usb: add support of generic OHCI devices

This driver is meant to be used with any OHCI-compatible host
controller in case if there's no need for platform-specific
glue such as setup of controller or PHY's power mode via
GPIOs etc.

Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
Cc: Simon Glass <sjg@chromium.org>
Cc: Marek Vasut <marex@denx.de>

drivers/usb/host/Kconfig

@@ -26,6 +26,14 @@ config USB_XHCI_UNIPHIER
 
 endif
 
+config USB_OHCI_GENERIC
+	bool "Support for generic OHCI USB controller"
+	depends on OF_CONTROL
+	depends on DM_USB
+	default n
+	---help---
+	  Enables support for generic OHCI controller.
+
 config USB_EHCI_HCD
 	bool "EHCI HCD (USB 2.0) support"
 	---help---

drivers/usb/host/Makefile

@@ -21,6 +21,7 @@ obj-$(CONFIG_USB_OHCI_S3C24XX) += ohci-s3c24xx.o
 obj-$(CONFIG_USB_OHCI_EP93XX) += ohci-ep93xx.o
 obj-$(CONFIG_USB_OHCI_SUNXI) += ohci-sunxi.o
 obj-$(CONFIG_USB_OHCI_LPC32XX) += ohci-lpc32xx.o
+obj-$(CONFIG_USB_OHCI_GENERIC) += ohci-generic.o
 
 # echi
 obj-$(CONFIG_USB_EHCI) += ehci-hcd.o

drivers/usb/host/ohci-generic.c

@@ -0,0 +1,45 @@
+/*
+ * Copyright (C) 2015 Alexey Brodkin <abrodkin@synopsys.com>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <dm.h>
+#include "ohci.h"
+
+#if !defined(CONFIG_USB_OHCI_NEW)
+# error "Generic OHCI driver requires CONFIG_USB_OHCI_NEW"
+#endif
+
+struct generic_ohci {
+	ohci_t ohci;
+};
+
+static int ohci_usb_probe(struct udevice *dev)
+{
+	struct ohci_regs *regs = (struct ohci_regs *)dev_get_addr(dev);
+
+	return ohci_register(dev, regs);
+}
+
+static int ohci_usb_remove(struct udevice *dev)
+{
+	return ohci_deregister(dev);
+}
+
+static const struct udevice_id ohci_usb_ids[] = {
+	{ .compatible = "generic-ohci" },
+	{ }
+};
+
+U_BOOT_DRIVER(ohci_generic) = {
+	.name	= "ohci_generic",
+	.id	= UCLASS_USB,
+	.of_match = ohci_usb_ids,
+	.probe = ohci_usb_probe,
+	.remove = ohci_usb_remove,
+	.ops	= &ohci_usb_ops,
+	.priv_auto_alloc_size = sizeof(struct generic_ohci),
+	.flags	= DM_FLAG_ALLOC_PRIV_DMA,
+};