Commit message: ALSA: usb-audio: Fix double-free in error paths after snd_usb_add_audio_stream() call

create_fixed_stream_quirk(), snd_usb_parse_audio_interface() and
create_uaxx_quirk() functions allocate the audioformat object by themselves
and free it upon error before returning. However, once the object is linked
to a stream, it's freed again in snd_usb_audio_pcm_free(), thus it'll be
double-freed, eventually resulting in a memory corruption.

This patch fixes these failures in the error paths by unlinking the audioformat
object before freeing it.

Based on a patch by Takashi Iwai <tiwai@suse.de>

[Note for stable backports:
 this patch requires the commit 902eb7fd1e4a ('ALSA: usb-audio: Minor
 code cleanup in create_fixed_stream_quirk()')]

Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=1283358
Reported-by: Ralf Spenneberg <ralf@spenneberg.net>
Cc: <stable@vger.kernel.org> # see the note above
Signed-off-by: Vladis Dronov <vdronov@redhat.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
CVE: CVE-2016-2184
CWE: NVD-CWE-Other
Vulnerability description: The create_fixed_stream_quirk function in sound/usb/quirks.c in the snd-usb-audio driver in the Linux kernel before 4.5.1 allows physically proximate attackers to cause a denial of service (NULL pointer dereference or double free, and system crash) via a crafted endpoints value in a USB device descriptor.

Project: linux
File: quirks.c

static int create_any_midi_quirk(struct snd_usb_audio *chip,
				 struct usb_interface *intf,
				 struct usb_driver *driver,
				 const struct snd_usb_audio_quirk *quirk)
{
	return snd_usbmidi_create(chip->card, intf, &chip->midi_list, quirk);
}

Project: linux
File: quirks.c

int snd_usb_create_quirk(struct snd_usb_audio *chip,
			 struct usb_interface *iface,
			 struct usb_driver *driver,
			 const struct snd_usb_audio_quirk *quirk)
{
	typedef int (*quirk_func_t)(struct snd_usb_audio *,
				    struct usb_interface *,
				    struct usb_driver *,
				    const struct snd_usb_audio_quirk *);
	static const quirk_func_t quirk_funcs[] = {
		[QUIRK_IGNORE_INTERFACE] = ignore_interface_quirk,
		[QUIRK_COMPOSITE] = create_composite_quirk,
		[QUIRK_AUTODETECT] = create_autodetect_quirks,
		[QUIRK_MIDI_STANDARD_INTERFACE] = create_any_midi_quirk,
		[QUIRK_MIDI_FIXED_ENDPOINT] = create_any_midi_quirk,
		[QUIRK_MIDI_YAMAHA] = create_any_midi_quirk,
		[QUIRK_MIDI_ROLAND] = create_any_midi_quirk,
		[QUIRK_MIDI_MIDIMAN] = create_any_midi_quirk,
		[QUIRK_MIDI_NOVATION] = create_any_midi_quirk,
		[QUIRK_MIDI_RAW_BYTES] = create_any_midi_quirk,
		[QUIRK_MIDI_EMAGIC] = create_any_midi_quirk,
		[QUIRK_MIDI_CME] = create_any_midi_quirk,
		[QUIRK_MIDI_AKAI] = create_any_midi_quirk,
		[QUIRK_MIDI_FTDI] = create_any_midi_quirk,
		[QUIRK_MIDI_CH345] = create_any_midi_quirk,
		[QUIRK_AUDIO_STANDARD_INTERFACE] = create_standard_audio_quirk,
		[QUIRK_AUDIO_FIXED_ENDPOINT] = create_fixed_stream_quirk,
		[QUIRK_AUDIO_EDIROL_UAXX] = create_uaxx_quirk,
		[QUIRK_AUDIO_ALIGN_TRANSFER] = create_align_transfer_quirk,
		[QUIRK_AUDIO_STANDARD_MIXER] = create_standard_mixer_quirk,
	};

	if (quirk->type < QUIRK_TYPE_COUNT) {
		return quirk_funcs[quirk->type](chip, iface, driver, quirk);
	} else {
		usb_audio_err(chip, "invalid quirk type %d\n", quirk->type);
		return -ENXIO;
	}
}

Project: linux
File: quirks.c

void snd_usb_set_format_quirk(struct snd_usb_substream *subs,
			      struct audioformat *fmt)
{
	switch (subs->stream->chip->usb_id) {
	case USB_ID(0x041e, 0x3f02): /* E-Mu 0202 USB */
	case USB_ID(0x041e, 0x3f04): /* E-Mu 0404 USB */
	case USB_ID(0x041e, 0x3f0a): /* E-Mu Tracker Pre */
	case USB_ID(0x041e, 0x3f19): /* E-Mu 0204 USB */
		set_format_emu_quirk(subs, fmt);
		break;
	}
}

Project: linux
File: quirks.c

static int snd_usb_gamecon780_boot_quirk(struct usb_device *dev)
{
	/* set the initial volume and don't change; other values are either
	 * too loud or silent due to firmware bug (bko#65251)
	 */
	u8 buf[2] = { 0x74, 0xe3 };
	return snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), UAC_SET_CUR,
			USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_OUT,
			UAC_FU_VOLUME << 8, 9 << 8, buf, 2);
}

