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[unix-history] / sys / i386 / isa / mcd.c
/*
* Copyright 1993 by Holger Veit (data part)
* Copyright 1993 by Brian Moore (audio part)
* All rights reserved.
*
* 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, this list of conditions and the following disclaimer.
* 2. 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This software was developed by Holger Veit and Brian Moore
* for use with "386BSD" and similar operating systems.
* "Similar operating systems" includes mainly non-profit oriented
* systems for research and education, including but not restricted to
* "NetBSD", "FreeBSD", "Mach" (by CMU).
* 4. Neither the name of the developer(s) nor the name "386BSD"
* may be used to endorse or promote products derived from this
* software without specific prior written permission.
*
* 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.
*
* $Id: mcd.c,v 1.2 1993/10/16 13:46:13 rgrimes Exp $
*/
static char COPYRIGHT[] = "mcd-driver (C)1993 by H.Veit & B.Moore";
#include "mcd.h"
#if NMCD > 0
#include "types.h"
#include "param.h"
#include "systm.h"
#include "conf.h"
#include "file.h"
#include "buf.h"
#include "stat.h"
#include "uio.h"
#include "ioctl.h"
#include "cdio.h"
#include "errno.h"
#include "dkbad.h"
#include "disklabel.h"
#include "i386/isa/isa.h"
#include "i386/isa/isa_device.h"
#include "mcdreg.h"
/* user definable options */
/*#define MCD_TO_WARNING_ON*/ /* define to get timeout messages */
/*#define MCDMINI*/ /* define for a mini configuration for boot kernel */
#ifdef MCDMINI
#define MCD_TRACE(fmt,a,b,c,d)
#ifdef MCD_TO_WARNING_ON
#undef MCD_TO_WARNING_ON
#endif
#else
#define MCD_TRACE(fmt,a,b,c,d) {if (mcd_data[unit].debug) {printf("mcd%d st=%02x: ",unit,mcd_data[unit].status); printf(fmt,a,b,c,d);}}
#endif
#define mcd_part(dev) ((minor(dev)) & 7)
#define mcd_unit(dev) (((minor(dev)) & 0x38) >> 3)
#define mcd_phys(dev) (((minor(dev)) & 0x40) >> 6)
#define RAW_PART 3
/* flags */
#define MCDOPEN 0x0001 /* device opened */
#define MCDVALID 0x0002 /* parameters loaded */
#define MCDINIT 0x0004 /* device is init'd */
#define MCDWAIT 0x0008 /* waiting for something */
#define MCDLABEL 0x0010 /* label is read */
#define MCDPROBING 0x0020 /* probing */
#define MCDREADRAW 0x0040 /* read raw mode (2352 bytes) */
#define MCDVOLINFO 0x0080 /* already read volinfo */
#define MCDTOC 0x0100 /* already read toc */
#define MCDMBXBSY 0x0200 /* local mbx is busy */
/* status */
#define MCDAUDIOBSY MCD_ST_AUDIOBSY /* playing audio */
#define MCDDSKCHNG MCD_ST_DSKCHNG /* sensed change of disk */
#define MCDDSKIN MCD_ST_DSKIN /* sensed disk in drive */
#define MCDDOOROPEN MCD_ST_DOOROPEN /* sensed door open */
/* toc */
#define MCD_MAXTOCS 104 /* from the Linux driver */
#define MCD_LASTPLUS1 170 /* special toc entry */
struct mcd_mbx {
short unit;
short port;
short retry;
short nblk;
int sz;
u_long skip;
struct buf *bp;
int p_offset;
short count;
};
struct mcd_data {
short config;
short flags;
short status;
int blksize;
u_long disksize;
int iobase;
struct disklabel dlabel;
int partflags[MAXPARTITIONS];
int openflags;
struct mcd_volinfo volinfo;
#ifndef MCDMINI
struct mcd_qchninfo toc[MCD_MAXTOCS];
short audio_status;
struct mcd_read2 lastpb;
#endif
short debug;
struct buf head; /* head of buf queue */
struct mcd_mbx mbx;
} mcd_data[NMCD];
/* reader state machine */
#define MCD_S_BEGIN 0
#define MCD_S_BEGIN1 1
#define MCD_S_WAITSTAT 2
#define MCD_S_WAITMODE 3
#define MCD_S_WAITREAD 4
/* prototypes */
int mcdopen(dev_t dev);
int mcdclose(dev_t dev);
