Adding upstream version 5.10.209.upstream/5.10.209upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 2232 insertions, 0 deletions

diff --git a/sound/pci/ali5451/ali5451.c b/sound/pci/ali5451/ali5451.c
new file mode 100644
index 000000000..4462375d2
--- /dev/null
+++ b/sound/pci/ali5451/ali5451.c
@@ -0,0 +1,2232 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ *  Matt Wu <Matt_Wu@acersoftech.com.cn>
+ *  Apr 26, 2001
+ *  Routines for control of ALi pci audio M5451
+ *
+ *  BUGS:
+ *    --
+ *
+ *  TODO:
+ *    --
+ */
+
+#include <linux/io.h>
+#include <linux/delay.h>
+#include <linux/interrupt.h>
+#include <linux/init.h>
+#include <linux/pci.h>
+#include <linux/slab.h>
+#include <linux/module.h>
+#include <linux/dma-mapping.h>
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/info.h>
+#include <sound/ac97_codec.h>
+#include <sound/mpu401.h>
+#include <sound/initval.h>
+
+MODULE_AUTHOR("Matt Wu <Matt_Wu@acersoftech.com.cn>");
+MODULE_DESCRIPTION("ALI M5451");
+MODULE_LICENSE("GPL");
+MODULE_SUPPORTED_DEVICE("{{ALI,M5451,pci},{ALI,M5451}}");
+
+static int index = SNDRV_DEFAULT_IDX1;	/* Index */
+static char *id = SNDRV_DEFAULT_STR1;	/* ID for this card */
+static int pcm_channels = 32;
+static bool spdif;
+
+module_param(index, int, 0444);
+MODULE_PARM_DESC(index, "Index value for ALI M5451 PCI Audio.");
+module_param(id, charp, 0444);
+MODULE_PARM_DESC(id, "ID string for ALI M5451 PCI Audio.");
+module_param(pcm_channels, int, 0444);
+MODULE_PARM_DESC(pcm_channels, "PCM Channels");
+module_param(spdif, bool, 0444);
+MODULE_PARM_DESC(spdif, "Support SPDIF I/O");
+
+/* just for backward compatibility */
+static bool enable;
+module_param(enable, bool, 0444);
+
+
+/*
+ *  Constants definition
+ */
+
+#define DEVICE_ID_ALI5451	((PCI_VENDOR_ID_AL<<16)|PCI_DEVICE_ID_AL_M5451)
+
+
+#define ALI_CHANNELS		32
+
+#define ALI_PCM_IN_CHANNEL	31
+#define ALI_SPDIF_IN_CHANNEL	19
+#define ALI_SPDIF_OUT_CHANNEL	15
+#define ALI_CENTER_CHANNEL	24
+#define ALI_LEF_CHANNEL		23
+#define ALI_SURR_LEFT_CHANNEL	26
+#define ALI_SURR_RIGHT_CHANNEL	25
+#define ALI_MODEM_IN_CHANNEL    21
+#define ALI_MODEM_OUT_CHANNEL   20
+
+#define	SNDRV_ALI_VOICE_TYPE_PCM	01
+#define SNDRV_ALI_VOICE_TYPE_OTH	02
+
+#define	ALI_5451_V02		0x02
+
+/*
+ *  Direct Registers
+ */
+
+#define ALI_LEGACY_DMAR0        0x00  /* ADR0 */
+#define ALI_LEGACY_DMAR4        0x04  /* CNT0 */
+#define ALI_LEGACY_DMAR11       0x0b  /* MOD  */
+#define ALI_LEGACY_DMAR15       0x0f  /* MMR  */
+#define ALI_MPUR0		0x20
+#define ALI_MPUR1		0x21
+#define ALI_MPUR2		0x22
+#define ALI_MPUR3		0x23
+
+#define	ALI_AC97_WRITE		0x40
+#define ALI_AC97_READ		0x44
+
+#define ALI_SCTRL		0x48
+#define   ALI_SPDIF_OUT_ENABLE		0x20
+#define   ALI_SCTRL_LINE_IN2		(1 << 9)
+#define   ALI_SCTRL_GPIO_IN2		(1 << 13)
+#define   ALI_SCTRL_LINE_OUT_EN 	(1 << 20)
+#define   ALI_SCTRL_GPIO_OUT_EN 	(1 << 23)
+#define   ALI_SCTRL_CODEC1_READY	(1 << 24)
+#define   ALI_SCTRL_CODEC2_READY	(1 << 25)
+#define ALI_AC97_GPIO		0x4c
+#define   ALI_AC97_GPIO_ENABLE		0x8000
+#define   ALI_AC97_GPIO_DATA_SHIFT	16
+#define ALI_SPDIF_CS		0x70
+#define ALI_SPDIF_CTRL		0x74
+#define   ALI_SPDIF_IN_FUNC_ENABLE	0x02
+#define   ALI_SPDIF_IN_CH_STATUS	0x40
+#define   ALI_SPDIF_OUT_CH_STATUS	0xbf
+#define ALI_START		0x80
+#define ALI_STOP		0x84
+#define ALI_CSPF		0x90
+#define ALI_AINT		0x98
+#define ALI_GC_CIR		0xa0
+	#define ENDLP_IE		0x00001000
+	#define MIDLP_IE		0x00002000
+#define ALI_AINTEN		0xa4
+#define ALI_VOLUME		0xa8
+#define ALI_SBDELTA_DELTA_R     0xac
+#define ALI_MISCINT		0xb0
+	#define ADDRESS_IRQ		0x00000020
+	#define TARGET_REACHED		0x00008000
+	#define MIXER_OVERFLOW		0x00000800
+	#define MIXER_UNDERFLOW		0x00000400
+	#define GPIO_IRQ		0x01000000
+#define ALI_SBBL_SBCL           0xc0
+#define ALI_SBCTRL_SBE2R_SBDD   0xc4
+#define ALI_STIMER		0xc8
+#define ALI_GLOBAL_CONTROL	0xd4
+#define   ALI_SPDIF_OUT_SEL_PCM		0x00000400 /* bit 10 */
+#define   ALI_SPDIF_IN_SUPPORT		0x00000800 /* bit 11 */
+#define   ALI_SPDIF_OUT_CH_ENABLE	0x00008000 /* bit 15 */
+#define   ALI_SPDIF_IN_CH_ENABLE	0x00080000 /* bit 19 */
+#define   ALI_PCM_IN_ENABLE		0x80000000 /* bit 31 */
+
+#define ALI_CSO_ALPHA_FMS	0xe0
+#define ALI_LBA			0xe4
+#define ALI_ESO_DELTA		0xe8
+#define ALI_GVSEL_PAN_VOC_CTRL_EC	0xf0
+#define ALI_EBUF1		0xf4
+#define ALI_EBUF2		0xf8
+
+#define ALI_REG(codec, x) ((codec)->port + x)
+
+#define MAX_CODECS 2
+
+
+struct snd_ali;
+struct snd_ali_voice;
+
+struct snd_ali_channel_control {
+	/* register data */
+	struct REGDATA {
+		unsigned int start;
+		unsigned int stop;
+		unsigned int aint;
+		unsigned int ainten;
+	} data;
+		
+	/* register addresses */
+	struct REGS {
+		unsigned int start;
+		unsigned int stop;
+		unsigned int aint;
+		unsigned int ainten;
+		unsigned int ac97read;
+		unsigned int ac97write;
+	} regs;
+
+};
+
+struct snd_ali_voice {
+	unsigned int number;
+	unsigned int use :1,
+		pcm :1,
+		midi :1,
+		mode :1,
+		synth :1,
+		running :1;
+
+	/* PCM data */
+	struct snd_ali *codec;
+	struct snd_pcm_substream *substream;
+	struct snd_ali_voice *extra;
+	
+	int eso;                /* final ESO value for channel */
+	int count;              /* runtime->period_size */
+
+	/* --- */
+
+	void *private_data;
+	void (*private_free)(void *private_data);
+};
+
+
+struct snd_alidev {
+
+	struct snd_ali_voice voices[ALI_CHANNELS];	
+
+	unsigned int	chcnt;			/* num of opened channels */
+	unsigned int	chmap;			/* bitmap for opened channels */
+	unsigned int synthcount;
+
+};
+
+
+#define ALI_GLOBAL_REGS		56
+#define ALI_CHANNEL_REGS	8
+struct snd_ali_image {
+	u32 regs[ALI_GLOBAL_REGS];
+	u32 channel_regs[ALI_CHANNELS][ALI_CHANNEL_REGS];
+};
+
+
+struct snd_ali {
+	int		irq;
+	unsigned long	port;
+	unsigned char	revision;
+
+	unsigned int hw_initialized :1;
+	unsigned int spdif_support :1;
+
+	struct pci_dev	*pci;
+	struct pci_dev	*pci_m1533;
+	struct pci_dev	*pci_m7101;
+
+	struct snd_card	*card;
+	struct snd_pcm	*pcm[MAX_CODECS];
+	struct snd_alidev	synth;
+	struct snd_ali_channel_control chregs;
+
+	/* S/PDIF Mask */
+	unsigned int	spdif_mask;
+
+	unsigned int spurious_irq_count;
+	unsigned int spurious_irq_max_delta;
+
+	unsigned int num_of_codecs;
+
+	struct snd_ac97_bus *ac97_bus;
+	struct snd_ac97 *ac97[MAX_CODECS];
+	unsigned short	ac97_ext_id;
+	unsigned short	ac97_ext_status;
+
+	spinlock_t	reg_lock;
+	spinlock_t	voice_alloc;
+
+#ifdef CONFIG_PM_SLEEP
+	struct snd_ali_image *image;
+#endif
+};
+
+static const struct pci_device_id snd_ali_ids[] = {
+	{PCI_DEVICE(PCI_VENDOR_ID_AL, PCI_DEVICE_ID_AL_M5451), 0, 0, 0},
+	{0, }
+};
+MODULE_DEVICE_TABLE(pci, snd_ali_ids);
+
+static void snd_ali_clear_voices(struct snd_ali *, unsigned int, unsigned int);
+static unsigned short snd_ali_codec_peek(struct snd_ali *, int, unsigned short);
+static void snd_ali_codec_poke(struct snd_ali *, int, unsigned short,
+			       unsigned short);
+
+/*
+ *  AC97 ACCESS
+ */
+
+static inline unsigned int snd_ali_5451_peek(struct snd_ali *codec,
+					     unsigned int port)
+{
+	return (unsigned int)inl(ALI_REG(codec, port)); 
+}
+
+static inline void snd_ali_5451_poke(struct snd_ali *codec,
+				     unsigned int port,
+				     unsigned int val)
+{
+	outl((unsigned int)val, ALI_REG(codec, port));
+}
+
