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////////////////////////////////////////////////////////////////////////////////

//

// Filename:    dumpflash.cpp

//

// Project:     OpenArty, an entirely open SoC based upon the Arty platform

//

// Purpose:     Read/Empty the entire contents of the flash memory to a file.

//              The flash is unchanged by this process.

//

// Creator:     Dan Gisselquist, Ph.D.

//              Gisselquist Technology, LLC

//

////////////////////////////////////////////////////////////////////////////////

//

// Copyright (C) 2015-2017, Gisselquist Technology, LLC

//

// This program is free software (firmware): you can redistribute it and/or

// modify it under the terms of  the GNU General Public License as published

// by the Free Software Foundation, either version 3 of the License, or (at

// your option) any later version.

//

// This program is distributed in the hope that it will be useful, but WITHOUT

// ANY WARRANTY; without even the implied warranty of MERCHANTIBILITY or

// FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

// for more details.

//

// You should have received a copy of the GNU General Public License along

// with this program.  (It's in the $(ROOT)/doc directory.  Run make with no

// target there if the PDF file isn't present.)  If not, see

// <http://www.gnu.org/licenses/> for a copy.

//

// License:     GPL, v3, as defined and found on www.gnu.org,

//              http://www.gnu.org/licenses/gpl.html

//

//

////////////////////////////////////////////////////////////////////////////////

//

//

#include <stdio.h>

#include <stdlib.h>

#include <unistd.h>

#include <strings.h>

#include <ctype.h>

#include <string.h>

#include <signal.h>

#include <assert.h>

#include "port.h"

#include "regdefs.h"

FPGA    *m_fpga;

void    closeup(int v) {

        m_fpga->kill();

        exit(0);

}

#define DUMPMEM         EQSPIFLASH

#define DUMPWORDS       (FLASHLEN>>2)

int main(int argc, char **argv) {

        FILE    *fp;

        const int       BUFLN = FLASHLEN;

        char    *buf = new char[FLASHLEN];

        FPGAOPEN(m_fpga);

        fprintf(stderr, "Before starting, nread = %ld\n",

                m_fpga->m_total_nread);

        // Start with testing the version:

        printf("VERSION: %08x\n", m_fpga->readio(R_VERSION));

        // SPI flash testing

        // Enable the faster (vector) reads

        bool    vector_read = true;

        unsigned        sz;

        if (vector_read) {

                m_fpga->readi(DUMPMEM, BUFLN>>2, (DEVBUS::BUSW *)&buf[0]);

                byteswapbuf(BUFLN>>2, buf);

        } else {

                for(int i=0; i<BUFLN; i+=4) {

                        DEVBUS::BUSW    word;

                        word = m_fpga->readio(DUMPMEM+i);

                        buf[i  ] = (word>>24) & 0x0ff;

                        buf[i+1] = (word>>16) & 0x0ff;

                        buf[i+2] = (word>> 8) & 0x0ff;

                        buf[i+3] = (word    ) & 0x0ff;

                }

        }

        printf("\nREAD-COMPLETE\n");

        // Now, let's find the end

        sz = BUFLN-1;

        while((sz>0)&&((unsigned char)buf[sz] == 0xff))

                sz--;

        sz+=1;

#define FLASHFILE       "eqspidump.bin"

        if (access(FLASHFILE, F_OK)==0) {

                fprintf(stderr, "Cowardly refusing to overwrite %s\n", FLASHFILE);

                exit(EXIT_FAILURE);

        }

        fp = fopen(FLASHFILE,"w");

        fwrite(buf, sizeof(buf[0]), sz, fp);

        fclose(fp);

        printf("The read was accomplished in %ld bytes over the UART\n",

                m_fpga->m_total_nread);

        if (m_fpga->poll())

                printf("FPGA was interrupted\n");

        delete  m_fpga;

}