File: plat_openbsd.c

package info (click to toggle)
workman 1.3b-1
  • links: PTS
  • area: main
  • in suites: slink
  • size: 1,172 kB
  • ctags: 896
  • sloc: ansic: 11,084; makefile: 123; sh: 28
file content (503 lines) | stat: -rw-r--r-- 10,176 bytes parent folder | download
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
/*
 * plat_openbsd.c
 *
 * This file is part of WorkMan, the civilized CD player program
 * (c) 1991-1997 by Steven Grimm (original author)
 * (c) by Dirk F"orsterling (current 'author' = maintainer)
 * The maintainer can be contacted by his e-mail address:
 * milliByte@DeathsDoor.com
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program 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 General Public License for more details.
 *        
 * OpenBSD-specific drive control routines. (Based on plat_freebsd.c)
 *
 * Michael Shalayeff, 7/24/96
 * Todd Pfaff, 3/20/94
 *
 */

#if defined(__OpenBSD__)

static char plat_openbsd[] = "$Id: plat_openbsd.c,v 1.4 1997/11/19 10:48:28 dirk Exp $";

#include <errno.h>
#include <stdio.h>
#include <sys/types.h>
#include <sys/param.h>
#include <sys/mount.h>
#include <fcntl.h>
#include <sys/param.h>
#include <sys/stat.h>

/* this is for glibc 2.x which defines the ust structure in ustat.h not stat.h */
#ifdef __GLIBC__
#include <sys/ustat.h>
#endif

#include <sys/time.h>
#include <string.h>
#include <sys/ioctl.h>
#include <sys/cdio.h>
#include <sys/scsiio.h>
#include <scsi/scsi_all.h>
#include <scsi/scsi_cd.h>

#include "struct.h"
#include "config.h"
#include "proto.h"


void *malloc();

int	min_volume = 10;
int	max_volume = 255;

extern char	*cd_device;


/*
 * 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 ioc_toc_header	hdr;

	if (ioctl(d->fd, CDIOREADTOCHEADER, &hdr) == -1)
		return (-1);

	*tracks = hdr.ending_track - hdr.starting_track + 1;

	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 ioc_read_toc_entry	toc;
	struct cd_toc_entry		toc_buffer;

	bzero((char *)&toc_buffer, sizeof(toc_buffer));
	toc.address_format = CD_MSF_FORMAT;
	toc.starting_track = track;
	toc.data_len = sizeof(toc_buffer);
	toc.data = &toc_buffer;

	if (ioctl(d->fd, CDIOREADTOCENTRYS, &toc))
		return (-1);

	*data = ((toc_buffer.control & 0x4) != 0);

	*startframe = toc_buffer.addr.msf.minute*60*75 +
		toc_buffer.addr.msf.second * 75 +
		toc_buffer.addr.msf.frame;

	return (0);
}

/*
 * Get the number of frames on the CD.
 */
int
gen_get_cdlen(d, frames)
	struct wm_drive	*d;
	int		*frames;
{
	int		tmp;
	struct ioc_toc_header		hdr;
	int status;

#define LEADOUT 0xaa			/* see scsi.c.  what a hack! */
	return gen_get_trackinfo(d, LEADOUT, &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 cd_modes	oldmode, *mode;
	int		*pos, *track, *index;
{
	struct ioc_read_subchannel	sc;
	struct cd_sub_channel_info	scd;

	/* If we can't get status, the CD is ejected, so default to that. */
	*mode = EJECTED;

	sc.address_format	= CD_MSF_FORMAT;
	sc.data_format		= CD_CURRENT_POSITION;
	sc.track		= 0;
	sc.data_len		= sizeof(scd);
	sc.data			= (struct cd_sub_channel_info *)&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, CDIOCREADSUBCHANNEL, &sc)) {
	    /* we need to release the device so the kernel will notice
	       reloaded media */
	    (void) close(d->fd);
	    d->fd = -1;
		return (0);	/* ejected */
	}

