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kolibrios/kernel/trunk/blkdev/cd_drv.inc
Alexey Teplov ( 7ac27a2f61 I'm not sure what all my change is right. 
Some optimization.

git-svn-id: svn://kolibrios.org@1276 a494cfbc-eb01-0410-851d-a64ba20cac60
2009-11-20 02:36:08 +00:00

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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; ;;
;; Copyright (C) KolibriOS team 2004-2007. All rights reserved. ;;
;; Distributed under terms of the GNU General Public License ;;
;; ;;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
$Revision$
;**********************************************************
; Íåïîñðåäñòâåííàÿ ðàáîòà ñ óñòðîéñòâîì ÑD (ATAPI)
;**********************************************************
; Àâòîð ÷àñòè èñõîäíîãî òåêñòà Êóëàêîâ Âëàäèìèð Ãåííàäüåâè÷
; Àäàïòàöèÿ, äîðàáîòêà è ðàçðàáîòêà Mario79,<Lrz>
; Ìàêñèìàëüíîå êîëè÷åñòâî ïîâòîðåíèé îïåðàöèè ÷òåíèÿ
MaxRetr equ 10
; Ïðåäåëüíîå âðåìÿ îæèäàíèÿ ãîòîâíîñòè ê ïðèåìó êîìàíäû
; (â òèêàõ)
BSYWaitTime equ 1000 ;2
NoTickWaitTime equ 0xfffff
CDBlockSize equ 2048
;********************************************
;* ×ÒÅÍÈÅ ÑÅÊÒÎÐÀ Ñ ÏÎÂÒÎÐÀÌÈ *
;* Ìíîãîêðàòíîå ïîâòîðåíèå ÷òåíèÿ ïðè ñáîÿõ *
;********************************************
ReadCDWRetr:
;-----------------------------------------------------------
; input : eax = block to read
; ebx = destination
;-----------------------------------------------------------
pushad
mov eax,[CDSectorAddress]
mov ebx,[CDDataBuf_pointer]
call cd_calculate_cache
xor edi,edi
add esi,8
inc edi
.hdreadcache:
; cmp dword [esi+4],0 ; empty
; je .nohdcache
cmp [esi],eax ; correct sector
je .yeshdcache
.nohdcache:
add esi,8
inc edi
dec ecx
jnz .hdreadcache
call find_empty_slot_CD_cache ; ret in edi
push edi
push eax
call cd_calculate_cache_2
shl edi,11
add edi,eax
mov [CDDataBuf_pointer],edi
pop eax
pop edi
call ReadCDWRetr_1
cmp [DevErrorCode],0
jne .exit
mov [CDDataBuf_pointer],ebx
call cd_calculate_cache_1
lea esi,[edi*8+esi]
mov [esi],eax ; sector number
; mov dword [esi+4],1 ; hd read - mark as same as in hd
.yeshdcache:
mov esi,edi
shl esi,11 ;9
push eax
call cd_calculate_cache_2
add esi,eax
pop eax
mov edi,ebx ;[CDDataBuf_pointer]
mov ecx,512 ;/4
cld
rep movsd ; move data
.exit:
popad
ret
ReadCDWRetr_1:
pushad
; Öèêë, ïîêà êîìàíäà íå âûïîëíåíà óñïåøíî èëè íå
; èñ÷åðïàíî êîëè÷åñòâî ïîïûòîê
mov ECX,MaxRetr
@@NextRetr:
; Ïîäàòü êîìàíäó
;*************************************************
;* ÏÎËÍÎÅ ×ÒÅÍÈÅ ÑÅÊÒÎÐÀ ÊÎÌÏÀÊÒ-ÄÈÑÊÀ *
;* Ñ÷èòûâàþòñÿ äàííûå ïîëüçîâàòåëÿ, èíôîðìàöèÿ *
;* ñóáêàíàëà è êîíòðîëüíàÿ èíôîðìàöèÿ *
;* Âõîäíûå ïàðàìåòðû ïåðåäàþòñÿ ÷åðåç ãëîáàëüíûå *
