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USB: ehci-s5p: add DMA burst support
authorJingoo Han <jg1.han@samsung.com>
Mon, 5 Mar 2012 01:40:14 +0000 (10:40 +0900)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Thu, 8 Mar 2012 21:05:47 +0000 (13:05 -0800)
commit88555a63caafcc86b93b045dfc26cd7a8fa16350
tree2b4fab781d3897dc12b993215d0c51f27bdbae18tree | snapshot (tar.gz zip)
parent30e9eb190f7930bf1edb0ec2d0ce10e300391abdcommit | diff
USB: ehci-s5p: add DMA burst support

DMA burst support is added to improve performance in EHCI data
transfer. The USB EHCI controller on Exynos SoCs can use INCR16,
INCR8, and INCR4 mode. These modes of INSNREG00 register should
be set in order to enable DMA burst transfer. This feature is
also related to AHB spec.

Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: Sangwook Lee <sangwook.lee@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/usb/host/ehci-s5p.c diff | blob | blame | history