Re: [edk2] [patch] MdeModulePkg/XhciPei: 1ms delay before accessing MMIO reg in reset

2016-09-13 Thread Zeng, Star 
Reviewed-by: Star Zeng 

-Original Message-
From: Tian, Feng 
Sent: Wednesday, September 14, 2016 9:49 AM
To: Zeng, Star 
Cc: edk2-devel@lists.01.org
Subject: [patch] MdeModulePkg/XhciPei: 1ms delay before accessing MMIO reg in 
reset

Some XHCI HCs require to have 1ms delay before accessing any MMIO register in 
reset.

Cc: Star Zeng 
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Feng Tian 
---
 MdeModulePkg/Bus/Pci/XhciPei/XhcPeim.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/MdeModulePkg/Bus/Pci/XhciPei/XhcPeim.c 
b/MdeModulePkg/Bus/Pci/XhciPei/XhcPeim.c
index a58739f..cd5c5cd 100644
--- a/MdeModulePkg/Bus/Pci/XhciPei/XhcPeim.c
+++ b/MdeModulePkg/Bus/Pci/XhciPei/XhcPeim.c
@@ -407,6 +407,7 @@ XhcPeiResetHC (
   }
 
   XhcPeiSetOpRegBit (Xhc, XHC_USBCMD_OFFSET, XHC_USBCMD_RESET);
+  MicroSecondDelay (1000);
   Status = XhcPeiWaitOpRegBit (Xhc, XHC_USBCMD_OFFSET, XHC_USBCMD_RESET, 
FALSE, Timeout);
 ON_EXIT:
   DEBUG ((EFI_D_INFO, "XhcPeiResetHC: %r\n", Status));
--
2.7.1.windows.2

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[edk2] [patch] MdeModulePkg/XhciPei: 1ms delay before accessing MMIO reg in reset

2016-09-13 Thread Feng Tian 
Some XHCI HCs require to have 1ms delay before accessing any MMIO
register in reset.

Cc: Star Zeng 
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Feng Tian 
---
 MdeModulePkg/Bus/Pci/XhciPei/XhcPeim.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/MdeModulePkg/Bus/Pci/XhciPei/XhcPeim.c 
b/MdeModulePkg/Bus/Pci/XhciPei/XhcPeim.c
index a58739f..cd5c5cd 100644
--- a/MdeModulePkg/Bus/Pci/XhciPei/XhcPeim.c
+++ b/MdeModulePkg/Bus/Pci/XhciPei/XhcPeim.c
@@ -407,6 +407,7 @@ XhcPeiResetHC (
   }
 
   XhcPeiSetOpRegBit (Xhc, XHC_USBCMD_OFFSET, XHC_USBCMD_RESET);
+  MicroSecondDelay (1000);
   Status = XhcPeiWaitOpRegBit (Xhc, XHC_USBCMD_OFFSET, XHC_USBCMD_RESET, 
FALSE, Timeout);
 ON_EXIT:
   DEBUG ((EFI_D_INFO, "XhcPeiResetHC: %r\n", Status));
-- 
2.7.1.windows.2

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