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alder_lake_bios/Intel/AlderLake/ClientOneSiliconPkg/IpBlock/Smbus/Dxe/SmbusArp.c

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/** @file
Smbus DXE driver
@copyright
INTEL CONFIDENTIAL
Copyright 2004 - 2021 Intel Corporation.
The source code contained or described herein and all documents related to the
source code ("Material") are owned by Intel Corporation or its suppliers or
licensors. Title to the Material remains with Intel Corporation or its suppliers
and licensors. The Material may contain trade secrets and proprietary and
confidential information of Intel Corporation and its suppliers and licensors,
and is protected by worldwide copyright and trade secret laws and treaty
provisions. No part of the Material may be used, copied, reproduced, modified,
published, uploaded, posted, transmitted, distributed, or disclosed in any way
without Intel's prior express written permission.
No license under any patent, copyright, trade secret or other intellectual
property right is granted to or conferred upon you by disclosure or delivery
of the Materials, either expressly, by implication, inducement, estoppel or
otherwise. Any license under such intellectual property rights must be
express and approved by Intel in writing.
Unless otherwise agreed by Intel in writing, you may not remove or alter
this notice or any other notice embedded in Materials by Intel or
Intel's suppliers or licensors in any way.
This file contains an 'Intel Peripheral Driver' and is uniquely identified as
"Intel Reference Module" and is licensed for Intel CPUs and chipsets under
the terms of your license agreement with Intel or your vendor. This file may
be modified by the user, subject to additional terms of the license agreement.
@par Specification Reference:
**/
#include "SmbusDxe.h"
///
/// These addresses are reserved by the SMBus 2.0 specification
///
static UINT8 mReservedAddress[SMBUS_NUM_RESERVED] = {
0x00,
0x02,
0x04,
0x06,
0x08,
0x0A,
0x0C,
0x0E,
0x10,
0x18,
0x50,
0x6E,
0xC2,
0xF0,
0xF2,
0xF4,
0xF6,
0xF8,
0xFA,
0xFC,
0xFE,
0x12,
0x14,
0x16,
0x58,
0x5A,
0x80,
0x82,
0x84,
0x86,
0x88,
0x90,
0x92,
0x94,
0x96,
0x1A,
0x1C,
0x1E
};
/**
Set device address for an Smbus device with a known UDID or perform a general
ARP of all devices.
@param[in] This Pointer to the instance of the EFI_SMBUS_HC_PROTOCOL.
@param[in] ArpAll If TRUE, do a full ARP. Otherwise, just ARP the specified UDID.
@param[in] SmbusUdid When doing a directed ARP, ARP the device with this UDID.
@@param[in, out] DeviceAddress Buffer to store new SMBus Device Address during directed ARP. On output,If
ArpAlll == TRUE, this will contain the newly assigned Device address.
@retval EFI_INVALID_PARAMETER ArpAll == FALSE but SmbusUdid or DeviceAddress are NULL.
Return value from SmbusFullArp() or SmbusDirectedArp().
**/
EFI_STATUS
EFIAPI
SmbusArpDevice (
IN CONST EFI_SMBUS_HC_PROTOCOL *This,
IN BOOLEAN ArpAll,
IN EFI_SMBUS_UDID * SmbusUdid, OPTIONAL
IN OUT EFI_SMBUS_DEVICE_ADDRESS * DeviceAddress OPTIONAL
)
{
DEBUG ((DEBUG_INFO, "SmbusArpDevice() Start\n"));
InitializeSmbusRegisters ();
DEBUG ((DEBUG_INFO, "SmbusArpDevice() End\n"));
if (ArpAll) {
return SmbusFullArp (mSmbusContext);
} else {
if ((SmbusUdid == NULL) || (DeviceAddress == NULL)) {
return EFI_INVALID_PARAMETER;
}
return SmbusDirectedArp (mSmbusContext, SmbusUdid, DeviceAddress);
}
}
/**
Get a pointer to the assigned mappings of UDID's to Device Addresses.
@param[in] This Pointer to the instance of the EFI_SMBUS_HC_PROTOCOL.
@param[in, out] Length Buffer to contain the lenght of the Device Map, it will be updated to
contain the number of pairs of UDID's mapped to Device Addresses.
