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[ALSA] Add position_fix module option
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / Documentation / sound / alsa / ALSA-Configuration.txt
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1da177e4
LT		 1
2 Advanced Linux Sound Architecture - Driver
3 ==========================================
4 Configuration guide
5
6
7Kernel Configuration
8====================
9
10To enable ALSA support you need at least to build the kernel with
11primary sound card support (CONFIG_SOUND). Since ALSA can emulate OSS,
12you don't have to choose any of the OSS modules.
13
14Enable "OSS API emulation" (CONFIG_SND_OSSEMUL) and both OSS mixer and
15PCM supports if you want to run OSS applications with ALSA.
16
17If you want to support the WaveTable functionality on cards such as
18SB Live! then you need to enable "Sequencer support"
19(CONFIG_SND_SEQUENCER).
20
21To make ALSA debug messages more verbose, enable the "Verbose printk"
22and "Debug" options. To check for memory leaks, turn on "Debug memory"
23too. "Debug detection" will add checks for the detection of cards.
24
25Please note that all the ALSA ISA drivers support the Linux isapnp API
26(if the card supports ISA PnP). You don't need to configure the cards
27using isapnptools.
28
29
30Creating ALSA devices
31=====================
32
33This depends on your distribution, but normally you use the /dev/MAKEDEV
34script to create the necessary device nodes. On some systems you use a
35script named 'snddevices'.
36
37
38Module parameters
39=================
40
41The user can load modules with options. If the module supports more than
42one card and you have more than one card of the same type then you can
43specify multiple values for the option separated by commas.
44
45Prior to version 0.9.0rc4 options had a 'snd_' prefix. This was removed.
46
47 Module snd
48 ----------
49
50 The core ALSA module. It is used by all ALSA card drivers.
51 It takes the following options which have global effects.
52
53 major - major number for sound driver
54 - Default: 116
55 cards_limit
56 - limiting card index for auto-loading (1-8)
57 - Default: 1
58 - For auto-loading more than one card, specify this
59 option together with snd-card-X aliases.
60 device_mode
61 - permission mask for dynamic sound device filesystem
62 - This is available only when DEVFS is enabled
63 - Default: 0666
64 - E.g.: device_mode=0660
65
66
67 Module snd-pcm-oss
68 ------------------
69
70 The PCM OSS emulation module.
71 This module takes options which change the mapping of devices.
72
73 dsp_map - PCM device number maps assigned to the 1st OSS device.
74 - Default: 0
75 adsp_map - PCM device number maps assigned to the 2st OSS device.
76 - Default: 1
77 nonblock_open
78 - Don't block opening busy PCM devices.
79
80 For example, when dsp_map=2, /dev/dsp will be mapped to PCM #2 of
81 the card #0. Similarly, when adsp_map=0, /dev/adsp will be mapped
82 to PCM #0 of the card #0.
83 For changing the second or later card, specify the option with
84 commas, such like "dsp_map=0,1".
85
86 nonblock_open option is used to change the behavior of the PCM
87 regarding opening the device. When this option is non-zero,
88 opening a busy OSS PCM device won't be blocked but return
89 immediately with EAGAIN (just like O_NONBLOCK flag).
90
91 Module snd-rawmidi
92 ------------------
93
94 This module takes options which change the mapping of devices.
95 similar to those of the snd-pcm-oss module.
96
97 midi_map - MIDI device number maps assigned to the 1st OSS device.
98 - Default: 0
99 amidi_map - MIDI device number maps assigned to the 2st OSS device.
100 - Default: 1
101
102 Common parameters for top sound card modules
103 --------------------------------------------
104
105 Each of top level sound card module takes the following options.
106
107 index - index (slot #) of sound card
108 - Values: 0 through 7 or negative
109 - If nonnegative, assign that index number
110 - if negative, interpret as a bitmask of permissible
111 indices; the first free permitted index is assigned
112 - Default: -1
113 id - card ID (identifier or name)
114 - Can be up to 15 characters long
115 - Default: the card type
116 - A directory by this name is created under /proc/asound/
117 containing information about the card
118 - This ID can be used instead of the index number in
119 identifying the card
120 enable - enable card
121 - Default: enabled, for PCI and ISA PnP cards
122
123 Module snd-ad1816a
124 ------------------
125
126 Module for sound cards based on Analog Devices AD1816A/AD1815 ISA chips.
127
128 port - port # for AD1816A chip (PnP setup)
129 mpu_port - port # for MPU-401 UART (PnP setup)
130 fm_port - port # for OPL3 (PnP setup)
131 irq - IRQ # for AD1816A chip (PnP setup)
132 mpu_irq - IRQ # for MPU-401 UART (PnP setup)
133 dma1 - first DMA # for AD1816A chip (PnP setup)
134 dma2 - second DMA # for AD1816A chip (PnP setup)
135
136 Module supports up to 8 cards, autoprobe and PnP.
137
138 Module snd-ad1848
139 -----------------
140
141 Module for sound cards based on AD1848/AD1847/CS4248 ISA chips.
142
143 port - port # for AD1848 chip
144 irq - IRQ # for AD1848 chip
145 dma1 - DMA # for AD1848 chip (0,1,3)
146
147 Module supports up to 8 cards. This module does not support autoprobe
148 thus main port must be specified!!! Other ports are optional.
149
150 Module snd-ali5451
151 ------------------
152
153 Module for ALi M5451 PCI chip.
154
155 pcm_channels - Number of hardware channels assigned for PCM
156 spdif - Support SPDIF I/O
157 - Default: disabled
158
159 Module supports autoprobe and multiple chips (max 8).
160
161 The power-management is supported.
162
163 Module snd-als100
164 -----------------
165
166 Module for sound cards based on Avance Logic ALS100/ALS120 ISA chips.
167
168 port - port # for ALS100 (SB16) chip (PnP setup)
169 irq - IRQ # for ALS100 (SB16) chip (PnP setup)
170 dma8 - 8-bit DMA # for ALS100 (SB16) chip (PnP setup)
171 dma16 - 16-bit DMA # for ALS100 (SB16) chip (PnP setup)
172 mpu_port - port # for MPU-401 UART (PnP setup)
173 mpu_irq - IRQ # for MPU-401 (PnP setup)
174 fm_port - port # for OPL3 FM (PnP setup)
175
176 Module supports up to 8 cards, autoprobe and PnP.
177
178 Module snd-als4000
179 ------------------
180
181 Module for sound cards based on Avance Logic ALS4000 PCI chip.
182
183 joystick_port - port # for legacy joystick support.
184 0 = disabled (default), 1 = auto-detect
185
186 Module supports up to 8 cards, autoprobe and PnP.
187
188 Module snd-atiixp
189 -----------------
190
191 Module for ATI IXP 150/200/250 AC97 controllers.
192
193 ac97_clock - AC'97 clock (defalut = 48000)
194 ac97_quirk - AC'97 workaround for strange hardware
195 See the description of intel8x0 module for details.
196 spdif_aclink - S/PDIF transfer over AC-link (default = 1)
197
198 This module supports up to 8 cards and autoprobe.
199
200 Module snd-atiixp-modem
201 -----------------------
202
203 Module for ATI IXP 150/200/250 AC97 modem controllers.
204
205 Module supports up to 8 cards.
206
207 Note: The default index value of this module is -2, i.e. the first
208 slot is excluded.
