Merge branch 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mfashe...

[linux-2.6] / drivers / cdrom / sbpcd.c

/*
 *  sbpcd.c   CD-ROM device driver for the whole family of traditional,
 *            non-ATAPI IDE-style Matsushita/Panasonic CR-5xx drives.
 *            Works with SoundBlaster compatible cards and with "no-sound"
 *            interface cards like Lasermate, Panasonic CI-101P, Teac, ...
 *            Also for the Longshine LCS-7260 drive.
 *            Also for the IBM "External ISA CD-Rom" drive.
 *            Also for the CreativeLabs CD200 drive.
 *            Also for the TEAC CD-55A drive.
 *            Also for the ECS-AT "Vertos 100" drive.
 *            Not for Sanyo drives (but for the H94A, sjcd is there...).
 *            Not for any other Funai drives than the CD200 types (sometimes
 *             labelled E2550UA or MK4015 or 2800F).
 */

#define VERSION "v4.63 Andrew J. Kroll <ag784@freenet.buffalo.edu> Wed Jul 26 04:24:10 EDT 2000"

/*   Copyright (C) 1993, 1994, 1995  Eberhard Moenkeberg <emoenke@gwdg.de>
 *
 *   This program is free software; you can redistribute it and/or modify
 *   it under the terms of the GNU General Public License as published by
 *   the Free Software Foundation; either version 2, or (at your option)
 *   any later version.
 *
 *   You should have received a copy of the GNU General Public License
 *   (for example /usr/src/linux/COPYING); if not, write to the Free
 *   Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 *
 *   If you change this software, you should mail a .diff file with some
 *   description lines to emoenke@gwdg.de. I want to know about it.
 *
 *   If you are the editor of a Linux CD, you should enable sbpcd.c within
 *   your boot floppy kernel and send me one of your CDs for free.
 *
 *   If you would like to port the driver to an other operating system (f.e.
 *   FreeBSD or NetBSD) or use it as an information source, you shall not be
 *   restricted by the GPL under the following conditions:
 *     a) the source code of your work is freely available
 *     b) my part of the work gets mentioned at all places where your 
 *        authorship gets mentioned
 *     c) I receive a copy of your code together with a full installation
 *        package of your operating system for free.
 *
 *
 *  VERSION HISTORY
 *
 *  0.1  initial release, April/May 93, after mcd.c (Martin Harriss)
 *
 *  0.2  thek "repeat:"-loop in do_sbpcd_request did not check for
 *       end-of-request_queue (resulting in kernel panic).
 *       Flow control seems stable, but throughput is not better.  
 *
 *  0.3  interrupt locking totally eliminated (maybe "inb" and "outb"
 *       are still locking) - 0.2 made keyboard-type-ahead losses.
 *       check_sbpcd_media_change added (to use by isofs/inode.c)
 *       - but it detects almost nothing.
 *
 *  0.4  use MAJOR 25 definitely.
 *       Almost total re-design to support double-speed drives and
 *       "naked" (no sound) interface cards ("LaserMate" interface type).
 *       Flow control should be exact now.
 *       Don't occupy the SbPro IRQ line (not needed either); will
 *       live together with Hannu Savolainen's sndkit now.
 *       Speeded up data transfer to 150 kB/sec, with help from Kai
 *       Makisara, the "provider" of the "mt" tape utility.
 *       Give "SpinUp" command if necessary.
 *       First steps to support up to 4 drives (but currently only one).
 *       Implemented audio capabilities - workman should work, xcdplayer
 *       gives some problems.
 *       This version is still consuming too much CPU time, and
 *       sleeping still has to be worked on.
 *       During "long" implied seeks, it seems possible that a 
 *       ReadStatus command gets ignored. That gives the message
 *       "ResponseStatus timed out" (happens about 6 times here during
 *       a "ls -alR" of the YGGDRASIL LGX-Beta CD). Such a case is
 *       handled without data error, but it should get done better.
 *
 *  0.5  Free CPU during waits (again with help from Kai Makisara).
 *       Made it work together with the LILO/kernel setup standard.
 *       Included auto-probing code, as suggested by YGGDRASIL.
 *       Formal redesign to add DDI debugging.
 *       There are still flaws in IOCTL (workman with double speed drive).
 *
 *  1.0  Added support for all drive IDs (0...3, no longer only 0)
 *       and up to 4 drives on one controller.
 *       Added "#define MANY_SESSION" for "old" multi session CDs.
 *
 *  1.1  Do SpinUp for new drives, too.
 *       Revised for clean compile under "old" kernels (0.99pl9).
 *
 *  1.2  Found the "workman with double-speed drive" bug: use the driver's
 *       audio_state, not what the drive is reporting with ReadSubQ.
 *
 *  1.3  Minor cleanups.
 *       Refinements regarding Workman.
 *
 *  1.4  Read XA disks (PhotoCDs) with "old" drives, too (but only the first
 *       session - no chance to fully access a "multi-session" CD).
 *       This currently still is too slow (50 kB/sec) - but possibly
 *       the old drives won't do it faster.
 *       Implemented "door (un)lock" for new drives (still does not work
 *       as wanted - no lock possible after an unlock).
 *       Added some debugging printout for the UPC/EAN code - but my drives 
 *       return only zeroes. Is there no UPC/EAN code written?
 *
 *  1.5  Laborate with UPC/EAN code (not better yet).
 *       Adapt to kernel 1.1.8 change (have to explicitly include
 *       <linux/string.h> now).
 *
 *  1.6  Trying to read audio frames as data. Impossible with the current
 *       drive firmware levels, as it seems. Awaiting any hint. ;-)
 *       Changed "door unlock": repeat it until success.
 *       Changed CDROMSTOP routine (stop somewhat "softer" so that Workman
 *       won't get confused).
 *       Added a third interface type: Sequoia S-1000, as used with the SPEA
 *       Media FX sound card. This interface (usable for Sony and Mitsumi 
 *       drives, too) needs a special configuration setup and behaves like a 
 *       LaserMate type after that. Still experimental - I do not have such
 *       an interface.
 *       Use the "variable BLOCK_SIZE" feature (2048). But it does only work
 *       if you give the mount option "block=2048".
 *       The media_check routine is currently disabled; now that it gets
 *       called as it should I fear it must get synchronized for not to
 *       disturb the normal driver's activity.
 *
 *  2.0  Version number bumped - two reasons:
 *       - reading audio tracks as data works now with CR-562 and CR-563. We
 *       currently do it by an IOCTL (yet has to get standardized), one frame
 *       at a time; that is pretty slow. But it works.
 *       - we are maintaining now up to 4 interfaces (each up to 4 drives):
 *       did it the easy way - a different MAJOR (25, 26, ...) and a different
 *       copy of the driver (sbpcd.c, sbpcd2.c, sbpcd3.c, sbpcd4.c - only
 *       distinguished by the value of SBPCD_ISSUE and the driver's name),
 *       and a common sbpcd.h file.
 *       Bettered the "ReadCapacity error" problem with old CR-52x drives (the
 *       drives sometimes need a manual "eject/insert" before work): just
 *       reset the drive and do again. Needs lots of resets here and sometimes
 *       that does not cure, so this can't be the solution.
 *
 *  2.1  Found bug with multisession CDs (accessing frame 16).
 *       "read audio" works now with address type CDROM_MSF, too.
 *       Bigger audio frame buffer: allows reading max. 4 frames at time; this
 *       gives a significant speedup, but reading more than one frame at once
 *       gives missing chunks at each single frame boundary.
 *
 *  2.2  Kernel interface cleanups: timers, init, setup, media check.
 *
 *  2.3  Let "door lock" and "eject" live together.
 *       Implemented "close tray" (done automatically during open).
 *
 *  2.4  Use different names for device registering.
 *
 *  2.5  Added "#if EJECT" code (default: enabled) to automatically eject
 *       the tray during last call to "sbpcd_release".
 *       Added "#if JUKEBOX" code (default: disabled) to automatically eject
 *       the tray during call to "sbpcd_open" if no disk is in.
 *       Turn on the CD volume of "compatible" sound cards, too; just define
 *       SOUND_BASE (in sbpcd.h) accordingly (default: disabled).
 *
 *  2.6  Nothing new.  
 *
 *  2.7  Added CDROMEJECT_SW ioctl to set the "EJECT" behavior on the fly:
 *       0 disables, 1 enables auto-ejecting. Useful to keep the tray in
 *       during shutdown.
 *
 *  2.8  Added first support (still BETA, I need feedback or a drive) for
 *       the Longshine LCS-7260 drives. They appear as double-speed drives
 *       using the "old" command scheme, extended by tray control and door
 *       lock functions.
 *       Found (and fixed preliminary) a flaw with some multisession CDs: we
 *       have to re-direct not only the accesses to frame 16 (the isofs
 *       routines drive it up to max. 100), but also those to the continuation
 *       (repetition) frames (as far as they exist - currently set fix as
 *       16..20).
 *       Changed default of the "JUKEBOX" define. If you use this default,
 *       your tray will eject if you try to mount without a disk in. Next
 *       mount command will insert the tray - so, just fill in a disk. ;-)
 *
 *  2.9  Fulfilled the Longshine LCS-7260 support; with great help and
 *       experiments by Serge Robyns.
 *       First attempts to support the TEAC CD-55A drives; but still not
 *       usable yet.
 *       Implemented the CDROMMULTISESSION ioctl; this is an attempt to handle
 *       multi session CDs more "transparent" (redirection handling has to be
 *       done within the isofs routines, and only for the special purpose of
 *       obtaining the "right" volume descriptor; accesses to the raw device
 *       should not get redirected).
 *
 *  3.0  Just a "normal" increment, with some provisions to do it better. ;-)
 *       Introduced "#define READ_AUDIO" to specify the maximum number of 
 *       audio frames to grab with one request. This defines a buffer size
 *       within kernel space; a value of 0 will reserve no such space and
 *       disable the CDROMREADAUDIO ioctl. A value of 75 enables the reading
 *       of a whole second with one command, but will use a buffer of more
 *       than 172 kB.
 *       Started CD200 support. Drive detection should work, but nothing
 *       more.
 *
 *  3.1  Working to support the CD200 and the Teac CD-55A drives.
 *       AT-BUS style device numbering no longer used: use SCSI style now.
 *       So, the first "found" device has MINOR 0, regardless of the
 *       jumpered drive ID. This implies modifications to the /dev/sbpcd*
 *       entries for some people, but will help the DAU (german TLA, english:
 *       "newbie", maybe ;-) to install his "first" system from a CD.
 *
 *  3.2  Still testing with CD200 and CD-55A drives.
 *
 *  3.3  Working with CD200 support.
 *
 *  3.4  Auto-probing stops if an address of 0 is seen (to be entered with
 *       the kernel command line).
 *       Made the driver "loadable". If used as a module, "audio copy" is
 *       disabled, and the internal read ahead data buffer has a reduced size
 *       of 4 kB; so, throughput may be reduced a little bit with slow CPUs.
 *
 *  3.5  Provisions to handle weird photoCDs which have an interrupted
 *       "formatting" immediately after the last frames of some files: simply
 *       never "read ahead" with MultiSession CDs. By this, CPU usage may be
 *       increased with those CDs, and there may be a loss in speed.
 *       Re-structured the messaging system.
 *       The "loadable" version no longer has a limited READ_AUDIO buffer
 *       size.
 *       Removed "MANY_SESSION" handling for "old" multi session CDs.
 *       Added "private" IOCTLs CDROMRESET and CDROMVOLREAD.
 *       Started again to support the TEAC CD-55A drives, now that I found
 *       the money for "my own" drive. ;-)
 *       The TEAC CD-55A support is fairly working now.
 *       I have measured that the drive "delivers" at 600 kB/sec (even with
 *       bigger requests than the drive's 64 kB buffer can satisfy), but
 *       the "real" rate does not exceed 520 kB/sec at the moment. 
 *       Caused by the various changes to build in TEAC support, the timed
 *       loops are de-optimized at the moment (less throughput with CR-52x
 *       drives, and the TEAC will give speed only with SBP_BUFFER_FRAMES 64).
 *
 *  3.6  Fixed TEAC data read problems with SbPro interfaces.
 *       Initial size of the READ_AUDIO buffer is 0. Can get set to any size
 *       during runtime.
 *
 *  3.7  Introduced MAX_DRIVES for some poor interface cards (seen with TEAC
 *       drives) which allow only one drive (ID 0); this avoids repetitive
 *       detection under IDs 1..3. 
 *       Elongated cmd_out_T response waiting; necessary for photo CDs with
 *       a lot of sessions.
 *       Bettered the sbpcd_open() behavior with TEAC drives.
 *
 *  3.8  Elongated max_latency for CR-56x drives.
 *
 *  3.9  Finally fixed the long-known SoundScape/SPEA/Sequoia S-1000 interface
 *       configuration bug.
 *       Now Corey, Heiko, Ken, Leo, Vadim/Eric & Werner are invited to copy
 *       the config_spea() routine into their drivers. ;-)
 *
 *  4.0  No "big step" - normal version increment.
 *       Adapted the benefits from 1.3.33.
 *       Fiddled with CDROMREADAUDIO flaws.
 *       Avoid ReadCapacity command with CD200 drives (the MKE 1.01 version
 *       seems not to support it).
 *       Fulfilled "read audio" for CD200 drives, with help of Pete Heist
 *       (heistp@rpi.edu).
 *
 *  4.1  Use loglevel KERN_INFO with printk().
 *       Added support for "Vertos 100" drive ("ECS-AT") - it is very similar
 *       to the Longshine LCS-7260. Give feedback if you can - I never saw
 *       such a drive, and I have no specs.
 *
 *  4.2  Support for Teac 16-bit interface cards. Can't get auto-detected,
 *       so you have to jumper your card to 0x2C0. Still not 100% - come
 *       in contact if you can give qualified feedback.
 *       Use loglevel KERN_NOTICE with printk(). If you get annoyed by a
 *       flood of unwanted messages and the accompanied delay, try to read
 *       my documentation. Especially the Linux CDROM drivers have to do an
 *       important job for the newcomers, so the "distributed" version has
 *       to fit some special needs. Since generations, the flood of messages
 *       is user-configurable (even at runtime), but to get aware of this, one
 *       needs a special mental quality: the ability to read.
 *       
 *  4.3  CD200F does not like to receive a command while the drive is
 *       reading the ToC; still trying to solve it.
 *       Removed some redundant verify_area calls (yes, Heiko Eissfeldt
 *       is visiting all the Linux CDROM drivers ;-).
 *       
 *  4.4  Adapted one idea from tiensivu@pilot.msu.edu's "stripping-down"
 *       experiments: "KLOGD_PAUSE".
 *       Inhibited "play audio" attempts with data CDs. Provisions for a
 *       "data-safe" handling of "mixed" (data plus audio) Cds.
 *
 *  4.5  Meanwhile Gonzalo Tornaria <tornaria@cmat.edu.uy> (GTL) built a
 *       special end_request routine: we seem to have to take care for not
 *       to have two processes working at the request list. My understanding
 *       was and is that ll_rw_blk should not call do_sbpcd_request as long
 *       as there is still one call active (the first call will care for all
 *       outstanding I/Os, and if a second call happens, that is a bug in
 *       ll_rw_blk.c).
 *       "Check media change" without touching any drive.
 *
 *  4.6  Use a semaphore to synchronize multi-activity; elaborated by Rob
 *       Riggs <rriggs@tesser.com>. At the moment, we simply block "read"
 *       against "ioctl" and vice versa. This could be refined further, but
 *       I guess with almost no performance increase.
 *       Experiments to speed up the CD-55A; again with help of Rob Riggs
 *       (to be true, he gave both, idea & code. ;-)
 *
 *  4.61 Ported to Uniform CD-ROM driver by 
 *       Heiko Eissfeldt <heiko@colossus.escape.de> with additional
 *       changes by Erik Andersen <andersee@debian.org>
 *
 *  4.62 Fix a bug where playing audio left the drive in an unusable state.
 *         Heiko Eissfeldt <heiko@colossus.escape.de>
 *
 *  November 1999 -- Make kernel-parameter implementation work with 2.3.x 
 *                   Removed init_module & cleanup_module in favor of 
 *                   module_init & module_exit.
 *                   Torben Mathiasen <tmm@image.dk>
 *
 *  4.63 Bug fixes for audio annoyances, new legacy CDROM maintainer.
 *              Annoying things fixed:
 *              TOC reread on automated disk changes
 *              TOC reread on manual cd changes
 *              Play IOCTL tries to play CD before it's actually ready... sometimes.
 *              CD_AUDIO_COMPLETED state so workman (and other playes) can repeat play.
 *              Andrew J. Kroll <ag784@freenet.buffalo.edu> Wed Jul 26 04:24:10 EDT 2000
 *
 *  4.64 Fix module parameters - were being completely ignored.
 *       Can also specify max_drives=N as a setup int to get rid of
 *       "ghost" drives on crap hardware (aren't they all?)   Paul Gortmaker
 *
 *  TODO
 *     implement "read all subchannel data" (96 bytes per frame)
 *     remove alot of the virtual status bits and deal with hardware status
 *     move the change of cd for audio to a better place
 *     add debug levels to insmod parameters (trivial)
 *
 *     special thanks to Kai Makisara (kai.makisara@vtt.fi) for his fine
 *     elaborated speed-up experiments (and the fabulous results!), for
 *     the "push" towards load-free wait loops, and for the extensive mail
 *     thread which brought additional hints and bug fixes.
 *
 */

/*
 * Trying to merge requests breaks this driver horribly (as in it goes
 * boom and apparently has done so since 2.3.41).  As it is a legacy
 * driver for a horribly slow double speed CD on a hideous interface
 * designed for polled operation, I won't lose any sleep in simply
 * disallowing merging.                         Paul G.  02/2001
 *
 * Thu May 30 14:14:47 CEST 2002:
 *
 * I have presumably found the reson for the above - there was a bogous
 * end_request substitute, which was manipulating the request queues
 * incorrectly. If someone has access to the actual hardware, and it's
 * still operations - well  please free to test it.
 *
 * Marcin Dalecki
 */

/*
 * Add bio/kdev_t changes for 2.5.x required to make it work again. 
 * Still room for improvement in the request handling here if anyone
 * actually cares.  Bring your own chainsaw.    Paul G.  02/2002
 */


#include <linux/module.h>

#include <linux/errno.h>
#include <linux/sched.h>
#include <linux/mm.h>
#include <linux/timer.h>
#include <linux/fs.h>
#include <linux/kernel.h>
#include <linux/cdrom.h>
#include <linux/ioport.h>
#include <linux/devfs_fs_kernel.h>
#include <linux/major.h>
#include <linux/string.h>
#include <linux/vmalloc.h>
#include <linux/init.h>
#include <linux/interrupt.h>

#include <asm/system.h>
#include <asm/io.h>
#include <asm/uaccess.h>
#include <stdarg.h>
#include <linux/config.h>
#include "sbpcd.h"

#define MAJOR_NR MATSUSHITA_CDROM_MAJOR
#include <linux/blkdev.h>

/*==========================================================================*/
#if SBPCD_DIS_IRQ
# define SBPCD_CLI cli()
# define SBPCD_STI sti()
#else
# define SBPCD_CLI
# define SBPCD_STI
#endif

/*==========================================================================*/
/*
 * auto-probing address list
 * inspired by Adam J. Richter from Yggdrasil
 *
 * still not good enough - can cause a hang.
 *   example: a NE 2000 ethernet card at 300 will cause a hang probing 310.
 * if that happens, reboot and use the LILO (kernel) command line.
 * The possibly conflicting ethernet card addresses get NOT probed 
 * by default - to minimize the hang possibilities. 
 *
 * The SB Pro addresses get "mirrored" at 0x6xx and some more locations - to
 * avoid a type error, the 0x2xx-addresses must get checked before 0x6xx.
 *
 * send mail to emoenke@gwdg.de if your interface card is not FULLY
 * represented here.
 */
static int sbpcd[] =
{
        CDROM_PORT, SBPRO, /* probe with user's setup first */
#if DISTRIBUTION
        0x230, 1, /* Soundblaster Pro and 16 (default) */
#if 0
        0x300, 0, /* CI-101P (default), WDH-7001C (default),
                     Galaxy (default), Reveal (one default) */
        0x250, 1, /* OmniCD default, Soundblaster Pro and 16 */
        0x2C0, 3, /* Teac 16-bit cards */
        0x260, 1, /* OmniCD */
        0x320, 0, /* Lasermate, CI-101P, WDH-7001C, Galaxy, Reveal (other default),
                     Longshine LCS-6853 (default) */
        0x338, 0, /* Reveal Sound Wave 32 card model #SC600 */
        0x340, 0, /* Mozart sound card (default), Lasermate, CI-101P */
        0x360, 0, /* Lasermate, CI-101P */
        0x270, 1, /* Soundblaster 16 */
        0x670, 0, /* "sound card #9" */
        0x690, 0, /* "sound card #9" */
        0x338, 2, /* SPEA Media FX, Ensonic SoundScape (default) */
        0x328, 2, /* SPEA Media FX */
        0x348, 2, /* SPEA Media FX */
        0x634, 0, /* some newer sound cards */
        0x638, 0, /* some newer sound cards */
        0x230, 1, /* some newer sound cards */
        /* due to incomplete address decoding of the SbPro card, these must be last */
        0x630, 0, /* "sound card #9" (default) */
        0x650, 0, /* "sound card #9" */
#ifdef MODULE
        /*
         * some "hazardous" locations (no harm with the loadable version)
         * (will stop the bus if a NE2000 ethernet card resides at offset -0x10)
         */
        0x330, 0, /* Lasermate, CI-101P, WDH-7001C */
        0x350, 0, /* Lasermate, CI-101P */
        0x358, 2, /* SPEA Media FX */
        0x370, 0, /* Lasermate, CI-101P */
        0x290, 1, /* Soundblaster 16 */
        0x310, 0, /* Lasermate, CI-101P, WDH-7001C */
#endif /* MODULE */
#endif
#endif /* DISTRIBUTION */
};

/*
 * Protects access to global structures etc.
 */
static  __cacheline_aligned DEFINE_SPINLOCK(sbpcd_lock);
static struct request_queue *sbpcd_queue;

/* You can only set the first pair, from old MODULE_PARM code.  */
static int sbpcd_set(const char *val, struct kernel_param *kp)
{
        get_options((char *)val, 2, (int *)sbpcd);
        return 0;
}
module_param_call(sbpcd, sbpcd_set, NULL, NULL, 0);

#define NUM_PROBE  (sizeof(sbpcd) / sizeof(int))

/*==========================================================================*/

#define INLINE inline

/*==========================================================================*/
/*
 * the forward references:
 */
static void sbp_sleep(u_int);
static void mark_timeout_delay(u_long);
static void mark_timeout_data(u_long);
#if 0
static void mark_timeout_audio(u_long);
#endif
static void sbp_read_cmd(struct request *req);
static int sbp_data(struct request *req);
static int cmd_out(void);
static int DiskInfo(void);

/*==========================================================================*/

/*
 * pattern for printk selection:
 *
 * (1<<DBG_INF)  necessary information
 * (1<<DBG_BSZ)  BLOCK_SIZE trace
 * (1<<DBG_REA)  "read" status trace
 * (1<<DBG_CHK)  "media check" trace
 * (1<<DBG_TIM)  datarate timer test
 * (1<<DBG_INI)  initialization trace
 * (1<<DBG_TOC)  tell TocEntry values
 * (1<<DBG_IOC)  ioctl trace
 * (1<<DBG_STA)  "ResponseStatus" trace
 * (1<<DBG_ERR)  "cc_ReadError" trace
 * (1<<DBG_CMD)  "cmd_out" trace
 * (1<<DBG_WRN)  give explanation before auto-probing
 * (1<<DBG_MUL)  multi session code test
 * (1<<DBG_IDX)  "drive_id != 0" test code
 * (1<<DBG_IOX)  some special information
 * (1<<DBG_DID)  drive ID test
 * (1<<DBG_RES)  drive reset info
 * (1<<DBG_SPI)  SpinUp test info
 * (1<<DBG_IOS)  ioctl trace: "subchannel"
 * (1<<DBG_IO2)  ioctl trace: general
 * (1<<DBG_UPC)  show UPC info
 * (1<<DBG_XA1)  XA mode debugging
 * (1<<DBG_LCK)  door (un)lock info
 * (1<<DBG_SQ1)   dump SubQ frame
 * (1<<DBG_AUD)  "read audio" debugging
 * (1<<DBG_SEQ)  Sequoia interface configuration trace
 * (1<<DBG_LCS)  Longshine LCS-7260 debugging trace
 * (1<<DBG_CD2)  MKE/Funai CD200 debugging trace
 * (1<<DBG_TEA)  TEAC CD-55A debugging trace
 * (1<<DBG_ECS)  ECS-AT (Vertos-100) debugging trace
 * (1<<DBG_000)  unnecessary information
 */
#if DISTRIBUTION
static int sbpcd_debug = (1<<DBG_INF);
#else
static int sbpcd_debug = 0 & ((1<<DBG_INF) |
                          (1<<DBG_TOC) |
                          (1<<DBG_MUL) |
                          (1<<DBG_UPC));
#endif /* DISTRIBUTION */

static int sbpcd_ioaddr = CDROM_PORT;   /* default I/O base address */
static int sbpro_type = SBPRO;
static unsigned char f_16bit;
static unsigned char do_16bit;
static int CDo_command, CDo_reset;
static int CDo_sel_i_d, CDo_enable;
static int CDi_info, CDi_status, CDi_data;
static struct cdrom_msf msf;
static struct cdrom_ti ti;
static struct cdrom_tochdr tochdr;
static struct cdrom_tocentry tocentry;
static struct cdrom_subchnl SC;
static struct cdrom_volctrl volctrl;
static struct cdrom_read_audio read_audio;

static unsigned char msgnum;
static char msgbuf[80];

static int max_drives = MAX_DRIVES;
module_param(max_drives, int, 0);
#ifndef MODULE
static unsigned char setup_done;
static const char *str_sb_l = "soundblaster";
static const char *str_sp_l = "spea";
static const char *str_ss_l = "soundscape";
static const char *str_t16_l = "teac16bit";
static const char *str_ss = "SoundScape";
#endif
static const char *str_sb = "SoundBlaster";
static const char *str_lm = "LaserMate";
static const char *str_sp = "SPEA";
static const char *str_t16 = "Teac16bit";
static const char *type;
static const char *major_name="sbpcd";

/*==========================================================================*/

#ifdef FUTURE
static DECLARE_WAIT_QUEUE_HEAD(sbp_waitq);
#endif /* FUTURE */

static int teac=SBP_TEAC_SPEED;
static int buffers=SBP_BUFFER_FRAMES;

static u_char family0[]="MATSHITA"; /* MKE CR-521, CR-522, CR-523 */
static u_char family1[]="CR-56";    /* MKE CR-562, CR-563 */
static u_char family2[]="CD200";    /* MKE CD200, Funai CD200F */
static u_char familyL[]="LCS-7260"; /* Longshine LCS-7260 */
static u_char familyT[]="CD-55";    /* TEAC CD-55A */
static u_char familyV[]="ECS-AT";   /* ECS Vertos 100 */

static u_int recursion; /* internal testing only */
static u_int fatal_err; /* internal testing only */
static u_int response_count;
static u_int flags_cmd_out;
static u_char cmd_type;
static u_char drvcmd[10];
static u_char infobuf[20];
static u_char xa_head_buf[CD_XA_HEAD];
static u_char xa_tail_buf[CD_XA_TAIL];

