USB: sync Queue Element Transfer Descriptor against EHCI spec

[oweals/u-boot.git] / drivers / usb / host / ehci.h

diff --git a/drivers/usb/host/ehci.h b/drivers/usb/host/ehci.h
index 6fae8baf9505972e4403dc7bba46e53f78ac6592..d3aa55b4a6c70a40ff6f584b22ca8b482b4d7c4e 100644 (file)
--- a/drivers/usb/host/ehci.h
+++ b/drivers/usb/host/ehci.h
@@ -166,12 +166,16 @@ struct usb_linux_config_descriptor {
 
 /* Queue Element Transfer Descriptor (qTD). */
 struct qTD {
-       uint32_t qt_next;
+       /* this part defined by EHCI spec */
+       uint32_t qt_next;               /* see EHCI 3.5.1 */
 #define        QT_NEXT_TERMINATE       1
-       uint32_t qt_altnext;
-       uint32_t qt_token;
-       uint32_t qt_buffer[5];
-};
+       uint32_t qt_altnext;            /* see EHCI 3.5.2 */
+       uint32_t qt_token;              /* see EHCI 3.5.3 */
+       uint32_t qt_buffer[5];          /* see EHCI 3.5.4 */
+       uint32_t qt_buffer_hi[5];       /* Appendix B */
+       /* pad struct for 32 byte alignment */
+       uint32_t unused[3];
+} __attribute__ ((aligned (32)));
 
 /* Queue Head (QH). */
 struct QH {