Project: linux
File: quirks.c

int snd_usb_apply_boot_quirk(struct usb_device *dev,
			     struct usb_interface *intf,
			     const struct snd_usb_audio_quirk *quirk,
			     unsigned int id)
{
	switch (id) {
	case USB_ID(0x041e, 0x3000):
		/* SB Extigy needs special boot-up sequence */
		/* if more models come, this will go to the quirk list. */
		return snd_usb_extigy_boot_quirk(dev, intf);

	case USB_ID(0x041e, 0x3020):
		/* SB Audigy 2 NX needs its own boot-up magic, too */
		return snd_usb_audigy2nx_boot_quirk(dev);

	case USB_ID(0x10f5, 0x0200):
		/* C-Media CM106 / Turtle Beach Audio Advantage Roadie */
		return snd_usb_cm106_boot_quirk(dev);

	case USB_ID(0x0d8c, 0x0102):
		/* C-Media CM6206 / CM106-Like Sound Device */
	case USB_ID(0x0ccd, 0x00b1): /* Terratec Aureon 7.1 USB */
		return snd_usb_cm6206_boot_quirk(dev);

	case USB_ID(0x0dba, 0x3000):
		/* Digidesign Mbox 2 */
		return snd_usb_mbox2_boot_quirk(dev);

	case USB_ID(0x1235, 0x0010): /* Focusrite Novation Saffire 6 USB */
	case USB_ID(0x1235, 0x0018): /* Focusrite Novation Twitch */
		return snd_usb_novation_boot_quirk(dev);

	case USB_ID(0x133e, 0x0815):
		/* Access Music VirusTI Desktop */
		return snd_usb_accessmusic_boot_quirk(dev);

	case USB_ID(0x17cc, 0x1000): /* Komplete Audio 6 */
	case USB_ID(0x17cc, 0x1010): /* Traktor Audio 6 */
	case USB_ID(0x17cc, 0x1020): /* Traktor Audio 10 */
		return snd_usb_nativeinstruments_boot_quirk(dev);
	case USB_ID(0x0763, 0x2012):  /* M-Audio Fast Track Pro USB */
		return snd_usb_fasttrackpro_boot_quirk(dev);
	case USB_ID(0x047f, 0xc010): /* Plantronics Gamecom 780 */
		return snd_usb_gamecon780_boot_quirk(dev);
	}

	return 0;
}

Project: linux
File: quirks.c

static int snd_usb_novation_boot_quirk(struct usb_device *dev)
{
	/* preemptively set up the device because otherwise the
	 * raw MIDI endpoints are not active */
	usb_set_interface(dev, 0, 1);
	return 0;
}

Project: linux
File: quirks.c

static int create_auto_pcm_quirk(struct snd_usb_audio *chip,
				 struct usb_interface *iface,
				 struct usb_driver *driver)
{
	struct usb_host_interface *alts;
	struct usb_interface_descriptor *altsd;
	struct usb_endpoint_descriptor *epd;
	struct uac1_as_header_descriptor *ashd;
	struct uac_format_type_i_discrete_descriptor *fmtd;

	/*
	 * Most Roland/Yamaha audio streaming interfaces have more or less
	 * standard descriptors, but older devices might lack descriptors, and
	 * future ones might change, so ensure that we fail silently if the
	 * interface doesn't look exactly right.
	 */

	/* must have a non-zero altsetting for streaming */
	if (iface->num_altsetting < 2)
		return -ENODEV;
	alts = &iface->altsetting[1];
	altsd = get_iface_desc(alts);

	/* must have an isochronous endpoint for streaming */
	if (altsd->bNumEndpoints < 1)
		return -ENODEV;
	epd = get_endpoint(alts, 0);
	if (!usb_endpoint_xfer_isoc(epd))
		return -ENODEV;

	/* must have format descriptors */
	ashd = snd_usb_find_csint_desc(alts->extra, alts->extralen, NULL,
				       UAC_AS_GENERAL);
	fmtd = snd_usb_find_csint_desc(alts->extra, alts->extralen, NULL,
				       UAC_FORMAT_TYPE);
	if (!ashd || ashd->bLength < 7 ||
	    !fmtd || fmtd->bLength < 8)
		return -ENODEV;

	return create_standard_audio_quirk(chip, iface, driver, NULL);
}

Project: linux
File: quirks.c

static void mbox2_setup_48_24_magic(struct usb_device *dev)
{
	u8 srate[3];
	u8 temp[12];

	/* Choose 48000Hz permanently */
	srate[0] = 0x80;
	srate[1] = 0xbb;
	srate[2] = 0x00;

	/* Send the magic! */
	snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0),
		0x01, 0x22, 0x0100, 0x0085, &temp, 0x0003);
	snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0),
		0x81, 0xa2, 0x0100, 0x0085, &srate, 0x0003);
	snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0),
		0x81, 0xa2, 0x0100, 0x0086, &srate, 0x0003);
	snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0),
		0x81, 0xa2, 0x0100, 0x0003, &srate, 0x0003);
	return;
}

Project: linux
File: stream.c

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);
}

Project: linux
File: stream.c

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);

	/*
	 * 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]);
}

Project: linux
File: quirks.c

static int fasttrackpro_skip_setting_quirk(struct snd_usb_audio *chip,
					   int iface, int altno)
{
	/* Reset ALL ifaces to 0 altsetting.
	 * Call it for every possible altsetting of every interface.
	 */
	usb_set_interface(chip->dev, iface, 0);

	/* possible configuration where both inputs and only one output is
	 *used is not supported by the current setup
	 */
	if (chip->setup & (MAUDIO_SET | MAUDIO_SET_24B)) {
		if (chip->setup & MAUDIO_SET_96K) {
			if (altno != 3 && altno != 6)
				return 1;
		} else if (chip->setup & MAUDIO_SET_DI) {
			if (iface == 4)
				return 1; /* no analog input */
			if (altno != 2 && altno != 5)
				return 1; /* enable only altsets 2 and 5 */
		} else {
			if (iface == 5)
				return 1; /* disable digialt input */
			if (altno != 2 && altno != 5)
				return 1; /* enalbe only altsets 2 and 5 */
		}
	} else {
		/* keep only 16-Bit mode */
		if (altno != 1)
			return 1;
	}

	usb_audio_dbg(chip,
		    "using altsetting %d for interface %d config %d\n",
		    altno, iface, chip->setup);
	return 0; /* keep this altsetting */
}

