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audk/EmbeddedPkg/Application/AndroidFastboot/AndroidFastbootApp.c

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/** @file
Copyright (c) 2013-2014, ARM Ltd. All rights reserved.<BR>
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 "AndroidFastbootApp.h"
#include <Protocol/AndroidFastbootTransport.h>
#include <Protocol/AndroidFastbootPlatform.h>
#include <Protocol/SimpleTextOut.h>
#include <Protocol/SimpleTextIn.h>
#include <Library/PcdLib.h>
#include <Library/UefiRuntimeServicesTableLib.h>
#include <Library/BaseMemoryLib.h>
#include <Library/UefiBootServicesTableLib.h>
#include <Library/UefiApplicationEntryPoint.h>
#include <Library/PrintLib.h>
/*
* UEFI Application using the FASTBOOT_TRANSPORT_PROTOCOL and
* FASTBOOT_PLATFORM_PROTOCOL to implement the Android Fastboot protocol.
*/
STATIC FASTBOOT_TRANSPORT_PROTOCOL *mTransport;
STATIC FASTBOOT_PLATFORM_PROTOCOL *mPlatform;
STATIC EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL *mTextOut;
typedef enum {
ExpectCmdState,
ExpectDataState,
FastbootStateMax
} ANDROID_FASTBOOT_STATE;
STATIC ANDROID_FASTBOOT_STATE mState = ExpectCmdState;
// When in ExpectDataState, the number of bytes of data to expect:
STATIC UINT64 mNumDataBytes;
// .. and the number of bytes so far received this data phase
STATIC UINT64 mBytesReceivedSoFar;
// .. and the buffer to save data into
STATIC UINT8 *mDataBuffer = NULL;
// Event notify functions, from which gBS->Exit shouldn't be called, can signal
// this event when the application should exit
STATIC EFI_EVENT mFinishedEvent;
STATIC EFI_EVENT mFatalSendErrorEvent;
// This macro uses sizeof - only use it on arrays (i.e. string literals)
#define SEND_LITERAL(Str) mTransport->Send ( \
sizeof (Str) - 1, \
Str, \
&mFatalSendErrorEvent \
)
#define MATCH_CMD_LITERAL(Cmd, Buf) !AsciiStrnCmp (Cmd, Buf, sizeof (Cmd) - 1)
#define IS_LOWERCASE_ASCII(Char) (Char >= 'a' && Char <= 'z')
#define FASTBOOT_STRING_MAX_LENGTH 256
#define FASTBOOT_COMMAND_MAX_LENGTH 64
STATIC
VOID
HandleGetVar (
IN CHAR8 *CmdArg
)
{
CHAR8 Response[FASTBOOT_COMMAND_MAX_LENGTH + 1] = "OKAY";
EFI_STATUS Status;
// Respond to getvar:version with 0.4 (version of Fastboot protocol)
if (!AsciiStrnCmp ("version", CmdArg, sizeof ("version") - 1 )) {
SEND_LITERAL ("OKAY" ANDROID_FASTBOOT_VERSION);
} else {
// All other variables are assumed to be platform specific
Status = mPlatform->GetVar (CmdArg, Response + 4);
if (EFI_ERROR (Status)) {
SEND_LITERAL ("FAILSomething went wrong when looking up the variable");
} else {
mTransport->Send (AsciiStrLen (Response), Response, &mFatalSendErrorEvent);
}
}
}
STATIC
VOID
HandleDownload (
IN CHAR8 *NumBytesString
)
{
CHAR8 Response[12] = "DATA";
CHAR16 OutputString[FASTBOOT_STRING_MAX_LENGTH];
// Argument is 8-character ASCII string hex representation of number of bytes
// that will be sent in the data phase.
// Response is "DATA" + that same 8-character string.
