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dockapps/ascd/libworkman/plat_ultrix.c

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/*
* $Id: plat_ultrix.c,v 1.6 1999/03/07 08:36:41 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
*
*
* ULTRIX 4.2 drive control routines.
*/
#if defined(ultrix) || defined(__ultrix)
static char plat_ultrix_id[] = "$Id: plat_ultrix.c,v 1.6 1999/03/07 08:36:41 dirk Exp $";
#include <errno.h>
#include <stdio.h>
#include <sys/types.h>
#include <fcntl.h>
#include <sys/param.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <ustat.h>
#include <string.h>
#include <sys/rzdisk.h>
#include <sys/cdrom.h>
#include "include/wm_config.h"
#include "include/wm_struct.h"
#define WM_MSG_CLASS WM_MSG_CLASS_PLATFORM
/*
* This structure will be filled with the TOC header and all entries.
* Ultrix doesn't seem to allow getting single TOC entries.
* - Chris Ross (cross@eng.umd.edu)
*/
struct cd_toc_header_and_entries {
struct cd_toc_header cdth;
struct cd_toc_entry cdte[CDROM_MAX_TRACK+1];
};
void *malloc();
char *strchr();
int min_volume = 128;
int max_volume = 255;
extern char *cd_device;
/*
* find_cdrom
*
* Determine the name of the CD-ROM device.
*
* Read through the boot records (via a call to uerf) and find the SCSI
* address of the CD-ROM. If the "CDROM" environment variable is set,
* use that instead.
*/
void
find_cdrom()
{
char *data, *fgetline();
FILE *uerf;
int fds[2];
int pid;
if ((cd_device = getenv("CDROM")) != NULL)
return;
pipe(fds);
if ((pid = fork()) == 0) {
close(fds[0]);
dup2(fds[1], 1);
execl("/etc/uerf", "uerf", "-R", "-r", "300", NULL);
execl("/usr/sbin/uerf", "uerf", "-R", "-r", "300", NULL);
_exit(1);
} else if (pid < 0) {
perror("fork");
exit(1);
}
close(fds[1]);
uerf = fdopen(fds[0], "r");
while (data = fgetline(uerf))
if (strstr(data, "RRD42")) {
char *device;
cd_device = (char *)malloc(sizeof("/dev/rrz##c"));
strcpy(cd_device, "/dev/r");
device = strstr(data, "rz");
device[(int)(strchr(device, ' ') - device)] = '\0';
strcat(cd_device, device);
strcat(cd_device, "c");
break;
}
fclose(uerf);
if (cd_device == NULL) {
fprintf(stderr,
"No cdrom (RRD42) is installed on this system\n");
exit(1);
}
kill(pid, 15);
(void)wait((int *)NULL);
}
/*
* Initialize the drive. A no-op for the generic driver.
*/
int
gen_init(d)
struct wm_drive *d;
{
return (0);
}
/*
* Get the number of tracks on the CD.
*/
int
gen_get_trackcount(d, tracks)
struct wm_drive *d;
int *tracks;
{
struct cd_toc_header hdr;
if (ioctl(d->fd, CDROM_TOC_HEADER, &hdr))
return (-1);
*tracks = hdr.th_ending_track;
return (0);
}
/*
* Get the start time and mode (data or audio) of a track.
*
* XXX - this should get cached, but that means keeping track of ejects.
*/
int
gen_get_trackinfo(d, track, data, startframe)
struct wm_drive *d;
int track, *data, *startframe;
{
struct cd_toc toc;
struct cd_toc_header hdr;
struct cd_toc_header_and_entries toc_buffer;
if (ioctl(d->fd, CDROM_TOC_HEADER, &hdr))
return (-1);
bzero((char *)&toc_buffer, sizeof(toc_buffer));
toc.toc_address_format = CDROM_MSF_FORMAT;
toc.toc_starting_track = 0;
toc.toc_alloc_length = (u_short)(((hdr.th_data_len1 << 8) +
hdr.th_data_len0) & 0xfff) + 2;
toc.toc_buffer = (caddr_t)&toc_buffer;
if (ioctl(d->fd, CDROM_TOC_ENTRYS, &toc))
return (-1);
if (track == 0)
track = hdr.th_ending_track + 1;
*data = (toc_buffer.cdte[track-1].te_control & CDROM_DATA_TRACK) ? 1:0;
*startframe = toc_buffer.cdte[track - 1].te_absaddr.msf.m_units*60*75 +
toc_buffer.cdte[track - 1].te_absaddr.msf.s_units * 75 +
toc_buffer.cdte[track - 1].te_absaddr.msf.f_units;
return (0);
}
/*
* Get the number of frames on the CD.
