1 | /* |
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2 | * (C) Copyright 2002 |
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3 | * Sysgo Real-Time Solutions, GmbH <www.elinos.com> |
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4 | * Alex Zuepke <azu@sysgo.de> |
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5 | * |
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6 | * (C) Copyright 2005 |
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7 | * 2N Telekomunikace, a.s. <www.2n.cz> |
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8 | * Ladislav Michl <michl@2n.cz> |
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9 | * |
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10 | * See file CREDITS for list of people who contributed to this |
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11 | * project. |
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12 | * |
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13 | * This program is free software; you can redistribute it and/or |
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14 | * modify it under the terms of the GNU General Public License as |
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15 | * published by the Free Software Foundation; either version 2 of |
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16 | * the License, or (at your option) any later version. |
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17 | * |
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18 | * This program is distributed in the hope that it will be useful, |
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19 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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20 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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21 | * GNU General Public License for more details. |
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22 | * |
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23 | * You should have received a copy of the GNU General Public License |
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24 | * along with this program; if not, write to the Free Software |
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25 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, |
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26 | * MA 02111-1307 USA |
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27 | */ |
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28 | |
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29 | #include <common.h> |
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30 | |
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31 | /*#if 0 */ |
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32 | #if (PHYS_SDRAM_1_SIZE != SZ_32M) |
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33 | |
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34 | #include "crcek.h" |
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35 | |
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36 | #if (CFG_MAX_FLASH_BANKS > 1) |
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37 | #error There is always only _one_ flash chip |
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38 | #endif |
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39 | |
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40 | flash_info_t flash_info[CFG_MAX_FLASH_BANKS]; |
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41 | |
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42 | #define CMD_READ_ARRAY 0x000000f0 |
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43 | #define CMD_UNLOCK1 0x000000aa |
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44 | #define CMD_UNLOCK2 0x00000055 |
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45 | #define CMD_ERASE_SETUP 0x00000080 |
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46 | #define CMD_ERASE_CONFIRM 0x00000030 |
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47 | #define CMD_PROGRAM 0x000000a0 |
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48 | #define CMD_UNLOCK_BYPASS 0x00000020 |
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49 | |
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50 | #define MEM_FLASH_ADDR1 (*(volatile u16 *)(CFG_FLASH_BASE + (0x00000555 << 1))) |
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51 | #define MEM_FLASH_ADDR2 (*(volatile u16 *)(CFG_FLASH_BASE + (0x000002aa << 1))) |
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52 | |
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53 | #define BIT_ERASE_DONE 0x00000080 |
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54 | #define BIT_RDY_MASK 0x00000080 |
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55 | #define BIT_PROGRAM_ERROR 0x00000020 |
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56 | #define BIT_TIMEOUT 0x80000000 /* our flag */ |
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57 | |
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58 | /*----------------------------------------------------------------------- |
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59 | */ |
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60 | |
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61 | ulong flash_init(void) |
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62 | { |
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63 | int i; |
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64 | |
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65 | flash_info[0].flash_id = (AMD_MANUFACT & FLASH_VENDMASK) | |
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66 | (AMD_ID_LV800B & FLASH_TYPEMASK); |
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67 | flash_info[0].size = PHYS_FLASH_1_SIZE; |
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68 | flash_info[0].sector_count = CFG_MAX_FLASH_SECT; |
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69 | memset(flash_info[0].protect, 0, CFG_MAX_FLASH_SECT); |
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70 | |
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71 | for (i = 0; i < flash_info[0].sector_count; i++) { |
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72 | switch (i) { |
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73 | case 0: /* 16kB */ |
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74 | flash_info[0].start[0] = CFG_FLASH_BASE; |
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75 | break; |
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76 | case 1: /* 8kB */ |
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77 | flash_info[0].start[1] = CFG_FLASH_BASE + 0x4000; |
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78 | break; |
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79 | case 2: /* 8kB */ |
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80 | flash_info[0].start[2] = CFG_FLASH_BASE + 0x4000 + |
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81 | 0x2000; |
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82 | break; |
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83 | case 3: /* 32 KB */ |
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84 | flash_info[0].start[3] = CFG_FLASH_BASE + 0x4000 + |
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85 | 2 * 0x2000; |
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86 | break; |
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87 | case 4: |
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88 | flash_info[0].start[4] = CFG_FLASH_BASE + 0x4000 + |
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89 | 2 * 0x2000 + 0x8000; |
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90 | break; |
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91 | default: /* 64kB */ |
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92 | flash_info[0].start[i] = flash_info[0].start[i-1] + |
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93 | 0x10000; |
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94 | break; |
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95 | } |
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96 | } |
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97 | |
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98 | /* U-Boot */ |
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99 | flash_protect(FLAG_PROTECT_SET, |
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100 | LOADER1_OFFSET, |
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101 | LOADER1_OFFSET + LOADER_SIZE - 1, flash_info); |
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102 | /* Protect crcek, env and r_env as well */ |
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103 | flash_protect(FLAG_PROTECT_SET, 0, 0x8000 - 1, flash_info); |
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104 | |
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105 | return flash_info[0].size; |
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106 | } |
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107 | |
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108 | /*----------------------------------------------------------------------- |
