| /* |
| * 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 <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" |
| |
| /* |
| * 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); |
| } |
| |
| |
| /* |
| * 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_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->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; |
| } |
| |
| /* 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 list_head *p; |
| |
| for (p = fp->list.prev; p != &subs->fmt_list; p = p->prev) { |
| struct audioformat *prev; |
| prev = list_entry(p, struct audioformat, 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; |
| } |
| |
| /* |
| * 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. |
| */ |
| int snd_usb_add_audio_stream(struct snd_usb_audio *chip, |
| int stream, |
| struct audioformat *fp) |
| { |
| 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); |
| 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); |
| |
| list_add(&as->list, &chip->pcm_list); |
| chip->pcm_devs++; |
| |
| snd_usb_proc_pcm_format_add(as); |
| |
| return add_chmap(pcm, stream, &as->substream[stream]); |
| } |
| |
| 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 { |
| 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; |
| } |
| |
| /* 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 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_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; |
| unsigned int format = 0, num_channels = 0; |
| struct audioformat *fp = NULL; |
| int num, protocol, clock = 0; |
| struct uac_format_type_i_continuous_descriptor *fmt; |
| unsigned int chconfig; |
| |
| 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; |
| |
| chconfig = 0; |
| /* get audio formats */ |
| 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: { |
| 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); |
| continue; |
| } |
| |
| if (as->bLength < sizeof(*as)) { |
| dev_err(&dev->dev, |
| "%u:%d : invalid UAC_AS_GENERAL desc\n", |
| iface_no, altno); |
| continue; |
| } |
| |
| 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); |
| } |
| |
| 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) { |
| dev_err(&dev->dev, |
| "%u:%d : UAC_AS_GENERAL descriptor not found\n", |
| iface_no, altno); |
| continue; |
| } |
| |
| if (as->bLength < sizeof(*as)) { |
| dev_err(&dev->dev, |
| "%u:%d : invalid UAC_AS_GENERAL desc\n", |
| iface_no, altno); |
| continue; |
| } |
| |
| 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); |
| break; |
| } |
| |
| output_term = snd_usb_find_output_terminal_descriptor(chip->ctrl_intf, |
| as->bTerminalLink); |
| if (output_term) { |
| clock = output_term->bCSourceID; |
| break; |
| } |
| |
| dev_err(&dev->dev, |
| "%u:%d : bogus bTerminalLink %d\n", |
| 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) { |
| dev_err(&dev->dev, |
| "%u:%d : no UAC_FORMAT_TYPE desc\n", |
| iface_no, altno); |
| continue; |
| } |
| 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); |
| 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) { |
| dev_err(&dev->dev, "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->protocol = protocol; |
| fp->maxpacksize = le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize); |
| 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; |
| INIT_LIST_HEAD(&fp->list); |
| |
| /* 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) < 0) { |
| kfree(fp->rate_table); |
| kfree(fp); |
| fp = NULL; |
| continue; |
| } |
| |
| /* Create chmap */ |
| if (fp->channels != num_channels) |
| chconfig = 0; |
| fp->chmap = convert_chmap(fp->channels, chconfig, protocol); |
| |
| dev_dbg(&dev->dev, "%u:%d: add audio endpoint %#x\n", iface_no, altno, fp->endpoint); |
| err = snd_usb_add_audio_stream(chip, stream, fp); |
| if (err < 0) { |
| list_del(&fp->list); /* unlink for avoiding double-free */ |
| 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; |
| } |
| |