;* ïåðìåííûå: *
;* ChannelNumber - íîìåð êàíàëà; *
;* DiskNumber - íîìåð äèñêà íà êàíàëå; *
;* CDSectorAddress - àäðåñ ñ÷èòûâàåìîãî ñåêòîðà. *
;* Äàííûå ñ÷èòûâàåòñÿ â ìàññèâ CDDataBuf. *
;*************************************************
;ReadCD:
push ecx
; pusha
; Çàäàòü ðàçìåð ñåêòîðà
; mov [CDBlockSize],2048 ;2352
; Î÷èñòèòü áóôåð ïàêåòíîé êîìàíäû
call clear_packet_buffer
; Ñôîðìèðîâàòü ïàêåòíóþ êîìàíäó äëÿ ñ÷èòûâàíèÿ
; ñåêòîðà äàííûõ
; Çàäàòü êîä êîìàíäû Read CD
mov [PacketCommand],byte 0x28 ;0xBE
; Çàäàòü àäðåñ ñåêòîðà
mov AX,word [CDSectorAddress+2]
xchg AL,AH
mov word [PacketCommand+2],AX
mov AX,word [CDSectorAddress]
xchg AL,AH
mov word [PacketCommand+4],AX
; mov eax,[CDSectorAddress]
; mov [PacketCommand+2],eax
; Çàäàòü êîëè÷åñòâî ñ÷èòûâàåìûõ ñåêòîðîâ
mov [PacketCommand+8],byte 1
; Çàäàòü ñ÷èòûâàíèå äàííûõ â ïîëíîì îáúåìå
; mov [PacketCommand+9],byte 0xF8
; Ïîäàòü êîìàíäó
call SendPacketDatCommand
pop ecx
; ret
; cmp [DevErrorCode],0
test eax,eax
jz @@End_4
or ecx,ecx ;{SPraid.simba} (for cd load)
jz @@End_4
dec ecx
cmp [timer_ticks_enable],0
jne @f
mov eax,NoTickWaitTime
.wait:
dec eax
; test eax,eax
jz @@NextRetr
jmp .wait
@@:
; Çàäåðæêà íà 2,5 ñåêóíäû
; mov EAX,[timer_ticks]
; add EAX,50 ;250
;@@Wait:
; call change_task
; cmp EAX,[timer_ticks]
; ja @@Wait
loop @@NextRetr
@@End_4:
mov dword [DevErrorCode],eax
popad
ret
; Óíèâåðñàëüíûå ïðîöåäóðû, îáåñïå÷èâàþùèå âûïîëíåíèå
; ïàêåòíûõ êîìàíä â ðåæèìå PIO
; Ìàêñèìàëüíî äîïóñòèìîå âðåìÿ îæèäàíèÿ ðåàêöèè
; óñòðîéñòâà íà ïàêåòíóþ êîìàíäó (â òèêàõ)
MaxCDWaitTime equ 1000 ;200 ;10 ñåêóíä
uglobal
; Îáëàñòü ïàìÿòè äëÿ ôîðìèðîâàíèÿ ïàêåòíîé êîìàíäû
PacketCommand: rb 12 ;DB 12 DUP (?)
; Îáëàñòü ïàìÿòè äëÿ ïðèåìà äàííûõ îò äèñêîâîäà
;CDDataBuf DB 4096 DUP (0)
; Ðàçìåð ïðèíèìàåìîãî áëîêà äàííûõ â áàéòàõ
;CDBlockSize DW ?
; Àäðåñ ñ÷èòûâàåìîãî ñåêòîðà äàííûõ
CDSectorAddress: DD ?
; Âðåìÿ íà÷àëà î÷åðåäíîé îïåðàöèè ñ äèñêîì
TickCounter_1 DD 0
; Âðåìÿ íà÷àëà îæèäàíèÿ ãîòîâíîñòè óñòðîéñòâà
WURStartTime DD 0
; óêàçàòåëü áóôåðà äëÿ ñ÷èòûâàíèÿ
CDDataBuf_pointer dd 0
endg
;****************************************************
;* ÏÎÑËÀÒÜ ÓÑÒÐÎÉÑÒÂÓ ATAPI ÏÀÊÅÒÍÓÞ ÊÎÌÀÍÄÓ, *
;* ÏÐÅÄÓÑÌÀÒÐÈÂÀÞÙÓÞ ÏÅÐÅÄÀ×Ó ÎÄÍÎÃÎ ÑÅÊÒÎÐÀ ÄÀÍÍÛÕ *
;* ÐÀÇÌÅÐÎÌ 2048 ÁÀÉÒ ÎÒ ÓÑÒÐÎÉÑÒÂÀ Ê ÕÎÑÒÓ *
;* Âõîäíûå ïàðàìåòðû ïåðåäàþòñÿ ÷åðåç ãëîáàëüíûå *
;* ïåðìåííûå: *
;* ChannelNumber - íîìåð êàíàëà; *
;* DiskNumber - íîìåð äèñêà íà êàíàëå; *
;* PacketCommand - 12-áàéòíûé êîìàíäíûé ïàêåò; *
;* CDBlockSize - ðàçìåð ïðèíèìàåìîãî áëîêà äàííûõ. *
; return eax DevErrorCode
;****************************************************
SendPacketDatCommand:
xor eax,eax
; mov byte [DevErrorCode],al
; Çàäàòü ðåæèì CHS
mov byte [ATAAddressMode],al
; Ïîñëàòü ATA-êîìàíäó ïåðåäà÷è ïàêåòíîé êîìàíäû
mov byte [ATAFeatures],al
mov byte [ATASectorCount],al
mov byte [ATASectorNumber],al
; Çàãðóçèòü ðàçìåð ïåðåäàâàåìîãî áëîêà
mov [ATAHead],al
; mov AX,[CDBlockSize]
mov [ATACylinder],CDBlockSize
mov [ATACommand],0A0h
call SendCommandToHDD_1
test eax,eax
; cmp [DevErrorCode],0 ;ïðîâåðèòü êîä îøèáêè
jnz @@End_8 ;çàêîí÷èòü, ñîõðàíèâ êîä îøèáêè
; Îæèäàíèå ãîòîâíîñòè äèñêîâîäà ê ïðèåìó
; ïàêåòíîé êîìàíäû
mov DX,[ATABasePortAddr]
add DX,7 ;ïîðò 1õ7h
mov ecx,NoTickWaitTime
@@WaitDevice0:
cmp [timer_ticks_enable],0
jne @f
dec ecx
; test ecx,ecx
jz @@Err1_1
jmp .test
@@:
call change_task
; Ïðîâåðèòü âðåìÿ âûïîëíåíèÿ êîìàíäû
mov EAX,[timer_ticks]
sub EAX,[TickCounter_1]
cmp EAX,BSYWaitTime
ja @@Err1_1 ;îøèáêà òàéì-àóòà
; Ïðîâåðèòü ãîòîâíîñòü
.test:
in AL,DX
test AL,80h ;ñîñòîÿíèå ñèãíàëà BSY
jnz @@WaitDevice0
test AL,08h ;ñîñòîÿíèå ñèãíàëà DRQ
jz @@WaitDevice0
test AL,1 ;ñîñòîÿíèå ñèãíàëà ERR
jnz @@Err6
; Ïîñëàòü ïàêåòíóþ êîìàíäó
cli
mov DX,[ATABasePortAddr]
mov AX,[PacketCommand]
out DX,AX
mov AX,[PacketCommand+2]
out DX,AX
mov AX,[PacketCommand+4]
out DX,AX
mov AX,[PacketCommand+6]
out DX,AX
mov AX,[PacketCommand+8]
out DX,AX
mov AX,[PacketCommand+10]
out DX,AX
sti
; Îæèäàíèå ãîòîâíîñòè äàííûõ
mov DX,[ATABasePortAddr]
add DX,7 ;ïîðò 1õ7h
mov ecx,NoTickWaitTime
@@WaitDevice1:
cmp [timer_ticks_enable],0
jne @f
dec ecx
; test ecx,ecx
jz @@Err1_1
jmp .test_1
@@:
call change_task
; Ïðîâåðèòü âðåìÿ âûïîëíåíèÿ êîìàíäû
mov EAX,[timer_ticks]
sub EAX,[TickCounter_1]
cmp EAX,MaxCDWaitTime
ja @@Err1_1 ;îøèáêà òàéì-àóòà
; Ïðîâåðèòü ãîòîâíîñòü
.test_1:
in AL,DX
test AL,80h ;ñîñòîÿíèå ñèãíàëà BSY
jnz @@WaitDevice1
test AL,08h ;ñîñòîÿíèå ñèãíàëà DRQ
jz @@WaitDevice1
test AL,1 ;ñîñòîÿíèå ñèãíàëà ERR
jnz @@Err6_temp
; Ïðèíÿòü áëîê äàííûõ îò êîíòðîëëåðà
mov EDI,[CDDataBuf_pointer] ;0x7000 ;CDDataBuf
; Çàãðóçèòü àäðåñ ðåãèñòðà äàííûõ êîíòðîëëåðà
mov DX,[ATABasePortAddr] ;ïîðò 1x0h
; Çàãðóçèòü â ñ÷åò÷èê ðàçìåð áëîêà â áàéòàõ
xor ecx,ecx
mov CX,CDBlockSize
; Âû÷èñëèòü ðàçìåð áëîêà â 16-ðàçðÿäíûõ ñëîâàõ
shr CX,1 ;ðàçäåëèòü ðàçìåð áëîêà íà 2
; Ïðèíÿòü áëîê äàííûõ
cli
cld
rep insw
sti
; Óñïåøíîå çàâåðøåíèå ïðèåìà äàííûõ
@@End_8:
xor eax,eax
ret
; Çàïèñàòü êîä îøèáêè
@@Err1_1:
xor eax,eax
inc eax
ret
; mov [DevErrorCode],1
; ret
@@Err6_temp:
mov eax,7
ret
; mov [DevErrorCode],7
; ret
@@Err6:
mov eax,6
ret
; mov [DevErrorCode],6
;@@End_8:
; ret
;***********************************************
;* ÏÎÑËÀÒÜ ÓÑÒÐÎÉÑÒÂÓ ATAPI ÏÀÊÅÒÍÓÞ ÊÎÌÀÍÄÓ, *
;* ÍÅ ÏÐÅÄÓÑÌÀÒÐÈÂÀÞÙÓÞ ÏÅÐÅÄÀ×È ÄÀÍÍÛÕ *
