Attachment 701323 Details for Bug 914796 – a script that activates the headphone/external speaker jack on an iMac running Fedora 18

a script that activates the headphone/external speaker jack on an iMac running Fedora 18

fixmacsound.py (text/x-python), 1.22 KB, created by Hugh Caley on 2013-02-22 19:09:51 UTC

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Creator: Hugh Caley

Created: 2013-02-22 19:09:51 UTC

Size: 1.22 KB

patch

obsolete

>#!/usr/bin/env python
>
># This command fixes the external speakers on the iMacs.
># But if you unplug them and plug them back in, you'll need to run it again!
>
>import os
>import struct
>from fcntl import ioctl
>
>def __ioctl_val(val):
>  # workaround for OverFlow bug in python 2.4
>  if val & 0x80000000:
>    return -((val^0xffffffff)+1)
>  return val
>
>IOCTL_INFO = __ioctl_val(0x80dc4801)
>IOCTL_PVERSION = __ioctl_val(0x80044810)
>IOCTL_VERB_WRITE = __ioctl_val(0xc0084811)
>
>def set(nid, verb, param):
>  verb = (nid << 24) | (verb << 8) | param
>  res = ioctl(FD, IOCTL_VERB_WRITE, struct.pack('II', verb, 0))
>
>FD = os.open("/dev/snd/hwC0D0", os.O_RDONLY)
>info = struct.pack('Ii64s80si64s', 0, 0, '', '', 0, '')
>res = ioctl(FD, IOCTL_INFO, info)
>name = struct.unpack('Ii64s80si64s', res)[3]
>if not name.startswith('HDA Codec'):
>  raise IOError, "unknown HDA hwdep interface"
>res = ioctl(FD, IOCTL_PVERSION, struct.pack('I', 0))
>version = struct.unpack('I', res)
>if version < 0x00010000:	# 1.0.0
>  raise IOError, "unknown HDA hwdep version"
>
># initialization sequence starts here...
>
>set(0x01, 0x715, 0x04) # 0x01071504 (SET_GPIO_DATA)
>set(0x01, 0x716, 0x0c) # 0x0107160c (SET_GPIO_MASK)
>set(0x01, 0x717, 0x0c) # 0x0107170c (SET_GPIO_DIRECTION)
>
>os.close(FD)

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Attachments on bug 914796: 701323