Andrew Duggan | 4e81125 | 2014-04-03 15:17:57 -0700 | [diff] [blame] | 1 | //=========================================================================== |
| 2 | // Copyright (c) 2012 Synaptics Incorporated. All rights reserved. |
| 3 | //=========================================================================== |
| 4 | |
| 5 | #include <iostream> |
| 6 | #include <fstream> |
| 7 | #include <string.h> |
| 8 | #include <stdint.h> |
| 9 | |
| 10 | #include "firmware_image.h" |
| 11 | |
| 12 | using namespace std; |
| 13 | |
| 14 | unsigned long FirmwareImage::Checksum(unsigned short * data, unsigned long len) |
| 15 | { |
| 16 | unsigned long checksum = 0xFFFFFFFF; |
| 17 | unsigned long lsw = checksum & 0xFFFF; |
| 18 | unsigned long msw = checksum >> 16; |
| 19 | |
| 20 | while (len--) { |
| 21 | lsw += *data++; |
| 22 | msw += lsw; |
| 23 | lsw = (lsw & 0xffff) + (lsw >> 16); |
| 24 | msw = (msw & 0xffff) + (msw >> 16); |
| 25 | } |
| 26 | |
| 27 | checksum = msw << 16 | lsw; |
| 28 | |
| 29 | return checksum; |
| 30 | } |
| 31 | |
| 32 | int FirmwareImage::Initialize(const char * filename) |
| 33 | { |
| 34 | int rc; |
| 35 | |
| 36 | if (!filename) |
| 37 | return UPDATE_FAIL_INVALID_PARAMETER; |
| 38 | |
| 39 | ifstream ifsFile(filename, ios::in|ios::binary|ios::ate); |
| 40 | if (!ifsFile) |
| 41 | return UPDATE_FAIL_OPEN_FIRMWARE_IMAGE; |
| 42 | |
| 43 | m_imageSize = (unsigned long)ifsFile.tellg(); |
| 44 | m_memBlock = new unsigned char[m_imageSize]; |
| 45 | ifsFile.seekg(0, ios::beg); |
| 46 | ifsFile.read((char*)m_memBlock, m_imageSize); |
| 47 | |
| 48 | rc = ExtractHeader(); |
| 49 | if (rc != UPDATE_SUCCESS) |
| 50 | return rc; |
| 51 | |
| 52 | fprintf(stdout, "Firmware Header:\n"); |
| 53 | PrintHeaderInfo(); |
| 54 | |
| 55 | return UPDATE_SUCCESS; |
| 56 | } |
| 57 | |
| 58 | int FirmwareImage::ExtractHeader() |
| 59 | { |
| 60 | m_checksum = extract_long(&m_memBlock[RMI_IMG_CHECKSUM_OFFSET]); |
| 61 | m_io = m_memBlock[RMI_IMG_IO_OFFSET]; |
| 62 | m_bootloaderVersion = m_memBlock[RMI_IMG_BOOTLOADER_VERSION_OFFSET]; |
| 63 | m_firmwareSize = extract_long(&m_memBlock[RMI_IMG_IMAGE_SIZE_OFFSET]); |
| 64 | m_configSize = extract_long(&m_memBlock[RMI_IMG_CONFIG_SIZE_OFFSET]); |
| 65 | if (m_io == 1) { |
| 66 | m_firmwareBuildID = extract_long(&m_memBlock[RMI_IMG_FW_BUILD_ID_OFFSET]); |
| 67 | m_packageID = extract_long(&m_memBlock[RMI_IMG_PACKAGE_ID_OFFSET]); |
| 68 | } |
| 69 | memcpy(m_productID, &m_memBlock[RMI_IMG_PRODUCT_ID_OFFSET], RMI_PRODUCT_ID_LENGTH); |
| 70 | m_productID[RMI_PRODUCT_ID_LENGTH] = 0; |
| 71 | memcpy(m_productInfo, &m_memBlock[RMI_IMG_PRODUCT_INFO_OFFSET], RMI_IMG_PRODUCT_INFO_LENGTH); |
| 72 | |
| 73 | m_firmwareData = &m_memBlock[RMI_IMG_FW_OFFSET]; |
| 74 | m_configData = &m_memBlock[RMI_IMG_FW_OFFSET + m_firmwareSize]; |
| 75 | |
| 76 | switch (m_bootloaderVersion) { |
