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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-23 17:30:02 +00:00
![Takashi Iwai](/assets/img/avatar_default.png)
This reverts commitff878b408a
. Unfortunately the recent fix seems bringing another regressions with PulseAudio / pipewire, at least for Steinberg and MOTU devices. As a temporary solution, do a straight revert. The issue for Android will be revisited again later by another different fix (if any). Fixes:ff878b408a
("ALSA: usb-audio: Split endpoint setups for hw_params and prepare") Cc: <stable@vger.kernel.org> BugLink: https://bugzilla.kernel.org/show_bug.cgi?id=216500 Link: https://lore.kernel.org/r/20220920113929.25162-1-tiwai@suse.de Signed-off-by: Takashi Iwai <tiwai@suse.de>
1704 lines
46 KiB
C
1704 lines
46 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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*/
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#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>
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#include <linux/usb/audio.h>
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#include <linux/usb/audio-v2.h>
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#include <sound/core.h>
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#include <sound/pcm.h>
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#include <sound/pcm_params.h>
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#include "usbaudio.h"
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#include "card.h"
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#include "quirks.h"
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#include "endpoint.h"
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#include "helper.h"
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#include "pcm.h"
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#include "clock.h"
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#include "power.h"
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#include "media.h"
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#include "implicit.h"
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#define SUBSTREAM_FLAG_DATA_EP_STARTED 0
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#define SUBSTREAM_FLAG_SYNC_EP_STARTED 1
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/* return the estimated delay based on USB frame counters */
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static snd_pcm_uframes_t snd_usb_pcm_delay(struct snd_usb_substream *subs,
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struct snd_pcm_runtime *runtime)
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{
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unsigned int current_frame_number;
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unsigned int frame_diff;
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int est_delay;
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int queued;
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if (subs->direction == SNDRV_PCM_STREAM_PLAYBACK) {
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queued = bytes_to_frames(runtime, subs->inflight_bytes);
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if (!queued)
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return 0;
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} else if (!subs->running) {
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return 0;
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}
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current_frame_number = usb_get_current_frame_number(subs->dev);
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/*
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* HCD implementations use different widths, use lower 8 bits.
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* The delay will be managed up to 256ms, which is more than
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* enough
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*/
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frame_diff = (current_frame_number - subs->last_frame_number) & 0xff;
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/* Approximation based on number of samples per USB frame (ms),
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some truncation for 44.1 but the estimate is good enough */
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est_delay = frame_diff * runtime->rate / 1000;
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if (subs->direction == SNDRV_PCM_STREAM_PLAYBACK) {
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est_delay = queued - est_delay;
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if (est_delay < 0)
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est_delay = 0;
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}
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return est_delay;
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}
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/*
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* return the current pcm pointer. just based on the hwptr_done value.
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*/
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static snd_pcm_uframes_t snd_usb_pcm_pointer(struct snd_pcm_substream *substream)
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{
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struct snd_pcm_runtime *runtime = substream->runtime;
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struct snd_usb_substream *subs = runtime->private_data;
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unsigned int hwptr_done;
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if (atomic_read(&subs->stream->chip->shutdown))
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return SNDRV_PCM_POS_XRUN;
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spin_lock(&subs->lock);
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hwptr_done = subs->hwptr_done;
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runtime->delay = snd_usb_pcm_delay(subs, runtime);
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spin_unlock(&subs->lock);
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return bytes_to_frames(runtime, hwptr_done);
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}
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/*
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* find a matching audio format
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*/
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static const struct audioformat *
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find_format(struct list_head *fmt_list_head, snd_pcm_format_t format,
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unsigned int rate, unsigned int channels, bool strict_match,
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struct snd_usb_substream *subs)
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{
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const struct audioformat *fp;
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const struct audioformat *found = NULL;
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int cur_attr = 0, attr;
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list_for_each_entry(fp, fmt_list_head, list) {
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if (strict_match) {
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if (!(fp->formats & pcm_format_to_bits(format)))
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continue;
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if (fp->channels != channels)
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continue;
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}
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if (rate < fp->rate_min || rate > fp->rate_max)
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continue;
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if (!(fp->rates & SNDRV_PCM_RATE_CONTINUOUS)) {
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unsigned int i;
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for (i = 0; i < fp->nr_rates; i++)
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if (fp->rate_table[i] == rate)
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break;
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if (i >= fp->nr_rates)
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continue;
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}
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attr = fp->ep_attr & USB_ENDPOINT_SYNCTYPE;
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if (!found) {
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found = fp;
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cur_attr = attr;
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continue;
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}
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/* avoid async out and adaptive in if the other method
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* supports the same format.
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* this is a workaround for the case like
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* M-audio audiophile USB.
