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@@ -20,9 +20,11 @@
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#include <linux/ratelimit.h>
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#include <linux/usb.h>
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#include <linux/usb/audio.h>
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+#include <linux/slab.h>
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#include <sound/core.h>
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#include <sound/pcm.h>
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+#include <sound/pcm_params.h>
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#include "usbaudio.h"
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#include "helper.h"
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@@ -30,6 +32,36 @@
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#include "endpoint.h"
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#include "pcm.h"
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+#define EP_FLAG_ACTIVATED 0
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+#define EP_FLAG_RUNNING 1
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+
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+/*
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+ * snd_usb_endpoint is a model that abstracts everything related to an
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+ * USB endpoint and its streaming.
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+ *
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+ * There are functions to activate and deactivate the streaming URBs and
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+ * optional callbacks to let the pcm logic handle the actual content of the
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+ * packets for playback and record. Thus, the bus streaming and the audio
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+ * handlers are fully decoupled.
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+ *
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+ * There are two different types of endpoints in audio applications.
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+ *
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+ * SND_USB_ENDPOINT_TYPE_DATA handles full audio data payload for both
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+ * inbound and outbound traffic.
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+ *
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+ * SND_USB_ENDPOINT_TYPE_SYNC endpoints are for inbound traffic only and
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+ * expect the payload to carry Q10.14 / Q16.16 formatted sync information
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+ * (3 or 4 bytes).
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+ *
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+ * Each endpoint has to be configured prior to being used by calling
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+ * snd_usb_endpoint_set_params().
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+ *
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+ * The model incorporates a reference counting, so that multiple users
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+ * can call snd_usb_endpoint_start() and snd_usb_endpoint_stop(), and
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+ * only the first user will effectively start the URBs, and only the last
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+ * one to stop it will tear the URBs down again.
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+ */
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+
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/*
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* convert a sampling rate into our full speed format (fs/1000 in Q16.16)
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* this will overflow at approx 524 kHz
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@@ -49,71 +81,415 @@ static inline unsigned get_usb_high_speed_rate(unsigned int rate)
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}
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/*
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- * unlink active urbs.
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+ * release a urb data
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*/
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-static int deactivate_urbs(struct snd_usb_substream *subs, int force, int can_sleep)
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+static void release_urb_ctx(struct snd_urb_ctx *u)
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{
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- struct snd_usb_audio *chip = subs->stream->chip;
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- unsigned int i;
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- int async;
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+ if (u->buffer_size)
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+ usb_free_coherent(u->ep->chip->dev, u->buffer_size,
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+ u->urb->transfer_buffer,
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+ u->urb->transfer_dma);
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+ usb_free_urb(u->urb);
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+ u->urb = NULL;
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+}
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+
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+static const char *usb_error_string(int err)
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+{
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+ switch (err) {
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+ case -ENODEV:
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+ return "no device";
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+ case -ENOENT:
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+ return "endpoint not enabled";
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+ case -EPIPE:
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+ return "endpoint stalled";
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+ case -ENOSPC:
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+ return "not enough bandwidth";
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+ case -ESHUTDOWN:
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+ return "device disabled";
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+ case -EHOSTUNREACH:
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+ return "device suspended";
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+ case -EINVAL:
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+ case -EAGAIN:
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+ case -EFBIG:
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+ case -EMSGSIZE:
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+ return "internal error";
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+ default:
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+ return "unknown error";
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+ }
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+}
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+
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+/**
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+ * snd_usb_endpoint_implicit_feedback_sink: Report endpoint usage type
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+ *
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+ * @ep: The snd_usb_endpoint
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+ *
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+ * Determine whether an endpoint is driven by an implicit feedback
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+ * data endpoint source.
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+ */
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+int snd_usb_endpoint_implict_feedback_sink(struct snd_usb_endpoint *ep)
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+{
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+ return ep->sync_master &&
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+ ep->sync_master->type == SND_USB_ENDPOINT_TYPE_DATA &&
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+ ep->type == SND_USB_ENDPOINT_TYPE_DATA &&
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+ usb_pipeout(ep->pipe);
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+}
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- subs->running = 0;
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+/*
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+ * For streaming based on information derived from sync endpoints,
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+ * prepare_outbound_urb_sizes() will call next_packet_size() to
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+ * determine the number of samples to be sent in the next packet.
