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sound/usb/pcm.c
42.6 KB
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/* * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ #include <linux/init.h> |
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#include <linux/slab.h> |
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#include <linux/bitrev.h> |
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#include <linux/ratelimit.h> |
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#include <linux/usb.h> #include <linux/usb/audio.h> |
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#include <linux/usb/audio-v2.h> |
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#include <sound/core.h> #include <sound/pcm.h> #include <sound/pcm_params.h> #include "usbaudio.h" #include "card.h" #include "quirks.h" #include "debug.h" |
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#include "endpoint.h" |
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#include "helper.h" #include "pcm.h" |
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#include "clock.h" |
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#include "power.h" |
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|
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#define SUBSTREAM_FLAG_DATA_EP_STARTED 0 #define SUBSTREAM_FLAG_SYNC_EP_STARTED 1 |
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/* 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) { int current_frame_number; int frame_diff; int est_delay; |
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if (!subs->last_delay) return 0; /* short path */ |
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current_frame_number = usb_get_current_frame_number(subs->dev); /* * HCD implementations use different widths, use lower 8 bits. * The delay will be managed up to 256ms, which is more than * enough */ frame_diff = (current_frame_number - subs->last_frame_number) & 0xff; /* Approximation based on number of samples per USB frame (ms), some truncation for 44.1 but the estimate is good enough */ |
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est_delay = frame_diff * rate / 1000; if (subs->direction == SNDRV_PCM_STREAM_PLAYBACK) est_delay = subs->last_delay - est_delay; else est_delay = subs->last_delay + est_delay; |
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if (est_delay < 0) est_delay = 0; return est_delay; } |
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/* * return the current pcm pointer. just based on the hwptr_done value. */ static snd_pcm_uframes_t snd_usb_pcm_pointer(struct snd_pcm_substream *substream) { struct snd_usb_substream *subs; unsigned int hwptr_done; subs = (struct snd_usb_substream *)substream->runtime->private_data; |
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if (subs->stream->chip->shutdown) return SNDRV_PCM_POS_XRUN; |
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spin_lock(&subs->lock); hwptr_done = subs->hwptr_done; |
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substream->runtime->delay = snd_usb_pcm_delay(subs, |
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substream->runtime->rate); |
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spin_unlock(&subs->lock); return hwptr_done / (substream->runtime->frame_bits >> 3); } /* * find a matching audio format */ |
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static struct audioformat *find_format(struct snd_usb_substream *subs) |
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{ |
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struct audioformat *fp; |
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struct audioformat *found = NULL; int cur_attr = 0, attr; |
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list_for_each_entry(fp, &subs->fmt_list, list) { |
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if (!(fp->formats & pcm_format_to_bits(subs->pcm_format))) |
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continue; |
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if (fp->channels != subs->channels) |
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continue; |
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if (subs->cur_rate < fp->rate_min || subs->cur_rate > fp->rate_max) |
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continue; if (! (fp->rates & SNDRV_PCM_RATE_CONTINUOUS)) { unsigned int i; for (i = 0; i < fp->nr_rates; i++) |
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if (fp->rate_table[i] == subs->cur_rate) |
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break; if (i >= fp->nr_rates) continue; } attr = fp->ep_attr & USB_ENDPOINT_SYNCTYPE; if (! found) { found = fp; cur_attr = attr; continue; } /* avoid async out and adaptive in if the other method * supports the same format. * this is a workaround for the case like * M-audio audiophile USB. */ if (attr != cur_attr) { if ((attr == USB_ENDPOINT_SYNC_ASYNC && subs->direction == SNDRV_PCM_STREAM_PLAYBACK) || (attr == USB_ENDPOINT_SYNC_ADAPTIVE && subs->direction == SNDRV_PCM_STREAM_CAPTURE)) continue; if ((cur_attr == USB_ENDPOINT_SYNC_ASYNC && subs->direction == SNDRV_PCM_STREAM_PLAYBACK) || (cur_attr == USB_ENDPOINT_SYNC_ADAPTIVE && subs->direction == SNDRV_PCM_STREAM_CAPTURE)) { found = fp; cur_attr = attr; continue; } } /* find the format with the largest max. packet size */ if (fp->maxpacksize > found->maxpacksize) { found = fp; cur_attr = attr; } } return found; } |
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static int init_pitch_v1(struct snd_usb_audio *chip, int iface, struct usb_host_interface *alts, struct audioformat *fmt) { struct usb_device *dev = chip->dev; unsigned int ep; unsigned char data[1]; int err; ep = get_endpoint(alts, 0)->bEndpointAddress; |
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data[0] = 1; if ((err = snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), UAC_SET_CUR, USB_TYPE_CLASS|USB_RECIP_ENDPOINT|USB_DIR_OUT, UAC_EP_CS_ATTR_PITCH_CONTROL << 8, ep, |
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data, sizeof(data))) < 0) { |
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snd_printk(KERN_ERR "%d:%d:%d: cannot set enable PITCH ", dev->devnum, iface, ep); return err; } return 0; } |
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|
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static int init_pitch_v2(struct snd_usb_audio *chip, int iface, struct usb_host_interface *alts, struct audioformat *fmt) { struct usb_device *dev = chip->dev; unsigned char data[1]; |