void mcdstrategy(struct buf *bp);
int mcdioctl(dev_t dev, int cmd, caddr_t addr, int flags);
int mcdsize(dev_t dev);
static void mcd_done(struct mcd_mbx *mbx);
static void mcd_start(int unit);
static int mcd_getdisklabel(int unit);
static void mcd_configure(struct mcd_data *cd);
static int mcd_get(int unit, char *buf, int nmax);
static void mcd_setflags(int unit,struct mcd_data *cd);
static int mcd_getstat(int unit,int sflg);
static int mcd_send(int unit, int cmd,int nretrys);
static int bcd2bin(bcd_t b);
static bcd_t bin2bcd(int b);
static void hsg2msf(int hsg, bcd_t *msf);
static int msf2hsg(bcd_t *msf);
static int mcd_volinfo(int unit);
static int mcd_waitrdy(int port,int dly);
static void mcd_doread(int state, struct mcd_mbx *mbxin);
#ifndef MCDMINI
static int mcd_setmode(int unit, int mode);
static int mcd_getqchan(int unit, struct mcd_qchninfo *q);
static int mcd_subchan(int unit, struct ioc_read_subchannel *sc);
static int mcd_toc_header(int unit, struct ioc_toc_header *th);
static int mcd_read_toc(int unit);
static int mcd_toc_entry(int unit, struct ioc_read_toc_entry *te);
static int mcd_stop(int unit);
static int mcd_playtracks(int unit, struct ioc_play_track *pt);
static int mcd_play(int unit, struct mcd_read2 *pb);
static int mcd_pause(int unit);
static int mcd_resume(int unit);
#endif
extern int hz;
extern int mcd_probe(struct isa_device *dev);
extern int mcd_attach(struct isa_device *dev);
struct isa_driver mcddriver = { mcd_probe, mcd_attach, "mcd" };
#define mcd_put(port,byte) outb(port,byte)
#define MCD_RETRYS 5
#define MCD_RDRETRYS 8
#define MCDBLK 2048 /* for cooked mode */
#define MCDRBLK 2352 /* for raw mode */
/* several delays */
#define RDELAY_WAITSTAT 300
#define RDELAY_WAITMODE 300
#define RDELAY_WAITREAD 800
#define DELAY_STATUS 10000l /* 10000 * 1us */
#define DELAY_GETREPLY 200000l /* 200000 * 2us */
#define DELAY_SEEKREAD 20000l /* 20000 * 1us */
#define mcd_delay DELAY
int mcd_attach(struct isa_device *dev)
{
struct mcd_data *cd = mcd_data + dev->id_unit;
int i;
cd->iobase = dev->id_iobase;
cd->flags |= MCDINIT;
cd->openflags = 0;
for (i=0; i<MAXPARTITIONS; i++) cd->partflags[i] = 0;
#ifdef NOTYET
/* wire controller for interrupts and dma */
mcd_configure(cd);
#endif
return 1;
}
int mcdopen(dev_t dev)
{
int unit,part,phys;
struct mcd_data *cd;
unit = mcd_unit(dev);
if (unit >= NMCD)
return ENXIO;
cd = mcd_data + unit;
part = mcd_part(dev);
phys = mcd_phys(dev);
/* not initialized*/
if (!(cd->flags & MCDINIT))
return ENXIO;
/* invalidated in the meantime? mark all open part's invalid */
if (!(cd->flags & MCDVALID) && cd->openflags)
return ENXIO;
if (mcd_getstat(unit,1) < 0)
return ENXIO;
/* XXX get a default disklabel */
mcd_getdisklabel(unit);
if (mcdsize(dev) < 0) {
printf("mcd%d: failed to get disk size\n",unit);
return ENXIO;
} else
cd->flags |= MCDVALID;
MCD_TRACE("open: partition=%d, disksize = %d, blksize=%d\n",
part,cd->disksize,cd->blksize,0);
if (part == RAW_PART ||
(part < cd->dlabel.d_npartitions &&
cd->dlabel.d_partitions[part].p_fstype != FS_UNUSED)) {
cd->partflags[part] |= MCDOPEN;
cd->openflags |= (1<<part);
if (part == RAW_PART && phys != 0)
cd->partflags[part] |= MCDREADRAW;
return 0;
}
return ENXIO;
}
int mcdclose(dev_t dev)
{
int unit,part,phys;
struct mcd_data *cd;
unit = mcd_unit(dev);
if (unit >= NMCD)
return ENXIO;
cd = mcd_data + unit;
part = mcd_part(dev);
phys = mcd_phys(dev);
if (!(cd->flags & MCDINIT))
return ENXIO;
mcd_getstat(unit,1); /* get status */
/* close channel */
cd->partflags[part] &= ~(MCDOPEN|MCDREADRAW);
cd->openflags &= ~(1<<part);
