| 1 | ; Project name : XTIDE Universal BIOS
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| 2 | ; Description : Command and port direction functions for different device types.
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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 | ; Device_FinalizeDPT
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| 9 | ; Parameters:
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| 10 | ; DS:DI: Ptr to Disk Parameter Table
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| 11 | ; ES:SI: Ptr to 512-byte ATA information read from the drive
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| 12 | ; CS:BP: Ptr to IDEVARS for the controller
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| 13 | ; Returns:
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| 14 | ; Nothing
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| 15 | ; Corrupts registers:
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| 16 | ; AX, BX, CX, DX
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| 17 | ;--------------------------------------------------------------------
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| 18 | Device_FinalizeDPT:
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| 19 | test BYTE [di+DPT.bFlagsHigh], FLGH_DPT_SERIAL_DEVICE
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| 20 | jnz SHORT ReturnSuccessForSerialPort
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| 21 | jmp IdeDPT_Finalize
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| 22 | ;.FinalizeDptForSerialPortDevice: ; Dead label
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| 23 | ; jmp SerialDPT_Finalize ; and code
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| 24 |
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| 25 |
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| 26 | ;--------------------------------------------------------------------
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| 27 | ; Device_ResetMasterAndSlaveController
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| 28 | ; Parameters:
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| 29 | ; DS:DI: Ptr to DPT (in RAMVARS segment)
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| 30 | ; Returns:
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| 31 | ; AH: INT 13h Error Code
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| 32 | ; CF: Cleared if success, Set if error
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| 33 | ; Corrupts registers:
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| 34 | ; AL, BX, CX, DX
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| 35 | ;--------------------------------------------------------------------
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| 36 | Device_ResetMasterAndSlaveController:
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| 37 | test BYTE [di+DPT.bFlagsHigh], FLGH_DPT_SERIAL_DEVICE
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| 38 | jnz SHORT ReturnSuccessForSerialPort
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| 39 | jmp IdeCommand_ResetMasterAndSlaveController
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| 40 |
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| 41 |
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| 42 | ;--------------------------------------------------------------------
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| 43 | ; Device_IdentifyToBufferInESSIwithDriveSelectByteInBH
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| 44 | ; Parameters:
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| 45 | ; BH: Drive Select byte for Drive and Head Select Register
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| 46 | ; DS: Segment to RAMVARS
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| 47 | ; ES:SI: Ptr to buffer to receive 512-byte IDE Information
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| 48 | ; CS:BP: Ptr to IDEVARS
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| 49 | ; Returns:
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| 50 | ; AH: INT 13h Error Code
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| 51 | ; CF: Cleared if success, Set if error
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| 52 | ; Corrupts registers:
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| 53 | ; AL, BL, CX, DX, SI, DI, ES
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| 54 | ;--------------------------------------------------------------------
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| 55 | Device_IdentifyToBufferInESSIwithDriveSelectByteInBH:
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| 56 | cmp BYTE [cs:bp+IDEVARS.bDevice], DEVICE_SERIAL_PORT
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| 57 | je SHORT .IdentifyDriveFromSerialPort
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| 58 | jmp IdeCommand_IdentifyDeviceToBufferInESSIwithDriveSelectByteInBH
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| 59 | .IdentifyDriveFromSerialPort:
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| 60 | jmp SerialCommand_IdentifyDeviceToBufferInESSIwithDriveSelectByteInBH
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| 61 |
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| 62 |
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| 63 | ;--------------------------------------------------------------------
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| 64 | ; Device_OutputCommandWithParameters
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| 65 | ; Parameters:
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| 66 | ; BH: Default system timer ticks for timeout (can be ignored)
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| 67 | ; BL: IDE Status Register bit to poll after command
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| 68 | ; ES:SI: Ptr to buffer (for data transfer commands)
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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 Error Code
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| 73 | ; CF: Cleared if success, Set if error
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| 74 | ; Corrupts registers:
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| 75 | ; AL, BX, CX, DX, (ES:SI for data transfer commands)
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| 76 | ;--------------------------------------------------------------------
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| 77 | ALIGN JUMP_ALIGN
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| 78 | Device_OutputCommandWithParameters:
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| 79 | test BYTE [di+DPT.bFlagsHigh], FLGH_DPT_SERIAL_DEVICE
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| 80 | jnz SHORT .OutputCommandToSerialPort
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| 81 | jmp IdeCommand_OutputWithParameters
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| 82 | ALIGN JUMP_ALIGN
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| 83 | .OutputCommandToSerialPort:
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| 84 | jmp SerialCommand_OutputWithParameters
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| 85 |
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| 86 |
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| 87 | ;--------------------------------------------------------------------
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| 88 | ; Device_SelectDrive
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| 89 | ; Parameters:
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| 90 | ; DS:DI: Ptr to DPT (in RAMVARS segment)
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| 91 | ; SS:BP: Ptr to IDEPACK
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| 92 | ; Returns:
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| 93 | ; AH: INT 13h Error Code
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| 94 | ; CF: Cleared if success, Set if error
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| 95 | ; Corrupts registers:
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| 96 | ; AL, BX, CX, DX
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| 97 | ;--------------------------------------------------------------------
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| 98 | ALIGN JUMP_ALIGN
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| 99 | Device_SelectDrive:
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| 100 | test BYTE [di+DPT.bFlagsHigh], FLGH_DPT_SERIAL_DEVICE
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| 101 | jnz SHORT ReturnSuccessForSerialPort
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| 102 | jmp IdeCommand_SelectDrive
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| 103 | ReturnSuccessForSerialPort:
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| 104 | xor ax, ax
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| 105 | ret
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