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*/
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if (subs && attr != cur_attr) {
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if ((attr == USB_ENDPOINT_SYNC_ASYNC &&
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subs->direction == SNDRV_PCM_STREAM_PLAYBACK) ||
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(attr == USB_ENDPOINT_SYNC_ADAPTIVE &&
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subs->direction == SNDRV_PCM_STREAM_CAPTURE))
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continue;
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if ((cur_attr == USB_ENDPOINT_SYNC_ASYNC &&
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subs->direction == SNDRV_PCM_STREAM_PLAYBACK) ||
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(cur_attr == USB_ENDPOINT_SYNC_ADAPTIVE &&
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subs->direction == SNDRV_PCM_STREAM_CAPTURE)) {
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found = fp;
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cur_attr = attr;
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continue;
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}
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}
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/* find the format with the largest max. packet size */
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if (fp->maxpacksize > found->maxpacksize) {
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found = fp;
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cur_attr = attr;
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}
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}
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return found;
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}
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static const struct audioformat *
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find_substream_format(struct snd_usb_substream *subs,
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const struct snd_pcm_hw_params *params)
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{
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return find_format(&subs->fmt_list, params_format(params),
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params_rate(params), params_channels(params),
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true, subs);
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}
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static int init_pitch_v1(struct snd_usb_audio *chip, int ep)
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{
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struct usb_device *dev = chip->dev;
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unsigned char data[1];
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int err;
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data[0] = 1;
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err = snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), UAC_SET_CUR,
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USB_TYPE_CLASS|USB_RECIP_ENDPOINT|USB_DIR_OUT,
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UAC_EP_CS_ATTR_PITCH_CONTROL << 8, ep,
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data, sizeof(data));
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return err;
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}
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static int init_pitch_v2(struct snd_usb_audio *chip, int ep)
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{
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struct usb_device *dev = chip->dev;
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unsigned char data[1];
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int err;
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data[0] = 1;
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err = snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), UAC2_CS_CUR,
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USB_TYPE_CLASS | USB_RECIP_ENDPOINT | USB_DIR_OUT,
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UAC2_EP_CS_PITCH << 8, 0,
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data, sizeof(data));
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return err;
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}
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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,
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const struct audioformat *fmt)
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{
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int err;
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/* if endpoint doesn't have pitch control, bail out */
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if (!(fmt->attributes & UAC_EP_CS_ATTR_PITCH_CONTROL))
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return 0;
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usb_audio_dbg(chip, "enable PITCH for EP 0x%x\n", fmt->endpoint);
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switch (fmt->protocol) {
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case UAC_VERSION_1:
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err = init_pitch_v1(chip, fmt->endpoint);
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break;
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case UAC_VERSION_2:
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err = init_pitch_v2(chip, fmt->endpoint);
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break;
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default:
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return 0;
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}
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if (err < 0) {
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usb_audio_err(chip, "failed to enable PITCH for EP 0x%x\n",
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fmt->endpoint);
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return err;
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}
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return 0;
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}
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static bool stop_endpoints(struct snd_usb_substream *subs, bool keep_pending)
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{
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bool stopped = 0;
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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, keep_pending);
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stopped = true;
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}
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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, keep_pending);
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stopped = true;
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}
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return stopped;
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}
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static int start_endpoints(struct snd_usb_substream *subs)
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{
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int err;
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if (!subs->data_endpoint)
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return -EINVAL;
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if (!test_and_set_bit(SUBSTREAM_FLAG_DATA_EP_STARTED, &subs->flags)) {
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err = snd_usb_endpoint_start(subs->data_endpoint);
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if (err < 0) {
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clear_bit(SUBSTREAM_FLAG_DATA_EP_STARTED, &subs->flags);
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goto error;
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}
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}
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if (subs->sync_endpoint &&
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!test_and_set_bit(SUBSTREAM_FLAG_SYNC_EP_STARTED, &subs->flags)) {
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err = snd_usb_endpoint_start(subs->sync_endpoint);
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if (err < 0) {
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clear_bit(SUBSTREAM_FLAG_SYNC_EP_STARTED, &subs->flags);
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goto error;
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}
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}
