[GitHub/mt8127/android_kernel_alcatel_ttab.git] / sound / usb / quirks.c

/*
 *   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 <sound/core.h>
#include <sound/info.h>
#include <sound/pcm.h>

#include "usbaudio.h"
#include "card.h"
#include "mixer.h"
#include "mixer_quirks.h"
#include "midi.h"
#include "quirks.h"
#include "helper.h"
#include "endpoint.h"
#include "pcm.h"
#include "clock.h"

/*
 * handle the quirks for the contained interfaces
 */
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)
{
	int probed_ifnum = get_iface_desc(iface->altsetting)->bInterfaceNumber;
	int err;

	for (quirk = quirk->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;
		if (quirk->ifnum != probed_ifnum)
			usb_driver_claim_interface(driver, iface, (void *)-1L);
	}
	return 0;
}

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;
}


/*
 * Allow alignment on audio sub-slot (channel samples) rather than
 * on audio slots (audio frames)
 */
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 */
}

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);
}

/*
 * create a stream for an interface with proper descriptors
 */
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;

	alts = &iface->altsetting[0];
	altsd = get_iface_desc(alts);
	err = snd_usb_parse_audio_endpoints(chip, altsd->bInterfaceNumber);
	if (err < 0) {
		snd_printk(KERN_ERR "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;
}

/*
 * create a stream for an endpoint/altsetting without proper descriptors
 */
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;
	int stream, err;
	unsigned *rate_table = NULL;

	fp = kmemdup(quirk->data, sizeof(*fp), GFP_KERNEL);
	if (! fp) {
		snd_printk(KERN_ERR "cannot memdup\n");
		return -ENOMEM;
	}
	if (fp->nr_rates > 0) {
		rate_table = kmalloc(sizeof(int) * fp->nr_rates, GFP_KERNEL);
		if (!rate_table) {
			kfree(fp);
			return -ENOMEM;
		}
		memcpy(rate_table, fp->rate_table, sizeof(int) * fp->nr_rates);
		fp->rate_table = rate_table;
	}

	stream = (fp->endpoint & USB_DIR_IN)
		? SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK;
	err = snd_usb_add_audio_endpoint(chip, stream, fp);
	if (err < 0) {
		kfree(fp);
		kfree(rate_table);
		return err;
	}
	if (fp->iface != get_iface_desc(&iface->altsetting[0])->bInterfaceNumber ||
	    fp->altset_idx >= iface->num_altsetting) {
		kfree(fp);
		kfree(rate_table);
		return -EINVAL;
	}
	alts = &iface->altsetting[fp->altset_idx];
	fp->datainterval = snd_usb_parse_datainterval(chip, alts);
	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;
}

/*
 * Create a stream for an Edirol UA-700/UA-25/UA-4FX interface.  
 * The only way to detect the sample rate is by looking at wMaxPacketSize.
 */
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);
	}

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

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

	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);

	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:
		snd_printk(KERN_ERR "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_endpoint(chip, stream, fp);
	if (err < 0) {
		kfree(fp);
		return err;
	}
	usb_set_interface(chip->dev, fp->iface, 0);
	return 0;
}

/*
 * audio-interface quirks
 *
 * returns zero if no standard audio/MIDI parsing is needed.
 * returns a positive value if standard audio/midi interfaces are parsed
 * after this.
 * returns a negative value at error.
 */
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_MIDI_STANDARD_INTERFACE] = create_any_midi_quirk,
		[QUIRK_MIDI_FIXED_ENDPOINT] = create_any_midi_quirk,
		[QUIRK_MIDI_YAMAHA] = 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_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
	};

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

/*
 * boot quirks
 */

#define EXTIGY_FIRMWARE_SIZE_OLD 794
#define EXTIGY_FIRMWARE_SIZE_NEW 483

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) {
		snd_printdd("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, 1000);
		if (err < 0) snd_printdd("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) snd_printdd("error usb_get_descriptor: %d\n", err);
		err = usb_reset_configuration(dev);
		if (err < 0) snd_printdd("error usb_reset_configuration: %d\n", err);
		snd_printdd("extigy_boot: new boot length = %d\n",
			    le16_to_cpu(get_cfg_desc(config)->wTotalLength));
		return -ENODEV; /* quit this anyway */
	}
	return 0;
}

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, 1000);
	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, 1000);
		return -ENODEV;
	}
	return 0;
}

/*
 * C-Media CM106/CM106+ have four 16-bit internal registers that are nicely
 * documented in the device's data sheet.
 */
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, 1000);
}

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);
}

/*
 * C-Media CM6206 is based on CM106 with two additional
 * registers that are not documented in the data sheet.
 * Values here are chosen based on sniffing USB traffic
 * under Windows.
 */
static int snd_usb_cm6206_boot_quirk(struct usb_device *dev)
{
	int err, reg;
	int val[] = {0x200c, 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;
}

