source: mainline/uspace/srv/hw/bus/usb/hcd/virtual/hcd.c@ b8100da

/*
 * 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.
 */

/** @addtogroup usb
 * @{
 */ 
/** @file
 * @brief Virtual host controller driver.
 */

#include <devmap.h>
#include <ipc/ipc.h>
#include <async.h>
#include <unistd.h>
#include <stdlib.h>
#include <sysinfo.h>
#include <stdio.h>
#include <errno.h>
#include <str_error.h>

#include <usb/hcd.h>
#include "vhcd.h"
#include "hc.h"
#include "devices.h"
#include "conn.h"


static void client_connection(ipc_callid_t iid, ipc_call_t *icall)
{
        ipcarg_t phone_hash = icall->in_phone_hash;
        
        ipc_answer_0(iid, EOK);
        printf("%s: new client connected (phone %#x).\n", NAME, phone_hash);
        
        while (true) {
                ipc_callid_t callid; 
                ipc_call_t call; 
                
                callid = async_get_call(&call);
                
                /*
                 * We can do nothing until we have the callback phone.
                 * Thus, we will wait for the callback and start processing
                 * after that.
                 */
                int method = (int) IPC_GET_METHOD(call);
                
                if (method == IPC_M_PHONE_HUNGUP) {
                        ipc_answer_0(callid, EOK);
                        return;
                }
                
                if (method == IPC_M_CONNECT_TO_ME) {
                        int kind = IPC_GET_ARG1(call);
                        int callback = IPC_GET_ARG5(call);
                        
                        /*
                         * Determine whether host connected to us
                         * or a device.
                         */
                        if (kind == 0) {
                                ipc_answer_0(callid, EOK);
                                connection_handler_host(phone_hash, callback);
                                return;
                        } else if (kind == 1) {
                                int device_id = IPC_GET_ARG2(call);
                                virtdev_connection_t *dev
                                    = virtdev_recognise(device_id, callback);
                                if (!dev) {
                                        ipc_answer_0(callid, EEXISTS);
                                        ipc_hangup(callback);
                                        return;
                                }
                                ipc_answer_0(callid, EOK);
                                connection_handler_device(phone_hash, dev);
                                virtdev_destroy_device(dev);
                                return;
                        } else {
                                ipc_answer_0(callid, EINVAL);
                                ipc_hangup(callback);
                                return;
                        }
                }
                
                /*
                 * No other methods could be served now.
                 */
                ipc_answer_0(callid, ENOTSUP);
        }
}

int main(int argc, char * argv[])
{
        printf("%s: Virtual USB host controller driver.\n", NAME);
        
        int rc;
        
        rc = devmap_driver_register(NAME, client_connection); 
        if (rc != EOK) {
                printf("%s: unable to register driver (%s).\n",
                    NAME, str_error(rc));
                return 1;
        }

        rc = devmap_device_register(DEVMAP_PATH, NULL);
        if (rc != EOK) {
                printf("%s: unable to register device %s (%s).\n",
                    NAME, DEVMAP_PATH, str_error(rc));
                return 1;
        }
        
        printf("%s: accepting connections.\n", NAME);
        hc_manager();
        
        return 0;
}


/**
 * @}
 */