at91: USB gadget subsystem cleanup and driver fix.

Signed-off-by: Owen Kirby <osk@exegin.com>

SVN-Revision: 44491

target/linux/at91/Makefile

@@ -10,13 +10,13 @@ ARCH:=arm
 BOARD:=at91
 MAINTAINER:=Claudio Mignanti <c.mignanti@gmail.com>
 BOARDNAME:=Atmel AT91
-FEATURES:=squashfs targz ext2 usb
+FEATURES:=squashfs targz ext2 usb usbgadget ubifs
 SUBTARGETS:=legacy sama5d3
 
 KERNEL_PATCHVER:=3.18
 
 include $(INCLUDE_DIR)/target.mk
 
-DEFAULT_PACKAGES += kmod-usb-ohci
+DEFAULT_PACKAGES += kmod-usb-ohci kmod-at91-udc kmod-usb-eth-gadget
 
 $(eval $(call BuildTarget))

target/linux/at91/config-default

@@ -215,15 +215,7 @@ CONFIG_UID16=y
 CONFIG_UIDGID_CONVERTED=y
 CONFIG_UNCOMPRESS_INCLUDE="mach/uncompress.h"
 # CONFIG_USB_ARCH_HAS_XHCI is not set
-CONFIG_USB_AT91=y
 # CONFIG_USB_ATMEL_USBA is not set
-CONFIG_USB_COMMON=y
-CONFIG_USB_ETH=y
-# CONFIG_USB_ETH_EEM is not set
-CONFIG_USB_ETH_RNDIS=y
-CONFIG_USB_GADGET=y
-# CONFIG_USB_GADGET_XILINX is not set
-CONFIG_USB_LIBCOMPOSITE=y
 CONFIG_USB_SUPPORT=y
 CONFIG_USE_OF=y
 CONFIG_VECTORS_BASE=0xffff0000

target/linux/at91/modules.mk

@@ -50,6 +50,24 @@ endef
 
 $(eval $(call KernelPackage,at91-adc))
 
+define KernelPackage/at91-udc
+  SUBMENU:=$(USB_MENU)
+  TITLE:=USB Device Controller on atmel SoC
+  DEPENDS:=@TARGET_at91 +kmod-usb-gadget
+  KCONFIG:=CONFIG_USB_AT91
+ifneq ($(wildcard $(LINUX_DIR)/drivers/usb/gadget/udc/at91_udc.ko),)
+  FILES:=$(LINUX_DIR)/drivers/usb/gadget/udc/at91_udc.ko
+else
+  FILES:=$(LINUX_DIR)/drivers/usb/gadget/at91_udc.ko
+endif
+  AUTOLOAD:=$(call AutoLoad,51,at91_udc)
+endef
+
+define KernelPackage/at91-adc/description
+ Kernel module to use the USB Device controller for Atmel AT91
+endef
+
+$(eval $(call KernelPackage,at91-udc))
 
 I2C_AT91_MODULES:=\
   CONFIG_I2C_AT91:drivers/i2c/busses/i2c-at91

target/linux/at91/patches/100-ARM-at91-build-dtb-for-LMU5000.patch

@@ -1,6 +1,6 @@
 --- a/arch/arm/boot/dts/Makefile
 +++ b/arch/arm/boot/dts/Makefile
-@@ -26,6 +26,7 @@ dtb-$(CONFIG_ARCH_AT91) += usb_a9g20.dtb
+@@ -28,6 +28,7 @@ dtb-$(CONFIG_ARCH_AT91) += usb_a9g20.dtb
  dtb-$(CONFIG_ARCH_AT91) += usb_a9g20_lpw.dtb
  # sam9g45
  dtb-$(CONFIG_ARCH_AT91) += at91sam9m10g45ek.dtb

target/linux/at91/patches/200-ARM-at91-udc-clockfix-backport.patch

@@ -0,0 +1,82 @@
+--- a/drivers/usb/gadget/udc/at91_udc.c
++++ b/drivers/usb/gadget/udc/at91_udc.c
+@@ -870,8 +870,6 @@
+ 		return;
+ 	udc->clocked = 1;
+ 
+-	if (IS_ENABLED(CONFIG_COMMON_CLK))
+-		clk_enable(udc->uclk);
+ 	clk_enable(udc->iclk);
+ 	clk_enable(udc->fclk);
+ }
+@@ -884,8 +882,6 @@
+ 	udc->gadget.speed = USB_SPEED_UNKNOWN;
+ 	clk_disable(udc->fclk);
+ 	clk_disable(udc->iclk);
+-	if (IS_ENABLED(CONFIG_COMMON_CLK))
+-		clk_disable(udc->uclk);
+ }
+ 
+ /*
+@@ -1766,27 +1762,18 @@
+ 	udc_reinit(udc);
+ 
+ 	/* get interface and function clocks */
+-	udc->iclk = clk_get(dev, "udc_clk");
+-	udc->fclk = clk_get(dev, "udpck");
+-	if (IS_ENABLED(CONFIG_COMMON_CLK))
+-		udc->uclk = clk_get(dev, "usb_clk");
+-	if (IS_ERR(udc->iclk) || IS_ERR(udc->fclk) ||
+-	    (IS_ENABLED(CONFIG_COMMON_CLK) && IS_ERR(udc->uclk))) {
++	udc->iclk = clk_get(dev, "pclk");
++	udc->fclk = clk_get(dev, "hclk");
++	if (IS_ERR(udc->iclk) || IS_ERR(udc->fclk)) {
+ 		DBG("clocks missing\n");
+ 		retval = -ENODEV;
+ 		goto fail1;
+ 	}
+ 
+-	/* don't do anything until we have both gadget driver and VBUS */
+-	if (IS_ENABLED(CONFIG_COMMON_CLK)) {
+-		clk_set_rate(udc->uclk, 48000000);
+-		retval = clk_prepare(udc->uclk);
+-		if (retval)
+-			goto fail1;
+-	}
++	clk_set_rate(udc->fclk, 48000000);
+ 	retval = clk_prepare(udc->fclk);
+ 	if (retval)
+-		goto fail1a;
++		goto fail1;
+ 
+ 	retval = clk_prepare_enable(udc->iclk);
+ 	if (retval)
+@@ -1860,12 +1847,7 @@
+ 	clk_unprepare(udc->iclk);
+ fail1b:
+ 	clk_unprepare(udc->fclk);
+-fail1a:
+-	if (IS_ENABLED(CONFIG_COMMON_CLK))
+-		clk_unprepare(udc->uclk);
+ fail1:
+-	if (IS_ENABLED(CONFIG_COMMON_CLK) && !IS_ERR(udc->uclk))
+-		clk_put(udc->uclk);
+ 	if (!IS_ERR(udc->fclk))
+ 		clk_put(udc->fclk);
+ 	if (!IS_ERR(udc->iclk))
+@@ -1911,15 +1893,11 @@
+ 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ 	release_mem_region(res->start, resource_size(res));
+ 
+-	if (IS_ENABLED(CONFIG_COMMON_CLK))
+-		clk_unprepare(udc->uclk);
+ 	clk_unprepare(udc->fclk);
+ 	clk_unprepare(udc->iclk);
+ 
+ 	clk_put(udc->iclk);
+ 	clk_put(udc->fclk);
+-	if (IS_ENABLED(CONFIG_COMMON_CLK))
+-		clk_put(udc->uclk);
+ 
+ 	return 0;
+ }