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annotate gsm-fw/comlib/cl_imei.c @ 700:2913c4fdd34a

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top level README: describe the project at a higher level
author Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
date Thu, 02 Oct 2014 00:06:50 +0000
parents b34e5351438e
children f3fba126778a
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1 /*
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2 +-----------------------------------------------------------------------------
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3 | Project : COMLIB
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4 | Modul : cl_imei.c
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5 +-----------------------------------------------------------------------------
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6 | Copyright 2002 Texas Instruments Berlin, AG
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7 | All rights reserved.
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8 |
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9 | This file is confidential and a trade secret of Texas
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10 | Instruments Berlin, AG
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11 | The receipt of or possession of this file does not convey
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12 | any rights to reproduce or disclose its contents or to
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13 | manufacture, use, or sell anything it may describe, in
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14 | whole, or in part, without the specific written consent of
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15 | Texas Instruments Berlin, AG.
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16 +-----------------------------------------------------------------------------
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17 | Purpose : Definitions of common library functions: IMEI decryption with
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18 DES algorithm
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19 +-----------------------------------------------------------------------------
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20 */
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21 /*
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22 * Version 1.0
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23 */
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24
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25 /**********************************************************************************/
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26
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27 /*
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28 NOTE:
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29 */
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30
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31 /**********************************************************************************/
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32
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33 #ifndef CL_IMEI_C
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34 #define CL_IMEI_C
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35
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36 #include "config.h"
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37 #include "fixedconf.h"
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38
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39 #include "typedefs.h"
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40 #include "vsi.h" /* to get a lot of macros */
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41
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42 #include "../services/ffs/ffs.h"
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43 #include "../bsp/mem.h"
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44 #include "pcm.h"
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45
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46 #include "cl_imei.h"
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47 #include "cl_des.h"
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48 #include <string.h>
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49
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50 static UBYTE stored_imei[CL_IMEI_SIZE]; /* when the imei is read once, the value
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51 is stored in this buffer */
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52 static UBYTE imei_flag = 0; /* this flag indicates, if IMEI was successful read
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53 and is stored in the stored_imei buffer */
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54
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55 /* Default IMEISV for D-Sample 00440000-350-111-20 */
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56 const UBYTE C_DEFAULT_IMEISV_DSAMPLE[CL_IMEI_SIZE] =
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57 {0x00, 0x44, 0x00, 0x00, 0x35, 0x01, 0x11, 0x20};
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58 #define CL_IMEI_FFS_PATH "/etc/IMEISV"
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59
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60 /*==== FUNCTIONS ==================================================*/
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61
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62 #if CONFIG_TARGET_PIRELLI
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63 /*
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64 +------------------------------------------------------------------------------
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65 | Function : get_dieID
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66 +------------------------------------------------------------------------------
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67 | Description : the function reads the Die-ID from base band processor and
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68 | extracts it from 4 BYTEs to 8 BYTEs.
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69 |
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70 | Parameters : inBufSize - size of buffer where to store Die ID, min.8 BYTE
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71 | *outBufPtr - pointer to buffer where to store the Die ID
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72 | Return : void
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73 +------------------------------------------------------------------------------
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74 */
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75 LOCAL void get_dieID(USHORT inBufSize, UBYTE *outBufPtr)
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76 {
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77 int i;
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78 USHORT *outBuf16 = (USHORT*)&outBufPtr[0];
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79 volatile USHORT *reg_p = (USHORT *) CL_IMEI_DIE_ID_REG;
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80
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81 TRACE_FUNCTION("get_dieID()");
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82
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83 if(inBufSize < CL_IMEI_DIE_ID_SIZE){
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84 TRACE_ERROR("CL IMEI ERROR: buffer size for Die ID to short!");
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85 }
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86 #ifdef IMEI_DEBUG
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87 TRACE_EVENT_P1("CL IMEI INFO: Die-ID address(0x%x)", CL_IMEI_DIE_ID_REG);
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88 #endif
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89 for (i = 0; i < CL_IMEI_DIE_ID_SIZE; i++) {
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90 /* Die ID is 4 BYTE long, extract it to 8 BYTE. */
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91 outBuf16[i] = (USHORT)(*(UINT8*)(reg_p)++);
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92 }
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93 }
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94
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95 #if 0 // function for reading from Pirelli's factory block not written yet
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96 /*
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97 +------------------------------------------------------------------------------
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98 | Function : pirelli_get_imeisv
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99 +------------------------------------------------------------------------------
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100 | Description : This function attempts to read and decrypt a valid IMEISV
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101 | record from Pirelli's factory data block.
