Driver for Cirrus Logic CS4281 sound chips. Originally written for NetBSD by

Tatoku Ogaito, banged into shape for OpenBSD by me. Recording has not been
tested yet, but mpg123 works fine. Sound still works after suspend/resume.

XXX: On the IBM ThinkPad X20, must disable pcibios else the cs4281 won't
generate interrupts. Cause yet unknown but probably not the driver's fault.
YMMV on other laptops with this chip.

4 files changed, 1911 insertions, 2 deletions

diff --git a/sys/arch/i386/conf/GENERIC b/sys/arch/i386/conf/GENERIC
index 5c62ca13a4c..3091e43a01c 100644
--- a/sys/arch/i386/conf/GENERIC
+++ b/sys/arch/i386/conf/GENERIC
@@ -1,4 +1,4 @@
-#	$OpenBSD: GENERIC,v 1.220 2001/01/11 23:38:57 espie Exp $
+#	$OpenBSD: GENERIC,v 1.221 2001/01/13 19:53:50 aaron Exp $
 #	$NetBSD: GENERIC,v 1.48 1996/05/20 18:17:23 mrg Exp $
 #
 #	GENERIC -- everything that's currently supported
@@ -344,6 +344,7 @@ neo*	at pci? dev ? function ?		# NeoMagic 256AV/ZX
 cmpci*	at pci? dev ? function ?		# C-Media CMI8338/8738
 auich*	at pci? dev ? function ?		# i82801 ICH AC'97 audio
 clcs*	at pci? dev ? function ?		# CS4280 CrystalClear audio
+clct*	at pci? dev ? function ?		# CS4281 CrystalClear audio
 fms*	at pci? dev ? function ?		# Forte Media FM801
 auvia*	at pci? dev ? function ?		# VIA VT82C686A
 maestro* at pci? dev ? function ?		# ESS Maestro PCI
@@ -387,6 +388,7 @@ audio*  at sv?
 audio*	at neo?
 audio*	at cmpci?
 audio*	at clcs?
+audio*	at clct?
 audio*	at auich?
 audio*	at fms?
 audio*	at auvia?
diff --git a/sys/dev/pci/cs4281.c b/sys/dev/pci/cs4281.c
new file mode 100644
index 00000000000..273df86deec
--- /dev/null
+++ b/sys/dev/pci/cs4281.c
@@ -0,0 +1,1579 @@
+/*	$OpenBSD: cs4281.c,v 1.1 2001/01/13 19:53:50 aaron Exp $ */
+/*	$Tera: cs4281.c,v 1.18 2000/12/27 14:24:45 tacha Exp $	*/
+
+/*
+ * Copyright (c) 2000 Tatoku Ogaito.  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.
+ * 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. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *      This product includes software developed by Tatoku Ogaito
+ *	for the NetBSD Project.
+ * 4. 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.
+ */
+
+/*
+ * Cirrus Logic CS4281 driver.
+ * Data sheets can be found
+ * http://www.cirrus.com/ftp/pub/4281.pdf
+ * ftp://ftp.alsa-project.org/pub/manuals/cirrus/cs4281tm.pdf
+ *
+ * TODO:
+ *   1: midi and FM support
+ */
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/kernel.h>
+#include <sys/malloc.h>
+#include <sys/fcntl.h>
+#include <sys/device.h>
+#include <sys/types.h>
+#include <sys/systm.h>
+
+#include <dev/pci/pcidevs.h>
+#include <dev/pci/pcivar.h>
+#include <dev/pci/cs4281reg.h>
+
+#include <sys/audioio.h>
+#include <dev/audio_if.h>
+#include <dev/midi_if.h>
+#include <dev/mulaw.h>
+#include <dev/auconv.h>
+
+#include <dev/ic/ac97.h>
+
+#include <machine/bus.h>
+
+#define CSCC_PCI_BA0 0x10
+#define CSCC_PCI_BA1 0x14
+
+struct cs4281_dma {
+	bus_dmamap_t map;
+	caddr_t addr;		/* real dma buffer */
+	caddr_t dum;		/* dummy buffer for audio driver */
+	bus_dma_segment_t segs[1];
+	int nsegs;
+	size_t size;
+	struct cs4281_dma *next;
+};
+#define DMAADDR(p) ((p)->map->dm_segs[0].ds_addr)
+#define BUFADDR(p)  ((void *)((p)->dum))
+#define KERNADDR(p) ((void *)((p)->addr))
+
+/*
+ * Software state
+ */
+struct cs4281_softc {
+	struct device		sc_dev;
+
+	pci_intr_handle_t	*sc_ih;
+
+        /* I/O (BA0) */
+	bus_space_tag_t		ba0t;
+	bus_space_handle_t	ba0h;
+
+	/* BA1 */
+	bus_space_tag_t		ba1t;
+	bus_space_handle_t	ba1h;
+
+	/* DMA */
+	bus_dma_tag_t		sc_dmatag;
+	struct cs4281_dma	*sc_dmas;
+	size_t dma_size;
+	size_t dma_align;
+
+	int	hw_blocksize;
+
+        /* playback */
+	void	(*sc_pintr)(void *);	/* dma completion intr handler */
+	void	*sc_parg;		/* arg for sc_intr() */
+	char	*sc_ps, *sc_pe, *sc_pn;
+	int	sc_pcount;
+	int	sc_pi;
+	struct cs4281_dma *sc_pdma;
+	char	*sc_pbuf;
+	int	(*halt_output)__P((void *));
+#ifdef DIAGNOSTIC
+        char	sc_prun;
+#endif
+
+	/* capturing */
+	void	(*sc_rintr)(void *);	/* dma completion intr handler */
+	void	*sc_rarg;		/* arg for sc_intr() */
+	char	*sc_rs, *sc_re, *sc_rn;
+	int	sc_rcount;
+	int	sc_ri;
+	struct	cs4281_dma *sc_rdma;
+	char	*sc_rbuf;
+	int	sc_rparam;		/* record format */
+	int	(*halt_input)__P((void *));
+#ifdef DIAGNOSTIC
+        char	sc_rrun;
+#endif
+
+#if NMIDI > 0
+        void	(*sc_iintr)(void *, int);	/* midi input ready handler */
+        void	(*sc_ointr)(void *);		/* midi output ready handler */
+        void	*sc_arg;
+#endif
+
+	/* AC97 CODEC */
+	struct ac97_codec_if *codec_if;
+	struct ac97_host_if host_if;
+
+        /* Power Management */
+        char	sc_suspend;
+        void	*sc_powerhook;		/* Power hook */
+	u_int16_t ac97_reg[CS4281_SAVE_REG_MAX + 1];   /* Save ac97 registers */
+};
+
+#define BA0READ4(sc, r) bus_space_read_4((sc)->ba0t, (sc)->ba0h, (r))
+#define BA0WRITE4(sc, r, x) bus_space_write_4((sc)->ba0t, (sc)->ba0h, (r), (x))
+
+#if defined(ENABLE_SECONDARY_CODEC)
+#define MAX_CHANNELS  (4)
+#define MAX_FIFO_SIZE 32 /* 128/4 channels */
+#else
+#define MAX_CHANNELS  (2)
+#define MAX_FIFO_SIZE 64 /* 128/2 channels */
+#endif
+
+int cs4281_match		__P((struct device *, void *, void *));
+void cs4281_attach		__P((struct device *, struct device *, void *));
+int cs4281_intr			__P((void *));
+int cs4281_query_encoding	__P((void *, struct audio_encoding *));
+int cs4281_set_params		__P((void *, int, int, struct audio_params *,
+				     struct audio_params *));
+int cs4281_halt_output		__P((void *));
+int cs4281_halt_input		__P((void *));
+int cs4281_getdev		__P((void *, struct audio_device *));
+int cs4281_trigger_output	__P((void *, void *, void *, int,
+				     void (*)(void *), void *,
+				     struct audio_params *));
+int cs4281_trigger_input	__P((void *, void *, void *, int,
+				     void (*)(void *), void *,
+				     struct audio_params *));
+
+u_int8_t cs4281_sr2regval	__P((int));
+void cs4281_set_dac_rate	__P((struct cs4281_softc *, int));
+void cs4281_set_adc_rate	__P((struct cs4281_softc *, int));
+int cs4281_init			__P((struct cs4281_softc *));
+
+int cs4281_open			__P((void *, int));
+void cs4281_close		__P((void *));
+int cs4281_round_blocksize	__P((void *, int));
+int cs4281_get_props		__P((void *));
+int cs4281_attach_codec		__P((void *, struct ac97_codec_if *));
+int cs4281_read_codec		__P((void *, u_int8_t , u_int16_t *));
+int cs4281_write_codec		__P((void *, u_int8_t, u_int16_t));
+void cs4281_reset_codec		__P((void *));
+
+void cs4281_power		__P((int, void *));
+
+int cs4281_mixer_set_port	__P((void *, mixer_ctrl_t *));
+int cs4281_mixer_get_port	__P((void *, mixer_ctrl_t *));
+int cs4281_query_devinfo	__P((void *, mixer_devinfo_t *));
+void *cs4281_malloc		__P((void *, u_long, int, int));
+u_long cs4281_round_buffersize	__P((void *, u_long));
