* 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
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,
+static bool jtag_libusb_match(struct libusb_device_descriptor *dev_desc,
const uint16_t vids[], const uint16_t pids[])
{
- struct libusb_device_descriptor dev_desc;
-
for (unsigned i = 0; vids[i]; i++) {
- if (libusb_get_device_descriptor(dev, &dev_desc) == 0) {
- if (dev_desc.idVendor == vids[i] &&
- dev_desc.idProduct == pids[i])
- return true;
+ if (dev_desc->idVendor == vids[i] &&
+ dev_desc->idProduct == pids[i]) {
+ return true;
}
}
return false;
}
+/* Returns true if the string descriptor indexed by str_index in device matches string */
+static bool string_descriptor_equal(libusb_device_handle *device, uint8_t str_index,
+ const char *string)
+{
+ int retval;
+ bool matched;
+ char desc_string[256+1]; /* Max size of string descriptor */
+
+ if (str_index == 0)
+ return false;
+
+ retval = libusb_get_string_descriptor_ascii(device, str_index,
+ (unsigned char *)desc_string, sizeof(desc_string)-1);
+ if (retval < 0) {
+ LOG_ERROR("libusb_get_string_descriptor_ascii() failed with %d", retval);
+ return false;
+ }
+
+ /* Null terminate descriptor string in case it needs to be logged. */
+ desc_string[sizeof(desc_string)-1] = '\0';
+
+ matched = strncmp(string, desc_string, sizeof(desc_string)) == 0;
+ if (!matched)
+ LOG_DEBUG("Device serial number '%s' doesn't match requested serial '%s'",
+ desc_string, string);
+ return matched;
+}
+
int jtag_libusb_open(const uint16_t vids[], const uint16_t pids[],
+ const char *serial,
struct jtag_libusb_device_handle **out)
{
int cnt, idx, errCode;
+ int retval = ERROR_FAIL;
+ struct jtag_libusb_device_handle *libusb_handle = NULL;
if (libusb_init(&jtag_libusb_context) < 0)
- return -ENODEV;
+ return ERROR_FAIL;
cnt = libusb_get_device_list(jtag_libusb_context, &devs);
for (idx = 0; idx < cnt; idx++) {
- if (!jtag_libusb_match(devs[idx], vids, pids))
+ struct libusb_device_descriptor dev_desc;
+
+ if (libusb_get_device_descriptor(devs[idx], &dev_desc) != 0)
continue;
- errCode = libusb_open(devs[idx], out);
+ if (!jtag_libusb_match(&dev_desc, vids, pids))
+ continue;
- /** Free the device list **/
- libusb_free_device_list(devs, 1);
+ errCode = libusb_open(devs[idx], &libusb_handle);
if (errCode) {
LOG_ERROR("libusb_open() failed with %s",
libusb_error_name(errCode));
- return errCode;
+ continue;
+ }
+
+ /* Device must be open to use libusb_get_string_descriptor_ascii. */
+ if (serial != NULL &&
+ !string_descriptor_equal(libusb_handle, dev_desc.iSerialNumber, serial)) {
+ libusb_close(libusb_handle);
+ continue;
}
- return 0;
+
+ /* Success. */
+ *out = libusb_handle;
+ retval = ERROR_OK;
+ break;
}
- return -ENODEV;
+ if (cnt >= 0)
+ libusb_free_device_list(devs, 1);
+ return retval;
}
void jtag_libusb_close(jtag_libusb_device_handle *dev)
int retCode = -99;
struct libusb_config_descriptor *config = NULL;
+ int current_config = -1;
+
+ retCode = libusb_get_configuration(devh, ¤t_config);
+ if (retCode != 0)
+ return retCode;
+
+ retCode = libusb_get_config_descriptor(udev, configuration, &config);
+ if (retCode != 0 || config == NULL)
+ return retCode;
- libusb_get_config_descriptor(udev, configuration, &config);
- retCode = libusb_set_configuration(devh, config->bConfigurationValue);
+ /* Only change the configuration if it is not already set to the
+ same one. Otherwise this issues a lightweight reset and hangs
+ LPC-Link2 with JLink firmware. */
+ if (current_config != config->bConfigurationValue)
+ retCode = libusb_set_configuration(devh, config->bConfigurationValue);
libusb_free_config_descriptor(config);
return retCode;
}
-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);
const struct libusb_interface *inter;
const struct libusb_interface_descriptor *interdesc;
const struct libusb_endpoint_descriptor *epdesc;
struct libusb_config_descriptor *config;
+ *usb_read_ep = *usb_write_ep = 0;
+
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;
+ interdesc = &inter->altsetting[0];
+ for (int k = 0;
+ k < (int)interdesc->bNumEndpoints; k++) {
+ if ((bclass > 0 && interdesc->bInterfaceClass != bclass) ||
+ (subclass > 0 && interdesc->bInterfaceSubClass != subclass) ||
+ (protocol > 0 && interdesc->bInterfaceProtocol != protocol))
+ continue;
+
+ epdesc = &interdesc->endpoint[k];
+ if (trans_type > 0 && (epdesc->bmAttributes & 0x3) != trans_type)
+ continue;
+
+ 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;
+
+ if (*usb_read_ep && *usb_write_ep) {
+ LOG_DEBUG("Claiming interface %d", (int)interdesc->bInterfaceNumber);
+ libusb_claim_interface(devh, (int)interdesc->bInterfaceNumber);
+ libusb_free_config_descriptor(config);
+ return ERROR_OK;
}
}
}
libusb_free_config_descriptor(config);
- return 0;
+ return ERROR_FAIL;
+}
+
+int jtag_libusb_get_pid(struct jtag_libusb_device *dev, uint16_t *pid)
+{
+ struct libusb_device_descriptor dev_desc;
+
+ if (libusb_get_device_descriptor(dev, &dev_desc) == 0) {
+ *pid = dev_desc.idProduct;
+
+ return ERROR_OK;
+ }
+
+ return ERROR_FAIL;
}
projects / openocd / blobdiff