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87f6c6625d
freebsd/sys/i386/isa/scd.c
Julian Elischer 87f6c6625d Pass 3 of the great devsw changes 
most devsw referenced functions are now static, as they are
in the same file as their devsw structure. I've also added DEVFS
support for nearly every device in the system, however
many of the devices have 'incorrect' names under DEVFS
because I couldn't quickly work out the correct naming conventions.
(but devfs won't be coming on line for a month or so anyhow so that doesn't
matter)

If you "OWN" a device which would normally have an entry in /dev
then search for the devfs_add_devsw() entries and munge to make them right..
check out similar devices to see what I might have done in them in you
can't see what's going on..
for a laugh compare conf.c conf.h defore and after... :)
I have not doen DEVFS entries for any DISKSLICE devices yet as that will be
a much more complicated job.. (pass 5 :)

pass 4 will be to make the devsw tables of type (cdevsw * )
rather than (cdevsw)
seems to work here..
complaints to the usual places.. :)
1995-12-08 11:19:42 +00:00

1596 lines
37 KiB
C
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/*-
* Copyright (c) 1995 Mikael Hybsch
* All rights reserved.
*
* Portions of this file are copied from mcd.c
* which has the following copyrights:
*
* Copyright 1993 by Holger Veit (data part)
* Copyright 1993 by Brian Moore (audio part)
* Changes Copyright 1993 by Gary Clark II
* Changes Copyright (C) 1994 by Andrew A. Chernov
*
* Rewrote probe routine to work on newer Mitsumi drives.
* Additional changes (C) 1994 by Jordan K. Hubbard
*
* 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
* in this position and unchanged.
* 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. The name of the author may not be used to endorse or promote products
* derived from this software withough specific prior written permission
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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: scd.c,v 1.12 1995/11/29 14:39:53 julian Exp $ */
/* Please send any comments to micke@dynas.se */
#define SCD_DEBUG 0
#include "scd.h"
#if NSCD > 0
#include <sys/types.h>
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/conf.h>
#include <sys/file.h>
#include <sys/buf.h>
#include <sys/proc.h>
#include <sys/stat.h>
#include <sys/uio.h>
#include <sys/ioctl.h>
#include <sys/cdio.h>
#include <sys/errno.h>
#include <sys/dkbad.h>
#include <sys/disklabel.h>
#include <sys/devconf.h>
#include <sys/kernel.h>
#ifdef DEVFS
#include <sys/devfsext.h>
#endif /*DEVFS*/
#include <machine/clock.h>
#include <machine/stdarg.h>
#include <i386/isa/isa.h>
#include <i386/isa/isa_device.h>
#include <i386/isa/scdreg.h>
#define scd_part(dev) ((minor(dev)) & 7)
#define scd_unit(dev) (((minor(dev)) & 0x38) >> 3)
#define scd_phys(dev) (((minor(dev)) & 0x40) >> 6)
#define RAW_PART 2
/* flags */
#define SCDOPEN 0x0001 /* device opened */
#define SCDVALID 0x0002 /* parameters loaded */
#define SCDINIT 0x0004 /* device is init'd */
#define SCDPROBING 0x0020 /* probing */
#define SCDTOC 0x0100 /* already read toc */
#define SCDMBXBSY 0x0200 /* local mbx is busy */
#define SCDSPINNING 0x0400 /* drive is spun up */
#define SCD_S_BEGIN 0
#define SCD_S_BEGIN1 1
#define SCD_S_WAITSTAT 2
#define SCD_S_WAITFIFO 3
#define SCD_S_WAITSPIN 4
#define SCD_S_WAITREAD 5
#define SCD_S_WAITPARAM 6
#define RDELAY_WAIT 300
#define RDELAY_WAITREAD 300
#define SCDBLKSIZE 2048
#ifdef SCD_DEBUG
static int scd_debuglevel = SCD_DEBUG;
# define XDEBUG(level, data) {if (scd_debuglevel >= level) printf data;}
#else
# define XDEBUG(level, data)
#endif
struct scd_mbx {
short unit;
short port;
short retry;
short nblk;
int sz;
u_long skip;
struct buf *bp;
int p_offset;
short count;
};
static struct scd_data {
int iobase;
char double_speed;
char *name;
short flags;
int blksize;
u_long disksize;
struct disklabel dlabel;
int openflag;
struct {
unsigned char adr :4;
unsigned char ctl :4; /* xcdplayer needs this */
unsigned char start_msf[3];
} toc[MAX_TRACKS];
short first_track;
short last_track;
struct ioc_play_msf last_play;
short audio_status;
struct buf head; /* head of buf queue */
struct scd_mbx mbx;
#ifdef DEVFS
void *ra_devfs_token;
void *rc_devfs_token;
void *a_devfs_token;
void *c_devfs_token;
#endif
} scd_data[NSCD];
/* prototypes */
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 void process_attention(unsigned unit);
static inline void write_control(unsigned port, unsigned data);
static int waitfor_status_bits(int unit, int bits_set, int bits_clear);
static int send_cmd(u_int unit, u_char cmd, u_int nargs, ...);
static void init_drive(unsigned unit);
static int spin_up(unsigned unit);
