As warned: Initiate deorbit burn for the pcaudio driver.

7 files changed, 0 insertions, 1188 deletions

diff --git a/sys/conf/files.i386 b/sys/conf/files.i386
index 1985524..dcbaab7 100644
--- a/sys/conf/files.i386
+++ b/sys/conf/files.i386
@@ -254,7 +254,6 @@ i386/isa/istallion.c		optional	stli nowerror
 i386/isa/loran.c		optional	loran
 i386/isa/mse.c			optional	mse
 i386/isa/npx.c			optional	npx
-i386/isa/pcaudio.c		optional	pca
 i386/isa/pcf.c			optional	pcf
 i386/isa/pcvt/pcvt_drv.c	optional	vt
 i386/isa/pcvt/pcvt_ext.c	optional	vt
diff --git a/sys/conf/files.pc98 b/sys/conf/files.pc98
index 93a6736..641caf5 100644
--- a/sys/conf/files.pc98
+++ b/sys/conf/files.pc98
@@ -347,7 +347,6 @@ pc98/pc98/olpt.c		optional	olpt
 pc98/pc98/pc98gdc.c		optional	gdc
 pc98/pc98/pc98kbd.c		optional	pckbd
 pc98/pc98/pc98_machdep.c	standard
-pc98/pc98/pcaudio.c		optional	pca
 pc98/pc98/pmc.c			optional	pmc
 pc98/pc98/ppc.c			optional	ppc
 pc98/pc98/scgdcrndr.c		optional	sc gdc
diff --git a/sys/conf/majors b/sys/conf/majors
index d57c0b3..90333d4 100644
--- a/sys/conf/majors
+++ b/sys/conf/majors
@@ -37,7 +37,6 @@
 21	*psm		PS/2 Mouse
 22	*fd		(/dev/stdin etc)
 23	*bpf		Berkeley Packet Filter
-24	*pca		PC speaker (/dev/pcaudio)
 26	*spkr		PC speaker (/dev/spkr)
 27	*mse		Microsoft bus-mouse
 28	*sio		16450/16550 serial
diff --git a/sys/i386/conf/NOTES b/sys/i386/conf/NOTES
index 15e2cb9..c94c84d 100644
--- a/sys/i386/conf/NOTES
+++ b/sys/i386/conf/NOTES
@@ -532,15 +532,6 @@ options 	WLCACHE		# enables the signal-strength cache
 options 	WLDEBUG		# enables verbose debugging output
 
 #
-# Audio drivers: `pca'
-#
-# pca: PCM audio through your PC speaker
-
-device		pca
-hint.pca.0.at="isa"
-hint.pca.0.port="0x040"
-
-#
 # ATA raid adapters
 #
 device		pst
diff --git a/sys/i386/isa/pcaudio.c b/sys/i386/isa/pcaudio.c
deleted file mode 100644
index 1fc3b39..0000000
--- a/sys/i386/isa/pcaudio.c
+++ /dev/null
@@ -1,563 +0,0 @@
-/*-
- * Copyright (c) 1994-1998 Søren Schmidt
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer,
- *    without modification, immediately at the beginning of the file.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. The name of the author may not be used to endorse or promote products
- *    derived from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
- * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
- * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
- * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
- * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
- * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-#include <sys/cdefs.h>
-__FBSDID("$FreeBSD$");
-
-#include <sys/param.h>
-#include <sys/systm.h>
-#include <sys/conf.h>
-#include <sys/proc.h>
-#include <sys/kernel.h>
-#include <sys/bus.h>
-#include <sys/filio.h>
-#include <sys/poll.h>
-#include <sys/vnode.h>
-
-#include <machine/clock.h>
-#include <machine/pcaudioio.h>
-
-#include <isa/isareg.h>
-#include <isa/isavar.h>
-#include <i386/isa/timerreg.h>
-
-#define BUF_SIZE 	8192
-#define SAMPLE_RATE	8000
-#define INTERRUPT_RATE	16000
-
-static struct pca_status {
-	char		open;		/* device open */
-	char		queries;	/* did others try opening */
-	unsigned char	*buf[3];	/* triple buffering */
-	unsigned char   *buffer; 	/* current buffer ptr */
-	unsigned	in_use[3];	/* buffers fill */
-	unsigned	index;		/* index in current buffer */
-	unsigned	counter;	/* sample counter */
-	unsigned	scale;		/* sample counter scale */
-	unsigned	sample_rate;	/* sample rate */
-	unsigned	processed;	/* samples processed */
-	unsigned	volume;		/* volume for pc-speaker */
-	char		encoding;	/* Ulaw, Alaw or linear */
-	u_char		current;	/* current buffer */
-	unsigned char	oldval;		/* old timer port value */
-	char		timer_on;	/* is playback running */
-	struct selinfo	wsel;		/* select/poll status */
-} pca_status;
-
-static char buffer1[BUF_SIZE];
-static char buffer2[BUF_SIZE];
-static char buffer3[BUF_SIZE];
-static char volume_table[256];