#if OLD_BUSY
static volatile u_char busy_data;
static volatile u_char busy_audio; /* true semaphores would be safer */
#endif /* OLD_BUSY */ 
static DECLARE_MUTEX(ioctl_read_sem);
static u_long timeout;
static volatile u_char timed_out_delay;
static volatile u_char timed_out_data;
#if 0
static volatile u_char timed_out_audio;
#endif
static u_int datarate= 1000000;
static u_int maxtim16=16000000;
static u_int maxtim04= 4000000;
static u_int maxtim02= 2000000;
static u_int maxtim_8=   30000;
#if LONG_TIMING
static u_int maxtim_data= 9000;
#else
static u_int maxtim_data= 3000;
#endif /* LONG_TIMING */ 
#if DISTRIBUTION
static int n_retries=6;
#else
static int n_retries=6;
#endif
/*==========================================================================*/

static int ndrives;
static u_char drv_pattern[NR_SBPCD]={speed_auto,speed_auto,speed_auto,speed_auto};

/*==========================================================================*/
/*
 * drive space begins here (needed separate for each unit) 
 */
static struct sbpcd_drive {
        char drv_id;           /* "jumpered" drive ID or -1 */
        char drv_sel;          /* drive select lines bits */
        
        char drive_model[9];
        u_char firmware_version[4];
        char f_eject;          /* auto-eject flag: 0 or 1 */
        u_char *sbp_buf;       /* Pointer to internal data buffer,
                                  space allocated during sbpcd_init() */
        u_int sbp_bufsiz;      /* size of sbp_buf (# of frames) */
        int sbp_first_frame;   /* First frame in buffer */
        int sbp_last_frame;    /* Last frame in buffer  */
        int sbp_read_frames;   /* Number of frames being read to buffer */
        int sbp_current;       /* Frame being currently read */
        
        u_char mode;           /* read_mode: READ_M1, READ_M2, READ_SC, READ_AU */
        u_char *aud_buf;       /* Pointer to audio data buffer,
                                  space allocated during sbpcd_init() */
        u_int sbp_audsiz;      /* size of aud_buf (# of raw frames) */
        u_int drv_type;
        u_char drv_options;
        int status_bits;
        u_char diskstate_flags;
        u_char sense_byte;
        
        u_char CD_changed;
        char open_count;
        u_char error_byte;
        
        u_char f_multisession;
        u_int lba_multi;
        int first_session;
        int last_session;
        int track_of_last_session;
        
        u_char audio_state;
        u_int pos_audio_start;
        u_int pos_audio_end;
        char vol_chan0;
        u_char vol_ctrl0;
        char vol_chan1;
        u_char vol_ctrl1;
#if 000 /* no supported drive has it */
        char vol_chan2;
        u_char vol_ctrl2;
        char vol_chan3;
        u_char vol_ctrl3;
#endif /*000 */
        u_char volume_control; /* TEAC on/off bits */
        
        u_char SubQ_ctl_adr;
        u_char SubQ_trk;
        u_char SubQ_pnt_idx;
        u_int SubQ_run_tot;
        u_int SubQ_run_trk;
        u_char SubQ_whatisthis;
        
        u_char UPC_ctl_adr;
        u_char UPC_buf[7];
        
        int frame_size;
        int CDsize_frm;
        
        u_char xa_byte; /* 0x20: XA capabilities */
        u_char n_first_track; /* binary */
        u_char n_last_track; /* binary (not bcd), 0x01...0x63 */
        u_int size_msf; /* time of whole CD, position of LeadOut track */
        u_int size_blk;
        
        u_char TocEnt_nixbyte; /* em */
        u_char TocEnt_ctl_adr;
        u_char TocEnt_number;
        u_char TocEnt_format; /* em */
        u_int TocEnt_address;
#ifdef SAFE_MIXED
        char has_data;
#endif /* SAFE_MIXED */ 
        u_char ored_ctl_adr; /* to detect if CDROM contains data tracks */
        
        struct {
                u_char nixbyte; /* em */
                u_char ctl_adr; /* 0x4x: data, 0x0x: audio */
                u_char number;
                u_char format; /* em */ /* 0x00: lba, 0x01: msf */
                u_int address;
        } TocBuffer[MAX_TRACKS+1]; /* last entry faked */ 
        
        int in_SpinUp; /* CR-52x test flag */
        int n_bytes; /* TEAC awaited response count */
        u_char error_state, b3, b4; /* TEAC command error state */
        u_char f_drv_error; /* TEAC command error flag */
        u_char speed_byte;
        int frmsiz;
        u_char f_XA; /* 1: XA */
        u_char type_byte; /* 0, 1, 3 */
        u_char mode_xb_6;
        u_char mode_yb_7;
        u_char mode_xb_8;
        u_char delay;
        struct cdrom_device_info *sbpcd_infop;
        struct gendisk *disk;
} D_S[NR_SBPCD];

static struct sbpcd_drive *current_drive = D_S;

/*
 * drive space ends here (needed separate for each unit)
 */
/*==========================================================================*/
#if 0
unsigned long cli_sti; /* for saving the processor flags */
#endif
/*==========================================================================*/
static DEFINE_TIMER(delay_timer, mark_timeout_delay, 0, 0);
static DEFINE_TIMER(data_timer, mark_timeout_data, 0, 0);
#if 0
static DEFINE_TIMER(audio_timer, mark_timeout_audio, 0, 0);
#endif
/*==========================================================================*/
/*
 * DDI interface
 */
static void msg(int level, const char *fmt, ...)
{
#if DISTRIBUTION
#define MSG_LEVEL KERN_NOTICE
#else
#define MSG_LEVEL KERN_INFO
#endif /* DISTRIBUTION */

        char buf[256];
        va_list args;
        
        if (!(sbpcd_debug&(1<<level))) return;
        
        msgnum++;
        if (msgnum>99) msgnum=0;
        sprintf(buf, MSG_LEVEL "%s-%d [%02d]:  ", major_name, current_drive - D_S, msgnum);
        va_start(args, fmt);
        vsprintf(&buf[18], fmt, args);
        va_end(args);
        printk(buf);
#if KLOGD_PAUSE
        sbp_sleep(KLOGD_PAUSE); /* else messages get lost */
#endif /* KLOGD_PAUSE */ 
        return;
}
/*==========================================================================*/
/*
 * DDI interface: runtime trace bit pattern maintenance
 */
static int sbpcd_dbg_ioctl(unsigned long arg, int level)
{
        switch(arg)
        {
        case 0: /* OFF */
                sbpcd_debug = DBG_INF;
                break;
                
        default:
                if (arg>=128) sbpcd_debug &= ~(1<<(arg-128));
                else sbpcd_debug |= (1<<arg);
        }
        return (arg);
}
/*==========================================================================*/
static void mark_timeout_delay(u_long i)
{
        timed_out_delay=1;
#if 0
        msg(DBG_TIM,"delay timer expired.\n");
#endif
}
/*==========================================================================*/
static void mark_timeout_data(u_long i)
{
        timed_out_data=1;
#if 0
        msg(DBG_TIM,"data timer expired.\n");
#endif
}
/*==========================================================================*/
#if 0
static void mark_timeout_audio(u_long i)
{
        timed_out_audio=1;
#if 0
        msg(DBG_TIM,"audio timer expired.\n");
#endif
}
#endif
/*==========================================================================*/
/*
 * Wait a little while (used for polling the drive).
 */
static void sbp_sleep(u_int time)
{
        sti();
        schedule_timeout_interruptible(time);
        sti();
}
/*==========================================================================*/
#define RETURN_UP(rc) {up(&ioctl_read_sem); return(rc);}
/*==========================================================================*/
/*
 *  convert logical_block_address to m-s-f_number (3 bytes only)
 */
static INLINE void lba2msf(int lba, u_char *msf)
{
        lba += CD_MSF_OFFSET;
        msf[0] = lba / (CD_SECS*CD_FRAMES);
        lba %= CD_SECS*CD_FRAMES;
        msf[1] = lba / CD_FRAMES;
        msf[2] = lba % CD_FRAMES;
}
/*==========================================================================*/
/*==========================================================================*/
/*
 *  convert msf-bin to msf-bcd
 */
static INLINE void bin2bcdx(u_char *p)  /* must work only up to 75 or 99 */
{
        *p=((*p/10)<<4)|(*p%10);
}
/*==========================================================================*/
static INLINE u_int blk2msf(u_int blk)
{
        MSF msf;
        u_int mm;
        
        msf.c[3] = 0;
        msf.c[2] = (blk + CD_MSF_OFFSET) / (CD_SECS * CD_FRAMES);
        mm = (blk + CD_MSF_OFFSET) % (CD_SECS * CD_FRAMES);
        msf.c[1] = mm / CD_FRAMES;
        msf.c[0] = mm % CD_FRAMES;
        return (msf.n);
}
/*==========================================================================*/
static INLINE u_int make16(u_char rh, u_char rl)
{
        return ((rh<<8)|rl);
}
/*==========================================================================*/
static INLINE u_int make32(u_int rh, u_int rl)
{
        return ((rh<<16)|rl);
}
/*==========================================================================*/
static INLINE u_char swap_nibbles(u_char i)
{
        return ((i<<4)|(i>>4));
}
/*==========================================================================*/
static INLINE u_char byt2bcd(u_char i)
{
        return (((i/10)<<4)+i%10);
}
/*==========================================================================*/
static INLINE u_char bcd2bin(u_char bcd)
{
        return ((bcd>>4)*10+(bcd&0x0F));
}
/*==========================================================================*/
static INLINE int msf2blk(int msfx)
{
        MSF msf;
        int i;
        
        msf.n=msfx;
        i=(msf.c[2] * CD_SECS + msf.c[1]) * CD_FRAMES + msf.c[0] - CD_MSF_OFFSET;
        if (i<0) return (0);
        return (i);
}
/*==========================================================================*/
/*
 *  convert m-s-f_number (3 bytes only) to logical_block_address 
 */
static INLINE int msf2lba(u_char *msf)
{
        int i;
        
        i=(msf[0] * CD_SECS + msf[1]) * CD_FRAMES + msf[2] - CD_MSF_OFFSET;
        if (i<0) return (0);
        return (i);
}
/*==========================================================================*/
/* evaluate cc_ReadError code */ 
static int sta2err(int sta)
{
        if (famT_drive)
        {
                if (sta==0x00) return (0);
                if (sta==0x01) return (-604); /* CRC error */
                if (sta==0x02) return (-602); /* drive not ready */
                if (sta==0x03) return (-607); /* unknown media */
                if (sta==0x04) return (-612); /* general failure */
                if (sta==0x05) return (0);
                if (sta==0x06) return (-ERR_DISKCHANGE); /* disk change */
                if (sta==0x0b) return (-612); /* general failure */
                if (sta==0xff) return (-612); /* general failure */
                return (0);
        }
        else
        {
                if (sta<=2) return (sta);
                if (sta==0x05) return (-604); /* CRC error */
                if (sta==0x06) return (-606); /* seek error */
                if (sta==0x0d) return (-606); /* seek error */
                if (sta==0x0e) return (-603); /* unknown command */
                if (sta==0x14) return (-603); /* unknown command */
                if (sta==0x0c) return (-611); /* read fault */
                if (sta==0x0f) return (-611); /* read fault */
                if (sta==0x10) return (-611); /* read fault */
                if (sta>=0x16) return (-612); /* general failure */
                if (sta==0x11) return (-ERR_DISKCHANGE); /* disk change (LCS: removed) */
                if (famL_drive)
                        if (sta==0x12) return (-ERR_DISKCHANGE); /* disk change (inserted) */
                return (-602); /* drive not ready */
        }
}
/*==========================================================================*/
static INLINE void clr_cmdbuf(void)
{
        int i;
        
        for (i=0;i<10;i++) drvcmd[i]=0;
        cmd_type=0;
}
/*==========================================================================*/
static void flush_status(void)
{
        int i;
        
        sbp_sleep(15*HZ/10);
        for (i=maxtim_data;i!=0;i--) inb(CDi_status);
}
/*====================================================================*/
/*
 * CDi status loop for Teac CD-55A (Rob Riggs)
 *
 * This is needed because for some strange reason
 * the CD-55A can take a real long time to give a
 * status response. This seems to happen after we
 * issue a READ command where a long seek is involved.
 *
 * I tried to ensure that we get max throughput with
 * minimal busy waiting. We busy wait at first, then
 * "switch gears" and start sleeping. We sleep for
 * longer periods of time the longer we wait.
 *
 */
static int CDi_stat_loop_T(void)
{
        int     i, gear=1;
        u_long  timeout_1, timeout_2, timeout_3, timeout_4;

        timeout_1 = jiffies + HZ / 50;  /* sbp_sleep(0) for a short period */
        timeout_2 = jiffies + HZ / 5;   /* nap for no more than 200ms */
        timeout_3 = jiffies + 5 * HZ;   /* sleep for up to 5s */
        timeout_4 = jiffies + 45 * HZ;  /* long sleep for up to 45s. */
        do
          {
            i = inb(CDi_status);
            if (!(i&s_not_data_ready)) return (i);
            if (!(i&s_not_result_ready)) return (i);
            switch(gear)
              {
              case 4:
                sbp_sleep(HZ);
                if (time_after(jiffies, timeout_4)) gear++;
                msg(DBG_TEA, "CDi_stat_loop_T: long sleep active.\n");
                break;
              case 3:
                sbp_sleep(HZ/10);
                if (time_after(jiffies, timeout_3)) gear++;
                break;
              case 2:
                sbp_sleep(HZ/100);
                if (time_after(jiffies, timeout_2)) gear++;
                break;
              case 1:
                sbp_sleep(0);
                if (time_after(jiffies, timeout_1)) gear++;
              }
          } while (gear < 5);
        return -1;
}
/*==========================================================================*/
static int CDi_stat_loop(void)
{
        int i,j;
        
        for(timeout = jiffies + 10*HZ, i=maxtim_data; time_before(jiffies, timeout); )
        {
                for ( ;i!=0;i--)
                {
                        j=inb(CDi_status);
                        if (!(j&s_not_data_ready)) return (j);
                        if (!(j&s_not_result_ready)) return (j);
                        if (fam0L_drive) if (j&s_attention) return (j);
                }
                sbp_sleep(1);
                i = 1;
        }
        msg(DBG_LCS,"CDi_stat_loop failed in line %d\n", __LINE__);
        return (-1);
}
/*==========================================================================*/
#if 00000
/*==========================================================================*/
static int tst_DataReady(void)
{
        int i;
        
        i=inb(CDi_status);
        if (i&s_not_data_ready) return (0);
        return (1);
}
/*==========================================================================*/
static int tst_ResultReady(void)
{
        int i;
        
        i=inb(CDi_status);
        if (i&s_not_result_ready) return (0);
        return (1);
}
/*==========================================================================*/
static int tst_Attention(void)
{
        int i;
        
        i=inb(CDi_status);
        if (i&s_attention) return (1);
        return (0);
}
/*==========================================================================*/
#endif
/*==========================================================================*/
static int ResponseInfo(void)
{
        int i,j,st=0;
        u_long timeout;
        
        for (i=0,timeout=jiffies+HZ;i<response_count;i++) 
        {
                for (j=maxtim_data; ; )
                {
                        for ( ;j!=0;j-- )
                        {
                                st=inb(CDi_status);
                                if (!(st&s_not_result_ready)) break;
                        }
                        if ((j!=0)||time_after_eq(jiffies, timeout)) break;
                        sbp_sleep(1);
                        j = 1;
                }
                if (time_after_eq(jiffies, timeout)) break;
                infobuf[i]=inb(CDi_info);
        }
#if 000
        while (!(inb(CDi_status)&s_not_result_ready))
        {
                infobuf[i++]=inb(CDi_info);
        }
        j=i-response_count;
        if (j>0) msg(DBG_INF,"ResponseInfo: got %d trailing bytes.\n",j);
#endif /* 000 */
        for (j=0;j<i;j++)
                sprintf(&msgbuf[j*3]," %02X",infobuf[j]);
        msgbuf[j*3]=0;
        msg(DBG_CMD,"ResponseInfo:%s (%d,%d)\n",msgbuf,response_count,i);
        j=response_count-i;
        if (j>0) return (-j);
        else return (i);
}
/*==========================================================================*/
static void EvaluateStatus(int st)
{
        current_drive->status_bits=0;
        if (fam1_drive) current_drive->status_bits=st|p_success;
        else if (fam0_drive)
        {
                if (st&p_caddin_old) current_drive->status_bits |= p_door_closed|p_caddy_in;
                if (st&p_spinning) current_drive->status_bits |= p_spinning;
                if (st&p_check) current_drive->status_bits |= p_check;
                if (st&p_success_old) current_drive->status_bits |= p_success;
                if (st&p_busy_old) current_drive->status_bits |= p_busy_new;
                if (st&p_disk_ok) current_drive->status_bits |= p_disk_ok;
        }
        else if (famLV_drive)
        {
                current_drive->status_bits |= p_success;
                if (st&p_caddin_old) current_drive->status_bits |= p_disk_ok|p_caddy_in;
                if (st&p_spinning) current_drive->status_bits |= p_spinning;
                if (st&p_check) current_drive->status_bits |= p_check;
                if (st&p_busy_old) current_drive->status_bits |= p_busy_new;
                if (st&p_lcs_door_closed) current_drive->status_bits |= p_door_closed;
                if (st&p_lcs_door_locked) current_drive->status_bits |= p_door_locked;
        }
        else if (fam2_drive)
        {
                current_drive->status_bits |= p_success;
                if (st&p2_check) current_drive->status_bits |= p1_check;
                if (st&p2_door_closed) current_drive->status_bits |= p1_door_closed;
                if (st&p2_disk_in) current_drive->status_bits |= p1_disk_in;
                if (st&p2_busy1) current_drive->status_bits |= p1_busy;
                if (st&p2_busy2) current_drive->status_bits |= p1_busy;
                if (st&p2_spinning) current_drive->status_bits |= p1_spinning;
                if (st&p2_door_locked) current_drive->status_bits |= p1_door_locked;
                if (st&p2_disk_ok) current_drive->status_bits |= p1_disk_ok;
        }
        else if (famT_drive)
        {
                return; /* still needs to get coded */
                current_drive->status_bits |= p_success;
                if (st&p2_check) current_drive->status_bits |= p1_check;
                if (st&p2_door_closed) current_drive->status_bits |= p1_door_closed;
                if (st&p2_disk_in) current_drive->status_bits |= p1_disk_in;
                if (st&p2_busy1) current_drive->status_bits |= p1_busy;
                if (st&p2_busy2) current_drive->status_bits |= p1_busy;
                if (st&p2_spinning) current_drive->status_bits |= p1_spinning;
                if (st&p2_door_locked) current_drive->status_bits |= p1_door_locked;
                if (st&p2_disk_ok) current_drive->status_bits |= p1_disk_ok;
        }
        return;
}
/*==========================================================================*/
static int cmd_out_T(void);

static int get_state_T(void)
{
        int i;

        clr_cmdbuf();
        current_drive->n_bytes=1;
        drvcmd[0]=CMDT_STATUS;
        i=cmd_out_T();
        if (i>=0) i=infobuf[0];
        else
        {
                msg(DBG_TEA,"get_state_T error %d\n", i);
                return (i);
        }
        if (i>=0)
                /* 2: closed, disk in */
                current_drive->status_bits=p1_door_closed|p1_disk_in|p1_spinning|p1_disk_ok;
        else if (current_drive->error_state==6)
        {
                /* 3: closed, disk in, changed ("06 xx xx") */
                current_drive->status_bits=p1_door_closed|p1_disk_in;
                current_drive->CD_changed=0xFF;
                current_drive->diskstate_flags &= ~toc_bit;
        }
        else if ((current_drive->error_state!=2)||(current_drive->b3!=0x3A)||(current_drive->b4==0x00))
        {
                /* 1: closed, no disk ("xx yy zz"or "02 3A 00") */
                current_drive->status_bits=p1_door_closed;
                current_drive->open_count=0;
        }
        else if (current_drive->b4==0x01)
        {
                /* 0: open ("02 3A 01") */
                current_drive->status_bits=0;
                current_drive->open_count=0;
        }
        else
        {
                /* 1: closed, no disk ("02 3A xx") */
                current_drive->status_bits=p1_door_closed;
                current_drive->open_count=0;
        }
        return (current_drive->status_bits);
}
/*==========================================================================*/
static int ResponseStatus(void)
{
        int i,j;
        u_long timeout;
        
        msg(DBG_STA,"doing ResponseStatus...\n");
        if (famT_drive) return (get_state_T());
        if (flags_cmd_out & f_respo3) timeout = jiffies;
        else if (flags_cmd_out & f_respo2) timeout = jiffies + 16*HZ;
        else timeout = jiffies + 4*HZ;
        j=maxtim_8;
        do
        {
                for ( ;j!=0;j--)
                { 
                        i=inb(CDi_status);
                        if (!(i&s_not_result_ready)) break;
                }
                if ((j!=0)||time_after(jiffies, timeout)) break;
                sbp_sleep(1);
                j = 1;
        }
        while (1);
        if (j==0) 
        {
                if ((flags_cmd_out & f_respo3) == 0)
                        msg(DBG_STA,"ResponseStatus: timeout.\n");
                current_drive->status_bits=0;
                return (-401);
        }
        i=inb(CDi_info);
        msg(DBG_STA,"ResponseStatus: response %02X.\n", i);
        EvaluateStatus(i);
        msg(DBG_STA,"status_bits=%02X, i=%02X\n",current_drive->status_bits,i);
        return (current_drive->status_bits);
}
/*==========================================================================*/
static void cc_ReadStatus(void)
{
        int i;
        
        msg(DBG_STA,"giving cc_ReadStatus command\n");
        if (famT_drive) return;
        SBPCD_CLI;
        if (fam0LV_drive) OUT(CDo_command,CMD0_STATUS);
        else if (fam1_drive) OUT(CDo_command,CMD1_STATUS);
        else if (fam2_drive) OUT(CDo_command,CMD2_STATUS);
        if (!fam0LV_drive) for (i=0;i<6;i++) OUT(CDo_command,0);
        SBPCD_STI;
}
/*==========================================================================*/
static int cc_ReadError(void)
{
        int i;

        clr_cmdbuf();
        msg(DBG_ERR,"giving cc_ReadError command.\n");
        if (fam1_drive)
        {
                drvcmd[0]=CMD1_READ_ERR;
                response_count=8;
                flags_cmd_out=f_putcmd|f_ResponseStatus;
        }
        else if (fam0LV_drive)
        {
                drvcmd[0]=CMD0_READ_ERR;
                response_count=6;
                if (famLV_drive)
                        flags_cmd_out=f_putcmd;
                else
                        flags_cmd_out=f_putcmd|f_getsta|f_ResponseStatus;
        }
        else if (fam2_drive)
        {
                drvcmd[0]=CMD2_READ_ERR;
                response_count=6;
                flags_cmd_out=f_putcmd;
        }
        else if (famT_drive)
        {
                response_count=5;
                drvcmd[0]=CMDT_READ_ERR;
        }
        i=cmd_out();
        current_drive->error_byte=0;
        msg(DBG_ERR,"cc_ReadError: cmd_out(CMDx_READ_ERR) returns %d (%02X)\n",i,i);
        if (i<0) return (i);
        if (fam0V_drive) i=1;
        else i=2;
        current_drive->error_byte=infobuf[i];
        msg(DBG_ERR,"cc_ReadError: infobuf[%d] is %d (%02X)\n",i,current_drive->error_byte,current_drive->error_byte);
        i=sta2err(infobuf[i]);
        if (i==-ERR_DISKCHANGE)
        {
                current_drive->CD_changed=0xFF;
                current_drive->diskstate_flags &= ~toc_bit;
        }
        return (i);
}
/*==========================================================================*/
static int cc_DriveReset(void);

static int cmd_out_T(void)
{
#undef CMDT_TRIES
#define CMDT_TRIES 1000
#define TEST_FALSE_FF 1

        int i, j, l=0, m, ntries;
        unsigned long flags;

        current_drive->error_state=0;
        current_drive->b3=0;
        current_drive->b4=0;
        current_drive->f_drv_error=0;
        for (i=0;i<10;i++) sprintf(&msgbuf[i*3]," %02X",drvcmd[i]);
        msgbuf[i*3]=0;
        msg(DBG_CMD,"cmd_out_T:%s\n",msgbuf);