static int read_toc(dev_t dev);
static int get_result(u_int unit, int result_len, u_char *result);
static void print_error(int unit, int errcode);
static void scd_start(int unit);
static void scd_doread(int state, struct scd_mbx *mbxin);
static int scd_eject(int unit);
static int scd_stop(int unit);
static int scd_pause(int unit);
static int scd_resume(int unit);
static int scd_playtracks(int unit, struct ioc_play_track *pt);
static int scd_playmsf(int unit, struct ioc_play_msf *msf);
static int scd_play(int unit, struct ioc_play_msf *msf);
static int scd_subchan(int unit, struct ioc_read_subchannel *sc);
static int read_subcode(int unit, struct sony_subchannel_position_data *sc);
/* for xcdplayer */
static int scd_toc_header(int unit, struct ioc_toc_header *th);
static int scd_toc_entrys(int unit, struct ioc_read_toc_entry *te);
#define SCD_LASTPLUS1 170 /* don't ask, xcdplayer passes this in */
static int scd_probe(struct isa_device *dev);
static int scd_attach(struct isa_device *dev);
struct isa_driver scddriver = { scd_probe, scd_attach, "scd" };
static d_open_t scdopen;
static d_close_t scdclose;
static d_ioctl_t scdioctl;
static d_psize_t scdsize;
static d_strategy_t scdstrategy;
#define CDEV_MAJOR 45
#define BDEV_MAJOR 16
extern struct cdevsw scd_cdevsw;
struct bdevsw scd_bdevsw =
{ scdopen, scdclose, scdstrategy, scdioctl, /*16*/
nxdump, scdsize, 0, "scd", &scd_cdevsw, -1 };
struct cdevsw scd_cdevsw =
{ scdopen, scdclose, rawread, nowrite, /*45*/
scdioctl, nostop, nullreset, nodevtotty,/* sony cd */
seltrue, nommap, scdstrategy, "scd",
&scd_bdevsw, -1 };
static struct kern_devconf kdc_scd[NSCD] = { {
0, 0, 0, /* filled in by dev_attach */
"scd", 0, { MDDT_ISA, 0, "bio" },
isa_generic_externalize, 0, 0, ISA_EXTERNALLEN,
&kdc_isa0, /* parent */
0, /* parentdata */
DC_UNCONFIGURED, /* status */
"Sony CD-ROM drive", /* properly filled later */
DC_CLS_RDISK /* class */
} };
static inline void
scd_registerdev(struct isa_device *id)
{
if(id->id_unit)
kdc_scd[id->id_unit] = kdc_scd[0];
kdc_scd[id->id_unit].kdc_unit = id->id_unit;
kdc_scd[id->id_unit].kdc_isa = id;
dev_attach(&kdc_scd[id->id_unit]);
}
int scd_attach(struct isa_device *dev)
{
int unit = dev->id_unit;
struct scd_data *cd = scd_data + unit;
char name[32];
cd->iobase = dev->id_iobase; /* Already set by probe, but ... */
kdc_scd[dev->id_unit].kdc_state = DC_IDLE;
/* name filled in probe */
kdc_scd[dev->id_unit].kdc_description = scd_data[dev->id_unit].name;
printf("scd%d: <%s>\n", dev->id_unit, scd_data[dev->id_unit].name);
init_drive(dev->id_unit);
cd->flags = SCDINIT;
cd->audio_status = CD_AS_AUDIO_INVALID;
#ifdef DEVFS
#define SCD_UID 0
#define SCD_GID 13
sprintf(name, "rscd%da",unit);
cd->ra_devfs_token = devfs_add_devsw(
"/", name, &scd_cdevsw, (unit * 8 ) + 0,
DV_CHR, SCD_UID, SCD_GID, 0600);
sprintf(name, "rscd%dc",unit);
cd->rc_devfs_token = devfs_add_devsw(
"/", name, &scd_cdevsw, (unit * 8 ) + RAW_PART,
DV_CHR, SCD_UID, SCD_GID, 0600);
sprintf(name, "scd%da",unit);
cd->a_devfs_token = devfs_add_devsw(
"/", name, &scd_bdevsw, (unit * 8 ) + 0,
DV_BLK, SCD_UID, SCD_GID, 0600);
sprintf(name, "scd%dc",unit);
cd->c_devfs_token = devfs_add_devsw(
"/", name, &scd_bdevsw, (unit * 8 ) + RAW_PART,
DV_BLK, SCD_UID, SCD_GID, 0600);
#endif
return 1;
}
static int
scdopen(dev_t dev, int flags, int fmt, struct proc *p)
{
int unit,part,phys;
int rc;
struct scd_data *cd;
unit = scd_unit(dev);
if (unit >= NSCD)
return ENXIO;
cd = scd_data + unit;
part = scd_part(dev);
phys = scd_phys(dev);
/* not initialized*/
if (!(cd->flags & SCDINIT))
return ENXIO;
/* invalidated in the meantime? mark all open part's invalid */
if (cd->openflag)
return ENXIO;
XDEBUG(1,("scd%d: DEBUG: status = 0x%x\n", unit, inb(cd->iobase+IREG_STATUS)));
if ((rc = spin_up(unit)) != 0) {
print_error(unit, rc);
return EIO;
}
if (!(cd->flags & SCDTOC)) {
int loop_count = 3;
while (loop_count-- > 0 && (rc = read_toc(dev)) != 0) {
if (rc == ERR_NOT_SPINNING) {
rc = spin_up(unit);
if (rc) {
print_error(unit, rc);\
return EIO;
}
continue;
}
printf("scd%d: TOC read error 0x%x\n", unit, rc);
return EIO;
}
}
cd->openflag = 1;
cd->flags |= SCDVALID;
kdc_scd[unit].kdc_state = DC_BUSY;
return 0;
}
static int
scdclose(dev_t dev, int flags, int fmt, struct proc *p)
{
int unit,part,phys;
struct scd_data *cd;
unit = scd_unit(dev);
if (unit >= NSCD)
return ENXIO;
cd = scd_data + unit;
part = scd_part(dev);
phys = scd_phys(dev);
if (!(cd->flags & SCDINIT) || !cd->openflag)
return ENXIO;
if (cd->audio_status != CD_AS_PLAY_IN_PROGRESS) {
(void)send_cmd(unit, CMD_SPIN_DOWN, 0);
cd->flags &= ~SCDSPINNING;
}
kdc_scd[unit].kdc_state = DC_IDLE;
/* close channel */
cd->openflag = 0;
return 0;
}
static void
scdstrategy(struct buf *bp)
