dev.c

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/*
 * Copyright (c) 2011 Vojtech Horky
 * 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 <usb/dev/pipes.h>
#include <errno.h>
#include <str_error.h>
#include <usb/dev/request.h>
#include "usbinfo.h"

usbinfo_device_t *prepare_device(const char *name,
    devman_handle_t hc_handle, usb_address_t dev_addr)
{
        usbinfo_device_t *dev = malloc(sizeof(usbinfo_device_t));
        if (dev == NULL) {
                fprintf(stderr, NAME ": memory allocation failed.\n");
                return NULL;
        }

        int rc;
        bool transfer_started = false;

        rc = usb_device_connection_initialize(&dev->wire, hc_handle, dev_addr);
        if (rc != EOK) {
                fprintf(stderr,
                    NAME ": failed to create connection to device %s: %s.\n",
                    name, str_error(rc));
                goto leave;
        }

        rc = usb_pipe_initialize_default_control(&dev->ctrl_pipe,
            &dev->wire);
        if (rc != EOK) {
                fprintf(stderr,
                    NAME ": failed to create default control pipe to %s: %s.\n",
                    name, str_error(rc));
                goto leave;
        }

        rc = usb_pipe_probe_default_control(&dev->ctrl_pipe);
        if (rc != EOK) {
                if (rc == ENOENT) {
                        fprintf(stderr, NAME ": " \
                            "device %s not present or malfunctioning.\n",
                            name);
                } else {
                        fprintf(stderr, NAME ": " \
                            "probing default control pipe of %s failed: %s.\n",
                            name, str_error(rc));
                }
                goto leave;
        }

        usb_pipe_start_long_transfer(&dev->ctrl_pipe);
        transfer_started = true;

        rc = usb_request_get_device_descriptor(&dev->ctrl_pipe,
            &dev->device_descriptor);
        if (rc != EOK) {
                fprintf(stderr,
                    NAME ": failed to retrieve device descriptor of %s: %s.\n",
                    name, str_error(rc));
                goto leave;
        }

        rc = usb_request_get_full_configuration_descriptor_alloc(
            &dev->ctrl_pipe, 0, (void **)&dev->full_configuration_descriptor,
            &dev->full_configuration_descriptor_size);
        if (rc != EOK) {
                fprintf(stderr, NAME ": " \
                    "failed to retrieve configuration descriptor of %s: %s.\n",
                    name, str_error(rc));
                goto leave;
        }

        return dev;


leave:
        if (transfer_started) {
                usb_pipe_end_long_transfer(&dev->ctrl_pipe);
        }

        free(dev);

        return NULL;
}

void destroy_device(usbinfo_device_t *dev)
{
        usb_pipe_end_long_transfer(&dev->ctrl_pipe);
        free(dev);
}

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