SND_AC97_BUS(9) Control/Mixer API SND_AC97_BUS(9)NAME
snd_ac97_bus - create an AC97 bus component
int snd_ac97_bus(struct snd_card * card, int num, struct snd_ac97_bus_ops * ops, void * private_data, struct snd_ac97_bus ** rbus);
the card instance
the bus number
the bus callbacks table
private data pointer for the new instance
the pointer to store the new AC97 bus instance.
Creates an AC97 bus component. An struct snd_ac97_bus instance is newly allocated and initialized.
The ops table must include valid callbacks (at least read and write). The other callbacks, wait and reset, are not mandatory.
The clock is set to 48000. If another clock is needed, set (*rbus)->clock manually.
The AC97 bus instance is registered as a low-level device, so you don't have to release it manually.
Zero if successful, or a negative error code on failure.
COPYRIGHT Kernel Hackers Manual 3.10 June 2014 SND_AC97_BUS(9)
Check Out this Related Man Page
AC97(4) BSD Kernel Interfaces Manual AC97(4)NAME
ac97 -- generic AC97 codec driver
AC97 codecs contain the analog-to-digital (A/D), digital-to-analog (D/A), and mixing circuitry of many modern sound cards. AC97 codecs, for
the most part, do not talk to host busses like the PCI bus directly. Instead, they communicate through an interface chip, called the host
controller. The Ensoniq AudioPCI 97 (see eap(4)) is an example of such a host controller.
Unlike many drivers, the ac97 driver does not appear in the configuration file. Instead, the driver is automatically attached by the drivers
that require it.
SEE ALSO auacer(4), auich(4), auixp(4), autri(4), auvia(4), clcs(4), clct(4), eap(4), emuxki(4), esa(4), esm(4), fms(4), neo(4), yds(4)BUGS
The ac97 driver does not keep track of the current user settings and instead relies on the hardware to do this.
The ac97 driver could do more to detect mixer channels that don't work and cull them from the list.
BSD October 7, 1999 BSD
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