USB: net2272: driver for PLX NET2272 USB device controller

This is based on the last release from PLX:
	http://www.plxtech.com/files/products/net2000/software/selectiontool/RE061204-net2272-linux2.6.18.tgz

I've managed to contact them and they've confirmed that this driver was
wholly written by PLX (Seth Levy).  While they have no problem with it
being merged (and they've already licensed it as GPL), they don't have
any interest in doing so themselves as this is an old part for them.

ADI has long had an add-on card which has this part on it, so we've been
keeping it up-to-date out of tree.  But now that PLX has confirmed the
source of the driver, we can can take the next step of cleaning it up and
getting it merged.

So here we are!  I've done quite a large clean up of the driver and
attempted to address all the common issues.  Hopefully in the process,
I haven't broken anything.  While it seems to still work with the board
that I have access to, it is not a PCI variant.  So I have not tested
any of the PCI logic myself (beyond clean compile).  Perhaps someone who
actually has a card and cares can do so.

I'll try to address further feedback, but don't expect miracles.  I'm
not really familiar with the part itself, just the platform glue.

Signed-off-by: Seth Levy <seth.levy@plxtech.com>
Signed-off-by: Ash Aziz <ash.aziz@plxtech.com>
Signed-off-by: Roy Huang <roy.huang@analog.com>
Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 29 insertions, 0 deletions

diff --git a/drivers/usb/gadget/Kconfig b/drivers/usb/gadget/Kconfig
index 58456d1aec21..be44545d6809 100644
--- a/drivers/usb/gadget/Kconfig
+++ b/drivers/usb/gadget/Kconfig
@@ -480,6 +480,35 @@ config USB_CI13XXX_PCI
         default USB_GADGET
         select USB_GADGET_SELECTED
 
+config USB_GADGET_NET2272
+        boolean "PLX NET2272"
+        select USB_GADGET_DUALSPEED
+        help
+          PLX NET2272 is a USB peripheral controller which supports
+          both full and high speed USB 2.0 data transfers.
+
+          It has three configurable endpoints, as well as endpoint zero
+          (for control transfer).
+          Say "y" to link the driver statically, or "m" to build a
+          dynamically linked module called "net2272" and force all
+          gadget drivers to also be dynamically linked.
+
+config USB_GADGET_NET2272_DMA
+        boolean "Support external DMA controller"
+        depends on USB_GADGET_NET2272
+        help
+          The NET2272 part can optionally support an external DMA
+          controller, but your board has to have support in the
+          driver itself.
+
+          If unsure, say "N" here.  The driver works fine in PIO mode.
+
+config USB_NET2272
+        tristate
+        depends on USB_GADGET_NET2272
+        default USB_GADGET
+        select USB_GADGET_SELECTED
+
 config USB_GADGET_NET2280
         boolean "NetChip 228x"
         depends on PCI