1 | ; Project name : XTIDE Universal BIOS Configurator v2
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2 | ; Description : Functions for flashing the EEPROM.
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3 |
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4 | ;
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5 | ; XTIDE Universal BIOS and Associated Tools
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6 | ; Copyright (C) 2009-2010 by Tomi Tilli, 2011-2012 by XTIDE Universal BIOS Team.
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7 | ;
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8 | ; This program is free software; you can redistribute it and/or modify
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9 | ; it under the terms of the GNU General Public License as published by
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10 | ; the Free Software Foundation; either version 2 of the License, or
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11 | ; (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 | ; Visit http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
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18 | ;
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19 |
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20 | ; Section containing code
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21 | SECTION .text
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22 |
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23 | ;--------------------------------------------------------------------
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24 | ; Flash_EepromWithFlashvarsInDSSI
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25 | ; Parameters:
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26 | ; DS:SI: Ptr to FLASHVARS
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27 | ; Returns:
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28 | ; FLASHVARS.flashResult
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29 | ; Corrupts registers:
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30 | ; All, including segments
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31 | ;--------------------------------------------------------------------
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32 | ALIGN JUMP_ALIGN
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33 | Flash_EepromWithFlashvarsInDSSI:
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34 | mov [si+FLASHVARS.wProgressUpdateParam], bp ; Store handle to progress DIALOG
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35 | mov bp, si ; Flashvars now in SS:BP
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36 | mov cx, [bp+FLASHVARS.wPagesToFlash]
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37 | ALIGN JUMP_ALIGN
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38 | .FlashNextPage:
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39 | call DisplayFlashProgressWithPagesLeftInCXandFlashvarsInSSBP
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40 | call Flash_SinglePageWithFlashvarsInSSBP
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41 | jc SHORT .PollingError
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42 | call AreSourceAndDestinationPagesEqualFromFlashvarsInSSBP
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43 | jne SHORT .DataVerifyError
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44 |
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45 | mov ax, [bp+FLASHVARS.wEepromPageSize]
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46 | add [bp+FLASHVARS.fpNextSourcePage], ax
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47 | add [bp+FLASHVARS.fpNextComparisonPage], ax
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48 | add [bp+FLASHVARS.fpNextDestinationPage], ax
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49 |
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50 | loop .FlashNextPage
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51 | %ifndef CHECK_FOR_UNUSED_ENTRYPOINTS
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52 | %if FLASH_RESULT.success = 0 ; Just in case this should ever change
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53 | mov [bp+FLASHVARS.flashResult], cl
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54 | %else
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55 | mov BYTE [bp+FLASHVARS.flashResult], FLASH_RESULT.success
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56 | %endif
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57 | %endif
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58 | ret
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59 |
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60 | .PollingError:
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61 | mov BYTE [bp+FLASHVARS.flashResult], FLASH_RESULT.PollingTimeoutError
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62 | ret
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63 | .DataVerifyError:
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64 | mov BYTE [bp+FLASHVARS.flashResult], FLASH_RESULT.DataVerifyError
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65 | ret
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66 |
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67 |
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68 | ;--------------------------------------------------------------------
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69 | ; Flash_SinglePageWithFlashvarsInSSBP
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70 | ; Parameters:
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71 | ; SS:BP: Ptr to FLASHVARS
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72 | ; Returns:
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73 | ; CF: Set if polling timeout error
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74 | ; Cleared if page written successfully
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75 | ; Corrupts registers:
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76 | ; AX, BX, DX, SI, DI, DS, ES
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77 | ;--------------------------------------------------------------------
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78 | ALIGN JUMP_ALIGN
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79 | Flash_SinglePageWithFlashvarsInSSBP:
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80 | cld
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81 | call AreSourceAndDestinationPagesEqualFromFlashvarsInSSBP
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82 | je SHORT .NoNeedToFlashThePage ; CF cleared
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83 |
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84 | push cx
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85 | call .GetSdpCommandFunctionToDXwithFlashvarsInSSBP
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86 | mov cx, [bp+FLASHVARS.wEepromPageSize]
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87 | mov si, [bp+FLASHVARS.fpNextSourcePage]
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88 | les di, [bp+FLASHVARS.fpNextComparisonPage]
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89 | mov bx, [bp+FLASHVARS.fpNextDestinationPage]
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90 | call WriteAllChangedBytesFromPageToEeprom
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91 | pop cx
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92 | .NoNeedToFlashThePage:
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93 | ret
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94 |
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95 | ;--------------------------------------------------------------------
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96 | ; .GetSdpCommandFunctionToDXwithFlashvarsInSSBP
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97 | ; Parameters:
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98 | ; SS:BP: Ptr to FLASHVARS
