source: xtideuniversalbios/trunk/XTIDE_Universal_BIOS_Configurator_v2/Src/AutoConfigure.asm@ 628

; Project name  :   XTIDE Universal BIOS Configurator v2
; Description   :   Functions to automatically configure XTIDE
;                   Universal BIOS for current system.

;
; XTIDE Universal BIOS and Associated Tools
; Copyright (C) 2009-2010 by Tomi Tilli, 2011-2013 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


;--------------------------------------------------------------------
; AutoConfigure_ForThisSystem
; MENUITEM activation function (.fnActivate)
;   Parameters:
;       SS:BP:  Ptr to MENU
;   Returns:
;       Nothing
;   Corrupts registers:
;       All, except segments
;--------------------------------------------------------------------
ALIGN JUMP_ALIGN
AutoConfigure_ForThisSystem:
    push    es
    push    ds

    call    Buffers_GetFileBufferToESDI     ; ROMVARS now in ES:DI
    push    es
    pop     ds                              ; ROMVARS now in DS:DI
    call    ChecksumSystemBios
    call    DetectOlivettiM24
    call    ResetIdevarsToDefaultValues
    call    DetectIdePortsAndDevices
    call    EnableInterruptsForAllStandardControllers
    call    StoreAndDisplayNumberOfControllers

    pop     ds
    pop     es
.Return:
    ret


;--------------------------------------------------------------------
; ChecksumSystemBios
;   Parameters:
;       DS:DI:  Ptr to ROMVARS
;   Returns:
;       Nothing
;   Corrupts registers:
;       AX, BX, CX, DX, SI
;--------------------------------------------------------------------
ALIGN JUMP_ALIGN
ChecksumSystemBios:
    push    ds
    mov     si, 0F000h
    mov     ds, si
    mov     si, 0FFFFh
    ; DS:SI now points to the end of the System BIOS.
    std
    mov     cx, 32768   ; The smallest known problematic BIOS so far.
    mov     dx, si      ; Initialize the checksum
    call    CalculateCRC_CCITTfromDSSIwithSizeInCX
    pop     ds
    mov     bx, .Checksums
    cld
.NextChecksum:
    mov     ax, [cs:bx]
    test    ax, ax
    jz      SHORT AutoConfigure_ForThisSystem.Return
    inc     bx
    inc     bx
    cmp     ax, dx
    jne     SHORT .NextChecksum
    or      BYTE [di+ROMVARS.wFlags], FLG_ROMVARS_CLEAR_BDA_HD_COUNT
    mov     dx, g_szDlgBadBiosFound
    jmp     Dialogs_DisplayNotificationFromCSDX

ALIGN WORD_ALIGN
.Checksums:
    dw      0D192h                      ; 32 KB Zenith Z-161 (071784)
    dw      02F69h                      ; 32 KB Zenith Z-171 (031485)
    dw      0


;--------------------------------------------------------------------
; CalculateCRC_CCITTfromDSSIwithSizeInCX
;   Parameters:
;       DS:SI:  Pointer to string to checksum
;       CX:     Length of string to checksum
;       DX:     Checksum (initially 0FFFFh)
;       DF:     Set/Clear depending on direction wanted
;   Returns:
;       DX:     Checksum
;       DS:SI:  Pointer to byte after the end of checksummed string
;   Corrupts registers:
;       AX, BX, CX
;--------------------------------------------------------------------
ALIGN JUMP_ALIGN
CalculateCRC_CCITTfromDSSIwithSizeInCX:
;   jcxz    .Return
    xor     bh, bh
    mov     ah, 0E0h
.NextByte:
    lodsb
    xor     dh, al
    mov     bl, dh
%ifdef USE_186
    rol     bx, 4
%else
    rol     bx, 1
    rol     bx, 1
    rol     bx, 1
    rol     bx, 1
%endif
    xor     dx, bx
    rol     bx, 1
    xchg    dh, dl
    xor     dx, bx
%ifdef USE_186
    ror     bx, 4
%else
    ror     bx, 1
    ror     bx, 1
    ror     bx, 1
    ror     bx, 1
%endif
    and     bl, ah
    xor     dx, bx
    ror     bx, 1
    xor     dh, bl
    loop    .NextByte
;.Return:
    ret


