From: Chris Co <Christopher.Co@microsoft.com>
To: "edk2-devel@lists.01.org" <edk2-devel@lists.01.org>
Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>,
Leif Lindholm <leif.lindholm@linaro.org>,
Michael D Kinney <michael.d.kinney@intel.com>
Subject: [PATCH edk2-platforms 3/7] Silicon/NXP: Add I2C library support for iMX platforms
Date: Thu, 19 Jul 2018 04:11:21 +0000 [thread overview]
Message-ID: <20180719041103.9072-4-christopher.co@microsoft.com> (raw)
In-Reply-To: <20180719041103.9072-1-christopher.co@microsoft.com>
This adds support for I2C controller on NXP i.MX platforms.
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Christopher Co <christopher.co@microsoft.com>
Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: Leif Lindholm <leif.lindholm@linaro.org>
Cc: Michael D Kinney <michael.d.kinney@intel.com>
---
Silicon/NXP/iMXPlatformPkg/Include/iMXI2cLib.h | 158 ++++++
Silicon/NXP/iMXPlatformPkg/Library/iMXI2cLib/iMXI2cLib.c | 524 ++++++++++++++++++++
Silicon/NXP/iMXPlatformPkg/Library/iMXI2cLib/iMXI2cLib.inf | 35 ++
3 files changed, 717 insertions(+)
diff --git a/Silicon/NXP/iMXPlatformPkg/Include/iMXI2cLib.h b/Silicon/NXP/iMXPlatformPkg/Include/iMXI2cLib.h
new file mode 100644
index 000000000000..e0688d7aa89f
--- /dev/null
+++ b/Silicon/NXP/iMXPlatformPkg/Include/iMXI2cLib.h
@@ -0,0 +1,158 @@
+/** @file
+*
+* Copyright (c) Microsoft Corporation. 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.
+*
+**/
+
+#ifndef _IMX_I2C_H_
+#define _IMX_I2C_H_
+
+#pragma pack(push, 1)
+
+typedef union {
+ UINT16 AsUint16;
+ struct {
+ UINT16 Reserved0 : 1;
+ UINT16 ADR : 7;
+ UINT16 Reserved1 : 8;
+ };
+} IMX_I2C_IADR_REG;
+
+typedef union {
+ UINT16 AsUint16;
+ struct {
+ UINT16 IC : 6;
+ UINT16 Reserved0 : 10;
+ };
+} IMX_I2C_IFDR_REG;
+
+
+typedef union {
+ UINT16 AsUint16;
+ struct {
+ UINT16 Reserved0 : 2;
+ UINT16 RSTA : 1;
+ UINT16 TXAK : 1;
+ UINT16 MTX : 1;
+ UINT16 MSTA : 1;
+ UINT16 IIEN : 1;
+ UINT16 IEN : 1;
+ UINT16 Reserved1 : 8;
+ };
+} IMX_I2C_I2CR_REG;
+
+#define IMX_I2C_I2SR_RXAK 0x0001
+#define IMX_I2C_I2SR_IIF 0x0002
+#define IMX_I2C_I2SR_SRW 0x0004
+#define IMX_I2C_I2SR_IAL 0x0010
+#define IMX_I2C_I2SR_IBB 0x0020
+#define IMX_I2C_I2SR_IAAS 0x0040
+#define IMX_I2C_I2SR_ICF 0x0080
+
+typedef union {
+ UINT16 AsUint16;
+ struct {
+ UINT16 RXAK : 1;
+ UINT16 IIF : 1;
+ UINT16 SRW : 1;
+ UINT16 Reserved0 : 1;
+ UINT16 IAL : 1;
+ UINT16 IBB : 1;
+ UINT16 IAAS : 1;
+ UINT16 ICF : 1;
+ UINT16 Reserved1 : 8;
+ };
+} IMX_I2C_I2SR_REG;
+
+typedef union {
+ UINT16 AsUint16;
+ struct {
+ UINT16 DATA : 8;
+ UINT16 Reserved0 : 8;
+ };
+} IMX_I2C_I2DR_REG;
+
+typedef struct {
+ IMX_I2C_IADR_REG IADR;
+ UINT16 Pad0;
+ IMX_I2C_IFDR_REG IFDR;
+ UINT16 Pad1;
+ IMX_I2C_I2CR_REG I2CR;
+ UINT16 Pad2;
+ IMX_I2C_I2DR_REG I2SR;
+ UINT16 Pad3;
+ IMX_I2C_I2DR_REG I2DR;
+ UINT16 Pad4;
+} IMX_I2C_REGS;
+
+#pragma pack(pop)
+
+typedef struct {
+ UINT32 ControllerAddress;
+ UINT32 ControllerSlaveAddress;
+ UINT32 ReferenceFreq;
+ UINT32 TargetFreq;
+ UINT32 SlaveAddress;
+ UINT32 TimeoutInUs;
+} IMX_I2C_CONFIG;
+
+/** Performs i2c read operation.
