FreeCalypso > hg > fc-usbser-tools

annotate fteeprom/ftee-decode.c @ 91:f4a7ac90cf39

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cp2102-decode-ee-desc: decode textual ID strings
author Mychaela Falconia <falcon@freecalypso.org>
date Wed, 27 Sep 2023 20:46:30 +0000
parents 225dc1d9f2f1
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
65
225dc1d9f2f1 ftee-decode program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1 /*
225dc1d9f2f1 ftee-decode program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
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2 * This program reads an FTDI EEPROM image from a file (or from stdin)
225dc1d9f2f1 ftee-decode program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
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3 * and performs some basic decoding on it. Only the part of the EEPROM
225dc1d9f2f1 ftee-decode program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
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4 * structure that is common for all chips is looked at, and only very
225dc1d9f2f1 ftee-decode program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
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5 * shallow decoding is performed, without differentiating by FTDI chip
225dc1d9f2f1 ftee-decode program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
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6 * type. Compared to simply studying EEPROM images in raw hex, the main
225dc1d9f2f1 ftee-decode program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
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7 * utility of this program is decoding and displaying the three textual
225dc1d9f2f1 ftee-decode program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
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8 * ID strings.
225dc1d9f2f1 ftee-decode program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
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9 */
225dc1d9f2f1 ftee-decode program written, compiles
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10
225dc1d9f2f1 ftee-decode program written, compiles
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11 #include <sys/types.h>
225dc1d9f2f1 ftee-decode program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
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12 #include <string.h>
225dc1d9f2f1 ftee-decode program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
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13 #include <strings.h>
225dc1d9f2f1 ftee-decode program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
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14 #include <stdio.h>
225dc1d9f2f1 ftee-decode program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
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15 #include <stdlib.h>
225dc1d9f2f1 ftee-decode program written, compiles
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16
225dc1d9f2f1 ftee-decode program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
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17 extern unsigned eeprom_size;
225dc1d9f2f1 ftee-decode program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
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18 extern u_short eeprom[256];
225dc1d9f2f1 ftee-decode program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
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19
225dc1d9f2f1 ftee-decode program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
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20 static unsigned useful_size;
225dc1d9f2f1 ftee-decode program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
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21
225dc1d9f2f1 ftee-decode program written, compiles
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22 static int
225dc1d9f2f1 ftee-decode program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
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23 verify_eeprom_chksum()
225dc1d9f2f1 ftee-decode program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
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24 {
225dc1d9f2f1 ftee-decode program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
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25 u_short chksum = 0xAAAA;
225dc1d9f2f1 ftee-decode program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
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26 unsigned n;
225dc1d9f2f1 ftee-decode program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
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27
225dc1d9f2f1 ftee-decode program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
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28 for (n = 0; n < useful_size; n++) {
225dc1d9f2f1 ftee-decode program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
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29 chksum ^= eeprom[n];
225dc1d9f2f1 ftee-decode program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
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30 chksum = (chksum << 1) | (chksum >> 15);
225dc1d9f2f1 ftee-decode program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
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31 }
225dc1d9f2f1 ftee-decode program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
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32 return (chksum == 0);
225dc1d9f2f1 ftee-decode program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
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33 }
225dc1d9f2f1 ftee-decode program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
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34
225dc1d9f2f1 ftee-decode program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
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35 static void
225dc1d9f2f1 ftee-decode program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
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36 show_string_desc(headline, ptr_word)
225dc1d9f2f1 ftee-decode program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
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37 char *headline;
225dc1d9f2f1 ftee-decode program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
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38 unsigned ptr_word;
225dc1d9f2f1 ftee-decode program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
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39 {
225dc1d9f2f1 ftee-decode program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
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40 unsigned start_byte, desc_len;
225dc1d9f2f1 ftee-decode program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
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41 unsigned start_word, total_words;
