intel ich/ich2 driver - this needs some work but is functional enough for

the impatient.

Hardware...
Provided by:    ps
Lost by:        <censored>
Found by:       <censored>
Not delivered by:       Ashley Penney <ashp@unloved.org>
Retrieved by:   greid, Andrew McKay <andy@openirc.co.uk>
Delivered by:   Andrew McKay <andy@openirc.co.uk>

PR:             kern/25507
Submitted by:   Katsurajima Naoto <raven@katsurajima.seya.yokohama.jp>

5 files changed, 1218 insertions, 3 deletions

diff --git a/sys/conf/files b/sys/conf/files
index f1ef01e..ea61f4d 100644
--- a/sys/conf/files
+++ b/sys/conf/files
@@ -509,6 +509,7 @@ dev/sound/pci/ds1.c	optional pcm pci
 dev/sound/pci/emu10k1.c	optional pcm pci
 dev/sound/pci/es137x.c	optional pcm pci
 dev/sound/pci/fm801.c	optional pcm pci
+dev/sound/pci/ich.c	optional pcm pci
 dev/sound/pci/maestro.c optional pcm pci
 dev/sound/pci/neomagic.c optional pcm pci
 dev/sound/pci/solo.c	optional pcm pci
@@ -529,6 +530,7 @@ dev/sound/pcm/feeder_fmt.c	optional pcm
 dev/sound/pcm/feeder_rate.c	optional pcm
 dev/sound/pcm/mixer.c	optional pcm
 dev/sound/pcm/mixer_if.m	optional pcm
+dev/sound/pcm/sndstat.c	optional pcm
 dev/sound/pcm/sound.c	optional pcm
 dev/sound/pcm/vchan.c	optional pcm
 #dev/sound/usb/upcm.c	optional pcm usb
diff --git a/sys/dev/sound/driver.c b/sys/dev/sound/driver.c
index 4c2e098..c35f6fa 100644
--- a/sys/dev/sound/driver.c
+++ b/sys/dev/sound/driver.c
@@ -63,7 +63,9 @@ MODULE_DEPEND(snd_driver, snd_emu10k1, 1, 1, 1);
 MODULE_DEPEND(snd_driver, snd_es137x, 1, 1, 1);
 MODULE_DEPEND(snd_driver, snd_es1888, 1, 1, 1);
 MODULE_DEPEND(snd_driver, snd_ess, 1, 1, 1);
+MODULE_DEPEND(snd_driver, snd_fm801, 1, 1, 1);
 MODULE_DEPEND(snd_driver, snd_gusc, 1, 1, 1);
+MODULE_DEPEND(snd_driver, snd_ich, 1, 1, 1);
 MODULE_DEPEND(snd_driver, snd_maestro, 1, 1, 1);
 MODULE_DEPEND(snd_driver, snd_maestro3, 1, 1, 1);
 MODULE_DEPEND(snd_driver, snd_mss, 1, 1, 1);
diff --git a/sys/dev/sound/pci/ich.c b/sys/dev/sound/pci/ich.c
new file mode 100644
index 0000000..362adf3
--- /dev/null
+++ b/sys/dev/sound/pci/ich.c
@@ -0,0 +1,1203 @@
+/*
+ * Copyright (c) 2000 Katsurajima Naoto <raven@katsurajima.seya.yokohama.jp>
+ * 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``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 OR CONTRIBUTORS 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, WHETHERIN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THEPOSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * $FreeBSD$
+ */
+
+#include <dev/sound/pcm/sound.h>
+#include <dev/sound/pcm/ac97.h>
+
+#include <pci/pcireg.h>
+#include <pci/pcivar.h>
+
+
+/* -------------------------------------------------------------------- */
+
+#define ICH_RECPRIMARY 0
+
+#define ICH_TIMEOUT 1000 /* semaphore timeout polling count */
+
+#define PCIR_NAMBAR 0x10
+#define PCIR_NABMBAR 0x14
+
+/* Native Audio Bus Master Control Registers */
+#define ICH_REG_PI_BDBAR 0x00
+#define ICH_REG_PI_CIV   0x04
+#define ICH_REG_PI_LVI   0x05
+#define ICH_REG_PI_SR    0x06
+#define ICH_REG_PI_PICB  0x08
+#define ICH_REG_PI_PIV   0x0a
+#define ICH_REG_PI_CR    0x0b
+#define ICH_REG_PO_BDBAR 0x10
+#define ICH_REG_PO_CIV   0x14
+#define ICH_REG_PO_LVI   0x15
+#define ICH_REG_PO_SR    0x16
+#define ICH_REG_PO_PICB  0x18
+#define ICH_REG_PO_PIV   0x1a
+#define ICH_REG_PO_CR    0x1b
+#define ICH_REG_MC_BDBAR 0x20
+#define ICH_REG_MC_CIV   0x24
+#define ICH_REG_MC_LVI   0x25
+#define ICH_REG_MC_SR    0x26
+#define ICH_REG_MC_PICB  0x28
+#define ICH_REG_MC_PIV   0x2a
+#define ICH_REG_MC_CR    0x2b
+#define ICH_REG_GLOB_CNT 0x2c
+#define ICH_REG_GLOB_STA 0x30
+#define ICH_REG_ACC_SEMA 0x34
+/* Status Register Values */
+#define ICH_X_SR_DCH   0x0001
+#define ICH_X_SR_CELV  0x0002
+#define ICH_X_SR_LVBCI 0x0004
+#define ICH_X_SR_BCIS  0x0008
+#define ICH_X_SR_FIFOE 0x0010
+/* Control Register Values */
+#define ICH_X_CR_RPBM  0x01
+#define ICH_X_CR_RR    0x02
+#define ICH_X_CR_LVBIE 0x04
+#define ICH_X_CR_FEIE  0x08
+#define ICH_X_CR_IOCE  0x10
+/* Global Control Register Values */
+#define ICH_GLOB_CTL_GIE  0x00000001
+#define ICH_GLOB_CTL_COLD 0x00000002 /* negate */
+#define ICH_GLOB_CTL_WARM 0x00000004
+#define ICH_GLOB_CTL_SHUT 0x00000008
+#define ICH_GLOB_CTL_PRES 0x00000010
+#define ICH_GLOB_CTL_SRES 0x00000020
+/* Global Status Register Values */
+#define ICH_GLOB_STA_GSCI   0x00000001
+#define ICH_GLOB_STA_MIINT  0x00000002
