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audk/MdeModulePkg/Universal/DriverSampleDxe/DriverSample.c

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/** @file
This is an example of how a driver might export data to the HII protocol to be
later utilized by the Setup Protocol
Copyright (c) 2004 - 2008, Intel 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 "DriverSample.h"
#define DISPLAY_ONLY_MY_ITEM 0x0002
EFI_GUID mFormSetGuid = FORMSET_GUID;
EFI_GUID mInventoryGuid = INVENTORY_GUID;
CHAR16 VariableName[] = L"MyIfrNVData";
/**
Encode the password using a simple algorithm.
@param Password The string to be encoded.
@param MaxSize The size of the string.
**/
VOID
EncodePassword (
IN CHAR16 *Password,
IN UINT8 MaxSize
)
{
UINTN Index;
UINTN Loop;
CHAR16 *Buffer;
CHAR16 *Key;
Key = L"MAR10648567";
Buffer = AllocateZeroPool (MaxSize);
ASSERT (Buffer != NULL);
for (Index = 0; Key[Index] != 0; Index++) {
for (Loop = 0; Loop < (UINT8) (MaxSize / 2); Loop++) {
Buffer[Loop] = (CHAR16) (Password[Loop] ^ Key[Index]);
}
}
CopyMem (Password, Buffer, MaxSize);
FreePool (Buffer);
return ;
}
/**
Validate the user's password.
@param PrivateData This driver's private context data.
@param StringId The user's input.
@retval EFI_SUCCESS The user's input matches the password.
@retval EFI_NOT_READY The user's input does not match the password.
**/
EFI_STATUS
ValidatePassword (
IN DRIVER_SAMPLE_PRIVATE_DATA *PrivateData,
IN EFI_STRING_ID StringId
)
{
EFI_STATUS Status;
UINTN Index;
UINTN BufferSize;
CHAR16 *Password;
CHAR16 *EncodedPassword;
BOOLEAN OldPassword;
//
// Get encoded password first
//
BufferSize = sizeof (DRIVER_SAMPLE_CONFIGURATION);
Status = gRT->GetVariable (
VariableName,
&mFormSetGuid,
NULL,
&BufferSize,
&PrivateData->Configuration
);
if (EFI_ERROR (Status)) {
//
// Old password not exist, prompt for new password
//
return EFI_SUCCESS;
}
OldPassword = FALSE;
//
// Check whether we have any old password set
//
for (Index = 0; Index < 20; Index++) {
if (PrivateData->Configuration.WhatIsThePassword2[Index] != 0) {
OldPassword = TRUE;
break;
}
}
if (!OldPassword) {
//
// Old password not exist, return EFI_SUCCESS to prompt for new password
//
return EFI_SUCCESS;
}
//
// Get user input password
//
BufferSize = 21 * sizeof (CHAR16);
Password = AllocateZeroPool (BufferSize);
ASSERT (Password != NULL);
Status = HiiLibGetString (PrivateData->HiiHandle[0], StringId, Password, &BufferSize);
if (EFI_ERROR (Status)) {
FreePool (Password);
return Status;
}
//
// Validate old password
//
EncodedPassword = AllocateCopyPool (21 * sizeof (CHAR16), Password);
ASSERT (EncodedPassword != NULL);
EncodePassword (EncodedPassword, 20 * sizeof (CHAR16));
if (CompareMem (EncodedPassword, PrivateData->Configuration.WhatIsThePassword2, 20 * sizeof (CHAR16)) != 0) {
//
// Old password mismatch, return EFI_NOT_READY to prompt for error message
//
Status = EFI_NOT_READY;
} else {
Status = EFI_SUCCESS;
}
FreePool (Password);
FreePool (EncodedPassword);
return Status;
}
/**
Encode the password using a simple algorithm.
@param PrivateData This driver's private context data.
@param StringId The password from User.
@retval EFI_SUCESS The operation is successful.
@return Other value if gRT->SetVariable () fails.