        OUT(CDo_sel_i_d,0);
        OUT(CDo_enable,current_drive->drv_sel);
        i=inb(CDi_status);
        do_16bit=0;
        if ((f_16bit)&&(!(i&0x80)))
        {
                do_16bit=1;
                msg(DBG_TEA,"cmd_out_T: do_16bit set.\n");
        }
        if (!(i&s_not_result_ready))
        do
        {
                j=inb(CDi_info);
                i=inb(CDi_status);
                sbp_sleep(0);
                msg(DBG_TEA,"cmd_out_T: spurious !s_not_result_ready. (%02X)\n", j);
        }
        while (!(i&s_not_result_ready));
        save_flags(flags); cli();
        for (i=0;i<10;i++) OUT(CDo_command,drvcmd[i]);
        restore_flags(flags);
        for (ntries=CMDT_TRIES;ntries>0;ntries--)
        {
                if (drvcmd[0]==CMDT_READ_VER) sbp_sleep(HZ); /* fixme */
#if 01
                OUT(CDo_sel_i_d,1);
#endif /* 01 */
                if (teac==2)
                  {
                    if ((i=CDi_stat_loop_T()) == -1) break;
                  }
                else
                  {
#if 0
                    OUT(CDo_sel_i_d,1);
#endif /* 0 */ 
                    i=inb(CDi_status);
                  }
                if (!(i&s_not_data_ready)) /* f.e. CMDT_DISKINFO */
                {
                        OUT(CDo_sel_i_d,1);
                        if (drvcmd[0]==CMDT_READ) return (0); /* handled elsewhere */
                        if (drvcmd[0]==CMDT_DISKINFO)
                        {
                                l=0;
                                do
                                {
                                        if (do_16bit)
                                        {
                                                i=inw(CDi_data);
                                                infobuf[l++]=i&0x0ff;
                                                infobuf[l++]=i>>8;
#if TEST_FALSE_FF
                                                if ((l==2)&&(infobuf[0]==0x0ff))
                                                {
                                                        infobuf[0]=infobuf[1];
                                                        l=1;
                                                        msg(DBG_TEA,"cmd_out_T: do_16bit: false first byte!\n");
                                                }
#endif /* TEST_FALSE_FF */ 
                                        }
                                        else infobuf[l++]=inb(CDi_data);
                                        i=inb(CDi_status);
                                }
                                while (!(i&s_not_data_ready));
                                for (j=0;j<l;j++) sprintf(&msgbuf[j*3]," %02X",infobuf[j]);
                                msgbuf[j*3]=0;
                                msg(DBG_CMD,"cmd_out_T data response:%s\n", msgbuf);
                        }
                        else
                        {
                                msg(DBG_TEA,"cmd_out_T: data response with cmd_%02X!\n",
                                    drvcmd[0]);
                                j=0;
                                do
                                {
                                        if (do_16bit) i=inw(CDi_data);
                                        else i=inb(CDi_data);
                                        j++;
                                        i=inb(CDi_status);
                                }
                                while (!(i&s_not_data_ready));
                                msg(DBG_TEA,"cmd_out_T: data response: discarded %d bytes/words.\n", j);
                                fatal_err++;
                        }
                }
                i=inb(CDi_status);
                if (!(i&s_not_result_ready))
                {
                        OUT(CDo_sel_i_d,0);
                        if (drvcmd[0]==CMDT_DISKINFO) m=l;
                        else m=0;
                        do
                        {
                                infobuf[m++]=inb(CDi_info);
                                i=inb(CDi_status);
                        }
                        while (!(i&s_not_result_ready));
                        for (j=0;j<m;j++) sprintf(&msgbuf[j*3]," %02X",infobuf[j]);
                        msgbuf[j*3]=0;
                        msg(DBG_CMD,"cmd_out_T info response:%s\n", msgbuf);
                        if (drvcmd[0]==CMDT_DISKINFO)
                        {
                                infobuf[0]=infobuf[l];
                                if (infobuf[0]!=0x02) return (l); /* data length */
                        }
                        else if (infobuf[0]!=0x02) return (m); /* info length */
                        do
                        {
                                ++recursion;
                                if (recursion>1) msg(DBG_TEA,"cmd_out_T READ_ERR recursion (%02X): %d !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!\n", drvcmd[0], recursion);
                                clr_cmdbuf();
                                drvcmd[0]=CMDT_READ_ERR;
                                j=cmd_out_T(); /* !!! recursive here !!! */
                                --recursion;
                                sbp_sleep(1);
                        }
                        while (j<0);
                        current_drive->error_state=infobuf[2];
                        current_drive->b3=infobuf[3];
                        current_drive->b4=infobuf[4];
                        if (current_drive->f_drv_error)
                        {
                                current_drive->f_drv_error=0;
                                cc_DriveReset();
                                current_drive->error_state=2;
                        }
                        return (-current_drive->error_state-400);
                }
                if (drvcmd[0]==CMDT_READ) return (0); /* handled elsewhere */
                if ((teac==0)||(ntries<(CMDT_TRIES-5))) sbp_sleep(HZ/10);
                else sbp_sleep(HZ/100);
                if (ntries>(CMDT_TRIES-50)) continue;
                msg(DBG_TEA,"cmd_out_T: next CMDT_TRIES (%02X): %d.\n", drvcmd[0], ntries-1);
        }
        current_drive->f_drv_error=1;
        cc_DriveReset();
        current_drive->error_state=2;
        return (-99);
}
/*==========================================================================*/
static int cmd_out(void)
{
        int i=0;
        
        if (famT_drive) return(cmd_out_T());
        
        if (flags_cmd_out&f_putcmd)
        { 
                unsigned long flags;
                for (i=0;i<7;i++)
                        sprintf(&msgbuf[i*3], " %02X", drvcmd[i]);
                msgbuf[i*3]=0;
                msg(DBG_CMD,"cmd_out:%s\n", msgbuf);
                save_flags(flags); cli();
                for (i=0;i<7;i++) OUT(CDo_command,drvcmd[i]);
                restore_flags(flags);
        }
        if (response_count!=0)
        {
                if (cmd_type!=0)
                {
                        if (sbpro_type==1) OUT(CDo_sel_i_d,1);
                        msg(DBG_INF,"misleaded to try ResponseData.\n");
                        if (sbpro_type==1) OUT(CDo_sel_i_d,0);
                        return (-22);
                }
                else i=ResponseInfo();
                if (i<0) return (i);
        }
        if (current_drive->in_SpinUp) msg(DBG_SPI,"in_SpinUp: to CDi_stat_loop.\n");
        if (flags_cmd_out&f_lopsta)
        {
                i=CDi_stat_loop();
                if ((i<0)||!(i&s_attention)) return (-8);
        }
        if (!(flags_cmd_out&f_getsta)) goto LOC_229;
        
 LOC_228:
        if (current_drive->in_SpinUp) msg(DBG_SPI,"in_SpinUp: to cc_ReadStatus.\n");
        cc_ReadStatus();
        
 LOC_229:
        if (flags_cmd_out&f_ResponseStatus) 
        {
                if (current_drive->in_SpinUp) msg(DBG_SPI,"in_SpinUp: to ResponseStatus.\n");
                i=ResponseStatus();
                /* builds status_bits, returns orig. status or p_busy_new */
                if (i<0) return (i);
                if (flags_cmd_out&(f_bit1|f_wait_if_busy))
                {
                        if (!st_check)
                        {
                                if ((flags_cmd_out&f_bit1)&&(i&p_success)) goto LOC_232;
                                if ((!(flags_cmd_out&f_wait_if_busy))||(!st_busy)) goto LOC_228;
                        }
                }
        }
 LOC_232:
        if (!(flags_cmd_out&f_obey_p_check)) return (0);
        if (!st_check) return (0);
        if (current_drive->in_SpinUp) msg(DBG_SPI,"in_SpinUp: to cc_ReadError.\n");
        i=cc_ReadError();
        if (current_drive->in_SpinUp) msg(DBG_SPI,"in_SpinUp: to cmd_out OK.\n");
        msg(DBG_000,"cmd_out: cc_ReadError=%d\n", i);
        return (i);
}
/*==========================================================================*/
static int cc_Seek(u_int pos, char f_blk_msf)
{
        int i;
        
  clr_cmdbuf();
        if (f_blk_msf>1) return (-3);
        if (fam0V_drive)
        {
                drvcmd[0]=CMD0_SEEK;
                if (f_blk_msf==1) pos=msf2blk(pos);
                drvcmd[2]=(pos>>16)&0x00FF;
                drvcmd[3]=(pos>>8)&0x00FF;
                drvcmd[4]=pos&0x00FF;
                if (fam0_drive)
                  flags_cmd_out = f_putcmd | f_respo2 | f_lopsta | f_getsta |
                        f_ResponseStatus | f_obey_p_check | f_bit1;
                else
                  flags_cmd_out = f_putcmd;
        }
        else if (fam1L_drive)
        {
                drvcmd[0]=CMD1_SEEK; /* same as CMD1_ and CMDL_ */
                if (f_blk_msf==0) pos=blk2msf(pos);
                drvcmd[1]=(pos>>16)&0x00FF;
                drvcmd[2]=(pos>>8)&0x00FF;
                drvcmd[3]=pos&0x00FF;
                if (famL_drive)
                        flags_cmd_out=f_putcmd|f_respo2|f_lopsta|f_getsta|f_ResponseStatus|f_obey_p_check|f_bit1;
                else
                        flags_cmd_out=f_putcmd|f_respo2|f_ResponseStatus|f_obey_p_check;
        }
        else if (fam2_drive)
        {
                drvcmd[0]=CMD2_SEEK;
                if (f_blk_msf==0) pos=blk2msf(pos);
                drvcmd[2]=(pos>>24)&0x00FF;
                drvcmd[3]=(pos>>16)&0x00FF;
                drvcmd[4]=(pos>>8)&0x00FF;
                drvcmd[5]=pos&0x00FF;
                flags_cmd_out=f_putcmd|f_ResponseStatus;
        }
        else if (famT_drive)
        {
                drvcmd[0]=CMDT_SEEK;
                if (f_blk_msf==1) pos=msf2blk(pos);
                drvcmd[2]=(pos>>24)&0x00FF;
                drvcmd[3]=(pos>>16)&0x00FF;
                drvcmd[4]=(pos>>8)&0x00FF;
                drvcmd[5]=pos&0x00FF;
                current_drive->n_bytes=1;
        }
        response_count=0;
        i=cmd_out();
        return (i);
}
/*==========================================================================*/
static int cc_SpinUp(void)
{
        int i;
        
        msg(DBG_SPI,"SpinUp.\n");
        current_drive->in_SpinUp = 1;
        clr_cmdbuf();
        if (fam0LV_drive)
        {
                drvcmd[0]=CMD0_SPINUP;
                if (fam0L_drive)
                  flags_cmd_out=f_putcmd|f_respo2|f_lopsta|f_getsta|
                    f_ResponseStatus|f_obey_p_check|f_bit1;
                else
                  flags_cmd_out=f_putcmd;
        }
        else if (fam1_drive)
        {
                drvcmd[0]=CMD1_SPINUP;
                flags_cmd_out=f_putcmd|f_respo2|f_ResponseStatus|f_obey_p_check;
        }
        else if (fam2_drive)
        {
                drvcmd[0]=CMD2_TRAY_CTL;
                drvcmd[4]=0x01; /* "spinup" */
                flags_cmd_out=f_putcmd|f_respo2|f_ResponseStatus|f_obey_p_check;
        }
        else if (famT_drive)
        {
                drvcmd[0]=CMDT_TRAY_CTL;
                drvcmd[4]=0x03; /* "insert", it hopefully spins the drive up */
        }
        response_count=0;
        i=cmd_out();
        current_drive->in_SpinUp = 0;
        return (i);
}
/*==========================================================================*/
static int cc_SpinDown(void)
{
        int i;
        
        if (fam0_drive) return (0);
        clr_cmdbuf();
        response_count=0;
        if (fam1_drive)
        {
                drvcmd[0]=CMD1_SPINDOWN;
                flags_cmd_out=f_putcmd|f_respo2|f_ResponseStatus|f_obey_p_check;
        }
        else if (fam2_drive)
        {
                drvcmd[0]=CMD2_TRAY_CTL;
                drvcmd[4]=0x02; /* "eject" */
                flags_cmd_out=f_putcmd|f_ResponseStatus;
        }
        else if (famL_drive)
        {
                drvcmd[0]=CMDL_SPINDOWN;
                drvcmd[1]=1;
                flags_cmd_out=f_putcmd|f_respo2|f_lopsta|f_getsta|f_ResponseStatus|f_obey_p_check|f_bit1;
        }
        else if (famV_drive)
        {
                drvcmd[0]=CMDV_SPINDOWN;
                flags_cmd_out=f_putcmd;
        }
        else if (famT_drive)
        {
                drvcmd[0]=CMDT_TRAY_CTL;
                drvcmd[4]=0x02; /* "eject" */
        }
        i=cmd_out();
        return (i);
}
/*==========================================================================*/
static int cc_get_mode_T(void)
{
        int i;
        
        clr_cmdbuf();
        response_count=10;
        drvcmd[0]=CMDT_GETMODE;
        drvcmd[4]=response_count;
        i=cmd_out_T();
        return (i);
}
/*==========================================================================*/
static int cc_set_mode_T(void)
{
        int i;
        
        clr_cmdbuf();
        response_count=1;
        drvcmd[0]=CMDT_SETMODE;
        drvcmd[1]=current_drive->speed_byte;
        drvcmd[2]=current_drive->frmsiz>>8;
        drvcmd[3]=current_drive->frmsiz&0x0FF;
        drvcmd[4]=current_drive->f_XA; /* 1: XA */
        drvcmd[5]=current_drive->type_byte; /* 0, 1, 3 */
        drvcmd[6]=current_drive->mode_xb_6;
        drvcmd[7]=current_drive->mode_yb_7|current_drive->volume_control;
        drvcmd[8]=current_drive->mode_xb_8;
        drvcmd[9]=current_drive->delay;
        i=cmd_out_T();
        return (i);
}
/*==========================================================================*/
static int cc_prep_mode_T(void)
{
        int i, j;
        
        i=cc_get_mode_T();
        if (i<0) return (i);
        for (i=0;i<10;i++)
                sprintf(&msgbuf[i*3], " %02X", infobuf[i]);
        msgbuf[i*3]=0;
        msg(DBG_TEA,"CMDT_GETMODE:%s\n", msgbuf);
        current_drive->speed_byte=0x02; /* 0x02: auto quad, 0x82: quad, 0x81: double, 0x80: single */
        current_drive->frmsiz=make16(infobuf[2],infobuf[3]);
        current_drive->f_XA=infobuf[4];
        if (current_drive->f_XA==0) current_drive->type_byte=0;
        else current_drive->type_byte=1;
        current_drive->mode_xb_6=infobuf[6];
        current_drive->mode_yb_7=1;
        current_drive->mode_xb_8=infobuf[8];
        current_drive->delay=0; /* 0, 1, 2, 3 */
        j=cc_set_mode_T();
        i=cc_get_mode_T();
        for (i=0;i<10;i++)
                sprintf(&msgbuf[i*3], " %02X", infobuf[i]);
        msgbuf[i*3]=0;
        msg(DBG_TEA,"CMDT_GETMODE:%s\n", msgbuf);
        return (j);
}
/*==========================================================================*/
static int cc_SetSpeed(u_char speed, u_char x1, u_char x2)
{
        int i;
        
        if (fam0LV_drive) return (0);
        clr_cmdbuf();
        response_count=0;
        if (fam1_drive)
        {
                drvcmd[0]=CMD1_SETMODE;
                drvcmd[1]=0x03;
                drvcmd[2]=speed;
                drvcmd[3]=x1;
                drvcmd[4]=x2;
                flags_cmd_out=f_putcmd|f_ResponseStatus|f_obey_p_check;
        }
        else if (fam2_drive)
        {
                drvcmd[0]=CMD2_SETSPEED;
                if (speed&speed_auto)
                {
                        drvcmd[2]=0xFF;
                        drvcmd[3]=0xFF;
                }
                else
                {
                        drvcmd[2]=0;
                        drvcmd[3]=150;
                }
                flags_cmd_out=f_putcmd|f_ResponseStatus|f_obey_p_check;
        }
        else if (famT_drive)
        {
                return (0);
        }
        i=cmd_out();
        return (i);
}
/*==========================================================================*/
static int cc_SetVolume(void)
{
        int i;
        u_char channel0,channel1,volume0,volume1;
        u_char control0,value0,control1,value1;
        
        current_drive->diskstate_flags &= ~volume_bit;
        clr_cmdbuf();
        channel0=current_drive->vol_chan0;
        volume0=current_drive->vol_ctrl0;
        channel1=control1=current_drive->vol_chan1;
        volume1=value1=current_drive->vol_ctrl1;
        control0=value0=0;
        
        if (famV_drive) return (0);

        if (((current_drive->drv_options&audio_mono)!=0)&&(current_drive->drv_type>=drv_211))
        {
                if ((volume0!=0)&&(volume1==0))
                {
                        volume1=volume0;
                        channel1=channel0;
                }
                else if ((volume0==0)&&(volume1!=0))
                {
                        volume0=volume1;
                        channel0=channel1;
                }
        }
        if (channel0>1)
        {
                channel0=0;
                volume0=0;
        }
        if (channel1>1)
        {
                channel1=1;
                volume1=0;
        }
        
        if (fam1_drive)
        {
                control0=channel0+1;
                control1=channel1+1;
                value0=(volume0>volume1)?volume0:volume1;
                value1=value0;
                if (volume0==0) control0=0;
                if (volume1==0) control1=0;
                drvcmd[0]=CMD1_SETMODE;
                drvcmd[1]=0x05;
                drvcmd[3]=control0;
                drvcmd[4]=value0;
                drvcmd[5]=control1;
                drvcmd[6]=value1;
                flags_cmd_out=f_putcmd|f_ResponseStatus|f_obey_p_check;
        }
        else if (fam2_drive)
        {
                control0=channel0+1;
                control1=channel1+1;
                value0=(volume0>volume1)?volume0:volume1;
                value1=value0;
                if (volume0==0) control0=0;
                if (volume1==0) control1=0;
                drvcmd[0]=CMD2_SETMODE;
                drvcmd[1]=0x0E;
                drvcmd[3]=control0;
                drvcmd[4]=value0;
                drvcmd[5]=control1;
                drvcmd[6]=value1;
                flags_cmd_out=f_putcmd|f_ResponseStatus;
        }
        else if (famL_drive)
        {
                if ((volume0==0)||(channel0!=0)) control0 |= 0x80;
                if ((volume1==0)||(channel1!=1)) control0 |= 0x40;
                if (volume0|volume1) value0=0x80;
                drvcmd[0]=CMDL_SETMODE;
                drvcmd[1]=0x03;
                drvcmd[4]=control0;
                drvcmd[5]=value0;
                flags_cmd_out=f_putcmd|f_lopsta|f_getsta|f_ResponseStatus|f_obey_p_check|f_bit1;
        }
        else if (fam0_drive) /* different firmware levels */
        {
                if (current_drive->drv_type>=drv_300)
                {
                        control0=volume0&0xFC;
                        value0=volume1&0xFC;
                        if ((volume0!=0)&&(volume0<4)) control0 |= 0x04;
                        if ((volume1!=0)&&(volume1<4)) value0 |= 0x04;
                        if (channel0!=0) control0 |= 0x01;
                        if (channel1==1) value0 |= 0x01;
                }
                else
                {
                        value0=(volume0>volume1)?volume0:volume1;
                        if (current_drive->drv_type<drv_211)
                        {
                                if (channel0!=0)
                                {
                                        i=channel1;
                                        channel1=channel0;
                                        channel0=i;
                                        i=volume1;
                                        volume1=volume0;
                                        volume0=i;
                                }
                                if (channel0==channel1)
                                {
                                        if (channel0==0)
                                        {
                                                channel1=1;
                                                volume1=0;
                                                volume0=value0;
                                        }
                                        else
                                        {
                                                channel0=0;
                                                volume0=0;
                                                volume1=value0;
                                        }
                                }
                        }
                        
                        if ((volume0!=0)&&(volume1!=0))
                        {
                                if (volume0==0xFF) volume1=0xFF;
                                else if (volume1==0xFF) volume0=0xFF;
                        }
                        else if (current_drive->drv_type<drv_201) volume0=volume1=value0;
                        
                        if (current_drive->drv_type>=drv_201)
                        {
                                if (volume0==0) control0 |= 0x80;
                                if (volume1==0) control0 |= 0x40;
                        }
                        if (current_drive->drv_type>=drv_211)
                        {
                                if (channel0!=0) control0 |= 0x20;
                                if (channel1!=1) control0 |= 0x10;
                        }
                }
                drvcmd[0]=CMD0_SETMODE;
                drvcmd[1]=0x83;
                drvcmd[4]=control0;
                drvcmd[5]=value0;
                flags_cmd_out=f_putcmd|f_getsta|f_ResponseStatus|f_obey_p_check;
        }
        else if (famT_drive)
        {
                current_drive->volume_control=0;
                if (!volume0) current_drive->volume_control|=0x10;
                if (!volume1) current_drive->volume_control|=0x20;
                i=cc_prep_mode_T();
                if (i<0) return (i);
        }
        if (!famT_drive)
        {
                response_count=0;
                i=cmd_out();
                if (i<0) return (i);
        }
        current_drive->diskstate_flags |= volume_bit;
        return (0);
}
/*==========================================================================*/
static int GetStatus(void)
{
        int i;
        
        if (famT_drive) return (0);
        flags_cmd_out=f_getsta|f_ResponseStatus|f_obey_p_check;
        response_count=0;
        cmd_type=0;
        i=cmd_out();
        return (i);
}
/*==========================================================================*/
static int cc_DriveReset(void)
{
        int i;
        
        msg(DBG_RES,"cc_DriveReset called.\n");
        clr_cmdbuf();
        response_count=0;
        if (fam0LV_drive) OUT(CDo_reset,0x00);
        else if (fam1_drive)
        {
                drvcmd[0]=CMD1_RESET;
                flags_cmd_out=f_putcmd;
                i=cmd_out();
        }
        else if (fam2_drive)
        {
                drvcmd[0]=CMD2_RESET;
                flags_cmd_out=f_putcmd;
                i=cmd_out();
                OUT(CDo_reset,0x00);
        }
        else if (famT_drive)
        {
                OUT(CDo_sel_i_d,0);
                OUT(CDo_enable,current_drive->drv_sel);
                OUT(CDo_command,CMDT_RESET);
                for (i=1;i<10;i++) OUT(CDo_command,0);
        }
        if (fam0LV_drive) sbp_sleep(5*HZ); /* wait 5 seconds */
        else sbp_sleep(1*HZ); /* wait a second */
#if 1
        if (famT_drive)
        {
                msg(DBG_TEA, "================CMDT_RESET given=================.\n");
                sbp_sleep(3*HZ);
        }
#endif /* 1 */ 
        flush_status();
        i=GetStatus();
        if (i<0) return i;
        if (!famT_drive)
                if (current_drive->error_byte!=aud_12) return -501;
        return (0);
}

/*==========================================================================*/
static int SetSpeed(void)
{
        int i, speed;
        
        if (!(current_drive->drv_options&(speed_auto|speed_300|speed_150))) return (0);
        speed=speed_auto;
        if (!(current_drive->drv_options&speed_auto))
        {
                speed |= speed_300;
                if (!(current_drive->drv_options&speed_300)) speed=0;
        }
        i=cc_SetSpeed(speed,0,0);
        return (i);
}

static void switch_drive(struct sbpcd_drive *);

static int sbpcd_select_speed(struct cdrom_device_info *cdi, int speed)
{
        struct sbpcd_drive *p = cdi->handle;
        if (p != current_drive)
                switch_drive(p);

        return cc_SetSpeed(speed == 2 ? speed_300 : speed_150, 0, 0);
}

/*==========================================================================*/
static int DriveReset(void)
{
        int i;
        
        i=cc_DriveReset();
        if (i<0) return (-22);
        do
        {
                i=GetStatus();
                if ((i<0)&&(i!=-ERR_DISKCHANGE)) {
                        return (-2); /* from sta2err */
                }
                if (!st_caddy_in) break;
                sbp_sleep(1);
        }
        while (!st_diskok);
#if 000
        current_drive->CD_changed=1;
#endif
        if ((st_door_closed) && (st_caddy_in))
        {
                i=DiskInfo();
                if (i<0) return (-23);
        }
        return (0);
}

static int sbpcd_reset(struct cdrom_device_info *cdi)
{
        struct sbpcd_drive *p = cdi->handle;
        if (p != current_drive)
                switch_drive(p);
        return DriveReset();
}

/*==========================================================================*/
static int cc_PlayAudio(int pos_audio_start,int pos_audio_end)
{
        int i, j, n;
        
        if (current_drive->audio_state==audio_playing) return (-EINVAL);
        clr_cmdbuf();
        response_count=0;
        if (famLV_drive)
        {
                drvcmd[0]=CMDL_PLAY;
                i=msf2blk(pos_audio_start);
                n=msf2blk(pos_audio_end)+1-i;
                drvcmd[1]=(i>>16)&0x00FF;
                drvcmd[2]=(i>>8)&0x00FF;
                drvcmd[3]=i&0x00FF;
                drvcmd[4]=(n>>16)&0x00FF;
                drvcmd[5]=(n>>8)&0x00FF;
                drvcmd[6]=n&0x00FF;
                if (famL_drive)
                flags_cmd_out = f_putcmd | f_respo2 | f_lopsta | f_getsta |
                        f_ResponseStatus | f_obey_p_check | f_wait_if_busy;
                else
                  flags_cmd_out = f_putcmd;
        }
        else
        {
                j=1;
                if (fam1_drive)
                {
                        drvcmd[0]=CMD1_PLAY_MSF;
                        flags_cmd_out = f_putcmd | f_respo2 | f_ResponseStatus |
                                f_obey_p_check | f_wait_if_busy;
                }
                else if (fam2_drive)
                {
                        drvcmd[0]=CMD2_PLAY_MSF;
                        flags_cmd_out = f_putcmd | f_ResponseStatus | f_obey_p_check;
                }
                else if (famT_drive)
                {
                        drvcmd[0]=CMDT_PLAY_MSF;
                        j=3;
                        response_count=1;
                }
                else if (fam0_drive)
                {
                        drvcmd[0]=CMD0_PLAY_MSF;
                        flags_cmd_out = f_putcmd | f_respo2 | f_lopsta | f_getsta |
                                f_ResponseStatus | f_obey_p_check | f_wait_if_busy;
                }
                drvcmd[j]=(pos_audio_start>>16)&0x00FF;
                drvcmd[j+1]=(pos_audio_start>>8)&0x00FF;
                drvcmd[j+2]=pos_audio_start&0x00FF;
                drvcmd[j+3]=(pos_audio_end>>16)&0x00FF;
                drvcmd[j+4]=(pos_audio_end>>8)&0x00FF;
                drvcmd[j+5]=pos_audio_end&0x00FF;
        }
        i=cmd_out();
        return (i);
}
/*==========================================================================*/
static int cc_Pause_Resume(int pau_res)
{
        int i;
        
        clr_cmdbuf();
        response_count=0;
        if (fam1_drive)
        {
                drvcmd[0]=CMD1_PAU_RES;
                if (pau_res!=1) drvcmd[1]=0x80;
                flags_cmd_out=f_putcmd|f_respo2|f_ResponseStatus|f_obey_p_check;
        }
        else if (fam2_drive)
        {
                drvcmd[0]=CMD2_PAU_RES;
                if (pau_res!=1) drvcmd[2]=0x01;
                flags_cmd_out=f_putcmd|f_ResponseStatus;
        }
        else if (fam0LV_drive)
        {
                drvcmd[0]=CMD0_PAU_RES;
                if (pau_res!=1) drvcmd[1]=0x80;
                if (famL_drive)
                        flags_cmd_out=f_putcmd|f_respo2|f_lopsta|f_getsta|f_ResponseStatus|
                                f_obey_p_check|f_bit1;
                else if (famV_drive)
                  flags_cmd_out=f_putcmd;
                else
                        flags_cmd_out=f_putcmd|f_respo2|f_lopsta|f_getsta|f_ResponseStatus|
                                f_obey_p_check;
        }
        else if (famT_drive)
        {
                if (pau_res==3) return (cc_PlayAudio(current_drive->pos_audio_start,current_drive->pos_audio_end));
                else if (pau_res==1) drvcmd[0]=CMDT_PAUSE;
                else return (-56);
        }
        i=cmd_out();
        return (i);
}
/*==========================================================================*/
static int cc_LockDoor(char lock)
{
        int i;
        
        if (fam0_drive) return (0);
        msg(DBG_LCK,"cc_LockDoor: %d (drive %d)\n", lock, current_drive - D_S);
        msg(DBG_LCS,"p_door_locked bit %d before\n", st_door_locked);
        clr_cmdbuf();
        response_count=0;
        if (fam1_drive)
        {
                drvcmd[0]=CMD1_LOCK_CTL;
                if (lock==1) drvcmd[1]=0x01;
                flags_cmd_out=f_putcmd|f_ResponseStatus|f_obey_p_check;
        }
        else if (fam2_drive)
        {
                drvcmd[0]=CMD2_LOCK_CTL;
                if (lock==1) drvcmd[4]=0x01;
                flags_cmd_out=f_putcmd|f_ResponseStatus;
        }
        else if (famLV_drive)
        {
                drvcmd[0]=CMDL_LOCK_CTL;
                if (lock==1) drvcmd[1]=0x01;
                if (famL_drive)
                  flags_cmd_out=f_putcmd|f_respo2|f_lopsta|f_getsta|f_ResponseStatus|f_obey_p_check|f_bit1;
                else
                  flags_cmd_out=f_putcmd;
        }
        else if (famT_drive)
        {
                drvcmd[0]=CMDT_LOCK_CTL;
                if (lock==1) drvcmd[4]=0x01;
        }
        i=cmd_out();
        msg(DBG_LCS,"p_door_locked bit %d after\n", st_door_locked);
        return (i);
}
/*==========================================================================*/
/*==========================================================================*/
static int UnLockDoor(void)
{
        int i,j;
        
        j=20;
        do
        {
                i=cc_LockDoor(0);
                --j;
                sbp_sleep(1);
        }
        while ((i<0)&&(j));
        if (i<0)
        {
                cc_DriveReset();
                return -84;
        }
        return (0);
}
/*==========================================================================*/
static int LockDoor(void)
{
        int i,j;
        
        j=20;
        do
        {
                i=cc_LockDoor(1);
                --j;
                sbp_sleep(1);
        }
        while ((i<0)&&(j));
        if (j==0)
        {               
                cc_DriveReset();
                j=20;
                do
                {
                        i=cc_LockDoor(1);
                        --j;
                        sbp_sleep(1);
                }
                while ((i<0)&&(j));
        }
        return (i);
}

static int sbpcd_lock_door(struct cdrom_device_info *cdi, int lock)
{
  return lock ? LockDoor() : UnLockDoor();
}

