| 1 | /*
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| 2 | * Copyright (c) 2011 Jan Vesely
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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 | #include <usb/dev.h>
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| 30 | #include <errno.h>
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| 31 | #include <usb_iface.h>
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| 32 |
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| 33 | /** Find host controller handle, address and iface number for the device.
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| 34 | *
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| 35 | * @param[in] device_handle Device devman handle.
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| 36 | * @param[out] hc_handle Where to store handle of host controller
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| 37 | * controlling device with @p device_handle handle.
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| 38 | * @param[out] address Place to store the device's address
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| 39 | * @param[out] iface Place to stoer the assigned USB interface number.
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| 40 | * @return Error code.
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| 41 | */
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| 42 | int usb_get_info_by_handle(devman_handle_t device_handle,
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| 43 | devman_handle_t *hc_handle, usb_address_t *address, int *iface)
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| 44 | {
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| 45 | async_sess_t *parent_sess =
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| 46 | devman_parent_device_connect(EXCHANGE_ATOMIC, device_handle,
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| 47 | IPC_FLAG_BLOCKING);
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| 48 | if (!parent_sess)
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| 49 | return ENOMEM;
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| 50 |
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| 51 | async_exch_t *exch = async_exchange_begin(parent_sess);
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| 52 | if (!exch) {
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| 53 | async_hangup(parent_sess);
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| 54 | return ENOMEM;
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| 55 | }
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| 56 |
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| 57 | usb_address_t tmp_address;
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| 58 | devman_handle_t tmp_handle;
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| 59 | int tmp_iface;
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| 60 |
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| 61 | if (address) {
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| 62 | const int ret = usb_get_my_address(exch, &tmp_address);
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| 63 | if (ret != EOK) {
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| 64 | async_exchange_end(exch);
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| 65 | async_hangup(parent_sess);
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| 66 | return ret;
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| 67 | }
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| 68 | }
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| 69 |
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| 70 | if (hc_handle) {
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| 71 | const int ret = usb_get_hc_handle(exch, &tmp_handle);
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| 72 | if (ret != EOK) {
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| 73 | async_exchange_end(exch);
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| 74 | async_hangup(parent_sess);
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| 75 | return ret;
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| 76 | }
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| 77 | }
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| 78 |
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| 79 | if (iface) {
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| 80 | const int ret = usb_get_my_interface(exch, &tmp_iface);
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| 81 | switch (ret) {
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| 82 | case ENOTSUP:
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| 83 | /* Implementing GET_MY_INTERFACE is voluntary. */
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| 84 | tmp_iface = -1;
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| 85 | case EOK:
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| 86 | break;
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| 87 | default:
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| 88 | async_exchange_end(exch);
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| 89 | async_hangup(parent_sess);
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| 90 | return ret;
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| 91 | }
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| 92 | }
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| 93 |
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| 94 | if (hc_handle)
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| 95 | *hc_handle = tmp_handle;
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| 96 |
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| 97 | if (address)
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| 98 | *address = tmp_address;
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| 99 |
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| 100 | if (iface)
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| 101 | *iface = tmp_iface;
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| 102 |
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| 103 | async_exchange_end(exch);
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| 104 | async_hangup(parent_sess);
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| 105 |
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| 106 | return EOK;
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| 107 | }
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