+
+ The iMXI2cRead perform i2c read operation by programming the i2c controller.
+ The caller is responsible to provide i2c controller configuration.
+
+ @param[in] IMX_I2C_CONFIG* Structure containing the targeted i2c controller
+ to be used for i2c operation. The structure contains important information
+ such as the controller base address, reference frequency.
+ @param[in] RegisterAddress Targeted device register address to start read.
+ @param[out] ReadBufferPtr Caller supplied buffer that would be written into
+ with data from the read operation.
+ @param[in] ReadBufferSize Size of caller supplied buffer.
+
+ @retval EFI_SUCCESS i2c Read operation succeed.
+ @retval !EFI_SUCCESS Failure.
+
+--*/
+RETURN_STATUS
+iMXI2cRead (
+ IN IMX_I2C_CONFIG* I2cConfigPtr,
+ IN UINT8 RegisterAddress,
+ OUT UINT8* ReadBufferPtr,
+ IN UINT32 ReadBufferSize
+ );
+
+/** Performs i2c write operation.
+
+ The iMXI2cWrite perform i2c write operation by programming the i2c
+ controller. The caller is responsible to provide i2c controller
+ configuration.
+
+ @param[in] IMX_I2C_CONFIG* Structure containing the targeted i2c controller
+ to be used for i2c operation. The structure contains important information
+ such as the controller base address, reference frequency.
+ @param[in] RegisterAddress Targeted device register address to start write.
+ @param[out] WriteBufferPtr Caller supplied buffer that contained data that
+ would be read from for i2c write operation..
+ @param[in] WriteBufferSize Size of caller supplied buffer.
+
+ @retval EFI_SUCCESS i2c Write operation succeed.
+ @retval !EFI_SUCCESS Failure.
+
+--*/
+RETURN_STATUS
+iMXI2cWrite (
+ IN IMX_I2C_CONFIG* I2cConfigPtr,
+ IN UINT8 RegisterAddress,
+ IN UINT8* WriteBufferPtr,
+ IN UINT32 WriteBufferSize
+ );
+
+#endif
diff --git a/Silicon/NXP/iMXPlatformPkg/Library/iMXI2cLib/iMXI2cLib.c b/Silicon/NXP/iMXPlatformPkg/Library/iMXI2cLib/iMXI2cLib.c
new file mode 100644
index 000000000000..00da831ae6b6
--- /dev/null
+++ b/Silicon/NXP/iMXPlatformPkg/Library/iMXI2cLib/iMXI2cLib.c
@@ -0,0 +1,524 @@
+/** @file
+*
+* Copyright (c) Microsoft Corporation. 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 <Uefi.h>
+#include <Base.h>
+#include <Library/BaseLib.h>
+#include <Library/BaseMemoryLib.h>
+#include <Library/IoLib.h>
+#include <Library/TimerLib.h>
+#include <Library/DebugLib.h>
+
+#include <iMXI2cLib.h>
+
+typedef struct {
+ UINT32 Divider;
+ UINT32 IC;
+} IMX_I2C_DIVIDER;
+