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102 |
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103 | Parameters : inBufSize - size of buffer where to store IMEI, min. 8 BYTE
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104 | *outBufPtr - pointer to buffer where to store the IMEI
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105 | Return : 0 - OK
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106 | <0 - ERROR
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107 +------------------------------------------------------------------------------
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108 */
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109 LOCAL BYTE pirelli_get_imeisv (USHORT inBufSize, UBYTE *outBufPtr)
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110 {
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111 UBYTE isdid_buf[CL_IMEI_ISDID_SIZE];
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112 UBYTE r_dieId[CL_DES_KEY_SIZE]; /* read Die ID */
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113 UBYTE d_dieId[CL_DES_KEY_SIZE]; /* deciphered Die ID */
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114 SHORT ret;
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115
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116 TRACE_FUNCTION("pirelli_get_imeisv()");
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117
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118 if(inBufSize < CL_IMEI_SIZE){
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119 TRACE_ERROR("CL IMEI ERROR: buffer size for IMEI to short!");
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120 return CL_IMEI_ERROR;
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121 }
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122
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123 /*
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124 * Read ISDID(enciphered IMEISV+DieID) from FFS.
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125 * TODO: change the code to read from Pirelli's factory data block instead
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126 */
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127 if((ret = ffs_file_read(CL_IMEI_FFS_PATH, isdid_buf, CL_IMEI_ISDID_SIZE)) >= EFFS_OK)
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128 {
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129 /*
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130 * Read Die ID for using as DES key
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131 */
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132 get_dieID(CL_DES_KEY_SIZE, r_dieId);
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133 /*
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134 * Call DES algorithm routine
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135 */
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136 /* decipher first 8 BYTEs */
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137 cl_des(&isdid_buf[0], r_dieId, outBufPtr, CL_DES_DECRYPTION);
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138 /* decipher the rest 8 BYTEs */
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139 cl_des(&isdid_buf[CL_DES_BUFFER_SIZE], r_dieId, d_dieId, CL_DES_DECRYPTION);
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140 if(!memcmp(d_dieId, r_dieId, CL_DES_KEY_SIZE))
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141 {
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142 /* Die ID is valid */
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143 ret = CL_IMEI_OK;
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144 } else {/* Die ID is corrupted */
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145 char pr_buf[126];
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146 TRACE_ERROR("CL IMEI ERROR: Die ID is corrupted");
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147 sprintf(pr_buf,"Read DieID: %02x %02x %02x %02x %02x %02x %02x %02x",
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148 r_dieId[0], r_dieId[1], r_dieId[2], r_dieId[3],
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149 r_dieId[4], r_dieId[5], r_dieId[6], r_dieId[7]);
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150 TRACE_ERROR(pr_buf);
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151 sprintf(pr_buf,"Deciphered DieID: %02x %02x %02x %02x %02x %02x %02x %02x",
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152 d_dieId[0], d_dieId[1], d_dieId[2], d_dieId[3],
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153 d_dieId[4], d_dieId[5], d_dieId[6], d_dieId[7]);
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154 TRACE_ERROR(pr_buf);
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155
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156 ret = CL_IMEI_INVALID_DIE_ID;
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157 }
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158 } else {
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159 ret = CL_IMEI_READ_IMEI_FAILED;
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160 }
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161
667
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162 return ret;
664
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163
667
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164 }/* pirelli_get_imeisv() */
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165 #endif /* #if 0 */
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166 #endif /* CONFIG_TARGET_PIRELLI */
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167
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168
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169 /*
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170 +------------------------------------------------------------------------------
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171 | Function : cl_get_imeisv
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172 +------------------------------------------------------------------------------
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173 | Description : Common IMEI getter function
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174 |
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175 | Parameters : imeiBufSize - size of buffer where to store IMEI, min 8 BYTEs
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176 | *imeiBufPtr - pointer to buffer where to store the IMEI
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177 | imeiType - indicates, if the IMEI should be read from
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178 | FFS/Secure ROM (value=CL_IMEI_GET_SECURE_IMEI) or
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179 | if the already read and stored IMEI (if available)
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180 | should be delivered (value=CL_IMEI_GET_STORED_IMEI)
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181 | The second option should be used only by ACI or
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182 | BMI to show the IMEISV on mobile's display or
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183 | in terminal window, e.g. if user calls *#06#.
