diff options
Diffstat (limited to 'include/usb_defs.h')
| -rw-r--r-- | include/usb_defs.h | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/include/usb_defs.h b/include/usb_defs.h index 273337f..b7f2ead 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 @@ -310,6 +311,17 @@ #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 */ |