text: /*
   *   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)
   *
   *   Audio Advantage Micro II support added by:
   *	    Przemek Rudy (prudy1@o2.pl)
   *
   *   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/asoundef.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;
  
  struct std_mono_table {
  	unsigned int unitid, control, cmask;
  	int val_type;
  	const char *name;
  	snd_kcontrol_tlv_rw_t *tlv_callback;
  };
  
  /* private_free callback */
  static void usb_mixer_elem_free(struct snd_kcontrol *kctl)
  {
  	kfree(kctl->private_data);
  	kctl->private_data = NULL;
  }
  
  /* This function allows for the creation of standard UAC controls.
   * See the quirks for M-Audio FTUs or Ebox-44.
   * If you don't want to set a TLV callback pass NULL.
   *
   * Since there doesn't seem to be a devices that needs a multichannel
   * version, we keep it mono for simplicity.
   */
  static int snd_create_std_mono_ctl_offset(struct usb_mixer_interface *mixer,
  				unsigned int unitid,
  				unsigned int control,
  				unsigned int cmask,
  				int val_type,
  				unsigned int idx_off,
  				const char *name,
  				snd_kcontrol_tlv_rw_t *tlv_callback)
  {
  	int err;
  	struct usb_mixer_elem_info *cval;
  	struct snd_kcontrol *kctl;
  
  	cval = kzalloc(sizeof(*cval), GFP_KERNEL);
  	if (!cval)
  		return -ENOMEM;
  
  	cval->id = unitid;
  	cval->mixer = mixer;
  	cval->val_type = val_type;
  	cval->channels = 1;
  	cval->control = control;
  	cval->cmask = cmask;
  	cval->idx_off = idx_off;
  
  	/* get_min_max() is called only for integer volumes later,
  	 * so provide a short-cut for booleans */
  	cval->min = 0;
  	cval->max = 1;
  	cval->res = 0;
  	cval->dBmin = 0;
  	cval->dBmax = 0;
  
  	/* Create control */
  	kctl = snd_ctl_new1(snd_usb_feature_unit_ctl, cval);
  	if (!kctl) {
  		kfree(cval);
  		return -ENOMEM;
  	}
  
  	/* Set name */
  	snprintf(kctl->id.name, sizeof(kctl->id.name), name);
  	kctl->private_free = usb_mixer_elem_free;
  
  	/* set TLV */
  	if (tlv_callback) {
  		kctl->tlv.c = tlv_callback;
  		kctl->vd[0].access |=
  			SNDRV_CTL_ELEM_ACCESS_TLV_READ |
  			SNDRV_CTL_ELEM_ACCESS_TLV_CALLBACK;
  	}
  	/* Add control to mixer */
  	err = snd_usb_mixer_add_control(mixer, kctl);
  	if (err < 0)
  		return err;
  
  	return 0;
  }
  
  static int snd_create_std_mono_ctl(struct usb_mixer_interface *mixer,
  				unsigned int unitid,
  				unsigned int control,
  				unsigned int cmask,
  				int val_type,
  				const char *name,
  				snd_kcontrol_tlv_rw_t *tlv_callback)
  {
  	return snd_create_std_mono_ctl_offset(mixer, unitid, control, cmask,
  		val_type, 0 /* Offset */, name, tlv_callback);
  }
  
  /*
   * Create a set of standard UAC controls from a table
   */
  static int snd_create_std_mono_table(struct usb_mixer_interface *mixer,
  				struct std_mono_table *t)
  {
  	int err;
  
  	while (t->name != NULL) {
  		err = snd_create_std_mono_ctl(mixer, t->unitid, t->control,
  				t->cmask, t->val_type, t->name, t->tlv_callback);
  		if (err < 0)
  			return err;
  		t++;
  	}
  
  	return 0;
  }
  
  /*
   * 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, 0x3237), 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];
  	down_read(&mixer->chip->shutdown_rwsem);
  	if (mixer->chip->shutdown) {
  		err = -ENODEV;
  		goto out;
  	}
  	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);
   out:
  	up_read(&mixer->chip->shutdown_rwsem);
  	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\n\n", 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);
  		down_read(&mixer->chip->shutdown_rwsem);
  		if (mixer->chip->shutdown)
  			err = 0;
  		else
  			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);
  		up_read(&mixer->chip->shutdown_rwsem);
  		if (err == 3 && (buf[0] == 3 || buf[0] == 6))
  			snd_iprintf(buffer, "%02x %02x\n", buf[1], buf[2]);
  		else
  			snd_iprintf(buffer, "?\n");
  	}
  }
  
