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authorTakashi Iwai <tiwai@suse.de>2012-04-18 07:57:32 +0200
committerTakashi Iwai <tiwai@suse.de>2012-04-18 07:57:32 +0200
commit56599bb0208fa0ae6e58d3c304a851149973e48d (patch)
treeb3d500ae4415ef2f8e931af9f995f522c6623c4a /sound/usb
parent7536c301f8817214629e80fa06b5b5c93df3ad52 (diff)
parent22026c1a7be900cc6dabd6be37a77bb217d2d837 (diff)
downloadop-kernel-dev-56599bb0208fa0ae6e58d3c304a851149973e48d.zip
op-kernel-dev-56599bb0208fa0ae6e58d3c304a851149973e48d.tar.gz
Merge branch 'topic/usb-endpoint' into topic/misc
Diffstat (limited to 'sound/usb')
-rw-r--r--sound/usb/card.c10
-rw-r--r--sound/usb/card.h77
-rw-r--r--sound/usb/endpoint.c1601
-rw-r--r--sound/usb/endpoint.h32
-rw-r--r--sound/usb/pcm.c441
-rw-r--r--sound/usb/proc.c32
-rw-r--r--sound/usb/stream.c31
-rw-r--r--sound/usb/usbaudio.h2
8 files changed, 1401 insertions, 825 deletions
diff --git a/sound/usb/card.c b/sound/usb/card.c
index 4a7be7b..d5b5c33 100644
--- a/sound/usb/card.c
+++ b/sound/usb/card.c
@@ -131,8 +131,9 @@ static void snd_usb_stream_disconnect(struct list_head *head)
subs = &as->substream[idx];
if (!subs->num_formats)
continue;
- snd_usb_release_substream_urbs(subs, 1);
subs->interface = -1;
+ subs->data_endpoint = NULL;
+ subs->sync_endpoint = NULL;
}
}
@@ -276,6 +277,7 @@ static int snd_usb_create_streams(struct snd_usb_audio *chip, int ctrlif)
static int snd_usb_audio_free(struct snd_usb_audio *chip)
{
+ mutex_destroy(&chip->mutex);
kfree(chip);
return 0;
}
@@ -336,6 +338,7 @@ static int snd_usb_audio_create(struct usb_device *dev, int idx,
return -ENOMEM;
}
+ mutex_init(&chip->mutex);
mutex_init(&chip->shutdown_mutex);
chip->index = idx;
chip->dev = dev;
@@ -348,6 +351,7 @@ static int snd_usb_audio_create(struct usb_device *dev, int idx,
chip->usb_id = USB_ID(le16_to_cpu(dev->descriptor.idVendor),
le16_to_cpu(dev->descriptor.idProduct));
INIT_LIST_HEAD(&chip->pcm_list);
+ INIT_LIST_HEAD(&chip->ep_list);
INIT_LIST_HEAD(&chip->midi_list);
INIT_LIST_HEAD(&chip->mixer_list);
@@ -565,6 +569,10 @@ static void snd_usb_audio_disconnect(struct usb_device *dev,
list_for_each(p, &chip->pcm_list) {
snd_usb_stream_disconnect(p);
}
+ /* release the endpoint resources */
+ list_for_each(p, &chip->ep_list) {
+ snd_usb_endpoint_free(p);
+ }
/* release the midi resources */
list_for_each(p, &chip->midi_list) {
snd_usbmidi_disconnect(p);
diff --git a/sound/usb/card.h b/sound/usb/card.h
index da5fa1a..77d2eec 100644
--- a/sound/usb/card.h
+++ b/sound/usb/card.h
@@ -30,13 +30,17 @@ struct audioformat {
};
struct snd_usb_substream;
+struct snd_usb_endpoint;
struct snd_urb_ctx {
struct urb *urb;
unsigned int buffer_size; /* size of data buffer, if data URB */
struct snd_usb_substream *subs;
+ struct snd_usb_endpoint *ep;
int index; /* index for urb array */
int packets; /* number of packets per urb */
+ int packet_size[MAX_PACKS_HS]; /* size of packets for next submission */
+ struct list_head ready_list;
};
struct snd_urb_ops {
@@ -46,6 +50,60 @@ struct snd_urb_ops {
int (*retire_sync)(struct snd_usb_substream *subs, struct snd_pcm_runtime *runtime, struct urb *u);
};
+struct snd_usb_endpoint {
+ struct snd_usb_audio *chip;
+
+ int use_count;
+ int ep_num; /* the referenced endpoint number */
+ int type; /* SND_USB_ENDPOINT_TYPE_* */
+ unsigned long flags;
+
+ void (*prepare_data_urb) (struct snd_usb_substream *subs,
+ struct urb *urb);
+ void (*retire_data_urb) (struct snd_usb_substream *subs,
+ struct urb *urb);
+
+ struct snd_usb_substream *data_subs;
+ struct snd_usb_endpoint *sync_master;
+ struct snd_usb_endpoint *sync_slave;
+
+ struct snd_urb_ctx urb[MAX_URBS];
+
+ struct snd_usb_packet_info {
+ uint32_t packet_size[MAX_PACKS_HS];
+ int packets;
+ } next_packet[MAX_URBS];
+ int next_packet_read_pos, next_packet_write_pos;
+ struct list_head ready_playback_urbs;
+
+ unsigned int nurbs; /* # urbs */
+ unsigned long active_mask; /* bitmask of active urbs */
+ unsigned long unlink_mask; /* bitmask of unlinked urbs */
+ char *syncbuf; /* sync buffer for all sync URBs */
+ dma_addr_t sync_dma; /* DMA address of syncbuf */
+
+ unsigned int pipe; /* the data i/o pipe */
+ unsigned int freqn; /* nominal sampling rate in fs/fps in Q16.16 format */
+ unsigned int freqm; /* momentary sampling rate in fs/fps in Q16.16 format */
+ int freqshift; /* how much to shift the feedback value to get Q16.16 */
+ unsigned int freqmax; /* maximum sampling rate, used for buffer management */
+ unsigned int phase; /* phase accumulator */
+ unsigned int maxpacksize; /* max packet size in bytes */
+ unsigned int maxframesize; /* max packet size in frames */
+ unsigned int curpacksize; /* current packet size in bytes (for capture) */
+ unsigned int curframesize; /* current packet size in frames (for capture) */
+ unsigned int syncmaxsize; /* sync endpoint packet size */
+ unsigned int fill_max:1; /* fill max packet size always */
+ unsigned int datainterval; /* log_2 of data packet interval */
+ unsigned int syncinterval; /* P for adaptive mode, 0 otherwise */
+ unsigned char silence_value;
+ unsigned int stride;
+ int iface, alt_idx;
+
+ spinlock_t lock;
+ struct list_head list;
+};
+
struct snd_usb_substream {
struct snd_usb_stream *stream;
struct usb_device *dev;
@@ -57,21 +115,6 @@ struct snd_usb_substream {
unsigned int cur_rate; /* current rate (for hw_params callback) */
unsigned int period_bytes; /* current period bytes (for hw_params callback) */
unsigned int altset_idx; /* USB data format: index of alternate setting */
- unsigned int datapipe; /* the data i/o pipe */
- unsigned int syncpipe; /* 1 - async out or adaptive in */
- unsigned int datainterval; /* log_2 of data packet interval */
- unsigned int syncinterval; /* P for adaptive mode, 0 otherwise */
- unsigned int freqn; /* nominal sampling rate in fs/fps in Q16.16 format */
- unsigned int freqm; /* momentary sampling rate in fs/fps in Q16.16 format */
- int freqshift; /* how much to shift the feedback value to get Q16.16 */
- unsigned int freqmax; /* maximum sampling rate, used for buffer management */
- unsigned int phase; /* phase accumulator */
- unsigned int maxpacksize; /* max packet size in bytes */
- unsigned int maxframesize; /* max packet size in frames */
- unsigned int curpacksize; /* current packet size in bytes (for capture) */
- unsigned int curframesize; /* current packet size in frames (for capture) */
- unsigned int syncmaxsize; /* sync endpoint packet size */
- unsigned int fill_max: 1; /* fill max packet size always */
unsigned int txfr_quirk:1; /* allow sub-frame alignment */
unsigned int fmt_type; /* USB audio format type (1-3) */
@@ -87,6 +130,10 @@ struct snd_usb_substream {
struct snd_urb_ctx syncurb[SYNC_URBS]; /* sync urb table */
char *syncbuf; /* sync buffer for all sync URBs */
dma_addr_t sync_dma; /* DMA address of syncbuf */
+ /* data and sync endpoints for this stream */
+ struct snd_usb_endpoint *data_endpoint;
+ struct snd_usb_endpoint *sync_endpoint;
+ unsigned long flags;
u64 formats; /* format bitmasks (all or'ed) */
unsigned int num_formats; /* number of supported audio formats (list) */
diff --git a/sound/usb/endpoint.c b/sound/usb/endpoint.c
index 08dcce5..12e5a95 100644
--- a/sound/usb/endpoint.c
+++ b/sound/usb/endpoint.c
@@ -20,9 +20,11 @@
#include <linux/ratelimit.h>
#include <linux/usb.h>
#include <linux/usb/audio.h>
+#include <linux/slab.h>
#include <sound/core.h>
#include <sound/pcm.h>
+#include <sound/pcm_params.h>
#include "usbaudio.h"
#include "helper.h"
@@ -30,6 +32,35 @@
#include "endpoint.h"
#include "pcm.h"
+#define EP_FLAG_ACTIVATED 0
+#define EP_FLAG_RUNNING 1
+
+/*
+ * snd_usb_endpoint is a model that abstracts everything related to an
+ * USB endpoint and its streaming.
+ *
+ * There are functions to activate and deactivate the streaming URBs and
+ * optinal callbacks to let the pcm logic handle the actual content of the
+ * packets for playback and record. Thus, the bus streaming and the audio
+ * handlers are fully decoupled.
+ *
+ * There are two different types of endpoints in for audio applications.
+ *
+ * SND_USB_ENDPOINT_TYPE_DATA handles full audio data payload for both
+ * inbound and outbound traffic.
+ *
+ * SND_USB_ENDPOINT_TYPE_SYNC are for inbound traffic only and expect the
+ * payload to carry Q16.16 formatted sync information (3 or 4 bytes).
+ *
+ * Each endpoint has to be configured (by calling
+ * snd_usb_endpoint_set_params()) before it can be used.
+ *
+ * The model incorporates a reference counting, so that multiple users
+ * can call snd_usb_endpoint_start() and snd_usb_endpoint_stop(), and
+ * only the first user will effectively start the URBs, and only the last
+ * one will tear them down again.
+ */
+
/*
* convert a sampling rate into our full speed format (fs/1000 in Q16.16)
* this will overflow at approx 524 kHz
@@ -49,71 +80,414 @@ static inline unsigned get_usb_high_speed_rate(unsigned int rate)
}
/*
- * unlink active urbs.
+ * release a urb data
*/
-static int deactivate_urbs(struct snd_usb_substream *subs, int force, int can_sleep)
+static void release_urb_ctx(struct snd_urb_ctx *u)
{
- struct snd_usb_audio *chip = subs->stream->chip;
- unsigned int i;
- int async;
+ if (u->buffer_size)
+ usb_free_coherent(u->ep->chip->dev, u->buffer_size,
+ u->urb->transfer_buffer,
+ u->urb->transfer_dma);
+ usb_free_urb(u->urb);
+ u->urb = NULL;
+}
+
+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";
+ }
+}
+
+/**
+ * snd_usb_endpoint_implicit_feedback_sink: Report endpoint usage type
+ *
+ * @ep: The endpoint
+ *
+ * Determine whether an endpoint is driven by an implicit feedback
+ * data endpoint source.
+ */
+int snd_usb_endpoint_implict_feedback_sink(struct snd_usb_endpoint *ep)
+{
+ return ep->sync_master &&
+ ep->sync_master->type == SND_USB_ENDPOINT_TYPE_DATA &&
+ ep->type == SND_USB_ENDPOINT_TYPE_DATA &&
+ usb_pipeout(ep->pipe);
+}
- subs->running = 0;
+/*
+ * For streaming based on information derived from sync endpoints,
+ * prepare_outbound_urb_sizes() will call next_packet_size() to
+ * determine the number of samples to be sent in the next packet.
+ *
+ * For implicit feedback, next_packet_size() is unused.
