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dockapps/ascd/libworkman/plat_linux.c

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/*
* $Id: plat_linux.c,v 1.8 1999/06/17 06:48:03 dirk Exp $
*
* This file is part of WorkMan, the civilized CD player library
* (c) 1991-1997 by Steven Grimm (original author)
* (c) by Dirk Försterling (current 'author' = maintainer)
* The maintainer can be contacted by his e-mail address:
* milliByte@DeathsDoor.com
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the Free
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*
* Linux-specific drive control routines. Very similar to the Sun module.
*/
#ifdef linux
/* Id for ident command */
static char plat_linux_id[] = "$Id: plat_linux.c,v 1.8 1999/06/17 06:48:03 dirk Exp $";
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <fcntl.h>
#include <unistd.h>
#include <malloc.h>
#include <string.h>
#include <sys/types.h>
#include <sys/param.h>
#include <sys/socket.h>
#include <sys/stat.h>
#include <sys/wait.h>
#include "include/wm_config.h"
#if defined(BSD_MOUNTTEST)
#include <mntent.h>
#else
/*
* this is for glibc 2.x which defines ust structure in
* ustat.h not stat.h
*/
#ifdef __GLIBC__
#include <sys/ustat.h>
#endif
#endif
#include <sys/time.h>
#include <sys/ioctl.h>
#include <linux/cdrom.h>
#include "include/wm_cdda.h"
#include "include/wm_struct.h"
#include "include/wm_platform.h"
#include "include/wm_cdrom.h"
#include "include/wm_scsi.h"
#include "include/wm_helpers.h"
#ifdef OSS_SUPPORT
#include <linux/soundcard.h>
#define CD_CHANNEL SOUND_MIXER_CD
#endif
#define max(a,b) ((a) > (b) ? (a) : (b))
#define WM_MSG_CLASS WM_MSG_CLASS_PLATFORM
#ifdef LINUX_SCSI_PASSTHROUGH
/* this is from <scsi/scsi_ioctl.h> */
# define SCSI_IOCTL_SEND_COMMAND 1
#endif
int min_volume = 0;
int max_volume = 255;
#ifdef OSS_SUPPORT
int mixer;
char mixer_dev_name[20] = "/dev/mixer";
#endif
extern char *cd_device, *cddaslave_path;
int cdda_slave = -1;
/*
* Wait for an acknowledgement from the CDDA slave.
*/
static int
get_ack(int fd)
{
#if defined(BUILD_CDDA) && defined(WMCDDA_DONE) /* { */
struct cdda_block blk;
do
if (read(fd, &blk, sizeof(blk)) <= 0)
return (0);
while (blk.status != WMCDDA_ACK);
#endif /* } */
return (1);
} /* get_ack() */
/*--------------------------------------------------------*
* Initialize the drive. A no-op for the generic driver.
*--------------------------------------------------------*/
int
gen_init( struct wm_drive *d )
{
#ifdef OSS_SUPPORT
/*
* Open and use the mixer device to set volume
*/
if( ( mixer = open( mixer_dev_name, O_RDWR, 0 ) ) == -1 )
{
perror( mixer_dev_name );
exit( -1 );
}
#endif
return (0);
} /* gen_init() */
/*
* Try to initialize the CDDA slave. Returns 0 on error.
