v4.19.13 snapshot.
diff --git a/sound/usb/stream.c b/sound/usb/stream.c
new file mode 100644
index 0000000..67cf849
--- /dev/null
+++ b/sound/usb/stream.c
@@ -0,0 +1,1197 @@
+/*
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/usb.h>
+#include <linux/usb/audio.h>
+#include <linux/usb/audio-v2.h>
+#include <linux/usb/audio-v3.h>
+
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/control.h>
+#include <sound/tlv.h>
+
+#include "usbaudio.h"
+#include "card.h"
+#include "proc.h"
+#include "quirks.h"
+#include "endpoint.h"
+#include "pcm.h"
+#include "helper.h"
+#include "format.h"
+#include "clock.h"
+#include "stream.h"
+#include "power.h"
+
+/*
+ * free a substream
+ */
+static void free_substream(struct snd_usb_substream *subs)
+{
+ struct audioformat *fp, *n;
+
+ if (!subs->num_formats)
+ return; /* not initialized */
+ list_for_each_entry_safe(fp, n, &subs->fmt_list, list) {
+ kfree(fp->rate_table);
+ kfree(fp->chmap);
+ kfree(fp);
+ }
+ kfree(subs->rate_list.list);
+ kfree(subs->str_pd);
+}
+
+
+/*
+ * free a usb stream instance
+ */
+static void snd_usb_audio_stream_free(struct snd_usb_stream *stream)
+{
+ free_substream(&stream->substream[0]);
+ free_substream(&stream->substream[1]);
+ list_del(&stream->list);
+ kfree(stream);
+}
+
+static void snd_usb_audio_pcm_free(struct snd_pcm *pcm)
+{
+ struct snd_usb_stream *stream = pcm->private_data;
+ if (stream) {
+ stream->pcm = NULL;
+ snd_usb_audio_stream_free(stream);
+ }
+}
+
+/*
+ * initialize the substream instance.
+ */
+
+static void snd_usb_init_substream(struct snd_usb_stream *as,
+ int stream,
+ struct audioformat *fp,
+ struct snd_usb_power_domain *pd)
+{
+ struct snd_usb_substream *subs = &as->substream[stream];
+
+ INIT_LIST_HEAD(&subs->fmt_list);
+ spin_lock_init(&subs->lock);
+
+ subs->stream = as;
+ subs->direction = stream;
+ subs->dev = as->chip->dev;
+ subs->txfr_quirk = as->chip->txfr_quirk;
+ subs->tx_length_quirk = as->chip->tx_length_quirk;
+ subs->speed = snd_usb_get_speed(subs->dev);
+ subs->pkt_offset_adj = 0;
+
+ snd_usb_set_pcm_ops(as->pcm, stream);
+
+ list_add_tail(&fp->list, &subs->fmt_list);
+ subs->formats |= fp->formats;
+ subs->num_formats++;
+ subs->fmt_type = fp->fmt_type;
+ subs->ep_num = fp->endpoint;
+ if (fp->channels > subs->channels_max)
+ subs->channels_max = fp->channels;
+
+ if (pd) {
+ subs->str_pd = pd;
+ /* Initialize Power Domain to idle status D1 */
+ snd_usb_power_domain_set(subs->stream->chip, pd,
+ UAC3_PD_STATE_D1);
+ }
+
+ snd_usb_preallocate_buffer(subs);
+}
+
+/* kctl callbacks for usb-audio channel maps */
+static int usb_chmap_ctl_info(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_info *uinfo)
+{
+ struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol);
+ struct snd_usb_substream *subs = info->private_data;
+
+ uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
+ uinfo->count = subs->channels_max;
+ uinfo->value.integer.min = 0;
+ uinfo->value.integer.max = SNDRV_CHMAP_LAST;
+ return 0;
+}
+
+/* check whether a duplicated entry exists in the audiofmt list */
+static bool have_dup_chmap(struct snd_usb_substream *subs,
+ struct audioformat *fp)
+{
+ struct audioformat *prev = fp;
+
+ list_for_each_entry_continue_reverse(prev, &subs->fmt_list, list) {
+ if (prev->chmap &&
