2 * spkr.c -- device driver for console speaker
4 * v1.4 by Eric S. Raymond (esr@snark.thyrsus.com) Aug 1993
5 * modified for FreeBSD by Andrew A. Chernov <ache@astral.msk.su>
6 * modified for PC98 by Kakefuda
10 __FBSDID("$FreeBSD$");
12 #include <sys/param.h>
13 #include <sys/systm.h>
15 #include <sys/kernel.h>
16 #include <sys/module.h>
19 #include <sys/ctype.h>
20 #include <sys/malloc.h>
21 #include <isa/isavar.h>
22 #include <machine/clock.h>
23 #include <machine/ppireg.h>
24 #include <machine/timerreg.h>
25 #include <dev/speaker/speaker.h>
27 static d_open_t spkropen;
28 static d_close_t spkrclose;
29 static d_write_t spkrwrite;
30 static d_ioctl_t spkrioctl;
32 static struct cdevsw spkr_cdevsw = {
33 .d_version = D_VERSION,
34 .d_flags = D_NEEDGIANT,
42 static MALLOC_DEFINE(M_SPKR, "spkr", "Speaker buffer");
44 /**************** MACHINE DEPENDENT PART STARTS HERE *************************
46 * This section defines a function tone() which causes a tone of given
47 * frequency and duration from the ISA console speaker.
48 * Another function endtone() is defined to force sound off, and there is
49 * also a rest() entry point to do pauses.
51 * Audible sound is generated using the Programmable Interval Timer (PIT) and
52 * Programmable Peripheral Interface (PPI) attached to the ISA speaker. The
53 * PPI controls whether sound is passed through at all; the PIT's channel 2 is
54 * used to generate clicks (a square wave) of whatever frequency is desired.
58 #define SPKR_DESC "PC98 speaker"
60 #define SPKR_DESC "PC speaker"
64 static char endtone, endrest;
66 static void tone(unsigned int thz, unsigned int centisecs);
67 static void rest(int centisecs);
68 static void playinit(void);
69 static void playtone(int pitch, int value, int sustain);
70 static void playstring(char *cp, size_t slen);
72 /* emit tone of frequency thz for given number of centisecs */
75 unsigned int thz, centisecs;
83 divisor = timer_freq / thz;
86 (void) printf("tone: thz=%d centisecs=%d\n", thz, centisecs);
89 /* set timer to generate clicks at given frequency in Hertz */
92 if (timer_spkr_acquire()) {
93 /* enter list of waiting procs ??? */
99 spkr_set_pitch(divisor);
102 /* turn the speaker on */
106 * Set timeout to endtone function, then give up the timeslice.
107 * This is so other processes can execute while the tone is being
110 timo = centisecs * hz / 100;
112 tsleep(&endtone, SPKRPRI | PCATCH, "spkrtn", timo);
115 timer_spkr_release();
119 /* rest for given number of centisecs */
127 * Set timeout to endrest function, then give up the timeslice.
128 * This is so other processes can execute while the rest is being
132 (void) printf("rest: %d\n", centisecs);
134 timo = centisecs * hz / 100;
136 tsleep(&endrest, SPKRPRI | PCATCH, "spkrrs", timo);
139 /**************** PLAY STRING INTERPRETER BEGINS HERE **********************
141 * Play string interpretation is modelled on IBM BASIC 2.0's PLAY statement;
142 * M[LNS] are missing; the ~ synonym and the _ slur mark and the octave-
143 * tracking facility are added.
144 * Requires tone(), rest(), and endtone(). String play is not interruptible
145 * except possibly at physical block boundaries.
152 #define dtoi(c) ((c) - '0')
154 static int octave; /* currently selected octave */
155 static int whole; /* whole-note time at current tempo, in ticks */
156 static int value; /* whole divisor for note time, quarter note = 1 */
157 static int fill; /* controls spacing of notes */
158 static bool octtrack; /* octave-tracking on? */
159 static bool octprefix; /* override current octave-tracking state? */
162 * Magic number avoidance...
