Date: Fri, 12 Mar 1999 17:57:26 -0800 From: Ted Faber <faber@ISI.EDU> To: mobile@freebsd.org Subject: pccardd guts: anyone understand struct dev_mem? Message-ID: <199903130157.RAA04121@boreas.isi.edu>
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-----BEGIN PGP SIGNED MESSAGE----- I've been dredging around the pccard stuff in my <ahem> copious free time, trying to get the PAO cnw driver to run under 3.1-RELEASE. In fact, I've got a version working pretty well. The code is a strict port of the PAO stuff, which is ported from linux, and although I have the netwave docs, I haven't gone over the workings of the driver enough to feel confident that it should go into the tree, but it works. The problem is that to make it work I had to open the guts of the pccard daemon's memory allocation routines, and make some rather arbitrary changes. The driver I have maps the memory rather than going through the I/O port space, and expects that memory to be mapped to a specific place in card memory as well as being mapped 8 bit, 1 wait state. Getting the offest into card memory was a matter of deleting one line in cardd.c . The flags are more problematic, but I believe that the raw information I need is in the CIS, and better yet, I think that pccardd reads it properly. But it stuffs it into a struct dev_mem, and ignores it. The struct is undocumented, and the names are too cryptic. My questions are: Does anyone know why the card memory address is arbitrarily reset to 0x4000 around line 520 of cardd.c ? If not, can we take it out? The correct value seems to have been read from the CIS and works. Can anyone explain what the fields in struct dev_mem are (from cardd.h) or point me toward any additional documentation of the CIS tuples that might help me parse it? I've looked at readcis.[ch] in usr.sbin/pccard/pccardd, and cis.h in /sys/pccard/ , but the first 2 are opaque to me and uncommented, and cis.h is close, but not quite enough. Once I have something that I think recognizes the memory parameters in the CIS, I'm happy to roll a patch and hand it to people to test. Thanks! - ---------------------------------------------------------------------- Ted Faber faber@isi.edu USC/ISI Computer Scientist http://www.isi.edu/~faber (310) 822-1511 x190 PGP Key: http://www.isi.edu/~faber/pubkey.asc -----BEGIN PGP SIGNATURE----- Version: 2.6.2 iQCVAwUBNunGBYb4eisfQ5rpAQERzAP9Gy9Aprtvpz+cRiF8sTD4kDaFOgE2Kskf wstrP1uhtynVx6S5blpTQmL8zUyN4Dc7r4rqOOzKqgNvd5m5HhpGr+/zCZiHuUoo 9DJ/f7KHogYUDR8r8Eq2UAZ/bqNawVALGEF6Z8PgYG5eTSeNP/ld7bZ+31ueyzB/ ce7nXIIu+Jw= =bbIO -----END PGP SIGNATURE----- To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-mobile" in the body of the message
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