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annotate ffstools/tiffs-rd/decode.c @ 733:bed7981ac8ca

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doc/Compal-FFS: update for IMEI found in OTP cells
author Mychaela Falconia <falcon@freecalypso.org>
date Fri, 28 Aug 2020 15:58:46 +0000
parents ed983d4040a8
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 /*
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2 * This C module implements the decode command, displaying certain
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3 * FFS files in a developer-friendly decoded form.
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4 */
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5
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6 #include <sys/types.h>
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7 #include <stdio.h>
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8 #include <stdlib.h>
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9 #include <string.h>
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10 #include <strings.h>
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11 #include <unistd.h>
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12 #include "types.h"
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13 #include "struct.h"
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14 #include "globals.h"
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15 #include "pathname.h"
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16
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17 extern void write_afcdac_ascii();
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18 extern void write_stdmap_ascii();
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19 extern void write_adccal_table();
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20 extern void write_afcparams_table();
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21 extern void write_tx_ramps_table();
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22 extern void write_tx_levels_table();
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23 extern void write_tx_calchan_table();
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24 extern void write_tx_caltemp_table();
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25 extern void write_rx_calchan_table();
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26 extern void write_rx_caltemp_table();
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27 extern void write_rx_agcparams_table();
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28
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29 static void
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30 pcm_IMEI_decode(bin, outf)
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31 u8 *bin;
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32 FILE *outf;
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33 {
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34 u8 rev[8];
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35 unsigned n;
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36
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37 for (n = 0; n < 8; n++)
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38 rev[n] = ((bin[n] & 0xF0) >> 4) | ((bin[n] & 0x0F) << 4);
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39 fprintf(outf, "%02X%02X%02X%02X-%02X%02X%02X-%02X\n", rev[0], rev[1],
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40 rev[2], rev[3], rev[4], rev[5], rev[6], rev[7]);
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41 }
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42
726
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43 static struct map {
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44 char *req_name;
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45 char *pathname;
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46 int need_band;
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47 unsigned size;
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48 void (*decode_func)();
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49 } map_table[] = {
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50 {"adccal", "/sys/adccal", 0, 36, write_adccal_table},
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51 {"afcdac", "/gsm/rf/afcdac", 0, 2, write_afcdac_ascii},
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52 {"afcparams", "/gsm/rf/afcparams", 0, 24, write_afcparams_table},
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53 {"stdmap", "/gsm/rf/stdmap", 0, 2, write_stdmap_ascii},
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54 {"tx-ramps", "/gsm/rf/tx/ramps.%s", 1, 512, write_tx_ramps_table},
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55 {"tx-levels", "/gsm/rf/tx/levels.%s", 1, 128, write_tx_levels_table},
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56 {"tx-calchan", "/gsm/rf/tx/calchan.%s", 1, 128, write_tx_calchan_table},
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57 {"tx-caltemp", "/gsm/rf/tx/caltemp.%s", 1, 40, write_tx_caltemp_table},
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58 {"rx-calchan", "/gsm/rf/rx/calchan.%s", 1, 40, write_rx_calchan_table},
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59 {"rx-caltemp", "/gsm/rf/rx/caltemp.%s", 1, 44, write_rx_caltemp_table},
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60 {"rx-agcparams", "/gsm/rf/rx/agcparams.%s", 1, 8, write_rx_agcparams_table},
727
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61 {"pcm-IMEI", "/pcm/IMEI", 0, 8, pcm_IMEI_decode},
726
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62 {0, 0, 0, 0, 0}
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63 };
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64
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65 static u8 file_read_buf[512];
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66 static unsigned file_expected_size;
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67 static unsigned file_read_ptr;
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68
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69 static void
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70 read_chunk(ch)
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71 struct chunkinfo *ch;
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72 {
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73 if (!ch->len)
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74 return;
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75 if (file_read_ptr + ch->len > file_expected_size) {
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76 fprintf(stderr, "error: FFS file is longer than expected\n");
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77 exit(1);
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78 }
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79 bcopy(ch->start, file_read_buf + file_read_ptr, ch->len);
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80 file_read_ptr += ch->len;
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81 }
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82
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83 static void
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84 segment_read_callback(inf, opaque)
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85 struct inode_info *inf;
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86 u_long opaque;
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87 {
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88 struct chunkinfo chi;
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89
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90 size_extra_chunk(inf, &chi);
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91 read_chunk(&chi);
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92 }
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93
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94 cmd_decode(argc, argv)
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95 char **argv;
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96 {
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97 struct map *map;
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98 char pathname[PATHNAME_BUF_SIZE];
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99 int headino;
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100 struct inode_info *inf;
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101 struct chunkinfo chi;
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102
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103 if (argc < 2) {
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104 usage: fprintf(stderr, "usage: decode file-keyword [band]\n");
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105 exit(1);
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106 }
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107 for (map = map_table; map->req_name; map++)
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108 if (!strcmp(map->req_name, argv[1]))
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109 break;
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110 if (!map->req_name) {
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111 fprintf(stderr, "error: file keyword \"%s\" not known\n",
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112 argv[1]);
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113 exit(1);
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114 }
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115 if (map->need_band) {
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116 if (argc < 3) {
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117 fprintf(stderr,
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118 "error: band not specified for %s table\n",
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119 map->req_name);
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120 exit(1);
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121 }
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122 if (argc > 3)
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123 goto usage;
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124 if (strlen(argv[2]) > 7) {
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125 fprintf(stderr,
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126 "error: band name argument is too long\n");
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127 exit(1);
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128 }
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129 sprintf(pathname, map->pathname, argv[2]);
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130 } else {
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131 if (argc > 2)
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132 goto usage;
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133 strcpy(pathname, map->pathname);
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134 }
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135 file_expected_size = map->size;
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136
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137 read_ffs_image();
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138 find_inode_block();
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139 alloc_inode_table();
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140 find_root_inode();
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141
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142 headino = find_pathname(pathname);
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143 inf = inode_info[headino];
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144 if (inf->type != 0xF1) {
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145 fprintf(stderr, "error: FFS object is not a regular file\n");
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146 exit(1);
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147 }
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148 size_head_chunk(inf, &chi);
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149 read_chunk(&chi);
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150 iterate_seg_file(headino, segment_read_callback, 0L, 0, 0);
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151 if (file_read_ptr < file_expected_size) {
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152 fprintf(stderr, "error: FFS file is shorter than expected\n");
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153 exit(1);
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154 }
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155 map->decode_func(file_read_buf, stdout);
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156 exit(0);
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157 }