, int direction,
 	return setup_hw_info(runtime, subs);
 }
 
-static int snd_usb_pcm_close(snd_pcm_substream_t *substream, int direction)
+static int snd_usb_pcm_close(struct snd_pcm_substream *substream, int direction)
 {
-	snd_usb_stream_t *as = snd_pcm_substream_chip(substream);
-	snd_usb_substream_t *subs = &as->substream[direction];
+	struct snd_usb_stream *as = snd_pcm_substream_chip(substream);
+	struct snd_usb_substream *subs = &as->substream[direction];
 
 	if (subs->interface >= 0) {
 		usb_set_interface(subs->dev, subs->interface, 0);
@@ -1784,46 +1893,48 @@ static int snd_usb_pcm_close(snd_pcm_substream_t *substream, int direction)
 	return 0;
 }
 
-static int snd_usb_playback_open(snd_pcm_substream_t *substream)
+static int snd_usb_playback_open(struct snd_pcm_substream *substream)
 {
 	return snd_usb_pcm_open(substream, SNDRV_PCM_STREAM_PLAYBACK, &snd_usb_playback);
 }
 
-static int snd_usb_playback_close(snd_pcm_substream_t *substream)
+static int snd_usb_playback_close(struct snd_pcm_substream *substream)
 {
 	return snd_usb_pcm_close(substream, SNDRV_PCM_STREAM_PLAYBACK);
 }
 
-static int snd_usb_capture_open(snd_pcm_substream_t *substream)
+static int snd_usb_capture_open(struct snd_pcm_substream *substream)
 {
 	return snd_usb_pcm_open(substream, SNDRV_PCM_STREAM_CAPTURE, &snd_usb_capture);
 }
 
-static int snd_usb_capture_close(snd_pcm_substream_t *substream)
+static int snd_usb_capture_close(struct snd_pcm_substream *substream)
 {
 	return snd_usb_pcm_close(substream, SNDRV_PCM_STREAM_CAPTURE);
 }
 
-static snd_pcm_ops_t snd_usb_playback_ops = {
+static struct snd_pcm_ops snd_usb_playback_ops = {
 	.open =		snd_usb_playback_open,
 	.close =	snd_usb_playback_close,
 	.ioctl =	snd_pcm_lib_ioctl,
 	.hw_params =	snd_usb_hw_params,
 	.hw_free =	snd_usb_hw_free,
 	.prepare =	snd_usb_pcm_prepare,
-	.trigger =	snd_usb_pcm_trigger,
+	.trigger =	snd_usb_pcm_playback_trigger,
 	.pointer =	snd_usb_pcm_pointer,
+	.page =		snd_pcm_get_vmalloc_page,
 };
 
-static snd_pcm_ops_t snd_usb_capture_ops = {
+static struct snd_pcm_ops snd_usb_capture_ops = {
 	.open =		snd_usb_capture_open,
 	.close =	snd_usb_capture_close,
 	.ioctl =	snd_pcm_lib_ioctl,
 	.hw_params =	snd_usb_hw_params,
 	.hw_free =	snd_usb_hw_free,
 	.prepare =	snd_usb_pcm_prepare,
-	.trigger =	snd_usb_pcm_trigger,
+	.trigger =	snd_usb_pcm_capture_trigger,
 	.pointer =	snd_usb_pcm_pointer,
+	.page =		snd_pcm_get_vmalloc_page,
 };
 
 
@@ -1931,7 +2042,6 @@ static struct usb_device_id usb_audio_ids [] = {
 MODULE_DEVICE_TABLE (usb, usb_audio_ids);
 
 static struct usb_driver usb_audio_driver = {
-	.owner =	THIS_MODULE,
 	.name =		"snd-usb-audio",
 	.probe =	usb_audio_probe,
 	.disconnect =	usb_audio_disconnect,
@@ -1939,10 +2049,12 @@ static struct usb_driver usb_audio_driver = {
 };
 
 
+#if defined(CONFIG_PROCFS) && defined(CONFIG_SND_VERBOSE_PROCFS)
+
 /*
  * proc interface for list the supported pcm formats
  */
-static void proc_dump_substream_formats(snd_usb_substream_t *subs, snd_info_buffer_t *buffer)
+static void proc_dump_substream_formats(struct snd_usb_substream *subs, struct snd_info_buffer *buffer)
 {
 	struct list_head *p;
 	static char *sync_types[4] = {
@@ -1954,7 +2066,7 @@ static void proc_dump_substream_formats(snd_usb_substream_t *subs, snd_info_buff
 		fp = list_entry(p, struct audioformat, list);
 		snd_iprintf(buffer, "  Interface %d\n", fp->iface);
 		snd_iprintf(buffer, "    Altset %d\n", fp->altsetting);
-		snd_iprintf(buffer, "    Format: %s\n", snd_pcm_format_name(fp->format));
+		snd_iprintf(buffer, "    Format: 0x%x\n", fp->format);
 		snd_iprintf(buffer, "    Channels: %d\n", fp->channels);
 		snd_iprintf(buffer, "    Endpoint: %d %s (%s)\n",
 			    fp->endpoint & USB_ENDPOINT_NUMBER_MASK,
@@ -1978,7 +2090,7 @@ static void proc_dump_substream_formats(snd_usb_substream_t *subs, snd_info_buff
 	}
 }
 
-static void proc_dump_substream_status(snd_usb_substream_t *subs, snd_info_buffer_t *buffer)
+static void proc_dump_substream_status(struct snd_usb_substream *subs, struct snd_info_buffer *buffer)
 {
 	if (subs->running) {
 		unsigned int i;
@@ -1990,18 +2102,19 @@ static void proc_dump_substream_status(snd_usb_substream_t *subs, snd_info_buffe
 			snd_iprintf(buffer, "%d ", subs->dataurb[i].packets);
 		snd_iprintf(buffer, "]\n");
 		snd_iprintf(buffer, "    Packet Size = %d\n", subs->curpacksize);
-		snd_iprintf(buffer, "    Momentary freq = %u Hz\n",
+		snd_iprintf(buffer, "    Momentary freq = %u Hz (%#x.%04x)\n",
 			    snd_usb_get_speed(subs->dev) == USB_SPEED_FULL
 			    ? get_full_speed_hz(subs->freqm)
-			    : get_high_speed_hz(subs->freqm));
+			    : get_high_speed_hz(subs->freqm),
+			    subs->freqm >> 16, subs->freqm & 0xffff);
 	} else {
 		snd_iprintf(buffer, "  Status: Stop\n");
 	}
 }
 