+ */
+static int next_packet_size(struct snd_usb_endpoint *ep)
+{
+ unsigned long flags;
+ int ret;
- if (!force && subs->stream->chip->shutdown) /* to be sure... */
- return -EBADFD;
+ if (ep->fill_max)
+ return ep->maxframesize;
- async = !can_sleep && chip->async_unlink;
+ spin_lock_irqsave(&ep->lock, flags);
+ ep->phase = (ep->phase & 0xffff)
+ + (ep->freqm << ep->datainterval);
+ ret = min(ep->phase >> 16, ep->maxframesize);
+ spin_unlock_irqrestore(&ep->lock, flags);
- if (!async && in_interrupt())
- return 0;
+ return ret;
+}
- for (i = 0; i < subs->nurbs; i++) {
- if (test_bit(i, &subs->active_mask)) {
- if (!test_and_set_bit(i, &subs->unlink_mask)) {
- struct urb *u = subs->dataurb[i].urb;
- if (async)
- usb_unlink_urb(u);
- else
- usb_kill_urb(u);
+static void retire_outbound_urb(struct snd_usb_endpoint *ep,
+ struct snd_urb_ctx *urb_ctx)
+{
+ if (ep->retire_data_urb)
+ ep->retire_data_urb(ep->data_subs, urb_ctx->urb);
+}
+
+static void retire_inbound_urb(struct snd_usb_endpoint *ep,
+ struct snd_urb_ctx *urb_ctx)
+{
+ struct urb *urb = urb_ctx->urb;
+
+ if (ep->sync_slave)
+ snd_usb_handle_sync_urb(ep->sync_slave, ep, urb);
+
+ if (ep->retire_data_urb)
+ ep->retire_data_urb(ep->data_subs, urb);
+}
+
+static void prepare_outbound_urb_sizes(struct snd_usb_endpoint *ep,
+ struct snd_urb_ctx *ctx)
+{
+ int i;
+
+ for (i = 0; i < ctx->packets; ++i)
+ ctx->packet_size[i] = next_packet_size(ep);
+}
+
+/*
+ * Prepare a PLAYBACK urb for submission to the bus.
+ */
+static void prepare_outbound_urb(struct snd_usb_endpoint *ep,
+ struct snd_urb_ctx *ctx)
+{
+ int i;
+ struct urb *urb = ctx->urb;
+ unsigned char *cp = urb->transfer_buffer;
+
+ urb->dev = ep->chip->dev; /* we need to set this at each time */
+
+ switch (ep->type) {
+ case SND_USB_ENDPOINT_TYPE_DATA:
+ if (ep->prepare_data_urb) {
+ ep->prepare_data_urb(ep->data_subs, urb);
+ } else {
+ /* no data provider, so send silence */
+ unsigned int offs = 0;
+ for (i = 0; i < ctx->packets; ++i) {
+ int counts = ctx->packet_size[i];
+ urb->iso_frame_desc[i].offset = offs * ep->stride;
+ urb->iso_frame_desc[i].length = counts * ep->stride;
+ offs += counts;
}
+
+ urb->number_of_packets = ctx->packets;
+ urb->transfer_buffer_length = offs * ep->stride;
+ memset(urb->transfer_buffer, ep->silence_value,
+ offs * ep->stride);
}
+ break;
+
+ case SND_USB_ENDPOINT_TYPE_SYNC:
+ if (snd_usb_get_speed(ep->chip->dev) >= USB_SPEED_HIGH) {
+ /*
+ * fill the length and offset of each urb descriptor.
+ * the fixed 12.13 frequency is passed as 16.16 through the pipe.
+ */
+ urb->iso_frame_desc[0].length = 4;
+ urb->iso_frame_desc[0].offset = 0;
+ cp[0] = ep->freqn;
+ cp[1] = ep->freqn >> 8;
+ cp[2] = ep->freqn >> 16;
+ cp[3] = ep->freqn >> 24;
+ } else {
+ /*
+ * fill the length and offset of each urb descriptor.
+ * the fixed 10.14 frequency is passed through the pipe.
+ */
+ urb->iso_frame_desc[0].length = 3;
+ urb->iso_frame_desc[0].offset = 0;
+ cp[0] = ep->freqn >> 2;
+ cp[1] = ep->freqn >> 10;
+ cp[2] = ep->freqn >> 18;
+ }
+
+ break;
}
- 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)) {
- struct urb *u = subs->syncurb[i].urb;
- if (async)
- usb_unlink_urb(u);
- else
- usb_kill_urb(u);
- }
- }
+}
+
+/*
+ * Prepare a CAPTURE or SYNC urb for submission to the bus.
+ */
+static inline void prepare_inbound_urb(struct snd_usb_endpoint *ep,
+ struct snd_urb_ctx *urb_ctx)
+{
+ int i, offs;
+ struct urb *urb = urb_ctx->urb;
+
+ urb->dev = ep->chip->dev; /* we need to set this at each time */
+
+ switch (ep->type) {
+ case SND_USB_ENDPOINT_TYPE_DATA:
+ offs = 0;
+ for (i = 0; i < urb_ctx->packets; i++) {
+ urb->iso_frame_desc[i].offset = offs;
+ urb->iso_frame_desc[i].length = ep->curpacksize;
+ offs += ep->curpacksize;
}
+
+ urb->transfer_buffer_length = offs;
+ urb->number_of_packets = urb_ctx->packets;
+ break;
+
+ case SND_USB_ENDPOINT_TYPE_SYNC:
+ urb->iso_frame_desc[0].length = min(4u, ep->syncmaxsize);
+ urb->iso_frame_desc[0].offset = 0;
+ break;
}
- return 0;
}
+/*
+ * Send output urbs that have been prepared previously. Urbs are dequeued
+ * from ep->ready_playback_urbs and in case there there aren't any available
+ * or there are no packets that have been prepared, this function does
+ * nothing.
+ *
+ * The reason why the functionality of sending and preparing urbs is separated
+ * is that host controllers don't guarantee an ordering in returing inbound
+ * and outbound packets to their submitters.
+ *
+ * This function is only used for implicit feedback endpoints. For endpoints
+ * driven by sync endpoints, urbs are submitted from their completion handler.
+ */
+static void queue_pending_output_urbs(struct snd_usb_endpoint *ep)
+{
+ while (test_bit(EP_FLAG_RUNNING, &ep->flags)) {
+
+ unsigned long flags;
+ struct snd_usb_packet_info *packet;
+ struct snd_urb_ctx *ctx = NULL;
+ struct urb *urb;
+ int err, i;
+
+ spin_lock_irqsave(&ep->lock, flags);
+ if (ep->next_packet_read_pos != ep->next_packet_write_pos) {
+ packet = ep->next_packet + ep->next_packet_read_pos;
+ ep->next_packet_read_pos++;
+ ep->next_packet_read_pos %= MAX_URBS;
+
+ /* take URB out of FIFO */
+ if (!list_empty(&ep->ready_playback_urbs))
+ ctx = list_first_entry(&ep->ready_playback_urbs,
+ struct snd_urb_ctx, ready_list);
+ }
+ spin_unlock_irqrestore(&ep->lock, flags);
+
+ if (ctx == NULL)
+ return;
+
+ list_del_init(&ctx->ready_list);
+ urb = ctx->urb;
+
+ /* copy over the length information */
+ for (i = 0; i < packet->packets; i++)
+ ctx->packet_size[i] = packet->packet_size[i];
+
+ /* call the data handler to fill in playback data */
+ prepare_outbound_urb(ep, ctx);
+
+ err = usb_submit_urb(ctx->urb, GFP_ATOMIC);
+ if (err < 0)
+ snd_printk(KERN_ERR "Unable to submit urb #%d: %d (urb %p)\n",
+ ctx->index, err, ctx->urb);
+ else
+ set_bit(ctx->index, &ep->active_mask);
+ }
+}
/*
- * release a urb data
+ * complete callback for urbs
*/
-static void release_urb_ctx(struct snd_urb_ctx *u)
+static void snd_complete_urb(struct urb *urb)
+{
+ struct snd_urb_ctx *ctx = urb->context;
+ struct snd_usb_endpoint *ep = ctx->ep;
+ int err;
+
+ if (unlikely(urb->status == -ENOENT || /* unlinked */
+ urb->status == -ENODEV || /* device removed */
+ urb->status == -ECONNRESET || /* unlinked */
+ urb->status == -ESHUTDOWN || /* device disabled */
+ ep->chip->shutdown)) /* device disconnected */
+ goto exit_clear;
+
+ if (usb_pipeout(ep->pipe)) {
+ retire_outbound_urb(ep, ctx);
+ /* can be stopped during retire callback */
+ if (unlikely(!test_bit(EP_FLAG_RUNNING, &ep->flags)))
+ goto exit_clear;
+
+ if (snd_usb_endpoint_implict_feedback_sink(ep)) {
+ unsigned long flags;
+
+ spin_lock_irqsave(&ep->lock, flags);
+ list_add_tail(&ctx->ready_list, &ep->ready_playback_urbs);
+ spin_unlock_irqrestore(&ep->lock, flags);
+ queue_pending_output_urbs(ep);
+
+ goto exit_clear;
+ }
+
+ prepare_outbound_urb_sizes(ep, ctx);
+ prepare_outbound_urb(ep, ctx);
+ } else {
+ retire_inbound_urb(ep, ctx);
+ /* can be stopped during retire callback */
+ if (unlikely(!test_bit(EP_FLAG_RUNNING, &ep->flags)))
+ goto exit_clear;
+
+ prepare_inbound_urb(ep, ctx);
+ }
+
+ err = usb_submit_urb(urb, GFP_ATOMIC);
+ if (err == 0)
+ return;
+
+ snd_printk(KERN_ERR "cannot submit urb (err = %d)\n", err);
+ //snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN);
+
+exit_clear:
+ clear_bit(ctx->index, &ep->active_mask);
+}
+
+/**
+ * snd_usb_add_endpoint: Add an endpoint to an audio chip
+ *
+ * @chip: The chip
+ * @alts: The USB host interface
+ * @ep_num: The number of the endpoint to use
+ * @direction: SNDRV_PCM_STREAM_PLAYBACK or SNDRV_PCM_STREAM_CAPTURE
+ * @type: SND_USB_ENDPOINT_TYPE_DATA or SND_USB_ENDPOINT_TYPE_SYNC
+ *
+ * If the requested endpoint has not been added to the given chip before,
+ * a new instance is created. Otherwise, a pointer to the previoulsy
+ * created instance is returned. In case of any error, NULL is returned.
+ *
+ * New endpoints will be added to chip->ep_list and must be freed by
+ * calling snd_usb_endpoint_free().