+#define ICH_GLOB_STA_MOINT  0x00000004
+#define ICH_GLOB_STA_PIINT  0x00000020
+#define ICH_GLOB_STA_POINT  0x00000040
+#define ICH_GLOB_STA_MINT   0x00000080
+#define ICH_GLOB_STA_PCR    0x00000100
+#define ICH_GLOB_STA_SCR    0x00000200
+#define ICH_GLOB_STA_PRES   0x00000400
+#define ICH_GLOB_STA_SRES   0x00000800
+#define ICH_GLOB_STA_SLOT12 0x00007000
+#define ICH_GLOB_STA_RCODEC 0x00008000
+#define ICH_GLOB_STA_AD3    0x00010000
+#define ICH_GLOB_STA_MD3    0x00020000
+#define ICH_GLOB_STA_IMASK  (ICH_GLOB_STA_MIINT | ICH_GLOB_STA_MOINT | ICH_GLOB_STA_PIINT | ICH_GLOB_STA_POINT | ICH_GLOB_STA_MINT | ICH_GLOB_STA_PRES | ICH_GLOB_STA_SRES)
+
+/* AC'97 power/ready functions */
+#define AC97_POWER_PINPOWER  0x0100
+#define AC97_POWER_PINREADY  0x0001
+#define AC97_POWER_POUTPOWER 0x0200
+#define AC97_POWER_POUTREADY 0x0002
+
+/* play/record buffer */
+#define ICH_FIFOINDEX 32
+#define ICH_BDC_IOC 0x80000000
+#define ICH_BDC_BUP 0x40000000
+#define ICH_DEFAULT_BLOCKSZ 2048
+/* buffer descriptor */
+struct ich_desc {
+	volatile u_int32_t buffer;
+	volatile u_int32_t length;
+};
+
+struct sc_info;
+
+/* channel registers */
+struct sc_chinfo {
+	int run, spd, dir, fmt;
+	struct snd_dbuf *buffer;
+	struct pcm_channel *channel;
+	struct sc_info *parent;
+	struct ich_desc *index;
+	bus_dmamap_t imap;
+	u_int32_t lvi;
+};
+
+/* device private data */
+struct sc_info {
+	device_t	dev;
+	u_int32_t 	type, rev;
+	u_int32_t	cd2id, ctrlbase;
+
+	struct resource *nambar, *nabmbar;
+	int		nambarid, nabmbarid;
+	bus_space_tag_t nambart, nabmbart;
+	bus_space_handle_t nambarh, nabmbarh;
+	bus_dma_tag_t dmat;
+	struct resource *irq;
+	int		irqid;
+	void		*ih;
+
+	struct ac97_info *codec;
+	struct sc_chinfo *pi, *po;
+};
+
+struct {
+	u_int32_t dev, subdev;
+	char *name;
+} ich_devs[] = {
+	{0x71958086, 0, "Intel 443MX"},
+	{0x24158086, 0, "Intel 82801AA (ICH)"},
+	{0x24258086, 0, "Intel 82901AB (ICH)"},
+	{0x24458086, 0, "Intel 82801BA (ICH2)"},
+	{0, 0, NULL}
+};
+
+/* variable rate audio */
+static u_int32_t ich_rate[] = {
+    48000, 44100, 22050, 16000, 11025, 8000, 0
+};
+
+/* -------------------------------------------------------------------- */
+
+/*
+ * prototypes
+ */
+
+/* channel interface */
+static void *ichpchan_init(kobj_t, void *, struct snd_dbuf *, struct pcm_channel *, int);
+static int ichpchan_setformat(kobj_t, void *, u_int32_t);
+static int ichpchan_setspeed(kobj_t, void *, u_int32_t);
+static int ichpchan_setblocksize(kobj_t, void *, u_int32_t);
+static int ichpchan_trigger(kobj_t, void *, int);
+static int ichpchan_getptr(kobj_t, void *);
+static struct pcmchan_caps *ichpchan_getcaps(kobj_t, void *);
+
+static void *ichrchan_init(kobj_t, void *, struct snd_dbuf *, struct pcm_channel *, int);
+static int ichrchan_setformat(kobj_t, void *, u_int32_t);
+static int ichrchan_setspeed(kobj_t, void *, u_int32_t);
+static int ichrchan_setblocksize(kobj_t, void *, u_int32_t);
+static int ichrchan_trigger(kobj_t, void *, int);
+static int ichrchan_getptr(kobj_t, void *);
+static struct pcmchan_caps *ichrchan_getcaps(kobj_t, void *);
+
+/* stuff */
+static int       ich_init(struct sc_info *);
+static void      ich_intr(void *);
+
+/* -------------------------------------------------------------------- */
+
+static u_int32_t ich_recfmt[] = {
+	AFMT_STEREO | AFMT_S16_LE,
+	0
+};
+static struct pcmchan_caps ich_reccaps = {8000, 48000, ich_recfmt, 0};
+
+static u_int32_t ich_playfmt[] = {
+	AFMT_STEREO | AFMT_S16_LE,
+	0
+};
+static struct pcmchan_caps ich_playcaps = {8000, 48000, ich_playfmt, 0};
+
+/* -------------------------------------------------------------------- */
+/* Hardware */
+static u_int32_t
+ich_rd(struct sc_info *sc, int regno, int size)
+{
+	switch (size) {
+	case 1:
+		return bus_space_read_1(sc->nambart, sc->nambarh, regno);
+	case 2:
+		return bus_space_read_2(sc->nambart, sc->nambarh, regno);
+	case 4:
+		return bus_space_read_4(sc->nambart, sc->nambarh, regno);
+	default:
+		return 0xffffffff;
+	}
+}
+
+static void
+ich_wr(struct sc_info *sc, int regno, u_int32_t data, int size)
+{
+	switch (size) {
+	case 1:
+		bus_space_write_1(sc->nambart, sc->nambarh, regno, data);
+		break;
+	case 2:
+		bus_space_write_2(sc->nambart, sc->nambarh, regno, data);
+		break;
+	case 4:
+		bus_space_write_4(sc->nambart, sc->nambarh, regno, data);
+		break;
+	}
+}
+
+/* ac97 codec */
+static int
+ich_waitcd(void *devinfo)