209
210 Module snd-au8810, snd-au8820, snd-au8830
211 -----------------------------------------
212
213 Module for Aureal Vortex, Vortex2 and Advantage device.
214
215 pcifix - Control PCI workarounds
216 0 = Disable all workarounds
217 1 = Force the PCI latency of the Aureal card to 0xff
218 2 = Force the Extend PCI#2 Internal Master for Efficient
219 Handling of Dummy Requests on the VIA KT133 AGP Bridge
220 3 = Force both settings
221 255 = Autodetect what is required (default)
222
223 This module supports all ADB PCM channels, ac97 mixer, SPDIF, hardware
224 EQ, mpu401, gameport. A3D and wavetable support are still in development.
225 Development and reverse engineering work is being coordinated at
226 http://savannah.nongnu.org/projects/openvortex/
227 SPDIF output has a copy of the AC97 codec output, unless you use the
228 "spdif" pcm device, which allows raw data passthru.
229 The hardware EQ hardware and SPDIF is only present in the Vortex2 and
230 Advantage.
231
232 Note: Some ALSA mixer applicactions don't handle the SPDIF samplerate
233 control correctly. If you have problems regarding this, try
234 another ALSA compliant mixer (alsamixer works).
235
236 Module snd-azt2320
237 ------------------
238
239 Module for sound cards based on Aztech System AZT2320 ISA chip (PnP only).
240
241 port - port # for AZT2320 chip (PnP setup)
242 wss_port - port # for WSS (PnP setup)
243 mpu_port - port # for MPU-401 UART (PnP setup)
244 fm_port - FM port # for AZT2320 chip (PnP setup)
245 irq - IRQ # for AZT2320 (WSS) chip (PnP setup)
246 mpu_irq - IRQ # for MPU-401 UART (PnP setup)
247 dma1 - 1st DMA # for AZT2320 (WSS) chip (PnP setup)
248 dma2 - 2nd DMA # for AZT2320 (WSS) chip (PnP setup)
249
250 Module supports up to 8 cards, PnP and autoprobe.
251
252 Module snd-azt3328
253 ------------------
254
255 Module for sound cards based on Aztech AZF3328 PCI chip.
256
257 joystick - Enable joystick (default off)
258
259 Module supports up to 8 cards.
260
261 Module snd-bt87x
262 ----------------
263
264 Module for video cards based on Bt87x chips.
265
266 digital_rate - Override the default digital rate (Hz)
267 load_all - Load the driver even if the card model isn't known
268
269 Module supports up to 8 cards.
270
271 Note: The default index value of this module is -2, i.e. the first
272 slot is excluded.
273
274 Module snd-ca0106
275 -----------------
276
277 Module for Creative Audigy LS and SB Live 24bit
278
279 Module supports up to 8 cards.
280
281
282 Module snd-cmi8330
283 ------------------
284
285 Module for sound cards based on C-Media CMI8330 ISA chips.
286
287 wssport - port # for CMI8330 chip (WSS)
288 wssirq - IRQ # for CMI8330 chip (WSS)
289 wssdma - first DMA # for CMI8330 chip (WSS)
290 sbport - port # for CMI8330 chip (SB16)
291 sbirq - IRQ # for CMI8330 chip (SB16)
292 sbdma8 - 8bit DMA # for CMI8330 chip (SB16)
293 sbdma16 - 16bit DMA # for CMI8330 chip (SB16)
294
295 Module supports up to 8 cards and autoprobe.
296
297 Module snd-cmipci
298 -----------------
299
300 Module for C-Media CMI8338 and 8738 PCI sound cards.
301
302 mpu_port - 0x300,0x310,0x320,0x330, 0 = disable (default)
303 fm_port - 0x388 (default), 0 = disable (default)
304 soft_ac3 - Sofware-conversion of raw SPDIF packets (model 033 only)
305 (default = 1)
306 joystick_port - Joystick port address (0 = disable, 1 = auto-detect)
307
308 Module supports autoprobe and multiple chips (max 8).
309
310 Module snd-cs4231
311 -----------------
312
313 Module for sound cards based on CS4231 ISA chips.
314
315 port - port # for CS4231 chip
316 mpu_port - port # for MPU-401 UART (optional), -1 = disable
317 irq - IRQ # for CS4231 chip
318 mpu_irq - IRQ # for MPU-401 UART
319 dma1 - first DMA # for CS4231 chip
320 dma2 - second DMA # for CS4231 chip
321
322 Module supports up to 8 cards. This module does not support autoprobe
323 thus main port must be specified!!! Other ports are optional.
324
325 The power-management is supported.
326
327 Module snd-cs4232
328 -----------------
329
330 Module for sound cards based on CS4232/CS4232A ISA chips.
331
332 port - port # for CS4232 chip (PnP setup - 0x534)
333 cport - control port # for CS4232 chip (PnP setup - 0x120,0x210,0xf00)
334 mpu_port - port # for MPU-401 UART (PnP setup - 0x300), -1 = disable
335 fm_port - FM port # for CS4232 chip (PnP setup - 0x388), -1 = disable
336 irq - IRQ # for CS4232 chip (5,7,9,11,12,15)
337 mpu_irq - IRQ # for MPU-401 UART (9,11,12,15)
338 dma1 - first DMA # for CS4232 chip (0,1,3)
339 dma2 - second DMA # for Yamaha CS4232 chip (0,1,3), -1 = disable
340 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
341
342 Module supports up to 8 cards. This module does not support autoprobe
343 thus main port must be specified!!! Other ports are optional.
344
345 The power-management is supported.
346
347 Module snd-cs4236
348 -----------------
349
350 Module for sound cards based on CS4235/CS4236/CS4236B/CS4237B/
351 CS4238B/CS4239 ISA chips.
352
353 port - port # for CS4236 chip (PnP setup - 0x534)
354 cport - control port # for CS4236 chip (PnP setup - 0x120,0x210,0xf00)
355 mpu_port - port # for MPU-401 UART (PnP setup - 0x300), -1 = disable
356 fm_port - FM port # for CS4236 chip (PnP setup - 0x388), -1 = disable
357 irq - IRQ # for CS4236 chip (5,7,9,11,12,15)
358 mpu_irq - IRQ # for MPU-401 UART (9,11,12,15)
359 dma1 - first DMA # for CS4236 chip (0,1,3)
360 dma2 - second DMA # for CS4236 chip (0,1,3), -1 = disable
361 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
362
363 Module supports up to 8 cards. This module does not support autoprobe
364 (if ISA PnP is not used) thus main port and control port must be
365 specified!!! Other ports are optional.
366
367 The power-management is supported.
368
369 Module snd-cs4281
370 -----------------
371
372 Module for Cirrus Logic CS4281 soundchip.
373
374 dual_codec - Secondary codec ID (0 = disable, default)
375
376 Module supports up to 8 cards.
377
378 The power-management is supported.
379
380 Module snd-cs46xx
381 -----------------
382
383 Module for PCI sound cards based on CS4610/CS4612/CS4614/CS4615/CS4622/
384 CS4624/CS4630/CS4280 PCI chips.
385
386 external_amp - Force to enable external amplifer.
387 thinkpad - Force to enable Thinkpad's CLKRUN control.
388 mmap_valid - Support OSS mmap mode (default = 0).
389
390 Module supports up to 8 cards and autoprobe.
391 Usually external amp and CLKRUN controls are detected automatically
392 from PCI sub vendor/device ids. If they don't work, give the options
393 above explicitly.
394
395 The power-management is supported.
396
397 Module snd-dt019x
398 -----------------
399
400 Module for Diamond Technologies DT-019X / Avance Logic ALS-007 (PnP
401 only)
402
403 port - Port # (PnP setup)
404 mpu_port - Port # for MPU-401 (PnP setup)
405 fm_port - Port # for FM OPL-3 (PnP setup)
406 irq - IRQ # (PnP setup)
407 mpu_irq - IRQ # for MPU-401 (PnP setup)
408 dma8 - DMA # (PnP setup)
409
410 Module supports up to 8 cards. This module is enabled only with
411 ISA PnP support.
412
413 Module snd-dummy
414 ----------------
415
416 Module for the dummy sound card. This "card" doesn't do any output
417 or input, but you may use this module for any application which
418 requires a sound card (like RealPlayer).
