1 | /* |
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2 | * (C) Copyright 2000 |
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3 | * Wolfgang Denk, DENX Software Engineering, wd@denx.de. |
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4 | * |
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5 | * See file CREDITS for list of people who contributed to this |
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6 | * project. |
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7 | * |
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8 | * This program is free software; you can redistribute it and/or |
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9 | * modify it under the terms of the GNU General Public License as |
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10 | * published by the Free Software Foundation; either version 2 of |
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11 | * the License, or (at your option) any later version. |
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12 | * |
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13 | * This program is distributed in the hope that it will be useful, |
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14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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16 | * GNU General Public License for more details. |
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17 | * |
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18 | * You should have received a copy of the GNU General Public License |
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19 | * along with this program; if not, write to the Free Software |
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20 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, |
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21 | * MA 02111-1307 USA |
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22 | */ |
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23 | |
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24 | #include <common.h> |
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25 | #include <mpc8xx.h> |
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26 | |
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27 | flash_info_t flash_info[CFG_MAX_FLASH_BANKS]; /* info for FLASH chips */ |
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28 | |
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29 | #if defined(CONFIG_ENV_IS_IN_FLASH) |
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30 | # ifndef CONFIG_ENV_ADDR |
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31 | # define CONFIG_ENV_ADDR (CFG_FLASH_BASE + CONFIG_ENV_OFFSET) |
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32 | # endif |
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33 | # ifndef CONFIG_ENV_SIZE |
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34 | # define CONFIG_ENV_SIZE CONFIG_ENV_SECT_SIZE |
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35 | # endif |
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36 | # ifndef CONFIG_ENV_SECT_SIZE |
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37 | # define CONFIG_ENV_SECT_SIZE CONFIG_ENV_SIZE |
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38 | # endif |
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39 | #endif |
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40 | |
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41 | /*----------------------------------------------------------------------- |
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42 | * Functions |
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43 | */ |
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44 | static ulong flash_get_size (vu_long *addr, flash_info_t *info); |
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45 | static int write_data (flash_info_t *info, ulong dest, ulong data); |
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46 | static void flash_get_offsets (ulong base, flash_info_t *info); |
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47 | |
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48 | /*----------------------------------------------------------------------- |
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49 | */ |
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50 | |
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51 | unsigned long flash_init (void) |
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52 | { |
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53 | volatile immap_t *immap = (immap_t *)CFG_IMMR; |
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54 | volatile memctl8xx_t *memctl = &immap->im_memctl; |
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55 | unsigned long size_b0; |
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56 | int i; |
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57 | |
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58 | /* Init: no FLASHes known */ |
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59 | for (i=0; i<CFG_MAX_FLASH_BANKS; ++i) { |
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60 | flash_info[i].flash_id = FLASH_UNKNOWN; |
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61 | } |
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62 | |
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63 | /* Static FLASH Bank configuration here - FIXME XXX */ |
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64 | |
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65 | size_b0 = flash_get_size((vu_long *)FLASH_BASE0_PRELIM, &flash_info[0]); |
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66 | |
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67 | if (flash_info[0].flash_id == FLASH_UNKNOWN) { |
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68 | printf ("## Unknown FLASH on Bank 0: " |
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69 | "ID 0x%lx, Size = 0x%08lx = %ld MB\n", |
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70 | flash_info[0].flash_id, |
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71 | size_b0, size_b0<<20); |
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72 | } |
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73 | |
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74 | /* Remap FLASH according to real size */ |
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75 | memctl->memc_or0 = CFG_OR_TIMING_FLASH | (-size_b0 & 0xFFFF8000); |
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76 | memctl->memc_br0 = (CFG_FLASH_BASE & BR_BA_MSK) | \ |
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77 | BR_MS_GPCM | BR_PS_16 | BR_V; |
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78 | |
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79 | /* Re-do sizing to get full correct info */ |
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80 | size_b0 = flash_get_size((vu_long *)CFG_FLASH_BASE, &flash_info[0]); |
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81 | |
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82 | flash_get_offsets (CFG_FLASH_BASE, &flash_info[0]); |
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83 | |
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84 | flash_info[0].size = size_b0; |
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85 | |
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86 | #if CFG_MONITOR_BASE >= CFG_FLASH_BASE |
