sbpcd.c

LINUX1.0内核源代码,学习LINUX编程的一定要看。

  DS[d].diskstate_flags &= ~multisession_bit;
  DS[d].f_multisession=0;
  clr_cmdbuf();
  if (new_drive)
    {
      drvcmd[0]=0x8D;
      response_count=6;
      flags_cmd_out=f_putcmd|f_ResponseStatus|f_obey_p_check;
      i=cmd_out();
      if (i<0) return (i);
      if ((infobuf[0]&0x80)!=0)
	{
	  DPRINTF((DBG_MUL,"SBPCD: MultiSession CD detected: %02X %02X %02X %02X %02X %02X\n",
                         infobuf[0], infobuf[1], infobuf[2],
		         infobuf[3], infobuf[4], infobuf[5]));
	  DS[d].f_multisession=1;
	  DS[d].lba_multi=msf2blk(make32(make16(0,infobuf[1]),
                                   make16(infobuf[2],infobuf[3])));
	}
    }
  DS[d].diskstate_flags |= multisession_bit;
  return (0);
}
/*==========================================================================*/
static void check_datarate(void)
{
#ifdef CDMKE
  int i=0;

  timed_out=0;
  datarate=0;

  /* set a timer to make (timed_out!=0) after 1.1 seconds */

  DPRINTF((DBG_TIM,"SBPCD: timer started (110).\n"));
  sti(); /* to avoid possible "printf" bug */

  SET_TIMER(mark_timeout,110);
  do
    {
      i=inb(CDi_status);
      datarate++;

#if 00000
      if (datarate>0x0FFFFFFF) break;
#endif 00000

    }
  while (!timed_out); /* originally looping for 1.1 seconds */
  CLEAR_TIMER;
  DPRINTF((DBG_TIM,"SBPCD: datarate: %d\n", datarate));
  if (datarate<65536) datarate=65536;

  maxtim16=datarate*16;
  maxtim04=datarate*4;
  maxtim02=datarate*2;
  maxtim_8=datarate/32;
#if MANY_SESSION
  maxtim_data=datarate/100;
#else
  maxtim_data=datarate/300;
#endif MANY_SESSION
  DPRINTF((DBG_TIM,"SBPCD: maxtim_8 %d, maxtim_data %d.\n",
	   maxtim_8, maxtim_data));
#endif CDMKE
}
/*==========================================================================*/
static int check_version(void)
{
  int i, j;

  /* clear any pending error state */
  clr_cmdbuf();
  drvcmd[0]=0x82;
  response_count=9;
  flags_cmd_out=f_putcmd;
  cmd_out();

  /* read drive version */
  clr_cmdbuf();
  for (i=0;i<12;i++) infobuf[i]=0;
  drvcmd[0]=0x83;
  response_count=12;
  flags_cmd_out=f_putcmd;
  i=cmd_out();
  if (i<0) DPRINTF((DBG_INI,"SBPCD: cmd_83 returns %d\n",i));

  DPRINTF((DBG_INI,"SBPCD: infobuf = \""));
  for (i=0;i<12;i++) DPRINTF((DBG_INI,"%c",infobuf[i]));
  DPRINTF((DBG_INI,"\"\n"));

