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![Wenwen Wang](/assets/img/avatar_default.png)
In snd_usb_get_audioformat_uac3(), a structure for channel maps 'chmap' is
allocated through kzalloc() before the execution goto 'found_clock'.
However, this structure is not deallocated if the memory allocation for
'pd' fails, leading to a memory leak bug.
To fix the above issue, free 'fp->chmap' before returning NULL.
Fixes: 7edf3b5e6a
("ALSA: usb-audio: AudioStreaming Power Domain parsing")
Signed-off-by: Wenwen Wang <wenwen@cs.uga.edu>
Cc: <stable@vger.kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
1202 lines
31 KiB
C
1202 lines
31 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/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 <linux/usb/audio-v3.h>
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#include <sound/core.h>
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#include <sound/pcm.h>
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#include <sound/control.h>
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#include <sound/tlv.h>
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#include "usbaudio.h"
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#include "card.h"
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#include "proc.h"
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#include "quirks.h"
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#include "endpoint.h"
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#include "pcm.h"
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#include "helper.h"
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#include "format.h"
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#include "clock.h"
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#include "stream.h"
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#include "power.h"
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#include "media.h"
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/*
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* free a substream
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*/
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static void free_substream(struct snd_usb_substream *subs)
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{
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struct audioformat *fp, *n;
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if (!subs->num_formats)
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return; /* not initialized */
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list_for_each_entry_safe(fp, n, &subs->fmt_list, list) {
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kfree(fp->rate_table);
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kfree(fp->chmap);
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kfree(fp);
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}
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kfree(subs->rate_list.list);
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kfree(subs->str_pd);
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snd_media_stream_delete(subs);
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}
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/*
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* free a usb stream instance
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*/
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static void snd_usb_audio_stream_free(struct snd_usb_stream *stream)
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{
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free_substream(&stream->substream[0]);
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free_substream(&stream->substream[1]);
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list_del(&stream->list);
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kfree(stream);
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}
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static void snd_usb_audio_pcm_free(struct snd_pcm *pcm)
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{
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struct snd_usb_stream *stream = pcm->private_data;
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if (stream) {
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stream->pcm = NULL;
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snd_usb_audio_stream_free(stream);
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}
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}
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/*
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* initialize the substream instance.
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*/
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static void snd_usb_init_substream(struct snd_usb_stream *as,
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int stream,
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struct audioformat *fp,
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struct snd_usb_power_domain *pd)
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{
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struct snd_usb_substream *subs = &as->substream[stream];
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INIT_LIST_HEAD(&subs->fmt_list);
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spin_lock_init(&subs->lock);
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subs->stream = as;
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subs->direction = stream;
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subs->dev = as->chip->dev;
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subs->txfr_quirk = as->chip->txfr_quirk;
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subs->tx_length_quirk = as->chip->tx_length_quirk;
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subs->speed = snd_usb_get_speed(subs->dev);
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subs->pkt_offset_adj = 0;
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snd_usb_set_pcm_ops(as->pcm, stream);
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list_add_tail(&fp->list, &subs->fmt_list);
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subs->formats |= fp->formats;
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subs->num_formats++;
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subs->fmt_type = fp->fmt_type;
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subs->ep_num = fp->endpoint;
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if (fp->channels > subs->channels_max)
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subs->channels_max = fp->channels;
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if (pd) {
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subs->str_pd = pd;
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/* Initialize Power Domain to idle status D1 */
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snd_usb_power_domain_set(subs->stream->chip, pd,
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UAC3_PD_STATE_D1);
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}
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snd_usb_preallocate_buffer(subs);
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}
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/* kctl callbacks for usb-audio channel maps */
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static int usb_chmap_ctl_info(struct snd_kcontrol *kcontrol,
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struct snd_ctl_elem_info *uinfo)
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{
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struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol);
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struct snd_usb_substream *subs = info->private_data;
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uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
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uinfo->count = subs->channels_max;
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uinfo->value.integer.min = 0;
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uinfo->value.integer.max = SNDRV_CHMAP_LAST;
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return 0;
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}
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/* check whether a duplicated entry exists in the audiofmt list */
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static bool have_dup_chmap(struct snd_usb_substream *subs,
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struct audioformat *fp)
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{
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struct audioformat *prev = fp;
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list_for_each_entry_continue_reverse(prev, &subs->fmt_list, list) {
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if (prev->chmap &&
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!memcmp(prev->chmap, fp->chmap, sizeof(*fp->chmap)))
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return true;
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}
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return false;
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}
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static int usb_chmap_ctl_tlv(struct snd_kcontrol *kcontrol, int op_flag,
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unsigned int size, unsigned int __user *tlv)
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{
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struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol);
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struct snd_usb_substream *subs = info->private_data;
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struct audioformat *fp;
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unsigned int __user *dst;
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int count = 0;
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if (size < 8)
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return -ENOMEM;
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if (put_user(SNDRV_CTL_TLVT_CONTAINER, tlv))
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return -EFAULT;
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size -= 8;
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dst = tlv + 2;
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list_for_each_entry(fp, &subs->fmt_list, list) {
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int i, ch_bytes;
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if (!fp->chmap)
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continue;
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if (have_dup_chmap(subs, fp))
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continue;
