;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
; RDOS operating system
; Copyright (C) 1988-2000, Leif Ekblad
;
; 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. The only exception to this rule
; is for commercial usage in embedded systems. For information on
; usage in commercial embedded systems, contact embedded@rdos.net
;
; 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.
;
; You should have received a copy of the GNU General Public License
; along with this program; if not, write to the Free Software
; Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
;
; The author of this program may be contacted at leif@rdos.net
;
; FAT.ASM
; FAT filesystem driver
;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

INCLUDE ..\driver.def
INCLUDE ..\user.def
INCLUDE ..\os.def
INCLUDE ..\user.inc
INCLUDE ..\os.inc
INCLUDE ..\fs.inc
INCLUDE fat.inc

attr_read_only		EQU 1
attr_hidden			EQU 2
attr_system			EQU 4
attr_volume			EQU 8
attr_dir			EQU 10h
attr_arcive			EQU 20h

	extrn allocate_dir_sel:near
	extrn free_dir_sel:near

	extrn cache_dir12_16:near
	extrn cache_dir32:near
	extrn create_dir:near
	extrn delete_dir:near
	extrn delete_file:near
	extrn rename_file:near
	extrn create_file:near

	extrn update_dir:near
	extrn update_file:near
	extrn set_file_size:near
	extrn allocate_file_list:near
	extrn free_file_list:near
	extrn read_file_block:near
	extrn write_file_block:near

	extrn format12:near
	extrn format16:near
	extrn format32:near

	extrn get_param12:near
	extrn get_param16:near
	extrn get_param32:near

	.386p

code	SEGMENT byte public use16 'CODE'

	assume cs:code

;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;
;
;		NAME:			MOUNT12
;
;		DESCRIPTION:	Mount FAT12 on a drive
;
;		RETRUNS:		DS:SI		ADDRESS TO DRIVE DATA
;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

mount12	PROC far
	push es
;
	push ax
	mov eax,SIZE drive_data_seg
	AllocateSmallGlobalMem
	mov ax,es
	mov ds,ax
	mov ax,flat_sel
	mov es,ax
	pop ax
	mov ds:fat_type,fat12
	call get_param12
	xor esi,esi
;
	pop es
	retf32
mount12	ENDP

;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;
;
;		NAME:			MOUNT16
;
;		DESCRIPTION:	Mount FAT16 on a drive
;
;		RETRUNS:		DS:SI		ADDRESS TO DRIVE DATA
;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

mount16	PROC far
	push es
;
	push ax
	mov eax,SIZE drive_data_seg
	AllocateSmallGlobalMem
	mov ax,es
	mov ds,ax
	mov ax,flat_sel
	mov es,ax
	pop ax
	mov ds:fat_type,fat16
	call get_param16
	xor esi,esi
;
	pop es
	retf32
mount16	ENDP

;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;
;
;		NAME:			MOUNT32
;
;		DESCRIPTION:	Mount FAT32 on a drive
;
;		RETRUNS:		DS:SI		ADDRESS TO DRIVE DATA
;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

mount32	PROC far
	push es
;
	push ax
	mov eax,SIZE drive_data_seg
	AllocateSmallGlobalMem
	mov ax,es
	mov ds,ax
	mov ax,flat_sel
	mov es,ax
	pop ax
	mov ds:fat_type,fat32
	call get_param32
	xor esi,esi
;
	pop es
	retf32
mount32	ENDP

;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;
;
;		NAME:			FLUSH
;
;		DESCRIPTION:	Flush filesystem
;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

flush	PROC far
	clc
	retf32
flush	ENDP

;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;
;
;		NAME:			DISMOUNT
;
;		DESCRIPTION:	Dismount filesystem
;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

dismount	PROC far
	retf32
dismount	ENDP

;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;
;
;		NAME:			GET_DRIVE_INFO
;
;		DESCRIPTION:	Read info from drive
;
;		RETURNS:		EAX		FREE UNITS
;						CX		BYTES / UNIT
;						EDX		TOTAL UNITS
;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

get_drive_info	PROC far
    mov eax,ds:free_clusters
	mov edx,ds:clusters
	mov cl,ds:fat_cluster_shift
	shl eax,cl
	shl edx,cl
	mov cx,200h
	clc
	retf32
get_drive_info	ENDP