+static int snd_ali_codec_ready(struct snd_ali *codec,
+			       unsigned int port)
+{
+	unsigned long end_time;
+	unsigned int res;
+	
+	end_time = jiffies + msecs_to_jiffies(250);
+
+	for (;;) {
+		res = snd_ali_5451_peek(codec,port);
+		if (!(res & 0x8000))
+			return 0;
+		if (!time_after_eq(end_time, jiffies))
+			break;
+		schedule_timeout_uninterruptible(1);
+	}
+
+	snd_ali_5451_poke(codec, port, res & ~0x8000);
+	dev_dbg(codec->card->dev, "ali_codec_ready: codec is not ready.\n ");
+	return -EIO;
+}
+
+static int snd_ali_stimer_ready(struct snd_ali *codec)
+{
+	unsigned long end_time;
+	unsigned long dwChk1,dwChk2;
+	
+	dwChk1 = snd_ali_5451_peek(codec, ALI_STIMER);
+	end_time = jiffies + msecs_to_jiffies(250);
+
+	for (;;) {
+		dwChk2 = snd_ali_5451_peek(codec, ALI_STIMER);
+		if (dwChk2 != dwChk1)
+			return 0;
+		if (!time_after_eq(end_time, jiffies))
+			break;
+		schedule_timeout_uninterruptible(1);
+	}
+
+	dev_err(codec->card->dev, "ali_stimer_read: stimer is not ready.\n");
+	return -EIO;
+}
+
+static void snd_ali_codec_poke(struct snd_ali *codec,int secondary,
+			       unsigned short reg,
+			       unsigned short val)
+{
+	unsigned int dwVal;
+	unsigned int port;
+
+	if (reg >= 0x80) {
+		dev_err(codec->card->dev,
+			"ali_codec_poke: reg(%xh) invalid.\n", reg);
+		return;
+	}
+
+	port = codec->chregs.regs.ac97write;
+
+	if (snd_ali_codec_ready(codec, port) < 0)
+		return;
+	if (snd_ali_stimer_ready(codec) < 0)
+		return;
+
+	dwVal  = (unsigned int) (reg & 0xff);
+	dwVal |= 0x8000 | (val << 16);
+	if (secondary)
+		dwVal |= 0x0080;
+	if (codec->revision == ALI_5451_V02)
+		dwVal |= 0x0100;
+
+	snd_ali_5451_poke(codec, port, dwVal);
+
+	return ;
+}
+
+static unsigned short snd_ali_codec_peek(struct snd_ali *codec,
+					 int secondary,
+					 unsigned short reg)
+{
+	unsigned int dwVal;
+	unsigned int port;
+
+	if (reg >= 0x80) {
+		dev_err(codec->card->dev,
+			"ali_codec_peek: reg(%xh) invalid.\n", reg);
+		return ~0;
+	}
+
+	port = codec->chregs.regs.ac97read;
+
+	if (snd_ali_codec_ready(codec, port) < 0)
+		return ~0;
+	if (snd_ali_stimer_ready(codec) < 0)
+		return ~0;
+
+	dwVal  = (unsigned int) (reg & 0xff);
+	dwVal |= 0x8000;				/* bit 15*/
+	if (secondary)
+		dwVal |= 0x0080;
+
+	snd_ali_5451_poke(codec, port, dwVal);
+
+	if (snd_ali_stimer_ready(codec) < 0)
+		return ~0;
+	if (snd_ali_codec_ready(codec, port) < 0)
+		return ~0;
+	
+	return (snd_ali_5451_peek(codec, port) & 0xffff0000) >> 16;
+}
+
+static void snd_ali_codec_write(struct snd_ac97 *ac97,
+				unsigned short reg,
+				unsigned short val )
+{
+	struct snd_ali *codec = ac97->private_data;
+
+	dev_dbg(codec->card->dev, "codec_write: reg=%xh data=%xh.\n", reg, val);
+	if (reg == AC97_GPIO_STATUS) {
+		outl((val << ALI_AC97_GPIO_DATA_SHIFT) | ALI_AC97_GPIO_ENABLE,
+		     ALI_REG(codec, ALI_AC97_GPIO));
+		return;
+	}
+	snd_ali_codec_poke(codec, ac97->num, reg, val);
+	return ;
+}
+
+
+static unsigned short snd_ali_codec_read(struct snd_ac97 *ac97,
+					 unsigned short reg)
+{
+	struct snd_ali *codec = ac97->private_data;
+
+	dev_dbg(codec->card->dev, "codec_read reg=%xh.\n", reg);
+	return snd_ali_codec_peek(codec, ac97->num, reg);
+}
+
+/*
+ *	AC97 Reset
+ */
+
+static int snd_ali_reset_5451(struct snd_ali *codec)
+{
+	struct pci_dev *pci_dev;
+	unsigned short wCount, wReg;
+	unsigned int   dwVal;
+	
+	pci_dev = codec->pci_m1533;
+	if (pci_dev) {
+		pci_read_config_dword(pci_dev, 0x7c, &dwVal);
+		pci_write_config_dword(pci_dev, 0x7c, dwVal | 0x08000000);
+		mdelay(5);
+		pci_read_config_dword(pci_dev, 0x7c, &dwVal);
+		pci_write_config_dword(pci_dev, 0x7c, dwVal & 0xf7ffffff);
+		mdelay(5);
+	}
+	
+	pci_dev = codec->pci;
+	pci_read_config_dword(pci_dev, 0x44, &dwVal);
+	pci_write_config_dword(pci_dev, 0x44, dwVal | 0x000c0000);
+	udelay(500);
+	pci_read_config_dword(pci_dev, 0x44, &dwVal);
+	pci_write_config_dword(pci_dev, 0x44, dwVal & 0xfffbffff);
+	mdelay(5);
+	
+	wCount = 200;
+	while(wCount--) {
+		wReg = snd_ali_codec_peek(codec, 0, AC97_POWERDOWN);
+		if ((wReg & 0x000f) == 0x000f)
+			return 0;
+		mdelay(5);
+	}
+
+	/* non-fatal if you have a non PM capable codec */
+	/* dev_warn(codec->card->dev, "ali5451: reset time out\n"); */
+	return 0;
+}
+
+/*
+ *  ALI 5451 Controller
+ */
+
+static void snd_ali_enable_special_channel(struct snd_ali *codec,
+					   unsigned int channel)
+{
+	unsigned long dwVal;
+
+	dwVal  = inl(ALI_REG(codec, ALI_GLOBAL_CONTROL));
+	dwVal |= 1 << (channel & 0x0000001f);
+	outl(dwVal, ALI_REG(codec, ALI_GLOBAL_CONTROL));
+}
+
+static void snd_ali_disable_special_channel(struct snd_ali *codec,
+					    unsigned int channel)
+{
+	unsigned long dwVal;
+
+	dwVal  = inl(ALI_REG(codec, ALI_GLOBAL_CONTROL));
+	dwVal &= ~(1 << (channel & 0x0000001f));
+	outl(dwVal, ALI_REG(codec, ALI_GLOBAL_CONTROL));
+}
+
+static void snd_ali_enable_address_interrupt(struct snd_ali *codec)
+{
+	unsigned int gc;
+
+	gc  = inl(ALI_REG(codec, ALI_GC_CIR));
+	gc |= ENDLP_IE;
+	gc |= MIDLP_IE;
+	outl( gc, ALI_REG(codec, ALI_GC_CIR));
+}
+
+static void snd_ali_disable_address_interrupt(struct snd_ali *codec)
+{
+	unsigned int gc;
+
+	gc  = inl(ALI_REG(codec, ALI_GC_CIR));
+	gc &= ~ENDLP_IE;
+	gc &= ~MIDLP_IE;
+	outl(gc, ALI_REG(codec, ALI_GC_CIR));
+}
+
+static void snd_ali_disable_voice_irq(struct snd_ali *codec,
+				      unsigned int channel)
+{
+	unsigned int mask;
+	struct snd_ali_channel_control *pchregs = &(codec->chregs);
+
+	dev_dbg(codec->card->dev, "disable_voice_irq channel=%d\n", channel);
+
+	mask = 1 << (channel & 0x1f);
+	pchregs->data.ainten  = inl(ALI_REG(codec, pchregs->regs.ainten));
+	pchregs->data.ainten &= ~mask;
+	outl(pchregs->data.ainten, ALI_REG(codec, pchregs->regs.ainten));
+}
+
+static int snd_ali_alloc_pcm_channel(struct snd_ali *codec, int channel)
+{
+	unsigned int idx =  channel & 0x1f;
+
+	if (codec->synth.chcnt >= ALI_CHANNELS){
+		dev_err(codec->card->dev,
+			   "ali_alloc_pcm_channel: no free channels.\n");
+		return -1;
+	}
+
+	if (!(codec->synth.chmap & (1 << idx))) {
+		codec->synth.chmap |= 1 << idx;
+		codec->synth.chcnt++;
+		dev_dbg(codec->card->dev, "alloc_pcm_channel no. %d.\n", idx);
+		return idx;
+	}
+	return -1;
+}
+
+static int snd_ali_find_free_channel(struct snd_ali * codec, int rec)
+{
+	int idx;
+	int result = -1;
+
+	dev_dbg(codec->card->dev,
+		"find_free_channel: for %s\n", rec ? "rec" : "pcm");
+
+	/* recording */
+	if (rec) {
+		if (codec->spdif_support &&
+		    (inl(ALI_REG(codec, ALI_GLOBAL_CONTROL)) &
+		     ALI_SPDIF_IN_SUPPORT))
+			idx = ALI_SPDIF_IN_CHANNEL;
+		else
+			idx = ALI_PCM_IN_CHANNEL;
+
+		result = snd_ali_alloc_pcm_channel(codec, idx);
+		if (result >= 0)
+			return result;
+		else {
+			dev_err(codec->card->dev,
+				"ali_find_free_channel: record channel is busy now.\n");
+			return -1;
+		}
+	}
+
+	/* playback... */
+	if (codec->spdif_support &&
+	    (inl(ALI_REG(codec, ALI_GLOBAL_CONTROL)) &
+	     ALI_SPDIF_OUT_CH_ENABLE)) {
+		idx = ALI_SPDIF_OUT_CHANNEL;
+		result = snd_ali_alloc_pcm_channel(codec, idx);
+		if (result >= 0)
+			return result;
+		else
+			dev_err(codec->card->dev,
+				"ali_find_free_channel: S/PDIF out channel is in busy now.\n");
+	}
+
+	for (idx = 0; idx < ALI_CHANNELS; idx++) {
+		result = snd_ali_alloc_pcm_channel(codec, idx);
+		if (result >= 0)