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/* copy the entry */
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ch_bytes = fp->chmap->channels * 4;
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if (size < 8 + ch_bytes)
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return -ENOMEM;
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if (put_user(SNDRV_CTL_TLVT_CHMAP_FIXED, dst) ||
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put_user(ch_bytes, dst + 1))
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return -EFAULT;
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dst += 2;
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for (i = 0; i < fp->chmap->channels; i++, dst++) {
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if (put_user(fp->chmap->map[i], dst))
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return -EFAULT;
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}
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count += 8 + ch_bytes;
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size -= 8 + ch_bytes;
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}
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if (put_user(count, tlv + 1))
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return -EFAULT;
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return 0;
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}
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static int usb_chmap_ctl_get(struct snd_kcontrol *kcontrol,
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struct snd_ctl_elem_value *ucontrol)
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{
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struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol);
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struct snd_usb_substream *subs = info->private_data;
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struct snd_pcm_chmap_elem *chmap = NULL;
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int i;
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memset(ucontrol->value.integer.value, 0,
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sizeof(ucontrol->value.integer.value));
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if (subs->cur_audiofmt)
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chmap = subs->cur_audiofmt->chmap;
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if (chmap) {
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for (i = 0; i < chmap->channels; i++)
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ucontrol->value.integer.value[i] = chmap->map[i];
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}
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return 0;
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}
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/* create a chmap kctl assigned to the given USB substream */
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static int add_chmap(struct snd_pcm *pcm, int stream,
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struct snd_usb_substream *subs)
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{
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struct audioformat *fp;
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struct snd_pcm_chmap *chmap;
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struct snd_kcontrol *kctl;
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int err;
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list_for_each_entry(fp, &subs->fmt_list, list)
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if (fp->chmap)
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goto ok;
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/* no chmap is found */
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return 0;
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ok:
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err = snd_pcm_add_chmap_ctls(pcm, stream, NULL, 0, 0, &chmap);
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if (err < 0)
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return err;
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/* override handlers */
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chmap->private_data = subs;
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kctl = chmap->kctl;
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kctl->info = usb_chmap_ctl_info;
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kctl->get = usb_chmap_ctl_get;
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kctl->tlv.c = usb_chmap_ctl_tlv;
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return 0;
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}
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/* convert from USB ChannelConfig bits to ALSA chmap element */
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static struct snd_pcm_chmap_elem *convert_chmap(int channels, unsigned int bits,
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int protocol)
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{
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static unsigned int uac1_maps[] = {
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SNDRV_CHMAP_FL, /* left front */
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SNDRV_CHMAP_FR, /* right front */
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SNDRV_CHMAP_FC, /* center front */
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SNDRV_CHMAP_LFE, /* LFE */
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SNDRV_CHMAP_SL, /* left surround */
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SNDRV_CHMAP_SR, /* right surround */
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SNDRV_CHMAP_FLC, /* left of center */
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SNDRV_CHMAP_FRC, /* right of center */
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SNDRV_CHMAP_RC, /* surround */
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SNDRV_CHMAP_SL, /* side left */
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SNDRV_CHMAP_SR, /* side right */
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SNDRV_CHMAP_TC, /* top */
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0 /* terminator */
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};
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static unsigned int uac2_maps[] = {
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SNDRV_CHMAP_FL, /* front left */
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SNDRV_CHMAP_FR, /* front right */
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SNDRV_CHMAP_FC, /* front center */
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SNDRV_CHMAP_LFE, /* LFE */
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SNDRV_CHMAP_RL, /* back left */
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SNDRV_CHMAP_RR, /* back right */
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SNDRV_CHMAP_FLC, /* front left of center */
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SNDRV_CHMAP_FRC, /* front right of center */
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SNDRV_CHMAP_RC, /* back center */
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SNDRV_CHMAP_SL, /* side left */
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SNDRV_CHMAP_SR, /* side right */
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SNDRV_CHMAP_TC, /* top center */
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SNDRV_CHMAP_TFL, /* top front left */
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SNDRV_CHMAP_TFC, /* top front center */
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SNDRV_CHMAP_TFR, /* top front right */
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SNDRV_CHMAP_TRL, /* top back left */
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SNDRV_CHMAP_TRC, /* top back center */
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SNDRV_CHMAP_TRR, /* top back right */
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SNDRV_CHMAP_TFLC, /* top front left of center */
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SNDRV_CHMAP_TFRC, /* top front right of center */
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SNDRV_CHMAP_LLFE, /* left LFE */
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SNDRV_CHMAP_RLFE, /* right LFE */
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SNDRV_CHMAP_TSL, /* top side left */
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SNDRV_CHMAP_TSR, /* top side right */
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SNDRV_CHMAP_BC, /* bottom center */
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SNDRV_CHMAP_RLC, /* back left of center */
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SNDRV_CHMAP_RRC, /* back right of center */
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0 /* terminator */
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};
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struct snd_pcm_chmap_elem *chmap;
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const unsigned int *maps;
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int c;
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if (channels > ARRAY_SIZE(chmap->map))
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return NULL;
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chmap = kzalloc(sizeof(*chmap), GFP_KERNEL);
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if (!chmap)
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return NULL;
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maps = protocol == UAC_VERSION_2 ? uac2_maps : uac1_maps;
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chmap->channels = channels;
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c = 0;
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if (bits) {
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for (; bits && *maps; maps++, bits >>= 1)
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if (bits & 1)
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chmap->map[c++] = *maps;
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} else {
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/* If we're missing wChannelConfig, then guess something
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to make sure the channel map is not skipped entirely */
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if (channels == 1)
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chmap->map[c++] = SNDRV_CHMAP_MONO;
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else
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for (; c < channels && *maps; maps++)
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chmap->map[c++] = *maps;
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}
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for (; c < channels; c++)