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109 | */ |
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110 | void flash_print_info(flash_info_t *info) |
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111 | { |
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112 | int i; |
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113 | |
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114 | switch (info->flash_id & FLASH_VENDMASK) { |
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115 | case (AMD_MANUFACT & FLASH_VENDMASK): |
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116 | puts("AMD: "); |
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117 | break; |
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118 | default: |
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119 | puts("Unknown vendor "); |
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120 | break; |
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121 | } |
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122 | |
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123 | switch (info->flash_id & FLASH_TYPEMASK) { |
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124 | case (AMD_ID_LV800B & FLASH_TYPEMASK): |
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125 | puts("AM29LV800BB (8Mb)\n"); |
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126 | break; |
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127 | default: |
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128 | puts("Unknown chip type\n"); |
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129 | return; |
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130 | } |
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131 | |
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132 | printf(" Size: %ld MB in %d sectors\n", |
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133 | info->size >> 20, info->sector_count); |
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134 | |
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135 | puts(" Sector start addresses:"); |
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136 | for (i = 0; i < info->sector_count; i++) { |
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137 | if ((i % 5) == 0) |
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138 | puts("\n "); |
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139 | |
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140 | printf(" %08lX%s", info->start[i], |
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141 | info->protect[i] ? " (RO)" : " "); |
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142 | } |
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143 | puts("\n"); |
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144 | } |
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145 | |
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146 | /*----------------------------------------------------------------------- |
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147 | */ |
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148 | |
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149 | int flash_erase(flash_info_t *info, int s_first, int s_last) |
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150 | { |
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151 | ushort result; |
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152 | int prot, sect; |
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153 | int rc = ERR_OK; |
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154 | |
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155 | /* first look for protection bits */ |
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156 | |
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157 | if (info->flash_id == FLASH_UNKNOWN) |
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158 | return ERR_UNKNOWN_FLASH_TYPE; |
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159 | |
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160 | if ((s_first < 0) || (s_first > s_last)) |
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161 | return ERR_INVAL; |
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162 | |
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163 | if ((info->flash_id & FLASH_VENDMASK) != |
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164 | (AMD_MANUFACT & FLASH_VENDMASK)) |
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165 | return ERR_UNKNOWN_FLASH_VENDOR; |
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166 | |
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167 | prot = 0; |
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168 | for (sect = s_first; sect <= s_last; ++sect) |
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169 | if (info->protect[sect]) |
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170 | prot++; |
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171 | |
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172 | if (prot) |
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173 | printf("- Warning: %d protected sectors will not be erased!\n", |
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174 | prot); |
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175 | else |
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176 | putc('\n'); |
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177 | |
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178 | /* Start erase on unprotected sectors */ |
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179 | for (sect = s_first; sect <= s_last && !ctrlc (); sect++) { |
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180 | if (info->protect[sect] == 0) { /* not protected */ |
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181 | vu_short *addr = (vu_short *) (info->start[sect]); |
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182 | |
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183 | /* arm simple, non interrupt dependent timer */ |
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184 | reset_timer_masked(); |
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185 | |
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186 | MEM_FLASH_ADDR1 = CMD_UNLOCK1; |
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187 | MEM_FLASH_ADDR2 = CMD_UNLOCK2; |
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188 | MEM_FLASH_ADDR1 = CMD_ERASE_SETUP; |
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189 | |
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190 | MEM_FLASH_ADDR1 = CMD_UNLOCK1; |
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191 | MEM_FLASH_ADDR2 = CMD_UNLOCK2; |
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192 | *addr = CMD_ERASE_CONFIRM; |
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193 | |
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194 | /* wait until flash is ready */ |
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195 | while (1) { |
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196 | result = *addr; |
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197 | |
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198 | /* check timeout */ |
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199 | if (get_timer_masked() > CFG_FLASH_ERASE_TOUT) { |
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200 | MEM_FLASH_ADDR1 = CMD_READ_ARRAY; |
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201 | rc = ERR_TIMOUT; |
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202 | break; |
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203 | } |
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204 | |
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205 | if ((result & 0xfff) & BIT_ERASE_DONE) |
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206 | break; |
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207 | |
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208 | if ((result & 0xffff) & BIT_PROGRAM_ERROR) { |
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209 | rc = ERR_PROG_ERROR; |
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210 | break; |
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211 | } |
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212 | } |
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213 | |
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214 | MEM_FLASH_ADDR1 = CMD_READ_ARRAY; |
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215 | |
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216 | if (rc != ERR_OK) |
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217 | goto out; |
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218 | |
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219 | putc('.'); |
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220 | } |
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221 | } |
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222 | out: |
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223 | /* allow flash to settle - wait 10 ms */ |
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224 | udelay_masked(10000); |
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225 | |
