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645 lines
21 KiB
C
645 lines
21 KiB
C
/*
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* libusb backend
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*
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* Copyright 2020 Zebediah Figura
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
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*/
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#if 0
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#pragma makedep unix
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#endif
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#include <stdarg.h>
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#include <stdbool.h>
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#include <stdlib.h>
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#include <libusb.h>
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#include <pthread.h>
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#include "ntstatus.h"
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#define WIN32_NO_STATUS
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#include "windef.h"
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#include "winternl.h"
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#include "ddk/wdm.h"
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#include "ddk/usb.h"
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#include "wine/debug.h"
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#include "wine/list.h"
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#include "unixlib.h"
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WINE_DEFAULT_DEBUG_CHANNEL(wineusb);
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struct unix_device
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{
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struct list entry;
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libusb_device_handle *handle;
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struct unix_device *parent;
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unsigned int refcount;
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};
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static libusb_hotplug_callback_handle hotplug_cb_handle;
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static volatile bool thread_shutdown;
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static struct usb_event *usb_events;
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static size_t usb_event_count, usb_events_capacity;
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static pthread_mutex_t device_mutex = PTHREAD_MUTEX_INITIALIZER;
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static struct list device_list = LIST_INIT(device_list);
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static bool array_reserve(void **elements, size_t *capacity, size_t count, size_t size)
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{
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unsigned int new_capacity, max_capacity;
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void *new_elements;
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if (count <= *capacity)
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return true;
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max_capacity = ~(size_t)0 / size;
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if (count > max_capacity)
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return false;
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new_capacity = max(4, *capacity);
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while (new_capacity < count && new_capacity <= max_capacity / 2)
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new_capacity *= 2;
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if (new_capacity < count)
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new_capacity = max_capacity;
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if (!(new_elements = realloc(*elements, new_capacity * size)))
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return false;
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*elements = new_elements;
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*capacity = new_capacity;
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return true;
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}
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static void queue_event(const struct usb_event *event)
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{
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if (array_reserve((void **)&usb_events, &usb_events_capacity, usb_event_count + 1, sizeof(*usb_events)))
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usb_events[usb_event_count++] = *event;
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else
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ERR("Failed to queue event.\n");
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}
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static bool get_event(struct usb_event *event)
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{
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if (!usb_event_count) return false;
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*event = usb_events[0];
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if (--usb_event_count)
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memmove(usb_events, usb_events + 1, usb_event_count * sizeof(*usb_events));
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return true;
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}
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static void add_usb_device(libusb_device *libusb_device)
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{
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struct libusb_config_descriptor *config_desc;
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struct libusb_device_descriptor device_desc;
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struct unix_device *unix_device;
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struct usb_event usb_event;
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int ret;
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libusb_get_device_descriptor(libusb_device, &device_desc);