MCD_TRACE("close: partition=%d\n",part,0,0,0);
return 0;
}
void
mcdstrategy(struct buf *bp)
{
struct mcd_data *cd;
struct buf *qp;
int s;
int unit = mcd_unit(bp->b_dev);
cd = mcd_data + unit;
/* test validity */
/*MCD_TRACE("strategy: buf=0x%lx, unit=%ld, block#=%ld bcount=%ld\n",
bp,unit,bp->b_blkno,bp->b_bcount);*/
if (unit >= NMCD || bp->b_blkno < 0) {
printf("mcdstrategy: unit = %d, blkno = %d, bcount = %d\n",
unit, bp->b_blkno, bp->b_bcount);
pg("mcd: mcdstratregy failure");
bp->b_error = EINVAL;
bp->b_flags |= B_ERROR;
goto bad;
}
/* if device invalidated (e.g. media change, door open), error */
if (!(cd->flags & MCDVALID)) {
MCD_TRACE("strategy: drive not valid\n",0,0,0,0);
bp->b_error = EIO;
goto bad;
}
/* read only */
if (!(bp->b_flags & B_READ)) {
bp->b_error = EROFS;
goto bad;
}
/* no data to read */
if (bp->b_bcount == 0)
goto done;
/* for non raw access, check partition limits */
if (mcd_part(bp->b_dev) != RAW_PART) {
if (!(cd->flags & MCDLABEL)) {
bp->b_error = EIO;
goto bad;
}
/* adjust transfer if necessary */
if (bounds_check_with_label(bp,&cd->dlabel,1) <= 0) {
goto done;
}
}
/* queue it */
qp = &cd->head;
s = splbio();
disksort(qp,bp);
splx(s);
/* now check whether we can perform processing */
mcd_start(unit);
return;
bad:
bp->b_flags |= B_ERROR;
done:
bp->b_resid = bp->b_bcount;
biodone(bp);
return;
}
static void mcd_start(int unit)
{
struct mcd_data *cd = mcd_data + unit;
struct buf *bp, *qp = &cd->head;
struct partition *p;
int part;
register s = splbio();
if (cd->flags & MCDMBXBSY)
return;
if ((bp = qp->b_actf) != 0) {
/* block found to process, dequeue */
/*MCD_TRACE("mcd_start: found block bp=0x%x\n",bp,0,0,0);*/
qp->b_actf = bp->av_forw;
splx(s);
} else {
/* nothing to do */
splx(s);
return;
}
/* changed media? */
if (!(cd->flags & MCDVALID)) {
MCD_TRACE("mcd_start: drive not valid\n",0,0,0,0);
return;
}
p = cd->dlabel.d_partitions + mcd_part(bp->b_dev);
cd->flags |= MCDMBXBSY;
cd->mbx.unit = unit;
cd->mbx.port = cd->iobase;
cd->mbx.retry = MCD_RETRYS;
cd->mbx.bp = bp;
cd->mbx.p_offset = p->p_offset;
/* calling the read routine */
mcd_doread(MCD_S_BEGIN,&(cd->mbx));
/* triggers mcd_start, when successful finished */
return;
}
int mcdioctl(dev_t dev, int cmd, caddr_t addr, int flags)
{
struct mcd_data *cd;
int unit,part;
unit = mcd_unit(dev);
part = mcd_part(dev);
cd = mcd_data + unit;
#ifdef MCDMINI
return ENOTTY;
#else
if (!(cd->flags & MCDVALID))
return EIO;
MCD_TRACE("ioctl called 0x%x\n",cmd,0,0,0);
switch (cmd) {
case DIOCSBAD:
return EINVAL;
case DIOCGDINFO:
case DIOCGPART:
case DIOCWDINFO:
case DIOCSDINFO:
case DIOCWLABEL:
return ENOTTY;
case CDIOCPLAYTRACKS:
return mcd_playtracks(unit, (struct ioc_play_track *) addr);
case CDIOCPLAYBLOCKS:
return mcd_play(unit, (struct mcd_read2 *) addr);
case CDIOCREADSUBCHANNEL:
return mcd_subchan(unit, (struct ioc_read_subchannel *) addr);
case CDIOREADTOCHEADER:
return mcd_toc_header(unit, (struct ioc_toc_header *) addr);
case CDIOREADTOCENTRYS:
return mcd_toc_entry(unit, (struct ioc_read_toc_entry *) addr);
case CDIOCSETPATCH:
case CDIOCGETVOL:
case CDIOCSETVOL:
case CDIOCSETMONO:
case CDIOCSETSTERIO:
case CDIOCSETMUTE:
case CDIOCSETLEFT:
case CDIOCSETRIGHT:
return EINVAL;
case CDIOCRESUME:
return mcd_resume(unit);
case CDIOCPAUSE:
return mcd_pause(unit);
case CDIOCSTART:
return EINVAL;
case CDIOCSTOP:
return mcd_stop(unit);
case CDIOCEJECT:
return EINVAL;
case CDIOCSETDEBUG:
cd->debug = 1;
return 0;
case CDIOCCLRDEBUG:
cd->debug = 0;
return 0;
case CDIOCRESET:
return EINVAL;
default:
return ENOTTY;
}
/*NOTREACHED*/
#endif /*!MCDMINI*/
}
