| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Daniel Mack | 5256 | 59.40% | 19 | 20.43% |
| Eldad Zack | 1108 | 12.52% | 14 | 15.05% |
| Takashi Iwai | 807 | 9.12% | 22 | 23.66% |
| Ricard Wanderlöf | 383 | 4.33% | 4 | 4.30% |
| Jorge Sanjuan | 278 | 3.14% | 2 | 2.15% |
| Pierre-Louis Bossart | 273 | 3.09% | 5 | 5.38% |
| Clemens Ladisch | 259 | 2.93% | 6 | 6.45% |
| Dylan Reid | 225 | 2.54% | 1 | 1.08% |
| Alberto Aguirre | 87 | 0.98% | 3 | 3.23% |
| Alan Stern | 60 | 0.68% | 1 | 1.08% |
| Jesper Juhl | 21 | 0.24% | 1 | 1.08% |
| Jurgen Kramer | 19 | 0.21% | 1 | 1.08% |
| Lassi Ylikojola | 17 | 0.19% | 1 | 1.08% |
| Manuel Reinhardt | 12 | 0.14% | 1 | 1.08% |
| Mauro Carvalho Chehab | 9 | 0.10% | 1 | 1.08% |
| Oliver Neukum | 8 | 0.09% | 1 | 1.08% |
| Daniel Girnus | 7 | 0.08% | 1 | 1.08% |
| Calvin Owens | 4 | 0.05% | 1 | 1.08% |
| Paul Zimmerman | 4 | 0.05% | 1 | 1.08% |
| Kees Cook | 3 | 0.03% | 1 | 1.08% |
| Stephen Rothwell | 3 | 0.03% | 1 | 1.08% |
| Arvind Yadav | 2 | 0.02% | 1 | 1.08% |
| Uwe Kleine-König | 1 | 0.01% | 1 | 1.08% |
| Bhumika Goyal | 1 | 0.01% | 1 | 1.08% |
| Gustavo A. R. Silva | 1 | 0.01% | 1 | 1.08% |
| Sander Eikelenboom | 1 | 0.01% | 1 | 1.08% |
| Total | 8849 | 93 |
/* * 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> #include <linux/slab.h> #include <linux/bitrev.h> #include <linux/ratelimit.h> #include <linux/usb.h> #include <linux/usb/audio.h> #include <linux/usb/audio-v2.h> #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" #include "endpoint.h" #include "helper.h" #include "pcm.h" #include "clock.h" #include "power.h" #define SUBSTREAM_FLAG_DATA_EP_STARTED 0 #define SUBSTREAM_FLAG_SYNC_EP_STARTED 1 /* return the estimated delay based on USB frame counters */ snd_pcm_uframes_t snd_usb_pcm_delay(struct snd_usb_substream *subs, unsigned int rate) { int current_frame_number; int frame_diff; int est_delay; if (!subs->last_delay) return 0; /* short path */ 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 */ 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; if (est_delay < 0) est_delay = 0; return est_delay; } /* * 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 = substream->runtime->private_data; unsigned int hwptr_done; if (atomic_read(&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, substream->runtime->rate); spin_unlock(&subs->lock); return hwptr_done / (substream->runtime->frame_bits >> 3); } /* * find a matching audio format */ static struct audioformat *find_format(struct snd_usb_substream *subs) { struct audioformat *fp; struct audioformat *found = NULL; int cur_attr = 0, attr; list_for_each_entry(fp, &subs->fmt_list, list) { if (!(fp->formats & pcm_format_to_bits(subs->pcm_format))) continue; if (fp->channels != subs->channels) continue; 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] == subs->cur_rate) 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; } 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; if (get_iface_desc(alts)->bNumEndpoints < 1) return -EINVAL; ep = get_endpoint(alts, 0)->bEndpointAddress; data[0] = 1; 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, data, sizeof(data)); if (err < 0) { usb_audio_err(chip, "%d:%d: cannot set enable PITCH\n", iface, ep); return err; } return 0; } 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]; int err; data[0] = 1; 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, data, sizeof(data)); if (err < 0) { usb_audio_err(chip, "%d:%d: cannot set enable PITCH (v2)\n", iface, fmt->altsetting); return err; } return 0; } /* * initialize the pitch control and sample rate */ int snd_usb_init_pitch(struct snd_usb_audio *chip, int iface, struct usb_host_interface *alts, struct audioformat *fmt) { /* if endpoint doesn't have pitch control, bail out */ if (!