-static void proc_pcm_format_read(snd_info_entry_t *entry, snd_info_buffer_t *buffer)
+static void proc_pcm_format_read(struct snd_info_entry *entry, struct snd_info_buffer *buffer)
 {
-	snd_usb_stream_t *stream = entry->private_data;
+	struct snd_usb_stream *stream = entry->private_data;
 
 	snd_iprintf(buffer, "%s : %s\n", stream->chip->card->longname, stream->pcm->name);
 
@@ -2017,25 +2130,32 @@ static void proc_pcm_format_read(snd_info_entry_t *entry, snd_info_buffer_t *buf
 	}
 }
 
-static void proc_pcm_format_add(snd_usb_stream_t *stream)
+static void proc_pcm_format_add(struct snd_usb_stream *stream)
 {
-	snd_info_entry_t *entry;
+	struct snd_info_entry *entry;
 	char name[32];
-	snd_card_t *card = stream->chip->card;
+	struct snd_card *card = stream->chip->card;
 
 	sprintf(name, "stream%d", stream->pcm_index);
 	if (! snd_card_proc_new(card, name, &entry))
 		snd_info_set_text_ops(entry, stream, 1024, proc_pcm_format_read);
 }
 
+#else
+
+static inline void proc_pcm_format_add(struct snd_usb_stream *stream)
+{
+}
+
+#endif
 
 /*
  * initialize the substream instance.
  */
 
-static void init_substream(snd_usb_stream_t *as, int stream, struct audioformat *fp)
+static void init_substream(struct snd_usb_stream *as, int stream, struct audioformat *fp)
 {
-	snd_usb_substream_t *subs = &as->substream[stream];
+	struct snd_usb_substream *subs = &as->substream[stream];
 
 	INIT_LIST_HEAD(&subs->fmt_list);
 	spin_lock_init(&subs->lock);
@@ -2047,10 +2167,6 @@ static void init_substream(snd_usb_stream_t *as, int stream, struct audioformat
 		subs->ops = audio_urb_ops[stream];
 	else
 		subs->ops = audio_urb_ops_high_speed[stream];
-	snd_pcm_lib_preallocate_pages(as->pcm->streams[stream].substream,
-				      SNDRV_DMA_TYPE_CONTINUOUS,
-				      snd_dma_continuous_data(GFP_KERNEL),
-				      64 * 1024, 128 * 1024);
 	snd_pcm_set_ops(as->pcm, stream,
 			stream == SNDRV_PCM_STREAM_PLAYBACK ?
 			&snd_usb_playback_ops : &snd_usb_capture_ops);
@@ -2066,7 +2182,7 @@ static void init_substream(snd_usb_stream_t *as, int stream, struct audioformat
 /*
  * free a substream
  */
-static void free_substream(snd_usb_substream_t *subs)
+static void free_substream(struct snd_usb_substream *subs)
 {
 	struct list_head *p, *n;
 
@@ -2083,7 +2199,7 @@ static void free_substream(snd_usb_substream_t *subs)
 /*
  * free a usb stream instance
  */
-static void snd_usb_audio_stream_free(snd_usb_stream_t *stream)
+static void snd_usb_audio_stream_free(struct snd_usb_stream *stream)
 {
 	free_substream(&stream->substream[0]);
 	free_substream(&stream->substream[1]);
@@ -2091,12 +2207,11 @@ static void snd_usb_audio_stream_free(snd_usb_stream_t *stream)
 	kfree(stream);
 }
 
-static void snd_usb_audio_pcm_free(snd_pcm_t *pcm)
+static void snd_usb_audio_pcm_free(struct snd_pcm *pcm)
 {
-	snd_usb_stream_t *stream = pcm->private_data;
+	struct snd_usb_stream *stream = pcm->private_data;
 	if (stream) {
 		stream->pcm = NULL;
-		snd_pcm_lib_preallocate_free_for_all(pcm);
 		snd_usb_audio_stream_free(stream);
 	}
 }
@@ -2107,16 +2222,16 @@ static void snd_usb_audio_pcm_free(snd_pcm_t *pcm)
  * if a stream with the same endpoint already exists, append to it.
  * if not, create a new pcm stream.
  */
-static int add_audio_endpoint(snd_usb_audio_t *chip, int stream, struct audioformat *fp)
+static int add_audio_endpoint(struct snd_usb_audio *chip, int stream, struct audioformat *fp)
 {
 	struct list_head *p;
-	snd_usb_stream_t *as;
-	snd_usb_substream_t *subs;
-	snd_pcm_t *pcm;
+	struct snd_usb_stream *as;
+	struct snd_usb_substream *subs;
+	struct snd_pcm *pcm;
 	int err;
 