// Replace any previously downloaded data
if (mDataBuffer != NULL) {
FreePool (mDataBuffer);
mDataBuffer = NULL;
}
// Parse out number of data bytes to expect
mNumDataBytes = AsciiStrHexToUint64 (NumBytesString);
if (mNumDataBytes == 0) {
mTextOut->OutputString (mTextOut, L"ERROR: Fail to get the number of bytes to download.\r\n");
SEND_LITERAL ("FAILFailed to get the number of bytes to download");
return;
}
UnicodeSPrint (OutputString, sizeof (OutputString), L"Downloading %d bytes\r\n", mNumDataBytes);
mTextOut->OutputString (mTextOut, OutputString);
mDataBuffer = AllocatePool (mNumDataBytes);
if (mDataBuffer == NULL) {
SEND_LITERAL ("FAILNot enough memory");
} else {
AsciiStrnCpy (Response + 4, NumBytesString, 8);
mTransport->Send (sizeof(Response), Response, &mFatalSendErrorEvent);
mState = ExpectDataState;
mBytesReceivedSoFar = 0;
}
}
STATIC
VOID
HandleFlash (
IN CHAR8 *PartitionName
)
{
EFI_STATUS Status;
CHAR16 OutputString[FASTBOOT_STRING_MAX_LENGTH];
// Build output string
UnicodeSPrint (OutputString, sizeof (OutputString), L"Flashing partition %a\r\n", PartitionName);
mTextOut->OutputString (mTextOut, OutputString);
if (mDataBuffer == NULL) {
// Doesn't look like we were sent any data
SEND_LITERAL ("FAILNo data to flash");
return;
}
Status = mPlatform->FlashPartition (
PartitionName,
mNumDataBytes,
mDataBuffer
);
if (Status == EFI_NOT_FOUND) {
SEND_LITERAL ("FAILNo such partition.");
mTextOut->OutputString (mTextOut, L"No such partition.\r\n");
} else if (EFI_ERROR (Status)) {
SEND_LITERAL ("FAILError flashing partition.");
mTextOut->OutputString (mTextOut, L"Error flashing partition.\r\n");
DEBUG ((EFI_D_ERROR, "Couldn't flash image: %r\n", Status));
} else {
mTextOut->OutputString (mTextOut, L"Done.\r\n");
SEND_LITERAL ("OKAY");
}
}
STATIC
VOID
HandleErase (
IN CHAR8 *PartitionName
)
{
EFI_STATUS Status;
CHAR16 OutputString[FASTBOOT_STRING_MAX_LENGTH];
// Build output string
UnicodeSPrint (OutputString, sizeof (OutputString), L"Erasing partition %a\r\n", PartitionName);
mTextOut->OutputString (mTextOut, OutputString);
Status = mPlatform->ErasePartition (PartitionName);
if (EFI_ERROR (Status)) {
SEND_LITERAL ("FAILCheck device console.");
DEBUG ((EFI_D_ERROR, "Couldn't erase image: %r\n", Status));
} else {
SEND_LITERAL ("OKAY");
}
}
STATIC
VOID
HandleBoot (
VOID
)
{
EFI_STATUS Status;
mTextOut->OutputString (mTextOut, L"Booting downloaded image\r\n");
if (mDataBuffer == NULL) {
// Doesn't look like we were sent any data
SEND_LITERAL ("FAILNo image in memory");
return;
}
// We don't really have any choice but to report success, because once we
// boot we lose control of the system.
SEND_LITERAL ("OKAY");
Status = BootAndroidBootImg (mNumDataBytes, mDataBuffer);
if (EFI_ERROR (Status)) {
DEBUG ((EFI_D_ERROR, "Failed to boot downloaded image: %r\n", Status));
}
// We shouldn't get here
}
STATIC
VOID
HandleOemCommand (
IN CHAR8 *Command
)
{
EFI_STATUS Status;
Status = mPlatform->DoOemCommand (Command);
if (Status == EFI_NOT_FOUND) {
SEND_LITERAL ("FAILOEM Command not recognised.");
} else if (Status == EFI_DEVICE_ERROR) {
SEND_LITERAL ("FAILError while executing command");
} else if (EFI_ERROR (Status)) {
SEND_LITERAL ("FAIL");
} else {
SEND_LITERAL ("OKAY");
}
}
STATIC
VOID
AcceptCmd (
IN UINTN Size,
IN CONST CHAR8 *Data
)
{
CHAR8 Command[FASTBOOT_COMMAND_MAX_LENGTH + 1];
// Max command size is 64 bytes
if (Size > FASTBOOT_COMMAND_MAX_LENGTH) {
SEND_LITERAL ("FAILCommand too large");
return;
}
// Commands aren't null-terminated. Let's get a null-terminated version.
AsciiStrnCpy (Command, Data, Size);
Command[Size] = '\0';
// Parse command
if (MATCH_CMD_LITERAL ("getvar", Command)) {
HandleGetVar (Command + sizeof ("getvar"));
} else if (MATCH_CMD_LITERAL ("download", Command)) {
HandleDownload (Command + sizeof ("download"));
} else if (MATCH_CMD_LITERAL ("verify", Command)) {
SEND_LITERAL ("FAILNot supported");
} else if (MATCH_CMD_LITERAL ("flash", Command)) {
HandleFlash (Command + sizeof ("flash"));
} else if (MATCH_CMD_LITERAL ("erase", Command)) {
HandleErase (Command + sizeof ("erase"));
} else if (MATCH_CMD_LITERAL ("boot", Command)) {
HandleBoot ();
} else if (MATCH_CMD_LITERAL ("continue", Command)) {
SEND_LITERAL ("OKAY");
mTextOut->OutputString (mTextOut, L"Received 'continue' command. Exiting Fastboot mode\r\n");
gBS->SignalEvent (mFinishedEvent);
} else if (MATCH_CMD_LITERAL ("reboot", Command)) {
if (MATCH_CMD_LITERAL ("reboot-booloader", Command)) {
// fastboot_protocol.txt:
// "reboot-bootloader Reboot back into the bootloader."
