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  *   51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.           *
  19  ***************************************************************************/
  20
  21 #ifdef HAVE_CONFIG_H
  22 #include "config.h"
  23 #endif
  24
  25 #include "xilinx_bit.h"
  26 #include "pld.h"
  27 #include <helper/log.h>
  28
  29 #include <sys/stat.h>
  30
  31
  32 static int read_section(FILE *input_file, int length_size, char section,
  33         uint32_t *buffer_length, uint8_t **buffer)
  34 {
  35         uint8_t length_buffer[4];
  36         int length;
  37         char section_char;
  38         int read_count;
  39
  40         if ((length_size != 2) && (length_size != 4)) {
  41                 LOG_ERROR("BUG: length_size neither 2 nor 4");
  42                 return ERROR_PLD_FILE_LOAD_FAILED;
  43         }
  44
  45         read_count = fread(&section_char, 1, 1, input_file);
  46         if (read_count != 1)
  47                 return ERROR_PLD_FILE_LOAD_FAILED;
  48
  49         if (section_char != section)
  50                 return ERROR_PLD_FILE_LOAD_FAILED;
  51
  52         read_count = fread(length_buffer, 1, length_size, input_file);
  53         if (read_count != length_size)
  54                 return ERROR_PLD_FILE_LOAD_FAILED;
  55
  56         if (length_size == 4)
  57                 length = be_to_h_u32(length_buffer);
  58         else    /* (length_size == 2) */
  59                 length = be_to_h_u16(length_buffer);
  60
  61         if (buffer_length)
  62                 *buffer_length = length;
  63
  64         *buffer = malloc(length);
  65
  66         read_count = fread(*buffer, 1, length, input_file);
  67         if (read_count != length)
  68                 return ERROR_PLD_FILE_LOAD_FAILED;
  69
  70         return ERROR_OK;
  71 }
  72
  73 int xilinx_read_bit_file(struct xilinx_bit_file *bit_file, const char *filename)
  74 {
  75         FILE *input_file;
  76         struct stat input_stat;
  77         int read_count;
  78
  79         if (!filename || !bit_file)
  80                 return ERROR_COMMAND_SYNTAX_ERROR;
  81
  82         if (stat(filename, &input_stat) == -1) {
  83                 LOG_ERROR("couldn't stat() %s: %s", filename, strerror(errno));
  84                 return ERROR_PLD_FILE_LOAD_FAILED;
  85         }
  86
  87         if (S_ISDIR(input_stat.st_mode)) {
  88                 LOG_ERROR("%s is a directory", filename);
  89                 return ERROR_PLD_FILE_LOAD_FAILED;
  90         }
  91
  92         if (input_stat.st_size == 0) {
  93                 LOG_ERROR("Empty file %s", filename);
  94                 return ERROR_PLD_FILE_LOAD_FAILED;
  95         }
  96
  97         input_file = fopen(filename, "rb");
  98         if (input_file == NULL) {
  99                 LOG_ERROR("couldn't open %s: %s", filename, strerror(errno));
 100                 return ERROR_PLD_FILE_LOAD_FAILED;
 101         }
 102
 103         read_count = fread(bit_file->unknown_header, 1, 13, input_file);
 104         if (read_count != 13) {
 105                 LOG_ERROR("couldn't read unknown_header from file '%s'", filename);
 106                 return ERROR_PLD_FILE_LOAD_FAILED;
 107         }
 108
 109         if (read_section(input_file, 2, 'a', NULL, &bit_file->source_file) != ERROR_OK)
 110                 return ERROR_PLD_FILE_LOAD_FAILED;
 111
 112         if (read_section(input_file, 2, 'b', NULL, &bit_file->part_name) != ERROR_OK)
 113                 return ERROR_PLD_FILE_LOAD_FAILED;
 114
 115         if (read_section(input_file, 2, 'c', NULL, &bit_file->date) != ERROR_OK)
 116                 return ERROR_PLD_FILE_LOAD_FAILED;
 117
 118         if (read_section(input_file, 2, 'd', NULL, &bit_file->time) != ERROR_OK)
 119                 return ERROR_PLD_FILE_LOAD_FAILED;
 120
 121         if (read_section(input_file, 4, 'e', &bit_file->length, &bit_file->data) != ERROR_OK)
 122                 return ERROR_PLD_FILE_LOAD_FAILED;
 123
 124         LOG_DEBUG("bit_file: %s %s %s,%s %" PRIi32 "", bit_file->source_file, bit_file->part_name,
 125                 bit_file->date, bit_file->time, bit_file->length);
 126
 127         fclose(input_file);
 128
 129         return ERROR_OK;
 130 }