diff options
Diffstat (limited to 'Documentation/sound')
| -rw-r--r-- | Documentation/sound/oss/AD1816 | 84 | ||||
| -rw-r--r-- | Documentation/sound/oss/NM256 | 280 | ||||
| -rw-r--r-- | Documentation/sound/oss/OPL3-SA2 | 210 | ||||
| -rw-r--r-- | Documentation/sound/oss/VIA-chipset | 43 | ||||
| -rw-r--r-- | Documentation/sound/oss/cs46xx | 138 |
5 files changed, 0 insertions, 755 deletions
diff --git a/Documentation/sound/oss/AD1816 b/Documentation/sound/oss/AD1816 deleted file mode 100644 index 14bd8f25d523..000000000000 --- a/Documentation/sound/oss/AD1816 +++ /dev/null @@ -1,84 +0,0 @@ -Documentation for the AD1816(A) sound driver -============================================ - -Installation: -------------- - -To get your AD1816(A) based sound card work, you'll have to enable support for -experimental code ("Prompt for development and/or incomplete code/drivers") -and isapnp ("Plug and Play support", "ISA Plug and Play support"). Enable -"Sound card support", "OSS modules support" and "Support for AD1816(A) based -cards (EXPERIMENTAL)" in the sound configuration menu, too. Now build, install -and reboot the new kernel as usual. - -Features: ---------- - -List of features supported by this driver: -- full-duplex support -- supported audio formats: unsigned 8bit, signed 16bit little endian, - signed 16bit big endian, µ-law, A-law -- supported channels: mono and stereo -- supported recording sources: Master, CD, Line, Line1, Line2, Mic -- supports phat 3d stereo circuit (Line 3) - - -Supported cards: ----------------- - -The following cards are known to work with this driver: -- Terratec Base 1 -- Terratec Base 64 -- HP Kayak -- Acer FX-3D -- SY-1816 -- Highscreen Sound-Boostar 32 Wave 3D -- Highscreen Sound-Boostar 16 -- AVM Apex Pro card -- (Aztech SC-16 3D) -- (Newcom SC-16 3D) -- (Terratec EWS64S) - -Cards listed in brackets are not supported reliable. If you have such a card -you should add the extra parameter: - options=1 -when loading the ad1816 module via modprobe. - - -Troubleshooting: ----------------- - -First of all you should check, if the driver has been loaded -properly. - -If loading of the driver succeeds, but playback/capture fails, check -if you used the correct values for irq, dma and dma2 when loading the module. -If one of them is wrong you usually get the following error message: - -Nov 6 17:06:13 tek01 kernel: Sound: DMA (output) timed out - IRQ/DRQ config error? - -If playback/capture is too fast or to slow, you should have a look at -the clock chip of your sound card. The AD1816 was designed for a 33MHz -oscillator, however most sound card manufacturer use slightly -different oscillators as they are cheaper than 33MHz oscillators. If -you have such a card you have to adjust the ad1816_clockfreq parameter -above. For example: For a card using a 32.875MHz oscillator use -ad1816_clockfreq=32875 instead of ad1816_clockfreq=33000. - - -Updates, bugfixes and bugreports: --------------------------------- - -As the driver is still experimental and under development, you should -watch out for updates. Updates of the driver are available on the -Internet from one of my home pages: - http://www.student.informatik.tu-darmstadt.de/~tek/projects/linux.html -or: - http://www.tu-darmstadt.de/~tek01/projects/linux.html - -Bugreports, bugfixes and related questions should be sent via E-Mail to: - tek@rbg.informatik.tu-darmstadt.de - -Thorsten Knabe <tek@rbg.informatik.tu-darmstadt.de> -Christoph Hellwig <hch@infradead.org> - Last modified: 2000/09/20 diff --git a/Documentation/sound/oss/NM256 b/Documentation/sound/oss/NM256 deleted file mode 100644 index b503217488b3..000000000000 --- a/Documentation/sound/oss/NM256 +++ /dev/null @@ -1,280 +0,0 @@ -======================================================= -Documentation for the NeoMagic 256AV/256ZX sound driver -======================================================= - -You're looking at version 1.1 of the driver. (Woohoo!) It has been -successfully tested against the following laptop models: - - Sony Z505S/Z505SX/Z505DX/Z505RX - Sony F150, F160, F180, F250, F270, F280, PCG-F26 - Dell Latitude CPi, CPt (various submodels) - -There are a few caveats, which is why you should read the entirety of -this document first. - -This driver was developed without any support or assistance from -NeoMagic. There is no warranty, expressed, implied, or otherwise. It -is free software in the public domain; feel free