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, 3658 insertions, 0 deletions

diff --git a/sound/oss/i810_audio.c b/sound/oss/i810_audio.c
new file mode 100644
index 0000000..7e9f667
--- /dev/null
+++ b/sound/oss/i810_audio.c
@@ -0,0 +1,3658 @@
+/*
+ *	Intel i810 and friends ICH driver for Linux
+ *	Alan Cox <alan@redhat.com>
+ *
+ *  Built from:
+ *	Low level code:  Zach Brown (original nonworking i810 OSS driver)
+ *			 Jaroslav Kysela <perex@suse.cz> (working ALSA driver)
+ *
+ *	Framework: Thomas Sailer <sailer@ife.ee.ethz.ch>
+ *	Extended by: Zach Brown <zab@redhat.com>  
+ *			and others..
+ *
+ *  Hardware Provided By:
+ *	Analog Devices (A major AC97 codec maker)
+ *	Intel Corp  (you've probably heard of them already)
+ *
+ *  AC97 clues and assistance provided by
+ *	Analog Devices
+ *	Zach 'Fufu' Brown
+ *	Jeff Garzik
+ *
+ *	This program is free software; you can redistribute it and/or modify
+ *	it under the terms of the GNU General Public License as published by
+ *	the Free Software Foundation; either version 2 of the License, 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 License for more details.
+ *
+ *	You should have received a copy of the GNU General Public License
+ *	along with this program; if not, write to the Free Software
+ *	Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ *
+ *	Intel 810 theory of operation
+ *
+ *	The chipset provides three DMA channels that talk to an AC97
+ *	CODEC (AC97 is a digital/analog mixer standard). At its simplest
+ *	you get 48Khz audio with basic volume and mixer controls. At the
+ *	best you get rate adaption in the codec. We set the card up so
+ *	that we never take completion interrupts but instead keep the card
+ *	chasing its tail around a ring buffer. This is needed for mmap
+ *	mode audio and happens to work rather well for non-mmap modes too.
+ *
+ *	The board has one output channel for PCM audio (supported) and
+ *	a stereo line in and mono microphone input. Again these are normally
+ *	locked to 48Khz only. Right now recording is not finished.
+ *
+ *	There is no midi support, no synth support. Use timidity. To get
+ *	esd working you need to use esd -r 48000 as it won't probe 48KHz
+ *	by default. mpg123 can't handle 48Khz only audio so use xmms.
+ *
+ *	Fix The Sound On Dell
+ *
+ *	Not everyone uses 48KHz. We know of no way to detect this reliably
+ *	and certainly not to get the right data. If your i810 audio sounds
+ *	stupid you may need to investigate other speeds. According to Analog
+ *	they tend to use a 14.318MHz clock which gives you a base rate of
+ *	41194Hz.
+ *
+ *	This is available via the 'ftsodell=1' option. 
+ *
+ *	If you need to force a specific rate set the clocking= option
+ *
+ *	This driver is cursed. (Ben LaHaise)
+ *
+ *  ICH 3 caveats
+ *	Intel errata #7 for ICH3 IO. We need to disable SMI stuff
+ *	when codec probing. [Not Yet Done]
+ *
+ *  ICH 4 caveats
+ *
+ *	The ICH4 has the feature, that the codec ID doesn't have to be 
+ *	congruent with the IO connection.
+ * 
+ *	Therefore, from driver version 0.23 on, there is a "codec ID" <->
+ *	"IO register base offset" mapping (card->ac97_id_map) field.
+ *   
+ *	Juergen "George" Sawinski (jsaw) 
+ */
+ 
+#include <linux/module.h>
+#include <linux/string.h>
+#include <linux/ctype.h>
+#include <linux/ioport.h>
+#include <linux/sched.h>
+#include <linux/delay.h>
+#include <linux/sound.h>
+#include <linux/slab.h>
+#include <linux/soundcard.h>
+#include <linux/pci.h>
+#include <linux/interrupt.h>
+#include <asm/io.h>
+#include <asm/dma.h>
+#include <linux/init.h>
+#include <linux/poll.h>
+#include <linux/spinlock.h>
+#include <linux/smp_lock.h>
+#include <linux/ac97_codec.h>
+#include <linux/bitops.h>
+#include <asm/uaccess.h>
+
+#define DRIVER_VERSION "1.01"
+
+#define MODULOP2(a, b) ((a) & ((b) - 1))
+#define MASKP2(a, b) ((a) & ~((b) - 1))
+
+static int ftsodell;
+static int strict_clocking;
+static unsigned int clocking;
+static int spdif_locked;
+static int ac97_quirk = AC97_TUNE_DEFAULT;
+
+//#define DEBUG
+//#define DEBUG2
+//#define DEBUG_INTERRUPTS
+//#define DEBUG_MMAP
+//#define DEBUG_MMIO
+
+#define ADC_RUNNING	1
+#define DAC_RUNNING	2
+
+#define I810_FMT_16BIT	1
+#define I810_FMT_STEREO	2
+#define I810_FMT_MASK	3
+
+#define SPDIF_ON	0x0004
+#define SURR_ON		0x0010
+#define CENTER_LFE_ON	0x0020
+#define VOL_MUTED	0x8000
+
+/* the 810's array of pointers to data buffers */
+
+struct sg_item {
+#define BUSADDR_MASK	0xFFFFFFFE
+	u32 busaddr;	
+#define CON_IOC 	0x80000000 /* interrupt on completion */
+#define CON_BUFPAD	0x40000000 /* pad underrun with last sample, else 0 */
+#define CON_BUFLEN_MASK	0x0000ffff /* buffer length in samples */
+	u32 control;
+};
+
+/* an instance of the i810 channel */
+#define SG_LEN 32
+struct i810_channel 
+{
+	/* these sg guys should probably be allocated
+	   separately as nocache. Must be 8 byte aligned */
+	struct sg_item sg[SG_LEN];	/* 32*8 */
+	u32 offset;			/* 4 */
+	u32 port;			/* 4 */
+	u32 used;
+	u32 num;
+};
+
+/*
+ * we have 3 separate dma engines.  pcm in, pcm out, and mic.
+ * each dma engine has controlling registers.  These goofy
+ * names are from the datasheet, but make it easy to write
+ * code while leafing through it.
+ *
+ * ICH4 has 6 dma engines, pcm in, pcm out, mic, pcm in 2, 
+ * mic in 2, s/pdif.   Of special interest is the fact that
+ * the upper 3 DMA engines on the ICH4 *must* be accessed
+ * via mmio access instead of pio access.
+ */
+
+#define ENUM_ENGINE(PRE,DIG) 									\
+enum {												\
+	PRE##_BASE =	0x##DIG##0,		/* Base Address */				\
+	PRE##_BDBAR =	0x##DIG##0,		/* Buffer Descriptor list Base Address */	\
+	PRE##_CIV =	0x##DIG##4,		/* Current Index Value */			\
+	PRE##_LVI =	0x##DIG##5,		/* Last Valid Index */				\
+	PRE##_SR =	0x##DIG##6,		/* Status Register */				\
+	PRE##_PICB =	0x##DIG##8,		/* Position In Current Buffer */		\
+	PRE##_PIV =	0x##DIG##a,		/* Prefetched Index Value */			\
+	PRE##_CR =	0x##DIG##b		/* Control Register */				\
+}
+
+ENUM_ENGINE(OFF,0);	/* Offsets */
+ENUM_ENGINE(PI,0);	/* PCM In */
+ENUM_ENGINE(PO,1);	/* PCM Out */
+ENUM_ENGINE(MC,2);	/* Mic In */
+
+enum {
+	GLOB_CNT =	0x2c,			/* Global Control */
+	GLOB_STA = 	0x30,			/* Global Status */
+	CAS	 = 	0x34			/* Codec Write Semaphore Register */
+};
+
+ENUM_ENGINE(MC2,4);     /* Mic In 2 */
+ENUM_ENGINE(PI2,5);     /* PCM In 2 */
+ENUM_ENGINE(SP,6);      /* S/PDIF */
+
+enum {
+	SDM =           0x80                    /* SDATA_IN Map Register */
+};
+
+/* interrupts for a dma engine */
+#define DMA_INT_FIFO		(1<<4)  /* fifo under/over flow */
+#define DMA_INT_COMPLETE	(1<<3)  /* buffer read/write complete and ioc set */
+#define DMA_INT_LVI		(1<<2)  /* last valid done */
+#define DMA_INT_CELV		(1<<1)  /* last valid is current */
+#define DMA_INT_DCH		(1)	/* DMA Controller Halted (happens on LVI interrupts) */
+#define DMA_INT_MASK (DMA_INT_FIFO|DMA_INT_COMPLETE|DMA_INT_LVI)
+
+/* interrupts for the whole chip */
+#define INT_SEC		(1<<11)
+#define INT_PRI		(1<<10)
+#define INT_MC		(1<<7)
+#define INT_PO		(1<<6)
+#define INT_PI		(1<<5)
+#define INT_MO		(1<<2)
+#define INT_NI		(1<<1)
+#define INT_GPI		(1<<0)
+#define INT_MASK (INT_SEC|INT_PRI|INT_MC|INT_PO|INT_PI|INT_MO|INT_NI|INT_GPI)
+
+/* magic numbers to protect our data structures */
+#define I810_CARD_MAGIC		0x5072696E /* "Prin" */
+#define I810_STATE_MAGIC	0x63657373 /* "cess" */
+#define I810_DMA_MASK		0xffffffff /* DMA buffer mask for pci_alloc_consist */
+#define NR_HW_CH		3
+
+/* maxinum number of AC97 codecs connected, AC97 2.0 defined 4 */
+#define NR_AC97                 4
+
+/* Please note that an 8bit mono stream is not valid on this card, you must have a 16bit */
+/* stream at a minimum for this card to be happy */
+static const unsigned sample_size[] = { 1, 2, 2, 4 };
+/* Samples are 16bit values, so we are shifting to a word, not to a byte, hence shift */
+/* values are one less than might be expected */
+static const unsigned sample_shift[] = { -1, 0, 0, 1 };
+
+enum {
+	ICH82801AA = 0,
+	ICH82901AB,
+	INTEL440MX,
+	INTELICH2,
+	INTELICH3,
+	INTELICH4,
+	INTELICH5,
+	SI7012,
+	NVIDIA_NFORCE,
+	AMD768,
+	AMD8111
+};
+
+static char * card_names[] = {
+	"Intel ICH 82801AA",
+	"Intel ICH 82901AB",
+	"Intel 440MX",
+	"Intel ICH2",
+	"Intel ICH3",
+	"Intel ICH4",
+	"Intel ICH5",
+	"SiS 7012",
+	"NVIDIA nForce Audio",
+	"AMD 768",
+	"AMD-8111 IOHub"
+};
+
+/* These are capabilities (and bugs) the chipsets _can_ have */
+static struct {
+	int16_t      nr_ac97;
+#define CAP_MMIO                 0x0001
+#define CAP_20BIT_AUDIO_SUPPORT  0x0002
+	u_int16_t flags;
+} card_cap[] = {
+	{  1, 0x0000 }, /* ICH82801AA */
+	{  1, 0x0000 }, /* ICH82901AB */
+	{  1, 0x0000 }, /* INTEL440MX */
+	{  1, 0x0000 }, /* INTELICH2 */
+	{  2, 0x0000 }, /* INTELICH3 */
+ 	{  3, 0x0003 }, /* INTELICH4 */
+	{  3, 0x0003 }, /* INTELICH5 */
+	/*@FIXME to be verified*/	{  2, 0x0000 }, /* SI7012 */
+	/*@FIXME to be verified*/	{  2, 0x0000 }, /* NVIDIA_NFORCE */
+	/*@FIXME to be verified*/	{  2, 0x0000 }, /* AMD768 */
+	/*@FIXME to be verified*/	{  3, 0x0001 }, /* AMD8111 */
+};
+
+static struct pci_device_id i810_pci_tbl [] = {
+	{PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801AA_5,
+	 PCI_ANY_ID, PCI_ANY_ID, 0, 0, ICH82801AA},
+	{PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801AB_5,
+	 PCI_ANY_ID, PCI_ANY_ID, 0, 0, ICH82901AB},
+	{PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_440MX,
+	 PCI_ANY_ID, PCI_ANY_ID, 0, 0, INTEL440MX},
+	{PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801BA_4,
+	 PCI_ANY_ID, PCI_ANY_ID, 0, 0, INTELICH2},
+	{PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801CA_5,
+	 PCI_ANY_ID, PCI_ANY_ID, 0, 0, INTELICH3},
+	{PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801DB_5,
+	 PCI_ANY_ID, PCI_ANY_ID, 0, 0, INTELICH4},
+	{PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801EB_5,
+	 PCI_ANY_ID, PCI_ANY_ID, 0, 0, INTELICH5},
+	{PCI_VENDOR_ID_SI, PCI_DEVICE_ID_SI_7012,
+	 PCI_ANY_ID, PCI_ANY_ID, 0, 0, SI7012},
+	{PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_MCP1_AUDIO,
+	 PCI_ANY_ID, PCI_ANY_ID, 0, 0, NVIDIA_NFORCE},
+	{PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_MCP2_AUDIO,
+	 PCI_ANY_ID, PCI_ANY_ID, 0, 0, NVIDIA_NFORCE},
+	{PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_MCP3_AUDIO,
+	 PCI_ANY_ID, PCI_ANY_ID, 0, 0, NVIDIA_NFORCE},
+	{PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_OPUS_7445,
+	 PCI_ANY_ID, PCI_ANY_ID, 0, 0, AMD768},
+	{PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_8111_AUDIO,
+	 PCI_ANY_ID, PCI_ANY_ID, 0, 0, AMD8111},
+	{PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ESB_5,
+	 PCI_ANY_ID, PCI_ANY_ID, 0, 0, INTELICH4},
+	{PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH6_18,
+	 PCI_ANY_ID, PCI_ANY_ID, 0, 0, INTELICH4},
+
+	{0,}
+};
+
+MODULE_DEVICE_TABLE (pci, i810_pci_tbl);
+
+#ifdef CONFIG_PM
+#define PM_SUSPENDED(card) (card->pm_suspended)
+#else
+#define PM_SUSPENDED(card) (0)
+#endif
+
+/* "software" or virtual channel, an instance of opened /dev/dsp */
+struct i810_state {
+	unsigned int magic;
+	struct i810_card *card;	/* Card info */
+
+	/* single open lock mechanism, only used for recording */
+	struct semaphore open_sem;
+	wait_queue_head_t open_wait;
+
+	/* file mode */
+	mode_t open_mode;
+
+	/* virtual channel number */
+	int virt;
+
+#ifdef CONFIG_PM
+	unsigned int pm_saved_dac_rate,pm_saved_adc_rate;
+#endif
+	struct dmabuf {
+		/* wave sample stuff */
+		unsigned int rate;
+		unsigned char fmt, enable, trigger;
+
+		/* hardware channel */
+		struct i810_channel *read_channel;
+		struct i810_channel *write_channel;
+
+		/* OSS buffer management stuff */
+		void *rawbuf;
+		dma_addr_t dma_handle;
+		unsigned buforder;
+		unsigned numfrag;
+		unsigned fragshift;
+
+		/* our buffer acts like a circular ring */
+		unsigned hwptr;		/* where dma last started, updated by update_ptr */
+		unsigned swptr;		/* where driver last clear/filled, updated by read/write */
+		int count;		/* bytes to be consumed or been generated by dma machine */
+		unsigned total_bytes;	/* total bytes dmaed by hardware */
+
+		unsigned error;		/* number of over/underruns */
+		wait_queue_head_t wait;	/* put process on wait queue when no more space in buffer */
+
+		/* redundant, but makes calculations easier */
+		/* what the hardware uses */
+		unsigned dmasize;
+		unsigned fragsize;
+		unsigned fragsamples;
+
+		/* what we tell the user to expect */
+		unsigned userfrags;
+		unsigned userfragsize;
+
+		/* OSS stuff */
+		unsigned mapped:1;
+		unsigned ready:1;
+		unsigned update_flag;
+		unsigned ossfragsize;
+		unsigned ossmaxfrags;
+		unsigned subdivision;
+	} dmabuf;
+};
+
+
+struct i810_card {
+	unsigned int magic;
+
+	/* We keep i810 cards in a linked list */
