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Commit 8ee10d62 authored by Alan Stern's avatar Alan Stern Committed by Greg Kroah-Hartman
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USB: EHCI: enhance "async" debugfs output 



This patch enhances the "async" debugfs file in ehci-hcd by printing
out several additional fields in the hardware-accessible data
structures.  These fields are important for determining the hardware's
view of the async schedule, in particular, the addresses of the
current and next qTDs for each QH along with the start address of each
qTD's data buffer.

Signed-off-by: default avatarAlan Stern <stern@rowland.harvard.edu>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent a016a816

drivers/usb/host/ehci-dbg.c

+11 −4
Original line number Diff line number Diff line
@@ -436,7 +436,8 @@ static void qh_lines ( 
	scratch = hc32_to_cpup(ehci, &hw->hw_info1);

	hw_curr = (mark == '*') ? hc32_to_cpup(ehci, &hw->hw_current) : 0;

	temp = scnprintf (next, size,

			"qh/%p dev%d %cs ep%d %08x %08x (%08x%c %s nak%d)",

			"qh/%p dev%d %cs ep%d %08x %08x (%08x%c %s nak%d)"

			" [cur %08x next %08x buf[0] %08x]",

			qh, scratch & 0x007f,

			speed_char (scratch),

			(scratch >> 8) & 0x000f,
@@ -444,7 +445,10 @@ static void qh_lines ( 
			hc32_to_cpup(ehci, &hw->hw_token), mark,

			(cpu_to_hc32(ehci, QTD_TOGGLE) & hw->hw_token)

				? "data1" : "data0",

			(hc32_to_cpup(ehci, &hw->hw_alt_next) >> 1) & 0x0f);

			(hc32_to_cpup(ehci, &hw->hw_alt_next) >> 1) & 0x0f,

			hc32_to_cpup(ehci, &hw->hw_current),

			hc32_to_cpup(ehci, &hw->hw_qtd_next),

			hc32_to_cpup(ehci, &hw->hw_buf[0]));

	size -= temp;

	next += temp;
@@ -464,7 +468,8 @@ static void qh_lines ( 
				mark = '/';

		}

		temp = snprintf (next, size,

				"\n\t%p%c%s len=%d %08x urb %p",

				"\n\t%p%c%s len=%d %08x urb %p"

				" [td %08x buf[0] %08x]",

				td, mark, ({ char *tmp;

				 switch ((scratch>>8)&0x03) {

				 case 0: tmp = "out"; break;
@@ -474,7 +479,9 @@ static void qh_lines ( 
				 } tmp;}),

				(scratch >> 16) & 0x7fff,

				scratch,

				td->urb);

				td->urb,

				(u32) td->qtd_dma,

				hc32_to_cpup(ehci, &td->hw_buf[0]));

		if (size < temp)

			temp = size;

		size -= temp;