/* 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];
};
/* Queue Head (QH). */