to use it, sell it, -give it to your best friends, even claim that you wrote it (but why?!) -but don't go whining to me, NeoMagic, Sony, Dell, or anyone else -when it blows up your computer. - -Version 1.1 contains a change to try and detect non-AC97 versions of -the hardware, and not install itself appropriately. It should also -reinitialize the hardware on an APM resume event, assuming that APM -was configured into your kernel. - -============ -Installation -============ - -Enable the sound drivers, the OSS sound drivers, and then the NM256 -driver. The NM256 driver *must* be configured as a module (it won't -give you any other choice). - -Next, do the usual "make modules" and "make modules_install". -Finally, insmod the soundcore, sound and nm256 modules. - -When the nm256 driver module is loaded, you should see a couple of -confirmation messages in the kernel logfile indicating that it found -the device (the device does *not* use any I/O ports or DMA channels). -Now try playing a wav file, futz with the CD-ROM if you have one, etc. - -The NM256 is entirely a PCI-based device, and all the necessary -information is automatically obtained from the card. It can only be -configured as a module in a vain attempt to prevent people from -hurting themselves. It works correctly if it shares an IRQ with -another device (it normally shares IRQ 9 with the builtin eepro100 -ethernet on the Sony Z505 laptops). - -It does not run the card in any sort of compatibility mode. It will -not work on laptops that have the SB16-compatible, AD1848-compatible -or CS4232-compatible codec/mixer; you will want to use the appropriate -compatible OSS driver with these chipsets. I cannot provide any -assistance with machines using the SB16, AD1848 or CS4232 compatible -versions. (The driver now attempts to detect the mixer version, and -will refuse to load if it believes the hardware is not -AC97-compatible.) - -The sound support is very basic, but it does include simultaneous -playback and record capability. The mixer support is also quite -simple, although this is in keeping with the rather limited -functionality of the chipset. - -There is no hardware synthesizer available, as the Losedows OPL-3 and -MIDI support is done via hardware emulation. - -Only three recording devices are available on the Sony: the -microphone, the CD-ROM input, and the volume device (which corresponds -to the stereo output). (Other devices may be available on other -models of laptops.) The Z505 series does not have a builtin CD-ROM, -so of course the CD-ROM input doesn't work. It does work on laptops -with a builtin CD-ROM drive. - -The mixer device does not appear to have any tone controls, at least -on the Z505 series. The mixer module checks for tone controls in the -AC97 mixer, and will enable them if they are available. - -============== -Known problems -============== - - * There are known problems with PCMCIA cards and the eepro100 ethernet - driver on the Z505S/Z505SX/Z505DX. Keep reading. - - * There are also potential problems with using a virtual X display, and - also problems loading the module after the X server has been started. - Keep reading. - - * The volume control isn't anywhere near linear. Sorry. This will be - fixed eventually, when I get sufficiently annoyed with it. (I doubt - it will ever be fixed now, since I've never gotten sufficiently - annoyed with it and nobody else seems to care.) - - * There are reports that the CD-ROM volume is very low. Since I do not - have a CD-ROM equipped laptop, I cannot test this (it's kinda hard to - do remotely). - - * Only 8 fixed-rate speeds are supported. This is mainly a chipset - limitation. It may be possible to support other speeds in the future. - - * There is no support for the telephone mixer/codec. There is support - for a phonein/phoneout device in the mixer driver; whether or not - it does anything is anyone's guess. (Reports on this would be - appreciated. You'll have to figure out how to get the phone to - go off-hook before it'll work, tho.) - - * This driver was not written with any cooperation or support from - NeoMagic. If you have any questions about this, see their website - for their official stance on supporting open source drivers. - -============ -Video memory -============ - -The NeoMagic sound engine uses a portion of the display memory to hold -the sound buffer. (Crazy, eh?) The NeoMagic video BIOS sets up a -special pointer