-
-static unsigned char ulaw_dsp[] = {
-     3,    7,   11,   15,   19,   23,   27,   31,
-    35,   39,   43,   47,   51,   55,   59,   63,
-    66,   68,   70,   72,   74,   76,   78,   80,
-    82,   84,   86,   88,   90,   92,   94,   96,
-    98,   99,  100,  101,  102,  103,  104,  105,
-   106,  107,  108,  109,  110,  111,  112,  113,
-   113,  114,  114,  115,  115,  116,  116,  117,
-   117,  118,  118,  119,  119,  120,  120,  121,
-   121,  121,  122,  122,  122,  122,  123,  123,
-   123,  123,  124,  124,  124,  124,  125,  125,
-   125,  125,  125,  125,  126,  126,  126,  126,
-   126,  126,  126,  126,  127,  127,  127,  127,
-   127,  127,  127,  127,  127,  127,  127,  127,
-   128,  128,  128,  128,  128,  128,  128,  128,
-   128,  128,  128,  128,  128,  128,  128,  128,
-   128,  128,  128,  128,  128,  128,  128,  128,
-   253,  249,  245,  241,  237,  233,  229,  225,
-   221,  217,  213,  209,  205,  201,  197,  193,
-   190,  188,  186,  184,  182,  180,  178,  176,
-   174,  172,  170,  168,  166,  164,  162,  160,
-   158,  157,  156,  155,  154,  153,  152,  151,
-   150,  149,  148,  147,  146,  145,  144,  143,
-   143,  142,  142,  141,  141,  140,  140,  139,
-   139,  138,  138,  137,  137,  136,  136,  135,
-   135,  135,  134,  134,  134,  134,  133,  133,
-   133,  133,  132,  132,  132,  132,  131,  131,
-   131,  131,  131,  131,  130,  130,  130,  130,
-   130,  130,  130,  130,  129,  129,  129,  129,
-   129,  129,  129,  129,  129,  129,  129,  129,
-   128,  128,  128,  128,  128,  128,  128,  128,
-   128,  128,  128,  128,  128,  128,  128,  128,
-   128,  128,  128,  128,  128,  128,  128,  128,
-};
-
-static unsigned char alaw_linear[] = {
-	45, 	214, 	122, 	133, 	0, 		255, 	107, 	149, 
-	86, 	171, 	126, 	129, 	0, 		255, 	117, 	138, 
-	13, 	246, 	120, 	135, 	0, 		255, 	99, 	157, 
-	70, 	187, 	124, 	131, 	0, 		255, 	113, 	142, 
-	61, 	198, 	123, 	132,  	0, 		255, 	111, 	145, 
-	94, 	163, 	127, 	128, 	0, 		255, 	119, 	136, 
-	29, 	230, 	121, 	134, 	0, 		255, 	103, 	153, 
-	78, 	179, 	125, 	130, 	0, 		255, 	115, 	140, 
-	37, 	222, 	122, 	133, 	0, 		255, 	105, 	151, 
-	82, 	175, 	126, 	129, 	0, 		255, 	116, 	139, 
-	5, 	254, 	120, 	135, 	0, 		255, 	97, 	159, 
-	66, 	191, 	124, 	131, 	0, 		255, 	112,	143, 
-	53, 	206, 	123, 	132, 	0, 		255, 	109, 	147, 
-	90, 	167, 	127, 	128, 	0, 		255,	118, 	137, 
-	21, 	238, 	121, 	134, 	0, 		255, 	101,	155, 
-	74, 	183, 	125, 	130, 	0, 		255, 	114, 	141, 
-	49, 	210, 	123, 	133, 	0, 		255, 	108, 	148, 
-	88, 	169, 	127, 	129, 	0, 		255, 	118, 	138, 
-	17, 	242, 	121, 	135, 	0, 		255, 	100, 	156, 
-	72, 	185, 	125, 	131, 	0, 		255, 	114, 	142, 
-	64, 	194, 	124, 	132, 	0, 		255, 	112, 	144, 
-	96, 	161, 	128, 	128, 	1, 		255, 	120, 	136, 
-	33, 	226, 	122, 	134, 	0, 		255, 	104, 	152, 
-	80, 	177, 	126, 	130, 	0, 		255, 	116, 	140, 
-	41, 	218, 	122, 	133, 	0, 		255, 	106, 	150, 
-	84, 	173, 	126, 	129, 	0, 		255, 	117, 	139, 
-	9, 	250, 	120, 	135, 	0, 		255, 	98, 	158, 
-	68, 	189, 	124, 	131, 	0, 		255, 	113, 	143, 
-	57, 	202, 	123, 	132, 	0, 		255, 	110, 	146, 
-	92, 	165, 	127, 	128, 	0, 		255, 	119, 	137, 
-	25, 	234, 	121, 	134, 	0, 		255, 	102, 	154, 
-	76, 	181, 	125, 	130, 	0, 		255, 	115, 	141, 
-};
-
-static int pca_sleep = 0;
-
-static void pcaintr(struct clockframe *frame);
-
-static	d_open_t	pcaopen;
-static	d_close_t	pcaclose;
-static	d_write_t	pcawrite;
-static	d_ioctl_t	pcaioctl;
-static	d_poll_t	pcapoll;
-
-#define CDEV_MAJOR 24
-static struct cdevsw pca_cdevsw = {
-	.d_open =	pcaopen,
-	.d_close =	pcaclose,
-	.d_write =	pcawrite,
-	.d_ioctl =	pcaioctl,
-	.d_poll =	pcapoll,
-	.d_name =	"pca",
-	.d_maj =	CDEV_MAJOR,
-};
-
-static void pca_continue(void);
-static void pca_init(void);
-static void pca_pause(void);
-
-static void
-conv(const unsigned char *table, unsigned char *buff, unsigned n)
-{
-	unsigned i;
-
-	for (i = 0; i < n; i++)
-		buff[i] = table[buff[i]];
-}
-
-
-static void
-pca_volume(int volume)