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return 0;
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error:
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stop_endpoints(subs, false);
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return err;
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}
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static void sync_pending_stops(struct snd_usb_substream *subs)
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{
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snd_usb_endpoint_sync_pending_stop(subs->sync_endpoint);
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snd_usb_endpoint_sync_pending_stop(subs->data_endpoint);
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}
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/* PCM sync_stop callback */
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static int snd_usb_pcm_sync_stop(struct snd_pcm_substream *substream)
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{
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struct snd_usb_substream *subs = substream->runtime->private_data;
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sync_pending_stops(subs);
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return 0;
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}
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/* Set up sync endpoint */
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int snd_usb_audioformat_set_sync_ep(struct snd_usb_audio *chip,
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struct audioformat *fmt)
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{
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struct usb_device *dev = chip->dev;
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struct usb_host_interface *alts;
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struct usb_interface_descriptor *altsd;
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unsigned int ep, attr, sync_attr;
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bool is_playback;
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int err;
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if (fmt->sync_ep)
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return 0; /* already set up */
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alts = snd_usb_get_host_interface(chip, fmt->iface, fmt->altsetting);
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if (!alts)
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return 0;
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altsd = get_iface_desc(alts);
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err = snd_usb_parse_implicit_fb_quirk(chip, fmt, alts);
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if (err > 0)
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return 0; /* matched */
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/*
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* Generic sync EP handling
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*/
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if (fmt->ep_idx > 0 || altsd->bNumEndpoints < 2)
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return 0;
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is_playback = !(get_endpoint(alts, 0)->bEndpointAddress & USB_DIR_IN);
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attr = fmt->ep_attr & USB_ENDPOINT_SYNCTYPE;
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if ((is_playback && (attr == USB_ENDPOINT_SYNC_SYNC ||
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attr == USB_ENDPOINT_SYNC_ADAPTIVE)) ||
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(!is_playback && attr != USB_ENDPOINT_SYNC_ADAPTIVE))
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return 0;
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sync_attr = get_endpoint(alts, 1)->bmAttributes;
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/*
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* In case of illegal SYNC_NONE for OUT endpoint, we keep going to see
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* if we don't find a sync endpoint, as on M-Audio Transit. In case of
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* error fall back to SYNC mode and don't create sync endpoint
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*/
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/* check sync-pipe endpoint */
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/* ... and check descriptor size before accessing bSynchAddress
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because there is a version of the SB Audigy 2 NX firmware lacking
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the audio fields in the endpoint descriptors */
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if ((sync_attr & 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)) {
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dev_err(&dev->dev,
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"%d:%d : invalid sync pipe. bmAttributes %02x, bLength %d, bSynchAddress %02x\n",
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fmt->iface, fmt->altsetting,
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get_endpoint(alts, 1)->bmAttributes,
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get_endpoint(alts, 1)->bLength,
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get_endpoint(alts, 1)->bSynchAddress);
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if (is_playback && attr == USB_ENDPOINT_SYNC_NONE)
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return 0;
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return -EINVAL;
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}
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ep = get_endpoint(alts, 1)->bEndpointAddress;
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if (get_endpoint(alts, 0)->bLength >= USB_DT_ENDPOINT_AUDIO_SIZE &&
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get_endpoint(alts, 0)->bSynchAddress != 0 &&
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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)))) {
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dev_err(&dev->dev,
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"%d:%d : invalid sync pipe. is_playback %d, ep %02x, bSynchAddress %02x\n",
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fmt->iface, fmt->altsetting,
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is_playback, ep, get_endpoint(alts, 0)->bSynchAddress);
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if (is_playback && attr == USB_ENDPOINT_SYNC_NONE)
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return 0;
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return -EINVAL;
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}
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fmt->sync_ep = ep;
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fmt->sync_iface = altsd->bInterfaceNumber;
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fmt->sync_altsetting = altsd->bAlternateSetting;
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fmt->sync_ep_idx = 1;
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if ((sync_attr & USB_ENDPOINT_USAGE_MASK) == USB_ENDPOINT_USAGE_IMPLICIT_FB)
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fmt->implicit_fb = 1;
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dev_dbg(&dev->dev, "%d:%d: found sync_ep=0x%x, iface=%d, alt=%d, implicit_fb=%d\n",
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fmt->iface, fmt->altsetting, fmt->sync_ep, fmt->sync_iface,
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fmt->sync_altsetting, fmt->implicit_fb);
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return 0;
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}
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static int snd_usb_pcm_change_state(struct snd_usb_substream *subs, int state)
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{
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int ret;
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if (!subs->str_pd)
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return 0;
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ret = snd_usb_power_domain_set(subs->stream->chip, subs->str_pd, state);
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if (ret < 0) {
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dev_err(&subs->dev->dev,
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"Cannot change Power Domain ID: %d to state: %d. Err: %d\n",
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subs->str_pd->pd_id, state, ret);
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return ret;
