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/* 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>
extern irqreturn_t musb_g_ep0_irq(struct musb *);
extern void musb_g_tx(struct musb *, u8);
extern void musb_g_rx(struct musb *, u8);
extern void musb_g_reset(struct musb *);
extern void musb_g_suspend(struct musb *);
extern void musb_g_resume(struct musb *);
extern void musb_g_wakeup(struct musb *);
extern void musb_g_disconnect(struct musb *);
extern void musb_gadget_cleanup(struct musb *);
extern int musb_gadget_setup(struct musb *);
static inline irqreturn_t musb_g_ep0_irq(struct musb *musb)
return 0;
static inline void musb_g_tx(struct musb *musb, u8 epnum) {}
static inline void musb_g_rx(struct musb *musb, u8 epnum) {}
static inline void musb_g_reset(struct musb *musb) {}
static inline void musb_g_suspend(struct musb *musb) {}
static inline void musb_g_resume(struct musb *musb) {}
static inline void musb_g_wakeup(struct musb *musb) {}
static inline void musb_g_disconnect(struct musb *musb) {}
static inline void musb_gadget_cleanup(struct musb *musb) {}
static inline int musb_gadget_setup(struct musb *musb)
return 0;
enum buffer_map_state {
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;
#define to_musb_request(r) container_of((r), struct musb_request, request)
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;
#define to_musb_ep(ep) container_of((ep), struct musb_ep, end_point)
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 const struct usb_ep_ops musb_g_ep0_ops;
extern void musb_g_giveback(struct musb_ep *, struct usb_request *, int);
extern void musb_ep_restart(struct musb *, struct musb_request *);
#endif /* __MUSB_GADGET_H */