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@@ -0,0 +1,453 @@
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+/*
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+ * This program is free software; you can redistribute it and/or modify
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+ * it under the terms of the GNU General Public License as published by
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+ * the Free Software Foundation; either version 2 of the License, or
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+ * (at your option) any later version.
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+ *
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+ * This program is distributed in the hope that it will be useful,
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+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
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+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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+ * GNU General Public License for more details.
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+ *
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+ * You should have received a copy of the GNU General Public License
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+ * along with this program; if not, write to the Free Software
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+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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+ */
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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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+
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+#include <sound/core.h>
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+#include <sound/pcm.h>
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+
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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 "urb.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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+
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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 list_head *p, *n;
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+
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+ if (!subs->num_formats)
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+ return; /* not initialized */
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+ list_for_each_safe(p, n, &subs->fmt_list) {
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+ struct audioformat *fp = list_entry(p, struct audioformat, list);
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+ kfree(fp->rate_table);
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+ kfree(fp);
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+ }
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+ kfree(subs->rate_list.list);
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+}
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+
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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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+
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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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+
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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.
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+ */
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+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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+{
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+ struct list_head *p;
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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(p, &chip->pcm_list) {
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+ as = list_entry(p, struct snd_usb_stream, 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];
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+ if (!subs->endpoint)
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+ continue;
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+ if (subs->endpoint == fp->endpoint) {
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+ list_add_tail(&fp->list, &subs->fmt_list);
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+ subs->num_formats++;
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+ subs->formats |= fp->formats;
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+ return 0;
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+ }
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+ }
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+ /* look for an empty stream */
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+ list_for_each(p, &chip->pcm_list) {
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+ as = list_entry(p, struct snd_usb_stream, 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];
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+ if (subs->endpoint)
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+ continue;
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+ err = snd_pcm_new_stream(as->pcm, stream, 1);
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+ if (err < 0)
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+ return err;
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+ snd_usb_init_substream(as, stream, fp);
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+ return 0;
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+ }
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+
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+ /* create a new pcm */
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+ as = kzalloc(sizeof(*as), GFP_KERNEL);
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+ if (!as)
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+ return -ENOMEM;
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+ as->pcm_index = chip->pcm_devs;
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+ as->chip = chip;
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+ as->fmt_type = fp->fmt_type;
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+ err = snd_pcm_new(chip->card, "USB Audio", chip->pcm_devs,
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+ stream == SNDRV_PCM_STREAM_PLAYBACK ? 1 : 0,
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+ stream == SNDRV_PCM_STREAM_PLAYBACK ? 0 : 1,
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+ &pcm);
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+ if (err < 0) {
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+ kfree(as);
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+ return err;
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+ }
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+ as->pcm = pcm;
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+ pcm->private_data = as;
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+ pcm->private_free = snd_usb_audio_pcm_free;
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+ pcm->info_flags = 0;
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+ if (chip->pcm_devs > 0)
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+ sprintf(pcm->name, "USB Audio #%d", chip->pcm_devs);
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+ else
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+ strcpy(pcm->name, "USB Audio");
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+
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+ snd_usb_init_substream(as, stream, fp);
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+
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+ list_add(&as->list, &chip->pcm_list);
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+ chip->pcm_devs++;
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+
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+ snd_usb_proc_pcm_format_add(as);
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+
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+ return 0;
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+}
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+
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+static int parse_uac_endpoint_attributes(struct snd_usb_audio *chip,
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+ struct usb_host_interface *alts,
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+ int protocol, int iface_no)
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+{
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+ /* parsed with a v1 header here. that's ok as we only look at the
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+ * header first which is the same for both versions */
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+ struct uac_iso_endpoint_descriptor *csep;
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+ struct usb_interface_descriptor *altsd = get_iface_desc(alts);
