1 | ; Project name : XTIDE Universal BIOS
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2 | ; Description : Int 13h function AH=9h, Initialize Drive Parameters.
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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, 2011-2013 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 | ; STORE_ERROR_FLAG_TO_DPT
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25 | ; Parameters:
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26 | ; %1: Error flag to set
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27 | ; AH: BIOS Error Code
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28 | ; DS:DI: Ptr to DPT
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29 | ; CF: Set if error code in AH
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30 | ; Returns:
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31 | ; CF: Clear if no error
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32 | ; Set if error flag was set
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33 | ; Corrupts registers:
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34 | ; Nothing
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35 | ;--------------------------------------------------------------------
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36 | %macro STORE_ERROR_FLAG_TO_DPT 1
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37 | mov al, %1
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38 | call SetErrorFlagFromALwithErrorCodeInAH
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39 | %endmacro
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40 |
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41 |
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42 | ;--------------------------------------------------------------------
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43 | ; Int 13h function AH=9h, Initialize Drive Parameters.
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44 | ;
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45 | ; AH9h_HandlerForInitializeDriveParameters
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46 | ; Parameters:
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47 | ; DL: Translated Drive number
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48 | ; DS:DI: Ptr to DPT (in RAMVARS segment)
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49 | ; SS:BP: Ptr to IDEPACK
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50 | ; Returns with INTPACK:
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51 | ; AH: Int 13h return status
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52 | ; CF: 0 if successful, 1 if error
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53 | ;--------------------------------------------------------------------
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54 | AH9h_HandlerForInitializeDriveParameters:
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55 | %ifndef USE_186
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56 | call AH9h_InitializeDriveForUse
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57 | jmp Int13h_ReturnFromHandlerAfterStoringErrorCodeFromAH
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58 | %else
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59 | push Int13h_ReturnFromHandlerAfterStoringErrorCodeFromAH
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60 | ; Fall to AH9h_InitializeDriveForUse
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61 | %endif
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62 |
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63 |
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64 | ;--------------------------------------------------------------------
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65 | ; Initialize drive to be ready for use.
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66 | ;
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67 | ; AH9h_InitializeDriveForUse
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68 | ; Parameters:
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69 | ; DS:DI: Ptr to DPT (in RAMVARS segment)
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70 | ; SS:BP: Ptr to IDEPACK
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71 | ; Returns:
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72 | ; AH: Int 13h return status
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73 | ; CF: 0 if successful, 1 if error
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74 | ; Corrupts registers:
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75 | ; AL, CX
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76 | ;--------------------------------------------------------------------
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77 | AH9h_InitializeDriveForUse:
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78 | xor ax, ax ; Clear AH to assume no errors
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79 |
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80 | %ifdef MODULE_ADVANCED_ATA
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81 | ; Clear Initialization Error flags from DPT
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82 | mov [di+DPT.bInitError], al
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83 | %endif
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84 |
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85 | %ifdef MODULE_SERIAL
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86 | ; No need to do this for serial devices
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87 | test BYTE [di+DPT.bFlagsHigh], FLGH_DPT_SERIAL_DEVICE ; Clears CF
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88 | jz SHORT .ContinueInitialization
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89 | ret ; With AH and CF cleared
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90 | .ContinueInitialization:
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91 | %endif
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92 |
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93 | push es
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94 | push si
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95 | push dx
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96 | push bx
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97 |
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98 |
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99 | ;;; SelectDrive
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100 | ; Try to select drive and wait until ready
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101 | call AccessDPT_GetDriveSelectByteToAL
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102 | mov [bp+IDEPACK.bDrvAndHead], al
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103 | call Device_SelectDrive
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104 | STORE_ERROR_FLAG_TO_DPT FLG_INITERROR_FAILED_TO_SELECT_DRIVE
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105 | %ifdef USE_386
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106 | jc .ReturnWithErrorCodeInAH
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107 | %else
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108 | jnc SHORT .ContinueInitializationSinceDriveSelectedSuccessfully
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109 | jmp .ReturnWithErrorCodeInAH
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110 | .ContinueInitializationSinceDriveSelectedSuccessfully:
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111 | %endif
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112 |
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113 |
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114 | %ifdef MODULE_8BIT_IDE_ADVANCED
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115 | ;;; Set XT-CF mode
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116 | call AH1Eh_GetCurrentXTCFmodeToAX
