/*
   *   USB Audio Driver for ALSA
   *
   *   Quirks and vendor-specific extensions for mixer interfaces
   *
   *   Copyright (c) 2002 by Takashi Iwai <tiwai@suse.de>
   *
   *   Many codes borrowed from audio.c by
   *	    Alan Cox (alan@lxorguk.ukuu.org.uk)
   *	    Thomas Sailer (sailer@ife.ee.ethz.ch)
   *
   *
   *   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/control.h>
  #include <sound/hwdep.h>
  #include <sound/info.h>
  
  #include "usbaudio.h"

  #include "mixer.h"

  #include "mixer_quirks.h"
  #include "helper.h"

  extern struct snd_kcontrol_new *snd_usb_feature_unit_ctl;

  /*
   * Sound Blaster remote control configuration
   *
   * format of remote control data:
   * Extigy:       xx 00
   * Audigy 2 NX:  06 80 xx 00 00 00
   * Live! 24-bit: 06 80 xx yy 22 83
   */
  static const struct rc_config {
  	u32 usb_id;
  	u8  offset;
  	u8  length;
  	u8  packet_length;
  	u8  min_packet_length; /* minimum accepted length of the URB result */
  	u8  mute_mixer_id;
  	u32 mute_code;
  } rc_configs[] = {
  	{ USB_ID(0x041e, 0x3000), 0, 1, 2, 1,  18, 0x0013 }, /* Extigy       */
  	{ USB_ID(0x041e, 0x3020), 2, 1, 6, 6,  18, 0x0013 }, /* Audigy 2 NX  */
  	{ USB_ID(0x041e, 0x3040), 2, 2, 6, 6,  2,  0x6e91 }, /* Live! 24-bit */

  	{ USB_ID(0x041e, 0x3042), 0, 1, 1, 1,  1,  0x000d }, /* Usb X-Fi S51 */

  	{ USB_ID(0x041e, 0x30df), 0, 1, 1, 1,  1,  0x000d }, /* Usb X-Fi S51 Pro */

  	{ USB_ID(0x041e, 0x3048), 2, 2, 6, 6,  2,  0x6e91 }, /* Toshiba SB0500 */
  };
  
  static void snd_usb_soundblaster_remote_complete(struct urb *urb)
  {
  	struct usb_mixer_interface *mixer = urb->context;
  	const struct rc_config *rc = mixer->rc_cfg;
  	u32 code;
  
  	if (urb->status < 0 || urb->actual_length < rc->min_packet_length)
  		return;
  
  	code = mixer->rc_buffer[rc->offset];
  	if (rc->length == 2)
  		code |= mixer->rc_buffer[rc->offset + 1] << 8;
  
  	/* the Mute button actually changes the mixer control */
  	if (code == rc->mute_code)
  		snd_usb_mixer_notify_id(mixer, rc->mute_mixer_id);
  	mixer->rc_code = code;
  	wmb();
  	wake_up(&mixer->rc_waitq);
  }
  
  static long snd_usb_sbrc_hwdep_read(struct snd_hwdep *hw, char __user *buf,
  				     long count, loff_t *offset)
  {
  	struct usb_mixer_interface *mixer = hw->private_data;
  	int err;
  	u32 rc_code;
  
  	if (count != 1 && count != 4)
  		return -EINVAL;
  	err = wait_event_interruptible(mixer->rc_waitq,
  				       (rc_code = xchg(&mixer->rc_code, 0)) != 0);
  	if (err == 0) {
  		if (count == 1)
  			err = put_user(rc_code, buf);
  		else
  			err = put_user(rc_code, (u32 __user *)buf);
  	}
  	return err < 0 ? err : count;
  }
  
  static unsigned int snd_usb_sbrc_hwdep_poll(struct snd_hwdep *hw, struct file *file,
  					    poll_table *wait)
  {
  	struct usb_mixer_interface *mixer = hw->private_data;
  
  	poll_wait(file, &mixer->rc_waitq, wait);
  	return mixer->rc_code ? POLLIN | POLLRDNORM : 0;
  }
  
  static int snd_usb_soundblaster_remote_init(struct usb_mixer_interface *mixer)
  {
  	struct snd_hwdep *hwdep;
  	int err, len, i;
  