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+ int attributes = 0;
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+
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+ csep = snd_usb_find_desc(alts->endpoint[0].extra, alts->endpoint[0].extralen, NULL, USB_DT_CS_ENDPOINT);
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+
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+ /* Creamware Noah has this descriptor after the 2nd endpoint */
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+ if (!csep && altsd->bNumEndpoints >= 2)
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+ csep = snd_usb_find_desc(alts->endpoint[1].extra, alts->endpoint[1].extralen, NULL, USB_DT_CS_ENDPOINT);
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+
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+ if (!csep || csep->bLength < 7 ||
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+ csep->bDescriptorSubtype != UAC_EP_GENERAL) {
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+ snd_printk(KERN_WARNING "%d:%u:%d : no or invalid"
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+ " class specific endpoint descriptor\n",
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+ chip->dev->devnum, iface_no,
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+ altsd->bAlternateSetting);
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+ return 0;
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+ }
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+
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+ if (protocol == UAC_VERSION_1) {
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+ attributes = csep->bmAttributes;
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+ } else {
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+ struct uac2_iso_endpoint_descriptor *csep2 =
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+ (struct uac2_iso_endpoint_descriptor *) csep;
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+
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+ attributes = csep->bmAttributes & UAC_EP_CS_ATTR_FILL_MAX;
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+
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+ /* emulate the endpoint attributes of a v1 device */
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+ if (csep2->bmControls & UAC2_CONTROL_PITCH)
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+ attributes |= UAC_EP_CS_ATTR_PITCH_CONTROL;
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+ }
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+
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+ return attributes;
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+}
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+
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+static struct uac2_input_terminal_descriptor *
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+ snd_usb_find_input_terminal_descriptor(struct usb_host_interface *ctrl_iface,
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+ int terminal_id)
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+{
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+ struct uac2_input_terminal_descriptor *term = NULL;
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+
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+ while ((term = snd_usb_find_csint_desc(ctrl_iface->extra,
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+ ctrl_iface->extralen,
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+ term, UAC_INPUT_TERMINAL))) {
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+ if (term->bTerminalID == terminal_id)
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+ return term;
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+ }
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+
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+ return NULL;
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+}
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+
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+static struct uac2_output_terminal_descriptor *
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+ snd_usb_find_output_terminal_descriptor(struct usb_host_interface *ctrl_iface,
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+ int terminal_id)
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+{
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+ struct uac2_output_terminal_descriptor *term = NULL;
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+
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+ while ((term = snd_usb_find_csint_desc(ctrl_iface->extra,
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+ ctrl_iface->extralen,
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+ term, UAC_OUTPUT_TERMINAL))) {
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+ if (term->bTerminalID == terminal_id)
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+ return term;
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+ }
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+
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+ return NULL;
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+}
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+
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+int snd_usb_parse_audio_interface(struct snd_usb_audio *chip, int iface_no)
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+{
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+ struct usb_device *dev;
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+ struct usb_interface *iface;
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+ struct usb_host_interface *alts;
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+ struct usb_interface_descriptor *altsd;
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+ int i, altno, err, stream;
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+ int format = 0, num_channels = 0;
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+ struct audioformat *fp = NULL;
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+ int num, protocol, clock = 0;
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+ struct uac_format_type_i_continuous_descriptor *fmt;
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+
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+ dev = chip->dev;
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+
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+ /* parse the interface's altsettings */
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+ iface = usb_ifnum_to_if(dev, iface_no);
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+
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+ num = iface->num_altsetting;
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+
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+ /*
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+ * Dallas DS4201 workaround: It presents 5 altsettings, but the last
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+ * one misses syncpipe, and does not produce any sound.
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+ */
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+ if (chip->usb_id == USB_ID(0x04fa, 0x4201))
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+ num = 4;
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+
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+ for (i = 0; i < num; i++) {
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+ alts = &iface->altsetting[i];
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+ altsd = get_iface_desc(alts);
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+ protocol = altsd->bInterfaceProtocol;
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+ /* skip invalid one */
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+ if ((altsd->bInterfaceClass != USB_CLASS_AUDIO &&
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+ altsd->bInterfaceClass != USB_CLASS_VENDOR_SPEC) ||
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+ (altsd->bInterfaceSubClass != USB_SUBCLASS_AUDIOSTREAMING &&
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+ altsd->bInterfaceSubClass != USB_SUBCLASS_VENDOR_SPEC) ||
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+ altsd->bNumEndpoints < 1 ||
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+ le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize) == 0)
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+ continue;
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+ /* must be isochronous */
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+ if ((get_endpoint(alts, 0)->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) !=
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+ USB_ENDPOINT_XFER_ISOC)
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+ continue;
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+ /* check direction */
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+ stream = (get_endpoint(alts, 0)->bEndpointAddress & USB_DIR_IN) ?
