Andrew Duggan | 052556f | 2014-04-16 11:32:30 -0700 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright (C) 2012 - 2014 Andrew Duggan |
| 3 | * Copyright (C) 2012 - 2014 Synaptics Inc |
| 4 | * |
| 5 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 6 | * you may not use this file except in compliance with the License. |
| 7 | * You may obtain a copy of the License at |
| 8 | * |
| 9 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 10 | * |
| 11 | * Unless required by applicable law or agreed to in writing, software |
| 12 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 13 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 14 | * See the License for the specific language governing permissions and |
| 15 | * limitations under the License. |
| 16 | */ |
Andrew Duggan | 4e81125 | 2014-04-03 15:17:57 -0700 | [diff] [blame] | 17 | |
| 18 | #include <iostream> |
| 19 | #include <fstream> |
| 20 | #include <string.h> |
| 21 | #include <stdint.h> |
| 22 | |
| 23 | #include "firmware_image.h" |
| 24 | |
| 25 | using namespace std; |
| 26 | |
| 27 | unsigned long FirmwareImage::Checksum(unsigned short * data, unsigned long len) |
| 28 | { |
| 29 | unsigned long checksum = 0xFFFFFFFF; |
| 30 | unsigned long lsw = checksum & 0xFFFF; |
| 31 | unsigned long msw = checksum >> 16; |
| 32 | |
| 33 | while (len--) { |
| 34 | lsw += *data++; |
| 35 | msw += lsw; |
| 36 | lsw = (lsw & 0xffff) + (lsw >> 16); |
| 37 | msw = (msw & 0xffff) + (msw >> 16); |
| 38 | } |
| 39 | |
| 40 | checksum = msw << 16 | lsw; |
| 41 | |
| 42 | return checksum; |
| 43 | } |
| 44 | |
| 45 | int FirmwareImage::Initialize(const char * filename) |
| 46 | { |
| 47 | int rc; |
| 48 | |
| 49 | if (!filename) |
| 50 | return UPDATE_FAIL_INVALID_PARAMETER; |
| 51 | |
| 52 | ifstream ifsFile(filename, ios::in|ios::binary|ios::ate); |
| 53 | if (!ifsFile) |
| 54 | return UPDATE_FAIL_OPEN_FIRMWARE_IMAGE; |
| 55 | |
| 56 | m_imageSize = (unsigned long)ifsFile.tellg(); |
| 57 | m_memBlock = new unsigned char[m_imageSize]; |
| 58 | ifsFile.seekg(0, ios::beg); |
| 59 | ifsFile.read((char*)m_memBlock, m_imageSize); |
| 60 | |
| 61 | rc = ExtractHeader(); |
| 62 | if (rc != UPDATE_SUCCESS) |
| 63 | return rc; |
| 64 | |
| 65 | fprintf(stdout, "Firmware Header:\n"); |
| 66 | PrintHeaderInfo(); |
| 67 | |
| 68 | return UPDATE_SUCCESS; |
| 69 | } |
| 70 | |
| 71 | int FirmwareImage::ExtractHeader() |
| 72 | { |
| 73 | m_checksum = extract_long(&m_memBlock[RMI_IMG_CHECKSUM_OFFSET]); |
| 74 | m_io = m_memBlock[RMI_IMG_IO_OFFSET]; |
| 75 | m_bootloaderVersion = m_memBlock[RMI_IMG_BOOTLOADER_VERSION_OFFSET]; |
| 76 | m_firmwareSize = extract_long(&m_memBlock[RMI_IMG_IMAGE_SIZE_OFFSET]); |
| 77 | m_configSize = extract_long(&m_memBlock[RMI_IMG_CONFIG_SIZE_OFFSET]); |
| 78 | if (m_io == 1) { |
| 79 | m_firmwareBuildID = extract_long(&m_memBlock[RMI_IMG_FW_BUILD_ID_OFFSET]); |
| 80 | m_packageID = extract_long(&m_memBlock[RMI_IMG_PACKAGE_ID_OFFSET]); |
| 81 | } |
| 82 | memcpy(m_productID, &m_memBlock[RMI_IMG_PRODUCT_ID_OFFSET], RMI_PRODUCT_ID_LENGTH); |
| 83 | m_productID[RMI_PRODUCT_ID_LENGTH] = 0; |