  for (i=0;i<4;i++) if (infobuf[i]!=drive_family[i]) break;
  if (i==4)
    {
      DS[d].drive_model[0]=infobuf[i++];
      DS[d].drive_model[1]=infobuf[i++];
      DS[d].drive_model[2]='-';
      DS[d].drive_model[3]='x';
      DS[d].drv_type=drv_new;
    }
  else
    {
      for (i=0;i<8;i++) if (infobuf[i]!=drive_vendor[i]) break;
      if (i!=8) return (-1);
      DS[d].drive_model[0]='2';
      DS[d].drive_model[1]='x';
      DS[d].drive_model[2]='-';
      DS[d].drive_model[3]='x';
      DS[d].drv_type=drv_old;
    }
  for (j=0;j<4;j++) DS[d].firmware_version[j]=infobuf[i+j];
  j = (DS[d].firmware_version[0] & 0x0F) * 100 +
      (DS[d].firmware_version[2] & 0x0F) *10 +
      (DS[d].firmware_version[3] & 0x0F);
  if (new_drive)
    {
      if (j<100) DS[d].drv_type=drv_099;
      else DS[d].drv_type=drv_100;
    }
  else if (j<200) DS[d].drv_type=drv_199;
  else if (j<201) DS[d].drv_type=drv_200;
  else if (j<210) DS[d].drv_type=drv_201;
  else if (j<211) DS[d].drv_type=drv_210;
  else if (j<300) DS[d].drv_type=drv_211;
  else DS[d].drv_type=drv_300;
  return (0);
}
/*==========================================================================*/
static int switch_drive(int num)
{
  int i;

  d=num;

  i=num;
  if (sbpro_type) i=(i&0x01)<<1|(i&0x02)>>1;
  OUT(CDo_enable,i);
  DPRINTF((DBG_DID,"SBPCD: switch_drive: drive %d activated.\n",DS[d].drv_minor));
  return (0);
}
/*==========================================================================*/
/*
 * probe for the presence of drives on the selected controller
 */
static int check_drives(void)
{
  int i, j;
  char *printk_header="";

  DPRINTF((DBG_INI,"SBPCD: check_drives entered.\n"));

  ndrives=0;
  for (j=0;j<NR_SBPCD;j++)
    {
      DS[j].drv_minor=j;
      switch_drive(j);
      DPRINTF((DBG_ID,"SBPCD: check_drives: drive %d activated.\n",j));
      i=check_version();
      DPRINTF((DBG_ID,"SBPCD: check_version returns %d.\n",i));
      if (i>=0)
	{
	  ndrives++;
	  DS[d].drv_options=drv_pattern[j];
	  if (!new_drive) DS[d].drv_options&=~(speed_auto|speed_300|speed_150);
	  printk("%sDrive %d: %s%.4s (%.4s)\n", printk_header,
		 DS[d].drv_minor,
                 drive_family,
                 DS[d].drive_model,
                 DS[d].firmware_version);
	  printk_header="       - ";
	}
      else DS[d].drv_minor=-1;
    }
  if (ndrives==0) return (-1);
  return (0);
}
/*==========================================================================*/
#if 000
static void timewait(void)
{
  int i;
  for (i=0; i<65500; i++);
}
#endif 000
/*==========================================================================*/
#if FUTURE
/*
 *  obtain if requested service disturbs current audio state
 */            
static int obey_audio_state(u_char audio_state, u_char func,u_char subfunc)
{
  switch (audio_state)                   /* audio status from controller  */
    {
    case aud_11: /* "audio play in progress" */
    case audx11:
      switch (func)                      /* DOS command code */
	{
	case cmd_07: /* input flush  */
	case cmd_0d: /* open device  */
	case cmd_0e: /* close device */
	case cmd_0c: /* ioctl output */
	  return (1);
	case cmd_03: /* ioctl input  */
	  switch (subfunc)
	    /* DOS ioctl input subfunction */
	    {
	    case cxi_00:
	    case cxi_06:
	    case cxi_09:
	      return (1);
	    default:
	      return (ERROR15);
	    }
	  return (1);
	default:
	  return (ERROR15);
	}
      return (1);
    case aud_12:                  /* "audio play paused"      */
    case audx12:
      return (1);
    default:
      return (2);
    }
}
#endif FUTURE
/*==========================================================================*/
/* allowed is only
 * ioctl_o, flush_input, open_device, close_device, 
 * tell_address, tell_volume, tell_capabiliti,
 * tell_framesize, tell_CD_changed, tell_audio_posi
 */
static int check_allowed1(u_char func1, u_char func2)
{
#if 000
  if (func1==ioctl_o) return (0);
  if (func1==read_long) return (-1);
  if (func1==read_long_prefetch) return (-1);
  if (func1==seek) return (-1);
  if (func1==audio_play) return (-1);
  if (func1==audio_pause) return (-1);
  if (func1==audio_resume) return (-1);
  if (func1!=ioctl_i) return (0);
  if (func2==tell_SubQ_run_tot) return (-1);
  if (func2==tell_cdsize) return (-1);
  if (func2==tell_TocDescrip) return (-1);
  if (func2==tell_TocEntry) return (-1);
  if (func2==tell_subQ_info) return (-1);
  if (new_drive) if (func2==tell_SubChanInfo) return (-1);
  if (func2==tell_UPC) return (-1);
#else
  return (0);
#endif 000
}
/*==========================================================================*/
static int check_allowed2(u_char func1, u_char func2)
{
#if 000
  if (func1==read_long) return (-1);
  if (func1==read_long_prefetch) return (-1);
  if (func1==seek) return (-1);
  if (func1==audio_play) return (-1);
  if (func1!=ioctl_o) return (0);
  if (new_drive)
    {
      if (func2==EjectDisk) return (-1);
      if (func2==CloseTray) return (-1);
    }
#else
  return (0);
#endif 000
}
/*==========================================================================*/
static int check_allowed3(u_char func1, u_char func2)
{
#if 000
  if (func1==ioctl_i)
    {
      if (func2==tell_address) return (0);
      if (func2==tell_capabiliti) return (0);
      if (func2==tell_CD_changed) return (0);
      if (!new_drive) if (func2==tell_SubChanInfo) return (0);
      return (-1);
    }
  if (func1==ioctl_o)
    {
      if (func2==DriveReset) return (0);
      if (!new_drive)
	{
	  if (func2==EjectDisk) return (0);
	  if (func2==LockDoor) return (0);
	  if (func2==CloseTray) return (0);
	}
      return (-1);
    }
  if (func1==flush_input) return (-1);
  if (func1==read_long) return (-1);
  if (func1==read_long_prefetch) return (-1);
  if (func1==seek) return (-1);
  if (func1==audio_play) return (-1);
  if (func1==audio_pause) return (-1);
  if (func1==audio_resume) return (-1);
#else
  return (0);
#endif 000
}
/*==========================================================================*/
static int seek_pos_audio_end(void)
{
  int i;

