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  From: Avery Pennarun <apenwarr@worldvisions.ca>
  To  : Edward A. Falk <falconer@best.com>
  Date: Wed, 8 Dec 1999 20:57:40 -0500

Re: Control apm

On Wed, Dec 08, 1999 at 05:46:55PM -0800, Edward A. Falk wrote:

> Here is an executive summary of the ioctls I added to apm_bios.c:
> 
>   APM_IOC_CHECK
> 	Executes bios call 5300 to return information about
> 	the apm bios.  Not very useful, and I don't think I'd
> 	keep it.
> 
>   APM_IOC_ENABLE
> 	Enable or disable apm.  Extremely useful.
> 
>   APM_IOC_DEFAULTS
> 	Reset to power-on defaults.  Don't know if it's
> 	worth keeping.
> 
>   APM_IOC_GET_POWER
> 	Get current power levels.  Doesn't work for retrieving
> 	individual battery levels, but that might just be the
> 	bios in my laptop.
> 
>   APM_IOC_GET_STATE
> 	Get the state of individual components.  Doesn't work
> 	on my laptop.
> 
>   APM_IOC_GET_VERSION
> 	Returns apm protocol version.
> 
>   APM_IOC_GET_CAPS
> 	Return apm bios capabilities.
> 
>   APM_IOC_GET_TIMER
> 	Retrieve resume timer settings.
> 
>   APM_IOC_SET_TIMER
> 	Set resume timer
> 
>   APM_IOC_DISABLE_TIMER
> 	Disable resume timer
> 
>   APM_IOC_RING
> 	Control resume-on-ring function

Note that many of these are informational and should be reported in
/proc/apm instead.  I'd rather control some of the others with sysctls
(/proc/sys/...) but ioctls would be okay too.

It's nice to see someone working on it though.

Have fun,

Avery