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TRACE("Adding new device %p, vendor %04x, product %04x.\n", libusb_device,
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device_desc.idVendor, device_desc.idProduct);
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if (!(unix_device = calloc(1, sizeof(*unix_device))))
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return;
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if ((ret = libusb_open(libusb_device, &unix_device->handle)))
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{
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WARN("Failed to open device: %s\n", libusb_strerror(ret));
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free(unix_device);
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return;
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}
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unix_device->refcount = 1;
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pthread_mutex_lock(&device_mutex);
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list_add_tail(&device_list, &unix_device->entry);
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pthread_mutex_unlock(&device_mutex);
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usb_event.type = USB_EVENT_ADD_DEVICE;
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usb_event.u.added_device.device = unix_device;
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usb_event.u.added_device.vendor = device_desc.idVendor;
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usb_event.u.added_device.product = device_desc.idProduct;
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usb_event.u.added_device.revision = device_desc.bcdDevice;
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usb_event.u.added_device.usbver = device_desc.bcdUSB;
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usb_event.u.added_device.class = device_desc.bDeviceClass;
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usb_event.u.added_device.subclass = device_desc.bDeviceSubClass;
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usb_event.u.added_device.protocol = device_desc.bDeviceProtocol;
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usb_event.u.added_device.busnum = libusb_get_bus_number(libusb_device);
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usb_event.u.added_device.portnum = libusb_get_port_number(libusb_device);
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usb_event.u.added_device.interface = false;
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usb_event.u.added_device.interface_index = -1;
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if (!(ret = libusb_get_active_config_descriptor(libusb_device, &config_desc)))
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{
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const struct libusb_interface *interface;
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const struct libusb_interface_descriptor *iface_desc;
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if (config_desc->bNumInterfaces == 1)
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{
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interface = &config_desc->interface[0];
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if (interface->num_altsetting != 1)
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FIXME("Interface 0 has %u alternate settings; using the first one.\n",
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interface->num_altsetting);
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iface_desc = &interface->altsetting[0];
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usb_event.u.added_device.class = iface_desc->bInterfaceClass;
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usb_event.u.added_device.subclass = iface_desc->bInterfaceSubClass;
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usb_event.u.added_device.protocol = iface_desc->bInterfaceProtocol;
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usb_event.u.added_device.interface_index = iface_desc->bInterfaceNumber;
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}
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queue_event(&usb_event);
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/* Create new devices for interfaces of composite devices.
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*
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* On Windows this is the job of usbccgp.sys, a separate driver that
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* layers on top of the base USB driver. While we could take this
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* approach as well, implementing usbccgp is a lot more work, whereas
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* interface support is effectively built into libusb.
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*
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* FIXME: usbccgp does not create separate interfaces in some cases,
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* e.g. when there is an interface association descriptor available.
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*/
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if (config_desc->bNumInterfaces > 1)
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{
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uint8_t i;
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for (i = 0; i < config_desc->bNumInterfaces; ++i)
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{
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struct unix_device *unix_iface;
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interface = &config_desc->interface[i];
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if (interface->num_altsetting != 1)
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FIXME("Interface %u has %u alternate settings; using the first one.\n",
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i, interface->num_altsetting);
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iface_desc = &interface->altsetting[0];
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if (!(unix_iface = calloc(1, sizeof(*unix_iface))))
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return;
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++unix_device->refcount;