419
420 Module snd-emu10k1
421 ------------------
422
423 Module for EMU10K1/EMU10k2 based PCI sound cards.
424 * Sound Blaster Live!
425 * Sound Blaster PCI 512
426 * Emu APS (partially supported)
427 * Sound Blaster Audigy
428
429 extin - bitmap of available external inputs for FX8010 (see bellow)
430 extout - bitmap of available external outputs for FX8010 (see bellow)
431 seq_ports - allocated sequencer ports (4 by default)
432 max_synth_voices - limit of voices used for wavetable (64 by default)
433 max_buffer_size - specifies the maximum size of wavetable/pcm buffers
434 given in MB unit. Default value is 128.
435 enable_ir - enable IR
436
437 Module supports up to 8 cards and autoprobe.
438
439 Input & Output configurations [extin/extout]
440 * Creative Card wo/Digital out [0x0003/0x1f03]
441 * Creative Card w/Digital out [0x0003/0x1f0f]
442 * Creative Card w/Digital CD in [0x000f/0x1f0f]
443 * Creative Card wo/Digital out + LiveDrive [0x3fc3/0x1fc3]
444 * Creative Card w/Digital out + LiveDrive [0x3fc3/0x1fcf]
445 * Creative Card w/Digital CD in + LiveDrive [0x3fcf/0x1fcf]
446 * Creative Card wo/Digital out + Digital I/O 2 [0x0fc3/0x1f0f]
447 * Creative Card w/Digital out + Digital I/O 2 [0x0fc3/0x1f0f]
448 * Creative Card w/Digital CD in + Digital I/O 2 [0x0fcf/0x1f0f]
449 * Creative Card 5.1/w Digital out + LiveDrive [0x3fc3/0x1fff]
450 * Creative Card 5.1 (c) 2003 [0x3fc3/0x7cff]
451 * Creative Card all ins and outs [0x3fff/0x7fff]
452
453 Module snd-emu10k1x
454 -------------------
455
456 Module for Creative Emu10k1X (SB Live Dell OEM version)
457
458 Module supports up to 8 cards.
459
460 Module snd-ens1370
461 ------------------
462
463 Module for Ensoniq AudioPCI ES1370 PCI sound cards.
464 * SoundBlaster PCI 64
465 * SoundBlaster PCI 128
466
467 joystick - Enable joystick (default off)
468
469 Module supports up to 8 cards and autoprobe.
470
471 Module snd-ens1371
472 ------------------
473
474 Module for Ensoniq AudioPCI ES1371 PCI sound cards.
475 * SoundBlaster PCI 64
476 * SoundBlaster PCI 128
477 * SoundBlaster Vibra PCI
478
479 joystick_port - port # for joystick (0x200,0x208,0x210,0x218),
480 0 = disable (default), 1 = auto-detect
481
482 Module supports up to 8 cards and autoprobe.
483
484 Module snd-es968
485 ----------------
486
487 Module for sound cards based on ESS ES968 chip (PnP only).
488
489 port - port # for ES968 (SB8) chip (PnP setup)
490 irq - IRQ # for ES968 (SB8) chip (PnP setup)
491 dma1 - DMA # for ES968 (SB8) chip (PnP setup)
492
493 Module supports up to 8 cards, PnP and autoprobe.
494
495 Module snd-es1688
496 -----------------
497
498 Module for ESS AudioDrive ES-1688 and ES-688 sound cards.
499
500 port - port # for ES-1688 chip (0x220,0x240,0x260)
501 mpu_port - port # for MPU-401 port (0x300,0x310,0x320,0x330), -1 = disable (default)
502 irq - IRQ # for ES-1688 chip (5,7,9,10)
503 mpu_irq - IRQ # for MPU-401 port (5,7,9,10)
504 dma8 - DMA # for ES-1688 chip (0,1,3)
505
506 Module supports up to 8 cards and autoprobe (without MPU-401 port).
507
508 Module snd-es18xx
509 -----------------
510
511 Module for ESS AudioDrive ES-18xx sound cards.
512
513 port - port # for ES-18xx chip (0x220,0x240,0x260)
514 mpu_port - port # for MPU-401 port (0x300,0x310,0x320,0x330), -1 = disable (default)
515 fm_port - port # for FM (optional, not used)
516 irq - IRQ # for ES-18xx chip (5,7,9,10)
517 dma1 - first DMA # for ES-18xx chip (0,1,3)
518 dma2 - first DMA # for ES-18xx chip (0,1,3)
519 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
520
521 Module supports up to 8 cards ISA PnP and autoprobe (without MPU-401 port
522 if native ISA PnP routines are not used).
523 When dma2 is equal with dma1, the driver works as half-duplex.
524
525 The power-management is supported.
526
527 Module snd-es1938
528 -----------------
529
530 Module for sound cards based on ESS Solo-1 (ES1938,ES1946) chips.
531
532 Module supports up to 8 cards and autoprobe.
533
534 Module snd-es1968
535 -----------------
536
537 Module for sound cards based on ESS Maestro-1/2/2E (ES1968/ES1978) chips.
538
539 total_bufsize - total buffer size in kB (1-4096kB)
540 pcm_substreams_p - playback channels (1-8, default=2)
541 pcm_substreams_c - capture channels (1-8, default=0)
542 clock - clock (0 = auto-detection)
543 use_pm - support the power-management (0 = off, 1 = on,
544 2 = auto (default))
545 enable_mpu - enable MPU401 (0 = off, 1 = on, 2 = auto (default))
546 joystick - enable joystick (default off)
547
548 Module supports up to 8 cards and autoprobe.
549
550 The power-management is supported.
551
552 Module snd-fm801
553 ----------------
554
555 Module for ForteMedia FM801 based PCI sound cards.
556
557 tea575x_tuner - Enable TEA575x tuner
558 - 1 = MediaForte 256-PCS
559 - 2 = MediaForte 256-PCPR
560 - 3 = MediaForte 64-PCR
561 - High 16-bits are video (radio) device number + 1
562 - example: 0x10002 (MediaForte 256-PCPR, device 1)
563
564 Module supports up to 8 cards and autoprobe.
565
566 Module snd-gusclassic
567 ---------------------
568
569 Module for Gravis UltraSound Classic sound card.
570
571 port - port # for GF1 chip (0x220,0x230,0x240,0x250,0x260)
572 irq - IRQ # for GF1 chip (3,5,9,11,12,15)
573 dma1 - DMA # for GF1 chip (1,3,5,6,7)
574 dma2 - DMA # for GF1 chip (1,3,5,6,7,-1=disable)
575 joystick_dac - 0 to 31, (0.59V-4.52V or 0.389V-2.98V)
576 voices - GF1 voices limit (14-32)
577 pcm_voices - reserved PCM voices
578
579 Module supports up to 8 cards and autoprobe.
580
581 Module snd-gusextreme
582 ---------------------
583
584 Module for Gravis UltraSound Extreme (Synergy ViperMax) sound card.
585
586 port - port # for ES-1688 chip (0x220,0x230,0x240,0x250,0x260)
587 gf1_port - port # for GF1 chip (0x210,0x220,0x230,0x240,0x250,0x260,0x270)
588 mpu_port - port # for MPU-401 port (0x300,0x310,0x320,0x330), -1 = disable
589 irq - IRQ # for ES-1688 chip (5,7,9,10)
590 gf1_irq - IRQ # for GF1 chip (3,5,9,11,12,15)
591 mpu_irq - IRQ # for MPU-401 port (5,7,9,10)
592 dma8 - DMA # for ES-1688 chip (0,1,3)
593 dma1 - DMA # for GF1 chip (1,3,5,6,7)
594 joystick_dac - 0 to 31, (0.59V-4.52V or 0.389V-2.98V)
595 voices - GF1 voices limit (14-32)
