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-rw-r--r--sys/dev/speaker/speaker.h30
-rw-r--r--sys/dev/speaker/spkr.c601
2 files changed, 631 insertions, 0 deletions
diff --git a/sys/dev/speaker/speaker.h b/sys/dev/speaker/speaker.h
new file mode 100644
index 0000000..78b55b6
--- /dev/null
+++ b/sys/dev/speaker/speaker.h
@@ -0,0 +1,30 @@
+/*
+ * speaker.h -- interface definitions for speaker ioctl()
+ *
+ * v1.4 by Eric S. Raymond (esr@snark.thyrsus.com) Aug 1993
+ * modified for FreeBSD by Andrew A. Chernov <ache@astral.msk.su>
+ *
+ * $FreeBSD$
+ */
+
+#ifndef _MACHINE_SPEAKER_H_
+#define _MACHINE_SPEAKER_H_
+
+#include <sys/ioccom.h>
+
+#define SPKRTONE _IOW('S', 1, tone_t) /* emit tone */
+#define SPKRTUNE _IO('S', 2) /* emit tone sequence*/
+
+typedef struct
+{
+ int frequency; /* in hertz */
+ int duration; /* in 1/100ths of a second */
+}
+tone_t;
+
+/*
+ * Strings written to the speaker device are interpreted as tunes and played;
+ * see the spkr(4) man page for details.
+ */
+
+#endif /* !_MACHINE_SPEAKER_H_ */
diff --git a/sys/dev/speaker/spkr.c b/sys/dev/speaker/spkr.c
new file mode 100644
index 0000000..f46ff94
--- /dev/null
+++ b/sys/dev/speaker/spkr.c
@@ -0,0 +1,601 @@
+/*
+ * spkr.c -- device driver for console speaker
+ *
+ * v1.4 by Eric S. Raymond (esr@snark.thyrsus.com) Aug 1993
+ * modified for FreeBSD by Andrew A. Chernov <ache@astral.msk.su>
+ *
+ * $FreeBSD$
+ */
+
+#include "speaker.h"
+
+#if NSPEAKER > 0
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/kernel.h>
+#include <sys/buf.h>
+#include <sys/uio.h>
+#include <sys/conf.h>
+#include <sys/ctype.h>
+#include <i386/isa/isa.h>
+#include <i386/isa/timerreg.h>
+#include <machine/clock.h>
+#include <machine/speaker.h>
+
+static d_open_t spkropen;
+static d_close_t spkrclose;
+static d_write_t spkrwrite;
+static d_ioctl_t spkrioctl;
+
+#define CDEV_MAJOR 26
+static struct cdevsw spkr_cdevsw = {
+ /* open */ spkropen,
+ /* close */ spkrclose,
+ /* read */ noread,
+ /* write */ spkrwrite,
+ /* ioctl */ spkrioctl,
+ /* poll */ nopoll,
+ /* mmap */ nommap,
+ /* strategy */ nostrategy,
+ /* name */ "spkr",
+ /* maj */ CDEV_MAJOR,
+ /* dump */ nodump,
+ /* psize */ nopsize,
+ /* flags */ 0,
+ /* bmaj */ -1
+};
+
+/**************** MACHINE DEPENDENT PART STARTS HERE *************************
+ *
+ * This section defines a function tone() which causes a tone of given
+ * frequency and duration from the ISA console speaker.
+ * Another function endtone() is defined to force sound off, and there is
+ * also a rest() entry point to do pauses.
+ *
+ * Audible sound is generated using the Programmable Interval Timer (PIT) and
+ * Programmable Peripheral Interface (PPI) attached to the ISA speaker. The
+ * PPI controls whether sound is passed through at all; the PIT's channel 2 is
+ * used to generate clicks (a square wave) of whatever frequency is desired.
+ */
+
+/*
+ * PPI control values.
+ * XXX should be in a header and used in clock.c.