-{
-	int i, j;
-
-	for (i=0; i<256; i++) {
-		j = ((i-128)*volume)/25;
-/* XXX
-		j = ((i-128)*volume)/100;
-*/
-		if (j<-128)
-			j = -128;
-		if (j>127)
-			j = 127;
-		volume_table[i] = (((255-(j + 128))/4)+1);
-	}
-}
-
-
-static void
-pca_init(void)
-{
-	pca_status.open = 0;
-	pca_status.queries = 0;
-	pca_status.timer_on = 0;
-	pca_status.buf[0] = (unsigned char *)&buffer1[0];
-	pca_status.buf[1] = (unsigned char *)&buffer2[0];
-	pca_status.buf[2] = (unsigned char *)&buffer3[0];
-	pca_status.buffer = pca_status.buf[0];
-	pca_status.in_use[0] = pca_status.in_use[1] = pca_status.in_use[2] = 0;
-	pca_status.current = 0;
-	pca_status.sample_rate = SAMPLE_RATE;
-	pca_status.scale = (pca_status.sample_rate << 8) / INTERRUPT_RATE;
-	pca_status.encoding = AUDIO_ENCODING_ULAW;
-	pca_status.volume = 100;
-
-	pca_volume(pca_status.volume);
-}
-
-
-static int
-pca_start(void)
-{
-	int x = splhigh();
-	int rv = 0;
-
-	/* use the first buffer */
-	pca_status.current  = 0;
-	pca_status.index = 0;
-	pca_status.counter = 0;
-        pca_status.buffer  = pca_status.buf[pca_status.current];
-        pca_status.oldval = inb(IO_PPI) | 0x03;
-        /* acquire the timers */
-	if (acquire_timer2(TIMER_LSB|TIMER_ONESHOT))
-		rv = -1;
-	else if (acquire_timer0(INTERRUPT_RATE, pcaintr)) {
-		release_timer2();
-		rv =  -1;
-	} else
-		pca_status.timer_on = 1;
-
-	splx(x);
-	return rv;
-}
-
-
-static void
-pca_stop(void)
-{
-	int x = splhigh();
-
-	/* release the timers */
-	release_timer0();
-	release_timer2();
-	/* reset the buffer */
-	pca_status.in_use[0] = pca_status.in_use[1] = pca_status.in_use[2] = 0;
-	pca_status.index = 0;
-	pca_status.counter = 0;
-	pca_status.current = 0;
-	pca_status.buffer = pca_status.buf[pca_status.current];
-	pca_status.timer_on = 0;
-	splx(x);
-}
-
-
-static void
-pca_pause(void)
-{
-	int x = splhigh();
-
-	release_timer0();
-	release_timer2();
-	pca_status.timer_on = 0;
-	splx(x);
-}
-
-
-static void
-pca_continue(void)
-{
-	int x = splhigh();
-
-        pca_status.oldval = inb(IO_PPI) | 0x03;
-	acquire_timer2(TIMER_LSB|TIMER_ONESHOT);
-	acquire_timer0(INTERRUPT_RATE, pcaintr);
-	pca_status.timer_on = 1;
-	splx(x);
-}
-
-
-static int
-pca_wait(void)
-{
-	int error, x;
-
-	if (!pca_status.timer_on)
-		return 0;
-
-	while (pca_status.in_use[0] || pca_status.in_use[1] ||
-	    pca_status.in_use[2]) {
-		x = spltty();
-		pca_sleep = 1;
-		error = tsleep(&pca_sleep, PZERO|PCATCH, "pca_drain", 0);
-		pca_sleep = 0;
-		splx(x);
-		if (error != 0 && error != ERESTART) {
-			pca_stop();
-			return error;
-		}
-        }
-        return 0;
-}
-
-
-static struct isa_pnp_id pca_ids[] = {
-	{0x0008d041, "AT-style speaker sound"},	/* PNP0800 */
-	{0}
-};
-
-static int
-pcaprobe(device_t dev)
-{
-	/* Check isapnp ids */
-	return ISA_PNP_PROBE(device_get_parent(dev), dev, pca_ids);
-}
-
-
-static int
-pcaattach(device_t dev)
-{
-	pca_init();
-	make_dev(&pca_cdevsw, 0, 0, 0, 0600, "pcaudio");
-	make_dev(&pca_cdevsw, 128, 0, 0, 0600, "pcaudioctl");
-	return 0;
-}
-
-static device_method_t pca_methods[] = {
-	DEVMETHOD(device_probe,		pcaprobe),
-	DEVMETHOD(device_attach,	pcaattach),
-	{ 0, 0 }
-};
-
-static driver_t pca_driver = {
-	"pca",
-	pca_methods,
-	1
-};
-
-static devclass_t pca_devclass;
-
-DRIVER_MODULE(pca, isa, pca_driver, pca_devclass, 0, 0);
-
-
-static int
-pcaopen(dev_t dev, int flags, int fmt, struct thread *td)
-{
-	/* audioctl device can always be opened */
-	if (minor(dev) == 128)
-		return 0;
-	if (minor(dev) > 0)
-		return ENXIO;
-
-	/* audio device can only be open by one process */
-	if (pca_status.open) {
-		pca_status.queries = 1;
-		return EBUSY;
-	}
-	pca_status.buffer = pca_status.buf[0];
-	pca_status.in_use[0] = pca_status.in_use[1] = pca_status.in_use[2] = 0;
-	pca_status.timer_on = 0;
-	pca_status.open = 1;
-	pca_status.processed = 0;
-	return 0;
-}
-
-
-static int
-pcaclose(dev_t dev, int flags, int fmt, struct thread *td)
-{
-	/* audioctl device can always be closed */
