usb: Introduce DesignWare USB3 DRD Driver

The DesignWare USB3 is a highly
configurable IP Core which can be
instantiated as Dual-Role Device (DRD),
Peripheral Only and Host Only (XHCI)
configurations.

Several other parameters can be configured
like amount of FIFO space, amount of TX and
RX endpoints, amount of Host Interrupters,
etc.

The current driver has been validated with
a virtual model of version 1.73a of that core
and with an FPGA burned with version 1.83a
of the DRD core. We have support for PCIe
bus, which is used on FPGA prototyping, and
for the OMAP5, more adaptation (or glue)
layers can be easily added and the driver
is half prepared to handle any possible
configuration the HW engineer has chosen
considering we have the information on
one of the GHWPARAMS registers to do
runtime checking of certain features.

More runtime checks can, and should, be added
in order to make this driver even more flexible
with regards to number of endpoints, FIFO sizes,
transfer types, etc.

While this supports only the device side, for
now, we will add support for Host side (xHCI -
see the updated series Sebastian has sent [1])
and OTG after we have it all stabilized.

[1] http://marc.info/?l=linux-usb&m=131341992020339&w=2

Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 12 insertions, 0 deletions

diff --git a/drivers/usb/gadget/Kconfig b/drivers/usb/gadget/Kconfig
index 5a084b9cfa3c..bb799d5b9ab6 100644
--- a/drivers/usb/gadget/Kconfig
+++ b/drivers/usb/gadget/Kconfig
@@ -303,6 +303,18 @@ config USB_PXA_U2O
           PXA9xx Processor series include a high speed USB2.0 device
           controller, which support high speed and full speed USB peripheral.
 
+config USB_GADGET_DWC3
+        tristate "DesignWare USB3.0 (DRD) Controller"
+        depends on USB_DWC3
+        select USB_GADGET_DUALSPEED
+        select USB_GADGET_SUPERSPEED
+        help
+          DesignWare USB3.0 controller is a SuperSpeed USB3.0 Controller
+          which can be configured for peripheral-only, host-only, hub-only
+          and Dual-Role operation. This Controller was first integrated into
+          the OMAP5 series of processors. More information about the OMAP5
+          version of this controller, refer to http://www.ti.com/omap5.
+
 #
 # Controllers available in both integrated and discrete versions
 #