source: mainline/uspace/lib/usbhost/src/usb_transfer_batch.c@ a312d8f

/*
 * 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
 * USB transfer transaction structures (implementation).
 */

#include <usb/host/usb_transfer_batch.h>
#include <usb/host/endpoint.h>
#include <usb/host/bus.h>
#include <usb/debug.h>

#include <assert.h>
#include <errno.h>
#include <str_error.h>


/** Create a batch on given endpoint.
 */
usb_transfer_batch_t *usb_transfer_batch_create(endpoint_t *ep)
{
        assert(ep);
        assert(ep->bus);

        usb_transfer_batch_t *batch;
        if (ep->bus->ops.create_batch)
                batch = ep->bus->ops.create_batch(ep->bus, ep);
        else
                batch = malloc(sizeof(usb_transfer_batch_t));

        return batch;
}

/** Initialize given batch structure.
 */
void usb_transfer_batch_init(usb_transfer_batch_t *batch, endpoint_t *ep)
{
        endpoint_use(ep);

        memset(batch, 0, sizeof(*batch));
        batch->ep = ep;
}

/** Call the handler of the batch.
 *
 * @param[in] batch Batch structure to use.
 */
static int batch_complete(usb_transfer_batch_t *batch)
{
        assert(batch);

        usb_log_debug2("Batch %p " USB_TRANSFER_BATCH_FMT " completed.\n",
            batch, USB_TRANSFER_BATCH_ARGS(*batch));

        if (batch->error == EOK && batch->toggle_reset_mode != RESET_NONE) {
                usb_log_debug2("Batch %p " USB_TRANSFER_BATCH_FMT " resets %s",
                    batch, USB_TRANSFER_BATCH_ARGS(*batch),
                    batch->toggle_reset_mode == RESET_ALL ? "all EPs toggle" : "EP toggle");
                bus_reset_toggle(batch->ep->bus, 
                    batch->target, batch->toggle_reset_mode == RESET_ALL);
        }

        return batch->on_complete
                ? batch->on_complete(batch)
                : EOK;
}

/** Destroy the batch.
 *
 * @param[in] batch Batch structure to use.
 */
void usb_transfer_batch_destroy(usb_transfer_batch_t *batch)
{
        assert(batch);
        assert(batch->ep);
        assert(batch->ep->bus);

        bus_t *bus = batch->ep->bus;
        if (bus->ops.destroy_batch) {
                usb_log_debug2("Batch %p " USB_TRANSFER_BATCH_FMT " destroying.\n",
                    batch, USB_TRANSFER_BATCH_ARGS(*batch));
                bus->ops.destroy_batch(batch);
        }
        else {
                usb_log_debug2("Batch %p " USB_TRANSFER_BATCH_FMT " disposing.\n",
                    batch, USB_TRANSFER_BATCH_ARGS(*batch));
                free(batch);
        }

        endpoint_release(batch->ep);
}

/** Finish a transfer batch: call handler, destroy batch, release endpoint.
 *
 * Call only after the batch have been scheduled && completed!
 *
 * @param[in] batch Batch structure to use.
 */
void usb_transfer_batch_finish(usb_transfer_batch_t *batch)
{
        const int err = batch_complete(batch);
        if (err)
                usb_log_warning("batch %p failed to complete: %s", batch, str_error(err));

        usb_transfer_batch_destroy(batch);
}

/**
 * @}
 */