  /* EMU0204 */
  static int snd_emu0204_ch_switch_info(struct snd_kcontrol *kcontrol,
  				      struct snd_ctl_elem_info *uinfo)
  {
  	static const char *texts[2] = {"1/2",
  				       "3/4"
  	};
  
  	uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
  	uinfo->count = 1;
  	uinfo->value.enumerated.items = 2;
  	if (uinfo->value.enumerated.item > 1)
  		uinfo->value.enumerated.item = 1;
  	strcpy(uinfo->value.enumerated.name,
  		texts[uinfo->value.enumerated.item]);
  
  	return 0;
  }
  
  static int snd_emu0204_ch_switch_get(struct snd_kcontrol *kcontrol,
  				     struct snd_ctl_elem_value *ucontrol)
  {
  	ucontrol->value.enumerated.item[0] = kcontrol->private_value;
  	return 0;
  }
  
  static int snd_emu0204_ch_switch_put(struct snd_kcontrol *kcontrol,
  				     struct snd_ctl_elem_value *ucontrol)
  {
  	struct usb_mixer_interface *mixer = snd_kcontrol_chip(kcontrol);
  	unsigned int value = ucontrol->value.enumerated.item[0];
  	int err, changed;
  	unsigned char buf[2];
  
  	if (value > 1)
  		return -EINVAL;
  
  	buf[0] = 0x01;
  	buf[1] = value ? 0x02 : 0x01;
  
  	changed = value != kcontrol->private_value;
  	down_read(&mixer->chip->shutdown_rwsem);
  	if (mixer->chip->shutdown) {
  		err = -ENODEV;
  		goto out;
  	}
  	err = snd_usb_ctl_msg(mixer->chip->dev,
  		      usb_sndctrlpipe(mixer->chip->dev, 0), UAC_SET_CUR,
  		      USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_OUT,
  		      0x0400, 0x0e00, buf, 2);
   out:
  	up_read(&mixer->chip->shutdown_rwsem);
  	if (err < 0)
  		return err;
  	kcontrol->private_value = value;
  	return changed;
  }
  
  
  static struct snd_kcontrol_new snd_emu0204_controls[] = {
  	{
  		.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
  		.name = "Front Jack Channels",
  		.info = snd_emu0204_ch_switch_info,
  		.get = snd_emu0204_ch_switch_get,
  		.put = snd_emu0204_ch_switch_put,
  		.private_value = 0,
  	},
  };
  
  static int snd_emu0204_controls_create(struct usb_mixer_interface *mixer)
  {
  	int i, err;
  
  	for (i = 0; i < ARRAY_SIZE(snd_emu0204_controls); ++i) {
  		err = snd_ctl_add(mixer->chip->card,
  			snd_ctl_new1(&snd_emu0204_controls[i], mixer));
  		if (err < 0)
  			return err;
  	}
  
  	return 0;
  }
  /* ASUS Xonar U1 / U3 controls */
  
  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;
  	down_read(&mixer->chip->shutdown_rwsem);
  	if (mixer->chip->shutdown)
  		err = -ENODEV;
  	else
  		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);
  	up_read(&mixer->chip->shutdown_rwsem);
  	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;
  
  	down_read(&mixer->chip->shutdown_rwsem);
  	if (mixer->chip->shutdown)
  		ret = -ENODEV;
  	else
  		ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), bRequest,
  				  USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN,
  				  0, wIndex,
  				  &tmp, sizeof(tmp), 1000);
  	up_read(&mixer->chip->shutdown_rwsem);
  
  	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;
  
  	down_read(&mixer->chip->shutdown_rwsem);
  	if (mixer->chip->shutdown)
  		ret = -ENODEV;
  	else
  		ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), bRequest,
  				  USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT,
  				  wValue, wIndex,
  				  NULL, 0, 1000);
  	up_read(&mixer->chip->shutdown_rwsem);
  
  	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 */
  /* FTU Effect switch (also used by C400/C600) */
  struct snd_ftu_eff_switch_priv_val {
  	struct usb_mixer_interface *mixer;
  	int cached_value;
  	int is_cached;
  	int bUnitID;
  	int validx;
  };
  
  static int snd_ftu_eff_switch_info(struct snd_kcontrol *kcontrol,
  					struct snd_ctl_elem_info *uinfo)
  {
  	static const char *texts[8] = {"Room 1",
  				       "Room 2",
  				       "Room 3",
  				       "Hall 1",
  				       "Hall 2",
  				       "Plate",
  				       "Delay",
  				       "Echo"
  	};
  
  	uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
  	uinfo->count = 1;
  	uinfo->value.enumerated.items = 8;
  	if (uinfo->value.enumerated.item > 7)
  		uinfo->value.enumerated.item = 7;
  	strcpy(uinfo->value.enumerated.name,
  		texts[uinfo->value.enumerated.item]);
  
  	return 0;
  }
  
  static int snd_ftu_eff_switch_get(struct snd_kcontrol *kctl,
  					struct snd_ctl_elem_value *ucontrol)
  {
  	struct snd_usb_audio *chip;
  	struct usb_mixer_interface *mixer;
  	struct snd_ftu_eff_switch_priv_val *pval;
  	int err;
  	unsigned char value[2];
  	int id, validx;
  
  	const int val_len = 2;
  
  	value[0] = 0x00;
  	value[1] = 0x00;
  
