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merge simtrace2-discovery.[ch] to libusb_util.[ch]

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Change-Id: I4defbec70986a90c1f0cfb7587393265b73c0163
This commit is contained in:
Harald Welte
2019-11-24 22:51:07 +01:00
parent 208890ad6e
commit 6f41349db9
8 changed files with 48 additions and 129 deletions
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41
host/lib/libusb_util.c
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@@ -295,3 +295,44 @@ libusb_device_handle *usb_open_claim_interface(libusb_context *ctx,
return usb_devh;
}
/*! \brief obtain the endpoint addresses for a given USB interface */
int get_usb_ep_addrs(libusb_device_handle *devh, unsigned int if_num,
uint8_t *out, uint8_t *in, uint8_t *irq)
{
libusb_device *dev = libusb_get_device(devh);
struct libusb_config_descriptor *cdesc;
const struct libusb_interface_descriptor *idesc;
const struct libusb_interface *iface;
int rc, l;
rc = libusb_get_active_config_descriptor(dev, &cdesc);
if (rc < 0)
return rc;
iface = &cdesc->interface[if_num];
/* FIXME: we assume there's no altsetting */
idesc = &iface->altsetting[0];
for (l = 0; l < idesc->bNumEndpoints; l++) {
const struct libusb_endpoint_descriptor *edesc = &idesc->endpoint[l];
switch (edesc->bmAttributes & 3) {
case LIBUSB_TRANSFER_TYPE_BULK:
if (edesc->bEndpointAddress & 0x80) {
if (in)
*in = edesc->bEndpointAddress;
} else {
if (out)
*out = edesc->bEndpointAddress;
}
break;
case LIBUSB_TRANSFER_TYPE_INTERRUPT:
if (irq)
*irq = edesc->bEndpointAddress;
break;
default:
break;
}
}
return 0;
}