+{
+	int i;
+	u_int32_t data;
+	struct sc_info *sc = (struct sc_info *)devinfo;
+	for (i = 0;i < ICH_TIMEOUT;i++) {
+		data = bus_space_read_1(sc->nabmbart, sc->nabmbarh,
+		    ICH_REG_ACC_SEMA);
+		if ((data & 0x01) == 0)
+			return 0;
+	}
+	device_printf(sc->dev, "CODEC semaphore timeout\n");
+	return ETIMEDOUT;
+}
+
+static int
+ich_rdcd(kobj_t obj, void *devinfo, int regno)
+{
+	struct sc_info *sc = (struct sc_info *)devinfo;
+	regno &= 0xff;
+	ich_waitcd(sc);
+	return ich_rd(sc, regno, 2);
+}
+
+static int
+ich_wrcd(kobj_t obj, void *devinfo, int regno, u_int32_t data)
+{
+	struct sc_info *sc = (struct sc_info *)devinfo;
+	regno &= 0xff;
+	ich_waitcd(sc);
+	ich_wr(sc, regno, data, 2);
+	return 0;
+}
+
+static kobj_method_t ich_ac97_methods[] = {
+	KOBJMETHOD(ac97_read,		ich_rdcd),
+	KOBJMETHOD(ac97_write,		ich_wrcd),
+	{ 0, 0 }
+};
+AC97_DECLARE(ich_ac97);
+
+/* -------------------------------------------------------------------- */
+
+/* channel common routines */
+static void
+ichchan_setmap(void *arg, bus_dma_segment_t *segs, int nseg, int error)
+{
+	struct sc_chinfo *ch = arg;
+
+	if (bootverbose) {
+		device_printf(ch->parent->dev, "setmap(0x%lx, 0x%lx)\n", (unsigned long)segs->ds_addr, (unsigned long)segs->ds_len);
+	}
+}
+
+static int
+ichchan_initbuf(struct sc_chinfo *ch)
+{
+	struct sc_info *sc = ch->parent;
+	int i;
+
+	if (sndbuf_alloc(ch->buffer, sc->dmat, ICH_DEFAULT_BLOCKSZ * ICH_FIFOINDEX)) {
+		return ENOSPC;
+	}
+	if (bus_dmamem_alloc(sc->dmat,(void **)&ch->index, BUS_DMA_NOWAIT, &ch->imap)) {
+		sndbuf_free(ch->buffer);
+		return ENOSPC;
+	}
+	if (bus_dmamap_load(sc->dmat, ch->imap, ch->index,
+	    sizeof(struct ich_desc) * ICH_FIFOINDEX, ichchan_setmap, ch, 0)) {
+		bus_dmamem_free(sc->dmat, (void **)&ch->index, ch->imap);
+		sndbuf_free(ch->buffer);
+		return ENOSPC;
+	}
+	for (i = 0;i < ICH_FIFOINDEX;i++) {
+		ch->index[i].buffer = vtophys(sndbuf_getbuf(ch->buffer)) +
+		    ICH_DEFAULT_BLOCKSZ * i;
+		if (ch->dir == PCMDIR_PLAY)
+			ch->index[i].length = 0;
+		else
+			ch->index[i].length = ICH_BDC_IOC +
+			    ICH_DEFAULT_BLOCKSZ / 2;
+	}
+	return 0;
+}
+
+static void
+ichchan_free(struct sc_chinfo *ch)
+{
+	struct sc_info *sc = ch->parent;
+
+	bus_dmamap_unload(sc->dmat, ch->imap);
+	bus_dmamem_free(sc->dmat, (void **)&ch->index, ch->imap);
+	sndbuf_free(ch->buffer);
+}
+
+/* play channel interface */
+static int
+ichpchan_power(kobj_t obj, struct sc_info *sc, int sw)
+{
+	u_int32_t cr;
+	int i;
+
+	cr = ich_rdcd(obj, sc, AC97_REG_POWER);
+	if (sw) { /* power on */
+		cr &= ~AC97_POWER_POUTPOWER;
+		ich_wrcd(obj, sc, AC97_REG_POWER, cr);
+		for (i = 0;i < ICH_TIMEOUT;i++) {
+			cr = ich_rdcd(obj, sc, AC97_REG_POWER);
+			if ((cr & AC97_POWER_POUTREADY) != 0)
+				break;
+		}
+	}
+	else { /* power off */
+		cr |= AC97_POWER_POUTPOWER;
+		ich_wrcd(obj, sc, AC97_REG_POWER, cr);
+		for (i = 0;i < ICH_TIMEOUT;i++) {
+			cr = ich_rdcd(obj, sc, AC97_REG_POWER);
+			if ((cr & AC97_POWER_POUTREADY) == 0)
+				break;
+		}
+	}
+	if (i == ICH_TIMEOUT)
+		return -1;
+	return 0;
+}
+
+static u_int32_t
+ichpchan_getminspeed(kobj_t obj, void *data)
+{
+	struct sc_chinfo *ch = data;
+	u_int32_t extcap;
+	u_int32_t minspeed = 48000; /* before AC'97 R2.0 */
+	int i = 0;
+
+	extcap = ac97_getextmode(ch->parent->codec);
+	if (extcap & AC97_EXTCAP_VRA) {
+		for (i = 0;ich_rate[i] != 0;i++) {
+			if (ac97_setrate(ch->parent->codec, AC97_REGEXT_FDACRATE, ich_rate[i]) == ich_rate[i])
+				minspeed = ich_rate[i];
+		}
+	}
+	return minspeed;
+}
+
+static void *
+ichpchan_init(kobj_t obj, void *devinfo, struct snd_dbuf *b, struct pcm_channel *c, int dir)
+{
+	struct sc_info *sc = devinfo;
+	struct sc_chinfo *ch;
+	u_int32_t cr;
+	int i;
+
+	bus_space_write_1(sc->nabmbart, sc->nabmbarh, ICH_REG_PO_CR, 0);
+	bus_space_write_1(sc->nabmbart, sc->nabmbarh, ICH_REG_PO_CR,
+	    ICH_X_CR_RR);
+	for (i = 0;i < ICH_TIMEOUT;i++) {
+		cr = bus_space_read_1(sc->nabmbart, sc->nabmbarh,
+		    ICH_REG_PO_CR);
+		if (cr == 0)
+			break;
+	}
+	if (i == ICH_TIMEOUT) {
+		device_printf(sc->dev, "cannot reset play codec\n");
+		return NULL;
+	}
+	if (ichpchan_power(obj, sc, 1) == -1) {
+		device_printf(sc->dev, "play DAC not ready\n");
+		return NULL;
+	}
+	ichpchan_power(obj, sc, 0);
+	if ((ch = malloc(sizeof(*ch), M_DEVBUF, M_NOWAIT)) == NULL) {
+		device_printf(sc->dev, "cannot allocate channel info area\n");
+		return NULL;
+	}