 	list_for_each(p, &chip->pcm_list) {
-		as = list_entry(p, snd_usb_stream_t, list);
+		as = list_entry(p, struct snd_usb_stream, list);
 		if (as->fmt_type != fp->fmt_type)
 			continue;
 		subs = &as->substream[stream];
@@ -2131,7 +2246,7 @@ static int add_audio_endpoint(snd_usb_audio_t *chip, int stream, struct audiofor
 	}
 	/* look for an empty stream */
 	list_for_each(p, &chip->pcm_list) {
-		as = list_entry(p, snd_usb_stream_t, list);
+		as = list_entry(p, struct snd_usb_stream, list);
 		if (as->fmt_type != fp->fmt_type)
 			continue;
 		subs = &as->substream[stream];
@@ -2183,17 +2298,15 @@ static int add_audio_endpoint(snd_usb_audio_t *chip, int stream, struct audiofor
 /*
  * check if the device uses big-endian samples
  */
-static int is_big_endian_format(struct usb_device *dev, struct audioformat *fp)
+static int is_big_endian_format(struct snd_usb_audio *chip, struct audioformat *fp)
 {
-	/* M-Audio */
-	if (le16_to_cpu(dev->descriptor.idVendor) == 0x0763) {
-		/* Quattro: captured data only */
-		if (le16_to_cpu(dev->descriptor.idProduct) == 0x2001 &&
-		    fp->endpoint & USB_DIR_IN)
-			return 1;
-		/* Audiophile USB */
-		if (le16_to_cpu(dev->descriptor.idProduct) == 0x2003)
+	switch (chip->usb_id) {
+	case USB_ID(0x0763, 0x2001): /* M-Audio Quattro: captured data only */
+		if (fp->endpoint & USB_DIR_IN)
 			return 1;
+		break;
+	case USB_ID(0x0763, 0x2003): /* M-Audio Audiophile USB */
+		return 1;
 	}
 	return 0;
 }
@@ -2207,7 +2320,7 @@ static int is_big_endian_format(struct usb_device *dev, struct audioformat *fp)
  * @format: the format tag (wFormatTag)
  * @fmt: the format type descriptor
  */
-static int parse_audio_format_i_type(struct usb_device *dev, struct audioformat *fp,
+static int parse_audio_format_i_type(struct snd_usb_audio *chip, struct audioformat *fp,
 				     int format, unsigned char *fmt)
 {
 	int pcm_format;
@@ -2220,12 +2333,12 @@ static int parse_audio_format_i_type(struct usb_device *dev, struct audioformat
 	switch (format) {
 	case 0: /* some devices don't define this correctly... */
 		snd_printdd(KERN_INFO "%d:%u:%d : format type 0 is detected, processed as PCM\n",
-			    dev->devnum, fp->iface, fp->altsetting);
+			    chip->dev->devnum, fp->iface, fp->altsetting);
 		/* fall-through */
 	case USB_AUDIO_FORMAT_PCM:
 		if (sample_width > sample_bytes * 8) {
 			snd_printk(KERN_INFO "%d:%u:%d : sample bitwidth %d in over sample bytes %d\n",
-				   dev->devnum, fp->iface, fp->altsetting,
+				   chip->dev->devnum, fp->iface, fp->altsetting,
 				   sample_width, sample_bytes);
 		}
 		/* check the format byte size */
@@ -2234,13 +2347,13 @@ static int parse_audio_format_i_type(struct usb_device *dev, struct audioformat
 			pcm_format = SNDRV_PCM_FORMAT_S8;
 			break;
 		case 2:
-			if (is_big_endian_format(dev, fp))
+			if (is_big_endian_format(chip, fp))
 				pcm_format = SNDRV_PCM_FORMAT_S16_BE; /* grrr, big endian!! */
 			else
 				pcm_format = SNDRV_PCM_FORMAT_S16_LE;
 			break;
 		case 3:
-			if (is_big_endian_format(dev, fp))
+			if (is_big_endian_format(chip, fp))
 				pcm_format = SNDRV_PCM_FORMAT_S24_3BE; /* grrr, big endian!! */
 			else
 				pcm_format = SNDRV_PCM_FORMAT_S24_3LE;
@@ -2250,14 +2363,14 @@ static int parse_audio_format_i_type(struct usb_device *dev, struct audioformat
 			break;
 		default:
 			snd_printk(KERN_INFO "%d:%u:%d : unsupported sample bitwidth %d in %d bytes\n",
-				   dev->devnum, fp->iface, fp->altsetting, sample_width, sample_bytes);
+				   chip->dev->devnum, fp->iface,
+				   fp->altsetting, sample_width, sample_bytes);
 			break;
 		}
 		break;
 	case USB_AUDIO_FORMAT_PCM8:
 		/* Dallas DS4201 workaround */
-		if (le16_to_cpu(dev->descriptor.idVendor) == 0x04fa &&
-		    le16_to_cpu(dev->descriptor.idProduct) == 0x4201)
+		if (chip->usb_id == USB_ID(0x04fa, 0x4201))
 			pcm_format = SNDRV_PCM_FORMAT_S8;
 		else
 			pcm_format = SNDRV_PCM_FORMAT_U8;
@@ -2273,7 +2386,7 @@ static int parse_audio_format_i_type(struct usb_device *dev, struct audioformat
 		break;
 	default:
 		snd_printk(KERN_INFO "%d:%u:%d : unsupported format type %d\n",
-			   dev->devnum, fp->iface, fp->altsetting, format);
+			   chip->dev->devnum, fp->iface, fp->altsetting, format);
 		break;
 	}
 	return pcm_format;
@@ -2290,13 +2403,13 @@ static int parse_audio_format_i_type(struct usb_device *dev, struct audioformat
  * @offset: the start offset of descriptor pointing the rate type
  *          (7 for type I and II, 8 for type II)
  */
-static int parse_audio_format_rates(struct usb_device *dev, struct audioformat *fp,
+static int parse_audio_format_rates(struct snd_usb_audio *chip, struct audioformat *fp,
 				    unsigned char *fmt, int offset)
 {
 	int nr_rates = fmt[offset];
 	if (fmt[0] < offset + 1 + 3 * (nr_rates ? nr_rates : 2)) {
 		snd_printk(KERN_ERR "%d:%u:%d : invalid FORMAT_TYPE desc\n",
-				   dev->devnum, fp->iface, fp->altsetting);
+				   chip->dev->devnum, fp->iface, fp->altsetting);
 		return -1;
 	}
 
@@ -2343,7 +2456,7 @@ static int parse_audio_format_rates(struct usb_device *dev, struct audioformat *
 /*
  * parse the format type I and III descriptors
  */
-static int parse_audio_format_i(struct usb_device *dev, struct audioformat *fp,
+static int parse_audio_format_i(struct snd_usb_audio *chip, struct audioformat *fp,
 				int format, unsigned char *fmt)
 {
 	int pcm_format;
@@ -2355,7 +2468,7 @@ static int parse_audio_format_i(struct usb_device *dev, struct audioformat *fp,
 		 */
 		pcm_format = SNDRV_PCM_FORMAT_S16_LE;
 	} else {
-		pcm_format = parse_audio_format_i_type(dev, fp, format, fmt);
+		pcm_format = parse_audio_format_i_type(chip, fp, format, fmt);
 		if (pcm_format < 0)
 			return -1;
 	}
@@ -2363,16 +2476,16 @@ static int parse_audio_format_i(struct usb_device *dev, struct audioformat *fp,
 	fp->channels = fmt[4];
 	if (fp->channels < 1) {
 		snd_printk(KERN_ERR "%d:%u:%d : invalid channels %d\n",
-			   dev->devnum, fp->iface, fp->altsetting, fp->channels);
+			   chip->dev->devnum, fp->iface, fp->altsetting, fp->channels);
 		return -1;
 	}
-	return parse_audio_format_rates(dev, fp, fmt, 7);
+	return parse_audio_format_rates(chip, fp, fmt, 7);
 }
 
 /*
  * prase the format type II descriptor
  */
-static int parse_audio_format_ii(struct usb_device *dev, struct audioformat *fp,
+static int parse_audio_format_ii(struct snd_usb_audio *chip, struct audioformat *fp,
 				 int format, unsigned char *fmt)
 {
 	int brate, framesize;
@@ -2387,7 +2500,7 @@ static int parse_audio_format_ii(struct usb_device *dev, struct audioformat *fp,
 		break;
 	default:
 		snd_printd(KERN_INFO "%d:%u:%d : unknown format tag 0x%x is detected.  processed as MPEG.\n",
-			   dev->devnum, fp->iface, fp->altsetting, format);
+			   chip->dev->devnum, fp->iface, fp->altsetting, format);
 		fp->format = SNDRV_PCM_FORMAT_MPEG;
 		break;
 	}
@@ -2396,10 +2509,10 @@ static int parse_audio_format_ii(struct usb_device *dev, struct audioformat *fp,
 	framesize = combine_word(&fmt[6]); /* fmt[6,7]: wSamplesPerFrame */
 	snd_printd(KERN_INFO "found format II with max.bitrate = %d, frame size=%d\n", brate, framesize);
 	fp->frame_size = framesize;
-	return parse_audio_format_rates(dev, fp, fmt, 8); /* fmt[8..] sample rates */
+	return parse_audio_format_rates(chip, fp, fmt, 8); /* fmt[8..] sample rates */
 }
 