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+ SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK;
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+ altno = altsd->bAlternateSetting;
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+
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+ if (snd_usb_apply_interface_quirk(chip, iface_no, altno))
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+ continue;
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+
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+ /* get audio formats */
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+ switch (protocol) {
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+ default:
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+ snd_printdd(KERN_WARNING "%d:%u:%d: unknown interface protocol %#02x, assuming v1\n",
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+ dev->devnum, iface_no, altno, protocol);
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+ protocol = UAC_VERSION_1;
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+ /* fall through */
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+
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+ case UAC_VERSION_1: {
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+ struct uac1_as_header_descriptor *as =
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+ snd_usb_find_csint_desc(alts->extra, alts->extralen, NULL, UAC_AS_GENERAL);
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+
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+ if (!as) {
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+ snd_printk(KERN_ERR "%d:%u:%d : UAC_AS_GENERAL descriptor not found\n",
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+ dev->devnum, iface_no, altno);
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+ continue;
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+ }
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+
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+ if (as->bLength < sizeof(*as)) {
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+ snd_printk(KERN_ERR "%d:%u:%d : invalid UAC_AS_GENERAL desc\n",
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+ dev->devnum, iface_no, altno);
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+ continue;
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+ }
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+
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+ format = le16_to_cpu(as->wFormatTag); /* remember the format value */
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+ break;
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+ }
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+
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+ case UAC_VERSION_2: {
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+ struct uac2_input_terminal_descriptor *input_term;
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+ struct uac2_output_terminal_descriptor *output_term;
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+ struct uac2_as_header_descriptor *as =
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+ snd_usb_find_csint_desc(alts->extra, alts->extralen, NULL, UAC_AS_GENERAL);
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+
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+ if (!as) {
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+ snd_printk(KERN_ERR "%d:%u:%d : UAC_AS_GENERAL descriptor not found\n",
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+ dev->devnum, iface_no, altno);
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+ continue;
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+ }
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+
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+ if (as->bLength < sizeof(*as)) {
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+ snd_printk(KERN_ERR "%d:%u:%d : invalid UAC_AS_GENERAL desc\n",
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+ dev->devnum, iface_no, altno);
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+ continue;
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+ }
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+
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+ num_channels = as->bNrChannels;
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+ format = le32_to_cpu(as->bmFormats);
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+
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+ /* lookup the terminal associated to this interface
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+ * to extract the clock */
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+ input_term = snd_usb_find_input_terminal_descriptor(chip->ctrl_intf,
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+ as->bTerminalLink);
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+ if (input_term) {
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+ clock = input_term->bCSourceID;
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+ break;
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+ }
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+
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+ output_term = snd_usb_find_output_terminal_descriptor(chip->ctrl_intf,
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+ as->bTerminalLink);
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+ if (output_term) {
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+ clock = output_term->bCSourceID;
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+ break;
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+ }
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+
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+ snd_printk(KERN_ERR "%d:%u:%d : bogus bTerminalLink %d\n",
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+ dev->devnum, iface_no, altno, as->bTerminalLink);
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+ continue;
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+ }
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+ }
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+
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+ /* get format type */
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+ fmt = snd_usb_find_csint_desc(alts->extra, alts->extralen, NULL, UAC_FORMAT_TYPE);
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+ if (!fmt) {
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+ snd_printk(KERN_ERR "%d:%u:%d : no UAC_FORMAT_TYPE desc\n",
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+ dev->devnum, iface_no, altno);
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+ continue;
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+ }
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+ if (((protocol == UAC_VERSION_1) && (fmt->bLength < 8)) ||
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+ ((protocol == UAC_VERSION_2) && (fmt->bLength < 6))) {
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+ snd_printk(KERN_ERR "%d:%u:%d : invalid UAC_FORMAT_TYPE desc\n",
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+ dev->devnum, iface_no, altno);
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+ continue;
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+ }
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+
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+ /*
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+ * Blue Microphones workaround: The last altsetting is identical
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+ * with the previous one, except for a larger packet size, but
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+ * is actually a mislabeled two-channel setting; ignore it.
