345 lines
9.3 KiB
PHP
345 lines
9.3 KiB
PHP
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NAMBAR_read_byte:
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add dx, [NAMBAR]
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in al, dx
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ret
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NAMBAR_read_word:
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add dx, [NAMBAR]
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in ax, dx
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ret
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NAMBAR_read_dword:
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add dx, [NAMBAR]
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in eax, dx
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ret
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NAMBAR_write_byte:
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add dx, [NAMBAR]
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out dx, al
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ret
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NAMBAR_write_word:
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add dx, [NAMBAR]
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out dx, ax
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ret
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NAMBAR_write_dword:
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add dx, [NAMBAR]
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out dx, eax
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ret
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NABMBAR_read_byte:
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add dx, [NABMBAR]
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in al, dx
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ret
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NABMBAR_read_word:
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add dx, [NABMBAR]
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in ax, dx
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ret
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NABMBAR_read_dword:
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add dx, [NABMBAR]
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in eax, dx
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ret
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NABMBAR_write_byte:
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add dx, [NABMBAR]
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out dx, al
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ret
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NABMBAR_write_word:
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add dx, [NABMBAR]
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out dx, ax
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ret
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NABMBAR_write_dword:
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add dx, [NABMBAR]
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out dx, eax
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ret
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semaphore:
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push ecx edx
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mov edx, GLOB_STS_REG ; 0x30 global status register
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call NABMBAR_read_dword
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and eax, PRI_CODEC_RDY ; 100h primary codec ready
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jz .success ; exit if codec not ready !!!
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; mov ecx, 1024 ; try 1024 times
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mov ecx, 0ffffh ; try 65535 times
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.wait:
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mov edx, ACC_SEMA_REG ; 0x34 codec write semaphore
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call NABMBAR_read_byte
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and al, CODEC_BUSY ; 01h codec access semaphore
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jz .success ; exit if codec not busy !!!
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dec ecx
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jnz .wait
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pop edx ecx
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mov eax, 0
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jmp .exit
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.success:
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pop edx ecx
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mov eax, 1
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.exit:
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ret
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codecStop:
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push eax ebx edx
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mov edx, PO_CR_REG ; 0x1B control register
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mov al, 0 ; stop all PCM out data
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call NABMBAR_write_byte
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mcall MF_DELAY, eax ; ebx = (eax = MF_DELAY = 5); wait 50 ms
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mov edx, PO_CR_REG ; 0x1B control register
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mov al, RR ; reset PCM out regs
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call NABMBAR_write_byte
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mcall MF_DELAY, eax
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pop edx ebx eax
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ret
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; set voulme
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; in ax = volume level
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setVolume:
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push eax edx
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push eax
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call semaphore
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mov edx, CODEC_RESET_REG ; 0
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xor eax, eax ; register reset the codec
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call NAMBAR_write_word
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call semaphore
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pop eax
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imul ax, 0101h ; set volume for both chn
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mov edx, CODEC_MASTER_VOL_REG ; 2
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call NAMBAR_write_word
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push eax
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call semaphore
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pop eax ; set volume for both chn
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mov edx, CODEC_HP_VOL_REG ; 4
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call NAMBAR_write_word
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push eax
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call semaphore
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mov edx, CODEC_CD_VOL_REG ; 12h
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pop eax ; set volume for both chn
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shr eax, 2 ; adjust CD VOL
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call NAMBAR_write_word
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call semaphore
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mov edx, CODEC_PCM_OUT_REG ; 18h
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mov ax, 0808h ; standard PCM out volume
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call NAMBAR_write_word
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pop edx eax
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ret
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samplerate dw 0
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; enable codec, unmute stuff, set output to desired rate
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; in : ax = desired sample rate
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; out: ax = true or false
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;
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codecConfig:
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pushad
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mov [samplerate], ax ; save sample rate
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; mov edx, GLOB_STS_REG ; 30h global status register
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; call NABMBAR_read_dword
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; and eax, PRI_CODEC_RDY ; 0100h primary codec ready
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; jnz skip_init ; skip init if codec ready !!!
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; stop the codec if currently playing
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;;; call codecStop
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; mov edx, GLOB_STS_REG
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; call NABMBAR_read_dword
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; dps "GLOB_STA = "
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; dph eax
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; newline
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; mov edx, GLOB_CNT_REG
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; call NABMBAR_read_dword
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; dps "GLOB_CNT = "
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; dph eax
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; newline
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; mcall 5, 10
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;; test eax, ACCOLD_RESET
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;; jnz .skip_cold_reset
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; print "cold reset"
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; do a cold reset
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mov edx, GLOB_CNT_REG ; 2ch global control register
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xor eax, eax
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call NABMBAR_write_dword ; enable (AC Link off clear)
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; print "wait"
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mcall 5, 5
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; print "alive!"
