| 1 | ; File name : Flash.asm |
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| 2 | ; Project name : XTIDE Universal BIOS Configurator v2 |
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| 3 | ; Created date : 1.12.2010 |
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| 4 | ; Last update : 3.12.2010 |
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| 5 | ; Author : Tomi Tilli |
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| 6 | ; Description : Functions for flashing the EEPROM. |
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| 7 | |
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| 8 | ; Section containing code |
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| 9 | SECTION .text |
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| 10 | |
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| 11 | ;-------------------------------------------------------------------- |
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| 12 | ; Flash_EepromWithFlashvarsInDSSI |
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| 13 | ; Parameters: |
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| 14 | ; DS:SI: Ptr to FLASHVARS |
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| 15 | ; Returns: |
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| 16 | ; FLASHVARS.flashResult |
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| 17 | ; Corrupts registers: |
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| 18 | ; All, including segments |
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| 19 | ;-------------------------------------------------------------------- |
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| 20 | ALIGN JUMP_ALIGN |
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| 21 | Flash_EepromWithFlashvarsInDSSI: |
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| 22 | mov [si+FLASHVARS.wProgressUpdateParam], bp ; Store handle to progress DIALOG |
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| 23 | mov bp, si ; Flashvars now in SS:BP |
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| 24 | mov cx, [bp+FLASHVARS.wPagesToFlash] |
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| 25 | ALIGN JUMP_ALIGN |
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| 26 | .FlashNextPage: |
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| 27 | call DisplayFlashProgressWithPagesLeftInCXandFlashvarsInSSBP |
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| 28 | call Flash_SinglePageWithFlashvarsInSSBP |
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| 29 | jc SHORT .PollingError |
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| 30 | call AreSourceAndDestinationPagesEqualFromFlashvarsInSSBP |
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| 31 | jne SHORT .DataVerifyError |
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| 32 | |
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| 33 | mov ax, [bp+FLASHVARS.wEepromPageSize] |
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| 34 | add [bp+FLASHVARS.fpNextSourcePage], ax |
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| 35 | add [bp+FLASHVARS.fpNextComparisonPage], ax |
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| 36 | add [bp+FLASHVARS.fpNextDestinationPage], ax |
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| 37 | |
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| 38 | loop .FlashNextPage |
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| 39 | mov BYTE [bp+FLASHVARS.flashResult], FLASH_RESULT.success |
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| 40 | ret |
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| 41 | |
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| 42 | .PollingError: |
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| 43 | mov BYTE [bp+FLASHVARS.flashResult], FLASH_RESULT.PollingTimeoutError |
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| 44 | ret |
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| 45 | .DataVerifyError: |
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| 46 | mov BYTE [bp+FLASHVARS.flashResult], FLASH_RESULT.DataVerifyError |
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| 47 | ret |
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| 48 | |
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| 49 | |
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| 50 | ;-------------------------------------------------------------------- |
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| 51 | ; Flash_SinglePageWithFlashvarsInSSBP |
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| 52 | ; Parameters: |
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| 53 | ; SS:BP: Ptr to FLASHVARS |
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| 54 | ; Returns: |
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| 55 | ; CF: Set if polling timeout error |
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| 56 | ; Cleared if page written successfully |
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| 57 | ; Corrupts registers: |
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| 58 | ; AX, BX, DX, SI, DI, DS, ES |
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| 59 | ;-------------------------------------------------------------------- |
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| 60 | ALIGN JUMP_ALIGN |
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| 61 | Flash_SinglePageWithFlashvarsInSSBP: |
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| 62 | cld |
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| 63 | call AreSourceAndDestinationPagesEqualFromFlashvarsInSSBP |
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| 64 | je SHORT .NoNeedToFlashThePage ; CF cleared |
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| 65 | |
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| 66 | push cx |
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| 67 | call .GetSdpCommandFunctionToDXwithFlashvarsInSSBP |
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| 68 | mov cx, [bp+FLASHVARS.wEepromPageSize] |
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| 69 | mov si, [bp+FLASHVARS.fpNextSourcePage] |
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| 70 | les di, [bp+FLASHVARS.fpNextComparisonPage] |
