kolibrios-fun/programs/ac97wav/trunk/ac97.inc
Andrey Halyavin (halyavin) 065b8d32b2 programs sources added
git-svn-id: svn://kolibrios.org@31 a494cfbc-eb01-0410-851d-a64ba20cac60
2006-01-03 09:43:31 +00:00

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PHP

; Vendor ids
INTEL_VID = 0x8086
SIS_VID = 0x1039
NVIDIA_VID = 0x10DE
AMD_VID = 0x1022
; Device ids
ICH_DID = 0x2415
ICH0_DID = 0x2425
ICH2_DID = 0x2445
ICH3_DID = 0x2485
ICH4_DID = 0x24C5
ICH5_DID = 0x24D5
MX440_DID = 0x7195
SI7012_DID = 0x7012
NFORCE_DID = 0x01B1
NFORCE2_DID = 0x006A
AMD8111_DID = 0x764D
AMD768_DID = 0x7445
NAMBAR_REG = 0x10 ; native audio mixer BAR
NAM_SIZE = 256 ; 256 bytes required.
NABMBAR_REG = 0x14 ; native audio bus mastering BAR
NABM_SIZE = 64 ; 64 bytes
IRQ_REG = 0x3c ; IRQ holder for PCI
INT_REG = 0x3d ; INT pin
ICH4_CFG_REG = 0x41 ; ICH4 config register
; BUS master registers, accessed via NABMBAR+offset
; ICH supports 3 different types of register sets for three types of things
; it can do, thus:
;
; PCM in (for recording) aka PI
; PCM out (for playback) aka PO
; MIC in (for recording) aka MC
PI_BDBAR_REG = 0 ; PCM in buffer descriptor BAR
PO_BDBAR_REG = 10h ; PCM out buffer descriptor BAR
MC_BDBAR_REG = 20h ; MIC in buffer descriptor BAR
; each buffer descriptor BAR holds a pointer which has entries to the buffer
; contents of the .WAV file we're going to play. Each entry is 8 bytes long
; (more on that later) and can contain 32 entries total, so each BAR is
; 256 bytes in length, thus:
BDL_SIZE = 32*8 ; Buffer Descriptor List size
INDEX_MASK = 31 ; indexes must be 0-31
PI_CIV_REG = 4 ; PCM in current Index value (RO)
PO_CIV_REG = 14h ; PCM out current Index value (RO)
MC_CIV_REG = 24h ; MIC in current Index value (RO)
;8bit read only
; each current index value is simply a pointer showing us which buffer
; (0-31) the codec is currently processing. Once this counter hits 31, it
; wraps back to 0.
; this can be handy to know, as once it hits 31, we're almost out of data to
; play back or room to record!
PI_LVI_REG = 5 ; PCM in Last Valid Index
PO_LVI_REG = 15h ; PCM out Last Valid Index
MC_LVI_REG = 25h ; MIC in Last Valid Index
;8bit read/write
; The Last Valid Index is a number (0-31) to let the codec know what buffer
; number to stop on after processing. It could be very nasty to play audio
; from buffers that aren't filled with the audio we want to play.
PI_SR_REG = 6 ; PCM in Status register
PO_SR_REG = 16h ; PCM out Status register
MC_SR_REG = 26h ; MIC in Status register
;16bit read/write
; status registers. Bitfields follow:
FIFO_ERR = BIT4 ; FIFO Over/Underrun W1TC.
BCIS = BIT3 ; buffer completion interrupt status.
; Set whenever the last sample in ANY
; buffer is finished. Bit is only
; set when the Interrupt on Complete
; (BIT4 of control reg) is set.
LVBCI = BIT2 ; Set whenever the codec has processed
; the last buffer in the buffer list.
; Will fire an interrupt if IOC bit is
; set. Probably set after the last
; sample in the last buffer is
; processed. W1TC
CELV = BIT1 ; Current buffer == last valid.
; Bit is RO and remains set until LVI is
; cleared. Probably set up the start
; of processing for the last buffer.