  	pval = (struct snd_ftu_eff_switch_priv_val *)
  		kctl->private_value;
  
  	if (pval->is_cached) {
  		ucontrol->value.enumerated.item[0] = pval->cached_value;
  		return 0;
  	}
  
  	mixer = (struct usb_mixer_interface *) pval->mixer;
  	if (snd_BUG_ON(!mixer))
  		return -EINVAL;
  
  	chip = (struct snd_usb_audio *) mixer->chip;
  	if (snd_BUG_ON(!chip))
  		return -EINVAL;
  
  	id = pval->bUnitID;
  	validx = pval->validx;
  
  	down_read(&mixer->chip->shutdown_rwsem);
  	if (mixer->chip->shutdown)
  		err = -ENODEV;
  	else
  		err = snd_usb_ctl_msg(chip->dev,
  			usb_rcvctrlpipe(chip->dev, 0), UAC_GET_CUR,
  			USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN,
  			validx << 8, snd_usb_ctrl_intf(chip) | (id << 8),
  			value, val_len);
  	up_read(&mixer->chip->shutdown_rwsem);
  	if (err < 0)
  		return err;
  
  	ucontrol->value.enumerated.item[0] = value[0];
  	pval->cached_value = value[0];
  	pval->is_cached = 1;
  
  	return 0;
  }
  
  static int snd_ftu_eff_switch_put(struct snd_kcontrol *kctl,
  					struct snd_ctl_elem_value *ucontrol)
  {
  	struct snd_usb_audio *chip;
  	struct snd_ftu_eff_switch_priv_val *pval;
  
  	struct usb_mixer_interface *mixer;
  	int changed, cur_val, err, new_val;
  	unsigned char value[2];
  	int id, validx;
  
  	const int val_len = 2;
  
  	changed = 0;
  
  	pval = (struct snd_ftu_eff_switch_priv_val *)
  		kctl->private_value;
  	cur_val = pval->cached_value;
  	new_val = ucontrol->value.enumerated.item[0];
  
  	mixer = (struct usb_mixer_interface *) pval->mixer;
  	if (snd_BUG_ON(!mixer))
  		return -EINVAL;
  
  	chip = (struct snd_usb_audio *) mixer->chip;
  	if (snd_BUG_ON(!chip))
  		return -EINVAL;
  
  	id = pval->bUnitID;
  	validx = pval->validx;
  
  	if (!pval->is_cached) {
  		/* Read current value */
  		down_read(&mixer->chip->shutdown_rwsem);
  		if (mixer->chip->shutdown)
  			err = -ENODEV;
  		else
  			err = snd_usb_ctl_msg(chip->dev,
  				usb_rcvctrlpipe(chip->dev, 0), UAC_GET_CUR,
  				USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_IN,
  				validx << 8, snd_usb_ctrl_intf(chip) | (id << 8),
  				value, val_len);
  		up_read(&mixer->chip->shutdown_rwsem);
  		if (err < 0)
  			return err;
  
  		cur_val = value[0];
  		pval->cached_value = cur_val;
  		pval->is_cached = 1;
  	}
  	/* update value if needed */
  	if (cur_val != new_val) {
  		value[0] = new_val;
  		value[1] = 0;
  		down_read(&mixer->chip->shutdown_rwsem);
  		if (mixer->chip->shutdown)
  			err = -ENODEV;
  		else
  			err = snd_usb_ctl_msg(chip->dev,
  				usb_sndctrlpipe(chip->dev, 0), UAC_SET_CUR,
  				USB_RECIP_INTERFACE | USB_TYPE_CLASS | USB_DIR_OUT,
  				validx << 8, snd_usb_ctrl_intf(chip) | (id << 8),
  				value, val_len);
  		up_read(&mixer->chip->shutdown_rwsem);
  		if (err < 0)
  			return err;
  
  		pval->cached_value = new_val;
  		pval->is_cached = 1;
  		changed = 1;
  	}
  
  	return changed;
  }
  
  static void kctl_private_value_free(struct snd_kcontrol *kctl)
  {
  	kfree((void *)kctl->private_value);
  }
  
  static int snd_ftu_create_effect_switch(struct usb_mixer_interface *mixer,
  	int validx, int bUnitID)
  {
  	static struct snd_kcontrol_new template = {
  		.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
  		.name = "Effect Program Switch",
  		.index = 0,
  		.access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
  		.info = snd_ftu_eff_switch_info,
  		.get = snd_ftu_eff_switch_get,
  		.put = snd_ftu_eff_switch_put
  	};
  
  	int err;
  	struct snd_kcontrol *kctl;
  	struct snd_ftu_eff_switch_priv_val *pval;
  
  	pval = kzalloc(sizeof(*pval), GFP_KERNEL);
  	if (!pval)
  		return -ENOMEM;
  
  	pval->cached_value = 0;
  	pval->is_cached = 0;
  	pval->mixer = mixer;
  	pval->bUnitID = bUnitID;
  	pval->validx = validx;
  
