Harald Welte | 236caf6 | 2016-03-19 21:28:09 +0100 | [diff] [blame] | 1 | #include <stdint.h> |
| 2 | |
| 3 | #include <libusb.h> |
| 4 | |
| 5 | /*! \brief obtain the endpoint addresses for a given USB interface */ |
| 6 | int get_usb_ep_addrs(libusb_device_handle *devh, unsigned int if_num, |
| 7 | uint8_t *out, uint8_t *in, uint8_t *irq) |
| 8 | { |
| 9 | libusb_device *dev = libusb_get_device(devh); |
| 10 | struct libusb_config_descriptor *cdesc; |
| 11 | const struct libusb_interface_descriptor *idesc; |
| 12 | const struct libusb_interface *iface; |
| 13 | int rc, l; |
| 14 | |
| 15 | rc = libusb_get_active_config_descriptor(dev, &cdesc); |
| 16 | if (rc < 0) |
| 17 | return rc; |
| 18 | |
| 19 | iface = &cdesc->interface[if_num]; |
| 20 | /* FIXME: we assume there's no altsetting */ |
| 21 | idesc = &iface->altsetting[0]; |
| 22 | |
| 23 | for (l = 0; l < idesc->bNumEndpoints; l++) { |
| 24 | const struct libusb_endpoint_descriptor *edesc = &idesc->endpoint[l]; |
| 25 | switch (edesc->bmAttributes & 3) { |
| 26 | case LIBUSB_TRANSFER_TYPE_BULK: |
| 27 | if (edesc->bEndpointAddress & 0x80) { |
| 28 | if (in) |
| 29 | *in = edesc->bEndpointAddress; |
| 30 | } else { |
| 31 | if (out) |
| 32 | *out = edesc->bEndpointAddress; |
| 33 | } |
| 34 | break; |
| 35 | case LIBUSB_TRANSFER_TYPE_INTERRUPT: |
| 36 | if (irq) |
| 37 | *irq = edesc->bEndpointAddress; |
| 38 | break; |
| 39 | default: |
| 40 | break; |
| 41 | } |
| 42 | } |
| 43 | return 0; |
| 44 | } |
| 45 | |
| 46 | #if 0 |
| 47 | struct libusb_device_descriptor ddesc; |
| 48 | int rc, i, j, k; |
| 49 | |
| 50 | rc = libusb_get_device_descriptor(devh, &ddesc); |
| 51 | if (rc < 0) |
| 52 | return; |
| 53 | |
| 54 | for (i = 0; i < ddesc.bNumConfigurations; i++) { |
| 55 | struct libusb_config_descriptor *cdesc; |
| 56 | rc = libusb_get_config_descriptor(devh, i, &cdesc); |
| 57 | if (rc < 0) |
| 58 | return; |
| 59 | |
| 60 | for (j = 0; j < cdesc->bNumInterfaces; j++) { |
| 61 | const struct libusb_interface *iface = cdesc->interface[j]; |
| 62 | for (k = 0; k < iface->num_altsetting; k++) { |
| 63 | const struct libusb_interface_descriptor *idesc = iface->altsetting[k]; |
| 64 | /* make sure this is the interface we're looking for */ |
| 65 | if (idesc->bInterfaceClass != 0xFF || |
| 66 | idesc->bInterfaceSubClass != if_class || |
| 67 | idsec->bInterfaceProtocol != if_proto) |
| 68 | continue; |
| 69 | /* FIXME */ |
| 70 | } |
| 71 | } |
| 72 | |
| 73 | libusb_free_config_descriptor(cdesc); |
| 74 | } |
| 75 | #endif |