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remote-sim host tools: Auto-discover the endpoint addresses

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We now auto-discover the end-point addresses based on the interface
descriptor.  The user can also use the new "--interface" command line
argument to set a non-zero intrerface.  In combination, this should
enable support for the remote-sim functionality on the second UART
on OWHW.
This commit is contained in:
Harald Welte
2016-03-19 21:28:09 +01:00
parent 095ac6cbe2
commit 236caf68eb
6 changed files with 124 additions and 27 deletions
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75
host/simtrace2-discovery.c Normal file
View File

@@ -0,0 +1,75 @@
#include <stdint.h>
#include <libusb.h>
/*! \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;
}
#if 0
struct libusb_device_descriptor ddesc;
int rc, i, j, k;
rc = libusb_get_device_descriptor(devh, &ddesc);
if (rc < 0)
return;
for (i = 0; i < ddesc.bNumConfigurations; i++) {
struct libusb_config_descriptor *cdesc;
rc = libusb_get_config_descriptor(devh, i, &cdesc);
if (rc < 0)
return;
for (j = 0; j < cdesc->bNumInterfaces; j++) {
const struct libusb_interface *iface = cdesc->interface[j];
for (k = 0; k < iface->num_altsetting; k++) {
const struct libusb_interface_descriptor *idesc = iface->altsetting[k];
/* make sure this is the interface we're looking for */
if (idesc->bInterfaceClass != 0xFF ||
idesc->bInterfaceSubClass != if_class ||
idsec->bInterfaceProtocol != if_proto)
continue;
/* FIXME */
}
}
libusb_free_config_descriptor(cdesc);
}
#endif