path: root/sys/i386/isa/matcd/matcd.c

/*matcd.c--------------------------------------------------------------------

	Matsushita(Panasonic) / Creative CD-ROM Driver	(matcd)
	Authored by Frank Durda IV

	Copyright 1994, 1995  Frank Durda IV.  All rights reserved.
	"FDIV" is a trademark of Frank Durda IV.


	Redistribution and use in source and binary forms, with or
	without modification, are permitted provided that the following
	conditions are met:
	1.  Redistributions of source code must retain the above copyright
	    notice positioned at the very beginning of this file without
	    modification, all copyright strings, all related programming
	    codes that display the copyright strings, this list of
	    conditions and the following disclaimer.
	2.  Redistributions in binary form must contain all copyright strings
	    and related programming code that display the copyright strings.
	3.  Redistributions in binary form must reproduce the above copyright
	    notice, this list of conditions and the following disclaimer in
	    the documentation and/or other materials provided with the
	    distribution.
	4.  All advertising materials mentioning features or use of this
	    software must display the following acknowledgement:
		"The Matsushita/Panasonic CD-ROM driver  was developed
		 by Frank Durda IV for use with "FreeBSD" and similar
		 operating systems."
	    "Similar operating systems" includes mainly non-profit oriented
	    systems for research and education, including but not restricted
	    to "NetBSD", "386BSD", and "Mach" (by CMU).  The wording of the
	    acknowledgement (in electronic form or printed text) may not be
	    changed without permission from the author.
	5.  Absolutely no warranty of function, fitness or purpose is made
	    by the author Frank Durda IV.
	6.  Neither the name of the author nor the name "FreeBSD" may
	    be used to endorse or promote products derived from this software
	    without specific prior written permission.
	    (The author can be reached at   bsdmail@nemesis.lonestar.org)
	7.  The product containing this software must meet all of these
	    conditions even if it is unsupported, not a complete system
	    and/or does not contain compiled code.
	8.  These conditions will be in force for the full life of the
	    copyright.
	9.  If all the above conditions are met, modifications to other
	    parts of this file may be freely made, although any person
	    or persons making changes do not receive the right to add their
	    name or names to the copyright strings and notices in this
	    software.  Persons making changes are encouraged to insert edit
	    history in matcd.c and to put your name and details of the
	    change there.
	10. You must have prior written permission from the author to
	    deviate from these terms.

	Vendors who produce product(s) containing this code are encouraged
	(but not required) to provide copies of the finished product(s) to
	the author and to correspond with the author about development
	activity relating to this code.   Donations of development hardware
	and/or software are also welcome.  (This is one of the faster ways
	to get a driver developed for a device.)

 	THIS SOFTWARE IS PROVIDED BY THE DEVELOPER(S) ``AS IS'' AND ANY
 	EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 	IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 	PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE DEVELOPER(S) BE
 	LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
 	OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
 	OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
 	OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 	LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 	NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 	SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.


-----------------------------------------------------------------------------
Dedicated to:	My family, my Grandfather,
		and Max, my Golden Retriever

Thanks to:	Jordon Hubbard (jkh) for getting me ramped-up to 2.x system
		quickly enough to make the 2.1 release.  He put up with
		plenty of silly questions and might get the post of
		ambassador some day.

and 		The people who donated equipment and other material to make
		development of this driver possible.  Donations and
		sponsors for projects are appreciated.


-----No changes are allowed above this line------------------------------------

Edit History - (should be in sync with any source control log entries)

	Never seen one of these before?  Ok, here is how it works.
	Every time you change the code, you increment the edit number,
	that number over there in the <%d> and in the (%d) in the
	version string.  You never set this number lower than it is.
	Near, or preferably on lines that change, insert the edit
	number.  If there is a number there already, you can replace it
	with a newer one.  This makes searches for code changes very fast.

	In the edit history, start with the edit number, and a good
	description of what changes were made.  Then follow it with
	the date, your name and an EMAIL address where you can be reached.

	Please follow this practice; it helps leave understandable code in
	your wake.

	FYI, you have major and minor release codes.  Major releases numbered
	1 thru n.  Major feature additions should get a new major release
	number.  Minor releases start with a null and then letters
	A thru Z.  So  3A(456) is Major release 3, Minor release 1,
	Edit 456 (in Microsoft-ese that would be 03.01.456), and 5(731)
	is Major release 5, Minor release 0, Edit 731.  Typically only the
	author will change the major and minor release codes in small
	projects.

				EDIT edit Edit HISTORY history History

<1>	This initial version is to get basic filesystem I/O working
	using the SoundBlaster 16 interface.  The stand-alone adapter
	card doesn't work yet.
	December 1994  Frank Durda IV	bsdmail@nemesis.lonestar.org

<2>	Corrections to resolve a race condition when multiple drives
	on the same controller was active.  Fixed drive 1 & 2 swap
	problem.  See selectdrive().
	21-Jan-95  Frank Durda IV	bsdmail@nemesis.lonestar.org

<3>	Added automatic probing and support for all Creative Labs sound
	cards with the Creative/Panasonic interface and the stand-alone
	interface adapters.  See AUTOHUNT and FULLCONFIG conditionals
	for more information.
	21-Jan-95  Frank Durda IV	bsdmail@nemesis.lonestar.org

<4>	Rebundled debug conditionals.
	14-Feb-95  Frank Durda IV	bsdmail@nemesis.lonestar.org

<5>	Changes needed to work on FreeBSD 2.1.  Also added draincmd
	since some conditions cause the drive to produce surprise data.
	See setmode and draincmd
	19-Feb-95  Frank Durda IV	bsdmail@nemesis.lonestar.org

<6>	Got rid of some redundant error code by creating chk_error().
	Also built a nice generic bus-lock function.
	20-Feb-95  Frank Durda IV	bsdmail@nemesis.lonestar.org

<7>	Improved comments, general structuring.
	Fixed a problem with disc eject not working if LOCKDRIVE was set.
	Apparently the drive will reject an EJECT command if the drive
	is LOCKED.
	21-Feb-95  Frank Durda IV	bsdmail@nemesis.lonestar.org

Edit number code marking begins here - earlier edits were during development.

<8>	Final device name selected and actually made to compile under
	>2.0. For newer systems, it is "matcd", for older it is "mat".
	24-Feb-95  Frank Durda IV	bsdmail@nemesis.lonestar.org

<9>	Added some additional disk-related ioctl functions that didn't
	make it into earlier versions.
	26-Feb-95  Frank Durda IV	bsdmail@nemesis.lonestar.org

<10>	Updated some conditionals so the code will compile under
	1.1.5.1, although this is not the supported platform.
	Also found that some other devices probe code was changing the
	settings for the port 0x302 debug board, so added code to set it
	to a sane state before we use it.
	26-Feb-95  Frank Durda IV	bsdmail@nemesis.lonestar.org

<11>	The Copyright and Use statement has been replaced in all files
	with a new version.
	1-Mar-95  Frank Durda IV	bsdmail@nemesis.lonestar.org

<12>	Added ioctls having to do with audio volume, routing and playback
	speed.  Also added some code I think is for dynamic loading.
	12-Mar-95  Frank Durda IV	bsdmail@nemesis.lonestar.org

<13>	Added ioctls to return TOC headers and entries.
	19-Mar-95  Frank Durda IV	bsdmail@nemesis.lonestar.org

<14>	More ioctls to finish out general audio support and some clean-up.
	Also fixed a bug in open where CD label information would not
	always be cleared after a disc change.

	Added a check to block attempts to resume audio if already playing.
	The resulting sound is a cross between Kryten and Max Headroom.
	But, if you *want* this "feature", enable #define KRYTEN
	in options.h.

	So it is not BSD-ish enough, eh?  What, too many comments?  :-)
	21-Mar-95  Frank Durda IV	bsdmail@nemesis.lonestar.org

<15>	LOCKDRIVE has been modified so that a new series of minor
	numbers are created.  When these are opened, the selected
	drive will have its door locked and the device must be completely
	closed to unlock the media.  The EJECT ioctl will be refused
	when the drive is locked this way.   This is useful for
	servers and other places where the media needs to remain in the
	drive.  Bit 7 of the minor number controls locking.

	As of this edit, the code compiles with no warnings with -Wall set.
	22-Mar-95  Frank Durda IV	bsdmail@nemesis.lonestar.org

<16>	Added a new check in the probe code that looks for the drive
	interface being in an idle state after issuing a reset.  If this
	isn't the case, then the device at this location isn't a
	Matsushita CD-ROM drive.  This will prevent hangs in draincmd later.
	Added the tray close ioctl.  This required modifications to open
	to allow the character devices to be "partially" opened so that
	the close ioctl could be issued when the open would otherwise fail.
	Close also delays slightly after completing because the drive
	doesn't update its disc and media status instantly.
	Also created the capability ioctl that lets an application find out
	up front what things a drive can do.
	Fixed a global spelling error.
	Changed matcddriver structure to simply say "matcd".  The original
	string "matcd interface " broke the kernel -c boot mechanism.
	Updated the #includes in response to a complaint in first release.
	Updated and tested conditionals so that driver will still compile
	under FreeBSD 1.1.5.1 as well as 2.0 and early 2.1.
	4-Apr-95  Frank Durda IV	bsdmail@nemesis.lonestar.org

<17>	The function matcd_toc_entries which is executed in response to
	the CDIOREADTOCENTRYS ioctl didn't cope with programs that only
	requested part of the TOC.  This change is based on code submitted
	by Doug Robson (dfr@render.com).
	(This change was introduced out of order and exists in FreeBSD
	 2.0.5 without the version stamp being updated.  I.N.M.F.)
	1-Jun-95  Frank Durda IV	bsdmail@nemesis.lonestar.org

<18>	While working on the TEAC CD-ROM driver (teaccd) that is reusing
	chunks of code from this driver, I discovered several functions,
	arrays and other things that should have been declared 'static'.
	These changes are necessary if the TEAC CD-ROM driver is to be
	present at the same time as matcd.
	Also fixed the residual buss vs bus symbols and strings.
	There are no functional code changes in this edit.
	2-May-95  Frank Durda IV	bsdmail@nemesis.lonestar.org

<19>	Creative has changed the Status port slightly in their
	sound boards based on the Vibra-16 (and probably the Vibra-16S)
	chipset.  This change masks some unused bits that were formally
	on all the time and are doing different things in this design.
	The changes are transparent to all other supported boards.
	20-Jun-95  Frank Durda IV	bsdmail@nemesis.lonestar.org

<20>	Code was added to detect non-Creative (SoundBlaster) host
	interfaces, and the driver will  switch to code compatible with the
	detected host interface.  This should add support for MediaVision,
	IBM, Reveal, and other compatible adapters with split
	data/status-ports.  This code allows a mix of SoundBlaster (Type 0)
	and non-SoundBlaster (Type 1) boards in the same system with no
	special configuration.  

	I also updated the attach code to display the interface type and
	changed the host interface probe messages to reflect the "c" for
	controller in controller-specific messages as the existing messages
	were confusing when a second card was in place .  The kernel -c
	tables have been updated accordingly, so you now have a matcdc%d
	controller to change settings on.
	24-Jun-95  Frank Durda IV	bsdmail@nemesis.lonestar.org

<21>	Added interface handling code in two of those "this should not
	happen" routines, draincmd and get_stat.   Since these routines are
	called by functions during probing that may not know what type
	interface is out there, the code assumes that a given adapter is 
	both a type 0 and a type 1 adapter at the same time.  Plus,
	this code gets executed once in a very long time so the cost of
	assuming both host adapter types is not significant.
	4-Jul-95  Frank Durda IV	bsdmail@nemesis.lonestar.org

<22>	Four external interface prototypes were altered by someone else.
	I believe these changes are for making GCC and/or the linker shut-up
	when building some other part of the system since matcd already
	compiles -Wall with no warnings...
	8-Sep-95  Frank Durda IV	bsdmail@nemesis.lonestar.org

<23>	This change implements the ioctls for preventing media removal
	and allowing media removal.
	Currently, these calls will work according to the following rules:
			No "l" devs opened	Any "l" dev open
	CDALLOW		accepted always		rejected always
	CDPREVENT	accepted always		accepted always

	One refinement might be to allow CDALLOW/CDPREVENT to always
	work if UID 0 issued the ioctl, but that will wait for later.