;* Âõîäíûå ïàðàìåòðû ïåðåäàþòñÿ ÷åðåç *
;* ãëîáàëüíûå ïåðìåííûå: *
;* ChannelNumber - íîìåð êàíàëà; *
;* DiskNumber - íîìåð äèñêà íà êàíàëå; *
;* PacketCommand - 12-áàéòíûé êîìàíäíûé ïàêåò. *
;***********************************************
SendPacketNoDatCommand:
pushad
xor eax,eax
; mov byte [DevErrorCode],al
; Çàäàòü ðåæèì CHS
mov byte [ATAAddressMode],al
; Ïîñëàòü ATA-êîìàíäó ïåðåäà÷è ïàêåòíîé êîìàíäû
mov byte [ATAFeatures],al
mov byte [ATASectorCount],al
mov byte [ATASectorNumber],al
mov word [ATACylinder],ax
mov byte [ATAHead],al
mov [ATACommand],0A0h
call SendCommandToHDD_1
; cmp [DevErrorCode],0 ;ïðîâåðèòü êîä îøèáêè
test eax,eax
jnz @@End_9 ;çàêîí÷èòü, ñîõðàíèâ êîä îøèáêè
; Îæèäàíèå ãîòîâíîñòè äèñêîâîäà ê ïðèåìó
; ïàêåòíîé êîìàíäû
mov DX,[ATABasePortAddr]
add DX,7 ;ïîðò 1õ7h
@@WaitDevice0_1:
call change_task
; Ïðîâåðèòü âðåìÿ îæèäàíèÿ
mov EAX,[timer_ticks]
sub EAX,[TickCounter_1]
cmp EAX,BSYWaitTime
ja @@Err1_3 ;îøèáêà òàéì-àóòà
; Ïðîâåðèòü ãîòîâíîñòü
in AL,DX
test AL,80h ;ñîñòîÿíèå ñèãíàëà BSY
jnz @@WaitDevice0_1
test AL,1 ;ñîñòîÿíèå ñèãíàëà ERR
jnz @@Err6_1
test AL,08h ;ñîñòîÿíèå ñèãíàëà DRQ
jz @@WaitDevice0_1
; Ïîñëàòü ïàêåòíóþ êîìàíäó
; cli
mov DX,[ATABasePortAddr]
mov AX,word [PacketCommand]
out DX,AX
mov AX,word [PacketCommand+2]
out DX,AX
mov AX,word [PacketCommand+4]
out DX,AX
mov AX,word [PacketCommand+6]
out DX,AX
mov AX,word [PacketCommand+8]
out DX,AX
mov AX,word [PacketCommand+10]
out DX,AX
; sti
cmp [ignore_CD_eject_wait],1
je @@clear_DEC
; Îæèäàíèå ïîäòâåðæäåíèÿ ïðèåìà êîìàíäû
mov DX,[ATABasePortAddr]
add DX,7 ;ïîðò 1õ7h
@@WaitDevice1_1:
call change_task
; Ïðîâåðèòü âðåìÿ âûïîëíåíèÿ êîìàíäû
mov EAX,[timer_ticks]
sub EAX,[TickCounter_1]
cmp EAX,MaxCDWaitTime
ja @@Err1_3 ;îøèáêà òàéì-àóòà
; Îæèäàòü îñâîáîæäåíèÿ óñòðîéñòâà
in AL,DX
test AL,80h ;ñîñòîÿíèå ñèãíàëà BSY
jnz @@WaitDevice1_1
test AL,1 ;ñîñòîÿíèå ñèãíàëà ERR
jnz @@Err6_1
test AL,40h ;ñîñòîÿíèå ñèãíàëà DRDY
jz @@WaitDevice1_1
@@clear_DEC:
and [DevErrorCode],0
popad
ret
; Çàïèñàòü êîä îøèáêè
@@Err1_3:
xor eax,eax
inc eax
jmp @@End_9
@@Err6_1:
mov eax,6
@@End_9:
mov [DevErrorCode],eax
popad
ret
;****************************************************
;* ÏÎÑËÀÒÜ ÊÎÌÀÍÄÓ ÇÀÄÀÍÍÎÌÓ ÄÈÑÊÓ *
;* Âõîäíûå ïàðàìåòðû ïåðåäàþòñÿ ÷åðåç ãëîáàëüíûå *
;* ïåðåìåííûå: *
;* ChannelNumber - íîìåð êàíàëà (1 èëè 2); *
;* DiskNumber - íîìåð äèñêà (0 èëè 1); *
;* ATAFeatures - "îñîáåííîñòè"; *
;* ATASectorCount - êîëè÷åñòâî ñåêòîðîâ; *
;* ATASectorNumber - íîìåð íà÷àëüíîãî ñåêòîðà; *
;* ATACylinder - íîìåð íà÷àëüíîãî öèëèíäðà; *
;* ATAHead - íîìåð íà÷àëüíîé ãîëîâêè; *
;* ATAAddressMode - ðåæèì àäðåñàöèè (0-CHS, 1-LBA); *