+	struct i810_card *next;
+
+	/* The i810 has a certain amount of cross channel interaction
+	   so we use a single per card lock */
+	spinlock_t lock;
+	
+	/* Control AC97 access serialization */
+	spinlock_t ac97_lock;
+
+	/* PCI device stuff */
+	struct pci_dev * pci_dev;
+	u16 pci_id;
+	u16 pci_id_internal; /* used to access card_cap[] */
+#ifdef CONFIG_PM	
+	u16 pm_suspended;
+	int pm_saved_mixer_settings[SOUND_MIXER_NRDEVICES][NR_AC97];
+#endif
+	/* soundcore stuff */
+	int dev_audio;
+
+	/* structures for abstraction of hardware facilities, codecs, banks and channels*/
+	u16    ac97_id_map[NR_AC97];
+	struct ac97_codec *ac97_codec[NR_AC97];
+	struct i810_state *states[NR_HW_CH];
+	struct i810_channel *channel;	/* 1:1 to states[] but diff. lifetime */
+	dma_addr_t chandma;
+
+	u16 ac97_features;
+	u16 ac97_status;
+	u16 channels;
+	
+	/* hardware resources */
+	unsigned long ac97base;
+	unsigned long iobase;
+	u32 irq;
+
+	unsigned long ac97base_mmio_phys;
+	unsigned long iobase_mmio_phys;
+	u_int8_t __iomem *ac97base_mmio;
+	u_int8_t __iomem *iobase_mmio;
+
+	int           use_mmio;
+	
+	/* Function support */
+	struct i810_channel *(*alloc_pcm_channel)(struct i810_card *);
+	struct i810_channel *(*alloc_rec_pcm_channel)(struct i810_card *);
+	struct i810_channel *(*alloc_rec_mic_channel)(struct i810_card *);
+	void (*free_pcm_channel)(struct i810_card *, int chan);
+
+	/* We have a *very* long init time possibly, so use this to block */
+	/* attempts to open our devices before we are ready (stops oops'es) */
+	int initializing;
+};
+
+/* extract register offset from codec struct */
+#define IO_REG_OFF(codec) (((struct i810_card *) codec->private_data)->ac97_id_map[codec->id])
+
+#define I810_IOREAD(size, type, card, off)				\
+({									\
+	type val;							\
+	if (card->use_mmio)						\
+		val=read##size(card->iobase_mmio+off);			\
+	else								\
+		val=in##size(card->iobase+off);				\
+	val;								\
+})
+
+#define I810_IOREADL(card, off)		I810_IOREAD(l, u32, card, off)
+#define I810_IOREADW(card, off)		I810_IOREAD(w, u16, card, off)
+#define I810_IOREADB(card, off)		I810_IOREAD(b, u8,  card, off)
+
+#define I810_IOWRITE(size, val, card, off)				\
+({									\
+	if (card->use_mmio)						\
+		write##size(val, card->iobase_mmio+off);		\
+	else								\
+		out##size(val, card->iobase+off);			\
+})
+
+#define I810_IOWRITEL(val, card, off)	I810_IOWRITE(l, val, card, off)
+#define I810_IOWRITEW(val, card, off)	I810_IOWRITE(w, val, card, off)
+#define I810_IOWRITEB(val, card, off)	I810_IOWRITE(b, val, card, off)
+
+#define GET_CIV(card, port) MODULOP2(I810_IOREADB((card), (port) + OFF_CIV), SG_LEN)
+#define GET_LVI(card, port) MODULOP2(I810_IOREADB((card), (port) + OFF_LVI), SG_LEN)
+
+/* set LVI from CIV */
+#define CIV_TO_LVI(card, port, off) \
+	I810_IOWRITEB(MODULOP2(GET_CIV((card), (port)) + (off), SG_LEN), (card), (port) + OFF_LVI)
+
+static struct ac97_quirk ac97_quirks[] __devinitdata = {
+	{
+		.vendor = 0x0e11,
+		.device = 0x00b8,
+		.name = "Compaq Evo D510C",
+		.type = AC97_TUNE_HP_ONLY
+	},
+	{
+		.vendor = 0x1028,
+		.device = 0x00d8,
+		.name = "Dell Precision 530",   /* AD1885 */
+		.type = AC97_TUNE_HP_ONLY
+	},
+	{
+		.vendor = 0x1028,
+		.device = 0x0126,
+		.name = "Dell Optiplex GX260",  /* AD1981A */
+		.type = AC97_TUNE_HP_ONLY
+	},
+	{
+		.vendor = 0x1028,
+		.device = 0x012d,
+		.name = "Dell Precision 450",   /* AD1981B*/
+		.type = AC97_TUNE_HP_ONLY
+	},
+	{       /* FIXME: which codec? */
+		.vendor = 0x103c,
+		.device = 0x00c3,
+		.name = "Hewlett-Packard onboard",
+		.type = AC97_TUNE_HP_ONLY
+	},
+	{
+		.vendor = 0x103c,
+		.device = 0x12f1,
+		.name = "HP xw8200",    /* AD1981B*/
+		.type = AC97_TUNE_HP_ONLY
+	},
+	{
+		.vendor = 0x103c,
+		.device = 0x3008,
+		.name = "HP xw4200",    /* AD1981B*/
+		.type = AC97_TUNE_HP_ONLY
+	},
+	{
+		.vendor = 0x10f1,
+		.device = 0x2665,
+		.name = "Fujitsu-Siemens Celsius",      /* AD1981? */
+		.type = AC97_TUNE_HP_ONLY
+	},
+	{
+		.vendor = 0x10f1,
+		.device = 0x2885,
+		.name = "AMD64 Mobo",   /* ALC650 */
+		.type = AC97_TUNE_HP_ONLY
+	},
+	{
+		.vendor = 0x110a,
+		.device = 0x0056,
+		.name = "Fujitsu-Siemens Scenic",       /* AD1981? */
+		.type = AC97_TUNE_HP_ONLY
+	},
+	{
+		.vendor = 0x11d4,
+		.device = 0x5375,
+		.name = "ADI AD1985 (discrete)",
+		.type = AC97_TUNE_HP_ONLY
+	},
+	{
+		.vendor = 0x1462,
+		.device = 0x5470,
+		.name = "MSI P4 ATX 645 Ultra",
+		.type = AC97_TUNE_HP_ONLY
+	},
+	{
+		.vendor = 0x1734,
+		.device = 0x0088,
+		.name = "Fujitsu-Siemens D1522",	/* AD1981 */
+		.type = AC97_TUNE_HP_ONLY
+	},
+	{
+		.vendor = 0x8086,
+		.device = 0x4856,
+		.name = "Intel D845WN (82801BA)",
+		.type = AC97_TUNE_SWAP_HP
+	},
+	{
+		.vendor = 0x8086,
+		.device = 0x4d44,
+		.name = "Intel D850EMV2",       /* AD1885 */
+		.type = AC97_TUNE_HP_ONLY
+	},
+	{
+		.vendor = 0x8086,
+		.device = 0x4d56,
+		.name = "Intel ICH/AD1885",
+		.type = AC97_TUNE_HP_ONLY
+	},
+	{
+		.vendor = 0x1028,
+		.device = 0x012d,
+		.name = "Dell Precision 450",   /* AD1981B*/
+		.type = AC97_TUNE_HP_ONLY
+	},
+	{
+		.vendor = 0x103c,
+		.device = 0x3008,
+		.name = "HP xw4200",    /* AD1981B*/
+		.type = AC97_TUNE_HP_ONLY
+	},
+	{
+		.vendor = 0x103c,
+		.device = 0x12f1,
+		.name = "HP xw8200",    /* AD1981B*/
+		.type = AC97_TUNE_HP_ONLY
+	},
+	{ } /* terminator */
+};
+
+static struct i810_card *devs = NULL;
+
+static int i810_open_mixdev(struct inode *inode, struct file *file);
+static int i810_ioctl_mixdev(struct inode *inode, struct file *file,
+			     unsigned int cmd, unsigned long arg);
+static u16 i810_ac97_get(struct ac97_codec *dev, u8 reg);
+static void i810_ac97_set(struct ac97_codec *dev, u8 reg, u16 data);
+static u16 i810_ac97_get_mmio(struct ac97_codec *dev, u8 reg);
+static void i810_ac97_set_mmio(struct ac97_codec *dev, u8 reg, u16 data);
+static u16 i810_ac97_get_io(struct ac97_codec *dev, u8 reg);
+static void i810_ac97_set_io(struct ac97_codec *dev, u8 reg, u16 data);
+
+static struct i810_channel *i810_alloc_pcm_channel(struct i810_card *card)
+{
+	if(card->channel[1].used==1)
+		return NULL;
+	card->channel[1].used=1;
+	return &card->channel[1];
+}
+
+static struct i810_channel *i810_alloc_rec_pcm_channel(struct i810_card *card)
+{
+	if(card->channel[0].used==1)
+		return NULL;
+	card->channel[0].used=1;
+	return &card->channel[0];
+}
+
+static struct i810_channel *i810_alloc_rec_mic_channel(struct i810_card *card)
+{
+	if(card->channel[2].used==1)
+		return NULL;
+	card->channel[2].used=1;
+	return &card->channel[2];
+}
+
+static void i810_free_pcm_channel(struct i810_card *card, int channel)
+{
+	card->channel[channel].used=0;
+}
+
+static int i810_valid_spdif_rate ( struct ac97_codec *codec, int rate )
+{
+	unsigned long id = 0L;
+
+	id = (i810_ac97_get(codec, AC97_VENDOR_ID1) << 16);
+	id |= i810_ac97_get(codec, AC97_VENDOR_ID2) & 0xffff;
+#ifdef DEBUG
+	printk ( "i810_audio: codec = %s, codec_id = 0x%08lx\n", codec->name, id);
+#endif
+	switch ( id ) {
+		case 0x41445361: /* AD1886 */
+			if (rate == 48000) {
+				return 1;
+			}
+			break;
+		default: /* all other codecs, until we know otherwiae */
+			if (rate == 48000 || rate == 44100 || rate == 32000) {
+				return 1;
+			}
+			break;
+	}
+	return (0);
+}
+
+/* i810_set_spdif_output
+ * 
+ *  Configure the S/PDIF output transmitter. When we turn on
+ *  S/PDIF, we turn off the analog output. This may not be
+ *  the right thing to do.
+ *
+ *  Assumptions:
+ *     The DSP sample rate must already be set to a supported
+ *     S/PDIF rate (32kHz, 44.1kHz, or 48kHz) or we abort.
+ */
+static int i810_set_spdif_output(struct i810_state *state, int slots, int rate)
+{
+	int	vol;
+	int	aud_reg;
+	int	r = 0;
+	struct ac97_codec *codec = state->card->ac97_codec[0];
+
+	if(!codec->codec_ops->digital) {
+		state->card->ac97_status &= ~SPDIF_ON;
+	} else {
+		if ( slots == -1 ) { /* Turn off S/PDIF */
+			codec->codec_ops->digital(codec, 0, 0, 0);
+			/* If the volume wasn't muted before we turned on S/PDIF, unmute it */
+			if ( !(state->card->ac97_status & VOL_MUTED) ) {
+				aud_reg = i810_ac97_get(codec, AC97_MASTER_VOL_STEREO);
+				i810_ac97_set(codec, AC97_MASTER_VOL_STEREO, (aud_reg & ~VOL_MUTED));
+			}
+			state->card->ac97_status &= ~(VOL_MUTED | SPDIF_ON);
+			return 0;
+		}
+
+		vol = i810_ac97_get(codec, AC97_MASTER_VOL_STEREO);
+		state->card->ac97_status = vol & VOL_MUTED;
+		
+		r = codec->codec_ops->digital(codec, slots, rate, 0);
+
+		if(r)
+			state->card->ac97_status |= SPDIF_ON;
+		else
+			state->card->ac97_status &= ~SPDIF_ON;
+
+		/* Mute the analog output */
+		/* Should this only mute the PCM volume??? */
+		i810_ac97_set(codec, AC97_MASTER_VOL_STEREO, (vol | VOL_MUTED));
+	}
+	return r;
+}
+
+/* i810_set_dac_channels
+ *
+ *  Configure the codec's multi-channel DACs
+ *
+ *  The logic is backwards. Setting the bit to 1 turns off the DAC. 
+ *
+ *  What about the ICH? We currently configure it using the
+ *  SNDCTL_DSP_CHANNELS ioctl.  If we're turnning on the DAC, 
+ *  does that imply that we want the ICH set to support
+ *  these channels?
+ *  
+ *  TODO:
+ *    vailidate that the codec really supports these DACs
+ *    before turning them on. 
+ */
+static void i810_set_dac_channels(struct i810_state *state, int channel)
+{
+	int	aud_reg;
+	struct ac97_codec *codec = state->card->ac97_codec[0];
+	
+	/* No codec, no setup */
+	
+	if(codec == NULL)
+		return;
+
+	aud_reg = i810_ac97_get(codec, AC97_EXTENDED_STATUS);
+	aud_reg |= AC97_EA_PRI | AC97_EA_PRJ | AC97_EA_PRK;
+	state->card->ac97_status &= ~(SURR_ON | CENTER_LFE_ON);
+
+	switch ( channel ) {
+		case 2: /* always enabled */
+			break;
+		case 4:
+			aud_reg &= ~AC97_EA_PRJ;
+			state->card->ac97_status |= SURR_ON;
+			break;
+		case 6:
+			aud_reg &= ~(AC97_EA_PRJ | AC97_EA_PRI | AC97_EA_PRK);
+			state->card->ac97_status |= SURR_ON | CENTER_LFE_ON;
+			break;
+		default:
+			break;
+	}
+	i810_ac97_set(codec, AC97_EXTENDED_STATUS, aud_reg);
+
+}
+
+
+/* set playback sample rate */
+static unsigned int i810_set_dac_rate(struct i810_state * state, unsigned int rate)
+{	
+	struct dmabuf *dmabuf = &state->dmabuf;
+	u32 new_rate;
+	struct ac97_codec *codec=state->card->ac97_codec[0];
+	
+	if(!(state->card->ac97_features&0x0001))
+	{
+		dmabuf->rate = clocking;
+#ifdef DEBUG
+		printk("Asked for %d Hz, but ac97_features says we only do %dHz.  Sorry!\n",
+		       rate,clocking);
+#endif		       
+		return clocking;
+	}
+			
+	if (rate > 48000)
+		rate = 48000;
+	if (rate < 8000)
+		rate = 8000;
+	dmabuf->rate = rate;
+		
+	/*
+	 *	Adjust for misclocked crap
+	 */
+	rate = ( rate * clocking)/48000;
+	if(strict_clocking && rate < 8000) {
+		rate = 8000;
+		dmabuf->rate = (rate * 48000)/clocking;
+	}
+
+        new_rate=ac97_set_dac_rate(codec, rate);
+	if(new_rate != rate) {
+		dmabuf->rate = (new_rate * 48000)/clocking;
+	}
+#ifdef DEBUG
+	printk("i810_audio: called i810_set_dac_rate : asked for %d, got %d\n", rate, dmabuf->rate);
+#endif
+	rate = new_rate;
+	return dmabuf->rate;
+}
+
+/* set recording sample rate */
+static unsigned int i810_set_adc_rate(struct i810_state * state, unsigned int rate)
+{
+	struct dmabuf *dmabuf = &state->dmabuf;
+	u32 new_rate;
+	struct ac97_codec *codec=state->card->ac97_codec[0];
+	
+	if(!(state->card->ac97_features&0x0001))
+	{
+		dmabuf->rate = clocking;
+		return clocking;
+	}
+			
+	if (rate > 48000)
+		rate = 48000;
+	if (rate < 8000)
+		rate = 8000;
+	dmabuf->rate = rate;
+
+	/*
+	 *	Adjust for misclocked crap
+	 */
+	 
+	rate = ( rate * clocking)/48000;
+	if(strict_clocking && rate < 8000) {
+		rate = 8000;
+		dmabuf->rate = (rate * 48000)/clocking;
+	}
+
+	new_rate = ac97_set_adc_rate(codec, rate);
+	
+	if(new_rate != rate) {
+		dmabuf->rate = (new_rate * 48000)/clocking;
+		rate = new_rate;
+	}
+#ifdef DEBUG
+	printk("i810_audio: called i810_set_adc_rate : rate = %d/%d\n", dmabuf->rate, rate);
+#endif
+	return dmabuf->rate;
+}
+
+/* get current playback/recording dma buffer pointer (byte offset from LBA),
+   called with spinlock held! */
+   
+static inline unsigned i810_get_dma_addr(struct i810_state *state, int rec)
+{
+	struct dmabuf *dmabuf = &state->dmabuf;
+	unsigned int civ, offset, port, port_picb, bytes = 2;
+	
+	if (!dmabuf->enable)
+		return 0;
+
+	if (rec)
+		port = dmabuf->read_channel->port;
+	else
+		port = dmabuf->write_channel->port;
+
+	if(state->card->pci_id == PCI_DEVICE_ID_SI_7012) {
+		port_picb = port + OFF_SR;
+		bytes = 1;
+	} else
+		port_picb = port + OFF_PICB;
+
+	do {
+		civ = GET_CIV(state->card, port);
+		offset = I810_IOREADW(state->card, port_picb);
+		/* Must have a delay here! */ 
+		if(offset == 0)
+			udelay(1);
+		/* Reread both registers and make sure that that total
+		 * offset from the first reading to the second is 0.
