diff --git a/include/linux/ac97_codec.h b/include/linux/ac97_codec.h
new file mode 100644
index 0000000..c358338
--- /dev/null
+++ b/include/linux/ac97_codec.h
@@ -0,0 +1,374 @@
+#ifndef _AC97_CODEC_H_
+#define _AC97_CODEC_H_
+
+#include <linux/types.h>
+#include <linux/soundcard.h>
+
+/* AC97 1.0 */
+#define  AC97_RESET               0x0000      //
+#define  AC97_MASTER_VOL_STEREO   0x0002      // Line Out
+#define  AC97_HEADPHONE_VOL       0x0004      // 
+#define  AC97_MASTER_VOL_MONO     0x0006      // TAD Output
+#define  AC97_MASTER_TONE         0x0008      //
+#define  AC97_PCBEEP_VOL          0x000a      // none
+#define  AC97_PHONE_VOL           0x000c      // TAD Input (mono)
+#define  AC97_MIC_VOL             0x000e      // MIC Input (mono)
+#define  AC97_LINEIN_VOL          0x0010      // Line Input (stereo)
+#define  AC97_CD_VOL              0x0012      // CD Input (stereo)
+#define  AC97_VIDEO_VOL           0x0014      // none
+#define  AC97_AUX_VOL             0x0016      // Aux Input (stereo)
+#define  AC97_PCMOUT_VOL          0x0018      // Wave Output (stereo)
+#define  AC97_RECORD_SELECT       0x001a      //
+#define  AC97_RECORD_GAIN         0x001c
+#define  AC97_RECORD_GAIN_MIC     0x001e
+#define  AC97_GENERAL_PURPOSE     0x0020
+#define  AC97_3D_CONTROL          0x0022
+#define  AC97_MODEM_RATE          0x0024
+#define  AC97_POWER_CONTROL       0x0026
+
+/* AC'97 2.0 */
+#define AC97_EXTENDED_ID          0x0028       /* Extended Audio ID */
+#define AC97_EXTENDED_STATUS      0x002A       /* Extended Audio Status */
+#define AC97_PCM_FRONT_DAC_RATE   0x002C       /* PCM Front DAC Rate */
+#define AC97_PCM_SURR_DAC_RATE    0x002E       /* PCM Surround DAC Rate */
+#define AC97_PCM_LFE_DAC_RATE     0x0030       /* PCM LFE DAC Rate */
+#define AC97_PCM_LR_ADC_RATE      0x0032       /* PCM LR ADC Rate */
+#define AC97_PCM_MIC_ADC_RATE     0x0034       /* PCM MIC ADC Rate */
+#define AC97_CENTER_LFE_MASTER    0x0036       /* Center + LFE Master Volume */
+#define AC97_SURROUND_MASTER      0x0038       /* Surround (Rear) Master Volume */
+#define AC97_RESERVED_3A          0x003A       /* Reserved in AC '97 < 2.2 */
+
+/* AC'97 2.2 */
+#define AC97_SPDIF_CONTROL        0x003A       /* S/PDIF Control */
+
+/* range 0x3c-0x58 - MODEM */
+#define AC97_EXTENDED_MODEM_ID    0x003C
+#define AC97_EXTEND_MODEM_STAT    0x003E
+#define AC97_LINE1_RATE           0x0040
+#define AC97_LINE2_RATE           0x0042
+#define AC97_HANDSET_RATE         0x0044
+#define AC97_LINE1_LEVEL          0x0046
+#define AC97_LINE2_LEVEL          0x0048
+#define AC97_HANDSET_LEVEL        0x004A
+#define AC97_GPIO_CONFIG          0x004C
+#define AC97_GPIO_POLARITY        0x004E
+#define AC97_GPIO_STICKY          0x0050
+#define AC97_GPIO_WAKE_UP         0x0052
+#define AC97_GPIO_STATUS          0x0054
+#define AC97_MISC_MODEM_STAT      0x0056
+#define AC97_RESERVED_58          0x0058
+
+/* registers 0x005a - 0x007a are vendor reserved */
+
+#define AC97_VENDOR_ID1           0x007c
+#define AC97_VENDOR_ID2           0x007e
+
+/* volume control bit defines */
+#define AC97_MUTE                 0x8000
