X-Git-Url: http://ftp.safe.ca/?a=blobdiff_plain;f=sound%2Fusb%2Fusbaudio.c;h=b074a594c595444994824c9384350ae3d019859d;hb=d82af9f9aab69e82b86450272588c861364f8879;hp=a1bd8040dea441a06a487ef9943a8e31997bb457;hpb=4da5cc2cec8caec1d357053e85a7a32f243f93a1;p=safe%2Fjmp%2Flinux-2.6

diff --git a/sound/usb/usbaudio.c b/sound/usb/usbaudio.c
index a1bd804..b074a59 100644
--- a/sound/usb/usbaudio.c
+++ b/sound/usb/usbaudio.c
@@ -38,7 +38,6 @@
  */
 
 
-#include <sound/driver.h>
 #include <linux/bitops.h>
 #include <linux/init.h>
 #include <linux/list.h>
@@ -47,6 +46,7 @@
 #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>
@@ -64,11 +64,14 @@ MODULE_SUPPORTED_DEVICE("{{Generic,USB Audio}}");
 
 static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;	/* Index 0-MAX */
 static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;	/* ID for this card */
-static int enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;	/* Enable this card */
-static int vid[SNDRV_CARDS] = { [0 ... (SNDRV_CARDS-1)] = -1 }; /* Vendor ID for this card */
-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 enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;/* Enable this card */
+/* Vendor/product IDs for this card */
+static int vid[SNDRV_CARDS] = { [0 ... (SNDRV_CARDS-1)] = -1 };
+static int pid[SNDRV_CARDS] = { [0 ... (SNDRV_CARDS-1)] = -1 };
+static int nrpacks = 8;		/* max. number of packets per urb */
 static int async_unlink = 1;
+static int device_setup[SNDRV_CARDS]; /* device parameter for this card*/
+static int ignore_ctl_error;
 
 module_param_array(index, int, NULL, 0444);
 MODULE_PARM_DESC(index, "Index value for the USB audio adapter.");
@@ -84,7 +87,11 @@ 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).");
+module_param(ignore_ctl_error, bool, 0444);
+MODULE_PARM_DESC(ignore_ctl_error,
+		 "Ignore errors from USB controller for mixer interfaces.");
 
 /*
  * debug the h/w constraints
@@ -96,11 +103,11 @@ MODULE_PARM_DESC(async_unlink, "Use async unlink mode.");
  *
  */
 
-#define MAX_PACKS	10
+#define MAX_PACKS	20
 #define MAX_PACKS_HS	(MAX_PACKS * 8)	/* in high speed mode */
 #define MAX_URBS	8
 #define SYNC_URBS	4	/* always four urbs for sync */
-#define MIN_PACKS_URB	1	/* minimum 1 packet per urb */
+#define MAX_QUEUE	24	/* try not to exceed this queue length, in ms */
 
 struct audioformat {
 	struct list_head list;
@@ -114,6 +121,7 @@ struct audioformat {
 	unsigned char attributes;	/* corresponding attributes of cs endpoint */
 	unsigned char endpoint;		/* endpoint */
 	unsigned char ep_attr;		/* endpoint attributes */
+	unsigned char datainterval;	/* log_2 of data packet interval */
 	unsigned int maxpacksize;	/* max. packet size */
 	unsigned int rates;		/* rate bitmasks */
 	unsigned int rate_min, rate_max;	/* min/max rates */
@@ -163,7 +171,6 @@ 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 */
 
@@ -181,6 +188,7 @@ struct snd_usb_substream {
 	u64 formats;			/* format bitmasks (all or'ed) */
 	unsigned int num_formats;		/* number of supported audio formats (list) */
 	struct list_head fmt_list;	/* format list */
+	struct snd_pcm_hw_constraint_list rate_list;	/* limited rates */
 	spinlock_t lock;
 
 	struct snd_urb_ops ops;		/* callbacks (must be filled at init) */
@@ -202,7 +210,7 @@ struct snd_usb_stream {
  * the all interfaces on the same card as one sound device.
  */
 
-static DECLARE_MUTEX(register_mutex);
+static DEFINE_MUTEX(register_mutex);
 static struct snd_usb_audio *usb_chip[SNDRV_CARDS];
 
 
@@ -248,7 +256,7 @@ static int prepare_capture_sync_urb(struct snd_usb_substream *subs,
 				    struct urb *urb)
 {
 	unsigned char *cp = urb->transfer_buffer;
-	struct snd_urb_ctx *ctx = (struct snd_urb_ctx *)urb->context;
+	struct snd_urb_ctx *ctx = urb->context;
 
 	urb->dev = ctx->subs->dev; /* we need to set this at each time */
 	urb->iso_frame_desc[0].length = 3;
@@ -270,7 +278,7 @@ static int prepare_capture_sync_urb_hs(struct snd_usb_substream *subs,
 				       struct urb *urb)
 {
 	unsigned char *cp = urb->transfer_buffer;
-	struct snd_urb_ctx *ctx = (struct snd_urb_ctx *)urb->context;
+	struct snd_urb_ctx *ctx = urb->context;
 
 	urb->dev = ctx->subs->dev; /* we need to set this at each time */
 	urb->iso_frame_desc[0].length = 4;
@@ -308,7 +316,7 @@ static int prepare_capture_urb(struct snd_usb_substream *subs,
 			       struct urb *urb)
 {
 	int i, offs;
-	struct snd_urb_ctx *ctx = (struct snd_urb_ctx *)urb->context;
+	struct snd_urb_ctx *ctx = urb->context;
 
 	offs = 0;
 	urb->dev = ctx->subs->dev; /* we need to set this at each time */
@@ -319,16 +327,6 @@ static int prepare_capture_urb(struct snd_usb_substream *subs,
 	}
 	urb->transfer_buffer_length = offs;
 	urb->number_of_packets = ctx->packets;
-#if 0 // for check
-	if (! urb->bandwidth) {
-		int bustime;
-		bustime = usb_check_bandwidth(urb->dev, urb);
-		if (bustime < 0)
-			return bustime;
-		printk("urb %d: bandwidth = %d (packets = %d)\n", ctx->index, bustime, urb->number_of_packets);
-		usb_claim_bandwidth(urb->dev, urb, bustime, 1);
-	}
-#endif // for check
 	return 0;
 }
 
@@ -386,6 +384,16 @@ static int retire_capture_urb(struct snd_usb_substream *subs,
 	return 0;
 }
 
+/*
+ * Process after capture complete when paused.  Nothing to do.
+ */
+static int retire_paused_capture_urb(struct snd_usb_substream *subs,
+				     struct snd_pcm_runtime *runtime,
+				     struct urb *urb)
+{
+	return 0;
+}
+
 
 /*
  * prepare urb for full speed playback sync pipe
@@ -397,7 +405,7 @@ static int prepare_playback_sync_urb(struct snd_usb_substream *subs,
 				     struct snd_pcm_runtime *runtime,
 				     struct urb *urb)
 {
-	struct snd_urb_ctx *ctx = (struct snd_urb_ctx *)urb->context;
+	struct snd_urb_ctx *ctx = urb->context;
 
 	urb->dev = ctx->subs->dev; /* we need to set this at each time */
 	urb->iso_frame_desc[0].length = 3;
@@ -415,7 +423,7 @@ static int prepare_playback_sync_urb_hs(struct snd_usb_substream *subs,
 					struct snd_pcm_runtime *runtime,
 					struct urb *urb)
 {
-	struct snd_urb_ctx *ctx = (struct snd_urb_ctx *)urb->context;
+	struct snd_urb_ctx *ctx = urb->context;
 
 	urb->dev = ctx->subs->dev; /* we need to set this at each time */
 	urb->iso_frame_desc[0].length = 4;
@@ -476,24 +484,70 @@ static int retire_playback_sync_urb_hs(struct snd_usb_substream *subs,
 }
 
 /*
- * Prepare urb for streaming before playback starts.
+ * process after E-Mu 0202/0404/Tracker Pre high speed playback sync complete
  *
- * We don't care about (or have) any data, so we just send a transfer delimiter.
+ * These devices return the number of samples per packet instead of the number
+ * of samples per microframe.
  */
-static int prepare_startup_playback_urb(struct snd_usb_substream *subs,
-					struct snd_pcm_runtime *runtime,
-					struct urb *urb)
+static int retire_playback_sync_urb_hs_emu(struct snd_usb_substream *subs,
+					   struct snd_pcm_runtime *runtime,
+					   struct urb *urb)
 {
-	unsigned int i;
+	unsigned int f;
+	unsigned long flags;
+
+	if (urb->iso_frame_desc[0].status == 0 &&
+	    urb->iso_frame_desc[0].actual_length == 4) {
+		f = combine_quad((u8*)urb->transfer_buffer) & 0x0fffffff;
+		f >>= subs->datainterval;
+		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);
+		}
+	}
+
+	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 or when paused.
+ *
+ * We don't have any data, so we send silence.
+ */
+static int prepare_nodata_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) {
-		urb->iso_frame_desc[i].offset = 0;
-		urb->iso_frame_desc[i].length = 0;
+	for (i = 0; i < ctx->packets; ++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 = 0;
+	urb->number_of_packets = ctx->packets;
+	urb->transfer_buffer_length = offs * stride;
+	memset(urb->transfer_buffer,
+	       subs->cur_audiofmt->format == SNDRV_PCM_FORMAT_U8 ? 0x80 : 0,
+	       offs * stride);
 	return 0;
 }
 
@@ -513,7 +567,7 @@ static int prepare_playback_urb(struct snd_usb_substream *subs,
 	unsigned int counts;
 	unsigned long flags;
 	int period_elapsed = 0;
-	struct snd_urb_ctx *ctx = (struct snd_urb_ctx *)urb->context;
+	struct snd_urb_ctx *ctx = urb->context;
 
 	stride = runtime->frame_bits >> 3;
 
@@ -522,16 +576,7 @@ static int prepare_playback_urb(struct snd_usb_substream *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 << subs->datainterval);
-			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;
@@ -562,9 +607,7 @@ static int prepare_playback_urb(struct snd_usb_substream *subs,
 				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)
+		if (period_elapsed) /* finish at the period boundary */
 			break;
 	}
 	if (subs->hwptr_done + offs > runtime->buffer_size) {
@@ -584,6 +627,7 @@ static int prepare_playback_urb(struct snd_usb_substream *subs,
 	subs->hwptr_done += offs;
 	if (subs->hwptr_done >= runtime->buffer_size)
 		subs->hwptr_done -= runtime->buffer_size;
+	runtime->delay += offs;
 	spin_unlock_irqrestore(&subs->lock, flags);
 	urb->transfer_buffer_length = offs * stride;
 	if (period_elapsed)
@@ -593,12 +637,22 @@ static int prepare_playback_urb(struct snd_usb_substream *subs,
 
