Added support for Billboard Capability descriptor as per Universal
Serial Bus Device Class Definition for Billboard Devices Revision 1.1
Signed-off-by: Muthu M <muthu....@gmail.com>
---
lsusb.c | 82 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 82 insertions(+)
diff --git a/lsusb.c b/lsusb.c
index 774caed..dae7c6c 100644
--- a/lsusb.c
+++ b/lsusb.c
@@ -70,6 +70,7 @@
#define USB_DC_SUPERSPEED 0x03
#define USB_DC_CONTAINER_ID 0x04
#define USB_DC_SUPERSPEEDPLUS 0x0a
+#define USB_DC_BILLBOARD 0x0d
/* Conventional codes for class-specific descriptors. The convention is
* defined in the USB "Common Class" Spec (3.11). Individual class specs
@@ -118,6 +119,22 @@ static const char * const encryption_type[] = {
"RSA_1",
"RESERVED"
};
+static const char * const vconn_power[] = {
+ "1W",
+ "1.5W",
+ "2W",
+ "3W",
+ "4W",
+ "5W",
+ "6W",
+ "reserved"
+};
+static const char * const alt_mode_state[] = {
+ "Unspecified Error",
+ "Alternate Mode configuration not attempted",
+ "Alternate Mode configuration attempted but unsuccessful",
+ "Alternate Mode configuration successful"
+};
static void dump_interface(libusb_device_handle *dev, const struct
libusb_interface *interface);
static void dump_endpoint(libusb_device_handle *dev, const struct
libusb_interface_descriptor *interface, const struct libusb_endpoint_descriptor
*endpoint);
@@ -3771,6 +3788,68 @@ static void
dump_container_id_device_capability_desc(unsigned char *buf)
get_guid(&buf[4]));
}
+static void dump_billboard_device_capability_desc(libusb_device_handle *dev,
unsigned char *buf)
+{
+ char *url, *alt_mode_str;
+ int w_vconn_power, alt_mode, i, svid, state;
+ const char *vconn;
+ unsigned char *bmConfigured;
+
+ if (buf[0] < 40) {
+ printf(" Bad Billboard Capability descriptor.\n");
+ return;
+ }
+ url = get_dev_string(dev, buf[3]);
+ w_vconn_power = buf[6] | (buf[7] << 8);
+ vconn = (w_vconn_power & (1 << 15)) ? "VCONN power not required" :
vconn_power[w_vconn_power & 0x7];
+ printf(" Billboard Capability:\n"
+ " bLength %5u\n"
+ " bDescriptorType %5u\n"
+ " bDevCapabilityType %5u\n"
+ " iAddtionalInfoURL %5u %s\n"
+ " bNumberOfAlternateModes %5u\n"
+ " bPreferredAlternateMode %5u\n"
+ " VCONN Power %5u %s\n",
+ buf[0], buf[1], buf[2],
+ buf[3], url,
+ buf[4], buf[5],
+ w_vconn_power, vconn);
+ bmConfigured = &buf[8];
+ printf(
+ " bmConfigured "
+ );
+ dump_bytes(bmConfigured, 32);
+ printf(
+ " bcdVersion %2x.%02x\n"
+ " bAdditionalFailureInfo %5u\n"
+ " bReserved %5u\n",
+ (buf[41] == 0) ? 1 : buf[41], buf[40],
+ buf[42], buf[43]);
+
+ printf(
+ " Alternate Modes supported by Device Container:\n"
+ );
+ i = 44; /* Alternate mode 0 starts at index 44 */
+ for (alt_mode = 0; alt_mode < buf[4]; alt_mode++) {
+ svid = buf[i] | (buf[i+1] << 8);
+ alt_mode_str = get_dev_string(dev, buf[i+3]);
+ state = ((bmConfigured[alt_mode >> 2]) >> ((alt_mode & 0x3) <<
1)) & 0x3;
+ printf(
+ " Alternate Mode %d : %s\n"
+ " wSVID[%d] 0x%04X\n"
+ " bAlternateMode[%d] %5u\n"
+ " iAlternateModeString[%d] %5u %s\n",
+ alt_mode, alt_mode_state[state],
+ alt_mode, svid,
+ alt_mode, buf[i+2],
+ alt_mode, buf[i+3], alt_mode_str);
+ free(alt_mode_str);
+ i += 4;
+ }
+
+ free (url);
+}
+
static void dump_bos_descriptor(libusb_device_handle *fd)
{
/* Total length of BOS descriptors varies.
@@ -3849,6 +3928,9 @@ static void dump_bos_descriptor(libusb_device_handle *fd)
case USB_DC_CONTAINER_ID:
dump_container_id_device_capability_desc(buf);
break;
+ case USB_DC_BILLBOARD:
+ dump_billboard_device_capability_desc(fd, buf);
+ break;
default:
printf(" ** UNRECOGNIZED: ");
dump_bytes(buf, buf[0]);
--
1.8.3.2
--
To unsubscribe from this list: send the line "unsubscribe linux-usb" in
the body of a message to majord...@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