+		 * There is an issue with SiS hardware where it will count
+		 * picb down to 0, then update civ to the next value,
+		 * then set the new picb to fragsize bytes.  We can catch
+		 * it between the civ update and the picb update, making
+		 * it look as though we are 1 fragsize ahead of where we
+		 * are.  The next to we get the address though, it will
+		 * be back in the right place, and we will suddenly think
+		 * we just went forward dmasize - fragsize bytes, causing
+		 * totally stupid *huge* dma overrun messages.  We are
+		 * assuming that the 1us delay is more than long enough
+		 * that we won't have to worry about the chip still being
+		 * out of sync with reality ;-)
+		 */
+	} while (civ != GET_CIV(state->card, port) || offset != I810_IOREADW(state->card, port_picb));
+		 
+	return (((civ + 1) * dmabuf->fragsize - (bytes * offset))
+		% dmabuf->dmasize);
+}
+
+/* Stop recording (lock held) */
+static inline void __stop_adc(struct i810_state *state)
+{
+	struct dmabuf *dmabuf = &state->dmabuf;
+	struct i810_card *card = state->card;
+
+	dmabuf->enable &= ~ADC_RUNNING;
+	I810_IOWRITEB(0, card, PI_CR);
+	// wait for the card to acknowledge shutdown
+	while( I810_IOREADB(card, PI_CR) != 0 ) ;
+	// now clear any latent interrupt bits (like the halt bit)
+	if(card->pci_id == PCI_DEVICE_ID_SI_7012)
+		I810_IOWRITEB( I810_IOREADB(card, PI_PICB), card, PI_PICB );
+	else
+		I810_IOWRITEB( I810_IOREADB(card, PI_SR), card, PI_SR );
+	I810_IOWRITEL( I810_IOREADL(card, GLOB_STA) & INT_PI, card, GLOB_STA);
+}
+
+static void stop_adc(struct i810_state *state)
+{
+	struct i810_card *card = state->card;
+	unsigned long flags;
+
+	spin_lock_irqsave(&card->lock, flags);
+	__stop_adc(state);
+	spin_unlock_irqrestore(&card->lock, flags);
+}
+
+static inline void __start_adc(struct i810_state *state)
+{
+	struct dmabuf *dmabuf = &state->dmabuf;
+
+	if (dmabuf->count < dmabuf->dmasize && dmabuf->ready && !dmabuf->enable &&
+	    (dmabuf->trigger & PCM_ENABLE_INPUT)) {
+		dmabuf->enable |= ADC_RUNNING;
+		// Interrupt enable, LVI enable, DMA enable
+		I810_IOWRITEB(0x10 | 0x04 | 0x01, state->card, PI_CR);
+	}
+}
+
+static void start_adc(struct i810_state *state)
+{
+	struct i810_card *card = state->card;
+	unsigned long flags;
+
+	spin_lock_irqsave(&card->lock, flags);
+	__start_adc(state);
+	spin_unlock_irqrestore(&card->lock, flags);
+}
+
+/* stop playback (lock held) */
+static inline void __stop_dac(struct i810_state *state)
+{
+	struct dmabuf *dmabuf = &state->dmabuf;
+	struct i810_card *card = state->card;
+
+	dmabuf->enable &= ~DAC_RUNNING;
+	I810_IOWRITEB(0, card, PO_CR);
+	// wait for the card to acknowledge shutdown
+	while( I810_IOREADB(card, PO_CR) != 0 ) ;
+	// now clear any latent interrupt bits (like the halt bit)
+	if(card->pci_id == PCI_DEVICE_ID_SI_7012)
+		I810_IOWRITEB( I810_IOREADB(card, PO_PICB), card, PO_PICB );
+	else
+		I810_IOWRITEB( I810_IOREADB(card, PO_SR), card, PO_SR );
+	I810_IOWRITEL( I810_IOREADL(card, GLOB_STA) & INT_PO, card, GLOB_STA);
+}
+
+static void stop_dac(struct i810_state *state)
+{
+	struct i810_card *card = state->card;
+	unsigned long flags;
+
+	spin_lock_irqsave(&card->lock, flags);
+	__stop_dac(state);
+	spin_unlock_irqrestore(&card->lock, flags);
+}	
+
+static inline void __start_dac(struct i810_state *state)
+{
+	struct dmabuf *dmabuf = &state->dmabuf;
+
+	if (dmabuf->count > 0 && dmabuf->ready && !dmabuf->enable &&
+	    (dmabuf->trigger & PCM_ENABLE_OUTPUT)) {
+		dmabuf->enable |= DAC_RUNNING;
+		// Interrupt enable, LVI enable, DMA enable
+		I810_IOWRITEB(0x10 | 0x04 | 0x01, state->card, PO_CR);
+	}
+}
+static void start_dac(struct i810_state *state)
+{
+	struct i810_card *card = state->card;
+	unsigned long flags;
+
+	spin_lock_irqsave(&card->lock, flags);
+	__start_dac(state);
+	spin_unlock_irqrestore(&card->lock, flags);
+}
+
+#define DMABUF_DEFAULTORDER (16-PAGE_SHIFT)
+#define DMABUF_MINORDER 1
+
+/* allocate DMA buffer, playback and recording buffer should be allocated separately */
+static int alloc_dmabuf(struct i810_state *state)
+{
+	struct dmabuf *dmabuf = &state->dmabuf;
+	void *rawbuf= NULL;
+	int order, size;
+	struct page *page, *pend;
+
+	/* If we don't have any oss frag params, then use our default ones */
+	if(dmabuf->ossmaxfrags == 0)
+		dmabuf->ossmaxfrags = 4;
+	if(dmabuf->ossfragsize == 0)
+		dmabuf->ossfragsize = (PAGE_SIZE<<DMABUF_DEFAULTORDER)/dmabuf->ossmaxfrags;
+	size = dmabuf->ossfragsize * dmabuf->ossmaxfrags;
+
+	if(dmabuf->rawbuf && (PAGE_SIZE << dmabuf->buforder) == size)
+		return 0;
+	/* alloc enough to satisfy the oss params */
+	for (order = DMABUF_DEFAULTORDER; order >= DMABUF_MINORDER; order--) {
+		if ( (PAGE_SIZE<<order) > size )
+			continue;
+		if ((rawbuf = pci_alloc_consistent(state->card->pci_dev,
+						   PAGE_SIZE << order,
+						   &dmabuf->dma_handle)))
+			break;
+	}
+	if (!rawbuf)
+		return -ENOMEM;
+
+
+#ifdef DEBUG
+	printk("i810_audio: allocated %ld (order = %d) bytes at %p\n",
+	       PAGE_SIZE << order, order, rawbuf);
+#endif
+
+	dmabuf->ready  = dmabuf->mapped = 0;
+	dmabuf->rawbuf = rawbuf;
+	dmabuf->buforder = order;
+	
+	/* now mark the pages as reserved; otherwise remap_pfn_range doesn't do what we want */
+	pend = virt_to_page(rawbuf + (PAGE_SIZE << order) - 1);
+	for (page = virt_to_page(rawbuf); page <= pend; page++)
+		SetPageReserved(page);
+
+	return 0;
+}
+
+/* free DMA buffer */
+static void dealloc_dmabuf(struct i810_state *state)
+{
+	struct dmabuf *dmabuf = &state->dmabuf;
+	struct page *page, *pend;
+
+	if (dmabuf->rawbuf) {
+		/* undo marking the pages as reserved */
+		pend = virt_to_page(dmabuf->rawbuf + (PAGE_SIZE << dmabuf->buforder) - 1);
+		for (page = virt_to_page(dmabuf->rawbuf); page <= pend; page++)
+			ClearPageReserved(page);
+		pci_free_consistent(state->card->pci_dev, PAGE_SIZE << dmabuf->buforder,
+				    dmabuf->rawbuf, dmabuf->dma_handle);
+	}
+	dmabuf->rawbuf = NULL;
+	dmabuf->mapped = dmabuf->ready = 0;
+}
+
+static int prog_dmabuf(struct i810_state *state, unsigned rec)
+{
+	struct dmabuf *dmabuf = &state->dmabuf;
+	struct i810_channel *c;
+	struct sg_item *sg;
+	unsigned long flags;
+	int ret;
+	unsigned fragint;
+	int i;
+
+	spin_lock_irqsave(&state->card->lock, flags);
+	if(dmabuf->enable & DAC_RUNNING)
+		__stop_dac(state);
+	if(dmabuf->enable & ADC_RUNNING)
+		__stop_adc(state);
+	dmabuf->total_bytes = 0;
+	dmabuf->count = dmabuf->error = 0;
+	dmabuf->swptr = dmabuf->hwptr = 0;
+	spin_unlock_irqrestore(&state->card->lock, flags);
+
+	/* allocate DMA buffer, let alloc_dmabuf determine if we are already
+	 * allocated well enough or if we should replace the current buffer
+	 * (assuming one is already allocated, if it isn't, then allocate it).
+	 */
+	if ((ret = alloc_dmabuf(state)))
+		return ret;
+
+	/* FIXME: figure out all this OSS fragment stuff */
+	/* I did, it now does what it should according to the OSS API.  DL */
+	/* We may not have realloced our dmabuf, but the fragment size to
+	 * fragment number ratio may have changed, so go ahead and reprogram
+	 * things
+	 */
+	dmabuf->dmasize = PAGE_SIZE << dmabuf->buforder;
+	dmabuf->numfrag = SG_LEN;
+	dmabuf->fragsize = dmabuf->dmasize/dmabuf->numfrag;
+	dmabuf->fragsamples = dmabuf->fragsize >> 1;
+	dmabuf->fragshift = ffs(dmabuf->fragsize) - 1;
+	dmabuf->userfragsize = dmabuf->ossfragsize;
+	dmabuf->userfrags = dmabuf->dmasize/dmabuf->ossfragsize;
+
+	memset(dmabuf->rawbuf, 0, dmabuf->dmasize);
+
+	if(dmabuf->ossmaxfrags == 4) {
+		fragint = 8;
+	} else if (dmabuf->ossmaxfrags == 8) {
+		fragint = 4;
+	} else if (dmabuf->ossmaxfrags == 16) {
+		fragint = 2;
+	} else {
+		fragint = 1;
+	}
+	/*
+	 *	Now set up the ring 
+	 */
+	if(dmabuf->read_channel)
+		c = dmabuf->read_channel;
+	else
+		c = dmabuf->write_channel;
+	while(c != NULL) {
+		sg=&c->sg[0];
+		/*
+		 *	Load up 32 sg entries and take an interrupt at half
+		 *	way (we might want more interrupts later..) 
+		 */
+	  
+		for(i=0;i<dmabuf->numfrag;i++)
+		{
+			sg->busaddr=(u32)dmabuf->dma_handle+dmabuf->fragsize*i;
+			// the card will always be doing 16bit stereo
+			sg->control=dmabuf->fragsamples;
+			if(state->card->pci_id == PCI_DEVICE_ID_SI_7012)
+				sg->control <<= 1;
+			sg->control|=CON_BUFPAD;
+			// set us up to get IOC interrupts as often as needed to
+			// satisfy numfrag requirements, no more
+			if( ((i+1) % fragint) == 0) {
+				sg->control|=CON_IOC;
+			}
+			sg++;
+		}
+		spin_lock_irqsave(&state->card->lock, flags);
+		I810_IOWRITEB(2, state->card, c->port+OFF_CR);   /* reset DMA machine */
+		while( I810_IOREADB(state->card, c->port+OFF_CR) & 0x02 ) ;
+		I810_IOWRITEL((u32)state->card->chandma +
+		    c->num*sizeof(struct i810_channel),
+		    state->card, c->port+OFF_BDBAR);
+		CIV_TO_LVI(state->card, c->port, 0);
+
+		spin_unlock_irqrestore(&state->card->lock, flags);
+
+		if(c != dmabuf->write_channel)
+			c = dmabuf->write_channel;
+		else
+			c = NULL;
+	}
+	
+	/* set the ready flag for the dma buffer */
+	dmabuf->ready = 1;
+
+#ifdef DEBUG
+	printk("i810_audio: prog_dmabuf, sample rate = %d, format = %d,\n\tnumfrag = %d, "
+	       "fragsize = %d dmasize = %d\n",
+	       dmabuf->rate, dmabuf->fmt, dmabuf->numfrag,
+	       dmabuf->fragsize, dmabuf->dmasize);
+#endif
+
+	return 0;
+}
+
+static void __i810_update_lvi(struct i810_state *state, int rec)
+{
+	struct dmabuf *dmabuf = &state->dmabuf;
+	int x, port;
+	int trigger;
+	int count, fragsize;
+	void (*start)(struct i810_state *);
+
+	count = dmabuf->count;
+	if (rec) {
+		port = dmabuf->read_channel->port;
+		trigger = PCM_ENABLE_INPUT;
+		start = __start_adc;
+		count = dmabuf->dmasize - count;
+	} else {
+		port = dmabuf->write_channel->port;
+		trigger = PCM_ENABLE_OUTPUT;
+		start = __start_dac;
+	}
+
+	/* Do not process partial fragments. */
+	fragsize = dmabuf->fragsize;
+	if (count < fragsize)
+		return;
+
+	/* if we are currently stopped, then our CIV is actually set to our
+	 * *last* sg segment and we are ready to wrap to the next.  However,
+	 * if we set our LVI to the last sg segment, then it won't wrap to
+	 * the next sg segment, it won't even get a start.  So, instead, when
+	 * we are stopped, we set both the LVI value and also we increment
+	 * the CIV value to the next sg segment to be played so that when
+	 * we call start, things will operate properly.  Since the CIV can't
+	 * be written to directly for this purpose, we set the LVI to CIV + 1
+	 * temporarily.  Once the engine has started we set the LVI to its
+	 * final value.
+	 */
+	if (!dmabuf->enable && dmabuf->ready) {
+		if (!(dmabuf->trigger & trigger))
+			return;
+
+		CIV_TO_LVI(state->card, port, 1);
+
+		start(state);
+		while (!(I810_IOREADB(state->card, port + OFF_CR) & ((1<<4) | (1<<2))))
+			;
+	}
+
+	/* MASKP2(swptr, fragsize) - 1 is the tail of our transfer */
+	x = MODULOP2(MASKP2(dmabuf->swptr, fragsize) - 1, dmabuf->dmasize);
+	x >>= dmabuf->fragshift;
+	I810_IOWRITEB(x, state->card, port + OFF_LVI);
+}
+
+static void i810_update_lvi(struct i810_state *state, int rec)
+{
+	struct dmabuf *dmabuf = &state->dmabuf;
+	unsigned long flags;
+
+	if(!dmabuf->ready)
+		return;
+	spin_lock_irqsave(&state->card->lock, flags);
+	__i810_update_lvi(state, rec);
+	spin_unlock_irqrestore(&state->card->lock, flags);
+}
+
+/* update buffer manangement pointers, especially, dmabuf->count and dmabuf->hwptr */
+static void i810_update_ptr(struct i810_state *state)
+{
+	struct dmabuf *dmabuf = &state->dmabuf;
+	unsigned hwptr;
+	unsigned fragmask, dmamask;
+	int diff;
+
+	fragmask = MASKP2(~0, dmabuf->fragsize);
+	dmamask = MODULOP2(~0, dmabuf->dmasize);
+
+	/* error handling and process wake up for ADC */
+	if (dmabuf->enable == ADC_RUNNING) {
+		/* update hardware pointer */
+		hwptr = i810_get_dma_addr(state, 1) & fragmask;
+		diff = (hwptr - dmabuf->hwptr) & dmamask;
+#if defined(DEBUG_INTERRUPTS) || defined(DEBUG_MMAP)
+		printk("ADC HWP %d,%d,%d\n", hwptr, dmabuf->hwptr, diff);
+#endif
+		dmabuf->hwptr = hwptr;
+		dmabuf->total_bytes += diff;
+		dmabuf->count += diff;
+		if (dmabuf->count > dmabuf->dmasize) {
+			/* buffer underrun or buffer overrun */
+			/* this is normal for the end of a read */
+			/* only give an error if we went past the */
+			/* last valid sg entry */
+			if (GET_CIV(state->card, PI_BASE) !=
+			    GET_LVI(state->card, PI_BASE)) {
+				printk(KERN_WARNING "i810_audio: DMA overrun on read\n");
+				dmabuf->error++;
+			}
+		}
+		if (diff)
+			wake_up(&dmabuf->wait);
+	}
+	/* error handling and process wake up for DAC */
+	if (dmabuf->enable == DAC_RUNNING) {
+		/* update hardware pointer */
+		hwptr = i810_get_dma_addr(state, 0) & fragmask;
+		diff = (hwptr - dmabuf->hwptr) & dmamask;
+#if defined(DEBUG_INTERRUPTS) || defined(DEBUG_MMAP)
+		printk("DAC HWP %d,%d,%d\n", hwptr, dmabuf->hwptr, diff);
+#endif
+		dmabuf->hwptr = hwptr;
+		dmabuf->total_bytes += diff;
+		dmabuf->count -= diff;
+		if (dmabuf->count < 0) {
+			/* buffer underrun or buffer overrun */
+			/* this is normal for the end of a write */
+			/* only give an error if we went past the */
+			/* last valid sg entry */
+			if (GET_CIV(state->card, PO_BASE) !=
+			    GET_LVI(state->card, PO_BASE)) {
+				printk(KERN_WARNING "i810_audio: DMA overrun on write\n");
+				printk("i810_audio: CIV %d, LVI %d, hwptr %x, "
+					"count %d\n",
+					GET_CIV(state->card, PO_BASE),
+					GET_LVI(state->card, PO_BASE),
+					dmabuf->hwptr, dmabuf->count);
+				dmabuf->error++;
+			}
+		}
+		if (diff)
+			wake_up(&dmabuf->wait);
+	}
+}
+
+static inline int i810_get_free_write_space(struct i810_state *state)
+{
+	struct dmabuf *dmabuf = &state->dmabuf;
+	int free;
+
+	i810_update_ptr(state);
+	// catch underruns during playback
+	if (dmabuf->count < 0) {
+		dmabuf->count = 0;
+		dmabuf->swptr = dmabuf->hwptr;
+	}
+	free = dmabuf->dmasize - dmabuf->count;
+	if(free < 0)
+		return(0);
+	return(free);
+}
+
+static inline int i810_get_available_read_data(struct i810_state *state)
+{
+	struct dmabuf *dmabuf = &state->dmabuf;
+	int avail;
+
+	i810_update_ptr(state);
+	// catch overruns during record
+	if (dmabuf->count > dmabuf->dmasize) {
+		dmabuf->count = dmabuf->dmasize;
+		dmabuf->swptr = dmabuf->hwptr;
+	}
+	avail = dmabuf->count;
+	if(avail < 0)
+		return(0);
+	return(avail);
+}
+
+static inline void fill_partial_frag(struct dmabuf *dmabuf)
+{
+	unsigned fragsize;
+	unsigned swptr, len;
+
+	fragsize = dmabuf->fragsize;
+	swptr = dmabuf->swptr;
+	len = fragsize - MODULOP2(dmabuf->swptr, fragsize);
+	if (len == fragsize)
+		return;
+
+	memset(dmabuf->rawbuf + swptr, '\0', len);
+	dmabuf->swptr = MODULOP2(swptr + len, dmabuf->dmasize);
+	dmabuf->count += len;
+}
+
+static int drain_dac(struct i810_state *state, int signals_allowed)
+{
+	DECLARE_WAITQUEUE(wait, current);
+	struct dmabuf *dmabuf = &state->dmabuf;
+	unsigned long flags;
+	unsigned long tmo;
+	int count;
+
+	if (!dmabuf->ready)
+		return 0;
+	if(dmabuf->mapped) {
+		stop_dac(state);
+		return 0;
+	}
+
+	spin_lock_irqsave(&state->card->lock, flags);
+
+	fill_partial_frag(dmabuf);
+
+	/* 
+	 * This will make sure that our LVI is correct, that our
+	 * pointer is updated, and that the DAC is running.  We
+	 * have to force the setting of dmabuf->trigger to avoid
+	 * any possible deadlocks.