  	for (i = 0; i < ARRAY_SIZE(rc_configs); ++i)
  		if (rc_configs[i].usb_id == mixer->chip->usb_id)
  			break;
  	if (i >= ARRAY_SIZE(rc_configs))
  		return 0;
  	mixer->rc_cfg = &rc_configs[i];
  
  	len = mixer->rc_cfg->packet_length;
  
  	init_waitqueue_head(&mixer->rc_waitq);
  	err = snd_hwdep_new(mixer->chip->card, "SB remote control", 0, &hwdep);
  	if (err < 0)
  		return err;
  	snprintf(hwdep->name, sizeof(hwdep->name),
  		 "%s remote control", mixer->chip->card->shortname);
  	hwdep->iface = SNDRV_HWDEP_IFACE_SB_RC;
  	hwdep->private_data = mixer;
  	hwdep->ops.read = snd_usb_sbrc_hwdep_read;
  	hwdep->ops.poll = snd_usb_sbrc_hwdep_poll;
  	hwdep->exclusive = 1;
  
  	mixer->rc_urb = usb_alloc_urb(0, GFP_KERNEL);
  	if (!mixer->rc_urb)
  		return -ENOMEM;
  	mixer->rc_setup_packet = kmalloc(sizeof(*mixer->rc_setup_packet), GFP_KERNEL);
  	if (!mixer->rc_setup_packet) {
  		usb_free_urb(mixer->rc_urb);
  		mixer->rc_urb = NULL;
  		return -ENOMEM;
  	}
  	mixer->rc_setup_packet->bRequestType =
  		USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE;
  	mixer->rc_setup_packet->bRequest = UAC_GET_MEM;
  	mixer->rc_setup_packet->wValue = cpu_to_le16(0);
  	mixer->rc_setup_packet->wIndex = cpu_to_le16(0);
  	mixer->rc_setup_packet->wLength = cpu_to_le16(len);
  	usb_fill_control_urb(mixer->rc_urb, mixer->chip->dev,
  			     usb_rcvctrlpipe(mixer->chip->dev, 0),
  			     (u8*)mixer->rc_setup_packet, mixer->rc_buffer, len,
  			     snd_usb_soundblaster_remote_complete, mixer);
  	return 0;
  }
  
  #define snd_audigy2nx_led_info		snd_ctl_boolean_mono_info
  
  static int snd_audigy2nx_led_get(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
  {
  	struct usb_mixer_interface *mixer = snd_kcontrol_chip(kcontrol);
  	int index = kcontrol->private_value;
  
  	ucontrol->value.integer.value[0] = mixer->audigy2nx_leds[index];
  	return 0;
  }
  
  static int snd_audigy2nx_led_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
  {
  	struct usb_mixer_interface *mixer = snd_kcontrol_chip(kcontrol);
  	int index = kcontrol->private_value;
  	int value = ucontrol->value.integer.value[0];
  	int err, changed;
  
  	if (value > 1)
  		return -EINVAL;
  	changed = value != mixer->audigy2nx_leds[index];

  	if (mixer->chip->usb_id == USB_ID(0x041e, 0x3042))
  		err = snd_usb_ctl_msg(mixer->chip->dev,
  			      usb_sndctrlpipe(mixer->chip->dev, 0), 0x24,
  			      USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_OTHER,

  			      !value, 0, NULL, 0);

  	/* USB X-Fi S51 Pro */
  	if (mixer->chip->usb_id == USB_ID(0x041e, 0x30df))
  		err = snd_usb_ctl_msg(mixer->chip->dev,
  			      usb_sndctrlpipe(mixer->chip->dev, 0), 0x24,
  			      USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_OTHER,

