drivers/usb/musb-new/musb_gadget.h

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