/*
 * This call will put the synth in "USB send" mode, i.e it will send MIDI
 * messages through USB (this is disabled at startup). The synth will
 * acknowledge by sending a sysex on endpoint 0x85 and by displaying a USB
 * sign on its LCD. Values here are chosen based on sniffing USB traffic
 * under Windows.
 */
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;
}

/*
 * Some sound cards from Native Instruments are in fact compliant to the USB
 * audio standard of version 2 and other approved USB standards, even though
 * they come up as vendor-specific device when first connected.
 *
 * However, they can be told to come up with a new set of descriptors
 * upon their next enumeration, and the interfaces announced by the new
 * descriptors will then be handled by the kernel's class drivers. As the
 * product ID will also change, no further checks are required.
 */

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,
				  cpu_to_le16(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;
}

/*
 * Setup quirks
 */
#define AUDIOPHILE_SET			0x01 /* if set, parse device_setup */
#define AUDIOPHILE_SET_DTS              0x02 /* if set, enable DTS Digital Output */
#define AUDIOPHILE_SET_96K              0x04 /* 48-96KHz rate if set, 8-48KHz otherwise */
#define AUDIOPHILE_SET_24B		0x08 /* 24bits sample if set, 16bits otherwise */
#define AUDIOPHILE_SET_DI		0x10 /* if set, enable Digital Input */
#define AUDIOPHILE_SET_MASK		0x1F /* bit mask for setup value */
#define AUDIOPHILE_SET_24B_48K_DI	0x19 /* value for 24bits+48KHz+Digital Input */
#define AUDIOPHILE_SET_24B_48K_NOTDI	0x09 /* value for 24bits+48KHz+No Digital Input */
#define AUDIOPHILE_SET_16B_48K_DI	0x11 /* value for 16bits+48KHz+Digital Input */
#define AUDIOPHILE_SET_16B_48K_NOTDI	0x01 /* value for 16bits+48KHz+No Digital Input */

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 & AUDIOPHILE_SET) {
		if ((chip->setup & AUDIOPHILE_SET_DTS)
		    && altno != 6)
			return 1; /* skip this altsetting */
		if ((chip->setup & AUDIOPHILE_SET_96K)
		    && altno != 1)
			return 1; /* skip this altsetting */
		if ((chip->setup & AUDIOPHILE_SET_MASK) ==
		    AUDIOPHILE_SET_24B_48K_DI && altno != 2)
			return 1; /* skip this altsetting */
		if ((chip->setup & AUDIOPHILE_SET_MASK) ==
		    AUDIOPHILE_SET_24B_48K_NOTDI && altno != 3)
			return 1; /* skip this altsetting */
		if ((chip->setup & AUDIOPHILE_SET_MASK) ==
		    AUDIOPHILE_SET_16B_48K_DI && altno != 4)
			return 1; /* skip this altsetting */
		if ((chip->setup & AUDIOPHILE_SET_MASK) ==
		    AUDIOPHILE_SET_16B_48K_NOTDI && altno != 5)
			return 1; /* skip this altsetting */
	}

	return 0; /* keep this altsetting */
}

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);

	return 0;
}

int snd_usb_apply_boot_quirk(struct usb_device *dev,
			     struct usb_interface *intf,
			     const struct snd_usb_audio_quirk *quirk)
{
	u32 id = USB_ID(le16_to_cpu(dev->descriptor.idVendor),
			le16_to_cpu(dev->descriptor.idProduct));

	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 */
		return snd_usb_cm6206_boot_quirk(dev);

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

	case USB_ID(0x17cc, 0x1010): /* Traktor Audio 6 */
	case USB_ID(0x17cc, 0x1020): /* Traktor Audio 10 */
		return snd_usb_nativeinstruments_boot_quirk(dev);
	}

	return 0;
}

/*
 * check if the device uses big-endian samples
 */
int snd_usb_is_big_endian_format(struct snd_usb_audio *chip, struct audioformat *fp)
{
	switch (chip->usb_id) {
	case USB_ID(0x0763, 0x2001): /* M-Audio Quattro: captured data only */
		if (fp->endpoint & USB_DIR_IN)
			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;
	}
	return 0;
}

/*
 * For E-Mu 0404USB/0202USB/TrackerPre/0204 sample rate should be set for device,
 * not for interface.
 */

enum {
	EMU_QUIRK_SR_44100HZ = 0,
	EMU_QUIRK_SR_48000HZ,
	EMU_QUIRK_SR_88200HZ,
	EMU_QUIRK_SR_96000HZ,
	EMU_QUIRK_SR_176400HZ,
	EMU_QUIRK_SR_192000HZ
};

