drivers: usb: musb: add ti musb misc driver for wrapper

Add a misc driver for MUSB wrapper, so that based on dr_mode the
USB devices can bind to USB host or USB device drivers.

Signed-off-by: Mugunthan V N <mugunthanvnm@ti.com>
Reviewed-by: Tom Rini <trini@konsulko.com>

drivers/usb/musb-new/Kconfig

@@ -14,6 +14,15 @@ config USB_MUSB_GADGET
 	help
 	  Enables the MUSB USB dual-role controller in gadget mode.
 
+config USB_MUSB_TI
+	bool "Enable TI OTG USB controller"
+	depends on DM_USB
+	default n
+	help
+	  Say y here to enable support for the dual role high
+	  speed USB controller based on the Mentor Graphics
+	  silicon IP.
+
 if USB_MUSB_HOST || USB_MUSB_GADGET
 
 config USB_MUSB_PIC32

drivers/usb/musb-new/Makefile

@@ -12,6 +12,7 @@ obj-$(CONFIG_USB_MUSB_AM35X) += am35x.o
 obj-$(CONFIG_USB_MUSB_OMAP2PLUS) += omap2430.o
 obj-$(CONFIG_USB_MUSB_PIC32) += pic32.o
 obj-$(CONFIG_USB_MUSB_SUNXI) += sunxi.o
+obj-$(CONFIG_USB_MUSB_TI) += ti-musb.o
 
 ccflags-y := $(call cc-option,-Wno-unused-variable) \
 		$(call cc-option,-Wno-unused-but-set-variable) \

drivers/usb/musb-new/ti-musb.c

@@ -0,0 +1,64 @@
+/*
+ * MISC driver for TI MUSB Glue.
+ *
+ * (C) Copyright 2016
+ *     Texas Instruments Incorporated, <www.ti.com>
+ *
+ * SPDX-License-Identifier:     GPL-2.0+
+ */
+#include <common.h>
+#include <command.h>
+#include <console.h>
+#include <dm.h>
+#include <linux/usb/otg.h>
+#include <dm/device-internal.h>
+#include <dm/lists.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+#ifdef CONFIG_DM_USB
+
+static int ti_musb_wrapper_bind(struct udevice *parent)
+{
+	const void *fdt = gd->fdt_blob;
+	int node;
+	int ret;
+
+	for (node = fdt_first_subnode(fdt, parent->of_offset); node > 0;
+	     node = fdt_next_subnode(fdt, node)) {
+		struct udevice *dev;
+		const char *name = fdt_get_name(fdt, node, NULL);
+		enum usb_dr_mode dr_mode;
+		struct driver *drv;
+
+		if (strncmp(name, "usb@", 4))
+			continue;
+
+		dr_mode = usb_get_dr_mode(node);
+		switch (dr_mode) {
+		case USB_DR_MODE_PERIPHERAL:
+			/* Bind MUSB device */
+			break;
+		case USB_DR_MODE_HOST:
+			/* Bind MUSB host */
+			break;
+		default:
+			break;
+		};
+	}
+	return 0;
+}
+
+static const struct udevice_id ti_musb_ids[] = {
+	{ .compatible = "ti,am33xx-usb" },
+	{ }
+};
+
+U_BOOT_DRIVER(ti_musb_wrapper) = {
+	.name	= "ti-musb-wrapper",
+	.id	= UCLASS_MISC,
+	.of_match = ti_musb_ids,
+	.bind = ti_musb_wrapper_bind,
+};
+
+#endif /* CONFIG_DM_USB */