diff options
Diffstat (limited to 'Vlv2TbltDevicePkg/Library/SmbusLib/SmbusLib.c')
| -rw-r--r-- | Vlv2TbltDevicePkg/Library/SmbusLib/SmbusLib.c | 873 |
1 files changed, 0 insertions, 873 deletions
diff --git a/Vlv2TbltDevicePkg/Library/SmbusLib/SmbusLib.c b/Vlv2TbltDevicePkg/Library/SmbusLib/SmbusLib.c deleted file mode 100644 index 4052724..0000000 --- a/Vlv2TbltDevicePkg/Library/SmbusLib/SmbusLib.c +++ /dev/null @@ -1,873 +0,0 @@ -/** @file
- Intel ICH9 SMBUS library implementation built upon I/O library.
-
- Copyright (c) 2010 - 2014, Intel Corporation. All rights reserved.<BR>
-
- SPDX-License-Identifier: BSD-2-Clause-Patent
-
-
-
-**/
-
-#include "CommonHeader.h"
-
-/**
- Gets Io port base address of Smbus Host Controller.
-
- This internal function depends on a feature flag named PcdIchSmbusFixedIoPortBaseAddress
- to retrieve Smbus Io port base. If that feature flag is true, it will get Smbus Io port base
- address from a preset Pcd entry named PcdIchSmbusIoPortBaseAddress; otherwise, it will always
- read Pci configuration space to get that value in each Smbus bus transaction.
-
- @return The Io port base address of Smbus host controller.
-
-**/
-UINTN
-InternalGetSmbusIoPortBaseAddress (
- VOID
- )
-{
- UINTN IoPortBaseAddress;
-
- IoPortBaseAddress = (UINTN) MmioRead32 (MmPciAddress (0, DEFAULT_PCI_BUS_NUMBER_PCH, PCI_DEVICE_NUMBER_PCH_SMBUS, PCI_FUNCTION_NUMBER_PCH_SMBUS, R_PCH_SMBUS_BASE)) & B_PCH_SMBUS_BASE_BAR;
-
- //
- // Make sure that the IO port base address has been properly set.
- //
- ASSERT (IoPortBaseAddress != 0);
-
- return IoPortBaseAddress;
-}
-
-/**
- Acquires the ownership of SMBUS.
-
- This internal function reads the host state register.
- If the SMBUS is not available, RETURN_TIMEOUT is returned;
- Otherwise, it performs some basic initializations and returns
- RETURN_SUCCESS.
-
- @param IoPortBaseAddress The Io port base address of Smbus Host controller.
-
- @retval RETURN_SUCCESS The SMBUS command was executed successfully.
- @retval RETURN_TIMEOUT A timeout occurred while executing the SMBUS command.
-
-**/
-RETURN_STATUS
-InternalSmBusAcquire (
- UINTN IoPortBaseAddress
- )
-{
- UINT8 HostStatus;
-
- HostStatus = IoRead8 (IoPortBaseAddress + R_PCH_SMBUS_HSTS);
- if ((HostStatus & B_PCH_SMBUS_IUS) != 0) {
- return RETURN_TIMEOUT;
- } else if ((HostStatus & B_PCH_SMBUS_HBSY) != 0) {
- //
- // Clear host status register and exit.
- //
- IoWrite8 (IoPortBaseAddress + R_PCH_SMBUS_HSTS, B_PCH_SMBUS_HSTS_ALL);
- return RETURN_TIMEOUT;
- }
- //
- // Clear out any odd status information (Will Not Clear In Use).
- //
- IoWrite8 (IoPortBaseAddress + R_PCH_SMBUS_HSTS, HostStatus);
-
- return RETURN_SUCCESS;
-}
-
-/**
- Starts the SMBUS transaction and waits until the end.
-
- This internal function start the SMBUS transaction and waits until the transaction
- of SMBUS is over by polling the INTR bit of Host status register.
- If the SMBUS is not available, RETURN_TIMEOUT is returned;
- Otherwise, it performs some basic initializations and returns
- RETURN_SUCCESS.
-
- @param IoPortBaseAddress The Io port base address of Smbus Host controller.
- @param HostControl The Host control command to start SMBUS transaction.
-
- @retval RETURN_SUCCESS The SMBUS command was executed successfully.
- @retval RETURN_CRC_ERROR The checksum is not correct (PEC is incorrect).
