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Subject: Re: Regarding Wake On USB input from S3 Sleep
To: Dee Zay <julianpark90611@gmail.com>, freebsd-acpi@freebsd.org
References: <CACMcRdfLERKud5_0GMKK1m7RF1DS8hxrhSxpZFEUyqpMWNS7EQ@mail.gmail.com>
From: Hans Petter Selasky <hps@selasky.org>
Message-ID: <56BC289F.2070208@selasky.org>
Date: Thu, 11 Feb 2016 07:22:23 +0100
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On 02/11/16 04:54, Dee Zay wrote:
> Dear FreeBSD ACPI Community,
>
> I am trying to implement WakeOnUSB (e.g. USB keyboard input) from S3 Sleep
> state, but have no clue where to start from.
> I noticed the PS2 keyboard is capable of waking up a system and also found
> there is a PS2 handler portion in asl from acpidump:
>
> Method (PS2K._PRW, 0, NotSerialized) // _PRW: Power Resources
> for Wake
> {
> Return (GPRW (0x6B, 0x03))
> }
> However, there is no such handle for individual usb ports other than its
> parent's class (\_SB_.PCI0.XHC_).
> Also, I found there are FreeBSD-specific ACPICA C codes under /sys/dev
> including acpi_button.c and acpi_lid.c, which are only for the fixed acpi
> components.
>
> So my question is,
> Is it possible to implement WakeOnUSB input for individual USB ports by
> somehow fixing the ACPICA C codes (without fixing the asl as it is
> system-dependent)? If so, how?
>
> I would really appreciate it if you could help me out here.
>
> Best regards,
> Julian
Hi,
The USB controller drivers shutdown the HC at suspend and reset at
resume. That has proven to work the best. At the moment I think wakeup
by USB resume is not supported.
--HPS