|author||Chris Metcalf <firstname.lastname@example.org>||2012-06-16 16:41:05 -0400|
|committer||Chris Metcalf <email@example.com>||2012-07-18 16:40:35 -0400|
bounce: allow use of bounce pool via config option
The tilegx USB OHCI support needs the bounce pool since we're not using the IOMMU to handle 32-bit addresses. Signed-off-by: Chris Metcalf <firstname.lastname@example.org>
Diffstat (limited to 'arch/tile/Kconfig')
1 files changed, 6 insertions, 0 deletions
diff --git a/arch/tile/Kconfig b/arch/tile/Kconfig
index cf4bb69ea8e..932e4430f7f 100644
@@ -406,6 +406,12 @@ config TILE_USB
Provides USB host adapter support for the built-in EHCI and OHCI
interfaces on TILE-Gx chips.
+# USB OHCI needs the bounce pool since tilegx will often have more
+# than 4GB of memory, but we don't currently use the IOTLB to present
+# a 32-bit address to OHCI. So we need to use a bounce pool instead.
+ def_bool USB_OHCI_HCD
bool "Support for hot-pluggable devices"