+// SPDX-License-Identifier: GPL-2.0-or-later
+
/*
* Driver for USB-JTAG, Altera USB-Blaster II and compatibles
*
* Copyright (C) 2013 Franck Jullien franck.jullien@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, see <http://www.gnu.org/licenses/>.
- *
*/
#ifdef HAVE_CONFIG_H
#endif
#include <jtag/interface.h>
#include <jtag/commands.h>
+#include "helper/system.h"
#include <libusb_helper.h>
#include <target/image.h>
return ERROR_FAIL;
}
+ if (libusb_claim_interface(libusb_dev, 0)) {
+ LOG_ERROR("unable to claim interface");
+ return ERROR_JTAG_INIT_FAILED;
+ }
+
ublast2_firmware_image.base_address = 0;
ublast2_firmware_image.base_address_set = false;
int ret = image_open(&ublast2_firmware_image, low->firmware_path, "ihex");
if (ret != ERROR_OK) {
LOG_ERROR("Could not load firmware image");
- return ret;
+ goto error_release_usb;
}
/** A host loader program must write 0x01 to the CPUCS register
&ublast2_firmware_image, i);
if (ret != ERROR_OK) {
LOG_ERROR("Error while downloading the firmware");
- return ret;
+ goto error_close_firmware;
}
}
1,
100);
+error_close_firmware:
image_close(&ublast2_firmware_image);
- return ERROR_OK;
+error_release_usb:
+ /*
+ * Release claimed interface. Most probably it is already disconnected
+ * and re-enumerated as new devices after firmware upload, so we do
+ * not need to care about errors.
+ */
+ libusb_release_interface(libusb_dev, 0);
+
+ return ret;
}
static int ublast2_libusb_init(struct ublast_lowlevel *low)
bool renumeration = false;
int ret;
- if (jtag_libusb_open(vids, pids, NULL, &temp, NULL) == ERROR_OK) {
+ if (jtag_libusb_open(vids, pids, &temp, NULL) == ERROR_OK) {
LOG_INFO("Altera USB-Blaster II (uninitialized) found");
LOG_INFO("Loading firmware...");
ret = load_usb_blaster_firmware(temp, low);
const uint16_t pids_renum[] = { low->ublast_pid, 0 };
if (renumeration == false) {
- if (jtag_libusb_open(vids_renum, pids_renum, NULL,
- &low->libusb_dev, NULL) != ERROR_OK) {
+ if (jtag_libusb_open(vids_renum, pids_renum, &low->libusb_dev, NULL) != ERROR_OK) {
LOG_ERROR("Altera USB-Blaster II not found");
return ERROR_FAIL;
}
} else {
int retry = 10;
- while (jtag_libusb_open(vids_renum, pids_renum, NULL,
- &low->libusb_dev, NULL) != ERROR_OK && retry--) {
+ while (jtag_libusb_open(vids_renum, pids_renum, &low->libusb_dev, NULL) != ERROR_OK && retry--) {
usleep(1000000);
LOG_INFO("Waiting for reenumerate...");
}
}
}
+ if (libusb_claim_interface(low->libusb_dev, 0)) {
+ LOG_ERROR("unable to claim interface");
+ jtag_libusb_close(low->libusb_dev);
+ return ERROR_JTAG_INIT_FAILED;
+ }
+
char buffer[5];
jtag_libusb_control_transfer(low->libusb_dev,
LIBUSB_REQUEST_TYPE_VENDOR |
static int ublast2_libusb_quit(struct ublast_lowlevel *low)
{
+ if (libusb_release_interface(low->libusb_dev, 0))
+ LOG_ERROR("usb release interface failed");
+
jtag_libusb_close(low->libusb_dev);
return ERROR_OK;
};