diff options
Diffstat (limited to 'drivers/usb/host/Kconfig')
| -rw-r--r-- | drivers/usb/host/Kconfig | 23 |
1 files changed, 19 insertions, 4 deletions
diff --git a/drivers/usb/host/Kconfig b/drivers/usb/host/Kconfig index e27b79a3c05..b93d71d28db 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. |