/* SPDX-License-Identifier: GPL-2.0-or-later */ #ifndef __USBAUDIO_H #define __USBAUDIO_H /* * (Tentative) USB Audio Driver for ALSA * * Copyright (c) 2002 by Takashi Iwai <tiwai@suse.de>
*/
/* handling of USB vendor/product ID pairs as 32-bit numbers */ #define USB_ID(vendor, product) (((unsignedint)(vendor) << 16) | (product)) #define USB_ID_VENDOR(id) ((id) >> 16) #define USB_ID_PRODUCT(id) ((u16)(id))
/* *
*/
struct media_device; struct media_intf_devnode;
#define MAX_CARD_INTERFACES 16
/* * Structure holding assosiation between Audio Control Interface * and given Streaming or Midi Interface.
*/ struct snd_intf_to_ctrl {
u8 interface; struct usb_host_interface *ctrl_intf;
};
struct snd_usb_audio { int index; struct usb_device *dev; struct snd_card *card; struct usb_interface *intf[MAX_CARD_INTERFACES];
u32 usb_id;
uint16_t quirk_type; struct mutex mutex; unsignedint system_suspend;
atomic_t active;
atomic_t shutdown;
atomic_t usage_count;
wait_queue_head_t shutdown_wait; unsignedint quirk_flags; unsignedint need_delayed_register:1; /* warn for delayed registration */ int num_interfaces; int last_iface; int num_suspended_intf; int sample_rate_read_error;
int badd_profile; /* UAC3 BADD profile */
struct list_head pcm_list; /* list of pcm streams */ struct list_head ep_list; /* list of audio-related endpoints */ struct list_head iface_ref_list; /* list of interface refcounts */ struct list_head clock_ref_list; /* list of clock refcounts */ int pcm_devs;
unsignedint num_rawmidis; /* number of created rawmidi devices */ struct list_head midi_list; /* list of midi interfaces */ struct list_head midi_v2_list; /* list of MIDI 2 interfaces */
struct list_head mixer_list; /* list of mixer interfaces */
int setup; /* from the 'device_setup' module param */ bool generic_implicit_fb; /* from the 'implicit_fb' module param */ bool autoclock; /* from the 'autoclock' module param */
bool lowlatency; /* from the 'lowlatency' module param */ struct usb_host_interface *ctrl_intf; /* the audio control interface */ struct media_device *media_dev; struct media_intf_devnode *ctl_intf_media_devnode;
/* * Driver behavior quirk flags, stored in chip->quirk_flags * * QUIRK_FLAG_GET_SAMPLE_RATE: * Skip reading sample rate for devices, as some devices behave inconsistently * or return error * QUIRK_FLAG_SHARE_MEDIA_DEVICE: * Create Media Controller API entries * QUIRK_FLAG_ALIGN_TRANSFER: * Allow alignment on audio sub-slot (channel samples) rather than on audio * slots (audio frames) * QUIRK_TX_LENGTH: * Add length specifier to transfers * QUIRK_FLAG_PLAYBACK_FIRST: * Start playback stream at first even in implement feedback mode * QUIRK_FLAG_SKIP_CLOCK_SELECTOR: * Skip clock selector setup; the device may reset to invalid state * QUIRK_FLAG_IGNORE_CLOCK_SOURCE: * Ignore errors from clock source search; i.e. hardcoded clock * QUIRK_FLAG_ITF_USB_DSD_DAC: * Indicates the device is for ITF-USB DSD based DACs that need a vendor cmd * to switch between PCM and native DSD mode * QUIRK_FLAG_CTL_MSG_DELAY: * Add a delay of 20ms at each control message handling * QUIRK_FLAG_CTL_MSG_DELAY_1M: * Add a delay of 1-2ms at each control message handling * QUIRK_FLAG_CTL_MSG_DELAY_5M: * Add a delay of 5-6ms at each control message handling * QUIRK_FLAG_IFACE_DELAY: * Add a delay of 50ms at each interface setup * QUIRK_FLAG_VALIDATE_RATES: * Perform sample rate validations at probe * QUIRK_FLAG_DISABLE_AUTOSUSPEND: * Disable runtime PM autosuspend * QUIRK_FLAG_IGNORE_CTL_ERROR: * Ignore errors for mixer access * QUIRK_FLAG_DSD_RAW: * Support generic DSD raw U32_BE format * QUIRK_FLAG_SET_IFACE_FIRST: * Set up the interface at first like UAC1 * QUIRK_FLAG_GENERIC_IMPLICIT_FB * Apply the generic implicit feedback sync mode (same as implicit_fb=1 option) * QUIRK_FLAG_SKIP_IMPLICIT_FB * Don't apply implicit feedback sync mode * QUIRK_FLAG_IFACE_SKIP_CLOSE * Don't closed interface during setting sample rate * QUIRK_FLAG_FORCE_IFACE_RESET * Force an interface reset whenever stopping & restarting a stream * (e.g. after xrun) * QUIRK_FLAG_FIXED_RATE * Do not set PCM rate (frequency) when only one rate is available * for the given endpoint. * QUIRK_FLAG_MIC_RES_16 and QUIRK_FLAG_MIC_RES_384 * Set the fixed resolution for Mic Capture Volume (mostly for webcams) * QUIRK_FLAG_MIXER_MIN_MUTE * Set minimum volume control value as mute for devices where the lowest * playback value represents muted state instead of minimum audible volume
*/
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