HiKeyPkg: reset i2c2 controller

Since i2c controller is in reset mode after system reset, i2c controller
can't work well in linux kernel. So release it from reset mode in UEFI.

Signed-off-by: Haojian Zhuang <haojian.zhuang@gmail.com>

4 files changed, 41 insertions, 0 deletions

diff --git a/HisiPkg/HiKeyPkg/Drivers/HiKeyDxe/HiKeyDxe.c b/HisiPkg/HiKeyPkg/Drivers/HiKeyDxe/HiKeyDxe.c
index 400efc47d..157baf4a8 100644
--- a/HisiPkg/HiKeyPkg/Drivers/HiKeyDxe/HiKeyDxe.c
+++ b/HisiPkg/HiKeyPkg/Drivers/HiKeyDxe/HiKeyDxe.c
@@ -175,6 +175,7 @@ HiKeyEntryPoint (
 
   HiKeyInitSerialNo ();
   HiKeyInitBootDevice ();
+  HiKeyInitPeripherals ();
 
   // Try to install the Flat Device Tree (FDT). This function actually installs the
   // UEFI Driver Binding Protocol.
diff --git a/HisiPkg/HiKeyPkg/Drivers/HiKeyDxe/HiKeyDxe.inf b/HisiPkg/HiKeyPkg/Drivers/HiKeyDxe/HiKeyDxe.inf
index d614a1b00..895bac682 100644
--- a/HisiPkg/HiKeyPkg/Drivers/HiKeyDxe/HiKeyDxe.inf
+++ b/HisiPkg/HiKeyPkg/Drivers/HiKeyDxe/HiKeyDxe.inf
@@ -22,6 +22,7 @@
 
 [Sources.common]
   HiKeyDxe.c
+  InitPeripherals.c
   InstallFdt.c
   InstallBootMenu.c
 
diff --git a/HisiPkg/HiKeyPkg/Drivers/HiKeyDxe/HiKeyDxeInternal.h b/HisiPkg/HiKeyPkg/Drivers/HiKeyDxe/HiKeyDxeInternal.h
index 26344ccad..82ff92d59 100644
--- a/HisiPkg/HiKeyPkg/Drivers/HiKeyDxe/HiKeyDxeInternal.h
+++ b/HisiPkg/HiKeyPkg/Drivers/HiKeyDxe/HiKeyDxeInternal.h
@@ -34,4 +34,9 @@ HiKeyBootMenuInstall (
   IN VOID
   );
 
+EFI_STATUS
+HiKeyInitPeripherals (
+  IN VOID
+  );
+
 #endif // __HIKEY_DXE_INTERNAL_H__
diff --git a/HisiPkg/HiKeyPkg/Drivers/HiKeyDxe/InitPeripherals.c b/HisiPkg/HiKeyPkg/Drivers/HiKeyDxe/InitPeripherals.c
new file mode 100644
index 000000000..c905dc6c6
--- /dev/null
+++ b/HisiPkg/HiKeyPkg/Drivers/HiKeyDxe/InitPeripherals.c
@@ -0,0 +1,34 @@
+/** @file
+*
+*  Copyright (c) 2015, Linaro Ltd. All rights reserved.
+*  Copyright (c) 2015, Hisilicon Ltd. All rights reserved.
+*
+*  This program and the accompanying materials
+*  are licensed and made available under the terms and conditions of the BSD License
+*  which accompanies this distribution.  The full text of the license may be found at
+*  http://opensource.org/licenses/bsd-license.php
+*
+*  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+*  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+*
+**/
+
+#include <Library/IoLib.h>
+
+#include "Hi6220RegsPeri.h"
+
+VOID
+EFIAPI
+HiKeyInitPeripherals (
+  IN VOID
+  )
+{
+  UINT32     Data;
+
+  /* make I2C2 out of reset */
+  MmioWrite32 (SC_PERIPH_RSTDIS3, PERIPH_RST3_I2C2);
+
+  do {
+    Data = MmioRead32 (SC_PERIPH_RSTSTAT3);
+  } while (Data & PERIPH_RST3_I2C2);
+}