2 files changed, 29 insertions, 2 deletions

diff --git a/include/linux/usb/audio-v2.h b/include/linux/usb/audio-v2.h
index 0952231e6c3f..2389f93a28b5 100644
--- a/include/linux/usb/audio-v2.h
+++ b/include/linux/usb/audio-v2.h
@@ -105,6 +105,17 @@ struct uac_as_header_descriptor_v2 {
         __u8 iChannelNames;
 } __attribute__((packed));
 
+/* 6.1 Interrupt Data Message */
+
+#define UAC2_INTERRUPT_DATA_MSG_VENDOR  (1 << 0)
+#define UAC2_INTERRUPT_DATA_MSG_EP      (1 << 1)
+
+struct uac2_interrupt_data_msg {
+        __u8 bInfo;
+        __u8 bAttribute;
+        __le16 wValue;
+        __le16 wIndex;
+} __attribute__((packed));
 
 /* A.7 Audio Function Category Codes */
 #define UAC2_FUNCTION_SUBCLASS_UNDEFINED        0x00
@@ -153,6 +164,7 @@ struct uac_as_header_descriptor_v2 {
 /* A.14 Audio Class-Specific Request Codes */
 #define UAC2_CS_CUR                     0x01
 #define UAC2_CS_RANGE                   0x02
+#define UAC2_CS_MEM                     0x03
 
 /* A.15 Encoder Type Codes */
 #define UAC2_ENCODER_UNDEFINED          0x00
diff --git a/include/linux/usb/audio.h b/include/linux/usb/audio.h
index 905a87caf3fb..c0ef18dc2da7 100644
--- a/include/linux/usb/audio.h
+++ b/include/linux/usb/audio.h
@@ -244,7 +244,7 @@ struct uac_selector_unit_descriptor {
 static inline __u8 uac_selector_unit_iSelector(struct uac_selector_unit_descriptor *desc)
 {
         __u8 *raw = (__u8 *) desc;
-        return raw[desc->bLength - 1];
+        return raw[9 + desc->bLength - 1];
 }
 
 /* 4.3.2.5 Feature Unit Descriptor */
@@ -456,7 +456,7 @@ struct uac_iso_endpoint_descriptor {
         __u8  bmAttributes;
         __u8  bLockDelayUnits;
         __le16 wLockDelay;
-};
+} __attribute__((packed));
 #define UAC_ISO_ENDPOINT_DESC_SIZE      7
 
 #define UAC_EP_CS_ATTR_SAMPLE_RATE      0x01
@@ -488,6 +488,21 @@ struct uac_iso_endpoint_descriptor {
 #define UAC_FU_BASS_BOOST       (1 << (UAC_BASS_BOOST_CONTROL - 1))
 #define UAC_FU_LOUDNESS         (1 << (UAC_LOUDNESS_CONTROL - 1))
 
+/* status word format (3.7.1.1) */
+
+#define UAC1_STATUS_TYPE_ORIG_MASK              0x0f
+#define UAC1_STATUS_TYPE_ORIG_AUDIO_CONTROL_IF  0x0
+#define UAC1_STATUS_TYPE_ORIG_AUDIO_STREAM_IF   0x1
+#define UAC1_STATUS_TYPE_ORIG_AUDIO_STREAM_EP   0x2
+
+#define UAC1_STATUS_TYPE_IRQ_PENDING            (1 << 7)
+#define UAC1_STATUS_TYPE_MEM_CHANGED            (1 << 6)
+
+struct uac1_status_word {
+        __u8 bStatusType;
+        __u8 bOriginator;
+} __attribute__((packed));
+
 #ifdef __KERNEL__
 
 struct usb_audio_control {