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| author | Julius Werner <jwerner@chromium.org> | 2013-04-15 15:55:04 -0700 |
|---|---|---|
| committer | Sarah Sharp <sarah.a.sharp@linux.intel.com> | 2013-06-05 16:41:47 -0700 |
| commit | 01c5f4477d527732ecaf92d9b3d2201c8030000b (patch) | |
| tree | 408de03b6f45f1127290b49bb416bbb2dc35b5e7 /drivers/usb/host/xhci-dbg.c | |
| parent | 0c967e7ecdc2cf42853b4c76f0b2e94ba53c5b92 (diff) | |
| download | blackbird-op-linux-01c5f4477d527732ecaf92d9b3d2201c8030000b.tar.gz blackbird-op-linux-01c5f4477d527732ecaf92d9b3d2201c8030000b.zip | |
usb: xhci-dbg: Display endpoint number and direction in context dump
When CONFIG_XHCI_HCD_DEBUGGING is activated, the XHCI driver can dump
device and input contexts to the console. The endpoint contexts in that
dump are labeled "Endpoint N Context", where N is the XHCI endpoint
index (DCI - 1). This can be very confusing, especially for people who
are not that familiar with the XHCI specification. This patch introduces
an xhci_get_endpoint_address function (as a counterpart to the reverse
xhci_get_endpoint_index), and uses it to additionally display the
endpoint number and direction when dumping contexts, which are much more
commonly used concepts in USB.
Signed-off-by: Julius Werner <jwerner@chromium.org>
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Diffstat (limited to 'drivers/usb/host/xhci-dbg.c')
| -rw-r--r-- | drivers/usb/host/xhci-dbg.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/usb/host/xhci-dbg.c b/drivers/usb/host/xhci-dbg.c index 5f3a7c74aa8d..f2e7689e11a3 100644 --- a/drivers/usb/host/xhci-dbg.c +++ b/drivers/usb/host/xhci-dbg.c @@ -503,11 +503,14 @@ static void xhci_dbg_ep_ctx(struct xhci_hcd *xhci, if (last_ep < 31) last_ep_ctx = last_ep + 1; for (i = 0; i < last_ep_ctx; ++i) { + unsigned int epaddr = xhci_get_endpoint_address(i); struct xhci_ep_ctx *ep_ctx = xhci_get_ep_ctx(xhci, ctx, i); dma_addr_t dma = ctx->dma + ((unsigned long)ep_ctx - (unsigned long)ctx->bytes); - xhci_dbg(xhci, "Endpoint %02d Context:\n", i); + xhci_dbg(xhci, "%s Endpoint %02d Context (ep_index %02d):\n", + usb_endpoint_out(epaddr) ? "OUT" : "IN", + epaddr & USB_ENDPOINT_NUMBER_MASK, i); xhci_dbg(xhci, "@%p (virt) @%08llx (dma) %#08x - ep_info\n", &ep_ctx->ep_info, (unsigned long long)dma, ep_ctx->ep_info); |
