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         struct usb_interface *pm_intf;
  38         u32 usb_id;
  39         struct rw_semaphore shutdown_rwsem;
  40         unsigned int shutdown:1;
  41         unsigned int probing:1;
  42         unsigned int autosuspended:1;
  43         unsigned int txfr_quirk:1; /* Subframe boundaries on transfers */
  44
  45         int num_interfaces;
  46         int num_suspended_intf;
  47
  48         struct list_head pcm_list;      /* list of pcm streams */
  49         int pcm_devs;
  50
  51         struct list_head midi_list;     /* list of midi interfaces */
  52
  53         struct list_head mixer_list;    /* list of mixer interfaces */
  54
  55         int setup;                      /* from the 'device_setup' module param */
  56         int nrpacks;                    /* from the 'nrpacks' module param */
  57         int async_unlink;               /* from the 'async_unlink' module param */
  58
  59         struct usb_host_interface *ctrl_intf;   /* the audio control interface */
  60 };
  61
  62 /*
  63  * Information about devices with broken descriptors
  64  */
  65
  66 /* special values for .ifnum */
  67 #define QUIRK_NO_INTERFACE              -2
  68 #define QUIRK_ANY_INTERFACE             -1
  69
  70 enum quirk_type {
  71         QUIRK_IGNORE_INTERFACE,
  72         QUIRK_COMPOSITE,
  73         QUIRK_MIDI_STANDARD_INTERFACE,
  74         QUIRK_MIDI_FIXED_ENDPOINT,
  75         QUIRK_MIDI_YAMAHA,
  76         QUIRK_MIDI_MIDIMAN,
  77         QUIRK_MIDI_NOVATION,
  78         QUIRK_MIDI_RAW_BYTES,
  79         QUIRK_MIDI_EMAGIC,
  80         QUIRK_MIDI_CME,
  81         QUIRK_MIDI_AKAI,
  82         QUIRK_MIDI_US122L,
  83         QUIRK_MIDI_FTDI,
  84         QUIRK_AUDIO_STANDARD_INTERFACE,
  85         QUIRK_AUDIO_FIXED_ENDPOINT,
  86         QUIRK_AUDIO_EDIROL_UAXX,
  87         QUIRK_AUDIO_ALIGN_TRANSFER,
  88         QUIRK_AUDIO_STANDARD_MIXER,
  89
  90         QUIRK_TYPE_COUNT
  91 };
  92
  93 struct snd_usb_audio_quirk {
  94         const char *vendor_name;
  95         const char *product_name;
  96         int16_t ifnum;
  97         uint16_t type;
  98         const void *data;
  99 };
 100
 101 #define combine_word(s)    ((*(s)) | ((unsigned int)(s)[1] << 8))
 102 #define combine_triple(s)  (combine_word(s) | ((unsigned int)(s)[2] << 16))
 103 #define combine_quad(s)    (combine_triple(s) | ((unsigned int)(s)[3] << 24))
 104
 105 #endif /* __USBAUDIO_H */