- @retval RETURN_DEVICE_ERROR The request was not completed because a failure reflected
- in the Host Status Register bit. Device errors are
- a result of a transaction collision, illegal command field,
- unclaimed cycle (host initiated), or bus errors (collisions).
-
-**/
-RETURN_STATUS
-InternalSmBusStart (
- IN UINTN IoPortBaseAddress,
- IN UINT8 HostControl
- )
-{
- UINT8 HostStatus;
- UINT8 AuxiliaryStatus;
-
- //
- // Set Host Control Register (Initiate Operation, Interrupt disabled).
- //
- IoWrite8 (IoPortBaseAddress + R_PCH_SMBUS_HCTL, (UINT8)(HostControl + B_PCH_SMBUS_START));
-
- do {
- //
- // Poll INTR bit of Host Status Register.
- //
- HostStatus = IoRead8 (IoPortBaseAddress + R_PCH_SMBUS_HSTS);
- } while ((HostStatus & (B_PCH_SMBUS_INTR | B_PCH_SMBUS_ERRORS | B_PCH_SMBUS_BYTE_DONE_STS)) == 0);
-
- if ((HostStatus & B_PCH_SMBUS_ERRORS) == 0) {
- return RETURN_SUCCESS;
- }
-
- //
- // Clear error bits of Host Status Register.
- //
- IoWrite8 (IoPortBaseAddress + R_PCH_SMBUS_HSTS, B_PCH_SMBUS_ERRORS);
-
- //
- // Read Auxiliary Status Register to judge CRC error.
- //
- AuxiliaryStatus = IoRead8 (IoPortBaseAddress + R_PCH_SMBUS_AUXS);
- if ((AuxiliaryStatus & B_PCH_SMBUS_CRCE) != 0) {
- return RETURN_CRC_ERROR;
- }
-
- return RETURN_DEVICE_ERROR;
-}
-
-/**
- Executes an SMBUS quick, byte or word command.
-
- This internal function executes an SMBUS quick, byte or word commond.
- If Status is not NULL, then the status of the executed command is returned in Status.
-
- @param HostControl The value of Host Control Register to set.
- @param SmBusAddress Address that encodes the SMBUS Slave Address,
- SMBUS Command, SMBUS Data Length, and PEC.
- @param Value The byte/word write to the SMBUS.
- @param Status Return status for the executed command.
- This is an optional parameter and may be NULL.
-
- @return The byte/word read from the SMBUS.
-
-**/
-UINT16
-InternalSmBusNonBlock (
- IN UINT8 HostControl,
- IN UINTN SmBusAddress,
- IN UINT16 Value,
- OUT RETURN_STATUS *Status
- )
-{
- RETURN_STATUS ReturnStatus;
- UINTN IoPortBaseAddress;
- UINT8 AuxiliaryControl;
-
- IoPortBaseAddress = InternalGetSmbusIoPortBaseAddress ();
-
- //
- // Try to acquire the ownership of ICH SMBUS.
- //
- ReturnStatus = InternalSmBusAcquire (IoPortBaseAddress);
- if (RETURN_ERROR (ReturnStatus)) {
- goto Done;
- }
-
- //
- // Set the appropriate Host Control Register and auxiliary Control Register.
- //
- AuxiliaryControl = 0;
- if (SMBUS_LIB_PEC (SmBusAddress)) {
- AuxiliaryControl |= B_PCH_SMBUS_AAC;
- HostControl |= B_PCH_SMBUS_PEC_EN;
- }
-
- //
- // Set Host Command Register.
- //
- IoWrite8 (IoPortBaseAddress + R_PCH_SMBUS_HCMD, (UINT8) SMBUS_LIB_COMMAND (SmBusAddress));
-
- //
- // Write value to Host Data 0 and Host Data 1 Registers.
- //
- IoWrite8 (IoPortBaseAddress + R_PCH_SMBUS_HD0, (UINT8) Value);
- IoWrite8 (IoPortBaseAddress + R_PCH_SMBUS_HD1, (UINT8) (Value >> 8));
-
- //
- // Set Auxiliary Control Register.
- //
- IoWrite8 (IoPortBaseAddress + R_PCH_SMBUS_AUXC, AuxiliaryControl);
-
- //
- // Set SMBUS slave address for the device to send/receive from.