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117 | call AH9h_SetModeFromALtoXTCF
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118 | STORE_ERROR_FLAG_TO_DPT FLG_INITERROR_FAILED_TO_SET_XTCF_MODE
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119 | %endif ; MODULE_8BIT_IDE_ADVANCED
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120 |
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121 | %ifdef MODULE_8BIT_IDE
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122 | ;;; Set 8-bit PIO mode
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123 | call AH9h_Enable8bitModeForDevice8bitAta
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124 | STORE_ERROR_FLAG_TO_DPT FLG_INITERROR_FAILED_TO_SET_8BIT_MODE
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125 | %endif ; MODULE_8BIT_IDE
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126 |
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127 |
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128 | ;;; InitializeDeviceParameters
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129 | ; Initialize Logical Sectors per Track and Max Head number
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130 | mov ax, [di+DPT.wPchsHeadsAndSectors]
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131 | dec ax ; Max Head number
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132 | xchg ah, al
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133 | mov dl, al ; Sectors per track
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134 | mov al, COMMAND_INITIALIZE_DEVICE_PARAMETERS
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135 | mov bx, TIMEOUT_AND_STATUS_TO_WAIT(TIMEOUT_BSY, FLG_STATUS_BSY)
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136 | call Idepack_StoreNonExtParametersAndIssueCommandFromAL
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137 | STORE_ERROR_FLAG_TO_DPT FLG_INITERROR_FAILED_TO_INITIALIZE_CHS_PARAMETERS
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138 |
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139 |
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140 | ;;; SetWriteCache
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141 | ; Enable or Disable Write Cache
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142 | call AccessDPT_GetPointerToDRVPARAMStoCSBX
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143 | mov bl, [cs:bx+DRVPARAMS.wFlags]
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144 | push bx ; Save .wFlags for later use in InitializeBlockMode
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145 | and bx, BYTE MASK_DRVPARAMS_WRITECACHE
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146 | jz SHORT .SkipSetWriteCache ; DEFAULT_WRITE_CACHE
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147 | mov si, [cs:bx+.rgbWriteCacheCommands]
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148 | call AH23h_SetControllerFeatures
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149 | STORE_ERROR_FLAG_TO_DPT FLG_INITERROR_FAILED_TO_SET_WRITE_CACHE
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150 | .SkipSetWriteCache:
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151 |
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152 |
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153 | ;;; RecalibrateDrive
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154 | ; Recalibrate drive by seeking to cylinder 0
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155 | call AH11h_RecalibrateDrive
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156 | STORE_ERROR_FLAG_TO_DPT FLG_INITERROR_FAILED_TO_RECALIBRATE_DRIVE
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157 |
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158 |
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159 | ;;; InitializeBlockMode
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160 | ; Initialize block mode transfers
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161 | pop ax ; Restore .wFlags saved in SetWriteCache
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162 | test al, FLG_DRVPARAMS_BLOCKMODE ; Tested here so block mode can be enabled with AH=24h
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163 | jz SHORT .BlockModeDisabled
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164 |
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165 | ; Try block sizes until we find largest possible supported by drive
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166 | mov bl, 128
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167 | .TryNextBlockSize:
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168 | mov al, bl
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169 | call AH24h_SetBlockSize ; Stores block size to DPT
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170 | jnc SHORT .SupportedBlockSizeFound
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171 | shr bl, 1
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172 | jnc SHORT .TryNextBlockSize
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173 | STORE_ERROR_FLAG_TO_DPT FLG_INITERROR_FAILED_TO_SET_BLOCK_MODE
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174 | .BlockModeDisabled:
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175 | .SupportedBlockSizeFound:
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176 |
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177 |
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178 | %ifdef MODULE_ADVANCED_ATA
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179 | ;;; InitializePioMode
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180 | ; Initialize fastest supported PIO mode
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181 | mov dl, PIO_DEFAULT_MODE_DISABLE_IORDY
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182 | test BYTE [di+DPT.bFlagsHigh], FLGH_DPT_IORDY
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183 | jz SHORT .IordyNotSupported
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184 |
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185 | ; Advanced PIO mode 3 and above
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186 | mov dl, [di+DPT_ADVANCED_ATA.bPioMode]
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187 | or dl, PIO_FLOW_CONTROL_MODE_xxx
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188 |
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189 | .IordyNotSupported:
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190 | mov si, FEATURE_SET_TRANSFER_MODE
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191 | call AH23h_SetControllerFeatures
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192 | STORE_ERROR_FLAG_TO_DPT FLG_INITERROR_FAILED_TO_SET_PIO_MODE
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193 | %endif ; MODULE_ADVANCED_ATA
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194 |
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195 |
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196 | %ifdef MODULE_FEATURE_SETS
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197 | ;;; InitStandbyTimer
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198 | ; Initialize the standby timer (if supported)
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199 | test BYTE [di+DPT.bFlagsHigh], FLGH_DPT_POWER_MANAGEMENT_SUPPORTED
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200 | jz SHORT .NoPowerManagementSupport
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201 |
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202 | mov al, COMMAND_IDLE
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203 | mov dl, [cs:ROMVARS.bIdleTimeout]
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204 | mov bx, TIMEOUT_AND_STATUS_TO_WAIT(TIMEOUT_BSY, FLG_STATUS_BSY)
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205 | call Idepack_StoreNonExtParametersAndIssueCommandFromAL
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206 | STORE_ERROR_FLAG_TO_DPT FLG_INITERROR_FAILED_TO_INITIALIZE_STANDBY_TIMER
