pcic.asm

CF卡读卡程序

; *
; ***********************************************************************
; *             Intel Confidential                                      *
; *             Copyright (C) Intel Corporation 1994-97                 *
; *             All Rights Reserved.                                    *
; ***********************************************************************
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;


;---------------------------------------------------------------;
; Socket-specific definitions.                                  ;
;---------------------------------------------------------------;
SocketRegisterPort      equ      3E0h

StatusRegister          equ       01h
PowerRegister           equ       02h
ControlRegister         equ       03h
WindowRegister          equ       06h
StartLowRegister        equ       10h
StartHighRegister       equ       11h
StopLowRegister         equ       12h
StopHighRegister        equ       13h
MemoryLowRegister       equ       14h
MemoryHighRegister      equ       15h

PowerRegister0V         equ       40h
PowerRegister5V         equ      0F5h
PowerRegister12V        equ      0FAh
Power5VRequest          equ        5d
Power12VRequest         equ       12d

ControlRegisterReset    equ       40h

StatusRegisterReady     equ       20h

StartHighRegister16bit  equ       80h

StopHighRegisterNoWait  equ       00h

MemoryWindowAddress     equ      0D0h
MemoryWindowMask        equ     3FFFh

WindowRegisterDecode12  equ       20h
WindowRegisterEnable0   equ        1h

;---------------------------------------------------------------;
; Timer definitions.                                            ;
;---------------------------------------------------------------;
PowerUpDelay            equ     0FFFh
ResetDelay              equ    0FFFFh

;---------------------------------------------------------------;
; Return codes.                                                 ;
;---------------------------------------------------------------;
ErrorNone               equ        00h
ErrorParam              equ        03h

;---------------------------------------------------------------;
; This is the structure of the packet sent to the               ;
; _FlashDevCompatCheck routine.                                 ;
;---------------------------------------------------------------;
FTLTable        STRUC
	MediaSize       dd      ?       ; size, in bytes, of the card
	MediaBlockSize  dd      ?       ; size, in bytes, of a block pair
	MediaBlocks     dw      ?       ; number of blocks on card
	MediaType       db      ?       ; WP, suspend capability, memory type
FTLTable        ENDS

;---------------------------------------------------------------;
; Structures for low/high byte/word control.                    ;
;---------------------------------------------------------------;
WordSplit       STRUC
	Lo              dw      ?
	Hi              dw      ?
WordSplit       ENDS

;---------------------------------------------------------------;
; Code Segment, comes first.                                    ;
;---------------------------------------------------------------;
group   DGROUP _DATA, _BSS

_TEXT    segment byte public 'CODE'
;---------------------------------------------------------------;
; The window is defined here with the following attributes:     ;
;       location = address D000h                                ;
;       size     = 4KB                                          ;
;---------------------------------------------------------------;
_TEXT  ends

;---------------------------------------------------------------;
; Data Segment, comes second.  Just one item in here, to track  ;
; the window-mapped address of the card.  This way, we only have;
; to execute the memory mapping sequence if we need to change   ;
; the address (it can be a costly effort as far as performance).;
;---------------------------------------------------------------;
	PUBLIC  _WindowBaseAddress,_WindowMask

_DATA   segment word public 'DATA'
	_WindowBaseAddress      dw      0D000h
	_WindowMask             dw       0FFFh
	LastWindowAddress       dw      0FFFFh
_DATA   ends

_BSS    segment word public 'BSS'
_BSS    ends

;---------------------------------------------------------------;
; Back to the Code Segment.  All of this code will precede the  ;
; data above.                                                   ;
;---------------------------------------------------------------;
_TEXT    segment byte public 'CODE'
	assume  cs:_TEXT,ds:DGROUP

;****************************************************************************
;* _PowerDownSocket
;*
;* FUNCTION:
;*      Bring socket Vcc and Vpp voltages down to 0.  Called by the application
;*      layer.
;*
;* INPUTS:
;*      None
;*
;* GLOBALS:
;*      None
;*
;* FORMAT:
;*      void _PowerDownSocket(VOID)
;*
;* RETURNS:
;*      None
;****************************************************************************
_PowerDownSocket        proc    near

	push    bp
	mov     bp,sp

	;---------------------------------------------------------------;
	; Always a good idea to shut off interrupts when dealing with   ;
	; a dual-port controller.  If this code ever becomes            ;
	; re-enterable, we could select a register and then lose        ;
	; control before setting that register's value.  Not important  ;
	; otherwise.                                                    ;
	;---------------------------------------------------------------;
	;cli

	;---------------------------------------------------------------;
	; Select the power control register and set 0V Vcc/Vpp.         ;
	;---------------------------------------------------------------;
	mov     dx, SocketRegisterPort
	mov     al, PowerRegister
	out     dx, al

	inc     dx
	mov     al, PowerRegister0V
	out     dx, al

	;sti

	pop     bp
	ret
_PowerDownSocket        endp

;****************************************************************************
;* _PowerUpSocket
;*
;* FUNCTION:
;*      Bring socket power up to requested level, providing necessary delay
;*      in order to guarantee power level upon return.  Called by the application
;*      layer.
;*
;* INPUTS:
;*      VoltageLevel
;*      ( Power12VRequest | Power5VRequest )
;*
;* GLOBALS:
;*      None
;*
;* FORMAT:
;*      void _PowerUpSocket(int VoltageLevel)
;*
;* RETURNS:
;*      None
;****************************************************************************
_PowerUpSocket  proc    near
	push    bp
	mov     bp,sp

	;---------------------------------------------------------------;
	; Single parameter to this routine, the voltage value requested.;
	;---------------------------------------------------------------;
	mov     bx, WORD PTR [bp+6]

	;---------------------------------------------------------------;
	; Power up either 12V for write/erase, or 5V for read.          ;
	;---------------------------------------------------------------;
	;cli

	mov     dx, SocketRegisterPort
	mov     al, PowerRegister
	out     dx, al

	cmp     bx, Power12VRequest
	jne     short PowerUpSocket5V

PowerUpSocket12V:
	mov     al, PowerRegister12V
	jmp     short PowerUpSocketNow