| 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 | ; Section containing code
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| 5 | SECTION .text
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| 6 |
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| 7 | ;--------------------------------------------------------------------
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| 8 | ; Int 13h function AH=9h, Initialize Drive Parameters.
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| 9 | ;
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| 10 | ; AH9h_HandlerForInitializeDriveParameters
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| 11 | ; Parameters:
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| 12 | ; DL: Translated Drive number
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| 13 | ; DS:DI: Ptr to DPT (in RAMVARS segment)
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| 14 | ; SS:BP: Ptr to IDEPACK
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| 15 | ; Returns with INTPACK:
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| 16 | ; AH: Int 13h return status
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| 17 | ; CF: 0 if successful, 1 if error
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| 18 | ;--------------------------------------------------------------------
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| 19 | AH9h_HandlerForInitializeDriveParameters:
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| 20 | %ifndef USE_186
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| 21 | call AH9h_InitializeDriveForUse
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| 22 | jmp Int13h_ReturnFromHandlerAfterStoringErrorCodeFromAH
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| 23 | %else
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| 24 | push Int13h_ReturnFromHandlerAfterStoringErrorCodeFromAH
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| 25 | ; Fall to AH9h_InitializeDriveForUse
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| 26 | %endif
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| 27 |
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| 28 |
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| 29 | ;--------------------------------------------------------------------
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| 30 | ; Initialized drive to be ready for use.
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| 31 | ;
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| 32 | ; AH9h_InitializeDriveForUse
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| 33 | ; Parameters:
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| 34 | ; DS:DI: Ptr to DPT (in RAMVARS segment)
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| 35 | ; SS:BP: Ptr to IDEPACK
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| 36 | ; Returns:
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| 37 | ; AH: Int 13h return status
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| 38 | ; CF: 0 if successful, 1 if error
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| 39 | ; Corrupts registers:
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| 40 | ; AL, BX, CX, DX
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| 41 | ;--------------------------------------------------------------------
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| 42 | AH9h_InitializeDriveForUse:
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| 43 | push es
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| 44 | push si
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| 45 |
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| 46 | %ifdef MODULE_SERIAL
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| 47 | ; no need to do this for serial devices
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| 48 | xor ah, ah
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| 49 | test byte [di+DPT.bFlagsHigh], FLGH_DPT_SERIAL_DEVICE ; Clears CF
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| 50 | jnz .ReturnWithErrorCodeInAH
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| 51 |
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| 52 | %else
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| 53 | ; Clear Initialization Error flags from DPT
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| 54 | mov BYTE [di+DPT_ATA.bInitError], 0
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| 55 | %endif
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| 56 |
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| 57 | ; Try to select drive and wait until ready
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| 58 | call AccessDPT_GetDriveSelectByteToAL
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| 59 | mov [bp+IDEPACK.bDrvAndHead], al
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| 60 | call Device_SelectDrive
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| 61 | mov al, FLG_INITERROR_FAILED_TO_SELECT_DRIVE
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| 62 | call SetErrorFlagFromALwithErrorCodeInAH
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| 63 | jc SHORT .ReturnWithErrorCodeInAH
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| 64 |
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| 65 | ; Initialize CHS parameters if LBA is not used
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| 66 | call InitializeDeviceParameters
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| 67 | mov al, FLG_INITERROR_FAILED_TO_INITIALIZE_CHS_PARAMETERS
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| 68 | call SetErrorFlagFromALwithErrorCodeInAH
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| 69 |
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| 70 | ; Enable or Disable Write Cache
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| 71 | call SetWriteCache
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| 72 | mov al, FLG_INITERROR_FAILED_TO_SET_WRITE_CACHE
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| 73 | call SetErrorFlagFromALwithErrorCodeInAH
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| 74 |
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| 75 | ; Recalibrate drive by seeking to cylinder 0
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| 76 | .RecalibrateDrive:
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| 77 | call AH11h_RecalibrateDrive
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| 78 | mov al, FLG_INITERROR_FAILED_TO_RECALIBRATE_DRIVE
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| 79 | call SetErrorFlagFromALwithErrorCodeInAH
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| 80 |
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| 81 | ; Initialize block mode transfers
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| 82 | .InitializeBlockMode:
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| 83 | call InitializeBlockMode