/*==========================================================================*/
static int cc_CloseTray(void)
{
        int i;
        
        if (fam0_drive) return (0);
        msg(DBG_LCK,"cc_CloseTray (drive %d)\n", current_drive - D_S);
        msg(DBG_LCS,"p_door_closed bit %d before\n", st_door_closed);
        
        clr_cmdbuf();
        response_count=0;
        if (fam1_drive)
        {
                drvcmd[0]=CMD1_TRAY_CTL;
                flags_cmd_out=f_putcmd|f_respo2|f_ResponseStatus|f_obey_p_check;
        }
        else if (fam2_drive)
        {
                drvcmd[0]=CMD2_TRAY_CTL;
                drvcmd[1]=0x01;
                drvcmd[4]=0x03; /* "insert" */
                flags_cmd_out=f_putcmd|f_ResponseStatus;
        }
        else if (famLV_drive)
        {
                drvcmd[0]=CMDL_TRAY_CTL;
                if (famLV_drive)
                  flags_cmd_out=f_putcmd|f_respo2|f_lopsta|f_getsta|
                        f_ResponseStatus|f_obey_p_check|f_bit1;
                else
                  flags_cmd_out=f_putcmd;
        }
        else if (famT_drive)
        {
                drvcmd[0]=CMDT_TRAY_CTL;
                drvcmd[4]=0x03; /* "insert" */
        }
        i=cmd_out();
        msg(DBG_LCS,"p_door_closed bit %d after\n", st_door_closed);

        i=cc_ReadError();
        flags_cmd_out |= f_respo2;
        cc_ReadStatus(); /* command: give 1-byte status */
        i=ResponseStatus();
        if (famT_drive&&(i<0))
        {
                cc_DriveReset();
                i=ResponseStatus();
#if 0
                sbp_sleep(HZ);
#endif /* 0 */ 
                i=ResponseStatus();
        }
        if (i<0)
        {
                msg(DBG_INF,"sbpcd cc_CloseTray: ResponseStatus timed out (%d).\n",i);
        }
        if (!(famT_drive))
        {
                if (!st_spinning)
                {
                        cc_SpinUp();
                        if (st_check) i=cc_ReadError();
                        flags_cmd_out |= f_respo2;
                        cc_ReadStatus();
                        i=ResponseStatus();
                } else {
                }
        }
        i=DiskInfo();
        return (i);
}

static int sbpcd_tray_move(struct cdrom_device_info *cdi, int position)
{
        int retval=0;
        switch_drive(cdi->handle);
        /* DUH! --AJK */
        if(current_drive->CD_changed != 0xFF) {
                current_drive->CD_changed=0xFF;
                current_drive->diskstate_flags &= ~cd_size_bit;
        }
        if (position == 1) {
                cc_SpinDown();
        } else {
                retval=cc_CloseTray();
        }
  return retval;
}

/*==========================================================================*/
static int cc_ReadSubQ(void)
{
        int i,j;

        current_drive->diskstate_flags &= ~subq_bit;
        for (j=255;j>0;j--)
        {
                clr_cmdbuf();
                if (fam1_drive)
                {
                        drvcmd[0]=CMD1_READSUBQ;
                        flags_cmd_out=f_putcmd|f_ResponseStatus|f_obey_p_check;
                        response_count=11;
                }
                else if (fam2_drive)
                {
                        drvcmd[0]=CMD2_READSUBQ;
                        drvcmd[1]=0x02;
                        drvcmd[3]=0x01;
                        flags_cmd_out=f_putcmd;
                        response_count=10;
                }
                else if (fam0LV_drive)
                {
                        drvcmd[0]=CMD0_READSUBQ;
                        drvcmd[1]=0x02;
                        if (famLV_drive)
                                flags_cmd_out=f_putcmd;
                        else
                                flags_cmd_out=f_putcmd|f_getsta|f_ResponseStatus|f_obey_p_check;
                        response_count=13;
                }
                else if (famT_drive)
                {
                        response_count=12;
                        drvcmd[0]=CMDT_READSUBQ;
                        drvcmd[1]=0x02;
                        drvcmd[2]=0x40;
                        drvcmd[3]=0x01;
                        drvcmd[8]=response_count;
                }
                i=cmd_out();
                if (i<0) return (i);
                for (i=0;i<response_count;i++)
                {
                        sprintf(&msgbuf[i*3], " %02X", infobuf[i]);
                        msgbuf[i*3]=0;
                        msg(DBG_SQ1,"cc_ReadSubQ:%s\n", msgbuf);
                }
                if (famT_drive) break;
                if (infobuf[0]!=0) break;
                if ((!st_spinning) || (j==1))
                {
                        current_drive->SubQ_ctl_adr=current_drive->SubQ_trk=current_drive->SubQ_pnt_idx=current_drive->SubQ_whatisthis=0;
                        current_drive->SubQ_run_tot=current_drive->SubQ_run_trk=0;
                        return (0);
                }
        }
        if (famT_drive) current_drive->SubQ_ctl_adr=infobuf[1];
        else current_drive->SubQ_ctl_adr=swap_nibbles(infobuf[1]);
        current_drive->SubQ_trk=byt2bcd(infobuf[2]);
        current_drive->SubQ_pnt_idx=byt2bcd(infobuf[3]);
        if (fam0LV_drive) i=5;
        else if (fam12_drive) i=4;
        else if (famT_drive) i=8;
        current_drive->SubQ_run_tot=make32(make16(0,infobuf[i]),make16(infobuf[i+1],infobuf[i+2])); /* msf-bin */
        i=7;
        if (fam0LV_drive) i=9;
        else if (fam12_drive) i=7;
        else if (famT_drive) i=4;
        current_drive->SubQ_run_trk=make32(make16(0,infobuf[i]),make16(infobuf[i+1],infobuf[i+2])); /* msf-bin */
        current_drive->SubQ_whatisthis=infobuf[i+3];
        current_drive->diskstate_flags |= subq_bit;
        return (0);
}
/*==========================================================================*/
static int cc_ModeSense(void)
{
        int i;
        
        if (fam2_drive) return (0);
        if (famV_drive) return (0);
        current_drive->diskstate_flags &= ~frame_size_bit;
        clr_cmdbuf();
        if (fam1_drive)
        {
                response_count=5;
                drvcmd[0]=CMD1_GETMODE;
                flags_cmd_out=f_putcmd|f_ResponseStatus|f_obey_p_check;
        }
        else if (fam0L_drive)
        {
                response_count=2;
                drvcmd[0]=CMD0_GETMODE;
                if (famL_drive) flags_cmd_out=f_putcmd;
                else flags_cmd_out=f_putcmd|f_getsta|f_ResponseStatus|f_obey_p_check;
        }
        else if (famT_drive)
        {
                response_count=10;
                drvcmd[0]=CMDT_GETMODE;
                drvcmd[4]=response_count;
        }
        i=cmd_out();
        if (i<0) return (i);
        i=0;
        current_drive->sense_byte=0;
        if (fam1_drive) current_drive->sense_byte=infobuf[i++];
        else if (famT_drive)
        {
                if (infobuf[4]==0x01) current_drive->xa_byte=0x20;
                else current_drive->xa_byte=0;
                i=2;
        }
        current_drive->frame_size=make16(infobuf[i],infobuf[i+1]);
        for (i=0;i<response_count;i++)
                sprintf(&msgbuf[i*3], " %02X", infobuf[i]);
        msgbuf[i*3]=0;
        msg(DBG_XA1,"cc_ModeSense:%s\n", msgbuf);
        
        current_drive->diskstate_flags |= frame_size_bit;
        return (0);
}
/*==========================================================================*/
/*==========================================================================*/
static int cc_ModeSelect(int framesize)
{
        int i;
        
        if (fam2_drive) return (0);
        if (famV_drive) return (0);
        current_drive->diskstate_flags &= ~frame_size_bit;
        clr_cmdbuf();
        current_drive->frame_size=framesize;
        if (framesize==CD_FRAMESIZE_RAW) current_drive->sense_byte=0x82;
        else current_drive->sense_byte=0x00;
        
        msg(DBG_XA1,"cc_ModeSelect: %02X %04X\n",
            current_drive->sense_byte, current_drive->frame_size);
        
        if (fam1_drive)
        {
                drvcmd[0]=CMD1_SETMODE;
                drvcmd[1]=0x00;
                drvcmd[2]=current_drive->sense_byte;
                drvcmd[3]=(current_drive->frame_size>>8)&0xFF;
                drvcmd[4]=current_drive->frame_size&0xFF;
                flags_cmd_out=f_putcmd|f_ResponseStatus|f_obey_p_check;
        }
        else if (fam0L_drive)
        {
                drvcmd[0]=CMD0_SETMODE;
                drvcmd[1]=0x00;
                drvcmd[2]=(current_drive->frame_size>>8)&0xFF;
                drvcmd[3]=current_drive->frame_size&0xFF;
                drvcmd[4]=0x00;
                if(famL_drive)
                        flags_cmd_out=f_putcmd|f_lopsta|f_getsta|f_ResponseStatus|f_obey_p_check;
                else
                        flags_cmd_out=f_putcmd|f_getsta|f_ResponseStatus|f_obey_p_check;
        }
        else if (famT_drive)
        {
                return (-1);
        }
        response_count=0;
        i=cmd_out();
        if (i<0) return (i);
        current_drive->diskstate_flags |= frame_size_bit;
        return (0);
}
/*==========================================================================*/
static int cc_GetVolume(void)
{
        int i;
        u_char switches;
        u_char chan0=0;
        u_char vol0=0;
        u_char chan1=1;
        u_char vol1=0;
        
        if (famV_drive) return (0);
        current_drive->diskstate_flags &= ~volume_bit;
        clr_cmdbuf();
        if (fam1_drive)
        {
                drvcmd[0]=CMD1_GETMODE;
                drvcmd[1]=0x05;
                response_count=5;
                flags_cmd_out=f_putcmd|f_ResponseStatus|f_obey_p_check;
        }
        else if (fam2_drive)
        {
                drvcmd[0]=CMD2_GETMODE;
                drvcmd[1]=0x0E;
                response_count=5;
                flags_cmd_out=f_putcmd;
        }
        else if (fam0L_drive)
        {
                drvcmd[0]=CMD0_GETMODE;
                drvcmd[1]=0x03;
                response_count=2;
                if(famL_drive)
                        flags_cmd_out=f_putcmd;
                else
                        flags_cmd_out=f_putcmd|f_getsta|f_ResponseStatus|f_obey_p_check;
        }
        else if (famT_drive)
        {
                i=cc_get_mode_T();
                if (i<0) return (i);
        }
        if (!famT_drive)
        {
                i=cmd_out();
                if (i<0) return (i);
        }
        if (fam1_drive)
        {
                chan0=infobuf[1]&0x0F;
                vol0=infobuf[2];
                chan1=infobuf[3]&0x0F;
                vol1=infobuf[4];
                if (chan0==0)
                {
                        chan0=1;
                        vol0=0;
                }
                if (chan1==0)
                {
                        chan1=2;
                        vol1=0;
                }
                chan0 >>= 1;
                chan1 >>= 1;
        }
        else if (fam2_drive)
        {
                chan0=infobuf[1];
                vol0=infobuf[2];
                chan1=infobuf[3];
                vol1=infobuf[4];
        }
        else if (famL_drive)
        {
                chan0=0;
                chan1=1;
                vol0=vol1=infobuf[1];
                switches=infobuf[0];
                if ((switches&0x80)!=0) chan0=1;
                if ((switches&0x40)!=0) chan1=0;
        }
        else if (fam0_drive) /* different firmware levels */
        {
                chan0=0;
                chan1=1;
                vol0=vol1=infobuf[1];
                if (current_drive->drv_type>=drv_201)
                {
                        if (current_drive->drv_type<drv_300)
                        {
                                switches=infobuf[0];
                                if ((switches&0x80)!=0) vol0=0;
                                if ((switches&0x40)!=0) vol1=0;
                                if (current_drive->drv_type>=drv_211)
                                {
                                        if ((switches&0x20)!=0) chan0=1;
                                        if ((switches&0x10)!=0) chan1=0;
                                }
                        }
                        else
                        {
                                vol0=infobuf[0];
                                if ((vol0&0x01)!=0) chan0=1;
                                if ((vol1&0x01)==0) chan1=0;
                                vol0 &= 0xFC;
                                vol1 &= 0xFC;
                                if (vol0!=0) vol0 += 3;
                                if (vol1!=0) vol1 += 3;
                        }
                }
        }
        else if (famT_drive)
        {
                current_drive->volume_control=infobuf[7];
                chan0=0;
                chan1=1;
                if (current_drive->volume_control&0x10) vol0=0;
                else vol0=0xff;
                if (current_drive->volume_control&0x20) vol1=0;
                else vol1=0xff;
        }
        current_drive->vol_chan0=chan0;
        current_drive->vol_ctrl0=vol0;
        current_drive->vol_chan1=chan1;
        current_drive->vol_ctrl1=vol1;
#if 000
        current_drive->vol_chan2=2;
        current_drive->vol_ctrl2=0xFF;
        current_drive->vol_chan3=3;
        current_drive->vol_ctrl3=0xFF;
#endif /*  000 */
        current_drive->diskstate_flags |= volume_bit;
        return (0);
}
/*==========================================================================*/
static int cc_ReadCapacity(void)
{
        int i, j;
        
        if (fam2_drive) return (0); /* some firmware lacks this command */
        if (famLV_drive) return (0); /* some firmware lacks this command */
        if (famT_drive) return (0); /* done with cc_ReadTocDescr() */
        current_drive->diskstate_flags &= ~cd_size_bit;
        for (j=3;j>0;j--)
        {
                clr_cmdbuf();
                if (fam1_drive)
                {
                        drvcmd[0]=CMD1_CAPACITY;
                        response_count=5;
                        flags_cmd_out=f_putcmd|f_ResponseStatus|f_obey_p_check;
                }
#if 00
                else if (fam2_drive)
                {
                        drvcmd[0]=CMD2_CAPACITY;
                        response_count=8;
                        flags_cmd_out=f_putcmd;
                }
#endif
                else if (fam0_drive)
                {
                        drvcmd[0]=CMD0_CAPACITY;
                        response_count=5;
                        flags_cmd_out=f_putcmd|f_getsta|f_ResponseStatus|f_obey_p_check;
                }
                i=cmd_out();
                if (i>=0) break;
                msg(DBG_000,"cc_ReadCapacity: cmd_out: err %d\n", i);
                cc_ReadError();
        }
        if (j==0) return (i);
        if (fam1_drive) current_drive->CDsize_frm=msf2blk(make32(make16(0,infobuf[0]),make16(infobuf[1],infobuf[2])))+CD_MSF_OFFSET;
        else if (fam0_drive) current_drive->CDsize_frm=make32(make16(0,infobuf[0]),make16(infobuf[1],infobuf[2]));
#if 00
        else if (fam2_drive) current_drive->CDsize_frm=make32(make16(infobuf[0],infobuf[1]),make16(infobuf[2],infobuf[3]));
#endif
        current_drive->diskstate_flags |= cd_size_bit;
        msg(DBG_000,"cc_ReadCapacity: %d frames.\n", current_drive->CDsize_frm);
        return (0);
}
/*==========================================================================*/
static int cc_ReadTocDescr(void)
{
        int i;
        
        current_drive->diskstate_flags &= ~toc_bit;
        clr_cmdbuf();
        if (fam1_drive)
        {
                drvcmd[0]=CMD1_DISKINFO;
                response_count=6;
                flags_cmd_out=f_putcmd|f_ResponseStatus|f_obey_p_check;
        }
        else if (fam0LV_drive)
        {
                drvcmd[0]=CMD0_DISKINFO;
                response_count=6;
                if(famLV_drive)
                        flags_cmd_out=f_putcmd;
                else
                        flags_cmd_out=f_putcmd|f_getsta|f_ResponseStatus|f_obey_p_check;
        }
        else if (fam2_drive)
        {
                /* possibly longer timeout periods necessary */
                current_drive->f_multisession=0;
                drvcmd[0]=CMD2_DISKINFO;
                drvcmd[1]=0x02;
                drvcmd[2]=0xAB;
                drvcmd[3]=0xFF; /* session */
                response_count=8;
                flags_cmd_out=f_putcmd;
        }
        else if (famT_drive)
        {
                current_drive->f_multisession=0;
                response_count=12;
                drvcmd[0]=CMDT_DISKINFO;
                drvcmd[1]=0x02;
                drvcmd[6]=CDROM_LEADOUT;
                drvcmd[8]=response_count;
                drvcmd[9]=0x00;
        }
        i=cmd_out();
        if (i<0) return (i);
        if ((famT_drive)&&(i<response_count)) return (-100-i);
        if ((fam1_drive)||(fam2_drive)||(fam0LV_drive))
                current_drive->xa_byte=infobuf[0];
        if (fam2_drive)
        {
                current_drive->first_session=infobuf[1];
                current_drive->last_session=infobuf[2];
                current_drive->n_first_track=infobuf[3];
                current_drive->n_last_track=infobuf[4];
                if (current_drive->first_session!=current_drive->last_session)
                {
                        current_drive->f_multisession=1;
                        current_drive->lba_multi=msf2blk(make32(make16(0,infobuf[5]),make16(infobuf[6],infobuf[7])));
                }
#if 0
                if (current_drive->first_session!=current_drive->last_session)
                {
                        if (current_drive->last_session<=20)
                                zwanzig=current_drive->last_session+1;
                        else zwanzig=20;
                        for (count=current_drive->first_session;count<zwanzig;count++)
                        {
                                drvcmd[0]=CMD2_DISKINFO;
                                drvcmd[1]=0x02;
                                drvcmd[2]=0xAB;
                                drvcmd[3]=count;
                                response_count=8;
                                flags_cmd_out=f_putcmd;
                                i=cmd_out();
                                if (i<0) return (i);
                                current_drive->msf_multi_n[count]=make32(make16(0,infobuf[5]),make16(infobuf[6],infobuf[7]));
                        }
                        current_drive->diskstate_flags |= multisession_bit;
                }
#endif
                drvcmd[0]=CMD2_DISKINFO;
                drvcmd[1]=0x02;
                drvcmd[2]=0xAA;
                drvcmd[3]=0xFF;
                response_count=5;
                flags_cmd_out=f_putcmd;
                i=cmd_out();
                if (i<0) return (i);
                current_drive->size_msf=make32(make16(0,infobuf[2]),make16(infobuf[3],infobuf[4]));
                current_drive->size_blk=msf2blk(current_drive->size_msf);
                current_drive->CDsize_frm=current_drive->size_blk+1;
        }
        else if (famT_drive)
        {
                current_drive->size_msf=make32(make16(infobuf[8],infobuf[9]),make16(infobuf[10],infobuf[11]));
                current_drive->size_blk=msf2blk(current_drive->size_msf);
                current_drive->CDsize_frm=current_drive->size_blk+1;
                current_drive->n_first_track=infobuf[2];
                current_drive->n_last_track=infobuf[3];
        }
        else
        {
                current_drive->n_first_track=infobuf[1];
                current_drive->n_last_track=infobuf[2];
                current_drive->size_msf=make32(make16(0,infobuf[3]),make16(infobuf[4],infobuf[5]));
                current_drive->size_blk=msf2blk(current_drive->size_msf);
                if (famLV_drive) current_drive->CDsize_frm=current_drive->size_blk+1;
        }
        current_drive->diskstate_flags |= toc_bit;
        msg(DBG_TOC,"TocDesc: xa %02X firstt %02X lastt %02X size %08X firstses %02X lastsess %02X\n",
            current_drive->xa_byte,
            current_drive->n_first_track,
            current_drive->n_last_track,
            current_drive->size_msf,
            current_drive->first_session,
            current_drive->last_session);
        return (0);
}
/*==========================================================================*/
static int cc_ReadTocEntry(int num)
{
        int i;
        
        clr_cmdbuf();
        if (fam1_drive)
        {
                drvcmd[0]=CMD1_READTOC;
                drvcmd[2]=num;
                response_count=8;
                flags_cmd_out=f_putcmd|f_ResponseStatus|f_obey_p_check;
        }
        else if (fam2_drive)
        {
                /* possibly longer timeout periods necessary */
                drvcmd[0]=CMD2_DISKINFO;
                drvcmd[1]=0x02;
                drvcmd[2]=num;
                response_count=5;
                flags_cmd_out=f_putcmd;
        }
        else if (fam0LV_drive)
        {
                drvcmd[0]=CMD0_READTOC;
                drvcmd[1]=0x02;
                drvcmd[2]=num;
                response_count=8;
                if (famLV_drive)
                        flags_cmd_out=f_putcmd;
                else
                  flags_cmd_out=f_putcmd|f_getsta|f_ResponseStatus|f_obey_p_check;
        }
        else if (famT_drive)
        {
                response_count=12;
                drvcmd[0]=CMDT_DISKINFO;
                drvcmd[1]=0x02;
                drvcmd[6]=num;
                drvcmd[8]=response_count;
                drvcmd[9]=0x00;
        }
        i=cmd_out();
        if (i<0) return (i);
        if ((famT_drive)&&(i<response_count)) return (-100-i);
        if ((fam1_drive)||(fam0LV_drive))
        {
                current_drive->TocEnt_nixbyte=infobuf[0];
                i=1;
        }
        else if (fam2_drive) i=0;
        else if (famT_drive) i=5;
        current_drive->TocEnt_ctl_adr=swap_nibbles(infobuf[i++]);
        if ((fam1_drive)||(fam0L_drive))
        {
                current_drive->TocEnt_number=infobuf[i++];
                current_drive->TocEnt_format=infobuf[i];
        }
        else
          {
            current_drive->TocEnt_number=num;
            current_drive->TocEnt_format=0;
          }
        if (fam1_drive) i=4;
        else if (fam0LV_drive) i=5;
        else if (fam2_drive) i=2;
        else if (famT_drive) i=9;
        current_drive->TocEnt_address=make32(make16(0,infobuf[i]),
                                     make16(infobuf[i+1],infobuf[i+2]));
        for (i=0;i<response_count;i++)
                sprintf(&msgbuf[i*3], " %02X", infobuf[i]);
        msgbuf[i*3]=0;
        msg(DBG_ECS,"TocEntry:%s\n", msgbuf);
        msg(DBG_TOC,"TocEntry: %02X %02X %02X %02X %08X\n",
            current_drive->TocEnt_nixbyte, current_drive->TocEnt_ctl_adr,
            current_drive->TocEnt_number, current_drive->TocEnt_format,
            current_drive->TocEnt_address);
        return (0);
}
/*==========================================================================*/
static int cc_ReadPacket(void)
{
        int i;
        
        clr_cmdbuf();
        drvcmd[0]=CMD0_PACKET;
        drvcmd[1]=response_count;
        if(famL_drive) flags_cmd_out=f_putcmd;
        else if (fam01_drive)
                flags_cmd_out=f_putcmd|f_getsta|f_ResponseStatus|f_obey_p_check;
        else if (fam2_drive) return (-1); /* not implemented yet */
        else if (famT_drive)
        {
                return (-1);
        }
        i=cmd_out();
        return (i);
}
/*==========================================================================*/
static int convert_UPC(u_char *p)
{
        int i;
        
        p++;
        if (fam0L_drive) p[13]=0;
        for (i=0;i<7;i++)
        {
                if (fam1_drive) current_drive->UPC_buf[i]=swap_nibbles(*p++);
                else if (fam0L_drive)
                {
                        current_drive->UPC_buf[i]=((*p++)<<4)&0xFF;
                        current_drive->UPC_buf[i] |= *p++;
                }
                else if (famT_drive)
                {
                        return (-1);
                }
                else /* CD200 */
                {
                        return (-1);
                }
        }
        current_drive->UPC_buf[6] &= 0xF0;
        return (0);
}
/*==========================================================================*/
static int cc_ReadUPC(void)
{
        int i;
#if TEST_UPC
        int block, checksum;
#endif /* TEST_UPC */ 
        
        if (fam2_drive) return (0); /* not implemented yet */
        if (famT_drive) return (0); /* not implemented yet */
        if (famV_drive) return (0); /* not implemented yet */
#if 1
        if (fam0_drive) return (0); /* but it should work */
#endif
        
