usb: Import a variety of libusb utility functions from simtrace

Those functions were originally developed as part of simtrace; let's
import them to libosmousb as they are truly generic.

Change-Id: I2c18b938e4e1ea5b8a521a386f00db3a7389e47a
Related: OS#4299

1 files changed, 75 insertions, 0 deletions

diff --git a/include/osmocom/usb/libusb.h b/include/osmocom/usb/libusb.h
index 7f10f74c..382c86e1 100644
--- a/include/osmocom/usb/libusb.h
+++ b/include/osmocom/usb/libusb.h
@@ -1,6 +1,81 @@
 #pragma once
+/* libusb utilities
+ *
+ * (C) 2010-2019 by Harald Welte <hwelte@hmw-consulting.de>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ */
 
 #include <libusb.h>
 
+#define USB_MAX_PATH_LEN 20
+
+struct dev_id {
+	uint16_t vendor_id;
+	uint16_t product_id;
+};
+
+/* structure describing a single matching interface found */
+struct usb_interface_match {
+	/* libusb device E*/
+	libusb_device *usb_dev;
+	/* Vendor ID of the device running matching interface */
+	uint16_t vendor;
+	/* Product ID of the device running matching interface */
+	uint16_t product;
+	/* USB Bus Address */
+	uint8_t addr;
+	/* physical path */
+	char path[USB_MAX_PATH_LEN];
+	/* configuration of matching interface */
+	uint8_t configuration;
+	/* interface number of matching interface */
+	uint8_t interface;
+	/* altsetting of matching interface */
+	uint8_t altsetting;
+	/* bInterfaceClass of matching interface */
+	uint8_t class;
+	/* bInterfaceSubClass of matching interface */
+	uint8_t sub_class;
+	/* bInterfaceProtocol of matching interface */
+	uint8_t protocol;
+	/* index of string descriptor of matching interface */
+	uint8_t string_idx;
+};
+
+
+char *osmo_libusb_dev_get_path_buf(char *buf, size_t bufsize, libusb_device *dev);
+char *osmo_libusb_dev_get_path_c(void *ctx, libusb_device *dev);
+
+libusb_device **osmo_libusb_find_matching_usb_devs(void *ctx, struct libusb_context *luctx,
+						   const struct dev_id *dev_ids);
+
+int osmo_libusb_dev_find_matching_interfaces(libusb_device *dev, int class, int sub_class,
+					     int protocol, struct usb_interface_match *out,
+					     unsigned int out_len);
+
+int osmo_libusb_find_matching_interfaces(libusb_context *luctx, const struct dev_id *dev_ids,
+					 int class, int sub_class, int protocol,
+					 struct usb_interface_match *out, unsigned int out_len);
+
+libusb_device_handle *osmo_libusb_open_claim_interface(void *ctx, libusb_context *luctx,
+							const struct usb_interface_match *ifm);
+
+int osmo_libusb_get_ep_addrs(libusb_device_handle *devh, unsigned int if_num,
+			     uint8_t *out, uint8_t *in, uint8_t *irq);
+
+
 int osmo_libusb_init(libusb_context **luctx);
 void osmo_libusb_exit(libusb_context *luctx);