DCH = BIT0 ; DMA controller halted.
; set whenever audio stream is stopped
; or something else goes wrong.
PI_PICB_REG = 8 ; PCM in position in current buffer(RO)
PO_PICB_REG = 18h ; PCM out position in current buffer(RO)
MC_PICB_REG = 28h ; MIC in position in current buffer (RO)
;16bit read only
; position in current buffer regs show the number of dwords left to be
; processed in the current buffer.
;
PI_PIV_REG = 0ah ; PCM in Prefected index value
PO_PIV_REG = 1ah ; PCM out Prefected index value
MC_PIV_REG = 2ah ; MIC in Prefected index value
;8bit, read only
; Prefetched index value register.
; tells which buffer number (0-31) has be prefetched. I'd imagine this
; value follows the current index value fairly closely. (CIV+1)
;
PI_CR_REG = 0bh ; PCM in Control Register
PO_CR_REG = 1bh ; PCM out Control Register
MC_CR_REG = 2bh ; MIC in Control Register
; 8bit
; Control register *MUST* only be accessed as an 8bit value.
; Control register. See bitfields below.
;
IOCE = BIT4 ; interrupt on complete enable.
; set this bit if you want an intrtpt
; to fire whenever LVBCI is set.
FEIFE = BIT3 ; set if you want an interrupt to fire
; whenever there is a FIFO (over or
; under) error.
LVBIE = BIT2 ; last valid buffer interrupt enable.
; set if you want an interrupt to fire
; whenever the completion of the last
; valid buffer.
RR = BIT1 ; reset registers. Nukes all regs
; except bits 4:2 of this register.
; Only set this bit if BIT 0 is 0
RPBM = BIT0 ; Run/Pause
; set this bit to start the codec!
GLOB_CNT_REG = 2ch ; Global control register
SEC_RES_EN = BIT5 ; secondary codec resume event
; interrupt enable. Not used here.
PRI_RES_EN = BIT4 ; ditto for primary. Not used here.
ACLINK_OFF = BIT3 ; Turn off the AC97 link
ACWARM_RESET = BIT2 ; Awaken the AC97 link from sleep.
; registers preserved, bit self clears
ACCOLD_RESET = BIT1 ; Reset everything in the AC97 and
; reset all registers. Not self clearin
;g
GPIIE = BIT0 ; GPI Interrupt enable.
; set if you want an interrupt to
; fire upon ANY of the bits in the
; GPI (general pursose inputs?) not used
;.
GLOB_STS_REG = 30h ; Global Status register (RO)
MD3 = BIT17 ; modem powerdown status (yawn)
AD3 = BIT16 ; Audio powerdown status (yawn)
RD_COMPLETE_STS = BIT15 ; Codec read timed out. 0=normal
BIT3SLOT12 = BIT14 ; shadowed status of bit 3 in slot 12
BIT2SLOT12 = BIT13 ; shadowed status of bit 2 in slot 12
BIT1SLOT12 = BIT12 ; shadowed status of bit 1 in slot 12
SEC_RESUME_STS = BIT11 ; secondary codec has resumed (and irqed)
PRI_RESUME_STS = BIT10 ; primary codec has resumed (and irqed)
SEC_CODEC_RDY = BIT9 ; secondary codec is ready for action
PRI_CODEC_RDY = BIT8 ; Primary codec is ready for action
; software must check these bits before
; starting the codec!
MIC_IN_IRQ = BIT7 ; MIC in caused an interrupt
PCM_OUT_IRQ = BIT6 ; One of the PCM out channels IRQed
PCM_IN_IRQ = BIT5 ; One of the PCM in channels IRQed
MODEM_OUT_IRQ = BIT2 ; modem out channel IRQed
MODEM_IN_IRQ = BIT1 ; modem in channel IRQed
GPI_STS_CHANGE = BIT0 ; set whenever GPI's have changed.
; BIT0 of slot 12 also reflects this.