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int err; |
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data[0] = 1; if ((err = snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), UAC2_CS_CUR, USB_TYPE_CLASS | USB_RECIP_ENDPOINT | USB_DIR_OUT, UAC2_EP_CS_PITCH << 8, 0, |
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data, sizeof(data))) < 0) { |
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snd_printk(KERN_ERR "%d:%d:%d: cannot set enable PITCH (v2) ", dev->devnum, iface, fmt->altsetting); return err; } return 0; } |
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/* |
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* initialize the pitch control and sample rate |
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*/ |
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int snd_usb_init_pitch(struct snd_usb_audio *chip, int iface, |
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struct usb_host_interface *alts, struct audioformat *fmt) { |
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struct usb_interface_descriptor *altsd = get_iface_desc(alts); |
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/* if endpoint doesn't have pitch control, bail out */ if (!(fmt->attributes & UAC_EP_CS_ATTR_PITCH_CONTROL)) return 0; |
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switch (altsd->bInterfaceProtocol) { case UAC_VERSION_1: |
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default: |
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return init_pitch_v1(chip, iface, alts, fmt); case UAC_VERSION_2: |
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return init_pitch_v2(chip, iface, alts, fmt); |
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} |
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} |
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static int start_endpoints(struct snd_usb_substream *subs, bool can_sleep) |
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{ 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 ", ep); ep->data_subs = subs; |
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err = snd_usb_endpoint_start(ep, can_sleep); |
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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; |
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if (subs->data_endpoint->iface != subs->sync_endpoint->iface || subs->data_endpoint->alt_idx != subs->sync_endpoint->alt_idx) { err = usb_set_interface(subs->dev, subs->sync_endpoint->iface, subs->sync_endpoint->alt_idx); if (err < 0) { snd_printk(KERN_ERR "%d:%d:%d: cannot set interface (%d) ", subs->dev->devnum, subs->sync_endpoint->iface, subs->sync_endpoint->alt_idx, err); return -EIO; } } |
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snd_printdd(KERN_DEBUG "Starting sync EP @%p ", ep); ep->sync_slave = subs->data_endpoint; |
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err = snd_usb_endpoint_start(ep, can_sleep); |
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if (err < 0) { clear_bit(SUBSTREAM_FLAG_SYNC_EP_STARTED, &subs->flags); return err; } } return 0; } |
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static void stop_endpoints(struct snd_usb_substream *subs, bool wait) |
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{ if (test_and_clear_bit(SUBSTREAM_FLAG_SYNC_EP_STARTED, &subs->flags)) |
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snd_usb_endpoint_stop(subs->sync_endpoint); |
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if (test_and_clear_bit(SUBSTREAM_FLAG_DATA_EP_STARTED, &subs->flags)) |
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snd_usb_endpoint_stop(subs->data_endpoint); if (wait) { snd_usb_endpoint_sync_pending_stop(subs->sync_endpoint); snd_usb_endpoint_sync_pending_stop(subs->data_endpoint); } |
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} |
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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; } |
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/* * find a matching format and set up the interface */ static int set_format(struct snd_usb_substream *subs, struct audioformat *fmt) { struct usb_device *dev = subs->dev; struct usb_host_interface *alts; struct usb_interface_descriptor *altsd; struct usb_interface *iface; unsigned int ep, attr; int is_playback = subs->direction == SNDRV_PCM_STREAM_PLAYBACK; |
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int err, implicit_fb = 0; |
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iface = usb_ifnum_to_if(dev, fmt->iface); if (WARN_ON(!iface)) return -EINVAL; alts = &iface->altsetting[fmt->altset_idx]; altsd = get_iface_desc(alts); if (WARN_ON(altsd->bAlternateSetting != fmt->altsetting)) return -EINVAL; if (fmt == subs->cur_audiofmt) return 0; |
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/* close the old interface */ if (subs->interface >= 0 && subs->interface != fmt->iface) { err = usb_set_interface(subs->dev, subs->interface, 0); if (err < 0) { snd_printk(KERN_ERR "%d:%d:%d: return to setting 0 failed (%d) ", dev->devnum, fmt->iface, fmt->altsetting, err); return -EIO; } subs->interface = -1; subs->altset_idx = 0; } /* set interface */ if (subs->interface != fmt->iface || subs->altset_idx != fmt->altset_idx) { err = usb_set_interface(dev, fmt->iface, fmt->altsetting); if (err < 0) { snd_printk(KERN_ERR "%d:%d:%d: usb_set_interface failed (%d) ", dev->devnum, fmt->iface, fmt->altsetting, err); return -EIO; } snd_printdd(KERN_INFO "setting usb interface %d:%d ", fmt->iface, fmt->altsetting); subs->interface = fmt->iface; subs->altset_idx = fmt->altset_idx; |
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|
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snd_usb_set_interface_quirk(dev); |
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} |
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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; |
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/* we need a sync pipe in async OUT or adaptive IN mode */ /* check the number of EP, since some devices have broken * descriptors which fool us. if it has only one EP, * assume it as adaptive-out or sync-in. */ attr = fmt->ep_attr & USB_ENDPOINT_SYNCTYPE; |
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switch (subs->stream->chip->usb_id) { |
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case USB_ID(0x0763, 0x2030): /* M-Audio Fast Track C400 */ |