// I guess this means reboot back into fastboot mode to save the user
// having to do whatever they did to get here again.
// Here we just reboot normally.
SEND_LITERAL ("INFOreboot-bootloader not supported, rebooting normally.");
}
SEND_LITERAL ("OKAY");
gRT->ResetSystem (EfiResetCold, EFI_SUCCESS, 0, NULL);
// Shouldn't get here
DEBUG ((EFI_D_ERROR, "Fastboot: gRT->ResetSystem didn't work\n"));
} else if (MATCH_CMD_LITERAL ("powerdown", Command)) {
SEND_LITERAL ("OKAY");
gRT->ResetSystem (EfiResetShutdown, EFI_SUCCESS, 0, NULL);
// Shouldn't get here
DEBUG ((EFI_D_ERROR, "Fastboot: gRT->ResetSystem didn't work\n"));
} else if (MATCH_CMD_LITERAL ("oem", Command)) {
// The "oem" command isn't in the specification, but it was observed in the
// wild, followed by a space, followed by the actual command.
HandleOemCommand (Command + sizeof ("oem"));
} else if (IS_LOWERCASE_ASCII (Command[0])) {
// Commands starting with lowercase ASCII characters are reserved for the
// Fastboot protocol. If we don't recognise it, it's probably the future
// and there are new commmands in the protocol.
// (By the way, the "oem" command mentioned above makes this reservation
// redundant, but we handle it here to be spec-compliant)
SEND_LITERAL ("FAILCommand not recognised. Check Fastboot version.");
} else {
HandleOemCommand (Command);
}
}
STATIC
VOID
AcceptData (
IN UINTN Size,
IN VOID *Data
)
{
UINT32 RemainingBytes = mNumDataBytes - mBytesReceivedSoFar;
CHAR16 OutputString[FASTBOOT_STRING_MAX_LENGTH];
STATIC UINTN Count = 0;
// Protocol doesn't say anything about sending extra data so just ignore it.
if (Size > RemainingBytes) {
Size = RemainingBytes;
}
CopyMem (&mDataBuffer[mBytesReceivedSoFar], Data, Size);
mBytesReceivedSoFar += Size;
// Show download progress. Don't do it for every packet as outputting text
// might be time consuming - do it on the last packet and on every 32nd packet
if ((Count++ % 32) == 0 || Size == RemainingBytes) {
// (Note no newline in format string - it will overwrite the line each time)
UnicodeSPrint (
OutputString,
sizeof (OutputString),
L"\r%8d / %8d bytes downloaded (%d%%)",
mBytesReceivedSoFar,
mNumDataBytes,
(mBytesReceivedSoFar * 100) / mNumDataBytes // percentage
);
mTextOut->OutputString (mTextOut, OutputString);
}
if (mBytesReceivedSoFar == mNumDataBytes) {
// Download finished.
mTextOut->OutputString (mTextOut, L"\r\n");
SEND_LITERAL ("OKAY");
mState = ExpectCmdState;
}
}
/*
This is the NotifyFunction passed to CreateEvent in the FastbootAppEntryPoint
It will be called by the UEFI event framework when the transport protocol
implementation signals that data has been received from the Fastboot host.
The parameters are ignored.
*/
STATIC
VOID
DataReady (
IN EFI_EVENT Event,
IN VOID *Context
)
{
UINTN Size;
VOID *Data;
EFI_STATUS Status;
do {
Status = mTransport->Receive (&Size, &Data);
if (!EFI_ERROR (Status)) {
if (mState == ExpectCmdState) {
AcceptCmd (Size, (CHAR8 *) Data);
} else if (mState == ExpectDataState) {
AcceptData (Size, Data);
} else {
ASSERT (FALSE);
}
FreePool (Data);
}
} while (!EFI_ERROR (Status));
// Quit if there was a fatal error
if (Status != EFI_NOT_READY) {
ASSERT (Status == EFI_DEVICE_ERROR);
// (Put a newline at the beginning as we are probably in the data phase,
// so the download progress line, with no '\n' is probably on the console)
mTextOut->OutputString (mTextOut, L"\r\nFatal error receiving data. Exiting.\r\n");
gBS->SignalEvent (mFinishedEvent);
}
}
/*
Event notify for a fatal error in transmission.