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}
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return 0;
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}
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int snd_usb_pcm_suspend(struct snd_usb_stream *as)
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{
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int ret;
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ret = snd_usb_pcm_change_state(&as->substream[0], UAC3_PD_STATE_D2);
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if (ret < 0)
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return ret;
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ret = snd_usb_pcm_change_state(&as->substream[1], UAC3_PD_STATE_D2);
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if (ret < 0)
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return ret;
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return 0;
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}
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int snd_usb_pcm_resume(struct snd_usb_stream *as)
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{
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int ret;
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ret = snd_usb_pcm_change_state(&as->substream[0], UAC3_PD_STATE_D1);
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if (ret < 0)
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return ret;
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ret = snd_usb_pcm_change_state(&as->substream[1], UAC3_PD_STATE_D1);
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if (ret < 0)
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return ret;
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return 0;
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}
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|
|
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static void close_endpoints(struct snd_usb_audio *chip,
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struct snd_usb_substream *subs)
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{
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if (subs->data_endpoint) {
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snd_usb_endpoint_set_sync(chip, subs->data_endpoint, NULL);
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snd_usb_endpoint_close(chip, subs->data_endpoint);
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subs->data_endpoint = NULL;
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}
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|
|
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if (subs->sync_endpoint) {
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snd_usb_endpoint_close(chip, subs->sync_endpoint);
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subs->sync_endpoint = NULL;
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}
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}
|
|
|
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static int configure_endpoints(struct snd_usb_audio *chip,
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struct snd_usb_substream *subs)
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{
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int err;
|
|
|
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if (subs->data_endpoint->need_setup) {
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/* stop any running stream beforehand */
|
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if (stop_endpoints(subs, false))
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sync_pending_stops(subs);
|
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if (subs->sync_endpoint) {
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err = snd_usb_endpoint_configure(chip, subs->sync_endpoint);
|
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if (err < 0)
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return err;
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}
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err = snd_usb_endpoint_configure(chip, subs->data_endpoint);
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if (err < 0)
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return err;
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snd_usb_set_format_quirk(subs, subs->cur_audiofmt);
|
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} else {
|
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if (subs->sync_endpoint) {
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err = snd_usb_endpoint_configure(chip, subs->sync_endpoint);
|
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if (err < 0)
|
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return err;
|
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}
|
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}
|
|
|
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return 0;
|
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}
|
|
|
|
/*
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* hw_params callback
|
|
*
|
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* allocate a buffer and set the given audio format.
|
|
*
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* so far we use a physically linear buffer although packetize transfer
|
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* doesn't need a continuous area.
|
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* if sg buffer is supported on the later version of alsa, we'll follow
|
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* that.
|
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*/
|
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static int snd_usb_hw_params(struct snd_pcm_substream *substream,
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struct snd_pcm_hw_params *hw_params)
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{
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struct snd_usb_substream *subs = substream->runtime->private_data;
|
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struct snd_usb_audio *chip = subs->stream->chip;
|
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const struct audioformat *fmt;
|
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const struct audioformat *sync_fmt;
|
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int ret;
|
|
|
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ret = snd_media_start_pipeline(subs);
|
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if (ret)
|
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return ret;
|
|
|
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fmt = find_substream_format(subs, hw_params);
|
|
if (!fmt) {
|
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usb_audio_dbg(chip,
|
|
"cannot find format: format=%s, rate=%d, channels=%d\n",
|
|
snd_pcm_format_name(params_format(hw_params)),
|
|
params_rate(hw_params), params_channels(hw_params));
|
|
ret = -EINVAL;
|
|
goto stop_pipeline;
|
|
}
|
|
|
|
if (fmt->implicit_fb) {
|
|
sync_fmt = snd_usb_find_implicit_fb_sync_format(chip, fmt,
|
|
hw_params,
|
|
!substream->stream);
|
|
if (!sync_fmt) {
|
|
usb_audio_dbg(chip,
|
|
"cannot find sync format: ep=0x%x, iface=%d:%d, format=%s, rate=%d, channels=%d\n",
|
|
fmt->sync_ep, fmt->sync_iface,
|
|
fmt->sync_altsetting,
|
|
snd_pcm_format_name(params_format(hw_params)),
|
|
params_rate(hw_params), params_channels(hw_params));
|
|
ret = -EINVAL;
|
|
goto stop_pipeline;
|
|
}
|
|
} else {
|
|
sync_fmt = fmt;
|
|
}
|
|
|
|
ret = snd_usb_lock_shutdown(chip);
|
|
if (ret < 0)
|
|
goto stop_pipeline;
|
|
|
|
ret = snd_usb_pcm_change_state(subs, UAC3_PD_STATE_D0);
|
|
if (ret < 0)
|
|
goto unlock;
|
|
|
|
if (subs->data_endpoint) {
|
|
if (snd_usb_endpoint_compatible(chip, subs->data_endpoint,
|
|
fmt, hw_params))
|
|
goto unlock;
|
|
close_endpoints(chip, subs);
|
|
}
|
|
|
|
subs->data_endpoint = snd_usb_endpoint_open(chip, fmt, hw_params, false);
|
|
if (!subs->data_endpoint) {
|
|
ret = -EINVAL;
|
|
goto unlock;
|
|
}
|
|
|
|
if (fmt->sync_ep) {
|
|
subs->sync_endpoint = snd_usb_endpoint_open(chip, sync_fmt,
|
|
hw_params,
|
|
fmt == sync_fmt);
|
|
if (!subs->sync_endpoint) {
|
|
ret = -EINVAL;
|
|
goto unlock;
|
|
}
|
|
|
|
snd_usb_endpoint_set_sync(chip, subs->data_endpoint,
|
|
subs->sync_endpoint);
|
|
}
|
|
|
|
mutex_lock(&chip->mutex);
|
|
subs->cur_audiofmt = fmt;
|
|
mutex_unlock(&chip->mutex);
|
|
|
|
ret = configure_endpoints(chip, subs);
|
|
|
|
unlock:
|
|
if (ret < 0)
|
|
close_endpoints(chip, subs);
|
|
|
|
snd_usb_unlock_shutdown(chip);
|
|
stop_pipeline:
|
|
if (ret < 0)
|
|
snd_media_stop_pipeline(subs);
|
|
|
|
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;
|
|
struct snd_usb_audio *chip = subs->stream->chip;
|
|
|
|