(fmt->attributes & UAC_EP_CS_ATTR_PITCH_CONTROL)) return 0; switch (fmt->protocol) { case UAC_VERSION_1: default: return init_pitch_v1(chip, iface, alts, fmt); case UAC_VERSION_2: return init_pitch_v2(chip, iface, alts, fmt); } } static int start_endpoints(struct snd_usb_substream *subs) { int err; if (!subs->data_endpoint) return -EINVAL; if (!test_and_set_bit(SUBSTREAM_FLAG_DATA_EP_STARTED, &subs->flags)) { struct snd_usb_endpoint *ep = subs->data_endpoint; dev_dbg(&subs->dev->dev, "Starting data EP @%p\n", ep); ep->data_subs = subs; err = snd_usb_endpoint_start(ep); if (err < 0) { clear_bit(SUBSTREAM_FLAG_DATA_EP_STARTED, &subs->flags); return err; } } if (subs->sync_endpoint && !test_and_set_bit(SUBSTREAM_FLAG_SYNC_EP_STARTED, &subs->flags)) { struct snd_usb_endpoint *ep = subs->sync_endpoint; if (subs->data_endpoint->iface != subs->sync_endpoint->iface || subs->data_endpoint->altsetting != subs->sync_endpoint->altsetting) { err = usb_set_interface(subs->dev, subs->sync_endpoint->iface, subs->sync_endpoint->altsetting); if (err < 0) { clear_bit(SUBSTREAM_FLAG_SYNC_EP_STARTED, &subs->flags); dev_err(&subs->dev->dev, "%d:%d: cannot set interface (%d)\n", subs->sync_endpoint->iface, subs->sync_endpoint->altsetting, err); return -EIO; } } dev_dbg(&subs->dev->dev, "Starting sync EP @%p\n", ep); ep->sync_slave = subs->data_endpoint; err = snd_usb_endpoint_start(ep); if (err < 0) { clear_bit(SUBSTREAM_FLAG_SYNC_EP_STARTED, &subs->flags); return err; } } return 0; } static void stop_endpoints(struct snd_usb_substream *subs, bool wait) { if (test_and_clear_bit(SUBSTREAM_FLAG_SYNC_EP_STARTED, &subs->flags)) snd_usb_endpoint_stop(subs->sync_endpoint); if (test_and_clear_bit(SUBSTREAM_FLAG_DATA_EP_STARTED, &subs->flags)) 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); } } static int search_roland_implicit_fb(struct usb_device *dev, int ifnum, unsigned int altsetting, struct usb_host_interface **alts, unsigned int *ep) { struct usb_interface *iface; struct usb_interface_descriptor *altsd; struct usb_endpoint_descriptor *epd; iface = usb_ifnum_to_if(dev, ifnum); if (!iface || iface->num_altsetting < altsetting + 1) return -ENOENT; *alts = &iface->altsetting[altsetting]; altsd = get_iface_desc(*alts); if (altsd->bAlternateSetting != altsetting || altsd->bInterfaceClass != USB_CLASS_VENDOR_SPEC || (altsd->bInterfaceSubClass != 2 && altsd->bInterfaceProtocol != 2 ) || altsd->bNumEndpoints < 1) return -ENOENT; epd = get_endpoint(*alts, 0); if (!usb_endpoint_is_isoc_in(epd) || (epd->bmAttributes & USB_ENDPOINT_USAGE_MASK) != USB_ENDPOINT_USAGE_IMPLICIT_FB) return -ENOENT; *ep = epd->bEndpointAddress; return 0; } /* Setup an implicit feedback endpoint from a quirk. Returns 0 if no quirk * applies. Returns 1 if a quirk was found. */ static int set_sync_ep_implicit_fb_quirk(struct snd_usb_substream *subs, struct usb_device *dev, struct usb_interface_descriptor *altsd, unsigned int attr) { struct usb_host_interface *alts; struct usb_interface *iface; unsigned int ep; unsigned int ifnum; /* Implicit feedback sync EPs consumers are always playback EPs */ if (subs->direction != SNDRV_PCM_STREAM_PLAYBACK) return 0; switch (subs->stream->chip->usb_id) { case USB_ID(0x0763, 0x2030): /* M-Audio Fast Track C400 */ case USB_ID(0x0763, 0x2031): /* M-Audio Fast Track C600 */ ep = 0x81; ifnum = 3; goto add_sync_ep_from_ifnum; case USB_ID(0x0763, 0x2080): /* M-Audio FastTrack Ultra */ case USB_ID(0x0763, 0x2081): ep = 0x81; ifnum = 2; goto add_sync_ep_from_ifnum; case USB_ID(0x2466, 0x8003): /* Fractal Audio Axe-Fx II */ ep = 0x86; ifnum = 2; goto add_sync_ep_from_ifnum; case USB_ID(0x2466, 0x8010): /* Fractal Audio Axe-Fx III */ ep = 0x81; ifnum = 2; goto add_sync_ep_from_ifnum; case USB_ID(0x1397, 0x0002): /* Behringer UFX1204 */ ep = 0x81; ifnum = 1; goto add_sync_ep_from_ifnum; } if (attr == USB_ENDPOINT_SYNC_ASYNC && altsd->bInterfaceClass == USB_CLASS_VENDOR_SPEC && altsd->bInterfaceProtocol == 2 && altsd->bNumEndpoints == 1 && USB_ID_VENDOR(subs->stream->chip->usb_id) == 0x0582 /* Roland */ && search_roland_implicit_fb(dev, altsd->bInterfaceNumber + 1, altsd->bAlternateSetting, &alts, &ep) >= 0) { goto add_sync_ep; } /* No quirk */ return 0; add_sync_ep_from_ifnum: iface = usb_ifnum_to_if(dev, ifnum); if (!iface || iface->num_altsetting == 0) return -EINVAL; alts = &iface->altsetting[1]; add_sync_ep: subs->sync_endpoint = snd_usb_add_endpoint(subs->stream->chip, alts, ep, !subs->direction, SND_USB_ENDPOINT_TYPE_DATA); if (!subs->sync_endpoint) return -EINVAL; subs->data_endpoint->sync_master = subs->sync_endpoint; return 1; } static int set_sync_endpoint(struct snd_usb_substream *subs, struct audioformat *fmt, struct usb_device *dev, struct usb_host_interface *alts, struct usb_interface_descriptor *altsd) { int is_playback = subs->direction == SNDRV_PCM_STREAM_PLAYBACK; unsigned int ep, attr; bool implicit_fb; int err; /* 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; if ((is_playback && (attr != USB_ENDPOINT_SYNC_ASYNC)) || (!is_playback && (attr != USB_ENDPOINT_SYNC_ADAPTIVE))) { /* * In these modes the notion of sync_endpoint is irrelevant. * Reset pointers to avoid using stale data from previously * used settings, e.g. when configuration and endpoints were * changed */ subs->sync_endpoint = NULL; subs->data_endpoint->sync_master = NULL; } err = set_sync_ep_implicit_fb_quirk(subs, dev, altsd, attr); if (err < 0) return err; /* endpoint set by quirk */ if (err > 0) return 0; if (altsd->bNumEndpoints < 2) return 0; if ((is_playback && (attr == USB_ENDPOINT_SYNC_SYNC || attr == USB_ENDPOINT_SYNC_ADAPTIVE)) || (!is_playback && attr != USB_ENDPOINT_SYNC_ADAPTIVE)) return 0; /* * In case of illegal SYNC_NONE for OUT endpoint, we keep going to see * if we don't find a sync endpoint, as on M-Audio Transit. In case of * error fall back to SYNC mode and don't create sync endpoint */ /* 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 */ if ((get_endpoint(alts, 1)->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) != USB_ENDPOINT_XFER_ISOC || (get_endpoint(alts, 1)->bLength >= USB_DT_ENDPOINT_AUDIO_SIZE && get_endpoint(alts, 1)->bSynchAddress != 0)) { dev_err(&dev->dev, "%d:%d : invalid sync pipe. bmAttributes %02x, bLength %d, bSynchAddress %02x\n", fmt->iface, fmt->altsetting, get_endpoint(alts, 1)->bmAttributes, get_endpoint(alts, 1)->bLength, get_endpoint(alts, 1)->bSynchAddress); if (is_playback && attr == USB_ENDPOINT_SYNC_NONE) return 0; return -EINVAL; } ep = get_endpoint(alts, 1)->bEndpointAddress; if (get_endpoint(alts, 0)->bLength >= USB_DT_ENDPOINT_AUDIO_SIZE && ((is_playback && ep != (unsigned int)(get_endpoint(alts, 0)->bSynchAddress | USB_DIR_IN)) || (!is_playback && ep != (unsigned int)(get_endpoint(alts, 0)->bSynchAddress & ~USB_DIR_IN)))) { dev_err(&dev->dev, "%d:%d : invalid sync pipe. is_playback %d, ep %02x, bSynchAddress %02x\n", fmt->iface, fmt->altsetting, is_playback, ep, get_endpoint(alts, 0)->bSynchAddress); if (is_playback && attr == USB_ENDPOINT_SYNC_NONE) return 0; return -EINVAL; } implicit_fb = (get_endpoint(alts, 1)->bmAttributes & USB_ENDPOINT_USAGE_MASK) == USB_ENDPOINT_USAGE_IMPLICIT_FB; subs->sync_endpoint = snd_usb_add_endpoint(subs->stream->chip, alts, ep, !subs->direction, implicit_fb ? SND_USB_ENDPOINT_TYPE_DATA : SND_USB_ENDPOINT_TYPE_SYNC); if (!subs->sync_endpoint) { if (is_playback && attr == USB_ENDPOINT_SYNC_NONE) return 0; return -EINVAL; } subs->data_endpoint->sync_master = subs->sync_endpoint; return 0; } /* * 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; int err; iface = usb_ifnum_to_if(dev, fmt->iface); if (WARN_ON(!iface)) return -EINVAL; alts = usb_altnum_to_altsetting(iface, fmt->altsetting); altsd = get_iface_desc(alts); if (WARN_ON(altsd->bAlternateSetting != fmt->altsetting)) return -EINVAL; if (fmt == subs->cur_audiofmt) return 0; /* close the old interface */ if (subs->interface >= 0 && subs->interface != fmt->iface) { if (!subs->stream->chip->keep_iface) { err = usb_set_interface(subs->dev, subs->interface, 0); if (err < 0) { dev_err(&dev->dev, "%d:%d: return to setting 0 failed (%d)\n", fmt->iface, fmt->altsetting, err); return -EIO; } } subs->interface = -1; subs->altset_idx = 0; } /* set