 /*
  * process after playback data complete
- * - nothing to do
+ * - decrease the delay count again
  */
 static int retire_playback_urb(struct snd_usb_substream *subs,
 			       struct snd_pcm_runtime *runtime,
 			       struct urb *urb)
 {
+	unsigned long flags;
+	int stride = runtime->frame_bits >> 3;
+	int processed = urb->transfer_buffer_length / stride;
+
+	spin_lock_irqsave(&subs->lock, flags);
+	if (processed > runtime->delay)
+		runtime->delay = 0;
+	else
+		runtime->delay -= processed;
+	spin_unlock_irqrestore(&subs->lock, flags);
 	return 0;
 }
 
@@ -607,7 +661,7 @@ static int retire_playback_urb(struct snd_usb_substream *subs,
  */
 static struct snd_urb_ops audio_urb_ops[2] = {
 	{
-		.prepare =	prepare_startup_playback_urb,
+		.prepare =	prepare_nodata_playback_urb,
 		.retire =	retire_playback_urb,
 		.prepare_sync =	prepare_playback_sync_urb,
 		.retire_sync =	retire_playback_sync_urb,
@@ -622,7 +676,7 @@ static struct snd_urb_ops audio_urb_ops[2] = {
 
 static struct snd_urb_ops audio_urb_ops_high_speed[2] = {
 	{
-		.prepare =	prepare_startup_playback_urb,
+		.prepare =	prepare_nodata_playback_urb,
 		.retire =	retire_playback_urb,
 		.prepare_sync =	prepare_playback_sync_urb_hs,
 		.retire_sync =	retire_playback_sync_urb_hs,
@@ -638,15 +692,15 @@ static struct snd_urb_ops audio_urb_ops_high_speed[2] = {
 /*
  * complete callback from data urb
  */
-static void snd_complete_urb(struct urb *urb, struct pt_regs *regs)
+static void snd_complete_urb(struct urb *urb)
 {
-	struct snd_urb_ctx *ctx = (struct snd_urb_ctx *)urb->context;
+	struct snd_urb_ctx *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)) ||
-	    ! subs->running || /* can be stopped during retire callback */
+	    !subs->running || /* can be stopped during retire callback */
 	    (err = subs->ops.prepare(subs, substream->runtime, urb)) < 0 ||
 	    (err = usb_submit_urb(urb, GFP_ATOMIC)) < 0) {
 		clear_bit(ctx->index, &subs->active_mask);
@@ -661,15 +715,15 @@ static void snd_complete_urb(struct urb *urb, struct pt_regs *regs)
 /*
  * complete callback from sync urb
  */
-static void snd_complete_sync_urb(struct urb *urb, struct pt_regs *regs)
+static void snd_complete_sync_urb(struct urb *urb)
 {
-	struct snd_urb_ctx *ctx = (struct snd_urb_ctx *)urb->context;
+	struct snd_urb_ctx *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)) ||
-	    ! subs->running || /* can be stopped during retire callback */
+	    !subs->running || /* can be stopped during retire callback */
 	    (err = subs->ops.prepare_sync(subs, substream->runtime, urb)) < 0 ||
 	    (err = usb_submit_urb(urb, GFP_ATOMIC)) < 0) {
 		clear_bit(ctx->index + 16, &subs->active_mask);
@@ -699,7 +753,7 @@ static int snd_pcm_alloc_vmalloc_buffer(struct snd_pcm_substream *subs, size_t s
 		vfree(runtime->dma_area);
 	}
 	runtime->dma_area = vmalloc(size);
-	if (! runtime->dma_area)
+	if (!runtime->dma_area)
 		return -ENOMEM;
 	runtime->dma_bytes = size;
 	return 0;
@@ -709,10 +763,9 @@ static int snd_pcm_alloc_vmalloc_buffer(struct snd_pcm_substream *subs, size_t s
 static int snd_pcm_free_vmalloc_buffer(struct snd_pcm_substream *subs)
 {
 	struct snd_pcm_runtime *runtime = subs->runtime;
-	if (runtime->dma_area) {
-		vfree(runtime->dma_area);
-		runtime->dma_area = NULL;
-	}
+
+	vfree(runtime->dma_area);
+	runtime->dma_area = NULL;
 	return 0;
 }
 
@@ -732,12 +785,12 @@ static int deactivate_urbs(struct snd_usb_substream *subs, int force, int can_sl
 
 	async = !can_sleep && async_unlink;
 
-	if (! async && in_interrupt())
+	if (!async && in_interrupt())
 		return 0;
 
 	for (i = 0; i < subs->nurbs; i++) {
 		if (test_bit(i, &subs->active_mask)) {
-			if (! test_and_set_bit(i, &subs->unlink_mask)) {
+			if (!test_and_set_bit(i, &subs->unlink_mask)) {
 				struct urb *u = subs->dataurb[i].urb;
 				if (async)
 					usb_unlink_urb(u);
@@ -749,7 +802,7 @@ static int deactivate_urbs(struct snd_usb_substream *subs, int force, int can_sl
 	if (subs->syncpipe) {
 		for (i = 0; i < SYNC_URBS; i++) {
 			if (test_bit(i+16, &subs->active_mask)) {
- 				if (! test_and_set_bit(i+16, &subs->unlink_mask)) {
+				if (!test_and_set_bit(i+16, &subs->unlink_mask)) {
 					struct urb *u = subs->syncurb[i].urb;
 					if (async)
 						usb_unlink_urb(u);
@@ -763,6 +816,31 @@ static int deactivate_urbs(struct snd_usb_substream *subs, int force, int can_sl
 }
 
 
+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";
+	case -EINVAL:
+	case -EAGAIN:
+	case -EFBIG:
+	case -EMSGSIZE:
+		return "internal error";
+	default:
+		return "unknown error";
+	}
+}
+
 /*
  * set up and start data/sync urbs
  */
@@ -775,7 +853,8 @@ static int start_urbs(struct snd_usb_substream *subs, struct snd_pcm_runtime *ru
 		return -EBADFD;
 
 	for (i = 0; i < subs->nurbs; i++) {
-		snd_assert(subs->dataurb[i].urb, return -EINVAL);
+		if (snd_BUG_ON(!subs->dataurb[i].urb))
+			return -EINVAL;
 		if (subs->ops.prepare(subs, runtime, subs->dataurb[i].urb) < 0) {
 			snd_printk(KERN_ERR "cannot prepare datapipe for urb %d\n", i);
 			goto __error;
@@ -783,7 +862,8 @@ static int start_urbs(struct snd_usb_substream *subs, struct snd_pcm_runtime *ru
 	}
 	if (subs->syncpipe) {
 		for (i = 0; i < SYNC_URBS; i++) {
-			snd_assert(subs->syncurb[i].urb, return -EINVAL);
+			if (snd_BUG_ON(!subs->syncurb[i].urb))
+				return -EINVAL;
 			if (subs->ops.prepare_sync(subs, runtime, subs->syncurb[i].urb) < 0) {
 				snd_printk(KERN_ERR "cannot prepare syncpipe for urb %d\n", i);
 				goto __error;
@@ -795,16 +875,22 @@ static int start_urbs(struct snd_usb_substream *subs, struct snd_pcm_runtime *ru
 	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);
@@ -876,10 +962,14 @@ static int snd_usb_pcm_playback_trigger(struct snd_pcm_substream *substream,
 
 	switch (cmd) {
 	case SNDRV_PCM_TRIGGER_START:
+	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
 		subs->ops.prepare = prepare_playback_urb;
 		return 0;
 	case SNDRV_PCM_TRIGGER_STOP:
 		return deactivate_urbs(subs, 0, 0);
+	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
+		subs->ops.prepare = prepare_nodata_playback_urb;
+		return 0;
 	default:
 		return -EINVAL;
 	}
@@ -895,9 +985,16 @@ static int snd_usb_pcm_capture_trigger(struct snd_pcm_substream *substream,
 
 	switch (cmd) {
 	case SNDRV_PCM_TRIGGER_START:
+		subs->ops.retire = retire_capture_urb;
 		return start_urbs(subs, substream->runtime);
 	case SNDRV_PCM_TRIGGER_STOP:
 		return deactivate_urbs(subs, 0, 0);
+	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
+		subs->ops.retire = retire_paused_capture_urb;
+		return 0;
+	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
+		subs->ops.retire = retire_capture_urb;
+		return 0;
 	default:
 		return -EINVAL;
 	}
@@ -946,9 +1043,9 @@ static void release_substream_urbs(struct snd_usb_substream *subs, int force)
 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;
+	unsigned int maxsize, i;
 	int is_playback = subs->direction == SNDRV_PCM_STREAM_PLAYBACK;
-	unsigned int npacks[MAX_URBS], urb_packs, total_packs, packs_per_ms;
+	unsigned int urb_packs, total_packs, packs_per_ms;
 
 	/* calculate the frequency in 16.16 format */
 	if (snd_usb_get_speed(subs->dev) == USB_SPEED_FULL)
@@ -979,19 +1076,19 @@ static int init_substream_urbs(struct snd_usb_substream *subs, unsigned int peri
 		packs_per_ms = 8 >> subs->datainterval;
 	else
 		packs_per_ms = 1;
-	subs->packs_per_ms = packs_per_ms;
 
 	if (is_playback) {
-		urb_packs = nrpacks;
-		urb_packs = max(urb_packs, (unsigned int)MIN_PACKS_URB);
+		urb_packs = max(nrpacks, 1);
 		urb_packs = min(urb_packs, (unsigned int)MAX_PACKS);
 	} else
 		urb_packs = 1;
 	urb_packs *= packs_per_ms;
+	if (subs->syncpipe)
+		urb_packs = min(urb_packs, 1U << subs->syncinterval);
 