+#define AC97_MICBOOST             0x0040
+#define AC97_LEFTVOL              0x3f00
+#define AC97_RIGHTVOL             0x003f
+
+/* record mux defines */
+#define AC97_RECMUX_MIC           0x0000
+#define AC97_RECMUX_CD            0x0101
+#define AC97_RECMUX_VIDEO         0x0202
+#define AC97_RECMUX_AUX           0x0303
+#define AC97_RECMUX_LINE          0x0404
+#define AC97_RECMUX_STEREO_MIX    0x0505
+#define AC97_RECMUX_MONO_MIX      0x0606
+#define AC97_RECMUX_PHONE         0x0707
+
+/* general purpose register bit defines */
+#define AC97_GP_LPBK              0x0080       /* Loopback mode */
+#define AC97_GP_MS                0x0100       /* Mic Select 0=Mic1, 1=Mic2 */
+#define AC97_GP_MIX               0x0200       /* Mono output select 0=Mix, 1=Mic */
+#define AC97_GP_RLBK              0x0400       /* Remote Loopback - Modem line codec */
+#define AC97_GP_LLBK              0x0800       /* Local Loopback - Modem Line codec */
+#define AC97_GP_LD                0x1000       /* Loudness 1=on */
+#define AC97_GP_3D                0x2000       /* 3D Enhancement 1=on */
+#define AC97_GP_ST                0x4000       /* Stereo Enhancement 1=on */
+#define AC97_GP_POP               0x8000       /* Pcm Out Path, 0=pre 3D, 1=post 3D */
+
+/* extended audio status and control bit defines */
+#define AC97_EA_VRA               0x0001       /* Variable bit rate enable bit */
+#define AC97_EA_DRA               0x0002       /* Double-rate audio enable bit */
+#define AC97_EA_SPDIF             0x0004       /* S/PDIF Enable bit */
+#define AC97_EA_VRM               0x0008       /* Variable bit rate for MIC enable bit */
+#define AC97_EA_CDAC              0x0040       /* PCM Center DAC is ready (Read only) */
+#define AC97_EA_SDAC              0x0040       /* PCM Surround DACs are ready (Read only) */
+#define AC97_EA_LDAC              0x0080       /* PCM LFE DAC is ready (Read only) */
+#define AC97_EA_MDAC              0x0100       /* MIC ADC is ready (Read only) */
+#define AC97_EA_SPCV              0x0400       /* S/PDIF configuration valid (Read only) */
+#define AC97_EA_PRI               0x0800       /* Turns the PCM Center DAC off */
+#define AC97_EA_PRJ               0x1000       /* Turns the PCM Surround DACs off */
+#define AC97_EA_PRK               0x2000       /* Turns the PCM LFE DAC off */
+#define AC97_EA_PRL               0x4000       /* Turns the MIC ADC off */
+#define AC97_EA_SLOT_MASK         0xffcf       /* Mask for slot assignment bits */
+#define AC97_EA_SPSA_3_4          0x0000       /* Slot assigned to 3 & 4 */
+#define AC97_EA_SPSA_7_8          0x0010       /* Slot assigned to 7 & 8 */
+#define AC97_EA_SPSA_6_9          0x0020       /* Slot assigned to 6 & 9 */
+#define AC97_EA_SPSA_10_11        0x0030       /* Slot assigned to 10 & 11 */
+
+/* S/PDIF control bit defines */
+#define AC97_SC_PRO               0x0001       /* Professional status */
+#define AC97_SC_NAUDIO            0x0002       /* Non audio stream */
+#define AC97_SC_COPY              0x0004       /* Copyright status */
+#define AC97_SC_PRE               0x0008       /* Preemphasis status */