+ */
+struct snd_usb_endpoint *snd_usb_add_endpoint(struct snd_usb_audio *chip,
+ struct usb_host_interface *alts,
+ int ep_num, int direction, int type)
{
- if (u->urb) {
- if (u->buffer_size)
- usb_free_coherent(u->subs->dev, u->buffer_size,
- u->urb->transfer_buffer,
- u->urb->transfer_dma);
- usb_free_urb(u->urb);
- u->urb = NULL;
+ struct list_head *p;
+ struct snd_usb_endpoint *ep;
+ int ret, is_playback = direction == SNDRV_PCM_STREAM_PLAYBACK;
+
+ mutex_lock(&chip->mutex);
+
+ list_for_each(p, &chip->ep_list) {
+ ep = list_entry(p, struct snd_usb_endpoint, list);
+ if (ep->ep_num == ep_num &&
+ ep->iface == alts->desc.bInterfaceNumber &&
+ ep->alt_idx == alts->desc.bAlternateSetting) {
+ snd_printdd(KERN_DEBUG "Re-using EP %x in iface %d,%d @%p\n",
+ ep_num, ep->iface, ep->alt_idx, ep);
+ goto __exit_unlock;
+ }
+ }
+
+ snd_printdd(KERN_DEBUG "Creating new %s %s endpoint #%x\n",
+ is_playback ? "playback" : "capture",
+ type == SND_USB_ENDPOINT_TYPE_DATA ? "data" : "sync",
+ ep_num);
+
+ /* select the alt setting once so the endpoints become valid */
+ ret = usb_set_interface(chip->dev, alts->desc.bInterfaceNumber,
+ alts->desc.bAlternateSetting);
+ if (ret < 0) {
+ snd_printk(KERN_ERR "%s(): usb_set_interface() failed, ret = %d\n",
+ __func__, ret);
+ ep = NULL;
+ goto __exit_unlock;
}
+
+ ep = kzalloc(sizeof(*ep), GFP_KERNEL);
+ if (!ep)
+ goto __exit_unlock;
+
+ ep->chip = chip;
+ spin_lock_init(&ep->lock);
+ ep->type = type;
+ ep->ep_num = ep_num;
+ ep->iface = alts->desc.bInterfaceNumber;
+ ep->alt_idx = alts->desc.bAlternateSetting;
+ INIT_LIST_HEAD(&ep->ready_playback_urbs);
+ ep_num &= USB_ENDPOINT_NUMBER_MASK;
+
+ if (is_playback)
+ ep->pipe = usb_sndisocpipe(chip->dev, ep_num);
+ else
+ ep->pipe = usb_rcvisocpipe(chip->dev, ep_num);
+
+ if (type == SND_USB_ENDPOINT_TYPE_SYNC) {
+ if (get_endpoint(alts, 1)->bLength >= USB_DT_ENDPOINT_AUDIO_SIZE &&
+ get_endpoint(alts, 1)->bRefresh >= 1 &&
+ get_endpoint(alts, 1)->bRefresh <= 9)
+ ep->syncinterval = get_endpoint(alts, 1)->bRefresh;
+ else if (snd_usb_get_speed(chip->dev) == USB_SPEED_FULL)
+ ep->syncinterval = 1;
+ else if (get_endpoint(alts, 1)->bInterval >= 1 &&
+ get_endpoint(alts, 1)->bInterval <= 16)
+ ep->syncinterval = get_endpoint(alts, 1)->bInterval - 1;
+ else
+ ep->syncinterval = 3;
+
+ ep->syncmaxsize = le16_to_cpu(get_endpoint(alts, 1)->wMaxPacketSize);
+ }
+
+ list_add_tail(&ep->list, &chip->ep_list);
+
+__exit_unlock:
+ mutex_unlock(&chip->mutex);
+
+ return ep;
}
/*
* wait until all urbs are processed.
*/
-static int wait_clear_urbs(struct snd_usb_substream *subs)
+static int wait_clear_urbs(struct snd_usb_endpoint *ep)
{
unsigned long end_time = jiffies + msecs_to_jiffies(1000);
unsigned int i;
@@ -121,153 +495,148 @@ static int wait_clear_urbs(struct snd_usb_substream *subs)
do {
alive = 0;
- for (i = 0; i < subs->nurbs; i++) {
- if (test_bit(i, &subs->active_mask))
+ for (i = 0; i < ep->nurbs; i++)
+ if (test_bit(i, &ep->active_mask))
alive++;
- }
- if (subs->syncpipe) {
- for (i = 0; i < SYNC_URBS; i++) {
- if (test_bit(i + 16, &subs->active_mask))
- alive++;
- }
- }
- if (! alive)
+
+ if (!alive)
break;
+
schedule_timeout_uninterruptible(1);
} while (time_before(jiffies, end_time));
+
if (alive)
- snd_printk(KERN_ERR "timeout: still %d active urbs..\n", alive);
+ snd_printk(KERN_ERR "timeout: still %d active urbs on EP #%x\n",
+ alive, ep->ep_num);
+
return 0;
}
/*
- * release a substream
+ * unlink active urbs.
*/
-void snd_usb_release_substream_urbs(struct snd_usb_substream *subs, int force)
+static int deactivate_urbs(struct snd_usb_endpoint *ep, int force, int can_sleep)
{
- int i;
+ unsigned int i;
+ int async;
- /* stop urbs (to be sure) */
- deactivate_urbs(subs, force, 1);
- wait_clear_urbs(subs);
-
- for (i = 0; i < MAX_URBS; i++)
- release_urb_ctx(&subs->dataurb[i]);
- for (i = 0; i < SYNC_URBS; i++)
- release_urb_ctx(&subs->syncurb[i]);
- usb_free_coherent(subs->dev, SYNC_URBS * 4,
- subs->syncbuf, subs->sync_dma);
- subs->syncbuf = NULL;
- subs->nurbs = 0;
-}
+ if (!force && ep->chip->shutdown) /* to be sure... */
+ return -EBADFD;
-/*
- * complete callback from data urb
- */
-static void snd_complete_urb(struct urb *urb)
-{
- 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 */
- (err = subs->ops.prepare(subs, substream->runtime, urb)) < 0 ||
- (err = usb_submit_urb(urb, GFP_ATOMIC)) < 0) {
- clear_bit(ctx->index, &subs->active_mask);
- if (err < 0) {
- snd_printd(KERN_ERR "cannot submit urb (err = %d)\n", err);
- snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN);
+ async = !can_sleep && ep->chip->async_unlink;
+
+ clear_bit(EP_FLAG_RUNNING, &ep->flags);
+
+ INIT_LIST_HEAD(&ep->ready_playback_urbs);
+ ep->next_packet_read_pos = 0;
+ ep->next_packet_write_pos = 0;
+
+ if (!async && in_interrupt())
+ return 0;
+
+ for (i = 0; i < ep->nurbs; i++) {
+ if (test_bit(i, &ep->active_mask)) {
+ if (!test_and_set_bit(i, &ep->unlink_mask)) {
+ struct urb *u = ep->urb[i].urb;
+ if (async)
+ usb_unlink_urb(u);
+ else
+ usb_kill_urb(u);
+ }
}
}
-}
+ return 0;
+}
/*
- * complete callback from sync urb
+ * release an endpoint's urbs
*/
-static void snd_complete_sync_urb(struct urb *urb)
+static void release_urbs(struct snd_usb_endpoint *ep, int force)
{
- 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 */
- (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);
- if (err < 0) {
- snd_printd(KERN_ERR "cannot submit sync urb (err = %d)\n", err);
- snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN);
- }
- }
-}
+ int i;
+ /* route incoming urbs to nirvana */
+ ep->retire_data_urb = NULL;
+ ep->prepare_data_urb = NULL;
+
+ /* stop urbs */
+ deactivate_urbs(ep, force, 1);
+ wait_clear_urbs(ep);
+
+ for (i = 0; i < ep->nurbs; i++)
+ release_urb_ctx(&ep->urb[i]);
+
+ if (ep->syncbuf)
+ usb_free_coherent(ep->chip->dev, SYNC_URBS * 4,
+ ep->syncbuf, ep->sync_dma);
+
+ ep->syncbuf = NULL;
+ ep->nurbs = 0;
+}
/*
- * initialize a substream for plaback/capture
+ * configure a data endpoint
*/
-int snd_usb_init_substream_urbs(struct snd_usb_substream *subs,
- unsigned int period_bytes,
- unsigned int rate,
- unsigned int frame_bits)
+static int data_ep_set_params(struct snd_usb_endpoint *ep,
+ struct snd_pcm_hw_params *hw_params,
+ struct audioformat *fmt,
+ struct snd_usb_endpoint *sync_ep)
{
- unsigned int maxsize, i;
- int is_playback = subs->direction == SNDRV_PCM_STREAM_PLAYBACK;
- unsigned int urb_packs, total_packs, packs_per_ms;
- struct snd_usb_audio *chip = subs->stream->chip;
+ unsigned int maxsize, i, urb_packs, total_packs, packs_per_ms;
+ int period_bytes = params_period_bytes(hw_params);
+ int format = params_format(hw_params);
+ int is_playback = usb_pipeout(ep->pipe);
+ int frame_bits = snd_pcm_format_physical_width(params_format(hw_params)) *
+ params_channels(hw_params);
+
+ ep->datainterval = fmt->datainterval;
+ ep->stride = frame_bits >> 3;
+ ep->silence_value = format == SNDRV_PCM_FORMAT_U8 ? 0x80 : 0;
- /* calculate the frequency in 16.16 format */
- if (snd_usb_get_speed(subs->dev) == USB_SPEED_FULL)
- subs->freqn = get_usb_full_speed_rate(rate);
- else
- subs->freqn = get_usb_high_speed_rate(rate);
- subs->freqm = subs->freqn;
- subs->freqshift = INT_MIN;
/* calculate max. frequency */
- if (subs->maxpacksize) {
+ if (ep->maxpacksize) {
/* whatever fits into a max. size packet */
- maxsize = subs->maxpacksize;
- subs->freqmax = (maxsize / (frame_bits >> 3))
- << (16 - subs->datainterval);
+ maxsize = ep->maxpacksize;
+ ep->freqmax = (maxsize / (frame_bits >> 3))
+ << (16 - ep->datainterval);
} else {
/* no max. packet size: just take 25% higher than nominal */
- subs->freqmax = subs->freqn + (subs->freqn >> 2);
- maxsize = ((subs->freqmax + 0xffff) * (frame_bits >> 3))
- >> (16 - subs->datainterval);
+ ep->freqmax = ep->freqn + (ep->freqn >> 2);
+ maxsize = ((ep->freqmax + 0xffff) * (frame_bits >> 3))
+ >> (16 - ep->datainterval);
}
- subs->phase = 0;
- if (subs->fill_max)
- subs->curpacksize = subs->maxpacksize;
+ if (ep->fill_max)
+ ep->curpacksize = ep->maxpacksize;
else
- subs->curpacksize = maxsize;
+ ep->curpacksize = maxsize;
- if (snd_usb_get_speed(subs->dev) != USB_SPEED_FULL)
- packs_per_ms = 8 >> subs->datainterval;
+ if (snd_usb_get_speed(ep->chip->dev) != USB_SPEED_FULL)
+ packs_per_ms = 8 >> ep->datainterval;
else
packs_per_ms = 1;
- if (is_playback) {
- urb_packs = max(chip->nrpacks, 1);
- urb_packs = min(urb_packs, (unsigned int)MAX_PACKS);
- } else
+ if (is_playback && !snd_usb_endpoint_implict_feedback_sink(ep)) {
+ urb_packs = max(ep->chip->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);
+
+ if (sync_ep && !snd_usb_endpoint_implict_feedback_sink(ep))
+ urb_packs = min(urb_packs, 1U << sync_ep->syncinterval);
/* decide how many packets to be used */
- if (is_playback) {
+ if (is_playback && !snd_usb_endpoint_implict_feedback_sink(ep)) {
unsigned int minsize, maxpacks;
/* determine how small a packet can be */
- minsize = (subs->freqn >> (16 - subs->datainterval))
+ minsize = (ep->freqn >> (16 - ep->datainterval))
* (frame_bits >> 3);
/* with sync from device, assume it can be 12% lower */
- if (subs->syncpipe)
+ if (sync_ep)
minsize -= minsize >> 3;
minsize = max(minsize, 1u);
total_packs = (period_bytes + minsize - 1) / minsize;
@@ -284,284 +653,466 @@ int snd_usb_init_substream_urbs(struct snd_usb_substream *subs,
urb_packs >>= 1;
total_packs = MAX_URBS * urb_packs;
}
- subs->nurbs = (total_packs + urb_packs - 1) / urb_packs;
- if (subs->nurbs > MAX_URBS) {
+
+ ep->nurbs = (total_packs + urb_packs - 1) / urb_packs;
+ if (ep->nurbs > MAX_URBS) {
/* too much... */
- subs->nurbs = MAX_URBS;
+ ep->nurbs = MAX_URBS;
total_packs = MAX_URBS * urb_packs;
- } else if (subs->nurbs < 2) {
+ } else if (ep->nurbs < 2) {
/* too little - we need at least two packets
* to ensure contiguous playback/capture
*/
- subs->nurbs = 2;
+ ep->nurbs = 2;
}
/* allocate and initialize data urbs */
- for (i = 0; i < subs->nurbs; i++) {
- struct snd_urb_ctx *u = &subs->dataurb[i];
+ for (i = 0; i < ep->nurbs; i++) {
+ struct snd_urb_ctx *u = &ep->urb[i];
u->index = i;
- u->subs = subs;
- u->packets = (i + 1) * total_packs / subs->nurbs
- - i * total_packs / subs->nurbs;
+ u->ep = ep;
+ u->packets = (i + 1) * total_packs / ep->nurbs
+ - i * total_packs / ep->nurbs;
u->buffer_size = maxsize * u->packets;
- if (subs->fmt_type == UAC_FORMAT_TYPE_II)
+
+ if (fmt->fmt_type == UAC_FORMAT_TYPE_II)
u->packets++; /* for transfer delimiter */
u->urb = usb_alloc_urb(u->packets, GFP_KERNEL);
if (!u->urb)
goto out_of_memory;
+
u->urb->transfer_buffer =
- usb_alloc_coherent(subs->dev, u->buffer_size,
+ usb_alloc_coherent(ep->chip->dev, u->buffer_size,
GFP_KERNEL, &u->urb->transfer_dma);
if (!u->urb->transfer_buffer)
goto out_of_memory;
- u->urb->pipe = subs->datapipe;
+ u->urb->pipe = ep->pipe;
u->urb->transfer_flags = URB_ISO_ASAP | URB_NO_TRANSFER_DMA_MAP;
- u->urb->interval = 1 << subs->datainterval;
+ u->urb->interval = 1 << ep->datainterval;
u->urb->context = u;
u->urb->complete = snd_complete_urb;
+ INIT_LIST_HEAD(&u->ready_list);
}
- if (subs->syncpipe) {
- /* allocate and initialize sync urbs */
- subs->syncbuf = usb_alloc_coherent(subs->dev, SYNC_URBS * 4,
- GFP_KERNEL, &subs->sync_dma);
- if (!subs->syncbuf)
- goto out_of_memory;
- for (i = 0; i < SYNC_URBS; i++) {
- struct snd_urb_ctx *u = &subs->syncurb[i];
- u->index = i;
- u->subs = subs;
- u->packets = 1;
- u->urb = usb_alloc_urb(1, GFP_KERNEL);
- if (!u->urb)
- goto out_of_memory;
- u->urb->transfer_buffer = subs->syncbuf + i * 4;
- u->urb->transfer_dma = subs->sync_dma + i * 4;
- u->urb->transfer_buffer_length = 4;
- u->urb->pipe = subs->syncpipe;
- u->urb->transfer_flags = URB_ISO_ASAP |
- URB_NO_TRANSFER_DMA_MAP;
- u->urb->number_of_packets = 1;
- u->urb->interval = 1 << subs->syncinterval;
- u->urb->context = u;
- u->urb->complete = snd_complete_sync_urb;
- }
- }
return 0;
out_of_memory:
- snd_usb_release_substream_urbs(subs, 0);
+ release_urbs(ep, 0);
return -ENOMEM;
}
/*
- * prepare urb for full speed capture sync pipe
- *
- * fill the length and offset of each urb descriptor.
