usb: isp1760: Move core code to isp1760-core.c

Move core device initialization to a central location in order to share
it with the device mode implementation.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
diff --git a/drivers/usb/host/isp1760-core.c b/drivers/usb/host/isp1760-core.c
new file mode 100644
index 0000000..d38efa0
--- /dev/null
+++ b/drivers/usb/host/isp1760-core.c
@@ -0,0 +1,65 @@
+/*
+ * Driver for the NXP ISP1760 chip
+ *
+ * Copyright 2014 Laurent Pinchart
+ * Copyright 2007 Sebastian Siewior
+ *
+ * Contacts:
+ *	Sebastian Siewior <bigeasy@linutronix.de>
+ *	Laurent Pinchart <laurent.pinchart@ideasonboard.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * version 2 as published by the Free Software Foundation.
+ */
+
+#include <linux/gpio.h>
+#include <linux/io.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/usb.h>
+
+#include "isp1760-core.h"
+#include "isp1760-hcd.h"
+
+int isp1760_register(struct resource *mem, int irq, unsigned long irqflags,
+		     struct device *dev, unsigned int devflags)
+{
+	struct isp1760_device *isp;
+	int ret;
+
+	if (usb_disabled())
+		return -ENODEV;
+
+	/* prevent usb-core allocating DMA pages */
+	dev->dma_mask = NULL;
+
+	isp = devm_kzalloc(dev, sizeof(*isp), GFP_KERNEL);
+	if (!isp)
+		return -ENOMEM;
+
+	isp->regs = devm_ioremap_resource(dev, mem);
+	if (IS_ERR(isp->regs))
+		return PTR_ERR(isp->regs);
+
+	ret = isp1760_hcd_register(&isp->hcd, isp->regs, mem, irq, irqflags,
+				   dev, devflags);
+	if (ret < 0)
+		return ret;
+
+	dev_set_drvdata(dev, isp);
+
+	return 0;
+}
+
+void isp1760_unregister(struct device *dev)
+{
+	struct isp1760_device *isp = dev_get_drvdata(dev);
+
+	isp1760_hcd_unregister(&isp->hcd);
+}
+
+MODULE_DESCRIPTION("Driver for the ISP1760 USB-controller from NXP");
+MODULE_AUTHOR("Sebastian Siewior <bigeasy@linuxtronix.de>");
+MODULE_LICENSE("GPL v2");