;* ATACommand - êîä êîìàíäû. *
;* Ïîñëå óñïåøíîãî âûïîëíåíèÿ ôóíêöèè: *
;* â ATABasePortAddr - áàçîâûé àäðåñ HDD; *
;* â DevErrorCode - íîëü. *
;* Ïðè âîçíèêíîâåíèè îøèáêè â DevErrorCode áóäåò *
;* âîçâðàùåí êîä îøèáêè â eax *
;****************************************************
SendCommandToHDD_1:
; pushad
; mov [DevErrorCode],0 not need
; Ïðîâåðèòü çíà÷åíèå êîäà ðåæèìà
cmp [ATAAddressMode],1
ja @@Err2_4
; Ïðîâåðèòü êîððåêòíîñòü íîìåðà êàíàëà
mov BX,[ChannelNumber]
cmp BX,1
jb @@Err3_4
cmp BX,2
ja @@Err3_4
; Óñòàíîâèòü áàçîâûé àäðåñ
dec BX
shl BX,1
movzx ebx,bx
mov AX,[ebx+StandardATABases]
mov [ATABasePortAddr],AX
; Îæèäàíèå ãîòîâíîñòè HDD ê ïðèåìó êîìàíäû
; Âûáðàòü íóæíûé äèñê
mov DX,[ATABasePortAddr]
add DX,6 ;àäðåñ ðåãèñòðà ãîëîâîê
mov AL,[DiskNumber]
cmp AL,1 ;ïðîâåðèòü íîìåðà äèñêà
ja @@Err4_4
shl AL,4
or AL,10100000b
out DX,AL
; Îæèäàòü, ïîêà äèñê íå áóäåò ãîòîâ
inc DX
mov eax,[timer_ticks]
mov [TickCounter_1],eax
mov ecx,NoTickWaitTime
@@WaitHDReady_2:
cmp [timer_ticks_enable],0
jne @f
dec ecx
; test ecx,ecx
jz @@Err1_4
jmp .test
@@:
call change_task
; Ïðîâåðèòü âðåìÿ îæèäàíèÿ
mov eax,[timer_ticks]
sub eax,[TickCounter_1]
cmp eax,BSYWaitTime ;300 ;îæèäàòü 3 ñåê.
ja @@Err1_4 ;îøèáêà òàéì-àóòà
; Ïðî÷èòàòü ðåãèñòð ñîñòîÿíèÿ
.test:
in AL,DX
; Ïðîâåðèòü ñîñòîÿíèå ñèãíàëà BSY
test AL,80h
jnz @@WaitHDReady_2
; Ïðîâåðèòü ñîñòîÿíèå ñèãíàëà DRQ
test AL,08h
jnz @@WaitHDReady_2
; Çàãðóçèòü êîìàíäó â ðåãèñòðû êîíòðîëëåðà
cli
mov DX,[ATABasePortAddr]
inc DX ;ðåãèñòð "îñîáåííîñòåé"
mov AL,[ATAFeatures]
out DX,AL
inc DX ;ñ÷åò÷èê ñåêòîðîâ
mov AL,[ATASectorCount]
out DX,AL
inc DX ;ðåãèñòð íîìåðà ñåêòîðà
mov AL,[ATASectorNumber]
out DX,AL
inc DX ;íîìåð öèëèíäðà (ìëàäøèé áàéò)
mov AX,[ATACylinder]
out DX,AL
inc DX ;íîìåð öèëèíäðà (ñòàðøèé áàéò)
mov AL,AH
out DX,AL
inc DX ;íîìåð ãîëîâêè/íîìåð äèñêà
mov AL,[DiskNumber]
shl AL,4
cmp [ATAHead],0Fh ;ïðîâåðèòü íîìåð ãîëîâêè
ja @@Err5_4
or AL,[ATAHead]
or AL,10100000b
mov AH,[ATAAddressMode]
shl AH,6
or AL,AH
out DX,AL
; Ïîñëàòü êîìàíäó
mov AL,[ATACommand]
inc DX ;ðåãèñòð êîìàíä
out DX,AL
sti
; Ñáðîñèòü ïðèçíàê îøèáêè
; mov [DevErrorCode],0
@@End_10:
xor eax,eax
ret
; Çàïèñàòü êîä îøèáêè
@@Err1_4:
xor eax,eax
inc eax
; mov [DevErrorCode],1
ret
@@Err2_4:
mov eax,2
; mov [DevErrorCode],2
ret
@@Err3_4:
mov eax,3
; mov [DevErrorCode],3
ret
@@Err4_4:
mov eax,4
; mov [DevErrorCode],4
ret
@@Err5_4:
mov eax,5
; mov [DevErrorCode],5
; Çàâåðøåíèå ðàáîòû ïðîãðàììû
ret
; sti
; popad
;*************************************************
;* ÎÆÈÄÀÍÈÅ ÃÎÒÎÂÍÎÑÒÈ ÓÑÒÐÎÉÑÒÂÀ Ê ÐÀÁÎÒÅ *
;* Âõîäíûå ïàðàìåòðû ïåðåäàþòñÿ ÷åðåç ãëîáàëüíûå *
;* ïåðìåííûå: *