        current_drive->diskstate_flags &= ~upc_bit;
#if TEST_UPC
        for (block=CD_MSF_OFFSET+1;block<CD_MSF_OFFSET+200;block++)
        {
#endif /* TEST_UPC */ 
                clr_cmdbuf();
                if (fam1_drive)
                {
                        drvcmd[0]=CMD1_READ_UPC;
#if TEST_UPC
                        drvcmd[1]=(block>>16)&0xFF;
                        drvcmd[2]=(block>>8)&0xFF;
                        drvcmd[3]=block&0xFF;
#endif /* TEST_UPC */ 
                        response_count=8;
                        flags_cmd_out=f_putcmd|f_ResponseStatus|f_obey_p_check;
                }
                else if (fam0L_drive)
                {
                        drvcmd[0]=CMD0_READ_UPC;
#if TEST_UPC
                        drvcmd[2]=(block>>16)&0xFF;
                        drvcmd[3]=(block>>8)&0xFF;
                        drvcmd[4]=block&0xFF;
#endif /* TEST_UPC */ 
                        response_count=0;
                        flags_cmd_out=f_putcmd|f_lopsta|f_getsta|f_ResponseStatus|f_obey_p_check|f_bit1;
                }
                else if (fam2_drive)
                {
                        return (-1);
                }
                else if (famT_drive)
                {
                        return (-1);
                }
                i=cmd_out();
                if (i<0)
                {
                        msg(DBG_000,"cc_ReadUPC cmd_out: err %d\n", i);
                        return (i);
                }
                if (fam0L_drive)
                {
                        response_count=16;
                        if (famL_drive) flags_cmd_out=f_putcmd;
                        i=cc_ReadPacket();
                        if (i<0)
                        {
                                msg(DBG_000,"cc_ReadUPC ReadPacket: err %d\n", i);
                                return (i);
                        }
                }
#if TEST_UPC
                checksum=0;
#endif /* TEST_UPC */ 
                for (i=0;i<(fam1_drive?8:16);i++)
                {
#if TEST_UPC
                        checksum |= infobuf[i];
#endif /* TEST_UPC */ 
                        sprintf(&msgbuf[i*3], " %02X", infobuf[i]);
                }
                msgbuf[i*3]=0;
                msg(DBG_UPC,"UPC info:%s\n", msgbuf);
#if TEST_UPC
                if ((checksum&0x7F)!=0) break;
        }
#endif /* TEST_UPC */ 
        current_drive->UPC_ctl_adr=0;
        if (fam1_drive) i=0;
        else i=2;
        if ((infobuf[i]&0x80)!=0)
        {
                convert_UPC(&infobuf[i]);
                current_drive->UPC_ctl_adr = (current_drive->TocEnt_ctl_adr & 0xF0) | 0x02;
        }
        for (i=0;i<7;i++)
                sprintf(&msgbuf[i*3], " %02X", current_drive->UPC_buf[i]);
        sprintf(&msgbuf[i*3], " (%02X)", current_drive->UPC_ctl_adr);
        msgbuf[i*3+5]=0;
        msg(DBG_UPC,"UPC code:%s\n", msgbuf);
        current_drive->diskstate_flags |= upc_bit;
        return (0);
}

static int sbpcd_get_mcn(struct cdrom_device_info *cdi, struct cdrom_mcn *mcn)
{
        int i;
        unsigned char *mcnp = mcn->medium_catalog_number;
        unsigned char *resp;

        current_drive->diskstate_flags &= ~upc_bit;
        clr_cmdbuf();
        if (fam1_drive)
        {
                drvcmd[0]=CMD1_READ_UPC;
                response_count=8;
                flags_cmd_out=f_putcmd|f_ResponseStatus|f_obey_p_check;
        }
        else if (fam0L_drive)
        {
                drvcmd[0]=CMD0_READ_UPC;
                response_count=0;
                flags_cmd_out=f_putcmd|f_lopsta|f_getsta|f_ResponseStatus|f_obey_p_check|f_bit1;
        }
        else if (fam2_drive)
        {
                return (-1);
        }
        else if (famT_drive)
        {
                return (-1);
        }
        i=cmd_out();
        if (i<0)
        {
                msg(DBG_000,"cc_ReadUPC cmd_out: err %d\n", i);
                return (i);
        }
        if (fam0L_drive)
        {
                response_count=16;
                if (famL_drive) flags_cmd_out=f_putcmd;
                i=cc_ReadPacket();
                if (i<0)
                {
                        msg(DBG_000,"cc_ReadUPC ReadPacket: err %d\n", i);
                        return (i);
                }
        }
        current_drive->UPC_ctl_adr=0;
        if (fam1_drive) i=0;
        else i=2;

        resp = infobuf + i;
        if (*resp++ == 0x80) {
                /* packed bcd to single ASCII digits */
                *mcnp++ = (*resp >> 4)     + '0';
                *mcnp++ = (*resp++ & 0x0f) + '0';
                *mcnp++ = (*resp >> 4)     + '0';
                *mcnp++ = (*resp++ & 0x0f) + '0';
                *mcnp++ = (*resp >> 4)     + '0';
                *mcnp++ = (*resp++ & 0x0f) + '0';
                *mcnp++ = (*resp >> 4)     + '0';
                *mcnp++ = (*resp++ & 0x0f) + '0';
                *mcnp++ = (*resp >> 4)     + '0';
                *mcnp++ = (*resp++ & 0x0f) + '0';
                *mcnp++ = (*resp >> 4)     + '0';
                *mcnp++ = (*resp++ & 0x0f) + '0';
                *mcnp++ = (*resp >> 4)     + '0';
        }
        *mcnp = '\0';

        current_drive->diskstate_flags |= upc_bit;
        return (0);
}

/*==========================================================================*/
static int cc_CheckMultiSession(void)
{
        int i;
        
        if (fam2_drive) return (0);
        current_drive->f_multisession=0;
        current_drive->lba_multi=0;
        if (fam0_drive) return (0);
        clr_cmdbuf();
        if (fam1_drive)
        {
                drvcmd[0]=CMD1_MULTISESS;
                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)
                {
                        current_drive->f_multisession=1;
                        current_drive->lba_multi=msf2blk(make32(make16(0,infobuf[1]),
                                                        make16(infobuf[2],infobuf[3])));
                }
        }
        else if (famLV_drive)
        {
                drvcmd[0]=CMDL_MULTISESS;
                drvcmd[1]=3;
                drvcmd[2]=1;
                response_count=8;
                flags_cmd_out=f_putcmd;
                i=cmd_out();
                if (i<0) return (i);
                current_drive->lba_multi=msf2blk(make32(make16(0,infobuf[5]),
                                                make16(infobuf[6],infobuf[7])));
        }
        else if (famT_drive)
        {
                response_count=12;
                drvcmd[0]=CMDT_DISKINFO;
                drvcmd[1]=0x02;
                drvcmd[6]=0;
                drvcmd[8]=response_count;
                drvcmd[9]=0x40;
                i=cmd_out();
                if (i<0) return (i);
                if (i<response_count) return (-100-i);
                current_drive->first_session=infobuf[2];
                current_drive->last_session=infobuf[3];
                current_drive->track_of_last_session=infobuf[6];
                if (current_drive->first_session!=current_drive->last_session)
                {
                        current_drive->f_multisession=1;
                        current_drive->lba_multi=msf2blk(make32(make16(0,infobuf[9]),make16(infobuf[10],infobuf[11])));
                }
        }
        for (i=0;i<response_count;i++)
                sprintf(&msgbuf[i*3], " %02X", infobuf[i]);
        msgbuf[i*3]=0;
        msg(DBG_MUL,"MultiSession Info:%s (%d)\n", msgbuf, current_drive->lba_multi);
        if (current_drive->lba_multi>200)
        {
                current_drive->f_multisession=1;
                msg(DBG_MUL,"MultiSession base: %06X\n", current_drive->lba_multi);
        }
        return (0);
}
/*==========================================================================*/
#ifdef FUTURE
static int cc_SubChanInfo(int frame, int count, u_char *buffer)
        /* "frame" is a RED BOOK (msf-bin) address */
{
        int i;
        
        if (fam0LV_drive) return (-ENOSYS); /* drive firmware lacks it */
        if (famT_drive)
        {
                return (-1);
        }
#if 0
        if (current_drive->audio_state!=audio_playing) return (-ENODATA);
#endif
        clr_cmdbuf();
        drvcmd[0]=CMD1_SUBCHANINF;
        drvcmd[1]=(frame>>16)&0xFF;
        drvcmd[2]=(frame>>8)&0xFF;
        drvcmd[3]=frame&0xFF;
        drvcmd[5]=(count>>8)&0xFF;
        drvcmd[6]=count&0xFF;
        flags_cmd_out=f_putcmd|f_respo2|f_ResponseStatus|f_obey_p_check;
        cmd_type=READ_SC;
        current_drive->frame_size=CD_FRAMESIZE_SUB;
        i=cmd_out(); /* which buffer to use? */
        return (i);
}
#endif /* FUTURE */ 
/*==========================================================================*/
static void __init check_datarate(void)
{
        int i=0;
        
        msg(DBG_IOX,"check_datarate entered.\n");
        datarate=0;
#if TEST_STI
        for (i=0;i<=1000;i++) printk(".");
#endif
        /* set a timer to make (timed_out_delay!=0) after 1.1 seconds */
#if 1
        del_timer(&delay_timer);
#endif
        delay_timer.expires=jiffies+11*HZ/10;
        timed_out_delay=0;
        add_timer(&delay_timer);
#if 0
        msg(DBG_TIM,"delay timer started (11*HZ/10).\n");
#endif
        do
        {
                i=inb(CDi_status);
                datarate++;
#if 1
                if (datarate>0x6FFFFFFF) break;
#endif 
        }
        while (!timed_out_delay);
        del_timer(&delay_timer);
#if 0
        msg(DBG_TIM,"datarate: %04X\n", datarate);
#endif
        if (datarate<65536) datarate=65536;
        maxtim16=datarate*16;
        maxtim04=datarate*4;
        maxtim02=datarate*2;
        maxtim_8=datarate/32;
#if LONG_TIMING
        maxtim_data=datarate/100;
#else
        maxtim_data=datarate/300;
#endif /* LONG_TIMING */ 
#if 0
        msg(DBG_TIM,"maxtim_8 %d, maxtim_data %d.\n", maxtim_8, maxtim_data);
#endif
}
/*==========================================================================*/
#if 0
static int c2_ReadError(int fam)
{
        int i;
        
        clr_cmdbuf();
        response_count=9;
        clr_respo_buf(9);
        if (fam==1)
        {
                drvcmd[0]=CMD0_READ_ERR; /* same as CMD1_ and CMDL_ */
                i=do_cmd(f_putcmd|f_lopsta|f_getsta|f_ResponseStatus);
        }
        else if (fam==2)
        {
                drvcmd[0]=CMD2_READ_ERR;
                i=do_cmd(f_putcmd);
        }
        else return (-1);
        return (i);
}
#endif
/*==========================================================================*/
static void __init ask_mail(void)
{
        int i;
        
        msg(DBG_INF, "please mail the following lines to emoenke@gwdg.de\n");
        msg(DBG_INF, "(don't mail if you are not using the actual kernel):\n");
        msg(DBG_INF, "%s\n", VERSION);
        msg(DBG_INF, "address %03X, type %s, drive %s (ID %d)\n",
            CDo_command, type, current_drive->drive_model, current_drive->drv_id);
        for (i=0;i<12;i++)
                sprintf(&msgbuf[i*3], " %02X", infobuf[i]);
        msgbuf[i*3]=0;
        msg(DBG_INF,"infobuf =%s\n", msgbuf);
        for (i=0;i<12;i++)
                sprintf(&msgbuf[i*3], " %c ", infobuf[i]);
        msgbuf[i*3]=0;
        msg(DBG_INF,"infobuf =%s\n", msgbuf);
}
/*==========================================================================*/
static int __init check_version(void)
{
        int i, j, l;
        int teac_possible=0;
        
        msg(DBG_INI,"check_version: id=%d, d=%d.\n", current_drive->drv_id, current_drive - D_S);
        current_drive->drv_type=0;

        /* check for CR-52x, CR-56x, LCS-7260 and ECS-AT */
        /* clear any pending error state */
        clr_cmdbuf();
        drvcmd[0]=CMD0_READ_ERR; /* same as CMD1_ and CMDL_ */
        response_count=9;
        flags_cmd_out=f_putcmd;
        i=cmd_out();
        if (i<0) msg(DBG_INI,"CMD0_READ_ERR returns %d (ok anyway).\n",i);
        /* read drive version */
        clr_cmdbuf();
        for (i=0;i<12;i++) infobuf[i]=0;
        drvcmd[0]=CMD0_READ_VER; /* same as CMD1_ and CMDL_ */
        response_count=12; /* fam1: only 11 */
        flags_cmd_out=f_putcmd;
        i=cmd_out();
        if (i<-1) msg(DBG_INI,"CMD0_READ_VER returns %d\n",i);
        if (i==-11) teac_possible++;
        j=0;
        for (i=0;i<12;i++) j+=infobuf[i];
        if (j)
        {
                for (i=0;i<12;i++)
                        sprintf(&msgbuf[i*3], " %02X", infobuf[i]);
                msgbuf[i*3]=0;
                msg(DBG_ECS,"infobuf =%s\n", msgbuf);
                for (i=0;i<12;i++)
                        sprintf(&msgbuf[i*3], " %c ", infobuf[i]);
                msgbuf[i*3]=0;
                msg(DBG_ECS,"infobuf =%s\n", msgbuf);
        }
        for (i=0;i<4;i++) if (infobuf[i]!=family1[i]) break;
        if (i==4)
        {
                current_drive->drive_model[0]='C';
                current_drive->drive_model[1]='R';
                current_drive->drive_model[2]='-';
                current_drive->drive_model[3]='5';
                current_drive->drive_model[4]=infobuf[i++];
                current_drive->drive_model[5]=infobuf[i++];
                current_drive->drive_model[6]=0;
                current_drive->drv_type=drv_fam1;
        }
        if (!current_drive->drv_type)
        {
                for (i=0;i<8;i++) if (infobuf[i]!=family0[i]) break;
                if (i==8)
                {
                        current_drive->drive_model[0]='C';
                        current_drive->drive_model[1]='R';
                        current_drive->drive_model[2]='-';
                        current_drive->drive_model[3]='5';
                        current_drive->drive_model[4]='2';
                        current_drive->drive_model[5]='x';
                        current_drive->drive_model[6]=0;
                        current_drive->drv_type=drv_fam0;
                }
        }
        if (!current_drive->drv_type)
        {
                for (i=0;i<8;i++) if (infobuf[i]!=familyL[i]) break;
                if (i==8)
                {
                        for (j=0;j<8;j++)
                                current_drive->drive_model[j]=infobuf[j];
                        current_drive->drive_model[8]=0;
                        current_drive->drv_type=drv_famL;
                }
        }
        if (!current_drive->drv_type)
        {
                for (i=0;i<6;i++) if (infobuf[i]!=familyV[i]) break;
                if (i==6)
                {
                        for (j=0;j<6;j++)
                                current_drive->drive_model[j]=infobuf[j];
                        current_drive->drive_model[6]=0;
                        current_drive->drv_type=drv_famV;
                        i+=2; /* 2 blanks before version */
                }
        }
        if (!current_drive->drv_type)
        {
                /* check for CD200 */
                clr_cmdbuf();
                drvcmd[0]=CMD2_READ_ERR;
                response_count=9;
                flags_cmd_out=f_putcmd;
                i=cmd_out();
                if (i<0) msg(DBG_INI,"CMD2_READERR returns %d (ok anyway).\n",i);
                if (i<0) msg(DBG_000,"CMD2_READERR returns %d (ok anyway).\n",i);
                /* read drive version */
                clr_cmdbuf();
                for (i=0;i<12;i++) infobuf[i]=0;
                if (sbpro_type==1) OUT(CDo_sel_i_d,0);
#if 0
                OUT(CDo_reset,0);
                sbp_sleep(6*HZ);
                OUT(CDo_enable,current_drive->drv_sel);
#endif
                drvcmd[0]=CMD2_READ_VER;
                response_count=12;
                flags_cmd_out=f_putcmd;
                i=cmd_out();
                if (i<0) msg(DBG_INI,"CMD2_READ_VER returns %d\n",i);
                if (i==-7) teac_possible++;
                j=0;
                for (i=0;i<12;i++) j+=infobuf[i];
                if (j)
                {
                        for (i=0;i<12;i++)
                                sprintf(&msgbuf[i*3], " %02X", infobuf[i]);
                        msgbuf[i*3]=0;
                        msg(DBG_IDX,"infobuf =%s\n", msgbuf);
                        for (i=0;i<12;i++)
                                sprintf(&msgbuf[i*3], " %c ", infobuf[i]);
                        msgbuf[i*3]=0;
                        msg(DBG_IDX,"infobuf =%s\n", msgbuf);
                }
                if (i>=0)
                {
                        for (i=0;i<5;i++) if (infobuf[i]!=family2[i]) break;
                        if (i==5)
                        {
                                current_drive->drive_model[0]='C';
                                current_drive->drive_model[1]='D';
                                current_drive->drive_model[2]='2';
                                current_drive->drive_model[3]='0';
                                current_drive->drive_model[4]='0';
                                current_drive->drive_model[5]=infobuf[i++];
                                current_drive->drive_model[6]=infobuf[i++];
                                current_drive->drive_model[7]=0;
                                current_drive->drv_type=drv_fam2;
                        }
                }
        }
        if (!current_drive->drv_type)
        {
                /* check for TEAC CD-55A */
                msg(DBG_TEA,"teac_possible: %d\n",teac_possible);
                for (j=1;j<=((current_drive->drv_id==0)?3:1);j++)
                {
                        for (l=1;l<=((current_drive->drv_id==0)?10:1);l++)
                        {
                                msg(DBG_TEA,"TEAC reset #%d-%d.\n", j, l);
                                if (sbpro_type==1) OUT(CDo_reset,0);
                                else
                                {
                                        OUT(CDo_enable,current_drive->drv_sel);
                                        OUT(CDo_sel_i_d,0);
                                        OUT(CDo_command,CMDT_RESET);
                                        for (i=0;i<9;i++) OUT(CDo_command,0);
                                }
                                sbp_sleep(5*HZ/10);
                                OUT(CDo_enable,current_drive->drv_sel);
                                OUT(CDo_sel_i_d,0);
                                i=inb(CDi_status);
                                msg(DBG_TEA,"TEAC CDi_status: %02X.\n",i);
#if 0
                                if (i&s_not_result_ready) continue; /* drive not present or ready */
#endif
                                i=inb(CDi_info);
                                msg(DBG_TEA,"TEAC CDi_info: %02X.\n",i);
                                if (i==0x55) break; /* drive found */
                        }
                        if (i==0x55) break; /* drive found */
                }
                if (i==0x55) /* drive found */
                {
                        msg(DBG_TEA,"TEAC drive found.\n");
                        clr_cmdbuf();
                        flags_cmd_out=f_putcmd;
                        response_count=12;
                        drvcmd[0]=CMDT_READ_VER;
                        drvcmd[4]=response_count;
                        for (i=0;i<12;i++) infobuf[i]=0;
                        i=cmd_out_T();
                        if (i!=0) msg(DBG_TEA,"cmd_out_T(CMDT_READ_VER) returns %d.\n",i);
                        for (i=1;i<6;i++) if (infobuf[i]!=familyT[i-1]) break;
                        if (i==6)
                        {
                                current_drive->drive_model[0]='C';
                                current_drive->drive_model[1]='D';
                                current_drive->drive_model[2]='-';
                                current_drive->drive_model[3]='5';
                                current_drive->drive_model[4]='5';
                                current_drive->drive_model[5]=0;
                                current_drive->drv_type=drv_famT;
                        }
                }
        }
        if (!current_drive->drv_type)
        {
                msg(DBG_TEA,"no drive found at address %03X under ID %d.\n",CDo_command,current_drive->drv_id);
                return (-522);
        }
        for (j=0;j<4;j++) current_drive->firmware_version[j]=infobuf[i+j];
        if (famL_drive)
        {
          u_char lcs_firm_e1[]="A E1";
          u_char lcs_firm_f4[]="A4F4";
                
          for (j=0;j<4;j++)
            if (current_drive->firmware_version[j]!=lcs_firm_e1[j]) break;
          if (j==4) current_drive->drv_type=drv_e1;
          
          for (j=0;j<4;j++)
            if (current_drive->firmware_version[j]!=lcs_firm_f4[j]) break;
          if (j==4) current_drive->drv_type=drv_f4;

          if (current_drive->drv_type==drv_famL) ask_mail();
        }
        else if (famT_drive)
        {
                j=infobuf[4]; /* one-byte version??? - here: 0x15 */
                if (j=='5')
                {
                        current_drive->firmware_version[0]=infobuf[7];
                        current_drive->firmware_version[1]=infobuf[8];
                        current_drive->firmware_version[2]=infobuf[10];
                        current_drive->firmware_version[3]=infobuf[11];
                }
                else
                {
                        if (j!=0x15) ask_mail();
                        current_drive->firmware_version[0]='0';
                        current_drive->firmware_version[1]='.';
                        current_drive->firmware_version[2]='0'+(j>>4);
                        current_drive->firmware_version[3]='0'+(j&0x0f);
                }
        }
        else /* CR-52x, CR-56x, CD200, ECS-AT */
        {
                j = (current_drive->firmware_version[0] & 0x0F) * 100 +
                        (current_drive->firmware_version[2] & 0x0F) *10 +
                                (current_drive->firmware_version[3] & 0x0F);
                if (fam0_drive)
                {
                        if (j<200) current_drive->drv_type=drv_199;
                        else if (j<201) current_drive->drv_type=drv_200;
                        else if (j<210) current_drive->drv_type=drv_201;
                        else if (j<211) current_drive->drv_type=drv_210;
                        else if (j<300) current_drive->drv_type=drv_211;
                        else if (j>=300) current_drive->drv_type=drv_300;
                }
                else if (fam1_drive)
                {
                        if (j<100) current_drive->drv_type=drv_099;
                        else
                        {
                                current_drive->drv_type=drv_100;
                                if ((j!=500)&&(j!=102)) ask_mail();
                        }
                }
                else if (fam2_drive)
                {
                        if (current_drive->drive_model[5]=='F')
                        {
                                if ((j!=1)&&(j!=35)&&(j!=200)&&(j!=210))
                                  ask_mail(); /* unknown version at time */
                        }
                        else
                        {
                                msg(DBG_INF,"this CD200 drive is not fully supported yet - only audio will work.\n");
                                if ((j!=101)&&(j!=35))
                                  ask_mail(); /* unknown version at time */
                        }
                }
                else if (famV_drive)
                  {
                    if ((j==100)||(j==150)) current_drive->drv_type=drv_at;
                    ask_mail(); /* hopefully we get some feedback by this */
                  }
        }
        msg(DBG_LCS,"drive type %02X\n",current_drive->drv_type);
        msg(DBG_INI,"check_version done.\n");
        return (0);
}
/*==========================================================================*/
static void switch_drive(struct sbpcd_drive *p)
{
        current_drive = p;
        OUT(CDo_enable,current_drive->drv_sel);
        msg(DBG_DID,"drive %d (ID=%d) activated.\n",
                current_drive - D_S, current_drive->drv_id);
        return;
}
/*==========================================================================*/
#ifdef PATH_CHECK
/*
 * probe for the presence of an interface card
 */
static int __init check_card(int port)
{
#undef N_RESPO
#define N_RESPO 20
        int i, j, k;
        u_char response[N_RESPO];
        u_char save_port0;
        u_char save_port3;
        
        msg(DBG_INI,"check_card entered.\n");
        save_port0=inb(port+0);
        save_port3=inb(port+3);
        
        for (j=0;j<NR_SBPCD;j++)
        {
                OUT(port+3,j) ; /* enable drive #j */
                OUT(port+0,CMD0_PATH_CHECK);
                for (i=10;i>0;i--) OUT(port+0,0);
                for (k=0;k<N_RESPO;k++) response[k]=0;
                for (k=0;k<N_RESPO;k++)
                {
                        for (i=10000;i>0;i--)
                        {
                                if (inb(port+1)&s_not_result_ready) continue;
                                response[k]=inb(port+0);
                                break;
                        }
                }
                for (i=0;i<N_RESPO;i++)
                        sprintf(&msgbuf[i*3], " %02X", response[i]);
                msgbuf[i*3]=0;
                msg(DBG_TEA,"path check 00 (%d): %s\n", j, msgbuf);
                OUT(port+0,CMD0_PATH_CHECK);
                for (i=10;i>0;i--) OUT(port+0,0);
                for (k=0;k<N_RESPO;k++) response[k]=0xFF;
                for (k=0;k<N_RESPO;k++)
                {
                        for (i=10000;i>0;i--)
                        {
                                if (inb(port+1)&s_not_result_ready) continue;
                                response[k]=inb(port+0);
                                break;
                        }
                }
                for (i=0;i<N_RESPO;i++)
                        sprintf(&msgbuf[i*3], " %02X", response[i]);
                msgbuf[i*3]=0;
                msg(DBG_TEA,"path check 00 (%d): %s\n", j, msgbuf);

                if (response[0]==0xAA)
                        if (response[1]==0x55)
                                return (0);
        }
        for (j=0;j<NR_SBPCD;j++)
        {
                OUT(port+3,j) ; /* enable drive #j */
                OUT(port+0,CMD2_READ_VER);
                for (i=10;i>0;i--) OUT(port+0,0);
                for (k=0;k<N_RESPO;k++) response[k]=0;
                for (k=0;k<N_RESPO;k++)
                {
                        for (i=1000000;i>0;i--)
                        {
                                if (inb(port+1)&s_not_result_ready) continue;
                                response[k]=inb(port+0);
                                break;
                        }
                }
                for (i=0;i<N_RESPO;i++)
                        sprintf(&msgbuf[i*3], " %02X", response[i]);
                msgbuf[i*3]=0;
                msg(DBG_TEA,"path check 12 (%d): %s\n", j, msgbuf);