+	 */
+	dmabuf->trigger = PCM_ENABLE_OUTPUT;
+	__i810_update_lvi(state, 0);
+
+	spin_unlock_irqrestore(&state->card->lock, flags);
+
+	add_wait_queue(&dmabuf->wait, &wait);
+	for (;;) {
+
+		spin_lock_irqsave(&state->card->lock, flags);
+		i810_update_ptr(state);
+		count = dmabuf->count;
+
+		/* It seems that we have to set the current state to
+		 * TASK_INTERRUPTIBLE every time to make the process
+		 * really go to sleep.  This also has to be *after* the
+		 * update_ptr() call because update_ptr is likely to
+		 * do a wake_up() which will unset this before we ever
+		 * try to sleep, resuling in a tight loop in this code
+		 * instead of actually sleeping and waiting for an
+		 * interrupt to wake us up!
+		 */
+		__set_current_state(signals_allowed ?
+				    TASK_INTERRUPTIBLE : TASK_UNINTERRUPTIBLE);
+		spin_unlock_irqrestore(&state->card->lock, flags);
+
+		if (count <= 0)
+			break;
+
+                if (signal_pending(current) && signals_allowed) {
+                        break;
+                }
+
+		/*
+		 * set the timeout to significantly longer than it *should*
+		 * take for the DAC to drain the DMA buffer
+		 */
+		tmo = (count * HZ) / (dmabuf->rate);
+		if (!schedule_timeout(tmo >= 2 ? tmo : 2)){
+			printk(KERN_ERR "i810_audio: drain_dac, dma timeout?\n");
+			count = 0;
+			break;
+		}
+	}
+	set_current_state(TASK_RUNNING);
+	remove_wait_queue(&dmabuf->wait, &wait);
+	if(count > 0 && signal_pending(current) && signals_allowed)
+		return -ERESTARTSYS;
+	stop_dac(state);
+	return 0;
+}
+
+static void i810_channel_interrupt(struct i810_card *card)
+{
+	int i, count;
+	
+#ifdef DEBUG_INTERRUPTS
+	printk("CHANNEL ");
+#endif
+	for(i=0;i<NR_HW_CH;i++)
+	{
+		struct i810_state *state = card->states[i];
+		struct i810_channel *c;
+		struct dmabuf *dmabuf;
+		unsigned long port;
+		u16 status;
+		
+		if(!state)
+			continue;
+		if(!state->dmabuf.ready)
+			continue;
+		dmabuf = &state->dmabuf;
+		if(dmabuf->enable & DAC_RUNNING) {
+			c=dmabuf->write_channel;
+		} else if(dmabuf->enable & ADC_RUNNING) {
+			c=dmabuf->read_channel;
+		} else	/* This can occur going from R/W to close */
+			continue;
+		
+		port = c->port;
+
+		if(card->pci_id == PCI_DEVICE_ID_SI_7012)
+			status = I810_IOREADW(card, port + OFF_PICB);
+		else
+			status = I810_IOREADW(card, port + OFF_SR);
+
+#ifdef DEBUG_INTERRUPTS
+		printk("NUM %d PORT %X IRQ ( ST%d ", c->num, c->port, status);
+#endif
+		if(status & DMA_INT_COMPLETE)
+		{
+			/* only wake_up() waiters if this interrupt signals
+			 * us being beyond a userfragsize of data open or
+			 * available, and i810_update_ptr() does that for
+			 * us
+			 */
+			i810_update_ptr(state);
+#ifdef DEBUG_INTERRUPTS
+			printk("COMP %d ", dmabuf->hwptr /
+					dmabuf->fragsize);
+#endif
+		}
+		if(status & (DMA_INT_LVI | DMA_INT_DCH))
+		{
+			/* wake_up() unconditionally on LVI and DCH */
+			i810_update_ptr(state);
+			wake_up(&dmabuf->wait);
+#ifdef DEBUG_INTERRUPTS
+			if(status & DMA_INT_LVI)
+				printk("LVI ");
+			if(status & DMA_INT_DCH)
+				printk("DCH -");
+#endif
+			count = dmabuf->count;
+			if(dmabuf->enable & ADC_RUNNING)
+				count = dmabuf->dmasize - count;
+			if (count >= (int)dmabuf->fragsize) {
+				I810_IOWRITEB(I810_IOREADB(card, port+OFF_CR) | 1, card, port+OFF_CR);
+#ifdef DEBUG_INTERRUPTS
+				printk(" CONTINUE ");
+#endif
+			} else {
+				if (dmabuf->enable & DAC_RUNNING)
+					__stop_dac(state);
+				if (dmabuf->enable & ADC_RUNNING)
+					__stop_adc(state);
+				dmabuf->enable = 0;
+#ifdef DEBUG_INTERRUPTS
+				printk(" STOP ");
+#endif
+			}
+		}
+		if(card->pci_id == PCI_DEVICE_ID_SI_7012)
+			I810_IOWRITEW(status & DMA_INT_MASK, card, port + OFF_PICB);
+		else
+			I810_IOWRITEW(status & DMA_INT_MASK, card, port + OFF_SR);
+	}
+#ifdef DEBUG_INTERRUPTS
+	printk(")\n");
+#endif
+}
+
+static irqreturn_t i810_interrupt(int irq, void *dev_id, struct pt_regs *regs)
+{
+	struct i810_card *card = (struct i810_card *)dev_id;
+	u32 status;
+
+	spin_lock(&card->lock);
+
+	status = I810_IOREADL(card, GLOB_STA);
+
+	if(!(status & INT_MASK)) 
+	{
+		spin_unlock(&card->lock);
+		return IRQ_NONE;  /* not for us */
+	}
+
+	if(status & (INT_PO|INT_PI|INT_MC))
+		i810_channel_interrupt(card);
+
+ 	/* clear 'em */
+	I810_IOWRITEL(status & INT_MASK, card, GLOB_STA);
+	spin_unlock(&card->lock);
+	return IRQ_HANDLED;
+}
+
+/* in this loop, dmabuf.count signifies the amount of data that is
+   waiting to be copied to the user's buffer.  It is filled by the dma
+   machine and drained by this loop. */
+
+static ssize_t i810_read(struct file *file, char __user *buffer, size_t count, loff_t *ppos)
+{
+	struct i810_state *state = (struct i810_state *)file->private_data;
+	struct i810_card *card=state ? state->card : NULL;
+	struct dmabuf *dmabuf = &state->dmabuf;
+	ssize_t ret;
+	unsigned long flags;
+	unsigned int swptr;
+	int cnt;
+	int pending;
+        DECLARE_WAITQUEUE(waita, current);
+
+#ifdef DEBUG2
+	printk("i810_audio: i810_read called, count = %d\n", count);
+#endif
+
+	if (dmabuf->mapped)
+		return -ENXIO;
+	if (dmabuf->enable & DAC_RUNNING)
+		return -ENODEV;
+	if (!dmabuf->read_channel) {
+		dmabuf->ready = 0;
+		dmabuf->read_channel = card->alloc_rec_pcm_channel(card);
+		if (!dmabuf->read_channel) {
+			return -EBUSY;
+		}
+	}
+	if (!dmabuf->ready && (ret = prog_dmabuf(state, 1)))
+		return ret;
+	if (!access_ok(VERIFY_WRITE, buffer, count))
+		return -EFAULT;
+	ret = 0;
+
+	pending = 0;
+
+        add_wait_queue(&dmabuf->wait, &waita);
+	while (count > 0) {
+		set_current_state(TASK_INTERRUPTIBLE);
+		spin_lock_irqsave(&card->lock, flags);
+                if (PM_SUSPENDED(card)) {
+                        spin_unlock_irqrestore(&card->lock, flags);
+                        schedule();
+                        if (signal_pending(current)) {
+                                if (!ret) ret = -EAGAIN;
+                                break;
+                        }
+                        continue;
+                }
+		cnt = i810_get_available_read_data(state);
+		swptr = dmabuf->swptr;
+		// this is to make the copy_to_user simpler below
+		if(cnt > (dmabuf->dmasize - swptr))
+			cnt = dmabuf->dmasize - swptr;
+		spin_unlock_irqrestore(&card->lock, flags);
+
+		if (cnt > count)
+			cnt = count;
+		if (cnt <= 0) {
+			unsigned long tmo;
+			/*
+			 * Don't let us deadlock.  The ADC won't start if
+			 * dmabuf->trigger isn't set.  A call to SETTRIGGER
+			 * could have turned it off after we set it to on
+			 * previously.
+			 */
+			dmabuf->trigger = PCM_ENABLE_INPUT;
+			/*
+			 * This does three things.  Updates LVI to be correct,
+			 * makes sure the ADC is running, and updates the
+			 * hwptr.
+			 */
+			i810_update_lvi(state,1);
+			if (file->f_flags & O_NONBLOCK) {
+				if (!ret) ret = -EAGAIN;
+				goto done;
+			}
+			/* Set the timeout to how long it would take to fill
+			 * two of our buffers.  If we haven't been woke up
+			 * by then, then we know something is wrong.
+			 */
+			tmo = (dmabuf->dmasize * HZ * 2) / (dmabuf->rate * 4);
+			/* There are two situations when sleep_on_timeout returns, one is when
+			   the interrupt is serviced correctly and the process is waked up by
+			   ISR ON TIME. Another is when timeout is expired, which means that
+			   either interrupt is NOT serviced correctly (pending interrupt) or it
+			   is TOO LATE for the process to be scheduled to run (scheduler latency)
+			   which results in a (potential) buffer overrun. And worse, there is
+			   NOTHING we can do to prevent it. */
+			if (!schedule_timeout(tmo >= 2 ? tmo : 2)) {
+#ifdef DEBUG
+				printk(KERN_ERR "i810_audio: recording schedule timeout, "
+				       "dmasz %u fragsz %u count %i hwptr %u swptr %u\n",
+				       dmabuf->dmasize, dmabuf->fragsize, dmabuf->count,
+				       dmabuf->hwptr, dmabuf->swptr);
+#endif
+				/* a buffer overrun, we delay the recovery until next time the
+				   while loop begin and we REALLY have space to record */
+			}
+			if (signal_pending(current)) {
+				ret = ret ? ret : -ERESTARTSYS;
+				goto done;
+			}
+			continue;
+		}
+
+		if (copy_to_user(buffer, dmabuf->rawbuf + swptr, cnt)) {
+			if (!ret) ret = -EFAULT;
+			goto done;
+		}
+
+		swptr = MODULOP2(swptr + cnt, dmabuf->dmasize);
+
+		spin_lock_irqsave(&card->lock, flags);
+
+                if (PM_SUSPENDED(card)) {
+                        spin_unlock_irqrestore(&card->lock, flags);
+                        continue;
+                }
+		dmabuf->swptr = swptr;
+		pending = dmabuf->count -= cnt;
+		spin_unlock_irqrestore(&card->lock, flags);
+
+		count -= cnt;
+		buffer += cnt;
+		ret += cnt;
+	}
+ done:
+	pending = dmabuf->dmasize - pending;
+	if (dmabuf->enable || pending >= dmabuf->userfragsize)
+		i810_update_lvi(state, 1);
+        set_current_state(TASK_RUNNING);
+        remove_wait_queue(&dmabuf->wait, &waita);
+
+	return ret;
+}
+
+/* in this loop, dmabuf.count signifies the amount of data that is waiting to be dma to
+   the soundcard.  it is drained by the dma machine and filled by this loop. */
+static ssize_t i810_write(struct file *file, const char __user *buffer, size_t count, loff_t *ppos)
+{
+	struct i810_state *state = (struct i810_state *)file->private_data;
+	struct i810_card *card=state ? state->card : NULL;
+	struct dmabuf *dmabuf = &state->dmabuf;
+	ssize_t ret;
+	unsigned long flags;
+	unsigned int swptr = 0;
+	int pending;
+	int cnt;
+        DECLARE_WAITQUEUE(waita, current);
+
+#ifdef DEBUG2
+	printk("i810_audio: i810_write called, count = %d\n", count);
+#endif
+
+	if (dmabuf->mapped)
+		return -ENXIO;
+	if (dmabuf->enable & ADC_RUNNING)
+		return -ENODEV;
+	if (!dmabuf->write_channel) {
+		dmabuf->ready = 0;
+		dmabuf->write_channel = card->alloc_pcm_channel(card);
+		if(!dmabuf->write_channel)
+			return -EBUSY;
+	}
+	if (!dmabuf->ready && (ret = prog_dmabuf(state, 0)))
+		return ret;
+	if (!access_ok(VERIFY_READ, buffer, count))
+		return -EFAULT;
+	ret = 0;
+
+	pending = 0;
+
+        add_wait_queue(&dmabuf->wait, &waita);
+	while (count > 0) {
+		set_current_state(TASK_INTERRUPTIBLE);
+		spin_lock_irqsave(&state->card->lock, flags);
+                if (PM_SUSPENDED(card)) {
+                        spin_unlock_irqrestore(&card->lock, flags);
+                        schedule();
+                        if (signal_pending(current)) {
+                                if (!ret) ret = -EAGAIN;
+                                break;
+                        }
+                        continue;
+                }
+
+		cnt = i810_get_free_write_space(state);
+		swptr = dmabuf->swptr;
+		/* Bound the maximum size to how much we can copy to the
+		 * dma buffer before we hit the end.  If we have more to
+		 * copy then it will get done in a second pass of this
+		 * loop starting from the beginning of the buffer.