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+ *
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+ * For implicit feedback, next_packet_size() is unused.
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+ */
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+static int next_packet_size(struct snd_usb_endpoint *ep)
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+{
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+ unsigned long flags;
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+ int ret;
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- if (!force && subs->stream->chip->shutdown) /* to be sure... */
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- return -EBADFD;
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+ if (ep->fill_max)
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+ return ep->maxframesize;
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- async = !can_sleep && chip->async_unlink;
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+ spin_lock_irqsave(&ep->lock, flags);
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+ ep->phase = (ep->phase & 0xffff)
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+ + (ep->freqm << ep->datainterval);
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+ ret = min(ep->phase >> 16, ep->maxframesize);
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+ spin_unlock_irqrestore(&ep->lock, flags);
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- if (!async && in_interrupt())
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- return 0;
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+ return ret;
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+}
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- for (i = 0; i < subs->nurbs; i++) {
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- if (test_bit(i, &subs->active_mask)) {
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- if (!test_and_set_bit(i, &subs->unlink_mask)) {
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- struct urb *u = subs->dataurb[i].urb;
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- if (async)
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- usb_unlink_urb(u);
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- else
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- usb_kill_urb(u);
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+static void retire_outbound_urb(struct snd_usb_endpoint *ep,
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+ struct snd_urb_ctx *urb_ctx)
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+{
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+ if (ep->retire_data_urb)
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+ ep->retire_data_urb(ep->data_subs, urb_ctx->urb);
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+}
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+
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+static void retire_inbound_urb(struct snd_usb_endpoint *ep,
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+ struct snd_urb_ctx *urb_ctx)
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+{
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+ struct urb *urb = urb_ctx->urb;
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+
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+ if (ep->sync_slave)
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+ snd_usb_handle_sync_urb(ep->sync_slave, ep, urb);
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+
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+ if (ep->retire_data_urb)
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+ ep->retire_data_urb(ep->data_subs, urb);
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+}
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+
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+static void prepare_outbound_urb_sizes(struct snd_usb_endpoint *ep,
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+ struct snd_urb_ctx *ctx)
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+{
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+ int i;
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+
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+ for (i = 0; i < ctx->packets; ++i)
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+ ctx->packet_size[i] = next_packet_size(ep);
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+}
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+
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+/*
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+ * Prepare a PLAYBACK urb for submission to the bus.
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+ */
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+static void prepare_outbound_urb(struct snd_usb_endpoint *ep,
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+ struct snd_urb_ctx *ctx)
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+{
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+ int i;
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+ struct urb *urb = ctx->urb;
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+ unsigned char *cp = urb->transfer_buffer;
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+
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+ urb->dev = ep->chip->dev; /* we need to set this at each time */
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+
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+ switch (ep->type) {
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+ case SND_USB_ENDPOINT_TYPE_DATA:
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+ if (ep->prepare_data_urb) {
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+ ep->prepare_data_urb(ep->data_subs, urb);
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+ } else {
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+ /* no data provider, so send silence */
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+ unsigned int offs = 0;
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+ for (i = 0; i < ctx->packets; ++i) {
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+ int counts = ctx->packet_size[i];
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+ urb->iso_frame_desc[i].offset = offs * ep->stride;
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+ urb->iso_frame_desc[i].length = counts * ep->stride;
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+ offs += counts;
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}
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+
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+ urb->number_of_packets = ctx->packets;
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+ urb->transfer_buffer_length = offs * ep->stride;
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+ memset(urb->transfer_buffer, ep->silence_value,
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+ offs * ep->stride);
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}
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+ break;
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+
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+ case SND_USB_ENDPOINT_TYPE_SYNC:
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+ if (snd_usb_get_speed(ep->chip->dev) >= USB_SPEED_HIGH) {
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+ /*
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+ * fill the length and offset of each urb descriptor.
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+ * the fixed 12.13 frequency is passed as 16.16 through the pipe.
