LXR qemu/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 */
  51static 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
  96USBDevice *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
 134fail:
 135    object_unparent(OBJECT(dev));
 136    return NULL;
 137}
 138
 139static void usb_host_register_types(void)
 140{
 141    usb_legacy_register("usb-host", "host", usb_host_device_open);
 142}
 143
 144type_init(usb_host_register_types)
 145