| 1 | /*
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| 2 | * Copyright (c) 2011 Vojtech Horky
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| 3 | * All rights reserved.
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| 4 | *
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| 5 | * Redistribution and use in source and binary forms, with or without
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| 6 | * modification, are permitted provided that the following conditions
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| 7 | * are met:
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| 8 | *
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| 9 | * - Redistributions of source code must retain the above copyright
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| 10 | * notice, this list of conditions and the following disclaimer.
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| 11 | * - Redistributions in binary form must reproduce the above copyright
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| 12 | * notice, this list of conditions and the following disclaimer in the
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| 13 | * documentation and/or other materials provided with the distribution.
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| 14 | * - The name of the author may not be used to endorse or promote products
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| 15 | * derived from this software without specific prior written permission.
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| 16 | *
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| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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| 27 | */
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| 28 |
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| 29 | /** @addtogroup libusbvirt
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| 30 | * @{
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| 31 | */
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| 32 | /** @file
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| 33 | * Virtual USB device main routines.
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| 34 | */
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| 35 |
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| 36 | #include <errno.h>
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| 37 | #include <str.h>
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| 38 | #include <stdio.h>
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| 39 | #include <assert.h>
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| 40 | #include <async.h>
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| 41 | #include <devman.h>
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| 42 | #include <usbvirt/device.h>
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| 43 | #include <usbvirt/ipc.h>
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| 44 |
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| 45 | #include <usb/debug.h>
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| 46 |
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| 47 | /** Current device. */
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| 48 | static usbvirt_device_t *DEV = NULL;
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| 49 |
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| 50 | /** Main IPC call handling from virtual host controller.
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| 51 | *
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| 52 | * @param icall Initial incoming call
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| 53 | * @param arg Local argument
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| 54 | *
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| 55 | */
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| 56 | static void callback_connection(ipc_call_t *icall, void *arg)
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| 57 | {
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| 58 | assert(DEV != NULL);
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| 59 |
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| 60 | async_accept_0(icall);
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| 61 |
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| 62 | while (true) {
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| 63 | ipc_call_t call;
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| 64 | async_get_call(&call);
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| 65 |
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| 66 | bool processed = usbvirt_ipc_handle_call(DEV, &call);
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| 67 | if (!processed) {
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| 68 | if (!IPC_GET_IMETHOD(call)) {
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| 69 | async_answer_0(&call, EOK);
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| 70 | return;
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| 71 | } else
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| 72 | async_answer_0(&call, EINVAL);
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| 73 | }
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| 74 | }
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| 75 | }
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| 76 |
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| 77 | /** Connect the device to the virtual host controller.
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| 78 | *
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| 79 | * @param dev The virtual device to be (virtually) plugged in.
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| 80 | * @param vhc_path Devman path to the virtual host controller.
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| 81 | * @return Error code.
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| 82 | */
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| 83 | errno_t usbvirt_device_plug(usbvirt_device_t *dev, const char *vhc_path)
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| 84 | {
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| 85 | if (DEV != NULL)
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| 86 | return ELIMIT;
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| 87 |
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| 88 | devman_handle_t handle;
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| 89 | errno_t rc = devman_fun_get_handle(vhc_path, &handle, 0);
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| 90 | if (rc != EOK)
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| 91 | return rc;
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| 92 |
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| 93 | async_sess_t *hcd_sess =
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| 94 | devman_device_connect(handle, 0);
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| 95 | if (!hcd_sess)
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| 96 | return ENOMEM;
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| 97 |
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| 98 | DEV = dev;
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| 99 | dev->vhc_sess = hcd_sess;
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| 100 |
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| 101 | async_exch_t *exch = async_exchange_begin(hcd_sess);
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| 102 |
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| 103 | port_id_t port;
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| 104 | rc = async_create_callback_port(exch, INTERFACE_USBVIRT_CB, 0, 0,
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| 105 | callback_connection, NULL, &port);
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| 106 |
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| 107 | async_exchange_end(exch);
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| 108 |
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| 109 | if (rc != EOK)
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| 110 | DEV = NULL;
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| 111 |
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| 112 | return rc;
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| 113 | }
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| 114 |
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| 115 | /** Disconnect the device from virtual host controller.
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| 116 | *
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| 117 | * @param dev Device to be disconnected.
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| 118 | */
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| 119 | void usbvirt_device_unplug(usbvirt_device_t *dev)
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| 120 | {
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| 121 | async_hangup(dev->vhc_sess);
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| 122 | }
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| 123 |
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| 124 | /**
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| 125 | * @}
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| 126 | */
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