  			      !value, 0, NULL, 0);

  	else
  		err = snd_usb_ctl_msg(mixer->chip->dev,

  			      usb_sndctrlpipe(mixer->chip->dev, 0), 0x24,
  			      USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_OTHER,

  			      value, index + 2, NULL, 0);

  	if (err < 0)
  		return err;
  	mixer->audigy2nx_leds[index] = value;
  	return changed;
  }
  
  static struct snd_kcontrol_new snd_audigy2nx_controls[] = {
  	{
  		.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
  		.name = "CMSS LED Switch",
  		.info = snd_audigy2nx_led_info,
  		.get = snd_audigy2nx_led_get,
  		.put = snd_audigy2nx_led_put,
  		.private_value = 0,
  	},
  	{
  		.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
  		.name = "Power LED Switch",
  		.info = snd_audigy2nx_led_info,
  		.get = snd_audigy2nx_led_get,
  		.put = snd_audigy2nx_led_put,
  		.private_value = 1,
  	},
  	{
  		.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
  		.name = "Dolby Digital LED Switch",
  		.info = snd_audigy2nx_led_info,
  		.get = snd_audigy2nx_led_get,
  		.put = snd_audigy2nx_led_put,
  		.private_value = 2,
  	},
  };
  
  static int snd_audigy2nx_controls_create(struct usb_mixer_interface *mixer)
  {
  	int i, err;
  
  	for (i = 0; i < ARRAY_SIZE(snd_audigy2nx_controls); ++i) {

  		/* USB X-Fi S51 doesn't have a CMSS LED */
  		if ((mixer->chip->usb_id == USB_ID(0x041e, 0x3042)) && i == 0)
  			continue;

  		/* USB X-Fi S51 Pro doesn't have one either */
  		if ((mixer->chip->usb_id == USB_ID(0x041e, 0x30df)) && i == 0)
  			continue;

  		if (i > 1 && /* Live24ext has 2 LEDs only */
  			(mixer->chip->usb_id == USB_ID(0x041e, 0x3040) ||

  			 mixer->chip->usb_id == USB_ID(0x041e, 0x3042) ||

  			 mixer->chip->usb_id == USB_ID(0x041e, 0x30df) ||

  			 mixer->chip->usb_id == USB_ID(0x041e, 0x3048)))
  			break; 
  		err = snd_ctl_add(mixer->chip->card,
  				  snd_ctl_new1(&snd_audigy2nx_controls[i], mixer));
  		if (err < 0)
  			return err;
  	}
  	mixer->audigy2nx_leds[1] = 1; /* Power LED is on by default */
  	return 0;
  }
  
  static void snd_audigy2nx_proc_read(struct snd_info_entry *entry,
  				    struct snd_info_buffer *buffer)
  {
  	static const struct sb_jack {
  		int unitid;
  		const char *name;
  	}  jacks_audigy2nx[] = {
  		{4,  "dig in "},
  		{7,  "line in"},
  		{19, "spk out"},
  		{20, "hph out"},
  		{-1, NULL}
  	}, jacks_live24ext[] = {
  		{4,  "line in"}, /* &1=Line, &2=Mic*/
  		{3,  "hph out"}, /* headphones */
  		{0,  "RC     "}, /* last command, 6 bytes see rc_config above */
  		{-1, NULL}
  	};
  	const struct sb_jack *jacks;
  	struct usb_mixer_interface *mixer = entry->private_data;
  	int i, err;
  	u8 buf[3];
  
  	snd_iprintf(buffer, "%s jacks
  
  ", mixer->chip->card->shortname);
  	if (mixer->chip->usb_id == USB_ID(0x041e, 0x3020))
  		jacks = jacks_audigy2nx;
  	else if (mixer->chip->usb_id == USB_ID(0x041e, 0x3040) ||
  		 mixer->chip->usb_id == USB_ID(0x041e, 0x3048))
  		jacks = jacks_live24ext;
  	else
  		return;
  
  	for (i = 0; jacks[i].name; ++i) {
  		snd_iprintf(buffer, "%s: ", jacks[i].name);
  		err = snd_usb_ctl_msg(mixer->chip->dev,
  				      usb_rcvctrlpipe(mixer->chip->dev, 0),
  				      UAC_GET_MEM, USB_DIR_IN | USB_TYPE_CLASS |
  				      USB_RECIP_INTERFACE, 0,

  				      jacks[i].unitid << 8, buf, 3);

  		if (err == 3 && (buf[0] == 3 || buf[0] == 6))
  			snd_iprintf(buffer, "%02x %02x
  ", buf[1], buf[2]);
  		else
  			snd_iprintf(buffer, "?
  ");
  	}
  }
  