+ */
+#define PPI_SPKR 0x03 /* turn these PPI bits on to pass sound */
+
+#define SPKRPRI PSOCK
+static char endtone, endrest;
+
+static void tone __P((unsigned int thz, unsigned int ticks));
+static void rest __P((int ticks));
+static void playinit __P((void));
+static void playtone __P((int pitch, int value, int sustain));
+static int abs __P((int n));
+static void playstring __P((char *cp, size_t slen));
+
+/* emit tone of frequency thz for given number of ticks */
+static void
+tone(thz, ticks)
+ unsigned int thz, ticks;
+{
+ unsigned int divisor;
+ int sps;
+
+ if (thz <= 0)
+ return;
+
+ divisor = timer_freq / thz;
+
+#ifdef DEBUG
+ (void) printf("tone: thz=%d ticks=%d\n", thz, ticks);
+#endif /* DEBUG */
+
+ /* set timer to generate clicks at given frequency in Hertz */
+ sps = splclock();
+
+ if (acquire_timer2(TIMER_SEL2 | TIMER_SQWAVE | TIMER_16BIT)) {
+ /* enter list of waiting procs ??? */
+ splx(sps);
+ return;
+ }
+ splx(sps);
+ disable_intr();
+ outb(TIMER_CNTR2, (divisor & 0xff)); /* send lo byte */
+ outb(TIMER_CNTR2, (divisor >> 8)); /* send hi byte */
+ enable_intr();
+
+ /* turn the speaker on */
+ outb(IO_PPI, inb(IO_PPI) | PPI_SPKR);
+
+ /*
+ * Set timeout to endtone function, then give up the timeslice.
+ * This is so other processes can execute while the tone is being
+ * emitted.
+ */
+ if (ticks > 0)
+ tsleep((caddr_t)&endtone, SPKRPRI | PCATCH, "spkrtn", ticks);
+ outb(IO_PPI, inb(IO_PPI) & ~PPI_SPKR);
+ sps = splclock();
+ release_timer2();
+ splx(sps);
+}
+
+/* rest for given number of ticks */
+static void
+rest(ticks)
+ int ticks;
+{
+ /*
+ * Set timeout to endrest function, then give up the timeslice.
+ * This is so other processes can execute while the rest is being
+ * waited out.
+ */
+#ifdef DEBUG
+ (void) printf("rest: %d\n", ticks);
+#endif /* DEBUG */
+ if (ticks > 0)
+ tsleep((caddr_t)&endrest, SPKRPRI | PCATCH, "spkrrs", ticks);
+}
+
+/**************** PLAY STRING INTERPRETER BEGINS HERE **********************
+ *
+ * Play string interpretation is modelled on IBM BASIC 2.0's PLAY statement;
+ * M[LNS] are missing; the ~ synonym and the _ slur mark and the octave-
+ * tracking facility are added.
+ * Requires tone(), rest(), and endtone(). String play is not interruptible
+ * except possibly at physical block boundaries.
+ */
+
+typedef int bool;
+#define TRUE 1
+#define FALSE 0
+
+#define dtoi(c) ((c) - '0')
+
+static int octave; /* currently selected octave */
+static int whole; /* whole-note time at current tempo, in ticks */
+static int value; /* whole divisor for note time, quarter note = 1 */
+static int fill; /* controls spacing of notes */
+static bool octtrack; /* octave-tracking on? */
+static bool octprefix; /* override current octave-tracking state? */
+
+/*
+ * Magic number avoidance...
+ */
+#define SECS_PER_MIN 60 /* seconds per minute */
+#define WHOLE_NOTE 4 /* quarter notes per whole note */
+#define MIN_VALUE 64 /* the most we can divide a note by */
+#define DFLT_VALUE 4 /* default value (quarter-note) */
+#define FILLTIME 8 /* for articulation, break note in parts */
+#define STACCATO 6 /* 6/8 = 3/4 of note is filled */
+#define NORMAL 7 /* 7/8ths of note interval is filled */
+#define LEGATO 8 /* all of note interval is filled */
+#define DFLT_OCTAVE 4 /* default octave */
+#define MIN_TEMPO 32 /* minimum tempo */
+#define DFLT_TEMPO 120 /* default tempo */
+#define MAX_TEMPO 255 /* max tempo */
+#define NUM_MULT 3 /* numerator of dot multiplier */
+#define DENOM_MULT 2 /* denominator of dot multiplier */
+
+/* letter to half-tone: A B C D E F G */
+static int notetab[8] = {9, 11, 0, 2, 4, 5, 7};
+
+/*
+ * This is the American Standard A440 Equal-Tempered scale with frequencies
+ * rounded to nearest integer. Thank Goddess for the good ol' CRC Handbook...
