WebSVN – Kolibri OS – Blame – /programs/media/ac97wav/trunk/codec.inc

Rev	Author	Line No.	Line
31	halyavin	1
		2	add dx, [NAMBAR]
		3	in al, dx
		4	ret
		5
		6
		7
		8	add dx, [NAMBAR]
		9	in ax, dx
		10	ret
		11
		12
		13
		14	add dx, [NAMBAR]
		15	in eax, dx
		16	ret
		17
		18
		19	add dx, [NAMBAR]
		20	out dx, al
		21	ret
		22
		23
		24	add dx, [NAMBAR]
		25	out dx, ax
		26	ret
		27
		28
		29	add dx, [NAMBAR]
		30	out dx, eax
		31	ret
		32
		33
		34
		35
		36	add dx, [NABMBAR]
		37	in al, dx
		38	ret
		39
		40
		41	add dx, [NABMBAR]
		42	in ax, dx
		43	ret
		44
		45
		46	add dx, [NABMBAR]
		47	in eax, dx
		48	ret
		49
		50
		51	add dx, [NABMBAR]
		52	out dx, al
		53	ret
		54
		55
		56	add dx, [NABMBAR]
		57	out dx, ax
		58	ret
		59
		60
		61	add dx, [NABMBAR]
		62	out dx, eax
		63	ret
		64
		65
		66
		67
		68	push ecx edx
		69
		70
		71	call NABMBAR_read_dword
		72	and eax, PRI_CODEC_RDY ; 100h primary codec ready
		73	jz .success ; exit if codec not ready !!!
		74
		75
		76	mov ecx, 0ffffh ; try 65535 times
		77	.wait:
		78	mov edx, ACC_SEMA_REG ; 0x34 codec write semaphore
		79	call NABMBAR_read_byte
		80	and al, CODEC_BUSY ; 01h codec access semaphore
		81	jz .success ; exit if codec not busy !!!
		82
		83
		84	jnz .wait
		85
		86
		87	mov eax, 0
		88	jmp .exit
		89
		90
		91	pop edx ecx
		92	mov eax, 1
		93	.exit:
		94	ret
		95
		96
		97
		98
		99
		100
		101	push eax ebx edx
		102
		103
		104	mov al, 0 ; stop all PCM out data
		105	call NABMBAR_write_byte
		106
		107
		108
		109
		110	mov al, RR ; reset PCM out regs
		111	call NABMBAR_write_byte
		112
		113
		114
		115
		116	ret
		117
		118
		119
		120
		121
		122	; in ax = volume level
		123	setVolume:
		124	push eax edx
		125
		126
		127	call semaphore
		128	mov edx, CODEC_RESET_REG ; 0
		129	xor eax, eax ; register reset the codec
		130	call NAMBAR_write_word
		131
		132
		133	pop eax
		134	imul ax, 0101h ; set volume for both chn
		135	mov edx, CODEC_MASTER_VOL_REG ; 2
		136	call NAMBAR_write_word
		137	push eax
		138
		139
		140	pop eax ; set volume for both chn
		141	mov edx, CODEC_HP_VOL_REG ; 4
		142	call NAMBAR_write_word
		143	push eax
		144
		145
		146	mov edx, CODEC_CD_VOL_REG ; 12h
		147	pop eax ; set volume for both chn
		148	shr eax, 2 ; adjust CD VOL
		149	call NAMBAR_write_word
		150
		151
		152	mov edx, CODEC_PCM_OUT_REG ; 18h
		153	mov ax, 0808h ; standard PCM out volume
		154	call NAMBAR_write_word
		155
		156
		157	ret
		158
		159
		160
		161
		162
		163
		164
		165
		166
		167	; in : ax = desired sample rate
		168	; out: ax = true or false
		169	;
		170	codecConfig:
		171	pushad
		172	mov [samplerate], ax ; save sample rate
		173
		174
		175
		176	; call NABMBAR_read_dword
		177	; and eax, PRI_CODEC_RDY ; 0100h primary codec ready
		178	; jnz skip_init ; skip init if codec ready !!!
