endpoint.c

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/*
 * 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.
 */

#include <assert.h>
#include <stdlib.h>
#include <errno.h>
#include <usb/host/endpoint.h>

int endpoint_init(endpoint_t *instance, usb_address_t address,
    usb_endpoint_t endpoint, usb_direction_t direction,
    usb_transfer_type_t type, usb_speed_t speed, size_t max_packet_size)
{
        assert(instance);
        instance->address = address;
        instance->endpoint = endpoint;
        instance->direction = direction;
        instance->transfer_type = type;
        instance->speed = speed;
        instance->max_packet_size = max_packet_size;
        instance->toggle = 0;
        instance->active = false;
        fibril_mutex_initialize(&instance->guard);
        fibril_condvar_initialize(&instance->avail);
        endpoint_clear_hc_data(instance);
        return EOK;
}
/*----------------------------------------------------------------------------*/
void endpoint_destroy(endpoint_t *instance)
{
        assert(instance);
        assert(!instance->active);
        free(instance);
}
/*----------------------------------------------------------------------------*/
void endpoint_set_hc_data(endpoint_t *instance,
    void *data, int (*toggle_get)(void *), void (*toggle_set)(void *, int))
{
        assert(instance);
        instance->hc_data.data = data;
        instance->hc_data.toggle_get = toggle_get;
        instance->hc_data.toggle_set = toggle_set;
}
/*----------------------------------------------------------------------------*/
void endpoint_clear_hc_data(endpoint_t *instance)
{
        assert(instance);
        instance->hc_data.data = NULL;
        instance->hc_data.toggle_get = NULL;
        instance->hc_data.toggle_set = NULL;
}
/*----------------------------------------------------------------------------*/
void endpoint_use(endpoint_t *instance)
{
        assert(instance);
        fibril_mutex_lock(&instance->guard);
        while (instance->active)
                fibril_condvar_wait(&instance->avail, &instance->guard);
        instance->active = true;
        fibril_mutex_unlock(&instance->guard);
}
/*----------------------------------------------------------------------------*/
void endpoint_release(endpoint_t *instance)
{
        assert(instance);
        fibril_mutex_lock(&instance->guard);
        instance->active = false;
        fibril_mutex_unlock(&instance->guard);
        fibril_condvar_signal(&instance->avail);
}
/*----------------------------------------------------------------------------*/
int endpoint_toggle_get(endpoint_t *instance)
{
        assert(instance);
        if (instance->hc_data.toggle_get)
                instance->toggle =
                    instance->hc_data.toggle_get(instance->hc_data.data);
        return (int)instance->toggle;
}
/*----------------------------------------------------------------------------*/
void endpoint_toggle_set(endpoint_t *instance, int toggle)
{
        assert(instance);
        assert(toggle == 0 || toggle == 1);
        if (instance->hc_data.toggle_set)
                instance->hc_data.toggle_set(instance->hc_data.data, toggle);
        instance->toggle = toggle;
}
/*----------------------------------------------------------------------------*/
void endpoint_toggle_reset_filtered(endpoint_t *instance, usb_target_t target)
{
        assert(instance);
        if (instance->address == target.address &&
            (instance->endpoint == target.endpoint || target.endpoint == 0))
                endpoint_toggle_set(instance, 0);
}

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