unsigned int hwptr_done;
subs = (struct snd_usb_substream *)substream->runtime->private_data;
+ if (subs->stream->chip->shutdown)
+ return SNDRV_PCM_POS_XRUN;
spin_lock(&subs->lock);
hwptr_done = subs->hwptr_done;
substream->runtime->delay = snd_usb_pcm_delay(subs,
/*
* find a matching audio format
*/
-static struct audioformat *find_format(struct snd_usb_substream *subs, unsigned int format,
- unsigned int rate, unsigned int channels)
+static struct audioformat *find_format(struct snd_usb_substream *subs)
{
struct list_head *p;
struct audioformat *found = NULL;
list_for_each(p, &subs->fmt_list) {
struct audioformat *fp;
fp = list_entry(p, struct audioformat, list);
- if (!(fp->formats & (1uLL << format)))
+ if (!(fp->formats & (1uLL << subs->pcm_format)))
continue;
- if (fp->channels != channels)
+ if (fp->channels != subs->channels)
continue;
- if (rate < fp->rate_min || rate > fp->rate_max)
+ if (subs->cur_rate < fp->rate_min ||
+ subs->cur_rate > fp->rate_max)
continue;
if (! (fp->rates & SNDRV_PCM_RATE_CONTINUOUS)) {
unsigned int i;
for (i = 0; i < fp->nr_rates; i++)
- if (fp->rate_table[i] == rate)
+ if (fp->rate_table[i] == subs->cur_rate)
break;
if (i >= fp->nr_rates)
continue;
return 0;
}
+/*
+ * configure endpoint params
+ *
+ * called during initial setup and upon resume
+ */
+static int configure_endpoint(struct snd_usb_substream *subs)
+{
+ int ret;
+
+ /* format changed */
+ stop_endpoints(subs, 0, 0, 0);
+ ret = snd_usb_endpoint_set_params(subs->data_endpoint,
+ subs->pcm_format,
+ subs->channels,
+ subs->period_bytes,
+ subs->cur_rate,
+ subs->cur_audiofmt,
+ subs->sync_endpoint);
+ if (ret < 0)
+ return ret;
+
+ if (subs->sync_endpoint)
+ ret = snd_usb_endpoint_set_params(subs->data_endpoint,
+ subs->pcm_format,
+ subs->channels,
+ subs->period_bytes,
+ subs->cur_rate,
+ subs->cur_audiofmt,
+ NULL);
+ return ret;
+}
+
/*
* hw_params callback
*
{
struct snd_usb_substream *subs = substream->runtime->private_data;
struct audioformat *fmt;
- unsigned int channels, rate, format;
- int ret, changed;
+ int ret;
ret = snd_pcm_lib_alloc_vmalloc_buffer(substream,
params_buffer_bytes(hw_params));
if (ret < 0)
return ret;
- format = params_format(hw_params);
- rate = params_rate(hw_params);
- channels = params_channels(hw_params);
- fmt = find_format(subs, format, rate, channels);
+ subs->pcm_format = params_format(hw_params);
+ subs->period_bytes = params_period_bytes(hw_params);
+ subs->channels = params_channels(hw_params);
+ subs->cur_rate = params_rate(hw_params);
+
+ fmt = find_format(subs);
if (!fmt) {
snd_printd(KERN_DEBUG "cannot set format: format = %#x, rate = %d, channels = %d\n",
- format, rate, channels);
+ subs->pcm_format, subs->cur_rate, subs->channels);
return -EINVAL;
}
- changed = subs->cur_audiofmt != fmt ||
- subs->period_bytes != params_period_bytes(hw_params) ||
- subs->cur_rate != rate;
- if ((ret = set_format(subs, fmt)) < 0)
+ down_read(&subs->stream->chip->shutdown_rwsem);
+ if (subs->stream->chip->shutdown)
+ ret = -ENODEV;
+ else
+ ret = set_format(subs, fmt);
+ up_read(&subs->stream->chip->shutdown_rwsem);
+ if (ret < 0)
return ret;
- if (subs->cur_rate != rate) {
- struct usb_host_interface *alts;