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chmap->map[c] = SNDRV_CHMAP_UNKNOWN;
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return chmap;
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}
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/* UAC3 device stores channels information in Cluster Descriptors */
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static struct
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snd_pcm_chmap_elem *convert_chmap_v3(struct uac3_cluster_header_descriptor
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*cluster)
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{
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unsigned int channels = cluster->bNrChannels;
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struct snd_pcm_chmap_elem *chmap;
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void *p = cluster;
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int len, c;
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if (channels > ARRAY_SIZE(chmap->map))
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return NULL;
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chmap = kzalloc(sizeof(*chmap), GFP_KERNEL);
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if (!chmap)
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return NULL;
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len = le16_to_cpu(cluster->wLength);
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c = 0;
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p += sizeof(struct uac3_cluster_header_descriptor);
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while (((p - (void *)cluster) < len) && (c < channels)) {
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struct uac3_cluster_segment_descriptor *cs_desc = p;
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u16 cs_len;
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u8 cs_type;
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cs_len = le16_to_cpu(cs_desc->wLength);
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cs_type = cs_desc->bSegmentType;
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if (cs_type == UAC3_CHANNEL_INFORMATION) {
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struct uac3_cluster_information_segment_descriptor *is = p;
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unsigned char map;
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/*
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* TODO: this conversion is not complete, update it
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* after adding UAC3 values to asound.h
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*/
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switch (is->bChRelationship) {
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case UAC3_CH_MONO:
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map = SNDRV_CHMAP_MONO;
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break;
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case UAC3_CH_LEFT:
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case UAC3_CH_FRONT_LEFT:
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case UAC3_CH_HEADPHONE_LEFT:
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map = SNDRV_CHMAP_FL;
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break;
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case UAC3_CH_RIGHT:
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case UAC3_CH_FRONT_RIGHT:
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case UAC3_CH_HEADPHONE_RIGHT:
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map = SNDRV_CHMAP_FR;
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break;
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case UAC3_CH_FRONT_CENTER:
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map = SNDRV_CHMAP_FC;
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break;
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case UAC3_CH_FRONT_LEFT_OF_CENTER:
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map = SNDRV_CHMAP_FLC;
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break;
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case UAC3_CH_FRONT_RIGHT_OF_CENTER:
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map = SNDRV_CHMAP_FRC;
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break;
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case UAC3_CH_SIDE_LEFT:
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map = SNDRV_CHMAP_SL;
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break;
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case UAC3_CH_SIDE_RIGHT:
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map = SNDRV_CHMAP_SR;
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break;
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case UAC3_CH_BACK_LEFT:
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map = SNDRV_CHMAP_RL;
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break;
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case UAC3_CH_BACK_RIGHT:
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map = SNDRV_CHMAP_RR;
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break;
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case UAC3_CH_BACK_CENTER:
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map = SNDRV_CHMAP_RC;
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break;
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case UAC3_CH_BACK_LEFT_OF_CENTER:
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map = SNDRV_CHMAP_RLC;
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break;
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case UAC3_CH_BACK_RIGHT_OF_CENTER:
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map = SNDRV_CHMAP_RRC;
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break;
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case UAC3_CH_TOP_CENTER:
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map = SNDRV_CHMAP_TC;
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break;
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case UAC3_CH_TOP_FRONT_LEFT:
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map = SNDRV_CHMAP_TFL;
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break;
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case UAC3_CH_TOP_FRONT_RIGHT:
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map = SNDRV_CHMAP_TFR;
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break;
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case UAC3_CH_TOP_FRONT_CENTER:
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map = SNDRV_CHMAP_TFC;
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break;
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case UAC3_CH_TOP_FRONT_LOC:
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map = SNDRV_CHMAP_TFLC;
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break;
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case UAC3_CH_TOP_FRONT_ROC:
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map = SNDRV_CHMAP_TFRC;
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break;
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case UAC3_CH_TOP_SIDE_LEFT:
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map = SNDRV_CHMAP_TSL;
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break;
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case UAC3_CH_TOP_SIDE_RIGHT:
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map = SNDRV_CHMAP_TSR;
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break;
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case UAC3_CH_TOP_BACK_LEFT:
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map = SNDRV_CHMAP_TRL;
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break;
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case UAC3_CH_TOP_BACK_RIGHT:
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map = SNDRV_CHMAP_TRR;
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break;
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case UAC3_CH_TOP_BACK_CENTER:
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map = SNDRV_CHMAP_TRC;
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break;
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case UAC3_CH_BOTTOM_CENTER:
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map = SNDRV_CHMAP_BC;
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break;
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case UAC3_CH_LOW_FREQUENCY_EFFECTS:
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map = SNDRV_CHMAP_LFE;
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break;
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case UAC3_CH_LFE_LEFT:
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map = SNDRV_CHMAP_LLFE;
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break;
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case UAC3_CH_LFE_RIGHT:
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map = SNDRV_CHMAP_RLFE;
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break;
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case UAC3_CH_RELATIONSHIP_UNDEFINED:
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default:
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map = SNDRV_CHMAP_UNKNOWN;
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break;
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}
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chmap->map[c++] = map;
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}
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p += cs_len;
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}
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if (channels < c)
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pr_err("%s: channel number mismatch\n", __func__);
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chmap->channels = channels;
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for (; c < channels; c++)
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chmap->map[c] = SNDRV_CHMAP_UNKNOWN;
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return chmap;
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}
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|
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/*
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* add this endpoint to the chip instance.
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* if a stream with the same endpoint already exists, append to it.
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* if not, create a new pcm stream. note, fp is added to the substream
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* fmt_list and will be freed on the chip instance release. do not free
|
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* fp or do remove it from the substream fmt_list to avoid double-free.
