usb_dev_handle *
usb_open(struct usb_device *dev)
{
int err;
err = libusb20_dev_open(dev->dev, 16 * 2);
if (err == LIBUSB20_ERROR_BUSY) {
/*
* Workaround buggy USB applications which open the USB
* device multiple times:
*/
return (dev->dev);
}
if (err)
return (NULL);
/*
* Dequeue USB device from backend queue so that it does not get
* freed when the backend is re-scanned:
*/
libusb20_be_dequeue_device(usb_backend, dev->dev);
return (dev->dev);
}
ssize_t
libusb_get_device_list(libusb_context *ctx, libusb_device ***list)
{
struct libusb20_backend *usb_backend;
struct libusb20_device *pdev;
struct libusb_device *dev;
int i;
ctx = GET_CONTEXT(ctx);
if (ctx == NULL)
return (LIBUSB_ERROR_INVALID_PARAM);
if (list == NULL)
return (LIBUSB_ERROR_INVALID_PARAM);
usb_backend = libusb20_be_alloc_default();
if (usb_backend == NULL)
return (LIBUSB_ERROR_NO_MEM);
/* figure out how many USB devices are present */
pdev = NULL;
i = 0;
while ((pdev = libusb20_be_device_foreach(usb_backend, pdev)))
i++;
/* allocate device pointer list */
*list = malloc((i + 1) * sizeof(void *));
if (*list == NULL) {
libusb20_be_free(usb_backend);
return (LIBUSB_ERROR_NO_MEM);
}
/* create libusb v1.0 compliant devices */
i = 0;
while ((pdev = libusb20_be_device_foreach(usb_backend, NULL))) {
dev = malloc(sizeof(*dev));
if (dev == NULL) {
while (i != 0) {
libusb_unref_device((*list)[i - 1]);
i--;
}
free(*list);
*list = NULL;
libusb20_be_free(usb_backend);
return (LIBUSB_ERROR_NO_MEM);
}
/* get device into libUSB v1.0 list */
libusb20_be_dequeue_device(usb_backend, pdev);
memset(dev, 0, sizeof(*dev));
/* init transfer queues */
TAILQ_INIT(&dev->tr_head);
/* set context we belong to */
dev->ctx = ctx;
/* link together the two structures */
dev->os_priv = pdev;
pdev->privLuData = dev;
(*list)[i] = libusb_ref_device(dev);
i++;
}
(*list)[i] = NULL;
libusb20_be_free(usb_backend);
return (i);
}
int
usb_find_devices(void)
{
struct libusb20_device *pdev;
struct usb_device *udev;
struct LIBUSB20_DEVICE_DESC_DECODED *ddesc;
int devnum;
int err;
/* cleanup after last device search */
/* close all opened devices, if any */
while ((pdev = libusb20_be_device_foreach(usb_backend, NULL))) {
udev = pdev->privLuData;
libusb20_be_dequeue_device(usb_backend, pdev);
libusb20_dev_free(pdev);
if (udev != NULL) {
LIST_DEL(usb_global_bus.devices, udev);
free(udev);
}
}
/* free old USB backend, if any */
libusb20_be_free(usb_backend);
/* do a new backend device search */
usb_backend = libusb20_be_alloc_default();
if (usb_backend == NULL) {
return (-1);
}
/* iterate all devices */
devnum = 1;
pdev = NULL;
while ((pdev = libusb20_be_device_foreach(usb_backend, pdev))) {
udev = malloc(sizeof(*udev));
if (udev == NULL)
break;
memset(udev, 0, sizeof(*udev));
udev->bus = &usb_global_bus;
snprintf(udev->filename, sizeof(udev->filename),
"/dev/ugen%u.%u",
libusb20_dev_get_bus_number(pdev),
libusb20_dev_get_address(pdev));
ddesc = libusb20_dev_get_device_desc(pdev);
udev->descriptor.bLength = sizeof(udev->descriptor);
udev->descriptor.bDescriptorType = ddesc->bDescriptorType;
udev->descriptor.bcdUSB = ddesc->bcdUSB;
udev->descriptor.bDeviceClass = ddesc->bDeviceClass;
udev->descriptor.bDeviceSubClass = ddesc->bDeviceSubClass;
udev->descriptor.bDeviceProtocol = ddesc->bDeviceProtocol;
udev->descriptor.bMaxPacketSize0 = ddesc->bMaxPacketSize0;
udev->descriptor.idVendor = ddesc->idVendor;
udev->descriptor.idProduct = ddesc->idProduct;
udev->descriptor.bcdDevice = ddesc->bcdDevice;
udev->descriptor.iManufacturer = ddesc->iManufacturer;
udev->descriptor.iProduct = ddesc->iProduct;
udev->descriptor.iSerialNumber = ddesc->iSerialNumber;
udev->descriptor.bNumConfigurations =
ddesc->bNumConfigurations;
if (udev->descriptor.bNumConfigurations > USB_MAXCONFIG) {
/* truncate number of configurations */
udev->descriptor.bNumConfigurations = USB_MAXCONFIG;
}
udev->devnum = devnum++;
/* link together the two structures */
udev->dev = pdev;
pdev->privLuData = udev;
err = libusb20_dev_open(pdev, 0);
if (err == 0) {
/* XXX get all config descriptors by default */
usb_fetch_and_parse_descriptors((void *)pdev);
libusb20_dev_close(pdev);
}
LIST_ADD(usb_global_bus.devices, udev);
}
return (devnum - 1); /* success */
}
