LXR uboot/drivers/usb/musb-new/musb

   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#ifdef __UBOOT__
  15#include <asm/byteorder.h>
  16#include <linux/errno.h>
  17#include <linux/usb/ch9.h>
  18#include <linux/usb/gadget.h>
  19#endif
  20
  21enum buffer_map_state {
  22        UN_MAPPED = 0,
  23        PRE_MAPPED,
  24        MUSB_MAPPED
  25};
  26
  27struct musb_request {
  28        struct usb_request      request;
  29        struct list_head        list;
  30        struct musb_ep          *ep;
  31        struct musb             *musb;
  32        u8 tx;                  /* endpoint direction */
  33        u8 epnum;
  34        enum buffer_map_state map_state;
  35};
  36
  37static inline struct musb_request *to_musb_request(struct usb_request *req)
  38{
  39        return req ? container_of(req, struct musb_request, request) : NULL;
  40}
  41
  42extern struct usb_request *
  43musb_alloc_request(struct usb_ep *ep, gfp_t gfp_flags);
  44extern void musb_free_request(struct usb_ep *ep, struct usb_request *req);
  45
  46
  47/*
  48 * struct musb_ep - peripheral side view of endpoint rx or tx side
  49 */
  50struct musb_ep {
  51        /* stuff towards the head is basically write-once. */
  52        struct usb_ep                   end_point;
  53        char                            name[12];
  54        struct musb_hw_ep               *hw_ep;
  55        struct musb                     *musb;
  56        u8                              current_epnum;
  57
  58        /* ... when enabled/disabled ... */
  59        u8                              type;
  60        u8                              is_in;
  61        u16                             packet_sz;
  62        const struct usb_endpoint_descriptor    *desc;
  63        struct dma_channel              *dma;
  64
  65        /* later things are modified based on usage */
  66        struct list_head                req_list;
  67
  68        u8                              wedged;
  69
  70        /* true if lock must be dropped but req_list may not be advanced */
  71        u8                              busy;
  72
  73        u8                              hb_mult;
  74};
  75
  76static inline struct musb_ep *to_musb_ep(struct usb_ep *ep)
  77{
  78        return ep ? container_of(ep, struct musb_ep, end_point) : NULL;
  79}
  80
  81static inline struct musb_request *next_request(struct musb_ep *ep)
  82{
  83        struct list_head        *queue = &ep->req_list;
  84
  85        if (list_empty(queue))
  86                return NULL;
  87        return container_of(queue->next, struct musb_request, list);
  88}
  89
  90extern void musb_g_tx(struct musb *musb, u8 epnum);
  91extern void musb_g_rx(struct musb *musb, u8 epnum);
  92
  93extern const struct usb_ep_ops musb_g_ep0_ops;
  94
  95extern int musb_gadget_setup(struct musb *);
  96extern void musb_gadget_cleanup(struct musb *);
  97
  98extern void musb_g_giveback(struct musb_ep *, struct usb_request *, int);
  99
 100extern void musb_ep_restart(struct musb *, struct musb_request *);
 101
 102#ifdef __UBOOT__
 103int musb_gadget_start(struct usb_gadget *g, struct usb_gadget_driver *driver);
 104#endif
 105#endif          /* __MUSB_GADGET_H */
 106