164 #define SECS_PER_MIN 60 /* seconds per minute */
165 #define WHOLE_NOTE 4 /* quarter notes per whole note */
166 #define MIN_VALUE 64 /* the most we can divide a note by */
167 #define DFLT_VALUE 4 /* default value (quarter-note) */
168 #define FILLTIME 8 /* for articulation, break note in parts */
169 #define STACCATO 6 /* 6/8 = 3/4 of note is filled */
170 #define NORMAL 7 /* 7/8ths of note interval is filled */
171 #define LEGATO 8 /* all of note interval is filled */
172 #define DFLT_OCTAVE 4 /* default octave */
173 #define MIN_TEMPO 32 /* minimum tempo */
174 #define DFLT_TEMPO 120 /* default tempo */
175 #define MAX_TEMPO 255 /* max tempo */
176 #define NUM_MULT 3 /* numerator of dot multiplier */
177 #define DENOM_MULT 2 /* denominator of dot multiplier */
179 /* letter to half-tone: A B C D E F G */
180 static int notetab[8] = {9, 11, 0, 2, 4, 5, 7};
183 * This is the American Standard A440 Equal-Tempered scale with frequencies
184 * rounded to nearest integer. Thank Goddess for the good ol' CRC Handbook...
185 * our octave 0 is standard octave 2.
187 #define OCTAVE_NOTES 12 /* semitones per octave */
188 static int pitchtab[] =
190 /* C C# D D# E F F# G G# A A# B*/
191 /* 0 */ 65, 69, 73, 78, 82, 87, 93, 98, 103, 110, 117, 123,
192 /* 1 */ 131, 139, 147, 156, 165, 175, 185, 196, 208, 220, 233, 247,
193 /* 2 */ 262, 277, 294, 311, 330, 349, 370, 392, 415, 440, 466, 494,
194 /* 3 */ 523, 554, 587, 622, 659, 698, 740, 784, 831, 880, 932, 988,
195 /* 4 */ 1047, 1109, 1175, 1245, 1319, 1397, 1480, 1568, 1661, 1760, 1865, 1975,
196 /* 5 */ 2093, 2217, 2349, 2489, 2637, 2794, 2960, 3136, 3322, 3520, 3729, 3951,
197 /* 6 */ 4186, 4435, 4698, 4978, 5274, 5588, 5920, 6272, 6644, 7040, 7459, 7902,
203 octave = DFLT_OCTAVE;
204 whole = (100 * SECS_PER_MIN * WHOLE_NOTE) / DFLT_TEMPO;
208 octprefix = TRUE; /* act as though there was an initial O(n) */
211 /* play tone of proper duration for current rhythm signature */
213 playtone(pitch, value, sustain)
214 int pitch, value, sustain;
216 register int sound, silence, snum = 1, sdenom = 1;
218 /* this weirdness avoids floating-point arithmetic */
219 for (; sustain; sustain--)
221 /* See the BUGS section in the man page for discussion */
223 sdenom *= DENOM_MULT;
226 if (value == 0 || sdenom == 0)
230 rest(whole * snum / (value * sdenom));
233 sound = (whole * snum) / (value * sdenom)
234 - (whole * (FILLTIME - fill)) / (value * FILLTIME);
235 silence = whole * (FILLTIME-fill) * snum / (FILLTIME * value * sdenom);
238 (void) printf("playtone: pitch %d for %d ticks, rest for %d ticks\n",
239 pitch, sound, silence);
242 tone(pitchtab[pitch], sound);
248 /* interpret and play an item from a notation string */
254 int pitch, oldfill, lastpitch = OCTAVE_NOTES * DFLT_OCTAVE;
256 #define GETNUM(cp, v) for(v=0; isdigit(cp[1]) && slen > 0; ) \
257 {v = v * 10 + (*++cp - '0'); slen--;}
260 int sustain, timeval, tempo;
261 register char c = toupper(*cp);
264 (void) printf("playstring: %c (%x)\n", c, c);
269 case 'A': case 'B': case 'C': case 'D': case 'E': case 'F': case 'G':
272 pitch = notetab[c - 'A'] + octave * OCTAVE_NOTES;
274 /* this may be followed by an accidental sign */
275 if (cp[1] == '#' || cp[1] == '+')
281 else if (cp[1] == '-')
289 * If octave-tracking mode is on, and there has been no octave-
290 * setting prefix, find the version of the current letter note
291 * closest to the last regardless of octave.