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207 | .NoPowerManagementSupport:
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208 | %endif ; MODULE_FEATURE_SETS
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209 |
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210 |
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211 | ; There might have been several errors so just return one error code for them all
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212 | .ReturnWithErrorCodeInAH:
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213 | %ifdef MODULE_ADVANCED_ATA
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214 | mov ah, [di+DPT.bInitError]
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215 | test ah, ah ; Clears CF
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216 | jz SHORT .ReturnWithSuccess
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217 | mov ah, RET_HD_RESETFAIL
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218 | stc
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219 | .ReturnWithSuccess:
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220 | %endif
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221 |
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222 | pop bx
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223 | pop dx
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224 | pop si
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225 | pop es
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226 | ret
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227 |
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228 |
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229 | .rgbWriteCacheCommands:
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230 | db 0 ; DEFAULT_WRITE_CACHE
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231 | db FEATURE_DISABLE_WRITE_CACHE ; DISABLE_WRITE_CACHE
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232 | db FEATURE_ENABLE_WRITE_CACHE ; ENABLE_WRITE_CACHE
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233 |
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234 |
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235 |
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236 | ;--------------------------------------------------------------------
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237 | ; SetErrorFlagFromALwithErrorCodeInAH
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238 | ; Parameters:
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239 | ; AH: BIOS Error Code
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240 | ; AL: Error flag to set
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241 | ; DS:DI: Ptr to DPT
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242 | ; CF: Set if error code in AH
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243 | ; Clear if AH = 0
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244 | ; Returns:
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245 | ; CF: Clear if no error
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246 | ; Set if error flag was set
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247 | ; Corrupts registers:
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248 | ; Nothing
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249 | ;--------------------------------------------------------------------
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250 | IgnoreInvalidCommandError:
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251 | xor ah, ah ; Clears CF
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252 | SetErrorFlagFromALwithErrorCodeInAH:
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253 | jnc SHORT .NoErrorFlagToSet
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254 | cmp ah, RET_HD_INVALID
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255 | jbe SHORT IgnoreInvalidCommandError
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256 |
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257 | or [di+DPT.bInitError], al
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258 | stc
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259 | .NoErrorFlagToSet:
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260 | ret
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261 |
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262 |
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263 | %ifdef MODULE_8BIT_IDE_ADVANCED
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264 | ;--------------------------------------------------------------------
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265 | ; AH9h_SetModeFromALtoXTCF
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266 | ; Parameters:
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267 | ; AL: XT-CF Mode to set
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268 | ; DS:DI: Ptr to DPT (in RAMVARS segment)
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269 | ; SS:BP: Ptr to IDEPACK
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270 | ; Returns:
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271 | ; AH: Int 13h return status
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272 | ; CF: Clear if successful or device is not XT-CF
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273 | ; Set if failed to set mode for XT-CF
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274 | ; Corrupts registers:
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275 | ; AL, BX, CX, DX, SI
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276 | ;--------------------------------------------------------------------
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277 | AH9h_SetModeFromALtoXTCF:
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278 | call AccessDPT_IsThisDeviceXTCF
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279 | jne SHORT IgnoreInvalidCommandError
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280 | jmp AH1Eh_ChangeXTCFmodeBasedOnModeInAL
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281 | %endif ; MODULE_8BIT_IDE_ADVANCED
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282 |
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283 |
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284 | %ifdef MODULE_8BIT_IDE
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285 | ;--------------------------------------------------------------------
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286 | ; AH9h_Enable8bitModeForDevice8bitAta
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287 | ; Parameters:
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288 | ; DS:DI: Ptr to DPT (in RAMVARS segment)
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289 | ; SS:BP: Ptr to IDEPACK
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290 | ; Returns:
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291 | ; AH: Int 13h return status
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292 | ; CF: Clear if successful or device is not DEVICE_8BIT_ATA
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293 | ; Set if failed to set 8-bit mode for DEVICE_8BIT_ATA
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294 | ; Corrupts registers:
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295 | ; AL, BX, CX, DX, SI
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296 | ;--------------------------------------------------------------------
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297 | AH9h_Enable8bitModeForDevice8bitAta:
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298 | cmp BYTE [di+DPT_ATA.bDevice], DEVICE_8BIT_ATA
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299 | jne SHORT IgnoreInvalidCommandError
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300 | jmp AH23h_Enable8bitPioMode
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301 | %endif ; MODULE_8BIT_IDE
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