*/
int
gen_get_cdlen(d, frames)
struct wm_drive *d;
int *frames;
{
int tmp;
return (gen_get_trackinfo(d, 0, &tmp, frames));
}
/*
* 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(d, oldmode, mode, pos, track, index)
struct wm_drive *d;
enum wm_cd_modes oldmode, *mode;
int *pos, *track, *index;
{
struct cd_sub_channel sc;
struct cd_subc_channel_data scd;
/* If we can't get status, the CD is ejected, so default to that. */
*mode = WM_CDM_EJECTED;
sc.sch_address_format = CDROM_MSF_FORMAT;
sc.sch_data_format = CDROM_CURRENT_POSITION;
sc.sch_track_number = 0;
sc.sch_alloc_length = sizeof(scd);
sc.sch_buffer = (caddr_t)&scd;
/* Is the device open? */
if (d->fd < 0)
{
switch (wmcd_open(d)) {
case -1: /* error */
return (-1);
case 1: /* retry */
return (0);
}
}
if (ioctl(d->fd, CDROM_READ_SUBCHANNEL, &sc))
return (0); /* ejected */
switch (scd.scd_header.sh_audio_status) {
case AS_PLAY_IN_PROGRESS:
*mode = WM_CDM_PLAYING;
dopos:
*pos = scd.scd_position_data.scp_absaddr.msf.m_units * 60 * 75 +
scd.scd_position_data.scp_absaddr.msf.s_units * 75 +
scd.scd_position_data.scp_absaddr.msf.f_units;
*track = scd.scd_position_data.scp_track_number;
*index = scd.scd_position_data.scp_index_number;
break;
case AS_PLAY_PAUSED:
if (oldmode == WM_CDM_PLAYING || oldmode == WM_CDM_PAUSED)
{
*mode = WM_CDM_PAUSED;
goto dopos;
}
else
*mode = WM_CDM_STOPPED;
break;
case AS_PLAY_COMPLETED:
*mode = WM_CDM_TRACK_DONE; /* waiting for next track. */
break;
case AS_NO_STATUS:
*mode = WM_CDM_STOPPED;
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.
*
* On Sun and DEC CD-ROM drives, the amount of sound coming out the jack
* increases much faster toward the top end of the volume scale than it
* does at the bottom. To make up for this, we make the volume scale look
* sort of logarithmic (actually an upside-down inverse square curve) so
* that the volume value passed to the drive changes less and less as you
* approach the maximum slider setting. The actual formula looks like
*
* (max^2 - (max - vol)^2) * (max_volume - min_volume)
* v = --------------------------------------------------- + min_volume
* max^2
*
* If your system's volume settings aren't broken in this way, something
* like the following should work:
*
* return ((vol * (max_volume - min_volume)) / max + min_volume);
*/
scale_volume(vol, max)
int vol, max;
{
return ((max * max - (max - vol) * (max - vol)) *
(max_volume - min_volume) / (max * max) + min_volume);
}
/*
* Set the volume level for the left and right channels. Their values
* range from 0 to 100.
*/
int
gen_set_volume(d, left, right)
struct wm_drive *d;
int left, right;
{
struct cd_playback pb;
struct cd_playback_status ps;
struct cd_playback_control pc;
left = scale_volume(left, 100);
right = scale_volume(right, 100);
bzero((char *)&pb, sizeof(pb));
bzero((char *)&ps, sizeof(ps));
bzero((char *)&pc, sizeof(pc));
pb.pb_alloc_length = sizeof(ps);
pb.pb_buffer = (caddr_t)&ps;
if (ioctl(d->fd, CDROM_PLAYBACK_STATUS, &pb))
return (-1);
pc.pc_chan0_select = ps.ps_chan0_select;
pc.pc_chan0_volume = (left < CDROM_MIN_VOLUME) ?
CDROM_MIN_VOLUME : (left > CDROM_MAX_VOLUME) ?
CDROM_MAX_VOLUME : left;
pc.pc_chan1_select = ps.ps_chan1_select;
pc.pc_chan1_volume = (right < CDROM_MIN_VOLUME) ?
CDROM_MIN_VOLUME : (right > CDROM_MAX_VOLUME) ?
CDROM_MAX_VOLUME : right;
pb.pb_alloc_length = sizeof(pc);
pb.pb_buffer = (caddr_t)&pc;
if (ioctl(d->fd, CDROM_PLAYBACK_CONTROL, &pb))
return (-1);
return (0);
}
/*
* Pause the CD.
*/
int
gen_pause(d)
struct wm_drive *d;
{
return (ioctl(d->fd, CDROM_PAUSE_PLAY));
}
/*
* Resume playing the CD (assuming it was paused.)
*/
int
gen_resume(d)
struct wm_drive *d;
{
return (ioctl(d->fd, CDROM_RESUME_PLAY));
}
/*
* Stop the CD.
*/
int
gen_stop(d)
struct wm_drive *d;
{
return (ioctl(d->fd, SCSI_STOP_UNIT));
}
/*
* Play the CD from one position to another (both in frames.)
*/
int
gen_play(d, start, end)
struct wm_drive *d;
int start, end;
{
struct cd_play_audio_msf msf;
msf.msf_starting_M_unit = start / (60*75);
msf.msf_starting_S_unit = (start % (60*75)) / 75;
msf.msf_starting_F_unit = start % 75;
msf.msf_ending_M_unit = end / (60*75);
msf.msf_ending_S_unit = (end % (60*75)) / 75;
msf.msf_ending_F_unit = end % 75;
if (ioctl(d->fd, SCSI_START_UNIT))
return (-1);
if (ioctl(d->fd, CDROM_PLAY_MSF, &msf))
return (-2);
return (0);
}
/*
* Eject the current CD, if there is one.
