Configure GPIO expanders in PEI phase
1) Configure all GPIO expander pins connected to Reset Button as inputs
2) Configure muxes for I2C to route I2C bus to Arduino Header
Cc: Kelly Steele <kelly.ste...@intel.com>
Cc: Jiewen Yao <jiewen....@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Michael Kinney <michael.d.kin...@intel.com>
---
.../Platform/Pei/PlatformInit/CommonHeader.h | 3 +-
.../Platform/Pei/PlatformInit/PlatformEarlyInit.c | 214 ++++++++++++++++++++-
.../Pei/PlatformInit/PlatformEarlyInit.inf | 3 +-
3 files changed, 217 insertions(+), 3 deletions(-)
diff --git a/QuarkPlatformPkg/Platform/Pei/PlatformInit/CommonHeader.h
b/QuarkPlatformPkg/Platform/Pei/PlatformInit/CommonHeader.h
index 3630f34..9828495 100644
--- a/QuarkPlatformPkg/Platform/Pei/PlatformInit/CommonHeader.h
+++ b/QuarkPlatformPkg/Platform/Pei/PlatformInit/CommonHeader.h
@@ -3,7 +3,7 @@ Common header file shared by all source files.
This file includes package header files, library classes and protocol, PPI &
GUID definitions.
-Copyright (c) 2013 Intel Corporation.
+Copyright (c) 2013 - 2016 Intel Corporation.
This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD
License
@@ -78,6 +78,7 @@ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER
EXPRESS OR IMPLIED.
#include <Library/QNCAccessLib.h>
#include <Library/PlatformHelperLib.h>
#include <Library/PlatformPcieHelperLib.h>
+#include <Library/I2cLib.h>
#include <Register/Cpuid.h>
diff --git a/QuarkPlatformPkg/Platform/Pei/PlatformInit/PlatformEarlyInit.c
b/QuarkPlatformPkg/Platform/Pei/PlatformInit/PlatformEarlyInit.c
index 32ae3e0..756cc4a 100644
--- a/QuarkPlatformPkg/Platform/Pei/PlatformInit/PlatformEarlyInit.c
+++ b/QuarkPlatformPkg/Platform/Pei/PlatformInit/PlatformEarlyInit.c
@@ -6,7 +6,7 @@ This PEIM initialize platform for MRC, following action is
performed,
4. Calls MRC to initialize memory and install a PPI notify to do post memory
initialization.
This file contains the main entrypoint of the PEIM.
-Copyright (c) 2013 Intel Corporation.
+Copyright (c) 2013 - 2016 Intel Corporation.
This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD
License
@@ -193,6 +193,212 @@ SetLanControllerMacAddr (
}
/**
+ Initialize state of I2C GPIO expanders.
+
+ @param PlatformType Platform type for GPIO expander init.
+
+**/
+EFI_STATUS
+EarlyPlatformConfigGpioExpanders (
+ IN CONST EFI_PLATFORM_TYPE PlatformType
+ )
+{
+ EFI_STATUS Status;
+ EFI_I2C_DEVICE_ADDRESS I2CSlaveAddress;
+ UINTN Length;
+ UINTN ReadLength;
+ UINT8 Buffer[2];
+
+ //
+ // Configure GPIO expanders for Galileo Gen 2
+ // Route I2C pins to Arduino header
+ // Set all GPIO expander pins connected to the Reset Button as inputs
+ //
+ if (PlatformType == GalileoGen2) {
+ //
+ // Configure AMUX1_IN (EXP2.P1_4) as an output
+ //
+ PlatformPcal9555GpioSetDir (
+ GALILEO_GEN2_IOEXP2_7BIT_SLAVE_ADDR, // IO Expander 2.
+ 12, // P1-4.
+ FALSE // Configure as output
+ );
+
+ //
+ // Set AMUX1_IN(EXP2.P1_4) low to route I2C to Arduino Shield connector
+ //
+ PlatformPcal9555GpioSetLevel (
+ GALILEO_GEN2_IOEXP2_7BIT_SLAVE_ADDR, // IO Expander 2.
