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 #include "pld.h"
  26 #include <helper/log.h>
  27
  28 #include <sys/stat.h>
  29
  30
  31 static int read_section(FILE *input_file, int length_size, char section,
  32                 uint32_t *buffer_length, uint8_t **buffer)
  33 {
  34         uint8_t length_buffer[4];
  35         int length;
  36         char section_char;
  37         int read_count;
  38
  39         if ((length_size != 2) && (length_size != 4))
  40         {
  41                 LOG_ERROR("BUG: length_size neither 2 nor 4");
  42                 return ERROR_PLD_FILE_LOAD_FAILED;
  43         }
  44
  45         if ((read_count = fread(&section_char, 1, 1, input_file)) != 1)
  46         {
  47                 return ERROR_PLD_FILE_LOAD_FAILED;
  48         }
  49
  50         if (section_char != section)
  51         {
  52                 return ERROR_PLD_FILE_LOAD_FAILED;
  53         }
  54
  55         if ((read_count = fread(length_buffer, 1, length_size, input_file)) != length_size)
  56         {
  57                 return ERROR_PLD_FILE_LOAD_FAILED;
  58         }
  59
  60         if (length_size == 4)
  61                 length = be_to_h_u32(length_buffer);
  62         else /* (length_size == 2) */
  63                 length = be_to_h_u16(length_buffer);
  64
  65         if (buffer_length)
  66                 *buffer_length = length;
  67
  68         *buffer = malloc(length);
  69
  70         if ((read_count = fread(*buffer, 1, length, input_file)) != length)
  71         {
  72                 return ERROR_PLD_FILE_LOAD_FAILED;
  73         }
  74
  75         return ERROR_OK;
  76 }
  77
  78 int xilinx_read_bit_file(struct xilinx_bit_file *bit_file, const char *filename)
  79 {
  80         FILE *input_file;
  81         struct stat input_stat;
  82         int read_count;
  83
  84         if (!filename || !bit_file)
  85                 return ERROR_INVALID_ARGUMENTS;
  86
  87         if (stat(filename, &input_stat) == -1)
  88         {
  89                 LOG_ERROR("couldn't stat() %s: %s", filename, strerror(errno));
  90                 return ERROR_PLD_FILE_LOAD_FAILED;
  91         }
  92
  93         if (S_ISDIR(input_stat.st_mode))
  94         {
  95                 LOG_ERROR("%s is a directory", filename);
  96                 return ERROR_PLD_FILE_LOAD_FAILED;
  97         }
  98
  99         if (input_stat.st_size == 0) {
 100                 LOG_ERROR("Empty file %s", filename);
 101                 return ERROR_PLD_FILE_LOAD_FAILED;
 102         }
 103
 104         if (!(input_file = fopen(filename, "rb")))
 105         {
 106                 LOG_ERROR("couldn't open %s: %s", filename, strerror(errno));
 107                 return ERROR_PLD_FILE_LOAD_FAILED;
 108         }
 109
 110         if ((read_count = fread(bit_file->unknown_header, 1, 13, input_file)) != 13)
 111         {
 112                 LOG_ERROR("couldn't read unknown_header from file '%s'", filename);
 113                 return ERROR_PLD_FILE_LOAD_FAILED;
 114         }
 115
 116         if (read_section(input_file, 2, 'a', NULL, &bit_file->source_file) != ERROR_OK)
 117                 return ERROR_PLD_FILE_LOAD_FAILED;
 118
 119         if (read_section(input_file, 2, 'b', NULL, &bit_file->part_name) != ERROR_OK)
 120                 return ERROR_PLD_FILE_LOAD_FAILED;
 121
 122         if (read_section(input_file, 2, 'c', NULL, &bit_file->date) != ERROR_OK)
 123                 return ERROR_PLD_FILE_LOAD_FAILED;
 124
 125         if (read_section(input_file, 2, 'd', NULL, &bit_file->time) != ERROR_OK)
 126                 return ERROR_PLD_FILE_LOAD_FAILED;
 127
 128         if (read_section(input_file, 4, 'e', &bit_file->length, &bit_file->data) != ERROR_OK)
 129                 return ERROR_PLD_FILE_LOAD_FAILED;
 130
 131         LOG_DEBUG("bit_file: %s %s %s,%s %" PRIi32 "", bit_file->source_file, bit_file->part_name,
 132                 bit_file->date, bit_file->time, bit_file->length);
 133
 134         fclose(input_file);
 135
 136         return ERROR_OK;
 137 }