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case USB_ID(0x0763, 0x2031): /* M-Audio Fast Track C600 */ |
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if (is_playback) { implicit_fb = 1; ep = 0x81; iface = usb_ifnum_to_if(dev, 3); if (!iface || iface->num_altsetting == 0) return -EINVAL; alts = &iface->altsetting[1]; goto add_sync_ep; } break; |
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case USB_ID(0x0763, 0x2080): /* M-Audio FastTrack Ultra */ case USB_ID(0x0763, 0x2081): if (is_playback) { implicit_fb = 1; |
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ep = 0x81; iface = usb_ifnum_to_if(dev, 2); |
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if (!iface || iface->num_altsetting == 0) return -EINVAL; |
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alts = &iface->altsetting[1]; goto add_sync_ep; } |
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} |
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|
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if (((is_playback && attr == USB_ENDPOINT_SYNC_ASYNC) || (!is_playback && attr == USB_ENDPOINT_SYNC_ADAPTIVE)) && altsd->bNumEndpoints >= 2) { |
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/* check sync-pipe endpoint */ /* ... and check descriptor size before accessing bSynchAddress because there is a version of the SB Audigy 2 NX firmware lacking the audio fields in the endpoint descriptors */ |
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if ((get_endpoint(alts, 1)->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) != USB_ENDPOINT_XFER_ISOC || |
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(get_endpoint(alts, 1)->bLength >= USB_DT_ENDPOINT_AUDIO_SIZE && |
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get_endpoint(alts, 1)->bSynchAddress != 0 && !implicit_fb)) { |
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snd_printk(KERN_ERR "%d:%d:%d : invalid sync pipe. bmAttributes %02x, bLength %d, bSynchAddress %02x ", dev->devnum, fmt->iface, fmt->altsetting, get_endpoint(alts, 1)->bmAttributes, get_endpoint(alts, 1)->bLength, get_endpoint(alts, 1)->bSynchAddress); |
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return -EINVAL; } ep = get_endpoint(alts, 1)->bEndpointAddress; |
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if (!implicit_fb && get_endpoint(alts, 0)->bLength >= USB_DT_ENDPOINT_AUDIO_SIZE && |
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(( is_playback && ep != (unsigned int)(get_endpoint(alts, 0)->bSynchAddress | USB_DIR_IN)) || |
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(!is_playback && ep != (unsigned int)(get_endpoint(alts, 0)->bSynchAddress & ~USB_DIR_IN)))) { snd_printk(KERN_ERR "%d:%d:%d : invalid sync pipe. is_playback %d, ep %02x, bSynchAddress %02x ", dev->devnum, fmt->iface, fmt->altsetting, is_playback, ep, get_endpoint(alts, 0)->bSynchAddress); |
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return -EINVAL; } |
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implicit_fb = (get_endpoint(alts, 1)->bmAttributes & USB_ENDPOINT_USAGE_MASK) == USB_ENDPOINT_USAGE_IMPLICIT_FB; |
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add_sync_ep: subs->sync_endpoint = snd_usb_add_endpoint(subs->stream->chip, alts, ep, !subs->direction, |
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implicit_fb ? SND_USB_ENDPOINT_TYPE_DATA : SND_USB_ENDPOINT_TYPE_SYNC); |
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if (!subs->sync_endpoint) return -EINVAL; subs->data_endpoint->sync_master = subs->sync_endpoint; } |
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|
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if ((err = snd_usb_init_pitch(subs->stream->chip, fmt->iface, alts, fmt)) < 0) |
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return err; subs->cur_audiofmt = fmt; snd_usb_set_format_quirk(subs, fmt); #if 0 printk(KERN_DEBUG "setting done: format = %d, rate = %d..%d, channels = %d ", fmt->format, fmt->rate_min, fmt->rate_max, fmt->channels); printk(KERN_DEBUG " datapipe = 0x%0x, syncpipe = 0x%0x ", subs->datapipe, subs->syncpipe); #endif return 0; } /* |
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* Return the score of matching two audioformats. * Veto the audioformat if: * - It has no channels for some reason. * - Requested PCM format is not supported. * - Requested sample rate is not supported. */ static int match_endpoint_audioformats(struct audioformat *fp, struct audioformat *match, int rate, snd_pcm_format_t pcm_format) { int i; int score = 0; if (fp->channels < 1) { snd_printdd("%s: (fmt @%p) no channels ", __func__, fp); return 0; } |
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if (!(fp->formats & pcm_format_to_bits(pcm_format))) { |
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snd_printdd("%s: (fmt @%p) no match for format %d ", __func__, fp, pcm_format); return 0; } for (i = 0; i < fp->nr_rates; i++) { if (fp->rate_table[i] == rate) { score++; break; } } if (!score) { snd_printdd("%s: (fmt @%p) no match for rate %d ", __func__, fp, rate); return 0; } if (fp->channels == match->channels) score++; snd_printdd("%s: (fmt @%p) score %d ", __func__, fp, score); return score; } /* * Configure the sync ep using the rate and pcm format of the data ep. */ static int configure_sync_endpoint(struct snd_usb_substream *subs) { int ret; struct audioformat *fp; struct audioformat *sync_fp = NULL; int cur_score = 0; int sync_period_bytes = subs->period_bytes; struct snd_usb_substream *sync_subs = &subs->stream->substream[subs->direction ^ 1]; |
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if (subs->sync_endpoint->type != SND_USB_ENDPOINT_TYPE_DATA || !subs->stream) return snd_usb_endpoint_set_params(subs->sync_endpoint, subs->pcm_format, subs->channels, subs->period_bytes, subs->cur_rate, subs->cur_audiofmt, NULL); |
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/* Try to find the best matching audioformat. */ list_for_each_entry(fp, &sync_subs->fmt_list, list) { int score = match_endpoint_audioformats(fp, subs->cur_audiofmt, subs->cur_rate, subs->pcm_format); if (score > cur_score) { sync_fp = fp; cur_score = score; } } if (unlikely(sync_fp == NULL)) { snd_printk(KERN_ERR "%s: no valid audioformat for sync ep %x found ", __func__, sync_subs->ep_num); return -EINVAL; } /* * Recalculate the period bytes if channel number differ between * data and sync ep audioformat. */ if (sync_fp->channels != subs->channels) { sync_period_bytes = (subs->period_bytes / subs->channels) * sync_fp->channels; snd_printdd("%s: adjusted sync ep period bytes (%d -> %d) ", __func__, subs->period_bytes, sync_period_bytes); } ret = snd_usb_endpoint_set_params(subs->sync_endpoint, subs->pcm_format, sync_fp->channels, sync_period_bytes, subs->cur_rate, sync_fp, NULL); return ret; } /* |