- * the fixed 10.14 frequency is passed through the pipe.
+ * configure a sync endpoint
*/
-static int prepare_capture_sync_urb(struct snd_usb_substream *subs,
- struct snd_pcm_runtime *runtime,
- struct urb *urb)
+static int sync_ep_set_params(struct snd_usb_endpoint *ep,
+ struct snd_pcm_hw_params *hw_params,
+ struct audioformat *fmt)
{
- unsigned char *cp = urb->transfer_buffer;
- struct snd_urb_ctx *ctx = urb->context;
+ int i;
+
+ ep->syncbuf = usb_alloc_coherent(ep->chip->dev, SYNC_URBS * 4,
+ GFP_KERNEL, &ep->sync_dma);
+ if (!ep->syncbuf)
+ return -ENOMEM;
+
+ for (i = 0; i < SYNC_URBS; i++) {
+ struct snd_urb_ctx *u = &ep->urb[i];
+ u->index = i;
+ u->ep = ep;
+ u->packets = 1;
+ u->urb = usb_alloc_urb(1, GFP_KERNEL);
+ if (!u->urb)
+ goto out_of_memory;
+ u->urb->transfer_buffer = ep->syncbuf + i * 4;
+ u->urb->transfer_dma = ep->sync_dma + i * 4;
+ u->urb->transfer_buffer_length = 4;
+ u->urb->pipe = ep->pipe;
+ u->urb->transfer_flags = URB_ISO_ASAP |
+ URB_NO_TRANSFER_DMA_MAP;
+ u->urb->number_of_packets = 1;
+ u->urb->interval = 1 << ep->syncinterval;
+ u->urb->context = u;
+ u->urb->complete = snd_complete_urb;
+ }
+
+ ep->nurbs = SYNC_URBS;
- urb->dev = ctx->subs->dev; /* we need to set this at each time */
- urb->iso_frame_desc[0].length = 3;
- urb->iso_frame_desc[0].offset = 0;
- cp[0] = subs->freqn >> 2;
- cp[1] = subs->freqn >> 10;
- cp[2] = subs->freqn >> 18;
return 0;
+
+out_of_memory:
+ release_urbs(ep, 0);
+ return -ENOMEM;
}
-/*
- * prepare urb for high speed capture sync pipe
+/**
+ * snd_usb_endpoint_set_params: configure an snd_endpoint
+ *
+ * @ep: the endpoint to configure
*
- * fill the length and offset of each urb descriptor.
- * the fixed 12.13 frequency is passed as 16.16 through the pipe.
+ * Determine the number of of URBs to be used on this endpoint.
+ * An endpoint must be configured before it can be started.
+ * An endpoint that is already running can not be reconfigured.
*/
-static int prepare_capture_sync_urb_hs(struct snd_usb_substream *subs,
- struct snd_pcm_runtime *runtime,
- struct urb *urb)
+int snd_usb_endpoint_set_params(struct snd_usb_endpoint *ep,
+ struct snd_pcm_hw_params *hw_params,
+ struct audioformat *fmt,
+ struct snd_usb_endpoint *sync_ep)
{
- unsigned char *cp = urb->transfer_buffer;
- struct snd_urb_ctx *ctx = urb->context;
+ int err;
- urb->dev = ctx->subs->dev; /* we need to set this at each time */
- urb->iso_frame_desc[0].length = 4;
- urb->iso_frame_desc[0].offset = 0;
- cp[0] = subs->freqn;
- cp[1] = subs->freqn >> 8;
- cp[2] = subs->freqn >> 16;
- cp[3] = subs->freqn >> 24;
- return 0;
+ if (ep->use_count != 0) {
+ snd_printk(KERN_WARNING "Unable to change format on ep #%x: already in use\n",
+ ep->ep_num);
+ return -EBUSY;
+ }
+
+ /* release old buffers, if any */
+ release_urbs(ep, 0);
+
+ ep->datainterval = fmt->datainterval;
+ ep->maxpacksize = fmt->maxpacksize;
+ ep->fill_max = !!(fmt->attributes & UAC_EP_CS_ATTR_FILL_MAX);
+
+ if (snd_usb_get_speed(ep->chip->dev) == USB_SPEED_FULL)
+ ep->freqn = get_usb_full_speed_rate(params_rate(hw_params));
+ else
+ ep->freqn = get_usb_high_speed_rate(params_rate(hw_params));
+
+ /* calculate the frequency in 16.16 format */
+ ep->freqm = ep->freqn;
+ ep->freqshift = INT_MIN;
+
+ ep->phase = 0;
+
+ switch (ep->type) {
+ case SND_USB_ENDPOINT_TYPE_DATA:
+ err = data_ep_set_params(ep, hw_params, fmt, sync_ep);
+ break;
+ case SND_USB_ENDPOINT_TYPE_SYNC:
+ err = sync_ep_set_params(ep, hw_params, fmt);
+ break;
+ default:
+ err = -EINVAL;
+ }
+
+ snd_printdd(KERN_DEBUG "Setting params for ep #%x (type %d, %d urbs), ret=%d\n",
+ ep->ep_num, ep->type, ep->nurbs, err);
+
+ return err;
}
-/*
- * process after capture sync complete
- * - nothing to do
+/**
+ * snd_usb_endpoint_start: start an snd_usb_endpoint
+ *
+ * @ep: the endpoint to start
+ *
+ * A call to this function will increment the use count of the endpoint.
+ * In case this not already running, the URBs for this endpoint will be
+ * submitted. Otherwise, this function does nothing.
+ *
+ * Must be balanced to calls of snd_usb_endpoint_stop().
+ *
+ * Returns an error if the URB submission failed, 0 in all other cases.
*/
-static int retire_capture_sync_urb(struct snd_usb_substream *subs,
- struct snd_pcm_runtime *runtime,
- struct urb *urb)
+int snd_usb_endpoint_start(struct snd_usb_endpoint *ep)
{
+ int err;
+ unsigned int i;
+
+ if (ep->chip->shutdown)
+ return -EBADFD;
+
+ /* already running? */
+ if (++ep->use_count != 1)
+ return 0;
+
+ if (snd_BUG_ON(!test_bit(EP_FLAG_ACTIVATED, &ep->flags)))
+ return -EINVAL;
+
+ /* just to be sure */
+ deactivate_urbs(ep, 0, 1);
+ wait_clear_urbs(ep);
+
+ ep->active_mask = 0;
+ ep->unlink_mask = 0;
+ ep->phase = 0;
+
+ /*
+ * If this endpoint has a data endpoint as implicit feedback source,
+ * don't start the urbs here. Instead, mark them all as available,
+ * wait for the record urbs to arrive and queue from that context.
+ */
+
+ set_bit(EP_FLAG_RUNNING, &ep->flags);
+
+ if (snd_usb_endpoint_implict_feedback_sink(ep)) {
+ for (i = 0; i < ep->nurbs; i++) {
+ struct snd_urb_ctx *ctx = ep->urb + i;
+ list_add_tail(&ctx->ready_list, &ep->ready_playback_urbs);
+ }
+
+ return 0;
+ }
+
+ for (i = 0; i < ep->nurbs; i++) {
+ struct urb *urb = ep->urb[i].urb;
+
+ if (snd_BUG_ON(!urb))
+ goto __error;
+
+ if (usb_pipeout(ep->pipe)) {
+ prepare_outbound_urb_sizes(ep, urb->context);
+ prepare_outbound_urb(ep, urb->context);
+ } else {
+ prepare_inbound_urb(ep, urb->context);
+ }
+
+ err = usb_submit_urb(urb, GFP_ATOMIC);
+ if (err < 0) {
+ snd_printk(KERN_ERR "cannot submit urb %d, error %d: %s\n",
+ i, err, usb_error_string(err));
+ goto __error;
+ }
+ set_bit(i, &ep->active_mask);
+ }
+
return 0;
+
+__error:
+ clear_bit(EP_FLAG_RUNNING, &ep->flags);
+ ep->use_count--;
+ deactivate_urbs(ep, 0, 0);
+ return -EPIPE;
}
-/*
- * prepare urb for capture data pipe
+/**
+ * snd_usb_endpoint_stop: stop an snd_usb_endpoint
+ *
+ * @ep: the endpoint to stop (may be NULL)
*
- * fill the offset and length of each descriptor.
+ * A call to this function will decrement the use count of the endpoint.
+ * In case the last user has requested the endpoint stop, the URBs will
+ * actually deactivated.
*
- * we use a temporary buffer to write the captured data.
- * since the length of written data is determined by host, we cannot
- * write onto the pcm buffer directly... the data is thus copied
- * later at complete callback to the global buffer.
+ * Must be balanced to calls of snd_usb_endpoint_start().
*/
-static int prepare_capture_urb(struct snd_usb_substream *subs,
- struct snd_pcm_runtime *runtime,
- struct urb *urb)
+void snd_usb_endpoint_stop(struct snd_usb_endpoint *ep,
+ int force, int can_sleep, int wait)
{
- int i, offs;
- struct snd_urb_ctx *ctx = urb->context;
+ if (!ep)
+ return;
- offs = 0;
- urb->dev = ctx->subs->dev; /* we need to set this at each time */
- for (i = 0; i < ctx->packets; i++) {
- urb->iso_frame_desc[i].offset = offs;
- urb->iso_frame_desc[i].length = subs->curpacksize;
- offs += subs->curpacksize;
+ if (snd_BUG_ON(ep->use_count == 0))
+ return;
+
+ if (snd_BUG_ON(!test_bit(EP_FLAG_ACTIVATED, &ep->flags)))
+ return;
+
+ if (--ep->use_count == 0) {
+ deactivate_urbs(ep, force, can_sleep);
+ ep->data_subs = NULL;
+ ep->sync_slave = NULL;
+ ep->retire_data_urb = NULL;
+ ep->prepare_data_urb = NULL;
+
+ if (wait)
+ wait_clear_urbs(ep);
}
- urb->transfer_buffer_length = offs;
- urb->number_of_packets = ctx->packets;
- return 0;
}
-/*
- * process after capture complete
+/**
+ * snd_usb_endpoint_activate: activate an snd_usb_endpoint
+ *
+ * @ep: the endpoint to activate
+ *
+ * If the endpoint is not currently in use, this functions will select the
+ * correct alternate interface setting for the interface of this endpoint.