@param[in, out] SmbusDeviceMap Buffer to contian a pointer to the Device Map, it will be updated to
point to the first pair in the Device Map
@retval EFI_SUCCESS Function completed successfully.
**/
EFI_STATUS
EFIAPI
SmbusGetArpMap (
IN CONST EFI_SMBUS_HC_PROTOCOL *This,
IN OUT UINTN *Length,
IN OUT EFI_SMBUS_DEVICE_MAP **SmbusDeviceMap
)
{
*Length = mSmbusContext->DeviceMapEntries * sizeof (EFI_SMBUS_DEVICE_MAP);
*SmbusDeviceMap = mSmbusContext->DeviceMap;
return EFI_SUCCESS;
}
/**
Register a callback in the event of a Host Notify command being sent by a
specified Device on bus.
@param[in] This Pointer to the instance of the EFI_SMBUS_HC_PROTOCOL.
@param[in] DeviceAddress Address of the device whose Host Notify command we want to
trap.
@param[in] Data Data of the Host Notify command we want to trap.
@param[in] NotifyFunction Function to be called in the event the desired Host Notify
command occurs.
@exception EFI_UNSUPPORTED Unable to create the event needed for notifications.
@retval EFI_INVALID_PARAMETER NotifyFunction was NULL.
@retval EFI_OUT_OF_RESOURCES Unable to allocate space to register the notification.
@retval EFI_SUCCESS Function completed successfully
**/
EFI_STATUS
EFIAPI
SmbusNotify (
IN CONST EFI_SMBUS_HC_PROTOCOL *This,
IN EFI_SMBUS_DEVICE_ADDRESS DeviceAddress,
IN UINTN Data,
IN EFI_SMBUS_NOTIFY_FUNCTION NotifyFunction
)
{
EFI_STATUS Status;
SMBUS_NOTIFY_FUNCTION_LIST_NODE *NewNode;
DEBUG ((DEBUG_INFO, "SmbusNotify() Start\n"));
if (NotifyFunction == NULL) {
return EFI_INVALID_PARAMETER;
}
NewNode = (SMBUS_NOTIFY_FUNCTION_LIST_NODE *) AllocatePool (sizeof (SMBUS_NOTIFY_FUNCTION_LIST_NODE));
if (NewNode == NULL) {
DEBUG ((DEBUG_ERROR, "Failed to allocate memory for NewNode! \n"));
return EFI_OUT_OF_RESOURCES;
}
///
/// If this is the first notification request, start an event to periodically
/// check for a Notify Smbus Host Controller command.
///
if (!mSmbusContext->NotificationEvent) {
Status = InitializePeriodicEvent ();
if (EFI_ERROR (Status)) {
FreePool (NewNode);
return EFI_UNSUPPORTED;
}
}
NewNode->Signature = PCH_SMBUS_PRIVATE_DATA_SIGNATURE;
NewNode->DeviceAddress.SmbusDeviceAddress = DeviceAddress.SmbusDeviceAddress;
NewNode->Data = Data;
NewNode->NotifyFunction = NotifyFunction;
InsertTailList (&mSmbusContext->NotifyFunctionList, &NewNode->Link);
DEBUG ((DEBUG_INFO, "SmbusNotify() End\n"));
return EFI_SUCCESS;
}
/**
Set up a periodic event so that we can check if any Smbus Device has sent a
Notify ARP Smbus Host Controller command.
@retval EFI_SUCCESS Periodic event successfully set up.
@retval Other Errors Failed to set up Periodic event.
Error value from CreateEvent().
**/
EFI_STATUS
InitializePeriodicEvent (
VOID
)
{
EFI_STATUS Status;
Status = gBS->CreateEvent (
(EVT_TIMER | EVT_NOTIFY_SIGNAL),
TPL_CALLBACK,
PollSmbusNotify,
NULL,
&mSmbusContext->NotificationEvent
);
if (EFI_ERROR (Status)) {
return Status;
}
Status = gBS->SetTimer (
mSmbusContext->NotificationEvent,
TimerPeriodic,
1000 * MILLISECOND
);
if (EFI_ERROR (Status)) {
return Status;
}
return EFI_SUCCESS;
}
/**
Function to be called every time periodic event happens. This will check if
the SMBus Host Controller has received a Host Notify command. If so, it will
see if a notification has been reqested on that event and make any callbacks
that may be necessary.