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| 71 | mov bx, [bp+FLASHVARS.fpNextDestinationPage] |
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| 72 | call WriteAllChangedBytesFromPageToEeprom |
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| 73 | pop cx |
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| 74 | .NoNeedToFlashThePage: |
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| 75 | ret |
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| 76 | |
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| 77 | ;-------------------------------------------------------------------- |
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| 78 | ; .GetSdpCommandFunctionToDXwithFlashvarsInSSBP |
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| 79 | ; Parameters: |
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| 80 | ; SS:BP: Ptr to FLASHVARS |
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| 81 | ; Returns: |
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| 82 | ; DX: Ptr to SDP Command function |
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| 83 | ; Corrupts registers: |
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| 84 | ; BX, SI |
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| 85 | ;-------------------------------------------------------------------- |
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| 86 | ALIGN JUMP_ALIGN |
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| 87 | .GetSdpCommandFunctionToDXwithFlashvarsInSSBP: |
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| 88 | eMOVZX bx, BYTE [bp+FLASHVARS.bEepromSdpCommand] |
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| 89 | mov si, [cs:bx+.rgpSdpCommandToEepromTypeLookupTable] |
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| 90 | mov bl, [bp+FLASHVARS.bEepromType] |
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| 91 | mov dx, [cs:bx+si] |
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| 92 | ret |
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| 93 | |
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| 94 | ALIGN WORD_ALIGN |
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| 95 | .rgpSdpCommandToEepromTypeLookupTable: |
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| 96 | dw .rgfnFlashWithoutSDP ; SDP_COMMAND.none |
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| 97 | dw .rgfnEnableSdpAndFlash ; SDP_COMMAND.enable |
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| 98 | dw .rgfnDisableSdpAndFlash ; SDP_COMMAND.disable |
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| 99 | .rgfnFlashWithoutSDP: ; SDP_COMMAND.none |
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| 100 | dw DoNotWriteAnySdpCommand ; EEPROM_TYPE.2816_2kiB |
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| 101 | dw DoNotWriteAnySdpCommand ; EEPROM_TYPE.2864_8kiB |
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| 102 | dw DoNotWriteAnySdpCommand ; EEPROM_TYPE.28256_32kiB |
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| 103 | dw DoNotWriteAnySdpCommand ; EEPROM_TYPE.28512_64kiB |
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| 104 | .rgfnEnableSdpAndFlash: ; SDP_COMMAND.enable |
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| 105 | dw WriteSdpEnableCommandFor2816 ; EEPROM_TYPE.2816_2kiB |
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| 106 | dw WriteSdpEnableCommandFor2864 ; EEPROM_TYPE.2864_8kiB |
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| 107 | dw WriteSdpEnableCommandFor28256or28512 ; EEPROM_TYPE.28256_32kiB |
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| 108 | dw WriteSdpEnableCommandFor28256or28512 ; EEPROM_TYPE.28512_64kiB |
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| 109 | .rgfnDisableSdpAndFlash: ; SDP_COMMAND.disable |
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| 110 | dw WriteSdpDisableCommandFor2816 ; EEPROM_TYPE.2816_2kiB |
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| 111 | dw WriteSdpDisableCommandFor2864 ; EEPROM_TYPE.2864_8kiB |
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| 112 | dw WriteSdpDisableCommandFor28256or28512 ; EEPROM_TYPE.28256_32kiB |
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| 113 | dw WriteSdpDisableCommandFor28256or28512 ; EEPROM_TYPE.28512_64kiB |
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| 114 | |
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| 115 | |
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| 116 | ;-------------------------------------------------------------------- |
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| 117 | ; AreSourceAndDestinationPagesEqualFromFlashvarsInSSBP |
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| 118 | ; Parameters: |
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| 119 | ; SS:BP: Ptr to FLASHVARS |
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| 120 | ; Returns: |
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| 121 | ; ZF: Set if pages are equal |
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| 122 | ; Cleared if pages are not equal |
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| 123 | ; Corrupts registers: |
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| 124 | ; SI, DI |
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| 125 | ;-------------------------------------------------------------------- |
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| 126 | ALIGN JUMP_ALIGN |
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| 127 | AreSourceAndDestinationPagesEqualFromFlashvarsInSSBP: |
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| 128 | push cx |
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| 129 | mov cx, [bp+FLASHVARS.wEepromPageSize] |
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| 130 | lds si, [bp+FLASHVARS.fpNextSourcePage] |
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| 131 | les di, [bp+FLASHVARS.fpNextDestinationPage] |
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| 132 | repe cmpsb |
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| 133 | pop cx |
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| 134 | ret |
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| 135 | |