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unix_iface->refcount = 1;
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unix_iface->handle = unix_device->handle;
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unix_iface->parent = unix_device;
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pthread_mutex_lock(&device_mutex);
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list_add_tail(&device_list, &unix_iface->entry);
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pthread_mutex_unlock(&device_mutex);
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usb_event.u.added_device.device = unix_iface;
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usb_event.u.added_device.class = iface_desc->bInterfaceClass;
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usb_event.u.added_device.subclass = iface_desc->bInterfaceSubClass;
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usb_event.u.added_device.protocol = iface_desc->bInterfaceProtocol;
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usb_event.u.added_device.interface = true;
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usb_event.u.added_device.interface_index = iface_desc->bInterfaceNumber;
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queue_event(&usb_event);
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}
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}
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libusb_free_config_descriptor(config_desc);
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}
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else
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{
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queue_event(&usb_event);
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ERR("Failed to get configuration descriptor: %s\n", libusb_strerror(ret));
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}
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}
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static void remove_usb_device(libusb_device *libusb_device)
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{
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struct unix_device *unix_device;
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struct usb_event usb_event;
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TRACE("Removing device %p.\n", libusb_device);
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LIST_FOR_EACH_ENTRY(unix_device, &device_list, struct unix_device, entry)
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{
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if (libusb_get_device(unix_device->handle) == libusb_device)
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{
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usb_event.type = USB_EVENT_REMOVE_DEVICE;
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usb_event.u.removed_device = unix_device;
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queue_event(&usb_event);
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}
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}
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}
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static int LIBUSB_CALL hotplug_cb(libusb_context *context, libusb_device *device,
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libusb_hotplug_event event, void *user_data)
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{
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if (event == LIBUSB_HOTPLUG_EVENT_DEVICE_ARRIVED)
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add_usb_device(device);
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else
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remove_usb_device(device);
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return 0;
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}
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static NTSTATUS usb_main_loop(void *args)
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{
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const struct usb_main_loop_params *params = args;
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int ret;
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while (!thread_shutdown)
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{
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if (get_event(params->event)) return STATUS_PENDING;
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if ((ret = libusb_handle_events(NULL)))
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ERR("Error handling events: %s\n", libusb_strerror(ret));
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}
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libusb_exit(NULL);
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free(usb_events);
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usb_events = NULL;
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usb_event_count = usb_events_capacity = 0;
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thread_shutdown = false;
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TRACE("USB main loop exiting.\n");
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return STATUS_SUCCESS;
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}
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static NTSTATUS usb_init(void *args)
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{
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int ret;
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if ((ret = libusb_init(NULL)))
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{
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ERR("Failed to initialize libusb: %s\n", libusb_strerror(ret));
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return STATUS_UNSUCCESSFUL;
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}
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if ((ret = libusb_hotplug_register_callback(NULL,
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LIBUSB_HOTPLUG_EVENT_DEVICE_ARRIVED | LIBUSB_HOTPLUG_EVENT_DEVICE_LEFT,
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LIBUSB_HOTPLUG_ENUMERATE, LIBUSB_HOTPLUG_MATCH_ANY, LIBUSB_HOTPLUG_MATCH_ANY,
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LIBUSB_HOTPLUG_MATCH_ANY, hotplug_cb, NULL, &hotplug_cb_handle)))
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{