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;; .skip_cold_reset:
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mov edx, GLOB_CNT_REG ; 2ch global control register
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mov eax, ACCOLD_RESET + PRI_RES_EN ; cold reset + primary resume
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call NABMBAR_write_dword ; 2 channels & 16 bit samples
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mov edx, GLOB_CNT_REG ; 2ch global control register
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call NABMBAR_read_dword
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and eax, ACCOLD_RESET ; cold reset
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jz init_error ; INIT FAILED !!!
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; print "cold reset finished"
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; wait for primary codec ready status
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mov ecx, 128
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codec_ready_loop:
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mov edx, GLOB_STS_REG ; 30h global status register
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call NABMBAR_read_dword
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and eax, PRI_CODEC_RDY ; 0100h primary codec ready
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jnz codec_ready_exit ; move on if codec ready !!!
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mcall 5, 1
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dec ecx
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jnz codec_ready_loop
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;dps "~"
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codec_ready_exit:
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; wait until codec init ready (*** replaces warm reset wait ***)
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mcall 5, 60
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; test if codec ready bit is finally set
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mov edx, GLOB_STS_REG ; 30h global status register
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call NABMBAR_read_dword
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and eax, PRI_CODEC_RDY ; 0100h primary codec ready
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jnz codec_ready_bit_set ; move on if codec ready !!!
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cmp [AC97ICH4], 1
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jne init_error
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; je codec_ready_bit_set ; ignore codec ready for ICH4
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; jmp init_error ; codec ready bit not set !!!
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codec_ready_bit_set:
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; clear semaphore flag
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mov edx, CODEC_RESET_REG ; 0h codec reset register
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call NAMBAR_read_word
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; check if codec sections ready
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call semaphore
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test eax, eax
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jz init_error
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mov edx, CODEC_POWER_CTRL_REG ; 26h codec powerdown ctrl
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call NAMBAR_read_word
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and eax, 01111b
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cmp eax, 01111b
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jne init_error ; codec sections not ready
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; disable interrupts
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mov al, 0
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mov edx, PI_CR_REG ; 0Bh PCM in control register
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call NABMBAR_write_byte
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mov edx, PO_CR_REG ; 1Bh PCM out control register
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call NABMBAR_write_byte
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mov edx, MC_CR_REG ; 2Bh MIC in control register
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call NABMBAR_write_byte
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; reset channels
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mov al, RR ; 02h reset Bus master regs
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mov edx, PI_CR_REG ; 0Bh PCM in control register
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call NABMBAR_write_byte
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mov edx, PO_CR_REG ; 1Bh PCM out control register
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call NABMBAR_write_byte
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mov edx, MC_CR_REG ; 2Bh MIC in control register
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call NABMBAR_write_byte
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; set default volume
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mov eax, 15 ; set average volume level
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call setVolume
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; set VRA and clear DRA (if not supported will be skipped)
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call semaphore
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test eax, eax
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jz init_error
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mov edx, CODEC_EXT_AUDIO_CTRL_REG ; register 2ah
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call NAMBAR_read_word ; get ext audio ctl
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mov ebx, eax
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call semaphore
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test eax, eax
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jz init_error
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mov eax, ebx
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and eax, 0FFFFh - BIT1 ; clear DRA (BIT1)
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or eax, BIT0 ; set VRA (BIT0)
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mov edx, CODEC_EXT_AUDIO_CTRL_REG ; register 2ah
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call NAMBAR_write_word ; write ext audio ctl
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; set desired sample rate
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skip_init:
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call semaphore
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test eax, eax
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jz init_error
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; mov edx, CODEC_PCM_FRONT_DACRATE_REG
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; call NAMBAR_read_word
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; and eax, 0xFFFF
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; newline
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; dps "old PCM OUT RATE: "
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; dpd eax
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; newline
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mov ax, [samplerate] ; restore sample rate
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; mov edx, CODEC_PCM_FRONT_DACRATE_REG ; register 2ch
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; call NAMBAR_write_word
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call set_sample_rate
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popad
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mov eax, 1 ; exit with success
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jmp exit_config
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init_error:
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popad
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xor eax, eax ; exit with error
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exit_config:
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ret
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set_sample_rate: ; rate in ax
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mov edx, CODEC_PCM_FRONT_DACRATE_REG ; 0x2C reg
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call NAMBAR_write_word
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ret
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