+			return result;
+	}
+	dev_err(codec->card->dev, "ali_find_free_channel: no free channels.\n");
+	return -1;
+}
+
+static void snd_ali_free_channel_pcm(struct snd_ali *codec, int channel)
+{
+	unsigned int idx = channel & 0x0000001f;
+
+	dev_dbg(codec->card->dev, "free_channel_pcm channel=%d\n", channel);
+
+	if (channel < 0 || channel >= ALI_CHANNELS)
+		return;
+
+	if (!(codec->synth.chmap & (1 << idx))) {
+		dev_err(codec->card->dev,
+			"ali_free_channel_pcm: channel %d is not in use.\n",
+			channel);
+		return;
+	} else {
+		codec->synth.chmap &= ~(1 << idx);
+		codec->synth.chcnt--;
+	}
+}
+
+static void snd_ali_stop_voice(struct snd_ali *codec, unsigned int channel)
+{
+	unsigned int mask = 1 << (channel & 0x1f);
+
+	dev_dbg(codec->card->dev, "stop_voice: channel=%d\n", channel);
+	outl(mask, ALI_REG(codec, codec->chregs.regs.stop));
+}
+
+/*
+ *    S/PDIF Part
+ */
+
+static void snd_ali_delay(struct snd_ali *codec,int interval)
+{
+	unsigned long  begintimer,currenttimer;
+
+	begintimer   = inl(ALI_REG(codec, ALI_STIMER));
+	currenttimer = inl(ALI_REG(codec, ALI_STIMER));
+
+	while (currenttimer < begintimer + interval) {
+		if (snd_ali_stimer_ready(codec) < 0)
+			break;
+		currenttimer = inl(ALI_REG(codec,  ALI_STIMER));
+		cpu_relax();
+	}
+}
+
+static void snd_ali_detect_spdif_rate(struct snd_ali *codec)
+{
+	u16 wval;
+	u16 count = 0;
+	u8  bval, R1 = 0, R2;
+
+	bval  = inb(ALI_REG(codec, ALI_SPDIF_CTRL + 1));
+	bval |= 0x1F;
+	outb(bval, ALI_REG(codec, ALI_SPDIF_CTRL + 1));
+
+	while ((R1 < 0x0b || R1 > 0x0e) && R1 != 0x12 && count <= 50000) {
+		count ++;
+		snd_ali_delay(codec, 6);
+		bval = inb(ALI_REG(codec, ALI_SPDIF_CTRL + 1));
+		R1 = bval & 0x1F;
+	}
+
+	if (count > 50000) {
+		dev_err(codec->card->dev, "ali_detect_spdif_rate: timeout!\n");
+		return;
+	}
+
+	for (count = 0; count <= 50000; count++) {
+		snd_ali_delay(codec, 6);
+		bval = inb(ALI_REG(codec,ALI_SPDIF_CTRL + 1));
+		R2 = bval & 0x1F;
+		if (R2 != R1)
+			R1 = R2;
+		else
+			break;
+	}
+
+	if (count > 50000) {
+		dev_err(codec->card->dev, "ali_detect_spdif_rate: timeout!\n");
+		return;
+	}
+
+	if (R2 >= 0x0b && R2 <= 0x0e) {
+		wval  = inw(ALI_REG(codec, ALI_SPDIF_CTRL + 2));
+		wval &= 0xe0f0;
+		wval |= (0x09 << 8) | 0x05;
+		outw(wval, ALI_REG(codec, ALI_SPDIF_CTRL + 2));
+
+		bval  = inb(ALI_REG(codec, ALI_SPDIF_CS + 3)) & 0xf0;
+		outb(bval | 0x02, ALI_REG(codec, ALI_SPDIF_CS + 3));
+	} else if (R2 == 0x12) {
+		wval  = inw(ALI_REG(codec, ALI_SPDIF_CTRL + 2));
+		wval &= 0xe0f0;
+		wval |= (0x0e << 8) | 0x08;
+		outw(wval, ALI_REG(codec, ALI_SPDIF_CTRL + 2));
+
+		bval  = inb(ALI_REG(codec,ALI_SPDIF_CS + 3)) & 0xf0;
+		outb(bval | 0x03, ALI_REG(codec, ALI_SPDIF_CS + 3));
+	}
+}
+
+static unsigned int snd_ali_get_spdif_in_rate(struct snd_ali *codec)
+{
+	u32	dwRate;
+	u8	bval;
+
+	bval  = inb(ALI_REG(codec, ALI_SPDIF_CTRL));
+	bval &= 0x7f;
+	bval |= 0x40;
+	outb(bval, ALI_REG(codec, ALI_SPDIF_CTRL));
+
+	snd_ali_detect_spdif_rate(codec);
+
+	bval  = inb(ALI_REG(codec, ALI_SPDIF_CS + 3));
+	bval &= 0x0f;
+
+	switch (bval) {
+	case 0: dwRate = 44100; break;
+	case 1: dwRate = 48000; break;
+	case 2: dwRate = 32000; break;
+	default: dwRate = 0; break;
+	}
+
+	return dwRate;
+}
+
+static void snd_ali_enable_spdif_in(struct snd_ali *codec)
+{	
+	unsigned int dwVal;
+
+	dwVal = inl(ALI_REG(codec, ALI_GLOBAL_CONTROL));
+	dwVal |= ALI_SPDIF_IN_SUPPORT;
+	outl(dwVal, ALI_REG(codec, ALI_GLOBAL_CONTROL));
+
+	dwVal = inb(ALI_REG(codec, ALI_SPDIF_CTRL));
+	dwVal |= 0x02;
+	outb(dwVal, ALI_REG(codec, ALI_SPDIF_CTRL));
+
+	snd_ali_enable_special_channel(codec, ALI_SPDIF_IN_CHANNEL);
+}
+
+static void snd_ali_disable_spdif_in(struct snd_ali *codec)
+{
+	unsigned int dwVal;
+	
+	dwVal = inl(ALI_REG(codec, ALI_GLOBAL_CONTROL));
+	dwVal &= ~ALI_SPDIF_IN_SUPPORT;
+	outl(dwVal, ALI_REG(codec, ALI_GLOBAL_CONTROL));
+	
+	snd_ali_disable_special_channel(codec, ALI_SPDIF_IN_CHANNEL);	
+}
+
+
+static void snd_ali_set_spdif_out_rate(struct snd_ali *codec, unsigned int rate)
+{
+	unsigned char  bVal;
+	unsigned int  dwRate;
+	
+	switch (rate) {
+	case 32000: dwRate = 0x300; break;
+	case 48000: dwRate = 0x200; break;
+	default: dwRate = 0; break;
+	}
+	
+	bVal  = inb(ALI_REG(codec, ALI_SPDIF_CTRL));
+	bVal &= (unsigned char)(~(1<<6));
+	
+	bVal |= 0x80;		/* select right */
+	outb(bVal, ALI_REG(codec, ALI_SPDIF_CTRL));
+	outb(dwRate | 0x20, ALI_REG(codec, ALI_SPDIF_CS + 2));
+	
+	bVal &= ~0x80;	/* select left */
+	outb(bVal, ALI_REG(codec, ALI_SPDIF_CTRL));
+	outw(rate | 0x10, ALI_REG(codec, ALI_SPDIF_CS + 2));
+}
+
+static void snd_ali_enable_spdif_out(struct snd_ali *codec)
+{
+	unsigned short wVal;
+	unsigned char bVal;
+        struct pci_dev *pci_dev;
+
+        pci_dev = codec->pci_m1533;
+        if (pci_dev == NULL)
+                return;
+        pci_read_config_byte(pci_dev, 0x61, &bVal);
+        bVal |= 0x40;
+        pci_write_config_byte(pci_dev, 0x61, bVal);
+        pci_read_config_byte(pci_dev, 0x7d, &bVal);
+        bVal |= 0x01;
+        pci_write_config_byte(pci_dev, 0x7d, bVal);
+
+        pci_read_config_byte(pci_dev, 0x7e, &bVal);
+        bVal &= (~0x20);
+        bVal |= 0x10;
+        pci_write_config_byte(pci_dev, 0x7e, bVal);
+
+	bVal = inb(ALI_REG(codec, ALI_SCTRL));
+	outb(bVal | ALI_SPDIF_OUT_ENABLE, ALI_REG(codec, ALI_SCTRL));
+
+	bVal = inb(ALI_REG(codec, ALI_SPDIF_CTRL));
+	outb(bVal & ALI_SPDIF_OUT_CH_STATUS, ALI_REG(codec, ALI_SPDIF_CTRL));
+   
+	wVal = inw(ALI_REG(codec, ALI_GLOBAL_CONTROL));
+	wVal |= ALI_SPDIF_OUT_SEL_PCM;
+	outw(wVal, ALI_REG(codec, ALI_GLOBAL_CONTROL));
+	snd_ali_disable_special_channel(codec, ALI_SPDIF_OUT_CHANNEL);
+}
+
+static void snd_ali_enable_spdif_chnout(struct snd_ali *codec)
+{
+	unsigned short wVal;
+
+	wVal  = inw(ALI_REG(codec, ALI_GLOBAL_CONTROL));
+   	wVal &= ~ALI_SPDIF_OUT_SEL_PCM;
+   	outw(wVal, ALI_REG(codec, ALI_GLOBAL_CONTROL));
+/*
+	wVal = inw(ALI_REG(codec, ALI_SPDIF_CS));
+	if (flag & ALI_SPDIF_OUT_NON_PCM)
+   		wVal |= 0x0002;
+	else	
+		wVal &= (~0x0002);
+   	outw(wVal, ALI_REG(codec, ALI_SPDIF_CS));
+*/
+	snd_ali_enable_special_channel(codec, ALI_SPDIF_OUT_CHANNEL);
+}
+
+static void snd_ali_disable_spdif_chnout(struct snd_ali *codec)
+{
+	unsigned short wVal;
+
+  	wVal  = inw(ALI_REG(codec, ALI_GLOBAL_CONTROL));
+   	wVal |= ALI_SPDIF_OUT_SEL_PCM;
+   	outw(wVal, ALI_REG(codec, ALI_GLOBAL_CONTROL));
+
+	snd_ali_enable_special_channel(codec, ALI_SPDIF_OUT_CHANNEL);
+}
+
+static void snd_ali_disable_spdif_out(struct snd_ali *codec)
+{
+	unsigned char  bVal;
+
+	bVal = inb(ALI_REG(codec, ALI_SCTRL));
+	outb(bVal & ~ALI_SPDIF_OUT_ENABLE, ALI_REG(codec, ALI_SCTRL));
+
+	snd_ali_disable_spdif_chnout(codec);
+}
+
+static void snd_ali_update_ptr(struct snd_ali *codec, int channel)
+{
+	struct snd_ali_voice *pvoice;
+	struct snd_ali_channel_control *pchregs;
+	unsigned int old, mask;
+
+	pchregs = &(codec->chregs);
+
+	/* check if interrupt occurred for channel */
+	old  = pchregs->data.aint;
+	mask = 1U << (channel & 0x1f);
+
+	if (!(old & mask))
+		return;
+
+	pvoice = &codec->synth.voices[channel];
+
+	udelay(100);
+	spin_lock(&codec->reg_lock);
+
+	if (pvoice->pcm && pvoice->substream) {
+		/* pcm interrupt */
+		if (pvoice->running) {
+			dev_dbg(codec->card->dev,
