ALSA: usb: initial USB Audio Device Class 3.0 support

Recently released USB Audio Class 3.0 specification
introduces many significant changes comparing to
previous versions, like
 - new Power Domains, support for LPM/L1
 - new Cluster descriptor
 - changed layout of all class-specific descriptors
 - new High Capability descriptors
 - New class-specific String descriptors
 - new and removed units
 - additional sources for interrupts
 - removed Type II Audio Data Formats
 - ... and many other things (check spec)

It also provides backward compatibility through
multiple configurations, as well as requires
mandatory support for BADD (Basic Audio Device
Definition) on each ADC3.0 compliant device

This patch adds initial support of UAC3 specification
that is enough for Generic I/O Profile (BAOF, BAIF)
device support from BADD document.

Signed-off-by: Ruslan Bilovol <ruslan.bilovol@gmail.com>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

2 files changed, 397 insertions, 2 deletions

diff --git a/include/linux/usb/audio-v2.h b/include/linux/usb/audio-v2.h
index 3119d0ace7aa..2db83a191e78 100644
--- a/include/linux/usb/audio-v2.h
+++ b/include/linux/usb/audio-v2.h
@@ -34,12 +34,12 @@
  *
  */
 
-static inline bool uac2_control_is_readable(u32 bmControls, u8 control)
+static inline bool uac_v2v3_control_is_readable(u32 bmControls, u8 control)
 {
 	return (bmControls >> (control * 2)) & 0x1;
 }
 
-static inline bool uac2_control_is_writeable(u32 bmControls, u8 control)
+static inline bool uac_v2v3_control_is_writeable(u32 bmControls, u8 control)
 {
 	return (bmControls >> (control * 2)) & 0x2;
 }
diff --git a/include/linux/usb/audio-v3.h b/include/linux/usb/audio-v3.h
new file mode 100644
index 000000000000..a8959aaba0ae
--- /dev/null
+++ b/include/linux/usb/audio-v3.h
@@ -0,0 +1,395 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (c) 2017 Ruslan Bilovol <ruslan.bilovol@gmail.com>
+ *
+ * This file holds USB constants and structures defined
+ * by the USB DEVICE CLASS DEFINITION FOR AUDIO DEVICES Release 3.0.
+ */
+
+#ifndef __LINUX_USB_AUDIO_V3_H
+#define __LINUX_USB_AUDIO_V3_H
+
+#include <linux/types.h>
+
+/*
+ * v1.0, v2.0 and v3.0 of this standard have many things in common. For the rest
+ * of the definitions, please refer to audio.h and audio-v2.h
+ */
+
+/* All High Capability descriptors have these 2 fields at the beginning */
+struct uac3_hc_descriptor_header {
+	__le16 wLength;
+	__u8 bDescriptorType;
+	__u8 bDescriptorSubtype;
+	__le16 wDescriptorID;
+} __attribute__ ((packed));
+
+/* 4.3.1 CLUSTER DESCRIPTOR HEADER */
+struct uac3_cluster_header_descriptor {
+	__le16 wLength;
+	__u8 bDescriptorType;
+	__u8 bDescriptorSubtype;
+	__le16 wDescriptorID;
+	__u8 bNrChannels;
+} __attribute__ ((packed));
+
+/* 4.3.2.1 SEGMENTS */
+struct uac3_cluster_segment_descriptor {