+		 */
+		if(cnt > (dmabuf->dmasize - swptr))
+			cnt = dmabuf->dmasize - swptr;
+		spin_unlock_irqrestore(&state->card->lock, flags);
+
+#ifdef DEBUG2
+		printk(KERN_INFO "i810_audio: i810_write: %d bytes available space\n", cnt);
+#endif
+		if (cnt > count)
+			cnt = count;
+		if (cnt <= 0) {
+			unsigned long tmo;
+			// There is data waiting to be played
+			/*
+			 * Force the trigger setting since we would
+			 * deadlock with it set any other way
+			 */
+			dmabuf->trigger = PCM_ENABLE_OUTPUT;
+			i810_update_lvi(state,0);
+			if (file->f_flags & O_NONBLOCK) {
+				if (!ret) ret = -EAGAIN;
+				goto ret;
+			}
+			/* Not strictly correct but works */
+			tmo = (dmabuf->dmasize * HZ * 2) / (dmabuf->rate * 4);
+			/* There are two situations when sleep_on_timeout returns, one is when
+			   the interrupt is serviced correctly and the process is waked up by
+			   ISR ON TIME. Another is when timeout is expired, which means that
+			   either interrupt is NOT serviced correctly (pending interrupt) or it
+			   is TOO LATE for the process to be scheduled to run (scheduler latency)
+			   which results in a (potential) buffer underrun. And worse, there is
+			   NOTHING we can do to prevent it. */
+			if (!schedule_timeout(tmo >= 2 ? tmo : 2)) {
+#ifdef DEBUG
+				printk(KERN_ERR "i810_audio: playback schedule timeout, "
+				       "dmasz %u fragsz %u count %i hwptr %u swptr %u\n",
+				       dmabuf->dmasize, dmabuf->fragsize, dmabuf->count,
+				       dmabuf->hwptr, dmabuf->swptr);
+#endif
+				/* a buffer underrun, we delay the recovery until next time the
+				   while loop begin and we REALLY have data to play */
+				//return ret;
+			}
+			if (signal_pending(current)) {
+				if (!ret) ret = -ERESTARTSYS;
+				goto ret;
+			}
+			continue;
+		}
+		if (copy_from_user(dmabuf->rawbuf+swptr,buffer,cnt)) {
+			if (!ret) ret = -EFAULT;
+			goto ret;
+		}
+
+		swptr = MODULOP2(swptr + cnt, dmabuf->dmasize);
+
+		spin_lock_irqsave(&state->card->lock, flags);
+                if (PM_SUSPENDED(card)) {
+                        spin_unlock_irqrestore(&card->lock, flags);
+                        continue;
+                }
+
+		dmabuf->swptr = swptr;
+		pending = dmabuf->count += cnt;
+
+		count -= cnt;
+		buffer += cnt;
+		ret += cnt;
+		spin_unlock_irqrestore(&state->card->lock, flags);
+	}
+ret:
+	if (dmabuf->enable || pending >= dmabuf->userfragsize)
+		i810_update_lvi(state, 0);
+        set_current_state(TASK_RUNNING);
+        remove_wait_queue(&dmabuf->wait, &waita);
+
+	return ret;
+}
+
+/* No kernel lock - we have our own spinlock */
+static unsigned int i810_poll(struct file *file, struct poll_table_struct *wait)
+{
+	struct i810_state *state = (struct i810_state *)file->private_data;
+	struct dmabuf *dmabuf = &state->dmabuf;
+	unsigned long flags;
+	unsigned int mask = 0;
+
+	if(!dmabuf->ready)
+		return 0;
+	poll_wait(file, &dmabuf->wait, wait);
+	spin_lock_irqsave(&state->card->lock, flags);
+	if (dmabuf->enable & ADC_RUNNING ||
+	    dmabuf->trigger & PCM_ENABLE_INPUT) {
+		if (i810_get_available_read_data(state) >= 
+		    (signed)dmabuf->userfragsize)
+			mask |= POLLIN | POLLRDNORM;
+	}
+	if (dmabuf->enable & DAC_RUNNING ||
+	    dmabuf->trigger & PCM_ENABLE_OUTPUT) {
+		if (i810_get_free_write_space(state) >=
+		    (signed)dmabuf->userfragsize)
+			mask |= POLLOUT | POLLWRNORM;
+	}
+	spin_unlock_irqrestore(&state->card->lock, flags);
+	return mask;
+}
+
+static int i810_mmap(struct file *file, struct vm_area_struct *vma)
+{
+	struct i810_state *state = (struct i810_state *)file->private_data;
+	struct dmabuf *dmabuf = &state->dmabuf;
+	int ret = -EINVAL;
+	unsigned long size;
+
+	lock_kernel();
+	if (vma->vm_flags & VM_WRITE) {
+		if (!dmabuf->write_channel &&
+		    (dmabuf->write_channel =
+		     state->card->alloc_pcm_channel(state->card)) == NULL) {
+			ret = -EBUSY;
+			goto out;
+		}
+	}
+	if (vma->vm_flags & VM_READ) {
+		if (!dmabuf->read_channel &&
+		    (dmabuf->read_channel = 
+		     state->card->alloc_rec_pcm_channel(state->card)) == NULL) {
+			ret = -EBUSY;
+			goto out;
+		}
+	}
+	if ((ret = prog_dmabuf(state, 0)) != 0)
+		goto out;
+
+	ret = -EINVAL;
+	if (vma->vm_pgoff != 0)
+		goto out;
+	size = vma->vm_end - vma->vm_start;
+	if (size > (PAGE_SIZE << dmabuf->buforder))
+		goto out;
+	ret = -EAGAIN;
+	if (remap_pfn_range(vma, vma->vm_start,
+			     virt_to_phys(dmabuf->rawbuf) >> PAGE_SHIFT,
+			     size, vma->vm_page_prot))
+		goto out;
+	dmabuf->mapped = 1;
+	dmabuf->trigger = 0;
+	ret = 0;
+#ifdef DEBUG_MMAP
+	printk("i810_audio: mmap'ed %ld bytes of data space\n", size);
+#endif
+out:
+	unlock_kernel();
+	return ret;
+}
+
+static int i810_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
+{
+	struct i810_state *state = (struct i810_state *)file->private_data;
+	struct i810_channel *c = NULL;
+	struct dmabuf *dmabuf = &state->dmabuf;
+	unsigned long flags;
+	audio_buf_info abinfo;
+	count_info cinfo;
+	unsigned int i_glob_cnt;
+	int val = 0, ret;
+	struct ac97_codec *codec = state->card->ac97_codec[0];
+	void __user *argp = (void __user *)arg;
+	int __user *p = argp;
+
+#ifdef DEBUG
+	printk("i810_audio: i810_ioctl, arg=0x%x, cmd=", arg ? *p : 0);
+#endif
+
+	switch (cmd) 
+	{
+	case OSS_GETVERSION:
+#ifdef DEBUG
+		printk("OSS_GETVERSION\n");
+#endif
+		return put_user(SOUND_VERSION, p);
+
+	case SNDCTL_DSP_RESET:
+#ifdef DEBUG
+		printk("SNDCTL_DSP_RESET\n");
+#endif
+		spin_lock_irqsave(&state->card->lock, flags);
+		if (dmabuf->enable == DAC_RUNNING) {
+			c = dmabuf->write_channel;
+			__stop_dac(state);
+		}
+		if (dmabuf->enable == ADC_RUNNING) {
+			c = dmabuf->read_channel;
+			__stop_adc(state);
+		}
+		if (c != NULL) {
+			I810_IOWRITEB(2, state->card, c->port+OFF_CR);   /* reset DMA machine */
+			while ( I810_IOREADB(state->card, c->port+OFF_CR) & 2 )
+				cpu_relax();
+			I810_IOWRITEL((u32)state->card->chandma +
+			    c->num*sizeof(struct i810_channel),
+			    state->card, c->port+OFF_BDBAR);
+			CIV_TO_LVI(state->card, c->port, 0);
+		}
+
+		spin_unlock_irqrestore(&state->card->lock, flags);
+		synchronize_irq(state->card->pci_dev->irq);
+		dmabuf->ready = 0;
+		dmabuf->swptr = dmabuf->hwptr = 0;
+		dmabuf->count = dmabuf->total_bytes = 0;
+		return 0;
+
+	case SNDCTL_DSP_SYNC:
+#ifdef DEBUG
+		printk("SNDCTL_DSP_SYNC\n");
+#endif
+		if (dmabuf->enable != DAC_RUNNING || file->f_flags & O_NONBLOCK)
+			return 0;
+		if((val = drain_dac(state, 1)))
+			return val;
+		dmabuf->total_bytes = 0;
+		return 0;
+
+	case SNDCTL_DSP_SPEED: /* set smaple rate */
+#ifdef DEBUG
+		printk("SNDCTL_DSP_SPEED\n");
+#endif
+		if (get_user(val, p))
+			return -EFAULT;
+		if (val >= 0) {
+			if (file->f_mode & FMODE_WRITE) {
+				if ( (state->card->ac97_status & SPDIF_ON) ) {  /* S/PDIF Enabled */
+					/* AD1886 only supports 48000, need to check that */
+					if ( i810_valid_spdif_rate ( codec, val ) ) {
+						/* Set DAC rate */
+                                        	i810_set_spdif_output ( state, -1, 0 );
+						stop_dac(state);
+						dmabuf->ready = 0;
+						spin_lock_irqsave(&state->card->lock, flags);
+						i810_set_dac_rate(state, val);
+						spin_unlock_irqrestore(&state->card->lock, flags);
+						/* Set S/PDIF transmitter rate. */
+						i810_set_spdif_output ( state, AC97_EA_SPSA_3_4, val );
+	                                        if ( ! (state->card->ac97_status & SPDIF_ON) ) {
+							val = dmabuf->rate;
+						}
+					} else { /* Not a valid rate for S/PDIF, ignore it */
+						val = dmabuf->rate;
+					}
+				} else {
+					stop_dac(state);
+					dmabuf->ready = 0;
+					spin_lock_irqsave(&state->card->lock, flags);
+					i810_set_dac_rate(state, val);
+					spin_unlock_irqrestore(&state->card->lock, flags);
+				}
+			}
+			if (file->f_mode & FMODE_READ) {
+				stop_adc(state);
+				dmabuf->ready = 0;
+				spin_lock_irqsave(&state->card->lock, flags);
+				i810_set_adc_rate(state, val);
+				spin_unlock_irqrestore(&state->card->lock, flags);
+			}
+		}
+		return put_user(dmabuf->rate, p);
+
+	case SNDCTL_DSP_STEREO: /* set stereo or mono channel */
+#ifdef DEBUG
+		printk("SNDCTL_DSP_STEREO\n");
+#endif
+		if (dmabuf->enable & DAC_RUNNING) {
+			stop_dac(state);
+		}
+		if (dmabuf->enable & ADC_RUNNING) {
+			stop_adc(state);
+		}
+		return put_user(1, p);
+
+	case SNDCTL_DSP_GETBLKSIZE:
+		if (file->f_mode & FMODE_WRITE) {
+			if (!dmabuf->ready && (val = prog_dmabuf(state, 0)))
+				return val;
+		}
+		if (file->f_mode & FMODE_READ) {
+			if (!dmabuf->ready && (val = prog_dmabuf(state, 1)))
+				return val;
+		}
+#ifdef DEBUG
+		printk("SNDCTL_DSP_GETBLKSIZE %d\n", dmabuf->userfragsize);
+#endif
+		return put_user(dmabuf->userfragsize, p);
+
+	case SNDCTL_DSP_GETFMTS: /* Returns a mask of supported sample format*/
+#ifdef DEBUG
+		printk("SNDCTL_DSP_GETFMTS\n");
+#endif
+		return put_user(AFMT_S16_LE, p);
+
+	case SNDCTL_DSP_SETFMT: /* Select sample format */
+#ifdef DEBUG
+		printk("SNDCTL_DSP_SETFMT\n");
+#endif
+		return put_user(AFMT_S16_LE, p);
+
+	case SNDCTL_DSP_CHANNELS:
+#ifdef DEBUG
+		printk("SNDCTL_DSP_CHANNELS\n");
+#endif
+		if (get_user(val, p))
+			return -EFAULT;
+
+		if (val > 0) {
+			if (dmabuf->enable & DAC_RUNNING) {
+				stop_dac(state);
+			}
+			if (dmabuf->enable & ADC_RUNNING) {
+				stop_adc(state);
+			}
+		} else {
+			return put_user(state->card->channels, p);
+		}
+
+		/* ICH and ICH0 only support 2 channels */
+		if ( state->card->pci_id == PCI_DEVICE_ID_INTEL_82801AA_5
+		     || state->card->pci_id == PCI_DEVICE_ID_INTEL_82801AB_5) 
+			return put_user(2, p);
+	
+		/* Multi-channel support was added with ICH2. Bits in */
+		/* Global Status and Global Control register are now  */
+		/* used to indicate this.                             */
+
+                i_glob_cnt = I810_IOREADL(state->card, GLOB_CNT);
+
+		/* Current # of channels enabled */
+		if ( i_glob_cnt & 0x0100000 )
+			ret = 4;
+		else if ( i_glob_cnt & 0x0200000 )
+			ret = 6;
+		else
+			ret = 2;
+
+		switch ( val ) {
+			case 2: /* 2 channels is always supported */
+				I810_IOWRITEL(i_glob_cnt & 0xffcfffff,
+				     state->card, GLOB_CNT);
+				/* Do we need to change mixer settings????  */
+				break;
+			case 4: /* Supported on some chipsets, better check first */
+				if ( state->card->channels >= 4 ) {
+					I810_IOWRITEL((i_glob_cnt & 0xffcfffff) | 0x100000,
+					      state->card, GLOB_CNT);
+					/* Do we need to change mixer settings??? */
+				} else {
+					val = ret;
+				}
+				break;
+			case 6: /* Supported on some chipsets, better check first */
+				if ( state->card->channels >= 6 ) {
+					I810_IOWRITEL((i_glob_cnt & 0xffcfffff) | 0x200000,
+					      state->card, GLOB_CNT);
+					/* Do we need to change mixer settings??? */
+				} else {
+					val = ret;
+				}
+				break;
+			default: /* nothing else is ever supported by the chipset */
+				val = ret;
+				break;
+		}
+
+		return put_user(val, p);
+
+	case SNDCTL_DSP_POST: /* the user has sent all data and is notifying us */
+		/* we update the swptr to the end of the last sg segment then return */
+#ifdef DEBUG
+		printk("SNDCTL_DSP_POST\n");
+#endif
+		if(!dmabuf->ready || (dmabuf->enable != DAC_RUNNING))
+			return 0;
+		if((dmabuf->swptr % dmabuf->fragsize) != 0) {
+			val = dmabuf->fragsize - (dmabuf->swptr % dmabuf->fragsize);
+			dmabuf->swptr += val;
+			dmabuf->count += val;
+		}
+		return 0;
+
+	case SNDCTL_DSP_SUBDIVIDE:
+		if (dmabuf->subdivision)
+			return -EINVAL;
+		if (get_user(val, p))
+			return -EFAULT;
+		if (val != 1 && val != 2 && val != 4)
+			return -EINVAL;
+#ifdef DEBUG
+		printk("SNDCTL_DSP_SUBDIVIDE %d\n", val);
+#endif
+		dmabuf->subdivision = val;
+		dmabuf->ready = 0;
+		return 0;
+
+	case SNDCTL_DSP_SETFRAGMENT:
+		if (get_user(val, p))
+			return -EFAULT;
+
+		dmabuf->ossfragsize = 1<<(val & 0xffff);
+		dmabuf->ossmaxfrags = (val >> 16) & 0xffff;
+		if (!dmabuf->ossfragsize || !dmabuf->ossmaxfrags)
+			return -EINVAL;
+		/*
+		 * Bound the frag size into our allowed range of 256 - 4096
+		 */
+		if (dmabuf->ossfragsize < 256)
+			dmabuf->ossfragsize = 256;
+		else if (dmabuf->ossfragsize > 4096)
+			dmabuf->ossfragsize = 4096;
+		/*
+		 * The numfrags could be something reasonable, or it could
+		 * be 0xffff meaning "Give me as much as possible".  So,
+		 * we check the numfrags * fragsize doesn't exceed our
+		 * 64k buffer limit, nor is it less than our 8k minimum.
+		 * If it fails either one of these checks, then adjust the
+		 * number of fragments, not the size of them.  It's OK if
+		 * our number of fragments doesn't equal 32 or anything
+		 * like our hardware based number now since we are using
+		 * a different frag count for the hardware.  Before we get
+		 * into this though, bound the maxfrags to avoid overflow
+		 * issues.  A reasonable bound would be 64k / 256 since our
+		 * maximum buffer size is 64k and our minimum frag size is
+		 * 256.  On the other end, our minimum buffer size is 8k and
+		 * our maximum frag size is 4k, so the lower bound should
+		 * be 2.