 	/* decide how many packets to be used */
 	if (is_playback) {
-		unsigned int minsize;
+		unsigned int minsize, maxpacks;
 		/* determine how small a packet can be */
 		minsize = (subs->freqn >> (16 - subs->datainterval))
 			  * (frame_bits >> 3);
@@ -1000,13 +1097,17 @@ static int init_substream_urbs(struct snd_usb_substream *subs, unsigned int peri
 			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;
+		if (total_packs < 2) {
+			total_packs = 2;
+		} else {
+			/* and we don't want too long a queue either */
+			maxpacks = max(MAX_QUEUE * packs_per_ms, urb_packs * 2);
+			total_packs = min(total_packs, maxpacks);
+		}
 	} else {
+		while (urb_packs > 1 && urb_packs * maxsize >= period_bytes)
+			urb_packs >>= 1;
 		total_packs = MAX_URBS * urb_packs;
 	}
 	subs->nurbs = (total_packs + urb_packs - 1) / urb_packs;
@@ -1014,31 +1115,11 @@ static int init_substream_urbs(struct snd_usb_substream *subs, unsigned int peri
 		/* too much... */
 		subs->nurbs = MAX_URBS;
 		total_packs = MAX_URBS * urb_packs;
-	}
-	n = total_packs;
-	for (i = 0; i < subs->nurbs; i++) {
-		npacks[i] = n > urb_packs ? urb_packs : n;
-		n -= urb_packs;
-	}
-	if (subs->nurbs <= 1) {
+	} else if (subs->nurbs < 2) {
 		/* too little - we need at least two packets
 		 * to ensure contiguous playback/capture
 		 */
 		subs->nurbs = 2;
-		npacks[0] = (total_packs + 1) / 2;
-		npacks[1] = total_packs - npacks[0];
-	} 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 */
-			npacks[0] += npacks[subs->nurbs - 1];
-			subs->nurbs--;
-		} else {
-			/* divide to two */
-			subs->nurbs = 2;
-			npacks[0] = (total_packs + 1) / 2;
-			npacks[1] = total_packs - npacks[0];
-		}
 	}
 
 	/* allocate and initialize data urbs */
@@ -1046,17 +1127,18 @@ static int init_substream_urbs(struct snd_usb_substream *subs, unsigned int peri
 		struct snd_urb_ctx *u = &subs->dataurb[i];
 		u->index = i;
 		u->subs = subs;
-		u->packets = npacks[i];
+		u->packets = (i + 1) * total_packs / subs->nurbs
+			- i * total_packs / subs->nurbs;
 		u->buffer_size = maxsize * u->packets;
 		if (subs->fmt_type == USB_FORMAT_TYPE_II)
 			u->packets++; /* for transfer delimiter */
 		u->urb = usb_alloc_urb(u->packets, GFP_KERNEL);
-		if (! u->urb)
+		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)
+		if (!u->urb->transfer_buffer)
 			goto out_of_memory;
 		u->urb->pipe = subs->datapipe;
 		u->urb->transfer_flags = URB_ISO_ASAP | URB_NO_TRANSFER_DMA_MAP;
@@ -1069,7 +1151,7 @@ static int init_substream_urbs(struct snd_usb_substream *subs, unsigned int peri
 		/* allocate and initialize sync urbs */
 		subs->syncbuf = usb_buffer_alloc(subs->dev, SYNC_URBS * 4,
 						 GFP_KERNEL, &subs->sync_dma);
-		if (! subs->syncbuf)
+		if (!subs->syncbuf)
 			goto out_of_memory;
 		for (i = 0; i < SYNC_URBS; i++) {
 			struct snd_urb_ctx *u = &subs->syncurb[i];
@@ -1077,7 +1159,7 @@ static int init_substream_urbs(struct snd_usb_substream *subs, unsigned int peri
 			u->subs = subs;
 			u->packets = 1;
 			u->urb = usb_alloc_urb(1, GFP_KERNEL);
-			if (! u->urb)
+			if (!u->urb)
 				goto out_of_memory;
 			u->urb->transfer_buffer = subs->syncbuf + i * 4;
 			u->urb->transfer_dma = subs->sync_dma + i * 4;
@@ -1204,14 +1286,14 @@ static int init_usb_sample_rate(struct usb_device *dev, int iface,
 		if ((err = snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), SET_CUR,
 					   USB_TYPE_CLASS|USB_RECIP_ENDPOINT|USB_DIR_OUT,
 					   SAMPLING_FREQ_CONTROL << 8, ep, data, 3, 1000)) < 0) {
-			snd_printk(KERN_ERR "%d:%d:%d: cannot set freq %d to ep 0x%x\n",
+			snd_printk(KERN_ERR "%d:%d:%d: cannot set freq %d to ep %#x\n",
 				   dev->devnum, iface, fmt->altsetting, rate, ep);
 			return err;
 		}
 		if ((err = snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0), GET_CUR,
 					   USB_TYPE_CLASS|USB_RECIP_ENDPOINT|USB_DIR_IN,
 					   SAMPLING_FREQ_CONTROL << 8, ep, data, 3, 1000)) < 0) {
-			snd_printk(KERN_WARNING "%d:%d:%d: cannot get freq at ep 0x%x\n",
+			snd_printk(KERN_WARNING "%d:%d:%d: cannot get freq at ep %#x\n",
 				   dev->devnum, iface, fmt->altsetting, ep);
 			return 0; /* some devices don't support reading */
 		}
@@ -1238,17 +1320,23 @@ static int set_format(struct snd_usb_substream *subs, struct audioformat *fmt)
 	int err;
 
 	iface = usb_ifnum_to_if(dev, fmt->iface);
-	snd_assert(iface, return -EINVAL);
+	if (WARN_ON(!iface))
+		return -EINVAL;
 	alts = &iface->altsetting[fmt->altset_idx];
 	altsd = get_iface_desc(alts);
-	snd_assert(altsd->bAlternateSetting == fmt->altsetting, return -EINVAL);
+	if (WARN_ON(altsd->bAlternateSetting != fmt->altsetting))
+		return -EINVAL;
 
 	if (fmt == subs->cur_audiofmt)
 		return 0;
 
 	/* close the old interface */
 	if (subs->interface >= 0 && subs->interface != fmt->iface) {
-		usb_set_interface(subs->dev, subs->interface, 0);
+		if (usb_set_interface(subs->dev, subs->interface, 0) < 0) {
+			snd_printk(KERN_ERR "%d:%d:%d: return to setting 0 failed\n",
+				dev->devnum, fmt->iface, fmt->altsetting);
+			return -EIO;
+		}
 		subs->interface = -1;
 		subs->format = 0;
 	}
@@ -1271,12 +1359,7 @@ static int set_format(struct snd_usb_substream *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->datainterval = fmt->datainterval;
 	subs->syncpipe = subs->syncinterval = 0;
 	subs->maxpacksize = fmt->maxpacksize;
 	subs->fill_max = 0;
@@ -1337,9 +1420,11 @@ static int set_format(struct snd_usb_substream *subs, struct audioformat *fmt)
 	subs->cur_audiofmt = fmt;
 
 #if 0
-	printk("setting done: format = %d, rate = %d, channels = %d\n",
-	       fmt->format, fmt->rate, fmt->channels);
-	printk("  datapipe = 0x%0x, syncpipe = 0x%0x\n",
+	printk(KERN_DEBUG
+	       "setting done: format = %d, rate = %d..%d, channels = %d\n",
+	       fmt->format, fmt->rate_min, fmt->rate_max, fmt->channels);
+	printk(KERN_DEBUG
+	       "  datapipe = 0x%0x, syncpipe = 0x%0x\n",
 	       subs->datapipe, subs->syncpipe);
 #endif
 
@@ -1359,7 +1444,7 @@ static int set_format(struct snd_usb_substream *subs, struct audioformat *fmt)
 static int snd_usb_hw_params(struct snd_pcm_substream *substream,
 			     struct snd_pcm_hw_params *hw_params)
 {
-	struct snd_usb_substream *subs = (struct snd_usb_substream *)substream->runtime->private_data;
+	struct snd_usb_substream *subs = substream->runtime->private_data;
 	struct audioformat *fmt;
 	unsigned int channels, rate, format;
 	int ret, changed;
@@ -1373,9 +1458,9 @@ static int snd_usb_hw_params(struct snd_pcm_substream *substream,
 	rate = params_rate(hw_params);
 	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);
+	if (!fmt) {
+		snd_printd(KERN_DEBUG "cannot set format: format = %#x, rate = %d, channels = %d\n",
+			   format, rate, channels);
 		return -EINVAL;
 	}
 
@@ -1415,12 +1500,13 @@ static int snd_usb_hw_params(struct snd_pcm_substream *substream,
  */
 static int snd_usb_hw_free(struct snd_pcm_substream *substream)
 {
-	struct snd_usb_substream *subs = (struct snd_usb_substream *)substream->runtime->private_data;
+	struct snd_usb_substream *subs = substream->runtime->private_data;
 
 	subs->cur_audiofmt = NULL;
 	subs->cur_rate = 0;
 	subs->period_bytes = 0;
-	release_substream_urbs(subs, 0);
+	if (!subs->stream->chip->shutdown)
+		release_substream_urbs(subs, 0);
 	return snd_pcm_free_vmalloc_buffer(substream);
 }
 
@@ -1447,6 +1533,7 @@ static int snd_usb_pcm_prepare(struct snd_pcm_substream *substream)
 	subs->hwptr_done = 0;
 	subs->transfer_done = 0;
 	subs->phase = 0;
+	runtime->delay = 0;
 
 	/* clear urbs (to be sure) */
 	deactivate_urbs(subs, 0, 1);
@@ -1455,33 +1542,20 @@ static int snd_usb_pcm_prepare(struct snd_pcm_substream *substream)
 	/* 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;
+		subs->ops.prepare = prepare_nodata_playback_urb;
 		return start_urbs(subs, runtime);
 	} else
 		return 0;
 }
 
-static struct snd_pcm_hardware snd_usb_playback =
-{
-	.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 =	512 * 1024,
-	.periods_min =		2,
-	.periods_max =		1024,
-};
-
-static struct snd_pcm_hardware snd_usb_capture =
+static struct snd_pcm_hardware snd_usb_hardware =
 {
 	.info =			SNDRV_PCM_INFO_MMAP |
 				SNDRV_PCM_INFO_MMAP_VALID |
 				SNDRV_PCM_INFO_BATCH |
 				SNDRV_PCM_INFO_INTERLEAVED |
-				SNDRV_PCM_INFO_BLOCK_TRANSFER,
+				SNDRV_PCM_INFO_BLOCK_TRANSFER |
+				SNDRV_PCM_INFO_PAUSE,
 	.buffer_bytes_max =	1024 * 1024,
 	.period_bytes_min =	64,
 	.period_bytes_max =	512 * 1024,
@@ -1499,14 +1573,18 @@ static struct snd_pcm_hardware snd_usb_capture =
 #define hwc_debug(fmt, args...) /**/
 #endif
 