/* this could have been taken from scsi/cd.c, but it is not clear
* whether the scsi cd driver is linked in
*/
static int mcd_getdisklabel(int unit)
{
struct mcd_data *cd = mcd_data + unit;
if (cd->flags & MCDLABEL)
return -1;
bzero(&cd->dlabel,sizeof(struct disklabel));
strncpy(cd->dlabel.d_typename,"Mitsumi CD ROM ",16);
strncpy(cd->dlabel.d_packname,"unknown ",16);
cd->dlabel.d_secsize = cd->blksize;
cd->dlabel.d_nsectors = 100;
cd->dlabel.d_ntracks = 1;
cd->dlabel.d_ncylinders = (cd->disksize/100)+1;
cd->dlabel.d_secpercyl = 100;
cd->dlabel.d_secperunit = cd->disksize;
cd->dlabel.d_rpm = 300;
cd->dlabel.d_interleave = 1;
cd->dlabel.d_flags = D_REMOVABLE;
cd->dlabel.d_npartitions= 1;
cd->dlabel.d_partitions[0].p_offset = 0;
cd->dlabel.d_partitions[0].p_size = cd->disksize;
cd->dlabel.d_partitions[0].p_fstype = 9;
cd->dlabel.d_magic = DISKMAGIC;
cd->dlabel.d_magic2 = DISKMAGIC;
cd->dlabel.d_checksum = dkcksum(&cd->dlabel);
cd->flags |= MCDLABEL;
return 0;
}
int mcdsize(dev_t dev)
{
int size;
int unit = mcd_unit(dev);
struct mcd_data *cd = mcd_data + unit;
if (mcd_volinfo(unit) >= 0) {
cd->blksize = MCDBLK;
size = msf2hsg(cd->volinfo.vol_msf);
cd->disksize = size * (MCDBLK/DEV_BSIZE);
return 0;
}
return -1;
}
/***************************************************************
* lower level of driver starts here
**************************************************************/
#ifdef NOTDEF
static char irqs[] = {
0x00,0x00,0x10,0x20,0x00,0x30,0x00,0x00,
0x00,0x10,0x40,0x50,0x00,0x00,0x00,0x00
};
static char drqs[] = {
0x00,0x01,0x00,0x03,0x00,0x05,0x06,0x07,
};
#endif
static void mcd_configure(struct mcd_data *cd)
{
outb(cd->iobase+mcd_config,cd->config);
}
/* check if there is a cdrom */
/* Heavly hacked by gclarkii@sugar.neosoft.com */
int mcd_probe(struct isa_device *dev)
{
int port = dev->id_iobase;
int unit = dev->id_unit;
int i;
int st;
int check;
int junk;
mcd_data[unit].flags = MCDPROBING;
#ifdef NOTDEF
/* get irq/drq configuration word */
mcd_data[unit].config = irqs[dev->id_irq]; /* | drqs[dev->id_drq];*/
#else
mcd_data[unit].config = 0;
#endif
/* send a reset */
outb(port+MCD_FLAGS,0);
DELAY(100000);
/* get any pending status and throw away...*/
for (i=10; i != 0; i--) {
inb(port+MCD_DATA);
}
DELAY(1000);
outb(port+MCD_DATA,MCD_CMDGETSTAT); /* Send get status command */
/* Loop looking for avail of status */
/* XXX May have to increase for fast machinces */
for (i = 1000; i != 0; i--) {
if ((inb(port+MCD_FLAGS) & 0xF ) == STATUS_AVAIL) {
break;
}
DELAY(10);
}
/* get status */
if (i == 0) {
#ifdef DEBUG
printf ("Mitsumi drive NOT detected\n");
#endif
return 0;
}
/*
* The following code uses the 0xDC command, it returns a M from the
* second byte and a number in the third. Does anyone know what the
* number is for? Better yet, how about someone thats REAL good in
* i80x86 asm looking at the Dos driver... Most of this info came
* from a friend of mine spending a whole weekend.....
*/
DELAY (2000);
outb(port+MCD_DATA,MCD_CMDCONTINFO);
for (i = 0; i < 100000; i++) {
if ((inb(port+MCD_FLAGS) & 0xF) == STATUS_AVAIL)
break;
}
if (i > 100000) {
#ifdef DEBUG
printf ("Mitsumi drive error\n");
#endif
return 0;
}
DELAY (40000);
st = inb(port+MCD_DATA);
DELAY (500);
check = inb(port+MCD_DATA);
DELAY (500);
junk = inb(port+MCD_DATA); /* What is byte used for?!?!? */
if (check = 'M') {
#ifdef DEBUG
printf("Mitsumi drive detected\n");
#endif
return 4;
} else {
printf("Mitsumi drive NOT detected\n");
printf("Mitsumi drive error\n");
return 0;
}
}
static int mcd_waitrdy(int port,int dly)
{
int i;
/* wait until xfer port senses data ready */