  i=msf2blk(DS[d].pos_audio_end)-1;
  if (i<0) return (-1);
  i=xx_Seek(i,0);
  return (i);
}
/*==========================================================================*/
static int ReadToC(void)
{
  int i, j;
  DS[d].diskstate_flags &= ~toc_bit;
  DS[d].ored_ctl_adr=0;
  for (j=DS[d].n_first_track;j<=DS[d].n_last_track;j++)
    {
      i=xx_ReadTocEntry(j);
      if (i<0) return (i);
      DS[d].TocBuffer[j].nixbyte=DS[d].TocEnt_nixbyte;
      DS[d].TocBuffer[j].ctl_adr=DS[d].TocEnt_ctl_adr;
      DS[d].TocBuffer[j].number=DS[d].TocEnt_number;
      DS[d].TocBuffer[j].format=DS[d].TocEnt_format;
      DS[d].TocBuffer[j].address=DS[d].TocEnt_address;
      DS[d].ored_ctl_adr |= DS[d].TocEnt_ctl_adr;
    }
/* fake entry for LeadOut Track */
  DS[d].TocBuffer[j].nixbyte=0;
  DS[d].TocBuffer[j].ctl_adr=0;
  DS[d].TocBuffer[j].number=0;
  DS[d].TocBuffer[j].format=0;
  DS[d].TocBuffer[j].address=DS[d].size_msf;