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99 | ; Returns:
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100 | ; DX: Ptr to SDP Command function
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101 | ; Corrupts registers:
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102 | ; BX, SI
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103 | ;--------------------------------------------------------------------
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104 | ALIGN JUMP_ALIGN
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105 | .GetSdpCommandFunctionToDXwithFlashvarsInSSBP:
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106 | eMOVZX bx, [bp+FLASHVARS.bEepromSdpCommand]
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107 | mov si, [cs:bx+.rgpSdpCommandToEepromTypeLookupTable]
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108 | mov bl, [bp+FLASHVARS.bEepromType]
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109 | mov dx, [cs:bx+si]
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110 | ret
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111 |
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112 | ALIGN WORD_ALIGN
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113 | .rgpSdpCommandToEepromTypeLookupTable:
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114 | dw .rgfnFlashWithoutSDP ; SDP_COMMAND.none
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115 | dw .rgfnEnableSdpAndFlash ; SDP_COMMAND.enable
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116 | dw .rgfnDisableSdpAndFlash ; SDP_COMMAND.disable
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117 | .rgfnFlashWithoutSDP: ; SDP_COMMAND.none
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118 | dw DoNotWriteAnySdpCommand ; EEPROM_TYPE.2816_2kiB
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119 | dw DoNotWriteAnySdpCommand ; EEPROM_TYPE.2864_8kiB
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120 | dw DoNotWriteAnySdpCommand ; EEPROM_TYPE.2864_8kiB_MOD
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121 | dw DoNotWriteAnySdpCommand ; EEPROM_TYPE.28256_32kiB
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122 | dw DoNotWriteAnySdpCommand ; EEPROM_TYPE.28512_64kiB
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123 | .rgfnEnableSdpAndFlash: ; SDP_COMMAND.enable
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124 | dw WriteSdpEnableCommandFor2816 ; EEPROM_TYPE.2816_2kiB
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125 | dw WriteSdpEnableCommandFor2864 ; EEPROM_TYPE.2864_8kiB
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126 | dw WriteSdpEnableCommandFor2864mod ; EEPROM_TYPE.2864_8kiB_MOD
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127 | dw WriteSdpEnableCommandFor28256or28512 ; EEPROM_TYPE.28256_32kiB
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128 | dw WriteSdpEnableCommandFor28256or28512 ; EEPROM_TYPE.28512_64kiB
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129 | .rgfnDisableSdpAndFlash: ; SDP_COMMAND.disable
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130 | dw WriteSdpDisableCommandFor2816 ; EEPROM_TYPE.2816_2kiB
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131 | dw WriteSdpDisableCommandFor2864 ; EEPROM_TYPE.2864_8kiB
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132 | dw WriteSdpDisableCommandFor2864mod ; EEPROM_TYPE.2864_8kiB_MOD
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133 | dw WriteSdpDisableCommandFor28256or28512 ; EEPROM_TYPE.28256_32kiB
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134 | dw WriteSdpDisableCommandFor28256or28512 ; EEPROM_TYPE.28512_64kiB
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135 |
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136 |
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137 | ;--------------------------------------------------------------------
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138 | ; AreSourceAndDestinationPagesEqualFromFlashvarsInSSBP
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139 | ; Parameters:
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140 | ; SS:BP: Ptr to FLASHVARS
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141 | ; Returns:
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142 | ; ZF: Set if pages are equal
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143 | ; Cleared if pages are not equal
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144 | ; Corrupts registers:
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145 | ; SI, DI
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146 | ;--------------------------------------------------------------------
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147 | ALIGN JUMP_ALIGN
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148 | AreSourceAndDestinationPagesEqualFromFlashvarsInSSBP:
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149 | push cx
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150 | mov cx, [bp+FLASHVARS.wEepromPageSize]
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151 | lds si, [bp+FLASHVARS.fpNextSourcePage]
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152 | les di, [bp+FLASHVARS.fpNextDestinationPage]
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153 | repe cmpsb
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154 | pop cx
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155 | ret
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156 |
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157 |
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158 | ;--------------------------------------------------------------------
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159 | ; ENABLE_SDP
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160 | ; Parameters:
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161 | ; %1: Offset for first command byte
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162 | ; %2: Offset for second command byte
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163 | ; DS: Segment to beginning of EEPROM
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164 | ; Returns:
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165 | ; Nothing
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166 | ; Corrupts registers:
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167 | ; Nothing
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168 | ;--------------------------------------------------------------------
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169 | %macro ENABLE_SDP 2
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170 | mov BYTE [%1], 0AAh
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171 | mov BYTE [%2], 55h
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172 | mov BYTE [%1], 0A0h
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173 | %endmacro
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174 |
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175 | ;--------------------------------------------------------------------
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176 | ; DISABLE_SDP
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177 | ; Parameters:
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178 | ; %1: Offset for first command byte
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179 | ; %2: Offset for second command byte
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180 | ; DS: Segment to beginning of EEPROM
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181 | ; Returns:
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182 | ; Nothing
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183 | ; Corrupts registers:
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184 | ; Nothing
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185 | ;--------------------------------------------------------------------
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186 | %macro DISABLE_SDP 2
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187 | mov BYTE [%1], 0AAh