+ !memcmp(prev->chmap, fp->chmap, sizeof(*fp->chmap)))
+ return true;
+ }
+ return false;
+}
+
+static int usb_chmap_ctl_tlv(struct snd_kcontrol *kcontrol, int op_flag,
+ unsigned int size, unsigned int __user *tlv)
+{
+ struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol);
+ struct snd_usb_substream *subs = info->private_data;
+ struct audioformat *fp;
+ unsigned int __user *dst;
+ int count = 0;
+
+ if (size < 8)
+ return -ENOMEM;
+ if (put_user(SNDRV_CTL_TLVT_CONTAINER, tlv))
+ return -EFAULT;
+ size -= 8;
+ dst = tlv + 2;
+ list_for_each_entry(fp, &subs->fmt_list, list) {
+ int i, ch_bytes;
+
+ if (!fp->chmap)
+ continue;
+ if (have_dup_chmap(subs, fp))
+ continue;
+ /* copy the entry */
+ ch_bytes = fp->chmap->channels * 4;
+ if (size < 8 + ch_bytes)
+ return -ENOMEM;
+ if (put_user(SNDRV_CTL_TLVT_CHMAP_FIXED, dst) ||
+ put_user(ch_bytes, dst + 1))
+ return -EFAULT;
+ dst += 2;
+ for (i = 0; i < fp->chmap->channels; i++, dst++) {
+ if (put_user(fp->chmap->map[i], dst))
+ return -EFAULT;
+ }
+
+ count += 8 + ch_bytes;
+ size -= 8 + ch_bytes;
+ }
+ if (put_user(count, tlv + 1))
+ return -EFAULT;
+ return 0;
+}
+
+static int usb_chmap_ctl_get(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ struct snd_pcm_chmap *info = snd_kcontrol_chip(kcontrol);
+ struct snd_usb_substream *subs = info->private_data;
+ struct snd_pcm_chmap_elem *chmap = NULL;
+ int i;
+
+ memset(ucontrol->value.integer.value, 0,
+ sizeof(ucontrol->value.integer.value));
+ if (subs->cur_audiofmt)
+ chmap = subs->cur_audiofmt->chmap;
+ if (chmap) {
+ for (i = 0; i < chmap->channels; i++)
+ ucontrol->value.integer.value[i] = chmap->map[i];
+ }
+ return 0;
+}
+
+/* create a chmap kctl assigned to the given USB substream */
+static int add_chmap(struct snd_pcm *pcm, int stream,
+ struct snd_usb_substream *subs)
+{
+ struct audioformat *fp;
+ struct snd_pcm_chmap *chmap;
+ struct snd_kcontrol *kctl;
+ int err;
+
+ list_for_each_entry(fp, &subs->fmt_list, list)
+ if (fp->chmap)
+ goto ok;
+ /* no chmap is found */
+ return 0;
+
+ ok:
+ err = snd_pcm_add_chmap_ctls(pcm, stream, NULL, 0, 0, &chmap);
+ if (err < 0)
+ return err;
+
+ /* override handlers */
+ chmap->private_data = subs;
+ kctl = chmap->kctl;
+ kctl->info = usb_chmap_ctl_info;
+ kctl->get = usb_chmap_ctl_get;
+ kctl->tlv.c = usb_chmap_ctl_tlv;
+
+ return 0;
+}
+
+/* convert from USB ChannelConfig bits to ALSA chmap element */
+static struct snd_pcm_chmap_elem *convert_chmap(int channels, unsigned int bits,
+ int protocol)
+{
+ static unsigned int uac1_maps[] = {
+ SNDRV_CHMAP_FL, /* left front */
+ SNDRV_CHMAP_FR, /* right front */
+ SNDRV_CHMAP_FC, /* center front */
+ SNDRV_CHMAP_LFE, /* LFE */
+ SNDRV_CHMAP_SL, /* left surround */
+ SNDRV_CHMAP_SR, /* right surround */
+ SNDRV_CHMAP_FLC, /* left of center */
+ SNDRV_CHMAP_FRC, /* right of center */
+ SNDRV_CHMAP_RC, /* surround */
+ SNDRV_CHMAP_SL, /* side left */
+ SNDRV_CHMAP_SR, /* side right */
+ SNDRV_CHMAP_TC, /* top */
+ 0 /* terminator */
+ };
+ static unsigned int uac2_maps[] = {
+ SNDRV_CHMAP_FL, /* front left */
+ SNDRV_CHMAP_FR, /* front right */
+ SNDRV_CHMAP_FC, /* front center */
+ SNDRV_CHMAP_LFE, /* LFE */
+ SNDRV_CHMAP_RL, /* back left */
+ SNDRV_CHMAP_RR, /* back right */