at the top of video RAM to indicate where the top of -the audio buffer should be placed. - -At the present time XFree86 is apparently not aware of this. It will -thus write over either the pointer or the sound buffer with abandon. -(Accelerated-X seems to do a better job here.) - -This implies a few things: - - * Sometimes the NM256 driver has to guess at where the buffer - should be placed, especially if the module is loaded after the - X server is started. It's usually correct, but it will consistently - fail on the Sony F250. - - * Virtual screens greater than 1024x768x16 under XFree86 are - problematic on laptops with only 2.5MB of screen RAM. This - includes all of the 256AV-equipped laptops. (Virtual displays - may or may not work on the 256ZX, which has at least 4MB of - video RAM.) - -If you start having problems with random noise being output either -constantly (this is the usual symptom on the F250), or when windows -are moved around (this is the usual symptom when using a virtual -screen), the best fix is to - - * Don't use a virtual frame buffer. - * Make sure you load the NM256 module before the X server is - started. - -On the F250, it is possible to force the driver to load properly even -after the XFree86 server is started by doing: - - insmod nm256 buffertop=0x25a800 - -This forces the audio buffers to the correct offset in screen RAM. - -One user has reported a similar problem on the Sony F270, although -others apparently aren't seeing any problems. His suggested command -is - - insmod nm256 buffertop=0x272800 - -================= -Official WWW site -================= - -The official site for the NM256 driver is: - - http://www.uglx.org/sony.html - -You should always be able to get the latest version of the driver there, -and the driver will be supported for the foreseeable future. - -============== -Z505RX and IDE -============== - -There appears to be a problem with the IDE chipset on the Z505RX; one -of the symptoms is that sound playback periodically hangs (when the -disk is accessed). The user reporting the problem also reported that -enabling all of the IDE chipset workarounds in the kernel solved the -problem, tho obviously only one of them should be needed--if someone -can give me more details I would appreciate it. - -============================== -Z505S/Z505SX on-board Ethernet -============================== - -If you're using the on-board Ethernet Pro/100 ethernet support on the Z505 -series, I strongly encourage you to download the latest eepro100 driver from -Donald Becker's site: - - ftp://cesdis.gsfc.nasa.gov/pub/linux/drivers/test/eepro100.c - -There was a reported problem on the Z505SX that if the ethernet -interface is disabled and reenabled while the sound driver is loaded, -the machine would lock up. I have included a workaround that is -working satisfactorily. However, you may occasionally see a message -about "Releasing interrupts, over 1000 bad interrupts" which indicates -that the workaround is doing its job. - -================================== -PCMCIA and the Z505S/Z505SX/Z505DX -================================== - -There is also a known problem with the Sony Z505S and Z505SX hanging -if a PCMCIA card is inserted while the ethernet driver is loaded, or -in some cases if the laptop is suspended. This is caused by tons of -spurious IRQ 9s, probably generated from the PCMCIA or ACPI bridges. - -There is currently no fix for the problem that works in every case. -The only known workarounds are to disable the ethernet interface -before inserting or removing a PCMCIA card, or with some cards -disabling the PCMCIA card before ejecting it will also help the -problem with the laptop hanging when the card is ejected. - -One user has reported that setting the tcic's cs_irq to some value -other than 9 (like 11) fixed the problem. This doesn't work on my -Z505S, however--changing the value causes the cardmgr to stop seeing -card insertions and removals, cards don't seem to work correctly, and -I still get hangs if a card is inserted when the kernel is booted. - -Using the latest ethernet driver and pcmcia package allows me to -insert an Adaptec 1480A SlimScsi card without the laptop hanging, -although I still have to shut down the card before ejecting or -powering down the laptop. However, similar experiments with a DE-660 -ethernet card still result in hangs when the card is inserted. I am -beginning to think that the