source: mainline/uspace/drv/usbmid/main.c@ ce794342

/*
 * 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.
 */

/** @addtogroup drvusbmid
 * @{
 */
/**
 * @file
 * Main routines of USB multi interface device driver.
 */
#include <errno.h>
#include <str_error.h>
#include <usb/debug.h>
#include <usb/classes/classes.h>
#include <usb/request.h>
#include <usb/descriptor.h>
#include <usb/pipes.h>

#include "usbmid.h"

/** Callback when new MID device is attached to the host.
 *
 * @param gen_dev Generic DDF device representing the new device.
 * @return Error code.
 */
static int usbmid_add_device(ddf_dev_t *gen_dev)
{
        usbmid_device_t *dev = usbmid_device_create(gen_dev);
        if (dev == NULL) {
                return ENOMEM;
        }

        usb_log_info("Taking care of new MID: addr %d (HC %zu)\n",
            dev->wire.address, dev->wire.hc_handle);

        int rc;

        rc = usb_pipe_start_session(&dev->ctrl_pipe);
        if (rc != EOK) {
                usb_log_error("Failed to start session on control pipe: %s.\n",
                    str_error(rc));
                goto error_leave;
        }

        bool accept = usbmid_explore_device(dev);

        rc = usb_pipe_end_session(&dev->ctrl_pipe);
        if (rc != EOK) {
                usb_log_warning("Failed to end session on control pipe: %s.\n",
                    str_error(rc));
        }

        if (!accept) {
                rc = ENOTSUP;
                goto error_leave;
        }

        gen_dev->driver_data = dev;

        return EOK;


error_leave:
        free(dev);
        return rc;
}

/** USB MID driver ops. */
static driver_ops_t mid_driver_ops = {
        .add_device = usbmid_add_device,
};

/** USB MID driver. */
static driver_t mid_driver = {
        .name = NAME,
        .driver_ops = &mid_driver_ops
};

int main(int argc, char *argv[])
{
        printf(NAME ": USB multi interface device driver.\n");

        usb_log_enable(USB_LOG_LEVEL_DEFAULT, NAME);
        return ddf_driver_main(&mid_driver);
}

/**
 * @}
 */