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+ */
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+ if (fmt->bNrChannels == 1 &&
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+ fmt->bSubframeSize == 2 &&
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+ altno == 2 && num == 3 &&
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+ fp && fp->altsetting == 1 && fp->channels == 1 &&
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+ fp->formats == SNDRV_PCM_FMTBIT_S16_LE &&
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+ protocol == UAC_VERSION_1 &&
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+ le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize) ==
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+ fp->maxpacksize * 2)
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+ continue;
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+
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+ fp = kzalloc(sizeof(*fp), GFP_KERNEL);
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+ if (! fp) {
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+ snd_printk(KERN_ERR "cannot malloc\n");
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+ return -ENOMEM;
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+ }
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+
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+ fp->iface = iface_no;
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+ fp->altsetting = altno;
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+ fp->altset_idx = i;
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+ fp->endpoint = get_endpoint(alts, 0)->bEndpointAddress;
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+ fp->ep_attr = get_endpoint(alts, 0)->bmAttributes;
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+ fp->datainterval = snd_usb_parse_datainterval(chip, alts);
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+ fp->maxpacksize = le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize);
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+ /* num_channels is only set for v2 interfaces */
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+ fp->channels = num_channels;
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|
+ if (snd_usb_get_speed(dev) == USB_SPEED_HIGH)
|
|
|
+ fp->maxpacksize = (((fp->maxpacksize >> 11) & 3) + 1)
|
|
|
+ * (fp->maxpacksize & 0x7ff);
|
|
|
+ fp->attributes = parse_uac_endpoint_attributes(chip, alts, protocol, iface_no);
|
|
|
+ fp->clock = clock;
|
|
|
+
|
|
|
+ /* some quirks for attributes here */
|
|
|
+
|
|
|
+ switch (chip->usb_id) {
|
|
|
+ case USB_ID(0x0a92, 0x0053): /* AudioTrak Optoplay */
|
|
|
+ /* Optoplay sets the sample rate attribute although
|
|
|
+ * it seems not supporting it in fact.
|
|
|
+ */
|
|
|
+ fp->attributes &= ~UAC_EP_CS_ATTR_SAMPLE_RATE;
|
|
|
+ break;
|
|
|
+ case USB_ID(0x041e, 0x3020): /* Creative SB Audigy 2 NX */
|
|
|
+ case USB_ID(0x0763, 0x2003): /* M-Audio Audiophile USB */
|
|
|
+ /* doesn't set the sample rate attribute, but supports it */
|
|
|
+ fp->attributes |= UAC_EP_CS_ATTR_SAMPLE_RATE;
|
|
|
+ break;
|
|
|
+ case USB_ID(0x0763, 0x2001): /* M-Audio Quattro USB */
|
|
|
+ case USB_ID(0x0763, 0x2012): /* M-Audio Fast Track Pro USB */
|
|
|
+ case USB_ID(0x047f, 0x0ca1): /* plantronics headset */
|
|
|
+ case USB_ID(0x077d, 0x07af): /* Griffin iMic (note that there is
|
|
|
+ an older model 77d:223) */
|
|
|
+ /*
|
|
|
+ * plantronics headset and Griffin iMic have set adaptive-in
|
|
|
+ * although it's really not...
|
|
|
+ */
|
|
|
+ fp->ep_attr &= ~USB_ENDPOINT_SYNCTYPE;
|
|
|
+ if (stream == SNDRV_PCM_STREAM_PLAYBACK)
|
|
|
+ fp->ep_attr |= USB_ENDPOINT_SYNC_ADAPTIVE;
|
|
|
+ else
|
|
|
+ fp->ep_attr |= USB_ENDPOINT_SYNC_SYNC;
|
|
|
+ break;
|
|
|
+ }
|
|
|
+
|
|
|
+ /* ok, let's parse further... */
|
|
|
+ if (snd_usb_parse_audio_format(chip, fp, format, fmt, stream, alts) < 0) {
|
|
|
+ kfree(fp->rate_table);
|
|
|
+ kfree(fp);
|
|
|
+ fp = NULL;
|
|
|
+ continue;
|
|
|
+ }
|
|
|
+
|
|
|
+ snd_printdd(KERN_INFO "%d:%u:%d: add audio endpoint %#x\n", dev->devnum, iface_no, altno, fp->endpoint);
|
|
|
+ err = snd_usb_add_audio_stream(chip, stream, fp);
|
|
|
+ if (err < 0) {
|
|
|
+ kfree(fp->rate_table);
|
|
|
+ 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;
|
|
|
+}
|
|
|
+
|
Daniel Mack