@param[in] Event The periodic event that occured and got us into this callback.
@param[in] Context Event context. Will be NULL in this case, since we already have our
private data in a module global variable.
**/
VOID
EFIAPI
PollSmbusNotify (
IN EFI_EVENT Event,
IN VOID *Context
)
{
LIST_ENTRY *Link;
EFI_SMBUS_DEVICE_ADDRESS DeviceAddress;
SMBUS_NOTIFY_FUNCTION_LIST_NODE *Node;
UINT8 SstsReg;
UINTN Data;
DEBUG ((DEBUG_INFO, "PollSmbusNotify() Start\n"));
InitializeSmbusRegisters ();
SstsReg = SmbusIoRead (R_SMBUS_IO_SSTS);
if (!(SstsReg & B_SMBUS_IO_HOST_NOTIFY_STS)) {
///
/// Host Notify has not been received
///
return;
}
///
/// There was a Host Notify, see if any one wants to know about it
///
DeviceAddress.SmbusDeviceAddress = (SmbusIoRead (R_SMBUS_IO_NDA)) >> 1;
Link = GetFirstNode (&mSmbusContext->NotifyFunctionList);
while (!IsNull (&mSmbusContext->NotifyFunctionList, Link)) {
Node = SMBUS_NOTIFY_FUNCTION_LIST_NODE_FROM_LINK (Link);
if (Node->DeviceAddress.SmbusDeviceAddress == DeviceAddress.SmbusDeviceAddress) {
Data = (SmbusIoRead (R_SMBUS_IO_NDHB) << 8) + (SmbusIoRead (R_SMBUS_IO_NDLB));
if ((UINT16) Node->Data == (UINT16) Data) {
///
/// We have a match, notify the requested function
///
Node->NotifyFunction (DeviceAddress, Data);
}
}
Link = GetNextNode (&mSmbusContext->NotifyFunctionList, &Node->Link);
}
///
/// Clear the Notify Status bit and exit.
///
SmbusIoWrite (R_SMBUS_IO_SSTS, B_SMBUS_IO_HOST_NOTIFY_STS);
DEBUG ((DEBUG_INFO, "PollSmbusNotify() End\n"));
return;
}
/**
Issue a prepare ARP command to informs all devices that the ARP Smbus Host Controller is starting the ARP process
@param[in] Private Pointer to the SMBUS_INSTANCE
@retval EFI_SUCCESS The SMBUS operation is successful
@retval Other Values Something error occurred
**/
EFI_STATUS
SmbusPrepareToArp (
IN SMBUS_INSTANCE *Private
)
{
EFI_SMBUS_DEVICE_ADDRESS DeviceAddress;
EFI_STATUS Status;
UINTN Length;
UINT8 Buffer;
DEBUG ((DEBUG_INFO, "SmbusPrepareToArp() Start\n"));
DeviceAddress.SmbusDeviceAddress = SMBUS_ADDRESS_ARP;
Length = 1;
Buffer = SMBUS_DATA_PREPARE_TO_ARP;
Status = SmbusExec (
DeviceAddress,
0,
EfiSmbusSendByte,
TRUE,
&Length,
&Buffer
);
DEBUG ((DEBUG_INFO, "SmbusPrepareToArp() End\n"));
return Status;
}
/**
Issue a Get UDID (general) command to requests ARP-capable and/or Discoverable devices to
return their device address along with their UDID.
