1 | /* |
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2 | * $Id$ |
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3 | * |
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4 | * RTEMS Project (http://www.rtems.org/) |
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5 | * |
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6 | * Copyright 2007 Chris Johns (chrisj@rtems.org) |
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7 | */ |
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8 | /** |
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9 | * Provide flash support for the AM26LV160 device. |
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10 | * |
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11 | * The M29W160D is the same device. |
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12 | */ |
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13 | |
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14 | #include <stdio.h> |
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15 | #include <errno.h> |
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16 | |
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17 | #include <rtems.h> |
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18 | |
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19 | #include <libchip/am29lv160.h> |
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20 | |
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21 | #ifndef AM26LV160_ERROR_TRACE |
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22 | #define AM26LV160_ERROR_TRACE (0) |
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23 | #endif |
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24 | |
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25 | /** |
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26 | * Boot blocks at the top |
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27 | */ |
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28 | const rtems_fdisk_segment_desc rtems_am29lv160t_segments[4] = |
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29 | { |
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30 | { |
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31 | .count = 31, |
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32 | .segment = 0, |
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33 | .offset = 0x00000000, |
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34 | .size = RTEMS_FDISK_KBYTES (64) |
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35 | }, |
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36 | { |
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37 | .count = 1, |
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38 | .segment = 31, |
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39 | .offset = 0x001f0000, |
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40 | .size = RTEMS_FDISK_KBYTES (32) |
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41 | }, |
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42 | { |
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43 | .count = 2, |
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44 | .segment = 32, |
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45 | .offset = 0x001f8000, |
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46 | .size = RTEMS_FDISK_KBYTES (8) |
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47 | }, |
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48 | { |
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49 | .count = 1, |
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50 | .segment = 34, |
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51 | .offset = 0x001fc000, |
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52 | .size = RTEMS_FDISK_KBYTES (16) |
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53 | } |
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54 | }; |
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55 | |
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56 | /** |
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57 | * Boot blocks at the bottom. |
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58 | */ |
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59 | const rtems_fdisk_segment_desc rtems_am29lv160b_segments[] = |
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60 | { |
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61 | { |
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62 | .count = 1, |
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63 | .segment = 0, |
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64 | .offset = 0x00000000, |
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65 | .size = RTEMS_FDISK_KBYTES (16) |
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66 | }, |
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67 | { |
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68 | . count = 2, |
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69 | .segment = 1, |
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70 | .offset = 0x00004000, |
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71 | .size = RTEMS_FDISK_KBYTES (8) |
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72 | }, |
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73 | { |
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74 | .count = 1, |
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75 | .segment = 3, |
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76 | .offset = 0x00008000, |
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77 | .size = RTEMS_FDISK_KBYTES (32) |
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78 | }, |
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79 | { |
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80 | .count = 31, |
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81 | .segment = 4, |
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82 | .offset = 0x00010000, |
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83 | .size = RTEMS_FDISK_KBYTES (64) |
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84 | } |
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85 | }; |
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86 | |
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87 | static int |
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88 | rtems_am29lv160_blank (const rtems_fdisk_segment_desc* sd, |
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89 | uint32_t device, |
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90 | uint32_t segment, |
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91 | uint32_t offset, |
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92 | uint32_t size) |
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93 | { |
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94 | const rtems_am29lv160_config* ac = &rtems_am29lv160_configuration[device]; |
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95 | volatile uint8_t* seg_8 = ac->base; |
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96 | volatile uint32_t* seg_32; |
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97 | uint32_t count; |
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98 | |
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99 | offset += sd->offset + (segment - sd->segment) * sd->size; |
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100 | |
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101 | seg_8 += offset; |
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102 | |
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103 | count = offset & (sizeof (uint32_t) - 1); |
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104 | size -= count; |
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105 | |
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106 | while (count--) |
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107 | if (*seg_8++ != 0xff) |
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108 | { |
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109 | #if AM26LV160_ERROR_TRACE |
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110 | printf ("AM26LV160: blank check error: %p = 0x%02x\n", |
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111 | seg_8 - 1, *(seg_8 - 1)); |
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112 | #endif |
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113 | return EIO; |
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114 | } |
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115 | |
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116 | seg_32 = (volatile uint32_t*) seg_8; |
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117 | |
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118 | count = size / sizeof (uint32_t); |
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119 | size -= count * sizeof (uint32_t); |
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120 | |
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121 | while (count--) |
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122 | if (*seg_32++ != 0xffffffff) |