	I also made a change to the information that the toc_entry code
	returns so that xcdplayer won't malfunction.  (It would not play
	the last track on a non-mixed mode audio CD.)  Unlike cdplayer,
	xcdplayer asks for track information one track at a time, and
	calls for information on the lead-out track by its official
	number (0xaa), rather than referring to the "after last" (n+1) track
	as cdplayer does.  Anyway, this change should make both players
	happy. 
	16-Sep-95  Frank Durda IV	bsdmail@nemesis.lonestar.org

<24>	In Edit 15 when the extra devs were created for selective locking,
	the door locking was broken if a non-locking dev on the drive is
	closed.  The problem was caused by not tracking locked devs and
	non-locking devs as being different partitions.   The change is to
	simply use the locking dev bit to flag a set of shadow partitions
	when it comes to lock operations.  All other operations treat the
	locked and unlocked partitions as being identical.
	18-Sep-95  Frank Durda IV	bsdmail@nemesis.lonestar.org

<25>	During work on Edit 23, I noted that on slow and very busy systems,
	sometimes the driver would go to sleep forever.  The problem appears
	to have been a race condition caused by doing separate timeout/sleep
	calls without using SPL first.  The change here is to use tsleep
	which provides the equivalent of timeout/sleep timeout/tsleep if the
	last paremeter is tsleep is set to the time value that would have been
	given to timeout.
	I also fixed some duplicate location strings in the tsleep calls.
	24-Sep-95  Frank Durda IV	bsdmail@nemesis.lonestar.org

<26>	Moved a function declaration that generated two warnings with
	the FULLCONFIG/FULLDRIVER conditionals disabled.
	Updated the igot function so that it correctly reports limited
	functions when a sub-set driver is compiled.
	Eliminated FULLCONFIG conditional and now set controller counts
	based on the NMATCD #define produced by the config process.
	Also, disable the audio-related ioctls based on the BOOTMFS
	conditional to help make the boot floppy kernel smaller.
	18-Oct-95  Frank Durda IV	bsdmail@nemesis.lonestar.org

<27>	Incorporated changes needed to move the cdevsw and bdevsw
	entries into the drivers (including this one). Also
	include a quick first pass cut at DEVFS suppport.

---------------------------------------------------------------------------*/

/*Match this format:		Version_dc(d)__dd-mmm-yy	*/
static char	MATCDVERSION[]="Version  1(26) 18-Oct-95";

/*	The following strings may not be changed*/
static char	MATCDCOPYRIGHT[] = "Matsushita CD-ROM driver, Copr. 1994,1995 Frank Durda IV";
/*	The proceeding strings may not be changed*/

/* $FreeBSD$ */

/*---------------------------------------------------------------------------
	Include declarations
---------------------------------------------------------------------------*/

#include	"matcd.h"
#include	<sys/param.h>
#include	<sys/systm.h>

#include	<sys/buf.h>
#include	<sys/dkbad.h>
#include	<sys/cdio.h>
#include	<sys/disklabel.h>
#include	<sys/file.h>
#include	<sys/ioctl.h>
#include	<sys/proc.h>

#include	"i386/isa/matcd/options.h"	/*Conditional compile options
						  and probe port hints*/
#include	"i386/isa/matcd/matcddrv.h"	/*Drive-related defs & strings*/
#include	"i386/isa/matcd/creative.h"	/*Host interface related defs*/

#include	<sys/conf.h>
#include	<sys/kernel.h>
#ifdef DEVFS
#include	<sys/devfsext.h>
#endif /*DEVFS*/

/*---------------------------------------------------------------------------
	Defines and structures
---------------------------------------------------------------------------*/

#define DRIVESPERC	4		/*This is a constant*/
#define TOTALDRIVES	NUMCTRLRS*DRIVESPERC	/*Max possible drives*/

#define	TICKRES		10		/*Our coarse timer resolution*/
#define ISABUSKHZ	8330		/*Number of IN/OUT ISA/sec*/
#define MAXTRKS		101		/*Maximum possible tracks*/

#define	RAW_DEVICE	46		/*<16>Dev number for raw device*/


#define MATCDBLK	2048		/*Standard block size*/
#define MATCDRBLK	2352		/*Raw and/or DA block size*/
#define	MATCD_RETRYS	5		/*Number of retries for read ops*/
#define	MATCD_READ_1	0x80		/*Read state machine defines*/
#define	MATCD_READ_2	0x90		/*Read state machine defines*/

struct matcd_volinfo {
	unsigned char	type;		/*00 CD-DA or CD-ROM
					  10 CD-I
					  20 XA */
	unsigned char	trk_low;	/*Normally 1*/
	unsigned char	trk_high;	/*Highest track number*/
	unsigned char	vol_msf[3];	/*Size of disc in min/sec/frame*/
};


struct	matcd_mbx {
	short	controller;
	short	ldrive;
	short	partition;
	short	port;
	short	iftype;			/*<20>Host interface type*/
	short	retry;
	short	nblk;
	int	sz;
	u_long	skip;
	struct	buf	*bp;
	int	p_offset;
	short	count;
};

static	struct matcd_data {
	short	drivemode;		/*Last state drive was set to*/
	short	flags;
	short	status;			/*Last audio-related function*/
	int	blksize;
	u_long	disksize;
	short	iobase;
	short	iftype;			/*<20>Host interface type*/
	struct	disklabel dlabel;
	unsigned int	partflags[MAXPARTITIONS];
	unsigned int	openflags;
	struct	matcd_volinfo volinfo;
	struct	matcd_mbx mbx;
	u_char	patch[2];		/*<12>Last known audio routing*/
	u_char	volume[2];		/*<12>Last known volume setting*/
#ifdef DEVFS
	void	*ra_devfs_token;	/* handle for devfs entry */
	void	*rc_devfs_token;
	void	*a_devfs_token;
	void	*c_devfs_token;
	void	*rla_devfs_token;
	void	*rlc_devfs_token;
	void	*la_devfs_token;
	void	*lc_devfs_token;
#endif DEVFS
} matcd_data[TOTALDRIVES];


/*	Bit equates for matcd_data.flags*/

#define	MATCDINIT	0x0001		/*Probe ran on host adapter*/
#define	MATCDLABEL	0x0004		/*Valid TOC exists*/
#define	MATCDLOCK	0x0008		/*<15>Drive door is locked*/
#define	MATCDWARN	0x0020		/*Have reported an open disc change*/


/*	Bit equates for matcd_data.partflags*/

#define	MATCDOPEN	0x0001
#define	MATCDREADRAW	0x0002


/*	Error classes returned by chk_error()*/

#define ERR_RETRY	1		/*A retry might recover this*/
#define ERR_INIT	2		/*A retry certainly will get this*/
#define ERR_FATAL	3		/*This cannot be recovered from*/


static	struct	buf_queue_head request_head[NUMCTRLRS];	/*<18>A queue for each host interface*/
static	int	nextcontroller=0;	/*<18>Number of interface units found*/
static	int	drivepresent=0; 	/*<18>Don't change this - see license*/
static	int	iftype;			/*<20>Probe/Attach i.f. type relay*/

static	unsigned char	if_state[4]={0,0,0,0};	/*<18>State of the host I/F and bus*/

/*	Flags in the if_state array
*/

#define	BUSBUSY	0x01			/*<18>Bus is already busy*/


struct matcd_read2 {
	unsigned char	start_msf[3];
	unsigned char	end_msf[3];
};


/*	This mystery structure is supposed to make dynamic driver
	loading possible.
*/


/*---------------------------------------------------------------------------
	These macros take apart the minor number and yield the
	partition, drive on controller, and controller.
	This must match the settings in /dev/MAKEDEV.
---------------------------------------------------------------------------*/

#define		matcd_partition(dev)	((minor(dev)) & 0x07)
#define		matcd_ldrive(dev)	(((minor(dev)) & 0x78) >> 3)
#define		matcd_cdrive(dev)	(((minor(dev)) & 0x18) >> 3)
#define		matcd_controller(dev)	(((minor(dev)) & 0x60) >> 5)
#ifdef LOCKDRIVE
#define		matcd_lockable(dev)	(((minor(dev)) & 0x80) >> 5)
#endif /*LOCKDRIVE*/




/*---------------------------------------------------------------------------
	Entry points and other connections to/from kernel - see also conf.h
           --- not any more :)
---------------------------------------------------------------------------*/

static	int	matcd_probe(struct isa_device *dev);
static	int	matcd_attach(struct isa_device *dev);
struct	isa_driver	matcddriver={matcd_probe, matcd_attach,
				     "matcdc"};


static d_open_t		matcdopen;
static d_close_t	matcdclose;
static d_ioctl_t	matcdioctl;
static d_psize_t	matcdsize;
static d_strategy_t	matcdstrategy;

#define CDEV_MAJOR 46
#define BDEV_MAJOR 17

static struct cdevsw matcd_cdevsw;
static struct bdevsw matcd_bdevsw = 
	{ matcdopen,	matcdclose,	matcdstrategy,	matcdioctl,	/*17*/
	  nodump,	matcdsize,	0,		"matcd",
	  &matcd_cdevsw,	-1 };

/*---------------------------------------------------------------------------
	Internal function declarations
---------------------------------------------------------------------------*/

static	void	matcd_drvinit(void *unused);
static	void	matcd_start(int controller);
static	void	zero_cmd(char *);
static	void	matcd_pread(int port, int count, unsigned char * data);
static	int	matcd_fastcmd(int port,int ldrive,int cdrive,
			      unsigned char * cp);
static	void	matcd_slowcmd(int port,int ldrive,int cdrive,
			      unsigned char * cp);
static	void	matcd_blockread(int state);
static	void	selectdrive(int port,int drive);
static	void	doreset(int port,int cdrive);
static	int	doprobe(int port,int cdrive);
static	void	lockbus(int controller, int ldrive);
static	void	unlockbus(int controller, int ldrive);
static	int	matcd_volinfo(int ldrive);
static	void	draincmd(int port,int cdrive,int ldrive);
static	int 	get_error(int port, int ldrive, int cdrive);
static	int	chk_error(int errnum);
static	int	msf_to_blk(unsigned char * cd);
#ifdef	FULLDRIVER
static	int	matcd_playtracks(int ldrive, int cdrive, int controller,
				 struct ioc_play_track *pt);
static	int	matcd_playmsf(int ldrive, int cdrive, int controller,
				 struct ioc_play_msf *pt);
static	int	matcd_pause(int ldrive, int cdrive, int controller,
			    int action);
static	int	matcd_stop(int ldrive, int cdrive, int controller);
static	int	matcd_level(int ldrive, int cdrive, int controller,
		            struct ioc_vol * volume, int action);
static	int	matcd_patch(int ldrive, int cdrive, int controller,
		            struct ioc_patch * routing);
static	int	matcd_route(int ldrive, int cdrive, int controller,
		            int command);
static	int	matcd_pitch(int ldrive, int cdrive, int controller,
		            struct ioc_pitch * speed);
#endif /*FULLDRIVER*/
static	int	matcd_toc_header(int ldrive, int cdrive, int controller,
		                 struct ioc_toc_header * toc);
static	int	matcd_toc_entries(int ldrive, int cdrive,
				  int controller,
				  struct ioc_read_toc_entry *ioc_entry);
static	int	matcd_read_subq(int ldrive, int cdrive, int controller,
			        struct ioc_read_subchannel * sqp);
static	int	matcd_igot(struct ioc_capability * sqp);
static	int	waitforit(int timelimit, int state, int port,
			   char * where);
static	int	get_stat(int port, int ldrive);
static	int	media_chk(struct matcd_data *cd,int errnum,
			  int ldrive,int test);
static	int	matcd_eject(int ldrive, int cdrive, int controller);
static	int	matcd_doorclose(int ldrive, int cdrive, int controller);
static	int	matcd_dlock(int ldrive, int cdrive,
			    int controller, int action);
static	int	docmd(char * cmd, int ldrive, int cdrive,
		      int controller, int port);


/*---------------------------------------------------------------------------
	matcdopen - Open the device

	This routine actually gets called every time anybody opens
	any partition on a drive.  But the first call is the one that
	does all the work.

