/*
 *   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/control.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"
#include "stream.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_interface(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 > MAX_NR_RATES) {
                kfree(fp);
                return -EINVAL;
        }
        if (fp->nr_rates > 0) {
                rate_table = kmemdup(fp->rate_table,
                                     sizeof(int) * fp->nr_rates, GFP_KERNEL);
                if (!rate_table) {
                        kfree(fp);
                        return -ENOMEM;
                }
                fp->rate_table = rate_table;
        }

        stream = (fp->endpoint & USB_DIR_IN)
                ? SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK;
        err = snd_usb_add_audio_stream(chip, stream, fp);
        if (err < 0) {
                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 = kmemdup(&ua_format, sizeof(*fp), GFP_KERNEL);
        if (!fp)
                return -ENOMEM;

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

        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_stream(chip, stream, fp);
        if (err < 0) {
                kfree(fp);
                return err;
        }
        usb_set_interface(chip->dev, fp->iface, 0);
        return 0;
}

/*
 * Create a standard mixer for the specified interface.
 */
static int create_standard_mixer_quirk(struct snd_usb_audio *chip,
                                       struct usb_interface *iface,
                                       struct usb_driver *driver,
                                       const struct snd_usb_audio_quirk *quirk)
{
        if (quirk->ifnum < 0)
                return 0;

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

/*
 * 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_MIDI_FTDI] = create_any_midi_quirk,
                [QUIRK_AUDIO_STANDARD_INTERFACE] = create_standard_audio_quirk,
                [QUIRK_AUDIO_FIXED_ENDPOINT] = create_fixed_stream_quirk,
                [QUIRK_AUDIO_EDIROL_UAXX] = create_uaxx_quirk,
                [QUIRK_AUDIO_ALIGN_TRANSFER] = create_align_transfer_quirk,
                [QUIRK_AUDIO_STANDARD_MIXER] = create_standard_mixer_quirk,
        };

        if (quirk->type < QUIRK_TYPE_COUNT) {
                return quirk_funcs[quirk->type](chip, iface, driver, quirk);
        } else {
                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);
                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);
        if (buf == 0) {
                snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0), 0x29,
                                USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_OTHER,
                                1, 2000, NULL, 0);
                return -ENODEV;
        }
        return 0;
}

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

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

        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);
}

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  = 0, reg;
        int val[] = {0x2004, 0x3000, 0xf800, 0x143f, 0x0000, 0x3000};

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

        return err;
}

/*
 * 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 MAUDIO_SET              0x01 /* parse device_setup */
#define MAUDIO_SET_COMPATIBLE   0x80 /* use only "win-compatible" interfaces */
#define MAUDIO_SET_DTS          0x02 /* enable DTS Digital Output */
#define MAUDIO_SET_96K          0x04 /* 48-96KHz rate if set, 8-48KHz otherwise */
#define MAUDIO_SET_24B          0x08 /* 24bits sample if set, 16bits otherwise */
#define MAUDIO_SET_DI           0x10 /* enable Digital Input */
#define MAUDIO_SET_MASK         0x1f /* bit mask for setup value */
#define MAUDIO_SET_24B_48K_DI    0x19 /* 24bits+48KHz+Digital Input */
#define MAUDIO_SET_24B_48K_NOTDI 0x09 /* 24bits+48KHz+No Digital Input */
#define MAUDIO_SET_16B_48K_DI    0x11 /* 16bits+48KHz+Digital Input */
#define MAUDIO_SET_16B_48K_NOTDI 0x01 /* 16bits+48KHz+No Digital Input */

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

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

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

        return 0; /* keep this altsetting */
}


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

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

        snd_printdd(KERN_INFO
                    "using altsetting %d for interface %d config %d\n",
                    altno, iface, chip->setup);
        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);
        /* quattro usb: skip altsets incompatible with device_setup */
        if (chip->usb_id == USB_ID(0x0763, 0x2001))
                return quattro_skip_setting_quirk(chip, iface, altno);
        /* fasttrackpro usb: skip altsets incompatible with device_setup */
        if (chip->usb_id == USB_ID(0x0763, 0x2012))
                return fasttrackpro_skip_setting_quirk(chip, iface, altno);

        return 0;
}

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 */
        case USB_ID(0x0ccd, 0x00b1): /* Terratec Aureon 7.1 USB */
                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, 0x1000): /* Komplete Audio 6 */
        case USB_ID(0x17cc, 0x1010): /* Traktor Audio 6 */
        case USB_ID(0x17cc, 0x1020): /* Traktor Audio 10 */
                return snd_usb_nativeinstruments_boot_quirk(dev);
        case USB_ID(0x0763, 0x2012):  /* M-Audio Fast Track Pro USB */
                return snd_usb_fasttrackpro_boot_quirk(dev);
        }

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

/*
 * 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;
        }
}

void snd_usb_endpoint_start_quirk(struct snd_usb_endpoint *ep)
{
        /*
         * "Playback Design" products send bogus feedback data at the start
         * of the stream. Ignore them.
         */
        if ((le16_to_cpu(ep->chip->dev->descriptor.idVendor) == 0x23ba) &&
            ep->type == SND_USB_ENDPOINT_TYPE_SYNC)
                ep->skip_packets = 4;
}

void snd_usb_ctl_msg_quirk(struct usb_device *dev, unsigned int pipe,
                           __u8 request, __u8 requesttype, __u16 value,
                           __u16 index, void *data, __u16 size)
{
        /*
         * "Playback Design" products need a 20ms delay after each
         * class compliant request
         */
        if ((le16_to_cpu(dev->descriptor.idVendor) == 0x23ba) &&
            (requesttype & USB_TYPE_MASK) == USB_TYPE_CLASS)
                mdelay(20);
}