-static int parse_audio_format(struct usb_device *dev, struct audioformat *fp,
+static int parse_audio_format(struct snd_usb_audio *chip, struct audioformat *fp,
 			      int format, unsigned char *fmt, int stream)
 {
 	int err;
@@ -2407,36 +2520,39 @@ static int parse_audio_format(struct usb_device *dev, struct audioformat *fp,
 	switch (fmt[3]) {
 	case USB_FORMAT_TYPE_I:
 	case USB_FORMAT_TYPE_III:
-		err = parse_audio_format_i(dev, fp, format, fmt);
+		err = parse_audio_format_i(chip, fp, format, fmt);
 		break;
 	case USB_FORMAT_TYPE_II:
-		err = parse_audio_format_ii(dev, fp, format, fmt);
+		err = parse_audio_format_ii(chip, fp, format, fmt);
 		break;
 	default:
 		snd_printd(KERN_INFO "%d:%u:%d : format type %d is not supported yet\n",
-			   dev->devnum, fp->iface, fp->altsetting, fmt[3]);
+			   chip->dev->devnum, fp->iface, fp->altsetting, fmt[3]);
 		return -1;
 	}
 	fp->fmt_type = fmt[3];
 	if (err < 0)
 		return err;
 #if 1
-	/* FIXME: temporary hack for extigy */
+	/* FIXME: temporary hack for extigy/audigy 2 nx/zs */
 	/* extigy apparently supports sample rates other than 48k
 	 * but not in ordinary way.  so we enable only 48k atm.
 	 */
-	if (le16_to_cpu(dev->descriptor.idVendor) == 0x041e && 
-	    le16_to_cpu(dev->descriptor.idProduct) == 0x3000) {
+	if (chip->usb_id == USB_ID(0x041e, 0x3000) ||
+	    chip->usb_id == USB_ID(0x041e, 0x3020) ||
+	    chip->usb_id == USB_ID(0x041e, 0x3061)) {
 		if (fmt[3] == USB_FORMAT_TYPE_I &&
-		    stream == SNDRV_PCM_STREAM_PLAYBACK &&
-		    fp->rates != SNDRV_PCM_RATE_48000)
-			return -1; /* use 48k only */
+		    fp->rates != SNDRV_PCM_RATE_48000 &&
+		    fp->rates != SNDRV_PCM_RATE_96000)
+			return -1;
 	}
 #endif
 	return 0;
 }
 
-static int parse_audio_endpoints(snd_usb_audio_t *chip, int iface_no)
+static int audiophile_skip_setting_quirk(struct snd_usb_audio *chip,
+					 int iface, int altno);
+static int parse_audio_endpoints(struct snd_usb_audio *chip, int iface_no)
 {
 	struct usb_device *dev;
 	struct usb_interface *iface;
@@ -2470,6 +2586,12 @@ static int parse_audio_endpoints(snd_usb_audio_t *chip, int iface_no)
 		stream = (get_endpoint(alts, 0)->bEndpointAddress & USB_DIR_IN) ?
 			SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK;
 		altno = altsd->bAlternateSetting;
+	
+		/* audiophile usb: skip altsets incompatible with device_setup
+		 */
+		if (chip->usb_id == USB_ID(0x0763, 0x2003) && 
+		    audiophile_skip_setting_quirk(chip, iface_no, altno))
+			continue;
 
 		/* get audio formats */
 		fmt = snd_usb_find_csint_desc(alts->extra, alts->extralen, NULL, AS_GENERAL);
@@ -2522,52 +2644,49 @@ static int parse_audio_endpoints(snd_usb_audio_t *chip, int iface_no)
 		fp->altset_idx = i;
 		fp->endpoint = get_endpoint(alts, 0)->bEndpointAddress;
 		fp->ep_attr = get_endpoint(alts, 0)->bmAttributes;
-		/* FIXME: decode wMaxPacketSize of high bandwith endpoints */
 		fp->maxpacksize = le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize);
+		if (snd_usb_get_speed(dev) == USB_SPEED_HIGH)
+			fp->maxpacksize = (((fp->maxpacksize >> 11) & 3) + 1)
+					* (fp->maxpacksize & 0x7ff);
 		fp->attributes = csep[3];
 
 		/* some quirks for attributes here */
 
-		/* workaround for AudioTrak Optoplay */
-		if (le16_to_cpu(dev->descriptor.idVendor) == 0x0a92 &&
-		    le16_to_cpu(dev->descriptor.idProduct) == 0x0053) {
+		switch (chip->usb_id) {
+		case USB_ID(0x0a92, 0x0053): /* AudioTrak Optoplay */
 			/* Optoplay sets the sample rate attribute although
 			 * it seems not supporting it in fact.
 			 */
 			fp->attributes &= ~EP_CS_ATTR_SAMPLE_RATE;
-		}
-
-		/* workaround for M-Audio Audiophile USB */
-		if (le16_to_cpu(dev->descriptor.idVendor) == 0x0763 &&
-		    le16_to_cpu(dev->descriptor.idProduct) == 0x2003) {
+			break;
+		case USB_ID(0x041e, 0x3020): /* Creative SB Audigy 2 NX */
+		case USB_ID(0x0763, 0x2003): /* M-Audio Audiophile USB */
 			/* doesn't set the sample rate attribute, but supports it */
 			fp->attributes |= EP_CS_ATTR_SAMPLE_RATE;
-		}
-
+			break;
+		case USB_ID(0x047f, 0x0ca1): /* plantronics headset */
+		case USB_ID(0x077d, 0x07af): /* Griffin iMic (note that there is
+						an older model 77d:223) */
 		/*
 		 * plantronics headset and Griffin iMic have set adaptive-in
 		 * although it's really not...
 		 */
-		if ((le16_to_cpu(dev->descriptor.idVendor) == 0x047f &&
-		     le16_to_cpu(dev->descriptor.idProduct) == 0x0ca1) ||
-		    /* Griffin iMic (note that there is an older model 77d:223) */
-		    (le16_to_cpu(dev->descriptor.idVendor) == 0x077d &&
-		     le16_to_cpu(dev->descriptor.idProduct) == 0x07af)) {
 			fp->ep_attr &= ~EP_ATTR_MASK;
 			if (stream == SNDRV_PCM_STREAM_PLAYBACK)
 				fp->ep_attr |= EP_ATTR_ADAPTIVE;
 			else
 				fp->ep_attr |= EP_ATTR_SYNC;
+			break;
 		}
 
