Invalidate dcache before starting the DMA to ensure coherency. In case
there are any dirty lines from the DMA buffer in the cache, subsequent
cache-line replacements may corrupt the buffer in memory while the DMA
is still going on. Cache-line replacement can happen if the CPU tries to
bring some other memory locations into the cache while the DMA is going
on.
Signed-off-by: Ziyuan Xu <xzy.xu@rock-chips.com>
Acked-by: Simon Glass <sjg@chromium.org>
Remaining bytes means bytes that are not yet transferred
and not the bytes that were transferred in the last transfer.
Reported-by: Lukasz Majewski <l.majewski@samsung.com>
Signed-off-by: Roger Quadros <rogerq@ti.com>
Tested-by: Steve Rae <srae@broadcom.com>
[Test HW: bcm28155_ap board]
Request size can be greater than ep.packet and still end in a
short packet. We need to tackle this case as end of transfer
(if short_not_ok is not set) as indicated in USB 2.0 Specification [1],
else we get stuck up on certain protocols like fastboot.
[1] - USB2.0 Specification, Section 5.3.2 Pipes
Reported-by: Steve Rae <steve.rae@broadcom.com>
Signed-off-by: Roger Quadros <rogerq@ti.com>
Tested-by: Steve Rae <steve.rae@broadcom.com>
Tested-by: Lukasz Majewski <l.majewski@samsung.com>
The driver is actually for the Designware DWC2 controller.
Tweak the comments in the driver to reflect this fact.
Signed-off-by: Marek Vasut <marex@denx.de>
The driver is actually for the Designware DWC2 controller.
This patch renames the remaining S3C_* macros to match the
DWC2 naming.
Signed-off-by: Marek Vasut <marex@denx.de>
The driver is actually for the Designware DWC2 controller.
This patch renames the local source files to dwc2_*c and
adjusts the Makefile to use the new names.
Signed-off-by: Marek Vasut <marex@denx.de>
2015-12-17 21:54:40 +01:00
Renamed from drivers/usb/gadget/s3c_udc_otg_xfer_dma.c (Browse further)
