Date: Wed, 25 Aug 2004 18:36:26 -0600 (MDT) From: "M. Warner Losh" <imp@bsdimp.com> To: nate@root.org Cc: current@freebsd.org Subject: Re: No more floppy drive Message-ID: <20040825.183626.130239655.imp@bsdimp.com> In-Reply-To: <412D2087.4000306@root.org> References: <412D12D4.1000401@root.org> <20040825.163521.103131991.imp@bsdimp.com> <412D2087.4000306@root.org>
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In message: <412D2087.4000306@root.org>
Nate Lawson <nate@root.org> writes:
: M. Warner Losh wrote:
: > In message: <412D12D4.1000401@root.org>
: > Nate Lawson <nate@root.org> writes:
: > : There are only two ways currently to find fd0 on ISA systems: ACPI _FDE
: > : probing and hints. The acpi probe automatically falls back to the hints
: > : system if _FDE fails so you should leave the hint.fd.0 lines in but
: > : comment out hint.fdc lines (as you've done).
: >
: > I think this is a bad idea, but may be what we have to do for 5.3. We
: > can find out what drives are on the system by asking the rtc() if
: > there's no _FDE, which is what the old, pre-acpi code did (which is
: > why people are seeing their drives disappear now).
:
: This is incorrect. The acpi commits did not remove any rtc probe; there
: never was one. There were only two commits by me to fdc.c so check them
: out to see what I mean. All I did was move the existing hints probe
: into its own function, fdc_hints_probe(). The easiest way to see how
: fdX gets probed is to look for callers to fdc_add_child(). They are
: fdc_acpi_probe_children() and fdc_hints_probe(). The latter is called
: by the ISA attachment or the ACPI attachment if the _FDE method is not
: present. (BTW, it seems the pccard attachment doesn't probe this way?)
The pccard attachment knows there must be a fd.
Warner
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