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diff --git a/sys/dev/usb/usb.h b/sys/dev/usb/usb.h
--- a/sys/dev/usb/usb.h
+++ b/sys/dev/usb/usb.h
@@ -331,6 +331,7 @@
#define USB_DEVCAP_USB2EXT 0x02
#define USB_DEVCAP_SUPER_SPEED 0x03
#define USB_DEVCAP_CONTAINER_ID 0x04
+#define USB_DEVCAP_SUPERSPEED_PLUS 0x0A
/* data ... */
} __packed;
typedef struct usb_bos_cap_descriptor usb_bos_cap_descriptor_t;
@@ -371,6 +372,49 @@
typedef struct usb_devcap_container_id_descriptor
usb_devcap_container_id_descriptor_t;
+struct usb_devcap_ss_plus_descriptor_header {
+ uByte bLength;
+ uByte bDescriptorType;
+ uByte bDevCapabilityType;
+ uByte bReserved;
+ uDWord bmAttributes;
+ uWord wFunctionalitySupport;
+ uWord wReserved;
+} __packed;
+
+struct usb_devcap_ss_plus_descriptor {
+ uByte bLength;
+ uByte bDescriptorType;
+ uByte bDevCapabilityType;
+ uByte bReserved;
+#define USB_DEVCAP_SSPLUS_SSAC_GET(x) (x & 0x0F)
+#define USB_DEVCAP_SSPLUS_SSAC_SET(v) (v & 0x0F)
+#define USB_DEVCAP_SSPLUS_SSIC_GET(x) ((x >> 4) & 0x0F)
+#define USB_DEVCAP_SSPLUS_SSIC_SET(v) ((v & 0x0F) << 4)
+ uDWord bmAttributes;
+#define USB_DEVCAP_SSPLUS_MIN_SSID_GET(x) (x & 0x0F)
+#define USB_DEVCAP_SSPLUS_MIN_SSID_SET(v) (v & 0x0F)
+#define USB_DEVCAP_SSPLUS_MIN_RXLINK_GET(x) ((x >> 8) & 0x0F)
+#define USB_DEVCAP_SSPLUS_MIN_RXLINK_SET(v) ((v & 0x0F) << 8)
+#define USB_DEVCAP_SSPLUS_MIN_TXLINK_GET(x) ((x >> 12) & 0x0F)
+#define USB_DEVCAP_SSPLUS_MIN_TXLINK_SET(v) ((v & 0x0F) << 12)
+ uWord wFunctionalitySupport;
+ uWord wReserved;
+#define USB_DEVCAP_SSPLUS_SSID_GET(x) (x & 0x0F)
+#define USB_DEVCAP_SSPLUS_SSID_SET(v) (v & 0x0F)
+#define USB_DEVCAP_SSPLUS_LSE_GET(x) ((x >> 4) & 0x03)
+#define USB_DEVCAP_SSPLUS_LSE_SET(v) ((v & 0x03) << 4)
+#define USB_DEVCAP_SSPLUS_ST_GET(x) ((x >> 6) & 0x03)
+#define USB_DEVCAP_SSPLUS_ST_SET(v) ((v & 0x03) << 6)
+#define USB_DEVCAP_SSPLUS_LP_GET(x) ((x >> 14) & 0x01)
+#define USB_DEVCAP_SSPLUS_LP_SET(v) ((v & 0x01) << 14)
+#define USB_DEVCAP_SSPLUS_LSM_GET(x) ((x >> 16) & 0xFFFF)
+#define USB_DEVCAP_SSPLUS_LSM_SET(v) ((v & 0xFFFF) << 16)
+ uDWord bmSublinkSpeedAttr[];
+} __packed;
+typedef struct usb_devcap_ss_plus_descriptor
+ usb_devcap_ss_plus_descriptor_t;
+
/* Device class codes */
#define UDCLASS_IN_INTERFACE 0x00
#define UDCLASS_COMM 0x02

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