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87 | /* monitor protection ON by default */ |
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88 | flash_protect(FLAG_PROTECT_SET, |
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89 | CFG_MONITOR_BASE, |
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90 | CFG_MONITOR_BASE+monitor_flash_len-1, |
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91 | &flash_info[0]); |
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92 | #endif |
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93 | |
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94 | #ifdef CONFIG_ENV_IS_IN_FLASH |
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95 | /* ENV protection ON by default */ |
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96 | flash_protect(FLAG_PROTECT_SET, |
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97 | CONFIG_ENV_ADDR, |
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98 | CONFIG_ENV_ADDR+CONFIG_ENV_SECT_SIZE-1, |
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99 | &flash_info[0]); |
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100 | #endif |
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101 | |
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102 | return (size_b0); |
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103 | } |
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104 | |
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105 | /*----------------------------------------------------------------------- |
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106 | */ |
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107 | static void flash_get_offsets (ulong base, flash_info_t *info) |
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108 | { |
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109 | int i; |
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110 | |
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111 | if (info->flash_id == FLASH_UNKNOWN) { |
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112 | return; |
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113 | } |
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114 | |
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115 | switch (info->flash_id & FLASH_VENDMASK) { |
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116 | case FLASH_MAN_MT: |
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117 | if (info->flash_id & FLASH_BTYPE) { |
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118 | /* set sector offsets for bottom boot block type */ |
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119 | info->start[0] = base + 0x00000000; |
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120 | info->start[1] = base + 0x00004000; |
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121 | info->start[2] = base + 0x00006000; |
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122 | info->start[3] = base + 0x00008000; |
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123 | for (i = 4; i < info->sector_count; i++) { |
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124 | info->start[i] = base + ((i-3) * 0x00020000); |
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125 | } |
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126 | } else { |
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127 | /* set sector offsets for top boot block type */ |
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128 | i = info->sector_count - 1; |
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129 | info->start[i--] = base + info->size - 0x00004000; |
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130 | info->start[i--] = base + info->size - 0x00006000; |
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131 | info->start[i--] = base + info->size - 0x00008000; |
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132 | for (; i >= 0; i--) { |
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133 | info->start[i] = base + i * 0x00020000; |
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134 | } |
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135 | } |
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136 | return; |
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137 | |
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138 | case FLASH_MAN_SST: |
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139 | for (i = 0; i < info->sector_count; i++) { |
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140 | info->start[i] = base + (i * 0x00002000); |
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141 | } |
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142 | return; |
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143 | |
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144 | case FLASH_MAN_AMD: |
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145 | case FLASH_MAN_FUJ: |
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146 | |
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147 | /* set up sector start address table */ |
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148 | if (info->flash_id & FLASH_BTYPE) { |
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149 | /* set sector offsets for bottom boot block type */ |
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150 | info->start[0] = base + 0x00000000; |
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151 | info->start[1] = base + 0x00008000; |
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152 | info->start[2] = base + 0x0000C000; |
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153 | info->start[3] = base + 0x00010000; |
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154 | for (i = 4; i < info->sector_count; i++) { |
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155 | info->start[i] = base + (i * 0x00020000) - 0x00060000; |
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156 | } |
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157 | } else { |
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158 | /* set sector offsets for top boot block type */ |
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159 | i = info->sector_count - 1; |
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160 | info->start[i--] = base + info->size - 0x00008000; |
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161 | info->start[i--] = base + info->size - 0x0000C000; |
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162 | info->start[i--] = base + info->size - 0x00010000; |
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163 | for (; i >= 0; i--) { |
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164 | info->start[i] = base + i * 0x00020000; |
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165 | } |
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166 | } |
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167 | return; |
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168 | default: |
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169 | printf ("Don't know sector ofsets for flash type 0x%lx\n", |
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170 | info->flash_id); |
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171 | return; |
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172 | } |
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173 | } |
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174 | |
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175 | /*----------------------------------------------------------------------- |
