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2 Commits

Author SHA1 Message Date
Martin Fuzzey
d0cc3d4100 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>
 2010-10-22 10:22:03 -07:00
Martin Fuzzey
23d3e7a659 USB: MXC: Add i.MX21 specific USB host controller driver. 
This driver is a Full / Low speed only USB host for the i.MX21.

Signed-off-by: Martin Fuzzey <mfuzzey@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
 2010-03-02 14:52:55 -08:00