  static int snd_xonar_u1_switch_get(struct snd_kcontrol *kcontrol,
  				   struct snd_ctl_elem_value *ucontrol)
  {
  	struct usb_mixer_interface *mixer = snd_kcontrol_chip(kcontrol);
  
  	ucontrol->value.integer.value[0] = !!(mixer->xonar_u1_status & 0x02);
  	return 0;
  }
  
  static int snd_xonar_u1_switch_put(struct snd_kcontrol *kcontrol,
  				   struct snd_ctl_elem_value *ucontrol)
  {
  	struct usb_mixer_interface *mixer = snd_kcontrol_chip(kcontrol);
  	u8 old_status, new_status;
  	int err, changed;
  
  	old_status = mixer->xonar_u1_status;
  	if (ucontrol->value.integer.value[0])
  		new_status = old_status | 0x02;
  	else
  		new_status = old_status & ~0x02;
  	changed = new_status != old_status;
  	err = snd_usb_ctl_msg(mixer->chip->dev,
  			      usb_sndctrlpipe(mixer->chip->dev, 0), 0x08,
  			      USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_OTHER,

  			      50, 0, &new_status, 1);

  	if (err < 0)
  		return err;
  	mixer->xonar_u1_status = new_status;
  	return changed;
  }
  
  static struct snd_kcontrol_new snd_xonar_u1_output_switch = {
  	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
  	.name = "Digital Playback Switch",
  	.info = snd_ctl_boolean_mono_info,
  	.get = snd_xonar_u1_switch_get,
  	.put = snd_xonar_u1_switch_put,
  };
  
  static int snd_xonar_u1_controls_create(struct usb_mixer_interface *mixer)
  {
  	int err;
  
  	err = snd_ctl_add(mixer->chip->card,
  			  snd_ctl_new1(&snd_xonar_u1_output_switch, mixer));
  	if (err < 0)
  		return err;
  	mixer->xonar_u1_status = 0x05;
  	return 0;
  }

  /* Native Instruments device quirks */
  
  #define _MAKE_NI_CONTROL(bRequest,wIndex) ((bRequest) << 16 | (wIndex))
  
  static int snd_nativeinstruments_control_get(struct snd_kcontrol *kcontrol,
  					     struct snd_ctl_elem_value *ucontrol)
  {
  	struct usb_mixer_interface *mixer = snd_kcontrol_chip(kcontrol);
  	struct usb_device *dev = mixer->chip->dev;
  	u8 bRequest = (kcontrol->private_value >> 16) & 0xff;
  	u16 wIndex = kcontrol->private_value & 0xffff;
  	u8 tmp;
  
  	int ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), bRequest,
  				  USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN,
  				  0, cpu_to_le16(wIndex),
  				  &tmp, sizeof(tmp), 1000);
  
  	if (ret < 0) {
  		snd_printk(KERN_ERR
  			   "unable to issue vendor read request (ret = %d)", ret);
  		return ret;
  	}
  
  	ucontrol->value.integer.value[0] = tmp;
  
  	return 0;
  }
  
  static int snd_nativeinstruments_control_put(struct snd_kcontrol *kcontrol,
  					     struct snd_ctl_elem_value *ucontrol)
  {
  	struct usb_mixer_interface *mixer = snd_kcontrol_chip(kcontrol);
  	struct usb_device *dev = mixer->chip->dev;
  	u8 bRequest = (kcontrol->private_value >> 16) & 0xff;
  	u16 wIndex = kcontrol->private_value & 0xffff;
  	u16 wValue = ucontrol->value.integer.value[0];
  
  	int ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), bRequest,
  				  USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT,
  				  cpu_to_le16(wValue), cpu_to_le16(wIndex),
  				  NULL, 0, 1000);
  
  	if (ret < 0) {
  		snd_printk(KERN_ERR
  			   "unable to issue vendor write request (ret = %d)", ret);
  		return ret;
  	}
  
  	return 0;
  }
  
  static struct snd_kcontrol_new snd_nativeinstruments_ta6_mixers[] = {
  	{
  		.name = "Direct Thru Channel A",
  		.private_value = _MAKE_NI_CONTROL(0x01, 0x03),
  	},
  	{
  		.name = "Direct Thru Channel B",
  		.private_value = _MAKE_NI_CONTROL(0x01, 0x05),
  	},
  	{
  		.name = "Phono Input Channel A",
  		.private_value = _MAKE_NI_CONTROL(0x02, 0x03),
  	},
  	{
  		.name = "Phono Input Channel B",
  		.private_value = _MAKE_NI_CONTROL(0x02, 0x05),
  	},
  };
  
