| 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 libusb
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| 30 | * @{
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| 31 | */
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| 32 | /** @file
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| 33 | *
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| 34 | */
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| 35 | #include <devman.h>
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| 36 | #include <dev_iface.h>
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| 37 | #include <usb_iface.h>
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| 38 | #include <usb/driver.h>
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| 39 | #include <errno.h>
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| 40 |
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| 41 |
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| 42 | /** Find host controller handle that is ancestor of given device.
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| 43 | *
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| 44 | * @param[in] device_handle Device devman handle.
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| 45 | * @param[out] hc_handle Where to store handle of host controller
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| 46 | * controlling device with @p device_handle handle.
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| 47 | * @return Error code.
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| 48 | */
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| 49 | int usb_hc_find(devman_handle_t device_handle, devman_handle_t *hc_handle)
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| 50 | {
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| 51 | int parent_phone = devman_parent_device_connect(device_handle,
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| 52 | IPC_FLAG_BLOCKING);
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| 53 | if (parent_phone < 0) {
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| 54 | return parent_phone;
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| 55 | }
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| 56 |
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| 57 | devman_handle_t h;
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| 58 | int rc = async_req_1_1(parent_phone, DEV_IFACE_ID(USB_DEV_IFACE),
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| 59 | IPC_M_USB_GET_HOST_CONTROLLER_HANDLE, &h);
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| 60 |
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| 61 | async_hangup(parent_phone);
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| 62 |
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| 63 | if (rc != EOK) {
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| 64 | return rc;
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| 65 | }
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| 66 |
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| 67 | if (hc_handle != NULL) {
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| 68 | *hc_handle = h;
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| 69 | }
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| 70 |
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| 71 | return EOK;
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| 72 | }
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| 73 |
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| 74 | /**
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| 75 | * @}
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| 76 | */
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