interface */ if (iface->cur_altsetting != alts) { err = snd_usb_select_mode_quirk(subs, fmt); if (err < 0) return -EIO; err = usb_set_interface(dev, fmt->iface, fmt->altsetting); if (err < 0) { dev_err(&dev->dev, "%d:%d: usb_set_interface failed (%d)\n", fmt->iface, fmt->altsetting, err); return -EIO; } dev_dbg(&dev->dev, "setting usb interface %d:%d\n", fmt->iface, fmt->altsetting); snd_usb_set_interface_quirk(dev); } subs->interface = fmt->iface; subs->altset_idx = fmt->altset_idx; 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; err = set_sync_endpoint(subs, fmt, dev, alts, altsd); if (err < 0) return err; err = snd_usb_init_pitch(subs->stream->chip, fmt->iface, alts, fmt); if (err < 0) return err; subs->cur_audiofmt = fmt; snd_usb_set_format_quirk(subs, fmt); return 0; } /* * 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 snd_usb_substream *subs, struct audioformat *fp, struct audioformat *match, int rate, snd_pcm_format_t pcm_format) { int i; int score = 0; if (fp->channels < 1) { dev_dbg(&subs->dev->dev, "%s: (fmt @%p) no channels\n", __func__, fp); return 0; } if (!(fp->formats & pcm_format_to_bits(pcm_format))) { dev_dbg(&subs->dev->dev, "%s: (fmt @%p) no match for format %d\n", __func__, fp, pcm_format); return 0; } for (i = 0; i < fp->nr_rates; i++) { if (fp->rate_table[i] == rate) { score++; break; } } if (!score) { dev_dbg(&subs->dev->dev, "%s: (fmt @%p) no match for rate %d\n", __func__, fp, rate); return 0; } if (fp->channels == match->channels) score++; dev_dbg(&subs->dev->dev, "%s: (fmt @%p) score %d\n", __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]; 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, 0, 0, subs->cur_rate, subs->cur_audiofmt, NULL); /* Try to find the best matching audioformat. */ list_for_each_entry(fp, &sync_subs->fmt_list, list) { int score = match_endpoint_audioformats(subs, 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)) { dev_err(&subs->dev->dev, "%s: no valid audioformat for sync ep %x found\n", __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; dev_dbg(&subs->dev->dev, "%s: adjusted sync ep period bytes (%d -> %d)\n", __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, 0, 0, subs->cur_rate, sync_fp, NULL); return ret; } /* * 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, true); ret = snd_usb_endpoint_set_params(subs->data_endpoint, subs->pcm_format, subs->channels, subs->period_bytes, subs->period_frames, subs->buffer_periods, subs->cur_rate, subs->cur_audiofmt, subs->sync_endpoint); if (ret < 0) return ret; if (subs->sync_endpoint) ret = configure_sync_endpoint(subs); return ret; } static int snd_usb_pcm_change_state(struct snd_usb_substream *subs, int state) { int ret; if (!subs->str_pd) return 0; ret = snd_usb_power_domain_set(subs->stream->chip, subs->str_pd, state); if (ret < 0) { dev_err(&subs->dev->dev, "Cannot change Power Domain ID: %d to state: %d. Err: %d\n", subs->str_pd->pd_id, state, ret); return ret; } return 0; } int snd_usb_pcm_suspend(struct snd_usb_stream *as) { int ret; ret = snd_usb_pcm_change_state(&as->substream[0], UAC3_PD_STATE_D2); if (ret < 0) return ret; ret = snd_usb_pcm_change_state(&as->substream[1], UAC3_PD_STATE_D2); if (ret < 0) return ret; return 0; } int snd_usb_pcm_resume(struct snd_usb_stream *as) { int ret; ret = snd_usb_pcm_change_state(&as->substream[0], UAC3_PD_STATE_D1); if (ret < 0) return ret; ret = snd_usb_pcm_change_state(&as->substream[1], UAC3_PD_STATE_D1); if (ret < 0) return ret; return 0; } /* * 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; int ret; if (snd_usb_use_vmalloc) ret = snd_pcm_lib_alloc_vmalloc_buffer(substream, params_buffer_bytes(hw_params)); else ret = snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(hw_params)); if (ret < 0) return ret; subs->pcm_format = params_format(hw_params); subs->period_bytes = params_period_bytes(hw_params); subs->period_frames = params_period_size(hw_params); subs->buffer_periods = params_periods(hw_params); subs->channels = params_channels(hw_params); subs->cur_rate = params_rate(hw_params); fmt = find_format(subs); if (!fmt) { dev_dbg(&subs->dev->dev, "cannot set format: format = %#x, rate = %d, channels = %d\n", subs->pcm_format, subs->cur_rate, subs->channels); return -EINVAL; } ret = snd_usb_lock_shutdown(subs->stream->chip); if (ret < 0) return ret; ret = snd_usb_pcm_change_state(subs, UAC3_PD_STATE_D0); if (ret < 0) goto unlock; ret = set_format(subs, fmt); if (ret < 0) goto unlock; subs->interface = fmt->iface; subs->altset_idx = fmt->altset_idx; subs->need_setup_ep = true; unlock: snd_usb_unlock_shutdown(subs->stream->chip); return ret; } /* * 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; if (!snd_usb_lock_shutdown(subs->stream->chip)) { stop_endpoints(subs, true); snd_usb_endpoint_deactivate(subs->sync_endpoint); snd_usb_endpoint_deactivate(subs->data_endpoint); snd_usb_unlock_shutdown(subs->stream->chip); } if (snd_usb_use_vmalloc) return snd_pcm_lib_free_vmalloc_buffer(substream); else return snd_pcm_lib_free_pages(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; struct usb_host_interface *alts; struct usb_interface *iface; int ret; if (! subs->cur_audiofmt) { dev_err(&subs->dev->dev, "no format is specified!\n"); return -ENXIO; } ret = snd_usb_lock_shutdown(subs->stream->chip); if (ret < 0) return ret; if (snd_BUG_ON(!subs->data_endpoint)) { ret = -EIO; goto unlock; } snd_usb_endpoint_sync_pending_stop(subs->sync_endpoint); snd_usb_endpoint_sync_pending_stop(subs->data_endpoint); ret = snd_usb_pcm_change_state(subs, UAC3_PD_STATE_D0); if (ret < 0) goto unlock; ret = set_format(subs, subs->cur_audiofmt); if (ret < 0) goto unlock; if (subs->need_setup_ep) { 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; ret = configure_endpoint(subs); if (ret < 0) goto unlock; subs->need_setup_ep = false; } /* some unit conversions in runtime */ subs->data_endpoint->maxframesize = bytes_to_frames(runtime, subs->data_endpoint->maxpacksize); subs->data_endpoint->curframesize = bytes_to_frames(runtime, subs->data_endpoint->curpacksize); /* reset the pointer */ subs->hwptr_done = 0; subs->transfer_done = 0; subs->last_delay = 0; subs->last_frame_number = 0; runtime->delay = 0; /* 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) ret = start_endpoints(subs); unlock: snd_usb_unlock_shutdown(subs->stream->chip); return ret; } static const 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); struct snd_mask check_fmts; unsigned int ptime; /* check the format */ 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)) { hwc_debug(" > check: no supported format %d\n", 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)\n", 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\n", 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\n", fp->rate_max, it->min); return 0; } /* check whether the period time is >= the data packet interval */ 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 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; struct audioformat *fp; 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)\n", it->min, it->max); changed = 0; rmin = rmax = 0; list_for_each_entry(fp, &subs->fmt_list, list) { 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\n"); 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)\n", 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; struct audioformat *fp; 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)\n", it->min, it->max); changed = 0; rmin = rmax = 0; list_for_each_entry(fp, &subs->fmt_list, list) { 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\n"); 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)\n", 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; struct audioformat *fp; 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\n", fmt->bits[0], fmt->bits[1]); fbits = 0; list_for_each_entry(fp, &subs->fmt_list, list) { if (!hw_check_valid_format(subs, params, fp)) continue; fbits |= fp->formats; } 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\n"); return -EINVAL; } changed = (oldbits[0] != fmt->bits[0] || oldbits[1] != fmt->bits[1]); hwc_debug(" --> %x:%x (changed = %d)\n", 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)\n", it->min, it->max); min_datainterval = 0xff; list_for_each_entry(fp, &subs->fmt_list, list) { if (!hw_check_valid_format(subs, params, fp)) continue; min_datainterval = min(min_datainterval, fp->datainterval); } if (min_datainterval == 0xff) { hwc_debug(" --> get empty\n"); it->empty = 1; return -EINVAL; } pmin = 125 * (1 << min_datainterval); changed = 0; if (it->min < pmin) { it->min = pmin; it->openmin = 0; changed = 1; } if (snd_interval_checkempty(it)) { it->empty = 1; return -EINVAL; } hwc_debug(" --> (%u,%u) (changed = %d)\n", it->min, it->max, changed); return changed; } /* * 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; int *rate_list; int count = 0, needs_knot = 0; int err; kfree(subs->rate_list.list); subs->rate_list.list = NULL; 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; subs->rate_list.list = rate_list = kmalloc_array(count, sizeof(int), GFP_KERNEL); if (!subs->rate_list.list) return -ENOMEM; subs->rate_list.count = count; 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++) rate_list[count++] = fp->rate_table[i]; } err = snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, &subs->rate_list); if (err < 0) return err; return 0; } /* * set up the runtime hardware information. */ static int setup_hw_info(struct snd_pcm_runtime *runtime, struct snd_usb_substream *subs) { struct audioformat *fp; 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 */ list_for_each_entry(fp, &subs->fmt_list, list) { 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); } param_period_time_if_needed = SNDRV_PCM_HW_PARAM_PERIOD_TIME; if (subs->speed == USB_SPEED_FULL) /* 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; err = snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_PERIOD_TIME, ptmin, UINT_MAX); if (err < 0) return err; 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); if (err < 0) return err; 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); if (err < 0) return err; 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); if (err < 0) return err; if (param_period_time_if_needed >= 0) { err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_TIME, hw_rule_period_time, subs, SNDRV_PCM_HW_PARAM_FORMAT, SNDRV_PCM_HW_PARAM_CHANNELS, SNDRV_PCM_HW_PARAM_RATE, -1); if (err < 0) return err; } err = snd_usb_pcm_check_knot(runtime, subs); if (err < 0) return err; return snd_usb_autoresume(subs->stream->chip); } static int snd_usb_pcm_open(struct snd_pcm_substream *substream) { int direction = substream->stream; 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; subs->altset_idx = 0; runtime->hw = snd_usb_hardware; runtime->private_data = subs; subs->pcm_substream = substream; /* runtime PM is also done there */ /* initialize DSD/DOP context */ subs->dsd_dop.byte_idx = 0; subs->dsd_dop.channel = 0; subs->dsd_dop.marker = 1; return setup_hw_info(runtime, subs); } static int snd_usb_pcm_close(struct snd_pcm_substream *substream) { int direction = substream->stream; struct snd_usb_stream *as = snd_pcm_substream_chip(substream); struct snd_usb_substream *subs = &as->substream[direction]; int ret; stop_endpoints(subs, true); if (!as->chip->keep_iface && subs->interface >= 0 && !snd_usb_lock_shutdown(subs->stream->chip)) { usb_set_interface(subs->dev, subs->interface, 0); subs->interface = -1; ret = snd_usb_pcm_change_state(subs, UAC3_PD_STATE_D1); snd_usb_unlock_shutdown(subs->stream->chip); if (ret < 0) return ret; } subs->pcm_substream = NULL; snd_usb_autosuspend(subs->stream->chip); return 0; } /* 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; int current_frame_number; /* read frame number here, update pointer in critical section */ current_frame_number = usb_get_current_frame_number(subs->dev); stride = runtime->frame_bits >> 3; for (i = 0; i < urb->number_of_packets; i++) { cp = (unsigned char *)urb->transfer_buffer + urb->iso_frame_desc[i].offset + subs->pkt_offset_adj; if (urb->iso_frame_desc[i].status && printk_ratelimit()) { dev_dbg(&subs->dev->dev, "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) { int oldbytes = bytes; bytes = frames * stride; dev_warn_ratelimited(&subs->dev->dev, "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; } /* 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 */ spin_unlock_irqrestore(&subs->lock, flags); /* copy a data chunk */ if (oldptr + bytes > runtime->buffer_size * stride) { unsigned int bytes1 = runtime->buffer_size * stride - oldptr; memcpy(runtime->dma_area + oldptr, cp, bytes1); memcpy(runtime->dma_area, cp + bytes1, bytes - bytes1); } else { memcpy(runtime->dma_area + oldptr, cp, bytes); } } if (period_elapsed) snd_pcm_period_elapsed(subs->pcm_substream); } static 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; if (subs->cur_audiofmt->dsd_bitrev) dst[dst_idx++] = bitrev8(src[idx]); else dst[dst_idx++] = src[idx]; subs->hwptr_done++; } } if (subs->hwptr_done >= runtime->buffer_size * stride) subs->hwptr_done -= runtime->buffer_size * stride; } static void copy_to_urb(struct snd_usb_substream *subs, struct urb *urb, int offset, int stride, unsigned int bytes) { struct snd_pcm_runtime *runtime = subs->pcm_substream->runtime; 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 + offset, runtime->dma_area + subs->hwptr_done, bytes1); memcpy(urb->transfer_buffer + offset + bytes1, runtime->dma_area, bytes - bytes1); } else { memcpy(urb->transfer_buffer + offset, 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; } static unsigned int copy_to_urb_quirk(struct snd_usb_substream *subs, struct urb *urb, int stride, unsigned int bytes) { __le32 packet_length; int i; /* Put __le32 length descriptor at start of each packet. */ for (i = 0; i < urb->number_of_packets; i++) { unsigned int length = urb->iso_frame_desc[i].length; unsigned int offset = urb->iso_frame_desc[i].offset; packet_length = cpu_to_le32(length); offset += i * sizeof(packet_length); urb->iso_frame_desc[i].offset = offset; urb->iso_frame_desc[i].length += sizeof(packet_length); memcpy(urb->transfer_buffer + offset, &packet_length, sizeof(packet_length)); copy_to_urb(subs, urb, offset + sizeof(packet_length), stride, length); } /* Adjust transfer size accordingly. */ bytes += urb->number_of_packets * sizeof(packet_length); return bytes; } static void prepare_playback_urb(struct snd_usb_substream *subs, struct urb *urb) { struct snd_pcm_runtime *runtime = subs->pcm_substream->runtime; struct snd_usb_endpoint *ep = subs->data_endpoint; 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); subs->frame_limit += ep->max_urb_frames; for (i = 0; i < ctx->packets; i++) { if (ctx->packet_size[i]) counts = ctx->packet_size[i]; else counts = snd_usb_endpoint_next_packet_size(ep); /* set up descriptor */ urb->iso_frame_desc[i].offset = frames * ep->stride; urb->iso_frame_desc[i].length = counts * ep->stride; frames += counts; urb->number_of_packets++; subs->transfer_done += counts; if (subs->transfer_done >= runtime->period_size) { subs->transfer_done -= runtime->period_size; subs->frame_limit = 0; 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 * ep->stride; subs->transfer_done = 0; } i++; if (i < ctx->packets) { /* add a transfer delimiter */ urb->iso_frame_desc[i].offset = frames * ep->stride; urb->iso_frame_desc[i].length = 0; urb->number_of_packets++; } break; } } /* finish at the period boundary or after enough frames */ if ((period_elapsed || subs->transfer_done >= subs->frame_limit) && !snd_usb_endpoint_implicit_feedback_sink(ep)) break; } bytes = frames * ep->stride; if (unlikely(subs->pcm_format == SNDRV_PCM_FORMAT_DSD_U16_LE && subs->cur_audiofmt->dsd_dop)) { fill_playback_urb_dsd_dop(subs, urb, bytes); } 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; if (subs->hwptr_done >= runtime->buffer_size * stride) subs->hwptr_done -= runtime->buffer_size * stride; } else { /* usual PCM */ if (!subs->tx_length_quirk) copy_to_urb(subs, urb, 0, stride, bytes); else bytes = copy_to_urb_quirk(subs, urb, stride, bytes); /* bytes is now amount of outgoing data */ } /* 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 */ if (subs->trigger_tstamp_pending_update) { /* this is the first actual URB submitted, * update trigger timestamp to reflect actual start time */ snd_pcm_gettime(runtime, &runtime->trigger_tstamp); subs->trigger_tstamp_pending_update = false; } 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; struct snd_usb_endpoint *ep = subs->data_endpoint; int processed = urb->transfer_buffer_length / ep->stride; int est_delay; /* ignore the delay accounting when procssed=0 is given, i.e. * silent payloads are procssed before handling the actual data */ if (!processed) return; spin_lock_irqsave(&subs->lock, flags); if (!subs->last_delay) goto out; /* short path */ 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) dev_dbg_ratelimited(&subs->dev->dev, "delay: estimated %d, actual %d\n", est_delay, subs->last_delay); 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: spin_unlock_irqrestore(&subs->lock, flags); } 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: subs->trigger_tstamp_pending_update = true; /* fall through */ case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: subs->data_endpoint->prepare_data_urb = prepare_playback_urb; subs->data_endpoint->retire_data_urb = retire_playback_urb; subs->running = 1; return 0; case SNDRV_PCM_TRIGGER_STOP: stop_endpoints(subs, false); subs->running = 0; return 0; case SNDRV_PCM_TRIGGER_PAUSE_PUSH: subs->data_endpoint->prepare_data_urb = NULL; /* keep retire_data_urb for delay calculation */ subs->data_endpoint->retire_data_urb = retire_playback_urb; subs->running = 0; return 0; } return -EINVAL; } static int snd_usb_substream_capture_trigger(struct snd_pcm_substream *substream, int cmd) { int err; struct snd_usb_substream *subs = substream->runtime->private_data; switch (cmd) { case SNDRV_PCM_TRIGGER_START: err = start_endpoints(subs); if (err < 0) return err; subs->data_endpoint->retire_data_urb = retire_capture_urb; subs->running = 1; return 0; case SNDRV_PCM_TRIGGER_STOP: stop_endpoints(subs, false); subs->running = 0; return 0; case SNDRV_PCM_TRIGGER_PAUSE_PUSH: subs->data_endpoint->retire_data_urb = NULL; subs->running = 0; return 0; case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: subs->data_endpoint->retire_data_urb = retire_capture_urb; subs->running = 1; return 0; } return -EINVAL; } static const struct snd_pcm_ops snd_usb_playback_ops = { .open = snd_usb_pcm_open, .close = snd_usb_pcm_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, }; static const struct snd_pcm_ops snd_usb_capture_ops = { .open = snd_usb_pcm_open, .close = snd_usb_pcm_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, }; static const struct snd_pcm_ops snd_usb_playback_dev_ops = { .open = snd_usb_pcm_open, .close = snd_usb_pcm_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_sgbuf_ops_page, }; static const struct snd_pcm_ops snd_usb_capture_dev_ops = { .open = snd_usb_pcm_open, .close = snd_usb_pcm_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_sgbuf_ops_page, }; void snd_usb_set_pcm_ops(struct snd_pcm *pcm, int stream) { const struct snd_pcm_ops *ops; if (snd_usb_use_vmalloc) ops = stream == SNDRV_PCM_STREAM_PLAYBACK ? &snd_usb_playback_ops : &snd_usb_capture_ops; else ops = stream == SNDRV_PCM_STREAM_PLAYBACK ? &snd_usb_playback_dev_ops : &snd_usb_capture_dev_ops; snd_pcm_set_ops(pcm, stream, ops); } void snd_usb_preallocate_buffer(struct snd_usb_substream *subs) { struct snd_pcm *pcm = subs->stream->pcm; struct snd_pcm_substream *s = pcm->streams[subs->direction].substream; struct device *dev = subs->dev->bus->controller; if (!snd_usb_use_vmalloc) snd_pcm_lib_preallocate_pages(s, SNDRV_DMA_TYPE_DEV_SG, dev, 64*1024, 512*1024); }
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