 		/* ok, let's parse further... */
-		if (parse_audio_format(dev, fp, format, fmt, stream) < 0) {
+		if (parse_audio_format(chip, fp, format, fmt, stream) < 0) {
 			kfree(fp->rate_table);
 			kfree(fp);
 			continue;
 		}
 
-		snd_printdd(KERN_INFO "%d:%u:%d: add audio endpoint 0x%x\n", dev->devnum, iface_no, i, fp->endpoint);
+		snd_printdd(KERN_INFO "%d:%u:%d: add audio endpoint 0x%x\n", dev->devnum, iface_no, altno, fp->endpoint);
 		err = add_audio_endpoint(chip, stream, fp);
 		if (err < 0) {
 			kfree(fp->rate_table);
@@ -2587,13 +2706,13 @@ static int parse_audio_endpoints(snd_usb_audio_t *chip, int iface_no)
  * disconnect streams
  * called from snd_usb_audio_disconnect()
  */
-static void snd_usb_stream_disconnect(struct list_head *head, struct usb_driver *driver)
+static void snd_usb_stream_disconnect(struct list_head *head)
 {
 	int idx;
-	snd_usb_stream_t *as;
-	snd_usb_substream_t *subs;
+	struct snd_usb_stream *as;
+	struct snd_usb_substream *subs;
 
-	as = list_entry(head, snd_usb_stream_t, list);
+	as = list_entry(head, struct snd_usb_stream, list);
 	for (idx = 0; idx < 2; idx++) {
 		subs = &as->substream[idx];
 		if (!subs->num_formats)
@@ -2606,7 +2725,7 @@ static void snd_usb_stream_disconnect(struct list_head *head, struct usb_driver
 /*
  * parse audio control descriptor and create pcm/midi streams
  */
-static int snd_usb_create_streams(snd_usb_audio_t *chip, int ctrlif)
+static int snd_usb_create_streams(struct snd_usb_audio *chip, int ctrlif)
 {
 	struct usb_device *dev = chip->dev;
 	struct usb_host_interface *host_iface;
@@ -2673,9 +2792,9 @@ static int snd_usb_create_streams(snd_usb_audio_t *chip, int ctrlif)
 /*
  * create a stream for an endpoint/altsetting without proper descriptors
  */
-static int create_fixed_stream_quirk(snd_usb_audio_t *chip,
+static int create_fixed_stream_quirk(struct snd_usb_audio *chip,
 				     struct usb_interface *iface,
-				     const snd_usb_audio_quirk_t *quirk)
+				     const struct snd_usb_audio_quirk *quirk)
 {
 	struct audioformat *fp;
 	struct usb_host_interface *alts;
@@ -2722,9 +2841,9 @@ static int create_fixed_stream_quirk(snd_usb_audio_t *chip,
 /*
  * create a stream for an interface with proper descriptors
  */
-static int create_standard_interface_quirk(snd_usb_audio_t *chip,
-					   struct usb_interface *iface,
-					   const snd_usb_audio_quirk_t *quirk)
+static int create_standard_audio_quirk(struct snd_usb_audio *chip,
+				       struct usb_interface *iface,
+				       const struct snd_usb_audio_quirk *quirk)
 {
 	struct usb_host_interface *alts;
 	struct usb_interface_descriptor *altsd;
@@ -2732,24 +2851,14 @@ static int create_standard_interface_quirk(snd_usb_audio_t *chip,
 
 	alts = &iface->altsetting[0];
 	altsd = get_iface_desc(alts);
-	switch (quirk->type) {
-	case QUIRK_AUDIO_STANDARD_INTERFACE:
-		err = parse_audio_endpoints(chip, altsd->bInterfaceNumber);
-		if (!err)
-			usb_set_interface(chip->dev, altsd->bInterfaceNumber, 0); /* reset the current interface */
-		break;
-	case QUIRK_MIDI_STANDARD_INTERFACE:
-		err = snd_usb_create_midi_interface(chip, iface, NULL);
-		break;
-	default:
-		snd_printd(KERN_ERR "invalid quirk type %d\n", quirk->type);
-		return -ENXIO;
-	}
+	err = parse_audio_endpoints(chip, altsd->bInterfaceNumber);
 	if (err < 0) {
 		snd_printk(KERN_ERR "cannot setup if %d: error %d\n",
 			   altsd->bInterfaceNumber, err);
 		return err;
 	}
+	/* reset the current interface */
+	usb_set_interface(chip->dev, altsd->bInterfaceNumber, 0);
 	return 0;
 }
 
@@ -2757,8 +2866,9 @@ static int create_standard_interface_quirk(snd_usb_audio_t *chip,
  * Create a stream for an Edirol UA-700/UA-25 interface.  The only way
  * to detect the sample rate is by looking at wMaxPacketSize.
  */
-static int create_ua700_ua25_quirk(snd_usb_audio_t *chip,
-				   struct usb_interface *iface)
+static int create_ua700_ua25_quirk(struct snd_usb_audio *chip,
+				   struct usb_interface *iface,
+				   const struct snd_usb_audio_quirk *quirk)
 {
 	static const struct audioformat ua_format = {
 		.format = SNDRV_PCM_FORMAT_S24_3LE,
@@ -2780,23 +2890,23 @@ static int create_ua700_ua25_quirk(snd_usb_audio_t *chip,
 	altsd = get_iface_desc(alts);
 
 	if (altsd->bNumEndpoints == 2) {
-		static const snd_usb_midi_endpoint_info_t ua700_ep = {
+		static const struct snd_usb_midi_endpoint_info ua700_ep = {
 			.out_cables = 0x0003,
 			.in_cables  = 0x0003
 		};
-		static const snd_usb_audio_quirk_t ua700_quirk = {
+		static const struct snd_usb_audio_quirk ua700_quirk = {
 			.type = QUIRK_MIDI_FIXED_ENDPOINT,
 			.data = &ua700_ep
 		};
-		static const snd_usb_midi_endpoint_info_t ua25_ep = {
+		static const struct snd_usb_midi_endpoint_info ua25_ep = {
 			.out_cables = 0x0001,
 			.in_cables  = 0x0001
 		};
-		static const snd_usb_audio_quirk_t ua25_quirk = {
+		static const struct snd_usb_audio_quirk ua25_quirk = {
 			.type = QUIRK_MIDI_FIXED_ENDPOINT,
 			.data = &ua25_ep
 		};
-		if (le16_to_cpu(chip->dev->descriptor.idProduct) == 0x002b)
+		if (chip->usb_id == USB_ID(0x0582, 0x002b))
 			return snd_usb_create_midi_interface(chip, iface,
 							     &ua700_quirk);
 		else
@@ -2849,7 +2959,9 @@ static int create_ua700_ua25_quirk(snd_usb_audio_t *chip,
 /*
  * Create a stream for an Edirol UA-1000 interface.
  */
-static int create_ua1000_quirk(snd_usb_audio_t *chip, struct usb_interface *iface)
+static int create_ua1000_quirk(struct snd_usb_audio *chip,
+			       struct usb_interface *iface,
+			       const struct snd_usb_audio_quirk *quirk)
 {
 	static const struct audioformat ua1000_format = {
 		.format = SNDRV_PCM_FORMAT_S32_LE,
@@ -2896,16 +3008,16 @@ static int create_ua1000_quirk(snd_usb_audio_t *chip, struct usb_interface *ifac
 	return 0;
 }
 