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+ */
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+ urb->iso_frame_desc[0].length = 4;
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+ urb->iso_frame_desc[0].offset = 0;
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+ cp[0] = ep->freqn;
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+ cp[1] = ep->freqn >> 8;
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+ cp[2] = ep->freqn >> 16;
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+ cp[3] = ep->freqn >> 24;
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+ } else {
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+ /*
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+ * fill the length and offset of each urb descriptor.
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+ * the fixed 10.14 frequency is passed through the pipe.
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+ */
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+ urb->iso_frame_desc[0].length = 3;
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+ urb->iso_frame_desc[0].offset = 0;
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+ cp[0] = ep->freqn >> 2;
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+ cp[1] = ep->freqn >> 10;
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+ cp[2] = ep->freqn >> 18;
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+ }
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+
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+ break;
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}
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- if (subs->syncpipe) {
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- for (i = 0; i < SYNC_URBS; i++) {
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- if (test_bit(i+16, &subs->active_mask)) {
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- if (!test_and_set_bit(i+16, &subs->unlink_mask)) {
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- struct urb *u = subs->syncurb[i].urb;
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- if (async)
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- usb_unlink_urb(u);
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- else
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- usb_kill_urb(u);
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- }
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- }
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+}
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+
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+/*
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+ * Prepare a CAPTURE or SYNC urb for submission to the bus.
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+ */
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+static inline void prepare_inbound_urb(struct snd_usb_endpoint *ep,
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+ struct snd_urb_ctx *urb_ctx)
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+{
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+ int i, offs;
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+ struct urb *urb = urb_ctx->urb;
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+
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+ urb->dev = ep->chip->dev; /* we need to set this at each time */
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+
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+ switch (ep->type) {
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+ case SND_USB_ENDPOINT_TYPE_DATA:
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+ offs = 0;
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+ for (i = 0; i < urb_ctx->packets; i++) {
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+ urb->iso_frame_desc[i].offset = offs;
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+ urb->iso_frame_desc[i].length = ep->curpacksize;
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+ offs += ep->curpacksize;
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}
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+
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+ urb->transfer_buffer_length = offs;
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+ urb->number_of_packets = urb_ctx->packets;
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+ break;
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+
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+ case SND_USB_ENDPOINT_TYPE_SYNC:
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+ urb->iso_frame_desc[0].length = min(4u, ep->syncmaxsize);
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+ urb->iso_frame_desc[0].offset = 0;
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+ break;
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}
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- return 0;
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}
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+/*
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+ * Send output urbs that have been prepared previously. URBs are dequeued
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+ * from ep->ready_playback_urbs and in case there there aren't any available
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+ * or there are no packets that have been prepared, this function does
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+ * nothing.
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+ *
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+ * The reason why the functionality of sending and preparing URBs is separated
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+ * is that host controllers don't guarantee the order in which they return
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+ * inbound and outbound packets to their submitters.
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+ *
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+ * This function is only used for implicit feedback endpoints. For endpoints
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+ * driven by dedicated sync endpoints, URBs are immediately re-submitted
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+ * from their completion handler.