+void cs4281_free		__P((void *, void *, int));
+int cs4281_mappage		__P((void *, void *, int, int));
+
+int cs4281_allocmem		__P((struct cs4281_softc *, size_t, int, int,
+				     struct cs4281_dma *));
+int cs4281_src_wait		__P((struct cs4281_softc *));
+
+#if defined(CS4281_DEBUG)
+#undef DPRINTF
+#undef DPRINTFN
+#define DPRINTF(x)	    if (cs4281_debug) printf x
+#define DPRINTFN(n,x)	    if (cs4281_debug>(n)) printf x
+int cs4281_debug = 5;
+#else
+#define DPRINTF(x)
+#define DPRINTFN(n,x)
+#endif
+
+struct audio_hw_if cs4281_hw_if = {
+	cs4281_open,
+	cs4281_close,
+	NULL,
+	cs4281_query_encoding,
+	cs4281_set_params,
+	cs4281_round_blocksize,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	cs4281_halt_output,
+	cs4281_halt_input,
+	NULL,
+	cs4281_getdev,
+	NULL,
+	cs4281_mixer_set_port,
+	cs4281_mixer_get_port,
+	cs4281_query_devinfo,
+	cs4281_malloc,
+	cs4281_free,
+	cs4281_round_buffersize,
+	NULL, /* cs4281_mappage, */
+	cs4281_get_props,
+	cs4281_trigger_output,
+	cs4281_trigger_input,
+};
+
+#if NMIDI > 0
+/* Midi Interface */
+void cs4281_midi_close		__P((void *));
+void cs4281_midi_getinfo	__P((void *, struct midi_info *));
+int cs4281_midi_open		__P((void *, int, void (*)(void *, int),
+				     void (*)(void *), void *));
+int cs4281_midi_output		__P((void *, int));
+
+struct midi_hw_if cs4281_midi_hw_if = {
+	cs4281_midi_open,
+	cs4281_midi_close,
+	cs4281_midi_output,
+	cs4281_midi_getinfo,
+	0,
+};
+#endif
+
+struct cfattach clct_ca = {
+	sizeof(struct cs4281_softc), cs4281_match, cs4281_attach
+};
+
+struct cfdriver clct_cd = {
+	NULL, "clct", DV_DULL
+};
+
+struct audio_device cs4281_device = {
+	"CS4281",
+	"",
+	"cs4281"
+};
+
+
+int
+cs4281_match(parent, match, aux)
+	struct device *parent;
+	void *match;
+	void *aux;
+{
+	struct pci_attach_args *pa = (struct pci_attach_args *)aux;
+	
+	if (PCI_VENDOR(pa->pa_id) != PCI_VENDOR_CIRRUS ||
+	    PCI_PRODUCT(pa->pa_id) != PCI_PRODUCT_CIRRUS_CS4281)
+		return (0);
+
+	return (1);
+}
+
+void
+cs4281_attach(parent, self, aux)
+	struct device *parent;
+	struct device *self;
+	void *aux;
+{
+	struct cs4281_softc *sc = (struct cs4281_softc *)self;
+	struct pci_attach_args *pa = (struct pci_attach_args *)aux;
+	pci_chipset_tag_t pc = pa->pa_pc;
+	char const *intrstr;
+	pci_intr_handle_t ih;
+	pcireg_t csr;
+
+	/* Map I/O register */
+	if (pci_mapreg_map(pa, CSCC_PCI_BA0,
+	    PCI_MAPREG_TYPE_MEM|PCI_MAPREG_MEM_TYPE_32BIT, 0, &sc->ba0t,
+	    &sc->ba0h, NULL, NULL)) {
+		printf("%s: can't map BA0 space\n", sc->sc_dev.dv_xname);
+		return;
+	}
+	if (pci_mapreg_map(pa, CSCC_PCI_BA1,
+	    PCI_MAPREG_TYPE_MEM|PCI_MAPREG_MEM_TYPE_32BIT, 0, &sc->ba1t,
+	    &sc->ba1h, NULL, NULL)) {
+		printf("%s: can't map BA1 space\n", sc->sc_dev.dv_xname);
+		return;
+	}
+
+	sc->sc_dmatag = pa->pa_dmat;
+
+	/* Enable the device (set bus master flag) */
+	csr = pci_conf_read(pa->pa_pc, pa->pa_tag, PCI_COMMAND_STATUS_REG);
+	pci_conf_write(pa->pa_pc, pa->pa_tag, PCI_COMMAND_STATUS_REG,
+	    csr | PCI_COMMAND_MASTER_ENABLE);
+
+	/* Map and establish the interrupt. */
+	if (pci_intr_map(pc, pa->pa_intrtag, pa->pa_intrpin, pa->pa_intrline,
+	    &ih)) {
+		printf("%s: couldn't map interrupt\n", sc->sc_dev.dv_xname);
+		return;
+	}
+	intrstr = pci_intr_string(pc, ih);
+
+	sc->sc_ih = pci_intr_establish(pc, ih, IPL_AUDIO, cs4281_intr, sc,
+	    sc->sc_dev.dv_xname);
+	if (sc->sc_ih == NULL) {
+		printf("%s: couldn't establish interrupt",sc->sc_dev.dv_xname);
+		if (intrstr != NULL)
+			printf(" at %s", intrstr);
+		printf("\n");
+		return;
+	}
+	printf(" %s\n", intrstr);
+
+	/*
+	 * Sound System start-up
+	 */
+	if (cs4281_init(sc) != 0)
+		return;
+
+	sc->halt_input  = cs4281_halt_input;
+	sc->halt_output = cs4281_halt_output;
+
+	sc->dma_size     = CS4281_BUFFER_SIZE / MAX_CHANNELS;
+	sc->dma_align    = 0x10;
+	sc->hw_blocksize = sc->dma_size / 2;
+	
+	/* AC 97 attachment */
+	sc->host_if.arg = sc;
+	sc->host_if.attach = cs4281_attach_codec;
+	sc->host_if.read   = cs4281_read_codec;
+	sc->host_if.write  = cs4281_write_codec;
+	sc->host_if.reset  = cs4281_reset_codec;
+	if (ac97_attach(&sc->host_if) != 0) {
+		printf("%s: ac97_attach failed\n", sc->sc_dev.dv_xname);
+		return;
+	}
+	audio_attach_mi(&cs4281_hw_if, sc, &sc->sc_dev);
+
+#if NMIDI > 0
+	midi_attach_mi(&cs4281_midi_hw_if, sc, &sc->sc_dev);
+#endif
+
+	sc->sc_suspend = PWR_RESUME;
+	sc->sc_powerhook = powerhook_establish(cs4281_power, sc);
+}
+
+
+int
+cs4281_intr(p)
+	void *p;
+{
+	struct cs4281_softc *sc = p;
+	u_int32_t intr, val;
+	char *empty_dma;
+	
+	intr = BA0READ4(sc, CS4281_HISR);
+	if (!(intr & (HISR_DMA0 | HISR_DMA1 | HISR_MIDI))) {
+		BA0WRITE4(sc, CS4281_HICR, HICR_IEV | HICR_CHGM);
+		return (0);
+	}
+	DPRINTF(("cs4281_intr:"));
+
+	if (intr & HISR_DMA0)
+		val = BA0READ4(sc, CS4281_HDSR0); /* clear intr condition */
+	if (intr & HISR_DMA1)
+		val = BA0READ4(sc, CS4281_HDSR1); /* clear intr condition */
+	BA0WRITE4(sc, CS4281_HICR, HICR_IEV | HICR_CHGM);
+
+	/* Playback Interrupt */
+	if (intr & HISR_DMA0) {
+		DPRINTF((" PB DMA 0x%x(%d)", (int)BA0READ4(sc, CS4281_DCA0),
+			 (int)BA0READ4(sc, CS4281_DCC0)));
+		if (sc->sc_pintr) {
+			if ((sc->sc_pi%sc->sc_pcount) == 0)
+				sc->sc_pintr(sc->sc_parg);
+		} else {
+			printf("unexpected play intr\n");
+		}
+		/* copy buffer */
+		++sc->sc_pi;
+		empty_dma = sc->sc_pdma->addr;
+		if (sc->sc_pi&1)
+			empty_dma += sc->hw_blocksize;
+		memcpy(empty_dma, sc->sc_pn, sc->hw_blocksize);
+		sc->sc_pn += sc->hw_blocksize;
+		if (sc->sc_pn >= sc->sc_pe)
+			sc->sc_pn = sc->sc_ps;
+	}
+	if (intr & HISR_DMA1) {
+		val = BA0READ4(sc, CS4281_HDSR1);
+		/* copy from dma */
+		DPRINTF((" CP DMA 0x%x(%d)", (int)BA0READ4(sc, CS4281_DCA1),
+			 (int)BA0READ4(sc, CS4281_DCC1)));
+		++sc->sc_ri;
+		empty_dma = sc->sc_rdma->addr;
+		if ((sc->sc_ri & 1) == 0)
+			empty_dma += sc->hw_blocksize;
+		memcpy(sc->sc_rn, empty_dma, sc->hw_blocksize);
+		if (sc->sc_rn >= sc->sc_re)
+			sc->sc_rn = sc->sc_rs;
+		if (sc->sc_rintr) {
+			if ((sc->sc_ri % sc->sc_rcount) == 0)
+				sc->sc_rintr(sc->sc_rarg);
+		} else {
+			printf("unexpected record intr\n");
+		}
+	}
+	DPRINTF(("\n"));
+	return (1);
+}
+
+int
+cs4281_query_encoding(addr, fp)
+	void *addr;
+	struct audio_encoding *fp;
+{
+	switch (fp->index) {
+	case 0:
+		strcpy(fp->name, AudioEulinear);
+		fp->encoding = AUDIO_ENCODING_ULINEAR;
+		fp->precision = 8;
+		fp->flags = 0;
+		break;
+	case 1:
+		strcpy(fp->name, AudioEmulaw);
+		fp->encoding = AUDIO_ENCODING_ULAW;
+		fp->precision = 8;
+		fp->flags = AUDIO_ENCODINGFLAG_EMULATED;
+		break;
+	case 2:
+		strcpy(fp->name, AudioEalaw);
+		fp->encoding = AUDIO_ENCODING_ALAW;
+		fp->precision = 8;
+		fp->flags = AUDIO_ENCODINGFLAG_EMULATED;
+		break;
+	case 3:
+		strcpy(fp->name, AudioEslinear);
+		fp->encoding = AUDIO_ENCODING_SLINEAR;
+		fp->precision = 8;
+		fp->flags = 0;
+		break;
+	case 4:
+		strcpy(fp->name, AudioEslinear_le);
+		fp->encoding = AUDIO_ENCODING_SLINEAR_LE;
+		fp->precision = 16;
+		fp->flags = 0;
+		break;
+	case 5:
+		strcpy(fp->name, AudioEulinear_le);
+		fp->encoding = AUDIO_ENCODING_ULINEAR_LE;
+		fp->precision = 16;
+		fp->flags = 0;
+		break;
+	case 6:
+		strcpy(fp->name, AudioEslinear_be);
+		fp->encoding = AUDIO_ENCODING_SLINEAR_BE;
+		fp->precision = 16;
+		fp->flags = 0;
+		break;
+	case 7:
+		strcpy(fp->name, AudioEulinear_be);
+		fp->encoding = AUDIO_ENCODING_ULINEAR_BE;
+		fp->precision = 16;
+		fp->flags = 0;
+		break;
+	default:
+		return EINVAL;
+	}
+	return (0);
+}
+
+int
+cs4281_set_params(addr, setmode, usemode, play, rec)
+	void *addr;
+	int setmode, usemode;
+	struct audio_params *play, *rec;
+{
+	struct cs4281_softc *sc = addr;
+	struct audio_params *p;
+	int mode;
+
+	for (mode = AUMODE_RECORD; mode != -1;
+	    mode = mode == AUMODE_RECORD ? AUMODE_PLAY : -1) {
+		if ((setmode & mode) == 0)
+			continue;
+		
+		p = mode == AUMODE_PLAY ? play : rec;
+		
+		if (p == play) {
+			DPRINTFN(5,("play: samp=%ld precision=%d channels=%d\n",
+				p->sample_rate, p->precision, p->channels));
+			if (p->sample_rate < 6023 || p->sample_rate > 48000 ||
+			    (p->precision != 8 && p->precision != 16) ||
+			    (p->channels != 1  && p->channels != 2)) {
+				return (EINVAL);
+			}
+		} else {
+			DPRINTFN(5,("rec: samp=%ld precision=%d channels=%d\n",
+				p->sample_rate, p->precision, p->channels));
+			if (p->sample_rate < 6023 || p->sample_rate > 48000 ||
+			    (p->precision != 8 && p->precision != 16) ||
+			    (p->channels != 1 && p->channels != 2)) {
+				return (EINVAL);
+			}
+		}
+		p->factor = 1;
+		p->sw_code = 0;
+
+		switch (p->encoding) {
+		case AUDIO_ENCODING_SLINEAR_BE:
+			break;
+		case AUDIO_ENCODING_SLINEAR_LE:
+			break;
+		case AUDIO_ENCODING_ULINEAR_BE:
+			break;
+		case AUDIO_ENCODING_ULINEAR_LE:
+			break;
+		case AUDIO_ENCODING_ULAW:
+			if (mode == AUMODE_PLAY) {
+				p->sw_code = mulaw_to_slinear8;
+			} else {
+				p->sw_code = slinear8_to_mulaw;
+			}
+			break;
+		case AUDIO_ENCODING_ALAW:
+			if (mode == AUMODE_PLAY) {
+				p->sw_code = alaw_to_slinear8;
+			} else {
+				p->sw_code = slinear8_to_alaw;
+			}
+			break;
+		default:
+			return (EINVAL);
+		}
+	}
+
+	/* set sample rate */
+	cs4281_set_dac_rate(sc, play->sample_rate);
+	cs4281_set_adc_rate(sc, rec->sample_rate);
+	return (0);
+}
+
+int
+cs4281_halt_output(addr)
+	void *addr;
+{
+	struct cs4281_softc *sc = addr;
+	
+	BA0WRITE4(sc, CS4281_DCR0, BA0READ4(sc, CS4281_DCR0) | DCRn_MSK);
+#ifdef DIAGNOSTIC
+	sc->sc_prun = 0;
+#endif
+	return (0);
+}
+
+int
+cs4281_halt_input(addr)
+	void *addr;
+{
+	struct cs4281_softc *sc = addr;
+
+	BA0WRITE4(sc, CS4281_DCR1, BA0READ4(sc, CS4281_DCR1) | DCRn_MSK);
+#ifdef DIAGNOSTIC
+	sc->sc_rrun = 0;
+#endif
+	return (0);
+}
+
+/* trivial */
+int
+cs4281_getdev(addr, retp)
+     void *addr;
+     struct audio_device *retp;
+{
+	*retp = cs4281_device;
+	return (0);
+}
+
+
+int
+cs4281_trigger_output(addr, start, end, blksize, intr, arg, param)
+	void *addr;
+	void *start, *end;
+	int blksize;
+	void (*intr) __P((void *));
+	void *arg;
+	struct audio_params *param;
+{
+	struct cs4281_softc *sc = addr;
+	u_int32_t fmt=0;
+	struct cs4281_dma *p;
+	int dma_count;
+
+#ifdef DIAGNOSTIC
+	if (sc->sc_prun)
+		printf("cs4281_trigger_output: already running\n");
+	sc->sc_prun = 1;
+#endif
+
+	DPRINTF(("cs4281_trigger_output: sc=%p start=%p end=%p "
+		 "blksize=%d intr=%p(%p)\n", addr, start, end, blksize, intr, arg));
+	sc->sc_pintr = intr;
+	sc->sc_parg  = arg;
+
+	/* stop playback DMA */
+	BA0WRITE4(sc, CS4281_DCR0, BA0READ4(sc, CS4281_DCR0) | DCRn_MSK);
+
+	DPRINTF(("param: precision=%d  factor=%d channels=%d encoding=%d\n",
+	       param->precision, param->factor, param->channels,
+	       param->encoding));
+	for (p = sc->sc_dmas; p != NULL && BUFADDR(p) != start; p = p->next)
+		;
+	if (p == NULL) {
+		printf("cs4281_trigger_output: bad addr %p\n", start);
+		return (EINVAL);
+	}
+
+	sc->sc_pcount = blksize / sc->hw_blocksize;
+	sc->sc_ps = (char *)start;
+	sc->sc_pe = (char *)end;
+	sc->sc_pdma = p;
+	sc->sc_pbuf = KERNADDR(p);
+	sc->sc_pi = 0;
+	sc->sc_pn = sc->sc_ps;
+	if (blksize >= sc->dma_size) {
+		sc->sc_pn = sc->sc_ps + sc->dma_size;
+		memcpy(sc->sc_pbuf, start, sc->dma_size);
+		++sc->sc_pi;
+	} else {
+		sc->sc_pn = sc->sc_ps + sc->hw_blocksize;
+		memcpy(sc->sc_pbuf, start, sc->hw_blocksize);
+	}
+
+	dma_count = sc->dma_size;
+	if (param->precision * param->factor != 8)
+		dma_count /= 2;   /* 16 bit */
+	if (param->channels > 1)
+		dma_count /= 2;   /* Stereo */
+
+	DPRINTF(("cs4281_trigger_output: DMAADDR(p)=0x%x count=%d\n",
+		 (int)DMAADDR(p), dma_count));
+	BA0WRITE4(sc, CS4281_DBA0, DMAADDR(p));
+	BA0WRITE4(sc, CS4281_DBC0, dma_count-1);
+
+	/* set playback format */
+	fmt = BA0READ4(sc, CS4281_DMR0) & ~DMRn_FMTMSK;
+	if (param->precision * param->factor == 8)
+		fmt |= DMRn_SIZE8;
+	if (param->channels == 1)
+		fmt |= DMRn_MONO;
+	if (param->encoding == AUDIO_ENCODING_ULINEAR_BE ||
+	    param->encoding == AUDIO_ENCODING_SLINEAR_BE)
+		fmt |= DMRn_BEND;
+	if (param->encoding == AUDIO_ENCODING_ULINEAR_BE ||
+	    param->encoding == AUDIO_ENCODING_ULINEAR_LE)
+		fmt |= DMRn_USIGN;
+	BA0WRITE4(sc, CS4281_DMR0, fmt);
+
+	/* set sample rate */
+	cs4281_set_dac_rate(sc, param->sample_rate);
+
+	/* start DMA */
+	BA0WRITE4(sc, CS4281_DCR0, BA0READ4(sc, CS4281_DCR0) & ~DCRn_MSK);
+	/* Enable interrupts */
+	BA0WRITE4(sc, CS4281_HICR, HICR_IEV | HICR_CHGM);
+
+	BA0WRITE4(sc, CS4281_PPRVC, 7);
+	BA0WRITE4(sc, CS4281_PPLVC, 7);
+
+	DPRINTF(("HICR =0x%08x(expected 0x00000001)\n", BA0READ4(sc, CS4281_HICR)));
+	DPRINTF(("HIMR =0x%08x(expected 0x00f0fc3f)\n", BA0READ4(sc, CS4281_HIMR)));
+	DPRINTF(("DMR0 =0x%08x(expected 0x2???0018)\n", BA0READ4(sc, CS4281_DMR0)));
+	DPRINTF(("DCR0 =0x%08x(expected 0x00030000)\n", BA0READ4(sc, CS4281_DCR0)));
+	DPRINTF(("FCR0 =0x%08x(expected 0x81000f00)\n", BA0READ4(sc, CS4281_FCR0)));
+	DPRINTF(("DACSR=0x%08x(expected 1 for 44kHz 5 for 8kHz)\n",
+		 BA0READ4(sc, CS4281_DACSR)));
+	DPRINTF(("SRCSA=0x%08x(expected 0x0b0a0100)\n", BA0READ4(sc, CS4281_SRCSA)));
+	DPRINTF(("SSPM&SSPM_PSRCEN =0x%08x(expected 0x00000010)\n",
+		 BA0READ4(sc, CS4281_SSPM) & SSPM_PSRCEN));
+
+	return (0);
+}
+
+int
+cs4281_trigger_input(addr, start, end, blksize, intr, arg, param)
+	void *addr;
+	void *start, *end;
+	int blksize;
+	void (*intr) __P((void *));
+	void *arg;
+	struct audio_params *param;
+{
+	struct cs4281_softc *sc = addr;
+	struct cs4281_dma *p;
+	u_int32_t fmt=0;
+	int dma_count;
+
+	printf("cs4281_trigger_input: not implemented yet\n");
+#ifdef DIAGNOSTIC
+	if (sc->sc_rrun)
+		printf("cs4281_trigger_input: already running\n");
+	sc->sc_rrun = 1;
+#endif
+	DPRINTF(("cs4281_trigger_input: sc=%p start=%p end=%p "