+				"update_ptr: cso=%4.4x cspf=%d.\n",
+				inw(ALI_REG(codec, ALI_CSO_ALPHA_FMS + 2)),
+				(inl(ALI_REG(codec, ALI_CSPF)) & mask) == mask);
+			spin_unlock(&codec->reg_lock);
+			snd_pcm_period_elapsed(pvoice->substream);
+			spin_lock(&codec->reg_lock);
+		} else {
+			snd_ali_stop_voice(codec, channel);
+			snd_ali_disable_voice_irq(codec, channel);
+		}	
+	} else if (codec->synth.voices[channel].synth) {
+		/* synth interrupt */
+	} else if (codec->synth.voices[channel].midi) {
+		/* midi interrupt */
+	} else {
+		/* unknown interrupt */
+		snd_ali_stop_voice(codec, channel);
+		snd_ali_disable_voice_irq(codec, channel);
+	}
+	spin_unlock(&codec->reg_lock);
+	outl(mask,ALI_REG(codec,pchregs->regs.aint));
+	pchregs->data.aint = old & (~mask);
+}
+
+static irqreturn_t snd_ali_card_interrupt(int irq, void *dev_id)
+{
+	struct snd_ali 	*codec = dev_id;
+	int channel;
+	unsigned int audio_int;
+	struct snd_ali_channel_control *pchregs;
+
+	if (codec == NULL || !codec->hw_initialized)
+		return IRQ_NONE;
+
+	audio_int = inl(ALI_REG(codec, ALI_MISCINT));
+	if (!audio_int)
+		return IRQ_NONE;
+
+	pchregs = &(codec->chregs);
+	if (audio_int & ADDRESS_IRQ) {
+		/* get interrupt status for all channels */
+		pchregs->data.aint = inl(ALI_REG(codec, pchregs->regs.aint));
+		for (channel = 0; channel < ALI_CHANNELS; channel++)
+			snd_ali_update_ptr(codec, channel);
+	}
+	outl((TARGET_REACHED | MIXER_OVERFLOW | MIXER_UNDERFLOW),
+		ALI_REG(codec, ALI_MISCINT));
+
+	return IRQ_HANDLED;
+}
+
+
+static struct snd_ali_voice *snd_ali_alloc_voice(struct snd_ali * codec,
+						 int type, int rec, int channel)
+{
+	struct snd_ali_voice *pvoice;
+	int idx;
+
+	dev_dbg(codec->card->dev, "alloc_voice: type=%d rec=%d\n", type, rec);
+
+	spin_lock_irq(&codec->voice_alloc);
+	if (type == SNDRV_ALI_VOICE_TYPE_PCM) {
+		idx = channel > 0 ? snd_ali_alloc_pcm_channel(codec, channel) :
+			snd_ali_find_free_channel(codec,rec);
+		if (idx < 0) {
+			dev_err(codec->card->dev, "ali_alloc_voice: err.\n");
+			spin_unlock_irq(&codec->voice_alloc);
+			return NULL;
+		}
+		pvoice = &(codec->synth.voices[idx]);
+		pvoice->codec = codec;
+		pvoice->use = 1;
+		pvoice->pcm = 1;
+		pvoice->mode = rec;
+		spin_unlock_irq(&codec->voice_alloc);
+		return pvoice;
+	}
+	spin_unlock_irq(&codec->voice_alloc);
+	return NULL;
+}
+
+
+static void snd_ali_free_voice(struct snd_ali * codec,
+			       struct snd_ali_voice *pvoice)
+{
+	void (*private_free)(void *);
+	void *private_data;
+
+	dev_dbg(codec->card->dev, "free_voice: channel=%d\n", pvoice->number);
+	if (!pvoice->use)
+		return;
+	snd_ali_clear_voices(codec, pvoice->number, pvoice->number);
+	spin_lock_irq(&codec->voice_alloc);
+	private_free = pvoice->private_free;
+	private_data = pvoice->private_data;
+	pvoice->private_free = NULL;
+	pvoice->private_data = NULL;
+	if (pvoice->pcm)
+		snd_ali_free_channel_pcm(codec, pvoice->number);
+	pvoice->use = pvoice->pcm = pvoice->synth = 0;
+	pvoice->substream = NULL;
+	spin_unlock_irq(&codec->voice_alloc);
+	if (private_free)
+		private_free(private_data);
+}
+
+
+static void snd_ali_clear_voices(struct snd_ali *codec,
+				 unsigned int v_min,
+				 unsigned int v_max)
+{
+	unsigned int i;
+
+	for (i = v_min; i <= v_max; i++) {
+		snd_ali_stop_voice(codec, i);
+		snd_ali_disable_voice_irq(codec, i);
+	}
+}
+
+static void snd_ali_write_voice_regs(struct snd_ali *codec,
+			 unsigned int Channel,
+			 unsigned int LBA,
+			 unsigned int CSO,
+			 unsigned int ESO,
+			 unsigned int DELTA,
+			 unsigned int ALPHA_FMS,
+			 unsigned int GVSEL,
+			 unsigned int PAN,
+			 unsigned int VOL,
+			 unsigned int CTRL,
+			 unsigned int EC)
+{
+	unsigned int ctlcmds[4];
+	
+	outb((unsigned char)(Channel & 0x001f), ALI_REG(codec, ALI_GC_CIR));
+
+	ctlcmds[0] =  (CSO << 16) | (ALPHA_FMS & 0x0000ffff);
+	ctlcmds[1] =  LBA;
+	ctlcmds[2] =  (ESO << 16) | (DELTA & 0x0ffff);
+	ctlcmds[3] =  (GVSEL << 31) |
+		      ((PAN & 0x0000007f) << 24) |
+		      ((VOL & 0x000000ff) << 16) |
+		      ((CTRL & 0x0000000f) << 12) |
+		      (EC & 0x00000fff);
+
+	outb(Channel, ALI_REG(codec, ALI_GC_CIR));
+
+	outl(ctlcmds[0], ALI_REG(codec, ALI_CSO_ALPHA_FMS));
+	outl(ctlcmds[1], ALI_REG(codec, ALI_LBA));
+	outl(ctlcmds[2], ALI_REG(codec, ALI_ESO_DELTA));
+	outl(ctlcmds[3], ALI_REG(codec, ALI_GVSEL_PAN_VOC_CTRL_EC));
+
+	outl(0x30000000, ALI_REG(codec, ALI_EBUF1));	/* Still Mode */
+	outl(0x30000000, ALI_REG(codec, ALI_EBUF2));	/* Still Mode */
+}
+
+static unsigned int snd_ali_convert_rate(unsigned int rate, int rec)
+{
+	unsigned int delta;
+
+	if (rate < 4000)
+		rate = 4000;
+	if (rate > 48000)
+		rate = 48000;
+
+	if (rec) {
+		if (rate == 44100)
+			delta = 0x116a;
+		else if (rate == 8000)
+			delta = 0x6000;
+		else if (rate == 48000)
+			delta = 0x1000;
+		else
+			delta = ((48000 << 12) / rate) & 0x0000ffff;
+	} else {
+		if (rate == 44100)
+			delta = 0xeb3;
+		else if (rate == 8000)
+			delta = 0x2ab;
+		else if (rate == 48000)
+			delta = 0x1000;
+		else 
+			delta = (((rate << 12) + rate) / 48000) & 0x0000ffff;
+	}
+
+	return delta;
+}
+
+static unsigned int snd_ali_control_mode(struct snd_pcm_substream *substream)
+{
+	unsigned int CTRL;
+	struct snd_pcm_runtime *runtime = substream->runtime;
+
+	/* set ctrl mode
+	   CTRL default: 8-bit (unsigned) mono, loop mode enabled
+	 */
+	CTRL = 0x00000001;
+	if (snd_pcm_format_width(runtime->format) == 16)
+		CTRL |= 0x00000008;	/* 16-bit data */
+	if (!snd_pcm_format_unsigned(runtime->format))
+		CTRL |= 0x00000002;	/* signed data */
+	if (runtime->channels > 1)
+		CTRL |= 0x00000004;	/* stereo data */
+	return CTRL;
+}
+
+/*
+ *  PCM part
+ */
+
+static int snd_ali_trigger(struct snd_pcm_substream *substream,
+			       int cmd)
+				    
+{
+	struct snd_ali *codec = snd_pcm_substream_chip(substream);
+	struct snd_pcm_substream *s;
+	unsigned int what, whati;
+	struct snd_ali_voice *pvoice, *evoice;
+	unsigned int val;
+	int do_start;
+
+	switch (cmd) {
+	case SNDRV_PCM_TRIGGER_START:
+	case SNDRV_PCM_TRIGGER_RESUME:
+		do_start = 1;
+		break;
+	case SNDRV_PCM_TRIGGER_STOP:
+	case SNDRV_PCM_TRIGGER_SUSPEND:
+		do_start = 0;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	what = whati = 0;
+	snd_pcm_group_for_each_entry(s, substream) {
+		if ((struct snd_ali *) snd_pcm_substream_chip(s) == codec) {
+			pvoice = s->runtime->private_data;
+			evoice = pvoice->extra;
+			what |= 1 << (pvoice->number & 0x1f);
+			if (evoice == NULL)
+				whati |= 1 << (pvoice->number & 0x1f);
+			else {
+				whati |= 1 << (evoice->number & 0x1f);
+				what |= 1 << (evoice->number & 0x1f);
+			}
+			if (do_start) {
+				pvoice->running = 1;
+				if (evoice != NULL)
+					evoice->running = 1;
+			} else {
+				pvoice->running = 0;
+				if (evoice != NULL)
+					evoice->running = 0;
+			}
+			snd_pcm_trigger_done(s, substream);
+		}
+	}
+	spin_lock(&codec->reg_lock);
+	if (!do_start)
+		outl(what, ALI_REG(codec, ALI_STOP));
+	val = inl(ALI_REG(codec, ALI_AINTEN));
+	if (do_start)
+		val |= whati;
+	else
+		val &= ~whati;
+	outl(val, ALI_REG(codec, ALI_AINTEN));
+	if (do_start)
+		outl(what, ALI_REG(codec, ALI_START));
+	dev_dbg(codec->card->dev, "trigger: what=%xh whati=%xh\n", what, whati);
+	spin_unlock(&codec->reg_lock);
+
+	return 0;
+}
+