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);
}

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;
	}
}
Commit	Line	Data
e5779998 DM	1	/*
	2	* This program is free software; you can redistribute it and/or modify
	3	* it under the terms of the GNU General Public License as published by
	4	* the Free Software Foundation; either version 2 of the License, or
	5	* (at your option) any later version.
	6	*
	7	* This program is distributed in the hope that it will be useful,
	8	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	9	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	10	* GNU General Public License for more details.
	11	*
	12	* You should have received a copy of the GNU General Public License
	13	* along with this program; if not, write to the Free Software
	14	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	15	*/
	16
	17	#include <linux/init.h>
36db0456	18	#include <linux/slab.h>
e5779998 DM	19	#include <linux/usb.h>
	20	#include <linux/usb/audio.h>
	21
	22	#include <sound/core.h>
	23	#include <sound/info.h>
	24	#include <sound/pcm.h>
	25
	26	#include "usbaudio.h"
	27	#include "card.h"
f0b5e634	28	#include "mixer.h"
7b1eda22	29	#include "mixer_quirks.h"
e5779998 DM	30	#include "midi.h"
	31	#include "quirks.h"
	32	#include "helper.h"
	33	#include "endpoint.h"
	34	#include "pcm.h"
3d8d4dcf	35	#include "clock.h"
e5779998 DM	36
	37	/*
	38	* handle the quirks for the contained interfaces
	39	*/
	40	static int create_composite_quirk(struct snd_usb_audio *chip,
	41	struct usb_interface *iface,
	42	struct usb_driver *driver,
	43	const struct snd_usb_audio_quirk *quirk)
	44	{
	45	int probed_ifnum = get_iface_desc(iface->altsetting)->bInterfaceNumber;
	46	int err;
	47
	48	for (quirk = quirk->data; quirk->ifnum >= 0; ++quirk) {
	49	iface = usb_ifnum_to_if(chip->dev, quirk->ifnum);
	50	if (!iface)
	51	continue;
	52	if (quirk->ifnum != probed_ifnum &&
	53	usb_interface_claimed(iface))
	54	continue;
	55	err = snd_usb_create_quirk(chip, iface, driver, quirk);
	56	if (err < 0)
	57	return err;
	58	if (quirk->ifnum != probed_ifnum)
	59	usb_driver_claim_interface(driver, iface, (void *)-1L);
	60	}
	61	return 0;
	62	}
	63
	64	static int ignore_interface_quirk(struct snd_usb_audio *chip,
	65	struct usb_interface *iface,
	66	struct usb_driver *driver,
	67	const struct snd_usb_audio_quirk *quirk)
	68	{
	69	return 0;
	70	}
	71
	72
	73	/*
	74	* Allow alignment on audio sub-slot (channel samples) rather than
	75	* on audio slots (audio frames)
	76	*/
	77	static int create_align_transfer_quirk(struct snd_usb_audio *chip,
	78	struct usb_interface *iface,
	79	struct usb_driver *driver,
	80	const struct snd_usb_audio_quirk *quirk)
	81	{
	82	chip->txfr_quirk = 1;
	83	return 1; /* Continue with creating streams and mixer */
	84	}
	85
	86	static int create_any_midi_quirk(struct snd_usb_audio *chip,
	87	struct usb_interface *intf,
	88	struct usb_driver *driver,
	89	const struct snd_usb_audio_quirk *quirk)
	90	{
	91	return snd_usbmidi_create(chip->card, intf, &chip->midi_list, quirk);
	92	}
	93
	94	/*
	95	* create a stream for an interface with proper descriptors
	96	*/
	97	static int create_standard_audio_quirk(struct snd_usb_audio *chip,
	98	struct usb_interface *iface,
	99	struct usb_driver *driver,
100	const struct snd_usb_audio_quirk *quirk)
101	{
102	struct usb_host_interface *alts;
103	struct usb_interface_descriptor *altsd;
104	int err;
105
106	alts = &iface->altsetting[0];
107	altsd = get_iface_desc(alts);
108	err = snd_usb_parse_audio_endpoints(chip, altsd->bInterfaceNumber);