+IMX_I2C_DIVIDER DividerValue[] = {
+ { 22, 0x20, },
+ { 24, 0x21, },
+ { 26, 0x22, },
+ { 28, 0x23, },
+ { 30, 0x00, },
+ { 32, 0x24, },
+ { 36, 0x25, },
+ { 40, 0x26, },
+ { 42, 0x03, },
+ { 44, 0x27, },
+ { 48, 0x28, },
+ { 52, 0x05, },
+ { 56, 0x29, },
+ { 60, 0x06, },
+ { 64, 0x2A, },
+ { 72, 0x2B, },
+ { 80, 0x2C, },
+ { 88, 0x09, },
+ { 96, 0x2D, },
+ { 104, 0x0A, },
+ { 112, 0x2E, },
+ { 128, 0x2F, },
+ { 144, 0x0C, },
+ { 160, 0x30, },
+ { 192, 0x31, },
+ { 224, 0x32, },
+ { 240, 0x0F, },
+ { 256, 0x33, },
+ { 288, 0x10, },
+ { 320, 0x34, },
+ { 384, 0x35, },
+ { 448, 0x36, },
+ { 480, 0x13, },
+ { 512, 0x37, },
+ { 576, 0x14, },
+ { 640, 0x38, },
+ { 768, 0x39, },
+ { 896, 0x3A, },
+ { 960, 0x17, },
+ { 1024, 0x3B, },
+ { 1152, 0x18, },
+ { 1280, 0x3C, },
+ { 1536, 0x3D, },
+ { 1792, 0x3E, },
+ { 1920, 0x1B, },
+ { 2048, 0x3F, },
+ { 2304, 0x1C, },
+ { 2560, 0x1D, },
+ { 3072, 0x1E, },
+ { 3840, 0x1F, },
+};
+
+#define DIVIDER_VALUE_TOTAL (sizeof(DividerValue) / sizeof(DividerValue[0]))
+
+BOOLEAN
+iMXI2cWaitStatusSet (
+ IMX_I2C_CONFIG* I2cConfigPtr,
+ UINT16 StatusBits
+ )
+{
+ UINT32 counter = I2cConfigPtr->TimeoutInUs;
+ IMX_I2C_REGS* i2cRegsPtr = (IMX_I2C_REGS*)I2cConfigPtr->ControllerAddress;
+
+ while (counter) {
+ IMX_I2C_I2SR_REG i2srReg = { MmioRead16((UINTN)&i2cRegsPtr->I2SR) };
+
+ if ((i2srReg.AsUint16 & StatusBits) == StatusBits) {
+ return TRUE;
+ }
+
+ MicroSecondDelay(1);
+ --counter;
+ }
+
+ return FALSE;
+}
+
+BOOLEAN
+iMXI2cWaitStatusUnSet (
+ IMX_I2C_CONFIG* I2cConfigPtr,
+ UINT16 StatusBits
+)
+{
+ UINT32 counter = I2cConfigPtr->TimeoutInUs;
+ IMX_I2C_REGS* i2cRegsPtr = (IMX_I2C_REGS*)I2cConfigPtr->ControllerAddress;
+
+ while (counter) {
+ IMX_I2C_I2SR_REG i2srReg = { MmioRead16((UINTN)&i2cRegsPtr->I2SR) };
+
+ if ((i2srReg.AsUint16 & StatusBits) == 0) {
+ return TRUE;
+ }
+
+ MicroSecondDelay(1);
+ --counter;
+ }
+
+ return FALSE;;
+}
+
+BOOLEAN
+iMXI2cSendByte (
+ IMX_I2C_CONFIG* I2cConfigPtr,
+ UINT8 Data
+)
+{
+ UINT16 sendData = Data;
+ UINT32 counter = I2cConfigPtr->TimeoutInUs;
+ IMX_I2C_REGS* i2cRegsPtr = (IMX_I2C_REGS*)I2cConfigPtr->ControllerAddress;
+
+ //
+ // Clear status
+ //
+ MmioWrite16((UINTN)&i2cRegsPtr->I2SR, 0);
+
+ //
+ // Transfer byte
+ //
+ MmioWrite16((UINTN)&i2cRegsPtr->I2DR, sendData);
+
+ while (counter) {
+ IMX_I2C_I2SR_REG i2srReg = { MmioRead16((UINTN)&i2cRegsPtr->I2SR) };
+
+ if (i2srReg.IIF == 1) {
+ return TRUE;
+ }
+ else if (i2srReg.IAL == 1) {
+
+ DEBUG((
+ DEBUG_ERROR,