{
struct scd_data *cd;
struct buf *qp;
int s;
int unit = scd_unit(bp->b_dev);
cd = scd_data + unit;
XDEBUG(2, ("scd%d: DEBUG: strategy: block=%ld, bcount=%ld\n", unit, bp->b_blkno, bp->b_bcount));
if (unit >= NSCD || bp->b_blkno < 0 || (bp->b_bcount % SCDBLKSIZE)) {
printf("scd%d: strategy failure: blkno = %ld, bcount = %ld\n",
unit, bp->b_blkno, bp->b_bcount);
bp->b_error = EINVAL;
bp->b_flags |= B_ERROR;
goto bad;
}
/* if device invalidated (e.g. media change, door open), error */
if (!(cd->flags & SCDVALID)) {
printf("scd%d: media changed\n", unit);
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;
if (!(cd->flags & SCDTOC)) {
bp->b_error = EIO;
goto bad;
}
/* adjust transfer if necessary */
if (bounds_check_with_label(bp,&cd->dlabel,1) <= 0)
goto done;
bp->b_pblkno = bp->b_blkno;
bp->b_resid = 0;
/* queue it */
qp = &cd->head;
s = splbio();
disksort(qp,bp);
splx(s);
/* now check whether we can perform processing */
scd_start(unit);
return;
bad:
bp->b_flags |= B_ERROR;
done:
bp->b_resid = bp->b_bcount;
biodone(bp);
return;
}
static void
scd_start(int unit)
{
struct scd_data *cd = scd_data + unit;
struct buf *bp, *qp = &cd->head;
struct partition *p;
register s = splbio();
if (cd->flags & SCDMBXBSY) {
splx(s);
return;
}
if ((bp = qp->b_actf) != 0) {
/* block found to process, dequeue */
qp->b_actf = bp->b_actf;
cd->flags |= SCDMBXBSY;
splx(s);
} else {
/* nothing to do */
splx(s);
return;
}
p = cd->dlabel.d_partitions + scd_part(bp->b_dev);
cd->mbx.unit = unit;
cd->mbx.port = cd->iobase;
cd->mbx.retry = 3;
cd->mbx.bp = bp;
cd->mbx.p_offset = p->p_offset;
splx(s);
scd_doread(SCD_S_BEGIN,&(cd->mbx));
return;
}
static int
scdioctl(dev_t dev, int cmd, caddr_t addr, int flags, struct proc *p)
{
struct scd_data *cd;
int unit,part;
unit = scd_unit(dev);
part = scd_part(dev);
cd = scd_data + unit;
XDEBUG(1, ("scd%d: ioctl: cmd=0x%x\n", unit, cmd));
if (!(cd->flags & SCDVALID))
return EIO;
switch (cmd) {
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[0];
return 0;
case CDIOCPLAYTRACKS:
return scd_playtracks(unit, (struct ioc_play_track *) addr);
case CDIOCPLAYBLOCKS:
return EINVAL;
case CDIOCPLAYMSF:
return scd_playmsf(unit, (struct ioc_play_msf *) addr);
case CDIOCREADSUBCHANNEL:
return scd_subchan(unit, (struct ioc_read_subchannel *) addr);
case CDIOREADTOCHEADER:
return scd_toc_header (unit, (struct ioc_toc_header *) addr);
case CDIOREADTOCENTRYS:
return scd_toc_entrys (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 scd_resume(unit);
case CDIOCPAUSE:
return scd_pause(unit);
case CDIOCSTART:
return EINVAL;
case CDIOCSTOP:
return scd_stop(unit);
case CDIOCEJECT:
return scd_eject(unit);
case CDIOCALLOW:
return 0;
case CDIOCSETDEBUG:
#ifdef SCD_DEBUG
scd_debuglevel++;
#endif
return 0;
case CDIOCCLRDEBUG:
#ifdef SCD_DEBUG
scd_debuglevel = 0;
#endif
return 0;
default:
printf("scd%d: unsupported ioctl (cmd=0x%x)\n", unit, cmd);
return ENOTTY;
}
}
static int
scdsize(dev_t dev)
{
return -1;
}
/***************************************************************
* lower level of driver starts here
**************************************************************/
static int
scd_playtracks(int unit, struct ioc_play_track *pt)
{
struct scd_data *cd = scd_data + unit;
struct ioc_play_msf msf;
int a = pt->start_track;
int z = pt->end_track;
int rc;
if (!(cd->flags & SCDTOC) && (rc = read_toc(unit)) != 0) {
if (rc == -ERR_NOT_SPINNING) {
if (spin_up(unit) != 0)
return EIO;
rc = read_toc(unit);
}
if (rc != 0) {
print_error(unit, rc);
return EIO;
}
}
XDEBUG(1, ("scd%d: playtracks from %d:%d to %d:%d\n", unit,
a, pt->start_index, z, pt->end_index));
if ( a < cd->first_track
|| a > cd->last_track
|| a > z
|| z > cd->last_track)
return EINVAL;
bcopy(cd->toc[a].start_msf, &msf.start_m, 3);
hsg2msf(msf2hsg(cd->toc[z+1].start_msf)-1, &msf.end_m);
return scd_play(unit, &msf);
}
/* The start/end msf is expected to be in bin format */
static int
scd_playmsf(int unit, struct ioc_play_msf *msfin)
{
struct ioc_play_msf msf;
msf.start_m = bin2bcd(msfin->start_m);
msf.start_s = bin2bcd(msfin->start_s);
msf.start_f = bin2bcd(msfin->start_f);
msf.end_m = bin2bcd(msfin->end_m);
msf.end_s = bin2bcd(msfin->end_s);
msf.end_f = bin2bcd(msfin->end_f);
return scd_play(unit, &msf);
}
/* The start/end msf is expected to be in bcd format */
static int
scd_play(int unit, struct ioc_play_msf *msf)
{
struct scd_data *cd = scd_data + unit;
int i, rc;
XDEBUG(1, ("scd%d: playing: %02x:%02x:%02x -> %02x:%02x:%02x\n", unit,
msf->start_m, msf->start_s, msf->start_f,
msf->end_m, msf->end_s, msf->end_f));
for (i = 0; i < 2; i++) {
rc = send_cmd(unit, CMD_PLAY_AUDIO, 7,
0x03,
msf->start_m, msf->start_s, msf->start_f,
msf->end_m, msf->end_s, msf->end_f);
