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 * This program is free software; you can redistribute it and/or
   9 * modify it under the terms of the GNU General Public License
  10 * version 2 as published by the Free Software Foundation.
  11 *
  12 * This program is distributed in the hope that it will be useful, but
  13 * WITHOUT ANY WARRANTY; without even the implied warranty of
  14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15 * General Public License for more details.
  16 *
  17 * You should have received a copy of the GNU General Public License
  18 * along with this program; if not, write to the Free Software
  19 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
  20 * 02110-1301 USA
  21 *
  22 * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
  23 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  24 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN
  25 * NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT,
  26 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  27 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
  28 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
  29 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  30 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  31 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  32 *
  33 */
  34
  35#ifndef __MUSB_GADGET_H
  36#define __MUSB_GADGET_H
  37
  38#include <linux/list.h>
  39#ifdef __UBOOT__
  40#include <asm/byteorder.h>
  41#include <asm/errno.h>
  42#include <linux/usb/ch9.h>
  43#include <linux/usb/gadget.h>
  44#endif
  45
  46enum buffer_map_state {
  47        UN_MAPPED = 0,
  48        PRE_MAPPED,
  49        MUSB_MAPPED
  50};
  51
  52struct musb_request {
  53        struct usb_request      request;
  54        struct list_head        list;
  55        struct musb_ep          *ep;
  56        struct musb             *musb;
  57        u8 tx;                  /* endpoint direction */
  58        u8 epnum;
  59        enum buffer_map_state map_state;
  60};
  61
  62static inline struct musb_request *to_musb_request(struct usb_request *req)
  63{
  64        return req ? container_of(req, struct musb_request, request) : NULL;
  65}
  66
  67extern struct usb_request *
  68musb_alloc_request(struct usb_ep *ep, gfp_t gfp_flags);
  69extern void musb_free_request(struct usb_ep *ep, struct usb_request *req);
  70
  71
  72/*
  73 * struct musb_ep - peripheral side view of endpoint rx or tx side
  74 */
  75struct musb_ep {
  76        /* stuff towards the head is basically write-once. */
  77        struct usb_ep                   end_point;
  78        char                            name[12];
  79        struct musb_hw_ep               *hw_ep;
  80        struct musb                     *musb;
  81        u8                              current_epnum;
  82
  83        /* ... when enabled/disabled ... */
  84        u8                              type;
  85        u8                              is_in;
  86        u16                             packet_sz;
  87        const struct usb_endpoint_descriptor    *desc;
  88        struct dma_channel              *dma;
  89
  90        /* later things are modified based on usage */
  91        struct list_head                req_list;
  92
  93        u8                              wedged;
  94
  95        /* true if lock must be dropped but req_list may not be advanced */
  96        u8                              busy;
  97
  98        u8                              hb_mult;
  99};
 100
 101static inline struct musb_ep *to_musb_ep(struct usb_ep *ep)
 102{
 103        return ep ? container_of(ep, struct musb_ep, end_point) : NULL;
 104}
 105
 106static inline struct musb_request *next_request(struct musb_ep *ep)
 107{
 108        struct list_head        *queue = &ep->req_list;
 109
 110        if (list_empty(queue))
 111                return NULL;
 112        return container_of(queue->next, struct musb_request, list);
 113}
 114
 115extern void musb_g_tx(struct musb *musb, u8 epnum);
 116extern void musb_g_rx(struct musb *musb, u8 epnum);
 117
 118extern const struct usb_ep_ops musb_g_ep0_ops;
 119
 120extern int musb_gadget_setup(struct musb *);
 121extern void musb_gadget_cleanup(struct musb *);
 122
 123extern void musb_g_giveback(struct musb_ep *, struct usb_request *, int);
 124
 125extern void musb_ep_restart(struct musb *, struct musb_request *);
 126
 127#ifdef __UBOOT__
 128int musb_gadget_start(struct usb_gadget *g, struct usb_gadget_driver *driver);
 129#endif
 130#endif          /* __MUSB_GADGET_H */
 131