109	if (err < 0) {
110	snd_printk(KERN_ERR "cannot setup if %d: error %d\n",
111	altsd->bInterfaceNumber, err);
112	return err;
113	}
114	/* reset the current interface */
115	usb_set_interface(chip->dev, altsd->bInterfaceNumber, 0);
116	return 0;
117	}
118
119	/*
120	* create a stream for an endpoint/altsetting without proper descriptors
121	*/
122	static int create_fixed_stream_quirk(struct snd_usb_audio *chip,
123	struct usb_interface *iface,
124	struct usb_driver *driver,
125	const struct snd_usb_audio_quirk *quirk)
126	{
127	struct audioformat *fp;
128	struct usb_host_interface *alts;
129	int stream, err;
130	unsigned *rate_table = NULL;
131
132	fp = kmemdup(quirk->data, sizeof(*fp), GFP_KERNEL);
133	if (! fp) {
134	snd_printk(KERN_ERR "cannot memdup\n");
135	return -ENOMEM;
136	}
137	if (fp->nr_rates > 0) {
138	rate_table = kmalloc(sizeof(int) * fp->nr_rates, GFP_KERNEL);
139	if (!rate_table) {
140	kfree(fp);
141	return -ENOMEM;
142	}
143	memcpy(rate_table, fp->rate_table, sizeof(int) * fp->nr_rates);
144	fp->rate_table = rate_table;
145	}
146
147	stream = (fp->endpoint & USB_DIR_IN)
148	? SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK;
149	err = snd_usb_add_audio_endpoint(chip, stream, fp);
150	if (err < 0) {
151	kfree(fp);
152	kfree(rate_table);
153	return err;
154	}
155	if (fp->iface != get_iface_desc(&iface->altsetting[0])->bInterfaceNumber \|\|
156	fp->altset_idx >= iface->num_altsetting) {
157	kfree(fp);
158	kfree(rate_table);
159	return -EINVAL;
160	}
161	alts = &iface->altsetting[fp->altset_idx];
162	fp->datainterval = snd_usb_parse_datainterval(chip, alts);
163	fp->maxpacksize = le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize);
164	usb_set_interface(chip->dev, fp->iface, 0);
767d75ad DM	165	snd_usb_init_pitch(chip, fp->iface, alts, fp);
767d75ad DM	166	snd_usb_init_sample_rate(chip, fp->iface, alts, fp, fp->rate_max);
e5779998 DM	167	return 0;
	168	}
	169
	170	/*
	171	* Create a stream for an Edirol UA-700/UA-25/UA-4FX interface.
	172	* The only way to detect the sample rate is by looking at wMaxPacketSize.
	173	*/
	174	static int create_uaxx_quirk(struct snd_usb_audio *chip,
	175	struct usb_interface *iface,
	176	struct usb_driver *driver,
	177	const struct snd_usb_audio_quirk *quirk)
	178	{
	179	static const struct audioformat ua_format = {
015eb0b0	180	.formats = SNDRV_PCM_FMTBIT_S24_3LE,
e5779998 DM	181	.channels = 2,
	182	.fmt_type = UAC_FORMAT_TYPE_I,
	183	.altsetting = 1,
	184	.altset_idx = 1,
	185	.rates = SNDRV_PCM_RATE_CONTINUOUS,
	186	};
	187	struct usb_host_interface *alts;
	188	struct usb_interface_descriptor *altsd;
	189	struct audioformat *fp;
	190	int stream, err;
	191
	192	/* both PCM and MIDI interfaces have 2 or more altsettings */
	193	if (iface->num_altsetting < 2)
	194	return -ENXIO;
	195	alts = &iface->altsetting[1];
	196	altsd = get_iface_desc(alts);
	197
	198	if (altsd->bNumEndpoints == 2) {
	199	static const struct snd_usb_midi_endpoint_info ua700_ep = {
	200	.out_cables = 0x0003,
	201	.in_cables = 0x0003
	202	};
	203	static const struct snd_usb_audio_quirk ua700_quirk = {
	204	.type = QUIRK_MIDI_FIXED_ENDPOINT,
	205	.data = &ua700_ep
	206	};
	207	static const struct snd_usb_midi_endpoint_info uaxx_ep = {
	208	.out_cables = 0x0001,
	209	.in_cables = 0x0001
	210	};
	211	static const struct snd_usb_audio_quirk uaxx_quirk = {
	212	.type = QUIRK_MIDI_FIXED_ENDPOINT,
	213	.data = &uaxx_ep
	214	};
	215	const struct snd_usb_audio_quirk *quirk =
	216	chip->usb_id == USB_ID(0x0582, 0x002b)
	217	? &ua700_quirk : &uaxx_quirk;