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188 | mov BYTE [%2], 55h
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189 | mov BYTE [%1], 80h
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190 | mov BYTE [%1], 0AAh
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191 | mov BYTE [%2], 55h
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192 | mov BYTE [%1], 20h
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193 | %endmacro
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194 |
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195 | ;--------------------------------------------------------------------
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196 | ; SDP Command Functions
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197 | ; Parameters:
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198 | ; DS: Segment to beginning of EEPROM
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199 | ; Returns:
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200 | ; Nothing but jumps to WriteActualDataByteAfterSdpCommand
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201 | ; Corrupts registers:
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202 | ; Nothing
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203 | ;--------------------------------------------------------------------
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204 | ALIGN JUMP_ALIGN
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205 | WriteSdpEnableCommandFor2816:
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206 | ENABLE_SDP 555h, 2AAh
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207 | jmp ReturnFromSdpCommand
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208 |
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209 | ALIGN JUMP_ALIGN
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210 | WriteSdpEnableCommandFor2864:
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211 | ENABLE_SDP 1555h, 0AAAh
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212 | jmp ReturnFromSdpCommand
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213 |
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214 | ALIGN JUMP_ALIGN
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215 | WriteSdpEnableCommandFor2864mod:
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216 | ENABLE_SDP 155Ch, 0AA3h
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217 | jmp ReturnFromSdpCommand
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218 |
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219 | ALIGN JUMP_ALIGN
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220 | WriteSdpEnableCommandFor28256or28512:
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221 | ENABLE_SDP 5555h, 2AAAh
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222 | jmp ReturnFromSdpCommand
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223 |
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224 |
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225 | ALIGN JUMP_ALIGN
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226 | WriteSdpDisableCommandFor2816:
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227 | DISABLE_SDP 555h, 2AAh
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228 | jmp SHORT ReturnFromSdpCommand
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229 |
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230 | ALIGN JUMP_ALIGN
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231 | WriteSdpDisableCommandFor2864:
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232 | DISABLE_SDP 1555h, 0AAAh
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233 | jmp SHORT ReturnFromSdpCommand
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234 |
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235 | ALIGN JUMP_ALIGN
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236 | WriteSdpDisableCommandFor2864mod:
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237 | DISABLE_SDP 155Ch, 0AA3h
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238 | jmp SHORT ReturnFromSdpCommand
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239 |
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240 | ALIGN JUMP_ALIGN
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241 | WriteSdpDisableCommandFor28256or28512:
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242 | DISABLE_SDP 5555h, 2AAAh
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243 | DoNotWriteAnySdpCommand:
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244 | jmp SHORT ReturnFromSdpCommand
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245 |
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246 |
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247 | ;--------------------------------------------------------------------
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248 | ; WriteNextChangedByteFromPageToEeprom
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249 | ; Parameters:
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250 | ; CX: Number of bytes left to write
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251 | ; DX: Offset to SDP command function
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252 | ; BX: Offset to next destination byte
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253 | ; SI: Offset to next source byte
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254 | ; ES:DI: Ptr to next comparison byte
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255 | ; SS:BP: Ptr to FLASHVARS
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256 | ; Returns:
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257 | ; CF: Set if polling timeout error
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258 | ; Cleared if page written successfully
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259 | ; Corrupts registers:
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260 | ; AX, BX, CX, SI, DI, DS, ES
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261 | ;--------------------------------------------------------------------
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262 | ALIGN JUMP_ALIGN
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263 | WriteAllChangedBytesFromPageToEeprom:
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264 | mov ax, [bp+FLASHVARS.fpNextSourcePage+2] ; AX = Source segment
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265 | mov ds, [bp+FLASHVARS.fpNextDestinationPage+2] ; DS = EEPROM segment
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266 | cli ; Disable interrupts
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267 | jmp dx ; Write SDP command (once to the beginning of page)
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268 | ALIGN JUMP_ALIGN
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269 | ReturnFromSdpCommand:
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270 | mov ds, ax ; DS:SI now points to source byte
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271 |
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272 | ALIGN JUMP_ALIGN
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273 | .WriteActualDataByteAfterSdpCommand:
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274 | lodsb ; Load source byte to AL
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275 | scasb ; Compare source byte to comparison byte
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276 | je SHORT .NoChangesForThisByte
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277 |
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278 | mov ds, [bp+FLASHVARS.fpNextDestinationPage+2] ; DS:BX now points to EEPROM
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279 | mov [bx], al ; Write byte to EEPROM
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280 | mov ds, [bp+FLASHVARS.fpNextSourcePage+2] ; Restore DS
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281 | mov [bp+FLASHVARS.wLastOffsetWritten], bx
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282 | mov [bp+FLASHVARS.bLastByteWritten], al
