source: mainline/uspace/lib/usbhost/include/usb/host/endpoint.h@ 569a51a

/*
 * Copyright (c) 2011 Jan Vesely
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 * - The name of the author may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

/** @addtogroup libusbhost
 * @{
 */
/** @file
 *
 */
#ifndef LIBUSBHOST_HOST_ENDPOINT_H
#define LIBUSBHOST_HOST_ENDPOINT_H

#include <stdbool.h>
#include <adt/list.h>
#include <fibril_synch.h>
#include <usb/usb.h>
#include <atomic.h>

/** Host controller side endpoint structure. */
typedef struct endpoint {
        /** Reference count. */
        atomic_t refcnt;        
        /** Part of linked list. */
        link_t link;
        /** USB address. */
        usb_address_t address;
        /** USB endpoint number. */
        usb_endpoint_t endpoint;
        /** Communication direction. */
        usb_direction_t direction;
        /** USB transfer type. */
        usb_transfer_type_t transfer_type;
        /** Communication speed. */
        usb_speed_t speed;
        /** Maximum size of data packets. */
        size_t max_packet_size;
        /** Additional opportunities per uframe */
        unsigned packets;
        /** Necessary bandwidth. */
        size_t bandwidth;
        /** Value of the toggle bit. */
        unsigned toggle:1;
        /** True if there is a batch using this scheduled for this endpoint. */
        volatile bool active;
        /** Protects resources and active status changes. */
        fibril_mutex_t guard;
        /** Signals change of active status. */
        fibril_condvar_t avail;
        /** High speed TT data */
        struct {
                usb_address_t address;
                unsigned port;
        } tt;
        /** Optional device specific data. */
        struct {
                /** Device specific data. */
                void *data;
                /** Callback to get the value of toggle bit. */
                int (*toggle_get)(void *);
                /** Callback to set the value of toggle bit. */
                void (*toggle_set)(void *, int);
        } hc_data;
} endpoint_t;

extern endpoint_t *endpoint_create(usb_address_t, usb_endpoint_t,
    usb_direction_t, usb_transfer_type_t, usb_speed_t, size_t, unsigned int,
    size_t, usb_address_t, unsigned int);
extern void endpoint_destroy(endpoint_t *);

extern void endpoint_add_ref(endpoint_t *);
extern void endpoint_del_ref(endpoint_t *);

extern void endpoint_set_hc_data(endpoint_t *, void *, int (*)(void *),
    void (*)(void *, int));
extern void endpoint_clear_hc_data(endpoint_t *);

extern void endpoint_use(endpoint_t *);
extern void endpoint_release(endpoint_t *);

extern int endpoint_toggle_get(endpoint_t *);
extern void endpoint_toggle_set(endpoint_t *, int);

/** list_get_instance wrapper.
 *
 * @param item Pointer to link member.
 *
 * @return Pointer to endpoint_t structure.
 *
 */
static inline endpoint_t * endpoint_get_instance(link_t *item)
{
        return item ? list_get_instance(item, endpoint_t, link) : NULL;
}
#endif

/**
 * @}
 */