snd_media_stop_pipeline(subs);
|
|
mutex_lock(&chip->mutex);
|
|
subs->cur_audiofmt = NULL;
|
|
mutex_unlock(&chip->mutex);
|
|
if (!snd_usb_lock_shutdown(chip)) {
|
|
if (stop_endpoints(subs, false))
|
|
sync_pending_stops(subs);
|
|
close_endpoints(chip, subs);
|
|
snd_usb_unlock_shutdown(chip);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* free-wheeling mode? (e.g. dmix) */
|
|
static int in_free_wheeling_mode(struct snd_pcm_runtime *runtime)
|
|
{
|
|
return runtime->stop_threshold > runtime->buffer_size;
|
|
}
|
|
|
|
/* check whether early start is needed for playback stream */
|
|
static int lowlatency_playback_available(struct snd_pcm_runtime *runtime,
|
|
struct snd_usb_substream *subs)
|
|
{
|
|
struct snd_usb_audio *chip = subs->stream->chip;
|
|
|
|
if (subs->direction == SNDRV_PCM_STREAM_CAPTURE)
|
|
return false;
|
|
/* disabled via module option? */
|
|
if (!chip->lowlatency)
|
|
return false;
|
|
if (in_free_wheeling_mode(runtime))
|
|
return false;
|
|
/* implicit feedback mode has own operation mode */
|
|
if (snd_usb_endpoint_implicit_feedback_sink(subs->data_endpoint))
|
|
return false;
|
|
return true;
|
|
}
|
|
|
|
/*
|
|
* 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 snd_usb_audio *chip = subs->stream->chip;
|
|
int ret;
|
|
|
|
ret = snd_usb_lock_shutdown(chip);
|
|
if (ret < 0)
|
|
return ret;
|
|
if (snd_BUG_ON(!subs->data_endpoint)) {
|
|
ret = -EIO;
|
|
goto unlock;
|
|
}
|
|
|
|
ret = configure_endpoints(chip, subs);
|
|
if (ret < 0)
|
|
goto unlock;
|
|
|
|
/* reset the pointer */
|
|
subs->buffer_bytes = frames_to_bytes(runtime, runtime->buffer_size);
|
|
subs->inflight_bytes = 0;
|
|
subs->hwptr_done = 0;
|
|
subs->transfer_done = 0;
|
|
subs->last_frame_number = 0;
|
|
subs->period_elapsed_pending = 0;
|
|
runtime->delay = 0;
|
|
|
|
subs->lowlatency_playback = lowlatency_playback_available(runtime, subs);
|
|
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
|
|
!subs->lowlatency_playback)
|
|
ret = start_endpoints(subs);
|
|
|
|
unlock:
|
|
snd_usb_unlock_shutdown(chip);
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* h/w constraints
|
|
*/
|
|
|
|
#ifdef HW_CONST_DEBUG
|
|
#define hwc_debug(fmt, args...) pr_debug(fmt, ##args)
|
|
#else
|
|
#define hwc_debug(fmt, args...) do { } while(0)
|
|
#endif
|
|
|
|
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,
|
|
.channels_min = 1,
|
|
.channels_max = 256,
|
|
.buffer_bytes_max = INT_MAX, /* limited by BUFFER_TIME later */
|
|
.period_bytes_min = 64,
|
|
.period_bytes_max = INT_MAX, /* limited by PERIOD_TIME later */
|
|
.periods_min = 2,
|
|
.periods_max = 1024,
|
|
};
|
|
|
|
static int hw_check_valid_format(struct snd_usb_substream *subs,
|
|
struct snd_pcm_hw_params *params,
|
|
const 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 0x%llx\n", fp->formats);
|
|
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 apply_hw_params_minmax(struct snd_interval *it, unsigned int rmin,
|
|
unsigned int rmax)
|
|
{
|
|
int changed;
|
|
|
|
if (rmin > rmax) {
|
|
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_rate(struct snd_pcm_hw_params *params,
|
|
struct snd_pcm_hw_rule *rule)
|
|
{
|
|
struct snd_usb_substream *subs = rule->private;
|
|
struct snd_usb_audio *chip = subs->stream->chip;
|
|
const struct audioformat *fp;
|
|
struct snd_interval *it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
|
|
unsigned int rmin, rmax, r;
|
|
int i;
|
|
|
|
hwc_debug("hw_rule_rate: (%d,%d)\n", it->min, it->max);
|
|
rmin = UINT_MAX;
|
|
rmax = 0;
|
|
list_for_each_entry(fp, &subs->fmt_list, list) {
|
|
if (!hw_check_valid_format(subs, params, fp))
|
|
continue;
|
|
r = snd_usb_endpoint_get_clock_rate(chip, fp->clock);
|
|
if (r > 0) {
|
|
if (!snd_interval_test(it, r))
|
|
continue;
|
|
rmin = min(rmin, r);
|
|
rmax = max(rmax, r);
|
|
continue;
|
|
}
|
|
if (fp->rate_table && fp->nr_rates) {
|
|
for (i = 0; i < fp->nr_rates; i++) {
|
|
r = fp->rate_table[i];
|
|
if (!snd_interval_test(it, r))
|
|
continue;
|
|
rmin = min(rmin, r);
|
|
rmax = max(rmax, r);
|
|
}
|
|
} else {
|
|
rmin = min(rmin, fp->rate_min);
|
|
rmax = max(rmax, fp->rate_max);
|
|
}
|
|
}
|
|
|
|
return apply_hw_params_minmax(it, rmin, rmax);
|
|
}
|
|
|
|
|
|
static int hw_rule_channels(struct snd_pcm_hw_params *params,
|
|
struct snd_pcm_hw_rule *rule)
|
|
{
|
|
struct snd_usb_substream *subs = rule->private;
|
|
const struct audioformat *fp;
|
|
struct snd_interval *it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
|
|
unsigned int rmin, rmax;
|
|
|
|
hwc_debug("hw_rule_channels: (%d,%d)\n", it->min, it->max);
|
|
rmin = UINT_MAX;
|
|
rmax = 0;
|
|
list_for_each_entry(fp, &subs->fmt_list, list) {
|
|
if (!hw_check_valid_format(subs, params, fp))
|
|
continue;
|
|
rmin = min(rmin, fp->channels);
|
|
rmax = max(rmax, fp->channels);
|
|
}
|
|
|
|
return apply_hw_params_minmax(it, rmin, rmax);
|
|
}
|
|
|
|
static int apply_hw_params_format_bits(struct snd_mask *fmt, u64 fbits)
|
|
{
|
|
u32 oldbits[2];
|
|
int changed;
|
|
|
|
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_format(struct snd_pcm_hw_params *params,
|
|
struct snd_pcm_hw_rule *rule)
|
|
{
|
|
struct snd_usb_substream *subs = rule->private;
|
|
const struct audioformat *fp;
|
|
struct snd_mask *fmt = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
|
|
u64 fbits;
|
|
|
|
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;
|
|
}
|
|
return apply_hw_params_format_bits(fmt, fbits);
|
|
}
|
|
|
|
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;
|
|
const struct audioformat *fp;
|
|
struct snd_interval *it;
|
|
unsigned char min_datainterval;
|
|
unsigned int pmin;
|
|
|
|
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);
|
|
|
|
return apply_hw_params_minmax(it, pmin, UINT_MAX);
|
|
}
|
|
|
|
/* get the EP or the sync EP for implicit fb when it's already set up */
|
|
static const struct snd_usb_endpoint *
|
|
get_sync_ep_from_substream(struct snd_usb_substream *subs)
|
|
{
|
|
struct snd_usb_audio *chip = subs->stream->chip;
|
|
const struct audioformat *fp;
|
|
const struct snd_usb_endpoint *ep;
|
|
|
|
list_for_each_entry(fp, &subs->fmt_list, list) {
|
|
ep = snd_usb_get_endpoint(chip, fp->endpoint);
|
|
if (ep && ep->cur_audiofmt) {
|
|
/* if EP is already opened solely for this substream,
|
|
* we still allow us to change the parameter; otherwise
|
|
* this substream has to follow the existing parameter
|
|
*/
|
|
if (ep->cur_audiofmt != subs->cur_audiofmt || ep->opened > 1)
|
|
return ep;
|
|
}
|
|
if (!fp->implicit_fb)
|
|
continue;
|
|
/* for the implicit fb, check the sync ep as well */
|
|
ep = snd_usb_get_endpoint(chip, fp->sync_ep);
|
|
if (ep && ep->cur_audiofmt)
|
|
return ep;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
/* additional hw constraints for implicit feedback mode */
|
|
static int hw_rule_format_implicit_fb(struct snd_pcm_hw_params *params,
|
|
struct snd_pcm_hw_rule *rule)
|
|
{
|
|
struct snd_usb_substream *subs = rule->private;
|
|
const struct snd_usb_endpoint *ep;
|
|
struct snd_mask *fmt = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
|
|
|
|
ep = get_sync_ep_from_substream(subs);
|
|
if (!ep)
|
|
return 0;
|
|
|
|
hwc_debug("applying %s\n", __func__);
|
|
return apply_hw_params_format_bits(fmt, pcm_format_to_bits(ep->cur_format));
|
|
}
|
|
|
|
static int hw_rule_rate_implicit_fb(struct snd_pcm_hw_params *params,
|
|
struct snd_pcm_hw_rule *rule)
|
|
{
|
|
struct snd_usb_substream *subs = rule->private;
|
|
const struct snd_usb_endpoint *ep;
|
|
struct snd_interval *it;
|
|
|
|
ep = get_sync_ep_from_substream(subs);
|
|
if (!ep)
|
|
return 0;
|
|
|
|
hwc_debug("applying %s\n", __func__);
|
|
it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
|
|
return apply_hw_params_minmax(it, ep->cur_rate, ep->cur_rate);
|
|
}
|
|
|
|
static int hw_rule_period_size_implicit_fb(struct snd_pcm_hw_params *params,
|
|
struct snd_pcm_hw_rule *rule)
|
|
{
|
|
struct snd_usb_substream *subs = rule->private;
|
|
const struct snd_usb_endpoint *ep;
|
|
struct snd_interval *it;
|
|
|
|
ep = get_sync_ep_from_substream(subs);
|
|
if (!ep)
|
|
return 0;
|
|
|
|
hwc_debug("applying %s\n", __func__);
|
|
it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE);
|
|
return apply_hw_params_minmax(it, ep->cur_period_frames,
|
|
ep->cur_period_frames);
|
|
}
|
|
|
|
static int hw_rule_periods_implicit_fb(struct snd_pcm_hw_params *params,
|
|
struct snd_pcm_hw_rule *rule)
|
|
{
|
|
struct snd_usb_substream *subs = rule->private;
|
|
const struct snd_usb_endpoint *ep;
|
|
struct snd_interval *it;
|
|
|
|
ep = get_sync_ep_from_substream(subs);
|
|
if (!ep)
|
|
return 0;
|
|
|
|
hwc_debug("applying %s\n", __func__);
|
|
it = hw_param_interval(params, SNDRV_PCM_HW_PARAM_PERIODS);
|
|
return apply_hw_params_minmax(it, ep->cur_buffer_periods,
|
|
ep->cur_buffer_periods);
|
|
}
|
|
|
|
/*
|
|
* set up the runtime hardware information.