**/
EFI_STATUS
SetPassword (
IN DRIVER_SAMPLE_PRIVATE_DATA *PrivateData,
IN EFI_STRING_ID StringId
)
{
EFI_STATUS Status;
UINTN BufferSize;
CHAR16 *Password;
DRIVER_SAMPLE_CONFIGURATION *Configuration;
//
// Get Buffer Storage data from EFI variable
//
BufferSize = sizeof (DRIVER_SAMPLE_CONFIGURATION);
Status = gRT->GetVariable (
VariableName,
&mFormSetGuid,
NULL,
&BufferSize,
&PrivateData->Configuration
);
if (EFI_ERROR (Status)) {
return Status;
}
//
// Get user input password
//
Password = &PrivateData->Configuration.WhatIsThePassword2[0];
ZeroMem (Password, 20 * sizeof (CHAR16));
Status = HiiLibGetString (PrivateData->HiiHandle[0], StringId, Password, &BufferSize);
if (EFI_ERROR (Status)) {
return Status;
}
//
// Retrive uncommitted data from Browser
//
BufferSize = sizeof (DRIVER_SAMPLE_CONFIGURATION);
Configuration = AllocateZeroPool (sizeof (DRIVER_SAMPLE_PRIVATE_DATA));
ASSERT (Configuration != NULL);
Status = GetBrowserData (&mFormSetGuid, VariableName, &BufferSize, (UINT8 *) Configuration);
if (!EFI_ERROR (Status)) {
//
// Update password's clear text in the screen
//
CopyMem (Configuration->PasswordClearText, Password, 20 * sizeof (CHAR16));
//
// Update uncommitted data of Browser
//
BufferSize = sizeof (DRIVER_SAMPLE_CONFIGURATION);
Status = SetBrowserData (
&mFormSetGuid,
VariableName,
BufferSize,
(UINT8 *) Configuration,
NULL
);
}
FreePool (Configuration);
//
// Set password
//
EncodePassword (Password, 20 * sizeof (CHAR16));
Status = gRT->SetVariable(
VariableName,
&mFormSetGuid,
EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS,
sizeof (DRIVER_SAMPLE_CONFIGURATION),
&PrivateData->Configuration
);
return Status;
}
/**
This function allows a caller to extract the current configuration for one
or more named elements from the target driver.
@param This Points to the EFI_HII_CONFIG_ACCESS_PROTOCOL.
@param Request A null-terminated Unicode string in
<ConfigRequest> format.
@param Progress On return, points to a character in the Request
string. Points to the string's null terminator if
request was successful. Points to the most recent
'&' before the first failing name/value pair (or
the beginning of the string if the failure is in
the first name/value pair) if the request was not
successful.
@param Results A null-terminated Unicode string in
<ConfigAltResp> format which has all values filled
in for the names in the Request string. String to
be allocated by the called function.
@retval EFI_SUCCESS The Results is filled with the requested values.
@retval EFI_OUT_OF_RESOURCES Not enough memory to store the results.
@retval EFI_INVALID_PARAMETER Request is NULL, illegal syntax, or unknown name.
@retval EFI_NOT_FOUND Routing data doesn't match any storage in this
driver.
**/
EFI_STATUS
EFIAPI
ExtractConfig (
IN CONST EFI_HII_CONFIG_ACCESS_PROTOCOL *This,
IN CONST EFI_STRING Request,
OUT EFI_STRING *Progress,
OUT EFI_STRING *Results
)
{
EFI_STATUS Status;
UINTN BufferSize;
DRIVER_SAMPLE_PRIVATE_DATA *PrivateData;
EFI_HII_CONFIG_ROUTING_PROTOCOL *HiiConfigRouting;
PrivateData = DRIVER_SAMPLE_PRIVATE_FROM_THIS (This);
HiiConfigRouting = PrivateData->HiiConfigRouting;
//
//
// Get Buffer Storage data from EFI variable
//
BufferSize = sizeof (DRIVER_SAMPLE_CONFIGURATION);
Status = gRT->GetVariable (
VariableName,
&mFormSetGuid,
NULL,
&BufferSize,
&PrivateData->Configuration
);
if (EFI_ERROR (Status)) {
return Status;
}
if (Request == NULL) {
//
// Request is set to NULL, return all configurable elements together with ALTCFG
//
Status = ConstructConfigAltResp (
NULL,
NULL,
Results,
&mFormSetGuid,
VariableName,
PrivateData->DriverHandle[0],
&PrivateData->Configuration,
BufferSize,
VfrMyIfrNVDataBlockName,
2,
STRING_TOKEN (STR_STANDARD_DEFAULT_PROMPT),
VfrMyIfrNVDataDefault0000,
STRING_TOKEN (STR_MANUFACTURE_DEFAULT_PROMPT),
VfrMyIfrNVDataDefault0001
);
return Status;
}
//
// Check routing data in <ConfigHdr>.
