Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 2282 insertions, 0 deletions

diff --git a/sound/pci/ali5451/ali5451.c b/sound/pci/ali5451/ali5451.c
new file mode 100644
index 000000000000..984d5d4ba4e1
--- /dev/null
+++ b/sound/pci/ali5451/ali5451.c
@@ -0,0 +1,2282 @@
+/*
+ *  Matt Wu <Matt_Wu@acersoftech.com.cn>
+ *  Apr 26, 2001
+ *  Routines for control of ALi pci audio M5451
+ *
+ *  BUGS:
+ *    --
+ *
+ *  TODO:
+ *    --
+ *
+ *   This program is free software; you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public Lcodecnse as published by
+ *   the Free Software Foundation; either version 2 of the Lcodecnse, or
+ *   (at your option) any later version.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *   GNU General Public Lcodecnse for more details.
+ *
+ *   You should have received a copy of the GNU General Public Lcodecnse
+ *   along with this program; if not, write to the Free Software
+ *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
+ *
+ */
+
+#include <sound/driver.h>
+#include <asm/io.h>
+#include <linux/delay.h>
+#include <linux/interrupt.h>
+#include <linux/init.h>
+#include <linux/pci.h>
+#include <linux/slab.h>
+#include <linux/moduleparam.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_CARDS] = SNDRV_DEFAULT_IDX;	/* Index 0-MAX */
+static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;	/* ID for this card */
+static int enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;
+static int pcm_channels[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 32};
+static int spdif[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 0};
+
+module_param_array(index, int, NULL, 0444);
+MODULE_PARM_DESC(index, "Index value for ALI M5451 PCI Audio.");
+module_param_array(id, charp, NULL, 0444);
+MODULE_PARM_DESC(id, "ID string for ALI M5451 PCI Audio.");
+module_param_array(enable, bool, NULL, 0444);
+MODULE_PARM_DESC(enable, "Enable ALI 5451 PCI Audio.");
+module_param_array(pcm_channels, int, NULL, 0444);
+MODULE_PARM_DESC(pcm_channels, "PCM Channels");
+module_param_array(spdif, bool, NULL, 0444);
+MODULE_PARM_DESC(spdif, "Support SPDIF I/O");
+
+/*
+ *  Debug part definitions
+ */
+
+//#define ALI_DEBUG
+
+#ifdef ALI_DEBUG
+#define snd_ali_printk(format, args...) printk(format, ##args);
+#else
+#define snd_ali_printk(format, args...)
+#endif
+
+/*
+ *  Constants definition
+ */
+
+#ifndef PCI_VENDOR_ID_ALI
+#define PCI_VENDOR_ID_ALI	0x10b9
+#endif
+
+#ifndef PCI_DEVICE_ID_ALI_5451
+#define PCI_DEVICE_ID_ALI_5451	0x5451
+#endif
+
+#define DEVICE_ID_ALI5451	((PCI_VENDOR_ID_ALI<<16)|PCI_DEVICE_ID_ALI_5451)
+
+
+#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	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_AC97_GPIO		0x4c
+#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 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)
+
+typedef struct snd_stru_ali ali_t;
+typedef struct snd_ali_stru_voice snd_ali_voice_t;
+
+typedef 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;
+
+} snd_ali_channel_control_t;
+
+struct snd_ali_stru_voice {
+	unsigned int number;
+	unsigned int use: 1,
+	    pcm: 1,
+	    midi: 1,
+	    mode: 1,
+	    synth: 1;
+
+	/* PCM data */
+	ali_t *codec;
+	snd_pcm_substream_t *substream;
+	snd_ali_voice_t *extra;
+	
+	unsigned int running: 1;
+
+	int eso;                /* final ESO value for channel */
+	int count;              /* runtime->period_size */
+
+	/* --- */
+
+	void *private_data;
+	void (*private_free)(void *private_data);
+};
+
+
+typedef struct snd_stru_alidev {
+
+	snd_ali_voice_t voices[ALI_CHANNELS];	
+
+	unsigned int	chcnt;			/* num of opened channels */
+	unsigned int	chmap;			/* bitmap for opened channels */
+	unsigned int synthcount;
+
+} alidev_t;
+
+
+#ifdef CONFIG_PM
+#define ALI_GLOBAL_REGS		56
+#define ALI_CHANNEL_REGS	8
+typedef struct snd_ali_image {
+	unsigned long regs[ALI_GLOBAL_REGS];
+	unsigned long channel_regs[ALI_CHANNELS][ALI_CHANNEL_REGS];
+} ali_image_t;
+#endif
+
+
+struct snd_stru_ali {
+	unsigned long	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;
+
+	snd_card_t	*card;
+	snd_pcm_t	*pcm;
+	alidev_t	synth;
+	snd_ali_channel_control_t chregs;
+
+	/* S/PDIF Mask */
+	unsigned int	spdif_mask;
+
+	unsigned int spurious_irq_count;
+	unsigned int spurious_irq_max_delta;
+
+	ac97_bus_t *ac97_bus;
+	ac97_t *ac97;
+	unsigned short	ac97_ext_id;
+	unsigned short	ac97_ext_status;
+
+	spinlock_t	reg_lock;
+	spinlock_t	voice_alloc;
+
+#ifdef CONFIG_PM
+	ali_image_t *image;
+#endif
+};
+
+static struct pci_device_id snd_ali_ids[] = {
+	{0x10b9, 0x5451, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0, },
+	{0, }
+};
+MODULE_DEVICE_TABLE(pci, snd_ali_ids);
+
+static void snd_ali_clear_voices(ali_t *, unsigned int, unsigned int);