|
|
*/
|
|
|
|
static int setup_hw_info(struct snd_pcm_runtime *runtime, struct snd_usb_substream *subs)
|
|
{
|
|
const struct audioformat *fp;
|
|
unsigned int pt, ptmin;
|
|
int param_period_time_if_needed = -1;
|
|
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_RATE,
|
|
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_CHANNELS,
|
|
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_FORMAT,
|
|
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;
|
|
}
|
|
|
|
/* set max period and buffer sizes for 1 and 2 seconds, respectively */
|
|
err = snd_pcm_hw_constraint_minmax(runtime,
|
|
SNDRV_PCM_HW_PARAM_PERIOD_TIME,
|
|
0, 1000000);
|
|
if (err < 0)
|
|
return err;
|
|
err = snd_pcm_hw_constraint_minmax(runtime,
|
|
SNDRV_PCM_HW_PARAM_BUFFER_TIME,
|
|
0, 2000000);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
/* additional hw constraints for implicit fb */
|
|
err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_FORMAT,
|
|
hw_rule_format_implicit_fb, subs,
|
|
SNDRV_PCM_HW_PARAM_FORMAT, -1);
|
|
if (err < 0)
|
|
return err;
|
|
err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
|
|
hw_rule_rate_implicit_fb, subs,
|
|
SNDRV_PCM_HW_PARAM_RATE, -1);
|
|
if (err < 0)
|
|
return err;
|
|
err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
|
|
hw_rule_period_size_implicit_fb, subs,
|
|
SNDRV_PCM_HW_PARAM_PERIOD_SIZE, -1);
|
|
if (err < 0)
|
|
return err;
|
|
err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_PERIODS,
|
|
hw_rule_periods_implicit_fb, subs,
|
|
SNDRV_PCM_HW_PARAM_PERIODS, -1);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
list_for_each_entry(fp, &subs->fmt_list, list) {
|
|
if (fp->implicit_fb) {
|
|
runtime->hw.info |= SNDRV_PCM_INFO_JOINT_DUPLEX;
|
|
break;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
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];
|
|
int ret;
|
|
|
|
runtime->hw = snd_usb_hardware;
|
|
/* need an explicit sync to catch applptr update in low-latency mode */
|
|
if (direction == SNDRV_PCM_STREAM_PLAYBACK &&
|
|
as->chip->lowlatency)
|
|
runtime->hw.info |= SNDRV_PCM_INFO_SYNC_APPLPTR;
|
|
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;
|
|
|
|
ret = setup_hw_info(runtime, subs);
|
|
if (ret < 0)
|
|
return ret;
|
|
ret = snd_usb_autoresume(subs->stream->chip);
|
|
if (ret < 0)
|
|
return ret;
|
|
ret = snd_media_stream_init(subs, as->pcm, direction);
|
|
if (ret < 0)
|
|
snd_usb_autosuspend(subs->stream->chip);
|
|
return ret;
|
|
}
|
|
|
|
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;
|
|
|
|
snd_media_stop_pipeline(subs);
|
|
|
|
if (!snd_usb_lock_shutdown(subs->stream->chip)) {
|
|
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;
|
|
if (subs->stream_offset_adj > 0) {
|
|
unsigned int adj = min(subs->stream_offset_adj, bytes);
|
|
cp += adj;
|
|
bytes -= adj;
|
|
subs->stream_offset_adj -= adj;
|
|
}
|
|
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 >= subs->buffer_bytes)
|
|
subs->hwptr_done -= subs->buffer_bytes;
|
|
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;
|
|
}
|
|
|
|
/* realign last_frame_number */
|
|
subs->last_frame_number = current_frame_number;
|
|
|
|
spin_unlock_irqrestore(&subs->lock, flags);
|
|
/* copy a data chunk */
|
|
if (oldptr + bytes > subs->buffer_bytes) {
|
|
unsigned int bytes1 = subs->buffer_bytes - oldptr;
|
|
|
|
memcpy(runtime->dma_area + oldptr, cp, bytes1);
|
|
memcpy(runtime->dma_area, cp + bytes1, bytes - bytes1);
|
|
} else {
|
|
memcpy(runtime->dma_area + oldptr, cp, bytes);
|
|
}
|
|
}
|
|
|
|
if (period_elapsed)
|
|
snd_pcm_period_elapsed(subs->pcm_substream);
|
|
}
|
|
|
|
static void urb_ctx_queue_advance(struct snd_usb_substream *subs,
|
|
struct urb *urb, unsigned int bytes)
|
|
{
|
|
struct snd_urb_ctx *ctx = urb->context;
|
|
|
|
ctx->queued += bytes;
|
|
subs->inflight_bytes += bytes;
|
|
subs->hwptr_done += bytes;
|
|
if (subs->hwptr_done >= subs->buffer_bytes)
|
|
subs->hwptr_done -= subs->buffer_bytes;
|
|
}
|
|
|
|
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 dst_idx = 0;
|
|
unsigned int src_idx = subs->hwptr_done;
|
|
unsigned int wrap = subs->buffer_bytes;
|
|
u8 *dst = urb->transfer_buffer;
|
|
u8 *src = runtime->dma_area;
|
|
static const u8 marker[] = { 0x05, 0xfa };
|
|
unsigned int queued = 0;
|
|
|
|
/*
|
|
* 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];
|
|
queued++;
|
|
}
|
|
}
|
|
|
|
urb_ctx_queue_advance(subs, urb, queued);
|
|
}
|
|
|
|
/* copy bit-reversed bytes onto transfer buffer */
|
|
static void fill_playback_urb_dsd_bitrev(struct snd_usb_substream *subs,
|
|
struct urb *urb, unsigned int bytes)
|
|
{
|
|
struct snd_pcm_runtime *runtime = subs->pcm_substream->runtime;
|
|
const u8 *src = runtime->dma_area;
|
|
u8 *buf = urb->transfer_buffer;
|
|