if (rc == -ERR_NOT_SPINNING) {
cd->flags &= ~SCDSPINNING;
if (spin_up(unit) != 0)
return EIO;
} else if (rc < 0) {
print_error(unit, rc);
return EIO;
} else {
break;
}
}
cd->audio_status = CD_AS_PLAY_IN_PROGRESS;
bcopy((char *)msf, (char *)&cd->last_play, sizeof(struct ioc_play_msf));
return 0;
}
static int
scd_stop(int unit)
{
struct scd_data *cd = scd_data + unit;
(void)send_cmd(unit, CMD_STOP_AUDIO, 0);
cd->audio_status = CD_AS_PLAY_COMPLETED;
return 0;
}
static int
scd_pause(int unit)
{
struct scd_data *cd = scd_data + unit;
struct sony_subchannel_position_data subpos;
if (cd->audio_status != CD_AS_PLAY_IN_PROGRESS)
return EINVAL;
if (read_subcode(unit, &subpos) != 0)
return EIO;
if (send_cmd(unit, CMD_STOP_AUDIO, 0) != 0)
return EIO;
cd->last_play.start_m = subpos.abs_msf[0];
cd->last_play.start_s = subpos.abs_msf[1];
cd->last_play.start_f = subpos.abs_msf[2];
cd->audio_status = CD_AS_PLAY_PAUSED;
XDEBUG(1, ("scd%d: pause @ %02x:%02x:%02x\n", unit,
cd->last_play.start_m,
cd->last_play.start_s,
cd->last_play.start_f));
return 0;
}
static int
scd_resume(int unit)
{
if (scd_data[unit].audio_status != CD_AS_PLAY_PAUSED)
return EINVAL;
return scd_play(unit, &scd_data[unit].last_play);
}
static int
scd_eject(int unit)
{
struct scd_data *cd = scd_data + unit;
cd->audio_status = CD_AS_AUDIO_INVALID;
cd->flags &= ~(SCDSPINNING|SCDTOC);
if (send_cmd(unit, CMD_STOP_AUDIO, 0) != 0 ||
send_cmd(unit, CMD_SPIN_DOWN, 0) != 0 ||
send_cmd(unit, CMD_EJECT, 0) != 0)
{
return EIO;
}
return 0;
}
static int
scd_subchan(int unit, struct ioc_read_subchannel *sc)
{
struct scd_data *cd = scd_data + unit;
struct sony_subchannel_position_data q;
struct cd_sub_channel_info data;
XDEBUG(1, ("scd%d: subchan af=%d, df=%d\n", unit,
sc->address_format,
sc->data_format));
if (sc->address_format != CD_MSF_FORMAT)
return EINVAL;
if (sc->data_format != CD_CURRENT_POSITION)
return EINVAL;
if (read_subcode(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.track_number);
data.what.position.reladdr.msf.unused = 0;
data.what.position.reladdr.msf.minute = bcd2bin(q.rel_msf[0]);
data.what.position.reladdr.msf.second = bcd2bin(q.rel_msf[1]);
data.what.position.reladdr.msf.frame = bcd2bin(q.rel_msf[2]);
data.what.position.absaddr.msf.unused = 0;
data.what.position.absaddr.msf.minute = bcd2bin(q.abs_msf[0]);
data.what.position.absaddr.msf.second = bcd2bin(q.abs_msf[1]);
data.what.position.absaddr.msf.frame = bcd2bin(q.abs_msf[2]);
if (copyout(&data, sc->data, min(sizeof(struct cd_sub_channel_info), sc->data_len))!=0)
return EFAULT;
return 0;
}
int
scd_probe(struct isa_device *dev)
{
struct sony_drive_configuration drive_config;
int unit = dev->id_unit;
int rc;
static char namebuf[8+16+8+3];
char *s = namebuf;
int loop_count = 0;
scd_data[unit].flags = SCDPROBING;
scd_data[unit].iobase = dev->id_iobase;
bzero(&drive_config, sizeof(drive_config));
scd_registerdev(dev);
again:
/* Reset drive */
write_control(dev->id_iobase, CBIT_RESET_DRIVE);
/* Calm down */
DELAY(300000);
/* Only the ATTENTION bit may be set */
if ((inb(dev->id_iobase+IREG_STATUS) & ~1) != 0) {
XDEBUG(1, ("scd: too many bits set. probe failed.\n"));
return 0;
}
rc = send_cmd(unit, CMD_GET_DRIVE_CONFIG, 0);
if (rc != sizeof(drive_config)) {
/* Sometimes if the drive is playing audio I get */
/* the bad result 82. Fix by repeating the reset */
if (rc > 0 && loop_count++ == 0)
goto again;
return 0;
}
if (get_result(unit, rc, (u_char *)&drive_config) != 0)
return 0;
bcopy(drive_config.vendor, namebuf, 8);
s = namebuf+8;
while (*(s-1) == ' ') /* Strip trailing spaces */
s--;
*s++ = ' ';
bcopy(drive_config.product, s, 16);
s += 16;
while (*(s-1) == ' ')
s--;
*s++ = ' ';
bcopy(drive_config.revision, s, 8);
s += 8;
while (*(s-1) == ' ')
s--;
*s = 0;
scd_data[unit].name = namebuf;
if (drive_config.config & 0x10)
scd_data[unit].double_speed = 1;
else
scd_data[unit].double_speed = 0;
return 4;
}
static int
read_subcode(int unit, struct sony_subchannel_position_data *sc)
{
int rc;
rc = send_cmd(unit, CMD_GET_SUBCHANNEL_DATA, 0);
if (rc < 0 || rc < sizeof(*sc))
return EIO;
if (get_result(unit, rc, (u_char *)sc) != 0)
return EIO;
return 0;
}
/* State machine copied from mcd.c */
/* This (and the code in mcd.c) will not work with more than one drive */
/* because there is only one mbxsave below. Should fix that some day. */
/* (mbxsave & state should probably be included in the scd_data struct and */
/* the unit number used as first argument to scd_doread().) /Micke */
/* state machine to process read requests
* initialize with SCD_S_BEGIN: reset state machine
* SCD_S_WAITSTAT: wait for ready (!busy)
* SCD_S_WAITSPIN: wait for drive to spin up (if not spinning)
* SCD_S_WAITFIFO: wait for param fifo to get ready, them exec. command.