@param[in] Private Pointer to the SMBUS_INSTANCE
@param[in, out] DeviceMap Pointer to SMBUS device map table that smbus device return
@retval EFI_SUCCESS The SMBUS operation is successful
@retval Other Values Something error occurred
**/
STATIC
EFI_STATUS
SmbusGetUdidGeneral (
IN SMBUS_INSTANCE *Private,
IN OUT EFI_SMBUS_DEVICE_MAP *DeviceMap
)
{
EFI_SMBUS_DEVICE_ADDRESS DeviceAddress;
EFI_STATUS Status;
UINTN Length;
UINT8 Buffer[SMBUS_GET_UDID_LENGTH];
DEBUG ((DEBUG_INFO, "SmbusGetUdidGeneral() Start\n"));
DeviceAddress.SmbusDeviceAddress = SMBUS_ADDRESS_ARP;
Length = SMBUS_GET_UDID_LENGTH;
Status = SmbusExec (
DeviceAddress,
SMBUS_DATA_GET_UDID_GENERAL,
EfiSmbusReadBlock,
TRUE,
&Length,
Buffer
);
if (!EFI_ERROR (Status)) {
if (Length == SMBUS_GET_UDID_LENGTH) {
DeviceMap->SmbusDeviceUdid.DeviceCapabilities = Buffer[0];
DeviceMap->SmbusDeviceUdid.VendorRevision = Buffer[1];
DeviceMap->SmbusDeviceUdid.VendorId = (UINT16) ((Buffer[2] << 8) + Buffer[3]);
DeviceMap->SmbusDeviceUdid.DeviceId = (UINT16) ((Buffer[4] << 8) + Buffer[5]);
DeviceMap->SmbusDeviceUdid.Interface = (UINT16) ((Buffer[6] << 8) + Buffer[7]);
DeviceMap->SmbusDeviceUdid.SubsystemVendorId = (UINT16) ((Buffer[8] << 8) + Buffer[9]);
DeviceMap->SmbusDeviceUdid.SubsystemDeviceId = (UINT16) ((Buffer[10] << 8) + Buffer[11]);
DeviceMap->SmbusDeviceUdid.VendorSpecificId = (UINT32) ((Buffer[12] << 24) + (Buffer[13] << 16) + (Buffer[14] << 8) + Buffer[15]);
DeviceMap->SmbusDeviceAddress.SmbusDeviceAddress = (UINT8) (Buffer[16] >> 1);
} else {
Status = EFI_DEVICE_ERROR;
}
}
DEBUG ((DEBUG_INFO, "SmbusGetUdidGeneral() End\n"));
return Status;
}
/**
Issue a Assign address command to assigns an address to a specific smbus device.
@param[in] Private Pointer to the SMBUS_INSTANCE
@param[in, out] DeviceMap Pointer to SMBUS device map table that send to smbus device
@retval EFI_SUCCESS The SMBUS operation is successful
@retval Other Values Something error occurred
**/
STATIC
EFI_STATUS
SmbusAssignAddress (
IN SMBUS_INSTANCE *Private,
IN OUT EFI_SMBUS_DEVICE_MAP *DeviceMap
)
{
EFI_SMBUS_DEVICE_ADDRESS DeviceAddress;
EFI_STATUS Status;
UINTN Length;
UINT8 Buffer[SMBUS_GET_UDID_LENGTH];
DEBUG ((DEBUG_INFO, "SmbusAssignAddress() Start\n"));
Buffer[0] = DeviceMap->SmbusDeviceUdid.DeviceCapabilities;
Buffer[1] = DeviceMap->SmbusDeviceUdid.VendorRevision;
Buffer[2] = (UINT8) (DeviceMap->SmbusDeviceUdid.VendorId >> 8);
Buffer[3] = (UINT8) (DeviceMap->SmbusDeviceUdid.VendorId);
Buffer[4] = (UINT8) (DeviceMap->SmbusDeviceUdid.DeviceId >> 8);
Buffer[5] = (UINT8) (DeviceMap->SmbusDeviceUdid.DeviceId);
Buffer[6] = (UINT8) (DeviceMap->SmbusDeviceUdid.Interface >> 8);
Buffer[7] = (UINT8) (DeviceMap->SmbusDeviceUdid.Interface);
Buffer[8] = (UINT8) (DeviceMap->SmbusDeviceUdid.SubsystemVendorId >> 8);
Buffer[9] = (UINT8) (DeviceMap->SmbusDeviceUdid.SubsystemVendorId);
Buffer[10] = (UINT8) (DeviceMap->SmbusDeviceUdid.SubsystemDeviceId >> 8);
Buffer[11] = (UINT8) (DeviceMap->SmbusDeviceUdid.SubsystemDeviceId);
Buffer[12] = (UINT8) (DeviceMap->SmbusDeviceUdid.VendorSpecificId >> 24);
Buffer[13] = (UINT8) (DeviceMap->SmbusDeviceUdid.VendorSpecificId >> 16);
Buffer[14] = (UINT8) (DeviceMap->SmbusDeviceUdid.VendorSpecificId >> 8);
Buffer[15] = (UINT8) (DeviceMap->SmbusDeviceUdid.VendorSpecificId);
Buffer[16] = (UINT8) (DeviceMap->SmbusDeviceAddress.SmbusDeviceAddress << 1);
DeviceAddress.SmbusDeviceAddress = SMBUS_ADDRESS_ARP;
Length = SMBUS_GET_UDID_LENGTH;
Status = SmbusExec (
DeviceAddress,
SMBUS_DATA_ASSIGN_ADDRESS,
EfiSmbusWriteBlock,
TRUE,
&Length,
Buffer
);
DEBUG ((DEBUG_INFO, "SmbusAssignAddress() End\n"));
return Status;
}
/**
Do a fully (general) Arp procress to assign the smbus device address of all ARP-capable device.
