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authordavid-b@pacbell.net <david-b@pacbell.net>2005-08-14 03:41:04 +0200
committerGreg Kroah-Hartman <gregkh@suse.de>2005-09-09 01:28:35 +0200
commite09711aef4180002241c7f2eab37390ddf40d6a0 (patch)
tree9a537e417df8b8ab0d8e121f6a3e596898ec8ec0 /drivers/usb/core/hub.h
parent[PATCH] USB: usbnet (9/9) module for pl2301/2302 cables (diff)
downloadlinux-e09711aef4180002241c7f2eab37390ddf40d6a0.tar.xz
linux-e09711aef4180002241c7f2eab37390ddf40d6a0.zip
[PATCH] ehci: add think_time
This adds think_time to the usb_tt struct and sets it appropriately (measured in ns); this can help us implement better split transaction scheduling. 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/core/hub.h')
-rw-r--r--drivers/usb/core/hub.h7
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/usb/core/hub.h b/drivers/usb/core/hub.h
index 53bf5649621e..e7fa9b5a521e 100644
--- a/drivers/usb/core/hub.h
+++ b/drivers/usb/core/hub.h
@@ -157,6 +157,12 @@ enum hub_led_mode {
struct usb_device;
+/* Transaction Translator Think Times, in bits */
+#define HUB_TTTT_8_BITS 0x00
+#define HUB_TTTT_16_BITS 0x20
+#define HUB_TTTT_24_BITS 0x40
+#define HUB_TTTT_32_BITS 0x60
+
/*
* 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).
@@ -170,6 +176,7 @@ 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;