ALSA: sound/usb: add preliminary support for UAC2 interrupts

[deliverable/linux.git] / include / linux / usb / audio-v2.h

diff --git a/include/linux/usb/audio-v2.h b/include/linux/usb/audio-v2.h
index 0952231e6c3f31dacff93726de362723ebad502a..2389f93a28b568fa47a73bf83dc70b9f590fe433 100644 (file)
--- 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