                OUT(port+0,CMD2_READ_VER);
                for (i=10;i>0;i--) OUT(port+0,0);
                for (k=0;k<N_RESPO;k++) response[k]=0xFF;
                for (k=0;k<N_RESPO;k++)
                {
                        for (i=1000000;i>0;i--)
                        {
                                if (inb(port+1)&s_not_result_ready) continue;
                                response[k]=inb(port+0);
                                break;
                        }
                }
                for (i=0;i<N_RESPO;i++)
                        sprintf(&msgbuf[i*3], " %02X", response[i]);
                msgbuf[i*3]=0;
                msg(DBG_TEA,"path check 12 (%d): %s\n", j, msgbuf);

                if (response[0]==0xAA)
                        if (response[1]==0x55)
                                return (0);
        }
        OUT(port+0,save_port0);
        OUT(port+3,save_port3);
        return (0); /* in any case - no real "function" at time */
}
#endif /* PATH_CHECK */ 
/*==========================================================================*/
/*==========================================================================*/
/*
 * probe for the presence of drives on the selected controller
 */
static int __init check_drives(void)
{
        int i, j;
        
        msg(DBG_INI,"check_drives entered.\n");
        ndrives=0;
        for (j=0;j<max_drives;j++)
        {
                struct sbpcd_drive *p = D_S + ndrives;
                p->drv_id=j;
                if (sbpro_type==1) p->drv_sel=(j&0x01)<<1|(j&0x02)>>1;
                else p->drv_sel=j;
                switch_drive(p);
                msg(DBG_INI,"check_drives: drive %d (ID=%d) activated.\n",ndrives,j);
                msg(DBG_000,"check_drives: drive %d (ID=%d) activated.\n",ndrives,j);
                i=check_version();
                if (i<0) msg(DBG_INI,"check_version returns %d.\n",i);
                else
                {
                        current_drive->drv_options=drv_pattern[j];
                        if (fam0L_drive) current_drive->drv_options&=~(speed_auto|speed_300|speed_150);
                        msg(DBG_INF, "Drive %d (ID=%d): %.9s (%.4s) at 0x%03X (type %d)\n",
                            current_drive - D_S,
                            current_drive->drv_id,
                            current_drive->drive_model,
                            current_drive->firmware_version,
                            CDo_command,
                            sbpro_type);
                        ndrives++;
                }
        }
        for (j=ndrives;j<NR_SBPCD;j++) D_S[j].drv_id=-1;
        if (ndrives==0) return (-1);
        return (0);
}
/*==========================================================================*/
#ifdef 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);
        }
}
/*==========================================================================*/
/* 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 (fam1_drive) if (func2==tell_SubChanInfo) return (-1);
        if (func2==tell_UPC) return (-1);
#else
        return (0);
#endif
}
/*==========================================================================*/
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 (fam1_drive)
        {
                if (func2==EjectDisk) return (-1);
                if (func2==CloseTray) return (-1);
        }
#else
        return (0);
#endif
}
/*==========================================================================*/
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 (fam0L_drive) if (func2==tell_SubChanInfo) return (0);
                return (-1);
        }
        if (func1==ioctl_o)
        {
                if (func2==DriveReset) return (0);
                if (fam0L_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
}
/*==========================================================================*/
static int seek_pos_audio_end(void)
{
        int i;

        i=msf2blk(current_drive->pos_audio_end)-1;
        if (i<0) return (-1);
        i=cc_Seek(i,0);
        return (i);
}
#endif /* FUTURE */ 
/*==========================================================================*/
static int ReadToC(void)
{
        int i, j;
        current_drive->diskstate_flags &= ~toc_bit;
        current_drive->ored_ctl_adr=0;
        /* special handling of CD-I HE */
        if ((current_drive->n_first_track == 2 && current_drive->n_last_track == 2) ||
             current_drive->xa_byte == 0x10)
        {
                current_drive->TocBuffer[1].nixbyte=0;
                current_drive->TocBuffer[1].ctl_adr=0x40;
                current_drive->TocBuffer[1].number=1;
                current_drive->TocBuffer[1].format=0;
                current_drive->TocBuffer[1].address=blk2msf(0);
                current_drive->ored_ctl_adr |= 0x40;
                current_drive->n_first_track = 1;
                current_drive->n_last_track = 1;
                current_drive->xa_byte = 0x10;
                j = 2;
        } else
        for (j=current_drive->n_first_track;j<=current_drive->n_last_track;j++)
        {
                i=cc_ReadTocEntry(j);
                if (i<0)
                {
                        msg(DBG_INF,"cc_ReadTocEntry(%d) returns %d.\n",j,i);
                        return (i);
                }
                current_drive->TocBuffer[j].nixbyte=current_drive->TocEnt_nixbyte;
                current_drive->TocBuffer[j].ctl_adr=current_drive->TocEnt_ctl_adr;
                current_drive->TocBuffer[j].number=current_drive->TocEnt_number;
                current_drive->TocBuffer[j].format=current_drive->TocEnt_format;
                current_drive->TocBuffer[j].address=current_drive->TocEnt_address;
                current_drive->ored_ctl_adr |= current_drive->TocEnt_ctl_adr;
        }
        /* fake entry for LeadOut Track */
        current_drive->TocBuffer[j].nixbyte=0;
        current_drive->TocBuffer[j].ctl_adr=0;
        current_drive->TocBuffer[j].number=CDROM_LEADOUT;
        current_drive->TocBuffer[j].format=0;
        current_drive->TocBuffer[j].address=current_drive->size_msf;
        
        current_drive->diskstate_flags |= toc_bit;
        return (0);
}
/*==========================================================================*/
static int DiskInfo(void)
{
        int i, j;
        
        current_drive->mode=READ_M1;
        
#undef LOOP_COUNT
#define LOOP_COUNT 10 /* needed for some "old" drives */
        
        msg(DBG_000,"DiskInfo entered.\n");
        for (j=1;j<LOOP_COUNT;j++)
        {
#if 0
                i=SetSpeed();
                if (i<0)
                {
                        msg(DBG_INF,"DiskInfo: SetSpeed returns %d\n", i);
                        continue;
                }
                i=cc_ModeSense();
                if (i<0)
                {
                        msg(DBG_INF,"DiskInfo: cc_ModeSense returns %d\n", i);
                        continue;
                }
#endif
                i=cc_ReadCapacity();
                if (i>=0) break;
                msg(DBG_INF,"DiskInfo: ReadCapacity #%d returns %d\n", j, i);
#if 0
                i=cc_DriveReset();
#endif
                if (!fam0_drive && j == 2) break;
        }
        if (j==LOOP_COUNT) return (-33); /* give up */
        
        i=cc_ReadTocDescr();
        if (i<0)
        {
                msg(DBG_INF,"DiskInfo: ReadTocDescr returns %d\n", i);
                return (i);
        }
        i=ReadToC();
        if (i<0)
        {
                msg(DBG_INF,"DiskInfo: ReadToC returns %d\n", i);
                return (i);
        }
        i=cc_CheckMultiSession();
        if (i<0)
        {
                msg(DBG_INF,"DiskInfo: cc_CheckMultiSession returns %d\n", i);
                return (i);
        }
        if (current_drive->f_multisession) current_drive->sbp_bufsiz=1;  /* possibly a weird PhotoCD */
        else current_drive->sbp_bufsiz=buffers;
        i=cc_ReadTocEntry(current_drive->n_first_track);
        if (i<0)
        {
                msg(DBG_INF,"DiskInfo: cc_ReadTocEntry(1) returns %d\n", i);
                return (i);
        }
        i=cc_ReadUPC();
        if (i<0) msg(DBG_INF,"DiskInfo: cc_ReadUPC returns %d\n", i);
        if ((fam0L_drive) && (current_drive->xa_byte==0x20 || current_drive->xa_byte == 0x10))
        {
                /* XA disk with old drive */
                cc_ModeSelect(CD_FRAMESIZE_RAW1);
                cc_ModeSense();
        }
        if (famT_drive) cc_prep_mode_T();
        msg(DBG_000,"DiskInfo done.\n");
        return (0);
}

static int sbpcd_drive_status(struct cdrom_device_info *cdi, int slot_nr)
{
        struct sbpcd_drive *p = cdi->handle;
        int st;

        if (CDSL_CURRENT != slot_nr) {
                 /* we have no changer support */
                 return -EINVAL;
        }

        cc_ReadStatus();
        st=ResponseStatus();
        if (st<0)
        {
                msg(DBG_INF,"sbpcd_drive_status: timeout.\n");
                return (0);
        }
        msg(DBG_000,"Drive Status: door_locked =%d.\n", st_door_locked);
        msg(DBG_000,"Drive Status: door_closed =%d.\n", st_door_closed);
        msg(DBG_000,"Drive Status: caddy_in =%d.\n", st_caddy_in);
        msg(DBG_000,"Drive Status: disk_ok =%d.\n", st_diskok);
        msg(DBG_000,"Drive Status: spinning =%d.\n", st_spinning);
        msg(DBG_000,"Drive Status: busy =%d.\n", st_busy);

#if 0
  if (!(p->status_bits & p_door_closed)) return CDS_TRAY_OPEN;
  if (p->status_bits & p_disk_ok) return CDS_DISC_OK;
  if (p->status_bits & p_disk_in) return CDS_DRIVE_NOT_READY;

  return CDS_NO_DISC;
#else
  if (p->status_bits & p_spinning) return CDS_DISC_OK;
/*  return CDS_TRAY_OPEN; */
  return CDS_NO_DISC;
  
#endif

}


/*==========================================================================*/
#ifdef FUTURE
/*
 *  called always if driver gets entered
 *  returns 0 or ERROR2 or ERROR15
 */
static int prepare(u_char func, u_char subfunc)
{
        int i;
        
        if (fam0L_drive)
        {
                i=inb(CDi_status);
                if (i&s_attention) GetStatus();
        }
        else if (fam1_drive) GetStatus();
        else if (fam2_drive) GetStatus();
        else if (famT_drive) GetStatus();
        if (current_drive->CD_changed==0xFF)
        {
                current_drive->diskstate_flags=0;
                current_drive->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)
                        {
                                current_drive->CD_changed=1;
                                return (-15);
                        }
                }
        }
        else
        {
                if (!st_diskok)
                {
                        current_drive->diskstate_flags=0;
                        current_drive->audio_state=0;
                        i=check_allowed1(func,subfunc);
                        if (i<0) return (-2);
                }
                else
                { 
                        if (st_busy)
                        {
                                if (current_drive->audio_state!=audio_pausing)
                                {
                                        i=check_allowed2(func,subfunc);
                                        if (i<0) return (-2);
                                }
                        }
                        else
                        {
                                if (current_drive->audio_state==audio_playing) seek_pos_audio_end();
                                current_drive->audio_state=0;
                        }
                        if (!frame_size_valid)
                        {
                                i=DiskInfo();
                                if (i<0)
                                {
                                        current_drive->diskstate_flags=0;
                                        current_drive->audio_state=0;
                                        i=check_allowed1(func,subfunc);
                                        if (i<0) return (-2);
                                }
                        }
                }
    }
        return (0);
}
#endif /* FUTURE */ 
/*==========================================================================*/
/*==========================================================================*/
/*
 * Check the results of the "get status" command.
 */
static int sbp_status(void)
{
        int st;
        
        st=ResponseStatus();
        if (st<0)
        {
                msg(DBG_INF,"sbp_status: timeout.\n");
                return (0);
        }
        
        if (!st_spinning) msg(DBG_SPI,"motor got off - ignoring.\n");
        
        if (st_check) 
        {
                msg(DBG_INF,"st_check detected - retrying.\n");
                return (0);
        }
        if (!st_door_closed)
        {
                msg(DBG_INF,"door is open - retrying.\n");
                return (0);
        }
        if (!st_caddy_in)
        {
                msg(DBG_INF,"disk removed - retrying.\n");
                return (0);
        }
        if (!st_diskok) 
        {
                msg(DBG_INF,"!st_diskok detected - retrying.\n");
                return (0);
        }
        if (st_busy) 
        {
                msg(DBG_INF,"st_busy detected - retrying.\n");
                return (0);
        }
        return (1);
}
/*==========================================================================*/
                
static int sbpcd_get_last_session(struct cdrom_device_info *cdi, struct cdrom_multisession *ms_infp)
{
        struct sbpcd_drive *p = cdi->handle;
        ms_infp->addr_format = CDROM_LBA;
        ms_infp->addr.lba    = p->lba_multi;
        if (p->f_multisession)
                ms_infp->xa_flag=1; /* valid redirection address */
        else
                ms_infp->xa_flag=0; /* invalid redirection address */

        return  0;
}

static int sbpcd_audio_ioctl(struct cdrom_device_info *cdi, u_int cmd,
                       void * arg)
{
        struct sbpcd_drive *p = cdi->handle;
        int i, st, j;
        
        msg(DBG_IO2,"ioctl(%s, 0x%08lX, 0x%08p)\n", cdi->name, cmd, arg);
        if (p->drv_id==-1) {
                msg(DBG_INF, "ioctl: bad device: %s\n", cdi->name);
                return (-ENXIO);             /* no such drive */
        }
        down(&ioctl_read_sem);
        if (p != current_drive)
                switch_drive(p);
        
        msg(DBG_IO2,"ioctl: device %s, request %04X\n",cdi->name,cmd);
        switch (cmd)            /* Sun-compatible */
        {
                
        case CDROMPAUSE:     /* Pause the drive */
                msg(DBG_IOC,"ioctl: CDROMPAUSE entered.\n");
                /* pause the drive unit when it is currently in PLAY mode,         */
                /* or reset the starting and ending locations when in PAUSED mode. */
                /* If applicable, at the next stopping point it reaches            */
                /* the drive will discontinue playing.                             */
                switch (current_drive->audio_state)
                {
                case audio_playing:
                        if (famL_drive) i=cc_ReadSubQ();
                        else i=cc_Pause_Resume(1);
                        if (i<0) RETURN_UP(-EIO);
                        if (famL_drive) i=cc_Pause_Resume(1);
                        else i=cc_ReadSubQ();
                        if (i<0) RETURN_UP(-EIO);
                        current_drive->pos_audio_start=current_drive->SubQ_run_tot;
                        current_drive->audio_state=audio_pausing;
                        RETURN_UP(0);
                case audio_pausing:
                        i=cc_Seek(current_drive->pos_audio_start,1);
                        if (i<0) RETURN_UP(-EIO);
                        RETURN_UP(0);
                default:
                        RETURN_UP(-EINVAL);
                }

        case CDROMRESUME: /* resume paused audio play */
                msg(DBG_IOC,"ioctl: CDROMRESUME entered.\n");
                /* resume playing audio tracks when a previous PLAY AUDIO call has  */
                /* been paused with a PAUSE command.                                */
                /* It will resume playing from the location saved in SubQ_run_tot.  */
                if (current_drive->audio_state!=audio_pausing) RETURN_UP(-EINVAL);
                if (famL_drive)
                        i=cc_PlayAudio(current_drive->pos_audio_start,
                                       current_drive->pos_audio_end);
                else i=cc_Pause_Resume(3);
                if (i<0) RETURN_UP(-EIO);
                current_drive->audio_state=audio_playing;
                RETURN_UP(0);

        case CDROMPLAYMSF:
                msg(DBG_IOC,"ioctl: CDROMPLAYMSF entered.\n");
#ifdef SAFE_MIXED
                if (current_drive->has_data>1) RETURN_UP(-EBUSY);
#endif /* SAFE_MIXED */
                if (current_drive->audio_state==audio_playing)
                {
                        i=cc_Pause_Resume(1);
                        if (i<0) RETURN_UP(-EIO);
                        i=cc_ReadSubQ();
                        if (i<0) RETURN_UP(-EIO);
                        current_drive->pos_audio_start=current_drive->SubQ_run_tot;
                        i=cc_Seek(current_drive->pos_audio_start,1);
                }
                memcpy(&msf, (void *) arg, sizeof(struct cdrom_msf));
                /* values come as msf-bin */
                current_drive->pos_audio_start = (msf.cdmsf_min0<<16) |
                        (msf.cdmsf_sec0<<8) |
                                msf.cdmsf_frame0;
                current_drive->pos_audio_end = (msf.cdmsf_min1<<16) |
                        (msf.cdmsf_sec1<<8) |
                                msf.cdmsf_frame1;
                msg(DBG_IOX,"ioctl: CDROMPLAYMSF %08X %08X\n",
                    current_drive->pos_audio_start,current_drive->pos_audio_end);
                i=cc_PlayAudio(current_drive->pos_audio_start,current_drive->pos_audio_end);
                if (i<0)
                {
                        msg(DBG_INF,"ioctl: cc_PlayAudio returns %d\n",i);
                        DriveReset();
                        current_drive->audio_state=0;
                        RETURN_UP(-EIO);
                }
                current_drive->audio_state=audio_playing;
                RETURN_UP(0);
                
        case CDROMPLAYTRKIND: /* Play a track.  This currently ignores index. */
                msg(DBG_IOC,"ioctl: CDROMPLAYTRKIND entered.\n");
#ifdef SAFE_MIXED
                if (current_drive->has_data>1) RETURN_UP(-EBUSY);
#endif /* SAFE_MIXED */
                if (current_drive->audio_state==audio_playing)
                {
                        msg(DBG_IOX,"CDROMPLAYTRKIND: already audio_playing.\n");
#if 1
                        RETURN_UP(0); /* just let us play on */
#else
                        RETURN_UP(-EINVAL); /* play on, but say "error" */
#endif
                }
                memcpy(&ti,(void *) arg,sizeof(struct cdrom_ti));
                msg(DBG_IOX,"ioctl: trk0: %d, ind0: %d, trk1:%d, ind1:%d\n",
                    ti.cdti_trk0,ti.cdti_ind0,ti.cdti_trk1,ti.cdti_ind1);
                if (ti.cdti_trk0<current_drive->n_first_track) RETURN_UP(-EINVAL);
                if (ti.cdti_trk0>current_drive->n_last_track) RETURN_UP(-EINVAL);
                if (ti.cdti_trk1<ti.cdti_trk0) ti.cdti_trk1=ti.cdti_trk0;
                if (ti.cdti_trk1>current_drive->n_last_track) ti.cdti_trk1=current_drive->n_last_track;
                current_drive->pos_audio_start=current_drive->TocBuffer[ti.cdti_trk0].address;
                current_drive->pos_audio_end=current_drive->TocBuffer[ti.cdti_trk1+1].address;
                i=cc_PlayAudio(current_drive->pos_audio_start,current_drive->pos_audio_end);
                if (i<0)
                {
                        msg(DBG_INF,"ioctl: cc_PlayAudio returns %d\n",i);
                        DriveReset();
                        current_drive->audio_state=0;
                        RETURN_UP(-EIO);
                }
                current_drive->audio_state=audio_playing;
                RETURN_UP(0);
                
        case CDROMREADTOCHDR:        /* Read the table of contents header */
                msg(DBG_IOC,"ioctl: CDROMREADTOCHDR entered.\n");
                tochdr.cdth_trk0=current_drive->n_first_track;
                tochdr.cdth_trk1=current_drive->n_last_track;
                memcpy((void *) arg, &tochdr, sizeof(struct cdrom_tochdr));
                RETURN_UP(0);
                
        case CDROMREADTOCENTRY:      /* Read an entry in the table of contents */
                msg(DBG_IOC,"ioctl: CDROMREADTOCENTRY entered.\n");
                memcpy(&tocentry, (void *) arg, sizeof(struct cdrom_tocentry));
                i=tocentry.cdte_track;
                if (i==CDROM_LEADOUT) i=current_drive->n_last_track+1;
                else if (i<current_drive->n_first_track||i>current_drive->n_last_track)
                  RETURN_UP(-EINVAL);
                tocentry.cdte_adr=current_drive->TocBuffer[i].ctl_adr&0x0F;
                tocentry.cdte_ctrl=(current_drive->TocBuffer[i].ctl_adr>>4)&0x0F;
                tocentry.cdte_datamode=current_drive->TocBuffer[i].format;
                if (tocentry.cdte_format==CDROM_MSF) /* MSF-bin required */
                {
                        tocentry.cdte_addr.msf.minute=(current_drive->TocBuffer[i].address>>16)&0x00FF;
                        tocentry.cdte_addr.msf.second=(current_drive->TocBuffer[i].address>>8)&0x00FF;
                        tocentry.cdte_addr.msf.frame=current_drive->TocBuffer[i].address&0x00FF;
                }
                else if (tocentry.cdte_format==CDROM_LBA) /* blk required */
                        tocentry.cdte_addr.lba=msf2blk(current_drive->TocBuffer[i].address);
                else RETURN_UP(-EINVAL);
                memcpy((void *) arg, &tocentry, sizeof(struct cdrom_tocentry));
                RETURN_UP(0);
                
        case CDROMSTOP:      /* Spin down the drive */
                msg(DBG_IOC,"ioctl: CDROMSTOP entered.\n");
#ifdef SAFE_MIXED
                if (current_drive->has_data>1) RETURN_UP(-EBUSY);
#endif /* SAFE_MIXED */ 
                i=cc_Pause_Resume(1);
                current_drive->audio_state=0;
#if 0
                cc_DriveReset();
#endif
                RETURN_UP(i);

        case CDROMSTART:  /* Spin up the drive */
                msg(DBG_IOC,"ioctl: CDROMSTART entered.\n");
                cc_SpinUp();
                current_drive->audio_state=0;
                RETURN_UP(0);

        case CDROMVOLCTRL:   /* Volume control */
                msg(DBG_IOC,"ioctl: CDROMVOLCTRL entered.\n");
                memcpy(&volctrl,(char *) arg,sizeof(volctrl));
                current_drive->vol_chan0=0;
                current_drive->vol_ctrl0=volctrl.channel0;
                current_drive->vol_chan1=1;
                current_drive->vol_ctrl1=volctrl.channel1;
                i=cc_SetVolume();
                RETURN_UP(0);

        case CDROMVOLREAD:   /* read Volume settings from drive */
                msg(DBG_IOC,"ioctl: CDROMVOLREAD entered.\n");
                st=cc_GetVolume();
                if (st<0) RETURN_UP(st);
                volctrl.channel0=current_drive->vol_ctrl0;
                volctrl.channel1=current_drive->vol_ctrl1;
                volctrl.channel2=0;
                volctrl.channel2=0;
                memcpy((void *)arg,&volctrl,sizeof(volctrl));
                RETURN_UP(0);

        case CDROMSUBCHNL:   /* Get subchannel info */
                msg(DBG_IOS,"ioctl: CDROMSUBCHNL entered.\n");
                /* Bogus, I can do better than this! --AJK
                if ((st_spinning)||(!subq_valid)) {
                        i=cc_ReadSubQ();
                        if (i<0) RETURN_UP(-EIO);
                }
                */
                i=cc_ReadSubQ();
                if (i<0) {
                        j=cc_ReadError(); /* clear out error status from drive */
                        current_drive->audio_state=CDROM_AUDIO_NO_STATUS;
                        /* get and set the disk state here,
                        probably not the right place, but who cares!
                        It makes it work properly! --AJK */
                        if (current_drive->CD_changed==0xFF) {
                                msg(DBG_000,"Disk changed detect\n");
                                current_drive->diskstate_flags &= ~cd_size_bit;
                        }
                        RETURN_UP(-EIO);
                }
                if (current_drive->CD_changed==0xFF) {
                        /* reread the TOC because the disk has changed! --AJK */
                        msg(DBG_000,"Disk changed STILL detected, rereading TOC!\n");
                        i=DiskInfo();
                        if(i==0) {
                                current_drive->CD_changed=0x00; /* cd has changed, procede, */
                                RETURN_UP(-EIO); /* and get TOC, etc on next try! --AJK */
                        } else {
                                RETURN_UP(-EIO); /* we weren't ready yet! --AJK */
                        }
                }
                memcpy(&SC, (void *) arg, sizeof(struct cdrom_subchnl));
                /*
                        This virtual crap is very bogus!
                        It doesn't detect when the cd is done playing audio!
                        Lets do this right with proper hardware register reading!
                */
                cc_ReadStatus();
                i=ResponseStatus();
                msg(DBG_000,"Drive Status: door_locked =%d.\n", st_door_locked);
                msg(DBG_000,"Drive Status: door_closed =%d.\n", st_door_closed);
                msg(DBG_000,"Drive Status: caddy_in =%d.\n", st_caddy_in);
                msg(DBG_000,"Drive Status: disk_ok =%d.\n", st_diskok);
                msg(DBG_000,"Drive Status: spinning =%d.\n", st_spinning);
                msg(DBG_000,"Drive Status: busy =%d.\n", st_busy);
                /* st_busy indicates if it's _ACTUALLY_ playing audio */
                switch (current_drive->audio_state)
                {
                case audio_playing:
                        if(st_busy==0) {
                                /* CD has stopped playing audio --AJK */
                                current_drive->audio_state=audio_completed;
                                SC.cdsc_audiostatus=CDROM_AUDIO_COMPLETED;
                        } else {
                                SC.cdsc_audiostatus=CDROM_AUDIO_PLAY;
                        }
                        break;
                case audio_pausing:
                        SC.cdsc_audiostatus=CDROM_AUDIO_PAUSED;
                        break;
                case audio_completed:
                        SC.cdsc_audiostatus=CDROM_AUDIO_COMPLETED;
                        break;
                default:
                        SC.cdsc_audiostatus=CDROM_AUDIO_NO_STATUS;
                        break;
                }
                SC.cdsc_adr=current_drive->SubQ_ctl_adr;
                SC.cdsc_ctrl=current_drive->SubQ_ctl_adr>>4;
                SC.cdsc_trk=bcd2bin(current_drive->SubQ_trk);
                SC.cdsc_ind=bcd2bin(current_drive->SubQ_pnt_idx);
                if (SC.cdsc_format==CDROM_LBA)
                {
                        SC.cdsc_absaddr.lba=msf2blk(current_drive->SubQ_run_tot);
                        SC.cdsc_reladdr.lba=msf2blk(current_drive->SubQ_run_trk);
                }
                else /* not only if (SC.cdsc_format==CDROM_MSF) */
                {
                        SC.cdsc_absaddr.msf.minute=(current_drive->SubQ_run_tot>>16)&0x00FF;
                        SC.cdsc_absaddr.msf.second=(current_drive->SubQ_run_tot>>8)&0x00FF;
                        SC.cdsc_absaddr.msf.frame=current_drive->SubQ_run_tot&0x00FF;
                        SC.cdsc_reladdr.msf.minute=(current_drive->SubQ_run_trk>>16)&0x00FF;
                        SC.cdsc_reladdr.msf.second=(current_drive->SubQ_run_trk>>8)&0x00FF;
                        SC.cdsc_reladdr.msf.frame=current_drive->SubQ_run_trk&0x00FF;
                }
                memcpy((void *) arg, &SC, sizeof(struct cdrom_subchnl));
                msg(DBG_IOS,"CDROMSUBCHNL: %1X %02X %08X %08X %02X %02X %06X %06X\n",
                    SC.cdsc_format,SC.cdsc_audiostatus,
                    SC.cdsc_adr,SC.cdsc_ctrl,
                    SC.cdsc_trk,SC.cdsc_ind,
                    SC.cdsc_absaddr,SC.cdsc_reladdr);
                RETURN_UP(0);

        default:
                msg(DBG_IOC,"ioctl: unknown function request %04X\n", cmd);
                RETURN_UP(-EINVAL);
        } /* end switch(cmd) */
}
/*==========================================================================*/
/*
 *  Take care of the different block sizes between cdrom and Linux.
 */
static void sbp_transfer(struct request *req)
{
        long offs;

        while ( (req->nr_sectors > 0) &&
               (req->sector/4 >= current_drive->sbp_first_frame) &&
               (req->sector/4 <= current_drive->sbp_last_frame) )
        {
                offs = (req->sector - current_drive->sbp_first_frame * 4) * 512;
                memcpy(req->buffer, current_drive->sbp_buf + offs, 512);
                req->nr_sectors--;
                req->sector++;
                req->buffer += 512;
        }
}
/*==========================================================================*/
/*
 *  special end_request for sbpcd to solve CURRENT==NULL bug. (GTL)
 *  GTL = Gonzalo Tornaria <tornaria@cmat.edu.uy>
 *
 *  This is a kludge so we don't need to modify end_request.
 *  We put the req we take out after INIT_REQUEST in the requests list,
 *  so that end_request will discard it.
 *
 *  The bug could be present in other block devices, perhaps we
 *  should modify INIT_REQUEST and end_request instead, and
 *  change every block device..
 *
 *  Could be a race here?? Could e.g. a timer interrupt schedule() us?
 *  If so, we should copy end_request here, and do it right.. (or
 *  modify end_request and the block devices).
 *
 *  In any case, the race here would be much small than it was, and
 *  I couldn't reproduce..
 *
 *  The race could be: suppose CURRENT==NULL. We put our req in the list,
 *  and we are scheduled. Other process takes over, and gets into
 *  do_sbpcd_request. It sees CURRENT!=NULL (it is == to our req), so
 *  proceeds. It ends, so CURRENT is now NULL.. Now we awake somewhere in
 *  end_request, but now CURRENT==NULL... oops!
 *
 */
#undef DEBUG_GTL