- //
- IoWrite8 (IoPortBaseAddress + R_PCH_SMBUS_TSA, (UINT8) SmBusAddress);
-
- //
- // Start the SMBUS transaction and wait for the end.
- //
- ReturnStatus = InternalSmBusStart (IoPortBaseAddress, HostControl);
-
- //
- // Read value from Host Data 0 and Host Data 1 Registers.
- //
- Value = (UINT16)(IoRead8 (IoPortBaseAddress + R_PCH_SMBUS_HD1) << 8);
- Value = (UINT16)(Value | IoRead8 (IoPortBaseAddress + R_PCH_SMBUS_HD0));
-
- //
- // Clear Host Status Register and Auxiliary Status Register.
- //
- IoWrite8 (IoPortBaseAddress + R_PCH_SMBUS_HSTS, B_PCH_SMBUS_HSTS_ALL);
- IoWrite8 (IoPortBaseAddress + R_PCH_SMBUS_AUXS, B_PCH_SMBUS_CRCE);
-
-Done:
- if (Status != NULL) {
- *Status = ReturnStatus;
- }
-
- return Value;
-}
-
-/**
- Executes an SMBUS quick read command.
-
- Executes an SMBUS quick read command on the SMBUS device specified by SmBusAddress.
- Only the SMBUS slave address field of SmBusAddress is required.
- If Status is not NULL, then the status of the executed command is returned in Status.
- If PEC is set in SmBusAddress, then ASSERT().
- If Command in SmBusAddress is not zero, then ASSERT().
- If Length in SmBusAddress is not zero, then ASSERT().
- If any reserved bits of SmBusAddress are set, then ASSERT().
-
- @param SmBusAddress Address that encodes the SMBUS Slave Address,
- SMBUS Command, SMBUS Data Length, and PEC.
- @param Status Return status for the executed command.
- This is an optional parameter and may be NULL.
-
-**/
-VOID
-EFIAPI
-SmBusQuickRead (
- IN UINTN SmBusAddress,
- OUT RETURN_STATUS *Status OPTIONAL
- )
-{
- ASSERT (!SMBUS_LIB_PEC (SmBusAddress));
- ASSERT (SMBUS_LIB_COMMAND (SmBusAddress) == 0);
- ASSERT (SMBUS_LIB_LENGTH (SmBusAddress) == 0);
- ASSERT (SMBUS_LIB_RESERVED (SmBusAddress) == 0);
-
- InternalSmBusNonBlock (
- V_PCH_SMBUS_SMB_CMD_QUICK,
- SmBusAddress | B_PCH_SMBUS_RW_SEL_READ,
- 0,
- Status
- );
-}
-
-/**
- Executes an SMBUS quick write command.
-
- Executes an SMBUS quick write command on the SMBUS device specified by SmBusAddress.
- Only the SMBUS slave address field of SmBusAddress is required.
- If Status is not NULL, then the status of the executed command is returned in Status.
- If PEC is set in SmBusAddress, then ASSERT().
- If Command in SmBusAddress is not zero, then ASSERT().
- If Length in SmBusAddress is not zero, then ASSERT().
- If any reserved bits of SmBusAddress are set, then ASSERT().
-
- @param SmBusAddress Address that encodes the SMBUS Slave Address,
- SMBUS Command, SMBUS Data Length, and PEC.
- @param Status Return status for the executed command.
- This is an optional parameter and may be NULL.
-
-**/
-VOID
-EFIAPI
-SmBusQuickWrite (
- IN UINTN SmBusAddress,
- OUT RETURN_STATUS *Status OPTIONAL
- )
-{
- ASSERT (!SMBUS_LIB_PEC (SmBusAddress));
- ASSERT (SMBUS_LIB_COMMAND (SmBusAddress) == 0);
- ASSERT (SMBUS_LIB_LENGTH (SmBusAddress) == 0);
- ASSERT (SMBUS_LIB_RESERVED (SmBusAddress) == 0);
-
- InternalSmBusNonBlock (
- V_PCH_SMBUS_SMB_CMD_QUICK,
- SmBusAddress | B_PCH_SMBUS_RW_SEL_WRITE,
- 0,
- Status
- );
-}
-
-/**
- Executes an SMBUS receive byte command.
-
- Executes an SMBUS receive byte command on the SMBUS device specified by SmBusAddress.