;* ChannelNumber - íîìåð êàíàëà; *
;* DiskNumber - íîìåð äèñêà íà êàíàëå. *
;*************************************************
WaitUnitReady:
pusha
; Çàïîìíèòü âðåìÿ íà÷àëà îïåðàöèè
mov EAX,[timer_ticks]
mov [WURStartTime],EAX
; Î÷èñòèòü áóôåð ïàêåòíîé êîìàíäû
call clear_packet_buffer
; Ñôîðìèðîâàòü êîìàíäó TEST UNIT READY
mov [PacketCommand],word 00h
; ÖÈÊË ÎÆÈÄÀÍÈß ÃÎÒÎÂÍÎÑÒÈ ÓÑÒÐÎÉÑÒÂÀ
mov ecx,NoTickWaitTime
@@SendCommand:
; Ïîäàòü êîìàíäó ïðîâåðêè ãîòîâíîñòè
call SendPacketNoDatCommand
cmp [timer_ticks_enable],0
jne @f
cmp [DevErrorCode],0
je @@End_11
dec ecx
; cmp ecx,0
jz .Error
jmp @@SendCommand
@@:
call change_task
; Ïðîâåðèòü êîä îøèáêè
cmp [DevErrorCode],0
je @@End_11
; Ïðîâåðèòü âðåìÿ îæèäàíèÿ ãîòîâíîñòè
mov EAX,[timer_ticks]
sub EAX,[WURStartTime]
cmp EAX,MaxCDWaitTime
jb @@SendCommand
.Error:
; Îøèáêà òàéì-àóòà
mov [DevErrorCode],1
@@End_11:
popa
ret
;*************************************************
;* ÇÀÏÐÅÒÈÒÜ ÑÌÅÍÓ ÄÈÑÊÀ *
;* Âõîäíûå ïàðàìåòðû ïåðåäàþòñÿ ÷åðåç ãëîáàëüíûå *
;* ïåðìåííûå: *
;* ChannelNumber - íîìåð êàíàëà; *
;* DiskNumber - íîìåð äèñêà íà êàíàëå. *
;*************************************************
prevent_medium_removal:
pusha
; Î÷èñòèòü áóôåð ïàêåòíîé êîìàíäû
call clear_packet_buffer
; Çàäàòü êîä êîìàíäû
mov [PacketCommand],byte 0x1E
; Çàäàòü êîä çàïðåòà
mov [PacketCommand+4],byte 11b
; Ïîäàòü êîìàíäó
call SendPacketNoDatCommand
mov eax,ATAPI_IDE0_lock
add eax,[cdpos]
dec eax
mov [eax],byte 1
popa
ret
;*************************************************
;* ÐÀÇÐÅØÈÒÜ ÑÌÅÍÓ ÄÈÑÊÀ *
;* Âõîäíûå ïàðàìåòðû ïåðåäàþòñÿ ÷åðåç ãëîáàëüíûå *
;* ïåðìåííûå: *
;* ChannelNumber - íîìåð êàíàëà; *
;* DiskNumber - íîìåð äèñêà íà êàíàëå. *
;*************************************************
allow_medium_removal:
pusha
; Î÷èñòèòü áóôåð ïàêåòíîé êîìàíäû
call clear_packet_buffer
; Çàäàòü êîä êîìàíäû
mov [PacketCommand],byte 0x1E
; Çàäàòü êîä çàïðåòà
mov [PacketCommand+4],byte 00b
; Ïîäàòü êîìàíäó
call SendPacketNoDatCommand
mov eax,ATAPI_IDE0_lock
add eax,[cdpos]
dec eax
mov [eax],byte 0
popa
ret
;*************************************************
;* ÇÀÃÐÓÇÈÒÜ ÍÎÑÈÒÅËÜ Â ÄÈÑÊÎÂÎÄ *
;* Âõîäíûå ïàðàìåòðû ïåðåäàþòñÿ ÷åðåç ãëîáàëüíûå *
;* ïåðìåííûå: *
;* ChannelNumber - íîìåð êàíàëà; *
;* DiskNumber - íîìåð äèñêà íà êàíàëå. *
;*************************************************
LoadMedium:
pusha
; Î÷èñòèòü áóôåð ïàêåòíîé êîìàíäû
call clear_packet_buffer
; Ñôîðìèðîâàòü êîìàíäó START/STOP UNIT
; Çàäàòü êîä êîìàíäû
mov [PacketCommand],word 1Bh
; Çàäàòü îïåðàöèþ çàãðóçêè íîñèòåëÿ
mov [PacketCommand+4],word 00000011b
; Ïîäàòü êîìàíäó
call SendPacketNoDatCommand
popa
ret
