aztcd.c

powerpc内核 mpc8241芯片 linux系统下cdrom驱动程序

          with my Aztech drive there is no audio status bit, so I use the copy
          protection bit of the first track. If this track is copy protected 
          (copy bit = 0), I assume, it's an audio  disk. Strange, but works ??? */
        if (!(Toc[DiskInfo.first].ctrl_addr & 0x40)) 
           DiskInfo.audio=1;
        else 
           DiskInfo.audio=0;

        /* XA detection */
	if (! DiskInfo.audio) 
	   { azt_Play.start.min   = 0;  /*XA detection only seems to work*/
             azt_Play.start.sec   = 2;  /*when we play a track*/
	     azt_Play.start.frame = 0;
	     azt_Play.end.min     = 0;
	     azt_Play.end.sec     = 0;
	     azt_Play.end.frame   = 1;
	     if (sendAztCmd(ACMD_PLAY_READ, &azt_Play)) return -1;
	     DTEN_LOW;
	     for (st=0;st<CD_FRAMESIZE;st++) inb(DATA_PORT);
           } 
        DiskInfo.xa = getAztStatus() & AST_MODE;
        if (DiskInfo.xa) 
           { printk("aztcd: XA support experimental - mail results to [e-mail]\n");
           }
        
        /*multisession detection
          support for multisession CDs is done automatically with Aztech drives,
          we don't have to take care about TOC redirection; if we want the isofs
          to take care about redirection, we have to set AZT_MULTISESSION to 1*/
        DiskInfo.multi=0;
#if AZT_MULTISESSION
  	if (DiskInfo.xa) 
  	   { aztGetMultiDiskInfo(); /*here Disk.Info.multi is set*/
  	   }
#endif
        if (DiskInfo.multi)
           { DiskInfo.lastSession.min  = Toc[DiskInfo.next].diskTime.min;
	     DiskInfo.lastSession.sec  = Toc[DiskInfo.next].diskTime.sec;
             DiskInfo.lastSession.frame= Toc[DiskInfo.next].diskTime.frame;
             printk("aztcd: Multisession support experimental\n");
           }
        else
           { DiskInfo.lastSession.min  = Toc[DiskInfo.first].diskTime.min;
	     DiskInfo.lastSession.sec  = Toc[DiskInfo.first].diskTime.sec;
             DiskInfo.lastSession.frame= Toc[DiskInfo.first].diskTime.frame;
           }

	aztTocUpToDate = 1;
#ifdef AZT_DEBUG
	printk("aztcd: exiting aztUpdateToc  Time:%li\n",jiffies);
#endif
	return 0;
}


/* Read the table of contents header, i.e. no. of tracks and start of first 
 * track
 */
static int aztGetDiskInfo()
{ int limit;
  unsigned char test;
  struct azt_Toc qInfo;

#ifdef AZT_DEBUG
  printk("aztcd: starting aztGetDiskInfo  Time:%li\n",jiffies);
#endif
  if (aztSendCmd(ACMD_SEEK_TO_LEADIN)) RETURNM("aztGetDiskInfo 1",-1);
  STEN_LOW_WAIT;
  test=0;
  for (limit=300;limit>0;limit--)
   {  if (aztGetQChannelInfo(&qInfo)<0) RETURNM("aztGetDiskInfo 2",-1);
      if (qInfo.pointIndex==0xA0)   /*Number of FirstTrack*/
	{ DiskInfo.first = qInfo.diskTime.min;
	  DiskInfo.first = azt_bcd2bin(DiskInfo.first);
	  test=test|0x01;
	}
      if (qInfo.pointIndex==0xA1)   /*Number of LastTrack*/
	{ DiskInfo.last  = qInfo.diskTime.min;
	  DiskInfo.last  = azt_bcd2bin(DiskInfo.last);
	  test=test|0x02;
	}
      if (qInfo.pointIndex==0xA2)   /*DiskLength*/
	{ DiskInfo.diskLength.min=qInfo.diskTime.min;
	  DiskInfo.diskLength.sec=qInfo.diskTime.sec;
	  DiskInfo.diskLength.frame=qInfo.diskTime.frame;
	  test=test|0x04;
	}
      if ((qInfo.pointIndex==DiskInfo.first)&&(test&0x01))   /*StartTime of First Track*/
	{ DiskInfo.firstTrack.min=qInfo.diskTime.min;
	  DiskInfo.firstTrack.sec=qInfo.diskTime.sec;
	  DiskInfo.firstTrack.frame=qInfo.diskTime.frame;
	  test=test|0x08;
	}
      if (test==0x0F) break;
   }
#ifdef AZT_DEBUG
  printk ("aztcd: exiting aztGetDiskInfo  Time:%li\n",jiffies);
  printk("Disk Info: first %d last %d length %02X:%02X.%02X dez  first %02X:%02X.%02X dez\n",
  	  DiskInfo.first,
	  DiskInfo.last,
	  DiskInfo.diskLength.min,
	  DiskInfo.diskLength.sec,
	  DiskInfo.diskLength.frame,
	  DiskInfo.firstTrack.min,
	  DiskInfo.firstTrack.sec,
	  DiskInfo.firstTrack.frame);
#endif
  if (test!=0x0F) return -1;
  return 0;
}