interrupts are CardBus-related, since the -Adaptec card is a CardBus card, and the DE-660 is not; however, I -don't have any other CardBus cards to test with. - -====== -Thanks -====== - -First, I want to thank everyone (except NeoMagic of course) for their -generous support and encouragement. I'd like to list everyone's name -here that replied during the development phase, but the list is -amazingly long. - -I will be rather unfair and single out a few people, however: - - Justin Maurer, for being the first random net.person to try it, - and for letting me login to his Z505SX to get it working there - - Edi Weitz for trying out several different versions, and giving - me a lot of useful feedback - - Greg Rumple for letting me login remotely to get the driver - functional on the 256ZX, for his assistance on tracking - down all sorts of random stuff, and for trying out Accel-X - - Zach Brown, for the initial AC97 mixer interface design - - Jeff Garzik, for various helpful suggestions on the AC97 - interface - - "Mr. Bumpy" for feedback on the Z505RX - - Bill Nottingham, for generous assistance in getting the mixer ID - code working - -================= -Previous versions -================= - -Versions prior to 0.3 (aka `noname') had problems with weird artifacts -in the output and failed to set the recording rate properly. These -problems have long since been fixed. - -Versions prior to 0.5 had problems with clicks in the output when -anything other than 16-bit stereo sound was being played, and also had -periodic clicks when recording. - -Version 0.7 first incorporated support for the NM256ZX chipset, which -is found on some Dell Latitude laptops (the CPt, and apparently -some CPi models as well). It also included the generic AC97 -mixer module. - -Version 0.75 renamed all the functions and files with slightly more -generic names. - -Note that previous versions of this document claimed that recording was -8-bit only; it actually has been working for 16-bits all along. diff --git a/Documentation/sound/oss/OPL3-SA2 b/Documentation/sound/oss/OPL3-SA2 deleted file mode 100644 index d8b6d2bbada6..000000000000 --- a/Documentation/sound/oss/OPL3-SA2 +++ /dev/null @@ -1,210 +0,0 @@ -Documentation for the OPL3-SA2, SA3, and SAx driver (opl3sa2.o) ---------------------------------------------------------------- - -Scott Murray, scott@spiteful.org -January 7, 2001 - -NOTE: All trade-marked terms mentioned below are properties of their - respective owners. - - -Supported Devices ------------------ - -This driver is for PnP soundcards based on the following Yamaha audio -controller chipsets: - -YMF711 aka OPL3-SA2 -YMF715 and YMF719 aka OPL3-SA3 - -Up until recently (December 2000), I'd thought the 719 to be a -different chipset, the OPL3-SAx. After an email exhange with -Yamaha, however, it turns out that the 719 is just a re-badged -715, and the chipsets are identical. The chipset detection code -has been updated to reflect this. - -Anyways, all of these chipsets implement the following devices: - -OPL3 FM synthesizer -Soundblaster Pro -Microsoft/Windows Sound System -MPU401 MIDI interface - -Note that this driver uses the MSS device, and to my knowledge these -chipsets enforce an either/or situation with the Soundblaster Pro -device and the MSS device. Since the MSS device has better -capabilities, I have implemented the driver to use it. - - -Mixer Channels --------------- - -Older versions of this driver (pre-December 2000) had two mixers, -an OPL3-SA2 or SA3 mixer and a MSS mixer. The OPL3-SA[23] mixer -device contained a superset of mixer channels consisting of its own -channels and all of the MSS mixer channels. To simplify the driver -considerably, and to partition functionality better, the OPL3-SA[23] -mixer device now contains has its own specific mixer channels. They -are: - -Volume - Hardware master volume control -Bass - SA3 only, now supports left and right channels -Treble - SA3 only, now supports left and right channels -Microphone - Hardware microphone input volume control -Digital1 - Yamaha 3D enhancement "Wide" mixer - -All other mixer channels (e.g. "PCM", "CD", etc.) now have to be -controlled via the "MS Sound System (CS4231)" mixer. To facilitate -this, the mixer device creation order has been switched so that -the MSS mixer is created first. This allows accessing the majority -of the useful mixer channels even via single mixer-aware tools -such as "aumix". - - -Plug 'n Play ------------- - -In previous kernels (2.2.x), some configuration was required to -get the driver to talk to the card. Being the new millennium and -all, the 2.4.x kernels now support auto-configuration if ISA PnP -support is configured in. Theoretically, the driver even supports -having more than one card in this case. - -With the addition of PnP support to the driver, two new parameters -have been added to control it: - -isapnp - set to 0 to disable ISA PnP card detection - -multiple - set to 0 to disable multiple PnP card detection - - -Optional Parameters -------------------- - -Recent (December 2000) additions to the driver (based on a patch -provided by Peter Englmaier) are two new parameters: - -ymode - Set Yamaha 3D enhancement mode: - 0 = Desktop/Normal 5-12 cm speakers - 1 = Notebook PC (1) 3 cm speakers - 2 = Notebook PC (2) 1.5 cm speakers - 3 = Hi-Fi 16-38 cm speakers - -loopback - Set A/D input source. Useful for echo cancellation: - 0 = Mic Right channel (default) - 1 = Mono output loopback - -The ymode parameter has been tested and does work. The loopback -parameter, however, is untested. Any feedback on its usefulness -would be appreciated. - - -Manual Configuration --------------------- - -If for some reason you decide not to compile ISA PnP support into -your kernel, or disabled the driver's usage of it by setting the -isapnp parameter as discussed above, then you will need to do some -manual configuration. There are two ways of doing this. The most -common is to use the isapnptools package to initialize the card, and -use the kernel module form of the sound subsystem and sound drivers. -Alternatively, some BIOS's allow manual configuration of installed -PnP devices in a BIOS menu, which should allow using the non-modular -sound drivers, i.e. built into the kernel. - -I personally use isapnp and modules, and do not have access to a PnP -BIOS machine to test. If you have such a beast, configuring the -driver to be built into the kernel should just work (thanks to work -done by David Luyer <luyer@ucs.uwa.edu.au>). You will still need -to specify settings, which can be done by adding: - -opl3sa2=<io>,<irq>,<dma>,<dma2>,<mssio>,<mpuio> - -to the kernel command line. For example: - -opl3sa2=0x370,5,0,1,0x530,0x330 - -If you are instead using the isapnp tools (as most people have been -before Linux 2.4.x), follow the directions in their documentation to -produce a configuration file. Here is the relevant excerpt I used to -use for my SA3 card from my isapnp.conf: - -(CONFIGURE YMH0800/-1 (LD 0 - -# NOTE: IO 0 is for the unused SoundBlaster part of the chipset. -(IO 0 (BASE 0x0220)) -(IO 1 (BASE 0x0530)) -(IO 2 (BASE 0x0388)) -(IO 3 (BASE 0x0330)) -(IO 4 (BASE 0x0370)) -(INT 0 (IRQ 5 (MODE +E))) -(DMA 0 (CHANNEL 0)) -(DMA 1 (CHANNEL 1)) - -Here, note that: - -Port Acceptable Range Purpose ----- ---------------- ------- -IO 0 0x0220 - 0x0280 SB base address, unused. -IO 1 0x0530 - 0x0F48 MSS base address -IO 2 0x0388 - 0x03F8 OPL3 base address -IO 3 0x0300 - 0x0334 MPU base address -IO 4 0x0100 - 0x0FFE card's own base address for its control I/O ports - -The IRQ and DMA values can be any that are considered acceptable for a -MSS. Assuming you've got isapnp all happy, then you should be able to -do something like the following (which matches up with the isapnp -configuration above): - -modprobe mpu401 -modprobe ad1848 -modprobe opl3sa2 io=0x370 mss_io=0x530 mpu_io=0x330 irq=5 dma=0 dma2=1 -modprobe opl3 io=0x388 - -See the section "Automatic Module Loading" below for how to set up -/etc/modprobe.conf to automate this. - -An important thing to remember that the opl3sa2 module's io argument is -for it's own control port, which handles the card's master mixer for -volume (on all cards), and bass and treble (on SA3 cards). - - -Troubleshooting ---------------- - -If all goes well and you see no error messages, you should be able to -start using the sound capabilities of your system. If you get an -error message while trying to insert the opl3sa2 module, then make -sure that the values of the various arguments match what you specified -in your isapnp configuration file, and that there is no conflict with -another device for an I/O port or interrupt. Checking the contents of -/proc/ioports and /proc/interrupts can be useful to see if you're -butting heads with another device. - -If you still cannot get the module to load, look at the