  static struct snd_kcontrol_new snd_nativeinstruments_ta10_mixers[] = {
  	{
  		.name = "Direct Thru Channel A",
  		.private_value = _MAKE_NI_CONTROL(0x01, 0x03),
  	},
  	{
  		.name = "Direct Thru Channel B",
  		.private_value = _MAKE_NI_CONTROL(0x01, 0x05),
  	},
  	{
  		.name = "Direct Thru Channel C",
  		.private_value = _MAKE_NI_CONTROL(0x01, 0x07),
  	},
  	{
  		.name = "Direct Thru Channel D",
  		.private_value = _MAKE_NI_CONTROL(0x01, 0x09),
  	},
  	{
  		.name = "Phono Input Channel A",
  		.private_value = _MAKE_NI_CONTROL(0x02, 0x03),
  	},
  	{
  		.name = "Phono Input Channel B",
  		.private_value = _MAKE_NI_CONTROL(0x02, 0x05),
  	},
  	{
  		.name = "Phono Input Channel C",
  		.private_value = _MAKE_NI_CONTROL(0x02, 0x07),
  	},
  	{
  		.name = "Phono Input Channel D",
  		.private_value = _MAKE_NI_CONTROL(0x02, 0x09),
  	},
  };
  
  static int snd_nativeinstruments_create_mixer(struct usb_mixer_interface *mixer,
  					      const struct snd_kcontrol_new *kc,
  					      unsigned int count)
  {
  	int i, err = 0;
  	struct snd_kcontrol_new template = {
  		.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
  		.access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
  		.get = snd_nativeinstruments_control_get,
  		.put = snd_nativeinstruments_control_put,
  		.info = snd_ctl_boolean_mono_info,
  	};
  
  	for (i = 0; i < count; i++) {
  		struct snd_kcontrol *c;
  
  		template.name = kc[i].name;
  		template.private_value = kc[i].private_value;
  
  		c = snd_ctl_new1(&template, mixer);
  		err = snd_ctl_add(mixer->chip->card, c);
  
  		if (err < 0)
  			break;
  	}
  
  	return err;
  }

  /* M-Audio FastTrack Ultra quirks */
  
  /* private_free callback */
  static void usb_mixer_elem_free(struct snd_kcontrol *kctl)
  {
  	kfree(kctl->private_data);
  	kctl->private_data = NULL;
  }
  
  static int snd_maudio_ftu_create_ctl(struct usb_mixer_interface *mixer,
  				     int in, int out, const char *name)
  {
  	struct usb_mixer_elem_info *cval;
  	struct snd_kcontrol *kctl;
  
  	cval = kzalloc(sizeof(*cval), GFP_KERNEL);
  	if (!cval)
  		return -ENOMEM;
  
  	cval->id = 5;
  	cval->mixer = mixer;
  	cval->val_type = USB_MIXER_S16;
  	cval->channels = 1;
  	cval->control = out + 1;
  	cval->cmask = 1 << in;
  
  	kctl = snd_ctl_new1(snd_usb_feature_unit_ctl, cval);
  	if (!kctl) {
  		kfree(cval);
  		return -ENOMEM;
  	}
  
  	snprintf(kctl->id.name, sizeof(kctl->id.name), name);
  	kctl->private_free = usb_mixer_elem_free;
  	return snd_usb_mixer_add_control(mixer, kctl);
  }
  
  static int snd_maudio_ftu_create_mixer(struct usb_mixer_interface *mixer)
  {
  	char name[64];
  	int in, out, err;
  
  	for (out = 0; out < 8; out++) {
  		for (in = 0; in < 8; in++) {
  			snprintf(name, sizeof(name),
  				 "AIn%d - Out%d Capture Volume", in  + 1, out + 1);
  			err = snd_maudio_ftu_create_ctl(mixer, in, out, name);
  			if (err < 0)
  				return err;
  		}
  