#if AZT_MULTISESSION
/*
 * Get Multisession Disk Info
 */
static int aztGetMultiDiskInfo(void)
{ int limit, k=5;
  unsigned char test;
  struct azt_Toc qInfo;

#ifdef AZT_DEBUG
  printk("aztcd: starting aztGetMultiDiskInfo\n");
#endif

  do { azt_Play.start.min   = Toc[DiskInfo.last+1].diskTime.min;
       azt_Play.start.sec   = Toc[DiskInfo.last+1].diskTime.sec;
       azt_Play.start.frame = Toc[DiskInfo.last+1].diskTime.frame;
       test=0;

       for (limit=30;limit>0;limit--)   /*Seek for LeadIn of next session*/
           { if (aztSeek(&azt_Play)) RETURNM("aztGetMultiDiskInfo 1",-1);
             if (aztGetQChannelInfo(&qInfo)<0) RETURNM("aztGetMultiDiskInfo 2",-1);
             if ((qInfo.track==0)&&(qInfo.pointIndex)) break;  /*LeadIn found*/
             if ((azt_Play.start.sec+=10) > 59)
                { azt_Play.start.sec=0;
                  azt_Play.start.min++;
                }
           }
       if (!limit) break;  /*Check, if a leadin track was found, if not we're
                             at the end of the disk*/
#ifdef AZT_DEBUG_MULTISESSION
       printk("leadin found track %d  pointIndex %x  limit %d\n",qInfo.track,qInfo.pointIndex,limit);
#endif
       for (limit=300;limit>0;limit--)
           { if (++azt_Play.start.frame>74)
                { azt_Play.start.frame=0;
                  if (azt_Play.start.sec > 59)
                     { azt_Play.start.sec=0;
                       azt_Play.start.min++;
                     }
                }     
             if (aztSeek(&azt_Play)) RETURNM("aztGetMultiDiskInfo 3",-1);
             if (aztGetQChannelInfo(&qInfo)<0) RETURNM("aztGetMultiDiskInfo 4",-1);
             if (qInfo.pointIndex==0xA0)   /*Number of NextTrack*/
	        { DiskInfo.next = qInfo.diskTime.min;
	          DiskInfo.next = azt_bcd2bin(DiskInfo.next);
	          test=test|0x01;
	        }
             if (qInfo.pointIndex==0xA1)   /*Number of LastTrack*/
	 	{ DiskInfo.last  = qInfo.diskTime.min;
	   	  DiskInfo.last  = azt_bcd2bin(DiskInfo.last);
	   	  test=test|0x02;
	 	}
      	     if (qInfo.pointIndex==0xA2)   /*DiskLength*/
	 	{ DiskInfo.diskLength.min  =qInfo.diskTime.min;
	   	  DiskInfo.diskLength.sec  =qInfo.diskTime.sec;
	   	  DiskInfo.diskLength.frame=qInfo.diskTime.frame;
	  	  test=test|0x04;
	 	}
      	     if ((qInfo.pointIndex==DiskInfo.next)&&(test&0x01))   /*StartTime of Next Track*/
		{ DiskInfo.nextSession.min=qInfo.diskTime.min;
	  	  DiskInfo.nextSession.sec=qInfo.diskTime.sec;
	  	  DiskInfo.nextSession.frame=qInfo.diskTime.frame;
	  	  test=test|0x08;
		}
      	     if (test==0x0F) break;
   	   }
#ifdef AZT_DEBUG_MULTISESSION
       printk ("MultiDisk Info: first %d next %d last %d length %02x:%02x.%02x dez  first %02x:%02x.%02x dez  next %02x:%02x.%02x dez\n",
     		DiskInfo.first,
		DiskInfo.next,
		DiskInfo.last,
		DiskInfo.diskLength.min,
		DiskInfo.diskLength.sec,
		DiskInfo.diskLength.frame,
		DiskInfo.firstTrack.min,
		DiskInfo.firstTrack.sec,
		DiskInfo.firstTrack.frame,
		DiskInfo.nextSession.min,
		DiskInfo.nextSession.sec,
		DiskInfo.nextSession.frame);
#endif
       if (test!=0x0F) 
           break;
       else 
           DiskInfo.multi=1;   /*found TOC of more than one session*/
       aztGetToc(1);
     } while(--k);

