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 15 #if IS_ENABLED(CONFIG_USB_MUSB_GADGET) || IS_ENABLED(CONFIG_USB_MUSB_DUAL_ROLE) 16 extern irqreturn_t musb_g_ep0_irq(struct musb *); 17 extern void musb_g_tx(struct musb *, u8); 18 extern void musb_g_rx(struct musb *, u8); 19 extern void musb_g_reset(struct musb *); 20 extern void musb_g_suspend(struct musb *); 21 extern void musb_g_resume(struct musb *); 22 extern void musb_g_wakeup(struct musb *); 23 extern void musb_g_disconnect(struct musb *); 24 extern void musb_gadget_cleanup(struct musb *); 25 extern int musb_gadget_setup(struct musb *); 26 27 #else 28 static inline irqreturn_t musb_g_ep0_irq(struct musb *musb) 29 { 30 return 0; 31 } 32 33 static inline void musb_g_tx(struct musb *musb, u8 epnum) {} 34 static inline void musb_g_rx(struct musb *musb, u8 epnum) {} 35 static inline void musb_g_reset(struct musb *musb) {} 36 static inline void musb_g_suspend(struct musb *musb) {} 37 static inline void musb_g_resume(struct musb *musb) {} 38 static inline void musb_g_wakeup(struct musb *musb) {} 39 static inline void musb_g_disconnect(struct musb *musb) {} 40 static inline void musb_gadget_cleanup(struct musb *musb) {} 41 static inline int musb_gadget_setup(struct musb *musb) 42 { 43 return 0; 44 } 45 #endif 46 47 enum buffer_map_state { 48 UN_MAPPED = 0, 49 PRE_MAPPED, 50 MUSB_MAPPED 51 }; 52 53 struct musb_request { 54 struct usb_request request; 55 struct list_head list; 56 struct musb_ep *ep; 57 struct musb *musb; 58 u8 tx; /* endpoint direction */ 59 u8 epnum; 60 enum buffer_map_state map_state; 61 }; 62 63 #define to_musb_request(r) container_of((r), struct musb_request, request) 64 65 extern struct usb_request * 66 musb_alloc_request(struct usb_ep *ep, gfp_t gfp_flags); 67 extern void musb_free_request(struct usb_ep *ep, struct usb_request *req); 68 69 70 /* 71 * struct musb_ep - peripheral side view of endpoint rx or tx side 72 */ 73 struct musb_ep { 74 /* stuff towards the head is basically write-once. */ 75 struct usb_ep end_point; 76 char name[12]; 77 struct musb_hw_ep *hw_ep; 78 struct musb *musb; 79 u8 current_epnum; 80 81 /* ... when enabled/disabled ... */ 82 u8 type; 83 u8 is_in; 84 u16 packet_sz; 85 const struct usb_endpoint_descriptor *desc; 86 struct dma_channel *dma; 87 88 /* later things are modified based on usage */ 89 struct list_head req_list; 90 91 u8 wedged; 92 93 /* true if lock must be dropped but req_list may not be advanced */ 94 u8 busy; 95 96 u8 hb_mult; 97 }; 98 99 #define to_musb_ep(ep) container_of((ep), struct musb_ep, end_point) 100 101 static inline struct musb_request *next_request(struct musb_ep *ep) 102 { 103 struct list_head *queue = &ep->req_list; 104 105 if (list_empty(queue)) 106 return NULL; 107 return container_of(queue->next, struct musb_request, list); 108 } 109 110 extern const struct usb_ep_ops musb_g_ep0_ops; 111 112 extern void musb_g_giveback(struct musb_ep *, struct usb_request *, int); 113 114 extern void musb_ep_restart(struct musb *, struct musb_request *); 115 116 #endif /* __MUSB_GADGET_H */ 117