685 lines
16 KiB
C
685 lines
16 KiB
C
/*
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* spkr.c -- device driver for console speaker
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*
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* v1.4 by Eric S. Raymond (esr@snark.thyrsus.com) Aug 1993
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* modified for FreeBSD by Andrew A. Chernov <ache@astral.msk.su>
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* modified for PC98 by Kakefuda
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/bus.h>
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#include <sys/kernel.h>
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#include <sys/module.h>
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#include <sys/uio.h>
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#include <sys/conf.h>
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#include <sys/ctype.h>
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#include <sys/malloc.h>
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#include <isa/isavar.h>
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#ifdef PC98
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#include <pc98/pc98/pc98.h>
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#else
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#include <i386/isa/isa.h>
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#endif
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#include <i386/isa/timerreg.h>
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#include <machine/clock.h>
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#include <machine/speaker.h>
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static d_open_t spkropen;
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static d_close_t spkrclose;
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static d_write_t spkrwrite;
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static d_ioctl_t spkrioctl;
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static struct cdevsw spkr_cdevsw = {
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.d_version = D_VERSION,
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.d_flags = D_NEEDGIANT,
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.d_open = spkropen,
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.d_close = spkrclose,
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.d_write = spkrwrite,
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.d_ioctl = spkrioctl,
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.d_name = "spkr",
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};
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static MALLOC_DEFINE(M_SPKR, "spkr", "Speaker buffer");
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/**************** MACHINE DEPENDENT PART STARTS HERE *************************
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*
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* This section defines a function tone() which causes a tone of given
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* frequency and duration from the ISA console speaker.
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* Another function endtone() is defined to force sound off, and there is
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* also a rest() entry point to do pauses.
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*
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* Audible sound is generated using the Programmable Interval Timer (PIT) and
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* Programmable Peripheral Interface (PPI) attached to the ISA speaker. The
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* PPI controls whether sound is passed through at all; the PIT's channel 2 is
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* used to generate clicks (a square wave) of whatever frequency is desired.
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*/
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/*
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* XXX PPI control values should be in a header and used in clock.c.
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*/
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#ifdef PC98
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#define SPKR_DESC "PC98 speaker"
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#define PPI_SPKR 0x08 /* turn these PPI bits on to pass sound */
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#define PIT_COUNT 0x3fdb /* PIT count address */
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#define SPEAKER_ON outb(IO_PPI, inb(IO_PPI) & ~PPI_SPKR)
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#define SPEAKER_OFF outb(IO_PPI, inb(IO_PPI) | PPI_SPKR)
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#define TIMER_ACQUIRE acquire_timer1(TIMER_SEL1 | TIMER_SQWAVE | TIMER_16BIT)
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#define TIMER_RELEASE release_timer1()
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#define SPEAKER_WRITE(val) { \
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outb(PIT_COUNT, (val & 0xff)); \
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outb(PIT_COUNT, (val >> 8)); \
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}
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#else
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#define SPKR_DESC "PC speaker"
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#define PPI_SPKR 0x03 /* turn these PPI bits on to pass sound */
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#define SPEAKER_ON outb(IO_PPI, inb(IO_PPI) | PPI_SPKR)
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#define SPEAKER_OFF outb(IO_PPI, inb(IO_PPI) & ~PPI_SPKR)
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#define TIMER_ACQUIRE acquire_timer2(TIMER_SEL2 | TIMER_SQWAVE | TIMER_16BIT)
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#define TIMER_RELEASE release_timer2()
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#define SPEAKER_WRITE(val) { \
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outb(TIMER_CNTR2, (val & 0xff)); \
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outb(TIMER_CNTR2, (val >> 8)); \
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}
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#endif
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#define SPKRPRI PSOCK
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static char endtone, endrest;
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static void tone(unsigned int thz, unsigned int ticks);
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static void rest(int ticks);
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static void playinit(void);
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static void playtone(int pitch, int value, int sustain);
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static void playstring(char *cp, size_t slen);
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/* emit tone of frequency thz for given number of ticks */
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static void
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tone(thz, ticks)
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unsigned int thz, ticks;
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{
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unsigned int divisor;
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int sps;
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if (thz <= 0)
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return;
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divisor = timer_freq / thz;
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#ifdef DEBUG
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(void) printf("tone: thz=%d ticks=%d\n", thz, ticks);
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#endif /* DEBUG */
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/* set timer to generate clicks at given frequency in Hertz */
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sps = splclock();
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if (TIMER_ACQUIRE) {
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/* enter list of waiting procs ??? */
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splx(sps);
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return;
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}
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splx(sps);
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disable_intr();
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SPEAKER_WRITE(divisor);
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enable_intr();
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/* turn the speaker on */
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SPEAKER_ON;
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/*
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* Set timeout to endtone function, then give up the timeslice.