#ifdef AZT_DEBUG
  printk ("aztcd: exiting aztGetMultiDiskInfo  Time:%li\n",jiffies);
#endif
  return 0;
}
#endif

/*
 * Read the table of contents (TOC)
 */
static int aztGetToc(int multi)
{ int i, px;
  int limit;
  struct azt_Toc qInfo;

#ifdef AZT_DEBUG
  printk("aztcd: starting aztGetToc  Time:%li\n",jiffies);
#endif
  if (!multi)
     { for (i = 0; i < MAX_TRACKS; i++)
 	    Toc[i].pointIndex = 0;
       i = DiskInfo.last + 3;
     }
  else
     { for (i = DiskInfo.next; i < MAX_TRACKS; i++)
     	    Toc[i].pointIndex = 0; 
       i = DiskInfo.last + 4 - DiskInfo.next;
     }

/*Is there a good reason to stop motor before TOC read?
  if (aztSendCmd(ACMD_STOP)) RETURNM("aztGetToc 1",-1);
      STEN_LOW_WAIT;
*/

  if (!multi)
     { azt_mode = 0x05;
       if (aztSendCmd(ACMD_SEEK_TO_LEADIN)) RETURNM("aztGetToc 2",-1);
       STEN_LOW_WAIT;
     }
  for (limit = 300; limit > 0; limit--)
      { if (multi)
           { if (++azt_Play.start.sec > 59)
                { azt_Play.start.sec=0;
                  azt_Play.start.min++;
                }
             if (aztSeek(&azt_Play)) RETURNM("aztGetToc 3",-1);
           }
	if (aztGetQChannelInfo(&qInfo) < 0)
	    break;

	px = azt_bcd2bin(qInfo.pointIndex);

	if (px > 0 && px < MAX_TRACKS && qInfo.track == 0)
  	    if (Toc[px].pointIndex == 0)
	       { Toc[px] = qInfo;
		 i--;
	       }

	if (i <= 0)
	    break;
      }

  Toc[DiskInfo.last + 1].diskTime = DiskInfo.diskLength;
  Toc[DiskInfo.last].trackTime    = DiskInfo.diskLength;

#ifdef AZT_DEBUG_MULTISESSION 
  printk("aztcd: exiting aztGetToc\n");
  for (i = 1; i <= DiskInfo.last+1; i++)
       printk("i = %2d ctl-adr = %02X track %2d px %02X %02X:%02X.%02X dez  %02X:%02X.%02X dez\n",
               i, Toc[i].ctrl_addr, Toc[i].track, Toc[i].pointIndex,
               Toc[i].trackTime.min, Toc[i].trackTime.sec, Toc[i].trackTime.frame,
               Toc[i].diskTime.min, Toc[i].diskTime.sec, Toc[i].diskTime.frame);
  for (i = 100; i < 103; i++)
       printk("i = %2d ctl-adr = %02X track %2d px %02X %02X:%02X.%02X dez  %02X:%02X.%02X dez\n",
               i, Toc[i].ctrl_addr, Toc[i].track, Toc[i].pointIndex,
               Toc[i].trackTime.min, Toc[i].trackTime.sec, Toc[i].trackTime.frame,
               Toc[i].diskTime.min, Toc[i].diskTime.sec, Toc[i].diskTime.frame);
#endif

  return limit > 0 ? 0 : -1;
}


/*##########################################################################
  Kernel Interface Functions
  ##########################################################################
*/
#ifdef AZT_KERNEL_PRIOR_2_1
void aztcd_setup(char *str, int *ints)
#else
__initfunc(void aztcd_setup(char *str, int *ints))
#endif
{  if (ints[0] > 0)
      azt_port = ints[1];
   if (ints[0] > 1)
      azt_cont = ints[2];
}

/* 
 * Checking if the media has been changed
*/
static int check_aztcd_media_change(kdev_t full_dev)
{ if (aztDiskChanged)          /* disk changed */
     { aztDiskChanged=0;
       return 1;
     }
  else
       return 0;               /* no change */
}