596 pcm_voices - reserved PCM voices
597
598 Module supports up to 8 cards and autoprobe (without MPU-401 port).
599
600 Module snd-gusmax
601 -----------------
602
603 Module for Gravis UltraSound MAX sound card.
604
605 port - port # for GF1 chip (0x220,0x230,0x240,0x250,0x260)
606 irq - IRQ # for GF1 chip (3,5,9,11,12,15)
607 dma1 - DMA # for GF1 chip (1,3,5,6,7)
608 dma2 - DMA # for GF1 chip (1,3,5,6,7,-1=disable)
609 joystick_dac - 0 to 31, (0.59V-4.52V or 0.389V-2.98V)
610 voices - GF1 voices limit (14-32)
611 pcm_voices - reserved PCM voices
612
613 Module supports up to 8 cards and autoprobe.
614
615 Module snd-hda-intel
616 --------------------
617
618 Module for Intel HD Audio (ICH6, ICH6M, ICH7)
619
620 model - force the model name
c74db86b 621 position_fix - Fix DMA pointer (0 = FIFO size, 1 = none, 2 = POSBUF)
1da177e4
LT		 622
623 Module supports up to 8 cards.
624
625 Each codec may have a model table for different configurations.
626 If your machine isn't listed there, the default (usually minimal)
627 configuration is set up. You can pass "model=<name>" option to
628 specify a certain model in such a case. There are different
629 models depending on the codec chip.
630
631 Model name Description
632 ---------- -----------
633 ALC880
634 3stack 3-jack in back and a headphone out
635 3stack-digout 3-jack in back, a HP out and a SPDIF out
636 5stack 5-jack in back, 2-jack in front
637 5stack-digout 5-jack in back, 2-jack in front, a SPDIF out
638 w810 3-jack
639
640 CMI9880
641 minimal 3-jack in back
642 min_fp 3-jack in back, 2-jack in front
643 full 6-jack in back, 2-jack in front
644 full_dig 6-jack in back, 2-jack in front, SPDIF I/O
645 allout 5-jack in back, 2-jack in front, SPDIF out
646
c74db86b
TI		 647 Note 2: If you get click noises on output, try the module option
648 position_fix=1 or 2. position_fix=1 will use the SD_LPIB
649 register value without FIFO size correction as the current
650 DMA pointer. position_fix=2 will make the driver to use
651 the position buffer instead of reading SD_LPIB register.
652 (Usually SD_LPLIB register is more accurate than the
653 position buffer.)
654
1da177e4
LT		 655 Module snd-hdsp
656 ---------------
657
658 Module for RME Hammerfall DSP audio interface(s)
659
660 Module supports up to 8 cards.
661
662 Note: The firmware data can be automatically loaded via hotplug
663 when CONFIG_FW_LOADER is set. Otherwise, you need to load
664 the firmware via hdsploader utility included in alsa-tools
665 package.
666 The firmware data is found in alsa-firmware package.
667
668 Note: snd-page-alloc module does the job which snd-hammerfall-mem
669 module did formerly. It will allocate the buffers in advance
670 when any HDSP cards are found. To make the buffer
671 allocation sure, load snd-page-alloc module in the early
672 stage of boot sequence.
673
674 Module snd-ice1712
675 ------------------
676
677 Module for Envy24 (ICE1712) based PCI sound cards.
678 * MidiMan M Audio Delta 1010
679 * MidiMan M Audio Delta 1010LT
680 * MidiMan M Audio Delta DiO 2496
681 * MidiMan M Audio Delta 66
682 * MidiMan M Audio Delta 44
683 * MidiMan M Audio Delta 410
684 * MidiMan M Audio Audiophile 2496
685 * TerraTec EWS 88MT
686 * TerraTec EWS 88D
687 * TerraTec EWX 24/96
688 * TerraTec DMX 6Fire
689 * Hoontech SoundTrack DSP 24
690 * Hoontech SoundTrack DSP 24 Value
691 * Hoontech SoundTrack DSP 24 Media 7.1
692 * Digigram VX442
693
694 model - Use the given board model, one of the following:
695 delta1010, dio2496, delta66, delta44, audiophile, delta410,
696 delta1010lt, vx442, ewx2496, ews88mt, ews88mt_new, ews88d,
697 dmx6fire, dsp24, dsp24_value, dsp24_71, ez8
698 omni - Omni I/O support for MidiMan M-Audio Delta44/66
699 cs8427_timeout - reset timeout for the CS8427 chip (S/PDIF transciever)
700 in msec resolution, default value is 500 (0.5 sec)
701
702 Module supports up to 8 cards and autoprobe. Note: The consumer part
703 is not used with all Envy24 based cards (for example in the MidiMan Delta
704 serie).
705
706 Module snd-ice1724
707 ------------------
708
709 Module for Envy24HT (VT/ICE1724) based PCI sound cards.
710 * MidiMan M Audio Revolution 7.1
711 * AMP Ltd AUDIO2000
712 * TerraTec Aureon Sky-5.1, Space-7.1
713
714 model - Use the given board model, one of the following:
715 revo71, amp2000, prodigy71, aureon51, aureon71,
716 k8x800
717
718 Module supports up to 8 cards and autoprobe.
719
720 Module snd-intel8x0
721 -------------------
722
723 Module for AC'97 motherboards from Intel and compatibles.
724 * Intel i810/810E, i815, i820, i830, i84x, MX440
725 * SiS 7012 (SiS 735)
726 * NVidia NForce, NForce2
727 * AMD AMD768, AMD8111
728 * ALi m5455
729
730 ac97_clock - AC'97 codec clock base (0 = auto-detect)
731 ac97_quirk - AC'97 workaround for strange hardware
732 The following strings are accepted:
733 default = don't override the default setting
734 disable = disable the quirk
735 hp_only = use headphone control as master
736 swap_hp = swap headphone and master controls
737 swap_surround = swap master and surround controls
738 ad_sharing = for AD1985, turn on OMS bit and use headphone
739 alc_jack = for ALC65x, turn on the jack sense mode
740 inv_eapd = inverted EAPD implementation
741 mute_led = bind EAPD bit for turning on/off mute LED
742 For backward compatibility, the corresponding integer
743 value -1, 0, ... are accepted, too.
744 buggy_irq - Enable workaround for buggy interrupts on some
745 motherboards (default off)
746
747 Module supports autoprobe and multiple bus-master chips (max 8).
748
749 Note: the latest driver supports auto-detection of chip clock.
750 if you still encounter too fast playback, specify the clock
751 explicitly via the module option "ac97_clock=41194".
752
753 Joystick/MIDI ports are not supported by this driver. If your
754 motherboard has these devices, use the ns558 or snd-mpu401
755 modules, respectively.
756
757 The ac97_quirk option is used to enable/override the workaround
758 for specific devices. Some hardware have swapped output pins
759 between Master and Headphone, or Surround. The driver provides
760 the auto-detection of known problematic devices, but some might
761 be unknown or wrongly detected. In such a case, pass the proper
762 value with this option.
763
764 The power-management is supported.
765
766 Module snd-intel8x0m
767 --------------------
768
769 Module for Intel ICH (i8x0) chipset MC97 modems.
770
771 ac97_clock - AC'97 codec clock base (0 = auto-detect)
772
773 This module supports up to 8 cards and autoprobe.
774
775 Note: The default index value of this module is -2, i.e. the first
776 slot is excluded.
777
778 Module snd-interwave
779 --------------------
780
781 Module for Gravis UltraSound PnP, Dynasonic 3-D/Pro, STB Sound Rage 32
782 and other sound cards based on AMD InterWave (tm) chip.