int i, ofs = subs->hwptr_done;
|
|
|
|
for (i = 0; i < bytes; i++) {
|
|
*buf++ = bitrev8(src[ofs]);
|
|
if (++ofs >= subs->buffer_bytes)
|
|
ofs = 0;
|
|
}
|
|
|
|
urb_ctx_queue_advance(subs, urb, bytes);
|
|
}
|
|
|
|
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 > subs->buffer_bytes) {
|
|
/* err, the transferred area goes over buffer boundary. */
|
|
unsigned int bytes1 = subs->buffer_bytes - 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);
|
|
}
|
|
|
|
urb_ctx_queue_advance(subs, urb, bytes);
|
|
}
|
|
|
|
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 int prepare_playback_urb(struct snd_usb_substream *subs,
|
|
struct urb *urb,
|
|
bool in_stream_lock)
|
|
{
|
|
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 frames, bytes;
|
|
int counts;
|
|
unsigned int transfer_done, frame_limit, avail = 0;
|
|
int i, stride, period_elapsed = 0;
|
|
unsigned long flags;
|
|
int err = 0;
|
|
|
|
stride = ep->stride;
|
|
|
|
frames = 0;
|
|
ctx->queued = 0;
|
|
urb->number_of_packets = 0;
|
|
|
|
spin_lock_irqsave(&subs->lock, flags);
|
|
frame_limit = subs->frame_limit + ep->max_urb_frames;
|
|
transfer_done = subs->transfer_done;
|
|
|
|
if (subs->lowlatency_playback &&
|
|
runtime->status->state != SNDRV_PCM_STATE_DRAINING) {
|
|
unsigned int hwptr = subs->hwptr_done / stride;
|
|
|
|
/* calculate the byte offset-in-buffer of the appl_ptr */
|
|
avail = (runtime->control->appl_ptr - runtime->hw_ptr_base)
|
|
% runtime->buffer_size;
|
|
if (avail <= hwptr)
|
|
avail += runtime->buffer_size;
|
|
avail -= hwptr;
|
|
}
|
|
|
|
for (i = 0; i < ctx->packets; i++) {
|
|
counts = snd_usb_endpoint_next_packet_size(ep, ctx, i, avail);
|
|
if (counts < 0)
|
|
break;
|
|
/* set up descriptor */
|
|
urb->iso_frame_desc[i].offset = frames * stride;
|
|
urb->iso_frame_desc[i].length = counts * stride;
|
|
frames += counts;
|
|
avail -= counts;
|
|
urb->number_of_packets++;
|
|
transfer_done += counts;
|
|
if (transfer_done >= runtime->period_size) {
|
|
transfer_done -= runtime->period_size;
|
|
frame_limit = 0;
|
|
period_elapsed = 1;
|
|
if (subs->fmt_type == UAC_FORMAT_TYPE_II) {
|
|
if (transfer_done > 0) {
|
|
/* FIXME: fill-max mode is not
|
|
* supported yet */
|
|
frames -= transfer_done;
|
|
counts -= transfer_done;
|
|
urb->iso_frame_desc[i].length =
|
|
counts * stride;
|
|
transfer_done = 0;
|
|
}
|
|
i++;
|
|
if (i < ctx->packets) {
|
|
/* add a transfer delimiter */
|
|
urb->iso_frame_desc[i].offset =
|
|
frames * stride;
|
|
urb->iso_frame_desc[i].length = 0;
|
|
urb->number_of_packets++;
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
/* finish at the period boundary or after enough frames */
|
|
if ((period_elapsed || transfer_done >= frame_limit) &&
|
|
!snd_usb_endpoint_implicit_feedback_sink(ep))
|
|
break;
|
|
}
|
|
|
|
if (!frames) {
|
|
err = -EAGAIN;
|
|
goto unlock;
|
|
}
|
|
|
|
bytes = frames * stride;
|
|
subs->transfer_done = transfer_done;
|
|
subs->frame_limit = frame_limit;
|
|
if (unlikely(ep->cur_format == SNDRV_PCM_FORMAT_DSD_U16_LE &&
|
|
subs->cur_audiofmt->dsd_dop)) {
|
|
fill_playback_urb_dsd_dop(subs, urb, bytes);
|
|
} else if (unlikely(ep->cur_format == SNDRV_PCM_FORMAT_DSD_U8 &&
|
|
subs->cur_audiofmt->dsd_bitrev)) {
|
|
fill_playback_urb_dsd_bitrev(subs, urb, bytes);
|
|
} 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 */
|
|
}
|
|
|
|
subs->last_frame_number = usb_get_current_frame_number(subs->dev);
|
|
|
|
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;
|
|
}
|
|
|
|
if (period_elapsed && !subs->running && subs->lowlatency_playback) {
|
|
subs->period_elapsed_pending = 1;
|
|
period_elapsed = 0;
|
|
}
|
|
|
|
unlock:
|
|
spin_unlock_irqrestore(&subs->lock, flags);
|
|
if (err < 0)
|
|
return err;
|
|
urb->transfer_buffer_length = bytes;
|
|
if (period_elapsed) {
|
|
if (in_stream_lock)
|
|
snd_pcm_period_elapsed_under_stream_lock(subs->pcm_substream);
|
|
else
|
|
snd_pcm_period_elapsed(subs->pcm_substream);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* 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_urb_ctx *ctx = urb->context;
|
|
bool period_elapsed = false;
|
|
|
|
spin_lock_irqsave(&subs->lock, flags);
|
|
if (ctx->queued) {
|
|
if (subs->inflight_bytes >= ctx->queued)
|
|
subs->inflight_bytes -= ctx->queued;
|
|
else
|
|
subs->inflight_bytes = 0;
|
|
}
|
|
|
|
subs->last_frame_number = usb_get_current_frame_number(subs->dev);
|
|
if (subs->running) {
|
|
period_elapsed = subs->period_elapsed_pending;
|
|
subs->period_elapsed_pending = 0;
|
|
}
|
|
spin_unlock_irqrestore(&subs->lock, flags);
|
|
if (period_elapsed)
|
|
snd_pcm_period_elapsed(subs->pcm_substream);
|
|
}
|
|
|
|
/* PCM ack callback for the playback stream;
|
|
* this plays a role only when the stream is running in low-latency mode.