contents of -your system log file, usually /var/log/messages. If you see the -message "opl3sa2: Unknown Yamaha audio controller version", then you -have a different chipset version than I've encountered so far. Look -for all messages in the log file that start with "opl3sa2: " and see -if they provide any clues. If you do not see the chipset version -message, and none of the other messages present in the system log are -helpful, email me some details and I'll try my best to help. - - -Automatic Module Loading ------------------------- - -Lastly, if you're using modules and want to set up automatic module -loading with kmod, the kernel module loader, here is the section I -currently use in my modprobe.conf file: - -# Sound -alias sound-slot-0 opl3sa2 -options opl3sa2 io=0x370 mss_io=0x530 mpu_io=0x330 irq=7 dma=0 dma2=3 -options opl3 io=0x388 - -That's all it currently takes to get an OPL3-SA3 card working on my -system. Once again, if you have any other problems, email me at the -address listed above. - -Scott diff --git a/Documentation/sound/oss/VIA-chipset b/Documentation/sound/oss/VIA-chipset deleted file mode 100644 index 37865234e54d..000000000000 --- a/Documentation/sound/oss/VIA-chipset +++ /dev/null @@ -1,43 +0,0 @@ -Running sound cards on VIA chipsets - -o There are problems with VIA chipsets and sound cards that appear to - lock the hardware solidly. Test programs under DOS have verified the - problem exists on at least some (but apparently not all) VIA boards - -o VIA have so far failed to bother to answer support mail on the subject - so if you are a VIA engineer feeling aggrieved as you read this - document go chase your own people. If there is a workaround please - let us know so we can implement it. - - -Certain patterns of ISA DMA access used for most PC sound cards cause the -VIA chipsets to lock up. From the collected reports this appears to cover a -wide range of boards. Some also lock up with sound cards under Win* as well. - -Linux implements a workaround providing your chipset is PCI and you compiled -with PCI Quirks enabled. If so you will see a message - "Activating ISA DMA bug workarounds" - -during booting. If you have a VIA PCI chipset that hangs when you use the -sound and is not generating this message even with PCI quirks enabled -please report the information to the linux-kernel list (see REPORTING-BUGS). - -If you are one of the tiny number of unfortunates with a 486 ISA/VLB VIA -chipset board you need to do the following to build a special kernel for -your board - - edit linux/include/asm-i386/dma.h - -change - -#define isa_dma_bridge_buggy (0) - -to - -#define isa_dma_bridge_buggy (1) - -and rebuild a kernel without PCI quirk support. - - -Other than this particular glitch the VIA [M]VP* chipsets appear to work -perfectly with Linux. diff --git a/Documentation/sound/oss/cs46xx b/Documentation/sound/oss/cs46xx deleted file mode 100644 index b54432709863..000000000000 --- a/Documentation/sound/oss/cs46xx +++ /dev/null @@ -1,138 +0,0 @@ - -Documentation for the Cirrus Logic/Crystal SoundFusion cs46xx/cs4280 audio -controller chips (2001/05/11) - -The cs46xx audio driver supports the DSP line of Cirrus controllers. -Specifically, the cs4610, cs4612, cs4614, cs4622, cs4624, cs4630 and the cs4280 -products. This driver uses the generic ac97_codec driver for AC97 codec -support. - - -Features: - -Full Duplex Playback/Capture supported from 8k-48k. -16Bit Signed LE & 8Bit Unsigned, with Mono or Stereo supported. - -APM/PM - 2.2.x PM is enabled and functional. APM can also -be enabled for 2.4.x by modifying the CS46XX_ACPI_SUPPORT macro -definition. - -DMA playback buffer size is configurable from 16k (defaultorder=2) up to 2Meg -(defaultorder=11). DMA capture buffer size is fixed at a single 4k page as -two 2k fragments. - -MMAP seems to work well with QuakeIII, and test XMMS plugin. - -Myth2 works, but the polling logic is not fully correct, but is functional. - -The 2.4.4-ac6 gameport code in the cs461x joystick driver has been tested -with a Microsoft Sidewinder joystick (cs461x.o and sidewinder.o). This -audio driver must be loaded prior to the joystick driver to enable the -DSP task image supporting the joystick device. - - -Limitations: - -SPDIF is currently not supported. - -Primary codec support only. No secondary codec support is implemented. - - - -NOTES: - -Hercules Game Theatre XP - the EGPIO2 pin controls the external