source: mainline/uspace/drv/test2/test2.c@ 7e7f0f5

/*
 * Copyright (c) 2010 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.
 */

/** @file
 */

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

#define NAME "test2"

static int add_device(device_t *dev);

static driver_ops_t driver_ops = {
        .add_device = &add_device
};

static driver_t the_driver = {
        .name = NAME,
        .driver_ops = &driver_ops
};

/** Register child and inform user about it.
 *
 * @param parent Parent device.
 * @param message Message for the user.
 * @param name Device name.
 * @param match_id Device match id.
 * @param score Device match score.
 */
static void register_child_verbose(device_t *parent, const char *message,
    const char *name, const char *match_id, int match_score)
{
        printf(NAME ": registering child device `%s': %s.\n",
           name, message);

        int rc = child_device_register_wrapper(parent, name,
            match_id, match_score, NULL);

        if (rc == EOK) {
                printf(NAME ": registered child device `%s'.\n", name);
        } else {
                printf(NAME ": failed to register child `%s' (%s).\n",
                    name, str_error(rc));
        }
}

/** Add child devices after some sleep.
 *
 * @param arg Parent device structure (device_t *).
 * @return Always EOK.
 */
static int postponed_birth(void *arg)
{
        device_t *dev = (device_t *) arg;

        async_usleep(1000);

        register_child_verbose(dev, "child driven by the same task",
            "child", "virtual&test2", 10);
        register_child_verbose(dev, "child driven by test1",
            "test1", "virtual&test1", 10);

        add_device_to_class(dev, "virtual");

        return EOK;
}


static int add_device(device_t *dev)
{
        printf(NAME ": add_device(name=\"%s\", handle=%d)\n",
            dev->name, (int) dev->handle);

        if (dev->parent == NULL) {
                fid_t postpone = fibril_create(postponed_birth, dev);
                if (postpone == 0) {
                        printf(NAME ": fibril_create() error\n");
                        return ENOMEM;
                }
                fibril_add_ready(postpone);
        } else {
                register_child_verbose(dev, "child without available driver",
                    "ERROR", "non-existent.match.id", 10);
        }

        return EOK;
}

int main(int argc, char *argv[])
{
        printf(NAME ": HelenOS test2 virtual device driver\n");
        return driver_main(&the_driver);
}