;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;
;
;		NAME:			GET_IOCTL_DATA
;
;		DESCRIPTION:	Get IOCTL data
;
;		PARAMETERS:		BX			HANDLE
;
;		RETURNS:		DX			IOCTL_DATA
;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

get_ioctl_data	PROC far
	movzx dx,al
	or dx,40h
	retf32
get_ioctl_data	ENDP


;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;	
;
;		NAME:			init
;
;		DESCRIPTION:	init device
;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

dummy	Proc far
	stc
	retf32
dummy	Endp

fs12_name	DB 'FAT12',0

fs12_ctrl:
f12s00	DD OFFSET format12,			SEG code
f12s01	DD OFFSET mount12,			SEG code
f12s02	DD OFFSET flush,			SEG code
f12s03	DD OFFSET dismount,			SEG code
f12s04	DD OFFSET get_drive_info,	SEG code
f12s05	DD OFFSET allocate_dir_sel,	SEG code
f12s06	DD OFFSET free_dir_sel,		SEG code
f12s07	DD OFFSET cache_dir12_16,	SEG code
f12s08	DD OFFSET update_dir,		SEG code
f12s09	DD OFFSET update_file,		SEG code
f12s10	DD OFFSET create_dir,		SEG code
f12s11	DD OFFSET delete_dir,		SEG code
f12s12	DD OFFSET delete_file,		SEG code
f12s13	DD OFFSET rename_file,		SEG code
f12s14	DD OFFSET create_file,		SEG code
f12s15	DD OFFSET get_ioctl_data,	SEG code
f12s16	DD OFFSET set_file_size,	SEG code
f12s17	DD OFFSET dummy,			SEG code
f12s18	DD OFFSET dummy,			SEG code
f12s19	DD OFFSET allocate_file_list,SEG code
f12s20	DD OFFSET free_file_list,	SEG code
f12s21	DD OFFSET read_file_block,	SEG code
f12s22	DD OFFSET write_file_block,	SEG code

fs16_name	DB 'FAT16',0

fs16_ctrl:
f16s00	DD OFFSET format16,			SEG code
f16s01	DD OFFSET mount16,			SEG code
f16s02	DD OFFSET flush,			SEG code
f16s03	DD OFFSET dismount,			SEG code
f16s04	DD OFFSET get_drive_info,	SEG code
f16s05	DD OFFSET allocate_dir_sel,	SEG code
f16s06	DD OFFSET free_dir_sel,		SEG code
f16s07	DD OFFSET cache_dir12_16,	SEG code
f16s08	DD OFFSET update_dir,		SEG code
f16s09	DD OFFSET update_file,		SEG code
f16s10	DD OFFSET create_dir,		SEG code
f16s11	DD OFFSET delete_dir,		SEG code
f16s12	DD OFFSET delete_file,		SEG code
f16s13	DD OFFSET rename_file,		SEG code
f16s14	DD OFFSET create_file,		SEG code
f16s15	DD OFFSET get_ioctl_data,	SEG code
f16s16	DD OFFSET set_file_size,	SEG code
f16s17	DD OFFSET dummy,			SEG code
f16s18	DD OFFSET dummy,			SEG code
f16s19	DD OFFSET allocate_file_list,SEG code
f16s20	DD OFFSET free_file_list,	SEG code
f16s21	DD OFFSET read_file_block,	SEG code
f16s22	DD OFFSET write_file_block,	SEG code

fs32_name	DB 'FAT32',0

fs32_ctrl:
f32s00	DD OFFSET format32,			SEG code
f32s01	DD OFFSET mount32,			SEG code
f32s02	DD OFFSET flush,			SEG code
f32s03	DD OFFSET dismount,			SEG code
f32s04	DD OFFSET get_drive_info,	SEG code
f32s05	DD OFFSET allocate_dir_sel,	SEG code
f32s06	DD OFFSET free_dir_sel,		SEG code
f32s07	DD OFFSET cache_dir32,		SEG code
f32s08	DD OFFSET update_dir,		SEG code
f32s09	DD OFFSET update_file,		SEG code
f32s10	DD OFFSET create_dir,		SEG code
f32s11	DD OFFSET delete_dir,		SEG code
f32s12	DD OFFSET delete_file,		SEG code
f32s13	DD OFFSET rename_file,		SEG code
f32s14	DD OFFSET create_file,		SEG code
f32s15	DD OFFSET get_ioctl_data,	SEG code
f32s16	DD OFFSET set_file_size,	SEG code
f32s17	DD OFFSET dummy,			SEG code
f32s18	DD OFFSET dummy,			SEG code
f32s19	DD OFFSET allocate_file_list,SEG code
f32s20	DD OFFSET free_file_list,	SEG code
f32s21	DD OFFSET read_file_block,	SEG code
f32s22	DD OFFSET write_file_block,	SEG code

init	PROC far
	mov ax,cs
	mov ds,ax
	mov es,ax
;
	mov esi,OFFSET fs12_name
	mov edi,OFFSET fs12_ctrl
	RegisterFileSystem
;
	mov esi,OFFSET fs16_name
	mov edi,OFFSET fs16_ctrl
	RegisterFileSystem
;
	mov esi,OFFSET fs32_name
	mov edi,OFFSET fs32_ctrl
	RegisterFileSystem
	clc
	ret
init	ENDP

code	ENDS

	END init