diff options
Diffstat (limited to 'MdePkg/Library/BaseSmbusLib/SmbusLib.c')
-rw-r--r-- | MdePkg/Library/BaseSmbusLib/SmbusLib.c | 833 |
1 files changed, 0 insertions, 833 deletions
diff --git a/MdePkg/Library/BaseSmbusLib/SmbusLib.c b/MdePkg/Library/BaseSmbusLib/SmbusLib.c deleted file mode 100644 index 16ae2fa..0000000 --- a/MdePkg/Library/BaseSmbusLib/SmbusLib.c +++ /dev/null @@ -1,833 +0,0 @@ -/** @file
- Base SMBUS library implementation built upon I/O library.
-
- Copyright (c) 2006, Intel Corporation<BR>
- 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.
-
- Module Name: SmbusLib.c
-
-**/
-
-#include "SmbusLibRegisters.h"
-
-#define SMBUS_LIB_SLAVE_ADDRESS(SmBusAddress) (((SmBusAddress) >> 1) & 0x7f)
-#define SMBUS_LIB_COMMAND(SmBusAddress) (((SmBusAddress) >> 8) & 0xff)
-#define SMBUS_LIB_LENGTH(SmBusAddress) (((SmBusAddress) >> 16) & 0x3f)
-#define SMBUS_LIB_PEC(SmBusAddress) ((BOOLEAN) (((SmBusAddress) & SMBUS_LIB_PEC_BIT) != 0))
-#define SMBUS_LIB_RESEARVED(SmBusAddress) ((SmBusAddress) & ~(((1 << 22) - 2) | SMBUS_LIB_PEC_BIT))
-
-//
-// Replaced by PCD
-//
-#define ICH_SMBUS_IO_BASE_ADDRESS 0xEFA0
-
-/**
- Reads an 8-bit register on ICH SMBUS controller.
-
- This internal function reads an SMBUS register specified by Offset.
-
- @param Offset The offset of SMBUS register.
-
- @return The value read.
-
-**/
-UINT8
-InternalSmBusIoRead8 (
- IN UINTN Offset
- )
-{
- return IoRead8 (ICH_SMBUS_IO_BASE_ADDRESS + Offset);
-}
-
-/**
- Writes an 8-bit register on ICH SMBUS controller.
-
- This internal function writes an SMBUS register specified by Offset.
-
- @param Offset The offset of SMBUS register.
- @param Value The value to write to SMBUS register.
-
- @return The value written the SMBUS register.
-
-**/
-UINT8
-InternalSmBusIoWrite8 (
- IN UINTN Offset,
- IN UINT8 Value
- )
-{
- return IoWrite8 (ICH_SMBUS_IO_BASE_ADDRESS + Offset, Value);
-}
-
-/**
- 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.
-
- @retval RETURN_SUCCESS The SMBUS command was executed successfully.
- @retval RETURN_TIMEOUT A timeout occurred while executing the SMBUS command.
-
-**/
-RETURN_STATUS
-InternalSmBusAcquire (
- VOID
- )
-{
- UINT8 HostStatus;
-
- HostStatus = InternalSmBusIoRead8 (SMBUS_R_HST_STS);
- if ((HostStatus & SMBUS_B_INUSE_STS) != 0) {
- return RETURN_TIMEOUT;
- } else if ((HostStatus & SMBUS_B_HOST_BUSY) != 0) {
- //
- // Clear host status register and exit.
- //
- InternalSmBusIoWrite8 (SMBUS_R_HST_STS, SMBUS_B_HSTS_ALL);
- return RETURN_TIMEOUT;
- }
- //
- // Clear out any odd status information (Will Not Clear In Use).
- //
- InternalSmBusIoWrite8 (SMBUS_R_HST_STS, 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 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 UINT8 HostControl
- )
-{
- UINT8 HostStatus;
- UINT8 AuxiliaryStatus;
-
- //
- // Set Host Control Register (Initiate Operation, Interrupt disabled).
- //
- InternalSmBusIoWrite8 (SMBUS_R_HST_CTL, HostControl + SMBUS_B_START);
-
- do {
- //
- // Poll INTR bit of Host Status Register.
- //
- HostStatus = InternalSmBusIoRead8 (SMBUS_R_HST_STS);
- } while ((HostStatus & (SMBUS_B_INTR | SMBUS_B_ERROR | SMBUS_B_BYTE_DONE_STS)) == 0);
-
- if ((HostStatus & SMBUS_B_ERROR) == 0) {
- return RETURN_SUCCESS;
- }
- //
- // Clear error bits of Host Status Register.
- //
- InternalSmBusIoWrite8 (SMBUS_R_HST_STS, SMBUS_B_ERROR);
- //
- // Read Auxiliary Status Register to judge CRC error.
- //
- AuxiliaryStatus = InternalSmBusIoRead8 (SMBUS_R_AUX_STS);
- if ((AuxiliaryStatus & SMBUS_B_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;
- UINT8 AuxiliaryControl;
-
- //
- // Try to acquire the ownership of ICH SMBUS.
