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 quirk_flags;
38 unsigned int need_delayed_register:1; /* warn for delayed registration */
39 unsigned int playback_first:1; /* for implicit fb: don't wait for the first capture URBs */
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 */
48 struct list_head iface_ref_list; /* list of interface refcounts */
51 struct list_head midi_list; /* list of midi interfaces */
53 struct list_head mixer_list; /* list of mixer interfaces */
55 int setup; /* from the 'device_setup' module param */
56 bool generic_implicit_fb; /* from the 'implicit_fb' module param */
57 bool autoclock; /* from the 'autoclock' module param */
59 struct usb_host_interface *ctrl_intf; /* the audio control interface */
60 struct media_device *media_dev;
61 struct media_intf_devnode *ctl_intf_media_devnode;
64 #define USB_AUDIO_IFACE_UNUSED ((void *)-1L)
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)
76 * Information about devices with broken descriptors
79 /* special values for .ifnum */
80 #define QUIRK_NODEV_INTERFACE -3 /* return -ENODEV */
81 #define QUIRK_NO_INTERFACE -2
82 #define QUIRK_ANY_INTERFACE -1
85 QUIRK_IGNORE_INTERFACE,
88 QUIRK_MIDI_STANDARD_INTERFACE,
89 QUIRK_MIDI_FIXED_ENDPOINT,
101 QUIRK_AUDIO_STANDARD_INTERFACE,
102 QUIRK_AUDIO_FIXED_ENDPOINT,
103 QUIRK_AUDIO_EDIROL_UAXX,
104 QUIRK_AUDIO_STANDARD_MIXER,
105 QUIRK_SETUP_FMT_AFTER_RESUME,
106 QUIRK_SETUP_DISABLE_AUTOSUSPEND,
111 struct snd_usb_audio_quirk {
112 const char *vendor_name;
113 const char *product_name;
119 #define combine_word(s) ((*(s)) | ((unsigned int)(s)[1] << 8))
120 #define combine_triple(s) (combine_word(s) | ((unsigned int)(s)[2] << 16))
121 #define combine_quad(s) (combine_triple(s) | ((unsigned int)(s)[3] << 24))
123 int snd_usb_lock_shutdown(struct snd_usb_audio *chip);
124 void snd_usb_unlock_shutdown(struct snd_usb_audio *chip);
126 extern bool snd_usb_use_vmalloc;
127 extern bool snd_usb_skip_validation;
130 * Driver behavior quirk flags, stored in chip->quirk_flags
132 * QUIRK_FLAG_GET_SAMPLE_RATE:
133 * Skip reading sample rate for devices, as some devices behave inconsistently
135 * QUIRK_FLAG_SHARE_MEDIA_DEVICE:
136 * Create Media Controller API entries
137 * QUIRK_FLAG_ALIGN_TRANSFER:
138 * Allow alignment on audio sub-slot (channel samples) rather than on audio
139 * slots (audio frames)
141 * Add length specifier to transfers
144 #define QUIRK_FLAG_GET_SAMPLE_RATE (1U << 0)
145 #define QUIRK_FLAG_SHARE_MEDIA_DEVICE (1U << 1)
146 #define QUIRK_FLAG_ALIGN_TRANSFER (1U << 2)
147 #define QUIRK_FLAG_TX_LENGTH (1U << 3)
149 #endif /* __USBAUDIO_H */