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184 | For IMEI Control reason (used by ACI), the value
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185 | has to be CL_IMEI_CONTROL_IMEI
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186 | Return : OK - 0
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187 | ERROR - negative values
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188 +------------------------------------------------------------------------------
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189 */
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190 extern BYTE cl_get_imeisv(USHORT imeiBufSize, UBYTE *imeiBufPtr, UBYTE imeiType)
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191 {
667
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192 USHORT ret;
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193 #if CONFIG_MOKOFFS
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194 UBYTE version;
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195 UBYTE buf[SIZE_EF_IMEI];
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196 #endif
664
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197
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198 TRACE_FUNCTION("cl_get_imeisv()");
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199
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200 /*
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201 * The user has required a stored IMEI. If it has been already read
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202 * and stored, so return stored IMEI
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203 */
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204 if((imeiType == CL_IMEI_GET_STORED_IMEI) && (imei_flag == 1)){
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205 memcpy(imeiBufPtr, stored_imei, CL_IMEI_SIZE);
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206 return CL_IMEI_OK;
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207 }
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208 /*
667
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209 * The user has required a "secure" IMEI. How we get it depends on what
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210 * platform we are running on.
664
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211 */
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212
667
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diff changeset
213 #if CONFIG_MOKOFFS
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214 /*
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215 * Running on Openmoko GTA0x and using the original FFS.
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216 * Get the nibble-swapped IMEI record from PCM.
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217 */
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diff changeset
218 ret = pcm_ReadFile ((UBYTE *)EF_IMEI_ID, SIZE_EF_IMEI, buf, &version);
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219 if(ret == PCM_OK){
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diff changeset
220 TRACE_EVENT("CL IMEI INFO: return IMEI-SV number from ffs:/pcm/IMEI");
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221 /*
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222 * swap digits
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223 */
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diff changeset
224 imeiBufPtr[0] = ((buf[0] & 0xf0) >> 4) | ((buf[0] & 0x0f) << 4);
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diff changeset
225 imeiBufPtr[1] = ((buf[1] & 0xf0) >> 4) | ((buf[1] & 0x0f) << 4);
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226 imeiBufPtr[2] = ((buf[2] & 0xf0) >> 4) | ((buf[2] & 0x0f) << 4);
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diff changeset
227 imeiBufPtr[3] = ((buf[3] & 0xf0) >> 4) | ((buf[3] & 0x0f) << 4);
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diff changeset
228 imeiBufPtr[4] = ((buf[4] & 0xf0) >> 4) | ((buf[4] & 0x0f) << 4);
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229 imeiBufPtr[5] = ((buf[5] & 0xf0) >> 4) | ((buf[5] & 0x0f) << 4);
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diff changeset
230 imeiBufPtr[6] = ((buf[6] & 0xf0) >> 4) | ((buf[6] & 0x0f) << 4);
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diff changeset
231 imeiBufPtr[7] = ((buf[7] & 0xf0) >> 4) | ((buf[7] & 0x0f) << 4);
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diff changeset
232 /* store IMEI */
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diff changeset
233 memcpy(stored_imei, imeiBufPtr, CL_IMEI_SIZE);
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234 imei_flag = 1;
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diff changeset
235 }else{
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diff changeset
236 /*
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237 * pcm_ReadFile() can't really fail, as it merely reads out of a
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diff changeset
238 * RAM buffer that was filled earlier, either from FFS or from
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239 * compiled-in defaults. But TI's original code had the following
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240 * error handling clause, so I kept it.
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241 */
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diff changeset
242 TRACE_EVENT("CL IMEI INFO: return default IMEI-SV number");
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diff changeset
243 memcpy(imeiBufPtr, C_DEFAULT_IMEISV_DSAMPLE, CL_IMEI_SIZE);
664
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244 }
667
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245 return CL_IMEI_OK;
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246 #else
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247
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248 /*
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249 * Regular FreeCalypso configuration, not MokoFFS.
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250 * We try to get the IMEISV from the following sources, in this order:
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251 *
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252 * /etc/IMEISV (sensible nibble order, not encrypted)
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253 * Pirelli's encrypted IMEI record (Pirelli target only)
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254 * hard-coded fallback and error indication
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255 */
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256
667
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257 ret = ffs_file_read(CL_IMEI_FFS_PATH, imeiBufPtr, CL_IMEI_SIZE);
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258 if (ret >= EFFS_OK) {
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259 memcpy(stored_imei, imeiBufPtr, CL_IMEI_SIZE);
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260 imei_flag = 1;
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261 return CL_IMEI_OK;
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262 }
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263 ret = CL_IMEI_READ_IMEI_FAILED;
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264 #if CONFIG_TARGET_PIRELLI
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265 /* not yet implemented */
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266 #endif
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267 TRACE_ERROR("CL IMEI FATAL ERROR: IMEI not available!");
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268 memcpy(imeiBufPtr, C_DEFAULT_IMEISV_DSAMPLE, CL_IMEI_SIZE);
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269 return ret;
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270 #endif /* CONFIG_MOKOFFS */
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271 }
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272
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273 #endif /* CL_IMEI_C */