*
- * copy the data from each desctiptor to the pcm buffer, and
- * update the current position.
+ * In case of any active users, this functions does nothing.
+ *
+ * Returns an error if usb_set_interface() failed, 0 in all other
+ * cases.
*/
-static int retire_capture_urb(struct snd_usb_substream *subs,
- struct snd_pcm_runtime *runtime,
- struct urb *urb)
+int snd_usb_endpoint_activate(struct snd_usb_endpoint *ep)
{
- unsigned long flags;
- unsigned char *cp;
- int i;
- unsigned int stride, frames, bytes, oldptr;
- int period_elapsed = 0;
+ if (ep->use_count != 0)
+ return 0;
- stride = runtime->frame_bits >> 3;
+ if (!ep->chip->shutdown &&
+ !test_and_set_bit(EP_FLAG_ACTIVATED, &ep->flags)) {
+ int ret;
- for (i = 0; i < urb->number_of_packets; i++) {
- cp = (unsigned char *)urb->transfer_buffer + urb->iso_frame_desc[i].offset;
- if (urb->iso_frame_desc[i].status && printk_ratelimit()) {
- snd_printdd("frame %d active: %d\n", i, urb->iso_frame_desc[i].status);
- // continue;
- }
- bytes = urb->iso_frame_desc[i].actual_length;
- frames = bytes / stride;
- if (!subs->txfr_quirk)
- bytes = frames * stride;
- if (bytes % (runtime->sample_bits >> 3) != 0) {
-#ifdef CONFIG_SND_DEBUG_VERBOSE
- int oldbytes = bytes;
-#endif
- bytes = frames * stride;
- snd_printdd(KERN_ERR "Corrected urb data len. %d->%d\n",
- oldbytes, bytes);
- }
- /* update the current pointer */
- spin_lock_irqsave(&subs->lock, flags);
- oldptr = subs->hwptr_done;
- subs->hwptr_done += bytes;
- if (subs->hwptr_done >= runtime->buffer_size * stride)
- subs->hwptr_done -= runtime->buffer_size * stride;
- frames = (bytes + (oldptr % stride)) / stride;
- subs->transfer_done += frames;
- if (subs->transfer_done >= runtime->period_size) {
- subs->transfer_done -= runtime->period_size;
- period_elapsed = 1;
- }
- spin_unlock_irqrestore(&subs->lock, flags);
- /* copy a data chunk */
- if (oldptr + bytes > runtime->buffer_size * stride) {
- unsigned int bytes1 =
- runtime->buffer_size * stride - oldptr;
- memcpy(runtime->dma_area + oldptr, cp, bytes1);
- memcpy(runtime->dma_area, cp + bytes1, bytes - bytes1);
- } else {
- memcpy(runtime->dma_area + oldptr, cp, bytes);
+ ret = usb_set_interface(ep->chip->dev, ep->iface, ep->alt_idx);
+ if (ret < 0) {
+ snd_printk(KERN_ERR "%s() usb_set_interface() failed, ret = %d\n",
+ __func__, ret);
+ clear_bit(EP_FLAG_ACTIVATED, &ep->flags);
+ return ret;
}
+
+ return 0;
}
- if (period_elapsed)
- snd_pcm_period_elapsed(subs->pcm_substream);
- return 0;
+
+ return -EBUSY;
}
-/*
- * Process after capture complete when paused. Nothing to do.
+/**
+ * snd_usb_endpoint_deactivate: deactivate an snd_usb_endpoint
+ *
+ * @ep: the endpoint to deactivate
+ *
+ * If the endpoint is not currently in use, this functions will select the
+ * alternate interface setting 0 for the interface of this endpoint.
+ *
+ * In case of any active users, this functions does nothing.
+ *
+ * Returns an error if usb_set_interface() failed, 0 in all other
+ * cases.
*/
-static int retire_paused_capture_urb(struct snd_usb_substream *subs,
- struct snd_pcm_runtime *runtime,
- struct urb *urb)
+int snd_usb_endpoint_deactivate(struct snd_usb_endpoint *ep)
{
- return 0;
-}
+ if (!ep)
+ return -EINVAL;
+ if (ep->use_count != 0)
+ return 0;
-/*
- * prepare urb for playback sync pipe
+ if (!ep->chip->shutdown &&
+ test_and_clear_bit(EP_FLAG_ACTIVATED, &ep->flags)) {
+ int ret;
+
+ ret = usb_set_interface(ep->chip->dev, ep->iface, 0);
+ if (ret < 0) {
+ snd_printk(KERN_ERR "%s(): usb_set_interface() failed, ret = %d\n",
+ __func__, ret);
+ return ret;
+ }
+
+ return 0;
+ }
+
+ return -EBUSY;
+}
+
+/** snd_usb_endpoint_free: Free the resources of an snd_usb_endpoint
+ *
+ * @ep: the list header of the endpoint to free
*
- * set up the offset and length to receive the current frequency.
+ * This function does not care for the endpoint's use count but will tear
+ * down all the streaming URBs immediately and free all resources.
*/
-static int prepare_playback_sync_urb(struct snd_usb_substream *subs,
- struct snd_pcm_runtime *runtime,
- struct urb *urb)
+void snd_usb_endpoint_free(struct list_head *head)
{
- struct snd_urb_ctx *ctx = urb->context;
+ struct snd_usb_endpoint *ep;
- urb->dev = ctx->subs->dev; /* we need to set this at each time */
- urb->iso_frame_desc[0].length = min(4u, ctx->subs->syncmaxsize);
- urb->iso_frame_desc[0].offset = 0;
- return 0;
+ ep = list_entry(head, struct snd_usb_endpoint, list);
+ release_urbs(ep, 1);
+ kfree(ep);
}
-/*
- * process after playback sync complete
- *
- * Full speed devices report feedback values in 10.14 format as samples per
- * frame, high speed devices in 16.16 format as samples per microframe.
- * Because the Audio Class 1 spec was written before USB 2.0, many high speed
- * devices use a wrong interpretation, some others use an entirely different
- * format. Therefore, we cannot predict what format any particular device uses
- * and must detect it automatically.
+/**
+ * snd_usb_handle_sync_urb: parse an USB sync packet
+ *
+ * @ep: the endpoint to handle the packet
+ * @sender: the sending endpoint
+ * @urb: the received packet
+ *
+ * This function is called from the context of an endpoint that received
+ * the packet and is used to let another endpoint object handle the payload.
*/
-static int retire_playback_sync_urb(struct snd_usb_substream *subs,
- struct snd_pcm_runtime *runtime,
- struct urb *urb)
+void snd_usb_handle_sync_urb(struct snd_usb_endpoint *ep,
+ struct snd_usb_endpoint *sender,
+ const struct urb *urb)
{
- unsigned int f;
int shift;
+ unsigned int f;
unsigned long flags;
+ snd_BUG_ON(ep == sender);
+
+ /*
+ * In case the endpoint is operating in implicit feedback mode, prepare
+ * and a new outbound URB that has the same layout as the received
+ * packet and add it to the list of pending urbs.
+ */
+ if (snd_usb_endpoint_implict_feedback_sink(ep) &&
+ ep->use_count != 0) {
+
+ /* implicit feedback case */
+ int i, bytes = 0;
+ struct snd_urb_ctx *in_ctx;
+ struct snd_usb_packet_info *out_packet;
+
+ in_ctx = urb->context;
+
+ /* Count overall packet size */
+ for (i = 0; i < in_ctx->packets; i++)
+ if (urb->iso_frame_desc[i].status == 0)
+ bytes += urb->iso_frame_desc[i].actual_length;
+
+ /*
+ * skip empty packets. At least M-Audio's Fast Track Ultra stops
+ * streaming once it received a 0-byte OUT URB
+ */
+ if (bytes == 0)
+ return;
+
+ spin_lock_irqsave(&ep->lock, flags);
+ out_packet = ep->next_packet + ep->next_packet_write_pos;
+
+ /*
+ * Iterate through the inbound packet and prepare the lengths
+ * for the output packet. The OUT packet we are about to send
+ * will have the same amount of payload than the IN packet we
+ * just received.
+ */
+
+ out_packet->packets = in_ctx->packets;
+ for (i = 0; i < in_ctx->packets; i++) {
+ if (urb->iso_frame_desc[i].status == 0)
+ out_packet->packet_size[i] =
+ urb->iso_frame_desc[i].actual_length / ep->stride;
+ else
+ out_packet->packet_size[i] = 0;
+ }
+
+ ep->next_packet_write_pos++;
+ ep->next_packet_write_pos %= MAX_URBS;
+ spin_unlock_irqrestore(&ep->lock, flags);
+ queue_pending_output_urbs(ep);
+
+ return;
+ }
+
+ /*
+ * process after playback sync complete
+ *
+ * Full speed devices report feedback values in 10.14 format as samples
+ * per frame, high speed devices in 16.16 format as samples per
+ * microframe.
+ *
+ * Because the Audio Class 1 spec was written before USB 2.0, many high
+ * speed devices use a wrong interpretation, some others use an
+ * entirely different format.
+ *
+ * Therefore, we cannot predict what format any particular device uses
+ * and must detect it automatically.
+ */
+
if (urb->iso_frame_desc[0].status != 0 ||
urb->iso_frame_desc[0].actual_length < 3)
- return 0;
+ return;
f = le32_to_cpup(urb->transfer_buffer);
if (urb->iso_frame_desc[0].actual_length == 3)
f &= 0x00ffffff;
else
f &= 0x0fffffff;
+
if (f == 0)
- return 0;
+ return;
- if (unlikely(subs->freqshift == INT_MIN)) {
+ if (unlikely(ep->freqshift == INT_MIN)) {
/*
* The first time we see a feedback value, determine its format
* by shifting it left or right until it matches the nominal
@@ -569,398 +1120,34 @@ static int retire_playback_sync_urb(struct snd_usb_substream *subs,
* differ from the nominal value more than +50% or -25%.
*/
shift = 0;
- while (f < subs->freqn - subs->freqn / 4) {
+ while (f < ep->freqn - ep->freqn / 4) {
f <<= 1;
shift++;
}
- while (f > subs->freqn + subs->freqn / 2) {
+ while (f > ep->freqn + ep->freqn / 2) {
f >>= 1;
shift--;
}
- subs->freqshift = shift;
- }
- else if (subs->freqshift >= 0)
- f <<= subs->freqshift;
+ ep->freqshift = shift;
+ } else if (ep->freqshift >= 0)
+ f <<= ep->freqshift;
else
- f >>= -subs->freqshift;
+ f >>= -ep->freqshift;
- if (likely(f >= subs->freqn - subs->freqn / 8 && f <= subs->freqmax)) {
+ if (likely(f >= ep->freqn - ep->freqn / 8 && f <= ep->freqmax)) {
/*
* If the frequency looks valid, set it.
* This value is referred to in prepare_playback_urb().
*/
- spin_lock_irqsave(&subs->lock, flags);
- subs->freqm = f;
- spin_unlock_irqrestore(&subs->lock, flags);
+ spin_lock_irqsave(&ep->lock, flags);
+ ep->freqm = f;
+ spin_unlock_irqrestore(&ep->lock, flags);
} else {
/*
* Out of range; maybe the shift value is wrong.
* Reset it so that we autodetect again the next time.
*/
- subs->freqshift = INT_MIN;
- }
-
- 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);
+ ep->freqshift = INT_MIN;
}
}
-/*
- * 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;
- 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->number_of_packets = ctx->packets;
- urb->transfer_buffer_length = offs * stride;
- memset(urb->transfer_buffer,
- runtime->format == SNDRV_PCM_FORMAT_U8 ? 0x80 : 0,
- offs * stride);
- return 0;
-}
-
-/*
- * prepare urb for playback data pipe
- *
- * Since a URB can handle only a single linear buffer, we must use double
- * buffering when the data to be transferred overflows the buffer boundary.
- * To avoid inconsistencies when updating hwptr_done, we use double buffering
- * for all URBs.