61a709504 ALSA: usb-audio: ... |
563 564 565 566 567 568 569 |
* configure endpoint params * * called during initial setup and upon resume */ static int configure_endpoint(struct snd_usb_substream *subs) { int ret; |
61a709504 ALSA: usb-audio: ... |
570 |
/* format changed */ |
b0db6063d ALSA: usb-audio: ... |
571 |
stop_endpoints(subs, true); |
61a709504 ALSA: usb-audio: ... |
572 573 574 575 576 577 578 579 |
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) |
978520b75 ALSA: usb-audio: ... |
580 |
return ret; |
61a709504 ALSA: usb-audio: ... |
581 582 |
if (subs->sync_endpoint) |
0d9741c0e ALSA: usb-audio: ... |
583 |
ret = configure_sync_endpoint(subs); |
61a709504 ALSA: usb-audio: ... |
584 585 586 587 |
return ret; } /* |
e5779998b ALSA: usb-audio: ... |
588 589 590 591 592 593 594 595 596 597 598 599 600 601 |
* hw_params callback * * allocate a buffer and set the given audio format. * * so far we use a physically linear buffer although packetize transfer * doesn't need a continuous area. * if sg buffer is supported on the later version of alsa, we'll follow * that. */ static int snd_usb_hw_params(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *hw_params) { struct snd_usb_substream *subs = substream->runtime->private_data; struct audioformat *fmt; |
61a709504 ALSA: usb-audio: ... |
602 |
int ret; |
e5779998b ALSA: usb-audio: ... |
603 604 605 606 607 |
ret = snd_pcm_lib_alloc_vmalloc_buffer(substream, params_buffer_bytes(hw_params)); if (ret < 0) return ret; |
61a709504 ALSA: usb-audio: ... |
608 609 610 611 612 613 |
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); |
e5779998b ALSA: usb-audio: ... |
614 615 616 |
if (!fmt) { snd_printd(KERN_DEBUG "cannot set format: format = %#x, rate = %d, channels = %d ", |
61a709504 ALSA: usb-audio: ... |
617 |
subs->pcm_format, subs->cur_rate, subs->channels); |
e5779998b ALSA: usb-audio: ... |
618 619 |
return -EINVAL; } |
34f3c89fd ALSA: usb-audio: ... |
620 |
down_read(&subs->stream->chip->shutdown_rwsem); |
978520b75 ALSA: usb-audio: ... |
621 622 623 624 |
if (subs->stream->chip->shutdown) ret = -ENODEV; else ret = set_format(subs, fmt); |
34f3c89fd ALSA: usb-audio: ... |
625 |
up_read(&subs->stream->chip->shutdown_rwsem); |
978520b75 ALSA: usb-audio: ... |
626 |
if (ret < 0) |
e5779998b ALSA: usb-audio: ... |
627 |
return ret; |
61a709504 ALSA: usb-audio: ... |
628 629 |
subs->interface = fmt->iface; subs->altset_idx = fmt->altset_idx; |
384dc085c ALSA: usb-audio: ... |
630 |
subs->need_setup_ep = true; |
715a17056 ALSA: usb-audio: ... |
631 |
|
61a709504 ALSA: usb-audio: ... |
632 |
return 0; |
e5779998b ALSA: usb-audio: ... |
633 634 635 636 637 638 639 640 641 642 643 644 645 646 |
} /* * hw_free callback * * reset the audio format and release the buffer */ static int snd_usb_hw_free(struct snd_pcm_substream *substream) { struct snd_usb_substream *subs = substream->runtime->private_data; subs->cur_audiofmt = NULL; subs->cur_rate = 0; subs->period_bytes = 0; |
34f3c89fd ALSA: usb-audio: ... |
647 |
down_read(&subs->stream->chip->shutdown_rwsem); |
978520b75 ALSA: usb-audio: ... |
648 |
if (!subs->stream->chip->shutdown) { |
a9bb36261 ALSA: usb-audio: ... |
649 |
stop_endpoints(subs, true); |
978520b75 ALSA: usb-audio: ... |
650 651 |
deactivate_endpoints(subs); } |
34f3c89fd ALSA: usb-audio: ... |
652 |
up_read(&subs->stream->chip->shutdown_rwsem); |
e5779998b ALSA: usb-audio: ... |
653 654 655 656 657 658 659 660 661 662 663 664 |
return snd_pcm_lib_free_vmalloc_buffer(substream); } /* * prepare callback * * only a few subtle things... */ static int snd_usb_pcm_prepare(struct snd_pcm_substream *substream) { struct snd_pcm_runtime *runtime = substream->runtime; struct snd_usb_substream *subs = runtime->private_data; |
61a709504 ALSA: usb-audio: ... |
665 666 667 |
struct usb_host_interface *alts; struct usb_interface *iface; int ret; |
e5779998b ALSA: usb-audio: ... |
668 669 670 671 672 673 |
if (! subs->cur_audiofmt) { snd_printk(KERN_ERR "usbaudio: no format is specified! "); return -ENXIO; } |
34f3c89fd ALSA: usb-audio: ... |
674 |
down_read(&subs->stream->chip->shutdown_rwsem); |
978520b75 ALSA: usb-audio: ... |
675 676 677 678 679 680 681 682 |
if (subs->stream->chip->shutdown) { ret = -ENODEV; goto unlock; } if (snd_BUG_ON(!subs->data_endpoint)) { ret = -EIO; goto unlock; } |
edcd3633e ALSA: snd-usb: sw... |
683 |
|
f58161ba1 ALSA: usb-audio: ... |
684 685 |
snd_usb_endpoint_sync_pending_stop(subs->sync_endpoint); snd_usb_endpoint_sync_pending_stop(subs->data_endpoint); |
61a709504 ALSA: usb-audio: ... |
686 687 |
ret = set_format(subs, subs->cur_audiofmt); if (ret < 0) |
978520b75 ALSA: usb-audio: ... |
688 |
goto unlock; |
61a709504 ALSA: usb-audio: ... |
689 690 691 692 693 694 695 696 697 |
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) |
978520b75 ALSA: usb-audio: ... |
698 |
goto unlock; |
61a709504 ALSA: usb-audio: ... |
699 |
|
384dc085c ALSA: usb-audio: ... |
700 701 702 |
if (subs->need_setup_ep) { ret = configure_endpoint(subs); if (ret < 0) |
978520b75 ALSA: usb-audio: ... |
703 |
goto unlock; |
384dc085c ALSA: usb-audio: ... |
704 705 |
subs->need_setup_ep = false; } |
61a709504 ALSA: usb-audio: ... |
706 |
|
e5779998b ALSA: usb-audio: ... |
707 |
/* some unit conversions in runtime */ |
edcd3633e ALSA: snd-usb: sw... |
708 709 710 711 |
subs->data_endpoint->maxframesize = bytes_to_frames(runtime, subs->data_endpoint->maxpacksize); subs->data_endpoint->curframesize = bytes_to_frames(runtime, subs->data_endpoint->curpacksize); |
e5779998b ALSA: usb-audio: ... |
712 713 714 715 |
/* reset the pointer */ subs->hwptr_done = 0; subs->transfer_done = 0; |
294c4fb8a ALSA: usb: refine... |
716 717 |
subs->last_delay = 0; subs->last_frame_number = 0; |
e5779998b ALSA: usb-audio: ... |
718 |
runtime->delay = 0; |
edcd3633e ALSA: snd-usb: sw... |
719 720 721 |
/* 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) |
a9bb36261 ALSA: usb-audio: ... |
722 |
ret = start_endpoints(subs, true); |
edcd3633e ALSA: snd-usb: sw... |
723 |
|
978520b75 ALSA: usb-audio: ... |
724 |
unlock: |
34f3c89fd ALSA: usb-audio: ... |
725 |
up_read(&subs->stream->chip->shutdown_rwsem); |
978520b75 ALSA: usb-audio: ... |
726 |
