text: /* SPDX-License-Identifier: GPL-2.0 */
  /*
   * MUSB OTG driver peripheral defines
   *
   * Copyright 2005 Mentor Graphics Corporation
   * Copyright (C) 2005-2006 by Texas Instruments
   * Copyright (C) 2006-2007 Nokia Corporation
   */
  
  #ifndef __MUSB_GADGET_H
  #define __MUSB_GADGET_H
  
  #include <linux/list.h>
  #ifdef __UBOOT__
  #include <asm/byteorder.h>
  #include <linux/errno.h>
  #include <linux/usb/ch9.h>
  #include <linux/usb/gadget.h>
  #endif
  
  enum buffer_map_state {
  	UN_MAPPED = 0,
  	PRE_MAPPED,
  	MUSB_MAPPED
  };
  
  struct musb_request {
  	struct usb_request	request;
  	struct list_head	list;
  	struct musb_ep		*ep;
  	struct musb		*musb;
  	u8 tx;			/* endpoint direction */
  	u8 epnum;
  	enum buffer_map_state map_state;
  };
  
  static inline struct musb_request *to_musb_request(struct usb_request *req)
  {
  	return req ? container_of(req, struct musb_request, request) : NULL;
  }
  
  extern struct usb_request *
  musb_alloc_request(struct usb_ep *ep, gfp_t gfp_flags);
  extern void musb_free_request(struct usb_ep *ep, struct usb_request *req);
  
  
  /*
   * struct musb_ep - peripheral side view of endpoint rx or tx side
   */
  struct musb_ep {
  	/* stuff towards the head is basically write-once. */
  	struct usb_ep			end_point;
  	char				name[12];
  	struct musb_hw_ep		*hw_ep;
  	struct musb			*musb;
  	u8				current_epnum;
  
  	/* ... when enabled/disabled ... */
  	u8				type;
  	u8				is_in;
  	u16				packet_sz;
  	const struct usb_endpoint_descriptor	*desc;
  	struct dma_channel		*dma;
  
  	/* later things are modified based on usage */
  	struct list_head		req_list;
  
  	u8				wedged;
  
  	/* true if lock must be dropped but req_list may not be advanced */
  	u8				busy;
  
  	u8				hb_mult;
  };
  
  static inline struct musb_ep *to_musb_ep(struct usb_ep *ep)
  {
  	return ep ? container_of(ep, struct musb_ep, end_point) : NULL;
  }
  
  static inline struct musb_request *next_request(struct musb_ep *ep)
  {
  	struct list_head	*queue = &ep->req_list;
  
  	if (list_empty(queue))
  		return NULL;
  	return container_of(queue->next, struct musb_request, list);
  }
  
  extern void musb_g_tx(struct musb *musb, u8 epnum);
  extern void musb_g_rx(struct musb *musb, u8 epnum);
  
  extern const struct usb_ep_ops musb_g_ep0_ops;
  
  extern int musb_gadget_setup(struct musb *);
  extern void musb_gadget_cleanup(struct musb *);
  
  extern void musb_g_giveback(struct musb_ep *, struct usb_request *, int);
  
  extern void musb_ep_restart(struct musb *, struct musb_request *);
  
  #ifdef __UBOOT__
  int musb_gadget_start(struct usb_gadget *g, struct usb_gadget_driver *driver);
  #endif
  #endif		/* __MUSB_GADGET_H */
  