+#define AC97_SC_CC_MASK           0x07f0       /* Category Code mask */
+#define AC97_SC_L                 0x0800       /* Generation Level status */
+#define AC97_SC_SPSR_MASK         0xcfff       /* S/PDIF Sample Rate bits */
+#define AC97_SC_SPSR_44K          0x0000       /* Use 44.1kHz Sample rate */
+#define AC97_SC_SPSR_48K          0x2000       /* Use 48kHz Sample rate */
+#define AC97_SC_SPSR_32K          0x3000       /* Use 32kHz Sample rate */
+#define AC97_SC_DRS               0x4000       /* Double Rate S/PDIF */
+#define AC97_SC_V                 0x8000       /* Validity status */
+
+/* powerdown control and status bit defines */
+
+/* status */
+#define AC97_PWR_MDM              0x0010       /* Modem section ready */
+#define AC97_PWR_REF              0x0008       /* Vref nominal */
+#define AC97_PWR_ANL              0x0004       /* Analog section ready */
+#define AC97_PWR_DAC              0x0002       /* DAC section ready */
+#define AC97_PWR_ADC              0x0001       /* ADC section ready */
+
+/* control */
+#define AC97_PWR_PR0              0x0100       /* ADC and Mux powerdown */
+#define AC97_PWR_PR1              0x0200       /* DAC powerdown */
+#define AC97_PWR_PR2              0x0400       /* Output mixer powerdown (Vref on) */
+#define AC97_PWR_PR3              0x0800       /* Output mixer powerdown (Vref off) */
+#define AC97_PWR_PR4              0x1000       /* AC-link powerdown */
+#define AC97_PWR_PR5              0x2000       /* Internal Clk disable */
+#define AC97_PWR_PR6              0x4000       /* HP amp powerdown */
+#define AC97_PWR_PR7              0x8000       /* Modem off - if supported */
+
+/* extended audio ID register bit defines */
+#define AC97_EXTID_VRA            0x0001
+#define AC97_EXTID_DRA            0x0002
+#define AC97_EXTID_SPDIF          0x0004
+#define AC97_EXTID_VRM            0x0008
+#define AC97_EXTID_DSA0           0x0010
+#define AC97_EXTID_DSA1           0x0020
+#define AC97_EXTID_CDAC           0x0040
+#define AC97_EXTID_SDAC           0x0080
+#define AC97_EXTID_LDAC           0x0100
+#define AC97_EXTID_AMAP           0x0200
+#define AC97_EXTID_REV0           0x0400
+#define AC97_EXTID_REV1           0x0800
+#define AC97_EXTID_ID0            0x4000
+#define AC97_EXTID_ID1            0x8000
+
+/* extended status register bit defines */
+#define AC97_EXTSTAT_VRA          0x0001
+#define AC97_EXTSTAT_DRA          0x0002
+#define AC97_EXTSTAT_SPDIF        0x0004
+#define AC97_EXTSTAT_VRM          0x0008
+#define AC97_EXTSTAT_SPSA0        0x0010
+#define AC97_EXTSTAT_SPSA1        0x0020
+#define AC97_EXTSTAT_CDAC         0x0040
+#define AC97_EXTSTAT_SDAC         0x0080
+#define AC97_EXTSTAT_LDAC         0x0100
+#define AC97_EXTSTAT_MADC         0x0200
+#define AC97_EXTSTAT_SPCV         0x0400
+#define AC97_EXTSTAT_PRI          0x0800
+#define AC97_EXTSTAT_PRJ          0x1000
+#define AC97_EXTSTAT_PRK          0x2000
+#define AC97_EXTSTAT_PRL          0x4000
+
+/* extended audio ID register bit defines */
+#define AC97_EXTID_VRA            0x0001
+#define AC97_EXTID_DRA            0x0002
