| 1 | /*
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| 2 | * Copyright (c) 2010 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 | * Functions for recognition of attached devices.
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| 34 | */
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| 35 | #include <sys/types.h>
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| 36 | #include <fibril_synch.h>
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| 37 | #include <usb/pipes.h>
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| 38 | #include <usb/recognise.h>
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| 39 | #include <usb/ddfiface.h>
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| 40 | #include <usb/request.h>
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| 41 | #include <usb/classes/classes.h>
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| 42 | #include <stdio.h>
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| 43 | #include <errno.h>
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| 44 | #include <assert.h>
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| 45 |
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| 46 | /** Index to append after device name for uniqueness. */
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| 47 | static size_t device_name_index = 0;
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| 48 | /** Mutex guard for device_name_index. */
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| 49 | static FIBRIL_MUTEX_INITIALIZE(device_name_index_mutex);
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| 50 |
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| 51 | /** DDF operations of child devices. */
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| 52 | ddf_dev_ops_t child_ops = {
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| 53 | .interfaces[USB_DEV_IFACE] = &usb_iface_hub_child_impl
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| 54 | };
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| 55 |
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| 56 | /** Get integer part from BCD coded number. */
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| 57 | #define BCD_INT(a) (((unsigned int)(a)) / 256)
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| 58 | /** Get fraction part from BCD coded number (as an integer, no less). */
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| 59 | #define BCD_FRAC(a) (((unsigned int)(a)) % 256)
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| 60 |
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| 61 | /** Format for BCD coded number to be used in printf. */
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| 62 | #define BCD_FMT "%x.%x"
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| 63 | /** Arguments to printf for BCD coded number. */
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| 64 | #define BCD_ARGS(a) BCD_INT((a)), BCD_FRAC((a))
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| 65 |
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| 66 | /* FIXME: make this dynamic */
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| 67 | #define MATCH_STRING_MAX 256
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| 68 |
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| 69 | /** Add formatted match id.
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| 70 | *
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| 71 | * @param matches List of match ids where to add to.
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| 72 | * @param score Score of the match.
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| 73 | * @param format Printf-like format
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| 74 | * @return Error code.
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| 75 | */
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| 76 | static int usb_add_match_id(match_id_list_t *matches, int score,
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| 77 | const char *format, ...)
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| 78 | {
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| 79 | char *match_str = NULL;
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| 80 | match_id_t *match_id = NULL;
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| 81 | int rc;
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| 82 |
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| 83 | match_str = malloc(MATCH_STRING_MAX + 1);
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| 84 | if (match_str == NULL) {
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| 85 | rc = ENOMEM;
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| 86 | goto failure;
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| 87 | }
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| 88 |
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| 89 | /*
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| 90 | * FIXME: replace with dynamic allocation of exact size
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| 91 | */
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| 92 | va_list args;
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| 93 | va_start(args, format );
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| 94 | vsnprintf(match_str, MATCH_STRING_MAX, format, args);
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| 95 | match_str[MATCH_STRING_MAX] = 0;
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| 96 | va_end(args);
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| 97 |
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| 98 | match_id = create_match_id();
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| 99 | if (match_id == NULL) {
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| 100 | rc = ENOMEM;
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| 101 | goto failure;
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| 102 | }
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| 103 |
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| 104 | match_id->id = match_str;
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| 105 | match_id->score = score;
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| 106 | add_match_id(matches, match_id);
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| 107 |
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| 108 | return EOK;
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| 109 |
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| 110 | failure:
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| 111 | if (match_str != NULL) {
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| 112 | free(match_str);
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| 113 | }
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| 114 | if (match_id != NULL) {
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| 115 | match_id->id = NULL;
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| 116 | delete_match_id(match_id);
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| 117 | }
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| 118 |
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| 119 | return rc;
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| 120 | }
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| 121 |
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| 122 | /** Add match id to list or return with error code.
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| 123 | *
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| 124 | * @param match_ids List of match ids.
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| 125 | * @param score Match id score.
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| 126 | * @param format Format of the matching string
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| 127 | * @param ... Arguments for the format.