+	__le16 wLength;
+	__u8 bSegmentType;
+	/* __u8[0]; segment-specific data */
+} __attribute__ ((packed));
+
+/* 4.3.2.1.1 END SEGMENT */
+struct uac3_cluster_end_segment_descriptor {
+	__le16 wLength;
+	__u8 bSegmentType;		/* Constant END_SEGMENT */
+} __attribute__ ((packed));
+
+/* 4.3.2.1.3.1 INFORMATION SEGMENT */
+struct uac3_cluster_information_segment_descriptor {
+	__le16 wLength;
+	__u8 bSegmentType;
+	__u8 bChPurpose;
+	__u8 bChRelationship;
+	__u8 bChGroupID;
+} __attribute__ ((packed));
+
+/* 4.5.2 CLASS-SPECIFIC AC INTERFACE DESCRIPTOR */
+struct uac3_ac_header_descriptor {
+	__u8 bLength;			/* 10 */
+	__u8 bDescriptorType;		/* CS_INTERFACE descriptor type */
+	__u8 bDescriptorSubtype;	/* HEADER descriptor subtype */
+	__u8 bCategory;
+
+	/* includes Clock Source, Unit, Terminal, and Power Domain desc. */
+	__le16 wTotalLength;
+
+	__le32 bmControls;
+} __attribute__ ((packed));
+
+/* 4.5.2.1 INPUT TERMINAL DESCRIPTOR */
+struct uac3_input_terminal_descriptor {
+	__u8 bLength;
+	__u8 bDescriptorType;
+	__u8 bDescriptorSubtype;
+	__u8 bTerminalID;
+	__le16 wTerminalType;
+	__u8 bAssocTerminal;
+	__u8 bCSourceID;
+	__le32 bmControls;
+	__le16 wClusterDescrID;
+	__le16 wExTerminalDescrID;
+	__le16 wConnectorsDescrID;
+	__le16 wTerminalDescrStr;
+} __attribute__((packed));
+
+/* 4.5.2.2 OUTPUT TERMINAL DESCRIPTOR */
+struct uac3_output_terminal_descriptor {
+	__u8 bLength;
+	__u8 bDescriptorType;
+	__u8 bDescriptorSubtype;
+	__u8 bTerminalID;
+	__le16 wTerminalType;
+	__u8 bAssocTerminal;
+	__u8 bSourceID;
+	__u8 bCSourceID;
+	__le32 bmControls;
+	__le16 wExTerminalDescrID;
+	__le16 wConnectorsDescrID;
+	__le16 wTerminalDescrStr;
+} __attribute__((packed));
+
+/* 4.5.2.7 FEATURE UNIT DESCRIPTOR */
+struct uac3_feature_unit_descriptor {
+	__u8 bLength;
+	__u8 bDescriptorType;
+	__u8 bDescriptorSubtype;
+	__u8 bUnitID;
+	__u8 bSourceID;
+	/* bmaControls is actually u32,
+	 * but u8 is needed for the hybrid parser */
+	__u8 bmaControls[0]; /* variable length */
+	/* wFeatureDescrStr omitted */
+} __attribute__((packed));
+
+#define UAC3_DT_FEATURE_UNIT_SIZE(ch)		(7 + ((ch) + 1) * 4)
+
+/* As above, but more useful for defining your own descriptors */
+#define DECLARE_UAC3_FEATURE_UNIT_DESCRIPTOR(ch)		\
+struct uac3_feature_unit_descriptor_##ch {			\
+	__u8 bLength;						\
+	__u8 bDescriptorType;					\
+	__u8 bDescriptorSubtype;				\
+	__u8 bUnitID;						\
+	__u8 bSourceID;						\
+	__le32 bmaControls[ch + 1];				\
+	__le16 wFeatureDescrStr;				\
+} __attribute__ ((packed))
+
+/* 4.5.2.12 CLOCK SOURCE DESCRIPTOR */
+struct uac3_clock_source_descriptor {
+	__u8 bLength;
+	__u8 bDescriptorType;
+	__u8 bDescriptorSubtype;
+	__u8 bClockID;
+	__u8 bmAttributes;
+	__le32 bmControls;
+	__u8 bReferenceTerminal;
+	__le16 wClockSourceStr;
+} __attribute__((packed));
+
+/* bmAttribute fields */