+	ch->buffer = b;
+	ch->channel = c;
+	ch->parent = sc;
+	ch->dir = PCMDIR_PLAY;
+	ch->run = 0;
+	ch->lvi = 0;
+	if (ichchan_initbuf(ch)) {
+		device_printf(sc->dev, "cannot allocate channel buffer\n");
+		free(ch, M_DEVBUF);
+		return NULL;
+	}
+	bus_space_write_4(sc->nabmbart, sc->nabmbarh, ICH_REG_PO_BDBAR,
+	    (u_int32_t)vtophys(ch->index));
+	sc->po = ch;
+	if (bootverbose) {
+		device_printf(sc->dev,"Play codec support rate(Hz): ");
+		for (i = 0;ich_rate[i] != 0;i++) {
+			if (ichpchan_setspeed(obj, ch, ich_rate[i]) == ich_rate[i]) {
+				printf("%d ", ich_rate[i]);
+			}
+		}
+		printf("\n");
+	}
+	ich_playcaps.minspeed = ichpchan_getminspeed(obj, ch);
+	return ch;
+}
+
+static int
+ichpchan_free(kobj_t obj, void *data)
+{
+	struct sc_chinfo *ch = data;
+	ichchan_free(ch);
+	return ichpchan_power(obj, ch->parent, 0);
+}
+
+static int
+ichpchan_setformat(kobj_t obj, void *data, u_int32_t format)
+{
+	struct sc_chinfo *ch = data;
+
+	ch->fmt = format;
+	return 0;
+}
+
+static int
+ichpchan_setspeed(kobj_t obj, void *data, u_int32_t speed)
+{
+	struct sc_chinfo *ch = data;
+	u_int32_t extcap;
+
+	extcap = ac97_getextmode(ch->parent->codec);
+	if (extcap & AC97_EXTCAP_VRA) {
+		ch->spd = (u_int32_t)ac97_setrate(ch->parent->codec, AC97_REGEXT_FDACRATE, speed);
+	}
+	else {
+		ch->spd = 48000; /* before AC'97 R2.0 */
+	}
+#if(0)
+	device_printf(ch->parent->dev, "ichpchan_setspeed():ch->spd = %d\n", ch->spd);
+#endif
+	return ch->spd;
+}
+
+static int
+ichpchan_setblocksize(kobj_t obj, void *data, u_int32_t blocksize)
+{
+	return blocksize;
+}
+
+/* update index */
+static void
+ichpchan_update(struct sc_chinfo *ch)
+{
+	struct sc_info *sc = ch->parent;
+	u_int32_t lvi;
+	int fp;
+	int last;
+	int i;
+
+	fp = sndbuf_getfreeptr(ch->buffer);
+	last = fp - 1;
+	if (last < 0)
+		last = ICH_DEFAULT_BLOCKSZ * ICH_FIFOINDEX - 1;
+	lvi = last / ICH_DEFAULT_BLOCKSZ;
+	if (lvi >= ch->lvi) {
+		for (i = ch->lvi;i < lvi;i++)
+			ch->index[i].length =
+			    ICH_BDC_IOC + ICH_DEFAULT_BLOCKSZ / 2;
+		ch->index[i].length = ICH_BDC_IOC + ICH_BDC_BUP
+		    + (last % ICH_DEFAULT_BLOCKSZ + 1) / 2;
+	}
+	else {
+		for (i = ch->lvi;i < ICH_FIFOINDEX;i++)
+			ch->index[i].length =
+			    ICH_BDC_IOC + ICH_DEFAULT_BLOCKSZ / 2;
+		for (i = 0;i < lvi;i++)
+			ch->index[i].length =
+			    ICH_BDC_IOC + ICH_DEFAULT_BLOCKSZ / 2;
+		ch->index[i].length = ICH_BDC_IOC + ICH_BDC_BUP
+		    + (last % ICH_DEFAULT_BLOCKSZ + 1) / 2;
+	}
+	bus_space_write_1(sc->nabmbart, sc->nabmbarh, ICH_REG_PO_LVI, lvi);
+	ch->lvi = lvi;
+#if(0)
+	device_printf(ch->parent->dev, "ichpchan_update():fp = %d, lvi = %d\n", fp, lvi);
+#endif
+	return;
+}
+static void
+ichpchan_fillblank(struct sc_chinfo *ch)
+{
+	struct sc_info *sc = ch->parent;
+
+	ch->lvi++;
+	if (ch->lvi == ICH_FIFOINDEX)
+		ch->lvi = 0;
+	ch->index[ch->lvi].length = ICH_BDC_BUP + ICH_DEFAULT_BLOCKSZ / 2;
+	bus_space_write_1(sc->nabmbart, sc->nabmbarh, ICH_REG_PO_LVI, ch->lvi);
+	return;
+}
+/* semantic note: must start at beginning of buffer */
+static int
+ichpchan_trigger(kobj_t obj, void *data, int go)
+{
+	struct sc_chinfo *ch = data;
+	struct sc_info *sc = ch->parent;
+	u_int32_t cr;
+	int i;
+
+#if(0)
+	device_printf(ch->parent->dev, "ichpchan_trigger(0x%08x, %d)\n", data, go);
+#endif
+	switch (go) {
+	case PCMTRIG_START:
+#if(0)
+		device_printf(ch->parent->dev, "ichpchan_trigger():PCMTRIG_START\n");
+#endif
+		ch->run = 1;
+		ichpchan_power(obj, sc, 1);
+		bus_space_write_4(sc->nabmbart, sc->nabmbarh, ICH_REG_PO_BDBAR,
+		    (u_int32_t)vtophys(ch->index));
+		ch->lvi = ICH_FIFOINDEX - 1;
+		ichpchan_update(ch);
+		bus_space_write_1(sc->nabmbart, sc->nabmbarh, ICH_REG_PO_CR,
+		    ICH_X_CR_RPBM | ICH_X_CR_LVBIE | ICH_X_CR_IOCE |
+		    ICH_X_CR_FEIE);
+		break;
+	case PCMTRIG_STOP:
+#if(0)
+		device_printf(ch->parent->dev, "ichpchan_trigger():PCMTRIG_STOP\n");
+#endif
+		cr = bus_space_read_1(sc->nabmbart, sc->nabmbarh,
+		    ICH_REG_PO_CR);
+		bus_space_write_1(sc->nabmbart, sc->nabmbarh, ICH_REG_PO_CR,
+		    cr & ~ICH_X_CR_RPBM);
+		ichpchan_power(obj, sc, 0);
+		ch->run = 0;
+		break;
+	case PCMTRIG_ABORT:
+#if(0)
+		device_printf(ch->parent->dev, "ichpchan_trigger():PCMTRIG_ABORT\n");
+#endif
+		bus_space_write_1(sc->nabmbart, sc->nabmbarh, ICH_REG_PO_CR,
+		    0);
+		bus_space_write_1(sc->nabmbart, sc->nabmbarh, ICH_REG_PO_CR,
+		    ICH_X_CR_RR);
+		for (i = 0;i < ICH_TIMEOUT;i++) {
