205 lines
7.8 KiB
C
205 lines
7.8 KiB
C
/*
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* ac97.h
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*
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* definitions for the AC97, Intel's Audio Codec 97 Spec
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* also includes support for a generic AC97 interface
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*/
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#ifndef _AC97_H_
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#define _AC97_H_
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#include "sound_config.h"
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#include "sound_calls.h"
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#define AC97_RESET 0x0000 //
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#define AC97_MASTER_VOL_STEREO 0x0002 // Line Out
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#define AC97_HEADPHONE_VOL 0x0004 //
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#define AC97_MASTER_VOL_MONO 0x0006 // TAD Output
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#define AC97_MASTER_TONE 0x0008 //
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#define AC97_PCBEEP_VOL 0x000a // none
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#define AC97_PHONE_VOL 0x000c // TAD Input (mono)
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#define AC97_MIC_VOL 0x000e // MIC Input (mono)
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#define AC97_LINEIN_VOL 0x0010 // Line Input (stereo)
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#define AC97_CD_VOL 0x0012 // CD Input (stereo)
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#define AC97_VIDEO_VOL 0x0014 // none
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#define AC97_AUX_VOL 0x0016 // Aux Input (stereo)
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#define AC97_PCMOUT_VOL 0x0018 // Wave Output (stereo)
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#define AC97_RECORD_SELECT 0x001a //
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#define AC97_RECORD_GAIN 0x001c
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#define AC97_RECORD_GAIN_MIC 0x001e
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#define AC97_GENERAL_PURPOSE 0x0020
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#define AC97_3D_CONTROL 0x0022
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#define AC97_MODEM_RATE 0x0024
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#define AC97_POWER_CONTROL 0x0026
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/* registers 0x0028 - 0x0058 are reserved */
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/* AC'97 2.0 */
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#define AC97_EXTENDED_ID 0x0028 /* Extended Audio ID */
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#define AC97_EXTENDED_STATUS 0x002A /* Extended Audio Status */
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#define AC97_PCM_FRONT_DAC_RATE 0x002C /* PCM Front DAC Rate */
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#define AC97_PCM_SURR_DAC_RATE 0x002E /* PCM Surround DAC Rate */
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#define AC97_PCM_LFE_DAC_RATE 0x0030 /* PCM LFE DAC Rate */
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#define AC97_PCM_LR_ADC_RATE 0x0032 /* PCM LR DAC Rate */
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#define AC97_PCM_MIC_ADC_RATE 0x0034 /* PCM MIC ADC Rate */
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#define AC97_CENTER_LFE_MASTER 0x0036 /* Center + LFE Master Volume */
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#define AC97_SURROUND_MASTER 0x0038 /* Surround (Rear) Master Volume */
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#define AC97_RESERVED_3A 0x003A /* Reserved */
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/* range 0x3c-0x58 - MODEM */
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/* registers 0x005a - 0x007a are vendor reserved */
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#define AC97_VENDOR_ID1 0x007c
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#define AC97_VENDOR_ID2 0x007e
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/* volume control bit defines */
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#define AC97_MUTE 0x8000
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#define AC97_MICBOOST 0x0040
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#define AC97_LEFTVOL 0x3f00
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#define AC97_RIGHTVOL 0x003f
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/* record mux defines */
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#define AC97_RECMUX_MIC 0x0000
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#define AC97_RECMUX_CD 0x0101
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#define AC97_RECMUX_VIDEO 0x0202 /* not used */
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#define AC97_RECMUX_AUX 0x0303
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#define AC97_RECMUX_LINE 0x0404
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#define AC97_RECMUX_STEREO_MIX 0x0505
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#define AC97_RECMUX_MONO_MIX 0x0606
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#define AC97_RECMUX_PHONE 0x0707
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/* general purpose register bit defines */
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#define AC97_GP_LPBK 0x0080 /* Loopback mode */
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#define AC97_GP_MS 0x0100 /* Mic Select 0=Mic1, 1=Mic2 */
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#define AC97_GP_MIX 0x0200 /* Mono output select 0=Mix, 1=Mic */
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#define AC97_GP_RLBK 0x0400 /* Remote Loopback - Modem line codec */
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#define AC97_GP_LLBK 0x0800 /* Local Loopback - Modem Line codec */
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#define AC97_GP_LD 0x1000 /* Loudness 1=on */
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#define AC97_GP_3D 0x2000 /* 3D Enhancement 1=on */
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#define AC97_GP_ST 0x4000 /* Stereo Enhancement 1=on */
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#define AC97_GP_POP 0x8000 /* Pcm Out Path, 0=pre 3D, 1=post 3D */
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/* powerdown control and status bit defines */
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/* status */
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#define AC97_PWR_MDM 0x0010 /* Modem section ready */
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#define AC97_PWR_REF 0x0008 /* Vref nominal */
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#define AC97_PWR_ANL 0x0004 /* Analog section ready */
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#define AC97_PWR_DAC 0x0002 /* DAC section ready */
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#define AC97_PWR_ADC 0x0001 /* ADC section ready */
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/* control */
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#define AC97_PWR_PR0 0x0100 /* ADC and Mux powerdown */
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#define AC97_PWR_PR1 0x0200 /* DAC powerdown */
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#define AC97_PWR_PR2 0x0400 /* Output mixer powerdown (Vref on) */
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#define AC97_PWR_PR3 0x0800 /* Output mixer powerdown (Vref off) */
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#define AC97_PWR_PR4 0x1000 /* AC-link powerdown */
