ALSA: usbaudio: introduce new types for audio class v2
This patch adds some definitions for audio class v2.
Unfortunately, the UNIT types PROCESSING_UNIT and EXTENSION_UNIT have
different numerical representations in both standards, so there is need
for a _V1 add-on now. usbmixer.c is changed accordingly.
Signed-off-by: Daniel Mack <daniel@caiaq.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
diff --git a/include/linux/usb/audio.h b/include/linux/usb/audio.h
index 44f82d8..fb1a97b 100644
--- a/include/linux/usb/audio.h
+++ b/include/linux/usb/audio.h
@@ -25,6 +25,9 @@
#define USB_SUBCLASS_AUDIOSTREAMING 0x02
#define USB_SUBCLASS_MIDISTREAMING 0x03
+#define UAC_VERSION_1 0x00
+#define UAC_VERSION_2 0x20
+
/* A.5 Audio Class-Specific AC Interface Descriptor Subtypes */
#define UAC_HEADER 0x01
#define UAC_INPUT_TERMINAL 0x02
@@ -180,6 +183,19 @@
__le16 wFormatTag; /* The Audio Data Format */
} __attribute__ ((packed));
+struct uac_as_header_descriptor_v2 {
+ __u8 bLength;
+ __u8 bDescriptorType;
+ __u8 bDescriptorSubtype;
+ __u8 bTerminalLink;
+ __u8 bmControls;
+ __u8 bFormatType;
+ __u32 bmFormats;
+ __u8 bNrChannels;
+ __u32 bmChannelConfig;
+ __u8 iChannelNames;
+} __attribute__((packed));
+
#define UAC_DT_AS_HEADER_SIZE 7
/* Formats - A.1.1 Audio Data Format Type I Codes */
@@ -232,6 +248,19 @@
#define UAC_FORMAT_TYPE_I_DISCRETE_DESC_SIZE(n) (8 + (n * 3))
+struct uac_format_type_i_ext_descriptor {
+ __u8 bLength;
+ __u8 bDescriptorType;
+ __u8 bDescriptorSubtype;
+ __u8 bSubslotSize;
+ __u8 bFormatType;
+ __u8 bBitResolution;
+ __u8 bHeaderLength;
+ __u8 bControlSize;
+ __u8 bSideBandProtocol;
+} __attribute__((packed));
+
+
/* Formats - Audio Data Format Type I Codes */
struct uac_format_type_ii_discrete_descriptor {
@@ -245,11 +274,26 @@
__u8 tSamFreq[][3];
} __attribute__((packed));
+struct uac_format_type_ii_ext_descriptor {
+ __u8 bLength;
+ __u8 bDescriptorType;
+ __u8 bDescriptorSubtype;
+ __u8 bFormatType;
+ __u16 wMaxBitRate;
+ __u16 wSamplesPerFrame;
+ __u8 bHeaderLength;
+ __u8 bSideBandProtocol;
+} __attribute__((packed));
+
+
/* Formats - A.2 Format Type Codes */
#define UAC_FORMAT_TYPE_UNDEFINED 0x0
#define UAC_FORMAT_TYPE_I 0x1
#define UAC_FORMAT_TYPE_II 0x2
#define UAC_FORMAT_TYPE_III 0x3
+#define UAC_EXT_FORMAT_TYPE_I 0x81
+#define UAC_EXT_FORMAT_TYPE_II 0x82
+#define UAC_EXT_FORMAT_TYPE_III 0x83
struct uac_iso_endpoint_descriptor {
__u8 bLength; /* in bytes: 7 */
@@ -265,6 +309,19 @@
#define UAC_EP_CS_ATTR_PITCH_CONTROL 0x02
#define UAC_EP_CS_ATTR_FILL_MAX 0x80
+/* Audio class v2.0: CLOCK_SOURCE descriptor */
+
+struct uac_clock_source_descriptor {
+ __u8 bLength;
+ __u8 bDescriptorType;
+ __u8 bDescriptorSubtype;
+ __u8 bClockID;
+ __u8 bmAttributes;
+ __u8 bmControls;
+ __u8 bAssocTerminal;
+ __u8 iClockSource;
+} __attribute__((packed));
+
/* A.10.2 Feature Unit Control Selectors */
struct uac_feature_unit_descriptor {