+#define UAC3_CLOCK_SOURCE_TYPE_EXT	0x0
+#define UAC3_CLOCK_SOURCE_TYPE_INT	0x1
+#define UAC3_CLOCK_SOURCE_ASYNC		(0 << 2)
+#define UAC3_CLOCK_SOURCE_SYNCED_TO_SOF	(1 << 1)
+
+/* 4.5.2.13 CLOCK SELECTOR DESCRIPTOR */
+struct uac3_clock_selector_descriptor {
+	__u8 bLength;
+	__u8 bDescriptorType;
+	__u8 bDescriptorSubtype;
+	__u8 bClockID;
+	__u8 bNrInPins;
+	__u8 baCSourceID[];
+	/* bmControls and wCSelectorDescrStr omitted */
+} __attribute__((packed));
+
+/* 4.5.2.14 CLOCK MULTIPLIER DESCRIPTOR */
+struct uac3_clock_multiplier_descriptor {
+	__u8 bLength;
+	__u8 bDescriptorType;
+	__u8 bDescriptorSubtype;
+	__u8 bClockID;
+	__u8 bCSourceID;
+	__le32 bmControls;
+	__le16 wCMultiplierDescrStr;
+} __attribute__((packed));
+
+/* 4.5.2.15 POWER DOMAIN DESCRIPTOR */
+struct uac3_power_domain_descriptor {
+	__u8 bLength;
+	__u8 bDescriptorType;
+	__u8 bDescriptorSubtype;
+	__u8 bPowerDomainID;
+	__le16 waRecoveryTime1;
+	__le16 waRecoveryTime2;
+	__u8 bNrEntities;
+	__u8 baEntityID[];
+	/* wPDomainDescrStr omitted */
+} __attribute__((packed));
+
+/* As above, but more useful for defining your own descriptors */
+#define DECLARE_UAC3_POWER_DOMAIN_DESCRIPTOR(n)			\
+struct uac3_power_domain_descriptor_##n {			\
+	__u8 bLength;						\
+	__u8 bDescriptorType;					\
+	__u8 bDescriptorSubtype;				\
+	__u8 bPowerDomainID;					\
+	__le16 waRecoveryTime1;					\
+	__le16 waRecoveryTime2;					\
+	__u8 bNrEntities;					\
+	__u8 baEntityID[n];					\
+	__le16 wPDomainDescrStr;					\
+} __attribute__ ((packed))
+
+/* 4.7.2 CLASS-SPECIFIC AS INTERFACE DESCRIPTOR */
+struct uac3_as_header_descriptor {
+	__u8 bLength;
+	__u8 bDescriptorType;
+	__u8 bDescriptorSubtype;
+	__u8 bTerminalLink;
+	__le32 bmControls;
+	__le16 wClusterDescrID;
+	__le64 bmFormats;
+	__u8 bSubslotSize;
+	__u8 bBitResolution;
+	__le16 bmAuxProtocols;
+	__u8 bControlSize;
+} __attribute__((packed));
+
+#define UAC3_FORMAT_TYPE_I_RAW_DATA	(1 << 6)
+
+/* 4.8.1.2 CLASS-SPECIFIC AS ISOCHRONOUS AUDIO DATA ENDPOINT DESCRIPTOR */
+struct uac3_iso_endpoint_descriptor {
+	__u8 bLength;
+	__u8 bDescriptorType;
+	__u8 bDescriptorSubtype;
+	__le32 bmControls;
+	__u8 bLockDelayUnits;
+	__le16 wLockDelay;
+} __attribute__((packed));
+
+/* 6.1 INTERRUPT DATA MESSAGE */
+struct uac3_interrupt_data_msg {
+	__u8 bInfo;
+	__u8 bSourceType;
+	__le16 wValue;
+	__le16 wIndex;
+} __attribute__((packed));
+
+/* A.2 AUDIO AUDIO FUNCTION SUBCLASS CODES */
+#define UAC3_FUNCTION_SUBCLASS_UNDEFINED	0x00
+#define UAC3_FUNCTION_SUBCLASS_FULL_ADC_3_0	0x01
+/* BADD profiles */
+#define UAC3_FUNCTION_SUBCLASS_GENERIC_IO	0x20
+#define UAC3_FUNCTION_SUBCLASS_HEADPHONE	0x21
+#define UAC3_FUNCTION_SUBCLASS_SPEAKER		0x22
+#define UAC3_FUNCTION_SUBCLASS_MICROPHONE	0x23
+#define UAC3_FUNCTION_SUBCLASS_HEADSET		0x24
+#define UAC3_FUNCTION_SUBCLASS_HEADSET_ADAPTER	0x25