-static int hw_check_valid_format(struct snd_pcm_hw_params *params, struct audioformat *fp)
+static int hw_check_valid_format(struct snd_usb_substream *subs,
+				 struct snd_pcm_hw_params *params,
+				 struct audioformat *fp)
 {
 	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);
+	struct snd_interval *pt = hw_param_interval(params, SNDRV_PCM_HW_PARAM_PERIOD_TIME);
+	unsigned int ptime;
 
 	/* check the format */
-	if (! snd_mask_test(fmts, fp->format)) {
+	if (!snd_mask_test(fmts, fp->format)) {
 		hwc_debug("   > check: no supported format %d\n", fp->format);
 		return 0;
 	}
@@ -1524,6 +1602,14 @@ static int hw_check_valid_format(struct snd_pcm_hw_params *params, struct audiof
 		hwc_debug("   > check: rate_max %d < min %d\n", fp->rate_max, it->min);
 		return 0;
 	}
+	/* check whether the period time is >= the data packet interval */
+	if (snd_usb_get_speed(subs->dev) == USB_SPEED_HIGH) {
+		ptime = 125 * (1 << fp->datainterval);
+		if (ptime > pt->max || (ptime == pt->max && pt->openmax)) {
+			hwc_debug("   > check: ptime %u > max %u\n", ptime, pt->max);
+			return 0;
+		}
+	}
 	return 1;
 }
 
@@ -1542,7 +1628,7 @@ static int hw_rule_rate(struct snd_pcm_hw_params *params,
 	list_for_each(p, &subs->fmt_list) {
 		struct audioformat *fp;
 		fp = list_entry(p, struct audioformat, list);
-		if (! hw_check_valid_format(params, fp))
+		if (!hw_check_valid_format(subs, params, fp))
 			continue;
 		if (changed++) {
 			if (rmin > fp->rate_min)
@@ -1555,7 +1641,7 @@ static int hw_rule_rate(struct snd_pcm_hw_params *params,
 		}
 	}
 
-	if (! changed) {
+	if (!changed) {
 		hwc_debug("  --> get empty\n");
 		it->empty = 1;
 		return -EINVAL;
@@ -1596,7 +1682,7 @@ static int hw_rule_channels(struct snd_pcm_hw_params *params,
 	list_for_each(p, &subs->fmt_list) {
 		struct audioformat *fp;
 		fp = list_entry(p, struct audioformat, list);
-		if (! hw_check_valid_format(params, fp))
+		if (!hw_check_valid_format(subs, params, fp))
 			continue;
 		if (changed++) {
 			if (rmin > fp->channels)
@@ -1609,7 +1695,7 @@ static int hw_rule_channels(struct snd_pcm_hw_params *params,
 		}
 	}
 
-	if (! changed) {
+	if (!changed) {
 		hwc_debug("  --> get empty\n");
 		it->empty = 1;
 		return -EINVAL;
@@ -1649,7 +1735,7 @@ static int hw_rule_format(struct snd_pcm_hw_params *params,
 	list_for_each(p, &subs->fmt_list) {
 		struct audioformat *fp;
 		fp = list_entry(p, struct audioformat, list);
-		if (! hw_check_valid_format(params, fp))
+		if (!hw_check_valid_format(subs, params, fp))
 			continue;
 		fbits |= (1ULL << fp->format);
 	}
@@ -1658,7 +1744,7 @@ static int hw_rule_format(struct snd_pcm_hw_params *params,
 	oldbits[1] = fmt->bits[1];
 	fmt->bits[0] &= (u32)fbits;
 	fmt->bits[1] &= (u32)(fbits >> 32);
-	if (! fmt->bits[0] && ! fmt->bits[1]) {
+	if (!fmt->bits[0] && !fmt->bits[1]) {
 		hwc_debug("  --> get empty\n");
 		return -EINVAL;
 	}
@@ -1667,88 +1753,79 @@ static int hw_rule_format(struct snd_pcm_hw_params *params,
 	return changed;
 }
 
-#define MAX_MASK	64
+static int hw_rule_period_time(struct snd_pcm_hw_params *params,
+			       struct snd_pcm_hw_rule *rule)
+{
+	struct snd_usb_substream *subs = rule->private;
+	struct audioformat *fp;
+	struct snd_interval *it;
+	unsigned char min_datainterval;
+	unsigned int pmin;
+	int changed;
+
+	it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_PERIOD_TIME);
+	hwc_debug("hw_rule_period_time: (%u,%u)\n", it->min, it->max);
+	min_datainterval = 0xff;
+	list_for_each_entry(fp, &subs->fmt_list, list) {
+		if (!hw_check_valid_format(subs, params, fp))
+			continue;
+		min_datainterval = min(min_datainterval, fp->datainterval);
+	}
+	if (min_datainterval == 0xff) {
+		hwc_debug("  --> get emtpy\n");
+		it->empty = 1;
+		return -EINVAL;
+	}
+	pmin = 125 * (1 << min_datainterval);
+	changed = 0;
+	if (it->min < pmin) {
+		it->min = pmin;
+		it->openmin = 0;
+		changed = 1;
+	}
+	if (snd_interval_checkempty(it)) {
+		it->empty = 1;
+		return -EINVAL;
+	}
+	hwc_debug("  --> (%u,%u) (changed = %d)\n", it->min, it->max, changed);
+	return changed;
+}
 
 /*
- * check whether the registered audio formats need special hw-constraints
+ *  If the device supports unusual bit rates, does the request meet these?
  */
-static int check_hw_params_convention(struct snd_usb_substream *subs)
+static int snd_usb_pcm_check_knot(struct snd_pcm_runtime *runtime,
+				  struct snd_usb_substream *subs)
 {
-	int i;
-	u32 *channels;
-	u32 *rates;
-	u32 cmaster, rmaster;
-	u32 rate_min = 0, rate_max = 0;
-	struct list_head *p;
-	int err = 1;
-
-	channels = kcalloc(MAX_MASK, sizeof(u32), GFP_KERNEL);
-	rates = kcalloc(MAX_MASK, sizeof(u32), GFP_KERNEL);
+	struct audioformat *fp;
+	int count = 0, needs_knot = 0;
+	int err;
 
-	list_for_each(p, &subs->fmt_list) {
-		struct audioformat *f;
-		f = list_entry(p, struct audioformat, list);
-		/* unconventional channels? */
-		if (f->channels > 32)
-			goto __out;
-		/* continuous rate min/max matches? */
-		if (f->rates & SNDRV_PCM_RATE_CONTINUOUS) {
-			if (rate_min && f->rate_min != rate_min)
-				goto __out;
-			if (rate_max && f->rate_max != rate_max)
-				goto __out;
-			rate_min = f->rate_min;
-			rate_max = f->rate_max;
-		}
-		/* combination of continuous rates and fixed rates? */
-		if (rates[f->format] & SNDRV_PCM_RATE_CONTINUOUS) {
-			if (f->rates != rates[f->format])
-				goto __out;
-		}
-		if (f->rates & SNDRV_PCM_RATE_CONTINUOUS) {
-			if (rates[f->format] && rates[f->format] != f->rates)
-				goto __out;
-		}
-		channels[f->format] |= (1 << f->channels);
-		rates[f->format] |= f->rates;
-	}
-	/* check whether channels and rates match for all formats */
-	cmaster = rmaster = 0;
-	for (i = 0; i < MAX_MASK; i++) {
-		if (cmaster != channels[i] && cmaster && channels[i])
-			goto __out;
-		if (rmaster != rates[i] && rmaster && rates[i])
-			goto __out;
-		if (channels[i])
-			cmaster = channels[i];
-		if (rates[i])
-			rmaster = rates[i];
-	}
-	/* check whether channels match for all distinct rates */
-	memset(channels, 0, MAX_MASK * sizeof(u32));
-	list_for_each(p, &subs->fmt_list) {
-		struct audioformat *f;
-		f = list_entry(p, struct audioformat, list);
-		if (f->rates & SNDRV_PCM_RATE_CONTINUOUS)
-			continue;
-		for (i = 0; i < 32; i++) {
-			if (f->rates & (1 << i))
-				channels[i] |= (1 << f->channels);
-		}
-	}
-	cmaster = 0;
-	for (i = 0; i < 32; i++) {
-		if (cmaster != channels[i] && cmaster && channels[i])
-			goto __out;
-		if (channels[i])
-			cmaster = channels[i];
+	list_for_each_entry(fp, &subs->fmt_list, list) {
+		if (fp->rates & SNDRV_PCM_RATE_CONTINUOUS)
+			return 0;
+		count += fp->nr_rates;
+		if (fp->rates & SNDRV_PCM_RATE_KNOT)
+			needs_knot = 1;
 	}
-	err = 0;
+	if (!needs_knot)
+		return 0;
 
- __out:
-	kfree(channels);
-	kfree(rates);
-	return err;
+	subs->rate_list.count = count;
+	subs->rate_list.list = kmalloc(sizeof(int) * count, GFP_KERNEL);
+	subs->rate_list.mask = 0;
+	count = 0;
+	list_for_each_entry(fp, &subs->fmt_list, list) {
+		int i;
+		for (i = 0; i < fp->nr_rates; i++)
+			subs->rate_list.list[count++] = fp->rate_table[i];
+	}
+	err = snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
+					 &subs->rate_list);
+	if (err < 0)
+		return err;
+
+	return 0;
 }
 
 
@@ -1759,6 +1836,8 @@ static int check_hw_params_convention(struct snd_usb_substream *subs)
 static int setup_hw_info(struct snd_pcm_runtime *runtime, struct snd_usb_substream *subs)
 {
 	struct list_head *p;
+	unsigned int pt, ptmin;
+	int param_period_time_if_needed;
 	int err;
 
 	runtime->hw.formats = subs->formats;
@@ -1768,6 +1847,7 @@ static int setup_hw_info(struct snd_pcm_runtime *runtime, struct snd_usb_substre
 	runtime->hw.channels_min = 256;
 	runtime->hw.channels_max = 0;
 	runtime->hw.rates = 0;
+	ptmin = UINT_MAX;
 	/* check min/max rates and channels */
 	list_for_each(p, &subs->fmt_list) {
 		struct audioformat *fp;
@@ -1786,39 +1866,58 @@ static int setup_hw_info(struct snd_pcm_runtime *runtime, struct snd_usb_substre
 			runtime->hw.period_bytes_min = runtime->hw.period_bytes_max =
 				fp->frame_size;
 		}
+		pt = 125 * (1 << fp->datainterval);
+		ptmin = min(ptmin, pt);
 	}
 
