diff options
| author | david-b@pacbell.net <david-b@pacbell.net> | 2005-08-14 05:44:58 +0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2005-09-09 03:28:36 +0400 |
| commit | d0384200f6b608e77fb5ddf7dfae1bf0e42c1c6e (patch) | |
| tree | 4ab0d9bcf70a42a2c75b7a4aca7a757e7085ee94 /drivers/usb/host | |
| parent | e09711aef4180002241c7f2eab37390ddf40d6a0 (diff) | |
| download | linux-d0384200f6b608e77fb5ddf7dfae1bf0e42c1c6e.tar.xz | |
[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 <ddstreet@ieee.org>
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/usb/host')
| -rw-r--r-- | drivers/usb/host/ehci-q.c | 7 | ||||
| -rw-r--r-- | drivers/usb/host/ehci-sched.c | 4 | ||||
| -rw-r--r-- | drivers/usb/host/ehci.h | 2 |
3 files changed, 13 insertions, 0 deletions
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; } } diff --git a/drivers/usb/host/ehci-sched.c b/drivers/usb/host/ehci-sched.c index 4c972b57c7c3..ccc7300baa6d 100644 --- a/drivers/usb/host/ehci-sched.c +++ b/drivers/usb/host/ehci-sched.c @@ -700,6 +700,7 @@ iso_stream_init ( } else { u32 addr; + int think_time; addr = dev->ttport << 24; if (!ehci_is_TDI(ehci) @@ -709,6 +710,9 @@ iso_stream_init ( addr |= epnum << 8; addr |= dev->devnum; stream->usecs = HS_USECS_ISO (maxp); + think_time = dev->tt ? dev->tt->think_time : 0; + stream->tt_usecs = NS_TO_US (think_time + usb_calc_bus_time ( + dev->speed, is_input, 1, maxp)); if (is_input) { u32 tmp; diff --git a/drivers/usb/host/ehci.h b/drivers/usb/host/ehci.h index a7542157534c..20c9b550097d 100644 --- a/drivers/usb/host/ehci.h +++ b/drivers/usb/host/ehci.h @@ -421,6 +421,7 @@ struct ehci_qh { u8 usecs; /* intr bandwidth */ u8 gap_uf; /* uframes split/csplit gap */ u8 c_usecs; /* ... split completion bw */ + u16 tt_usecs; /* tt downstream bandwidth */ unsigned short period; /* polling interval */ unsigned short start; /* where polling starts */ #define NO_FRAME ((unsigned short)~0) /* pick new start */ @@ -479,6 +480,7 @@ struct ehci_iso_stream { */ u8 interval; u8 usecs, c_usecs; + u16 tt_usecs; u16 maxp; u16 raw_mask; unsigned bandwidth; |