		179
		180
		181	;;; call codecStop
		182
		183
		184	; call NABMBAR_read_dword
		185	; dps "GLOB_STA = "
		186	; dph eax
		187	; newline
		188
		189
		190	; call NABMBAR_read_dword
		191	; dps "GLOB_CNT = "
		192	; dph eax
		193	; newline
		194
		195
		196
		197
		198	;; jnz .skip_cold_reset
		199
		200
		201	; do a cold reset
		202	mov edx, GLOB_CNT_REG ; 2ch global control register
		203	xor eax, eax
		204	call NABMBAR_write_dword ; enable (AC Link off clear)
		205
		206
		207	mcall 5, 5
		208	; print "alive!"
		209
		210
		211
		212
		213	mov eax, ACCOLD_RESET + PRI_RES_EN ; cold reset + primary resume
		214	call NABMBAR_write_dword ; 2 channels & 16 bit samples
		215
		216
		217	call NABMBAR_read_dword
		218	and eax, ACCOLD_RESET ; cold reset
		219	jz init_error ; INIT FAILED !!!
		220
		221
		222
		223
		224	mov ecx, 128
		225	codec_ready_loop:
		226	mov edx, GLOB_STS_REG ; 30h global status register
		227	call NABMBAR_read_dword
		228	and eax, PRI_CODEC_RDY ; 0100h primary codec ready
		229	jnz codec_ready_exit ; move on if codec ready !!!
		230	mcall 5, 1
		231	dec ecx
		232	jnz codec_ready_loop
		233	;dps "~"
		234	codec_ready_exit:
		235
		236
		237	mcall 5, 60
		238
		239
		240	mov edx, GLOB_STS_REG ; 30h global status register
		241	call NABMBAR_read_dword
		242	and eax, PRI_CODEC_RDY ; 0100h primary codec ready
		243	jnz codec_ready_bit_set ; move on if codec ready !!!
		244	cmp [AC97ICH4], 1
		245	jne init_error
		246	; je codec_ready_bit_set ; ignore codec ready for ICH4
		247	; jmp init_error ; codec ready bit not set !!!
		248	codec_ready_bit_set:
		249
		250
		251	mov edx, CODEC_RESET_REG ; 0h codec reset register
		252	call NAMBAR_read_word
		253
		254
		255
		256	call semaphore
		257	test eax, eax
		258	jz init_error
		259	mov edx, CODEC_POWER_CTRL_REG ; 26h codec powerdown ctrl
		260	call NAMBAR_read_word
		261	and eax, 01111b
		262	cmp eax, 01111b
		263	jne init_error ; codec sections not ready
		264
		265
		266
		267
		268	mov al, 0
		269
		270
		271	call NABMBAR_write_byte
		272
		273
		274	call NABMBAR_write_byte
		275
		276
		277	call NABMBAR_write_byte
		278
		279
		280	mov al, RR ; 02h reset Bus master regs
		281
		282
		283	call NABMBAR_write_byte
		284
		285
		286	call NABMBAR_write_byte
		287
		288
		289	call NABMBAR_write_byte
		290
		291
		292	mov eax, 15 ; set average volume level
		293	call setVolume
		294
		295
		296	call semaphore
		297	test eax, eax
		298	jz init_error
		299	mov edx, CODEC_EXT_AUDIO_CTRL_REG ; register 2ah
		300	call NAMBAR_read_word ; get ext audio ctl
		301
		302
		303	call semaphore
		304	test eax, eax
		305	jz init_error
		306	mov eax, ebx
		307	and eax, 0FFFFh - BIT1 ; clear DRA (BIT1)
		308	or eax, BIT0 ; set VRA (BIT0)
		309	mov edx, CODEC_EXT_AUDIO_CTRL_REG ; register 2ah
		310	call NAMBAR_write_word ; write ext audio ctl
		311
		312
		313	skip_init:
		314	call semaphore
		315	test eax, eax
		316	jz init_error
		317
		318
		319	; call NAMBAR_read_word
		320	; and eax, 0xFFFF
		321	; newline
		322	; dps "old PCM OUT RATE: "
		323	; dpd eax
		324	; newline
		325
		326
		327	; mov edx, CODEC_PCM_FRONT_DACRATE_REG ; register 2ch
		328	; call NAMBAR_write_word
		329	call set_sample_rate
		330
		331
		332	mov eax, 1 ; exit with success
		333	jmp exit_config
		334	init_error:
		335	popad
		336	xor eax, eax ; exit with error
		337	exit_config:
		338	ret
		339
		340
		341	mov edx, CODEC_PCM_FRONT_DACRATE_REG ; 0x2C reg
		342	call NAMBAR_write_word
		343	ret
		344

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