kolibrios-fun/kernel/trunk/blkdev/cdrom.inc

;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;                                                              ;;
;; Copyright (C) KolibriOS team 2004-2007. All rights reserved. ;;
;; Copyright (C) MenuetOS 2000-2004 Ville Mikael Turjanmaa      ;;
;; Distributed under terms of the GNU General Public License    ;;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

$Revision$


sys_cd_audio:

        cmp     word [cdbase], word 0
        jnz     @f
        mov     eax, 1
        ret
   @@:

     ; eax=1 cdplay at ebx 0x00FFSSMM
     ; eax=2 get tracklist size of ecx to [ebx]
     ; eax=3 stop/pause playing

        cmp     eax, 1
        jnz     nocdp
        call    sys_cdplay
        ret
   nocdp:

        cmp     eax, 2
        jnz     nocdtl
        mov     edi, [TASK_BASE]
        add     edi, TASKDATA.mem_start
        add     ebx, [edi]
        call    sys_cdtracklist
        ret
   nocdtl:

        cmp     eax, 3
        jnz     nocdpause
        call    sys_cdpause
        ret
   nocdpause:

        mov     eax, 0xffffff01
        ret



sys_cd_atapi_command:

        pushad

        mov     dx, word [cdbase]
        add     dx, 6
        mov     ax, word [cdid]
        out     dx, al
        mov     esi, 10
        call    delay_ms
        mov     dx, word [cdbase]
        add     dx, 7
        in      al, dx
        and     al, 0x80
        cmp     al, 0
        jnz     res
        jmp     cdl6
   res:
        mov     dx, word [cdbase]
        add     dx, 7
        mov     al, 0x8
        out     dx, al
        mov     dx, word [cdbase]
        add     dx, 0x206
        mov     al, 0xe
        out     dx, al
        mov     esi, 1
        call    delay_ms
        mov     dx, word [cdbase]
        add     dx, 0x206
        mov     al, 0x8
        out     dx, al
        mov     esi, 30
        call    delay_ms
        xor     cx, cx
   cdl5:
        inc     cx
        cmp     cx, 10
        jz      cdl6
        mov     dx, word [cdbase]
        add     dx, 7
        in      al, dx
        and     al, 0x88
        cmp     al, 0x00
        jz      cdl5
        mov     esi, 100
        call    delay_ms
        jmp     cdl5
   cdl6:
        mov     dx, word [cdbase]
        add     dx, 4
        mov     al, 0
        out     dx, al
        mov     dx, word [cdbase]
        add     dx, 5
        mov     al, 0
        out     dx, al
        mov     dx, word [cdbase]
        add     dx, 7
        mov     al, 0xec
        out     dx, al
        mov     esi, 5
        call    delay_ms
        mov     dx, word [cdbase]
        add     dx, 1
        mov     al, 0
        out     dx, al
        add     dx, 1
        mov     al, 0
        out     dx, al
        add     dx, 1
        mov     al, 0
        out     dx, al
        add     dx, 1
        mov     al, 0
        out     dx, al
        add     dx, 1
        mov     al, 128
        out     dx, al
        add     dx, 2
        mov     al, 0xa0
        out     dx, al
        xor     cx, cx
        mov     dx, word [cdbase]
        add     dx, 7
   cdl1:
        inc     cx
        cmp     cx, 100
        jz      cdl2
        in      al, dx
        and     ax, 0x88
        cmp     al, 0x8
        jz      cdl2
        mov     esi, 2
        call    delay_ms
        jmp     cdl1
   cdl2:

        popad
        ret


sys_cdplay:

        mov     ax, 5
        push    ax
        push    ebx
   cdplay:
        call    sys_cd_atapi_command
        cli
        mov     dx, word [cdbase]
        mov     ax, 0x0047
        out     dx, ax
        mov     al, 1
        mov     ah, [esp+0]; min xx
        out     dx, ax
        mov     ax, [esp+1]; fr sec
        out     dx, ax
        mov     ax, 256+99
        out     dx, ax
        mov     ax, 0x0001
        out     dx, ax
        mov     ax, 0x0000
        out     dx, ax
        mov     esi, 10
        call    delay_ms
        sti
        add     dx, 7
        in      al, dx
        test    al, 1
        jz      cdplayok
        mov     ax, [esp+4]
        dec     ax
        mov     [esp+4], ax
        cmp     ax, 0
        jz      cdplayfail
        jmp     cdplay
   cdplayfail:
   cdplayok:
        pop     ebx
        pop     ax
        xor     eax, eax
        ret


sys_cdtracklist:

        push    ebx
   tcdplay:
        call    sys_cd_atapi_command
        mov     dx, word [cdbase]
        mov     ax, 0x43+2*256
        out     dx, ax
        mov     ax, 0x0
        out     dx, ax
        mov     ax, 0x0
        out     dx, ax
        mov     ax, 0x0
        out     dx, ax
        mov     ax, 200
        out     dx, ax
        mov     ax, 0x0
        out     dx, ax
        in      al, dx
        mov     cx, 1000
        mov     dx, word [cdbase]
        add     dx, 7
        cld
   cdtrnwewait:
        mov     esi, 10
        call    delay_ms
        in      al, dx
        and     al, 128
        cmp     al, 0
        jz      cdtrl1
        loop    cdtrnwewait
   cdtrl1:
     ; read the result
        mov     ecx, [esp+0]
        mov     dx, word [cdbase]
   cdtrread:
        add     dx, 7
        in      al, dx
        and     al, 8
        cmp     al, 8
        jnz     cdtrdone
        sub     dx, 7
        in      ax, dx
        mov     [ecx], ax
        add     ecx, 2
        jmp     cdtrread
   cdtrdone:
        pop     ecx
        xor     eax, eax
        ret


sys_cdpause:

        call    sys_cd_atapi_command

        mov     dx, word [cdbase]
        mov     ax, 0x004B
        out     dx, ax
        mov     ax, 0
        out     dx, ax
        mov     ax, 0
        out     dx, ax
        mov     ax, 0
        out     dx, ax
        mov     ax, 0
        out     dx, ax
        mov     ax, 0
        out     dx, ax

        mov     esi, 10
        call    delay_ms
        add     dx, 7
        in      al, dx

        xor     eax, eax
        ret