Date: Sun, 26 Sep 2004 18:33:17 -0700 (PDT) From: Rostislav Krasny <rosti_bsd@yahoo.com> To: "M. Warner Losh" <imp@bsdimp.com> Cc: freebsd-current@freebsd.org Subject: Re: new fdc(4) and new fdcontrol(8) behavior (5.3-BETA5) Message-ID: <20040927013317.85621.qmail@web14824.mail.yahoo.com> In-Reply-To: <20040926.150912.91757858.imp@bsdimp.com>
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--- "M. Warner Losh" <imp@bsdimp.com> wrote: > [[ Rostislav sent me dmesg off line ]] > > Interesting. > > You have no ACPI, so you are using only PNP and PNPBIOS to enumerate > your devices. > > The 'hints' device is selected in preference to the PNPBIOS device, > which is backwards (the PNPBIOS devices should take precidence). This > is why you are seeing what you are seeing. I think this is a bug, but > need to consult with some folks to make sure. Yes it use /boot/device.hints where is following line: hint.fdc.0.port="0x3F0" After changing that line to this: hint.fdc.0.port="0x3F2" I see following in the dmesg: fdc0: ic_type 90 part_id 80 fdc0: <Enhanced floppy controller> at port 0x3f7-0x3fc irq 6 drq 2 on isa0 fdc0: ic_type 90 part_id 80 fdc0: [MPSAFE] fdc0: [FAST] fd0: <1440-KB 3.5" drive> on fdc0 drive 0 fd1: <1440-KB 3.5" drive> on fdc0 drive 1 And fdc0 works fine! It looks like fdc0 tries allocating 6 ports starting from the "hint" port but 0x3f6 port is already allocated by atapci0, so fdc0 allocates next 6 ports after the 0x3f6 one. But I don't believe fdc0 is really using 0x3f7-0x3fc ports. I don't think the i430TX chipset support such reconfiguration. > It works because ISA devices are always mapped and we're talking to > the right registers. We're not allocating them, so there's a small > chance for collision with the more dynamic parts of the system. Since > you aren't doing dynamic things, you aren't colliding so things work. What ports fdc0 is really using in the above situation? BTW after the same changing of the /boot/device.hints file on 5.3-BETA4 (that is installed on the same computer) fdc0 cannot be initialized: fdc0: output ready timeout fdc0: cmd 3 failed at out byte 1 of 3 fdc0 failed to probe at port 0x3fe,0x3f7-0x3fc irq 6 drq 2 on isa0 The allocation algorithm is probably the same, besides it tries to allocate one more port (0x3fe in this situation or 0x3f7 with standard hint). __________________________________ Do you Yahoo!? Yahoo! Mail is new and improved - Check it out! http://promotions.yahoo.com/new_mail
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