+static int snd_ali_playback_hw_params(struct snd_pcm_substream *substream,
+				      struct snd_pcm_hw_params *hw_params)
+{
+	struct snd_ali *codec = snd_pcm_substream_chip(substream);
+	struct snd_pcm_runtime *runtime = substream->runtime;
+	struct snd_ali_voice *pvoice = runtime->private_data;
+	struct snd_ali_voice *evoice = pvoice->extra;
+
+	/* voice management */
+
+	if (params_buffer_size(hw_params) / 2 !=
+	    params_period_size(hw_params)) {
+		if (!evoice) {
+			evoice = snd_ali_alloc_voice(codec,
+						     SNDRV_ALI_VOICE_TYPE_PCM,
+						     0, -1);
+			if (!evoice)
+				return -ENOMEM;
+			pvoice->extra = evoice;
+			evoice->substream = substream;
+		}
+	} else {
+		if (evoice) {
+			snd_ali_free_voice(codec, evoice);
+			pvoice->extra = evoice = NULL;
+		}
+	}
+
+	return 0;
+}
+
+static int snd_ali_playback_hw_free(struct snd_pcm_substream *substream)
+{
+	struct snd_ali *codec = snd_pcm_substream_chip(substream);
+	struct snd_pcm_runtime *runtime = substream->runtime;
+	struct snd_ali_voice *pvoice = runtime->private_data;
+	struct snd_ali_voice *evoice = pvoice ? pvoice->extra : NULL;
+
+	if (evoice) {
+		snd_ali_free_voice(codec, evoice);
+		pvoice->extra = NULL;
+	}
+	return 0;
+}
+
+static int snd_ali_playback_prepare(struct snd_pcm_substream *substream)
+{
+	struct snd_ali *codec = snd_pcm_substream_chip(substream);
+	struct snd_pcm_runtime *runtime = substream->runtime;
+	struct snd_ali_voice *pvoice = runtime->private_data;
+	struct snd_ali_voice *evoice = pvoice->extra;
+
+	unsigned int LBA;
+	unsigned int Delta;
+	unsigned int ESO;
+	unsigned int CTRL;
+	unsigned int GVSEL;
+	unsigned int PAN;
+	unsigned int VOL;
+	unsigned int EC;
+	
+	dev_dbg(codec->card->dev, "playback_prepare ...\n");
+
+	spin_lock_irq(&codec->reg_lock);	
+	
+	/* set Delta (rate) value */
+	Delta = snd_ali_convert_rate(runtime->rate, 0);
+
+	if (pvoice->number == ALI_SPDIF_IN_CHANNEL || 
+	    pvoice->number == ALI_PCM_IN_CHANNEL)
+		snd_ali_disable_special_channel(codec, pvoice->number);
+	else if (codec->spdif_support &&
+		 (inl(ALI_REG(codec, ALI_GLOBAL_CONTROL)) &
+		  ALI_SPDIF_OUT_CH_ENABLE)
+		 && pvoice->number == ALI_SPDIF_OUT_CHANNEL) {
+		snd_ali_set_spdif_out_rate(codec, runtime->rate);
+		Delta = 0x1000;
+	}
+	
+	/* set Loop Back Address */
+	LBA = runtime->dma_addr;
+
+	/* set interrupt count size */
+	pvoice->count = runtime->period_size;
+
+	/* set target ESO for channel */
+	pvoice->eso = runtime->buffer_size; 
+
+	dev_dbg(codec->card->dev, "playback_prepare: eso=%xh count=%xh\n",
+		       pvoice->eso, pvoice->count);
+
+	/* set ESO to capture first MIDLP interrupt */
+	ESO = pvoice->eso -1;
+	/* set ctrl mode */
+	CTRL = snd_ali_control_mode(substream);
+
+	GVSEL = 1;
+	PAN = 0;
+	VOL = 0;
+	EC = 0;
+	dev_dbg(codec->card->dev, "playback_prepare:\n");
+	dev_dbg(codec->card->dev,
+		"ch=%d, Rate=%d Delta=%xh,GVSEL=%xh,PAN=%xh,CTRL=%xh\n",
+		       pvoice->number,runtime->rate,Delta,GVSEL,PAN,CTRL);
+	snd_ali_write_voice_regs(codec,
+				 pvoice->number,
+				 LBA,
+				 0,	/* cso */
+				 ESO,
+				 Delta,
+				 0,	/* alpha */
+				 GVSEL,
+				 PAN,
+				 VOL,
+				 CTRL,
+				 EC);
+	if (evoice) {
+		evoice->count = pvoice->count;
+		evoice->eso = pvoice->count << 1;
+		ESO = evoice->eso - 1;
+		snd_ali_write_voice_regs(codec,
+					 evoice->number,
+					 LBA,
+					 0,	/* cso */
+					 ESO,
+					 Delta,
+					 0,	/* alpha */
+					 GVSEL,
+					 0x7f,
+					 0x3ff,
+					 CTRL,
+					 EC);
+	}
+	spin_unlock_irq(&codec->reg_lock);
+	return 0;
+}
+
+
+static int snd_ali_prepare(struct snd_pcm_substream *substream)
+{
+	struct snd_ali *codec = snd_pcm_substream_chip(substream);
+	struct snd_pcm_runtime *runtime = substream->runtime;
+	struct snd_ali_voice *pvoice = runtime->private_data;
+	unsigned int LBA;
+	unsigned int Delta;
+	unsigned int ESO;
+	unsigned int CTRL;
+	unsigned int GVSEL;
+	unsigned int PAN;
+	unsigned int VOL;
+	unsigned int EC;
+	u8	 bValue;
+
+	spin_lock_irq(&codec->reg_lock);
+
+	dev_dbg(codec->card->dev, "ali_prepare...\n");
+
+	snd_ali_enable_special_channel(codec,pvoice->number);
+
+	Delta = (pvoice->number == ALI_MODEM_IN_CHANNEL ||
+		 pvoice->number == ALI_MODEM_OUT_CHANNEL) ? 
+		0x1000 : snd_ali_convert_rate(runtime->rate, pvoice->mode);
+
+	/* Prepare capture intr channel */
+	if (pvoice->number == ALI_SPDIF_IN_CHANNEL) {
+
+		unsigned int rate;
+		
+		spin_unlock_irq(&codec->reg_lock);
+		if (codec->revision != ALI_5451_V02)
+			return -1;
+
+		rate = snd_ali_get_spdif_in_rate(codec);
+		if (rate == 0) {
+			dev_warn(codec->card->dev,
+				 "ali_capture_prepare: spdif rate detect err!\n");
+			rate = 48000;
+		}
+		spin_lock_irq(&codec->reg_lock);
+		bValue = inb(ALI_REG(codec,ALI_SPDIF_CTRL));
+		if (bValue & 0x10) {
+			outb(bValue,ALI_REG(codec,ALI_SPDIF_CTRL));
+			dev_warn(codec->card->dev,
+				 "clear SPDIF parity error flag.\n");
+		}
+
+		if (rate != 48000)
+			Delta = ((rate << 12) / runtime->rate) & 0x00ffff;
+	}
+
+	/* set target ESO for channel  */
+	pvoice->eso = runtime->buffer_size; 
+
+	/* set interrupt count size  */
+	pvoice->count = runtime->period_size;
+
+	/* set Loop Back Address  */
+	LBA = runtime->dma_addr;
+
+	/* set ESO to capture first MIDLP interrupt  */
+	ESO = pvoice->eso - 1;
+	CTRL = snd_ali_control_mode(substream);
+	GVSEL = 0;
+	PAN = 0x00;
+	VOL = 0x00;
+	EC = 0;
+
+	snd_ali_write_voice_regs(    codec,
+				     pvoice->number,
+				     LBA,
+				     0,	/* cso */
+				     ESO,
+				     Delta,
+				     0,	/* alpha */
+				     GVSEL,
+				     PAN,
+				     VOL,
+				     CTRL,
+				     EC);
+
+	spin_unlock_irq(&codec->reg_lock);
+
+	return 0;
+}
+
+
+static snd_pcm_uframes_t
+snd_ali_playback_pointer(struct snd_pcm_substream *substream)
+{
+	struct snd_ali *codec = snd_pcm_substream_chip(substream);
+	struct snd_pcm_runtime *runtime = substream->runtime;
+	struct snd_ali_voice *pvoice = runtime->private_data;
+	unsigned int cso;
+
+	spin_lock(&codec->reg_lock);
+	if (!pvoice->running) {
+		spin_unlock(&codec->reg_lock);
+		return 0;
+	}
+	outb(pvoice->number, ALI_REG(codec, ALI_GC_CIR));
+	cso = inw(ALI_REG(codec, ALI_CSO_ALPHA_FMS + 2));
+	spin_unlock(&codec->reg_lock);
+	dev_dbg(codec->card->dev, "playback pointer returned cso=%xh.\n", cso);
+
+	cso %= runtime->buffer_size;
+	return cso;
+}
+
+
+static snd_pcm_uframes_t snd_ali_pointer(struct snd_pcm_substream *substream)
+{
+	struct snd_ali *codec = snd_pcm_substream_chip(substream);
+	struct snd_pcm_runtime *runtime = substream->runtime;
+	struct snd_ali_voice *pvoice = runtime->private_data;
+	unsigned int cso;
+
+	spin_lock(&codec->reg_lock);
+	if (!pvoice->running) {
+		spin_unlock(&codec->reg_lock);
+		return 0;
+	}
+	outb(pvoice->number, ALI_REG(codec, ALI_GC_CIR));
+	cso = inw(ALI_REG(codec, ALI_CSO_ALPHA_FMS + 2));
+	spin_unlock(&codec->reg_lock);
+
+	cso %= runtime->buffer_size;
+	return cso;
+}
+
+static const struct snd_pcm_hardware snd_ali_playback =
+{
+	.info =		(SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
+			 SNDRV_PCM_INFO_BLOCK_TRANSFER |
+			 SNDRV_PCM_INFO_MMAP_VALID |
+			 SNDRV_PCM_INFO_RESUME |
+			 SNDRV_PCM_INFO_SYNC_START),
+	.formats =	(SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S16_LE |
+			 SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_U16_LE),