+static unsigned short snd_ali_codec_peek(ali_t *, int, unsigned short);
+static void snd_ali_codec_poke(ali_t *, int, unsigned short, unsigned short);
+
+/*
+ *  Debug Part
+ */
+
+#ifdef ALI_DEBUG
+
+static void ali_read_regs(ali_t *codec, int channel)
+{
+	int i,j;
+	unsigned int dwVal;
+
+	printk("channel %d registers map:\n", channel);
+	outb((unsigned char)(channel & 0x001f), ALI_REG(codec,ALI_GC_CIR));
+
+	printk("    ");
+	for(j=0;j<8;j++)
+		printk("%2.2x       ", j*4);
+	printk("\n");
+
+	for (i=0; i<=0xf8/4;i++) {
+		if(i%8 == 0)
+			printk("%2.2x  ", (i*4/0x10)*0x10);
+		dwVal = inl(ALI_REG(codec,i*4));
+		printk("%8.8x ", dwVal);
+		if ((i+1)%8 == 0)
+			printk("\n");
+	}
+	printk("\n");
+}
+static void ali_read_cfg(unsigned int vendor, unsigned deviceid)
+{
+	unsigned int dwVal;
+	struct pci_dev *pci_dev = NULL;
+	int i,j;
+
+
+        pci_dev = pci_find_device(vendor, deviceid, pci_dev);
+        if (pci_dev == NULL)
+                return ;
+
+	printk("\nM%x PCI CFG\n", deviceid);
+	printk("    ");
+	for(j=0;j<8;j++)
+		printk("%d        ",j);
+	printk("\n");
+
+	for(i=0;i<8;i++) {
+		printk("%d   ",i);
+		for(j=0;j<8;j++)
+		{
+			pci_read_config_dword(pci_dev, i*0x20+j*4, &dwVal);
+			printk("%8.8x ", dwVal);
+		}
+		printk("\n");
+	}
+ }
+static void ali_read_ac97regs(ali_t *codec, int secondary)
+{
+	unsigned short i,j;
+	unsigned short wVal;
+
+	printk("\ncodec %d registers map:\n", secondary);
+
+	printk("    ");
+	for(j=0;j<8;j++)
+		printk("%2.2x   ",j*2);
+	printk("\n");
+
+	for (i=0; i<64;i++) {
+		if(i%8 == 0)
+			printk("%2.2x  ", (i/8)*0x10);
+		wVal = snd_ali_codec_peek(codec, secondary, i*2);
+		printk("%4.4x ", wVal);
+		if ((i+1)%8 == 0)
+			printk("\n");
+	}
+	printk("\n");
+}
+
+#endif
+
+/*
+ *  AC97 ACCESS
+ */
+
+static inline unsigned int snd_ali_5451_peek(ali_t *codec,
+						unsigned int port )
+{
+	return (unsigned int)inl(ALI_REG(codec, port)); 
+}
+
+static inline void snd_ali_5451_poke(	ali_t *codec,
+					unsigned int port,
+					unsigned int val )
+{
+	outl((unsigned int)val, ALI_REG(codec, port));
+}
+
+static int snd_ali_codec_ready(	ali_t *codec,
+				unsigned int port,
+				int sched )
+{
+	unsigned long end_time;
+	unsigned int res;
+	
+	end_time = jiffies + 10 * (HZ >> 2);
+	do {
+		res = snd_ali_5451_peek(codec,port);
+		if (! (res & 0x8000))
+			return 0;
+		if (sched) {
+			set_current_state(TASK_UNINTERRUPTIBLE);
+			schedule_timeout(1);
+		}
+	} while (time_after_eq(end_time, jiffies));
+	snd_ali_5451_poke(codec, port, res & ~0x8000);
+	snd_printdd("ali_codec_ready: codec is not ready.\n ");
+	return -EIO;
+}
+
+static int snd_ali_stimer_ready(ali_t *codec, int sched)
+{
+	unsigned long end_time;
+	unsigned long dwChk1,dwChk2;
+	
+	dwChk1 = snd_ali_5451_peek(codec, ALI_STIMER);
+	dwChk2 = snd_ali_5451_peek(codec, ALI_STIMER);
+
+	end_time = jiffies + 10 * (HZ >> 2);
+	do {
+		dwChk2 = snd_ali_5451_peek(codec, ALI_STIMER);
+		if (dwChk2 != dwChk1)
+			return 0;
+		if (sched) {
+			set_current_state(TASK_UNINTERRUPTIBLE);
+			schedule_timeout(1);
+		}
+	} while (time_after_eq(end_time, jiffies));
+	snd_printk("ali_stimer_read: stimer is not ready.\n");
+	return -EIO;
+}
+
+static void snd_ali_codec_poke(ali_t *codec,int secondary,
+				     unsigned short reg,
+				     unsigned short val)
+{
+	unsigned int dwVal = 0;
+	unsigned int port = 0;
+
+	if (reg >= 0x80) {
+		snd_printk("ali_codec_poke: reg(%xh) invalid.\n", reg);
+		return;
+	}
+
+	port = codec->chregs.regs.ac97write;
+
+	if (snd_ali_codec_ready(codec, port, 0) < 0)
+		return;
+	if (snd_ali_stimer_ready(codec, 0) < 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( ali_t *codec,
+					  int secondary,
+					  unsigned short reg)
+{
+	unsigned int dwVal = 0;
+	unsigned int port = 0;
+
+	if (reg >= 0x80) {
+		snd_printk("ali_codec_peek: reg(%xh) invalid.\n", reg);
+		return ~0;
+	}
+
+	port = codec->chregs.regs.ac97read;
+
+	if (snd_ali_codec_ready(codec, port, 0) < 0)
+		return ~0;
+	if (snd_ali_stimer_ready(codec, 0) < 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) < 0)
+		return ~0;
+	if (snd_ali_codec_ready(codec, port, 0) < 0)
+		return ~0;
+	
+	return (snd_ali_5451_peek(codec, port) & 0xffff0000)>>16;
+}
+
+static void snd_ali_codec_write(ac97_t *ac97,
+				unsigned short reg,
+				unsigned short val )
+{
+	ali_t *codec = ac97->private_data;
+
+	snd_ali_printk("codec_write: reg=%xh data=%xh.\n", reg, val);
+	snd_ali_codec_poke(codec, 0, reg, val);
+	return ;
+}
+
+
+static unsigned short snd_ali_codec_read(ac97_t *ac97, unsigned short reg)
+{
+	ali_t *codec = ac97->private_data;
+
+	snd_ali_printk("codec_read reg=%xh.\n", reg);
+	return (snd_ali_codec_peek(codec, 0, reg));
+}
+
+/*
+ *	AC97 Reset
+ */
+
+static int snd_ali_reset_5451(ali_t *codec)
+{
+	struct pci_dev *pci_dev = NULL;