- */
-static int prepare_playback_urb(struct snd_usb_substream *subs,
- struct snd_pcm_runtime *runtime,
- struct urb *urb)
-{
- int i, stride;
- unsigned int counts, frames, bytes;
- unsigned long flags;
- int period_elapsed = 0;
- struct snd_urb_ctx *ctx = urb->context;
-
- stride = runtime->frame_bits >> 3;
-
- frames = 0;
- urb->dev = ctx->subs->dev; /* we need to set this at each time */
- urb->number_of_packets = 0;
- spin_lock_irqsave(&subs->lock, flags);
- for (i = 0; i < ctx->packets; i++) {
- counts = snd_usb_audio_next_packet_size(subs);
- /* set up descriptor */
- urb->iso_frame_desc[i].offset = frames * stride;
- urb->iso_frame_desc[i].length = counts * stride;
- frames += counts;
- urb->number_of_packets++;
- subs->transfer_done += counts;
- if (subs->transfer_done >= runtime->period_size) {
- subs->transfer_done -= runtime->period_size;
- period_elapsed = 1;
- if (subs->fmt_type == UAC_FORMAT_TYPE_II) {
- if (subs->transfer_done > 0) {
- /* FIXME: fill-max mode is not
- * supported yet */
- frames -= subs->transfer_done;
- counts -= subs->transfer_done;
- urb->iso_frame_desc[i].length =
- counts * stride;
- subs->transfer_done = 0;
- }
- i++;
- if (i < ctx->packets) {
- /* add a transfer delimiter */
- urb->iso_frame_desc[i].offset =
- frames * stride;
- urb->iso_frame_desc[i].length = 0;
- urb->number_of_packets++;
- }
- break;
- }
- }
- if (period_elapsed) /* finish at the period boundary */
- break;
- }
- bytes = frames * stride;
- if (subs->hwptr_done + bytes > runtime->buffer_size * stride) {
- /* err, the transferred area goes over buffer boundary. */
- unsigned int bytes1 =
- runtime->buffer_size * stride - subs->hwptr_done;
- memcpy(urb->transfer_buffer,
- runtime->dma_area + subs->hwptr_done, bytes1);
- memcpy(urb->transfer_buffer + bytes1,
- runtime->dma_area, bytes - bytes1);
- } else {
- memcpy(urb->transfer_buffer,
- runtime->dma_area + subs->hwptr_done, bytes);
- }
- subs->hwptr_done += bytes;
- if (subs->hwptr_done >= runtime->buffer_size * stride)
- subs->hwptr_done -= runtime->buffer_size * stride;
-
- /* update delay with exact number of samples queued */
- runtime->delay = subs->last_delay;
- runtime->delay += frames;
- subs->last_delay = runtime->delay;
-
- /* realign last_frame_number */
- subs->last_frame_number = usb_get_current_frame_number(subs->dev);
- subs->last_frame_number &= 0xFF; /* keep 8 LSBs */
-
- spin_unlock_irqrestore(&subs->lock, flags);
- urb->transfer_buffer_length = bytes;
- if (period_elapsed)
- snd_pcm_period_elapsed(subs->pcm_substream);
- return 0;
-}
-
-/*
- * process after playback data complete
- * - 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;
- int est_delay;
-
- spin_lock_irqsave(&subs->lock, flags);
-
- est_delay = snd_usb_pcm_delay(subs, runtime->rate);
- /* update delay with exact number of samples played */
- if (processed > subs->last_delay)
- subs->last_delay = 0;
- else
- subs->last_delay -= processed;
- runtime->delay = subs->last_delay;
-
- /*
- * Report when delay estimate is off by more than 2ms.
- * The error should be lower than 2ms since the estimate relies
- * on two reads of a counter updated every ms.
- */
- if (abs(est_delay - subs->last_delay) * 1000 > runtime->rate * 2)
- snd_printk(KERN_DEBUG "delay: estimated %d, actual %d\n",
- est_delay, subs->last_delay);
-
- spin_unlock_irqrestore(&subs->lock, flags);
- return 0;
-}
-
-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
- */
-static int start_urbs(struct snd_usb_substream *subs, struct snd_pcm_runtime *runtime)
-{
- unsigned int i;
- int err;
-
- if (subs->stream->chip->shutdown)
- return -EBADFD;
-
- for (i = 0; i < subs->nurbs; i++) {
- 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;
- }
- }
- if (subs->syncpipe) {
- for (i = 0; i < SYNC_URBS; i++) {
- 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;
- }
- }
- }
-
- subs->active_mask = 0;
- subs->unlink_mask = 0;
- subs->running = 1;
- for (i = 0; i < subs->nurbs; i++) {
- 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++) {
- 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);
- }
- }
- return 0;
-
- __error:
- // snd_pcm_stop(subs->pcm_substream, SNDRV_PCM_STATE_XRUN);
- deactivate_urbs(subs, 0, 0);
- return -EPIPE;
-}
-
-
-/*
- */
-static struct snd_urb_ops audio_urb_ops[2] = {
- {
- .prepare = prepare_nodata_playback_urb,
- .retire = retire_playback_urb,
- .prepare_sync = prepare_playback_sync_urb,
- .retire_sync = retire_playback_sync_urb,
- },
- {
- .prepare = prepare_capture_urb,
- .retire = retire_capture_urb,
- .prepare_sync = prepare_capture_sync_urb,
- .retire_sync = retire_capture_sync_urb,
- },
-};
-
-/*
- * initialize the substream instance.
- */
-
-void snd_usb_init_substream(struct snd_usb_stream *as,
- int stream, struct audioformat *fp)
-{
- struct snd_usb_substream *subs = &as->substream[stream];
-
- INIT_LIST_HEAD(&subs->fmt_list);
- spin_lock_init(&subs->lock);
-
- subs->stream = as;
- subs->direction = stream;
- subs->dev = as->chip->dev;
- subs->txfr_quirk = as->chip->txfr_quirk;
- subs->ops = audio_urb_ops[stream];
- if (snd_usb_get_speed(subs->dev) >= USB_SPEED_HIGH)
- subs->ops.prepare_sync = prepare_capture_sync_urb_hs;
-
- snd_usb_set_pcm_ops(as->pcm, stream);
-
- list_add_tail(&fp->list, &subs->fmt_list);
- subs->formats |= fp->formats;
- subs->endpoint = fp->endpoint;
- subs->num_formats++;
- subs->fmt_type = fp->fmt_type;
-}
-
-int snd_usb_substream_playback_trigger(struct snd_pcm_substream *substream, int cmd)
-{
- struct snd_usb_substream *subs = substream->runtime->private_data;
-
- 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;
- }
-
- return -EINVAL;
-}
-
-int snd_usb_substream_capture_trigger(struct snd_pcm_substream *substream, int cmd)
-{
- struct snd_usb_substream *subs = substream->runtime->private_data;
-
- switch (cmd) {
- case SNDRV_PCM_TRIGGER_START:
- 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;
- }
-
- return -EINVAL;
-}
-
-int snd_usb_substream_prepare(struct snd_usb_substream *subs,
- struct snd_pcm_runtime *runtime)
-{
- /* clear urbs (to be sure) */
- deactivate_urbs(subs, 0, 1);
- wait_clear_urbs(subs);
-
- /* 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_nodata_playback_urb;
- return start_urbs(subs, runtime);
- }
-
- return 0;
-}
-
diff --git a/sound/usb/endpoint.h b/sound/usb/endpoint.h
index 88eb63a..ee2723f 100644
--- a/sound/usb/endpoint.h
+++ b/sound/usb/endpoint.h
@@ -1,21 +1,29 @@
#ifndef __USBAUDIO_ENDPOINT_H
#define __USBAUDIO_ENDPOINT_H
-void snd_usb_init_substream(struct snd_usb_stream *as,
- int stream,
- struct audioformat *fp);
+#define SND_USB_ENDPOINT_TYPE_DATA 0
+#define SND_USB_ENDPOINT_TYPE_SYNC 1
-int snd_usb_init_substream_urbs(struct snd_usb_substream *subs,
- unsigned int period_bytes,
- unsigned int rate,
- unsigned int frame_bits);
+struct snd_usb_endpoint *snd_usb_add_endpoint(struct snd_usb_audio *chip,
+ struct usb_host_interface *alts,
+ int ep_num, int direction, int type);
-void snd_usb_release_substream_urbs(struct snd_usb_substream *subs, int force);
+int snd_usb_endpoint_set_params(struct snd_usb_endpoint *ep,
+ struct snd_pcm_hw_params *hw_params,
+ struct audioformat *fmt,
+ struct snd_usb_endpoint *sync_ep);
-int snd_usb_substream_prepare(struct snd_usb_substream *subs,
- struct snd_pcm_runtime *runtime);
+int snd_usb_endpoint_start(struct snd_usb_endpoint *ep);
+void snd_usb_endpoint_stop(struct snd_usb_endpoint *ep,
+ int force, int can_sleep, int wait);
+int snd_usb_endpoint_activate(struct snd_usb_endpoint *ep);
+int snd_usb_endpoint_deactivate(struct snd_usb_endpoint *ep);
+void snd_usb_endpoint_free(struct list_head *head);
-int snd_usb_substream_playback_trigger(struct snd_pcm_substream *substream, int cmd);
-int snd_usb_substream_capture_trigger(struct snd_pcm_substream *substream, int cmd);
+int snd_usb_endpoint_implict_feedback_sink(struct snd_usb_endpoint *ep);
+
+void snd_usb_handle_sync_urb(struct snd_usb_endpoint *ep,
+ struct snd_usb_endpoint *sender,
+ const struct urb *urb);
#endif /* __USBAUDIO_ENDPOINT_H */
diff --git a/sound/usb/pcm.c b/sound/usb/pcm.c
index 0eed611..2d3a04d 100644
--- a/sound/usb/pcm.c
+++ b/sound/usb/pcm.c
@@ -16,6 +16,7 @@
#include <linux/init.h>
#include <linux/slab.h>
+#include <linux/ratelimit.h>
#include <linux/usb.h>
#include <linux/usb/audio.h>
#include <linux/usb/audio-v2.h>
@@ -34,6 +35,9 @@
#include "clock.h"
#include "power.h"
+#define SUBSTREAM_FLAG_DATA_EP_STARTED 0
+#define SUBSTREAM_FLAG_SYNC_EP_STARTED 1
+
/* return the estimated delay based on USB frame counters */
snd_pcm_uframes_t snd_usb_pcm_delay(struct snd_usb_substream *subs,
unsigned int rate)
@@ -208,6 +212,84 @@ int snd_usb_init_pitch(struct snd_usb_audio *chip, int iface,
}
}
+static int start_endpoints(struct snd_usb_substream *subs)
+{
+ int err;
+
+ if (!subs->data_endpoint)
+ return -EINVAL;
+
+ if (!test_and_set_bit(SUBSTREAM_FLAG_DATA_EP_STARTED, &subs->flags)) {
+ struct snd_usb_endpoint *ep = subs->data_endpoint;
+
+ snd_printdd(KERN_DEBUG "Starting data EP @%p\n", ep);
+
+ ep->data_subs = subs;
+ err = snd_usb_endpoint_start(ep);
+ if (err < 0) {
+ clear_bit(SUBSTREAM_FLAG_DATA_EP_STARTED, &subs->flags);
+ return err;
+ }
+ }
+
+ if (subs->sync_endpoint &&
+ !test_and_set_bit(SUBSTREAM_FLAG_SYNC_EP_STARTED, &subs->flags)) {
+ struct snd_usb_endpoint *ep = subs->sync_endpoint;
+
+ snd_printdd(KERN_DEBUG "Starting sync EP @%p\n", ep);
+
+ ep->sync_slave = subs->data_endpoint;
+ err = snd_usb_endpoint_start(ep);
+ if (err < 0) {
+ clear_bit(SUBSTREAM_FLAG_SYNC_EP_STARTED, &subs->flags);
+ return err;
+ }
+ }
+
+ return 0;
+}
+
+static void stop_endpoints(struct snd_usb_substream *subs,
+ int force, int can_sleep, int wait)
+{
+ if (test_and_clear_bit(SUBSTREAM_FLAG_SYNC_EP_STARTED, &subs->flags))
+ snd_usb_endpoint_stop(subs->sync_endpoint,
+ force, can_sleep, wait);
+
+ if (test_and_clear_bit(SUBSTREAM_FLAG_DATA_EP_STARTED, &subs->flags))
+ snd_usb_endpoint_stop(subs->data_endpoint,
+ force, can_sleep, wait);
+}
+
+static int activate_endpoints(struct snd_usb_substream *subs)
+{
+ if (subs->sync_endpoint) {
+ int ret;
+
+ ret = snd_usb_endpoint_activate(subs->sync_endpoint);
+ if (ret < 0)
+ return ret;
+ }
+
+ return snd_usb_endpoint_activate(subs->data_endpoint);
+}
+
+static int deactivate_endpoints(struct snd_usb_substream *subs)
+{
+ int reta, retb;
+
+ reta = snd_usb_endpoint_deactivate(subs->sync_endpoint);
+ retb = snd_usb_endpoint_deactivate(subs->data_endpoint);
+
+ if (reta < 0)
+ return reta;
+
+ if (retb < 0)
+ return retb;
+
+ return 0;
+}
+
/*
* find a matching format and set up the interface
*/
@@ -219,7 +301,7 @@ static int set_format(struct snd_usb_substream *subs, struct audioformat *fmt)
struct usb_interface *iface;
unsigned int ep, attr;
int is_playback = subs->direction == SNDRV_PCM_STREAM_PLAYBACK;
- int err;
+ int err, implicit_fb = 0;
iface = usb_ifnum_to_if(dev, fmt->iface);
if (WARN_ON(!iface))
@@ -232,40 +314,11 @@ static int set_format(struct snd_usb_substream *subs, struct audioformat *fmt)
if (fmt == subs->cur_audiofmt)
return 0;
- /* close the old interface */
- if (subs->interface >= 0 && subs->interface != fmt->iface) {
- 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->altset_idx = 0;
- }
-
- /* set interface */
- if (subs->interface != fmt->iface || subs->altset_idx != fmt->altset_idx) {
- if (usb_set_interface(dev, fmt->iface, fmt->altsetting) < 0) {
- snd_printk(KERN_ERR "%d:%d:%d: usb_set_interface failed\n",
- dev->devnum, fmt->iface, fmt->altsetting);
- return -EIO;
- }
- snd_printdd(KERN_INFO "setting usb interface %d:%d\n", fmt->iface, fmt->altsetting);
- subs->interface = fmt->iface;
- subs->altset_idx = fmt->altset_idx;
- }
-
- /* create a data pipe */
- ep = fmt->endpoint & USB_ENDPOINT_NUMBER_MASK;
- if (is_playback)
- subs->datapipe = usb_sndisocpipe(dev, ep);
- else
- subs->datapipe = usb_rcvisocpipe(dev, ep);
- subs->datainterval = fmt->datainterval;
- subs->syncpipe = subs->syncinterval = 0;
- subs->maxpacksize = fmt->maxpacksize;
- subs->syncmaxsize = 0;
- subs->fill_max = 0;
+ subs->data_endpoint = snd_usb_add_endpoint(subs->stream->chip,
+ alts, fmt->endpoint, subs->direction,
+ SND_USB_ENDPOINT_TYPE_DATA);
+ if (!subs->data_endpoint)
+ return -EINVAL;
/* we need a sync pipe in async OUT or adaptive IN mode */
/* check the number of EP, since some devices have broken
@@ -273,8 +326,25 @@ static int set_format(struct snd_usb_substream *subs, struct audioformat *fmt)
* assume it as adaptive-out or sync-in.