+	    "blksize=%d intr=%p(%p)\n", addr, start, end, blksize, intr, arg));
+	sc->sc_rintr = intr;
+	sc->sc_rarg  = arg;
+
+	/* stop recording DMA */
+	BA0WRITE4(sc, CS4281_DCR1, BA0READ4(sc, CS4281_DCR1) | DCRn_MSK);
+
+	for (p = sc->sc_dmas; p && BUFADDR(p) != start; p = p->next)
+		;
+	if (!p) {
+		printf("cs4281_trigger_input: bad addr %p\n", start);
+		return (EINVAL);
+	}
+
+	sc->sc_rcount = blksize / sc->hw_blocksize;
+	sc->sc_rs = (char *)start;
+	sc->sc_re = (char *)end;
+	sc->sc_rdma = p;
+	sc->sc_rbuf = KERNADDR(p);
+	sc->sc_ri = 0;
+	sc->sc_rn = sc->sc_rs;
+
+	dma_count = sc->dma_size;
+	if (param->precision * param->factor == 8)
+		dma_count /= 2;
+	if (param->channels > 1)
+		dma_count /= 2;
+
+	DPRINTF(("cs4281_trigger_input: DMAADDR(p)=0x%x count=%d\n",
+		 (int)DMAADDR(p), dma_count));
+	BA0WRITE4(sc, CS4281_DBA1, DMAADDR(p));
+	BA0WRITE4(sc, CS4281_DBC1, dma_count-1);
+
+	/* set recording format */
+	fmt = BA0READ4(sc, CS4281_DMR1) & ~DMRn_FMTMSK;
+	if (param->precision * param->factor == 8)
+		fmt |= DMRn_SIZE8;
+	if (param->channels == 1)
+		fmt |= DMRn_MONO;
+	if (param->encoding == AUDIO_ENCODING_ULINEAR_BE ||
+	    param->encoding == AUDIO_ENCODING_SLINEAR_BE)
+		fmt |= DMRn_BEND;
+	if (param->encoding == AUDIO_ENCODING_ULINEAR_BE ||
+	    param->encoding == AUDIO_ENCODING_ULINEAR_LE)
+		fmt |= DMRn_USIGN;
+	BA0WRITE4(sc, CS4281_DMR1, fmt);
+
+	/* set sample rate */
+	cs4281_set_adc_rate(sc, param->sample_rate);
+
+	/* Start DMA */
+	BA0WRITE4(sc, CS4281_DCR1, BA0READ4(sc, CS4281_DCR1) & ~DCRn_MSK);
+	/* Enable interrupts */
+	BA0WRITE4(sc, CS4281_HICR, HICR_IEV | HICR_CHGM);
+
+	DPRINTF(("HICR=0x%08x\n", BA0READ4(sc, CS4281_HICR)));
+	DPRINTF(("HIMR=0x%08x\n", BA0READ4(sc, CS4281_HIMR)));
+	DPRINTF(("DMR1=0x%08x\n", BA0READ4(sc, CS4281_DMR1)));
+	DPRINTF(("DCR1=0x%08x\n", BA0READ4(sc, CS4281_DCR1)));
+
+	return (0);
+}
+
+/* convert sample rate to register value */
+u_int8_t
+cs4281_sr2regval(rate)
+     int rate;
+{
+	u_int8_t retval;
+
+	/* We don't have to change here. but anyway ... */
+	if (rate > 48000)
+		rate = 48000;
+	if (rate < 6023)
+		rate = 6023;
+
+	switch (rate) {
+	case 8000:
+		retval = 5;
+		break;
+	case 11025:
+		retval = 4;
+		break;
+	case 16000:
+		retval = 3;
+		break;
+	case 22050:
+		retval = 2;
+		break;
+	case 44100:
+		retval = 1;
+		break;
+	case 48000:
+		retval = 0;
+		break;
+	default:
+		retval = 1536000/rate; /* == 24576000/(rate*16) */
+	}
+	return (retval);
+}
+
+	
+void
+cs4281_set_dac_rate(sc, rate)
+	struct cs4281_softc *sc;
+	int rate;
+{
+	BA0WRITE4(sc, CS4281_DACSR, cs4281_sr2regval(rate));
+}
+
+void
+cs4281_set_adc_rate(sc, rate)
+	struct cs4281_softc *sc;
+	int rate;
+{
+	BA0WRITE4(sc, CS4281_ADCSR, cs4281_sr2regval(rate));
+}
+
+int
+cs4281_init(sc)
+     struct cs4281_softc *sc;
+{
+	int n;
+	u_int16_t data;
+	u_int32_t dat32;
+
+	/* set "Configuration Write Protect" register to
+	 * 0x4281 to allow to write */
+	BA0WRITE4(sc, CS4281_CWPR, 0x4281);
+
+	/* Start PLL out in known state */
+	BA0WRITE4(sc, CS4281_CLKCR1, 0);
+	/* Start serial ports out in known state */
+	BA0WRITE4(sc, CS4281_SERMC, 0);
+	
+	/* Reset codec */
+	BA0WRITE4(sc, CS4281_ACCTL, 0);
+	delay(50);	/* delay 50us */
+
+	BA0WRITE4(sc, CS4281_SPMC, 0);
+	delay(100);	/* delay 100us */
+	BA0WRITE4(sc, CS4281_SPMC, SPMC_RSTN);
+#if defined(ENABLE_SECONDARY_CODEC)
+	BA0WRITE4(sc, CS4281_SPMC, SPMC_RSTN | SPCM_ASDIN2E);
+	BA0WRITE4(sc, CS4281_SERMC, SERMC_TCID);
+#endif
+	delay(50000);   /* XXX: delay 50ms */
+
+	/* Turn on Sound System clocks based on ABITCLK */
+	BA0WRITE4(sc, CS4281_CLKCR1, CLKCR1_DLLP);
+	delay(50000);   /* XXX: delay 50ms */
+	BA0WRITE4(sc, CS4281_CLKCR1, CLKCR1_SWCE | CLKCR1_DLLP);
+
+	/* Set enables for sections that are needed in the SSPM registers */
+	BA0WRITE4(sc, CS4281_SSPM,
+		  SSPM_MIXEN |		/* Mixer */
+		  SSPM_CSRCEN |		/* Capture SRC */
+		  SSPM_PSRCEN |		/* Playback SRC */
+		  SSPM_JSEN |		/* Joystick */
+		  SSPM_ACLEN |		/* AC LINK */
+		  SSPM_FMEN		/* FM */
+		  );
+
+	/* Wait for clock stabilization */
+	n = 0;
+	while ((BA0READ4(sc, CS4281_CLKCR1)& (CLKCR1_DLLRDY | CLKCR1_CLKON))
+	    != (CLKCR1_DLLRDY | CLKCR1_CLKON)) {
+		delay(100);
+		if (++n > 1000)
+			return (-1);
+	}
+
+	/* Enable ASYNC generation */
+	BA0WRITE4(sc, CS4281_ACCTL, ACCTL_ESYN);
+
+	/* Wait for Codec ready. Linux driver wait 50ms here */
+	n = 0;
+	while((BA0READ4(sc, CS4281_ACSTS) & ACSTS_CRDY) == 0) {
+		delay(100);
+		if (++n > 1000)
+			return (-1);
+	}
+
+#if defined(ENABLE_SECONDARY_CODEC)
+	/* secondary codec ready*/
+	n = 0;
+	while((BA0READ4(sc, CS4281_ACSTS2) & ACSTS2_CRDY2) == 0) {
+		delay(100);
+		if (++n > 1000)
+			return (-1);
+	}
+#endif
+
+	/* Set the serial timing configuration */
+	/* XXX: undocumented but the Linux driver do this */
+	BA0WRITE4(sc, CS4281_SERMC, SERMC_PTCAC97);
+	
+	/* Wait for Codec ready signal */
+	n = 0;
+	do {
+		delay(1000);
+		if (++n > 1000) {
+			printf("%s: Timeout waiting for Codec ready\n",
+			       sc->sc_dev.dv_xname);
+			return -1;
+		}
+		dat32 = BA0READ4(sc, CS4281_ACSTS) & ACSTS_CRDY;
+	} while (dat32 == 0);
+
+	/* Enable Valid Frame output on ASDOUT */
+	BA0WRITE4(sc, CS4281_ACCTL, ACCTL_ESYN | ACCTL_VFRM);
+	
+	/* Wait until Codec Calibration is finished. Codec register 26h */
+	n = 0;
+	do {
+		delay(1);
+		if (++n > 1000) {
+			printf("%s: Timeout waiting for Codec calibration\n",
+			       sc->sc_dev.dv_xname);
+			return -1;
+		}
+		cs4281_read_codec(sc, AC97_REG_POWER, &data);
+	} while ((data & 0x0f) != 0x0f);
+
+	/* Set the serial timing configuration again */
+	/* XXX: undocumented but the Linux driver do this */
+	BA0WRITE4(sc, CS4281_SERMC, SERMC_PTCAC97);
+
+	/* Wait until we've sampled input slots 3 & 4 as valid */
+	n = 0;
+	do {
+		delay(1000);
+		if (++n > 1000) {
+			printf("%s: Timeout waiting for sampled input slots as valid\n",
+			       sc->sc_dev.dv_xname);
+			return -1;
+		}
+		dat32 = BA0READ4(sc, CS4281_ACISV) & (ACISV_ISV3 | ACISV_ISV4);
+	} while (dat32 != (ACISV_ISV3 | ACISV_ISV4));
+	
+	/* Start digital data transfer of audio data to the codec */
+	BA0WRITE4(sc, CS4281_ACOSV, (ACOSV_SLV3 | ACOSV_SLV4));
+	
+	cs4281_write_codec(sc, AC97_REG_HEADPHONE_VOLUME, 0);
+	cs4281_write_codec(sc, AC97_REG_MASTER_VOLUME, 0);
+	
+	/* Power on the DAC */
+	cs4281_read_codec(sc, AC97_REG_POWER, &data);
+	cs4281_write_codec(sc, AC97_REG_POWER, data &= 0xfdff);
+
+	/* Wait until we sample a DAC ready state.
+	 * Not documented, but Linux driver does.
+	 */
+	for (n = 0; n < 32; ++n) {
+		delay(1000);
+		cs4281_read_codec(sc, AC97_REG_POWER, &data);
+		if (data & 0x02)
+			break;
+	}
+	
+	/* Power on the ADC */
+	cs4281_read_codec(sc, AC97_REG_POWER, &data);
+	cs4281_write_codec(sc, AC97_REG_POWER, data &= 0xfeff);
+
+	/* Wait until we sample ADC ready state.
+	 * Not documented, but Linux driver does.