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123 | { |
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124 | #if AM26LV160_ERROR_TRACE |
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125 | printf ("AM26LV160: blank check error: %p = 0x%08lx\n", |
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126 | seg_32 - 1, *(seg_32 - 1)); |
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127 | #endif |
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128 | return EIO; |
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129 | } |
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130 | |
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131 | seg_8 = (volatile uint8_t*) seg_32; |
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132 | |
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133 | while (size--) |
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134 | if (*seg_8++ != 0xff) |
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135 | { |
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136 | #if AM26LV160_ERROR_TRACE |
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137 | printf ("AM26LV160: blank check error: %p = 0x%02x\n", |
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138 | seg_8 - 1, *(seg_8 - 1)); |
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139 | #endif |
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140 | return EIO; |
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141 | } |
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142 | |
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143 | return 0; |
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144 | } |
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145 | |
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146 | static int |
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147 | rtems_am29lv160_verify (const rtems_fdisk_segment_desc* sd, |
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148 | uint32_t device, |
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149 | uint32_t segment, |
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150 | uint32_t offset, |
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151 | const void* buffer, |
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152 | uint32_t size) |
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153 | { |
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154 | const rtems_am29lv160_config* ac = &rtems_am29lv160_configuration[device]; |
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155 | const uint8_t* addr = ac->base; |
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156 | |
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157 | addr += (sd->offset + (segment - sd->segment) * sd->size) + offset; |
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158 | |
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159 | if (memcmp (addr, buffer, size) != 0) |
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160 | return EIO; |
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161 | |
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162 | return 0; |
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163 | } |
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164 | |
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165 | static int |
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166 | rtems_am29lv160_toggle_wait_8 (volatile uint8_t* status) |
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167 | { |
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168 | while (1) |
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169 | { |
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170 | volatile uint8_t status1 = *status; |
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171 | volatile uint8_t status2 = *status; |
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172 | |
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173 | if (((status1 ^ status2) & (1 << 6)) == 0) |
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174 | return 0; |
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175 | |
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176 | if ((status1 & (1 << 5)) != 0) |
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177 | { |
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178 | status1 = *status; |
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179 | status2 = *status; |
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180 | |
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181 | if (((status1 ^ status2) & (1 << 6)) == 0) |
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182 | return 0; |
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183 | |
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184 | #if AM26LV160_ERROR_TRACE |
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185 | printf ("AM26LV160: error bit detected: %p = 0x%04x\n", |
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186 | status, status1); |
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187 | #endif |
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188 | |
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189 | *status = 0xf0; |
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190 | return EIO; |
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191 | } |
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192 | } |
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193 | } |
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194 | |
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195 | static int |
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196 | rtems_am29lv160_toggle_wait_16 (volatile uint16_t* status) |
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197 | { |
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198 | while (1) |
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199 | { |
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200 | volatile uint16_t status1 = *status; |
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201 | volatile uint16_t status2 = *status; |
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202 | |
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203 | if (((status1 ^ status2) & (1 << 6)) == 0) |
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204 | return 0; |
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205 | |
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206 | if ((status1 & (1 << 5)) != 0) |
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207 | { |
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208 | status1 = *status; |
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209 | status2 = *status; |
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210 | |
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211 | if (((status1 ^ status2) & (1 << 6)) == 0) |
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212 | return 0; |
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213 | |
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214 | #if AM26LV160_ERROR_TRACE |
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215 | printf ("AM26LV160: error bit detected: %p = 0x%04x/0x%04x\n", |
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216 | status, status1, status2); |
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217 | #endif |
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218 | |
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219 | *status = 0xf0; |
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220 | return EIO; |
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221 | } |
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222 | } |
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223 | } |
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224 | |
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225 | static int |
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226 | rtems_am29lv160_write_data_8 (volatile uint8_t* base, |
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227 | uint32_t offset, |
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228 | const uint8_t* data, |
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229 | uint32_t size) |
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230 | { |
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231 | volatile uint8_t* seg = base + offset; |
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232 | rtems_interrupt_level level; |
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233 | |
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234 | /* |
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235 | * Issue a reset. |
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236 | */ |
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237 | *base = 0xf0; |
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238 | |
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239 | while (size) |
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240 | { |
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241 | rtems_interrupt_disable (level); |