- Only the SMBUS slave address field of SmBusAddress is required.
- The byte received from the SMBUS is returned.
- If Status is not NULL, then the status of the executed command is returned in Status.
- If Command in SmBusAddress is not zero, then ASSERT().
- If Length in SmBusAddress is not zero, then ASSERT().
- If any reserved bits of SmBusAddress are set, then ASSERT().
-
- @param SmBusAddress Address that encodes the SMBUS Slave Address,
- SMBUS Command, SMBUS Data Length, and PEC.
- @param Status Return status for the executed command.
- This is an optional parameter and may be NULL.
-
- @return The byte received from the SMBUS.
-
-**/
-UINT8
-EFIAPI
-SmBusReceiveByte (
- IN UINTN SmBusAddress,
- OUT RETURN_STATUS *Status OPTIONAL
- )
-{
- UINT8 ValueReturn = 0;
-
- ASSERT (SMBUS_LIB_COMMAND (SmBusAddress) == 0);
- ASSERT (SMBUS_LIB_LENGTH (SmBusAddress) == 0);
- ASSERT (SMBUS_LIB_RESERVED (SmBusAddress) == 0);
-
- ValueReturn = (UINT8) InternalSmBusNonBlock (
- V_PCH_SMBUS_SMB_CMD_BYTE,
- SmBusAddress | B_PCH_SMBUS_RW_SEL_READ,
- 0,
- Status
- );
- return ValueReturn;
-
- }
-
-/**
- Executes an SMBUS send byte command.
-
- Executes an SMBUS send byte command on the SMBUS device specified by SmBusAddress.
- The byte specified by Value is sent.
- Only the SMBUS slave address field of SmBusAddress is required. Value is returned.
- If Status is not NULL, then the status of the executed command is returned in Status.
- If Command in SmBusAddress is not zero, then ASSERT().
- If Length in SmBusAddress is not zero, then ASSERT().
- If any reserved bits of SmBusAddress are set, then ASSERT().
-
- @param SmBusAddress Address that encodes the SMBUS Slave Address,
- SMBUS Command, SMBUS Data Length, and PEC.
- @param Value The 8-bit value to send.
- @param Status Return status for the executed command.
- This is an optional parameter and may be NULL.
-
- @return The parameter of Value.
-
-**/
-UINT8
-EFIAPI
-SmBusSendByte (
- IN UINTN SmBusAddress,
- IN UINT8 Value,
- OUT RETURN_STATUS *Status OPTIONAL
- )
-{
- UINT8 ValueReturn = 0;
-
- ASSERT (SMBUS_LIB_COMMAND (SmBusAddress) == 0);
- ASSERT (SMBUS_LIB_LENGTH (SmBusAddress) == 0);
- ASSERT (SMBUS_LIB_RESERVED (SmBusAddress) == 0);
-
- ValueReturn = (UINT8) InternalSmBusNonBlock (
- V_PCH_SMBUS_SMB_CMD_BYTE,
- SmBusAddress | B_PCH_SMBUS_RW_SEL_WRITE,
- Value,
- Status
- );
- return ValueReturn;
-
- }
-
-/**
- Executes an SMBUS read data byte command.
-
- Executes an SMBUS read data byte command on the SMBUS device specified by SmBusAddress.
- Only the SMBUS slave address and SMBUS command fields of SmBusAddress are required.
- The 8-bit value read from the SMBUS is returned.
- If Status is not NULL, then the status of the executed command is returned in Status.
- If Length in SmBusAddress is not zero, then ASSERT().
- If any reserved bits of SmBusAddress are set, then ASSERT().
-
- @param SmBusAddress Address that encodes the SMBUS Slave Address,
- SMBUS Command, SMBUS Data Length, and PEC.
- @param Status Return status for the executed command.
- This is an optional parameter and may be NULL.
-
- @return The byte read from the SMBUS.
-
-**/
-UINT8
-EFIAPI
-SmBusReadDataByte (
- IN UINTN SmBusAddress,
- OUT RETURN_STATUS *Status OPTIONAL
- )
-{
- UINT8 ValueReturn = 0;
-
- ASSERT (SMBUS_LIB_LENGTH (SmBusAddress) == 0);
- ASSERT (SMBUS_LIB_RESERVED (SmBusAddress) == 0);
- ValueReturn = (UINT8) InternalSmBusNonBlock (
- V_PCH_SMBUS_SMB_CMD_BYTE_DATA,
- SmBusAddress | B_PCH_SMBUS_RW_SEL_READ,
- 0,
- Status
- );
- return ValueReturn;
-}
-
-/**
- Executes an SMBUS write data byte command.