<15>	If LOCKDRIVE is enabled, additional minor number devices allow
<15>	the drive to be locked while being accessed.
---------------------------------------------------------------------------*/
int	matcdopen(dev_t dev, int flags, int fmt,
		  struct proc *p)
{
	int cdrive,ldrive,partition,controller,lock;
	struct matcd_data *cd;
	int	i,z,port;
	unsigned char	cmd[MAXCMDSIZ];

	ldrive=matcd_ldrive(dev);
	cdrive=matcd_cdrive(dev);
	partition=matcd_partition(dev);
	controller=matcd_controller(dev);
	lock=matcd_lockable(dev);
	cd= &matcd_data[ldrive];
	port=cd->iobase;	/*and port#*/

	if (ldrive >= TOTALDRIVES) return(ENXIO);


#ifdef DEBUGOPEN
	printf("matcd%d: Open: dev %x partition %x controller %x flags %x cdrive %x\n",
	       ldrive,(int)dev,partition,controller,cd->flags,
	       matcd_cdrive(dev));
#endif /*DEBUGOPEN*/

	if (!(cd->flags & MATCDINIT)) {	/*Did probe find this drive*/
		return(ENXIO);
	}

	if (!(cd->flags & MATCDLABEL) &&
	    cd->openflags) {		/*Has drive completely closed?*/
		return(ENXIO);		/*No, all partitions must close*/
	}


/*	Now, test to see if the media is ready
*/

	lockbus(controller,ldrive);
	zero_cmd(cmd);
	cmd[0]=NOP;			/*Test drive*/
	matcd_slowcmd(port,ldrive,cdrive,cmd);
	i=waitforit(10*TICKRES,DTEN,port,"matopen");
	z=get_stat(port,ldrive);	/*Read status byte*/
#ifdef DEBUGOPEN
	printf("matcd%d Result of NOP is %x %x\n",ldrive,i,z);
#endif /*DEBUGOPEN*/
	if ((z & MATCD_ST_DSKIN)==0) {	/*Is there a disc in the drive?*/
#ifdef DEBUGOPEN
		printf("matcd%d: No Disc in open\n",ldrive);
#endif /*DEBUGOPEN*/
		unlockbus(controller, ldrive);	/*Release bus lock*/
		cd->flags &= ~MATCDLABEL;	/*<16>Mark label as invalid*/
		if (major(dev)==RAW_DEVICE) {	/*<16>Is the char device?*/
			return(0);		/*<16>Allow Semi open*/
		}
		else {
			return(ENXIO);		/*<16>Normally blow off*/
		}
	}
	if (z & MATCD_ST_ERROR) {		/*Was there an error*/
		i=get_error(port,ldrive,cdrive);/*Find out what it was*/
#ifdef DEBUGOPEN
		printf("matcd%d NOP Error was %x\n",ldrive,i);
#endif /*DEBUGOPEN*/
		if (cd->openflags) {		/*Any parts open?*/
			if (media_chk(cd,i,ldrive,0)) {	/*<14>Was it a disc chg?*/
#ifdef DEBUGOPEN
				printf("matcd%d: Disc change detected i %x z %x\n",
				       ldrive,i,z);
#endif /*DEBUGOPEN*/
				unlockbus(controller, ldrive);	/*Release bus lock*/
				return(ENOTTY);
			}

		} else {
			media_chk(cd,i,ldrive,1);/*<14>Was it a disc chg?*/
						 /*<14>Clear volume info*/
		}
	}
	unlockbus(controller, ldrive);	/*Release bus lock*/

/*	Here we fill in the disklabel structure although most is
	hardcoded.
*/

	if ((cd->flags & MATCDLABEL)==0) {
		bzero(&cd->dlabel,sizeof(struct disklabel));


/*	Now we query the drive for the actual size of the media.
	This is where we find out of there is any media or if the
	media isn't a Mode 1 or Mode 2/XA disc.
	See version information about Mode 2/XA support.
*/
		lockbus(controller,ldrive);
		i=matcdsize(dev);
		unlockbus(controller, ldrive);	/*Release bus lock*/
#ifdef DEBUGOPEN
		printf("matcd%d: Bus unlocked in open\n",ldrive);
#endif /*DEBUGOPEN*/
		if (i < 0) {
			printf("matcd%d: Could not read the disc size\n",ldrive);
			return(ENXIO);
		}			/*matcdsize filled in rest of dlabel*/

/*	Based on the results, fill in the variable entries in the disklabel
*/
		cd->dlabel.d_secsize=cd->blksize;
		cd->dlabel.d_ncylinders=(cd->disksize/100)+1;
		cd->dlabel.d_secperunit=cd->disksize;
		cd->dlabel.d_partitions[0].p_size=cd->disksize;
		cd->dlabel.d_checksum=dkcksum(&cd->dlabel);


/*	Now fill in the hardcoded section
*/
					     /*123456789012345678*/
		strncpy(cd->dlabel.d_typename,"Matsushita CDR ",16);
		strncpy(cd->dlabel.d_packname,"(c) 1994, fdiv ",16);
		cd->dlabel.d_magic=DISKMAGIC;
		cd->dlabel.d_magic2=DISKMAGIC;
		cd->dlabel.d_nsectors=100;
		cd->dlabel.d_secpercyl=100;
		cd->dlabel.d_ntracks=1;
		cd->dlabel.d_interleave=1;
		cd->dlabel.d_rpm=300;
		cd->dlabel.d_npartitions=1;	/*See note below*/
		cd->dlabel.d_partitions[0].p_offset=0;
		cd->dlabel.d_partitions[0].p_fstype=9;
		cd->dlabel.d_flags=D_REMOVABLE;

/*	I originally considered allowing the partition match tracks or
	sessions on the media, but since you are allowed up to 99
	tracks in the RedBook world, this would not fit in with the
	BSD fixed partition count scheme.  So ioctls will be used to shift
	the track to be accessed into partition 1.
*/

		cd->flags |= MATCDLABEL;	/*Mark drive as having TOC*/
	}

#ifdef DEBUGOPEN
	printf("matcd%d open2: partition=%d disksize=%d blksize=%x flags=%x\n",
	       ldrive,partition,(int)cd->disksize,cd->blksize,cd->flags);
#endif /*DEBUGOPEN*/

#ifdef LOCKDRIVE
	if (cd->openflags==0 && lock) {
		zero_cmd(cmd);
		cmd[0]=LOCK;		/*Lock drive*/
		cmd[1]=1;
		docmd(cmd,ldrive,cdrive,controller,port);/*<15>Issue cmd*/
		cd->flags |= MATCDLOCK;	/*<15>Drive is now locked*/
	}
#endif /*LOCKDRIVE*/
	cd->openflags |= (1<<(partition+lock));/*<24>Mark partition open*/

	if (partition==RAW_PART ||
	    (partition < cd->dlabel.d_npartitions &&
	     cd->dlabel.d_partitions[partition].p_fstype != FS_UNUSED)) {
		cd->partflags[partition] |= MATCDOPEN;
		if (partition == RAW_PART) {
			cd->partflags[partition] |= MATCDREADRAW;
		}
#ifdef DEBUGOPEN
		printf("matcd%d: Open is complete - openflags %x\n",
		       ldrive,cd->openflags);
#endif /*DEBUGOPEN*/
		return(0);
	}
#ifdef DEBUGOPEN
	printf("matcd%d: Open FAILED\n",ldrive);
#endif /*DEBUGOPEN*/
	return(ENXIO);
}


/*---------------------------------------------------------------------------
	matcdclose - Close the device

	Close may not do much other than clear some driver settings.
	Note that audio playback will continue.

<15>	If you define LOCKDRIVE, and the drive has been opened using
<15>	one of the locking minor numbers, code in close will unlock
<15>	the drive.
---------------------------------------------------------------------------*/

int matcdclose(dev_t dev, int flags, int fmt,
	       struct proc *p)
{
	int	ldrive,cdrive,port,partition,controller,lock;
	struct matcd_data *cd;
#ifdef LOCKDRIVE
	unsigned char cmd[MAXCMDSIZ];
#endif /*LOCKDRIVE*/

	ldrive=matcd_ldrive(dev);
	cdrive=matcd_cdrive(dev);
	lock=matcd_lockable(dev);
	cd=matcd_data+ldrive;
	port=cd->iobase;		/*and port#*/

	if (ldrive >= TOTALDRIVES)
		return(ENXIO);

	partition = matcd_partition(dev);
	controller=matcd_controller(dev);
#ifdef DEBUGOPEN
	printf("matcd%d: Close partition=%d flags %x openflags %x partflags %x\n",
	       ldrive,partition,cd->flags,cd->openflags,
	       cd->partflags[partition]);
#endif /*DEBUGOPEN*/

	if (!(cd->flags & MATCDINIT))
		return(ENXIO);

	cd->partflags[partition] &= ~(MATCDOPEN|MATCDREADRAW);
	cd->openflags &= ~(1<<(partition+lock));
	if (cd->openflags==0) {			/*<24>Really last close?*/
#ifdef LOCKDRIVE
		if (cd->flags & MATCDLOCK) {	/*<24>Was drive locked?*/
			zero_cmd(cmd);		/*Yes, so unlock it*/
			cmd[0]=LOCK;		/*Unlock drive*/
			docmd(cmd,ldrive,cdrive,controller,port);
		}
#endif /*LOCKDRIVE*/
		cd->flags &= ~(MATCDWARN|MATCDLOCK);
						/*<15>Clear warning flag*/
	}
	return(0);
}


/*---------------------------------------------------------------------------
	matcdstrategy - Accepts I/O requests from kernel for processing

	This routine accepts a read request block pointer (historically
	but somewhat inaccurately called *bp for buffer pointer).
	Various sanity checks are performed on the request.
	When we are happy with the request and the state of the device,
	the request is added to the queue of requests for the interface
	that the drive is connected to.  We support multiple interfaces
	so there are multiple queues.  Once the request is added, we
	call the matcd_start routine to start the device in case it isn't
	doing something already.   All I/O including ioctl requests
	rely on the current request starting the next one before exiting.
---------------------------------------------------------------------------*/

void matcdstrategy(struct buf *bp)
{
	struct matcd_data *cd;
	int s;
	int ldrive,controller;

	ldrive=matcd_ldrive(bp->b_dev);
	controller=matcd_controller(bp->b_dev);
	cd= &matcd_data[ldrive];

#ifdef DEBUGIO
	printf("matcd%d: Strategy: buf=0x%lx, block#=%ld bcount=%ld\n",
		ldrive,(unsigned long)bp,bp->b_blkno,bp->b_bcount);
#endif /*DEBUGIO*/


	if (ldrive >= TOTALDRIVES || bp->b_blkno < 0) {
		printf("matcd%d: Bogus parameters received - kernel may be corrupted\n",ldrive);
		bp->b_error=EINVAL;
		goto bad;
	}

	if (!(cd->flags & MATCDLABEL)) {
		bp->b_error = EIO;
		goto bad;
	}

	if (!(bp->b_flags & B_READ)) {
		bp->b_error = EROFS;
		goto bad;
	}

	if (bp->b_bcount==0)		/*Request is zero-length - all done*/
		goto done;

	if (matcd_partition(bp->b_dev) != RAW_PART) {
		if (bounds_check_with_label(bp,&cd->dlabel,1) <= 0) {
			goto done;
		}
	} else {
		bp->b_pblkno=bp->b_blkno;
		bp->b_resid=0;
	}

	s=splbio();			/*Make sure we don't get intr'ed*/
	tqdisksort(&request_head[controller], bp);/*Add new request (bp) to queue (dp
					  and sort the requests in a way that
					  may not be ideal for CD-ROM media*/


	matcd_start(controller);		/*Ok, with our newly sorted queue,
					  see if we can start an I/O operation
					  right now*/
	splx(s);			/*Return priorities to normal*/
	return;				/*All done*/

bad:	bp->b_flags |= B_ERROR;		/*Request bad in some way*/
done:	bp->b_resid = bp->b_bcount;	/*Show amount of data un read*/
	biodone(bp);			/*Signal we have done all we plan to*/
	return;
}


/*---------------------------------------------------------------------------
	matcd_start - Pull a request from the queue and consider doing it.
---------------------------------------------------------------------------*/

static void matcd_start(int controller)
{
	struct matcd_data *cd;
	struct buf *bp;
	struct partition *p;
	int part,ldrive;

	bp = TAILQ_FIRST(&request_head[controller]);
	if (bp == NULL) {	/*Nothing on read queue to do?*/
		wakeup((caddr_t)&matcd_data->status);	/*Wakeup any blocked*/
		return;					/* opens, ioctls, etc*/
	}

	ldrive=matcd_ldrive(bp->b_dev);	/*Get logical drive#*/
	cd=&matcd_data[ldrive];		/*Get pointer to data for this drive*/
#ifdef DEBUGIO
	printf("matcd%d: In start controller %d\n",ldrive,controller);
#endif	/*DEBUGIO*/

	if (if_state[controller] & BUSBUSY) {
#ifdef DEBUGIO
		printf("matcd%d: Dropping thread in start,  controller %d\n",
	       		ldrive,controller);
#endif	/*DEBUGIO*/
		return;
	}

/*	Ok, the controller is idle (not necessarily the drive) and so
	get the command to do and issue it
*/