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242 | *(base + 0xaaa) = 0xaa; |
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243 | *(base + 0x555) = 0x55; |
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244 | *(base + 0xaaa) = 0xa0; |
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245 | *seg = *data++; |
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246 | rtems_interrupt_enable (level); |
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247 | if (rtems_am29lv160_toggle_wait_8 (seg++) != 0) |
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248 | return EIO; |
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249 | size--; |
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250 | } |
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251 | |
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252 | /* |
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253 | * Issue a reset. |
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254 | */ |
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255 | *base = 0xf0; |
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256 | |
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257 | return 0; |
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258 | } |
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259 | |
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260 | static int |
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261 | rtems_am29lv160_write_data_16 (volatile uint16_t* base, |
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262 | uint32_t offset, |
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263 | const uint16_t* data, |
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264 | uint32_t size) |
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265 | { |
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266 | volatile uint16_t* seg = base + (offset / 2); |
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267 | rtems_interrupt_level level; |
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268 | |
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269 | size /= 2; |
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270 | |
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271 | /* |
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272 | * Issue a reset. |
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273 | */ |
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274 | *base = 0xf0; |
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275 | |
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276 | while (size) |
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277 | { |
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278 | rtems_interrupt_disable (level); |
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279 | *(base + 0x555) = 0xaa; |
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280 | *(base + 0x2aa) = 0x55; |
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281 | *(base + 0x555) = 0xa0; |
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282 | *seg = *data++; |
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283 | rtems_interrupt_enable (level); |
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284 | if (rtems_am29lv160_toggle_wait_16 (seg++) != 0) |
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285 | return EIO; |
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286 | size--; |
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287 | } |
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288 | |
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289 | /* |
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290 | * Issue a reset. |
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291 | */ |
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292 | *base = 0xf0; |
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293 | |
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294 | return 0; |
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295 | } |
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296 | |
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297 | static int |
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298 | rtems_am29lv160_read (const rtems_fdisk_segment_desc* sd, |
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299 | uint32_t device, |
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300 | uint32_t segment, |
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301 | uint32_t offset, |
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302 | void* buffer, |
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303 | uint32_t size) |
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304 | { |
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305 | unsigned char* addr = |
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306 | rtems_am29lv160_configuration[device].base + |
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307 | sd->offset + ((segment - sd->segment) * sd->size) + offset; |
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308 | memcpy (buffer, addr, size); |
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309 | return 0; |
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310 | } |
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311 | |
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312 | /* |
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313 | * @todo Fix the odd alignment and odd sizes. |
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314 | */ |
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315 | static int |
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316 | rtems_am29lv160_write (const rtems_fdisk_segment_desc* sd, |
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317 | uint32_t device, |
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318 | uint32_t segment, |
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319 | uint32_t offset, |
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320 | const void* buffer, |
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321 | uint32_t size) |
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322 | { |
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323 | int ret = rtems_am29lv160_verify (sd, device, segment, offset, buffer, size); |
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324 | |
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325 | if (ret != 0) |
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326 | { |
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327 | const rtems_am29lv160_config* ac = &rtems_am29lv160_configuration[device]; |
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328 | uint32_t soffset; |
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329 | |
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330 | soffset = offset + sd->offset + ((segment - sd->segment) * sd->size); |
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331 | |
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332 | if (offset & 1) |
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333 | printf ("rtems_am29lv160_write: offset is odd\n"); |
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334 | |
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335 | if (size & 1) |
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336 | printf ("rtems_am29lv160_write: size is odd\n"); |
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337 | |
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338 | if (ac->bus_8bit) |
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339 | ret = rtems_am29lv160_write_data_8 (ac->base, soffset, buffer, size); |
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340 | else |
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341 | ret = rtems_am29lv160_write_data_16 (ac->base, soffset, buffer, size); |
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342 | |
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343 | /* |
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344 | * Verify the write worked. |
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345 | */ |
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346 | if (ret == 0) |
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347 | { |
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348 | ret = rtems_am29lv160_verify (sd, device, segment, offset, buffer, size); |
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349 | #if AM26LV160_ERROR_TRACE |
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350 | if (ret) |
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351 | printf ("AM26LV160: verify failed: %ld-%ld-%08lx: s=%ld\n", |
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352 | device, segment, offset, size); |
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353 | #endif |
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354 | } |
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355 | } |
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356 | |
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357 | return ret; |
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358 | } |