+ SNDRV_CHMAP_FLC, /* front left of center */
+ SNDRV_CHMAP_FRC, /* front right of center */
+ SNDRV_CHMAP_RC, /* back center */
+ SNDRV_CHMAP_SL, /* side left */
+ SNDRV_CHMAP_SR, /* side right */
+ SNDRV_CHMAP_TC, /* top center */
+ SNDRV_CHMAP_TFL, /* top front left */
+ SNDRV_CHMAP_TFC, /* top front center */
+ SNDRV_CHMAP_TFR, /* top front right */
+ SNDRV_CHMAP_TRL, /* top back left */
+ SNDRV_CHMAP_TRC, /* top back center */
+ SNDRV_CHMAP_TRR, /* top back right */
+ SNDRV_CHMAP_TFLC, /* top front left of center */
+ SNDRV_CHMAP_TFRC, /* top front right of center */
+ SNDRV_CHMAP_LLFE, /* left LFE */
+ SNDRV_CHMAP_RLFE, /* right LFE */
+ SNDRV_CHMAP_TSL, /* top side left */
+ SNDRV_CHMAP_TSR, /* top side right */
+ SNDRV_CHMAP_BC, /* bottom center */
+ SNDRV_CHMAP_RLC, /* back left of center */
+ SNDRV_CHMAP_RRC, /* back right of center */
+ 0 /* terminator */
+ };
+ struct snd_pcm_chmap_elem *chmap;
+ const unsigned int *maps;
+ int c;
+
+ if (channels > ARRAY_SIZE(chmap->map))
+ return NULL;
+
+ chmap = kzalloc(sizeof(*chmap), GFP_KERNEL);
+ if (!chmap)
+ return NULL;
+
+ maps = protocol == UAC_VERSION_2 ? uac2_maps : uac1_maps;
+ chmap->channels = channels;
+ c = 0;
+
+ if (bits) {
+ for (; bits && *maps; maps++, bits >>= 1)
+ if (bits & 1)
+ chmap->map[c++] = *maps;
+ } else {
+ /* If we're missing wChannelConfig, then guess something
+ to make sure the channel map is not skipped entirely */
+ if (channels == 1)
+ chmap->map[c++] = SNDRV_CHMAP_MONO;
+ else
+ for (; c < channels && *maps; maps++)
+ chmap->map[c++] = *maps;
+ }
+
+ for (; c < channels; c++)
+ chmap->map[c] = SNDRV_CHMAP_UNKNOWN;
+
+ return chmap;
+}
+
+/* UAC3 device stores channels information in Cluster Descriptors */
+static struct
+snd_pcm_chmap_elem *convert_chmap_v3(struct uac3_cluster_header_descriptor
+ *cluster)
+{
+ unsigned int channels = cluster->bNrChannels;
+ struct snd_pcm_chmap_elem *chmap;
+ void *p = cluster;
+ int len, c;
+
+ if (channels > ARRAY_SIZE(chmap->map))
+ return NULL;
+
+ chmap = kzalloc(sizeof(*chmap), GFP_KERNEL);
+ if (!chmap)
+ return NULL;
+
+ len = le16_to_cpu(cluster->wLength);
+ c = 0;
+ p += sizeof(struct uac3_cluster_header_descriptor);
+
+ while (((p - (void *)cluster) < len) && (c < channels)) {
+ struct uac3_cluster_segment_descriptor *cs_desc = p;
+ u16 cs_len;
+ u8 cs_type;
+
+ cs_len = le16_to_cpu(cs_desc->wLength);
+ cs_type = cs_desc->bSegmentType;
+
+ if (cs_type == UAC3_CHANNEL_INFORMATION) {
+ struct uac3_cluster_information_segment_descriptor *is = p;
+ unsigned char map;
+
+ /*
+ * TODO: this conversion is not complete, update it
+ * after adding UAC3 values to asound.h
+ */
+ switch (is->bChRelationship) {
+ case UAC3_CH_MONO:
+ map = SNDRV_CHMAP_MONO;
+ break;
+ case UAC3_CH_LEFT:
+ case UAC3_CH_FRONT_LEFT:
+ case UAC3_CH_HEADPHONE_LEFT:
+ map = SNDRV_CHMAP_FL;
+ break;
+ case UAC3_CH_RIGHT:
+ case UAC3_CH_FRONT_RIGHT:
+ case UAC3_CH_HEADPHONE_RIGHT:
+ map = SNDRV_CHMAP_FR;
+ break;
+ case UAC3_CH_FRONT_CENTER:
+ map = SNDRV_CHMAP_FC;
+ break;
+ case UAC3_CH_FRONT_LEFT_OF_CENTER:
+ map = SNDRV_CHMAP_FLC;
+ break;
+ case UAC3_CH_FRONT_RIGHT_OF_CENTER:
+ map = SNDRV_CHMAP_FRC;
+ break;
+ case UAC3_CH_SIDE_LEFT:
+ map = SNDRV_CHMAP_SL;
+ break;
+ case UAC3_CH_SIDE_RIGHT:
+ map = SNDRV_CHMAP_SR;