+	unsigned short wCount, wReg;
+	unsigned int   dwVal;
+	
+	if ((pci_dev = codec->pci_m1533) != NULL) {
+		pci_read_config_dword(pci_dev, 0x7c, &dwVal);
+		pci_write_config_dword(pci_dev, 0x7c, dwVal | 0x08000000);
+		udelay(5000);
+		pci_read_config_dword(pci_dev, 0x7c, &dwVal);
+		pci_write_config_dword(pci_dev, 0x7c, dwVal & 0xf7ffffff);
+		udelay(5000);
+	}
+	
+	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);
+	udelay(5000);
+	
+	wCount = 200;
+	while(wCount--) {
+		wReg = snd_ali_codec_peek(codec, 0, AC97_POWERDOWN);
+		if((wReg & 0x000f) == 0x000f)
+			return 0;
+		udelay(5000);
+	}
+
+	/* non-fatal if you have a non PM capable codec */
+	/* snd_printk(KERN_WARNING "ali5451: reset time out\n"); */
+	return 0;
+}
+
+#ifdef CODEC_RESET
+
+static int snd_ali_reset_codec(ali_t *codec)
+{
+	struct pci_dev *pci_dev = NULL;
+	unsigned char bVal = 0;
+	unsigned int   dwVal;
+	unsigned short wCount, wReg;
+
+	pci_dev = codec->pci_m1533;
+	
+	pci_read_config_dword(pci_dev, 0x7c, &dwVal);
+	pci_write_config_dword(pci_dev, 0x7c, dwVal | 0x08000000);
+	udelay(5000);
+	pci_read_config_dword(pci_dev, 0x7c, &dwVal);
+	pci_write_config_dword(pci_dev, 0x7c, dwVal & 0xf7ffffff);
+	udelay(5000);
+
+	bVal = inb(ALI_REG(codec,ALI_SCTRL));
+	bVal |= 0x02;
+	outb(ALI_REG(codec,ALI_SCTRL),bVal);
+	udelay(5000);
+	bVal = inb(ALI_REG(codec,ALI_SCTRL));
+	bVal &= 0xfd;
+	outb(ALI_REG(codec,ALI_SCTRL),bVal);
+	udelay(15000);
+
+	wCount = 200;
+	while(wCount--) {
+		wReg = snd_ali_codec_read(codec->ac97, AC97_POWERDOWN);
+		if((wReg & 0x000f) == 0x000f)
+			return 0;
+		udelay(5000);
+	}
+	return -1;
+}
+
+#endif
+
+/*
+ *  ALI 5451 Controller
+ */
+
+static void snd_ali_enable_special_channel(ali_t *codec, unsigned int channel)
+{
+	unsigned long dwVal = 0;
+
+	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(ali_t *codec, unsigned int channel)
+{
+	unsigned long dwVal = 0;
+
+	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(ali_t * 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(ali_t * 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));
+}
+
+#if 0 // not used
+static void snd_ali_enable_voice_irq(ali_t *codec, unsigned int channel)
+{
+	unsigned int mask;
+	snd_ali_channel_control_t *pchregs = &(codec->chregs);
+
+	snd_ali_printk("enable_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));
+}
+#endif
+
+static void snd_ali_disable_voice_irq(ali_t *codec, unsigned int channel)
+{
+	unsigned int mask;
+	snd_ali_channel_control_t *pchregs = &(codec->chregs);
+
+	snd_ali_printk("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(ali_t *codec, int channel)
+{
+	unsigned int idx =  channel & 0x1f;
+
+	if (codec->synth.chcnt >= ALI_CHANNELS){
+		snd_printk("ali_alloc_pcm_channel: no free channels.\n");
+		return -1;
+	}
+
+	if (!(codec->synth.chmap & (1 << idx))) {
+		codec->synth.chmap |= 1 << idx;
+		codec->synth.chcnt++;
+		snd_ali_printk("alloc_pcm_channel no. %d.\n",idx);
+		return idx;
+	}
+	return -1;
+}
+
+static int snd_ali_find_free_channel(ali_t * codec, int rec)
+{
+	int idx;
+	int result = -1;
+
+	snd_ali_printk("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;
+
+		if ((result = snd_ali_alloc_pcm_channel(codec,idx)) >= 0) {
+			return result;
+		} else {
+			snd_printk("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;
+		if ((result = snd_ali_alloc_pcm_channel(codec,idx)) >= 0) {
+			return result;
+		} else {
+			snd_printk("ali_find_free_channel: S/PDIF out channel is in busy now.\n");
+		}
+	}
+
+	for (idx = 0; idx < ALI_CHANNELS; idx++) {
+		if ((result = snd_ali_alloc_pcm_channel(codec,idx)) >= 0)
+			return result;
+	}
+	snd_printk("ali_find_free_channel: no free channels.\n");
+	return -1;
+}
+
+static void snd_ali_free_channel_pcm(ali_t *codec, int channel)
+{
+	unsigned int idx = channel & 0x0000001f;
+
+	snd_ali_printk("free_channel_pcm channel=%d\n",channel);
+
+	if (channel < 0 || channel >= ALI_CHANNELS)
+		return;
+
+	if (!(codec->synth.chmap & (1 << idx))) {
+		snd_printk("ali_free_channel_pcm: channel %d is not in use.\n",channel);
+		return;
+	} else {
+		codec->synth.chmap &= ~(1 << idx);
+		codec->synth.chcnt--;
+	}
+}
+
+#if 0 // not used
+static void snd_ali_start_voice(ali_t * codec, unsigned int channel)
+{
+	unsigned int mask = 1 << (channel & 0x1f);
+	
+	snd_ali_printk("start_voice: channel=%d\n",channel);
+	outl(mask, ALI_REG(codec,codec->chregs.regs.start));
+}
+#endif
+
+static void snd_ali_stop_voice(ali_t * codec, unsigned int channel)
+{
+	unsigned int mask = 1 << (channel & 0x1f);
+
+	snd_ali_printk("stop_voice: channel=%d\n",channel);
+	outl(mask, ALI_REG(codec, codec->chregs.regs.stop));
+}
+
+/*
+ *    S/PDIF Part
+ */
+
+static void snd_ali_delay(ali_t *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, 1) < 0)
+			break;