-	if (minor(dev) == 128)
-		return 0;
-	if (minor(dev) > 0)
-		return ENXIO;
-	/* audio device close drains all output and restores timers */
-	pca_wait();
-	pca_stop();
-	pca_status.open = 0;
-	return 0;
-}
-
-
-static int
-pcawrite(dev_t dev, struct uio *uio, int flag)
-{
-	int count, error, which, x;
-
-	/* only audio device can be written */
-	if (minor(dev) > 0)
-		return ENXIO;
-
-	while ((count = min(BUF_SIZE, uio->uio_resid)) > 0) {
-		if (pca_status.in_use[0] && pca_status.in_use[1] &&
-		    pca_status.in_use[2]) {
-			if (flag & IO_NDELAY)
-				return EWOULDBLOCK;
-			x = spltty();
-			pca_sleep = 1;
-			error = tsleep(&pca_sleep, PZERO|PCATCH, "pca_wait", 0);
-			pca_sleep = 0;
-			splx(x);
-			if (error != 0 && error != ERESTART) {
-				pca_stop();
-				return error;
-			}
-		}
-		if (!pca_status.in_use[0])
-			which = 0;
-		else if (!pca_status.in_use[1])
-			which = 1;
-		else
-			which = 2;
-		if (count && !pca_status.in_use[which]) {
-			uiomove(pca_status.buf[which], count, uio);
-			pca_status.processed += count;
-			switch (pca_status.encoding) {
-			case AUDIO_ENCODING_ULAW:
-				conv(ulaw_dsp, pca_status.buf[which], count);
-				break;
-
-			case AUDIO_ENCODING_ALAW:
-				conv(alaw_linear, pca_status.buf[which], count);
-				break;
-
-			case AUDIO_ENCODING_RAW:
-				break;
-			}
-			pca_status.in_use[which] = count;
-			if (!pca_status.timer_on)
-				if (pca_start())
-					return EBUSY;
-		}
-	}
-	return 0;
-}
-
-
-static int
-pcaioctl(dev_t dev, u_long cmd, caddr_t data, int flag, struct thread *td)
-{
-	audio_info_t *auptr;
-
-	switch(cmd) {
-
-	case AUDIO_GETINFO:
-		auptr = (audio_info_t *)data;
-		auptr->play.sample_rate = pca_status.sample_rate;
-		auptr->play.channels = 1;
-		auptr->play.precision = 8;
-		auptr->play.encoding = pca_status.encoding;
-
-		auptr->play.gain = pca_status.volume;
-		auptr->play.port = 0;
-
-		auptr->play.samples = pca_status.processed;
-		auptr->play.eof = 0;
-		auptr->play.pause = !pca_status.timer_on;
-		auptr->play.error = 0;
-		auptr->play.waiting = pca_status.queries;
-
-		auptr->play.open = pca_status.open;
-		auptr->play.active = pca_status.timer_on;
-		return 0;
-
-	case AUDIO_SETINFO:
-		auptr = (audio_info_t *)data;
-		if (auptr->play.sample_rate != (unsigned int)~0) {
-			pca_status.sample_rate = auptr->play.sample_rate;
-			pca_status.scale =
-				(pca_status.sample_rate << 8) / INTERRUPT_RATE;
-		}
-		if (auptr->play.encoding != (unsigned int)~0) {
-			pca_status.encoding = auptr->play.encoding;
-		}
-		if (auptr->play.gain != (unsigned int)~0) {
-			pca_status.volume = auptr->play.gain;
-			pca_volume(pca_status.volume);
-		}
-		if (auptr->play.pause != (unsigned char)~0) {
-			if (auptr->play.pause)
-				pca_pause();
-			else
-				pca_continue();
-		}
-
-		return 0;
-
-	case AUDIO_DRAIN:
-	case AUDIO_COMPAT_DRAIN:
-		return pca_wait();
-
-	case AUDIO_FLUSH:
-	case AUDIO_COMPAT_FLUSH:
-		pca_stop();
-		return 0;
-	case FIONBIO:
-		return 0;
-	}
-	return ENXIO;
-}
-
-
-static void
-pcaintr(struct clockframe *frame)
-{
-	if (pca_status.index < pca_status.in_use[pca_status.current]) {
-		disable_intr();
-		__asm__("outb %0,$0x61\n"
-			"andb $0xFE,%0\n"
-			"outb %0,$0x61"
-			: : "a" ((char)pca_status.oldval) );
-		__asm__("xlatb\n"
-			"outb %0,$0x42"
-			: : "a" ((char)pca_status.buffer[pca_status.index]),
-			    "b" (volume_table) );
-		enable_intr();
-		pca_status.counter += pca_status.scale;
-		pca_status.index = (pca_status.counter >> 8);
-	}
-	if (pca_status.index >= pca_status.in_use[pca_status.current]) {
-		pca_status.index = pca_status.counter = 0;
-		pca_status.in_use[pca_status.current] = 0;
-		pca_status.current++;
- 		if (pca_status.current > 2)
- 			pca_status.current = 0;
-		pca_status.buffer = pca_status.buf[pca_status.current];
-		if (pca_sleep)
-			wakeup(&pca_sleep);
-		if (SEL_WAITING(&pca_status.wsel))
-			selwakeup(&pca_status.wsel);
-	}
-}
-
-
-static int
-pcapoll(dev_t dev, int events, struct thread *td)
-{
- 	int s;
