MdeMdeModulePkg/Usb: two tunings for better device identification behind hub

1.enlarge the recovery time from 10ms to 20ms after port reset to make set address request success for better device compatibility.
2.another enhancement is to use RESET_C bit rather than RESET bit to judge if hub reset port operation is done.


Signed-off-by: Feng Tian <feng.tian@intel.com>
Reviewed-by: Elvin Li <elvin.li@intel.com>


git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@14227 6f19259b-4bc3-4df7-8a09-765794883524

3 files changed, 21 insertions, 6 deletions

diff --git a/MdeModulePkg/Bus/Usb/UsbBusDxe/UsbBus.c b/MdeModulePkg/Bus/Usb/UsbBusDxe/UsbBus.c
index 742cdc1931..ff6b99c87f 100644
--- a/MdeModulePkg/Bus/Usb/UsbBusDxe/UsbBus.c
+++ b/MdeModulePkg/Bus/Usb/UsbBusDxe/UsbBus.c
@@ -813,6 +813,7 @@ UsbIoPortReset (
   USB_DEVICE              *Dev;

   EFI_TPL                 OldTpl;

   EFI_STATUS              Status;

+  UINT8                   DevAddress;

 

   OldTpl = gBS->RaiseTPL (USB_BUS_TPL);

 

@@ -834,12 +835,17 @@ UsbIoPortReset (
     goto ON_EXIT;

   }

 

+  HubIf->HubApi->ClearPortChange (HubIf, Dev->ParentPort);

+

   //

   // Reset the device to its current address. The device now has an address

   // of ZERO after port reset, so need to set Dev->Address to the device again for

   // host to communicate with it.

   //

-  Status  = UsbSetAddress (Dev, Dev->Address);

+  DevAddress   = Dev->Address;

+  Dev->Address = 0;

+  Status  = UsbSetAddress (Dev, DevAddress);

+  Dev->Address = DevAddress;

 

   gBS->Stall (USB_SET_DEVICE_ADDRESS_STALL);

   

diff --git a/MdeModulePkg/Bus/Usb/UsbBusDxe/UsbBus.h b/MdeModulePkg/Bus/Usb/UsbBusDxe/UsbBus.h
index 094aea21cd..d503a278a4 100644
--- a/MdeModulePkg/Bus/Usb/UsbBusDxe/UsbBus.h
+++ b/MdeModulePkg/Bus/Usb/UsbBusDxe/UsbBus.h
@@ -99,10 +99,19 @@ typedef struct _USB_HUB_API    USB_HUB_API;
 // [USB20-7.1.7.5, it says 10ms for hub and 50ms for

 // root hub]

 //

-#define USB_SET_PORT_RESET_STALL       (10 * USB_BUS_1_MILLISECOND)

+// According to USB2.0, Chapter 11.5.1.5 Resetting,

+// the worst case for TDRST is 20ms

+//

+#define USB_SET_PORT_RESET_STALL       (20 * USB_BUS_1_MILLISECOND)

 #define USB_SET_ROOT_PORT_RESET_STALL  (50 * USB_BUS_1_MILLISECOND)

 

 //

+// Wait for port recovery to accept SetAddress, refers to specification

+// [USB20-7.1.7.5, it says 10 ms for TRSTRCY]

+//

+#define USB_SET_PORT_RECOVERY_STALL    (10 * USB_BUS_1_MILLISECOND)

+

+//

 // Wait for clear roothub port reset, set by experience

 //

 #define USB_CLR_ROOT_PORT_RESET_STALL  (20 * USB_BUS_1_MILLISECOND)

diff --git a/MdeModulePkg/Bus/Usb/UsbBusDxe/UsbHub.c b/MdeModulePkg/Bus/Usb/UsbBusDxe/UsbHub.c
index 2d24bb4b8a..9e5299c0ef 100644
--- a/MdeModulePkg/Bus/Usb/UsbBusDxe/UsbHub.c
+++ b/MdeModulePkg/Bus/Usb/UsbBusDxe/UsbHub.c
@@ -975,13 +975,13 @@ UsbHubResetPort (
   }

 

   //

-  // Drive the reset signal for at least 10ms. Check USB 2.0 Spec

+  // Drive the reset signal for worst 20ms. Check USB 2.0 Spec

   // section 7.1.7.5 for timing requirements.

   //

   gBS->Stall (USB_SET_PORT_RESET_STALL);

 

   //

-  // USB hub will clear RESET bit if reset is actually finished.

+  // Check USB_PORT_STAT_C_RESET bit to see if the resetting state is done.

   //

   ZeroMem (&PortState, sizeof (EFI_USB_PORT_STATUS));

 

@@ -989,8 +989,8 @@ UsbHubResetPort (
     Status = UsbHubGetPortStatus (HubIf, Port, &PortState);

 

     if (!EFI_ERROR (Status) &&

-        !USB_BIT_IS_SET (PortState.PortStatus, USB_PORT_STAT_RESET)) {

-

+        USB_BIT_IS_SET (PortState.PortChangeStatus, USB_PORT_STAT_C_RESET)) {

+      gBS->Stall (USB_SET_PORT_RECOVERY_STALL);

       return EFI_SUCCESS;

     }