| 77 | case 2: |
| 78 | m_lockdownSize = RMI_IMG_LOCKDOWN_V2_SIZE; |
| 79 | m_lockdownData = &m_memBlock[RMI_IMG_LOCKDOWN_V2_OFFSET]; |
| 80 | break; |
| 81 | case 3: |
| 82 | case 4: |
| 83 | m_lockdownSize = RMI_IMG_LOCKDOWN_V3_SIZE; |
| 84 | m_lockdownData = &m_memBlock[RMI_IMG_LOCKDOWN_V3_OFFSET]; |
| 85 | break; |
| 86 | case 5: |
| 87 | m_lockdownSize = RMI_IMG_LOCKDOWN_V5_SIZE; |
| 88 | m_lockdownData = &m_memBlock[RMI_IMG_LOCKDOWN_V5_OFFSET]; |
| 89 | break; |
| 90 | case 6: |
| 91 | // TODO: Add support for V6 |
| 92 | default: |
| 93 | return UPDATE_FAIL_UNSUPPORTED_IMAGE_VERSION; |
| 94 | } |
| 95 | |
| 96 | return UPDATE_SUCCESS; |
| 97 | } |
| 98 | |
| 99 | void FirmwareImage::PrintHeaderInfo() |
| 100 | { |
| 101 | fprintf(stdout, "Checksum:\t\t0x%lx\n", m_checksum); |
| 102 | fprintf(stdout, "Firmware Size:\t\t%ld\n", m_firmwareSize); |
| 103 | fprintf(stdout, "Config Size:\t\t%ld\n", m_configSize); |
| 104 | fprintf(stdout, "Lockdown Size:\t\t%ld\n", m_lockdownSize); |
| 105 | fprintf(stdout, "Firmware Build ID:\t%ld\n", m_firmwareBuildID); |
| 106 | fprintf(stdout, "Package ID:\t\t%d\n", *((unsigned short*)&m_packageID)); |
| 107 | fprintf(stdout, "Bootloader Version:\t%d\n", m_bootloaderVersion); |
| 108 | fprintf(stdout, "Product ID:\t\t%s\n", m_productID); |
| 109 | fprintf(stdout, "Product Info:\t\t%d\n", *((unsigned short*)&m_productInfo)); |
| 110 | fprintf(stdout, "\n"); |
| 111 | } |
| 112 | |
| 113 | int FirmwareImage::VerifyImage(unsigned short deviceFirmwareSize, unsigned short deviceConfigSize) |
| 114 | { |
| 115 | if (m_imageSize < 0x100) |
| 116 | return UPDATE_FAIL_VERIFY_IMAGE; |
| 117 | |
| 118 | unsigned long calculated_checksum = Checksum((uint16_t *)&(m_memBlock[4]), |
| 119 | (unsigned short)(m_imageSize - 4) >> 1); |
| 120 | |
| 121 | if (m_checksum != calculated_checksum) { |
| 122 | fprintf(stderr, "Firmware image checksum verification failed, saw 0x%08lX, calculated 0x%08lX\n", |
| 123 | m_checksum, calculated_checksum); |
| 124 | return UPDATE_FAIL_VERIFY_CHECKSUM; |
| 125 | } |
| 126 | |
| 127 | if (m_firmwareSize != deviceFirmwareSize) { |
| 128 | fprintf(stderr, "Firmware image size verfication failed, size in image %ld did " |
| 129 | "not match device size %d\n", m_firmwareSize, deviceFirmwareSize); |
| 130 | return UPDATE_FAIL_VERIFY_FIRMWARE_SIZE; |
| 131 | } |
| 132 | |
| 133 | if (m_configSize != deviceConfigSize) { |
| 134 | fprintf(stderr, "Firmware image size verfication failed, size in image %ld did " |
| 135 | "not match device size %d\n", m_firmwareSize, deviceConfigSize); |
| 136 | return UPDATE_FAIL_VERIFY_CONFIG_SIZE; |
| 137 | } |
| 138 | |
| 139 | return UPDATE_SUCCESS; |
| 140 | } |
| 141 | |
| 142 | FirmwareImage::~FirmwareImage() |
| 143 | { |
| 144 | delete [] m_memBlock; |
| 145 | m_memBlock = NULL; |
| 146 | } |