-	int revents = 0;
-
- 	s = spltty();
-
-	if (events & (POLLOUT | POLLWRNORM)) {
- 		if (!pca_status.in_use[0] || !pca_status.in_use[1] ||
- 		    !pca_status.in_use[2])
- 			revents |= events & (POLLOUT | POLLWRNORM);
- 		else
-			selrecord(td, &pca_status.wsel);
-	}
-	splx(s);
-	return (revents);
-}
diff --git a/sys/pc98/conf/NOTES b/sys/pc98/conf/NOTES
index 5a2dc3a..1f0eaad 100644
--- a/sys/pc98/conf/NOTES
+++ b/sys/pc98/conf/NOTES
@@ -473,15 +473,6 @@ hint.wl.0.port="0x300"
 options 	WLCACHE		# enables the signal-strength cache
 options 	WLDEBUG		# enables verbose debugging output
 
-#
-# Audio drivers: `pca'
-#
-# pca: PCM audio through your PC speaker
-
-device		pca
-hint.pca.0.at="isa"
-hint.pca.0.port="0x040"
-
 # 
 # SCSI host adapters:
 # 
diff --git a/sys/pc98/pc98/pcaudio.c b/sys/pc98/pc98/pcaudio.c
deleted file mode 100644
index 8bab0f3..0000000
--- a/sys/pc98/pc98/pcaudio.c
+++ /dev/null
@@ -1,604 +0,0 @@
-/*-
- * Copyright (c) 1994-1998 Sen Schmidt
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer,
- *    without modification, immediately at the beginning of the file.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. The name of the author may not be used to endorse or promote products
- *    derived from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
- * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
- * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
- * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
- * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
- * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- * $FreeBSD$
- */
-
-#include <sys/param.h>
-#include <sys/systm.h>
-#include <sys/conf.h>
-#include <sys/proc.h>
-#include <sys/kernel.h>
-#include <sys/bus.h>
-#include <sys/filio.h>
-#include <sys/poll.h>
-#include <sys/vnode.h>
-
-#include <machine/clock.h>
-#include <machine/pcaudioio.h>
-
-#ifdef PC98
-#include <pc98/pc98/pc98.h>
-#else
-#include <isa/isareg.h>
-#endif
-#include <isa/isavar.h>
-#include <i386/isa/timerreg.h>
-
-#define BUF_SIZE 	8192
-#define SAMPLE_RATE	8000
-#define INTERRUPT_RATE	16000
-
-static struct pca_status {
-	char		open;		/* device open */
-	char		queries;	/* did others try opening */
-	unsigned char	*buf[3];	/* triple buffering */
-	unsigned char   *buffer; 	/* current buffer ptr */
-	unsigned	in_use[3];	/* buffers fill */
-	unsigned	index;		/* index in current buffer */
-	unsigned	counter;	/* sample counter */
-	unsigned	scale;		/* sample counter scale */
-	unsigned	sample_rate;	/* sample rate */
-	unsigned	processed;	/* samples processed */
-	unsigned	volume;		/* volume for pc-speaker */
-	char		encoding;	/* Ulaw, Alaw or linear */
-	u_char		current;	/* current buffer */
-	unsigned char	oldval;		/* old timer port value */
-	char		timer_on;	/* is playback running */
-	struct selinfo	wsel;		/* select/poll status */
-} pca_status;
-
-static char buffer1[BUF_SIZE];
-static char buffer2[BUF_SIZE];
-static char buffer3[BUF_SIZE];
-static char volume_table[256];
-
-static unsigned char ulaw_dsp[] = {
-     3,    7,   11,   15,   19,   23,   27,   31,
-    35,   39,   43,   47,   51,   55,   59,   63,
-    66,   68,   70,   72,   74,   76,   78,   80,
-    82,   84,   86,   88,   90,   92,   94,   96,
-    98,   99,  100,  101,  102,  103,  104,  105,
-   106,  107,  108,  109,  110,  111,  112,  113,
-   113,  114,  114,  115,  115,  116,  116,  117,
-   117,  118,  118,  119,  119,  120,  120,  121,
-   121,  121,  122,  122,  122,  122,  123,  123,
-   123,  123,  124,  124,  124,  124,  125,  125,
-   125,  125,  125,  125,  126,  126,  126,  126,
-   126,  126,  126,  126,  127,  127,  127,  127,
-   127,  127,  127,  127,  127,  127,  127,  127,
-   128,  128,  128,  128,  128,  128,  128,  128,
-   128,  128,  128,  128,  128,  128,  128,  128,
-   128,  128,  128,  128,  128,  128,  128,  128,
-   253,  249,  245,  241,  237,  233,  229,  225,
-   221,  217,  213,  209,  205,  201,  197,  193,