+			cr = bus_space_read_1(sc->nabmbart, sc->nabmbarh,
+			    ICH_REG_PO_CR);
+			if (cr == 0)
+				break;
+		}
+		ichpchan_power(obj, sc, 0);
+		ch->run = 0;
+		ch->lvi = 0;
+		break;
+	default:
+		break;
+	}
+	return 0;
+}
+
+static int
+ichpchan_getptr(kobj_t obj, void *data)
+{
+	struct sc_chinfo *ch = data;
+	struct sc_info *sc = ch->parent;
+	u_int32_t ci;
+
+#if(0)
+	device_printf(ch->parent->dev, "ichpchan_getptr(0x%08x)\n", data);
+#endif
+	ci = bus_space_read_1(sc->nabmbart, sc->nabmbarh, ICH_REG_PO_CIV);
+#if(0)
+	device_printf(ch->parent->dev, "ichpchan_getptr():ICH_REG_PO_CIV = %d\n", ci);
+#endif
+	return ICH_DEFAULT_BLOCKSZ * ci;
+}
+
+static struct pcmchan_caps *
+ichpchan_getcaps(kobj_t obj, void *data)
+{
+	return &ich_playcaps;
+}
+
+static kobj_method_t ichpchan_methods[] = {
+	KOBJMETHOD(channel_init,		ichpchan_init),
+	KOBJMETHOD(channel_free,		ichpchan_free),
+	KOBJMETHOD(channel_setformat,		ichpchan_setformat),
+	KOBJMETHOD(channel_setspeed,		ichpchan_setspeed),
+	KOBJMETHOD(channel_setblocksize,	ichpchan_setblocksize),
+	KOBJMETHOD(channel_trigger,		ichpchan_trigger),
+	KOBJMETHOD(channel_getptr,		ichpchan_getptr),
+	KOBJMETHOD(channel_getcaps,		ichpchan_getcaps),
+	{ 0, 0 }
+};
+CHANNEL_DECLARE(ichpchan);
+
+/* -------------------------------------------------------------------- */
+/* record channel interface */
+static int
+ichrchan_power(kobj_t obj, struct sc_info *sc, int sw)
+{
+	u_int32_t cr;
+	int i;
+
+	cr = ich_rdcd(obj, sc, AC97_REG_POWER);
+	if (sw) { /* power on */
+		cr &= ~AC97_POWER_PINPOWER;
+		ich_wrcd(obj, sc, AC97_REG_POWER, cr);
+		for (i = 0;i < ICH_TIMEOUT;i++) {
+			cr = ich_rdcd(obj, sc, AC97_REG_POWER);
+			if ((cr & AC97_POWER_PINREADY) != 0)
+				break;
+		}
+	}
+	else { /* power off */
+		cr |= AC97_POWER_PINPOWER;
+		ich_wrcd(obj, sc, AC97_REG_POWER, cr);
+		for (i = 0;i < ICH_TIMEOUT;i++) {
+			cr = ich_rdcd(obj, sc, AC97_REG_POWER);
+			if ((cr & AC97_POWER_PINREADY) == 0)
+				break;
+		}
+	}
+	if (i == ICH_TIMEOUT)
+		return -1;
+	return 0;
+}
+
+static u_int32_t
+ichrchan_getminspeed(kobj_t obj, void *data)
+{
+	struct sc_chinfo *ch = data;
+	u_int32_t extcap;
+	u_int32_t minspeed = 48000; /* before AC'97 R2.0 */
+	int i = 0;
+
+	extcap = ac97_getextmode(ch->parent->codec);
+	if (extcap & AC97_EXTCAP_VRM) {
+		for (i = 0;ich_rate[i] != 0;i++) {
+			if (ac97_setrate(ch->parent->codec, AC97_REGEXT_LADCRATE, ich_rate[i]) == ich_rate[i])
+				minspeed = ich_rate[i];
+		}
+	}
+	return minspeed;
+}
+
+static void *
+ichrchan_init(kobj_t obj, void *devinfo, struct snd_dbuf *b, struct pcm_channel *c, int dir)
+{
+	struct sc_info *sc = devinfo;
+	struct sc_chinfo *ch;
+	u_int32_t cr;
+	int i;
+
+	/* reset codec */
+	bus_space_write_1(sc->nabmbart, sc->nabmbarh, ICH_REG_PI_CR, 0);
+	bus_space_write_1(sc->nabmbart, sc->nabmbarh, ICH_REG_PI_CR,
+	    ICH_X_CR_RR);
+	for (i = 0;i < ICH_TIMEOUT;i++) {
+		cr = bus_space_read_1(sc->nabmbart, sc->nabmbarh,
+		    ICH_REG_PI_CR);
+		if (cr == 0)
+			break;
+	}
+	if (i == ICH_TIMEOUT) {
+		device_printf(sc->dev, "cannot reset record codec\n");
+		return NULL;
+	}
+	if (ichrchan_power(obj, sc, 1) == -1) {
+		device_printf(sc->dev, "record ADC not ready\n");
+		return NULL;
+	}
+	ichrchan_power(obj, sc, 0);
+	if ((ch = malloc(sizeof(*ch), M_DEVBUF, M_NOWAIT)) == NULL) {
+		device_printf(sc->dev, "cannot allocate channel info area\n");
+		return NULL;
+	}
+	ch->buffer = b;
+	ch->channel = c;
+	ch->parent = sc;
+	ch->dir = PCMDIR_REC;
+	ch->run = 0;
+	ch->lvi = 0;
+	if (ichchan_initbuf(ch)) {
+		device_printf(sc->dev, "cannot allocate channel buffer\n");
+		free(ch, M_DEVBUF);
+		return NULL;
+	}
+	bus_space_write_4(sc->nabmbart, sc->nabmbarh, ICH_REG_PI_BDBAR,
+	    (u_int32_t)vtophys(ch->index));
+	sc->pi = ch;
+	if (bootverbose) {
+		device_printf(sc->dev,"Record codec support rate(Hz): ");
+		for (i = 0;ich_rate[i] != 0;i++) {
+			if (ichrchan_setspeed(obj, ch, ich_rate[i]) == ich_rate[i]) {
+				printf("%d ", ich_rate[i]);
+			}
+		}
+		printf("\n");
+	}
+	ich_reccaps.minspeed = ichrchan_getminspeed(obj, ch);
+	return ch;
+}
+
+static int
+ichrchan_free(kobj_t obj, void *data)
+{
+	struct sc_chinfo *ch = data;
+	ichchan_free(ch);
+	return ichrchan_power(obj, ch->parent, 0);
+}
+
+static int
+ichrchan_setformat(kobj_t obj, void *data, u_int32_t format)
+{
+	struct sc_chinfo *ch = data;
+
+	ch->fmt = format;
+
+	return 0;
+}
