libusb-1.0 support

The configuration script check for libusb-1.0 availability first and only
if not found check for libusb-0. So if both libraries are installed on the
system the build script will use libusb-1.0
It's possible to force compiling with libusb-0 with the --enable-libusb0 switch.
If the driver support only libusb0 the script check anly for it.

Change-Id: I7eb045d4e2bd553abefad53f3f4023ff46b0f5f6
Signed-off-by: Mauro Gamba <maurillo71@gmail.com>
Reviewed-on: http://openocd.zylin.com/33
Tested-by: jenkins
Reviewed-by: Spencer Oliver <spen@spen-soft.co.uk>

1 files changed, 152 insertions, 0 deletions

diff --git a/src/jtag/drivers/libusb1_common.c b/src/jtag/drivers/libusb1_common.c
new file mode 100644
index 00000000..c6cb4943
--- /dev/null
+++ b/src/jtag/drivers/libusb1_common.c
@@ -0,0 +1,152 @@
+/***************************************************************************
+ *   Copyright (C) 2009 by Zachary T Welch <zw@superlucidity.net>          *
+ *                                                                         *
+ *   Copyright (C) 2011 by Mauro Gamba <maurillo71@gmail.com>              *
+ *                                                                         *
+ *   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.,                                       *
+ *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
+ ***************************************************************************/
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+#include "log.h"
+#include "libusb1_common.h"
+
+static struct libusb_context *jtag_libusb_context; /**< Libusb context **/
+static libusb_device **devs; /**< The usb device list **/
+
+static bool jtag_libusb_match(struct jtag_libusb_device *dev,
+		const uint16_t vids[], const uint16_t pids[])
+{
+	struct libusb_device_descriptor dev_desc;
+
+	for (unsigned i = 0; vids[i] && pids[i]; i++) {
+		if (libusb_get_device_descriptor(dev, &dev_desc) == 0) {
+			if (dev_desc.idVendor == vids[i] &&
+				dev_desc.idProduct == pids[i])
+				return true;
+		}
+	}
+	return false;
+}
+
+int jtag_libusb_open(const uint16_t vids[], const uint16_t pids[],
+		struct jtag_libusb_device_handle **out)
+{
+	int cnt, idx, errCode;
+
+	if (libusb_init(&jtag_libusb_context) < 0)
+		return -ENODEV;
+
+	libusb_set_debug(jtag_libusb_context, 3);
+
+	cnt = libusb_get_device_list(jtag_libusb_context, &devs);
+
+	for (idx = 0; idx < cnt; idx++) {
+		if (!jtag_libusb_match(devs[idx], vids, pids))
+			continue;
+
+		errCode = libusb_open(devs[idx], out);
+
+		/** Free the device list **/
+		libusb_free_device_list(devs, 1);
+
+		if (errCode < 0)
+			return errCode;
+		return 0;
+	}
+	return -ENODEV;
+}
+
+void jtag_libusb_close(jtag_libusb_device_handle *dev)
+{
+	/* Close device */
+	jtag_libusb_close(dev);
+
+	libusb_exit(jtag_libusb_context);
+}
+
+int jtag_libusb_bulk_write(jtag_libusb_device_handle *dev, int ep, char *bytes,
+			   int size, int timeout)
+{
+	int transferred = 0;
+
+	libusb_bulk_transfer(dev, ep, (unsigned char *)bytes, size,
+			     &transferred, timeout);
+	return transferred;
+}
+
+int jtag_libusb_bulk_read(jtag_libusb_device_handle *dev, int ep, char *bytes,
+			  int size, int timeout)
+{
+	int transferred = 0;
+
+	libusb_bulk_transfer(dev, ep, (unsigned char *)bytes, size,
+			     &transferred, timeout);
+	return transferred;
+}
+
+int jtag_libusb_set_configuration(jtag_libusb_device_handle *devh,
+				  int configuration)
+{
+	struct jtag_libusb_device *udev = jtag_libusb_get_device(devh);
+	int retCode = -99;
+
+	struct libusb_config_descriptor *config;
+
+	libusb_get_config_descriptor(udev, configuration, &config);
+	retCode = libusb_set_configuration(devh, config->bConfigurationValue);
+
+	libusb_free_config_descriptor(config);
+
+	return retCode;
+}
+
+int jtag_libusb_get_endpoints(struct jtag_libusb_device *udev,
+			      unsigned int *usb_read_ep,
+			      unsigned int *usb_write_ep)
+{
+	const struct libusb_interface *inter;
+	const struct libusb_interface_descriptor *interdesc;
+	const struct libusb_endpoint_descriptor *epdesc;
+	struct libusb_config_descriptor *config;
+
+	libusb_get_config_descriptor(udev, 0, &config);
+	for (int i = 0; i < (int)config->bNumInterfaces; i++) {
+		inter = &config->interface[i];
+
+		for (int j = 0; j < inter->num_altsetting; j++) {
+			interdesc = &inter->altsetting[j];
+			for (int k = 0;
+				k < (int)interdesc->bNumEndpoints; k++) {
+				epdesc = &interdesc->endpoint[k];
+
+				uint8_t epnum = epdesc->bEndpointAddress;
+				bool is_input = epnum & 0x80;
+				LOG_DEBUG("usb ep %s %02x",
+					is_input ? "in" : "out", epnum);
+
+				if (is_input)
+					*usb_read_ep = epnum;
+				else
+					*usb_write_ep = epnum;
+			}
+		}
+	}
+	libusb_free_config_descriptor(config);
+
+	return 0;
+}