1 | /* |
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2 | * (C) Copyright 2000 |
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3 | * Marius Groeger <mgroeger@sysgo.de> |
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4 | * Sysgo Real-Time Solutions, GmbH <www.elinos.com> |
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5 | * |
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6 | * (C) Copyright 2000 |
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7 | * Wolfgang Denk, DENX Software Engineering, wd@denx.de. |
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8 | * |
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9 | * Flash Routines for AMD 29F080B devices |
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10 | * Added support for 64bit and AMD 29DL323B |
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11 | * |
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12 | *-------------------------------------------------------------------- |
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13 | * See file CREDITS for list of people who contributed to this |
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14 | * project. |
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15 | * |
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16 | * This program is free software; you can redistribute it and/or |
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17 | * modify it under the terms of the GNU General Public License as |
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18 | * published by the Free Software Foundation; either version 2 of |
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19 | * the License, or (at your option) any later version. |
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20 | * |
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21 | * This program is distributed in the hope that it will be useful, |
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22 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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23 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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24 | * GNU General Public License for more details. |
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25 | * |
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26 | * You should have received a copy of the GNU General Public License |
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27 | * along with this program; if not, write to the Free Software |
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28 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, |
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29 | * MA 02111-1307 USA |
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30 | */ |
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31 | |
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32 | #include <common.h> |
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33 | #include <mpc8xx.h> |
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34 | #include <asm/io.h> |
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35 | |
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36 | flash_info_t flash_info[CFG_MAX_FLASH_BANKS]; |
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37 | |
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38 | #define RD_SWP32(x) in_le32((volatile u32*)x) |
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39 | |
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40 | /*----------------------------------------------------------------------- |
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41 | * Functions |
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42 | */ |
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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_word (flash_info_t *info, ulong dest, ulong data); |
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46 | |
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47 | /*----------------------------------------------------------------------- |
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48 | */ |
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49 | |
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50 | unsigned long flash_init (void) |
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51 | { |
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52 | unsigned long size; |
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53 | int i; |
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54 | |
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55 | /* Init: no FLASHes known */ |
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56 | for (i=0; i<CFG_MAX_FLASH_BANKS; ++i) { |
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57 | flash_info[i].flash_id = FLASH_UNKNOWN; |
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58 | } |
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59 | |
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60 | /* for now, only support the 4 MB Flash SIMM */ |
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61 | size = flash_get_size((vu_long *)CFG_FLASH0_BASE, &flash_info[0]); |
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62 | |
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63 | /* |
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64 | * protect monitor and environment sectors |
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65 | */ |
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66 | |
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67 | #if CFG_MONITOR_BASE >= CFG_FLASH0_BASE |
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68 | flash_protect(FLAG_PROTECT_SET, |
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69 | CFG_MONITOR_BASE, |
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70 | CFG_MONITOR_BASE+monitor_flash_len-1, |
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71 | &flash_info[0]); |
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72 | #endif |
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73 | |
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74 | #if defined(CONFIG_ENV_IS_IN_FLASH) && defined(CONFIG_ENV_ADDR) |
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75 | # ifndef CONFIG_ENV_SIZE |
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76 | # define CONFIG_ENV_SIZE CONFIG_ENV_SECT_SIZE |
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77 | # endif |
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78 | flash_protect(FLAG_PROTECT_SET, |
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79 | CONFIG_ENV_ADDR, |
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80 | CONFIG_ENV_ADDR + CONFIG_ENV_SIZE - 1, |
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81 | &flash_info[0]); |
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82 | #endif |
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83 | |
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84 | return /*size*/ (CFG_FLASH0_SIZE * 1024 * 1024); |
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85 | } |
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86 | |
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87 | /*----------------------------------------------------------------------- |
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88 | */ |
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89 | void flash_print_info (flash_info_t *info) |
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90 | { |
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91 | int i; |
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92 | |
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93 | if (info->flash_id == FLASH_UNKNOWN) { |
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94 | printf ("missing or unknown FLASH type\n"); |
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95 | return; |
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96 | } |
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97 | |
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98 | switch (info->flash_id & FLASH_VENDMASK) { |
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99 | case (AMD_MANUFACT & FLASH_VENDMASK): |
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100 | printf ("AMD "); |
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101 | break; |
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102 | case (FUJ_MANUFACT & FLASH_VENDMASK): |
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103 | printf ("FUJITSU "); |
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104 | break; |
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105 | case (SST_MANUFACT & FLASH_VENDMASK): |
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106 | printf ("SST "); |