for (i=0; i<dly; i++) {
if ((inb(port+mcd_xfer) & MCD_ST_BUSY)==0)
return 0;
mcd_delay(1);
}
return -1;
}
static int mcd_getreply(int unit,int dly)
{
int i;
struct mcd_data *cd = mcd_data + unit;
int port = cd->iobase;
/* wait data to become ready */
if (mcd_waitrdy(port,dly)<0) {
#ifdef MCD_TO_WARNING_ON
printf("mcd%d: timeout getreply\n",unit);
#endif
return -1;
}
/* get the data */
return inb(port+mcd_status) & 0xFF;
}
static int mcd_getstat(int unit,int sflg)
{
int i;
struct mcd_data *cd = mcd_data + unit;
int port = cd->iobase;
/* get the status */
if (sflg)
outb(port+mcd_command, MCD_CMDGETSTAT);
i = mcd_getreply(unit,DELAY_GETREPLY);
if (i<0) return -1;
cd->status = i;
mcd_setflags(unit,cd);
return cd->status;
}
static void mcd_setflags(int unit, struct mcd_data *cd)
{
/* check flags */
if (cd->status & (MCDDSKCHNG|MCDDOOROPEN)) {
MCD_TRACE("getstat: sensed DSKCHNG or DOOROPEN\n",0,0,0,0);
cd->flags &= ~MCDVALID;
}
#ifndef MCDMINI
if (cd->status & MCDAUDIOBSY)
cd->audio_status = CD_AS_PLAY_IN_PROGRESS;
else if (cd->audio_status == CD_AS_PLAY_IN_PROGRESS)
cd->audio_status = CD_AS_PLAY_COMPLETED;
#endif
}
static int mcd_get(int unit, char *buf, int nmax)
{
int port = mcd_data[unit].iobase;
int i,k;
for (i=0; i<nmax; i++) {
/* wait for data */
if ((k = mcd_getreply(unit,DELAY_GETREPLY)) < 0) {
#ifdef MCD_TO_WARNING_ON
printf("mcd%d: timeout mcd_get\n",unit);
#endif
return -1;
}
buf[i] = k;
}
return i;
}
static int mcd_send(int unit, int cmd,int nretrys)
{
int i,k;
int port = mcd_data[unit].iobase;
/*MCD_TRACE("mcd_send: command = 0x%x\n",cmd,0,0,0);*/
for (i=0; i<nretrys; i++) {
outb(port+mcd_command, cmd);
if ((k=mcd_getstat(unit,0)) != -1)
break;
}
if (i == nretrys) {
printf("mcd%d: mcd_send retry cnt exceeded\n",unit);
return -1;
}
/*MCD_TRACE("mcd_send: status = 0x%x\n",k,0,0,0);*/
return 0;
}
static int bcd2bin(bcd_t b)
{
return (b >> 4) * 10 + (b & 15);
}
static bcd_t bin2bcd(int b)
{
return ((b / 10) << 4) | (b % 10);
}
static void hsg2msf(int hsg, bcd_t *msf)
{
hsg += 150;
M_msf(msf) = bin2bcd(hsg / 4500);
hsg %= 4500;
S_msf(msf) = bin2bcd(hsg / 75);
F_msf(msf) = bin2bcd(hsg % 75);
}
static int msf2hsg(bcd_t *msf)
{
return (bcd2bin(M_msf(msf)) * 60 +
bcd2bin(S_msf(msf))) * 75 +
bcd2bin(F_msf(msf)) - 150;
}
static int mcd_volinfo(int unit)
{
struct mcd_data *cd = mcd_data + unit;
int i;
/*MCD_TRACE("mcd_volinfo: enter\n",0,0,0,0);*/
/* Get the status, in case the disc has been changed */
if (mcd_getstat(unit, 1) < 0) return EIO;
/* Just return if we already have it */
if (cd->flags & MCDVOLINFO) return 0;
/* send volume info command */
if (mcd_send(unit,MCD_CMDGETVOLINFO,MCD_RETRYS) < 0)
return -1;
/* get data */
if (mcd_get(unit,(char*) &cd->volinfo,sizeof(struct mcd_volinfo)) < 0) {
printf("mcd%d: mcd_volinfo: error read data\n",unit);
return -1;
}
if (cd->volinfo.trk_low != 0 || cd->volinfo.trk_high != 0) {
cd->flags |= MCDVOLINFO; /* volinfo is OK */
return 0;
}
return -1;
}
void
mcdintr(unit)
int unit;
{
int port = mcd_data[unit].iobase;
u_int i;
MCD_TRACE("stray interrupt xfer=0x%x\n",inb(port+mcd_xfer),0,0,0);
/* just read out status and ignore the rest */
if ((inb(port+mcd_xfer)&0xFF) != 0xFF) {
i = inb(port+mcd_status);
}
}
/* state machine to process read requests
* initialize with MCD_S_BEGIN: calculate sizes, and read status
* MCD_S_WAITSTAT: wait for status reply, set mode
* MCD_S_WAITMODE: waits for status reply from set mode, set read command
* MCD_S_WAITREAD: wait for read ready, read data
*/
static struct mcd_mbx *mbxsave;
static void mcd_doread(int state, struct mcd_mbx *mbxin)