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#define AC97_PWR_PR5 0x2000 /* Internal Clk disable */
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#define AC97_PWR_PR6 0x4000 /* HP amp powerdown */
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#define AC97_PWR_PR7 0x8000 /* Modem off - if supported */
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/* useful power states */
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#define AC97_PWR_D0 0x0000 /* everything on */
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#define AC97_PWR_D1 AC97_PWR_PR0|AC97_PWR_PR1|AC97_PWR_PR4
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#define AC97_PWR_D2 AC97_PWR_PR0|AC97_PWR_PR1|AC97_PWR_PR2|AC97_PWR_PR3|AC97_PWR_PR4
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#define AC97_PWR_D3 AC97_PWR_PR0|AC97_PWR_PR1|AC97_PWR_PR2|AC97_PWR_PR3|AC97_PWR_PR4
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#define AC97_PWR_ANLOFF AC97_PWR_PR2|AC97_PWR_PR3 /* analog section off */
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/* Total number of defined registers. */
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#define AC97_REG_CNT 64
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/* Generic AC97 mixer interface. */
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/* Structure describing access to the hardware. */
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struct ac97_hwint
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{
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/* Perform any hardware-specific reset and initialization. Returns
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0 on success, or a negative error code. */
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int (*reset_device) (struct ac97_hwint *dev);
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/* Returns the contents of the specified register REG. The caller
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should check to see if the desired contents are available in
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the cache first, if applicable. Returns a positive unsigned value
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representing the contents of the register, or a negative error
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code. */
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int (*read_reg) (struct ac97_hwint *dev, u8 reg);
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/* Writes VALUE to register REG. Returns 0 on success, or a
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negative error code. */
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int (*write_reg) (struct ac97_hwint *dev, u8 reg, u16 value);
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/* Hardware-specific information. */
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void *driver_private;
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/* Three OSS masks. */
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int mixer_devmask;
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int mixer_stereomask;
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int mixer_recmask;
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/* The mixer cache. The indices correspond to the AC97 hardware register
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number / 2, since the register numbers are always an even number.
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Unknown values are set to -1; unsupported registers contain a
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-2. */
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int last_written_mixer_values[AC97_REG_CNT];
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/* A cache of values written via OSS; we need these so we can return
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the values originally written by the user.
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Why the original user values? Because the real-world hardware
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has less precision, and some existing applications assume that
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they will get back the exact value that they wrote (aumix).
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A -1 value indicates that no value has been written to this mixer
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channel via OSS. */
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int last_written_OSS_values[SOUND_MIXER_NRDEVICES];
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};
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/* Values stored in the register cache. */
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#define AC97_REGVAL_UNKNOWN -1
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#define AC97_REG_UNSUPPORTED -2
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struct ac97_mixer_value_list
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{
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/* Mixer channel to set. List is terminated by a value of -1. */
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int oss_channel;
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/* The scaled value to set it to; values generally range from 0-100. */
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union {
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struct {
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u8 left, right;
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} stereo;
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u8 mono;
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} value;
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};
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/* Initialize the ac97 mixer by resetting it. */
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extern int ac97_init (struct ac97_hwint *dev);
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/* Sets the mixer DEV to the values in VALUE_LIST. Returns 0 on success,
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or a negative error code. */
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extern int ac97_set_values (struct ac97_hwint *dev,
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struct ac97_mixer_value_list *value_list);
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/* Writes the specified VALUE to the AC97 register REG in the mixer.
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Takes care of setting the last-written cache as well. */
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extern int ac97_put_register (struct ac97_hwint *dev, u8 reg, u16 value);
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/* Default ioctl. */
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extern int ac97_mixer_ioctl (struct ac97_hwint *dev, unsigned int cmd,
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void __user * arg);
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/* Do a complete reset on the AC97 mixer, restoring all mixer registers to
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the current values. Normally used after an APM resume event. */
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extern int ac97_reset (struct ac97_hwint *dev);
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#endif
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/*
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* Local variables:
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* c-basic-offset: 4
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* End:
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*/
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