	TAILQ_REMOVE(&request_head[controller], bp, b_act);

	part=matcd_partition(bp->b_dev);
	p=cd->dlabel.d_partitions + part;

	if_state[controller] |= BUSBUSY;/*<18>Mark bus as busy*/
	cd->mbx.ldrive=ldrive;		/*Save current logical drive*/
	cd->mbx.controller=controller;	/*and controller*/
	cd->mbx.partition=part;		/*and partition (2048 vs 2532)*/
	cd->mbx.port=cd->iobase;	/*and port#*/
	cd->mbx.iftype=cd->iftype;	/*<20>interface type*/
	cd->mbx.retry=MATCD_RETRYS;	/*and the retry count*/
	cd->mbx.bp=bp;			/*and the bp*/
	cd->mbx.p_offset=p->p_offset;	/*and where the data will go*/
	matcd_blockread(MATCD_READ_1+ldrive);	/*Actually start the read*/
	return;				/*Dropping thread.  matcd_blockread
					  must have scheduled a timeout or
					  we will go to sleep forever*/
}


/*---------------------------------------------------------------------------
	matcdioctl - Process things that aren't block reads

	In this driver, ioctls are used mainly to change
	the mode the drive is running in, play audio and other
	things that don't fit into the block read scheme of things.
---------------------------------------------------------------------------*/

int matcdioctl(dev_t dev, int command, caddr_t addr,
	       int flags, struct proc *p)
{
	struct	matcd_data *cd;
	int	ldrive,cdrive,partition;
	int	port, controller;
#ifdef DEBUGIOCTL
	int	i;
#endif	/*DEBUGIOCTL*/

	ldrive=matcd_ldrive(dev);
	cdrive=matcd_cdrive(dev);
	partition=matcd_partition(dev);
	controller=ldrive>>2;
	cd = &matcd_data[ldrive];
	port=cd->iobase;

#ifdef DEBUGIOCTL
	printf("matcd%d: ioctl %x cdrive %x parms ",ldrive,command,cdrive);
	for (i=0;i<10;i++) {
		printf("%02x ",(unsigned int)addr[i]);
	}
	printf("  flags %x\n",cd->flags);
#endif	/*DEBUGIOCTL*/

	if (command==CDIOCCLOSE)	/*<16>Allow close if door open*/
		return(matcd_doorclose(ldrive, cdrive, controller));

	if (!(cd->flags & MATCDLABEL))	/*Did we read TOC OK?*/
		return(EIO);		/*<16>then drive really isn't ready*/

	switch(command) {
	case	DIOCSBAD:
		return(EINVAL);

	case	DIOCGDINFO:
		*(struct disklabel *) addr = cd->dlabel;
		return(0);

	case	DIOCGPART:
		((struct partinfo *) addr)->disklab=&cd->dlabel;
		((struct partinfo *) addr)->part=
		    &cd->dlabel.d_partitions[matcd_partition(dev)];
		return(0);

	case	DIOCWDINFO:
	case	DIOCSDINFO:
		if ((flags & FWRITE) == 0) {
			return(EBADF);
		}
		else {
			return setdisklabel(&cd->dlabel,
				            (struct disklabel *) addr, 0);
		}
	case	DIOCWLABEL:
		return(EBADF);

	case	CDIOCEJECT:
		return(matcd_eject(ldrive, cdrive, controller));

	case	CDIOCALLOW:
		return(matcd_dlock(ldrive, cdrive,
		       controller,0));

	case	CDIOCPREVENT:
		return(matcd_dlock(ldrive, cdrive,
		       controller, MATCDLOCK));

#ifdef FULLDRIVER
	case	CDIOCPLAYTRACKS:
		return(matcd_playtracks(ldrive, cdrive, controller,
		       (struct ioc_play_track *) addr));

	case	CDIOCPLAYMSF:
		return(matcd_playmsf(ldrive, cdrive, controller,
		       (struct ioc_play_msf *) addr));

	case	CDIOCRESUME:
		return(matcd_pause(ldrive, cdrive, controller,RESUME));

	case	CDIOCPAUSE:
		return(matcd_pause(ldrive, cdrive, controller,0));

	case	CDIOCSTOP:
		return(matcd_stop(ldrive, cdrive, controller));

	case	CDIOCGETVOL:
	case	CDIOCSETVOL:
		return(matcd_level(ldrive, cdrive, controller,
		       (struct ioc_vol *) addr, command));

	case	CDIOCSETMONO:		/*<12>This drive can't do mono*/
		return(EINVAL);		/*<12>but it looks like it should*/

					/*<12>SRC OUT	SRC OUT*/
	case	CDIOCSETSTEREO:		/*<12>0 -> L	1 -> R*/
	case	CDIOCSETMUTE:		/*<12>0 -> NULL	1 -> NULL*/
	case	CDIOCSETLEFT:		/*<12>0 -> L&R	1 -> NULL*/
	case	CDIOCSETRIGHT:		/*<12>0 -> NULL	1 -> L&R*/
					/*<12>Adjust audio routing*/
		return(matcd_route(ldrive, cdrive, controller,
		       command));

	case	CDIOCSETPATCH:		/*<12>Allow precise routing*/
		return(matcd_patch(ldrive, cdrive, controller,
		       (struct ioc_patch *) addr));

	case	CDIOCPITCH:		/*<12>Adjust playback speed*/
		return(matcd_pitch(ldrive, cdrive, controller,
		       (struct ioc_pitch *) addr));

	case	CDIOCSTART:		/*<12>Only reason this isn't*/
		return(EINVAL);		/*<12>implemented is I can't find out*/
					/*<12>what it should do!*/
#endif	/*FULLDRIVER*/

	case	CDIOREADTOCHEADER:
		return(matcd_toc_header(ldrive, cdrive, controller,
		       (struct ioc_toc_header *) addr));

	case	CDIOREADTOCENTRYS:
		return(matcd_toc_entries(ldrive, cdrive, controller,
		       (struct ioc_read_toc_entry *) addr));

	case	CDIOCREADSUBCHANNEL:
		return(matcd_read_subq(ldrive, cdrive, controller,
		       (struct ioc_read_subchannel *) addr));

	case	CDIOCCAPABILITY:	/*<16>Request drive/driver capability*/
		return(matcd_igot((struct ioc_capability *) addr));

	case	CDIOCRESET:		/*<12>There is no way to hard reset*/
		return(EINVAL);		/*<12>just one drive*/

	default:
		return(ENOTTY);
	}
}

/*---------------------------------------------------------------------------
	matcdsize - Reports how many blocks exist on the disc.
---------------------------------------------------------------------------*/

int	matcdsize(dev_t dev)
{
	int	size,blksize;
	int	ldrive,part;
	struct	matcd_data *cd;

	ldrive=matcd_ldrive(dev);
	part=matcd_partition(dev);
	if (part==RAW_PART)
		blksize=MATCDRBLK;	/*2352*/
	else
		blksize=MATCDBLK;	/*2048*/

	cd = &matcd_data[ldrive];

	if (matcd_volinfo(ldrive) >= 0) {
		cd->blksize=blksize;
		size=msf_to_blk((char * )&cd->volinfo.vol_msf);

		cd->disksize=size*(blksize/DEV_BSIZE);
#ifdef DEBUGOPEN
	printf("matcd%d: Media size %d\n",ldrive,size);
#endif /*DEBUGOPEN*/
		return(0);
	}
	return(-1);
}

/*---------------------------------------------------------------------------
	matcd_probe - Search for host interface/adapters

	The probe routine hunts for the first drive on the interface since
	there is no way to locate just the adapter.   It also resets the
	entire drive chain while it is there.  matcd_attach() takes care of
	the rest of the initialization.

	The probe routine can be compiled two ways.  In AUTOHUNT mode,
	the kernel config file can say "port?" and we will check all ports
	listed in the port_hint array (see above).

	Without AUTOHUNT set, the config file must list a specific port
	address to check.

	Note that specifying the explicit addresses makes boot-up a lot
	faster.

	The probe will locate Panasonic/Creative interface on the following
	Creative adapter boards:
		#1330A	Sound Blaster PRO
		#1730	Sound Blaster 16
		#1740	Sound Blaster 16 (cost reduced)
		#2230	Sound Blaster 16 (cost reduced)
		#2770	Sound Blaster 16 Value (cost reduced)
		#1810	omniCD upgrade kit adapter card (stand-alone CD)
		#3100	PhoneBlaster SB16 + Sierra 14.4K modem combo
	Creative releases a newer and cheaper-to-make Sound Blaster
	board every few months, so by the original release date of this
	software, there are probably 8 different board models called
	Sound Blaster 16.  These include "Vibra", "Value", etc.

	Please report additional part numbers and board descriptions
	and new port numbers that work to the author.

---------------------------------------------------------------------------*/

static int
matcd_probe(struct isa_device *dev)
{
	int	i,cdrive;
	unsigned char	y;
	int port = dev->id_iobase;	/*Take port hint from config file*/

	cdrive=nextcontroller;		/*Controller defined by pass for now*/
	if (nextcontroller==NUMCTRLRS) {
		printf("matcdc%d: - Too many interfaces specified in config\n",
		       nextcontroller);
		return(0);
	}
	if (nextcontroller==0) {	/*Very first time to be called*/
		for (i=0; i<TOTALDRIVES; i++) {
			matcd_data[i].drivemode=MODE_UNKNOWN;
			matcd_data[i].flags=0;
		}
	}

	i=nextcontroller*DRIVESPERC;	/*Precompute controller offset*/
	for (y=0; y<DRIVESPERC; y++) {
		matcd_data[i+y].flags=0;
	}

#ifdef DEBUGPROBE
	printf("matcdc%d: In probe i %d y %d port %x\n",
	       nextcontroller,i,y,port);
#endif /*DEBUGPROBE*/
#ifdef AUTOHUNT
#ifdef DEBUGPROBE
	printf("matcd%d: size of port_hints %d\n",
	       nextcontroller,sizeof(port_hints));
#endif /*DEBUGPROBE*/
	if (port==-1) {
		for(i=0;i<(sizeof(port_hints)/sizeof(short));i++) {
			port=port_hints[i];
#ifdef DEBUGPROBE
	printf("matcdc%d: Port hint %x\n",nextcontroller,port);
#endif /*DEBUGPROBE*/
			if (port==-1) {
				dev->id_iobase=-1;	/*Put port ? back*/
				return(0);/*Nothing left to try*/
			}
			if (port!=0) {	/*Untested port found*/
				dev->id_iobase=port;
				port_hints[i]=0;/*Don't use that port again*/
				if (doprobe(port,cdrive)==0) return(NUMPORTS);
			}
		}
		dev->id_iobase=-1;	/*Put port ? back as it was*/
		return(0);		/*Interface not found*/

	} else {			/*Config specified a port*/
		i=0;			/*so eliminate it from the hint list*/
		for(i=0;;i++) {		/*or we might try to assign it again*/
			if (port_hints[i]== -1) break;	/*End of list*/
			if (port_hints[i]==port) {
				port_hints[i]=0;	/*Clear duplicate*/
				break;
			}
		}
		if (doprobe(port,cdrive)==0) return(NUMPORTS);
		else return(0);
	}
#else /*AUTOHUNT*/
	if (port==-1) {
		printf("matcdc%d: AUTOHUNT disabled but port? specified in config\n",
		       nextcontroller);
		return(0);
	}
	if (doprobe(port,cdrive)==0) return(NUMPORTS);
	else return(0);
#endif /*AUTOHUNT*/
}

/*---------------------------------------------------------------------------
	doprobe - Common probe code that actually checks the ports we
		have decided to test.