// Note: if only one Storage is used, then this checking could be skipped.
//
if (!IsConfigHdrMatch (Request, &mFormSetGuid, VariableName)) {
*Progress = Request;
return EFI_NOT_FOUND;
}
//
// Convert buffer data to <ConfigResp> by helper function BlockToConfig()
//
Status = HiiConfigRouting->BlockToConfig (
HiiConfigRouting,
Request,
(UINT8 *) &PrivateData->Configuration,
BufferSize,
Results,
Progress
);
return Status;
}
/**
This function processes the results of changes in configuration.
@param This Points to the EFI_HII_CONFIG_ACCESS_PROTOCOL.
@param Configuration A null-terminated Unicode string in <ConfigResp>
format.
@param Progress A pointer to a string filled in with the offset of
the most recent '&' before the first failing
name/value pair (or the beginning of the string if
the failure is in the first name/value pair) or
the terminating NULL if all was successful.
@retval EFI_SUCCESS The Results is processed successfully.
@retval EFI_INVALID_PARAMETER Configuration is NULL.
@retval EFI_NOT_FOUND Routing data doesn't match any storage in this
driver.
**/
EFI_STATUS
EFIAPI
RouteConfig (
IN CONST EFI_HII_CONFIG_ACCESS_PROTOCOL *This,
IN CONST EFI_STRING Configuration,
OUT EFI_STRING *Progress
)
{
EFI_STATUS Status;
UINTN BufferSize;
DRIVER_SAMPLE_PRIVATE_DATA *PrivateData;
EFI_HII_CONFIG_ROUTING_PROTOCOL *HiiConfigRouting;
if (Configuration == NULL) {
return EFI_INVALID_PARAMETER;
}
PrivateData = DRIVER_SAMPLE_PRIVATE_FROM_THIS (This);
HiiConfigRouting = PrivateData->HiiConfigRouting;
// Check routing data in <ConfigHdr>.
// Note: if only one Storage is used, then this checking could be skipped.
//
if (!IsConfigHdrMatch (Configuration, &mFormSetGuid, VariableName)) {
*Progress = Configuration;
return EFI_NOT_FOUND;
}
//
// Get Buffer Storage data from EFI variable
//
BufferSize = sizeof (DRIVER_SAMPLE_CONFIGURATION);
Status = gRT->GetVariable (
VariableName,
&mFormSetGuid,
NULL,
&BufferSize,
&PrivateData->Configuration
);
if (EFI_ERROR (Status)) {
return Status;
}
//
// Convert <ConfigResp> to buffer data by helper function ConfigToBlock()
//
BufferSize = sizeof (DRIVER_SAMPLE_CONFIGURATION);
Status = HiiConfigRouting->ConfigToBlock (
HiiConfigRouting,
Configuration,
(UINT8 *) &PrivateData->Configuration,
&BufferSize,
Progress
);
if (EFI_ERROR (Status)) {
return Status;
}
//
// Store Buffer Storage back to EFI variable
//
Status = gRT->SetVariable(
VariableName,
&mFormSetGuid,
EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS,
sizeof (DRIVER_SAMPLE_CONFIGURATION),
&PrivateData->Configuration
);
return Status;
}
/**
This function processes the results of changes in configuration.