*/
attr = fmt->ep_attr & USB_ENDPOINT_SYNCTYPE;
+
+ switch (subs->stream->chip->usb_id) {
+ case USB_ID(0x0763, 0x2080): /* M-Audio FastTrack Ultra */
+ case USB_ID(0x0763, 0x2081):
+ if (is_playback) {
+ implicit_fb = 1;
+ ep = 0x81;
+ iface = usb_ifnum_to_if(dev, 2);
+
+ if (!iface || iface->num_altsetting == 0)
+ return -EINVAL;
+
+ alts = &iface->altsetting[1];
+ goto add_sync_ep;
+ }
+ }
+
if (((is_playback && attr == USB_ENDPOINT_SYNC_ASYNC) ||
- (! is_playback && attr == USB_ENDPOINT_SYNC_ADAPTIVE)) &&
+ (!is_playback && attr == USB_ENDPOINT_SYNC_ADAPTIVE)) &&
altsd->bNumEndpoints >= 2) {
/* check sync-pipe endpoint */
/* ... and check descriptor size before accessing bSynchAddress
@@ -282,7 +352,8 @@ static int set_format(struct snd_usb_substream *subs, struct audioformat *fmt)
the audio fields in the endpoint descriptors */
if ((get_endpoint(alts, 1)->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) != 0x01 ||
(get_endpoint(alts, 1)->bLength >= USB_DT_ENDPOINT_AUDIO_SIZE &&
- get_endpoint(alts, 1)->bSynchAddress != 0)) {
+ get_endpoint(alts, 1)->bSynchAddress != 0 &&
+ !implicit_fb)) {
snd_printk(KERN_ERR "%d:%d:%d : invalid synch pipe\n",
dev->devnum, fmt->iface, fmt->altsetting);
return -EINVAL;
@@ -290,33 +361,27 @@ static int set_format(struct snd_usb_substream *subs, struct audioformat *fmt)
ep = get_endpoint(alts, 1)->bEndpointAddress;
if (get_endpoint(alts, 0)->bLength >= USB_DT_ENDPOINT_AUDIO_SIZE &&
(( is_playback && ep != (unsigned int)(get_endpoint(alts, 0)->bSynchAddress | USB_DIR_IN)) ||
- (!is_playback && ep != (unsigned int)(get_endpoint(alts, 0)->bSynchAddress & ~USB_DIR_IN)))) {
+ (!is_playback && ep != (unsigned int)(get_endpoint(alts, 0)->bSynchAddress & ~USB_DIR_IN)) ||
+ ( is_playback && !implicit_fb))) {
snd_printk(KERN_ERR "%d:%d:%d : invalid synch pipe\n",
dev->devnum, fmt->iface, fmt->altsetting);
return -EINVAL;
}
- ep &= USB_ENDPOINT_NUMBER_MASK;
- if (is_playback)
- subs->syncpipe = usb_rcvisocpipe(dev, ep);
- else
- subs->syncpipe = usb_sndisocpipe(dev, ep);
- if (get_endpoint(alts, 1)->bLength >= USB_DT_ENDPOINT_AUDIO_SIZE &&
- get_endpoint(alts, 1)->bRefresh >= 1 &&
- get_endpoint(alts, 1)->bRefresh <= 9)
- subs->syncinterval = get_endpoint(alts, 1)->bRefresh;
- else if (snd_usb_get_speed(subs->dev) == USB_SPEED_FULL)
- subs->syncinterval = 1;
- else if (get_endpoint(alts, 1)->bInterval >= 1 &&
- get_endpoint(alts, 1)->bInterval <= 16)
- subs->syncinterval = get_endpoint(alts, 1)->bInterval - 1;
- else
- subs->syncinterval = 3;
- subs->syncmaxsize = le16_to_cpu(get_endpoint(alts, 1)->wMaxPacketSize);
- }
-
- /* always fill max packet size */
- if (fmt->attributes & UAC_EP_CS_ATTR_FILL_MAX)
- subs->fill_max = 1;
+
+ implicit_fb = (get_endpoint(alts, 1)->bmAttributes & USB_ENDPOINT_USAGE_MASK)
+ == USB_ENDPOINT_USAGE_IMPLICIT_FB;
+
+add_sync_ep:
+ subs->sync_endpoint = snd_usb_add_endpoint(subs->stream->chip,
+ alts, ep, !subs->direction,
+ implicit_fb ?
+ SND_USB_ENDPOINT_TYPE_DATA :
+ SND_USB_ENDPOINT_TYPE_SYNC);
+ if (!subs->sync_endpoint)
+ return -EINVAL;
+
+ subs->data_endpoint->sync_master = subs->sync_endpoint;
+ }
if ((err = snd_usb_init_pitch(subs->stream->chip, subs->interface, alts, fmt)) < 0)
return err;
@@ -390,12 +455,22 @@ static int snd_usb_hw_params(struct snd_pcm_substream *substream,
if (changed) {
mutex_lock(&subs->stream->chip->shutdown_mutex);
/* format changed */
- snd_usb_release_substream_urbs(subs, 0);
- /* influenced: period_bytes, channels, rate, format, */
- ret = snd_usb_init_substream_urbs(subs, params_period_bytes(hw_params),
- params_rate(hw_params),
- snd_pcm_format_physical_width(params_format(hw_params)) *
- params_channels(hw_params));
+ stop_endpoints(subs, 0, 0, 0);
+ deactivate_endpoints(subs);
+
+ ret = activate_endpoints(subs);
+ if (ret < 0)
+ goto unlock;
+
+ ret = snd_usb_endpoint_set_params(subs->data_endpoint, hw_params, fmt,
+ subs->sync_endpoint);
+ if (ret < 0)
+ goto unlock;
+
+ if (subs->sync_endpoint)
+ ret = snd_usb_endpoint_set_params(subs->sync_endpoint,
+ hw_params, fmt, NULL);
+unlock:
mutex_unlock(&subs->stream->chip->shutdown_mutex);
}
@@ -415,7 +490,7 @@ static int snd_usb_hw_free(struct snd_pcm_substream *substream)
subs->cur_rate = 0;
subs->period_bytes = 0;
mutex_lock(&subs->stream->chip->shutdown_mutex);
- snd_usb_release_substream_urbs(subs, 0);
+ stop_endpoints(subs, 0, 1, 1);
mutex_unlock(&subs->stream->chip->shutdown_mutex);
return snd_pcm_lib_free_vmalloc_buffer(substream);
}
@@ -435,19 +510,28 @@ static int snd_usb_pcm_prepare(struct snd_pcm_substream *substream)
return -ENXIO;
}
+ if (snd_BUG_ON(!subs->data_endpoint))
+ return -EIO;
+
/* some unit conversions in runtime */
- subs->maxframesize = bytes_to_frames(runtime, subs->maxpacksize);
- subs->curframesize = bytes_to_frames(runtime, subs->curpacksize);
+ subs->data_endpoint->maxframesize =
+ bytes_to_frames(runtime, subs->data_endpoint->maxpacksize);
+ subs->data_endpoint->curframesize =
+ bytes_to_frames(runtime, subs->data_endpoint->curpacksize);
/* reset the pointer */
subs->hwptr_done = 0;
subs->transfer_done = 0;
- subs->phase = 0;
subs->last_delay = 0;
subs->last_frame_number = 0;
runtime->delay = 0;
- return snd_usb_substream_prepare(subs, runtime);
+ /* 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)
+ return start_endpoints(subs);
+
+ return 0;
}
static struct snd_pcm_hardware snd_usb_hardware =
@@ -842,16 +926,171 @@ static int snd_usb_pcm_open(struct snd_pcm_substream *substream, int direction)
static int snd_usb_pcm_close(struct snd_pcm_substream *substream, int direction)
{
+ int ret;
struct snd_usb_stream *as = snd_pcm_substream_chip(substream);
struct snd_usb_substream *subs = &as->substream[direction];
- if (!as->chip->shutdown && subs->interface >= 0) {
- usb_set_interface(subs->dev, subs->interface, 0);
- subs->interface = -1;
- }
+ stop_endpoints(subs, 0, 0, 0);
+ ret = deactivate_endpoints(subs);
subs->pcm_substream = NULL;
snd_usb_autosuspend(subs->stream->chip);
- return 0;
+
+ return ret;
+}
+
+/* Since a URB can handle only a single linear buffer, we must use double
+ * buffering when the data to be transferred overflows the buffer boundary.
+ * To avoid inconsistencies when updating hwptr_done, we use double buffering
+ * for all URBs.