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107 | break; |
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108 | default: |
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109 | printf ("Unknown Vendor "); |
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110 | break; |
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111 | } |
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112 | |
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113 | switch (info->flash_id & FLASH_TYPEMASK) { |
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114 | case (AMD_ID_DL323B & FLASH_TYPEMASK): |
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115 | printf("AM29DL323B (32 MBit)\n"); |
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116 | break; |
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117 | default: |
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118 | printf ("Unknown Chip Type\n"); |
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119 | break; |
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120 | } |
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121 | |
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122 | printf (" Size: %ld MB in %d Sectors\n", |
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123 | info->size >> 20, info->sector_count); |
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124 | |
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125 | printf (" Sector Start Addresses:"); |
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126 | for (i = 0; i < info->sector_count; ++i) { |
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127 | if ((i % 5) == 0) printf ("\n "); |
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128 | printf (" %08lX%s", |
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129 | info->start[i], |
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130 | info->protect[i] ? " (RO)" : " " |
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131 | ); |
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132 | } |
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133 | printf ("\n"); |
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134 | return; |
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135 | } |
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136 | |
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137 | /* |
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138 | * The following code cannot be run from FLASH! |
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139 | */ |
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140 | |
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141 | static ulong flash_get_size (vu_long *addr, flash_info_t *info) |
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142 | { |
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143 | short i; |
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144 | vu_long vendor[2], devid[2]; |
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145 | ulong base = (ulong)addr; |
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146 | |
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147 | /* Reset and Write auto select command: read Manufacturer ID */ |
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148 | addr[0] = 0xf0f0f0f0; |
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149 | addr[2 * 0x0555] = 0xAAAAAAAA; |
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150 | addr[2 * 0x02AA] = 0x55555555; |
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151 | addr[2 * 0x0555] = 0x90909090; |
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152 | addr[1] = 0xf0f0f0f0; |
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153 | addr[2 * 0x0555 + 1] = 0xAAAAAAAA; |
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154 | addr[2 * 0x02AA + 1] = 0x55555555; |
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155 | addr[2 * 0x0555 + 1] = 0x90909090; |
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156 | udelay (1000); |
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157 | |
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158 | vendor[0] = RD_SWP32(&addr[0]); |
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159 | vendor[1] = RD_SWP32(&addr[1]); |
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160 | if (vendor[0] != vendor[1] || vendor[0] != AMD_MANUFACT) { |
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161 | info->size = 0; |
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162 | goto out; |
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163 | } |
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164 | |
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165 | devid[0] = RD_SWP32(&addr[2]); |
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166 | devid[1] = RD_SWP32(&addr[3]); |
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167 | |
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168 | if (devid[0] == AMD_ID_DL323B) { |
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169 | /* |
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170 | * we have 2 Banks |
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171 | * Bank 1 (23 Sectors): 0-7=8kbyte, 8-22=64kbyte |
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172 | * Bank 2 (48 Sectors): 23-70=64kbyte |
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173 | */ |
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174 | info->flash_id = (AMD_MANUFACT & FLASH_VENDMASK) | |
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175 | (AMD_ID_DL323B & FLASH_TYPEMASK); |
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176 | info->sector_count = 71; |
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177 | info->size = 4 * (8 * 8 + 63 * 64) * 1024; |
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178 | } |
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179 | else { |
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180 | info->size = 0; |
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181 | goto out; |
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182 | } |
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183 | |
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184 | /* set up sector start address table */ |
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185 | for (i = 0; i < 8; i++) { |
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186 | info->start[i] = base + (i * 0x8000); |
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187 | } |
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188 | for (i = 8; i < info->sector_count; i++) { |
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189 | info->start[i] = base + (i * 0x40000) + 8 * 0x8000 - 8 * 0x40000; |
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190 | } |
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191 | |
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192 | /* check for protected sectors */ |
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193 | for (i = 0; i < info->sector_count; i++) { |
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194 | /* read sector protection at sector address */ |
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195 | addr = (volatile unsigned long *)(info->start[i]); |
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196 | addr[2 * 0x0555] = 0xAAAAAAAA; |
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197 | addr[2 * 0x02AA] = 0x55555555; |
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198 | addr[2 * 0x0555] = 0x90909090; |
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199 | addr[2 * 0x0555 + 1] = 0xAAAAAAAA; |
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200 | addr[2 * 0x02AA + 1] = 0x55555555; |
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201 | addr[2 * 0x0555 + 1] = 0x90909090; |
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202 | udelay (1000); |
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203 | base = RD_SWP32(&addr[4]); |
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204 | base |= RD_SWP32(&addr[5]); |
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205 | info->protect[i] = base & 0x00010001 ? 1 : 0; |
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206 | } |
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207 | addr = (vu_long*)info->start[0]; |
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208 | |
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209 | out: |
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210 | /* reset command */ |
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211 | addr[0] = 0xf0f0f0f0; |
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212 | addr[1] = 0xf0f0f0f0; |
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213 | |