+	.rates =	SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_8000_48000,
+	.rate_min =		4000,
+	.rate_max =		48000,
+	.channels_min =		1,
+	.channels_max =		2,
+	.buffer_bytes_max =	(256*1024),
+	.period_bytes_min =	64,
+	.period_bytes_max =	(256*1024),
+	.periods_min =		1,
+	.periods_max =		1024,
+	.fifo_size =		0,
+};
+
+/*
+ *  Capture support device description
+ */
+
+static const struct snd_pcm_hardware snd_ali_capture =
+{
+	.info =		(SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
+			 SNDRV_PCM_INFO_BLOCK_TRANSFER |
+			 SNDRV_PCM_INFO_MMAP_VALID |
+			 SNDRV_PCM_INFO_RESUME |
+			 SNDRV_PCM_INFO_SYNC_START),
+	.formats =	(SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S16_LE |
+			 SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_U16_LE),
+	.rates =	SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_8000_48000,
+	.rate_min =		4000,
+	.rate_max =		48000,
+	.channels_min =		1,
+	.channels_max =		2,
+	.buffer_bytes_max =	(128*1024),
+	.period_bytes_min =	64,
+	.period_bytes_max =	(128*1024),
+	.periods_min =		1,
+	.periods_max =		1024,
+	.fifo_size =		0,
+};
+
+static void snd_ali_pcm_free_substream(struct snd_pcm_runtime *runtime)
+{
+	struct snd_ali_voice *pvoice = runtime->private_data;
+
+	if (pvoice)
+		snd_ali_free_voice(pvoice->codec, pvoice);
+}
+
+static int snd_ali_open(struct snd_pcm_substream *substream, int rec,
+			int channel, const struct snd_pcm_hardware *phw)
+{
+	struct snd_ali *codec = snd_pcm_substream_chip(substream);
+	struct snd_pcm_runtime *runtime = substream->runtime;
+	struct snd_ali_voice *pvoice;
+
+	pvoice = snd_ali_alloc_voice(codec, SNDRV_ALI_VOICE_TYPE_PCM, rec,
+				     channel);
+	if (!pvoice)
+		return -EAGAIN;
+
+	pvoice->substream = substream;
+	runtime->private_data = pvoice;
+	runtime->private_free = snd_ali_pcm_free_substream;
+
+	runtime->hw = *phw;
+	snd_pcm_set_sync(substream);
+	snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
+				     0, 64*1024);
+	return 0;
+}
+
+static int snd_ali_playback_open(struct snd_pcm_substream *substream)
+{
+	return snd_ali_open(substream, 0, -1, &snd_ali_playback);
+}
+
+static int snd_ali_capture_open(struct snd_pcm_substream *substream)
+{
+	return snd_ali_open(substream, 1, -1, &snd_ali_capture);
+}
+
+static int snd_ali_playback_close(struct snd_pcm_substream *substream)
+{
+	return 0;
+}
+
+static int snd_ali_close(struct snd_pcm_substream *substream)
+{
+	struct snd_ali *codec = snd_pcm_substream_chip(substream);
+	struct snd_ali_voice *pvoice = substream->runtime->private_data;
+
+	snd_ali_disable_special_channel(codec,pvoice->number);
+
+	return 0;
+}
+
+static const struct snd_pcm_ops snd_ali_playback_ops = {
+	.open =		snd_ali_playback_open,
+	.close =	snd_ali_playback_close,
+	.hw_params =	snd_ali_playback_hw_params,
+	.hw_free =	snd_ali_playback_hw_free,
+	.prepare =	snd_ali_playback_prepare,
+	.trigger =	snd_ali_trigger,
+	.pointer =	snd_ali_playback_pointer,
+};
+
+static const struct snd_pcm_ops snd_ali_capture_ops = {
+	.open =		snd_ali_capture_open,
+	.close =	snd_ali_close,
+	.prepare =	snd_ali_prepare,
+	.trigger =	snd_ali_trigger,
+	.pointer =	snd_ali_pointer,
+};
+
+/*
+ * Modem PCM
+ */
+
+static int snd_ali_modem_hw_params(struct snd_pcm_substream *substream,
+				 struct snd_pcm_hw_params *hw_params)
+{
+	struct snd_ali *chip = snd_pcm_substream_chip(substream);
+	unsigned int modem_num = chip->num_of_codecs - 1;
+	snd_ac97_write(chip->ac97[modem_num], AC97_LINE1_RATE,
+		       params_rate(hw_params));
+	snd_ac97_write(chip->ac97[modem_num], AC97_LINE1_LEVEL, 0);
+	return 0;
+}
+
+static const struct snd_pcm_hardware snd_ali_modem =
+{
+	.info =		(SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
+			 SNDRV_PCM_INFO_BLOCK_TRANSFER |
+			 SNDRV_PCM_INFO_MMAP_VALID |
+			 SNDRV_PCM_INFO_RESUME |
+			 SNDRV_PCM_INFO_SYNC_START),
+	.formats =	SNDRV_PCM_FMTBIT_S16_LE,
+	.rates =	(SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_8000 |
+			 SNDRV_PCM_RATE_16000),
+	.rate_min =		8000,
+	.rate_max =		16000,
+	.channels_min =		1,
+	.channels_max =		1,
+	.buffer_bytes_max =	(256*1024),
+	.period_bytes_min =	64,
+	.period_bytes_max =	(256*1024),
+	.periods_min =		1,
+	.periods_max =		1024,
+	.fifo_size =		0,
+};
+
+static int snd_ali_modem_open(struct snd_pcm_substream *substream, int rec,
+			      int channel)
+{
+	static const unsigned int rates[] = {8000, 9600, 12000, 16000};
+	static const struct snd_pcm_hw_constraint_list hw_constraint_rates = {
+		.count = ARRAY_SIZE(rates),
+		.list = rates,
+		.mask = 0,
+	};
+	int err = snd_ali_open(substream, rec, channel, &snd_ali_modem);
+
+	if (err)
+		return err;
+	return snd_pcm_hw_constraint_list(substream->runtime, 0,
+			SNDRV_PCM_HW_PARAM_RATE, &hw_constraint_rates);
+}
+
+static int snd_ali_modem_playback_open(struct snd_pcm_substream *substream)
+{
+	return snd_ali_modem_open(substream, 0, ALI_MODEM_OUT_CHANNEL);
+}
+
+static int snd_ali_modem_capture_open(struct snd_pcm_substream *substream)
+{
+	return snd_ali_modem_open(substream, 1, ALI_MODEM_IN_CHANNEL);
+}
+
+static const struct snd_pcm_ops snd_ali_modem_playback_ops = {
+	.open =		snd_ali_modem_playback_open,
+	.close =	snd_ali_close,
+	.hw_params =	snd_ali_modem_hw_params,
+	.prepare =	snd_ali_prepare,
+	.trigger =	snd_ali_trigger,
+	.pointer =	snd_ali_pointer,
+};
+
+static const struct snd_pcm_ops snd_ali_modem_capture_ops = {
+	.open =		snd_ali_modem_capture_open,
+	.close =	snd_ali_close,
+	.hw_params =	snd_ali_modem_hw_params,
+	.prepare =	snd_ali_prepare,
+	.trigger =	snd_ali_trigger,
+	.pointer =	snd_ali_pointer,
+};
+
+
+struct ali_pcm_description {
+	char *name;
+	unsigned int playback_num;
+	unsigned int capture_num;
+	const struct snd_pcm_ops *playback_ops;
+	const struct snd_pcm_ops *capture_ops;
+	unsigned short class;
+};
+
+
+static void snd_ali_pcm_free(struct snd_pcm *pcm)
+{
+	struct snd_ali *codec = pcm->private_data;
+	codec->pcm[pcm->device] = NULL;
+}
+
+
+static int snd_ali_pcm(struct snd_ali *codec, int device,
+		       struct ali_pcm_description *desc)
+{
+	struct snd_pcm *pcm;
+	int err;
+
+	err = snd_pcm_new(codec->card, desc->name, device,
+			  desc->playback_num, desc->capture_num, &pcm);
+	if (err < 0) {
+		dev_err(codec->card->dev,
+			"snd_ali_pcm: err called snd_pcm_new.\n");
+		return err;
+	}
+	pcm->private_data = codec;
+	pcm->private_free = snd_ali_pcm_free;
+	if (desc->playback_ops)
+		snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK,
+				desc->playback_ops);
+	if (desc->capture_ops)
+		snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE,
+				desc->capture_ops);
+
+	snd_pcm_set_managed_buffer_all(pcm, SNDRV_DMA_TYPE_DEV,
+				       &codec->pci->dev, 64*1024, 128*1024);
+
+	pcm->info_flags = 0;
+	pcm->dev_class = desc->class;
+	pcm->dev_subclass = SNDRV_PCM_SUBCLASS_GENERIC_MIX;
+	strcpy(pcm->name, desc->name);
+	codec->pcm[0] = pcm;
+	return 0;
+}
+
+static struct ali_pcm_description ali_pcms[] = {
+	{ .name = "ALI 5451",
+	  .playback_num = ALI_CHANNELS,
+	  .capture_num = 1,
+	  .playback_ops = &snd_ali_playback_ops,
+	  .capture_ops = &snd_ali_capture_ops
+	},
+	{ .name = "ALI 5451 modem",
+	  .playback_num = 1,
+	  .capture_num = 1,
+	  .playback_ops = &snd_ali_modem_playback_ops,
+	  .capture_ops = &snd_ali_modem_capture_ops,
