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Ilya Yanokeb819552012-11-06 13:48:21 +00001/*
2 * MUSB OTG driver peripheral defines
3 *
4 * Copyright 2005 Mentor Graphics Corporation
5 * Copyright (C) 2005-2006 by Texas Instruments
6 * Copyright (C) 2006-2007 Nokia Corporation
7 *
Tom Rini5b8031c2016-01-14 22:05:13 -05008 * SPDX-License-Identifier: GPL-2.0
Ilya Yanokeb819552012-11-06 13:48:21 +00009 */
10
11#ifndef __MUSB_GADGET_H
12#define __MUSB_GADGET_H
13
14#include <linux/list.h>
15#ifdef __UBOOT__
16#include <asm/byteorder.h>
17#include <asm/errno.h>
18#include <linux/usb/ch9.h>
19#include <linux/usb/gadget.h>
20#endif
21
22enum buffer_map_state {
23 UN_MAPPED = 0,
24 PRE_MAPPED,
25 MUSB_MAPPED
26};
27
28struct musb_request {
29 struct usb_request request;
30 struct list_head list;
31 struct musb_ep *ep;
32 struct musb *musb;
33 u8 tx; /* endpoint direction */
34 u8 epnum;
35 enum buffer_map_state map_state;
36};
37
38static inline struct musb_request *to_musb_request(struct usb_request *req)
39{
40 return req ? container_of(req, struct musb_request, request) : NULL;
41}
42
43extern struct usb_request *
44musb_alloc_request(struct usb_ep *ep, gfp_t gfp_flags);
45extern void musb_free_request(struct usb_ep *ep, struct usb_request *req);
46
47
48/*
49 * struct musb_ep - peripheral side view of endpoint rx or tx side
50 */
51struct musb_ep {
52 /* stuff towards the head is basically write-once. */
53 struct usb_ep end_point;
54 char name[12];
55 struct musb_hw_ep *hw_ep;
56 struct musb *musb;
57 u8 current_epnum;
58
59 /* ... when enabled/disabled ... */
60 u8 type;
61 u8 is_in;
62 u16 packet_sz;
63 const struct usb_endpoint_descriptor *desc;
64 struct dma_channel *dma;
65
66 /* later things are modified based on usage */
67 struct list_head req_list;
68
69 u8 wedged;
70
71 /* true if lock must be dropped but req_list may not be advanced */
72 u8 busy;
73
74 u8 hb_mult;
75};
76
77static inline struct musb_ep *to_musb_ep(struct usb_ep *ep)
78{
79 return ep ? container_of(ep, struct musb_ep, end_point) : NULL;
80}
81
82static inline struct musb_request *next_request(struct musb_ep *ep)
83{
84 struct list_head *queue = &ep->req_list;
85
86 if (list_empty(queue))
87 return NULL;
88 return container_of(queue->next, struct musb_request, list);
89}
90
91extern void musb_g_tx(struct musb *musb, u8 epnum);
92extern void musb_g_rx(struct musb *musb, u8 epnum);
93
94extern const struct usb_ep_ops musb_g_ep0_ops;
95
96extern int musb_gadget_setup(struct musb *);
97extern void musb_gadget_cleanup(struct musb *);
98
99extern void musb_g_giveback(struct musb_ep *, struct usb_request *, int);
100
101extern void musb_ep_restart(struct musb *, struct musb_request *);
102
103#ifdef __UBOOT__
104int musb_gadget_start(struct usb_gadget *g, struct usb_gadget_driver *driver);
105#endif
106#endif /* __MUSB_GADGET_H */