+	 */
+	for (n = 0; n < 32; ++n) {
+		delay(1000);
+		cs4281_read_codec(sc, AC97_REG_POWER, &data);
+		if (data & 0x01)
+			break;
+	}
+	
+#if 0
+	/* Initialize SSCR register features */
+	/* XXX: hardware volume setting */
+	BA0WRITE4(sc, CS4281_SSCR, ~SSCR_HVC); /* disable HW volume setting */
+#endif
+
+	/* disable Sound Blaster Pro emulation */
+	/* XXX:
+	 * Cannot set since the documents does not describe which bit is
+	 * correspond to SSCR_SB. Since the reset value of SSCR is 0,
+	 * we can ignore it.*/
+#if 0
+	BA0WRITE4(sc, CS4281_SSCR, SSCR_SB);
+#endif
+
+	/* map AC97 PCM playback to DMA Channel 0 */
+	/* Reset FEN bit to setup first */
+	BA0WRITE4(sc, CS4281_FCR0, (BA0READ4(sc,CS4281_FCR0) & ~FCRn_FEN));
+	/*
+	 *| RS[4:0]/|        |
+	 *| LS[4:0] |  AC97  | Slot Function
+	 *|---------+--------+--------------------
+	 *|     0   |    3   | Left PCM Playback
+	 *|     1   |    4   | Right PCM Playback
+	 *|     2   |    5   | Phone Line 1 DAC
+	 *|     3   |    6   | Center PCM Playback
+	 *....
+	 *  quoted from Table 29(p109)
+	 */
+	dat32 = 0x01 << 24 |   /* RS[4:0] =  1 see above */
+		0x00 << 16 |   /* LS[4:0] =  0 see above */
+		0x0f <<  8 |   /* SZ[6:0] = 15 size of buffer */
+		0x00 <<  0 ;   /* OF[6:0] =  0 offset */
+	BA0WRITE4(sc, CS4281_FCR0, dat32);
+	BA0WRITE4(sc, CS4281_FCR0, dat32 | FCRn_FEN);
+
+	/* map AC97 PCM record to DMA Channel 1 */
+	/* Reset FEN bit to setup first */
+	BA0WRITE4(sc, CS4281_FCR1, (BA0READ4(sc,CS4281_FCR1) & ~FCRn_FEN));
+	/*
+	 *| RS[4:0]/|
+	 *| LS[4:0] | AC97 | Slot Function
+	 *|---------+------+-------------------
+	 *|   10    |   3  | Left PCM Record
+	 *|   11    |   4  | Right PCM Record
+	 *|   12    |   5  | Phone Line 1 ADC
+	 *|   13    |   6  | Mic ADC
+	 *....
+	 * quoted from Table 30(p109)
+	 */
+	dat32 = 0x0b << 24 |    /* RS[4:0] = 11 See above */
+		0x0a << 16 |    /* LS[4:0] = 10 See above */
+		0x0f <<  8 |    /* SZ[6:0] = 15 Size of buffer */
+		0x10 <<  0 ;    /* OF[6:0] = 16 offset */
+
+	/* XXX: I cannot understand why FCRn_PSH is needed here. */
+	BA0WRITE4(sc, CS4281_FCR1, dat32 | FCRn_PSH);
+	BA0WRITE4(sc, CS4281_FCR1, dat32 | FCRn_FEN);
+
+#if 0
+	/* Disable DMA Channel 2, 3 */
+	BA0WRITE4(sc, CS4281_FCR2, (BA0READ4(sc,CS4281_FCR2) & ~FCRn_FEN));
+	BA0WRITE4(sc, CS4281_FCR3, (BA0READ4(sc,CS4281_FCR3) & ~FCRn_FEN));
+#endif
+
+	/* Set the SRC Slot Assignment accordingly */
+	/*| PLSS[4:0]/
+	 *| PRSS[4:0] | AC97 | Slot Function
+	 *|-----------+------+----------------
+	 *|     0     |  3   | Left PCM Playback
+	 *|     1     |  4   | Right PCM Playback
+	 *|     2     |  5   | phone line 1 DAC
+	 *|     3     |  6   | Center PCM Playback
+	 *|     4     |  7   | Left Surround PCM Playback
+	 *|     5     |  8   | Right Surround PCM Playback
+	 *......
+	 *
+	 *| CLSS[4:0]/
+	 *| CRSS[4:0] | AC97 | Codec |Slot Function
+	 *|-----------+------+-------+-----------------
+	 *|    10     |   3  |Primary| Left PCM Record
+	 *|    11     |   4  |Primary| Right PCM Record
+	 *|    12     |   5  |Primary| Phone Line 1 ADC
+	 *|    13     |   6  |Primary| Mic ADC
+	 *|.....
+	 *|    20     |   3  |  Sec. | Left PCM Record
+	 *|    21     |   4  |  Sec. | Right PCM Record
+	 *|    22     |   5  |  Sec. | Phone Line 1 ADC
+	 *|    23     |   6  |  Sec. | Mic ADC
+	 */
+	dat32 = 0x0b << 24 |   /* CRSS[4:0] Right PCM Record(primary) */
+		0x0a << 16 |   /* CLSS[4:0] Left  PCM Record(primary) */
+		0x01 <<  8 |   /* PRSS[4:0] Right PCM Playback */
+		0x00 <<  0;    /* PLSS[4:0] Left  PCM Playback */
+	BA0WRITE4(sc, CS4281_SRCSA, dat32);
+	
+	/* Set interrupt to occured at Half and Full terminal
+	 * count interrupt enable for DMA channel 0 and 1.
+	 * To keep DMA stop, set MSK.
+	 */
+	dat32 = DCRn_HTCIE | DCRn_TCIE | DCRn_MSK;
+	BA0WRITE4(sc, CS4281_DCR0, dat32);
+	BA0WRITE4(sc, CS4281_DCR1, dat32);
+	
+	/* Set Auto-Initialize Contorl enable */
+	BA0WRITE4(sc, CS4281_DMR0,
+		  DMRn_DMA | DMRn_AUTO | DMRn_TR_READ);
+	BA0WRITE4(sc, CS4281_DMR1,
+		  DMRn_DMA | DMRn_AUTO | DMRn_TR_WRITE);
+
+	/* Clear DMA Mask in HIMR */
+	dat32 = BA0READ4(sc, CS4281_HIMR) & 0xfffbfcff;
+	BA0WRITE4(sc, CS4281_HIMR, dat32);
+	return (0);
+}
+
+void
+cs4281_power(why, v)
+	int why;
+	void *v;
+{
+	struct cs4281_softc *sc = (struct cs4281_softc *)v;
+	int i;
+
+	DPRINTF(("%s: cs4281_power why=%d\n", sc->sc_dev.dv_xname, why));
+	if (why != PWR_RESUME) {
+		sc->sc_suspend = why;
+
+		cs4281_halt_output(sc);
+		cs4281_halt_input(sc);
+		/* Save AC97 registers */
+		for (i = 1; i <= CS4281_SAVE_REG_MAX; i++) {
+			if (i == 0x04)	/* AC97_REG_MASTER_TONE */
+				continue;
+			cs4281_read_codec(sc, 2*i, &sc->ac97_reg[i>>1]);
+		}
+		/* should I powerdown here ? */
+		cs4281_write_codec(sc, AC97_REG_POWER, CS4281_POWER_DOWN_ALL);
+	} else {
+		if (sc->sc_suspend == PWR_RESUME) {
+			printf("cs4281_power: odd, resume without suspend.\n");
+			sc->sc_suspend = why;
+			return;
+		}
+		sc->sc_suspend = why;
+		cs4281_init(sc);
+		cs4281_reset_codec(sc);
+
+		/* restore ac97 registers */
+		for (i = 1; i <= CS4281_SAVE_REG_MAX; i++) {
+			if (i == 0x04)	/* AC97_REG_MASTER_TONE */
+				continue;
+			cs4281_write_codec(sc, 2*i, sc->ac97_reg[i>>1]);
+		}
+	}
+}
+
+void
+cs4281_reset_codec(void *addr)
+{
+	struct cs4281_softc *sc;
+	u_int16_t data;
+	u_int32_t dat32;
+	int n;
+
+	sc = addr;
+
+	DPRINTFN(3,("cs4281_reset_codec\n"));
+
+	/* Reset codec */
+	BA0WRITE4(sc, CS4281_ACCTL, 0);
+	delay(50);    /* delay 50us */
+
+	BA0WRITE4(sc, CS4281_SPMC, 0);
+	delay(100);	/* delay 100us */
+	BA0WRITE4(sc, CS4281_SPMC, SPMC_RSTN);
+#if defined(ENABLE_SECONDARY_CODEC)
+	BA0WRITE4(sc, CS4281_SPMC, SPMC_RSTN | SPCM_ASDIN2E);
+	BA0WRITE4(sc, CS4281_SERMC, SERMC_TCID);
+#endif
+	delay(50000);   /* XXX: delay 50ms */
+
+	/* Enable ASYNC generation */
+	BA0WRITE4(sc, CS4281_ACCTL, ACCTL_ESYN);
+
+	/* Wait for Codec ready. Linux driver wait 50ms here */
+	n = 0;
+	while((BA0READ4(sc, CS4281_ACSTS) & ACSTS_CRDY) == 0) {
+		delay(100);
+		if (++n > 1000) {
+			printf("reset_codec: AC97 codec ready timeout\n");
+			return;
+		}
+	}
+#if defined(ENABLE_SECONDARY_CODEC)
+	/* secondary codec ready*/
+	n = 0;
+	while((BA0READ4(sc, CS4281_ACSTS2) & ACSTS2_CRDY2) == 0) {
+		delay(100);
+		if (++n > 1000)
+			return;
+	}
+#endif
+	/* Set the serial timing configuration */
+	/* XXX: undocumented but the Linux driver do this */
+	BA0WRITE4(sc, CS4281_SERMC, SERMC_PTCAC97);
+	
+	/* Wait for Codec ready signal */
+	n = 0;
+	do {
+		delay(1000);
+		if (++n > 1000) {
+			printf("%s: Timeout waiting for Codec ready\n",
+			       sc->sc_dev.dv_xname);
+			return;
+		}
+		dat32 = BA0READ4(sc, CS4281_ACSTS) & ACSTS_CRDY;
+	} while (dat32 == 0);
+
+	/* Enable Valid Frame output on ASDOUT */
+	BA0WRITE4(sc, CS4281_ACCTL, ACCTL_ESYN | ACCTL_VFRM);
+	
+	/* Wait until Codec Calibration is finished. Codec register 26h */
+	n = 0;
+	do {
+		delay(1);
+		if (++n > 1000) {
+			printf("%s: Timeout waiting for Codec calibration\n",
+			       sc->sc_dev.dv_xname);
+			return ;
+		}
+		cs4281_read_codec(sc, AC97_REG_POWER, &data);
+	} while ((data & 0x0f) != 0x0f);
+
+	/* Set the serial timing configuration again */
+	/* XXX: undocumented but the Linux driver do this */
+	BA0WRITE4(sc, CS4281_SERMC, SERMC_PTCAC97);
+
+	/* Wait until we've sampled input slots 3 & 4 as valid */
+	n = 0;
+	do {
+		delay(1000);
+		if (++n > 1000) {