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ERR("Failed to register callback: %s\n", libusb_strerror(ret));
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libusb_exit(NULL);
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return STATUS_UNSUCCESSFUL;
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}
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return STATUS_SUCCESS;
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}
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static NTSTATUS usb_exit(void *args)
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{
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libusb_hotplug_deregister_callback(NULL, hotplug_cb_handle);
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thread_shutdown = true;
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libusb_interrupt_event_handler(NULL);
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return STATUS_SUCCESS;
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}
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static NTSTATUS usbd_status_from_libusb(enum libusb_transfer_status status)
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{
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switch (status)
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{
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case LIBUSB_TRANSFER_CANCELLED:
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return USBD_STATUS_CANCELED;
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case LIBUSB_TRANSFER_COMPLETED:
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return USBD_STATUS_SUCCESS;
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case LIBUSB_TRANSFER_NO_DEVICE:
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return USBD_STATUS_DEVICE_GONE;
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case LIBUSB_TRANSFER_STALL:
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return USBD_STATUS_ENDPOINT_HALTED;
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case LIBUSB_TRANSFER_TIMED_OUT:
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return USBD_STATUS_TIMEOUT;
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default:
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FIXME("Unhandled status %#x.\n", status);
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case LIBUSB_TRANSFER_ERROR:
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return USBD_STATUS_REQUEST_FAILED;
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}
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}
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struct transfer_ctx
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{
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IRP *irp;
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void *transfer_buffer;
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};
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static void LIBUSB_CALL transfer_cb(struct libusb_transfer *transfer)
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{
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struct transfer_ctx *transfer_ctx = transfer->user_data;
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IRP *irp = transfer_ctx->irp;
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URB *urb = IoGetCurrentIrpStackLocation(irp)->Parameters.Others.Argument1;
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unsigned char *transfer_buffer = transfer_ctx->transfer_buffer;
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struct usb_event event;
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TRACE("Completing IRP %p, status %#x.\n", irp, transfer->status);
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free(transfer_ctx);
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urb->UrbHeader.Status = usbd_status_from_libusb(transfer->status);
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if (transfer->status == LIBUSB_TRANSFER_COMPLETED)
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{
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switch (urb->UrbHeader.Function)
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{
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case URB_FUNCTION_BULK_OR_INTERRUPT_TRANSFER:
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urb->UrbBulkOrInterruptTransfer.TransferBufferLength = transfer->actual_length;
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break;
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case URB_FUNCTION_GET_DESCRIPTOR_FROM_DEVICE:
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{
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struct _URB_CONTROL_DESCRIPTOR_REQUEST *req = &urb->UrbControlDescriptorRequest;
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req->TransferBufferLength = transfer->actual_length;
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memcpy(transfer_buffer, libusb_control_transfer_get_data(transfer), transfer->actual_length);
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break;
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}
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case URB_FUNCTION_VENDOR_INTERFACE:
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{
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struct _URB_CONTROL_VENDOR_OR_CLASS_REQUEST *req = &urb->UrbControlVendorClassRequest;
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req->TransferBufferLength = transfer->actual_length;
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if (req->TransferFlags & USBD_TRANSFER_DIRECTION_IN)
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memcpy(transfer_buffer, libusb_control_transfer_get_data(transfer), transfer->actual_length);
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break;
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}
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default:
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ERR("Unexpected function %#x.\n", urb->UrbHeader.Function);
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}
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}
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event.type = USB_EVENT_TRANSFER_COMPLETE;
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event.u.completed_irp = irp;
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queue_event(&event);
