1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/src/gdrom/mmc.c	Sat Jul 05 11:57:36 2008 +0000
     1.3 @@ -0,0 +1,101 @@
     1.4 +/**
     1.5 + * $Id: mmc.c 662 2008-03-02 11:38:08Z nkeynes $
     1.6 + *
     1.7 + * MMC host-side support functions.
     1.8 + *
     1.9 + * Copyright (c) 2008 Nathan Keynes.
    1.10 + *
    1.11 + * This program is free software; you can redistribute it and/or modify
    1.12 + * it under the terms of the GNU General Public License as published by
    1.13 + * the Free Software Foundation; either version 2 of the License, or
    1.14 + * (at your option) any later version.
    1.15 + *
    1.16 + * This program is distributed in the hope that it will be useful,
    1.17 + * but WITHOUT ANY WARRANTY; without even the implied warranty of
    1.18 + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    1.19 + * GNU General Public License for more details.
    1.20 + */
    1.21 +
    1.22 +#include "gdrom/gddriver.h"
    1.23 +#include "gdrom/packet.h"
    1.24 +
    1.25 +#define MSFTOLBA( m,s,f ) (f + (s*CD_FRAMES_PER_SECOND) + (m*CD_FRAMES_PER_MINUTE))
    1.26 +
    1.27 +void mmc_make_read_cd_cmd( char *cmd, uint32_t real_sector, int mode )
    1.28 +{
    1.29 +    cmd[0] = 0xBE;
    1.30 +    cmd[1] = (mode & 0x0E) << 1;
    1.31 +    cmd[2] = (real_sector >> 24) & 0xFF;
    1.32 +    cmd[3] = (real_sector >> 16) & 0xFF;
    1.33 +    cmd[4] = (real_sector >> 8) & 0xFF;
    1.34 +    cmd[5] = real_sector & 0xFF;
    1.35 +    cmd[6] = 0;
    1.36 +    cmd[7] = 0;
    1.37 +    cmd[8] = 1;
    1.38 +
    1.39 +    if( READ_CD_RAW(mode) ) {
    1.40 +        cmd[9] = 0xF0;
    1.41 +    } else {
    1.42 +        if( READ_CD_HEADER(mode) ) {
    1.43 +            cmd[9] = 0xA0;
    1.44 +        }
    1.45 +        if( READ_CD_SUBHEAD(mode) ) {
    1.46 +            cmd[9] |= 0x40;
    1.47 +        }
    1.48 +        if( READ_CD_DATA(mode) ) {
    1.49 +            cmd[9] |= 0x10;
    1.50 +        }
    1.51 +    }
    1.52 +}
    1.53 +
    1.54 +void mmc_parse_toc2( gdrom_image_t disc, unsigned char *buf )
    1.55 +{
    1.56 +    int max_track = 0;
    1.57 +    int last_track = -1;
    1.58 +    int leadout = -1;
    1.59 +    int len = (buf[0] << 8) | buf[1];
    1.60 +    int session_type = -1;
    1.61 +    int i;
    1.62 +    for( i = 4; i<len; i+=11 ) {
    1.63 +        int session = buf[i];
    1.64 +        int adr = buf[i+1] >> 4;
    1.65 +        int point = buf[i+3];
    1.66 +        if( adr == 0x01 && point > 0 && point < 100 ) {
    1.67 +            /* Track info */
    1.68 +            int trackno = point-1;
    1.69 +            if( point > max_track ) {
    1.70 +                max_track = point;
    1.71 +            }
    1.72 +            disc->track[trackno].flags = (buf[i+1] & 0x0F) << 4;
    1.73 +            disc->track[trackno].session = session - 1;
    1.74 +            disc->track[trackno].lba = MSFTOLBA(buf[i+8],buf[i+9],buf[i+10]);
    1.75 +            if( disc->track[trackno].flags & TRACK_DATA ) {
    1.76 +                disc->track[trackno].mode = GDROM_MODE1;
    1.77 +            } else {
    1.78 +                disc->track[trackno].mode = GDROM_CDDA;
    1.79 +            }
    1.80 +            if( last_track != -1 ) {
    1.81 +                disc->track[last_track].sector_count = disc->track[trackno].lba -
    1.82 +                disc->track[last_track].lba;
    1.83 +            }
    1.84 +            last_track = trackno;
    1.85 +        } else switch( (adr << 8) | point ) {
    1.86 +        case 0x1A0: /* session info */
    1.87 +            if( buf[i+9] == 0x20 ) {
    1.88 +                session_type = IDE_DISC_CDROMXA;
    1.89 +            } else {
    1.90 +                session_type = IDE_DISC_CDROM;
    1.91 +            }
    1.92 +            disc->disc_type = session_type;
    1.93 +            break;
    1.94 +        case 0x1A2: /* leadout */
    1.95 +            leadout = MSFTOLBA(buf[i+8], buf[i+9], buf[i+10]);
    1.96 +            break;
    1.97 +        }
    1.98 +    }
    1.99 +    disc->track_count = max_track;
   1.100 +
   1.101 +    if( leadout != -1 && last_track != -1 ) {
   1.102 +        disc->track[last_track].sector_count = leadout - disc->track[last_track].lba;
   1.103 +    }
   1.104 +}
   1.105 \ No newline at end of file