linux/sound/usb/usbaudio.h
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   1#ifndef __USBAUDIO_H
   2#define __USBAUDIO_H
   3/*
   4 *   (Tentative) USB Audio Driver for ALSA
   5 *
   6 *   Copyright (c) 2002 by Takashi Iwai <tiwai@suse.de>
   7 *
   8 *
   9 *   This program is free software; you can redistribute it and/or modify
  10 *   it under the terms of the GNU General Public License as published by
  11 *   the Free Software Foundation; either version 2 of the License, or
  12 *   (at your option) any later version.
  13 *
  14 *   This program is distributed in the hope that it will be useful,
  15 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  16 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17 *   GNU General Public License for more details.
  18 *
  19 *   You should have received a copy of the GNU General Public License
  20 *   along with this program; if not, write to the Free Software
  21 *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  22 */
  23
  24/* handling of USB vendor/product ID pairs as 32-bit numbers */
  25#define USB_ID(vendor, product) (((vendor) << 16) | (product))
  26#define USB_ID_VENDOR(id) ((id) >> 16)
  27#define USB_ID_PRODUCT(id) ((u16)(id))
  28
  29/*
  30 *
  31 */
  32
  33struct snd_usb_audio {
  34        int index;
  35        struct usb_device *dev;
  36        struct snd_card *card;
  37        struct usb_interface *pm_intf;
  38        u32 usb_id;
  39        struct mutex mutex;
  40        struct rw_semaphore shutdown_rwsem;
  41        unsigned int shutdown:1;
  42        unsigned int probing:1;
  43        unsigned int autosuspended:1;   
  44        unsigned int txfr_quirk:1; /* Subframe boundaries on transfers */
  45        
  46        int num_interfaces;
  47        int num_suspended_intf;
  48
  49        struct list_head pcm_list;      /* list of pcm streams */
  50        struct list_head ep_list;       /* list of audio-related endpoints */
  51        int pcm_devs;
  52
  53        struct list_head midi_list;     /* list of midi interfaces */
  54
  55        struct list_head mixer_list;    /* list of mixer interfaces */
  56
  57        int setup;                      /* from the 'device_setup' module param */
  58        int nrpacks;                    /* from the 'nrpacks' module param */
  59        int async_unlink;               /* from the 'async_unlink' module param */
  60
  61        struct usb_host_interface *ctrl_intf;   /* the audio control interface */
  62};
  63
  64/*
  65 * Information about devices with broken descriptors
  66 */
  67
  68/* special values for .ifnum */
  69#define QUIRK_NO_INTERFACE              -2
  70#define QUIRK_ANY_INTERFACE             -1
  71
  72enum quirk_type {
  73        QUIRK_IGNORE_INTERFACE,
  74        QUIRK_COMPOSITE,
  75        QUIRK_MIDI_STANDARD_INTERFACE,
  76        QUIRK_MIDI_FIXED_ENDPOINT,
  77        QUIRK_MIDI_YAMAHA,
  78        QUIRK_MIDI_MIDIMAN,
  79        QUIRK_MIDI_NOVATION,
  80        QUIRK_MIDI_RAW_BYTES,
  81        QUIRK_MIDI_EMAGIC,
  82        QUIRK_MIDI_CME,
  83        QUIRK_MIDI_AKAI,
  84        QUIRK_MIDI_US122L,
  85        QUIRK_MIDI_FTDI,
  86        QUIRK_AUDIO_STANDARD_INTERFACE,
  87        QUIRK_AUDIO_FIXED_ENDPOINT,
  88        QUIRK_AUDIO_EDIROL_UAXX,
  89        QUIRK_AUDIO_ALIGN_TRANSFER,
  90        QUIRK_AUDIO_STANDARD_MIXER,
  91
  92        QUIRK_TYPE_COUNT
  93};
  94
  95struct snd_usb_audio_quirk {
  96        const char *vendor_name;
  97        const char *product_name;
  98        int16_t ifnum;
  99        uint16_t type;
 100        const void *data;
 101};
 102
 103#define combine_word(s)    ((*(s)) | ((unsigned int)(s)[1] << 8))
 104#define combine_triple(s)  (combine_word(s) | ((unsigned int)(s)[2] << 16))
 105#define combine_quad(s)    (combine_triple(s) | ((unsigned int)(s)[3] << 24))
 106
 107#endif /* __USBAUDIO_H */
 108
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