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176 | */ |
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177 | void flash_print_info (flash_info_t *info) |
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178 | { |
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179 | int i; |
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180 | |
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181 | if (info->flash_id == FLASH_UNKNOWN) { |
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182 | printf ("missing or unknown FLASH type\n"); |
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183 | return; |
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184 | } |
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185 | |
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186 | switch (info->flash_id & FLASH_VENDMASK) { |
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187 | case FLASH_MAN_AMD: printf ("AMD "); break; |
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188 | case FLASH_MAN_FUJ: printf ("Fujitsu "); break; |
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189 | case FLASH_MAN_SST: printf ("SST "); break; |
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190 | case FLASH_MAN_STM: printf ("STM "); break; |
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191 | case FLASH_MAN_MT: printf ("MT "); break; |
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192 | case FLASH_MAN_INTEL: printf ("Intel "); break; |
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193 | default: printf ("Unknown Vendor "); break; |
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194 | } |
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195 | |
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196 | switch (info->flash_id & FLASH_TYPEMASK) { |
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197 | case FLASH_AM400B: printf ("AM29LV400B (4 Mbit, bottom boot sect)\n"); |
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198 | break; |
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199 | case FLASH_AM400T: printf ("AM29LV400T (4 Mbit, top boot sector)\n"); |
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200 | break; |
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201 | case FLASH_AM800B: printf ("AM29LV800B (8 Mbit, bottom boot sect)\n"); |
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202 | break; |
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203 | case FLASH_AM800T: printf ("AM29LV800T (8 Mbit, top boot sector)\n"); |
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204 | break; |
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205 | case FLASH_AM160B: printf ("AM29LV160B (16 Mbit, bottom boot sect)\n"); |
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206 | break; |
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207 | case FLASH_AM160T: printf ("AM29LV160T (16 Mbit, top boot sector)\n"); |
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208 | break; |
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209 | case FLASH_AM320B: printf ("AM29LV320B (32 Mbit, bottom boot sect)\n"); |
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210 | break; |
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211 | case FLASH_AM320T: printf ("AM29LV320T (32 Mbit, top boot sector)\n"); |
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212 | break; |
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213 | case FLASH_SST200A: printf ("39xF200A (2M = 128K x 16)\n"); |
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214 | break; |
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215 | case FLASH_SST400A: printf ("39xF400A (4M = 256K x 16)\n"); |
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216 | break; |
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217 | case FLASH_SST800A: printf ("39xF800A (8M = 512K x 16)\n"); |
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218 | break; |
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219 | case FLASH_STM800AB: printf ("M29W800AB (8M = 512K x 16)\n"); |
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220 | break; |
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221 | case FLASH_28F008S5: printf ("28F008S5 (1M = 64K x 16)\n"); |
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222 | break; |
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223 | case FLASH_28F400_T: printf ("28F400B3 (4Mbit, top boot sector)\n"); |
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224 | break; |
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225 | case FLASH_28F400_B: printf ("28F400B3 (4Mbit, bottom boot sector)\n"); |
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226 | break; |
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227 | default: printf ("Unknown Chip Type\n"); |
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228 | break; |
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229 | } |
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230 | |
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231 | if (info->size >= (1 << 20)) { |
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232 | i = 20; |
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233 | } else { |
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234 | i = 10; |
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235 | } |
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236 | printf (" Size: %ld %cB in %d Sectors\n", |
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237 | info->size >> i, |
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238 | (i == 20) ? 'M' : 'k', |
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239 | info->sector_count); |
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240 | |
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241 | printf (" Sector Start Addresses:"); |
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242 | for (i=0; i<info->sector_count; ++i) { |
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243 | if ((i % 5) == 0) |
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244 | printf ("\n "); |
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245 | printf (" %08lX%s", |
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246 | info->start[i], |
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247 | info->protect[i] ? " (RO)" : " " |
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248 | ); |
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249 | } |
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250 | printf ("\n"); |
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251 | return; |
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252 | } |
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253 | |
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254 | /*----------------------------------------------------------------------- |
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255 | */ |
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256 | |
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257 | |
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258 | /*----------------------------------------------------------------------- |
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259 | */ |
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260 | |
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261 | /* |
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262 | * The following code cannot be run from FLASH! |