+
+static int
+ichrchan_setspeed(kobj_t obj, void *data, u_int32_t speed)
+{
+	struct sc_chinfo *ch = data;
+	u_int32_t extcap;
+
+	extcap = ac97_getextmode(ch->parent->codec);
+	if (extcap & AC97_EXTCAP_VRM) {
+		ch->spd = (u_int32_t)ac97_setrate(ch->parent->codec, AC97_REGEXT_LADCRATE, speed);
+	}
+	else {
+		ch->spd = 48000; /* before AC'97 R2.0 */
+	}
+
+	return ch->spd;
+}
+
+static int
+ichrchan_setblocksize(kobj_t obj, void *data, u_int32_t blocksize)
+{
+	return blocksize;
+}
+
+/* semantic note: must start at beginning of buffer */
+static int
+ichrchan_trigger(kobj_t obj, void *data, int go)
+{
+	struct sc_chinfo *ch = data;
+	struct sc_info *sc = ch->parent;
+	u_int32_t cr;
+	int i;
+
+	switch (go) {
+	case PCMTRIG_START:
+		ch->run = 1;
+		ichrchan_power(obj, sc, 1);
+		bus_space_write_4(sc->nabmbart, sc->nabmbarh, ICH_REG_PI_BDBAR,
+		    (u_int32_t)vtophys(ch->index));
+		ch->lvi = ICH_FIFOINDEX - 1;
+		bus_space_write_1(sc->nabmbart, sc->nabmbarh, ICH_REG_PI_LVI,
+		    ch->lvi);
+		bus_space_write_1(sc->nabmbart, sc->nabmbarh, ICH_REG_PI_CR,
+		    ICH_X_CR_RPBM | ICH_X_CR_LVBIE | ICH_X_CR_IOCE |
+		    ICH_X_CR_FEIE);
+		break;
+	case PCMTRIG_STOP:
+		cr = bus_space_read_1(sc->nabmbart, sc->nabmbarh,
+		    ICH_REG_PI_CR);
+		bus_space_write_1(sc->nabmbart, sc->nabmbarh, ICH_REG_PI_CR,
+		    cr & ~ICH_X_CR_RPBM);
+		ichrchan_power(obj, sc, 0);
+		ch->run = 0;
+		break;
+	case PCMTRIG_ABORT:
+		bus_space_write_1(sc->nabmbart, sc->nabmbarh, ICH_REG_PI_CR,
+		    0);
+		bus_space_write_1(sc->nabmbart, sc->nabmbarh, ICH_REG_PI_CR,
+		    ICH_X_CR_RR);
+		for (i = 0;i < ICH_TIMEOUT;i++) {
+			cr = bus_space_read_1(sc->nabmbart, sc->nabmbarh,
+			    ICH_REG_PI_CR);
+			if (cr == 0)
+				break;
+		}
+		ichrchan_power(obj, sc, 0);
+		ch->run = 0;
+		ch->lvi = 0;
+		break;
+	default:
+		break;
+	}
+	return 0;
+}
+
+static int
+ichrchan_getptr(kobj_t obj, void *data)
+{
+	struct sc_chinfo *ch = data;
+	struct sc_info *sc = ch->parent;
+	u_int32_t ci;
+
+	ci = bus_space_read_1(sc->nabmbart, sc->nabmbarh, ICH_REG_PI_CIV);
+	return ci * ICH_DEFAULT_BLOCKSZ;
+}
+
+static struct pcmchan_caps *
+ichrchan_getcaps(kobj_t obj, void *data)
+{
+	return &ich_reccaps;
+}
+
+static kobj_method_t ichrchan_methods[] = {
+	KOBJMETHOD(channel_init,		ichrchan_init),
+	KOBJMETHOD(channel_free,		ichrchan_free),
+	KOBJMETHOD(channel_setformat,		ichrchan_setformat),
+	KOBJMETHOD(channel_setspeed,		ichrchan_setspeed),
+	KOBJMETHOD(channel_setblocksize,	ichrchan_setblocksize),
+	KOBJMETHOD(channel_trigger,		ichrchan_trigger),
+	KOBJMETHOD(channel_getptr,		ichrchan_getptr),
+	KOBJMETHOD(channel_getcaps,		ichrchan_getcaps),
+	{ 0, 0 }
+};
+CHANNEL_DECLARE(ichrchan);
+
+/* -------------------------------------------------------------------- */
+/* The interrupt handler */
+static void
+ich_intr(void *p)
+{
+	struct sc_info *sc = (struct sc_info *)p;
+	struct sc_chinfo *ch;
+	u_int32_t cp;
+	u_int32_t sg;
+	u_int32_t st;
+	u_int32_t lvi = 0;
+
+#if(0)
+	device_printf(sc->dev, "ich_intr(0x%08x)\n", p);
+#endif
+	/* check interface status */
+	sg = bus_space_read_4(sc->nabmbart, sc->nabmbarh, ICH_REG_GLOB_STA);
+#if(0)
+	device_printf(sc->dev, "ich_intr():REG_GLOB_STA = 0x%08x\n", sg);
+#endif
+	if (sg & ICH_GLOB_STA_POINT) {
+		/* PCM Out INTerrupt */
+		/* mask interrupt */
+		cp = bus_space_read_1(sc->nabmbart, sc->nabmbarh,
+		    ICH_REG_PO_CR);
+		cp &= ~(ICH_X_CR_LVBIE | ICH_X_CR_IOCE | ICH_X_CR_FEIE);
+		bus_space_write_1(sc->nabmbart, sc->nabmbarh, ICH_REG_PO_CR,
+		    cp);
+		/* check channel status */
+		ch = sc->po;
+		st = bus_space_read_2(sc->nabmbart, sc->nabmbarh,
+		    ICH_REG_PO_SR);
+#if(0)
+		device_printf(sc->dev, "ich_intr():REG_PO_SR = 0x%02x\n", st);
+#endif
+		if (st & (ICH_X_SR_BCIS | ICH_X_SR_LVBCI)) {
+			/* play buffer block complete */
+			if (st & ICH_X_SR_LVBCI)
+				lvi = ch->lvi;
+			/* update buffer */
+			chn_intr(ch->channel);
+			ichpchan_update(ch);
+			if (st & ICH_X_SR_LVBCI) {
+				/* re-check underflow status */
+				if (lvi == ch->lvi) {
+					/* ch->buffer->underflow = 1; */
+					ichpchan_fillblank(ch);
+				}
+			}
+		}
+		/* clear status bit */
+		bus_space_write_2(sc->nabmbart, sc->nabmbarh, ICH_REG_PO_SR,
+		    st & (ICH_X_SR_FIFOE | ICH_X_SR_BCIS | ICH_X_SR_LVBCI));
+		/* set interrupt */
+		cp |= (ICH_X_CR_LVBIE | ICH_X_CR_IOCE | ICH_X_CR_FEIE);
+		bus_space_write_1(sc->nabmbart, sc->nabmbarh, ICH_REG_PO_CR,
