| 1 | /*
|
|---|
| 2 | * Copyright (c) 2011 Jan Vesely
|
|---|
| 3 | * Copyright (c) 2011 Vojtech Horky
|
|---|
| 4 | * All rights reserved.
|
|---|
| 5 | *
|
|---|
| 6 | * Redistribution and use in source and binary forms, with or without
|
|---|
| 7 | * modification, are permitted provided that the following conditions
|
|---|
| 8 | * are met:
|
|---|
| 9 | *
|
|---|
| 10 | * - Redistributions of source code must retain the above copyright
|
|---|
| 11 | * notice, this list of conditions and the following disclaimer.
|
|---|
| 12 | * - Redistributions in binary form must reproduce the above copyright
|
|---|
| 13 | * notice, this list of conditions and the following disclaimer in the
|
|---|
| 14 | * documentation and/or other materials provided with the distribution.
|
|---|
| 15 | * - The name of the author may not be used to endorse or promote products
|
|---|
| 16 | * derived from this software without specific prior written permission.
|
|---|
| 17 | *
|
|---|
| 18 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
|
|---|
| 19 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
|
|---|
| 20 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
|
|---|
| 21 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
|
|---|
| 22 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
|
|---|
| 23 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
|---|
| 24 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
|---|
| 25 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|---|
| 26 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
|
|---|
| 27 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|---|
| 28 | */
|
|---|
| 29 |
|
|---|
| 30 | #include <usb/dev.h>
|
|---|
| 31 | #include <errno.h>
|
|---|
| 32 | #include <usb_iface.h>
|
|---|
| 33 | #include <str.h>
|
|---|
| 34 | #include <stdio.h>
|
|---|
| 35 |
|
|---|
| 36 | /** Resolve handle and address of USB device from its path.
|
|---|
| 37 | *
|
|---|
| 38 | * This is a wrapper working on best effort principle.
|
|---|
| 39 | * If the resolving fails, if will not give much details about what
|
|---|
| 40 | * is wrong.
|
|---|
| 41 | * Typically, error from this function would be reported to the user
|
|---|
| 42 | * as "bad device specification" or "device does not exist".
|
|---|
| 43 | *
|
|---|
| 44 | * The path can be specified in following format:
|
|---|
| 45 | * - devman path (e.g. /hw/pci0/.../usb01_a5
|
|---|
| 46 | * - bus number and device address (e.g. 5.1)
|
|---|
| 47 | * - bus number, device address and device function (e.g. 2.1/HID0/keyboard)
|
|---|
| 48 | *
|
|---|
| 49 | * @param[in] dev_path Path to the device.
|
|---|
| 50 | * @param[out] out_hc_handle Where to store handle of a parent host controller.
|
|---|
| 51 | * @param[out] out_dev_addr Where to store device (USB) address.
|
|---|
| 52 | * @param[out] out_dev_handle Where to store device handle.
|
|---|
| 53 | * @return Error code.
|
|---|
| 54 | */
|
|---|
| 55 | errno_t usb_resolve_device_handle(const char *dev_path, devman_handle_t *dev_handle)
|
|---|
| 56 | {
|
|---|
| 57 | if (dev_path == NULL || dev_handle == NULL) {
|
|---|
| 58 | return EBADMEM;
|
|---|
| 59 | }
|
|---|
| 60 |
|
|---|
| 61 | /* First, try to get the device handle. */
|
|---|
| 62 | errno_t rc = devman_fun_get_handle(dev_path, dev_handle, 0);
|
|---|
| 63 |
|
|---|
| 64 | /* Next, try parsing dev_handle from the provided string */
|
|---|
| 65 | if (rc != EOK) {
|
|---|
| 66 | *dev_handle = strtoul(dev_path, NULL, 10);
|
|---|
| 67 | //FIXME: check errno
|
|---|
| 68 | rc = EOK;
|
|---|
| 69 | }
|
|---|
| 70 | return rc;
|
|---|
| 71 | }
|
|---|