;*************************************************
;* ÈÇÂËÅ×Ü ÍÎÑÈÒÅËÜ ÈÇ ÄÈÑÊÎÂÎÄÀ *
;* Âõîäíûå ïàðàìåòðû ïåðåäàþòñÿ ÷åðåç ãëîáàëüíûå *
;* ïåðìåííûå: *
;* ChannelNumber - íîìåð êàíàëà; *
;* DiskNumber - íîìåð äèñêà íà êàíàëå. *
;*************************************************
EjectMedium:
pusha
; Î÷èñòèòü áóôåð ïàêåòíîé êîìàíäû
call clear_packet_buffer
; Ñôîðìèðîâàòü êîìàíäó START/STOP UNIT
; Çàäàòü êîä êîìàíäû
mov [PacketCommand],word 1Bh
; Çàäàòü îïåðàöèþ èçâëå÷åíèÿ íîñèòåëÿ
mov [PacketCommand+4],word 00000010b
; Ïîäàòü êîìàíäó
call SendPacketNoDatCommand
popa
ret
;*************************************************
;* Ïðîâåðèòü ñîáûòèå íàæàòèÿ êíîïêè èçâëå÷åíèÿ *
;* äèñêà *
;* Âõîäíûå ïàðàìåòðû ïåðåäàþòñÿ ÷åðåç ãëîáàëüíûå *
;* ïåðåìåííûå: *
;* ChannelNumber - íîìåð êàíàëà; *
;* DiskNumber - íîìåð äèñêà íà êàíàëå. *
;*************************************************
align 4
check_ATAPI_device_event:
pusha
mov eax,[timer_ticks]
sub eax,[timer_ATAPI_check]
cmp eax,100
jb .end_1
mov al,[DRIVE_DATA+1]
and al,11b
cmp al,10b
jz .ide3
.ide2_1:
mov al,[DRIVE_DATA+1]
and al,1100b
cmp al,1000b
jz .ide2
.ide1_1:
mov al,[DRIVE_DATA+1]
and al,110000b
cmp al,100000b
jz .ide1
.ide0_1:
mov al,[DRIVE_DATA+1]
and al,11000000b
cmp al,10000000b
jz .ide0
.end:
sti
mov eax,[timer_ticks]
mov [timer_ATAPI_check],eax
.end_1:
popa
ret
.ide3:
cli
cmp [ATAPI_IDE3_lock],1
jne .ide2_1
cmp [IDE_Channel_2],0
jne .ide1_1
cmp [cd_status],0
jne .end
mov [IDE_Channel_2],1
call reserve_ok2
mov [ChannelNumber],2
mov [DiskNumber],1
mov [cdpos],4
call GetEvent_StatusNotification
cmp [CDDataBuf+4],byte 1
je .eject_ide3
call syscall_cdaudio.free
jmp .ide2_1
.eject_ide3:
call .eject
call syscall_cdaudio.free
jmp .ide2_1
.ide2:
cli
cmp [ATAPI_IDE2_lock],1
jne .ide1_1
cmp [IDE_Channel_2],0
jne .ide1_1
cmp [cd_status],0
jne .end
mov [IDE_Channel_2],1
call reserve_ok2
mov [ChannelNumber],2
mov [DiskNumber],0
mov [cdpos],3
call GetEvent_StatusNotification
cmp [CDDataBuf+4],byte 1
je .eject_ide2
call syscall_cdaudio.free
jmp .ide1_1
.eject_ide2:
call .eject
call syscall_cdaudio.free
jmp .ide1_1
.ide1:
cli
cmp [ATAPI_IDE1_lock],1
jne .ide0_1
cmp [IDE_Channel_1],0
jne .end
cmp [cd_status],0
jne .end
mov [IDE_Channel_1],1
call reserve_ok2
mov [ChannelNumber],1
mov [DiskNumber],1
mov [cdpos],2
call GetEvent_StatusNotification
cmp [CDDataBuf+4],byte 1
je .eject_ide1
call syscall_cdaudio.free
jmp .ide0_1
.eject_ide1:
call .eject
call syscall_cdaudio.free
jmp .ide0_1
.ide0:
cli
cmp [ATAPI_IDE0_lock],1
jne .end
cmp [IDE_Channel_1],0
jne .end
cmp [cd_status],0
jne .end
mov [IDE_Channel_1],1
call reserve_ok2
mov [ChannelNumber],1
mov [DiskNumber],0
