Changeset 4e732f1a in mainline for uspace/lib/usb/include/usb/descriptor.h

Timestamp:

2014-01-24T02:10:16Z (10 years ago)

Author:

Jan Vesely <jano.vesely@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

42de21a

Parents:

3de7a62

Message:

usb: Add support for multiple packets per microframe.

File:

• uspace/lib/usb/include/usb/descriptor.h (modified) (1 diff)

uspace/lib/usb/include/usb/descriptor.h

@@ -197 +197 @@
          */
         uint8_t attributes;
-        /** Maximum packet size. */
+        /** Maximum packet size.
+         * Lower 10 bits represent the actuall size
+         * Bits 11,12 specify addtional transfer opportunitities for
+         * HS INT and ISO transfers. */
         uint16_t max_packet_size;
+#define ED_MPS_PACKET_SIZE_MASK  0x3ff
+#define ED_MPS_PACKET_SIZE_GET(value) \
+        ((value) & ED_MPS_PACKET_SIZE_MASK)
+#define ED_MPS_TRANS_OPPORTUNITIES_GET(value) \
+        ((((value) >> 10) & 0x3) + 1)
         /** Polling interval in milliseconds.
          * Ignored for bulk and control endpoints.