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 struct musb_request { 39 struct usb_request request; 40 struct musb_ep *ep; 41 struct musb *musb; 42 u8 tx; /* endpoint direction */ 43 u8 epnum; 44 u8 mapped; 45 }; 46 47 static inline struct musb_request *to_musb_request(struct usb_request *req) 48 { 49 return req ? container_of(req, struct musb_request, request) : NULL; 50 } 51 52 extern struct usb_request * 53 musb_alloc_request(struct usb_ep *ep, gfp_t gfp_flags); 54 extern void musb_free_request(struct usb_ep *ep, struct usb_request *req); 55 56 57 /* 58 * struct musb_ep - peripheral side view of endpoint rx or tx side 59 */ 60 struct musb_ep { 61 /* stuff towards the head is basically write-once. */ 62 struct usb_ep end_point; 63 char name[12]; 64 struct musb_hw_ep *hw_ep; 65 struct musb *musb; 66 u8 current_epnum; 67 68 /* ... when enabled/disabled ... */ 69 u8 type; 70 u8 is_in; 71 u16 packet_sz; 72 const struct usb_endpoint_descriptor *desc; 73 struct dma_channel *dma; 74 75 /* later things are modified based on usage */ 76 struct list_head req_list; 77 78 u8 wedged; 79 80 /* true if lock must be dropped but req_list may not be advanced */ 81 u8 busy; 82 83 u8 hb_mult; 84 }; 85 86 static inline struct musb_ep *to_musb_ep(struct usb_ep *ep) 87 { 88 return ep ? container_of(ep, struct musb_ep, end_point) : NULL; 89 } 90 91 static inline struct usb_request *next_request(struct musb_ep *ep) 92 { 93 struct list_head *queue = &ep->req_list; 94 95 if (list_empty(queue)) 96 return NULL; 97 return container_of(queue->next, struct usb_request, list); 98 } 99 100 extern void musb_g_tx(struct musb *musb, u8 epnum); 101 extern void musb_g_rx(struct musb *musb, u8 epnum); 102 103 extern const struct usb_ep_ops musb_g_ep0_ops; 104 105 extern int musb_gadget_setup(struct musb *); 106 extern void musb_gadget_cleanup(struct musb *); 107 108 extern void musb_g_giveback(struct musb_ep *, struct usb_request *, int); 109 110 extern void musb_ep_restart(struct musb *, struct musb_request *); 111 112 #endif /* __MUSB_GADGET_H */ 113