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*/
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static int __snd_usb_add_audio_stream(struct snd_usb_audio *chip,
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int stream,
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struct audioformat *fp,
|
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struct snd_usb_power_domain *pd)
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|
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{
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struct snd_usb_stream *as;
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struct snd_usb_substream *subs;
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struct snd_pcm *pcm;
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int err;
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|
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list_for_each_entry(as, &chip->pcm_list, list) {
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if (as->fmt_type != fp->fmt_type)
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continue;
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subs = &as->substream[stream];
|
|
if (subs->ep_num == fp->endpoint) {
|
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list_add_tail(&fp->list, &subs->fmt_list);
|
|
subs->num_formats++;
|
|
subs->formats |= fp->formats;
|
|
return 0;
|
|
}
|
|
}
|
|
/* look for an empty stream */
|
|
list_for_each_entry(as, &chip->pcm_list, list) {
|
|
if (as->fmt_type != fp->fmt_type)
|
|
continue;
|
|
subs = &as->substream[stream];
|
|
if (subs->ep_num)
|
|
continue;
|
|
err = snd_pcm_new_stream(as->pcm, stream, 1);
|
|
if (err < 0)
|
|
return err;
|
|
snd_usb_init_substream(as, stream, fp, pd);
|
|
return add_chmap(as->pcm, stream, subs);
|
|
}
|
|
|
|
/* create a new pcm */
|
|
as = kzalloc(sizeof(*as), GFP_KERNEL);
|
|
if (!as)
|
|
return -ENOMEM;
|
|
as->pcm_index = chip->pcm_devs;
|
|
as->chip = chip;
|
|
as->fmt_type = fp->fmt_type;
|
|
err = snd_pcm_new(chip->card, "USB Audio", chip->pcm_devs,
|
|
stream == SNDRV_PCM_STREAM_PLAYBACK ? 1 : 0,
|
|
stream == SNDRV_PCM_STREAM_PLAYBACK ? 0 : 1,
|
|
&pcm);
|
|
if (err < 0) {
|
|
kfree(as);
|
|
return err;
|
|
}
|
|
as->pcm = pcm;
|
|
pcm->private_data = as;
|
|
pcm->private_free = snd_usb_audio_pcm_free;
|
|
pcm->info_flags = 0;
|
|
if (chip->pcm_devs > 0)
|
|
sprintf(pcm->name, "USB Audio #%d", chip->pcm_devs);
|
|
else
|
|
strcpy(pcm->name, "USB Audio");
|
|
|
|
snd_usb_init_substream(as, stream, fp, pd);
|
|
|
|
/*
|
|
* Keep using head insertion for M-Audio Audiophile USB (tm) which has a
|
|
* fix to swap capture stream order in conf/cards/USB-audio.conf
|
|
*/
|
|
if (chip->usb_id == USB_ID(0x0763, 0x2003))
|
|
list_add(&as->list, &chip->pcm_list);
|
|
else
|
|
list_add_tail(&as->list, &chip->pcm_list);
|
|
|
|
chip->pcm_devs++;
|
|
|
|
snd_usb_proc_pcm_format_add(as);
|
|
|
|
return add_chmap(pcm, stream, &as->substream[stream]);
|
|
}
|
|
|
|
int snd_usb_add_audio_stream(struct snd_usb_audio *chip,
|
|
int stream,
|
|
struct audioformat *fp)
|
|
{
|
|
return __snd_usb_add_audio_stream(chip, stream, fp, NULL);
|
|
}
|
|
|
|
static int snd_usb_add_audio_stream_v3(struct snd_usb_audio *chip,
|
|
int stream,
|
|
struct audioformat *fp,
|
|
struct snd_usb_power_domain *pd)
|
|
{
|
|
return __snd_usb_add_audio_stream(chip, stream, fp, pd);
|
|
}
|
|
|
|
static int parse_uac_endpoint_attributes(struct snd_usb_audio *chip,
|
|
struct usb_host_interface *alts,
|
|
int protocol, int iface_no)
|
|
{
|
|
/* parsed with a v1 header here. that's ok as we only look at the
|
|
* header first which is the same for both versions */
|
|
struct uac_iso_endpoint_descriptor *csep;
|
|
struct usb_interface_descriptor *altsd = get_iface_desc(alts);
|
|
int attributes = 0;
|
|
|
|
csep = snd_usb_find_desc(alts->endpoint[0].extra, alts->endpoint[0].extralen, NULL, USB_DT_CS_ENDPOINT);
|
|
|
|
/* Creamware Noah has this descriptor after the 2nd endpoint */
|
|
if (!csep && altsd->bNumEndpoints >= 2)
|
|
csep = snd_usb_find_desc(alts->endpoint[1].extra, alts->endpoint[1].extralen, NULL, USB_DT_CS_ENDPOINT);
|
|
|
|
/*
|
|
* If we can't locate the USB_DT_CS_ENDPOINT descriptor in the extra
|
|
* bytes after the first endpoint, go search the entire interface.
|
|
* Some devices have it directly *before* the standard endpoint.
|
|
*/
|
|
if (!csep)
|
|
csep = snd_usb_find_desc(alts->extra, alts->extralen, NULL, USB_DT_CS_ENDPOINT);
|
|
|
|
if (!csep || csep->bLength < 7 ||
|
|
csep->bDescriptorSubtype != UAC_EP_GENERAL)
|
|
goto error;
|
|
|
|
if (protocol == UAC_VERSION_1) {
|
|
attributes = csep->bmAttributes;
|
|
} else if (protocol == UAC_VERSION_2) {
|
|
struct uac2_iso_endpoint_descriptor *csep2 =
|
|
(struct uac2_iso_endpoint_descriptor *) csep;
|
|
|
|
if (csep2->bLength < sizeof(*csep2))
|
|
goto error;
|
|
attributes = csep->bmAttributes & UAC_EP_CS_ATTR_FILL_MAX;
|
|
|
|
/* emulate the endpoint attributes of a v1 device */
|
|
if (csep2->bmControls & UAC2_CONTROL_PITCH)
|
|
attributes |= UAC_EP_CS_ATTR_PITCH_CONTROL;
|
|
} else { /* UAC_VERSION_3 */
|
|
struct uac3_iso_endpoint_descriptor *csep3 =
|
|
(struct uac3_iso_endpoint_descriptor *) csep;
|
|
|
|
if (csep3->bLength < sizeof(*csep3))
|
|
goto error;
|
|
/* emulate the endpoint attributes of a v1 device */
|
|
if (le32_to_cpu(csep3->bmControls) & UAC2_CONTROL_PITCH)
|
|
attributes |= UAC_EP_CS_ATTR_PITCH_CONTROL;
|
|
}
|
|
|
|
return attributes;
|
|
|
|
error:
|
|
usb_audio_warn(chip,
|
|
"%u:%d : no or invalid class specific endpoint descriptor\n",
|
|
iface_no, altsd->bAlternateSetting);