mov [cdpos],1
call GetEvent_StatusNotification
cmp [CDDataBuf+4],byte 1
je .eject_ide0
call syscall_cdaudio.free
jmp .end
.eject_ide0:
call .eject
call syscall_cdaudio.free
jmp .end
.eject:
call clear_CD_cache
call allow_medium_removal
mov [ignore_CD_eject_wait],1
call EjectMedium
mov [ignore_CD_eject_wait],0
ret
iglobal
timer_ATAPI_check dd 0
ATAPI_IDE0_lock db 0
ATAPI_IDE1_lock db 0
ATAPI_IDE2_lock db 0
ATAPI_IDE3_lock db 0
ignore_CD_eject_wait db 0
endg
;*************************************************
;* Ïîëó÷èòü ñîîáùåíèå î ñîáûòèè èëè ñîñòîÿíèè *
;* óñòðîéñòâà *
;* Âõîäíûå ïàðàìåòðû ïåðåäàþòñÿ ÷åðåç ãëîáàëüíûå *
;* ïåðåìåííûå: *
;* ChannelNumber - íîìåð êàíàëà; *
;* DiskNumber - íîìåð äèñêà íà êàíàëå. *
;*************************************************
GetEvent_StatusNotification:
pusha
mov [CDDataBuf_pointer],CDDataBuf
; Î÷èñòèòü áóôåð ïàêåòíîé êîìàíäû
call clear_packet_buffer
; Çàäàòü êîä êîìàíäû
mov [PacketCommand],byte 4Ah
mov [PacketCommand+1],byte 00000001b
; Çàäàòü çàïðîñ êëàññà ñîîáùåíèé
mov [PacketCommand+4],byte 00010000b
; Ðàçìåð âûäåëåííîé îáëàñòè
mov [PacketCommand+7],byte 8h
mov [PacketCommand+8],byte 0h
; Ïîäàòü êîìàíäó
call SendPacketDatCommand
popa
ret
;*************************************************
; ïðî÷èòàòü èíôîðìàöèþ èç TOC
;* Âõîäíûå ïàðàìåòðû ïåðåäàþòñÿ ÷åðåç ãëîáàëüíûå *
;* ïåðåìåííûå: *
;* ChannelNumber - íîìåð êàíàëà; *
;* DiskNumber - íîìåð äèñêà íà êàíàëå. *
;*************************************************
Read_TOC:
pusha
mov [CDDataBuf_pointer],CDDataBuf
; Î÷èñòèòü áóôåð ïàêåòíîé êîìàíäû
call clear_packet_buffer
; Ñôîðìèðîâàòü ïàêåòíóþ êîìàíäó äëÿ ñ÷èòûâàíèÿ
; ñåêòîðà äàííûõ
mov [PacketCommand],byte 0x43
; Çàäàòü ôîðìàò
mov [PacketCommand+2],byte 1
; Ðàçìåð âûäåëåííîé îáëàñòè
mov [PacketCommand+7],byte 0xFF
mov [PacketCommand+8],byte 0h
; Ïîäàòü êîìàíäó
call SendPacketDatCommand
popa
ret
;*************************************************
;* ÎÏÐÅÄÅËÈÒÜ ÎÁÙÅÅ ÊÎËÈ×ÅÑÒÂÎ ÑÅÊÒÎÐΠÍÀ ÄÈÑÊÅ *
;* Âõîäíûå ïàðàìåòðû ïåðåäàþòñÿ ÷åðåç ãëîáàëüíûå *
;* ïåðåìåííûå: *
;* ChannelNumber - íîìåð êàíàëà; *
;* DiskNumber - íîìåð äèñêà íà êàíàëå. *
;*************************************************
;ReadCapacity:
; pusha
;; Î÷èñòèòü áóôåð ïàêåòíîé êîìàíäû
; call clear_packet_buffer
;; Çàäàòü ðàçìåð áóôåðà â áàéòàõ
; mov [CDBlockSize],8
;; Ñôîðìèðîâàòü êîìàíäó READ CAPACITY
; mov [PacketCommand],word 25h
;; Ïîäàòü êîìàíäó
; call SendPacketDatCommand
; popa
; ret
clear_packet_buffer:
; Î÷èñòèòü áóôåð ïàêåòíîé êîìàíäû
and [PacketCommand],dword 0
and [PacketCommand+4],dword 0
and [PacketCommand+8],dword 0
ret
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