usb: dwc2: Update Kconfig to support dual-role

Update DWC2 kconfig and makefile to support dual-role mode. The platform
file will always get compiled for the case where the controller is directly
connected to the CPU. So for loadable modules, only dwc2.ko is needed.

Signed-off-by: Dinh Nguyen <dinguyen@opensource.altera.com>
Acked-by: Paul Zimmerman <paulz@synopsys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/usb/dwc2/Kconfig b/drivers/usb/dwc2/Kconfig
index f93807b..4396a1f 100644 (file)
--- a/drivers/usb/dwc2/Kconfig
+++ b/drivers/usb/dwc2/Kconfig
@@ -1,40 +1,29 @@
 config USB_DWC2
-       bool "DesignWare USB2 DRD Core Support"
+       tristate "DesignWare USB2 DRD Core Support"
        depends on USB
        help
          Say Y here if your system has a Dual Role Hi-Speed USB
          controller based on the DesignWare HSOTG IP Core.
 
-         For host mode, if you choose to build the driver as dynamically
-         linked modules, the core module will be called dwc2.ko, the PCI
-         bus interface module (if you have a PCI bus system) will be
-         called dwc2_pci.ko, and the platform interface module (for
-         controllers directly connected to the CPU) will be called
-         dwc2_platform.ko. For gadget mode, there will be a single
-         module called dwc2_gadget.ko.
-
-         NOTE: The s3c-hsotg driver is now renamed to dwc2_gadget. The
-         host and gadget drivers are still currently separate drivers.
-         There are plans to merge the dwc2_gadget driver with the dwc2
-         host driver in the near future to create a dual-role driver.
+         If you choose to build the driver as dynamically
+         linked modules, a single dwc2.ko(regardless of mode of operation)
+         will get built for both platform IPs and PCI.
 
 if USB_DWC2
 
+choice
+       bool "DWC2 Mode Selection"
+       default USB_DWC2_DUAL_ROLE if (USB && USB_GADGET)
+       default USB_DWC2_HOST if (USB && !USB_GADGET)
+       default USB_DWC2_PERIPHERAL if (!USB && USB_GADGET)
+
 config USB_DWC2_HOST
-       tristate "Host only mode"
+       bool "Host only mode"
        depends on USB
        help
          The Designware USB2.0 high-speed host controller
-         integrated into many SoCs.
-
-config USB_DWC2_PLATFORM
-       bool "DWC2 Platform"
-       depends on USB_DWC2_HOST
-       default USB_DWC2_HOST
-       help
-         The Designware USB2.0 platform interface module for
-         controllers directly connected to the CPU. This is only
-         used for host mode.
+         integrated into many SoCs. Select this option if you want the
+         driver to operate in Host-only mode.
 
 config USB_DWC2_PCI
        bool "DWC2 PCI"
@@ -47,11 +36,31 @@ config USB_DWC2_PCI
 comment "Gadget mode requires USB Gadget support to be enabled"
 
 config USB_DWC2_PERIPHERAL
-       tristate "Gadget only mode"
-       depends on USB_GADGET
+       bool "Gadget only mode"
+       depends on USB_GADGET=y || USB_GADGET=USB_DWC2
        help
          The Designware USB2.0 high-speed gadget controller
-         integrated into many SoCs.
+         integrated into many SoCs. Select this option if you want the
+         driver to operate in Peripheral-only mode. This option requires
+         USB_GADGET=y.
+
+config USB_DWC2_DUAL_ROLE
+       bool "Dual Role mode"
+       depends on ((USB=y || USB=USB_DWC2) && (USB_GADGET=y || USB_GADGET=USB_DWC2))
+       help
+         Select this option if you want the driver to work in a dual-role
+         mode. In this mode both host and gadget features are enabled, and
+         the role will be determined by the cable that gets plugged-in. This
+         option requires USB_GADGET=y.
+endchoice
+
+config USB_DWC2_PLATFORM
+       bool
+        depends on !PCI
+        default y
+        help
+          The Designware USB2.0 platform interface module for
+          controllers directly connected to the CPU.
 
 config USB_DWC2_DEBUG
        bool "Enable Debugging Messages"

diff --git a/drivers/usb/dwc2/Makefile b/drivers/usb/dwc2/Makefile
index b73d2a5..3026135 100644 (file)
--- a/drivers/usb/dwc2/Makefile
+++ b/drivers/usb/dwc2/Makefile
@@ -1,10 +1,17 @@
 ccflags-$(CONFIG_USB_DWC2_DEBUG)       += -DDEBUG
 ccflags-$(CONFIG_USB_DWC2_VERBOSE)     += -DVERBOSE_DEBUG
 
-obj-$(CONFIG_USB_DWC2_HOST)            += dwc2.o
+obj-$(CONFIG_USB_DWC2)                 += dwc2.o
 dwc2-y                                 := core.o core_intr.o
-dwc2-y                                 += hcd.o hcd_intr.o
-dwc2-y                                 += hcd_queue.o hcd_ddma.o
+
+ifneq ($(filter y,$(CONFIG_USB_DWC2_HOST) $(CONFIG_USB_DWC2_DUAL_ROLE)),)
+       dwc2-y                          += hcd.o hcd_intr.o
+       dwc2-y                          += hcd_queue.o hcd_ddma.o
+endif
+
+ifneq ($(filter y,$(CONFIG_USB_DWC2_PERIPHERAL) $(CONFIG_USB_DWC2_DUAL_ROLE)),)
+       dwc2-y                          += gadget.o
+endif
 
 # NOTE: The previous s3c-hsotg peripheral mode only driver has been moved to
 # this location and renamed gadget.c. When building for dynamically linked
@@ -19,10 +26,4 @@ ifneq ($(CONFIG_USB_DWC2_PCI),)
        dwc2_pci-y                      := pci.o
 endif
 
-ifneq ($(CONFIG_USB_DWC2_PLATFORM),)
-       obj-$(CONFIG_USB_DWC2_HOST)     += dwc2_platform.o
-       dwc2_platform-y                 := platform.o
-endif
-
-obj-$(CONFIG_USB_DWC2_PERIPHERAL)      += dwc2_gadget.o
-dwc2_gadget-y                          := gadget.o
+dwc2-$(CONFIG_USB_DWC2_PLATFORM) += platform.o