+ 12, // P1-4.
+ FALSE // Set pin low
+ );
+
+ //
+ // Configure Reset Button(EXP1.P1_7) as an input
+ //
+ PlatformPcal9555GpioSetDir (
+ GALILEO_GEN2_IOEXP1_7BIT_SLAVE_ADDR, // IO Expander 1.
+ 15, // P1-7.
+ TRUE
+ );
+
+ //
+ // Disable pullup on Reset Button(EXP1.P1_7)
+ //
+ PlatformPcal9555GpioDisablePull (
+ GALILEO_GEN2_IOEXP1_7BIT_SLAVE_ADDR, // IO Expander 1.
+ 15 // P1-7.
+ );
+
+ //
+ // Configure Reset Button(EXP2.P1_7) as an input
+ //
+ PlatformPcal9555GpioSetDir (
+ GALILEO_GEN2_IOEXP2_7BIT_SLAVE_ADDR, // IO Expander 2.
+ 15, // P1-7.
+ TRUE
+ );
+
+ //
+ // Disable pullup on Reset Button(EXP2.P1_7)
+ //
+ PlatformPcal9555GpioDisablePull (
+ GALILEO_GEN2_IOEXP2_7BIT_SLAVE_ADDR, // IO Expander 2.
+ 15 // P1-7.
+ );
+ }
+
+ //
+ // Configure GPIO expanders for Galileo Gen 2
+ // Set all GPIO expander pins connected to the Reset Button as inputs
+ // Route I2C pins to Arduino header
+ //
+ if (PlatformType == Galileo) {
+ //
+ // Detect the I2C Slave Address of the GPIO Expander
+ //
+ if (PlatformLegacyGpioGetLevel (R_QNC_GPIO_RGLVL_RESUME_WELL,
GALILEO_DETERMINE_IOEXP_SLA_RESUMEWELL_GPIO)) {
+ I2CSlaveAddress.I2CDeviceAddress = GALILEO_IOEXP_J2HI_7BIT_SLAVE_ADDR;
+ } else {
+ I2CSlaveAddress.I2CDeviceAddress = GALILEO_IOEXP_J2LO_7BIT_SLAVE_ADDR;
+ }
+ DEBUG ((EFI_D_INFO, "Galileo GPIO Expender Slave Address = %02x\n",
I2CSlaveAddress.I2CDeviceAddress));
+
+ //
+ // Set I2C_MUX (GPORT1_BIT5) low to route I2C to Arduino Shield connector
+ //
+
+ //
+ // Select GPIO Expander GPORT1
+ //
+ Length = 2;
+ Buffer[0] = 0x18; //sub-address
+ Buffer[1] = 0x01; //data
+ Status = I2cWriteMultipleByte (
+ I2CSlaveAddress,
+ EfiI2CSevenBitAddrMode,
+ &Length,
+ &Buffer
+ );
+ ASSERT_EFI_ERROR (Status);
+
+ //
+ // Read "Pin Direction" of GPIO Expander GPORT1
+ //
+ Length = 1;
+ ReadLength = 1;
+ Buffer[1] = 0x1C;
+ Status = I2cReadMultipleByte (
+ I2CSlaveAddress,
+ EfiI2CSevenBitAddrMode,
+ &Length,
+ &ReadLength,
+ &Buffer[1]
+ );
+ ASSERT_EFI_ERROR (Status);
+
+ //
+ // Configure GPIO Expander GPORT1_BIT5 as an output
+ //
+ Length = 2;
+ Buffer[0] = 0x1C; //sub-address
+ Buffer[1] = (UINT8)(Buffer[1] & (~BIT5)); //data
+
+ Status = I2cWriteMultipleByte (
+ I2CSlaveAddress,
+ EfiI2CSevenBitAddrMode,
+ &Length,
+ &Buffer
+ );
+ ASSERT_EFI_ERROR (Status);
+
+ //
+ // Set GPIO Expander GPORT1_BIT5 low
+ //
+ Length = 2;
+ Buffer[0] = 0x09; //sub-address
+ Buffer[1] = (UINT8)(~BIT5); //data
