1 /* SPDX-License-Identifier: GPL-2.0-or-later */
5 * (Tentative) USB Audio Driver for ALSA
7 * Copyright (c) 2002 by Takashi Iwai <tiwai@suse.de>
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))
20 struct media_intf_devnode;
22 #define MAX_CARD_INTERFACES 16
24 struct snd_usb_audio {
26 struct usb_device *dev;
27 struct snd_card *card;
28 struct usb_interface *intf[MAX_CARD_INTERFACES];
32 unsigned int system_suspend;
36 wait_queue_head_t shutdown_wait;
37 unsigned int txfr_quirk:1; /* Subframe boundaries on transfers */
38 unsigned int tx_length_quirk:1; /* Put length specifier in transfers */
39 unsigned int need_delayed_register:1; /* warn for delayed registration */
40 unsigned int playback_first:1; /* for implicit fb: don't wait for the first capture URBs */
42 int num_suspended_intf;
43 int sample_rate_read_error;
45 int badd_profile; /* UAC3 BADD profile */
47 struct list_head pcm_list; /* list of pcm streams */
48 struct list_head ep_list; /* list of audio-related endpoints */
49 struct list_head iface_ref_list; /* list of interface refcounts */
52 struct list_head midi_list; /* list of midi interfaces */
54 struct list_head mixer_list; /* list of mixer interfaces */
56 int setup; /* from the 'device_setup' module param */
57 bool generic_implicit_fb; /* from the 'implicit_fb' module param */
58 bool autoclock; /* from the 'autoclock' module param */
60 struct usb_host_interface *ctrl_intf; /* the audio control interface */
61 struct media_device *media_dev;
62 struct media_intf_devnode *ctl_intf_media_devnode;
65 #define USB_AUDIO_IFACE_UNUSED ((void *)-1L)
67 #define usb_audio_err(chip, fmt, args...) \
68 dev_err(&(chip)->dev->dev, fmt, ##args)
69 #define usb_audio_warn(chip, fmt, args...) \
70 dev_warn(&(chip)->dev->dev, fmt, ##args)
71 #define usb_audio_info(chip, fmt, args...) \
72 dev_info(&(chip)->dev->dev, fmt, ##args)
73 #define usb_audio_dbg(chip, fmt, args...) \
74 dev_dbg(&(chip)->dev->dev, fmt, ##args)
77 * Information about devices with broken descriptors
80 /* special values for .ifnum */
81 #define QUIRK_NODEV_INTERFACE -3 /* return -ENODEV */
82 #define QUIRK_NO_INTERFACE -2
83 #define QUIRK_ANY_INTERFACE -1
86 QUIRK_IGNORE_INTERFACE,
89 QUIRK_MIDI_STANDARD_INTERFACE,
90 QUIRK_MIDI_FIXED_ENDPOINT,
102 QUIRK_AUDIO_STANDARD_INTERFACE,
103 QUIRK_AUDIO_FIXED_ENDPOINT,
104 QUIRK_AUDIO_EDIROL_UAXX,
105 QUIRK_AUDIO_ALIGN_TRANSFER,
106 QUIRK_AUDIO_STANDARD_MIXER,
107 QUIRK_SETUP_FMT_AFTER_RESUME,
108 QUIRK_SETUP_DISABLE_AUTOSUSPEND,
113 struct snd_usb_audio_quirk {
114 const char *vendor_name;
115 const char *product_name;
118 bool shares_media_device;
122 #define combine_word(s) ((*(s)) | ((unsigned int)(s)[1] << 8))
123 #define combine_triple(s) (combine_word(s) | ((unsigned int)(s)[2] << 16))
124 #define combine_quad(s) (combine_triple(s) | ((unsigned int)(s)[3] << 24))
126 int snd_usb_lock_shutdown(struct snd_usb_audio *chip);
127 void snd_usb_unlock_shutdown(struct snd_usb_audio *chip);
129 extern bool snd_usb_use_vmalloc;
130 extern bool snd_usb_skip_validation;
132 #endif /* __USBAUDIO_H */