-
- Executes an SMBUS write data byte command on the SMBUS device specified by SmBusAddress.
- The 8-bit value specified by Value is written.
- Only the SMBUS slave address and SMBUS command fields of SmBusAddress are required.
- Value is returned.
- If Status is not NULL, then the status of the executed command is returned in Status.
- If Length in SmBusAddress is not zero, then ASSERT().
- If any reserved bits of SmBusAddress are set, then ASSERT().
-
- @param SmBusAddress Address that encodes the SMBUS Slave Address,
- SMBUS Command, SMBUS Data Length, and PEC.
- @param Value The 8-bit value to write.
- @param Status Return status for the executed command.
- This is an optional parameter and may be NULL.
-
- @return The parameter of Value.
-
-**/
-UINT8
-EFIAPI
-SmBusWriteDataByte (
- IN UINTN SmBusAddress,
- IN UINT8 Value,
- OUT RETURN_STATUS *Status OPTIONAL
- )
-{
- UINT8 ValueReturn = 0;
-
- ASSERT (SMBUS_LIB_LENGTH (SmBusAddress) == 0);
- ASSERT (SMBUS_LIB_RESERVED (SmBusAddress) == 0);
-
- ValueReturn = (UINT8) InternalSmBusNonBlock (
- V_PCH_SMBUS_SMB_CMD_BYTE_DATA,
- SmBusAddress | B_PCH_SMBUS_RW_SEL_WRITE,
- Value,
- Status
- );
- return ValueReturn;
-
-}
-
-/**
- Executes an SMBUS read data word command.
-
- Executes an SMBUS read data word command on the SMBUS device specified by SmBusAddress.
- Only the SMBUS slave address and SMBUS command fields of SmBusAddress are required.
- The 16-bit value read from the SMBUS is returned.
- If Status is not NULL, then the status of the executed command is returned in Status.
- If Length in SmBusAddress is not zero, then ASSERT().
- If any reserved bits of SmBusAddress are set, then ASSERT().
-
- @param SmBusAddress Address that encodes the SMBUS Slave Address,
- SMBUS Command, SMBUS Data Length, and PEC.
- @param Status Return status for the executed command.
- This is an optional parameter and may be NULL.
-
- @return The byte read from the SMBUS.
-
-**/
-UINT16
-EFIAPI
-SmBusReadDataWord (
- IN UINTN SmBusAddress,
- OUT RETURN_STATUS *Status OPTIONAL
- )
-{
- UINT16 ValueReturn = 0;
- ASSERT (SMBUS_LIB_LENGTH (SmBusAddress) == 0);
- ASSERT (SMBUS_LIB_RESERVED (SmBusAddress) == 0);
-
- ValueReturn = InternalSmBusNonBlock (
- V_PCH_SMBUS_SMB_CMD_WORD_DATA,
- SmBusAddress | B_PCH_SMBUS_RW_SEL_READ,
- 0,
- Status
- );
- return ValueReturn;
-
-}
-
-/**
- Executes an SMBUS write data word command.
-
- Executes an SMBUS write data word command on the SMBUS device specified by SmBusAddress.
- The 16-bit value specified by Value is written.
- Only the SMBUS slave address and SMBUS command fields of SmBusAddress are required.
- Value is returned.
- If Status is not NULL, then the status of the executed command is returned in Status.
- If Length in SmBusAddress is not zero, then ASSERT().
- If any reserved bits of SmBusAddress are set, then ASSERT().
-
- @param SmBusAddress Address that encodes the SMBUS Slave Address,
- SMBUS Command, SMBUS Data Length, and PEC.
- @param Value The 16-bit value to write.
- @param Status Return status for the executed command.
- This is an optional parameter and may be NULL.
-
- @return The parameter of Value.
