Usbat2 November 2001

usbat2@lists.lysator.liu.se

4 participants
7 discussions

basics
by Herald van der Breggen 18 Nov '01

18 Nov '01

Hello, Did anyone make start already making hands dirty? I just did. My first lines are these: in unusual_devs.h: UNUSUAL_DEV( 0x04e6, 0x1010, 0x0000, 0x9999, "Shuttle", "SCM USBAT-02", US_SC_SCSI, US_PR_CB, usbat2_Initialisation, 0), The first two arguments were not too difficult. The next two should be bcdDeviceMin and bcdDeviceMax. I wondered what this could be. "bcd" stands for "binary code data" (for example "2.10" has bcd "0x0210"). Because I don't know any what values should be mentioned here I did just something. Any better ideas? The next two arguments have limitations to string length (see usb.c). The other values I "borrowed" from other definitions. Except usbat2_Initialisation, which has to be defined in some C-file. I looked into the Makefile. There I saw: usb-storage-obj-$(CONFIG_USB_STORAGE_SHUTTLE_COMPACTFLASH) += shuttle_cf.o And no shuttle_cf.c file was present. So I guess this is the one Matthew expect us to create? I created a shuttle_cf.c with a dumme usbat2_Initialisation and decided to make a new usb_storage.o module and see whether is was possible to generate a debug message in the logfile when initialisation was triggered. Therefore I added a few lines to the Makefile in the directory where my development files are. Something like this: TOPDIR := /usr/src/linux-2.4 CONFIG_USB_STORAGE := y CONFIG_USB_STORAGE_SHUTTLE_COMPACTFLASH := y But typing "make" resulted in an overwelming number of error messages, all about parsing errors in kernel header files, for example: /usr/src/linux-2.4/drivers/scsi/scsi.h:582: parse error before `:' This lines contains: unsigned online:1; I guess some compile flags should be given to gcc.... Maybe I should proceed in another way.... Suggestions? Herald

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Re: USBAT-02 flash reader
by Hans Persson 08 Nov '01

08 Nov '01

JMK <koning(a)pobox.com> writes: > It turns out that the USBAT-02 driver will work > for many more devices then the Kodak DC3800. I'm helping to get my > Microtech Zio! compact flash card reader working. Other people have > posted other devices this driver should work for, they include: > Microtech Zio! Compact flash reader > Kingston Technology PCREAD-USB/CF > Delkin Efilm reader2 > RCA LYRA2 MP3 portable Interesting. That should help getting more people to help, I guess. I've listed them on the web page. > P.S. I just got Hamilton's Mindstar Rising in the mail. Congratulations. That's really good; actually I like that series better than the later Night's Dawn series. Hans -- +----------------------------------------------------------------------------+ | Hans Persson http://www.lysator.liu.se/~unicorn/ | | unicorn(a)lysator.liu.se http://www.lysator.liu.se/~unicorn/fandom/ | +----------------------------------------------------------------------------+

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Re: USBAT-02 flash reader
by Hans Persson 08 Nov '01

08 Nov '01

Herald van der Breggen <herald(a)breggen.xs4all.nl> writes: > Great work Hans! Thanks! > I like the mailing list archieve. How often wil the archieve be > updated? Each time someone sends a message. Mailman is a nice list manager program. > And I like the web page also. Some suggestions for the web page: [...] OK, fixed. > And soon a status page? I hope there will soon a driver with the two > features: > > 1. when you plug in the device, the driver logs "usbat2 device > connected" > 2. when you plug out the device the driver yells "you plugged out > that fuckin' device didn't you, bastard?" (or a bit more > polite maybe...) ;-) Of course, as soon as possible. I'm looking forward to trying it. Hans -- +----------------------------------------------------------------------------+ | Hans Persson http://www.lysator.liu.se/~unicorn/ | | unicorn(a)lysator.liu.se http://www.lysator.liu.se/~unicorn/fandom/ | +----------------------------------------------------------------------------+

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sources of mass storage drivers
by Herald van der Breggen 07 Nov '01