783
784 port - port # for InterWave chip (0x210,0x220,0x230,0x240,0x250,0x260)
785 irq - IRQ # for InterWave chip (3,5,9,11,12,15)
786 dma1 - DMA # for InterWave chip (0,1,3,5,6,7)
787 dma2 - DMA # for InterWave chip (0,1,3,5,6,7,-1=disable)
788 joystick_dac - 0 to 31, (0.59V-4.52V or 0.389V-2.98V)
789 midi - 1 = MIDI UART enable, 0 = MIDI UART disable (default)
790 pcm_voices - reserved PCM voices for the synthesizer (default 2)
791 effect - 1 = InterWave effects enable (default 0);
792 requires 8 voices
793
794 Module supports up to 8 cards, autoprobe and ISA PnP.
795
796 Module snd-interwave-stb
797 ------------------------
798
799 Module for UltraSound 32-Pro (sound card from STB used by Compaq)
800 and other sound cards based on AMD InterWave (tm) chip with TEA6330T
801 circuit for extended control of bass, treble and master volume.
802
803 port - port # for InterWave chip (0x210,0x220,0x230,0x240,0x250,0x260)
804 port_tc - tone control (i2c bus) port # for TEA6330T chip (0x350,0x360,0x370,0x380)
805 irq - IRQ # for InterWave chip (3,5,9,11,12,15)
806 dma1 - DMA # for InterWave chip (0,1,3,5,6,7)
807 dma2 - DMA # for InterWave chip (0,1,3,5,6,7,-1=disable)
808 joystick_dac - 0 to 31, (0.59V-4.52V or 0.389V-2.98V)
809 midi - 1 = MIDI UART enable, 0 = MIDI UART disable (default)
810 pcm_voices - reserved PCM voices for the synthesizer (default 2)
811 effect - 1 = InterWave effects enable (default 0);
812 requires 8 voices
813
814 Module supports up to 8 cards, autoprobe and ISA PnP.
815
816 Module snd-korg1212
817 -------------------
818
819 Module for Korg 1212 IO PCI card
820
821 Module supports up to 8 cards.
822
823 Module snd-maestro3
824 -------------------
825
826 Module for Allegro/Maestro3 chips
827
828 external_amp - enable external amp (enabled by default)
829 amp_gpio - GPIO pin number for external amp (0-15) or
830 -1 for default pin (8 for allegro, 1 for
831 others)
832
833 Module supports autoprobe and multiple chips (max 8).
834
835 Note: the binding of amplifier is dependent on hardware.
836 If there is no sound even though all channels are unmuted, try to
837 specify other gpio connection via amp_gpio option.
838 For example, a Panasonic notebook might need "amp_gpio=0x0d"
839 option.
840
841 The power-management is supported.
842
843 Module snd-mixart
844 -----------------
845
846 Module for Digigram miXart8 sound cards.
847
848 Module supports multiple cards.
849 Note: One miXart8 board will be represented as 4 alsa cards.
850 See MIXART.txt for details.
851
852 When the driver is compiled as a module and the hotplug firmware
853 is supported, the firmware data is loaded via hotplug automatically.
854 Install the necessary firmware files in alsa-firmware package.
855 When no hotplug fw loader is available, you need to load the
856 firmware via mixartloader utility in alsa-tools package.
857
858 Module snd-mpu401
859 -----------------
860
861 Module for MPU-401 UART devices.
862
863 port - port number or -1 (disable)
864 irq - IRQ number or -1 (disable)
865 pnp - PnP detection - 0 = disable, 1 = enable (default)
866
867 Module supports multiple devices (max 8) and PnP.
868
869 Module snd-mtpav
870 ----------------
871
872 Module for MOTU MidiTimePiece AV multiport MIDI (on the parallel
873 port).
874
875 port - I/O port # for MTPAV (0x378,0x278, default=0x378)
876 irq - IRQ # for MTPAV (7,5, default=7)
877 hwports - number of supported hardware ports, default=8.
878
879 Module supports only 1 card. This module has no enable option.
880
881 Module snd-nm256
882 ----------------
883
884 Module for NeoMagic NM256AV/ZX chips
885
886 playback_bufsize - max playback frame size in kB (4-128kB)
887 capture_bufsize - max capture frame size in kB (4-128kB)
888 force_ac97 - 0 or 1 (disabled by default)
889 buffer_top - specify buffer top address
890 use_cache - 0 or 1 (disabled by default)
891 vaio_hack - alias buffer_top=0x25a800
892 reset_workaround - enable AC97 RESET workaround for some laptops
893
894 Module supports autoprobe and multiple chips (max 8).
895
896 The power-management is supported.
897
898 Note: on some notebooks the buffer address cannot be detected
899 automatically, or causes hang-up during initialization.
900 In such a case, specify the buffer top address explicity via
901 buffer_top option.
902 For example,
903 Sony F250: buffer_top=0x25a800
904 Sony F270: buffer_top=0x272800
905 The driver supports only ac97 codec. It's possible to force
906 to initialize/use ac97 although it's not detected. In such a
907 case, use force_ac97=1 option - but *NO* guarantee whether it
908 works!
909
910 Note: The NM256 chip can be linked internally with non-AC97
911 codecs. This driver supports only the AC97 codec, and won't work
912 with machines with other (most likely CS423x or OPL3SAx) chips,
913 even though the device is detected in lspci. In such a case, try
914 other drivers, e.g. snd-cs4232 or snd-opl3sa2. Some has ISA-PnP
915 but some doesn't have ISA PnP. You'll need to speicfy isapnp=0
916 and proper hardware parameters in the case without ISA PnP.
917
918 Note: some laptops need a workaround for AC97 RESET. For the
919 known hardware like Dell Latitude LS and Sony PCG-F305, this
920 workaround is enabled automatically. For other laptops with a
921 hard freeze, you can try reset_workaround=1 option.
922
923 Note: This driver is really crappy. It's a porting from the
924 OSS driver, which is a result of black-magic reverse engineering.
925 The detection of codec will fail if the driver is loaded *after*
926 X-server as described above. You might be able to force to load
927 the module, but it may result in hang-up. Hence, make sure that
928 you load this module *before* X if you encounter this kind of
929 problem.
930
931 Module snd-opl3sa2
932 ------------------
933
934 Module for Yamaha OPL3-SA2/SA3 sound cards.
935
936 port - control port # for OPL3-SA chip (0x370)
937 sb_port - SB port # for OPL3-SA chip (0x220,0x240)
938 wss_port - WSS port # for OPL3-SA chip (0x530,0xe80,0xf40,0x604)
939 midi_port - port # for MPU-401 UART (0x300,0x330), -1 = disable
940 fm_port - FM port # for OPL3-SA chip (0x388), -1 = disable
941 irq - IRQ # for OPL3-SA chip (5,7,9,10)
942 dma1 - first DMA # for Yamaha OPL3-SA chip (0,1,3)
943 dma2 - second DMA # for Yamaha OPL3-SA chip (0,1,3), -1 = disable
944 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
945
946 Module supports up to 8 cards and ISA PnP. This module does not support
947 autoprobe (if ISA PnP is not used) thus all ports must be specified!!!
