flash.cpp

#include "flash.h"

#include <iostream>
#include <fstream>
#include <iomanip>
#include "bc_def.h"
#include "stopwatch.h"

static const uint32_t crc_table[] =
{
    0x00000000, 0x77073096, 0xEE0E612C, 0x990951BA, 0x076DC419, 0x706AF48F,
    0xE963A535, 0x9E6495A3, 0x0EDB8832, 0x79DCB8A4, 0xE0D5E91E, 0x97D2D988,
    0x09B64C2B, 0x7EB17CBD, 0xE7B82D07, 0x90BF1D91, 0x1DB71064, 0x6AB020F2,
    0xF3B97148, 0x84BE41DE, 0x1ADAD47D, 0x6DDDE4EB, 0xF4D4B551, 0x83D385C7,
    0x136C9856, 0x646BA8C0, 0xFD62F97A, 0x8A65C9EC, 0x14015C4F, 0x63066CD9,
    0xFA0F3D63, 0x8D080DF5, 0x3B6E20C8, 0x4C69105E, 0xD56041E4, 0xA2677172,
    0x3C03E4D1, 0x4B04D447, 0xD20D85FD, 0xA50AB56B, 0x35B5A8FA, 0x42B2986C,
    0xDBBBC9D6, 0xACBCF940, 0x32D86CE3, 0x45DF5C75, 0xDCD60DCF, 0xABD13D59,
    0x26D930AC, 0x51DE003A, 0xC8D75180, 0xBFD06116, 0x21B4F4B5, 0x56B3C423,
    0xCFBA9599, 0xB8BDA50F, 0x2802B89E, 0x5F058808, 0xC60CD9B2, 0xB10BE924,
    0x2F6F7C87, 0x58684C11, 0xC1611DAB, 0xB6662D3D, 0x76DC4190, 0x01DB7106,
    0x98D220BC, 0xEFD5102A, 0x71B18589, 0x06B6B51F, 0x9FBFE4A5, 0xE8B8D433,
    0x7807C9A2, 0x0F00F934, 0x9609A88E, 0xE10E9818, 0x7F6A0DBB, 0x086D3D2D,
    0x91646C97, 0xE6635C01, 0x6B6B51F4, 0x1C6C6162, 0x856530D8, 0xF262004E,
    0x6C0695ED, 0x1B01A57B, 0x8208F4C1, 0xF50FC457, 0x65B0D9C6, 0x12B7E950,
    0x8BBEB8EA, 0xFCB9887C, 0x62DD1DDF, 0x15DA2D49, 0x8CD37CF3, 0xFBD44C65,
    0x4DB26158, 0x3AB551CE, 0xA3BC0074, 0xD4BB30E2, 0x4ADFA541, 0x3DD895D7,
    0xA4D1C46D, 0xD3D6F4FB, 0x4369E96A, 0x346ED9FC, 0xAD678846, 0xDA60B8D0,
    0x44042D73, 0x33031DE5, 0xAA0A4C5F, 0xDD0D7CC9, 0x5005713C, 0x270241AA,
    0xBE0B1010, 0xC90C2086, 0x5768B525, 0x206F85B3, 0xB966D409, 0xCE61E49F,
    0x5EDEF90E, 0x29D9C998, 0xB0D09822, 0xC7D7A8B4, 0x59B33D17, 0x2EB40D81,
    0xB7BD5C3B, 0xC0BA6CAD, 0xEDB88320, 0x9ABFB3B6, 0x03B6E20C, 0x74B1D29A,
    0xEAD54739, 0x9DD277AF, 0x04DB2615, 0x73DC1683, 0xE3630B12, 0x94643B84,
    0x0D6D6A3E, 0x7A6A5AA8, 0xE40ECF0B, 0x9309FF9D, 0x0A00AE27, 0x7D079EB1,
    0xF00F9344, 0x8708A3D2, 0x1E01F268, 0x6906C2FE, 0xF762575D, 0x806567CB,
    0x196C3671, 0x6E6B06E7, 0xFED41B76, 0x89D32BE0, 0x10DA7A5A, 0x67DD4ACC,
    0xF9B9DF6F, 0x8EBEEFF9, 0x17B7BE43, 0x60B08ED5, 0xD6D6A3E8, 0xA1D1937E,
    0x38D8C2C4, 0x4FDFF252, 0xD1BB67F1, 0xA6BC5767, 0x3FB506DD, 0x48B2364B,
    0xD80D2BDA, 0xAF0A1B4C, 0x36034AF6, 0x41047A60, 0xDF60EFC3, 0xA867DF55,
    0x316E8EEF, 0x4669BE79, 0xCB61B38C, 0xBC66831A, 0x256FD2A0, 0x5268E236,
    0xCC0C7795, 0xBB0B4703, 0x220216B9, 0x5505262F, 0xC5BA3BBE, 0xB2BD0B28,
    0x2BB45A92, 0x5CB36A04, 0xC2D7FFA7, 0xB5D0CF31, 0x2CD99E8B, 0x5BDEAE1D,
    0x9B64C2B0, 0xEC63F226, 0x756AA39C, 0x026D930A, 0x9C0906A9, 0xEB0E363F,
    0x72076785, 0x05005713, 0x95BF4A82, 0xE2B87A14, 0x7BB12BAE, 0x0CB61B38,
    0x92D28E9B, 0xE5D5BE0D, 0x7CDCEFB7, 0x0BDBDF21, 0x86D3D2D4, 0xF1D4E242,
    0x68DDB3F8, 0x1FDA836E, 0x81BE16CD, 0xF6B9265B, 0x6FB077E1, 0x18B74777,
    0x88085AE6, 0xFF0F6A70, 0x66063BCA, 0x11010B5C, 0x8F659EFF, 0xF862AE69,
    0x616BFFD3, 0x166CCF45, 0xA00AE278, 0xD70DD2EE, 0x4E048354, 0x3903B3C2,
    0xA7672661, 0xD06016F7, 0x4969474D, 0x3E6E77DB, 0xAED16A4A, 0xD9D65ADC,
    0x40DF0B66, 0x37D83BF0, 0xA9BCAE53, 0xDEBB9EC5, 0x47B2CF7F, 0x30B5FFE9,
    0xBDBDF21C, 0xCABAC28A, 0x53B39330, 0x24B4A3A6, 0xBAD03605, 0xCDD70693,
    0x54DE5729, 0x23D967BF, 0xB3667A2E, 0xC4614AB8, 0x5D681B02, 0x2A6F2B94,
    0xB40BBE37, 0xC30C8EA1, 0x5A05DF1B, 0x2D02EF8D
};