+ "iMXI2cSendByte: fail 0x%04x\n",
+ i2srReg.AsUint16));
+ return FALSE;
+ }
+
+ MicroSecondDelay(1);
+ --counter;
+ }
+
+ DEBUG((DEBUG_ERROR, "iMXI2cSendByte: Fail timeout\n"));
+
+ return FALSE;
+}
+
+RETURN_STATUS
+iMXI2cSetupController (
+ IMX_I2C_CONFIG* I2cConfigPtr,
+ UINT8 RegisterAddress
+ )
+{
+ IMX_I2C_REGS* i2cRegsPtr = (IMX_I2C_REGS*)I2cConfigPtr->ControllerAddress;
+
+ //
+ // Disable controller and clear any pending interrupt
+ //
+ MmioWrite16((UINTN)&i2cRegsPtr->I2CR, 0);
+ MmioWrite16((UINTN)&i2cRegsPtr->I2SR, 0);
+
+ //
+ // Setup divider if reference freq is provided. If no use value setup by
+ // 1st boot loader
+ //
+ if (I2cConfigPtr->ReferenceFreq != 0) {
+
+ UINT32 ifdrDiv = 0;
+ UINT32 dividerCount;
+ UINT32 divider = I2cConfigPtr->ReferenceFreq / I2cConfigPtr->TargetFreq;
+
+ for (dividerCount = 0;
+ dividerCount < DIVIDER_VALUE_TOTAL;
+ ++dividerCount) {
+
+ if (DividerValue[dividerCount].Divider >= divider) {
+
+ DEBUG((
+ DEBUG_INFO,
+ "iMXI2cSetupController: divider %d IC 0x%02x\n",
+ DividerValue[dividerCount].Divider,
+ DividerValue[dividerCount].IC));
+
+ ifdrDiv = DividerValue[dividerCount].IC;
+ break;
+ }
+ }
+
+ if (ifdrDiv == 0) {
+ DEBUG((
+ DEBUG_ERROR,
+ "iMXI2cSetupController: could not find divider for %d\n",
+ divider));
+ return RETURN_INVALID_PARAMETER;
+ }
+
+ MmioWrite16((UINTN)&i2cRegsPtr->IFDR, ifdrDiv);
+ }
+
+ //
+ // Setup slave address
+ //
+ MmioWrite16((UINTN)&i2cRegsPtr->IADR, (I2cConfigPtr->ControllerSlaveAddress << 1));
+
+ //
+ // Enable controller and set to master mode.
+ //
+ {
+ IMX_I2C_I2CR_REG i2crReg = { MmioRead16((UINTN)&i2cRegsPtr->I2CR) };
+
+ //
+ // This bit must be set before any other I2C_I2CR bits have an effect
+ //
+ i2crReg.IEN = 1;
+ MmioWrite16((UINTN)&i2cRegsPtr->I2CR, i2crReg.AsUint16);
+ MicroSecondDelay(100);
+
+ MmioWrite16((UINTN)&i2cRegsPtr->I2SR, 0);
+
+ //
+ // Wait for bus to be idle
+ //
+ if (iMXI2cWaitStatusUnSet(I2cConfigPtr, IMX_I2C_I2SR_IBB) == FALSE) {
+ DEBUG((DEBUG_ERROR, "iMXI2cGenerateStart: Controller remains busy\n"));
+ return RETURN_DEVICE_ERROR;
+ }
+
+ i2crReg.MSTA = 1;
+ MmioWrite16((UINTN)&i2cRegsPtr->I2CR, i2crReg.AsUint16);
+
+ //
+ // Now wait for bus to be busy
+ //
+ if (iMXI2cWaitStatusSet(I2cConfigPtr, IMX_I2C_I2SR_IBB) == FALSE) {
+ DEBUG((DEBUG_ERROR, "iMXI2cGenerateStart: Controller remains idle\n"));
+ return RETURN_DEVICE_ERROR;
+ }
+ }
+
+ return RETURN_SUCCESS;
+}
+
+RETURN_STATUS
+iMXI2cGenerateStart (
+ IMX_I2C_CONFIG* I2cConfigPtr,