-static int snd_usb_create_quirk(snd_usb_audio_t *chip,
+static int snd_usb_create_quirk(struct snd_usb_audio *chip,
 				struct usb_interface *iface,
-				const snd_usb_audio_quirk_t *quirk);
+				const struct snd_usb_audio_quirk *quirk);
 
 /*
  * handle the quirks for the contained interfaces
  */
-static int create_composite_quirk(snd_usb_audio_t *chip,
+static int create_composite_quirk(struct snd_usb_audio *chip,
 				  struct usb_interface *iface,
-				  const snd_usb_audio_quirk_t *quirk)
+				  const struct snd_usb_audio_quirk *quirk)
 {
 	int probed_ifnum = get_iface_desc(iface->altsetting)->bInterfaceNumber;
 	int err;
@@ -2926,6 +3038,13 @@ static int create_composite_quirk(snd_usb_audio_t *chip,
 	return 0;
 }
 
+static int ignore_interface_quirk(struct snd_usb_audio *chip,
+				  struct usb_interface *iface,
+				  const struct snd_usb_audio_quirk *quirk)
+{
+	return 0;
+}
+
 
 /*
  * boot quirks
@@ -2959,6 +3078,61 @@ static int snd_usb_extigy_boot_quirk(struct usb_device *dev, struct usb_interfac
 	return 0;
 }
 
+static int snd_usb_audigy2nx_boot_quirk(struct usb_device *dev)
+{
+	u8 buf = 1;
+
+	snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0), 0x2a,
+			USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_OTHER,
+			0, 0, &buf, 1, 1000);
+	if (buf == 0) {
+		snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), 0x29,
+				USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_OTHER,
+				1, 2000, NULL, 0, 1000);
+		return -ENODEV;
+	}
+	return 0;
+}
+
+/*
+ * Setup quirks
+ */
+#define AUDIOPHILE_SET			0x01 /* if set, parse device_setup */
+#define AUDIOPHILE_SET_DTS              0x02 /* if set, enable DTS Digital Output */
+#define AUDIOPHILE_SET_96K              0x04 /* 48-96KHz rate if set, 8-48KHz otherwise */
+#define AUDIOPHILE_SET_24B		0x08 /* 24bits sample if set, 16bits otherwise */
+#define AUDIOPHILE_SET_DI		0x10 /* if set, enable Digital Input */
+#define AUDIOPHILE_SET_MASK		0x1F /* bit mask for setup value */
+#define AUDIOPHILE_SET_24B_48K_DI	0x19 /* value for 24bits+48KHz+Digital Input */
+#define AUDIOPHILE_SET_24B_48K_NOTDI	0x09 /* value for 24bits+48KHz+No Digital Input */
+#define AUDIOPHILE_SET_16B_48K_DI	0x11 /* value for 16bits+48KHz+Digital Input */
+#define AUDIOPHILE_SET_16B_48K_NOTDI	0x01 /* value for 16bits+48KHz+No Digital Input */
+
+static int audiophile_skip_setting_quirk(struct snd_usb_audio *chip,
+					 int iface, int altno)
+{
+	if (device_setup[chip->index] & AUDIOPHILE_SET) {
+		if ((device_setup[chip->index] & AUDIOPHILE_SET_DTS)
+		    && altno != 6)
+			return 1; /* skip this altsetting */
+		if ((device_setup[chip->index] & AUDIOPHILE_SET_96K)
+		    && altno != 1)
+			return 1; /* skip this altsetting */
+		if ((device_setup[chip->index] & AUDIOPHILE_SET_MASK) ==
+		    AUDIOPHILE_SET_24B_48K_DI && altno != 2)
+			return 1; /* skip this altsetting */
+		if ((device_setup[chip->index] & AUDIOPHILE_SET_MASK) ==
+		    AUDIOPHILE_SET_24B_48K_NOTDI && altno != 3)
+			return 1; /* skip this altsetting */
+		if ((device_setup[chip->index] & AUDIOPHILE_SET_MASK) ==
+		    AUDIOPHILE_SET_16B_48K_DI && altno != 4)
+			return 1; /* skip this altsetting */
+		if ((device_setup[chip->index] & AUDIOPHILE_SET_MASK) ==
+		    AUDIOPHILE_SET_16B_48K_NOTDI && altno != 5)
+			return 1; /* skip this altsetting */
+	}	
+	return 0; /* keep this altsetting */
+}
 
