source: xtideuniversalbios/trunk/XTIDE_Universal_BIOS/Src/Device/Device.asm@ 504

; Project name  :   XTIDE Universal BIOS
; Description   :   Command and port direction functions for different device types.
        
;
; XTIDE Universal BIOS and Associated Tools 
; Copyright (C) 2009-2010 by Tomi Tilli, 2011-2012 by XTIDE Universal BIOS Team.
;
; This program is free software; you can redistribute it and/or modify
; it under the terms of the GNU General Public License as published by
; the Free Software Foundation; either version 2 of the License, or
; (at your option) any later version.
; 
; This program is distributed in the hope that it will be useful,
; but WITHOUT ANY WARRANTY; without even the implied warranty of
; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
; GNU General Public License for more details.
; Visit http://www.gnu.org/licenses/old-licenses/gpl-2.0.html               
;
        
; Section containing code
SECTION .text


%macro TEST_USING_DPT_AND_JUMP_IF_SERIAL_DEVICE 1
    test    BYTE [di+DPT.bFlagsHigh], FLGH_DPT_SERIAL_DEVICE
    jnz     SHORT %1
%endmacro

%macro CMP_USING_IDEVARS_IN_CSBP_AND_JUMP_IF 2
    cmp     BYTE [cs:bp+IDEVARS.bDevice], %1
    je      SHORT %2
%endmacro



;--------------------------------------------------------------------
; Device_FinalizeDPT
;   Parameters:
;       DS:DI:  Ptr to Disk Parameter Table
;       ES:SI:  Ptr to 512-byte ATA information read from the drive
;       CS:BP:  Ptr to IDEVARS for the controller
;   Returns:
;       Nothing
;   Corrupts registers:
;       AX, BX, CX, DX
;--------------------------------------------------------------------
%ifdef MODULE_SERIAL    ; IDE + Serial
Device_FinalizeDPT:
    ; needs to check IDEVARS vs. checking the DPT as the serial bit in the DPT is set in the Finalize routine
    CMP_USING_IDEVARS_IN_CSBP_AND_JUMP_IF   DEVICE_SERIAL_PORT, .FinalizeDptForSerialPortDevice
    jmp     IdeDPT_Finalize
.FinalizeDptForSerialPortDevice:
    jmp     SerialDPT_Finalize

%else                   ; IDE
    Device_FinalizeDPT      EQU     IdeDPT_Finalize
%endif


;--------------------------------------------------------------------
; Device_IdentifyToBufferInESSIwithDriveSelectByteInBH
;   Parameters:
;       BH:     Drive Select byte for Drive and Head Select Register
;       DX:     Autodetected port (for devices that support autodetection)
;       DS:     Segment to RAMVARS
;       ES:SI:  Ptr to buffer to receive 512-byte IDE Information
;       CS:BP:  Ptr to IDEVARS
;   Returns:
;       AH:     INT 13h Error Code
;       CF:     Cleared if success, Set if error
;   Corrupts registers:
;       AL, BX, CX, DX, SI, DI, ES
;--------------------------------------------------------------------
%ifdef MODULE_SERIAL    ; IDE + Serial
Device_IdentifyToBufferInESSIwithDriveSelectByteInBH:
    CMP_USING_IDEVARS_IN_CSBP_AND_JUMP_IF   DEVICE_SERIAL_PORT, .IdentifyDriveFromSerialPort
    jmp     IdeCommand_IdentifyDeviceToBufferInESSIwithDriveSelectByteInBH
.IdentifyDriveFromSerialPort:
    jmp     SerialCommand_IdentifyDeviceToBufferInESSIwithDriveSelectByteInBH

%else                   ; IDE
    Device_IdentifyToBufferInESSIwithDriveSelectByteInBH    EQU     IdeCommand_IdentifyDeviceToBufferInESSIwithDriveSelectByteInBH
%endif


;--------------------------------------------------------------------
; Device_OutputCommandWithParameters
;   Parameters:
;       BH:     Default system timer ticks for timeout (can be ignored)
;       BL:     IDE Status Register bit to poll after command
;       ES:SI:  Ptr to buffer (for data transfer commands)
;       DS:DI:  Ptr to DPT (in RAMVARS segment)
;       SS:BP:  Ptr to IDEPACK
;   Returns:
;       AH:     INT 13h Error Code
;       CX:     Number of successfully transferred sectors (for transfer commands)
;       CF:     Cleared if success, Set if error
;   Corrupts registers:
;       AL, BX, (CX), DX, (ES:SI for data transfer commands)
;--------------------------------------------------------------------
%ifdef MODULE_SERIAL    ; IDE + Serial
ALIGN JUMP_ALIGN
Device_OutputCommandWithParameters:
    TEST_USING_DPT_AND_JUMP_IF_SERIAL_DEVICE .OutputCommandToSerialPort
    jmp     IdeCommand_OutputWithParameters

ALIGN JUMP_ALIGN
.OutputCommandToSerialPort:
    jmp     SerialCommand_OutputWithParameters

%else                   ; IDE
    Device_OutputCommandWithParameters      EQU     IdeCommand_OutputWithParameters
%endif


;--------------------------------------------------------------------
; Device_SelectDrive
;   Parameters:
;       DS:DI:  Ptr to DPT (in RAMVARS segment)
;       SS:BP:  Ptr to IDEPACK
;   Returns:
;       AH:     INT 13h Error Code
;       CF:     Cleared if success, Set if error
;   Corrupts registers:
;       AL, BX, CX, DX
;--------------------------------------------------------------------
%ifdef MODULE_SERIAL    ; IDE + Serial
Device_SelectDrive:
    TEST_USING_DPT_AND_JUMP_IF_SERIAL_DEVICE    ReturnSuccessForSerialPort
    jmp     IdeCommand_SelectDrive

%else                   ; IDE
    Device_SelectDrive      EQU     IdeCommand_SelectDrive
%endif


%ifdef MODULE_SERIAL
ALIGN JUMP_ALIGN
ReturnSuccessForSerialPort:
    xor     ax, ax
    ret
%endif