Project: linux
File: quirks.c

static int create_standard_mixer_quirk(struct snd_usb_audio *chip,
				       struct usb_interface *iface,
				       struct usb_driver *driver,
				       const struct snd_usb_audio_quirk *quirk)
{
	if (quirk->ifnum < 0)
		return 0;

	return snd_usb_create_mixer(chip, quirk->ifnum, 0);
}

Project: linux
File: stream.c

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;
}

Project: linux
File: quirks.c

static int create_standard_audio_quirk(struct snd_usb_audio *chip,
				       struct usb_interface *iface,
				       struct usb_driver *driver,
				       const struct snd_usb_audio_quirk *quirk)
{
	struct usb_host_interface *alts;
	struct usb_interface_descriptor *altsd;
	int err;

	if (chip->usb_id == USB_ID(0x1686, 0x00dd)) /* Zoom R16/24 */
		chip->tx_length_quirk = 1;

	alts = &iface->altsetting[0];
	altsd = get_iface_desc(alts);
	err = snd_usb_parse_audio_interface(chip, altsd->bInterfaceNumber);
	if (err < 0) {
		usb_audio_err(chip, "cannot setup if %d: error %d\n",
			   altsd->bInterfaceNumber, err);
		return err;
	}
	/* reset the current interface */
	usb_set_interface(chip->dev, altsd->bInterfaceNumber, 0);
	return 0;
}

Project: linux
File: stream.c

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;
}

Project: linux
File: quirks.c

int snd_usb_select_mode_quirk(struct snd_usb_substream *subs,
			      struct audioformat *fmt)
{
	struct usb_device *dev = subs->dev;
	int err;

	if (is_marantz_denon_dac(subs->stream->chip->usb_id)) {
		/* First switch to alt set 0, otherwise the mode switch cmd
		 * will not be accepted by the DAC
		 */
		err = usb_set_interface(dev, fmt->iface, 0);
		if (err < 0)
			return err;

		mdelay(20); /* Delay needed after setting the interface */

		switch (fmt->altsetting) {
		case 2: /* DSD mode requested */
		case 1: /* PCM mode requested */
			err = snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), 0,
					      USB_DIR_OUT|USB_TYPE_VENDOR|USB_RECIP_INTERFACE,
					      fmt->altsetting - 1, 1, NULL, 0);
			if (err < 0)
				return err;
			break;
		}
		mdelay(20);
	}
	return 0;
}

Project: linux
File: quirks.c

static int create_yamaha_midi_quirk(struct snd_usb_audio *chip,
				    struct usb_interface *iface,
				    struct usb_driver *driver,
				    struct usb_host_interface *alts)
{
	static const struct snd_usb_audio_quirk yamaha_midi_quirk = {
		.type = QUIRK_MIDI_YAMAHA
	};
	struct usb_midi_in_jack_descriptor *injd;
	struct usb_midi_out_jack_descriptor *outjd;

	/* must have some valid jack descriptors */
	injd = snd_usb_find_csint_desc(alts->extra, alts->extralen,
				       NULL, USB_MS_MIDI_IN_JACK);
	outjd = snd_usb_find_csint_desc(alts->extra, alts->extralen,
					NULL, USB_MS_MIDI_OUT_JACK);
	if (!injd && !outjd)
		return -ENODEV;
	if (injd && (injd->bLength < 5 ||
		     (injd->bJackType != USB_MS_EMBEDDED &&
		      injd->bJackType != USB_MS_EXTERNAL)))
		return -ENODEV;
	if (outjd && (outjd->bLength < 6 ||
		      (outjd->bJackType != USB_MS_EMBEDDED &&
		       outjd->bJackType != USB_MS_EXTERNAL)))
		return -ENODEV;
	return create_any_midi_quirk(chip, iface, driver, &yamaha_midi_quirk);
}

Project: linux
File: quirks.c

static int snd_usb_accessmusic_boot_quirk(struct usb_device *dev)
{
	int err, actual_length;

	/* "midi send" enable */
	static const u8 seq[] = { 0x4e, 0x73, 0x52, 0x01 };

	void *buf = kmemdup(seq, ARRAY_SIZE(seq), GFP_KERNEL);
	if (!buf)
		return -ENOMEM;
	err = usb_interrupt_msg(dev, usb_sndintpipe(dev, 0x05), buf,
			ARRAY_SIZE(seq), &actual_length, 1000);
	kfree(buf);
	if (err < 0)
		return err;

	return 0;
}

Project: linux
File: quirks.c

void snd_usb_endpoint_start_quirk(struct snd_usb_endpoint *ep)
{
	/*
	 * "Playback Design" products send bogus feedback data at the start
	 * of the stream. Ignore them.
	 */
	if (USB_ID_VENDOR(ep->chip->usb_id) == 0x23ba &&
	    ep->type == SND_USB_ENDPOINT_TYPE_SYNC)
		ep->skip_packets = 4;

	/*
	 * M-Audio Fast Track C400/C600 - when packets are not skipped, real
	 * world latency varies by approx. +/- 50 frames (at 96KHz) each time
	 * the stream is (re)started. When skipping packets 16 at endpoint
	 * start up, the real world latency is stable within +/- 1 frame (also
	 * across power cycles).
	 */
	if ((ep->chip->usb_id == USB_ID(0x0763, 0x2030) ||
	     ep->chip->usb_id == USB_ID(0x0763, 0x2031)) &&
	    ep->type == SND_USB_ENDPOINT_TYPE_DATA)
		ep->skip_packets = 16;
}

Project: linux
File: quirks.c

static int snd_usb_extigy_boot_quirk(struct usb_device *dev, struct usb_interface *intf)
{
	struct usb_host_config *config = dev->actconfig;
	int err;

	if (le16_to_cpu(get_cfg_desc(config)->wTotalLength) == EXTIGY_FIRMWARE_SIZE_OLD ||
	    le16_to_cpu(get_cfg_desc(config)->wTotalLength) == EXTIGY_FIRMWARE_SIZE_NEW) {
		dev_dbg(&dev->dev, "sending Extigy boot sequence...\n");
		/* Send message to force it to reconnect with full interface. */
		err = snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev,0),
				      0x10, 0x43, 0x0001, 0x000a, NULL, 0);
		if (err < 0)
			dev_dbg(&dev->dev, "error sending boot message: %d\n", err);
		err = usb_get_descriptor(dev, USB_DT_DEVICE, 0,
				&dev->descriptor, sizeof(dev->descriptor));
		config = dev->actconfig;
		if (err < 0)
			dev_dbg(&dev->dev, "error usb_get_descriptor: %d\n", err);
		err = usb_reset_configuration(dev);
		if (err < 0)
			dev_dbg(&dev->dev, "error usb_reset_configuration: %d\n", err);
		dev_dbg(&dev->dev, "extigy_boot: new boot length = %d\n",
			    le16_to_cpu(get_cfg_desc(config)->wTotalLength));
		return -ENODEV; /* quit this anyway */
	}
	return 0;
}