+		    cp);
+	}
+	if (sg & ICH_GLOB_STA_PIINT) {
+		/* PCM In INTerrupt */
+		/* mask interrupt */
+		cp = bus_space_read_1(sc->nabmbart, sc->nabmbarh,
+		    ICH_REG_PI_CR);
+		cp &= ~(ICH_X_CR_LVBIE | ICH_X_CR_IOCE | ICH_X_CR_FEIE);
+		bus_space_write_1(sc->nabmbart, sc->nabmbarh, ICH_REG_PI_CR,
+		    cp);
+		/* check channel status */
+		ch = sc->pi;
+		st = bus_space_read_2(sc->nabmbart, sc->nabmbarh,
+		    ICH_REG_PI_SR);
+#if(0)
+		device_printf(sc->dev, "ich_intr():REG_PI_SR = 0x%02x\n", st);
+#endif
+		if (st & (ICH_X_SR_BCIS | ICH_X_SR_LVBCI)) {
+			/* record buffer block filled */
+			if (st & ICH_X_SR_LVBCI)
+				lvi = ch->lvi;
+			/* update space */
+			chn_intr(ch->channel);
+			ch->lvi = sndbuf_getreadyptr(ch->buffer) / ICH_DEFAULT_BLOCKSZ - 1;
+			if (ch->lvi < 0)
+				ch->lvi = ICH_FIFOINDEX - 1;
+			bus_space_write_1(sc->nabmbart, sc->nabmbarh,
+			    ICH_REG_PI_LVI, ch->lvi);
+			if (st & ICH_X_SR_LVBCI) {
+				/* re-check underflow status */
+				if (lvi == ch->lvi) {
+					ch->lvi++;
+					if (ch->lvi == ICH_FIFOINDEX)
+						ch->lvi = 0;
+					bus_space_write_1(sc->nabmbart,
+					    sc->nabmbarh, ICH_REG_PI_LVI,
+					    ch->lvi);
+				}
+			}
+		}
+		/* clear status bit */
+		bus_space_write_2(sc->nabmbart, sc->nabmbarh, ICH_REG_PI_SR,
+		    st & (ICH_X_SR_FIFOE | ICH_X_SR_BCIS | ICH_X_SR_LVBCI));
+		/* set interrupt */
+		cp |= (ICH_X_CR_LVBIE | ICH_X_CR_IOCE | ICH_X_CR_FEIE);
+		bus_space_write_1(sc->nabmbart, sc->nabmbarh, ICH_REG_PI_CR,
+		    cp);
+	}
+}
+
+/* -------------------------------------------------------------------- */
+
+/*
+ * Probe and attach the card
+ */
+
+static int
+ich_init(struct sc_info *sc)
+{
+	u_int32_t stat;
+	u_int32_t save;
+
+	bus_space_write_4(sc->nabmbart, sc->nabmbarh,
+	    ICH_REG_GLOB_CNT, ICH_GLOB_CTL_COLD);
+	DELAY(600000);
+	stat = bus_space_read_4(sc->nabmbart, sc->nabmbarh, ICH_REG_GLOB_STA);
+	if ((stat & ICH_GLOB_STA_PCR) == 0)
+		return -1;
+	bus_space_write_4(sc->nabmbart, sc->nabmbarh,
+	    ICH_REG_GLOB_CNT, ICH_GLOB_CTL_COLD | ICH_GLOB_CTL_PRES);
+	save = bus_space_read_2(sc->nambart, sc->nambarh, AC97_MIX_MASTER);
+	bus_space_write_2(sc->nambart, sc->nambarh, AC97_MIX_MASTER,
+			  AC97_MUTE);
+	if (ich_waitcd(sc) == ETIMEDOUT)
+		return -1;
+	DELAY(600); /* it is need for some system */
+	stat = bus_space_read_2(sc->nambart, sc->nambarh, AC97_MIX_MASTER);
+	if (stat != AC97_MUTE)
+		return -1;
+	bus_space_write_2(sc->nambart, sc->nambarh, AC97_MIX_MASTER, save);
+	return 0;
+}
+
+static int
+ich_finddev(u_int32_t dev, u_int32_t subdev)
+{
+	int i;
+
+	for (i = 0; ich_devs[i].dev; i++) {
+		if (ich_devs[i].dev == dev &&
+		    (ich_devs[i].subdev == subdev || ich_devs[i].subdev == 0))
+			return i;
+	}
+	return -1;
+}
+
+static int
+ich_pci_probe(device_t dev)
+{
+	int i;
+	u_int32_t subdev;
+
+	subdev = (pci_get_subdevice(dev) << 16) | pci_get_subvendor(dev);
+	i = ich_finddev(pci_get_devid(dev), subdev);
+	if (i >= 0) {
+		device_set_desc(dev, ich_devs[i].name);
+		return 0;
+	} else
+		return ENXIO;
+}
+
+static int
+ich_pci_attach(device_t dev)
+{
+	u_int32_t		data;
+	u_int32_t		subdev;
+	struct sc_info 		*sc;
+	char 			status[SND_STATUSLEN];
+
+	if ((sc = malloc(sizeof(*sc), M_DEVBUF, M_NOWAIT)) == NULL) {
+		device_printf(dev, "cannot allocate softc\n");
+		return ENXIO;
+	}
+
+	bzero(sc, sizeof(*sc));
+	sc->dev = dev;
+	subdev = (pci_get_subdevice(dev) << 16) | pci_get_subvendor(dev);
+	sc->type = ich_finddev(pci_get_devid(dev), subdev);
+	sc->rev = pci_get_revid(dev);
+
+	data = pci_read_config(dev, PCIR_COMMAND, 2);
+	data |= (PCIM_CMD_PORTEN | PCIM_CMD_MEMEN | PCIM_CMD_BUSMASTEREN);
+	pci_write_config(dev, PCIR_COMMAND, data, 2);
+	data = pci_read_config(dev, PCIR_COMMAND, 2);
+
+	sc->nambarid = PCIR_NAMBAR;
+	sc->nabmbarid = PCIR_NABMBAR;
+	sc->nambar = bus_alloc_resource(dev, SYS_RES_IOPORT,
+	    &sc->nambarid, 0, ~0, 256, RF_ACTIVE);
+	sc->nabmbar = bus_alloc_resource(dev, SYS_RES_IOPORT,
+	    &sc->nabmbarid, 0, ~0, 64, RF_ACTIVE);
+	if (!sc->nambar || !sc->nabmbar) {
+		device_printf(dev, "unable to map IO port space\n");
+		goto bad;
+	}
+	sc->nambart = rman_get_bustag(sc->nambar);
+	sc->nambarh = rman_get_bushandle(sc->nambar);
+	sc->nabmbart = rman_get_bustag(sc->nabmbar);
+	sc->nabmbarh = rman_get_bushandle(sc->nabmbar);
+
+	if (bus_dma_tag_create(/*parent*/NULL, /*alignment*/4, /*boundary*/0,