-
-**/
-UINT16
-EFIAPI
-SmBusWriteDataWord (
- IN UINTN SmBusAddress,
- IN UINT16 Value,
- OUT RETURN_STATUS *Status OPTIONAL
- )
-{
- UINT16 ValueReturn = 0;
- ASSERT (SMBUS_LIB_LENGTH (SmBusAddress) == 0);
- ASSERT (SMBUS_LIB_RESERVED (SmBusAddress) == 0);
-
- ValueReturn = InternalSmBusNonBlock (
- V_PCH_SMBUS_SMB_CMD_WORD_DATA,
- SmBusAddress | B_PCH_SMBUS_RW_SEL_WRITE,
- Value,
- Status
- );
- return ValueReturn;
-}
-
-/**
- Executes an SMBUS process call command.
-
- Executes an SMBUS process call command on the SMBUS device specified by SmBusAddress.
- The 16-bit value specified by Value is written.
- Only the SMBUS slave address and SMBUS command fields of SmBusAddress are required.
- The 16-bit value returned by the process call command is returned.
- If Status is not NULL, then the status of the executed command is returned in Status.
- If Length in SmBusAddress is not zero, then ASSERT().
- If any reserved bits of SmBusAddress are set, then ASSERT().
-
- @param SmBusAddress Address that encodes the SMBUS Slave Address,
- SMBUS Command, SMBUS Data Length, and PEC.
- @param Value The 16-bit value to write.
- @param Status Return status for the executed command.
- This is an optional parameter and may be NULL.
-
- @return The 16-bit value returned by the process call command.
-
-**/
-UINT16
-EFIAPI
-SmBusProcessCall (
- IN UINTN SmBusAddress,
- IN UINT16 Value,
- OUT RETURN_STATUS *Status OPTIONAL
- )
-{
- UINT16 ValueReturn = 0;
- ASSERT (SMBUS_LIB_LENGTH (SmBusAddress) == 0);
- ASSERT (SMBUS_LIB_RESERVED (SmBusAddress) == 0);
-
- ValueReturn = InternalSmBusNonBlock (
- V_PCH_SMBUS_SMB_CMD_PROCESS_CALL,
- SmBusAddress | B_PCH_SMBUS_RW_SEL_WRITE,
- Value,
- Status
- );
- return ValueReturn;
-}
-
-/**
- Executes an SMBUS block command.
-
- Executes an SMBUS block read, block write and block write-block read command
- on the SMBUS device specified by SmBusAddress.
- Bytes are read from the SMBUS and stored in Buffer.
- The number of bytes read is returned, and will never return a value larger than 32-bytes.
- If Status is not NULL, then the status of the executed command is returned in Status.
- It is the caller's responsibility to make sure Buffer is large enough for the total number of bytes read.
- SMBUS supports a maximum transfer size of 32 bytes, so Buffer does not need to be any larger than 32 bytes.
-
- @param HostControl The value of Host Control Register to set.
- @param SmBusAddress Address that encodes the SMBUS Slave Address,
- SMBUS Command, SMBUS Data Length, and PEC.
- @param WriteBuffer Pointer to the buffer of bytes to write to the SMBUS.
- @param ReadBuffer Pointer to the buffer of bytes to read from the SMBUS.
- @param Status Return status for the executed command.
- This is an optional parameter and may be NULL.
-
- @return The number of bytes read from the SMBUS.
-
-**/
-UINTN
-InternalSmBusBlock (
- IN UINT8 HostControl,
- IN UINTN SmBusAddress,
- IN UINT8 *WriteBuffer,
- OUT UINT8 *ReadBuffer,
- OUT RETURN_STATUS *Status
- )
-{
- RETURN_STATUS ReturnStatus;
- UINTN Index;
- UINTN BytesCount;
- UINTN IoPortBaseAddress;
- UINT8 AuxiliaryControl;
-
- IoPortBaseAddress = InternalGetSmbusIoPortBaseAddress ();
-
- BytesCount = SMBUS_LIB_LENGTH (SmBusAddress);
-
- //
- // Try to acquire the ownership of ICH SMBUS.
- //
- ReturnStatus = InternalSmBusAcquire (IoPortBaseAddress);
- if (RETURN_ERROR (ReturnStatus)) {
- goto Done;
- }
-
- //
- // Set the appropriate Host Control Register and auxiliary Control Register.
- //
- AuxiliaryControl = B_PCH_SMBUS_E32B;
- if (SMBUS_LIB_PEC (SmBusAddress)) {
- AuxiliaryControl |= B_PCH_SMBUS_AAC;
- HostControl |= B_PCH_SMBUS_PEC_EN;
- }
-
- //
- // Set Host Command Register.