/*==========================================================================*/
/*
 *  I/O request routine, called from Linux kernel.
 */
static void do_sbpcd_request(request_queue_t * q)
{
        u_int block;
        u_int nsect;
        int status_tries, data_tries;
        struct request *req;
        struct sbpcd_drive *p;
#ifdef DEBUG_GTL
        static int xx_nr=0;
        int xnr;
#endif

 request_loop:
#ifdef DEBUG_GTL
        xnr=++xx_nr;

        req = elv_next_request(q);

        if (!req)
        {
                printk( "do_sbpcd_request[%di](NULL), Pid:%d, Time:%li\n",
                        xnr, current->pid, jiffies);
                printk( "do_sbpcd_request[%do](NULL) end 0 (null), Time:%li\n",
                        xnr, jiffies);
                return;
        }

        printk(" do_sbpcd_request[%di](%p:%ld+%ld), Pid:%d, Time:%li\n",
                xnr, req, req->sector, req->nr_sectors, current->pid, jiffies);
#endif

        req = elv_next_request(q);      /* take out our request so no other */
        if (!req)
                return;

        if (req -> sector == -1)
                end_request(req, 0);
        spin_unlock_irq(q->queue_lock);

        down(&ioctl_read_sem);
        if (rq_data_dir(elv_next_request(q)) != READ)
        {
                msg(DBG_INF, "bad cmd %d\n", req->cmd[0]);
                goto err_done;
        }
        p = req->rq_disk->private_data;
#if OLD_BUSY
        while (busy_audio) sbp_sleep(HZ); /* wait a bit */
        busy_data=1;
#endif /* OLD_BUSY */

        if (p->audio_state==audio_playing) goto err_done;
        if (p != current_drive)
                switch_drive(p);

        block = req->sector; /* always numbered as 512-byte-pieces */
        nsect = req->nr_sectors; /* always counted as 512-byte-pieces */

        msg(DBG_BSZ,"read sector %d (%d sectors)\n", block, nsect);
#if 0
        msg(DBG_MUL,"read LBA %d\n", block/4);
#endif

        sbp_transfer(req);
        /* if we satisfied the request from the buffer, we're done. */
        if (req->nr_sectors == 0)
        {
#ifdef DEBUG_GTL
                printk(" do_sbpcd_request[%do](%p:%ld+%ld) end 2, Time:%li\n",
                        xnr, req, req->sector, req->nr_sectors, jiffies);
#endif
                up(&ioctl_read_sem);
                spin_lock_irq(q->queue_lock);
                end_request(req, 1);
                goto request_loop;
        }

#ifdef FUTURE
        i=prepare(0,0); /* at moment not really a hassle check, but ... */
        if (i!=0)
                msg(DBG_INF,"\"prepare\" tells error %d -- ignored\n", i);
#endif /* FUTURE */

        if (!st_spinning) cc_SpinUp();

        for (data_tries=n_retries; data_tries > 0; data_tries--)
        {
                for (status_tries=3; status_tries > 0; status_tries--)
                {
                        flags_cmd_out |= f_respo3;
                        cc_ReadStatus();
                        if (sbp_status() != 0) break;
                        if (st_check) cc_ReadError();
                        sbp_sleep(1);    /* wait a bit, try again */
                }
                if (status_tries == 0)
                {
                        msg(DBG_INF,"sbp_status: failed after 3 tries in line %d\n", __LINE__);
                        break;
                }
                
                sbp_read_cmd(req);
                sbp_sleep(0);
                if (sbp_data(req) != 0)
                {
#ifdef SAFE_MIXED
                        current_drive->has_data=2; /* is really a data disk */
#endif /* SAFE_MIXED */
#ifdef DEBUG_GTL
                        printk(" do_sbpcd_request[%do](%p:%ld+%ld) end 3, Time:%li\n",
                                xnr, req, req->sector, req->nr_sectors, jiffies);
#endif
                        up(&ioctl_read_sem);
                        spin_lock_irq(q->queue_lock);
                        end_request(req, 1);
                        goto request_loop;
                }
        }

 err_done:
#if OLD_BUSY
        busy_data=0;
#endif /* OLD_BUSY */
#ifdef DEBUG_GTL
        printk(" do_sbpcd_request[%do](%p:%ld+%ld) end 4 (error), Time:%li\n",
                xnr, req, req->sector, req->nr_sectors, jiffies);
#endif
        up(&ioctl_read_sem);
        sbp_sleep(0);    /* wait a bit, try again */
        spin_lock_irq(q->queue_lock);
        end_request(req, 0);
        goto request_loop;
}
/*==========================================================================*/
/*
 *  build and send the READ command.
 */
static void sbp_read_cmd(struct request *req)
{
#undef OLD

        int i;
        int block;

        current_drive->sbp_first_frame=current_drive->sbp_last_frame=-1;      /* purge buffer */
        current_drive->sbp_current = 0;
        block=req->sector/4;
        if (block+current_drive->sbp_bufsiz <= current_drive->CDsize_frm)
                current_drive->sbp_read_frames = current_drive->sbp_bufsiz;
        else
        {
                current_drive->sbp_read_frames=current_drive->CDsize_frm-block;
                /* avoid reading past end of data */
                if (current_drive->sbp_read_frames < 1)
                {
                        msg(DBG_INF,"requested frame %d, CD size %d ???\n",
                            block, current_drive->CDsize_frm);
                        current_drive->sbp_read_frames=1;
                }
        }

        flags_cmd_out = f_putcmd | f_respo2 | f_ResponseStatus | f_obey_p_check;
        clr_cmdbuf();
        if (famV_drive)
          {
            drvcmd[0]=CMDV_READ;
            lba2msf(block,&drvcmd[1]); /* msf-bcd format required */
            bin2bcdx(&drvcmd[1]);
            bin2bcdx(&drvcmd[2]);
            bin2bcdx(&drvcmd[3]);
            drvcmd[4]=current_drive->sbp_read_frames>>8;
            drvcmd[5]=current_drive->sbp_read_frames&0xff;
            drvcmd[6]=0x02; /* flag "msf-bcd" */
        }
        else if (fam0L_drive)
        {
                flags_cmd_out |= f_lopsta | f_getsta | f_bit1;
                if (current_drive->xa_byte==0x20)
                {
                        cmd_type=READ_M2;
                        drvcmd[0]=CMD0_READ_XA; /* "read XA frames", old drives */
                        drvcmd[1]=(block>>16)&0x0ff;
                        drvcmd[2]=(block>>8)&0x0ff;
                        drvcmd[3]=block&0x0ff;
                        drvcmd[4]=(current_drive->sbp_read_frames>>8)&0x0ff;
                        drvcmd[5]=current_drive->sbp_read_frames&0x0ff;
                }
                else
                {
                        drvcmd[0]=CMD0_READ; /* "read frames", old drives */
                        if (current_drive->drv_type>=drv_201)
                        {
                                lba2msf(block,&drvcmd[1]); /* msf-bcd format required */
                                bin2bcdx(&drvcmd[1]);
                                bin2bcdx(&drvcmd[2]);
                                bin2bcdx(&drvcmd[3]);
                        }
                        else
                        {
                                drvcmd[1]=(block>>16)&0x0ff;
                                drvcmd[2]=(block>>8)&0x0ff;
                                drvcmd[3]=block&0x0ff;
                        }
                        drvcmd[4]=(current_drive->sbp_read_frames>>8)&0x0ff;
                        drvcmd[5]=current_drive->sbp_read_frames&0x0ff;
                        drvcmd[6]=(current_drive->drv_type<drv_201)?0:2; /* flag "lba or msf-bcd format" */
                }
        }
        else if (fam1_drive)
        {
                drvcmd[0]=CMD1_READ;
                lba2msf(block,&drvcmd[1]); /* msf-bin format required */
                drvcmd[5]=(current_drive->sbp_read_frames>>8)&0x0ff;
                drvcmd[6]=current_drive->sbp_read_frames&0x0ff;
        }
        else if (fam2_drive)
        {
                drvcmd[0]=CMD2_READ;
                lba2msf(block,&drvcmd[1]); /* msf-bin format required */
                drvcmd[4]=(current_drive->sbp_read_frames>>8)&0x0ff;
                drvcmd[5]=current_drive->sbp_read_frames&0x0ff;
                drvcmd[6]=0x02;
        }
        else if (famT_drive)
        {
                drvcmd[0]=CMDT_READ;
                drvcmd[2]=(block>>24)&0x0ff;
                drvcmd[3]=(block>>16)&0x0ff;
                drvcmd[4]=(block>>8)&0x0ff;
                drvcmd[5]=block&0x0ff;
                drvcmd[7]=(current_drive->sbp_read_frames>>8)&0x0ff;
                drvcmd[8]=current_drive->sbp_read_frames&0x0ff;
        }
        flags_cmd_out=f_putcmd;
        response_count=0;
        i=cmd_out();
        if (i<0) msg(DBG_INF,"error giving READ command: %0d\n", i);
        return;
}
/*==========================================================================*/
/*
 *  Check the completion of the read-data command.  On success, read
 *  the current_drive->sbp_bufsiz * 2048 bytes of data from the disk into buffer.
 */
static int sbp_data(struct request *req)
{
        int i=0, j=0, l, frame;
        u_int try=0;
        u_long timeout;
        u_char *p;
        u_int data_tries = 0;
        u_int data_waits = 0;
        u_int data_retrying = 0;
        int error_flag;
        int xa_count;
        int max_latency;
        int success;
        int wait;
        int duration;

        error_flag=0;
        success=0;
#if LONG_TIMING
        max_latency=9*HZ;
#else
        if (current_drive->f_multisession) max_latency=15*HZ;
        else max_latency=5*HZ;
#endif
        duration=jiffies;
        for (frame=0;frame<current_drive->sbp_read_frames&&!error_flag; frame++)
        {
                SBPCD_CLI;

                del_timer(&data_timer);
                data_timer.expires=jiffies+max_latency;
                timed_out_data=0;
                add_timer(&data_timer);
                while (!timed_out_data)
                {
                        if (current_drive->f_multisession) try=maxtim_data*4;
                        else try=maxtim_data;
                        msg(DBG_000,"sbp_data: CDi_status loop: try=%d.\n",try);
                        for ( ; try!=0;try--)
                        {
                                j=inb(CDi_status);
                                if (!(j&s_not_data_ready)) break;
                                if (!(j&s_not_result_ready)) break;
                                if (fam0LV_drive) if (j&s_attention) break;
                        }
                        if (!(j&s_not_data_ready)) goto data_ready;
                        if (try==0)
                        {
                                if (data_retrying == 0) data_waits++;
                                data_retrying = 1;
                                msg(DBG_000,"sbp_data: CDi_status loop: sleeping.\n");
                                sbp_sleep(1);
                                try = 1;
                        }
                }
                msg(DBG_INF,"sbp_data: CDi_status loop expired.\n");
        data_ready:
                del_timer(&data_timer);

                if (timed_out_data)
                {
                        msg(DBG_INF,"sbp_data: CDi_status timeout (timed_out_data) (%02X).\n", j);
                        error_flag++;
                }
                if (try==0)
                {
                        msg(DBG_INF,"sbp_data: CDi_status timeout (try=0) (%02X).\n", j);
                        error_flag++;
                }
                if (!(j&s_not_result_ready))
                {
                        msg(DBG_INF, "sbp_data: RESULT_READY where DATA_READY awaited (%02X).\n", j);
                        response_count=20;
                        j=ResponseInfo();
                        j=inb(CDi_status);
                }
                if (j&s_not_data_ready)
                {
                        if ((current_drive->ored_ctl_adr&0x40)==0)
                                msg(DBG_INF, "CD contains no data tracks.\n");
                        else msg(DBG_INF, "sbp_data: DATA_READY timeout (%02X).\n", j);
                        error_flag++;
                }
                SBPCD_STI;
                if (error_flag) break;

                msg(DBG_000, "sbp_data: beginning to read.\n");
                p = current_drive->sbp_buf + frame *  CD_FRAMESIZE;
                if (sbpro_type==1) OUT(CDo_sel_i_d,1);
                if (cmd_type==READ_M2) {
                        if (do_16bit) insw(CDi_data, xa_head_buf, CD_XA_HEAD>>1);
                        else insb(CDi_data, xa_head_buf, CD_XA_HEAD);
                }
                if (do_16bit) insw(CDi_data, p, CD_FRAMESIZE>>1);
                else insb(CDi_data, p, CD_FRAMESIZE);
                if (cmd_type==READ_M2) {
                        if (do_16bit) insw(CDi_data, xa_tail_buf, CD_XA_TAIL>>1);
                        else insb(CDi_data, xa_tail_buf, CD_XA_TAIL);
                }
                current_drive->sbp_current++;
                if (sbpro_type==1) OUT(CDo_sel_i_d,0);
                if (cmd_type==READ_M2)
                {
                        for (xa_count=0;xa_count<CD_XA_HEAD;xa_count++)
                                sprintf(&msgbuf[xa_count*3], " %02X", xa_head_buf[xa_count]);
                        msgbuf[xa_count*3]=0;
                        msg(DBG_XA1,"xa head:%s\n", msgbuf);
                }
                data_retrying = 0;
                data_tries++;
                if (data_tries >= 1000)
                {
                        msg(DBG_INF,"sbp_data() statistics: %d waits in %d frames.\n", data_waits, data_tries);
                        data_waits = data_tries = 0;
                }
        }
        duration=jiffies-duration;
        msg(DBG_TEA,"time to read %d frames: %d jiffies .\n",frame,duration);
        if (famT_drive)
        {
                wait=8;
                do
                {
                        if (teac==2)
                          {
                            if ((i=CDi_stat_loop_T()) == -1) break;
                          }
                        else
                          {
                            sbp_sleep(1);
                            OUT(CDo_sel_i_d,0);
                            i=inb(CDi_status);
                          }
                        if (!(i&s_not_data_ready))
                        {
                                OUT(CDo_sel_i_d,1);
                                j=0;
                                do
                                {
                                        if (do_16bit) i=inw(CDi_data);
                                        else i=inb(CDi_data);
                                        j++;
                                        i=inb(CDi_status);
                                }
                                while (!(i&s_not_data_ready));
                                msg(DBG_TEA, "==========too much data (%d bytes/words)==============.\n", j);
                        }
                        if (!(i&s_not_result_ready))
                        {
                                OUT(CDo_sel_i_d,0);
                                l=0;
                                do
                                {
                                        infobuf[l++]=inb(CDi_info);
                                        i=inb(CDi_status);
                                }
                                while (!(i&s_not_result_ready));
                                if (infobuf[0]==0x00) success=1;
#if 1
                                for (j=0;j<l;j++) sprintf(&msgbuf[j*3], " %02X", infobuf[j]);
                                msgbuf[j*3]=0;
                                msg(DBG_TEA,"sbp_data info response:%s\n", msgbuf);
#endif
                                if (infobuf[0]==0x02)
                                {
                                        error_flag++;
                                        do
                                        {
                                                ++recursion;
                                                if (recursion>1) msg(DBG_TEA,"cmd_out_T READ_ERR recursion (sbp_data): %d !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!\n",recursion);
                                                else msg(DBG_TEA,"sbp_data: CMDT_READ_ERR necessary.\n");
                                                clr_cmdbuf();
                                                drvcmd[0]=CMDT_READ_ERR;
                                                j=cmd_out_T(); /* !!! recursive here !!! */
                                                --recursion;
                                                sbp_sleep(1);
                                        }
                                        while (j<0);
                                        current_drive->error_state=infobuf[2];
                                        current_drive->b3=infobuf[3];
                                        current_drive->b4=infobuf[4];
                                }
                                break;
                        }
                        else
                        {
#if 0
                                msg(DBG_TEA, "============= waiting for result=================.\n");
                                sbp_sleep(1);
#endif
                        }
                }
                while (wait--);
        }

        if (error_flag) /* must have been spurious D_RDY or (ATTN&&!D_RDY) */
        {
                msg(DBG_TEA, "================error flag: %d=================.\n", error_flag);
                msg(DBG_INF,"sbp_data: read aborted by drive.\n");
#if 1
                i=cc_DriveReset(); /* ugly fix to prevent a hang */
#else
                i=cc_ReadError();
#endif
                return (0);
        }
        
        if (fam0LV_drive)
        {
                SBPCD_CLI;
                i=maxtim_data;
                for (timeout=jiffies+HZ; time_before(jiffies, timeout); timeout--)
                {
                        for ( ;i!=0;i--)
                        {
                                j=inb(CDi_status);
                                if (!(j&s_not_data_ready)) break;
                                if (!(j&s_not_result_ready)) break;
                                if (j&s_attention) break;
                        }
                        if (i != 0 || time_after_eq(jiffies, timeout)) break;
                        sbp_sleep(0);
                        i = 1;
                }
                if (i==0) msg(DBG_INF,"status timeout after READ.\n");
                if (!(j&s_attention))
                {
                        msg(DBG_INF,"sbp_data: timeout waiting DRV_ATTN - retrying.\n");
                        i=cc_DriveReset();  /* ugly fix to prevent a hang */
                        SBPCD_STI;
                        return (0);
                }
                SBPCD_STI;
        }

#if 0
        if (!success)
#endif
                do
                {
                        if (fam0LV_drive) cc_ReadStatus();
#if 1
                        if (famT_drive) msg(DBG_TEA, "================before ResponseStatus=================.\n", i);
#endif
                        i=ResponseStatus();  /* builds status_bits, returns orig. status (old) or faked p_success (new) */
#if 1
                        if (famT_drive) msg(DBG_TEA, "================ResponseStatus: %d=================.\n", i);
#endif
                        if (i<0)
                        {
                                msg(DBG_INF,"bad cc_ReadStatus after read: %02X\n", current_drive->status_bits);
                                return (0);
                        }
                }
                while ((fam0LV_drive)&&(!st_check)&&(!(i&p_success)));
        if (st_check)
        {
                i=cc_ReadError();
                msg(DBG_INF,"cc_ReadError was necessary after read: %d\n",i);
                return (0);
        }
        if (fatal_err)
        {
                fatal_err=0;
                current_drive->sbp_first_frame=current_drive->sbp_last_frame=-1;      /* purge buffer */
                current_drive->sbp_current = 0;
                msg(DBG_INF,"sbp_data: fatal_err - retrying.\n");
                return (0);
        }
        
        current_drive->sbp_first_frame = req -> sector / 4;
        current_drive->sbp_last_frame = current_drive->sbp_first_frame + current_drive->sbp_read_frames - 1;
        sbp_transfer(req);
        return (1);
}
/*==========================================================================*/

static int sbpcd_block_open(struct inode *inode, struct file *file)
{
        struct sbpcd_drive *p = inode->i_bdev->bd_disk->private_data;
        return cdrom_open(p->sbpcd_infop, inode, file);
}

static int sbpcd_block_release(struct inode *inode, struct file *file)
{
        struct sbpcd_drive *p = inode->i_bdev->bd_disk->private_data;
        return cdrom_release(p->sbpcd_infop, file);
}

static int sbpcd_block_ioctl(struct inode *inode, struct file *file,
                                unsigned cmd, unsigned long arg)
{
        struct sbpcd_drive *p = inode->i_bdev->bd_disk->private_data;
        struct cdrom_device_info *cdi = p->sbpcd_infop;
        int ret, i;

        ret = cdrom_ioctl(file, p->sbpcd_infop, inode, cmd, arg);
        if (ret != -ENOSYS)
                return ret;

        msg(DBG_IO2,"ioctl(%s, 0x%08lX, 0x%08lX)\n", cdi->name, cmd, arg);
        if (p->drv_id==-1) {
                msg(DBG_INF, "ioctl: bad device: %s\n", cdi->name);
                return (-ENXIO);             /* no such drive */
        }
        down(&ioctl_read_sem);
        if (p != current_drive)
                switch_drive(p);
        
        msg(DBG_IO2,"ioctl: device %s, request %04X\n",cdi->name,cmd);
        switch (cmd)            /* Sun-compatible */
        {
        case DDIOCSDBG:         /* DDI Debug */
                if (!capable(CAP_SYS_ADMIN)) RETURN_UP(-EPERM);
                i=sbpcd_dbg_ioctl(arg,1);
                RETURN_UP(i);
        case CDROMRESET:      /* hard reset the drive */
                msg(DBG_IOC,"ioctl: CDROMRESET entered.\n");
                i=DriveReset();
                current_drive->audio_state=0;
                RETURN_UP(i);

        case CDROMREADMODE1:
                msg(DBG_IOC,"ioctl: CDROMREADMODE1 requested.\n");
#ifdef SAFE_MIXED
                if (current_drive->has_data>1) RETURN_UP(-EBUSY);
#endif /* SAFE_MIXED */
                cc_ModeSelect(CD_FRAMESIZE);
                cc_ModeSense();
                current_drive->mode=READ_M1;
                RETURN_UP(0);

        case CDROMREADMODE2: /* not usable at the moment */
                msg(DBG_IOC,"ioctl: CDROMREADMODE2 requested.\n");
#ifdef SAFE_MIXED
                if (current_drive->has_data>1) RETURN_UP(-EBUSY);
#endif /* SAFE_MIXED */
                cc_ModeSelect(CD_FRAMESIZE_RAW1);
                cc_ModeSense();
                current_drive->mode=READ_M2;
                RETURN_UP(0);

        case CDROMAUDIOBUFSIZ: /* configure the audio buffer size */
                msg(DBG_IOC,"ioctl: CDROMAUDIOBUFSIZ entered.\n");
                if (current_drive->sbp_audsiz>0)
                        vfree(current_drive->aud_buf);
                current_drive->aud_buf=NULL;
                current_drive->sbp_audsiz=arg;

                if (current_drive->sbp_audsiz>16)
                {
                        current_drive->sbp_audsiz = 0;
                        RETURN_UP(current_drive->sbp_audsiz);
                }
        
                if (current_drive->sbp_audsiz>0)
                {
                        current_drive->aud_buf=(u_char *) vmalloc(current_drive->sbp_audsiz*CD_FRAMESIZE_RAW);
                        if (current_drive->aud_buf==NULL)
                        {
                                msg(DBG_INF,"audio buffer (%d frames) not available.\n",current_drive->sbp_audsiz);
                                current_drive->sbp_audsiz=0;
                        }
                        else msg(DBG_INF,"audio buffer size: %d frames.\n",current_drive->sbp_audsiz);
                }
                RETURN_UP(current_drive->sbp_audsiz);

        case CDROMREADAUDIO:
        { /* start of CDROMREADAUDIO */
                int i=0, j=0, frame, block=0;
                u_int try=0;
                u_long timeout;
                u_char *p;
                u_int data_tries = 0;
                u_int data_waits = 0;
                u_int data_retrying = 0;
                int status_tries;
                int error_flag;

                msg(DBG_IOC,"ioctl: CDROMREADAUDIO entered.\n");
                if (fam0_drive) RETURN_UP(-EINVAL);
                if (famL_drive) RETURN_UP(-EINVAL);
                if (famV_drive) RETURN_UP(-EINVAL);
                if (famT_drive) RETURN_UP(-EINVAL);
#ifdef SAFE_MIXED
                if (current_drive->has_data>1) RETURN_UP(-EBUSY);
#endif /* SAFE_MIXED */
                if (current_drive->aud_buf==NULL) RETURN_UP(-EINVAL);
                if (copy_from_user(&read_audio, (void __user *)arg,
                                   sizeof(struct cdrom_read_audio)))
                        RETURN_UP(-EFAULT);
                if (read_audio.nframes < 0 || read_audio.nframes>current_drive->sbp_audsiz) RETURN_UP(-EINVAL);
                if (!access_ok(VERIFY_WRITE, read_audio.buf,
                              read_audio.nframes*CD_FRAMESIZE_RAW))
                        RETURN_UP(-EFAULT);

                if (read_audio.addr_format==CDROM_MSF) /* MSF-bin specification of where to start */
                        block=msf2lba(&read_audio.addr.msf.minute);
                else if (read_audio.addr_format==CDROM_LBA) /* lba specification of where to start */
                        block=read_audio.addr.lba;
                else RETURN_UP(-EINVAL);
#if 000
                i=cc_SetSpeed(speed_150,0,0);
                if (i) msg(DBG_AUD,"read_audio: SetSpeed error %d\n", i);
#endif
                msg(DBG_AUD,"read_audio: lba: %d, msf: %06X\n",
                    block, blk2msf(block));
                msg(DBG_AUD,"read_audio: before cc_ReadStatus.\n");
#if OLD_BUSY
                while (busy_data) sbp_sleep(HZ/10); /* wait a bit */
                busy_audio=1;
#endif /* OLD_BUSY */
                error_flag=0;
                for (data_tries=5; data_tries>0; data_tries--)
                {
                        msg(DBG_AUD,"data_tries=%d ...\n", data_tries);
                        current_drive->mode=READ_AU;
                        cc_ModeSelect(CD_FRAMESIZE_RAW);
                        cc_ModeSense();
                        for (status_tries=3; status_tries > 0; status_tries--)
                        {
                                flags_cmd_out |= f_respo3;
                                cc_ReadStatus();
                                if (sbp_status() != 0) break;
                                if (st_check) cc_ReadError();
                                sbp_sleep(1);    /* wait a bit, try again */
                        }
                        if (status_tries == 0)
                        {
                                msg(DBG_AUD,"read_audio: sbp_status: failed after 3 tries in line %d.\n", __LINE__);
                                continue;
                        }
                        msg(DBG_AUD,"read_audio: sbp_status: ok.\n");

                        flags_cmd_out = f_putcmd | f_respo2 | f_ResponseStatus | f_obey_p_check;
                        if (fam0L_drive)
                        {
                                flags_cmd_out |= f_lopsta | f_getsta | f_bit1;
                                cmd_type=READ_M2;
                                drvcmd[0]=CMD0_READ_XA; /* "read XA frames", old drives */
                                drvcmd[1]=(block>>16)&0x000000ff;
                                drvcmd[2]=(block>>8)&0x000000ff;
                                drvcmd[3]=block&0x000000ff;
                                drvcmd[4]=0;
                                drvcmd[5]=read_audio.nframes; /* # of frames */
                                drvcmd[6]=0;
                        }
                        else if (fam1_drive)
                        {
                                drvcmd[0]=CMD1_READ; /* "read frames", new drives */
                                lba2msf(block,&drvcmd[1]); /* msf-bin format required */
                                drvcmd[4]=0;
                                drvcmd[5]=0;
                                drvcmd[6]=read_audio.nframes; /* # of frames */
                        }
                        else if (fam2_drive)
                        {
                                drvcmd[0]=CMD2_READ_XA2;
                                lba2msf(block,&drvcmd[1]); /* msf-bin format required */
                                drvcmd[4]=0;
                                drvcmd[5]=read_audio.nframes; /* # of frames */
                                drvcmd[6]=0x11; /* raw mode */
                        }
                        else if (famT_drive) /* CD-55A: not tested yet */
                        {
                        }
                        msg(DBG_AUD,"read_audio: before giving \"read\" command.\n");
                        flags_cmd_out=f_putcmd;
                        response_count=0;
                        i=cmd_out();
                        if (i<0) msg(DBG_INF,"error giving READ AUDIO command: %0d\n", i);
                        sbp_sleep(0);
                        msg(DBG_AUD,"read_audio: after giving \"read\" command.\n");
                        for (frame=1;frame<2 && !error_flag; frame++)
                        {
                                try=maxtim_data;
                                for (timeout=jiffies+9*HZ; ; )
                                {
                                        for ( ; try!=0;try--)
                                        {
                                                j=inb(CDi_status);
                                                if (!(j&s_not_data_ready)) break;
                                                if (!(j&s_not_result_ready)) break;
                                                if (fam0L_drive) if (j&s_attention) break;
                                        }
                                        if (try != 0 || time_after_eq(jiffies, timeout)) break;
                                        if (data_retrying == 0) data_waits++;
                                        data_retrying = 1;
                                        sbp_sleep(1);
                                        try = 1;
                                }
                                if (try==0)
                                {
                                        msg(DBG_INF,"read_audio: sbp_data: CDi_status timeout.\n");
                                        error_flag++;
                                        break;
                                }
                                msg(DBG_AUD,"read_audio: sbp_data: CDi_status ok.\n");
                                if (j&s_not_data_ready)
                                {
                                        msg(DBG_INF, "read_audio: sbp_data: DATA_READY timeout.\n");
                                        error_flag++;
                                        break;
                                }
                                msg(DBG_AUD,"read_audio: before reading data.\n");
                                error_flag=0;
                                p = current_drive->aud_buf;
                                if (sbpro_type==1) OUT(CDo_sel_i_d,1);
                                if (do_16bit)
                                {
                                        u_short *p2 = (u_short *) p;

