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| author | Lu Baolu <baolu.lu@linux.intel.com> | 2015-08-06 18:24:00 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-08-09 00:16:00 +0200 |
| commit | 79b8094f60d8ce54ee76e631ab665c5e3012e6ba (patch) | |
| tree | ada7b0d94b79af3555e5c6875f4dfe620a4b09bc /drivers/usb/host/xhci-dbg.c | |
| parent | usb: xhci: Add support for URB_ZERO_PACKET to bulk/sg transfers (diff) | |
| download | linux-79b8094f60d8ce54ee76e631ab665c5e3012e6ba.tar.xz linux-79b8094f60d8ce54ee76e631ab665c5e3012e6ba.zip | |
xhci: xHCI 1.1: Contiguous Frame ID Capability (CFC)
If the Contiguous Frame ID Capability is supported (CFC = 1),
then the xHC shall match the Frame ID in every Isoch TD with
SIA = 0 against the Frame Index of the MFINDEX register. This
rule ensures resynchronization of Isoch TDs even if some are
dropped due to Missed Service Errors or Stopping the endpoint.
This patch enables xHCI driver to support CFC by calculating
and setting the Frame ID field of an Isoch TRB.
[made some dbg messages checkpatch friendly -Mathias]
Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/host/xhci-dbg.c')
| -rw-r--r-- | drivers/usb/host/xhci-dbg.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/usb/host/xhci-dbg.c b/drivers/usb/host/xhci-dbg.c index 745717ec9c89..c867ecbeaa60 100644 --- a/drivers/usb/host/xhci-dbg.c +++ b/drivers/usb/host/xhci-dbg.c @@ -99,6 +99,8 @@ static void xhci_print_cap_regs(struct xhci_hcd *xhci) xhci_dbg(xhci, "HCC PARAMS 0x%x:\n", (unsigned int) temp); xhci_dbg(xhci, " HC generates %s bit addresses\n", HCC_64BIT_ADDR(temp) ? "64" : "32"); + xhci_dbg(xhci, " HC %s Contiguous Frame ID Capability\n", + HCC_CFC(temp) ? "has" : "hasn't"); /* FIXME */ xhci_dbg(xhci, " FIXME: more HCCPARAMS debugging\n"); |