-	/* set the period time minimum 1ms */
+	param_period_time_if_needed = SNDRV_PCM_HW_PARAM_PERIOD_TIME;
+	if (snd_usb_get_speed(subs->dev) != USB_SPEED_HIGH)
+		/* full speed devices have fixed data packet interval */
+		ptmin = 1000;
+	if (ptmin == 1000)
+		/* if period time doesn't go below 1 ms, no rules needed */
+		param_period_time_if_needed = -1;
 	snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_TIME,
-				     1000 * MIN_PACKS_URB,
-				     /*(nrpacks * MAX_URBS) * 1000*/ UINT_MAX);
-
-	if (check_hw_params_convention(subs)) {
-		hwc_debug("setting extra hw constraints...\n");
-		if ((err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
-					       hw_rule_rate, subs,
-					       SNDRV_PCM_HW_PARAM_FORMAT,
-					       SNDRV_PCM_HW_PARAM_CHANNELS,
-					       -1)) < 0)
-			return err;
-		if ((err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
-					       hw_rule_channels, subs,
-					       SNDRV_PCM_HW_PARAM_FORMAT,
-					       SNDRV_PCM_HW_PARAM_RATE,
-					       -1)) < 0)
-			return err;
-		if ((err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT,
-					       hw_rule_format, subs,
-					       SNDRV_PCM_HW_PARAM_RATE,
-					       SNDRV_PCM_HW_PARAM_CHANNELS,
-					       -1)) < 0)
+				     ptmin, UINT_MAX);
+
+	if ((err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
+				       hw_rule_rate, subs,
+				       SNDRV_PCM_HW_PARAM_FORMAT,
+				       SNDRV_PCM_HW_PARAM_CHANNELS,
+				       param_period_time_if_needed,
+				       -1)) < 0)
+		return err;
+	if ((err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
+				       hw_rule_channels, subs,
+				       SNDRV_PCM_HW_PARAM_FORMAT,
+				       SNDRV_PCM_HW_PARAM_RATE,
+				       param_period_time_if_needed,
+				       -1)) < 0)
+		return err;
+	if ((err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT,
+				       hw_rule_format, subs,
+				       SNDRV_PCM_HW_PARAM_RATE,
+				       SNDRV_PCM_HW_PARAM_CHANNELS,
+				       param_period_time_if_needed,
+				       -1)) < 0)
+		return err;
+	if (param_period_time_if_needed >= 0) {
+		err = snd_pcm_hw_rule_add(runtime, 0,
+					  SNDRV_PCM_HW_PARAM_PERIOD_TIME,
+					  hw_rule_period_time, subs,
+					  SNDRV_PCM_HW_PARAM_FORMAT,
+					  SNDRV_PCM_HW_PARAM_CHANNELS,
+					  SNDRV_PCM_HW_PARAM_RATE,
+					  -1);
+		if (err < 0)
 			return err;
 	}
+	if ((err = snd_usb_pcm_check_knot(runtime, subs)) < 0)
+		return err;
 	return 0;
 }
 
-static int snd_usb_pcm_open(struct snd_pcm_substream *substream, int direction,
-			    struct snd_pcm_hardware *hw)
+static int snd_usb_pcm_open(struct snd_pcm_substream *substream, int direction)
 {
 	struct snd_usb_stream *as = snd_pcm_substream_chip(substream);
 	struct snd_pcm_runtime *runtime = substream->runtime;
@@ -1826,7 +1925,7 @@ static int snd_usb_pcm_open(struct snd_pcm_substream *substream, int direction,
 
 	subs->interface = -1;
 	subs->format = 0;
-	runtime->hw = *hw;
+	runtime->hw = snd_usb_hardware;
 	runtime->private_data = subs;
 	subs->pcm_substream = substream;
 	return setup_hw_info(runtime, subs);
@@ -1847,7 +1946,7 @@ static int snd_usb_pcm_close(struct snd_pcm_substream *substream, int direction)
 
 static int snd_usb_playback_open(struct snd_pcm_substream *substream)
 {
-	return snd_usb_pcm_open(substream, SNDRV_PCM_STREAM_PLAYBACK, &snd_usb_playback);
+	return snd_usb_pcm_open(substream, SNDRV_PCM_STREAM_PLAYBACK);
 }
 
 static int snd_usb_playback_close(struct snd_pcm_substream *substream)
@@ -1857,7 +1956,7 @@ static int snd_usb_playback_close(struct snd_pcm_substream *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);
+	return snd_usb_pcm_open(substream, SNDRV_PCM_STREAM_CAPTURE);
 }
 
 static int snd_usb_capture_close(struct snd_pcm_substream *substream)
@@ -1960,10 +2059,9 @@ int snd_usb_ctl_msg(struct usb_device *dev, unsigned int pipe, __u8 request,
 	void *buf = NULL;
 
 	if (size > 0) {
-		buf = kmalloc(size, GFP_KERNEL);
+		buf = kmemdup(data, size, GFP_KERNEL);
 		if (!buf)
 			return -ENOMEM;
-		memcpy(buf, data, size);
 	}
 	err = usb_control_msg(dev, pipe, request, requesttype,
 			      value, index, buf, size, timeout);
@@ -1983,6 +2081,14 @@ static int usb_audio_probe(struct usb_interface *intf,
 			   const struct usb_device_id *id);
 static void usb_audio_disconnect(struct usb_interface *intf);
 
+#ifdef CONFIG_PM
+static int usb_audio_suspend(struct usb_interface *intf, pm_message_t message);
+static int usb_audio_resume(struct usb_interface *intf);
+#else
+#define usb_audio_suspend NULL
+#define usb_audio_resume NULL
+#endif
+
 static struct usb_device_id usb_audio_ids [] = {
 #include "usbquirks.h"
     { .match_flags = (USB_DEVICE_ID_MATCH_INT_CLASS | USB_DEVICE_ID_MATCH_INT_SUBCLASS),
@@ -1997,10 +2103,14 @@ static struct usb_driver usb_audio_driver = {
 	.name =		"snd-usb-audio",
 	.probe =	usb_audio_probe,
 	.disconnect =	usb_audio_disconnect,
+	.suspend =	usb_audio_suspend,
+	.resume =	usb_audio_resume,
 	.id_table =	usb_audio_ids,
 };
 
 
+#if defined(CONFIG_PROC_FS) && defined(CONFIG_SND_VERBOSE_PROCFS)
+
 /*
  * proc interface for list the supported pcm formats
  */
@@ -2016,7 +2126,8 @@ static void proc_dump_substream_formats(struct snd_usb_substream *subs, struct s
 		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: %s\n",
+			    snd_pcm_format_name(fp->format));
 		snd_iprintf(buffer, "    Channels: %d\n", fp->channels);
 		snd_iprintf(buffer, "    Endpoint: %d %s (%s)\n",
 			    fp->endpoint & USB_ENDPOINT_NUMBER_MASK,
@@ -2035,8 +2146,11 @@ static void proc_dump_substream_formats(struct snd_usb_substream *subs, struct s
 			}
 			snd_iprintf(buffer, "\n");
 		}
+		if (snd_usb_get_speed(subs->dev) == USB_SPEED_HIGH)
+			snd_iprintf(buffer, "    Data packet interval: %d us\n",
+				    125 * (1 << fp->datainterval));
 		// snd_iprintf(buffer, "    Max Packet Size = %d\n", fp->maxpacksize);
-		// snd_iprintf(buffer, "    EP Attribute = 0x%x\n", fp->attributes);
+		// snd_iprintf(buffer, "    EP Attribute = %#x\n", fp->attributes);
 	}
 }
 
@@ -2087,10 +2201,17 @@ static void proc_pcm_format_add(struct snd_usb_stream *stream)
 	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);
+	if (!snd_card_proc_new(card, name, &entry))
+		snd_info_set_text_ops(entry, stream, proc_pcm_format_read);
+}
+
+#else
+
+static inline void proc_pcm_format_add(struct snd_usb_stream *stream)
+{
 }
 
+#endif
 
 /*
  * initialize the substream instance.
@@ -2106,10 +2227,18 @@ static void init_substream(struct snd_usb_stream *as, int stream, struct audiofo
 	subs->stream = as;
 	subs->direction = stream;
 	subs->dev = as->chip->dev;
-	if (snd_usb_get_speed(subs->dev) == USB_SPEED_FULL)
+	if (snd_usb_get_speed(subs->dev) == USB_SPEED_FULL) {
 		subs->ops = audio_urb_ops[stream];
-	else
+	} else {
 		subs->ops = audio_urb_ops_high_speed[stream];
+		switch (as->chip->usb_id) {
+		case USB_ID(0x041e, 0x3f02): /* E-Mu 0202 USB */
+		case USB_ID(0x041e, 0x3f04): /* E-Mu 0404 USB */
+		case USB_ID(0x041e, 0x3f0a): /* E-Mu Tracker Pre */
+			subs->ops.retire_sync = retire_playback_sync_urb_hs_emu;
+			break;
+		}
+	}
 	snd_pcm_set_ops(as->pcm, stream,
 			stream == SNDRV_PCM_STREAM_PLAYBACK ?
 			&snd_usb_playback_ops : &snd_usb_capture_ops);
@@ -2129,13 +2258,14 @@ static void free_substream(struct snd_usb_substream *subs)
 {
 	struct list_head *p, *n;
 
-	if (! subs->num_formats)
+	if (!subs->num_formats)
 		return; /* not initialized */
 	list_for_each_safe(p, n, &subs->fmt_list) {
 		struct audioformat *fp = list_entry(p, struct audioformat, list);
 		kfree(fp->rate_table);
 		kfree(fp);
 	}
+	kfree(subs->rate_list.list);
 }
 
 
@@ -2178,7 +2308,7 @@ static int add_audio_endpoint(struct snd_usb_audio *chip, int stream, struct aud
 		if (as->fmt_type != fp->fmt_type)
 			continue;
 		subs = &as->substream[stream];
-		if (! subs->endpoint)
+		if (!subs->endpoint)
 			continue;
 		if (subs->endpoint == fp->endpoint) {
 			list_add_tail(&fp->list, &subs->fmt_list);
@@ -2203,10 +2333,9 @@ static int add_audio_endpoint(struct snd_usb_audio *chip, int stream, struct aud
 	}
 