+#define AC97_EXTID_SPDIF          0x0004
+#define AC97_EXTID_VRM            0x0008
+#define AC97_EXTID_DSA0           0x0010
+#define AC97_EXTID_DSA1           0x0020
+#define AC97_EXTID_CDAC           0x0040
+#define AC97_EXTID_SDAC           0x0080
+#define AC97_EXTID_LDAC           0x0100
+#define AC97_EXTID_AMAP           0x0200
+#define AC97_EXTID_REV0           0x0400
+#define AC97_EXTID_REV1           0x0800
+#define AC97_EXTID_ID0            0x4000
+#define AC97_EXTID_ID1            0x8000
+
+/* extended status register bit defines */
+#define AC97_EXTSTAT_VRA          0x0001
+#define AC97_EXTSTAT_DRA          0x0002
+#define AC97_EXTSTAT_SPDIF        0x0004
+#define AC97_EXTSTAT_VRM          0x0008
+#define AC97_EXTSTAT_SPSA0        0x0010
+#define AC97_EXTSTAT_SPSA1        0x0020
+#define AC97_EXTSTAT_CDAC         0x0040
+#define AC97_EXTSTAT_SDAC         0x0080
+#define AC97_EXTSTAT_LDAC         0x0100
+#define AC97_EXTSTAT_MADC         0x0200
+#define AC97_EXTSTAT_SPCV         0x0400
+#define AC97_EXTSTAT_PRI          0x0800
+#define AC97_EXTSTAT_PRJ          0x1000
+#define AC97_EXTSTAT_PRK          0x2000
+#define AC97_EXTSTAT_PRL          0x4000
+
+/* useful power states */
+#define AC97_PWR_D0               0x0000      /* everything on */
+#define AC97_PWR_D1              AC97_PWR_PR0|AC97_PWR_PR1|AC97_PWR_PR4
+#define AC97_PWR_D2              AC97_PWR_PR0|AC97_PWR_PR1|AC97_PWR_PR2|AC97_PWR_PR3|AC97_PWR_PR4
+#define AC97_PWR_D3              AC97_PWR_PR0|AC97_PWR_PR1|AC97_PWR_PR2|AC97_PWR_PR3|AC97_PWR_PR4
+#define AC97_PWR_ANLOFF          AC97_PWR_PR2|AC97_PWR_PR3  /* analog section off */
+
+/* Total number of defined registers.  */
+#define AC97_REG_CNT 64
+
+
+/* OSS interface to the ac97s.. */
+#define AC97_STEREO_MASK (SOUND_MASK_VOLUME|SOUND_MASK_PCM|\
+	SOUND_MASK_LINE|SOUND_MASK_CD|\
+	SOUND_MASK_ALTPCM|SOUND_MASK_IGAIN|\
+	SOUND_MASK_LINE1|SOUND_MASK_VIDEO)
+
+#define AC97_SUPPORTED_MASK (AC97_STEREO_MASK | \
+	SOUND_MASK_BASS|SOUND_MASK_TREBLE|\
+	SOUND_MASK_SPEAKER|SOUND_MASK_MIC|\
+	SOUND_MASK_PHONEIN|SOUND_MASK_PHONEOUT)
+
+#define AC97_RECORD_MASK (SOUND_MASK_MIC|\
+	SOUND_MASK_CD|SOUND_MASK_IGAIN|SOUND_MASK_VIDEO|\
+	SOUND_MASK_LINE1| SOUND_MASK_LINE|\
+	SOUND_MASK_PHONEIN)
+
+/* original check is not good enough in case FOO is greater than
+ * SOUND_MIXER_NRDEVICES because the supported_mixers has exactly
+ * SOUND_MIXER_NRDEVICES elements.
+ * before matching the given mixer against the bitmask in supported_mixers we
+ * check if mixer number exceeds maximum allowed size which is as mentioned
+ * above SOUND_MIXER_NRDEVICES */
+#define supported_mixer(CODEC,FOO) ((FOO >= 0) && \
+                                    (FOO < SOUND_MIXER_NRDEVICES) && \
+                                    (CODEC)->supported_mixers & (1<<FOO) )
+
+struct ac97_codec {
+	/* Linked list of codecs */
+	struct list_head list;
+
+	/* AC97 controller connected with */
+	void *private_data;
+
+	char *name;
+	int id;
+	int dev_mixer; 
+	int type;
+	u32 model;
+
+	int modem:1;
+
+	struct ac97_ops *codec_ops;
+
+	/* controller specific lower leverl ac97 accessing routines.