+			printf("%s: Timeout waiting for sampled input slots as valid\n",
+			       sc->sc_dev.dv_xname);
+			return;
+		}
+		dat32 = BA0READ4(sc, CS4281_ACISV) & (ACISV_ISV3 | ACISV_ISV4) ;
+	} while (dat32 != (ACISV_ISV3 | ACISV_ISV4));
+	
+	/* Start digital data transfer of audio data to the codec */
+	BA0WRITE4(sc, CS4281_ACOSV, (ACOSV_SLV3 | ACOSV_SLV4));
+}
+
+int
+cs4281_open(void *addr, int flags)
+{
+	return (0);
+}
+
+void
+cs4281_close(void *addr)
+{
+	struct cs4281_softc *sc;
+
+	sc = addr;
+
+	(*sc->halt_output)(sc);
+	(*sc->halt_input)(sc);
+	
+	sc->sc_pintr = 0;
+	sc->sc_rintr = 0;
+}
+
+int
+cs4281_round_blocksize(void *addr, int blk)
+{
+	struct cs4281_softc *sc;
+	int retval;
+	
+	DPRINTFN(5,("cs4281_round_blocksize blk=%d -> ", blk));
+	
+	sc=addr;
+	if (blk < sc->hw_blocksize)
+		retval = sc->hw_blocksize;
+	else
+		retval = blk & -(sc->hw_blocksize);
+
+	DPRINTFN(5,("%d\n", retval));
+
+	return (retval);
+}
+
+int
+cs4281_mixer_set_port(void *addr, mixer_ctrl_t *cp)
+{
+	struct cs4281_softc *sc;
+	int val;
+
+	sc = addr;
+	val = sc->codec_if->vtbl->mixer_set_port(sc->codec_if, cp);
+	DPRINTFN(3,("mixer_set_port: val=%d\n", val));
+	return (val);
+}
+
+int
+cs4281_mixer_get_port(void *addr, mixer_ctrl_t *cp)
+{
+	struct cs4281_softc *sc;
+
+	sc = addr;
+	return (sc->codec_if->vtbl->mixer_get_port(sc->codec_if, cp));
+}
+
+
+int
+cs4281_query_devinfo(void *addr, mixer_devinfo_t *dip)
+{
+	struct cs4281_softc *sc;
+
+	sc = addr;
+	return (sc->codec_if->vtbl->query_devinfo(sc->codec_if, dip));
+}
+
+void *
+cs4281_malloc(void *addr, u_long size, int pool, int flags)
+{
+	struct cs4281_softc *sc;
+	struct cs4281_dma   *p;
+	int error;
+
+	sc = addr;
+
+	p = malloc(sizeof(*p), pool, flags);
+	if (!p)
+		return (0);
+
+	error = cs4281_allocmem(sc, size, pool, flags, p);
+
+	if (error) {
+		free(p, pool);
+		return (0);
+	}
+
+	p->next = sc->sc_dmas;
+	sc->sc_dmas = p;
+	return (BUFADDR(p));
+}
+
+
+
+void
+cs4281_free(void *addr, void *ptr, int pool)
+{
+	struct cs4281_softc *sc;
+	struct cs4281_dma **pp, *p;
+
+	sc = addr;
+	for (pp = &sc->sc_dmas; (p = *pp) != NULL; pp = &p->next) {
+		if (BUFADDR(p) == ptr) {
+			bus_dmamap_unload(sc->sc_dmatag, p->map);
+			bus_dmamap_destroy(sc->sc_dmatag, p->map);
+			bus_dmamem_unmap(sc->sc_dmatag, p->addr, p->size);
+			bus_dmamem_free(sc->sc_dmatag, p->segs, p->nsegs);
+			free(p->dum, pool);
+			*pp = p->next;
+			free(p, pool);
+			return;
+		}
+	}
+}
+
+u_long
+cs4281_round_buffersize(void *addr, u_long size)
+{
+	/* The real dma buffersize are 4KB for CS4280
+	 * and 64kB/MAX_CHANNELS for CS4281.
+	 * But they are too small for high quality audio,
+	 * let the upper layer(audio) use a larger buffer.
+	 * (originally suggested by Lennart Augustsson.)
+	 */
+	return (size);
+}
+
+int
+cs4281_mappage(void *addr, void *mem, int off, int prot)
+{
+	struct cs4281_softc *sc;
+	struct cs4281_dma *p;
+	
+	sc = addr;
+	if (off < 0)
+		return -1;
+
+	for (p = sc->sc_dmas; p && BUFADDR(p) != mem; p = p->next)
+		;
+
+	if (!p) {
+		DPRINTF(("cs4281_mappage: bad buffer address\n"));
+		return (-1);
+	}
+
+	return (bus_dmamem_mmap(sc->sc_dmatag, p->segs, p->nsegs, off, prot,
+	    BUS_DMA_WAITOK));
+}
+
+
+int
+cs4281_get_props(void *addr)
+{
+	int retval;
+
+	retval = AUDIO_PROP_INDEPENDENT | AUDIO_PROP_FULLDUPLEX;
+#ifdef MMAP_READY
+	retval |= AUDIO_PROP_MMAP;
+#endif
+	return (retval);
+}
+
+/* AC97 */
+int
+cs4281_attach_codec(void *addr, struct ac97_codec_if *codec_if)
+{
+	struct cs4281_softc *sc;
+
+	DPRINTF(("cs4281_attach_codec:\n"));
+	sc = addr;
+	sc->codec_if = codec_if;
+	return (0);
+}
+
+
+int
+cs4281_read_codec(void *addr, u_int8_t ac97_addr, u_int16_t *ac97_data)
+{
+	struct cs4281_softc *sc;
+	u_int32_t acctl;
+	int n;
+
+	sc = addr;
+
+	DPRINTFN(5,("read_codec: add=0x%02x ", ac97_addr));
+	/*
+	 * Make sure that there is not data sitting around from a preivous
+	 * uncompleted access.
+	 */
+	BA0READ4(sc, CS4281_ACSDA);
+
+	/* Set up AC97 control registers. */
+	BA0WRITE4(sc, CS4281_ACCAD, ac97_addr);
+	BA0WRITE4(sc, CS4281_ACCDA, 0);
+
+	acctl = ACCTL_ESYN | ACCTL_VFRM | ACCTL_CRW  | ACCTL_DCV;
+	BA0WRITE4(sc, CS4281_ACCTL, acctl);
+
+	if (cs4281_src_wait(sc) < 0) {
+		printf("%s: AC97 read prob. (DCV!=0) for add=0x%0x\n",
+		       sc->sc_dev.dv_xname, ac97_addr);
+		return 1;
+	}
+
+	/* wait for valid status bit is active */
+	n = 0;
+	while ((BA0READ4(sc, CS4281_ACSTS) & ACSTS_VSTS) == 0) {
+		delay(1);
+		while (++n > 1000) {
+			printf("%s: AC97 read fail (VSTS==0) for add=0x%0x\n",
+			       sc->sc_dev.dv_xname, ac97_addr);
+			return 1;
+		}
+	}
+	*ac97_data = BA0READ4(sc, CS4281_ACSDA);
+	DPRINTFN(5,("data=0x%04x\n", *ac97_data));
+	return (0);
+}
+
+int
+cs4281_write_codec(void *addr, u_int8_t ac97_addr, u_int16_t ac97_data)
+{
+	struct cs4281_softc *sc;
+	u_int32_t acctl;
+
+	sc = addr;
+
+	DPRINTFN(5,("write_codec: add=0x%02x  data=0x%04x\n", ac97_addr, ac97_data));
+	BA0WRITE4(sc, CS4281_ACCAD, ac97_addr);
+	BA0WRITE4(sc, CS4281_ACCDA, ac97_data);
+
+	acctl = ACCTL_ESYN | ACCTL_VFRM | ACCTL_DCV;
+	BA0WRITE4(sc, CS4281_ACCTL, acctl);
+
+	if (cs4281_src_wait(sc) < 0) {
+		printf("%s: AC97 write fail (DCV!=0) for add=0x%02x data="
+		       "0x%04x\n", sc->sc_dev.dv_xname, ac97_addr, ac97_data);
+		return (1);
+	}
+	return (0);
+}
+
+int
+cs4281_allocmem(struct cs4281_softc *sc, size_t size, int pool, int flags,
+		struct cs4281_dma *p)
+{
+	int error;
+	size_t align;
+	
+	align   = sc->dma_align;
+	p->size = sc->dma_size;
+	/* allocate memory for upper audio driver */
+	p->dum  = malloc(size, pool, flags);
+	if (!p->dum)
+		return (1);
+	error = bus_dmamem_alloc(sc->sc_dmatag, p->size, align, 0,
+				 p->segs, sizeof(p->segs)/sizeof(p->segs[0]),
+				 &p->nsegs, BUS_DMA_NOWAIT);
+	if (error) {
+		printf("%s: unable to allocate dma. error=%d\n",
+		       sc->sc_dev.dv_xname, error);
+		return (error);
+	}
+
+	error = bus_dmamem_map(sc->sc_dmatag, p->segs, p->nsegs, p->size,
+			       &p->addr, BUS_DMA_NOWAIT|BUS_DMA_COHERENT);
+	if (error) {
+		printf("%s: unable to map dma, error=%d\n",
+		       sc->sc_dev.dv_xname, error);
+		goto free;
+	}
+
+	error = bus_dmamap_create(sc->sc_dmatag, p->size, 1, p->size,
+				  0, BUS_DMA_NOWAIT, &p->map);
+	if (error) {
+		printf("%s: unable to create dma map, error=%d\n",
+		       sc->sc_dev.dv_xname, error);
+		goto unmap;
+	}
+
+	error = bus_dmamap_load(sc->sc_dmatag, p->map, p->addr, p->size, NULL,
+				BUS_DMA_NOWAIT);
+	if (error) {
+		printf("%s: unable to load dma map, error=%d\n",
+		       sc->sc_dev.dv_xname, error);
+		goto destroy;
+	}
+	return (0);
+
+destroy:
+	bus_dmamap_destroy(sc->sc_dmatag, p->map);
+unmap:
+	bus_dmamem_unmap(sc->sc_dmatag, p->addr, p->size);
+free:
+	bus_dmamem_free(sc->sc_dmatag, p->segs, p->nsegs);
+	return (error);
+}
+
+
+int
+cs4281_src_wait(sc)
+	struct cs4281_softc *sc;
+{
+	int n;
+
+	n = 0;
+	while ((BA0READ4(sc, CS4281_ACCTL) & ACCTL_DCV)) {
+		delay(1000);
+		while (++n > 1000)
+			return (-1);
+	}
+	return (0);
+}
diff --git a/sys/dev/pci/cs4281reg.h b/sys/dev/pci/cs4281reg.h
new file mode 100644
index 00000000000..73f2c39118e
--- /dev/null
+++ b/sys/dev/pci/cs4281reg.h
@@ -0,0 +1,323 @@
+/*	$OpenBSD: cs4281reg.h,v 1.1 2001/01/13 19:53:50 aaron Exp $ */
+/*	$Tera: cs4281reg.h,v 1.9 2000/12/31 10:52:25 tacha Exp $	*/
+
+/*
+ * Copyright (c) 2000 Tatoku Ogaito.  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.