+	  .class = SNDRV_PCM_CLASS_MODEM
+	}
+};
+
+static int snd_ali_build_pcms(struct snd_ali *codec)
+{
+	int i, err;
+	for (i = 0; i < codec->num_of_codecs && i < ARRAY_SIZE(ali_pcms); i++) {
+		err = snd_ali_pcm(codec, i, &ali_pcms[i]);
+		if (err < 0)
+			return err;
+	}
+	return 0;
+}
+
+
+#define ALI5451_SPDIF(xname, xindex, value) \
+{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex,\
+.info = snd_ali5451_spdif_info, .get = snd_ali5451_spdif_get, \
+.put = snd_ali5451_spdif_put, .private_value = value}
+
+#define snd_ali5451_spdif_info		snd_ctl_boolean_mono_info
+
+static int snd_ali5451_spdif_get(struct snd_kcontrol *kcontrol,
+				 struct snd_ctl_elem_value *ucontrol)
+{
+	struct snd_ali *codec = kcontrol->private_data;
+	unsigned int spdif_enable;
+
+	spdif_enable = ucontrol->value.integer.value[0] ? 1 : 0;
+
+	spin_lock_irq(&codec->reg_lock);
+	switch (kcontrol->private_value) {
+	case 0:
+		spdif_enable = (codec->spdif_mask & 0x02) ? 1 : 0;
+		break;
+	case 1:
+		spdif_enable = ((codec->spdif_mask & 0x02) &&
+			  (codec->spdif_mask & 0x04)) ? 1 : 0;
+		break;
+	case 2:
+		spdif_enable = (codec->spdif_mask & 0x01) ? 1 : 0;
+		break;
+	default:
+		break;
+	}
+	ucontrol->value.integer.value[0] = spdif_enable;
+	spin_unlock_irq(&codec->reg_lock);
+	return 0;
+}
+
+static int snd_ali5451_spdif_put(struct snd_kcontrol *kcontrol,
+				 struct snd_ctl_elem_value *ucontrol)
+{
+	struct snd_ali *codec = kcontrol->private_data;
+	unsigned int change = 0, spdif_enable = 0;
+
+	spdif_enable = ucontrol->value.integer.value[0] ? 1 : 0;
+
+	spin_lock_irq(&codec->reg_lock);
+	switch (kcontrol->private_value) {
+	case 0:
+		change = (codec->spdif_mask & 0x02) ? 1 : 0;
+		change = change ^ spdif_enable;
+		if (change) {
+			if (spdif_enable) {
+				codec->spdif_mask |= 0x02;
+				snd_ali_enable_spdif_out(codec);
+			} else {
+				codec->spdif_mask &= ~(0x02);
+				codec->spdif_mask &= ~(0x04);
+				snd_ali_disable_spdif_out(codec);
+			}
+		}
+		break;
+	case 1: 
+		change = (codec->spdif_mask & 0x04) ? 1 : 0;
+		change = change ^ spdif_enable;
+		if (change && (codec->spdif_mask & 0x02)) {
+			if (spdif_enable) {
+				codec->spdif_mask |= 0x04;
+				snd_ali_enable_spdif_chnout(codec);
+			} else {
+				codec->spdif_mask &= ~(0x04);
+				snd_ali_disable_spdif_chnout(codec);
+			}
+		}
+		break;
+	case 2:
+		change = (codec->spdif_mask & 0x01) ? 1 : 0;
+		change = change ^ spdif_enable;
+		if (change) {
+			if (spdif_enable) {
+				codec->spdif_mask |= 0x01;
+				snd_ali_enable_spdif_in(codec);
+			} else {
+				codec->spdif_mask &= ~(0x01);
+				snd_ali_disable_spdif_in(codec);
+			}
+		}
+		break;
+	default:
+		break;
+	}
+	spin_unlock_irq(&codec->reg_lock);
+	
+	return change;
+}
+
+static const struct snd_kcontrol_new snd_ali5451_mixer_spdif[] = {
+	/* spdif aplayback switch */
+	/* FIXME: "IEC958 Playback Switch" may conflict with one on ac97_codec */
+	ALI5451_SPDIF(SNDRV_CTL_NAME_IEC958("Output ",NONE,SWITCH), 0, 0),
+	/* spdif out to spdif channel */
+	ALI5451_SPDIF(SNDRV_CTL_NAME_IEC958("Channel Output ",NONE,SWITCH), 0, 1),
+	/* spdif in from spdif channel */
+	ALI5451_SPDIF(SNDRV_CTL_NAME_IEC958("",CAPTURE,SWITCH), 0, 2)
+};
+
+static int snd_ali_mixer(struct snd_ali *codec)
+{
+	struct snd_ac97_template ac97;
+	unsigned int idx;
+	int i, err;
+	static const struct snd_ac97_bus_ops ops = {
+		.write = snd_ali_codec_write,
+		.read = snd_ali_codec_read,
+	};
+
+	err = snd_ac97_bus(codec->card, 0, &ops, codec, &codec->ac97_bus);
+	if (err < 0)
+		return err;
+
+	memset(&ac97, 0, sizeof(ac97));
+	ac97.private_data = codec;
+
+	for (i = 0; i < codec->num_of_codecs; i++) {
+		ac97.num = i;
+		err = snd_ac97_mixer(codec->ac97_bus, &ac97, &codec->ac97[i]);
+		if (err < 0) {
+			dev_err(codec->card->dev,
+				   "ali mixer %d creating error.\n", i);
+			if (i == 0)
+				return err;
+			codec->num_of_codecs = 1;
+			break;
+		}
+	}
+
+	if (codec->spdif_support) {
+		for (idx = 0; idx < ARRAY_SIZE(snd_ali5451_mixer_spdif); idx++) {
+			err = snd_ctl_add(codec->card,
+					  snd_ctl_new1(&snd_ali5451_mixer_spdif[idx], codec));
+			if (err < 0)
+				return err;
+		}
+	}
+	return 0;
+}
+
+#ifdef CONFIG_PM_SLEEP
+static int ali_suspend(struct device *dev)
+{
+	struct snd_card *card = dev_get_drvdata(dev);
+	struct snd_ali *chip = card->private_data;
+	struct snd_ali_image *im;
+	int i, j;
+
+	im = chip->image;
+	if (!im)
+		return 0;
+
+	snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);
+	for (i = 0; i < chip->num_of_codecs; i++)
+		snd_ac97_suspend(chip->ac97[i]);
+
+	spin_lock_irq(&chip->reg_lock);
+	
+	im->regs[ALI_MISCINT >> 2] = inl(ALI_REG(chip, ALI_MISCINT));
+	/* im->regs[ALI_START >> 2] = inl(ALI_REG(chip, ALI_START)); */
+	im->regs[ALI_STOP >> 2] = inl(ALI_REG(chip, ALI_STOP));
+	
+	/* disable all IRQ bits */
+	outl(0, ALI_REG(chip, ALI_MISCINT));
+	
+	for (i = 0; i < ALI_GLOBAL_REGS; i++) {	
+		if ((i*4 == ALI_MISCINT) || (i*4 == ALI_STOP))
+			continue;
+		im->regs[i] = inl(ALI_REG(chip, i*4));
+	}
+	
+	for (i = 0; i < ALI_CHANNELS; i++) {
+		outb(i, ALI_REG(chip, ALI_GC_CIR));
+		for (j = 0; j < ALI_CHANNEL_REGS; j++) 
+			im->channel_regs[i][j] = inl(ALI_REG(chip, j*4 + 0xe0));
+	}
+
+	/* stop all HW channel */
+	outl(0xffffffff, ALI_REG(chip, ALI_STOP));
+
+	spin_unlock_irq(&chip->reg_lock);
+	return 0;
+}
+
+static int ali_resume(struct device *dev)
+{
+	struct snd_card *card = dev_get_drvdata(dev);
+	struct snd_ali *chip = card->private_data;
+	struct snd_ali_image *im;
+	int i, j;
+
+	im = chip->image;
+	if (!im)
+		return 0;
+
+	spin_lock_irq(&chip->reg_lock);
+	
+	for (i = 0; i < ALI_CHANNELS; i++) {
+		outb(i, ALI_REG(chip, ALI_GC_CIR));
+		for (j = 0; j < ALI_CHANNEL_REGS; j++) 
+			outl(im->channel_regs[i][j], ALI_REG(chip, j*4 + 0xe0));
+	}
+	
+	for (i = 0; i < ALI_GLOBAL_REGS; i++) {	
+		if ((i*4 == ALI_MISCINT) || (i*4 == ALI_STOP) ||
+		    (i*4 == ALI_START))
+			continue;
+		outl(im->regs[i], ALI_REG(chip, i*4));
+	}
+	
+	/* start HW channel */
+	outl(im->regs[ALI_START >> 2], ALI_REG(chip, ALI_START));
+	/* restore IRQ enable bits */
+	outl(im->regs[ALI_MISCINT >> 2], ALI_REG(chip, ALI_MISCINT));
+	
+	spin_unlock_irq(&chip->reg_lock);
+
+	for (i = 0 ; i < chip->num_of_codecs; i++)
+		snd_ac97_resume(chip->ac97[i]);
+	
+	snd_power_change_state(card, SNDRV_CTL_POWER_D0);
+	return 0;
+}
+
+static SIMPLE_DEV_PM_OPS(ali_pm, ali_suspend, ali_resume);
+#define ALI_PM_OPS	&ali_pm
+#else
+#define ALI_PM_OPS	NULL
+#endif /* CONFIG_PM_SLEEP */
+
+static int snd_ali_free(struct snd_ali * codec)
+{
+	if (codec->hw_initialized)
+		snd_ali_disable_address_interrupt(codec);
+	if (codec->irq >= 0)
+		free_irq(codec->irq, codec);
+	if (codec->port)
+		pci_release_regions(codec->pci);
+	pci_disable_device(codec->pci);
+#ifdef CONFIG_PM_SLEEP
+	kfree(codec->image);
+#endif
+	pci_dev_put(codec->pci_m1533);
+	pci_dev_put(codec->pci_m7101);
+	kfree(codec);
+	return 0;
+}
+
+static int snd_ali_chip_init(struct snd_ali *codec)
+{
+	unsigned int legacy;
+	unsigned char temp;
+	struct pci_dev *pci_dev;
+
+	dev_dbg(codec->card->dev, "chip initializing ...\n");
+
+	if (snd_ali_reset_5451(codec)) {
+		dev_err(codec->card->dev, "ali_chip_init: reset 5451 error.\n");
+		return -1;
+	}
+
+	if (codec->revision == ALI_5451_V02) {
