From d20db4b4e938aa8e4e5735b5a1b202de5800400e Mon Sep 17 00:00:00 2001 From: Eric Lescouet Date: Sat, 24 Apr 2010 23:38:17 +0200 Subject: USB: split hub.h into ch11.h and merge-in hcd.h Base on inputs from Alan Stern, split the hub.h header into: - new ch11.h header (most of it) containing constants and structures from chapter 11 of the USB 2.0 spec. - a small remaining part being merged into hcd.h. Signed-of-by: Eric Lescouet Cc: Alan Stern Signed-off-by: Greg Kroah-Hartman --- include/linux/usb/hcd.h | 37 ++++++++++++++++++++++++++++++++++++- 1 file changed, 36 insertions(+), 1 deletion(-) (limited to 'include/linux/usb/hcd.h') diff --git a/include/linux/usb/hcd.h b/include/linux/usb/hcd.h index ca228f0..d268415 100644 --- a/include/linux/usb/hcd.h +++ b/include/linux/usb/hcd.h @@ -374,7 +374,42 @@ extern void usb_destroy_configuration(struct usb_device *dev); * HCD Root Hub support */ -#include +#include + +/* + * 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). + * + * TTs should only be known to the hub driver, and high speed bus + * drivers (only EHCI for now). They affect periodic scheduling and + * sometimes control/bulk error recovery. + */ + +struct usb_device; + +struct usb_tt { + struct usb_device *hub; /* upstream highspeed hub */ + int multi; /* true means one TT per port */ + unsigned think_time; /* think time in ns */ + + /* for control/bulk error recovery (CLEAR_TT_BUFFER) */ + spinlock_t lock; + struct list_head clear_list; /* of usb_tt_clear */ + struct work_struct clear_work; +}; + +struct usb_tt_clear { + struct list_head clear_list; + unsigned tt; + u16 devinfo; + struct usb_hcd *hcd; + struct usb_host_endpoint *ep; +}; + +extern int usb_hub_clear_tt_buffer(struct urb *urb); +extern void usb_ep0_reinit(struct usb_device *); /* (shifted) direction/type/recipient from the USB 2.0 spec, table 9.2 */ #define DeviceRequest \ -- cgit v1.1