+ * 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. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *      This product includes software developed by Tatoku Ogaito
+ *	for the NetBSD Project.
+ * 4. 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.
+ */
+
+
+#define CS4281_BA0_SIZE		
+#define CS4281_BA1_SIZE	 	0x10000
+#define CS4281_BUFFER_SIZE      0x10000
+
+/* Base Address 0 */
+
+/* Interrupt Reporting Registers */
+#define CS4281_HISR    0x000 /* Host Interrupt Status Register*/
+#define  HISR_INTENA       0x80000000
+#define  HISR_MIDI         0x00400000
+#define  HISR_FIFOI        0x00100000
+#define  HISR_DMAI         0x00040000
+#define  HISR_FIFO3        0x00008000
+#define  HISR_FIFO2        0x00004000
+#define  HISR_FIFO1        0x00002000
+#define  HISR_FIFO0        0x00001000
+#define  HISR_DMA3         0x00000800
+#define  HISR_DMA2         0x00000400
+#define  HISR_DMA1         0x00000200
+#define  HISR_DMA0         0x00000100
+#define  HISR_GPPI         0x00000020
+#define  HISR_GPSI         0x00000010
+#define  HISR_GP3I         0x00000008
+#define  HISR_GP1I         0x00000004
+#define  HISR_VUPI         0x00000002
+#define  HISR_VDNI         0x00000001
+
+#define CS4281_HICR    0x008 /* Host Interrupt Control Register */
+#define  HICR_CHGM         0x00000002
+#define  HICR_IEV          0x00000001
+
+#define CS4281_HIMR    0x00C /* Host Interrupt Mask Register */
+#define  HIMR_MIDIM        0x00400000
+#define  HIMR_FIFOIM       0x00100000
+#define  HIMR_DMAIM        0x00040000
+#define  HIMR_F3IM         0x00008000
+#define  HIMR_F2IM         0x00004000
+#define  HIMR_F1IM         0x00002000
+#define  HIMR_F0IM         0x00001000
+#define  HIMR_D3IM         0x00000800
+#define  HIMR_D2IM         0x00000400
+#define  HIMR_D1IM         0x00000200
+#define  HIMR_D0IM         0x00000100
+#define  HIMR_GPPIM        0x00000020
+#define  HIMR_GPSIM        0x00000010
+#define  HIMR_GP3IM        0x00000008
+#define  HIMR_GP1IM        0x00000004
+#define  HIMR_VUPIM        0x00000002
+#define  HIMR_VDNIM        0x00000001
+
+#define CS4281_IIER    0x010 /* ISA Interrupt Enable Register */
+
+#define CS4281_HDSR0   0x0F0 /* Host DMA Engine 0 Status Register */
+#define CS4281_HDSR1   0x0F4 /* Host DMA Engine 1 Status Register */
+#define CS4281_HDSR2   0x0F8 /* Host DMA Engine 2 Status Register */
+#define CS4281_HDSR3   0x0FC /* Host DMA Engine 3 Status Register */
+#define CS4281_DCA0    0x110 /* DMA Engine 0 Current Address Register */
+#define CS4281_DCC0    0x114 /* DMA Engine 0 Current Count Register */
+#define CS4281_DBA0    0x118 /* DMA Engine 0 Base Address Register */
+#define CS4281_DBC0    0x11C /* DMA Engine 0 Base Count Register */
+#define CS4281_DCA1    0x120 /* DMA Engine 1 Current Address Register */
+#define CS4281_DCC1    0x124 /* DMA Engine 1 Current Count Register */
+#define CS4281_DBA1    0x128 /* DMA Engine 1 Base Address Register */
+#define CS4281_DBC1    0x12C /* DMA Engine 1 Base Count Register */
+#define CS4281_DCA2    0x130 /* DMA Engine 2 Current Address Register */
+#define CS4281_DCC2    0x134 /* DMA Engine 2 Current Count Register */
+#define CS4281_DBA2    0x138 /* DMA Engine 2 Base Address Register */
+#define CS4281_DBC2    0x13C /* DMA Engine 2 Base Count Register */
+#define CS4281_DCA3    0x140 /* DMA Engine 3 Current Address Register */
+#define CS4281_DCC3    0x144 /* DMA Engine 3 Current Count Register */
+#define CS4281_DBA3    0x148 /* DMA Engine 3 Base Address Register */
+#define CS4281_DBC3    0x14C /* DMA Engine 3 Base Count Register */
+#define CS4281_DMR0    0x150 /* DMA Engine 0 Mode Register */
+#define CS4281_DCR0    0x154 /* DMA Engine 0 Command Register */
+#define CS4281_DMR1    0x158 /* DMA Engine 1 Mode Register */
+#define CS4281_DCR1    0x15C /* DMA Engine 1 Command Register */
+#define CS4281_DMR2    0x160 /* DMA Engine 2 Mode Register */
+#define CS4281_DCR2    0x164 /* DMA Engine 2 Command Register */
+#define CS4281_DMR3    0x168 /* DMA Engine 3 Mode Register */
+#define CS4281_DCR3    0x16C /* DMA Engine 3 Command Register */
+/* DMRn common bit description*/
+#define  DMRn_DMA      0x20000000
+#define  DMRn_POLL     0x10000000
+#define  DMRn_TBC      0x02000000
+#define  DMRn_CBC      0x01000000
+#define  DMRn_SWAPC    0x00400000
+#define  DMRn_SIZE20   0x00100000
+#define  DMRn_USIGN    0x00080000
+#define  DMRn_BEND     0x00040000
+#define  DMRn_MONO     0x00020000
+#define  DMRn_SIZE8    0x00010000
+#define  DMRn_FMTMSK   ( DMRn_SWAPC | DMRn_SIZE20 | DMRn_USIGN | DMRn_BEND | DMRn_MONO | DMRn_SIZE8 )
+#define  DMRn_TYPE1    0x00000080
+#define  DMRn_TYPE0    0x00000040
+#define  DMRn_DEC      0x00000020
+#define  DMRn_AUTO     0x00000010
+#define  DMRn_TR_MASK  0x0000000c
+#define  DMRn_TR_READ  0x00000008
+#define  DMRn_TR_WRITE 0x00000004
+/* DCRn common bit description*/
+#define  DCRn_HTCIE    0x00020000 /* Half Terminal Count Interrupt Enable */
+#define  DCRn_TCIE     0x00010000 /* Terminal Count Interrupt Enable */
+#define  DCRn_MSK      0x00000001
+
+#define CS4281_FCR0    0x180 /* FIFO Control Register 0 */
+#define CS4281_FCR1    0x184 /* FIFO Control Register 1 */
+#define CS4281_FCR2    0x188 /* FIFO Control Register 2 */
+#define CS4281_FCR3    0x18C /* FIFO Control Register 3 */
+#define  FCRn_FEN      0x80000000
+#define  FCRn_DACZ     0x40000000
+#define  FCRn_PSH      0x20000000
+
+#define CS4281_FPDR0   0x190 /* FIFO Polled Data Register 0 */
+#define CS4281_FPDR1   0x194 /* FIFO Polled Data Register 1 */
+#define CS4281_FPDR2   0x198 /* FIFO Polled Data Register 2 */
+#define CS4281_FPDR3   0x19C /* FIFO Polled Data Register 3 */
+#define CS4281_FCHS    0x20C /* FIFO Channel Status */
+#define CS4281_FSIC0   0x210 /* FIFO Status and Interrupt Control Register 0 */
+#define CS4281_FSIC1   0x214 /* FIFO Status and Interrupt Control Register 1 */
+#define CS4281_FSIC2   0x218 /* FIFO Status and Interrupt Control Register 2 */
+#define CS4281_FSIC3   0x21C /* FIFO Status and Interrupt Control Register 3 */
+
+#if 0
+300h - 340h /*    PCI Configuration Space Echo, offsets 00h - 42h, RO */
+#endif
+
+#define CS4281_PMCS    0x344 /* Power Management Control/Status */
+#define CS4281_CWPR    0x3E0 /* Configuration Write Protect Register */
+#define CS4281_EPPMC   0x3E4 /* Extended PCI Power Management Control */
+#define CS4281_GPIOR   0x3E8 /* GPIO Pin Interface Register */
+#define CS4281_SPMC    0x3EC /* Serial Port Power Management Control (& ASDIN2 enable) */
+#define  SPMC_RSTN     0x00000001
+#define  SPMC_ASYN     0x00000002
+#define  SPMC_WUP1     0x00000004
+#define  SPMC_WUP2     0x00000008
+#define  SPMC_ASDO     0x00000080
+#define  SPMC_ASDI2E   0x00000100
+#define  SPMC_EESPD    0x00000200
+#define  SPMC_GISPEN   0x00000400
+#define  SPMC_GIPPEN   0x00008000
+#define CS4281_CFLR    0x3F0 /* Configuration Load Register (EEPROM or BIOS) */
+#define CS4281_IISR    0x3F4 /* ISA Interrupt Select Register */
+#define CS4281_TMS     0x3F8 /* Test Register - Reserved */
+
+#define CS4281_SSVID   0x3FC /* Subsystem ID register (read-only version at 32Ch) */
+