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263 | */ |
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264 | |
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265 | static ulong flash_get_size (vu_long *addr, flash_info_t *info) |
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266 | { |
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267 | ushort value; |
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268 | vu_short *saddr = (vu_short *)addr; |
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269 | |
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270 | /* Read Manufacturer ID */ |
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271 | saddr[0] = 0x0090; |
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272 | value = saddr[0]; |
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273 | |
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274 | switch (value) { |
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275 | case (AMD_MANUFACT & 0xFFFF): |
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276 | info->flash_id = FLASH_MAN_AMD; |
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277 | break; |
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278 | case (FUJ_MANUFACT & 0xFFFF): |
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279 | info->flash_id = FLASH_MAN_FUJ; |
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280 | break; |
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281 | case (SST_MANUFACT & 0xFFFF): |
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282 | info->flash_id = FLASH_MAN_SST; |
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283 | break; |
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284 | case (STM_MANUFACT & 0xFFFF): |
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285 | info->flash_id = FLASH_MAN_STM; |
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286 | break; |
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287 | case (MT_MANUFACT & 0xFFFF): |
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288 | info->flash_id = FLASH_MAN_MT; |
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289 | break; |
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290 | default: |
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291 | info->flash_id = FLASH_UNKNOWN; |
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292 | info->sector_count = 0; |
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293 | info->size = 0; |
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294 | saddr[0] = 0x00FF; /* restore read mode */ |
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295 | return (0); /* no or unknown flash */ |
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296 | } |
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297 | |
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298 | value = saddr[1]; /* device ID */ |
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299 | |
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300 | switch (value) { |
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301 | case (AMD_ID_LV400T & 0xFFFF): |
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302 | info->flash_id += FLASH_AM400T; |
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303 | info->sector_count = 11; |
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304 | info->size = 0x00100000; |
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305 | break; /* => 1 MB */ |
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306 | |
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307 | case (AMD_ID_LV400B & 0xFFFF): |
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308 | info->flash_id += FLASH_AM400B; |
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309 | info->sector_count = 11; |
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310 | info->size = 0x00100000; |
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311 | break; /* => 1 MB */ |
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312 | |
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313 | case (AMD_ID_LV800T & 0xFFFF): |
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314 | info->flash_id += FLASH_AM800T; |
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315 | info->sector_count = 19; |
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316 | info->size = 0x00200000; |
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317 | break; /* => 2 MB */ |
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318 | |
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319 | case (AMD_ID_LV800B & 0xFFFF): |
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320 | info->flash_id += FLASH_AM800B; |
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321 | info->sector_count = 19; |
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322 | info->size = 0x00200000; |
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323 | break; /* => 2 MB */ |
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324 | |
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325 | case (AMD_ID_LV160T & 0xFFFF): |
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326 | info->flash_id += FLASH_AM160T; |
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327 | info->sector_count = 35; |
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328 | info->size = 0x00400000; |
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329 | break; /* => 4 MB */ |
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330 | |
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331 | case (AMD_ID_LV160B & 0xFFFF): |
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332 | info->flash_id += FLASH_AM160B; |
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333 | info->sector_count = 35; |
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334 | info->size = 0x00400000; |
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335 | break; /* => 4 MB */ |
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336 | #if 0 /* enable when device IDs are available */ |
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337 | case (AMD_ID_LV320T & 0xFFFF): |
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338 | info->flash_id += FLASH_AM320T; |
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339 | info->sector_count = 67; |
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340 | info->size = 0x00800000; |
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341 | break; /* => 8 MB */ |
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342 | |
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343 | case (AMD_ID_LV320B & 0xFFFF): |
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344 | info->flash_id += FLASH_AM320B; |
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345 | info->sector_count = 67; |
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346 | info->size = 0x00800000; |
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347 | break; /* => 8 MB */ |
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348 | #endif |
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349 | case (SST_ID_xF200A & 0xFFFF): |
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350 | info->flash_id += FLASH_SST200A; |
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351 | info->sector_count = 64; /* 39xF200A ID ( 2M = 128K x 16 ) */ |
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352 | info->size = 0x00080000; |
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353 | break; |