*/
int
cdda_init( struct wm_drive *d )
{
#if defined(BUILD_CDDA) && defined(WMCDDA_DONE) /* { */
int slavefds[2];
if (cdda_slave > -1)
return (1);
fprintf( stderr, "slave okay\n" );
if (socketpair(AF_UNIX, SOCK_STREAM, 0, slavefds))
{
perror("socketpair");
return (0);
}
fprintf( stderr, "going to fork\n" );
switch (fork()) {
case 0:
close(slavefds[0]);
dup2(slavefds[1], 1);
dup2(slavefds[1], 0);
close(slavefds[1]);
close(d->fd);
/* Try the default path first. */
execl(cddaslave_path, cddaslave_path, cd_device, NULL);
/* Search $PATH if that didn't work. */
execlp("cddaslave", "cddaslave", cd_device, NULL);
perror(cddaslave_path);
exit(1);
case -1:
close(slavefds[0]);
close(slavefds[1]);
perror("fork");
return (0);
}
close(slavefds[1]);
cdda_slave = slavefds[0];
if (!get_ack(cdda_slave))
{
fprintf( stderr, "get_ack failed\n" );
cdda_slave = -1;
/* codec_start(); */
return (0);
}
return (1);
#else /* BUILD_CDDA } { */
/*
* If we're not building CDDA support, don't even bother trying.
*/
return (0);
#endif
} /* cdda_init() */
/*
* Turn off the CDDA slave.
*/
void
cdda_kill( struct wm_drive *d )
{
if (cdda_slave > -1)
{
write(cdda_slave, "Q", 1);
get_ack(cdda_slave);
wait(NULL);
cdda_slave = -1;
/* codec_start(); */
}
} /* cdda_kill() */
/*-------------------------------------*
* Get the number of tracks on the CD.
*-------------------------------------*/
int
gen_get_trackcount(struct wm_drive *d, int *tracks)
{
struct cdrom_tochdr hdr;
if (ioctl(d->fd, CDROMREADTOCHDR, &hdr))
return (-1);
*tracks = hdr.cdth_trk1;
return (0);
}
/*---------------------------------------------------------*
* Get the start time and mode (data or audio) of a track.
*---------------------------------------------------------*/
int
gen_get_trackinfo(struct wm_drive *d, int track, int *data, int *startframe)
{
struct cdrom_tocentry entry;
entry.cdte_track = track;
entry.cdte_format = CDROM_MSF;
if (ioctl(d->fd, CDROMREADTOCENTRY, &entry))
return (-1);
*startframe = entry.cdte_addr.msf.minute * 60 * 75 +
entry.cdte_addr.msf.second * 75 +
entry.cdte_addr.msf.frame;
*data = entry.cdte_ctrl & CDROM_DATA_TRACK ? 1 : 0;
return (0);
}
/*-------------------------------------*
* Get the number of frames on the CD.
*-------------------------------------*/
int
gen_get_cdlen(struct wm_drive *d, int *frames)
{
int tmp;
return (gen_get_trackinfo(d, CDROM_LEADOUT, &tmp, frames));
}
/* Alarm signal handler.
static void do_nothing(int x) { x++; }
*/
/*--------------------------------------------------------------------------*
* Get the current status of the drive: the current play mode, the absolute
* position from start of disc (in frames), and the current track and index
* numbers if the CD is playing or paused.
*--------------------------------------------------------------------------*/
int
gen_get_drive_status( struct wm_drive *d, enum wm_cd_modes oldmode,
enum wm_cd_modes *mode, int *pos, int *track, int *index )
{
struct cdrom_subchnl sc;
#ifdef SBPCD_HACK
static int prevpos = 0;
#endif
/* If we can't get status, the CD is ejected, so default to that. */
*mode = WM_CDM_EJECTED;
/* Is the device open? */
if (d->fd < 0)
{
switch (wmcd_open(d))
{
case -1: /* error */
return (-1);
case 1: /* retry */