948
949 The power-management is supported.
950
951 Module snd-opti92x-ad1848
952 -------------------------
953
954 Module for sound cards based on OPTi 82c92x and Analog Devices AD1848 chips.
955 Module works with OAK Mozart cards as well.
956
957 port - port # for WSS chip (0x530,0xe80,0xf40,0x604)
958 mpu_port - port # for MPU-401 UART (0x300,0x310,0x320,0x330)
959 fm_port - port # for OPL3 device (0x388)
960 irq - IRQ # for WSS chip (5,7,9,10,11)
961 mpu_irq - IRQ # for MPU-401 UART (5,7,9,10)
962 dma1 - first DMA # for WSS chip (0,1,3)
963
964 This module supports only one card, autoprobe and PnP.
965
966 Module snd-opti92x-cs4231
967 -------------------------
968
969 Module for sound cards based on OPTi 82c92x and Crystal CS4231 chips.
970
971 port - port # for WSS chip (0x530,0xe80,0xf40,0x604)
972 mpu_port - port # for MPU-401 UART (0x300,0x310,0x320,0x330)
973 fm_port - port # for OPL3 device (0x388)
974 irq - IRQ # for WSS chip (5,7,9,10,11)
975 mpu_irq - IRQ # for MPU-401 UART (5,7,9,10)
976 dma1 - first DMA # for WSS chip (0,1,3)
977 dma2 - second DMA # for WSS chip (0,1,3)
978
979 This module supports only one card, autoprobe and PnP.
980
981 Module snd-opti93x
982 ------------------
983
984 Module for sound cards based on OPTi 82c93x chips.
985
986 port - port # for WSS chip (0x530,0xe80,0xf40,0x604)
987 mpu_port - port # for MPU-401 UART (0x300,0x310,0x320,0x330)
988 fm_port - port # for OPL3 device (0x388)
989 irq - IRQ # for WSS chip (5,7,9,10,11)
990 mpu_irq - IRQ # for MPU-401 UART (5,7,9,10)
991 dma1 - first DMA # for WSS chip (0,1,3)
992 dma2 - second DMA # for WSS chip (0,1,3)
993
994 This module supports only one card, autoprobe and PnP.
995
996 Module snd-powermac (on ppc only)
997 ---------------------------------
998
999 Module for PowerMac, iMac and iBook on-board soundchips
1000
1001 enable_beep - enable beep using PCM (enabled as default)
1002
1003 Module supports autoprobe a chip.
1004
1005 Note: the driver may have problems regarding endianess.
1006
1007 The power-management is supported.
1008
1009 Module snd-rme32
1010 ----------------
1011
1012 Module for RME Digi32, Digi32 Pro and Digi32/8 (Sek'd Prodif32,
1013 Prodif96 and Prodif Gold) sound cards.
1014
1015 Module supports up to 8 cards.
1016
1017 Module snd-rme96
1018 ----------------
1019
1020 Module for RME Digi96, Digi96/8 and Digi96/8 PRO/PAD/PST sound cards.
1021
1022 Module supports up to 8 cards.
1023
1024 Module snd-rme9652
1025 ------------------
1026
1027 Module for RME Digi9652 (Hammerfall, Hammerfall-Light) sound cards.
1028
1029 precise_ptr - Enable precise pointer (doesn't work reliably).
1030 (default = 0)
1031
1032 Module supports up to 8 cards.
1033
1034 Note: snd-page-alloc module does the job which snd-hammerfall-mem
1035 module did formerly. It will allocate the buffers in advance
1036 when any RME9652 cards are found. To make the buffer
1037 allocation sure, load snd-page-alloc module in the early
1038 stage of boot sequence.
1039
1040 Module snd-sa11xx-uda1341 (on arm only)
1041 ---------------------------------------
1042
1043 Module for Philips UDA1341TS on Compaq iPAQ H3600 sound card.
1044
1045 Module supports only one card.
1046 Module has no enable and index options.
1047
1048 Module snd-sb8
1049 --------------
1050
1051 Module for 8-bit SoundBlaster cards: SoundBlaster 1.0,
1052 SoundBlaster 2.0,
1053 SoundBlaster Pro
1054
1055 port - port # for SB DSP chip (0x220,0x240,0x260)
1056 irq - IRQ # for SB DSP chip (5,7,9,10)
1057 dma8 - DMA # for SB DSP chip (1,3)
1058
1059 Module supports up to 8 cards and autoprobe.
1060
1061 Module snd-sb16 and snd-sbawe
1062 -----------------------------
1063
1064 Module for 16-bit SoundBlaster cards: SoundBlaster 16 (PnP),
1065 SoundBlaster AWE 32 (PnP),
1066 SoundBlaster AWE 64 PnP
1067
1068 port - port # for SB DSP 4.x chip (0x220,0x240,0x260)
1069 mpu_port - port # for MPU-401 UART (0x300,0x330), -1 = disable
1070 awe_port - base port # for EMU8000 synthesizer (0x620,0x640,0x660)
1071 (snd-sbawe module only)
1072 irq - IRQ # for SB DSP 4.x chip (5,7,9,10)
1073 dma8 - 8-bit DMA # for SB DSP 4.x chip (0,1,3)
1074 dma16 - 16-bit DMA # for SB DSP 4.x chip (5,6,7)
1075 mic_agc - Mic Auto-Gain-Control - 0 = disable, 1 = enable (default)
1076 csp - ASP/CSP chip support - 0 = disable (default), 1 = enable
1077 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
1078
1079 Module supports up to 8 cards, autoprobe and ISA PnP.
1080
1081 Note: To use Vibra16X cards in 16-bit half duplex mode, you must
1082 disable 16bit DMA with dma16 = -1 module parameter.
1083 Also, all Sound Blaster 16 type cards can operate in 16-bit
1084 half duplex mode through 8-bit DMA channel by disabling their
1085 16-bit DMA channel.
1086
1087 Module snd-sgalaxy
1088 ------------------
1089
1090 Module for Aztech Sound Galaxy sound card.
1091
1092 sbport - Port # for SB16 interface (0x220,0x240)
1093 wssport - Port # for WSS interface (0x530,0xe80,0xf40,0x604)
1094 irq - IRQ # (7,9,10,11)
1095 dma1 - DMA #
1096
1097 Module supports up to 8 cards.
1098
1099 Module snd-sscape
1100 -----------------
1101
1102 Module for ENSONIQ SoundScape PnP cards.
1103
1104 port - Port # (PnP setup)
1105 irq - IRQ # (PnP setup)
1106 mpu_irq - MPU-401 IRQ # (PnP setup)
1107 dma - DMA # (PnP setup)
1108
1109 Module supports up to 8 cards. ISA PnP must be enabled.
1110 You need sscape_ctl tool in alsa-tools package for loading
1111 the microcode.
1112
1113 Module snd-sun-amd7930 (on sparc only)
1114 --------------------------------------
1115
1116 Module for AMD7930 sound chips found on Sparcs.
1117
1118 Module supports up to 8 cards.
1119
1120 Module snd-sun-cs4231 (on sparc only)
1121 -------------------------------------
1122
1123 Module for CS4231 sound chips found on Sparcs.
1124
1125 Module supports up to 8 cards.
1126
1127 Module snd-wavefront
1128 --------------------
1129
1130 Module for Turtle Beach Maui, Tropez and Tropez+ sound cards.
1131
1132 cs4232_pcm_port - Port # for CS4232 PCM interface.
1133 cs4232_pcm_irq - IRQ # for CS4232 PCM interface (5,7,9,11,12,15).
1134 cs4232_mpu_port - Port # for CS4232 MPU-401 interface.
1135 cs4232_mpu_irq - IRQ # for CS4232 MPU-401 interface (9,11,12,15).
1136 use_cs4232_midi - Use CS4232 MPU-401 interface
1137 (inaccessibly located inside your computer)
1138 ics2115_port - Port # for ICS2115
1139 ics2115_irq - IRQ # for ICS2115
1140 fm_port - FM OPL-3 Port #
1141 dma1 - DMA1 # for CS4232 PCM interface.
1142 dma2 - DMA2 # for CS4232 PCM interface.
1143 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
1144
1145 Module supports up to 8 cards and ISA PnP.
1146
1147 Module snd-sonicvibes
1148 ---------------------
1149
1150 Module for S3 SonicVibes PCI sound cards.
1151 * PINE Schubert 32 PCI
1152
1153 reverb - Reverb Enable - 1 = enable, 0 = disable (default)
1154 - SoundCard must have onboard SRAM for this.