return ret; |
e5779998b ALSA: usb-audio: ... |
727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 |
} static struct snd_pcm_hardware snd_usb_hardware = { .info = SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_MMAP_VALID | SNDRV_PCM_INFO_BATCH | SNDRV_PCM_INFO_INTERLEAVED | SNDRV_PCM_INFO_BLOCK_TRANSFER | SNDRV_PCM_INFO_PAUSE, .buffer_bytes_max = 1024 * 1024, .period_bytes_min = 64, .period_bytes_max = 512 * 1024, .periods_min = 2, .periods_max = 1024, }; static int hw_check_valid_format(struct snd_usb_substream *subs, struct snd_pcm_hw_params *params, struct audioformat *fp) { struct snd_interval *it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE); struct snd_interval *ct = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS); struct snd_mask *fmts = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT); struct snd_interval *pt = hw_param_interval(params, SNDRV_PCM_HW_PARAM_PERIOD_TIME); |
015eb0b08 ALSA: usb-audio: ... |
752 |
struct snd_mask check_fmts; |
e5779998b ALSA: usb-audio: ... |
753 754 755 |
unsigned int ptime; /* check the format */ |
015eb0b08 ALSA: usb-audio: ... |
756 757 758 759 760 |
snd_mask_none(&check_fmts); check_fmts.bits[0] = (u32)fp->formats; check_fmts.bits[1] = (u32)(fp->formats >> 32); snd_mask_intersect(&check_fmts, fmts); if (snd_mask_empty(&check_fmts)) { |
e5779998b ALSA: usb-audio: ... |
761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 |
hwc_debug(" > check: no supported format %d ", fp->format); return 0; } /* check the channels */ if (fp->channels < ct->min || fp->channels > ct->max) { hwc_debug(" > check: no valid channels %d (%d/%d) ", fp->channels, ct->min, ct->max); return 0; } /* check the rate is within the range */ if (fp->rate_min > it->max || (fp->rate_min == it->max && it->openmax)) { hwc_debug(" > check: rate_min %d > max %d ", fp->rate_min, it->max); return 0; } if (fp->rate_max < it->min || (fp->rate_max == it->min && it->openmin)) { hwc_debug(" > check: rate_max %d < min %d ", fp->rate_max, it->min); return 0; } /* check whether the period time is >= the data packet interval */ |
978520b75 ALSA: usb-audio: ... |
783 |
if (subs->speed != USB_SPEED_FULL) { |
e5779998b ALSA: usb-audio: ... |
784 785 786 787 788 789 790 791 792 793 794 795 796 797 |
ptime = 125 * (1 << fp->datainterval); if (ptime > pt->max || (ptime == pt->max && pt->openmax)) { hwc_debug(" > check: ptime %u > max %u ", ptime, pt->max); return 0; } } return 1; } static int hw_rule_rate(struct snd_pcm_hw_params *params, struct snd_pcm_hw_rule *rule) { struct snd_usb_substream *subs = rule->private; |
88766f04c ALSA: usb-audio: ... |
798 |
struct audioformat *fp; |
e5779998b ALSA: usb-audio: ... |
799 800 801 802 803 804 805 806 |
struct snd_interval *it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE); unsigned int rmin, rmax; int changed; hwc_debug("hw_rule_rate: (%d,%d) ", it->min, it->max); changed = 0; rmin = rmax = 0; |
88766f04c ALSA: usb-audio: ... |
807 |
list_for_each_entry(fp, &subs->fmt_list, list) { |
e5779998b ALSA: usb-audio: ... |
808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 |
if (!hw_check_valid_format(subs, params, fp)) continue; if (changed++) { if (rmin > fp->rate_min) rmin = fp->rate_min; if (rmax < fp->rate_max) rmax = fp->rate_max; } else { rmin = fp->rate_min; rmax = fp->rate_max; } } if (!changed) { hwc_debug(" --> get empty "); it->empty = 1; return -EINVAL; } changed = 0; if (it->min < rmin) { it->min = rmin; it->openmin = 0; changed = 1; } if (it->max > rmax) { it->max = rmax; it->openmax = 0; changed = 1; } if (snd_interval_checkempty(it)) { it->empty = 1; return -EINVAL; } hwc_debug(" --> (%d, %d) (changed = %d) ", it->min, it->max, changed); return changed; } static int hw_rule_channels(struct snd_pcm_hw_params *params, struct snd_pcm_hw_rule *rule) { struct snd_usb_substream *subs = rule->private; |
88766f04c ALSA: usb-audio: ... |
853 |
struct audioformat *fp; |
e5779998b ALSA: usb-audio: ... |
854 855 856 857 858 859 860 861 |
struct snd_interval *it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS); unsigned int rmin, rmax; int changed; hwc_debug("hw_rule_channels: (%d,%d) ", it->min, it->max); changed = 0; rmin = rmax = 0; |
88766f04c ALSA: usb-audio: ... |
862 |
list_for_each_entry(fp, &subs->fmt_list, list) { |
e5779998b ALSA: usb-audio: ... |
863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 |
if (!hw_check_valid_format(subs, params, fp)) continue; if (changed++) { if (rmin > fp->channels) rmin = fp->channels; if (rmax < fp->channels) rmax = fp->channels; } else { rmin = fp->channels; rmax = fp->channels; } } if (!changed) { hwc_debug(" --> get empty "); it->empty = 1; return -EINVAL; } changed = 0; if (it->min < rmin) { it->min = rmin; it->openmin = 0; changed = 1; } if (it->max > rmax) { it->max = rmax; it->openmax = 0; changed = 1; } if (snd_interval_checkempty(it)) { it->empty = 1; return -EINVAL; } hwc_debug(" --> (%d, %d) (changed = %d) ", it->min, it->max, changed); return changed; } static int hw_rule_format(struct snd_pcm_hw_params *params, struct snd_pcm_hw_rule *rule) { struct snd_usb_substream *subs = rule->private; |
88766f04c ALSA: usb-audio: ... |
907 |
struct audioformat *fp; |
e5779998b ALSA: usb-audio: ... |
908 909 910 911 912 913 914 915 |
struct snd_mask *fmt = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT); u64 fbits; u32 oldbits[2]; int changed; hwc_debug("hw_rule_format: %x:%x ", fmt->bits[0], fmt->bits[1]); fbits = 0; |
88766f04c ALSA: usb-audio: ... |
916 |
list_for_each_entry(fp, &subs->fmt_list, list) { |
e5779998b ALSA: usb-audio: ... |
917 918 |
if (!hw_check_valid_format(subs, params, fp)) continue; |
015eb0b08 ALSA: usb-audio: ... |
919 |
fbits |= fp->formats; |
e5779998b ALSA: usb-audio: ... |
920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 |
} oldbits[0] = fmt->bits[0]; oldbits[1] = fmt->bits[1]; fmt->bits[0] &= (u32)fbits; fmt->bits[1] &= (u32)(fbits >> 32); if (!fmt->bits[0] && !fmt->bits[1]) { hwc_debug(" --> get empty "); return -EINVAL; } changed = (oldbits[0] != fmt->bits[0] || oldbits[1] != fmt->bits[1]); hwc_debug(" --> %x:%x (changed = %d) ", fmt->bits[0], fmt->bits[1], changed); return changed; } static int hw_rule_period_time(struct snd_pcm_hw_params *params, struct snd_pcm_hw_rule *rule) { struct snd_usb_substream *subs = rule->private; struct audioformat *fp; struct snd_interval *it; unsigned char min_datainterval; unsigned int pmin; int changed; it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_PERIOD_TIME); hwc_debug("hw_rule_period_time: (%u,%u) ", it->min, it->max); min_datainterval = 0xff; list_for_each_entry(fp, &subs->fmt_list, list) { if (!hw_check_valid_format(subs, params, fp)) continue; min_datainterval = min(min_datainterval, fp->datainterval); } if (min_datainterval == 0xff) { |