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| 128 | */
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| 129 | #define ADD_MATCHID_OR_RETURN(match_ids, score, format, ...) \
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| 130 | do { \
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| 131 | int __rc = usb_add_match_id((match_ids), (score), \
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| 132 | format, ##__VA_ARGS__); \
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| 133 | if (__rc != EOK) { \
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| 134 | return __rc; \
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| 135 | } \
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| 136 | } while (0)
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| 137 |
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| 138 | /** Create device match ids based on its interface.
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| 139 | *
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| 140 | * @param[in] desc_device Device descriptor.
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| 141 | * @param[in] desc_interface Interface descriptor.
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| 142 | * @param[out] matches Initialized list of match ids.
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| 143 | * @return Error code (the two mentioned are not the only ones).
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| 144 | * @retval EINVAL Invalid input parameters (expects non NULL pointers).
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| 145 | * @retval ENOENT Device class is not "use interface".
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| 146 | */
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| 147 | int usb_device_create_match_ids_from_interface(
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| 148 | const usb_standard_device_descriptor_t *desc_device,
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| 149 | const usb_standard_interface_descriptor_t *desc_interface,
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| 150 | match_id_list_t *matches)
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| 151 | {
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| 152 | if (desc_interface == NULL) {
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| 153 | return EINVAL;
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| 154 | }
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| 155 | if (matches == NULL) {
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| 156 | return EINVAL;
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| 157 | }
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| 158 |
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| 159 | if (desc_interface->interface_class == USB_CLASS_USE_INTERFACE) {
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| 160 | return ENOENT;
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| 161 | }
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| 162 |
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| 163 | const char *classname = usb_str_class(desc_interface->interface_class);
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| 164 | assert(classname != NULL);
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| 165 |
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| 166 | #define IFACE_PROTOCOL_FMT "interface&class=%s&subclass=0x%02x&protocol=0x%02x"
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| 167 | #define IFACE_PROTOCOL_ARGS classname, desc_interface->interface_subclass, \
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| 168 | desc_interface->interface_protocol
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| 169 |
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| 170 | #define IFACE_SUBCLASS_FMT "interface&class=%s&subclass=0x%02x"
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| 171 | #define IFACE_SUBCLASS_ARGS classname, desc_interface->interface_subclass
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| 172 |
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| 173 | #define IFACE_CLASS_FMT "interface&class=%s"
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| 174 | #define IFACE_CLASS_ARGS classname
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| 175 |
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| 176 | #define VENDOR_RELEASE_FMT "vendor=0x%04x&product=0x%04x&release=" BCD_FMT
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| 177 | #define VENDOR_RELEASE_ARGS desc_device->vendor_id, desc_device->product_id, \
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| 178 | BCD_ARGS(desc_device->device_version)
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| 179 |
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| 180 | #define VENDOR_PRODUCT_FMT "vendor=0x%04x&product=0x%04x"
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| 181 | #define VENDOR_PRODUCT_ARGS desc_device->vendor_id, desc_device->product_id
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| 182 |
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| 183 | #define VENDOR_ONLY_FMT "vendor=0x%04x"
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| 184 | #define VENDOR_ONLY_ARGS desc_device->vendor_id
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| 185 |
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| 186 | /*
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| 187 | * If the vendor is specified, create match ids with vendor with
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| 188 | * higher score.
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| 189 | * Then the same ones without the vendor part.
