musb_gadget.h
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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>
#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 */