USB: gadget: Fix endpoint representation in ci13xxx_udc

Fix a bug where only half the number of endpoints supported by the
hardware are exposed to gadget.  If DEN filed in the DCCPARAMS
register has 'N' then 'N' IN endpoints and 'N" OUT endpoints can be
supported.  But only 'N' bidirectional endpoints are added to the
gadget ep_list.  This patch also ensures that the data and handshake
transactions of previous setup packet are flushed upon a new setup
packet arrival on ep0.
Signed-off-by: Pavankumar Kondeti <pkondeti@codeaurora.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/usb/gadget/ci13xxx_udc.h

@@ -20,7 +20,7 @@
  * DEFINE
  *****************************************************************************/
 #define CI13XXX_PAGE_SIZE  4096ul /* page size for TD's */
-#define ENDPT_MAX          (16)
+#define ENDPT_MAX          (32)
 #define CTRL_PAYLOAD_MAX   (64)
 #define RX        (0)  /* similar to USB_DIR_OUT but can be used as an index */
 #define TX        (1)  /* similar to USB_DIR_IN  but can be used as an index */
@@ -88,8 +88,7 @@ struct ci13xxx_ep {
 		struct list_head   queue;
 		struct ci13xxx_qh *ptr;
 		dma_addr_t         dma;
-	}                                      qh[2];
-	struct usb_request                    *status;
+	}                                      qh;
 	int                                    wedge;
 
 	/* global resources */
@@ -119,9 +118,13 @@ struct ci13xxx {
 
 	struct dma_pool           *qh_pool;   /* DMA pool for queue heads */
 	struct dma_pool           *td_pool;   /* DMA pool for transfer descs */
+	struct usb_request        *status;    /* ep0 status request */
 
 	struct usb_gadget          gadget;     /* USB slave device */
 	struct ci13xxx_ep          ci13xxx_ep[ENDPT_MAX]; /* extended endpts */
+	u32                        ep0_dir;    /* ep0 direction */
+#define ep0out ci13xxx_ep[0]
+#define ep0in  ci13xxx_ep[16]
 
 	struct usb_gadget_driver  *driver;     /* 3rd party gadget driver */
 	struct ci13xxx_udc_driver *udc_driver; /* device controller driver */