+        	pci_dev = codec->pci_m1533;
+		pci_read_config_byte(pci_dev, 0x59, &temp);
+		temp |= 0x80;
+		pci_write_config_byte(pci_dev, 0x59, temp);
+	
+		pci_dev = codec->pci_m7101;
+		pci_read_config_byte(pci_dev, 0xb8, &temp);
+		temp |= 0x20;
+		pci_write_config_byte(pci_dev, 0xB8, temp);
+	}
+
+	pci_read_config_dword(codec->pci, 0x44, &legacy);
+	legacy &= 0xff00ff00;
+	legacy |= 0x000800aa;
+	pci_write_config_dword(codec->pci, 0x44, legacy);
+
+	outl(0x80000001, ALI_REG(codec, ALI_GLOBAL_CONTROL));
+	outl(0x00000000, ALI_REG(codec, ALI_AINTEN));
+	outl(0xffffffff, ALI_REG(codec, ALI_AINT));
+	outl(0x00000000, ALI_REG(codec, ALI_VOLUME));
+	outb(0x10, 	 ALI_REG(codec, ALI_MPUR2));
+
+	codec->ac97_ext_id = snd_ali_codec_peek(codec, 0, AC97_EXTENDED_ID);
+	codec->ac97_ext_status = snd_ali_codec_peek(codec, 0,
+						    AC97_EXTENDED_STATUS);
+	if (codec->spdif_support) {
+		snd_ali_enable_spdif_out(codec);
+		codec->spdif_mask = 0x00000002;
+	}
+
+	codec->num_of_codecs = 1;
+
+	/* secondary codec - modem */
+	if (inl(ALI_REG(codec, ALI_SCTRL)) & ALI_SCTRL_CODEC2_READY) {
+		codec->num_of_codecs++;
+		outl(inl(ALI_REG(codec, ALI_SCTRL)) |
+		     (ALI_SCTRL_LINE_IN2 | ALI_SCTRL_GPIO_IN2 |
+		      ALI_SCTRL_LINE_OUT_EN),
+		     ALI_REG(codec, ALI_SCTRL));
+	}
+
+	dev_dbg(codec->card->dev, "chip initialize succeed.\n");
+	return 0;
+
+}
+
+/* proc for register dump */
+static void snd_ali_proc_read(struct snd_info_entry *entry,
+			      struct snd_info_buffer *buf)
+{
+	struct snd_ali *codec = entry->private_data;
+	int i;
+	for (i = 0; i < 256 ; i+= 4)
+		snd_iprintf(buf, "%02x: %08x\n", i, inl(ALI_REG(codec, i)));
+}
+
+static void snd_ali_proc_init(struct snd_ali *codec)
+{
+	snd_card_ro_proc_new(codec->card, "ali5451", codec, snd_ali_proc_read);
+}
+
+static int snd_ali_resources(struct snd_ali *codec)
+{
+	int err;
+
+	dev_dbg(codec->card->dev, "resources allocation ...\n");
+	err = pci_request_regions(codec->pci, "ALI 5451");
+	if (err < 0)
+		return err;
+	codec->port = pci_resource_start(codec->pci, 0);
+
+	if (request_irq(codec->pci->irq, snd_ali_card_interrupt,
+			IRQF_SHARED, KBUILD_MODNAME, codec)) {
+		dev_err(codec->card->dev, "Unable to request irq.\n");
+		return -EBUSY;
+	}
+	codec->irq = codec->pci->irq;
+	codec->card->sync_irq = codec->irq;
+	dev_dbg(codec->card->dev, "resources allocated.\n");
+	return 0;
+}
+static int snd_ali_dev_free(struct snd_device *device)
+{
+	struct snd_ali *codec = device->device_data;
+	snd_ali_free(codec);
+	return 0;
+}
+
+static int snd_ali_create(struct snd_card *card,
+			  struct pci_dev *pci,
+			  int pcm_streams,
+			  int spdif_support,
+			  struct snd_ali **r_ali)
+{
+	struct snd_ali *codec;
+	int i, err;
+	unsigned short cmdw;
+	static const struct snd_device_ops ops = {
+		.dev_free = snd_ali_dev_free,
+        };
+
+	*r_ali = NULL;
+
+	dev_dbg(card->dev, "creating ...\n");
+
+	/* enable PCI device */
+	err = pci_enable_device(pci);
+	if (err < 0)
+		return err;
+	/* check, if we can restrict PCI DMA transfers to 31 bits */
+	if (dma_set_mask(&pci->dev, DMA_BIT_MASK(31)) < 0 ||
+	    dma_set_coherent_mask(&pci->dev, DMA_BIT_MASK(31)) < 0) {
+		dev_err(card->dev,
+			"architecture does not support 31bit PCI busmaster DMA\n");
+		pci_disable_device(pci);
+		return -ENXIO;
+	}
+
+	codec = kzalloc(sizeof(*codec), GFP_KERNEL);
+	if (!codec) {
+		pci_disable_device(pci);
+		return -ENOMEM;
+	}
+
+	spin_lock_init(&codec->reg_lock);
+	spin_lock_init(&codec->voice_alloc);
+
+	codec->card = card;
+	codec->pci = pci;
+	codec->irq = -1;
+	codec->revision = pci->revision;
+	codec->spdif_support = spdif_support;
+
+	if (pcm_streams < 1)
+		pcm_streams = 1;
+	if (pcm_streams > 32)
+		pcm_streams = 32;
+	
+	pci_set_master(pci);
+	pci_read_config_word(pci, PCI_COMMAND, &cmdw);
+	if ((cmdw & PCI_COMMAND_IO) != PCI_COMMAND_IO) {
+		cmdw |= PCI_COMMAND_IO;
+		pci_write_config_word(pci, PCI_COMMAND, cmdw);
+	}
+	pci_set_master(pci);
+	
+	if (snd_ali_resources(codec)) {
+		snd_ali_free(codec);
+		return -EBUSY;
+	}
+
+	codec->synth.chmap = 0;
+	codec->synth.chcnt = 0;
+	codec->spdif_mask = 0;
+	codec->synth.synthcount = 0;
+
+	if (codec->revision == ALI_5451_V02)
+		codec->chregs.regs.ac97read = ALI_AC97_WRITE;
+	else
+		codec->chregs.regs.ac97read = ALI_AC97_READ;
+	codec->chregs.regs.ac97write = ALI_AC97_WRITE;
+
+	codec->chregs.regs.start  = ALI_START;
+	codec->chregs.regs.stop   = ALI_STOP;
+	codec->chregs.regs.aint   = ALI_AINT;
+	codec->chregs.regs.ainten = ALI_AINTEN;
+
+	codec->chregs.data.start  = 0x00;
+	codec->chregs.data.stop   = 0x00;
+	codec->chregs.data.aint   = 0x00;
+	codec->chregs.data.ainten = 0x00;
+
+	/* M1533: southbridge */
+	codec->pci_m1533 = pci_get_device(0x10b9, 0x1533, NULL);
+	if (!codec->pci_m1533) {
+		dev_err(card->dev, "cannot find ALi 1533 chip.\n");
+		snd_ali_free(codec);
+		return -ENODEV;
+	}
+	/* M7101: power management */
+	codec->pci_m7101 = pci_get_device(0x10b9, 0x7101, NULL);
+	if (!codec->pci_m7101 && codec->revision == ALI_5451_V02) {
+		dev_err(card->dev, "cannot find ALi 7101 chip.\n");
+		snd_ali_free(codec);
+		return -ENODEV;
+	}
+
+	dev_dbg(card->dev, "snd_device_new is called.\n");
+	err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, codec, &ops);
+	if (err < 0) {
+		snd_ali_free(codec);
+		return err;
+	}
+
+	/* initialise synth voices*/
+	for (i = 0; i < ALI_CHANNELS; i++)
+		codec->synth.voices[i].number = i;
+
+	err = snd_ali_chip_init(codec);
+	if (err < 0) {
+		dev_err(card->dev, "ali create: chip init error.\n");
+		return err;
+	}
+
+#ifdef CONFIG_PM_SLEEP
+	codec->image = kmalloc(sizeof(*codec->image), GFP_KERNEL);
+	if (!codec->image)
+		dev_warn(card->dev, "can't allocate apm buffer\n");
+#endif
+
+	snd_ali_enable_address_interrupt(codec);
+	codec->hw_initialized = 1;
+
+	*r_ali = codec;
+	dev_dbg(card->dev, "created.\n");
+	return 0;
+}
+
+static int snd_ali_probe(struct pci_dev *pci,
+			 const struct pci_device_id *pci_id)
+{
+	struct snd_card *card;
+	struct snd_ali *codec;
+	int err;
+
+	dev_dbg(&pci->dev, "probe ...\n");
+
+	err = snd_card_new(&pci->dev, index, id, THIS_MODULE, 0, &card);
+	if (err < 0)
+		return err;
+
+	err = snd_ali_create(card, pci, pcm_channels, spdif, &codec);
+	if (err < 0)
+		goto error;
+	card->private_data = codec;
+
+	dev_dbg(&pci->dev, "mixer building ...\n");
+	err = snd_ali_mixer(codec);
+	if (err < 0)
+		goto error;
+	
+	dev_dbg(&pci->dev, "pcm building ...\n");
+	err = snd_ali_build_pcms(codec);
+	if (err < 0)
+		goto error;
+
+	snd_ali_proc_init(codec);
+
+	strcpy(card->driver, "ALI5451");
+	strcpy(card->shortname, "ALI 5451");
+	
+	sprintf(card->longname, "%s at 0x%lx, irq %i",
+		card->shortname, codec->port, codec->irq);
+
+	dev_dbg(&pci->dev, "register card.\n");
+	err = snd_card_register(card);
+	if (err < 0)
+		goto error;
+
+	pci_set_drvdata(pci, card);
+	return 0;
+
+ error:
+	snd_card_free(card);
+	return err;
+}
+
+static void snd_ali_remove(struct pci_dev *pci)
+{
+	snd_card_free(pci_get_drvdata(pci));
+}
+
+static struct pci_driver ali5451_driver = {
+	.name = KBUILD_MODNAME,
+	.id_table = snd_ali_ids,
+	.probe = snd_ali_probe,
+	.remove = snd_ali_remove,
+	.driver = {
+		.pm = ALI_PM_OPS,
+	},
+};                                
+
+module_pci_driver(ali5451_driver);