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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>
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1 changed files with 81 additions and 0 deletions
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@ -2399,6 +2399,87 @@ static inline const char *xhci_decode_slot_context(u32 info, u32 info2,
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return str;
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}
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static inline const char *xhci_portsc_link_state_string(u32 portsc)
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{
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switch (portsc & PORT_PLS_MASK) {
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case XDEV_U0:
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return "U0";
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case XDEV_U1:
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return "U1";
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case XDEV_U2:
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return "U2";
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case XDEV_U3:
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return "U3";
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case XDEV_DISABLED:
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return "Disabled";
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case XDEV_RXDETECT:
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return "RxDetect";
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case XDEV_INACTIVE:
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return "Inactive";
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case XDEV_POLLING:
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return "Polling";
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case XDEV_RECOVERY:
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return "Recovery";
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case XDEV_HOT_RESET:
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return "Hot Reset";
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case XDEV_COMP_MODE:
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return "Compliance mode";
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case XDEV_TEST_MODE:
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return "Test mode";
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case XDEV_RESUME:
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return "Resume";
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default:
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break;
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}
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return "Unknown";
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}
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static inline const char *xhci_decode_portsc(u32 portsc)
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{
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static char str[256];
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int ret;
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ret = sprintf(str, "%s %s %s Link:%s ",
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portsc & PORT_POWER ? "Powered" : "Powered-off",
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portsc & PORT_CONNECT ? "Connected" : "Not-connected",
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portsc & PORT_PE ? "Enabled" : "Disabled",
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xhci_portsc_link_state_string(portsc));
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if (portsc & PORT_OC)
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ret += sprintf(str + ret, "OverCurrent ");
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if (portsc & PORT_RESET)
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ret += sprintf(str + ret, "In-Reset ");
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ret += sprintf(str + ret, "Change: ");
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if (portsc & PORT_CSC)
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ret += sprintf(str + ret, "CSC ");
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if (portsc & PORT_PEC)
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ret += sprintf(str + ret, "PEC ");
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if (portsc & PORT_WRC)
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ret += sprintf(str + ret, "WRC ");
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if (portsc & PORT_OCC)
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ret += sprintf(str + ret, "OCC ");
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if (portsc & PORT_RC)
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ret += sprintf(str + ret, "PRC ");
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if (portsc & PORT_PLC)
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ret += sprintf(str + ret, "PLC ");
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if (portsc & PORT_CEC)
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ret += sprintf(str + ret, "CEC ");
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if (portsc & PORT_CAS)
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ret += sprintf(str + ret, "CAS ");
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ret += sprintf(str + ret, "Wake: ");
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if (portsc & PORT_WKCONN_E)
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ret += sprintf(str + ret, "WCE ");
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if (portsc & PORT_WKDISC_E)
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ret += sprintf(str + ret, "WDE ");
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if (portsc & PORT_WKOC_E)
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ret += sprintf(str + ret, "WOE ");
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return str;
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}
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static inline const char *xhci_ep_state_string(u8 state)
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{
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switch (state) {
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