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354 | case (SST_ID_xF400A & 0xFFFF): |
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355 | info->flash_id += FLASH_SST400A; |
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356 | info->sector_count = 128; /* 39xF400A ID ( 4M = 256K x 16 ) */ |
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357 | info->size = 0x00100000; |
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358 | break; |
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359 | case (SST_ID_xF800A & 0xFFFF): |
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360 | info->flash_id += FLASH_SST800A; |
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361 | info->sector_count = 256; /* 39xF800A ID ( 8M = 512K x 16 ) */ |
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362 | info->size = 0x00200000; |
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363 | break; /* => 2 MB */ |
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364 | case (STM_ID_x800AB & 0xFFFF): |
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365 | info->flash_id += FLASH_STM800AB; |
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366 | info->sector_count = 19; |
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367 | info->size = 0x00200000; |
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368 | break; /* => 2 MB */ |
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369 | case (MT_ID_28F400_T & 0xFFFF): |
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370 | info->flash_id += FLASH_28F400_T; |
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371 | info->sector_count = 7; |
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372 | info->size = 0x00080000; |
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373 | break; /* => 512 kB */ |
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374 | case (MT_ID_28F400_B & 0xFFFF): |
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375 | info->flash_id += FLASH_28F400_B; |
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376 | info->sector_count = 7; |
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377 | info->size = 0x00080000; |
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378 | break; /* => 512 kB */ |
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379 | default: |
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380 | info->flash_id = FLASH_UNKNOWN; |
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381 | saddr[0] = 0x00FF; /* restore read mode */ |
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382 | return (0); /* => no or unknown flash */ |
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383 | |
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384 | } |
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385 | |
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386 | if (info->sector_count > CFG_MAX_FLASH_SECT) { |
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387 | printf ("** ERROR: sector count %d > max (%d) **\n", |
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388 | info->sector_count, CFG_MAX_FLASH_SECT); |
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389 | info->sector_count = CFG_MAX_FLASH_SECT; |
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390 | } |
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391 | |
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392 | saddr[0] = 0x00FF; /* restore read mode */ |
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393 | |
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394 | return (info->size); |
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395 | } |
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396 | |
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397 | |
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398 | /*----------------------------------------------------------------------- |
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399 | */ |
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400 | |
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401 | int flash_erase (flash_info_t *info, int s_first, int s_last) |
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402 | { |
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403 | int flag, prot, sect; |
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404 | ulong start, now, last; |
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405 | |
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406 | if ((s_first < 0) || (s_first > s_last)) { |
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407 | if (info->flash_id == FLASH_UNKNOWN) { |
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408 | printf ("- missing\n"); |
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409 | } else { |
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410 | printf ("- no sectors to erase\n"); |
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411 | } |
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412 | return 1; |
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413 | } |
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414 | |
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415 | if ((info->flash_id & FLASH_VENDMASK) != FLASH_MAN_MT) { |
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416 | printf ("Can erase only MT flash types - aborted\n"); |
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417 | return 1; |
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418 | } |
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419 | |
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420 | prot = 0; |
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421 | for (sect=s_first; sect<=s_last; ++sect) { |
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422 | if (info->protect[sect]) { |
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423 | prot++; |
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424 | } |
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425 | } |
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426 | |
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427 | if (prot) { |
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428 | printf ("- Warning: %d protected sectors will not be erased!\n", |
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429 | prot); |
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430 | } else { |
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431 | printf ("\n"); |
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432 | } |
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433 | |
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434 | start = get_timer (0); |
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435 | last = start; |
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436 | /* Start erase on unprotected sectors */ |
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437 | for (sect = s_first; sect<=s_last; sect++) { |
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438 | if (info->protect[sect] == 0) { /* not protected */ |
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439 | vu_short *addr = (vu_short *)(info->start[sect]); |
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440 | unsigned short status; |
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441 | |
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442 | /* Disable interrupts which might cause a timeout here */ |
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443 | flag = disable_interrupts(); |