@param This Points to the EFI_HII_CONFIG_ACCESS_PROTOCOL.
@param Action Specifies the type of action taken by the browser.
@param QuestionId A unique value which is sent to the original
exporting driver so that it can identify the type
of data to expect.
@param Type The type of value for the question.
@param Value A pointer to the data being sent to the original
exporting driver.
@param ActionRequest On return, points to the action requested by the
callback function.
@retval EFI_SUCCESS The callback successfully handled the action.
@retval EFI_OUT_OF_RESOURCES Not enough storage is available to hold the
variable and its data.
@retval EFI_DEVICE_ERROR The variable could not be saved.
@retval EFI_UNSUPPORTED The specified Action is not supported by the
callback.
**/
EFI_STATUS
EFIAPI
DriverCallback (
IN CONST EFI_HII_CONFIG_ACCESS_PROTOCOL *This,
IN EFI_BROWSER_ACTION Action,
IN EFI_QUESTION_ID QuestionId,
IN UINT8 Type,
IN EFI_IFR_TYPE_VALUE *Value,
OUT EFI_BROWSER_ACTION_REQUEST *ActionRequest
)
{
DRIVER_SAMPLE_PRIVATE_DATA *PrivateData;
EFI_STATUS Status;
EFI_HII_UPDATE_DATA UpdateData;
IFR_OPTION *IfrOptionList;
UINT8 MyVar;
if ((Value == NULL) || (ActionRequest == NULL)) {
return EFI_INVALID_PARAMETER;
}
Status = EFI_SUCCESS;
PrivateData = DRIVER_SAMPLE_PRIVATE_FROM_THIS (This);
switch (QuestionId) {
case 0x1234:
//
// Initialize the container for dynamic opcodes
//
IfrLibInitUpdateData (&UpdateData, 0x1000);
IfrOptionList = AllocatePool (2 * sizeof (IFR_OPTION));
ASSERT (IfrOptionList != NULL);
IfrOptionList[0].Flags = 0;
IfrOptionList[0].StringToken = STRING_TOKEN (STR_BOOT_OPTION1);
IfrOptionList[0].Value.u8 = 1;
IfrOptionList[1].Flags = EFI_IFR_OPTION_DEFAULT;
IfrOptionList[1].StringToken = STRING_TOKEN (STR_BOOT_OPTION2);
IfrOptionList[1].Value.u8 = 2;
CreateActionOpCode (
0x1237, // Question ID
STRING_TOKEN(STR_EXIT_TEXT), // Prompt text
STRING_TOKEN(STR_EXIT_TEXT), // Help text
EFI_IFR_FLAG_CALLBACK, // Question flag
0, // Action String ID
&UpdateData // Container for dynamic created opcodes
);
//
// Prepare initial value for the dynamic created oneof Question
//
PrivateData->Configuration.DynamicOneof = 2;
Status = gRT->SetVariable(
VariableName,
&mFormSetGuid,
EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS,
sizeof (DRIVER_SAMPLE_CONFIGURATION),
&PrivateData->Configuration
);
CreateOneOfOpCode (
0x8001, // Question ID (or call it "key")
CONFIGURATION_VARSTORE_ID, // VarStore ID
(UINT16) DYNAMIC_ONE_OF_VAR_OFFSET, // Offset in Buffer Storage
STRING_TOKEN (STR_ONE_OF_PROMPT), // Question prompt text
STRING_TOKEN (STR_ONE_OF_HELP), // Question help text
EFI_IFR_FLAG_CALLBACK, // Question flag
EFI_IFR_NUMERIC_SIZE_1, // Data type of Question Value
IfrOptionList, // Option list
2, // Number of options in Option list
&UpdateData // Container for dynamic created opcodes
);
CreateOrderedListOpCode (
0x8002, // Question ID
CONFIGURATION_VARSTORE_ID, // VarStore ID
(UINT16) DYNAMIC_ORDERED_LIST_VAR_OFFSET, // Offset in Buffer Storage
STRING_TOKEN (STR_BOOT_OPTIONS), // Question prompt text
STRING_TOKEN (STR_BOOT_OPTIONS), // Question help text
