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authorLu Baolu <baolu.lu@linux.intel.com>2017-10-05 11:21:39 +0300
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2017-10-05 12:01:57 +0300
commit02b6fdc2a153e61b957937772a562fb6357dc861 (patch)
treea9a1fdeb3ea45bdecbd34487d8a9a1368d4e8f1c /drivers/usb/host/Makefile
parent8f11487719401e20ecc58c114d9fc3177535c40a (diff)
downloadlinux-02b6fdc2a153e61b957937772a562fb6357dc861.tar.xz
usb: xhci: Add debugfs interface for xHCI driver
This adds debugfs consumer for xHCI driver. The debugfs entries read all host registers, device/endpoint contexts, command ring, event ring and various endpoint rings. With these entries, users can check the registers and memory spaces used by a host during run time, or save all the information with a simple 'cp -r' for post-mortem programs. The file hierarchy looks like this. [root of debugfs] |__usb |____[e,u,o]hci <---------[root for other HCIs] |____xhci <---------------[root for xHCI] |______0000:00:14.0 <--------------[xHCI host name] |________reg-cap <--------[capability registers] |________reg-op <-------[operational registers] |________reg-runtime <-----------[runtime registers] |________reg-ext-#cap_name <----[extended capability regs] |________command-ring <-------[root for command ring] |__________cycle <------------------[ring cycle] |__________dequeue <--------[ring dequeue pointer] |__________enqueue <--------[ring enqueue pointer] |__________trbs <-------------------[ring trbs] |________event-ring <---------[root for event ring] |__________cycle <------------------[ring cycle] |__________dequeue <--------[ring dequeue pointer] |__________enqueue <--------[ring enqueue pointer] |__________trbs <-------------------[ring trbs] |________devices <------------[root for devices] |__________#slot_id <-----------[root for a device] |____________name <-----------------[device name] |____________slot-context <----------------[slot context] |____________ep-context <-----------[endpoint contexts] |____________ep#ep_index <--------[root for an endpoint] |______________cycle <------------------[ring cycle] |______________dequeue <--------[ring dequeue pointer] |______________enqueue <--------[ring enqueue pointer] |______________trbs <-------------------[ring trbs] 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/Makefile')
-rw-r--r--drivers/usb/host/Makefile4
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/usb/host/Makefile b/drivers/usb/host/Makefile
index cf2691fffcc0..b2a7f058cccb 100644
--- a/drivers/usb/host/Makefile
+++ b/drivers/usb/host/Makefile
@@ -25,6 +25,10 @@ ifneq ($(CONFIG_USB_XHCI_RCAR), )
xhci-plat-hcd-y += xhci-rcar.o
endif
+ifneq ($(CONFIG_DEBUG_FS),)
+ xhci-hcd-y += xhci-debugfs.o
+endif
+
obj-$(CONFIG_USB_WHCI_HCD) += whci/
obj-$(CONFIG_USB_PCI) += pci-quirks.o