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| 136 | |
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| 137 | ;-------------------------------------------------------------------- |
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| 138 | ; ENABLE_SDP |
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| 139 | ; Parameters: |
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| 140 | ; %1: Offset for first command byte |
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| 141 | ; %2: Offset for second command byte |
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| 142 | ; DS: Segment to beginning of EEPROM |
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| 143 | ; Returns: |
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| 144 | ; Nothing |
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| 145 | ; Corrupts registers: |
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| 146 | ; Nothing |
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| 147 | ;-------------------------------------------------------------------- |
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| 148 | %macro ENABLE_SDP 2 |
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| 149 | mov BYTE [%1], 0AAh |
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| 150 | mov BYTE [%2], 55h |
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| 151 | mov BYTE [%1], 0A0h |
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| 152 | %endmacro |
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| 153 | |
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| 154 | ;-------------------------------------------------------------------- |
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| 155 | ; DISABLE_SDP |
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| 156 | ; Parameters: |
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| 157 | ; %1: Offset for first command byte |
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| 158 | ; %2: Offset for second command byte |
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| 159 | ; DS: Segment to beginning of EEPROM |
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| 160 | ; Returns: |
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| 161 | ; Nothing |
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| 162 | ; Corrupts registers: |
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| 163 | ; Nothing |
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| 164 | ;-------------------------------------------------------------------- |
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| 165 | %macro DISABLE_SDP 2 |
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| 166 | mov BYTE [%1], 0AAh |
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| 167 | mov BYTE [%2], 55h |
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| 168 | mov BYTE [%1], 80h |
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| 169 | mov BYTE [%1], 0AAh |
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| 170 | mov BYTE [%2], 55h |
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| 171 | mov BYTE [%1], 20h |
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| 172 | %endmacro |
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| 173 | |
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| 174 | ;-------------------------------------------------------------------- |
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| 175 | ; SDP Command Functions |
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| 176 | ; Parameters: |
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| 177 | ; DS: Segment to beginning of EEPROM |
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| 178 | ; Returns: |
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| 179 | ; Nothing but jumps to WriteActualDataByteAfterSdpCommand |
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| 180 | ; Corrupts registers: |
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| 181 | ; Nothing |
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| 182 | ;-------------------------------------------------------------------- |
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| 183 | ALIGN JUMP_ALIGN |
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| 184 | WriteSdpEnableCommandFor2816: |
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| 185 | ENABLE_SDP 555h, 2AAh |
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| 186 | jmp ReturnFromSdpCommand |
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| 187 | |
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| 188 | ALIGN JUMP_ALIGN |
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| 189 | WriteSdpEnableCommandFor2864: |
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| 190 | ENABLE_SDP 1555h, 0AAAh |
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| 191 | jmp SHORT ReturnFromSdpCommand |
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| 192 | |
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| 193 | ALIGN JUMP_ALIGN |
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| 194 | WriteSdpEnableCommandFor28256or28512: |
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| 195 | ENABLE_SDP 5555h, 2AAAh |
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| 196 | jmp SHORT ReturnFromSdpCommand |
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| 197 | |
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| 198 | |
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| 199 | ALIGN JUMP_ALIGN |
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| 200 | WriteSdpDisableCommandFor2816: |
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| 201 | DISABLE_SDP 555h, 2AAh |
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| 202 | jmp SHORT ReturnFromSdpCommand |
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| 203 | |
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| 204 | ALIGN JUMP_ALIGN |
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| 205 | WriteSdpDisableCommandFor2864: |
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| 206 | DISABLE_SDP 1555h, 0AAAh |
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| 207 | jmp SHORT ReturnFromSdpCommand |
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| 208 | |