*/
STATIC
VOID
FatalErrorNotify (
IN EFI_EVENT Event,
IN VOID *Context
)
{
mTextOut->OutputString (mTextOut, L"Fatal error sending command response. Exiting.\r\n");
gBS->SignalEvent (mFinishedEvent);
}
EFI_STATUS
EFIAPI
FastbootAppEntryPoint (
IN EFI_HANDLE ImageHandle,
IN EFI_SYSTEM_TABLE *SystemTable
)
{
EFI_STATUS Status;
EFI_EVENT ReceiveEvent;
EFI_EVENT WaitEventArray[2];
UINTN EventIndex;
EFI_SIMPLE_TEXT_INPUT_PROTOCOL *TextIn;
mDataBuffer = NULL;
Status = gBS->LocateProtocol (
&gAndroidFastbootTransportProtocolGuid,
NULL,
(VOID **) &mTransport
);
if (EFI_ERROR (Status)) {
DEBUG ((EFI_D_ERROR, "Fastboot: Couldn't open Fastboot Transport Protocol: %r\n", Status));
return Status;
}
Status = gBS->LocateProtocol (&gAndroidFastbootPlatformProtocolGuid, NULL, (VOID **) &mPlatform);
if (EFI_ERROR (Status)) {
DEBUG ((EFI_D_ERROR, "Fastboot: Couldn't open Fastboot Platform Protocol: %r\n", Status));
return Status;
}
Status = mPlatform->Init ();
if (EFI_ERROR (Status)) {
DEBUG ((EFI_D_ERROR, "Fastboot: Couldn't initialise Fastboot Platform Protocol: %r\n", Status));
return Status;
}
Status = gBS->LocateProtocol (&gEfiSimpleTextOutProtocolGuid, NULL, (VOID **) &mTextOut);
if (EFI_ERROR (Status)) {
DEBUG ((EFI_D_ERROR,
"Fastboot: Couldn't open Text Output Protocol: %r\n", Status
));
return Status;
}
Status = gBS->LocateProtocol (&gEfiSimpleTextInProtocolGuid, NULL, (VOID **) &TextIn);
if (EFI_ERROR (Status)) {
DEBUG ((EFI_D_ERROR, "Fastboot: Couldn't open Text Input Protocol: %r\n", Status));
return Status;
}
// Disable watchdog
Status = gBS->SetWatchdogTimer (0, 0x10000, 0, NULL);
if (EFI_ERROR (Status)) {
DEBUG ((EFI_D_ERROR, "Fastboot: Couldn't disable watchdog timer: %r\n", Status));
}
// Create event for receipt of data from the host
Status = gBS->CreateEvent (
EVT_NOTIFY_SIGNAL,
TPL_CALLBACK,
DataReady,
NULL,
&ReceiveEvent
);
ASSERT_EFI_ERROR (Status);
// Create event for exiting application when "continue" command is received
Status = gBS->CreateEvent (0, TPL_CALLBACK, NULL, NULL, &mFinishedEvent);
ASSERT_EFI_ERROR (Status);
// Create event to pass to FASTBOOT_TRANSPORT_PROTOCOL.Send, signalling a
// fatal error
Status = gBS->CreateEvent (
EVT_NOTIFY_SIGNAL,
TPL_CALLBACK,
FatalErrorNotify,
NULL,
&mFatalSendErrorEvent
);
ASSERT_EFI_ERROR (Status);
// Start listening for data
Status = mTransport->Start (
ReceiveEvent
);
if (EFI_ERROR (Status)) {
DEBUG ((EFI_D_ERROR, "Fastboot: Couldn't start transport: %r\n", Status));
return Status;
}
// Talk to the user
mTextOut->OutputString (mTextOut,
L"Android Fastboot mode - version " ANDROID_FASTBOOT_VERSION ". Press any key to quit.\r\n");
// Quit when the user presses any key, or mFinishedEvent is signalled
WaitEventArray[0] = mFinishedEvent;
WaitEventArray[1] = TextIn->WaitForKey;
gBS->WaitForEvent (2, WaitEventArray, &EventIndex);
mTransport->Stop ();
if (EFI_ERROR (Status)) {
DEBUG ((EFI_D_ERROR, "Warning: Fastboot Transport Stop: %r\n", Status));
}
mPlatform->UnInit ();
return EFI_SUCCESS;
}
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