Rockbox Development > New Ports
Cowon D2
shotofadds:
I'm still trying to work out why upgrading to the D2+ firmware causes these problems for some people.
The D2+ firmware doesn't seem to use a new version of the Telechips NAND driver (both D2+ x.02 and D2 x.58 contain the identifer string "SIGBYAHONG_TNFTL_TCC78X_V000474", whereas this version number did change slightly in some older versions) - so there shouldn't be any difference as far as Rockbox is concerned.
The "obvious" thing might just be to try upping the MAX_WRITE_CACHES value in firmware\target\arm\ata-nand-telechips.c (eg. from 8 to 16), and then re-compiling the bootloader. I can't see why that should be necessary, though.
If that still doesn't work, I'll need to write some code to print out some more debug information from your D2. Without being able to reproduce the problem myself or be able to retrieve data directly from your D2, this could be tricky. :-[
grantmasterflash:
--- Quote from: shotofadds on April 27, 2009, 05:14:19 PM ---The "obvious" thing might just be to try upping the MAX_WRITE_CACHES value in firmware\target\arm\ata-nand-telechips.c (eg. from 8 to 16), and then re-compiling the bootloader. I can't see why that should be necessary, though.
If that still doesn't work, I'll need to write some code to print out some more debug information from your D2. Without being able to reproduce the problem myself or be able to retrieve data directly from your D2, this could be tricky. :-[
--- End quote ---
I upped MAX_WRITE_CACHES in firmware\target\arm\ata-nand-telechips.c from 8 to 16 and recompiled the bootloader. Unfortunately, I still get the PANIC message.
If there's anything I can do to provide some debug, I'll be glad to help. Just let me know.
grantmasterflash:
Regarding these "*PANIC* Max NAND write caches reached" errors during Rockbox boot I've been receiving since flashing my D2 to the D2+ firmware:
I flashed back to D2 3.59 firmware, then flashed to D2+ 3.02 firmware, then put the latest daily Rockbox bootloader and zip build on my device. Rockbox is now booting without a problem and I haven't seen these messages at all. I don't know if the reflashing fixed this or if something has changed in the most recent Rockbox builds.
shotofadds:
Well, that's interesting, but unfortunately it gives me nothing to go on in order to fix the problem. If you find a way of making these errors happen repeatably, do let me know...
3amsleep:
I (really) hate to be such a nuisance, but I been looking every day here and in the trunk for the last year for any significant updates... I would really like to know if im just losing my time cause it seems to me that shotofadds lost interest in the project and though many people have offered help with the nand driver I've never seen any response from him regarding that.
is there anybody actually developing MMC support?, are there any NAND improvements not jet released?, shotofadds if you're just over the whole D2 thing, please just tell us so we can figure a way to keep the port developing.
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