Hi 2009/7/14 Ulrich Gerster <gerst...@dhbw-loerrach.de>: > Hello again, > >>>> Magnus Lilja <lilja.mag...@gmail.com> 14.07.09 13.08 Uhr >>> >> Hi > >>> Another strange thing is the nand driver. I build my u-boot with: >>> #define CONFIG_MX31_NAND 1 >>> #define CONFIG_CMD_NAND >>> #define CONFIG_SYS_NO_FLASH 1 >>> #define CONFIG_ENV_IS_IN_NAND 1 >>> #define CONFIG_SYS_NAND_BASE CS0_BASE >>> #define CONFIG_SYS_MAX_NAND_DEVICE 1 >>> #define CONFIG_SYS_NAND_MAX_CHIPS 1 >>> >>> If I then try to get "flinfo" information u-boot jumps to the next command >>> line and prints nothing. >>> If I try "nand info" I get information about nand device 0. >>> Another strange thing is that I can't read from nand flash but I can write. >>> >>> Do you have any suggestions? > >> The only i.MX31 NAND driver I've used in U-boot is the one I submitted >> to the list last year but it was rejected. Other people have sent >> updated drivers (I think there was a i.MX27 driver posted not long >> ago), but I haven't tried these. >> Even so, the CONFIG_SYS_NAND_BASE looks incorrect but I don't know if >> that's the only problem. > > CONFIG_SYS_NAND_BASE CS0_BASE should be correct because the Flash is > located at 0xA0000000 which should be CS0_BASE. Why do you think it is wrong?
Because the NAND flash is not connected to any of the standard memory mapped chip selects of the i.MX31. The i.MX31 has a dedicated NAND interface. But I don't think CONFIG_SYS_NAND_BASE matters for the i.MX31, the rest of U-boot needs it to be defined to something. > > I used the patch from you out of this posting: > [U-Boot-Users] [PATCH RFC 3/5] i.MX31: Add i.MX31 NAND Flash Controller > driver. > http://lists.denx.de/pipermail/u-boot/2008-August/038239.html > > They should work, or not? Do they require something else? I haven't tried that driver on a recent U-boot so I don't know if (or how) it will work when applied to a recent U-Boot. Did you define the following two as well (they might have been renamed since last year). #define CFG_ENV_OFFSET 0x40000 /* CFG_ENV_SIZE has to be a multiple of the NAND block size */ #define CFG_ENV_SIZE (128 * 1024) If CFG_ENV_OFFSET (or perhaps it's called CONFIG_ENV_OFFSET nowadays) is zero, then 'saveenv' will overwrite your existing redboot. /Magnus _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