EFI_IFR_FLAG_RESET_REQUIRED, // Question flag
0, // Ordered list flag, e.g. EFI_IFR_UNIQUE_SET
EFI_IFR_NUMERIC_SIZE_1, // Data type of Question value
5, // Maximum container
IfrOptionList, // Option list
2, // Number of options in Option list
&UpdateData // Container for dynamic created opcodes
);
CreateGotoOpCode (
1, // Target Form ID
STRING_TOKEN (STR_GOTO_FORM1), // Prompt text
STRING_TOKEN (STR_GOTO_HELP), // Help text
0, // Question flag
0x8003, // Question ID
&UpdateData // Container for dynamic created opcodes
);
Status = IfrLibUpdateForm (
PrivateData->HiiHandle[0], // HII handle
&mFormSetGuid, // Formset GUID
0x1234, // Form ID
0x1234, // Label for where to insert opcodes
TRUE, // Append or replace
&UpdateData // Dynamic created opcodes
);
FreePool (IfrOptionList);
IfrLibFreeUpdateData (&UpdateData);
break;
case 0x5678:
//
// We will reach here once the Question is refreshed
//
IfrLibInitUpdateData (&UpdateData, 0x1000);
IfrOptionList = AllocatePool (2 * sizeof (IFR_OPTION));
ASSERT (IfrOptionList != NULL);
CreateActionOpCode (
0x1237, // Question ID
STRING_TOKEN(STR_EXIT_TEXT), // Prompt text
STRING_TOKEN(STR_EXIT_TEXT), // Help text
EFI_IFR_FLAG_CALLBACK, // Question flag
0, // Action String ID
&UpdateData // Container for dynamic created opcodes
);
Status = IfrLibUpdateForm (
PrivateData->HiiHandle[0], // HII handle
&mFormSetGuid, // Formset GUID
3, // Form ID
0x2234, // Label for where to insert opcodes
TRUE, // Append or replace
&UpdateData // Dynamic created opcodes
);
IfrLibFreeUpdateData (&UpdateData);
//
// Refresh the Question value
//
PrivateData->Configuration.DynamicRefresh++;
Status = gRT->SetVariable(
VariableName,
&mFormSetGuid,
EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS,
sizeof (DRIVER_SAMPLE_CONFIGURATION),
&PrivateData->Configuration
);
//
// Change an EFI Variable storage (MyEfiVar) asynchronous, this will cause
// the first statement in Form 3 be suppressed
//
MyVar = 111;
Status = gRT->SetVariable(
L"MyVar",
&mFormSetGuid,
EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS,
1,
&MyVar
);
break;
case 0x1237:
//
// User press "Exit now", request Browser to exit
//
*ActionRequest = EFI_BROWSER_ACTION_REQUEST_EXIT;
break;
case 0x1238:
//
// User press "Save now", request Browser to save the uncommitted data.
//
*ActionRequest = EFI_BROWSER_ACTION_REQUEST_SUBMIT;
break;
case 0x2000:
//
// When try to set a new password, user will be chanlleged with old password.
// The Callback is responsible for validating old password input by user,
// If Callback return EFI_SUCCESS, it indicates validation pass.
//
switch (PrivateData->PasswordState) {
case BROWSER_STATE_VALIDATE_PASSWORD:
Status = ValidatePassword (PrivateData, Value->string);
if (Status == EFI_SUCCESS) {
PrivateData->PasswordState = BROWSER_STATE_SET_PASSWORD;
}
break;
case BROWSER_STATE_SET_PASSWORD:
Status = SetPassword (PrivateData, Value->string);
PrivateData->PasswordState = BROWSER_STATE_VALIDATE_PASSWORD;
break;
default:
break;
}
break;
default:
break;
}
return Status;
}
/**
Main entry for this driver.