+ break;
+ case UAC3_CH_BACK_LEFT:
+ map = SNDRV_CHMAP_RL;
+ break;
+ case UAC3_CH_BACK_RIGHT:
+ map = SNDRV_CHMAP_RR;
+ break;
+ case UAC3_CH_BACK_CENTER:
+ map = SNDRV_CHMAP_RC;
+ break;
+ case UAC3_CH_BACK_LEFT_OF_CENTER:
+ map = SNDRV_CHMAP_RLC;
+ break;
+ case UAC3_CH_BACK_RIGHT_OF_CENTER:
+ map = SNDRV_CHMAP_RRC;
+ break;
+ case UAC3_CH_TOP_CENTER:
+ map = SNDRV_CHMAP_TC;
+ break;
+ case UAC3_CH_TOP_FRONT_LEFT:
+ map = SNDRV_CHMAP_TFL;
+ break;
+ case UAC3_CH_TOP_FRONT_RIGHT:
+ map = SNDRV_CHMAP_TFR;
+ break;
+ case UAC3_CH_TOP_FRONT_CENTER:
+ map = SNDRV_CHMAP_TFC;
+ break;
+ case UAC3_CH_TOP_FRONT_LOC:
+ map = SNDRV_CHMAP_TFLC;
+ break;
+ case UAC3_CH_TOP_FRONT_ROC:
+ map = SNDRV_CHMAP_TFRC;
+ break;
+ case UAC3_CH_TOP_SIDE_LEFT:
+ map = SNDRV_CHMAP_TSL;
+ break;
+ case UAC3_CH_TOP_SIDE_RIGHT:
+ map = SNDRV_CHMAP_TSR;
+ break;
+ case UAC3_CH_TOP_BACK_LEFT:
+ map = SNDRV_CHMAP_TRL;
+ break;
+ case UAC3_CH_TOP_BACK_RIGHT:
+ map = SNDRV_CHMAP_TRR;
+ break;
+ case UAC3_CH_TOP_BACK_CENTER:
+ map = SNDRV_CHMAP_TRC;
+ break;
+ case UAC3_CH_BOTTOM_CENTER:
+ map = SNDRV_CHMAP_BC;
+ break;
+ case UAC3_CH_LOW_FREQUENCY_EFFECTS:
+ map = SNDRV_CHMAP_LFE;
+ break;
+ case UAC3_CH_LFE_LEFT:
+ map = SNDRV_CHMAP_LLFE;
+ break;
+ case UAC3_CH_LFE_RIGHT:
+ map = SNDRV_CHMAP_RLFE;
+ break;
+ case UAC3_CH_RELATIONSHIP_UNDEFINED:
+ default:
+ map = SNDRV_CHMAP_UNKNOWN;
+ break;
+ }
+ chmap->map[c++] = map;
+ }
+ p += cs_len;
+ }
+
+ if (channels < c)
+ pr_err("%s: channel number mismatch\n", __func__);
+
+ chmap->channels = channels;
+
+ for (; c < channels; c++)
+ chmap->map[c] = SNDRV_CHMAP_UNKNOWN;
+
+ return chmap;
+}
+
+/*
+ * add this endpoint to the chip instance.
+ * if a stream with the same endpoint already exists, append to it.
+ * if not, create a new pcm stream. note, fp is added to the substream
+ * fmt_list and will be freed on the chip instance release. do not free
+ * fp or do remove it from the substream fmt_list to avoid double-free.
+ */
+static int __snd_usb_add_audio_stream(struct snd_usb_audio *chip,
+ int stream,
+ struct audioformat *fp,
+ struct snd_usb_power_domain *pd)
+
+{
+ struct snd_usb_stream *as;
+ struct snd_usb_substream *subs;
+ struct snd_pcm *pcm;
+ int err;
+
+ 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 == fp->endpoint) {
+ 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) {
+ usb_audio_warn(chip,
+ "%u:%d : no or invalid class specific endpoint descriptor\n",
+ iface_no, altsd->bAlternateSetting);
+ return 0;
+ }
+
+ 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;
+
+ 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;
+
+ /* 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;
+}
+
+/* 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)
+{
+ struct uac2_input_terminal_descriptor *term = NULL;
+
+ while ((term = snd_usb_find_csint_desc(ctrl_iface->extra,
+ ctrl_iface->extralen,
+ term, UAC_INPUT_TERMINAL))) {
+ 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->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);
+ 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);
+ 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);
+ 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->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;
+}
+