* SCD_S_WAITREAD: wait for data ready, read data
* SCD_S_WAITPARAM: wait for command result params, read them, error if bad data read.
*/
static struct scd_mbx *mbxsave;
static void
scd_doread(int state, struct scd_mbx *mbxin)
{
struct scd_mbx *mbx = (state!=SCD_S_BEGIN) ? mbxsave : mbxin;
int unit = mbx->unit;
int port = mbx->port;
struct buf *bp = mbx->bp;
struct scd_data *cd = scd_data + unit;
int reg,i;
int blknum;
caddr_t addr;
static char sdata[3]; /* Must be preserved between calls to this function */
loop:
switch (state) {
case SCD_S_BEGIN:
mbx = mbxsave = mbxin;
case SCD_S_BEGIN1:
/* get status */
mbx->count = RDELAY_WAIT;
process_attention(unit);
goto trystat;
case SCD_S_WAITSTAT:
untimeout((timeout_func_t)scd_doread,(caddr_t)SCD_S_WAITSTAT);
if (mbx->count-- <= 0) {
printf("scd%d: timeout. drive busy.\n",unit);
goto harderr;
}
trystat:
if (IS_BUSY(port)) {
timeout((timeout_func_t)scd_doread,
(caddr_t)SCD_S_WAITSTAT,hz/100); /* XXX */
return;
}
process_attention(unit);
/* reject, if audio active */
if (cd->audio_status & CD_AS_PLAY_IN_PROGRESS) {
printf("scd%d: audio is active\n",unit);
goto harderr;
}
mbx->sz = cd->blksize;
/* for first block */
mbx->nblk = (bp->b_bcount + (mbx->sz-1)) / mbx->sz;
mbx->skip = 0;
nextblock:
if (!(cd->flags & SCDVALID))
goto changed;
blknum = (bp->b_blkno / (mbx->sz/DEV_BSIZE))
+ mbx->p_offset + mbx->skip/mbx->sz;
XDEBUG(2, ("scd%d: scd_doread: read blknum=%d\n", unit, blknum));
/* build parameter block */
hsg2msf(blknum, sdata);
write_control(port, CBIT_RESULT_READY_CLEAR);
write_control(port, CBIT_RPARAM_CLEAR);
write_control(port, CBIT_DATA_READY_CLEAR);
if (FSTATUS_BIT(port, FBIT_WPARAM_READY))
goto writeparam;
mbx->count = 100;
timeout((timeout_func_t)scd_doread,
(caddr_t)SCD_S_WAITFIFO,hz/100); /* XXX */
return;
case SCD_S_WAITSPIN:
untimeout((timeout_func_t)scd_doread,(caddr_t)SCD_S_WAITSPIN);
if (mbx->count-- <= 0) {
printf("scd%d: timeout waiting for drive to spin up.\n", unit);
goto harderr;
}
if (!STATUS_BIT(port, SBIT_RESULT_READY)) {
timeout((timeout_func_t)scd_doread,
(caddr_t)SCD_S_WAITSPIN,hz/100); /* XXX */
return;
}
write_control(port, CBIT_RESULT_READY_CLEAR);
switch ((i = inb(port+IREG_RESULT)) & 0xf0) {
case 0x20:
i = inb(port+IREG_RESULT);
print_error(unit, i);
goto harderr;
case 0x00:
(void)inb(port+IREG_RESULT);
cd->flags |= SCDSPINNING;
break;
}
XDEBUG(1, ("scd%d: DEBUG: spin up complete\n", unit));
state = SCD_S_BEGIN1;
goto loop;
case SCD_S_WAITFIFO:
untimeout((timeout_func_t)scd_doread,(caddr_t)SCD_S_WAITFIFO);
if (mbx->count-- <= 0) {
printf("scd%d: timeout. write param not ready.\n",unit);
goto harderr;
}
if (!FSTATUS_BIT(port, FBIT_WPARAM_READY)) {
timeout((timeout_func_t)scd_doread,
(caddr_t)SCD_S_WAITFIFO,hz/100); /* XXX */
return;
}
XDEBUG(1, ("scd%d: mbx->count (writeparamwait) = %d(%d)\n", unit, mbx->count, 100));
writeparam:
/* The reason this test isn't done 'till now is to make sure */
/* that it is ok to send the SPIN_UP cmd below. */
if (!(cd->flags & SCDSPINNING)) {
XDEBUG(1, ("scd%d: spinning up drive ...\n", unit));
outb(port+OREG_COMMAND, CMD_SPIN_UP);
mbx->count = 300;
timeout((timeout_func_t)scd_doread,
(caddr_t)SCD_S_WAITSPIN,hz/100); /* XXX */
return;
}
reg = port + OREG_WPARAMS;
/* send the read command */
disable_intr();
outb(reg, sdata[0]);
outb(reg, sdata[1]);
outb(reg, sdata[2]);
outb(reg, 0);
outb(reg, 0);
outb(reg, 1);
outb(port+OREG_COMMAND, CMD_READ);
enable_intr();
mbx->count = RDELAY_WAITREAD;
for (i = 0; i < 50; i++) {
if (STATUS_BIT(port, SBIT_DATA_READY))
goto got_data;
DELAY(100);
}
timeout((timeout_func_t)scd_doread,
(caddr_t)SCD_S_WAITREAD,hz/100); /* XXX */
return;
case SCD_S_WAITREAD:
untimeout((timeout_func_t)scd_doread,(caddr_t)SCD_S_WAITREAD);
if (mbx->count-- <= 0) {
if (STATUS_BIT(port, SBIT_RESULT_READY))
goto got_param;
printf("scd%d: timeout while reading data\n",unit);
goto readerr;
}
if (!STATUS_BIT(port, SBIT_DATA_READY)) {
process_attention(unit);
if (!(cd->flags & SCDVALID))
goto changed;
timeout((timeout_func_t)scd_doread,
(caddr_t)SCD_S_WAITREAD,hz/100); /* XXX */
return;
}
XDEBUG(2, ("scd%d: mbx->count (after RDY_BIT) = %d(%d)\n", unit, mbx->count, RDELAY_WAITREAD));
got_data:
/* data is ready */
addr = bp->b_un.b_addr + mbx->skip;
write_control(port, CBIT_DATA_READY_CLEAR);
insb(port+IREG_DATA, addr, mbx->sz);
mbx->count = 100;
for (i = 0; i < 20; i++) {
if (STATUS_BIT(port, SBIT_RESULT_READY))
goto waitfor_param;
DELAY(100);
}
goto waitfor_param;
case SCD_S_WAITPARAM:
untimeout((timeout_func_t)scd_doread,(caddr_t)SCD_S_WAITPARAM);
if (mbx->count-- <= 0) {
printf("scd%d: timeout waiting for params\n",unit);
goto readerr;
}
waitfor_param:
if (!STATUS_BIT(port, SBIT_RESULT_READY)) {
timeout((timeout_func_t)scd_doread,
(caddr_t)SCD_S_WAITPARAM,hz/100); /* XXX */
return;
}
#if SCD_DEBUG
if (mbx->count < 100 && scd_debuglevel > 0)
printf("scd%d: mbx->count (paramwait) = %d(%d)\n", unit, mbx->count, 100);
#endif
got_param:
write_control(port, CBIT_RESULT_READY_CLEAR);
switch ((i = inb(port+IREG_RESULT)) & 0xf0) {
case 0x50:
switch (i) {
case ERR_FATAL_READ_ERROR1:
case ERR_FATAL_READ_ERROR2:
printf("scd%d: unrecoverable read error 0x%x\n", unit, i);
goto harderr;
}
break;
case 0x20:
i = inb(port+IREG_RESULT);
switch (i) {
case ERR_NOT_SPINNING:
XDEBUG(1, ("scd%d: read error: drive not spinning\n", unit));
if (mbx->retry-- > 0) {
state = SCD_S_BEGIN1;
cd->flags &= ~SCDSPINNING;
goto loop;
}
goto harderr;
default:
print_error(unit, i);
goto readerr;
}
case 0x00:
i = inb(port+IREG_RESULT);
break;
}
if (--mbx->nblk > 0) {
mbx->skip += mbx->sz;
goto nextblock;
}
/* return buffer */
bp->b_resid = 0;
biodone(bp);
cd->flags &= ~SCDMBXBSY;
scd_start(mbx->unit);
return;
}
readerr:
if (mbx->retry-- > 0) {
printf("scd%d: retrying ...\n",unit);
state = SCD_S_BEGIN1;
goto loop;
}
harderr:
/* invalidate the buffer */
bp->b_error = EIO;
bp->b_flags |= B_ERROR;
bp->b_resid = bp->b_bcount;
biodone(bp);
cd->flags &= ~SCDMBXBSY;
scd_start(mbx->unit);
return;
changed:
printf("scd%d: media changed\n", unit);
goto harderr;
}
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 void
process_attention(unsigned unit)
{
unsigned port = scd_data[unit].iobase;
unsigned char code;
int count = 0;
while (IS_ATTENTION(port) && count++ < 30) {
write_control(port, CBIT_ATTENTION_CLEAR);
code = inb(port+IREG_RESULT);
#if SCD_DEBUG
if (scd_debuglevel > 0) {
if (count == 1)
printf("scd%d: DEBUG: ATTENTIONS = 0x%x", unit, code);
else
printf(",0x%x", code);
}
#endif
switch (code) {
case ATTEN_SPIN_DOWN:
scd_data[unit].flags &= ~SCDSPINNING;
break;
case ATTEN_SPIN_UP_DONE:
scd_data[unit].flags |= SCDSPINNING;
break;
case ATTEN_AUDIO_DONE:
scd_data[unit].audio_status = CD_AS_PLAY_COMPLETED;
break;
case ATTEN_DRIVE_LOADED:
scd_data[unit].flags &= ~(SCDTOC|SCDSPINNING|SCDVALID);
scd_data[unit].audio_status = CD_AS_AUDIO_INVALID;
break;
case ATTEN_EJECT_PUSHED:
scd_data[unit].flags &= ~SCDVALID;
break;
}
DELAY(100);
}
#if SCD_DEBUG
if (scd_debuglevel > 0 && count > 0)
printf("\n");
#endif
}
/* Returns 0 OR sony error code */
static int
spin_up(unsigned unit)
{
unsigned char res_reg[12];
unsigned int res_size;
int rc;
int loop_count = 0;
again:
rc = send_cmd(unit, CMD_SPIN_UP, NULL, 0, res_reg, &res_size);
if (rc != 0) {
XDEBUG(2, ("scd%d: CMD_SPIN_UP error 0x%x\n", unit, rc));
return rc;
}
if (!(scd_data[unit].flags & SCDTOC)) {
rc = send_cmd(unit, CMD_READ_TOC, 0);
