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/*
* Copyright (C) 2012 - 2014 Andrew Duggan
* Copyright (C) 2012 - 2014 Synaptics Inc
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <iostream>
#include <fstream>
#include <string.h>
#include <stdint.h>
#include <stdlib.h>
#include "firmware_image.h"
using namespace std;
unsigned long FirmwareImage::Checksum(unsigned short * data, unsigned long len)
{
unsigned long checksum = 0xFFFFFFFF;
unsigned long lsw = checksum & 0xFFFF;
unsigned long msw = checksum >> 16;
while (len--) {
lsw += *data++;
msw += lsw;
lsw = (lsw & 0xffff) + (lsw >> 16);
msw = (msw & 0xffff) + (msw >> 16);
}
checksum = msw << 16 | lsw;
return checksum;
}
int FirmwareImage::Initialize(const char * filename)
{
if (!filename)
return UPDATE_FAIL_INVALID_PARAMETER;
ifstream ifsFile(filename, ios::in|ios::binary|ios::ate);
if (!ifsFile)
return UPDATE_FAIL_OPEN_FIRMWARE_IMAGE;
ifsFile.seekg(0, ios::end);
m_imageSize = ifsFile.tellg();
if (m_imageSize < 0)
return UPDATE_FAIL_OPEN_FIRMWARE_IMAGE;
m_memBlock = new unsigned char[m_imageSize];
ifsFile.seekg(0, ios::beg);
ifsFile.read((char*)m_memBlock, m_imageSize);
if (m_imageSize < 0x100)
return UPDATE_FAIL_VERIFY_IMAGE;
m_checksum = extract_long(&m_memBlock[RMI_IMG_CHECKSUM_OFFSET]);
unsigned long imageSizeMinusChecksum = m_imageSize - 4;
if ((imageSizeMinusChecksum % 2) != 0)
/*
* Since the header size is fixed and the firmware is
* in 16 byte blocks a valid image size should always be
* divisible by 2.
*/
return UPDATE_FAIL_VERIFY_IMAGE;
unsigned long calculated_checksum = Checksum((uint16_t *)&(m_memBlock[4]),
imageSizeMinusChecksum >> 1);
if (m_checksum != calculated_checksum) {
fprintf(stderr, "Firmware image checksum verification failed, saw 0x%08lX, calculated 0x%08lX\n",
m_checksum, calculated_checksum);
return UPDATE_FAIL_VERIFY_CHECKSUM;
}
m_io = m_memBlock[RMI_IMG_IO_OFFSET];
m_bootloaderVersion = m_memBlock[RMI_IMG_BOOTLOADER_VERSION_OFFSET];
m_firmwareSize = extract_long(&m_memBlock[RMI_IMG_IMAGE_SIZE_OFFSET]);
if ((unsigned long)m_imageSize - RMI_IMG_FW_OFFSET - 1 < m_firmwareSize) {
fprintf(stderr, "Supplied firmware image size too large, goes out of image file size bound\n");
return UPDATE_FAIL_VERIFY_FIRMWARE_SIZE;
}
m_configSize = extract_long(&m_memBlock[RMI_IMG_CONFIG_SIZE_OFFSET]);
if (m_io == 1) {
m_firmwareBuildID = extract_long(&m_memBlock[RMI_IMG_FW_BUILD_ID_OFFSET]);
m_packageID = extract_long(&m_memBlock[RMI_IMG_PACKAGE_ID_OFFSET]);
}
memcpy(m_productID, &m_memBlock[RMI_IMG_PRODUCT_ID_OFFSET], RMI_PRODUCT_ID_LENGTH);
m_productID[RMI_PRODUCT_ID_LENGTH] = 0;
m_productInfo = extract_short(&m_memBlock[RMI_IMG_PRODUCT_INFO_OFFSET]);
m_firmwareData = &m_memBlock[RMI_IMG_FW_OFFSET];
m_configData = &m_memBlock[RMI_IMG_FW_OFFSET + m_firmwareSize];
switch (m_bootloaderVersion) {
case 2:
m_lockdownSize = RMI_IMG_LOCKDOWN_V2_SIZE;
m_lockdownData = &m_memBlock[RMI_IMG_LOCKDOWN_V2_OFFSET];
break;
case 3:
case 4:
m_lockdownSize = RMI_IMG_LOCKDOWN_V3_SIZE;
m_lockdownData = &m_memBlock[RMI_IMG_LOCKDOWN_V3_OFFSET];
break;
case 5:
case 6:
m_lockdownSize = RMI_IMG_LOCKDOWN_V5_SIZE;
m_lockdownData = &m_memBlock[RMI_IMG_LOCKDOWN_V5_OFFSET];
break;
default:
return UPDATE_FAIL_UNSUPPORTED_IMAGE_VERSION;
}
fprintf(stdout, "Firmware Header:\n");
PrintHeaderInfo();
return UPDATE_SUCCESS;
}
void FirmwareImage::PrintHeaderInfo()
{
fprintf(stdout, "Checksum:\t\t0x%lx\n", m_checksum);
fprintf(stdout, "Firmware Size:\t\t%ld\n", m_firmwareSize);
fprintf(stdout, "Config Size:\t\t%ld\n", m_configSize);
fprintf(stdout, "Lockdown Size:\t\t%ld\n", m_lockdownSize);
fprintf(stdout, "Firmware Build ID:\t%ld\n", m_firmwareBuildID);
fprintf(stdout, "Package ID:\t\t%d\n", m_packageID);
fprintf(stdout, "Bootloader Version:\t%d\n", m_bootloaderVersion);
fprintf(stdout, "Product ID:\t\t%s\n", m_productID);
fprintf(stdout, "Product Info:\t\t%d\n", m_productInfo);
fprintf(stdout, "\n");
}
int FirmwareImage::VerifyImageMatchesDevice(unsigned long deviceFirmwareSize,
unsigned long deviceConfigSize)
{
if (m_firmwareSize != deviceFirmwareSize) {
fprintf(stderr, "Firmware image size verfication failed, size in image %ld did "
"not match device size %ld\n", m_firmwareSize, deviceFirmwareSize);
return UPDATE_FAIL_VERIFY_FIRMWARE_SIZE;
}
if (m_configSize != deviceConfigSize) {
fprintf(stderr, "Firmware image size verfication failed, size in image %ld did "
"not match device size %ld\n", m_firmwareSize, deviceConfigSize);
return UPDATE_FAIL_VERIFY_CONFIG_SIZE;
}
return UPDATE_SUCCESS;
}
FirmwareImage::~FirmwareImage()
{
delete [] m_memBlock;
m_memBlock = NULL;
}
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