+#define UAC3_FUNCTION_SUBCLASS_SPEAKERPHONE	0x26
+
+/* A.7 AUDIO FUNCTION CATEGORY CODES */
+#define UAC3_FUNCTION_SUBCLASS_UNDEFINED	0x00
+#define UAC3_FUNCTION_DESKTOP_SPEAKER		0x01
+#define UAC3_FUNCTION_HOME_THEATER		0x02
+#define UAC3_FUNCTION_MICROPHONE		0x03
+#define UAC3_FUNCTION_HEADSET			0x04
+#define UAC3_FUNCTION_TELEPHONE			0x05
+#define UAC3_FUNCTION_CONVERTER			0x06
+#define UAC3_FUNCTION_SOUND_RECORDER		0x07
+#define UAC3_FUNCTION_IO_BOX			0x08
+#define UAC3_FUNCTION_MUSICAL_INSTRUMENT	0x09
+#define UAC3_FUNCTION_PRO_AUDIO			0x0a
+#define UAC3_FUNCTION_AUDIO_VIDEO		0x0b
+#define UAC3_FUNCTION_CONTROL_PANEL		0x0c
+#define UAC3_FUNCTION_HEADPHONE			0x0d
+#define UAC3_FUNCTION_GENERIC_SPEAKER		0x0e
+#define UAC3_FUNCTION_HEADSET_ADAPTER		0x0f
+#define UAC3_FUNCTION_SPEAKERPHONE		0x10
+#define UAC3_FUNCTION_OTHER			0xff
+
+/* A.8 AUDIO CLASS-SPECIFIC DESCRIPTOR TYPES */
+#define UAC3_CS_UNDEFINED		0x20
+#define UAC3_CS_DEVICE			0x21
+#define UAC3_CS_CONFIGURATION		0x22
+#define UAC3_CS_STRING			0x23
+#define UAC3_CS_INTERFACE		0x24
+#define UAC3_CS_ENDPOINT		0x25
+#define UAC3_CS_CLUSTER			0x26
+
+/* A.10 CLUSTER DESCRIPTOR SEGMENT TYPES */
+#define UAC3_SEGMENT_UNDEFINED		0x00
+#define UAC3_CLUSTER_DESCRIPTION	0x01
+#define UAC3_CLUSTER_VENDOR_DEFINED	0x1F
+#define UAC3_CHANNEL_INFORMATION	0x20
+#define UAC3_CHANNEL_AMBISONIC		0x21
+#define UAC3_CHANNEL_DESCRIPTION	0x22
+#define UAC3_CHANNEL_VENDOR_DEFINED	0xFE
+#define UAC3_END_SEGMENT		0xFF
+
+/* A.11 CHANNEL PURPOSE DEFINITIONS */
+#define UAC3_PURPOSE_UNDEFINED		0x00
+#define UAC3_PURPOSE_GENERIC_AUDIO	0x01
+#define UAC3_PURPOSE_VOICE		0x02
+#define UAC3_PURPOSE_SPEECH		0x03
+#define UAC3_PURPOSE_AMBIENT		0x04
+#define UAC3_PURPOSE_REFERENCE		0x05
+#define UAC3_PURPOSE_ULTRASONIC		0x06
+#define UAC3_PURPOSE_VIBROKINETIC	0x07
+#define UAC3_PURPOSE_NON_AUDIO		0xFF
+
+/* A.12 CHANNEL RELATIONSHIP DEFINITIONS */
+#define UAC3_CH_RELATIONSHIP_UNDEFINED	0x00
+#define UAC3_CH_MONO			0x01
+#define UAC3_CH_LEFT			0x02
+#define UAC3_CH_RIGHT			0x03
+#define UAC3_CH_ARRAY			0x04
+#define UAC3_CH_PATTERN_X		0x20
+#define UAC3_CH_PATTERN_Y		0x21
+#define UAC3_CH_PATTERN_A		0x22
+#define UAC3_CH_PATTERN_B		0x23
+#define UAC3_CH_PATTERN_M		0x24
+#define UAC3_CH_PATTERN_S		0x25
+#define UAC3_CH_FRONT_LEFT		0x80
+#define UAC3_CH_FRONT_RIGHT		0x81
+#define UAC3_CH_FRONT_CENTER		0x82
+#define UAC3_CH_FRONT_LEFT_OF_CENTER	0x83
+#define UAC3_CH_FRONT_RIGHT_OF_CENTER	0x84
+#define UAC3_CH_FRONT_WIDE_LEFT		0x85
+#define UAC3_CH_FRONT_WIDE_RIGHT	0x86
+#define UAC3_CH_SIDE_LEFT		0x87
+#define UAC3_CH_SIDE_RIGHT		0x88
+#define UAC3_CH_SURROUND_ARRAY_LEFT	0x89
+#define UAC3_CH_SURROUND_ARRAY_RIGHT	0x8A
+#define UAC3_CH_BACK_LEFT		0x8B
+#define UAC3_CH_BACK_RIGHT		0x8C
+#define UAC3_CH_BACK_CENTER		0x8D
+#define UAC3_CH_BACK_LEFT_OF_CENTER	0x8E
+#define UAC3_CH_BACK_RIGHT_OF_CENTER	0x8F