if (rc == ERR_NOT_SPINNING) {
if (loop_count++ < 3)
goto again;
return rc;
}
if (rc != 0)
return rc;
}
scd_data[unit].flags |= SCDSPINNING;
return 0;
}
static struct sony_tracklist *
get_tl(struct sony_toc *toc, int size)
{
struct sony_tracklist *tl = &toc->tracks[0];
if (tl->track != 0xb0)
return tl;
(char *)tl += 9;
if (tl->track != 0xb1)
return tl;
(char *)tl += 9;
if (tl->track != 0xb2)
return tl;
(char *)tl += 9;
if (tl->track != 0xb3)
return tl;
(char *)tl += 9;
if (tl->track != 0xb4)
return tl;
(char *)tl += 9;
if (tl->track != 0xc0)
return tl;
(char *)tl += 9;
return tl;
}
static int
read_toc(dev_t dev)
{
unsigned unit;
struct scd_data *cd;
unsigned part = 0; /* For now ... */
struct sony_toc toc;
struct sony_tracklist *tl;
int rc, i, j;
u_long first, last;
unit = scd_unit(dev);
cd = scd_data + unit;
rc = send_cmd(unit, CMD_GET_TOC, 1, part+1);
if (rc < 0)
return rc;
if (rc > sizeof(toc)) {
printf("scd%d: program error: toc too large (%d)\n", unit, rc);
return EIO;
}
if (get_result(unit, rc, (u_char *)&toc) != 0)
return EIO;
XDEBUG(1, ("scd%d: toc read. len = %d, sizeof(toc) = %d\n", unit, rc, sizeof(toc)));
tl = get_tl(&toc, rc);
first = msf2hsg(tl->start_msf);
last = msf2hsg(toc.lead_out_start_msf);
cd->blksize = SCDBLKSIZE;
cd->disksize = last*cd->blksize/DEV_BSIZE;
XDEBUG(1, ("scd%d: firstsector = %ld, lastsector = %ld", unit,
first, last));
cd->first_track = bcd2bin(toc.first_track);
cd->last_track = bcd2bin(toc.last_track);
if (cd->last_track > (MAX_TRACKS-2))
cd->last_track = MAX_TRACKS-2;
for (j = 0, i = cd->first_track; i <= cd->last_track; i++, j++) {
cd->toc[i].adr = tl[j].adr;
cd->toc[i].ctl = tl[j].ctl; /* for xcdplayer */
bcopy(tl[j].start_msf, cd->toc[i].start_msf, 3);
#ifdef SCD_DEBUG
if (scd_debuglevel > 0) {
if ((j % 3) == 0)
printf("\nscd%d: tracks ", unit);
printf("[%03d: %2d %2d %2d] ", i,
bcd2bin(cd->toc[i].start_msf[0]),
bcd2bin(cd->toc[i].start_msf[1]),
bcd2bin(cd->toc[i].start_msf[2]));
}
#endif
}
bcopy(toc.lead_out_start_msf, cd->toc[cd->last_track+1].start_msf, 3);
#ifdef SCD_DEBUG
if (scd_debuglevel > 0) {
i = cd->last_track+1;
printf("[END: %2d %2d %2d]\n",
bcd2bin(cd->toc[i].start_msf[0]),
bcd2bin(cd->toc[i].start_msf[1]),
bcd2bin(cd->toc[i].start_msf[2]));
}
#endif
bzero(&cd->dlabel,sizeof(struct disklabel));
/* filled with spaces first */
strncpy(cd->dlabel.d_typename," ",
sizeof(cd->dlabel.d_typename));
strncpy(cd->dlabel.d_typename, cd->name,
min(strlen(cd->name), sizeof(cd->dlabel.d_typename) - 1));
strncpy(cd->dlabel.d_packname,"unknown ",
sizeof(cd->dlabel.d_packname));
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 |= SCDTOC;
return 0;
}
static inline void
write_control(unsigned port, unsigned data)
{
outb(port + OREG_CONTROL, data);
}
static void
init_drive(unsigned unit)
{
int rc;
rc = send_cmd(unit, CMD_SET_DRIVE_PARAM, 2,
0x05, 0x03 | ((scd_data[unit].double_speed) ? 0x04: 0));
if (rc != 0)
printf("scd%d: Unable to set parameters. Errcode = 0x%x\n", unit, rc);
}
/* Returns 0 or errno */
static int
get_result(u_int unit, int result_len, u_char *result)
{
unsigned int port = scd_data[unit].iobase;
unsigned int res_reg = port + IREG_RESULT;
int loop_index = 2; /* send_cmd() reads two bytes ... */
XDEBUG(1, ("scd%d: DEBUG: get_result: bytes=%d\n", unit, result_len));
while (result_len-- > 0) {
if (loop_index++ >= 10) {
loop_index = 1;
if (waitfor_status_bits(unit, SBIT_RESULT_READY, 0))
return EIO;
write_control(port, CBIT_RESULT_READY_CLEAR);
}
if (result)
*result++ = inb(res_reg);
else
(void)inb(res_reg);
}
return 0;
}
/* Returns -0x100 for timeout, -(drive error code) OR number of result bytes */
static int
send_cmd(u_int unit, u_char cmd, u_int nargs, ...)