{
struct mcd_mbx *mbx = (state!=MCD_S_BEGIN) ? mbxsave : mbxin;
int unit = mbx->unit;
int port = mbx->port;
struct buf *bp = mbx->bp;
struct mcd_data *cd = mcd_data + unit;
int rm,i,k;
struct mcd_read2 rbuf;
int blknum;
caddr_t addr;
loop:
switch (state) {
case MCD_S_BEGIN:
mbx = mbxsave = mbxin;
case MCD_S_BEGIN1:
/* get status */
outb(port+mcd_command, MCD_CMDGETSTAT);
mbx->count = RDELAY_WAITSTAT;
timeout((timeout_func_t)mcd_doread,(caddr_t)MCD_S_WAITSTAT,hz/100); /* XXX */
return;
case MCD_S_WAITSTAT:
untimeout(mcd_doread,MCD_S_WAITSTAT);
if (mbx->count-- >= 0) {
if (inb(port+mcd_xfer) & MCD_ST_BUSY) {
timeout((timeout_func_t)mcd_doread,(caddr_t)MCD_S_WAITSTAT,hz/100); /* XXX */
return;
}
mcd_setflags(unit,cd);
MCD_TRACE("got WAITSTAT delay=%d\n",RDELAY_WAITSTAT-mbx->count,0,0,0);
/* reject, if audio active */
if (cd->status & MCDAUDIOBSY) {
printf("mcd%d: audio is active\n",unit);
goto readerr;
}
/* to check for raw/cooked mode */
if (cd->flags & MCDREADRAW) {
rm = MCD_MD_RAW;
mbx->sz = MCDRBLK;
} else {
rm = MCD_MD_COOKED;
mbx->sz = cd->blksize;
}
mbx->count = RDELAY_WAITMODE;
mcd_put(port+mcd_command, MCD_CMDSETMODE);
mcd_put(port+mcd_command, rm);
timeout((timeout_func_t)mcd_doread,(caddr_t)MCD_S_WAITMODE,hz/100); /* XXX */
return;
} else {
#ifdef MCD_TO_WARNING_ON
printf("mcd%d: timeout getstatus\n",unit);
#endif
goto readerr;
}
case MCD_S_WAITMODE:
untimeout(mcd_doread,MCD_S_WAITMODE);
if (mbx->count-- < 0) {
#ifdef MCD_TO_WARNING_ON
printf("mcd%d: timeout set mode\n",unit);
#endif
goto readerr;
}
if (inb(port+mcd_xfer) & MCD_ST_BUSY) {
timeout((timeout_func_t)mcd_doread,(caddr_t)MCD_S_WAITMODE,hz/100);
return;
}
mcd_setflags(unit,cd);
MCD_TRACE("got WAITMODE delay=%d\n",RDELAY_WAITMODE-mbx->count,0,0,0);
/* for first block */
mbx->nblk = (bp->b_bcount + (mbx->sz-1)) / mbx->sz;
mbx->skip = 0;
nextblock:
blknum = (bp->b_blkno / (mbx->sz/DEV_BSIZE))
+ mbx->p_offset + mbx->skip/mbx->sz;
MCD_TRACE("mcd_doread: read blknum=%d for bp=0x%x\n",blknum,bp,0,0);
/* build parameter block */
hsg2msf(blknum,rbuf.start_msf);
/* send the read command */
mcd_put(port+mcd_command,MCD_CMDREAD2);
mcd_put(port+mcd_command,rbuf.start_msf[0]);
mcd_put(port+mcd_command,rbuf.start_msf[1]);
mcd_put(port+mcd_command,rbuf.start_msf[2]);
mcd_put(port+mcd_command,0);
mcd_put(port+mcd_command,0);
mcd_put(port+mcd_command,1);
mbx->count = RDELAY_WAITREAD;
timeout((timeout_func_t)mcd_doread,(caddr_t)MCD_S_WAITREAD,hz/100); /* XXX */
return;
case MCD_S_WAITREAD:
untimeout(mcd_doread,MCD_S_WAITREAD);
if (mbx->count-- > 0) {
k = inb(port+mcd_xfer);
if ((k & 2)==0) {
MCD_TRACE("got data delay=%d\n",RDELAY_WAITREAD-mbx->count,0,0,0);
/* data is ready */
addr = bp->b_un.b_addr + mbx->skip;
outb(port+mcd_ctl2,0x04); /* XXX */
for (i=0; i<mbx->sz; i++)
*addr++ = inb(port+mcd_rdata);
outb(port+mcd_ctl2,0x0c); /* XXX */
if (--mbx->nblk > 0) {
mbx->skip += mbx->sz;
goto nextblock;
}
/* return buffer */
bp->b_resid = 0;
biodone(bp);
cd->flags &= ~MCDMBXBSY;
mcd_start(mbx->unit);
return;
}
if ((k & 4)==0)
mcd_getstat(unit,0);
timeout((timeout_func_t)mcd_doread,(caddr_t)MCD_S_WAITREAD,hz/100); /* XXX */
return;
} else {
#ifdef MCD_TO_WARNING_ON
printf("mcd%d: timeout read data\n",unit);
#endif
goto readerr;
}
}
readerr:
if (mbx->retry-- > 0) {
#ifdef MCD_TO_WARNING_ON
printf("mcd%d: retrying\n",unit);
#endif
state = MCD_S_BEGIN1;
goto loop;
}
/* invalidate the buffer */
bp->b_flags |= B_ERROR;
bp->b_resid = bp->b_bcount;
biodone(bp);
mcd_start(mbx->unit);
return;
#ifdef NOTDEF
printf("mcd%d: unit timeout, resetting\n",mbx->unit);