return (0);
}
}
sc.cdsc_format = CDROM_MSF;
if (ioctl(d->fd, CDROMSUBCHNL, &sc))
return (0);
switch (sc.cdsc_audiostatus) {
case CDROM_AUDIO_PLAY:
*mode = WM_CDM_PLAYING;
*track = sc.cdsc_trk;
*index = sc.cdsc_ind;
*pos = sc.cdsc_absaddr.msf.minute * 60 * 75 +
sc.cdsc_absaddr.msf.second * 75 +
sc.cdsc_absaddr.msf.frame;
#ifdef SBPCD_HACK
if( *pos < prevpos )
{
if( (prevpos - *pos) < 75 )
{
*mode = WM_CDM_TRACK_DONE;
}
}
prevpos = *pos;
#endif
break;
case CDROM_AUDIO_PAUSED:
case CDROM_AUDIO_NO_STATUS:
case CDROM_AUDIO_INVALID: /**/
if (oldmode == WM_CDM_PLAYING || oldmode == WM_CDM_PAUSED)
{
*mode = WM_CDM_PAUSED;
*track = sc.cdsc_trk;
*index = sc.cdsc_ind;
*pos = sc.cdsc_absaddr.msf.minute * 60 * 75 +
sc.cdsc_absaddr.msf.second * 75 +
sc.cdsc_absaddr.msf.frame;
}
else
*mode = WM_CDM_STOPPED;
break;
case CDROM_AUDIO_COMPLETED:
*mode = WM_CDM_TRACK_DONE; /* waiting for next track. */
break;
default:
*mode = WM_CDM_UNKNOWN;
break;
}
return (0);
}
/*------------------------------------------------------------------------*
* scale_volume(vol, max)
*
* Return a volume value suitable for passing to the CD-ROM drive. "vol"
* is a volume slider setting; "max" is the slider's maximum value.
* This is not used if sound card support is enabled.
*
*------------------------------------------------------------------------*/
#ifndef OSS_SUPPORT
static int
scale_volume( int vol, int max )
{
#ifdef CURVED_VOLUME
return ((max * max - (max - vol) * (max - vol)) *
(max_volume - min_volume) / (max * max) + min_volume);
#else
return ((vol * (max_volume - min_volume)) / max + min_volume);
#endif
} /* scale_volume() */
#endif
/*---------------------------------------------------------------------*
* Set the volume level for the left and right channels. Their values
* range from 0 to 100.
*---------------------------------------------------------------------*/
int
gen_set_volume( struct wm_drive *d, int left, int right )
{
#ifndef OSS_SUPPORT
struct cdrom_volctrl v;
#endif
int vol;
#ifdef OSS_SUPPORT
left = left < 0 ? 0 : left > 100 ? 100 : left;
right = right < 0 ? : right > 100 ? 100 : right;
vol = ( 0x007f & left ) | ( 0x7f00 & ( right << 8 ) );
if( ioctl( mixer, MIXER_WRITE( CD_CHANNEL ), &vol ) == -1 )
{
perror( "MIXER_WRITE" );
return ( -1 );
}
return ( 0 );
#else
/* Adjust the volume to make up for the CD-ROM drive's weirdness. */
left = scale_volume(left, 100);
right = scale_volume(right, 100);
v.channel0 = v.channel2 = left < 0 ? 0 : left > 255 ? 255 : left;
v.channel1 = v.channel3 = right < 0 ? 0 : right > 255 ? 255 : right;
return (ioctl(d->fd, CDROMVOLCTRL, &v));
# endif
}
/*---------------*
* Pause the CD.
*---------------*/
int
gen_pause(d)
struct wm_drive *d;
{
return (ioctl(d->fd, CDROMPAUSE));
}
/*-------------------------------------------------*
* Resume playing the CD (assuming it was paused.)
*-------------------------------------------------*/
int
gen_resume(struct wm_drive *d)
{
return (ioctl(d->fd, CDROMRESUME));
}
/*--------------*
* Stop the CD.
*--------------*/
int
gen_stop(struct wm_drive *d)
{
return (ioctl(d->fd, CDROMSTOP));
}
/*------------------------------------------------------------*
* Play the CD from one position to another (both in frames.)