+ UINT8 RegisterAddress,
+ BOOLEAN Read
+ )
+{
+ BOOLEAN result;
+ RETURN_STATUS status;
+ IMX_I2C_REGS* i2cRegsPtr = (IMX_I2C_REGS*)I2cConfigPtr->ControllerAddress;
+
+ status = iMXI2cSetupController(
+ I2cConfigPtr,
+ RegisterAddress);
+ if (RETURN_ERROR(status)) {
+ DEBUG((DEBUG_ERROR, "iMXI2cGenerateStart: Fail to setup controller %r\n", status));
+ return status;
+ }
+
+ //
+ // Send slave address so set controller to transmit mode
+ //
+ {
+ IMX_I2C_I2CR_REG i2crReg = { MmioRead16((UINTN)&i2cRegsPtr->I2CR) };
+
+ i2crReg.MTX = 1;
+ MmioWrite16((UINTN)&i2cRegsPtr->I2CR, i2crReg.AsUint16);
+ }
+
+ result = iMXI2cSendByte(
+ I2cConfigPtr,
+ (I2cConfigPtr->SlaveAddress << 1));
+ if (result == FALSE) {
+ DEBUG((
+ DEBUG_ERROR,
+ "iMXI2cGenerateStart: Slave address transfer fail 0x%04x\n",
+ MmioRead16((UINTN)&i2cRegsPtr->I2SR)));
+ return RETURN_DEVICE_ERROR;
+ }
+
+ //
+ // Send slave register
+ //
+ result = iMXI2cSendByte(
+ I2cConfigPtr,
+ RegisterAddress);
+ if (result == FALSE) {
+ DEBUG((
+ DEBUG_ERROR,
+ "iMXI2cGenerateStart: Slave register address transfer fail 0x%04x\n",
+ MmioRead16((UINTN)&i2cRegsPtr->I2SR)));
+ return RETURN_DEVICE_ERROR;
+ }
+
+ return RETURN_SUCCESS;
+}
+
+RETURN_STATUS
+iMXI2cGenerateStop (
+ IMX_I2C_CONFIG* I2cConfigPtr
+ )
+{
+ IMX_I2C_REGS* i2cRegsPtr = (IMX_I2C_REGS*)I2cConfigPtr->ControllerAddress;
+ IMX_I2C_I2CR_REG i2crReg = { MmioRead16((UINTN)&i2cRegsPtr->I2CR) };
+
+ i2crReg.MSTA = 0;
+ i2crReg.MTX = 0;
+ MmioWrite16((UINTN)&i2cRegsPtr->I2CR, i2crReg.AsUint16);
+
+ //
+ // Bus should go idle
+ //
+ if (iMXI2cWaitStatusUnSet(I2cConfigPtr, IMX_I2C_I2SR_IBB) == FALSE) {
+ DEBUG((DEBUG_ERROR, "iMXI2cGenerateStop: Controller remains busy\n"));
+ return RETURN_DEVICE_ERROR;
+ }
+
+ return RETURN_SUCCESS;
+}
+
+RETURN_STATUS
+iMXI2cRead (
+ IN IMX_I2C_CONFIG* I2cConfigPtr,
+ IN UINT8 RegisterAddress,
+ OUT UINT8* ReadBufferPtr,
+ IN UINT32 ReadBufferSize
+ )
+{
+ RETURN_STATUS status;
+ IMX_I2C_REGS* i2cRegsPtr = (IMX_I2C_REGS*)I2cConfigPtr->ControllerAddress;
+
+ status = iMXI2cGenerateStart(
+ I2cConfigPtr,
+ RegisterAddress,
+ TRUE);
+ if (RETURN_ERROR(status)) {
+ DEBUG((DEBUG_ERROR, "iMXI2cRead: iMXI2cGenerateStart failed %r\n", status));
+ goto Exit;
+ }
+
+ //
+ // Send slave address again to begin read
+ //
+ {
+ BOOLEAN result;
+ IMX_I2C_I2CR_REG i2crReg = { MmioRead16((UINTN)&i2cRegsPtr->I2CR) };
+
+ i2crReg.RSTA = 1; // Repeated start
+ MmioWrite16((UINTN)&i2cRegsPtr->I2CR, i2crReg.AsUint16);