+ */
+static void retire_capture_urb(struct snd_usb_substream *subs,
+ struct urb *urb)
+{
+ struct snd_pcm_runtime *runtime = subs->pcm_substream->runtime;
+ unsigned int stride, frames, bytes, oldptr;
+ int i, period_elapsed = 0;
+ unsigned long flags;
+ unsigned char *cp;
+
+ stride = runtime->frame_bits >> 3;
+
+ for (i = 0; i < urb->number_of_packets; i++) {
+ cp = (unsigned char *)urb->transfer_buffer + urb->iso_frame_desc[i].offset;
+ if (urb->iso_frame_desc[i].status && printk_ratelimit()) {
+ snd_printdd(KERN_ERR "frame %d active: %d\n", i, urb->iso_frame_desc[i].status);
+ // continue;
+ }
+ bytes = urb->iso_frame_desc[i].actual_length;
+ frames = bytes / stride;
+ if (!subs->txfr_quirk)
+ bytes = frames * stride;
+ if (bytes % (runtime->sample_bits >> 3) != 0) {
+#ifdef CONFIG_SND_DEBUG_VERBOSE
+ int oldbytes = bytes;
+#endif
+ bytes = frames * stride;
+ snd_printdd(KERN_ERR "Corrected urb data len. %d->%d\n",
+ oldbytes, bytes);
+ }
+ /* update the current pointer */
+ spin_lock_irqsave(&subs->lock, flags);
+ oldptr = subs->hwptr_done;
+ subs->hwptr_done += bytes;
+ if (subs->hwptr_done >= runtime->buffer_size * stride)
+ subs->hwptr_done -= runtime->buffer_size * stride;
+ frames = (bytes + (oldptr % stride)) / stride;
+ subs->transfer_done += frames;
+ if (subs->transfer_done >= runtime->period_size) {
+ subs->transfer_done -= runtime->period_size;
+ period_elapsed = 1;
+ }
+ spin_unlock_irqrestore(&subs->lock, flags);
+ /* copy a data chunk */
+ if (oldptr + bytes > runtime->buffer_size * stride) {
+ unsigned int bytes1 =
+ runtime->buffer_size * stride - oldptr;
+ memcpy(runtime->dma_area + oldptr, cp, bytes1);
+ memcpy(runtime->dma_area, cp + bytes1, bytes - bytes1);
+ } else {
+ memcpy(runtime->dma_area + oldptr, cp, bytes);
+ }
+ }
+
+ if (period_elapsed)
+ snd_pcm_period_elapsed(subs->pcm_substream);
+}
+
+static void prepare_playback_urb(struct snd_usb_substream *subs,
+ struct urb *urb)
+{
+ struct snd_pcm_runtime *runtime = subs->pcm_substream->runtime;
+ struct snd_urb_ctx *ctx = urb->context;
+ unsigned int counts, frames, bytes;
+ int i, stride, period_elapsed = 0;
+ unsigned long flags;
+
+ stride = runtime->frame_bits >> 3;
+
+ frames = 0;
+ urb->number_of_packets = 0;
+ spin_lock_irqsave(&subs->lock, flags);
+ for (i = 0; i < ctx->packets; i++) {
+ counts = ctx->packet_size[i];
+ /* set up descriptor */
+ urb->iso_frame_desc[i].offset = frames * stride;
+ urb->iso_frame_desc[i].length = counts * stride;
+ frames += counts;
+ urb->number_of_packets++;
+ subs->transfer_done += counts;
+ if (subs->transfer_done >= runtime->period_size) {
+ subs->transfer_done -= runtime->period_size;
+ period_elapsed = 1;
+ if (subs->fmt_type == UAC_FORMAT_TYPE_II) {
+ if (subs->transfer_done > 0) {
+ /* FIXME: fill-max mode is not
+ * supported yet */
+ frames -= subs->transfer_done;
+ counts -= subs->transfer_done;
+ urb->iso_frame_desc[i].length =
+ counts * stride;
+ subs->transfer_done = 0;
+ }
+ i++;
+ if (i < ctx->packets) {
+ /* add a transfer delimiter */
+ urb->iso_frame_desc[i].offset =
+ frames * stride;
+ urb->iso_frame_desc[i].length = 0;
+ urb->number_of_packets++;
+ }
+ break;
+ }
+ }
+ if (period_elapsed &&
+ !snd_usb_endpoint_implict_feedback_sink(subs->data_endpoint)) /* finish at the period boundary */
+ break;
+ }
+ bytes = frames * stride;
+ if (subs->hwptr_done + bytes > runtime->buffer_size * stride) {
+ /* err, the transferred area goes over buffer boundary. */
+ unsigned int bytes1 =
+ runtime->buffer_size * stride - subs->hwptr_done;
+ memcpy(urb->transfer_buffer,
+ runtime->dma_area + subs->hwptr_done, bytes1);
+ memcpy(urb->transfer_buffer + bytes1,
+ runtime->dma_area, bytes - bytes1);
+ } else {
+ memcpy(urb->transfer_buffer,
+ runtime->dma_area + subs->hwptr_done, bytes);
+ }
+ subs->hwptr_done += bytes;
+ if (subs->hwptr_done >= runtime->buffer_size * stride)
+ subs->hwptr_done -= runtime->buffer_size * stride;
+ runtime->delay += frames;
+ spin_unlock_irqrestore(&subs->lock, flags);
+ urb->transfer_buffer_length = bytes;
+ if (period_elapsed)
+ snd_pcm_period_elapsed(subs->pcm_substream);
+}
+
+/*
+ * process after playback data complete
+ * - decrease the delay count again
+ */
+static void retire_playback_urb(struct snd_usb_substream *subs,
+ struct urb *urb)
+{
+ unsigned long flags;
+ struct snd_pcm_runtime *runtime = subs->pcm_substream->runtime;
+ 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);
}
static int snd_usb_playback_open(struct snd_pcm_substream *substream)
@@ -874,6 +1113,56 @@ static int snd_usb_capture_close(struct snd_pcm_substream *substream)
return snd_usb_pcm_close(substream, SNDRV_PCM_STREAM_CAPTURE);
}
+static int snd_usb_substream_playback_trigger(struct snd_pcm_substream *substream,
+ int cmd)
+{
+ struct snd_usb_substream *subs = substream->runtime->private_data;
+
+ switch (cmd) {
+ case SNDRV_PCM_TRIGGER_START:
+ case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
+ subs->data_endpoint->prepare_data_urb = prepare_playback_urb;
+ subs->data_endpoint->retire_data_urb = retire_playback_urb;
+ return 0;
+ case SNDRV_PCM_TRIGGER_STOP:
+ stop_endpoints(subs, 0, 0, 0);
+ return 0;
+ case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
+ subs->data_endpoint->prepare_data_urb = NULL;
+ subs->data_endpoint->retire_data_urb = NULL;
+ return 0;
+ }
+
+ return -EINVAL;
+}
+
+int snd_usb_substream_capture_trigger(struct snd_pcm_substream *substream, int cmd)
+{
+ int err;
+ struct snd_usb_substream *subs = substream->runtime->private_data;
+
+ switch (cmd) {
+ case SNDRV_PCM_TRIGGER_START:
+ err = start_endpoints(subs);
+ if (err < 0)
+ return err;
+
+ subs->data_endpoint->retire_data_urb = retire_capture_urb;
+ return 0;
+ case SNDRV_PCM_TRIGGER_STOP:
+ stop_endpoints(subs, 0, 0, 0);
+ return 0;
+ case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
+ subs->data_endpoint->retire_data_urb = NULL;
+ return 0;
+ case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
+ subs->data_endpoint->retire_data_urb = retire_capture_urb;
+ return 0;
+ }
+
+ return -EINVAL;
+}
+
static struct snd_pcm_ops snd_usb_playback_ops = {
.open = snd_usb_playback_open,
.close = snd_usb_playback_close,
diff --git a/sound/usb/proc.c b/sound/usb/proc.c
index 961c9a2..06e23d8 100644
--- a/sound/usb/proc.c
+++ b/sound/usb/proc.c
@@ -115,6 +115,25 @@ static void proc_dump_substream_formats(struct snd_usb_substream *subs, struct s
}
}
+static void proc_dump_ep_status(struct snd_usb_substream *subs,
+ struct snd_usb_endpoint *ep,
+ struct snd_info_buffer *buffer)
+{
+ if (!ep)
+ return;
+ snd_iprintf(buffer, " Packet Size = %d\n", ep->curpacksize);
+ snd_iprintf(buffer, " Momentary freq = %u Hz (%#x.%04x)\n",
+ snd_usb_get_speed(subs->dev) == USB_SPEED_FULL
+ ? get_full_speed_hz(ep->freqm)
+ : get_high_speed_hz(ep->freqm),
+ ep->freqm >> 16, ep->freqm & 0xffff);
+ if (ep->freqshift != INT_MIN) {
+ int res = 16 - ep->freqshift;
+ snd_iprintf(buffer, " Feedback Format = %d.%d\n",
+ (ep->syncmaxsize > 3 ? 32 : 24) - res, res);
+ }
+}
+
static void proc_dump_substream_status(struct snd_usb_substream *subs, struct snd_info_buffer *buffer)
{
if (subs->running) {
@@ -126,17 +145,8 @@ static void proc_dump_substream_status(struct snd_usb_substream *subs, struct sn
for (i = 0; i < subs->nurbs; i++)
snd_iprintf(buffer, "%d ", subs->dataurb[i].packets);
snd_iprintf(buffer, "]\n");
- snd_iprintf(buffer, " Packet Size = %d\n", subs->curpacksize);
- snd_iprintf(buffer, " Momentary freq = %u Hz (%#x.%04x)\n",
- snd_usb_get_speed(subs->dev) == USB_SPEED_FULL
- ? get_full_speed_hz(subs->freqm)
- : get_high_speed_hz(subs->freqm),
- subs->freqm >> 16, subs->freqm & 0xffff);
- if (subs->freqshift != INT_MIN)
- snd_iprintf(buffer, " Feedback Format = %d.%d\n",
- (subs->syncmaxsize > 3 ? 32 : 24)
- - (16 - subs->freqshift),
- 16 - subs->freqshift);
+ proc_dump_ep_status(subs, subs->data_endpoint, buffer);
+ proc_dump_ep_status(subs, subs->sync_endpoint, buffer);
} else {
snd_iprintf(buffer, " Status: Stop\n");
}
diff --git a/sound/usb/stream.c b/sound/usb/stream.c
index 5ff8010..6b7d7a2 100644
--- a/sound/usb/stream.c
+++ b/sound/usb/stream.c
@@ -73,6 +73,31 @@ static void snd_usb_audio_pcm_free(struct snd_pcm *pcm)
}
}
+/*
+ * initialize the substream instance.
+ */
+
+static void snd_usb_init_substream(struct snd_usb_stream *as,
+ int stream,
+ struct audioformat *fp)
+{
+ struct snd_usb_substream *subs = &as->substream[stream];
+
+ INIT_LIST_HEAD(&subs->fmt_list);
+ spin_lock_init(&subs->lock);
+
+ subs->stream = as;
+ subs->direction = stream;
+ subs->dev = as->chip->dev;
+ subs->txfr_quirk = as->chip->txfr_quirk;
+
+ snd_usb_set_pcm_ops(as->pcm, stream);
+
+ list_add_tail(&fp->list, &subs->fmt_list);
+ subs->formats |= fp->formats;
+ subs->num_formats++;
+ subs->fmt_type = fp->fmt_type;
+}
/*
* add this endpoint to the chip instance.
@@ -94,9 +119,9 @@ int snd_usb_add_audio_stream(struct snd_usb_audio *chip,
if (as->fmt_type != fp->fmt_type)
continue;
subs = &as->substream[stream];
- if (!subs->endpoint)
+ if (!subs->data_endpoint)
continue;
- if (subs->endpoint == fp->endpoint) {
+ if (subs->data_endpoint->ep_num == fp->endpoint) {
list_add_tail(&fp->list, &subs->fmt_list);
subs->num_formats++;
subs->formats |= fp->formats;
@@ -109,7 +134,7 @@ int snd_usb_add_audio_stream(struct snd_usb_audio *chip,
if (as->fmt_type != fp->fmt_type)
continue;
subs = &as->substream[stream];
- if (subs->endpoint)
+ if (subs->data_endpoint)
continue;
err = snd_pcm_new_stream(as->pcm, stream, 1);
if (err < 0)
diff --git a/sound/usb/usbaudio.h b/sound/usb/usbaudio.h
index 3e2b035..b8233eb 100644
--- a/sound/usb/usbaudio.h
+++ b/sound/usb/usbaudio.h
@@ -36,6 +36,7 @@ struct snd_usb_audio {
struct snd_card *card;
struct usb_interface *pm_intf;
u32 usb_id;
+ struct mutex mutex;
struct mutex shutdown_mutex;
unsigned int shutdown:1;
unsigned int probing:1;
@@ -46,6 +47,7 @@ struct snd_usb_audio {
int num_suspended_intf;
struct list_head pcm_list; /* list of pcm streams */
+ struct list_head ep_list; /* list of audio-related endpoints */
int pcm_devs;
struct list_head midi_list; /* list of midi interfaces */
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