Commit 2e77a825 authored by Mathias Nyman's avatar Mathias Nyman Committed by Greg Kroah-Hartman
Browse files

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: default avatarMathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 7344ee32

drivers/usb/host/xhci.h

+81 −0
Original line number Diff line number Diff line
@@ -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) {