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226 | return rc; |
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227 | } |
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228 | |
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229 | /*----------------------------------------------------------------------- |
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230 | * Copy memory to flash |
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231 | */ |
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232 | |
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233 | static int write_hword(flash_info_t *info, ulong dest, ushort data) |
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234 | { |
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235 | vu_short *addr = (vu_short *) dest; |
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236 | ushort result; |
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237 | int rc = ERR_OK; |
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238 | |
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239 | /* check if flash is (sufficiently) erased */ |
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240 | result = *addr; |
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241 | if ((result & data) != data) |
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242 | return ERR_NOT_ERASED; |
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243 | |
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244 | MEM_FLASH_ADDR1 = CMD_UNLOCK1; |
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245 | MEM_FLASH_ADDR2 = CMD_UNLOCK2; |
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246 | MEM_FLASH_ADDR1 = CMD_PROGRAM; |
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247 | *addr = data; |
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248 | |
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249 | /* arm simple, non interrupt dependent timer */ |
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250 | reset_timer_masked(); |
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251 | |
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252 | /* wait until flash is ready */ |
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253 | while (1) { |
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254 | result = *addr; |
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255 | |
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256 | /* check timeout */ |
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257 | if (get_timer_masked () > CFG_FLASH_ERASE_TOUT) { |
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258 | rc = ERR_TIMOUT; |
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259 | break; |
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260 | } |
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261 | |
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262 | if ((result & 0x80) == (data & 0x80)) |
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263 | break; |
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264 | |
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265 | if ((result & 0xffff) & BIT_PROGRAM_ERROR) { |
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266 | result = *addr; |
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267 | |
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268 | if ((result & 0x80) != (data & 0x80)) |
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269 | rc = ERR_PROG_ERROR; |
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270 | } |
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271 | } |
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272 | |
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273 | *addr = CMD_READ_ARRAY; |
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274 | |
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275 | if (*addr != data) |
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276 | rc = ERR_PROG_ERROR; |
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277 | |
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278 | return rc; |
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279 | } |
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280 | |
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281 | /*----------------------------------------------------------------------- |
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282 | * Copy memory to flash. |
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283 | */ |
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284 | |
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285 | int write_buff(flash_info_t *info, uchar *src, ulong addr, ulong cnt) |
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286 | { |
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287 | ulong cp, wp; |
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288 | int l; |
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289 | int i, rc; |
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290 | ushort data; |
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291 | |
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292 | wp = (addr & ~1); /* get lower word aligned address */ |
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293 | |
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294 | /* |
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295 | * handle unaligned start bytes |
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296 | */ |
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297 | if ((l = addr - wp) != 0) { |
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298 | data = 0; |
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299 | for (i = 0, cp = wp; i < l; ++i, ++cp) |
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300 | data = (data >> 8) | (*(uchar *) cp << 8); |
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301 | for (; i < 2 && cnt > 0; ++i) { |
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302 | data = (data >> 8) | (*src++ << 8); |
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303 | --cnt; |
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304 | ++cp; |
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305 | } |
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306 | for (; cnt == 0 && i < 2; ++i, ++cp) |
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307 | data = (data >> 8) | (*(uchar *) cp << 8); |
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308 | |
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309 | if ((rc = write_hword(info, wp, data)) != 0) |
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310 | return (rc); |
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311 | wp += 2; |
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312 | } |
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313 | |
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314 | /* |
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315 | * handle word aligned part |
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316 | */ |
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317 | while (cnt >= 2) { |
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318 | data = *((vu_short *) src); |
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319 | if ((rc = write_hword(info, wp, data)) != 0) |
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320 | return (rc); |
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321 | src += 2; |
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322 | wp += 2; |
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323 | cnt -= 2; |
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324 | } |
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325 | |
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326 | if (cnt == 0) |
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327 | return ERR_OK; |
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328 | |
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329 | /* |
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330 | * handle unaligned tail bytes |
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331 | */ |
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332 | data = 0; |
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333 | for (i = 0, cp = wp; i < 2 && cnt > 0; ++i, ++cp) { |
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334 | data = (data >> 8) | (*src++ << 8); |
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335 | --cnt; |
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336 | } |
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337 | for (; i < 2; ++i, ++cp) |
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338 | data = (data >> 8) | (*(uchar *) cp << 8); |
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339 | |
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340 | return write_hword(info, wp, data); |
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341 | } |
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342 | |
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343 | #endif |
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