+		currenttimer = inl(ALI_REG(codec,  ALI_STIMER));
+	}
+}
+
+static void snd_ali_detect_spdif_rate(ali_t *codec)
+{
+	u16 wval  = 0;
+	u16 count = 0;
+	u8  bval = 0, R1 = 0, R2 = 0;
+
+	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) {
+		snd_printk("ali_detect_spdif_rate: timeout!\n");
+		return;
+	}
+
+	count = 0;
+	while (count++ <= 50000) {
+		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) {
+		snd_printk("ali_detect_spdif_rate: timeout!\n");
+		return;
+	}
+
+	if (R2 >= 0x0b && R2 <= 0x0e) {
+		wval  = inw(ALI_REG(codec,ALI_SPDIF_CTRL + 2));
+		wval &= 0xE0F0;
+		wval |= (u16)0x09 << 8 | (u16)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 |= (u16)0x0E << 8 | (u16)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(ali_t *codec)
+{
+	u32	dwRate = 0;
+	u8	bval = 0;
+
+	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;
+
+	if (bval == 0) dwRate = 44100;
+	if (bval == 1) dwRate = 48000;
+	if (bval == 2) dwRate = 32000;
+
+	return dwRate;
+}
+
+static void snd_ali_enable_spdif_in(ali_t *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(ali_t *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(ali_t *codec, unsigned int rate)
+{
+	unsigned char  bVal;
+	unsigned int  dwRate = 0;
+	
+	if (rate == 32000) dwRate = 0x300;
+	if (rate == 44100) dwRate = 0;
+	if (rate == 48000) dwRate = 0x200;
+	
+	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(ali_t *codec)
+{
+	unsigned short wVal;
+	unsigned char bVal;
+
+        struct pci_dev *pci_dev = NULL;
+
+        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(ali_t *codec)
+{
+	unsigned short wVal = 0;
+
+	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(ali_t *codec)
+{
+	unsigned short wVal = 0;
+  	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(ali_t *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(ali_t *codec,int channel)
+{
+	snd_ali_voice_t *pvoice = NULL;
+	snd_pcm_runtime_t *runtime;
+	snd_ali_channel_control_t *pchregs = NULL;
+	unsigned int old, mask;
+#ifdef ALI_DEBUG
+	unsigned int temp, cspf;
+#endif
+
+	pchregs = &(codec->chregs);
+
+	// check if interrupt occurred for channel
+	old  = pchregs->data.aint;
+	mask = ((unsigned int) 1L) << (channel & 0x1f);
+
+	if (!(old & mask))
+		return;
+
+	pvoice = &codec->synth.voices[channel];
+	runtime = pvoice->substream->runtime;
+
+	udelay(100);
+	spin_lock(&codec->reg_lock);
+
+	if (pvoice->pcm && pvoice->substream) {
+		/* pcm interrupt */
+#ifdef ALI_DEBUG
+		outb((u8)(pvoice->number), ALI_REG(codec, ALI_GC_CIR));
+		temp = inw(ALI_REG(codec, ALI_CSO_ALPHA_FMS + 2));
+		cspf = (inl(ALI_REG(codec, ALI_CSPF)) & mask) == mask;
+#endif
+		if (pvoice->running) {
+			snd_ali_printk("update_ptr: cso=%4.4x cspf=%d.\n",(u16)temp,cspf);
+			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 void snd_ali_interrupt(ali_t * codec)
+{
+	int channel;
+	unsigned int audio_int;
+	snd_ali_channel_control_t *pchregs = NULL;
+	pchregs = &(codec->chregs);
+
+	audio_int = inl(ALI_REG(codec, ALI_MISCINT));
+	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));
+}
+
+
+static irqreturn_t snd_ali_card_interrupt(int irq,
+				   void *dev_id,
+				   struct pt_regs *regs)
+{
+	ali_t 	*codec = dev_id;
+
+	if (codec == NULL)
+		return IRQ_NONE;
+	snd_ali_interrupt(codec);
+	return IRQ_HANDLED;
+}
+
+
+static snd_ali_voice_t *snd_ali_alloc_voice(ali_t * codec, int type, int rec)
+{
+	snd_ali_voice_t *pvoice = NULL;
+	unsigned long flags;
+	int idx;
+
+	snd_ali_printk("alloc_voice: type=%d rec=%d\n",type,rec);
+
+	spin_lock_irqsave(&codec->voice_alloc, flags);
+	if (type == SNDRV_ALI_VOICE_TYPE_PCM) {
+		idx = snd_ali_find_free_channel(codec,rec);
+		if(idx < 0) {
+			snd_printk("ali_alloc_voice: err.\n");
+			spin_unlock_irqrestore(&codec->voice_alloc, flags);
+			return NULL;
+		}
+		pvoice = &(codec->synth.voices[idx]);
+		pvoice->use = 1;
+		pvoice->pcm = 1;
+		pvoice->mode = rec;
+		spin_unlock_irqrestore(&codec->voice_alloc, flags);
+		return pvoice;
+	}
+	spin_unlock_irqrestore(&codec->voice_alloc, flags);
+	return NULL;
+}
+
+
+static void snd_ali_free_voice(ali_t * codec, snd_ali_voice_t *pvoice)
+{
+	unsigned long flags;
+	void (*private_free)(void *);
+	void *private_data;
+
+	snd_ali_printk("free_voice: channel=%d\n",pvoice->number);
+	if (pvoice == NULL || !pvoice->use)
+		return;
+	snd_ali_clear_voices(codec, pvoice->number, pvoice->number);
+	spin_lock_irqsave(&codec->voice_alloc, flags);
+	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_irqrestore(&codec->voice_alloc, flags);
+	if (private_free)
+		private_free(private_data);
+}
+
+
+static void snd_ali_clear_voices(ali_t * 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(ali_t * 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(snd_pcm_substream_t *substream)
+{