{
va_list ap;
u_int port = scd_data[unit].iobase;
u_int reg;
u_char c;
int rc;
int i;
if (waitfor_status_bits(unit, 0, SBIT_BUSY)) {
printf("scd%d: drive busy\n", unit);
return -0x100;
}
XDEBUG(1,("scd%d: DEBUG: send_cmd: cmd=0x%x nargs=%d", unit, cmd, nargs));
write_control(port, CBIT_RESULT_READY_CLEAR);
write_control(port, CBIT_RPARAM_CLEAR);
for (i = 0; i < 100; i++)
if (FSTATUS_BIT(port, FBIT_WPARAM_READY))
break;
if (!FSTATUS_BIT(port, FBIT_WPARAM_READY)) {
XDEBUG(1, ("\nscd%d: wparam timeout\n", unit));
return -EIO;
}
va_start(ap, nargs);
reg = port + OREG_WPARAMS;
for (i = 0; i < nargs; i++) {
c = (u_char)va_arg(ap, int);
outb(reg, c);
XDEBUG(1, (",{0x%x}", c));
}
va_end(ap);
XDEBUG(1, ("\n"));
outb(port+OREG_COMMAND, cmd);
rc = waitfor_status_bits(unit, SBIT_RESULT_READY, SBIT_BUSY);
if (rc)
return -0x100;
reg = port + IREG_RESULT;
write_control(port, CBIT_RESULT_READY_CLEAR);
switch ((rc = inb(reg)) & 0xf0) {
case 0x20:
rc = inb(reg);
/* FALL TROUGH */
case 0x50:
XDEBUG(1, ("scd%d: DEBUG: send_cmd: drive_error=0x%x\n", unit, rc));
return -rc;
case 0x00:
default:
rc = inb(reg);
XDEBUG(1, ("scd%d: DEBUG: send_cmd: result_len=%d\n", unit, rc));
return rc;
}
}
static void
print_error(int unit, int errcode)
{
switch (errcode) {
case -ERR_CD_NOT_LOADED:
printf("scd%d: door is open\n", unit);
break;
case -ERR_NO_CD_INSIDE:
printf("scd%d: no cd inside\n", unit);
break;
default:
if (errcode == -0x100 || errcode > 0)
printf("scd%d: device timeout\n", unit);
else
printf("scd%d: unexpected error 0x%x\n", unit, -errcode);
break;
}
}
/* Returns 0 or errno value */
static int
waitfor_status_bits(int unit, int bits_set, int bits_clear)
{
u_int port = scd_data[unit].iobase;
u_int flags = scd_data[unit].flags;
u_int reg = port + IREG_STATUS;
u_int max_loop;
u_char c = 0;
if (flags & SCDPROBING) {
max_loop = 0;
while (max_loop++ < 1000) {
c = inb(reg);
if (c == 0xff)
return EIO;
if (c & SBIT_ATTENTION) {
process_attention(unit);
continue;
}
if ((c & bits_set) == bits_set &&
(c & bits_clear) == 0)
{
break;
}
DELAY(10000);
}
} else {
max_loop = 100;
while (max_loop-- > 0) {
c = inb(reg);
if (c & SBIT_ATTENTION) {
process_attention(unit);
continue;
}
if ((c & bits_set) == bits_set &&
(c & bits_clear) == 0)
{
break;
}
tsleep(waitfor_status_bits, PZERO - 1, "waitfor", hz/10);
}
}
if ((c & bits_set) == bits_set &&
(c & bits_clear) == 0)
{
return 0;
}
#ifdef SCD_DEBUG
if (scd_debuglevel > 0)
printf("scd%d: DEBUG: waitfor: TIMEOUT (0x%x,(0x%x,0x%x))\n", unit, c, bits_set, bits_clear);
else
#endif
printf("scd%d: timeout.\n", unit);
return EIO;
}
/* these two routines for xcdplayer - "borrowed" from mcd.c */
static int
scd_toc_header (int unit, struct ioc_toc_header* th)
{
struct scd_data *cd = scd_data + unit;
int rc;
if (!(cd->flags & SCDTOC) && (rc = read_toc(unit)) != 0) {
print_error(unit, rc);
return EIO;
}
th->starting_track = cd->first_track;
th->ending_track = cd->last_track;
th->len = 0; /* not used */
return 0;
}
static int
scd_toc_entrys (int unit, struct ioc_read_toc_entry *te)
{
struct scd_data *cd = scd_data + unit;
struct cd_toc_entry toc_entry;
int rc, i, len = te->data_len;
if (!(cd->flags & SCDTOC) && (rc = read_toc(unit)) != 0) {
print_error(unit, rc);
return EIO;
}
/* find the toc to copy*/
i = te->starting_track;
if (i == SCD_LASTPLUS1)
i = cd->last_track + 1;
/* verify starting track */
if (i < cd->first_track || i > cd->last_track+1)
return EINVAL;
/* valid length ? */
if (len < sizeof(struct cd_toc_entry)
|| (len % sizeof(struct cd_toc_entry)) != 0)
return EINVAL;
/* copy the toc data */
toc_entry.control = cd->toc[i].ctl;
toc_entry.addr_type = te->address_format;
toc_entry.track = i;
if (te->address_format == CD_MSF_FORMAT) {
toc_entry.addr.msf.unused = 0;
toc_entry.addr.msf.minute = bcd2bin(cd->toc[i].start_msf[0]);
toc_entry.addr.msf.second = bcd2bin(cd->toc[i].start_msf[1]);
toc_entry.addr.msf.frame = bcd2bin(cd->toc[i].start_msf[2]);
}
/* copy the data back */
if (copyout(&toc_entry, te->data, sizeof(struct cd_toc_entry)) != 0)
return EFAULT;
return 0;
}
static scd_devsw_installed = 0;
static void scd_drvinit(void *unused)
{
dev_t dev;
if( ! scd_devsw_installed ) {
dev = makedev(CDEV_MAJOR, 0);
cdevsw_add(&dev,&scd_cdevsw, NULL);
dev = makedev(BDEV_MAJOR, 0);
bdevsw_add(&dev,&scd_bdevsw, NULL);
scd_devsw_installed = 1;
}
}
SYSINIT(scddev,SI_SUB_DRIVERS,SI_ORDER_MIDDLE+CDEV_MAJOR,scd_drvinit,NULL)
#endif /* NSCD > 0 */
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