X-Git-Url: http://git.ipfire.org/?a=blobdiff_plain;f=include%2Fusb_defs.h;h=b7f2eada07d0e7e711124aaa7f664cc130fbcbb4;hb=04e2cead60616a09ef5f45feae17c0aca0fa8b5f;hp=273337f46a47d7fb9a7537351fa09a3299546a9c;hpb=bbc6f06c0031249bf1983b875e54cb7549bafe60;p=people%2Fms%2Fu-boot.git

diff --git a/include/usb_defs.h b/include/usb_defs.h
index 273337f46a..b7f2eada07 100644
--- a/include/usb_defs.h
+++ b/include/usb_defs.h
@@ -293,6 +293,7 @@
 #define HUB_CHAR_LPSM               0x0003
 #define HUB_CHAR_COMPOUND           0x0004
 #define HUB_CHAR_OCPM               0x0018
+#define HUB_CHAR_TTTT               0x0060 /* TT Think Time mask */
 
 /*
  * Hub Status & Hub Change bit masks
@@ -309,6 +310,17 @@
 /* Hub class request codes */
 #define USB_REQ_SET_HUB_DEPTH	0x0c
 
+/*
+ * As of USB 2.0, full/low speed devices are segregated into trees.
+ * One type grows from USB 1.1 host controllers (OHCI, UHCI etc).
+ * The other type grows from high speed hubs when they connect to
+ * full/low speed devices using "Transaction Translators" (TTs).
+ */
+struct usb_tt {
+	bool		multi;		/* true means one TT per port */
+	unsigned	think_time;	/* think time in ns */
+};
+
 /*
  * CBI style
  */