Project: linux
File: quirks.c

static int snd_usb_cm106_write_int_reg(struct usb_device *dev, int reg, u16 value)
{
	u8 buf[4];
	buf[0] = 0x20;
	buf[1] = value & 0xff;
	buf[2] = (value >> 8) & 0xff;
	buf[3] = reg;
	return snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), USB_REQ_SET_CONFIGURATION,
			       USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_ENDPOINT,
			       0, 0, &buf, 4);
}

Project: linux
File: quirks.c

static void set_format_emu_quirk(struct snd_usb_substream *subs,
				 struct audioformat *fmt)
{
	unsigned char emu_samplerate_id = 0;

	/* When capture is active
	 * sample rate shouldn't be changed
	 * by playback substream
	 */
	if (subs->direction == SNDRV_PCM_STREAM_PLAYBACK) {
		if (subs->stream->substream[SNDRV_PCM_STREAM_CAPTURE].interface != -1)
			return;
	}

	switch (fmt->rate_min) {
	case 48000:
		emu_samplerate_id = EMU_QUIRK_SR_48000HZ;
		break;
	case 88200:
		emu_samplerate_id = EMU_QUIRK_SR_88200HZ;
		break;
	case 96000:
		emu_samplerate_id = EMU_QUIRK_SR_96000HZ;
		break;
	case 176400:
		emu_samplerate_id = EMU_QUIRK_SR_176400HZ;
		break;
	case 192000:
		emu_samplerate_id = EMU_QUIRK_SR_192000HZ;
		break;
	default:
		emu_samplerate_id = EMU_QUIRK_SR_44100HZ;
		break;
	}
	snd_emuusb_set_samplerate(subs->stream->chip, emu_samplerate_id);
	subs->pkt_offset_adj = (emu_samplerate_id >= EMU_QUIRK_SR_176400HZ) ? 4 : 0;
}

Project: linux
File: quirks.c

u64 snd_usb_interface_dsd_format_quirks(struct snd_usb_audio *chip,
					struct audioformat *fp,
					unsigned int sample_bytes)
{
	/* Playback Designs */
	if (USB_ID_VENDOR(chip->usb_id) == 0x23ba) {
		switch (fp->altsetting) {
		case 1:
			fp->dsd_dop = true;
			return SNDRV_PCM_FMTBIT_DSD_U16_LE;
		case 2:
			fp->dsd_bitrev = true;
			return SNDRV_PCM_FMTBIT_DSD_U8;
		case 3:
			fp->dsd_bitrev = true;
			return SNDRV_PCM_FMTBIT_DSD_U16_LE;
		}
	}

	/* XMOS based USB DACs */
	switch (chip->usb_id) {
	case USB_ID(0x20b1, 0x3008): /* iFi Audio micro/nano iDSD */
	case USB_ID(0x20b1, 0x2008): /* Matrix Audio X-Sabre */
	case USB_ID(0x20b1, 0x300a): /* Matrix Audio Mini-i Pro */
	case USB_ID(0x22d9, 0x0416): /* OPPO HA-1 */
		if (fp->altsetting == 2)
			return SNDRV_PCM_FMTBIT_DSD_U32_BE;
		break;

	case USB_ID(0x20b1, 0x000a): /* Gustard DAC-X20U */
	case USB_ID(0x20b1, 0x2009): /* DIYINHK DSD DXD 384kHz USB to I2S/DSD */
	case USB_ID(0x20b1, 0x2023): /* JLsounds I2SoverUSB */
	case USB_ID(0x20b1, 0x3023): /* Aune X1S 32BIT/384 DSD DAC */
	case USB_ID(0x2616, 0x0106): /* PS Audio NuWave DAC */
		if (fp->altsetting == 3)
			return SNDRV_PCM_FMTBIT_DSD_U32_BE;
		break;
	default:
		break;
	}

	/* Denon/Marantz devices with USB DAC functionality */
	if (is_marantz_denon_dac(chip->usb_id)) {
		if (fp->altsetting == 2)
			return SNDRV_PCM_FMTBIT_DSD_U32_BE;
	}

	return 0;
}

Project: linux
File: stream.c

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;
}

Project: linux
File: quirks.c

static int ignore_interface_quirk(struct snd_usb_audio *chip,
				  struct usb_interface *iface,
				  struct usb_driver *driver,
				  const struct snd_usb_audio_quirk *quirk)
{
	return 0;
}

Project: linux
File: quirks.c

static int snd_usb_audigy2nx_boot_quirk(struct usb_device *dev)
{
	u8 buf = 1;

	snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0), 0x2a,
			USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_OTHER,
			0, 0, &buf, 1);
	if (buf == 0) {
		snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), 0x29,
				USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_OTHER,
				1, 2000, NULL, 0);
		return -ENODEV;
	}
	return 0;
}

Project: linux
File: quirks.c

static int snd_usb_cm6206_boot_quirk(struct usb_device *dev)
{
	int err  = 0, reg;
	int val[] = {0x2004, 0x3000, 0xf800, 0x143f, 0x0000, 0x3000};

	for (reg = 0; reg < ARRAY_SIZE(val); reg++) {
		err = snd_usb_cm106_write_int_reg(dev, reg, val[reg]);
		if (err < 0)
			return err;
	}

	return err;
}

Project: linux
File: quirks.c

static int create_autodetect_quirk(struct snd_usb_audio *chip,
				   struct usb_interface *iface,
				   struct usb_driver *driver)
{
	int err;

	err = create_auto_pcm_quirk(chip, iface, driver);
	if (err == -ENODEV)
		err = create_auto_midi_quirk(chip, iface, driver);
	return err;
}

