1 /* SPDX-License-Identifier: GPL-2.0-or-later */
5 * (Tentative) USB Audio Driver for ALSA
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];
31 unsigned int system_suspend;
35 wait_queue_head_t shutdown_wait;
36 unsigned int txfr_quirk:1; /* Subframe boundaries on transfers */
37 unsigned int tx_length_quirk:1; /* Put length specifier in transfers */
38 unsigned int setup_fmt_after_resume_quirk:1; /* setup the format to interface after resume */
39 unsigned int need_delayed_register:1; /* warn for delayed registration */
41 int num_suspended_intf;
42 int sample_rate_read_error;
44 int badd_profile; /* UAC3 BADD profile */
46 struct list_head pcm_list; /* list of pcm streams */
47 struct list_head ep_list; /* list of audio-related endpoints */
50 struct list_head midi_list; /* list of midi interfaces */
52 struct list_head mixer_list; /* list of mixer interfaces */
54 int setup; /* from the 'device_setup' module param */
55 bool autoclock; /* from the 'autoclock' module param */
56 bool keep_iface; /* keep interface/altset after closing
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_err(chip, fmt, args...) \
66 dev_err(&(chip)->dev->dev, fmt, ##args)
67 #define usb_audio_warn(chip, fmt, args...) \
68 dev_warn(&(chip)->dev->dev, fmt, ##args)
69 #define usb_audio_info(chip, fmt, args...) \
70 dev_info(&(chip)->dev->dev, fmt, ##args)
71 #define usb_audio_dbg(chip, fmt, args...) \
72 dev_dbg(&(chip)->dev->dev, fmt, ##args)
75 * Information about devices with broken descriptors
78 /* special values for .ifnum */
79 #define QUIRK_NO_INTERFACE -2
80 #define QUIRK_ANY_INTERFACE -1
83 QUIRK_IGNORE_INTERFACE,
86 QUIRK_MIDI_STANDARD_INTERFACE,
87 QUIRK_MIDI_FIXED_ENDPOINT,
99 QUIRK_AUDIO_STANDARD_INTERFACE,
100 QUIRK_AUDIO_FIXED_ENDPOINT,
101 QUIRK_AUDIO_EDIROL_UAXX,
102 QUIRK_AUDIO_ALIGN_TRANSFER,
103 QUIRK_AUDIO_STANDARD_MIXER,
104 QUIRK_SETUP_FMT_AFTER_RESUME,
105 QUIRK_SETUP_DISABLE_AUTOSUSPEND,
110 struct snd_usb_audio_quirk {
111 const char *vendor_name;
112 const char *product_name;
113 const char *profile_name; /* override the card->longname */
116 bool shares_media_device;
120 #define combine_word(s) ((*(s)) | ((unsigned int)(s)[1] << 8))
121 #define combine_triple(s) (combine_word(s) | ((unsigned int)(s)[2] << 16))
122 #define combine_quad(s) (combine_triple(s) | ((unsigned int)(s)[3] << 24))
124 int snd_usb_lock_shutdown(struct snd_usb_audio *chip);
125 void snd_usb_unlock_shutdown(struct snd_usb_audio *chip);
127 extern bool snd_usb_use_vmalloc;
128 extern bool snd_usb_skip_validation;
130 #endif /* __USBAUDIO_H */