- //
- IoWrite8 (IoPortBaseAddress + R_PCH_SMBUS_HCMD, (UINT8) SMBUS_LIB_COMMAND (SmBusAddress));
-
- //
- // Set Auxiliary Control Regiester.
- //
- IoWrite8 (IoPortBaseAddress + R_PCH_SMBUS_AUXC, AuxiliaryControl);
-
- //
- // Clear byte pointer of 32-byte buffer.
- //
- IoRead8 (IoPortBaseAddress + R_PCH_SMBUS_HCTL);
-
- if (WriteBuffer != NULL) {
- //
- // Write the number of block to Host Block Data Byte Register.
- //
- IoWrite8 (IoPortBaseAddress + R_PCH_SMBUS_HD0, (UINT8) BytesCount);
-
- //
- // Write data block to Host Block Data Register.
- //
- for (Index = 0; Index < BytesCount; Index++) {
- IoWrite8 (IoPortBaseAddress + R_PCH_SMBUS_HBD, WriteBuffer[Index]);
- }
- }
-
- //
- // Set SMBUS slave address for the device to send/receive from.
- //
- IoWrite8 (IoPortBaseAddress + R_PCH_SMBUS_TSA, (UINT8) SmBusAddress);
-
- //
- // Start the SMBUS transaction and wait for the end.
- //
- ReturnStatus = InternalSmBusStart (IoPortBaseAddress, HostControl);
- if (RETURN_ERROR (ReturnStatus)) {
- goto Done;
- }
-
- if (ReadBuffer != NULL) {
- //
- // Read the number of block from host block data byte register.
- //
- BytesCount = IoRead8 (IoPortBaseAddress + R_PCH_SMBUS_HD0);
-
- //
- // Write data block from Host Block Data Register.
- //
- for (Index = 0; Index < BytesCount; Index++) {
- ReadBuffer[Index] = IoRead8 (IoPortBaseAddress + R_PCH_SMBUS_HBD);
- }
- }
-
-Done:
- //
- // Clear Host Status Register and Auxiliary Status Register.
- //
- IoWrite8 (IoPortBaseAddress + R_PCH_SMBUS_HSTS, B_PCH_SMBUS_HSTS_ALL);
- IoWrite8 (IoPortBaseAddress + R_PCH_SMBUS_AUXS, B_PCH_SMBUS_CRCE);
-
- if (Status != NULL) {
- *Status = ReturnStatus;
- }
-
- return BytesCount;
-}
-
-/**
- Executes an SMBUS read block command.
-
- Executes an SMBUS read block command on the SMBUS device specified by SmBusAddress.
- Only the SMBUS slave address and SMBUS command fields of SmBusAddress are required.
- Bytes are read from the SMBUS and stored in Buffer.
- The number of bytes read is returned, and will never return a value larger than 32-bytes.
- If Status is not NULL, then the status of the executed command is returned in Status.
- It is the caller's responsibility to make sure Buffer is large enough for the total number of bytes read.
- SMBUS supports a maximum transfer size of 32 bytes, so Buffer does not need to be any larger than 32 bytes.
- If Length in SmBusAddress is not zero, then ASSERT().
- If Buffer is NULL, then ASSERT().
- If any reserved bits of SmBusAddress are set, then ASSERT().
-
- @param SmBusAddress Address that encodes the SMBUS Slave Address,
- SMBUS Command, SMBUS Data Length, and PEC.
- @param Buffer Pointer to the buffer to store the bytes read from the SMBUS.
- @param Status Return status for the executed command.
- This is an optional parameter and may be NULL.
-
- @return The number of bytes read.
-
-**/
-UINTN
-EFIAPI
-SmBusReadBlock (
- IN UINTN SmBusAddress,
- OUT VOID *Buffer,
- OUT RETURN_STATUS *Status OPTIONAL
- )
-{
- UINTN BytesCount = 0;
-
- ASSERT (Buffer != NULL);
- ASSERT (SMBUS_LIB_LENGTH (SmBusAddress) == 0);
- ASSERT (SMBUS_LIB_RESERVED (SmBusAddress) == 0);
-
-
- BytesCount = InternalSmBusBlock (
- V_PCH_SMBUS_SMB_CMD_BLOCK,
- SmBusAddress | B_PCH_SMBUS_RW_SEL_READ,
- NULL,
- Buffer,
- Status
- );
- return BytesCount;
-
-}
-
-/**
- Executes an SMBUS write block command.