225dc1d9f2f1 ftee-decode program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
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42 unsigned head_word, nchars;
225dc1d9f2f1 ftee-decode program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
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43 u_short *sp;
225dc1d9f2f1 ftee-decode program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
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44 unsigned n, uni;
225dc1d9f2f1 ftee-decode program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
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45
225dc1d9f2f1 ftee-decode program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
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46 if (!ptr_word) {
225dc1d9f2f1 ftee-decode program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
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47 printf("%s NULL\n", headline);
225dc1d9f2f1 ftee-decode program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
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48 return;
225dc1d9f2f1 ftee-decode program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
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49 }
225dc1d9f2f1 ftee-decode program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
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50 if (ptr_word & 0x0101) {
225dc1d9f2f1 ftee-decode program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
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51 inv: printf("%s INVALID\n", headline);
225dc1d9f2f1 ftee-decode program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
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52 return;
225dc1d9f2f1 ftee-decode program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
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53 }
225dc1d9f2f1 ftee-decode program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
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54 start_byte = ptr_word & 0xFF;
225dc1d9f2f1 ftee-decode program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
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55 desc_len = ptr_word >> 8;
225dc1d9f2f1 ftee-decode program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
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56 if (useful_size == 64)
225dc1d9f2f1 ftee-decode program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
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57 start_byte &= 0x7F;
225dc1d9f2f1 ftee-decode program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
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58 start_word = start_byte >> 1;
225dc1d9f2f1 ftee-decode program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
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59 total_words = desc_len >> 1;
225dc1d9f2f1 ftee-decode program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
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60 if (start_word < 10)
225dc1d9f2f1 ftee-decode program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
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61 goto inv;
225dc1d9f2f1 ftee-decode program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
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62 if (total_words < 1)
225dc1d9f2f1 ftee-decode program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
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63 goto inv;
225dc1d9f2f1 ftee-decode program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
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64 if (start_word + total_words >= useful_size)
225dc1d9f2f1 ftee-decode program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
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65 goto inv;
225dc1d9f2f1 ftee-decode program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
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66 head_word = eeprom[start_word];
225dc1d9f2f1 ftee-decode program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
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67 if ((head_word & 0xFF) != desc_len)
225dc1d9f2f1 ftee-decode program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
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68 goto inv;
225dc1d9f2f1 ftee-decode program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
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69 if ((head_word >> 8) != 0x03)
225dc1d9f2f1 ftee-decode program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
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70 goto inv;
225dc1d9f2f1 ftee-decode program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
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71 nchars = total_words - 1;
225dc1d9f2f1 ftee-decode program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
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72 printf("%s \"", headline);
225dc1d9f2f1 ftee-decode program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
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73 sp = eeprom + start_word + 1;
225dc1d9f2f1 ftee-decode program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
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74 for (n = 0; n < nchars; n++) {
225dc1d9f2f1 ftee-decode program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
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75 uni = *sp++;
225dc1d9f2f1 ftee-decode program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
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76 if (uni < 0x20 || uni > 0x7E) {
225dc1d9f2f1 ftee-decode program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
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77 printf("\\u%04X", uni);
225dc1d9f2f1 ftee-decode program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
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78 continue;
225dc1d9f2f1 ftee-decode program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
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79 }
225dc1d9f2f1 ftee-decode program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
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80 if (uni == '"' || uni == '\\')
225dc1d9f2f1 ftee-decode program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
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81 putchar('\\');
225dc1d9f2f1 ftee-decode program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
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82 putchar(uni);
225dc1d9f2f1 ftee-decode program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
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83 }
225dc1d9f2f1 ftee-decode program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