07 Nov '01

I guess all of you know the stuff below, but I am not shure. The most recent usb mass storage drivers are available via CVS: Do once: cvs -d:pserver:anonymous@cvs.linux-usb.sourceforge.net:/cvsroot/linux-usb login (with empty password, after that a .cvspass-file is created in the current working directory) Then: cvs -d:pserver:anonymous@cvs.linux-usb.sourceforge.net:/cvsroot/linux-usb checkout storage All the files will be checked out in th eworking directory. Some words of Matthew Dharm: Take a look at the ISD-200 code -- it does something very similar. Part of the "bigness" here is isolating a generic or semi-generic translation layer -- something that can take SCSI commands in one end, and translate them to IDE/ATA register accesses suitable for passing on to a lower-level driver. Some of this can probably be stolen/borrowed from the ISD-200 driver. Much will need to be hand-crafted from scratch. and Look at other usb-storage sections to get a good idea of how this works. Try starting with transport.c, specifically Bulk_transport() to see if that will give you some insight. Another good source for information is the usb mass storage mailinglist. Send a mail to usb-storage-request(a)one-eyed-alien.net with "subscribe" in the body. It's up to Hans whether he wants to add info to the web page ;-) Anyway it is archived now and available for all of us and for new volunteers.... Herald

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Re: USBAT-02 flash reader
by Hans Persson 07 Nov '01

07 Nov '01

Mike Gibson <gibson(a)cs.utah.edu> writes: > > Maintaining this is something that I can volonteer to do. I don't > > think that my C skills are up to writing a device driver (I haven't > > written C in five years), but I do the documentation. Mostly, people > > don't do this unless threatened... ;-) > > True. This would be great. Sounds like you're willing to keep it > up to date too. Keeping the info in one place is a great idea. OK, now there's a very basic web page up as well. Not much there, but at least it's something that you can bookmark. http://www.lysator.liu.se/~unicorn/hacks/usbat2/ At least it's something for the search engines to find. > And don't be too modest about you C skills. You'd probably be > surprised at how well you can do! Feel free to do coding as you see > fit! I'll definitely look around and have a look, so we'll see what happens. Hans -- +----------------------------------------------------------------------------+ | Hans Persson http://www.lysator.liu.se/~unicorn/ | | unicorn(a)lysator.liu.se http://www.lysator.liu.se/~unicorn/fandom/ | +----------------------------------------------------------------------------+

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Re: USBAT-02 flash reader
by Hans Persson 06 Nov '01

06 Nov '01

Mike Gibson <gibson(a)cs.utah.edu> writes: > > Another thing I'm thinking of is the possibility of creating some > > utility to read from the device using the available USB code. I'm told > > that this should be possible. This was it's not necessary to interact > > with filesystems and so (no mounting), so it should be an easier hack > > to start off with. > > I think that Herald replied to this earlier. While it seems easier to do > this. It turns out that it really would only be good for learning how > things work. A lot of things that you can do in the kernel, you just > can't do the same way in user space. Of course there are features with a driver that a simple script can't do. You can't mount a script and read images directly into the GIMP or whatever. On the other hand, perhaps a script would be more portable to other platforms than Linux (*BSD, etc)? I don't know how different the USB system would be there. Hans -- +----------------------------------------------------------------------------+ | Hans Persson http://www.lysator.liu.se/~unicorn/ | | unicorn(a)lysator.liu.se http://www.lysator.liu.se/~unicorn/fandom/ | +----------------------------------------------------------------------------+

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Re: USBAT-02 flash reader
by Hans Persson 06 Nov '01

06 Nov '01

Herald van der Breggen <herald(a)breggen.xs4all.nl> writes: > Maybe it's handy to have a mailinglist for usbat2-developers-only > (besides "linux-usb-devel(a)lists.sourceforge.net" which is for a wider > audiance). > Even a mail alias would be fine. So, I would like it! OK, done. You should have gotten a mail about it just now. > I also considered to maintain a status page for development of this > driver, with all the nice and usefull tips&hints and links we have > so far and of course the source code of the latest usbat2-driver ;-) > Maybe I can find some time to do that. If I did, I will let you > know. Maintaining this is something that I can volonteer to do. I don't think that my C skills are up to writing a device driver (I haven't written C in five years), but I do the documentation. Mostly, people don't do this unless threatened... ;-) Hans -- +----------------------------------------------------------------------------+ | Hans Persson http://www.lysator.liu.se/~unicorn/ | | unicorn(a)lysator.liu.se http://www.lysator.liu.se/~unicorn/fandom/ | +----------------------------------------------------------------------------+

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Usbat2 November 2001