-
- Executes an SMBUS write block command on the SMBUS device specified by SmBusAddress.
- The SMBUS slave address, SMBUS command, and SMBUS length fields of SmBusAddress are required.
- Bytes are written to the SMBUS from Buffer.
- The number of bytes written is returned, and will never return a value larger than 32-bytes.
- If Status is not NULL, then the status of the executed command is returned in Status.
- If Length in SmBusAddress is zero or greater than 32, then ASSERT().
- If Buffer is NULL, then ASSERT().
- If any reserved bits of SmBusAddress are set, then ASSERT().
-
- @param SmBusAddress Address that encodes the SMBUS Slave Address,
- SMBUS Command, SMBUS Data Length, and PEC.
- @param Buffer Pointer to the buffer to store the bytes read from the SMBUS.
- @param Status Return status for the executed command.
- This is an optional parameter and may be NULL.
-
- @return The number of bytes written.
-
-**/
-UINTN
-EFIAPI
-SmBusWriteBlock (
- IN UINTN SmBusAddress,
- OUT VOID *Buffer,
- OUT RETURN_STATUS *Status OPTIONAL
- )
-{
- UINTN BytesCount = 0;
-
- ASSERT (Buffer != NULL);
- ASSERT (SMBUS_LIB_LENGTH (SmBusAddress) >= 1);
- ASSERT (SMBUS_LIB_LENGTH (SmBusAddress) <= 32);
- ASSERT (SMBUS_LIB_RESERVED (SmBusAddress) == 0);
-
-
- BytesCount = InternalSmBusBlock (
-
- V_PCH_SMBUS_SMB_CMD_BLOCK,
- SmBusAddress | B_PCH_SMBUS_RW_SEL_WRITE,
- Buffer,
- NULL,
- Status
- );
-
- return BytesCount;
-}
-
-/**
- Executes an SMBUS block process call command.
-
- Executes an SMBUS block process call command on the SMBUS device specified by SmBusAddress.
- The SMBUS slave address, SMBUS command, and SMBUS length fields of SmBusAddress are required.
- Bytes are written to the SMBUS from WriteBuffer. Bytes are then read from the SMBUS into ReadBuffer.
- If Status is not NULL, then the status of the executed command is returned in Status.
- It is the caller's responsibility to make sure ReadBuffer is large enough for the total number of bytes read.
- SMBUS supports a maximum transfer size of 32 bytes, so Buffer does not need to be any larger than 32 bytes.
- If Length in SmBusAddress is zero or greater than 32, then ASSERT().
- If WriteBuffer is NULL, then ASSERT().
- If ReadBuffer is NULL, then ASSERT().
- If any reserved bits of SmBusAddress are set, then ASSERT().
-
- @param SmBusAddress Address that encodes the SMBUS Slave Address,
- SMBUS Command, SMBUS Data Length, and PEC.
- @param WriteBuffer Pointer to the buffer of bytes to write to the SMBUS.
- @param ReadBuffer Pointer to the buffer of bytes to read from the SMBUS.
- @param Status Return status for the executed command.
- This is an optional parameter and may be NULL.
-
- @return The number of bytes written.
-
-**/
-UINTN
-EFIAPI
-SmBusBlockProcessCall (
- IN UINTN SmBusAddress,
- IN VOID *WriteBuffer,
- OUT VOID *ReadBuffer,
- OUT RETURN_STATUS *Status OPTIONAL
- )
-{
- UINTN BytesCount = 0;
-
- ASSERT (WriteBuffer != NULL);
- ASSERT (ReadBuffer != NULL);
- ASSERT (SMBUS_LIB_LENGTH (SmBusAddress) >= 1);
- ASSERT (SMBUS_LIB_LENGTH (SmBusAddress) <= 32);
- ASSERT (SMBUS_LIB_RESERVED (SmBusAddress) == 0);
-
- BytesCount = InternalSmBusBlock (
- V_PCH_SMBUS_SMB_CMD_BLOCK_PROCESS,
- SmBusAddress | B_PCH_SMBUS_RW_SEL_WRITE,
- WriteBuffer,
- ReadBuffer,
- Status
- );
- return BytesCount;
-
- }
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