/* * 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; }