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| 209 | ALIGN JUMP_ALIGN |
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| 210 | WriteSdpDisableCommandFor28256or28512: |
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| 211 | DISABLE_SDP 5555h, 2AAAh |
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| 212 | DoNotWriteAnySdpCommand: |
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| 213 | jmp SHORT ReturnFromSdpCommand |
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| 214 | |
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| 215 | |
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| 216 | ;-------------------------------------------------------------------- |
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| 217 | ; WriteNextChangedByteFromPageToEeprom |
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| 218 | ; Parameters: |
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| 219 | ; CX: Number of bytes left to write |
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| 220 | ; DX: Offset to SDP command function |
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| 221 | ; BX: Offset to next destination byte |
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| 222 | ; SI: Offset to next source byte |
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| 223 | ; ES:DI: Ptr to next comparison byte |
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| 224 | ; SS:BP: Ptr to FLASHVARS |
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| 225 | ; Returns: |
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| 226 | ; CF: Set if polling timeout error |
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| 227 | ; Cleared if page written successfully |
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| 228 | ; Corrupts registers: |
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| 229 | ; AX, BX, CX, SI, DI, DS, ES |
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| 230 | ;-------------------------------------------------------------------- |
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| 231 | ALIGN JUMP_ALIGN |
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| 232 | WriteAllChangedBytesFromPageToEeprom: |
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| 233 | mov ax, [bp+FLASHVARS.fpNextSourcePage+2] ; AX = Source segment |
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| 234 | mov ds, [bp+FLASHVARS.fpNextDestinationPage+2] ; DS = EEPROM segment |
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| 235 | cli ; Disable interrupts |
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| 236 | jmp dx ; Write SDP command (once to the beginning of page) |
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| 237 | ALIGN JUMP_ALIGN |
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| 238 | ReturnFromSdpCommand: |
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| 239 | mov ds, ax ; DS:SI now points to source byte |
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| 240 | |
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| 241 | ALIGN JUMP_ALIGN |
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| 242 | .WriteActualDataByteAfterSdpCommand: |
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| 243 | lodsb ; Load source byte to AL |
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| 244 | scasb ; Compare source byte to comparison byte |
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| 245 | je SHORT .NoChangesForThisByte |
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| 246 | |
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| 247 | mov ds, [bp+FLASHVARS.fpNextDestinationPage+2] ; DS:BX now points to EEPROM |
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| 248 | mov [bx], al ; Write byte to EEPROM |
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| 249 | mov ds, [bp+FLASHVARS.fpNextSourcePage+2] ; Restore DS |
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| 250 | mov [bp+FLASHVARS.wLastOffsetWritten], bx |
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| 251 | mov [bp+FLASHVARS.bLastByteWritten], al |
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| 252 | |
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| 253 | ALIGN JUMP_ALIGN |
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| 254 | .NoChangesForThisByte: |
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| 255 | inc bx ; Increment destination offset |
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| 256 | loop .WriteActualDataByteAfterSdpCommand |
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| 257 | sti ; Enable interrupts |
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| 258 | ; Fall to WaitUntilEepromPageWriteHasCompleted |
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| 259 | |
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| 260 | |
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| 261 | ;-------------------------------------------------------------------- |
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| 262 | ; WaitUntilEepromPageWriteHasCompleted |
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| 263 | ; Parameters: |
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| 264 | ; SS:BP: Ptr to FLASHVARS |
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| 265 | ; Returns: |
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| 266 | ; CF: Set if polling timeout error |
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| 267 | ; Cleared if page written successfully |
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| 268 | ; Corrupts registers: |
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| 269 | ; AX, BX, DI, DS, ES |
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| 270 | ;-------------------------------------------------------------------- |
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| 271 | ALIGN JUMP_ALIGN |
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| 272 | WaitUntilEepromPageWriteHasCompleted: |
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| 273 | call .InitializeTimeoutCounterForEepromPollingWithFlashvarsInSSBP |
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| 274 | mov es, [bp+FLASHVARS.fpNextDestinationPage+2] |