+	unsigned int CTRL;
+	snd_pcm_runtime_t *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_ioctl(snd_pcm_substream_t * substream,
+				  unsigned int cmd, void *arg)
+{
+	return snd_pcm_lib_ioctl(substream, cmd, arg);
+}
+
+static int snd_ali_trigger(snd_pcm_substream_t *substream,
+			       int cmd)
+				    
+{
+	ali_t *codec = snd_pcm_substream_chip(substream);
+	struct list_head *pos;
+	snd_pcm_substream_t *s;
+	unsigned int what, whati, capture_flag;
+	snd_ali_voice_t *pvoice = NULL, *evoice = NULL;
+	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 = capture_flag = 0;
+	snd_pcm_group_for_each(pos, substream) {
+		s = snd_pcm_group_substream_entry(pos);
+		if ((ali_t *) snd_pcm_substream_chip(s) == codec) {
+			pvoice = (snd_ali_voice_t *) 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);
+			if (pvoice->mode)
+				capture_flag = 1;
+		}
+	}
+	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));
+	}
+	snd_ali_printk("trigger: what=%xh whati=%xh\n",what,whati);
+	spin_unlock(&codec->reg_lock);
+
+	return 0;
+}
+
+static int snd_ali_playback_hw_params(snd_pcm_substream_t * substream,
+				 snd_pcm_hw_params_t * hw_params)
+{
+	ali_t *codec = snd_pcm_substream_chip(substream);
+	snd_pcm_runtime_t *runtime = substream->runtime;
+	snd_ali_voice_t *pvoice = (snd_ali_voice_t *) runtime->private_data;
+	snd_ali_voice_t *evoice = pvoice->extra;
+	int err;
+	err = snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(hw_params));
+	if (err < 0) return err;
+	
+	/* voice management */
+
+	if (params_buffer_size(hw_params)/2 != params_period_size(hw_params)) {
+		if (evoice == NULL) {
+			evoice = snd_ali_alloc_voice(codec, SNDRV_ALI_VOICE_TYPE_PCM, 0);
+			if (evoice == NULL)
+				return -ENOMEM;
+			pvoice->extra = evoice;
+			evoice->substream = substream;
+		}
+	} else {
+		if (evoice != NULL) {
+			snd_ali_free_voice(codec, evoice);
+			pvoice->extra = evoice = NULL;
+		}
+	}
+
+	return 0;
+}
+
+static int snd_ali_playback_hw_free(snd_pcm_substream_t * substream)
+{
+	ali_t *codec = snd_pcm_substream_chip(substream);
+	snd_pcm_runtime_t *runtime = substream->runtime;
+	snd_ali_voice_t *pvoice = (snd_ali_voice_t *) runtime->private_data;
+	snd_ali_voice_t *evoice = pvoice ? pvoice->extra : NULL;
+
+	snd_pcm_lib_free_pages(substream);
+	if (evoice != NULL) {
+		snd_ali_free_voice(codec, evoice);
+		pvoice->extra = NULL;
+	}
+	return 0;
+}
+
+static int snd_ali_capture_hw_params(snd_pcm_substream_t * substream,
+				 snd_pcm_hw_params_t * hw_params)
+{
+	return snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(hw_params));
+}
+
+static int snd_ali_capture_hw_free(snd_pcm_substream_t * substream)
+{
+	return snd_pcm_lib_free_pages(substream);
+}
+
+static int snd_ali_playback_prepare(snd_pcm_substream_t * substream)
+{
+	ali_t *codec = snd_pcm_substream_chip(substream);
+	snd_pcm_runtime_t *runtime = substream->runtime;
+	snd_ali_voice_t *pvoice = (snd_ali_voice_t *) runtime->private_data;
+	snd_ali_voice_t *evoice = pvoice->extra;
+	unsigned long flags;
+
+	unsigned int LBA;
+	unsigned int Delta;
+	unsigned int ESO;
+	unsigned int CTRL;
+	unsigned int GVSEL;
+	unsigned int PAN;
+	unsigned int VOL;
+	unsigned int EC;
+	
+	snd_ali_printk("playback_prepare ...\n");
+
+	spin_lock_irqsave(&codec->reg_lock, flags);	
+	
+	/* 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; 
+
+	snd_ali_printk("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;
+	snd_ali_printk("playback_prepare:\n    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 != NULL) {
+		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,
+				     (unsigned int)0x7f,
+				     (unsigned int)0x3ff,
+				     CTRL,
+				     EC);
+	}
+	spin_unlock_irqrestore(&codec->reg_lock, flags);
+	return 0;
+}
+
+
+static int snd_ali_capture_prepare(snd_pcm_substream_t * substream)
+{
+	ali_t *codec = snd_pcm_substream_chip(substream);
+	snd_pcm_runtime_t *runtime = substream->runtime;
+	snd_ali_voice_t *pvoice = (snd_ali_voice_t *) runtime->private_data;
+	unsigned long flags;
+	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_irqsave(&codec->reg_lock, flags);
+
+	snd_ali_printk("capture_prepare...\n");
+
+	snd_ali_enable_special_channel(codec,pvoice->number);
+
+	Delta = snd_ali_convert_rate(runtime->rate, 1);
+
+	// Prepare capture intr channel
+	if (pvoice->number == ALI_SPDIF_IN_CHANNEL) {
+
+		unsigned int rate;
+		
+		if (codec->revision != ALI_5451_V02) {
+			spin_unlock_irqrestore(&codec->reg_lock, flags);			
+			return -1;
+		}
+		rate = snd_ali_get_spdif_in_rate(codec);
+		if (rate == 0) {
+			snd_printk("ali_capture_preapre: spdif rate detect err!\n");
+			rate = 48000;
+		}
+		bValue = inb(ALI_REG(codec,ALI_SPDIF_CTRL));
+		if (bValue & 0x10) {
+			outb(bValue,ALI_REG(codec,ALI_SPDIF_CTRL));
