src/pld/xilinx_bit.c

   1 /***************************************************************************
   2  *   Copyright (C) 2006 by Dominic Rath                                    *
   3  *   Dominic.Rath@gmx.de                                                   *
   4  *                                                                         *
   5  *   This program is free software; you can redistribute it and/or modify  *
   6  *   it under the terms of the GNU General Public License as published by  *
   7  *   the Free Software Foundation; either version 2 of the License, or     *
   8  *   (at your option) any later version.                                   *
   9  *                                                                         *
  10  *   This program is distributed in the hope that it will be useful,       *
  11  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  12  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  13  *   GNU General Public License for more details.                          *
  14  *                                                                         *
  15  *   You should have received a copy of the GNU General Public License     *
  16  *   along with this program; if not, write to the                         *
  17  *   Free Software Foundation, Inc.,                                       *
  18  *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
  19  ***************************************************************************/
  20 #ifdef HAVE_CONFIG_H
  21 #include "config.h"
  22 #endif
  23
  24 #include "xilinx_bit.h"
  25
  26 #include "pld.h"
  27 #include "log.h"
  28
  29 #include <stdlib.h>
  30 #include <unistd.h>
  31 #include <sys/types.h>
  32 #include <sys/stat.h>
  33 #include <fcntl.h>
  34 #include <string.h>
  35 #include <errno.h>
  36
  37 #include <sys/time.h>
  38 #include <time.h>
  39
  40 int read_section(FILE *input_file, int length_size, char section, u32 *buffer_length, u8 **buffer)
  41 {
  42         u8 length_buffer[4];
  43         u32 length;
  44         char section_char;
  45         int read_count;
  46
  47         if ((length_size != 2) && (length_size != 4))
  48         {
  49                 ERROR("BUG: length_size neither 2 nor 4");
  50                 return ERROR_PLD_FILE_LOAD_FAILED;
  51         }
  52
  53         if ((read_count = fread(&section_char, 1, 1, input_file)) != 1)
  54         {
  55                 return ERROR_PLD_FILE_LOAD_FAILED;
  56         }
  57
  58         if (section_char != section)
  59         {
  60                 return ERROR_PLD_FILE_LOAD_FAILED;
  61         }
  62
  63         if ((read_count = fread(length_buffer, 1, length_size, input_file)) != length_size)
  64         {
  65                 return ERROR_PLD_FILE_LOAD_FAILED;
  66         }
  67
  68         if (length_size == 4)
  69                 length = be_to_h_u32(length_buffer);
  70
  71         if (length_size == 2)
  72                 length = be_to_h_u16(length_buffer);
  73
  74         if (buffer_length)
  75                 *buffer_length = length;
  76
  77         *buffer = malloc(length);
  78
  79         if ((read_count = fread(*buffer, 1, length, input_file)) != length)
  80         {
  81                 return ERROR_PLD_FILE_LOAD_FAILED;
  82         }
  83
  84         return ERROR_OK;
  85 }
  86
  87 int xilinx_read_bit_file(xilinx_bit_file_t *bit_file, char *filename)
  88 {
  89         FILE *input_file;
  90         struct stat input_stat;
  91         int read_count;
  92
  93         if (!filename || !bit_file)
  94                 return ERROR_INVALID_ARGUMENTS;
  95
  96         if (stat(filename, &input_stat) == -1)
  97         {
  98                 ERROR("couldn't stat() %s: %s", filename, strerror(errno));
  99                 return ERROR_PLD_FILE_LOAD_FAILED;
 100         }
 101
 102         if (S_ISDIR(input_stat.st_mode))
 103         {
 104                 ERROR("%s is a directory", filename);
 105                 return ERROR_PLD_FILE_LOAD_FAILED;
 106         }
 107
 108         if (input_stat.st_size == 0){
 109                 ERROR("Empty file %s", filename);
 110                 return ERROR_PLD_FILE_LOAD_FAILED;
 111         }
 112
 113         if (!(input_file = fopen(filename, "rb")))
 114         {
 115                 ERROR("couldn't open %s: %s", filename, strerror(errno));
 116                 return ERROR_PLD_FILE_LOAD_FAILED;
 117         }
 118
 119         if ((read_count = fread(bit_file->unknown_header, 1, 13, input_file)) != 13)
 120         {
 121                 ERROR("couldn't read unknown_header from file '%s'", filename);
 122                 return ERROR_PLD_FILE_LOAD_FAILED;
 123         }
 124
 125         if (read_section(input_file, 2, 'a', NULL, &bit_file->source_file) != ERROR_OK)
 126                 return ERROR_PLD_FILE_LOAD_FAILED;
 127
 128         if (read_section(input_file, 2, 'b', NULL, &bit_file->part_name) != ERROR_OK)
 129                 return ERROR_PLD_FILE_LOAD_FAILED;
 130
 131         if (read_section(input_file, 2, 'c', NULL, &bit_file->date) != ERROR_OK)
 132                 return ERROR_PLD_FILE_LOAD_FAILED;
 133
 134         if (read_section(input_file, 2, 'd', NULL, &bit_file->time) != ERROR_OK)
 135                 return ERROR_PLD_FILE_LOAD_FAILED;
 136
 137         if (read_section(input_file, 4, 'e', &bit_file->length, &bit_file->data) != ERROR_OK)
 138                 return ERROR_PLD_FILE_LOAD_FAILED;
 139
 140         DEBUG("bit_file: %s %s %s,%s %i", bit_file->source_file, bit_file->part_name,
 141                 bit_file->date, bit_file->time, bit_file->length);
 142
 143         fclose(input_file);
 144
 145         return ERROR_OK;
 146 }