sound: usb: make the USB MIDI module more independent
[safe/jmp/linux-2.6] / sound / usb / usbaudio.c
index a1bd804..b074a59 100644 (file)
@@ -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);
 }