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| 84 | mov al, FLG_INITERROR_FAILED_TO_SET_BLOCK_MODE
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| 85 | call SetErrorFlagFromALwithErrorCodeInAH
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| 86 |
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| 87 | %ifdef MODULE_ADVANCED_ATA
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| 88 | ; Initialize fastest supported PIO mode
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| 89 | .InitializePioMode:
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| 90 | call InitializePioMode
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| 91 | mov al, FLG_INITERROR_FAILED_TO_SET_PIO_MODE
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| 92 | call SetErrorFlagFromALwithErrorCodeInAH
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| 93 | %endif
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| 94 |
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| 95 | ; There might have been several errors so just return
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| 96 | ; one error code for them all
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| 97 | cmp BYTE [di+DPT_ATA.bInitError], 0
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| 98 | je SHORT .ReturnWithErrorCodeInAH
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| 99 | mov ah, RET_HD_RESETFAIL
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| 100 | stc
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| 101 |
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| 102 | .ReturnWithErrorCodeInAH:
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| 103 | pop si
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| 104 | pop es
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| 105 | ret
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| 106 |
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| 107 |
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| 108 | ;--------------------------------------------------------------------
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| 109 | ; InitializeDeviceParameters
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| 110 | ; Parameters:
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| 111 | ; DS:DI: Ptr to DPT (in RAMVARS segment)
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| 112 | ; SS:BP: Ptr to IDEPACK
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| 113 | ; Returns:
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| 114 | ; AH: BIOS Error code
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| 115 | ; CF: Cleared if successful
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| 116 | ; Set if any error
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| 117 | ; Corrupts registers:
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| 118 | ; AL, BX, CX, DX
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| 119 | ;--------------------------------------------------------------------
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| 120 | InitializeDeviceParameters:
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| 121 | ; No need to initialize CHS parameters if LBA mode enabled
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| 122 | test BYTE [di+DPT.bFlagsLow], FLG_DRVNHEAD_LBA ; Clear CF
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| 123 | jnz SHORT ReturnSuccessSinceInitializationNotNeeded
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| 124 |
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| 125 | ; Initialize Logical Sectors per Track and Max Head number
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| 126 | mov ah, [di+DPT.bPchsHeads]
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| 127 | dec ah ; Max Head number
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| 128 | mov dl, [di+DPT.bPchsSectors] ; Sectors per Track
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| 129 | mov al, COMMAND_INITIALIZE_DEVICE_PARAMETERS
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| 130 | mov bx, TIMEOUT_AND_STATUS_TO_WAIT(TIMEOUT_BSY, FLG_STATUS_BSY)
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| 131 | jmp Idepack_StoreNonExtParametersAndIssueCommandFromAL
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| 132 |
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| 133 |
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| 134 | ;--------------------------------------------------------------------
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| 135 | ; SetWriteCache
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| 136 | ; Parameters:
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| 137 | ; DS:DI: Ptr to DPT (in RAMVARS segment)
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| 138 | ; Returns:
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| 139 | ; AH: BIOS Error code
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| 140 | ; CF: Cleared if successful
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| 141 | ; Set if any error
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| 142 | ; Corrupts registers:
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| 143 | ; AL, BX, CX, DX, SI
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| 144 | ;--------------------------------------------------------------------
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| 145 | SetWriteCache:
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| 146 | call AccessDPT_GetPointerToDRVPARAMStoCSBX
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| 147 | mov bl, [cs:bx+DRVPARAMS.wFlags]
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| 148 | and bx, BYTE MASK_DRVPARAMS_WRITECACHE
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| 149 | jz SHORT ReturnSuccessSinceInitializationNotNeeded ; DEFAULT_WRITE_CACHE
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| 150 | mov si, [cs:bx+.rgbWriteCacheCommands]
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| 151 | jmp AH23h_SetControllerFeatures
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| 152 |
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| 153 | .rgbWriteCacheCommands:
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| 154 | db 0 ; DEFAULT_WRITE_CACHE
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| 155 | db FEATURE_DISABLE_WRITE_CACHE ; DISABLE_WRITE_CACHE
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| 156 | db FEATURE_ENABLE_WRITE_CACHE ; ENABLE_WRITE_CACHE
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| 157 |
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| 158 |
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| 159 | %ifdef MODULE_ADVANCED_ATA
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| 160 | ;--------------------------------------------------------------------
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| 161 | ; InitializePioMode
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| 162 | ; Parameters:
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| 163 | ; DS:DI: Ptr to DPT (in RAMVARS segment)
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| 164 | ; Returns:
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| 165 | ; AH: BIOS Error code
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| 166 | ; CF: Cleared if successful
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| 167 | ; Set if any error
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| 168 | ; Corrupts registers:
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| 169 | ; AL, BX, CX, DX
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| 170 | ;--------------------------------------------------------------------
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| 171 | InitializePioMode:
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| 172 | mov dl, PIO_DEFAULT_MODE_DISABLE_IORDY
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| 173 | test BYTE [di+DPT.bFlagsHigh], FLGH_DPT_IORDY
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| 174 | jz SHORT .IordyNotSupported
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| 175 |
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| 176 | ; Advanced PIO mode 3 and above
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| 177 | mov dl, [di+DPT_ADVANCED_ATA.bPioMode]
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| 178 | or dl, PIO_FLOW_CONTROL_MODE_xxx
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| 179 |
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| 180 | .IordyNotSupported:
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| 181 | mov si, FEATURE_SET_TRANSFER_MODE
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| 182 | jmp AH23h_SetControllerFeatures
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| 183 | %endif
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| 184 |
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| 185 |
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| 186 | ;--------------------------------------------------------------------
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| 187 | ; InitializeBlockMode
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| 188 | ; Parameters:
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| 189 | ; DS:DI: Ptr to DPT (in RAMVARS segment)
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| 190 | ; Returns:
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| 191 | ; AH: BIOS Error code
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| 192 | ; CF: Cleared if successful
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| 193 | ; Set if any error
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| 194 | ; Corrupts registers:
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| 195 | ; AL, BX, CX, DX
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| 196 | ;--------------------------------------------------------------------
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| 197 | InitializeBlockMode:
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| 198 | test BYTE [di+DPT.bFlagsHigh], FLGH_DPT_BLOCK_MODE_SUPPORTED ; Clear CF
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| 199 | jz SHORT .BlockModeNotSupportedOrDisabled
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| 200 | call AccessDPT_GetPointerToDRVPARAMStoCSBX
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| 201 | test BYTE [cs:bx+DRVPARAMS.wFlags], FLG_DRVPARAMS_BLOCKMODE
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| 202 | jz SHORT .BlockModeNotSupportedOrDisabled
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| 203 |
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| 204 | ; Try block sizes until we find largest possible supported by drive
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| 205 | mov bl, 128
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| 206 | .TryNextBlockSize:
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| 207 | mov al, bl
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| 208 | call AH24h_SetBlockSize
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| 209 | jnc SHORT .SupportedBlockSizeFound
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| 210 | shr bl, 1 ; Try next size
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| 211 | jmp SHORT .TryNextBlockSize
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| 212 | .SupportedBlockSizeFound:
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| 213 | mov [di+DPT_ATA.bBlockSize], bl
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| 214 | .BlockModeNotSupportedOrDisabled:
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| 215 | ReturnSuccessSinceInitializationNotNeeded:
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| 216 | ret
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| 217 |
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| 218 |
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| 219 | ;--------------------------------------------------------------------
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| 220 | ; SetErrorFlagFromALwithErrorCodeInAH
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| 221 | ; Parameters:
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| 222 | ; AH: BIOS Error Code
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| 223 | ; AL: Error flag to set
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| 224 | ; DS:DI: Ptr to DPT
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| 225 | ; Returns:
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| 226 | ; CF: Clear if no error
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| 227 | ; Set if error flag was set
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| 228 | ; Corrupts registers:
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| 229 | ; Nothing
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| 230 | ;--------------------------------------------------------------------
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| 231 | SetErrorFlagFromALwithErrorCodeInAH:
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| 232 | jnc SHORT .NoErrorFlagToSet
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| 233 | cmp ah, RET_HD_INVALID
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| 234 | jbe SHORT .IgnoreInvalidCommandError
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| 235 |
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| 236 | or [di+DPT_ATA.bInitError], al
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| 237 | stc
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| 238 | ret
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| 239 | .IgnoreInvalidCommandError:
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| 240 | xor ah, ah
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| 241 | .NoErrorFlagToSet:
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| 242 | ret
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