ALSA: usb-audio: parse UAC2 endpoint descriptors correctly

[safe/jmp/linux-2.6] / include / linux / usb / audio-v2.h

diff --git a/include/linux/usb/audio-v2.h b/include/linux/usb/audio-v2.h
index 2389f93..92f1d99 100644 (file)
--- a/include/linux/usb/audio-v2.h
+++ b/include/linux/usb/audio-v2.h
@@ -105,6 +105,22 @@ struct uac_as_header_descriptor_v2 {
        __u8 iChannelNames;
 } __attribute__((packed));
 
+/* 4.10.1.2 Class-Specific AS Isochronous Audio Data Endpoint Descriptor */
+
+struct uac2_iso_endpoint_descriptor {
+       __u8  bLength;                  /* in bytes: 8 */
+       __u8  bDescriptorType;          /* USB_DT_CS_ENDPOINT */
+       __u8  bDescriptorSubtype;       /* EP_GENERAL */
+       __u8  bmAttributes;
+       __u8  bmControls;
+       __u8  bLockDelayUnits;
+       __le16 wLockDelay;
+} __attribute__((packed));
+
+#define UAC2_CONTROL_PITCH             (3 << 0)
+#define UAC2_CONTROL_DATA_OVERRUN      (3 << 2)
+#define UAC2_CONTROL_DATA_UNDERRUN     (3 << 4)
+
 /* 6.1 Interrupt Data Message */
 
 #define UAC2_INTERRUPT_DATA_MSG_VENDOR (1 << 0)