- struct usb_interface *iface;
- iface = usb_ifnum_to_if(subs->dev, fmt->iface);
- alts = &iface->altsetting[fmt->altset_idx];
- ret = snd_usb_init_sample_rate(subs->stream->chip, fmt->iface, alts, fmt, rate);
- if (ret < 0)
- return ret;
- subs->cur_rate = rate;
- }
+ subs->interface = fmt->iface;
+ subs->altset_idx = fmt->altset_idx;
+ subs->need_setup_ep = true;
- if (changed) {
- mutex_lock(&subs->stream->chip->shutdown_mutex);
- /* format changed */
- stop_endpoints(subs, 0, 0, 0);
- 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);
- }
-
- if (ret == 0) {
- subs->interface = fmt->iface;
- subs->altset_idx = fmt->altset_idx;
- }
-
- return ret;
+ return 0;
}
/*
subs->cur_audiofmt = NULL;
subs->cur_rate = 0;
subs->period_bytes = 0;
- mutex_lock(&subs->stream->chip->shutdown_mutex);
- stop_endpoints(subs, 0, 1, 1);
- deactivate_endpoints(subs);
- mutex_unlock(&subs->stream->chip->shutdown_mutex);
+ down_read(&subs->stream->chip->shutdown_rwsem);
+ if (!subs->stream->chip->shutdown) {
+ stop_endpoints(subs, 0, 1, 1);
+ deactivate_endpoints(subs);
+ }
+ up_read(&subs->stream->chip->shutdown_rwsem);
return snd_pcm_lib_free_vmalloc_buffer(substream);
}
{
struct snd_pcm_runtime *runtime = substream->runtime;
struct snd_usb_substream *subs = runtime->private_data;
+ struct usb_host_interface *alts;
+ struct usb_interface *iface;
+ int ret;
if (! subs->cur_audiofmt) {
snd_printk(KERN_ERR "usbaudio: no format is specified!\n");
return -ENXIO;
}
- if (snd_BUG_ON(!subs->data_endpoint))
- return -EIO;
+ down_read(&subs->stream->chip->shutdown_rwsem);
+ if (subs->stream->chip->shutdown) {
+ ret = -ENODEV;
+ goto unlock;
+ }
+ if (snd_BUG_ON(!subs->data_endpoint)) {
+ ret = -EIO;
+ goto unlock;
+ }
+
+ ret = set_format(subs, subs->cur_audiofmt);
+ if (ret < 0)
+ goto unlock;
+
+ iface = usb_ifnum_to_if(subs->dev, subs->cur_audiofmt->iface);
+ alts = &iface->altsetting[subs->cur_audiofmt->altset_idx];
+ ret = snd_usb_init_sample_rate(subs->stream->chip,
+ subs->cur_audiofmt->iface,
+ alts,
+ subs->cur_audiofmt,
+ subs->cur_rate);
+ if (ret < 0)
+ goto unlock;
+
+ if (subs->need_setup_ep) {
+ ret = configure_endpoint(subs);
+ if (ret < 0)
+ goto unlock;
+ subs->need_setup_ep = false;
+ }
/* some unit conversions in runtime */
subs->data_endpoint->maxframesize =
/* 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, 1);
+ ret = start_endpoints(subs, 1);
- return 0;
+ unlock:
+ up_read(&subs->stream->chip->shutdown_rwsem);
+ return ret;
}
static struct snd_pcm_hardware snd_usb_hardware =
return 0;
}
/* check whether the period time is >= the data packet interval */
- if (snd_usb_get_speed(subs->dev) != USB_SPEED_FULL) {
+ if (subs->speed != USB_SPEED_FULL) {
ptime = 125 * (1 << fp->datainterval);
if (ptime > pt->max || (ptime == pt->max && pt->openmax)) {
hwc_debug(" > check: ptime %u > max %u\n", ptime, pt->max);
return err;
param_period_time_if_needed = SNDRV_PCM_HW_PARAM_PERIOD_TIME;
- if (snd_usb_get_speed(subs->dev) == USB_SPEED_FULL)
+ if (subs->speed == USB_SPEED_FULL)
/* full speed devices have fixed data packet interval */
ptmin = 1000;
if (ptmin == 1000)
git.openpandora.org / pandora-kernel.git / blobdiff