- //
- ReturnStatus = InternalSmBusAcquire ();
- if (RETURN_ERROR (ReturnStatus)) {
- goto Done;
- }
- //
- // Set the appropriate Host Control Register and auxiliary Control Register.
- //
- AuxiliaryControl = 0;
- if (SMBUS_LIB_PEC (SmBusAddress)) {
- AuxiliaryControl |= SMBUS_B_AAC;
- HostControl |= SMBUS_B_PEC_EN;
- }
- //
- // Set Host Commond Register.
- //
- InternalSmBusIoWrite8 (SMBUS_R_HST_CMD, (UINT8) SMBUS_LIB_COMMAND (SmBusAddress));
- //
- // Write value to Host Data 0 and Host Data 1 Registers.
- //
- InternalSmBusIoWrite8 (SMBUS_R_HST_D0, (UINT8) Value);
- InternalSmBusIoWrite8 (SMBUS_R_HST_D1, (UINT8) (Value >> 8));
- //
- // Set Auxiliary Control Regiester.
- //
- InternalSmBusIoWrite8 (SMBUS_R_AUX_CTL, AuxiliaryControl);
- //
- // Set SMBUS slave address for the device to send/receive from.
- //
- InternalSmBusIoWrite8 (SMBUS_R_XMIT_SLVA, (UINT8) SmBusAddress);
- //
- // Start the SMBUS transaction and wait for the end.
- //
- ReturnStatus = InternalSmBusStart (HostControl);
- //
- // Read value from Host Data 0 and Host Data 1 Registers.
- //
- Value = InternalSmBusIoRead8 (SMBUS_R_HST_D1) << 8;
- Value |= InternalSmBusIoRead8 (SMBUS_R_HST_D0);
- //
- // Clear Host Status Register and Auxiliary Status Register.
- //
- InternalSmBusIoWrite8 (SMBUS_R_HST_STS, SMBUS_B_HSTS_ALL);
- InternalSmBusIoWrite8 (SMBUS_R_AUX_STS, SMBUS_B_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_RESEARVED (SmBusAddress) == 0);
-
- InternalSmBusNonBlock (
- SMBUS_V_SMB_CMD_QUICK,
- SmBusAddress | SMBUS_B_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_RESEARVED (SmBusAddress) == 0);
-
- InternalSmBusNonBlock (
- SMBUS_V_SMB_CMD_QUICK,
- SmBusAddress | SMBUS_B_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
- )
-{
- ASSERT (SMBUS_LIB_COMMAND (SmBusAddress) == 0);
- ASSERT (SMBUS_LIB_LENGTH (SmBusAddress) == 0);
- ASSERT (SMBUS_LIB_RESEARVED (SmBusAddress) == 0);
-
- return (UINT8) InternalSmBusNonBlock (
- SMBUS_V_SMB_CMD_BYTE,
- SmBusAddress | SMBUS_B_READ,
- 0,
- Status
- );
-}
-
-/**
- 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
- )
-{
- ASSERT (SMBUS_LIB_COMMAND (SmBusAddress) == 0);
- ASSERT (SMBUS_LIB_LENGTH (SmBusAddress) == 0);
- ASSERT (SMBUS_LIB_RESEARVED (SmBusAddress) == 0);
-
- return (UINT8) InternalSmBusNonBlock (
- SMBUS_V_SMB_CMD_BYTE,
- SmBusAddress | SMBUS_B_WRITE,
- Value,
- Status
- );
-}
-
-/**
- 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
- )
-{
- ASSERT (SMBUS_LIB_LENGTH (SmBusAddress) == 0);
- ASSERT (SMBUS_LIB_RESEARVED (SmBusAddress) == 0);
-
- return (UINT8) InternalSmBusNonBlock (
- SMBUS_V_SMB_CMD_BYTE_DATA,
- SmBusAddress | SMBUS_B_READ,
- 0,
- Status
- );
-}
-
-/**
- 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
- )
-{
- ASSERT (SMBUS_LIB_LENGTH (SmBusAddress) == 0);
- ASSERT (SMBUS_LIB_RESEARVED (SmBusAddress) == 0);
-
- return (UINT8) InternalSmBusNonBlock (
- SMBUS_V_SMB_CMD_BYTE_DATA,
- SmBusAddress | SMBUS_B_WRITE,
- Value,
- Status
- );
-}
-
-/**
- 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
- )
-{
- ASSERT (SMBUS_LIB_LENGTH (SmBusAddress) == 0);
- ASSERT (SMBUS_LIB_RESEARVED (SmBusAddress) == 0);
-
- return InternalSmBusNonBlock (
- SMBUS_V_SMB_CMD_WORD_DATA,
- SmBusAddress | SMBUS_B_READ,
- 0,
- Status
- );
-}
-
-/**
- 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
- )
-{
- ASSERT (SMBUS_LIB_LENGTH (SmBusAddress) == 0);
- ASSERT (SMBUS_LIB_RESEARVED (SmBusAddress) == 0);
-
- return InternalSmBusNonBlock (
- SMBUS_V_SMB_CMD_WORD_DATA,
- SmBusAddress | SMBUS_B_WRITE,
- Value,
- Status
- );
-}
-
-/**
- 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
- )
-{
- ASSERT (SMBUS_LIB_LENGTH (SmBusAddress) == 0);
- ASSERT (SMBUS_LIB_RESEARVED (SmBusAddress) == 0);
-
- return InternalSmBusNonBlock (
- SMBUS_V_SMB_CMD_PROCESS_CALL,
- SmBusAddress | SMBUS_B_WRITE,
- Value,
- Status
- );
-}
-
-/**
- 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;
- UINT8 AuxiliaryControl;
-
- BytesCount = SMBUS_LIB_LENGTH (SmBusAddress);
- //
- // Try to acquire the ownership of ICH SMBUS.
