/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* MUSB OTG driver peripheral defines
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*
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* Copyright 2005 Mentor Graphics Corporation
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* Copyright (C) 2005-2006 by Texas Instruments
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* Copyright (C) 2006-2007 Nokia Corporation
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*/
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#ifndef __MUSB_GADGET_H
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#define __MUSB_GADGET_H
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#include <linux/list.h>
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#if IS_ENABLED(CONFIG_USB_MUSB_GADGET) || IS_ENABLED(CONFIG_USB_MUSB_DUAL_ROLE)
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extern irqreturn_t musb_g_ep0_irq(struct musb *);
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extern void musb_g_tx(struct musb *, u8);
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extern void musb_g_rx(struct musb *, u8);
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extern void musb_g_reset(struct musb *);
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extern void musb_g_suspend(struct musb *);
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extern void musb_g_resume(struct musb *);
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extern void musb_g_wakeup(struct musb *);
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extern void musb_g_disconnect(struct musb *);
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extern void musb_gadget_cleanup(struct musb *);
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extern int musb_gadget_setup(struct musb *);
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#else
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static inline irqreturn_t musb_g_ep0_irq(struct musb *musb)
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{
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return 0;
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}
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static inline void musb_g_tx(struct musb *musb, u8 epnum) {}
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static inline void musb_g_rx(struct musb *musb, u8 epnum) {}
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static inline void musb_g_reset(struct musb *musb) {}
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static inline void musb_g_suspend(struct musb *musb) {}
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static inline void musb_g_resume(struct musb *musb) {}
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static inline void musb_g_wakeup(struct musb *musb) {}
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static inline void musb_g_disconnect(struct musb *musb) {}
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static inline void musb_gadget_cleanup(struct musb *musb) {}
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static inline int musb_gadget_setup(struct musb *musb)
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{
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return 0;
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}
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#endif
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enum buffer_map_state {
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UN_MAPPED = 0,
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PRE_MAPPED,
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MUSB_MAPPED
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};
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struct musb_request {
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struct usb_request request;
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struct list_head list;
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struct musb_ep *ep;
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struct musb *musb;
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u8 tx; /* endpoint direction */
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u8 epnum;
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enum buffer_map_state map_state;
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};
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#define to_musb_request(r) container_of((r), struct musb_request, request)
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extern struct usb_request *
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musb_alloc_request(struct usb_ep *ep, gfp_t gfp_flags);
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extern void musb_free_request(struct usb_ep *ep, struct usb_request *req);
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/*
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* struct musb_ep - peripheral side view of endpoint rx or tx side
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*/
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struct musb_ep {
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/* stuff towards the head is basically write-once. */
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struct usb_ep end_point;
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char name[12];
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struct musb_hw_ep *hw_ep;
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struct musb *musb;
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u8 current_epnum;
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/* ... when enabled/disabled ... */
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u8 type;
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u8 is_in;
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u16 packet_sz;
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const struct usb_endpoint_descriptor *desc;
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struct dma_channel *dma;
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/* later things are modified based on usage */
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struct list_head req_list;
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u8 wedged;
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/* true if lock must be dropped but req_list may not be advanced */
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u8 busy;
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u8 hb_mult;
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};
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#define to_musb_ep(ep) container_of((ep), struct musb_ep, end_point)
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static inline struct musb_request *next_request(struct musb_ep *ep)
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{
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struct list_head *queue = &ep->req_list;
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if (list_empty(queue))
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return NULL;
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return container_of(queue->next, struct musb_request, list);
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}
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extern const struct usb_ep_ops musb_g_ep0_ops;
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extern void musb_g_giveback(struct musb_ep *, struct usb_request *, int);
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extern void musb_ep_restart(struct musb *, struct musb_request *);
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#endif /* __MUSB_GADGET_H */
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