outb(mbx->port+mcd_reset,MCD_CMDRESET);
DELAY(300000);
(void)mcd_getstat(mbx->unit,1);
(void)mcd_getstat(mbx->unit,1);
/*cd->status &= ~MCDDSKCHNG; */
cd->debug = 1; /* preventive set debug mode */
#endif
}
#ifndef MCDMINI
static int mcd_setmode(int unit, int mode)
{
struct mcd_data *cd = mcd_data + unit;
int port = cd->iobase;
int retry;
printf("mcd%d: setting mode to %d\n", unit, mode);
for(retry=0; retry<MCD_RETRYS; retry++)
{
outb(port+mcd_command, MCD_CMDSETMODE);
outb(port+mcd_command, mode);
if (mcd_getstat(unit, 0) != -1) return 0;
}
return -1;
}
static int mcd_toc_header(int unit, struct ioc_toc_header *th)
{
struct mcd_data *cd = mcd_data + unit;
if (mcd_volinfo(unit) < 0)
return ENXIO;
th->len = msf2hsg(cd->volinfo.vol_msf);
th->starting_track = bcd2bin(cd->volinfo.trk_low);
th->ending_track = bcd2bin(cd->volinfo.trk_high);
return 0;
}
static int mcd_read_toc(int unit)
{
struct mcd_data *cd = mcd_data + unit;
struct ioc_toc_header th;
struct mcd_qchninfo q;
int rc, trk, idx, retry;
/* Only read TOC if needed */
if (cd->flags & MCDTOC) return 0;
printf("mcd%d: reading toc header\n", unit);
if (mcd_toc_header(unit, &th) != 0)
return ENXIO;
printf("mcd%d: stopping play\n", unit);
if ((rc=mcd_stop(unit)) != 0)
return rc;
/* try setting the mode twice */
if (mcd_setmode(unit, MCD_MD_TOC) != 0)
return EIO;
if (mcd_setmode(unit, MCD_MD_TOC) != 0)
return EIO;
printf("mcd%d: get_toc reading qchannel info\n",unit);
for(trk=th.starting_track; trk<=th.ending_track; trk++)
cd->toc[trk].idx_no = 0;
trk = th.ending_track - th.starting_track + 1;
for(retry=0; retry<300 && trk>0; retry++)
{
if (mcd_getqchan(unit, &q) < 0) break;
idx = bcd2bin(q.idx_no);
if (idx>0 && idx < MCD_MAXTOCS && q.trk_no==0)
if (cd->toc[idx].idx_no == 0)
{
cd->toc[idx] = q;
trk--;
}
}
if (mcd_setmode(unit, MCD_MD_COOKED) != 0)
return EIO;
if (trk != 0) return ENXIO;
/* add a fake last+1 */
idx = th.ending_track + 1;
cd->toc[idx].ctrl_adr = cd->toc[idx-1].ctrl_adr;
cd->toc[idx].trk_no = 0;
cd->toc[idx].idx_no = 0xAA;
cd->toc[idx].hd_pos_msf[0] = cd->volinfo.vol_msf[0];
cd->toc[idx].hd_pos_msf[1] = cd->volinfo.vol_msf[1];
cd->toc[idx].hd_pos_msf[2] = cd->volinfo.vol_msf[2];
cd->flags |= MCDTOC;
return 0;
}
static int mcd_toc_entry(int unit, struct ioc_read_toc_entry *te)
{
struct mcd_data *cd = mcd_data + unit;
struct ret_toc
{
struct ioc_toc_header th;
struct cd_toc_entry rt;
} ret_toc;
struct ioc_toc_header th;
int rc, i;
/* Make sure we have a valid toc */
if ((rc=mcd_read_toc(unit)) != 0)
return rc;
/* find the toc to copy*/
i = te->starting_track;
if (i == MCD_LASTPLUS1)
i = bcd2bin(cd->volinfo.trk_high) + 1;
/* verify starting track */
if (i < bcd2bin(cd->volinfo.trk_low) ||
i > bcd2bin(cd->volinfo.trk_high)+1)
return EINVAL;
/* do we have room */
if (te->data_len < sizeof(struct ioc_toc_header) +
sizeof(struct cd_toc_entry)) return EINVAL;
/* Copy the toc header */
if (mcd_toc_header(unit, &th) < 0) return EIO;
ret_toc.th = th;
/* copy the toc data */
ret_toc.rt.control = cd->toc[i].ctrl_adr;
ret_toc.rt.addr_type = te->address_format;
ret_toc.rt.track = i;
if (te->address_format == CD_MSF_FORMAT)
{
ret_toc.rt.addr[1] = cd->toc[i].hd_pos_msf[0];
ret_toc.rt.addr[2] = cd->toc[i].hd_pos_msf[1];
ret_toc.rt.addr[3] = cd->toc[i].hd_pos_msf[2];
}
/* copy the data back */
copyout(&ret_toc, te->data, sizeof(struct cd_toc_entry)
+ sizeof(struct ioc_toc_header));
return 0;
}
static int mcd_stop(int unit)
{
struct mcd_data *cd = mcd_data + unit;
if (mcd_send(unit, MCD_CMDSTOPAUDIO, MCD_RETRYS) < 0)
return ENXIO;
cd->audio_status = CD_AS_PLAY_COMPLETED;