 /*
  * audio-interface quirks
@@ -2968,32 +3142,32 @@ static int snd_usb_extigy_boot_quirk(struct usb_device *dev, struct usb_interfac
  * after this.
  * returns a negative value at error.
  */
-static int snd_usb_create_quirk(snd_usb_audio_t *chip,
+static int snd_usb_create_quirk(struct snd_usb_audio *chip,
 				struct usb_interface *iface,
-				const snd_usb_audio_quirk_t *quirk)
-{
-	switch (quirk->type) {
-	case QUIRK_MIDI_FIXED_ENDPOINT:
-	case QUIRK_MIDI_YAMAHA:
-	case QUIRK_MIDI_MIDIMAN:
-	case QUIRK_MIDI_NOVATION:
-	case QUIRK_MIDI_MOTU:
-	case QUIRK_MIDI_EMAGIC:
-		return snd_usb_create_midi_interface(chip, iface, quirk);
-	case QUIRK_COMPOSITE:
-		return create_composite_quirk(chip, iface, quirk);
-	case QUIRK_AUDIO_FIXED_ENDPOINT:
-		return create_fixed_stream_quirk(chip, iface, quirk);
-	case QUIRK_AUDIO_STANDARD_INTERFACE:
-	case QUIRK_MIDI_STANDARD_INTERFACE:
-		return create_standard_interface_quirk(chip, iface, quirk);
-	case QUIRK_AUDIO_EDIROL_UA700_UA25:
-		return create_ua700_ua25_quirk(chip, iface);
-	case QUIRK_AUDIO_EDIROL_UA1000:
-		return create_ua1000_quirk(chip, iface);
-	case QUIRK_IGNORE_INTERFACE:
-		return 0;
-	default:
+				const struct snd_usb_audio_quirk *quirk)
+{
+	typedef int (*quirk_func_t)(struct snd_usb_audio *, struct usb_interface *,
+				    const struct snd_usb_audio_quirk *);
+	static const quirk_func_t quirk_funcs[] = {
+		[QUIRK_IGNORE_INTERFACE] = ignore_interface_quirk,
+		[QUIRK_COMPOSITE] = create_composite_quirk,
+		[QUIRK_MIDI_STANDARD_INTERFACE] = snd_usb_create_midi_interface,
+		[QUIRK_MIDI_FIXED_ENDPOINT] = snd_usb_create_midi_interface,
+		[QUIRK_MIDI_YAMAHA] = snd_usb_create_midi_interface,
+		[QUIRK_MIDI_MIDIMAN] = snd_usb_create_midi_interface,
+		[QUIRK_MIDI_NOVATION] = snd_usb_create_midi_interface,
+		[QUIRK_MIDI_RAW] = snd_usb_create_midi_interface,
+		[QUIRK_MIDI_EMAGIC] = snd_usb_create_midi_interface,
+		[QUIRK_MIDI_CME] = snd_usb_create_midi_interface,
+		[QUIRK_AUDIO_STANDARD_INTERFACE] = create_standard_audio_quirk,
+		[QUIRK_AUDIO_FIXED_ENDPOINT] = create_fixed_stream_quirk,
+		[QUIRK_AUDIO_EDIROL_UA700_UA25] = create_ua700_ua25_quirk,
+		[QUIRK_AUDIO_EDIROL_UA1000] = create_ua1000_quirk,
+	};
+
+	if (quirk->type < QUIRK_TYPE_COUNT) {
+		return quirk_funcs[quirk->type](chip, iface, quirk);
+	} else {
 		snd_printd(KERN_ERR "invalid quirk type %d\n", quirk->type);
 		return -ENXIO;
 	}
@@ -3003,25 +3177,25 @@ static int snd_usb_create_quirk(snd_usb_audio_t *chip,
 /*
  * common proc files to show the usb device info
  */
-static void proc_audio_usbbus_read(snd_info_entry_t *entry, snd_info_buffer_t *buffer)
+static void proc_audio_usbbus_read(struct snd_info_entry *entry, struct snd_info_buffer *buffer)
 {
-	snd_usb_audio_t *chip = entry->private_data;
+	struct snd_usb_audio *chip = entry->private_data;
 	if (! chip->shutdown)
 		snd_iprintf(buffer, "%03d/%03d\n", chip->dev->bus->busnum, chip->dev->devnum);
 }
 
-static void proc_audio_usbid_read(snd_info_entry_t *entry, snd_info_buffer_t *buffer)
+static void proc_audio_usbid_read(struct snd_info_entry *entry, struct snd_info_buffer *buffer)
 {
-	snd_usb_audio_t *chip = entry->private_data;
+	struct snd_usb_audio *chip = entry->private_data;
 	if (! chip->shutdown)
 		snd_iprintf(buffer, "%04x:%04x\n", 
-			    le16_to_cpu(chip->dev->descriptor.idVendor),
-			    le16_to_cpu(chip->dev->descriptor.idProduct));
+			    USB_ID_VENDOR(chip->usb_id),
+			    USB_ID_PRODUCT(chip->usb_id));
 }
 
-static void snd_usb_audio_create_proc(snd_usb_audio_t *chip)
+static void snd_usb_audio_create_proc(struct snd_usb_audio *chip)
 {
-	snd_info_entry_t *entry;
+	struct snd_info_entry *entry;
 	if (! snd_card_proc_new(chip->card, "usbbus", &entry))
 		snd_info_set_text_ops(entry, chip, 1024, proc_audio_usbbus_read);
 	if (! snd_card_proc_new(chip->card, "usbid", &entry))
@@ -3035,15 +3209,15 @@ static void snd_usb_audio_create_proc(snd_usb_audio_t *chip)
  *
  */
 
-static int snd_usb_audio_free(snd_usb_audio_t *chip)
+static int snd_usb_audio_free(struct snd_usb_audio *chip)
 {
 	kfree(chip);
 	return 0;
 }
 
-static int snd_usb_audio_dev_free(snd_device_t *device)
+static int snd_usb_audio_dev_free(struct snd_device *device)
 {
-	snd_usb_audio_t *chip = device->device_data;
+	struct snd_usb_audio *chip = device->device_data;
 	return snd_usb_audio_free(chip);
 }
 
@@ -3052,14 +3226,14 @@ static int snd_usb_audio_dev_free(snd_device_t *device)
  * create a chip instance and set its names.
  */
 static int snd_usb_audio_create(struct usb_device *dev, int idx,
-				const snd_usb_audio_quirk_t *quirk,
-				snd_usb_audio_t **rchip)
+				const struct snd_usb_audio_quirk *quirk,
+				struct snd_usb_audio **rchip)
 {
-	snd_card_t *card;
-	snd_usb_audio_t *chip;
+	struct snd_card *card;
+	struct snd_usb_audio *chip;
 	int err, len;
 	char component[14];
-	static snd_device_ops_t ops = {
+	static struct snd_device_ops ops = {
 		.dev_free =	snd_usb_audio_dev_free,
 	};
 
@@ -3077,7 +3251,7 @@ static int snd_usb_audio_create(struct usb_device *dev, int idx,
 		return -ENOMEM;
 	}
 
-	chip = kcalloc(1, sizeof(*chip), GFP_KERNEL);
+	chip = kzalloc(sizeof(*chip), GFP_KERNEL);
 	if (! chip) {
 		snd_card_free(card);
 		return -ENOMEM;
@@ -3086,8 +3260,11 @@ static int snd_usb_audio_create(struct usb_device *dev, int idx,
 	chip->index = idx;
 	chip->dev = dev;
 	chip->card = card;
+	chip->usb_id = USB_ID(le16_to_cpu(dev->descriptor.idVendor),
+			      le16_to_cpu(dev->descriptor.idProduct));
 	INIT_LIST_HEAD(&chip->pcm_list);
 	INIT_LIST_HEAD(&chip->midi_list);
+	INIT_LIST_HEAD(&chip->mixer_list);
 
 	if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops)) < 0) {
 		snd_usb_audio_free(chip);
@@ -3097,8 +3274,7 @@ static int snd_usb_audio_create(struct usb_device *dev, int idx,
 
 	strcpy(card->driver, "USB-Audio");
 	sprintf(component, "USB%04x:%04x",
-		le16_to_cpu(dev->descriptor.idVendor),
-		le16_to_cpu(dev->descriptor.idProduct));
+		USB_ID_VENDOR(chip->usb_id), USB_ID_PRODUCT(chip->usb_id));
 	snd_component_add(card, component);
 
