| 1 | /*
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| 2 | * Copyright (c) 2010 Matus Dekanek
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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 drvusbhub
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| 30 | * @{
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| 31 | */
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| 32 | /** @file
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| 33 | * @brief various utilities
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| 34 | */
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| 35 | #include <ddf/driver.h>
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| 36 | #include <errno.h>
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| 37 |
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| 38 | #include <usbhc_iface.h>
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| 39 | #include <usb/descriptor.h>
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| 40 | #include <usb/classes/hub.h>
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| 41 | #include <usb/debug.h>
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| 42 |
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| 43 |
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| 44 | #include "usbhub.h"
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| 45 | #include "utils.h"
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| 46 |
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| 47 |
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| 48 | /**
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| 49 | * Deserialize descriptor into given pointer
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| 50 | *
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| 51 | * @param serialized_descriptor
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| 52 | * @param descriptor
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| 53 | * @return
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| 54 | */
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| 55 | int usb_deserialize_hub_desriptor(
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| 56 | void *serialized_descriptor, size_t size, usb_hub_descriptor_t *descriptor)
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| 57 | {
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| 58 | uint8_t *sdescriptor = serialized_descriptor;
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| 59 |
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| 60 | if (sdescriptor[1] != USB_DESCTYPE_HUB) {
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| 61 | usb_log_error("Trying to deserialize wrong descriptor %x\n",
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| 62 | sdescriptor[1]);
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| 63 | return EINVAL;
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| 64 | }
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| 65 | if (size < 7) {
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| 66 | usb_log_error("Serialized descriptor too small.\n");
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| 67 | return EOVERFLOW;
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| 68 | }
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| 69 |
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| 70 | descriptor->ports_count = sdescriptor[2];
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| 71 | descriptor->hub_characteristics = sdescriptor[3] + 256 * sdescriptor[4];
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| 72 | descriptor->pwr_on_2_good_time = sdescriptor[5];
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| 73 | descriptor->current_requirement = sdescriptor[6];
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| 74 | const size_t var_size = (descriptor->ports_count + 7) / 8;
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| 75 |
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| 76 | if (size < (7 + var_size)) {
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| 77 | usb_log_error("Serialized descriptor too small.\n");
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| 78 | return EOVERFLOW;
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| 79 | }
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| 80 | size_t i = 0;
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| 81 | for (; i < var_size; ++i) {
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| 82 | descriptor->devices_removable[i] = sdescriptor[7 + i];
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| 83 | }
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| 84 | return EOK;
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| 85 | }
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| 86 | /*----------------------------------------------------------------------------*/
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| 87 | /**
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| 88 | * @}
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| 89 | */
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