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musb_gadget.h
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1 /*
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  *
8  * This program is free software; you can redistribute it and/or
9  * modify it under the terms of the GNU General Public License
10  * version 2 as published by the Free Software Foundation.
11  *
12  * This program is distributed in the hope that it will be useful, but
13  * WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15  * General Public License for more details.
16  *
17  * You should have received a copy of the GNU General Public License
18  * along with this program; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
20  * 02110-1301 USA
21  *
22  * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
23  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
24  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
25  * NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT,
26  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
27  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
28  * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
29  * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
30  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
31  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32  *
33  */
34 
35 #ifndef __MUSB_GADGET_H
36 #define __MUSB_GADGET_H
37 
38 #include <linux/list.h>
39 
41  UN_MAPPED = 0,
44 };
45 
46 struct musb_request {
48  struct list_head list;
49  struct musb_ep *ep;
50  struct musb *musb;
51  u8 tx; /* endpoint direction */
54 };
55 
56 static inline struct musb_request *to_musb_request(struct usb_request *req)
57 {
58  return req ? container_of(req, struct musb_request, request) : NULL;
59 }
60 
61 extern struct usb_request *
62 musb_alloc_request(struct usb_ep *ep, gfp_t gfp_flags);
63 extern void musb_free_request(struct usb_ep *ep, struct usb_request *req);
64 
65 
66 /*
67  * struct musb_ep - peripheral side view of endpoint rx or tx side
68  */
69 struct musb_ep {
70  /* stuff towards the head is basically write-once. */
71  struct usb_ep end_point;
72  char name[12];
73  struct musb_hw_ep *hw_ep;
74  struct musb *musb;
76 
77  /* ... when enabled/disabled ... */
82  struct dma_channel *dma;
83 
84  /* later things are modified based on usage */
86 
88 
89  /* true if lock must be dropped but req_list may not be advanced */
91 
93 };
94 
95 static inline struct musb_ep *to_musb_ep(struct usb_ep *ep)
96 {
97  return ep ? container_of(ep, struct musb_ep, end_point) : NULL;
98 }
99 
100 static inline struct musb_request *next_request(struct musb_ep *ep)
101 {
102  struct list_head *queue = &ep->req_list;
103 
104  if (list_empty(queue))
105  return NULL;
106  return container_of(queue->next, struct musb_request, list);
107 }
108 
109 extern void musb_g_tx(struct musb *musb, u8 epnum);
110 extern void musb_g_rx(struct musb *musb, u8 epnum);
111 
112 extern const struct usb_ep_ops musb_g_ep0_ops;
113 
114 extern int musb_gadget_setup(struct musb *);
115 extern void musb_gadget_cleanup(struct musb *);
116 
117 extern void musb_g_giveback(struct musb_ep *, struct usb_request *, int);
118 
119 extern void musb_ep_restart(struct musb *, struct musb_request *);
120 
121 #endif /* __MUSB_GADGET_H */