<20>	Edit 20 changes adds code to determine if the host interface
	is one that behaves like the Creative SoundBlaster cards,
	or whether the host interface like those used by some boards
	made by Media Vision and a version known as Lasermate.
---------------------------------------------------------------------------*/

int doprobe(int port,int cdrive)
{
	unsigned char cmd[MAXCMDSIZ];
	int i;

#ifdef RESETONBOOT
	doreset(port,cdrive);		/*Reset what might be our device*/
#endif /*RESETONBOOT*/
	outb(port+PHASE,0);		/*<16>Guarantee status phase*/
	zero_cmd(cmd);
	cmd[0]=NOP;			/*A reasonably harmless command.
				  	  This command will fail after
				  	  power-up or after reset. That's OK*/
#ifdef RESETONBOOT
	if (((inb(port+STATUS) & (DTEN|STEN)) != (DTEN|STEN)) ||
	    (inb(port+DATA) != 0xff))
		return(-1);		/*<20>Something detected but it isn't
					      the device we wanted*/
#endif /*RESETONBOOT*/
	if (matcd_fastcmd(port,0,0,cmd)==0) {/*Issue command*/
		outb(port+PHASE,1);	/*<20>Switch to Creative Data phase*/
		i=inb(port+CMD);	/*<20>Read a byte in data phase*/
		outb(port+PHASE,0);	/*<20>Switch to Creative Status phase*/
		if ((inb(port+STATUS) & (DTEN|STEN))
		    == (DTEN|STEN)) {	/*<20>Drive went idle*/
			iftype=1;	/*<20>It is not a Creative interface.*/
		} else {		/*<20>Status byte still available*/
			iftype=0;
			inb(port+CMD);	/*<20>Read status byte*/
		}
#ifdef DEBUGPROBE
		printf("matcdc%d: Probe found something\n",nextcontroller);
#endif /*DEBUGPROBE*/
/*------Don't change anything below this line - see license -----------------*/
		if (drivepresent==0) {	/*Don't change*/
			printf("matcd - Matsushita (Panasonic) CD-ROM Driver by FDIV, %s\n",
					/*Don't change*/
		               MATCDVERSION); /*Don't change*/
			drivepresent++;	/*Don't change*/
			if (drivepresent==0) /*Don't change - make LINT happy*/
				printf("%s\n",MATCDCOPYRIGHT); /*Don't change*/
		}			/*Don't change*/
/*------Don't change anything above this line - see license -----------------*/
		return(0);		/*Drive 0 detected*/
	}
#ifdef DEBUGPROBE
	printf("matcdc%d: Probe DID NOT find something\n",nextcontroller);
#endif /*DEBUGPROBE*/
	return(1);
}


/*---------------------------------------------------------------------------
	matcd_attach - Locates drives on the adapters that were located.
		If we got here, we located an interface and at least one
		drive.  Now we figure out how many drives are under that
		interface.  The Panasonic interface is too simple to call
		it a controller, but in the existing PDP model, that is
		what it would be.
---------------------------------------------------------------------------*/

static int
matcd_attach(struct isa_device *dev)
{
	int	i;
	unsigned int	z,cdrive;
	unsigned char cmd[MAXCMDSIZ];
	unsigned char data[12];
	struct matcd_data *cd;
	int port = dev->id_iobase;	/*Take port ID selected in probe()*/

#ifdef DEBUGPROBE
	printf("matcdc: Attach dev %x id_unit %d\n",
	       (unsigned int)dev,dev->id_unit);
#endif /*DEBUGPROBE*/
	printf("matcdc%d Host interface type %d\n",
		nextcontroller,iftype);
	TAILQ_INIT(&request_head[nextcontroller]);
	for (cdrive=0; cdrive<4; cdrive++) {	/*We're hunting drives...*/
		zero_cmd(cmd);
		cmd[0]=NOP;		/*A reasonably harmless command.
					  This command will fail after
					  power-up or after reset. It's OK*/
		i=cdrive+(DRIVESPERC*nextcontroller);
		if (matcd_fastcmd(port,i,cdrive,cmd)==0) {	/*Issue cmd*/
			z=get_stat(port,cdrive);/*Read status byte*/
			if ((z & MATCD_ST_ERROR)) {	/*If there was an error,
						  we must ask for error info
						  or subsequent cmds fail*/
				zero_cmd(cmd);
				cmd[0]=READERROR;	/*Inquire*/
				matcd_fastcmd(port,i,cdrive,cmd);
				matcd_pread(port,8,data);/*Read data returned*/
				z=get_stat(port,i);/*Read status byte*/
#ifdef DEBUGPROBE
				printf("matcd%d: Status byte %x ",i,z);
#endif /*DEBUGPROBE*/
			}
			zero_cmd(cmd);
			cmd[0]=READID;	/*Get drive ID*/
			matcd_fastcmd(port,i,cdrive,cmd);
			matcd_pread(port,10,data);/*Read Drive Parm*/
			get_stat(port,i);	/*Read and toss status byte*/
			data[10]=0;	/*Build ASCIZ string*/
			printf("matcd%d: [%s]  ",i,data);
			cd=&matcd_data[i];
			cd->flags |= MATCDINIT;
			cd->iobase=dev->id_iobase;
			cd->iftype=iftype;
			cd->openflags=0;
			cd->volume[0]=cd->volume[1]=DEFVOL;
					/*<12>Match volume drive resets to*/
			cd->patch[0]=0x01;	/*<12>Channel 0 to Left*/
			cd->patch[1]=0x02;	/*<12>Channel 1 to Right*/
			cd->status=CD_AS_NO_STATUS;
			for (i=0; i<MAXPARTITIONS; i++) {
				cd->partflags[i]=0;
			}
#ifdef DEVFS
			cd->ra_devfs_token = devfs_add_devswf(&matcd_cdevsw,
				dkmakeminor(i, 0, 0), DV_CHR,
				UID_ROOT, GID_OPERATOR, 0640, "rmatcd%da", i);
			cd->rc_devfs_token = devfs_add_devswf(&matcd_cdevsw,
				dkmakeminor(i, 0, RAW_PART), DV_CHR,
				UID_ROOT, GID_OPERATOR, 0640, "rmatcd%dc", i);
			cd->a_devfs_token = devfs_add_devswf(&matcd_bdevsw,
				dkmakeminor(i, 0, 0), DV_BLK,
				UID_ROOT, GID_OPERATOR, 0640, "matcd%da", i);
			cd->c_devfs_token = devfs_add_devswf(&matcd_bdevsw,
				dkmakeminor(i, 0, RAW_PART), DV_BLK,
				UID_ROOT, GID_OPERATOR, 0640, "matcd%dc", i);
			cd->rla_devfs_token = devfs_add_devswf(&matcd_cdevsw,
				0x80 | dkmakeminor(i, 0, 0), DV_CHR,
				UID_ROOT, GID_OPERATOR, 0640, "rmatcd%dla", i);
			cd->rlc_devfs_token = devfs_add_devswf(&matcd_cdevsw,
				0x80 | dkmakeminor(i, 0, RAW_PART), DV_CHR,
				UID_ROOT, GID_OPERATOR, 0640, "rmatcd%dc", i);
			cd->la_devfs_token = devfs_add_devswf(&matcd_bdevsw,
				0x80 | dkmakeminor(i, 0, 0), DV_BLK,
				UID_ROOT, GID_OPERATOR, 0640, "matcd%dla", i);
			cd->lc_devfs_token = devfs_add_devswf(&matcd_bdevsw,
				0x80 | dkmakeminor(i, 0, RAW_PART), DV_BLK,
				UID_ROOT, GID_OPERATOR, 0640, "matcd%dlc", i);
#endif
		}
	}
	nextcontroller++;		/*Bump ctlr assign to next number*/
	printf("\n");			/*End line of drive reports*/

	return(1);
}


/*---------------------------------------------------------------------------
	zero_cmd - Initialize command buffer
---------------------------------------------------------------------------*/

void zero_cmd(char * lcmd)
{
	int	i;

	for (i=0; i<MAXCMDSIZ; lcmd[i++]=0);
	return;
}


/*---------------------------------------------------------------------------
	doreset - Resets all the drives connected to a interface
---------------------------------------------------------------------------*/

void doreset(int port,int cdrive)
{
	register int	i,z;
	outb(port+RESET,0);		/*Reset what might be our device*/
					/*Although this ensures a known
					  state, it does close the drive
					  door (if open) and aborts any
					  audio playback in progress. */
	for (i=0;i<(125*ISABUSKHZ);i++){/*DELAY 500msec minimum. Worst
					  case is door open and none or
					  unreadable media */
		z=inb(port+CMD);	/*This makes the loop run at a
					  known speed.  This value is ok
					  for 8.33MHz bus*/
	}
	for (i=0;i<4;i++) {
		matcd_data[(cdrive*4)+i].drivemode=MODE_UNKNOWN;
	}
	return;
}


/*---------------------------------------------------------------------------
	matcd_fastcmd - Send a command to a drive

	This routine executed commands that return instantly (or reasonably
	quick), such as RESET, NOP, READ ERROR, etc.  The only difference
	between it and handling for slower commands, is the slower commands
	will invoke a timeout/sleep if they don't get an instant response.

	Fastcmd is mainly used in probe(), attach() and error related
	functions.  Every attempt should be made to NOT use this
	function for any command that might be executed when the system
	is up.
---------------------------------------------------------------------------*/

int matcd_fastcmd(int port,int ldrive,int cdrive,unsigned char * cp)
{
	unsigned int	i;
	unsigned char	z;
	int	level;
#ifdef DEBUGCMD
	unsigned char *cx;
#endif /*DEBUGCMD*/



	draincmd(port,cdrive,ldrive);	/*Make sure bus is really idle*/
#ifdef DEBUGCMD
	cx=cp;
	printf("matcd%d: Fast Send port %x sel %d command %x %x %x %x %x %x %x\n",
	       ldrive,port,cdrive,cx[0],cx[1],cx[2],cx[3],cx[4],cx[5],cx[6]);
#endif	/*DEBUGCMD*/
	selectdrive(port,cdrive);	/*Enable the desired target drive*/
	level=splhigh();	/*----------------------------------------*/
	for (i=0; i<7; i++) {		/*The seven bytes of the command*/
		outb(port+CMD,*cp++);	/*must be sent within 10msec or*/
	}				/*the drive will ignore the cmd*/
	splx(level);	/*------------------------------------------------*/

/*	Now we wait a maximum of 240msec for a response.
	Only in a few rare cases does it take this long.
	If it is longer, the command should probably be slept on
	rather than increasing the timing value
*/

	for (i=0; i<(60*ISABUSKHZ); i++) {
		z = (inb(port+STATUS)) & (DTEN|STEN);
		if (z != (DTEN|STEN)) break;
	}

/*	We are now either in a data or status phase, OR we timed-out.*/

	if (z == (DTEN|STEN)) {
#ifdef DEBUGCMD
		printf("matcd%d: Command time-out\n",ldrive);
#endif /*DEBUGCMD*/
		return(-1);
	}
	if (z != DTEN) {
		return(1);
	}
	return(0);
}


/*---------------------------------------------------------------------------
	matcd_slowcmd - Issue a command to the drive

	This routine is for commands that might take a long time, such
	as a read or seek.  The caller must determine if the command
	completes instantly or schedule a poll later on.
---------------------------------------------------------------------------*/

void matcd_slowcmd(int port,int ldrive,int cdrive,unsigned char * cp)
{
	unsigned int	i;
	int	level,size;
#ifdef DEBUGCMD
	unsigned char *cx;
#endif /*DEBUGCMD*/


	draincmd(port,cdrive,ldrive);	/*Make sure bus is really idle*/

#ifdef DEBUGCMD
	cx=cp;
	printf("matcd%d: Slow Send port %x sel %d command %x %x %x %x %x %x %x\n",
	       ldrive,port,cdrive,cx[0],cx[1],cx[2],cx[3],cx[4],cx[5],cx[6]);
#endif	/*DEBUGCMD*/
	selectdrive(port,cdrive);	/*Enable the desired target drive*/
	if (*cp==ABORT) size=1;
	else size=7;
	level=splhigh();	/*----------------------------------------*/
	for (i=0; i<size; i++) {	/*The seven bytes of the command*/
		outb(port+CMD,*cp++);	/*must be sent within 10msec or*/
	}				/*the drive will ignore the cmd*/
	splx(level);	/*------------------------------------------------*/
	return;
}


/*---------------------------------------------------------------------------
	draincmd - Makes certain the bus is idle and throws away
		any residual data from the drive if there is any.
		Called as preface to most commands.
		Added in Edit 5.