This function will issue issue the "Prepare to ARP", "Get UDID" and "Assign Address" commands.
@param[in] Private Pointer to the SMBUS_INSTANCE
@retval EFI_OUT_OF_RESOURCES No available address to assign
@retval EFI_SUCCESS The function completed successfully
**/
EFI_STATUS
SmbusFullArp (
IN SMBUS_INSTANCE *Private
)
{
EFI_STATUS Status;
EFI_SMBUS_DEVICE_MAP *CurrentDeviceMap;
DEBUG ((DEBUG_INFO, "SmbusFullArp() Start\n"));
Status = SmbusPrepareToArp (Private);
if (EFI_ERROR (Status)) {
if (Status == EFI_DEVICE_ERROR) {
///
/// ARP is complete
///
return EFI_SUCCESS;
} else {
return Status;
}
}
///
/// Main loop to ARP all ARP-capable devices
///
do {
CurrentDeviceMap = &Private->DeviceMap[Private->DeviceMapEntries];
Status = SmbusGetUdidGeneral (Private, CurrentDeviceMap);
if (EFI_ERROR (Status)) {
break;
}
if (CurrentDeviceMap->SmbusDeviceAddress.SmbusDeviceAddress == (0xFF >> 1)) {
///
/// If address is unassigned, assign it
///
Status = GetNextAvailableAddress (
Private,
&CurrentDeviceMap->SmbusDeviceAddress
);
if (EFI_ERROR (Status)) {
return EFI_OUT_OF_RESOURCES;
}
} else if (((CurrentDeviceMap->SmbusDeviceUdid.DeviceCapabilities) & 0xC0) != 0) {
///
/// if address is not fixed, check if the current address is available
///
if (!IsAddressAvailable (
Private,
CurrentDeviceMap->SmbusDeviceAddress
)) {
///
/// if currently assigned address is already used, get a new one
///
Status = GetNextAvailableAddress (
Private,
&CurrentDeviceMap->SmbusDeviceAddress
);
if (EFI_ERROR (Status)) {
return EFI_OUT_OF_RESOURCES;
}
}
}
Status = SmbusAssignAddress (Private, CurrentDeviceMap);
if (EFI_ERROR (Status)) {
///
/// If there was a device error, just continue on and try again.
/// Other errors should be reported.
///
if (Status != EFI_DEVICE_ERROR) {
return Status;
}
} else {
///
/// If there was no error, the address was assigned and we must update our
/// records.
///
Private->DeviceMapEntries++;
}
} while (Private->DeviceMapEntries < MAX_SMBUS_DEVICES);
DEBUG ((DEBUG_INFO, "SmbusFullArp() End\n"));
return EFI_SUCCESS;
}
/**
Do a directed Arp procress to assign the SMBus device address of a single ARP-capable device.
@param[in] Private Pointer to the SMBUS_INSTANCE
@param[in] SmbusUdid When doing a directed ARP, ARP the device with this UDID.
@param[in, out] DeviceAddress Buffer to store new SMBus Device Address during directed ARP.