+ * our octave 0 is standard octave 2.
+ */
+#define OCTAVE_NOTES 12 /* semitones per octave */
+static int pitchtab[] =
+{
+/* C C# D D# E F F# G G# A A# B*/
+/* 0 */ 65, 69, 73, 78, 82, 87, 93, 98, 103, 110, 117, 123,
+/* 1 */ 131, 139, 147, 156, 165, 175, 185, 196, 208, 220, 233, 247,
+/* 2 */ 262, 277, 294, 311, 330, 349, 370, 392, 415, 440, 466, 494,
+/* 3 */ 523, 554, 587, 622, 659, 698, 740, 784, 831, 880, 932, 988,
+/* 4 */ 1047, 1109, 1175, 1245, 1319, 1397, 1480, 1568, 1661, 1760, 1865, 1975,
+/* 5 */ 2093, 2217, 2349, 2489, 2637, 2794, 2960, 3136, 3322, 3520, 3729, 3951,
+/* 6 */ 4186, 4435, 4698, 4978, 5274, 5588, 5920, 6272, 6644, 7040, 7459, 7902,
+};
+
+static void
+playinit()
+{
+ octave = DFLT_OCTAVE;
+ whole = (hz * SECS_PER_MIN * WHOLE_NOTE) / DFLT_TEMPO;
+ fill = NORMAL;
+ value = DFLT_VALUE;
+ octtrack = FALSE;
+ octprefix = TRUE; /* act as though there was an initial O(n) */
+}
+
+/* play tone of proper duration for current rhythm signature */
+static void
+playtone(pitch, value, sustain)
+ int pitch, value, sustain;
+{
+ register int sound, silence, snum = 1, sdenom = 1;
+
+ /* this weirdness avoids floating-point arithmetic */
+ for (; sustain; sustain--)
+ {
+ /* See the BUGS section in the man page for discussion */
+ snum *= NUM_MULT;
+ sdenom *= DENOM_MULT;
+ }
+
+ if (value == 0 || sdenom == 0)
+ return;
+
+ if (pitch == -1)
+ rest(whole * snum / (value * sdenom));
+ else
+ {
+ sound = (whole * snum) / (value * sdenom)
+ - (whole * (FILLTIME - fill)) / (value * FILLTIME);
+ silence = whole * (FILLTIME-fill) * snum / (FILLTIME * value * sdenom);
+
+#ifdef DEBUG
+ (void) printf("playtone: pitch %d for %d ticks, rest for %d ticks\n",
+ pitch, sound, silence);
+#endif /* DEBUG */
+
+ tone(pitchtab[pitch], sound);
+ if (fill != LEGATO)
+ rest(silence);
+ }
+}
+
+static int
+abs(n)
+ int n;
+{
+ if (n < 0)
+ return(-n);
+ else
+ return(n);
+}
+
+/* interpret and play an item from a notation string */
+static void
+playstring(cp, slen)
+ char *cp;
+ size_t slen;
+{
+ int pitch, oldfill, lastpitch = OCTAVE_NOTES * DFLT_OCTAVE;
+
+#define GETNUM(cp, v) for(v=0; isdigit(cp[1]) && slen > 0; ) \
+ {v = v * 10 + (*++cp - '0'); slen--;}
+ for (; slen--; cp++)
+ {
+ int sustain, timeval, tempo;
+ register char c = toupper(*cp);
+
+#ifdef DEBUG
+ (void) printf("playstring: %c (%x)\n", c, c);
+#endif /* DEBUG */
+
+ switch (c)
+ {
+ case 'A': case 'B': case 'C': case 'D': case 'E': case 'F': case 'G':
+
+ /* compute pitch */
+ pitch = notetab[c - 'A'] + octave * OCTAVE_NOTES;
+
+ /* this may be followed by an accidental sign */
+ if (cp[1] == '#' || cp[1] == '+')
+ {
+ ++pitch;
+ ++cp;
+ slen--;
+ }
+ else if (cp[1] == '-')
+ {
+ --pitch;
+ ++cp;
+ slen--;
+ }
+
+ /*
+ * If octave-tracking mode is on, and there has been no octave-
+ * setting prefix, find the version of the current letter note
+ * closest to the last regardless of octave.