  	template.private_value = (unsigned long) pval;
  	kctl = snd_ctl_new1(&template, mixer->chip);
  	if (!kctl) {
  		kfree(pval);
  		return -ENOMEM;
  	}
  
  	kctl->private_free = kctl_private_value_free;
  	err = snd_ctl_add(mixer->chip->card, kctl);
  	if (err < 0)
  		return err;
  
  	return 0;
  }
  
  /* Create volume controls for FTU devices*/
  static int snd_ftu_create_volume_ctls(struct usb_mixer_interface *mixer)
  {
  	char name[64];
  	unsigned int control, cmask;
  	int in, out, err;
  
  	const unsigned int id = 5;
  	const int val_type = USB_MIXER_S16;
  
  	for (out = 0; out < 8; out++) {
  		control = out + 1;
  		for (in = 0; in < 8; in++) {
  			cmask = 1 << in;
  			snprintf(name, sizeof(name),
  				"AIn%d - Out%d Capture Volume",
  				in  + 1, out + 1);
  			err = snd_create_std_mono_ctl(mixer, id, control,
  							cmask, val_type, name,
  							&snd_usb_mixer_vol_tlv);
  			if (err < 0)
  				return err;
  		}
  		for (in = 8; in < 16; in++) {
  			cmask = 1 << in;
  			snprintf(name, sizeof(name),
  				"DIn%d - Out%d Playback Volume",
  				in - 7, out + 1);
  			err = snd_create_std_mono_ctl(mixer, id, control,
  							cmask, val_type, name,
  							&snd_usb_mixer_vol_tlv);
  			if (err < 0)
  				return err;
  		}
  	}
  
  	return 0;
  }
  
  /* This control needs a volume quirk, see mixer.c */
  static int snd_ftu_create_effect_volume_ctl(struct usb_mixer_interface *mixer)
  {
  	static const char name[] = "Effect Volume";
  	const unsigned int id = 6;
  	const int val_type = USB_MIXER_U8;
  	const unsigned int control = 2;
  	const unsigned int cmask = 0;
  
  	return snd_create_std_mono_ctl(mixer, id, control, cmask, val_type,
  					name, snd_usb_mixer_vol_tlv);
  }
  
  /* This control needs a volume quirk, see mixer.c */
  static int snd_ftu_create_effect_duration_ctl(struct usb_mixer_interface *mixer)
  {
  	static const char name[] = "Effect Duration";
  	const unsigned int id = 6;
  	const int val_type = USB_MIXER_S16;
  	const unsigned int control = 3;
  	const unsigned int cmask = 0;
  
  	return snd_create_std_mono_ctl(mixer, id, control, cmask, val_type,
  					name, snd_usb_mixer_vol_tlv);
  }
  
  /* This control needs a volume quirk, see mixer.c */
  static int snd_ftu_create_effect_feedback_ctl(struct usb_mixer_interface *mixer)
  {
  	static const char name[] = "Effect Feedback Volume";
  	const unsigned int id = 6;
  	const int val_type = USB_MIXER_U8;
  	const unsigned int control = 4;
  	const unsigned int cmask = 0;
  
  	return snd_create_std_mono_ctl(mixer, id, control, cmask, val_type,
  					name, NULL);
  }
  
  static int snd_ftu_create_effect_return_ctls(struct usb_mixer_interface *mixer)
  {
  	unsigned int cmask;
  	int err, ch;
  	char name[48];
  
  	const unsigned int id = 7;
  	const int val_type = USB_MIXER_S16;
  	const unsigned int control = 7;
  
  	for (ch = 0; ch < 4; ++ch) {
  		cmask = 1 << ch;
  		snprintf(name, sizeof(name),
  			"Effect Return %d Volume", ch + 1);
  		err = snd_create_std_mono_ctl(mixer, id, control,
  						cmask, val_type, name,
  						snd_usb_mixer_vol_tlv);
  		if (err < 0)
  			return err;
  	}
  
  	return 0;
  }
  
  static int snd_ftu_create_effect_send_ctls(struct usb_mixer_interface *mixer)
  {
  	unsigned int  cmask;
  	int err, ch;
  	char name[48];
  
  	const unsigned int id = 5;
  	const int val_type = USB_MIXER_S16;
  	const unsigned int control = 9;
  
  	for (ch = 0; ch < 8; ++ch) {
  		cmask = 1 << ch;
  		snprintf(name, sizeof(name),
  			"Effect Send AIn%d Volume", ch + 1);
  		err = snd_create_std_mono_ctl(mixer, id, control, cmask,
  						val_type, name,
  						snd_usb_mixer_vol_tlv);
  		if (err < 0)
  			return err;
  	}
  	for (ch = 8; ch < 16; ++ch) {
  		cmask = 1 << ch;
  		snprintf(name, sizeof(name),
  			"Effect Send DIn%d Volume", ch - 7);
  		err = snd_create_std_mono_ctl(mixer, id, control, cmask,
  						val_type, name,
  						snd_usb_mixer_vol_tlv);
  		if (err < 0)
  			return err;
  	}
  	return 0;
  }
  
