02a5c4c974
The qdev_free() function name is misleading since all the function does is unlink the device from its parent. The device is not necessarily freed. The device will be freed when its QObject refcount reaches zero. It is usual for the parent (bus) to hold the final reference but there are cases where something else holds a reference so "free" is a misleading name. Call object_unparent(obj) directly instead of having a qdev wrapper function. Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Andreas Färber <afaerber@suse.de>
145 lines
4.2 KiB
C
145 lines
4.2 KiB
C
/*
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* Linux host USB redirector
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*
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* Copyright (c) 2005 Fabrice Bellard
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*
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* Copyright (c) 2008 Max Krasnyansky
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* Support for host device auto connect & disconnect
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* Major rewrite to support fully async operation
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*
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* Copyright 2008 TJ <linux@tjworld.net>
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* Added flexible support for /dev/bus/usb /sys/bus/usb/devices in addition
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* to the legacy /proc/bus/usb USB device discovery and handling
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "qemu-common.h"
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#include "hw/usb.h"
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#include "hw/usb/host.h"
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/*
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* Autoconnect filter
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* Format:
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* auto:bus:dev[:vid:pid]
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* auto:bus.dev[:vid:pid]
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*
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* bus - bus number (dec, * means any)
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* dev - device number (dec, * means any)
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* vid - vendor id (hex, * means any)
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* pid - product id (hex, * means any)
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*
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* See 'lsusb' output.
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*/
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static int parse_filter(const char *spec, struct USBAutoFilter *f)
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{
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enum { BUS, DEV, VID, PID, DONE };
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const char *p = spec;
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int i;
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f->bus_num = 0;
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f->addr = 0;
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f->vendor_id = 0;
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f->product_id = 0;
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for (i = BUS; i < DONE; i++) {
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p = strpbrk(p, ":.");
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if (!p) {
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break;
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}
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p++;
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if (*p == '*') {
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continue;
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}
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switch (i) {
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case BUS:
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f->bus_num = strtol(p, NULL, 10);
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break;
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case DEV:
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f->addr = strtol(p, NULL, 10);
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break;
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case VID:
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f->vendor_id = strtol(p, NULL, 16);
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break;
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case PID:
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f->product_id = strtol(p, NULL, 16);
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break;
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}
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}
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if (i < DEV) {
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fprintf(stderr, "husb: invalid auto filter spec %s\n", spec);
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return -1;
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}
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return 0;
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}
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USBDevice *usb_host_device_open(USBBus *bus, const char *devname)
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{
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struct USBAutoFilter filter;
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USBDevice *dev;
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char *p;
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dev = usb_create(bus, "usb-host");
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if (strstr(devname, "auto:")) {
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if (parse_filter(devname, &filter) < 0) {
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goto fail;
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}
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} else {
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p = strchr(devname, '.');
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if (p) {
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filter.bus_num = strtoul(devname, NULL, 0);
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filter.addr = strtoul(p + 1, NULL, 0);
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filter.vendor_id = 0;
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filter.product_id = 0;
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} else {
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p = strchr(devname, ':');
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if (p) {
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filter.bus_num = 0;
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filter.addr = 0;
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filter.vendor_id = strtoul(devname, NULL, 16);
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filter.product_id = strtoul(p + 1, NULL, 16);
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} else {
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goto fail;
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}
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}
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}
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qdev_prop_set_uint32(&dev->qdev, "hostbus", filter.bus_num);
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qdev_prop_set_uint32(&dev->qdev, "hostaddr", filter.addr);
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qdev_prop_set_uint32(&dev->qdev, "vendorid", filter.vendor_id);
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qdev_prop_set_uint32(&dev->qdev, "productid", filter.product_id);
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qdev_init_nofail(&dev->qdev);
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return dev;
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fail:
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object_unparent(OBJECT(dev));
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return NULL;
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}
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static void usb_host_register_types(void)
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{
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usb_legacy_register("usb-host", "host", usb_host_device_open);
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}
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type_init(usb_host_register_types)
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