*------------------------------------------------------------*/
int
gen_play(struct wm_drive *d, int start, int end)
{
struct cdrom_msf msf;
msf.cdmsf_min0 = start / (60*75);
msf.cdmsf_sec0 = (start % (60*75)) / 75;
msf.cdmsf_frame0 = start % 75;
msf.cdmsf_min1 = end / (60*75);
msf.cdmsf_sec1 = (end % (60*75)) / 75;
msf.cdmsf_frame1 = end % 75;
#ifndef FAST_IDE
if (ioctl(d->fd, CDROMSTART))
return (-1);
#endif
if (ioctl(d->fd, CDROMPLAYMSF, &msf))
return (-2);
return (0);
}
/*----------------------------------------*
* Eject the current CD, if there is one.
*----------------------------------------*/
int
gen_eject(struct wm_drive *d)
{
struct stat stbuf;
#if !defined(BSD_MOUNTTEST)
struct ustat ust;
#else
struct mntent *mnt;
FILE *fp;
#endif
if (fstat(d->fd, &stbuf) != 0)
return (-2);
/* Is this a mounted filesystem? */
#if !defined(BSD_MOUNTTEST)
if (ustat(stbuf.st_rdev, &ust) == 0)
return (-3);
#else
/*
* This is the same test as in the WorkBone interface.
* I should eliminate it there, because there is no need
* for it in the UI
*/
/* check if drive is mounted (from Mark Buckaway's cdplayer code) */
/* Changed it again (look at XPLAYCD from ???? */
/* It's better to check the device name rather than one device is */
/* mounted as iso9660. That prevents "no playing" if you have more*/
/* than one CD-ROM, and one of them is mounted, but it's not the */
/* audio CD -dirk */
if ((fp = setmntent (MOUNTED, "r")) == NULL)
{
fprintf (stderr, "Could not open %s: %s\n", MOUNTED, strerror (errno));
return(-3);
}
while ((mnt = getmntent (fp)) != NULL)
{
if (strcmp (mnt->mnt_fsname, cd_device) == 0)
{
fputs ("CDROM already mounted (according to mtab). Operation aborted.\n", stderr);
endmntent (fp);
return(-3);
}
}
endmntent (fp);
#endif /* BSD_MOUNTTEST */
if (ioctl(d->fd, CDROMEJECT))
return (-1);
/*------------------
* Things in "foobar_one" are left over from 1.4b3
* I put them here for further observation. In 1.4b3, however,
* that workaround didn't help at least for /dev/sbpcd
* (The tray closed just after ejecting because re-opening the
* device causes the tray to close)
*------------------*/
#ifdef foobar_one
extern int intermittent_dev
/*
* Some drives (drivers?) won't recognize a new CD if we leave the
* device open.
*/
if (intermittent_dev)
{
close(d->fd);
d->fd = -1;
}
#endif
return (0);
} /* gen_eject() */
/*----------------------------------------*
* Close the CD tray
*----------------------------------------*/
int gen_closetray(struct wm_drive *d)
{
#ifdef CAN_CLOSE
#ifdef CDROMCLOSETRAY
wm_lib_message(WM_MSG_LEVEL_DEBUG|WM_MSG_CLASS, "CDROMCLOSETRAY closing tray...\n");
if (ioctl(d->fd, CDROMCLOSETRAY))
return (-1);
#else
wm_lib_message(WM_MSG_LEVEL_DEBUG|WM_MSG_CLASS, "wmcd_reopen() closing tray...\n");
if(!close(d->fd))
{
d->fd=-1;
return(wmcd_reopen(d));
} else {
return(-1);
}
#endif /* CDROMCLOSETRAY */
#else /* CAN_CLOSE */
/* Always succeed if the drive can't close. */
return(0);
#endif /* CAN_CLOSE */
} /* gen_closetray() */
/*--------------------------------*
* Keep the CD open all the time.
