source: xtideuniversalbios/trunk/XTIDE_Universal_BIOS/Src/Device/IDE/IdeDPT.asm @ 376

; Project name  :   XTIDE Universal BIOS
; Description   :   Sets IDE Device specific parameters to DPT.

;
; 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

;--------------------------------------------------------------------
; IdeDPT_Finalize
;   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:
;       CF:     Clear, IDE interface only supports hard disks
;   Corrupts registers:
;       AX, BX, CX, DX
;--------------------------------------------------------------------
IdeDPT_Finalize:

;--------------------------------------------------------------------
; .StoreBlockMode
;   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
;--------------------------------------------------------------------
.StoreBlockMode:
    mov     BYTE [di+DPT_ATA.bBlockSize], 1

%ifdef MODULE_ADVANCED_ATA
;--------------------------------------------------------------------
; .StoreDeviceType
;   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:
;       Nothing
;--------------------------------------------------------------------
.StoreDeviceType:
    call    IdeDPT_StoreDeviceTypeFromIdevarsInCSBPtoDPTinDSDI

;--------------------------------------------------------------------
; .StorePioModeAndTimings
;   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
;--------------------------------------------------------------------
.StorePioMode:
    call    AtaID_GetMaxPioModeToAXandMinCycleTimeToCX
    mov     [di+DPT_ADVANCED_ATA.wMinPioCycleTime], cx
    mov     [di+DPT_ADVANCED_ATA.bPioMode], al
    or      [di+DPT.bFlagsHigh], ah 

;--------------------------------------------------------------------
; .DetectAdvancedIdeController
;   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
;--------------------------------------------------------------------
.DetectAdvancedIdeController:
    call    AccessDPT_GetIdeBasePortToBX
    call    AdvAtaInit_DetectControllerForIdeBaseInBX
    mov     [di+DPT_ADVANCED_ATA.wControllerID], ax ; Store zero if none detected
    mov     [di+DPT_ADVANCED_ATA.wControllerBasePort], dx
    jnc     SHORT .NoAdvancedControllerDetected

    ; Use highest common PIO mode from controller and drive.
    ; Many VLB controllers support PIO modes up to 2.
    call    AdvAtaInit_GetControllerMaxPioModeToAL
    jnc     SHORT .ChangeTo32bitDevice
    and     BYTE [di+DPT.bFlagsHigh], ~FLGH_DPT_IORDY   ; No IORDY supported if need to limit
    MIN_U   [di+DPT_ADVANCED_ATA.bPioMode], al

    ; We have detected 32-bit controller so change Device Type since
    ; it might have been set to 16-bit on IDEVARS
.ChangeTo32bitDevice:
    mov     BYTE [di+DPT_ADVANCED_ATA.bDevice], DEVICE_32BIT_ATA

.NoAdvancedControllerDetected:

%endif ; MODULE_ADVANCED_ATA

;--------------------------------------------------------------------
; IdeDPT_StoreReversedAddressLinesFlagIfNecessary
;   Parameters:
;       DS:DI:  Ptr to Disk Parameter Table
;       CS:BP:  Ptr to IDEVARS for the controller
;   Returns:
;       CF:     Always clear
;   Corrupts registers:
;       Nothing
;--------------------------------------------------------------------
IdeDPT_StoreReversedAddressLinesFlagIfNecessary:
    cmp     BYTE [cs:bp+IDEVARS.bDevice], DEVICE_XTIDE_REV2
    je      SHORT .SetFlagForSwappedA0andA3
    cmp     BYTE [cs:bp+IDEVARS.bDevice], DEVICE_FAST_XTIDE
    jne     SHORT .EndDPT
.SetFlagForSwappedA0andA3:
    or      BYTE [di+DPT.bFlagsHigh], FLGH_DPT_REVERSED_A0_AND_A3
.EndDPT:
    clc
    ret


%ifdef MODULE_ADVANCED_ATA
;--------------------------------------------------------------------
; IdeDPT_StoreDeviceTypeFromIdevarsInCSBPtoDPTinDSDI
;   Parameters:
;       DS:DI:  Ptr to Disk Parameter Table
;       CS:BP:  Ptr to IDEVARS for the controller
;   Returns:
;       Nothing
;   Corrupts registers:
;       AL
;--------------------------------------------------------------------
IdeDPT_StoreDeviceTypeFromIdevarsInCSBPtoDPTinDSDI:
    mov     al, [cs:bp+IDEVARS.bDevice]
    mov     [di+DPT_ADVANCED_ATA.bDevice], al
    ret

%endif