@param ImageHandle Image handle this driver.
@param SystemTable Pointer to SystemTable.
@retval EFI_SUCESS This function always complete successfully.
**/
EFI_STATUS
EFIAPI
DriverSampleInit (
IN EFI_HANDLE ImageHandle,
IN EFI_SYSTEM_TABLE *SystemTable
)
{
EFI_STATUS Status;
EFI_STATUS SavedStatus;
EFI_HII_PACKAGE_LIST_HEADER *PackageList;
EFI_HII_HANDLE HiiHandle[2];
EFI_HANDLE DriverHandle[2];
DRIVER_SAMPLE_PRIVATE_DATA *PrivateData;
EFI_SCREEN_DESCRIPTOR Screen;
EFI_HII_DATABASE_PROTOCOL *HiiDatabase;
EFI_HII_STRING_PROTOCOL *HiiString;
EFI_FORM_BROWSER2_PROTOCOL *FormBrowser2;
EFI_HII_CONFIG_ROUTING_PROTOCOL *HiiConfigRouting;
CHAR16 *NewString;
UINTN BufferSize;
DRIVER_SAMPLE_CONFIGURATION *Configuration;
BOOLEAN ExtractIfrDefault;
//
// Initialize the library and our protocol.
//
//
// Initialize screen dimensions for SendForm().
// Remove 3 characters from top and bottom
//
ZeroMem (&Screen, sizeof (EFI_SCREEN_DESCRIPTOR));
gST->ConOut->QueryMode (gST->ConOut, gST->ConOut->Mode->Mode, &Screen.RightColumn, &Screen.BottomRow);
Screen.TopRow = 3;
Screen.BottomRow = Screen.BottomRow - 3;
//
// Initialize driver private data
//
PrivateData = AllocatePool (sizeof (DRIVER_SAMPLE_PRIVATE_DATA));
if (PrivateData == NULL) {
return EFI_OUT_OF_RESOURCES;
}
PrivateData->Signature = DRIVER_SAMPLE_PRIVATE_SIGNATURE;
PrivateData->ConfigAccess.ExtractConfig = ExtractConfig;
PrivateData->ConfigAccess.RouteConfig = RouteConfig;
PrivateData->ConfigAccess.Callback = DriverCallback;
PrivateData->PasswordState = BROWSER_STATE_VALIDATE_PASSWORD;
//
// Locate Hii Database protocol
//
Status = gBS->LocateProtocol (&gEfiHiiDatabaseProtocolGuid, NULL, (VOID **) &HiiDatabase);
if (EFI_ERROR (Status)) {
return Status;
}
PrivateData->HiiDatabase = HiiDatabase;
//
// Locate HiiString protocol
//
Status = gBS->LocateProtocol (&gEfiHiiStringProtocolGuid, NULL, (VOID **) &HiiString);
if (EFI_ERROR (Status)) {
return Status;
}
PrivateData->HiiString = HiiString;
//
// Locate Formbrowser2 protocol
//
Status = gBS->LocateProtocol (&gEfiFormBrowser2ProtocolGuid, NULL, (VOID **) &FormBrowser2);
if (EFI_ERROR (Status)) {
return Status;
}
PrivateData->FormBrowser2 = FormBrowser2;
//
// Locate ConfigRouting protocol
//
Status = gBS->LocateProtocol (&gEfiHiiConfigRoutingProtocolGuid, NULL, (VOID **) &HiiConfigRouting);
if (EFI_ERROR (Status)) {
return Status;
}
PrivateData->HiiConfigRouting = HiiConfigRouting;
//
// Install Config Access protocol
//
Status = HiiLibCreateHiiDriverHandle (&DriverHandle[0]);
if (EFI_ERROR (Status)) {
return Status;
}
PrivateData->DriverHandle[0] = DriverHandle[0];
Status = gBS->InstallProtocolInterface (
&DriverHandle[0],
&gEfiHiiConfigAccessProtocolGuid,
EFI_NATIVE_INTERFACE,
&PrivateData->ConfigAccess
);
ASSERT_EFI_ERROR (Status);
//
// Publish our HII data
//
PackageList = HiiLibPreparePackageList (
2,
&mFormSetGuid,
DriverSampleStrings,
VfrBin
);
