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Diffstat (limited to 'drivers/sound/README.CONFIG')
| -rw-r--r-- | drivers/sound/README.CONFIG | 75 |
1 files changed, 0 insertions, 75 deletions
diff --git a/drivers/sound/README.CONFIG b/drivers/sound/README.CONFIG deleted file mode 100644 index 5cd199230..000000000 --- a/drivers/sound/README.CONFIG +++ /dev/null @@ -1,75 +0,0 @@ -Sound Driver Configuration Notes -Michael Chastain, <mailto:mec@shout.net> -18 Apr 1998 - -The Linux sound driver is derived from OSS/Free, a multi-platform -Unix sound driver by Hannu Savolainen. You can find out -more about OSS/Free and the commercial version, OSS/Linux, at -<http://www.opensound.com/ossfree>. - -OSS/Free comes with the configuration program 'configure.c'. We have -discarded that program in favor of a standard Linux configuration file -Config.in. - -Config.in defines a set of symbols with the form CONFIG_SOUND_*. -These are the -native symbols-. Here is a description: - - CONFIG_SOUND - - This is the master symbol. It controls whether the basic - sound-driver code is resident, modular, or not present at all. - - If the basic driver is resident, each primary and secondary - driver can be resident, modular, or not present. - - If the basic driver is modular, each primary and secondary driver - can be modular or not present. - - And if the basic driver is not present, all other drivers are - not present, too. - - Primary drivers - - These are symbols such as CONFIG_SOUND_SB, CONFIG_SOUND_SB_MODULE, - CONFIG_SOUND_TRIX, or CONFIG_SOUND_TRIX_MODULE. Each driver - that the user can directly select is a primary driver and has - the usual pair of symbols: one resident and one modular. - - Each primary driver can be either resident or modular. - - Secondary drivers - - Primary drivers require the support of secondary drivers, such - as ad1848.o and uart401.o. - - In Makefile, each primary driver has a list of required secondary - drivers. The secondary driver requirements are merged and a - single definition is emitted at the end. - - For each secondary driver: if any resident primary driver - requires it, that secondary driver will be resident. If no - resident primary driver requires it but some modular primary - driver requires it, then that secondary driver will be modular. - Otherwise that secondary driver will be not present. - - OSS/Free also contains tests for secondary drivers. The Makefile - defines symbols for these drivers in EXTRA_CFLAGS. - - CONFIG_AUDIO, CONFIG_MIDI, CONFIG_SEQUENCER - - These three drivers are like secondary drivers, but not quite. - They can not yet be separated into modules. They are always - linked into the basic sound driver, whether they are needed - or not. (This is in case a primary driver is added to the - system later, as a module, and needs these facilities. If it - were possible to modularise them, then they would get built as - additional modules at that time). - -The OSS/Free code does not use the native symbols directly, primarily -because it does not know about modules. I could edit the code, but that -would make it harder to upgrade to new versions of OSS/Free. Instead, -the OSS/Free code continues to use -legacy symbols-. - -legacy.h defines all the legacy symbols to 1. This is because, whenever -OSS/Free tests a symbol, the Makefile has already arranged for that -driver to be included. |