cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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musb_gadget.h (3086B)

      1/* SPDX-License-Identifier: GPL-2.0 */
      2/*
      3 * MUSB OTG driver peripheral defines
      4 *
      5 * Copyright 2005 Mentor Graphics Corporation
      6 * Copyright (C) 2005-2006 by Texas Instruments
      7 * Copyright (C) 2006-2007 Nokia Corporation
      8 */
      9
     10#ifndef __MUSB_GADGET_H
     11#define __MUSB_GADGET_H
     12
     13#include <linux/list.h>
     14
     15#if IS_ENABLED(CONFIG_USB_MUSB_GADGET) || IS_ENABLED(CONFIG_USB_MUSB_DUAL_ROLE)
     16extern irqreturn_t musb_g_ep0_irq(struct musb *);
     17extern void musb_g_tx(struct musb *, u8);
     18extern void musb_g_rx(struct musb *, u8);
     19extern void musb_g_reset(struct musb *);
     20extern void musb_g_suspend(struct musb *);
     21extern void musb_g_resume(struct musb *);
     22extern void musb_g_wakeup(struct musb *);
     23extern void musb_g_disconnect(struct musb *);
     24extern void musb_gadget_cleanup(struct musb *);
     25extern int musb_gadget_setup(struct musb *);
     26
     27#else
     28static inline irqreturn_t musb_g_ep0_irq(struct musb *musb)
     29{
     30	return 0;
     31}
     32
     33static inline void musb_g_tx(struct musb *musb, u8 epnum)	{}
     34static inline void musb_g_rx(struct musb *musb, u8 epnum)	{}
     35static inline void musb_g_reset(struct musb *musb)		{}
     36static inline void musb_g_suspend(struct musb *musb)		{}
     37static inline void musb_g_resume(struct musb *musb)		{}
     38static inline void musb_g_wakeup(struct musb *musb)		{}
     39static inline void musb_g_disconnect(struct musb *musb)		{}
     40static inline void musb_gadget_cleanup(struct musb *musb)	{}
     41static inline int musb_gadget_setup(struct musb *musb)
     42{
     43	return 0;
     44}
     45#endif
     46
     47enum buffer_map_state {
     48	UN_MAPPED = 0,
     49	PRE_MAPPED,
     50	MUSB_MAPPED
     51};
     52
     53struct musb_request {
     54	struct usb_request	request;
     55	struct list_head	list;
     56	struct musb_ep		*ep;
     57	struct musb		*musb;
     58	u8 tx;			/* endpoint direction */
     59	u8 epnum;
     60	enum buffer_map_state map_state;
     61};
     62
     63#define to_musb_request(r)	container_of((r), struct musb_request, request)
     64
     65extern struct usb_request *
     66musb_alloc_request(struct usb_ep *ep, gfp_t gfp_flags);
     67extern void musb_free_request(struct usb_ep *ep, struct usb_request *req);
     68
     69
     70/*
     71 * struct musb_ep - peripheral side view of endpoint rx or tx side
     72 */
     73struct musb_ep {
     74	/* stuff towards the head is basically write-once. */
     75	struct usb_ep			end_point;
     76	char				name[12];
     77	struct musb_hw_ep		*hw_ep;
     78	struct musb			*musb;
     79	u8				current_epnum;
     80
     81	/* ... when enabled/disabled ... */
     82	u8				type;
     83	u8				is_in;
     84	u16				packet_sz;
     85	const struct usb_endpoint_descriptor	*desc;
     86	struct dma_channel		*dma;
     87
     88	/* later things are modified based on usage */
     89	struct list_head		req_list;
     90
     91	u8				wedged;
     92
     93	/* true if lock must be dropped but req_list may not be advanced */
     94	u8				busy;
     95
     96	u8				hb_mult;
     97};
     98
     99#define to_musb_ep(ep)	container_of((ep), struct musb_ep, end_point)
    100
    101static inline struct musb_request *next_request(struct musb_ep *ep)
    102{
    103	struct list_head	*queue = &ep->req_list;
    104
    105	if (list_empty(queue))
    106		return NULL;
    107	return container_of(queue->next, struct musb_request, list);
    108}
    109
    110extern const struct usb_ep_ops musb_g_ep0_ops;
    111
    112extern void musb_g_giveback(struct musb_ep *, struct usb_request *, int);
    113
    114extern void musb_ep_restart(struct musb *, struct musb_request *);
    115
    116#endif		/* __MUSB_GADGET_H */