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359 | |
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360 | static int |
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361 | rtems_am29lv160_erase (const rtems_fdisk_segment_desc* sd, |
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362 | uint32_t device, |
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363 | uint32_t segment) |
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364 | { |
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365 | int ret = rtems_am29lv160_blank (sd, device, segment, 0, sd->size); |
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366 | if (ret != 0) |
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367 | { |
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368 | const rtems_am29lv160_config* ac = &rtems_am29lv160_configuration[device]; |
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369 | uint32_t offset; |
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370 | rtems_interrupt_level level; |
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371 | |
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372 | offset = sd->offset + ((segment - sd->segment) * sd->size); |
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373 | |
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374 | if (ac->bus_8bit) |
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375 | { |
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376 | volatile uint8_t* base = ac->base; |
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377 | volatile uint8_t* seg = base + offset; |
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378 | |
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379 | /* |
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380 | * Issue a reset. |
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381 | */ |
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382 | rtems_interrupt_disable (level); |
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383 | *base = 0xf0; |
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384 | *(base + 0xaaa) = 0xaa; |
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385 | *(base + 0x555) = 0x55; |
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386 | *(base + 0xaaa) = 0x80; |
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387 | *(base + 0xaaa) = 0xaa; |
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388 | *(base + 0x555) = 0x55; |
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389 | *seg = 0x30; |
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390 | rtems_interrupt_enable (level); |
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391 | |
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392 | ret = rtems_am29lv160_toggle_wait_8 (seg); |
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393 | |
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394 | /* |
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395 | * Issue a reset. |
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396 | */ |
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397 | *base = 0xf0; |
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398 | } |
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399 | else |
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400 | { |
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401 | volatile uint16_t* base = ac->base; |
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402 | volatile uint16_t* seg = base + (offset / 2); |
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403 | |
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404 | /* |
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405 | * Issue a reset. |
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406 | */ |
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407 | rtems_interrupt_disable (level); |
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408 | *base = 0xf0; |
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409 | *(base + 0x555) = 0xaa; |
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410 | *(base + 0x2aa) = 0x55; |
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411 | *(base + 0x555) = 0x80; |
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412 | *(base + 0x555) = 0xaa; |
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413 | *(base + 0x2aa) = 0x55; |
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414 | *seg = 0x30; |
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415 | rtems_interrupt_enable (level); |
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416 | |
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417 | ret = rtems_am29lv160_toggle_wait_16 (seg); |
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418 | |
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419 | /* |
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420 | * Issue a reset. |
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421 | */ |
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422 | *base = 0xf0; |
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423 | } |
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424 | |
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425 | /* |
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426 | * Check the erase worked. |
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427 | */ |
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428 | if (ret == 0) |
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429 | { |
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430 | ret = rtems_am29lv160_blank (sd, device, segment, 0, sd->size); |
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431 | #if AM26LV160_ERROR_TRACE |
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432 | if (ret) |
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433 | printf ("AM26LV160: erase failed: %ld-%ld\n", device, segment); |
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434 | #endif |
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435 | } |
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436 | } |
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437 | |
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438 | return ret; |
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439 | } |
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440 | |
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441 | static int |
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442 | rtems_am29lv160_erase_device (const rtems_fdisk_device_desc* dd, |
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443 | uint32_t device) |
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444 | { |
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445 | uint32_t segment; |
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446 | |
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447 | for (segment = 0; segment < dd->segment_count; segment++) |
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448 | { |
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449 | uint32_t seg_segment; |
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450 | |
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451 | for (seg_segment = 0; |
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452 | seg_segment < dd->segments[segment].count; |
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453 | seg_segment++) |
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454 | { |
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455 | int ret = rtems_am29lv160_erase (&dd->segments[segment], |
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456 | device, |
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457 | segment + seg_segment); |
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458 | if (ret) |
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459 | return ret; |
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460 | } |
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461 | } |
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462 | |
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463 | return 0; |
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464 | } |
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465 | |
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466 | const rtems_fdisk_driver_handlers rtems_am29lv160_handlers = |
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467 | { |
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468 | .read = rtems_am29lv160_read, |
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469 | .write = rtems_am29lv160_write, |
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470 | .blank = rtems_am29lv160_blank, |
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471 | .verify = rtems_am29lv160_verify, |
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472 | .erase = rtems_am29lv160_erase, |
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473 | .erase_device = rtems_am29lv160_erase_device |
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474 | }; |
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