libusb: add debug message on adapter not found due to wrong serial

[openocd.git] / src / jtag / drivers / libusb0_common.c

diff --git a/src/jtag/drivers/libusb0_common.c b/src/jtag/drivers/libusb0_common.c
index b44b7861b7b70f20747430d453a5eaded02d8764..14a8b61cc42617eb740ec9a0e358e4a2bdf00aba 100644 (file)
--- a/src/jtag/drivers/libusb0_common.c
+++ b/src/jtag/drivers/libusb0_common.c
@@ -14,9 +14,7 @@
  *   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.           *
+ *   along with this program.  If not, see <http://www.gnu.org/licenses/>. *
  ***************************************************************************/
 
 #ifdef HAVE_CONFIG_H
@@ -69,7 +67,8 @@ int jtag_libusb_open(const uint16_t vids[], const uint16_t pids[],
                const char *serial,
                struct jtag_libusb_device_handle **out)
 {
-       int retval = -ENODEV;
+       int retval = ERROR_FAIL;
+       bool serial_mismatch = false;
        struct jtag_libusb_device_handle *libusb_handle;
        usb_init();
 
@@ -85,21 +84,27 @@ int jtag_libusb_open(const uint16_t vids[], const uint16_t pids[],
 
                        libusb_handle = usb_open(dev);
                        if (NULL == libusb_handle) {
-                               retval = -errno;
+                               LOG_ERROR("usb_open() failed with %s", usb_strerror());
                                continue;
                        }
 
                        /* Device must be open to use libusb_get_string_descriptor_ascii. */
                        if (serial != NULL &&
                                        !string_descriptor_equal(libusb_handle, dev->descriptor.iSerialNumber, serial)) {
+                               serial_mismatch = true;
                                usb_close(libusb_handle);
                                continue;
                        }
                        *out = libusb_handle;
-                       retval = 0;
+                       retval = ERROR_OK;
+                       serial_mismatch = false;
                        break;
                }
        }
+
+       if (serial_mismatch)
+               LOG_INFO("No device matches the serial string");
+
        return retval;
 }
 
@@ -145,14 +150,24 @@ int jtag_libusb_set_configuration(jtag_libusb_device_handle *devh,
                        udev->config[configuration].bConfigurationValue);
 }
 
-int jtag_libusb_get_endpoints(struct jtag_libusb_device *udev,
+int jtag_libusb_choose_interface(struct jtag_libusb_device_handle *devh,
                unsigned int *usb_read_ep,
-               unsigned int *usb_write_ep)
+               unsigned int *usb_write_ep,
+               int bclass, int subclass, int protocol, int trans_type)
 {
+       struct jtag_libusb_device *udev = jtag_libusb_get_device(devh);
        struct usb_interface *iface = udev->config->interface;
        struct usb_interface_descriptor *desc = iface->altsetting;
 
+       *usb_read_ep = *usb_write_ep = 0;
+
        for (int i = 0; i < desc->bNumEndpoints; i++) {
+               if ((bclass > 0 && desc->bInterfaceClass != bclass) ||
+                   (subclass > 0 && desc->bInterfaceSubClass != subclass) ||
+                   (protocol > 0 && desc->bInterfaceProtocol != protocol) ||
+                   (trans_type > 0 && (desc->endpoint[i].bmAttributes & 0x3) != trans_type))
+                       continue;
+
                uint8_t epnum = desc->endpoint[i].bEndpointAddress;
                bool is_input = epnum & 0x80;
                LOG_DEBUG("usb ep %s %02x", is_input ? "in" : "out", epnum);
@@ -160,9 +175,15 @@ int jtag_libusb_get_endpoints(struct jtag_libusb_device *udev,
                        *usb_read_ep = epnum;
                else
                        *usb_write_ep = epnum;
+
+               if (*usb_read_ep && *usb_write_ep) {
+                       LOG_DEBUG("Claiming interface %d", (int)desc->bInterfaceNumber);
+                       usb_claim_interface(devh, (int)desc->bInterfaceNumber);
+                       return ERROR_OK;
+               }
        }
 
-       return 0;
+       return ERROR_FAIL;
 }
 
 int jtag_libusb_get_pid(struct jtag_libusb_device *dev, uint16_t *pid)