return 0;
}
static int mcd_getqchan(int unit, struct mcd_qchninfo *q)
{
struct mcd_data *cd = mcd_data + unit;
if (mcd_send(unit, MCD_CMDGETQCHN, MCD_RETRYS) < 0)
return -1;
if (mcd_get(unit, (char *) q, sizeof(struct mcd_qchninfo)) < 0)
return -1;
if (cd->debug)
printf("mcd%d: qchannel ctl=%d, t=%d, i=%d, ttm=%d:%d.%d dtm=%d:%d.%d\n",
unit,
q->ctrl_adr, q->trk_no, q->idx_no,
q->trk_size_msf[0], q->trk_size_msf[1], q->trk_size_msf[2],
q->trk_size_msf[0], q->trk_size_msf[1], q->trk_size_msf[2]);
return 0;
}
static int mcd_subchan(int unit, struct ioc_read_subchannel *sc)
{
struct mcd_data *cd = mcd_data + unit;
struct mcd_qchninfo q;
struct cd_sub_channel_info data;
printf("mcd%d: subchan af=%d, df=%d\n", unit,
sc->address_format,
sc->data_format);
if (sc->address_format != CD_MSF_FORMAT) return EIO;
if (sc->data_format != CD_CURRENT_POSITION) return EIO;
if (mcd_getqchan(unit, &q) < 0) return EIO;
data.header.audio_status = cd->audio_status;
data.what.position.data_format = CD_MSF_FORMAT;
data.what.position.track_number = bcd2bin(q.trk_no);
if (copyout(&data, sc->data, sizeof(struct cd_sub_channel_info))!=0)
return EFAULT;
return 0;
}
static int mcd_playtracks(int unit, struct ioc_play_track *pt)
{
struct mcd_data *cd = mcd_data + unit;
struct mcd_read2 pb;
int a = pt->start_track;
int z = pt->end_track;
int rc;
if ((rc = mcd_read_toc(unit)) != 0) return rc;
printf("mcd%d: playtracks from %d:%d to %d:%d\n", unit,
a, pt->start_index, z, pt->end_index);
if (a < cd->volinfo.trk_low || a > cd->volinfo.trk_high || a > z ||
z < cd->volinfo.trk_low || z > cd->volinfo.trk_high)
return EINVAL;
pb.start_msf[0] = cd->toc[a].hd_pos_msf[0];
pb.start_msf[1] = cd->toc[a].hd_pos_msf[1];
pb.start_msf[2] = cd->toc[a].hd_pos_msf[2];
pb.end_msf[0] = cd->toc[z+1].hd_pos_msf[0];
pb.end_msf[1] = cd->toc[z+1].hd_pos_msf[1];
pb.end_msf[2] = cd->toc[z+1].hd_pos_msf[2];
return mcd_play(unit, &pb);
}
static int mcd_play(int unit, struct mcd_read2 *pb)
{
struct mcd_data *cd = mcd_data + unit;
int port = cd->iobase;
int retry, st;
cd->lastpb = *pb;
for(retry=0; retry<MCD_RETRYS; retry++)
{
outb(port+mcd_command, MCD_CMDREAD2);
outb(port+mcd_command, pb->start_msf[0]);
outb(port+mcd_command, pb->start_msf[1]);
outb(port+mcd_command, pb->start_msf[2]);
outb(port+mcd_command, pb->end_msf[0]);
outb(port+mcd_command, pb->end_msf[1]);
outb(port+mcd_command, pb->end_msf[2]);
if ((st=mcd_getstat(unit, 0)) != -1) break;
}
if (cd->debug)
printf("mcd%d: mcd_play retry=%d, status=%d\n", unit, retry, st);
if (st == -1) return ENXIO;
cd->audio_status = CD_AS_PLAY_IN_PROGRESS;
return 0;
}
static int mcd_pause(int unit)
{
struct mcd_data *cd = mcd_data + unit;
struct mcd_qchninfo q;
int rc;
/* Verify current status */
if (cd->audio_status != CD_AS_PLAY_IN_PROGRESS)
{
printf("mcd%d: pause attempted when not playing\n", unit);
return EINVAL;
}
/* Get the current position */
if (mcd_getqchan(unit, &q) < 0) return EIO;
/* Copy it into lastpb */
cd->lastpb.start_msf[0] = q.hd_pos_msf[0];
cd->lastpb.start_msf[1] = q.hd_pos_msf[1];
cd->lastpb.start_msf[2] = q.hd_pos_msf[2];
/* Stop playing */
if ((rc=mcd_stop(unit)) != 0) return rc;
/* Set the proper status and exit */
cd->audio_status = CD_AS_PLAY_PAUSED;
return 0;
}
static int mcd_resume(int unit)
{
struct mcd_data *cd = mcd_data + unit;
if (cd->audio_status != CD_AS_PLAY_PAUSED) return EINVAL;
return mcd_play(unit, &cd->lastpb);
}
#endif /*!MCDMINI*/
#endif /* NMCD > 0 */
Continuous source code history from original PDP-7 UNIX to FreeBSD 2, the first fully unencumbered FreeBSD release.