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214 | return info->size; |
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215 | } |
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216 | |
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217 | |
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218 | /*----------------------------------------------------------------------- |
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219 | */ |
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220 | |
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221 | int flash_erase (flash_info_t *info, int s_first, int s_last) |
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222 | { |
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223 | vu_long *addr = (vu_long*)(info->start[0]); |
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224 | int flag, prot, sect, l_sect; |
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225 | ulong start, now, last; |
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226 | |
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227 | if ((s_first < 0) || (s_first > s_last)) { |
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228 | if (info->flash_id == FLASH_UNKNOWN) { |
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229 | printf ("- missing\n"); |
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230 | } else { |
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231 | printf ("- no sectors to erase\n"); |
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232 | } |
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233 | return 1; |
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234 | } |
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235 | |
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236 | prot = 0; |
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237 | for (sect = s_first; sect <= s_last; sect++) { |
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238 | if (info->protect[sect]) { |
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239 | prot++; |
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240 | } |
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241 | } |
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242 | |
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243 | if (prot) { |
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244 | printf ("- Warning: %d protected sectors will not be erased!\n", |
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245 | prot); |
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246 | } else { |
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247 | printf ("\n"); |
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248 | } |
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249 | |
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250 | l_sect = -1; |
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251 | |
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252 | /* Disable interrupts which might cause a timeout here */ |
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253 | flag = disable_interrupts(); |
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254 | |
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255 | addr[2 * 0x0555] = 0xAAAAAAAA; |
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256 | addr[2 * 0x02AA] = 0x55555555; |
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257 | addr[2 * 0x0555] = 0x80808080; |
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258 | addr[2 * 0x0555] = 0xAAAAAAAA; |
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259 | addr[2 * 0x02AA] = 0x55555555; |
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260 | addr[2 * 0x0555 + 1] = 0xAAAAAAAA; |
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261 | addr[2 * 0x02AA + 1] = 0x55555555; |
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262 | addr[2 * 0x0555 + 1] = 0x80808080; |
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263 | addr[2 * 0x0555 + 1] = 0xAAAAAAAA; |
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264 | addr[2 * 0x02AA + 1] = 0x55555555; |
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265 | udelay (100); |
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266 | |
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267 | /* Start erase on unprotected sectors */ |
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268 | for (sect = s_first; sect<=s_last; sect++) { |
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269 | if (info->protect[sect] == 0) { /* not protected */ |
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270 | addr = (vu_long*)(info->start[sect]); |
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271 | addr[0] = 0x30303030; |
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272 | addr[1] = 0x30303030; |
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273 | l_sect = sect; |
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274 | } |
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275 | } |
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276 | |
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277 | /* re-enable interrupts if necessary */ |
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278 | if (flag) |
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279 | enable_interrupts(); |
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280 | |
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281 | /* wait at least 80us - let's wait 1 ms */ |
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282 | udelay (1000); |
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283 | |
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284 | /* |
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285 | * We wait for the last triggered sector |
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286 | */ |
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287 | if (l_sect < 0) |
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288 | goto DONE; |
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289 | |
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290 | start = get_timer (0); |
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291 | last = start; |
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292 | addr = (vu_long*)(info->start[l_sect]); |
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293 | while ( (addr[0] & 0x80808080) != 0x80808080 || |
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294 | (addr[1] & 0x80808080) != 0x80808080) { |
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295 | if ((now = get_timer(start)) > CFG_FLASH_ERASE_TOUT) { |
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296 | printf ("Timeout\n"); |
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297 | return 1; |
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298 | } |
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299 | /* show that we're waiting */ |
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300 | if ((now - last) > 1000) { /* every second */ |
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301 | serial_putc ('.'); |
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302 | last = now; |
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303 | } |
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304 | } |
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305 | |
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306 | DONE: |
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307 | /* reset to read mode */ |
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308 | addr = (volatile unsigned long *)info->start[0]; |
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309 | addr[0] = 0xF0F0F0F0; /* reset bank */ |
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310 | addr[1] = 0xF0F0F0F0; /* reset bank */ |
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311 | |
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312 | printf (" done\n"); |
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313 | return 0; |
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314 | } |
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315 | |
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316 | /*----------------------------------------------------------------------- |
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317 | * Copy memory to flash, returns: |
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318 | * 0 - OK |
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319 | * 1 - write timeout |
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320 | * 2 - Flash not erased |
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321 | */ |
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322 | |