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* This is so other processes can execute while the tone is being
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* emitted.
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*/
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if (ticks > 0)
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tsleep(&endtone, SPKRPRI | PCATCH, "spkrtn", ticks);
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SPEAKER_OFF;
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sps = splclock();
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TIMER_RELEASE;
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splx(sps);
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}
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/* rest for given number of ticks */
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static void
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rest(ticks)
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int ticks;
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{
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/*
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* Set timeout to endrest function, then give up the timeslice.
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* This is so other processes can execute while the rest is being
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* waited out.
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*/
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#ifdef DEBUG
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(void) printf("rest: %d\n", ticks);
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#endif /* DEBUG */
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if (ticks > 0)
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tsleep(&endrest, SPKRPRI | PCATCH, "spkrrs", ticks);
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}
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/**************** PLAY STRING INTERPRETER BEGINS HERE **********************
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*
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* Play string interpretation is modelled on IBM BASIC 2.0's PLAY statement;
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* M[LNS] are missing; the ~ synonym and the _ slur mark and the octave-
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* tracking facility are added.
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* Requires tone(), rest(), and endtone(). String play is not interruptible
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* except possibly at physical block boundaries.
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*/
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typedef int bool;
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#define TRUE 1
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#define FALSE 0
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#define dtoi(c) ((c) - '0')
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static int octave; /* currently selected octave */
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static int whole; /* whole-note time at current tempo, in ticks */
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static int value; /* whole divisor for note time, quarter note = 1 */
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static int fill; /* controls spacing of notes */
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static bool octtrack; /* octave-tracking on? */
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static bool octprefix; /* override current octave-tracking state? */
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/*
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* Magic number avoidance...
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*/
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#define SECS_PER_MIN 60 /* seconds per minute */
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#define WHOLE_NOTE 4 /* quarter notes per whole note */
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#define MIN_VALUE 64 /* the most we can divide a note by */
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#define DFLT_VALUE 4 /* default value (quarter-note) */
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#define FILLTIME 8 /* for articulation, break note in parts */
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#define STACCATO 6 /* 6/8 = 3/4 of note is filled */
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#define NORMAL 7 /* 7/8ths of note interval is filled */
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#define LEGATO 8 /* all of note interval is filled */
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#define DFLT_OCTAVE 4 /* default octave */
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#define MIN_TEMPO 32 /* minimum tempo */
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#define DFLT_TEMPO 120 /* default tempo */
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#define MAX_TEMPO 255 /* max tempo */
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#define NUM_MULT 3 /* numerator of dot multiplier */
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#define DENOM_MULT 2 /* denominator of dot multiplier */
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/* letter to half-tone: A B C D E F G */
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static int notetab[8] = {9, 11, 0, 2, 4, 5, 7};
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/*
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* This is the American Standard A440 Equal-Tempered scale with frequencies
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* rounded to nearest integer. Thank Goddess for the good ol' CRC Handbook...
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* our octave 0 is standard octave 2.
