diff options
| author | Martin Fuzzey <mfuzzey@gmail.com> | 2010-10-01 00:21:59 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2010-10-22 10:22:03 -0700 |
| commit | d0cc3d4100e829d726d7c0fbf5b7b8d2146f60ba (patch) | |
| tree | 94e3c28cc1e11448c74ed0f7be0a19af761f3c6d /drivers/usb/gadget/goku_udc.c | |
| parent | 1dae423dd9b247b048eda00cb598c755e5933213 (diff) | |
| download | linux-next-d0cc3d4100e829d726d7c0fbf5b7b8d2146f60ba.tar.gz | |
USB: imx21-hcd accept arbitary transfer buffer alignement.
The hardware can only do DMA to 4 byte aligned addresses.
When this requirement is not met use PIO or a bounce buffer.
PIO is used when the buffer is small enough to directly
use the hardware data memory (2*maxpacket).
A bounce buffer is used for larger transfers.
Signed-off-by: Martin Fuzzey <mfuzzey@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/usb/gadget/goku_udc.c')
0 files changed, 0 insertions, 0 deletions