+			printk("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_irqrestore(&codec->reg_lock, flags);
+
+	return 0;
+}
+
+
+static snd_pcm_uframes_t snd_ali_playback_pointer(snd_pcm_substream_t *substream)
+{
+	ali_t *codec = snd_pcm_substream_chip(substream);
+	snd_pcm_runtime_t *runtime = substream->runtime;
+	snd_ali_voice_t *pvoice = (snd_ali_voice_t *) 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);
+	snd_ali_printk("playback pointer returned cso=%xh.\n", cso);
+
+	return cso;
+}
+
+
+static snd_pcm_uframes_t snd_ali_capture_pointer(snd_pcm_substream_t *substream)
+{
+	ali_t *codec = snd_pcm_substream_chip(substream);
+	snd_pcm_runtime_t *runtime = substream->runtime;
+	snd_ali_voice_t *pvoice = (snd_ali_voice_t *) runtime->private_data;
+	unsigned int cso;
+	unsigned long flags;
+
+	spin_lock_irqsave(&codec->reg_lock, flags);
+	if (!pvoice->running) {
+		spin_unlock_irqrestore(&codec->reg_lock, flags);
+		return 0;
+	}
+	outb(pvoice->number, ALI_REG(codec, ALI_GC_CIR));
+	cso = inw(ALI_REG(codec, ALI_CSO_ALPHA_FMS + 2));
+	spin_unlock_irqrestore(&codec->reg_lock, flags);
+
+	return cso;
+}
+
+static snd_pcm_hardware_t 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 snd_pcm_hardware_t 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(snd_pcm_runtime_t *runtime)
+{
+	unsigned long flags;
+	snd_ali_voice_t *pvoice = (snd_ali_voice_t *) runtime->private_data;
+	ali_t *codec;
+
+	if (pvoice) {
+		codec = pvoice->codec;
+		spin_lock_irqsave(&codec->reg_lock, flags);
+		snd_ali_free_voice(pvoice->codec, pvoice);
+		spin_unlock_irqrestore(&codec->reg_lock, flags);
+	}
+}
+
+static int snd_ali_playback_open(snd_pcm_substream_t * substream)
+{
+	ali_t *codec = snd_pcm_substream_chip(substream);
+	snd_pcm_runtime_t *runtime = substream->runtime;
+	snd_ali_voice_t *pvoice;
+	unsigned long flags = 0;
+
+	spin_lock_irqsave(&codec->reg_lock, flags);
+	pvoice = snd_ali_alloc_voice(codec, SNDRV_ALI_VOICE_TYPE_PCM, 0);
+	if (pvoice == NULL) {
+		spin_unlock_irqrestore(&codec->reg_lock, flags);
+		return -EAGAIN;
+	}
+	pvoice->codec = codec;
+	spin_unlock_irqrestore(&codec->reg_lock, flags);
+
+	pvoice->substream = substream;
+	runtime->private_data = pvoice;
+	runtime->private_free = snd_ali_pcm_free_substream;
+
+	runtime->hw = snd_ali_playback;
+	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_capture_open(snd_pcm_substream_t * substream)
+{
+	ali_t *codec = snd_pcm_substream_chip(substream);
+	snd_pcm_runtime_t *runtime = substream->runtime;
+	snd_ali_voice_t *pvoice;
+	unsigned long flags;
+
+	spin_lock_irqsave(&codec->reg_lock, flags);
+	pvoice = snd_ali_alloc_voice(codec, SNDRV_ALI_VOICE_TYPE_PCM, 1);
+	if (pvoice == NULL) {
+		spin_unlock_irqrestore(&codec->reg_lock, flags);
+		return -EAGAIN;
+	}
+	pvoice->codec = codec;
+	spin_unlock_irqrestore(&codec->reg_lock, flags);
+
+	pvoice->substream = substream;
+	runtime->private_data = pvoice;
+	runtime->private_free = snd_ali_pcm_free_substream;
+	runtime->hw = snd_ali_capture;
+	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_close(snd_pcm_substream_t * substream)
+{
+	return 0;
+}
+
+static int snd_ali_capture_close(snd_pcm_substream_t * substream)
+{
+	ali_t *codec = snd_pcm_substream_chip(substream);
+	snd_pcm_runtime_t *runtime = substream->runtime;
+	snd_ali_voice_t *pvoice = (snd_ali_voice_t *) runtime->private_data;
+
+	snd_ali_disable_special_channel(codec,pvoice->number);
+
+	return 0;
+}
+
+static snd_pcm_ops_t snd_ali_playback_ops = {
+	.open =		snd_ali_playback_open,
+	.close =	snd_ali_playback_close,
+	.ioctl =	snd_ali_ioctl,
+	.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 snd_pcm_ops_t snd_ali_capture_ops = {
+	.open =		snd_ali_capture_open,
+	.close =	snd_ali_capture_close,
+	.ioctl =	snd_ali_ioctl,
+	.hw_params =	snd_ali_capture_hw_params,
+	.hw_free =	snd_ali_capture_hw_free,
+	.prepare =	snd_ali_capture_prepare,
+	.trigger =	snd_ali_trigger,
+	.pointer =	snd_ali_capture_pointer,
+};
+
+
+static void snd_ali_pcm_free(snd_pcm_t *pcm)
+{
+	ali_t *codec = pcm->private_data;
+	codec->pcm = NULL;
+}
+
+static int __devinit snd_ali_pcm(ali_t * codec, int device, snd_pcm_t ** rpcm)
+{
+	snd_pcm_t *pcm;
+	int err;
+
+	if (rpcm) *rpcm = NULL;
+	err = snd_pcm_new(codec->card, "ALI 5451", device, ALI_CHANNELS, 1, &pcm);
+	if (err < 0) {
+		snd_printk("snd_ali_pcm: err called snd_pcm_new.\n");
+		return err;
+	}
+	pcm->private_data = codec;
+	pcm->private_free = snd_ali_pcm_free;
+	pcm->info_flags = 0;
+	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_ali_playback_ops);
+	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_ali_capture_ops);
+
+	snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
+					      snd_dma_pci_data(codec->pci), 64*1024, 128*1024);
+
+	pcm->info_flags = 0;
