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 * SPDX-License-Identifier: GPL-2.0 9 */ 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 22 enum buffer_map_state { 23 UN_MAPPED = 0, 24 PRE_MAPPED, 25 MUSB_MAPPED 26 }; 27 28 struct 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 38 static 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 43 extern struct usb_request * 44 musb_alloc_request(struct usb_ep *ep, gfp_t gfp_flags); 45 extern 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 */ 51 struct 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 77 static 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 82 static 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 91 extern void musb_g_tx(struct musb *musb, u8 epnum); 92 extern void musb_g_rx(struct musb *musb, u8 epnum); 93 94 extern const struct usb_ep_ops musb_g_ep0_ops; 95 96 extern int musb_gadget_setup(struct musb *); 97 extern void musb_gadget_cleanup(struct musb *); 98 99 extern void musb_g_giveback(struct musb_ep *, struct usb_request *, int); 100 101 extern void musb_ep_restart(struct musb *, struct musb_request *); 102 103 #ifdef __UBOOT__ 104 int musb_gadget_start(struct usb_gadget *g, struct usb_gadget_driver *driver); 105 #endif 106 #endif /* __MUSB_GADGET_H */ 107