		This was added because switching drive modes causes
		the drive to emit buffers that were meant to be sent
		to the D-to-A to be sent to the host.  See setmode.
---------------------------------------------------------------------------*/
void draincmd(int port,int cdrive,int ldrive)
{
	int i,z;

	i=inb(port+STATUS);
	if ((i & (DTEN|STEN)) == (DTEN|STEN)) return;

	printf("matcd%d: in draincmd: bus not idle %x - trying to fix\n",
	       ldrive,inb(port+STATUS));
	if ((i & (DTEN|STEN)) == STEN) {
#ifdef DEBUGCMD
		printf("matcd%d: Data present READING - ",ldrive);
#endif /*DEBUGCMD*/
		i=0;
		outb(port+PHASE,1);	/*<16>Enable data read*/
		while ((inb(port+STATUS) & (DTEN|STEN)) == STEN) {
			inb(port+DATA);		/*<21>Ok for Creative*/
			inb(port+ALTDATA);	/*<21>Ok for others*/
			i++;
		}
		outb(port+PHASE,0);
#ifdef DEBUGCMD
		printf("%d bytes read\n",i);
#endif /*DEBUGCMD*/
	}
#ifdef DEBUGCMD
	printf("matcd%d: Now read status: ",ldrive);
#endif /*DEBUGCMD*/
	i=get_stat(port,ldrive);	/*Read status byte*/
	z=inb(port+STATUS);		/*Read bus status*/
#ifdef DEBUGCMD
	printf("Data byte %x and status is now %x\n",i,z);
#endif /*DEBUGCMD*/
	if ((z & (DTEN|STEN)) != (DTEN|STEN)) {
		printf("matcd%d: Bus not idle %x - resetting\n",
		       cdrive,inb(port+STATUS));
		doreset(port,cdrive);
	}
	return;
}


/*---------------------------------------------------------------------------
	selectdrive - Swaps drive select bits

	On Creative SB/SB16/stand-alone adapters, possibly to make them
	hard to reverse engineer, the drive select signals are swapped.
---------------------------------------------------------------------------*/

void selectdrive(int port,int drive)
{
	switch(drive) {
	case 0:				/*0x00 -> 0x00*/
		outb(port+SELECT,CRDRIVE0);
		break;
	case 1:				/*0x01 -> 0x02*/
		outb(port+SELECT,CRDRIVE1);
		break;
	case 2:				/*0x02 -> 0x01*/
		outb(port+SELECT,CRDRIVE2);
		break;
	case 3:				/*0x03 -> 0x03*/
		outb(port+SELECT,CRDRIVE3);
		break;
	}
	return;
}


/*---------------------------------------------------------------------------
	matcd_pread - Read small blocks of control data from a drive
---------------------------------------------------------------------------*/

void matcd_pread(int port, int count, unsigned char * data)
{
	int	i;

	for (i=0; i<count; i++) {
		*data++ = inb(port+CMD);
	}
	return;
}


/*---------------------------------------------------------------------------
	matcd_setmode - Configures disc to run in the desired data mode

	This routine assumes the drive is already idle.

NOTE -	Undocumented action of hardware:  If you change (or reaffirm) data
	modes with MODESELECT + BLOCKPARAM immediately after a command was
	issued that aborted a DA play operation, the drive will unexpectedly
	return 2532 bytes of data in a data phase on the first or second
	subsequent command.

	Original Symptom: drive will refuse to go idle after reading data
	and status expected for a command.  State mechanics for this are
	not fully understood.
---------------------------------------------------------------------------*/

static int
matcd_setmode(int ldrive, int mode)
{
	struct	matcd_data *cd;
	int retries;
	int i,port,cdrive;
	unsigned char cmd[MAXCMDSIZ];

	cd = matcd_data + ldrive;
	retries=3;
	cdrive=ldrive&0x03;
	port=cd->iobase;
	if (cd->drivemode==mode) {
		return(0);		/*Drive already set*/
	}

/*	The drive is not in the right mode, so we need to set it.
*/

	zero_cmd(cmd);
	cmd[0]=MODESELECT;		/*Set drive transfer modes*/
/*	cmd[1]=BLOCKPARAM;		  BLOCKPARAM==0*/
	cmd[2]=mode;
	switch(mode) {
	case MODE_DATA:
		cmd[3]=0x08;		/*2048 bytes*/
		break;
	case MODE_USER:
		cmd[3]=0x09;		/*2352 bytes*/
		cmd[4]=0x30;
		break;
	case MODE_DA:
		cmd[3]=0x09;		/*2352 bytes*/
		cmd[4]=0x30;
		break;
	}
	i=0;
	while(retries-- > 0) {
		i=matcd_fastcmd(port,ldrive,cdrive,cmd);
		get_stat(port,ldrive);	/*Read and toss status byte*/
		if (i==0) {
			cd->drivemode=mode;	/*Set new mode*/
			return(i);
		}
		get_error(port,ldrive,cdrive);
	}
	cd->drivemode=MODE_UNKNOWN;	/*We failed*/
	return(i);
}


/*---------------------------------------------------------------------------
	matcd_volinfo - Read information from disc Table of Contents
---------------------------------------------------------------------------*/

static	int	matcd_volinfo(int ldrive)
{
	struct	matcd_data *cd;
	int	port,i;
	int	z,cdrive;
	int	retry;
	unsigned char cmd[MAXCMDSIZ];
	unsigned char data[12];

	retry=10;			/*<16>This may take a long time*/
	cd = &matcd_data[ldrive];
	cdrive=ldrive&0x03;
	port=cd->iobase;

#ifdef DEBUGOPEN
	printf("matcd%d: In volinfo, port %x\n",ldrive,port);
#endif /*DEBUGOPEN*/

	while(retry>0) {
		zero_cmd(cmd);
		cmd[0]=READDINFO;	/*Read Disc Info*/
		matcd_slowcmd(port,ldrive,cdrive,cmd);
		i=waitforit(10*TICKRES,DTEN,port,"matvinf");
		if (i) {		/*THIS SHOULD NOT HAPPEN*/
			z=get_stat(port,ldrive);/*Read status byte*/
			printf("matcd%d: command failed, status %x\n",
			       ldrive,z);
			return(-1);
		}
		matcd_pread(port, 6, data);	/*Read data returned*/
		z=get_stat(port,ldrive);/*Read status byte*/
#ifdef DEBUGOPEN
		printf("matcd%d: Data got was %x %x %x %x %x %x   ",ldrive,
		       data[0],data[1],data[2], data[3],data[4],data[5]);
		printf("status byte %x\n",z);
#endif	/*DEBUGOPEN*/
		if ((z & MATCD_ST_ERROR)==0)
			break;		/*No Error*/

/*	If media change or other error, you have to read error data or
	the drive will reject subsequent commands.
*/

		if (chk_error(get_error(port, ldrive, cdrive))==ERR_FATAL) {
#ifdef DEBUGOPEN
			printf("matcd%d: command failed, status %x\n",
			       ldrive,z);
#endif /*DEBUGOPEN*/
			return(-1);
		}
		tsleep((caddr_t)&nextcontroller, PRIBIO, "matvi2", hz);
		if ((--retry)==0) return(-1);
#ifdef DEBUGOPEN
		printf("matcd%d: Retrying",ldrive);
#endif /*DEBUGOPEN*/
	}
#ifdef DEBUGOPEN
	printf("matcd%d: Status port %x  \n",ldrive,inb(port+STATUS));
#endif /*DEBUGOPEN*/

	cd->volinfo.type=data[0];
	cd->volinfo.trk_high=data[2];
	cd->volinfo.trk_low=data[1];
	cd->volinfo.vol_msf[0]=data[3];
	cd->volinfo.vol_msf[1]=data[4];
	cd->volinfo.vol_msf[2]=data[5];

	if (cd->volinfo.trk_low + cd->volinfo.trk_high) {
		cd->flags |= MATCDLABEL;
		return(0);
	}
	return(-1);
}


/*---------------------------------------------------------------------------
	blk_to_msf - Convert block numbers into CD disk block ids
---------------------------------------------------------------------------*/

static void blk_to_msf(int blk, unsigned char *msf)
{
	blk=blk+150;			/*2 seconds skip required to
					  reach ISO data*/
	msf[0]=blk/4500;
	blk=blk%4500;
	msf[1]=blk/75;
	msf[2]=blk%75;
	return;
}


/*---------------------------------------------------------------------------
	msf_to_blk - Convert CD disk block ids into block numbers
---------------------------------------------------------------------------*/

static int msf_to_blk(unsigned char * cd)
{
	return(((cd[0]*60)		/*Convert MSF to*/
	       +cd[1])*75		/*Blocks minus 2*/
	       +cd[2]-150);		/*seconds*/
}


/*---------------------------------------------------------------------------
	matcd_blockread - Performs actual background disc I/O operations

	This routine is handed the block number to read, issues the
	command to the drive, waits for it to complete, reads the
	data or error, retries if needed, and returns the results
	to the host.
---------------------------------------------------------------------------*/

static void matcd_blockread(int state)
{
	struct	matcd_mbx *mbx;
	int	ldrive,cdrive;
	int	port, controller;
	short	iftype;
	struct	buf *bp;
	struct	matcd_data *cd;
	int	i;
	struct	matcd_read2 rbuf;
	int	blknum;
	caddr_t addr;
	int	status;
	int	errtyp;
	int	phase;
	unsigned char cmd[MAXCMDSIZ];

	mbx = &matcd_data[state & 0x0f].mbx;
	ldrive=mbx->ldrive;		/*ldrive is logical drive #*/
	cdrive=ldrive & 0x03;		/*cdrive is drive # on a controller*/
	port=mbx->port;			/*port is base port for i/f*/
	iftype=mbx->iftype;
	bp= mbx->bp;
	cd=&matcd_data[ldrive];
	controller = cd->mbx.controller;

#ifdef DEBUGIO
	printf("matcd%d: Show state %x cdrive %d partition %d\n",
	       ldrive,state,cdrive,mbx->partition);
#endif /*DEBUGIO*/

loop:
#ifdef DEBUGIO
	printf("matcd%d: Top  dp %x\n",ldrive,(unsigned int)dp);
#endif /*DEBUGIO*/
	switch (state & 0xf0) {
	case	MATCD_READ_1:
#ifdef DEBUGIO
		printf("matcd%d: State 1 cd->flags %x\n",ldrive,cd->flags);
#endif /*DEBUGIO*/
		/* to check for raw/cooked mode */
		if (cd->partflags[mbx->partition] & MATCDREADRAW) {
			mbx->sz = MATCDRBLK;
			i=matcd_setmode(ldrive, MODE_DA);
#ifdef DEBUGIO
			printf("matcd%d: Set MODE_DA result %d\n",ldrive,i);
#endif /*DEBUGIO*/
		} else {
			mbx->sz = cd->blksize;
			i=matcd_setmode(ldrive, MODE_DATA);
#ifdef DEBUGIO
			printf("matcd%d: Set MODE_DATA result %d\n",ldrive,i);
#endif /*DEBUGIO*/
		}
		/*for first block*/
#ifdef DEBUGIO
		printf("matcd%d: A mbx %x bp %x b_bcount %x sz %x\n",
		       ldrive,(unsigned int)mbx,(unsigned int)bp,
		       (unsigned int)bp->b_bcount,mbx->sz);
#endif /*DEBUGIO*/
		mbx->nblk = (bp->b_bcount + (mbx->sz-1)) / mbx->sz;
		mbx->skip=0;
nextblock:
#ifdef DEBUGIO
		printf("matcd%d: at Nextblock b_blkno %d\n",
		       ldrive,(unsigned int)bp->b_blkno);
#endif /*DEBUGIO*/

		blknum=(bp->b_blkno / (mbx->sz/DEV_BSIZE))
		       + mbx->p_offset + mbx->skip/mbx->sz;

		blk_to_msf(blknum,rbuf.start_msf);

		zero_cmd(cmd);
		cmd[0]=READ;		/*Get drive ID*/
		cmd[1]=rbuf.start_msf[0];
		cmd[2]=rbuf.start_msf[1];
		cmd[3]=rbuf.start_msf[2];
		cmd[6]=1;		/*Xfer only one block*/
		matcd_slowcmd(port,ldrive,cdrive,cmd);

/*	Now that we have issued the command, check immediately to
	see if data is ready.   The drive has read-ahead caching, so
	it is possible the data is already in the drive buffer.

