| 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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