	218	return snd_usbmidi_create(chip->card, iface,
	219	&chip->midi_list, quirk);
	220	}
	221
	222	if (altsd->bNumEndpoints != 1)
	223	return -ENXIO;
	224
	225	fp = kmalloc(sizeof(*fp), GFP_KERNEL);
	226	if (!fp)
	227	return -ENOMEM;
	228	memcpy(fp, &ua_format, sizeof(*fp));
	229
	230	fp->iface = altsd->bInterfaceNumber;
	231	fp->endpoint = get_endpoint(alts, 0)->bEndpointAddress;
	232	fp->ep_attr = get_endpoint(alts, 0)->bmAttributes;
	233	fp->datainterval = 0;
	234	fp->maxpacksize = le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize);
	235
	236	switch (fp->maxpacksize) {
	237	case 0x120:
	238	fp->rate_max = fp->rate_min = 44100;
	239	break;
	240	case 0x138:
	241	case 0x140:
	242	fp->rate_max = fp->rate_min = 48000;
	243	break;
	244	case 0x258:
245	case 0x260:
246	fp->rate_max = fp->rate_min = 96000;
247	break;
248	default:
249	snd_printk(KERN_ERR "unknown sample rate\n");
250	kfree(fp);
251	return -ENXIO;
252	}
253
254	stream = (fp->endpoint & USB_DIR_IN)
255	? SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK;
256	err = snd_usb_add_audio_endpoint(chip, stream, fp);
257	if (err < 0) {
258	kfree(fp);
259	return err;
260	}
261	usb_set_interface(chip->dev, fp->iface, 0);
262	return 0;
263	}
264
265	/*
266	* audio-interface quirks
267	*
268	* returns zero if no standard audio/MIDI parsing is needed.
25985edc	269	* returns a positive value if standard audio/midi interfaces are parsed
e5779998 DM	270	* after this.
	271	* returns a negative value at error.
	272	*/
	273	int snd_usb_create_quirk(struct snd_usb_audio *chip,
	274	struct usb_interface *iface,
	275	struct usb_driver *driver,
	276	const struct snd_usb_audio_quirk *quirk)
	277	{
	278	typedef int (quirk_func_t)(struct snd_usb_audio ,
	279	struct usb_interface *,
	280	struct usb_driver *,
	281	const struct snd_usb_audio_quirk *);
	282	static const quirk_func_t quirk_funcs[] = {
	283	[QUIRK_IGNORE_INTERFACE] = ignore_interface_quirk,
	284	[QUIRK_COMPOSITE] = create_composite_quirk,
	285	[QUIRK_MIDI_STANDARD_INTERFACE] = create_any_midi_quirk,
	286	[QUIRK_MIDI_FIXED_ENDPOINT] = create_any_midi_quirk,
	287	[QUIRK_MIDI_YAMAHA] = create_any_midi_quirk,
	288	[QUIRK_MIDI_MIDIMAN] = create_any_midi_quirk,
	289	[QUIRK_MIDI_NOVATION] = create_any_midi_quirk,
c7f57216	290	[QUIRK_MIDI_RAW_BYTES] = create_any_midi_quirk,
e5779998 DM	291	[QUIRK_MIDI_EMAGIC] = create_any_midi_quirk,
e5779998 DM	292	[QUIRK_MIDI_CME] = create_any_midi_quirk,
4434ade8	293	[QUIRK_MIDI_AKAI] = create_any_midi_quirk,
e5779998 DM	294	[QUIRK_AUDIO_STANDARD_INTERFACE] = create_standard_audio_quirk,
	295	[QUIRK_AUDIO_FIXED_ENDPOINT] = create_fixed_stream_quirk,
	296	[QUIRK_AUDIO_EDIROL_UAXX] = create_uaxx_quirk,
	297	[QUIRK_AUDIO_ALIGN_TRANSFER] = create_align_transfer_quirk
	298	};
	299
	300	if (quirk->type < QUIRK_TYPE_COUNT) {
	301	return quirk_funcs[quirk->type](chip, iface, driver, quirk);
	302	} else {
	303	snd_printd(KERN_ERR "invalid quirk type %d\n", quirk->type);
	304	return -ENXIO;
	305	}
	306	}
	307
	308	/*
	309	* boot quirks
	310	*/
	311
	312	#define EXTIGY_FIRMWARE_SIZE_OLD 794
	313	#define EXTIGY_FIRMWARE_SIZE_NEW 483
	314
	315	static int snd_usb_extigy_boot_quirk(struct usb_device dev, struct usb_interface intf)
	316	{
	317	struct usb_host_config *config = dev->actconfig;
	318	int err;
	319
	320	if (le16_to_cpu(get_cfg_desc(config)->wTotalLength) == EXTIGY_FIRMWARE_SIZE_OLD \|\|
	321	le16_to_cpu(get_cfg_desc(config)->wTotalLength) == EXTIGY_FIRMWARE_SIZE_NEW) {
	322	snd_printdd("sending Extigy boot sequence...\n");