+#define UAC3_CH_BACK_WIDE_LEFT		0x90
+#define UAC3_CH_BACK_WIDE_RIGHT		0x91
+#define UAC3_CH_TOP_CENTER		0x92
+#define UAC3_CH_TOP_FRONT_LEFT		0x93
+#define UAC3_CH_TOP_FRONT_RIGHT		0x94
+#define UAC3_CH_TOP_FRONT_CENTER	0x95
+#define UAC3_CH_TOP_FRONT_LOC		0x96
+#define UAC3_CH_TOP_FRONT_ROC		0x97
+#define UAC3_CH_TOP_FRONT_WIDE_LEFT	0x98
+#define UAC3_CH_TOP_FRONT_WIDE_RIGHT	0x99
+#define UAC3_CH_TOP_SIDE_LEFT		0x9A
+#define UAC3_CH_TOP_SIDE_RIGHT		0x9B
+#define UAC3_CH_TOP_SURR_ARRAY_LEFT	0x9C
+#define UAC3_CH_TOP_SURR_ARRAY_RIGHT	0x9D
+#define UAC3_CH_TOP_BACK_LEFT		0x9E
+#define UAC3_CH_TOP_BACK_RIGHT		0x9F
+#define UAC3_CH_TOP_BACK_CENTER		0xA0
+#define UAC3_CH_TOP_BACK_LOC		0xA1
+#define UAC3_CH_TOP_BACK_ROC		0xA2
+#define UAC3_CH_TOP_BACK_WIDE_LEFT	0xA3
+#define UAC3_CH_TOP_BACK_WIDE_RIGHT	0xA4
+#define UAC3_CH_BOTTOM_CENTER		0xA5
+#define UAC3_CH_BOTTOM_FRONT_LEFT	0xA6
+#define UAC3_CH_BOTTOM_FRONT_RIGHT	0xA7
+#define UAC3_CH_BOTTOM_FRONT_CENTER	0xA8
+#define UAC3_CH_BOTTOM_FRONT_LOC	0xA9
+#define UAC3_CH_BOTTOM_FRONT_ROC	0xAA
+#define UAC3_CH_BOTTOM_FRONT_WIDE_LEFT	0xAB
+#define UAC3_CH_BOTTOM_FRONT_WIDE_RIGHT	0xAC
+#define UAC3_CH_BOTTOM_SIDE_LEFT	0xAD
+#define UAC3_CH_BOTTOM_SIDE_RIGHT	0xAE
+#define UAC3_CH_BOTTOM_SURR_ARRAY_LEFT	0xAF
+#define UAC3_CH_BOTTOM_SURR_ARRAY_RIGHT	0xB0
+#define UAC3_CH_BOTTOM_BACK_LEFT	0xB1
+#define UAC3_CH_BOTTOM_BACK_RIGHT	0xB2
+#define UAC3_CH_BOTTOM_BACK_CENTER	0xB3
+#define UAC3_CH_BOTTOM_BACK_LOC		0xB4
+#define UAC3_CH_BOTTOM_BACK_ROC		0xB5
+#define UAC3_CH_BOTTOM_BACK_WIDE_LEFT	0xB6
+#define UAC3_CH_BOTTOM_BACK_WIDE_RIGHT	0xB7
+#define UAC3_CH_LOW_FREQUENCY_EFFECTS	0xB8
+#define UAC3_CH_LFE_LEFT		0xB9
+#define UAC3_CH_LFE_RIGHT		0xBA
+#define UAC3_CH_HEADPHONE_LEFT		0xBB
+#define UAC3_CH_HEADPHONE_RIGHT		0xBC
+
+/* A.15 AUDIO CLASS-SPECIFIC AC INTERFACE DESCRIPTOR SUBTYPES */
+/* see audio.h for the rest, which is identical to v1 */
+#define UAC3_EXTENDED_TERMINAL		0x04
+#define UAC3_MIXER_UNIT			0x05
+#define UAC3_SELECTOR_UNIT		0x06
+#define UAC3_FEATURE_UNIT		0x07
+#define UAC3_EFFECT_UNIT		0x08
+#define UAC3_PROCESSING_UNIT		0x09
+#define UAC3_EXTENSION_UNIT		0x0a
+#define UAC3_CLOCK_SOURCE		0x0b
+#define UAC3_CLOCK_SELECTOR		0x0c
+#define UAC3_CLOCK_MULTIPLIER		0x0d
+#define UAC3_SAMPLE_RATE_CONVERTER	0x0e
+#define UAC3_CONNECTORS			0x0f
+#define UAC3_POWER_DOMAIN		0x10
+
+/* A.22 AUDIO CLASS-SPECIFIC REQUEST CODES */
+/* see audio-v2.h for the rest, which is identical to v2 */
+#define UAC3_CS_REQ_INTEN			0x04
+#define UAC3_CS_REQ_STRING			0x05
+#define UAC3_CS_REQ_HIGH_CAPABILITY_DESCRIPTOR	0x06
+
+/* A.23.1 AUDIOCONTROL INTERFACE CONTROL SELECTORS */
+#define UAC3_AC_CONTROL_UNDEFINED		0x00
+#define UAC3_AC_ACTIVE_INTERFACE_CONTROL	0x01
+#define UAC3_AC_POWER_DOMAIN_CONTROL		0x02
+
+#endif /* __LINUX_USB_AUDIO_V3_H */