	switch (scd.header.audio_status) {
	case CD_AS_PLAY_IN_PROGRESS:
		*mode = PLAYING;
dopos:
		*pos = scd.what.position.absaddr.msf.minute * 60 * 75 +
			scd.what.position.absaddr.msf.second * 75 +
			scd.what.position.absaddr.msf.frame;
		*track = scd.what.position.track_number;
		*index = scd.what.position.index_number;
		break;

	case CD_AS_PLAY_PAUSED:
		if (oldmode == PLAYING || oldmode == PAUSED)
		{
			*mode = PAUSED;
			goto dopos;
		}
		else
			*mode = STOPPED;
		break;

	case CD_AS_PLAY_COMPLETED:
		*mode = TRACK_DONE; /* waiting for next track. */
		break;

	case CD_AS_NO_STATUS:
	case 0:
		*mode = 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);
 */
static int
scale_volume(vol, max)
	int	vol, max;
{
    return ((vol * (max_volume - min_volume)) / 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 ioc_vol vol;

	if (left < 0)	/* don't laugh, I saw this happen once! */
	    left = 0;
	if (right < 0)
	    right = 0;
	left = scale_volume(left, 100);
	right = scale_volume(right, 100);

	bzero((char *)&vol, sizeof(vol));

	vol.vol[LEFT_PORT] = left;
	vol.vol[RIGHT_PORT] = right;

	if (ioctl(d->fd, CDIOCSETVOL, &vol))
		return (-1);

	return (0);
}

/*
 * Pause the CD.
 */
int
gen_pause(d)
	struct wm_drive	*d;
{
	return (ioctl(d->fd, CDIOCPAUSE));
}

/*
 * Resume playing the CD (assuming it was paused.)
 */
int
gen_resume(d)
	struct wm_drive	*d;
{
	return (ioctl(d->fd, CDIOCRESUME));
}

/*
 * Stop the CD.
 */
int
gen_stop(d)
	struct wm_drive *d;
{
	return (ioctl(d->fd, CDIOCSTOP));
}

/*
 * 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 ioc_play_msf	msf;

	msf.start_m	= start / (60*75);
	msf.start_s	= (start % (60*75)) / 75;
	msf.start_f	= start % 75;
	msf.end_m	= end / (60*75);
	msf.end_s	= (end % (60*75)) / 75;
	msf.end_f	= end % 75;

	if (ioctl(d->fd, CDIOCSTART))
		return (-1);

	if (ioctl(d->fd, CDIOCPLAYMSF, &msf))
		return (-2);

	return (0);
}

/*
 * Eject the current CD, if there is one.
 */
int
gen_eject(d)
	struct wm_drive	*d;
{
	/* On some systems, we can check to see if the CD is mounted. */
	struct stat	stbuf;
	struct statfs	buf;
	int rval;

	if (fstat(d->fd, &stbuf) != 0)
		return (-2);

	/* Is this a mounted filesystem? */
	if (fstatfs(stbuf.st_rdev, &buf) == 0)
		return (-3);

	rval = ioctl(d->fd, CDIOCALLOW);
	if (rval == 0)
	    rval = ioctl(d->fd, CDIOCEJECT);
	if (rval == 0)
	    rval = ioctl(d->fd, CDIOCPREVENT);
	if (rval == 0)
	    rval = close(d->fd);
	if (rval == 0)
	    d->fd = -1;
	return rval;
}

/*
 * 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 ioc_vol vol;

	if (d->fd >= 0)
	{
		bzero((char *)&vol, sizeof(vol));

		if (ioctl(d->fd, CDIOCGETVOL, &vol))
			*left = *right = -1;
		else
		{
			*left = unscale_volume(vol.vol[LEFT_PORT], 100);
			*right = unscale_volume(vol.vol[RIGHT_PORT], 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;
{
	return (-1);
}


/*
 * 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;
	char vendor[9], model[17], rev[5];

	if (d->fd >= 0)		/* Device already open? */
		return (0);

	if (cd_device == NULL)
		cd_device = DEFAULT_CD_DEVICE;

	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++;
			}
		}

		/* 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;

	vendor[0] = model[0] = rev[0] = '\0';

	*d = *(find_drive_struct(vendor, model, rev));

	(d->init)(d);

	d->fd = fd;

	return (0);
}

void
keep_cd_open( void ) { }

#endif