293 if (octtrack && !octprefix)
295 if (abs(pitch-lastpitch) > abs(pitch+OCTAVE_NOTES-lastpitch))
298 pitch += OCTAVE_NOTES;
301 if (abs(pitch-lastpitch) > abs((pitch-OCTAVE_NOTES)-lastpitch))
304 pitch -= OCTAVE_NOTES;
310 /* ...which may in turn be followed by an override time value */
312 if (timeval <= 0 || timeval > MIN_VALUE)
315 /* ...and/or sustain dots */
316 for (sustain = 0; cp[1] == '.'; cp++)
322 /* ...and/or a slur mark */
331 /* time to emit the actual tone */
332 playtone(pitch, timeval, sustain);
338 if (cp[1] == 'N' || cp[1] == 'n')
340 octprefix = octtrack = FALSE;
344 else if (cp[1] == 'L' || cp[1] == 'l')
353 if (octave >= sizeof(pitchtab) / sizeof(pitchtab[0]) / OCTAVE_NOTES)
354 octave = DFLT_OCTAVE;
360 if (octave < sizeof(pitchtab) / sizeof(pitchtab[0]) / OCTAVE_NOTES - 1)
373 for (sustain = 0; cp[1] == '.'; cp++)
385 playtone(pitch - 1, value, sustain);
391 if (value <= 0 || value > MIN_VALUE)
397 /* this may be followed by an override time value */
399 if (timeval <= 0 || timeval > MIN_VALUE)
401 for (sustain = 0; cp[1] == '.'; cp++)
406 playtone(-1, timeval, sustain);
411 if (tempo < MIN_TEMPO || tempo > MAX_TEMPO)
413 whole = (100 * SECS_PER_MIN * WHOLE_NOTE) / tempo;
417 if (cp[1] == 'N' || cp[1] == 'n')
423 else if (cp[1] == 'L' || cp[1] == 'l')
429 else if (cp[1] == 'S' || cp[1] == 's')
440 /******************* UNIX DRIVER HOOKS BEGIN HERE **************************
442 * This section implements driver hooks to run playstring() and the tone(),
443 * endtone(), and rest() functions defined above.
446 static int spkr_active = FALSE; /* exclusion flag */
447 static char *spkr_inbuf; /* incoming buf */
450 spkropen(dev, flags, fmt, td)
457 (void) printf("spkropen: entering with dev = %s\n", devtoname(dev));
462 else if (spkr_active)
467 (void) printf("spkropen: about to perform play initialization\n");
470 spkr_inbuf = malloc(DEV_BSIZE, M_SPKR, M_WAITOK);
477 spkrwrite(dev, uio, ioflag)
483 printf("spkrwrite: entering with dev = %s, count = %d\n",
484 devtoname(dev), uio->uio_resid);
489 else if (uio->uio_resid > (DEV_BSIZE - 1)) /* prevent system crashes */
499 error = uiomove(cp, n, uio);
509 spkrclose(dev, flags, fmt, td)
516 (void) printf("spkrclose: entering with dev = %s\n", devtoname(dev));
525 free(spkr_inbuf, M_SPKR);
532 spkrioctl(dev, cmd, cmdarg, flags, td)
540 (void) printf("spkrioctl: entering with dev = %s, cmd = %lx\n",
541 devtoname(dev), cmd);
546 else if (cmd == SPKRTONE)
548 tone_t *tp = (tone_t *)cmdarg;
550 if (tp->frequency == 0)
553 tone(tp->frequency, tp->duration);
556 else if (cmd == SPKRTUNE)
558 tone_t *tp = (tone_t *)(*(caddr_t *)cmdarg);
563 error = copyin(tp, &ttp, sizeof(tone_t));
566 if (ttp.duration == 0)
568 if (ttp.frequency == 0)
571 tone(ttp.frequency, ttp.duration);
579 * Install placeholder to claim the resources owned by the
582 static struct isa_pnp_id speaker_ids[] = {
584 { 0x0008d041 /* PNP0800 */, SPKR_DESC },
589 static struct cdev *speaker_dev;
592 speaker_probe(device_t dev)
596 error = ISA_PNP_PROBE(device_get_parent(dev), dev, speaker_ids);
606 /* Not configured by hints. */
607 if (strncmp(device_get_name(dev), "speaker", 9))
610 device_set_desc(dev, SPKR_DESC);
616 speaker_attach(device_t dev)
620 device_printf(dev, "Already attached!\n");
624 speaker_dev = make_dev(&spkr_cdevsw, 0, UID_ROOT, GID_WHEEL, 0600,
630 speaker_detach(device_t dev)
632 destroy_dev(speaker_dev);
636 static device_method_t speaker_methods[] = {
637 /* Device interface */
638 DEVMETHOD(device_probe, speaker_probe),
639 DEVMETHOD(device_attach, speaker_attach),
640 DEVMETHOD(device_detach, speaker_detach),
641 DEVMETHOD(device_shutdown, bus_generic_shutdown),
642 DEVMETHOD(device_suspend, bus_generic_suspend),
643 DEVMETHOD(device_resume, bus_generic_resume),
647 static driver_t speaker_driver = {
653 static devclass_t speaker_devclass;
655 DRIVER_MODULE(speaker, isa, speaker_driver, speaker_devclass, 0, 0);
657 DRIVER_MODULE(speaker, acpi, speaker_driver, speaker_devclass, 0, 0);
660 /* spkr.c ends here */