- //
- ReturnStatus = InternalSmBusAcquire ();
- if (RETURN_ERROR (ReturnStatus)) {
- goto Done;
- }
- //
- // Set the appropriate Host Control Register and auxiliary Control Register.
- //
- AuxiliaryControl = SMBUS_B_E32B;
- if (SMBUS_LIB_PEC (SmBusAddress)) {
- AuxiliaryControl |= SMBUS_B_AAC;
- HostControl |= SMBUS_B_PEC_EN;
- }
- //
- // Set Host Command Register.
- //
- InternalSmBusIoWrite8 (SMBUS_R_HST_CMD, (UINT8) SMBUS_LIB_COMMAND (SmBusAddress));
- //
- // Set Auxiliary Control Regiester.
- //
- InternalSmBusIoWrite8 (SMBUS_R_AUX_CTL, AuxiliaryControl);
- //
- // Clear byte pointer of 32-byte buffer.
- //
- InternalSmBusIoRead8 (SMBUS_R_HST_CTL);
-
- if (WriteBuffer != NULL) {
- //
- // Write the number of block to Host Block Data Byte Register.
- //
- InternalSmBusIoWrite8 (SMBUS_R_HST_D0, (UINT8) BytesCount);
- //
- // Write data block to Host Block Data Register.
- //
- for (Index = 0; Index < BytesCount; Index++) {
- InternalSmBusIoWrite8 (SMBUS_R_HOST_BLOCK_DB, WriteBuffer[Index]);
- }
- }
- //
- // Set SMBUS slave address for the device to send/receive from.
- //
- InternalSmBusIoWrite8 (SMBUS_R_XMIT_SLVA, (UINT8) SmBusAddress);
- //
- // Start the SMBUS transaction and wait for the end.
- //
- ReturnStatus = InternalSmBusStart (HostControl);
- if (RETURN_ERROR (ReturnStatus)) {
- goto Done;
- }
-
- if (ReadBuffer != NULL) {
- //
- // Read the number of block from host block data byte register.
- //
- BytesCount = InternalSmBusIoRead8 (SMBUS_R_HST_D0);
- //
- // Write data block from Host Block Data Register.
- //
- for (Index = 0; Index < BytesCount; Index++) {
- ReadBuffer[Index] = InternalSmBusIoRead8 (SMBUS_R_HOST_BLOCK_DB);
- }
- }
- //
- // Clear Host Status Register and Auxiliary Status Register.
- //
- InternalSmBusIoWrite8 (SMBUS_R_HST_STS, SMBUS_B_HSTS_ALL);
- InternalSmBusIoWrite8 (SMBUS_R_AUX_STS, SMBUS_B_CRCE);
-
-Done:
- 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
- )
-{
- ASSERT (Buffer != NULL);
- ASSERT (SMBUS_LIB_LENGTH (SmBusAddress) == 0);
- ASSERT (SMBUS_LIB_RESEARVED (SmBusAddress) == 0);
-
- return InternalSmBusBlock (
- SMBUS_V_SMB_CMD_BLOCK,
- SmBusAddress | SMBUS_B_READ,
- NULL,
- Buffer,
- Status
- );
-}
-
-/**
- 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
- )
-{
- ASSERT (Buffer != NULL);
- ASSERT (SMBUS_LIB_LENGTH (SmBusAddress) >= 1);
- ASSERT (SMBUS_LIB_LENGTH (SmBusAddress) <= 32);
- ASSERT (SMBUS_LIB_RESEARVED (SmBusAddress) == 0);
-
- return InternalSmBusBlock (
- SMBUS_V_SMB_CMD_BLOCK,
- SmBusAddress | SMBUS_B_WRITE,
- Buffer,
- NULL,
- Status
- );
-}
-
-/**
- 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
- )
-{
- ASSERT (WriteBuffer != NULL);
- ASSERT (ReadBuffer != NULL);
- ASSERT (SMBUS_LIB_LENGTH (SmBusAddress) >= 1);
- ASSERT (SMBUS_LIB_LENGTH (SmBusAddress) <= 32);
- ASSERT (SMBUS_LIB_RESEARVED (SmBusAddress) == 0);
-
- return InternalSmBusBlock (
- SMBUS_V_SMB_CMD_BLOCK_PROCESS,
- SmBusAddress | SMBUS_B_WRITE,
- WriteBuffer,
- ReadBuffer,
- Status
- );
-}
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