	323	/* Send message to force it to reconnect with full interface. */
	324	err = snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev,0),
	325	0x10, 0x43, 0x0001, 0x000a, NULL, 0, 1000);
	326	if (err < 0) snd_printdd("error sending boot message: %d\n", err);
	327	err = usb_get_descriptor(dev, USB_DT_DEVICE, 0,
	328	&dev->descriptor, sizeof(dev->descriptor));
	329	config = dev->actconfig;
	330	if (err < 0) snd_printdd("error usb_get_descriptor: %d\n", err);
	331	err = usb_reset_configuration(dev);
	332	if (err < 0) snd_printdd("error usb_reset_configuration: %d\n", err);
	333	snd_printdd("extigy_boot: new boot length = %d\n",
	334	le16_to_cpu(get_cfg_desc(config)->wTotalLength));
	335	return -ENODEV; /* quit this anyway */
	336	}
	337	return 0;
	338	}
	339
	340	static int snd_usb_audigy2nx_boot_quirk(struct usb_device *dev)
	341	{
	342	u8 buf = 1;
	343
	344	snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0), 0x2a,
	345	USB_DIR_IN \| USB_TYPE_VENDOR \| USB_RECIP_OTHER,
	346	0, 0, &buf, 1, 1000);
	347	if (buf == 0) {
	348	snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), 0x29,
	349	USB_DIR_OUT \| USB_TYPE_VENDOR \| USB_RECIP_OTHER,
	350	1, 2000, NULL, 0, 1000);
	351	return -ENODEV;
	352	}
	353	return 0;
	354	}
	355
	356	/*
	357	* C-Media CM106/CM106+ have four 16-bit internal registers that are nicely
358	* documented in the device's data sheet.
359	*/
360	static int snd_usb_cm106_write_int_reg(struct usb_device *dev, int reg, u16 value)
361	{
362	u8 buf[4];
363	buf[0] = 0x20;
364	buf[1] = value & 0xff;
365	buf[2] = (value >> 8) & 0xff;
366	buf[3] = reg;
367	return snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), USB_REQ_SET_CONFIGURATION,
368	USB_DIR_OUT \| USB_TYPE_CLASS \| USB_RECIP_ENDPOINT,
369	0, 0, &buf, 4, 1000);
370	}
371
372	static int snd_usb_cm106_boot_quirk(struct usb_device *dev)
373	{
374	/*
375	* Enable line-out driver mode, set headphone source to front
376	* channels, enable stereo mic.
377	*/
378	return snd_usb_cm106_write_int_reg(dev, 2, 0x8004);
379	}
380
381	/*
382	* C-Media CM6206 is based on CM106 with two additional
383	* registers that are not documented in the data sheet.
384	* Values here are chosen based on sniffing USB traffic
385	* under Windows.
386	*/
387	static int snd_usb_cm6206_boot_quirk(struct usb_device *dev)
388	{
389	int err, reg;
390	int val[] = {0x200c, 0x3000, 0xf800, 0x143f, 0x0000, 0x3000};
391
392	for (reg = 0; reg < ARRAY_SIZE(val); reg++) {
393	err = snd_usb_cm106_write_int_reg(dev, reg, val[reg]);
394	if (err < 0)
395	return err;
396	}
397
398	return err;
399	}
400
401	/*
402	* This call will put the synth in "USB send" mode, i.e it will send MIDI
403	* messages through USB (this is disabled at startup). The synth will
404	* acknowledge by sending a sysex on endpoint 0x85 and by displaying a USB
405	* sign on its LCD. Values here are chosen based on sniffing USB traffic
406	* under Windows.
407	*/
408	static int snd_usb_accessmusic_boot_quirk(struct usb_device *dev)
409	{
410	int err, actual_length;
411
412	/* "midi send" enable */
413	static const u8 seq[] = { 0x4e, 0x73, 0x52, 0x01 };
414
415	void *buf = kmemdup(seq, ARRAY_SIZE(seq), GFP_KERNEL);
416	if (!buf)
417	return -ENOMEM;
418	err = usb_interrupt_msg(dev, usb_sndintpipe(dev, 0x05), buf,
419	ARRAY_SIZE(seq), &actual_length, 1000);
420	kfree(buf);
421	if (err < 0)
422	return err;
423
424	return 0;
425	}
426
54a8c500 DM	427	/*
	428	* Some sound cards from Native Instruments are in fact compliant to the USB
	429	* audio standard of version 2 and other approved USB standards, even though
