Le vendredi 26 juin 2009 21:10:16, Uwe Hermann a écrit : > Hi, > > On Fri, Jun 26, 2009 at 12:33:14PM +0200, CybFr wrote: > > I'd like to re-open a tread from Michal Janke about supporting Dell > > latitude C610 and its SMSC LPC47N252 SuperIO. > > > > - I've found the closest chip from SMSC was FDC37N972, supported by > > superiotool so I added corresponding entries in smsc.c. > > > > - for FDC, UARTS, KBD, RTC, everything seems quite common so I added it > > in /superio/smsc/smsssuperio/superio.c. > > (the big difference betweenn supported smsc chips an LPC47N252 is the > > EC-8051 core... ) > > > > What could be the next step ? > > Well, that's the million dollar question. We don't yet support _any_ > laptop in coreboot exactly because of the EC problems (well, among other > problems). > > Luckily, the LPC47N252 datasheet seems to contain some amount of info > about the EC, so maybe it's doable. However, we don't know too much > about this stuff at this point. Chipset is 830MP which should be doable, > so all in all this might be a reasonably well-suited laptop if you want > to invest some time and energy into coreboot on this laptop.
I have both > I'm also trying to do something similar with an ancient 440BX laptop > here, see http://www.coreboot.org/Dell_Latitude_CPi_A366XT, but I > haven't gotten very far, yet. > > First thing you should do is to get a known-good backup image of your > current BIOS, flash that on a different chip and see if the laptop still > boots with that. Until this works, I wouldn't recommend to proceed. > > Is this a PLCC chip, and is it in a socket or soldered onto the board? > If soldered, do you have equipment and skills to desolder it and put on > a socket? See http://www.coreboot.org/Soldering_a_socket_on_your_board > for PLCC sockets, for other types of chips it may be a bit harder. It's a soldered PLCC, I think I can manage to socket it > > Can you make high-res pictures of the whole laptop board (front and back > side etc, especially of the Super I/O / EC? We can put those in the wiki > also if you want to release them under a freeish license (CC, public > domain, etc). I'll begin with that, just after my one week holydays. > > The next step would probably be to find out where the EC code lives in > the flash ROM chip, make a coreboot.rom which leaves that area empty > and then 'dd' the EC blob over the empty area. Flash that, attach a POST > card and/or null-modem cable and see what happens... > > Anyway, if you have any superiotool or superio/smsc/smsssuperio/superio.c > patches which are generic and could be reused for other stuff, please post > them with a Signed-off-by so we can commit them, see > http://www.coreboot.org/Development_Guidelines#Sign-off_Procedure > Done for superiotool, for superio.c, I need to check if what I guessed is exact (LPC47N252 is exactly the same as other smsc chips for serials io) Thanks a lot for support. -- FR -- coreboot mailing list: [email protected] http://www.coreboot.org/mailman/listinfo/coreboot