a7ce2e0d0 fix comnment/prin... |
957 958 |
hwc_debug(" --> get empty "); |
e5779998b ALSA: usb-audio: ... |
959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 |
it->empty = 1; return -EINVAL; } pmin = 125 * (1 << min_datainterval); changed = 0; if (it->min < pmin) { it->min = pmin; it->openmin = 0; changed = 1; } if (snd_interval_checkempty(it)) { it->empty = 1; return -EINVAL; } hwc_debug(" --> (%u,%u) (changed = %d) ", it->min, it->max, changed); return changed; } /* * If the device supports unusual bit rates, does the request meet these? */ static int snd_usb_pcm_check_knot(struct snd_pcm_runtime *runtime, struct snd_usb_substream *subs) { struct audioformat *fp; |
0717d0f5d ALSA: usb-audio -... |
985 |
int *rate_list; |
e5779998b ALSA: usb-audio: ... |
986 987 |
int count = 0, needs_knot = 0; int err; |
5cd5d7c44 ALSA: usb-audio: ... |
988 989 |
kfree(subs->rate_list.list); subs->rate_list.list = NULL; |
e5779998b ALSA: usb-audio: ... |
990 991 992 993 994 995 996 997 998 |
list_for_each_entry(fp, &subs->fmt_list, list) { if (fp->rates & SNDRV_PCM_RATE_CONTINUOUS) return 0; count += fp->nr_rates; if (fp->rates & SNDRV_PCM_RATE_KNOT) needs_knot = 1; } if (!needs_knot) return 0; |
0717d0f5d ALSA: usb-audio -... |
999 1000 |
subs->rate_list.list = rate_list = kmalloc(sizeof(int) * count, GFP_KERNEL); |
8a8d56b2a ALSA: usb - drive... |
1001 1002 1003 |
if (!subs->rate_list.list) return -ENOMEM; subs->rate_list.count = count; |
e5779998b ALSA: usb-audio: ... |
1004 1005 1006 1007 1008 |
subs->rate_list.mask = 0; count = 0; list_for_each_entry(fp, &subs->fmt_list, list) { int i; for (i = 0; i < fp->nr_rates; i++) |
0717d0f5d ALSA: usb-audio -... |
1009 |
rate_list[count++] = fp->rate_table[i]; |
e5779998b ALSA: usb-audio: ... |
1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 |
} err = snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, &subs->rate_list); if (err < 0) return err; return 0; } /* * set up the runtime hardware information. */ static int setup_hw_info(struct snd_pcm_runtime *runtime, struct snd_usb_substream *subs) { |
88766f04c ALSA: usb-audio: ... |
1026 |
struct audioformat *fp; |
e5779998b ALSA: usb-audio: ... |
1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 |
unsigned int pt, ptmin; int param_period_time_if_needed; int err; runtime->hw.formats = subs->formats; runtime->hw.rate_min = 0x7fffffff; runtime->hw.rate_max = 0; runtime->hw.channels_min = 256; runtime->hw.channels_max = 0; runtime->hw.rates = 0; ptmin = UINT_MAX; /* check min/max rates and channels */ |
88766f04c ALSA: usb-audio: ... |
1040 |
list_for_each_entry(fp, &subs->fmt_list, list) { |
e5779998b ALSA: usb-audio: ... |
1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 |
runtime->hw.rates |= fp->rates; if (runtime->hw.rate_min > fp->rate_min) runtime->hw.rate_min = fp->rate_min; if (runtime->hw.rate_max < fp->rate_max) runtime->hw.rate_max = fp->rate_max; if (runtime->hw.channels_min > fp->channels) runtime->hw.channels_min = fp->channels; if (runtime->hw.channels_max < fp->channels) runtime->hw.channels_max = fp->channels; if (fp->fmt_type == UAC_FORMAT_TYPE_II && fp->frame_size > 0) { /* FIXME: there might be more than one audio formats... */ runtime->hw.period_bytes_min = runtime->hw.period_bytes_max = fp->frame_size; } pt = 125 * (1 << fp->datainterval); ptmin = min(ptmin, pt); } |
88a8516a2 ALSA: usbaudio: i... |
1058 1059 1060 |
err = snd_usb_autoresume(subs->stream->chip); if (err < 0) return err; |
e5779998b ALSA: usb-audio: ... |
1061 1062 |
param_period_time_if_needed = SNDRV_PCM_HW_PARAM_PERIOD_TIME; |
978520b75 ALSA: usb-audio: ... |
1063 |
if (subs->speed == USB_SPEED_FULL) |
e5779998b ALSA: usb-audio: ... |
1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 |
/* full speed devices have fixed data packet interval */ ptmin = 1000; if (ptmin == 1000) /* if period time doesn't go below 1 ms, no rules needed */ param_period_time_if_needed = -1; snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_TIME, ptmin, UINT_MAX); if ((err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, hw_rule_rate, subs, SNDRV_PCM_HW_PARAM_FORMAT, SNDRV_PCM_HW_PARAM_CHANNELS, param_period_time_if_needed, -1)) < 0) |
88a8516a2 ALSA: usbaudio: i... |
1078 |
goto rep_err; |
e5779998b ALSA: usb-audio: ... |
1079 1080 1081 1082 1083 1084 |
if ((err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS, hw_rule_channels, subs, SNDRV_PCM_HW_PARAM_FORMAT, SNDRV_PCM_HW_PARAM_RATE, param_period_time_if_needed, -1)) < 0) |
88a8516a2 ALSA: usbaudio: i... |
1085 |
goto rep_err; |
e5779998b ALSA: usb-audio: ... |
1086 1087 1088 1089 1090 1091 |
if ((err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT, hw_rule_format, subs, SNDRV_PCM_HW_PARAM_RATE, SNDRV_PCM_HW_PARAM_CHANNELS, param_period_time_if_needed, -1)) < 0) |
88a8516a2 ALSA: usbaudio: i... |
1092 |
goto rep_err; |
e5779998b ALSA: usb-audio: ... |
1093 1094 1095 1096 1097 1098 1099 1100 1101 |
if (param_period_time_if_needed >= 0) { err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_TIME, hw_rule_period_time, subs, SNDRV_PCM_HW_PARAM_FORMAT, SNDRV_PCM_HW_PARAM_CHANNELS, SNDRV_PCM_HW_PARAM_RATE, -1); if (err < 0) |
88a8516a2 ALSA: usbaudio: i... |
1102 |
goto rep_err; |
e5779998b ALSA: usb-audio: ... |
1103 1104 |
} if ((err = snd_usb_pcm_check_knot(runtime, subs)) < 0) |
88a8516a2 ALSA: usbaudio: i... |
1105 |
goto rep_err; |
e5779998b ALSA: usb-audio: ... |
1106 |
return 0; |
88a8516a2 ALSA: usbaudio: i... |
1107 1108 1109 1110 |
rep_err: snd_usb_autosuspend(subs->stream->chip); return err; |
e5779998b ALSA: usb-audio: ... |
1111 1112 1113 1114 1115 1116 1117 1118 1119 |
} static int snd_usb_pcm_open(struct snd_pcm_substream *substream, int direction) { struct snd_usb_stream *as = snd_pcm_substream_chip(substream); struct snd_pcm_runtime *runtime = substream->runtime; struct snd_usb_substream *subs = &as->substream[direction]; subs->interface = -1; |
e11b4e0e4 ALSA: usb-audio: ... |
1120 |
subs->altset_idx = 0; |
e5779998b ALSA: usb-audio: ... |
1121 1122 1123 |
runtime->hw = snd_usb_hardware; runtime->private_data = subs; subs->pcm_substream = substream; |
88a8516a2 ALSA: usbaudio: i... |
1124 |
/* runtime PM is also done there */ |
d24f5061e ALSA: snd-usb: ad... |
1125 1126 1127 1128 1129 |