+		 */
+
+		if(dmabuf->ossmaxfrags > 256)
+			dmabuf->ossmaxfrags = 256;
+		else if (dmabuf->ossmaxfrags < 2)
+			dmabuf->ossmaxfrags = 2;
+
+		val = dmabuf->ossfragsize * dmabuf->ossmaxfrags;
+		while (val < 8192) {
+		    val <<= 1;
+		    dmabuf->ossmaxfrags <<= 1;
+		}
+		while (val > 65536) {
+		    val >>= 1;
+		    dmabuf->ossmaxfrags >>= 1;
+		}
+		dmabuf->ready = 0;
+#ifdef DEBUG
+		printk("SNDCTL_DSP_SETFRAGMENT 0x%x, %d, %d\n", val,
+			dmabuf->ossfragsize, dmabuf->ossmaxfrags);
+#endif
+
+		return 0;
+
+	case SNDCTL_DSP_GETOSPACE:
+		if (!(file->f_mode & FMODE_WRITE))
+			return -EINVAL;
+		if (!dmabuf->ready && (val = prog_dmabuf(state, 0)) != 0)
+			return val;
+		spin_lock_irqsave(&state->card->lock, flags);
+		i810_update_ptr(state);
+		abinfo.fragsize = dmabuf->userfragsize;
+		abinfo.fragstotal = dmabuf->userfrags;
+		if (dmabuf->mapped)
+ 			abinfo.bytes = dmabuf->dmasize;
+  		else
+ 			abinfo.bytes = i810_get_free_write_space(state);
+		abinfo.fragments = abinfo.bytes / dmabuf->userfragsize;
+		spin_unlock_irqrestore(&state->card->lock, flags);
+#if defined(DEBUG) || defined(DEBUG_MMAP)
+		printk("SNDCTL_DSP_GETOSPACE %d, %d, %d, %d\n", abinfo.bytes,
+			abinfo.fragsize, abinfo.fragments, abinfo.fragstotal);
+#endif
+		return copy_to_user(argp, &abinfo, sizeof(abinfo)) ? -EFAULT : 0;
+
+	case SNDCTL_DSP_GETOPTR:
+		if (!(file->f_mode & FMODE_WRITE))
+			return -EINVAL;
+		if (!dmabuf->ready && (val = prog_dmabuf(state, 0)) != 0)
+			return val;
+		spin_lock_irqsave(&state->card->lock, flags);
+		val = i810_get_free_write_space(state);
+		cinfo.bytes = dmabuf->total_bytes;
+		cinfo.ptr = dmabuf->hwptr;
+		cinfo.blocks = val/dmabuf->userfragsize;
+		if (dmabuf->mapped && (dmabuf->trigger & PCM_ENABLE_OUTPUT)) {
+			dmabuf->count += val;
+			dmabuf->swptr = (dmabuf->swptr + val) % dmabuf->dmasize;
+			__i810_update_lvi(state, 0);
+		}
+		spin_unlock_irqrestore(&state->card->lock, flags);
+#if defined(DEBUG) || defined(DEBUG_MMAP)
+		printk("SNDCTL_DSP_GETOPTR %d, %d, %d, %d\n", cinfo.bytes,
+			cinfo.blocks, cinfo.ptr, dmabuf->count);
+#endif
+		return copy_to_user(argp, &cinfo, sizeof(cinfo)) ? -EFAULT : 0;
+
+	case SNDCTL_DSP_GETISPACE:
+		if (!(file->f_mode & FMODE_READ))
+			return -EINVAL;
+		if (!dmabuf->ready && (val = prog_dmabuf(state, 1)) != 0)
+			return val;
+		spin_lock_irqsave(&state->card->lock, flags);
+		abinfo.bytes = i810_get_available_read_data(state);
+		abinfo.fragsize = dmabuf->userfragsize;
+		abinfo.fragstotal = dmabuf->userfrags;
+		abinfo.fragments = abinfo.bytes / dmabuf->userfragsize;
+		spin_unlock_irqrestore(&state->card->lock, flags);
+#if defined(DEBUG) || defined(DEBUG_MMAP)
+		printk("SNDCTL_DSP_GETISPACE %d, %d, %d, %d\n", abinfo.bytes,
+			abinfo.fragsize, abinfo.fragments, abinfo.fragstotal);
+#endif
+		return copy_to_user(argp, &abinfo, sizeof(abinfo)) ? -EFAULT : 0;
+
+	case SNDCTL_DSP_GETIPTR:
+		if (!(file->f_mode & FMODE_READ))
+			return -EINVAL;
+		if (!dmabuf->ready && (val = prog_dmabuf(state, 0)) != 0)
+			return val;
+		spin_lock_irqsave(&state->card->lock, flags);
+		val = i810_get_available_read_data(state);
+		cinfo.bytes = dmabuf->total_bytes;
+		cinfo.blocks = val/dmabuf->userfragsize;
+		cinfo.ptr = dmabuf->hwptr;
+		if (dmabuf->mapped && (dmabuf->trigger & PCM_ENABLE_INPUT)) {
+			dmabuf->count -= val;
+			dmabuf->swptr = (dmabuf->swptr + val) % dmabuf->dmasize;
+			__i810_update_lvi(state, 1);
+		}
+		spin_unlock_irqrestore(&state->card->lock, flags);
+#if defined(DEBUG) || defined(DEBUG_MMAP)
+		printk("SNDCTL_DSP_GETIPTR %d, %d, %d, %d\n", cinfo.bytes,
+			cinfo.blocks, cinfo.ptr, dmabuf->count);
+#endif
+		return copy_to_user(argp, &cinfo, sizeof(cinfo)) ? -EFAULT : 0;
+
+	case SNDCTL_DSP_NONBLOCK:
+#ifdef DEBUG
+		printk("SNDCTL_DSP_NONBLOCK\n");
+#endif
+		file->f_flags |= O_NONBLOCK;
+		return 0;
+
+	case SNDCTL_DSP_GETCAPS:
+#ifdef DEBUG
+		printk("SNDCTL_DSP_GETCAPS\n");
+#endif
+	    return put_user(DSP_CAP_REALTIME|DSP_CAP_TRIGGER|DSP_CAP_MMAP|DSP_CAP_BIND,
+			    p);
+
+	case SNDCTL_DSP_GETTRIGGER:
+		val = 0;
+#ifdef DEBUG
+		printk("SNDCTL_DSP_GETTRIGGER 0x%x\n", dmabuf->trigger);
+#endif
+		return put_user(dmabuf->trigger, p);
+
+	case SNDCTL_DSP_SETTRIGGER:
+		if (get_user(val, p))
+			return -EFAULT;
+#if defined(DEBUG) || defined(DEBUG_MMAP)
+		printk("SNDCTL_DSP_SETTRIGGER 0x%x\n", val);
+#endif
+		/* silently ignore invalid PCM_ENABLE_xxx bits,
+		 * like the other drivers do
+		 */
+		if (!(file->f_mode & FMODE_READ ))
+			val &= ~PCM_ENABLE_INPUT;
+		if (!(file->f_mode & FMODE_WRITE ))
+			val &= ~PCM_ENABLE_OUTPUT;
+		if((file->f_mode & FMODE_READ) && !(val & PCM_ENABLE_INPUT) && dmabuf->enable == ADC_RUNNING) {
+			stop_adc(state);
+		}
+		if((file->f_mode & FMODE_WRITE) && !(val & PCM_ENABLE_OUTPUT) && dmabuf->enable == DAC_RUNNING) {
+			stop_dac(state);
+		}
+		dmabuf->trigger = val;
+		if((val & PCM_ENABLE_OUTPUT) && !(dmabuf->enable & DAC_RUNNING)) {
+			if (!dmabuf->write_channel) {
+				dmabuf->ready = 0;
+				dmabuf->write_channel = state->card->alloc_pcm_channel(state->card);
+				if (!dmabuf->write_channel)
+					return -EBUSY;
+			}
+			if (!dmabuf->ready && (ret = prog_dmabuf(state, 0)))
+				return ret;
+			if (dmabuf->mapped) {
+				spin_lock_irqsave(&state->card->lock, flags);
+				i810_update_ptr(state);
+				dmabuf->count = 0;
+				dmabuf->swptr = dmabuf->hwptr;
+				dmabuf->count = i810_get_free_write_space(state);
+				dmabuf->swptr = (dmabuf->swptr + dmabuf->count) % dmabuf->dmasize;
+				spin_unlock_irqrestore(&state->card->lock, flags);
+			}
+			i810_update_lvi(state, 0);
+			start_dac(state);
+		}
+		if((val & PCM_ENABLE_INPUT) && !(dmabuf->enable & ADC_RUNNING)) {
+			if (!dmabuf->read_channel) {
+				dmabuf->ready = 0;
+				dmabuf->read_channel = state->card->alloc_rec_pcm_channel(state->card);
+				if (!dmabuf->read_channel)
+					return -EBUSY;
+			}
+			if (!dmabuf->ready && (ret = prog_dmabuf(state, 1)))
+				return ret;
+			if (dmabuf->mapped) {
+				spin_lock_irqsave(&state->card->lock, flags);
+				i810_update_ptr(state);
+				dmabuf->swptr = dmabuf->hwptr;
+				dmabuf->count = 0;
+				spin_unlock_irqrestore(&state->card->lock, flags);
+			}
+			i810_update_lvi(state, 1);
+			start_adc(state);
+		}
+		return 0;
+
+	case SNDCTL_DSP_SETDUPLEX:
+#ifdef DEBUG
+		printk("SNDCTL_DSP_SETDUPLEX\n");
+#endif
+		return -EINVAL;
+
+	case SNDCTL_DSP_GETODELAY:
+		if (!(file->f_mode & FMODE_WRITE))
+			return -EINVAL;
+		spin_lock_irqsave(&state->card->lock, flags);
+		i810_update_ptr(state);
+		val = dmabuf->count;
+		spin_unlock_irqrestore(&state->card->lock, flags);
+#ifdef DEBUG
+		printk("SNDCTL_DSP_GETODELAY %d\n", dmabuf->count);
+#endif
+		return put_user(val, p);
+
+	case SOUND_PCM_READ_RATE:
+#ifdef DEBUG
+		printk("SOUND_PCM_READ_RATE %d\n", dmabuf->rate);
+#endif
+		return put_user(dmabuf->rate, p);
+
+	case SOUND_PCM_READ_CHANNELS:
+#ifdef DEBUG
+		printk("SOUND_PCM_READ_CHANNELS\n");
+#endif
+		return put_user(2, p);
+
+	case SOUND_PCM_READ_BITS:
+#ifdef DEBUG
+		printk("SOUND_PCM_READ_BITS\n");
+#endif
+		return put_user(AFMT_S16_LE, p);
+
+	case SNDCTL_DSP_SETSPDIF: /* Set S/PDIF Control register */
+#ifdef DEBUG
+		printk("SNDCTL_DSP_SETSPDIF\n");
+#endif
+		if (get_user(val, p))
+			return -EFAULT;
+
+		/* Check to make sure the codec supports S/PDIF transmitter */
+
+		if((state->card->ac97_features & 4)) {
+			/* mask out the transmitter speed bits so the user can't set them */
+			val &= ~0x3000;
+
+			/* Add the current transmitter speed bits to the passed value */
+			ret = i810_ac97_get(codec, AC97_SPDIF_CONTROL);
+			val |= (ret & 0x3000);
+
+			i810_ac97_set(codec, AC97_SPDIF_CONTROL, val);
+			if(i810_ac97_get(codec, AC97_SPDIF_CONTROL) != val ) {
+				printk(KERN_ERR "i810_audio: Unable to set S/PDIF configuration to 0x%04x.\n", val);
+				return -EFAULT;
+			}
+		}
+#ifdef DEBUG
+		else 
+			printk(KERN_WARNING "i810_audio: S/PDIF transmitter not avalible.\n");
+#endif
+		return put_user(val, p);
+
+	case SNDCTL_DSP_GETSPDIF: /* Get S/PDIF Control register */
+#ifdef DEBUG
+		printk("SNDCTL_DSP_GETSPDIF\n");
+#endif
+		if (get_user(val, p))
+			return -EFAULT;
+
+		/* Check to make sure the codec supports S/PDIF transmitter */
+
+		if(!(state->card->ac97_features & 4)) {
+#ifdef DEBUG
+			printk(KERN_WARNING "i810_audio: S/PDIF transmitter not avalible.\n");
+#endif
+			val = 0;
+		} else {
+			val = i810_ac97_get(codec, AC97_SPDIF_CONTROL);
+		}
+		//return put_user((val & 0xcfff), p);
+		return put_user(val, p);
+   			
+	case SNDCTL_DSP_GETCHANNELMASK:
+#ifdef DEBUG
+		printk("SNDCTL_DSP_GETCHANNELMASK\n");
+#endif
+		if (get_user(val, p))
+			return -EFAULT;
+		
+		/* Based on AC'97 DAC support, not ICH hardware */
+		val = DSP_BIND_FRONT;
+		if ( state->card->ac97_features & 0x0004 )
+			val |= DSP_BIND_SPDIF;
+
+		if ( state->card->ac97_features & 0x0080 )
+			val |= DSP_BIND_SURR;
+		if ( state->card->ac97_features & 0x0140 )
+			val |= DSP_BIND_CENTER_LFE;
+
+		return put_user(val, p);
+
+	case SNDCTL_DSP_BIND_CHANNEL:
+#ifdef DEBUG
+		printk("SNDCTL_DSP_BIND_CHANNEL\n");
+#endif
+		if (get_user(val, p))
+			return -EFAULT;
+		if ( val == DSP_BIND_QUERY ) {
+			val = DSP_BIND_FRONT; /* Always report this as being enabled */
+			if ( state->card->ac97_status & SPDIF_ON ) 
+				val |= DSP_BIND_SPDIF;
+			else {
+				if ( state->card->ac97_status & SURR_ON )
+					val |= DSP_BIND_SURR;
+				if ( state->card->ac97_status & CENTER_LFE_ON )
+					val |= DSP_BIND_CENTER_LFE;
+			}
+		} else {  /* Not a query, set it */
+			if (!(file->f_mode & FMODE_WRITE))
+				return -EINVAL;
+			if ( dmabuf->enable == DAC_RUNNING ) {
+				stop_dac(state);
+			}
+			if ( val & DSP_BIND_SPDIF ) {  /* Turn on SPDIF */
+				/*  Ok, this should probably define what slots
+				 *  to use. For now, we'll only set it to the
+				 *  defaults:
+				 * 
+				 *   non multichannel codec maps to slots 3&4
+				 *   2 channel codec maps to slots 7&8
+				 *   4 channel codec maps to slots 6&9
+				 *   6 channel codec maps to slots 10&11
+				 *
+				 *  there should be some way for the app to
+				 *  select the slot assignment.
+				 */
+	
+				i810_set_spdif_output ( state, AC97_EA_SPSA_3_4, dmabuf->rate );
+				if ( !(state->card->ac97_status & SPDIF_ON) )
+					val &= ~DSP_BIND_SPDIF;
+			} else {
+				int mask;
+				int channels;
+
+				/* Turn off S/PDIF if it was on */
+				if ( state->card->ac97_status & SPDIF_ON ) 
+					i810_set_spdif_output ( state, -1, 0 );
+				
+				mask = val & (DSP_BIND_FRONT | DSP_BIND_SURR | DSP_BIND_CENTER_LFE);
+				switch (mask) {
+					case DSP_BIND_FRONT:
+						channels = 2;
+						break;
+					case DSP_BIND_FRONT|DSP_BIND_SURR:
+						channels = 4;
+						break;
+					case DSP_BIND_FRONT|DSP_BIND_SURR|DSP_BIND_CENTER_LFE:
+						channels = 6;
+						break;
+					default:
+						val = DSP_BIND_FRONT;
+						channels = 2;
+						break;
+				}
+				i810_set_dac_channels ( state, channels );
+
+				/* check that they really got turned on */
+				if (!(state->card->ac97_status & SURR_ON))
+					val &= ~DSP_BIND_SURR;
+				if (!(state->card->ac97_status & CENTER_LFE_ON))
+					val &= ~DSP_BIND_CENTER_LFE;
+			}
+		}
+		return put_user(val, p);
+		
+	case SNDCTL_DSP_MAPINBUF:
+	case SNDCTL_DSP_MAPOUTBUF:
+	case SNDCTL_DSP_SETSYNCRO:
+	case SOUND_PCM_WRITE_FILTER:
+	case SOUND_PCM_READ_FILTER:
+#ifdef DEBUG
+		printk("SNDCTL_* -EINVAL\n");
+#endif
+		return -EINVAL;
+	}
+	return -EINVAL;
+}
+
+static int i810_open(struct inode *inode, struct file *file)
+{
+	int i = 0;
+	struct i810_card *card = devs;
+	struct i810_state *state = NULL;
+	struct dmabuf *dmabuf = NULL;
+
+	/* find an avaiable virtual channel (instance of /dev/dsp) */
+	while (card != NULL) {
+		/*
+		 * If we are initializing and then fail, card could go
+		 * away unuexpectedly while we are in the for() loop.
+		 * So, check for card on each iteration before we check
+		 * for card->initializing to avoid a possible oops.
+		 * This usually only matters for times when the driver is
+		 * autoloaded by kmod.
+		 */
+		for (i = 0; i < 50 && card && card->initializing; i++) {
+			set_current_state(TASK_UNINTERRUPTIBLE);
+			schedule_timeout(HZ/20);
+		}
+		for (i = 0; i < NR_HW_CH && card && !card->initializing; i++) {
+			if (card->states[i] == NULL) {
+				state = card->states[i] = (struct i810_state *)
+					kmalloc(sizeof(struct i810_state), GFP_KERNEL);
+				if (state == NULL)
+					return -ENOMEM;
+				memset(state, 0, sizeof(struct i810_state));
+				dmabuf = &state->dmabuf;
+				goto found_virt;
+			}
+		}
+		card = card->next;
+	}
+	/* no more virtual channel avaiable */
+	if (!state)
+		return -ENODEV;
+
+found_virt:
+	/* initialize the virtual channel */
+	state->virt = i;
+	state->card = card;
+	state->magic = I810_STATE_MAGIC;
+	init_waitqueue_head(&dmabuf->wait);
+	init_MUTEX(&state->open_sem);
+	file->private_data = state;
+	dmabuf->trigger = 0;
+
+	/* allocate hardware channels */
+	if(file->f_mode & FMODE_READ) {
+		if((dmabuf->read_channel = card->alloc_rec_pcm_channel(card)) == NULL) {
+			kfree (card->states[i]);
+			card->states[i] = NULL;
+			return -EBUSY;
+		}
+		dmabuf->trigger |= PCM_ENABLE_INPUT;
+		i810_set_adc_rate(state, 8000);
+	}
+	if(file->f_mode & FMODE_WRITE) {
+		if((dmabuf->write_channel = card->alloc_pcm_channel(card)) == NULL) {
+			/* make sure we free the record channel allocated above */
+			if(file->f_mode & FMODE_READ)
+				card->free_pcm_channel(card,dmabuf->read_channel->num);
+			kfree (card->states[i]);
+			card->states[i] = NULL;
+			return -EBUSY;
+		}
+		/* Initialize to 8kHz?  What if we don't support 8kHz? */
+		/*  Let's change this to check for S/PDIF stuff */
+	
+		dmabuf->trigger |= PCM_ENABLE_OUTPUT;
+		if ( spdif_locked ) {
+			i810_set_dac_rate(state, spdif_locked);
+			i810_set_spdif_output(state, AC97_EA_SPSA_3_4, spdif_locked);
+		} else {
+			i810_set_dac_rate(state, 8000);
+			/* Put the ACLink in 2 channel mode by default */
+			i = I810_IOREADL(card, GLOB_CNT);
+			I810_IOWRITEL(i & 0xffcfffff, card, GLOB_CNT);
+		}
+	}
+		
+	/* set default sample format. According to OSS Programmer's Guide  /dev/dsp
+	   should be default to unsigned 8-bits, mono, with sample rate 8kHz and
+	   /dev/dspW will accept 16-bits sample, but we don't support those so we
+	   set it immediately to stereo and 16bit, which is all we do support */
+	dmabuf->fmt |= I810_FMT_16BIT | I810_FMT_STEREO;
+	dmabuf->ossfragsize = 0;
+	dmabuf->ossmaxfrags  = 0;
+	dmabuf->subdivision  = 0;
+
+	state->open_mode |= file->f_mode & (FMODE_READ | FMODE_WRITE);
+
+	return nonseekable_open(inode, file);
+}
+
+static int i810_release(struct inode *inode, struct file *file)
+{
+	struct i810_state *state = (struct i810_state *)file->private_data;
+	struct i810_card *card = state->card;
+	struct dmabuf *dmabuf = &state->dmabuf;
+	unsigned long flags;
+
+	lock_kernel();
+
+	/* stop DMA state machine and free DMA buffers/channels */
+	if(dmabuf->trigger & PCM_ENABLE_OUTPUT) {
+		drain_dac(state, 0);
+	}
+	if(dmabuf->trigger & PCM_ENABLE_INPUT) {
+		stop_adc(state);
+	}
+	spin_lock_irqsave(&card->lock, flags);
+	dealloc_dmabuf(state);
+	if (file->f_mode & FMODE_WRITE) {
+		state->card->free_pcm_channel(state->card, dmabuf->write_channel->num);
+	}
+	if (file->f_mode & FMODE_READ) {
+		state->card->free_pcm_channel(state->card, dmabuf->read_channel->num);
+	}
+
+	state->card->states[state->virt] = NULL;
+	kfree(state);
+	spin_unlock_irqrestore(&card->lock, flags);
+	unlock_kernel();
+
+	return 0;
+}
+
+static /*const*/ struct file_operations i810_audio_fops = {
+	.owner		= THIS_MODULE,
+	.llseek		= no_llseek,
+	.read		= i810_read,
+	.write		= i810_write,
+	.poll		= i810_poll,
+	.ioctl		= i810_ioctl,
+	.mmap		= i810_mmap,
+	.open		= i810_open,
+	.release	= i810_release,
+};
+
+/* Write AC97 codec registers */
+
+static u16 i810_ac97_get_mmio(struct ac97_codec *dev, u8 reg)
+{
+	struct i810_card *card = dev->private_data;
+	int count = 100;
+	u16 reg_set = IO_REG_OFF(dev) | (reg&0x7f);
+	
+	while(count-- && (readb(card->iobase_mmio + CAS) & 1)) 
+		udelay(1);
+	
+#ifdef DEBUG_MMIO
+	{
+		u16 ans = readw(card->ac97base_mmio + reg_set);
+		printk(KERN_DEBUG "i810_audio: ac97_get_mmio(%d) -> 0x%04X\n", ((int) reg_set) & 0xffff, (u32) ans);
+		return ans;
+	}
+#else
+	return readw(card->ac97base_mmio + reg_set);
+#endif
+}
+
+static u16 i810_ac97_get_io(struct ac97_codec *dev, u8 reg)
+{
+	struct i810_card *card = dev->private_data;
+	int count = 100;
+	u16 reg_set = IO_REG_OFF(dev) | (reg&0x7f);
+	
+	while(count-- && (I810_IOREADB(card, CAS) & 1)) 
+		udelay(1);
+	
+	return inw(card->ac97base + reg_set);
+}
+
+static void i810_ac97_set_mmio(struct ac97_codec *dev, u8 reg, u16 data)
+{
+	struct i810_card *card = dev->private_data;
+	int count = 100;
+	u16 reg_set = IO_REG_OFF(dev) | (reg&0x7f);
+	
+	while(count-- && (readb(card->iobase_mmio + CAS) & 1)) 
+		udelay(1);
+	
+	writew(data, card->ac97base_mmio + reg_set);
+
+#ifdef DEBUG_MMIO
+	printk(KERN_DEBUG "i810_audio: ac97_set_mmio(0x%04X, %d)\n", (u32) data, ((int) reg_set) & 0xffff);
+#endif
+}
+
+static void i810_ac97_set_io(struct ac97_codec *dev, u8 reg, u16 data)
+{
+	struct i810_card *card = dev->private_data;
+	int count = 100;
+	u16 reg_set = IO_REG_OFF(dev) | (reg&0x7f);
+	
+	while(count-- && (I810_IOREADB(card, CAS) & 1)) 
+		udelay(1);
+	
+        outw(data, card->ac97base + reg_set);
+}
+
+static u16 i810_ac97_get(struct ac97_codec *dev, u8 reg)
+{
+	struct i810_card *card = dev->private_data;
+	u16 ret;
+	
+	spin_lock(&card->ac97_lock);
+	if (card->use_mmio) {
+		ret = i810_ac97_get_mmio(dev, reg);
+	}
+	else {
+		ret = i810_ac97_get_io(dev, reg);
+	}
+	spin_unlock(&card->ac97_lock);
+	
+	return ret;
+}
+
+static void i810_ac97_set(struct ac97_codec *dev, u8 reg, u16 data)
+{
+	struct i810_card *card = dev->private_data;
+	
+	spin_lock(&card->ac97_lock);
+	if (card->use_mmio) {
+		i810_ac97_set_mmio(dev, reg, data);
+	}
+	else {
+		i810_ac97_set_io(dev, reg, data);
+	}
+	spin_unlock(&card->ac97_lock);
+}
+
+
+/* OSS /dev/mixer file operation methods */
+
+static int i810_open_mixdev(struct inode *inode, struct file *file)
+{
+	int i;
+	int minor = iminor(inode);
+	struct i810_card *card = devs;
+
+	for (card = devs; card != NULL; card = card->next) {
+		/*
+		 * If we are initializing and then fail, card could go
+		 * away unuexpectedly while we are in the for() loop.