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283 |
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284 | ALIGN JUMP_ALIGN
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285 | .NoChangesForThisByte:
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286 | inc bx ; Increment destination offset
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287 | loop .WriteActualDataByteAfterSdpCommand
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288 | sti ; Enable interrupts
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289 | ; Fall to WaitUntilEepromPageWriteHasCompleted
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290 |
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291 |
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292 | ;--------------------------------------------------------------------
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293 | ; WaitUntilEepromPageWriteHasCompleted
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294 | ; Parameters:
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295 | ; SS:BP: Ptr to FLASHVARS
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296 | ; Returns:
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297 | ; CF: Set if polling timeout error
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298 | ; Cleared if page written successfully
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299 | ; Corrupts registers:
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300 | ; AX, BX, DI, DS, ES
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301 | ;--------------------------------------------------------------------
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302 | ALIGN JUMP_ALIGN
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303 | WaitUntilEepromPageWriteHasCompleted:
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304 | call .InitializeTimeoutCounterForEepromPollingWithFlashvarsInSSBP
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305 | mov es, [bp+FLASHVARS.fpNextDestinationPage+2]
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306 | mov di, [bp+FLASHVARS.wLastOffsetWritten]
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307 | ALIGN JUMP_ALIGN
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308 | .PollEeprom:
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309 | call .HasWriteCycleCompleted
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310 | je SHORT .PageWriteCompleted ; CF cleared
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311 | call TimerTicks_GetTimeoutTicksLeftToAXfromDSBX
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312 | jnc SHORT .PollEeprom
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313 | ALIGN JUMP_ALIGN
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314 | .PageWriteCompleted:
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315 | ret
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316 |
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317 | ;--------------------------------------------------------------------
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318 | ; .InitializeTimeoutCounterForEepromPollingWithFlashvarsInSSBP
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319 | ; Parameters:
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320 | ; SS:BP: Ptr to FLASHVARS
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321 | ; Returns:
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322 | ; DS:BX: Ptr to timeout counter variable
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323 | ; Corrupts registers:
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324 | ; AX
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325 | ;--------------------------------------------------------------------
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326 | ALIGN JUMP_ALIGN
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327 | .InitializeTimeoutCounterForEepromPollingWithFlashvarsInSSBP:
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328 | push ss
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329 | pop ds
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330 | lea bx, [bp+FLASHVARS.wTimeoutCounter]
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331 | mov ax, EEPROM_POLLING_TIMEOUT_TICKS
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332 | jmp TimerTicks_InitializeTimeoutFromAX
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333 |
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334 | ;--------------------------------------------------------------------
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335 | ; .HasWriteCycleCompleted
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336 | ; Parameters:
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337 | ; ES:DI: Ptr to last written byte in EEPROM
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338 | ; SS:BP: Ptr to FLASHVARS
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339 | ; Returns:
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340 | ; ZF: Set if write cycle has completed
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341 | ; Cleared if write cycle in progress
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342 | ; Corrupts registers:
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343 | ; AX
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344 | ;--------------------------------------------------------------------
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345 | ALIGN JUMP_ALIGN
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346 | .HasWriteCycleCompleted:
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347 | mov ah, [es:di] ; Load byte from EEPROM
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348 | mov al, [bp+FLASHVARS.bLastByteWritten]
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349 | and ax, 8080h ; Clear all but bit 7 from both bytes
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350 | cmp al, ah ; Set ZF if high bits are the same
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351 | ret
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352 |
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353 |
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354 | ;--------------------------------------------------------------------
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355 | ; DisplayFlashProgressWithPagesLeftInCXandFlashvarsInSSBP
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356 | ; Parameters:
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357 | ; CX: Number of pages left to flash
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358 | ; SS:BP: Ptr to FLASHVARS
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359 | ; Returns:
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360 | ; Nothing
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361 | ; Corrupts registers:
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362 | ; AX, DI
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363 | ;--------------------------------------------------------------------
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364 | ALIGN JUMP_ALIGN
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365 | DisplayFlashProgressWithPagesLeftInCXandFlashvarsInSSBP:
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366 | push bp
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367 |
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368 | mov ax, [bp+FLASHVARS.wPagesToFlash]
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369 | sub ax, cx
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370 | mov bp, [bp+FLASHVARS.wProgressUpdateParam] ; BP now has MENU handle
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371 | CALL_MENU_LIBRARY SetProgressValueFromAX
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372 |
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373 | pop bp
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374 | ret
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