 	/* create a new pcm */
-	as = kmalloc(sizeof(*as), GFP_KERNEL);
-	if (! as)
+	as = kzalloc(sizeof(*as), GFP_KERNEL);
+	if (!as)
 		return -ENOMEM;
-	memset(as, 0, sizeof(*as));
 	as->pcm_index = chip->pcm_devs;
 	as->chip = chip;
 	as->fmt_type = fp->fmt_type;
@@ -2249,7 +2378,9 @@ static int is_big_endian_format(struct snd_usb_audio *chip, struct audioformat *
 			return 1;
 		break;
 	case USB_ID(0x0763, 0x2003): /* M-Audio Audiophile USB */
-		return 1;
+		if (device_setup[chip->index] == 0x00 ||
+		    fp->altsetting==1 || fp->altsetting==2 || fp->altsetting==3)
+			return 1;
 	}
 	return 0;
 }
@@ -2312,11 +2443,12 @@ static int parse_audio_format_i_type(struct snd_usb_audio *chip, struct audiofor
 		}
 		break;
 	case USB_AUDIO_FORMAT_PCM8:
-		/* Dallas DS4201 workaround */
+		pcm_format = SNDRV_PCM_FORMAT_U8;
+
+		/* Dallas DS4201 workaround: it advertises U8 format, but really
+		   supports S8. */
 		if (chip->usb_id == USB_ID(0x04fa, 0x4201))
 			pcm_format = SNDRV_PCM_FORMAT_S8;
-		else
-			pcm_format = SNDRV_PCM_FORMAT_U8;
 		break;
 	case USB_AUDIO_FORMAT_IEEE_FLOAT:
 		pcm_format = SNDRV_PCM_FORMAT_FLOAT_LE;
@@ -2350,6 +2482,7 @@ static int parse_audio_format_rates(struct snd_usb_audio *chip, struct audioform
 				    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",
 				   chip->dev->devnum, fp->iface, fp->altsetting);
@@ -2360,32 +2493,37 @@ static int parse_audio_format_rates(struct snd_usb_audio *chip, struct audioform
 		/*
 		 * build the rate table and bitmap flags
 		 */
-		int r, idx, c;
-		/* this table corresponds to the SNDRV_PCM_RATE_XXX bit */
-		static unsigned int conv_rates[] = {
-			5512, 8000, 11025, 16000, 22050, 32000, 44100, 48000,
-			64000, 88200, 96000, 176400, 192000
-		};
+		int r, idx;
+
 		fp->rate_table = kmalloc(sizeof(int) * nr_rates, GFP_KERNEL);
 		if (fp->rate_table == NULL) {
 			snd_printk(KERN_ERR "cannot malloc\n");
 			return -1;
 		}
 
-		fp->nr_rates = nr_rates;
-		fp->rate_min = fp->rate_max = combine_triple(&fmt[8]);
+		fp->nr_rates = 0;
+		fp->rate_min = fp->rate_max = 0;
 		for (r = 0, idx = offset + 1; r < nr_rates; r++, idx += 3) {
-			unsigned int rate = fp->rate_table[r] = combine_triple(&fmt[idx]);
-			if (rate < fp->rate_min)
+			unsigned int rate = combine_triple(&fmt[idx]);
+			if (!rate)
+				continue;
+			/* C-Media CM6501 mislabels its 96 kHz altsetting */
+			if (rate == 48000 && nr_rates == 1 &&
+			    (chip->usb_id == USB_ID(0x0d8c, 0x0201) ||
+			     chip->usb_id == USB_ID(0x0d8c, 0x0102)) &&
+			    fp->altsetting == 5 && fp->maxpacksize == 392)
+				rate = 96000;
+			fp->rate_table[fp->nr_rates] = rate;
+			if (!fp->rate_min || rate < fp->rate_min)
 				fp->rate_min = rate;
-			else if (rate > fp->rate_max)
+			if (!fp->rate_max || rate > fp->rate_max)
 				fp->rate_max = rate;
-			for (c = 0; c < (int)ARRAY_SIZE(conv_rates); c++) {
-				if (rate == conv_rates[c]) {
-					fp->rates |= (1 << c);
-					break;
-				}
-			}
+			fp->rates |= snd_pcm_rate_to_rate_bit(rate);
+			fp->nr_rates++;
+		}
+		if (!fp->nr_rates) {
+			hwc_debug("All rates were zero. Skipping format!\n");
+			return -1;
 		}
 	} else {
 		/* continuous rates */
@@ -2409,7 +2547,18 @@ static int parse_audio_format_i(struct snd_usb_audio *chip, struct audioformat *
 		 *        but we give normal PCM format to get the existing
 		 *        apps working...
 		 */
-		pcm_format = SNDRV_PCM_FORMAT_S16_LE;
+		switch (chip->usb_id) {
+
+		case USB_ID(0x0763, 0x2003): /* M-Audio Audiophile USB */
+			if (device_setup[chip->index] == 0x00 && 
+			    fp->altsetting == 6)
+				pcm_format = SNDRV_PCM_FORMAT_S16_BE;
+			else
+				pcm_format = SNDRV_PCM_FORMAT_S16_LE;
+			break;
+		default:
+			pcm_format = SNDRV_PCM_FORMAT_S16_LE;
+		}
 	} else {
 		pcm_format = parse_audio_format_i_type(chip, fp, format, fmt);
 		if (pcm_format < 0)
@@ -2442,7 +2591,7 @@ static int parse_audio_format_ii(struct snd_usb_audio *chip, struct audioformat
 		fp->format = SNDRV_PCM_FORMAT_MPEG;
 		break;
 	default:
-		snd_printd(KERN_INFO "%d:%u:%d : unknown format tag 0x%x is detected.  processed as MPEG.\n",
+		snd_printd(KERN_INFO "%d:%u:%d : unknown format tag %#x is detected.  processed as MPEG.\n",
 			   chip->dev->devnum, fp->iface, fp->altsetting, format);
 		fp->format = SNDRV_PCM_FORMAT_MPEG;
 		break;
@@ -2477,12 +2626,13 @@ static int parse_audio_format(struct snd_usb_audio *chip, struct audioformat *fp
 	if (err < 0)
 		return err;
 #if 1
-	/* FIXME: temporary hack for extigy/audigy 2 nx */
+	/* 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 (chip->usb_id == USB_ID(0x041e, 0x3000) ||
-	    chip->usb_id == USB_ID(0x041e, 0x3020)) {
+	    chip->usb_id == USB_ID(0x041e, 0x3020) ||
+	    chip->usb_id == USB_ID(0x041e, 0x3061)) {
 		if (fmt[3] == USB_FORMAT_TYPE_I &&
 		    fp->rates != SNDRV_PCM_RATE_48000 &&
 		    fp->rates != SNDRV_PCM_RATE_96000)
@@ -2492,6 +2642,19 @@ static int parse_audio_format(struct snd_usb_audio *chip, struct audioformat *fp
 	return 0;
 }
 
+static unsigned char parse_datainterval(struct snd_usb_audio *chip,
+					struct usb_host_interface *alts)
+{
+	if (snd_usb_get_speed(chip->dev) == USB_SPEED_HIGH &&
+	    get_endpoint(alts, 0)->bInterval >= 1 &&
+	    get_endpoint(alts, 0)->bInterval <= 4)
+		return get_endpoint(alts, 0)->bInterval - 1;
+	else
+		return 0;
+}
+
+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;
@@ -2500,14 +2663,25 @@ static int parse_audio_endpoints(struct snd_usb_audio *chip, int iface_no)
 	struct usb_interface_descriptor *altsd;
 	int i, altno, err, stream;
 	int format;
-	struct audioformat *fp;
+	struct audioformat *fp = NULL;
 	unsigned char *fmt, *csep;
+	int num;
 
 	dev = chip->dev;
 
 	/* parse the interface's altsettings */
 	iface = usb_ifnum_to_if(dev, iface_no);
-	for (i = 0; i < iface->num_altsetting; i++) {
+
+	num = iface->num_altsetting;
+
+	/*
+	 * Dallas DS4201 workaround: It presents 5 altsettings, but the last
+	 * one misses syncpipe, and does not produce any sound.
+	 */
+	if (chip->usb_id == USB_ID(0x04fa, 0x4201))
+		num = 4;
+
+	for (i = 0; i < num; i++) {
 		alts = &iface->altsetting[i];
 		altsd = get_iface_desc(alts);
 		/* skip invalid one */
@@ -2526,6 +2700,12 @@ static int parse_audio_endpoints(struct snd_usb_audio *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);
@@ -2556,33 +2736,46 @@ static int parse_audio_endpoints(struct snd_usb_audio *chip, int iface_no)
 			continue;
 		}
 
+		/*
+		 * Blue Microphones workaround: The last altsetting is identical
+		 * with the previous one, except for a larger packet size, but
+		 * is actually a mislabeled two-channel setting; ignore it.
+		 */
+		if (fmt[4] == 1 && fmt[5] == 2 && altno == 2 && num == 3 &&
+		    fp && fp->altsetting == 1 && fp->channels == 1 &&
+		    fp->format == SNDRV_PCM_FORMAT_S16_LE &&
+		    le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize) ==
+							fp->maxpacksize * 2)
+			continue;
+
 		csep = snd_usb_find_desc(alts->endpoint[0].extra, alts->endpoint[0].extralen, NULL, USB_DT_CS_ENDPOINT);
 		/* Creamware Noah has this descriptor after the 2nd endpoint */
 		if (!csep && altsd->bNumEndpoints >= 2)
 			csep = snd_usb_find_desc(alts->endpoint[1].extra, alts->endpoint[1].extralen, NULL, USB_DT_CS_ENDPOINT);
 		if (!csep || csep[0] < 7 || csep[2] != EP_GENERAL) {
-			snd_printk(KERN_ERR "%d:%u:%d : no or invalid class specific endpoint descriptor\n",
+			snd_printk(KERN_WARNING "%d:%u:%d : no or invalid"
+				   " class specific endpoint descriptor\n",
 				   dev->devnum, iface_no, altno);
-			continue;
+			csep = NULL;
 		}
 
-		fp = kmalloc(sizeof(*fp), GFP_KERNEL);
+		fp = kzalloc(sizeof(*fp), GFP_KERNEL);
 		if (! fp) {
 			snd_printk(KERN_ERR "cannot malloc\n");
 			return -ENOMEM;
 		}
 
-		memset(fp, 0, sizeof(*fp));
 		fp->iface = iface_no;
 		fp->altsetting = altno;
 		fp->altset_idx = i;
 		fp->endpoint = get_endpoint(alts, 0)->bEndpointAddress;
 		fp->ep_attr = get_endpoint(alts, 0)->bmAttributes;
+		fp->datainterval = parse_datainterval(chip, alts);
 		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];
+		fp->attributes = csep ? csep[3] : 0;
 