if (PackageList == NULL) {
return EFI_OUT_OF_RESOURCES;
}
Status = HiiDatabase->NewPackageList (
HiiDatabase,
PackageList,
DriverHandle[0],
&HiiHandle[0]
);
FreePool (PackageList);
if (EFI_ERROR (Status)) {
return Status;
}
PrivateData->HiiHandle[0] = HiiHandle[0];
//
// Publish another Fromset
//
Status = HiiLibCreateHiiDriverHandle (&DriverHandle[1]);
if (EFI_ERROR (Status)) {
return Status;
}
PrivateData->DriverHandle[1] = DriverHandle[1];
PackageList = HiiLibPreparePackageList (
2,
&mInventoryGuid,
DriverSampleStrings,
InventoryBin
);
if (PackageList == NULL) {
return EFI_OUT_OF_RESOURCES;
}
Status = HiiDatabase->NewPackageList (
HiiDatabase,
PackageList,
DriverHandle[1],
&HiiHandle[1]
);
FreePool (PackageList);
if (EFI_ERROR (Status)) {
return Status;
}
PrivateData->HiiHandle[1] = HiiHandle[1];
//
// Very simple example of how one would update a string that is already
// in the HII database
//
NewString = L"700 Mhz";
Status = HiiLibSetString (HiiHandle[0], STRING_TOKEN (STR_CPU_STRING2), NewString);
if (EFI_ERROR (Status)) {
return Status;
}
//
// Initialize configuration data
//
Configuration = &PrivateData->Configuration;
ZeroMem (Configuration, sizeof (DRIVER_SAMPLE_CONFIGURATION));
//
// Try to read NV config EFI variable first
//
ExtractIfrDefault = TRUE;
BufferSize = sizeof (DRIVER_SAMPLE_CONFIGURATION);
Status = gRT->GetVariable (VariableName, &mFormSetGuid, NULL, &BufferSize, Configuration);
if (!EFI_ERROR (Status) && (BufferSize == sizeof (DRIVER_SAMPLE_CONFIGURATION))) {
ExtractIfrDefault = FALSE;
}
if (ExtractIfrDefault) {
//
// EFI variable for NV config doesn't exit, we should build this variable
// based on default values stored in IFR
//
BufferSize = sizeof (DRIVER_SAMPLE_CONFIGURATION);
Status = IfrLibExtractDefault (Configuration, &BufferSize, 1, VfrMyIfrNVDataDefault0000);
if (!EFI_ERROR (Status)) {
gRT->SetVariable(
VariableName,
&mFormSetGuid,
EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS,
sizeof (DRIVER_SAMPLE_CONFIGURATION),
Configuration
);
}
}
//
// Example of how to display only the item we sent to HII
//
if (DISPLAY_ONLY_MY_ITEM == 0x0001) {
//
// Have the browser pull out our copy of the data, and only display our data
//
// Status = FormConfig->SendForm (FormConfig, TRUE, HiiHandle, NULL, NULL, NULL, &Screen, NULL);
//
Status = FormBrowser2->SendForm (
FormBrowser2,
HiiHandle,
1,
NULL,
0,
NULL,
NULL
);
SavedStatus = Status;
Status = HiiDatabase->RemovePackageList (HiiDatabase, HiiHandle[0]);
if (EFI_ERROR (Status)) {
return Status;
}
Status = HiiDatabase->RemovePackageList (HiiDatabase, HiiHandle[1]);
if (EFI_ERROR (Status)) {
return Status;
}
return SavedStatus;
} else {
//
// Have the browser pull out all the data in the HII Database and display it.
//
// Status = FormConfig->SendForm (FormConfig, TRUE, 0, NULL, NULL, NULL, NULL, NULL);
//
}
return EFI_SUCCESS;
}
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