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

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