+	pcm->dev_subclass = SNDRV_PCM_SUBCLASS_GENERIC_MIX;
+	strcpy(pcm->name, "ALI 5451");
+	codec->pcm = pcm;
+	if (rpcm) *rpcm = pcm;
+	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}
+
+static int snd_ali5451_spdif_info(snd_kcontrol_t *kcontrol, snd_ctl_elem_info_t *uinfo)
+{
+        uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
+        uinfo->count = 1;
+        uinfo->value.integer.min = 0;
+        uinfo->value.integer.max = 1;
+        return 0;
+}
+
+static int snd_ali5451_spdif_get(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol)
+{
+	unsigned long flags;
+	ali_t *codec = kcontrol->private_data;
+	unsigned int enable;
+
+	enable = ucontrol->value.integer.value[0] ? 1 : 0;
+
+	spin_lock_irqsave(&codec->reg_lock, flags);
+	switch(kcontrol->private_value) {
+	case 0:
+		enable = (codec->spdif_mask & 0x02) ? 1 : 0;
+		break;
+	case 1:
+		enable = ((codec->spdif_mask & 0x02) && (codec->spdif_mask & 0x04)) ? 1 : 0;
+		break;
+	case 2:
+		enable = (codec->spdif_mask & 0x01) ? 1 : 0;
+		break;
+	default:
+		break;
+	}
+	ucontrol->value.integer.value[0] = enable;
+	spin_unlock_irqrestore(&codec->reg_lock, flags);
+	return 0;
+}
+
+static int snd_ali5451_spdif_put(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol)
+{
+	unsigned long flags;
+	ali_t *codec = kcontrol->private_data;
+	unsigned int change = 0, enable = 0;
+
+	enable = ucontrol->value.integer.value[0] ? 1 : 0;
+
+	spin_lock_irqsave(&codec->reg_lock, flags);
+	switch (kcontrol->private_value) {
+	case 0:
+		change = (codec->spdif_mask & 0x02) ? 1 : 0;
+		change = change ^ enable;
+		if (change) {
+			if (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 ^ enable;
+		if (change && (codec->spdif_mask & 0x02)) {
+			if (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 ^ enable;
+		if (change) {
+			if (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_irqrestore(&codec->reg_lock, flags);
+	
+	return change;
+}
+
+static snd_kcontrol_new_t snd_ali5451_mixer_spdif[] __devinitdata = {
+	/* spdif aplayback switch */
+	/* FIXME: "IEC958 Playback Switch" may conflict with one on ac97_codec */
+	ALI5451_SPDIF("IEC958 Output switch", 0, 0),
+	/* spdif out to spdif channel */
+	ALI5451_SPDIF("IEC958 Channel Output Switch", 0, 1),
+	/* spdif in from spdif channel */
+	ALI5451_SPDIF(SNDRV_CTL_NAME_IEC958("",CAPTURE,SWITCH), 0, 2)
+};
+
+static void snd_ali_mixer_free_ac97_bus(ac97_bus_t *bus)
+{
+	ali_t *codec = bus->private_data;
+	codec->ac97_bus = NULL;
+}
+
+static void snd_ali_mixer_free_ac97(ac97_t *ac97)
+{
+	ali_t *codec = ac97->private_data;
+	codec->ac97 = NULL;
+}
+
+static int __devinit snd_ali_mixer(ali_t * codec)
+{
+	ac97_template_t ac97;
+	unsigned int idx;
+	int err;
+	static ac97_bus_ops_t ops = {
+		.write = snd_ali_codec_write,
+		.read = snd_ali_codec_read,
+	};
+
+	if ((err = snd_ac97_bus(codec->card, 0, &ops, codec, &codec->ac97_bus)) < 0)
+		return err;
+	codec->ac97_bus->private_free = snd_ali_mixer_free_ac97_bus;
+
+	memset(&ac97, 0, sizeof(ac97));
+	ac97.private_data = codec;
+	ac97.private_free = snd_ali_mixer_free_ac97;
+	if ((err = snd_ac97_mixer(codec->ac97_bus, &ac97, &codec->ac97)) < 0) {
+		snd_printk("ali mixer creating error.\n");
+		return err;
+	}
+	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
+static int ali_suspend(snd_card_t *card, pm_message_t state)
+{
+	ali_t *chip = card->pm_private_data;
+	ali_image_t *im;
+	int i, j;
+
+	im = chip->image;
+	if (! im)
+		return 0;
+
+	snd_pcm_suspend_all(chip->pcm);
+	snd_ac97_suspend(chip->ac97);
+
+	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);
+	pci_disable_device(chip->pci);
+	return 0;
+}
+
+static int ali_resume(snd_card_t *card)
+{
+	ali_t *chip = card->pm_private_data;
+	ali_image_t *im;
+	int i, j;
+
+	im = chip->image;
+	if (! im)
+		return 0;
+
+	pci_enable_device(chip->pci);
+
+	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);
+
+	snd_ac97_resume(chip->ac97);
+	
+	return 0;
+}
+#endif /* CONFIG_PM */
+
+static int snd_ali_free(ali_t * codec)
+{
+	if (codec->hw_initialized)
+		snd_ali_disable_address_interrupt(codec);
+	if (codec->irq >= 0) {
+		synchronize_irq(codec->irq);
+		free_irq(codec->irq, (void *)codec);
+	}
+	if (codec->port)
+		pci_release_regions(codec->pci);
+	pci_disable_device(codec->pci);
+#ifdef CONFIG_PM
+	kfree(codec->image);
+#endif
+	kfree(codec);
+	return 0;
+}
+
+static int snd_ali_chip_init(ali_t *codec)
+{
+	unsigned int legacy;
+	unsigned char temp;
+	struct pci_dev *pci_dev = NULL;
+
+	snd_ali_printk("chip initializing ... \n");
+
+	if (snd_ali_reset_5451(codec)) {
+		snd_printk("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;
+	}
+
+	snd_ali_printk("chip initialize succeed.\n");
+	return 0;
+
+}
+
+static int __devinit snd_ali_resources(ali_t *codec)
+{
+	int err;
+
