usb: renesas_usbhs: Add Renesas USBHS Gadget

This patch add usb gadget code to SuperH USBHS.
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/usb/gadget/Kconfig

@@ -260,6 +260,24 @@ config USB_R8A66597
 	default USB_GADGET
 	select USB_GADGET_SELECTED
 
+config USB_GADGET_RENESAS_USBHS
+	boolean "Renesas USBHS"
+	depends on USB_RENESAS_USBHS
+	select USB_GADGET_DUALSPEED
+	help
+	   Renesas USBHS is a discrete USB host and peripheral controller
+	   chip that supports both full and high speed USB 2.0 data transfers.
+	   platform is able to configure endpoint (pipe) style
+
+	   Say "y" to enable the gadget specific portion of the USBHS driver.
+
+
+config USB_RENESAS_USBHS_UDC
+	tristate
+	depends on USB_GADGET_RENESAS_USBHS
+	default USB_GADGET
+	select USB_GADGET_SELECTED
+
 config USB_GADGET_PXA27X
 	boolean "PXA 27x"
 	depends on ARCH_PXA && (PXA27x || PXA3xx)

drivers/usb/gadget/gadget_chips.h

@@ -148,6 +148,12 @@
 #define gadget_is_ci13xxx_msm(g)	0
 #endif
 
+#ifdef CONFIG_USB_GADGET_RENESAS_USBHS
+#define	gadget_is_renesas_usbhs(g) (!strcmp("renesas_usbhs_udc", (g)->name))
+#else
+#define	gadget_is_renesas_usbhs(g) 0
+#endif
+
 /**
  * usb_gadget_controller_number - support bcdDevice id convention
  * @gadget: the controller being driven
@@ -207,6 +213,9 @@ static inline int usb_gadget_controller_number(struct usb_gadget *gadget)
 		return 0x27;
 	else if (gadget_is_ci13xxx_msm(gadget))
 		return 0x28;
+	else if (gadget_is_renesas_usbhs(gadget))
+		return 0x29;
+
 	return -ENOENT;
 }
 

drivers/usb/renesas_usbhs/Makefile

@@ -5,3 +5,5 @@
 obj-$(CONFIG_USB_RENESAS_USBHS)	+= renesas_usbhs.o
 
 renesas_usbhs-y			:= common.o mod.o pipe.o
+
+renesas_usbhs-$(CONFIG_USB_RENESAS_USBHS_UDC)	+= mod_gadget.o

drivers/usb/renesas_usbhs/mod.c

@@ -94,17 +94,32 @@ int usbhs_mod_probe(struct usbhs_priv *priv)
 	struct device *dev = usbhs_priv_to_dev(priv);
 	int ret;
 
+	/*
+	 * install host/gadget driver
+	 */
+	ret = usbhs_mod_gadget_probe(priv);
+	if (ret < 0)
+		return ret;
+
 	/* irq settings */
 	ret = request_irq(priv->irq, usbhs_interrupt,
 			  IRQF_DISABLED, dev_name(dev), priv);
-	if (ret)
+	if (ret) {
 		dev_err(dev, "irq request err\n");
+		goto mod_init_gadget_err;
+	}
+
+	return ret;
+
+mod_init_gadget_err:
+	usbhs_mod_gadget_remove(priv);
 
 	return ret;
 }
 
 void usbhs_mod_remove(struct usbhs_priv *priv)
 {
+	usbhs_mod_gadget_remove(priv);
 	free_irq(priv->irq, priv);
 }
 

drivers/usb/renesas_usbhs/mod.h

@@ -103,4 +103,20 @@ void usbhs_irq_callback_update(struct usbhs_priv *priv, struct usbhs_mod *mod);
 		 mod->func(param);			\
 	})
 
+/*
+ * gadget control
+ */
+#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);
+#else
+static inline int usbhs_mod_gadget_probe(struct usbhs_priv *priv)
+{
+	return 0;
+}
+static inline void usbhs_mod_gadget_remove(struct usbhs_priv *priv)
+{
+}
+#endif
+
 #endif /* RENESAS_USB_MOD_H */