| Kévin Redon | 26a6609 | 2018-10-10 00:30:23 +0200 | [diff] [blame] | 1 | /* simtrace2-discovery - host PC library to scan for matching USB |
| 2 | * devices |
| 3 | * |
| 4 | * (C) 2016 by Harald Welte <hwelte@hmw-consulting.de> |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or |
| 7 | * modify it under the terms of the GNU General Public License |
| 8 | * as published by the Free Software Foundation; either version 2 |
| 9 | * of the License, or (at your option) any later version. |
| 10 | * |
| 11 | * This program is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | * GNU General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU General Public License |
| 17 | * along with this program; if not, write to the Free Software |
| 18 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. |
| 19 | */ |
| 20 | #include <stdint.h> |
| 21 | |
| 22 | #include <libusb.h> |
| 23 | |
| 24 | /*! \brief obtain the endpoint addresses for a given USB interface */ |
| 25 | int get_usb_ep_addrs(libusb_device_handle *devh, unsigned int if_num, |
| 26 | uint8_t *out, uint8_t *in, uint8_t *irq) |
| 27 | { |
| 28 | libusb_device *dev = libusb_get_device(devh); |
| 29 | struct libusb_config_descriptor *cdesc; |
| 30 | const struct libusb_interface_descriptor *idesc; |
| 31 | const struct libusb_interface *iface; |
| 32 | int rc, l; |
| 33 | |
| 34 | rc = libusb_get_active_config_descriptor(dev, &cdesc); |
| 35 | if (rc < 0) |
| 36 | return rc; |
| 37 | |
| 38 | iface = &cdesc->interface[if_num]; |
| 39 | /* FIXME: we assume there's no altsetting */ |
| 40 | idesc = &iface->altsetting[0]; |
| 41 | |
| 42 | for (l = 0; l < idesc->bNumEndpoints; l++) { |
| 43 | const struct libusb_endpoint_descriptor *edesc = &idesc->endpoint[l]; |
| 44 | switch (edesc->bmAttributes & 3) { |
| 45 | case LIBUSB_TRANSFER_TYPE_BULK: |
| 46 | if (edesc->bEndpointAddress & 0x80) { |
| 47 | if (in) |
| 48 | *in = edesc->bEndpointAddress; |
| 49 | } else { |
| 50 | if (out) |
| 51 | *out = edesc->bEndpointAddress; |
| 52 | } |
| 53 | break; |
| 54 | case LIBUSB_TRANSFER_TYPE_INTERRUPT: |
| 55 | if (irq) |
| 56 | *irq = edesc->bEndpointAddress; |
| 57 | break; |
| 58 | default: |
| 59 | break; |
| 60 | } |
| 61 | } |
| 62 | return 0; |
| 63 | } |
| 64 | |
| 65 | #if 0 |
| 66 | struct libusb_device_descriptor ddesc; |
| 67 | int rc, i, j, k; |
| 68 | |
| 69 | rc = libusb_get_device_descriptor(devh, &ddesc); |
| 70 | if (rc < 0) |
| 71 | return; |
| 72 | |
| 73 | for (i = 0; i < ddesc.bNumConfigurations; i++) { |
| 74 | struct libusb_config_descriptor *cdesc; |
| 75 | rc = libusb_get_config_descriptor(devh, i, &cdesc); |
| 76 | if (rc < 0) |
| 77 | return; |
| 78 | |
| 79 | for (j = 0; j < cdesc->bNumInterfaces; j++) { |
| 80 | const struct libusb_interface *iface = cdesc->interface[j]; |
| 81 | for (k = 0; k < iface->num_altsetting; k++) { |
| 82 | const struct libusb_interface_descriptor *idesc = iface->altsetting[k]; |
| 83 | /* make sure this is the interface we're looking for */ |
| 84 | if (idesc->bInterfaceClass != 0xFF || |
| 85 | idesc->bInterfaceSubClass != if_class || |
| 86 | idsec->bInterfaceProtocol != if_proto) |
| 87 | continue; |
| 88 | /* FIXME */ |
| 89 | } |
| 90 | } |
| 91 | |
| 92 | libusb_free_config_descriptor(cdesc); |
| 93 | } |
| 94 | #endif |