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| 190 | */
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| 191 | if ((desc_device != NULL) && (desc_device->vendor_id != 0)) {
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| 192 | /* First, interface matches with device release number. */
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| 193 | ADD_MATCHID_OR_RETURN(matches, 250,
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| 194 | "usb&" VENDOR_RELEASE_FMT "&" IFACE_PROTOCOL_FMT,
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| 195 | VENDOR_RELEASE_ARGS, IFACE_PROTOCOL_ARGS);
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| 196 | ADD_MATCHID_OR_RETURN(matches, 240,
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| 197 | "usb&" VENDOR_RELEASE_FMT "&" IFACE_SUBCLASS_FMT,
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| 198 | VENDOR_RELEASE_ARGS, IFACE_SUBCLASS_ARGS);
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| 199 | ADD_MATCHID_OR_RETURN(matches, 230,
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| 200 | "usb&" VENDOR_RELEASE_FMT "&" IFACE_CLASS_FMT,
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| 201 | VENDOR_RELEASE_ARGS, IFACE_CLASS_ARGS);
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| 202 |
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| 203 | /* Next, interface matches without release number. */
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| 204 | ADD_MATCHID_OR_RETURN(matches, 220,
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| 205 | "usb&" VENDOR_PRODUCT_FMT "&" IFACE_PROTOCOL_FMT,
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| 206 | VENDOR_PRODUCT_ARGS, IFACE_PROTOCOL_ARGS);
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| 207 | ADD_MATCHID_OR_RETURN(matches, 210,
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| 208 | "usb&" VENDOR_PRODUCT_FMT "&" IFACE_SUBCLASS_FMT,
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| 209 | VENDOR_PRODUCT_ARGS, IFACE_SUBCLASS_ARGS);
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| 210 | ADD_MATCHID_OR_RETURN(matches, 200,
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| 211 | "usb&" VENDOR_PRODUCT_FMT "&" IFACE_CLASS_FMT,
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| 212 | VENDOR_PRODUCT_ARGS, IFACE_CLASS_ARGS);
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| 213 |
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| 214 | /* Finally, interface matches with only vendor. */
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| 215 | ADD_MATCHID_OR_RETURN(matches, 190,
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| 216 | "usb&" VENDOR_ONLY_FMT "&" IFACE_PROTOCOL_FMT,
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| 217 | VENDOR_ONLY_ARGS, IFACE_PROTOCOL_ARGS);
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| 218 | ADD_MATCHID_OR_RETURN(matches, 180,
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| 219 | "usb&" VENDOR_ONLY_FMT "&" IFACE_SUBCLASS_FMT,
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| 220 | VENDOR_ONLY_ARGS, IFACE_SUBCLASS_ARGS);
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| 221 | ADD_MATCHID_OR_RETURN(matches, 170,
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| 222 | "usb&" VENDOR_ONLY_FMT "&" IFACE_CLASS_FMT,
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| 223 | VENDOR_ONLY_ARGS, IFACE_CLASS_ARGS);
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| 224 | }
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| 225 |
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| 226 | /* Now, the same but without any vendor specification. */
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| 227 | ADD_MATCHID_OR_RETURN(matches, 160,
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| 228 | "usb&" IFACE_PROTOCOL_FMT,
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| 229 | IFACE_PROTOCOL_ARGS);
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| 230 | ADD_MATCHID_OR_RETURN(matches, 150,
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| 231 | "usb&" IFACE_SUBCLASS_FMT,
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| 232 | IFACE_SUBCLASS_ARGS);
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| 233 | ADD_MATCHID_OR_RETURN(matches, 140,
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| 234 | "usb&" IFACE_CLASS_FMT,
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| 235 | IFACE_CLASS_ARGS);
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| 236 |
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| 237 | #undef IFACE_PROTOCOL_FMT
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| 238 | #undef IFACE_PROTOCOL_ARGS
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| 239 | #undef IFACE_SUBCLASS_FMT
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| 240 | #undef IFACE_SUBCLASS_ARGS
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| 241 | #undef IFACE_CLASS_FMT
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| 242 | #undef IFACE_CLASS_ARGS
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| 243 | #undef VENDOR_RELEASE_FMT
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| 244 | #undef VENDOR_RELEASE_ARGS
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| 245 | #undef VENDOR_PRODUCT_FMT
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| 246 | #undef VENDOR_PRODUCT_ARGS
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| 247 | #undef VENDOR_ONLY_FMT
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| 248 | #undef VENDOR_ONLY_ARGS
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| 249 |
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| 250 | return EOK;
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| 251 | }
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| 252 |
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| 253 | /** Create DDF match ids from USB device descriptor.
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| 254 | *
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| 255 | * @param matches List of match ids to extend.
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| 256 | * @param device_descriptor Device descriptor returned by given device.
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| 257 | * @return Error code.
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| 258 | */
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| 259 | int usb_device_create_match_ids_from_device_descriptor(
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| 260 | const usb_standard_device_descriptor_t *device_descriptor,
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| 261 | match_id_list_t *matches)
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| 262 | {
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| 263 | /*
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| 264 | * Unless the vendor id is 0, the pair idVendor-idProduct
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| 265 | * quite uniquely describes the device.