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+ */
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+static void queue_pending_output_urbs(struct snd_usb_endpoint *ep)
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+{
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+ while (test_bit(EP_FLAG_RUNNING, &ep->flags)) {
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+
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+ unsigned long flags;
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+ struct snd_usb_packet_info *uninitialized_var(packet);
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+ struct snd_urb_ctx *ctx = NULL;
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+ struct urb *urb;
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+ int err, i;
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+
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+ spin_lock_irqsave(&ep->lock, flags);
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+ if (ep->next_packet_read_pos != ep->next_packet_write_pos) {
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+ packet = ep->next_packet + ep->next_packet_read_pos;
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+ ep->next_packet_read_pos++;
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+ ep->next_packet_read_pos %= MAX_URBS;
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+
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+ /* take URB out of FIFO */
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+ if (!list_empty(&ep->ready_playback_urbs))
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+ ctx = list_first_entry(&ep->ready_playback_urbs,
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+ struct snd_urb_ctx, ready_list);
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+ }
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+ spin_unlock_irqrestore(&ep->lock, flags);
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+
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+ if (ctx == NULL)
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+ return;
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+
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+ list_del_init(&ctx->ready_list);
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+ urb = ctx->urb;
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+
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+ /* copy over the length information */
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+ for (i = 0; i < packet->packets; i++)
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+ ctx->packet_size[i] = packet->packet_size[i];
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+
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+ /* call the data handler to fill in playback data */
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+ prepare_outbound_urb(ep, ctx);
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+
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+ err = usb_submit_urb(ctx->urb, GFP_ATOMIC);
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+ if (err < 0)
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+ snd_printk(KERN_ERR "Unable to submit urb #%d: %d (urb %p)\n",
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+ ctx->index, err, ctx->urb);
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+ else
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+ set_bit(ctx->index, &ep->active_mask);
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+ }
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+}
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/*
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- * release a urb data
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+ * complete callback for urbs
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*/
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-static void release_urb_ctx(struct snd_urb_ctx *u)
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+static void snd_complete_urb(struct urb *urb)
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+{
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+ struct snd_urb_ctx *ctx = urb->context;
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+ struct snd_usb_endpoint *ep = ctx->ep;
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+ int err;
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+
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+ if (unlikely(urb->status == -ENOENT || /* unlinked */
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+ urb->status == -ENODEV || /* device removed */
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+ urb->status == -ECONNRESET || /* unlinked */
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+ urb->status == -ESHUTDOWN || /* device disabled */
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+ ep->chip->shutdown)) /* device disconnected */
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+ goto exit_clear;
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+
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+ if (usb_pipeout(ep->pipe)) {
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+ retire_outbound_urb(ep, ctx);
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+ /* can be stopped during retire callback */
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+ if (unlikely(!test_bit(EP_FLAG_RUNNING, &ep->flags)))
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+ goto exit_clear;
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+
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+ if (snd_usb_endpoint_implict_feedback_sink(ep)) {
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+ unsigned long flags;
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+
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+ spin_lock_irqsave(&ep->lock, flags);
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+ list_add_tail(&ctx->ready_list, &ep->ready_playback_urbs);
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+ spin_unlock_irqrestore(&ep->lock, flags);
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+ queue_pending_output_urbs(ep);
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+
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+ goto exit_clear;
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+ }
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+
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+ prepare_outbound_urb_sizes(ep, ctx);
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+ prepare_outbound_urb(ep, ctx);
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+ } else {
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+ retire_inbound_urb(ep, ctx);
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+ /* can be stopped during retire callback */
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+ if (unlikely(!test_bit(EP_FLAG_RUNNING, &ep->flags)))
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+ goto exit_clear;
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+
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+ prepare_inbound_urb(ep, ctx);
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+ }
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+
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+ err = usb_submit_urb(urb, GFP_ATOMIC);
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+ if (err == 0)
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+ return;
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+
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+ snd_printk(KERN_ERR "cannot submit urb (err = %d)\n", err);
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+ //snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN);
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+
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+exit_clear:
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+ clear_bit(ctx->index, &ep->active_mask);
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+}
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+
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+/**
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+ * snd_usb_add_endpoint: Add an endpoint to an USB audio chip
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+ *
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+ * @chip: The chip
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+ * @alts: The USB host interface
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+ * @ep_num: The number of the endpoint to use
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+ * @direction: SNDRV_PCM_STREAM_PLAYBACK or SNDRV_PCM_STREAM_CAPTURE
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|
|
+ * @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 +497,148 @@ 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 +655,472 @@ 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_usb_endpoint
|
|
|
+ *
|
|
|
+ * @ep: the snd_usb_endpoint to configure
|
|
|
+ * @hw_params: the hardware parameters
|
|
|
+ * @fmt: the USB audio format information
|
|
|
+ * @sync_ep: the sync endpoint to use, if any
|
|
|
*
|
|
|
- * 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 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 it is 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 return and queue the playback urbs
|
|
|
+ * 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 be 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
|
|
|
+ * a new outbound URB that has the same layout as the received packet
|
|
|
+ * and add it to the list of pending urbs. queue_pending_output_urbs()
|
|
|
+ * will take care of them later.
|
|
|
+ */
|
|
|
+ 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 bytes 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 +1128,34 @@ 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;
|
|
|
-}
|
|
|
-
|
Takashi Iwai