  static int snd_ftu_create_mixer(struct usb_mixer_interface *mixer)
  {
  	int err;
  
  	err = snd_ftu_create_volume_ctls(mixer);
  	if (err < 0)
  		return err;
  
  	err = snd_ftu_create_effect_switch(mixer, 1, 6);
  	if (err < 0)
  		return err;
  
  	err = snd_ftu_create_effect_volume_ctl(mixer);
  	if (err < 0)
  		return err;
  
  	err = snd_ftu_create_effect_duration_ctl(mixer);
  	if (err < 0)
  		return err;
  
  	err = snd_ftu_create_effect_feedback_ctl(mixer);
  	if (err < 0)
  		return err;
  
  	err = snd_ftu_create_effect_return_ctls(mixer);
  	if (err < 0)
  		return err;
  
  	err = snd_ftu_create_effect_send_ctls(mixer);
  	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;
  	}
  }
  
  /* M-Audio Fast Track C400/C600 */
  /* C400/C600 volume controls, this control needs a volume quirk, see mixer.c */
  static int snd_c400_create_vol_ctls(struct usb_mixer_interface *mixer)
  {
  	char name[64];
  	unsigned int cmask, offset;
  	int out, chan, err;
  	int num_outs = 0;
  	int num_ins = 0;
  
  	const unsigned int id = 0x40;
  	const int val_type = USB_MIXER_S16;
  	const int control = 1;
  
  	switch (mixer->chip->usb_id) {
  	case USB_ID(0x0763, 0x2030):
  		num_outs = 6;
  		num_ins = 4;
  		break;
  	case USB_ID(0x0763, 0x2031):
  		num_outs = 8;
  		num_ins = 6;
  		break;
  	}
  
  	for (chan = 0; chan < num_outs + num_ins; chan++) {
  		for (out = 0; out < num_outs; out++) {
  			if (chan < num_outs) {
  				snprintf(name, sizeof(name),
  					"PCM%d-Out%d Playback Volume",
  					chan + 1, out + 1);
  			} else {
  				snprintf(name, sizeof(name),
  					"In%d-Out%d Playback Volume",
  					chan - num_outs + 1, out + 1);
  			}
  
  			cmask = (out == 0) ? 0 : 1 << (out - 1);
  			offset = chan * num_outs;
  			err = snd_create_std_mono_ctl_offset(mixer, id, control,
  						cmask, val_type, offset, name,
  						&snd_usb_mixer_vol_tlv);
  			if (err < 0)
  				return err;
  		}
  	}
  
  	return 0;
  }
  
  /* This control needs a volume quirk, see mixer.c */
  static int snd_c400_create_effect_volume_ctl(struct usb_mixer_interface *mixer)
  {
  	static const char name[] = "Effect Volume";
  	const unsigned int id = 0x43;
  	const int val_type = USB_MIXER_U8;
  	const unsigned int control = 3;
  	const unsigned int cmask = 0;
  
  	return snd_create_std_mono_ctl(mixer, id, control, cmask, val_type,
  					name, snd_usb_mixer_vol_tlv);
  }
  
  /* This control needs a volume quirk, see mixer.c */
  static int snd_c400_create_effect_duration_ctl(struct usb_mixer_interface *mixer)
  {
  	static const char name[] = "Effect Duration";
  	const unsigned int id = 0x43;
  	const int val_type = USB_MIXER_S16;
  	const unsigned int control = 4;
  	const unsigned int cmask = 0;
  
  	return snd_create_std_mono_ctl(mixer, id, control, cmask, val_type,
  					name, snd_usb_mixer_vol_tlv);
  }
  
  /* This control needs a volume quirk, see mixer.c */
  static int snd_c400_create_effect_feedback_ctl(struct usb_mixer_interface *mixer)
  {
  	static const char name[] = "Effect Feedback Volume";
  	const unsigned int id = 0x43;
  	const int val_type = USB_MIXER_U8;
  	const unsigned int control = 5;
  	const unsigned int cmask = 0;
  
  	return snd_create_std_mono_ctl(mixer, id, control, cmask, val_type,
  					name, NULL);
  }
  
  static int snd_c400_create_effect_vol_ctls(struct usb_mixer_interface *mixer)
  {
  	char name[64];
  	unsigned int cmask;
  	int chan, err;
  	int num_outs = 0;
  	int num_ins = 0;
  
  	const unsigned int id = 0x42;
  	const int val_type = USB_MIXER_S16;
  	const int control = 1;
  
  	switch (mixer->chip->usb_id) {
  	case USB_ID(0x0763, 0x2030):
  		num_outs = 6;
  		num_ins = 4;
  		break;
  	case USB_ID(0x0763, 0x2031):
  		num_outs = 8;
  		num_ins = 6;
  		break;
  	}
  