1155 mge - Mic Gain Enable - 1 = enable, 0 = disable (default)
1156
1157 Module supports up to 8 cards and autoprobe.
1158
1159 Module snd-serial-u16550
1160 ------------------------
1161
1162 Module for UART16550A serial MIDI ports.
1163
1164 port - port # for UART16550A chip
1165 irq - IRQ # for UART16550A chip, -1 = poll mode
1166 speed - speed in bauds (9600,19200,38400,57600,115200)
1167 38400 = default
1168 base - base for divisor in bauds (57600,115200,230400,460800)
1169 115200 = default
1170 outs - number of MIDI ports in a serial port (1-4)
1171 1 = default
1172 adaptor - Type of adaptor.
1173 0 = Soundcanvas, 1 = MS-124T, 2 = MS-124W S/A,
1174 3 = MS-124W M/B, 4 = Generic
1175
1176 Module supports up to 8 cards. This module does not support autoprobe
1177 thus the main port must be specified!!! Other options are optional.
1178
1179 Module snd-trident
1180 ------------------
1181
1182 Module for Trident 4DWave DX/NX sound cards.
1183 * Best Union Miss Melody 4DWave PCI
1184 * HIS 4DWave PCI
1185 * Warpspeed ONSpeed 4DWave PCI
1186 * AzTech PCI 64-Q3D
1187 * Addonics SV 750
1188 * CHIC True Sound 4Dwave
1189 * Shark Predator4D-PCI
1190 * Jaton SonicWave 4D
1191
1192 pcm_channels - max channels (voices) reserved for PCM
1193 wavetable_size - max wavetable size in kB (4-?kb)
1194
1195 Module supports up to 8 cards and autoprobe.
1196
1197 The power-management is supported.
1198
1199 Module snd-usb-audio
1200 --------------------
1201
1202 Module for USB audio and USB MIDI devices.
1203
1204 vid - Vendor ID for the device (optional)
1205 pid - Product ID for the device (optional)
1206
1207 This module supports up to 8 cards, autoprobe and hotplugging.
1208
1209 Module snd-usb-usx2y
1210 --------------------
1211
1212 Module for Tascam USB US-122, US-224 and US-428 devices.
1213
1214 This module supports up to 8 cards, autoprobe and hotplugging.
1215
1216 Note: you need to load the firmware via usx2yloader utility included
1217 in alsa-tools and alsa-firmware packages.
1218
1219 Module snd-via82xx
1220 ------------------
1221
1222 Module for AC'97 motherboards based on VIA 82C686A/686B, 8233,
2d7eb7cb 1223 8233A, 8233C, 8235, 8237 (south) bridge.
1da177e4
LT		 1224
1225 mpu_port - 0x300,0x310,0x320,0x330, otherwise obtain BIOS setup
1226 [VIA686A/686B only]
1227 joystick - Enable joystick (default off) [VIA686A/686B only]
1228 ac97_clock - AC'97 codec clock base (default 48000Hz)
1229 dxs_support - support DXS channels,
2d7eb7cb
SV		 1230 0 = auto (default), 1 = enable, 2 = disable,
1231 3 = 48k only, 4 = no VRA, 5 = enable any sample
1232 rate and different sample rates on different
1233 channels
1234 [VIA8233/C, 8235, 8237 only]
1da177e4
LT		 1235 ac97_quirk - AC'97 workaround for strange hardware
1236 See the description of intel8x0 module for details.
1237
1238 Module supports autoprobe and multiple bus-master chips (max 8).
1239
1240 Note: on some SMP motherboards like MSI 694D the interrupts might
1241 not be generated properly. In such a case, please try to
1242 set the SMP (or MPS) version on BIOS to 1.1 instead of
1243 default value 1.4. Then the interrupt number will be
1244 assigned under 15. You might also upgrade your BIOS.
1245
2d7eb7cb 1246 Note: VIA8233/5/7 (not VIA8233A) can support DXS (direct sound)
1da177e4 1247 channels as the first PCM. On these channels, up to 4
2d7eb7cb
SV		 1248 streams can be played at the same time, and the controller
1249 can perform sample rate conversion with separate rates for
1250 each channel.
1da177e4
LT		 1251 As default (dxs_support = 0), 48k fixed rate is chosen
1252 except for the known devices since the output is often
1253 noisy except for 48k on some mother boards due to the
1254 bug of BIOS.
2d7eb7cb 1255 Please try once dxs_support=5 and if it works on other
1da177e4
LT		 1256 sample rates (e.g. 44.1kHz of mp3 playback), please let us
1257 know the PCI subsystem vendor/device id's (output of
1258 "lspci -nv").
2d7eb7cb
SV		 1259 If dxs_support=5 does not work, try dxs_support=1; if it
1260 doesn't work too, try dxs_support=4. If it still doesn't
1da177e4
LT		 1261 work and the default setting is ok, dxs_support=3 is the
1262 right choice. If the default setting doesn't work at all,
1263 try dxs_support=2 to disable the DXS channels.
1264 In any cases, please let us know the result and the
1265 subsystem vendor/device ids.
1266
1267 Note: for the MPU401 on VIA823x, use snd-mpu401 driver
1268 additonally. The mpu_port option is for VIA686 chips only.
1269
1270 Module snd-via82xx-modem
1271 ------------------------
1272
1273 Module for VIA82xx AC97 modem
1274
1275 ac97_clock - AC'97 codec clock base (default 48000Hz)
1276
1277 Module supports up to 8 cards.
1278
1279 Note: The default index value of this module is -2, i.e. the first
1280 slot is excluded.
1281
1282 Module snd-virmidi
1283 ------------------
1284
1285 Module for virtual rawmidi devices.
1286 This module creates virtual rawmidi devices which communicate
1287 to the corresponding ALSA sequencer ports.
1288
1289 midi_devs - MIDI devices # (1-8, default=4)
1290
1291 Module supports up to 8 cards.
1292
1293 Module snd-vx222
1294 ----------------
1295
1296 Module for Digigram VX-Pocket VX222, V222 v2 and Mic cards.
1297
1298 mic - Enable Microphone on V222 Mic (NYI)
1299 ibl - Capture IBL size. (default = 0, minimum size)
1300
1301 Module supports up to 8 cards.
1302
1303 When the driver is compiled as a module and the hotplug firmware
1304 is supported, the firmware data is loaded via hotplug automatically.
1305 Install the necessary firmware files in alsa-firmware package.
1306 When no hotplug fw loader is available, you need to load the
1307 firmware via vxloader utility in alsa-tools package. To invoke
1308 vxloader automatically, add the following to /etc/modprobe.conf
1309
1310 install snd-vx222 /sbin/modprobe --first-time -i snd-vx222 && /usr/bin/vxloader
1311
1312 (for 2.2/2.4 kernels, add "post-install /usr/bin/vxloader" to
1313 /etc/modules.conf, instead.)
1314 IBL size defines the interrupts period for PCM. The smaller size
1315 gives smaller latency but leads to more CPU consumption, too.
1316 The size is usually aligned to 126. As default (=0), the smallest
1317 size is chosen. The possible IBL values can be found in
1318 /proc/asound/cardX/vx-status proc file.
1319
1320 Module snd-vxpocket
1321 -------------------
1322
1323 Module for Digigram VX-Pocket VX2 PCMCIA card.
1324
1325 ibl - Capture IBL size. (default = 0, minimum size)
1326
1327 Module supports up to 8 cards. The module is compiled only when
1328 PCMCIA is supported on kernel.
1329
1330 To activate the driver via the card manager, you'll need to set
1331 up /etc/pcmcia/vxpocket.conf. See the sound/pcmcia/vx/vxpocket.c.
