Hello.
On 4/12/2016 2:10 PM, changbin.du@xxxxxxxxx wrote:
From: "Du, Changbin" <changbin.du@xxxxxxxxx>
For DWC3 USB controller, the Global Debug Queue/FIFO Space Available
Register(GDBGFIFOSPACE) can be used to dump FIFO/Queue available space.
Space needed before (.
This can be used to check some special issues, like whether data is
successfully copied from memory to fifo when a trb is blocked.
Signed-off-by: Du, Changbin <changbin.du@xxxxxxxxx>
---
v4:
Do not fail silently, but print error.
[...]
diff --git a/drivers/usb/dwc3/debugfs.c b/drivers/usb/dwc3/debugfs.c
index 615d4dc..83e5bc1 100644
--- a/drivers/usb/dwc3/debugfs.c
+++ b/drivers/usb/dwc3/debugfs.c
[...]
@@ -642,10 +681,15 @@ void dwc3_debugfs_init(struct dwc3 *dwc)
dwc->regset->nregs = ARRAY_SIZE(dwc3_regs);
dwc->regset->base = dwc->regs;
+
Why?
file = debugfs_create_regset32("regdump", S_IRUGO, root, dwc->regset);
if (!file)
dev_err(dwc->dev, "Can't create debugfs regdump\n");
+ file = debugfs_create_file("fifo", S_IRUGO, root, dwc, &dwc3_fifo_fops);
+ if (!file)
+ dev_err(dwc->dev, "Can't create debugfs fifo\n");
+
if (IS_ENABLED(CONFIG_USB_DWC3_DUAL_ROLE)) {
file = debugfs_create_file("mode", S_IRUGO | S_IWUSR, root,
dwc, &dwc3_mode_fops);
MBR, Sergei
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