  		for (in = 8; in < 16; in++) {
  			snprintf(name, sizeof(name),
  				 "DIn%d - Out%d Playback Volume", in - 7, out + 1);
  			err = snd_maudio_ftu_create_ctl(mixer, in, out, name);
  			if (err < 0)
  				return err;
  		}
  	}
  
  	return 0;
  }

  void snd_emuusb_set_samplerate(struct snd_usb_audio *chip,
  			       unsigned char samplerate_id)
  {
  	struct usb_mixer_interface *mixer;
  	struct usb_mixer_elem_info *cval;
  	int unitid = 12; /* SamleRate ExtensionUnit ID */
  
  	list_for_each_entry(mixer, &chip->mixer_list, list) {
  		cval = mixer->id_elems[unitid];
  		if (cval) {
  			snd_usb_mixer_set_ctl_value(cval, UAC_SET_CUR,
  						    cval->control << 8,
  						    samplerate_id);
  			snd_usb_mixer_notify_id(mixer, unitid);
  		}
  		break;
  	}
  }
  
  int snd_usb_mixer_apply_create_quirk(struct usb_mixer_interface *mixer)
  {

  	int err = 0;

  	struct snd_info_entry *entry;
  
  	if ((err = snd_usb_soundblaster_remote_init(mixer)) < 0)
  		return err;

  	switch (mixer->chip->usb_id) {
  	case USB_ID(0x041e, 0x3020):
  	case USB_ID(0x041e, 0x3040):
  	case USB_ID(0x041e, 0x3042):

  	case USB_ID(0x041e, 0x30df):

  	case USB_ID(0x041e, 0x3048):
  		err = snd_audigy2nx_controls_create(mixer);
  		if (err < 0)
  			break;

  		if (!snd_card_proc_new(mixer->chip->card, "audigy2nx", &entry))
  			snd_info_set_text_ops(entry, mixer,
  					      snd_audigy2nx_proc_read);

  		break;

  	case USB_ID(0x0763, 0x2080): /* M-Audio Fast Track Ultra */
  	case USB_ID(0x0763, 0x2081): /* M-Audio Fast Track Ultra 8R */
  		err = snd_maudio_ftu_create_mixer(mixer);
  		break;

  	case USB_ID(0x0b05, 0x1739):
  	case USB_ID(0x0b05, 0x1743):

  		err = snd_xonar_u1_controls_create(mixer);

  		break;

  	case USB_ID(0x17cc, 0x1011): /* Traktor Audio 6 */

  		err = snd_nativeinstruments_create_mixer(mixer,
  				snd_nativeinstruments_ta6_mixers,
  				ARRAY_SIZE(snd_nativeinstruments_ta6_mixers));

  		break;

  	case USB_ID(0x17cc, 0x1021): /* Traktor Audio 10 */

  		err = snd_nativeinstruments_create_mixer(mixer,
  				snd_nativeinstruments_ta10_mixers,
  				ARRAY_SIZE(snd_nativeinstruments_ta10_mixers));

  		break;

  	}

  	return err;

  }
  
  void snd_usb_mixer_rc_memory_change(struct usb_mixer_interface *mixer,
  				    int unitid)
  {
  	if (!mixer->rc_cfg)
  		return;
  	/* unit ids specific to Extigy/Audigy 2 NX: */
  	switch (unitid) {
  	case 0: /* remote control */
  		mixer->rc_urb->dev = mixer->chip->dev;
  		usb_submit_urb(mixer->rc_urb, GFP_ATOMIC);
  		break;
  	case 4: /* digital in jack */
  	case 7: /* line in jacks */
  	case 19: /* speaker out jacks */
  	case 20: /* headphones out jack */
  		break;
  	/* live24ext: 4 = line-in jack */
  	case 3:	/* hp-out jack (may actuate Mute) */
  		if (mixer->chip->usb_id == USB_ID(0x041e, 0x3040) ||
  		    mixer->chip->usb_id == USB_ID(0x041e, 0x3048))
  			snd_usb_mixer_notify_id(mixer, mixer->rc_cfg->mute_mixer_id);
  		break;
  	default:
  		snd_printd(KERN_DEBUG "memory change in unknown unit %d
  ", unitid);
  		break;
  	}
  }