/* initialize DSD/DOP context */ subs->dsd_dop.byte_idx = 0; subs->dsd_dop.channel = 0; subs->dsd_dop.marker = 1; |
e5779998b ALSA: usb-audio: ... |
1130 1131 1132 1133 1134 1135 1136 |
return setup_hw_info(runtime, subs); } static int snd_usb_pcm_close(struct snd_pcm_substream *substream, int direction) { struct snd_usb_stream *as = snd_pcm_substream_chip(substream); struct snd_usb_substream *subs = &as->substream[direction]; |
b0db6063d ALSA: usb-audio: ... |
1137 |
stop_endpoints(subs, true); |
68e67f40b ALSA: snd-usb: mo... |
1138 1139 1140 1141 1142 |
if (!as->chip->shutdown && subs->interface >= 0) { usb_set_interface(subs->dev, subs->interface, 0); subs->interface = -1; } |
e5779998b ALSA: usb-audio: ... |
1143 |
subs->pcm_substream = NULL; |
88a8516a2 ALSA: usbaudio: i... |
1144 |
snd_usb_autosuspend(subs->stream->chip); |
edcd3633e ALSA: snd-usb: sw... |
1145 |
|
68e67f40b ALSA: snd-usb: mo... |
1146 |
return 0; |
edcd3633e ALSA: snd-usb: sw... |
1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 |
} /* 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; |
e4cc61534 ALSA: usb-audio: ... |
1162 1163 1164 1165 |
int current_frame_number; /* read frame number here, update pointer in critical section */ current_frame_number = usb_get_current_frame_number(subs->dev); |
edcd3633e ALSA: snd-usb: sw... |
1166 1167 1168 1169 |
stride = runtime->frame_bits >> 3; for (i = 0; i < urb->number_of_packets; i++) { |
1539d4f82 ALSA: usb: Add qu... |
1170 |
cp = (unsigned char *)urb->transfer_buffer + urb->iso_frame_desc[i].offset + subs->pkt_offset_adj; |
edcd3633e ALSA: snd-usb: sw... |
1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 |
if (urb->iso_frame_desc[i].status && printk_ratelimit()) { snd_printdd(KERN_ERR "frame %d active: %d ", 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) { |
edcd3633e ALSA: snd-usb: sw... |
1181 |
int oldbytes = bytes; |
edcd3633e ALSA: snd-usb: sw... |
1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 |
bytes = frames * stride; snd_printdd(KERN_ERR "Corrected urb data len. %d->%d ", 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; } |
e4cc61534 ALSA: usb-audio: ... |
1199 1200 1201 1202 1203 1204 1205 1206 |
/* capture delay is by construction limited to one URB, * reset delays here */ runtime->delay = subs->last_delay = 0; /* realign last_frame_number */ subs->last_frame_number = current_frame_number; subs->last_frame_number &= 0xFF; /* keep 8 LSBs */ |
edcd3633e ALSA: snd-usb: sw... |
1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 |
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); } |
d24f5061e ALSA: snd-usb: ad... |
1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 |
static inline void fill_playback_urb_dsd_dop(struct snd_usb_substream *subs, struct urb *urb, unsigned int bytes) { struct snd_pcm_runtime *runtime = subs->pcm_substream->runtime; unsigned int stride = runtime->frame_bits >> 3; unsigned int dst_idx = 0; unsigned int src_idx = subs->hwptr_done; unsigned int wrap = runtime->buffer_size * stride; u8 *dst = urb->transfer_buffer; u8 *src = runtime->dma_area; u8 marker[] = { 0x05, 0xfa }; /* * The DSP DOP format defines a way to transport DSD samples over * normal PCM data endpoints. It requires stuffing of marker bytes * (0x05 and 0xfa, alternating per sample frame), and then expects * 2 additional bytes of actual payload. The whole frame is stored * LSB. * * Hence, for a stereo transport, the buffer layout looks like this, * where L refers to left channel samples and R to right. * * L1 L2 0x05 R1 R2 0x05 L3 L4 0xfa R3 R4 0xfa * L5 L6 0x05 R5 R6 0x05 L7 L8 0xfa R7 R8 0xfa * ..... * */ while (bytes--) { if (++subs->dsd_dop.byte_idx == 3) { /* frame boundary? */ dst[dst_idx++] = marker[subs->dsd_dop.marker]; src_idx += 2; subs->dsd_dop.byte_idx = 0; if (++subs->dsd_dop.channel % runtime->channels == 0) { /* alternate the marker */ subs->dsd_dop.marker++; subs->dsd_dop.marker %= ARRAY_SIZE(marker); subs->dsd_dop.channel = 0; } } else { /* stuff the DSD payload */ int idx = (src_idx + subs->dsd_dop.byte_idx - 1) % wrap; |
44dcbbb1c ALSA: snd-usb: ad... |
1266 1267 1268 1269 1270 |
if (subs->cur_audiofmt->dsd_bitrev) dst[dst_idx++] = bitrev8(src[idx]); else dst[dst_idx++] = src[idx]; |
d24f5061e ALSA: snd-usb: ad... |
1271 1272 1273 1274 |
subs->hwptr_done++; } } } |
edcd3633e ALSA: snd-usb: sw... |
1275 1276 1277 1278 |
static void prepare_playback_urb(struct snd_usb_substream *subs, struct urb *urb) { struct snd_pcm_runtime *runtime = subs->pcm_substream->runtime; |
245baf983 ALSA: snd-usb: fi... |
1279 |
struct snd_usb_endpoint *ep = subs->data_endpoint; |
edcd3633e ALSA: snd-usb: sw... |
1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 |
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++) { |
245baf983 ALSA: snd-usb: fi... |
1291 1292 1293 1294 |
if (ctx->packet_size[i]) counts = ctx->packet_size[i]; else counts = snd_usb_endpoint_next_packet_size(ep); |
edcd3633e ALSA: snd-usb: sw... |
1295 |
/* set up descriptor */ |
8a2a74d2b ALSA: snd-usb: us... |
1296 1297 |
urb->iso_frame_desc[i].offset = frames * ep->stride; urb->iso_frame_desc[i].length = counts * ep->stride; |
edcd3633e ALSA: snd-usb: sw... |
1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 |
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 = |
8a2a74d2b ALSA: snd-usb: us... |
1311 |
counts * ep->stride; |
edcd3633e ALSA: snd-usb: sw... |
1312 1313 1314 1315 1316 1317 |
subs->transfer_done = 0; } i++; if (i < ctx->packets) { /* add a transfer delimiter */ urb->iso_frame_desc[i].offset = |
8a2a74d2b ALSA: snd-usb: us... |
1318 |
frames * ep->stride; |
edcd3633e ALSA: snd-usb: sw... |
1319 1320 1321 1322 1323 1324 1325 |
urb->iso_frame_desc[i].length = 0; urb->number_of_packets++; } break; } } if (period_elapsed && |
98ae472b5 ALSA: usb-audio: ... |
1326 |
!snd_usb_endpoint_implicit_feedback_sink(subs->data_endpoint)) /* finish at the period boundary */ |
edcd3633e ALSA: snd-usb: sw... |
1327 1328 |
break; } |
8a2a74d2b ALSA: snd-usb: us... |
1329 |
bytes = frames * ep->stride; |
d24f5061e ALSA: snd-usb: ad... |
1330 1331 1332 1333 |
if (unlikely(subs->pcm_format == SNDRV_PCM_FORMAT_DSD_U16_LE && subs->cur_audiofmt->dsd_dop)) { fill_playback_urb_dsd_dop(subs, urb, bytes); |
44dcbbb1c ALSA: snd-usb: ad... |
1334 1335 1336 1337 1338 1339 1340 1341 1342 1343 1344 |
} else if (unlikely(subs->pcm_format == SNDRV_PCM_FORMAT_DSD_U8 && subs->cur_audiofmt->dsd_bitrev)) { /* bit-reverse the bytes */ u8 *buf = urb->transfer_buffer; for (i = 0; i < bytes; i++) { int idx = (subs->hwptr_done + i) % (runtime->buffer_size * stride); buf[i] = bitrev8(runtime->dma_area[idx]); } subs->hwptr_done += bytes; |
