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 mutex mutex;
  40         unsigned int autosuspended:1;
  41         atomic_t active;
  42         atomic_t shutdown;
  43         atomic_t usage_count;
  44         wait_queue_head_t shutdown_wait;
  45         unsigned int txfr_quirk:1; /* Subframe boundaries on transfers */
  46         unsigned int tx_length_quirk:1; /* Put length specifier in transfers */
  47
  48         int num_interfaces;
  49         int num_suspended_intf;
  50         int sample_rate_read_error;
  51
  52         struct list_head pcm_list;      /* list of pcm streams */
  53         struct list_head ep_list;       /* list of audio-related endpoints */
  54         int pcm_devs;
  55
  56         struct list_head midi_list;     /* list of midi interfaces */
  57
  58         struct list_head mixer_list;    /* list of mixer interfaces */
  59
  60         int setup;                      /* from the 'device_setup' module param */
  61         bool autoclock;                 /* from the 'autoclock' module param */
  62
  63         struct usb_host_interface *ctrl_intf;   /* the audio control interface */
  64 };
  65
  66 #define usb_audio_err(chip, fmt, args...) \
  67         dev_err(&(chip)->dev->dev, fmt, ##args)
  68 #define usb_audio_warn(chip, fmt, args...) \
  69         dev_warn(&(chip)->dev->dev, fmt, ##args)
  70 #define usb_audio_info(chip, fmt, args...) \
  71         dev_info(&(chip)->dev->dev, fmt, ##args)
  72 #define usb_audio_dbg(chip, fmt, args...) \
  73         dev_dbg(&(chip)->dev->dev, fmt, ##args)
  74
  75 /*
  76  * Information about devices with broken descriptors
  77  */
  78
  79 /* special values for .ifnum */
  80 #define QUIRK_NO_INTERFACE              -2
  81 #define QUIRK_ANY_INTERFACE             -1
  82
  83 enum quirk_type {
  84         QUIRK_IGNORE_INTERFACE,
  85         QUIRK_COMPOSITE,
  86         QUIRK_AUTODETECT,
  87         QUIRK_MIDI_STANDARD_INTERFACE,
  88         QUIRK_MIDI_FIXED_ENDPOINT,
  89         QUIRK_MIDI_YAMAHA,
  90         QUIRK_MIDI_ROLAND,
  91         QUIRK_MIDI_MIDIMAN,
  92         QUIRK_MIDI_NOVATION,
  93         QUIRK_MIDI_RAW_BYTES,
  94         QUIRK_MIDI_EMAGIC,
  95         QUIRK_MIDI_CME,
  96         QUIRK_MIDI_AKAI,
  97         QUIRK_MIDI_US122L,
  98         QUIRK_MIDI_FTDI,
  99         QUIRK_MIDI_CH345,
 100         QUIRK_AUDIO_STANDARD_INTERFACE,
 101         QUIRK_AUDIO_FIXED_ENDPOINT,
 102         QUIRK_AUDIO_EDIROL_UAXX,
 103         QUIRK_AUDIO_ALIGN_TRANSFER,
 104         QUIRK_AUDIO_STANDARD_MIXER,
 105
 106         QUIRK_TYPE_COUNT
 107 };
 108
 109 struct snd_usb_audio_quirk {
 110         const char *vendor_name;
 111         const char *product_name;
 112         int16_t ifnum;
 113         uint16_t type;
 114         const void *data;
 115 };
 116
 117 #define combine_word(s)    ((*(s)) | ((unsigned int)(s)[1] << 8))
 118 #define combine_triple(s)  (combine_word(s) | ((unsigned int)(s)[2] << 16))
 119 #define combine_quad(s)    (combine_triple(s) | ((unsigned int)(s)[3] << 24))
 120
 121 int snd_usb_lock_shutdown(struct snd_usb_audio *chip);
 122 void snd_usb_unlock_shutdown(struct snd_usb_audio *chip);
 123
 124 #endif /* __USBAUDIO_H */