* disabled, analogous to 1.4b3
*--------------------------------*
void
keep_cd_open( void )
{
int fd;
struct flock fl;
extern end;
for (fd = 0; fd < 256; fd++)
close(fd);
if (fork())
exit(0);
if ((fd = open("/tmp/cd.lock", O_RDWR | O_CREAT, 0666)) < 0)
exit(0);
fl.l_type = F_WRLCK;
fl.l_whence = 0;
fl.l_start = 0;
fl.l_len = 0;
if (fcntl(fd, F_SETLK, &fl) < 0)
exit(0);
if (open(cd_device, 0) >= 0)
{
brk(&end);
pause();
}
exit(0);
}
*/
/*---------------------------------------------------------------------*
* Read the initial volume from the drive, if available. Each channel
* ranges from 0 to 100, with -1 indicating data not available.
*---------------------------------------------------------------------*/
int
gen_get_volume( struct wm_drive *d, int *left, int *right )
{
#if defined(BUILD_CDDA) && defined(WMCDDA_DONE) /* { */
struct cdda_block blk;
if (cdda_slave > -1)
{
write(cdda_slave, "G", 1);
get_ack(cdda_slave);
read(cdda_slave, &blk, sizeof(blk));
*left = *right = (blk.volume * 100 + 254) / 255;
if (blk.balance < 110)
*right = (((blk.volume * blk.balance + 127) / 128) *
100 + 254) / 255;
else if (blk.balance > 146)
*left = (((blk.volume * (255 - blk.balance) +
127) / 128) * 100 + 254) / 255;
return (0);
}
#else /* } */
#ifdef OSS_SUPPORT
int vol;
if( ioctl( mixer, MIXER_READ( CD_CHANNEL ), &vol ) == -1 )
{
perror( "MIXER_READ" );
*left = *right = -1;
}
*right = 0x007f & ( vol >> 8 );
*left = 0x007f & vol;
#else
/* Suns, HPs, Linux, NEWS can't read the volume; oh well */
*left = *right = -1;
#endif
#endif
return (0);
}
#ifdef BUILD_CDDA /* { */
/*
* Tell the CDDA slave to set the play direction.
*/
void
gen_set_direction( int newdir )
{
unsigned char buf[2];
if (cdda_slave > -1)
{
buf[0] = 'd';
buf[1] = newdir;
write(cdda_slave, buf, 2);
get_ack(cdda_slave);
}
}
/*
* Tell the CDDA slave to set the play speed.
*/
void
gen_set_speed( int speed )
{
unsigned char buf[2];
if (cdda_slave > -1)
{
buf[0] = 's';
buf[1] = speed;
write(cdda_slave, buf, 2);
get_ack(cdda_slave);
}
}
/*
* Tell the CDDA slave to set the loudness level.
*/
void
gen_set_loudness( int loud )
{
unsigned char buf[2];
if (cdda_slave > -1)
{
buf[0] = 'L';
buf[1] = loud;
write(cdda_slave, buf, 2);
get_ack(cdda_slave);
}
}
/*
* Tell the CDDA slave to start (or stop) saving to a file.
*/
void
gen_save( char *filename )
{
int len;
if (filename == NULL || filename[0] == '\0')
len = 0;
else
len = strlen(filename);
write(cdda_slave, "F", 1);
write(cdda_slave, &len, sizeof(len));
if (len)
write(cdda_slave, filename, len);
get_ack(cdda_slave);
}
#endif /* BUILD_CDDA } */
/*---------------------------------------------*
* Send an arbitrary SCSI command to a device.
