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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 #ifdef __UBOOT__
15 #include <asm/byteorder.h>
16 #include <linux/errno.h>
17 #include <linux/usb/ch9.h>
18 #include <linux/usb/gadget.h>
19 #endif
20 
21 enum buffer_map_state {
22 	UN_MAPPED = 0,
23 	PRE_MAPPED,
24 	MUSB_MAPPED
25 };
26 
27 struct musb_request {
28 	struct usb_request	request;
29 	struct list_head	list;
30 	struct musb_ep		*ep;
31 	struct musb		*musb;
32 	u8 tx;			/* endpoint direction */
33 	u8 epnum;
34 	enum buffer_map_state map_state;
35 };
36 
to_musb_request(struct usb_request * req)37 static inline struct musb_request *to_musb_request(struct usb_request *req)
38 {
39 	return req ? container_of(req, struct musb_request, request) : NULL;
40 }
41 
42 extern struct usb_request *
43 musb_alloc_request(struct usb_ep *ep, gfp_t gfp_flags);
44 extern void musb_free_request(struct usb_ep *ep, struct usb_request *req);
45 
46 
47 /*
48  * struct musb_ep - peripheral side view of endpoint rx or tx side
49  */
50 struct musb_ep {
51 	/* stuff towards the head is basically write-once. */
52 	struct usb_ep			end_point;
53 	char				name[12];
54 	struct musb_hw_ep		*hw_ep;
55 	struct musb			*musb;
56 	u8				current_epnum;
57 
58 	/* ... when enabled/disabled ... */
59 	u8				type;
60 	u8				is_in;
61 	u16				packet_sz;
62 	const struct usb_endpoint_descriptor	*desc;
63 	struct dma_channel		*dma;
64 
65 	/* later things are modified based on usage */
66 	struct list_head		req_list;
67 
68 	u8				wedged;
69 
70 	/* true if lock must be dropped but req_list may not be advanced */
71 	u8				busy;
72 
73 	u8				hb_mult;
74 };
75 
to_musb_ep(struct usb_ep * ep)76 static inline struct musb_ep *to_musb_ep(struct usb_ep *ep)
77 {
78 	return ep ? container_of(ep, struct musb_ep, end_point) : NULL;
79 }
80 
next_request(struct musb_ep * ep)81 static inline struct musb_request *next_request(struct musb_ep *ep)
82 {
83 	struct list_head	*queue = &ep->req_list;
84 
85 	if (list_empty(queue))
86 		return NULL;
87 	return container_of(queue->next, struct musb_request, list);
88 }
89 
90 extern void musb_g_tx(struct musb *musb, u8 epnum);
91 extern void musb_g_rx(struct musb *musb, u8 epnum);
92 
93 extern const struct usb_ep_ops musb_g_ep0_ops;
94 
95 extern int musb_gadget_setup(struct musb *);
96 extern void musb_gadget_cleanup(struct musb *);
97 
98 extern void musb_g_giveback(struct musb_ep *, struct usb_request *, int);
99 
100 extern void musb_ep_restart(struct musb *, struct musb_request *);
101 
102 #ifdef __UBOOT__
103 int musb_gadget_start(struct usb_gadget *g, struct usb_gadget_driver *driver);
104 #endif
105 #endif		/* __MUSB_GADGET_H */
106