|
|
return 0;
|
|
}
|
|
|
|
/* find an input terminal descriptor (either UAC1 or UAC2) with the given
|
|
* terminal id
|
|
*/
|
|
static void *
|
|
snd_usb_find_input_terminal_descriptor(struct usb_host_interface *ctrl_iface,
|
|
int terminal_id, bool uac23)
|
|
{
|
|
struct uac2_input_terminal_descriptor *term = NULL;
|
|
size_t minlen = uac23 ? sizeof(struct uac2_input_terminal_descriptor) :
|
|
sizeof(struct uac_input_terminal_descriptor);
|
|
|
|
while ((term = snd_usb_find_csint_desc(ctrl_iface->extra,
|
|
ctrl_iface->extralen,
|
|
term, UAC_INPUT_TERMINAL))) {
|
|
if (term->bLength < minlen)
|
|
continue;
|
|
if (term->bTerminalID == terminal_id)
|
|
return term;
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
static void *
|
|
snd_usb_find_output_terminal_descriptor(struct usb_host_interface *ctrl_iface,
|
|
int terminal_id)
|
|
{
|
|
/* OK to use with both UAC2 and UAC3 */
|
|
struct uac2_output_terminal_descriptor *term = NULL;
|
|
|
|
while ((term = snd_usb_find_csint_desc(ctrl_iface->extra,
|
|
ctrl_iface->extralen,
|
|
term, UAC_OUTPUT_TERMINAL))) {
|
|
if (term->bLength >= sizeof(*term) &&
|
|
term->bTerminalID == terminal_id)
|
|
return term;
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
static struct audioformat *
|
|
audio_format_alloc_init(struct snd_usb_audio *chip,
|
|
struct usb_host_interface *alts,
|
|
int protocol, int iface_no, int altset_idx,
|
|
int altno, int num_channels, int clock)
|
|
{
|
|
struct audioformat *fp;
|
|
|
|
fp = kzalloc(sizeof(*fp), GFP_KERNEL);
|
|
if (!fp)
|
|
return NULL;
|
|
|
|
fp->iface = iface_no;
|
|
fp->altsetting = altno;
|
|
fp->altset_idx = altset_idx;
|
|
fp->endpoint = get_endpoint(alts, 0)->bEndpointAddress;
|
|
fp->ep_attr = get_endpoint(alts, 0)->bmAttributes;
|
|
fp->datainterval = snd_usb_parse_datainterval(chip, alts);
|
|
fp->protocol = protocol;
|
|
fp->maxpacksize = le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize);
|
|
fp->channels = num_channels;
|
|
if (snd_usb_get_speed(chip->dev) == USB_SPEED_HIGH)
|
|
fp->maxpacksize = (((fp->maxpacksize >> 11) & 3) + 1)
|
|
* (fp->maxpacksize & 0x7ff);
|
|
fp->clock = clock;
|
|
INIT_LIST_HEAD(&fp->list);
|
|
|
|
return fp;
|
|
}
|
|
|
|
static struct audioformat *
|
|
snd_usb_get_audioformat_uac12(struct snd_usb_audio *chip,
|
|
struct usb_host_interface *alts,
|
|
int protocol, int iface_no, int altset_idx,
|
|
int altno, int stream, int bm_quirk)
|
|
{
|
|
struct usb_device *dev = chip->dev;
|
|
struct uac_format_type_i_continuous_descriptor *fmt;
|
|
unsigned int num_channels = 0, chconfig = 0;
|
|
struct audioformat *fp;
|
|
int clock = 0;
|
|
u64 format;
|
|
|
|
/* get audio formats */
|
|
if (protocol == UAC_VERSION_1) {
|
|
struct uac1_as_header_descriptor *as =
|
|
snd_usb_find_csint_desc(alts->extra, alts->extralen,
|
|
NULL, UAC_AS_GENERAL);
|
|
struct uac_input_terminal_descriptor *iterm;
|
|
|
|
if (!as) {
|
|
dev_err(&dev->dev,
|
|
"%u:%d : UAC_AS_GENERAL descriptor not found\n",
|
|
iface_no, altno);
|
|
return NULL;
|
|
}
|
|
|
|
if (as->bLength < sizeof(*as)) {
|
|
dev_err(&dev->dev,
|
|
"%u:%d : invalid UAC_AS_GENERAL desc\n",
|
|
iface_no, altno);
|
|
return NULL;
|
|
}
|
|
|
|
format = le16_to_cpu(as->wFormatTag); /* remember the format value */
|
|
|
|
iterm = snd_usb_find_input_terminal_descriptor(chip->ctrl_intf,
|
|
as->bTerminalLink,
|
|
false);
|
|
if (iterm) {
|
|
num_channels = iterm->bNrChannels;
|
|
chconfig = le16_to_cpu(iterm->wChannelConfig);
|
|
}
|
|
} else { /* UAC_VERSION_2 */
|
|
struct uac2_input_terminal_descriptor *input_term;
|
|
struct uac2_output_terminal_descriptor *output_term;
|
|
struct uac2_as_header_descriptor *as =
|
|
snd_usb_find_csint_desc(alts->extra, alts->extralen,
|
|
NULL, UAC_AS_GENERAL);
|
|
|
|
if (!as) {
|
|
dev_err(&dev->dev,
|
|
"%u:%d : UAC_AS_GENERAL descriptor not found\n",
|
|
iface_no, altno);
|
|
return NULL;
|
|
}
|
|
|
|
if (as->bLength < sizeof(*as)) {
|
|
dev_err(&dev->dev,
|
|
"%u:%d : invalid UAC_AS_GENERAL desc\n",
|
|
iface_no, altno);
|
|
return NULL;
|
|
}
|
|
|
|
num_channels = as->bNrChannels;
|
|
format = le32_to_cpu(as->bmFormats);
|
|
chconfig = le32_to_cpu(as->bmChannelConfig);
|
|
|
|
/*
|
|
* lookup the terminal associated to this interface
|
|
* to extract the clock
|
|
*/
|
|
input_term = snd_usb_find_input_terminal_descriptor(chip->ctrl_intf,
|
|
as->bTerminalLink,
|
|
true);
|
|
if (input_term) {
|
|
clock = input_term->bCSourceID;
|
|
if (!chconfig && (num_channels == input_term->bNrChannels))
|
|
chconfig = le32_to_cpu(input_term->bmChannelConfig);
|
|
goto found_clock;
|
|
}
|
|
|
|
output_term = snd_usb_find_output_terminal_descriptor(chip->ctrl_intf,
|
|
as->bTerminalLink);
|
|
if (output_term) {
|
|
clock = output_term->bCSourceID;
|
|
goto found_clock;
|
|
}
|
|
|
|
dev_err(&dev->dev,
|
|
"%u:%d : bogus bTerminalLink %d\n",
|
|
iface_no, altno, as->bTerminalLink);
|
|
return NULL;
|
|
}
|
|
|
|
found_clock:
|
|
/* get format type */
|
|
fmt = snd_usb_find_csint_desc(alts->extra, alts->extralen,
|
|
NULL, UAC_FORMAT_TYPE);
|
|
if (!fmt) {
|
|
dev_err(&dev->dev,
|
|
"%u:%d : no UAC_FORMAT_TYPE desc\n",
|
|
iface_no, altno);
|
|
return NULL;
|
|
}
|
|
if (((protocol == UAC_VERSION_1) && (fmt->bLength < 8))
|
|
|| ((protocol == UAC_VERSION_2) &&
|
|
(fmt->bLength < 6))) {
|
|
dev_err(&dev->dev,
|
|
"%u:%d : invalid UAC_FORMAT_TYPE desc\n",
|
|
iface_no, altno);
|
|
return NULL;
|
|
}
|
|
|
|
/*
|
|
* Blue Microphones workaround: The last altsetting is
|
|
* identical with the previous one, except for a larger
|
|
* packet size, but is actually a mislabeled two-channel
|
|
* setting; ignore it.