Project: linux
File: quirks.c

static int create_composite_quirk(struct snd_usb_audio *chip,
				  struct usb_interface *iface,
				  struct usb_driver *driver,
				  const struct snd_usb_audio_quirk *quirk_comp)
{
	int probed_ifnum = get_iface_desc(iface->altsetting)->bInterfaceNumber;
	const struct snd_usb_audio_quirk *quirk;
	int err;

	for (quirk = quirk_comp->data; quirk->ifnum >= 0; ++quirk) {
		iface = usb_ifnum_to_if(chip->dev, quirk->ifnum);
		if (!iface)
			continue;
		if (quirk->ifnum != probed_ifnum &&
		    usb_interface_claimed(iface))
			continue;
		err = snd_usb_create_quirk(chip, iface, driver, quirk);
		if (err < 0)
			return err;
	}

	for (quirk = quirk_comp->data; quirk->ifnum >= 0; ++quirk) {
		iface = usb_ifnum_to_if(chip->dev, quirk->ifnum);
		if (!iface)
			continue;
		if (quirk->ifnum != probed_ifnum &&
		    !usb_interface_claimed(iface))
			usb_driver_claim_interface(driver, iface, (void *)-1L);
	}

	return 0;
}

Project: linux
File: quirks.c

int snd_usb_is_big_endian_format(struct snd_usb_audio *chip, struct audioformat *fp)
{
	/* it depends on altsetting whether the device is big-endian or not */
	switch (chip->usb_id) {
	case USB_ID(0x0763, 0x2001): /* M-Audio Quattro: captured data only */
		if (fp->altsetting == 2 || fp->altsetting == 3 ||
			fp->altsetting == 5 || fp->altsetting == 6)
			return 1;
		break;
	case USB_ID(0x0763, 0x2003): /* M-Audio Audiophile USB */
		if (chip->setup == 0x00 ||
			fp->altsetting == 1 || fp->altsetting == 2 ||
			fp->altsetting == 3)
			return 1;
		break;
	case USB_ID(0x0763, 0x2012): /* M-Audio Fast Track Pro */
		if (fp->altsetting == 2 || fp->altsetting == 3 ||
			fp->altsetting == 5 || fp->altsetting == 6)
			return 1;
		break;
	}
	return 0;
}

Project: linux
File: quirks.c

static int create_uaxx_quirk(struct snd_usb_audio *chip,
			     struct usb_interface *iface,
			     struct usb_driver *driver,
			     const struct snd_usb_audio_quirk *quirk)
{
	static const struct audioformat ua_format = {
		.formats = SNDRV_PCM_FMTBIT_S24_3LE,
		.channels = 2,
		.fmt_type = UAC_FORMAT_TYPE_I,
		.altsetting = 1,
		.altset_idx = 1,
		.rates = SNDRV_PCM_RATE_CONTINUOUS,
	};
	struct usb_host_interface *alts;
	struct usb_interface_descriptor *altsd;
	struct audioformat *fp;
	int stream, err;

	/* both PCM and MIDI interfaces have 2 or more altsettings */
	if (iface->num_altsetting < 2)
		return -ENXIO;
	alts = &iface->altsetting[1];
	altsd = get_iface_desc(alts);

	if (altsd->bNumEndpoints == 2) {
		static const struct snd_usb_midi_endpoint_info ua700_ep = {
			.out_cables = 0x0003,
			.in_cables  = 0x0003
		};
		static const struct snd_usb_audio_quirk ua700_quirk = {
			.type = QUIRK_MIDI_FIXED_ENDPOINT,
			.data = &ua700_ep
		};
		static const struct snd_usb_midi_endpoint_info uaxx_ep = {
			.out_cables = 0x0001,
			.in_cables  = 0x0001
		};
		static const struct snd_usb_audio_quirk uaxx_quirk = {
			.type = QUIRK_MIDI_FIXED_ENDPOINT,
			.data = &uaxx_ep
		};
		const struct snd_usb_audio_quirk *quirk =
			chip->usb_id == USB_ID(0x0582, 0x002b)
			? &ua700_quirk : &uaxx_quirk;
		return __snd_usbmidi_create(chip->card, iface,
					  &chip->midi_list, quirk,
					  chip->usb_id);
	}

	if (altsd->bNumEndpoints != 1)
		return -ENXIO;

	fp = kmemdup(&ua_format, sizeof(*fp), GFP_KERNEL);
	if (!fp)
		return -ENOMEM;

	fp->iface = altsd->bInterfaceNumber;
	fp->endpoint = get_endpoint(alts, 0)->bEndpointAddress;
	fp->ep_attr = get_endpoint(alts, 0)->bmAttributes;
	fp->datainterval = 0;
	fp->maxpacksize = le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize);
	INIT_LIST_HEAD(&fp->list);

	switch (fp->maxpacksize) {
	case 0x120:
		fp->rate_max = fp->rate_min = 44100;
		break;
	case 0x138:
	case 0x140:
		fp->rate_max = fp->rate_min = 48000;
		break;
	case 0x258:
	case 0x260:
		fp->rate_max = fp->rate_min = 96000;
		break;
	default:
		usb_audio_err(chip, "unknown sample rate\n");
		kfree(fp);
		return -ENXIO;
	}

	stream = (fp->endpoint & USB_DIR_IN)
		? SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK;
	err = snd_usb_add_audio_stream(chip, stream, fp);
	if (err < 0) {
		list_del(&fp->list); /* unlink for avoiding double-free */
		kfree(fp);
		return err;
	}
	usb_set_interface(chip->dev, fp->iface, 0);
	return 0;
}

Project: linux
File: quirks.c

bool snd_usb_get_sample_rate_quirk(struct snd_usb_audio *chip)
{
	/* devices which do not support reading the sample rate. */
	switch (chip->usb_id) {
	case USB_ID(0x045E, 0x075D): /* MS Lifecam Cinema  */
	case USB_ID(0x045E, 0x076D): /* MS Lifecam HD-5000 */
	case USB_ID(0x045E, 0x076E): /* MS Lifecam HD-5001 */
	case USB_ID(0x045E, 0x076F): /* MS Lifecam HD-6000 */
	case USB_ID(0x045E, 0x0772): /* MS Lifecam Studio */
	case USB_ID(0x045E, 0x0779): /* MS Lifecam HD-3000 */
	case USB_ID(0x047F, 0xAA05): /* Plantronics DA45 */
	case USB_ID(0x04D8, 0xFEEA): /* Benchmark DAC1 Pre */
	case USB_ID(0x074D, 0x3553): /* Outlaw RR2150 (Micronas UAC3553B) */
	case USB_ID(0x21B4, 0x0081): /* AudioQuest DragonFly */
		return true;
	}
	return false;
}