+	snd_ali_printk("resouces allocation ...\n");
+	if ((err = pci_request_regions(codec->pci, "ALI 5451")) < 0)
+		return err;
+	codec->port = pci_resource_start(codec->pci, 0);
+
+	if (request_irq(codec->pci->irq, snd_ali_card_interrupt, SA_INTERRUPT|SA_SHIRQ, "ALI 5451", (void *)codec)) {
+		snd_printk("Unable to request irq.\n");
+		return -EBUSY;
+	}
+	codec->irq = codec->pci->irq;
+	snd_ali_printk("resouces allocated.\n");
+	return 0;
+}
+static int snd_ali_dev_free(snd_device_t *device) 
+{
+	ali_t *codec=device->device_data;
+	snd_ali_free(codec);
+	return 0;
+}
+
+static int __devinit snd_ali_create(snd_card_t * card,
+				    struct pci_dev *pci,
+				    int pcm_streams,
+				    int spdif_support,
+				    ali_t ** r_ali)
+{
+	ali_t *codec;
+	int i, err;
+	unsigned short cmdw = 0;
+	struct pci_dev *pci_dev = NULL;
+        static snd_device_ops_t ops = {
+		(snd_dev_free_t *)snd_ali_dev_free,
+		NULL,
+		NULL
+        };
+
+	*r_ali = NULL;
+
+	snd_ali_printk("creating ...\n");
+
+	/* enable PCI device */
+	if ((err = pci_enable_device(pci)) < 0)
+		return err;
+	/* check, if we can restrict PCI DMA transfers to 31 bits */
+	if (pci_set_dma_mask(pci, 0x7fffffff) < 0 ||
+	    pci_set_consistent_dma_mask(pci, 0x7fffffff) < 0) {
+		snd_printk("architecture does not support 31bit PCI busmaster DMA\n");
+		pci_disable_device(pci);
+		return -ENXIO;
+	}
+
+	if ((codec = kcalloc(1, sizeof(*codec), GFP_KERNEL)) == NULL) {
+		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;
+	pci_read_config_byte(pci, PCI_REVISION_ID, &codec->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;
+	}
+
+	synchronize_irq(pci->irq);
+
+	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 */
+       	pci_dev = pci_find_device(0x10b9, 0x1533, NULL);
+	codec->pci_m1533 = pci_dev;
+	if (! codec->pci_m1533) {
+		snd_printk(KERN_ERR "ali5451: cannot find ALi 1533 chip.\n");
+		snd_ali_free(codec);
+		return -ENODEV;
+	}
+	/* M7101: power management */
+       	pci_dev = pci_find_device(0x10b9, 0x7101, NULL);
+	codec->pci_m7101 = pci_dev;
+	if (! codec->pci_m7101 && codec->revision == ALI_5451_V02) {
+		snd_printk(KERN_ERR "ali5451: cannot find ALi 7101 chip.\n");
+		snd_ali_free(codec);
+		return -ENODEV;
+	}
+
+	snd_ali_printk("snd_device_new is called.\n");
+	if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, codec, &ops)) < 0) {
+		snd_ali_free(codec);
+		return err;
+	}
+
+	/* initialise synth voices*/
+	for (i = 0; i < ALI_CHANNELS; i++ ) {
+		codec->synth.voices[i].number = i;
+	}
+
+	if ((err = snd_ali_chip_init(codec)) < 0) {
+		snd_printk("ali create: chip init error.\n");
+		return err;
+	}
+
+#ifdef CONFIG_PM
+	codec->image = kmalloc(sizeof(*codec->image), GFP_KERNEL);
+	if (! codec->image)
+		snd_printk(KERN_WARNING "can't allocate apm buffer\n");
+	else
+		snd_card_set_pm_callback(card, ali_suspend, ali_resume, codec);
+#endif
+
+	snd_ali_enable_address_interrupt(codec);
+	codec->hw_initialized = 1;
+
+	*r_ali = codec;
+	snd_ali_printk("created.\n");
+	return 0;
+}
+
+static int __devinit snd_ali_probe(struct pci_dev *pci,
+				   const struct pci_device_id *pci_id)
+{
+	static int dev;
+	snd_card_t *card;
+	ali_t *codec;
+	int err;
+
+	snd_ali_printk("probe ...\n");
+
+        if (dev >= SNDRV_CARDS)
+                return -ENODEV;
+	if (!enable[dev]) {
+		dev++;
+		return -ENOENT;
+	}
+
+	card = snd_card_new(index[dev], id[dev], THIS_MODULE, 0);
+	if (card == NULL)
+		return -ENOMEM;
+
+	if ((err = snd_ali_create(card, pci, pcm_channels[dev], spdif[dev], &codec)) < 0) {
+		snd_card_free(card);
+		return err;
+	}
+
+	snd_ali_printk("mixer building ...\n");
+	if ((err = snd_ali_mixer(codec)) < 0) {
+		snd_card_free(card);
+		return err;
+	}
+	
+	snd_ali_printk("pcm building ...\n");
+	if ((err = snd_ali_pcm(codec, 0, NULL)) < 0) {
+		snd_card_free(card);
+		return err;
+	}
+
+	strcpy(card->driver, "ALI5451");
+	strcpy(card->shortname, "ALI 5451");
+	
+	sprintf(card->longname, "%s at 0x%lx, irq %li",
+		card->shortname, codec->port, codec->irq);
+
+	snd_ali_printk("register card.\n");
+	if ((err = snd_card_register(card)) < 0) {
+		snd_card_free(card);
+		return err;
+	}
+	pci_set_drvdata(pci, card);
+	dev++;
+	return 0;
+}
+
+static void __devexit snd_ali_remove(struct pci_dev *pci)
+{
+	snd_card_free(pci_get_drvdata(pci));
+	pci_set_drvdata(pci, NULL);
+}
+
+static struct pci_driver driver = {
+	.name = "ALI 5451",
+	.id_table = snd_ali_ids,
+	.probe = snd_ali_probe,
+	.remove = __devexit_p(snd_ali_remove),
+	SND_PCI_PM_CALLBACKS
+};                                
+
+static int __init alsa_card_ali_init(void)
+{
+	return pci_module_init(&driver);
+}
+
+static void __exit alsa_card_ali_exit(void)
+{
+	pci_unregister_driver(&driver);
+}
+
+module_init(alsa_card_ali_init)
+module_exit(alsa_card_ali_exit)