+#define CS4281_CLKCR1  0x400 /* Clock Control Register 1 */
+#define  CLKCR1_DLLSS0 0x00000004
+#define  CLKCR1_DLLSS1 0x00000008
+#define  CLKCR1_DLLP   0x00000010
+#define  CLKCR1_SWCE   0x00000020
+#define  CLKCR1_DLLOS  0x00000040
+#define  CLKCR1_CKRA   0x00010000
+#define  CLKCR1_CKRN   0x00020000
+#define  CLKCR1_DLLRDY 0x01000000
+#define  CLKCR1_CLKON  0x02000000
+
+#define CS4281_FRR     0x410 /* Feature Reporting Register */
+#define CS4281_SLT12O  0x41C /* Slot 12 GPIO Output Register for AC Link */
+
+#define CS4281_SERMC   0x420 /* Serial Port Master Control Register */
+#define  SERMC_MSPE    0x00000001
+#define  SERMC_PTCMASK 0x0000000E
+#define  SERMC_PTCAC97 0x00000002
+#define  SERMC_PLB     0x00000100
+#define  SERMC_PXLB    0x00000200
+#define  SERMC_TCID0   0x00010000
+#define  SERMC_TICD1   0x00020000
+#define  SERMC_LOVF    0x00080000
+#define  SERMC_SLB     0x00100000
+#define  SERMC_SXLB    0x00200000
+#define  SERMC_ODSEN1  0x01000000
+#define  SERMC_ODSEN2  0x02000000
+#define  SERMC_FCRN    0x08000000
+#define CS4281_SERC1   0x428 /* Serial Port Configuration Register 1 - RO */
+#define CS4281_SERC2   0x42C /* Serial Port Configuration Register 2 - RO */
+
+#define CS4281_SLT12M  0x45C /* Slot 12 Monitor Register for Primary AC Link */
+
+/*
+ * AC97 Registers are moved to cs428xreg.h since
+ * they are common for CS4280 and CS4281
+ */
+
+#define CS4281_JSPT    0x480 /* Joystick Poll/Trigger Register */
+#define CS4281_JSCTL   0x484 /* Joystick Control Register */
+#define CS4281_MIDCR   0x490 /* MIDI Control Register */
+#define CS4281_MIDCMD  0x494 /* MIDI Command Register - WO */
+#define CS4281_MIDSR   0x494 /* MIDI Status Register - RO */
+#define CS4281_MIDWP   0x498 /* MIDI Write Port */
+#define CS4281_MIDRP   0x49C /* MIDI Read Port - RO */
+#define CS4281_AODSD1  0x4A8 /* AC `97 On-Demand Slot Disable for primary link - RO */
+#define CS4281_AODSD2  0x4AC /* AC `97 On-Demand Slot Disable for secondary link - RO */
+#define CS4281_CFGI    0x4B0 /* Configuration Interface Register (EEPROM interface) */
+#define CS4281_SLT12M2 0x4DC /* Slot 12 Monitor Register 2 for Secondary AC Link */
+#define CS4281_ACSTS2  0x4E4 /* AC 97 Status Register 2 */
+#define  ACSTS2_CRDY2  0x00000001
+#define  ACSTS2_BSYS2  0x00000002
+#define CS4281_ACISV2  0x4F4 /* AC 97 Input Slot Valid Register 2 */
+#define CS4281_ACSAD2  0x4F8 /* AC 97 Status Address Register 2 */
+#define CS4281_ACSDA2  0x4FC /* AC 97 Status Data Register 2 */
+#define CS4281_FMSR    0x730 /* FM Synthesis Status Register - RO */
+#define CS4281_B0AP    0x730 /* FM Bank 0 Address Port - WO */
+#define CS4281_FMDP    0x734 /* FM Data Port */
+#define CS4281_B1AP    0x738 /* FM Bank 1 Address Port */
+#define CS4281_B1DP    0x73C /* FM Bank 1 Data Port */
+#define CS4281_SSPM    0x740 /* Sound System Power Management */
+#define  SSPM_ALL      0x0000007E
+#define  SSPM_MIXEN    0x00000040   /* p167 */
+#define  SSPM_CSRCEN   0x00000020
+#define  SSPM_PSRCEN   0x00000010
+#define  SSPM_JSEN     0x00000008
+#define  SSPM_ACLEN    0x00000004
+#define  SSPM_FMEN     0x00000002
+
+#define CS4281_DACSR   0x744 /* DAC Sample Rate - Playback SRC */
+#define CS4281_ADCSR   0x748 /* ADC Sample Rate - Capture SRC */
+#define CS4281_SSCR    0x74C /* Sound System Control Register */
+#define  SSCR_HVS1     0x00800000  /* Hardware Volume step by 1 */
+#define  SSCR_MVCS     0x00080000  /* Master Volume Codec Select */
+#define  SSCR_MVLD     0x00040000  /* Master Volume Line Out Disable */
+#define  SSCR_MVAD     0x00020000  /* Master Volume Alternate Out Disable */
+#define  SSCR_MVMD     0x00010000  /* Master Volume Mono Out Disable */
+#define  SSCR_XLPSRC   0x00000100  /* External SRC loopback mode */
+#define  SSCR_LPSRC    0x00000080  /* SRC loopback mode */
+#define  SSCR_CDTX     0x00000020  /* CD Transfer Data */
+#define  SSCR_HVC      0x00000008  /* Hardware Volume Control Enable */
+#define CS4281_FMLVC   0x754 /* FM Synthesis Left Volume Control */
+#define CS4281_FMRVC   0x758 /* FM Synthesis Right Volume Control */
+#define CS4281_SRCSA   0x75C /* SRC Slot Assignments */
+#define CS4281_PPLVC   0x760 /* PCM Playback Left Volume Control */
+#define CS4281_PPRVC   0x764 /* PCM Playback Right Volume Control */
+
+/* Base Address 1 Direct Memory Map */
+
+#if 0
+0000h - 03FFh    FIFO RAM    Audio Sample RAM Memory Block - FIFOs
+                             Logical Size: 256 x 32 bits (1 kbytes stereo double words)
+0400h - D51Fh    Reserved    Reserved internal memory
+D600h - FFFFh    Reserved    Reserved for future use
+#endif
+
+#define CS4281_ACCTL   0x460    /* AC97 Control Register */
+#define  ACCTL_RSTN        0x00000001 /* Only for CS4280 */
+#define  ACCTL_ESYN        0x00000002
+#define  ACCTL_VFRM        0x00000004
+#define  ACCTL_DCV         0x00000008
+#define  ACCTL_CRW         0x00000010
+#define  ACCTL_ASYN        0x00000020 /* Only for CS4280 */
+#define  ACCTL_TC          0x00000040
+
+#define CS4281_ACSTS   0x464    /* AC97 Status Register */
+#define  ACSTS_CRDY        0x00000001
+#define  ACSTS_VSTS        0x00000002
+
+#define CS4281_ACOSV   0x468	/* AC97 Output Slot Valid Register */
+#define  ACOSV_SLV3        0x00000001
+#define  ACOSV_SLV4        0x00000002
+#define  ACOSV_SLV5        0x00000004
+#define  ACOSV_SLV6        0x00000008
+#define  ACOSV_SLV7        0x00000010
+#define  ACOSV_SLV8        0x00000020
+#define  ACOSV_SLV9        0x00000040
+#define  ACOSV_SLV10       0x00000080
+#define  ACOSV_SLV11       0x00000100
+#define  ACOSV_SLV12       0x00000200
+
+#define CS4281_ACCAD   0x46c	/* AC97 Command Address Register */
+#define CS4281_ACCDA   0x470	/* AC97 Command Data Register */
+
+#define CS4281_ACISV   0x474	/* AC97 Input Slot Valid Register */
+#define  ACISV_ISV3        0x00000001
+#define  ACISV_ISV4        0x00000002
+#define  ACISV_ISV5        0x00000004
+#define  ACISV_ISV6        0x00000008
+#define  ACISV_ISV7        0x00000010
+#define  ACISV_ISV8        0x00000020
+#define  ACISV_ISV9        0x00000040
+#define  ACISV_ISV10       0x00000080
+#define  ACISV_ISV11       0x00000100
+#define  ACISV_ISV12       0x00000200
+#define CS4281_ACSAD   0x478	/* AC97 Status Address Register */
+#define CS4281_ACSDA   0x47c	/* AC97 Status Data Register */
+
+/* AC97 Registers */
+#define CS4281_SAVE_REG_MAX	0x10
+
+/* for AC97_REG_POWER */
+#define CS4281_POWER_DOWN_ALL	0x7f0f
diff --git a/sys/dev/pci/files.pci b/sys/dev/pci/files.pci
index bad03323099..ea40d9b9230 100644
--- a/sys/dev/pci/files.pci
+++ b/sys/dev/pci/files.pci
@@ -1,4 +1,4 @@
-#	$OpenBSD: files.pci,v 1.89 2001/01/11 23:36:38 espie Exp $
+#	$OpenBSD: files.pci,v 1.90 2001/01/13 19:53:50 aaron Exp $
 #	$NetBSD: files.pci,v 1.20 1996/09/24 17:47:15 christos Exp $
 #
 # Config file and device description for machine-independent PCI code.
@@ -90,6 +90,11 @@ device	clcs: audio, auconv, mulaw, ac97
 attach	clcs at pci
 file	dev/pci/cs4280.c		clcs
 
+# CS4281 CrystalClear Audio
+device	clct: audio, auconv, mulaw, ac97
+attach	clct at pci
+file	dev/pci/cs4281.c		clct
+
 # ESS Maestro
 device maestro: audio, auconv, mulaw, ac97
 attach maestro at pci