	430	* they come up as vendor-specific device when first connected.
	431	*
	432	* However, they can be told to come up with a new set of descriptors
	433	* upon their next enumeration, and the interfaces announced by the new
	434	* descriptors will then be handled by the kernel's class drivers. As the
	435	* product ID will also change, no further checks are required.
	436	*/
	437
	438	static int snd_usb_nativeinstruments_boot_quirk(struct usb_device *dev)
	439	{
	440	int ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
	441	0xaf, USB_TYPE_VENDOR \| USB_RECIP_DEVICE,
	442	cpu_to_le16(1), 0, NULL, 0, 1000);
	443
	444	if (ret < 0)
	445	return ret;
	446
	447	usb_reset_device(dev);
	448
	449	/* return -EAGAIN, so the creation of an audio interface for this
	450	* temporary device is aborted. The device will reconnect with a
	451	* new product ID */
	452	return -EAGAIN;
	453	}
	454
e5779998 DM	455	/*
	456	* Setup quirks
	457	*/
	458	#define AUDIOPHILE_SET 0x01 /* if set, parse device_setup */
	459	#define AUDIOPHILE_SET_DTS 0x02 /* if set, enable DTS Digital Output */
	460	#define AUDIOPHILE_SET_96K 0x04 /* 48-96KHz rate if set, 8-48KHz otherwise */
	461	#define AUDIOPHILE_SET_24B 0x08 /* 24bits sample if set, 16bits otherwise */
	462	#define AUDIOPHILE_SET_DI 0x10 /* if set, enable Digital Input */
	463	#define AUDIOPHILE_SET_MASK 0x1F /* bit mask for setup value */
	464	#define AUDIOPHILE_SET_24B_48K_DI 0x19 /* value for 24bits+48KHz+Digital Input */
	465	#define AUDIOPHILE_SET_24B_48K_NOTDI 0x09 /* value for 24bits+48KHz+No Digital Input */
	466	#define AUDIOPHILE_SET_16B_48K_DI 0x11 /* value for 16bits+48KHz+Digital Input */
	467	#define AUDIOPHILE_SET_16B_48K_NOTDI 0x01 /* value for 16bits+48KHz+No Digital Input */
	468
	469	static int audiophile_skip_setting_quirk(struct snd_usb_audio *chip,
	470	int iface,
	471	int altno)
	472	{
	473	/* Reset ALL ifaces to 0 altsetting.
	474	* Call it for every possible altsetting of every interface.
	475	*/
	476	usb_set_interface(chip->dev, iface, 0);
	477
	478	if (chip->setup & AUDIOPHILE_SET) {
	479	if ((chip->setup & AUDIOPHILE_SET_DTS)
	480	&& altno != 6)
	481	return 1; /* skip this altsetting */
	482	if ((chip->setup & AUDIOPHILE_SET_96K)
	483	&& altno != 1)
	484	return 1; /* skip this altsetting */
	485	if ((chip->setup & AUDIOPHILE_SET_MASK) ==
	486	AUDIOPHILE_SET_24B_48K_DI && altno != 2)
	487	return 1; /* skip this altsetting */
	488	if ((chip->setup & AUDIOPHILE_SET_MASK) ==
	489	AUDIOPHILE_SET_24B_48K_NOTDI && altno != 3)
	490	return 1; /* skip this altsetting */
	491	if ((chip->setup & AUDIOPHILE_SET_MASK) ==
	492	AUDIOPHILE_SET_16B_48K_DI && altno != 4)
	493	return 1; /* skip this altsetting */
	494	if ((chip->setup & AUDIOPHILE_SET_MASK) ==
	495	AUDIOPHILE_SET_16B_48K_NOTDI && altno != 5)
	496	return 1; /* skip this altsetting */
	497	}
	498
	499	return 0; /* keep this altsetting */
	500	}
	501
	502	int snd_usb_apply_interface_quirk(struct snd_usb_audio *chip,
	503	int iface,
	504	int altno)
	505	{
	506	/* audiophile usb: skip altsets incompatible with device_setup */
	507	if (chip->usb_id == USB_ID(0x0763, 0x2003))
	508	return audiophile_skip_setting_quirk(chip, iface, altno);
	509
	510	return 0;
	511	}
	512
	513	int snd_usb_apply_boot_quirk(struct usb_device *dev,
	514	struct usb_interface *intf,
	515	const struct snd_usb_audio_quirk *quirk)
	516	{
	517	u32 id = USB_ID(le16_to_cpu(dev->descriptor.idVendor),
	518	le16_to_cpu(dev->descriptor.idProduct));
519
3347b26c DM	520	switch (id) {
	521	case USB_ID(0x041e, 0x3000):