Flash::Flash()
{
    programmer = UsbProgrammer::getProgrammer();
}

bool Flash::dump(string filename)
{
    //if(!manager.IsSupported()) return false; //not needed
    if(!manager.XapResetAndStop()) return false;
    if(!bootprog_load_and_run()) return false;

    ofstream file(filename.c_str());
    uint16_t buffer[0x1000];
    unsigned int line = 0;
    StopWatch timer;

    file << hex << setfill('0');

    int sector_count = read_flash_size();

    programmer->SetTransferSpeed(4);

    cout << "Dumping started." << endl;
    timer.start();
    for(int x=0; x<sector_count; x++) {
        cout << "Trying to read sector " << x << endl;

        setsector(x*0x1000);
        programmer->Write(boot_cmd,4);
        manager.XapGo();
        wait_to_stop(300);

        programmer->ReadBlock(boot_page_buffer0, 0x1000, buffer);

        uint32_t readed_crc = read_flashcrc();
        uint32_t calculated_crc = calc_crc(buffer,0x1000);
        if(readed_crc != calculated_crc)
            cout << "CRC DON'T match - Readed: 0x" << hex << readed_crc
                 << " Calulated: 0x" << calculated_crc << dec << endl;

        for(int index=0; index<0x1000; index++) {
            file << "@" << setw(6) << line++
                 << " " << setw(4) << buffer[index] << endl;
        }
    }
    cout << "Dumping ended in " << timer.elapsedsec() << " seconds." << endl;

    return true;
}

int Flash::read_flash_size()
{
    uint16_t sectors;

    programmer->Write(boot_cmd,1);
    manager.XapGo();
    wait_to_stop(2000);

    if (boot_flash_sectors_available)
        programmer->Read(boot_flash_sectors_available,&sectors);
    else {
        programmer->Read(boot_flash_size_pow ,&sectors);
        sectors = 1 << (sectors - 13);
    }

    cout << "Found " << sectors << " sectors on flash device." << endl;

    return sectors;
}

uint32_t Flash::read_flashcrc()
{
    uint16_t high,low;

    programmer->Read(boot_result, &high);
    programmer->Read(boot_result+1, &low);

    return low | (high << 16);
}

void Flash::setsector(uint32_t sector)
{
    programmer->Write(boot_flash_addr, sector >> 16);
    programmer->Write(boot_flash_addr+1,sector);
}

bool Flash::bootprog_run()
{
    // set xtal speed to 26 MHz
    int xtalsetting1 = 0x6F00;
    int xtalsetting2 = 0x0E00;
    programmer->Write(boot_addr,  xtalsetting1 | 0x10);
    programmer->Write(boot_addr+2,xtalsetting2 | 0x10);

    //run bootprog
    int address = (boot_addr-0xA000)+0x140000;
    programmer->Write(XAP_PCH, address >> 16);
    programmer->Write(XAP_PCL, address);

    if(!manager.XapGo()) return false;
    return wait_to_stop(3000);
}

bool Flash::bootprog_load_and_run()
{
    bool iserror = false;

    cout << "Downloading Flash Stub..." << endl;
    for(int i=0; i<3; i++) {
        // load boot program
        programmer->Write(GBL_MISC2_ENABLES,0);
        programmer->WriteBlock(prog_data_addr,
                               prog_data_length,
                               boot_prog_data);
        programmer->WriteBlock(prog_code_addr,
                               prog_code_length,
                               boot_prog_code);

        if(!bootprog_run()) {
            iserror = true;
            cout << "Could not download boot program" << endl;
        } else
            break;
    }

    if(iserror) return false;

    return programmer->Write(boot_test_mode, 0);
}

bool Flash::wait_to_stop(int timeout)
{
    StopWatch timer;
    timer.start();
    while(!programmer->IsXAPStopped() && timer.elapsedmsec() < timeout)
        usleep(1000);

    if(timer.elapsedmsec() > timeout)
        return false;

    // I'm not sure why this check is needed
    unsigned short data;
    programmer->Read(boot_cmd,&data);
    return !data;
}

uint32_t Flash::calc_crc(uint16_t *buffer, uint32_t length)
{
  uint32_t crc = 0xffffffff;

  for(uint32_t index=0;index<length;index++)
  {
    crc = crc_table[(crc ^ (buffer[index] >> 8)) & 0xff] ^ (crc >> 8);
    crc = crc_table[(crc ^  buffer[index]      ) & 0xff] ^ (crc >> 8);
  }

  return crc;
}