	If the data is not ready, schedule a wakeup and later on this
	code will run again to see if the data is ready then.
*/

	case MATCD_READ_2:
		state=MATCD_READ_2+ldrive;
		phase = (inb(port+STATUS)) & (DTEN|STEN);
#ifdef DEBUGIO
		printf("matcd%d: In state 2 status %x  ",ldrive,phase);
#endif /*DEBUGIO*/
		switch(phase) {
		case (DTEN|STEN):	/*DTEN==H  STEN==H*/
#ifdef DEBUGIO
			printf("matcd%d: Sleeping\n",ldrive);
#endif /*DEBUGIO*/
			timeout((timeout_func_t)matcd_blockread,
				(caddr_t)MATCD_READ_2+ldrive,hz/100);
			return;


		case	STEN:		/*DTEN=L STEN=H*/
		case	0:		/*DTEN=L STEN=L*/
#ifdef DEBUGIO
			printf("matcd%d: Data Phase\n",ldrive);
#endif /*DEBUGIO*/
			addr=bp->b_un.b_addr + mbx->skip;
#ifdef DEBUGIO
			printf("matcd%d: Xfer Addr %x  size %x",
			       ldrive,(unsigned int)addr,mbx->sz);
			i=0;			/*<20>Reset read count*/
#endif /*DEBUGIO*/
			if (iftype==0) {	/*<20>Creative host I/F*/
				outb(port+PHASE,1);	/*Enable data read*/
				while((inb(port+STATUS) &
				      (DTEN|STEN))==STEN) {
					*addr++=inb(port+DATA);
#ifdef	DEBUGIO
					i++;
#endif /*DEBUGIO*/
				}
				outb(port+PHASE,0);	/*Disable read*/
			} else {		/*<20>Not Creative interface*/
				while((inb(port+STATUS) &
				      (DTEN|STEN))==STEN) {
					*addr++=inb(port+ALTDATA);
#ifdef	DEBUGIO
					i++;
#endif	/*DEBUGIO*/
				}
			}
#ifdef DEBUGIO
			printf("matcd%d: Read %d bytes\n",ldrive,i);
#endif /*DEBUGIO*/


/*	Now, wait for the Status phase to arrive.   This will also
	tell us if any went wrong with the request.
*/
			while((inb(port+STATUS)&(DTEN|STEN)) != DTEN);
			status=get_stat(port,ldrive);	/*Read status byte*/
#ifdef DEBUGIO
			printf("matcd%d: Status port %x byte %x  ",
			       ldrive,i,status);
#endif /*DEBUGIO*/
			if (status & MATCD_ST_ERROR) {
				i=get_error(port,ldrive,cdrive);
				printf("matcd%d: %s while reading block %d [Soft]\n",
				       ldrive,matcderrors[i],(int)bp->b_blkno);
				media_chk(cd,i,ldrive,0);/*<14>was wrong place*/
			}

			if (--mbx->nblk > 0) {
				mbx->skip += mbx->sz;
				goto nextblock;	/*Oooooh, you flunk the course*/
			}
			bp->b_resid=0;
			biodone(bp);	/*Signal transfer complete*/

			unlockbus(ldrive>>2, ldrive);	/*Release bus lock*/
			matcd_start(controller);/*See if other drives have work*/
			return;

/*	Here we skipped the data phase and went directly to status.
	This indicates a hard error.
*/

		case	DTEN:		/*DTEN=H STEN=L*/
			status=get_stat(port,ldrive);	/*Read status byte*/
#ifdef DEBUGIO
			printf("matcd%d: error, status was %x\n",
			       ldrive,status);
#endif /*DEBUGIO*/

/*	Ok, we need more details, so read error.  This is needed to issue
	any further commands anyway
*/

			errtyp=get_error(port,ldrive,cdrive);
			printf("matcd%d: %s while reading block %d\n",
				ldrive,matcderrors[errtyp],(int)bp->b_blkno);

			if (media_chk(cd,errtyp,ldrive,0)==0) {
				errtyp=chk_error(errtyp);
				if (errtyp==ERR_RETRY) {/*<14>We can retry*/
					/*<14>this error but the drive*/
					/*<14>probably has already*/
					if (mbx->retry-- > 0 ) {
						state=MATCD_READ_1+ldrive;
#ifdef DEBUGIO
						printf("matcd%d: Attempting retry\n",
						ldrive);
#endif /*DEBUGIO*/
						goto loop;
					}
				}
			}
/*<14>	The other error types are either something very bad or the media
<14>	has been removed by the user.  In both cases there is no retry
<14>	for this call.  We will invalidate the label in both cases.
*/
			bp->b_flags |= B_ERROR;
			bp->b_resid = bp->b_bcount;
			biodone(bp);
			unlockbus(ldrive>>2, ldrive);
			matcd_start(controller);
			return;
		}
	}
}


/*---------------------------------------------------------------------------
	docmd - Get the bus, do the command, wait for completion,
		attempt retries, give up the bus.
		For commands that do not return data.
---------------------------------------------------------------------------*/

int docmd(char * cmd, int ldrive, int cdrive, int controller, int port)
{
	int retries,i,z;

	lockbus(controller, ldrive);	/*Request bus*/
	retries=3;
	while(retries-- > 0) {
		matcd_slowcmd(port,ldrive,cdrive,cmd);
		i=waitforit(80*TICKRES,DTEN,port,"matcmd");
		z=get_stat(port,ldrive);/*Read status byte*/
		if ((z & MATCD_ST_ERROR)==0) break;
		i=chk_error(get_error(port,ldrive,cdrive));
		if (i!=ERR_INIT) {
			unlockbus(controller, ldrive);	/*Release bus*/
			return(EFAULT);
		}
	}
	unlockbus(controller, ldrive);	/*Release bus*/
	return(i);
}


/*---------------------------------------------------------------------------
	get_error - Read the error that aborted a command.
	Created in Edit 6
---------------------------------------------------------------------------*/

int get_error(int port, int ldrive, int cdrive)
{
	int	status,errnum;
	unsigned char cmd1[MAXCMDSIZ];
	unsigned char data[12];

	zero_cmd(cmd1);
	cmd1[0]=READERROR;		/*Enquire*/
	matcd_fastcmd(port,ldrive,cdrive,cmd1);
	matcd_pread(port, 8, data);	/*Read data returned*/
	errnum=data[2];			/*Caller wants it classified*/
	status=get_stat(port,ldrive);	/*Read status byte*/

#ifdef DEBUGCMD
	printf("matcd%d: Chkerror found %x on command %x addrval %x statusdata %x statusport %x\n",
		ldrive,errnum,data[1],data[0],status,inb(port+STATUS));
#endif /*DEBUGCMD*/
	return(errnum);
}


/*---------------------------------------------------------------------------
	chk_error - Classify the error that the drive reported
	Created in Edit 6
---------------------------------------------------------------------------*/

int chk_error(int errnum)
{
	switch(errnum) {
/*	These are errors we can attempt a retry for, although the drive
	has already done so.
*/
	case	UNRECV_ERROR:
	case	SEEK_ERROR:
	case	TRACK_ERROR:
	case	FOCUS_ERROR:
	case	CLV_ERROR:
	case	DATA_ERROR:
	case	MODE_ERROR:		/*<16>Make this retryable*/
		return(ERR_RETRY);

/*	These errors usually indicate the user took the media from the
	drive while the dev was open.  We will invalidate the unit
	until it closes when we see this.
*/
	case	NOT_READY:
	case	MEDIA_CHANGED:
	case	DISC_OUT:
	case	HARD_RESET:
		return	(ERR_INIT);

/*	These errors indicate the system is confused about the drive
	or media, and point to bugs in the driver or OS.  These errors
	cannot be retried since you will always get the same error.
*/

	case	RAM_ERROR:
	case	DIAG_ERROR:
	case	CDB_ERROR:
	case	END_ADDRESS:
	case	ILLEGAL_REQ:
	case	ADDRESS_ERROR:
	default:
		return	(ERR_FATAL);
	}
}


/*---------------------------------------------------------------------------
	get_stat - Reads status byte

	This routine should be totally unnecessary, performing the
	task with a single line of in-line code.  However in special
	cases, the drives return blocks of data that are not associated
	with the command in question.  This appears to be at least one
	firmware error and the rest of the driver makes an effort to avoid
	triggering the fault.  However, reading and throwing this
	bogus data is faster and less destructive than resetting all
	the drives on a given controller, plus it leaves the other drives
	unaffected.
---------------------------------------------------------------------------*/

int get_stat(int port,int ldrive)
{
	int 	status,busstat;

	status=inb(port+DATA);		/*Read status byte, last step of cmd*/
	busstat=inb(port+STATUS);	/*<16>Get bus status - should be 0xff*/
	while ((busstat & (DTEN|STEN)) != (DTEN|STEN)) {
		printf("matcd%d: get_stat: After reading status byte, bus didn't go idle %x %x %x\n",ldrive,status,busstat,port);
		if (( busstat & (DTEN|STEN)) == STEN) {
			int k;
			k=0;
#ifdef DEBUGCMD
			printf("matcd%d: DATA PRESENT!!!! DISCARDING\n",ldrive);
#endif /*DEBUGCMD*/
			outb(port+PHASE,1);	/*Enable data read*/
			while ((inb(port+STATUS) & (DTEN|STEN)) == STEN) {
				inb(port+DATA);
				inb(port+ALTDATA);
/*				printf("%2x ",inb(port+DATA));*/
				k++;
			}
			outb(port+PHASE,0);
#ifdef DEBUGCMD
			printf("\nmatcd%d: BYTES READ IN DATA was %d\n",
			       ldrive,k);
#endif /*DEBUGCMD*/
		}
		status=inb(port+DATA);	/*Read the status byte again*/
#ifdef DEBUGCMD
		printf("matcd%d: Next status byte is %x\n",ldrive,status);
#endif /*DEBUGCMD*/
		busstat=inb(port+STATUS);
	}
	return(status);
}


/*---------------------------------------------------------------------------
	waitforit - Waits for a command started by slowcmd to complete.
---------------------------------------------------------------------------*/

int waitforit(int timelimit, int state, int port, char * where)
{
	int i,j;

	j=i=0;
#ifdef DEBUGCMD
	printf("matcd: waitforit port %x timelimit %x hz %x\n",
	       port,timelimit,hz);
#endif /*DEBUGCMD*/
	while (i<timelimit) {
		j=inb(port+STATUS) & (STEN|DTEN);	/*Read status*/
		if (j!=(STEN|DTEN)) break;
		tsleep((caddr_t)&nextcontroller, PRIBIO, where, hz/100);
		i++;
	}
#ifdef DEBUGCMD
	printf("matcd: Count was %d\n",i);
#endif /*DEBUGCMD*/
	if (j==state) return(0);	/*Command complete*/
#ifdef DEBUGCMD
	printf("matcd: Timeout!");
#endif /*DEBUGCMD*/
	return(1);			/*Timeout occurred*/
}


/*---------------------------------------------------------------------------
	lockbus - Wait for the bus on the requested driver interface
		to go idle and acquire it.
	Created in Edit 6
---------------------------------------------------------------------------*/

void lockbus(int controller, int ldrive)
{
	while ((if_state[controller] & BUSBUSY)) {
#ifdef DEBUGSLEEP
		printf("matcd%d: Can't do it now - going to sleep\n",
		       ldrive);
#endif /*DEBUGSLEEP*/
		tsleep((caddr_t)&matcd_data->status, PRIBIO,
		       "matlck", 0);
	}
	if_state[controller] |= BUSBUSY;	/*<18>It's ours NOW*/
#ifdef DEBUGSLEEP
	printf("matcd%d: BUS locked in lockbus\n",ldrive);
#endif /*DEBUGSLEEP*/
}


/*---------------------------------------------------------------------------
	unlockbus - Release the host interface bus we already have so
		someone else can use it.
	Created in Edit 6
---------------------------------------------------------------------------*/

void unlockbus(int controller, int ldrive)
{
	if_state[controller] &= ~BUSBUSY;
#ifdef DEBUGSLEEP
	printf("matcd%d: bus unlocked\n",ldrive);
#endif /*DEBUGSLEEP*/
	wakeup((caddr_t)&matcd_data->status);	/*Wakeup other users*/
	matcd_start(controller);	/*Wake up any block I/O*/
}


/*---------------------------------------------------------------------------
	media_chk - 	Checks error for types related to media
			changes.
---------------------------------------------------------------------------*/

int media_chk(struct matcd_data *cd,int errnum,int ldrive,int test)
{
	if (errnum==NOT_READY ||
	    errnum==MEDIA_CHANGED ||
	    errnum==HARD_RESET ||
	    errnum==DISC_OUT) {
		cd->flags &= ~MATCDLABEL;	/*Mark label as invalid*/
		if (test==0) {		/*<14>Do warn by default*/

			if ((cd->flags & MATCDWARN)==0) {/*<14>Msg already?*/
				printf("matcd%d: Media changed - Further I/O aborted until device closed\n",ldrive);
				cd->flags |= MATCDWARN;
			}
		}
		return(1);
	}
	if (errnum==MODE_ERROR)			/*<16>Maybe the setting is*/
		cd->drivemode=MODE_UNKNOWN;	/*<16>wrong so force a reset*/
	return(0);
}


/*---------------------------------------------------------------------------
	matcd_eject - Open drive tray
---------------------------------------------------------------------------*/

int matcd_eject(int ldrive, int cdrive, int controller)
{
	int	 i,port;
	struct	matcd_data *cd;
	unsigned	char	cmd[MAXCMDSIZ];

	cd=&matcd_data[ldrive];
	port=cd->iobase;		/*Get I/O port base*/

#ifdef LOCKDRIVE
	if (cd->flags & MATCDLOCK) {	/*<15>Drive was locked via open*/
		return(EINVAL);		/*<15>so don't allow the eject*/
	}
#endif /*LOCKDRIVE*/
	zero_cmd(cmd);			/*Initialize command buffer*/
	cmd[0]=LOCK;			/*Unlock drive*/
	i=docmd(cmd,ldrive,cdrive,controller,port);	/*Issue command*/
	cmd[0]=DOOROPEN;		/*Open Door*/
	i=docmd(cmd,ldrive,cdrive,controller,port);	/*Issue command*/
	cd->flags &= ~(MATCDLABEL|MATCDLOCK);	/*<15>Mark vol info invalid*/
	return(i);			/*Return result we got*/
}


