/* * 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 libusbvirt * @{ */ /** @file * Virtual USB device main routines. */ #include <errno.h> #include <str.h> #include <stdio.h> #include <assert.h> #include <async.h> #include <devman.h> #include <usbvirt/device.h> #include <usbvirt/ipc.h> #include <usb/debug.h> /** Current device. */ static usbvirt_device_t *DEV = NULL; /** Main IPC call handling from virtual host controller. * * @param icall Initial incoming call * @param arg Local argument * */ static void callback_connection(ipc_call_t *icall, void *arg) { assert(DEV != NULL); async_accept_0(icall); while (true) { ipc_call_t call; async_get_call(&call); bool processed = usbvirt_ipc_handle_call(DEV, &call); if (!processed) { if (!ipc_get_imethod(&call)) { async_answer_0(&call, EOK); return; } else async_answer_0(&call, EINVAL); } } } /** Connect the device to the virtual host controller. * * @param dev The virtual device to be (virtually) plugged in. * @param vhc_path Devman path to the virtual host controller. * @return Error code. */ errno_t usbvirt_device_plug(usbvirt_device_t *dev, const char *vhc_path) { if (DEV != NULL) return ELIMIT; devman_handle_t handle; errno_t rc = devman_fun_get_handle(vhc_path, &handle, 0); if (rc != EOK) return rc; async_sess_t *hcd_sess = devman_device_connect(handle, 0); if (!hcd_sess) return ENOMEM; DEV = dev; dev->vhc_sess = hcd_sess; async_exch_t *exch = async_exchange_begin(hcd_sess); port_id_t port; rc = async_create_callback_port(exch, INTERFACE_USBVIRT_CB, 0, 0, callback_connection, NULL, &port); async_exchange_end(exch); if (rc != EOK) DEV = NULL; return rc; } /** Disconnect the device from virtual host controller. * * @param dev Device to be disconnected. */ void usbvirt_device_unplug(usbvirt_device_t *dev) { async_hangup(dev->vhc_sess); } /** * @} */