From d0384200f6b608e77fb5ddf7dfae1bf0e42c1c6e Mon Sep 17 00:00:00 2001 From: "david-b@pacbell.net" Date: Sat, 13 Aug 2005 18:44:58 -0700 Subject: [PATCH] ehci: add tt_usecs This adds the field tt_usecs to ehci_qh and ehci_iso_stream, and sets it appropriately when setting them up as periodic endpoints. It records the transation translator's think_time (added in last patch) plus the downstream (i.e. low or full speed) bustime of the transfer associated with each interrupt or iso frame, as calculated by usb_calc_bus_time. Signed-off-by: Dan Streetman Signed-off-by: David Brownell Signed-off-by: Greg Kroah-Hartman --- drivers/usb/host/ehci-q.c | 7 +++++++ 1 file changed, 7 insertions(+) (limited to 'drivers/usb/host/ehci-q.c') diff --git a/drivers/usb/host/ehci-q.c b/drivers/usb/host/ehci-q.c index 20df01a79b2e..940d38ca7d91 100644 --- a/drivers/usb/host/ehci-q.c +++ b/drivers/usb/host/ehci-q.c @@ -677,6 +677,9 @@ qh_make ( goto done; } } else { + struct usb_tt *tt = urb->dev->tt; + int think_time; + /* gap is f(FS/LS transfer times) */ qh->gap_uf = 1 + usb_calc_bus_time (urb->dev->speed, is_input, 0, maxp) / (125 * 1000); @@ -690,6 +693,10 @@ qh_make ( qh->c_usecs = HS_USECS (0); } + think_time = tt ? tt->think_time : 0; + qh->tt_usecs = NS_TO_US (think_time + + usb_calc_bus_time (urb->dev->speed, + is_input, 0, max_packet (maxp))); qh->period = urb->interval; } } -- cgit v1.2.3