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444 | |
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445 | *addr = 0x0050; /* clear status register */ |
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446 | *addr = 0x0020; /* erase setup */ |
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447 | *addr = 0x00D0; /* erase confirm */ |
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448 | |
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449 | /* re-enable interrupts if necessary */ |
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450 | if (flag) |
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451 | enable_interrupts(); |
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452 | |
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453 | /* wait at least 80us - let's wait 1 ms */ |
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454 | udelay (1000); |
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455 | |
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456 | while (((status = *addr) & 0x0080) != 0x0080) { |
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457 | if ((now=get_timer(start)) > CFG_FLASH_ERASE_TOUT) { |
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458 | printf ("Timeout\n"); |
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459 | *addr = 0x00FF; /* reset to read mode */ |
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460 | return 1; |
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461 | } |
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462 | |
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463 | /* show that we're waiting */ |
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464 | if ((now - last) > 1000) { /* every second */ |
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465 | putc ('.'); |
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466 | last = now; |
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467 | } |
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468 | } |
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469 | |
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470 | *addr = 0x00FF; /* reset to read mode */ |
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471 | } |
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472 | } |
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473 | printf (" done\n"); |
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474 | return 0; |
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475 | } |
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476 | |
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477 | /*----------------------------------------------------------------------- |
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478 | * Copy memory to flash, returns: |
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479 | * 0 - OK |
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480 | * 1 - write timeout |
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481 | * 2 - Flash not erased |
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482 | * 4 - Flash not identified |
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483 | */ |
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484 | |
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485 | #define FLASH_WIDTH 2 /* flash bus width in bytes */ |
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486 | |
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487 | int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt) |
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488 | { |
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489 | ulong cp, wp, data; |
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490 | int i, l, rc; |
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491 | |
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492 | if (info->flash_id == FLASH_UNKNOWN) { |
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493 | return 4; |
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494 | } |
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495 | |
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496 | wp = (addr & ~(FLASH_WIDTH-1)); /* get lower FLASH_WIDTH aligned address */ |
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497 | |
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498 | /* |
---|
499 | * handle unaligned start bytes |
---|
500 | */ |
---|
501 | if ((l = addr - wp) != 0) { |
---|
502 | data = 0; |
---|
503 | for (i=0, cp=wp; i<l; ++i, ++cp) { |
---|
504 | data = (data << 8) | (*(uchar *)cp); |
---|
505 | } |
---|
506 | for (; i<FLASH_WIDTH && cnt>0; ++i) { |
---|
507 | data = (data << 8) | *src++; |
---|
508 | --cnt; |
---|
509 | ++cp; |
---|
510 | } |
---|
511 | for (; cnt==0 && i<FLASH_WIDTH; ++i, ++cp) { |
---|
512 | data = (data << 8) | (*(uchar *)cp); |
---|
513 | } |
---|
514 | |
---|
515 | if ((rc = write_data(info, wp, data)) != 0) { |
---|
516 | return (rc); |
---|
517 | } |
---|
518 | wp += FLASH_WIDTH; |
---|
519 | } |
---|
520 | |
---|
521 | /* |
---|
522 | * handle FLASH_WIDTH aligned part |
---|
523 | */ |
---|
524 | while (cnt >= FLASH_WIDTH) { |
---|
525 | data = 0; |
---|
526 | for (i=0; i<FLASH_WIDTH; ++i) { |
---|
527 | data = (data << 8) | *src++; |
---|
528 | } |
---|
529 | if ((rc = write_data(info, wp, data)) != 0) { |
---|
530 | return (rc); |
---|
531 | } |
---|
532 | wp += FLASH_WIDTH; |
---|
533 | cnt -= FLASH_WIDTH; |
---|
534 | } |
---|
535 | |
---|
536 | if (cnt == 0) { |
---|
537 | return (0); |
---|
538 | } |
---|
539 | |
---|
540 | /* |
---|
541 | * handle unaligned tail bytes |
---|
542 | */ |
---|
543 | data = 0; |
---|
544 | for (i=0, cp=wp; i<FLASH_WIDTH && cnt>0; ++i, ++cp) { |
---|
545 | data = (data << 8) | *src++; |
---|
546 | --cnt; |
---|
547 | } |
---|
548 | for (; i<FLASH_WIDTH; ++i, ++cp) { |
---|
549 | data = (data << 8) | (*(uchar *)cp); |
---|
550 | } |
---|
551 | |
---|
552 | return (write_data(info, wp, data)); |
---|
553 | } |
---|
554 | |
---|
555 | /*----------------------------------------------------------------------- |
---|
556 | * Write a word to Flash, returns: |
---|
557 | * 0 - OK |
---|
558 | * 1 - write timeout |
---|
559 | * 2 - Flash not erased |
---|
560 | */ |
---|
561 | static int write_data (flash_info_t *info, ulong dest, ulong data) |
---|
562 | { |
---|
563 | vu_short *addr = (vu_short *)dest; |
---|
564 | ushort sdata = (ushort)data; |
---|
565 | ushort status; |
---|
566 | ulong start; |
---|
567 | int flag; |
---|
568 | |
---|
569 | /* Check if Flash is (sufficiently) erased */ |
---|
570 | if ((*addr & sdata) != sdata) { |
---|
571 | return (2); |
---|
572 | } |
---|
573 | /* Disable interrupts which might cause a timeout here */ |
---|
574 | flag = disable_interrupts(); |
---|
575 | |
---|
576 | *addr = 0x0040; /* write setup */ |
---|
577 | *addr = sdata; |
---|
578 | |
---|
579 | /* re-enable interrupts if necessary */ |
---|
580 | if (flag) |
---|
581 | enable_interrupts(); |
---|
582 | |
---|
583 | start = get_timer (0); |
---|
584 | |
---|
585 | while (((status = *addr) & 0x0080) != 0x0080) { |
---|
586 | if (get_timer(start) > CFG_FLASH_WRITE_TOUT) { |
---|
587 | *addr = 0x00FF; /* restore read mode */ |
---|
588 | return (1); |
---|
589 | } |
---|
590 | } |
---|
591 | |
---|
592 | *addr = 0x00FF; /* restore read mode */ |
---|
593 | |
---|
594 | return (0); |
---|
595 | } |
---|
596 | |
---|
597 | /*----------------------------------------------------------------------- |
---|
598 | */ |
---|