Project: linux
File: stream.c

	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;
}

Project: linux
File: quirks.c

static int create_roland_midi_quirk(struct snd_usb_audio *chip,
				    struct usb_interface *iface,
				    struct usb_driver *driver,
				    struct usb_host_interface *alts)
{
	static const struct snd_usb_audio_quirk roland_midi_quirk = {
		.type = QUIRK_MIDI_ROLAND
	};
	u8 *roland_desc = NULL;

	/* might have a vendor-specific descriptor <06 24 F1 02 ...> */
	for (;;) {
		roland_desc = snd_usb_find_csint_desc(alts->extra,
						      alts->extralen,
						      roland_desc, 0xf1);
		if (!roland_desc)
			return -ENODEV;
		if (roland_desc[0] < 6 || roland_desc[3] != 2)
			continue;
		return create_any_midi_quirk(chip, iface, driver,
					     &roland_midi_quirk);
	}
}

Project: linux
File: quirks.c

static int create_fixed_stream_quirk(struct snd_usb_audio *chip,
				     struct usb_interface *iface,
				     struct usb_driver *driver,
				     const struct snd_usb_audio_quirk *quirk)
{
	struct audioformat *fp;
	struct usb_host_interface *alts;
	struct usb_interface_descriptor *altsd;
	int stream, err;
	unsigned *rate_table = NULL;

	fp = kmemdup(quirk->data, sizeof(*fp), GFP_KERNEL);
	if (!fp) {
		usb_audio_err(chip, "cannot memdup\n");
		return -ENOMEM;
	}
	INIT_LIST_HEAD(&fp->list);
	if (fp->nr_rates > MAX_NR_RATES) {
		kfree(fp);
		return -EINVAL;
	}
	if (fp->nr_rates > 0) {
		rate_table = kmemdup(fp->rate_table,
				     sizeof(int) * fp->nr_rates, GFP_KERNEL);
		if (!rate_table) {
			kfree(fp);
			return -ENOMEM;
		}
		fp->rate_table = rate_table;
	}

	stream = (fp->endpoint & USB_DIR_IN)
		? SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK;
	err = snd_usb_add_audio_stream(chip, stream, fp);
	if (err < 0)
		goto error;
	if (fp->iface != get_iface_desc(&iface->altsetting[0])->bInterfaceNumber ||
	    fp->altset_idx >= iface->num_altsetting) {
		err = -EINVAL;
		goto error;
	}
	alts = &iface->altsetting[fp->altset_idx];
	altsd = get_iface_desc(alts);
	if (altsd->bNumEndpoints < 1) {
		err = -EINVAL;
		goto error;
	}

	fp->protocol = altsd->bInterfaceProtocol;

	if (fp->datainterval == 0)
		fp->datainterval = snd_usb_parse_datainterval(chip, alts);
	if (fp->maxpacksize == 0)
		fp->maxpacksize = le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize);
	usb_set_interface(chip->dev, fp->iface, 0);
	snd_usb_init_pitch(chip, fp->iface, alts, fp);
	snd_usb_init_sample_rate(chip, fp->iface, alts, fp, fp->rate_max);
	return 0;

 error:
	list_del(&fp->list); /* unlink for avoiding double-free */
	kfree(fp);
	kfree(rate_table);
	return err;
}

Project: linux
File: stream.c

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;
}

Project: linux
File: quirks.c

static int create_auto_midi_quirk(struct snd_usb_audio *chip,
				  struct usb_interface *iface,
				  struct usb_driver *driver)
{
	struct usb_host_interface *alts;
	struct usb_interface_descriptor *altsd;
	struct usb_endpoint_descriptor *epd;
	int err;

	alts = &iface->altsetting[0];
	altsd = get_iface_desc(alts);

	/* must have at least one bulk/interrupt endpoint for streaming */
	if (altsd->bNumEndpoints < 1)
		return -ENODEV;
	epd = get_endpoint(alts, 0);
	if (!usb_endpoint_xfer_bulk(epd) &&
	    !usb_endpoint_xfer_int(epd))
		return -ENODEV;

	switch (USB_ID_VENDOR(chip->usb_id)) {
	case 0x0499: /* Yamaha */
		err = create_yamaha_midi_quirk(chip, iface, driver, alts);
		if (err != -ENODEV)
			return err;
		break;
	case 0x0582: /* Roland */
		err = create_roland_midi_quirk(chip, iface, driver, alts);
		if (err != -ENODEV)
			return err;
		break;
	}

	return create_std_midi_quirk(chip, iface, driver, alts);
}

Project: linux
File: quirks.c

static int snd_usb_nativeinstruments_boot_quirk(struct usb_device *dev)
{
	int ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
				  0xaf, USB_TYPE_VENDOR | USB_RECIP_DEVICE,
				  1, 0, NULL, 0, 1000);

	if (ret < 0)
		return ret;

	usb_reset_device(dev);

	/* return -EAGAIN, so the creation of an audio interface for this
	 * temporary device is aborted. The device will reconnect with a
	 * new product ID */
	return -EAGAIN;
}

Project: linux
File: stream.c

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;
}

Project: linux
File: quirks.c

void snd_usb_ctl_msg_quirk(struct usb_device *dev, unsigned int pipe,
			   __u8 request, __u8 requesttype, __u16 value,
			   __u16 index, void *data, __u16 size)
{
	struct snd_usb_audio *chip = dev_get_drvdata(&dev->dev);

	if (!chip)
		return;
	/*
	 * "Playback Design" products need a 20ms delay after each
	 * class compliant request
	 */
	if (USB_ID_VENDOR(chip->usb_id) == 0x23ba &&
	    (requesttype & USB_TYPE_MASK) == USB_TYPE_CLASS)
		mdelay(20);