;--------------------------------------------------------------------
; DetectOlivettiM24
;   Parameters:
;       Nothing
;   Returns:
;       ZF:     Set if computer is not an Olivetti M24
;               Clear if computer is an Olivetti M24
;   Corrupts registers:
;       AX, BX, CX, DX
;--------------------------------------------------------------------
ALIGN JUMP_ALIGN
DetectOlivettiM24:
    mov     ah, 0FEh    ; Request the current date and time
    mov     ch, 0FFh    ; Set the hours to an invalid value
    int     BIOS_TIME_PCI_PNP_INTERRUPT_1Ah
    inc     ch          ; Hours changed?
    jz      SHORT .ThisIsNotAnOlivettiM24
    mov     BYTE [cs:bIsOlivettiM24], 1
.ThisIsNotAnOlivettiM24:
    ret

bIsOlivettiM24:
    db      0


;--------------------------------------------------------------------
; ResetIdevarsToDefaultValues
;   Parameters:
;       DS:DI:  Ptr to ROMVARS
;       ES:DI:  Ptr to ROMVARS
;   Returns:
;       Nothing
;   Corrupts registers:
;       AX, CX
;--------------------------------------------------------------------
ALIGN JUMP_ALIGN
ResetIdevarsToDefaultValues:
    push    di
    add     di, BYTE ROMVARS.ideVarsBegin
    mov     cx, ROMVARS.ideVarsEnd - ROMVARS.ideVarsBegin
    call    Memory_ZeroESDIwithSizeInCX ; Never clears ROMVARS.ideVarsSerialAuto
    pop     di

    ; Set default values (other than zero)
    mov     ax, DISABLE_WRITE_CACHE | (TRANSLATEMODE_AUTO<<TRANSLATEMODE_FIELD_POSITION) | FLG_DRVPARAMS_BLOCKMODE
    mov     [di+ROMVARS.ideVars0+IDEVARS.drvParamsMaster+DRVPARAMS.wFlags], ax
    mov     [di+ROMVARS.ideVars0+IDEVARS.drvParamsSlave+DRVPARAMS.wFlags], ax

    mov     [di+ROMVARS.ideVars1+IDEVARS.drvParamsMaster+DRVPARAMS.wFlags], ax
    mov     [di+ROMVARS.ideVars1+IDEVARS.drvParamsSlave+DRVPARAMS.wFlags], ax

    mov     [di+ROMVARS.ideVars2+IDEVARS.drvParamsMaster+DRVPARAMS.wFlags], ax
    mov     [di+ROMVARS.ideVars2+IDEVARS.drvParamsSlave+DRVPARAMS.wFlags], ax

    mov     [di+ROMVARS.ideVars3+IDEVARS.drvParamsMaster+DRVPARAMS.wFlags], ax
    mov     [di+ROMVARS.ideVars3+IDEVARS.drvParamsSlave+DRVPARAMS.wFlags], ax
    ret


;--------------------------------------------------------------------
; DetectIdePortsAndDevices
;   Parameters:
;       DS:DI:  Ptr to ROMVARS
;   Returns:
;       CX:     Number of controllers detected
;   Corrupts registers:
;       AX, BX, DX, SI
;--------------------------------------------------------------------
ALIGN JUMP_ALIGN
DetectIdePortsAndDevices:
    xor     cx, cx                          ; Number of devices found
    xor     dx, dx                          ; IDE_PORT_TO_START_DETECTION
    lea     si, [di+ROMVARS.ideVarsBegin]   ; DS:SI points to first IDEVARS

.DetectFromNextPort:
    call    IdeAutodetect_IncrementDXtoNextIdeBasePort
    jz      SHORT .AllPortsAlreadyDetected
    push    si
    call    IdeAutodetect_DetectIdeDeviceFromPortDXAndReturnControlBlockInSI
    mov     bx, si
    pop     si
    jc      SHORT .DetectFromNextPort