  DS[d].diskstate_flags |= toc_bit;
  return (0);
}
/*==========================================================================*/
static int DiskInfo(void)
{
  int i;

  i=SetSpeed();
  if (i<0)
    {
      DPRINTF((DBG_INF,"SBPCD: DiskInfo: first SetSpeed returns %d\n", i));
      i=SetSpeed();
      if (i<0)
	{
	  DPRINTF((DBG_INF,"SBPCD: DiskInfo: second SetSpeed returns %d\n", i));
	  return (i);
	}
    }
  i=xx_ModeSense();
  if (i<0)
    {
      DPRINTF((DBG_INF,"SBPCD: DiskInfo: first xx_ModeSense returns %d\n", i));
      i=xx_ModeSense();
      if (i<0)
	{
	  DPRINTF((DBG_INF,"SBPCD: DiskInfo: second xx_ModeSense returns %d\n", i));
	  return (i);
	}
      return (i);
    }
  i=xx_ReadCapacity();
  if (i<0)
    {
      DPRINTF((DBG_INF,"SBPCD: DiskInfo: first ReadCapacity returns %d\n", i));
      i=xx_ReadCapacity();
      if (i<0)
	{
	  DPRINTF((DBG_INF,"SBPCD: DiskInfo: second ReadCapacity returns %d\n", i));
	  return (i);
	}
      return (i);
    }
  i=xx_ReadTocDescr();
  if (i<0)
    {
      DPRINTF((DBG_INF,"SBPCD: DiskInfo: ReadTocDescr returns %d\n", i));
      return (i);
    }
  i=ReadToC();
  if (i<0)
    {
      DPRINTF((DBG_INF,"SBPCD: DiskInfo: ReadToC returns %d\n", i));
      return (i);
    }
  i=yy_CheckMultiSession();
  if (i<0)
    {
      DPRINTF((DBG_INF,"SBPCD: DiskInfo: yy_CheckMultiSession returns %d\n", i));
      return (i);
    }
  i=xx_ReadTocEntry(DS[d].n_first_track);
  if (i<0)
    {
      DPRINTF((DBG_INF,"SBPCD: DiskInfo: xx_ReadTocEntry(1) returns %d\n", i));
      return (i);
    }
  i=xx_ReadUPC();
  if (i<0)
    {
      DPRINTF((DBG_INF,"SBPCD: DiskInfo: xx_ReadUPC returns %d\n", i));
      return (i);
    }
  return (0);
}
/*==========================================================================*/
/*
 *  called always if driver gets entered
 *  returns 0 or ERROR2 or ERROR15
 */
static int prepare(u_char func, u_char subfunc)
{
  int i;

  if (!new_drive)
    {
      i=inb(CDi_status);
      if (i&s_attention) GetStatus();
    }
  else GetStatus();
  if (DS[d].CD_changed==0xFF)
    {
#if MANY_SESSION
#else
      DS[d].diskstate_flags=0;
#endif MANY_SESSION
      DS[d].audio_state=0;
      if (!st_diskok)
	{
	  i=check_allowed1(func,subfunc);
	  if (i<0) return (-2);
	}
      else 
	{
	  i=check_allowed3(func,subfunc);
	  if (i<0)
	    {
	      DS[d].CD_changed=1;
	      return (-15);
	    }
	}
    }
  else
    {
      if (!st_diskok)
	{
#if MANY_SESSION
#else
	  DS[d].diskstate_flags=0;
#endif MANY_SESSION
	  DS[d].audio_state=0;
	  i=check_allowed1(func,subfunc);
	  if (i<0) return (-2);
	}
      else
	{ 
	  if (st_busy)
	    {
	      if (DS[d].audio_state!=audio_pausing)
		{
		  i=check_allowed2(func,subfunc);
		  if (i<0) return (-2);
		}
	    }
	  else
	    {
	      if (DS[d].audio_state==audio_playing) seek_pos_audio_end();
	      DS[d].audio_state=0;
	    }
	  if (!frame_size_valid)
	    {
	      i=DiskInfo();
	      if (i<0)