	/*
	 * "TEAC Corp." products need a 20ms delay after each
	 * class compliant request
	 */
	if (USB_ID_VENDOR(chip->usb_id) == 0x0644 &&
	    (requesttype & USB_TYPE_MASK) == USB_TYPE_CLASS)
		mdelay(20);

	/* Marantz/Denon devices with USB DAC functionality need a delay
	 * after each class compliant request
	 */
	if (is_marantz_denon_dac(chip->usb_id)
	    && (requesttype & USB_TYPE_MASK) == USB_TYPE_CLASS)
		mdelay(20);

	/* Zoom R16/24 needs a tiny delay here, otherwise requests like
	 * get/set frequency return as failed despite actually succeeding.
	 */
	if (chip->usb_id == USB_ID(0x1686, 0x00dd) &&
	    (requesttype & USB_TYPE_MASK) == USB_TYPE_CLASS)
		mdelay(1);
}

Project: linux
File: stream.c

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;
}

Project: linux
File: stream.c

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;
}

Project: linux
File: stream.c

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;
}

Project: linux
File: quirks.c

static int quattro_skip_setting_quirk(struct snd_usb_audio *chip,
				      int iface, int altno)
{
	/* Reset ALL ifaces to 0 altsetting.
	 * Call it for every possible altsetting of every interface.
	 */
	usb_set_interface(chip->dev, iface, 0);
	if (chip->setup & MAUDIO_SET) {
		if (chip->setup & MAUDIO_SET_COMPATIBLE) {
			if (iface != 1 && iface != 2)
				return 1; /* skip all interfaces but 1 and 2 */
		} else {
			unsigned int mask;
			if (iface == 1 || iface == 2)
				return 1; /* skip interfaces 1 and 2 */
			if ((chip->setup & MAUDIO_SET_96K) && altno != 1)
				return 1; /* skip this altsetting */
			mask = chip->setup & MAUDIO_SET_MASK;
			if (mask == MAUDIO_SET_24B_48K_DI && altno != 2)
				return 1; /* skip this altsetting */
			if (mask == MAUDIO_SET_24B_48K_NOTDI && altno != 3)
				return 1; /* skip this altsetting */
			if (mask == MAUDIO_SET_16B_48K_NOTDI && altno != 4)
				return 1; /* skip this altsetting */
		}
	}
	usb_audio_dbg(chip,
		    "using altsetting %d for interface %d config %d\n",
		    altno, iface, chip->setup);
	return 0; /* keep this altsetting */
}

Project: linux
File: quirks.c

int snd_usb_apply_interface_quirk(struct snd_usb_audio *chip,
				  int iface,
				  int altno)
{
	/* audiophile usb: skip altsets incompatible with device_setup */
	if (chip->usb_id == USB_ID(0x0763, 0x2003))
		return audiophile_skip_setting_quirk(chip, iface, altno);
	/* quattro usb: skip altsets incompatible with device_setup */
	if (chip->usb_id == USB_ID(0x0763, 0x2001))
		return quattro_skip_setting_quirk(chip, iface, altno);
	/* fasttrackpro usb: skip altsets incompatible with device_setup */
	if (chip->usb_id == USB_ID(0x0763, 0x2012))
		return fasttrackpro_skip_setting_quirk(chip, iface, altno);

	return 0;
}

Project: linux
File: stream.c

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);
}

Project: linux
File: quirks.c

static bool is_marantz_denon_dac(unsigned int id)
{
	switch (id) {
	case USB_ID(0x154e, 0x1003): /* Denon DA-300USB */
	case USB_ID(0x154e, 0x3005): /* Marantz HD-DAC1 */
	case USB_ID(0x154e, 0x3006): /* Marantz SA-14S1 */
		return true;
	}
	return false;
}

Project: linux
File: quirks.c

static int create_align_transfer_quirk(struct snd_usb_audio *chip,
				       struct usb_interface *iface,
				       struct usb_driver *driver,
				       const struct snd_usb_audio_quirk *quirk)
{
	chip->txfr_quirk = 1;
	return 1;	/* Continue with creating streams and mixer */
}

Project: linux
File: quirks.c

static int snd_usb_mbox2_boot_quirk(struct usb_device *dev)
{
	struct usb_host_config *config = dev->actconfig;
	int err;
	u8 bootresponse[0x12];
	int fwsize;
	int count;

	fwsize = le16_to_cpu(get_cfg_desc(config)->wTotalLength);

	if (fwsize != MBOX2_FIRMWARE_SIZE) {
		dev_err(&dev->dev, "Invalid firmware size=%d.\n", fwsize);
		return -ENODEV;
	}

	dev_dbg(&dev->dev, "Sending Digidesign Mbox 2 boot sequence...\n");

	count = 0;
	bootresponse[0] = MBOX2_BOOT_LOADING;
	while ((bootresponse[0] == MBOX2_BOOT_LOADING) && (count < 10)) {
		msleep(500); /* 0.5 second delay */
		snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0),
			/* Control magic - load onboard firmware */
			0x85, 0xc0, 0x0001, 0x0000, &bootresponse, 0x0012);
		if (bootresponse[0] == MBOX2_BOOT_READY)
			break;
		dev_dbg(&dev->dev, "device not ready, resending boot sequence...\n");
		count++;
	}

	if (bootresponse[0] != MBOX2_BOOT_READY) {
		dev_err(&dev->dev, "Unknown bootresponse=%d, or timed out, ignoring device.\n", bootresponse[0]);
		return -ENODEV;
	}

	dev_dbg(&dev->dev, "device initialised!\n");

	err = usb_get_descriptor(dev, USB_DT_DEVICE, 0,
		&dev->descriptor, sizeof(dev->descriptor));
	config = dev->actconfig;
	if (err < 0)
		dev_dbg(&dev->dev, "error usb_get_descriptor: %d\n", err);

	err = usb_reset_configuration(dev);
	if (err < 0)
		dev_dbg(&dev->dev, "error usb_reset_configuration: %d\n", err);
	dev_dbg(&dev->dev, "mbox2_boot: new boot length = %d\n",
		le16_to_cpu(get_cfg_desc(config)->wTotalLength));

	mbox2_setup_48_24_magic(dev);

	dev_info(&dev->dev, "Digidesign Mbox 2: 24bit 48kHz");

	return 0; /* Successful boot */
}

Project: linux
File: quirks.c

static int create_std_midi_quirk(struct snd_usb_audio *chip,
				 struct usb_interface *iface,
				 struct usb_driver *driver,
				 struct usb_host_interface *alts)
{
	struct usb_ms_header_descriptor *mshd;
	struct usb_ms_endpoint_descriptor *msepd;

