/*
 * Copyright (c) 2011 Vojtech Horky
 * Copyright (c) 2018 Ondrej Hlavaty
 * 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 drvusbvhc
 * @{
 */
/** @file
 * Virtual host controller.
 */

#include <stdio.h>
#include <errno.h>
#include <str_error.h>
#include <ddf/driver.h>

#include <usb/host/ddf_helpers.h>
#include <usb/host/utility.h>

#include <usb/debug.h>
#include "vhcd.h"

static ddf_dev_ops_t vhc_ops = {
	.close = on_client_close,
	.default_handler = default_connection_handler
};

static errno_t vhc_control_node(ddf_dev_t *dev, ddf_fun_t **fun)
{
	assert(dev);
	assert(fun);

	*fun = ddf_fun_create(dev, fun_exposed, "virtual");
	if (!*fun)
		return ENOMEM;

	vhc_data_t *vhc = ddf_fun_data_alloc(*fun, sizeof(vhc_data_t));
	if (!vhc) {
		ddf_fun_destroy(*fun);
	}
	ddf_fun_set_ops(*fun, &vhc_ops);
	const errno_t ret = ddf_fun_bind(*fun);
	if (ret != EOK) {
		ddf_fun_destroy(*fun);
		*fun = NULL;
		return ret;
	}
	return EOK;
}

static errno_t vhc_dev_add(ddf_dev_t *dev)
{
	/* Initialize generic structures */
	errno_t ret = hcd_ddf_setup_hc(dev, sizeof(vhc_data_t));
	if (ret != EOK) {
		usb_log_error("Failed to init HCD structures: %s.",
		    str_error(ret));
		return ret;
	}
	vhc_data_t *vhc = ddf_dev_data_get(dev);
	vhc_init(vhc);

	hc_device_setup(&vhc->base, (bus_t *) &vhc->bus);

	/* Initialize virtual structure */
	ddf_fun_t *ctl_fun = NULL;
	ret = vhc_control_node(dev, &ctl_fun);
	if (ret != EOK) {
		usb_log_error("Failed to setup control node.");
		return ret;
	}

	/* Add virtual hub device */
	ret = vhc_virtdev_plug_hub(vhc, &vhc->hub, NULL, 0);
	if (ret != EOK) {
		usb_log_error("Failed to plug root hub: %s.", str_error(ret));
		ddf_fun_destroy(ctl_fun);
		return ret;
	}

	/*
	 * Creating root hub registers a new USB device so HC
	 * needs to be ready at this time.
	 */
	ret = hc_setup_virtual_root_hub(&vhc->base, USB_SPEED_HIGH);
	if (ret != EOK) {
		usb_log_error("Failed to init VHC root hub: %s",
		    str_error(ret));
		// TODO do something here...
	}

	return ret;
}

static driver_ops_t vhc_driver_ops = {
	.dev_add = vhc_dev_add,
};

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

int main(int argc, char *argv[])
{
	log_init(NAME);
	printf(NAME ": virtual USB host controller driver.\n");

	return ddf_driver_main(&vhc_driver);
}

/**
 * @}
 */