usb: gadget: renesas_usbhs: add mod_host support

This is mod_host prototype support for renesas_usbhs driver.
It doesn't support USB-Hub, and USB-DMAC for now.
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>

drivers/usb/host/Kconfig

@@ -515,6 +515,19 @@ config USB_R8A66597_HCD
 	  To compile this driver as a module, choose M here: the
 	  module will be called r8a66597-hcd.
 
+config USB_RENESAS_USBHS_HCD
+	tristate "Renesas USBHS HCD support"
+	depends on USB
+	depends on USB_RENESAS_USBHS
+	help
+	  The Renesas USBHS is a USB 2.0 host and peripheral controller.
+
+	  Enable this option if your board has this chip, and you want
+	  to use it as a host controller.  If unsure, say N.
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called renesas-usbhs.
+
 config USB_WHCI_HCD
 	tristate "Wireless USB Host Controller Interface (WHCI) driver (EXPERIMENTAL)"
 	depends on EXPERIMENTAL

drivers/usb/renesas_usbhs/Makefile

@@ -6,4 +6,5 @@ obj-$(CONFIG_USB_RENESAS_USBHS)	+= renesas_usbhs.o
 
 renesas_usbhs-y			:= common.o mod.o pipe.o fifo.o
 
+renesas_usbhs-$(CONFIG_USB_RENESAS_USBHS_HCD)	+= mod_host.o
 renesas_usbhs-$(CONFIG_USB_RENESAS_USBHS_UDC)	+= mod_gadget.o

drivers/usb/renesas_usbhs/mod.c

@@ -140,10 +140,14 @@ int usbhs_mod_probe(struct usbhs_priv *priv)
 	/*
 	 * install host/gadget driver
 	 */
-	ret = usbhs_mod_gadget_probe(priv);
+	ret = usbhs_mod_host_probe(priv);
 	if (ret < 0)
 		return ret;
 
+	ret = usbhs_mod_gadget_probe(priv);
+	if (ret < 0)
+		goto mod_init_host_err;
+
 	/* irq settings */
 	ret = request_irq(priv->irq, usbhs_interrupt,
 			  0, dev_name(dev), priv);
@@ -156,12 +160,15 @@ int usbhs_mod_probe(struct usbhs_priv *priv)
 
 mod_init_gadget_err:
 	usbhs_mod_gadget_remove(priv);
+mod_init_host_err:
+	usbhs_mod_host_remove(priv);
 
 	return ret;
 }
 
 void usbhs_mod_remove(struct usbhs_priv *priv)
 {
+	usbhs_mod_host_remove(priv);
 	usbhs_mod_gadget_remove(priv);
 	free_irq(priv->irq, priv);
 }

drivers/usb/renesas_usbhs/mod.h

@@ -139,8 +139,21 @@ void usbhs_irq_callback_update(struct usbhs_priv *priv, struct usbhs_mod *mod);
 	})
 
 /*
- * gadget control
+ * host / gadget control
  */
+#ifdef CONFIG_USB_RENESAS_USBHS_HCD
+extern int __devinit usbhs_mod_host_probe(struct usbhs_priv *priv);
+extern int __devexit usbhs_mod_host_remove(struct usbhs_priv *priv);
+#else
+static inline int usbhs_mod_host_probe(struct usbhs_priv *priv)
+{
+	return 0;
+}
+static inline void usbhs_mod_host_remove(struct usbhs_priv *priv)
+{
+}
+#endif
+
 #ifdef CONFIG_USB_RENESAS_USBHS_UDC
 extern int __devinit usbhs_mod_gadget_probe(struct usbhs_priv *priv);
 extern void __devexit usbhs_mod_gadget_remove(struct usbhs_priv *priv);