X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=drivers%2Fusb%2Fhost%2FKconfig;fp=drivers%2Fusb%2Fhost%2FKconfig;h=b93d71d28db7a04a011735318973181e953eedbf;hb=16c70f8c1b54b61c3b951b6fb220df250fe09b32;hp=e27b79a3c05f53e8ce1a0117d62d187fa051a030;hpb=4e76c8a9fa413ccc09d3f7f664183dcce3555d57;p=linux-2.6.git

diff --git a/drivers/usb/host/Kconfig b/drivers/usb/host/Kconfig
index e27b79a3c..b93d71d28 100644
--- a/drivers/usb/host/Kconfig
+++ b/drivers/usb/host/Kconfig
@@ -47,12 +47,29 @@ config USB_EHCI_ROOT_HUB_TT
 	  controller is needed.  It's safe to say "y" even if your
 	  controller doesn't support this feature.
 
-	  This supports the EHCI implementation from TransDimension Inc.
+	  This supports the EHCI implementation that's originally
+	  from ARC, and has since changed hands a few times.
+
+config USB_EHCI_TT_NEWSCHED
+	bool "Improved Transaction Translator scheduling (EXPERIMENTAL)"
+	depends on USB_EHCI_HCD && EXPERIMENTAL
+	---help---
+	  This changes the periodic scheduling code to fill more of the low
+	  and full speed bandwidth available from the Transaction Translator
+	  (TT) in USB 2.0 hubs.  Without this, only one transfer will be
+	  issued in each microframe, significantly reducing the number of
+	  periodic low/fullspeed transfers possible.
+
+	  If you have multiple periodic low/fullspeed devices connected to a
+	  highspeed USB hub which is connected to a highspeed USB Host
+	  Controller, and some of those devices will not work correctly
+	  (possibly due to "ENOSPC" or "-28" errors), say Y.
+
+	  If unsure, say N.
 
 config USB_ISP116X_HCD
 	tristate "ISP116X HCD support"
 	depends on USB
-	default N
 	---help---
 	  The ISP1160 and ISP1161 chips are USB host controllers. Enable this
 	  option if your board has this chip. If unsure, say N.
@@ -127,7 +144,6 @@ config USB_UHCI_HCD
 config USB_SL811_HCD
 	tristate "SL811HS HCD support"
 	depends on USB
-	default N
 	help
 	  The SL811HS is a single-port USB controller that supports either
 	  host side or peripheral side roles.  Enable this option if your
@@ -140,7 +156,6 @@ config USB_SL811_HCD
 config USB_SL811_CS
 	tristate "CF/PCMCIA support for SL811HS HCD"
 	depends on USB_SL811_HCD && PCMCIA
-	default N
 	help
 	  Wraps a PCMCIA driver around the SL811HS HCD, supporting the RATOC
 	  REX-CFU1U CF card (often used with PDAs).  If unsure, say N.