auich(4) - NetBSD Manual Pages

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AUICH(4)                NetBSD Kernel Interfaces Manual               AUICH(4)


NAME

     auich -- Intel I/O Controller Hub integrated AC'97 audio device driver


SYNOPSIS

     auich* at pci? dev ? function ?
     audio* at audiobus?


DESCRIPTION

     The auich device driver supports the integrated AC'97 audio controller of
     the Intel I/O Controller Hub.  Supported chipsets include the i82801AA
     (ICH), i82801AB (ICH0), i82801BA (ICH2), i82440MX, i82801CA (ICH3),
     i82801DB (ICH4), i82801EB (ICH5), i82801FB (ICH6), i82801GB/GR (ICH7),
     and Intel 6300ESB.  The driver also supports SiS 7012, nForce MCP,
     nForce2 MCP-T, nForce3 MCP-T, nForce3 250 MCP-T, nForce4, and AMD 8111.

     The driver provides the following sysctl(8) read/write variable (when
     hardware support is available):

     hw.auich0.ac97rate
             Link rate of the device in Hz.  The driver automatically measures
             and calculates the correct rate so you usually don't need to
             change this.  There is, however, a chance that the driver miscal-
             culates the rate especially on an emulated hardware, resulting in
             an incorrect playback pitch.  When this happens you need to manu-
             ally set this variable to the correct value.  Try 48000 if you
             don't know the correct value as it is the default link rate.


SEE ALSO

     ac97(4), audio(4), pci(4), sysctl(8)


HISTORY

     The auich device driver appeared in NetBSD 1.6.


BUGS

     The `microphone' input DMA channel is not currently supported.

NetBSD 8.3                     October 13, 2016                     NetBSD 8.3