1 files changed, 89 insertions, 1 deletions

diff --git a/drivers/usb/host/xhci.h b/drivers/usb/host/xhci.h
index e3e935291ed6..2abaa4d6d39d 100644
--- a/drivers/usb/host/xhci.h
+++ b/drivers/usb/host/xhci.h
@@ -311,12 +311,19 @@ struct xhci_op_regs {
  */
 #define PORT_PLS_MASK   (0xf << 5)
 #define XDEV_U0         (0x0 << 5)
+#define XDEV_U1         (0x1 << 5)
 #define XDEV_U2         (0x2 << 5)
 #define XDEV_U3         (0x3 << 5)
+#define XDEV_DISABLED   (0x4 << 5)
+#define XDEV_RXDETECT   (0x5 << 5)
 #define XDEV_INACTIVE   (0x6 << 5)
 #define XDEV_POLLING    (0x7 << 5)
-#define XDEV_COMP_MODE  (0xa << 5)
+#define XDEV_RECOVERY   (0x8 << 5)
+#define XDEV_HOT_RESET  (0x9 << 5)
+#define XDEV_COMP_MODE  (0xa << 5)
+#define XDEV_TEST_MODE  (0xb << 5)
 #define XDEV_RESUME     (0xf << 5)
+
 /* true: port has power (see HCC_PPC) */
 #define PORT_POWER      (1 << 9)
 /* bits 10:13 indicate device speed:
@@ -2392,6 +2399,87 @@ static inline const char *xhci_decode_slot_context(u32 info, u32 info2,
         return str;
 }
 
+
+static inline const char *xhci_portsc_link_state_string(u32 portsc)
+{
+        switch (portsc & PORT_PLS_MASK) {
+        case XDEV_U0:
+                return "U0";
+        case XDEV_U1:
+                return "U1";
+        case XDEV_U2:
+                return "U2";
+        case XDEV_U3:
+                return "U3";
+        case XDEV_DISABLED:
+                return "Disabled";
+        case XDEV_RXDETECT:
+                return "RxDetect";
+        case XDEV_INACTIVE:
+                return "Inactive";
+        case XDEV_POLLING:
+                return "Polling";
+        case XDEV_RECOVERY:
+                return "Recovery";
+        case XDEV_HOT_RESET:
+                return "Hot Reset";
+        case XDEV_COMP_MODE:
+                return "Compliance mode";
+        case XDEV_TEST_MODE:
+                return "Test mode";
+        case XDEV_RESUME:
+                return "Resume";
+        default:
+                break;
+        }
+        return "Unknown";
+}
+
+static inline const char *xhci_decode_portsc(u32 portsc)
+{
+        static char str[256];
+        int ret;
+
+        ret = sprintf(str, "%s %s %s Link:%s ",
+                      portsc & PORT_POWER       ? "Powered" : "Powered-off",
+                      portsc & PORT_CONNECT     ? "Connected" : "Not-connected",
+                      portsc & PORT_PE          ? "Enabled" : "Disabled",
+                      xhci_portsc_link_state_string(portsc));
+
+        if (portsc & PORT_OC)
+                ret += sprintf(str + ret, "OverCurrent ");
+        if (portsc & PORT_RESET)
+                ret += sprintf(str + ret, "In-Reset ");
+
+        ret += sprintf(str + ret, "Change: ");
+        if (portsc & PORT_CSC)
+                ret += sprintf(str + ret, "CSC ");
+        if (portsc & PORT_PEC)
+                ret += sprintf(str + ret, "PEC ");
+        if (portsc & PORT_WRC)
+                ret += sprintf(str + ret, "WRC ");
+        if (portsc & PORT_OCC)
+                ret += sprintf(str + ret, "OCC ");
+        if (portsc & PORT_RC)
+                ret += sprintf(str + ret, "PRC ");
+        if (portsc & PORT_PLC)
+                ret += sprintf(str + ret, "PLC ");
+        if (portsc & PORT_CEC)
+                ret += sprintf(str + ret, "CEC ");
+        if (portsc & PORT_CAS)
+                ret += sprintf(str + ret, "CAS ");
+
+        ret += sprintf(str + ret, "Wake: ");
+        if (portsc & PORT_WKCONN_E)
+                ret += sprintf(str + ret, "WCE ");
+        if (portsc & PORT_WKDISC_E)
+                ret += sprintf(str + ret, "WDE ");
+        if (portsc & PORT_WKOC_E)
+                ret += sprintf(str + ret, "WOE ");
+
+        return str;
+}
+
 static inline const char *xhci_ep_state_string(u8 state)
 {
         switch (state) {