 	/* retrieve the device string as shortname */
@@ -3110,8 +3286,8 @@ static int snd_usb_audio_create(struct usb_device *dev, int idx,
       			       card->shortname, sizeof(card->shortname)) <= 0) {
 			/* no name available from anywhere, so use ID */
 			sprintf(card->shortname, "USB Device %#04x:%#04x",
-				le16_to_cpu(dev->descriptor.idVendor),
-				le16_to_cpu(dev->descriptor.idProduct));
+				USB_ID_VENDOR(chip->usb_id),
+				USB_ID_PRODUCT(chip->usb_id));
 		}
 	}
 
@@ -3142,8 +3318,6 @@ static int snd_usb_audio_create(struct usb_device *dev, int idx,
 
 	snd_usb_audio_create_proc(chip);
 
-	snd_card_set_dev(card, &dev->dev);
-
 	*rchip = chip;
 	return 0;
 }
@@ -3163,26 +3337,31 @@ static void *snd_usb_audio_probe(struct usb_device *dev,
 				 struct usb_interface *intf,
 				 const struct usb_device_id *usb_id)
 {
-	struct usb_host_config *config = dev->actconfig;
-	const snd_usb_audio_quirk_t *quirk = (const snd_usb_audio_quirk_t *)usb_id->driver_info;
+	const struct snd_usb_audio_quirk *quirk = (const struct snd_usb_audio_quirk *)usb_id->driver_info;
 	int i, err;
-	snd_usb_audio_t *chip;
+	struct snd_usb_audio *chip;
 	struct usb_host_interface *alts;
 	int ifnum;
+	u32 id;
 
 	alts = &intf->altsetting[0];
 	ifnum = get_iface_desc(alts)->bInterfaceNumber;
+	id = USB_ID(le16_to_cpu(dev->descriptor.idVendor),
+		    le16_to_cpu(dev->descriptor.idProduct));
 
 	if (quirk && quirk->ifnum >= 0 && ifnum != quirk->ifnum)
 		goto __err_val;
 
 	/* SB Extigy needs special boot-up sequence */
 	/* if more models come, this will go to the quirk list. */
-	if (le16_to_cpu(dev->descriptor.idVendor) == 0x041e && 
-	    le16_to_cpu(dev->descriptor.idProduct) == 0x3000) {
+	if (id == USB_ID(0x041e, 0x3000)) {
 		if (snd_usb_extigy_boot_quirk(dev, intf) < 0)
 			goto __err_val;
-		config = dev->actconfig;
+	}
+	/* SB Audigy 2 NX needs its own boot-up magic, too */
+	if (id == USB_ID(0x041e, 0x3020)) {
+		if (snd_usb_audigy2nx_boot_quirk(dev) < 0)
+			goto __err_val;
 	}
 
 	/*
@@ -3191,7 +3370,7 @@ static void *snd_usb_audio_probe(struct usb_device *dev,
 
 	/* check whether it's already registered */
 	chip = NULL;
-	down(&register_mutex);
+	mutex_lock(&register_mutex);
 	for (i = 0; i < SNDRV_CARDS; i++) {
 		if (usb_chip[i] && usb_chip[i]->dev == dev) {
 			if (usb_chip[i]->shutdown) {
@@ -3206,18 +3385,14 @@ static void *snd_usb_audio_probe(struct usb_device *dev,
 		/* it's a fresh one.
 		 * now look for an empty slot and create a new card instance
 		 */
-		/* first, set the current configuration for this device */
-		if (usb_reset_configuration(dev) < 0) {
-			snd_printk(KERN_ERR "cannot reset configuration (value 0x%x)\n", get_cfg_desc(config)->bConfigurationValue);
-			goto __error;
-		}
 		for (i = 0; i < SNDRV_CARDS; i++)
 			if (enable[i] && ! usb_chip[i] &&
-			    (vid[i] == -1 || vid[i] == le16_to_cpu(dev->descriptor.idVendor)) &&
-			    (pid[i] == -1 || pid[i] == le16_to_cpu(dev->descriptor.idProduct))) {
+			    (vid[i] == -1 || vid[i] == USB_ID_VENDOR(id)) &&
+			    (pid[i] == -1 || pid[i] == USB_ID_PRODUCT(id))) {
 				if (snd_usb_audio_create(dev, i, quirk, &chip) < 0) {
 					goto __error;
 				}
+				snd_card_set_dev(chip->card, &intf->dev);
 				break;
 			}
 		if (! chip) {
@@ -3248,13 +3423,13 @@ static void *snd_usb_audio_probe(struct usb_device *dev,
 
 	usb_chip[chip->index] = chip;
 	chip->num_interfaces++;
-	up(&register_mutex);
+	mutex_unlock(&register_mutex);
 	return chip;
 
  __error:
 	if (chip && !chip->num_interfaces)
 		snd_card_free(chip->card);
-	up(&register_mutex);
+	mutex_unlock(&register_mutex);
  __err_val:
 	return NULL;
 }
@@ -3265,8 +3440,8 @@ static void *snd_usb_audio_probe(struct usb_device *dev,
  */
 static void snd_usb_audio_disconnect(struct usb_device *dev, void *ptr)
 {
-	snd_usb_audio_t *chip;
-	snd_card_t *card;
+	struct snd_usb_audio *chip;
+	struct snd_card *card;
 	struct list_head *p;
 
 	if (ptr == (void *)-1L)
@@ -3274,24 +3449,28 @@ static void snd_usb_audio_disconnect(struct usb_device *dev, void *ptr)
 
 	chip = ptr;
 	card = chip->card;
-	down(&register_mutex);
+	mutex_lock(&register_mutex);
 	chip->shutdown = 1;
 	chip->num_interfaces--;
 	if (chip->num_interfaces <= 0) {
 		snd_card_disconnect(card);
 		/* release the pcm resources */
 		list_for_each(p, &chip->pcm_list) {
-			snd_usb_stream_disconnect(p, &usb_audio_driver);
+			snd_usb_stream_disconnect(p);
 		}
 		/* release the midi resources */
 		list_for_each(p, &chip->midi_list) {
-			snd_usbmidi_disconnect(p, &usb_audio_driver);
+			snd_usbmidi_disconnect(p);
+		}
+		/* release mixer resources */
+		list_for_each(p, &chip->mixer_list) {
+			snd_usb_mixer_disconnect(p);
 		}
 		usb_chip[chip->index] = NULL;
-		up(&register_mutex);
+		mutex_unlock(&register_mutex);
 		snd_card_free(card);
 	} else {
-		up(&register_mutex);
+		mutex_unlock(&register_mutex);
 	}
 }