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) (((unsigned int)(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 */
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 */
49 struct list_head clock_ref_list; /* list of clock 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 bool lowlatency; /* from the 'lowlatency' module param */
61 struct usb_host_interface *ctrl_intf; /* the audio control interface */
62 struct media_device *media_dev;
63 struct media_intf_devnode *ctl_intf_media_devnode;
66 #define USB_AUDIO_IFACE_UNUSED ((void *)-1L)
68 #define usb_audio_err(chip, fmt, args...) \
69 dev_err(&(chip)->dev->dev, fmt, ##args)
70 #define usb_audio_warn(chip, fmt, args...) \
71 dev_warn(&(chip)->dev->dev, fmt, ##args)
72 #define usb_audio_info(chip, fmt, args...) \
73 dev_info(&(chip)->dev->dev, fmt, ##args)
74 #define usb_audio_dbg(chip, fmt, args...) \
75 dev_dbg(&(chip)->dev->dev, fmt, ##args)
78 * Information about devices with broken descriptors
81 /* special values for .ifnum */
82 #define QUIRK_NODEV_INTERFACE -3 /* return -ENODEV */
83 #define QUIRK_NO_INTERFACE -2
84 #define QUIRK_ANY_INTERFACE -1
87 QUIRK_IGNORE_INTERFACE,
90 QUIRK_MIDI_STANDARD_INTERFACE,
91 QUIRK_MIDI_FIXED_ENDPOINT,
103 QUIRK_AUDIO_STANDARD_INTERFACE,
104 QUIRK_AUDIO_FIXED_ENDPOINT,
105 QUIRK_AUDIO_EDIROL_UAXX,
106 QUIRK_AUDIO_STANDARD_MIXER,
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
142 * QUIRK_FLAG_PLAYBACK_FIRST:
143 * Start playback stream at first even in implement feedback mode
144 * QUIRK_FLAG_SKIP_CLOCK_SELECTOR:
145 * Skip clock selector setup; the device may reset to invalid state
146 * QUIRK_FLAG_IGNORE_CLOCK_SOURCE:
147 * Ignore errors from clock source search; i.e. hardcoded clock
148 * QUIRK_FLAG_ITF_USB_DSD_DAC:
149 * Indicates the device is for ITF-USB DSD based DACs that need a vendor cmd
150 * to switch between PCM and native DSD mode
151 * QUIRK_FLAG_CTL_MSG_DELAY:
152 * Add a delay of 20ms at each control message handling
153 * QUIRK_FLAG_CTL_MSG_DELAY_1M:
154 * Add a delay of 1-2ms at each control message handling
155 * QUIRK_FLAG_CTL_MSG_DELAY_5M:
156 * Add a delay of 5-6ms at each control message handling
157 * QUIRK_FLAG_IFACE_DELAY:
158 * Add a delay of 50ms at each interface setup
159 * QUIRK_FLAG_VALIDATE_RATES:
160 * Perform sample rate validations at probe
161 * QUIRK_FLAG_DISABLE_AUTOSUSPEND:
162 * Disable runtime PM autosuspend
163 * QUIRK_FLAG_IGNORE_CTL_ERROR:
164 * Ignore errors for mixer access
165 * QUIRK_FLAG_DSD_RAW:
166 * Support generic DSD raw U32_BE format
167 * QUIRK_FLAG_SET_IFACE_FIRST:
168 * Set up the interface at first like UAC1
169 * QUIRK_FLAG_GENERIC_IMPLICIT_FB
170 * Apply the generic implicit feedback sync mode (same as implicit_fb=1 option)
171 * QUIRK_FLAG_SKIP_IMPLICIT_FB
172 * Don't apply implicit feedback sync mode
175 #define QUIRK_FLAG_GET_SAMPLE_RATE (1U << 0)
176 #define QUIRK_FLAG_SHARE_MEDIA_DEVICE (1U << 1)
177 #define QUIRK_FLAG_ALIGN_TRANSFER (1U << 2)
178 #define QUIRK_FLAG_TX_LENGTH (1U << 3)
179 #define QUIRK_FLAG_PLAYBACK_FIRST (1U << 4)
180 #define QUIRK_FLAG_SKIP_CLOCK_SELECTOR (1U << 5)
181 #define QUIRK_FLAG_IGNORE_CLOCK_SOURCE (1U << 6)
182 #define QUIRK_FLAG_ITF_USB_DSD_DAC (1U << 7)
183 #define QUIRK_FLAG_CTL_MSG_DELAY (1U << 8)
184 #define QUIRK_FLAG_CTL_MSG_DELAY_1M (1U << 9)
185 #define QUIRK_FLAG_CTL_MSG_DELAY_5M (1U << 10)
186 #define QUIRK_FLAG_IFACE_DELAY (1U << 11)
187 #define QUIRK_FLAG_VALIDATE_RATES (1U << 12)
188 #define QUIRK_FLAG_DISABLE_AUTOSUSPEND (1U << 13)
189 #define QUIRK_FLAG_IGNORE_CTL_ERROR (1U << 14)
190 #define QUIRK_FLAG_DSD_RAW (1U << 15)
191 #define QUIRK_FLAG_SET_IFACE_FIRST (1U << 16)
192 #define QUIRK_FLAG_GENERIC_IMPLICIT_FB (1U << 17)
193 #define QUIRK_FLAG_SKIP_IMPLICIT_FB (1U << 18)
195 #endif /* __USBAUDIO_H */