Date: Wed, 2 Jun 1999 02:24:53 -0400 From: Christopher Masto <chris@netmonger.net> To: hardware@freebsd.org Subject: Ugly patches for PCMCIA flash ATA Message-ID: <19990602022453.A23670@netmonger.net>
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It's a pain to hook up the port replicator, serial cable, etc. every time I want to download some pictures from my camera, so I hacked the pccard support back into the -current wd driver. I know that Warner is working on the pccard newbus stuff; this was just an interim workaround. Anyway, I did it for me, but this subject comes up once in a while, so I thought I'd mention it here so it'll at least be in the archives if someone needs it. The actual patch is on http://www.netmonger.net/~chris/freebsd/ The README follows: This is an ugly hack to make my SanDisk PC card compact flash adapter work on current (as of 1-Jun-1999). It probably work with other ATA flash cards as well. The following things are done: 1. PCCARD interface added Minor adjustments for -current. I removed the static configuration thing since I didn't understand it. 2. Attempts to allow removal/reinsertion This is based on code that I believe came from Tatsumi Hosokawa at some point. I took out some of the TODOs because this whole thing is going away soon anyway. In my experimentation, if the flash card is unmounted before being ejected, it's perfectly safe. I have switched between a 3C509 and the SanDisk card several times with no ill effects. It appears to be Good Enough For Now. 3. Workaround for funky I/O ports This is the really ugly part. The wd driver makes assumptions that pretty much limit you to having two IDE controllers, at 0x1f0 and 0x170. While my VAIO only has one IDE controller onboard, and the SanDisk card is able to appear at 0x170, it didn't seem to work properly unless I booted with the card in. Perhaps the VAIO reserves that space for the optional CDROM. In any event, the SanDisk card has a configuration that allows it to be put at any location. The catch is that wd also assumes that the alternate status register is located 0x206 above the base port. In the case of the SanDisk's "anywhere" configuration, this is not true - the ports are all lumped together. So there's a little hack that uses a different offset if the base port is not 0x170 or 0x1f0. To use (assuming your hardware is identical to mine): Patch. Configure kernel. Add an extra wdc, disabled. Add a drive to it. > controller wdc1 at isa? disable port IO_WD2 irq 15 > disk wd2 at wdc1 drive 0 Configure pccard.conf. If you have the SanDisk card I have, it would go like this: > card "SunDisk" "SDP" > config 0x1 "wdc1" 15 > insert echo SunDisk Flash ATA Inserted > remove echo SunDisk Flash ATA Removed Note that the configuration is changed from the sample file's 3 to 1. config 3 has it at 0x170, which isn't happy on my laptop. That should do it. On my machine, when I pop the Compact Flash from my Kodak DC210 into the SanDisk adapter, and into the card slot, I see: > Card inserted, slot 0 > wdc1: unit 0 (wd2): <SunDisk SDCFB-8> > wd2: 7MB (15680 sectors), 245 cyls, 2 heads, 32 S/T, 512 B/S > wd2: ATA INQUIRE valid = 0001, dmamword = 0000, apio = 0000, udma = 0000 I can then mount -t msdos /dev/wd2s1 /flash and access the files. As I said, this works _for me_. My primary objective was to regain convenient use of my digital camera under -current while waiting for the pccard newbusification. I know this is ugly and wrong and incomplete, but it does what I need for now. I am putting it here in case it is of use to someone else. And thanks to SanDisk for putting extremely detailed documentation on their web site, and for making such a nifty adapter. -- Christopher Masto Senior Network Monkey NetMonger Communications chris@netmonger.net info@netmonger.net http://www.netmonger.net Free yourself, free your machine, free the daemon -- http://www.freebsd.org/ To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hardware" in the body of the message
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