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authorMathias Nyman <mathias.nyman@linux.intel.com>2017-08-16 14:23:22 +0300
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2017-08-16 15:26:26 -0700
commit2e77a8253d1db03deceb2a1b265307f21e2a879a (patch)
tree8e0f53495242aed0d3907f3679538833333aea4c
parent7344ee328c5bd2a709d9d849306b8a7e3a78c74d (diff)
downloadop-kernel-dev-2e77a8253d1db03deceb2a1b265307f21e2a879a.zip
op-kernel-dev-2e77a8253d1db03deceb2a1b265307f21e2a879a.tar.gz
xhci: Add port status decoder for tracing purposes
Add PORTSC Port status and control register decoder to show human readable tracing of portsc register Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-rw-r--r--drivers/usb/host/xhci.h81
1 files changed, 81 insertions, 0 deletions
diff --git a/drivers/usb/host/xhci.h b/drivers/usb/host/xhci.h
index 18fe51c..2abaa4d 100644
--- a/drivers/usb/host/xhci.h
+++ b/drivers/usb/host/xhci.h
@@ -2399,6 +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) {
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