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| 266 | */
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| 267 | if (device_descriptor->vendor_id != 0) {
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| 268 | /* First, with release number. */
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| 269 | ADD_MATCHID_OR_RETURN(matches, 100,
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| 270 | "usb&vendor=0x%04x&product=0x%04x&release=" BCD_FMT,
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| 271 | (int) device_descriptor->vendor_id,
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| 272 | (int) device_descriptor->product_id,
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| 273 | BCD_ARGS(device_descriptor->device_version));
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| 274 |
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| 275 | /* Next, without release number. */
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| 276 | ADD_MATCHID_OR_RETURN(matches, 90,
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| 277 | "usb&vendor=0x%04x&product=0x%04x",
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| 278 | (int) device_descriptor->vendor_id,
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| 279 | (int) device_descriptor->product_id);
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| 280 | }
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| 281 |
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| 282 | /*
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| 283 | * If the device class points to interface we skip adding
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| 284 | * class directly but we add a multi interface device.
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| 285 | */
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| 286 | if (device_descriptor->device_class != USB_CLASS_USE_INTERFACE) {
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| 287 | ADD_MATCHID_OR_RETURN(matches, 50, "usb&class=%s",
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| 288 | usb_str_class(device_descriptor->device_class));
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| 289 | } else {
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| 290 | ADD_MATCHID_OR_RETURN(matches, 50, "usb&mid");
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| 291 | }
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| 292 |
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| 293 | /* As a last resort, try fallback driver. */
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| 294 | ADD_MATCHID_OR_RETURN(matches, 10, "usb&fallback");
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| 295 |
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| 296 | return EOK;
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| 297 | }
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| 298 |
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| 299 |
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| 300 | /** Create match ids describing attached device.
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| 301 | *
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| 302 | * @warning The list of match ids @p matches may change even when
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| 303 | * function exits with error.
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| 304 | *
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| 305 | * @param ctrl_pipe Control pipe to given device (session must be already
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| 306 | * started).
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| 307 | * @param matches Initialized list of match ids.
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| 308 | * @return Error code.
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| 309 | */
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| 310 | int usb_device_create_match_ids(usb_endpoint_pipe_t *ctrl_pipe,
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| 311 | match_id_list_t *matches)
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| 312 | {
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| 313 | int rc;
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| 314 | /*
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| 315 | * Retrieve device descriptor and add matches from it.
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| 316 | */
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| 317 | usb_standard_device_descriptor_t device_descriptor;
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| 318 |
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| 319 | rc = usb_request_get_device_descriptor(ctrl_pipe, &device_descriptor);
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| 320 | if (rc != EOK) {
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| 321 | return rc;
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| 322 | }
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| 323 |
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| 324 | rc = usb_device_create_match_ids_from_device_descriptor(
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| 325 | &device_descriptor, matches);
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| 326 | if (rc != EOK) {
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| 327 | return rc;
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| 328 | }
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| 329 |
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| 330 | return EOK;
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| 331 | }
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| 332 |
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| 333 | /** Probe for device kind and register it in devman.
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| 334 | *
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| 335 | * @param[in] address Address of the (unknown) attached device.
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| 336 | * @param[in] hc_handle Handle of the host controller.
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| 337 | * @param[in] parent Parent device.
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| 338 | * @param[out] child_handle Handle of the child device.
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| 339 | * @param[in] dev_ops Child device ops.
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| 340 | * @param[in] dev_data Arbitrary pointer to be stored in the child
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| 341 | * as @c driver_data.
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| 342 | * @param[out] child_fun Storage where pointer to allocated child function
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| 343 | * will be written.
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| 344 | * @return Error code.