/*
 * Kernel IO-controls
*/
static int aztcd_ioctl(struct inode *ip, struct file *fp, unsigned int cmd, unsigned long arg)
{       int i, st;
	struct azt_Toc qInfo;
	struct cdrom_ti ti;
	struct cdrom_tochdr tocHdr;
	struct cdrom_msf msf;
	struct cdrom_tocentry entry;
	struct azt_Toc *tocPtr;            
	struct cdrom_subchnl subchnl;
        struct cdrom_volctrl volctrl;

#ifdef AZT_DEBUG
	printk("aztcd: starting aztcd_ioctl - Command:%x   Time: %li\n",cmd, jiffies);
        printk("aztcd Status %x\n", getAztStatus());
#endif
	if (!ip) RETURNM("aztcd_ioctl 1",-EINVAL);
	if (getAztStatus()<0) RETURNM("aztcd_ioctl 2", -EIO);
	if ((!aztTocUpToDate)||(aztDiskChanged))
	{ if ((i=aztUpdateToc())<0) RETURNM("aztcd_ioctl 3", i); /* error reading TOC */
	}

	switch (cmd)
	{
	case CDROMSTART:     /* Spin up the drive. Don't know, what to do,
	                        at least close the tray */
#if AZT_PRIVATE_IOCTLS 
	        if (aztSendCmd(ACMD_CLOSE)) RETURNM("aztcd_ioctl 4",-1);
	        STEN_LOW_WAIT;
#endif
		break;
	case CDROMSTOP:      /* Spin down the drive */
		if (aztSendCmd(ACMD_STOP)) RETURNM("aztcd_ioctl 5",-1);
		STEN_LOW_WAIT;
		/* should we do anything if it fails? */
		aztAudioStatus = CDROM_AUDIO_NO_STATUS;
		break;
	case CDROMPAUSE:     /* Pause the drive */
                if (aztAudioStatus != CDROM_AUDIO_PLAY) return -EINVAL; 

		if (aztGetQChannelInfo(&qInfo) < 0)
		{ /* didn't get q channel info */
		  aztAudioStatus = CDROM_AUDIO_NO_STATUS;
		  RETURNM("aztcd_ioctl 7",0);
		}
		azt_Play.start = qInfo.diskTime;        /* remember restart point */

		if (aztSendCmd(ACMD_PAUSE)) RETURNM("aztcd_ioctl 8",-1);
		STEN_LOW_WAIT;
		aztAudioStatus = CDROM_AUDIO_PAUSED;
		break;
	case CDROMRESUME:    /* Play it again, Sam */
		if (aztAudioStatus != CDROM_AUDIO_PAUSED) return -EINVAL;
		/* restart the drive at the saved position. */
		i = aztPlay(&azt_Play);
		if (i < 0)
		{ aztAudioStatus = CDROM_AUDIO_ERROR;
		  return -EIO;
		}
		aztAudioStatus = CDROM_AUDIO_PLAY;
		break;
	case CDROMMULTISESSION: /*multisession support -- experimental*/
	        { struct cdrom_multisession ms;
#ifdef AZT_DEBUG
   		  printk("aztcd ioctl MULTISESSION\n");
#endif
		  st = verify_area(VERIFY_WRITE, (void*) arg, sizeof(struct cdrom_multisession));
		  if (st) return st;
		  memcpy_fromfs(&ms, (void*) arg, sizeof(struct cdrom_multisession));
		  if (ms.addr_format == CDROM_MSF) 
		     { ms.addr.msf.minute = azt_bcd2bin(DiskInfo.lastSession.min);
		       ms.addr.msf.second = azt_bcd2bin(DiskInfo.lastSession.sec);
		       ms.addr.msf.frame  = azt_bcd2bin(DiskInfo.lastSession.frame);
		     } 
		  else if (ms.addr_format == CDROM_LBA)
		       ms.addr.lba = azt_msf2hsg(&DiskInfo.lastSession);
		  else
		       return -EINVAL;
		  ms.xa_flag = DiskInfo.xa;
	  	  memcpy_tofs((void*) arg, &ms, sizeof(struct cdrom_multisession));
#ifdef AZT_DEBUG 
 		  if (ms.addr_format == CDROM_MSF) 
                      printk("aztcd multisession xa:%d, msf:%02x:%02x.%02x [%02x:%02x.%02x])\n",
			      ms.xa_flag, ms.addr.msf.minute, ms.addr.msf.second, 
			      ms.addr.msf.frame, DiskInfo.lastSession.min,
			      DiskInfo.lastSession.sec, DiskInfo.lastSession.frame);
		  else
		      printk("aztcd multisession %d, lba:0x%08x [%02x:%02x.%02x])\n",
			      ms.xa_flag, ms.addr.lba, DiskInfo.lastSession.min,