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84 putchar('"');
225dc1d9f2f1 ftee-decode program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
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85 putchar('\n');
225dc1d9f2f1 ftee-decode program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
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86 }
225dc1d9f2f1 ftee-decode program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
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87
225dc1d9f2f1 ftee-decode program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
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88 main(argc, argv)
225dc1d9f2f1 ftee-decode program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
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89 char **argv;
225dc1d9f2f1 ftee-decode program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
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90 {
225dc1d9f2f1 ftee-decode program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
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91 if (argc != 2) {
225dc1d9f2f1 ftee-decode program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
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92 fprintf(stderr, "usage: %s eeprom-image-file\n", argv[0]);
225dc1d9f2f1 ftee-decode program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
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93 exit(1);
225dc1d9f2f1 ftee-decode program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
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94 }
225dc1d9f2f1 ftee-decode program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
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95 if (strcmp(argv[1], "-"))
225dc1d9f2f1 ftee-decode program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
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96 read_eeprom_from_file(argv[1]);
225dc1d9f2f1 ftee-decode program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
97 else
225dc1d9f2f1 ftee-decode program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
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98 read_eeprom_from_stdin();
225dc1d9f2f1 ftee-decode program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
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99 switch (eeprom_size) {
225dc1d9f2f1 ftee-decode program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
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100 case 64:
225dc1d9f2f1 ftee-decode program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
101 printf("EEPROM size: 128 bytes (93C46 or FT232R)\n");
225dc1d9f2f1 ftee-decode program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
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102 useful_size = 64;
225dc1d9f2f1 ftee-decode program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
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103 break;
225dc1d9f2f1 ftee-decode program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
104 case 128:
225dc1d9f2f1 ftee-decode program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
105 printf("EEPROM size: 256 bytes (93C56)\n");
225dc1d9f2f1 ftee-decode program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
106 useful_size = 128;
225dc1d9f2f1 ftee-decode program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
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107 break;
225dc1d9f2f1 ftee-decode program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
108 case 256:
225dc1d9f2f1 ftee-decode program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
109 printf("EEPROM size: 512 bytes (93C66)\n");
225dc1d9f2f1 ftee-decode program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
110 useful_size = 128;
225dc1d9f2f1 ftee-decode program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
111 break;
225dc1d9f2f1 ftee-decode program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
112 default:
225dc1d9f2f1 ftee-decode program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
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113 fprintf(stderr,
225dc1d9f2f1 ftee-decode program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
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114 "BUG: invalid EEPROM size not caught earlier\n");
225dc1d9f2f1 ftee-decode program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
115 exit(1);
225dc1d9f2f1 ftee-decode program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
116 }
225dc1d9f2f1 ftee-decode program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
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117 printf("EEPROM checksum is %s\n",
225dc1d9f2f1 ftee-decode program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
118 verify_eeprom_chksum() ? "good" : "BAD!");
225dc1d9f2f1 ftee-decode program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
119 printf("FTDI byte 00: 0x%02X\n", eeprom[0] & 0xFF);
225dc1d9f2f1 ftee-decode program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
120 printf("FTDI byte 01: 0x%02X\n", eeprom[0] >> 8);
225dc1d9f2f1 ftee-decode program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
121 printf("idVendor: 0x%04X\n", eeprom[1]);
225dc1d9f2f1 ftee-decode program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
122 printf("idProduct: 0x%04X\n", eeprom[2]);
225dc1d9f2f1 ftee-decode program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
123 printf("bcdDevice: 0x%04X\n", eeprom[3]);
225dc1d9f2f1 ftee-decode program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
124 printf("bmAttributes: 0x%02X\n", eeprom[4] & 0xFF);
225dc1d9f2f1 ftee-decode program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
125 printf("bMaxPower: %u mA\n", (eeprom[4] >> 8) * 2);
225dc1d9f2f1 ftee-decode program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
126 printf("FTDI byte 0A: 0x%02X\n", eeprom[5] & 0xFF);
225dc1d9f2f1 ftee-decode program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
127 printf("FTDI byte 0B: 0x%02X\n", eeprom[5] >> 8);
225dc1d9f2f1 ftee-decode program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
128 printf("bcdUSB word: 0x%04X\n", eeprom[6]);
225dc1d9f2f1 ftee-decode program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
129 show_string_desc("Manuf string: ", eeprom[7]);
225dc1d9f2f1 ftee-decode program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
130 show_string_desc("Product string:", eeprom[8]);
225dc1d9f2f1 ftee-decode program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
131 show_string_desc("Serial# string:", eeprom[9]);
225dc1d9f2f1 ftee-decode program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
132 exit(0);
225dc1d9f2f1 ftee-decode program written, compiles
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
133 }