+ */
+ if (octtrack && !octprefix)
+ {
+ if (abs(pitch-lastpitch) > abs(pitch+OCTAVE_NOTES-lastpitch))
+ {
+ ++octave;
+ pitch += OCTAVE_NOTES;
+ }
+
+ if (abs(pitch-lastpitch) > abs((pitch-OCTAVE_NOTES)-lastpitch))
+ {
+ --octave;
+ pitch -= OCTAVE_NOTES;
+ }
+ }
+ octprefix = FALSE;
+ lastpitch = pitch;
+
+ /* ...which may in turn be followed by an override time value */
+ GETNUM(cp, timeval);
+ if (timeval <= 0 || timeval > MIN_VALUE)
+ timeval = value;
+
+ /* ...and/or sustain dots */
+ for (sustain = 0; cp[1] == '.'; cp++)
+ {
+ slen--;
+ sustain++;
+ }
+
+ /* ...and/or a slur mark */
+ oldfill = fill;
+ if (cp[1] == '_')
+ {
+ fill = LEGATO;
+ ++cp;
+ slen--;
+ }
+
+ /* time to emit the actual tone */
+ playtone(pitch, timeval, sustain);
+
+ fill = oldfill;
+ break;
+
+ case 'O':
+ if (cp[1] == 'N' || cp[1] == 'n')
+ {
+ octprefix = octtrack = FALSE;
+ ++cp;
+ slen--;
+ }
+ else if (cp[1] == 'L' || cp[1] == 'l')
+ {
+ octtrack = TRUE;
+ ++cp;
+ slen--;
+ }
+ else
+ {
+ GETNUM(cp, octave);
+ if (octave >= sizeof(pitchtab) / sizeof(pitchtab[0]) / OCTAVE_NOTES)
+ octave = DFLT_OCTAVE;
+ octprefix = TRUE;
+ }
+ break;
+
+ case '>':
+ if (octave < sizeof(pitchtab) / sizeof(pitchtab[0]) / OCTAVE_NOTES - 1)
+ octave++;
+ octprefix = TRUE;
+ break;
+
+ case '<':
+ if (octave > 0)
+ octave--;
+ octprefix = TRUE;
+ break;
+
+ case 'N':
+ GETNUM(cp, pitch);
+ for (sustain = 0; cp[1] == '.'; cp++)
+ {
+ slen--;
+ sustain++;
+ }
+ oldfill = fill;
+ if (cp[1] == '_')
+ {
+ fill = LEGATO;
+ ++cp;
+ slen--;
+ }
+ playtone(pitch - 1, value, sustain);
+ fill = oldfill;
+ break;
+
+ case 'L':
+ GETNUM(cp, value);
+ if (value <= 0 || value > MIN_VALUE)
+ value = DFLT_VALUE;
+ break;
+
+ case 'P':
+ case '~':
+ /* this may be followed by an override time value */
+ GETNUM(cp, timeval);
+ if (timeval <= 0 || timeval > MIN_VALUE)
+ timeval = value;
+ for (sustain = 0; cp[1] == '.'; cp++)
+ {
+ slen--;
+ sustain++;
+ }
+ playtone(-1, timeval, sustain);
+ break;
+
+ case 'T':
+ GETNUM(cp, tempo);
+ if (tempo < MIN_TEMPO || tempo > MAX_TEMPO)
+ tempo = DFLT_TEMPO;
+ whole = (hz * SECS_PER_MIN * WHOLE_NOTE) / tempo;
+ break;
+
+ case 'M':
+ if (cp[1] == 'N' || cp[1] == 'n')
+ {
+ fill = NORMAL;
+ ++cp;
+ slen--;
+ }
+ else if (cp[1] == 'L' || cp[1] == 'l')
+ {
+ fill = LEGATO;
+ ++cp;
+ slen--;
+ }
+ else if (cp[1] == 'S' || cp[1] == 's')
+ {
+ fill = STACCATO;
+ ++cp;
+ slen--;
+ }
+ break;
+ }
+ }
+}
+
+/******************* UNIX DRIVER HOOKS BEGIN HERE **************************
+ *
+ * This section implements driver hooks to run playstring() and the tone(),
+ * endtone(), and rest() functions defined above.