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}
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struct pipe
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{
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unsigned char endpoint;
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unsigned char type;
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};
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static HANDLE make_pipe_handle(unsigned char endpoint, USBD_PIPE_TYPE type)
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{
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union
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{
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struct pipe pipe;
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HANDLE handle;
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} u;
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u.pipe.endpoint = endpoint;
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u.pipe.type = type;
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return u.handle;
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}
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static struct pipe get_pipe(HANDLE handle)
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{
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union
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{
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struct pipe pipe;
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HANDLE handle;
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} u;
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u.handle = handle;
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return u.pipe;
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}
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static NTSTATUS usb_submit_urb(void *args)
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{
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const struct usb_submit_urb_params *params = args;
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IRP *irp = params->irp;
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URB *urb = IoGetCurrentIrpStackLocation(irp)->Parameters.Others.Argument1;
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libusb_device_handle *handle = params->device->handle;
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struct libusb_transfer *transfer;
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int ret;
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TRACE("type %#x.\n", urb->UrbHeader.Function);
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switch (urb->UrbHeader.Function)
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{
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case URB_FUNCTION_SYNC_RESET_PIPE_AND_CLEAR_STALL:
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{
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struct _URB_PIPE_REQUEST *req = &urb->UrbPipeRequest;
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struct pipe pipe = get_pipe(req->PipeHandle);
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if ((ret = libusb_clear_halt(handle, pipe.endpoint)) < 0)
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ERR("Failed to clear halt: %s\n", libusb_strerror(ret));
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return STATUS_SUCCESS;
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}
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case URB_FUNCTION_BULK_OR_INTERRUPT_TRANSFER:
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{
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struct _URB_BULK_OR_INTERRUPT_TRANSFER *req = &urb->UrbBulkOrInterruptTransfer;
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struct pipe pipe = get_pipe(req->PipeHandle);
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struct transfer_ctx *transfer_ctx;
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if (!(transfer_ctx = calloc(1, sizeof(*transfer_ctx))))
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return STATUS_NO_MEMORY;
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transfer_ctx->irp = irp;
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transfer_ctx->transfer_buffer = params->transfer_buffer;
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if (!(transfer = libusb_alloc_transfer(0)))
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{
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free(transfer_ctx);
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return STATUS_NO_MEMORY;
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}
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irp->Tail.Overlay.DriverContext[0] = transfer;
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if (pipe.type == UsbdPipeTypeBulk)
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{
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libusb_fill_bulk_transfer(transfer, handle, pipe.endpoint,
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params->transfer_buffer, req->TransferBufferLength, transfer_cb, transfer_ctx, 0);
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}
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else if (pipe.type == UsbdPipeTypeInterrupt)
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{
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libusb_fill_interrupt_transfer(transfer, handle, pipe.endpoint,
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params->transfer_buffer, req->TransferBufferLength, transfer_cb, transfer_ctx, 0);
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}
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else
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{
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WARN("Invalid pipe type %#x.\n", pipe.type);
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free(transfer_ctx);
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libusb_free_transfer(transfer);
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return USBD_STATUS_INVALID_PIPE_HANDLE;
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}
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transfer->flags = LIBUSB_TRANSFER_FREE_TRANSFER;
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ret = libusb_submit_transfer(transfer);
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if (ret < 0)
