102 lines
2.3 KiB
C
102 lines
2.3 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Copyright (C) 2017 MediaTek Inc.
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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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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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static inline struct musb_request *to_musb_request(struct usb_request *req)
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{
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return req ? container_of(req, struct musb_request, request) : NULL;
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}
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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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u16 fifo_size;
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enum musb_buf_mode fifo_mode;
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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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/* true if packet is received in fifo and req_list is empty */
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u8 rx_pending;
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};
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static inline struct musb_ep *to_musb_ep(struct usb_ep *ep)
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{
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return ep ? container_of(ep, struct musb_ep, end_point) : NULL;
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}
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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 void musb_g_tx(struct musb *musb, u8 epnum);
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extern void musb_g_rx(struct musb *musb, u8 epnum);
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extern const struct usb_ep_ops musb_g_ep0_ops;
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extern int musb_gadget_setup(struct musb *musb);
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extern void musb_gadget_cleanup(struct musb *musb);
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extern void
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musb_g_giveback(struct musb_ep *ep,
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struct usb_request *request,
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int status) __releases(ep->musb->lock) __acquires(ep->musb->lock);
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extern void
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musb_ep_restart(struct musb *musb, struct musb_request *req);
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#endif /* __MUSB_GADGET_H */
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