|
|
*/
|
|
static int snd_usb_pcm_playback_ack(struct snd_pcm_substream *substream)
|
|
{
|
|
struct snd_usb_substream *subs = substream->runtime->private_data;
|
|
struct snd_usb_endpoint *ep;
|
|
|
|
if (!subs->lowlatency_playback || !subs->running)
|
|
return 0;
|
|
ep = subs->data_endpoint;
|
|
if (!ep)
|
|
return 0;
|
|
/* When no more in-flight URBs available, try to process the pending
|
|
* outputs here
|
|
*/
|
|
if (!ep->active_mask)
|
|
snd_usb_queue_pending_output_urbs(ep, true);
|
|
return 0;
|
|
}
|
|
|
|
static int snd_usb_substream_playback_trigger(struct snd_pcm_substream *substream,
|
|
int cmd)
|
|
{
|
|
struct snd_usb_substream *subs = substream->runtime->private_data;
|
|
int err;
|
|
|
|
switch (cmd) {
|
|
case SNDRV_PCM_TRIGGER_START:
|
|
subs->trigger_tstamp_pending_update = true;
|
|
fallthrough;
|
|
case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
|
|
snd_usb_endpoint_set_callback(subs->data_endpoint,
|
|
prepare_playback_urb,
|
|
retire_playback_urb,
|
|
subs);
|
|
if (subs->lowlatency_playback &&
|
|
cmd == SNDRV_PCM_TRIGGER_START) {
|
|
if (in_free_wheeling_mode(substream->runtime))
|
|
subs->lowlatency_playback = false;
|
|
err = start_endpoints(subs);
|
|
if (err < 0) {
|
|
snd_usb_endpoint_set_callback(subs->data_endpoint,
|
|
NULL, NULL, NULL);
|
|
return err;
|
|
}
|
|
}
|
|
subs->running = 1;
|
|
dev_dbg(&subs->dev->dev, "%d:%d Start Playback PCM\n",
|
|
subs->cur_audiofmt->iface,
|
|
subs->cur_audiofmt->altsetting);
|
|
return 0;
|
|
case SNDRV_PCM_TRIGGER_SUSPEND:
|
|
case SNDRV_PCM_TRIGGER_STOP:
|
|
stop_endpoints(subs, substream->runtime->status->state == SNDRV_PCM_STATE_DRAINING);
|
|
snd_usb_endpoint_set_callback(subs->data_endpoint,
|
|
NULL, NULL, NULL);
|
|
subs->running = 0;
|
|
dev_dbg(&subs->dev->dev, "%d:%d Stop Playback PCM\n",
|
|
subs->cur_audiofmt->iface,
|
|
subs->cur_audiofmt->altsetting);
|
|
return 0;
|
|
case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
|
|
/* keep retire_data_urb for delay calculation */
|
|
snd_usb_endpoint_set_callback(subs->data_endpoint,
|
|
NULL,
|
|
retire_playback_urb,
|
|
subs);
|
|
subs->running = 0;
|
|
dev_dbg(&subs->dev->dev, "%d:%d Pause Playback PCM\n",
|
|
subs->cur_audiofmt->iface,
|
|
subs->cur_audiofmt->altsetting);
|
|
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;
|
|
fallthrough;
|
|
case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
|
|
snd_usb_endpoint_set_callback(subs->data_endpoint,
|
|
NULL, retire_capture_urb,
|
|
subs);
|
|
subs->last_frame_number = usb_get_current_frame_number(subs->dev);
|
|
subs->running = 1;
|
|
dev_dbg(&subs->dev->dev, "%d:%d Start Capture PCM\n",
|
|
subs->cur_audiofmt->iface,
|
|
subs->cur_audiofmt->altsetting);
|
|
return 0;
|
|
case SNDRV_PCM_TRIGGER_SUSPEND:
|
|
case SNDRV_PCM_TRIGGER_STOP:
|
|
stop_endpoints(subs, false);
|
|
fallthrough;
|
|
case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
|
|
snd_usb_endpoint_set_callback(subs->data_endpoint,
|
|
NULL, NULL, NULL);
|
|
subs->running = 0;
|
|
dev_dbg(&subs->dev->dev, "%d:%d Stop Capture PCM\n",
|
|
subs->cur_audiofmt->iface,
|
|
subs->cur_audiofmt->altsetting);
|
|
return 0;
|
|
}
|
|
|
|
return -EINVAL;
|
|
}
|
|
|
|
static const struct snd_pcm_ops snd_usb_playback_ops = {
|
|
.open = snd_usb_pcm_open,
|
|
.close = snd_usb_pcm_close,
|
|
.hw_params = snd_usb_hw_params,
|
|
.hw_free = snd_usb_hw_free,
|
|
.prepare = snd_usb_pcm_prepare,
|
|
.trigger = snd_usb_substream_playback_trigger,
|
|
.sync_stop = snd_usb_pcm_sync_stop,
|
|
.pointer = snd_usb_pcm_pointer,
|
|
.ack = snd_usb_pcm_playback_ack,
|
|
};
|
|
|
|
static const struct snd_pcm_ops snd_usb_capture_ops = {
|
|
.open = snd_usb_pcm_open,
|
|
.close = snd_usb_pcm_close,
|
|
.hw_params = snd_usb_hw_params,
|
|
.hw_free = snd_usb_hw_free,
|
|
.prepare = snd_usb_pcm_prepare,
|
|
.trigger = snd_usb_substream_capture_trigger,
|
|
.sync_stop = snd_usb_pcm_sync_stop,
|
|
.pointer = snd_usb_pcm_pointer,
|
|
};
|
|
|
|
void snd_usb_set_pcm_ops(struct snd_pcm *pcm, int stream)
|
|
{
|
|
const struct snd_pcm_ops *ops;
|
|
|
|
ops = stream == SNDRV_PCM_STREAM_PLAYBACK ?
|
|
&snd_usb_playback_ops : &snd_usb_capture_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->sysdev;
|
|
|
|
if (snd_usb_use_vmalloc)
|
|
snd_pcm_set_managed_buffer(s, SNDRV_DMA_TYPE_VMALLOC,
|
|
NULL, 0, 0);
|
|
else
|
|
snd_pcm_set_managed_buffer(s, SNDRV_DMA_TYPE_DEV_SG,
|
|
dev, 64*1024, 512*1024);
|
|
}
|