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ERR("Failed to submit bulk transfer: %s\n", libusb_strerror(ret));
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return STATUS_PENDING;
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}
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case URB_FUNCTION_GET_DESCRIPTOR_FROM_DEVICE:
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{
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struct _URB_CONTROL_DESCRIPTOR_REQUEST *req = &urb->UrbControlDescriptorRequest;
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struct transfer_ctx *transfer_ctx;
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unsigned char *buffer;
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if (!(transfer_ctx = calloc(1, sizeof(*transfer_ctx))))
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return STATUS_NO_MEMORY;
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transfer_ctx->irp = irp;
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transfer_ctx->transfer_buffer = params->transfer_buffer;
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if (!(transfer = libusb_alloc_transfer(0)))
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{
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free(transfer_ctx);
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return STATUS_NO_MEMORY;
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}
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irp->Tail.Overlay.DriverContext[0] = transfer;
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if (!(buffer = malloc(sizeof(struct libusb_control_setup) + req->TransferBufferLength)))
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{
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free(transfer_ctx);
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libusb_free_transfer(transfer);
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return STATUS_NO_MEMORY;
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}
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libusb_fill_control_setup(buffer,
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LIBUSB_ENDPOINT_IN | LIBUSB_REQUEST_TYPE_STANDARD | LIBUSB_RECIPIENT_DEVICE,
|
|
LIBUSB_REQUEST_GET_DESCRIPTOR, (req->DescriptorType << 8) | req->Index,
|
|
req->LanguageId, req->TransferBufferLength);
|
|
libusb_fill_control_transfer(transfer, handle, buffer, transfer_cb, transfer_ctx, 0);
|
|
transfer->flags = LIBUSB_TRANSFER_FREE_BUFFER | LIBUSB_TRANSFER_FREE_TRANSFER;
|
|
ret = libusb_submit_transfer(transfer);
|
|
if (ret < 0)
|
|
ERR("Failed to submit GET_DESCRIPTOR transfer: %s\n", libusb_strerror(ret));
|
|
|
|
return STATUS_PENDING;
|
|
}
|
|
|
|
case URB_FUNCTION_SELECT_CONFIGURATION:
|
|
{
|
|
struct _URB_SELECT_CONFIGURATION *req = &urb->UrbSelectConfiguration;
|
|
ULONG i;
|
|
|
|
/* FIXME: In theory, we'd call libusb_set_configuration() here, but
|
|
* the CASIO FX-9750GII (which has only one configuration) goes into
|
|
* an error state if it receives a SET_CONFIGURATION request. Maybe
|
|
* we should skip setting that if and only if the configuration is
|
|
* already active? */
|
|
|
|
for (i = 0; i < req->Interface.NumberOfPipes; ++i)
|
|
{
|
|
USBD_PIPE_INFORMATION *pipe = &req->Interface.Pipes[i];
|
|
pipe->PipeHandle = make_pipe_handle(pipe->EndpointAddress, pipe->PipeType);
|
|
}
|
|
|
|
return STATUS_SUCCESS;
|
|
}
|
|
|
|
case URB_FUNCTION_VENDOR_INTERFACE:
|
|
{
|
|
struct _URB_CONTROL_VENDOR_OR_CLASS_REQUEST *req = &urb->UrbControlVendorClassRequest;
|
|
uint8_t req_type = LIBUSB_REQUEST_TYPE_VENDOR | LIBUSB_RECIPIENT_INTERFACE;
|
|
struct transfer_ctx *transfer_ctx;
|
|
unsigned char *buffer;
|
|
|
|
if (!(transfer_ctx = calloc(1, sizeof(*transfer_ctx))))
|
|
return STATUS_NO_MEMORY;
|
|
transfer_ctx->irp = irp;
|
|
transfer_ctx->transfer_buffer = params->transfer_buffer;
|
|
|
|
if (req->TransferFlags & USBD_TRANSFER_DIRECTION_IN)
|
|
req_type |= LIBUSB_ENDPOINT_IN;
|
|
if (req->TransferFlags & ~USBD_TRANSFER_DIRECTION_IN)
|
|
FIXME("Unhandled flags %#x.\n", (int)req->TransferFlags);
|
|
|
|
if (!(transfer = libusb_alloc_transfer(0)))
|
|
{
|
|
free(transfer_ctx);
|
|
return STATUS_NO_MEMORY;
|
|
}
|
|
irp->Tail.Overlay.DriverContext[0] = transfer;
|
|
|
|
if (!(buffer = malloc(sizeof(struct libusb_control_setup) + req->TransferBufferLength)))
|
|
{
|
|
free(transfer_ctx);
|
|
libusb_free_transfer(transfer);
|
|
return STATUS_NO_MEMORY;
|
|
}
|
|
|
|
libusb_fill_control_setup(buffer, req_type, req->Request,
|
|
req->Value, req->Index, req->TransferBufferLength);
|
|
if (!(req->TransferFlags & USBD_TRANSFER_DIRECTION_IN))
|
|
memcpy(buffer + LIBUSB_CONTROL_SETUP_SIZE, params->transfer_buffer, req->TransferBufferLength);
|
|
libusb_fill_control_transfer(transfer, handle, buffer, transfer_cb, transfer_ctx, 0);
|
|
transfer->flags = LIBUSB_TRANSFER_FREE_BUFFER | LIBUSB_TRANSFER_FREE_TRANSFER;
|
|
ret = libusb_submit_transfer(transfer);
|
|
if (ret < 0)
|
|
ERR("Failed to submit vendor-specific interface transfer: %s\n", libusb_strerror(ret));
|
|
|
|
return STATUS_PENDING;
|
|
}
|
|
|
|
default:
|
|
FIXME("Unhandled function %#x.\n", urb->UrbHeader.Function);
|
|
}
|
|
|
|
return STATUS_NOT_IMPLEMENTED;
|
|
}
|
|
|
|
static NTSTATUS usb_cancel_transfer(void *args)
|
|
{
|
|
const struct usb_cancel_transfer_params *params = args;
|
|
int ret;
|
|
|
|
if ((ret = libusb_cancel_transfer(params->transfer)) < 0)
|
|
ERR("Failed to cancel transfer: %s\n", libusb_strerror(ret));
|
|
|
|
return STATUS_SUCCESS;
|
|
}
|
|
|
|
static void decref_device(struct unix_device *device)
|
|
{
|
|
pthread_mutex_lock(&device_mutex);
|
|
|
|
if (--device->refcount)
|
|
{
|
|
pthread_mutex_unlock(&device_mutex);
|
|
return;
|
|
}
|
|
|
|
list_remove(&device->entry);
|
|
|
|
pthread_mutex_unlock(&device_mutex);
|
|
|
|
if (device->parent)
|
|
decref_device(device->parent);
|
|
else
|
|
libusb_close(device->handle);
|
|
free(device);
|
|
}
|
|
|
|
static NTSTATUS usb_destroy_device(void *args)
|
|
{
|
|
const struct usb_destroy_device_params *params = args;
|
|
struct unix_device *device = params->device;
|
|
|
|
decref_device(device);
|
|
|
|
return STATUS_SUCCESS;
|
|
}
|
|
|
|
const unixlib_entry_t __wine_unix_call_funcs[] =
|
|
{
|
|
#define X(name) [unix_ ## name] = name
|
|
X(usb_main_loop),
|
|
X(usb_init),
|
|
X(usb_exit),
|
|
X(usb_submit_urb),
|
|
X(usb_cancel_transfer),
|
|
X(usb_destroy_device),
|
|
};
|