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| 275 | mov di, [bp+FLASHVARS.wLastOffsetWritten] |
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| 276 | ALIGN JUMP_ALIGN |
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| 277 | .PollEeprom: |
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| 278 | call .HasWriteCycleCompleted |
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| 279 | je SHORT .PageWriteCompleted ; CF cleared |
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| 280 | call TimerTicks_GetTimeoutTicksLeftToAXfromDSBX |
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| 281 | jnc SHORT .PollEeprom |
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| 282 | ALIGN JUMP_ALIGN |
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| 283 | .PageWriteCompleted: |
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| 284 | ret |
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| 285 | |
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| 286 | ;-------------------------------------------------------------------- |
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| 287 | ; .InitializeTimeoutCounterForEepromPollingWithFlashvarsInSSBP |
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| 288 | ; Parameters: |
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| 289 | ; SS:BP: Ptr to FLASHVARS |
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| 290 | ; Returns: |
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| 291 | ; DS:BX: Ptr to timeout counter variable |
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| 292 | ; Corrupts registers: |
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| 293 | ; AX |
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| 294 | ;-------------------------------------------------------------------- |
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| 295 | ALIGN JUMP_ALIGN |
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| 296 | .InitializeTimeoutCounterForEepromPollingWithFlashvarsInSSBP: |
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| 297 | push ss |
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| 298 | pop ds |
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| 299 | lea bx, [bp+FLASHVARS.wTimeoutCounter] |
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| 300 | mov ax, EEPROM_POLLING_TIMEOUT_TICKS |
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| 301 | jmp TimerTicks_InitializeTimeoutFromAX |
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| 302 | |
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| 303 | ;-------------------------------------------------------------------- |
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| 304 | ; .HasWriteCycleCompleted |
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| 305 | ; Parameters: |
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| 306 | ; ES:DI: Ptr to last written byte in EEPROM |
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| 307 | ; SS:BP: Ptr to FLASHVARS |
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| 308 | ; Returns: |
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| 309 | ; ZF: Set if write cycle has completed |
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| 310 | ; Cleared if write cycle in progress |
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| 311 | ; Corrupts registers: |
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| 312 | ; AX |
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| 313 | ;-------------------------------------------------------------------- |
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| 314 | ALIGN JUMP_ALIGN |
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| 315 | .HasWriteCycleCompleted: |
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| 316 | mov ah, [es:di] ; Load byte from EEPROM |
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| 317 | mov al, [bp+FLASHVARS.bLastByteWritten] |
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| 318 | and ax, 8080h ; Clear all but bit 7 from both bytes |
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| 319 | cmp al, ah ; Set ZF if high bits are the same |
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| 320 | ret |
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| 321 | |
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| 322 | |
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| 323 | ;-------------------------------------------------------------------- |
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| 324 | ; DisplayFlashProgressWithPagesLeftInCXandFlashvarsInSSBP |
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| 325 | ; Parameters: |
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| 326 | ; CX: Number of pages left to flash |
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| 327 | ; SS:BP: Ptr to FLASHVARS |
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| 328 | ; Returns: |
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| 329 | ; Nothing |
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| 330 | ; Corrupts registers: |
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| 331 | ; AX, DI |
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| 332 | ;-------------------------------------------------------------------- |
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| 333 | ALIGN JUMP_ALIGN |
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| 334 | DisplayFlashProgressWithPagesLeftInCXandFlashvarsInSSBP: |
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| 335 | push bp |
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| 336 | |
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| 337 | mov ax, [bp+FLASHVARS.wPagesToFlash] |
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| 338 | sub ax, cx |
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| 339 | mov bp, [bp+FLASHVARS.wProgressUpdateParam] ; BP now has MENU handle |
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| 340 | CALL_MENU_LIBRARY SetProgressValueFromAX |
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| 341 | |
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| 342 | pop bp |
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| 343 | ret |
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