+
+ result = iMXI2cSendByte(
+ I2cConfigPtr,
+ (I2cConfigPtr->SlaveAddress << 1 | 1));
+ if (result == FALSE) {
+ DEBUG((
+ DEBUG_ERROR,
+ "iMXI2cRead: 2nd Slave address transfer failed 0x%04x\n",
+ MmioRead16((UINTN)&i2cRegsPtr->I2SR)));
+ status = RETURN_DEVICE_ERROR;
+ goto Exit;
+ }
+ }
+
+ //
+ // Disable master mode
+ //
+ {
+ IMX_I2C_I2CR_REG i2crReg = { MmioRead16((UINTN)&i2cRegsPtr->I2CR) };
+
+ //
+ // NXP application note AN4481
+ // Only one byte so do not send acknowledge
+ //
+ if (ReadBufferSize == 1) {
+ i2crReg.TXAK = 1;
+ }
+ else {
+ i2crReg.TXAK = 0;
+ }
+
+ i2crReg.MTX = 0;
+ MmioWrite16((UINTN)&i2cRegsPtr->I2CR, i2crReg.AsUint16);
+ }
+
+ //
+ // A data transfer can now be initiated by a read from I2C_I2DR in Slave
+ // Receive mode.
+ //
+ {
+ MmioWrite16((UINTN)&i2cRegsPtr->I2SR, 0);
+ MmioRead16((UINTN)&i2cRegsPtr->I2DR);
+ }
+
+ do {
+ //
+ // Wait for transfer to complete
+ //
+ if (iMXI2cWaitStatusSet(I2cConfigPtr, IMX_I2C_I2SR_IIF) == FALSE) {
+ DEBUG((DEBUG_ERROR, "iMXI2cRead: waiting for read fail\n"));
+ status = RETURN_DEVICE_ERROR;
+ goto Exit;
+ }
+
+ if (iMXI2cWaitStatusSet(I2cConfigPtr, IMX_I2C_I2SR_ICF) == FALSE) {
+ DEBUG((DEBUG_ERROR, "iMXI2cRead: waiting for read fail\n"));
+ status = RETURN_DEVICE_ERROR;
+ goto Exit;
+ }
+
+ //
+ // Per spec. Before the last byte is read, a Stop signal must be generated
+ //
+ if (ReadBufferSize == 1) {
+
+ status = iMXI2cGenerateStop(
+ I2cConfigPtr);
+ if (RETURN_ERROR(status)) {
+ DEBUG((DEBUG_ERROR, "iMXI2cRead: iMXI2cGenerateStop fail %r\n", status));
+ goto Exit;
+ }
+ }
+
+ if (ReadBufferSize == 2) {
+ IMX_I2C_I2CR_REG i2crReg = { MmioRead16((UINTN)&i2cRegsPtr->I2CR) };
+
+ i2crReg.TXAK = 1;
+ MmioWrite16((UINTN)&i2cRegsPtr->I2CR, i2crReg.AsUint16);
+ }
+
+ MmioWrite16((UINTN)&i2cRegsPtr->I2SR, 0);
+
+ *ReadBufferPtr = MmioRead8((UINTN)&i2cRegsPtr->I2DR);
+
+ ++ReadBufferPtr;
+ --ReadBufferSize;
+
+ } while (ReadBufferSize > 0);
+
+Exit:
+ status = iMXI2cGenerateStop(
+ I2cConfigPtr);
+ if (RETURN_ERROR(status)) {
+ DEBUG((DEBUG_ERROR, "iMXI2cRead: Final iMXI2cGenerateStop fail %r\n", status));
+ }
+
+ return status;
+}
+
+RETURN_STATUS
+iMXI2cWrite (
+ IN IMX_I2C_CONFIG* I2cConfigPtr,
+ IN UINT8 RegisterAddress,
+ IN UINT8* WriteBufferPtr,
+ IN UINT32 WriteBufferSize
+ )
+{
+ RETURN_STATUS status;
+ IMX_I2C_REGS* i2cRegsPtr = (IMX_I2C_REGS*)I2cConfigPtr->ControllerAddress;
+
+ status = iMXI2cGenerateStart(
+ I2cConfigPtr,
