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MdeModulePkg/EhciDxe: factor out EhcIsDebugPortInUse()

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The EhcReset(), EhcGetRootHubPortStatus() and EhcDriverBindingStart()
functions need to see whether the host controller (or a specific port on
the host controller) can be accessed, dependent on the controller having
(or the specific port being) an in-use debug port. Because the condition
isn't simple, extract it to a separate function.

Cc: Ruiyu Ni <ruiyu.ni@intel.com>
Cc: Star Zeng <star.zeng@intel.com>
Suggested-by: Star Zeng <star.zeng@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Laszlo Ersek <lersek@redhat.com>
Reviewed-by: Star Zeng <star.zeng@intel.com>
This commit is contained in:
Laszlo Ersek
2018-09-05 19:06:19 +02:00
parent 22cf747fcf
commit b48ec0e8ab
4 changed files with 80 additions and 30 deletions
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2
MdeModulePkg/Bus/Pci/EhciDxe/Ehci.h
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@@ -77,6 +77,8 @@ typedef struct _USB2_HC_DEV USB2_HC_DEV;
#define USB_DEBUG_PORT_IN_USE BIT10
#define USB_DEBUG_PORT_ENABLE BIT28
#define USB_DEBUG_PORT_OWNER BIT30
#define USB_DEBUG_PORT_IN_USE_MASK (USB_DEBUG_PORT_IN_USE | \
USB_DEBUG_PORT_OWNER)
//
// EHC raises TPL to TPL_NOTIFY to serialize all its operations