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*/
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#define OCTAVE_NOTES 12 /* semitones per octave */
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static int pitchtab[] =
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{
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/* C C# D D# E F F# G G# A A# B*/
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/* 0 */ 65, 69, 73, 78, 82, 87, 93, 98, 103, 110, 117, 123,
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/* 1 */ 131, 139, 147, 156, 165, 175, 185, 196, 208, 220, 233, 247,
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/* 2 */ 262, 277, 294, 311, 330, 349, 370, 392, 415, 440, 466, 494,
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/* 3 */ 523, 554, 587, 622, 659, 698, 740, 784, 831, 880, 932, 988,
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/* 4 */ 1047, 1109, 1175, 1245, 1319, 1397, 1480, 1568, 1661, 1760, 1865, 1975,
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/* 5 */ 2093, 2217, 2349, 2489, 2637, 2794, 2960, 3136, 3322, 3520, 3729, 3951,
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/* 6 */ 4186, 4435, 4698, 4978, 5274, 5588, 5920, 6272, 6644, 7040, 7459, 7902,
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};
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static void
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playinit()
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{
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octave = DFLT_OCTAVE;
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whole = (hz * SECS_PER_MIN * WHOLE_NOTE) / DFLT_TEMPO;
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fill = NORMAL;
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value = DFLT_VALUE;
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octtrack = FALSE;
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octprefix = TRUE; /* act as though there was an initial O(n) */
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}
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/* play tone of proper duration for current rhythm signature */
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static void
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playtone(pitch, value, sustain)
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int pitch, value, sustain;
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{
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register int sound, silence, snum = 1, sdenom = 1;
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/* this weirdness avoids floating-point arithmetic */
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for (; sustain; sustain--)
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{
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/* See the BUGS section in the man page for discussion */
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snum *= NUM_MULT;
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sdenom *= DENOM_MULT;
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}
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if (value == 0 || sdenom == 0)
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return;
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if (pitch == -1)
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rest(whole * snum / (value * sdenom));
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else
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{
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sound = (whole * snum) / (value * sdenom)
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- (whole * (FILLTIME - fill)) / (value * FILLTIME);
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silence = whole * (FILLTIME-fill) * snum / (FILLTIME * value * sdenom);
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#ifdef DEBUG
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(void) printf("playtone: pitch %d for %d ticks, rest for %d ticks\n",
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pitch, sound, silence);
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#endif /* DEBUG */
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tone(pitchtab[pitch], sound);
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if (fill != LEGATO)
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rest(silence);
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}
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}
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/* interpret and play an item from a notation string */
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static void
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playstring(cp, slen)
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char *cp;
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size_t slen;
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{
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int pitch, oldfill, lastpitch = OCTAVE_NOTES * DFLT_OCTAVE;
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#define GETNUM(cp, v) for(v=0; isdigit(cp[1]) && slen > 0; ) \
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{v = v * 10 + (*++cp - '0'); slen--;}
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for (; slen--; cp++)
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{
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int sustain, timeval, tempo;
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register char c = toupper(*cp);
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#ifdef DEBUG
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(void) printf("playstring: %c (%x)\n", c, c);
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#endif /* DEBUG */
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switch (c)
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{
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case 'A': case 'B': case 'C': case 'D': case 'E': case 'F': case 'G':
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/* compute pitch */
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pitch = notetab[c - 'A'] + octave * OCTAVE_NOTES;
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/* this may be followed by an accidental sign */
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if (cp[1] == '#' || cp[1] == '+')
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{
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++pitch;
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++cp;
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slen--;
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}
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else if (cp[1] == '-')
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{
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--pitch;
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++cp;
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slen--;
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}
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/*
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* If octave-tracking mode is on, and there has been no octave-
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* setting prefix, find the version of the current letter note
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* closest to the last regardless of octave.