	522	/* SB Extigy needs special boot-up sequence */
	523	/* if more models come, this will go to the quirk list. */
e5779998 DM	524	return snd_usb_extigy_boot_quirk(dev, intf);
e5779998 DM	525
3347b26c DM	526	case USB_ID(0x041e, 0x3020):
3347b26c DM	527	/* SB Audigy 2 NX needs its own boot-up magic, too */
e5779998 DM	528	return snd_usb_audigy2nx_boot_quirk(dev);
e5779998 DM	529
3347b26c DM	530	case USB_ID(0x10f5, 0x0200):
3347b26c DM	531	/* C-Media CM106 / Turtle Beach Audio Advantage Roadie */
e5779998 DM	532	return snd_usb_cm106_boot_quirk(dev);
e5779998 DM	533
3347b26c DM	534	case USB_ID(0x0d8c, 0x0102):
3347b26c DM	535	/* C-Media CM6206 / CM106-Like Sound Device */
e5779998 DM	536	return snd_usb_cm6206_boot_quirk(dev);
e5779998 DM	537
3347b26c DM	538	case USB_ID(0x133e, 0x0815):
3347b26c DM	539	/* Access Music VirusTI Desktop */
e5779998 DM	540	return snd_usb_accessmusic_boot_quirk(dev);
e5779998 DM	541
3347b26c DM	542	case USB_ID(0x17cc, 0x1010): /* Traktor Audio 6 */
3347b26c DM	543	case USB_ID(0x17cc, 0x1020): /* Traktor Audio 10 */
54a8c500	544	return snd_usb_nativeinstruments_boot_quirk(dev);
3347b26c	545	}
54a8c500	546
e5779998 DM	547	return 0;
	548	}
	549
	550	/*
	551	* check if the device uses big-endian samples
	552	*/
	553	int snd_usb_is_big_endian_format(struct snd_usb_audio chip, struct audioformat fp)
	554	{
	555	switch (chip->usb_id) {
	556	case USB_ID(0x0763, 0x2001): /* M-Audio Quattro: captured data only */
	557	if (fp->endpoint & USB_DIR_IN)
	558	return 1;
	559	break;
	560	case USB_ID(0x0763, 0x2003): /* M-Audio Audiophile USB */
	561	if (chip->setup == 0x00 \|\|
	562	fp->altsetting==1 \|\| fp->altsetting==2 \|\| fp->altsetting==3)
	563	return 1;
	564	}
	565	return 0;
	566	}
	567
	568	/*
1cdfa9f3	569	* For E-Mu 0404USB/0202USB/TrackerPre/0204 sample rate should be set for device,
e5779998 DM	570	* not for interface.
	571	*/
	572
	573	enum {
	574	EMU_QUIRK_SR_44100HZ = 0,
	575	EMU_QUIRK_SR_48000HZ,
	576	EMU_QUIRK_SR_88200HZ,
	577	EMU_QUIRK_SR_96000HZ,
	578	EMU_QUIRK_SR_176400HZ,
	579	EMU_QUIRK_SR_192000HZ
	580	};
	581
	582	static void set_format_emu_quirk(struct snd_usb_substream *subs,
	583	struct audioformat *fmt)
	584	{
	585	unsigned char emu_samplerate_id = 0;
	586
	587	/* When capture is active
	588	* sample rate shouldn't be changed
	589	* by playback substream
	590	*/
	591	if (subs->direction == SNDRV_PCM_STREAM_PLAYBACK) {
	592	if (subs->stream->substream[SNDRV_PCM_STREAM_CAPTURE].interface != -1)
	593	return;
	594	}
	595
	596	switch (fmt->rate_min) {
	597	case 48000:
	598	emu_samplerate_id = EMU_QUIRK_SR_48000HZ;
	599	break;
	600	case 88200:
	601	emu_samplerate_id = EMU_QUIRK_SR_88200HZ;
	602	break;
	603	case 96000:
	604	emu_samplerate_id = EMU_QUIRK_SR_96000HZ;
	605	break;
	606	case 176400:
	607	emu_samplerate_id = EMU_QUIRK_SR_176400HZ;
	608	break;
	609	case 192000:
	610	emu_samplerate_id = EMU_QUIRK_SR_192000HZ;
	611	break;
	612	default:
	613	emu_samplerate_id = EMU_QUIRK_SR_44100HZ;
	614	break;
	615	}
	616	snd_emuusb_set_samplerate(subs->stream->chip, emu_samplerate_id);
	617	}
	618
	619	void snd_usb_set_format_quirk(struct snd_usb_substream *subs,
	620	struct audioformat *fmt)
	621	{
	622	switch (subs->stream->chip->usb_id) {
	623	case USB_ID(0x041e, 0x3f02): /* E-Mu 0202 USB */
	624	case USB_ID(0x041e, 0x3f04): /* E-Mu 0404 USB */
	625	case USB_ID(0x041e, 0x3f0a): /* E-Mu Tracker Pre */
1cdfa9f3	626	case USB_ID(0x041e, 0x3f19): /* E-Mu 0204 USB */
e5779998 DM	627	set_format_emu_quirk(subs, fmt);
	628	break;
	629	}
	630	}
	631