3 * Copyright (c) 2016 Hans Petter Selasky. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 #ifdef LIBUSB_GLOBAL_INCLUDE_FILE
28 #include LIBUSB_GLOBAL_INCLUDE_FILE
39 #include <sys/fcntl.h>
40 #include <sys/ioctl.h>
41 #include <sys/queue.h>
42 #include <sys/endian.h>
45 #define libusb_device_handle libusb20_device
48 #include "libusb20_desc.h"
49 #include "libusb20_int.h"
54 libusb_hotplug_equal(libusb_device *_adev, libusb_device *_bdev)
56 struct libusb20_device *adev = _adev->os_priv;
57 struct libusb20_device *bdev = _bdev->os_priv;
59 if (adev->bus_number != bdev->bus_number)
61 if (adev->device_address != bdev->device_address)
63 if (memcmp(&adev->ddesc, &bdev->ddesc, sizeof(adev->ddesc)))
65 if (memcmp(&adev->session_data, &bdev->session_data, sizeof(adev->session_data)))
71 libusb_hotplug_filter(libusb_context *ctx, libusb_hotplug_callback_handle pcbh,
72 libusb_device *dev, libusb_hotplug_event event)
74 if (!(pcbh->events & event))
76 if (pcbh->vendor != LIBUSB_HOTPLUG_MATCH_ANY &&
77 pcbh->vendor != libusb20_dev_get_device_desc(dev->os_priv)->idVendor)
79 if (pcbh->product != LIBUSB_HOTPLUG_MATCH_ANY &&
80 pcbh->product != libusb20_dev_get_device_desc(dev->os_priv)->idProduct)
82 if (pcbh->devclass != LIBUSB_HOTPLUG_MATCH_ANY &&
83 pcbh->devclass != libusb20_dev_get_device_desc(dev->os_priv)->bDeviceClass)
85 return (pcbh->fn(ctx, dev, event, pcbh->user_data));
89 libusb_hotplug_scan(void *arg)
91 TAILQ_HEAD(, libusb_device) hotplug_devs;
92 libusb_hotplug_callback_handle acbh;
93 libusb_hotplug_callback_handle bcbh;
94 libusb_context *ctx = arg;
95 libusb_device **ppdev;
108 TAILQ_INIT(&hotplug_devs);
110 if (ctx->hotplug_handler != NO_THREAD) {
111 count = libusb_get_device_list(ctx, &ppdev);
114 for (x = 0; x != count; x++) {
115 TAILQ_INSERT_TAIL(&hotplug_devs, ppdev[x],
118 libusb_free_device_list(ppdev, 0);
123 /* figure out which devices are gone */
124 TAILQ_FOREACH_SAFE(adev, &ctx->hotplug_devs, hotplug_entry, temp) {
125 TAILQ_FOREACH(bdev, &hotplug_devs, hotplug_entry) {
126 if (libusb_hotplug_equal(adev, bdev))
130 TAILQ_REMOVE(&ctx->hotplug_devs, adev, hotplug_entry);
131 TAILQ_FOREACH_SAFE(acbh, &ctx->hotplug_cbh, entry, bcbh) {
132 if (libusb_hotplug_filter(ctx, acbh, adev,
133 LIBUSB_HOTPLUG_EVENT_DEVICE_LEFT) == 0)
135 TAILQ_REMOVE(&ctx->hotplug_cbh, acbh, entry);
138 libusb_unref_device(adev);
142 /* figure out which devices are new */
143 TAILQ_FOREACH_SAFE(adev, &hotplug_devs, hotplug_entry, temp) {
144 TAILQ_FOREACH(bdev, &ctx->hotplug_devs, hotplug_entry) {
145 if (libusb_hotplug_equal(adev, bdev))
149 TAILQ_REMOVE(&hotplug_devs, adev, hotplug_entry);
150 TAILQ_INSERT_TAIL(&ctx->hotplug_devs, adev, hotplug_entry);
151 TAILQ_FOREACH_SAFE(acbh, &ctx->hotplug_cbh, entry, bcbh) {
152 if (libusb_hotplug_filter(ctx, acbh, adev,
153 LIBUSB_HOTPLUG_EVENT_DEVICE_ARRIVED) == 0)
155 TAILQ_REMOVE(&ctx->hotplug_cbh, acbh, entry);
162 /* unref remaining devices */
163 while ((adev = TAILQ_FIRST(&hotplug_devs)) != NULL) {
164 TAILQ_REMOVE(&hotplug_devs, adev, hotplug_entry);
165 libusb_unref_device(adev);
171 int libusb_hotplug_register_callback(libusb_context *ctx,
172 libusb_hotplug_event events, libusb_hotplug_flag flags,
173 int vendor_id, int product_id, int dev_class,
174 libusb_hotplug_callback_fn cb_fn, void *user_data,
175 libusb_hotplug_callback_handle *phandle)
177 libusb_hotplug_callback_handle handle;
178 struct libusb_device *adev;
180 ctx = GET_CONTEXT(ctx);
182 if (ctx == NULL || cb_fn == NULL || events == 0 ||
183 vendor_id < -1 || vendor_id > 0xffff ||
184 product_id < -1 || product_id > 0xffff ||
185 dev_class < -1 || dev_class > 0xff)
186 return (LIBUSB_ERROR_INVALID_PARAM);
188 handle = malloc(sizeof(*handle));
190 return (LIBUSB_ERROR_NO_MEM);
193 if (ctx->hotplug_handler == NO_THREAD) {
194 if (pthread_create(&ctx->hotplug_handler, NULL,
195 &libusb_hotplug_scan, ctx) != 0)
196 ctx->hotplug_handler = NO_THREAD;
198 handle->events = events;
199 handle->vendor = vendor_id;
200 handle->product = product_id;
201 handle->devclass = dev_class;
203 handle->user_data = user_data;
205 if (flags & LIBUSB_HOTPLUG_ENUMERATE) {
206 TAILQ_FOREACH(adev, &ctx->hotplug_devs, hotplug_entry) {
207 if (libusb_hotplug_filter(ctx, handle, adev,
208 LIBUSB_HOTPLUG_EVENT_DEVICE_ARRIVED) == 0)
216 TAILQ_INSERT_TAIL(&ctx->hotplug_cbh, handle, entry);
221 return (LIBUSB_SUCCESS);
224 void libusb_hotplug_deregister_callback(libusb_context *ctx,
225 libusb_hotplug_callback_handle handle)
227 ctx = GET_CONTEXT(ctx);
229 if (ctx == NULL || handle == NULL)
233 TAILQ_REMOVE(&ctx->hotplug_cbh, handle, entry);