Amp, -and has been tested. -Module parameter hercules_egpio_disable set to 1, will force a 0 to EGPIODR -to disable the external amplifier. - -VTB Santa Cruz - the GPIO7/GPIO8 on the Secondary Codec control -the external amplifier for the "back" speakers, since we do not -support the secondary codec then this external amp is not -turned on. The primary codec external amplifier is supported but -note that the AC97 EAPD bit is inverted logic (amp_voyetra()). - -DMA buffer size - there are issues with many of the Linux applications -concerning the optimal buffer size. Several applications request a -certain fragment size and number and then do not verify that the driver -has the ability to support the requested configuration. -SNDCTL_DSP_SETFRAGMENT ioctl is used to request a fragment size and -number of fragments. Some applications exit if an error is returned -on this particular ioctl. Therefore, in alignment with the other OSS audio -drivers, no error is returned when a SETFRAGs IOCTL is received, but the -values passed from the app are not used in any buffer calculation -(ossfragshift/ossmaxfrags are not used). -Use the "defaultorder=N" module parameter to change the buffer size if -you have an application that requires a specific number of fragments -or a specific buffer size (see below). - -Debug Interface ---------------- -There is an ioctl debug interface to allow runtime modification of the -debug print levels. This debug interface code can be disabled from the -compilation process with commenting the following define: -#define CSDEBUG_INTERFACE 1 -There is also a debug print methodolgy to select printf statements from -different areas of the driver. A debug print level is also used to allow -additional printfs to be active. Comment out the following line in the -driver to disable compilation of the CS_DBGOUT print statements: -#define CSDEBUG 1 - -Please see the definitions for cs_debuglevel and cs_debugmask for additional -information on the debug levels and sections. - -There is also a csdbg executable to allow runtime manipulation of these -parameters. for a copy email: twoller@crystal.cirrus.com - - - -MODULE_PARMS definitions ------------------------- -module_param(defaultorder, ulong, 0); -defaultorder=N -where N is a value from 1 to 12 -The buffer order determines the size of the dma buffer for the driver. -under Linux, a smaller buffer allows more responsiveness from many of the -applications (e.g. games). A larger buffer allows some of the apps (esound) -to not underrun the dma buffer as easily. As default, use 32k (order=3) -rather than 64k as some of the games work more responsively. -(2^N) * PAGE_SIZE = allocated buffer size - -module_param(cs_debuglevel, ulong, 0644); -module_param(cs_debugmask, ulong, 0644); -cs_debuglevel=N -cs_debugmask=0xMMMMMMMM -where N is a value from 0 (no debug printfs), to 9 (maximum) -0xMMMMMMMM is a debug mask corresponding to the CS_xxx bits (see driver source). - -module_param(hercules_egpio_disable, ulong, 0); -hercules_egpio_disable=N -where N is a 0 (enable egpio), or a 1 (disable egpio support) - -module_param(initdelay, ulong, 0); -initdelay=N -This value is used to determine the millescond delay during the initialization -code prior to powering up the PLL. On laptops this value can be used to -assist with errors on resume, mostly with IBM laptops. Basically, if the -system is booted under battery power then the mdelay()/udelay() functions fail to -properly delay the required time. Also, if the system is booted under AC power -and then the power removed, the mdelay()/udelay() functions will not delay properly. - -module_param(powerdown, ulong, 0); -powerdown=N -where N is 0 (disable any powerdown of the internal blocks) or 1 (enable powerdown) - - -module_param(external_amp, bool, 0); -external_amp=1 -if N is set to 1, then force enabling the EAPD support in the primary AC97 codec. -override the detection logic and force the external amp bit in the AC97 0x26 register -to be reset (0). EAPD should be 0 for powerup, and 1 for powerdown. The VTB Santa Cruz -card has inverted logic, so there is a special function for these cards. - -module_param(thinkpad, bool, 0); -thinkpad=1 -if N is set to 1, then force enabling the clkrun functionality. -Currently, when the part is being used, then clkrun is disabled for the entire system, -but re-enabled when the driver is released or there is no outstanding open count. - |