  	for (chan = 0; chan < num_outs + num_ins; chan++) {
  		if (chan < num_outs) {
  			snprintf(name, sizeof(name),
  				"Effect Send DOut%d",
  				chan + 1);
  		} else {
  			snprintf(name, sizeof(name),
  				"Effect Send AIn%d",
  				chan - num_outs + 1);
  		}
  
  		cmask = (chan == 0) ? 0 : 1 << (chan - 1);
  		err = snd_create_std_mono_ctl(mixer, id, control,
  						cmask, val_type, name,
  						&snd_usb_mixer_vol_tlv);
  		if (err < 0)
  			return err;
  	}
  
  	return 0;
  }
  
  static int snd_c400_create_effect_ret_vol_ctls(struct usb_mixer_interface *mixer)
  {
  	char name[64];
  	unsigned int cmask;
  	int chan, err;
  	int num_outs = 0;
  	int offset = 0;
  
  	const unsigned int id = 0x40;
  	const int val_type = USB_MIXER_S16;
  	const int control = 1;
  
  	switch (mixer->chip->usb_id) {
  	case USB_ID(0x0763, 0x2030):
  		num_outs = 6;
  		offset = 0x3c;
  		/* { 0x3c, 0x43, 0x3e, 0x45, 0x40, 0x47 } */
  		break;
  	case USB_ID(0x0763, 0x2031):
  		num_outs = 8;
  		offset = 0x70;
  		/* { 0x70, 0x79, 0x72, 0x7b, 0x74, 0x7d, 0x76, 0x7f } */
  		break;
  	}
  
  	for (chan = 0; chan < num_outs; chan++) {
  		snprintf(name, sizeof(name),
  			"Effect Return %d",
  			chan + 1);
  
  		cmask = (chan == 0) ? 0 :
  			1 << (chan + (chan % 2) * num_outs - 1);
  		err = snd_create_std_mono_ctl_offset(mixer, id, control,
  						cmask, val_type, offset, name,
  						&snd_usb_mixer_vol_tlv);
  		if (err < 0)
  			return err;
  	}
  
  	return 0;
  }
  
  static int snd_c400_create_mixer(struct usb_mixer_interface *mixer)
  {
  	int err;
  
  	err = snd_c400_create_vol_ctls(mixer);
  	if (err < 0)
  		return err;
  
  	err = snd_c400_create_effect_vol_ctls(mixer);
  	if (err < 0)
  		return err;
  
  	err = snd_c400_create_effect_ret_vol_ctls(mixer);
  	if (err < 0)
  		return err;
  
  	err = snd_ftu_create_effect_switch(mixer, 2, 0x43);
  	if (err < 0)
  		return err;
  
  	err = snd_c400_create_effect_volume_ctl(mixer);
  	if (err < 0)
  		return err;
  
  	err = snd_c400_create_effect_duration_ctl(mixer);
  	if (err < 0)
  		return err;
  
  	err = snd_c400_create_effect_feedback_ctl(mixer);
  	if (err < 0)
  		return err;
  
  	return 0;
  }
  
  /*
   * The mixer units for Ebox-44 are corrupt, and even where they
   * are valid they presents mono controls as L and R channels of
   * stereo. So we provide a good mixer here.
   */
  static struct std_mono_table ebox44_table[] = {
  	{
  		.unitid = 4,
  		.control = 1,
  		.cmask = 0x0,
  		.val_type = USB_MIXER_INV_BOOLEAN,
  		.name = "Headphone Playback Switch"
  	},
  	{
  		.unitid = 4,
  		.control = 2,
  		.cmask = 0x1,
  		.val_type = USB_MIXER_S16,
  		.name = "Headphone A Mix Playback Volume"
  	},
  	{
  		.unitid = 4,
  		.control = 2,
  		.cmask = 0x2,
  		.val_type = USB_MIXER_S16,
  		.name = "Headphone B Mix Playback Volume"
  	},
  
  	{
  		.unitid = 7,
  		.control = 1,
  		.cmask = 0x0,
  		.val_type = USB_MIXER_INV_BOOLEAN,
  		.name = "Output Playback Switch"
  	},
  	{
  		.unitid = 7,
  		.control = 2,
  		.cmask = 0x1,
  		.val_type = USB_MIXER_S16,
  		.name = "Output A Playback Volume"
  	},
  	{
  		.unitid = 7,
  		.control = 2,
  		.cmask = 0x2,
  		.val_type = USB_MIXER_S16,
  		.name = "Output B Playback Volume"
  	},
  
  	{
  		.unitid = 10,
  		.control = 1,
  		.cmask = 0x0,
  		.val_type = USB_MIXER_INV_BOOLEAN,
  		.name = "Input Capture Switch"
  	},
  	{
  		.unitid = 10,
  		.control = 2,
  		.cmask = 0x1,
  		.val_type = USB_MIXER_S16,
  		.name = "Input A Capture Volume"
  	},
  	{
  		.unitid = 10,
  		.control = 2,
  		.cmask = 0x2,
  		.val_type = USB_MIXER_S16,
  		.name = "Input B Capture Volume"
  	},
  