ACC_SEMA_REG = 34h ; Codec write semiphore register
CODEC_BUSY = BIT0 ; codec register I/O is happening
; self clearing
;
; Buffer Descriptors List
; As stated earlier, each buffer descriptor list is a set of (up to) 32
; descriptors, each 8 bytes in length. Bytes 0-3 of a descriptor entry point
; to a chunk of memory to either play from or record to. Bytes 4-7 of an
; entry describe various control things detailed below.
;
; Buffer pointers must always be aligned on a Dword boundry.
;
;
IOC = BIT31 ; Fire an interrupt whenever this
; buffer is complete.
BUP = BIT30 ; Buffer Underrun Policy.
; if this buffer is the last buffer
; in a playback, fill the remaining
; samples with 0 (silence) or not.
; It's a good idea to set this to 1
; for the last buffer in playback,
; otherwise you're likely to get a lot
; of noise at the end of the sound.
;
; Bits 15:0 contain the length of the buffer, in number of samples, which
; are 16 bits each, coupled in left and right pairs, or 32bits each.
; Luckily for us, that's the same format as .wav files.
;
; A value of FFFF is 65536 samples. Running at 44.1Khz, that's just about
; 1.5 seconds of sample time. FFFF * 32bits is 1FFFFh bytes or 128k of data.
;
; A value of 0 in these bits means play no samples.
;
;*****************************************************************************
;* AC97 Codec registers include (based on Jeff Leyda AC97 wav player SDK :-)
;*****************************************************************************
; Not all codecs are created =al. Refer to the spec for your specific codec.
; All registers are 16bits wide. Access to codec registers over the AC97 link
; is defined by the OEM.
; Secondary codec's are accessed by ORing in BIT7 of all register accesses.
; each codec/mixer register is 16bits
CODEC_RESET_REG = 00 ; reset codec
CODEC_MASTER_VOL_REG = 02 ; master volume
CODEC_HP_VOL_REG = 04 ; headphone volume
CODEC_MASTER_MONO_VOL_REG = 06 ; master mono volume
CODEC_MASTER_TONE_REG = 08 ; master tone (R+L)
CODEC_PCBEEP_VOL_REG = 0ah ; PC beep volume
CODEC_PHONE_VOL_REG = 0ch ; phone volume
CODEC_MIC_VOL_REG = 0eh ; MIC volume
CODEC_LINE_IN_VOL_REG = 10h ; line input volume
CODEC_CD_VOL_REG = 12h ; CD volume
CODEC_VID_VOL_REG = 14h ; video volume
CODEC_AUX_VOL_REG = 16h ; aux volume
CODEC_PCM_OUT_REG = 18h ; PCM output volume
CODEC_RECORD_SELECT_REG = 1ah ; record select input
CODEC_RECORD_VOL_REG = 1ch ; record volume
CODEC_RECORD_MIC_VOL_REG = 1eh ; record mic volume
CODEC_GP_REG = 20h ; general purpose
CODEC_3D_CONTROL_REG = 22h ; 3D control
; 24h is reserved
CODEC_POWER_CTRL_REG = 26h ; powerdown control
CODEC_EXT_AUDIO_REG = 28h ; extended audio
CODEC_EXT_AUDIO_CTRL_REG = 2ah ; extended audio control
CODEC_PCM_FRONT_DACRATE_REG = 2ch ; PCM out sample rate
CODEC_PCM_SURND_DACRATE_REG = 2eh ; surround sound sample rate
CODEC_PCM_LFE_DACRATE_REG = 30h ; LFE sample rate
CODEC_LR_ADCRATE_REG = 32h ; PCM in sample rate
CODEC_MIC_ADCRATE_REG = 34h ; mic in sample rate
; registers 36-7a are reserved on the ICH
CODEC_VENDORID1_REG = 7ch ; codec vendor ID 1
CODEC_VENDORID2_REG = 7eh ; codec vendor ID 2
; When 2 codecs are present in the system, use BIT7 to access the 2nd
; set of registers, ie 80h-feh
SECONDARY_CODEC = BIT7 ; 80-8f registers for 2nda