-   190,  188,  186,  184,  182,  180,  178,  176,
-   174,  172,  170,  168,  166,  164,  162,  160,
-   158,  157,  156,  155,  154,  153,  152,  151,
-   150,  149,  148,  147,  146,  145,  144,  143,
-   143,  142,  142,  141,  141,  140,  140,  139,
-   139,  138,  138,  137,  137,  136,  136,  135,
-   135,  135,  134,  134,  134,  134,  133,  133,
-   133,  133,  132,  132,  132,  132,  131,  131,
-   131,  131,  131,  131,  130,  130,  130,  130,
-   130,  130,  130,  130,  129,  129,  129,  129,
-   129,  129,  129,  129,  129,  129,  129,  129,
-   128,  128,  128,  128,  128,  128,  128,  128,
-   128,  128,  128,  128,  128,  128,  128,  128,
-   128,  128,  128,  128,  128,  128,  128,  128,
-};
-
-static unsigned char alaw_linear[] = {
-	45, 	214, 	122, 	133, 	0, 		255, 	107, 	149, 
-	86, 	171, 	126, 	129, 	0, 		255, 	117, 	138, 
-	13, 	246, 	120, 	135, 	0, 		255, 	99, 	157, 
-	70, 	187, 	124, 	131, 	0, 		255, 	113, 	142, 
-	61, 	198, 	123, 	132,  	0, 		255, 	111, 	145, 
-	94, 	163, 	127, 	128, 	0, 		255, 	119, 	136, 
-	29, 	230, 	121, 	134, 	0, 		255, 	103, 	153, 
-	78, 	179, 	125, 	130, 	0, 		255, 	115, 	140, 
-	37, 	222, 	122, 	133, 	0, 		255, 	105, 	151, 
-	82, 	175, 	126, 	129, 	0, 		255, 	116, 	139, 
-	5, 	254, 	120, 	135, 	0, 		255, 	97, 	159, 
-	66, 	191, 	124, 	131, 	0, 		255, 	112,	143, 
-	53, 	206, 	123, 	132, 	0, 		255, 	109, 	147, 
-	90, 	167, 	127, 	128, 	0, 		255,	118, 	137, 
-	21, 	238, 	121, 	134, 	0, 		255, 	101,	155, 
-	74, 	183, 	125, 	130, 	0, 		255, 	114, 	141, 
-	49, 	210, 	123, 	133, 	0, 		255, 	108, 	148, 
-	88, 	169, 	127, 	129, 	0, 		255, 	118, 	138, 
-	17, 	242, 	121, 	135, 	0, 		255, 	100, 	156, 
-	72, 	185, 	125, 	131, 	0, 		255, 	114, 	142, 
-	64, 	194, 	124, 	132, 	0, 		255, 	112, 	144, 
-	96, 	161, 	128, 	128, 	1, 		255, 	120, 	136, 
-	33, 	226, 	122, 	134, 	0, 		255, 	104, 	152, 
-	80, 	177, 	126, 	130, 	0, 		255, 	116, 	140, 
-	41, 	218, 	122, 	133, 	0, 		255, 	106, 	150, 
-	84, 	173, 	126, 	129, 	0, 		255, 	117, 	139, 
-	9, 	250, 	120, 	135, 	0, 		255, 	98, 	158, 
-	68, 	189, 	124, 	131, 	0, 		255, 	113, 	143, 
-	57, 	202, 	123, 	132, 	0, 		255, 	110, 	146, 
-	92, 	165, 	127, 	128, 	0, 		255, 	119, 	137, 
-	25, 	234, 	121, 	134, 	0, 		255, 	102, 	154, 
-	76, 	181, 	125, 	130, 	0, 		255, 	115, 	141, 
-};
-
-static int pca_sleep = 0;
-
-static void pcaintr(struct clockframe *frame);
-
-static	d_open_t	pcaopen;
-static	d_close_t	pcaclose;
-static	d_write_t	pcawrite;
-static	d_ioctl_t	pcaioctl;
-static	d_poll_t	pcapoll;
-
-#define CDEV_MAJOR 24
-static struct cdevsw pca_cdevsw = {
-	.d_open =	pcaopen,
-	.d_close =	pcaclose,
-	.d_write =	pcawrite,
-	.d_ioctl =	pcaioctl,
-	.d_poll =	pcapoll,
-	.d_name =	"pca",
-	.d_maj =	CDEV_MAJOR,
-};
-
-static void pca_continue(void);
-static void pca_init(void);
-static void pca_pause(void);
-
-static void
-conv(const unsigned char *table, unsigned char *buff, unsigned n)
-{
-	unsigned i;
-
-	for (i = 0; i < n; i++)
-		buff[i] = table[buff[i]];
-}
-
-
-static void
-pca_volume(int volume)
-{
-	int i, j;
-
-	for (i=0; i<256; i++) {
-		j = ((i-128)*volume)/25;
-/* XXX
-		j = ((i-128)*volume)/100;
-*/
-		if (j<-128)
-			j = -128;
-		if (j>127)
-			j = 127;
-		volume_table[i] = (((255-(j + 128))/4)+1);
-	}
-}
-
-
-static void
-pca_init(void)
-{
-	pca_status.open = 0;
-	pca_status.queries = 0;
-	pca_status.timer_on = 0;
-	pca_status.buf[0] = (unsigned char *)&buffer1[0];
-	pca_status.buf[1] = (unsigned char *)&buffer2[0];
-	pca_status.buf[2] = (unsigned char *)&buffer3[0];
-	pca_status.buffer = pca_status.buf[0];
-	pca_status.in_use[0] = pca_status.in_use[1] = pca_status.in_use[2] = 0;
-	pca_status.current = 0;
-	pca_status.sample_rate = SAMPLE_RATE;
-	pca_status.scale = (pca_status.sample_rate << 8) / INTERRUPT_RATE;
-	pca_status.encoding = AUDIO_ENCODING_ULAW;
-	pca_status.volume = 100;
-
-	pca_volume(pca_status.volume);
-}
-
-
-static int
-pca_start(void)
-{
-	int x = splhigh();
-	int rv = 0;
-
-	/* use the first buffer */
-	pca_status.current  = 0;
