root/sound/usb/usbaudio.h

INCLUDED FROM

   1 /* SPDX-License-Identifier: GPL-2.0-or-later */
   2 #ifndef __USBAUDIO_H
   3 #define __USBAUDIO_H
   4 /*
   5  *   (Tentative) USB Audio Driver for ALSA
   6  *
   7  *   Copyright (c) 2002 by Takashi Iwai <tiwai@suse.de>
   8  */
   9 
  10 /* handling of USB vendor/product ID pairs as 32-bit numbers */
  11 #define USB_ID(vendor, product) (((vendor) << 16) | (product))
  12 #define USB_ID_VENDOR(id) ((id) >> 16)
  13 #define USB_ID_PRODUCT(id) ((u16)(id))
  14 
  15 /*
  16  *
  17  */
  18 
  19 struct media_device;
  20 struct media_intf_devnode;
  21 
  22 struct snd_usb_audio {
  23         int index;
  24         struct usb_device *dev;
  25         struct snd_card *card;
  26         struct usb_interface *pm_intf;
  27         u32 usb_id;
  28         struct mutex mutex;
  29         unsigned int system_suspend;
  30         atomic_t active;
  31         atomic_t shutdown;
  32         atomic_t usage_count;
  33         wait_queue_head_t shutdown_wait;
  34         unsigned int txfr_quirk:1; /* Subframe boundaries on transfers */
  35         unsigned int tx_length_quirk:1; /* Put length specifier in transfers */
  36         unsigned int setup_fmt_after_resume_quirk:1; /* setup the format to interface after resume */
  37         int num_interfaces;
  38         int num_suspended_intf;
  39         int sample_rate_read_error;
  40 
  41         int badd_profile;               /* UAC3 BADD profile */
  42 
  43         struct list_head pcm_list;      /* list of pcm streams */
  44         struct list_head ep_list;       /* list of audio-related endpoints */
  45         int pcm_devs;
  46 
  47         struct list_head midi_list;     /* list of midi interfaces */
  48 
  49         struct list_head mixer_list;    /* list of mixer interfaces */
  50 
  51         int setup;                      /* from the 'device_setup' module param */
  52         bool autoclock;                 /* from the 'autoclock' module param */
  53         bool keep_iface;                /* keep interface/altset after closing
  54                                          * or parameter change
  55                                          */
  56 
  57         struct usb_host_interface *ctrl_intf;   /* the audio control interface */
  58         struct media_device *media_dev;
  59         struct media_intf_devnode *ctl_intf_media_devnode;
  60 };
  61 
  62 #define usb_audio_err(chip, fmt, args...) \
  63         dev_err(&(chip)->dev->dev, fmt, ##args)
  64 #define usb_audio_warn(chip, fmt, args...) \
  65         dev_warn(&(chip)->dev->dev, fmt, ##args)
  66 #define usb_audio_info(chip, fmt, args...) \
  67         dev_info(&(chip)->dev->dev, fmt, ##args)
  68 #define usb_audio_dbg(chip, fmt, args...) \
  69         dev_dbg(&(chip)->dev->dev, fmt, ##args)
  70 
  71 /*
  72  * Information about devices with broken descriptors
  73  */
  74 
  75 /* special values for .ifnum */
  76 #define QUIRK_NO_INTERFACE              -2
  77 #define QUIRK_ANY_INTERFACE             -1
  78 
  79 enum quirk_type {
  80         QUIRK_IGNORE_INTERFACE,
  81         QUIRK_COMPOSITE,
  82         QUIRK_AUTODETECT,
  83         QUIRK_MIDI_STANDARD_INTERFACE,
  84         QUIRK_MIDI_FIXED_ENDPOINT,
  85         QUIRK_MIDI_YAMAHA,
  86         QUIRK_MIDI_ROLAND,
  87         QUIRK_MIDI_MIDIMAN,
  88         QUIRK_MIDI_NOVATION,
  89         QUIRK_MIDI_RAW_BYTES,
  90         QUIRK_MIDI_EMAGIC,
  91         QUIRK_MIDI_CME,
  92         QUIRK_MIDI_AKAI,
  93         QUIRK_MIDI_US122L,
  94         QUIRK_MIDI_FTDI,
  95         QUIRK_MIDI_CH345,
  96         QUIRK_AUDIO_STANDARD_INTERFACE,
  97         QUIRK_AUDIO_FIXED_ENDPOINT,
  98         QUIRK_AUDIO_EDIROL_UAXX,
  99         QUIRK_AUDIO_ALIGN_TRANSFER,
 100         QUIRK_AUDIO_STANDARD_MIXER,
 101         QUIRK_SETUP_FMT_AFTER_RESUME,
 102 
 103         QUIRK_TYPE_COUNT
 104 };
 105 
 106 struct snd_usb_audio_quirk {
 107         const char *vendor_name;
 108         const char *product_name;
 109         const char *profile_name;       /* override the card->longname */
 110         int16_t ifnum;
 111         uint16_t type;
 112         bool shares_media_device;
 113         const void *data;
 114 };
 115 
 116 #define combine_word(s)    ((*(s)) | ((unsigned int)(s)[1] << 8))
 117 #define combine_triple(s)  (combine_word(s) | ((unsigned int)(s)[2] << 16))
 118 #define combine_quad(s)    (combine_triple(s) | ((unsigned int)(s)[3] << 24))
 119 
 120 int snd_usb_lock_shutdown(struct snd_usb_audio *chip);
 121 void snd_usb_unlock_shutdown(struct snd_usb_audio *chip);
 122 
 123 extern bool snd_usb_use_vmalloc;
 124 
 125 #endif /* __USBAUDIO_H */