+		 * So, check for card on each iteration before we check
+		 * for card->initializing to avoid a possible oops.
+		 * This usually only matters for times when the driver is
+		 * autoloaded by kmod.
+		 */
+		for (i = 0; i < 50 && card && card->initializing; i++) {
+			set_current_state(TASK_UNINTERRUPTIBLE);
+			schedule_timeout(HZ/20);
+		}
+		for (i = 0; i < NR_AC97 && card && !card->initializing; i++) 
+			if (card->ac97_codec[i] != NULL &&
+			    card->ac97_codec[i]->dev_mixer == minor) {
+				file->private_data = card->ac97_codec[i];
+				return nonseekable_open(inode, file);
+			}
+	}
+	return -ENODEV;
+}
+
+static int i810_ioctl_mixdev(struct inode *inode, struct file *file, unsigned int cmd,
+				unsigned long arg)
+{
+	struct ac97_codec *codec = (struct ac97_codec *)file->private_data;
+
+	return codec->mixer_ioctl(codec, cmd, arg);
+}
+
+static /*const*/ struct file_operations i810_mixer_fops = {
+	.owner		= THIS_MODULE,
+	.llseek		= no_llseek,
+	.ioctl		= i810_ioctl_mixdev,
+	.open		= i810_open_mixdev,
+};
+
+/* AC97 codec initialisation.  These small functions exist so we don't
+   duplicate code between module init and apm resume */
+
+static inline int i810_ac97_exists(struct i810_card *card, int ac97_number)
+{
+	u32 reg = I810_IOREADL(card, GLOB_STA);
+	switch (ac97_number) {
+	case 0:
+		return reg & (1<<8);
+	case 1: 
+		return reg & (1<<9);
+	case 2:
+		return reg & (1<<28);
+	}
+	return 0;
+}
+
+static inline int i810_ac97_enable_variable_rate(struct ac97_codec *codec)
+{
+	i810_ac97_set(codec, AC97_EXTENDED_STATUS, 9);
+	i810_ac97_set(codec,AC97_EXTENDED_STATUS,
+		      i810_ac97_get(codec, AC97_EXTENDED_STATUS)|0xE800);
+	
+	return (i810_ac97_get(codec, AC97_EXTENDED_STATUS)&1);
+}
+
+
+static int i810_ac97_probe_and_powerup(struct i810_card *card,struct ac97_codec *codec)
+{
+	/* Returns 0 on failure */
+	int i;
+
+	if (ac97_probe_codec(codec) == 0) return 0;
+	
+	/* power it all up */
+	i810_ac97_set(codec, AC97_POWER_CONTROL,
+		      i810_ac97_get(codec, AC97_POWER_CONTROL) & ~0x7f00);
+
+	/* wait for analog ready */
+	for (i=100; i && ((i810_ac97_get(codec, AC97_POWER_CONTROL) & 0xf) != 0xf); i--)
+	{
+		set_current_state(TASK_UNINTERRUPTIBLE);
+		schedule_timeout(HZ/20);
+	} 
+	return i;
+}
+
+static int is_new_ich(u16 pci_id)
+{
+	switch (pci_id) {
+	case PCI_DEVICE_ID_INTEL_82801DB_5:
+	case PCI_DEVICE_ID_INTEL_82801EB_5:
+	case PCI_DEVICE_ID_INTEL_ESB_5:
+	case PCI_DEVICE_ID_INTEL_ICH6_18:
+		return 1;
+	default:
+		break;
+	}
+
+	return 0;
+}
+
+static inline int ich_use_mmio(struct i810_card *card)
+{
+	return is_new_ich(card->pci_id) && card->use_mmio;
+}
+
+/**
+ *	i810_ac97_power_up_bus	-	bring up AC97 link
+ *	@card : ICH audio device to power up
+ *
+ *	Bring up the ACLink AC97 codec bus
+ */
+ 
+static int i810_ac97_power_up_bus(struct i810_card *card)
+{	
+	u32 reg = I810_IOREADL(card, GLOB_CNT);
+	int i;
+	int primary_codec_id = 0;
+
+	if((reg&2)==0)	/* Cold required */
+		reg|=2;
+	else
+		reg|=4;	/* Warm */
+		
+	reg&=~8;	/* ACLink on */
+	
+	/* At this point we deassert AC_RESET # */
+	I810_IOWRITEL(reg , card, GLOB_CNT);
+
+	/* We must now allow time for the Codec initialisation.
+	   600mS is the specified time */
+	   	
+	for(i=0;i<10;i++)
+	{
+		if((I810_IOREADL(card, GLOB_CNT)&4)==0)
+			break;
+
+		set_current_state(TASK_UNINTERRUPTIBLE);
+		schedule_timeout(HZ/20);
+	}
+	if(i==10)
+	{
+		printk(KERN_ERR "i810_audio: AC'97 reset failed.\n");
+		return 0;
+	}
+
+	set_current_state(TASK_UNINTERRUPTIBLE);
+	schedule_timeout(HZ/2);
+
+	/*
+	 *	See if the primary codec comes ready. This must happen
+	 *	before we start doing DMA stuff
+	 */	
+	/* see i810_ac97_init for the next 10 lines (jsaw) */
+	if (card->use_mmio)
+		readw(card->ac97base_mmio);
+	else
+		inw(card->ac97base);
+	if (ich_use_mmio(card)) {
+		primary_codec_id = (int) readl(card->iobase_mmio + SDM) & 0x3;
+		printk(KERN_INFO "i810_audio: Primary codec has ID %d\n",
+		       primary_codec_id);
+	}
+
+	if(! i810_ac97_exists(card, primary_codec_id))
+	{
+		printk(KERN_INFO "i810_audio: Codec not ready.. wait.. ");
+		set_current_state(TASK_UNINTERRUPTIBLE);
+		schedule_timeout(HZ);	/* actually 600mS by the spec */
+
+		if(i810_ac97_exists(card, primary_codec_id))
+			printk("OK\n");
+		else 
+			printk("no response.\n");
+	}
+	if (card->use_mmio)
+		readw(card->ac97base_mmio);
+	else
+		inw(card->ac97base);
+	return 1;
+}
+
+static int __devinit i810_ac97_init(struct i810_card *card)
+{
+	int num_ac97 = 0;
+	int ac97_id;
+	int total_channels = 0;
+	int nr_ac97_max = card_cap[card->pci_id_internal].nr_ac97;
+	struct ac97_codec *codec;
+	u16 eid;
+	u32 reg;
+
+	if(!i810_ac97_power_up_bus(card)) return 0;
+
+	/* Number of channels supported */
+	/* What about the codec?  Just because the ICH supports */
+	/* multiple channels doesn't mean the codec does.       */
+	/* we'll have to modify this in the codec section below */
+	/* to reflect what the codec has.                       */
+	/* ICH and ICH0 only support 2 channels so don't bother */
+	/* to check....                                         */
+
+	card->channels = 2;
+	reg = I810_IOREADL(card, GLOB_STA);
+	if ( reg & 0x0200000 )
+		card->channels = 6;
+	else if ( reg & 0x0100000 )
+		card->channels = 4;
+	printk(KERN_INFO "i810_audio: Audio Controller supports %d channels.\n", card->channels);
+	printk(KERN_INFO "i810_audio: Defaulting to base 2 channel mode.\n");
+	reg = I810_IOREADL(card, GLOB_CNT);
+	I810_IOWRITEL(reg & 0xffcfffff, card, GLOB_CNT);
+		
+	for (num_ac97 = 0; num_ac97 < NR_AC97; num_ac97++) 
+		card->ac97_codec[num_ac97] = NULL;
+
+	/*@FIXME I don't know, if I'm playing to safe here... (jsaw) */
+	if ((nr_ac97_max > 2) && !card->use_mmio) nr_ac97_max = 2;
+
+	for (num_ac97 = 0; num_ac97 < nr_ac97_max; num_ac97++) {
+		/* codec reset */
+		printk(KERN_INFO "i810_audio: Resetting connection %d\n", num_ac97);
+		if (card->use_mmio)
+			readw(card->ac97base_mmio + 0x80*num_ac97);
+		else
+			inw(card->ac97base + 0x80*num_ac97);
+
+		/* If we have the SDATA_IN Map Register, as on ICH4, we
+		   do not loop thru all possible codec IDs but thru all 
+		   possible IO channels. Bit 0:1 of SDM then holds the 
+		   last codec ID spoken to. 
+		*/
+		if (ich_use_mmio(card)) {
+			ac97_id = (int) readl(card->iobase_mmio + SDM) & 0x3;
+			printk(KERN_INFO "i810_audio: Connection %d with codec id %d\n",
+			       num_ac97, ac97_id);
+		}
+		else {
+			ac97_id = num_ac97;
+		}
+
+		/* The ICH programmer's reference says you should   */
+		/* check the ready status before probing. So we chk */
+		/*   What do we do if it's not ready?  Wait and try */
+		/*   again, or abort?                               */
+		if (!i810_ac97_exists(card, ac97_id)) {
+			if(num_ac97 == 0)
+				printk(KERN_ERR "i810_audio: Primary codec not ready.\n");
+		}
+		
+		if ((codec = ac97_alloc_codec()) == NULL)
+			return -ENOMEM;
+
+		/* initialize some basic codec information, other fields will be filled
+		   in ac97_probe_codec */
+		codec->private_data = card;
+		codec->id = ac97_id;
+		card->ac97_id_map[ac97_id] = num_ac97 * 0x80;
+
+		if (card->use_mmio) {	
+			codec->codec_read = i810_ac97_get_mmio;
+			codec->codec_write = i810_ac97_set_mmio;
+		}
+		else {
+			codec->codec_read = i810_ac97_get_io;
+			codec->codec_write = i810_ac97_set_io;
+		}
+	
+		if(!i810_ac97_probe_and_powerup(card,codec)) {
+			printk(KERN_ERR "i810_audio: timed out waiting for codec %d analog ready.\n", ac97_id);
+			ac97_release_codec(codec);
+			break;	/* it didn't work */
+		}
+		/* Store state information about S/PDIF transmitter */
+		card->ac97_status = 0;
+		
+		/* Don't attempt to get eid until powerup is complete */
+		eid = i810_ac97_get(codec, AC97_EXTENDED_ID);
+
+		if(eid==0xFFFF)
+		{
+			printk(KERN_WARNING "i810_audio: no codec attached ?\n");
+			ac97_release_codec(codec);
+			break;
+		}
+		
+		/* Check for an AC97 1.0 soft modem (ID1) */
+		
+		if(codec->modem)
+		{
+			printk(KERN_WARNING "i810_audio: codec %d is a softmodem - skipping.\n", ac97_id);
+			ac97_release_codec(codec);
+			continue;
+		}
+		
+		card->ac97_features = eid;
+
+		/* Now check the codec for useful features to make up for
+		   the dumbness of the 810 hardware engine */
+
+		if(!(eid&0x0001))
+			printk(KERN_WARNING "i810_audio: only 48Khz playback available.\n");
+		else
+		{
+			if(!i810_ac97_enable_variable_rate(codec)) {
+				printk(KERN_WARNING "i810_audio: Codec refused to allow VRA, using 48Khz only.\n");
+				card->ac97_features&=~1;
+			}			
+		}
+   		
+		/* Turn on the amplifier */
+
+		codec->codec_write(codec, AC97_POWER_CONTROL, 
+			 codec->codec_read(codec, AC97_POWER_CONTROL) & ~0x8000);
+				
+		/* Determine how many channels the codec(s) support   */
+		/*   - The primary codec always supports 2            */
+		/*   - If the codec supports AMAP, surround DACs will */
+		/*     automaticlly get assigned to slots.            */
+		/*     * Check for surround DACs and increment if     */
+		/*       found.                                       */
+		/*   - Else check if the codec is revision 2.2        */
+		/*     * If surround DACs exist, assign them to slots */
+		/*       and increment channel count.                 */
+
+		/* All of this only applies to ICH2 and above. ICH    */
+		/* and ICH0 only support 2 channels.  ICH2 will only  */
+		/* support multiple codecs in a "split audio" config. */
+		/* as described above.                                */
+
+		/* TODO: Remove all the debugging messages!           */
+
+		if((eid & 0xc000) == 0) /* primary codec */
+			total_channels += 2; 
+
+		if(eid & 0x200) { /* GOOD, AMAP support */
+			if (eid & 0x0080) /* L/R Surround channels */
+				total_channels += 2;
+			if (eid & 0x0140) /* LFE and Center channels */
+				total_channels += 2;
+			printk("i810_audio: AC'97 codec %d supports AMAP, total channels = %d\n", ac97_id, total_channels);
+		} else if (eid & 0x0400) {  /* this only works on 2.2 compliant codecs */
+			eid &= 0xffcf;
+			if((eid & 0xc000) != 0)	{
+				switch ( total_channels ) {
+					case 2:
+						/* Set dsa1, dsa0 to 01 */
+						eid |= 0x0010;
+						break;
+					case 4:
+						/* Set dsa1, dsa0 to 10 */
+						eid |= 0x0020;
+						break;
+					case 6:
+						/* Set dsa1, dsa0 to 11 */
+						eid |= 0x0030;
+						break;
+				}
+				total_channels += 2;
+			}
+			i810_ac97_set(codec, AC97_EXTENDED_ID, eid);
+			eid = i810_ac97_get(codec, AC97_EXTENDED_ID);
+			printk("i810_audio: AC'97 codec %d, new EID value = 0x%04x\n", ac97_id, eid);
+			if (eid & 0x0080) /* L/R Surround channels */
+				total_channels += 2;
+			if (eid & 0x0140) /* LFE and Center channels */
+				total_channels += 2;
+			printk("i810_audio: AC'97 codec %d, DAC map configured, total channels = %d\n", ac97_id, total_channels);
+		} else {
+			printk("i810_audio: AC'97 codec %d Unable to map surround DAC's (or DAC's not present), total channels = %d\n", ac97_id, total_channels);
+		}
+
+		if ((codec->dev_mixer = register_sound_mixer(&i810_mixer_fops, -1)) < 0) {
+			printk(KERN_ERR "i810_audio: couldn't register mixer!\n");
+			ac97_release_codec(codec);
+			break;
+		}
+
+		card->ac97_codec[num_ac97] = codec;
+	}
+
+	/* tune up the primary codec */
+	ac97_tune_hardware(card->pci_dev, ac97_quirks, ac97_quirk);
+
+	/* pick the minimum of channels supported by ICHx or codec(s) */
+	card->channels = (card->channels > total_channels)?total_channels:card->channels;
+
+	return num_ac97;
+}
+
+static void __devinit i810_configure_clocking (void)
+{
+	struct i810_card *card;
+	struct i810_state *state;
+	struct dmabuf *dmabuf;
+	unsigned int i, offset, new_offset;
+	unsigned long flags;
+
+	card = devs;
+	/* We could try to set the clocking for multiple cards, but can you even have
+	 * more than one i810 in a machine?  Besides, clocking is global, so unless
+	 * someone actually thinks more than one i810 in a machine is possible and
+	 * decides to rewrite that little bit, setting the rate for more than one card
+	 * is a waste of time.