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*/
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if (octtrack && !octprefix)
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{
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if (abs(pitch-lastpitch) > abs(pitch+OCTAVE_NOTES-lastpitch))
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{
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++octave;
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pitch += OCTAVE_NOTES;
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}
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if (abs(pitch-lastpitch) > abs((pitch-OCTAVE_NOTES)-lastpitch))
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{
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--octave;
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pitch -= OCTAVE_NOTES;
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}
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}
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octprefix = FALSE;
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lastpitch = pitch;
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/* ...which may in turn be followed by an override time value */
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GETNUM(cp, timeval);
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if (timeval <= 0 || timeval > MIN_VALUE)
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timeval = value;
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/* ...and/or sustain dots */
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for (sustain = 0; cp[1] == '.'; cp++)
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{
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slen--;
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sustain++;
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}
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/* ...and/or a slur mark */
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oldfill = fill;
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if (cp[1] == '_')
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{
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fill = LEGATO;
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++cp;
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slen--;
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}
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/* time to emit the actual tone */
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playtone(pitch, timeval, sustain);
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fill = oldfill;
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break;
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case 'O':
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if (cp[1] == 'N' || cp[1] == 'n')
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{
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octprefix = octtrack = FALSE;
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++cp;
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slen--;
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}
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else if (cp[1] == 'L' || cp[1] == 'l')
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{
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octtrack = TRUE;
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++cp;
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slen--;
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}
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else
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{
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GETNUM(cp, octave);
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if (octave >= sizeof(pitchtab) / sizeof(pitchtab[0]) / OCTAVE_NOTES)
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octave = DFLT_OCTAVE;
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octprefix = TRUE;
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}
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break;
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case '>':
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if (octave < sizeof(pitchtab) / sizeof(pitchtab[0]) / OCTAVE_NOTES - 1)
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octave++;
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octprefix = TRUE;
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break;
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case '<':
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if (octave > 0)
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octave--;
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octprefix = TRUE;
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break;
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case 'N':
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GETNUM(cp, pitch);
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for (sustain = 0; cp[1] == '.'; cp++)
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{
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slen--;
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sustain++;
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}
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oldfill = fill;
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if (cp[1] == '_')
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{
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fill = LEGATO;
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++cp;
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slen--;
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}
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playtone(pitch - 1, value, sustain);
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fill = oldfill;
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break;
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case 'L':
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GETNUM(cp, value);
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if (value <= 0 || value > MIN_VALUE)
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value = DFLT_VALUE;
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break;
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case 'P':
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case '~':
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/* this may be followed by an override time value */
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GETNUM(cp, timeval);
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if (timeval <= 0 || timeval > MIN_VALUE)
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timeval = value;
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for (sustain = 0; cp[1] == '.'; cp++)
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{
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slen--;
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sustain++;
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}
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playtone(-1, timeval, sustain);
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break;
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case 'T':
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GETNUM(cp, tempo);
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if (tempo < MIN_TEMPO || tempo > MAX_TEMPO)
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tempo = DFLT_TEMPO;
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whole = (hz * SECS_PER_MIN * WHOLE_NOTE) / tempo;
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break;
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case 'M':
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if (cp[1] == 'N' || cp[1] == 'n')
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{
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fill = NORMAL;
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++cp;
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slen--;
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}
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else if (cp[1] == 'L' || cp[1] == 'l')
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{
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fill = LEGATO;
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++cp;
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slen--;
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}
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else if (cp[1] == 'S' || cp[1] == 's')
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{
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fill = STACCATO;
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++cp;
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slen--;
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}
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break;
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}
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}
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}
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/******************* UNIX DRIVER HOOKS BEGIN HERE **************************
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*
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* This section implements driver hooks to run playstring() and the tone(),
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* endtone(), and rest() functions defined above.