+ */
+
+static int spkr_active = FALSE; /* exclusion flag */
+static struct buf *spkr_inbuf; /* incoming buf */
+
+int
+spkropen(dev, flags, fmt, p)
+ dev_t dev;
+ int flags;
+ int fmt;
+ struct proc *p;
+{
+#ifdef DEBUG
+ (void) printf("spkropen: entering with dev = %s\n", devtoname(dev));
+#endif /* DEBUG */
+
+ if (minor(dev) != 0)
+ return(ENXIO);
+ else if (spkr_active)
+ return(EBUSY);
+ else
+ {
+#ifdef DEBUG
+ (void) printf("spkropen: about to perform play initialization\n");
+#endif /* DEBUG */
+ playinit();
+ spkr_inbuf = geteblk(DEV_BSIZE);
+ spkr_active = TRUE;
+ return(0);
+ }
+}
+
+int
+spkrwrite(dev, uio, ioflag)
+ dev_t dev;
+ struct uio *uio;
+ int ioflag;
+{
+#ifdef DEBUG
+ printf("spkrwrite: entering with dev = %s, count = %d\n",
+ devtoname(dev), uio->uio_resid);
+#endif /* DEBUG */
+
+ if (minor(dev) != 0)
+ return(ENXIO);
+ else if (uio->uio_resid > (DEV_BSIZE - 1)) /* prevent system crashes */
+ return(E2BIG);
+ else
+ {
+ unsigned n;
+ char *cp;
+ int error;
+
+ n = uio->uio_resid;
+ cp = spkr_inbuf->b_data;
+ error = uiomove(cp, n, uio);
+ if (!error) {
+ cp[n] = '\0';
+ playstring(cp, n);
+ }
+ return(error);
+ }
+}
+
+int
+spkrclose(dev, flags, fmt, p)
+ dev_t dev;
+ int flags;
+ int fmt;
+ struct proc *p;
+{
+#ifdef DEBUG
+ (void) printf("spkrclose: entering with dev = %s\n", devtoname(dev));
+#endif /* DEBUG */
+
+ if (minor(dev) != 0)
+ return(ENXIO);
+ else
+ {
+ wakeup((caddr_t)&endtone);
+ wakeup((caddr_t)&endrest);
+ brelse(spkr_inbuf);
+ spkr_active = FALSE;
+ return(0);
+ }
+}
+
+int
+spkrioctl(dev, cmd, cmdarg, flags, p)
+ dev_t dev;
+ unsigned long cmd;
+ caddr_t cmdarg;
+ int flags;
+ struct proc *p;
+{
+#ifdef DEBUG
+ (void) printf("spkrioctl: entering with dev = %s, cmd = %lx\n",
+ devtoname(dev), cmd);
+#endif /* DEBUG */
+
+ if (minor(dev) != 0)
+ return(ENXIO);
+ else if (cmd == SPKRTONE)
+ {
+ tone_t *tp = (tone_t *)cmdarg;
+
+ if (tp->frequency == 0)
+ rest(tp->duration);
+ else
+ tone(tp->frequency, tp->duration);
+ return 0;
+ }
+ else if (cmd == SPKRTUNE)
+ {
+ tone_t *tp = (tone_t *)(*(caddr_t *)cmdarg);
+ tone_t ttp;
+ int error;
+
+ for (; ; tp++) {
+ error = copyin(tp, &ttp, sizeof(tone_t));
+ if (error)
+ return(error);
+ if (ttp.duration == 0)
+ break;
+ if (ttp.frequency == 0)
+ rest(ttp.duration);
+ else
+ tone(ttp.frequency, ttp.duration);
+ }
+ return(0);
+ }
+ return(EINVAL);
+}
+
+static void
+spkr_drvinit(void *unused)
+{
+ make_dev(&spkr_cdevsw, 0, UID_ROOT, GID_WHEEL, 0600, "speaker");
+}
+
+SYSINIT(spkrdev,SI_SUB_DRIVERS,SI_ORDER_MIDDLE+CDEV_MAJOR,spkr_drvinit,NULL)
+
+
+#endif /* NSPEAKER > 0 */
+/* spkr.c ends here */
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