| /* |
| * 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 <sound/core.h> |
| #include <sound/pcm.h> |
| |
| #include "usbaudio.h" |
| #include "card.h" |
| #include "proc.h" |
| #include "quirks.h" |
| #include "endpoint.h" |
| #include "urb.h" |
| #include "pcm.h" |
| #include "helper.h" |
| #include "format.h" |
| #include "clock.h" |
| |
| /* |
| * free a substream |
| */ |
| static void free_substream(struct snd_usb_substream *subs) |
| { |
| struct list_head *p, *n; |
| |
| if (!subs->num_formats) |
| return; /* not initialized */ |
| list_for_each_safe(p, n, &subs->fmt_list) { |
| struct audioformat *fp = list_entry(p, struct audioformat, list); |
| kfree(fp->rate_table); |
| kfree(fp); |
| } |
| kfree(subs->rate_list.list); |
| } |
| |
| |
| /* |
| * 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); |
| } |
| } |
| |
| |
| /* |
| * 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. |
| */ |
| int snd_usb_add_audio_endpoint(struct snd_usb_audio *chip, int stream, struct audioformat *fp) |
| { |
| struct list_head *p; |
| struct snd_usb_stream *as; |
| struct snd_usb_substream *subs; |
| struct snd_pcm *pcm; |
| int err; |
| |
| list_for_each(p, &chip->pcm_list) { |
| as = list_entry(p, struct snd_usb_stream, list); |
| if (as->fmt_type != fp->fmt_type) |
| continue; |
| subs = &as->substream[stream]; |
| if (!subs->endpoint) |
| continue; |
| if (subs->endpoint == 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(p, &chip->pcm_list) { |
| as = list_entry(p, struct snd_usb_stream, list); |
| if (as->fmt_type != fp->fmt_type) |
| continue; |
| subs = &as->substream[stream]; |
| if (subs->endpoint) |
| continue; |
| err = snd_pcm_new_stream(as->pcm, stream, 1); |
| if (err < 0) |
| return err; |
| snd_usb_init_substream(as, stream, fp); |
| return 0; |
| } |
| |
| /* 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); |
| |
| list_add(&as->list, &chip->pcm_list); |
| chip->pcm_devs++; |
| |
| snd_usb_proc_pcm_format_add(as); |
| |
| return 0; |
| } |
| |
| 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 (!csep || csep->bLength < 7 || |
| csep->bDescriptorSubtype != UAC_EP_GENERAL) { |
| snd_printk(KERN_WARNING "%d:%u:%d : no or invalid" |
| " class specific endpoint descriptor\n", |
| chip->dev->devnum, iface_no, |
| altsd->bAlternateSetting); |
| return 0; |
| } |
| |
| if (protocol == UAC_VERSION_1) { |
| attributes = csep->bmAttributes; |
| } else { |
| 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; |
| } |
| |
| return attributes; |
| } |
| |
| static struct uac2_input_terminal_descriptor * |
| 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 struct uac2_output_terminal_descriptor * |
| snd_usb_find_output_terminal_descriptor(struct usb_host_interface *ctrl_iface, |
| int terminal_id) |
| { |
| 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; |
| } |
| |
| int snd_usb_parse_audio_endpoints(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; |
| int format = 0, num_channels = 0; |
| struct audioformat *fp = NULL; |
| int num, protocol, clock = 0; |
| struct uac_format_type_i_continuous_descriptor *fmt; |
| |
| 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->bInterfaceClass != USB_CLASS_VENDOR_SPEC) || |
| (altsd->bInterfaceSubClass != USB_SUBCLASS_AUDIOSTREAMING && |
| altsd->bInterfaceSubClass != USB_SUBCLASS_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; |
| |
| /* get audio formats */ |
| switch (protocol) { |
| default: |
| snd_printdd(KERN_WARNING "%d:%u:%d: unknown interface protocol %#02x, assuming v1\n", |
| dev->devnum, iface_no, altno, protocol); |
| protocol = UAC_VERSION_1; |
| /* fall through */ |
| |
| case UAC_VERSION_1: { |
| struct uac1_as_header_descriptor *as = |
| snd_usb_find_csint_desc(alts->extra, alts->extralen, NULL, UAC_AS_GENERAL); |
| |
| if (!as) { |
| snd_printk(KERN_ERR "%d:%u:%d : UAC_AS_GENERAL descriptor not found\n", |
| dev->devnum, iface_no, altno); |
| continue; |
| } |
| |
| if (as->bLength < sizeof(*as)) { |
| snd_printk(KERN_ERR "%d:%u:%d : invalid UAC_AS_GENERAL desc\n", |
| dev->devnum, iface_no, altno); |
| continue; |
| } |
| |
| format = le16_to_cpu(as->wFormatTag); /* remember the format value */ |
| break; |
| } |
| |
| case 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) { |
| snd_printk(KERN_ERR "%d:%u:%d : UAC_AS_GENERAL descriptor not found\n", |
| dev->devnum, iface_no, altno); |
| continue; |
| } |
| |
| if (as->bLength < sizeof(*as)) { |
| snd_printk(KERN_ERR "%d:%u:%d : invalid UAC_AS_GENERAL desc\n", |
| dev->devnum, iface_no, altno); |
| continue; |
| } |
| |
| num_channels = as->bNrChannels; |
| format = le32_to_cpu(as->bmFormats); |
| |
| /* 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; |
| break; |
| } |
| |
| output_term = snd_usb_find_output_terminal_descriptor(chip->ctrl_intf, |
| as->bTerminalLink); |
| if (output_term) { |
| clock = output_term->bCSourceID; |
| break; |
| } |
| |
| snd_printk(KERN_ERR "%d:%u:%d : bogus bTerminalLink %d\n", |
| dev->devnum, iface_no, altno, as->bTerminalLink); |
| continue; |
| } |
| } |
| |
| /* get format type */ |
| fmt = snd_usb_find_csint_desc(alts->extra, alts->extralen, NULL, UAC_FORMAT_TYPE); |
| if (!fmt) { |
| snd_printk(KERN_ERR "%d:%u:%d : no UAC_FORMAT_TYPE desc\n", |
| dev->devnum, iface_no, altno); |
| continue; |
| } |
| if (((protocol == UAC_VERSION_1) && (fmt->bLength < 8)) || |
| ((protocol == UAC_VERSION_2) && (fmt->bLength < 6))) { |
| snd_printk(KERN_ERR "%d:%u:%d : invalid UAC_FORMAT_TYPE desc\n", |
| dev->devnum, iface_no, altno); |
| continue; |
| } |
| |
| /* |
| * 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. |
| */ |
| if (fmt->bNrChannels == 1 && |
| fmt->bSubframeSize == 2 && |
| 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) |
| continue; |
| |
| fp = kzalloc(sizeof(*fp), GFP_KERNEL); |
| if (! fp) { |
| snd_printk(KERN_ERR "cannot malloc\n"); |
| return -ENOMEM; |
| } |
| |
| fp->iface = iface_no; |
| fp->altsetting = altno; |
| fp->altset_idx = i; |
| fp->endpoint = get_endpoint(alts, 0)->bEndpointAddress; |
| fp->ep_attr = get_endpoint(alts, 0)->bmAttributes; |
| fp->datainterval = snd_usb_parse_datainterval(chip, alts); |
| fp->maxpacksize = le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize); |
| /* num_channels is only set for v2 interfaces */ |
| fp->channels = num_channels; |
| 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(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_endpoint(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; |
| } |
| |