*---------------------------------------------*/
int
wm_scsi( struct wm_drive *d, unsigned char *cdb, int cdblen,
void *retbuf, int retbuflen, int getreply )
{
#ifdef LINUX_SCSI_PASSTHROUGH
char *cmd;
int cmdsize;
cmdsize = 2 * sizeof(int);
if (retbuf)
{
if (getreply) cmdsize += max(cdblen, retbuflen);
else cmdsize += (cdblen + retbuflen);
}
else cmdsize += cdblen;
cmd = malloc(cmdsize);
if (cmd == NULL)
return (-1);
((int*)cmd)[0] = cdblen + ((retbuf && !getreply) ? retbuflen : 0);
((int*)cmd)[1] = ((retbuf && getreply) ? retbuflen : 0);
memcpy(cmd + 2*sizeof(int), cdb, cdblen);
if (retbuf && !getreply)
memcpy(cmd + 2*sizeof(int) + cdblen, retbuf, retbuflen);
if (ioctl(d->fd, SCSI_IOCTL_SEND_COMMAND, cmd))
{
wm_lib_message(WM_MSG_LEVEL_DEBUG|WM_MSG_CLASS, "%s: ioctl() failure\n", __FILE__);
wm_lib_message(WM_MSG_LEVEL_DEBUG|WM_MSG_CLASS, "command buffer is:\n");
wm_lib_message(WM_MSG_LEVEL_DEBUG|WM_MSG_CLASS, "%02x %02x %02x %02x %02x %02x\n",
cmd[0], cmd[1], cmd[2], cmd[3], cmd[4], cmd[5]);
free(cmd);
return (-1);
}
if (retbuf && getreply)
memcpy(retbuf, cmd + 2*sizeof(int), retbuflen);
free(cmd);
return 0;
#else /* Linux SCSI passthrough*/
return (-1);
#endif
}
/*---------------------------------------------------------------------------*
* Open the CD device and figure out what kind of drive is attached.
*---------------------------------------------------------------------------*/
int
wmcd_open( struct wm_drive *d )
{
int fd;
static int warned = 0;
int retval = 0;
char vendor[32], model[32], rev[32];
if (cd_device == NULL)
cd_device = DEFAULT_CD_DEVICE;
if (d->fd >= 0) /* Device already open? */
{
wm_lib_message(WM_MSG_LEVEL_DEBUG|WM_MSG_CLASS, "wmcd_open(): [device is open (fd=%d)]\n", d->fd);
return (0);
}
d->fd = open(cd_device, O_RDONLY | O_NONBLOCK);
if (d->fd < 0)
{
if (errno == EACCES)
{
if (!warned)
{
fprintf(stderr,
"As root, please run\n\nchmod 666 %s\n\n%s\n", cd_device,
"to give yourself permission to access the CD-ROM device.");
warned++;
}
}
/* Hack proposed by Carey Evans, introduced by Debian maintainer :
* treat EIO like ENXIO since some Linux drives do never return ENXIO
*/
else if ((errno != ENXIO) && (errno != EIO) && (errno != ENOMEDIUM))
{
perror(cd_device);
exit(1);
}
/* No CD in drive. */
retval = 1;
}
if (warned)
{
warned = 0;
fprintf(stderr, "Thank you.\n");
}
/* Now fill in the relevant parts of the wm_drive structure. */
fd = d->fd;
#ifdef LINUX_SCSI_PASSTHROUGH
/* Can we figure out the drive type? */
wm_scsi_get_drive_type(d, vendor, model, rev);
#endif
*d = *(find_drive_struct(vendor, model, rev));
wm_drive_settype(vendor, model, rev);
d->fd = fd;
(d->init)(d);
return retval;
} /* wmcd_open() */
/*
* Re-Open the device if it is open.
*/
int
wmcd_reopen( struct wm_drive *d )
{
int status;
do {
wm_lib_message(WM_MSG_LEVEL_DEBUG|WM_MSG_CLASS, "wmcd_reopen ");
if (d->fd >= 0) /* Device really open? */
{
wm_lib_message(WM_MSG_LEVEL_DEBUG|WM_MSG_CLASS, "closes the device and ");
status = close( d->fd ); /* close it! */
/* we know, that the file is closed, do we? */
d->fd = -1;
}
wm_susleep( 1000 );
wm_lib_message(WM_MSG_LEVEL_DEBUG|WM_MSG_CLASS, "calls wmcd_open()\n");
status = wmcd_open( d ); /* open it as usual */
wm_susleep( 1000 );
} while ( status != 0 );
return status;
} /* wmcd_reopen() */
#endif /* linux */
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