  	{}
  };
  
  /* Audio Advantage Micro II findings:
   *
   * Mapping spdif AES bits to vendor register.bit:
   * AES0: [0 0 0 0 2.3 2.2 2.1 2.0] - default 0x00
   * AES1: [3.3 3.2.3.1.3.0 2.7 2.6 2.5 2.4] - default: 0x01
   * AES2: [0 0 0 0 0 0 0 0]
   * AES3: [0 0 0 0 0 0 x 0] - 'x' bit is set basing on standard usb request
   *                           (UAC_EP_CS_ATTR_SAMPLE_RATE) for Audio Devices
   *
   * power on values:
   * r2: 0x10
   * r3: 0x20 (b7 is zeroed just before playback (except IEC61937) and set
   *           just after it to 0xa0, presumably it disables/mutes some analog
   *           parts when there is no audio.)
   * r9: 0x28
   *
   * Optical transmitter on/off:
   * vendor register.bit: 9.1
   * 0 - on (0x28 register value)
   * 1 - off (0x2a register value)
   *
   */
  static int snd_microii_spdif_info(struct snd_kcontrol *kcontrol,
  	struct snd_ctl_elem_info *uinfo)
  {
  	uinfo->type = SNDRV_CTL_ELEM_TYPE_IEC958;
  	uinfo->count = 1;
  	return 0;
  }
  
  static int snd_microii_spdif_default_get(struct snd_kcontrol *kcontrol,
  	struct snd_ctl_elem_value *ucontrol)
  {
  	struct usb_mixer_interface *mixer = snd_kcontrol_chip(kcontrol);
  	int err;
  	struct usb_interface *iface;
  	struct usb_host_interface *alts;
  	unsigned int ep;
  	unsigned char data[3];
  	int rate;
  
  	ucontrol->value.iec958.status[0] = kcontrol->private_value & 0xff;
  	ucontrol->value.iec958.status[1] = (kcontrol->private_value >> 8) & 0xff;
  	ucontrol->value.iec958.status[2] = 0x00;
  
  	/* use known values for that card: interface#1 altsetting#1 */
  	iface = usb_ifnum_to_if(mixer->chip->dev, 1);
  	alts = &iface->altsetting[1];
  	ep = get_endpoint(alts, 0)->bEndpointAddress;
  
  	err = snd_usb_ctl_msg(mixer->chip->dev,
  			usb_rcvctrlpipe(mixer->chip->dev, 0),
  			UAC_GET_CUR,
  			USB_TYPE_CLASS | USB_RECIP_ENDPOINT | USB_DIR_IN,
  			UAC_EP_CS_ATTR_SAMPLE_RATE << 8,
  			ep,
  			data,
  			sizeof(data));
  	if (err < 0)
  		goto end;
  
  	rate = data[0] | (data[1] << 8) | (data[2] << 16);
  	ucontrol->value.iec958.status[3] = (rate == 48000) ?
  			IEC958_AES3_CON_FS_48000 : IEC958_AES3_CON_FS_44100;
  
  	err = 0;
  end:
  	return err;
  }
  
  static int snd_microii_spdif_default_put(struct snd_kcontrol *kcontrol,
  	struct snd_ctl_elem_value *ucontrol)
  {
  	struct usb_mixer_interface *mixer = snd_kcontrol_chip(kcontrol);
  	int err;
  	u8 reg;
  	unsigned long priv_backup = kcontrol->private_value;
  
  	reg = ((ucontrol->value.iec958.status[1] & 0x0f) << 4) |
  			(ucontrol->value.iec958.status[0] & 0x0f);
  	err = snd_usb_ctl_msg(mixer->chip->dev,
  			usb_sndctrlpipe(mixer->chip->dev, 0),
  			UAC_SET_CUR,
  			USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_OTHER,
  			reg,
  			2,
  			NULL,
  			0);
  	if (err < 0)
  		goto end;
  
  	kcontrol->private_value &= 0xfffff0f0;
  	kcontrol->private_value |= (ucontrol->value.iec958.status[1] & 0x0f) << 8;
  	kcontrol->private_value |= (ucontrol->value.iec958.status[0] & 0x0f);
  
  	reg = (ucontrol->value.iec958.status[0] & IEC958_AES0_NONAUDIO) ?
  			0xa0 : 0x20;
  	reg |= (ucontrol->value.iec958.status[1] >> 4) & 0x0f;
  	err = snd_usb_ctl_msg(mixer->chip->dev,
  			usb_sndctrlpipe(mixer->chip->dev, 0),
  			UAC_SET_CUR,
  			USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_OTHER,
  			reg,
  			3,
  			NULL,
  			0);
  	if (err < 0)
  		goto end;
  
  	kcontrol->private_value &= 0xffff0fff;
  	kcontrol->private_value |= (ucontrol->value.iec958.status[1] & 0xf0) << 8;
  