*/
int
gen_eject(struct wm_drive *d)
{
/* On some systems, we can check to see if the CD is mounted. */
struct stat stbuf;
struct ustat ust;
if (fstat(d->fd, &stbuf) != 0)
return (-2);
/* Is this a mounted filesystem? */
if (ustat(stbuf.st_rdev, &ust) == 0)
return (-3);
return (ioctl(d->fd, CDROM_EJECT_CADDY));
} /* gen_eject() */
/*----------------------------------------*
* Close the CD tray
*
* Please edit and send changes to
* milliByte@DeathsDoor.com
*----------------------------------------*/
int gen_closetray(struct wm_drive *d)
{
#ifdef CAN_CLOSE
if(!close(d->fd))
{
d->fd=-1;
return(wmcd_reopen(d));
} else {
return(-1);
}
#else
/* Always succeed if the drive can't close */
return(0);
#endif /* CAN_CLOSE */
} /* gen_closetray() */
/*
* unscale_volume(cd_vol, max)
*
* Given a value between min_volume and max_volume, return the volume slider
* value needed to achieve that value.
*
* Rather than perform floating-point calculations to reverse the above
* formula, we simply do a binary search of scale_volume()'s return values.
*/
static int
unscale_volume(cd_vol, max)
int cd_vol, max;
{
int vol = 0, top = max, bot = 0, scaled;
while (bot <= top)
{
vol = (top + bot) / 2;
scaled = scale_volume(vol, max);
if (cd_vol == scaled)
break;
if (cd_vol < scaled)
top = vol - 1;
else
bot = vol + 1;
}
if (vol < 0)
vol = 0;
else if (vol > max)
vol = max;
return (vol);
}
/*
* 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(d, left, right)
struct wm_drive *d;
int *left, *right;
{
struct cd_playback pb;
struct cd_playback_status ps;
bzero((char *)&pb, sizeof(pb));
bzero((char *)&ps, sizeof(ps));
pb.pb_alloc_length = sizeof(ps);
pb.pb_buffer = (caddr_t)&ps;
if (d->fd >= 0)
{
if (ioctl(d->fd, CDROM_PLAYBACK_STATUS, &pb))
*left = *right = -1;
else
{
*left = unscale_volume(ps.ps_chan0_volume, 100);
*right = unscale_volume(ps.ps_chan1_volume, 100);
}
}
else
*left = *right = -1;
return (0);
}
/*
* Send an arbitrary SCSI command to a device.
*/
int
wm_scsi(d, cdb, cdblen, retbuf, retbuflen, getreply)
struct wm_drive *d;
unsigned char *cdb;
int cdblen;
void *retbuf;
int retbuflen;
int getreply;
{
/* ULTRIX doesn't have a SCSI passthrough interface, does it? */
return (-1);
}
/*
* fgetline()
*
* Simulate fgets, but joining continued lines in the output of uerf.
*/
#define BUF_SIZE 85 /* Max length of a (real) line */
char *
fgetline(fp)
FILE *fp;
{
static char *retval = NULL;
static char holdbuf[BUF_SIZE + 1];
char tmp[BUF_SIZE + 1];
char *stmp;
if (!retval) {
retval = malloc(BUF_SIZE * 3); /* 3 lines can be joined */
if (!retval)
return(NULL);
else
*retval = '\0';
}
if (*holdbuf) {
strcpy(retval, holdbuf);
retval[strlen(retval)-1] = '\0';
memset(holdbuf, 0, BUF_SIZE+1);
}
while (fgets(tmp, BUF_SIZE, fp)) {
stmp = tmp + strspn(tmp, " \t");
if (*stmp == '_') { /* Continuation line */
retval[strlen(retval)-1] = '\0'; /* Trim off C/R */
strcat(retval, stmp+1);
} else {
if (*retval) {
strcpy(holdbuf, tmp);
holdbuf[strlen(holdbuf)-1] = -1;
return retval;
} else { /* First line read, keep reading */
strcat(retval, stmp);
retval[strlen(retval)-1] = '\0';
}
}
}
return NULL;
}
/*
* Open the CD device and figure out what kind of drive is attached.
*/
int
wmcd_open(d)
struct wm_drive *d;
{
int fd;
static int warned = 0;
if (d->fd >= 0) /* Device already open? */
return (0);
if (cd_device == NULL)
find_cdrom();
d->fd = open(cd_device, 0);
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++;
}
}
else if (errno != EINTR)
{
perror(cd_device);
exit(1);
}
/* No CD in drive. */
return (1);
}
if (warned)
{
warned = 0;
fprintf(stderr, "Thank you.\n");
}
/* Now fill in the relevant parts of the wm_drive structure. */
fd = d->fd;
*d = *(find_drive_struct("", "", ""));
d->fd = fd;
(d->init)(d);
return (0);
} /* 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
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