-	pca_status.index = 0;
-	pca_status.counter = 0;
-        pca_status.buffer  = pca_status.buf[pca_status.current];
-#ifdef PC98
-        pca_status.oldval = inb(IO_PPI) & ~0x08;
-#else
-        pca_status.oldval = inb(IO_PPI) | 0x03;
-#endif
-        /* acquire the timers */
-#ifdef PC98
-	if (acquire_timer1(TIMER_LSB|TIMER_ONESHOT))
-#else
-	if (acquire_timer2(TIMER_LSB|TIMER_ONESHOT))
-#endif
-		rv = -1;
-	else if (acquire_timer0(INTERRUPT_RATE, pcaintr)) {
-#ifdef PC98
-		release_timer1();
-#else
-		release_timer2();
-#endif
-		rv =  -1;
-	} else
-		pca_status.timer_on = 1;
-
-	splx(x);
-	return rv;
-}
-
-
-static void
-pca_stop(void)
-{
-	int x = splhigh();
-
-	/* release the timers */
-	release_timer0();
-#ifdef PC98
-	release_timer1();
-#else
-	release_timer2();
-#endif
-	/* reset the buffer */
-	pca_status.in_use[0] = pca_status.in_use[1] = pca_status.in_use[2] = 0;
-	pca_status.index = 0;
-	pca_status.counter = 0;
-	pca_status.current = 0;
-	pca_status.buffer = pca_status.buf[pca_status.current];
-	pca_status.timer_on = 0;
-	splx(x);
-}
-
-
-static void
-pca_pause(void)
-{
-	int x = splhigh();
-
-	release_timer0();
-#ifdef PC98
-	release_timer1();
-#else
-	release_timer2();
-#endif
-	pca_status.timer_on = 0;
-	splx(x);
-}
-
-
-static void
-pca_continue(void)
-{
-	int x = splhigh();
-
-#ifdef PC98
-	pca_status.oldval = inb(IO_PPI) & ~0x08;
-	acquire_timer1(TIMER_LSB|TIMER_ONESHOT);
-#else
-        pca_status.oldval = inb(IO_PPI) | 0x03;
-	acquire_timer2(TIMER_LSB|TIMER_ONESHOT);
-#endif
-	acquire_timer0(INTERRUPT_RATE, pcaintr);
-	pca_status.timer_on = 1;
-	splx(x);
-}
-
-
-static int
-pca_wait(void)
-{
-	int error, x;
-
-	if (!pca_status.timer_on)
-		return 0;
-
-	while (pca_status.in_use[0] || pca_status.in_use[1] ||
-	    pca_status.in_use[2]) {
-		x = spltty();
-		pca_sleep = 1;
-		error = tsleep(&pca_sleep, PZERO|PCATCH, "pca_drain", 0);
-		pca_sleep = 0;
-		splx(x);
-		if (error != 0 && error != ERESTART) {
-			pca_stop();
-			return error;
-		}
-        }
-        return 0;
-}
-
-
-static struct isa_pnp_id pca_ids[] = {
-	{0x0008d041, "AT-style speaker sound"},	/* PNP0800 */
-	{0}
-};
-
-static int
-pcaprobe(device_t dev)
-{
-	/* Check isapnp ids */
-	return ISA_PNP_PROBE(device_get_parent(dev), dev, pca_ids);
-}
-
-
-static int
-pcaattach(device_t dev)
-{
-	pca_init();
-	make_dev(&pca_cdevsw, 0, 0, 0, 0600, "pcaudio");
-	make_dev(&pca_cdevsw, 128, 0, 0, 0600, "pcaudioctl");
-	return 0;
-}
-
-static device_method_t pca_methods[] = {
-	DEVMETHOD(device_probe,		pcaprobe),
-	DEVMETHOD(device_attach,	pcaattach),
-	{ 0, 0 }
-};
-
-static driver_t pca_driver = {
-	"pca",
-	pca_methods,
-	1
-};
-
-static devclass_t pca_devclass;
-
-DRIVER_MODULE(pca, isa, pca_driver, pca_devclass, 0, 0);
-
-
-static int
-pcaopen(dev_t dev, int flags, int fmt, struct thread *td)
-{
-	/* audioctl device can always be opened */
-	if (minor(dev) == 128)
-		return 0;
-	if (minor(dev) > 0)
-		return ENXIO;
-
-	/* audio device can only be open by one process */
-	if (pca_status.open) {
-		pca_status.queries = 1;
-		return EBUSY;
-	}
-	pca_status.buffer = pca_status.buf[0];
-	pca_status.in_use[0] = pca_status.in_use[1] = pca_status.in_use[2] = 0;
-	pca_status.timer_on = 0;
-	pca_status.open = 1;
-	pca_status.processed = 0;
-	return 0;
-}
-
-
-static int
-pcaclose(dev_t dev, int flags, int fmt, struct thread *td)
-{
-	/* audioctl device can always be closed */
-	if (minor(dev) == 128)
-		return 0;
-	if (minor(dev) > 0)
-		return ENXIO;
-	/* audio device close drains all output and restores timers */
-	pca_wait();
-	pca_stop();
-	pca_status.open = 0;
-	return 0;
-}
-
-
-static int
-pcawrite(dev_t dev, struct uio *uio, int flag)
-{
-	int count, error, which, x;
-
-	/* only audio device can be written */
-	if (minor(dev) > 0)
-		return ENXIO;
-
-	while ((count = min(BUF_SIZE, uio->uio_resid)) > 0) {
-		if (pca_status.in_use[0] && pca_status.in_use[1] &&
-		    pca_status.in_use[2]) {
-			if (flag & IO_NDELAY)
-				return EWOULDBLOCK;