+
+ Status = I2cWriteMultipleByte (
+ I2CSlaveAddress,
+ EfiI2CSevenBitAddrMode,
+ &Length,
+ &Buffer
+ );
+ ASSERT_EFI_ERROR (Status);
+
+ //
+ // Configure RESET_N_SHLD (GPORT5_BIT0) and SW_RESET_N_SHLD (GPORT5_BIT1)
as inputs
+ //
+
+ //
+ // Select GPIO Expander GPORT5
+ //
+ Length = 2;
+ Buffer[0] = 0x18;
+ Buffer[1] = 0x05;
+ Status = I2cWriteMultipleByte (
+ I2CSlaveAddress,
+ EfiI2CSevenBitAddrMode,
+ &Length,
+ &Buffer
+ );
+ ASSERT_EFI_ERROR (Status);
+
+ //
+ // Read "Pin Direction" of GPIO Expander GPORT5
+ //
+ Length = 1;
+ ReadLength = 1;
+ Buffer[1] = 0x1C;
+ Status = I2cReadMultipleByte (
+ I2CSlaveAddress,
+ EfiI2CSevenBitAddrMode,
+ &Length,
+ &ReadLength,
+ &Buffer[1]
+ );
+ ASSERT_EFI_ERROR (Status);
+
+ //
+ // Configure GPIO Expander GPORT5_BIT0 and GPORT5_BIT1 as inputs
+ //
+ Length = 2;
+ Buffer[0] = 0x1C;
+ Buffer[1] = Buffer[1] | BIT0 | BIT1;
+ Status = I2cWriteMultipleByte (
+ I2CSlaveAddress,
+ EfiI2CSevenBitAddrMode,
+ &Length,
+ &Buffer
+ );
+ ASSERT_EFI_ERROR (Status);
+ }
+
+ return EFI_SUCCESS;
+}
+
+/**
This is the entrypoint of PEIM
@param FileHandle Handle of the file being invoked.
@@ -305,6 +511,12 @@ PeiInitPlatform (
PlatformErratasPostMrc ();
//
+ //
+ //
+ DEBUG ((EFI_D_INFO, "EarlyPlatformConfigGpioExpanders ()\n"));
+ EarlyPlatformConfigGpioExpanders (PlatformType);
+
+ //
// Now that all of the pre-permanent memory activities have
// been taken care of, post a call-back for the permanent-memory
// resident services, such as HOB construction.
diff --git a/QuarkPlatformPkg/Platform/Pei/PlatformInit/PlatformEarlyInit.inf
b/QuarkPlatformPkg/Platform/Pei/PlatformInit/PlatformEarlyInit.inf
index dd373de..1de8efd 100644
--- a/QuarkPlatformPkg/Platform/Pei/PlatformInit/PlatformEarlyInit.inf
+++ b/QuarkPlatformPkg/Platform/Pei/PlatformInit/PlatformEarlyInit.inf
@@ -36,7 +36,7 @@
# memory specific stuff like build memory map, build
# resource description hob for DXE phase,etc.
# Bootmode.c - Detect boot mode.
-# Copyright (c) 2013 Intel Corporation.
+# Copyright (c) 2013 - 2016 Intel Corporation.
#
# This program and the accompanying materials
# are licensed and made available under the terms and conditions of the BSD
License
@@ -110,6 +110,7 @@
QNCAccessLib
PlatformHelperLib
PlatformPcieHelperLib
+ I2cLib
[Guids]
gEfiMemoryConfigDataGuid # ALWAYS_CONSUMED
L"MemoryConfig"
--
2.6.3.windows.1
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