|
|
*
|
|
* Part 2: analyze quirk flag and format
|
|
*/
|
|
if (bm_quirk && fmt->bNrChannels == 1 && fmt->bSubframeSize == 2)
|
|
return NULL;
|
|
|
|
fp = audio_format_alloc_init(chip, alts, protocol, iface_no,
|
|
altset_idx, altno, num_channels, clock);
|
|
if (!fp)
|
|
return ERR_PTR(-ENOMEM);
|
|
|
|
fp->attributes = parse_uac_endpoint_attributes(chip, alts, protocol,
|
|
iface_no);
|
|
|
|
/* some quirks for attributes here */
|
|
snd_usb_audioformat_attributes_quirk(chip, fp, stream);
|
|
|
|
/* ok, let's parse further... */
|
|
if (snd_usb_parse_audio_format(chip, fp, format,
|
|
fmt, stream) < 0) {
|
|
kfree(fp->rate_table);
|
|
kfree(fp);
|
|
return NULL;
|
|
}
|
|
|
|
/* Create chmap */
|
|
if (fp->channels != num_channels)
|
|
chconfig = 0;
|
|
|
|
fp->chmap = convert_chmap(fp->channels, chconfig, protocol);
|
|
|
|
return fp;
|
|
}
|
|
|
|
static struct audioformat *
|
|
snd_usb_get_audioformat_uac3(struct snd_usb_audio *chip,
|
|
struct usb_host_interface *alts,
|
|
struct snd_usb_power_domain **pd_out,
|
|
int iface_no, int altset_idx,
|
|
int altno, int stream)
|
|
{
|
|
struct usb_device *dev = chip->dev;
|
|
struct uac3_input_terminal_descriptor *input_term;
|
|
struct uac3_output_terminal_descriptor *output_term;
|
|
struct uac3_cluster_header_descriptor *cluster;
|
|
struct uac3_as_header_descriptor *as = NULL;
|
|
struct uac3_hc_descriptor_header hc_header;
|
|
struct snd_pcm_chmap_elem *chmap;
|
|
struct snd_usb_power_domain *pd;
|
|
unsigned char badd_profile;
|
|
u64 badd_formats = 0;
|
|
unsigned int num_channels;
|
|
struct audioformat *fp;
|
|
u16 cluster_id, wLength;
|
|
int clock = 0;
|
|
int err;
|
|
|
|
badd_profile = chip->badd_profile;
|
|
|
|
if (badd_profile >= UAC3_FUNCTION_SUBCLASS_GENERIC_IO) {
|
|
unsigned int maxpacksize =
|
|
le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize);
|
|
|
|
switch (maxpacksize) {
|
|
default:
|
|
dev_err(&dev->dev,
|
|
"%u:%d : incorrect wMaxPacketSize for BADD profile\n",
|
|
iface_no, altno);
|
|
return NULL;
|
|
case UAC3_BADD_EP_MAXPSIZE_SYNC_MONO_16:
|
|
case UAC3_BADD_EP_MAXPSIZE_ASYNC_MONO_16:
|
|
badd_formats = SNDRV_PCM_FMTBIT_S16_LE;
|
|
num_channels = 1;
|
|
break;
|
|
case UAC3_BADD_EP_MAXPSIZE_SYNC_MONO_24:
|
|
case UAC3_BADD_EP_MAXPSIZE_ASYNC_MONO_24:
|
|
badd_formats = SNDRV_PCM_FMTBIT_S24_3LE;
|
|
num_channels = 1;
|
|
break;
|
|
case UAC3_BADD_EP_MAXPSIZE_SYNC_STEREO_16:
|
|
case UAC3_BADD_EP_MAXPSIZE_ASYNC_STEREO_16:
|
|
badd_formats = SNDRV_PCM_FMTBIT_S16_LE;
|
|
num_channels = 2;
|
|
break;
|
|
case UAC3_BADD_EP_MAXPSIZE_SYNC_STEREO_24:
|
|
case UAC3_BADD_EP_MAXPSIZE_ASYNC_STEREO_24:
|
|
badd_formats = SNDRV_PCM_FMTBIT_S24_3LE;
|
|
num_channels = 2;
|
|
break;
|
|
}
|
|
|
|
chmap = kzalloc(sizeof(*chmap), GFP_KERNEL);
|
|
if (!chmap)
|
|
return ERR_PTR(-ENOMEM);
|
|
|
|
if (num_channels == 1) {
|
|
chmap->map[0] = SNDRV_CHMAP_MONO;
|
|
} else {
|
|
chmap->map[0] = SNDRV_CHMAP_FL;
|
|
chmap->map[1] = SNDRV_CHMAP_FR;
|
|
}
|
|
|
|
chmap->channels = num_channels;
|
|
clock = UAC3_BADD_CS_ID9;
|
|
goto found_clock;
|
|
}
|
|
|
|
as = snd_usb_find_csint_desc(alts->extra, alts->extralen,
|
|
NULL, UAC_AS_GENERAL);
|
|
if (!as) {
|
|
dev_err(&dev->dev,
|
|
"%u:%d : UAC_AS_GENERAL descriptor not found\n",
|
|
iface_no, altno);
|
|
return NULL;