| 84 | memcpy(m_productInfo, &m_memBlock[RMI_IMG_PRODUCT_INFO_OFFSET], RMI_IMG_PRODUCT_INFO_LENGTH); |
| 85 | |
| 86 | m_firmwareData = &m_memBlock[RMI_IMG_FW_OFFSET]; |
| 87 | m_configData = &m_memBlock[RMI_IMG_FW_OFFSET + m_firmwareSize]; |
| 88 | |
| 89 | switch (m_bootloaderVersion) { |
| 90 | case 2: |
| 91 | m_lockdownSize = RMI_IMG_LOCKDOWN_V2_SIZE; |
| 92 | m_lockdownData = &m_memBlock[RMI_IMG_LOCKDOWN_V2_OFFSET]; |
| 93 | break; |
| 94 | case 3: |
| 95 | case 4: |
| 96 | m_lockdownSize = RMI_IMG_LOCKDOWN_V3_SIZE; |
| 97 | m_lockdownData = &m_memBlock[RMI_IMG_LOCKDOWN_V3_OFFSET]; |
| 98 | break; |
| 99 | case 5: |
| 100 | m_lockdownSize = RMI_IMG_LOCKDOWN_V5_SIZE; |
| 101 | m_lockdownData = &m_memBlock[RMI_IMG_LOCKDOWN_V5_OFFSET]; |
| 102 | break; |
| 103 | case 6: |
| 104 | // TODO: Add support for V6 |
| 105 | default: |
| 106 | return UPDATE_FAIL_UNSUPPORTED_IMAGE_VERSION; |
| 107 | } |
| 108 | |
| 109 | return UPDATE_SUCCESS; |
| 110 | } |
| 111 | |
| 112 | void FirmwareImage::PrintHeaderInfo() |
| 113 | { |
| 114 | fprintf(stdout, "Checksum:\t\t0x%lx\n", m_checksum); |
| 115 | fprintf(stdout, "Firmware Size:\t\t%ld\n", m_firmwareSize); |
| 116 | fprintf(stdout, "Config Size:\t\t%ld\n", m_configSize); |
| 117 | fprintf(stdout, "Lockdown Size:\t\t%ld\n", m_lockdownSize); |
| 118 | fprintf(stdout, "Firmware Build ID:\t%ld\n", m_firmwareBuildID); |
| 119 | fprintf(stdout, "Package ID:\t\t%d\n", *((unsigned short*)&m_packageID)); |
| 120 | fprintf(stdout, "Bootloader Version:\t%d\n", m_bootloaderVersion); |
| 121 | fprintf(stdout, "Product ID:\t\t%s\n", m_productID); |
| 122 | fprintf(stdout, "Product Info:\t\t%d\n", *((unsigned short*)&m_productInfo)); |
| 123 | fprintf(stdout, "\n"); |
| 124 | } |
| 125 | |
| 126 | int FirmwareImage::VerifyImage(unsigned short deviceFirmwareSize, unsigned short deviceConfigSize) |
| 127 | { |
| 128 | if (m_imageSize < 0x100) |
| 129 | return UPDATE_FAIL_VERIFY_IMAGE; |
| 130 | |
| 131 | unsigned long calculated_checksum = Checksum((uint16_t *)&(m_memBlock[4]), |
| 132 | (unsigned short)(m_imageSize - 4) >> 1); |
| 133 | |
| 134 | if (m_checksum != calculated_checksum) { |
| 135 | fprintf(stderr, "Firmware image checksum verification failed, saw 0x%08lX, calculated 0x%08lX\n", |
| 136 | m_checksum, calculated_checksum); |
| 137 | return UPDATE_FAIL_VERIFY_CHECKSUM; |
| 138 | } |
| 139 | |
| 140 | if (m_firmwareSize != deviceFirmwareSize) { |
| 141 | fprintf(stderr, "Firmware image size verfication failed, size in image %ld did " |
| 142 | "not match device size %d\n", m_firmwareSize, deviceFirmwareSize); |
| 143 | return UPDATE_FAIL_VERIFY_FIRMWARE_SIZE; |
| 144 | } |
| 145 | |
| 146 | if (m_configSize != deviceConfigSize) { |
| 147 | fprintf(stderr, "Firmware image size verfication failed, size in image %ld did " |
| 148 | "not match device size %d\n", m_firmwareSize, deviceConfigSize); |
| 149 | return UPDATE_FAIL_VERIFY_CONFIG_SIZE; |
| 150 | } |
| 151 | |
| 152 | return UPDATE_SUCCESS; |
| 153 | } |
| 154 | |
| 155 | FirmwareImage::~FirmwareImage() |
| 156 | { |
| 157 | delete [] m_memBlock; |
| 158 | m_memBlock = NULL; |
| 159 | } |