	/* must have the MIDIStreaming interface header descriptor*/
	mshd = (struct usb_ms_header_descriptor *)alts->extra;
	if (alts->extralen < 7 ||
	    mshd->bLength < 7 ||
	    mshd->bDescriptorType != USB_DT_CS_INTERFACE ||
	    mshd->bDescriptorSubtype != USB_MS_HEADER)
		return -ENODEV;
	/* must have the MIDIStreaming endpoint descriptor*/
	msepd = (struct usb_ms_endpoint_descriptor *)alts->endpoint[0].extra;
	if (alts->endpoint[0].extralen < 4 ||
	    msepd->bLength < 4 ||
	    msepd->bDescriptorType != USB_DT_CS_ENDPOINT ||
	    msepd->bDescriptorSubtype != UAC_MS_GENERAL ||
	    msepd->bNumEmbMIDIJack < 1 ||
	    msepd->bNumEmbMIDIJack > 16)
		return -ENODEV;

	return create_any_midi_quirk(chip, iface, driver, NULL);
}

Project: linux
File: quirks.c

void snd_usb_set_interface_quirk(struct usb_device *dev)
{
	struct snd_usb_audio *chip = dev_get_drvdata(&dev->dev);

	if (!chip)
		return;
	/*
	 * "Playback Design" products need a 50ms delay after setting the
	 * USB interface.
	 */
	switch (USB_ID_VENDOR(chip->usb_id)) {
	case 0x23ba: /* Playback Design */
	case 0x0644: /* TEAC Corp. */
		mdelay(50);
		break;
	}
}

Project: linux
File: quirks.c

static int create_autodetect_quirks(struct snd_usb_audio *chip,
				    struct usb_interface *iface,
				    struct usb_driver *driver,
				    const struct snd_usb_audio_quirk *quirk)
{
	int probed_ifnum = get_iface_desc(iface->altsetting)->bInterfaceNumber;
	int ifcount, ifnum, err;

	err = create_autodetect_quirk(chip, iface, driver);
	if (err < 0)
		return err;

	/*
	 * ALSA PCM playback/capture devices cannot be registered in two steps,
	 * so we have to claim the other corresponding interface here.
	 */
	ifcount = chip->dev->actconfig->desc.bNumInterfaces;
	for (ifnum = 0; ifnum < ifcount; ifnum++) {
		if (ifnum == probed_ifnum || quirk->ifnum >= 0)
			continue;
		iface = usb_ifnum_to_if(chip->dev, ifnum);
		if (!iface ||
		    usb_interface_claimed(iface) ||
		    get_iface_desc(iface->altsetting)->bInterfaceClass !=
							USB_CLASS_VENDOR_SPEC)
			continue;

		err = create_autodetect_quirk(chip, iface, driver);
		if (err >= 0)
			usb_driver_claim_interface(driver, iface, (void *)-1L);
	}

	return 0;
}

Project: linux
File: stream.c

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->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;
}

Project: linux
File: stream.c

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);
	}
}

Project: linux
File: stream.c

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;
}

Project: linux
File: quirks.c

static int audiophile_skip_setting_quirk(struct snd_usb_audio *chip,
					 int iface,
					 int altno)
{
	/* Reset ALL ifaces to 0 altsetting.
	 * Call it for every possible altsetting of every interface.
	 */
	usb_set_interface(chip->dev, iface, 0);

	if (chip->setup & MAUDIO_SET) {
		unsigned int mask;
		if ((chip->setup & MAUDIO_SET_DTS) && altno != 6)
			return 1; /* skip this altsetting */
		if ((chip->setup & MAUDIO_SET_96K) && altno != 1)
			return 1; /* skip this altsetting */
		mask = chip->setup & MAUDIO_SET_MASK;
		if (mask == MAUDIO_SET_24B_48K_DI && altno != 2)
			return 1; /* skip this altsetting */
		if (mask == MAUDIO_SET_24B_48K_NOTDI && altno != 3)
			return 1; /* skip this altsetting */
		if (mask == MAUDIO_SET_16B_48K_DI && altno != 4)
			return 1; /* skip this altsetting */
		if (mask == MAUDIO_SET_16B_48K_NOTDI && altno != 5)
			return 1; /* skip this altsetting */
	}

	return 0; /* keep this altsetting */
}

Project: linux
File: quirks.c

static int snd_usb_cm106_boot_quirk(struct usb_device *dev)
{
	/*
	 * Enable line-out driver mode, set headphone source to front
	 * channels, enable stereo mic.
	 */
	return snd_usb_cm106_write_int_reg(dev, 2, 0x8004);
}

Project: linux
File: quirks.c

static int snd_usb_fasttrackpro_boot_quirk(struct usb_device *dev)
{
	int err;

	if (dev->actconfig->desc.bConfigurationValue == 1) {
		dev_info(&dev->dev,
			   "Fast Track Pro switching to config #2\n");
		/* This function has to be available by the usb core module.
		 * if it is not avialable the boot quirk has to be left out
		 * and the configuration has to be set by udev or hotplug
		 * rules
		 */
		err = usb_driver_set_configuration(dev, 2);
		if (err < 0)
			dev_dbg(&dev->dev,
				"error usb_driver_set_configuration: %d\n",
				err);
		/* Always return an error, so that we stop creating a device
		   that will just be destroyed and recreated with a new
		   configuration */
		return -ENODEV;
	} else
		dev_info(&dev->dev, "Fast Track Pro config OK\n");

	return 0;
}