@retval EFI_OUT_OF_RESOURCES DeviceMapEntries is more than Max number of SMBus devices
Or there is no available address to assign
@retval EFI_SUCCESS The function completed successfully
**/
EFI_STATUS
SmbusDirectedArp (
IN SMBUS_INSTANCE *Private,
IN EFI_SMBUS_UDID *SmbusUdid,
IN OUT EFI_SMBUS_DEVICE_ADDRESS *DeviceAddress
)
{
EFI_STATUS Status;
EFI_SMBUS_DEVICE_MAP *CurrentDeviceMap;
DEBUG ((DEBUG_INFO, "SmbusDirectedArp() Start\n"));
if (Private->DeviceMapEntries >= MAX_SMBUS_DEVICES) {
return EFI_OUT_OF_RESOURCES;
}
CurrentDeviceMap = &Private->DeviceMap[Private->DeviceMapEntries];
///
/// Find an available address to assign
///
Status = GetNextAvailableAddress (
Private,
&CurrentDeviceMap->SmbusDeviceAddress
);
if (EFI_ERROR (Status)) {
return EFI_OUT_OF_RESOURCES;
}
CurrentDeviceMap->SmbusDeviceUdid.DeviceCapabilities = SmbusUdid->DeviceCapabilities;
CurrentDeviceMap->SmbusDeviceUdid.DeviceId = SmbusUdid->DeviceId;
CurrentDeviceMap->SmbusDeviceUdid.Interface = SmbusUdid->Interface;
CurrentDeviceMap->SmbusDeviceUdid.SubsystemDeviceId = SmbusUdid->SubsystemDeviceId;
CurrentDeviceMap->SmbusDeviceUdid.SubsystemVendorId = SmbusUdid->SubsystemVendorId;
CurrentDeviceMap->SmbusDeviceUdid.VendorId = SmbusUdid->VendorId;
CurrentDeviceMap->SmbusDeviceUdid.VendorRevision = SmbusUdid->VendorRevision;
CurrentDeviceMap->SmbusDeviceUdid.VendorSpecificId = SmbusUdid->VendorSpecificId;
Status = SmbusAssignAddress (Private, CurrentDeviceMap);
if (EFI_ERROR (Status)) {
return Status;
}
Private->DeviceMapEntries++;
DeviceAddress->SmbusDeviceAddress = CurrentDeviceMap->SmbusDeviceAddress.SmbusDeviceAddress;
DEBUG ((DEBUG_INFO, "SmbusDirectedArp() End\n"));
return EFI_SUCCESS;
}
/**
Find an available address to assign
@param[in] Private Pointer to the SMBUS_INSTANCE
@param[in] DeviceAddress Buffer to store new SMBus Device Address during directed ARP.
@retval EFI_OUT_OF_RESOURCES There is no available address to assign
@retval EFI_SUCCESS The function completed successfully
**/
EFI_STATUS
GetNextAvailableAddress (
IN SMBUS_INSTANCE *Private,
IN EFI_SMBUS_DEVICE_ADDRESS *DeviceAddress
)
{
for (DeviceAddress->SmbusDeviceAddress = 0x03;
DeviceAddress->SmbusDeviceAddress < 0x7F;
DeviceAddress->SmbusDeviceAddress++
) {
if (IsAddressAvailable (Private, *DeviceAddress)) {
return EFI_SUCCESS;
}
}
return EFI_OUT_OF_RESOURCES;
}
/**
Check whether the address is assignable.
@param[in] Private Pointer to the SMBUS_INSTANCE
@param[in] DeviceAddress The SMBus Device Address for checking
@retval TRUE The address is assignable
@retval FALSE The address is not assignable
**/
BOOLEAN
IsAddressAvailable (
IN SMBUS_INSTANCE *Private,
IN EFI_SMBUS_DEVICE_ADDRESS DeviceAddress
)
{
UINT8 Index;
///
/// See if we have already assigned this address to a device
///
for (Index = 0; Index < Private->DeviceMapEntries; Index++) {
if (DeviceAddress.SmbusDeviceAddress == Private->DeviceMap[Index].SmbusDeviceAddress.SmbusDeviceAddress) {
return FALSE;
}
}
///
/// See if this address is claimed by a platform non-ARP-capable device
///
for (Index = 0; Index < Private->PlatformNumRsvd; Index++) {
if ((DeviceAddress.SmbusDeviceAddress << 1) == Private->PlatformRsvdAddr[Index]) {
return FALSE;
}
}
///
/// See if this is a reserved address
///
for (Index = 0; Index < SMBUS_NUM_RESERVED; Index++) {
if ((DeviceAddress.SmbusDeviceAddress << 1) == (UINTN) mReservedAddress[Index]) {
return FALSE;
}
}
return TRUE;
}
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