+	    /*lowaddr*/BUS_SPACE_MAXADDR_32BIT,
+	    /*highaddr*/BUS_SPACE_MAXADDR,
+	    /*filter*/NULL, /*filterarg*/NULL,
+	    /*maxsize*/65536, /*nsegments*/1, /*maxsegsz*/0x3ffff,
+	    /*flags*/0, &sc->dmat) != 0) {
+		device_printf(dev, "unable to create dma tag\n");
+		goto bad;
+	}
+
+	if (ich_init(sc) == -1) {
+		device_printf(dev, "unable to initialize the card\n");
+		goto bad;
+	}
+
+	sc->codec = AC97_CREATE(dev, sc, ich_ac97);
+	if (sc->codec == NULL)
+		goto bad;
+	mixer_init(dev, ac97_getmixerclass(), sc->codec);
+	/* check and set VRA function */
+	if (ac97_setextmode(sc->codec, AC97_EXTCAP_VRA) == 0) {
+		if (bootverbose) {
+			device_printf(sc->dev, "set VRA function\n");
+		}
+	}
+	if (ac97_setextmode(sc->codec, AC97_EXTCAP_VRM) == 0) {
+		if (bootverbose) {
+			device_printf(sc->dev, "set VRM function\n");
+		}
+	}
+
+	sc->irqid = 0;
+	sc->irq = bus_alloc_resource(dev, SYS_RES_IRQ, &sc->irqid,
+				 0, ~0, 1, RF_ACTIVE | RF_SHAREABLE);
+	if (!sc->irq ||
+	    bus_setup_intr(dev, sc->irq, INTR_TYPE_TTY, ich_intr, sc, &sc->ih)) {
+		device_printf(dev, "unable to map interrupt\n");
+		goto bad;
+	}
+
+	snprintf(status, SND_STATUSLEN,
+	    "at io 0x%lx-0x%lx, 0x%lx-0x%lx irq %ld",
+	    rman_get_start(sc->nambar), rman_get_end(sc->nambar),
+	    rman_get_start(sc->nabmbar), rman_get_end(sc->nabmbar),
+	    rman_get_start(sc->irq));
+
+	if (pcm_register(dev, sc, 1, 1))
+		goto bad;
+	pcm_addchan(dev, PCMDIR_PLAY, &ichpchan_class, sc);
+	pcm_addchan(dev, PCMDIR_REC, &ichrchan_class, sc);
+	pcm_setstatus(dev, status);
+
+	return 0;
+
+bad:
+	if (sc->codec)
+		ac97_destroy(sc->codec);
+	if (sc->nambar)
+		bus_release_resource(dev, SYS_RES_IOPORT,
+		    sc->nambarid, sc->nambar);
+	if (sc->nabmbar)
+		bus_release_resource(dev, SYS_RES_IOPORT,
+		    sc->nabmbarid, sc->nabmbar);
+	if (sc->ih)
+		bus_teardown_intr(dev, sc->irq, sc->ih);
+	if (sc->irq)
+		bus_release_resource(dev, SYS_RES_IRQ, sc->irqid, sc->irq);
+	free(sc, M_DEVBUF);
+	return ENXIO;
+}
+
+static int
+ich_pci_detach(device_t dev)
+{
+	struct sc_info *sc;
+	int r;
+
+	r = pcm_unregister(dev);
+	if (r)
+		return r;
+	sc = pcm_getdevinfo(dev);
+
+	bus_release_resource(dev, SYS_RES_IOPORT, sc->nambarid, sc->nambar);
+	bus_release_resource(dev, SYS_RES_IOPORT, sc->nabmbarid, sc->nabmbar);
+	bus_dma_tag_destroy(sc->dmat);
+	bus_teardown_intr(dev, sc->irq, sc->ih);
+	bus_release_resource(dev, SYS_RES_IRQ, sc->irqid, sc->irq);
+	free(sc, M_DEVBUF);
+	return 0;
+}
+
+static int
+ich_pci_resume(device_t dev)
+{
+	struct sc_info *sc;
+
+	sc = pcm_getdevinfo(dev);
+
+	/* Reinit audio device */
+    	if (ich_init(sc) == -1) {
+		device_printf(dev, "unable to reinitialize the card\n");
+		return ENXIO;
+	}
+	/* Reinit mixer */
+    	if (mixer_reinit(dev) == -1) {
+		device_printf(dev, "unable to reinitialize the mixer\n");
+		return ENXIO;
+	}
+	return 0;
+}
+
+static device_method_t ich_methods[] = {
+	/* Device interface */
+	DEVMETHOD(device_probe,		ich_pci_probe),
+	DEVMETHOD(device_attach,	ich_pci_attach),
+	DEVMETHOD(device_detach,	ich_pci_detach),
+	DEVMETHOD(device_resume,	ich_pci_resume),
+	{ 0, 0 }
+};
+
+static driver_t ich_driver = {
+	"pcm",
+	ich_methods,
+	sizeof(struct snddev_info),
+};
+
+DRIVER_MODULE(snd_ich, pci, ich_driver, pcm_devclass, 0, 0);
+MODULE_DEPEND(snd_ich, snd_pcm, PCM_MINVER, PCM_PREFVER, PCM_MAXVER);
+MODULE_VERSION(snd_ich, 1);
diff --git a/sys/modules/sound/driver/Makefile b/sys/modules/sound/driver/Makefile
index 694881b..dfd3e08 100644
--- a/sys/modules/sound/driver/Makefile
+++ b/sys/modules/sound/driver/Makefile
@@ -1,8 +1,8 @@
 # $FreeBSD$
 
-SUBDIR  = als4000 ad1816 cmi cs4281 csa csapcm ds1 emu10k1 es137x es1888 ess 
-SUBDIR += fm801 gusc maestro maestro3 mss neomagic sb16 sb8 sbc solo t4dwave
-SUBDIR += via82c686 vibes
+SUBDIR  = als4000 ad1816 cmi cs4281 csa csapcm ds1 emu10k1 es137x es1888 ess
+SUBDIR += fm801 gusc ich maestro maestro3 mss neomagic sb16 sb8 sbc solo
+SUBDIR += t4dwave via82c686 vibes
 SUBDIR += driver
 
 .include <bsd.subdir.mk>
diff --git a/sys/modules/sound/driver/ich/Makefile b/sys/modules/sound/driver/ich/Makefile
new file mode 100755
index 0000000..4ec9fce
--- /dev/null
+++ b/sys/modules/sound/driver/ich/Makefile
@@ -0,0 +1,8 @@
+# $FreeBSD$
+
+.PATH:		${.CURDIR}/../../../../dev/sound/pci
+KMOD		= snd_ich
+SRCS		= device_if.h bus_if.h isa_if.h pci_if.h
+SRCS		+= ich.c
+
+.include <bsd.kmod.mk>