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Diffstat (limited to 'sound/oss/ac97.h')
| -rw-r--r-- | sound/oss/ac97.h | 204 |
1 files changed, 204 insertions, 0 deletions
diff --git a/sound/oss/ac97.h b/sound/oss/ac97.h new file mode 100644 index 0000000..77d454e --- /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: + */ |