edcd3633e ALSA: snd-usb: sw... |
1345 |
} else { |
d24f5061e ALSA: snd-usb: ad... |
1346 1347 1348 1349 1350 1351 1352 1353 1354 1355 1356 1357 1358 1359 1360 |
/* usual PCM */ 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; |
edcd3633e ALSA: snd-usb: sw... |
1361 |
} |
d24f5061e ALSA: snd-usb: ad... |
1362 |
|
edcd3633e ALSA: snd-usb: sw... |
1363 1364 |
if (subs->hwptr_done >= runtime->buffer_size * stride) subs->hwptr_done -= runtime->buffer_size * stride; |
fbcfbf5f6 ALSA: snd-usb: re... |
1365 1366 1367 |
/* update delay with exact number of samples queued */ runtime->delay = subs->last_delay; |
edcd3633e ALSA: snd-usb: sw... |
1368 |
runtime->delay += frames; |
fbcfbf5f6 ALSA: snd-usb: re... |
1369 1370 1371 1372 1373 |
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 */ |
edcd3633e ALSA: snd-usb: sw... |
1374 1375 1376 1377 1378 1379 1380 1381 1382 1383 1384 1385 1386 1387 1388 |
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; |
8a2a74d2b ALSA: snd-usb: us... |
1389 1390 |
struct snd_usb_endpoint *ep = subs->data_endpoint; int processed = urb->transfer_buffer_length / ep->stride; |
fbcfbf5f6 ALSA: snd-usb: re... |
1391 |
int est_delay; |
edcd3633e ALSA: snd-usb: sw... |
1392 |
|
1213a205f ALSA: usb-audio: ... |
1393 1394 1395 1396 1397 |
/* ignore the delay accounting when procssed=0 is given, i.e. * silent payloads are procssed before handling the actual data */ if (!processed) return; |
edcd3633e ALSA: snd-usb: sw... |
1398 |
spin_lock_irqsave(&subs->lock, flags); |
48779a0b8 ALSA: usb-audio: ... |
1399 1400 |
if (!subs->last_delay) goto out; /* short path */ |
fbcfbf5f6 ALSA: snd-usb: re... |
1401 1402 1403 1404 |
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; |
edcd3633e ALSA: snd-usb: sw... |
1405 |
else |
fbcfbf5f6 ALSA: snd-usb: re... |
1406 1407 1408 1409 1410 1411 1412 1413 1414 1415 1416 1417 |
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 ", est_delay, subs->last_delay); |
48779a0b8 ALSA: usb-audio: ... |
1418 1419 1420 1421 1422 1423 1424 1425 1426 |
if (!subs->running) { /* update last_frame_number for delay counting here since * prepare_playback_urb won't be called during pause */ subs->last_frame_number = usb_get_current_frame_number(subs->dev) & 0xff; } out: |
edcd3633e ALSA: snd-usb: sw... |
1427 |
spin_unlock_irqrestore(&subs->lock, flags); |
e5779998b ALSA: usb-audio: ... |
1428 1429 1430 1431 1432 1433 1434 1435 1436 1437 1438 1439 1440 1441 1442 1443 1444 1445 1446 1447 1448 |
} static int snd_usb_playback_open(struct snd_pcm_substream *substream) { return snd_usb_pcm_open(substream, SNDRV_PCM_STREAM_PLAYBACK); } static int snd_usb_playback_close(struct snd_pcm_substream *substream) { return snd_usb_pcm_close(substream, SNDRV_PCM_STREAM_PLAYBACK); } static int snd_usb_capture_open(struct snd_pcm_substream *substream) { return snd_usb_pcm_open(substream, SNDRV_PCM_STREAM_CAPTURE); } static int snd_usb_capture_close(struct snd_pcm_substream *substream) { return snd_usb_pcm_close(substream, SNDRV_PCM_STREAM_CAPTURE); } |
edcd3633e ALSA: snd-usb: sw... |
1449 1450 1451 1452 1453 1454 1455 1456 1457 1458 |
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; |
97f8d3b65 ALSA: snd-usb: fi... |
1459 |
subs->running = 1; |
edcd3633e ALSA: snd-usb: sw... |
1460 1461 |
return 0; case SNDRV_PCM_TRIGGER_STOP: |
a9bb36261 ALSA: usb-audio: ... |
1462 |
stop_endpoints(subs, false); |
97f8d3b65 ALSA: snd-usb: fi... |
1463 |
subs->running = 0; |
edcd3633e ALSA: snd-usb: sw... |
1464 1465 1466 |
return 0; case SNDRV_PCM_TRIGGER_PAUSE_PUSH: subs->data_endpoint->prepare_data_urb = NULL; |
48779a0b8 ALSA: usb-audio: ... |
1467 1468 |
/* keep retire_data_urb for delay calculation */ subs->data_endpoint->retire_data_urb = retire_playback_urb; |
97f8d3b65 ALSA: snd-usb: fi... |
1469 |
subs->running = 0; |
edcd3633e ALSA: snd-usb: sw... |
1470 1471 1472 1473 1474 |
return 0; } return -EINVAL; } |
afe25967e ALSA: snd-usb: ma... |
1475 1476 |
static int snd_usb_substream_capture_trigger(struct snd_pcm_substream *substream, int cmd) |
edcd3633e ALSA: snd-usb: sw... |
1477 1478 1479 1480 1481 1482 |
{ int err; struct snd_usb_substream *subs = substream->runtime->private_data; switch (cmd) { case SNDRV_PCM_TRIGGER_START: |
a9bb36261 ALSA: usb-audio: ... |
1483 |
err = start_endpoints(subs, false); |
edcd3633e ALSA: snd-usb: sw... |
1484 1485 1486 1487 |
if (err < 0) return err; subs->data_endpoint->retire_data_urb = retire_capture_urb; |
97f8d3b65 ALSA: snd-usb: fi... |
1488 |
subs->running = 1; |
edcd3633e ALSA: snd-usb: sw... |
1489 1490 |
return 0; case SNDRV_PCM_TRIGGER_STOP: |
a9bb36261 ALSA: usb-audio: ... |
1491 |
stop_endpoints(subs, false); |
97f8d3b65 ALSA: snd-usb: fi... |
1492 |
subs->running = 0; |
edcd3633e ALSA: snd-usb: sw... |
1493 1494 1495 |
return 0; case SNDRV_PCM_TRIGGER_PAUSE_PUSH: subs->data_endpoint->retire_data_urb = NULL; |
97f8d3b65 ALSA: snd-usb: fi... |
1496 |
subs->running = 0; |
edcd3633e ALSA: snd-usb: sw... |
1497 1498 1499 |
return 0; case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: subs->data_endpoint->retire_data_urb = retire_capture_urb; |
97f8d3b65 ALSA: snd-usb: fi... |
1500 |
subs->running = 1; |
edcd3633e ALSA: snd-usb: sw... |
1501 1502 1503 1504 1505 |
return 0; } return -EINVAL; } |
e5779998b ALSA: usb-audio: ... |
1506 1507 1508 1509 1510 1511 1512 1513 1514 1515 1516 1517 1518 1519 1520 1521 1522 1523 1524 1525 1526 1527 1528 1529 1530 1531 1532 1533 1534 1535 1536 1537 |
static struct snd_pcm_ops snd_usb_playback_ops = { .open = snd_usb_playback_open, .close = snd_usb_playback_close, .ioctl = snd_pcm_lib_ioctl, .hw_params = snd_usb_hw_params, .hw_free = snd_usb_hw_free, .prepare = snd_usb_pcm_prepare, .trigger = snd_usb_substream_playback_trigger, .pointer = snd_usb_pcm_pointer, .page = snd_pcm_lib_get_vmalloc_page, .mmap = snd_pcm_lib_mmap_vmalloc, }; static struct snd_pcm_ops snd_usb_capture_ops = { .open = snd_usb_capture_open, .close = snd_usb_capture_close, .ioctl = snd_pcm_lib_ioctl, .hw_params = snd_usb_hw_params, .hw_free = snd_usb_hw_free, .prepare = snd_usb_pcm_prepare, .trigger = snd_usb_substream_capture_trigger, .pointer = snd_usb_pcm_pointer, .page = snd_pcm_lib_get_vmalloc_page, .mmap = snd_pcm_lib_mmap_vmalloc, }; void snd_usb_set_pcm_ops(struct snd_pcm *pcm, int stream) { snd_pcm_set_ops(pcm, stream, stream == SNDRV_PCM_STREAM_PLAYBACK ? &snd_usb_playback_ops : &snd_usb_capture_ops); } |