 		/* some quirks for attributes here */
 
@@ -2620,7 +2813,7 @@ static int parse_audio_endpoints(struct snd_usb_audio *chip, int iface_no)
 			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 %#x\n", dev->devnum, iface_no, altno, fp->endpoint);
 		err = add_audio_endpoint(chip, stream, fp);
 		if (err < 0) {
 			kfree(fp->rate_table);
@@ -2700,7 +2893,9 @@ static int snd_usb_create_streams(struct snd_usb_audio *chip, int ctrlif)
 		if ((altsd->bInterfaceClass == USB_CLASS_AUDIO ||
 		     altsd->bInterfaceClass == USB_CLASS_VENDOR_SPEC) &&
 		    altsd->bInterfaceSubClass == USB_SUBCLASS_MIDI_STREAMING) {
-			if (snd_usb_create_midi_interface(chip, iface, NULL) < 0) {
+			int err = snd_usbmidi_create(chip->card, iface,
+						     &chip->midi_list, NULL);
+			if (err < 0) {
 				snd_printk(KERN_ERR "%d:%u:%d: cannot create sequencer device\n", dev->devnum, ctrlif, j);
 				continue;
 			}
@@ -2714,6 +2909,10 @@ static int snd_usb_create_streams(struct snd_usb_audio *chip, int ctrlif)
 			/* skip non-supported classes */
 			continue;
 		}
+		if (snd_usb_get_speed(dev) == USB_SPEED_LOW) {
+			snd_printk(KERN_ERR "low speed audio streaming not supported\n");
+			continue;
+		}
 		if (! parse_audio_endpoints(chip, j)) {
 			usb_set_interface(dev, j, 0); /* reset the current interface */
 			usb_driver_claim_interface(&usb_audio_driver, iface, (void *)-1L);
@@ -2733,14 +2932,13 @@ static int create_fixed_stream_quirk(struct snd_usb_audio *chip,
 	struct audioformat *fp;
 	struct usb_host_interface *alts;
 	int stream, err;
-	int *rate_table = NULL;
+	unsigned *rate_table = NULL;
 
-	fp = kmalloc(sizeof(*fp), GFP_KERNEL);
+	fp = kmemdup(quirk->data, sizeof(*fp), GFP_KERNEL);
 	if (! fp) {
-		snd_printk(KERN_ERR "cannot malloc\n");
+		snd_printk(KERN_ERR "cannot memdup\n");
 		return -ENOMEM;
 	}
-	memcpy(fp, quirk->data, sizeof(*fp));
 	if (fp->nr_rates > 0) {
 		rate_table = kmalloc(sizeof(int) * fp->nr_rates, GFP_KERNEL);
 		if (!rate_table) {
@@ -2766,6 +2964,8 @@ static int create_fixed_stream_quirk(struct snd_usb_audio *chip,
 		return -EINVAL;
 	}
 	alts = &iface->altsetting[fp->altset_idx];
+	fp->datainterval = parse_datainterval(chip, alts);
+	fp->maxpacksize = le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize);
 	usb_set_interface(chip->dev, fp->iface, 0);
 	init_usb_pitch(chip->dev, fp->iface, alts, fp);
 	init_usb_sample_rate(chip->dev, fp->iface, alts, fp, fp->rate_max);
@@ -2797,12 +2997,12 @@ static int create_standard_audio_quirk(struct snd_usb_audio *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.
+ * Create a stream for an Edirol UA-700/UA-25/UA-4FX interface.  
+ * The only way to detect the sample rate is by looking at wMaxPacketSize.
  */
-static int create_ua700_ua25_quirk(struct snd_usb_audio *chip,
-				   struct usb_interface *iface,
-				   const struct snd_usb_audio_quirk *quirk)
+static int create_uaxx_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,
@@ -2817,8 +3017,8 @@ static int create_ua700_ua25_quirk(struct snd_usb_audio *chip,
 	struct audioformat *fp;
 	int stream, err;
 
-	/* both PCM and MIDI interfaces have 2 altsettings */
-	if (iface->num_altsetting != 2)
+	/* both PCM and MIDI interfaces have 2 or more altsettings */
+	if (iface->num_altsetting < 2)
 		return -ENXIO;
 	alts = &iface->altsetting[1];
 	altsd = get_iface_desc(alts);
@@ -2832,20 +3032,19 @@ static int create_ua700_ua25_quirk(struct snd_usb_audio *chip,
 			.type = QUIRK_MIDI_FIXED_ENDPOINT,
 			.data = &ua700_ep
 		};
-		static const struct snd_usb_midi_endpoint_info ua25_ep = {
+		static const struct snd_usb_midi_endpoint_info uaxx_ep = {
 			.out_cables = 0x0001,
 			.in_cables  = 0x0001
 		};
-		static const struct snd_usb_audio_quirk ua25_quirk = {
+		static const struct snd_usb_audio_quirk uaxx_quirk = {
 			.type = QUIRK_MIDI_FIXED_ENDPOINT,
-			.data = &ua25_ep
+			.data = &uaxx_ep
 		};
-		if (chip->usb_id == USB_ID(0x0582, 0x002b))
-			return snd_usb_create_midi_interface(chip, iface,
-							     &ua700_quirk);
-		else
-			return snd_usb_create_midi_interface(chip, iface,
-							     &ua25_quirk);
+		const struct snd_usb_audio_quirk *quirk =
+			chip->usb_id == USB_ID(0x0582, 0x002b)
+			? &ua700_quirk : &uaxx_quirk;
+		return snd_usbmidi_create(chip->card, iface,
+					  &chip->midi_list, quirk);
 	}
 
 	if (altsd->bNumEndpoints != 1)
@@ -2859,6 +3058,7 @@ static int create_ua700_ua25_quirk(struct snd_usb_audio *chip,
 	fp->iface = altsd->bInterfaceNumber;
 	fp->endpoint = get_endpoint(alts, 0)->bEndpointAddress;
 	fp->ep_attr = get_endpoint(alts, 0)->bmAttributes;
+	fp->datainterval = 0;
 	fp->maxpacksize = le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize);
 
 	switch (fp->maxpacksize) {
@@ -2914,19 +3114,19 @@ static int create_ua1000_quirk(struct snd_usb_audio *chip,
 		return -ENXIO;
 	alts = &iface->altsetting[1];
 	altsd = get_iface_desc(alts);
-	if (alts->extralen != 11 || alts->extra[1] != CS_AUDIO_INTERFACE ||
+	if (alts->extralen != 11 || alts->extra[1] != USB_DT_CS_INTERFACE ||
 	    altsd->bNumEndpoints != 1)
 		return -ENXIO;
 
-	fp = kmalloc(sizeof(*fp), GFP_KERNEL);
+	fp = kmemdup(&ua1000_format, sizeof(*fp), GFP_KERNEL);
 	if (!fp)
 		return -ENOMEM;
-	memcpy(fp, &ua1000_format, sizeof(*fp));
 
 	fp->channels = alts->extra[4];
 	fp->iface = altsd->bInterfaceNumber;
 	fp->endpoint = get_endpoint(alts, 0)->bEndpointAddress;
 	fp->ep_attr = get_endpoint(alts, 0)->bmAttributes;
+	fp->datainterval = parse_datainterval(chip, alts);
 	fp->maxpacksize = le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize);
 	fp->rate_max = fp->rate_min = combine_triple(&alts->extra[8]);
 
@@ -2942,6 +3142,59 @@ static int create_ua1000_quirk(struct snd_usb_audio *chip,
 	return 0;
 }
 
+/*
+ * Create a stream for an Edirol UA-101 interface.
+ * Copy, paste and modify from Edirol UA-1000
+ */
+static int create_ua101_quirk(struct snd_usb_audio *chip,
+			       struct usb_interface *iface,
+			       const struct snd_usb_audio_quirk *quirk)
+{
+	static const struct audioformat ua101_format = {
+		.format = SNDRV_PCM_FORMAT_S32_LE,
+		.fmt_type = USB_FORMAT_TYPE_I,
+		.altsetting = 1,
+		.altset_idx = 1,
+		.attributes = 0,
+		.rates = SNDRV_PCM_RATE_CONTINUOUS,
+	};
+	struct usb_host_interface *alts;
+	struct usb_interface_descriptor *altsd;
+	struct audioformat *fp;
+	int stream, err;
+
+	if (iface->num_altsetting != 2)
+		return -ENXIO;
+	alts = &iface->altsetting[1];
+	altsd = get_iface_desc(alts);
+	if (alts->extralen != 18 || alts->extra[1] != USB_DT_CS_INTERFACE ||
+	    altsd->bNumEndpoints != 1)
+		return -ENXIO;
+
+	fp = kmemdup(&ua101_format, sizeof(*fp), GFP_KERNEL);
+	if (!fp)
+		return -ENOMEM;
+
+	fp->channels = alts->extra[11];
+	fp->iface = altsd->bInterfaceNumber;
+	fp->endpoint = get_endpoint(alts, 0)->bEndpointAddress;
+	fp->ep_attr = get_endpoint(alts, 0)->bmAttributes;
+	fp->datainterval = parse_datainterval(chip, alts);
+	fp->maxpacksize = le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize);
+	fp->rate_max = fp->rate_min = combine_triple(&alts->extra[15]);
+
+	stream = (fp->endpoint & USB_DIR_IN)
+		? SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK;
+	err = add_audio_endpoint(chip, stream, fp);
+	if (err < 0) {
+		kfree(fp);
+		return err;
+	}
+	/* FIXME: playback must be synchronized to capture */
+	usb_set_interface(chip->dev, fp->iface, 0);
+	return 0;
+}
+
 static int snd_usb_create_quirk(struct snd_usb_audio *chip,
 				struct usb_interface *iface,
 				const struct snd_usb_audio_quirk *quirk);
@@ -3028,6 +3281,102 @@ static int snd_usb_audigy2nx_boot_quirk(struct usb_device *dev)
 	return 0;
 }
 
