FreeCalypso > hg > freecalypso-tools
annotate loadtools/flamdsec.c @ 977:511e2b85c115
fc-loadtool: implement flash lock-state command
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Fri, 01 Dec 2023 07:51:01 +0000 |
parents | |
children | c5133c3c11b1 |
rev | line source |
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977
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fc-loadtool: implement flash lock-state command
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1 /* |
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2 * This module is a place to implement commands that are specific to |
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3 * security features (OTP, sector locking) of AMD-style flash chips. |
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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 <stdint.h> |
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9 #include <stdlib.h> |
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10 #include "flash.h" |
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11 |
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12 extern struct flash_bank_info flash_bank_info[2]; |
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13 |
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14 static |
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15 issue_read_id(base_addr) |
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16 uint32_t base_addr; |
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17 { |
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18 if (do_w16(base_addr + 0xAAA, 0xAA)) { |
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19 bad_w16: fprintf(stderr, |
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20 "unexpected response to w16 in read ID cmd sequence - aborting\n"); |
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21 return(-1); |
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22 } |
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23 if (do_w16(base_addr + 0x554, 0x55)) |
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24 goto bad_w16; |
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25 if (do_w16(base_addr + 0xAAA, 0x90)) |
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26 goto bad_w16; |
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27 return(0); |
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28 } |
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29 |
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30 static |
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31 issue_reset_cmd(base_addr) |
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32 uint32_t base_addr; |
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33 { |
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34 if (do_w16(base_addr + 0xAAA, 0xF0)) { |
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35 fprintf(stderr, |
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36 "unexpected response to w16 when resetting flash to read mode!\n"); |
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37 return(-1); |
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38 } |
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39 return(0); |
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40 } |
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41 |
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42 static |
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43 read_mode_lock_word(base_addr, word_offset, retp) |
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44 uint32_t base_addr, word_offset; |
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45 uint16_t *retp; |
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46 { |
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47 if (do_w16(base_addr + 0xAAA, 0xAA)) { |
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48 bad_w16: fprintf(stderr, |
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49 "unexpected response to w16 in mode lock query sequence - aborting\n"); |
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50 return(-1); |
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51 } |
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52 if (do_w16(base_addr + 0x554, 0x55)) |
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53 goto bad_w16; |
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54 if (do_w16(base_addr + 0xAAA, 0x60)) |
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55 goto bad_w16; |
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56 if (do_w16(base_addr + word_offset, 0x48)) |
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57 goto bad_w16; |
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58 if (do_r16(base_addr + word_offset, retp) < 0) |
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59 return(-1); |
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60 return(0); |
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61 } |
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62 |
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63 static |
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64 pln_special_mode_entry(base_addr, mode_opc) |
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65 uint32_t base_addr; |
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66 uint16_t mode_opc; |
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67 { |
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68 if (do_w16(base_addr + 0xAAA, 0xAA)) { |
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69 bad_w16: fprintf(stderr, |
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70 "unexpected response to w16 in PL-N special mode entry sequence - aborting\n"); |
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71 return(-1); |
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72 } |
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73 if (do_w16(base_addr + 0x554, 0x55)) |
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74 goto bad_w16; |
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75 if (do_w16(base_addr + 0xAAA, mode_opc)) |
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76 goto bad_w16; |
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77 return(0); |
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78 } |
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79 |
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80 static |
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81 pln_special_mode_exit(base_addr) |
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82 uint32_t base_addr; |
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83 { |
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84 if (do_w16(base_addr, 0x90)) { |
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85 bad_w16: fprintf(stderr, |
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86 "unexpected response to w16 in PL-N special mode exit sequence - aborting\n"); |
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87 return(-1); |
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88 } |
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89 if (do_w16(base_addr, 0x00)) |
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90 goto bad_w16; |
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91 return(0); |
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92 } |
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93 |
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94 flashcmd_lock_state(argc, argv, bank) |
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95 char **argv; |
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96 { |
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97 struct flash_bank_info *bi; |
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98 struct amd_lock_info *li; |
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99 struct lock_group_desc *grp; |
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100 uint32_t offset, part_addr; |
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101 uint16_t word; |
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102 unsigned ng, nb; |
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103 |
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104 if (argc > 2) { |
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105 fprintf(stderr, "error: too many arguments\n"); |
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106 return(-1); |
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107 } |
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108 if (flash_detect(bank, 0) < 0) |
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109 return(-1); |
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110 bi = flash_bank_info + bank; |
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111 li = bi->amd_lock; |
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112 if (!li) { |
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113 fprintf(stderr, |
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114 "Operation not supported for this flash chip type\n"); |
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115 return(-1); |
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116 } |
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117 offset = 0; |
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118 for (ng = 0; ng < li->ngroups; ng++) { |
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119 grp = li->groups + ng; |
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120 if (grp->part_begin) { |
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121 part_addr = bi->base_addr + offset; |
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122 if (issue_read_id(part_addr) < 0) |
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123 return(-1); |
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124 } |
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125 if (offset == 0 && li->have_status_word_3) { |
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126 if (do_r16(bi->base_addr + 6, &word) < 0) |
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127 return(-1); |
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128 printf("Global status word 3: %04X\n", word); |
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129 } |
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130 if (offset == 0 && li->have_status_word_7) { |
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131 if (do_r16(bi->base_addr + 0xE, &word) < 0) |
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132 return(-1); |
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133 printf("Global status word 7: %04X\n", word); |
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134 } |
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135 for (nb = 0; nb < grp->nblocks; nb++) { |
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136 if (do_r16(bi->base_addr + offset + 4, &word) < 0) |
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137 return(-1); |
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138 printf("Sector%s at 0x%X: %s\n", |
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139 grp->is_group ? " group" : "", offset, |
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140 (word & 1) ? "locked" : "unlocked"); |
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141 offset += grp->block_size; |
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142 } |
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143 if (grp->part_end) { |
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144 if (issue_reset_cmd(part_addr) < 0) |
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145 return(-1); |
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146 } |
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147 } |
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148 if (li->have_mode_lock_bits) { |
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149 if (read_mode_lock_word(bi->base_addr, 0x14, &word) < 0) |
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150 return(-1); |
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151 printf("Password Protection Mode lock: %04X\n", word); |
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152 if (issue_reset_cmd(bi->base_addr) < 0) |
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153 return(-1); |
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154 if (read_mode_lock_word(bi->base_addr, 0x24, &word) < 0) |
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155 return(-1); |
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156 printf("Persistent Protection Mode lock: %04X\n", word); |
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157 if (issue_reset_cmd(bi->base_addr) < 0) |
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158 return(-1); |
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159 } |
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160 if (li->have_pln_lock_reg) { |
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161 if (pln_special_mode_entry(bi->base_addr, 0x40) < 0) |
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162 return(-1); |
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163 if (do_r16(bi->base_addr, &word) < 0) |
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164 return(-1); |
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165 printf("PL-N Lock Register: %04X\n", word); |
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166 if (pln_special_mode_exit(bi->base_addr) < 0) |
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167 return(-1); |
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168 } |
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169 return(0); |
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170 } |