1 files changed, 204 insertions, 0 deletions

diff --git a/sound/oss/ac97.h b/sound/oss/ac97.h
new file mode 100644
index 000000000000..77d454ea3202
--- /dev/null
+++ b/sound/oss/ac97.h
@@ -0,0 +1,204 @@
+/*
+ * ac97.h 
+ * 
+ * definitions for the AC97, Intel's Audio Codec 97 Spec
+ * also includes support for a generic AC97 interface
+ */
+
+#ifndef _AC97_H_
+#define _AC97_H_
+#include "sound_config.h"
+#include "sound_calls.h"
+
+#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
+
+/* registers 0x0028 - 0x0058 are reserved */
+
+/* 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 DAC 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 */
+/* range 0x3c-0x58 - MODEM */
+
+/* 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      /* not used */
+#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 */
+
+
+/* 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 */
+
+/* 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
+
+/* Generic AC97 mixer interface. */
+
+/* Structure describing access to the hardware. */
+struct ac97_hwint
+{
+    /* Perform any hardware-specific reset and initialization.  Returns
+     0 on success, or a negative error code.  */
+    int (*reset_device) (struct ac97_hwint *dev);
+
+    /* Returns the contents of the specified register REG.  The caller
+       should check to see if the desired contents are available in
+       the cache first, if applicable. Returns a positive unsigned value
+       representing the contents of the register, or a negative error
+       code.  */
+    int (*read_reg) (struct ac97_hwint *dev, u8 reg);
+
+    /* Writes VALUE to register REG.  Returns 0 on success, or a
+       negative error code.  */
+    int (*write_reg) (struct ac97_hwint *dev, u8 reg, u16 value);
+
+    /* Hardware-specific information. */
+    void *driver_private;
+
+    /* Three OSS masks. */
+    int mixer_devmask;
+    int mixer_stereomask;
+    int mixer_recmask;
+
+    /* The mixer cache. The indices correspond to the AC97 hardware register
+       number / 2, since the register numbers are always an even number.
+
+       Unknown values are set to -1; unsupported registers contain a
+       -2.  */
+    int last_written_mixer_values[AC97_REG_CNT];
+
+    /* A cache of values written via OSS; we need these so we can return
+       the values originally written by the user.
+
+       Why the original user values?  Because the real-world hardware
+       has less precision, and some existing applications assume that
+       they will get back the exact value that they wrote (aumix).
+
+       A -1 value indicates that no value has been written to this mixer
+       channel via OSS.  */
+    int last_written_OSS_values[SOUND_MIXER_NRDEVICES];
+};
+
+/* Values stored in the register cache.  */
+#define AC97_REGVAL_UNKNOWN -1
+#define AC97_REG_UNSUPPORTED -2
+
+struct ac97_mixer_value_list
+{
+    /* Mixer channel to set.  List is terminated by a value of -1.  */
+    int oss_channel;
+    /* The scaled value to set it to; values generally range from 0-100. */
+    union {
+        struct {
+            u8 left, right;
+        } stereo;
+        u8 mono;
+    } value;
+};
+
+/* Initialize the ac97 mixer by resetting it.  */
+extern int ac97_init (struct ac97_hwint *dev);
+
+/* Sets the mixer DEV to the values in VALUE_LIST.  Returns 0 on success,
+   or a negative error code.  */
+extern int ac97_set_values (struct ac97_hwint *dev,
+                            struct ac97_mixer_value_list *value_list);
+
+/* Writes the specified VALUE to the AC97 register REG in the mixer.
+   Takes care of setting the last-written cache as well.  */
+extern int ac97_put_register (struct ac97_hwint *dev, u8 reg, u16 value);
+
+/* Default ioctl. */
+extern int ac97_mixer_ioctl (struct ac97_hwint *dev, unsigned int cmd,
+                             void __user * arg);
+
+/* Do a complete reset on the AC97 mixer, restoring all mixer registers to
+   the current values.  Normally used after an APM resume event.  */
+extern int ac97_reset (struct ac97_hwint *dev);
+#endif
+
+/*
+ * Local variables:
+ *  c-basic-offset: 4
+ * End:
+ */