+ RegisterAddress,
+ FALSE);
+ if (RETURN_ERROR(status)) {
+ DEBUG((DEBUG_ERROR, "iMXI2cWrite: iMXI2cGenerateStart fail %r\n", status));
+ goto Exit;
+ }
+
+ while (WriteBufferSize > 0) {
+
+ BOOLEAN result = iMXI2cSendByte(
+ I2cConfigPtr,
+ *WriteBufferPtr);
+ if (result == FALSE) {
+ DEBUG((
+ DEBUG_ERROR,
+ "iMXI2cWrite: Slave address transfer fail 0x%04x\n",
+ MmioRead16((UINTN)&i2cRegsPtr->I2SR)));
+ status = RETURN_DEVICE_ERROR;
+ goto Exit;
+ }
+
+ ++WriteBufferPtr;
+ --WriteBufferSize;
+ }
+
+Exit:
+ status = iMXI2cGenerateStop(
+ I2cConfigPtr);
+ if (RETURN_ERROR(status)) {
+ DEBUG((DEBUG_ERROR, "iMXI2cWrite: iMXI2cGenerateStop fail %r\n", status));
+ }
+
+ return status;
+}
diff --git a/Silicon/NXP/iMXPlatformPkg/Library/iMXI2cLib/iMXI2cLib.inf b/Silicon/NXP/iMXPlatformPkg/Library/iMXI2cLib/iMXI2cLib.inf
new file mode 100644
index 000000000000..409fc8f14166
--- /dev/null
+++ b/Silicon/NXP/iMXPlatformPkg/Library/iMXI2cLib/iMXI2cLib.inf
@@ -0,0 +1,35 @@
+## @file
+#
+# Copyright (c) Microsoft Corporation. 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.
+#
+##
+
+[Defines]
+ INF_VERSION = 0x00010005
+ BASE_NAME = iMXI2cLib
+ FILE_GUID = C4E4A003-8AEB-4C9B-8E72-D2BAD2134BDE
+ MODULE_TYPE = BASE
+ VERSION_STRING = 1.0
+ LIBRARY_CLASS = iMXI2cLib
+
+[Packages]
+ MdePkg/MdePkg.dec
+ EmbeddedPkg/EmbeddedPkg.dec
+ Silicon/NXP/iMXPlatformPkg/iMXPlatformPkg.dec
+
+[LibraryClasses]
+ DebugLib
+ IoLib
+ TimerLib
+ BaseMemoryLib
+
+[Sources.common]
+ iMXI2cLib.c
--
2.16.2.gvfs.1.33.gf5370f1
next prev parent reply other threads:[~2018-07-19 4:11 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-07-19 4:11 [PATCH edk2-platforms 0/7] Silicon/NXP: Import NXP i.MX platform package Chris Co
2018-07-19 4:11 ` [PATCH edk2-platforms 1/7] Silicon/NXP: Add support for iMX SDHC Chris Co
2018-08-01 16:15 ` Leif Lindholm
2018-08-01 23:59 ` Chris Co
2018-07-19 4:11 ` [PATCH edk2-platforms 2/7] Silicon/NXP: Add iMX display library support Chris Co
2018-07-19 4:11 ` Chris Co [this message]
2018-07-19 4:11 ` [PATCH edk2-platforms 4/7] Silicon/NXP: Add UART library support for iMX platforms Chris Co
2018-07-19 4:11 ` [PATCH edk2-platforms 5/7] Silicon/NXP: Add Virtual RTC support for IMX platform Chris Co
2018-07-19 4:11 ` [PATCH edk2-platforms 6/7] Silicon/NXP: Add iMXPlatformPkg dec Chris Co
2018-07-19 4:11 ` [PATCH edk2-platforms 7/7] Silicon/NXP: Add headers for other iMX packages to use Chris Co
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