+/*
+ * C-Media CM106/CM106+ have four 16-bit internal registers that are nicely
+ * documented in the device's data sheet.
+ */
+static int snd_usb_cm106_write_int_reg(struct usb_device *dev, int reg, u16 value)
+{
+	u8 buf[4];
+	buf[0] = 0x20;
+	buf[1] = value & 0xff;
+	buf[2] = (value >> 8) & 0xff;
+	buf[3] = reg;
+	return snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), USB_REQ_SET_CONFIGURATION,
+			       USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_ENDPOINT,
+			       0, 0, &buf, 4, 1000);
+}
+
+static int snd_usb_cm106_boot_quirk(struct usb_device *dev)
+{
+	/*
+	 * Enable line-out driver mode, set headphone source to front
+	 * channels, enable stereo mic.
+	 */
+	return snd_usb_cm106_write_int_reg(dev, 2, 0x8004);
+}
+
+/*
+ * C-Media CM6206 is based on CM106 with two additional
+ * registers that are not documented in the data sheet.
+ * Values here are chosen based on sniffing USB traffic
+ * under Windows.
+ */
+static int snd_usb_cm6206_boot_quirk(struct usb_device *dev)
+{
+	int err, reg;
+	int val[] = {0x200c, 0x3000, 0xf800, 0x143f, 0x0000, 0x3000};
+
+	for (reg = 0; reg < ARRAY_SIZE(val); reg++) {
+		err = snd_usb_cm106_write_int_reg(dev, reg, val[reg]);
+		if (err < 0)
+			return err;
+	}
+
+	return err;
+}
+
+/*
+ * 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)
+{
+	/* Reset ALL ifaces to 0 altsetting.
+	 * Call it for every possible altsetting of every interface.
+	 */
+	usb_set_interface(chip->dev, iface, 0);
+
+	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 */
+}
+
+static int create_any_midi_quirk(struct snd_usb_audio *chip,
+				 struct usb_interface *intf,
+				 const struct snd_usb_audio_quirk *quirk)
+{
+	return snd_usbmidi_create(chip->card, intf, &chip->midi_list, quirk);
+}
 
 /*
  * audio-interface quirks
@@ -3046,18 +3395,19 @@ static int snd_usb_create_quirk(struct snd_usb_audio *chip,
 	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_MIDITECH] = snd_usb_create_midi_interface,
+		[QUIRK_MIDI_STANDARD_INTERFACE] = create_any_midi_quirk,
+		[QUIRK_MIDI_FIXED_ENDPOINT] = create_any_midi_quirk,
+		[QUIRK_MIDI_YAMAHA] = create_any_midi_quirk,
+		[QUIRK_MIDI_MIDIMAN] = create_any_midi_quirk,
+		[QUIRK_MIDI_NOVATION] = create_any_midi_quirk,
+		[QUIRK_MIDI_FASTLANE] = create_any_midi_quirk,
+		[QUIRK_MIDI_EMAGIC] = create_any_midi_quirk,
+		[QUIRK_MIDI_CME] = create_any_midi_quirk,
 		[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,
+		[QUIRK_AUDIO_EDIROL_UA101] = create_ua101_quirk,
+		[QUIRK_AUDIO_EDIROL_UAXX] = create_uaxx_quirk
 	};
 
 	if (quirk->type < QUIRK_TYPE_COUNT) {
@@ -3075,14 +3425,14 @@ static int snd_usb_create_quirk(struct snd_usb_audio *chip,
 static void proc_audio_usbbus_read(struct snd_info_entry *entry, struct snd_info_buffer *buffer)
 {
 	struct snd_usb_audio *chip = entry->private_data;
-	if (! chip->shutdown)
+	if (!chip->shutdown)
 		snd_iprintf(buffer, "%03d/%03d\n", chip->dev->bus->busnum, chip->dev->devnum);
 }
 
 static void proc_audio_usbid_read(struct snd_info_entry *entry, struct snd_info_buffer *buffer)
 {
 	struct snd_usb_audio *chip = entry->private_data;
-	if (! chip->shutdown)
+	if (!chip->shutdown)
 		snd_iprintf(buffer, "%04x:%04x\n", 
 			    USB_ID_VENDOR(chip->usb_id),
 			    USB_ID_PRODUCT(chip->usb_id));
@@ -3091,10 +3441,10 @@ static void proc_audio_usbid_read(struct snd_info_entry *entry, struct snd_info_
 static void snd_usb_audio_create_proc(struct snd_usb_audio *chip)
 {
 	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))
-		snd_info_set_text_ops(entry, chip, 1024, proc_audio_usbid_read);
+	if (!snd_card_proc_new(chip->card, "usbbus", &entry))
+		snd_info_set_text_ops(entry, chip, proc_audio_usbbus_read);
+	if (!snd_card_proc_new(chip->card, "usbid", &entry))
+		snd_info_set_text_ops(entry, chip, proc_audio_usbid_read);
 }
 
 /*
@@ -3134,16 +3484,17 @@ static int snd_usb_audio_create(struct usb_device *dev, int idx,
 
 	*rchip = NULL;
 
-	if (snd_usb_get_speed(dev) != USB_SPEED_FULL &&
+	if (snd_usb_get_speed(dev) != USB_SPEED_LOW &&
+	    snd_usb_get_speed(dev) != USB_SPEED_FULL &&
 	    snd_usb_get_speed(dev) != USB_SPEED_HIGH) {
 		snd_printk(KERN_ERR "unknown device speed %d\n", snd_usb_get_speed(dev));
 		return -ENXIO;
 	}
 
-	card = snd_card_new(index[idx], id[idx], THIS_MODULE, 0);
-	if (card == NULL) {
+	err = snd_card_create(index[idx], id[idx], THIS_MODULE, 0, &card);
+	if (err < 0) {
 		snd_printk(KERN_ERR "cannot create card instance %d\n", idx);
-		return -ENOMEM;
+		return err;
 	}
 
 	chip = kzalloc(sizeof(*chip), GFP_KERNEL);
@@ -3208,7 +3559,9 @@ static int snd_usb_audio_create(struct usb_device *dev, int idx,
 		usb_make_path(dev, card->longname + len, sizeof(card->longname) - len);
 
 	strlcat(card->longname,
-		snd_usb_get_speed(dev) == USB_SPEED_FULL ? ", full speed" : ", high speed",
+		snd_usb_get_speed(dev) == USB_SPEED_LOW ? ", low speed" :
+		snd_usb_get_speed(dev) == USB_SPEED_FULL ? ", full speed" :
+		", high speed",
 		sizeof(card->longname));
 
 	snd_usb_audio_create_proc(chip);
@@ -3259,13 +3612,25 @@ static void *snd_usb_audio_probe(struct usb_device *dev,
 			goto __err_val;
 	}
 
+	/* C-Media CM106 / Turtle Beach Audio Advantage Roadie */
+	if (id == USB_ID(0x10f5, 0x0200)) {
+		if (snd_usb_cm106_boot_quirk(dev) < 0)
+			goto __err_val;
+	}
+
+	/* C-Media CM6206 / CM106-Like Sound Device */
+	if (id == USB_ID(0x0d8c, 0x0102)) {
+		if (snd_usb_cm6206_boot_quirk(dev) < 0)
+			goto __err_val;
+	}
+
 	/*
 	 * found a config.  now register to ALSA
 	 */
 
 	/* 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) {
@@ -3290,8 +3655,8 @@ static void *snd_usb_audio_probe(struct usb_device *dev,
 				snd_card_set_dev(chip->card, &intf->dev);
 				break;
 			}
-		if (! chip) {
-			snd_printk(KERN_ERR "no available usb audio device\n");
+		if (!chip) {
+			printk(KERN_ERR "no available usb audio device\n");
 			goto __error;
 		}
 	}
@@ -3306,7 +3671,7 @@ static void *snd_usb_audio_probe(struct usb_device *dev,
 	if (err > 0) {
 		/* create normal USB audio interfaces */
 		if (snd_usb_create_streams(chip, ifnum) < 0 ||
-		    snd_usb_create_mixer(chip, ifnum) < 0) {
+		    snd_usb_create_mixer(chip, ifnum, ignore_ctl_error) < 0) {
 			goto __error;
 		}
 	}
@@ -3318,13 +3683,13 @@ 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;
 }
@@ -3344,7 +3709,7 @@ 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) {
@@ -3362,10 +3727,10 @@ static void snd_usb_audio_disconnect(struct usb_device *dev, void *ptr)
 			snd_usb_mixer_disconnect(p);
 		}
 		usb_chip[chip->index] = NULL;
-		up(&register_mutex);
-		snd_card_free(card);
+		mutex_unlock(&register_mutex);
+		snd_card_free_when_closed(card);
 	} else {
-		up(&register_mutex);
+		mutex_unlock(&register_mutex);
 	}
 }
 
@@ -3378,7 +3743,7 @@ static int usb_audio_probe(struct usb_interface *intf,
 	void *chip;
 	chip = snd_usb_audio_probe(interface_to_usbdev(intf), intf, id);
 	if (chip) {
-		dev_set_drvdata(&intf->dev, chip);
+		usb_set_intfdata(intf, chip);
 		return 0;
 	} else
 		return -EIO;
@@ -3387,18 +3752,56 @@ static int usb_audio_probe(struct usb_interface *intf,
 static void usb_audio_disconnect(struct usb_interface *intf)
 {
 	snd_usb_audio_disconnect(interface_to_usbdev(intf),
-				 dev_get_drvdata(&intf->dev));
+				 usb_get_intfdata(intf));
+}
+
+#ifdef CONFIG_PM
+static int usb_audio_suspend(struct usb_interface *intf, pm_message_t message)
+{
+	struct snd_usb_audio *chip = usb_get_intfdata(intf);
+	struct list_head *p;
+	struct snd_usb_stream *as;
+
+	if (chip == (void *)-1L)
+		return 0;
+
+	snd_power_change_state(chip->card, SNDRV_CTL_POWER_D3hot);
+	if (!chip->num_suspended_intf++) {
+		list_for_each(p, &chip->pcm_list) {
+			as = list_entry(p, struct snd_usb_stream, list);
+			snd_pcm_suspend_all(as->pcm);
+		}
+	}
+
+	return 0;
 }
 
+static int usb_audio_resume(struct usb_interface *intf)
+{
+	struct snd_usb_audio *chip = usb_get_intfdata(intf);
+
+	if (chip == (void *)-1L)
+		return 0;
+	if (--chip->num_suspended_intf)
+		return 0;
+	/*
+	 * ALSA leaves material resumption to user space
+	 * we just notify
+	 */
+
+	snd_power_change_state(chip->card, SNDRV_CTL_POWER_D0);
+
+	return 0;
+}
+#endif		/* CONFIG_PM */
 
 static int __init snd_usb_audio_init(void)
 {
-	if (nrpacks < MIN_PACKS_URB || nrpacks > MAX_PACKS) {
+	if (nrpacks < 1 || nrpacks > MAX_PACKS) {
 		printk(KERN_WARNING "invalid nrpacks value.\n");
 		return -EINVAL;
 	}
-	usb_register(&usb_audio_driver);
-	return 0;
+	return usb_register(&usb_audio_driver);
 }