hw/usb/host-legacy.c

   1 /*
   2  * Linux host USB redirector
   3  *
   4  * Copyright (c) 2005 Fabrice Bellard
   5  *
   6  * Copyright (c) 2008 Max Krasnyansky
   7  *      Support for host device auto connect & disconnect
   8  *      Major rewrite to support fully async operation
   9  *
  10  * Copyright 2008 TJ <linux@tjworld.net>
  11  *      Added flexible support for /dev/bus/usb /sys/bus/usb/devices in addition
  12  *      to the legacy /proc/bus/usb USB device discovery and handling
  13  *
  14  * Permission is hereby granted, free of charge, to any person obtaining a copy
  15  * of this software and associated documentation files (the "Software"), to deal
  16  * in the Software without restriction, including without limitation the rights
  17  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  18  * copies of the Software, and to permit persons to whom the Software is
  19  * furnished to do so, subject to the following conditions:
  20  *
  21  * The above copyright notice and this permission notice shall be included in
  22  * all copies or substantial portions of the Software.
  23  *
  24  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  25  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  26  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  27  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  28  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  29  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  30  * THE SOFTWARE.
  31  */
  32
  33 #include "qemu/osdep.h"
  34 #include "qemu-common.h"
  35 #include "hw/usb.h"
  36 #include "hw/usb/host.h"
  37
  38 /*
  39  * Autoconnect filter
  40  * Format:
  41  *    auto:bus:dev[:vid:pid]
  42  *    auto:bus.dev[:vid:pid]
  43  *
  44  *    bus  - bus number    (dec, * means any)
  45  *    dev  - device number (dec, * means any)
  46  *    vid  - vendor id     (hex, * means any)
  47  *    pid  - product id    (hex, * means any)
  48  *
  49  *    See 'lsusb' output.
  50  */
  51 static int parse_filter(const char *spec, struct USBAutoFilter *f)
  52 {
  53     enum { BUS, DEV, VID, PID, DONE };
  54     const char *p = spec;
  55     int i;
  56
  57     f->bus_num    = 0;
  58     f->addr       = 0;
  59     f->vendor_id  = 0;
  60     f->product_id = 0;
  61
  62     for (i = BUS; i < DONE; i++) {
  63         p = strpbrk(p, ":.");
  64         if (!p) {
  65             break;
  66         }
  67         p++;
  68
  69         if (*p == '*') {
  70             continue;
  71         }
  72         switch (i) {
  73         case BUS:
  74             f->bus_num = strtol(p, NULL, 10);
  75             break;
  76         case DEV:
  77             f->addr    = strtol(p, NULL, 10);
  78             break;
  79         case VID:
  80             f->vendor_id  = strtol(p, NULL, 16);
  81             break;
  82         case PID:
  83             f->product_id = strtol(p, NULL, 16);
  84             break;
  85         }
  86     }
  87
  88     if (i < DEV) {
  89         fprintf(stderr, "husb: invalid auto filter spec %s\n", spec);
  90         return -1;
  91     }
  92
  93     return 0;
  94 }
  95
  96 USBDevice *usb_host_device_open(USBBus *bus, const char *devname)
  97 {
  98     struct USBAutoFilter filter;
  99     USBDevice *dev;
 100     char *p;
 101
 102     dev = usb_create(bus, "usb-host");
 103
 104     if (strstr(devname, "auto:")) {
 105         if (parse_filter(devname, &filter) < 0) {
 106             goto fail;
 107         }
 108     } else {
 109         p = strchr(devname, '.');
 110         if (p) {
 111             filter.bus_num    = strtoul(devname, NULL, 0);
 112             filter.addr       = strtoul(p + 1, NULL, 0);
 113             filter.vendor_id  = 0;
 114             filter.product_id = 0;
 115         } else {
 116             p = strchr(devname, ':');
 117             if (p) {
 118                 filter.bus_num    = 0;
 119                 filter.addr       = 0;
 120                 filter.vendor_id  = strtoul(devname, NULL, 16);
 121                 filter.product_id = strtoul(p + 1, NULL, 16);
 122             } else {
 123                 goto fail;
 124             }
 125         }
 126     }
 127
 128     qdev_prop_set_uint32(&dev->qdev, "hostbus",   filter.bus_num);
 129     qdev_prop_set_uint32(&dev->qdev, "hostaddr",  filter.addr);
 130     qdev_prop_set_uint32(&dev->qdev, "vendorid",  filter.vendor_id);
 131     qdev_prop_set_uint32(&dev->qdev, "productid", filter.product_id);
 132     return dev;
 133
 134 fail:
 135     object_unparent(OBJECT(dev));
 136     return NULL;
 137 }
 138
 139 static void usb_host_register_types(void)
 140 {
 141     usb_legacy_register("usb-host", "host", usb_host_device_open);
 142 }
 143
 144 type_init(usb_host_register_types)