                                        for (; (u_char *) p2 < current_drive->aud_buf + read_audio.nframes*CD_FRAMESIZE_RAW;)
                                        {
                                                if ((inb_p(CDi_status)&s_not_data_ready)) continue;

                                                /* get one sample */
                                                *p2++ = inw_p(CDi_data);
                                                *p2++ = inw_p(CDi_data);
                                        }
                                } else {
                                        for (; p < current_drive->aud_buf + read_audio.nframes*CD_FRAMESIZE_RAW;)
                                        {
                                                if ((inb_p(CDi_status)&s_not_data_ready)) continue;

                                                /* get one sample */
                                                *p++ = inb_p(CDi_data);
                                                *p++ = inb_p(CDi_data);
                                                *p++ = inb_p(CDi_data);
                                                *p++ = inb_p(CDi_data);
                                        }
                                }
                                if (sbpro_type==1) OUT(CDo_sel_i_d,0);
                                data_retrying = 0;
                        }
                        msg(DBG_AUD,"read_audio: after reading data.\n");
                        if (error_flag)    /* must have been spurious D_RDY or (ATTN&&!D_RDY) */
                        {
                                msg(DBG_AUD,"read_audio: read aborted by drive\n");
#if 0000
                                i=cc_DriveReset();                /* ugly fix to prevent a hang */
#else
                                i=cc_ReadError();
#endif
                                continue;
                        }
                        if (fam0L_drive)
                        {
                                i=maxtim_data;
                                for (timeout=jiffies+9*HZ; time_before(jiffies, timeout); timeout--)
                                {
                                        for ( ;i!=0;i--)
                                        {
                                                j=inb(CDi_status);
                                                if (!(j&s_not_data_ready)) break;
                                                if (!(j&s_not_result_ready)) break;
                                                if (j&s_attention) break;
                                        }
                                        if (i != 0 || time_after_eq(jiffies, timeout)) break;
                                        sbp_sleep(0);
                                        i = 1;
                                }
                                if (i==0) msg(DBG_AUD,"read_audio: STATUS TIMEOUT AFTER READ");
                                if (!(j&s_attention))
                                {
                                        msg(DBG_AUD,"read_audio: sbp_data: timeout waiting DRV_ATTN - retrying\n");
                                        i=cc_DriveReset();  /* ugly fix to prevent a hang */
                                        continue;
                                }
                        }
                        do
                        {
                                if (fam0L_drive) cc_ReadStatus();
                                i=ResponseStatus();  /* builds status_bits, returns orig. status (old) or faked p_success (new) */
                                if (i<0) { msg(DBG_AUD,
                                               "read_audio: cc_ReadStatus error after read: %02X\n",
                                               current_drive->status_bits);
                                           continue; /* FIXME */
                                   }
                        }
                        while ((fam0L_drive)&&(!st_check)&&(!(i&p_success)));
                        if (st_check)
                        {
                                i=cc_ReadError();
                                msg(DBG_AUD,"read_audio: cc_ReadError was necessary after read: %02X\n",i);
                                continue;
                        }
                        if (copy_to_user(read_audio.buf,
                                         current_drive->aud_buf,
                                         read_audio.nframes * CD_FRAMESIZE_RAW))
                                RETURN_UP(-EFAULT);
                        msg(DBG_AUD,"read_audio: copy_to_user done.\n");
                        break;
                }
                cc_ModeSelect(CD_FRAMESIZE);
                cc_ModeSense();
                current_drive->mode=READ_M1;
#if OLD_BUSY
                busy_audio=0;
#endif /* OLD_BUSY */
                if (data_tries == 0)
                {
                        msg(DBG_AUD,"read_audio: failed after 5 tries in line %d.\n", __LINE__);
                        RETURN_UP(-EIO);
                }
                msg(DBG_AUD,"read_audio: successful return.\n");
                RETURN_UP(0);
        } /* end of CDROMREADAUDIO */

        default:
                msg(DBG_IOC,"ioctl: unknown function request %04X\n", cmd);
                RETURN_UP(-EINVAL);
        } /* end switch(cmd) */
}

static int sbpcd_block_media_changed(struct gendisk *disk)
{
        struct sbpcd_drive *p = disk->private_data;
        return cdrom_media_changed(p->sbpcd_infop);
}

static struct block_device_operations sbpcd_bdops =
{
        .owner          = THIS_MODULE,
        .open           = sbpcd_block_open,
        .release        = sbpcd_block_release,
        .ioctl          = sbpcd_block_ioctl,
        .media_changed  = sbpcd_block_media_changed,
};
/*==========================================================================*/
/*
 *  Open the device special file.  Check that a disk is in. Read TOC.
 */
static int sbpcd_open(struct cdrom_device_info *cdi, int purpose)
{
        struct sbpcd_drive *p = cdi->handle;

        down(&ioctl_read_sem);
        switch_drive(p);

        /*
         * try to keep an "open" counter here and lock the door if 0->1.
         */
        msg(DBG_LCK,"open_count: %d -> %d\n",
            current_drive->open_count,current_drive->open_count+1);
        if (++current_drive->open_count<=1)
        {
                int i;
                i=LockDoor();
                current_drive->open_count=1;
                if (famT_drive) msg(DBG_TEA,"sbpcd_open: before i=DiskInfo();.\n");
                i=DiskInfo();
                if (famT_drive) msg(DBG_TEA,"sbpcd_open: after i=DiskInfo();.\n");
                if ((current_drive->ored_ctl_adr&0x40)==0)
                {               
                        msg(DBG_INF,"CD contains no data tracks.\n");
#ifdef SAFE_MIXED
                        current_drive->has_data=0;
#endif /* SAFE_MIXED */
                }
#ifdef SAFE_MIXED
                else if (current_drive->has_data<1) current_drive->has_data=1;
#endif /* SAFE_MIXED */ 
        }
        if (!st_spinning) cc_SpinUp();
        RETURN_UP(0);
}
/*==========================================================================*/
/*
 *  On close, we flush all sbp blocks from the buffer cache.
 */
static void sbpcd_release(struct cdrom_device_info * cdi)
{
        struct sbpcd_drive *p = cdi->handle;

        if (p->drv_id==-1) {
                msg(DBG_INF, "release: bad device: %s\n", cdi->name);
                return;
        }
        down(&ioctl_read_sem);
        switch_drive(p);
        /*
         * try to keep an "open" counter here and unlock the door if 1->0.
         */
        msg(DBG_LCK,"open_count: %d -> %d\n",
            p->open_count,p->open_count-1);
        if (p->open_count>-2) /* CDROMEJECT may have been done */
        {
                if (--p->open_count<=0) 
                {
                        p->sbp_first_frame=p->sbp_last_frame=-1;
                        if (p->audio_state!=audio_playing)
                                if (p->f_eject) cc_SpinDown();
                        p->diskstate_flags &= ~cd_size_bit;
                        p->open_count=0; 
#ifdef SAFE_MIXED
                        p->has_data=0;
#endif /* SAFE_MIXED */ 
                }
        }
        up(&ioctl_read_sem);
        return ;
}
/*==========================================================================*/
/*
 *
 */
static int sbpcd_media_changed( struct cdrom_device_info *cdi, int disc_nr);
static struct cdrom_device_ops sbpcd_dops = {
        .open                   = sbpcd_open,
        .release                = sbpcd_release,
        .drive_status           = sbpcd_drive_status,
        .media_changed          = sbpcd_media_changed,
        .tray_move              = sbpcd_tray_move,
        .lock_door              = sbpcd_lock_door,
        .select_speed           = sbpcd_select_speed,
        .get_last_session       = sbpcd_get_last_session,
        .get_mcn                = sbpcd_get_mcn,
        .reset                  = sbpcd_reset,
        .audio_ioctl            = sbpcd_audio_ioctl,
        .capability             = CDC_CLOSE_TRAY | CDC_OPEN_TRAY | CDC_LOCK |
                                CDC_MULTI_SESSION | CDC_MEDIA_CHANGED |
                                CDC_MCN | CDC_PLAY_AUDIO,
        .n_minors               = 1,
};

/*==========================================================================*/
/*
 * accept "kernel command line" parameters 
 * (suggested by Peter MacDonald with SLS 1.03)
 *
 * This is only implemented for the first controller. Should be enough to
 * allow installing with a "strange" distribution kernel.
 *
 * use: tell LILO:
 *                 sbpcd=0x230,SoundBlaster
 *             or
 *                 sbpcd=0x300,LaserMate
 *             or
 *                 sbpcd=0x338,SoundScape
 *             or
 *                 sbpcd=0x2C0,Teac16bit
 *
 * (upper/lower case sensitive here - but all-lowercase is ok!!!).
 *
 * the address value has to be the CDROM PORT ADDRESS -
 * not the soundcard base address.
 * For the SPEA/SoundScape setup, DO NOT specify the "configuration port"
 * address, but the address which is really used for the CDROM (usually 8
 * bytes above).
 *
 */

int sbpcd_setup(char *s)
{
#ifndef MODULE
        int p[4];
        (void)get_options(s, ARRAY_SIZE(p), p);
        setup_done++;
        msg(DBG_INI,"sbpcd_setup called with %04X,%s\n",p[1], s);
        sbpro_type=0; /* default: "LaserMate" */
        if (p[0]>1) sbpro_type=p[2];
        else if (!strcmp(s,str_sb)) sbpro_type=1;
        else if (!strcmp(s,str_sb_l)) sbpro_type=1;
        else if (!strcmp(s,str_sp)) sbpro_type=2;
        else if (!strcmp(s,str_sp_l)) sbpro_type=2;
        else if (!strcmp(s,str_ss)) sbpro_type=2;
        else if (!strcmp(s,str_ss_l)) sbpro_type=2;
        else if (!strcmp(s,str_t16)) sbpro_type=3;
        else if (!strcmp(s,str_t16_l)) sbpro_type=3;
        if (p[0]>0) sbpcd_ioaddr=p[1];
        if (p[0]>2) max_drives=p[3];
#else
        sbpcd_ioaddr = sbpcd[0];
        sbpro_type = sbpcd[1];
#endif
        
        CDo_command=sbpcd_ioaddr;
        CDi_info=sbpcd_ioaddr;
        CDi_status=sbpcd_ioaddr+1;
        CDo_sel_i_d=sbpcd_ioaddr+1;
        CDo_reset=sbpcd_ioaddr+2;
        CDo_enable=sbpcd_ioaddr+3; 
        f_16bit=0;
        if ((sbpro_type==1)||(sbpro_type==3))
        {
                CDi_data=sbpcd_ioaddr;
                if (sbpro_type==3)
                {
                        f_16bit=1;
                        sbpro_type=1;
                }
        }
        else CDi_data=sbpcd_ioaddr+2;

        return 1;
}

__setup("sbpcd=", sbpcd_setup);


/*==========================================================================*/
/*
 * Sequoia S-1000 CD-ROM Interface Configuration
 * as used within SPEA Media FX, Ensonic SoundScape and some Reveal cards
 * The soundcard has to get jumpered for the interface type "Panasonic"
 * (not Sony or Mitsumi) and to get soft-configured for
 *     -> configuration port address
 *     -> CDROM port offset (num_ports): has to be 8 here. Possibly this
 *        offset value determines the interface type (none, Panasonic,
 *        Mitsumi, Sony).
 *        The interface uses a configuration port (0x320, 0x330, 0x340, 0x350)
 *        some bytes below the real CDROM address.
 *         
 *        For the Panasonic style (LaserMate) interface and the configuration
 *        port 0x330, we have to use an offset of 8; so, the real CDROM port
 *        address is 0x338.
 */
static int __init config_spea(void)
{
        /*
         * base address offset between configuration port and CDROM port,
         * this probably defines the interface type
         *   2 (type=??): 0x00
         *   8 (type=LaserMate):0x10
         *  16 (type=??):0x20
         *  32 (type=??):0x30
         */
        int n_ports=0x10;

        int irq_number=0; /* off:0x00, 2/9:0x01, 7:0x03, 12:0x05, 15:0x07 */
        int dma_channel=0; /* off: 0x00, 0:0x08, 1:0x18, 3:0x38, 5:0x58, 6:0x68 */
        int dack_polarity=0; /* L:0x00, H:0x80 */
        int drq_polarity=0x40; /* L:0x00, H:0x40 */
        int i;

#define SPEA_REG_1 sbpcd_ioaddr-0x08+4
#define SPEA_REG_2 sbpcd_ioaddr-0x08+5
        
        OUT(SPEA_REG_1,0xFF);
        i=inb(SPEA_REG_1);
        if (i!=0x0F)
        {
                msg(DBG_SEQ,"no SPEA interface at %04X present.\n", sbpcd_ioaddr);
                return (-1); /* no interface found */
        }
        OUT(SPEA_REG_1,0x04);
        OUT(SPEA_REG_2,0xC0);
        
        OUT(SPEA_REG_1,0x05);
        OUT(SPEA_REG_2,0x10|drq_polarity|dack_polarity);
        
#if 1
#define SPEA_PATTERN 0x80
#else
#define SPEA_PATTERN 0x00
#endif
        OUT(SPEA_REG_1,0x06);
        OUT(SPEA_REG_2,dma_channel|irq_number|SPEA_PATTERN);
        OUT(SPEA_REG_2,dma_channel|irq_number|SPEA_PATTERN);
        
        OUT(SPEA_REG_1,0x09);
        i=(inb(SPEA_REG_2)&0xCF)|n_ports;
        OUT(SPEA_REG_2,i);
        
        sbpro_type = 0; /* acts like a LaserMate interface now */
        msg(DBG_SEQ,"found SoundScape interface at %04X.\n", sbpcd_ioaddr);
        return (0);
}

/*==========================================================================*/
/*
 *  Test for presence of drive and initialize it.
 *  Called once at boot or load time.
 */

/* FIXME: cleanups after failed allocations are too ugly for words */
#ifdef MODULE
int __init __sbpcd_init(void)
#else
int __init sbpcd_init(void)
#endif
{
        int i=0, j=0;
        int addr[2]={1, CDROM_PORT};
        int port_index;

        sti();
        
        msg(DBG_INF,"sbpcd.c %s\n", VERSION);
#ifndef MODULE
#if DISTRIBUTION
        if (!setup_done)
        {
                msg(DBG_INF,"Looking for Matsushita/Panasonic, CreativeLabs, Longshine, TEAC CD-ROM drives\n");
                msg(DBG_INF,"= = = = = = = = = = W A R N I N G = = = = = = = = = =\n");
                msg(DBG_INF,"Auto-Probing can cause a hang (f.e. touching an NE2000 card).\n");
                msg(DBG_INF,"If that happens, you have to reboot and use the\n");
                msg(DBG_INF,"LILO (kernel) command line feature like:\n");
                msg(DBG_INF,"   LILO boot: ... sbpcd=0x230,SoundBlaster\n");
                msg(DBG_INF,"or like:\n");
                msg(DBG_INF,"   LILO boot: ... sbpcd=0x300,LaserMate\n");
                msg(DBG_INF,"or like:\n");
                msg(DBG_INF,"   LILO boot: ... sbpcd=0x338,SoundScape\n");
                msg(DBG_INF,"with your REAL address.\n");
                msg(DBG_INF,"= = = = = = = = = = END of WARNING = = = = = == = = =\n");
        }
#endif /* DISTRIBUTION */
        sbpcd[0]=sbpcd_ioaddr; /* possibly changed by kernel command line */
        sbpcd[1]=sbpro_type; /* possibly changed by kernel command line */
#endif /* MODULE */
        
        for (port_index=0;port_index<NUM_PROBE;port_index+=2)
        {
                addr[1]=sbpcd[port_index];
                if (addr[1]==0) break;
                if (check_region(addr[1],4))
                {
                        msg(DBG_INF,"check_region: %03X is not free.\n",addr[1]);
                        continue;
                }
                if (sbpcd[port_index+1]==2) type=str_sp;
                else if (sbpcd[port_index+1]==1) type=str_sb;
                else if (sbpcd[port_index+1]==3) type=str_t16;
                else type=str_lm;
                sbpcd_setup((char *)type);
#if DISTRIBUTION
                msg(DBG_INF,"Scanning 0x%X (%s)...\n", CDo_command, type);
#endif /* DISTRIBUTION */
                if (sbpcd[port_index+1]==2)
                {
                        i=config_spea();
                        if (i<0) continue;
                }
#ifdef PATH_CHECK
                if (check_card(addr[1])) continue;
#endif /* PATH_CHECK */ 
                i=check_drives();
                msg(DBG_INI,"check_drives done.\n");
                if (i>=0) break; /* drive found */
        } /* end of cycling through the set of possible I/O port addresses */
        
        if (ndrives==0)
        {
                msg(DBG_INF, "No drive found.\n");
#ifdef MODULE
                return -EIO;
#else
                goto init_done;
#endif /* MODULE */
        }
        
        if (port_index>0)
          {
            msg(DBG_INF, "You should read Documentation/cdrom/sbpcd\n");
            msg(DBG_INF, "and then configure sbpcd.h for your hardware.\n");
          }
        check_datarate();
        msg(DBG_INI,"check_datarate done.\n");
        
        for (j=0;j<NR_SBPCD;j++)
        {
                struct sbpcd_drive *p = D_S + j;
                if (p->drv_id==-1)
                        continue;
                switch_drive(p);
#if 1
                if (!famL_drive) cc_DriveReset();
#endif
                if (!st_spinning) cc_SpinUp();
                p->sbp_first_frame = -1;  /* First frame in buffer */
                p->sbp_last_frame = -1;   /* Last frame in buffer  */
                p->sbp_read_frames = 0;   /* Number of frames being read to buffer */
                p->sbp_current = 0;       /* Frame being currently read */
                p->CD_changed=1;
                p->frame_size=CD_FRAMESIZE;
                p->f_eject=0;
#if EJECT
                if (!fam0_drive) p->f_eject=1;
#endif /* EJECT */ 
                cc_ReadStatus();
                i=ResponseStatus();  /* returns orig. status or p_busy_new */
                if (famT_drive) i=ResponseStatus();  /* returns orig. status or p_busy_new */
                if (i<0)
                {
                        if (i!=-402)
                                msg(DBG_INF,"init: ResponseStatus returns %d.\n",i);
                }
                else
                {
                        if (st_check)
                        {
                                i=cc_ReadError();
                                msg(DBG_INI,"init: cc_ReadError returns %d\n",i);
                        }
                }
                msg(DBG_INI,"init: first GetStatus: %d\n",i);
                msg(DBG_LCS,"init: first GetStatus: error_byte=%d\n",
                    p->error_byte);
                if (p->error_byte==aud_12)
                {
                        timeout=jiffies+2*HZ;
                        do
                        {
                                i=GetStatus();
                                msg(DBG_INI,"init: second GetStatus: %02X\n",i);
                                msg(DBG_LCS,
                                    "init: second GetStatus: error_byte=%d\n",
                                    p->error_byte);
                                if (i<0) break;
                                if (!st_caddy_in) break;
                                }
                        while ((!st_diskok)||time_after(jiffies, timeout));
                }
                i=SetSpeed();
                if (i>=0) p->CD_changed=1;
        }

        if (!request_region(CDo_command,4,major_name))
        {
                printk(KERN_WARNING "sbpcd: Unable to request region 0x%x\n", CDo_command);
                return -EIO;
        }

        /*
         * Turn on the CD audio channels.
         * The addresses are obtained from SOUND_BASE (see sbpcd.h).
         */
#if SOUND_BASE
        OUT(MIXER_addr,MIXER_CD_Volume); /* select SB Pro mixer register */
        OUT(MIXER_data,0xCC); /* one nibble per channel, max. value: 0xFF */
#endif /* SOUND_BASE */

        if (register_blkdev(MAJOR_NR, major_name)) {
#ifdef MODULE
                return -EIO;
#else
                goto init_done;
#endif /* MODULE */
        }

        /*
         * init error handling is broken beyond belief in this driver...
         */
        sbpcd_queue = blk_init_queue(do_sbpcd_request, &sbpcd_lock);
        if (!sbpcd_queue) {
                release_region(CDo_command,4);
                unregister_blkdev(MAJOR_NR, major_name);
                return -ENOMEM;
        }

        devfs_mk_dir("sbp");

        for (j=0;j<NR_SBPCD;j++)
        {
                struct cdrom_device_info * sbpcd_infop;
                struct gendisk *disk;
                struct sbpcd_drive *p = D_S + j;

                if (p->drv_id==-1) continue;
                switch_drive(p);
#ifdef SAFE_MIXED
                p->has_data=0;
#endif /* SAFE_MIXED */ 
                /*
                 * allocate memory for the frame buffers
                 */
                p->aud_buf=NULL;
                p->sbp_audsiz=0;
                p->sbp_bufsiz=buffers;
                if (p->drv_type&drv_fam1)
                        if (READ_AUDIO>0)
                                p->sbp_audsiz = READ_AUDIO;
                p->sbp_buf=(u_char *) vmalloc(buffers*CD_FRAMESIZE);
                if (!p->sbp_buf) {
                        msg(DBG_INF,"data buffer (%d frames) not available.\n",
                                buffers);
                        if ((unregister_blkdev(MAJOR_NR, major_name) == -EINVAL))
                        {
                                printk("Can't unregister %s\n", major_name);
                        }
                        release_region(CDo_command,4);
                        blk_cleanup_queue(sbpcd_queue);
                        return -EIO;
                }
#ifdef MODULE
                msg(DBG_INF,"data buffer size: %d frames.\n",buffers);
#endif /* MODULE */
                if (p->sbp_audsiz>0)
                {
                        p->aud_buf=(u_char *) vmalloc(p->sbp_audsiz*CD_FRAMESIZE_RAW);
                        if (p->aud_buf==NULL) msg(DBG_INF,"audio buffer (%d frames) not available.\n",p->sbp_audsiz);
                        else msg(DBG_INF,"audio buffer size: %d frames.\n",p->sbp_audsiz);
                }
                sbpcd_infop = vmalloc(sizeof (struct cdrom_device_info));
                if (sbpcd_infop == NULL)
                {
                        release_region(CDo_command,4);
                        blk_cleanup_queue(sbpcd_queue);
                        return -ENOMEM;
                }
                memset(sbpcd_infop, 0, sizeof(struct cdrom_device_info));
                sbpcd_infop->ops = &sbpcd_dops;
                sbpcd_infop->speed = 2;
                sbpcd_infop->capacity = 1;
                sprintf(sbpcd_infop->name, "sbpcd%d", j);
                sbpcd_infop->handle = p;
                p->sbpcd_infop = sbpcd_infop;
                disk = alloc_disk(1);
                disk->major = MAJOR_NR;
                disk->first_minor = j;
                disk->fops = &sbpcd_bdops;
                strcpy(disk->disk_name, sbpcd_infop->name);
                disk->flags = GENHD_FL_CD;
                sprintf(disk->devfs_name, "sbp/c0t%d", p->drv_id);
                p->disk = disk;
                if (register_cdrom(sbpcd_infop))
                {
                        printk(" sbpcd: Unable to register with Uniform CD-ROm driver\n");
                }
                disk->private_data = p;
                disk->queue = sbpcd_queue;
                add_disk(disk);
        }
        blk_queue_hardsect_size(sbpcd_queue, CD_FRAMESIZE);

#ifndef MODULE
 init_done:
#endif
        return 0;
}
/*==========================================================================*/
#ifdef MODULE
static void sbpcd_exit(void)
{
        int j;
        
        if ((unregister_blkdev(MAJOR_NR, major_name) == -EINVAL))
        {
                msg(DBG_INF, "What's that: can't unregister %s.\n", major_name);
                return;
        }
        release_region(CDo_command,4);
        blk_cleanup_queue(sbpcd_queue);
        for (j=0;j<NR_SBPCD;j++)
        {
                if (D_S[j].drv_id==-1) continue;
                del_gendisk(D_S[j].disk);
                put_disk(D_S[j].disk);
                devfs_remove("sbp/c0t%d", j);
                vfree(D_S[j].sbp_buf);
                if (D_S[j].sbp_audsiz>0)
                        vfree(D_S[j].aud_buf);
                if ((unregister_cdrom(D_S[j].sbpcd_infop) == -EINVAL))
                {
                        msg(DBG_INF, "What's that: can't unregister info %s.\n", major_name);
                        return;
                }
                vfree(D_S[j].sbpcd_infop);
        }
        devfs_remove("sbp");
        msg(DBG_INF, "%s module released.\n", major_name);
}


module_init(__sbpcd_init) /*HACK!*/;
module_exit(sbpcd_exit);


#endif /* MODULE */
static int sbpcd_media_changed(struct cdrom_device_info *cdi, int disc_nr)
{
        struct sbpcd_drive *p = cdi->handle;
        msg(DBG_CHK,"media_check (%s) called\n", cdi->name);
        
        if (p->CD_changed==0xFF)
        {
                p->CD_changed=0;
                msg(DBG_CHK,"medium changed (drive %s)\n", cdi->name);
                current_drive->diskstate_flags &= ~toc_bit;
                /* we *don't* need invalidate here, it's done by caller */
                current_drive->diskstate_flags &= ~cd_size_bit;
#ifdef SAFE_MIXED
                current_drive->has_data=0;
#endif /* SAFE_MIXED */ 

                return (1);
        }
        else
                return (0);
}

MODULE_LICENSE("GPL");
/* FIXME: Old modules.conf claims MATSUSHITA_CDROM2_MAJOR and CDROM3, but
   AFAICT this doesn't support those majors, so why? --RR 30 Jul 2003 */
MODULE_ALIAS_BLOCKDEV_MAJOR(MATSUSHITA_CDROM_MAJOR);

/*==========================================================================*/
/*
 * Overrides for Emacs so that we follow Linus's tabbing style.
 * Emacs will notice this stuff at the end of the file and automatically
 * adjust the settings for this buffer only.  This must remain at the end
 * of the file. 
 * ---------------------------------------------------------------------------
 * Local variables:
 * c-indent-level: 8
 * c-brace-imaginary-offset: 0
 * c-brace-offset: -8
 * c-argdecl-indent: 8
 * c-label-offset: -8
 * c-continued-statement-offset: 8
 * c-continued-brace-offset: 0
 * End:
 */