|
|
}
|
|
|
|
if (as->bLength < sizeof(*as)) {
|
|
dev_err(&dev->dev,
|
|
"%u:%d : invalid UAC_AS_GENERAL desc\n",
|
|
iface_no, altno);
|
|
return NULL;
|
|
}
|
|
|
|
cluster_id = le16_to_cpu(as->wClusterDescrID);
|
|
if (!cluster_id) {
|
|
dev_err(&dev->dev,
|
|
"%u:%d : no cluster descriptor\n",
|
|
iface_no, altno);
|
|
return NULL;
|
|
}
|
|
|
|
/*
|
|
* Get number of channels and channel map through
|
|
* High Capability Cluster Descriptor
|
|
*
|
|
* First step: get High Capability header and
|
|
* read size of Cluster Descriptor
|
|
*/
|
|
err = snd_usb_ctl_msg(chip->dev,
|
|
usb_rcvctrlpipe(chip->dev, 0),
|
|
UAC3_CS_REQ_HIGH_CAPABILITY_DESCRIPTOR,
|
|
USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN,
|
|
cluster_id,
|
|
snd_usb_ctrl_intf(chip),
|
|
&hc_header, sizeof(hc_header));
|
|
if (err < 0)
|
|
return ERR_PTR(err);
|
|
else if (err != sizeof(hc_header)) {
|
|
dev_err(&dev->dev,
|
|
"%u:%d : can't get High Capability descriptor\n",
|
|
iface_no, altno);
|
|
return ERR_PTR(-EIO);
|
|
}
|
|
|
|
/*
|
|
* Second step: allocate needed amount of memory
|
|
* and request Cluster Descriptor
|
|
*/
|
|
wLength = le16_to_cpu(hc_header.wLength);
|
|
cluster = kzalloc(wLength, GFP_KERNEL);
|
|
if (!cluster)
|
|
return ERR_PTR(-ENOMEM);
|
|
err = snd_usb_ctl_msg(chip->dev,
|
|
usb_rcvctrlpipe(chip->dev, 0),
|
|
UAC3_CS_REQ_HIGH_CAPABILITY_DESCRIPTOR,
|
|
USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN,
|
|
cluster_id,
|
|
snd_usb_ctrl_intf(chip),
|
|
cluster, wLength);
|
|
if (err < 0) {
|
|
kfree(cluster);
|
|
return ERR_PTR(err);
|
|
} else if (err != wLength) {
|
|
dev_err(&dev->dev,
|
|
"%u:%d : can't get Cluster Descriptor\n",
|
|
iface_no, altno);
|
|
kfree(cluster);
|
|
return ERR_PTR(-EIO);
|
|
}
|
|
|
|
num_channels = cluster->bNrChannels;
|
|
chmap = convert_chmap_v3(cluster);
|
|
kfree(cluster);
|
|
|
|
/*
|
|
* lookup the terminal associated to this interface
|
|
* to extract the clock
|
|
*/
|
|
input_term = snd_usb_find_input_terminal_descriptor(chip->ctrl_intf,
|
|
as->bTerminalLink,
|
|
true);
|
|
if (input_term) {
|
|
clock = input_term->bCSourceID;
|
|
goto found_clock;
|
|
}
|
|
|
|
output_term = snd_usb_find_output_terminal_descriptor(chip->ctrl_intf,
|
|
as->bTerminalLink);
|
|
if (output_term) {
|
|
clock = output_term->bCSourceID;
|
|
goto found_clock;
|
|
}
|
|
|
|
dev_err(&dev->dev, "%u:%d : bogus bTerminalLink %d\n",
|
|
iface_no, altno, as->bTerminalLink);
|
|
kfree(chmap);
|
|
return NULL;
|
|
|
|
found_clock:
|
|
fp = audio_format_alloc_init(chip, alts, UAC_VERSION_3, iface_no,
|
|
altset_idx, altno, num_channels, clock);
|
|
if (!fp) {
|
|
kfree(chmap);
|
|
return ERR_PTR(-ENOMEM);
|
|
}
|
|
|
|
fp->chmap = chmap;
|
|
|
|
if (badd_profile >= UAC3_FUNCTION_SUBCLASS_GENERIC_IO) {
|
|
fp->attributes = 0; /* No attributes */
|
|
|
|
fp->fmt_type = UAC_FORMAT_TYPE_I;
|
|
fp->formats = badd_formats;
|
|
|
|
fp->nr_rates = 0; /* SNDRV_PCM_RATE_CONTINUOUS */
|
|
fp->rate_min = UAC3_BADD_SAMPLING_RATE;
|
|
fp->rate_max = UAC3_BADD_SAMPLING_RATE;
|
|
fp->rates = SNDRV_PCM_RATE_CONTINUOUS;
|
|
|
|
pd = kzalloc(sizeof(*pd), GFP_KERNEL);
|
|
if (!pd) {
|
|
kfree(fp->chmap);
|
|
kfree(fp->rate_table);
|
|
kfree(fp);
|
|
return NULL;
|
|
}
|
|
pd->pd_id = (stream == SNDRV_PCM_STREAM_PLAYBACK) ?