+	   must be re-entrant safe */
+	u16  (*codec_read)  (struct ac97_codec *codec, u8 reg);
+	void (*codec_write) (struct ac97_codec *codec, u8 reg, u16 val);
+
+	/* Wait for codec-ready.  Ok to sleep here.  */
+	void  (*codec_wait)  (struct ac97_codec *codec);
+
+	/* callback used by helper drivers for interesting ac97 setups */
+	void  (*codec_unregister) (struct ac97_codec *codec);
+	
+	struct ac97_driver *driver;
+	void *driver_private;	/* Private data for the driver */
+	
+	spinlock_t lock;
+	
+	/* OSS mixer masks */
+	int modcnt;
+	int supported_mixers;
+	int stereo_mixers;
+	int record_sources;
+
+	/* Property flags */
+	int flags;
+
+	int bit_resolution;
+
+	/* OSS mixer interface */
+	int  (*read_mixer) (struct ac97_codec *codec, int oss_channel);
+	void (*write_mixer)(struct ac97_codec *codec, int oss_channel,
+			    unsigned int left, unsigned int right);
+	int  (*recmask_io) (struct ac97_codec *codec, int rw, int mask);
+	int  (*mixer_ioctl)(struct ac97_codec *codec, unsigned int cmd, unsigned long arg);
+
+	/* saved OSS mixer states */
+	unsigned int mixer_state[SOUND_MIXER_NRDEVICES];
+
+	/* Software Modem interface */
+	int  (*modem_ioctl)(struct ac97_codec *codec, unsigned int cmd, unsigned long arg);
+};
+
+/*
+ *	Operation structures for each known AC97 chip
+ */
+ 
+struct ac97_ops
+{
+	/* Initialise */
+	int (*init)(struct ac97_codec *c);
+	/* Amplifier control */
+	int (*amplifier)(struct ac97_codec *codec, int on);
+	/* Digital mode control */
+	int (*digital)(struct ac97_codec *codec, int slots, int rate, int mode);
+#define AUDIO_DIGITAL		0x8000
+#define AUDIO_PRO		0x4000
+#define AUDIO_DRS		0x2000
+#define AUDIO_CCMASK		0x003F
+	
+#define AC97_DELUDED_MODEM	1	/* Audio codec reports its a modem */
+#define AC97_NO_PCM_VOLUME	2	/* Volume control is missing 	   */
+#define AC97_DEFAULT_POWER_OFF 4 /* Needs warm reset to power up */
+};
+
+extern int ac97_read_proc (char *page_out, char **start, off_t off,
+			   int count, int *eof, void *data);
+extern int ac97_probe_codec(struct ac97_codec *);
+extern unsigned int ac97_set_adc_rate(struct ac97_codec *codec, unsigned int rate);
+extern unsigned int ac97_set_dac_rate(struct ac97_codec *codec, unsigned int rate);
+extern int ac97_save_state(struct ac97_codec *codec);
+extern int ac97_restore_state(struct ac97_codec *codec);
+
+extern struct ac97_codec *ac97_alloc_codec(void);
+extern void ac97_release_codec(struct ac97_codec *codec);
+
+struct ac97_driver {
+	struct list_head list;
+	char *name;
+	u32 codec_id;
+	u32 codec_mask;
+	int (*probe) (struct ac97_codec *codec, struct ac97_driver *driver);
+	void (*remove) (struct ac97_codec *codec, struct ac97_driver *driver);
+};
+
+extern int ac97_register_driver(struct ac97_driver *driver);
+extern void ac97_unregister_driver(struct ac97_driver *driver);
+
+/* quirk types */
+enum {
+	AC97_TUNE_DEFAULT = -1, /* use default from quirk list (not valid in list) */
+	AC97_TUNE_NONE = 0,     /* nothing extra to do */
+	AC97_TUNE_HP_ONLY,      /* headphone (true line-out) control as master only */
+	AC97_TUNE_SWAP_HP,      /* swap headphone and master controls */
+	AC97_TUNE_SWAP_SURROUND, /* swap master and surround controls */
+	AC97_TUNE_AD_SHARING,   /* for AD1985, turn on OMS bit and use headphone */
+	AC97_TUNE_ALC_JACK,     /* for Realtek, enable JACK detection */
+};
+
+struct ac97_quirk {
+	unsigned short vendor;  /* PCI vendor id */
+	unsigned short device;  /* PCI device id */
+	unsigned short mask;    /* device id bit mask, 0 = accept all */
+	const char *name;       /* name shown as info */
+	int type;               /* quirk type above */
+};
+
+struct pci_dev;
+extern int ac97_tune_hardware(struct pci_dev *pdev, struct ac97_quirk *quirk, int override);
+
+#endif /* _AC97_CODEC_H_ */