/*---------------------------------------------------------------------------
	matcd_doorclose - Close drive tray
<16>	Added in Edit 16
---------------------------------------------------------------------------*/

int matcd_doorclose(int ldrive, int cdrive, int controller)
{
	int	 i,port;
	struct	matcd_data *cd;
	unsigned	char	cmd[MAXCMDSIZ];

	cd=&matcd_data[ldrive];
	port=cd->iobase;		/*Get I/O port base*/

	zero_cmd(cmd);			/*Initialize command buffer*/
	cmd[0]=DOORCLOSE;		/*Open Door*/
	i=docmd(cmd,ldrive,cdrive,controller,port);	/*Issue command*/
	cd->flags &= ~(MATCDLABEL|MATCDLOCK);	/*Mark vol info invalid*/
	tsleep((caddr_t)&nextcontroller, PRIBIO, "matclos", hz);
	return(i);			/*Return result we got*/
}


/*---------------------------------------------------------------------------
<23>	matcd_dlock - Honor/Reject drive tray requests
---------------------------------------------------------------------------*/

int matcd_dlock(int ldrive, int cdrive, int controller, int action)
{
	int	 i,port;
	struct	matcd_data *cd;
	unsigned	char	cmd[MAXCMDSIZ];

	cd=&matcd_data[ldrive];
	port=cd->iobase;		/*<23>Get I/O port base*/

	zero_cmd(cmd);			/*<23>Initialize command buffer*/
	cmd[0]=LOCK;			/*<23>Unlock drive*/

	if (action) {			/*<23>They want to lock the door?*/
		cd->flags |= MATCDLOCK;	/*<23>Remember we did this*/
		cmd[1]=1;		/*<23>Lock Door command*/
	} else {
		cd->flags &= ~MATCDLOCK;/*<23>Remember we did this*/
					/*<23>Unlock Door command*/
	}
	i=docmd(cmd,ldrive,cdrive,controller,port);	/*<23>Issue command*/
	return(i);			/*<23>Return result we got*/
}


/*---------------------------------------------------------------------------
	matcd_toc_header - Return Table of Contents header to caller
<13>	New for Edit 13
---------------------------------------------------------------------------*/

static int matcd_toc_header(int ldrive, int cdrive, int controller,
		       struct ioc_toc_header * toc)
{
	struct	matcd_data *cd;

	cd=&matcd_data[ldrive];
	if ((cd->flags & MATCDLABEL)==0)
		return(EIO);		/*Refuse after chg error*/

	toc->len=msf_to_blk(cd->volinfo.vol_msf);	/*In frames*/
	toc->starting_track=cd->volinfo.trk_low;	/*1*/
	toc->ending_track=cd->volinfo.trk_high;		/*Last track*/

	return(0);

}


/*---------------------------------------------------------------------------
	matcd_toc_entries - Read all of the TOC entries

	These entries are cached by the drive, but it might be worth
	the space investment to have the driver cache these as well.
	For a disc with 40 tracks, it means 41 command calls to get
	this information from the drive.
<13>	New for Edit 13
---------------------------------------------------------------------------*/

static int matcd_toc_entries(int ldrive, int cdrive, int controller,
			     struct ioc_read_toc_entry * ioc_entry)
{
	struct	matcd_data *cd;
	struct	cd_toc_entry entries[MAXTRKS];
	struct	cd_toc_entry *from;
	struct	cd_toc_entry *to;
	int	len,trk,i,z,port;
	unsigned char cmd[MAXCMDSIZ];
	unsigned char data[5];

	cd=&matcd_data[ldrive];
	port=cd->iobase;

	if ((cd->flags & MATCDLABEL)==0)
		return(EIO);		/*Refuse after chg error*/

	zero_cmd(cmd);
	cmd[0]=READTOC;

	for(trk=cd->volinfo.trk_low-1; trk<cd->volinfo.trk_high; trk++) {
		cmd[2]=trk+1;
		lockbus(controller, ldrive);	/*Request bus*/
		matcd_slowcmd(port,ldrive,cdrive,cmd);
		i=waitforit(10*TICKRES,DTEN,port,"mats1");
		matcd_pread(port, 8, data);	/*Read data returned*/
		z=get_stat(port,ldrive);	/*Read status byte*/
		if ((z & MATCD_ST_ERROR)) {	/*Something went wrong*/
			i=get_error(port, ldrive, cdrive);
			unlockbus(controller, ldrive);	/*Release bus*/
			return(EIO);
		}
		unlockbus(controller, ldrive);	/*Release bus*/

#ifdef DEBUGIOCTL
		printf("Track %d addr/ctrl %x  m %x s %x f %x\n",data[2],
		       data[1],data[4],data[5],data[6]);
#endif /*DEBUGIOCTL*/

		entries[trk].control=data[1];	/*Track type*/
		entries[trk].addr_type=ioc_entry->address_format;/*Type*/
		entries[trk].track=data[2];	/*Track #, can be Out of Order*/
		if (ioc_entry->address_format == CD_MSF_FORMAT) {
			entries[trk].addr.msf.unused=0;
			entries[trk].addr.msf.minute=data[4];	/*Min*/
			entries[trk].addr.msf.second=data[5];	/*Sec*/
			entries[trk].addr.msf.frame=data[6];	/*Frame*/
		}
	}
	entries[trk].control=data[2];	/*Copy from last valid track*/
	entries[trk].track=0xaa;	/*<23>Lead-out*/
	entries[trk].addr.msf.unused=0;	/*Fill*/
	entries[trk].addr.msf.minute=cd->volinfo.vol_msf[0];
	entries[trk].addr.msf.second=cd->volinfo.vol_msf[1];
	entries[trk].addr.msf.frame=cd->volinfo.vol_msf[2];
	trk++;				/*Bump to include leadout track*/


/*	Now that we have read all the data from the drive, copy the
	array from the kernel address space into the user address space
*/

	len=ioc_entry->data_len;
	i=ioc_entry->starting_track;	/*<23>What did they want?*/
	if (i==0xaa) i=trk-1;		/*<23>Give them lead-out info*/
	else i=ioc_entry->starting_track - 1;	/*<23>start where they asked*/
	from = &entries[i];
	to = ioc_entry->data;

	while (i < trk && len >= sizeof(struct cd_toc_entry)) {
		if (copyout(from,to,sizeof(struct cd_toc_entry))
		    != 0) {
			return (EFAULT);
		}
		i++;
		len -= sizeof(struct cd_toc_entry);
		from++;
		to++;
	}
	return(0);

}

/*---------------------------------------------------------------------------
	matcd_subq - Read the Sub-Q packet - (where are we?)

	This call gives a snapshot state of where the optical
	pick-up is when the command is issued.
<14>	New for Edit 14
---------------------------------------------------------------------------*/

static int matcd_read_subq(int ldrive, int cdrive, int controller,
			     struct ioc_read_subchannel * sqp)
{
	struct	matcd_data *cd;
	int	i,z,port;
	unsigned char cmd[MAXCMDSIZ];
	unsigned char data[12];
	struct cd_sub_channel_info subq;	/*Build result here*/

	cd=&matcd_data[ldrive];
	port=cd->iobase;

	if ((cd->flags & MATCDLABEL)==0)
		return(EIO);		/*Refuse after chg error*/

/*	We only support the ioctl functions we could get information
	on, so test for the things we can do
*/

	if (sqp->data_format!=CD_CURRENT_POSITION ||
	    sqp->address_format!=CD_MSF_FORMAT) {
		return(EINVAL);
	}

	zero_cmd(cmd);
	cmd[0]=READSUBQ;
	lockbus(controller, ldrive);	/*Request bus*/
	matcd_slowcmd(port,ldrive,cdrive,cmd);

/*	While we wait, fill in the hard-coded entries of the table*/

	subq.what.position.data_format=CD_MSF_FORMAT;
	subq.what.position.absaddr.msf.unused=0;
	subq.what.position.reladdr.msf.unused=0;

	i=waitforit(10*TICKRES,DTEN,port,"mats2");
	matcd_pread(port, 11, data);	/*Read data returned*/
	z=get_stat(port,ldrive);	/*Read status byte*/
	if ((z & MATCD_ST_ERROR)) {	/*Something went wrong*/
		i=get_error(port, ldrive, cdrive);
		unlockbus(controller, ldrive);	/*Release bus*/
		return(EIO);
	}
	unlockbus(controller, ldrive);	/*Release bus*/

#ifdef DEBUGIOCTL
	printf("Subq track %d index %d adr/ctl %x  abs %d:%2d:%2d  rel %d:%2d:%2d UPC %x\n",
	       data[2],data[3],data[1],data[4],data[5],data[6],
	       data[7],data[8],data[9],data[10]);
#endif /*DEBUGIOCTL*/

	if (z & MATCD_ST_AUDIOBSY) {	/*Drive playing or paused*/
		if (cd->status==CD_AS_PLAY_PAUSED) {	/*Have we issued*/
			i=cd->status;		/*a pause command?*/
		} else {
			i=CD_AS_PLAY_IN_PROGRESS;/*No, we really are playing*/
		}
	} else {
		if (cd->status==CD_AS_PLAY_IN_PROGRESS) {/*It was playing*/
			i=CD_AS_PLAY_COMPLETED;	/*so it finished*/
		} else {			/*Any other status reported*/
			i=cd->status;		/*as we get it*/
		}
	}

	subq.header.audio_status=cd->status=i;	/*Store status we selected*/

	subq.what.position.track_number=data[2];
	subq.what.position.index_number=data[3];

	subq.what.position.absaddr.msf.minute=data[4];
	subq.what.position.absaddr.msf.second=data[5];
	subq.what.position.absaddr.msf.frame=data[6];

	subq.what.position.reladdr.msf.minute=data[7];
	subq.what.position.reladdr.msf.second=data[8];
	subq.what.position.reladdr.msf.frame=data[9];

/*	Ok, now copy our nicely-built structure from the kernel address
	space into the user address space (we hope)
*/

	if (copyout(&subq, sqp->data,
	    min(sizeof(struct cd_sub_channel_info), sqp->data_len))!=0) {
		return(EFAULT);
	}
	return(0);
}

/*---------------------------------------------------------------------------
	matcd_igot - Like the song, report the capabilities that the
		     drive/driver has available.

	This call returns a structure of flags indicating what
	functions are available so that the application can offer
	only the functions the drive is actually capable of.
<16>	New for Edit 16
---------------------------------------------------------------------------*/

static int matcd_igot(struct ioc_capability * sqp)
{

#ifdef FULLDRIVER
	sqp->play_function=(CDDOPLAYTRK |	/*Can play trks/indx*/
			   CDDOPLAYMSF |	/*Can play msf to msf*/
			   CDDOPAUSE |		/*Can pause playback*/
			   CDDORESUME |		/*Can resume playback*/
			   CDDOSTOP |		/*Can stop playback*/
			   CDDOPITCH);		/*Can change play pitch*/

	sqp->routing_function=(CDREADVOLUME |	/*Can read volume*/
			      CDSETVOLUME |	/*Can set volume*/
			      CDSETSTEREO |	/*Can select stereo play*/
			      CDSETLEFT |	/*Can select left-only*/
			      CDSETRIGHT |	/*Can select right-only*/
			      CDSETMUTE |	/*Can mute audio*/
			      CDSETPATCH);	/*Direct patch settings*/
#else /*FULLDRIVER*/
	sqp->play_function=0;			/*No audio capability*/
	sqp->routing_function=0;		/*No audio capability*/
#endif /*FULLDRIVER*/

	sqp->special_function=(CDDOEJECT |	/*Door can be opened*/
			      CDDOCLOSE |	/*Door can be closed*/
			      CDDOLOCK |	/*Door can be locked*/
			      CDREADSUBQ |	/*Can read subchannel*/
			      CDREADENTRIES |	/*Can read TOC entries*/
			      CDREADHEADER);	/*Can read TOC*/
	return(0);
}


#ifdef FULLDRIVER
#include	"i386/isa/matcd/audio.c"	/*<15>ioctls related to
						      audio are here*/
#endif	/*FULLDRIVER*/


static matcd_devsw_installed = 0;

static void
matcd_drvinit(void *unused)
{

	if( ! matcd_devsw_installed ) {
		bdevsw_add_generic(BDEV_MAJOR,CDEV_MAJOR, &matcd_bdevsw);
		matcd_devsw_installed = 1;
    	}
}

SYSINIT(matcddev,SI_SUB_DRIVERS,SI_ORDER_MIDDLE+CDEV_MAJOR,matcd_drvinit,NULL)


/*End of matcd.c*/