1332
1333 When the driver is compiled as a module and the hotplug firmware
1334 is supported, the firmware data is loaded via hotplug automatically.
1335 Install the necessary firmware files in alsa-firmware package.
1336 When no hotplug fw loader is available, you need to load the
1337 firmware via vxloader utility in alsa-tools package.
1338
1339 About capture IBL, see the description of snd-vx222 module.
1340
1341 Note: the driver is build only when CONFIG_ISA is set.
1342
1343 Module snd-vxp440
1344 -----------------
1345
1346 Module for Digigram VX-Pocket 440 PCMCIA card.
1347
1348 ibl - Capture IBL size. (default = 0, minimum size)
1349
1350 Module supports up to 8 cards. The module is compiled only when
1351 PCMCIA is supported on kernel.
1352
1353 To activate the driver via the card manager, you'll need to set
1354 up /etc/pcmcia/vxp440.conf. See the sound/pcmcia/vx/vxp440.c.
1355
1356 When the driver is compiled as a module and the hotplug firmware
1357 is supported, the firmware data is loaded via hotplug automatically.
1358 Install the necessary firmware files in alsa-firmware package.
1359 When no hotplug fw loader is available, you need to load the
1360 firmware via vxloader utility in alsa-tools package.
1361
1362 About capture IBL, see the description of snd-vx222 module.
1363
1364 Note: the driver is build only when CONFIG_ISA is set.
1365
1366 Module snd-ymfpci
1367 -----------------
1368
1369 Module for Yamaha PCI chips (YMF72x, YMF74x & YMF75x).
1370
1371 mpu_port - 0x300,0x330,0x332,0x334, 0 (disable) by default,
1372 1 (auto-detect for YMF744/754 only)
1373 fm_port - 0x388,0x398,0x3a0,0x3a8, 0 (disable) by default
1374 1 (auto-detect for YMF744/754 only)
1375 joystick_port - 0x201,0x202,0x204,0x205, 0 (disable) by default,
1376 1 (auto-detect)
1377 rear_switch - enable shared rear/line-in switch (bool)
1378
1379 Module supports autoprobe and multiple chips (max 8).
1380
1381 The power-management is supported.
1382
1383 Module snd-pdaudiocf
1384 --------------------
1385
1386 Module for Sound Core PDAudioCF sound card.
1387
1388 Note: the driver is build only when CONFIG_ISA is set.
1389
1390
1391Configuring Non-ISAPNP Cards
1392============================
1393
1394When the kernel is configured with ISA-PnP support, the modules
1395supporting the isapnp cards will have module options "isapnp".
1396If this option is set, *only* the ISA-PnP devices will be probed.
1397For probing the non ISA-PnP cards, you have to pass "isapnp=0" option
1398together with the proper i/o and irq configuration.
1399
1400When the kernel is configured without ISA-PnP support, isapnp option
1401will be not built in.
1402
1403
1404Module Autoloading Support
1405==========================
1406
1407The ALSA drivers can be loaded automatically on demand by defining
1408module aliases. The string 'snd-card-%1' is requested for ALSA native
1409devices where %i is sound card number from zero to seven.
1410
1411To auto-load an ALSA driver for OSS services, define the string
1412'sound-slot-%i' where %i means the slot number for OSS, which
1413corresponds to the card index of ALSA. Usually, define this
1414as the the same card module.
1415
1416An example configuration for a single emu10k1 card is like below:
1417----- /etc/modprobe.conf
1418alias snd-card-0 snd-emu10k1
1419alias sound-slot-0 snd-emu10k1
1420----- /etc/modprobe.conf
1421
1422The available number of auto-loaded sound cards depends on the module
1423option "cards_limit" of snd module. As default it's set to 1.
1424To enable the auto-loading of multiple cards, specify the number of
1425sound cards in that option.
1426
1427When multiple cards are available, it'd better to specify the index
1428number for each card via module option, too, so that the order of
1429cards is kept consistent.
1430
1431An example configuration for two sound cards is like below:
1432
1433----- /etc/modprobe.conf
1434# ALSA portion
1435options snd cards_limit=2
1436alias snd-card-0 snd-interwave
1437alias snd-card-1 snd-ens1371
1438options snd-interwave index=0
1439options snd-ens1371 index=1
1440# OSS/Free portion
1441alias sound-slot-0 snd-interwave
1442alias sound-slot-1 snd-ens1371
1443----- /etc/moprobe.conf
1444
1445In this example, the interwave card is always loaded as the first card
1446(index 0) and ens1371 as the second (index 1).
1447
1448
1449ALSA PCM devices to OSS devices mapping
1450=======================================
1451
1452/dev/snd/pcmC0D0[c|p] -> /dev/audio0 (/dev/audio) -> minor 4
1453/dev/snd/pcmC0D0[c|p] -> /dev/dsp0 (/dev/dsp) -> minor 3
1454/dev/snd/pcmC0D1[c|p] -> /dev/adsp0 (/dev/adsp) -> minor 12
1455/dev/snd/pcmC1D0[c|p] -> /dev/audio1 -> minor 4+16 = 20
1456/dev/snd/pcmC1D0[c|p] -> /dev/dsp1 -> minor 3+16 = 19
1457/dev/snd/pcmC1D1[c|p] -> /dev/adsp1 -> minor 12+16 = 28
1458/dev/snd/pcmC2D0[c|p] -> /dev/audio2 -> minor 4+32 = 36
1459/dev/snd/pcmC2D0[c|p] -> /dev/dsp2 -> minor 3+32 = 39
1460/dev/snd/pcmC2D1[c|p] -> /dev/adsp2 -> minor 12+32 = 44
1461
1462The first number from /dev/snd/pcmC{X}D{Y}[c|p] expression means
1463sound card number and second means device number. The ALSA devices
1464have either 'c' or 'p' suffix indicating the direction, capture and
1465playback, respectively.
1466
1467Please note that the device mapping above may be varied via the module
1468options of snd-pcm-oss module.
1469
1470
1471DEVFS support
1472=============
1473
1474The ALSA driver fully supports the devfs extension.
1475You should add lines below to your devfsd.conf file:
1476
1477LOOKUP snd MODLOAD ACTION snd
1478REGISTER ^sound/.* PERMISSIONS root.audio 660
1479REGISTER ^snd/.* PERMISSIONS root.audio 660
1480
1481Warning: These lines assume that you have the audio group in your system.
1482 Otherwise replace audio word with another group name (root for
1483 example).
1484
1485
1486Proc interfaces (/proc/asound)
1487==============================
1488
1489/proc/asound/card#/pcm#[cp]/oss
1490-------------------------------
1491 String "erase" - erase all additional informations about OSS applications
1492 String "<app_name> <fragments> <fragment_size> [<options>]"
1493
1494 <app_name> - name of application with (higher priority) or without path
1495 <fragments> - number of fragments or zero if auto
1496 <fragment_size> - size of fragment in bytes or zero if auto
1497 <options> - optional parameters
1498 - disable the application tries to open a pcm device for
1499 this channel but does not want to use it.
1500 (Cause a bug or mmap needs)
1501 It's good for Quake etc...
1502 - direct don't use plugins
1503 - block force block mode (rvplayer)
1504 - non-block force non-block mode
1505 - whole-frag write only whole fragments (optimization affecting
1506 playback only)
1507 - no-silence do not fill silence ahead to avoid clicks
1508
1509 Example: echo "x11amp 128 16384" > /proc/asound/card0/pcm0p/oss
1510 echo "squake 0 0 disable" > /proc/asound/card0/pcm0c/oss
1511 echo "rvplayer 0 0 block" > /proc/asound/card0/pcm0p/oss
1512
1513
1514Links
1515=====
1516
1517 ALSA project homepage
1518 http://www.alsa-project.org
1519
kernel source for telekom puls (alcatel/mediatek)