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323 | int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt) |
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324 | { |
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325 | ulong cp, wp, data; |
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326 | int i, l, rc; |
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327 | |
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328 | wp = (addr & ~3); /* get lower word aligned address */ |
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329 | |
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330 | /* |
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331 | * handle unaligned start bytes |
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332 | */ |
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333 | if ((l = addr - wp) != 0) { |
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334 | data = 0; |
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335 | for (i=0, cp=wp; i<l; ++i, ++cp) { |
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336 | data = (data << 8) | (*(uchar *)cp); |
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337 | } |
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338 | for (; i<4 && cnt>0; ++i) { |
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339 | data = (data << 8) | *src++; |
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340 | --cnt; |
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341 | ++cp; |
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342 | } |
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343 | for (; cnt==0 && i<4; ++i, ++cp) { |
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344 | data = (data << 8) | (*(uchar *)cp); |
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345 | } |
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346 | |
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347 | if ((rc = write_word(info, wp, data)) != 0) { |
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348 | return (rc); |
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349 | } |
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350 | wp += 4; |
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351 | } |
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352 | |
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353 | /* |
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354 | * handle word aligned part |
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355 | */ |
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356 | while (cnt >= 4) { |
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357 | data = 0; |
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358 | for (i=0; i<4; ++i) { |
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359 | data = (data << 8) | *src++; |
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360 | } |
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361 | if ((rc = write_word(info, wp, data)) != 0) { |
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362 | return (rc); |
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363 | } |
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364 | wp += 4; |
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365 | cnt -= 4; |
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366 | } |
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367 | |
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368 | if (cnt == 0) { |
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369 | return (0); |
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370 | } |
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371 | |
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372 | /* |
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373 | * handle unaligned tail bytes |
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374 | */ |
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375 | data = 0; |
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376 | for (i=0, cp=wp; i<4 && cnt>0; ++i, ++cp) { |
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377 | data = (data << 8) | *src++; |
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378 | --cnt; |
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379 | } |
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380 | for (; i<4; ++i, ++cp) { |
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381 | data = (data << 8) | (*(uchar *)cp); |
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382 | } |
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383 | |
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384 | return (write_word(info, wp, data)); |
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385 | } |
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386 | |
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387 | /*----------------------------------------------------------------------- |
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388 | * Write a word to Flash, returns: |
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389 | * 0 - OK |
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390 | * 1 - write timeout |
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391 | * 2 - Flash not erased |
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392 | */ |
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393 | static int write_word (flash_info_t *info, ulong dest, ulong data) |
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394 | { |
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395 | vu_long *addr = (vu_long*)(info->start[0]); |
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396 | ulong start; |
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397 | int flag; |
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398 | |
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399 | /* Check if Flash is (sufficiently) erased */ |
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400 | if ((*((vu_long *)dest) & data) != data) { |
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401 | return (2); |
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402 | } |
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403 | /* Disable interrupts which might cause a timeout here */ |
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404 | flag = disable_interrupts(); |
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405 | |
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406 | if ((dest & 0x00000004) == 0) { |
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407 | addr[2 * 0x0555] = 0xAAAAAAAA; |
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408 | addr[2 * 0x02AA] = 0x55555555; |
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409 | addr[2 * 0x0555] = 0xA0A0A0A0; |
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410 | } |
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411 | else { |
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412 | addr[2 * 0x0555 + 1] = 0xAAAAAAAA; |
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413 | addr[2 * 0x02AA + 1] = 0x55555555; |
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414 | addr[2 * 0x0555 + 1] = 0xA0A0A0A0; |
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415 | } |
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416 | |
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417 | *((vu_long *)dest) = data; |
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418 | |
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419 | /* re-enable interrupts if necessary */ |
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420 | if (flag) |
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421 | enable_interrupts(); |
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422 | |
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423 | /* data polling for D7 */ |
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424 | start = get_timer (0); |
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425 | while ((*((vu_long *)dest) & 0x80808080) != (data & 0x80808080)) { |
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426 | if (get_timer(start) > CFG_FLASH_WRITE_TOUT) { |
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427 | return (1); |
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428 | } |
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429 | } |
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430 | return (0); |
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431 | } |
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432 | |
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433 | /*----------------------------------------------------------------------- |
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434 | */ |
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