-			x = spltty();
-			pca_sleep = 1;
-			error = tsleep(&pca_sleep, PZERO|PCATCH, "pca_wait", 0);
-			pca_sleep = 0;
-			splx(x);
-			if (error != 0 && error != ERESTART) {
-				pca_stop();
-				return error;
-			}
-		}
-		if (!pca_status.in_use[0])
-			which = 0;
-		else if (!pca_status.in_use[1])
-			which = 1;
-		else
-			which = 2;
-		if (count && !pca_status.in_use[which]) {
-			uiomove(pca_status.buf[which], count, uio);
-			pca_status.processed += count;
-			switch (pca_status.encoding) {
-			case AUDIO_ENCODING_ULAW:
-				conv(ulaw_dsp, pca_status.buf[which], count);
-				break;
-
-			case AUDIO_ENCODING_ALAW:
-				conv(alaw_linear, pca_status.buf[which], count);
-				break;
-
-			case AUDIO_ENCODING_RAW:
-				break;
-			}
-			pca_status.in_use[which] = count;
-			if (!pca_status.timer_on)
-				if (pca_start())
-					return EBUSY;
-		}
-	}
-	return 0;
-}
-
-
-static int
-pcaioctl(dev_t dev, u_long cmd, caddr_t data, int flag, struct thread *td)
-{
-	audio_info_t *auptr;
-
-	switch(cmd) {
-
-	case AUDIO_GETINFO:
-		auptr = (audio_info_t *)data;
-		auptr->play.sample_rate = pca_status.sample_rate;
-		auptr->play.channels = 1;
-		auptr->play.precision = 8;
-		auptr->play.encoding = pca_status.encoding;
-
-		auptr->play.gain = pca_status.volume;
-		auptr->play.port = 0;
-
-		auptr->play.samples = pca_status.processed;
-		auptr->play.eof = 0;
-		auptr->play.pause = !pca_status.timer_on;
-		auptr->play.error = 0;
-		auptr->play.waiting = pca_status.queries;
-
-		auptr->play.open = pca_status.open;
-		auptr->play.active = pca_status.timer_on;
-		return 0;
-
-	case AUDIO_SETINFO:
-		auptr = (audio_info_t *)data;
-		if (auptr->play.sample_rate != (unsigned int)~0) {
-			pca_status.sample_rate = auptr->play.sample_rate;
-			pca_status.scale =
-				(pca_status.sample_rate << 8) / INTERRUPT_RATE;
-		}
-		if (auptr->play.encoding != (unsigned int)~0) {
-			pca_status.encoding = auptr->play.encoding;
-		}
-		if (auptr->play.gain != (unsigned int)~0) {
-			pca_status.volume = auptr->play.gain;
-			pca_volume(pca_status.volume);
-		}
-		if (auptr->play.pause != (unsigned char)~0) {
-			if (auptr->play.pause)
-				pca_pause();
-			else
-				pca_continue();
-		}
-
-		return 0;
-
-	case AUDIO_DRAIN:
-	case AUDIO_COMPAT_DRAIN:
-		return pca_wait();
-
-	case AUDIO_FLUSH:
-	case AUDIO_COMPAT_FLUSH:
-		pca_stop();
-		return 0;
-	case FIONBIO:
-		return 0;
-	}
-	return ENXIO;
-}
-
-
-static void
-pcaintr(struct clockframe *frame)
-{
-	if (pca_status.index < pca_status.in_use[pca_status.current]) {
-		disable_intr();
-#ifdef PC98
-		__asm__("outb %0,$0x35\n"
-			"orb $0x08,%0\n"
-			"outb %0,$0x35"
-#else
-		__asm__("outb %0,$0x61\n"
-			"andb $0xFE,%0\n"
-			"outb %0,$0x61"
-#endif
-			: : "a" ((char)pca_status.oldval) );
-		__asm__("xlatb\n"
-#ifdef PC98
-			"outb %0,%%dx"
-			: : "a" ((char)pca_status.buffer[pca_status.index]),
-			    "b" (volume_table),
-			    "d" ((u_short)0x3fdb) );
-#else
-			"outb %0,$0x42"
-			: : "a" ((char)pca_status.buffer[pca_status.index]),
-			    "b" (volume_table) );
-#endif
-		enable_intr();
-		pca_status.counter += pca_status.scale;
-		pca_status.index = (pca_status.counter >> 8);
-	}
-	if (pca_status.index >= pca_status.in_use[pca_status.current]) {
-		pca_status.index = pca_status.counter = 0;
-		pca_status.in_use[pca_status.current] = 0;
-		pca_status.current++;
- 		if (pca_status.current > 2)
- 			pca_status.current = 0;
-		pca_status.buffer = pca_status.buf[pca_status.current];
-		if (pca_sleep)
-			wakeup(&pca_sleep);
-		if (SEL_WAITING(&pca_status.wsel))
-			selwakeup(&pca_status.wsel);
-	}
-}
-
-
-static int
-pcapoll(dev_t dev, int events, struct thread *td)
-{
- 	int s;
-	int revents = 0;
-
- 	s = spltty();
-
-	if (events & (POLLOUT | POLLWRNORM)) {
- 		if (!pca_status.in_use[0] || !pca_status.in_use[1] ||
- 		    !pca_status.in_use[2])
- 			revents |= events & (POLLOUT | POLLWRNORM);
- 		else
-			selrecord(td, &pca_status.wsel);
-	}
-	splx(s);
-	return (revents);
-}