+	 */
+	if(card != NULL) {
+		state = card->states[0] = (struct i810_state *)
+					kmalloc(sizeof(struct i810_state), GFP_KERNEL);
+		if (state == NULL)
+			return;
+		memset(state, 0, sizeof(struct i810_state));
+		dmabuf = &state->dmabuf;
+
+		dmabuf->write_channel = card->alloc_pcm_channel(card);
+		state->virt = 0;
+		state->card = card;
+		state->magic = I810_STATE_MAGIC;
+		init_waitqueue_head(&dmabuf->wait);
+		init_MUTEX(&state->open_sem);
+		dmabuf->fmt = I810_FMT_STEREO | I810_FMT_16BIT;
+		dmabuf->trigger = PCM_ENABLE_OUTPUT;
+		i810_set_spdif_output(state, -1, 0);
+		i810_set_dac_channels(state, 2);
+		i810_set_dac_rate(state, 48000);
+		if(prog_dmabuf(state, 0) != 0) {
+			goto config_out_nodmabuf;
+		}
+		if(dmabuf->dmasize < 16384) {
+			goto config_out;
+		}
+		dmabuf->count = dmabuf->dmasize;
+		CIV_TO_LVI(card, dmabuf->write_channel->port, -1);
+		local_irq_save(flags);
+		start_dac(state);
+		offset = i810_get_dma_addr(state, 0);
+		mdelay(50);
+		new_offset = i810_get_dma_addr(state, 0);
+		stop_dac(state);
+		local_irq_restore(flags);
+		i = new_offset - offset;
+#ifdef DEBUG_INTERRUPTS
+		printk("i810_audio: %d bytes in 50 milliseconds\n", i);
+#endif
+		if(i == 0)
+			goto config_out;
+		i = i / 4 * 20;
+		if (i > 48500 || i < 47500) {
+			clocking = clocking * clocking / i;
+			printk("i810_audio: setting clocking to %d\n", clocking);
+		}
+config_out:
+		dealloc_dmabuf(state);
+config_out_nodmabuf:
+		state->card->free_pcm_channel(state->card,state->dmabuf.write_channel->num);
+		kfree(state);
+		card->states[0] = NULL;
+	}
+}
+
+/* install the driver, we do not allocate hardware channel nor DMA buffer now, they are defered 
+   until "ACCESS" time (in prog_dmabuf called by open/read/write/ioctl/mmap) */
+   
+static int __devinit i810_probe(struct pci_dev *pci_dev, const struct pci_device_id *pci_id)
+{
+	struct i810_card *card;
+
+	if (pci_enable_device(pci_dev))
+		return -EIO;
+
+	if (pci_set_dma_mask(pci_dev, I810_DMA_MASK)) {
+		printk(KERN_ERR "i810_audio: architecture does not support"
+		       " 32bit PCI busmaster DMA\n");
+		return -ENODEV;
+	}
+	
+	if ((card = kmalloc(sizeof(struct i810_card), GFP_KERNEL)) == NULL) {
+		printk(KERN_ERR "i810_audio: out of memory\n");
+		return -ENOMEM;
+	}
+	memset(card, 0, sizeof(*card));
+
+	card->initializing = 1;
+	card->pci_dev = pci_dev;
+	card->pci_id = pci_id->device;
+	card->ac97base = pci_resource_start (pci_dev, 0);
+	card->iobase = pci_resource_start (pci_dev, 1);
+
+	if (!(card->ac97base) || !(card->iobase)) {
+		card->ac97base = 0;
+		card->iobase = 0;
+	}
+
+	/* if chipset could have mmio capability, check it */ 
+	if (card_cap[pci_id->driver_data].flags & CAP_MMIO) {
+		card->ac97base_mmio_phys = pci_resource_start (pci_dev, 2);
+		card->iobase_mmio_phys = pci_resource_start (pci_dev, 3);
+
+		if ((card->ac97base_mmio_phys) && (card->iobase_mmio_phys)) {
+			card->use_mmio = 1;
+		}
+		else {
+			card->ac97base_mmio_phys = 0;
+			card->iobase_mmio_phys = 0;
+		}
+	}
+
+	if (!(card->use_mmio) && (!(card->iobase) || !(card->ac97base))) {
+		printk(KERN_ERR "i810_audio: No I/O resources available.\n");
+		goto out_mem;
+	}
+
+	card->irq = pci_dev->irq;
+	card->next = devs;
+	card->magic = I810_CARD_MAGIC;
+#ifdef CONFIG_PM
+	card->pm_suspended=0;
+#endif
+	spin_lock_init(&card->lock);
+	spin_lock_init(&card->ac97_lock);
+	devs = card;
+
+	pci_set_master(pci_dev);
+
+	printk(KERN_INFO "i810: %s found at IO 0x%04lx and 0x%04lx, "
+	       "MEM 0x%04lx and 0x%04lx, IRQ %d\n",
+	       card_names[pci_id->driver_data], 
+	       card->iobase, card->ac97base, 
+	       card->ac97base_mmio_phys, card->iobase_mmio_phys,
+	       card->irq);
+
+	card->alloc_pcm_channel = i810_alloc_pcm_channel;
+	card->alloc_rec_pcm_channel = i810_alloc_rec_pcm_channel;
+	card->alloc_rec_mic_channel = i810_alloc_rec_mic_channel;
+	card->free_pcm_channel = i810_free_pcm_channel;
+
+	if ((card->channel = pci_alloc_consistent(pci_dev,
+	    sizeof(struct i810_channel)*NR_HW_CH, &card->chandma)) == NULL) {
+		printk(KERN_ERR "i810: cannot allocate channel DMA memory\n");
+		goto out_mem;
+	}
+
+	{ /* We may dispose of this altogether some time soon, so... */
+		struct i810_channel *cp = card->channel;
+
+		cp[0].offset = 0;
+		cp[0].port = 0x00;
+		cp[0].num = 0;
+		cp[1].offset = 0;
+		cp[1].port = 0x10;
+		cp[1].num = 1;
+		cp[2].offset = 0;
+		cp[2].port = 0x20;
+		cp[2].num = 2;
+	}
+
+	/* claim our iospace and irq */
+	if (!request_region(card->iobase, 64, card_names[pci_id->driver_data])) {
+		printk(KERN_ERR "i810_audio: unable to allocate region %lx\n", card->iobase);
+		goto out_region1;
+	}
+	if (!request_region(card->ac97base, 256, card_names[pci_id->driver_data])) {
+		printk(KERN_ERR "i810_audio: unable to allocate region %lx\n", card->ac97base);
+		goto out_region2;
+	}
+
+	if (request_irq(card->irq, &i810_interrupt, SA_SHIRQ,
+			card_names[pci_id->driver_data], card)) {
+		printk(KERN_ERR "i810_audio: unable to allocate irq %d\n", card->irq);
+		goto out_pio;
+	}
+
+	if (card->use_mmio) {
+		if (request_mem_region(card->ac97base_mmio_phys, 512, "ich_audio MMBAR")) {
+			if ((card->ac97base_mmio = ioremap(card->ac97base_mmio_phys, 512))) { /*@FIXME can ioremap fail? don't know (jsaw) */
+				if (request_mem_region(card->iobase_mmio_phys, 256, "ich_audio MBBAR")) {
+					if ((card->iobase_mmio = ioremap(card->iobase_mmio_phys, 256))) {
+						printk(KERN_INFO "i810: %s mmio at 0x%04lx and 0x%04lx\n",
+						       card_names[pci_id->driver_data], 
+						       (unsigned long) card->ac97base_mmio, 
+						       (unsigned long) card->iobase_mmio); 
+					}
+					else {
+						iounmap(card->ac97base_mmio);
+						release_mem_region(card->ac97base_mmio_phys, 512);
+						release_mem_region(card->iobase_mmio_phys, 512);
+						card->use_mmio = 0;
+					}
+				}
+				else {
+					iounmap(card->ac97base_mmio);
+					release_mem_region(card->ac97base_mmio_phys, 512);
+					card->use_mmio = 0;
+				}
+			}
+		}
+		else {
+			card->use_mmio = 0;
+		}
+	}
+
+	/* initialize AC97 codec and register /dev/mixer */
+	if (i810_ac97_init(card) <= 0) {
+		free_irq(card->irq, card);
+		goto out_iospace;
+	}
+	pci_set_drvdata(pci_dev, card);
+
+	if(clocking == 0) {
+		clocking = 48000;
+		i810_configure_clocking();
+	}
+
+	/* register /dev/dsp */
+	if ((card->dev_audio = register_sound_dsp(&i810_audio_fops, -1)) < 0) {
+		int i;
+		printk(KERN_ERR "i810_audio: couldn't register DSP device!\n");
+		free_irq(card->irq, card);
+		for (i = 0; i < NR_AC97; i++)
+		if (card->ac97_codec[i] != NULL) {
+			unregister_sound_mixer(card->ac97_codec[i]->dev_mixer);
+			ac97_release_codec(card->ac97_codec[i]);
+		}
+		goto out_iospace;
+	}
+
+ 	card->initializing = 0;
+	return 0;
+
+out_iospace:
+	if (card->use_mmio) {
+		iounmap(card->ac97base_mmio);
+		iounmap(card->iobase_mmio);
+		release_mem_region(card->ac97base_mmio_phys, 512);
+		release_mem_region(card->iobase_mmio_phys, 256);
+	}
+out_pio:	
+	release_region(card->iobase, 64);
+out_region2:
+	release_region(card->ac97base, 256);
+out_region1:
+	pci_free_consistent(pci_dev, sizeof(struct i810_channel)*NR_HW_CH,
+	    card->channel, card->chandma);
+out_mem:
+	kfree(card);
+	return -ENODEV;
+}
+
+static void __devexit i810_remove(struct pci_dev *pci_dev)
+{
+	int i;
+	struct i810_card *card = pci_get_drvdata(pci_dev);
+	/* free hardware resources */
+	free_irq(card->irq, devs);
+	release_region(card->iobase, 64);
+	release_region(card->ac97base, 256);
+	pci_free_consistent(pci_dev, sizeof(struct i810_channel)*NR_HW_CH,
+			    card->channel, card->chandma);
+	if (card->use_mmio) {
+		iounmap(card->ac97base_mmio);
+		iounmap(card->iobase_mmio);
+		release_mem_region(card->ac97base_mmio_phys, 512);
+		release_mem_region(card->iobase_mmio_phys, 256);
+	}
+
+	/* unregister audio devices */
+	for (i = 0; i < NR_AC97; i++)
+		if (card->ac97_codec[i] != NULL) {
+			unregister_sound_mixer(card->ac97_codec[i]->dev_mixer);
+			ac97_release_codec(card->ac97_codec[i]);
+			card->ac97_codec[i] = NULL;
+		}
+	unregister_sound_dsp(card->dev_audio);
+	kfree(card);
+}
+
+#ifdef CONFIG_PM
+static int i810_pm_suspend(struct pci_dev *dev, pm_message_t pm_state)
+{
+        struct i810_card *card = pci_get_drvdata(dev);
+        struct i810_state *state;
+	unsigned long flags;
+	struct dmabuf *dmabuf;
+	int i,num_ac97;
+#ifdef DEBUG
+	printk("i810_audio: i810_pm_suspend called\n");
+#endif
+	if(!card) return 0;
+	spin_lock_irqsave(&card->lock, flags);
+	card->pm_suspended=1;
+	for(i=0;i<NR_HW_CH;i++) {
+		state = card->states[i];
+		if(!state) continue;
+		/* this happens only if there are open files */
+		dmabuf = &state->dmabuf;
+		if(dmabuf->enable & DAC_RUNNING ||
+		   (dmabuf->count && (dmabuf->trigger & PCM_ENABLE_OUTPUT))) {
+			state->pm_saved_dac_rate=dmabuf->rate;
+			stop_dac(state);
+		} else {
+			state->pm_saved_dac_rate=0;
+		}
+		if(dmabuf->enable & ADC_RUNNING) {
+			state->pm_saved_adc_rate=dmabuf->rate;	
+			stop_adc(state);
+		} else {
+			state->pm_saved_adc_rate=0;
+		}
+		dmabuf->ready = 0;
+		dmabuf->swptr = dmabuf->hwptr = 0;
+		dmabuf->count = dmabuf->total_bytes = 0;
+	}
+
+	spin_unlock_irqrestore(&card->lock, flags);
+
+	/* save mixer settings */
+	for (num_ac97 = 0; num_ac97 < NR_AC97; num_ac97++) {
+		struct ac97_codec *codec = card->ac97_codec[num_ac97];
+		if(!codec) continue;
+		for(i=0;i< SOUND_MIXER_NRDEVICES ;i++) {
+			if((supported_mixer(codec,i)) &&
+			   (codec->read_mixer)) {
+				card->pm_saved_mixer_settings[i][num_ac97]=
+					codec->read_mixer(codec,i);
+			}
+		}
+	}
+	pci_save_state(dev); /* XXX do we need this? */
+	pci_disable_device(dev); /* disable busmastering */
+	pci_set_power_state(dev,3); /* Zzz. */
+
+	return 0;
+}
+
+
+static int i810_pm_resume(struct pci_dev *dev)
+{
+	int num_ac97,i=0;
+	struct i810_card *card=pci_get_drvdata(dev);
+	pci_enable_device(dev);
+	pci_restore_state (dev);
+
+	/* observation of a toshiba portege 3440ct suggests that the 
+	   hardware has to be more or less completely reinitialized from
+	   scratch after an apm suspend.  Works For Me.   -dan */
+
+	i810_ac97_power_up_bus(card);
+
+	for (num_ac97 = 0; num_ac97 < NR_AC97; num_ac97++) {
+		struct ac97_codec *codec = card->ac97_codec[num_ac97];
+		/* check they haven't stolen the hardware while we were
+		   away */
+		if(!codec || !i810_ac97_exists(card,num_ac97)) {
+			if(num_ac97) continue;
+			else BUG();
+		}
+		if(!i810_ac97_probe_and_powerup(card,codec)) BUG();
+		
+		if((card->ac97_features&0x0001)) {
+			/* at probe time we found we could do variable
+			   rates, but APM suspend has made it forget
+			   its magical powers */
+			if(!i810_ac97_enable_variable_rate(codec)) BUG();
+		}
+		/* we lost our mixer settings, so restore them */
+		for(i=0;i< SOUND_MIXER_NRDEVICES ;i++) {
+			if(supported_mixer(codec,i)){
+				int val=card->
+					pm_saved_mixer_settings[i][num_ac97];
+				codec->mixer_state[i]=val;
+				codec->write_mixer(codec,i,
+						   (val  & 0xff) ,
+						   ((val >> 8)  & 0xff) );
+			}
+		}
+	}
+
+	/* we need to restore the sample rate from whatever it was */
+	for(i=0;i<NR_HW_CH;i++) {
+		struct i810_state * state=card->states[i];
+		if(state) {
+			if(state->pm_saved_adc_rate)
+				i810_set_adc_rate(state,state->pm_saved_adc_rate);
+			if(state->pm_saved_dac_rate)
+				i810_set_dac_rate(state,state->pm_saved_dac_rate);
+		}
+	}
+
+	
+        card->pm_suspended = 0;
+
+	/* any processes that were reading/writing during the suspend
+	   probably ended up here */
+	for(i=0;i<NR_HW_CH;i++) {
+		struct i810_state *state = card->states[i];
+		if(state) wake_up(&state->dmabuf.wait);
+        }
+
+	return 0;
+}	
+#endif /* CONFIG_PM */
+
+MODULE_AUTHOR("The Linux kernel team");
+MODULE_DESCRIPTION("Intel 810 audio support");
+MODULE_LICENSE("GPL");
+module_param(ftsodell, int, 0444);
+module_param(clocking, uint, 0444);
+module_param(strict_clocking, int, 0444);
+module_param(spdif_locked, int, 0444);
+
+#define I810_MODULE_NAME "i810_audio"
+
+static struct pci_driver i810_pci_driver = {
+	.name		= I810_MODULE_NAME,
+	.id_table	= i810_pci_tbl,
+	.probe		= i810_probe,
+	.remove		= __devexit_p(i810_remove),
+#ifdef CONFIG_PM
+	.suspend	= i810_pm_suspend,
+	.resume		= i810_pm_resume,
+#endif /* CONFIG_PM */
+};
+
+
+static int __init i810_init_module (void)
+{
+	int retval;
+
+	printk(KERN_INFO "Intel 810 + AC97 Audio, version "
+	       DRIVER_VERSION ", " __TIME__ " " __DATE__ "\n");
+
+	retval = pci_register_driver(&i810_pci_driver);
+	if (retval)
+		return retval;
+
+	if(ftsodell != 0) {
+		printk("i810_audio: ftsodell is now a deprecated option.\n");
+	}
+	if(spdif_locked > 0 ) {
+		if(spdif_locked == 32000 || spdif_locked == 44100 || spdif_locked == 48000) {
+			printk("i810_audio: Enabling S/PDIF at sample rate %dHz.\n", spdif_locked);
+		} else {
+			printk("i810_audio: S/PDIF can only be locked to 32000, 44100, or 48000Hz.\n");
+			spdif_locked = 0;
+		}
+	}
+	
+	return 0;
+}
+
+static void __exit i810_cleanup_module (void)
+{
+	pci_unregister_driver(&i810_pci_driver);
+}
+
+module_init(i810_init_module);
+module_exit(i810_cleanup_module);
+
+/*
+Local Variables:
+c-basic-offset: 8
+End:
+*/