|
|
UAC3_BADD_PD_ID10 : UAC3_BADD_PD_ID11;
|
|
pd->pd_d1d0_rec = UAC3_BADD_PD_RECOVER_D1D0;
|
|
pd->pd_d2d0_rec = UAC3_BADD_PD_RECOVER_D2D0;
|
|
|
|
} else {
|
|
fp->attributes = parse_uac_endpoint_attributes(chip, alts,
|
|
UAC_VERSION_3,
|
|
iface_no);
|
|
|
|
pd = snd_usb_find_power_domain(chip->ctrl_intf,
|
|
as->bTerminalLink);
|
|
|
|
/* ok, let's parse further... */
|
|
if (snd_usb_parse_audio_format_v3(chip, fp, as, stream) < 0) {
|
|
kfree(pd);
|
|
kfree(fp->chmap);
|
|
kfree(fp->rate_table);
|
|
kfree(fp);
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
if (pd)
|
|
*pd_out = pd;
|
|
|
|
return fp;
|
|
}
|
|
|
|
int snd_usb_parse_audio_interface(struct snd_usb_audio *chip, int iface_no)
|
|
{
|
|
struct usb_device *dev;
|
|
struct usb_interface *iface;
|
|
struct usb_host_interface *alts;
|
|
struct usb_interface_descriptor *altsd;
|
|
int i, altno, err, stream;
|
|
struct audioformat *fp = NULL;
|
|
struct snd_usb_power_domain *pd = NULL;
|
|
int num, protocol;
|
|
|
|
dev = chip->dev;
|
|
|
|
/* parse the interface's altsettings */
|
|
iface = usb_ifnum_to_if(dev, iface_no);
|
|
|
|
num = iface->num_altsetting;
|
|
|
|
/*
|
|
* Dallas DS4201 workaround: It presents 5 altsettings, but the last
|
|
* one misses syncpipe, and does not produce any sound.
|
|
*/
|
|
if (chip->usb_id == USB_ID(0x04fa, 0x4201))
|
|
num = 4;
|
|
|
|
for (i = 0; i < num; i++) {
|
|
alts = &iface->altsetting[i];
|
|
altsd = get_iface_desc(alts);
|
|
protocol = altsd->bInterfaceProtocol;
|
|
/* skip invalid one */
|
|
if (((altsd->bInterfaceClass != USB_CLASS_AUDIO ||
|
|
(altsd->bInterfaceSubClass != USB_SUBCLASS_AUDIOSTREAMING &&
|
|
altsd->bInterfaceSubClass != USB_SUBCLASS_VENDOR_SPEC)) &&
|
|
altsd->bInterfaceClass != USB_CLASS_VENDOR_SPEC) ||
|
|
altsd->bNumEndpoints < 1 ||
|
|
le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize) == 0)
|
|
continue;
|
|
/* must be isochronous */
|
|
if ((get_endpoint(alts, 0)->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) !=
|
|
USB_ENDPOINT_XFER_ISOC)
|
|
continue;
|
|
/* check direction */
|
|
stream = (get_endpoint(alts, 0)->bEndpointAddress & USB_DIR_IN) ?
|
|
SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK;
|
|
altno = altsd->bAlternateSetting;
|
|
|
|
if (snd_usb_apply_interface_quirk(chip, iface_no, altno))
|
|
continue;
|
|
|
|
/*
|
|
* Roland audio streaming interfaces are marked with protocols
|
|
* 0/1/2, but are UAC 1 compatible.
|
|
*/
|
|
if (USB_ID_VENDOR(chip->usb_id) == 0x0582 &&
|
|
altsd->bInterfaceClass == USB_CLASS_VENDOR_SPEC &&
|
|
protocol <= 2)
|
|
protocol = UAC_VERSION_1;
|
|
|
|
switch (protocol) {
|
|
default:
|
|
dev_dbg(&dev->dev, "%u:%d: unknown interface protocol %#02x, assuming v1\n",
|
|
iface_no, altno, protocol);
|
|
protocol = UAC_VERSION_1;
|
|
/* fall through */
|
|
case UAC_VERSION_1:
|
|
/* fall through */
|
|
case UAC_VERSION_2: {
|
|
int bm_quirk = 0;
|
|
|
|
/*
|
|
* Blue Microphones workaround: The last altsetting is
|
|
* identical with the previous one, except for a larger
|
|
* packet size, but is actually a mislabeled two-channel
|
|
* setting; ignore it.
|
|
*
|
|
* Part 1: prepare quirk flag
|
|
*/
|
|
if (altno == 2 && num == 3 &&
|
|
fp && fp->altsetting == 1 && fp->channels == 1 &&
|
|
fp->formats == SNDRV_PCM_FMTBIT_S16_LE &&
|
|
protocol == UAC_VERSION_1 &&
|
|
le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize) ==
|
|
fp->maxpacksize * 2)
|
|
bm_quirk = 1;
|
|
|
|
fp = snd_usb_get_audioformat_uac12(chip, alts, protocol,
|
|
iface_no, i, altno,
|
|
stream, bm_quirk);
|
|
break;
|
|
}
|
|
case UAC_VERSION_3:
|
|
fp = snd_usb_get_audioformat_uac3(chip, alts, &pd,
|
|
iface_no, i, altno, stream);
|
|
break;
|
|
}
|
|
|
|
if (!fp)
|
|
continue;
|
|
else if (IS_ERR(fp))
|
|
return PTR_ERR(fp);
|
|
|
|
dev_dbg(&dev->dev, "%u:%d: add audio endpoint %#x\n", iface_no, altno, fp->endpoint);
|
|
if (protocol == UAC_VERSION_3)
|
|
err = snd_usb_add_audio_stream_v3(chip, stream, fp, pd);
|
|
else
|
|
err = snd_usb_add_audio_stream(chip, stream, fp);
|
|
|
|
if (err < 0) {
|
|
list_del(&fp->list); /* unlink for avoiding double-free */
|
|
kfree(pd);
|
|
kfree(fp->rate_table);
|
|
kfree(fp->chmap);
|
|
kfree(fp);
|
|
return err;
|
|
}
|
|
/* try to set the interface... */
|
|
usb_set_interface(chip->dev, iface_no, altno);
|
|
snd_usb_init_pitch(chip, iface_no, alts, fp);
|
|
snd_usb_init_sample_rate(chip, iface_no, alts, fp, fp->rate_max);
|
|
}
|
|
return 0;
|
|
}
|
|
|