sound/usb/usbaudio.h

   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
  33 struct snd_usb_audio {
  34         int index;
  35         struct usb_device *dev;
  36         struct snd_card *card;
  37         u32 usb_id;
  38         int shutdown;
  39         unsigned int txfr_quirk:1; /* Subframe boundaries on transfers */
  40         int num_interfaces;
  41         int num_suspended_intf;
  42
  43         struct list_head pcm_list;      /* list of pcm streams */
  44         int pcm_devs;
  45
  46         struct list_head midi_list;     /* list of midi interfaces */
  47
  48         struct list_head mixer_list;    /* list of mixer interfaces */
  49
  50         int setup;                      /* from the 'device_setup' module param */
  51         int nrpacks;                    /* from the 'nrpacks' module param */
  52         int async_unlink;               /* from the 'async_unlink' module param */
  53
  54         struct usb_host_interface *ctrl_intf;   /* the audio control interface */
  55 };
  56
  57 /*
  58  * Information about devices with broken descriptors
  59  */
  60
  61 /* special values for .ifnum */
  62 #define QUIRK_NO_INTERFACE              -2
  63 #define QUIRK_ANY_INTERFACE             -1
  64
  65 enum quirk_type {
  66         QUIRK_IGNORE_INTERFACE,
  67         QUIRK_COMPOSITE,
  68         QUIRK_MIDI_STANDARD_INTERFACE,
  69         QUIRK_MIDI_FIXED_ENDPOINT,
  70         QUIRK_MIDI_YAMAHA,
  71         QUIRK_MIDI_MIDIMAN,
  72         QUIRK_MIDI_NOVATION,
  73         QUIRK_MIDI_FASTLANE,
  74         QUIRK_MIDI_EMAGIC,
  75         QUIRK_MIDI_CME,
  76         QUIRK_MIDI_AKAI,
  77         QUIRK_MIDI_US122L,
  78         QUIRK_AUDIO_STANDARD_INTERFACE,
  79         QUIRK_AUDIO_FIXED_ENDPOINT,
  80         QUIRK_AUDIO_EDIROL_UAXX,
  81         QUIRK_AUDIO_ALIGN_TRANSFER,
  82
  83         QUIRK_TYPE_COUNT
  84 };
  85
  86 struct snd_usb_audio_quirk {
  87         const char *vendor_name;
  88         const char *product_name;
  89         int16_t ifnum;
  90         uint16_t type;
  91         const void *data;
  92 };
  93
  94 #define combine_word(s)    ((*(s)) | ((unsigned int)(s)[1] << 8))
  95 #define combine_triple(s)  (combine_word(s) | ((unsigned int)(s)[2] << 16))
  96 #define combine_quad(s)    (combine_triple(s) | ((unsigned int)(s)[3] << 24))
  97
  98 #endif /* __USBAUDIO_H */