    ; Device found from port DX, Device Type returned in AL
    inc     cx  ; Increment number of controllers found
    mov     [si+IDEVARS.wBasePort], dx
    mov     [si+IDEVARS.wControlBlockPort], bx
    mov     [si+IDEVARS.bDevice], al

    ; Point to next IDEVARS
    add     si, IDEVARS_size
    cmp     si, ROMVARS.ideVars3
    jbe     SHORT .DetectFromNextPort
.AllPortsAlreadyDetected:
    ret


;--------------------------------------------------------------------
; EnableInterruptsForAllStandardControllers
;   Parameters:
;       DS:DI:  Ptr to ROMVARS
;       CX:     Number of controllers detected
;   Returns:
;       Nothing
;   Corrupts registers:
;       AX
;--------------------------------------------------------------------
ALIGN JUMP_ALIGN
EnableInterruptsForAllStandardControllers:
    jcxz    .NoControllersDetected
    test    BYTE [ROMVARS.wFlags+1], FLG_ROMVARS_MODULE_IRQ >> 8
    jz      SHORT .NoModuleIrq
    call    Buffers_IsXTbuildLoaded
    je      SHORT .DoNotEnableIRQforXTbuilds
    push    di
    push    cx

    add     di, BYTE ROMVARS.ideVars0   ; DS:DI now points first IDEVARS
.CheckNextController:
    mov     al, 14
    cmp     WORD [di+IDEVARS.wBasePort], DEVICE_ATA_PRIMARY_PORT
    je      SHORT .EnableIrqAL

    inc     ax  ; 15
    cmp     WORD [di+IDEVARS.wBasePort], DEVICE_ATA_SECONDARY_PORT

%if 0
    je      SHORT .EnableIrqAL

    ; Defaults on the GSI Inc. Model 2C EIDE controller
    mov     al, 11
    cmp     WORD [di+IDEVARS.wBasePort], DEVICE_ATA_TERTIARY_PORT
    je      SHORT .EnableIrqAL

    dec     ax  ; 10
    cmp     WORD [di+IDEVARS.wBasePort], DEVICE_ATA_QUATERNARY_PORT
%endif

    jne     SHORT .DoNotEnableIRQ

.EnableIrqAL:
    mov     [di+IDEVARS.bIRQ], al
.DoNotEnableIRQ:
    add     di, IDEVARS_size
    loop    .CheckNextController
    pop     cx
    pop     di
.DoNotEnableIRQforXTbuilds:
.NoModuleIrq:
.NoControllersDetected:
    ret


;--------------------------------------------------------------------
; StoreAndDisplayNumberOfControllers
;   Parameters:
;       CX:     Number of controllers detected
;       DS:DI:  Ptr to ROMVARS
;       SS:BP:  Ptr to MENU
;   Returns:
;       Nothing
;   Corrupts registers:
;       AX, BX, DX, DI, SI, DS, ES
;--------------------------------------------------------------------
ALIGN JUMP_ALIGN
StoreAndDisplayNumberOfControllers:
    xor     ax, ax
    or      al, cl
    jnz     SHORT .AtLeastOneController
    inc     ax                          ; Cannot store zero
.AtLeastOneController:
    test    BYTE [di+ROMVARS.wFlags], FLG_ROMVARS_FULLMODE
    jnz     SHORT .FullModeSoNoNeedToLimit
    MIN_U   al, MAX_LITE_MODE_CONTROLLERS
.FullModeSoNoNeedToLimit:

    ; Store number of IDE Controllers. This will also modify
    ; menu and set unsaved changes flag.
    push    cs
    pop     ds
    mov     si, g_MenuitemConfigurationIdeControllers
    call    Menuitem_StoreValueFromAXtoMenuitemInDSSI

    ; Display results (should be changed to proper string formatting)
    add     cl, '0'
    mov     [cs:g_bControllersDetected], cl
    mov     dx, g_szDlgAutoConfigure
    jmp     Dialogs_DisplayNotificationFromCSDX