USB: xhci: Print NEC firmware version.

The NEC xHCI host controller firmware version can be found by putting a
vendor-specific command on the command ring and extracting the BCD
encoded-version out of the vendor-specific event TRB.

The firmware version debug line in dmesg will look like:

xhci_hcd 0000:05:00.0: NEC firmware version 30.21

(NEC merged with Renesas Technologies and became Renesas Electronics on
April 1, 2010.  I have their OK to merge this vendor-specific code.)

Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Cc: Satoshi Otani <satoshi.otani.xm@renesas.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 5 insertions, 0 deletions

diff --git a/drivers/usb/host/xhci.c b/drivers/usb/host/xhci.c
index 8a49c6716b69..27345cd04da0 100644
--- a/drivers/usb/host/xhci.c
+++ b/drivers/usb/host/xhci.c
@@ -486,6 +486,9 @@ int xhci_run(struct usb_hcd *hcd)
 
         if (NUM_TEST_NOOPS > 0)
                 doorbell = xhci_setup_one_noop(xhci);
+        if (xhci->quirks & XHCI_NEC_HOST)
+                xhci_queue_vendor_command(xhci, 0, 0, 0,
+                                TRB_TYPE(TRB_NEC_GET_FW));
 
         if (xhci_start(xhci)) {
                 xhci_halt(xhci);
@@ -495,6 +498,8 @@ int xhci_run(struct usb_hcd *hcd)
         xhci_dbg(xhci, "// @%p = 0x%x\n", &xhci->op_regs->command, temp);
         if (doorbell)
                 (*doorbell)(xhci);
+        if (xhci->quirks & XHCI_NEC_HOST)
+                xhci_ring_cmd_db(xhci);
 
         xhci_dbg(xhci, "Finished xhci_run\n");
         return 0;