  	/* The frequency bits in AES3 cannot be set via register access. */
  
  	/* Silently ignore any bits from the request that cannot be set. */
  
  	err = (priv_backup != kcontrol->private_value);
  end:
  	return err;
  }
  
  static int snd_microii_spdif_mask_get(struct snd_kcontrol *kcontrol,
  	struct snd_ctl_elem_value *ucontrol)
  {
  	ucontrol->value.iec958.status[0] = 0x0f;
  	ucontrol->value.iec958.status[1] = 0xff;
  	ucontrol->value.iec958.status[2] = 0x00;
  	ucontrol->value.iec958.status[3] = 0x00;
  
  	return 0;
  }
  
  static int snd_microii_spdif_switch_get(struct snd_kcontrol *kcontrol,
  	struct snd_ctl_elem_value *ucontrol)
  {
  	ucontrol->value.integer.value[0] = !(kcontrol->private_value & 0x02);
  
  	return 0;
  }
  
  static int snd_microii_spdif_switch_put(struct snd_kcontrol *kcontrol,
  	struct snd_ctl_elem_value *ucontrol)
  {
  	struct usb_mixer_interface *mixer = snd_kcontrol_chip(kcontrol);
  	int err;
  	u8 reg = ucontrol->value.integer.value[0] ? 0x28 : 0x2a;
  
  	err = snd_usb_ctl_msg(mixer->chip->dev,
  			usb_sndctrlpipe(mixer->chip->dev, 0),
  			UAC_SET_CUR,
  			USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_OTHER,
  			reg,
  			9,
  			NULL,
  			0);
  
  	if (!err) {
  		err = (reg != (kcontrol->private_value & 0x0ff));
  		if (err)
  			kcontrol->private_value = reg;
  	}
  
  	return err;
  }
  
  static struct snd_kcontrol_new snd_microii_mixer_spdif[] = {
  	{
  		.iface =    SNDRV_CTL_ELEM_IFACE_PCM,
  		.name =     SNDRV_CTL_NAME_IEC958("", PLAYBACK, DEFAULT),
  		.info =     snd_microii_spdif_info,
  		.get =      snd_microii_spdif_default_get,
  		.put =      snd_microii_spdif_default_put,
  		.private_value = 0x00000100UL,/* reset value */
  	},
  	{
  		.access =   SNDRV_CTL_ELEM_ACCESS_READ,
  		.iface =    SNDRV_CTL_ELEM_IFACE_PCM,
  		.name =     SNDRV_CTL_NAME_IEC958("", PLAYBACK, MASK),
  		.info =     snd_microii_spdif_info,
  		.get =      snd_microii_spdif_mask_get,
  	},
  	{
  		.iface =    SNDRV_CTL_ELEM_IFACE_MIXER,
  		.name =     SNDRV_CTL_NAME_IEC958("", PLAYBACK, SWITCH),
  		.info =     snd_ctl_boolean_mono_info,
  		.get =      snd_microii_spdif_switch_get,
  		.put =      snd_microii_spdif_switch_put,
  		.private_value = 0x00000028UL,/* reset value */
  	}
  };
  
  static int snd_microii_controls_create(struct usb_mixer_interface *mixer)
  {
  	int err, i;
  
  	for (i = 0; i < ARRAY_SIZE(snd_microii_mixer_spdif); ++i) {
  		err = snd_ctl_add(mixer->chip->card,
  			snd_ctl_new1(&snd_microii_mixer_spdif[i], mixer));
  		if (err < 0)
  			return err;
  	}
  
  	return 0;
  }
  
  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;
  
  	/* EMU0204 */
  	case USB_ID(0x041e, 0x3f19):
  		err = snd_emu0204_controls_create(mixer);
  		if (err < 0)
  			break;
  		break;
  
  	case USB_ID(0x0763, 0x2030): /* M-Audio Fast Track C400 */
  	case USB_ID(0x0763, 0x2031): /* M-Audio Fast Track C400 */
  		err = snd_c400_create_mixer(mixer);
  		break;
  
  	case USB_ID(0x0763, 0x2080): /* M-Audio Fast Track Ultra */
  	case USB_ID(0x0763, 0x2081): /* M-Audio Fast Track Ultra 8R */
  		err = snd_ftu_create_mixer(mixer);
  		break;
  
  	case USB_ID(0x0b05, 0x1739): /* ASUS Xonar U1 */
  	case USB_ID(0x0b05, 0x1743): /* ASUS Xonar U1 (2) */
  	case USB_ID(0x0b05, 0x17a0): /* ASUS Xonar U3 */
  		err = snd_xonar_u1_controls_create(mixer);
  		break;
  
  	case USB_ID(0x0d8c, 0x0103): /* Audio Advantage Micro II */
  		err = snd_microii_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;
  
  	case USB_ID(0x200c, 0x1018): /* Electrix Ebox-44 */
  		/* detection is disabled in mixer_maps.c */
  		err = snd_create_std_mono_table(mixer, ebox44_table);
  		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\n", unitid);
  		break;
  	}
  }
  
  