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*/
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static int spkr_active = FALSE; /* exclusion flag */
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static char *spkr_inbuf; /* incoming buf */
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static int
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spkropen(dev, flags, fmt, td)
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struct cdev *dev;
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int flags;
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int fmt;
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struct thread *td;
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{
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#ifdef DEBUG
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(void) printf("spkropen: entering with dev = %s\n", devtoname(dev));
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#endif /* DEBUG */
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if (minor(dev) != 0)
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return(ENXIO);
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else if (spkr_active)
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return(EBUSY);
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else
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{
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#ifdef DEBUG
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(void) printf("spkropen: about to perform play initialization\n");
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#endif /* DEBUG */
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playinit();
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spkr_inbuf = malloc(DEV_BSIZE, M_SPKR, M_WAITOK);
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spkr_active = TRUE;
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return(0);
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}
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}
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static int
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spkrwrite(dev, uio, ioflag)
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struct cdev *dev;
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struct uio *uio;
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int ioflag;
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{
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#ifdef DEBUG
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printf("spkrwrite: entering with dev = %s, count = %d\n",
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devtoname(dev), uio->uio_resid);
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#endif /* DEBUG */
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if (minor(dev) != 0)
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return(ENXIO);
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else if (uio->uio_resid > (DEV_BSIZE - 1)) /* prevent system crashes */
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return(E2BIG);
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else
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{
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unsigned n;
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char *cp;
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int error;
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n = uio->uio_resid;
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cp = spkr_inbuf;
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error = uiomove(cp, n, uio);
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if (!error) {
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cp[n] = '\0';
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playstring(cp, n);
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}
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return(error);
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}
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}
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static int
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spkrclose(dev, flags, fmt, td)
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struct cdev *dev;
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int flags;
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|
int fmt;
|
|
struct thread *td;
|
|
{
|
|
#ifdef DEBUG
|
|
(void) printf("spkrclose: entering with dev = %s\n", devtoname(dev));
|
|
#endif /* DEBUG */
|
|
|
|
if (minor(dev) != 0)
|
|
return(ENXIO);
|
|
else
|
|
{
|
|
wakeup(&endtone);
|
|
wakeup(&endrest);
|
|
free(spkr_inbuf, M_SPKR);
|
|
spkr_active = FALSE;
|
|
return(0);
|
|
}
|
|
}
|
|
|
|
static int
|
|
spkrioctl(dev, cmd, cmdarg, flags, td)
|
|
struct cdev *dev;
|
|
unsigned long cmd;
|
|
caddr_t cmdarg;
|
|
int flags;
|
|
struct thread *td;
|
|
{
|
|
#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);
|
|
}
|
|
|
|
/*
|
|
* Install placeholder to claim the resources owned by the
|
|
* AT tone generator.
|
|
*/
|
|
static struct isa_pnp_id speaker_ids[] = {
|
|
#ifndef PC98
|
|
{ 0x0008d041 /* PNP0800 */, SPKR_DESC },
|
|
#endif
|
|
{ 0 }
|
|
};
|
|
|
|
static struct cdev *speaker_dev;
|
|
|
|
static int
|
|
speaker_probe(device_t dev)
|
|
{
|
|
int error;
|
|
|
|
error = ISA_PNP_PROBE(device_get_parent(dev), dev, speaker_ids);
|
|
|
|
/* PnP match */
|
|
if (error == 0)
|
|
return (0);
|
|
|
|
/* No match */
|
|
if (error == ENXIO)
|
|
return (ENXIO);
|
|
|
|
/* Not configured by hints. */
|
|
if (strncmp(device_get_name(dev), "speaker", 9))
|
|
return (ENXIO);
|
|
|
|
device_set_desc(dev, SPKR_DESC);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
speaker_attach(device_t dev)
|
|
{
|
|
|
|
if (speaker_dev) {
|
|
device_printf(dev, "Already attached!\n");
|
|
return (ENXIO);
|
|
}
|
|
|
|
speaker_dev = make_dev(&spkr_cdevsw, 0, UID_ROOT, GID_WHEEL, 0600,
|
|
"speaker");
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
speaker_detach(device_t dev)
|
|
{
|
|
destroy_dev(speaker_dev);
|
|
return (0);
|
|
}
|
|
|
|
static device_method_t speaker_methods[] = {
|
|
/* Device interface */
|
|
DEVMETHOD(device_probe, speaker_probe),
|
|
DEVMETHOD(device_attach, speaker_attach),
|
|
DEVMETHOD(device_detach, speaker_detach),
|
|
DEVMETHOD(device_shutdown, bus_generic_shutdown),
|
|
DEVMETHOD(device_suspend, bus_generic_suspend),
|
|
DEVMETHOD(device_resume, bus_generic_resume),
|
|
{ 0, 0 }
|
|
};
|
|
|
|
static driver_t speaker_driver = {
|
|
"speaker",
|
|
speaker_methods,
|
|
1, /* no softc */
|
|
};
|
|
|
|
static devclass_t speaker_devclass;
|
|
|
|
DRIVER_MODULE(speaker, isa, speaker_driver, speaker_devclass, 0, 0);
|
|
#ifndef PC98
|
|
DRIVER_MODULE(speaker, acpi, speaker_driver, speaker_devclass, 0, 0);
|
|
#endif
|
|
|
|
/* spkr.c ends here */
|