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| 345 | */
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| 346 | int usb_device_register_child_in_devman(usb_address_t address,
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| 347 | devman_handle_t hc_handle,
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| 348 | ddf_dev_t *parent, devman_handle_t *child_handle,
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| 349 | ddf_dev_ops_t *dev_ops, void *dev_data, ddf_fun_t **child_fun)
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| 350 | {
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| 351 | size_t this_device_name_index;
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| 352 |
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| 353 | fibril_mutex_lock(&device_name_index_mutex);
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| 354 | this_device_name_index = device_name_index;
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| 355 | device_name_index++;
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| 356 | fibril_mutex_unlock(&device_name_index_mutex);
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| 357 |
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| 358 | ddf_fun_t *child = NULL;
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| 359 | char *child_name = NULL;
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| 360 | int rc;
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| 361 | usb_device_connection_t dev_connection;
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| 362 | usb_endpoint_pipe_t ctrl_pipe;
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| 363 |
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| 364 | rc = usb_device_connection_initialize(&dev_connection, hc_handle, address);
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| 365 | if (rc != EOK) {
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| 366 | goto failure;
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| 367 | }
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| 368 |
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| 369 | rc = usb_endpoint_pipe_initialize_default_control(&ctrl_pipe,
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| 370 | &dev_connection);
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| 371 | if (rc != EOK) {
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| 372 | goto failure;
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| 373 | }
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| 374 | rc = usb_endpoint_pipe_probe_default_control(&ctrl_pipe);
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| 375 | if (rc != EOK) {
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| 376 | goto failure;
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| 377 | }
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| 378 |
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| 379 | /*
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| 380 | * TODO: Once the device driver framework support persistent
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| 381 | * naming etc., something more descriptive could be created.
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| 382 | */
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| 383 | rc = asprintf(&child_name, "usb%02zu_a%d",
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| 384 | this_device_name_index, address);
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| 385 | if (rc < 0) {
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| 386 | goto failure;
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| 387 | }
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| 388 |
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| 389 | child = ddf_fun_create(parent, fun_inner, child_name);
|
|---|
| 390 | if (child == NULL) {
|
|---|
| 391 | rc = ENOMEM;
|
|---|
| 392 | goto failure;
|
|---|
| 393 | }
|
|---|
| 394 |
|
|---|
| 395 | if (dev_ops != NULL) {
|
|---|
| 396 | child->ops = dev_ops;
|
|---|
| 397 | } else {
|
|---|
| 398 | child->ops = &child_ops;
|
|---|
| 399 | }
|
|---|
| 400 |
|
|---|
| 401 | child->driver_data = dev_data;
|
|---|
| 402 |
|
|---|
| 403 | rc = usb_endpoint_pipe_start_session(&ctrl_pipe);
|
|---|
| 404 | if (rc != EOK) {
|
|---|
| 405 | goto failure;
|
|---|
| 406 | }
|
|---|
| 407 |
|
|---|
| 408 | rc = usb_device_create_match_ids(&ctrl_pipe, &child->match_ids);
|
|---|
| 409 | if (rc != EOK) {
|
|---|
| 410 | goto failure;
|
|---|
| 411 | }
|
|---|
| 412 |
|
|---|
| 413 | rc = usb_endpoint_pipe_end_session(&ctrl_pipe);
|
|---|
| 414 | if (rc != EOK) {
|
|---|
| 415 | goto failure;
|
|---|
| 416 | }
|
|---|
| 417 |
|
|---|
| 418 | rc = ddf_fun_bind(child);
|
|---|
| 419 | if (rc != EOK) {
|
|---|
| 420 | goto failure;
|
|---|
| 421 | }
|
|---|
| 422 |
|
|---|
| 423 | if (child_handle != NULL) {
|
|---|
| 424 | *child_handle = child->handle;
|
|---|
| 425 | }
|
|---|
| 426 |
|
|---|
| 427 | if (child_fun != NULL) {
|
|---|
| 428 | *child_fun = child;
|
|---|
| 429 | }
|
|---|
| 430 |
|
|---|
| 431 | return EOK;
|
|---|
| 432 |
|
|---|
| 433 | failure:
|
|---|
| 434 | if (child != NULL) {
|
|---|
| 435 | child->name = NULL;
|
|---|
| 436 | /* This takes care of match_id deallocation as well. */
|
|---|
| 437 | ddf_fun_destroy(child);
|
|---|
| 438 | }
|
|---|
| 439 | if (child_name != NULL) {
|
|---|
| 440 | free(child_name);
|
|---|
| 441 | }
|
|---|
| 442 |
|
|---|
| 443 | return rc;
|
|---|
| 444 | }
|
|---|
| 445 |
|
|---|
| 446 |
|
|---|
| 447 | /**
|
|---|
| 448 | * @}
|
|---|
| 449 | */
|
|---|
